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 PDEBUG(D_USBI, "GET %02x 0000 %04x %02x", 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 PDEBUG(D_USBO, "SET %02x %04x %04x", 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 PDEBUG(D_USBO, "SET %02x %04x %04x %02x", req, value, index, byte); 120 gspca_dev->usb_buf[0] = byte; 121 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 122 req, 123 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 124 value, index, 125 gspca_dev->usb_buf, 1, 500); 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 wait_status_0(struct gspca_dev *gspca_dev) 133 { 134 int i, w; 135 136 i = 16; 137 w = 0; 138 do { 139 reg_r(gspca_dev, 0x21, 0x0000, 1); 140 if (gspca_dev->usb_buf[0] == 0) 141 return; 142 w += 15; 143 msleep(w); 144 } while (--i > 0); 145 PERR("wait_status_0 timeout"); 146 gspca_dev->usb_err = -ETIME; 147 } 148 149 static void wait_status_1(struct gspca_dev *gspca_dev) 150 { 151 int i; 152 153 i = 10; 154 do { 155 reg_r(gspca_dev, 0x21, 0x0001, 1); 156 msleep(10); 157 if (gspca_dev->usb_buf[0] == 1) { 158 reg_wb(gspca_dev, 0x21, 0x0000, 0x0001, 0x00); 159 reg_r(gspca_dev, 0x21, 0x0001, 1); 160 return; 161 } 162 } while (--i > 0); 163 PERR("wait_status_1 timeout"); 164 gspca_dev->usb_err = -ETIME; 165 } 166 167 static void setbrightness(struct gspca_dev *gspca_dev, s32 val) 168 { 169 reg_wb(gspca_dev, 0xc0, 0x0000, 0x00c0, val); 170 } 171 172 static void setcontrast(struct gspca_dev *gspca_dev, s32 val) 173 { 174 reg_wb(gspca_dev, 0xc1, 0x0000, 0x00c1, val); 175 } 176 177 static void sethue(struct gspca_dev *gspca_dev, s32 val) 178 { 179 reg_wb(gspca_dev, 0xc2, 0x0000, 0x0000, val); 180 } 181 182 static void setcolor(struct gspca_dev *gspca_dev, s32 val) 183 { 184 reg_wb(gspca_dev, 0xc3, 0x0000, 0x00c3, val); 185 } 186 187 static void setsharpness(struct gspca_dev *gspca_dev, s32 val) 188 { 189 reg_wb(gspca_dev, 0xc4, 0x0000, 0x00c4, val); 190 } 191 192 /* this function is called at probe time */ 193 static int sd_config(struct gspca_dev *gspca_dev, 194 const struct usb_device_id *id) 195 { 196 gspca_dev->cam.cam_mode = vga_mode; 197 gspca_dev->cam.nmodes = ARRAY_SIZE(vga_mode); 198 gspca_dev->cam.npkt = 128; /* number of packets per ISOC message */ 199 /*fixme: 256 in ms-win traces*/ 200 201 return 0; 202 } 203 204 /* this function is called at probe and resume time */ 205 static int sd_init(struct gspca_dev *gspca_dev) 206 { 207 reg_w(gspca_dev, 0x00, 0x0001, 0x2067); 208 reg_w(gspca_dev, 0x00, 0x00d0, 0x206b); 209 reg_w(gspca_dev, 0x00, 0x0000, 0x206c); 210 reg_w(gspca_dev, 0x00, 0x0001, 0x2069); 211 msleep(8); 212 reg_w(gspca_dev, 0x00, 0x00c0, 0x206b); 213 reg_w(gspca_dev, 0x00, 0x0000, 0x206c); 214 reg_w(gspca_dev, 0x00, 0x0001, 0x2069); 215 216 reg_r(gspca_dev, 0x20, 0x0000, 1); 217 reg_r(gspca_dev, 0x20, 0x0000, 5); 218 reg_r(gspca_dev, 0x23, 0x0000, 64); 219 PDEBUG(D_PROBE, "%s%s", &gspca_dev->usb_buf[0x1c], 220 &gspca_dev->usb_buf[0x30]); 221 reg_r(gspca_dev, 0x23, 0x0001, 64); 222 return gspca_dev->usb_err; 223 } 224 225 /* function called at start time before URB creation */ 226 static int sd_isoc_init(struct gspca_dev *gspca_dev) 227 { 228 u8 mode; 229 230 reg_r(gspca_dev, 0x00, 0x2520, 1); 231 wait_status_0(gspca_dev); 232 reg_w(gspca_dev, 0xc5, 0x0003, 0x0000); 233 wait_status_1(gspca_dev); 234 235 wait_status_0(gspca_dev); 236 mode = gspca_dev->cam.cam_mode[gspca_dev->curr_mode].priv; 237 reg_wb(gspca_dev, 0x25, 0x0000, 0x0004, mode); 238 reg_r(gspca_dev, 0x25, 0x0004, 1); 239 reg_wb(gspca_dev, 0x27, 0x0000, 0x0000, 0x06); /* 420 */ 240 reg_r(gspca_dev, 0x27, 0x0000, 1); 241 242 /* not useful.. 