include/usb.h

   1 /*
   2  * (C) Copyright 2001
   3  * Denis Peter, MPL AG Switzerland
   4  *
   5  * Adapted for U-Boot driver model
   6  * (C) Copyright 2015 Google, Inc
   7  *
   8  * SPDX-License-Identifier:     GPL-2.0+
   9  * Note: Part of this code has been derived from linux
  10  *
  11  */
  12 #ifndef _USB_H_
  13 #define _USB_H_
  14
  15 #include <fdtdec.h>
  16 #include <usb_defs.h>
  17 #include <linux/usb/ch9.h>
  18 #include <asm/cache.h>
  19 #include <part.h>
  20
  21 /*
  22  * The EHCI spec says that we must align to at least 32 bytes.  However,
  23  * some platforms require larger alignment.
  24  */
  25 #if ARCH_DMA_MINALIGN > 32
  26 #define USB_DMA_MINALIGN        ARCH_DMA_MINALIGN
  27 #else
  28 #define USB_DMA_MINALIGN        32
  29 #endif
  30
  31 /* Everything is aribtrary */
  32 #define USB_ALTSETTINGALLOC             4
  33 #define USB_MAXALTSETTING               128     /* Hard limit */
  34
  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
  41
  42 #define USB_CNTL_TIMEOUT 100 /* 100ms timeout */
  43
  44 /*
  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.
  47  */
  48 #define USB_TIMEOUT_MS(pipe) (usb_pipebulk(pipe) ? 5000 : 1000)
  49
  50 /* device request (setup) */
  51 struct devrequest {
  52         __u8    requesttype;
  53         __u8    request;
  54         __le16  value;
  55         __le16  index;
  56         __le16  length;
  57 } __attribute__ ((packed));
  58
  59 /* Interface */
  60 struct usb_interface {
  61         struct usb_interface_descriptor desc;
  62
  63         __u8    no_of_ep;
  64         __u8    num_altsetting;
  65         __u8    act_altsetting;
  66
  67         struct usb_endpoint_descriptor ep_desc[USB_MAXENDPOINTS];
  68         /*
  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
  72          */
  73         struct usb_ss_ep_comp_descriptor ss_ep_comp_desc[USB_MAXENDPOINTS];
  74 } __attribute__ ((packed));
  75
  76 /* Configuration information.. */
  77 struct usb_config {
  78         struct usb_config_descriptor desc;
  79
  80         __u8    no_of_if;       /* number of interfaces */
  81         struct usb_interface if_desc[USB_MAXINTERFACES];
  82 } __attribute__ ((packed));
  83
  84 enum {
  85         /* Maximum packet size; encoded as 0,1,2,3 = 8,16,32,64 */
  86         PACKET_SIZE_8   = 0,
  87         PACKET_SIZE_16  = 1,
  88         PACKET_SIZE_32  = 2,
  89         PACKET_SIZE_64  = 3,
  90 };
  91
  92 /**
  93  * struct usb_device - information about a USB device
  94  *
  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.
 100  *
 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.
 104  */
 105 struct usb_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 */
 111
 112         /* Maximum packet size; one of: PACKET_SIZE_* */
 113         int maxpacketsize;
 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
 118          */
 119         unsigned int halted[2];
 120         int epmaxpacketin[16];          /* INput endpoint specific maximums */
 121         int epmaxpacketout[16];         /* OUTput endpoint specific maximums */
 122
 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 */
 128
 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 */
 134         void *privptr;
 135         /*
 136          * Child devices -  if this is a hub device
 137          * Each instance needs its own set of data structures.
 138          */
 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 */
 149 #endif
 150         /* slot_id - for xHCI enabled devices */
 151         unsigned int slot_id;
 152 #ifdef CONFIG_DM_USB
 153         struct udevice *dev;            /* Pointer to associated device */
 154         struct udevice *controller_dev; /* Pointer to associated controller */
 155 #endif
 156 };
 157
 158 struct int_queue;
 159
 160 /*
 161  * You can initialize platform's USB host or device
 162  * ports by passing this enum as an argument to
 163  * board_usb_init().
