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 <linux/usb/ch9.h>
  31
  32 /*
  33  * The EHCI spec says that we must align to at least 32 bytes.  However,
  34  * some platforms require larger alignment.
  35  */
  36 #if ARCH_DMA_MINALIGN > 32
  37 #define USB_DMA_MINALIGN        ARCH_DMA_MINALIGN
  38 #else
  39 #define USB_DMA_MINALIGN        32
  40 #endif
  41
  42 /* Everything is aribtrary */
  43 #define USB_ALTSETTINGALLOC             4
  44 #define USB_MAXALTSETTING               128     /* Hard limit */
  45
  46 #define USB_MAX_DEVICE                  32
  47 #define USB_MAXCONFIG                   8
  48 #define USB_MAXINTERFACES               8
  49 #define USB_MAXENDPOINTS                16
  50 #define USB_MAXCHILDREN                 8       /* This is arbitrary */
  51 #define USB_MAX_HUB                     16
  52
  53 #define USB_CNTL_TIMEOUT 100 /* 100ms timeout */
  54
  55 /*
  56  * This is the timeout to allow for submitting an urb in ms. We allow more
  57  * time for a BULK device to react - some are slow.
  58  */
  59 #define USB_TIMEOUT_MS(pipe) (usb_pipebulk(pipe) ? 5000 : 1000)
  60
  61 /* device request (setup) */
  62 struct devrequest {
  63         unsigned char   requesttype;
  64         unsigned char   request;
  65         unsigned short  value;
  66         unsigned short  index;
  67         unsigned short  length;
  68 } __attribute__ ((packed));
  69
  70 /* Interface */
  71 struct usb_interface {
  72         struct usb_interface_descriptor desc;
  73
  74         unsigned char   no_of_ep;
  75         unsigned char   num_altsetting;
  76         unsigned char   act_altsetting;
  77
  78         struct usb_endpoint_descriptor ep_desc[USB_MAXENDPOINTS];
  79 } __attribute__ ((packed));
  80
  81 /* Configuration information.. */
  82 struct usb_config {
  83         struct usb_config_descriptor desc;
  84
  85         unsigned char   no_of_if;       /* number of interfaces */
  86         struct usb_interface if_desc[USB_MAXINTERFACES];
  87 } __attribute__ ((packed));
  88
  89 enum {
  90         /* Maximum packet size; encoded as 0,1,2,3 = 8,16,32,64 */
  91         PACKET_SIZE_8   = 0,
  92         PACKET_SIZE_16  = 1,
  93         PACKET_SIZE_32  = 2,
  94         PACKET_SIZE_64  = 3,
  95 };
  96
  97 struct usb_device {
  98         int     devnum;                 /* Device number on USB bus */
  99         int     speed;                  /* full/low/high */
 100         char    mf[32];                 /* manufacturer */
 101         char    prod[32];               /* product */
 102         char    serial[32];             /* serial number */
 103
 104         /* Maximum packet size; one of: PACKET_SIZE_* */
 105         int maxpacketsize;
 106         /* one bit for each endpoint ([0] = IN, [1] = OUT) */
 107         unsigned int toggle[2];
 108         /* endpoint halts; one bit per endpoint # & direction;
 109          * [0] = IN, [1] = OUT
 110          */
 111         unsigned int halted[2];
 112         int epmaxpacketin[16];          /* INput endpoint specific maximums */
 113         int epmaxpacketout[16];         /* OUTput endpoint specific maximums */
 114
 115         int configno;                   /* selected config number */
 116         /* Device Descriptor */
 117         struct usb_device_descriptor descriptor
 118                 __attribute__((aligned(ARCH_DMA_MINALIGN)));
 119         struct usb_config config; /* config descriptor */
 120
 121         int have_langid;                /* whether string_langid is valid yet */
 122         int string_langid;              /* language ID for strings */
 123         int (*irq_handle)(struct usb_device *dev);
 124         unsigned long irq_status;
 125         int irq_act_len;                /* transfered bytes */
 126         void *privptr;
 127         /*
 128          * Child devices -  if this is a hub device
 129          * Each instance needs its own set of data structures.
