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 /* device request (setup) */
  46 struct devrequest {
  47         unsigned char   requesttype;
  48         unsigned char   request;
  49         unsigned short  value;
  50         unsigned short  index;
  51         unsigned short  length;
  52 } __attribute__ ((packed));
  53
  54 /* All standard descriptors have these 2 fields in common */
  55 struct usb_descriptor_header {
  56         unsigned char   bLength;
  57         unsigned char   bDescriptorType;
  58 } __attribute__ ((packed));
  59
  60 /* Interface */
  61 struct usb_interface {
  62         struct usb_interface_descriptor desc;
  63
  64         unsigned char   no_of_ep;
  65         unsigned char   num_altsetting;
  66         unsigned char   act_altsetting;
  67
  68         struct usb_endpoint_descriptor ep_desc[USB_MAXENDPOINTS];
  69 } __attribute__ ((packed));
  70
  71 /* Configuration information.. */
  72 struct usb_config {
  73         struct usb_configuration_descriptor desc;
  74
  75         unsigned char   no_of_if;       /* number of interfaces */
  76         struct usb_interface if_desc[USB_MAXINTERFACES];
  77 } __attribute__ ((packed));
  78
  79 enum {
  80         /* Maximum packet size; encoded as 0,1,2,3 = 8,16,32,64 */
  81         PACKET_SIZE_8   = 0,
  82         PACKET_SIZE_16  = 1,
  83         PACKET_SIZE_32  = 2,
  84         PACKET_SIZE_64  = 3,
  85 };
  86
  87 struct usb_device {
  88         int     devnum;                 /* Device number on USB bus */
  89         int     speed;                  /* full/low/high */
  90         char    mf[32];                 /* manufacturer */
  91         char    prod[32];               /* product */
  92         char    serial[32];             /* serial number */
  93
  94         /* Maximum packet size; one of: PACKET_SIZE_* */
  95         int maxpacketsize;
  96         /* one bit for each endpoint ([0] = IN, [1] = OUT) */
  97         unsigned int toggle[2];
  98         /* endpoint halts; one bit per endpoint # & direction;
  99          * [0] = IN, [1] = OUT
 100          */
 101         unsigned int halted[2];
 102         int epmaxpacketin[16];          /* INput endpoint specific maximums */
 103         int epmaxpacketout[16];         /* OUTput endpoint specific maximums */
 104
 105         int configno;                   /* selected config number */
 106         struct usb_device_descriptor descriptor; /* Device Descriptor */
 107         struct usb_config config; /* config descriptor */
 108
 109         int have_langid;                /* whether string_langid is valid yet */
 110         int string_langid;              /* language ID for strings */
 111         int (*irq_handle)(struct usb_device *dev);
 112         unsigned long irq_status;
 113         int irq_act_len;                /* transfered bytes */
 114         void *privptr;
 115         /*
 116          * Child devices -  if this is a hub device
 117          * Each instance needs its own set of data structures.
 118          */
 119         unsigned long status;
 120         int act_len;                    /* transfered bytes */
 121         int maxchild;                   /* Number of ports if hub */
 122         int portnr;
 123         struct usb_device *parent;
 124         struct usb_device *children[USB_MAXCHILDREN];
 125 };
 126
 127 /**********************************************************************
 128  * this is how the lowlevel part communicate with the outer world
 129  */
 130
 131 #if defined(CONFIG_USB_UHCI) || defined(CONFIG_USB_OHCI) || \
 132         defined(CONFIG_USB_EHCI) || defined(CONFIG_USB_OHCI_NEW) || \
 133         defined(CONFIG_USB_SL811HS) || defined(CONFIG_USB_ISP116X_HCD) || \
 134         defined(CONFIG_USB_R8A66597_HCD) || defined(CONFIG_USB_DAVINCI) || \
 135         defined(CONFIG_USB_OMAP3)
 136
 137 int usb_lowlevel_init(void);
 138 int usb_lowlevel_stop(void);
 139 int submit_bulk_msg(struct usb_device *dev, unsigned long pipe,
 140                         void *buffer, int transfer_len);
 141 int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 142                         int transfer_len, struct devrequest *setup);
 143 int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 144                         int transfer_len, int interval);
 145 void usb_event_poll(void);
 146
 147 /* Defines */
 148 #define USB_UHCI_VEND_ID        0x8086
 149 #define USB_UHCI_DEV_ID         0x7112
 150
 151 #else
 152 #error USB Lowlevel not defined
 153 #endif
 154