 164  */
 165 enum usb_init_type {
 166         USB_INIT_HOST,
 167         USB_INIT_DEVICE
 168 };
 169
 170 /**********************************************************************
 171  * this is how the lowlevel part communicate with the outer world
 172  */
 173
 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)
 184
 185 int usb_lowlevel_init(int index, enum usb_init_type init, void **controller);
 186 int usb_lowlevel_stop(int index);
 187
 188 #if defined(CONFIG_MUSB_HOST) || defined(CONFIG_DM_USB)
 189 int usb_reset_root_port(void);
 190 #else
 191 #define usb_reset_root_port()
 192 #endif
 193
 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);
 200
 201 #if defined CONFIG_USB_EHCI || defined CONFIG_MUSB_HOST
 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);
 206 #endif
 207
 208 /* Defines */
 209 #define USB_UHCI_VEND_ID        0x8086
 210 #define USB_UHCI_DEV_ID         0x7112
 211
 212 /*
 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.
 218  */
 219 #elif defined(CONFIG_USB_GADGET_PXA2XX)
 220
 221 extern void udc_disconnect(void);
 222
 223 #endif
 224
 225 /*
 226  * board-specific hardware initialization, called by
 227  * usb drivers and u-boot commands
 228  *
 229  * @param index USB controller number
 230  * @param init initializes controller as USB host or device
 231  */
 232 int board_usb_init(int index, enum usb_init_type init);
 233
 234 /*
 235  * can be used to clean up after failed USB initialization attempt
 236  * vide: board_usb_init()
 237  *
 238  * @param index USB controller number for selective cleanup
 239  * @param init usb_init_type passed to board_usb_init()
 240  */
 241 int board_usb_cleanup(int index, enum usb_init_type init);
 242
 243 #ifdef CONFIG_USB_STORAGE
 244
 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);
 249
 250 #endif
 251
 252 #ifdef CONFIG_USB_HOST_ETHER
 253
 254 #define USB_MAX_ETH_DEV 5
 255 int usb_host_eth_scan(int mode);
 256
 257 #endif
 258
 259 #ifdef CONFIG_USB_KEYBOARD
 260
 261 int drv_usb_kbd_init(void);
 262 int usb_kbd_deregister(int force);
 263
 264 #endif
 265 /* routines */
 266 int usb_init(void); /* initialize the USB Controller */
 267 int usb_stop(void); /* stop the USB Controller */
 268
 269
 270 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol);
 271 int usb_set_idle(struct usb_device *dev, int ifnum, int duration,
 272                         int report_id);
 273 int usb_control_msg(struct usb_device *dev, unsigned int pipe,
 274                         unsigned char request, unsigned char requesttype,
 275                         unsigned short value, unsigned short index,
 276                         void *data, unsigned short size, int timeout);
 277 int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
 278                         void *data, int len, int *actual_length, int timeout);
 279 int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe,
 280                         void *buffer, int transfer_len, int interval);
 281 int usb_disable_asynch(int disable);
 282 int usb_maxpacket(struct usb_device *dev, unsigned long pipe);
 283 int usb_get_configuration_no(struct usb_device *dev, unsigned char *buffer,
 284                                 int cfgno);
 285 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type,
 286                         unsigned char id, void *buf, int size);
 287 int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
 288                         unsigned char type, unsigned char id, void *buf,
 289                         int size);
 290 int usb_clear_halt(struct usb_device *dev, int pipe);
 291 int usb_string(struct usb_device *dev, int index, char *buf, size_t size);
 292 int usb_set_interface(struct usb_device *dev, int interface, int alternate);
 293
 294 /* big endian -> little endian conversion */
 295 /* some CPUs are already little endian e.g. the ARM920T */
 296 #define __swap_16(x) \
 297         ({ unsigned short x_ = (unsigned short)x; \
 298          (unsigned short)( \
 299                 ((x_ & 0x00FFU) << 8) | ((x_ & 0xFF00U) >> 8)); \
 300         })
 301 #define __swap_32(x) \
 302         ({ unsigned long x_ = (unsigned long)x; \
 303          (unsigned long)( \
 304                 ((x_ & 0x000000FFUL) << 24) | \
 305                 ((x_ & 0x0000FF00UL) <<  8) | \
 306                 ((x_ & 0x00FF0000UL) >>  8) | \
 307                 ((x_ & 0xFF000000UL) >> 24)); \
 308         })
 309
 310 #ifdef __LITTLE_ENDIAN
 311 # define swap_16(x) (x)
 312 # define swap_32(x) (x)
 313 #else
 314 # define swap_16(x) __swap_16(x)
 315 # define swap_32(x) __swap_32(x)
 316 #endif
 317
 318 /*
 319  * Calling this entity a "pipe" is glorifying it. A USB pipe
 320  * is something embarrassingly simple: it basically consists
 321  * of the following information:
 322  *  - device number (7 bits)
 323  *  - endpoint number (4 bits)
 324  *  - current Data0/1 state (1 bit)
 325  *  - direction (1 bit)
 326  *  - speed (2 bits)
 327  *  - max packet size (2 bits: 8, 16, 32 or 64)
 328  *  - pipe type (2 bits: control, interrupt, bulk, isochronous)
 329  *
 330  * That's 18 bits. Really. Nothing more. And the USB people have
 331  * documented these eighteen bits as some kind of glorious
 332  * virtual data structure.
