3 * Denis Peter, MPL AG Switzerland
5 * Adapted for U-Boot driver model
6 * (C) Copyright 2015 Google, Inc
8 * SPDX-License-Identifier: GPL-2.0+
9 * Note: Part of this code has been derived from linux
17 #include <linux/usb/ch9.h>
18 #include <asm/cache.h>
22 * The EHCI spec says that we must align to at least 32 bytes. However,
23 * some platforms require larger alignment.
25 #if ARCH_DMA_MINALIGN > 32
26 #define USB_DMA_MINALIGN ARCH_DMA_MINALIGN
28 #define USB_DMA_MINALIGN 32
31 /* Everything is aribtrary */
32 #define USB_ALTSETTINGALLOC 4
33 #define USB_MAXALTSETTING 128 /* Hard limit */
35 #define USB_MAX_DEVICE 32
36 #define USB_MAXCONFIG 8
37 #define USB_MAXINTERFACES 8
38 #define USB_MAXENDPOINTS 16
39 #define USB_MAXCHILDREN 8 /* This is arbitrary */
40 #define USB_MAX_HUB 16
42 #define USB_CNTL_TIMEOUT 100 /* 100ms timeout */
45 * This is the timeout to allow for submitting an urb in ms. We allow more
46 * time for a BULK device to react - some are slow.
48 #define USB_TIMEOUT_MS(pipe) (usb_pipebulk(pipe) ? 5000 : 1000)
50 /* device request (setup) */
57 } __attribute__ ((packed));
60 struct usb_interface {
61 struct usb_interface_descriptor desc;
67 struct usb_endpoint_descriptor ep_desc[USB_MAXENDPOINTS];
69 * Super Speed Device will have Super Speed Endpoint
70 * Companion Descriptor (section 9.6.7 of usb 3.0 spec)
71 * Revision 1.0 June 6th 2011
73 struct usb_ss_ep_comp_descriptor ss_ep_comp_desc[USB_MAXENDPOINTS];
74 } __attribute__ ((packed));
76 /* Configuration information.. */
78 struct usb_config_descriptor desc;
80 __u8 no_of_if; /* number of interfaces */
81 struct usb_interface if_desc[USB_MAXINTERFACES];
82 } __attribute__ ((packed));
85 /* Maximum packet size; encoded as 0,1,2,3 = 8,16,32,64 */
93 * struct usb_device - information about a USB device
95 * With driver model both UCLASS_USB (the USB controllers) and UCLASS_USB_HUB
96 * (the hubs) have this as parent data. Hubs are children of controllers or
97 * other hubs and there is always a single root hub for each controller.
98 * Therefore struct usb_device can always be accessed with
99 * dev_get_parent_priv(dev), where dev is a USB device.
101 * Pointers exist for obtaining both the device (could be any uclass) and
102 * controller (UCLASS_USB) from this structure. The controller does not have
103 * a struct usb_device since it is not a device.
106 int devnum; /* Device number on USB bus */
107 int speed; /* full/low/high */
108 char mf[32]; /* manufacturer */
109 char prod[32]; /* product */
110 char serial[32]; /* serial number */
112 /* Maximum packet size; one of: PACKET_SIZE_* */
114 /* one bit for each endpoint ([0] = IN, [1] = OUT) */
115 unsigned int toggle[2];
116 /* endpoint halts; one bit per endpoint # & direction;
117 * [0] = IN, [1] = OUT
119 unsigned int halted[2];
120 int epmaxpacketin[16]; /* INput endpoint specific maximums */
121 int epmaxpacketout[16]; /* OUTput endpoint specific maximums */
123 int configno; /* selected config number */
124 /* Device Descriptor */
125 struct usb_device_descriptor descriptor
126 __attribute__((aligned(ARCH_DMA_MINALIGN)));
127 struct usb_config config; /* config descriptor */
129 int have_langid; /* whether string_langid is valid yet */
130 int string_langid; /* language ID for strings */
131 int (*irq_handle)(struct usb_device *dev);
132 unsigned long irq_status;
133 int irq_act_len; /* transfered bytes */
136 * Child devices - if this is a hub device
137 * Each instance needs its own set of data structures.
