Pileus Git - ~andy/linux/blob - drivers/media/video/gspca/konica.c

   1 /*
   2  * Driver for USB webcams based on Konica chipset. This
   3  * chipset is used in Intel YC76 camera.
   4  *
   5  * Copyright (C) 2010 Hans de Goede <hdegoede@redhat.com>
   6  *
   7  * Based on the usbvideo v4l1 konicawc driver which is:
   8  *
   9  * Copyright (C) 2002 Simon Evans <spse@secret.org.uk>
  10  *
  11  * The code for making gspca work with a webcam with 2 isoc endpoints was
  12  * taken from the benq gspca subdriver which is:
  13  *
  14  * Copyright (C) 2009 Jean-Francois Moine (http://moinejf.free.fr)
  15  *
  16  * This program is free software; you can redistribute it and/or modify
  17  * it under the terms of the GNU General Public License as published by
  18  * the Free Software Foundation; either version 2 of the License, or
  19  * any later version.
  20  *
  21  * This program is distributed in the hope that it will be useful,
  22  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  23  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  24  * GNU General Public License for more details.
  25  *
  26  * You should have received a copy of the GNU General Public License
  27  * along with this program; if not, write to the Free Software
  28  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  29  */
  30
  31 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  32
  33 #define MODULE_NAME "konica"
  34
  35 #include <linux/input.h>
  36 #include "gspca.h"
  37
  38 MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
  39 MODULE_DESCRIPTION("Konica chipset USB Camera Driver");
  40 MODULE_LICENSE("GPL");
  41
  42 #define WHITEBAL_REG   0x01
  43 #define BRIGHTNESS_REG 0x02
  44 #define SHARPNESS_REG  0x03
  45 #define CONTRAST_REG   0x04
  46 #define SATURATION_REG 0x05
  47
  48 /* specific webcam descriptor */
  49 struct sd {
  50         struct gspca_dev gspca_dev;     /* !! must be the first item */
  51         struct urb *last_data_urb;
  52         u8 snapshot_pressed;
  53 };
  54
  55
  56 /* .priv is what goes to register 8 for this mode, known working values:
  57    0x00 -> 176x144, cropped
  58    0x01 -> 176x144, cropped
  59    0x02 -> 176x144, cropped
  60    0x03 -> 176x144, cropped
  61    0x04 -> 176x144, binned
  62    0x05 -> 320x240
  63    0x06 -> 320x240
  64    0x07 -> 160x120, cropped
  65    0x08 -> 160x120, cropped
  66    0x09 -> 160x120, binned (note has 136 lines)
  67    0x0a -> 160x120, binned (note has 136 lines)
  68    0x0b -> 160x120, cropped
  69 */
  70 static const struct v4l2_pix_format vga_mode[] = {
  71         {160, 120, V4L2_PIX_FMT_KONICA420, V4L2_FIELD_NONE,
  72                 .bytesperline = 160,
  73                 .sizeimage = 160 * 136 * 3 / 2 + 960,
  74                 .colorspace = V4L2_COLORSPACE_SRGB,
  75                 .priv = 0x0a},
  76         {176, 144, V4L2_PIX_FMT_KONICA420, V4L2_FIELD_NONE,
  77                 .bytesperline = 176,
  78                 .sizeimage = 176 * 144 * 3 / 2 + 960,
  79                 .colorspace = V4L2_COLORSPACE_SRGB,
  80                 .priv = 0x04},
  81         {320, 240, V4L2_PIX_FMT_KONICA420, V4L2_FIELD_NONE,
  82                 .bytesperline = 320,
  83                 .sizeimage = 320 * 240 * 3 / 2 + 960,
  84                 .colorspace = V4L2_COLORSPACE_SRGB,
  85                 .priv = 0x05},
  86 };
  87
  88 static void sd_isoc_irq(struct urb *urb);
  89
  90 static void reg_w(struct gspca_dev *gspca_dev, u16 value, u16 index)
  91 {
  92         struct usb_device *dev = gspca_dev->dev;
  93         int ret;
  94
  95         if (gspca_dev->usb_err < 0)
  96                 return;
  97         ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
  98                         0x02,
