drivers/media/usb/gspca/stv0680.c

   1 /*
   2  * STV0680 USB Camera Driver
   3  *
   4  * Copyright (C) 2009 Hans de Goede <hdegoede@redhat.com>
   5  *
   6  * This module is adapted from the in kernel v4l1 stv680 driver:
   7  *
   8  *  STV0680 USB Camera Driver, by Kevin Sisson (kjsisson@bellsouth.net)
   9  *
  10  * Thanks to STMicroelectronics for information on the usb commands, and
  11  * to Steve Miller at STM for his help and encouragement while I was
  12  * writing this driver.
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2 of the License, or
  17  * (at your option) any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  27  *
  28  */
  29
  30 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  31
  32 #define MODULE_NAME "stv0680"
  33
  34 #include "gspca.h"
  35
  36 MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
  37 MODULE_DESCRIPTION("STV0680 USB Camera Driver");
  38 MODULE_LICENSE("GPL");
  39
  40 /* specific webcam descriptor */
  41 struct sd {
  42         struct gspca_dev gspca_dev;             /* !! must be the first item */
  43         struct v4l2_pix_format mode;
  44         u8 orig_mode;
  45         u8 video_mode;
  46         u8 current_mode;
  47 };
  48
  49 static int stv_sndctrl(struct gspca_dev *gspca_dev, int set, u8 req, u16 val,
  50                        int size)
  51 {
  52         int ret = -1;
  53         u8 req_type = 0;
  54         unsigned int pipe = 0;
  55
  56         switch (set) {
  57         case 0: /*  0xc1  */
  58                 req_type = USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT;
  59                 pipe = usb_rcvctrlpipe(gspca_dev->dev, 0);
  60                 break;
  61         case 1: /*  0x41  */
  62                 req_type = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT;
  63                 pipe = usb_sndctrlpipe(gspca_dev->dev, 0);
  64                 break;
  65         case 2: /*  0x80  */
  66                 req_type = USB_DIR_IN | USB_RECIP_DEVICE;
  67                 pipe = usb_rcvctrlpipe(gspca_dev->dev, 0);
  68                 break;
  69         case 3: /*  0x40  */
  70                 req_type = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE;
  71                 pipe = usb_sndctrlpipe(gspca_dev->dev, 0);
  72                 break;
  73         }
  74
  75         ret = usb_control_msg(gspca_dev->dev, pipe,
  76                               req, req_type,
  77                               val, 0, gspca_dev->usb_buf, size, 500);
  78
  79         if ((ret < 0) && (req != 0x0a))
  80                 pr_err("usb_control_msg error %i, request = 0x%x, error = %i\n",
  81                        set, req, ret);
  82
  83         return ret;
  84 }
  85
  86 static int stv0680_handle_error(struct gspca_dev *gspca_dev, int ret)
  87 {
  88         stv_sndctrl(gspca_dev, 0, 0x80, 0, 0x02); /* Get Last Error */
  89         PERR("last error: %i,  command = 0x%x",
  90                gspca_dev->usb_buf[0], gspca_dev->usb_buf[1]);
  91         return ret;
  92 }
  93
  94 static int stv0680_get_video_mode(struct gspca_dev *gspca_dev)
  95 {
  96         /* Note not sure if this init of usb_buf is really necessary */
  97         memset(gspca_dev->usb_buf, 0, 8);
  98         gspca_dev->usb_buf[0] = 0x0f;
  99
 100         if (stv_sndctrl(gspca_dev, 0, 0x87, 0, 0x08) != 0x08) {
 101                 PERR("Get_Camera_Mode failed");
 102                 return stv0680_handle_error(gspca_dev, -EIO);
 103         }
 104
 105         return gspca_dev->usb_buf[0]; /* 01 = VGA, 03 = QVGA, 00 = CIF */
 106 }
 107
 108 static int stv0680_set_video_mode(struct gspca_dev *gspca_dev, u8 mode)
 109 {
 110         struct sd *sd = (struct sd *) gspca_dev;
 111
 112         if (sd->current_mode == mode)
 113                 return 0;
 114
 115         memset(gspca_dev->usb_buf, 0, 8);
 116         gspca_dev->usb_buf[0] = mode;
 117
 118         if (stv_sndctrl(gspca_dev, 3, 0x07, 0x0100, 0x08) != 0x08) {
 119                 PERR("Set_Camera_Mode failed");
 120                 return stv0680_handle_error(gspca_dev, -EIO);
 121         }
 122
 123         /* Verify we got what we've asked for */
 124         if (stv0680_get_video_mode(gspca_dev) != mode) {
 125                 PERR("Error setting camera video mode!");
 126                 return -EIO;
 127         }
 128
 129         sd->current_mode = mode;
 130