139 unsigned long status;
140 unsigned long int_pending; /* 1 bit per ep, used by int_queue */
141 int act_len; /* transfered bytes */
142 int maxchild; /* Number of ports if hub */
143 int portnr; /* Port number, 1=first */
144 #ifndef CONFIG_DM_USB
145 /* parent hub, or NULL if this is the root hub */
146 struct usb_device *parent;
147 struct usb_device *children[USB_MAXCHILDREN];
148 void *controller; /* hardware controller private data */
150 /* slot_id - for xHCI enabled devices */
151 unsigned int slot_id;
153 struct udevice *dev; /* Pointer to associated device */
154 struct udevice *controller_dev; /* Pointer to associated controller */
161 * You can initialize platform's USB host or device
162 * ports by passing this enum as an argument to
170 /**********************************************************************
171 * this is how the lowlevel part communicate with the outer world
174 int usb_lowlevel_init(int index, enum usb_init_type init, void **controller);
175 int usb_lowlevel_stop(int index);
177 #if defined(CONFIG_USB_MUSB_HOST) || defined(CONFIG_DM_USB)
178 int usb_reset_root_port(struct usb_device *dev);
180 #define usb_reset_root_port(dev)
183 int submit_bulk_msg(struct usb_device *dev, unsigned long pipe,
184 void *buffer, int transfer_len);
185 int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
186 int transfer_len, struct devrequest *setup);
187 int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
188 int transfer_len, int interval);
190 #if defined CONFIG_USB_EHCI || defined CONFIG_USB_MUSB_HOST || defined(CONFIG_DM_USB)
191 struct int_queue *create_int_queue(struct usb_device *dev, unsigned long pipe,
192 int queuesize, int elementsize, void *buffer, int interval);
193 int destroy_int_queue(struct usb_device *dev, struct int_queue *queue);
194 void *poll_int_queue(struct usb_device *dev, struct int_queue *queue);
198 #define USB_UHCI_VEND_ID 0x8086
199 #define USB_UHCI_DEV_ID 0x7112
202 * PXA25x can only act as USB device. There are drivers
203 * which works with USB CDC gadgets implementations.
204 * Some of them have common routines which can be used
205 * in boards init functions e.g. udc_disconnect() used for
206 * forced device disconnection from host.
208 extern void udc_disconnect(void);
211 * board-specific hardware initialization, called by
212 * usb drivers and u-boot commands
214 * @param index USB controller number
215 * @param init initializes controller as USB host or device
217 int board_usb_init(int index, enum usb_init_type init);
220 * can be used to clean up after failed USB initialization attempt
221 * vide: board_usb_init()
223 * @param index USB controller number for selective cleanup
224 * @param init usb_init_type passed to board_usb_init()
226 int board_usb_cleanup(int index, enum usb_init_type init);
228 #ifdef CONFIG_USB_STORAGE
230 #define USB_MAX_STOR_DEV 7
231 block_dev_desc_t *usb_stor_get_dev(int index);
232 int usb_stor_scan(int mode);
233 int usb_stor_info(void);
237 #ifdef CONFIG_USB_HOST_ETHER
239 #define USB_MAX_ETH_DEV 5
240 int usb_host_eth_scan(int mode);
244 #ifdef CONFIG_USB_KEYBOARD
246 int drv_usb_kbd_init(void);
247 int usb_kbd_deregister(int force);
251 int usb_init(void); /* initialize the USB Controller */
252 int usb_stop(void); /* stop the USB Controller */
253 int usb_detect_change(void); /* detect if a USB device has been (un)plugged */
256 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol);
257 int usb_set_idle(struct usb_device *dev, int ifnum, int duration,
259 int usb_control_msg(struct usb_device *dev, unsigned int pipe,
260 unsigned char request, unsigned char requesttype,
261 unsigned short value, unsigned short index,
262 void *data, unsigned short size, int timeout);
263 int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
264 void *data, int len, int *actual_length, int timeout);
265 int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe,
266 void *buffer, int transfer_len, int interval);
267 int usb_disable_asynch(int disable);
