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 #include <usbdescriptors.h>
  31
  32 /* Everything is aribtrary */
  33 #define USB_ALTSETTINGALLOC             4
  34 #define USB_MAXALTSETTING               128     /* Hard limit */
  35
  36 #define USB_MAX_DEVICE                  32
  37 #define USB_MAXCONFIG                   8
  38 #define USB_MAXINTERFACES               8
  39 #define USB_MAXENDPOINTS                16
  40 #define USB_MAXCHILDREN                 8       /* This is arbitrary */
  41 #define USB_MAX_HUB                     16
  42
  43 #define USB_CNTL_TIMEOUT 100 /* 100ms timeout */
  44
  45 /*
  46  * This is the timeout to allow for submitting an urb in ms. We allow more
  47  * time for a BULK device to react - some are slow.
  48  */
  49 #define USB_TIMEOUT_MS(pipe) (usb_pipebulk(pipe) ? 5000 : 100)
  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 /* Interface */
  67 struct usb_interface {
  68         struct usb_interface_descriptor desc;
  69
  70         unsigned char   no_of_ep;
  71         unsigned char   num_altsetting;
  72         unsigned char   act_altsetting;
  73
  74         struct usb_endpoint_descriptor ep_desc[USB_MAXENDPOINTS];
  75 } __attribute__ ((packed));
  76
  77 /* Configuration information.. */
  78 struct usb_config {
  79         struct usb_configuration_descriptor desc;
  80
  81         unsigned char   no_of_if;       /* number of interfaces */
  82         struct usb_interface if_desc[USB_MAXINTERFACES];
  83 } __attribute__ ((packed));
  84
  85 enum {
  86         /* Maximum packet size; encoded as 0,1,2,3 = 8,16,32,64 */
  87         PACKET_SIZE_8   = 0,
  88         PACKET_SIZE_16  = 1,
  89         PACKET_SIZE_32  = 2,
  90         PACKET_SIZE_64  = 3,
  91 };
  92
  93 struct usb_device {
  94         int     devnum;                 /* Device number on USB bus */
  95         int     speed;                  /* full/low/high */
  96         char    mf[32];                 /* manufacturer */
  97         char    prod[32];               /* product */
  98         char    serial[32];             /* serial number */
  99
 100         /* Maximum packet size; one of: PACKET_SIZE_* */
 101         int maxpacketsize;
 102         /* one bit for each endpoint ([0] = IN, [1] = OUT) */
 103         unsigned int toggle[2];
 104         /* endpoint halts; one bit per endpoint # & direction;
 105          * [0] = IN, [1] = OUT
 106          */
 107         unsigned int halted[2];
 108         int epmaxpacketin[16];          /* INput endpoint specific maximums */
 109         int epmaxpacketout[16];         /* OUTput endpoint specific maximums */
 110
 111         int configno;                   /* selected config number */
 112         struct usb_device_descriptor descriptor; /* Device Descriptor */
 113         struct usb_config config; /* config descriptor */
 114
 115         int have_langid;                /* whether string_langid is valid yet */
 116         int string_langid;              /* language ID for strings */
 117         int (*irq_handle)(struct usb_device *dev);
 118         unsigned long irq_status;
 119         int irq_act_len;                /* transfered bytes */
 120         void *privptr;
 121         /*
 122          * Child devices -  if this is a hub device
 123          * Each instance needs its own set of data structures.
