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 27 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 28 29 #define MODULE_NAME "konica" 30 31 #include <linux/input.h> 32 #include "gspca.h" 33 34 MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>"); 35 MODULE_DESCRIPTION("Konica chipset USB Camera Driver"); 36 MODULE_LICENSE("GPL"); 37 38 #define WHITEBAL_REG 0x01 39 #define BRIGHTNESS_REG 0x02 40 #define SHARPNESS_REG 0x03 41 #define CONTRAST_REG 0x04 42 #define SATURATION_REG 0x05 43 44 /* specific webcam descriptor */ 45 struct sd { 46 struct gspca_dev gspca_dev; /* !! must be the first item */ 47 struct urb *last_data_urb; 48 u8 snapshot_pressed; 49 }; 50 51 52 /* .priv is what goes to register 8 for this mode, known working values: 53 0x00 -> 176x144, cropped 54 0x01 -> 176x144, cropped 55 0x02 -> 176x144, cropped 56 0x03 -> 176x144, cropped 57 0x04 -> 176x144, binned 58 0x05 -> 320x240 59 0x06 -> 320x240 60 0x07 -> 160x120, cropped 61 0x08 -> 160x120, cropped 62 0x09 -> 160x120, binned (note has 136 lines) 63 0x0a -> 160x120, binned (note has 136 lines) 64 0x0b -> 160x120, cropped 65 */ 66 static const struct v4l2_pix_format vga_mode[] = { 67 {160, 120, V4L2_PIX_FMT_KONICA420, V4L2_FIELD_NONE, 68 .bytesperline = 160, 69 .sizeimage = 160 * 136 * 3 / 2 + 960, 70 .colorspace = V4L2_COLORSPACE_SRGB, 71 .priv = 0x0a}, 72 {176, 144, V4L2_PIX_FMT_KONICA420, V4L2_FIELD_NONE, 73 .bytesperline = 176, 74 .sizeimage = 176 * 144 * 3 / 2 + 960, 75 .colorspace = V4L2_COLORSPACE_SRGB, 76 .priv = 0x04}, 77 {320, 240, V4L2_PIX_FMT_KONICA420, V4L2_FIELD_NONE, 78 .bytesperline = 320, 79 .sizeimage = 320 * 240 * 3 / 2 + 960, 80 .colorspace = V4L2_COLORSPACE_SRGB, 81 .priv = 0x05}, 82 }; 83 84 static void sd_isoc_irq(struct urb *urb); 85 86 static void reg_w(struct gspca_dev *gspca_dev, u16 value, u16 index) 87 { 88 struct usb_device *dev = gspca_dev->dev; 89 int ret; 90 91 if (gspca_dev->usb_err < 0) 92 return; 93 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 94 0x02, 95 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 96 value, 97 index, 98 NULL, 99 0, 100 1000); 101 if (ret < 0) { 102 pr_err("reg_w err writing %02x to %02x: %d\n", 103 value, index, ret); 104 gspca_dev->usb_err = ret; 105 } 106 } 107 108 static void reg_r(struct gspca_dev *gspca_dev, u16 value, u16 index) 109 { 110 struct usb_device *dev = gspca_dev->dev; 111 int ret; 112 113 if (gspca_dev->usb_err < 0) 114 return; 115 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), 116 0x03, 117 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 118 value, 119 index, 120 gspca_dev->usb_buf, 121 2, 122 1000); 123 if (ret < 0) { 124 pr_err("reg_r err %d\n", ret); 125 gspca_dev->usb_err = ret; 126 } 127 } 128 129 static void konica_stream_on(struct gspca_dev *gspca_dev) 130 { 131 reg_w(gspca_dev, 1, 0x0b); 132 } 133 134 static void konica_stream_off(struct gspca_dev *gspca_dev) 135 { 136 reg_w(gspca_dev, 0, 0x0b); 137 } 138 139 /* this function is called at probe time */ 140 static int sd_config(struct gspca_dev *gspca_dev, 141 const struct usb_device_id *id) 142 { 143 gspca_dev->cam.cam_mode = vga_mode; 144 gspca_dev->cam.nmodes = ARRAY_SIZE(vga_mode); 145 gspca_dev->cam.no_urb_create = 1; 146 147 return 0; 148 } 149 150 /* this function is called at probe and resume time */ 151 static int sd_init(struct gspca_dev *gspca_dev) 152 { 153 int i; 154 155 /* 156 * The konica needs a freaking large time to "boot" (approx 6.5 sec.), 157 * and does not want to be bothered while doing so :| 158 * Register 0x10 counts from 1 - 3, with 3 being "ready" 159 */ 160 msleep(6000); 161 for (i = 0; i < 20; i++) { 162 reg_r(gspca_dev, 0, 0x10); 163 if (gspca_dev->usb_buf[0] == 3) 164 break; 165 msleep(100); 166 } 167 reg_w(gspca_dev, 0, 0x0d); 168 