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
17 #include <linux/usb/ch9.h>
18 #include <asm/cache.h>
21 extern bool usb_started; /* flag for the started/stopped USB status */
24 * The EHCI spec says that we must align to at least 32 bytes. However,
25 * some platforms require larger alignment.
27 #if ARCH_DMA_MINALIGN > 32
28 #define USB_DMA_MINALIGN ARCH_DMA_MINALIGN
30 #define USB_DMA_MINALIGN 32
33 /* Everything is aribtrary */
34 #define USB_ALTSETTINGALLOC 4
35 #define USB_MAXALTSETTING 128 /* Hard limit */
37 #define USB_MAX_DEVICE 32
38 #define USB_MAXCONFIG 8
39 #define USB_MAXINTERFACES 8
40 #define USB_MAXENDPOINTS 16
41 #define USB_MAXCHILDREN 8 /* This is arbitrary */
42 #define USB_MAX_HUB 16
44 #define USB_CNTL_TIMEOUT 100 /* 100ms timeout */
47 * This is the timeout to allow for submitting an urb in ms. We allow more
48 * time for a BULK device to react - some are slow.
50 #define USB_TIMEOUT_MS(pipe) (usb_pipebulk(pipe) ? 5000 : 1000)
52 /* device request (setup) */
59 } __attribute__ ((packed));
62 struct usb_interface {
63 struct usb_interface_descriptor desc;
69 struct usb_endpoint_descriptor ep_desc[USB_MAXENDPOINTS];
71 * Super Speed Device will have Super Speed Endpoint
72 * Companion Descriptor (section 9.6.7 of usb 3.0 spec)
73 * Revision 1.0 June 6th 2011
75 struct usb_ss_ep_comp_descriptor ss_ep_comp_desc[USB_MAXENDPOINTS];
76 } __attribute__ ((packed));
78 /* Configuration information.. */
80 struct usb_config_descriptor desc;
82 __u8 no_of_if; /* number of interfaces */
83 struct usb_interface if_desc[USB_MAXINTERFACES];
84 } __attribute__ ((packed));
87 /* Maximum packet size; encoded as 0,1,2,3 = 8,16,32,64 */
95 * struct usb_device - information about a USB device
97 * With driver model both UCLASS_USB (the USB controllers) and UCLASS_USB_HUB
98 * (the hubs) have this as parent data. Hubs are children of controllers or
99 * other hubs and there is always a single root hub for each controller.
100 * Therefore struct usb_device can always be accessed with
101 * dev_get_parent_priv(dev), where dev is a USB device.
103 * Pointers exist for obtaining both the device (could be any uclass) and
104 * controller (UCLASS_USB) from this structure. The controller does not have
105 * a struct usb_device since it is not a device.
108 int devnum; /* Device number on USB bus */
109 enum usb_device_speed speed; /* full/low/high */
110 char mf[32]; /* manufacturer */
111 char prod[32]; /* product */
112 char serial[32]; /* serial number */
114 /* Maximum packet size; one of: PACKET_SIZE_* */
116 /* one bit for each endpoint ([0] = IN, [1] = OUT) */
117 unsigned int toggle[2];
118 /* endpoint halts; one bit per endpoint # & direction;
119 * [0] = IN, [1] = OUT
121 unsigned int halted[2];
122 int epmaxpacketin[16]; /* INput endpoint specific maximums */
123 int epmaxpacketout[16]; /* OUTput endpoint specific maximums */
125 int configno; /* selected config number */
126 /* Device Descriptor */
127 struct usb_device_descriptor descriptor
128 __attribute__((aligned(ARCH_DMA_MINALIGN)));
129 struct usb_config config; /* config descriptor */
131 int have_langid; /* whether string_langid is valid yet */
132 int string_langid; /* language ID for strings */
133 int (*irq_handle)(struct usb_device *dev);
134 unsigned long irq_status;
135 int irq_act_len; /* transferred bytes */
138 * Child devices - if this is a hub device
139 * Each instance needs its own set of data structures.
