1 /* SPDX-License-Identifier: GPL-2.0+ */
4 * Denis Peter, MPL AG Switzerland
6 * Adapted for U-Boot driver model
7 * (C) Copyright 2015 Google, Inc
8 * Note: Part of this code has been derived from linux
16 #include <linux/usb/ch9.h>
17 #include <asm/cache.h>
21 * The EHCI spec says that we must align to at least 32 bytes. However,
22 * some platforms require larger alignment.
24 #if ARCH_DMA_MINALIGN > 32
25 #define USB_DMA_MINALIGN ARCH_DMA_MINALIGN
27 #define USB_DMA_MINALIGN 32
30 /* Everything is aribtrary */
31 #define USB_ALTSETTINGALLOC 4
32 #define USB_MAXALTSETTING 128 /* Hard limit */
34 #define USB_MAX_DEVICE 32
35 #define USB_MAXCONFIG 8
36 #define USB_MAXINTERFACES 8
37 #define USB_MAXENDPOINTS 16
38 #define USB_MAXCHILDREN 8 /* This is arbitrary */
39 #define USB_MAX_HUB 16
41 #define USB_CNTL_TIMEOUT 100 /* 100ms timeout */
44 * This is the timeout to allow for submitting an urb in ms. We allow more
45 * time for a BULK device to react - some are slow.
47 #define USB_TIMEOUT_MS(pipe) (usb_pipebulk(pipe) ? 5000 : 1000)
49 /* device request (setup) */
56 } __attribute__ ((packed));
59 struct usb_interface {
60 struct usb_interface_descriptor desc;
66 struct usb_endpoint_descriptor ep_desc[USB_MAXENDPOINTS];
68 * Super Speed Device will have Super Speed Endpoint
69 * Companion Descriptor (section 9.6.7 of usb 3.0 spec)
70 * Revision 1.0 June 6th 2011
72 struct usb_ss_ep_comp_descriptor ss_ep_comp_desc[USB_MAXENDPOINTS];
73 } __attribute__ ((packed));
75 /* Configuration information.. */
77 struct usb_config_descriptor desc;
79 __u8 no_of_if; /* number of interfaces */
80 struct usb_interface if_desc[USB_MAXINTERFACES];
81 } __attribute__ ((packed));
84 /* Maximum packet size; encoded as 0,1,2,3 = 8,16,32,64 */
92 * struct usb_device - information about a USB device
94 * With driver model both UCLASS_USB (the USB controllers) and UCLASS_USB_HUB
95 * (the hubs) have this as parent data. Hubs are children of controllers or
96 * other hubs and there is always a single root hub for each controller.
97 * Therefore struct usb_device can always be accessed with
98 * dev_get_parent_priv(dev), where dev is a USB device.
100 * Pointers exist for obtaining both the device (could be any uclass) and
101 * controller (UCLASS_USB) from this structure. The controller does not have
102 * a struct usb_device since it is not a device.
105 int devnum; /* Device number on USB bus */
106 int speed; /* full/low/high */
107 char mf[32]; /* manufacturer */
108 char prod[32]; /* product */
109 char serial[32]; /* serial number */
111 /* Maximum packet size; one of: PACKET_SIZE_* */
113 /* one bit for each endpoint ([0] = IN, [1] = OUT) */
114 unsigned int toggle[2];
115 /* endpoint halts; one bit per endpoint # & direction;
116 * [0] = IN, [1] = OUT
118 unsigned int halted[2];
119 int epmaxpacketin[16]; /* INput endpoint specific maximums */
120 int epmaxpacketout[16]; /* OUTput endpoint specific maximums */
122 int configno; /* selected config number */
123 /* Device Descriptor */
124 struct usb_device_descriptor descriptor
125 __attribute__((aligned(ARCH_DMA_MINALIGN)));
126 struct usb_config config; /* config descriptor */
128 int have_langid; /* whether string_langid is valid yet */
129 int string_langid; /* language ID for strings */
130 int (*irq_handle)(struct usb_device *dev);
131 unsigned long irq_status;
132 int irq_act_len; /* transferred bytes */
135 * Child devices - if this is a hub device
136 * Each instance needs its own set of data structures.
