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 pr_err("usb_alloc_urb failed\n"); 213 return -ENOMEM; 214 } 215 gspca_dev->urb[n] = urb; 216 urb->transfer_buffer = usb_alloc_coherent(gspca_dev->dev, 217 packet_size * SD_NPKT, 218 GFP_KERNEL, 219 &urb->transfer_dma); 220 if (urb->transfer_buffer == NULL) { 221 pr_err("usb_buffer_alloc failed\n"); 222 return -ENOMEM; 223 } 224 225 urb->dev = gspca_dev->dev; 226 urb->context = gspca_dev; 227 urb->transfer_buffer_length = packet_size * SD_NPKT; 228 urb->pipe = usb_rcvisocpipe(gspca_dev->dev, 229 n & 1 ? 0x81 : 0x82); 230 urb->transfer_flags = URB_ISO_ASAP 231 | URB_NO_TRANSFER_DMA_MAP; 232 urb->interval = 1; 233 urb->complete = sd_isoc_irq; 234 urb->number_of_packets = SD_NPKT; 235 for (i = 0; i < SD_NPKT; i++) { 236 urb->iso_frame_desc[i].length = packet_size; 237 urb->iso_frame_desc[i].offset = packet_size * i; 238 } 239 } 240 241 return 0; 242 } 243 244 static void sd_stopN(struct gspca_dev *gspca_dev) 245 { 246 struct sd *sd = (struct sd *) gspca_dev; 247 248 konica_stream_off(gspca_dev); 249 #if IS_ENABLED(CONFIG_INPUT) 250 /* Don't keep the button in the pressed state "forever" if it was 251 pressed when streaming is stopped */ 252 if (sd->snapshot_pressed) { 253 input_report_key(gspca_dev->input_dev, KEY_CAMERA, 0); 254 input_sync(gspca_dev->input_dev); 255 sd->snapshot_pressed = 0; 256 } 257 #endif 258 } 259 260 /* reception of an URB */ 261 static void sd_isoc_irq(struct urb *urb) 262 { 263 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; 264 struct sd *sd = (struct sd *) gspca_dev; 265 struct urb *data_urb, *status_urb; 266 u8 *data; 267 int i, st; 268 269 PDEBUG(D_PACK, "sd isoc irq"); 270 if (!gspca_dev->streaming) 271 return; 272 273 if (urb->status != 0) { 274 if (urb->status == -ESHUTDOWN) 275 return; /* disconnection */ 276 #ifdef CONFIG_PM 277 if (gspca_dev->frozen) 278 return; 279 #endif 280 PERR("urb status: %d", urb->status); 281 st = usb_submit_urb(urb, GFP_ATOMIC); 282 if (st < 0) 283 pr_err("resubmit urb error %d\n", st); 284 return; 285 } 286 287 /* if this is a data URB (ep 0x82), wait */ 288 if (urb->transfer_buffer_length > 32) { 289 sd->last_data_urb = urb; 290 return; 291 } 292 293 status_urb = urb; 294 data_urb = sd->last_data_urb; 295 sd->last_data_urb = NULL; 296 297 if (!data_urb || data_urb->start_frame != status_urb->start_frame) { 298 PERR("lost sync on frames"); 299 goto resubmit; 300 } 301 302 if (data_urb->number_of_packets != status_urb->number_of_packets) { 303 PERR("no packets does not match, data: %d, status: %d", 304 data_urb->number_of_packets, 305 status_urb->number_of_packets); 306 goto resubmit; 307 } 308 309 for (i = 0; i < status_urb->number_of_packets; i++) { 310 if (data_urb->iso_frame_desc[i].status || 311 status_urb->iso_frame_desc[i].status) { 312 PERR("pkt %d data-status %d, status-status %d", i, 313 data_urb->iso_frame_desc[i].status, 314 status_urb->iso_frame_desc[i].status); 315 gspca_dev->last_packet_type = DISCARD_PACKET; 316 continue; 317 } 318 319 if (status_urb->iso_frame_desc[i].actual_length != 1) { 320 PERR("bad status packet length %d", 321 status_urb->iso_frame_desc[i].actual_length); 322 gspca_dev->last_packet_type = DISCARD_PACKET; 323 continue; 324 } 325 326 st = *((u8 *)status_urb->transfer_buffer 327 + status_urb->iso_frame_desc[i].offset); 328 329 data = (u8 *)data_urb->transfer_buffer 330 + data_urb->iso_frame_desc[i].offset; 331 332 /* st: 0x80-0xff: frame start with frame number (ie 0-7f) 333 * otherwise: 334 * bit 0 0: keep packet 335 * 1: drop packet (padding data) 336 * 337 * bit 4 0 button not clicked 338 * 1 button clicked 339 * button is used to `take a picture' (in software) 340 */ 341 if (st & 0x80) { 342 gspca_frame_add(gspca_dev, LAST_PACKET, NULL, 0); 343 gspca_frame_add(gspca_dev, FIRST_PACKET, NULL, 0); 344 } else { 345 #if IS_ENABLED(CONFIG_INPUT) 346 u8 button_state = st & 0x40 ? 