 124          */
 125         unsigned long status;
 126         int act_len;                    /* transfered bytes */
 127         int maxchild;                   /* Number of ports if hub */
 128         int portnr;
 129         struct usb_device *parent;
 130         struct usb_device *children[USB_MAXCHILDREN];
 131 };
 132
 133 /**********************************************************************
 134  * this is how the lowlevel part communicate with the outer world
 135  */
 136
 137 #if defined(CONFIG_USB_UHCI) || defined(CONFIG_USB_OHCI) || \
 138         defined(CONFIG_USB_EHCI) || defined(CONFIG_USB_OHCI_NEW) || \
 139         defined(CONFIG_USB_SL811HS) || defined(CONFIG_USB_ISP116X_HCD) || \
 140         defined(CONFIG_USB_R8A66597_HCD) || defined(CONFIG_USB_DAVINCI) || \
 141         defined(CONFIG_USB_OMAP3) || defined(CONFIG_USB_DA8XX) || \
 142         defined(CONFIG_USB_BLACKFIN) || defined(CONFIG_USB_AM35X)
 143
 144 int usb_lowlevel_init(void);
 145 int usb_lowlevel_stop(void);
 146 int submit_bulk_msg(struct usb_device *dev, unsigned long pipe,
 147                         void *buffer, int transfer_len);
 148 int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 149                         int transfer_len, struct devrequest *setup);
 150 int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 151                         int transfer_len, int interval);
 152 void usb_event_poll(void);
 153
 154 /* Defines */
 155 #define USB_UHCI_VEND_ID        0x8086
 156 #define USB_UHCI_DEV_ID         0x7112
 157
 158 #else
 159 #error USB Lowlevel not defined
 160 #endif
 161
 162 #ifdef CONFIG_USB_STORAGE
 163
 164 #define USB_MAX_STOR_DEV 5
 165 block_dev_desc_t *usb_stor_get_dev(int index);
 166 int usb_stor_scan(int mode);
 167 int usb_stor_info(void);
 168
 169 #endif
 170
 171 #ifdef CONFIG_USB_KEYBOARD
 172
 173 int drv_usb_kbd_init(void);
 174 int usb_kbd_deregister(void);
 175
 176 #endif
 177 /* routines */
 178 int usb_init(void); /* initialize the USB Controller */
 179 int usb_stop(void); /* stop the USB Controller */
 180
 181
 182 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol);
 183 int usb_set_idle(struct usb_device *dev, int ifnum, int duration,
 184                         int report_id);
 185 struct usb_device *usb_get_dev_index(int index);
 186 int usb_control_msg(struct usb_device *dev, unsigned int pipe,
 187                         unsigned char request, unsigned char requesttype,
 188                         unsigned short value, unsigned short index,
 189                         void *data, unsigned short size, int timeout);
 190 int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
 191                         void *data, int len, int *actual_length, int timeout);
 192 int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe,
 193                         void *buffer, int transfer_len, int interval);
 194 void usb_disable_asynch(int disable);
 195 int usb_maxpacket(struct usb_device *dev, unsigned long pipe);
 196 inline void wait_ms(unsigned long ms);
 197 int usb_get_configuration_no(struct usb_device *dev, unsigned char *buffer,
 198                                 int cfgno);
 199 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type,
 200                         unsigned char id, void *buf, int size);
 201 int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
 202                         unsigned char type, unsigned char id, void *buf,
 203                         int size);
 204 int usb_clear_halt(struct usb_device *dev, int pipe);
 205 int usb_string(struct usb_device *dev, int index, char *buf, size_t size);
 206 int usb_set_interface(struct usb_device *dev, int interface, int alternate);
 207
 208 /* big endian -> little endian conversion */
 209 /* some CPUs are already little endian e.g. the ARM920T */
 210 #define __swap_16(x) \
 211         ({ unsigned short x_ = (unsigned short)x; \
 212          (unsigned short)( \
 213                 ((x_ & 0x00FFU) << 8) | ((x_ & 0xFF00U) >> 8)); \
 214         })
 215 #define __swap_32(x) \
 216         ({ unsigned long x_ = (unsigned long)x; \
 217          (unsigned long)( \
 218                 ((x_ & 0x000000FFUL) << 24) | \
 219                 ((x_ & 0x0000FF00UL) <<  8) | \
 220                 ((x_ & 0x00FF0000UL) >>  8) | \
 221                 ((x_ & 0xFF000000UL) >> 24)); \
 222         })
 223
 224 #ifdef __LITTLE_ENDIAN
 225 # define swap_16(x) (x)
 226 # define swap_32(x) (x)
 227 #else
 228 # define swap_16(x) __swap_16(x)
 229 # define swap_32(x) __swap_32(x)
 230 #endif
 231
 232 /*
 233  * Calling this entity a "pipe" is glorifying it. A USB pipe
 234  * is something embarrassingly simple: it basically consists
 235  * of the following information:
 236  *  - device number (7 bits)
 237  *  - endpoint number (4 bits)
 238  *  - current Data0/1 state (1 bit)
 239  *  - direction (1 bit)
 240  *  - speed (2 bits)
 241  *  - max packet size (2 bits: 8, 16, 32 or 64)
 242  *  - pipe type (2 bits: control, interrupt, bulk, isochronous)
 243  *
 244  * That's 18 bits. Really. Nothing more. And the USB people have
 245  * documented these eighteen bits as some kind of glorious
 246  * virtual data structure.