138 unsigned long status;
139 unsigned long int_pending; /* 1 bit per ep, used by int_queue */
140 int act_len; /* transferred bytes */
141 int maxchild; /* Number of ports if hub */
142 int portnr; /* Port number, 1=first */
143 #if !CONFIG_IS_ENABLED(DM_USB)
144 /* parent hub, or NULL if this is the root hub */
145 struct usb_device *parent;
146 struct usb_device *children[USB_MAXCHILDREN];
147 void *controller; /* hardware controller private data */
149 /* slot_id - for xHCI enabled devices */
150 unsigned int slot_id;
151 #if CONFIG_IS_ENABLED(DM_USB)
152 struct udevice *dev; /* Pointer to associated device */
153 struct udevice *controller_dev; /* Pointer to associated controller */
160 * You can initialize platform's USB host or device
161 * ports by passing this enum as an argument to
169 /**********************************************************************
170 * this is how the lowlevel part communicate with the outer world
173 int usb_lowlevel_init(int index, enum usb_init_type init, void **controller);
174 int usb_lowlevel_stop(int index);
176 #if defined(CONFIG_USB_MUSB_HOST) || CONFIG_IS_ENABLED(DM_USB)
177 int usb_reset_root_port(struct usb_device *dev);
179 #define usb_reset_root_port(dev)
182 int submit_bulk_msg(struct usb_device *dev, unsigned long pipe,
183 void *buffer, int transfer_len);
184 int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
185 int transfer_len, struct devrequest *setup);
186 int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
187 int transfer_len, int interval);
189 #if defined CONFIG_USB_EHCI_HCD || defined CONFIG_USB_MUSB_HOST \
190 || CONFIG_IS_ENABLED(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 int usb_stor_scan(int mode);
232 int usb_stor_info(void);
236 #ifdef CONFIG_USB_HOST_ETHER
238 #define USB_MAX_ETH_DEV 5
239 int usb_host_eth_scan(int mode);
243 #ifdef CONFIG_USB_KEYBOARD
245 int drv_usb_kbd_init(void);
246 int usb_kbd_deregister(int force);
250 int usb_init(void); /* initialize the USB Controller */
251 int usb_stop(void); /* stop the USB Controller */
252 int usb_detect_change(void); /* detect if a USB device has been (un)plugged */
255 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol);
256 int usb_set_idle(struct usb_device *dev, int ifnum, int duration,
258 int usb_control_msg(struct usb_device *dev, unsigned int pipe,
259 unsigned char request, unsigned char requesttype,
260 unsigned short value, unsigned short index,
261 void *data, unsigned short size, int timeout);
262 int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
263 void *data, int len, int *actual_length, int timeout);
264 int usb_int_msg(struct usb_device *dev, unsigned long pipe,
265 void *buffer, int transfer_len, int interval);
266 int usb_disable_asynch(int disable);
267 int usb_maxpacket(struct usb_device *dev, unsigned long pipe);
268 int usb_get_configuration_no(struct usb_device *dev, int cfgno,
269 unsigned char *buffer, int length);
270 int usb_get_configuration_len(struct usb_device *dev, int cfgno);
271 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type,
272 unsigned char id, void *buf, int size);
273 int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
274 unsigned char type, unsigned char id, void *buf,
276 int usb_clear_halt(struct usb_device *dev, int pipe);
277 int usb_string(struct usb_device *dev, int index, char *buf, size_t size);
278 int usb_set_interface(struct usb_device *dev, int interface, int alternate);
279 int usb_get_port_status(struct usb_device *dev, int port, void *data);
281 /* big endian -> little endian conversion */
282 /* some CPUs are already little endian e.g. the ARM920T */
283 #define __swap_16(x) \
284 ({ unsigned short x_ = (unsigned short)x; \
286 ((x_ & 0x00FFU) << 8) | ((x_ & 0xFF00U) >> 8)); \
288 #define __swap_32(x) \
289 ({ unsigned long x_ = (unsigned long)x; \
291 ((x_ & 0x000000FFUL) << 24) | \
292 ((x_ & 0x0000FF00UL) << 8) | \
293 ((x_ & 0x00FF0000UL) >> 8) | \
294 ((x_ & 0xFF000000UL) >> 24)); \
297 #ifdef __LITTLE_ENDIAN
298 # define swap_16(x) (x)
299 # define swap_32(x) (x)
301 # define swap_16(x) __swap_16(x)
302 # define swap_32(x) __swap_32(x)
306 * Calling this entity a "pipe" is glorifying it. A USB pipe
307 * is something embarrassingly simple: it basically consists
308 * of the following information:
309 * - device number (7 bits)
310 * - endpoint number (4 bits)
311 * - current Data0/1 state (1 bit)
312 * - direction (1 bit)
314 * - max packet size (2 bits: 8, 16, 32 or 64)
315 * - pipe type (2 bits: control, interrupt, bulk, isochronous)
317 * That's 18 bits. Really. Nothing more. And the USB people have
318 * documented these eighteen bits as some kind of glorious
319 * virtual data structure.