268 int usb_maxpacket(struct usb_device *dev, unsigned long pipe);
269 int usb_get_configuration_no(struct usb_device *dev, int cfgno,
270 unsigned char *buffer, int length);
271 int usb_get_configuration_len(struct usb_device *dev, int cfgno);
272 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type,
273 unsigned char id, void *buf, int size);
274 int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
275 unsigned char type, unsigned char id, void *buf,
277 int usb_clear_halt(struct usb_device *dev, int pipe);
278 int usb_string(struct usb_device *dev, int index, char *buf, size_t size);
279 int usb_set_interface(struct usb_device *dev, int interface, int alternate);
280 int usb_get_port_status(struct usb_device *dev, int port, void *data);
282 /* big endian -> little endian conversion */
283 /* some CPUs are already little endian e.g. the ARM920T */
284 #define __swap_16(x) \
285 ({ unsigned short x_ = (unsigned short)x; \
287 ((x_ & 0x00FFU) << 8) | ((x_ & 0xFF00U) >> 8)); \
289 #define __swap_32(x) \
290 ({ unsigned long x_ = (unsigned long)x; \
292 ((x_ & 0x000000FFUL) << 24) | \
293 ((x_ & 0x0000FF00UL) << 8) | \
294 ((x_ & 0x00FF0000UL) >> 8) | \
295 ((x_ & 0xFF000000UL) >> 24)); \
298 #ifdef __LITTLE_ENDIAN
299 # define swap_16(x) (x)
300 # define swap_32(x) (x)
302 # define swap_16(x) __swap_16(x)
303 # define swap_32(x) __swap_32(x)
307 * Calling this entity a "pipe" is glorifying it. A USB pipe
308 * is something embarrassingly simple: it basically consists
309 * of the following information:
310 * - device number (7 bits)
311 * - endpoint number (4 bits)
312 * - current Data0/1 state (1 bit)
313 * - direction (1 bit)
315 * - max packet size (2 bits: 8, 16, 32 or 64)
316 * - pipe type (2 bits: control, interrupt, bulk, isochronous)
318 * That's 18 bits. Really. Nothing more. And the USB people have
319 * documented these eighteen bits as some kind of glorious
320 * virtual data structure.
322 * Let's not fall in that trap. We'll just encode it as a simple
323 * unsigned int. The encoding is:
325 * - max size: bits 0-1 (00 = 8, 01 = 16, 10 = 32, 11 = 64)
326 * - direction: bit 7 (0 = Host-to-Device [Out],
327 * (1 = Device-to-Host [In])
328 * - device: bits 8-14
329 * - endpoint: bits 15-18
331 * - pipe type: bits 30-31 (00 = isochronous, 01 = interrupt,
332 * 10 = control, 11 = bulk)
334 * Why? Because it's arbitrary, and whatever encoding we select is really
335 * up to us. This one happens to share a lot of bit positions with the UHCI
336 * specification, so that much of the uhci driver can just mask the bits
339 /* Create various pipes... */
340 #define create_pipe(dev,endpoint) \
341 (((dev)->devnum << 8) | ((endpoint) << 15) | \
342 (dev)->maxpacketsize)
343 #define default_pipe(dev) ((dev)->speed << 26)
345 #define usb_sndctrlpipe(dev, endpoint) ((PIPE_CONTROL << 30) | \
346 create_pipe(dev, endpoint))
347 #define usb_rcvctrlpipe(dev, endpoint) ((PIPE_CONTROL << 30) | \
348 create_pipe(dev, endpoint) | \
350 #define usb_sndisocpipe(dev, endpoint) ((PIPE_ISOCHRONOUS << 30) | \
351 create_pipe(dev, endpoint))
352 #define usb_rcvisocpipe(dev, endpoint) ((PIPE_ISOCHRONOUS << 30) | \
353 create_pipe(dev, endpoint) | \
355 #define usb_sndbulkpipe(dev, endpoint) ((PIPE_BULK << 30) | \
356 create_pipe(dev, endpoint))
357 #define usb_rcvbulkpipe(dev, endpoint) ((PIPE_BULK << 30) | \
358 create_pipe(dev, endpoint) | \
360 #define usb_sndintpipe(dev, endpoint) ((PIPE_INTERRUPT << 30) | \
361 create_pipe(dev, endpoint))
362 #define usb_rcvintpipe(dev, endpoint) ((PIPE_INTERRUPT << 30) | \
363 create_pipe(dev, endpoint) | \
365 #define usb_snddefctrl(dev) ((PIPE_CONTROL << 30) | \
367 #define usb_rcvdefctrl(dev) ((PIPE_CONTROL << 30) | \
368 default_pipe(dev) | \
371 /* The D0/D1 toggle bits */
372 #define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> ep) & 1)
373 #define usb_dotoggle(dev, ep, out) ((dev)->toggle[out] ^= (1 << ep))
374 #define usb_settoggle(dev, ep, out, bit) ((dev)->toggle[out] = \
375 ((dev)->toggle[out] & \
376 ~(1 << ep)) | ((bit) << ep))