 333  *
 334  * Let's not fall in that trap. We'll just encode it as a simple
 335  * unsigned int. The encoding is:
 336  *
 337  *  - max size:         bits 0-1        (00 = 8, 01 = 16, 10 = 32, 11 = 64)
 338  *  - direction:        bit 7           (0 = Host-to-Device [Out],
 339  *                                      (1 = Device-to-Host [In])
 340  *  - device:           bits 8-14
 341  *  - endpoint:         bits 15-18
 342  *  - Data0/1:          bit 19
 343  *  - pipe type:        bits 30-31      (00 = isochronous, 01 = interrupt,
 344  *                                       10 = control, 11 = bulk)
 345  *
 346  * Why? Because it's arbitrary, and whatever encoding we select is really
 347  * up to us. This one happens to share a lot of bit positions with the UHCI
 348  * specification, so that much of the uhci driver can just mask the bits
 349  * appropriately.
 350  */
 351 /* Create various pipes... */
 352 #define create_pipe(dev,endpoint) \
 353                 (((dev)->devnum << 8) | ((endpoint) << 15) | \
 354                 (dev)->maxpacketsize)
 355 #define default_pipe(dev) ((dev)->speed << 26)
 356
 357 #define usb_sndctrlpipe(dev, endpoint)  ((PIPE_CONTROL << 30) | \
 358                                          create_pipe(dev, endpoint))
 359 #define usb_rcvctrlpipe(dev, endpoint)  ((PIPE_CONTROL << 30) | \
 360                                          create_pipe(dev, endpoint) | \
 361                                          USB_DIR_IN)
 362 #define usb_sndisocpipe(dev, endpoint)  ((PIPE_ISOCHRONOUS << 30) | \
 363                                          create_pipe(dev, endpoint))
 364 #define usb_rcvisocpipe(dev, endpoint)  ((PIPE_ISOCHRONOUS << 30) | \
 365                                          create_pipe(dev, endpoint) | \
 366                                          USB_DIR_IN)
 367 #define usb_sndbulkpipe(dev, endpoint)  ((PIPE_BULK << 30) | \
 368                                          create_pipe(dev, endpoint))
 369 #define usb_rcvbulkpipe(dev, endpoint)  ((PIPE_BULK << 30) | \
 370                                          create_pipe(dev, endpoint) | \
 371                                          USB_DIR_IN)
 372 #define usb_sndintpipe(dev, endpoint)   ((PIPE_INTERRUPT << 30) | \
 373                                          create_pipe(dev, endpoint))
 374 #define usb_rcvintpipe(dev, endpoint)   ((PIPE_INTERRUPT << 30) | \
 375                                          create_pipe(dev, endpoint) | \
 376                                          USB_DIR_IN)
 377 #define usb_snddefctrl(dev)             ((PIPE_CONTROL << 30) | \
 378                                          default_pipe(dev))
 379 #define usb_rcvdefctrl(dev)             ((PIPE_CONTROL << 30) | \
 380                                          default_pipe(dev) | \
 381                                          USB_DIR_IN)
 382
 383 /* The D0/D1 toggle bits */
 384 #define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> ep) & 1)
 385 #define usb_dotoggle(dev, ep, out)  ((dev)->toggle[out] ^= (1 << ep))
 386 #define usb_settoggle(dev, ep, out, bit) ((dev)->toggle[out] = \
 387                                                 ((dev)->toggle[out] & \
 388                                                  ~(1 << ep)) | ((bit) << ep))
 389
 390 /* Endpoint halt control/status */
 391 #define usb_endpoint_out(ep_dir)        (((ep_dir >> 7) & 1) ^ 1)
 392 #define usb_endpoint_halt(dev, ep, out) ((dev)->halted[out] |= (1 << (ep)))
 393 #define usb_endpoint_running(dev, ep, out) ((dev)->halted[out] &= ~(1 << (ep)))
 394 #define usb_endpoint_halted(dev, ep, out) ((dev)->halted[out] & (1 << (ep)))
 395
 396 #define usb_packetid(pipe)      (((pipe) & USB_DIR_IN) ? USB_PID_IN : \
 397                                  USB_PID_OUT)
 398
 399 #define usb_pipeout(pipe)       ((((pipe) >> 7) & 1) ^ 1)
 400 #define usb_pipein(pipe)        (((pipe) >> 7) & 1)