321 * Let's not fall in that trap. We'll just encode it as a simple
322 * unsigned int. The encoding is:
324 * - max size: bits 0-1 (00 = 8, 01 = 16, 10 = 32, 11 = 64)
325 * - direction: bit 7 (0 = Host-to-Device [Out],
326 * (1 = Device-to-Host [In])
327 * - device: bits 8-14
328 * - endpoint: bits 15-18
330 * - pipe type: bits 30-31 (00 = isochronous, 01 = interrupt,
331 * 10 = control, 11 = bulk)
333 * Why? Because it's arbitrary, and whatever encoding we select is really
334 * up to us. This one happens to share a lot of bit positions with the UHCI
335 * specification, so that much of the uhci driver can just mask the bits
338 /* Create various pipes... */
339 #define create_pipe(dev,endpoint) \
340 (((dev)->devnum << 8) | ((endpoint) << 15) | \
341 (dev)->maxpacketsize)
342 #define default_pipe(dev) ((dev)->speed << 26)
344 #define usb_sndctrlpipe(dev, endpoint) ((PIPE_CONTROL << 30) | \
345 create_pipe(dev, endpoint))
346 #define usb_rcvctrlpipe(dev, endpoint) ((PIPE_CONTROL << 30) | \
347 create_pipe(dev, endpoint) | \
349 #define usb_sndisocpipe(dev, endpoint) ((PIPE_ISOCHRONOUS << 30) | \
350 create_pipe(dev, endpoint))
351 #define usb_rcvisocpipe(dev, endpoint) ((PIPE_ISOCHRONOUS << 30) | \
352 create_pipe(dev, endpoint) | \
354 #define usb_sndbulkpipe(dev, endpoint) ((PIPE_BULK << 30) | \
355 create_pipe(dev, endpoint))
356 #define usb_rcvbulkpipe(dev, endpoint) ((PIPE_BULK << 30) | \
357 create_pipe(dev, endpoint) | \
359 #define usb_sndintpipe(dev, endpoint) ((PIPE_INTERRUPT << 30) | \
360 create_pipe(dev, endpoint))
361 #define usb_rcvintpipe(dev, endpoint) ((PIPE_INTERRUPT << 30) | \
362 create_pipe(dev, endpoint) | \
364 #define usb_snddefctrl(dev) ((PIPE_CONTROL << 30) | \
366 #define usb_rcvdefctrl(dev) ((PIPE_CONTROL << 30) | \
367 default_pipe(dev) | \
370 /* The D0/D1 toggle bits */
371 #define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> ep) & 1)
372 #define usb_dotoggle(dev, ep, out) ((dev)->toggle[out] ^= (1 << ep))
373 #define usb_settoggle(dev, ep, out, bit) ((dev)->toggle[out] = \
374 ((dev)->toggle[out] & \
375 ~(1 << ep)) | ((bit) << ep))
377 /* Endpoint halt control/status */
378 #define usb_endpoint_out(ep_dir) (((ep_dir >> 7) & 1) ^ 1)
379 #define usb_endpoint_halt(dev, ep, out) ((dev)->halted[out] |= (1 << (ep)))
380 #define usb_endpoint_running(dev, ep, out) ((dev)->halted[out] &= ~(1 << (ep)))
381 #define usb_endpoint_halted(dev, ep, out) ((dev)->halted[out] & (1 << (ep)))
383 #define usb_packetid(pipe) (((pipe) & USB_DIR_IN) ? USB_PID_IN : \
386 #define usb_pipeout(pipe) ((((pipe) >> 7) & 1) ^ 1)
387 #define usb_pipein(pipe) (((pipe) >> 7) & 1)
388 #define usb_pipedevice(pipe) (((pipe) >> 8) & 0x7f)
389 #define usb_pipe_endpdev(pipe) (((pipe) >> 8) & 0x7ff)
390 #define usb_pipeendpoint(pipe) (((pipe) >> 15) & 0xf)
391 #define usb_pipedata(pipe) (((pipe) >> 19) & 1)
392 #define usb_pipetype(pipe) (((pipe) >> 30) & 3)
393 #define usb_pipeisoc(pipe) (usb_pipetype((pipe)) == PIPE_ISOCHRONOUS)
394 #define usb_pipeint(pipe) (usb_pipetype((pipe)) == PIPE_INTERRUPT)
395 #define usb_pipecontrol(pipe) (usb_pipetype((pipe)) == PIPE_CONTROL)
396 #define usb_pipebulk(pipe) (usb_pipetype((pipe)) == PIPE_BULK)
398 #define usb_pipe_ep_index(pipe) \
399 usb_pipecontrol(pipe) ? (usb_pipeendpoint(pipe) * 2) : \
400 ((usb_pipeendpoint(pipe) * 2) - \
401 (usb_pipein(pipe) ? 0 : 1))
404 * struct usb_device_id - identifies USB devices for probing and hotplugging
405 * @match_flags: Bit mask controlling which of the other fields are used to
406 * match against new devices. Any field except for driver_info may be
407 * used, although some only make sense in conjunction with other fields.