141 unsigned long status;
142 unsigned long int_pending; /* 1 bit per ep, used by int_queue */
143 int act_len; /* transferred bytes */
144 int maxchild; /* Number of ports if hub */
145 int portnr; /* Port number, 1=first */
146 #if !CONFIG_IS_ENABLED(DM_USB)
147 /* parent hub, or NULL if this is the root hub */
148 struct usb_device *parent;
149 struct usb_device *children[USB_MAXCHILDREN];
150 void *controller; /* hardware controller private data */
152 /* slot_id - for xHCI enabled devices */
153 unsigned int slot_id;
154 #if CONFIG_IS_ENABLED(DM_USB)
155 struct udevice *dev; /* Pointer to associated device */
156 struct udevice *controller_dev; /* Pointer to associated controller */
163 * You can initialize platform's USB host or device
164 * ports by passing this enum as an argument to
173 /**********************************************************************
174 * this is how the lowlevel part communicate with the outer world
177 int usb_lowlevel_init(int index, enum usb_init_type init, void **controller);
178 int usb_lowlevel_stop(int index);
180 #if defined(CONFIG_USB_MUSB_HOST) || CONFIG_IS_ENABLED(DM_USB)
181 int usb_reset_root_port(struct usb_device *dev);
183 #define usb_reset_root_port(dev)
186 int submit_bulk_msg(struct usb_device *dev, unsigned long pipe,
187 void *buffer, int transfer_len);
188 int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
189 int transfer_len, struct devrequest *setup);
190 int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
191 int transfer_len, int interval, bool nonblock);
193 #if defined CONFIG_USB_EHCI_HCD || defined CONFIG_USB_MUSB_HOST \
194 || CONFIG_IS_ENABLED(DM_USB)
195 struct int_queue *create_int_queue(struct usb_device *dev, unsigned long pipe,
196 int queuesize, int elementsize, void *buffer, int interval);
197 int destroy_int_queue(struct usb_device *dev, struct int_queue *queue);
198 void *poll_int_queue(struct usb_device *dev, struct int_queue *queue);
202 #define USB_UHCI_VEND_ID 0x8086
203 #define USB_UHCI_DEV_ID 0x7112
206 * PXA25x can only act as USB device. There are drivers
207 * which works with USB CDC gadgets implementations.
208 * Some of them have common routines which can be used
209 * in boards init functions e.g. udc_disconnect() used for
210 * forced device disconnection from host.
212 extern void udc_disconnect(void);
215 * board-specific hardware initialization, called by
216 * usb drivers and u-boot commands
218 * @param index USB controller number
219 * @param init initializes controller as USB host or device
221 int board_usb_init(int index, enum usb_init_type init);
224 * can be used to clean up after failed USB initialization attempt
225 * vide: board_usb_init()
227 * @param index USB controller number for selective cleanup
228 * @param init usb_init_type passed to board_usb_init()
230 int board_usb_cleanup(int index, enum usb_init_type init);
232 #ifdef CONFIG_USB_STORAGE
234 #define USB_MAX_STOR_DEV 7
235 int usb_stor_scan(int mode);
236 int usb_stor_info(void);
240 #ifdef CONFIG_USB_HOST_ETHER
242 #define USB_MAX_ETH_DEV 5
243 int usb_host_eth_scan(int mode);
247 #ifdef CONFIG_USB_KEYBOARD
250 * USB Keyboard reports are 8 bytes in boot protocol.
251 * Appendix B of HID Device Class Definition 1.11
253 #define USB_KBD_BOOT_REPORT_SIZE 8
255 int drv_usb_kbd_init(void);
256 int usb_kbd_deregister(int force);
260 int usb_init(void); /* initialize the USB Controller */
261 int usb_stop(void); /* stop the USB Controller */
262 int usb_detect_change(void); /* detect if a USB device has been (un)plugged */
265 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol);
266 int usb_set_idle(struct usb_device *dev, int ifnum, int duration,
268 int usb_control_msg(struct usb_device *dev, unsigned int pipe,
269 unsigned char request, unsigned char requesttype,
270 unsigned short value, unsigned short index,
271 void *data, unsigned short size, int timeout);
272 int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
273 void *data, int len, int *actual_length, int timeout);
274 int usb_int_msg(struct usb_device *dev, unsigned long pipe,
275 void *buffer, int transfer_len, int interval, bool nonblock);
276 int usb_lock_async(struct usb_device *dev, int lock);
277 int usb_disable_asynch(int disable);
278 int usb_maxpacket(struct usb_device *dev, unsigned long pipe);
279 int usb_get_configuration_no(struct usb_device *dev, int cfgno,
280 unsigned char *buffer, int length);
281 int usb_get_configuration_len(struct usb_device *dev, int cfgno);
282 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type,
283 unsigned char id, void *buf, int size);
284 int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
285 unsigned char type, unsigned char id, void *buf,
287 int usb_clear_halt(struct usb_device *dev, int pipe);
288 int usb_string(struct usb_device *dev, int index, char *buf, size_t size);
289 int usb_set_interface(struct usb_device *dev, int interface, int alternate);
290 int usb_get_port_status(struct usb_device *dev, int port, void *data);
292 /* big endian -> little endian conversion */
293 /* some CPUs are already little endian e.g. the ARM920T */
294 #define __swap_16(x) \
295 ({ unsigned short x_ = (unsigned short)x; \
297 ((x_ & 0x00FFU) << 8) | ((x_ & 0xFF00U) >> 8)); \
299 #define __swap_32(x) \
300 ({ unsigned long x_ = (unsigned long)x; \
302 ((x_ & 0x000000FFUL) << 24) | \
303 ((x_ & 0x0000FF00UL) << 8) | \
304 ((x_ & 0x00FF0000UL) >> 8) | \
305 ((x_ & 0xFF000000UL) >> 24)); \
308 #ifdef __LITTLE_ENDIAN
309 # define swap_16(x) (x)
310 # define swap_32(x) (x)
312 # define swap_16(x) __swap_16(x)
313 # define swap_32(x) __swap_32(x)
317 * Calling this entity a "pipe" is glorifying it. A USB pipe
318 * is something embarrassingly simple: it basically consists
319 * of the following information:
320 * - device number (7 bits)
321 * - endpoint number (4 bits)
322 * - current Data0/1 state (1 bit)
323 * - direction (1 bit)
325 * - max packet size (2 bits: 8, 16, 32 or 64)
326 * - pipe type (2 bits: control, interrupt, bulk, isochronous)
328 * That's 18 bits. Really. Nothing more. And the USB people have
329 * documented these eighteen bits as some kind of glorious
330 * virtual data structure.