  99                         USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 100                         value,
 101                         index,
 102                         NULL,
 103                         0,
 104                         1000);
 105         if (ret < 0) {
 106                 pr_err("reg_w err %d\n", ret);
 107                 gspca_dev->usb_err = ret;
 108         }
 109 }
 110
 111 static void reg_r(struct gspca_dev *gspca_dev, u16 value, u16 index)
 112 {
 113         struct usb_device *dev = gspca_dev->dev;
 114         int ret;
 115
 116         if (gspca_dev->usb_err < 0)
 117                 return;
 118         ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 119                         0x03,
 120                         USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 121                         value,
 122                         index,
 123                         gspca_dev->usb_buf,
 124                         2,
 125                         1000);
 126         if (ret < 0) {
 127                 pr_err("reg_w err %d\n", ret);
 128                 gspca_dev->usb_err = ret;
 129         }
 130 }
 131
 132 static void konica_stream_on(struct gspca_dev *gspca_dev)
 133 {
 134         reg_w(gspca_dev, 1, 0x0b);
 135 }
 136
 137 static void konica_stream_off(struct gspca_dev *gspca_dev)
 138 {
 139         reg_w(gspca_dev, 0, 0x0b);
 140 }
 141
 142 /* this function is called at probe time */
 143 static int sd_config(struct gspca_dev *gspca_dev,
 144                         const struct usb_device_id *id)
 145 {
 146         gspca_dev->cam.cam_mode = vga_mode;
 147         gspca_dev->cam.nmodes = ARRAY_SIZE(vga_mode);
 148         gspca_dev->cam.no_urb_create = 1;
 149
 150         return 0;
 151 }
 152
 153 /* this function is called at probe and resume time */
 154 static int sd_init(struct gspca_dev *gspca_dev)
 155 {
 156         /* HDG not sure if these 2 reads are needed */
 157         reg_r(gspca_dev, 0, 0x10);
 158         PDEBUG(D_PROBE, "Reg 0x10 reads: %02x %02x",
 159                gspca_dev->usb_buf[0], gspca_dev->usb_buf[1]);
 160         reg_r(gspca_dev, 0, 0x10);
 161         PDEBUG(D_PROBE, "Reg 0x10 reads: %02x %02x",
 162                gspca_dev->usb_buf[0], gspca_dev->usb_buf[1]);
 163         reg_w(gspca_dev, 0, 0x0d);
 164
 165         return 0;
 166 }
 167
 168 static int sd_start(struct gspca_dev *gspca_dev)
 169 {
 170         struct sd *sd = (struct sd *) gspca_dev;
 171         struct urb *urb;
 172         int i, n, packet_size;
 173         struct usb_host_interface *alt;
 174         struct usb_interface *intf;
 175
 176         intf = usb_ifnum_to_if(sd->gspca_dev.dev, sd->gspca_dev.iface);
 177         alt = usb_altnum_to_altsetting(intf, sd->gspca_dev.alt);
 178         if (!alt) {
 179                 pr_err("Couldn't get altsetting\n");
 180                 return -EIO;
 181         }
 182
 183         packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize);
 184
 185         n = gspca_dev->cam.cam_mode[gspca_dev->curr_mode].priv;
 186         reg_w(gspca_dev, n, 0x08);
 187
 188         konica_stream_on(gspca_dev);
 189
 190         if (gspca_dev->usb_err)
 191                 return gspca_dev->usb_err;
 192
 193         /* create 4 URBs - 2 on endpoint 0x83 and 2 on 0x082 */
 194 #if MAX_NURBS < 4
 195 #error "Not enough URBs in the gspca table"
 196 #endif
 197 #define SD_NPKT 32
 198         for (n = 0; n < 4; n++) {
 199                 i = n & 1 ? 0 : 1;
 200                 packet_size =
 201                         le16_to_cpu(alt->endpoint[i].desc.wMaxPacketSize);
 202                 urb = usb_alloc_urb(SD_NPKT, GFP_KERNEL);
 203                 if (!urb) {
 204                         pr_err("usb_alloc_urb failed\n");