408 * This is usually set by a USB_DEVICE_*() macro, which sets all
409 * other fields in this structure except for driver_info.
410 * @idVendor: USB vendor ID for a device; numbers are assigned
411 * by the USB forum to its members.
412 * @idProduct: Vendor-assigned product ID.
413 * @bcdDevice_lo: Low end of range of vendor-assigned product version numbers.
414 * This is also used to identify individual product versions, for
415 * a range consisting of a single device.
416 * @bcdDevice_hi: High end of version number range. The range of product
417 * versions is inclusive.
418 * @bDeviceClass: Class of device; numbers are assigned
419 * by the USB forum. Products may choose to implement classes,
420 * or be vendor-specific. Device classes specify behavior of all
421 * the interfaces on a device.
422 * @bDeviceSubClass: Subclass of device; associated with bDeviceClass.
423 * @bDeviceProtocol: Protocol of device; associated with bDeviceClass.
424 * @bInterfaceClass: Class of interface; numbers are assigned
425 * by the USB forum. Products may choose to implement classes,
426 * or be vendor-specific. Interface classes specify behavior only
427 * of a given interface; other interfaces may support other classes.
428 * @bInterfaceSubClass: Subclass of interface; associated with bInterfaceClass.
429 * @bInterfaceProtocol: Protocol of interface; associated with bInterfaceClass.
430 * @bInterfaceNumber: Number of interface; composite devices may use
431 * fixed interface numbers to differentiate between vendor-specific
433 * @driver_info: Holds information used by the driver. Usually it holds
434 * a pointer to a descriptor understood by the driver, or perhaps
437 * In most cases, drivers will create a table of device IDs by using
438 * USB_DEVICE(), or similar macros designed for that purpose.
439 * They will then export it to userspace using MODULE_DEVICE_TABLE(),
440 * and provide it to the USB core through their usb_driver structure.
442 * See the usb_match_id() function for information about how matches are
443 * performed. Briefly, you will normally use one of several macros to help
444 * construct these entries. Each entry you provide will either identify
445 * one or more specific products, or will identify a class of products
446 * which have agreed to behave the same. You should put the more specific
447 * matches towards the beginning of your table, so that driver_info can
448 * record quirks of specific products.
450 struct usb_device_id {
451 /* which fields to match against? */
454 /* Used for product specific matches; range is inclusive */
460 /* Used for device class matches */
465 /* Used for interface class matches */
467 u8 bInterfaceSubClass;
468 u8 bInterfaceProtocol;
470 /* Used for vendor-specific interface matches */
473 /* not matched against */
477 /* Some useful macros to use to create struct usb_device_id */
478 #define USB_DEVICE_ID_MATCH_VENDOR 0x0001
479 #define USB_DEVICE_ID_MATCH_PRODUCT 0x0002
480 #define USB_DEVICE_ID_MATCH_DEV_LO 0x0004
481 #define USB_DEVICE_ID_MATCH_DEV_HI 0x0008
482 #define USB_DEVICE_ID_MATCH_DEV_CLASS 0x0010
483 #define USB_DEVICE_ID_MATCH_DEV_SUBCLASS 0x0020
484 #define USB_DEVICE_ID_MATCH_DEV_PROTOCOL 0x0040
485 #define USB_DEVICE_ID_MATCH_INT_CLASS 0x0080
486 #define USB_DEVICE_ID_MATCH_INT_SUBCLASS 0x0100
487 #define USB_DEVICE_ID_MATCH_INT_PROTOCOL 0x0200
488 #define USB_DEVICE_ID_MATCH_INT_NUMBER 0x0400
490 /* Match anything, indicates this is a valid entry even if everything is 0 */
491 #define USB_DEVICE_ID_MATCH_NONE 0x0800
492 #define USB_DEVICE_ID_MATCH_ALL 0x07ff
495 * struct usb_driver_entry - Matches a driver to its usb_device_ids
496 * @driver: Driver to use
497 * @match: List of match records for this driver, terminated by {}
499 struct usb_driver_entry {
500 struct driver *driver;
501 const struct usb_device_id *match;
