#define CVMX_PREFETCH_PREF0(address, offset) CVMX_PREFETCH_PREFX(0, address, offset)
#define CVMX_CLZ(result, input) asm ("clz %[rd],%[rs]" : [rd] "=d" (result) : [rs] "d" (input))
-#define MAX_RETRIES 3 /* Maximum number of times to retry failed transactions */
-#define MAX_PIPES 32 /* Maximum number of pipes that can be open at once */
-#define MAX_TRANSACTIONS 256 /* Maximum number of outstanding transactions across all pipes */
-#define MAX_CHANNELS 8 /* Maximum number of hardware channels supported by the USB block */
-#define MAX_USB_ADDRESS 127 /* The highest valid USB device address */
-#define MAX_USB_ENDPOINT 15 /* The highest valid USB endpoint number */
-#define MAX_USB_HUB_PORT 15 /* The highest valid port number on a hub */
-#define MAX_TRANSFER_BYTES ((1<<19)-1) /* The low level hardware can transfer a maximum of this number of bytes in each transfer. The field is 19 bits wide */
-#define MAX_TRANSFER_PACKETS ((1<<10)-1) /* The low level hardware can transfer a maximum of this number of packets in each transfer. The field is 10 bits wide */
+#define MAX_RETRIES 3 /* Maximum number of times to retry failed transactions */
+#define MAX_PIPES 32 /* Maximum number of pipes that can be open at once */
+#define MAX_TRANSACTIONS 256 /* Maximum number of outstanding transactions across all pipes */
+#define MAX_CHANNELS 8 /* Maximum number of hardware channels supported by the USB block */
+#define MAX_USB_ADDRESS 127 /* The highest valid USB device address */
+#define MAX_USB_ENDPOINT 15 /* The highest valid USB endpoint number */
+#define MAX_USB_HUB_PORT 15 /* The highest valid port number on a hub */
+#define MAX_TRANSFER_BYTES ((1<<19)-1) /* The low level hardware can transfer a maximum of this number of bytes in each transfer. The field is 19 bits wide */
+#define MAX_TRANSFER_PACKETS ((1<<10)-1) /* The low level hardware can transfer a maximum of this number of packets in each transfer. The field is 10 bits wide */
/* These defines disable the normal read and write csr. This is so I can add
- extra debug stuff to the usb specific version and I won't use the normal
- version by mistake */
+ extra debug stuff to the usb specific version and I won't use the normal
+ version by mistake */
#define cvmx_read_csr use_cvmx_usb_read_csr64_instead_of_cvmx_read_csr
#define cvmx_write_csr use_cvmx_usb_write_csr64_instead_of_cvmx_write_csr
typedef enum {
- __CVMX_USB_TRANSACTION_FLAGS_IN_USE = 1<<16,
+ __CVMX_USB_TRANSACTION_FLAGS_IN_USE = 1<<16,
} cvmx_usb_transaction_flags_t;
enum {
* transaction with a simple clearing of bit 0.
*/
typedef enum {
- CVMX_USB_STAGE_NON_CONTROL,
- CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE,
- CVMX_USB_STAGE_SETUP,
- CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE,
- CVMX_USB_STAGE_DATA,
- CVMX_USB_STAGE_DATA_SPLIT_COMPLETE,
- CVMX_USB_STAGE_STATUS,
- CVMX_USB_STAGE_STATUS_SPLIT_COMPLETE,
+ CVMX_USB_STAGE_NON_CONTROL,
+ CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE,
+ CVMX_USB_STAGE_SETUP,
+ CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE,
+ CVMX_USB_STAGE_DATA,
+ CVMX_USB_STAGE_DATA_SPLIT_COMPLETE,
+ CVMX_USB_STAGE_STATUS,
+ CVMX_USB_STAGE_STATUS_SPLIT_COMPLETE,
} cvmx_usb_stage_t;
/**
* of pending requests for a pipe.
*/
typedef struct cvmx_usb_transaction {
- struct cvmx_usb_transaction *prev; /**< Transaction before this one in the pipe */
- struct cvmx_usb_transaction *next; /**< Transaction after this one in the pipe */
- cvmx_usb_transfer_t type; /**< Type of transaction, duplicated of the pipe */
- cvmx_usb_transaction_flags_t flags; /**< State flags for this transaction */
- uint64_t buffer; /**< User's physical buffer address to read/write */
- int buffer_length; /**< Size of the user's buffer in bytes */
- uint64_t control_header; /**< For control transactions, physical address of the 8 byte standard header */
- int iso_start_frame; /**< For ISO transactions, the starting frame number */
- int iso_number_packets; /**< For ISO transactions, the number of packets in the request */
- cvmx_usb_iso_packet_t *iso_packets; /**< For ISO transactions, the sub packets in the request */
- int xfersize;
- int pktcnt;
- int retries;
- int actual_bytes; /**< Actual bytes transfer for this transaction */
- cvmx_usb_stage_t stage; /**< For control transactions, the current stage */
- cvmx_usb_callback_func_t callback; /**< User's callback function when complete */
- void *callback_data; /**< User's data */
+ struct cvmx_usb_transaction *prev; /**< Transaction before this one in the pipe */
+ struct cvmx_usb_transaction *next; /**< Transaction after this one in the pipe */
+ cvmx_usb_transfer_t type; /**< Type of transaction, duplicated of the pipe */
+ cvmx_usb_transaction_flags_t flags; /**< State flags for this transaction */
+ uint64_t buffer; /**< User's physical buffer address to read/write */
+ int buffer_length; /**< Size of the user's buffer in bytes */
+ uint64_t control_header; /**< For control transactions, physical address of the 8 byte standard header */
+ int iso_start_frame; /**< For ISO transactions, the starting frame number */
+ int iso_number_packets; /**< For ISO transactions, the number of packets in the request */
+ cvmx_usb_iso_packet_t *iso_packets; /**< For ISO transactions, the sub packets in the request */
+ int xfersize;
+ int pktcnt;
+ int retries;
+ int actual_bytes; /**< Actual bytes transfer for this transaction */
+ cvmx_usb_stage_t stage; /**< For control transactions, the current stage */
+ cvmx_usb_callback_func_t callback; /**< User's callback function when complete */
+ void *callback_data; /**< User's data */
} cvmx_usb_transaction_t;
/**
* USB device. It contains a list of pending request to the device.
*/
typedef struct cvmx_usb_pipe {
- struct cvmx_usb_pipe *prev; /**< Pipe before this one in the list */
- struct cvmx_usb_pipe *next; /**< Pipe after this one in the list */
- cvmx_usb_transaction_t *head; /**< The first pending transaction */
- cvmx_usb_transaction_t *tail; /**< The last pending transaction */
- uint64_t interval; /**< For periodic pipes, the interval between packets in frames */
- uint64_t next_tx_frame; /**< The next frame this pipe is allowed to transmit on */
- cvmx_usb_pipe_flags_t flags; /**< State flags for this pipe */
- cvmx_usb_speed_t device_speed; /**< Speed of device connected to this pipe */
- cvmx_usb_transfer_t transfer_type; /**< Type of transaction supported by this pipe */
- cvmx_usb_direction_t transfer_dir; /**< IN or OUT. Ignored for Control */
- int multi_count; /**< Max packet in a row for the device */
- uint16_t max_packet; /**< The device's maximum packet size in bytes */
- uint8_t device_addr; /**< USB device address at other end of pipe */
- uint8_t endpoint_num; /**< USB endpoint number at other end of pipe */
- uint8_t hub_device_addr; /**< Hub address this device is connected to */
- uint8_t hub_port; /**< Hub port this device is connected to */
- uint8_t pid_toggle; /**< This toggles between 0/1 on every packet send to track the data pid needed */
- uint8_t channel; /**< Hardware DMA channel for this pipe */
- int8_t split_sc_frame; /**< The low order bits of the frame number the split complete should be sent on */
+ struct cvmx_usb_pipe *prev; /**< Pipe before this one in the list */
+ struct cvmx_usb_pipe *next; /**< Pipe after this one in the list */
+ cvmx_usb_transaction_t *head; /**< The first pending transaction */
+ cvmx_usb_transaction_t *tail; /**< The last pending transaction */
+ uint64_t interval; /**< For periodic pipes, the interval between packets in frames */
+ uint64_t next_tx_frame; /**< The next frame this pipe is allowed to transmit on */
+ cvmx_usb_pipe_flags_t flags; /**< State flags for this pipe */
+ cvmx_usb_speed_t device_speed; /**< Speed of device connected to this pipe */
+ cvmx_usb_transfer_t transfer_type; /**< Type of transaction supported by this pipe */
+ cvmx_usb_direction_t transfer_dir; /**< IN or OUT. Ignored for Control */
+ int multi_count; /**< Max packet in a row for the device */
+ uint16_t max_packet; /**< The device's maximum packet size in bytes */
+ uint8_t device_addr; /**< USB device address at other end of pipe */
+ uint8_t endpoint_num; /**< USB endpoint number at other end of pipe */
+ uint8_t hub_device_addr; /**< Hub address this device is connected to */
+ uint8_t hub_port; /**< Hub port this device is connected to */
+ uint8_t pid_toggle; /**< This toggles between 0/1 on every packet send to track the data pid needed */
+ uint8_t channel; /**< Hardware DMA channel for this pipe */
+ int8_t split_sc_frame; /**< The low order bits of the frame number the split complete should be sent on */
} cvmx_usb_pipe_t;
typedef struct {
- cvmx_usb_pipe_t *head; /**< Head of the list, or NULL if empty */
- cvmx_usb_pipe_t *tail; /**< Tail if the list, or NULL if empty */
+ cvmx_usb_pipe_t *head; /**< Head of the list, or NULL if empty */
+ cvmx_usb_pipe_t *tail; /**< Tail if the list, or NULL if empty */
} cvmx_usb_pipe_list_t;
typedef struct {
- struct {
- int channel;
- int size;
- uint64_t address;
- } entry[MAX_CHANNELS+1];
- int head;
- int tail;
+ struct {
+ int channel;
+ int size;
+ uint64_t address;
+ } entry[MAX_CHANNELS+1];
+ int head;
+ int tail;
} cvmx_usb_tx_fifo_t;
/**
* The state of the USB block is stored in this structure
*/
typedef struct {
- int init_flags; /**< Flags passed to initialize */
- int index; /**< Which USB block this is for */
- int idle_hardware_channels; /**< Bit set for every idle hardware channel */
- cvmx_usbcx_hprt_t usbcx_hprt; /**< Stored port status so we don't need to read a CSR to determine splits */
- cvmx_usb_pipe_t *pipe_for_channel[MAX_CHANNELS]; /**< Map channels to pipes */
- cvmx_usb_transaction_t *free_transaction_head; /**< List of free transactions head */
- cvmx_usb_transaction_t *free_transaction_tail; /**< List of free transactions tail */
- cvmx_usb_pipe_t pipe[MAX_PIPES]; /**< Storage for pipes */
- cvmx_usb_transaction_t transaction[MAX_TRANSACTIONS]; /**< Storage for transactions */
- cvmx_usb_callback_func_t callback[__CVMX_USB_CALLBACK_END]; /**< User global callbacks */
- void *callback_data[__CVMX_USB_CALLBACK_END]; /**< User data for each callback */
- int indent; /**< Used by debug output to indent functions */
- cvmx_usb_port_status_t port_status; /**< Last port status used for change notification */
- cvmx_usb_pipe_list_t free_pipes; /**< List of all pipes that are currently closed */
- cvmx_usb_pipe_list_t idle_pipes; /**< List of open pipes that have no transactions */
- cvmx_usb_pipe_list_t active_pipes[4]; /**< Active pipes indexed by transfer type */
- uint64_t frame_number; /**< Increments every SOF interrupt for time keeping */
- cvmx_usb_transaction_t *active_split; /**< Points to the current active split, or NULL */
- cvmx_usb_tx_fifo_t periodic;
- cvmx_usb_tx_fifo_t nonperiodic;
+ int init_flags; /**< Flags passed to initialize */
+ int index; /**< Which USB block this is for */
+ int idle_hardware_channels; /**< Bit set for every idle hardware channel */
+ cvmx_usbcx_hprt_t usbcx_hprt; /**< Stored port status so we don't need to read a CSR to determine splits */
+ cvmx_usb_pipe_t *pipe_for_channel[MAX_CHANNELS]; /**< Map channels to pipes */
+ cvmx_usb_transaction_t *free_transaction_head; /**< List of free transactions head */
+ cvmx_usb_transaction_t *free_transaction_tail; /**< List of free transactions tail */
+ cvmx_usb_pipe_t pipe[MAX_PIPES]; /**< Storage for pipes */
+ cvmx_usb_transaction_t transaction[MAX_TRANSACTIONS]; /**< Storage for transactions */
+ cvmx_usb_callback_func_t callback[__CVMX_USB_CALLBACK_END]; /**< User global callbacks */
+ void *callback_data[__CVMX_USB_CALLBACK_END]; /**< User data for each callback */
+ int indent; /**< Used by debug output to indent functions */
+ cvmx_usb_port_status_t port_status; /**< Last port status used for change notification */
+ cvmx_usb_pipe_list_t free_pipes; /**< List of all pipes that are currently closed */
+ cvmx_usb_pipe_list_t idle_pipes; /**< List of open pipes that have no transactions */
+ cvmx_usb_pipe_list_t active_pipes[4]; /**< Active pipes indexed by transfer type */
+ uint64_t frame_number; /**< Increments every SOF interrupt for time keeping */
+ cvmx_usb_transaction_t *active_split; /**< Points to the current active split, or NULL */
+ cvmx_usb_tx_fifo_t periodic;
+ cvmx_usb_tx_fifo_t nonperiodic;
} cvmx_usb_internal_state_t;
/* This macro spins on a field waiting for it to reach a value */
#define CVMX_WAIT_FOR_FIELD32(address, type, field, op, value, timeout_usec)\
- ({int result; \
- do { \
- uint64_t done = cvmx_get_cycle() + (uint64_t)timeout_usec * \
- octeon_get_clock_rate() / 1000000; \
- type c; \
- while (1) \
- { \
- c.u32 = __cvmx_usb_read_csr32(usb, address); \
- if (c.s.field op (value)) { \
- result = 0; \
- break; \
- } else if (cvmx_get_cycle() > done) { \
- result = -1; \
- break; \
- } else \
- cvmx_wait(100); \
- } \
- } while (0); \
- result;})
+ ({int result; \
+ do { \
+ uint64_t done = cvmx_get_cycle() + (uint64_t)timeout_usec * \
+ octeon_get_clock_rate() / 1000000; \
+ type c; \
+ while (1) { \
+ c.u32 = __cvmx_usb_read_csr32(usb, address); \
+ if (c.s.field op (value)) { \
+ result = 0; \
+ break; \
+ } else if (cvmx_get_cycle() > done) { \
+ result = -1; \
+ break; \
+ } else \
+ cvmx_wait(100); \
+ } \
+ } while (0); \
+ result; })
/* This macro logically sets a single field in a CSR. It does the sequence
- read, modify, and write */
-#define USB_SET_FIELD32(address, type, field, value)\
- do { \
- type c; \
- c.u32 = __cvmx_usb_read_csr32(usb, address);\
- c.s.field = value; \
- __cvmx_usb_write_csr32(usb, address, c.u32);\
- } while (0)
+ read, modify, and write */
+#define USB_SET_FIELD32(address, type, field, value) \
+ do { \
+ type c; \
+ c.u32 = __cvmx_usb_read_csr32(usb, address); \
+ c.s.field = value; \
+ __cvmx_usb_write_csr32(usb, address, c.u32); \
+ } while (0)
/* Returns the IO address to push/pop stuff data from the FIFOs */
#define USB_FIFO_ADDRESS(channel, usb_index) (CVMX_USBCX_GOTGCTL(usb_index) + ((channel)+1)*0x1000)
* @return Result of the read
*/
static inline uint32_t __cvmx_usb_read_csr32(cvmx_usb_internal_state_t *usb,
- uint64_t address)
+ uint64_t address)
{
- uint32_t result = cvmx_read64_uint32(address ^ 4);
- return result;
+ uint32_t result = cvmx_read64_uint32(address ^ 4);
+ return result;
}
* @param value Value to write
*/
static inline void __cvmx_usb_write_csr32(cvmx_usb_internal_state_t *usb,
- uint64_t address, uint32_t value)
+ uint64_t address, uint32_t value)
{
- cvmx_write64_uint32(address ^ 4, value);
- cvmx_read64_uint64(CVMX_USBNX_DMA0_INB_CHN0(usb->index));
+ cvmx_write64_uint32(address ^ 4, value);
+ cvmx_read64_uint64(CVMX_USBNX_DMA0_INB_CHN0(usb->index));
}
* @return Result of the read
*/
static inline uint64_t __cvmx_usb_read_csr64(cvmx_usb_internal_state_t *usb,
- uint64_t address)
+ uint64_t address)
{
- uint64_t result = cvmx_read64_uint64(address);
- return result;
+ uint64_t result = cvmx_read64_uint64(address);
+ return result;
}
* @param value Value to write
*/
static inline void __cvmx_usb_write_csr64(cvmx_usb_internal_state_t *usb,
- uint64_t address, uint64_t value)
+ uint64_t address, uint64_t value)
{
- cvmx_write64_uint64(address, value);
+ cvmx_write64_uint64(address, value);
}
/**
*/
static inline int __cvmx_usb_pipe_needs_split(cvmx_usb_internal_state_t *usb, cvmx_usb_pipe_t *pipe)
{
- return ((pipe->device_speed != CVMX_USB_SPEED_HIGH) && (usb->usbcx_hprt.s.prtspd == CVMX_USB_SPEED_HIGH));
+ return ((pipe->device_speed != CVMX_USB_SPEED_HIGH) && (usb->usbcx_hprt.s.prtspd == CVMX_USB_SPEED_HIGH));
}
*/
static inline int __cvmx_usb_get_data_pid(cvmx_usb_pipe_t *pipe)
{
- if (pipe->pid_toggle)
- return 2; /* Data1 */
- else
- return 0; /* Data0 */
+ if (pipe->pid_toggle)
+ return 2; /* Data1 */
+ else
+ return 0; /* Data0 */
}
*/
int cvmx_usb_get_num_ports(void)
{
- int arch_ports = 0;
-
- if (OCTEON_IS_MODEL(OCTEON_CN56XX))
- arch_ports = 1;
- else if (OCTEON_IS_MODEL(OCTEON_CN52XX))
- arch_ports = 2;
- else if (OCTEON_IS_MODEL(OCTEON_CN50XX))
- arch_ports = 1;
- else if (OCTEON_IS_MODEL(OCTEON_CN31XX))
- arch_ports = 1;
- else if (OCTEON_IS_MODEL(OCTEON_CN30XX))
- arch_ports = 1;
- else
- arch_ports = 0;
-
- return arch_ports;
+ int arch_ports = 0;
+
+ if (OCTEON_IS_MODEL(OCTEON_CN56XX))
+ arch_ports = 1;
+ else if (OCTEON_IS_MODEL(OCTEON_CN52XX))
+ arch_ports = 2;
+ else if (OCTEON_IS_MODEL(OCTEON_CN50XX))
+ arch_ports = 1;
+ else if (OCTEON_IS_MODEL(OCTEON_CN31XX))
+ arch_ports = 1;
+ else if (OCTEON_IS_MODEL(OCTEON_CN30XX))
+ arch_ports = 1;
+ else
+ arch_ports = 0;
+
+ return arch_ports;
}
* @INTERNAL
* Allocate a usb transaction for use
*
- * @param usb USB device state populated by
- * cvmx_usb_initialize().
+ * @param usb USB device state populated by
+ * cvmx_usb_initialize().
*
* @return Transaction or NULL
*/
static inline cvmx_usb_transaction_t *__cvmx_usb_alloc_transaction(cvmx_usb_internal_state_t *usb)
{
- cvmx_usb_transaction_t *t;
- t = usb->free_transaction_head;
- if (t) {
- usb->free_transaction_head = t->next;
- if (!usb->free_transaction_head)
- usb->free_transaction_tail = NULL;
- }
- if (t) {
- memset(t, 0, sizeof(*t));
- t->flags = __CVMX_USB_TRANSACTION_FLAGS_IN_USE;
- }
- return t;
+ cvmx_usb_transaction_t *t;
+ t = usb->free_transaction_head;
+ if (t) {
+ usb->free_transaction_head = t->next;
+ if (!usb->free_transaction_head)
+ usb->free_transaction_tail = NULL;
+ }
+ if (t) {
+ memset(t, 0, sizeof(*t));
+ t->flags = __CVMX_USB_TRANSACTION_FLAGS_IN_USE;
+ }
+ return t;
}
* @INTERNAL
* Free a usb transaction
*
- * @param usb USB device state populated by
- * cvmx_usb_initialize().
+ * @param usb USB device state populated by
+ * cvmx_usb_initialize().
* @param transaction
- * Transaction to free
+ * Transaction to free
*/
static inline void __cvmx_usb_free_transaction(cvmx_usb_internal_state_t *usb,
- cvmx_usb_transaction_t *transaction)
+ cvmx_usb_transaction_t *transaction)
{
- transaction->flags = 0;
- transaction->prev = NULL;
- transaction->next = NULL;
- if (usb->free_transaction_tail)
- usb->free_transaction_tail->next = transaction;
- else
- usb->free_transaction_head = transaction;
- usb->free_transaction_tail = transaction;
+ transaction->flags = 0;
+ transaction->prev = NULL;
+ transaction->next = NULL;
+ if (usb->free_transaction_tail)
+ usb->free_transaction_tail->next = transaction;
+ else
+ usb->free_transaction_head = transaction;
+ usb->free_transaction_tail = transaction;
}
*/
static inline void __cvmx_usb_append_pipe(cvmx_usb_pipe_list_t *list, cvmx_usb_pipe_t *pipe)
{
- pipe->next = NULL;
- pipe->prev = list->tail;
- if (list->tail)
- list->tail->next = pipe;
- else
- list->head = pipe;
- list->tail = pipe;
+ pipe->next = NULL;
+ pipe->prev = list->tail;
+ if (list->tail)
+ list->tail->next = pipe;
+ else
+ list->head = pipe;
+ list->tail = pipe;
}
*/
static inline void __cvmx_usb_remove_pipe(cvmx_usb_pipe_list_t *list, cvmx_usb_pipe_t *pipe)
{
- if (list->head == pipe) {
- list->head = pipe->next;
- pipe->next = NULL;
- if (list->head)
- list->head->prev = NULL;
- else
- list->tail = NULL;
- }
- else if (list->tail == pipe) {
- list->tail = pipe->prev;
- list->tail->next = NULL;
- pipe->prev = NULL;
- }
- else {
- pipe->prev->next = pipe->next;
- pipe->next->prev = pipe->prev;
- pipe->prev = NULL;
- pipe->next = NULL;
- }
+ if (list->head == pipe) {
+ list->head = pipe->next;
+ pipe->next = NULL;
+ if (list->head)
+ list->head->prev = NULL;
+ else
+ list->tail = NULL;
+ } else if (list->tail == pipe) {
+ list->tail = pipe->prev;
+ list->tail->next = NULL;
+ pipe->prev = NULL;
+ } else {
+ pipe->prev->next = pipe->next;
+ pipe->next->prev = pipe->prev;
+ pipe->prev = NULL;
+ pipe->next = NULL;
+ }
}
* off in the disabled state.
*
* @param state Pointer to an empty cvmx_usb_state_t structure
- * that will be populated by the initialize call.
- * This structure is then passed to all other USB
- * functions.
+ * that will be populated by the initialize call.
+ * This structure is then passed to all other USB
+ * functions.
* @param usb_port_number
- * Which Octeon USB port to initialize.
+ * Which Octeon USB port to initialize.
* @param flags Flags to control hardware initialization. See
- * cvmx_usb_initialize_flags_t for the flag
- * definitions. Some flags are mandatory.
+ * cvmx_usb_initialize_flags_t for the flag
+ * definitions. Some flags are mandatory.
*
* @return 0 or a negative error code.
*/
int cvmx_usb_initialize(cvmx_usb_state_t *state, int usb_port_number,
cvmx_usb_initialize_flags_t flags)
{
- cvmx_usbnx_clk_ctl_t usbn_clk_ctl;
- cvmx_usbnx_usbp_ctl_status_t usbn_usbp_ctl_status;
- cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t*)state;
-
- usb->init_flags = flags;
-
- /* Make sure that state is large enough to store the internal state */
- if (sizeof(*state) < sizeof(*usb))
- return -EINVAL;
- /* At first allow 0-1 for the usb port number */
- if ((usb_port_number < 0) || (usb_port_number > 1))
- return -EINVAL;
- /* For all chips except 52XX there is only one port */
- if (!OCTEON_IS_MODEL(OCTEON_CN52XX) && (usb_port_number > 0))
- return -EINVAL;
- /* Try to determine clock type automatically */
- if ((flags & (CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_XI |
- CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_GND)) == 0) {
- if (octeon_usb_get_clock_type() == USB_CLOCK_TYPE_CRYSTAL_12)
- flags |= CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_XI; /* Only 12 MHZ crystals are supported */
- else
- flags |= CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_GND;
- }
-
- if (flags & CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_GND) {
- /* Check for auto ref clock frequency */
- if (!(flags & CVMX_USB_INITIALIZE_FLAGS_CLOCK_MHZ_MASK))
- switch (octeon_usb_get_clock_type()) {
- case USB_CLOCK_TYPE_REF_12:
- flags |= CVMX_USB_INITIALIZE_FLAGS_CLOCK_12MHZ;
- break;
- case USB_CLOCK_TYPE_REF_24:
- flags |= CVMX_USB_INITIALIZE_FLAGS_CLOCK_24MHZ;
- break;
- case USB_CLOCK_TYPE_REF_48:
- flags |= CVMX_USB_INITIALIZE_FLAGS_CLOCK_48MHZ;
- break;
- default:
- return -EINVAL;
- break;
- }
- }
-
- memset(usb, 0, sizeof(usb));
- usb->init_flags = flags;
-
- /* Initialize the USB state structure */
- {
- int i;
- usb->index = usb_port_number;
-
- /* Initialize the transaction double linked list */
- usb->free_transaction_head = NULL;
- usb->free_transaction_tail = NULL;
- for (i=0; i<MAX_TRANSACTIONS; i++)
- __cvmx_usb_free_transaction(usb, usb->transaction + i);
- for (i=0; i<MAX_PIPES; i++)
- __cvmx_usb_append_pipe(&usb->free_pipes, usb->pipe + i);
- }
-
- /* Power On Reset and PHY Initialization */
-
- /* 1. Wait for DCOK to assert (nothing to do) */
- /* 2a. Write USBN0/1_CLK_CTL[POR] = 1 and
- USBN0/1_CLK_CTL[HRST,PRST,HCLK_RST] = 0 */
- usbn_clk_ctl.u64 = __cvmx_usb_read_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index));
- usbn_clk_ctl.s.por = 1;
- usbn_clk_ctl.s.hrst = 0;
- usbn_clk_ctl.s.prst = 0;
- usbn_clk_ctl.s.hclk_rst = 0;
- usbn_clk_ctl.s.enable = 0;
- /* 2b. Select the USB reference clock/crystal parameters by writing
- appropriate values to USBN0/1_CLK_CTL[P_C_SEL, P_RTYPE, P_COM_ON] */
- if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_GND) {
- /* The USB port uses 12/24/48MHz 2.5V board clock
- source at USB_XO. USB_XI should be tied to GND.
