1 /* 2 * spca1528 subdriver 3 * 4 * Copyright (C) 2010-2011 Jean-Francois Moine (http://moinejf.free.fr) 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 */ 16 17 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 18 19 #define MODULE_NAME "spca1528" 20 21 #include "gspca.h" 22 #include "jpeg.h" 23 24 MODULE_AUTHOR("Jean-Francois Moine <http://moinejf.free.fr>"); 25 MODULE_DESCRIPTION("SPCA1528 USB Camera Driver"); 26 MODULE_LICENSE("GPL"); 27 28 /* specific webcam descriptor */ 29 struct sd { 30 struct gspca_dev gspca_dev; /* !! must be the first item */ 31 32 u8 pkt_seq; 33 34 u8 jpeg_hdr[JPEG_HDR_SZ]; 35 }; 36 37 static const struct v4l2_pix_format vga_mode[] = { 38 /* (does not work correctly) 39 {176, 144, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE, 40 .bytesperline = 176, 41 .sizeimage = 176 * 144 * 5 / 8 + 590, 42 .colorspace = V4L2_COLORSPACE_JPEG, 43 .priv = 3}, 44 */ 45 {320, 240, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE, 46 .bytesperline = 320, 47 .sizeimage = 320 * 240 * 4 / 8 + 590, 48 .colorspace = V4L2_COLORSPACE_JPEG, 49 .priv = 2}, 50 {640, 480, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE, 51 .bytesperline = 640, 52 .sizeimage = 640 * 480 * 3 / 8 + 590, 53 .colorspace = V4L2_COLORSPACE_JPEG, 54 .priv = 1}, 55 }; 56 57 /* read <len> bytes to gspca usb_buf */ 58 static void reg_r(struct gspca_dev *gspca_dev, 59 u8 req, 60 u16 index, 61 int len) 62 { 63 #if USB_BUF_SZ < 64 64 #error "USB buffer too small" 65 #endif 66 struct usb_device *dev = gspca_dev->dev; 67 int ret; 68 69 if (gspca_dev->usb_err < 0) 70 return; 71 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), 72 req, 73 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 74 0x0000, /* value */ 75 index, 76 gspca_dev->usb_buf, len, 77 500); 78 gspca_dbg(gspca_dev, D_USBI, "GET %02x 0000 %04x %02x\n", req, index, 79 gspca_dev->usb_buf[0]); 80 if (ret < 0) { 81 pr_err("reg_r err %d\n", ret); 82 gspca_dev->usb_err = ret; 83 } 84 } 85 86 static void reg_w(struct gspca_dev *gspca_dev, 87 u8 req, 88 u16 value, 89 u16 index) 90 { 91 struct usb_device *dev = gspca_dev->dev; 92 int ret; 93 94 if (gspca_dev->usb_err < 0) 95 return; 96 gspca_dbg(gspca_dev, D_USBO, "SET %02x %04x %04x\n", req, value, index); 97 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 98 req, 99 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 100 value, index, 101 NULL, 0, 500); 102 if (ret < 0) { 103 pr_err("reg_w err %d\n", ret); 104 gspca_dev->usb_err = ret; 105 } 106 } 107 108 static void reg_wb(struct gspca_dev *gspca_dev, 109 u8 req, 110 u16 value, 111 u16 index, 112 u8 byte) 113 { 114 struct usb_device *dev = gspca_dev->dev; 115 int ret; 116 117 if (gspca_dev->usb_err < 0) 118 return; 119 gspca_dbg(gspca_dev, D_USBO, "SET %02x %04x %04x %02x\n", 120 req, value, index, byte); 121 gspca_dev->usb_buf[0] = byte; 122 