 131         return 0;
 132 }
 133
 134 /* this function is called at probe time */
 135 static int sd_config(struct gspca_dev *gspca_dev,
 136                         const struct usb_device_id *id)
 137 {
 138         int ret;
 139         struct sd *sd = (struct sd *) gspca_dev;
 140         struct cam *cam = &gspca_dev->cam;
 141
 142         /* Give the camera some time to settle, otherwise initialization will
 143            fail on hotplug, and yes it really needs a full second. */
 144         msleep(1000);
 145
 146         /* ping camera to be sure STV0680 is present */
 147         if (stv_sndctrl(gspca_dev, 0, 0x88, 0x5678, 0x02) != 0x02 ||
 148             gspca_dev->usb_buf[0] != 0x56 || gspca_dev->usb_buf[1] != 0x78) {
 149                 PERR("STV(e): camera ping failed!!");
 150                 return stv0680_handle_error(gspca_dev, -ENODEV);
 151         }
 152
 153         /* get camera descriptor */
 154         if (stv_sndctrl(gspca_dev, 2, 0x06, 0x0200, 0x09) != 0x09)
 155                 return stv0680_handle_error(gspca_dev, -ENODEV);
 156
 157         if (stv_sndctrl(gspca_dev, 2, 0x06, 0x0200, 0x22) != 0x22 ||
 158             gspca_dev->usb_buf[7] != 0xa0 || gspca_dev->usb_buf[8] != 0x23) {
 159                 PERR("Could not get descriptor 0200.");
 160                 return stv0680_handle_error(gspca_dev, -ENODEV);
 161         }
 162         if (stv_sndctrl(gspca_dev, 0, 0x8a, 0, 0x02) != 0x02)
 163                 return stv0680_handle_error(gspca_dev, -ENODEV);
 164         if (stv_sndctrl(gspca_dev, 0, 0x8b, 0, 0x24) != 0x24)
 165                 return stv0680_handle_error(gspca_dev, -ENODEV);
 166         if (stv_sndctrl(gspca_dev, 0, 0x85, 0, 0x10) != 0x10)
 167                 return stv0680_handle_error(gspca_dev, -ENODEV);
 168
 169         if (!(gspca_dev->usb_buf[7] & 0x09)) {
 170                 PERR("Camera supports neither CIF nor QVGA mode");
 171                 return -ENODEV;
 172         }
 173         if (gspca_dev->usb_buf[7] & 0x01)
 174                 PDEBUG(D_PROBE, "Camera supports CIF mode");
 175         if (gspca_dev->usb_buf[7] & 0x02)
 176                 PDEBUG(D_PROBE, "Camera supports VGA mode");
 177         if (gspca_dev->usb_buf[7] & 0x04)
 178                 PDEBUG(D_PROBE, "Camera supports QCIF mode");
 179         if (gspca_dev->usb_buf[7] & 0x08)
 180                 PDEBUG(D_PROBE, "Camera supports QVGA mode");
 181
 182         if (gspca_dev->usb_buf[7] & 0x01)
 183                 sd->video_mode = 0x00; /* CIF */
 184         else
 185                 sd->video_mode = 0x03; /* QVGA */
 186
 187         /* FW rev, ASIC rev, sensor ID  */
 188         PDEBUG(D_PROBE, "Firmware rev is %i.%i",
 189                gspca_dev->usb_buf[0], gspca_dev->usb_buf[1]);
 190         PDEBUG(D_PROBE, "ASIC rev is %i.%i",
 191                gspca_dev->usb_buf[2], gspca_dev->usb_buf[3]);
 192         PDEBUG(D_PROBE, "Sensor ID is %i",
 193                (gspca_dev->usb_buf[4]*16) + (gspca_dev->usb_buf[5]>>4));
 194
 195
 196         ret = stv0680_get_video_mode(gspca_dev);
 197         if (ret < 0)
 198                 return ret;
 199         sd->current_mode = sd->orig_mode = ret;
 200
 201         ret = stv0680_set_video_mode(gspca_dev, sd->video_mode);
 202         if (ret < 0)
 203                 return ret;
 204
 205         /* Get mode details */
 206         if (stv_sndctrl(gspca_dev, 0, 0x8f, 0, 0x10) != 0x10)
 207                 return stv0680_handle_error(gspca_dev, -EIO);
 208
 209         cam->bulk = 1;
 210         cam->bulk_nurbs = 1; /* The cam cannot handle more */
 211         cam->bulk_size = (gspca_dev->usb_buf[0] << 24) |
 212                          (gspca_dev->usb_buf[1] << 16) |
 213                          (gspca_dev->usb_buf[2] << 8) |
 214                          (gspca_dev->usb_buf[3]);
 215         sd->mode.width = (gspca_dev->usb_buf[4] << 8) |
 216                          (gspca_dev->usb_buf[5]);  /* 322, 356, 644 */
 217         sd->mode.height = (gspca_dev->usb_buf[6] << 8) |
 218                           (gspca_dev->usb_buf[7]); /* 242, 292, 484 */
 219         sd->mode.pixelformat = V4L2_PIX_FMT_STV0680;
 220         sd->mode.field = V4L2_FIELD_NONE;
 221         sd->mode.bytesperline = sd->mode.width;
 222         sd->mode.sizeimage = cam->bulk_size;
 223         sd->mode.colorspace = V4L2_COLORSPACE_SRGB;
 224