- Most Octeon evaluation boards require this setting */
- if (OCTEON_IS_MODEL(OCTEON_CN3XXX)) {
- usbn_clk_ctl.cn31xx.p_rclk = 1; /* From CN31XX,CN30XX manual */
- usbn_clk_ctl.cn31xx.p_xenbn = 0;
- }
- else if (OCTEON_IS_MODEL(OCTEON_CN56XX) || OCTEON_IS_MODEL(OCTEON_CN50XX))
- usbn_clk_ctl.cn56xx.p_rtype = 2; /* From CN56XX,CN50XX manual */
- else
- usbn_clk_ctl.cn52xx.p_rtype = 1; /* From CN52XX manual */
-
- switch (flags & CVMX_USB_INITIALIZE_FLAGS_CLOCK_MHZ_MASK) {
- case CVMX_USB_INITIALIZE_FLAGS_CLOCK_12MHZ:
- usbn_clk_ctl.s.p_c_sel = 0;
- break;
- case CVMX_USB_INITIALIZE_FLAGS_CLOCK_24MHZ:
- usbn_clk_ctl.s.p_c_sel = 1;
- break;
- case CVMX_USB_INITIALIZE_FLAGS_CLOCK_48MHZ:
- usbn_clk_ctl.s.p_c_sel = 2;
- break;
- }
- }
- else {
- /* The USB port uses a 12MHz crystal as clock source
- at USB_XO and USB_XI */
- if (OCTEON_IS_MODEL(OCTEON_CN3XXX)) {
- usbn_clk_ctl.cn31xx.p_rclk = 1; /* From CN31XX,CN30XX manual */
- usbn_clk_ctl.cn31xx.p_xenbn = 1;
- }
- else if (OCTEON_IS_MODEL(OCTEON_CN56XX) || OCTEON_IS_MODEL(OCTEON_CN50XX))
- usbn_clk_ctl.cn56xx.p_rtype = 0; /* From CN56XX,CN50XX manual */
- else
- usbn_clk_ctl.cn52xx.p_rtype = 0; /* From CN52XX manual */
-
- usbn_clk_ctl.s.p_c_sel = 0;
- }
- /* 2c. Select the HCLK via writing USBN0/1_CLK_CTL[DIVIDE, DIVIDE2] and
- setting USBN0/1_CLK_CTL[ENABLE] = 1. Divide the core clock down such
- that USB is as close as possible to 125Mhz */
- {
- int divisor = (octeon_get_clock_rate()+125000000-1)/125000000;
- if (divisor < 4) /* Lower than 4 doesn't seem to work properly */
- divisor = 4;
- usbn_clk_ctl.s.divide = divisor;
- usbn_clk_ctl.s.divide2 = 0;
- }
- __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index),
- usbn_clk_ctl.u64);
- /* 2d. Write USBN0/1_CLK_CTL[HCLK_RST] = 1 */
- usbn_clk_ctl.s.hclk_rst = 1;
- __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index),
- usbn_clk_ctl.u64);
- /* 2e. Wait 64 core-clock cycles for HCLK to stabilize */
- cvmx_wait(64);
- /* 3. Program the power-on reset field in the USBN clock-control register:
- USBN_CLK_CTL[POR] = 0 */
- usbn_clk_ctl.s.por = 0;
- __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index),
- usbn_clk_ctl.u64);
- /* 4. Wait 1 ms for PHY clock to start */
- mdelay(1);
- /* 5. Program the Reset input from automatic test equipment field in the
- USBP control and status register: USBN_USBP_CTL_STATUS[ATE_RESET] = 1 */
- usbn_usbp_ctl_status.u64 = __cvmx_usb_read_csr64(usb, CVMX_USBNX_USBP_CTL_STATUS(usb->index));
- usbn_usbp_ctl_status.s.ate_reset = 1;
- __cvmx_usb_write_csr64(usb, CVMX_USBNX_USBP_CTL_STATUS(usb->index),
- usbn_usbp_ctl_status.u64);
- /* 6. Wait 10 cycles */
- cvmx_wait(10);
- /* 7. Clear ATE_RESET field in the USBN clock-control register:
- USBN_USBP_CTL_STATUS[ATE_RESET] = 0 */
- usbn_usbp_ctl_status.s.ate_reset = 0;
- __cvmx_usb_write_csr64(usb, CVMX_USBNX_USBP_CTL_STATUS(usb->index),
- usbn_usbp_ctl_status.u64);
- /* 8. Program the PHY reset field in the USBN clock-control register:
- USBN_CLK_CTL[PRST] = 1 */
- usbn_clk_ctl.s.prst = 1;
- __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index),
- usbn_clk_ctl.u64);
- /* 9. Program the USBP control and status register to select host or
- device mode. USBN_USBP_CTL_STATUS[HST_MODE] = 0 for host, = 1 for
- device */
- usbn_usbp_ctl_status.s.hst_mode = 0;
- __cvmx_usb_write_csr64(usb, CVMX_USBNX_USBP_CTL_STATUS(usb->index),
- usbn_usbp_ctl_status.u64);
- /* 10. Wait 1 us */
- udelay(1);
- /* 11. Program the hreset_n field in the USBN clock-control register:
- USBN_CLK_CTL[HRST] = 1 */
- usbn_clk_ctl.s.hrst = 1;
- __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index),
- usbn_clk_ctl.u64);
- /* 12. Proceed to USB core initialization */
- usbn_clk_ctl.s.enable = 1;
- __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index),
- usbn_clk_ctl.u64);
- udelay(1);
-
- /* USB Core Initialization */
-
- /* 1. Read USBC_GHWCFG1, USBC_GHWCFG2, USBC_GHWCFG3, USBC_GHWCFG4 to
- determine USB core configuration parameters. */
- /* Nothing needed */
- /* 2. Program the following fields in the global AHB configuration
- register (USBC_GAHBCFG)
- DMA mode, USBC_GAHBCFG[DMAEn]: 1 = DMA mode, 0 = slave mode
- Burst length, USBC_GAHBCFG[HBSTLEN] = 0
- Nonperiodic TxFIFO empty level (slave mode only),
- USBC_GAHBCFG[NPTXFEMPLVL]
- Periodic TxFIFO empty level (slave mode only),
- USBC_GAHBCFG[PTXFEMPLVL]
- Global interrupt mask, USBC_GAHBCFG[GLBLINTRMSK] = 1 */
- {
- cvmx_usbcx_gahbcfg_t usbcx_gahbcfg;
- /* Due to an errata, CN31XX doesn't support DMA */
- if (OCTEON_IS_MODEL(OCTEON_CN31XX))
- usb->init_flags |= CVMX_USB_INITIALIZE_FLAGS_NO_DMA;
- usbcx_gahbcfg.u32 = 0;
- usbcx_gahbcfg.s.dmaen = !(usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA);
- if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA)
- usb->idle_hardware_channels = 0x1; /* Only use one channel with non DMA */
- else if (OCTEON_IS_MODEL(OCTEON_CN5XXX))
- usb->idle_hardware_channels = 0xf7; /* CN5XXX have an errata with channel 3 */
- else
- usb->idle_hardware_channels = 0xff;
- usbcx_gahbcfg.s.hbstlen = 0;
- usbcx_gahbcfg.s.nptxfemplvl = 1;
- usbcx_gahbcfg.s.ptxfemplvl = 1;
- usbcx_gahbcfg.s.glblintrmsk = 1;
- __cvmx_usb_write_csr32(usb, CVMX_USBCX_GAHBCFG(usb->index),
- usbcx_gahbcfg.u32);
- }
- /* 3. Program the following fields in USBC_GUSBCFG register.
- HS/FS timeout calibration, USBC_GUSBCFG[TOUTCAL] = 0
- ULPI DDR select, USBC_GUSBCFG[DDRSEL] = 0
- USB turnaround time, USBC_GUSBCFG[USBTRDTIM] = 0x5
- PHY low-power clock select, USBC_GUSBCFG[PHYLPWRCLKSEL] = 0 */
- {
- cvmx_usbcx_gusbcfg_t usbcx_gusbcfg;
- usbcx_gusbcfg.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GUSBCFG(usb->index));
- usbcx_gusbcfg.s.toutcal = 0;
- usbcx_gusbcfg.s.ddrsel = 0;
- usbcx_gusbcfg.s.usbtrdtim = 0x5;
- usbcx_gusbcfg.s.phylpwrclksel = 0;
- __cvmx_usb_write_csr32(usb, CVMX_USBCX_GUSBCFG(usb->index),
- usbcx_gusbcfg.u32);
- }
- /* 4. The software must unmask the following bits in the USBC_GINTMSK
- register.
- OTG interrupt mask, USBC_GINTMSK[OTGINTMSK] = 1
- Mode mismatch interrupt mask, USBC_GINTMSK[MODEMISMSK] = 1 */
- {
- cvmx_usbcx_gintmsk_t usbcx_gintmsk;
- int channel;
-
- usbcx_gintmsk.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GINTMSK(usb->index));
- usbcx_gintmsk.s.otgintmsk = 1;
- usbcx_gintmsk.s.modemismsk = 1;
- usbcx_gintmsk.s.hchintmsk = 1;
- usbcx_gintmsk.s.sofmsk = 0;
- /* We need RX FIFO interrupts if we don't have DMA */
- if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA)
- usbcx_gintmsk.s.rxflvlmsk = 1;
- __cvmx_usb_write_csr32(usb, CVMX_USBCX_GINTMSK(usb->index),
- usbcx_gintmsk.u32);
-
- /* Disable all channel interrupts. We'll enable them per channel later */
- for (channel=0; channel<8; channel++)
- __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCINTMSKX(channel, usb->index), 0);
- }
-
- {
- /* Host Port Initialization */
-
- /* 1. Program the host-port interrupt-mask field to unmask,
- USBC_GINTMSK[PRTINT] = 1 */
- USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), cvmx_usbcx_gintmsk_t,
- prtintmsk, 1);
- USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), cvmx_usbcx_gintmsk_t,
- disconnintmsk, 1);
- /* 2. Program the USBC_HCFG register to select full-speed host or
- high-speed host. */
- {
- cvmx_usbcx_hcfg_t usbcx_hcfg;
- usbcx_hcfg.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCFG(usb->index));
- usbcx_hcfg.s.fslssupp = 0;
- usbcx_hcfg.s.fslspclksel = 0;
- __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCFG(usb->index), usbcx_hcfg.u32);
- }
- /* 3. Program the port power bit to drive VBUS on the USB,
- USBC_HPRT[PRTPWR] = 1 */
- USB_SET_FIELD32(CVMX_USBCX_HPRT(usb->index), cvmx_usbcx_hprt_t, prtpwr, 1);
-
- /* Steps 4-15 from the manual are done later in the port enable */
- }
-
- return 0;
+ cvmx_usbnx_clk_ctl_t usbn_clk_ctl;
+ cvmx_usbnx_usbp_ctl_status_t usbn_usbp_ctl_status;
+ cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t *)state;
+
+ usb->init_flags = flags;
+
+ /* Make sure that state is large enough to store the internal state */
+ if (sizeof(*state) < sizeof(*usb))
+ return -EINVAL;
+ /* At first allow 0-1 for the usb port number */
+ if ((usb_port_number < 0) || (usb_port_number > 1))
+ return -EINVAL;
+ /* For all chips except 52XX there is only one port */
+ if (!OCTEON_IS_MODEL(OCTEON_CN52XX) && (usb_port_number > 0))
+ return -EINVAL;
+ /* Try to determine clock type automatically */
+ if ((flags & (CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_XI |
+ CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_GND)) == 0) {
+ if (octeon_usb_get_clock_type() == USB_CLOCK_TYPE_CRYSTAL_12)
+ flags |= CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_XI; /* Only 12 MHZ crystals are supported */
+ else
+ flags |= CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_GND;
+ }
+
+ if (flags & CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_GND) {
+ /* Check for auto ref clock frequency */
+ if (!(flags & CVMX_USB_INITIALIZE_FLAGS_CLOCK_MHZ_MASK))
+ switch (octeon_usb_get_clock_type()) {
+ case USB_CLOCK_TYPE_REF_12:
+ flags |= CVMX_USB_INITIALIZE_FLAGS_CLOCK_12MHZ;
+ break;
+ case USB_CLOCK_TYPE_REF_24:
+ flags |= CVMX_USB_INITIALIZE_FLAGS_CLOCK_24MHZ;
+ break;
+ case USB_CLOCK_TYPE_REF_48:
+ flags |= CVMX_USB_INITIALIZE_FLAGS_CLOCK_48MHZ;
+ break;
+ default:
+ return -EINVAL;
+ break;
+ }
+ }
+
+ memset(usb, 0, sizeof(usb));
+ usb->init_flags = flags;
+
+ /* Initialize the USB state structure */
+ {
+ int i;
+ usb->index = usb_port_number;
+
+ /* Initialize the transaction double linked list */
+ usb->free_transaction_head = NULL;
+ usb->free_transaction_tail = NULL;
+ for (i = 0; i < MAX_TRANSACTIONS; i++)
+ __cvmx_usb_free_transaction(usb, usb->transaction + i);
+ for (i = 0; i < MAX_PIPES; i++)
+ __cvmx_usb_append_pipe(&usb->free_pipes, usb->pipe + i);
+ }
+
+ /* Power On Reset and PHY Initialization */
+
+ /* 1. Wait for DCOK to assert (nothing to do) */
+ /* 2a. Write USBN0/1_CLK_CTL[POR] = 1 and
+ USBN0/1_CLK_CTL[HRST,PRST,HCLK_RST] = 0 */
+ usbn_clk_ctl.u64 = __cvmx_usb_read_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index));
+ usbn_clk_ctl.s.por = 1;
+ usbn_clk_ctl.s.hrst = 0;
+ usbn_clk_ctl.s.prst = 0;
+ usbn_clk_ctl.s.hclk_rst = 0;
+ usbn_clk_ctl.s.enable = 0;
+ /* 2b. Select the USB reference clock/crystal parameters by writing
+ appropriate values to USBN0/1_CLK_CTL[P_C_SEL, P_RTYPE, P_COM_ON] */
+ if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_GND) {
+ /* The USB port uses 12/24/48MHz 2.5V board clock
+ source at USB_XO. USB_XI should be tied to GND.
+ Most Octeon evaluation boards require this setting */
+ if (OCTEON_IS_MODEL(OCTEON_CN3XXX)) {
+ usbn_clk_ctl.cn31xx.p_rclk = 1; /* From CN31XX,CN30XX manual */
+ usbn_clk_ctl.cn31xx.p_xenbn = 0;
+ } else if (OCTEON_IS_MODEL(OCTEON_CN56XX) || OCTEON_IS_MODEL(OCTEON_CN50XX))
+ usbn_clk_ctl.cn56xx.p_rtype = 2; /* From CN56XX,CN50XX manual */
+ else
+ usbn_clk_ctl.cn52xx.p_rtype = 1; /* From CN52XX manual */
+
+ switch (flags & CVMX_USB_INITIALIZE_FLAGS_CLOCK_MHZ_MASK) {
+ case CVMX_USB_INITIALIZE_FLAGS_CLOCK_12MHZ:
+ usbn_clk_ctl.s.p_c_sel = 0;
+ break;
+ case CVMX_USB_INITIALIZE_FLAGS_CLOCK_24MHZ:
+ usbn_clk_ctl.s.p_c_sel = 1;
+ break;
+ case CVMX_USB_INITIALIZE_FLAGS_CLOCK_48MHZ:
+ usbn_clk_ctl.s.p_c_sel = 2;
+ break;
+ }
+ } else {
+ /* The USB port uses a 12MHz crystal as clock source
+ at USB_XO and USB_XI */
+ if (OCTEON_IS_MODEL(OCTEON_CN3XXX)) {
+ usbn_clk_ctl.cn31xx.p_rclk = 1; /* From CN31XX,CN30XX manual */
+ usbn_clk_ctl.cn31xx.p_xenbn = 1;
+ } else if (OCTEON_IS_MODEL(OCTEON_CN56XX) || OCTEON_IS_MODEL(OCTEON_CN50XX))
+ usbn_clk_ctl.cn56xx.p_rtype = 0; /* From CN56XX,CN50XX manual */
+ else
+ usbn_clk_ctl.cn52xx.p_rtype = 0; /* From CN52XX manual */
+
+ usbn_clk_ctl.s.p_c_sel = 0;
+ }
+ /* 2c. Select the HCLK via writing USBN0/1_CLK_CTL[DIVIDE, DIVIDE2] and
+ setting USBN0/1_CLK_CTL[ENABLE] = 1. Divide the core clock down such
+ that USB is as close as possible to 125Mhz */
+ {
+ int divisor = (octeon_get_clock_rate()+125000000-1)/125000000;
+ if (divisor < 4) /* Lower than 4 doesn't seem to work properly */
+ divisor = 4;
+ usbn_clk_ctl.s.divide = divisor;
+ usbn_clk_ctl.s.divide2 = 0;
+ }
+ __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index),
+ usbn_clk_ctl.u64);
+ /* 2d. Write USBN0/1_CLK_CTL[HCLK_RST] = 1 */
+ usbn_clk_ctl.s.hclk_rst = 1;
+ __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index),
+ usbn_clk_ctl.u64);
+ /* 2e. Wait 64 core-clock cycles for HCLK to stabilize */
+ cvmx_wait(64);
+ /* 3. Program the power-on reset field in the USBN clock-control register:
+ USBN_CLK_CTL[POR] = 0 */
+ usbn_clk_ctl.s.por = 0;
+ __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index),
+ usbn_clk_ctl.u64);
+ /* 4. Wait 1 ms for PHY clock to start */
+ mdelay(1);
+ /* 5. Program the Reset input from automatic test equipment field in the
+ USBP control and status register: USBN_USBP_CTL_STATUS[ATE_RESET] = 1 */
+ usbn_usbp_ctl_status.u64 = __cvmx_usb_read_csr64(usb, CVMX_USBNX_USBP_CTL_STATUS(usb->index));
+ usbn_usbp_ctl_status.s.ate_reset = 1;
+ __cvmx_usb_write_csr64(usb, CVMX_USBNX_USBP_CTL_STATUS(usb->index),
+ usbn_usbp_ctl_status.u64);
+ /* 6. Wait 10 cycles */
+ cvmx_wait(10);
+ /* 7. Clear ATE_RESET field in the USBN clock-control register:
+ USBN_USBP_CTL_STATUS[ATE_RESET] = 0 */
+ usbn_usbp_ctl_status.s.ate_reset = 0;
+ __cvmx_usb_write_csr64(usb, CVMX_USBNX_USBP_CTL_STATUS(usb->index),
+ usbn_usbp_ctl_status.u64);
+ /* 8. Program the PHY reset field in the USBN clock-control register:
+ USBN_CLK_CTL[PRST] = 1 */
+ usbn_clk_ctl.s.prst = 1;
+ __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index),
+ usbn_clk_ctl.u64);
+ /* 9. Program the USBP control and status register to select host or
+ device mode. USBN_USBP_CTL_STATUS[HST_MODE] = 0 for host, = 1 for
+ device */
+ usbn_usbp_ctl_status.s.hst_mode = 0;
+ __cvmx_usb_write_csr64(usb, CVMX_USBNX_USBP_CTL_STATUS(usb->index),
+ usbn_usbp_ctl_status.u64);
+ /* 10. Wait 1 us */
+ udelay(1);
+ /* 11. Program the hreset_n field in the USBN clock-control register:
+ USBN_CLK_CTL[HRST] = 1 */
+ usbn_clk_ctl.s.hrst = 1;
+ __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index),
+ usbn_clk_ctl.u64);
+ /* 12. Proceed to USB core initialization */
+ usbn_clk_ctl.s.enable = 1;
+ __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index),
+ usbn_clk_ctl.u64);
+ udelay(1);
+
+ /* USB Core Initialization */
+
+ /* 1. Read USBC_GHWCFG1, USBC_GHWCFG2, USBC_GHWCFG3, USBC_GHWCFG4 to
+ determine USB core configuration parameters. */
+ /* Nothing needed */
+ /* 2. Program the following fields in the global AHB configuration
+ register (USBC_GAHBCFG)
+ DMA mode, USBC_GAHBCFG[DMAEn]: 1 = DMA mode, 0 = slave mode
+ Burst length, USBC_GAHBCFG[HBSTLEN] = 0
+ Nonperiodic TxFIFO empty level (slave mode only),
+ USBC_GAHBCFG[NPTXFEMPLVL]
+ Periodic TxFIFO empty level (slave mode only),
+ USBC_GAHBCFG[PTXFEMPLVL]
+ Global interrupt mask, USBC_GAHBCFG[GLBLINTRMSK] = 1 */
+ {
+ cvmx_usbcx_gahbcfg_t usbcx_gahbcfg;
+ /* Due to an errata, CN31XX doesn't support DMA */
+ if (OCTEON_IS_MODEL(OCTEON_CN31XX))
+ usb->init_flags |= CVMX_USB_INITIALIZE_FLAGS_NO_DMA;
+ usbcx_gahbcfg.u32 = 0;
+ usbcx_gahbcfg.s.dmaen = !(usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA);
+ if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA)
+ usb->idle_hardware_channels = 0x1; /* Only use one channel with non DMA */
+ else if (OCTEON_IS_MODEL(OCTEON_CN5XXX))
+ usb->idle_hardware_channels = 0xf7; /* CN5XXX have an errata with channel 3 */
+ else
+ usb->idle_hardware_channels = 0xff;
+ usbcx_gahbcfg.s.hbstlen = 0;
+ usbcx_gahbcfg.s.nptxfemplvl = 1;
+ usbcx_gahbcfg.s.ptxfemplvl = 1;
+ usbcx_gahbcfg.s.glblintrmsk = 1;
+ __cvmx_usb_write_csr32(usb, CVMX_USBCX_GAHBCFG(usb->index),
+ usbcx_gahbcfg.u32);
+ }
+ /* 3. Program the following fields in USBC_GUSBCFG register.
+ HS/FS timeout calibration, USBC_GUSBCFG[TOUTCAL] = 0
+ ULPI DDR select, USBC_GUSBCFG[DDRSEL] = 0
+ USB turnaround time, USBC_GUSBCFG[USBTRDTIM] = 0x5
+ PHY low-power clock select, USBC_GUSBCFG[PHYLPWRCLKSEL] = 0 */
+ {
+ cvmx_usbcx_gusbcfg_t usbcx_gusbcfg;
+ usbcx_gusbcfg.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GUSBCFG(usb->index));
+ usbcx_gusbcfg.s.toutcal = 0;
+ usbcx_gusbcfg.s.ddrsel = 0;
+ usbcx_gusbcfg.s.usbtrdtim = 0x5;
+ usbcx_gusbcfg.s.phylpwrclksel = 0;
+ __cvmx_usb_write_csr32(usb, CVMX_USBCX_GUSBCFG(usb->index),
+ usbcx_gusbcfg.u32);
+ }
+ /* 4. The software must unmask the following bits in the USBC_GINTMSK
+ register.
+ OTG interrupt mask, USBC_GINTMSK[OTGINTMSK] = 1
+ Mode mismatch interrupt mask, USBC_GINTMSK[MODEMISMSK] = 1 */
+ {
+ cvmx_usbcx_gintmsk_t usbcx_gintmsk;
+ int channel;
+
+ usbcx_gintmsk.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GINTMSK(usb->index));
+ usbcx_gintmsk.s.otgintmsk = 1;
+ usbcx_gintmsk.s.modemismsk = 1;
+ usbcx_gintmsk.s.hchintmsk = 1;
+ usbcx_gintmsk.s.sofmsk = 0;
+ /* We need RX FIFO interrupts if we don't have DMA */
+ if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA)
+ usbcx_gintmsk.s.rxflvlmsk = 1;
+ __cvmx_usb_write_csr32(usb, CVMX_USBCX_GINTMSK(usb->index),
+ usbcx_gintmsk.u32);
+
+ /* Disable all channel interrupts. We'll enable them per channel later */
+ for (channel = 0; channel < 8; channel++)
+ __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCINTMSKX(channel, usb->index), 0);
+ }
+
+ {
+ /* Host Port Initialization */
+
+ /* 1. Program the host-port interrupt-mask field to unmask,
+ USBC_GINTMSK[PRTINT] = 1 */
+ USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), cvmx_usbcx_gintmsk_t,
+ prtintmsk, 1);
+ USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), cvmx_usbcx_gintmsk_t,
+ disconnintmsk, 1);
+ /* 2. Program the USBC_HCFG register to select full-speed host or
+ high-speed host. */
+ {
+ cvmx_usbcx_hcfg_t usbcx_hcfg;
+ usbcx_hcfg.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCFG(usb->index));
+ usbcx_hcfg.s.fslssupp = 0;
+ usbcx_hcfg.s.fslspclksel = 0;
+ __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCFG(usb->index), usbcx_hcfg.u32);
+ }
+ /* 3. Program the port power bit to drive VBUS on the USB,
+ USBC_HPRT[PRTPWR] = 1 */
+ USB_SET_FIELD32(CVMX_USBCX_HPRT(usb->index), cvmx_usbcx_hprt_t, prtpwr, 1);
+
+ /* Steps 4-15 from the manual are done later in the port enable */
+ }
+
+ return 0;
}
* function is called.
