include/usb.h

   1 /*
   2  * (C) Copyright 2001
   3  * Denis Peter, MPL AG Switzerland
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  *
  23  * Note: Part of this code has been derived from linux
  24  *
  25  */
  26 #ifndef _USB_H_
  27 #define _USB_H_
  28
  29 #include <usb_defs.h>
  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 /* String descriptor */
  45 struct usb_string_descriptor {
  46         unsigned char   bLength;
  47         unsigned char   bDescriptorType;
  48         unsigned short  wData[1];
  49 } __attribute__ ((packed));
  50
  51 /* device request (setup) */
  52 struct devrequest {
  53         unsigned char   requesttype;
  54         unsigned char   request;
  55         unsigned short  value;
  56         unsigned short  index;
  57         unsigned short  length;
  58 } __attribute__ ((packed));
  59
  60 /* All standard descriptors have these 2 fields in common */
  61 struct usb_descriptor_header {
  62         unsigned char   bLength;
  63         unsigned char   bDescriptorType;
  64 } __attribute__ ((packed));
  65
  66 /* Device descriptor */
  67 struct usb_device_descriptor {
  68         unsigned char   bLength;
  69         unsigned char   bDescriptorType;
  70         unsigned short  bcdUSB;
  71         unsigned char   bDeviceClass;
  72         unsigned char   bDeviceSubClass;
  73         unsigned char   bDeviceProtocol;
  74         unsigned char   bMaxPacketSize0;
  75         unsigned short  idVendor;
  76         unsigned short  idProduct;
  77         unsigned short  bcdDevice;
  78         unsigned char   iManufacturer;
  79         unsigned char   iProduct;
  80         unsigned char   iSerialNumber;
  81         unsigned char   bNumConfigurations;
  82 } __attribute__ ((packed));
  83
  84 /* Endpoint descriptor */
  85 struct usb_endpoint_descriptor {
  86         unsigned char   bLength;
  87         unsigned char   bDescriptorType;
  88         unsigned char   bEndpointAddress;
  89         unsigned char   bmAttributes;
  90         unsigned short  wMaxPacketSize;
  91         unsigned char   bInterval;
  92         unsigned char   bRefresh;
  93         unsigned char   bSynchAddress;
  94 } __attribute__ ((packed)) __attribute__ ((aligned(2)));
  95
  96 /* Interface descriptor */
  97 struct usb_interface_descriptor {
  98         unsigned char   bLength;
  99         unsigned char   bDescriptorType;
 100         unsigned char   bInterfaceNumber;
 101         unsigned char   bAlternateSetting;
 102         unsigned char   bNumEndpoints;
 103         unsigned char   bInterfaceClass;
 104         unsigned char   bInterfaceSubClass;
 105         unsigned char   bInterfaceProtocol;
 106         unsigned char   iInterface;
 107
 108         unsigned char   no_of_ep;
 109         unsigned char   num_altsetting;
 110         unsigned char   act_altsetting;
 111
 112         struct usb_endpoint_descriptor ep_desc[USB_MAXENDPOINTS];
 113 } __attribute__ ((packed));
 114
 115
 116 /* Configuration descriptor information.. */
 117 struct usb_config_descriptor {
 118         unsigned char   bLength;
 119         unsigned char   bDescriptorType;
 120         unsigned short  wTotalLength;
 121         unsigned char   bNumInterfaces;
 122         unsigned char   bConfigurationValue;
 123         unsigned char   iConfiguration;
 124         unsigned char   bmAttributes;
 125         unsigned char   MaxPower;
 126
 127         unsigned char   no_of_if;       /* number of interfaces */
 128         struct usb_interface_descriptor if_desc[USB_MAXINTERFACES];
 129 } __attribute__ ((packed));
 130
 131 enum {
 132         /* Maximum packet size; encoded as 0,1,2,3 = 8,16,32,64 */
 133         PACKET_SIZE_8   = 0,
 134         PACKET_SIZE_16  = 1,
 135         PACKET_SIZE_32  = 2,
 136         PACKET_SIZE_64  = 3,
 137 };
 138
 139 struct usb_device {
 140         int     devnum;                 /* Device number on USB bus */
 141         int     speed;                  /* full/low/high */
 142         char    mf[32];                 /* manufacturer */
 143         char    prod[32];               /* product */
 144         char    serial[32];             /* serial number */
 145
 146         /* Maximum packet size; one of: PACKET_SIZE_* */
 147         int maxpacketsize;
 148         /* one bit for each endpoint ([0] = IN, [1] = OUT) */
 149         unsigned int toggle[2];
 150         /* endpoint halts; one bit per endpoint # & direction;
 151          * [0] = IN, [1] = OUT
 152          */
 153         unsigned int halted[2];
 154         int epmaxpacketin[16];          /* INput endpoint specific maximums */
 155         int epmaxpacketout[16];         /* OUTput endpoint specific maximums */
 156
 157         int configno;                   /* selected config number */
 158         struct usb_device_descriptor descriptor; /* Device Descriptor */
 159         struct usb_config_descriptor config; /* config descriptor */
 160
 161         int have_langid;                /* whether string_langid is valid yet */
 162         int string_langid;              /* language ID for strings */
 163         int (*irq_handle)(struct usb_device *dev);
 164         unsigned long irq_status;
 165         int irq_act_len;                /* transfered bytes */
 166         void *privptr;
 167         /*
 168          * Child devices -  if this is a hub device
 169          * Each instance needs its own set of data structures.
