include/usb.h

   1 /*
   2  * (C) Copyright 2001
   3  * Denis Peter, MPL AG Switzerland
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  * Note: Part of this code has been derived from linux
   7  *
   8  */
   9 #ifndef _USB_H_
  10 #define _USB_H_
  11
  12 #include <usb_defs.h>
  13 #include <linux/usb/ch9.h>
  14
  15 /*
  16  * The EHCI spec says that we must align to at least 32 bytes.  However,
  17  * some platforms require larger alignment.
  18  */
  19 #if ARCH_DMA_MINALIGN > 32
  20 #define USB_DMA_MINALIGN        ARCH_DMA_MINALIGN
  21 #else
  22 #define USB_DMA_MINALIGN        32
  23 #endif
  24
  25 /* Everything is aribtrary */
  26 #define USB_ALTSETTINGALLOC             4
  27 #define USB_MAXALTSETTING               128     /* Hard limit */
  28
  29 #define USB_MAX_DEVICE                  32
  30 #define USB_MAXCONFIG                   8
  31 #define USB_MAXINTERFACES               8
  32 #define USB_MAXENDPOINTS                16
  33 #define USB_MAXCHILDREN                 8       /* This is arbitrary */
  34 #define USB_MAX_HUB                     16
  35
  36 #define USB_CNTL_TIMEOUT 100 /* 100ms timeout */
  37
  38 /*
  39  * This is the timeout to allow for submitting an urb in ms. We allow more
  40  * time for a BULK device to react - some are slow.
  41  */
  42 #define USB_TIMEOUT_MS(pipe) (usb_pipebulk(pipe) ? 5000 : 1000)
  43
  44 /* device request (setup) */
  45 struct devrequest {
  46         unsigned char   requesttype;
  47         unsigned char   request;
  48         unsigned short  value;
  49         unsigned short  index;
  50         unsigned short  length;
  51 } __attribute__ ((packed));
  52
  53 /* Interface */
  54 struct usb_interface {
  55         struct usb_interface_descriptor desc;
  56
  57         unsigned char   no_of_ep;
  58         unsigned char   num_altsetting;
  59         unsigned char   act_altsetting;
  60
  61         struct usb_endpoint_descriptor ep_desc[USB_MAXENDPOINTS];
  62         /*
  63          * Super Speed Device will have Super Speed Endpoint
  64          * Companion Descriptor  (section 9.6.7 of usb 3.0 spec)
  65          * Revision 1.0 June 6th 2011
  66          */
  67         struct usb_ss_ep_comp_descriptor ss_ep_comp_desc[USB_MAXENDPOINTS];
  68 } __attribute__ ((packed));
  69
  70 /* Configuration information.. */
  71 struct usb_config {
  72         struct usb_config_descriptor desc;
  73
  74         unsigned char   no_of_if;       /* number of interfaces */
  75         struct usb_interface if_desc[USB_MAXINTERFACES];
  76 } __attribute__ ((packed));
  77
  78 enum {
  79         /* Maximum packet size; encoded as 0,1,2,3 = 8,16,32,64 */
  80         PACKET_SIZE_8   = 0,
  81         PACKET_SIZE_16  = 1,
  82         PACKET_SIZE_32  = 2,
  83         PACKET_SIZE_64  = 3,
  84 };
  85
  86 struct usb_device {
  87         int     devnum;                 /* Device number on USB bus */
  88         int     speed;                  /* full/low/high */
  89         char    mf[32];                 /* manufacturer */
  90         char    prod[32];               /* product */
  91         char    serial[32];             /* serial number */
  92
  93         /* Maximum packet size; one of: PACKET_SIZE_* */
  94         int maxpacketsize;
  95         /* one bit for each endpoint ([0] = IN, [1] = OUT) */
  96         unsigned int toggle[2];
  97         /* endpoint halts; one bit per endpoint # & direction;
  98          * [0] = IN, [1] = OUT
  99          */
 100         unsigned int halted[2];
 101         int epmaxpacketin[16];          /* INput endpoint specific maximums */
 102         int epmaxpacketout[16];         /* OUTput endpoint specific maximums */
 103
 104         int configno;                   /* selected config number */
 105         /* Device Descriptor */
 106         struct usb_device_descriptor descriptor
 107                 __attribute__((aligned(ARCH_DMA_MINALIGN)));
 108         struct usb_config config; /* config descriptor */
 109
 110         int have_langid;                /* whether string_langid is valid yet */
 111         int string_langid;              /* language ID for strings */
 112         int (*irq_handle)(struct usb_device *dev);
 113         unsigned long irq_status;
 114         int irq_act_len;                /* transfered bytes */
 115         void *privptr;
 116         /*
 117          * Child devices -  if this is a hub device
 118          * Each instance needs its own set of data structures.
