kernel/drivers/media/usb/gspca/spca1528.c

   1 /*
   2  * spca1528 subdriver
   3  *
   4  * Copyright (C) 2010-2011 Jean-Francois Moine (http://moinejf.free.fr)
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  19  */
  20
  21 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  22
  23 #define MODULE_NAME "spca1528"
  24
  25 #include "gspca.h"
  26 #include "jpeg.h"
  27
  28 MODULE_AUTHOR("Jean-Francois Moine <http://moinejf.free.fr>");
  29 MODULE_DESCRIPTION("SPCA1528 USB Camera Driver");
  30 MODULE_LICENSE("GPL");
  31
  32 /* specific webcam descriptor */
  33 struct sd {
  34         struct gspca_dev gspca_dev;     /* !! must be the first item */
  35
  36         u8 pkt_seq;
  37
  38         u8 jpeg_hdr[JPEG_HDR_SZ];
  39 };
  40
  41 static const struct v4l2_pix_format vga_mode[] = {
  42 /*              (does not work correctly)
  43         {176, 144, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
  44                 .bytesperline = 176,
  45                 .sizeimage = 176 * 144 * 5 / 8 + 590,
  46                 .colorspace = V4L2_COLORSPACE_JPEG,
  47                 .priv = 3},
  48 */
  49         {320, 240, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
  50                 .bytesperline = 320,
  51                 .sizeimage = 320 * 240 * 4 / 8 + 590,
  52                 .colorspace = V4L2_COLORSPACE_JPEG,
  53                 .priv = 2},
  54         {640, 480, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
  55                 .bytesperline = 640,
  56                 .sizeimage = 640 * 480 * 3 / 8 + 590,
  57                 .colorspace = V4L2_COLORSPACE_JPEG,
  58                 .priv = 1},
  59 };
  60
  61 /* read <len> bytes to gspca usb_buf */
  62 static void reg_r(struct gspca_dev *gspca_dev,
  63                         u8 req,
  64                         u16 index,
  65                         int len)
  66 {
  67 #if USB_BUF_SZ < 64
  68 #error "USB buffer too small"
  69 #endif
  70         struct usb_device *dev = gspca_dev->dev;
  71         int ret;
  72
  73         if (gspca_dev->usb_err < 0)
  74                 return;
  75         ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
  76                         req,
  77                         USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  78                         0x0000,                 /* value */
  79                         index,
  80                         gspca_dev->usb_buf, len,
  81                         500);
  82         PDEBUG(D_USBI, "GET %02x 0000 %04x %02x", req, index,
  83                          gspca_dev->usb_buf[0]);
  84         if (ret < 0) {
  85                 pr_err("reg_r err %d\n", ret);
  86                 gspca_dev->usb_err = ret;
  87         }
  88 }
  89
  90 static void reg_w(struct gspca_dev *gspca_dev,
  91                         u8 req,
  92                         u16 value,
  93                         u16 index)
  94 {
  95         struct usb_device *dev = gspca_dev->dev;
  96         int ret;
  97
  98         if (gspca_dev->usb_err < 0)
  99                 return;
 100         PDEBUG(D_USBO, "SET %02x %04x %04x", req, value, index);
 101         ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 102                         req,
 103                         USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 104                         value, index,
 105                         NULL, 0, 500);
 106         if (ret < 0) {
 107                 pr_err("reg_w err %d\n", ret);
 108                 gspca_dev->usb_err = ret;
 109         }
 110 }
 111
 112 static void reg_wb(struct gspca_dev *gspca_dev,
 113                         u8 req,
 114                         u16 value,
 115                         u16 index,
 116                         u8 byte)
 117 {
 118         struct usb_device *dev = gspca_dev->dev;
 119         int ret;
 120
 121         if (gspca_dev->usb_err < 0)
 122                 return;
 123         PDEBUG(D_USBO, "SET %02x %04x %04x %02x", req, value, index, byte);
 124         gspca_dev->usb_buf[0] = byte;
 125         ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 126                         req,