 130          */
 131         unsigned long status;
 132         int act_len;                    /* transfered bytes */
 133         int maxchild;                   /* Number of ports if hub */
 134         int portnr;
 135         struct usb_device *parent;
 136         struct usb_device *children[USB_MAXCHILDREN];
 137
 138         void *controller;               /* hardware controller private data */
 139 };
 140
 141 /**********************************************************************
 142  * this is how the lowlevel part communicate with the outer world
 143  */
 144
 145 #if defined(CONFIG_USB_UHCI) || defined(CONFIG_USB_OHCI) || \
 146         defined(CONFIG_USB_EHCI) || defined(CONFIG_USB_OHCI_NEW) || \
 147         defined(CONFIG_USB_SL811HS) || defined(CONFIG_USB_ISP116X_HCD) || \
 148         defined(CONFIG_USB_R8A66597_HCD) || defined(CONFIG_USB_DAVINCI) || \
 149         defined(CONFIG_USB_OMAP3) || defined(CONFIG_USB_DA8XX) || \
 150         defined(CONFIG_USB_BLACKFIN) || defined(CONFIG_USB_AM35X) || \
 151         defined(CONFIG_USB_MUSB_DSPS) || defined(CONFIG_USB_MUSB_AM35X) || \
 152         defined(CONFIG_USB_MUSB_OMAP2PLUS)
 153
 154 int usb_lowlevel_init(int index, void **controller);
 155 int usb_lowlevel_stop(int index);
 156
 157 int submit_bulk_msg(struct usb_device *dev, unsigned long pipe,
 158                         void *buffer, int transfer_len);
 159 int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 160                         int transfer_len, struct devrequest *setup);
 161 int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 162                         int transfer_len, int interval);
 163
 164 /* Defines */
 165 #define USB_UHCI_VEND_ID        0x8086
 166 #define USB_UHCI_DEV_ID         0x7112
 167
 168 /*
 169  * PXA25x can only act as USB device. There are drivers
 170  * which works with USB CDC gadgets implementations.
 171  * Some of them have common routines which can be used
 172  * in boards init functions e.g. udc_disconnect() used for
 173  * forced device disconnection from host.
 174  */
 175 #elif defined(CONFIG_USB_GADGET_PXA2XX)
 176
 177 extern void udc_disconnect(void);
 178
 179 #else
 180 #error USB Lowlevel not defined
 181 #endif
 182
 183 #ifdef CONFIG_USB_STORAGE
 184
 185 #define USB_MAX_STOR_DEV 5
 186 block_dev_desc_t *usb_stor_get_dev(int index);
 187 int usb_stor_scan(int mode);
 188 int usb_stor_info(void);
 189
 190 #endif
 191
 192 #ifdef CONFIG_USB_HOST_ETHER
 193
 194 #define USB_MAX_ETH_DEV 5
 195 int usb_host_eth_scan(int mode);
 196
 197 #endif
 198
 199 #ifdef CONFIG_USB_KEYBOARD
 200
 201 int drv_usb_kbd_init(void);
 202 int usb_kbd_deregister(void);
 203
 204 #endif
 205 /* routines */
 206 int usb_init(void); /* initialize the USB Controller */
 207 int usb_stop(void); /* stop the USB Controller */
 208
 209
 210 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol);
 211 int usb_set_idle(struct usb_device *dev, int ifnum, int duration,
 212                         int report_id);
 213 struct usb_device *usb_get_dev_index(int index);
 214 int usb_control_msg(struct usb_device *dev, unsigned int pipe,
 215                         unsigned char request, unsigned char requesttype,
 216                         unsigned short value, unsigned short index,
 217                         void *data, unsigned short size, int timeout);
 218 int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
 219                         void *data, int len, int *actual_length, int timeout);
 220 int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe,
 221                         void *buffer, int transfer_len, int interval);
 222 int usb_disable_asynch(int disable);
 223 int usb_maxpacket(struct usb_device *dev, unsigned long pipe);
 224 int usb_get_configuration_no(struct usb_device *dev, unsigned char *buffer,
 225                                 int cfgno);
 226 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type,
 227                         unsigned char id, void *buf, int size);