378 /* Endpoint halt control/status */
379 #define usb_endpoint_out(ep_dir) (((ep_dir >> 7) & 1) ^ 1)
380 #define usb_endpoint_halt(dev, ep, out) ((dev)->halted[out] |= (1 << (ep)))
381 #define usb_endpoint_running(dev, ep, out) ((dev)->halted[out] &= ~(1 << (ep)))
382 #define usb_endpoint_halted(dev, ep, out) ((dev)->halted[out] & (1 << (ep)))
384 #define usb_packetid(pipe) (((pipe) & USB_DIR_IN) ? USB_PID_IN : \
387 #define usb_pipeout(pipe) ((((pipe) >> 7) & 1) ^ 1)
388 #define usb_pipein(pipe) (((pipe) >> 7) & 1)
389 #define usb_pipedevice(pipe) (((pipe) >> 8) & 0x7f)
390 #define usb_pipe_endpdev(pipe) (((pipe) >> 8) & 0x7ff)
391 #define usb_pipeendpoint(pipe) (((pipe) >> 15) & 0xf)
392 #define usb_pipedata(pipe) (((pipe) >> 19) & 1)
393 #define usb_pipetype(pipe) (((pipe) >> 30) & 3)
394 #define usb_pipeisoc(pipe) (usb_pipetype((pipe)) == PIPE_ISOCHRONOUS)
395 #define usb_pipeint(pipe) (usb_pipetype((pipe)) == PIPE_INTERRUPT)
396 #define usb_pipecontrol(pipe) (usb_pipetype((pipe)) == PIPE_CONTROL)
397 #define usb_pipebulk(pipe) (usb_pipetype((pipe)) == PIPE_BULK)
399 #define usb_pipe_ep_index(pipe) \
400 usb_pipecontrol(pipe) ? (usb_pipeendpoint(pipe) * 2) : \
401 ((usb_pipeendpoint(pipe) * 2) - \
402 (usb_pipein(pipe) ? 0 : 1))
405 * struct usb_device_id - identifies USB devices for probing and hotplugging
406 * @match_flags: Bit mask controlling which of the other fields are used to
407 * match against new devices. Any field except for driver_info may be
408 * used, although some only make sense in conjunction with other fields.
409 * This is usually set by a USB_DEVICE_*() macro, which sets all
410 * other fields in this structure except for driver_info.
411 * @idVendor: USB vendor ID for a device; numbers are assigned
412 * by the USB forum to its members.
413 * @idProduct: Vendor-assigned product ID.
414 * @bcdDevice_lo: Low end of range of vendor-assigned product version numbers.
415 * This is also used to identify individual product versions, for
416 * a range consisting of a single device.
417 * @bcdDevice_hi: High end of version number range. The range of product
418 * versions is inclusive.
419 * @bDeviceClass: Class of device; numbers are assigned
420 * by the USB forum. Products may choose to implement classes,
421 * or be vendor-specific. Device classes specify behavior of all
422 * the interfaces on a device.
423 * @bDeviceSubClass: Subclass of device; associated with bDeviceClass.
424 * @bDeviceProtocol: Protocol of device; associated with bDeviceClass.
425 * @bInterfaceClass: Class of interface; numbers are assigned
426 * by the USB forum. Products may choose to implement classes,
427 * or be vendor-specific. Interface classes specify behavior only
428 * of a given interface; other interfaces may support other classes.
429 * @bInterfaceSubClass: Subclass of interface; associated with bInterfaceClass.
430 * @bInterfaceProtocol: Protocol of interface; associated with bInterfaceClass.
431 * @bInterfaceNumber: Number of interface; composite devices may use
432 * fixed interface numbers to differentiate between vendor-specific
434 * @driver_info: Holds information used by the driver. Usually it holds
435 * a pointer to a descriptor understood by the driver, or perhaps
438 * In most cases, drivers will create a table of device IDs by using
439 * USB_DEVICE(), or similar macros designed for that purpose.
440 * They will then export it to userspace using MODULE_DEVICE_TABLE(),
441 * and provide it to the USB core through their usb_driver structure.
443 * See the usb_match_id() function for information about how matches are
444 * performed. Briefly, you will normally use one of several macros to help
445 * construct these entries. Each entry you provide will either identify
446 * one or more specific products, or will identify a class of products
447 * which have agreed to behave the same. You should put the more specific
448 * matches towards the beginning of your table, so that driver_info can
449 * record quirks of specific products.
