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_parentdata(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 #if defined(CONFIG_USB_UHCI) || defined(CONFIG_USB_OHCI) || \
175 defined(CONFIG_USB_EHCI) || defined(CONFIG_USB_OHCI_NEW) || \
176 defined(CONFIG_USB_SL811HS) || defined(CONFIG_USB_ISP116X_HCD) || \
177 defined(CONFIG_USB_R8A66597_HCD) || defined(CONFIG_USB_DAVINCI) || \
178 defined(CONFIG_USB_OMAP3) || defined(CONFIG_USB_DA8XX) || \
179 defined(CONFIG_USB_BLACKFIN) || defined(CONFIG_USB_AM35X) || \
180 defined(CONFIG_USB_MUSB_DSPS) || defined(CONFIG_USB_MUSB_AM35X) || \
181 defined(CONFIG_USB_MUSB_OMAP2PLUS) || defined(CONFIG_USB_MUSB_SUNXI) || \
182 defined(CONFIG_USB_XHCI) || defined(CONFIG_USB_DWC2) || \
183 defined(CONFIG_USB_EMUL)
185 int usb_lowlevel_init(int index, enum usb_init_type init, void **controller);
186 int usb_lowlevel_stop(int index);
188 #if defined(CONFIG_MUSB_HOST) || defined(CONFIG_DM_USB)
189 int usb_reset_root_port(void);
191 #define usb_reset_root_port()
194 int submit_bulk_msg(struct usb_device *dev, unsigned long pipe,
195 void *buffer, int transfer_len);
196 int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
197 int transfer_len, struct devrequest *setup);
198 int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
199 int transfer_len, int interval);
201 #if defined CONFIG_USB_EHCI || defined CONFIG_MUSB_HOST || defined(CONFIG_DM_USB)
202 struct int_queue *create_int_queue(struct usb_device *dev, unsigned long pipe,
203 int queuesize, int elementsize, void *buffer, int interval);
204 int destroy_int_queue(struct usb_device *dev, struct int_queue *queue);
205 void *poll_int_queue(struct usb_device *dev, struct int_queue *queue);
209 #define USB_UHCI_VEND_ID 0x8086
210 #define USB_UHCI_DEV_ID 0x7112
213 * PXA25x can only act as USB device. There are drivers
214 * which works with USB CDC gadgets implementations.
215 * Some of them have common routines which can be used
216 * in boards init functions e.g. udc_disconnect() used for
217 * forced device disconnection from host.
219 #elif defined(CONFIG_USB_GADGET_PXA2XX)
221 extern void udc_disconnect(void);
226 * board-specific hardware initialization, called by
227 * usb drivers and u-boot commands
229 * @param index USB controller number
230 * @param init initializes controller as USB host or device
232 int board_usb_init(int index, enum usb_init_type init);
235 * can be used to clean up after failed USB initialization attempt
236 * vide: board_usb_init()
238 * @param index USB controller number for selective cleanup
239 * @param init usb_init_type passed to board_usb_init()
241 int board_usb_cleanup(int index, enum usb_init_type init);
243 #ifdef CONFIG_USB_STORAGE
245 #define USB_MAX_STOR_DEV 5
246 block_dev_desc_t *usb_stor_get_dev(int index);
247 int usb_stor_scan(int mode);
248 int usb_stor_info(void);
252 #ifdef CONFIG_USB_HOST_ETHER
254 #define USB_MAX_ETH_DEV 5
255 int usb_host_eth_scan(int mode);
259 #ifdef CONFIG_USB_KEYBOARD
261 int drv_usb_kbd_init(void);
262 int usb_kbd_deregister(int force);
266 int usb_init(void); /* initialize the USB Controller */
267 int usb_stop(void); /* stop the USB Controller */
268 int usb_detect_change(void); /* detect if a USB device has been (un)plugged */
271 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol);
272 int usb_set_idle(struct usb_device *dev, int ifnum, int duration,
274 int usb_control_msg(struct usb_device *dev, unsigned int pipe,
275 unsigned char request, unsigned char requesttype,
276 unsigned short value, unsigned short index,