332 * Let's not fall in that trap. We'll just encode it as a simple
333 * unsigned int. The encoding is:
335 * - max size: bits 0-1 (00 = 8, 01 = 16, 10 = 32, 11 = 64)
336 * - direction: bit 7 (0 = Host-to-Device [Out],
337 * (1 = Device-to-Host [In])
338 * - device: bits 8-14
339 * - endpoint: bits 15-18
341 * - pipe type: bits 30-31 (00 = isochronous, 01 = interrupt,
342 * 10 = control, 11 = bulk)
344 * Why? Because it's arbitrary, and whatever encoding we select is really
345 * up to us. This one happens to share a lot of bit positions with the UHCI
346 * specification, so that much of the uhci driver can just mask the bits
349 /* Create various pipes... */
350 #define create_pipe(dev,endpoint) \
351 (((dev)->devnum << 8) | ((endpoint) << 15) | \
352 (dev)->maxpacketsize)
353 #define default_pipe(dev) ((dev)->speed << 26)
355 #define usb_sndctrlpipe(dev, endpoint) ((PIPE_CONTROL << 30) | \
356 create_pipe(dev, endpoint))
357 #define usb_rcvctrlpipe(dev, endpoint) ((PIPE_CONTROL << 30) | \
358 create_pipe(dev, endpoint) | \
360 #define usb_sndisocpipe(dev, endpoint) ((PIPE_ISOCHRONOUS << 30) | \
361 create_pipe(dev, endpoint))
362 #define usb_rcvisocpipe(dev, endpoint) ((PIPE_ISOCHRONOUS << 30) | \
363 create_pipe(dev, endpoint) | \
365 #define usb_sndbulkpipe(dev, endpoint) ((PIPE_BULK << 30) | \
366 create_pipe(dev, endpoint))
367 #define usb_rcvbulkpipe(dev, endpoint) ((PIPE_BULK << 30) | \
368 create_pipe(dev, endpoint) | \
370 #define usb_sndintpipe(dev, endpoint) ((PIPE_INTERRUPT << 30) | \
371 create_pipe(dev, endpoint))
372 #define usb_rcvintpipe(dev, endpoint) ((PIPE_INTERRUPT << 30) | \
373 create_pipe(dev, endpoint) | \
375 #define usb_snddefctrl(dev) ((PIPE_CONTROL << 30) | \
377 #define usb_rcvdefctrl(dev) ((PIPE_CONTROL << 30) | \
378 default_pipe(dev) | \
381 /* The D0/D1 toggle bits */
382 #define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> ep) & 1)
383 #define usb_dotoggle(dev, ep, out) ((dev)->toggle[out] ^= (1 << ep))
384 #define usb_settoggle(dev, ep, out, bit) ((dev)->toggle[out] = \
385 ((dev)->toggle[out] & \
386 ~(1 << ep)) | ((bit) << ep))
388 /* Endpoint halt control/status */
389 #define usb_endpoint_out(ep_dir) (((ep_dir >> 7) & 1) ^ 1)
390 #define usb_endpoint_halt(dev, ep, out) ((dev)->halted[out] |= (1 << (ep)))
391 #define usb_endpoint_running(dev, ep, out) ((dev)->halted[out] &= ~(1 << (ep)))
392 #define usb_endpoint_halted(dev, ep, out) ((dev)->halted[out] & (1 << (ep)))
394 #define usb_packetid(pipe) (((pipe) & USB_DIR_IN) ? USB_PID_IN : \
397 #define usb_pipeout(pipe) ((((pipe) >> 7) & 1) ^ 1)
398 #define usb_pipein(pipe) (((pipe) >> 7) & 1)
399 #define usb_pipedevice(pipe) (((pipe) >> 8) & 0x7f)
400 #define usb_pipe_endpdev(pipe) (((pipe) >> 8) & 0x7ff)
401 #define usb_pipeendpoint(pipe) (((pipe) >> 15) & 0xf)
402 #define usb_pipedata(pipe) (((pipe) >> 19) & 1)
403 #define usb_pipetype(pipe) (((pipe) >> 30) & 3)
404 #define usb_pipeisoc(pipe) (usb_pipetype((pipe)) == PIPE_ISOCHRONOUS)
405 #define usb_pipeint(pipe) (usb_pipetype((pipe)) == PIPE_INTERRUPT)
406 #define usb_pipecontrol(pipe) (usb_pipetype((pipe)) == PIPE_CONTROL)
407 #define usb_pipebulk(pipe) (usb_pipetype((pipe)) == PIPE_BULK)
409 #define usb_pipe_ep_index(pipe) \
410 usb_pipecontrol(pipe) ? (usb_pipeendpoint(pipe) * 2) : \
411 ((usb_pipeendpoint(pipe) * 2) - \
412 (usb_pipein(pipe) ? 0 : 1))
415 * struct usb_device_id - identifies USB devices for probing and hotplugging
416 * @match_flags: Bit mask controlling which of the other fields are used to
417 * match against new devices. Any field except for driver_info may be
418 * used, although some only make sense in conjunction with other fields.