169 return gspca_dev->usb_err; 170 } 171 172 static int sd_start(struct gspca_dev *gspca_dev) 173 { 174 struct sd *sd = (struct sd *) gspca_dev; 175 struct urb *urb; 176 int i, n, packet_size; 177 struct usb_host_interface *alt; 178 struct usb_interface *intf; 179 180 intf = usb_ifnum_to_if(sd->gspca_dev.dev, sd->gspca_dev.iface); 181 alt = usb_altnum_to_altsetting(intf, sd->gspca_dev.alt); 182 if (!alt) { 183 pr_err("Couldn't get altsetting\n"); 184 return -EIO; 185 } 186 187 if (alt->desc.bNumEndpoints < 2) 188 return -ENODEV; 189 190 packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize); 191 192 n = gspca_dev->cam.cam_mode[gspca_dev->curr_mode].priv; 193 reg_w(gspca_dev, n, 0x08); 194 195 konica_stream_on(gspca_dev); 196 197 if (gspca_dev->usb_err) 198 return gspca_dev->usb_err; 199 200 /* create 4 URBs - 2 on endpoint 0x83 and 2 on 0x082 */ 201 #if MAX_NURBS < 4 202 #error "Not enough URBs in the gspca table" 203 #endif 204 #define SD_NPKT 32 205 for (n = 0; n < 4; n++) { 206 i = n & 1 ? 0 : 1; 207 packet_size = 208 le16_to_cpu(alt->endpoint[i].desc.wMaxPacketSize); 209 urb = usb_alloc_urb(SD_NPKT, GFP_KERNEL); 210 if (!urb) 211 return -ENOMEM; 212 gspca_dev->urb[n] = urb; 213 urb->transfer_buffer = usb_alloc_coherent(gspca_dev->dev, 214 packet_size * SD_NPKT, 215 GFP_KERNEL, 216 &urb->transfer_dma); 217 if (urb->transfer_buffer == NULL) { 218 pr_err("usb_buffer_alloc failed\n"); 219 return -ENOMEM; 220 } 221 222 urb->dev = gspca_dev->dev; 223 urb->context = gspca_dev; 224 urb->transfer_buffer_length = packet_size * SD_NPKT; 225 urb->pipe = usb_rcvisocpipe(gspca_dev->dev, 226 n & 1 ? 0x81 : 0x82); 227 urb->transfer_flags = URB_ISO_ASAP 228 | URB_NO_TRANSFER_DMA_MAP; 229 urb->interval = 1; 230 urb->complete = sd_isoc_irq; 231 urb->number_of_packets = SD_NPKT; 232 for (i = 0; i < SD_NPKT; i++) { 233 urb->iso_frame_desc[i].length = packet_size; 234 urb->iso_frame_desc[i].offset = packet_size * i; 235 } 236 } 237 238 return 0; 239 } 240 241 static void sd_stopN(struct gspca_dev *gspca_dev) 242 { 243 struct sd *sd __maybe_unused = (struct sd *) gspca_dev; 244 245 konica_stream_off(gspca_dev); 246 #if IS_ENABLED(CONFIG_INPUT) 247 /* Don't keep the button in the pressed state "forever" if it was 248 pressed when streaming is stopped */ 249 if (sd->snapshot_pressed) { 250 input_report_key(gspca_dev->input_dev, KEY_CAMERA, 0); 251 input_sync(gspca_dev->input_dev); 252 sd->snapshot_pressed = 0; 253 } 254 #endif 255 } 256 257 /* reception of an URB */ 258 static void sd_isoc_irq(struct urb *urb) 259 { 260 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; 261 struct sd *sd = (struct sd *) gspca_dev; 262 struct urb *data_urb, *status_urb; 263 u8 *data; 264 int i, st; 265 266 gspca_dbg(gspca_dev, D_PACK, "sd isoc irq\n"); 267 if (!gspca_dev->streaming) 268 return; 269 270 if (urb->status != 0) { 271 if (urb->status == -ESHUTDOWN) 272 return; /* disconnection */ 273 #ifdef CONFIG_PM 274 if (gspca_dev->frozen) 275 return; 276 #endif 277 gspca_err(gspca_dev, "urb status: %d\n", urb->status); 278 st = usb_submit_urb(urb, GFP_ATOMIC); 279 if (st < 0) 280 pr_err("resubmit urb error %d\n", st); 281 return; 282 } 283 284 /* if this is a data URB (ep 0x82), wait */ 285 if (urb->transfer_buffer_length > 32) { 286 sd->last_data_urb = urb; 287 return; 288 } 289 290 status_urb = urb; 291 data_urb = sd->last_data_urb; 292 sd->last_data_urb = NULL; 293 294 if (!data_urb || data_urb->start_frame != status_urb->start_frame) { 295 gspca_err(gspca_dev, "lost sync on frames\n"); 296 goto resubmit; 297 } 298 299 if (data_urb->number_of_packets != status_urb->number_of_packets) { 300 gspca_err(gspca_dev, "no packets does not match, data: %d, status: %d\n", 301 data_urb->number_of_packets, 302 status_urb->number_of_packets); 