 119          */
 120         unsigned long status;
 121         int act_len;                    /* transfered bytes */
 122         int maxchild;                   /* Number of ports if hub */
 123         int portnr;
 124         struct usb_device *parent;
 125         struct usb_device *children[USB_MAXCHILDREN];
 126
 127         void *controller;               /* hardware controller private data */
 128 };
 129
 130 /**********************************************************************
 131  * this is how the lowlevel part communicate with the outer world
 132  */
 133
 134 #if defined(CONFIG_USB_UHCI) || defined(CONFIG_USB_OHCI) || \
 135         defined(CONFIG_USB_EHCI) || defined(CONFIG_USB_OHCI_NEW) || \
 136         defined(CONFIG_USB_SL811HS) || defined(CONFIG_USB_ISP116X_HCD) || \
 137         defined(CONFIG_USB_R8A66597_HCD) || defined(CONFIG_USB_DAVINCI) || \
 138         defined(CONFIG_USB_OMAP3) || defined(CONFIG_USB_DA8XX) || \
 139         defined(CONFIG_USB_BLACKFIN) || defined(CONFIG_USB_AM35X) || \
 140         defined(CONFIG_USB_MUSB_DSPS) || defined(CONFIG_USB_MUSB_AM35X) || \
 141         defined(CONFIG_USB_MUSB_OMAP2PLUS)
 142
 143 int usb_lowlevel_init(int index, void **controller);
 144 int usb_lowlevel_stop(int index);
 145
 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
 153 /* Defines */
 154 #define USB_UHCI_VEND_ID        0x8086
 155 #define USB_UHCI_DEV_ID         0x7112
 156
 157 /*
 158  * PXA25x can only act as USB device. There are drivers
 159  * which works with USB CDC gadgets implementations.
 160  * Some of them have common routines which can be used
 161  * in boards init functions e.g. udc_disconnect() used for
 162  * forced device disconnection from host.
 163  */
 164 #elif defined(CONFIG_USB_GADGET_PXA2XX)
 165
 166 extern void udc_disconnect(void);
 167
 168 #else
 169 #error USB Lowlevel not defined
 170 #endif
 171
 172 #ifdef CONFIG_USB_STORAGE
 173
 174 #define USB_MAX_STOR_DEV 5
 175 block_dev_desc_t *usb_stor_get_dev(int index);
 176 int usb_stor_scan(int mode);
 177 int usb_stor_info(void);
 178
 179 #endif
 180
 181 #ifdef CONFIG_USB_HOST_ETHER
 182
 183 #define USB_MAX_ETH_DEV 5
 184 int usb_host_eth_scan(int mode);
 185
 186 #endif
 187
 188 #ifdef CONFIG_USB_KEYBOARD
 189
 190 int drv_usb_kbd_init(void);
 191 int usb_kbd_deregister(void);
 192
 193 #endif
 194 /* routines */
 195 int usb_init(void); /* initialize the USB Controller */
 196 int usb_stop(void); /* stop the USB Controller */
 197
 198
 199 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol);
 200 int usb_set_idle(struct usb_device *dev, int ifnum, int duration,
 201                         int report_id);
 202 struct usb_device *usb_get_dev_index(int index);
 203 int usb_control_msg(struct usb_device *dev, unsigned int pipe,
 204                         unsigned char request, unsigned char requesttype,
 205                         unsigned short value, unsigned short index,
 206                         void *data, unsigned short size, int timeout);
 207 int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
 208                         void *data, int len, int *actual_length, int timeout);
 209 int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe,
 210                         void *buffer, int transfer_len, int interval);
 211 int usb_disable_asynch(int disable);
 212 int usb_maxpacket(struct usb_device *dev, unsigned long pipe);
 213 int usb_get_configuration_no(struct usb_device *dev, unsigned char *buffer,
 214                                 int cfgno);
 215 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type,
 216                         unsigned char id, void *buf, int size);
 217 int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
 218                         unsigned char type, unsigned char id, void *buf,
 219                         int size);