277 void *data, unsigned short size, int timeout);
278 int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
279 void *data, int len, int *actual_length, int timeout);
280 int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe,
281 void *buffer, int transfer_len, int interval);
282 int usb_disable_asynch(int disable);
283 int usb_maxpacket(struct usb_device *dev, unsigned long pipe);
284 int usb_get_configuration_no(struct usb_device *dev, unsigned char *buffer,
286 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type,
287 unsigned char id, void *buf, int size);
288 int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
289 unsigned char type, unsigned char id, void *buf,
291 int usb_clear_halt(struct usb_device *dev, int pipe);
292 int usb_string(struct usb_device *dev, int index, char *buf, size_t size);
293 int usb_set_interface(struct usb_device *dev, int interface, int alternate);
294 int usb_get_port_status(struct usb_device *dev, int port, void *data);
296 /* big endian -> little endian conversion */
297 /* some CPUs are already little endian e.g. the ARM920T */
298 #define __swap_16(x) \
299 ({ unsigned short x_ = (unsigned short)x; \
301 ((x_ & 0x00FFU) << 8) | ((x_ & 0xFF00U) >> 8)); \
303 #define __swap_32(x) \
304 ({ unsigned long x_ = (unsigned long)x; \
306 ((x_ & 0x000000FFUL) << 24) | \
307 ((x_ & 0x0000FF00UL) << 8) | \
308 ((x_ & 0x00FF0000UL) >> 8) | \
309 ((x_ & 0xFF000000UL) >> 24)); \
312 #ifdef __LITTLE_ENDIAN
313 # define swap_16(x) (x)
314 # define swap_32(x) (x)
316 # define swap_16(x) __swap_16(x)
317 # define swap_32(x) __swap_32(x)
321 * Calling this entity a "pipe" is glorifying it. A USB pipe
322 * is something embarrassingly simple: it basically consists
323 * of the following information:
324 * - device number (7 bits)
325 * - endpoint number (4 bits)
326 * - current Data0/1 state (1 bit)
327 * - direction (1 bit)
329 * - max packet size (2 bits: 8, 16, 32 or 64)
330 * - pipe type (2 bits: control, interrupt, bulk, isochronous)
332 * That's 18 bits. Really. Nothing more. And the USB people have
333 * documented these eighteen bits as some kind of glorious
334 * virtual data structure.
336 * Let's not fall in that trap. We'll just encode it as a simple
337 * unsigned int. The encoding is:
339 * - max size: bits 0-1 (00 = 8, 01 = 16, 10 = 32, 11 = 64)
340 * - direction: bit 7 (0 = Host-to-Device [Out],
341 * (1 = Device-to-Host [In])
342 * - device: bits 8-14
343 * - endpoint: bits 15-18
345 * - pipe type: bits 30-31 (00 = isochronous, 01 = interrupt,
346 * 10 = control, 11 = bulk)
348 * Why? Because it's arbitrary, and whatever encoding we select is really
349 * up to us. This one happens to share a lot of bit positions with the UHCI
350 * specification, so that much of the uhci driver can just mask the bits
353 /* Create various pipes... */
354 #define create_pipe(dev,endpoint) \
355 (((dev)->devnum << 8) | ((endpoint) << 15) | \
356 (dev)->maxpacketsize)
357 #define default_pipe(dev) ((dev)->speed << 26)
359 #define usb_sndctrlpipe(dev, endpoint) ((PIPE_CONTROL << 30) | \
360 create_pipe(dev, endpoint))
361 #define usb_rcvctrlpipe(dev, endpoint) ((PIPE_CONTROL << 30) | \
362 create_pipe(dev, endpoint) | \
364 #define usb_sndisocpipe(dev, endpoint) ((PIPE_ISOCHRONOUS << 30) | \
365 create_pipe(dev, endpoint))
366 #define usb_rcvisocpipe(dev, endpoint) ((PIPE_ISOCHRONOUS << 30) | \
367 create_pipe(dev, endpoint) | \
369 #define usb_sndbulkpipe(dev, endpoint) ((PIPE_BULK << 30) | \
370 create_pipe(dev, endpoint))