 225         /* origGain = gspca_dev->usb_buf[12]; */
 226
 227         cam->cam_mode = &sd->mode;
 228         cam->nmodes = 1;
 229
 230
 231         ret = stv0680_set_video_mode(gspca_dev, sd->orig_mode);
 232         if (ret < 0)
 233                 return ret;
 234
 235         if (stv_sndctrl(gspca_dev, 2, 0x06, 0x0100, 0x12) != 0x12 ||
 236             gspca_dev->usb_buf[8] != 0x53 || gspca_dev->usb_buf[9] != 0x05) {
 237                 pr_err("Could not get descriptor 0100\n");
 238                 return stv0680_handle_error(gspca_dev, -EIO);
 239         }
 240
 241         return 0;
 242 }
 243
 244 /* this function is called at probe and resume time */
 245 static int sd_init(struct gspca_dev *gspca_dev)
 246 {
 247         return 0;
 248 }
 249
 250 /* -- start the camera -- */
 251 static int sd_start(struct gspca_dev *gspca_dev)
 252 {
 253         int ret;
 254         struct sd *sd = (struct sd *) gspca_dev;
 255
 256         ret = stv0680_set_video_mode(gspca_dev, sd->video_mode);
 257         if (ret < 0)
 258                 return ret;
 259
 260         if (stv_sndctrl(gspca_dev, 0, 0x85, 0, 0x10) != 0x10)
 261                 return stv0680_handle_error(gspca_dev, -EIO);
 262
 263         /* Start stream at:
 264            0x0000 = CIF (352x288)
 265            0x0100 = VGA (640x480)
 266            0x0300 = QVGA (320x240) */
 267         if (stv_sndctrl(gspca_dev, 1, 0x09, sd->video_mode << 8, 0x0) != 0x0)
 268                 return stv0680_handle_error(gspca_dev, -EIO);
 269
 270         return 0;
 271 }
 272
 273 static void sd_stopN(struct gspca_dev *gspca_dev)
 274 {
 275         /* This is a high priority command; it stops all lower order cmds */
 276         if (stv_sndctrl(gspca_dev, 1, 0x04, 0x0000, 0x0) != 0x0)
 277                 stv0680_handle_error(gspca_dev, -EIO);
 278 }
 279
 280 static void sd_stop0(struct gspca_dev *gspca_dev)
 281 {
 282         struct sd *sd = (struct sd *) gspca_dev;
 283
 284         if (!sd->gspca_dev.present)
 285                 return;
 286
 287         stv0680_set_video_mode(gspca_dev, sd->orig_mode);
 288 }
 289
 290 static void sd_pkt_scan(struct gspca_dev *gspca_dev,
 291                         u8 *data,
 292                         int len)
 293 {
 294         struct sd *sd = (struct sd *) gspca_dev;
 295
 296         /* Every now and then the camera sends a 16 byte packet, no idea
 297            what it contains, but it is not image data, when this
 298            happens the frame received before this packet is corrupt,
 299            so discard it. */
 300         if (len != sd->mode.sizeimage) {
 301                 gspca_dev->last_packet_type = DISCARD_PACKET;
 302                 return;
 303         }
 304
 305         /* Finish the previous frame, we do this upon reception of the next
 306            packet, even though it is already complete so that the strange 16
 307            byte packets send after a corrupt frame can discard it. */
 308         gspca_frame_add(gspca_dev, LAST_PACKET, NULL, 0);
 309
 310         /* Store the just received frame */
 311         gspca_frame_add(gspca_dev, FIRST_PACKET, data, len);
 312 }
 313
 314 /* sub-driver description */
 315 static const struct sd_desc sd_desc = {
 316         .name = MODULE_NAME,
 317         .config = sd_config,
 318         .init = sd_init,
 319         .start = sd_start,
 320         .stopN = sd_stopN,
 321         .stop0 = sd_stop0,
 322         .pkt_scan = sd_pkt_scan,
 323 };
 324
 325 /* -- module initialisation -- */
 326 static const struct usb_device_id device_table[] = {
 327         {USB_DEVICE(0x0553, 0x0202)},
 328         {USB_DEVICE(0x041e, 0x4007)},
 329         {}
 330 };
 331 MODULE_DEVICE_TABLE(usb, device_table);
 332
 333 /* -- device connect -- */
 334 static int sd_probe(struct usb_interface *intf,
 335                         const struct usb_device_id *id)
 336 {
 337         return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
 338                                 THIS_MODULE);
 339 }
 340
 341 static struct usb_driver sd_driver = {
 342         .name = MODULE_NAME,
 343         .id_table = device_table,
 344         .probe = sd_probe,
 345         .disconnect = gspca_disconnect,
 346 #ifdef CONFIG_PM
 347         .suspend = gspca_suspend,
 348         .resume = gspca_resume,
 349         .reset_resume = gspca_resume,
 350 #endif
 351 };
 352
 353 module_usb_driver(sd_driver);