 247  *
 248  * Let's not fall in that trap. We'll just encode it as a simple
 249  * unsigned int. The encoding is:
 250  *
 251  *  - max size:         bits 0-1        (00 = 8, 01 = 16, 10 = 32, 11 = 64)
 252  *  - direction:        bit 7           (0 = Host-to-Device [Out],
 253  *                                      (1 = Device-to-Host [In])
 254  *  - device:           bits 8-14
 255  *  - endpoint:         bits 15-18
 256  *  - Data0/1:          bit 19
 257  *  - speed:            bit 26          (0 = Full, 1 = Low Speed, 2 = High)
 258  *  - pipe type:        bits 30-31      (00 = isochronous, 01 = interrupt,
 259  *                                       10 = control, 11 = bulk)
 260  *
 261  * Why? Because it's arbitrary, and whatever encoding we select is really
 262  * up to us. This one happens to share a lot of bit positions with the UHCI
 263  * specification, so that much of the uhci driver can just mask the bits
 264  * appropriately.
 265  */
 266 /* Create various pipes... */
 267 #define create_pipe(dev,endpoint) \
 268                 (((dev)->devnum << 8) | ((endpoint) << 15) | \
 269                 ((dev)->speed << 26) | (dev)->maxpacketsize)
 270 #define default_pipe(dev) ((dev)->speed << 26)
 271
 272 #define usb_sndctrlpipe(dev, endpoint)  ((PIPE_CONTROL << 30) | \
 273                                          create_pipe(dev, endpoint))
 274 #define usb_rcvctrlpipe(dev, endpoint)  ((PIPE_CONTROL << 30) | \
 275                                          create_pipe(dev, endpoint) | \
 276                                          USB_DIR_IN)
 277 #define usb_sndisocpipe(dev, endpoint)  ((PIPE_ISOCHRONOUS << 30) | \
 278                                          create_pipe(dev, endpoint))
 279 #define usb_rcvisocpipe(dev, endpoint)  ((PIPE_ISOCHRONOUS << 30) | \
 280                                          create_pipe(dev, endpoint) | \
 281                                          USB_DIR_IN)
 282 #define usb_sndbulkpipe(dev, endpoint)  ((PIPE_BULK << 30) | \
 283                                          create_pipe(dev, endpoint))
 284 #define usb_rcvbulkpipe(dev, endpoint)  ((PIPE_BULK << 30) | \
 285                                          create_pipe(dev, endpoint) | \
 286                                          USB_DIR_IN)
 287 #define usb_sndintpipe(dev, endpoint)   ((PIPE_INTERRUPT << 30) | \
 288                                          create_pipe(dev, endpoint))
 289 #define usb_rcvintpipe(dev, endpoint)   ((PIPE_INTERRUPT << 30) | \
 290                                          create_pipe(dev, endpoint) | \
 291                                          USB_DIR_IN)
 292 #define usb_snddefctrl(dev)             ((PIPE_CONTROL << 30) | \
 293                                          default_pipe(dev))
 294 #define usb_rcvdefctrl(dev)             ((PIPE_CONTROL << 30) | \
 295                                          default_pipe(dev) | \
 296                                          USB_DIR_IN)
 297