371 #define usb_rcvbulkpipe(dev, endpoint) ((PIPE_BULK << 30) | \
372 create_pipe(dev, endpoint) | \
374 #define usb_sndintpipe(dev, endpoint) ((PIPE_INTERRUPT << 30) | \
375 create_pipe(dev, endpoint))
376 #define usb_rcvintpipe(dev, endpoint) ((PIPE_INTERRUPT << 30) | \
377 create_pipe(dev, endpoint) | \
379 #define usb_snddefctrl(dev) ((PIPE_CONTROL << 30) | \
381 #define usb_rcvdefctrl(dev) ((PIPE_CONTROL << 30) | \
382 default_pipe(dev) | \
385 /* The D0/D1 toggle bits */
386 #define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> ep) & 1)
387 #define usb_dotoggle(dev, ep, out) ((dev)->toggle[out] ^= (1 << ep))
388 #define usb_settoggle(dev, ep, out, bit) ((dev)->toggle[out] = \
389 ((dev)->toggle[out] & \
390 ~(1 << ep)) | ((bit) << ep))
392 /* Endpoint halt control/status */
393 #define usb_endpoint_out(ep_dir) (((ep_dir >> 7) & 1) ^ 1)
394 #define usb_endpoint_halt(dev, ep, out) ((dev)->halted[out] |= (1 << (ep)))
395 #define usb_endpoint_running(dev, ep, out) ((dev)->halted[out] &= ~(1 << (ep)))
396 #define usb_endpoint_halted(dev, ep, out) ((dev)->halted[out] & (1 << (ep)))
398 #define usb_packetid(pipe) (((pipe) & USB_DIR_IN) ? USB_PID_IN : \
401 #define usb_pipeout(pipe) ((((pipe) >> 7) & 1) ^ 1)
402 #define usb_pipein(pipe) (((pipe) >> 7) & 1)
403 #define usb_pipedevice(pipe) (((pipe) >> 8) & 0x7f)
404 #define usb_pipe_endpdev(pipe) (((pipe) >> 8) & 0x7ff)
405 #define usb_pipeendpoint(pipe) (((pipe) >> 15) & 0xf)
406 #define usb_pipedata(pipe) (((pipe) >> 19) & 1)
407 #define usb_pipetype(pipe) (((pipe) >> 30) & 3)
408 #define usb_pipeisoc(pipe) (usb_pipetype((pipe)) == PIPE_ISOCHRONOUS)
409 #define usb_pipeint(pipe) (usb_pipetype((pipe)) == PIPE_INTERRUPT)
410 #define usb_pipecontrol(pipe) (usb_pipetype((pipe)) == PIPE_CONTROL)
411 #define usb_pipebulk(pipe) (usb_pipetype((pipe)) == PIPE_BULK)
413 #define usb_pipe_ep_index(pipe) \
414 usb_pipecontrol(pipe) ? (usb_pipeendpoint(pipe) * 2) : \
415 ((usb_pipeendpoint(pipe) * 2) - \
416 (usb_pipein(pipe) ? 0 : 1))
419 * struct usb_device_id - identifies USB devices for probing and hotplugging
420 * @match_flags: Bit mask controlling which of the other fields are used to
421 * match against new devices. Any field except for driver_info may be
422 * used, although some only make sense in conjunction with other fields.
423 * This is usually set by a USB_DEVICE_*() macro, which sets all
424 * other fields in this structure except for driver_info.
425 * @idVendor: USB vendor ID for a device; numbers are assigned
426 * by the USB forum to its members.
427 * @idProduct: Vendor-assigned product ID.
428 * @bcdDevice_lo: Low end of range of vendor-assigned product version numbers.
429 * This is also used to identify individual product versions, for
430 * a range consisting of a single device.
431 * @bcdDevice_hi: High end of version number range. The range of product
432 * versions is inclusive.
433 * @bDeviceClass: Class of device; numbers are assigned
434 * by the USB forum. Products may choose to implement classes,
435 * or be vendor-specific. Device classes specify behavior of all
436 * the interfaces on a device.
437 * @bDeviceSubClass: Subclass of device; associated with bDeviceClass.
438 * @bDeviceProtocol: Protocol of device; associated with bDeviceClass.
439 * @bInterfaceClass: Class of interface; numbers are assigned
440 * by the USB forum. Products may choose to implement classes,
441 * or be vendor-specific. Interface classes specify behavior only
442 * of a given interface; other interfaces may support other classes.