 205                         return -ENOMEM;
 206                 }
 207                 gspca_dev->urb[n] = urb;
 208                 urb->transfer_buffer = usb_alloc_coherent(gspca_dev->dev,
 209                                                 packet_size * SD_NPKT,
 210                                                 GFP_KERNEL,
 211                                                 &urb->transfer_dma);
 212                 if (urb->transfer_buffer == NULL) {
 213                         pr_err("usb_buffer_alloc failed\n");
 214                         return -ENOMEM;
 215                 }
 216
 217                 urb->dev = gspca_dev->dev;
 218                 urb->context = gspca_dev;
 219                 urb->transfer_buffer_length = packet_size * SD_NPKT;
 220                 urb->pipe = usb_rcvisocpipe(gspca_dev->dev,
 221                                         n & 1 ? 0x81 : 0x82);
 222                 urb->transfer_flags = URB_ISO_ASAP
 223                                         | URB_NO_TRANSFER_DMA_MAP;
 224                 urb->interval = 1;
 225                 urb->complete = sd_isoc_irq;
 226                 urb->number_of_packets = SD_NPKT;
 227                 for (i = 0; i < SD_NPKT; i++) {
 228                         urb->iso_frame_desc[i].length = packet_size;
 229                         urb->iso_frame_desc[i].offset = packet_size * i;
 230                 }
 231         }
 232
 233         return 0;
 234 }
 235
 236 static void sd_stopN(struct gspca_dev *gspca_dev)
 237 {
 238         struct sd *sd = (struct sd *) gspca_dev;
 239
 240         konica_stream_off(gspca_dev);
 241 #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
 242         /* Don't keep the button in the pressed state "forever" if it was
 243            pressed when streaming is stopped */
 244         if (sd->snapshot_pressed) {
 245                 input_report_key(gspca_dev->input_dev, KEY_CAMERA, 0);
 246                 input_sync(gspca_dev->input_dev);
 247                 sd->snapshot_pressed = 0;
 248         }
 249 #endif
 250 }
 251
 252 /* reception of an URB */
 253 static void sd_isoc_irq(struct urb *urb)
 254 {
 255         struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
 256         struct sd *sd = (struct sd *) gspca_dev;
 257         struct urb *data_urb, *status_urb;
 258         u8 *data;
 259         int i, st;
 260
 261         PDEBUG(D_PACK, "sd isoc irq");
 262         if (!gspca_dev->streaming)
 263                 return;
 264
 265         if (urb->status != 0) {
 266                 if (urb->status == -ESHUTDOWN)
 267                         return;         /* disconnection */
 268 #ifdef CONFIG_PM
 269                 if (gspca_dev->frozen)
 270                         return;
 271 #endif
 272                 PDEBUG(D_ERR, "urb status: %d", urb->status);
 273                 st = usb_submit_urb(urb, GFP_ATOMIC);
 274                 if (st < 0)
 275                         pr_err("resubmit urb error %d\n", st);
 276                 return;
 277         }
 278
 279         /* if this is a data URB (ep 0x82), wait */
 280         if (urb->transfer_buffer_length > 32) {
 281                 sd->last_data_urb = urb;
 282                 return;
 283         }
 284
 285         status_urb = urb;
 286         data_urb   = sd->last_data_urb;
 287         sd->last_data_urb = NULL;
 288
 289         if (!data_urb || data_urb->start_frame != status_urb->start_frame) {
 290                 PDEBUG(D_ERR|D_PACK, "lost sync on frames");
 291                 goto resubmit;
 292         }
 293
 294         if (data_urb->number_of_packets != status_urb->number_of_packets) {
 295                 PDEBUG(D_ERR|D_PACK,
 296                        "no packets does not match, data: %d, status: %d",