 220 int usb_clear_halt(struct usb_device *dev, int pipe);
 221 int usb_string(struct usb_device *dev, int index, char *buf, size_t size);
 222 int usb_set_interface(struct usb_device *dev, int interface, int alternate);
 223
 224 /* big endian -> little endian conversion */
 225 /* some CPUs are already little endian e.g. the ARM920T */
 226 #define __swap_16(x) \
 227         ({ unsigned short x_ = (unsigned short)x; \
 228          (unsigned short)( \
 229                 ((x_ & 0x00FFU) << 8) | ((x_ & 0xFF00U) >> 8)); \
 230         })
 231 #define __swap_32(x) \
 232         ({ unsigned long x_ = (unsigned long)x; \
 233          (unsigned long)( \
 234                 ((x_ & 0x000000FFUL) << 24) | \
 235                 ((x_ & 0x0000FF00UL) <<  8) | \
 236                 ((x_ & 0x00FF0000UL) >>  8) | \
 237                 ((x_ & 0xFF000000UL) >> 24)); \
 238         })
 239
 240 #ifdef __LITTLE_ENDIAN
 241 # define swap_16(x) (x)
 242 # define swap_32(x) (x)
 243 #else
 244 # define swap_16(x) __swap_16(x)
 245 # define swap_32(x) __swap_32(x)
 246 #endif
 247
 248 /*
 249  * Calling this entity a "pipe" is glorifying it. A USB pipe
 250  * is something embarrassingly simple: it basically consists
 251  * of the following information:
 252  *  - device number (7 bits)
 253  *  - endpoint number (4 bits)
 254  *  - current Data0/1 state (1 bit)
 255  *  - direction (1 bit)
 256  *  - speed (2 bits)
 257  *  - max packet size (2 bits: 8, 16, 32 or 64)
 258  *  - pipe type (2 bits: control, interrupt, bulk, isochronous)
 259  *
 260  * That's 18 bits. Really. Nothing more. And the USB people have
 261  * documented these eighteen bits as some kind of glorious
 262  * virtual data structure.
 263  *
 264  * Let's not fall in that trap. We'll just encode it as a simple
 265  * unsigned int. The encoding is:
 266  *
 267  *  - max size:         bits 0-1        (00 = 8, 01 = 16, 10 = 32, 11 = 64)
 268  *  - direction:        bit 7           (0 = Host-to-Device [Out],
 269  *                                      (1 = Device-to-Host [In])
 270  *  - device:           bits 8-14
 271  *  - endpoint:         bits 15-18
 272  *  - Data0/1:          bit 19
 273  *  - pipe type:        bits 30-31      (00 = isochronous, 01 = interrupt,
 274  *                                       10 = control, 11 = bulk)
 275  *
 276  * Why? Because it's arbitrary, and whatever encoding we select is really
 277  * up to us. This one happens to share a lot of bit positions with the UHCI
 278  * specification, so that much of the uhci driver can just mask the bits
 279  * appropriately.
 280  */
 281 /* Create various pipes... */
 282 #define create_pipe(dev,endpoint) \
 283                 (((dev)->devnum << 8) | ((endpoint) << 15) | \
 284                 (dev)->maxpacketsize)
 285 #define default_pipe(dev) ((dev)->speed << 26)
 286
 287 #define usb_sndctrlpipe(dev, endpoint)  ((PIPE_CONTROL << 30) | \
 288                                          create_pipe(dev, endpoint))
 289 #define usb_rcvctrlpipe(dev, endpoint)  ((PIPE_CONTROL << 30) | \
 290                                          create_pipe(dev, endpoint) | \
 291                                          USB_DIR_IN)
 292 #define usb_sndisocpipe(dev, endpoint)  ((PIPE_ISOCHRONOUS << 30) | \
 293                                          create_pipe(dev, endpoint))
 294 #define usb_rcvisocpipe(dev, endpoint)  ((PIPE_ISOCHRONOUS << 30) | \
 295                                          create_pipe(dev, endpoint) | \
 296                                          USB_DIR_IN)
 297 #define usb_sndbulkpipe(dev, endpoint)  ((PIPE_BULK << 30) | \
 298                                          create_pipe(dev, endpoint))
 299 #define usb_rcvbulkpipe(dev, endpoint)  ((PIPE_BULK << 30) | \
 300                                          create_pipe(dev, endpoint) | \
 301                                          USB_DIR_IN)