 155 #ifdef CONFIG_USB_STORAGE
 156
 157 #define USB_MAX_STOR_DEV 5
 158 block_dev_desc_t *usb_stor_get_dev(int index);
 159 int usb_stor_scan(int mode);
 160 int usb_stor_info(void);
 161
 162 #endif
 163
 164 #ifdef CONFIG_USB_KEYBOARD
 165
 166 int drv_usb_kbd_init(void);
 167 int usb_kbd_deregister(void);
 168
 169 #endif
 170 /* routines */
 171 int usb_init(void); /* initialize the USB Controller */
 172 int usb_stop(void); /* stop the USB Controller */
 173
 174
 175 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol);
 176 int usb_set_idle(struct usb_device *dev, int ifnum, int duration,
 177                         int report_id);
 178 struct usb_device *usb_get_dev_index(int index);
 179 int usb_control_msg(struct usb_device *dev, unsigned int pipe,
 180                         unsigned char request, unsigned char requesttype,
 181                         unsigned short value, unsigned short index,
 182                         void *data, unsigned short size, int timeout);
 183 int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
 184                         void *data, int len, int *actual_length, int timeout);
 185 int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe,
 186                         void *buffer, int transfer_len, int interval);
 187 void usb_disable_asynch(int disable);
 188 int usb_maxpacket(struct usb_device *dev, unsigned long pipe);
 189 inline void wait_ms(unsigned long ms);
 190 int usb_get_configuration_no(struct usb_device *dev, unsigned char *buffer,
 191                                 int cfgno);
 192 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type,
 193                         unsigned char id, void *buf, int size);
 194 int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
 195                         unsigned char type, unsigned char id, void *buf,
 196                         int size);
 197 int usb_clear_halt(struct usb_device *dev, int pipe);
 198 int usb_string(struct usb_device *dev, int index, char *buf, size_t size);
 199 int usb_set_interface(struct usb_device *dev, int interface, int alternate);
 200
 201 /* big endian -> little endian conversion */
 202 /* some CPUs are already little endian e.g. the ARM920T */
 203 #define __swap_16(x) \
 204         ({ unsigned short x_ = (unsigned short)x; \
 205          (unsigned short)( \
 206                 ((x_ & 0x00FFU) << 8) | ((x_ & 0xFF00U) >> 8)); \
 207         })
 208 #define __swap_32(x) \
 209         ({ unsigned long x_ = (unsigned long)x; \
 210          (unsigned long)( \
 211                 ((x_ & 0x000000FFUL) << 24) | \
 212                 ((x_ & 0x0000FF00UL) <<  8) | \
 213                 ((x_ & 0x00FF0000UL) >>  8) | \
 214                 ((x_ & 0xFF000000UL) >> 24)); \
 215         })
 216
 217 #ifdef __LITTLE_ENDIAN
 218 # define swap_16(x) (x)
 219 # define swap_32(x) (x)
 220 #else
 221 # define swap_16(x) __swap_16(x)
 222 # define swap_32(x) __swap_32(x)
 223 #endif
 224
 225 /*
 226  * Calling this entity a "pipe" is glorifying it. A USB pipe
 227  * is something embarrassingly simple: it basically consists
 228  * of the following information:
 229  *  - device number (7 bits)
 230  *  - endpoint number (4 bits)
 231  *  - current Data0/1 state (1 bit)
 232  *  - direction (1 bit)
 233  *  - speed (2 bits)
 234  *  - max packet size (2 bits: 8, 16, 32 or 64)
 235  *  - pipe type (2 bits: control, interrupt, bulk, isochronous)
 236  *
 237  * That's 18 bits. Really. Nothing more. And the USB people have
 238  * documented these eighteen bits as some kind of glorious
 239  * virtual data structure.
 240  *
 241  * Let's not fall in that trap. We'll just encode it as a simple
 242  * unsigned int. The encoding is:
 243  *
 244  *  - max size:         bits 0-1        (00 = 8, 01 = 16, 10 = 32, 11 = 64)
 245  *  - direction:        bit 7           (0 = Host-to-Device [Out],
 246  *                                      (1 = Device-to-Host [In])
 247  *  - device:           bits 8-14
 248  *  - endpoint:         bits 15-18
 249  *  - Data0/1:          bit 19
 250  *  - speed:            bit 26          (0 = Full, 1 = Low Speed, 2 = High)
 251  *  - pipe type:        bits 30-31      (00 = isochronous, 01 = interrupt,
 252  *                                       10 = control, 11 = bulk)
 253  *
 254  * Why? Because it's arbitrary, and whatever encoding we select is really
 255  * up to us. This one happens to share a lot of bit positions with the UHCI
 256  * specification, so that much of the uhci driver can just mask the bits
 257  * appropriately.