419 * This is usually set by a USB_DEVICE_*() macro, which sets all
420 * other fields in this structure except for driver_info.
421 * @idVendor: USB vendor ID for a device; numbers are assigned
422 * by the USB forum to its members.
423 * @idProduct: Vendor-assigned product ID.
424 * @bcdDevice_lo: Low end of range of vendor-assigned product version numbers.
425 * This is also used to identify individual product versions, for
426 * a range consisting of a single device.
427 * @bcdDevice_hi: High end of version number range. The range of product
428 * versions is inclusive.
429 * @bDeviceClass: Class of device; numbers are assigned
430 * by the USB forum. Products may choose to implement classes,
431 * or be vendor-specific. Device classes specify behavior of all
432 * the interfaces on a device.
433 * @bDeviceSubClass: Subclass of device; associated with bDeviceClass.
434 * @bDeviceProtocol: Protocol of device; associated with bDeviceClass.
435 * @bInterfaceClass: Class of interface; numbers are assigned
436 * by the USB forum. Products may choose to implement classes,
437 * or be vendor-specific. Interface classes specify behavior only
438 * of a given interface; other interfaces may support other classes.
439 * @bInterfaceSubClass: Subclass of interface; associated with bInterfaceClass.
440 * @bInterfaceProtocol: Protocol of interface; associated with bInterfaceClass.
441 * @bInterfaceNumber: Number of interface; composite devices may use
442 * fixed interface numbers to differentiate between vendor-specific
444 * @driver_info: Holds information used by the driver. Usually it holds
445 * a pointer to a descriptor understood by the driver, or perhaps
448 * In most cases, drivers will create a table of device IDs by using
449 * USB_DEVICE(), or similar macros designed for that purpose.
450 * They will then export it to userspace using MODULE_DEVICE_TABLE(),
451 * and provide it to the USB core through their usb_driver structure.
453 * See the usb_match_id() function for information about how matches are
454 * performed. Briefly, you will normally use one of several macros to help
455 * construct these entries. Each entry you provide will either identify
456 * one or more specific products, or will identify a class of products
457 * which have agreed to behave the same. You should put the more specific
458 * matches towards the beginning of your table, so that driver_info can
459 * record quirks of specific products.