*
* @param state USB device state populated by
- * cvmx_usb_initialize().
+ * cvmx_usb_initialize().
*
* @return 0 or a negative error code.
*/
int cvmx_usb_shutdown(cvmx_usb_state_t *state)
{
- cvmx_usbnx_clk_ctl_t usbn_clk_ctl;
- cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t*)state;
-
- /* Make sure all pipes are closed */
- if (usb->idle_pipes.head ||
- usb->active_pipes[CVMX_USB_TRANSFER_ISOCHRONOUS].head ||
- usb->active_pipes[CVMX_USB_TRANSFER_INTERRUPT].head ||
- usb->active_pipes[CVMX_USB_TRANSFER_CONTROL].head ||
- usb->active_pipes[CVMX_USB_TRANSFER_BULK].head)
- return -EBUSY;
-
- /* Disable the clocks and put them in power on reset */
- usbn_clk_ctl.u64 = __cvmx_usb_read_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index));
- usbn_clk_ctl.s.enable = 1;
- usbn_clk_ctl.s.por = 1;
- usbn_clk_ctl.s.hclk_rst = 1;
- usbn_clk_ctl.s.prst = 0;
- usbn_clk_ctl.s.hrst = 0;
- __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index),
- usbn_clk_ctl.u64);
- return 0;
+ cvmx_usbnx_clk_ctl_t usbn_clk_ctl;
+ cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t *)state;
+
+ /* Make sure all pipes are closed */
+ if (usb->idle_pipes.head ||
+ usb->active_pipes[CVMX_USB_TRANSFER_ISOCHRONOUS].head ||
+ usb->active_pipes[CVMX_USB_TRANSFER_INTERRUPT].head ||
+ usb->active_pipes[CVMX_USB_TRANSFER_CONTROL].head ||
+ usb->active_pipes[CVMX_USB_TRANSFER_BULK].head)
+ return -EBUSY;
+
+ /* Disable the clocks and put them in power on reset */
+ usbn_clk_ctl.u64 = __cvmx_usb_read_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index));
+ usbn_clk_ctl.s.enable = 1;
+ usbn_clk_ctl.s.por = 1;
+ usbn_clk_ctl.s.hclk_rst = 1;
+ usbn_clk_ctl.s.prst = 0;
+ usbn_clk_ctl.s.hrst = 0;
+ __cvmx_usb_write_csr64(usb, CVMX_USBNX_CLK_CTL(usb->index),
+ usbn_clk_ctl.u64);
+ return 0;
}
* online and servicing requests.
*
* @param state USB device state populated by
- * cvmx_usb_initialize().
+ * cvmx_usb_initialize().
*
* @return 0 or a negative error code.
*/
int cvmx_usb_enable(cvmx_usb_state_t *state)
{
- cvmx_usbcx_ghwcfg3_t usbcx_ghwcfg3;
- cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t*)state;
-
- usb->usbcx_hprt.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HPRT(usb->index));
-
- /* If the port is already enabled the just return. We don't need to do
- anything */
- if (usb->usbcx_hprt.s.prtena)
- return 0;
-
- /* If there is nothing plugged into the port then fail immediately */
- if (!usb->usbcx_hprt.s.prtconnsts) {
- return -ETIMEDOUT;
- }
-
- /* Program the port reset bit to start the reset process */
- USB_SET_FIELD32(CVMX_USBCX_HPRT(usb->index), cvmx_usbcx_hprt_t, prtrst, 1);
-
- /* Wait at least 50ms (high speed), or 10ms (full speed) for the reset
- process to complete. */
- mdelay(50);
-
- /* Program the port reset bit to 0, USBC_HPRT[PRTRST] = 0 */
- USB_SET_FIELD32(CVMX_USBCX_HPRT(usb->index), cvmx_usbcx_hprt_t, prtrst, 0);
-
- /* Wait for the USBC_HPRT[PRTENA]. */
- if (CVMX_WAIT_FOR_FIELD32(CVMX_USBCX_HPRT(usb->index), cvmx_usbcx_hprt_t,
- prtena, ==, 1, 100000))
- return -ETIMEDOUT;
-
- /* Read the port speed field to get the enumerated speed, USBC_HPRT[PRTSPD]. */
- usb->usbcx_hprt.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HPRT(usb->index));
- usbcx_ghwcfg3.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GHWCFG3(usb->index));
-
- /* 13. Program the USBC_GRXFSIZ register to select the size of the receive
- FIFO (25%). */
- USB_SET_FIELD32(CVMX_USBCX_GRXFSIZ(usb->index), cvmx_usbcx_grxfsiz_t,
- rxfdep, usbcx_ghwcfg3.s.dfifodepth / 4);
- /* 14. Program the USBC_GNPTXFSIZ register to select the size and the
- start address of the non- periodic transmit FIFO for nonperiodic
- transactions (50%). */
- {
- cvmx_usbcx_gnptxfsiz_t siz;
- siz.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GNPTXFSIZ(usb->index));
- siz.s.nptxfdep = usbcx_ghwcfg3.s.dfifodepth / 2;
- siz.s.nptxfstaddr = usbcx_ghwcfg3.s.dfifodepth / 4;
- __cvmx_usb_write_csr32(usb, CVMX_USBCX_GNPTXFSIZ(usb->index), siz.u32);
- }
- /* 15. Program the USBC_HPTXFSIZ register to select the size and start
- address of the periodic transmit FIFO for periodic transactions (25%). */
- {
- cvmx_usbcx_hptxfsiz_t siz;
- siz.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HPTXFSIZ(usb->index));
- siz.s.ptxfsize = usbcx_ghwcfg3.s.dfifodepth / 4;
- siz.s.ptxfstaddr = 3 * usbcx_ghwcfg3.s.dfifodepth / 4;
- __cvmx_usb_write_csr32(usb, CVMX_USBCX_HPTXFSIZ(usb->index), siz.u32);
- }
- /* Flush all FIFOs */
- USB_SET_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), cvmx_usbcx_grstctl_t, txfnum, 0x10);
- USB_SET_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), cvmx_usbcx_grstctl_t, txfflsh, 1);
- CVMX_WAIT_FOR_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), cvmx_usbcx_grstctl_t,
- txfflsh, ==, 0, 100);
- USB_SET_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), cvmx_usbcx_grstctl_t, rxfflsh, 1);
- CVMX_WAIT_FOR_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), cvmx_usbcx_grstctl_t,
- rxfflsh, ==, 0, 100);
-
- return 0;
+ cvmx_usbcx_ghwcfg3_t usbcx_ghwcfg3;
+ cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t *)state;
+
+ usb->usbcx_hprt.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HPRT(usb->index));
+
+ /* If the port is already enabled the just return. We don't need to do
+ anything */
+ if (usb->usbcx_hprt.s.prtena)
+ return 0;
+
+ /* If there is nothing plugged into the port then fail immediately */
+ if (!usb->usbcx_hprt.s.prtconnsts) {
+ return -ETIMEDOUT;
+ }
+
+ /* Program the port reset bit to start the reset process */
+ USB_SET_FIELD32(CVMX_USBCX_HPRT(usb->index), cvmx_usbcx_hprt_t, prtrst, 1);
+
+ /* Wait at least 50ms (high speed), or 10ms (full speed) for the reset
+ process to complete. */
+ mdelay(50);
+
+ /* Program the port reset bit to 0, USBC_HPRT[PRTRST] = 0 */
+ USB_SET_FIELD32(CVMX_USBCX_HPRT(usb->index), cvmx_usbcx_hprt_t, prtrst, 0);
+
+ /* Wait for the USBC_HPRT[PRTENA]. */
+ if (CVMX_WAIT_FOR_FIELD32(CVMX_USBCX_HPRT(usb->index), cvmx_usbcx_hprt_t,
+ prtena, ==, 1, 100000))
+ return -ETIMEDOUT;
+
+ /* Read the port speed field to get the enumerated speed, USBC_HPRT[PRTSPD]. */
+ usb->usbcx_hprt.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HPRT(usb->index));
+ usbcx_ghwcfg3.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GHWCFG3(usb->index));
+
+ /* 13. Program the USBC_GRXFSIZ register to select the size of the receive
+ FIFO (25%). */
+ USB_SET_FIELD32(CVMX_USBCX_GRXFSIZ(usb->index), cvmx_usbcx_grxfsiz_t,
+ rxfdep, usbcx_ghwcfg3.s.dfifodepth / 4);
+ /* 14. Program the USBC_GNPTXFSIZ register to select the size and the
+ start address of the non- periodic transmit FIFO for nonperiodic
+ transactions (50%). */
+ {
+ cvmx_usbcx_gnptxfsiz_t siz;
+ siz.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GNPTXFSIZ(usb->index));
+ siz.s.nptxfdep = usbcx_ghwcfg3.s.dfifodepth / 2;
+ siz.s.nptxfstaddr = usbcx_ghwcfg3.s.dfifodepth / 4;
+ __cvmx_usb_write_csr32(usb, CVMX_USBCX_GNPTXFSIZ(usb->index), siz.u32);
+ }
+ /* 15. Program the USBC_HPTXFSIZ register to select the size and start
+ address of the periodic transmit FIFO for periodic transactions (25%). */
+ {
+ cvmx_usbcx_hptxfsiz_t siz;
+ siz.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HPTXFSIZ(usb->index));
+ siz.s.ptxfsize = usbcx_ghwcfg3.s.dfifodepth / 4;
+ siz.s.ptxfstaddr = 3 * usbcx_ghwcfg3.s.dfifodepth / 4;
+ __cvmx_usb_write_csr32(usb, CVMX_USBCX_HPTXFSIZ(usb->index), siz.u32);
+ }
+ /* Flush all FIFOs */
+ USB_SET_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), cvmx_usbcx_grstctl_t, txfnum, 0x10);
+ USB_SET_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), cvmx_usbcx_grstctl_t, txfflsh, 1);
+ CVMX_WAIT_FOR_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), cvmx_usbcx_grstctl_t,
+ txfflsh, ==, 0, 100);
+ USB_SET_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), cvmx_usbcx_grstctl_t, rxfflsh, 1);
+ CVMX_WAIT_FOR_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), cvmx_usbcx_grstctl_t,
+ rxfflsh, ==, 0, 100);
+
+ return 0;
}
* associated callbacks.
*
* @param state USB device state populated by
- * cvmx_usb_initialize().
+ * cvmx_usb_initialize().
*
* @return 0 or a negative error code.
*/
int cvmx_usb_disable(cvmx_usb_state_t *state)
{
- cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t*)state;
+ cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t *)state;
- /* Disable the port */
- USB_SET_FIELD32(CVMX_USBCX_HPRT(usb->index), cvmx_usbcx_hprt_t, prtena, 1);
- return 0;
+ /* Disable the port */
+ USB_SET_FIELD32(CVMX_USBCX_HPRT(usb->index), cvmx_usbcx_hprt_t, prtena, 1);
+ return 0;
}
* them, you must update the status through cvmx_usb_set_status().
*
* @param state USB device state populated by
- * cvmx_usb_initialize().
+ * cvmx_usb_initialize().
*
* @return Port status information
*/
cvmx_usb_port_status_t cvmx_usb_get_status(cvmx_usb_state_t *state)
{
- cvmx_usbcx_hprt_t usbc_hprt;
- cvmx_usb_port_status_t result;
- cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t*)state;
+ cvmx_usbcx_hprt_t usbc_hprt;
+ cvmx_usb_port_status_t result;
+ cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t *)state;
- memset(&result, 0, sizeof(result));
+ memset(&result, 0, sizeof(result));
- usbc_hprt.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HPRT(usb->index));
- result.port_enabled = usbc_hprt.s.prtena;
- result.port_over_current = usbc_hprt.s.prtovrcurract;
- result.port_powered = usbc_hprt.s.prtpwr;
- result.port_speed = usbc_hprt.s.prtspd;
- result.connected = usbc_hprt.s.prtconnsts;
- result.connect_change = (result.connected != usb->port_status.connected);
+ usbc_hprt.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HPRT(usb->index));
+ result.port_enabled = usbc_hprt.s.prtena;
+ result.port_over_current = usbc_hprt.s.prtovrcurract;
+ result.port_powered = usbc_hprt.s.prtpwr;
+ result.port_speed = usbc_hprt.s.prtspd;
+ result.connected = usbc_hprt.s.prtconnsts;
+ result.connect_change = (result.connected != usb->port_status.connected);
- return result;
+ return result;
}
* changed through this call.
*
* @param state USB device state populated by
- * cvmx_usb_initialize().
+ * cvmx_usb_initialize().
* @param port_status
- * Port status to set, most like returned by cvmx_usb_get_status()
+ * Port status to set, most like returned by cvmx_usb_get_status()
*/
void cvmx_usb_set_status(cvmx_usb_state_t *state, cvmx_usb_port_status_t port_status)
{
- cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t*)state;
- usb->port_status = port_status;
- return;
+ cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t *)state;
+ usb->port_status = port_status;
+ return;
}
* Convert a USB transaction into a handle
*
* @param usb USB device state populated by
- * cvmx_usb_initialize().
+ * cvmx_usb_initialize().
* @param transaction
- * Transaction to get handle for
+ * Transaction to get handle for
*
* @return Handle
*/
static inline int __cvmx_usb_get_submit_handle(cvmx_usb_internal_state_t *usb,
- cvmx_usb_transaction_t *transaction)
+ cvmx_usb_transaction_t *transaction)
{
- return ((unsigned long)transaction - (unsigned long)usb->transaction) /
- sizeof(*transaction);
+ return ((unsigned long)transaction - (unsigned long)usb->transaction) /
+ sizeof(*transaction);
}
* Convert a USB pipe into a handle
*
* @param usb USB device state populated by
- * cvmx_usb_initialize().
+ * cvmx_usb_initialize().
* @param pipe Pipe to get handle for
*
* @return Handle
*/
static inline int __cvmx_usb_get_pipe_handle(cvmx_usb_internal_state_t *usb,
- cvmx_usb_pipe_t *pipe)
+ cvmx_usb_pipe_t *pipe)
{
- return ((unsigned long)pipe - (unsigned long)usb->pipe) / sizeof(*pipe);
+ return ((unsigned long)pipe - (unsigned long)usb->pipe) / sizeof(*pipe);
}
* must be opened before data can be transferred between a device
* and Octeon.
*
- * @param state USB device state populated by
- * cvmx_usb_initialize().
- * @param flags Optional pipe flags defined in
- * cvmx_usb_pipe_flags_t.
+ * @param state USB device state populated by
+ * cvmx_usb_initialize().
+ * @param flags Optional pipe flags defined in
+ * cvmx_usb_pipe_flags_t.
* @param device_addr
- * USB device address to open the pipe to
- * (0-127).
+ * USB device address to open the pipe to
+ * (0-127).
* @param endpoint_num
- * USB endpoint number to open the pipe to
- * (0-15).
+ * USB endpoint number to open the pipe to
+ * (0-15).
* @param device_speed
- * The speed of the device the pipe is going
- * to. This must match the device's speed,
- * which may be different than the port speed.
+ * The speed of the device the pipe is going
+ * to. This must match the device's speed,
+ * which may be different than the port speed.
* @param max_packet The maximum packet length the device can
- * transmit/receive (low speed=0-8, full
- * speed=0-1023, high speed=0-1024). This value
- * comes from the standard endpoint descriptor
- * field wMaxPacketSize bits <10:0>.
+ * transmit/receive (low speed=0-8, full
+ * speed=0-1023, high speed=0-1024). This value
+ * comes from the standard endpoint descriptor
+ * field wMaxPacketSize bits <10:0>.
* @param transfer_type
- * The type of transfer this pipe is for.
+ * The type of transfer this pipe is for.
* @param transfer_dir
- * The direction the pipe is in. This is not
- * used for control pipes.
+ * The direction the pipe is in. This is not
+ * used for control pipes.
* @param interval For ISOCHRONOUS and INTERRUPT transfers,
- * this is how often the transfer is scheduled
- * for. All other transfers should specify
- * zero. The units are in frames (8000/sec at
- * high speed, 1000/sec for full speed).
+ * this is how often the transfer is scheduled
+ * for. All other transfers should specify
+ * zero. The units are in frames (8000/sec at
+ * high speed, 1000/sec for full speed).
* @param multi_count
- * For high speed devices, this is the maximum
- * allowed number of packet per microframe.
- * Specify zero for non high speed devices. This
- * value comes from the standard endpoint descriptor
- * field wMaxPacketSize bits <12:11>.
+ * For high speed devices, this is the maximum
+ * allowed number of packet per microframe.
+ * Specify zero for non high speed devices. This
+ * value comes from the standard endpoint descriptor
+ * field wMaxPacketSize bits <12:11>.
* @param hub_device_addr
- * Hub device address this device is connected
- * to. Devices connected directly to Octeon
- * use zero. This is only used when the device
- * is full/low speed behind a high speed hub.
- * The address will be of the high speed hub,
- * not and full speed hubs after it.
+ * Hub device address this device is connected
+ * to. Devices connected directly to Octeon
+ * use zero. This is only used when the device
+ * is full/low speed behind a high speed hub.
+ * The address will be of the high speed hub,
+ * not and full speed hubs after it.
* @param hub_port Which port on the hub the device is
- * connected. Use zero for devices connected
- * directly to Octeon. Like hub_device_addr,
- * this is only used for full/low speed
- * devices behind a high speed hub.
+ * connected. Use zero for devices connected
+ * directly to Octeon. Like hub_device_addr,
+ * this is only used for full/low speed
+ * devices behind a high speed hub.
*
* @return A non negative value is a pipe handle. Negative
- * values are error codes.
+ * values are error codes.
*/
int cvmx_usb_open_pipe(cvmx_usb_state_t *state, cvmx_usb_pipe_flags_t flags,
- int device_addr, int endpoint_num,
- cvmx_usb_speed_t device_speed, int max_packet,
- cvmx_usb_transfer_t transfer_type,
- cvmx_usb_direction_t transfer_dir, int interval,
- int multi_count, int hub_device_addr, int hub_port)
+ int device_addr, int endpoint_num,
+ cvmx_usb_speed_t device_speed, int max_packet,
+ cvmx_usb_transfer_t transfer_type,
+ cvmx_usb_direction_t transfer_dir, int interval,
+ int multi_count, int hub_device_addr, int hub_port)
{
- cvmx_usb_pipe_t *pipe;
- cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t*)state;
-
- if (unlikely((device_addr < 0) || (device_addr > MAX_USB_ADDRESS)))
- return -EINVAL;
- if (unlikely((endpoint_num < 0) || (endpoint_num > MAX_USB_ENDPOINT)))
- return -EINVAL;
- if (unlikely(device_speed > CVMX_USB_SPEED_LOW))
- return -EINVAL;
- if (unlikely((max_packet <= 0) || (max_packet > 1024)))
- return -EINVAL;
- if (unlikely(transfer_type > CVMX_USB_TRANSFER_INTERRUPT))
- return -EINVAL;
- if (unlikely((transfer_dir != CVMX_USB_DIRECTION_OUT) &&
- (transfer_dir != CVMX_USB_DIRECTION_IN)))
- return -EINVAL;
- if (unlikely(interval < 0))
- return -EINVAL;
- if (unlikely((transfer_type == CVMX_USB_TRANSFER_CONTROL) && interval))
- return -EINVAL;
- if (unlikely(multi_count < 0))
- return -EINVAL;
- if (unlikely((device_speed != CVMX_USB_SPEED_HIGH) &&
- (multi_count != 0)))
- return -EINVAL;
- if (unlikely((hub_device_addr < 0) || (hub_device_addr > MAX_USB_ADDRESS)))
- return -EINVAL;
- if (unlikely((hub_port < 0) || (hub_port > MAX_USB_HUB_PORT)))
- return -EINVAL;
-
- /* Find a free pipe */
- pipe = usb->free_pipes.head;
- if (!pipe)
- return -ENOMEM;
- __cvmx_usb_remove_pipe(&usb->free_pipes, pipe);
- pipe->flags = flags | __CVMX_USB_PIPE_FLAGS_OPEN;
- if ((device_speed == CVMX_USB_SPEED_HIGH) &&
- (transfer_dir == CVMX_USB_DIRECTION_OUT) &&
- (transfer_type == CVMX_USB_TRANSFER_BULK))
- pipe->flags |= __CVMX_USB_PIPE_FLAGS_NEED_PING;
- pipe->device_addr = device_addr;
- pipe->endpoint_num = endpoint_num;
- pipe->device_speed = device_speed;
- pipe->max_packet = max_packet;
- pipe->transfer_type = transfer_type;
- pipe->transfer_dir = transfer_dir;
- /* All pipes use interval to rate limit NAK processing. Force an interval
- if one wasn't supplied */
- if (!interval)
- interval = 1;
- if (__cvmx_usb_pipe_needs_split(usb, pipe)) {
- pipe->interval = interval*8;
- /* Force start splits to be schedule on uFrame 0 */
- pipe->next_tx_frame = ((usb->frame_number+7)&~7) + pipe->interval;
- }
- else {
- pipe->interval = interval;
- pipe->next_tx_frame = usb->frame_number + pipe->interval;
- }
- pipe->multi_count = multi_count;
- pipe->hub_device_addr = hub_device_addr;
- pipe->hub_port = hub_port;
- pipe->pid_toggle = 0;
- pipe->split_sc_frame = -1;
- __cvmx_usb_append_pipe(&usb->idle_pipes, pipe);
-
- /* We don't need to tell the hardware about this pipe yet since
- it doesn't have any submitted requests */
-
- return __cvmx_usb_get_pipe_handle(usb, pipe);
+ cvmx_usb_pipe_t *pipe;
+ cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t *)state;
+
+ if (unlikely((device_addr < 0) || (device_addr > MAX_USB_ADDRESS)))
+ return -EINVAL;
+ if (unlikely((endpoint_num < 0) || (endpoint_num > MAX_USB_ENDPOINT)))
+ return -EINVAL;
+ if (unlikely(device_speed > CVMX_USB_SPEED_LOW))
+ return -EINVAL;
+ if (unlikely((max_packet <= 0) || (max_packet > 1024)))
+ return -EINVAL;
+ if (unlikely(transfer_type > CVMX_USB_TRANSFER_INTERRUPT))
+ return -EINVAL;
+ if (unlikely((transfer_dir != CVMX_USB_DIRECTION_OUT) &&
+ (transfer_dir != CVMX_USB_DIRECTION_IN)))
+ return -EINVAL;
+ if (unlikely(interval < 0))
+ return -EINVAL;
+ if (unlikely((transfer_type == CVMX_USB_TRANSFER_CONTROL) && interval))
+ return -EINVAL;
+ if (unlikely(multi_count < 0))
+ return -EINVAL;
+ if (unlikely((device_speed != CVMX_USB_SPEED_HIGH) &&
+ (multi_count != 0)))
+ return -EINVAL;
+ if (unlikely((hub_device_addr < 0) || (hub_device_addr > MAX_USB_ADDRESS)))
+ return -EINVAL;
+ if (unlikely((hub_port < 0) || (hub_port > MAX_USB_HUB_PORT)))
+ return -EINVAL;
+
+ /* Find a free pipe */
+ pipe = usb->free_pipes.head;
+ if (!pipe)
+ return -ENOMEM;
+ __cvmx_usb_remove_pipe(&usb->free_pipes, pipe);
+ pipe->flags = flags | __CVMX_USB_PIPE_FLAGS_OPEN;
+ if ((device_speed == CVMX_USB_SPEED_HIGH) &&
+ (transfer_dir == CVMX_USB_DIRECTION_OUT) &&
+ (transfer_type == CVMX_USB_TRANSFER_BULK))
+ pipe->flags |= __CVMX_USB_PIPE_FLAGS_NEED_PING;
+ pipe->device_addr = device_addr;
+ pipe->endpoint_num = endpoint_num;
+ pipe->device_speed = device_speed;
+ pipe->max_packet = max_packet;
+ pipe->transfer_type = transfer_type;
+ pipe->transfer_dir = transfer_dir;
+ /* All pipes use interval to rate limit NAK processing. Force an interval
+ if one wasn't supplied */
+ if (!interval)
+ interval = 1;
+ if (__cvmx_usb_pipe_needs_split(usb, pipe)) {
+ pipe->interval = interval*8;
+ /* Force start splits to be schedule on uFrame 0 */
+ pipe->next_tx_frame = ((usb->frame_number+7)&~7) + pipe->interval;
+ } else {
+ pipe->interval = interval;
+ pipe->next_tx_frame = usb->frame_number + pipe->interval;
+ }
+ pipe->multi_count = multi_count;
+ pipe->hub_device_addr = hub_device_addr;
+ pipe->hub_port = hub_port;
+ pipe->pid_toggle = 0;
+ pipe->split_sc_frame = -1;
+ __cvmx_usb_append_pipe(&usb->idle_pipes, pipe);
+
+ /* We don't need to tell the hardware about this pipe yet since
+ it doesn't have any submitted requests */
+
+ return __cvmx_usb_get_pipe_handle(usb, pipe);
}
* in non DMA mode. It is very important that this function be called quickly
* enough to prevent FIFO overflow.
*
- * @param usb USB device state populated by
- * cvmx_usb_initialize().
+ * @param usb USB device state populated by
+ * cvmx_usb_initialize().
