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
  61 /* All standard descriptors have these 2 fields in common */
  62 struct usb_descriptor_header {
  63         unsigned char  bLength;
  64         unsigned char  bDescriptorType;
  65 } __attribute__ ((packed));
  66
  67 /* Device descriptor */
  68 struct usb_device_descriptor {
  69         unsigned char  bLength;
  70         unsigned char  bDescriptorType;
  71         unsigned short bcdUSB;
  72         unsigned char  bDeviceClass;
  73         unsigned char  bDeviceSubClass;
  74         unsigned char  bDeviceProtocol;
  75         unsigned char  bMaxPacketSize0;
  76         unsigned short idVendor;
  77         unsigned short idProduct;
  78         unsigned short bcdDevice;
  79         unsigned char  iManufacturer;
  80         unsigned char  iProduct;
  81         unsigned char  iSerialNumber;
  82         unsigned char  bNumConfigurations;
  83 } __attribute__ ((packed));
  84
  85
  86 /* Endpoint descriptor */
  87 struct usb_endpoint_descriptor {
  88         unsigned char  bLength;
  89         unsigned char  bDescriptorType;
  90         unsigned char  bEndpointAddress;
  91         unsigned char  bmAttributes;
  92         unsigned short wMaxPacketSize;
  93         unsigned char  bInterval;
  94         unsigned char  bRefresh;
  95         unsigned char  bSynchAddress;
  96
  97 } __attribute__ ((packed));
  98 /* Interface descriptor */
  99 struct usb_interface_descriptor {
 100         unsigned char  bLength;
 101         unsigned char  bDescriptorType;
 102         unsigned char  bInterfaceNumber;
 103         unsigned char  bAlternateSetting;
 104         unsigned char  bNumEndpoints;
 105         unsigned char  bInterfaceClass;
 106         unsigned char  bInterfaceSubClass;
 107         unsigned char  bInterfaceProtocol;
 108         unsigned char  iInterface;
 109
 110         unsigned char  no_of_ep;
 111         unsigned char  num_altsetting;
 112         unsigned char  act_altsetting;
 113         struct usb_endpoint_descriptor ep_desc[USB_MAXENDPOINTS];
 114 } __attribute__ ((packed));
 115
 116
 117 /* Configuration descriptor information.. */
 118 struct usb_config_descriptor {
 119         unsigned char  bLength;
 120         unsigned char  bDescriptorType;
 121         unsigned short wTotalLength;
 122         unsigned char  bNumInterfaces;
 123         unsigned char  bConfigurationValue;
 124         unsigned char  iConfiguration;
 125         unsigned char  bmAttributes;
 126         unsigned char  MaxPower;
 127
 128         unsigned char  no_of_if;                /* number of interfaces */
 129         struct usb_interface_descriptor if_desc[USB_MAXINTERFACES];
 130 } __attribute__ ((packed));
 131
 132
 133 struct usb_device {
 134         int devnum;                     /* Device number on USB bus */
 135         int slow;                       /* Slow device? */
 136         char mf[32];                    /* manufacturer */
 137         char prod[32];                  /* product */
 138         char serial[32];                /* serial number */
 139
 140         int maxpacketsize;              /* Maximum packet size; encoded as 0,1,2,3 = 8,16,32,64 */
 141         unsigned int toggle[2];         /* one bit for each endpoint ([0] = IN, [1] = OUT) */
 142         unsigned int halted[2];         /* endpoint halts; one bit per endpoint # & direction; */
 143                             /* [0] = IN, [1] = OUT */
 144         int epmaxpacketin[16];          /* INput endpoint specific maximums */
 145         int epmaxpacketout[16];         /* OUTput endpoint specific maximums */
 146
 147         int configno;                   /* selected config number */
 148         struct usb_device_descriptor descriptor; /* Device Descriptor */
 149         struct usb_config_descriptor config; /* config descriptor */
 150
 151         int have_langid;                /* whether string_langid is valid yet */
 152         int string_langid;              /* language ID for strings */
 153         int (*irq_handle)(struct usb_device *dev);
 154         unsigned long irq_status;
 155         int irq_act_len;                /* transfered bytes */
 156         void *privptr;
 157         /*
 158          * Child devices -  if this is a hub device
 159          * Each instance needs its own set of data structures.