504 #define USB_DEVICE_ID_MATCH_DEVICE \
505 (USB_DEVICE_ID_MATCH_VENDOR | USB_DEVICE_ID_MATCH_PRODUCT)
508 * USB_DEVICE - macro used to describe a specific usb device
509 * @vend: the 16 bit USB Vendor ID
510 * @prod: the 16 bit USB Product ID
512 * This macro is used to create a struct usb_device_id that matches a
515 #define USB_DEVICE(vend, prod) \
516 .match_flags = USB_DEVICE_ID_MATCH_DEVICE, \
517 .idVendor = (vend), \
520 #define U_BOOT_USB_DEVICE(__name, __match) \
521 ll_entry_declare(struct usb_driver_entry, __name, usb_driver_entry) = {\
522 .driver = llsym(struct driver, __name, driver), \
526 /*************************************************************************
529 struct usb_port_status {
530 unsigned short wPortStatus;
531 unsigned short wPortChange;
532 } __attribute__ ((packed));
534 struct usb_hub_status {
535 unsigned short wHubStatus;
536 unsigned short wHubChange;
537 } __attribute__ ((packed));
540 * Hub Device descriptor
541 * USB Hub class device protocols
543 #define USB_HUB_PR_FS 0 /* Full speed hub */
544 #define USB_HUB_PR_HS_NO_TT 0 /* Hi-speed hub without TT */
545 #define USB_HUB_PR_HS_SINGLE_TT 1 /* Hi-speed hub with single TT */
546 #define USB_HUB_PR_HS_MULTI_TT 2 /* Hi-speed hub with multiple TT */
547 #define USB_HUB_PR_SS 3 /* Super speed hub */
549 /* Transaction Translator Think Times, in bits */
550 #define HUB_TTTT_8_BITS 0x00
551 #define HUB_TTTT_16_BITS 0x20
552 #define HUB_TTTT_24_BITS 0x40
553 #define HUB_TTTT_32_BITS 0x60
556 struct usb_hub_descriptor {
557 unsigned char bLength;
558 unsigned char bDescriptorType;
559 unsigned char bNbrPorts;
560 unsigned short wHubCharacteristics;
561 unsigned char bPwrOn2PwrGood;
562 unsigned char bHubContrCurrent;
563 /* 2.0 and 3.0 hubs differ here */
566 /* add 1 bit for hub status change; round to bytes */
567 __u8 DeviceRemovable[(USB_MAXCHILDREN + 1 + 7) / 8];
568 __u8 PortPowerCtrlMask[(USB_MAXCHILDREN + 1 + 7) / 8];
569 } __attribute__ ((packed)) hs;
574 __le16 DeviceRemovable;
575 } __attribute__ ((packed)) ss;
577 } __attribute__ ((packed));
580 struct usb_hub_device {
581 struct usb_device *pusb_dev;
582 struct usb_hub_descriptor desc;
584 ulong connect_timeout; /* Device connection timeout in ms */
585 ulong query_delay; /* Device query delay in ms */
586 int overcurrent_count[USB_MAXCHILDREN]; /* Over-current counter */
587 int hub_depth; /* USB 3.0 hub depth */
588 struct usb_tt tt; /* Transaction Translator */
591 #if CONFIG_IS_ENABLED(DM_USB)
593 * struct usb_platdata - Platform data about a USB controller
595 * Given a USB controller (UCLASS_USB) dev this is dev_get_platdata(dev)
597 struct usb_platdata {
598 enum usb_init_type init_type;
602 * struct usb_dev_platdata - Platform data about a USB device
604 * Given a USB device dev this structure is dev_get_parent_platdata(dev).
605 * This is used by sandbox to provide emulation data also.
607 * @id: ID used to match this device
608 * @devnum: Device address on the USB bus
609 * @udev: usb-uclass internal use only do NOT use
610 * @strings: List of descriptor strings (for sandbox emulation purposes)
611 * @desc_list: List of descriptors (for sandbox emulation purposes)
613 struct usb_dev_platdata {
614 struct usb_device_id id;
617 * This pointer is used to pass the usb_device used in usb_scan_device,
618 * to get the usb descriptors before the driver is known, to the
619 * actual udevice once the driver is known and the udevice is created.
620 * This will be NULL except during probe, do NOT use.
622 * This should eventually go away.
624 struct usb_device *udev;
625 #ifdef CONFIG_SANDBOX
626 struct usb_string *strings;
627 /* NULL-terminated list of descriptor pointers */
628 struct usb_generic_descriptor **desc_list;
634 * struct usb_bus_priv - information about the USB controller
636 * Given a USB controller (UCLASS_USB) 'dev', this is
637 * dev_get_uclass_priv(dev).