461 struct usb_device_id {
462 /* which fields to match against? */
465 /* Used for product specific matches; range is inclusive */
471 /* Used for device class matches */
476 /* Used for interface class matches */
478 u8 bInterfaceSubClass;
479 u8 bInterfaceProtocol;
481 /* Used for vendor-specific interface matches */
484 /* not matched against */
488 /* Some useful macros to use to create struct usb_device_id */
489 #define USB_DEVICE_ID_MATCH_VENDOR 0x0001
490 #define USB_DEVICE_ID_MATCH_PRODUCT 0x0002
491 #define USB_DEVICE_ID_MATCH_DEV_LO 0x0004
492 #define USB_DEVICE_ID_MATCH_DEV_HI 0x0008
493 #define USB_DEVICE_ID_MATCH_DEV_CLASS 0x0010
494 #define USB_DEVICE_ID_MATCH_DEV_SUBCLASS 0x0020
495 #define USB_DEVICE_ID_MATCH_DEV_PROTOCOL 0x0040
496 #define USB_DEVICE_ID_MATCH_INT_CLASS 0x0080
497 #define USB_DEVICE_ID_MATCH_INT_SUBCLASS 0x0100
498 #define USB_DEVICE_ID_MATCH_INT_PROTOCOL 0x0200
499 #define USB_DEVICE_ID_MATCH_INT_NUMBER 0x0400
501 /* Match anything, indicates this is a valid entry even if everything is 0 */
502 #define USB_DEVICE_ID_MATCH_NONE 0x0800
503 #define USB_DEVICE_ID_MATCH_ALL 0x07ff
506 * struct usb_driver_entry - Matches a driver to its usb_device_ids
507 * @driver: Driver to use
508 * @match: List of match records for this driver, terminated by {}
510 struct usb_driver_entry {
511 struct driver *driver;
512 const struct usb_device_id *match;
515 #define USB_DEVICE_ID_MATCH_DEVICE \
516 (USB_DEVICE_ID_MATCH_VENDOR | USB_DEVICE_ID_MATCH_PRODUCT)
519 * USB_DEVICE - macro used to describe a specific usb device
520 * @vend: the 16 bit USB Vendor ID
521 * @prod: the 16 bit USB Product ID
523 * This macro is used to create a struct usb_device_id that matches a
526 #define USB_DEVICE(vend, prod) \
527 .match_flags = USB_DEVICE_ID_MATCH_DEVICE, \
528 .idVendor = (vend), \
531 #define U_BOOT_USB_DEVICE(__name, __match) \
532 ll_entry_declare(struct usb_driver_entry, __name, usb_driver_entry) = {\
533 .driver = llsym(struct driver, __name, driver), \
537 /*************************************************************************
540 struct usb_port_status {
541 unsigned short wPortStatus;
542 unsigned short wPortChange;
543 } __attribute__ ((packed));
545 struct usb_hub_status {
546 unsigned short wHubStatus;
547 unsigned short wHubChange;
548 } __attribute__ ((packed));
551 * Hub Device descriptor
552 * USB Hub class device protocols
554 #define USB_HUB_PR_FS 0 /* Full speed hub */
555 #define USB_HUB_PR_HS_NO_TT 0 /* Hi-speed hub without TT */
556 #define USB_HUB_PR_HS_SINGLE_TT 1 /* Hi-speed hub with single TT */
557 #define USB_HUB_PR_HS_MULTI_TT 2 /* Hi-speed hub with multiple TT */
558 #define USB_HUB_PR_SS 3 /* Super speed hub */
560 /* Transaction Translator Think Times, in bits */
561 #define HUB_TTTT_8_BITS 0x00
562 #define HUB_TTTT_16_BITS 0x20
563 #define HUB_TTTT_24_BITS 0x40
564 #define HUB_TTTT_32_BITS 0x60
567 struct usb_hub_descriptor {
568 unsigned char bLength;
569 unsigned char bDescriptorType;
570 unsigned char bNbrPorts;
571 unsigned short wHubCharacteristics;
572 unsigned char bPwrOn2PwrGood;
573 unsigned char bHubContrCurrent;
574 /* 2.0 and 3.0 hubs differ here */
577 /* add 1 bit for hub status change; round to bytes */
578 __u8 DeviceRemovable[(USB_MAXCHILDREN + 1 + 7) / 8];
579 __u8 PortPowerCtrlMask[(USB_MAXCHILDREN + 1 + 7) / 8];
580 } __attribute__ ((packed)) hs;
585 __le16 DeviceRemovable;
586 } __attribute__ ((packed)) ss;
588 } __attribute__ ((packed));
591 struct usb_hub_device {
592 struct usb_device *pusb_dev;
593 struct usb_hub_descriptor desc;
595 ulong connect_timeout; /* Device connection timeout in ms */
596 ulong query_delay; /* Device query delay in ms */
597 int overcurrent_count[USB_MAXCHILDREN]; /* Over-current counter */
598 int hub_depth; /* USB 3.0 hub depth */
599 struct usb_tt tt; /* Transaction Translator */
602 #if CONFIG_IS_ENABLED(DM_USB)
604 * struct usb_plat - Platform data about a USB controller
606 * Given a USB controller (UCLASS_USB) dev this is dev_get_plat(dev)
609 enum usb_init_type init_type;
613 * struct usb_dev_plat - Platform data about a USB device
615 * Given a USB device dev this structure is dev_get_parent_plat(dev).
616 * This is used by sandbox to provide emulation data also.
618 * @id: ID used to match this device
619 * @devnum: Device address on the USB bus
620 * @udev: usb-uclass internal use only do NOT use
621 * @strings: List of descriptor strings (for sandbox emulation purposes)
622 * @desc_list: List of descriptors (for sandbox emulation purposes)
624 struct usb_dev_plat {
625 struct usb_device_id id;
628 * This pointer is used to pass the usb_device used in usb_scan_device,
629 * to get the usb descriptors before the driver is known, to the
630 * actual udevice once the driver is known and the udevice is created.
631 * This will be NULL except during probe, do NOT use.
633 * This should eventually go away.