 160          */
 161         unsigned long status;
 162         int act_len;                    /* transfered bytes */
 163         int maxchild;                   /* Number of ports if hub */
 164         struct usb_device *parent;
 165         struct usb_device *children[USB_MAXCHILDREN];
 166 };
 167
 168 /**********************************************************************
 169  * this is how the lowlevel part communicate with the outer world
 170  */
 171
 172 #if defined(CONFIG_USB_UHCI) || defined(CONFIG_USB_OHCI) || \
 173         defined(CONFIG_USB_OHCI_NEW) || defined (CONFIG_USB_SL811HS) || \
 174         defined(CONFIG_USB_ISP116X_HCD)
 175
 176 int usb_lowlevel_init(void);
 177 int usb_lowlevel_stop(void);
 178 int submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer,int transfer_len);
 179 int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 180                         int transfer_len,struct devrequest *setup);
 181 int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 182                         int transfer_len, int interval);
 183 void usb_event_poll(void);
 184
 185 /* Defines */
 186 #define USB_UHCI_VEND_ID 0x8086
 187 #define USB_UHCI_DEV_ID  0x7112
 188
 189 #else
 190 #error USB Lowlevel not defined
 191 #endif
 192
 193 #ifdef CONFIG_USB_STORAGE
 194
 195 #define USB_MAX_STOR_DEV 5
 196 block_dev_desc_t *usb_stor_get_dev(int index);
 197 int usb_stor_scan(int mode);
 198 int usb_stor_info(void);
 199
 200 #endif
 201
 202 #ifdef CONFIG_USB_KEYBOARD
 203
 204 int drv_usb_kbd_init(void);
 205 int usb_kbd_deregister(void);
 206
 207 #endif
 208 /* routines */
 209 int usb_init(void); /* initialize the USB Controller */
 210 int usb_stop(void); /* stop the USB Controller */
 211
 212
 213 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol);
 214 int usb_set_idle(struct usb_device *dev, int ifnum, int duration, int report_id);
 215 struct usb_device * usb_get_dev_index(int index);
 216 int usb_control_msg(struct usb_device *dev, unsigned int pipe,
 217                         unsigned char request, unsigned char requesttype,
 218                         unsigned short value, unsigned short index,
 219                         void *data, unsigned short size, int timeout);
 220 int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
 221                         void *data, int len, int *actual_length, int timeout);
 222 int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe,
 223                         void *buffer,int transfer_len, int interval);
 224 void usb_disable_asynch(int disable);
 225 int usb_maxpacket(struct usb_device *dev,unsigned long pipe);
 226 void __inline__ wait_ms(unsigned long ms);
 227 int usb_get_configuration_no(struct usb_device *dev,unsigned char *buffer,int cfgno);
 228 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type, unsigned char id, void *buf, int size);
 229 int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
 230                 unsigned char type, unsigned char id, void *buf, 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 LITTLEENDIAN
 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 /* LITTLEENDIAN */
 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 (1 bit)
 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], 1 = Device-to-Host [In])
 280  *  - device:           bits 8-14
 281  *  - endpoint:         bits 15-18
 282  *  - Data0/1:          bit 19
 283  *  - speed:            bit 26          (0 = Full, 1 = Low Speed)
 284  *  - pipe type:        bits 30-31      (00 = isochronous, 01 = interrupt, 10 = control, 11 = bulk)
 285  *
 286  * Why? Because it's arbitrary, and whatever encoding we select is really
 287  * up to us. This one happens to share a lot of bit positions with the UHCI
 288  * specification, so that much of the uhci driver can just mask the bits
 289  * appropriately.