 170          */
 171         unsigned long status;
 172         int act_len;                    /* transfered bytes */
 173         int maxchild;                   /* Number of ports if hub */
 174         int portnr;
 175         struct usb_device *parent;
 176         struct usb_device *children[USB_MAXCHILDREN];
 177 };
 178
 179 /**********************************************************************
 180  * this is how the lowlevel part communicate with the outer world
 181  */
 182
 183 #if defined(CONFIG_USB_UHCI) || defined(CONFIG_USB_OHCI) || \
 184         defined(CONFIG_USB_EHCI) || defined(CONFIG_USB_OHCI_NEW) || \
 185         defined(CONFIG_USB_SL811HS) || defined(CONFIG_USB_ISP116X_HCD) || \
 186         defined(CONFIG_USB_R8A66597_HCD) || defined(CONFIG_USB_DAVINCI)
 187
 188 int usb_lowlevel_init(void);
 189 int usb_lowlevel_stop(void);
 190 int submit_bulk_msg(struct usb_device *dev, unsigned long pipe,
 191                         void *buffer, int transfer_len);
 192 int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 193                         int transfer_len, struct devrequest *setup);
 194 int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 195                         int transfer_len, int interval);
 196 void usb_event_poll(void);
 197
 198 /* Defines */
 199 #define USB_UHCI_VEND_ID        0x8086
 200 #define USB_UHCI_DEV_ID         0x7112
 201
 202 #else
 203 #error USB Lowlevel not defined
 204 #endif
 205
 206 #ifdef CONFIG_USB_STORAGE
 207
 208 #define USB_MAX_STOR_DEV 5
 209 block_dev_desc_t *usb_stor_get_dev(int index);
 210 int usb_stor_scan(int mode);
 211 int usb_stor_info(void);
 212
 213 #endif
 214
 215 #ifdef CONFIG_USB_KEYBOARD
 216
 217 int drv_usb_kbd_init(void);
 218 int usb_kbd_deregister(void);
 219
 220 #endif
 221 /* routines */
 222 int usb_init(void); /* initialize the USB Controller */
 223 int usb_stop(void); /* stop the USB Controller */
 224
 225
 226 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol);
 227 int usb_set_idle(struct usb_device *dev, int ifnum, int duration,
 228                         int report_id);
 229 struct usb_device *usb_get_dev_index(int index);
 230 int usb_control_msg(struct usb_device *dev, unsigned int pipe,
 231                         unsigned char request, unsigned char requesttype,
 232                         unsigned short value, unsigned short index,
 233                         void *data, unsigned short size, int timeout);
 234 int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
 235                         void *data, int len, int *actual_length, int timeout);
 236 int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe,
 237                         void *buffer, int transfer_len, int interval);
 238 void usb_disable_asynch(int disable);
 239 int usb_maxpacket(struct usb_device *dev, unsigned long pipe);
 240 inline void wait_ms(unsigned long ms);
 241 int usb_get_configuration_no(struct usb_device *dev, unsigned char *buffer,
 242                                 int cfgno);
 243 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type,
 244                         unsigned char id, void *buf, int size);
 245 int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
 246                         unsigned char type, unsigned char id, void *buf,
 247                         int size);
 248 int usb_clear_halt(struct usb_device *dev, int pipe);
 249 int usb_string(struct usb_device *dev, int index, char *buf, size_t size);
 250 int usb_set_interface(struct usb_device *dev, int interface, int alternate);
 251
 252 /* big endian -> little endian conversion */
 253 /* some CPUs are already little endian e.g. the ARM920T */