443 * @bInterfaceSubClass: Subclass of interface; associated with bInterfaceClass.
444 * @bInterfaceProtocol: Protocol of interface; associated with bInterfaceClass.
445 * @bInterfaceNumber: Number of interface; composite devices may use
446 * fixed interface numbers to differentiate between vendor-specific
448 * @driver_info: Holds information used by the driver. Usually it holds
449 * a pointer to a descriptor understood by the driver, or perhaps
452 * In most cases, drivers will create a table of device IDs by using
453 * USB_DEVICE(), or similar macros designed for that purpose.
454 * They will then export it to userspace using MODULE_DEVICE_TABLE(),
455 * and provide it to the USB core through their usb_driver structure.
457 * See the usb_match_id() function for information about how matches are
458 * performed. Briefly, you will normally use one of several macros to help
459 * construct these entries. Each entry you provide will either identify
460 * one or more specific products, or will identify a class of products
461 * which have agreed to behave the same. You should put the more specific
462 * matches towards the beginning of your table, so that driver_info can
463 * record quirks of specific products.
465 struct usb_device_id {
466 /* which fields to match against? */
469 /* Used for product specific matches; range is inclusive */
475 /* Used for device class matches */
480 /* Used for interface class matches */
482 u8 bInterfaceSubClass;
483 u8 bInterfaceProtocol;
485 /* Used for vendor-specific interface matches */
488 /* not matched against */
492 /* Some useful macros to use to create struct usb_device_id */
493 #define USB_DEVICE_ID_MATCH_VENDOR 0x0001
494 #define USB_DEVICE_ID_MATCH_PRODUCT 0x0002
495 #define USB_DEVICE_ID_MATCH_DEV_LO 0x0004
496 #define USB_DEVICE_ID_MATCH_DEV_HI 0x0008
497 #define USB_DEVICE_ID_MATCH_DEV_CLASS 0x0010
498 #define USB_DEVICE_ID_MATCH_DEV_SUBCLASS 0x0020
499 #define USB_DEVICE_ID_MATCH_DEV_PROTOCOL 0x0040
500 #define USB_DEVICE_ID_MATCH_INT_CLASS 0x0080
501 #define USB_DEVICE_ID_MATCH_INT_SUBCLASS 0x0100
502 #define USB_DEVICE_ID_MATCH_INT_PROTOCOL 0x0200
503 #define USB_DEVICE_ID_MATCH_INT_NUMBER 0x0400
505 /* Match anything, indicates this is a valid entry even if everything is 0 */
506 #define USB_DEVICE_ID_MATCH_NONE 0x0800
507 #define USB_DEVICE_ID_MATCH_ALL 0x07ff
510 * struct usb_driver_entry - Matches a driver to its usb_device_ids
511 * @compatible: Compatible string
512 * @data: Data for this compatible string
514 struct usb_driver_entry {
515 struct driver *driver;
516 const struct usb_device_id *match;
519 #define USB_DEVICE(__name, __match) \
520 ll_entry_declare(struct usb_driver_entry, __name, usb_driver_entry) = {\
521 .driver = llsym(struct driver, __name, driver), \
525 /*************************************************************************
528 struct usb_port_status {
529 unsigned short wPortStatus;
530 unsigned short wPortChange;
531 } __attribute__ ((packed));
533 struct usb_hub_status {
534 unsigned short wHubStatus;
535 unsigned short wHubChange;
536 } __attribute__ ((packed));
540 struct usb_hub_descriptor {
541 unsigned char bLength;
542 unsigned char bDescriptorType;
543 unsigned char bNbrPorts;
544 unsigned short wHubCharacteristics;
545 unsigned char bPwrOn2PwrGood;
546 unsigned char bHubContrCurrent;
547 unsigned char DeviceRemovable[(USB_MAXCHILDREN+1+7)/8];
548 unsigned char PortPowerCtrlMask[(USB_MAXCHILDREN+1+7)/8];
549 /* DeviceRemovable and PortPwrCtrlMask want to be variable-length
550 bitmaps that hold max 255 entries. (bit0 is ignored) */
551 } __attribute__ ((packed));
554 struct usb_hub_device {
555 struct usb_device *pusb_dev;
556 struct usb_hub_descriptor desc;
561 * struct usb_platdata - Platform data about a USB controller
563 * Given a USB controller (UCLASS_USB) dev this is dev_get_platdata(dev)
565 struct usb_platdata {
566 enum usb_init_type init_type;
570 * struct usb_dev_platdata - Platform data about a USB device
572 * Given a USB device dev this structure is dev_get_parent_platdata(dev).