 228 int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
 229                         unsigned char type, unsigned char id, void *buf,
 230                         int size);
 231 int usb_clear_halt(struct usb_device *dev, int pipe);
 232 int usb_string(struct usb_device *dev, int index, char *buf, size_t size);
 233 int usb_set_interface(struct usb_device *dev, int interface, int alternate);
 234
 235 /* big endian -> little endian conversion */
 236 /* some CPUs are already little endian e.g. the ARM920T */
 237 #define __swap_16(x) \
 238         ({ unsigned short x_ = (unsigned short)x; \
 239          (unsigned short)( \
 240                 ((x_ & 0x00FFU) << 8) | ((x_ & 0xFF00U) >> 8)); \
 241         })
 242 #define __swap_32(x) \
 243         ({ unsigned long x_ = (unsigned long)x; \
 244          (unsigned long)( \
 245                 ((x_ & 0x000000FFUL) << 24) | \
 246                 ((x_ & 0x0000FF00UL) <<  8) | \
 247                 ((x_ & 0x00FF0000UL) >>  8) | \
 248                 ((x_ & 0xFF000000UL) >> 24)); \
 249         })
 250
 251 #ifdef __LITTLE_ENDIAN
 252 # define swap_16(x) (x)
 253 # define swap_32(x) (x)
 254 #else
 255 # define swap_16(x) __swap_16(x)
 256 # define swap_32(x) __swap_32(x)
 257 #endif
 258
 259 /*
 260  * Calling this entity a "pipe" is glorifying it. A USB pipe
 261  * is something embarrassingly simple: it basically consists
 262  * of the following information:
 263  *  - device number (7 bits)
 264  *  - endpoint number (4 bits)
 265  *  - current Data0/1 state (1 bit)
 266  *  - direction (1 bit)
 267  *  - speed (2 bits)
 268  *  - max packet size (2 bits: 8, 16, 32 or 64)
 269  *  - pipe type (2 bits: control, interrupt, bulk, isochronous)
 270  *
 271  * That's 18 bits. Really. Nothing more. And the USB people have
 272  * documented these eighteen bits as some kind of glorious
 273  * virtual data structure.
 274  *
 275  * Let's not fall in that trap. We'll just encode it as a simple
 276  * unsigned int. The encoding is:
 277  *
 278  *  - max size:         bits 0-1        (00 = 8, 01 = 16, 10 = 32, 11 = 64)
 279  *  - direction:        bit 7           (0 = Host-to-Device [Out],
 280  *                                      (1 = Device-to-Host [In])
 281  *  - device:           bits 8-14
 282  *  - endpoint:         bits 15-18
 283  *  - Data0/1:          bit 19
 284  *  - pipe type:        bits 30-31      (00 = isochronous, 01 = interrupt,
 285  *                                       10 = control, 11 = bulk)
 286  *
 287  * Why? Because it's arbitrary, and whatever encoding we select is really
 288  * up to us. This one happens to share a lot of bit positions with the UHCI
 289  * specification, so that much of the uhci driver can just mask the bits
 290  * appropriately.
 291  */
 292 /* Create various pipes... */
 293 #define create_pipe(dev,endpoint) \
 294                 (((dev)->devnum << 8) | ((endpoint) << 15) | \
 295                 (dev)->maxpacketsize)
 296 #define default_pipe(dev) ((dev)->speed << 26)
 297
 298 #define usb_sndctrlpipe(dev, endpoint)  ((PIPE_CONTROL << 30) | \
 299                                          create_pipe(dev, endpoint))
 300 #define usb_rcvctrlpipe(dev, endpoint)  ((PIPE_CONTROL << 30) | \
 301                                          create_pipe(dev, endpoint) | \
 302                                          USB_DIR_IN)
 303 #define usb_sndisocpipe(dev, endpoint)  ((PIPE_ISOCHRONOUS << 30) | \
 304                                          create_pipe(dev, endpoint))
 305 #define usb_rcvisocpipe(dev, endpoint)  ((PIPE_ISOCHRONOUS << 30) | \
 306                                          create_pipe(dev, endpoint) | \
 307                                          USB_DIR_IN)
 308 #define usb_sndbulkpipe(dev, endpoint)  ((PIPE_BULK << 30) | \
 309                                          create_pipe(dev, endpoint))
 310 #define usb_rcvbulkpipe(dev, endpoint)  ((PIPE_BULK << 30) | \
 311                                          create_pipe(dev, endpoint) | \