*/
static void __cvmx_usb_poll_rx_fifo(cvmx_usb_internal_state_t *usb)
{
- cvmx_usbcx_grxstsph_t rx_status;
- int channel;
- int bytes;
- uint64_t address;
- uint32_t *ptr;
-
- rx_status.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GRXSTSPH(usb->index));
- /* Only read data if IN data is there */
- if (rx_status.s.pktsts != 2)
- return;
- /* Check if no data is available */
- if (!rx_status.s.bcnt)
- return;
-
- channel = rx_status.s.chnum;
- bytes = rx_status.s.bcnt;
- if (!bytes)
- return;
-
- /* Get where the DMA engine would have written this data */
- address = __cvmx_usb_read_csr64(usb, CVMX_USBNX_DMA0_INB_CHN0(usb->index) + channel*8);
- ptr = cvmx_phys_to_ptr(address);
- __cvmx_usb_write_csr64(usb, CVMX_USBNX_DMA0_INB_CHN0(usb->index) + channel*8, address + bytes);
-
- /* Loop writing the FIFO data for this packet into memory */
- while (bytes > 0) {
- *ptr++ = __cvmx_usb_read_csr32(usb, USB_FIFO_ADDRESS(channel, usb->index));
- bytes -= 4;
- }
- CVMX_SYNCW;
-
- return;
+ cvmx_usbcx_grxstsph_t rx_status;
+ int channel;
+ int bytes;
+ uint64_t address;
+ uint32_t *ptr;
+
+ rx_status.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GRXSTSPH(usb->index));
+ /* Only read data if IN data is there */
+ if (rx_status.s.pktsts != 2)
+ return;
+ /* Check if no data is available */
+ if (!rx_status.s.bcnt)
+ return;
+
+ channel = rx_status.s.chnum;
+ bytes = rx_status.s.bcnt;
+ if (!bytes)
+ return;
+
+ /* Get where the DMA engine would have written this data */
+ address = __cvmx_usb_read_csr64(usb, CVMX_USBNX_DMA0_INB_CHN0(usb->index) + channel*8);
+ ptr = cvmx_phys_to_ptr(address);
+ __cvmx_usb_write_csr64(usb, CVMX_USBNX_DMA0_INB_CHN0(usb->index) + channel*8, address + bytes);
+
+ /* Loop writing the FIFO data for this packet into memory */
+ while (bytes > 0) {
+ *ptr++ = __cvmx_usb_read_csr32(usb, USB_FIFO_ADDRESS(channel, usb->index));
+ bytes -= 4;
+ }
+ CVMX_SYNCW;
+
+ return;
}
* Fill the TX hardware fifo with data out of the software
* fifos
*
- * @param usb USB device state populated by
- * cvmx_usb_initialize().
- * @param fifo Software fifo to use
+ * @param usb USB device state populated by
+ * cvmx_usb_initialize().
+ * @param fifo Software fifo to use
* @param available Amount of space in the hardware fifo
*
* @return Non zero if the hardware fifo was too small and needs
- * to be serviced again.
+ * to be serviced again.
*/
static int __cvmx_usb_fill_tx_hw(cvmx_usb_internal_state_t *usb, cvmx_usb_tx_fifo_t *fifo, int available)
{
- /* We're done either when there isn't anymore space or the software FIFO
- is empty */
- while (available && (fifo->head != fifo->tail)) {
- int i = fifo->tail;
- const uint32_t *ptr = cvmx_phys_to_ptr(fifo->entry[i].address);
- uint64_t csr_address = USB_FIFO_ADDRESS(fifo->entry[i].channel, usb->index) ^ 4;
- int words = available;
-
- /* Limit the amount of data to waht the SW fifo has */
- if (fifo->entry[i].size <= available) {
- words = fifo->entry[i].size;
- fifo->tail++;
- if (fifo->tail > MAX_CHANNELS)
- fifo->tail = 0;
- }
-
- /* Update the next locations and counts */
- available -= words;
- fifo->entry[i].address += words * 4;
- fifo->entry[i].size -= words;
-
- /* Write the HW fifo data. The read every three writes is due
- to an errata on CN3XXX chips */
- while (words > 3) {
- cvmx_write64_uint32(csr_address, *ptr++);
- cvmx_write64_uint32(csr_address, *ptr++);
- cvmx_write64_uint32(csr_address, *ptr++);
- cvmx_read64_uint64(CVMX_USBNX_DMA0_INB_CHN0(usb->index));
- words -= 3;
- }
- cvmx_write64_uint32(csr_address, *ptr++);
- if (--words) {
- cvmx_write64_uint32(csr_address, *ptr++);
- if (--words)
- cvmx_write64_uint32(csr_address, *ptr++);
- }
- cvmx_read64_uint64(CVMX_USBNX_DMA0_INB_CHN0(usb->index));
- }
- return fifo->head != fifo->tail;
+ /* We're done either when there isn't anymore space or the software FIFO
+ is empty */
+ while (available && (fifo->head != fifo->tail)) {
+ int i = fifo->tail;
+ const uint32_t *ptr = cvmx_phys_to_ptr(fifo->entry[i].address);
+ uint64_t csr_address = USB_FIFO_ADDRESS(fifo->entry[i].channel, usb->index) ^ 4;
+ int words = available;
+
+ /* Limit the amount of data to waht the SW fifo has */
+ if (fifo->entry[i].size <= available) {
+ words = fifo->entry[i].size;
+ fifo->tail++;
+ if (fifo->tail > MAX_CHANNELS)
+ fifo->tail = 0;
+ }
+
+ /* Update the next locations and counts */
+ available -= words;
+ fifo->entry[i].address += words * 4;
+ fifo->entry[i].size -= words;
+
+ /* Write the HW fifo data. The read every three writes is due
+ to an errata on CN3XXX chips */
+ while (words > 3) {
+ cvmx_write64_uint32(csr_address, *ptr++);
+ cvmx_write64_uint32(csr_address, *ptr++);
+ cvmx_write64_uint32(csr_address, *ptr++);
+ cvmx_read64_uint64(CVMX_USBNX_DMA0_INB_CHN0(usb->index));
+ words -= 3;
+ }
+ cvmx_write64_uint32(csr_address, *ptr++);
+ if (--words) {
+ cvmx_write64_uint32(csr_address, *ptr++);
+ if (--words)
+ cvmx_write64_uint32(csr_address, *ptr++);
+ }
+ cvmx_read64_uint64(CVMX_USBNX_DMA0_INB_CHN0(usb->index));
+ }
+ return fifo->head != fifo->tail;
}
/**
* Check the hardware FIFOs and fill them as needed
*
- * @param usb USB device state populated by
- * cvmx_usb_initialize().
+ * @param usb USB device state populated by
+ * cvmx_usb_initialize().
*/
static void __cvmx_usb_poll_tx_fifo(cvmx_usb_internal_state_t *usb)
{
- if (usb->periodic.head != usb->periodic.tail) {
- cvmx_usbcx_hptxsts_t tx_status;
- tx_status.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HPTXSTS(usb->index));
- if (__cvmx_usb_fill_tx_hw(usb, &usb->periodic, tx_status.s.ptxfspcavail))
- USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), cvmx_usbcx_gintmsk_t, ptxfempmsk, 1);
- else
- USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), cvmx_usbcx_gintmsk_t, ptxfempmsk, 0);
- }
-
- if (usb->nonperiodic.head != usb->nonperiodic.tail) {
- cvmx_usbcx_gnptxsts_t tx_status;
- tx_status.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GNPTXSTS(usb->index));
- if (__cvmx_usb_fill_tx_hw(usb, &usb->nonperiodic, tx_status.s.nptxfspcavail))
- USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), cvmx_usbcx_gintmsk_t, nptxfempmsk, 1);
- else
- USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), cvmx_usbcx_gintmsk_t, nptxfempmsk, 0);
- }
-
- return;
+ if (usb->periodic.head != usb->periodic.tail) {
+ cvmx_usbcx_hptxsts_t tx_status;
+ tx_status.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HPTXSTS(usb->index));
+ if (__cvmx_usb_fill_tx_hw(usb, &usb->periodic, tx_status.s.ptxfspcavail))
+ USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), cvmx_usbcx_gintmsk_t, ptxfempmsk, 1);
+ else
+ USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), cvmx_usbcx_gintmsk_t, ptxfempmsk, 0);
+ }
+
+ if (usb->nonperiodic.head != usb->nonperiodic.tail) {
+ cvmx_usbcx_gnptxsts_t tx_status;
+ tx_status.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GNPTXSTS(usb->index));
+ if (__cvmx_usb_fill_tx_hw(usb, &usb->nonperiodic, tx_status.s.nptxfspcavail))
+ USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), cvmx_usbcx_gintmsk_t, nptxfempmsk, 1);
+ else
+ USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), cvmx_usbcx_gintmsk_t, nptxfempmsk, 0);
+ }
+
+ return;
}
* @INTERNAL
* Fill the TX FIFO with an outgoing packet
*
- * @param usb USB device state populated by
- * cvmx_usb_initialize().
+ * @param usb USB device state populated by
+ * cvmx_usb_initialize().
* @param channel Channel number to get packet from
*/
static void __cvmx_usb_fill_tx_fifo(cvmx_usb_internal_state_t *usb, int channel)
{
- cvmx_usbcx_hccharx_t hcchar;
- cvmx_usbcx_hcspltx_t usbc_hcsplt;
- cvmx_usbcx_hctsizx_t usbc_hctsiz;
- cvmx_usb_tx_fifo_t *fifo;
-
- /* We only need to fill data on outbound channels */
- hcchar.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCCHARX(channel, usb->index));
- if (hcchar.s.epdir != CVMX_USB_DIRECTION_OUT)
- return;
-
- /* OUT Splits only have data on the start and not the complete */
- usbc_hcsplt.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCSPLTX(channel, usb->index));
- if (usbc_hcsplt.s.spltena && usbc_hcsplt.s.compsplt)
- return;
-
- /* Find out how many bytes we need to fill and convert it into 32bit words */
- usbc_hctsiz.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCTSIZX(channel, usb->index));
- if (!usbc_hctsiz.s.xfersize)
- return;
-
- if ((hcchar.s.eptype == CVMX_USB_TRANSFER_INTERRUPT) ||
- (hcchar.s.eptype == CVMX_USB_TRANSFER_ISOCHRONOUS))
- fifo = &usb->periodic;
- else
- fifo = &usb->nonperiodic;
-
- fifo->entry[fifo->head].channel = channel;
- fifo->entry[fifo->head].address = __cvmx_usb_read_csr64(usb, CVMX_USBNX_DMA0_OUTB_CHN0(usb->index) + channel*8);
- fifo->entry[fifo->head].size = (usbc_hctsiz.s.xfersize+3)>>2;
- fifo->head++;
- if (fifo->head > MAX_CHANNELS)
- fifo->head = 0;
-
- __cvmx_usb_poll_tx_fifo(usb);
-
- return;
+ cvmx_usbcx_hccharx_t hcchar;
+ cvmx_usbcx_hcspltx_t usbc_hcsplt;
+ cvmx_usbcx_hctsizx_t usbc_hctsiz;
+ cvmx_usb_tx_fifo_t *fifo;
+
+ /* We only need to fill data on outbound channels */
+ hcchar.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCCHARX(channel, usb->index));
+ if (hcchar.s.epdir != CVMX_USB_DIRECTION_OUT)
+ return;
+
+ /* OUT Splits only have data on the start and not the complete */
+ usbc_hcsplt.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCSPLTX(channel, usb->index));
+ if (usbc_hcsplt.s.spltena && usbc_hcsplt.s.compsplt)
+ return;
+
+ /* Find out how many bytes we need to fill and convert it into 32bit words */
+ usbc_hctsiz.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCTSIZX(channel, usb->index));
+ if (!usbc_hctsiz.s.xfersize)
+ return;
+
+ if ((hcchar.s.eptype == CVMX_USB_TRANSFER_INTERRUPT) ||
+ (hcchar.s.eptype == CVMX_USB_TRANSFER_ISOCHRONOUS))
+ fifo = &usb->periodic;
+ else
+ fifo = &usb->nonperiodic;
+
+ fifo->entry[fifo->head].channel = channel;
+ fifo->entry[fifo->head].address = __cvmx_usb_read_csr64(usb, CVMX_USBNX_DMA0_OUTB_CHN0(usb->index) + channel*8);
+ fifo->entry[fifo->head].size = (usbc_hctsiz.s.xfersize+3)>>2;
+ fifo->head++;
+ if (fifo->head > MAX_CHANNELS)
+ fifo->head = 0;
+
+ __cvmx_usb_poll_tx_fifo(usb);
+
+ return;
}
/**
* the generic stuff will already have been done in
* __cvmx_usb_start_channel()
*
- * @param usb USB device state populated by
- * cvmx_usb_initialize().
+ * @param usb USB device state populated by
+ * cvmx_usb_initialize().
* @param channel Channel to setup
- * @param pipe Pipe for control transaction
+ * @param pipe Pipe for control transaction
*/
static void __cvmx_usb_start_channel_control(cvmx_usb_internal_state_t *usb,
- int channel,
- cvmx_usb_pipe_t *pipe)
+ int channel,
+ cvmx_usb_pipe_t *pipe)
{
- cvmx_usb_transaction_t *transaction = pipe->head;
- cvmx_usb_control_header_t *header = cvmx_phys_to_ptr(transaction->control_header);
- int bytes_to_transfer = transaction->buffer_length - transaction->actual_bytes;
- int packets_to_transfer;
- cvmx_usbcx_hctsizx_t usbc_hctsiz;
-
- usbc_hctsiz.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCTSIZX(channel, usb->index));
-
- switch (transaction->stage) {
- case CVMX_USB_STAGE_NON_CONTROL:
- case CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE:
- cvmx_dprintf("%s: ERROR - Non control stage\n", __FUNCTION__);
- break;
- case CVMX_USB_STAGE_SETUP:
- usbc_hctsiz.s.pid = 3; /* Setup */
- bytes_to_transfer = sizeof(*header);
- /* All Control operations start with a setup going OUT */
- USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), cvmx_usbcx_hccharx_t, epdir, CVMX_USB_DIRECTION_OUT);
- /* Setup send the control header instead of the buffer data. The
- buffer data will be used in the next stage */
- __cvmx_usb_write_csr64(usb, CVMX_USBNX_DMA0_OUTB_CHN0(usb->index) + channel*8, transaction->control_header);
- break;
- case CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE:
- usbc_hctsiz.s.pid = 3; /* Setup */
- bytes_to_transfer = 0;
- /* All Control operations start with a setup going OUT */
- USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), cvmx_usbcx_hccharx_t, epdir, CVMX_USB_DIRECTION_OUT);
- USB_SET_FIELD32(CVMX_USBCX_HCSPLTX(channel, usb->index), cvmx_usbcx_hcspltx_t, compsplt, 1);
- break;
- case CVMX_USB_STAGE_DATA:
- usbc_hctsiz.s.pid = __cvmx_usb_get_data_pid(pipe);
- if (__cvmx_usb_pipe_needs_split(usb, pipe)) {
- if (header->s.request_type & 0x80)
- bytes_to_transfer = 0;
- else if (bytes_to_transfer > pipe->max_packet)
- bytes_to_transfer = pipe->max_packet;
- }
- USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index),
- cvmx_usbcx_hccharx_t, epdir,
- ((header->s.request_type & 0x80) ?
- CVMX_USB_DIRECTION_IN :
- CVMX_USB_DIRECTION_OUT));
- break;
- case CVMX_USB_STAGE_DATA_SPLIT_COMPLETE:
- usbc_hctsiz.s.pid = __cvmx_usb_get_data_pid(pipe);
- if (!(header->s.request_type & 0x80))
- bytes_to_transfer = 0;
- USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index),
- cvmx_usbcx_hccharx_t, epdir,
- ((header->s.request_type & 0x80) ?
- CVMX_USB_DIRECTION_IN :
- CVMX_USB_DIRECTION_OUT));
- USB_SET_FIELD32(CVMX_USBCX_HCSPLTX(channel, usb->index), cvmx_usbcx_hcspltx_t, compsplt, 1);
- break;
- case CVMX_USB_STAGE_STATUS:
- usbc_hctsiz.s.pid = __cvmx_usb_get_data_pid(pipe);
- bytes_to_transfer = 0;
- USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), cvmx_usbcx_hccharx_t, epdir,
- ((header->s.request_type & 0x80) ?
- CVMX_USB_DIRECTION_OUT :
- CVMX_USB_DIRECTION_IN));
- break;
- case CVMX_USB_STAGE_STATUS_SPLIT_COMPLETE:
- usbc_hctsiz.s.pid = __cvmx_usb_get_data_pid(pipe);
- bytes_to_transfer = 0;
- USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), cvmx_usbcx_hccharx_t, epdir,
- ((header->s.request_type & 0x80) ?
- CVMX_USB_DIRECTION_OUT :
- CVMX_USB_DIRECTION_IN));
- USB_SET_FIELD32(CVMX_USBCX_HCSPLTX(channel, usb->index), cvmx_usbcx_hcspltx_t, compsplt, 1);
- break;
- }
-
- /* Make sure the transfer never exceeds the byte limit of the hardware.
- Further bytes will be sent as continued transactions */
- if (bytes_to_transfer > MAX_TRANSFER_BYTES) {
- /* Round MAX_TRANSFER_BYTES to a multiple of out packet size */
- bytes_to_transfer = MAX_TRANSFER_BYTES / pipe->max_packet;
- bytes_to_transfer *= pipe->max_packet;
- }
-
- /* Calculate the number of packets to transfer. If the length is zero
- we still need to transfer one packet */
- packets_to_transfer = (bytes_to_transfer + pipe->max_packet - 1) / pipe->max_packet;
- if (packets_to_transfer == 0)
- packets_to_transfer = 1;
- else if ((packets_to_transfer>1) && (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA)) {
- /* Limit to one packet when not using DMA. Channels must be restarted
- between every packet for IN transactions, so there is no reason to
- do multiple packets in a row */
- packets_to_transfer = 1;
- bytes_to_transfer = packets_to_transfer * pipe->max_packet;
- }
- else if (packets_to_transfer > MAX_TRANSFER_PACKETS) {
- /* Limit the number of packet and data transferred to what the
- hardware can handle */
- packets_to_transfer = MAX_TRANSFER_PACKETS;
- bytes_to_transfer = packets_to_transfer * pipe->max_packet;
- }
-
- usbc_hctsiz.s.xfersize = bytes_to_transfer;
- usbc_hctsiz.s.pktcnt = packets_to_transfer;
-
- __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCTSIZX(channel, usb->index), usbc_hctsiz.u32);
- return;
+ cvmx_usb_transaction_t *transaction = pipe->head;
+ cvmx_usb_control_header_t *header = cvmx_phys_to_ptr(transaction->control_header);
+ int bytes_to_transfer = transaction->buffer_length - transaction->actual_bytes;
+ int packets_to_transfer;
+ cvmx_usbcx_hctsizx_t usbc_hctsiz;
+
+ usbc_hctsiz.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCTSIZX(channel, usb->index));
+
+ switch (transaction->stage) {
+ case CVMX_USB_STAGE_NON_CONTROL:
+ case CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE:
+ cvmx_dprintf("%s: ERROR - Non control stage\n", __FUNCTION__);
+ break;
+ case CVMX_USB_STAGE_SETUP:
+ usbc_hctsiz.s.pid = 3; /* Setup */
+ bytes_to_transfer = sizeof(*header);
+ /* All Control operations start with a setup going OUT */
+ USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), cvmx_usbcx_hccharx_t, epdir, CVMX_USB_DIRECTION_OUT);
+ /* Setup send the control header instead of the buffer data. The
+ buffer data will be used in the next stage */
+ __cvmx_usb_write_csr64(usb, CVMX_USBNX_DMA0_OUTB_CHN0(usb->index) + channel*8, transaction->control_header);
+ break;
+ case CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE:
+ usbc_hctsiz.s.pid = 3; /* Setup */
+ bytes_to_transfer = 0;
+ /* All Control operations start with a setup going OUT */
+ USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), cvmx_usbcx_hccharx_t, epdir, CVMX_USB_DIRECTION_OUT);
+ USB_SET_FIELD32(CVMX_USBCX_HCSPLTX(channel, usb->index), cvmx_usbcx_hcspltx_t, compsplt, 1);
+ break;
+ case CVMX_USB_STAGE_DATA:
+ usbc_hctsiz.s.pid = __cvmx_usb_get_data_pid(pipe);
+ if (__cvmx_usb_pipe_needs_split(usb, pipe)) {
+ if (header->s.request_type & 0x80)
+ bytes_to_transfer = 0;
+ else if (bytes_to_transfer > pipe->max_packet)
+ bytes_to_transfer = pipe->max_packet;
+ }
+ USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index),
+ cvmx_usbcx_hccharx_t, epdir,
+ ((header->s.request_type & 0x80) ?
+ CVMX_USB_DIRECTION_IN :
+ CVMX_USB_DIRECTION_OUT));
+ break;
+ case CVMX_USB_STAGE_DATA_SPLIT_COMPLETE:
+ usbc_hctsiz.s.pid = __cvmx_usb_get_data_pid(pipe);
+ if (!(header->s.request_type & 0x80))
+ bytes_to_transfer = 0;
+ USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index),
+ cvmx_usbcx_hccharx_t, epdir,
+ ((header->s.request_type & 0x80) ?
+ CVMX_USB_DIRECTION_IN :
+ CVMX_USB_DIRECTION_OUT));
+ USB_SET_FIELD32(CVMX_USBCX_HCSPLTX(channel, usb->index), cvmx_usbcx_hcspltx_t, compsplt, 1);
+ break;
+ case CVMX_USB_STAGE_STATUS:
+ usbc_hctsiz.s.pid = __cvmx_usb_get_data_pid(pipe);
+ bytes_to_transfer = 0;
+ USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), cvmx_usbcx_hccharx_t, epdir,
+ ((header->s.request_type & 0x80) ?
+ CVMX_USB_DIRECTION_OUT :
+ CVMX_USB_DIRECTION_IN));
+ break;
+ case CVMX_USB_STAGE_STATUS_SPLIT_COMPLETE:
+ usbc_hctsiz.s.pid = __cvmx_usb_get_data_pid(pipe);
+ bytes_to_transfer = 0;
+ USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), cvmx_usbcx_hccharx_t, epdir,
+ ((header->s.request_type & 0x80) ?
+ CVMX_USB_DIRECTION_OUT :
+ CVMX_USB_DIRECTION_IN));
+ USB_SET_FIELD32(CVMX_USBCX_HCSPLTX(channel, usb->index), cvmx_usbcx_hcspltx_t, compsplt, 1);
+ break;
+ }
+
+ /* Make sure the transfer never exceeds the byte limit of the hardware.
+ Further bytes will be sent as continued transactions */
+ if (bytes_to_transfer > MAX_TRANSFER_BYTES) {
+ /* Round MAX_TRANSFER_BYTES to a multiple of out packet size */
+ bytes_to_transfer = MAX_TRANSFER_BYTES / pipe->max_packet;
+ bytes_to_transfer *= pipe->max_packet;
+ }
+
+ /* Calculate the number of packets to transfer. If the length is zero
+ we still need to transfer one packet */
+ packets_to_transfer = (bytes_to_transfer + pipe->max_packet - 1) / pipe->max_packet;
+ if (packets_to_transfer == 0)
+ packets_to_transfer = 1;
+ else if ((packets_to_transfer > 1) && (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA)) {
+ /* Limit to one packet when not using DMA. Channels must be restarted
+ between every packet for IN transactions, so there is no reason to
+ do multiple packets in a row */
+ packets_to_transfer = 1;
+ bytes_to_transfer = packets_to_transfer * pipe->max_packet;
+ } else if (packets_to_transfer > MAX_TRANSFER_PACKETS) {
+ /* Limit the number of packet and data transferred to what the
+ hardware can handle */
+ packets_to_transfer = MAX_TRANSFER_PACKETS;
+ bytes_to_transfer = packets_to_transfer * pipe->max_packet;
+ }
+
+ usbc_hctsiz.s.xfersize = bytes_to_transfer;
+ usbc_hctsiz.s.pktcnt = packets_to_transfer;
+
+ __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCTSIZX(channel, usb->index), usbc_hctsiz.u32);
+ return;
}
* @INTERNAL
* Start a channel to perform the pipe's head transaction
*
- * @param usb USB device state populated by
- * cvmx_usb_initialize().
+ * @param usb USB device state populated by
+ * cvmx_usb_initialize().