635 struct usb_device *udev;
636 #ifdef CONFIG_SANDBOX
637 struct usb_string *strings;
638 /* NULL-terminated list of descriptor pointers */
639 struct usb_generic_descriptor **desc_list;
645 * struct usb_bus_priv - information about the USB controller
647 * Given a USB controller (UCLASS_USB) 'dev', this is
648 * dev_get_uclass_priv(dev).
650 * @next_addr: Next device address to allocate minus 1. Incremented by 1
651 * each time a new device address is set, so this holds the
652 * number of devices on the bus
653 * @desc_before_addr: true if we can read a device descriptor before it
654 * has been assigned an address. For XHCI this is not possible
655 * so this will be false.
656 * @companion: True if this is a companion controller to another USB
659 struct usb_bus_priv {
661 bool desc_before_addr;
666 * struct usb_emul_plat - platform data about the USB emulator
668 * Given a USB emulator (UCLASS_USB_EMUL) 'dev', this is
669 * dev_get_uclass_plat(dev).
671 * @port1: USB emulator device port number on the parent hub
673 struct usb_emul_plat {
674 int port1; /* Port number (numbered from 1) */
678 * struct dm_usb_ops - USB controller operations
680 * This defines the operations supoorted on a USB controller. Common
683 * @bus: USB bus (i.e. controller), which is in UCLASS_USB.
684 * @udev: USB device parent data. Controllers are not expected to need
685 * this, since the device address on the bus is encoded in @pipe.
686 * It is used for sandbox, and can be handy for debugging and
688 * @pipe: An assortment of bitfields which provide address and packet
689 * type information. See create_pipe() above for encoding
691 * @buffer: A buffer to use for sending/receiving. This should be
693 * @length: Buffer length in bytes
697 * control() - Send a control message
699 * Most parameters are as above.
701 * @setup: Additional setup information required by the message
703 int (*control)(struct udevice *bus, struct usb_device *udev,
704 unsigned long pipe, void *buffer, int length,
705 struct devrequest *setup);
707 * bulk() - Send a bulk message
709 * Parameters are as above.
711 int (*bulk)(struct udevice *bus, struct usb_device *udev,
712 unsigned long pipe, void *buffer, int length);
714 * interrupt() - Send an interrupt message
716 * Most parameters are as above.
718 * @interval: Interrupt interval
720 int (*interrupt)(struct udevice *bus, struct usb_device *udev,
721 unsigned long pipe, void *buffer, int length,
722 int interval, bool nonblock);
725 * create_int_queue() - Create and queue interrupt packets
727 * Create and queue @queuesize number of interrupt usb packets of
728 * @elementsize bytes each. @buffer must be atleast @queuesize *
729 * @elementsize bytes.
731 * Note some controllers only support a queuesize of 1.
733 * @interval: Interrupt interval
735 * @return A pointer to the created interrupt queue or NULL on error
737 struct int_queue * (*create_int_queue)(struct udevice *bus,
738 struct usb_device *udev, unsigned long pipe,
739 int queuesize, int elementsize, void *buffer,
743 * poll_int_queue() - Poll an interrupt queue for completed packets
745 * Poll an interrupt queue for completed packets. The return value
746 * points to the part of the buffer passed to create_int_queue()
747 * corresponding to the completed packet.
749 * @queue: queue to poll
751 * @return Pointer to the data of the first completed packet, or
752 * NULL if no packets are ready
754 void * (*poll_int_queue)(struct udevice *bus, struct usb_device *udev,
755 struct int_queue *queue);
758 * destroy_int_queue() - Destroy an interrupt queue
760 * Destroy an interrupt queue created by create_int_queue().
762 * @queue: queue to poll
764 * @return 0 if OK, -ve on error
766 int (*destroy_int_queue)(struct udevice *bus, struct usb_device *udev,
767 struct int_queue *queue);
770 * alloc_device() - Allocate a new device context (XHCI)
772 * Before sending packets to a new device on an XHCI bus, a device
773 * context must be created. If this method is not NULL it will be
774 * called before the device is enumerated (even before its descriptor
775 * is read). This should be NULL for EHCI, which does not need this.
777 int (*alloc_device)(struct udevice *bus, struct usb_device *udev);
780 * reset_root_port() - Reset usb root port
782 int (*reset_root_port)(struct udevice *bus, struct usb_device *udev);
785 * update_hub_device() - Update HCD's internal representation of hub
787 * After a hub descriptor is fetched, notify HCD so that its internal
788 * representation of this hub can be updated (xHCI)
790 int (*update_hub_device)(struct udevice *bus, struct usb_device *udev);
793 * get_max_xfer_size() - Get HCD's maximum transfer bytes
795 * The HCD may have limitation on the maximum bytes to be transferred
796 * in a USB transfer. USB class driver needs to be aware of this.