 302 #define usb_sndintpipe(dev, endpoint)   ((PIPE_INTERRUPT << 30) | \
 303                                          create_pipe(dev, endpoint))
 304 #define usb_rcvintpipe(dev, endpoint)   ((PIPE_INTERRUPT << 30) | \
 305                                          create_pipe(dev, endpoint) | \
 306                                          USB_DIR_IN)
 307 #define usb_snddefctrl(dev)             ((PIPE_CONTROL << 30) | \
 308                                          default_pipe(dev))
 309 #define usb_rcvdefctrl(dev)             ((PIPE_CONTROL << 30) | \
 310                                          default_pipe(dev) | \
 311                                          USB_DIR_IN)
 312
 313 /* The D0/D1 toggle bits */
 314 #define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> ep) & 1)
 315 #define usb_dotoggle(dev, ep, out)  ((dev)->toggle[out] ^= (1 << ep))
 316 #define usb_settoggle(dev, ep, out, bit) ((dev)->toggle[out] = \
 317                                                 ((dev)->toggle[out] & \
 318                                                  ~(1 << ep)) | ((bit) << ep))
 319
 320 /* Endpoint halt control/status */
 321 #define usb_endpoint_out(ep_dir)        (((ep_dir >> 7) & 1) ^ 1)
 322 #define usb_endpoint_halt(dev, ep, out) ((dev)->halted[out] |= (1 << (ep)))
 323 #define usb_endpoint_running(dev, ep, out) ((dev)->halted[out] &= ~(1 << (ep)))
 324 #define usb_endpoint_halted(dev, ep, out) ((dev)->halted[out] & (1 << (ep)))
 325
 326 #define usb_packetid(pipe)      (((pipe) & USB_DIR_IN) ? USB_PID_IN : \
 327                                  USB_PID_OUT)
 328
 329 #define usb_pipeout(pipe)       ((((pipe) >> 7) & 1) ^ 1)
 330 #define usb_pipein(pipe)        (((pipe) >> 7) & 1)
 331 #define usb_pipedevice(pipe)    (((pipe) >> 8) & 0x7f)
 332 #define usb_pipe_endpdev(pipe)  (((pipe) >> 8) & 0x7ff)
 333 #define usb_pipeendpoint(pipe)  (((pipe) >> 15) & 0xf)
 334 #define usb_pipedata(pipe)      (((pipe) >> 19) & 1)
 335 #define usb_pipetype(pipe)      (((pipe) >> 30) & 3)
 336 #define usb_pipeisoc(pipe)      (usb_pipetype((pipe)) == PIPE_ISOCHRONOUS)
 337 #define usb_pipeint(pipe)       (usb_pipetype((pipe)) == PIPE_INTERRUPT)
 338 #define usb_pipecontrol(pipe)   (usb_pipetype((pipe)) == PIPE_CONTROL)
 339 #define usb_pipebulk(pipe)      (usb_pipetype((pipe)) == PIPE_BULK)
 340
 341
 342 /*************************************************************************
 343  * Hub Stuff
 344  */
 345 struct usb_port_status {
 346         unsigned short wPortStatus;
 347         unsigned short wPortChange;
 348 } __attribute__ ((packed));
 349
 350 struct usb_hub_status {
 351         unsigned short wHubStatus;
 352         unsigned short wHubChange;
 353 } __attribute__ ((packed));
 354
 355
 356 /* Hub descriptor */
 357 struct usb_hub_descriptor {
 358         unsigned char  bLength;
 359         unsigned char  bDescriptorType;
 360         unsigned char  bNbrPorts;
 361         unsigned short wHubCharacteristics;
 362         unsigned char  bPwrOn2PwrGood;
 363         unsigned char  bHubContrCurrent;
 364         unsigned char  DeviceRemovable[(USB_MAXCHILDREN+1+7)/8];
 365         unsigned char  PortPowerCtrlMask[(USB_MAXCHILDREN+1+7)/8];
 366         /* DeviceRemovable and PortPwrCtrlMask want to be variable-length
 367            bitmaps that hold max 255 entries. (bit0 is ignored) */
 368 } __attribute__ ((packed));
 369
 370
 371 struct usb_hub_device {
 372         struct usb_device *pusb_dev;
 373         struct usb_hub_descriptor desc;
 374 };
 375
 376 int usb_hub_probe(struct usb_device *dev, int ifnum);
 377 void usb_hub_reset(void);
 378 int hub_port_reset(struct usb_device *dev, int port,
 379                           unsigned short *portstat);
 380
 381 struct usb_device *usb_alloc_new_device(void *controller);
 382
 383 int usb_new_device(struct usb_device *dev);
 384 void usb_free_device(void);
 385
 386 #endif /*_USB_H_ */