303 goto resubmit; 304 } 305 306 for (i = 0; i < status_urb->number_of_packets; i++) { 307 if (data_urb->iso_frame_desc[i].status || 308 status_urb->iso_frame_desc[i].status) { 309 gspca_err(gspca_dev, "pkt %d data-status %d, status-status %d\n", 310 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 gspca_err(gspca_dev, "bad status packet length %d\n", 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 gspca_err(gspca_dev, "usb_submit_urb(data_urb) ret %d\n", 365 st); 366 } 367 st = usb_submit_urb(status_urb, GFP_ATOMIC); 368 if (st < 0) 369 gspca_err(gspca_dev, "usb_submit_urb(status_urb) ret %d\n", st); 370 } 371 372 static int sd_s_ctrl(struct v4l2_ctrl *ctrl) 373 { 374 struct gspca_dev *gspca_dev = 375 container_of(ctrl->handler, struct gspca_dev, ctrl_handler); 376 377 gspca_dev->usb_err = 0; 378 379 if (!gspca_dev->streaming) 380 return 0; 381 382 switch (ctrl->id) { 383 case V4L2_CID_BRIGHTNESS: 384 konica_stream_off(gspca_dev); 385 reg_w(gspca_dev, ctrl->val, BRIGHTNESS_REG); 386 konica_stream_on(gspca_dev); 387 break; 388 case V4L2_CID_CONTRAST: 389 konica_stream_off(gspca_dev); 390 reg_w(gspca_dev, ctrl->val, CONTRAST_REG); 391 konica_stream_on(gspca_dev); 392 break; 393 case V4L2_CID_SATURATION: 394 konica_stream_off(gspca_dev); 395 reg_w(gspca_dev, ctrl->val, SATURATION_REG); 396 konica_stream_on(gspca_dev); 397 break; 398 case V4L2_CID_WHITE_BALANCE_TEMPERATURE: 399 konica_stream_off(gspca_dev); 400 reg_w(gspca_dev, ctrl->val, WHITEBAL_REG); 401 konica_stream_on(gspca_dev); 402 break; 403 case V4L2_CID_SHARPNESS: 404 konica_stream_off(gspca_dev); 405 reg_w(gspca_dev, ctrl->val, SHARPNESS_REG); 406 konica_stream_on(gspca_dev); 407 break; 408 } 409 return gspca_dev->usb_err; 410 } 411 412 static const struct v4l2_ctrl_ops sd_ctrl_ops = { 413 .s_ctrl = sd_s_ctrl, 414 }; 415 416 static int sd_init_controls(struct gspca_dev *gspca_dev) 417 { 418 struct v4l2_ctrl_handler *hdl = &gspca_dev->ctrl_handler; 419 420 gspca_dev->vdev.ctrl_handler = hdl; 421 v4l2_ctrl_handler_init(hdl, 5); 422 v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, 423 V4L2_CID_BRIGHTNESS, 0, 9, 1, 4); 424 /* Needs to be verified */ 425 v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, 426 V4L2_CID_CONTRAST, 0, 9, 1, 4); 427 v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, 428 V4L2_CID_SATURATION, 0, 9, 1, 4); 429 v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, 430 V4L2_CID_WHITE_BALANCE_TEMPERATURE, 431 0, 33, 1, 25); 432 v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, 433 V4L2_CID_SHARPNESS, 0, 9, 1, 4); 434 435 if (hdl->error) { 436 pr_err("Could not initialize controls\n"); 437 return hdl->error; 438 } 439 return 0; 440 } 441 442 /* sub-driver description */ 443 static const struct sd_desc sd_desc = { 444 .name = MODULE_NAME, 445 .config = sd_config, 446 .init = sd_init, 447 .init_controls = sd_init_controls, 448 .start = sd_start, 449 .stopN = sd_stopN, 450 #if IS_ENABLED(CONFIG_INPUT) 451 .other_input = 1, 452 #endif 453 }; 454 455 /* -- module initialisation -- */ 456 static const struct usb_device_id device_table[] = { 457 {USB_DEVICE(0x04c8, 0x0720)}, /* Intel YC 76 */ 458 {} 459 }; 460 MODULE_DEVICE_TABLE(usb, device_table); 461 462 /* -- device connect -- */ 463 static int sd_probe(struct usb_interface *intf, 464 const struct usb_device_id *id) 465 { 466 return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd), 467 THIS_MODULE); 468 } 469 470 static struct usb_driver sd_driver = { 471 .name = MODULE_NAME, 472 .id_table = device_table, 473 .probe = sd_probe, 474 .disconnect = gspca_disconnect, 475 #ifdef CONFIG_PM 476 .suspend = gspca_suspend, 477 .resume = gspca_resume, 478 .reset_resume = gspca_resume, 479 #endif 480 }; 481 482 module_usb_driver(sd_driver); 483