* @param channel Channel to setup
- * @param pipe Pipe to start
+ * @param pipe Pipe to start
*/
static void __cvmx_usb_start_channel(cvmx_usb_internal_state_t *usb,
- int channel,
- cvmx_usb_pipe_t *pipe)
+ int channel,
+ cvmx_usb_pipe_t *pipe)
{
- cvmx_usb_transaction_t *transaction = pipe->head;
-
- /* Make sure all writes to the DMA region get flushed */
- CVMX_SYNCW;
-
- /* Attach the channel to the pipe */
- usb->pipe_for_channel[channel] = pipe;
- pipe->channel = channel;
- pipe->flags |= __CVMX_USB_PIPE_FLAGS_SCHEDULED;
-
- /* Mark this channel as in use */
- usb->idle_hardware_channels &= ~(1<<channel);
-
- /* Enable the channel interrupt bits */
- {
- cvmx_usbcx_hcintx_t usbc_hcint;
- cvmx_usbcx_hcintmskx_t usbc_hcintmsk;
- cvmx_usbcx_haintmsk_t usbc_haintmsk;
-
- /* Clear all channel status bits */
- usbc_hcint.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCINTX(channel, usb->index));
- __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCINTX(channel, usb->index), usbc_hcint.u32);
-
- usbc_hcintmsk.u32 = 0;
- usbc_hcintmsk.s.chhltdmsk = 1;
- if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) {
- /* Channels need these extra interrupts when we aren't in DMA mode */
- usbc_hcintmsk.s.datatglerrmsk = 1;
- usbc_hcintmsk.s.frmovrunmsk = 1;
- usbc_hcintmsk.s.bblerrmsk = 1;
- usbc_hcintmsk.s.xacterrmsk = 1;
- if (__cvmx_usb_pipe_needs_split(usb, pipe)) {
- /* Splits don't generate xfercompl, so we need ACK and NYET */
- usbc_hcintmsk.s.nyetmsk = 1;
- usbc_hcintmsk.s.ackmsk = 1;
- }
- usbc_hcintmsk.s.nakmsk = 1;
- usbc_hcintmsk.s.stallmsk = 1;
- usbc_hcintmsk.s.xfercomplmsk = 1;
- }
- __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCINTMSKX(channel, usb->index), usbc_hcintmsk.u32);
-
- /* Enable the channel interrupt to propagate */
- usbc_haintmsk.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HAINTMSK(usb->index));
- usbc_haintmsk.s.haintmsk |= 1<<channel;
- __cvmx_usb_write_csr32(usb, CVMX_USBCX_HAINTMSK(usb->index), usbc_haintmsk.u32);
- }
-
- /* Setup the locations the DMA engines use */
- {
- uint64_t dma_address = transaction->buffer + transaction->actual_bytes;
- if (transaction->type == CVMX_USB_TRANSFER_ISOCHRONOUS)
- dma_address = transaction->buffer + transaction->iso_packets[0].offset + transaction->actual_bytes;
- __cvmx_usb_write_csr64(usb, CVMX_USBNX_DMA0_OUTB_CHN0(usb->index) + channel*8, dma_address);
- __cvmx_usb_write_csr64(usb, CVMX_USBNX_DMA0_INB_CHN0(usb->index) + channel*8, dma_address);
- }
-
- /* Setup both the size of the transfer and the SPLIT characteristics */
- {
- cvmx_usbcx_hcspltx_t usbc_hcsplt = {.u32 = 0};
- cvmx_usbcx_hctsizx_t usbc_hctsiz = {.u32 = 0};
- int packets_to_transfer;
- int bytes_to_transfer = transaction->buffer_length - transaction->actual_bytes;
-
- /* ISOCHRONOUS transactions store each individual transfer size in the
- packet structure, not the global buffer_length */
- if (transaction->type == CVMX_USB_TRANSFER_ISOCHRONOUS)
- bytes_to_transfer = transaction->iso_packets[0].length - transaction->actual_bytes;
-
- /* We need to do split transactions when we are talking to non high
- speed devices that are behind a high speed hub */
- if (__cvmx_usb_pipe_needs_split(usb, pipe)) {
- /* On the start split phase (stage is even) record the frame number we
- will need to send the split complete. We only store the lower two bits
- since the time ahead can only be two frames */
- if ((transaction->stage&1) == 0) {
- if (transaction->type == CVMX_USB_TRANSFER_BULK)
- pipe->split_sc_frame = (usb->frame_number + 1) & 0x7f;
- else
- pipe->split_sc_frame = (usb->frame_number + 2) & 0x7f;
- }
- else
- pipe->split_sc_frame = -1;
-
- usbc_hcsplt.s.spltena = 1;
- usbc_hcsplt.s.hubaddr = pipe->hub_device_addr;
- usbc_hcsplt.s.prtaddr = pipe->hub_port;
- usbc_hcsplt.s.compsplt = (transaction->stage == CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE);
-
- /* SPLIT transactions can only ever transmit one data packet so
- limit the transfer size to the max packet size */
- if (bytes_to_transfer > pipe->max_packet)
- bytes_to_transfer = pipe->max_packet;
-
- /* ISOCHRONOUS OUT splits are unique in that they limit
- data transfers to 188 byte chunks representing the
- begin/middle/end of the data or all */
- if (!usbc_hcsplt.s.compsplt &&
- (pipe->transfer_dir == CVMX_USB_DIRECTION_OUT) &&
- (pipe->transfer_type == CVMX_USB_TRANSFER_ISOCHRONOUS)) {
- /* Clear the split complete frame number as there isn't going
- to be a split complete */
- pipe->split_sc_frame = -1;
- /* See if we've started this transfer and sent data */
- if (transaction->actual_bytes == 0) {
- /* Nothing sent yet, this is either a begin or the
- entire payload */
- if (bytes_to_transfer <= 188)
- usbc_hcsplt.s.xactpos = 3; /* Entire payload in one go */
- else
- usbc_hcsplt.s.xactpos = 2; /* First part of payload */
- }
- else {
- /* Continuing the previous data, we must either be
- in the middle or at the end */
- if (bytes_to_transfer <= 188)
- usbc_hcsplt.s.xactpos = 1; /* End of payload */
- else
- usbc_hcsplt.s.xactpos = 0; /* Middle of payload */
- }
- /* Again, the transfer size is limited to 188 bytes */
- if (bytes_to_transfer > 188)
- bytes_to_transfer = 188;
- }
- }
-
- /* Make sure the transfer never exceeds the byte limit of the hardware.
- Further bytes will be sent as continued transactions */
- if (bytes_to_transfer > MAX_TRANSFER_BYTES) {
- /* Round MAX_TRANSFER_BYTES to a multiple of out packet size */
- bytes_to_transfer = MAX_TRANSFER_BYTES / pipe->max_packet;
- bytes_to_transfer *= pipe->max_packet;
- }
-
- /* Calculate the number of packets to transfer. If the length is zero
- we still need to transfer one packet */
- packets_to_transfer = (bytes_to_transfer + pipe->max_packet - 1) / pipe->max_packet;
- if (packets_to_transfer == 0)
- packets_to_transfer = 1;
- else if ((packets_to_transfer>1) && (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA)) {
- /* Limit to one packet when not using DMA. Channels must be restarted
- between every packet for IN transactions, so there is no reason to
- do multiple packets in a row */
- packets_to_transfer = 1;
- bytes_to_transfer = packets_to_transfer * pipe->max_packet;
- }
- else if (packets_to_transfer > MAX_TRANSFER_PACKETS) {
- /* Limit the number of packet and data transferred to what the
- hardware can handle */
- packets_to_transfer = MAX_TRANSFER_PACKETS;
- bytes_to_transfer = packets_to_transfer * pipe->max_packet;
- }
-
- usbc_hctsiz.s.xfersize = bytes_to_transfer;
- usbc_hctsiz.s.pktcnt = packets_to_transfer;
-
- /* Update the DATA0/DATA1 toggle */
- usbc_hctsiz.s.pid = __cvmx_usb_get_data_pid(pipe);
- /* High speed pipes may need a hardware ping before they start */
- if (pipe->flags & __CVMX_USB_PIPE_FLAGS_NEED_PING)
- usbc_hctsiz.s.dopng = 1;
-
- __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCSPLTX(channel, usb->index), usbc_hcsplt.u32);
- __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCTSIZX(channel, usb->index), usbc_hctsiz.u32);
- }
-
- /* Setup the Host Channel Characteristics Register */
- {
- cvmx_usbcx_hccharx_t usbc_hcchar = {.u32 = 0};
-
- /* Set the startframe odd/even properly. This is only used for periodic */
- usbc_hcchar.s.oddfrm = usb->frame_number&1;
-
- /* Set the number of back to back packets allowed by this endpoint.
- Split transactions interpret "ec" as the number of immediate
- retries of failure. These retries happen too quickly, so we
- disable these entirely for splits */
- if (__cvmx_usb_pipe_needs_split(usb, pipe))
- usbc_hcchar.s.ec = 1;
- else if (pipe->multi_count < 1)
- usbc_hcchar.s.ec = 1;
- else if (pipe->multi_count > 3)
- usbc_hcchar.s.ec = 3;
- else
- usbc_hcchar.s.ec = pipe->multi_count;
-
- /* Set the rest of the endpoint specific settings */
- usbc_hcchar.s.devaddr = pipe->device_addr;
- usbc_hcchar.s.eptype = transaction->type;
- usbc_hcchar.s.lspddev = (pipe->device_speed == CVMX_USB_SPEED_LOW);
- usbc_hcchar.s.epdir = pipe->transfer_dir;
- usbc_hcchar.s.epnum = pipe->endpoint_num;
- usbc_hcchar.s.mps = pipe->max_packet;
- __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCCHARX(channel, usb->index), usbc_hcchar.u32);
- }
-
- /* Do transaction type specific fixups as needed */
- switch (transaction->type) {
- case CVMX_USB_TRANSFER_CONTROL:
- __cvmx_usb_start_channel_control(usb, channel, pipe);
- break;
- case CVMX_USB_TRANSFER_BULK:
- case CVMX_USB_TRANSFER_INTERRUPT:
- break;
- case CVMX_USB_TRANSFER_ISOCHRONOUS:
- if (!__cvmx_usb_pipe_needs_split(usb, pipe)) {
- /* ISO transactions require different PIDs depending on direction
- and how many packets are needed */
- if (pipe->transfer_dir == CVMX_USB_DIRECTION_OUT) {
- if (pipe->multi_count < 2) /* Need DATA0 */
- USB_SET_FIELD32(CVMX_USBCX_HCTSIZX(channel, usb->index), cvmx_usbcx_hctsizx_t, pid, 0);
- else /* Need MDATA */
- USB_SET_FIELD32(CVMX_USBCX_HCTSIZX(channel, usb->index), cvmx_usbcx_hctsizx_t, pid, 3);
- }
- }
- break;
- }
- {
- cvmx_usbcx_hctsizx_t usbc_hctsiz = {.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCTSIZX(channel, usb->index))};
- transaction->xfersize = usbc_hctsiz.s.xfersize;
- transaction->pktcnt = usbc_hctsiz.s.pktcnt;
- }
- /* Remeber when we start a split transaction */
- if (__cvmx_usb_pipe_needs_split(usb, pipe))
- usb->active_split = transaction;
- USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), cvmx_usbcx_hccharx_t, chena, 1);
- if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA)
- __cvmx_usb_fill_tx_fifo(usb, channel);
- return;
+ cvmx_usb_transaction_t *transaction = pipe->head;
+
+ /* Make sure all writes to the DMA region get flushed */
+ CVMX_SYNCW;
+
+ /* Attach the channel to the pipe */
+ usb->pipe_for_channel[channel] = pipe;
+ pipe->channel = channel;
+ pipe->flags |= __CVMX_USB_PIPE_FLAGS_SCHEDULED;
+
+ /* Mark this channel as in use */
+ usb->idle_hardware_channels &= ~(1<<channel);
+
+ /* Enable the channel interrupt bits */
+ {
+ cvmx_usbcx_hcintx_t usbc_hcint;
+ cvmx_usbcx_hcintmskx_t usbc_hcintmsk;
+ cvmx_usbcx_haintmsk_t usbc_haintmsk;
+
+ /* Clear all channel status bits */
+ usbc_hcint.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCINTX(channel, usb->index));
+ __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCINTX(channel, usb->index), usbc_hcint.u32);
+
+ usbc_hcintmsk.u32 = 0;
+ usbc_hcintmsk.s.chhltdmsk = 1;
+ if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) {
+ /* Channels need these extra interrupts when we aren't in DMA mode */
+ usbc_hcintmsk.s.datatglerrmsk = 1;
+ usbc_hcintmsk.s.frmovrunmsk = 1;
+ usbc_hcintmsk.s.bblerrmsk = 1;
+ usbc_hcintmsk.s.xacterrmsk = 1;
+ if (__cvmx_usb_pipe_needs_split(usb, pipe)) {
+ /* Splits don't generate xfercompl, so we need ACK and NYET */
+ usbc_hcintmsk.s.nyetmsk = 1;
+ usbc_hcintmsk.s.ackmsk = 1;
+ }
+ usbc_hcintmsk.s.nakmsk = 1;
+ usbc_hcintmsk.s.stallmsk = 1;
+ usbc_hcintmsk.s.xfercomplmsk = 1;
+ }
+ __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCINTMSKX(channel, usb->index), usbc_hcintmsk.u32);
+
+ /* Enable the channel interrupt to propagate */
+ usbc_haintmsk.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HAINTMSK(usb->index));
+ usbc_haintmsk.s.haintmsk |= 1<<channel;
+ __cvmx_usb_write_csr32(usb, CVMX_USBCX_HAINTMSK(usb->index), usbc_haintmsk.u32);
+ }
+
+ /* Setup the locations the DMA engines use */
+ {
+ uint64_t dma_address = transaction->buffer + transaction->actual_bytes;
+ if (transaction->type == CVMX_USB_TRANSFER_ISOCHRONOUS)
+ dma_address = transaction->buffer + transaction->iso_packets[0].offset + transaction->actual_bytes;
+ __cvmx_usb_write_csr64(usb, CVMX_USBNX_DMA0_OUTB_CHN0(usb->index) + channel*8, dma_address);
+ __cvmx_usb_write_csr64(usb, CVMX_USBNX_DMA0_INB_CHN0(usb->index) + channel*8, dma_address);
+ }
+
+ /* Setup both the size of the transfer and the SPLIT characteristics */
+ {
+ cvmx_usbcx_hcspltx_t usbc_hcsplt = {.u32 = 0};
+ cvmx_usbcx_hctsizx_t usbc_hctsiz = {.u32 = 0};
+ int packets_to_transfer;
+ int bytes_to_transfer = transaction->buffer_length - transaction->actual_bytes;
+
+ /* ISOCHRONOUS transactions store each individual transfer size in the
+ packet structure, not the global buffer_length */
+ if (transaction->type == CVMX_USB_TRANSFER_ISOCHRONOUS)
+ bytes_to_transfer = transaction->iso_packets[0].length - transaction->actual_bytes;
+
+ /* We need to do split transactions when we are talking to non high
+ speed devices that are behind a high speed hub */
+ if (__cvmx_usb_pipe_needs_split(usb, pipe)) {
+ /* On the start split phase (stage is even) record the frame number we
+ will need to send the split complete. We only store the lower two bits
+ since the time ahead can only be two frames */
+ if ((transaction->stage&1) == 0) {
+ if (transaction->type == CVMX_USB_TRANSFER_BULK)
+ pipe->split_sc_frame = (usb->frame_number + 1) & 0x7f;
+ else
+ pipe->split_sc_frame = (usb->frame_number + 2) & 0x7f;
+ } else
+ pipe->split_sc_frame = -1;
+
+ usbc_hcsplt.s.spltena = 1;
+ usbc_hcsplt.s.hubaddr = pipe->hub_device_addr;
+ usbc_hcsplt.s.prtaddr = pipe->hub_port;
+ usbc_hcsplt.s.compsplt = (transaction->stage == CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE);
+
+ /* SPLIT transactions can only ever transmit one data packet so
+ limit the transfer size to the max packet size */
+ if (bytes_to_transfer > pipe->max_packet)
+ bytes_to_transfer = pipe->max_packet;
+
+ /* ISOCHRONOUS OUT splits are unique in that they limit
+ data transfers to 188 byte chunks representing the
+ begin/middle/end of the data or all */
+ if (!usbc_hcsplt.s.compsplt &&
+ (pipe->transfer_dir == CVMX_USB_DIRECTION_OUT) &&
+ (pipe->transfer_type == CVMX_USB_TRANSFER_ISOCHRONOUS)) {
+ /* Clear the split complete frame number as there isn't going
+ to be a split complete */
+ pipe->split_sc_frame = -1;
+ /* See if we've started this transfer and sent data */
+ if (transaction->actual_bytes == 0) {
+ /* Nothing sent yet, this is either a begin or the
+ entire payload */
+ if (bytes_to_transfer <= 188)
+ usbc_hcsplt.s.xactpos = 3; /* Entire payload in one go */
+ else
+ usbc_hcsplt.s.xactpos = 2; /* First part of payload */
+ } else {
+ /* Continuing the previous data, we must either be
+ in the middle or at the end */
+ if (bytes_to_transfer <= 188)
+ usbc_hcsplt.s.xactpos = 1; /* End of payload */
+ else
+ usbc_hcsplt.s.xactpos = 0; /* Middle of payload */
+ }
+ /* Again, the transfer size is limited to 188 bytes */
+ if (bytes_to_transfer > 188)
+ bytes_to_transfer = 188;
+ }
+ }
+
+ /* Make sure the transfer never exceeds the byte limit of the hardware.
+ Further bytes will be sent as continued transactions */
+ if (bytes_to_transfer > MAX_TRANSFER_BYTES) {
+ /* Round MAX_TRANSFER_BYTES to a multiple of out packet size */
+ bytes_to_transfer = MAX_TRANSFER_BYTES / pipe->max_packet;
+ bytes_to_transfer *= pipe->max_packet;
+ }
+
+ /* Calculate the number of packets to transfer. If the length is zero
+ we still need to transfer one packet */
+ packets_to_transfer = (bytes_to_transfer + pipe->max_packet - 1) / pipe->max_packet;
+ if (packets_to_transfer == 0)
+ packets_to_transfer = 1;
+ else if ((packets_to_transfer > 1) && (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA)) {
+ /* Limit to one packet when not using DMA. Channels must be restarted
+ between every packet for IN transactions, so there is no reason to
+ do multiple packets in a row */
+ packets_to_transfer = 1;
+ bytes_to_transfer = packets_to_transfer * pipe->max_packet;
+ } else if (packets_to_transfer > MAX_TRANSFER_PACKETS) {
+ /* Limit the number of packet and data transferred to what the
+ hardware can handle */
+ packets_to_transfer = MAX_TRANSFER_PACKETS;
+ bytes_to_transfer = packets_to_transfer * pipe->max_packet;
+ }
+
+ usbc_hctsiz.s.xfersize = bytes_to_transfer;
+ usbc_hctsiz.s.pktcnt = packets_to_transfer;
+
+ /* Update the DATA0/DATA1 toggle */
+ usbc_hctsiz.s.pid = __cvmx_usb_get_data_pid(pipe);
+ /* High speed pipes may need a hardware ping before they start */
+ if (pipe->flags & __CVMX_USB_PIPE_FLAGS_NEED_PING)
+ usbc_hctsiz.s.dopng = 1;
+
+ __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCSPLTX(channel, usb->index), usbc_hcsplt.u32);
+ __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCTSIZX(channel, usb->index), usbc_hctsiz.u32);
+ }
+
+ /* Setup the Host Channel Characteristics Register */
+ {
+ cvmx_usbcx_hccharx_t usbc_hcchar = {.u32 = 0};
+
+ /* Set the startframe odd/even properly. This is only used for periodic */
+ usbc_hcchar.s.oddfrm = usb->frame_number&1;
+
+ /* Set the number of back to back packets allowed by this endpoint.
+ Split transactions interpret "ec" as the number of immediate
+ retries of failure. These retries happen too quickly, so we
+ disable these entirely for splits */
+ if (__cvmx_usb_pipe_needs_split(usb, pipe))
+ usbc_hcchar.s.ec = 1;
+ else if (pipe->multi_count < 1)
+ usbc_hcchar.s.ec = 1;
+ else if (pipe->multi_count > 3)
+ usbc_hcchar.s.ec = 3;
+ else
+ usbc_hcchar.s.ec = pipe->multi_count;
+
+ /* Set the rest of the endpoint specific settings */
+ usbc_hcchar.s.devaddr = pipe->device_addr;
+ usbc_hcchar.s.eptype = transaction->type;
+ usbc_hcchar.s.lspddev = (pipe->device_speed == CVMX_USB_SPEED_LOW);
+ usbc_hcchar.s.epdir = pipe->transfer_dir;
+ usbc_hcchar.s.epnum = pipe->endpoint_num;
+ usbc_hcchar.s.mps = pipe->max_packet;
+ __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCCHARX(channel, usb->index), usbc_hcchar.u32);
+ }
+
+ /* Do transaction type specific fixups as needed */
+ switch (transaction->type) {
+ case CVMX_USB_TRANSFER_CONTROL:
+ __cvmx_usb_start_channel_control(usb, channel, pipe);
+ break;
+ case CVMX_USB_TRANSFER_BULK:
+ case CVMX_USB_TRANSFER_INTERRUPT:
+ break;
+ case CVMX_USB_TRANSFER_ISOCHRONOUS:
+ if (!__cvmx_usb_pipe_needs_split(usb, pipe)) {
+ /* ISO transactions require different PIDs depending on direction
+ and how many packets are needed */
+ if (pipe->transfer_dir == CVMX_USB_DIRECTION_OUT) {
+ if (pipe->multi_count < 2) /* Need DATA0 */
+ USB_SET_FIELD32(CVMX_USBCX_HCTSIZX(channel, usb->index), cvmx_usbcx_hctsizx_t, pid, 0);
+ else /* Need MDATA */
+ USB_SET_FIELD32(CVMX_USBCX_HCTSIZX(channel, usb->index), cvmx_usbcx_hctsizx_t, pid, 3);
+ }
+ }
+ break;
+ }
+ {
+ cvmx_usbcx_hctsizx_t usbc_hctsiz = {.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCTSIZX(channel, usb->index))};
+ transaction->xfersize = usbc_hctsiz.s.xfersize;
+ transaction->pktcnt = usbc_hctsiz.s.pktcnt;
+ }
+ /* Remeber when we start a split transaction */
+ if (__cvmx_usb_pipe_needs_split(usb, pipe))
+ usb->active_split = transaction;
+ USB_SET_FIELD32(CVMX_USBCX_HCCHARX(channel, usb->index), cvmx_usbcx_hccharx_t, chena, 1);
+ if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA)
+ __cvmx_usb_fill_tx_fifo(usb, channel);
+ return;
}
/**
* @INTERNAL
* Find a pipe that is ready to be scheduled to hardware.
- * @param usb USB device state populated by
- * cvmx_usb_initialize().
- * @param list Pipe list to search
+ * @param usb USB device state populated by
+ * cvmx_usb_initialize().
+ * @param list Pipe list to search
* @param current_frame
- * Frame counter to use as a time reference.
+ * Frame counter to use as a time reference.
*
* @return Pipe or NULL if none are ready
*/
static cvmx_usb_pipe_t *__cvmx_usb_find_ready_pipe(cvmx_usb_internal_state_t *usb, cvmx_usb_pipe_list_t *list, uint64_t current_frame)
{
- cvmx_usb_pipe_t *pipe = list->head;
- while (pipe) {
- if (!(pipe->flags & __CVMX_USB_PIPE_FLAGS_SCHEDULED) && pipe->head &&
- (pipe->next_tx_frame <= current_frame) &&
- ((pipe->split_sc_frame == -1) || ((((int)current_frame - (int)pipe->split_sc_frame) & 0x7f) < 0x40)) &&
- (!usb->active_split || (usb->active_split == pipe->head))) {
- CVMX_PREFETCH(pipe, 128);
- CVMX_PREFETCH(pipe->head, 0);
- return pipe;
- }
- pipe = pipe->next;
- }
- return NULL;
+ cvmx_usb_pipe_t *pipe = list->head;
+ while (pipe) {
+ if (!(pipe->flags & __CVMX_USB_PIPE_FLAGS_SCHEDULED) && pipe->head &&
+ (pipe->next_tx_frame <= current_frame) &&
+ ((pipe->split_sc_frame == -1) || ((((int)current_frame - (int)pipe->split_sc_frame) & 0x7f) < 0x40)) &&
+ (!usb->active_split || (usb->active_split == pipe->head))) {
+ CVMX_PREFETCH(pipe, 128);
+ CVMX_PREFETCH(pipe->head, 0);
+ return pipe;
+ }
+ pipe = pipe->next;
+ }
+ return NULL;
}
* Called whenever a pipe might need to be scheduled to the
* hardware.
*
- * @param usb USB device state populated by
- * cvmx_usb_initialize().
+ * @param usb USB device state populated by
+ * cvmx_usb_initialize().
* @param is_sof True if this schedule was called on a SOF interrupt.
*/
static void __cvmx_usb_schedule(cvmx_usb_internal_state_t *usb, int is_sof)
{
- int channel;
- cvmx_usb_pipe_t *pipe;
- int need_sof;
- cvmx_usb_transfer_t ttype;
-
- if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) {
- /* Without DMA we need to be careful to not schedule something at the end of a frame and cause an overrun */
- cvmx_usbcx_hfnum_t hfnum = {.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HFNUM(usb->index))};
- cvmx_usbcx_hfir_t hfir = {.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HFIR(usb->index))};
- if (hfnum.s.frrem < hfir.s.frint/4)
- goto done;
- }
-
- while (usb->idle_hardware_channels) {
- /* Find an idle channel */
- CVMX_CLZ(channel, usb->idle_hardware_channels);
- channel = 31 - channel;
- if (unlikely(channel > 7))
- break;
-
- /* Find a pipe needing service */
- pipe = NULL;
- if (is_sof) {
- /* Only process periodic pipes on SOF interrupts. This way we are
- sure that the periodic data is sent in the beginning of the
- frame */
- pipe = __cvmx_usb_find_ready_pipe(usb, usb->active_pipes + CVMX_USB_TRANSFER_ISOCHRONOUS, usb->frame_number);
- if (likely(!pipe))
- pipe = __cvmx_usb_find_ready_pipe(usb, usb->active_pipes + CVMX_USB_TRANSFER_INTERRUPT, usb->frame_number);
- }
- if (likely(!pipe)) {
- pipe = __cvmx_usb_find_ready_pipe(usb, usb->active_pipes + CVMX_USB_TRANSFER_CONTROL, usb->frame_number);
- if (likely(!pipe))
- pipe = __cvmx_usb_find_ready_pipe(usb, usb->active_pipes + CVMX_USB_TRANSFER_BULK, usb->frame_number);
- }
- if (!pipe)
- break;
-
- __cvmx_usb_start_channel(usb, channel, pipe);
- }
+ int channel;
+ cvmx_usb_pipe_t *pipe;
+ int need_sof;
+ cvmx_usb_transfer_t ttype;
+
+ if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) {
+ /* Without DMA we need to be careful to not schedule something at the end of a frame and cause an overrun */
+ cvmx_usbcx_hfnum_t hfnum = {.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HFNUM(usb->index))};
+ cvmx_usbcx_hfir_t hfir = {.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HFIR(usb->index))};
+ if (hfnum.s.frrem < hfir.s.frint/4)
+ goto done;
+ }
+
+ while (usb->idle_hardware_channels) {
+ /* Find an idle channel */
+ CVMX_CLZ(channel, usb->idle_hardware_channels);
+ channel = 31 - channel;
+ if (unlikely(channel > 7))
+ break;
+
+ /* Find a pipe needing service */
+ pipe = NULL;
+ if (is_sof) {
+ /* Only process periodic pipes on SOF interrupts. This way we are
+ sure that the periodic data is sent in the beginning of the
+ frame */
+ pipe = __cvmx_usb_find_ready_pipe(usb, usb->active_pipes + CVMX_USB_TRANSFER_ISOCHRONOUS, usb->frame_number);
+ if (likely(!pipe))
+ pipe = __cvmx_usb_find_ready_pipe(usb, usb->active_pipes + CVMX_USB_TRANSFER_INTERRUPT, usb->frame_number);
+ }
+ if (likely(!pipe)) {
+ pipe = __cvmx_usb_find_ready_pipe(usb, usb->active_pipes + CVMX_USB_TRANSFER_CONTROL, usb->frame_number);
+ if (likely(!pipe))
+ pipe = __cvmx_usb_find_ready_pipe(usb, usb->active_pipes + CVMX_USB_TRANSFER_BULK, usb->frame_number);
+ }
+ if (!pipe)
+ break;
+
+ __cvmx_usb_start_channel(usb, channel, pipe);
+ }
done:
- /* Only enable SOF interrupts when we have transactions pending in the
- future that might need to be scheduled */
- need_sof = 0;
- for (ttype=CVMX_USB_TRANSFER_CONTROL; ttype<=CVMX_USB_TRANSFER_INTERRUPT; ttype++) {
- pipe = usb->active_pipes[ttype].head;
- while (pipe) {
- if (pipe->next_tx_frame > usb->frame_number) {
- need_sof = 1;
- break;
- }
- pipe=pipe->next;
- }
- }
- USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), cvmx_usbcx_gintmsk_t, sofmsk, need_sof);
- return;
+ /* Only enable SOF interrupts when we have transactions pending in the
+ future that might need to be scheduled */
+ need_sof = 0;
+ for (ttype = CVMX_USB_TRANSFER_CONTROL; ttype <= CVMX_USB_TRANSFER_INTERRUPT; ttype++) {
+ pipe = usb->active_pipes[ttype].head;
+ while (pipe) {
+ if (pipe->next_tx_frame > usb->frame_number) {
+ need_sof = 1;
+ break;
+ }
+ pipe = pipe->next;
+ }
+ }
+ USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), cvmx_usbcx_gintmsk_t, sofmsk, need_sof);
+ return;
}
* @INTERNAL
* Call a user's callback for a specific reason.
