drivers/media/usb/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 writing %02x to %02x: %d\n",
 107                        value, index, ret);
 108                 gspca_dev->usb_err = ret;
 109         }
 110 }
 111
 112 static void reg_r(struct gspca_dev *gspca_dev, u16 value, u16 index)
 113 {
 114         struct usb_device *dev = gspca_dev->dev;
 115         int ret;
 116
 117         if (gspca_dev->usb_err < 0)
 118                 return;
 119         ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 120                         0x03,
 121                         USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 122                         value,
 123                         index,
 124                         gspca_dev->usb_buf,
 125                         2,
 126                         1000);
 127         if (ret < 0) {
 128                 pr_err("reg_r err %d\n", ret);
 129                 gspca_dev->usb_err = ret;
 130         }
 131 }
 132
 133 static void konica_stream_on(struct gspca_dev *gspca_dev)
 134 {
 135         reg_w(gspca_dev, 1, 0x0b);
 136 }
 137
 138 static void konica_stream_off(struct gspca_dev *gspca_dev)
 139 {
 140         reg_w(gspca_dev, 0, 0x0b);
 141 }
 142
 143 /* this function is called at probe time */
 144 static int sd_config(struct gspca_dev *gspca_dev,
 145                         const struct usb_device_id *id)
 146 {
 147         gspca_dev->cam.cam_mode = vga_mode;
 148         gspca_dev->cam.nmodes = ARRAY_SIZE(vga_mode);
 149         gspca_dev->cam.no_urb_create = 1;
 150
 151         return 0;
 152 }
 153
 154 /* this function is called at probe and resume time */
 155 static int sd_init(struct gspca_dev *gspca_dev)
 156 {
 157         int i;
 158
 159         /*
 160          * The konica needs a freaking large time to "boot" (approx 6.5 sec.),
 161          * and does not want to be bothered while doing so :|
 162          * Register 0x10 counts from 1 - 3, with 3 being "ready"
 163          */
 164         msleep(6000);
 165         for (i = 0; i < 20; i++) {
 166                 reg_r(gspca_dev, 0, 0x10);
 167                 if (gspca_dev->usb_buf[0] == 3)
 168                         break;
 169                 msleep(100);
 170         }
 171         reg_w(gspca_dev, 0, 0x0d);
 172
 173         return gspca_dev->usb_err;
 174 }
 175
 176 static int sd_start(struct gspca_dev *gspca_dev)
 177 {
 178         struct sd *sd = (struct sd *) gspca_dev;
 179         struct urb *urb;
 180         int i, n, packet_size;
 181         struct usb_host_interface *alt;
 182         struct usb_interface *intf;
 183
 184         intf = usb_ifnum_to_if(sd->gspca_dev.dev, sd->gspca_dev.iface);
 185         alt = usb_altnum_to_altsetting(intf, sd->gspca_dev.alt);
 186         if (!alt) {
 187                 pr_err("Couldn't get altsetting\n");
 188                 return -EIO;
 189         }
 190
 191         packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize);
 192
 193         n = gspca_dev->cam.cam_mode[gspca_dev->curr_mode].priv;
 194         reg_w(gspca_dev, n, 0x08);
 195
 196         konica_stream_on(gspca_dev);
 197
 198         if (gspca_dev->usb_err)
 199                 return gspca_dev->usb_err;
 200
 201         /* create 4 URBs - 2 on endpoint 0x83 and 2 on 0x082 */
 202 #if MAX_NURBS < 4
 203 #error "Not enough URBs in the gspca table"
 204 #endif
 205 #define SD_NPKT 32
 206         for (n = 0; n < 4; n++) {
 207                 i = n & 1 ? 0 : 1;
 208                 packet_size =
 209                         le16_to_cpu(alt->endpoint[i].desc.wMaxPacketSize);
 210                 urb = usb_alloc_urb(SD_NPKT, GFP_KERNEL);
 211                 if (!urb)
 212                         return -ENOMEM;
 213                 gspca_dev->urb[n] = urb;
 214                 urb->transfer_buffer = usb_alloc_coherent(gspca_dev->dev,
 215                                                 packet_size * SD_NPKT,
 216                                                 GFP_KERNEL,
 217                                                 &urb->transfer_dma);
 218                 if (urb->transfer_buffer == NULL) {
 219                         pr_err("usb_buffer_alloc failed\n");
 220                         return -ENOMEM;
 221                 }
 222
 223                 urb->dev = gspca_dev->dev;
 224                 urb->context = gspca_dev;
 225                 urb->transfer_buffer_length = packet_size * SD_NPKT;
 226                 urb->pipe = usb_rcvisocpipe(gspca_dev->dev,
 227                                         n & 1 ? 0x81 : 0x82);
 228                 urb->transfer_flags = URB_ISO_ASAP
 229                                         | URB_NO_TRANSFER_DMA_MAP;
 230                 urb->interval = 1;
 231                 urb->complete = sd_isoc_irq;
 232                 urb->number_of_packets = SD_NPKT;
 233                 for (i = 0; i < SD_NPKT; i++) {