 401 #define usb_pipedevice(pipe)    (((pipe) >> 8) & 0x7f)
 402 #define usb_pipe_endpdev(pipe)  (((pipe) >> 8) & 0x7ff)
 403 #define usb_pipeendpoint(pipe)  (((pipe) >> 15) & 0xf)
 404 #define usb_pipedata(pipe)      (((pipe) >> 19) & 1)
 405 #define usb_pipetype(pipe)      (((pipe) >> 30) & 3)
 406 #define usb_pipeisoc(pipe)      (usb_pipetype((pipe)) == PIPE_ISOCHRONOUS)
 407 #define usb_pipeint(pipe)       (usb_pipetype((pipe)) == PIPE_INTERRUPT)
 408 #define usb_pipecontrol(pipe)   (usb_pipetype((pipe)) == PIPE_CONTROL)
 409 #define usb_pipebulk(pipe)      (usb_pipetype((pipe)) == PIPE_BULK)
 410
 411 #define usb_pipe_ep_index(pipe) \
 412                 usb_pipecontrol(pipe) ? (usb_pipeendpoint(pipe) * 2) : \
 413                                 ((usb_pipeendpoint(pipe) * 2) - \
 414                                  (usb_pipein(pipe) ? 0 : 1))
 415
 416 /**
 417  * struct usb_device_id - identifies USB devices for probing and hotplugging
 418  * @match_flags: Bit mask controlling which of the other fields are used to
 419  *      match against new devices. Any field except for driver_info may be
 420  *      used, although some only make sense in conjunction with other fields.
 421  *      This is usually set by a USB_DEVICE_*() macro, which sets all
 422  *      other fields in this structure except for driver_info.
 423  * @idVendor: USB vendor ID for a device; numbers are assigned
 424  *      by the USB forum to its members.
 425  * @idProduct: Vendor-assigned product ID.
 426  * @bcdDevice_lo: Low end of range of vendor-assigned product version numbers.
 427  *      This is also used to identify individual product versions, for
 428  *      a range consisting of a single device.
 429  * @bcdDevice_hi: High end of version number range.  The range of product
 430  *      versions is inclusive.
 431  * @bDeviceClass: Class of device; numbers are assigned
 432  *      by the USB forum.  Products may choose to implement classes,
 433  *      or be vendor-specific.  Device classes specify behavior of all
 434  *      the interfaces on a device.
 435  * @bDeviceSubClass: Subclass of device; associated with bDeviceClass.
 436  * @bDeviceProtocol: Protocol of device; associated with bDeviceClass.
 437  * @bInterfaceClass: Class of interface; numbers are assigned
 438  *      by the USB forum.  Products may choose to implement classes,
 439  *      or be vendor-specific.  Interface classes specify behavior only
 440  *      of a given interface; other interfaces may support other classes.
 441  * @bInterfaceSubClass: Subclass of interface; associated with bInterfaceClass.
 442  * @bInterfaceProtocol: Protocol of interface; associated with bInterfaceClass.
 443  * @bInterfaceNumber: Number of interface; composite devices may use
 444  *      fixed interface numbers to differentiate between vendor-specific
 445  *      interfaces.
 446  * @driver_info: Holds information used by the driver.  Usually it holds
 447  *      a pointer to a descriptor understood by the driver, or perhaps
 448  *      device flags.
 449  *
 450  * In most cases, drivers will create a table of device IDs by using
 451  * USB_DEVICE(), or similar macros designed for that purpose.
 452  * They will then export it to userspace using MODULE_DEVICE_TABLE(),
 453  * and provide it to the USB core through their usb_driver structure.
 454  *
 455  * See the usb_match_id() function for information about how matches are
 456  * performed.  Briefly, you will normally use one of several macros to help
 457  * construct these entries.  Each entry you provide will either identify
 458  * one or more specific products, or will identify a class of products
 459  * which have agreed to behave the same.  You should put the more specific
 460  * matches towards the beginning of your table, so that driver_info can
 461  * record quirks of specific products.