*
- * @param usb USB device state populated by
- * cvmx_usb_initialize().
- * @param pipe Pipe the callback is for or NULL
+ * @param usb USB device state populated by
+ * cvmx_usb_initialize().
+ * @param pipe Pipe the callback is for or NULL
* @param transaction
- * Transaction the callback is for or NULL
+ * Transaction the callback is for or NULL
* @param reason Reason this callback is being called
* @param complete_code
- * Completion code for the transaction, if any
+ * Completion code for the transaction, if any
*/
static void __cvmx_usb_perform_callback(cvmx_usb_internal_state_t *usb,
- cvmx_usb_pipe_t *pipe,
- cvmx_usb_transaction_t *transaction,
- cvmx_usb_callback_t reason,
- cvmx_usb_complete_t complete_code)
+ cvmx_usb_pipe_t *pipe,
+ cvmx_usb_transaction_t *transaction,
+ cvmx_usb_callback_t reason,
+ cvmx_usb_complete_t complete_code)
{
- cvmx_usb_callback_func_t callback = usb->callback[reason];
- void *user_data = usb->callback_data[reason];
- int submit_handle = -1;
- int pipe_handle = -1;
- int bytes_transferred = 0;
-
- if (pipe)
- pipe_handle = __cvmx_usb_get_pipe_handle(usb, pipe);
-
- if (transaction) {
- submit_handle = __cvmx_usb_get_submit_handle(usb, transaction);
- bytes_transferred = transaction->actual_bytes;
- /* Transactions are allowed to override the default callback */
- if ((reason == CVMX_USB_CALLBACK_TRANSFER_COMPLETE) && transaction->callback) {
- callback = transaction->callback;
- user_data = transaction->callback_data;
- }
- }
-
- if (!callback)
- return;
-
- callback((cvmx_usb_state_t *)usb, reason, complete_code, pipe_handle, submit_handle,
- bytes_transferred, user_data);
+ cvmx_usb_callback_func_t callback = usb->callback[reason];
+ void *user_data = usb->callback_data[reason];
+ int submit_handle = -1;
+ int pipe_handle = -1;
+ int bytes_transferred = 0;
+
+ if (pipe)
+ pipe_handle = __cvmx_usb_get_pipe_handle(usb, pipe);
+
+ if (transaction) {
+ submit_handle = __cvmx_usb_get_submit_handle(usb, transaction);
+ bytes_transferred = transaction->actual_bytes;
+ /* Transactions are allowed to override the default callback */
+ if ((reason == CVMX_USB_CALLBACK_TRANSFER_COMPLETE) && transaction->callback) {
+ callback = transaction->callback;
+ user_data = transaction->callback_data;
+ }
+ }
+
+ if (!callback)
+ return;
+
+ callback((cvmx_usb_state_t *)usb, reason, complete_code, pipe_handle, submit_handle,
+ bytes_transferred, user_data);
}
* Signal the completion of a transaction and free it. The
* transaction will be removed from the pipe transaction list.
*
- * @param usb USB device state populated by
- * cvmx_usb_initialize().
- * @param pipe Pipe the transaction is on
+ * @param usb USB device state populated by
+ * cvmx_usb_initialize().
+ * @param pipe Pipe the transaction is on
* @param transaction
- * Transaction that completed
+ * Transaction that completed
* @param complete_code
- * Completion code
+ * Completion code
*/
-static void __cvmx_usb_perform_complete(cvmx_usb_internal_state_t * usb,
- cvmx_usb_pipe_t *pipe,
- cvmx_usb_transaction_t *transaction,
- cvmx_usb_complete_t complete_code)
+static void __cvmx_usb_perform_complete(cvmx_usb_internal_state_t *usb,
+ cvmx_usb_pipe_t *pipe,
+ cvmx_usb_transaction_t *transaction,
+ cvmx_usb_complete_t complete_code)
{
- /* If this was a split then clear our split in progress marker */
- if (usb->active_split == transaction)
- usb->active_split = NULL;
-
- /* Isochronous transactions need extra processing as they might not be done
- after a single data transfer */
- if (unlikely(transaction->type == CVMX_USB_TRANSFER_ISOCHRONOUS)) {
- /* Update the number of bytes transferred in this ISO packet */
- transaction->iso_packets[0].length = transaction->actual_bytes;
- transaction->iso_packets[0].status = complete_code;
-
- /* If there are more ISOs pending and we succeeded, schedule the next
- one */
- if ((transaction->iso_number_packets > 1) && (complete_code == CVMX_USB_COMPLETE_SUCCESS)) {
- transaction->actual_bytes = 0; /* No bytes transferred for this packet as of yet */
- transaction->iso_number_packets--; /* One less ISO waiting to transfer */
- transaction->iso_packets++; /* Increment to the next location in our packet array */
- transaction->stage = CVMX_USB_STAGE_NON_CONTROL;
- goto done;
- }
- }
-
- /* Remove the transaction from the pipe list */
- if (transaction->next)
- transaction->next->prev = transaction->prev;
- else
- pipe->tail = transaction->prev;
- if (transaction->prev)
- transaction->prev->next = transaction->next;
- else
- pipe->head = transaction->next;
- if (!pipe->head) {
- __cvmx_usb_remove_pipe(usb->active_pipes + pipe->transfer_type, pipe);
- __cvmx_usb_append_pipe(&usb->idle_pipes, pipe);
-
- }
- __cvmx_usb_perform_callback(usb, pipe, transaction,
- CVMX_USB_CALLBACK_TRANSFER_COMPLETE,
- complete_code);
- __cvmx_usb_free_transaction(usb, transaction);
+ /* If this was a split then clear our split in progress marker */
+ if (usb->active_split == transaction)
+ usb->active_split = NULL;
+
+ /* Isochronous transactions need extra processing as they might not be done
+ after a single data transfer */
+ if (unlikely(transaction->type == CVMX_USB_TRANSFER_ISOCHRONOUS)) {
+ /* Update the number of bytes transferred in this ISO packet */
+ transaction->iso_packets[0].length = transaction->actual_bytes;
+ transaction->iso_packets[0].status = complete_code;
+
+ /* If there are more ISOs pending and we succeeded, schedule the next
+ one */
+ if ((transaction->iso_number_packets > 1) && (complete_code == CVMX_USB_COMPLETE_SUCCESS)) {
+ transaction->actual_bytes = 0; /* No bytes transferred for this packet as of yet */
+ transaction->iso_number_packets--; /* One less ISO waiting to transfer */
+ transaction->iso_packets++; /* Increment to the next location in our packet array */
+ transaction->stage = CVMX_USB_STAGE_NON_CONTROL;
+ goto done;
+ }
+ }
+
+ /* Remove the transaction from the pipe list */
+ if (transaction->next)
+ transaction->next->prev = transaction->prev;
+ else
+ pipe->tail = transaction->prev;
+ if (transaction->prev)
+ transaction->prev->next = transaction->next;
+ else
+ pipe->head = transaction->next;
+ if (!pipe->head) {
+ __cvmx_usb_remove_pipe(usb->active_pipes + pipe->transfer_type, pipe);
+ __cvmx_usb_append_pipe(&usb->idle_pipes, pipe);
+
+ }
+ __cvmx_usb_perform_callback(usb, pipe, transaction,
+ CVMX_USB_CALLBACK_TRANSFER_COMPLETE,
+ complete_code);
+ __cvmx_usb_free_transaction(usb, transaction);
done:
- return;
+ return;
}
*
* @param usb
* @param pipe_handle
- * Which pipe to submit to. Will be validated in this function.
- * @param type Transaction type
- * @param flags Flags for the transaction
+ * Which pipe to submit to. Will be validated in this function.
+ * @param type Transaction type
+ * @param flags Flags for the transaction
* @param buffer User buffer for the transaction
* @param buffer_length
- * User buffer's length in bytes
+ * User buffer's length in bytes
* @param control_header
- * For control transactions, the 8 byte standard header
+ * For control transactions, the 8 byte standard header
* @param iso_start_frame
- * For ISO transactions, the start frame
+ * For ISO transactions, the start frame
* @param iso_number_packets
- * For ISO, the number of packet in the transaction.
+ * For ISO, the number of packet in the transaction.
* @param iso_packets
- * A description of each ISO packet
+ * A description of each ISO packet
* @param callback User callback to call when the transaction completes
* @param user_data User's data for the callback
*
* @return Submit handle or negative on failure. Matches the result
- * in the external API.
+ * in the external API.
*/
static int __cvmx_usb_submit_transaction(cvmx_usb_internal_state_t *usb,
- int pipe_handle,
- cvmx_usb_transfer_t type,
- int flags,
- uint64_t buffer,
- int buffer_length,
- uint64_t control_header,
- int iso_start_frame,
- int iso_number_packets,
- cvmx_usb_iso_packet_t *iso_packets,
- cvmx_usb_callback_func_t callback,
- void *user_data)
+ int pipe_handle,
+ cvmx_usb_transfer_t type,
+ int flags,
+ uint64_t buffer,
+ int buffer_length,
+ uint64_t control_header,
+ int iso_start_frame,
+ int iso_number_packets,
+ cvmx_usb_iso_packet_t *iso_packets,
+ cvmx_usb_callback_func_t callback,
+ void *user_data)
{
- int submit_handle;
- cvmx_usb_transaction_t *transaction;
- cvmx_usb_pipe_t *pipe = usb->pipe + pipe_handle;
-
- if (unlikely((pipe_handle < 0) || (pipe_handle >= MAX_PIPES)))
- return -EINVAL;
- /* Fail if the pipe isn't open */
- if (unlikely((pipe->flags & __CVMX_USB_PIPE_FLAGS_OPEN) == 0))
- return -EINVAL;
- if (unlikely(pipe->transfer_type != type))
- return -EINVAL;
-
- transaction = __cvmx_usb_alloc_transaction(usb);
- if (unlikely(!transaction))
- return -ENOMEM;
-
- transaction->type = type;
- transaction->flags |= flags;
- transaction->buffer = buffer;
- transaction->buffer_length = buffer_length;
- transaction->control_header = control_header;
- transaction->iso_start_frame = iso_start_frame; // FIXME: This is not used, implement it
- transaction->iso_number_packets = iso_number_packets;
- transaction->iso_packets = iso_packets;
- transaction->callback = callback;
- transaction->callback_data = user_data;
- if (transaction->type == CVMX_USB_TRANSFER_CONTROL)
- transaction->stage = CVMX_USB_STAGE_SETUP;
- else
- transaction->stage = CVMX_USB_STAGE_NON_CONTROL;
-
- transaction->next = NULL;
- if (pipe->tail) {
- transaction->prev = pipe->tail;
- transaction->prev->next = transaction;
- }
- else {
- if (pipe->next_tx_frame < usb->frame_number)
- pipe->next_tx_frame = usb->frame_number + pipe->interval -
- (usb->frame_number - pipe->next_tx_frame) % pipe->interval;
- transaction->prev = NULL;
- pipe->head = transaction;
- __cvmx_usb_remove_pipe(&usb->idle_pipes, pipe);
- __cvmx_usb_append_pipe(usb->active_pipes + pipe->transfer_type, pipe);
- }
- pipe->tail = transaction;
-
- submit_handle = __cvmx_usb_get_submit_handle(usb, transaction);
-
- /* We may need to schedule the pipe if this was the head of the pipe */
- if (!transaction->prev)
- __cvmx_usb_schedule(usb, 0);
-
- return submit_handle;
+ int submit_handle;
+ cvmx_usb_transaction_t *transaction;
+ cvmx_usb_pipe_t *pipe = usb->pipe + pipe_handle;
+
+ if (unlikely((pipe_handle < 0) || (pipe_handle >= MAX_PIPES)))
+ return -EINVAL;
+ /* Fail if the pipe isn't open */
+ if (unlikely((pipe->flags & __CVMX_USB_PIPE_FLAGS_OPEN) == 0))
+ return -EINVAL;
+ if (unlikely(pipe->transfer_type != type))
+ return -EINVAL;
+
+ transaction = __cvmx_usb_alloc_transaction(usb);
+ if (unlikely(!transaction))
+ return -ENOMEM;
+
+ transaction->type = type;
+ transaction->flags |= flags;
+ transaction->buffer = buffer;
+ transaction->buffer_length = buffer_length;
+ transaction->control_header = control_header;
+ transaction->iso_start_frame = iso_start_frame; // FIXME: This is not used, implement it
+ transaction->iso_number_packets = iso_number_packets;
+ transaction->iso_packets = iso_packets;
+ transaction->callback = callback;
+ transaction->callback_data = user_data;
+ if (transaction->type == CVMX_USB_TRANSFER_CONTROL)
+ transaction->stage = CVMX_USB_STAGE_SETUP;
+ else
+ transaction->stage = CVMX_USB_STAGE_NON_CONTROL;
+
+ transaction->next = NULL;
+ if (pipe->tail) {
+ transaction->prev = pipe->tail;
+ transaction->prev->next = transaction;
+ } else {
+ if (pipe->next_tx_frame < usb->frame_number)
+ pipe->next_tx_frame = usb->frame_number + pipe->interval -
+ (usb->frame_number - pipe->next_tx_frame) % pipe->interval;
+ transaction->prev = NULL;
+ pipe->head = transaction;
+ __cvmx_usb_remove_pipe(&usb->idle_pipes, pipe);
+ __cvmx_usb_append_pipe(usb->active_pipes + pipe->transfer_type, pipe);
+ }
+ pipe->tail = transaction;
+
+ submit_handle = __cvmx_usb_get_submit_handle(usb, transaction);
+
+ /* We may need to schedule the pipe if this was the head of the pipe */
+ if (!transaction->prev)
+ __cvmx_usb_schedule(usb, 0);
+
+ return submit_handle;
}
/**
* Call to submit a USB Bulk transfer to a pipe.
*
- * @param state USB device state populated by
- * cvmx_usb_initialize().
+ * @param state USB device state populated by
+ * cvmx_usb_initialize().
* @param pipe_handle
- * Handle to the pipe for the transfer.
+ * Handle to the pipe for the transfer.
* @param buffer Physical address of the data buffer in
- * memory. Note that this is NOT A POINTER, but
- * the full 64bit physical address of the
- * buffer. This may be zero if buffer_length is
- * zero.
+ * memory. Note that this is NOT A POINTER, but
+ * the full 64bit physical address of the
+ * buffer. This may be zero if buffer_length is
+ * zero.
* @param buffer_length
- * Length of buffer in bytes.
+ * Length of buffer in bytes.
* @param callback Function to call when this transaction
- * completes. If the return value of this
- * function isn't an error, then this function
- * is guaranteed to be called when the
- * transaction completes. If this parameter is
- * NULL, then the generic callback registered
- * through cvmx_usb_register_callback is
- * called. If both are NULL, then there is no
- * way to know when a transaction completes.
+ * completes. If the return value of this
+ * function isn't an error, then this function
+ * is guaranteed to be called when the
+ * transaction completes. If this parameter is
+ * NULL, then the generic callback registered
+ * through cvmx_usb_register_callback is
+ * called. If both are NULL, then there is no
+ * way to know when a transaction completes.
* @param user_data User supplied data returned when the
- * callback is called. This is only used if
- * callback in not NULL.
+ * callback is called. This is only used if
+ * callback in not NULL.
*
* @return A submitted transaction handle or negative on
- * failure. Negative values are error codes.
+ * failure. Negative values are error codes.
*/
int cvmx_usb_submit_bulk(cvmx_usb_state_t *state, int pipe_handle,
- uint64_t buffer, int buffer_length,
- cvmx_usb_callback_func_t callback,
- void *user_data)
+ uint64_t buffer, int buffer_length,
+ cvmx_usb_callback_func_t callback,
+ void *user_data)
{
- int submit_handle;
- cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t*)state;
-
- /* Pipe handle checking is done later in a common place */
- if (unlikely(!buffer))
- return -EINVAL;
- if (unlikely(buffer_length < 0))
- return -EINVAL;
-
- submit_handle = __cvmx_usb_submit_transaction(usb, pipe_handle,
- CVMX_USB_TRANSFER_BULK,
- 0, /* flags */
- buffer,
- buffer_length,
- 0, /* control_header */
- 0, /* iso_start_frame */
- 0, /* iso_number_packets */
- NULL, /* iso_packets */
- callback,
- user_data);
- return submit_handle;
+ int submit_handle;
+ cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t *)state;
+
+ /* Pipe handle checking is done later in a common place */
+ if (unlikely(!buffer))
+ return -EINVAL;
+ if (unlikely(buffer_length < 0))
+ return -EINVAL;
+
+ submit_handle = __cvmx_usb_submit_transaction(usb, pipe_handle,
+ CVMX_USB_TRANSFER_BULK,
+ 0, /* flags */
+ buffer,
+ buffer_length,
+ 0, /* control_header */
+ 0, /* iso_start_frame */
+ 0, /* iso_number_packets */
+ NULL, /* iso_packets */
+ callback,
+ user_data);
+ return submit_handle;
}
/**
* Call to submit a USB Interrupt transfer to a pipe.
*
- * @param state USB device state populated by
- * cvmx_usb_initialize().
+ * @param state USB device state populated by
+ * cvmx_usb_initialize().
* @param pipe_handle
- * Handle to the pipe for the transfer.
+ * Handle to the pipe for the transfer.
* @param buffer Physical address of the data buffer in
- * memory. Note that this is NOT A POINTER, but
- * the full 64bit physical address of the
- * buffer. This may be zero if buffer_length is
- * zero.
+ * memory. Note that this is NOT A POINTER, but
+ * the full 64bit physical address of the
+ * buffer. This may be zero if buffer_length is
+ * zero.
* @param buffer_length
- * Length of buffer in bytes.
+ * Length of buffer in bytes.
* @param callback Function to call when this transaction
- * completes. If the return value of this
- * function isn't an error, then this function
- * is guaranteed to be called when the
- * transaction completes. If this parameter is
- * NULL, then the generic callback registered
- * through cvmx_usb_register_callback is
- * called. If both are NULL, then there is no
- * way to know when a transaction completes.
+ * completes. If the return value of this
+ * function isn't an error, then this function
+ * is guaranteed to be called when the
+ * transaction completes. If this parameter is
+ * NULL, then the generic callback registered
+ * through cvmx_usb_register_callback is
+ * called. If both are NULL, then there is no
+ * way to know when a transaction completes.
* @param user_data User supplied data returned when the
- * callback is called. This is only used if
- * callback in not NULL.
+ * callback is called. This is only used if
+ * callback in not NULL.
*
* @return A submitted transaction handle or negative on
- * failure. Negative values are error codes.
+ * failure. Negative values are error codes.
*/
int cvmx_usb_submit_interrupt(cvmx_usb_state_t *state, int pipe_handle,
- uint64_t buffer, int buffer_length,
- cvmx_usb_callback_func_t callback,
- void *user_data)
+ uint64_t buffer, int buffer_length,
+ cvmx_usb_callback_func_t callback,
+ void *user_data)
{
- int submit_handle;
- cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t*)state;
-
- /* Pipe handle checking is done later in a common place */
- if (unlikely(!buffer))
- return -EINVAL;
- if (unlikely(buffer_length < 0))
- return -EINVAL;
-
- submit_handle = __cvmx_usb_submit_transaction(usb, pipe_handle,
- CVMX_USB_TRANSFER_INTERRUPT,
- 0, /* flags */
- buffer,
- buffer_length,
- 0, /* control_header */
- 0, /* iso_start_frame */
- 0, /* iso_number_packets */
- NULL, /* iso_packets */
- callback,
- user_data);
- return submit_handle;
+ int submit_handle;
+ cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t *)state;
+
+ /* Pipe handle checking is done later in a common place */
+ if (unlikely(!buffer))
+ return -EINVAL;
+ if (unlikely(buffer_length < 0))
+ return -EINVAL;
+
+ submit_handle = __cvmx_usb_submit_transaction(usb, pipe_handle,
+ CVMX_USB_TRANSFER_INTERRUPT,
+ 0, /* flags */
+ buffer,
+ buffer_length,
+ 0, /* control_header */
+ 0, /* iso_start_frame */
+ 0, /* iso_number_packets */
+ NULL, /* iso_packets */
+ callback,
+ user_data);
+ return submit_handle;
}
/**
* Call to submit a USB Control transfer to a pipe.
*
- * @param state USB device state populated by
- * cvmx_usb_initialize().
+ * @param state USB device state populated by
+ * cvmx_usb_initialize().
* @param pipe_handle
- * Handle to the pipe for the transfer.
+ * Handle to the pipe for the transfer.
* @param control_header
- * USB 8 byte control header physical address.
- * Note that this is NOT A POINTER, but the
- * full 64bit physical address of the buffer.
+ * USB 8 byte control header physical address.
+ * Note that this is NOT A POINTER, but the
+ * full 64bit physical address of the buffer.
* @param buffer Physical address of the data buffer in
- * memory. Note that this is NOT A POINTER, but
- * the full 64bit physical address of the
- * buffer. This may be zero if buffer_length is
- * zero.
+ * memory. Note that this is NOT A POINTER, but
+ * the full 64bit physical address of the
+ * buffer. This may be zero if buffer_length is
+ * zero.
* @param buffer_length
- * Length of buffer in bytes.
+ * Length of buffer in bytes.
* @param callback Function to call when this transaction
- * completes. If the return value of this
- * function isn't an error, then this function
- * is guaranteed to be called when the
- * transaction completes. If this parameter is
- * NULL, then the generic callback registered
- * through cvmx_usb_register_callback is
- * called. If both are NULL, then there is no
- * way to know when a transaction completes.
+ * completes. If the return value of this
+ * function isn't an error, then this function
+ * is guaranteed to be called when the
+ * transaction completes. If this parameter is
+ * NULL, then the generic callback registered
+ * through cvmx_usb_register_callback is
+ * called. If both are NULL, then there is no
+ * way to know when a transaction completes.
* @param user_data User supplied data returned when the
- * callback is called. This is only used if
- * callback in not NULL.
+ * callback is called. This is only used if
+ * callback in not NULL.
*
* @return A submitted transaction handle or negative on
- * failure. Negative values are error codes.
+ * failure. Negative values are error codes.
*/
int cvmx_usb_submit_control(cvmx_usb_state_t *state, int pipe_handle,
- uint64_t control_header,
- uint64_t buffer, int buffer_length,
- cvmx_usb_callback_func_t callback,
- void *user_data)
+ uint64_t control_header,
+ uint64_t buffer, int buffer_length,
+ cvmx_usb_callback_func_t callback,
+ void *user_data)
{
- int submit_handle;
- cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t*)state;
- cvmx_usb_control_header_t *header = cvmx_phys_to_ptr(control_header);
-
- /* Pipe handle checking is done later in a common place */
- if (unlikely(!control_header))
- return -EINVAL;
- /* Some drivers send a buffer with a zero length. God only knows why */
- if (unlikely(buffer && (buffer_length < 0)))
- return -EINVAL;
- if (unlikely(!buffer && (buffer_length != 0)))
- return -EINVAL;
- if ((header->s.request_type & 0x80) == 0)
- buffer_length = le16_to_cpu(header->s.length);
-
- submit_handle = __cvmx_usb_submit_transaction(usb, pipe_handle,
- CVMX_USB_TRANSFER_CONTROL,
- 0, /* flags */
- buffer,
- buffer_length,
- control_header,
- 0, /* iso_start_frame */
- 0, /* iso_number_packets */
- NULL, /* iso_packets */
- callback,
- user_data);
- return submit_handle;
+ int submit_handle;
+ cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t *)state;
+ cvmx_usb_control_header_t *header = cvmx_phys_to_ptr(control_header);
+
+ /* Pipe handle checking is done later in a common place */
+ if (unlikely(!control_header))
+ return -EINVAL;
+ /* Some drivers send a buffer with a zero length. God only knows why */
+ if (unlikely(buffer && (buffer_length < 0)))
+ return -EINVAL;
+ if (unlikely(!buffer && (buffer_length != 0)))
+ return -EINVAL;
+ if ((header->s.request_type & 0x80) == 0)
+ buffer_length = le16_to_cpu(header->s.length);
+
+ submit_handle = __cvmx_usb_submit_transaction(usb, pipe_handle,
+ CVMX_USB_TRANSFER_CONTROL,
+ 0, /* flags */
+ buffer,
+ buffer_length,
+ control_header,
+ 0, /* iso_start_frame */
+ 0, /* iso_number_packets */
+ NULL, /* iso_packets */
+ callback,
+ user_data);
+ return submit_handle;
}
/**
* Call to submit a USB Isochronous transfer to a pipe.
*
- * @param state USB device state populated by
- * cvmx_usb_initialize().
+ * @param state USB device state populated by
+ * cvmx_usb_initialize().
* @param pipe_handle
- * Handle to the pipe for the transfer.
+ * Handle to the pipe for the transfer.
* @param start_frame
- * Number of frames into the future to schedule
- * this transaction.
- * @param flags Flags to control the transfer. See
- * cvmx_usb_isochronous_flags_t for the flag
- * definitions.
+ * Number of frames into the future to schedule
+ * this transaction.
+ * @param flags Flags to control the transfer. See
+ * cvmx_usb_isochronous_flags_t for the flag
+ * definitions.
* @param number_packets
- * Number of sequential packets to transfer.
- * "packets" is a pointer to an array of this
- * many packet structures.
+ * Number of sequential packets to transfer.
+ * "packets" is a pointer to an array of this
+ * many packet structures.