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 123 req, 124 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 125 value, index, 126 gspca_dev->usb_buf, 1, 500); 127 if (ret < 0) { 128 pr_err("reg_w err %d\n", ret); 129 gspca_dev->usb_err = ret; 130 } 131 } 132 133 static void wait_status_0(struct gspca_dev *gspca_dev) 134 { 135 int i, w; 136 137 i = 16; 138 w = 0; 139 do { 140 reg_r(gspca_dev, 0x21, 0x0000, 1); 141 if (gspca_dev->usb_buf[0] == 0) 142 return; 143 w += 15; 144 msleep(w); 145 } while (--i > 0); 146 gspca_err(gspca_dev, "wait_status_0 timeout\n"); 147 gspca_dev->usb_err = -ETIME; 148 } 149 150 static void wait_status_1(struct gspca_dev *gspca_dev) 151 { 152 int i; 153 154 i = 10; 155 do { 156 reg_r(gspca_dev, 0x21, 0x0001, 1); 157 msleep(10); 158 if (gspca_dev->usb_buf[0] == 1) { 159 reg_wb(gspca_dev, 0x21, 0x0000, 0x0001, 0x00); 160 reg_r(gspca_dev, 0x21, 0x0001, 1); 161 return; 162 } 163 } while (--i > 0); 164 gspca_err(gspca_dev, "wait_status_1 timeout\n"); 165 gspca_dev->usb_err = -ETIME; 166 } 167 168 static void setbrightness(struct gspca_dev *gspca_dev, s32 val) 169 { 170 reg_wb(gspca_dev, 0xc0, 0x0000, 0x00c0, val); 171 } 172 173 static void setcontrast(struct gspca_dev *gspca_dev, s32 val) 174 { 175 reg_wb(gspca_dev, 0xc1, 0x0000, 0x00c1, val); 176 } 177 178 static void sethue(struct gspca_dev *gspca_dev, s32 val) 179 { 180 reg_wb(gspca_dev, 0xc2, 0x0000, 0x0000, val); 181 } 182 183 static void setcolor(struct gspca_dev *gspca_dev, s32 val) 184 { 185 reg_wb(gspca_dev, 0xc3, 0x0000, 0x00c3, val); 186 } 187 188 static void setsharpness(struct gspca_dev *gspca_dev, s32 val) 189 { 190 reg_wb(gspca_dev, 0xc4, 0x0000, 0x00c4, val); 191 } 192 193 /* this function is called at probe time */ 194 static int sd_config(struct gspca_dev *gspca_dev, 195 const struct usb_device_id *id) 196 { 197 gspca_dev->cam.cam_mode = vga_mode; 198 gspca_dev->cam.nmodes = ARRAY_SIZE(vga_mode); 199 gspca_dev->cam.npkt = 128; /* number of packets per ISOC message */ 200 /*fixme: 256 in ms-win traces*/ 201 202 return 0; 203 } 204 205 /* this function is called at probe and resume time */ 206 static int sd_init(struct gspca_dev *gspca_dev) 207 { 208 reg_w(gspca_dev, 0x00, 0x0001, 0x2067); 209 reg_w(gspca_dev, 0x00, 0x00d0, 0x206b); 210 reg_w(gspca_dev, 0x00, 0x0000, 0x206c); 211 reg_w(gspca_dev, 0x00, 0x0001, 0x2069); 212 msleep(8); 213 reg_w(gspca_dev, 0x00, 0x00c0, 0x206b); 214 reg_w(gspca_dev, 0x00, 0x0000, 0x206c); 215 reg_w(gspca_dev, 0x00, 0x0001, 0x2069); 216 217 reg_r(gspca_dev, 0x20, 0x0000, 1); 218 reg_r(gspca_dev, 0x20, 0x0000, 5); 219 reg_r(gspca_dev, 0x23, 0x0000, 64); 220 gspca_dbg(gspca_dev, D_PROBE, "%s%s\n", &gspca_dev->usb_buf[0x1c], 221 &gspca_dev->usb_buf[0x30]); 222 reg_r(gspca_dev, 0x23, 0x0001, 64); 223 return gspca_dev->usb_err; 224 } 225 226 /* function called at start time before URB creation */ 227 static int sd_isoc_init(struct gspca_dev *gspca_dev) 228 { 229 u8 mode; 230 231 reg_r(gspca_dev, 0x00, 0x2520, 1); 232 wait_status_0(gspca_dev); 233 reg_w(gspca_dev, 0xc5, 0x0003, 0x0000); 234 wait_status_1(gspca_dev); 235 236 wait_status_0(gspca_dev); 237 mode = gspca_dev->cam.cam_mode[gspca_dev->curr_mode].priv; 238 reg_wb(gspca_dev, 0x25, 0x0000, 0x0004, mode); 239 reg_r(gspca_dev, 0x25, 0x0004, 1); 240 reg_wb(gspca_dev, 0x27, 0x0000, 0x0000, 0x06); /* 420 */ 241 reg_r(gspca_dev, 0x27, 0x0000, 1); 242 243 /* not useful.. 244 gspca_dev->alt = 4; * use alternate setting 3 */ 245 246 return gspca_dev->usb_err; 247 } 248 249 /* -- start the camera -- */ 250 static int sd_start(struct gspca_dev *gspca_dev) 251 { 252 struct sd *sd = (struct sd *) gspca_dev; 253 254 /* initialize the JPEG header */ 255 jpeg_define(sd->jpeg_hdr, gspca_dev->pixfmt.height, 256 gspca_dev->pixfmt.width, 257 0x22); /* JPEG 411 */ 258 259 /* the JPEG quality shall be 85% */ 260 jpeg_set_qual(sd->jpeg_hdr, 85); 261 262 reg_r(gspca_dev, 0x00, 0x2520, 1); 263 msleep(8); 264 265 /* start the capture */ 266 wait_status_0(gspca_dev); 267 reg_w(gspca_dev, 0x31, 0x0000, 0x0004); /* start request */ 268 wait_status_1(gspca_dev); 269 wait_status_0(gspca_dev); 270 msleep(200); 271 272 sd->pkt_seq = 0; 273 return gspca_dev->usb_err; 274 } 275 276 static void sd_stopN(struct gspca_dev *gspca_dev) 277 { 278 /* stop the capture */ 279 wait_status_0(gspca_dev); 280 reg_w(gspca_dev, 0x31, 0x0000, 0x0000); /* stop request */ 281 wait_status_1(gspca_dev); 282 wait_status_0(gspca_dev); 283 } 284 285 /* move a packet adding 0x00 after 0xff */ 286 static void add_packet(struct gspca_dev *gspca_dev, 287 u8 *data, 288 int len) 289 { 290 int i; 291 292 i = 0; 293 do { 294 if (data[i] == 0xff) { 295 gspca_frame_add(gspca_dev, INTER_PACKET, 296 data, i + 1); 297 len -= i; 298 data += i; 299 *data = 0x00; 300 i = 0; 301 } 302 } while (++i < len); 303 gspca_frame_add(gspca_dev, INTER_PACKET, data, len); 304 } 305 306 static void sd_pkt_scan(struct gspca_dev *gspca_dev, 307 u8 *data, /* isoc packet */ 308 int len) /* iso packet length */ 309 { 310 struct sd *sd = (struct sd *) gspca_dev; 311 static const u8 ffd9[] = {0xff, 0xd9}; 312 313 /* image packets start with: 314 * 02 8n 315 * with <n> bit: 316 * 0x01: even (0) / odd (1) image 317 * 0x02: end of image when set 318 */ 319 if (len < 3) 320 return; /* empty packet */ 321 if (*data == 0x02) { 322 if (data[1] & 0x02) { 323 sd->pkt_seq = !