 254 #define __swap_16(x) \
 255         ({ unsigned short x_ = (unsigned short)x; \
 256          (unsigned short)( \
 257                 ((x_ & 0x00FFU) << 8) | ((x_ & 0xFF00U) >> 8)); \
 258         })
 259 #define __swap_32(x) \
 260         ({ unsigned long x_ = (unsigned long)x; \
 261          (unsigned long)( \
 262                 ((x_ & 0x000000FFUL) << 24) | \
 263                 ((x_ & 0x0000FF00UL) <<  8) | \
 264                 ((x_ & 0x00FF0000UL) >>  8) | \
 265                 ((x_ & 0xFF000000UL) >> 24)); \
 266         })
 267
 268 #ifdef __LITTLE_ENDIAN
 269 # define swap_16(x) (x)
 270 # define swap_32(x) (x)
 271 #else
 272 # define swap_16(x) __swap_16(x)
 273 # define swap_32(x) __swap_32(x)
 274 #endif
 275
 276 /*
 277  * Calling this entity a "pipe" is glorifying it. A USB pipe
 278  * is something embarrassingly simple: it basically consists
 279  * of the following information:
 280  *  - device number (7 bits)
 281  *  - endpoint number (4 bits)
 282  *  - current Data0/1 state (1 bit)
 283  *  - direction (1 bit)
 284  *  - speed (2 bits)
 285  *  - max packet size (2 bits: 8, 16, 32 or 64)
 286  *  - pipe type (2 bits: control, interrupt, bulk, isochronous)
 287  *
 288  * That's 18 bits. Really. Nothing more. And the USB people have
 289  * documented these eighteen bits as some kind of glorious
 290  * virtual data structure.
 291  *
 292  * Let's not fall in that trap. We'll just encode it as a simple
 293  * unsigned int. The encoding is:
 294  *
 295  *  - max size:         bits 0-1        (00 = 8, 01 = 16, 10 = 32, 11 = 64)
 296  *  - direction:        bit 7           (0 = Host-to-Device [Out],
 297  *                                      (1 = Device-to-Host [In])
 298  *  - device:           bits 8-14
 299  *  - endpoint:         bits 15-18
 300  *  - Data0/1:          bit 19
 301  *  - speed:            bit 26          (0 = Full, 1 = Low Speed, 2 = High)
 302  *  - pipe type:        bits 30-31      (00 = isochronous, 01 = interrupt,
 303  *                                       10 = control, 11 = bulk)
 304  *
 305  * Why? Because it's arbitrary, and whatever encoding we select is really
 306  * up to us. This one happens to share a lot of bit positions with the UHCI
 307  * specification, so that much of the uhci driver can just mask the bits
 308  * appropriately.
 309  */
 310 /* Create various pipes... */
 311 #define create_pipe(dev,endpoint) \
 312                 (((dev)->devnum << 8) | (endpoint << 15) | \
 313                 ((dev)->speed << 26) | (dev)->maxpacketsize)
 314 #define default_pipe(dev) ((dev)->speed << 26)
 315
 316 #define usb_sndctrlpipe(dev, endpoint)  ((PIPE_CONTROL << 30) | \
 317                                          create_pipe(dev, endpoint))
 318 #define usb_rcvctrlpipe(dev, endpoint)  ((PIPE_CONTROL << 30) | \
 319                                          create_pipe(dev, endpoint) | \
 320                                          USB_DIR_IN)
 321 #define usb_sndisocpipe(dev, endpoint)  ((PIPE_ISOCHRONOUS << 30) | \
 322                                          create_pipe(dev, endpoint))
 323 #define usb_rcvisocpipe(dev, endpoint)  ((PIPE_ISOCHRONOUS << 30) | \
 324                                          create_pipe(dev, endpoint) | \
 325                                          USB_DIR_IN)
 326 #define usb_sndbulkpipe(dev, endpoint)  ((PIPE_BULK << 30) | \
 327                                          create_pipe(dev, endpoint))
 328 #define usb_rcvbulkpipe(dev, endpoint)  ((PIPE_BULK << 30) | \
 329                                          create_pipe(dev, endpoint) | \
 330                                          USB_DIR_IN)