 127                         USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 128                         value, index,
 129                         gspca_dev->usb_buf, 1, 500);
 130         if (ret < 0) {
 131                 pr_err("reg_w err %d\n", ret);
 132                 gspca_dev->usb_err = ret;
 133         }
 134 }
 135
 136 static void wait_status_0(struct gspca_dev *gspca_dev)
 137 {
 138         int i, w;
 139
 140         i = 16;
 141         w = 0;
 142         do {
 143                 reg_r(gspca_dev, 0x21, 0x0000, 1);
 144                 if (gspca_dev->usb_buf[0] == 0)
 145                         return;
 146                 w += 15;
 147                 msleep(w);
 148         } while (--i > 0);
 149         PERR("wait_status_0 timeout");
 150         gspca_dev->usb_err = -ETIME;
 151 }
 152
 153 static void wait_status_1(struct gspca_dev *gspca_dev)
 154 {
 155         int i;
 156
 157         i = 10;
 158         do {
 159                 reg_r(gspca_dev, 0x21, 0x0001, 1);
 160                 msleep(10);
 161                 if (gspca_dev->usb_buf[0] == 1) {
 162                         reg_wb(gspca_dev, 0x21, 0x0000, 0x0001, 0x00);
 163                         reg_r(gspca_dev, 0x21, 0x0001, 1);
 164                         return;
 165                 }
 166         } while (--i > 0);
 167         PERR("wait_status_1 timeout");
 168         gspca_dev->usb_err = -ETIME;
 169 }
 170
 171 static void setbrightness(struct gspca_dev *gspca_dev, s32 val)
 172 {
 173         reg_wb(gspca_dev, 0xc0, 0x0000, 0x00c0, val);
 174 }
 175
 176 static void setcontrast(struct gspca_dev *gspca_dev, s32 val)
 177 {
 178         reg_wb(gspca_dev, 0xc1, 0x0000, 0x00c1, val);
 179 }
 180
 181 static void sethue(struct gspca_dev *gspca_dev, s32 val)
 182 {
 183         reg_wb(gspca_dev, 0xc2, 0x0000, 0x0000, val);
 184 }
 185
 186 static void setcolor(struct gspca_dev *gspca_dev, s32 val)
 187 {
 188         reg_wb(gspca_dev, 0xc3, 0x0000, 0x00c3, val);
 189 }
 190
 191 static void setsharpness(struct gspca_dev *gspca_dev, s32 val)
 192 {
 193         reg_wb(gspca_dev, 0xc4, 0x0000, 0x00c4, val);
 194 }
 195
 196 /* this function is called at probe time */
 197 static int sd_config(struct gspca_dev *gspca_dev,
 198                         const struct usb_device_id *id)
 199 {
 200         gspca_dev->cam.cam_mode = vga_mode;
 201         gspca_dev->cam.nmodes = ARRAY_SIZE(vga_mode);
 202         gspca_dev->cam.npkt = 128; /* number of packets per ISOC message */
 203                         /*fixme: 256 in ms-win traces*/
 204
 205         return 0;
 206 }
 207
 208 /* this function is called at probe and resume time */
 209 static int sd_init(struct gspca_dev *gspca_dev)
 210 {
 211         reg_w(gspca_dev, 0x00, 0x0001, 0x2067);
 212         reg_w(gspca_dev, 0x00, 0x00d0, 0x206b);
 213         reg_w(gspca_dev, 0x00, 0x0000, 0x206c);
 214         reg_w(gspca_dev, 0x00, 0x0001, 0x2069);
 215         msleep(8);
 216         reg_w(gspca_dev, 0x00, 0x00c0, 0x206b);
 217         reg_w(gspca_dev, 0x00, 0x0000, 0x206c);
 218         reg_w(gspca_dev, 0x00, 0x0001, 0x2069);
 219
 220         reg_r(gspca_dev, 0x20, 0x0000, 1);
 221         reg_r(gspca_dev, 0x20, 0x0000, 5);
 222         reg_r(gspca_dev, 0x23, 0x0000, 64);
 223         PDEBUG(D_PROBE, "%s%s", &gspca_dev->usb_buf[0x1c],
 224                                 &gspca_dev->usb_buf[0x30]);
 225         reg_r(gspca_dev, 0x23, 0x0001, 64);
 226         return gspca_dev->usb_err;
 227 }
 228
 229 /* function called at start time before URB creation */
 230 static int sd_isoc_init(struct gspca_dev *gspca_dev)
 231 {
 232         u8 mode;
 233
 234         reg_r(gspca_dev, 0x00, 0x2520, 1);
 235         wait_status_0(gspca_dev);
 236         reg_w(gspca_dev, 0xc5, 0x0003, 0x0000);
 237         wait_status_1(gspca_dev);
 238
 239         wait_status_0(gspca_dev);
 240         mode = gspca_dev->cam.cam_mode[gspca_dev->curr_mode].priv;
 241         reg_wb(gspca_dev, 0x25, 0x0000, 0x0004, mode);
 242         reg_r(gspca_dev, 0x25, 0x0004, 1);
 243         reg_wb(gspca_dev, 0x27, 0x0000, 0x0000, 0x06);  /* 420 */
 244         reg_r(gspca_dev, 0x27, 0x0000, 1);
 245
 246 /* not useful..