573 * This is used by sandbox to provide emulation data also.
575 * @id: ID used to match this device
576 * @devnum: Device address on the USB bus
577 * @udev: usb-uclass internal use only do NOT use
578 * @strings: List of descriptor strings (for sandbox emulation purposes)
579 * @desc_list: List of descriptors (for sandbox emulation purposes)
581 struct usb_dev_platdata {
582 struct usb_device_id id;
585 * This pointer is used to pass the usb_device used in usb_scan_device,
586 * to get the usb descriptors before the driver is known, to the
587 * actual udevice once the driver is known and the udevice is created.
588 * This will be NULL except during probe, do NOT use.
590 * This should eventually go away.
592 struct usb_device *udev;
593 #ifdef CONFIG_SANDBOX
594 struct usb_string *strings;
595 /* NULL-terminated list of descriptor pointers */
596 struct usb_generic_descriptor **desc_list;
602 * struct usb_bus_priv - information about the USB controller
604 * Given a USB controller (UCLASS_USB) 'dev', this is
605 * dev_get_uclass_priv(dev).
607 * @next_addr: Next device address to allocate minus 1. Incremented by 1
608 * each time a new device address is set, so this holds the
609 * number of devices on the bus
610 * @desc_before_addr: true if we can read a device descriptor before it
611 * has been assigned an address. For XHCI this is not possible
612 * so this will be false.
613 * @companion: True if this is a companion controller to another USB
616 struct usb_bus_priv {
618 bool desc_before_addr;
623 * struct dm_usb_ops - USB controller operations
625 * This defines the operations supoorted on a USB controller. Common
628 * @bus: USB bus (i.e. controller), which is in UCLASS_USB.
629 * @udev: USB device parent data. Controllers are not expected to need
630 * this, since the device address on the bus is encoded in @pipe.
631 * It is used for sandbox, and can be handy for debugging and
633 * @pipe: An assortment of bitfields which provide address and packet
634 * type information. See create_pipe() above for encoding
636 * @buffer: A buffer to use for sending/receiving. This should be
638 * @length: Buffer length in bytes
642 * control() - Send a control message
644 * Most parameters are as above.
646 * @setup: Additional setup information required by the message
648 int (*control)(struct udevice *bus, struct usb_device *udev,
649 unsigned long pipe, void *buffer, int length,
650 struct devrequest *setup);
652 * bulk() - Send a bulk message
654 * Parameters are as above.
656 int (*bulk)(struct udevice *bus, struct usb_device *udev,
657 unsigned long pipe, void *buffer, int length);
659 * interrupt() - Send an interrupt message
661 * Most parameters are as above.
663 * @interval: Interrupt interval
665 int (*interrupt)(struct udevice *bus, struct usb_device *udev,
666 unsigned long pipe, void *buffer, int length,
670 * create_int_queue() - Create and queue interrupt packets
672 * Create and queue @queuesize number of interrupt usb packets of
673 * @elementsize bytes each. @buffer must be atleast @queuesize *
674 * @elementsize bytes.
676 * Note some controllers only support a queuesize of 1.
678 * @interval: Interrupt interval
680 * @return A pointer to the created interrupt queue or NULL on error
682 struct int_queue * (*create_int_queue)(struct udevice *bus,
683 struct usb_device *udev, unsigned long pipe,
684 int queuesize, int elementsize, void *buffer,
688 * poll_int_queue() - Poll an interrupt queue for completed packets
690 * Poll an interrupt queue for completed packets. The return value
691 * points to the part of the buffer passed to create_int_queue()
692 * corresponding to the completed packet.
694 * @queue: queue to poll
696 * @return Pointer to the data of the first completed packet, or
697 * NULL if no packets are ready
699 void * (*poll_int_queue)(struct udevice *bus, struct usb_device *udev,
700 struct int_queue *queue);
703 * destroy_int_queue() - Destroy an interrupt queue
705 * Destroy an interrupt queue created by create_int_queue().