 312                                          USB_DIR_IN)
 313 #define usb_sndintpipe(dev, endpoint)   ((PIPE_INTERRUPT << 30) | \
 314                                          create_pipe(dev, endpoint))
 315 #define usb_rcvintpipe(dev, endpoint)   ((PIPE_INTERRUPT << 30) | \
 316                                          create_pipe(dev, endpoint) | \
 317                                          USB_DIR_IN)
 318 #define usb_snddefctrl(dev)             ((PIPE_CONTROL << 30) | \
 319                                          default_pipe(dev))
 320 #define usb_rcvdefctrl(dev)             ((PIPE_CONTROL << 30) | \
 321                                          default_pipe(dev) | \
 322                                          USB_DIR_IN)
 323
 324 /* The D0/D1 toggle bits */
 325 #define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> ep) & 1)
 326 #define usb_dotoggle(dev, ep, out)  ((dev)->toggle[out] ^= (1 << ep))
 327 #define usb_settoggle(dev, ep, out, bit) ((dev)->toggle[out] = \
 328                                                 ((dev)->toggle[out] & \
 329                                                  ~(1 << ep)) | ((bit) << ep))
 330
 331 /* Endpoint halt control/status */
 332 #define usb_endpoint_out(ep_dir)        (((ep_dir >> 7) & 1) ^ 1)
 333 #define usb_endpoint_halt(dev, ep, out) ((dev)->halted[out] |= (1 << (ep)))
 334 #define usb_endpoint_running(dev, ep, out) ((dev)->halted[out] &= ~(1 << (ep)))
 335 #define usb_endpoint_halted(dev, ep, out) ((dev)->halted[out] & (1 << (ep)))
 336
 337 #define usb_packetid(pipe)      (((pipe) & USB_DIR_IN) ? USB_PID_IN : \
 338                                  USB_PID_OUT)
 339
 340 #define usb_pipeout(pipe)       ((((pipe) >> 7) & 1) ^ 1)
 341 #define usb_pipein(pipe)        (((pipe) >> 7) & 1)
 342 #define usb_pipedevice(pipe)    (((pipe) >> 8) & 0x7f)
 343 #define usb_pipe_endpdev(pipe)  (((pipe) >> 8) & 0x7ff)
 344 #define usb_pipeendpoint(pipe)  (((pipe) >> 15) & 0xf)
 345 #define usb_pipedata(pipe)      (((pipe) >> 19) & 1)
 346 #define usb_pipetype(pipe)      (((pipe) >> 30) & 3)
 347 #define usb_pipeisoc(pipe)      (usb_pipetype((pipe)) == PIPE_ISOCHRONOUS)
 348 #define usb_pipeint(pipe)       (usb_pipetype((pipe)) == PIPE_INTERRUPT)
 349 #define usb_pipecontrol(pipe)   (usb_pipetype((pipe)) == PIPE_CONTROL)
 350 #define usb_pipebulk(pipe)      (usb_pipetype((pipe)) == PIPE_BULK)
 351
 352
 353 /*************************************************************************
 354  * Hub Stuff
 355  */
 356 struct usb_port_status {
 357         unsigned short wPortStatus;
 358         unsigned short wPortChange;
 359 } __attribute__ ((packed));
 360
 361 struct usb_hub_status {
 362         unsigned short wHubStatus;
 363         unsigned short wHubChange;
 364 } __attribute__ ((packed));
 365
 366
 367 /* Hub descriptor */
 368 struct usb_hub_descriptor {
 369         unsigned char  bLength;
 370         unsigned char  bDescriptorType;
 371         unsigned char  bNbrPorts;
 372         unsigned short wHubCharacteristics;
 373         unsigned char  bPwrOn2PwrGood;
 374         unsigned char  bHubContrCurrent;
 375         unsigned char  DeviceRemovable[(USB_MAXCHILDREN+1+7)/8];
 376         unsigned char  PortPowerCtrlMask[(USB_MAXCHILDREN+1+7)/8];
 377         /* DeviceRemovable and PortPwrCtrlMask want to be variable-length
 378            bitmaps that hold max 255 entries. (bit0 is ignored) */
 379 } __attribute__ ((packed));
 380
 381
 382 struct usb_hub_device {
 383         struct usb_device *pusb_dev;
 384         struct usb_hub_descriptor desc;
 385 };
 386
 387 int usb_hub_probe(struct usb_device *dev, int ifnum);
 388 void usb_hub_reset(void);
 389 int hub_port_reset(struct usb_device *dev, int port,
 390                           unsigned short *portstat);
 391
 392 struct usb_device *usb_alloc_new_device(void *controller);
 393
 394 int usb_new_device(struct usb_device *dev);
 395 void usb_free_device(void);
 396
 397 #endif /*_USB_H_ */