451 struct usb_device_id {
452 /* which fields to match against? */
455 /* Used for product specific matches; range is inclusive */
461 /* Used for device class matches */
466 /* Used for interface class matches */
468 u8 bInterfaceSubClass;
469 u8 bInterfaceProtocol;
471 /* Used for vendor-specific interface matches */
474 /* not matched against */
478 /* Some useful macros to use to create struct usb_device_id */
479 #define USB_DEVICE_ID_MATCH_VENDOR 0x0001
480 #define USB_DEVICE_ID_MATCH_PRODUCT 0x0002
481 #define USB_DEVICE_ID_MATCH_DEV_LO 0x0004
482 #define USB_DEVICE_ID_MATCH_DEV_HI 0x0008
483 #define USB_DEVICE_ID_MATCH_DEV_CLASS 0x0010
484 #define USB_DEVICE_ID_MATCH_DEV_SUBCLASS 0x0020
485 #define USB_DEVICE_ID_MATCH_DEV_PROTOCOL 0x0040
486 #define USB_DEVICE_ID_MATCH_INT_CLASS 0x0080
487 #define USB_DEVICE_ID_MATCH_INT_SUBCLASS 0x0100
488 #define USB_DEVICE_ID_MATCH_INT_PROTOCOL 0x0200
489 #define USB_DEVICE_ID_MATCH_INT_NUMBER 0x0400
491 /* Match anything, indicates this is a valid entry even if everything is 0 */
492 #define USB_DEVICE_ID_MATCH_NONE 0x0800
493 #define USB_DEVICE_ID_MATCH_ALL 0x07ff
496 * struct usb_driver_entry - Matches a driver to its usb_device_ids
497 * @driver: Driver to use
498 * @match: List of match records for this driver, terminated by {}
500 struct usb_driver_entry {
501 struct driver *driver;
502 const struct usb_device_id *match;
505 #define USB_DEVICE_ID_MATCH_DEVICE \
506 (USB_DEVICE_ID_MATCH_VENDOR | USB_DEVICE_ID_MATCH_PRODUCT)
509 * USB_DEVICE - macro used to describe a specific usb device
510 * @vend: the 16 bit USB Vendor ID
511 * @prod: the 16 bit USB Product ID
513 * This macro is used to create a struct usb_device_id that matches a
516 #define USB_DEVICE(vend, prod) \
517 .match_flags = USB_DEVICE_ID_MATCH_DEVICE, \
518 .idVendor = (vend), \
521 #define U_BOOT_USB_DEVICE(__name, __match) \
522 ll_entry_declare(struct usb_driver_entry, __name, usb_driver_entry) = {\
523 .driver = llsym(struct driver, __name, driver), \
527 /*************************************************************************
530 struct usb_port_status {
531 unsigned short wPortStatus;
532 unsigned short wPortChange;
533 } __attribute__ ((packed));
535 struct usb_hub_status {
536 unsigned short wHubStatus;
537 unsigned short wHubChange;
538 } __attribute__ ((packed));
542 struct usb_hub_descriptor {
543 unsigned char bLength;
544 unsigned char bDescriptorType;
545 unsigned char bNbrPorts;
546 unsigned short wHubCharacteristics;
547 unsigned char bPwrOn2PwrGood;
548 unsigned char bHubContrCurrent;
549 unsigned char DeviceRemovable[(USB_MAXCHILDREN+1+7)/8];
550 unsigned char PortPowerCtrlMask[(USB_MAXCHILDREN+1+7)/8];
551 /* DeviceRemovable and PortPwrCtrlMask want to be variable-length
552 bitmaps that hold max 255 entries. (bit0 is ignored) */
553 } __attribute__ ((packed));
556 struct usb_hub_device {
557 struct usb_device *pusb_dev;
558 struct usb_hub_descriptor desc;
563 * struct usb_platdata - Platform data about a USB controller
565 * Given a USB controller (UCLASS_USB) dev this is dev_get_platdata(dev)
567 struct usb_platdata {
568 enum usb_init_type init_type;
572 * struct usb_dev_platdata - Platform data about a USB device
574 * Given a USB device dev this structure is dev_get_parent_platdata(dev).
575 * This is used by sandbox to provide emulation data also.