798 int (*get_max_xfer_size)(struct udevice *bus, size_t *size);
801 * lock_async() - Keep async schedule after a transfer
803 * It may be desired to keep the asynchronous schedule running even
804 * after a transfer finishes, usually when doing multiple transfers
805 * back-to-back. This callback allows signalling the USB controller
806 * driver to do just that.
808 int (*lock_async)(struct udevice *udev, int lock);
811 #define usb_get_ops(dev) ((struct dm_usb_ops *)(dev)->driver->ops)
812 #define usb_get_emul_ops(dev) ((struct dm_usb_ops *)(dev)->driver->ops)
815 * usb_setup_device() - set up a device ready for use
817 * @dev: USB device pointer. This need not be a real device - it is
818 * common for it to just be a local variable with its ->dev
819 * member (i.e. @dev->dev) set to the parent device and
820 * dev->portnr set to the port number on the hub (1=first)
821 * @do_read: true to read the device descriptor before an address is set
822 * (should be false for XHCI buses, true otherwise)
823 * @parent: Parent device (either UCLASS_USB or UCLASS_USB_HUB)
824 * Return: 0 if OK, -ve on error */
825 int usb_setup_device(struct usb_device *dev, bool do_read,
826 struct usb_device *parent);
829 * usb_hub_is_root_hub() - Test whether a hub device is root hub or not
831 * @hub: USB hub device to test
832 * @return: true if the hub device is root hub, false otherwise.
834 bool usb_hub_is_root_hub(struct udevice *hub);
837 * usb_hub_scan() - Scan a hub and find its devices
839 * @hub: Hub device to scan
841 int usb_hub_scan(struct udevice *hub);
844 * usb_scan_device() - Scan a device on a bus
846 * Scan a device on a bus. It has already been detected and is ready to
847 * be enumerated. This may be either the root hub (@parent is a bus) or a
848 * normal device (@parent is a hub)
850 * @parent: Parent device
851 * @port: Hub port number (numbered from 1)
852 * @speed: USB speed to use for this device
853 * @devp: Returns pointer to device if all is well
854 * Return: 0 if OK, -ve on error
856 int usb_scan_device(struct udevice *parent, int port,
857 enum usb_device_speed speed, struct udevice **devp);
860 * usb_get_bus() - Find the bus for a device
862 * Search up through parents to find the bus this device is connected to. This
863 * will be a device with uclass UCLASS_USB.
865 * @dev: Device to check
866 * Return: The bus, or NULL if not found (this indicates a critical error in
869 struct udevice *usb_get_bus(struct udevice *dev);
872 * usb_select_config() - Set up a device ready for use
874 * This function assumes that the device already has an address and a driver
875 * bound, and is ready to be set up.
877 * This re-reads the device and configuration descriptors and sets the
880 * @dev: Device to set up
882 int usb_select_config(struct usb_device *dev);
885 * usb_child_pre_probe() - Pre-probe function for USB devices
887 * This is called on all children of hubs and USB controllers (i.e. UCLASS_USB
888 * and UCLASS_USB_HUB) when a new device is about to be probed. It sets up the
889 * device from the saved platform data and calls usb_select_config() to
892 * Once this is done, the device's normal driver can take over, knowing the
893 * device is accessible on the USB bus.
895 * This function is for use only by the internal USB stack.
897 * @dev: Device to set up
899 int usb_child_pre_probe(struct udevice *dev);
904 * usb_setup_ehci_gadget() - Set up a USB device as a gadget
906 * TODO(sjg@chromium.org): Tidy this up when USB gadgets can use driver model
908 * This provides a way to tell a controller to start up as a USB device
909 * instead of as a host. It is untested.
911 int usb_setup_ehci_gadget(struct ehci_ctrl **ctlrp);
914 * usb_remove_ehci_gadget() - Remove a gadget USB device
916 * TODO(sjg@chromium.org): Tidy this up when USB gadgets can use driver model
918 * This provides a way to tell a controller to remove a USB device
920 int usb_remove_ehci_gadget(struct ehci_ctrl **ctlrp);
923 * usb_stor_reset() - Prepare to scan USB storage devices
925 * Empty the list of USB storage devices in preparation for scanning them.
926 * This must be called before a USB scan.
928 void usb_stor_reset(void);
930 #else /* !CONFIG_IS_ENABLED(DM_USB) */
932 struct usb_device *usb_get_dev_index(int index);
936 bool usb_device_has_child_on_port(struct usb_device *parent, int port);
938 int usb_hub_probe(struct usb_device *dev, int ifnum);
939 void usb_hub_reset(void);
942 * usb_find_usb2_hub_address_port() - Get hub address and port for TT setting
944 * Searches for the first HS hub above the given device. If a
945 * HS hub is found, the hub address and the port the device is
946 * connected to is return, as required for SPLIT transactions
948 * @param: udev full speed or low speed device
950 void usb_find_usb2_hub_address_port(struct usb_device *udev,
951 uint8_t *hub_address, uint8_t *hub_port);
954 * usb_alloc_new_device() - Allocate a new device
956 * @devp: returns a pointer of a new device structure. With driver model this
957 * is a device pointer, but with legacy USB this pointer is
959 * Return: 0 if OK, -ENOSPC if we have found out of room for new devices
961 int usb_alloc_new_device(struct udevice *controller, struct usb_device **devp);
964 * usb_free_device() - Free a partially-inited device
966 * This is an internal function. It is used to reverse the action of
967 * usb_alloc_new_device() when we hit a problem during init.