 462  */
 463 struct usb_device_id {
 464         /* which fields to match against? */
 465         u16 match_flags;
 466
 467         /* Used for product specific matches; range is inclusive */
 468         u16 idVendor;
 469         u16 idProduct;
 470         u16 bcdDevice_lo;
 471         u16 bcdDevice_hi;
 472
 473         /* Used for device class matches */
 474         u8 bDeviceClass;
 475         u8 bDeviceSubClass;
 476         u8 bDeviceProtocol;
 477
 478         /* Used for interface class matches */
 479         u8 bInterfaceClass;
 480         u8 bInterfaceSubClass;
 481         u8 bInterfaceProtocol;
 482
 483         /* Used for vendor-specific interface matches */
 484         u8 bInterfaceNumber;
 485
 486         /* not matched against */
 487         ulong driver_info;
 488 };
 489
 490 /* Some useful macros to use to create struct usb_device_id */
 491 #define USB_DEVICE_ID_MATCH_VENDOR              0x0001
 492 #define USB_DEVICE_ID_MATCH_PRODUCT             0x0002
 493 #define USB_DEVICE_ID_MATCH_DEV_LO              0x0004
 494 #define USB_DEVICE_ID_MATCH_DEV_HI              0x0008
 495 #define USB_DEVICE_ID_MATCH_DEV_CLASS           0x0010
 496 #define USB_DEVICE_ID_MATCH_DEV_SUBCLASS        0x0020
 497 #define USB_DEVICE_ID_MATCH_DEV_PROTOCOL        0x0040
 498 #define USB_DEVICE_ID_MATCH_INT_CLASS           0x0080
 499 #define USB_DEVICE_ID_MATCH_INT_SUBCLASS        0x0100
 500 #define USB_DEVICE_ID_MATCH_INT_PROTOCOL        0x0200
 501 #define USB_DEVICE_ID_MATCH_INT_NUMBER          0x0400
 502
 503 /* Match anything, indicates this is a valid entry even if everything is 0 */
 504 #define USB_DEVICE_ID_MATCH_NONE                0x0800
 505 #define USB_DEVICE_ID_MATCH_ALL                 0x07ff
 506
 507 /**
 508  * struct usb_driver_entry - Matches a driver to its usb_device_ids
 509  * @compatible: Compatible string
 510  * @data: Data for this compatible string
 511  */
 512 struct usb_driver_entry {
 513         struct driver *driver;
 514         const struct usb_device_id *match;
 515 };
 516
 517 #define USB_DEVICE(__name, __match)                                     \
 518         ll_entry_declare(struct usb_driver_entry, __name, usb_driver_entry) = {\
 519                 .driver = llsym(struct driver, __name, driver), \
 520                 .match = __match, \
 521                 }
 522
 523 /*************************************************************************
 524  * Hub Stuff
 525  */
 526 struct usb_port_status {
 527         unsigned short wPortStatus;
 528         unsigned short wPortChange;
 529 } __attribute__ ((packed));
 530
 531 struct usb_hub_status {
 532         unsigned short wHubStatus;
 533         unsigned short wHubChange;
 534 } __attribute__ ((packed));
 535
 536
 537 /* Hub descriptor */
 538 struct usb_hub_descriptor {
 539         unsigned char  bLength;
 540         unsigned char  bDescriptorType;
 541         unsigned char  bNbrPorts;
 542         unsigned short wHubCharacteristics;
 543         unsigned char  bPwrOn2PwrGood;
 544         unsigned char  bHubContrCurrent;
 545         unsigned char  DeviceRemovable[(USB_MAXCHILDREN+1+7)/8];
 546         unsigned char  PortPowerCtrlMask[(USB_MAXCHILDREN+1+7)/8];
 547         /* DeviceRemovable and PortPwrCtrlMask want to be variable-length
 548            bitmaps that hold max 255 entries. (bit0 is ignored) */
 549 } __attribute__ ((packed));
 550
 551
 552 struct usb_hub_device {
 553         struct usb_device *pusb_dev;
 554         struct usb_hub_descriptor desc;
 555 };
 556
 557 #ifdef CONFIG_DM_USB
 558 /**
 559  * struct usb_platdata - Platform data about a USB controller
 560  *
 561  * Given a USB controller (UCLASS_USB) dev this is dev_get_platdata(dev)
 562  */
 563 struct usb_platdata {
 564         enum usb_init_type init_type;
 565 };
 566
 567 /**
 568  * struct usb_dev_platdata - Platform data about a USB device
 569  *
 570  * Given a USB device dev this structure is dev_get_parent_platdata(dev).
 571  * This is used by sandbox to provide emulation data also.