639 * @next_addr: Next device address to allocate minus 1. Incremented by 1
640 * each time a new device address is set, so this holds the
641 * number of devices on the bus
642 * @desc_before_addr: true if we can read a device descriptor before it
643 * has been assigned an address. For XHCI this is not possible
644 * so this will be false.
645 * @companion: True if this is a companion controller to another USB
648 struct usb_bus_priv {
650 bool desc_before_addr;
655 * struct usb_emul_platdata - platform data about the USB emulator
657 * Given a USB emulator (UCLASS_USB_EMUL) 'dev', this is
658 * dev_get_uclass_platdata(dev).
660 * @port1: USB emulator device port number on the parent hub
662 struct usb_emul_platdata {
663 int port1; /* Port number (numbered from 1) */
667 * struct dm_usb_ops - USB controller operations
669 * This defines the operations supoorted on a USB controller. Common
672 * @bus: USB bus (i.e. controller), which is in UCLASS_USB.
673 * @udev: USB device parent data. Controllers are not expected to need
674 * this, since the device address on the bus is encoded in @pipe.
675 * It is used for sandbox, and can be handy for debugging and
677 * @pipe: An assortment of bitfields which provide address and packet
678 * type information. See create_pipe() above for encoding
680 * @buffer: A buffer to use for sending/receiving. This should be
682 * @length: Buffer length in bytes
686 * control() - Send a control message
688 * Most parameters are as above.
690 * @setup: Additional setup information required by the message
692 int (*control)(struct udevice *bus, struct usb_device *udev,
693 unsigned long pipe, void *buffer, int length,
694 struct devrequest *setup);
696 * bulk() - Send a bulk message
698 * Parameters are as above.
700 int (*bulk)(struct udevice *bus, struct usb_device *udev,
701 unsigned long pipe, void *buffer, int length);
703 * interrupt() - Send an interrupt message
705 * Most parameters are as above.
707 * @interval: Interrupt interval
709 int (*interrupt)(struct udevice *bus, struct usb_device *udev,
710 unsigned long pipe, void *buffer, int length,
714 * create_int_queue() - Create and queue interrupt packets
716 * Create and queue @queuesize number of interrupt usb packets of
717 * @elementsize bytes each. @buffer must be atleast @queuesize *
718 * @elementsize bytes.
720 * Note some controllers only support a queuesize of 1.
722 * @interval: Interrupt interval
724 * @return A pointer to the created interrupt queue or NULL on error
726 struct int_queue * (*create_int_queue)(struct udevice *bus,
727 struct usb_device *udev, unsigned long pipe,
728 int queuesize, int elementsize, void *buffer,
732 * poll_int_queue() - Poll an interrupt queue for completed packets
734 * Poll an interrupt queue for completed packets. The return value
735 * points to the part of the buffer passed to create_int_queue()
736 * corresponding to the completed packet.
738 * @queue: queue to poll
740 * @return Pointer to the data of the first completed packet, or
741 * NULL if no packets are ready
743 void * (*poll_int_queue)(struct udevice *bus, struct usb_device *udev,
744 struct int_queue *queue);
747 * destroy_int_queue() - Destroy an interrupt queue
749 * Destroy an interrupt queue created by create_int_queue().
751 * @queue: queue to poll
753 * @return 0 if OK, -ve on error
755 int (*destroy_int_queue)(struct udevice *bus, struct usb_device *udev,
756 struct int_queue *queue);
759 * alloc_device() - Allocate a new device context (XHCI)
761 * Before sending packets to a new device on an XHCI bus, a device
762 * context must be created. If this method is not NULL it will be
763 * called before the device is enumerated (even before its descriptor
764 * is read). This should be NULL for EHCI, which does not need this.
766 int (*alloc_device)(struct udevice *bus, struct usb_device *udev);
769 * reset_root_port() - Reset usb root port
771 int (*reset_root_port)(struct udevice *bus, struct usb_device *udev);
774 * update_hub_device() - Update HCD's internal representation of hub
776 * After a hub descriptor is fetched, notify HCD so that its internal
777 * representation of this hub can be updated (xHCI)
779 int (*update_hub_device)(struct udevice *bus, struct usb_device *udev);
782 * get_max_xfer_size() - Get HCD's maximum transfer bytes
784 * The HCD may have limitation on the maximum bytes to be transferred
785 * in a USB transfer. USB class driver needs to be aware of this.
787 int (*get_max_xfer_size)(struct udevice *bus, size_t *size);
790 #define usb_get_ops(dev) ((struct dm_usb_ops *)(dev)->driver->ops)
791 #define usb_get_emul_ops(dev) ((struct dm_usb_ops *)(dev)->driver->ops)
794 * usb_get_dev_index() - look up a device index number
796 * Look up devices using their index number (starting at 0). This works since
797 * in U-Boot device addresses are allocated starting at 1 with no gaps.