969 void usb_free_device(struct udevice *controller);
971 int usb_new_device(struct usb_device *dev);
973 int usb_alloc_device(struct usb_device *dev);
976 * usb_update_hub_device() - Update HCD's internal representation of hub
978 * After a hub descriptor is fetched, notify HCD so that its internal
979 * representation of this hub can be updated.
982 * Return: 0 if OK, -ve on error
984 int usb_update_hub_device(struct usb_device *dev);
987 * usb_get_max_xfer_size() - Get HCD's maximum transfer bytes
989 * The HCD may have limitation on the maximum bytes to be transferred
990 * in a USB transfer. USB class driver needs to be aware of this.
993 * @size: maximum transfer bytes
994 * Return: 0 if OK, -ve on error
996 int usb_get_max_xfer_size(struct usb_device *dev, size_t *size);
999 * usb_emul_setup_device() - Set up a new USB device emulation
1001 * This is normally called when a new emulation device is bound. It tells
1002 * the USB emulation uclass about the features of the emulator.
1004 * @dev: Emulation device
1005 * @strings: List of USB string descriptors, terminated by a NULL
1007 * @desc_list: List of points or USB descriptors, terminated by NULL.
1008 * The first entry must be struct usb_device_descriptor,
1009 * and others follow on after that.
1010 * Return: 0 if OK, -ENOSYS if not implemented, other -ve on error
1012 int usb_emul_setup_device(struct udevice *dev, struct usb_string *strings,
1016 * usb_emul_control() - Send a control packet to an emulator
1018 * @emul: Emulator device
1019 * @udev: USB device (which the emulator is causing to appear)
1020 * See struct dm_usb_ops for details on other parameters
1021 * Return: 0 if OK, -ve on error
1023 int usb_emul_control(struct udevice *emul, struct usb_device *udev,
1024 unsigned long pipe, void *buffer, int length,
1025 struct devrequest *setup);
1028 * usb_emul_bulk() - Send a bulk packet to an emulator
1030 * @emul: Emulator device
1031 * @udev: USB device (which the emulator is causing to appear)
1032 * See struct dm_usb_ops for details on other parameters
1033 * Return: 0 if OK, -ve on error
1035 int usb_emul_bulk(struct udevice *emul, struct usb_device *udev,
1036 unsigned long pipe, void *buffer, int length);
1039 * usb_emul_int() - Send an interrupt packet to an emulator
1041 * @emul: Emulator device
1042 * @udev: USB device (which the emulator is causing to appear)
1043 * See struct dm_usb_ops for details on other parameters
1044 * Return: 0 if OK, -ve on error
1046 int usb_emul_int(struct udevice *emul, struct usb_device *udev,
1047 unsigned long pipe, void *buffer, int length, int interval,
1051 * usb_emul_find() - Find an emulator for a particular device
1053 * Check @pipe and @port1 to find a device number on bus @bus and return it.
1055 * @bus: USB bus (controller)
1056 * @pipe: Describes pipe being used, and includes the device number
1057 * @port1: Describes port number on the parent hub
1058 * @emulp: Returns pointer to emulator, or NULL if not found
1059 * Return: 0 if found, -ve on error
1061 int usb_emul_find(struct udevice *bus, ulong pipe, int port1,
1062 struct udevice **emulp);
1065 * usb_emul_find_for_dev() - Find an emulator for a particular device
1067 * @dev: USB device to check
1068 * @emulp: Returns pointer to emulator, or NULL if not found
1069 * Return: 0 if found, -ve on error
1071 int usb_emul_find_for_dev(struct udevice *dev, struct udevice **emulp);
1074 * usb_emul_find_descriptor() - Find a USB descriptor of a particular device
1076 * @ptr: a pointer to a list of USB descriptor pointers
1077 * @type: type of USB descriptor to find
1078 * @index: if @type is USB_DT_CONFIG, this is the configuration value
1079 * Return: a pointer to the USB descriptor found, NULL if not found
1081 struct usb_generic_descriptor **usb_emul_find_descriptor(
1082 struct usb_generic_descriptor **ptr, int type, int index);
1085 * usb_show_tree() - show the USB device tree
1087 * This shows a list of active USB devices along with basic information about
1090 void usb_show_tree(void);