 234                         urb->iso_frame_desc[i].length = packet_size;
 235                         urb->iso_frame_desc[i].offset = packet_size * i;
 236                 }
 237         }
 238
 239         return 0;
 240 }
 241
 242 static void sd_stopN(struct gspca_dev *gspca_dev)
 243 {
 244         struct sd *sd __maybe_unused = (struct sd *) gspca_dev;
 245
 246         konica_stream_off(gspca_dev);
 247 #if IS_ENABLED(CONFIG_INPUT)
 248         /* Don't keep the button in the pressed state "forever" if it was
 249            pressed when streaming is stopped */
 250         if (sd->snapshot_pressed) {
 251                 input_report_key(gspca_dev->input_dev, KEY_CAMERA, 0);
 252                 input_sync(gspca_dev->input_dev);
 253                 sd->snapshot_pressed = 0;
 254         }
 255 #endif
 256 }
 257
 258 /* reception of an URB */
 259 static void sd_isoc_irq(struct urb *urb)
 260 {
 261         struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
 262         struct sd *sd = (struct sd *) gspca_dev;
 263         struct urb *data_urb, *status_urb;
 264         u8 *data;
 265         int i, st;
 266
 267         PDEBUG(D_PACK, "sd isoc irq");
 268         if (!gspca_dev->streaming)
 269                 return;
 270
 271         if (urb->status != 0) {
 272                 if (urb->status == -ESHUTDOWN)
 273                         return;         /* disconnection */
 274 #ifdef CONFIG_PM
 275                 if (gspca_dev->frozen)
 276                         return;
 277 #endif
 278                 PERR("urb status: %d", urb->status);
 279                 st = usb_submit_urb(urb, GFP_ATOMIC);
 280                 if (st < 0)
 281                         pr_err("resubmit urb error %d\n", st);
 282                 return;
 283         }
 284
 285         /* if this is a data URB (ep 0x82), wait */
 286         if (urb->transfer_buffer_length > 32) {
 287                 sd->last_data_urb = urb;
 288                 return;
 289         }
 290
 291         status_urb = urb;
 292         data_urb   = sd->last_data_urb;
 293         sd->last_data_urb = NULL;
 294
 295         if (!data_urb || data_urb->start_frame != status_urb->start_frame) {
 296                 PERR("lost sync on frames");
 297                 goto resubmit;
 298         }
 299
 300         if (data_urb->number_of_packets != status_urb->number_of_packets) {
 301                 PERR("no packets does not match, data: %d, status: %d",
 302                      data_urb->number_of_packets,
 303                      status_urb->number_of_packets);
 304                 goto resubmit;
 305         }
 306
 307         for (i = 0; i < status_urb->number_of_packets; i++) {
 308                 if (data_urb->iso_frame_desc[i].status ||
 309                     status_urb->iso_frame_desc[i].status) {
 310                         PERR("pkt %d data-status %d, status-status %d", i,
 311                              data_urb->iso_frame_desc[i].status,
 312                              status_urb->iso_frame_desc[i].status);
 313                         gspca_dev->last_packet_type = DISCARD_PACKET;
 314                         continue;
 315                 }
 316
 317                 if (status_urb->iso_frame_desc[i].actual_length != 1) {
 318                         PERR("bad status packet length %d",
 319                              status_urb->iso_frame_desc[i].actual_length);
 320                         gspca_dev->last_packet_type = DISCARD_PACKET;
 321                         continue;
 322                 }
 323
 324                 st = *((u8 *)status_urb->transfer_buffer
 325                                 + status_urb->iso_frame_desc[i].offset);
 326
 327                 data = (u8 *)data_urb->transfer_buffer
 328                                 + data_urb->iso_frame_desc[i].offset;
 329
 330                 /* st: 0x80-0xff: frame start with frame number (ie 0-7f)
 331                  * otherwise:
 332                  * bit 0 0: keep packet
 333                  *       1: drop packet (padding data)
 334                  *
 335                  * bit 4 0 button not clicked
 336                  *       1 button clicked
 337                  * button is used to `take a picture' (in software)
 338                  */
 339                 if (st & 0x80) {
 340                         gspca_frame_add(gspca_dev, LAST_PACKET, NULL, 0);
 341                         gspca_frame_add(gspca_dev, FIRST_PACKET, NULL, 0);
 342                 } else {
 343 #if IS_ENABLED(CONFIG_INPUT)
 344                         u8 button_state = st & 0x40 ? 1 : 0;
 345                         if (sd->snapshot_pressed != button_state) {
 346                                 input_report_key(gspca_dev->input_dev,
 347                                                  KEY_CAMERA,
 348                                                  button_state);
 349                                 input_sync(gspca_dev->input_dev);