577 * @id: ID used to match this device
578 * @devnum: Device address on the USB bus
579 * @udev: usb-uclass internal use only do NOT use
580 * @strings: List of descriptor strings (for sandbox emulation purposes)
581 * @desc_list: List of descriptors (for sandbox emulation purposes)
583 struct usb_dev_platdata {
584 struct usb_device_id id;
587 * This pointer is used to pass the usb_device used in usb_scan_device,
588 * to get the usb descriptors before the driver is known, to the
589 * actual udevice once the driver is known and the udevice is created.
590 * This will be NULL except during probe, do NOT use.
592 * This should eventually go away.
594 struct usb_device *udev;
595 #ifdef CONFIG_SANDBOX
596 struct usb_string *strings;
597 /* NULL-terminated list of descriptor pointers */
598 struct usb_generic_descriptor **desc_list;
604 * struct usb_bus_priv - information about the USB controller
606 * Given a USB controller (UCLASS_USB) 'dev', this is
607 * dev_get_uclass_priv(dev).
609 * @next_addr: Next device address to allocate minus 1. Incremented by 1
610 * each time a new device address is set, so this holds the
611 * number of devices on the bus
612 * @desc_before_addr: true if we can read a device descriptor before it
613 * has been assigned an address. For XHCI this is not possible
614 * so this will be false.
615 * @companion: True if this is a companion controller to another USB
618 struct usb_bus_priv {
620 bool desc_before_addr;
625 * struct dm_usb_ops - USB controller operations
627 * This defines the operations supoorted on a USB controller. Common
630 * @bus: USB bus (i.e. controller), which is in UCLASS_USB.
631 * @udev: USB device parent data. Controllers are not expected to need
632 * this, since the device address on the bus is encoded in @pipe.
633 * It is used for sandbox, and can be handy for debugging and
635 * @pipe: An assortment of bitfields which provide address and packet
636 * type information. See create_pipe() above for encoding
638 * @buffer: A buffer to use for sending/receiving. This should be
640 * @length: Buffer length in bytes
644 * control() - Send a control message
646 * Most parameters are as above.
648 * @setup: Additional setup information required by the message
650 int (*control)(struct udevice *bus, struct usb_device *udev,
651 unsigned long pipe, void *buffer, int length,
652 struct devrequest *setup);
654 * bulk() - Send a bulk message
656 * Parameters are as above.
658 int (*bulk)(struct udevice *bus, struct usb_device *udev,
659 unsigned long pipe, void *buffer, int length);
661 * interrupt() - Send an interrupt message
663 * Most parameters are as above.
665 * @interval: Interrupt interval
667 int (*interrupt)(struct udevice *bus, struct usb_device *udev,
668 unsigned long pipe, void *buffer, int length,
672 * create_int_queue() - Create and queue interrupt packets
674 * Create and queue @queuesize number of interrupt usb packets of
675 * @elementsize bytes each. @buffer must be atleast @queuesize *
676 * @elementsize bytes.
678 * Note some controllers only support a queuesize of 1.
680 * @interval: Interrupt interval
682 * @return A pointer to the created interrupt queue or NULL on error
684 struct int_queue * (*create_int_queue)(struct udevice *bus,
685 struct usb_device *udev, unsigned long pipe,
686 int queuesize, int elementsize, void *buffer,
690 * poll_int_queue() - Poll an interrupt queue for completed packets
692 * Poll an interrupt queue for completed packets. The return value
693 * points to the part of the buffer passed to create_int_queue()
694 * corresponding to the completed packet.
696 * @queue: queue to poll
698 * @return Pointer to the data of the first completed packet, or
699 * NULL if no packets are ready
701 void * (*poll_int_queue)(struct udevice *bus, struct usb_device *udev,
702 struct int_queue *queue);
705 * destroy_int_queue() - Destroy an interrupt queue
707 * Destroy an interrupt queue created by create_int_queue().
709 * @queue: queue to poll
711 * @return 0 if OK, -ve on error
713 int (*destroy_int_queue)(struct udevice *bus, struct usb_device *udev,
714 struct int_queue *queue);
717 * alloc_device() - Allocate a new device context (XHCI)
719 * Before sending packets to a new device on an XHCI bus, a device
720 * context must be created. If this method is not NULL it will be
721 * called before the device is enumerated (even before its descriptor
722 * is read). This should be NULL for EHCI, which does not need this.