* @param packets Description of each transfer packet as
- * defined by cvmx_usb_iso_packet_t. The array
- * pointed to here must stay valid until the
- * complete callback is called.
+ * defined by cvmx_usb_iso_packet_t. The array
+ * pointed to here must stay valid until the
+ * complete callback is called.
* @param buffer Physical address of the data buffer in
- * memory. Note that this is NOT A POINTER, but
- * the full 64bit physical address of the
- * buffer. This may be zero if buffer_length is
- * zero.
+ * memory. Note that this is NOT A POINTER, but
+ * the full 64bit physical address of the
+ * buffer. This may be zero if buffer_length is
+ * zero.
* @param buffer_length
- * Length of buffer in bytes.
+ * Length of buffer in bytes.
* @param callback Function to call when this transaction
- * completes. If the return value of this
- * function isn't an error, then this function
- * is guaranteed to be called when the
- * transaction completes. If this parameter is
- * NULL, then the generic callback registered
- * through cvmx_usb_register_callback is
- * called. If both are NULL, then there is no
- * way to know when a transaction completes.
+ * completes. If the return value of this
+ * function isn't an error, then this function
+ * is guaranteed to be called when the
+ * transaction completes. If this parameter is
+ * NULL, then the generic callback registered
+ * through cvmx_usb_register_callback is
+ * called. If both are NULL, then there is no
+ * way to know when a transaction completes.
* @param user_data User supplied data returned when the
- * callback is called. This is only used if
- * callback in not NULL.
+ * callback is called. This is only used if
+ * callback in not NULL.
*
* @return A submitted transaction handle or negative on
- * failure. Negative values are error codes.
+ * failure. Negative values are error codes.
*/
int cvmx_usb_submit_isochronous(cvmx_usb_state_t *state, int pipe_handle,
- int start_frame, int flags,
- int number_packets,
- cvmx_usb_iso_packet_t packets[],
- uint64_t buffer, int buffer_length,
- cvmx_usb_callback_func_t callback,
- void *user_data)
+ int start_frame, int flags,
+ int number_packets,
+ cvmx_usb_iso_packet_t packets[],
+ uint64_t buffer, int buffer_length,
+ cvmx_usb_callback_func_t callback,
+ void *user_data)
{
- int submit_handle;
- cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t*)state;
-
- /* Pipe handle checking is done later in a common place */
- if (unlikely(start_frame < 0))
- return -EINVAL;
- if (unlikely(flags & ~(CVMX_USB_ISOCHRONOUS_FLAGS_ALLOW_SHORT | CVMX_USB_ISOCHRONOUS_FLAGS_ASAP)))
- return -EINVAL;
- if (unlikely(number_packets < 1))
- return -EINVAL;
- if (unlikely(!packets))
- return -EINVAL;
- if (unlikely(!buffer))
- return -EINVAL;
- if (unlikely(buffer_length < 0))
- return -EINVAL;
-
- submit_handle = __cvmx_usb_submit_transaction(usb, pipe_handle,
- CVMX_USB_TRANSFER_ISOCHRONOUS,
- flags,
- buffer,
- buffer_length,
- 0, /* control_header */
- start_frame,
- number_packets,
- packets,
- callback,
- user_data);
- return submit_handle;
+ int submit_handle;
+ cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t *)state;
+
+ /* Pipe handle checking is done later in a common place */
+ if (unlikely(start_frame < 0))
+ return -EINVAL;
+ if (unlikely(flags & ~(CVMX_USB_ISOCHRONOUS_FLAGS_ALLOW_SHORT | CVMX_USB_ISOCHRONOUS_FLAGS_ASAP)))
+ return -EINVAL;
+ if (unlikely(number_packets < 1))
+ return -EINVAL;
+ if (unlikely(!packets))
+ return -EINVAL;
+ if (unlikely(!buffer))
+ return -EINVAL;
+ if (unlikely(buffer_length < 0))
+ return -EINVAL;
+
+ submit_handle = __cvmx_usb_submit_transaction(usb, pipe_handle,
+ CVMX_USB_TRANSFER_ISOCHRONOUS,
+ flags,
+ buffer,
+ buffer_length,
+ 0, /* control_header */
+ start_frame,
+ number_packets,
+ packets,
+ callback,
+ user_data);
+ return submit_handle;
}
* associated callback.
*
* @param state USB device state populated by
- * cvmx_usb_initialize().
+ * cvmx_usb_initialize().
* @param pipe_handle
- * Pipe handle to cancel requests in.
+ * Pipe handle to cancel requests in.
* @param submit_handle
- * Handle to transaction to cancel, returned by the submit function.
+ * Handle to transaction to cancel, returned by the submit function.
*
* @return 0 or a negative error code.
*/
int cvmx_usb_cancel(cvmx_usb_state_t *state, int pipe_handle, int submit_handle)
{
- cvmx_usb_transaction_t *transaction;
- cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t*)state;
- cvmx_usb_pipe_t *pipe = usb->pipe + pipe_handle;
-
- if (unlikely((pipe_handle < 0) || (pipe_handle >= MAX_PIPES)))
- return -EINVAL;
- if (unlikely((submit_handle < 0) || (submit_handle >= MAX_TRANSACTIONS)))
- return -EINVAL;
-
- /* Fail if the pipe isn't open */
- if (unlikely((pipe->flags & __CVMX_USB_PIPE_FLAGS_OPEN) == 0))
- return -EINVAL;
-
- transaction = usb->transaction + submit_handle;
-
- /* Fail if this transaction already completed */
- if (unlikely((transaction->flags & __CVMX_USB_TRANSACTION_FLAGS_IN_USE) == 0))
- return -EINVAL;
-
- /* If the transaction is the HEAD of the queue and scheduled. We need to
- treat it special */
- if ((pipe->head == transaction) &&
- (pipe->flags & __CVMX_USB_PIPE_FLAGS_SCHEDULED)) {
- cvmx_usbcx_hccharx_t usbc_hcchar;
-
- usb->pipe_for_channel[pipe->channel] = NULL;
- pipe->flags &= ~__CVMX_USB_PIPE_FLAGS_SCHEDULED;
-
- CVMX_SYNCW;
-
- usbc_hcchar.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCCHARX(pipe->channel, usb->index));
- /* If the channel isn't enabled then the transaction already completed */
- if (usbc_hcchar.s.chena) {
- usbc_hcchar.s.chdis = 1;
- __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCCHARX(pipe->channel, usb->index), usbc_hcchar.u32);
- }
- }
- __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_CANCEL);
- return 0;
+ cvmx_usb_transaction_t *transaction;
+ cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t *)state;
+ cvmx_usb_pipe_t *pipe = usb->pipe + pipe_handle;
+
+ if (unlikely((pipe_handle < 0) || (pipe_handle >= MAX_PIPES)))
+ return -EINVAL;
+ if (unlikely((submit_handle < 0) || (submit_handle >= MAX_TRANSACTIONS)))
+ return -EINVAL;
+
+ /* Fail if the pipe isn't open */
+ if (unlikely((pipe->flags & __CVMX_USB_PIPE_FLAGS_OPEN) == 0))
+ return -EINVAL;
+
+ transaction = usb->transaction + submit_handle;
+
+ /* Fail if this transaction already completed */
+ if (unlikely((transaction->flags & __CVMX_USB_TRANSACTION_FLAGS_IN_USE) == 0))
+ return -EINVAL;
+
+ /* If the transaction is the HEAD of the queue and scheduled. We need to
+ treat it special */
+ if ((pipe->head == transaction) &&
+ (pipe->flags & __CVMX_USB_PIPE_FLAGS_SCHEDULED)) {
+ cvmx_usbcx_hccharx_t usbc_hcchar;
+
+ usb->pipe_for_channel[pipe->channel] = NULL;
+ pipe->flags &= ~__CVMX_USB_PIPE_FLAGS_SCHEDULED;
+
+ CVMX_SYNCW;
+
+ usbc_hcchar.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCCHARX(pipe->channel, usb->index));
+ /* If the channel isn't enabled then the transaction already completed */
+ if (usbc_hcchar.s.chena) {
+ usbc_hcchar.s.chdis = 1;
+ __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCCHARX(pipe->channel, usb->index), usbc_hcchar.u32);
+ }
+ }
+ __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_CANCEL);
+ return 0;
}
* does is call cvmx_usb_cancel() in a loop.
*
* @param state USB device state populated by
- * cvmx_usb_initialize().
+ * cvmx_usb_initialize().
* @param pipe_handle
- * Pipe handle to cancel requests in.
+ * Pipe handle to cancel requests in.
*
* @return 0 or a negative error code.
*/
int cvmx_usb_cancel_all(cvmx_usb_state_t *state, int pipe_handle)
{
- cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t*)state;
- cvmx_usb_pipe_t *pipe = usb->pipe + pipe_handle;
-
- if (unlikely((pipe_handle < 0) || (pipe_handle >= MAX_PIPES)))
- return -EINVAL;
-
- /* Fail if the pipe isn't open */
- if (unlikely((pipe->flags & __CVMX_USB_PIPE_FLAGS_OPEN) == 0))
- return -EINVAL;
-
- /* Simply loop through and attempt to cancel each transaction */
- while (pipe->head) {
- int result = cvmx_usb_cancel(state, pipe_handle,
- __cvmx_usb_get_submit_handle(usb, pipe->head));
- if (unlikely(result != 0))
- return result;
- }
- return 0;
+ cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t *)state;
+ cvmx_usb_pipe_t *pipe = usb->pipe + pipe_handle;
+
+ if (unlikely((pipe_handle < 0) || (pipe_handle >= MAX_PIPES)))
+ return -EINVAL;
+
+ /* Fail if the pipe isn't open */
+ if (unlikely((pipe->flags & __CVMX_USB_PIPE_FLAGS_OPEN) == 0))
+ return -EINVAL;
+
+ /* Simply loop through and attempt to cancel each transaction */
+ while (pipe->head) {
+ int result = cvmx_usb_cancel(state, pipe_handle,
+ __cvmx_usb_get_submit_handle(usb, pipe->head));
+ if (unlikely(result != 0))
+ return result;
+ }
+ return 0;
}
* Close a pipe created with cvmx_usb_open_pipe().
*
* @param state USB device state populated by
- * cvmx_usb_initialize().
+ * cvmx_usb_initialize().
* @param pipe_handle
- * Pipe handle to close.
+ * Pipe handle to close.
*
* @return 0 or a negative error code. EBUSY is returned if the pipe has
* outstanding transfers.
*/
int cvmx_usb_close_pipe(cvmx_usb_state_t *state, int pipe_handle)
{
- cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t*)state;
- cvmx_usb_pipe_t *pipe = usb->pipe + pipe_handle;
+ cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t *)state;
+ cvmx_usb_pipe_t *pipe = usb->pipe + pipe_handle;
- if (unlikely((pipe_handle < 0) || (pipe_handle >= MAX_PIPES)))
- return -EINVAL;
+ if (unlikely((pipe_handle < 0) || (pipe_handle >= MAX_PIPES)))
+ return -EINVAL;
- /* Fail if the pipe isn't open */
- if (unlikely((pipe->flags & __CVMX_USB_PIPE_FLAGS_OPEN) == 0))
- return -EINVAL;
+ /* Fail if the pipe isn't open */
+ if (unlikely((pipe->flags & __CVMX_USB_PIPE_FLAGS_OPEN) == 0))
+ return -EINVAL;
- /* Fail if the pipe has pending transactions */
- if (unlikely(pipe->head))
- return -EBUSY;
+ /* Fail if the pipe has pending transactions */
+ if (unlikely(pipe->head))
+ return -EBUSY;
- pipe->flags = 0;
- __cvmx_usb_remove_pipe(&usb->idle_pipes, pipe);
- __cvmx_usb_append_pipe(&usb->free_pipes, pipe);
+ pipe->flags = 0;
+ __cvmx_usb_remove_pipe(&usb->idle_pipes, pipe);
+ __cvmx_usb_append_pipe(&usb->free_pipes, pipe);
- return 0;
+ return 0;
}
/**
* Register a function to be called when various USB events occur.
*
- * @param state USB device state populated by
- * cvmx_usb_initialize().
+ * @param state USB device state populated by
+ * cvmx_usb_initialize().
* @param reason Which event to register for.
* @param callback Function to call when the event occurs.
* @param user_data User data parameter to the function.
cvmx_usb_callback_func_t callback,
void *user_data)
{
- cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t*)state;
+ cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t *)state;
- if (unlikely(reason >= __CVMX_USB_CALLBACK_END))
- return -EINVAL;
- if (unlikely(!callback))
- return -EINVAL;
+ if (unlikely(reason >= __CVMX_USB_CALLBACK_END))
+ return -EINVAL;
+ if (unlikely(!callback))
+ return -EINVAL;
- usb->callback[reason] = callback;
- usb->callback_data[reason] = user_data;
+ usb->callback[reason] = callback;
+ usb->callback_data[reason] = user_data;
- return 0;
+ return 0;
}
* number is always in the range of 0-0x7ff.
*
* @param state USB device state populated by
- * cvmx_usb_initialize().
+ * cvmx_usb_initialize().
*
* @return USB frame number
*/
int cvmx_usb_get_frame_number(cvmx_usb_state_t *state)
{
- int frame_number;
- cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t*)state;
- cvmx_usbcx_hfnum_t usbc_hfnum;
+ int frame_number;
+ cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t *)state;
+ cvmx_usbcx_hfnum_t usbc_hfnum;
- usbc_hfnum.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HFNUM(usb->index));
- frame_number = usbc_hfnum.s.frnum;
+ usbc_hfnum.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HFNUM(usb->index));
+ frame_number = usbc_hfnum.s.frnum;
- return frame_number;
+ return frame_number;
}
* @INTERNAL
* Poll a channel for status
*
- * @param usb USB device
+ * @param usb USB device
* @param channel Channel to poll
*
* @return Zero on success
*/
static int __cvmx_usb_poll_channel(cvmx_usb_internal_state_t *usb, int channel)
{
- cvmx_usbcx_hcintx_t usbc_hcint;
- cvmx_usbcx_hctsizx_t usbc_hctsiz;
- cvmx_usbcx_hccharx_t usbc_hcchar;
- cvmx_usb_pipe_t *pipe;
- cvmx_usb_transaction_t *transaction;
- int bytes_this_transfer;
- int bytes_in_last_packet;
- int packets_processed;
- int buffer_space_left;
-
- /* Read the interrupt status bits for the channel */
- usbc_hcint.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCINTX(channel, usb->index));
-
- if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) {
- usbc_hcchar.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCCHARX(channel, usb->index));
-
- if (usbc_hcchar.s.chena && usbc_hcchar.s.chdis) {
- /* There seems to be a bug in CN31XX which can cause interrupt
- IN transfers to get stuck until we do a write of HCCHARX
- without changing things */
- __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCCHARX(channel, usb->index), usbc_hcchar.u32);
- return 0;
- }
-
- /* In non DMA mode the channels don't halt themselves. We need to
- manually disable channels that are left running */
- if (!usbc_hcint.s.chhltd) {
- if (usbc_hcchar.s.chena) {
- cvmx_usbcx_hcintmskx_t hcintmsk;
- /* Disable all interrupts except CHHLTD */
- hcintmsk.u32 = 0;
- hcintmsk.s.chhltdmsk = 1;
- __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCINTMSKX(channel, usb->index), hcintmsk.u32);
- usbc_hcchar.s.chdis = 1;
- __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCCHARX(channel, usb->index), usbc_hcchar.u32);
- return 0;
- }
- else if (usbc_hcint.s.xfercompl) {
- /* Successful IN/OUT with transfer complete. Channel halt isn't needed */
- }
- else {
- cvmx_dprintf("USB%d: Channel %d interrupt without halt\n", usb->index, channel);
- return 0;
- }
- }
- }
- else {
- /* There is are no interrupts that we need to process when the channel is
- still running */
- if (!usbc_hcint.s.chhltd)
- return 0;
- }
-
- /* Disable the channel interrupts now that it is done */
- __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCINTMSKX(channel, usb->index), 0);
- usb->idle_hardware_channels |= (1<<channel);
-
- /* Make sure this channel is tied to a valid pipe */
- pipe = usb->pipe_for_channel[channel];
- CVMX_PREFETCH(pipe, 0);
- CVMX_PREFETCH(pipe, 128);
- if (!pipe)
- return 0;
- transaction = pipe->head;
- CVMX_PREFETCH0(transaction);
-
- /* Disconnect this pipe from the HW channel. Later the schedule function will
- figure out which pipe needs to go */
- usb->pipe_for_channel[channel] = NULL;
- pipe->flags &= ~__CVMX_USB_PIPE_FLAGS_SCHEDULED;
-
- /* Read the channel config info so we can figure out how much data
- transfered */
- usbc_hcchar.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCCHARX(channel, usb->index));
- usbc_hctsiz.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCTSIZX(channel, usb->index));
-
- /* Calculating the number of bytes successfully transferred is dependent on
- the transfer direction */
- packets_processed = transaction->pktcnt - usbc_hctsiz.s.pktcnt;
- if (usbc_hcchar.s.epdir) {
- /* IN transactions are easy. For every byte received the hardware
- decrements xfersize. All we need to do is subtract the current
- value of xfersize from its starting value and we know how many
- bytes were written to the buffer */
- bytes_this_transfer = transaction->xfersize - usbc_hctsiz.s.xfersize;
- }
- else {
- /* OUT transaction don't decrement xfersize. Instead pktcnt is
- decremented on every successful packet send. The hardware does
- this when it receives an ACK, or NYET. If it doesn't
- receive one of these responses pktcnt doesn't change */
- bytes_this_transfer = packets_processed * usbc_hcchar.s.mps;
- /* The last packet may not be a full transfer if we didn't have
- enough data */
- if (bytes_this_transfer > transaction->xfersize)
- bytes_this_transfer = transaction->xfersize;
- }
- /* Figure out how many bytes were in the last packet of the transfer */
- if (packets_processed)
- bytes_in_last_packet = bytes_this_transfer - (packets_processed-1) * usbc_hcchar.s.mps;
- else
- bytes_in_last_packet = bytes_this_transfer;
-
- /* As a special case, setup transactions output the setup header, not
- the user's data. For this reason we don't count setup data as bytes
- transferred */
- if ((transaction->stage == CVMX_USB_STAGE_SETUP) ||
- (transaction->stage == CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE))
- bytes_this_transfer = 0;
-
- /* Add the bytes transferred to the running total. It is important that
- bytes_this_transfer doesn't count any data that needs to be
- retransmitted */
- transaction->actual_bytes += bytes_this_transfer;
- if (transaction->type == CVMX_USB_TRANSFER_ISOCHRONOUS)
- buffer_space_left = transaction->iso_packets[0].length - transaction->actual_bytes;
- else
- buffer_space_left = transaction->buffer_length - transaction->actual_bytes;
-
- /* We need to remember the PID toggle state for the next transaction. The
- hardware already updated it for the next transaction */
- pipe->pid_toggle = !(usbc_hctsiz.s.pid == 0);
-
- /* For high speed bulk out, assume the next transaction will need to do a
- ping before proceeding. If this isn't true the ACK processing below
- will clear this flag */
- if ((pipe->device_speed == CVMX_USB_SPEED_HIGH) &&
- (pipe->transfer_type == CVMX_USB_TRANSFER_BULK) &&
- (pipe->transfer_dir == CVMX_USB_DIRECTION_OUT))
- pipe->flags |= __CVMX_USB_PIPE_FLAGS_NEED_PING;
-
- if (usbc_hcint.s.stall) {
- /* STALL as a response means this transaction cannot be completed
- because the device can't process transactions. Tell the user. Any
- data that was transferred will be counted on the actual bytes
- transferred */
- pipe->pid_toggle = 0;
- __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_STALL);
- }
- else if (usbc_hcint.s.xacterr) {
- /* We know at least one packet worked if we get a ACK or NAK. Reset the retry counter */
- if (usbc_hcint.s.nak || usbc_hcint.s.ack)
- transaction->retries = 0;
- transaction->retries++;
- if (transaction->retries > MAX_RETRIES) {
- /* XactErr as a response means the device signaled something wrong with
- the transfer. For example, PID toggle errors cause these */
- __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_XACTERR);
- }
- else {
- /* If this was a split then clear our split in progress marker */
- if (usb->active_split == transaction)
- usb->active_split = NULL;
- /* Rewind to the beginning of the transaction by anding off the
- split complete bit */
- transaction->stage &= ~1;
- pipe->split_sc_frame = -1;
- pipe->next_tx_frame += pipe->interval;
- if (pipe->next_tx_frame < usb->frame_number)
- pipe->next_tx_frame = usb->frame_number + pipe->interval -
- (usb->frame_number - pipe->next_tx_frame) % pipe->interval;
- }
- }
- else if (usbc_hcint.s.bblerr)
- {
- /* Babble Error (BblErr) */
- __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_BABBLEERR);
- }
- else if (usbc_hcint.s.datatglerr)
- {
- /* We'll retry the exact same transaction again */
- transaction->retries++;
- }
- else if (usbc_hcint.s.nyet) {
- /* NYET as a response is only allowed in three cases: as a response to
- a ping, as a response to a split transaction, and as a response to
- a bulk out. The ping case is handled by hardware, so we only have
- splits and bulk out */
- if (!__cvmx_usb_pipe_needs_split(usb, pipe)) {
- transaction->retries = 0;
- /* If there is more data to go then we need to try again. Otherwise
- this transaction is complete */
- if ((buffer_space_left == 0) || (bytes_in_last_packet < pipe->max_packet))
- __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS);
- }
- else {
- /* Split transactions retry the split complete 4 times then rewind
- to the start split and do the entire transactions again */
- transaction->retries++;
- if ((transaction->retries & 0x3) == 0) {
- /* Rewind to the beginning of the transaction by anding off the
- split complete bit */
- transaction->stage &= ~1;
- pipe->split_sc_frame = -1;
- }
- }
- }
- else if (usbc_hcint.s.ack) {
- transaction->retries = 0;
- /* The ACK bit can only be checked after the other error bits. This is
- because a multi packet transfer may succeed in a number of packets
- and then get a different response on the last packet. In this case
- both ACK and the last response bit will be set. If none of the
- other response bits is set, then the last packet must have been an
- ACK */
-
- /* Since we got an ACK, we know we don't need to do a ping on this
- pipe */
- pipe->flags &= ~__CVMX_USB_PIPE_FLAGS_NEED_PING;
-
- switch (transaction->type)
- {
- case CVMX_USB_TRANSFER_CONTROL:
- switch (transaction->stage)
- {
- case CVMX_USB_STAGE_NON_CONTROL:
- case CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE:
- /* This should be impossible */
- __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_ERROR);
- break;
- case CVMX_USB_STAGE_SETUP:
- pipe->pid_toggle = 1;
- if (__cvmx_usb_pipe_needs_split(usb, pipe))
- transaction->stage = CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE;
- else {
- cvmx_usb_control_header_t *header = cvmx_phys_to_ptr(transaction->control_header);
- if (header->s.length)
- transaction->stage = CVMX_USB_STAGE_DATA;
- else
- transaction->stage = CVMX_USB_STAGE_STATUS;
- }
- break;
- case CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE:
- {
- cvmx_usb_control_header_t *header = cvmx_phys_to_ptr(transaction->control_header);
- if (header->s.length)
- transaction->stage = CVMX_USB_STAGE_DATA;
- else
- transaction->stage = CVMX_USB_STAGE_STATUS;
- }
- break;
- case CVMX_USB_STAGE_DATA:
- if (__cvmx_usb_pipe_needs_split(usb, pipe)) {
- transaction->stage = CVMX_USB_STAGE_DATA_SPLIT_COMPLETE;
- /* For setup OUT data that are splits, the hardware
- doesn't appear to count transferred data. Here
- we manually update the data transferred */
- if (!usbc_hcchar.s.epdir) {
- if (buffer_space_left < pipe->max_packet)
- transaction->actual_bytes += buffer_space_left;
- else
- transaction->actual_bytes += pipe->max_packet;
- }
- }
- else if ((buffer_space_left == 0) || (bytes_in_last_packet < pipe->max_packet)) {
- pipe->pid_toggle = 1;
- transaction->stage = CVMX_USB_STAGE_STATUS;
- }
- break;
- case CVMX_USB_STAGE_DATA_SPLIT_COMPLETE:
- if ((buffer_space_left == 0) || (bytes_in_last_packet < pipe->max_packet)) {
- pipe->pid_toggle = 1;
- transaction->stage = CVMX_USB_STAGE_STATUS;
- }
- else {
- transaction->stage = CVMX_USB_STAGE_DATA;
- }
- break;
- case CVMX_USB_STAGE_STATUS:
- if (__cvmx_usb_pipe_needs_split(usb, pipe))
- transaction->stage = CVMX_USB_STAGE_STATUS_SPLIT_COMPLETE;
- else
- __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS);
- break;
- case CVMX_USB_STAGE_STATUS_SPLIT_COMPLETE:
- __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS);
- break;
- }
- break;
- case CVMX_USB_TRANSFER_BULK:
- case CVMX_USB_TRANSFER_INTERRUPT:
- /* The only time a bulk transfer isn't complete when
- it finishes with an ACK is during a split transaction. For
- splits we need to continue the transfer if more data is
- needed */
- if (__cvmx_usb_pipe_needs_split(usb, pipe)) {
- if (transaction->stage == CVMX_USB_STAGE_NON_CONTROL)
- transaction->stage = CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE;
- else {
- if (buffer_space_left && (bytes_in_last_packet == pipe->max_packet))
- transaction->stage = CVMX_USB_STAGE_NON_CONTROL;
- else {
- if (transaction->type == CVMX_USB_TRANSFER_INTERRUPT)
- pipe->next_tx_frame += pipe->interval;
- __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS);
- }
- }
- }
- else {
- if ((pipe->device_speed == CVMX_USB_SPEED_HIGH) &&
- (pipe->transfer_type == CVMX_USB_TRANSFER_BULK) &&
- (pipe->transfer_dir == CVMX_USB_DIRECTION_OUT) &&
- (usbc_hcint.s.nak))
- pipe->flags |= __CVMX_USB_PIPE_FLAGS_NEED_PING;
- if (!buffer_space_left || (bytes_in_last_packet < pipe->max_packet)) {
- if (transaction->type == CVMX_USB_TRANSFER_INTERRUPT)
- pipe->next_tx_frame += pipe->interval;
- __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS);
- }
- }
- break;
- case CVMX_USB_TRANSFER_ISOCHRONOUS:
- if (__cvmx_usb_pipe_needs_split(usb, pipe)) {
- /* ISOCHRONOUS OUT splits don't require a complete split stage.