 290  */
 291 /* Create various pipes... */
 292 #define create_pipe(dev,endpoint) \
 293                 (((dev)->devnum << 8) | (endpoint << 15) | ((dev)->slow << 26) | (dev)->maxpacketsize)
 294 #define default_pipe(dev) ((dev)->slow <<26)
 295
 296 #define usb_sndctrlpipe(dev,endpoint)   ((PIPE_CONTROL << 30) | create_pipe(dev,endpoint))
 297 #define usb_rcvctrlpipe(dev,endpoint)   ((PIPE_CONTROL << 30) | create_pipe(dev,endpoint) | USB_DIR_IN)
 298 #define usb_sndisocpipe(dev,endpoint)   ((PIPE_ISOCHRONOUS << 30) | create_pipe(dev,endpoint))
 299 #define usb_rcvisocpipe(dev,endpoint)   ((PIPE_ISOCHRONOUS << 30) | create_pipe(dev,endpoint) | USB_DIR_IN)
 300 #define usb_sndbulkpipe(dev,endpoint)   ((PIPE_BULK << 30) | create_pipe(dev,endpoint))
 301 #define usb_rcvbulkpipe(dev,endpoint)   ((PIPE_BULK << 30) | create_pipe(dev,endpoint) | USB_DIR_IN)
 302 #define usb_sndintpipe(dev,endpoint)    ((PIPE_INTERRUPT << 30) | create_pipe(dev,endpoint))
 303 #define usb_rcvintpipe(dev,endpoint)    ((PIPE_INTERRUPT << 30) | create_pipe(dev,endpoint) | USB_DIR_IN)
 304 #define usb_snddefctrl(dev)             ((PIPE_CONTROL << 30) | default_pipe(dev))
 305 #define usb_rcvdefctrl(dev)             ((PIPE_CONTROL << 30) | default_pipe(dev) | USB_DIR_IN)
 306
 307 /* The D0/D1 toggle bits */
 308 #define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> ep) & 1)
 309 #define usb_dotoggle(dev, ep, out)  ((dev)->toggle[out] ^= (1 << ep))
 310 #define usb_settoggle(dev, ep, out, bit) ((dev)->toggle[out] = ((dev)->toggle[out] & ~(1 << ep)) | ((bit) << ep))
 311
 312 /* Endpoint halt control/status */
 313 #define usb_endpoint_out(ep_dir)        (((ep_dir >> 7) & 1) ^ 1)
 314 #define usb_endpoint_halt(dev, ep, out) ((dev)->halted[out] |= (1 << (ep)))
 315 #define usb_endpoint_running(dev, ep, out) ((dev)->halted[out] &= ~(1 << (ep)))
 316 #define usb_endpoint_halted(dev, ep, out) ((dev)->halted[out] & (1 << (ep)))
 317
 318 #define usb_packetid(pipe)      (((pipe) & USB_DIR_IN) ? USB_PID_IN : USB_PID_OUT)
 319
 320 #define usb_pipeout(pipe)       ((((pipe) >> 7) & 1) ^ 1)
 321 #define usb_pipein(pipe)        (((pipe) >> 7) & 1)
 322 #define usb_pipedevice(pipe)    (((pipe) >> 8) & 0x7f)
 323 #define usb_pipe_endpdev(pipe)  (((pipe) >> 8) & 0x7ff)
 324 #define usb_pipeendpoint(pipe)  (((pipe) >> 15) & 0xf)
 325 #define usb_pipedata(pipe)      (((pipe) >> 19) & 1)
 326 #define usb_pipeslow(pipe)      (((pipe) >> 26) & 1)
 327 #define usb_pipetype(pipe)      (((pipe) >> 30) & 3)
 328 #define usb_pipeisoc(pipe)      (usb_pipetype((pipe)) == PIPE_ISOCHRONOUS)
 329 #define usb_pipeint(pipe)       (usb_pipetype((pipe)) == PIPE_INTERRUPT)
 330 #define usb_pipecontrol(pipe)   (usb_pipetype((pipe)) == PIPE_CONTROL)
 331 #define usb_pipebulk(pipe)      (usb_pipetype((pipe)) == PIPE_BULK)
 332
 333
 334 /*************************************************************************
 335  * Hub Stuff
 336  */
 337 struct usb_port_status {
 338         unsigned short wPortStatus;
 339         unsigned short wPortChange;
 340 } __attribute__ ((packed));
 341
 342 struct usb_hub_status {
 343         unsigned short wHubStatus;
 344         unsigned short wHubChange;
 345 } __attribute__ ((packed));
 346
 347
 348 /* Hub descriptor */
 349 struct usb_hub_descriptor {
 350         unsigned char  bLength;
 351         unsigned char  bDescriptorType;
 352         unsigned char  bNbrPorts;
 353         unsigned short wHubCharacteristics;
 354         unsigned char  bPwrOn2PwrGood;
 355         unsigned char  bHubContrCurrent;
 356         unsigned char  DeviceRemovable[(USB_MAXCHILDREN+1+7)/8];
 357         unsigned char  PortPowerCtrlMask[(USB_MAXCHILDREN+1+7)/8];
 358                 /* DeviceRemovable and PortPwrCtrlMask want to be variable-length
 359            bitmaps that hold max 255 entries. (bit0 is ignored) */
 360 } __attribute__ ((packed));
 361
 362
 363 struct usb_hub_device {
 364         struct usb_device *pusb_dev;
 365         struct usb_hub_descriptor desc;
 366 };
 367
 368 #endif /*_USB_H_ */