724 int (*alloc_device)(struct udevice *bus, struct usb_device *udev);
727 * reset_root_port() - Reset usb root port
729 int (*reset_root_port)(struct udevice *bus, struct usb_device *udev);
732 #define usb_get_ops(dev) ((struct dm_usb_ops *)(dev)->driver->ops)
733 #define usb_get_emul_ops(dev) ((struct dm_usb_ops *)(dev)->driver->ops)
736 * usb_get_dev_index() - look up a device index number
738 * Look up devices using their index number (starting at 0). This works since
739 * in U-Boot device addresses are allocated starting at 1 with no gaps.
741 * TODO(sjg@chromium.org): Remove this function when usb_ether.c is modified
742 * to work better with driver model.
744 * @bus: USB bus to check
745 * @index: Index number of device to find (0=first). This is just the
746 * device address less 1.
748 struct usb_device *usb_get_dev_index(struct udevice *bus, int index);
751 * usb_setup_device() - set up a device ready for use
753 * @dev: USB device pointer. This need not be a real device - it is
754 * common for it to just be a local variable with its ->dev
755 * member (i.e. @dev->dev) set to the parent device and
756 * dev->portnr set to the port number on the hub (1=first)
757 * @do_read: true to read the device descriptor before an address is set
758 * (should be false for XHCI buses, true otherwise)
759 * @parent: Parent device (either UCLASS_USB or UCLASS_USB_HUB)
760 * @return 0 if OK, -ve on error */
761 int usb_setup_device(struct usb_device *dev, bool do_read,
762 struct usb_device *parent);
765 * usb_hub_scan() - Scan a hub and find its devices
767 * @hub: Hub device to scan
769 int usb_hub_scan(struct udevice *hub);
772 * usb_scan_device() - Scan a device on a bus
774 * Scan a device on a bus. It has already been detected and is ready to
775 * be enumerated. This may be either the root hub (@parent is a bus) or a
776 * normal device (@parent is a hub)
778 * @parent: Parent device
779 * @port: Hub port number (numbered from 1)
780 * @speed: USB speed to use for this device
781 * @devp: Returns pointer to device if all is well
782 * @return 0 if OK, -ve on error
784 int usb_scan_device(struct udevice *parent, int port,
785 enum usb_device_speed speed, struct udevice **devp);
788 * usb_get_bus() - Find the bus for a device
790 * Search up through parents to find the bus this device is connected to. This
791 * will be a device with uclass UCLASS_USB.
793 * @dev: Device to check
794 * @return The bus, or NULL if not found (this indicates a critical error in
797 struct udevice *usb_get_bus(struct udevice *dev);
800 * usb_select_config() - Set up a device ready for use
802 * This function assumes that the device already has an address and a driver
803 * bound, and is ready to be set up.
805 * This re-reads the device and configuration descriptors and sets the
808 * @dev: Device to set up
810 int usb_select_config(struct usb_device *dev);
813 * usb_child_pre_probe() - Pre-probe function for USB devices
815 * This is called on all children of hubs and USB controllers (i.e. UCLASS_USB
816 * and UCLASS_USB_HUB) when a new device is about to be probed. It sets up the
817 * device from the saved platform data and calls usb_select_config() to
820 * Once this is done, the device's normal driver can take over, knowing the
821 * device is accessible on the USB bus.
823 * This function is for use only by the internal USB stack.
825 * @dev: Device to set up
827 int usb_child_pre_probe(struct udevice *dev);
832 * usb_setup_ehci_gadget() - Set up a USB device as a gadget
834 * TODO(sjg@chromium.org): Tidy this up when USB gadgets can use driver model
836 * This provides a way to tell a controller to start up as a USB device
837 * instead of as a host. It is untested.
839 int usb_setup_ehci_gadget(struct ehci_ctrl **ctlrp);
842 * usb_stor_reset() - Prepare to scan USB storage devices
844 * Empty the list of USB storage devices in preparation for scanning them.
845 * This must be called before a USB scan.
847 void usb_stor_reset(void);
849 #else /* !CONFIG_DM_USB */
851 struct usb_device *usb_get_dev_index(int index);
855 bool usb_device_has_child_on_port(struct usb_device *parent, int port);
857 int usb_hub_probe(struct usb_device *dev, int ifnum);
858 void usb_hub_reset(void);
861 * legacy_hub_port_reset() - reset a port given its usb_device pointer
863 * Reset a hub port and see if a device is present on that port, providing
864 * sufficient time for it to show itself. The port status is returned.