799 * TODO(sjg@chromium.org): Remove this function when usb_ether.c is modified
800 * to work better with driver model.
802 * @bus: USB bus to check
803 * @index: Index number of device to find (0=first). This is just the
804 * device address less 1.
806 struct usb_device *usb_get_dev_index(struct udevice *bus, int index);
809 * usb_setup_device() - set up a device ready for use
811 * @dev: USB device pointer. This need not be a real device - it is
812 * common for it to just be a local variable with its ->dev
813 * member (i.e. @dev->dev) set to the parent device and
814 * dev->portnr set to the port number on the hub (1=first)
815 * @do_read: true to read the device descriptor before an address is set
816 * (should be false for XHCI buses, true otherwise)
817 * @parent: Parent device (either UCLASS_USB or UCLASS_USB_HUB)
818 * @return 0 if OK, -ve on error */
819 int usb_setup_device(struct usb_device *dev, bool do_read,
820 struct usb_device *parent);
823 * usb_hub_is_root_hub() - Test whether a hub device is root hub or not
825 * @hub: USB hub device to test
826 * @return: true if the hub device is root hub, false otherwise.
828 bool usb_hub_is_root_hub(struct udevice *hub);
831 * usb_hub_scan() - Scan a hub and find its devices
833 * @hub: Hub device to scan
835 int usb_hub_scan(struct udevice *hub);
838 * usb_scan_device() - Scan a device on a bus
840 * Scan a device on a bus. It has already been detected and is ready to
841 * be enumerated. This may be either the root hub (@parent is a bus) or a
842 * normal device (@parent is a hub)
844 * @parent: Parent device
845 * @port: Hub port number (numbered from 1)
846 * @speed: USB speed to use for this device
847 * @devp: Returns pointer to device if all is well
848 * @return 0 if OK, -ve on error
850 int usb_scan_device(struct udevice *parent, int port,
851 enum usb_device_speed speed, struct udevice **devp);
854 * usb_get_bus() - Find the bus for a device
856 * Search up through parents to find the bus this device is connected to. This
857 * will be a device with uclass UCLASS_USB.
859 * @dev: Device to check
860 * @return The bus, or NULL if not found (this indicates a critical error in
863 struct udevice *usb_get_bus(struct udevice *dev);
866 * usb_select_config() - Set up a device ready for use
868 * This function assumes that the device already has an address and a driver
869 * bound, and is ready to be set up.
871 * This re-reads the device and configuration descriptors and sets the
874 * @dev: Device to set up
876 int usb_select_config(struct usb_device *dev);
879 * usb_child_pre_probe() - Pre-probe function for USB devices
881 * This is called on all children of hubs and USB controllers (i.e. UCLASS_USB
882 * and UCLASS_USB_HUB) when a new device is about to be probed. It sets up the
883 * device from the saved platform data and calls usb_select_config() to
886 * Once this is done, the device's normal driver can take over, knowing the
887 * device is accessible on the USB bus.
889 * This function is for use only by the internal USB stack.
891 * @dev: Device to set up
893 int usb_child_pre_probe(struct udevice *dev);
898 * usb_setup_ehci_gadget() - Set up a USB device as a gadget
900 * TODO(sjg@chromium.org): Tidy this up when USB gadgets can use driver model
902 * This provides a way to tell a controller to start up as a USB device
903 * instead of as a host. It is untested.
905 int usb_setup_ehci_gadget(struct ehci_ctrl **ctlrp);
908 * usb_stor_reset() - Prepare to scan USB storage devices
910 * Empty the list of USB storage devices in preparation for scanning them.
911 * This must be called before a USB scan.
913 void usb_stor_reset(void);
915 #else /* !CONFIG_IS_ENABLED(DM_USB) */
917 struct usb_device *usb_get_dev_index(int index);
921 bool usb_device_has_child_on_port(struct usb_device *parent, int port);
923 int usb_hub_probe(struct usb_device *dev, int ifnum);
924 void usb_hub_reset(void);
927 * usb_find_usb2_hub_address_port() - Get hub address and port for TT setting
929 * Searches for the first HS hub above the given device. If a
930 * HS hub is found, the hub address and the port the device is
931 * connected to is return, as required for SPLIT transactions
933 * @param: udev full speed or low speed device
935 void usb_find_usb2_hub_address_port(struct usb_device *udev,
936 uint8_t *hub_address, uint8_t *hub_port);
939 * usb_alloc_new_device() - Allocate a new device
941 * @devp: returns a pointer of a new device structure. With driver model this
942 * is a device pointer, but with legacy USB this pointer is
944 * @return 0 if OK, -ENOSPC if we have found out of room for new devices
946 int usb_alloc_new_device(struct udevice *controller, struct usb_device **devp);
949 * usb_free_device() - Free a partially-inited device
951 * This is an internal function. It is used to reverse the action of
952 * usb_alloc_new_device() when we hit a problem during init.