 247         gspca_dev->alt = 4;             * use alternate setting 3 */
 248
 249         return gspca_dev->usb_err;
 250 }
 251
 252 /* -- start the camera -- */
 253 static int sd_start(struct gspca_dev *gspca_dev)
 254 {
 255         struct sd *sd = (struct sd *) gspca_dev;
 256
 257         /* initialize the JPEG header */
 258         jpeg_define(sd->jpeg_hdr, gspca_dev->pixfmt.height,
 259                         gspca_dev->pixfmt.width,
 260                         0x22);          /* JPEG 411 */
 261
 262         /* the JPEG quality shall be 85% */
 263         jpeg_set_qual(sd->jpeg_hdr, 85);
 264
 265         reg_r(gspca_dev, 0x00, 0x2520, 1);
 266         msleep(8);
 267
 268         /* start the capture */
 269         wait_status_0(gspca_dev);
 270         reg_w(gspca_dev, 0x31, 0x0000, 0x0004); /* start request */
 271         wait_status_1(gspca_dev);
 272         wait_status_0(gspca_dev);
 273         msleep(200);
 274
 275         sd->pkt_seq = 0;
 276         return gspca_dev->usb_err;
 277 }
 278
 279 static void sd_stopN(struct gspca_dev *gspca_dev)
 280 {
 281         /* stop the capture */
 282         wait_status_0(gspca_dev);
 283         reg_w(gspca_dev, 0x31, 0x0000, 0x0000); /* stop request */
 284         wait_status_1(gspca_dev);
 285         wait_status_0(gspca_dev);
 286 }
 287
 288 /* move a packet adding 0x00 after 0xff */
 289 static void add_packet(struct gspca_dev *gspca_dev,
 290                         u8 *data,
 291                         int len)
 292 {
 293         int i;
 294
 295         i = 0;
 296         do {
 297                 if (data[i] == 0xff) {
 298                         gspca_frame_add(gspca_dev, INTER_PACKET,
 299                                         data, i + 1);
 300                         len -= i;
 301                         data += i;
 302                         *data = 0x00;
 303                         i = 0;
 304                 }
 305         } while (++i < len);
 306         gspca_frame_add(gspca_dev, INTER_PACKET, data, len);
 307 }
 308
 309 static void sd_pkt_scan(struct gspca_dev *gspca_dev,
 310                         u8 *data,                       /* isoc packet */
 311                         int len)                        /* iso packet length */
 312 {
 313         struct sd *sd = (struct sd *) gspca_dev;
 314         static const u8 ffd9[] = {0xff, 0xd9};
 315
 316         /* image packets start with:
 317          *      02 8n
 318          * with <n> bit:
 319          *      0x01: even (0) / odd (1) image
 320          *      0x02: end of image when set
 321          */
 322         if (len < 3)
 323                 return;                         /* empty packet */
 324         if (*data == 0x02) {
 325                 if (data[1] & 0x02) {
 326                         sd->pkt_seq = !(data[1] & 1);
 327                         add_packet(gspca_dev, data + 2, len - 2);
 328                         gspca_frame_add(gspca_dev, LAST_PACKET,
 329                                         ffd9, 2);
 330                         return;
 331                 }
 332                 if ((data[1] & 1) != sd->pkt_seq)
 333                         goto err;
 334                 if (gspca_dev->last_packet_type == LAST_PACKET)
 335                         gspca_frame_add(gspca_dev, FIRST_PACKET,
 336                                         sd->jpeg_hdr, JPEG_HDR_SZ);
 337                 add_packet(gspca_dev, data + 2, len - 2);
 338                 return;
 339         }
 340 err:
 341         gspca_dev->last_packet_type = DISCARD_PACKET;
 342 }
 343
 344 static int sd_s_ctrl(struct v4l2_ctrl *ctrl)