866 * With driver model this moves to hub_port_reset() and is passed a struct
869 * @dev: USB device to reset
870 * @port: Port number to reset (note ports are numbered from 0 here)
871 * @portstat: Returns port status
873 int legacy_hub_port_reset(struct usb_device *dev, int port,
874 unsigned short *portstat);
876 int hub_port_reset(struct udevice *dev, int port, unsigned short *portstat);
879 * usb_find_usb2_hub_address_port() - Get hub address and port for TT setting
881 * Searches for the first HS hub above the given device. If a
882 * HS hub is found, the hub address and the port the device is
883 * connected to is return, as required for SPLIT transactions
885 * @param: udev full speed or low speed device
887 void usb_find_usb2_hub_address_port(struct usb_device *udev,
888 uint8_t *hub_address, uint8_t *hub_port);
891 * usb_alloc_new_device() - Allocate a new device
893 * @devp: returns a pointer of a new device structure. With driver model this
894 * is a device pointer, but with legacy USB this pointer is
896 * @return 0 if OK, -ENOSPC if we have found out of room for new devices
898 int usb_alloc_new_device(struct udevice *controller, struct usb_device **devp);
901 * usb_free_device() - Free a partially-inited device
903 * This is an internal function. It is used to reverse the action of
904 * usb_alloc_new_device() when we hit a problem during init.
906 void usb_free_device(struct udevice *controller);
908 int usb_new_device(struct usb_device *dev);
910 int usb_alloc_device(struct usb_device *dev);
913 * usb_emul_setup_device() - Set up a new USB device emulation
915 * This is normally called when a new emulation device is bound. It tells
916 * the USB emulation uclass about the features of the emulator.
918 * @dev: Emulation device
919 * @maxpacketsize: Maximum packet size (e.g. PACKET_SIZE_64)
920 * @strings: List of USB string descriptors, terminated by a NULL
922 * @desc_list: List of points or USB descriptors, terminated by NULL.
923 * The first entry must be struct usb_device_descriptor,
924 * and others follow on after that.
925 * @return 0 if OK, -ve on error
927 int usb_emul_setup_device(struct udevice *dev, int maxpacketsize,
928 struct usb_string *strings, void **desc_list);
931 * usb_emul_control() - Send a control packet to an emulator
933 * @emul: Emulator device
934 * @udev: USB device (which the emulator is causing to appear)
935 * See struct dm_usb_ops for details on other parameters
936 * @return 0 if OK, -ve on error
938 int usb_emul_control(struct udevice *emul, struct usb_device *udev,
939 unsigned long pipe, void *buffer, int length,
940 struct devrequest *setup);
943 * usb_emul_bulk() - Send a bulk packet to an emulator
945 * @emul: Emulator device
946 * @udev: USB device (which the emulator is causing to appear)
947 * See struct dm_usb_ops for details on other parameters
948 * @return 0 if OK, -ve on error
950 int usb_emul_bulk(struct udevice *emul, struct usb_device *udev,
951 unsigned long pipe, void *buffer, int length);
954 * usb_emul_int() - Send an interrupt packet to an emulator
956 * @emul: Emulator device
957 * @udev: USB device (which the emulator is causing to appear)
958 * See struct dm_usb_ops for details on other parameters
959 * @return 0 if OK, -ve on error
961 int usb_emul_int(struct udevice *emul, struct usb_device *udev,
962 unsigned long pipe, void *buffer, int length, int interval);
965 * usb_emul_find() - Find an emulator for a particular device
967 * Check @pipe to find a device number on bus @bus and return it.
969 * @bus: USB bus (controller)
970 * @pipe: Describes pipe being used, and includes the device number
971 * @emulp: Returns pointer to emulator, or NULL if not found
972 * @return 0 if found, -ve on error
974 int usb_emul_find(struct udevice *bus, ulong pipe, struct udevice **emulp);
977 * usb_emul_find_for_dev() - Find an emulator for a particular device
979 * @bus: USB bus (controller)
980 * @dev: USB device to check
981 * @emulp: Returns pointer to emulator, or NULL if not found
982 * @return 0 if found, -ve on error
984 int usb_emul_find_for_dev(struct udevice *dev, struct udevice **emulp);
987 * usb_emul_reset() - Reset all emulators ready for use
989 * Clear out any address information in the emulators and make then ready for
992 void usb_emul_reset(struct udevice *dev);
995 * usb_show_tree() - show the USB device tree
997 * This shows a list of active USB devices along with basic information about
1000 void usb_show_tree(void);