 350                                 sd->snapshot_pressed = button_state;
 351                         }
 352 #endif
 353                         if (st & 0x01)
 354                                 continue;
 355                 }
 356                 gspca_frame_add(gspca_dev, INTER_PACKET, data,
 357                                 data_urb->iso_frame_desc[i].actual_length);
 358         }
 359
 360 resubmit:
 361         if (data_urb) {
 362                 st = usb_submit_urb(data_urb, GFP_ATOMIC);
 363                 if (st < 0)
 364                         PERR("usb_submit_urb(data_urb) ret %d", st);
 365         }
 366         st = usb_submit_urb(status_urb, GFP_ATOMIC);
 367         if (st < 0)
 368                 PERR("usb_submit_urb(status_urb) ret %d\n", st);
 369 }
 370
 371 static int sd_s_ctrl(struct v4l2_ctrl *ctrl)
 372 {
 373         struct gspca_dev *gspca_dev =
 374                 container_of(ctrl->handler, struct gspca_dev, ctrl_handler);
 375
 376         gspca_dev->usb_err = 0;
 377
 378         if (!gspca_dev->streaming)
 379                 return 0;
 380
 381         switch (ctrl->id) {
 382         case V4L2_CID_BRIGHTNESS:
 383                 konica_stream_off(gspca_dev);
 384                 reg_w(gspca_dev, ctrl->val, BRIGHTNESS_REG);
 385                 konica_stream_on(gspca_dev);
 386                 break;
 387         case V4L2_CID_CONTRAST:
 388                 konica_stream_off(gspca_dev);
 389                 reg_w(gspca_dev, ctrl->val, CONTRAST_REG);
 390                 konica_stream_on(gspca_dev);
 391                 break;
 392         case V4L2_CID_SATURATION:
 393                 konica_stream_off(gspca_dev);
 394                 reg_w(gspca_dev, ctrl->val, SATURATION_REG);
 395                 konica_stream_on(gspca_dev);
 396                 break;
 397         case V4L2_CID_WHITE_BALANCE_TEMPERATURE:
 398                 konica_stream_off(gspca_dev);
 399                 reg_w(gspca_dev, ctrl->val, WHITEBAL_REG);
 400                 konica_stream_on(gspca_dev);
 401                 break;
 402         case V4L2_CID_SHARPNESS:
 403                 konica_stream_off(gspca_dev);
 404                 reg_w(gspca_dev, ctrl->val, SHARPNESS_REG);
 405                 konica_stream_on(gspca_dev);
 406                 break;
 407         }
 408         return gspca_dev->usb_err;
 409 }
 410
 411 static const struct v4l2_ctrl_ops sd_ctrl_ops = {
 412         .s_ctrl = sd_s_ctrl,
 413 };
 414
 415 static int sd_init_controls(struct gspca_dev *gspca_dev)
 416 {
 417         struct v4l2_ctrl_handler *hdl = &gspca_dev->ctrl_handler;
 418
 419         gspca_dev->vdev.ctrl_handler = hdl;
 420         v4l2_ctrl_handler_init(hdl, 5);
 421         v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
 422                         V4L2_CID_BRIGHTNESS, 0, 9, 1, 4);
 423         /* Needs to be verified */
 424         v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
 425                         V4L2_CID_CONTRAST, 0, 9, 1, 4);
 426         v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
 427                         V4L2_CID_SATURATION, 0, 9, 1, 4);
 428         v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
 429                         V4L2_CID_WHITE_BALANCE_TEMPERATURE,
 430                         0, 33, 1, 25);
 431         v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
 432                         V4L2_CID_SHARPNESS, 0, 9, 1, 4);
 433
 434         if (hdl->error) {
 435                 pr_err("Could not initialize controls\n");
 436                 return hdl->error;
 437         }
 438         return 0;
 439 }
 440
 441 /* sub-driver description */
 442 static const struct sd_desc sd_desc = {
 443         .name = MODULE_NAME,
 444         .config = sd_config,
 445         .init = sd_init,
 446         .init_controls = sd_init_controls,
 447         .start = sd_start,
 448         .stopN = sd_stopN,
 449 #if IS_ENABLED(CONFIG_INPUT)
 450         .other_input = 1,
 451 #endif
 452 };
 453
 454 /* -- module initialisation -- */
 455 static const struct usb_device_id device_table[] = {
 456         {USB_DEVICE(0x04c8, 0x0720)}, /* Intel YC 76 */
 457         {}
 458 };
 459 MODULE_DEVICE_TABLE(usb, device_table);
 460
 461 /* -- device connect -- */
 462 static int sd_probe(struct usb_interface *intf,
 463                         const struct usb_device_id *id)
 464 {
 465         return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
 466                                 THIS_MODULE);
 467 }
 468
 469 static struct usb_driver sd_driver = {
 470         .name = MODULE_NAME,
 471         .id_table = device_table,
 472         .probe = sd_probe,
 473         .disconnect = gspca_disconnect,
 474 #ifdef CONFIG_PM
 475         .suspend = gspca_suspend,
 476         .resume = gspca_resume,
 477         .reset_resume = gspca_resume,
 478 #endif
 479 };
 480
 481 module_usb_driver(sd_driver);