954 void usb_free_device(struct udevice *controller);
956 int usb_new_device(struct usb_device *dev);
958 int usb_alloc_device(struct usb_device *dev);
961 * usb_update_hub_device() - Update HCD's internal representation of hub
963 * After a hub descriptor is fetched, notify HCD so that its internal
964 * representation of this hub can be updated.
967 * @return 0 if OK, -ve on error
969 int usb_update_hub_device(struct usb_device *dev);
972 * usb_get_max_xfer_size() - Get HCD's maximum transfer bytes
974 * The HCD may have limitation on the maximum bytes to be transferred
975 * in a USB transfer. USB class driver needs to be aware of this.
978 * @size: maximum transfer bytes
979 * @return 0 if OK, -ve on error
981 int usb_get_max_xfer_size(struct usb_device *dev, size_t *size);
984 * usb_emul_setup_device() - Set up a new USB device emulation
986 * This is normally called when a new emulation device is bound. It tells
987 * the USB emulation uclass about the features of the emulator.
989 * @dev: Emulation device
990 * @strings: List of USB string descriptors, terminated by a NULL
992 * @desc_list: List of points or USB descriptors, terminated by NULL.
993 * The first entry must be struct usb_device_descriptor,
994 * and others follow on after that.
995 * @return 0 if OK, -ENOSYS if not implemented, other -ve on error
997 int usb_emul_setup_device(struct udevice *dev, struct usb_string *strings,
1001 * usb_emul_control() - Send a control packet to an emulator
1003 * @emul: Emulator device
1004 * @udev: USB device (which the emulator is causing to appear)
1005 * See struct dm_usb_ops for details on other parameters
1006 * @return 0 if OK, -ve on error
1008 int usb_emul_control(struct udevice *emul, struct usb_device *udev,
1009 unsigned long pipe, void *buffer, int length,
1010 struct devrequest *setup);
1013 * usb_emul_bulk() - Send a bulk packet to an emulator
1015 * @emul: Emulator device
1016 * @udev: USB device (which the emulator is causing to appear)
1017 * See struct dm_usb_ops for details on other parameters
1018 * @return 0 if OK, -ve on error
1020 int usb_emul_bulk(struct udevice *emul, struct usb_device *udev,
1021 unsigned long pipe, void *buffer, int length);
1024 * usb_emul_int() - Send an interrupt packet to an emulator
1026 * @emul: Emulator device
1027 * @udev: USB device (which the emulator is causing to appear)
1028 * See struct dm_usb_ops for details on other parameters
1029 * @return 0 if OK, -ve on error
1031 int usb_emul_int(struct udevice *emul, struct usb_device *udev,
1032 unsigned long pipe, void *buffer, int length, int interval);
1035 * usb_emul_find() - Find an emulator for a particular device
1037 * Check @pipe and @port1 to find a device number on bus @bus and return it.
1039 * @bus: USB bus (controller)
1040 * @pipe: Describes pipe being used, and includes the device number
1041 * @port1: Describes port number on the parent hub
1042 * @emulp: Returns pointer to emulator, or NULL if not found
1043 * @return 0 if found, -ve on error
1045 int usb_emul_find(struct udevice *bus, ulong pipe, int port1,
1046 struct udevice **emulp);
1049 * usb_emul_find_for_dev() - Find an emulator for a particular device
1051 * @dev: USB device to check
1052 * @emulp: Returns pointer to emulator, or NULL if not found
1053 * @return 0 if found, -ve on error
1055 int usb_emul_find_for_dev(struct udevice *dev, struct udevice **emulp);
1058 * usb_emul_find_descriptor() - Find a USB descriptor of a particular device
1060 * @ptr: a pointer to a list of USB descriptor pointers
1061 * @type: type of USB descriptor to find
1062 * @index: if @type is USB_DT_CONFIG, this is the configuration value
1063 * @return a pointer to the USB descriptor found, NULL if not found
1065 struct usb_generic_descriptor **usb_emul_find_descriptor(
1066 struct usb_generic_descriptor **ptr, int type, int index);
1069 * usb_show_tree() - show the USB device tree
1071 * This shows a list of active USB devices along with basic information about
1074 void usb_show_tree(void);