(data[1] & 1); 324 add_packet(gspca_dev, data + 2, len - 2); 325 gspca_frame_add(gspca_dev, LAST_PACKET, 326 ffd9, 2); 327 return; 328 } 329 if ((data[1] & 1) != sd->pkt_seq) 330 goto err; 331 if (gspca_dev->last_packet_type == LAST_PACKET) 332 gspca_frame_add(gspca_dev, FIRST_PACKET, 333 sd->jpeg_hdr, JPEG_HDR_SZ); 334 add_packet(gspca_dev, data + 2, len - 2); 335 return; 336 } 337 err: 338 gspca_dev->last_packet_type = DISCARD_PACKET; 339 } 340 341 static int sd_s_ctrl(struct v4l2_ctrl *ctrl) 342 { 343 struct gspca_dev *gspca_dev = 344 container_of(ctrl->handler, struct gspca_dev, ctrl_handler); 345 346 gspca_dev->usb_err = 0; 347 348 if (!gspca_dev->streaming) 349 return 0; 350 351 switch (ctrl->id) { 352 case V4L2_CID_BRIGHTNESS: 353 setbrightness(gspca_dev, ctrl->val); 354 break; 355 case V4L2_CID_CONTRAST: 356 setcontrast(gspca_dev, ctrl->val); 357 break; 358 case V4L2_CID_HUE: 359 sethue(gspca_dev, ctrl->val); 360 break; 361 case V4L2_CID_SATURATION: 362 setcolor(gspca_dev, ctrl->val); 363 break; 364 case V4L2_CID_SHARPNESS: 365 setsharpness(gspca_dev, ctrl->val); 366 break; 367 } 368 return gspca_dev->usb_err; 369 } 370 371 static const struct v4l2_ctrl_ops sd_ctrl_ops = { 372 .s_ctrl = sd_s_ctrl, 373 }; 374 375 static int sd_init_controls(struct gspca_dev *gspca_dev) 376 { 377 struct v4l2_ctrl_handler *hdl = &gspca_dev->ctrl_handler; 378 379 gspca_dev->vdev.ctrl_handler = hdl; 380 v4l2_ctrl_handler_init(hdl, 5); 381 v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, 382 V4L2_CID_BRIGHTNESS, 0, 255, 1, 128); 383 v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, 384 V4L2_CID_CONTRAST, 0, 8, 1, 1); 385 v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, 386 V4L2_CID_HUE, 0, 255, 1, 0); 387 v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, 388 V4L2_CID_SATURATION, 0, 8, 1, 1); 389 v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, 390 V4L2_CID_SHARPNESS, 0, 255, 1, 0); 391 392 if (hdl->error) { 393 pr_err("Could not initialize controls\n"); 394 return hdl->error; 395 } 396 return 0; 397 } 398 399 /* sub-driver description */ 400 static const struct sd_desc sd_desc = { 401 .name = MODULE_NAME, 402 .config = sd_config, 403 .init = sd_init, 404 .init_controls = sd_init_controls, 405 .isoc_init = sd_isoc_init, 406 .start = sd_start, 407 .stopN = sd_stopN, 408 .pkt_scan = sd_pkt_scan, 409 }; 410 411 /* -- module initialisation -- */ 412 static const struct usb_device_id device_table[] = { 413 {USB_DEVICE(0x04fc, 0x1528)}, 414 {} 415 }; 416 MODULE_DEVICE_TABLE(usb, device_table); 417 418 /* -- device connect -- */ 419 static int sd_probe(struct usb_interface *intf, 420 const struct usb_device_id *id) 421 { 422 /* the video interface for isochronous transfer is 1 */ 423 if (intf->cur_altsetting->desc.bInterfaceNumber != 1) 424 return -ENODEV; 425 426 return gspca_dev_probe2(intf, id, &sd_desc, sizeof(struct sd), 427 THIS_MODULE); 428 } 429 430 static struct usb_driver sd_driver = { 431 .name = MODULE_NAME, 432 .id_table = device_table, 433 .probe = sd_probe, 434 .disconnect = gspca_disconnect, 435 #ifdef CONFIG_PM 436 .suspend = gspca_suspend, 437 .resume = gspca_resume, 438 .reset_resume = gspca_resume, 439 #endif 440 }; 441 442 module_usb_driver(sd_driver); 443