707 * @queue: queue to poll
709 * @return 0 if OK, -ve on error
711 int (*destroy_int_queue)(struct udevice *bus, struct usb_device *udev,
712 struct int_queue *queue);
715 * alloc_device() - Allocate a new device context (XHCI)
717 * Before sending packets to a new device on an XHCI bus, a device
718 * context must be created. If this method is not NULL it will be
719 * called before the device is enumerated (even before its descriptor
720 * is read). This should be NULL for EHCI, which does not need this.
722 int (*alloc_device)(struct udevice *bus, struct usb_device *udev);
725 #define usb_get_ops(dev) ((struct dm_usb_ops *)(dev)->driver->ops)
726 #define usb_get_emul_ops(dev) ((struct dm_usb_ops *)(dev)->driver->ops)
728 #ifdef CONFIG_MUSB_HOST
729 int usb_reset_root_port(void);
733 * usb_get_dev_index() - look up a device index number
735 * Look up devices using their index number (starting at 0). This works since
736 * in U-Boot device addresses are allocated starting at 1 with no gaps.
738 * TODO(sjg@chromium.org): Remove this function when usb_ether.c is modified
739 * to work better with driver model.
741 * @bus: USB bus to check
742 * @index: Index number of device to find (0=first). This is just the
743 * device address less 1.
745 struct usb_device *usb_get_dev_index(struct udevice *bus, int index);
748 * usb_legacy_port_reset() - Legacy function to reset a hub port
751 * @portnr: Port number (1=first)
753 int usb_legacy_port_reset(struct usb_device *hub, int portnr);
756 * usb_setup_device() - set up a device ready for use
758 * @dev: USB device pointer. This need not be a real device - it is
759 * common for it to just be a local variable with its ->dev
760 * member (i.e. @dev->dev) set to the parent device
761 * @do_read: true to read the device descriptor before an address is set
762 * (should be false for XHCI buses, true otherwise)
763 * @parent: Parent device (either UCLASS_USB or UCLASS_USB_HUB)
764 * @portnr: Port number on hub (1=first) or 0 for none
765 * @return 0 if OK, -ve on error */
766 int usb_setup_device(struct usb_device *dev, bool do_read,
767 struct usb_device *parent, int portnr);
770 * usb_hub_scan() - Scan a hub and find its devices
772 * @hub: Hub device to scan
774 int usb_hub_scan(struct udevice *hub);
777 * usb_scan_device() - Scan a device on a bus
779 * Scan a device on a bus. It has already been detected and is ready to
780 * be enumerated. This may be either the root hub (@parent is a bus) or a
781 * normal device (@parent is a hub)
783 * @parent: Parent device
784 * @port: Hub port number (numbered from 1)
785 * @speed: USB speed to use for this device
786 * @devp: Returns pointer to device if all is well
787 * @return 0 if OK, -ve on error
789 int usb_scan_device(struct udevice *parent, int port,
790 enum usb_device_speed speed, struct udevice **devp);
793 * usb_get_bus() - Find the bus for a device
795 * Search up through parents to find the bus this device is connected to. This
796 * will be a device with uclass UCLASS_USB.
798 * @dev: Device to check
799 * @return The bus, or NULL if not found (this indicates a critical error in
802 struct udevice *usb_get_bus(struct udevice *dev);
805 * usb_select_config() - Set up a device ready for use
807 * This function assumes that the device already has an address and a driver
808 * bound, and is ready to be set up.
810 * This re-reads the device and configuration descriptors and sets the
813 * @dev: Device to set up
815 int usb_select_config(struct usb_device *dev);
818 * usb_child_pre_probe() - Pre-probe function for USB devices
820 * This is called on all children of hubs and USB controllers (i.e. UCLASS_USB
821 * and UCLASS_USB_HUB) when a new device is about to be probed. It sets up the
822 * device from the saved platform data and calls usb_select_config() to
825 * Once this is done, the device's normal driver can take over, knowing the
826 * device is accessible on the USB bus.
828 * This function is for use only by the internal USB stack.