1 : 0; 347 if (sd->snapshot_pressed != button_state) { 348 input_report_key(gspca_dev->input_dev, 349 KEY_CAMERA, 350 button_state); 351 input_sync(gspca_dev->input_dev); 352 sd->snapshot_pressed = button_state; 353 } 354 #endif 355 if (st & 0x01) 356 continue; 357 } 358 gspca_frame_add(gspca_dev, INTER_PACKET, data, 359 data_urb->iso_frame_desc[i].actual_length); 360 } 361 362 resubmit: 363 if (data_urb) { 364 st = usb_submit_urb(data_urb, GFP_ATOMIC); 365 if (st < 0) 366 PERR("usb_submit_urb(data_urb) ret %d", st); 367 } 368 st = usb_submit_urb(status_urb, GFP_ATOMIC); 369 if (st < 0) 370 PERR("usb_submit_urb(status_urb) ret %d\n", st); 371 } 372 373 static int sd_s_ctrl(struct v4l2_ctrl *ctrl) 374 { 375 struct gspca_dev *gspca_dev = 376 container_of(ctrl->handler, struct gspca_dev, ctrl_handler); 377 378 gspca_dev->usb_err = 0; 379 380 if (!gspca_dev->streaming) 381 return 0; 382 383 switch (ctrl->id) { 384 case V4L2_CID_BRIGHTNESS: 385 konica_stream_off(gspca_dev); 386 reg_w(gspca_dev, ctrl->val, BRIGHTNESS_REG); 387 konica_stream_on(gspca_dev); 388 break; 389 case V4L2_CID_CONTRAST: 390 konica_stream_off(gspca_dev); 391 reg_w(gspca_dev, ctrl->val, CONTRAST_REG); 392 konica_stream_on(gspca_dev); 393 break; 394 case V4L2_CID_SATURATION: 395 konica_stream_off(gspca_dev); 396 reg_w(gspca_dev, ctrl->val, SATURATION_REG); 397 konica_stream_on(gspca_dev); 398 break; 399 case V4L2_CID_WHITE_BALANCE_TEMPERATURE: 400 konica_stream_off(gspca_dev); 401 reg_w(gspca_dev, ctrl->val, WHITEBAL_REG); 402 konica_stream_on(gspca_dev); 403 break; 404 case V4L2_CID_SHARPNESS: 405 konica_stream_off(gspca_dev); 406 reg_w(gspca_dev, ctrl->val, SHARPNESS_REG); 407 konica_stream_on(gspca_dev); 408 break; 409 } 410 return gspca_dev->usb_err; 411 } 412 413 static const struct v4l2_ctrl_ops sd_ctrl_ops = { 414 .s_ctrl = sd_s_ctrl, 415 }; 416 417 static int sd_init_controls(struct gspca_dev *gspca_dev) 418 { 419 struct v4l2_ctrl_handler *hdl = &gspca_dev->ctrl_handler; 420 421 gspca_dev->vdev.ctrl_handler = hdl; 422 v4l2_ctrl_handler_init(hdl, 5); 423 v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, 424 V4L2_CID_BRIGHTNESS, 0, 9, 1, 4); 425 /* Needs to be verified */ 426 v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, 427 V4L2_CID_CONTRAST, 0, 9, 1, 4); 428 v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, 429 V4L2_CID_SATURATION, 0, 9, 1, 4); 430 v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, 431 V4L2_CID_WHITE_BALANCE_TEMPERATURE, 432 0, 33, 1, 25); 433 v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, 434 V4L2_CID_SHARPNESS, 0, 9, 1, 4); 435 436 if (hdl->error) { 437 pr_err("Could not initialize controls\n"); 438 return hdl->error; 439 } 440 return 0; 441 } 442 443 /* sub-driver description */ 444 static const struct sd_desc sd_desc = { 445 .name = MODULE_NAME, 446 .config = sd_config, 447 .init = sd_init, 448 .init_controls = sd_init_controls, 449 .start = sd_start, 450 .stopN = sd_stopN, 451 #if IS_ENABLED(CONFIG_INPUT) 452 .other_input = 1, 453 #endif 454 }; 455 456 /* -- module initialisation -- */ 457 static const struct usb_device_id device_table[] = { 458 {USB_DEVICE(0x04c8, 0x0720)}, /* Intel YC 76 */ 459 {} 460 }; 461 MODULE_DEVICE_TABLE(usb, device_table); 462 463 /* -- device connect -- */ 464 static int sd_probe(struct usb_interface *intf, 465 const struct usb_device_id *id) 466 { 467 return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd), 468 THIS_MODULE); 469 } 470 471 static struct usb_driver sd_driver = { 472 .name = MODULE_NAME, 473 .id_table = device_table, 474 .probe = sd_probe, 475 .disconnect = gspca_disconnect, 476 #ifdef CONFIG_PM 477 .suspend = gspca_suspend, 478 .resume = gspca_resume, 479 .reset_resume = gspca_resume, 480 #endif 481 }; 482 483 module_usb_driver(sd_driver); 484