 345 {
 346         struct gspca_dev *gspca_dev =
 347                 container_of(ctrl->handler, struct gspca_dev, ctrl_handler);
 348
 349         gspca_dev->usb_err = 0;
 350
 351         if (!gspca_dev->streaming)
 352                 return 0;
 353
 354         switch (ctrl->id) {
 355         case V4L2_CID_BRIGHTNESS:
 356                 setbrightness(gspca_dev, ctrl->val);
 357                 break;
 358         case V4L2_CID_CONTRAST:
 359                 setcontrast(gspca_dev, ctrl->val);
 360                 break;
 361         case V4L2_CID_HUE:
 362                 sethue(gspca_dev, ctrl->val);
 363                 break;
 364         case V4L2_CID_SATURATION:
 365                 setcolor(gspca_dev, ctrl->val);
 366                 break;
 367         case V4L2_CID_SHARPNESS:
 368                 setsharpness(gspca_dev, ctrl->val);
 369                 break;
 370         }
 371         return gspca_dev->usb_err;
 372 }
 373
 374 static const struct v4l2_ctrl_ops sd_ctrl_ops = {
 375         .s_ctrl = sd_s_ctrl,
 376 };
 377
 378 static int sd_init_controls(struct gspca_dev *gspca_dev)
 379 {
 380         struct v4l2_ctrl_handler *hdl = &gspca_dev->ctrl_handler;
 381
 382         gspca_dev->vdev.ctrl_handler = hdl;
 383         v4l2_ctrl_handler_init(hdl, 5);
 384         v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
 385                         V4L2_CID_BRIGHTNESS, 0, 255, 1, 128);
 386         v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
 387                         V4L2_CID_CONTRAST, 0, 8, 1, 1);
 388         v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
 389                         V4L2_CID_HUE, 0, 255, 1, 0);
 390         v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
 391                         V4L2_CID_SATURATION, 0, 8, 1, 1);
 392         v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
 393                         V4L2_CID_SHARPNESS, 0, 255, 1, 0);
 394
 395         if (hdl->error) {
 396                 pr_err("Could not initialize controls\n");
 397                 return hdl->error;
 398         }
 399         return 0;
 400 }
 401
 402 /* sub-driver description */
 403 static const struct sd_desc sd_desc = {
 404         .name = MODULE_NAME,
 405         .config = sd_config,
 406         .init = sd_init,
 407         .init_controls = sd_init_controls,
 408         .isoc_init = sd_isoc_init,
 409         .start = sd_start,
 410         .stopN = sd_stopN,
 411         .pkt_scan = sd_pkt_scan,
 412 };
 413
 414 /* -- module initialisation -- */
 415 static const struct usb_device_id device_table[] = {
 416         {USB_DEVICE(0x04fc, 0x1528)},
 417         {}
 418 };
 419 MODULE_DEVICE_TABLE(usb, device_table);
 420
 421 /* -- device connect -- */
 422 static int sd_probe(struct usb_interface *intf,
 423                         const struct usb_device_id *id)
 424 {
 425         /* the video interface for isochronous transfer is 1 */
 426         if (intf->cur_altsetting->desc.bInterfaceNumber != 1)
 427                 return -ENODEV;
 428
 429         return gspca_dev_probe2(intf, id, &sd_desc, sizeof(struct sd),
 430                                 THIS_MODULE);
 431 }
 432
 433 static struct usb_driver sd_driver = {
 434         .name = MODULE_NAME,
 435         .id_table = device_table,
 436         .probe = sd_probe,
 437         .disconnect = gspca_disconnect,
 438 #ifdef CONFIG_PM
 439         .suspend = gspca_suspend,
 440         .resume = gspca_resume,
 441         .reset_resume = gspca_resume,
 442 #endif
 443 };
 444
 445 module_usb_driver(sd_driver);