830 * @dev: Device to set up
832 int usb_child_pre_probe(struct udevice *dev);
837 * usb_setup_ehci_gadget() - Set up a USB device as a gadget
839 * TODO(sjg@chromium.org): Tidy this up when USB gadgets can use driver model
841 * This provides a way to tell a controller to start up as a USB device
842 * instead of as a host. It is untested.
844 int usb_setup_ehci_gadget(struct ehci_ctrl **ctlrp);
847 * usb_stor_reset() - Prepare to scan USB storage devices
849 * Empty the list of USB storage devices in preparation for scanning them.
850 * This must be called before a USB scan.
852 void usb_stor_reset(void);
854 #else /* !CONFIG_DM_USB */
856 struct usb_device *usb_get_dev_index(int index);
860 bool usb_device_has_child_on_port(struct usb_device *parent, int port);
862 int usb_hub_probe(struct usb_device *dev, int ifnum);
863 void usb_hub_reset(void);
866 * legacy_hub_port_reset() - reset a port given its usb_device pointer
868 * Reset a hub port and see if a device is present on that port, providing
869 * sufficient time for it to show itself. The port status is returned.
871 * With driver model this moves to hub_port_reset() and is passed a struct
874 * @dev: USB device to reset
875 * @port: Port number to reset (note ports are numbered from 0 here)
876 * @portstat: Returns port status
878 int legacy_hub_port_reset(struct usb_device *dev, int port,
879 unsigned short *portstat);
881 int hub_port_reset(struct udevice *dev, int port, unsigned short *portstat);
884 * usb_alloc_new_device() - Allocate a new device
886 * @devp: returns a pointer of a new device structure. With driver model this
887 * is a device pointer, but with legacy USB this pointer is
889 * @return 0 if OK, -ENOSPC if we have found out of room for new devices
891 int usb_alloc_new_device(struct udevice *controller, struct usb_device **devp);
894 * usb_free_device() - Free a partially-inited device
896 * This is an internal function. It is used to reverse the action of
897 * usb_alloc_new_device() when we hit a problem during init.
899 void usb_free_device(struct udevice *controller);
901 int usb_new_device(struct usb_device *dev);
903 int usb_alloc_device(struct usb_device *dev);
906 * usb_emul_setup_device() - Set up a new USB device emulation
908 * This is normally called when a new emulation device is bound. It tells
909 * the USB emulation uclass about the features of the emulator.
911 * @dev: Emulation device
912 * @maxpacketsize: Maximum packet size (e.g. PACKET_SIZE_64)
913 * @strings: List of USB string descriptors, terminated by a NULL
915 * @desc_list: List of points or USB descriptors, terminated by NULL.
916 * The first entry must be struct usb_device_descriptor,
917 * and others follow on after that.
918 * @return 0 if OK, -ve on error
920 int usb_emul_setup_device(struct udevice *dev, int maxpacketsize,
921 struct usb_string *strings, void **desc_list);
924 * usb_emul_control() - Send a control packet to an emulator
926 * @emul: Emulator device
927 * @udev: USB device (which the emulator is causing to appear)
928 * See struct dm_usb_ops for details on other parameters
929 * @return 0 if OK, -ve on error
931 int usb_emul_control(struct udevice *emul, struct usb_device *udev,
932 unsigned long pipe, void *buffer, int length,
933 struct devrequest *setup);
936 * usb_emul_bulk() - Send a bulk packet to an emulator
938 * @emul: Emulator device
939 * @udev: USB device (which the emulator is causing to appear)
940 * See struct dm_usb_ops for details on other parameters
941 * @return 0 if OK, -ve on error
943 int usb_emul_bulk(struct udevice *emul, struct usb_device *udev,
944 unsigned long pipe, void *buffer, int length);
947 * usb_emul_find() - Find an emulator for a particular device
949 * Check @pipe to find a device number on bus @bus and return it.
951 * @bus: USB bus (controller)
952 * @pipe: Describes pipe being used, and includes the device number
953 * @emulp: Returns pointer to emulator, or NULL if not found
954 * @return 0 if found, -ve on error
956 int usb_emul_find(struct udevice *bus, ulong pipe, struct udevice **emulp);
959 * usb_emul_reset() - Reset all emulators ready for use
961 * Clear out any address information in the emulators and make then ready for
964 void usb_emul_reset(struct udevice *dev);