 298 /* The D0/D1 toggle bits */
 299 #define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> ep) & 1)
 300 #define usb_dotoggle(dev, ep, out)  ((dev)->toggle[out] ^= (1 << ep))
 301 #define usb_settoggle(dev, ep, out, bit) ((dev)->toggle[out] = \
 302                                                 ((dev)->toggle[out] & \
 303                                                  ~(1 << ep)) | ((bit) << ep))
 304
 305 /* Endpoint halt control/status */
 306 #define usb_endpoint_out(ep_dir)        (((ep_dir >> 7) & 1) ^ 1)
 307 #define usb_endpoint_halt(dev, ep, out) ((dev)->halted[out] |= (1 << (ep)))
 308 #define usb_endpoint_running(dev, ep, out) ((dev)->halted[out] &= ~(1 << (ep)))
 309 #define usb_endpoint_halted(dev, ep, out) ((dev)->halted[out] & (1 << (ep)))
 310
 311 #define usb_packetid(pipe)      (((pipe) & USB_DIR_IN) ? USB_PID_IN : \
 312                                  USB_PID_OUT)
 313
 314 #define usb_pipeout(pipe)       ((((pipe) >> 7) & 1) ^ 1)
 315 #define usb_pipein(pipe)        (((pipe) >> 7) & 1)
 316 #define usb_pipedevice(pipe)    (((pipe) >> 8) & 0x7f)
 317 #define usb_pipe_endpdev(pipe)  (((pipe) >> 8) & 0x7ff)
 318 #define usb_pipeendpoint(pipe)  (((pipe) >> 15) & 0xf)
 319 #define usb_pipedata(pipe)      (((pipe) >> 19) & 1)
 320 #define usb_pipespeed(pipe)     (((pipe) >> 26) & 3)
 321 #define usb_pipeslow(pipe)      (usb_pipespeed(pipe) == USB_SPEED_LOW)
 322 #define usb_pipetype(pipe)      (((pipe) >> 30) & 3)
 323 #define usb_pipeisoc(pipe)      (usb_pipetype((pipe)) == PIPE_ISOCHRONOUS)
 324 #define usb_pipeint(pipe)       (usb_pipetype((pipe)) == PIPE_INTERRUPT)
 325 #define usb_pipecontrol(pipe)   (usb_pipetype((pipe)) == PIPE_CONTROL)
 326 #define usb_pipebulk(pipe)      (usb_pipetype((pipe)) == PIPE_BULK)
 327
 328
 329 /*************************************************************************
 330  * Hub Stuff
 331  */
 332 struct usb_port_status {
 333         unsigned short wPortStatus;
 334         unsigned short wPortChange;
 335 } __attribute__ ((packed));
 336
 337 struct usb_hub_status {
 338         unsigned short wHubStatus;
 339         unsigned short wHubChange;
 340 } __attribute__ ((packed));
 341
 342
 343 /* Hub descriptor */
 344 struct usb_hub_descriptor {
 345         unsigned char  bLength;
 346         unsigned char  bDescriptorType;
 347         unsigned char  bNbrPorts;
 348         unsigned short wHubCharacteristics;
 349         unsigned char  bPwrOn2PwrGood;
 350         unsigned char  bHubContrCurrent;
 351         unsigned char  DeviceRemovable[(USB_MAXCHILDREN+1+7)/8];
 352         unsigned char  PortPowerCtrlMask[(USB_MAXCHILDREN+1+7)/8];
 353         /* DeviceRemovable and PortPwrCtrlMask want to be variable-length
 354            bitmaps that hold max 255 entries. (bit0 is ignored) */
 355 } __attribute__ ((packed));
 356
 357
 358 struct usb_hub_device {
 359         struct usb_device *pusb_dev;
 360         struct usb_hub_descriptor desc;
 361 };
 362
 363 #endif /*_USB_H_ */