 297                        data_urb->number_of_packets,
 298                        status_urb->number_of_packets);
 299                 goto resubmit;
 300         }
 301
 302         for (i = 0; i < status_urb->number_of_packets; i++) {
 303                 if (data_urb->iso_frame_desc[i].status ||
 304                     status_urb->iso_frame_desc[i].status) {
 305                         PDEBUG(D_ERR|D_PACK,
 306                                "pkt %d data-status %d, status-status %d", i,
 307                                data_urb->iso_frame_desc[i].status,
 308                                status_urb->iso_frame_desc[i].status);
 309                         gspca_dev->last_packet_type = DISCARD_PACKET;
 310                         continue;
 311                 }
 312
 313                 if (status_urb->iso_frame_desc[i].actual_length != 1) {
 314                         PDEBUG(D_ERR|D_PACK,
 315                                "bad status packet length %d",
 316                                status_urb->iso_frame_desc[i].actual_length);
 317                         gspca_dev->last_packet_type = DISCARD_PACKET;
 318                         continue;
 319                 }
 320
 321                 st = *((u8 *)status_urb->transfer_buffer
 322                                 + status_urb->iso_frame_desc[i].offset);
 323
 324                 data = (u8 *)data_urb->transfer_buffer
 325                                 + data_urb->iso_frame_desc[i].offset;
 326
 327                 /* st: 0x80-0xff: frame start with frame number (ie 0-7f)
 328                  * otherwise:
 329                  * bit 0 0: keep packet
 330                  *       1: drop packet (padding data)
 331                  *
 332                  * bit 4 0 button not clicked
 333                  *       1 button clicked
 334                  * button is used to `take a picture' (in software)
 335                  */
 336                 if (st & 0x80) {
 337                         gspca_frame_add(gspca_dev, LAST_PACKET, NULL, 0);
 338                         gspca_frame_add(gspca_dev, FIRST_PACKET, NULL, 0);
 339                 } else {
 340 #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
 341                         u8 button_state = st & 0x40 ? 1 : 0;
 342                         if (sd->snapshot_pressed != button_state) {
 343                                 input_report_key(gspca_dev->input_dev,
 344                                                  KEY_CAMERA,
 345                                                  button_state);
 346                                 input_sync(gspca_dev->input_dev);
 347                                 sd->snapshot_pressed = button_state;
 348                         }
 349 #endif
 350                         if (st & 0x01)
 351                                 continue;
 352                 }
 353                 gspca_frame_add(gspca_dev, INTER_PACKET, data,
 354                                 data_urb->iso_frame_desc[i].actual_length);
 355         }
 356
 357 resubmit:
 358         if (data_urb) {
 359                 st = usb_submit_urb(data_urb, GFP_ATOMIC);
 360                 if (st < 0)
 361                         PDEBUG(D_ERR|D_PACK,
 362                                "usb_submit_urb(data_urb) ret %d", st);
 363         }
 364         st = usb_submit_urb(status_urb, GFP_ATOMIC);
 365         if (st < 0)
 366                 pr_err("usb_submit_urb(status_urb) ret %d\n", st);
 367 }
 368
 369 static int sd_s_ctrl(struct v4l2_ctrl *ctrl)
 370 {
 371         struct gspca_dev *gspca_dev =
 372                 container_of(ctrl->handler, struct gspca_dev, ctrl_handler);
 373
 374         gspca_dev->usb_err = 0;
 375
 376         if (!gspca_dev->streaming)
 377                 return 0;
 378
 379         switch (ctrl->id) {