 331 #define usb_sndintpipe(dev, endpoint)   ((PIPE_INTERRUPT << 30) | \
 332                                          create_pipe(dev, endpoint))
 333 #define usb_rcvintpipe(dev, endpoint)   ((PIPE_INTERRUPT << 30) | \
 334                                          create_pipe(dev, endpoint) | \
 335                                          USB_DIR_IN)
 336 #define usb_snddefctrl(dev)             ((PIPE_CONTROL << 30) | \
 337                                          default_pipe(dev))
 338 #define usb_rcvdefctrl(dev)             ((PIPE_CONTROL << 30) | \
 339                                          default_pipe(dev) | \
 340                                          USB_DIR_IN)
 341
 342 /* The D0/D1 toggle bits */
 343 #define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> ep) & 1)
 344 #define usb_dotoggle(dev, ep, out)  ((dev)->toggle[out] ^= (1 << ep))
 345 #define usb_settoggle(dev, ep, out, bit) ((dev)->toggle[out] = \
 346                                                 ((dev)->toggle[out] & \
 347                                                  ~(1 << ep)) | ((bit) << ep))
 348
 349 /* Endpoint halt control/status */
 350 #define usb_endpoint_out(ep_dir)        (((ep_dir >> 7) & 1) ^ 1)
 351 #define usb_endpoint_halt(dev, ep, out) ((dev)->halted[out] |= (1 << (ep)))
 352 #define usb_endpoint_running(dev, ep, out) ((dev)->halted[out] &= ~(1 << (ep)))
 353 #define usb_endpoint_halted(dev, ep, out) ((dev)->halted[out] & (1 << (ep)))
 354
 355 #define usb_packetid(pipe)      (((pipe) & USB_DIR_IN) ? USB_PID_IN : \
 356                                  USB_PID_OUT)
 357
 358 #define usb_pipeout(pipe)       ((((pipe) >> 7) & 1) ^ 1)
 359 #define usb_pipein(pipe)        (((pipe) >> 7) & 1)
 360 #define usb_pipedevice(pipe)    (((pipe) >> 8) & 0x7f)
 361 #define usb_pipe_endpdev(pipe)  (((pipe) >> 8) & 0x7ff)
 362 #define usb_pipeendpoint(pipe)  (((pipe) >> 15) & 0xf)
 363 #define usb_pipedata(pipe)      (((pipe) >> 19) & 1)
 364 #define usb_pipespeed(pipe)     (((pipe) >> 26) & 3)
 365 #define usb_pipeslow(pipe)      (usb_pipespeed(pipe) == USB_SPEED_LOW)
 366 #define usb_pipetype(pipe)      (((pipe) >> 30) & 3)
 367 #define usb_pipeisoc(pipe)      (usb_pipetype((pipe)) == PIPE_ISOCHRONOUS)
 368 #define usb_pipeint(pipe)       (usb_pipetype((pipe)) == PIPE_INTERRUPT)
 369 #define usb_pipecontrol(pipe)   (usb_pipetype((pipe)) == PIPE_CONTROL)
 370 #define usb_pipebulk(pipe)      (usb_pipetype((pipe)) == PIPE_BULK)
 371
 372
 373 /*************************************************************************
 374  * Hub Stuff
 375  */
 376 struct usb_port_status {
 377         unsigned short wPortStatus;
 378         unsigned short wPortChange;
 379 } __attribute__ ((packed));
 380
 381 struct usb_hub_status {
 382         unsigned short wHubStatus;
 383         unsigned short wHubChange;
 384 } __attribute__ ((packed));
 385
 386
 387 /* Hub descriptor */
 388 struct usb_hub_descriptor {
 389         unsigned char  bLength;
 390         unsigned char  bDescriptorType;
 391         unsigned char  bNbrPorts;
 392         unsigned short wHubCharacteristics;
 393         unsigned char  bPwrOn2PwrGood;
 394         unsigned char  bHubContrCurrent;
 395         unsigned char  DeviceRemovable[(USB_MAXCHILDREN+1+7)/8];
 396         unsigned char  PortPowerCtrlMask[(USB_MAXCHILDREN+1+7)/8];
 397         /* DeviceRemovable and PortPwrCtrlMask want to be variable-length
 398            bitmaps that hold max 255 entries. (bit0 is ignored) */
 399 } __attribute__ ((packed));
 400
 401
 402 struct usb_hub_device {
 403         struct usb_device *pusb_dev;
 404         struct usb_hub_descriptor desc;
 405 };
 406
 407 #endif /*_USB_H_ */