 572  *
 573  * @id:         ID used to match this device
 574  * @speed:      Stores the speed associated with a USB device
 575  * @devnum:     Device address on the USB bus
 576  * @slot_id:    USB3 slot ID, which is separate from the device address
 577  * @portnr:     Port number of this device on its parent hub, numbered from 1
 578  *              (0 mean this device is the root hub)
 579  * @strings:    List of descriptor strings (for sandbox emulation purposes)
 580  * @desc_list:  List of descriptors (for sandbox emulation purposes)
 581  */
 582 struct usb_dev_platdata {
 583         struct usb_device_id id;
 584         enum usb_device_speed speed;
 585         int devnum;
 586         int slot_id;
 587         int portnr;     /* Hub port number, 1..n */
 588 #ifdef CONFIG_SANDBOX
 589         struct usb_string *strings;
 590         /* NULL-terminated list of descriptor pointers */
 591         struct usb_generic_descriptor **desc_list;
 592 #endif
 593         int configno;
 594 };
 595
 596 /**
 597  * struct usb_bus_priv - information about the USB controller
 598  *
 599  * Given a USB controller (UCLASS_USB) 'dev', this is
 600  * dev_get_uclass_priv(dev).
 601  *
 602  * @next_addr:  Next device address to allocate minus 1. Incremented by 1
 603  *              each time a new device address is set, so this holds the
 604  *              number of devices on the bus
 605  * @desc_before_addr:   true if we can read a device descriptor before it
 606  *              has been assigned an address. For XHCI this is not possible
 607  *              so this will be false.
 608  */
 609 struct usb_bus_priv {
 610         int next_addr;
 611         bool desc_before_addr;
 612 };
 613
 614 /**
 615  * struct dm_usb_ops - USB controller operations
 616  *
 617  * This defines the operations supoorted on a USB controller. Common
 618  * arguments are:
 619  *
 620  * @bus:        USB bus (i.e. controller), which is in UCLASS_USB.
 621  * @udev:       USB device parent data. Controllers are not expected to need
 622  *              this, since the device address on the bus is encoded in @pipe.
 623  *              It is used for sandbox, and can be handy for debugging and
 624  *              logging.
 625  * @pipe:       An assortment of bitfields which provide address and packet
 626  *              type information. See create_pipe() above for encoding
 627  *              details
 628  * @buffer:     A buffer to use for sending/receiving. This should be
 629  *              DMA-aligned.
 630  * @length:     Buffer length in bytes
 631  */
 632 struct dm_usb_ops {
 633         /**
 634          * control() - Send a control message
 635          *
 636          * Most parameters are as above.
 637          *
 638          * @setup: Additional setup information required by the message
 639          */
 640         int (*control)(struct udevice *bus, struct usb_device *udev,
 641                        unsigned long pipe, void *buffer, int length,
 642                        struct devrequest *setup);
 643         /**
 644          * bulk() - Send a bulk message
 645          *
 646          * Parameters are as above.
 647          */
 648         int (*bulk)(struct udevice *bus, struct usb_device *udev,
 649                     unsigned long pipe, void *buffer, int length);
 650         /**
 651          * interrupt() - Send an interrupt message
 652          *
 653          * Most parameters are as above.
 654          *
 655          * @interval: Interrupt interval
 656          */
 657         int (*interrupt)(struct udevice *bus, struct usb_device *udev,
 658                          unsigned long pipe, void *buffer, int length,
 659                          int interval);
 660         /**
 661          * alloc_device() - Allocate a new device context (XHCI)
 662          *
 663          * Before sending packets to a new device on an XHCI bus, a device
 664          * context must be created. If this method is not NULL it will be
 665          * called before the device is enumerated (even before its descriptor
 666          * is read). This should be NULL for EHCI, which does not need this.
 667          */
 668         int (*alloc_device)(struct udevice *bus, struct usb_device *udev);
 669 };
 670
 671 #define usb_get_ops(dev)        ((struct dm_usb_ops *)(dev)->driver->ops)
 672 #define usb_get_emul_ops(dev)   ((struct dm_usb_ops *)(dev)->driver->ops)
 673
 674 #ifdef CONFIG_MUSB_HOST
 675 int usb_reset_root_port(void);
 676 #endif
 677
 678 /**
 679  * usb_get_dev_index() - look up a device index number
 680  *
 681  * Look up devices using their index number (starting at 0). This works since
 682  * in U-Boot device addresses are allocated starting at 1 with no gaps.
 683  *
 684  * TODO(sjg@chromium.org): Remove this function when usb_ether.c is modified
 685  * to work better with driver model.