 258  */
 259 /* Create various pipes... */
 260 #define create_pipe(dev,endpoint) \
 261                 (((dev)->devnum << 8) | (endpoint << 15) | \
 262                 ((dev)->speed << 26) | (dev)->maxpacketsize)
 263 #define default_pipe(dev) ((dev)->speed << 26)
 264
 265 #define usb_sndctrlpipe(dev, endpoint)  ((PIPE_CONTROL << 30) | \
 266                                          create_pipe(dev, endpoint))
 267 #define usb_rcvctrlpipe(dev, endpoint)  ((PIPE_CONTROL << 30) | \
 268                                          create_pipe(dev, endpoint) | \
 269                                          USB_DIR_IN)
 270 #define usb_sndisocpipe(dev, endpoint)  ((PIPE_ISOCHRONOUS << 30) | \
 271                                          create_pipe(dev, endpoint))
 272 #define usb_rcvisocpipe(dev, endpoint)  ((PIPE_ISOCHRONOUS << 30) | \
 273                                          create_pipe(dev, endpoint) | \
 274                                          USB_DIR_IN)
 275 #define usb_sndbulkpipe(dev, endpoint)  ((PIPE_BULK << 30) | \
 276                                          create_pipe(dev, endpoint))
 277 #define usb_rcvbulkpipe(dev, endpoint)  ((PIPE_BULK << 30) | \
 278                                          create_pipe(dev, endpoint) | \
 279                                          USB_DIR_IN)
 280 #define usb_sndintpipe(dev, endpoint)   ((PIPE_INTERRUPT << 30) | \
 281                                          create_pipe(dev, endpoint))
 282 #define usb_rcvintpipe(dev, endpoint)   ((PIPE_INTERRUPT << 30) | \
 283                                          create_pipe(dev, endpoint) | \
 284                                          USB_DIR_IN)
 285 #define usb_snddefctrl(dev)             ((PIPE_CONTROL << 30) | \
 286                                          default_pipe(dev))
 287 #define usb_rcvdefctrl(dev)             ((PIPE_CONTROL << 30) | \
 288                                          default_pipe(dev) | \
 289                                          USB_DIR_IN)
 290
 291 /* The D0/D1 toggle bits */
 292 #define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> ep) & 1)
 293 #define usb_dotoggle(dev, ep, out)  ((dev)->toggle[out] ^= (1 << ep))
 294 #define usb_settoggle(dev, ep, out, bit) ((dev)->toggle[out] = \
 295                                                 ((dev)->toggle[out] & \
 296                                                  ~(1 << ep)) | ((bit) << ep))
 297
 298 /* Endpoint halt control/status */
 299 #define usb_endpoint_out(ep_dir)        (((ep_dir >> 7) & 1) ^ 1)
 300 #define usb_endpoint_halt(dev, ep, out) ((dev)->halted[out] |= (1 << (ep)))
 301 #define usb_endpoint_running(dev, ep, out) ((dev)->halted[out] &= ~(1 << (ep)))
 302 #define usb_endpoint_halted(dev, ep, out) ((dev)->halted[out] & (1 << (ep)))
 303
 304 #define usb_packetid(pipe)      (((pipe) & USB_DIR_IN) ? USB_PID_IN : \
 305                                  USB_PID_OUT)
 306
 307 #define usb_pipeout(pipe)       ((((pipe) >> 7) & 1) ^ 1)
 308 #define usb_pipein(pipe)        (((pipe) >> 7) & 1)
 309 #define usb_pipedevice(pipe)    (((pipe) >> 8) & 0x7f)
 310 #define usb_pipe_endpdev(pipe)  (((pipe) >> 8) & 0x7ff)
 311 #define usb_pipeendpoint(pipe)  (((pipe) >> 15) & 0xf)
 312 #define usb_pipedata(pipe)      (((pipe) >> 19) & 1)
 313 #define usb_pipespeed(pipe)     (((pipe) >> 26) & 3)
 314 #define usb_pipeslow(pipe)      (usb_pipespeed(pipe) == USB_SPEED_LOW)
 315 #define usb_pipetype(pipe)      (((pipe) >> 30) & 3)
 316 #define usb_pipeisoc(pipe)      (usb_pipetype((pipe)) == PIPE_ISOCHRONOUS)
 317 #define usb_pipeint(pipe)       (usb_pipetype((pipe)) == PIPE_INTERRUPT)
 318 #define usb_pipecontrol(pipe)   (usb_pipetype((pipe)) == PIPE_CONTROL)
 319 #define usb_pipebulk(pipe)      (usb_pipetype((pipe)) == PIPE_BULK)
 320
 321
 322 /*************************************************************************
 323  * Hub Stuff
 324  */
 325 struct usb_port_status {
 326         unsigned short wPortStatus;
 327         unsigned short wPortChange;
 328 } __attribute__ ((packed));
 329
 330 struct usb_hub_status {
 331         unsigned short wHubStatus;
 332         unsigned short wHubChange;
 333 } __attribute__ ((packed));
 334
 335
 336 /* Hub descriptor */
 337 struct usb_hub_descriptor {
 338         unsigned char  bLength;
 339         unsigned char  bDescriptorType;
 340         unsigned char  bNbrPorts;
 341         unsigned short wHubCharacteristics;
 342         unsigned char  bPwrOn2PwrGood;
 343         unsigned char  bHubContrCurrent;
 344         unsigned char  DeviceRemovable[(USB_MAXCHILDREN+1+7)/8];
 345         unsigned char  PortPowerCtrlMask[(USB_MAXCHILDREN+1+7)/8];
 346         /* DeviceRemovable and PortPwrCtrlMask want to be variable-length
 347            bitmaps that hold max 255 entries. (bit0 is ignored) */
 348 } __attribute__ ((packed));
 349
 350
 351 struct usb_hub_device {
 352         struct usb_device *pusb_dev;
 353         struct usb_hub_descriptor desc;
 354 };
 355
 356 #endif /*_USB_H_ */