- Instead they use a sequence of begin OUT splits to transfer
- the data 188 bytes at a time. Once the transfer is complete,
- the pipe sleeps until the next schedule interval */
- if (pipe->transfer_dir == CVMX_USB_DIRECTION_OUT) {
- /* If no space left or this wasn't a max size packet then
- this transfer is complete. Otherwise start it again
- to send the next 188 bytes */
- if (!buffer_space_left || (bytes_this_transfer < 188)) {
- pipe->next_tx_frame += pipe->interval;
- __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS);
- }
- }
- else {
- if (transaction->stage == CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE) {
- /* We are in the incoming data phase. Keep getting
- data until we run out of space or get a small
- packet */
- if ((buffer_space_left == 0) || (bytes_in_last_packet < pipe->max_packet)) {
- pipe->next_tx_frame += pipe->interval;
- __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS);
- }
- }
- else
- transaction->stage = CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE;
- }
- }
- else {
- pipe->next_tx_frame += pipe->interval;
- __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS);
- }
- break;
- }
- }
- else if (usbc_hcint.s.nak) {
- /* If this was a split then clear our split in progress marker */
- if (usb->active_split == transaction)
- usb->active_split = NULL;
- /* NAK as a response means the device couldn't accept the transaction,
- but it should be retried in the future. Rewind to the beginning of
- the transaction by anding off the split complete bit. Retry in the
- next interval */
- transaction->retries = 0;
- transaction->stage &= ~1;
- pipe->next_tx_frame += pipe->interval;
- if (pipe->next_tx_frame < usb->frame_number)
- pipe->next_tx_frame = usb->frame_number + pipe->interval -
- (usb->frame_number - pipe->next_tx_frame) % pipe->interval;
- }
- else {
- cvmx_usb_port_status_t port;
- port = cvmx_usb_get_status((cvmx_usb_state_t *)usb);
- if (port.port_enabled)
- {
- /* We'll retry the exact same transaction again */
- transaction->retries++;
- }
- else
- {
- /* We get channel halted interrupts with no result bits sets when the
- cable is unplugged */
- __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_ERROR);
- }
- }
- return 0;
+ cvmx_usbcx_hcintx_t usbc_hcint;
+ cvmx_usbcx_hctsizx_t usbc_hctsiz;
+ cvmx_usbcx_hccharx_t usbc_hcchar;
+ cvmx_usb_pipe_t *pipe;
+ cvmx_usb_transaction_t *transaction;
+ int bytes_this_transfer;
+ int bytes_in_last_packet;
+ int packets_processed;
+ int buffer_space_left;
+
+ /* Read the interrupt status bits for the channel */
+ usbc_hcint.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCINTX(channel, usb->index));
+
+ if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA) {
+ usbc_hcchar.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCCHARX(channel, usb->index));
+
+ if (usbc_hcchar.s.chena && usbc_hcchar.s.chdis) {
+ /* There seems to be a bug in CN31XX which can cause interrupt
+ IN transfers to get stuck until we do a write of HCCHARX
+ without changing things */
+ __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCCHARX(channel, usb->index), usbc_hcchar.u32);
+ return 0;
+ }
+
+ /* In non DMA mode the channels don't halt themselves. We need to
+ manually disable channels that are left running */
+ if (!usbc_hcint.s.chhltd) {
+ if (usbc_hcchar.s.chena) {
+ cvmx_usbcx_hcintmskx_t hcintmsk;
+ /* Disable all interrupts except CHHLTD */
+ hcintmsk.u32 = 0;
+ hcintmsk.s.chhltdmsk = 1;
+ __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCINTMSKX(channel, usb->index), hcintmsk.u32);
+ usbc_hcchar.s.chdis = 1;
+ __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCCHARX(channel, usb->index), usbc_hcchar.u32);
+ return 0;
+ } else if (usbc_hcint.s.xfercompl) {
+ /* Successful IN/OUT with transfer complete. Channel halt isn't needed */
+ } else {
+ cvmx_dprintf("USB%d: Channel %d interrupt without halt\n", usb->index, channel);
+ return 0;
+ }
+ }
+ } else {
+ /* There is are no interrupts that we need to process when the channel is
+ still running */
+ if (!usbc_hcint.s.chhltd)
+ return 0;
+ }
+
+ /* Disable the channel interrupts now that it is done */
+ __cvmx_usb_write_csr32(usb, CVMX_USBCX_HCINTMSKX(channel, usb->index), 0);
+ usb->idle_hardware_channels |= (1<<channel);
+
+ /* Make sure this channel is tied to a valid pipe */
+ pipe = usb->pipe_for_channel[channel];
+ CVMX_PREFETCH(pipe, 0);
+ CVMX_PREFETCH(pipe, 128);
+ if (!pipe)
+ return 0;
+ transaction = pipe->head;
+ CVMX_PREFETCH0(transaction);
+
+ /* Disconnect this pipe from the HW channel. Later the schedule function will
+ figure out which pipe needs to go */
+ usb->pipe_for_channel[channel] = NULL;
+ pipe->flags &= ~__CVMX_USB_PIPE_FLAGS_SCHEDULED;
+
+ /* Read the channel config info so we can figure out how much data
+ transfered */
+ usbc_hcchar.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCCHARX(channel, usb->index));
+ usbc_hctsiz.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HCTSIZX(channel, usb->index));
+
+ /* Calculating the number of bytes successfully transferred is dependent on
+ the transfer direction */
+ packets_processed = transaction->pktcnt - usbc_hctsiz.s.pktcnt;
+ if (usbc_hcchar.s.epdir) {
+ /* IN transactions are easy. For every byte received the hardware
+ decrements xfersize. All we need to do is subtract the current
+ value of xfersize from its starting value and we know how many
+ bytes were written to the buffer */
+ bytes_this_transfer = transaction->xfersize - usbc_hctsiz.s.xfersize;
+ } else {
+ /* OUT transaction don't decrement xfersize. Instead pktcnt is
+ decremented on every successful packet send. The hardware does
+ this when it receives an ACK, or NYET. If it doesn't
+ receive one of these responses pktcnt doesn't change */
+ bytes_this_transfer = packets_processed * usbc_hcchar.s.mps;
+ /* The last packet may not be a full transfer if we didn't have
+ enough data */
+ if (bytes_this_transfer > transaction->xfersize)
+ bytes_this_transfer = transaction->xfersize;
+ }
+ /* Figure out how many bytes were in the last packet of the transfer */
+ if (packets_processed)
+ bytes_in_last_packet = bytes_this_transfer - (packets_processed-1) * usbc_hcchar.s.mps;
+ else
+ bytes_in_last_packet = bytes_this_transfer;
+
+ /* As a special case, setup transactions output the setup header, not
+ the user's data. For this reason we don't count setup data as bytes
+ transferred */
+ if ((transaction->stage == CVMX_USB_STAGE_SETUP) ||
+ (transaction->stage == CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE))
+ bytes_this_transfer = 0;
+
+ /* Add the bytes transferred to the running total. It is important that
+ bytes_this_transfer doesn't count any data that needs to be
+ retransmitted */
+ transaction->actual_bytes += bytes_this_transfer;
+ if (transaction->type == CVMX_USB_TRANSFER_ISOCHRONOUS)
+ buffer_space_left = transaction->iso_packets[0].length - transaction->actual_bytes;
+ else
+ buffer_space_left = transaction->buffer_length - transaction->actual_bytes;
+
+ /* We need to remember the PID toggle state for the next transaction. The
+ hardware already updated it for the next transaction */
+ pipe->pid_toggle = !(usbc_hctsiz.s.pid == 0);
+
+ /* For high speed bulk out, assume the next transaction will need to do a
+ ping before proceeding. If this isn't true the ACK processing below
+ will clear this flag */
+ if ((pipe->device_speed == CVMX_USB_SPEED_HIGH) &&
+ (pipe->transfer_type == CVMX_USB_TRANSFER_BULK) &&
+ (pipe->transfer_dir == CVMX_USB_DIRECTION_OUT))
+ pipe->flags |= __CVMX_USB_PIPE_FLAGS_NEED_PING;
+
+ if (usbc_hcint.s.stall) {
+ /* STALL as a response means this transaction cannot be completed
+ because the device can't process transactions. Tell the user. Any
+ data that was transferred will be counted on the actual bytes
+ transferred */
+ pipe->pid_toggle = 0;
+ __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_STALL);
+ } else if (usbc_hcint.s.xacterr) {
+ /* We know at least one packet worked if we get a ACK or NAK. Reset the retry counter */
+ if (usbc_hcint.s.nak || usbc_hcint.s.ack)
+ transaction->retries = 0;
+ transaction->retries++;
+ if (transaction->retries > MAX_RETRIES) {
+ /* XactErr as a response means the device signaled something wrong with
+ the transfer. For example, PID toggle errors cause these */
+ __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_XACTERR);
+ } else {
+ /* If this was a split then clear our split in progress marker */
+ if (usb->active_split == transaction)
+ usb->active_split = NULL;
+ /* Rewind to the beginning of the transaction by anding off the
+ split complete bit */
+ transaction->stage &= ~1;
+ pipe->split_sc_frame = -1;
+ pipe->next_tx_frame += pipe->interval;
+ if (pipe->next_tx_frame < usb->frame_number)
+ pipe->next_tx_frame = usb->frame_number + pipe->interval -
+ (usb->frame_number - pipe->next_tx_frame) % pipe->interval;
+ }
+ } else if (usbc_hcint.s.bblerr) {
+ /* Babble Error (BblErr) */
+ __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_BABBLEERR);
+ } else if (usbc_hcint.s.datatglerr) {
+ /* We'll retry the exact same transaction again */
+ transaction->retries++;
+ } else if (usbc_hcint.s.nyet) {
+ /* NYET as a response is only allowed in three cases: as a response to
+ a ping, as a response to a split transaction, and as a response to
+ a bulk out. The ping case is handled by hardware, so we only have
+ splits and bulk out */
+ if (!__cvmx_usb_pipe_needs_split(usb, pipe)) {
+ transaction->retries = 0;
+ /* If there is more data to go then we need to try again. Otherwise
+ this transaction is complete */
+ if ((buffer_space_left == 0) || (bytes_in_last_packet < pipe->max_packet))
+ __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS);
+ } else {
+ /* Split transactions retry the split complete 4 times then rewind
+ to the start split and do the entire transactions again */
+ transaction->retries++;
+ if ((transaction->retries & 0x3) == 0) {
+ /* Rewind to the beginning of the transaction by anding off the
+ split complete bit */
+ transaction->stage &= ~1;
+ pipe->split_sc_frame = -1;
+ }
+ }
+ } else if (usbc_hcint.s.ack) {
+ transaction->retries = 0;
+ /* The ACK bit can only be checked after the other error bits. This is
+ because a multi packet transfer may succeed in a number of packets
+ and then get a different response on the last packet. In this case
+ both ACK and the last response bit will be set. If none of the
+ other response bits is set, then the last packet must have been an
+ ACK */
+
+ /* Since we got an ACK, we know we don't need to do a ping on this
+ pipe */
+ pipe->flags &= ~__CVMX_USB_PIPE_FLAGS_NEED_PING;
+
+ switch (transaction->type) {
+ case CVMX_USB_TRANSFER_CONTROL:
+ switch (transaction->stage) {
+ case CVMX_USB_STAGE_NON_CONTROL:
+ case CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE:
+ /* This should be impossible */
+ __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_ERROR);
+ break;
+ case CVMX_USB_STAGE_SETUP:
+ pipe->pid_toggle = 1;
+ if (__cvmx_usb_pipe_needs_split(usb, pipe))
+ transaction->stage = CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE;
+ else {
+ cvmx_usb_control_header_t *header = cvmx_phys_to_ptr(transaction->control_header);
+ if (header->s.length)
+ transaction->stage = CVMX_USB_STAGE_DATA;
+ else
+ transaction->stage = CVMX_USB_STAGE_STATUS;
+ }
+ break;
+ case CVMX_USB_STAGE_SETUP_SPLIT_COMPLETE:
+ {
+ cvmx_usb_control_header_t *header = cvmx_phys_to_ptr(transaction->control_header);
+ if (header->s.length)
+ transaction->stage = CVMX_USB_STAGE_DATA;
+ else
+ transaction->stage = CVMX_USB_STAGE_STATUS;
+ }
+ break;
+ case CVMX_USB_STAGE_DATA:
+ if (__cvmx_usb_pipe_needs_split(usb, pipe)) {
+ transaction->stage = CVMX_USB_STAGE_DATA_SPLIT_COMPLETE;
+ /* For setup OUT data that are splits, the hardware
+ doesn't appear to count transferred data. Here
+ we manually update the data transferred */
+ if (!usbc_hcchar.s.epdir) {
+ if (buffer_space_left < pipe->max_packet)
+ transaction->actual_bytes += buffer_space_left;
+ else
+ transaction->actual_bytes += pipe->max_packet;
+ }
+ } else if ((buffer_space_left == 0) || (bytes_in_last_packet < pipe->max_packet)) {
+ pipe->pid_toggle = 1;
+ transaction->stage = CVMX_USB_STAGE_STATUS;
+ }
+ break;
+ case CVMX_USB_STAGE_DATA_SPLIT_COMPLETE:
+ if ((buffer_space_left == 0) || (bytes_in_last_packet < pipe->max_packet)) {
+ pipe->pid_toggle = 1;
+ transaction->stage = CVMX_USB_STAGE_STATUS;
+ } else {
+ transaction->stage = CVMX_USB_STAGE_DATA;
+ }
+ break;
+ case CVMX_USB_STAGE_STATUS:
+ if (__cvmx_usb_pipe_needs_split(usb, pipe))
+ transaction->stage = CVMX_USB_STAGE_STATUS_SPLIT_COMPLETE;
+ else
+ __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS);
+ break;
+ case CVMX_USB_STAGE_STATUS_SPLIT_COMPLETE:
+ __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS);
+ break;
+ }
+ break;
+ case CVMX_USB_TRANSFER_BULK:
+ case CVMX_USB_TRANSFER_INTERRUPT:
+ /* The only time a bulk transfer isn't complete when
+ it finishes with an ACK is during a split transaction. For
+ splits we need to continue the transfer if more data is
+ needed */
+ if (__cvmx_usb_pipe_needs_split(usb, pipe)) {
+ if (transaction->stage == CVMX_USB_STAGE_NON_CONTROL)
+ transaction->stage = CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE;
+ else {
+ if (buffer_space_left && (bytes_in_last_packet == pipe->max_packet))
+ transaction->stage = CVMX_USB_STAGE_NON_CONTROL;
+ else {
+ if (transaction->type == CVMX_USB_TRANSFER_INTERRUPT)
+ pipe->next_tx_frame += pipe->interval;
+ __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS);
+ }
+ }
+ } else {
+ if ((pipe->device_speed == CVMX_USB_SPEED_HIGH) &&
+ (pipe->transfer_type == CVMX_USB_TRANSFER_BULK) &&
+ (pipe->transfer_dir == CVMX_USB_DIRECTION_OUT) &&
+ (usbc_hcint.s.nak))
+ pipe->flags |= __CVMX_USB_PIPE_FLAGS_NEED_PING;
+ if (!buffer_space_left || (bytes_in_last_packet < pipe->max_packet)) {
+ if (transaction->type == CVMX_USB_TRANSFER_INTERRUPT)
+ pipe->next_tx_frame += pipe->interval;
+ __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS);
+ }
+ }
+ break;
+ case CVMX_USB_TRANSFER_ISOCHRONOUS:
+ if (__cvmx_usb_pipe_needs_split(usb, pipe)) {
+ /* ISOCHRONOUS OUT splits don't require a complete split stage.
+ Instead they use a sequence of begin OUT splits to transfer
+ the data 188 bytes at a time. Once the transfer is complete,
+ the pipe sleeps until the next schedule interval */
+ if (pipe->transfer_dir == CVMX_USB_DIRECTION_OUT) {
+ /* If no space left or this wasn't a max size packet then
+ this transfer is complete. Otherwise start it again
+ to send the next 188 bytes */
+ if (!buffer_space_left || (bytes_this_transfer < 188)) {
+ pipe->next_tx_frame += pipe->interval;
+ __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS);
+ }
+ } else {
+ if (transaction->stage == CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE) {
+ /* We are in the incoming data phase. Keep getting
+ data until we run out of space or get a small
+ packet */
+ if ((buffer_space_left == 0) || (bytes_in_last_packet < pipe->max_packet)) {
+ pipe->next_tx_frame += pipe->interval;
+ __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS);
+ }
+ } else
+ transaction->stage = CVMX_USB_STAGE_NON_CONTROL_SPLIT_COMPLETE;
+ }
+ } else {
+ pipe->next_tx_frame += pipe->interval;
+ __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_SUCCESS);
+ }
+ break;
+ }
+ } else if (usbc_hcint.s.nak) {
+ /* If this was a split then clear our split in progress marker */
+ if (usb->active_split == transaction)
+ usb->active_split = NULL;
+ /* NAK as a response means the device couldn't accept the transaction,
+ but it should be retried in the future. Rewind to the beginning of
+ the transaction by anding off the split complete bit. Retry in the
+ next interval */
+ transaction->retries = 0;
+ transaction->stage &= ~1;
+ pipe->next_tx_frame += pipe->interval;
+ if (pipe->next_tx_frame < usb->frame_number)
+ pipe->next_tx_frame = usb->frame_number + pipe->interval -
+ (usb->frame_number - pipe->next_tx_frame) % pipe->interval;
+ } else {
+ cvmx_usb_port_status_t port;
+ port = cvmx_usb_get_status((cvmx_usb_state_t *)usb);
+ if (port.port_enabled) {
+ /* We'll retry the exact same transaction again */
+ transaction->retries++;
+ } else {
+ /* We get channel halted interrupts with no result bits sets when the
+ cable is unplugged */
+ __cvmx_usb_perform_complete(usb, pipe, transaction, CVMX_USB_COMPLETE_ERROR);
+ }
+ }
+ return 0;
}
* handler for the USB controller. It can also be called
* periodically in a loop for non-interrupt based operation.
*
- * @param state USB device state populated by
- * cvmx_usb_initialize().
+ * @param state USB device state populated by
+ * cvmx_usb_initialize().
*
* @return 0 or a negative error code.
*/
int cvmx_usb_poll(cvmx_usb_state_t *state)
{
- cvmx_usbcx_hfnum_t usbc_hfnum;
- cvmx_usbcx_gintsts_t usbc_gintsts;
- cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t*)state;
-
- CVMX_PREFETCH(usb, 0);
- CVMX_PREFETCH(usb, 1*128);
- CVMX_PREFETCH(usb, 2*128);
- CVMX_PREFETCH(usb, 3*128);
- CVMX_PREFETCH(usb, 4*128);
-
- /* Update the frame counter */
- usbc_hfnum.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HFNUM(usb->index));
- if ((usb->frame_number&0x3fff) > usbc_hfnum.s.frnum)
- usb->frame_number += 0x4000;
- usb->frame_number &= ~0x3fffull;
- usb->frame_number |= usbc_hfnum.s.frnum;
-
- /* Read the pending interrupts */
- usbc_gintsts.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GINTSTS(usb->index));
-
- /* Clear the interrupts now that we know about them */
- __cvmx_usb_write_csr32(usb, CVMX_USBCX_GINTSTS(usb->index), usbc_gintsts.u32);
-
- if (usbc_gintsts.s.rxflvl) {
- /* RxFIFO Non-Empty (RxFLvl)
- Indicates that there is at least one packet pending to be read
- from the RxFIFO. */
- /* In DMA mode this is handled by hardware */
- if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA)
- __cvmx_usb_poll_rx_fifo(usb);
- }
- if (usbc_gintsts.s.ptxfemp || usbc_gintsts.s.nptxfemp) {
- /* Fill the Tx FIFOs when not in DMA mode */
- if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA)
- __cvmx_usb_poll_tx_fifo(usb);
- }
- if (usbc_gintsts.s.disconnint || usbc_gintsts.s.prtint) {
- cvmx_usbcx_hprt_t usbc_hprt;
- /* Disconnect Detected Interrupt (DisconnInt)
- Asserted when a device disconnect is detected. */
-
- /* Host Port Interrupt (PrtInt)
- The core sets this bit to indicate a change in port status of one
- of the O2P USB core ports in Host mode. The application must
- read the Host Port Control and Status (HPRT) register to
- determine the exact event that caused this interrupt. The
- application must clear the appropriate status bit in the Host Port
- Control and Status register to clear this bit. */
-
- /* Call the user's port callback */
- __cvmx_usb_perform_callback(usb, NULL, NULL,
- CVMX_USB_CALLBACK_PORT_CHANGED,
- CVMX_USB_COMPLETE_SUCCESS);
- /* Clear the port change bits */
- usbc_hprt.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HPRT(usb->index));
- usbc_hprt.s.prtena = 0;
- __cvmx_usb_write_csr32(usb, CVMX_USBCX_HPRT(usb->index), usbc_hprt.u32);
- }
- if (usbc_gintsts.s.hchint) {
- /* Host Channels Interrupt (HChInt)
- The core sets this bit to indicate that an interrupt is pending on
- one of the channels of the core (in Host mode). The application
- must read the Host All Channels Interrupt (HAINT) register to
- determine the exact number of the channel on which the
- interrupt occurred, and then read the corresponding Host
- Channel-n Interrupt (HCINTn) register to determine the exact
- cause of the interrupt. The application must clear the
- appropriate status bit in the HCINTn register to clear this bit. */
- cvmx_usbcx_haint_t usbc_haint;
- usbc_haint.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HAINT(usb->index));
- while (usbc_haint.u32) {
- int channel;
- CVMX_CLZ(channel, usbc_haint.u32);
- channel = 31 - channel;
- __cvmx_usb_poll_channel(usb, channel);
- usbc_haint.u32 ^= 1<<channel;
- }
- }
-
- __cvmx_usb_schedule(usb, usbc_gintsts.s.sof);
-
- return 0;
+ cvmx_usbcx_hfnum_t usbc_hfnum;
+ cvmx_usbcx_gintsts_t usbc_gintsts;
+ cvmx_usb_internal_state_t *usb = (cvmx_usb_internal_state_t *)state;
+
+ CVMX_PREFETCH(usb, 0);
+ CVMX_PREFETCH(usb, 1*128);
+ CVMX_PREFETCH(usb, 2*128);
+ CVMX_PREFETCH(usb, 3*128);
+ CVMX_PREFETCH(usb, 4*128);
+
+ /* Update the frame counter */
+ usbc_hfnum.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HFNUM(usb->index));
+ if ((usb->frame_number&0x3fff) > usbc_hfnum.s.frnum)
+ usb->frame_number += 0x4000;
+ usb->frame_number &= ~0x3fffull;
+ usb->frame_number |= usbc_hfnum.s.frnum;
+
+ /* Read the pending interrupts */
+ usbc_gintsts.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_GINTSTS(usb->index));
+
+ /* Clear the interrupts now that we know about them */
+ __cvmx_usb_write_csr32(usb, CVMX_USBCX_GINTSTS(usb->index), usbc_gintsts.u32);
+
+ if (usbc_gintsts.s.rxflvl) {
+ /* RxFIFO Non-Empty (RxFLvl)
+ Indicates that there is at least one packet pending to be read
+ from the RxFIFO. */
+ /* In DMA mode this is handled by hardware */
+ if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA)
+ __cvmx_usb_poll_rx_fifo(usb);
+ }
+ if (usbc_gintsts.s.ptxfemp || usbc_gintsts.s.nptxfemp) {
+ /* Fill the Tx FIFOs when not in DMA mode */
+ if (usb->init_flags & CVMX_USB_INITIALIZE_FLAGS_NO_DMA)
+ __cvmx_usb_poll_tx_fifo(usb);
+ }
+ if (usbc_gintsts.s.disconnint || usbc_gintsts.s.prtint) {
+ cvmx_usbcx_hprt_t usbc_hprt;
+ /* Disconnect Detected Interrupt (DisconnInt)
+ Asserted when a device disconnect is detected. */
+
+ /* Host Port Interrupt (PrtInt)
+ The core sets this bit to indicate a change in port status of one
+ of the O2P USB core ports in Host mode. The application must
+ read the Host Port Control and Status (HPRT) register to
+ determine the exact event that caused this interrupt. The
+ application must clear the appropriate status bit in the Host Port
+ Control and Status register to clear this bit. */
+
+ /* Call the user's port callback */
+ __cvmx_usb_perform_callback(usb, NULL, NULL,
+ CVMX_USB_CALLBACK_PORT_CHANGED,
+ CVMX_USB_COMPLETE_SUCCESS);
+ /* Clear the port change bits */
+ usbc_hprt.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HPRT(usb->index));
+ usbc_hprt.s.prtena = 0;
+ __cvmx_usb_write_csr32(usb, CVMX_USBCX_HPRT(usb->index), usbc_hprt.u32);
+ }
+ if (usbc_gintsts.s.hchint) {
+ /* Host Channels Interrupt (HChInt)
+ The core sets this bit to indicate that an interrupt is pending on
+ one of the channels of the core (in Host mode). The application
+ must read the Host All Channels Interrupt (HAINT) register to
+ determine the exact number of the channel on which the
+ interrupt occurred, and then read the corresponding Host
+ Channel-n Interrupt (HCINTn) register to determine the exact
+ cause of the interrupt. The application must clear the
+ appropriate status bit in the HCINTn register to clear this bit. */
+ cvmx_usbcx_haint_t usbc_haint;
+ usbc_haint.u32 = __cvmx_usb_read_csr32(usb, CVMX_USBCX_HAINT(usb->index));
+ while (usbc_haint.u32) {
+ int channel;
+ CVMX_CLZ(channel, usbc_haint.u32);
+ channel = 31 - channel;
+ __cvmx_usb_poll_channel(usb, channel);
+ usbc_haint.u32 ^= 1<<channel;
+ }
+ }
+
+ __cvmx_usb_schedule(usb, usbc_gintsts.s.sof);
+
+ return 0;
}
projects / platform / kernel / linux-rpi.git / commitdiff