 686  *
 687  * @bus:        USB bus to check
 688  * @index:      Index number of device to find (0=first). This is just the
 689  *              device address less 1.
 690  */
 691 struct usb_device *usb_get_dev_index(struct udevice *bus, int index);
 692
 693 /**
 694  * usb_legacy_port_reset() - Legacy function to reset a hub port
 695  *
 696  * @hub:        Hub device
 697  * @portnr:     Port number (1=first)
 698  */
 699 int usb_legacy_port_reset(struct usb_device *hub, int portnr);
 700
 701 /**
 702  * usb_setup_device() - set up a device ready for use
 703  *
 704  * @dev:        USB device pointer. This need not be a real device - it is
 705  *              common for it to just be a local variable with its ->dev
 706  *              member (i.e. @dev->dev) set to the parent device
 707  * @do_read:    true to read the device descriptor before an address is set
 708  *              (should be false for XHCI buses, true otherwise)
 709  * @parent:     Parent device (either UCLASS_USB or UCLASS_USB_HUB)
 710  * @portnr:     Port number on hub (1=first) or 0 for none
 711  * @return 0 if OK, -ve on error */
 712 int usb_setup_device(struct usb_device *dev, bool do_read,
 713                      struct usb_device *parent, int portnr);
 714
 715 /**
 716  * usb_hub_scan() - Scan a hub and find its devices
 717  *
 718  * @hub:        Hub device to scan
 719  */
 720 int usb_hub_scan(struct udevice *hub);
 721
 722 /**
 723  * usb_scan_device() - Scan a device on a bus
 724  *
 725  * Scan a device on a bus. It has already been detected and is ready to
 726  * be enumerated. This may be either the root hub (@parent is a bus) or a
 727  * normal device (@parent is a hub)
 728  *
 729  * @parent:     Parent device
 730  * @port:       Hub port number (numbered from 1)
 731  * @speed:      USB speed to use for this device
 732  * @devp:       Returns pointer to device if all is well
 733  * @return 0 if OK, -ve on error
 734  */
 735 int usb_scan_device(struct udevice *parent, int port,
 736                     enum usb_device_speed speed, struct udevice **devp);
 737
 738 /**
 739  * usb_get_bus() - Find the bus for a device
 740  *
 741  * Search up through parents to find the bus this device is connected to. This
 742  * will be a device with uclass UCLASS_USB.
 743  *
 744  * @dev:        Device to check
 745  * @busp:       Returns bus, or NULL if not found
 746  * @return 0 if OK, -EXDEV is somehow this bus does not have a controller (this
 747  *      indicates a critical error in the USB stack
 748  */
 749 int usb_get_bus(struct udevice *dev, struct udevice **busp);
 750
 751 /**
 752  * usb_select_config() - Set up a device ready for use
 753  *
 754  * This function assumes that the device already has an address and a driver
 755  * bound, and is ready to be set up.
 756  *
 757  * This re-reads the device and configuration descriptors and sets the
 758  * configuration
 759  *
 760  * @dev:        Device to set up
 761  */
 762 int usb_select_config(struct usb_device *dev);
 763
 764 /**
 765  * usb_child_pre_probe() - Pre-probe function for USB devices
 766  *
 767  * This is called on all children of hubs and USB controllers (i.e. UCLASS_USB
 768  * and UCLASS_USB_HUB) when a new device is about to be probed. It sets up the
 769  * device from the saved platform data and calls usb_select_config() to
 770  * finish set up.
 771  *
 772  * Once this is done, the device's normal driver can take over, knowing the
 773  * device is accessible on the USB bus.
 774  *
 775  * This function is for use only by the internal USB stack.
 776  *
 777  * @dev:        Device to set up
 778  */
 779 int usb_child_pre_probe(struct udevice *dev);
 780
 781 struct ehci_ctrl;
 782
 783 /**
 784  * usb_setup_ehci_gadget() - Set up a USB device as a gadget
 785  *
 786  * TODO(sjg@chromium.org): Tidy this up when USB gadgets can use driver model
 787  *
 788  * This provides a way to tell a controller to start up as a USB device
 789  * instead of as a host. It is untested.
 790  */
 791 int usb_setup_ehci_gadget(struct ehci_ctrl **ctlrp);
 792
 793 /**
 794  * usb_stor_reset() - Prepare to scan USB storage devices
 795  *
 796  * Empty the list of USB storage devices in preparation for scanning them.
 797  * This must be called before a USB scan.