 380         case V4L2_CID_BRIGHTNESS:
 381                 konica_stream_off(gspca_dev);
 382                 reg_w(gspca_dev, ctrl->val, BRIGHTNESS_REG);
 383                 konica_stream_on(gspca_dev);
 384                 break;
 385         case V4L2_CID_CONTRAST:
 386                 konica_stream_off(gspca_dev);
 387                 reg_w(gspca_dev, ctrl->val, CONTRAST_REG);
 388                 konica_stream_on(gspca_dev);
 389                 break;
 390         case V4L2_CID_SATURATION:
 391                 konica_stream_off(gspca_dev);
 392                 reg_w(gspca_dev, ctrl->val, SATURATION_REG);
 393                 konica_stream_on(gspca_dev);
 394                 break;
 395         case V4L2_CID_WHITE_BALANCE_TEMPERATURE:
 396                 konica_stream_off(gspca_dev);
 397                 reg_w(gspca_dev, ctrl->val, WHITEBAL_REG);
 398                 konica_stream_on(gspca_dev);
 399                 break;
 400         case V4L2_CID_SHARPNESS:
 401                 konica_stream_off(gspca_dev);
 402                 reg_w(gspca_dev, ctrl->val, SHARPNESS_REG);
 403                 konica_stream_on(gspca_dev);
 404                 break;
 405         }
 406         return gspca_dev->usb_err;
 407 }
 408
 409 static const struct v4l2_ctrl_ops sd_ctrl_ops = {
 410         .s_ctrl = sd_s_ctrl,
 411 };
 412
 413 static int sd_init_controls(struct gspca_dev *gspca_dev)
 414 {
 415         struct v4l2_ctrl_handler *hdl = &gspca_dev->ctrl_handler;
 416
 417         gspca_dev->vdev.ctrl_handler = hdl;
 418         v4l2_ctrl_handler_init(hdl, 5);
 419         v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
 420                         V4L2_CID_BRIGHTNESS, 0, 9, 1, 4);
 421         /* Needs to be verified */
 422         v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
 423                         V4L2_CID_CONTRAST, 0, 9, 1, 4);
 424         v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
 425                         V4L2_CID_SATURATION, 0, 9, 1, 4);
 426         v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
 427                         V4L2_CID_WHITE_BALANCE_TEMPERATURE,
 428                         0, 33, 1, 25);
 429         v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
 430                         V4L2_CID_SHARPNESS, 0, 9, 1, 4);
 431
 432         if (hdl->error) {
 433                 pr_err("Could not initialize controls\n");
 434                 return hdl->error;
 435         }
 436         return 0;
 437 }
 438
 439 /* sub-driver description */
 440 static const struct sd_desc sd_desc = {
 441         .name = MODULE_NAME,
 442         .config = sd_config,
 443         .init = sd_init,
 444         .init_controls = sd_init_controls,
 445         .start = sd_start,
 446         .stopN = sd_stopN,
 447 #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
 448         .other_input = 1,
 449 #endif
 450 };
 451
 452 /* -- module initialisation -- */
 453 static const struct usb_device_id device_table[] = {
 454         {USB_DEVICE(0x04c8, 0x0720)}, /* Intel YC 76 */
 455         {}
 456 };
 457 MODULE_DEVICE_TABLE(usb, device_table);
 458
 459 /* -- device connect -- */
 460 static int sd_probe(struct usb_interface *intf,
 461                         const struct usb_device_id *id)
 462 {
 463         return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
 464                                 THIS_MODULE);
 465 }
 466
 467 static struct usb_driver sd_driver = {
 468         .name = MODULE_NAME,
 469         .id_table = device_table,
 470         .probe = sd_probe,
 471         .disconnect = gspca_disconnect,
 472 #ifdef CONFIG_PM
 473         .suspend = gspca_suspend,
 474         .resume = gspca_resume,
 475 #endif
 476 };
 477
 478 module_usb_driver(sd_driver);