 798  */
 799 void usb_stor_reset(void);
 800
 801 #else /* !CONFIG_DM_USB */
 802
 803 struct usb_device *usb_get_dev_index(int index);
 804
 805 #endif
 806
 807 bool usb_device_has_child_on_port(struct usb_device *parent, int port);
 808
 809 int usb_hub_probe(struct usb_device *dev, int ifnum);
 810 void usb_hub_reset(void);
 811
 812 /**
 813  * legacy_hub_port_reset() - reset a port given its usb_device pointer
 814  *
 815  * Reset a hub port and see if a device is present on that port, providing
 816  * sufficient time for it to show itself. The port status is returned.
 817  *
 818  * With driver model this moves to hub_port_reset() and is passed a struct
 819  * udevice.
 820  *
 821  * @dev:        USB device to reset
 822  * @port:       Port number to reset (note ports are numbered from 0 here)
 823  * @portstat:   Returns port status
 824  */
 825 int legacy_hub_port_reset(struct usb_device *dev, int port,
 826                           unsigned short *portstat);
 827
 828 int hub_port_reset(struct udevice *dev, int port, unsigned short *portstat);
 829
 830 /**
 831  * usb_alloc_new_device() - Allocate a new device
 832  *
 833  * @devp: returns a pointer of a new device structure. With driver model this
 834  *              is a device pointer, but with legacy USB this pointer is
 835  *              driver-specific.
 836  * @return 0 if OK, -ENOSPC if we have found out of room for new devices
 837  */
 838 int usb_alloc_new_device(struct udevice *controller, struct usb_device **devp);
 839
 840 /**
 841  * usb_free_device() - Free a partially-inited device
 842  *
 843  * This is an internal function. It is used to reverse the action of
 844  * usb_alloc_new_device() when we hit a problem during init.
 845  */
 846 void usb_free_device(struct udevice *controller);
 847
 848 int usb_new_device(struct usb_device *dev);
 849
 850 int usb_alloc_device(struct usb_device *dev);
 851
 852 /**
 853  * usb_emul_setup_device() - Set up a new USB device emulation
 854  *
 855  * This is normally called when a new emulation device is bound. It tells
 856  * the USB emulation uclass about the features of the emulator.
 857  *
 858  * @dev:                Emulation device
 859  * @maxpacketsize:      Maximum packet size (e.g. PACKET_SIZE_64)
 860  * @strings:            List of USB string descriptors, terminated by a NULL
 861  *                      entry
 862  * @desc_list:          List of points or USB descriptors, terminated by NULL.
 863  *                      The first entry must be struct usb_device_descriptor,
 864  *                      and others follow on after that.
 865  * @return 0 if OK, -ve on error
 866  */
 867 int usb_emul_setup_device(struct udevice *dev, int maxpacketsize,
 868                           struct usb_string *strings, void **desc_list);
 869
 870 /**
 871  * usb_emul_control() - Send a control packet to an emulator
 872  *
 873  * @emul:       Emulator device
 874  * @udev:       USB device (which the emulator is causing to appear)
 875  * See struct dm_usb_ops for details on other parameters
 876  * @return 0 if OK, -ve on error
 877  */
 878 int usb_emul_control(struct udevice *emul, struct usb_device *udev,
 879                      unsigned long pipe, void *buffer, int length,
 880                      struct devrequest *setup);
 881
 882 /**
 883  * usb_emul_bulk() - Send a bulk packet to an emulator
 884  *
 885  * @emul:       Emulator device
 886  * @udev:       USB device (which the emulator is causing to appear)
 887  * See struct dm_usb_ops for details on other parameters
 888  * @return 0 if OK, -ve on error
 889  */
 890 int usb_emul_bulk(struct udevice *emul, struct usb_device *udev,
 891                   unsigned long pipe, void *buffer, int length);
 892
 893 /**
 894  * usb_emul_find() - Find an emulator for a particular device
 895  *
 896  * Check @pipe to find a device number on bus @bus and return it.
 897  *
 898  * @bus:        USB bus (controller)
 899  * @pipe:       Describes pipe being used, and includes the device number
 900  * @emulp:      Returns pointer to emulator, or NULL if not found
 901  * @return 0 if found, -ve on error
 902  */
 903 int usb_emul_find(struct udevice *bus, ulong pipe, struct udevice **emulp);
 904
 905 /**
 906  * usb_emul_reset() - Reset all emulators ready for use
 907  *
 908  * Clear out any address information in the emulators and make then ready for
 909  * a new USB scan
 910  */
 911 void usb_emul_reset(struct udevice *dev);
 912
 913 #endif /*_USB_H_ */