243 gspca_dev->alt = 4; * use alternate setting 3 */ 244 245 return gspca_dev->usb_err; 246 } 247 248 /* -- start the camera -- */ 249 static int sd_start(struct gspca_dev *gspca_dev) 250 { 251 struct sd *sd = (struct sd *) gspca_dev; 252 253 /* initialize the JPEG header */ 254 jpeg_define(sd->jpeg_hdr, gspca_dev->pixfmt.height, 255 gspca_dev->pixfmt.width, 256 0x22); /* JPEG 411 */ 257 258 /* the JPEG quality shall be 85% */ 259 jpeg_set_qual(sd->jpeg_hdr, 85); 260 261 reg_r(gspca_dev, 0x00, 0x2520, 1); 262 msleep(8); 263 264 /* start the capture */ 265 wait_status_0(gspca_dev); 266 reg_w(gspca_dev, 0x31, 0x0000, 0x0004); /* start request */ 267 wait_status_1(gspca_dev); 268 wait_status_0(gspca_dev); 269 msleep(200); 270 271 sd->pkt_seq = 0; 272 return gspca_dev->usb_err; 273 } 274 275 static void sd_stopN(struct gspca_dev *gspca_dev) 276 { 277 /* stop the capture */ 278 wait_status_0(gspca_dev); 279 reg_w(gspca_dev, 0x31, 0x0000, 0x0000); /* stop request */ 280 wait_status_1(gspca_dev); 281 wait_status_0(gspca_dev); 282 } 283 284 /* move a packet adding 0x00 after 0xff */ 285 static void add_packet(struct gspca_dev *gspca_dev, 286 u8 *data, 287 int len) 288 { 289 int i; 290 291 i = 0; 292 do { 293 if (data[i] == 0xff) { 294 gspca_frame_add(gspca_dev, INTER_PACKET, 295 data, i + 1); 296 len -= i; 297 data += i; 298 *data = 0x00; 299 i = 0; 300 } 301 } while (++i < len); 302 gspca_frame_add(gspca_dev, INTER_PACKET, data, len); 303 } 304 305 static void sd_pkt_scan(struct gspca_dev *gspca_dev, 306 u8 *data, /* isoc packet */ 307 int len) /* iso packet length */ 308 { 309 struct sd *sd = (struct sd *) gspca_dev; 310 static const u8 ffd9[] = {0xff, 0xd9}; 311 312 /* image packets start with: 313 * 02 8n 314 * with <n> bit: 315 * 0x01: even (0) / odd (1) image 316 * 0x02: end of image when set 317 */ 318 if (len < 3) 319 return; /* empty packet */ 320 if (*data == 0x02) { 321 if (data[1] & 0x02) { 322 sd->pkt_seq = !(data[1] & 1); 323 add_packet(gspca_dev, data + 2, len - 2); 324 gspca_frame_add(gspca_dev, LAST_PACKET, 325 ffd9, 2); 326 return; 327 } 328 if ((data[1] & 1) != sd->pkt_seq) 329 goto err; 330 if (gspca_dev->last_packet_type == LAST_PACKET) 331 gspca_frame_add(gspca_dev, FIRST_PACKET, 332 sd->jpeg_hdr, JPEG_HDR_SZ); 333 add_packet(gspca_dev, data + 2, len - 2); 334 return; 335 } 336 err: 337 gspca_dev->last_packet_type = DISCARD_PACKET; 338 } 339 340 static int sd_s_ctrl(struct v4l2_ctrl *ctrl) 341 { 342 struct gspca_dev *gspca_dev = 343 container_of(ctrl->handler, struct gspca_dev, ctrl_handler); 344 345 gspca_dev->usb_err = 0; 346 347 if (!gspca_dev->streaming) 348 return 0; 349 350 switch (ctrl->id) { 351 case V4L2_CID_BRIGHTNESS: 352 setbrightness(gspca_dev, ctrl->val); 353 break; 354 case V4L2_CID_CONTRAST: 355 setcontrast(gspca_dev, ctrl->val); 356 break; 357 case V4L2_CID_HUE: 358 sethue(gspca_dev, ctrl->val); 359 break; 360 case V4L2_CID_SATURATION: 361 setcolor(gspca_dev, ctrl->val); 362 break; 363 case V4L2_CID_SHARPNESS: 364 setsharpness(gspca_dev, ctrl->val); 365 break; 366 } 367 return gspca_dev->usb_err; 368 } 369 370 static const struct v4l2_ctrl_ops sd_ctrl_ops = { 371 .s_ctrl = sd_s_ctrl, 372 }; 373 374 static int sd_init_controls(struct gspca_dev *gspca_dev) 375 { 376 struct v4l2_ctrl_handler *hdl = &gspca_dev->ctrl_handler; 377 378 gspca_dev->vdev.ctrl_handler = hdl; 379 v4l2_ctrl_handler_init(hdl, 5); 380 v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, 381 V4L2_CID_BRIGHTNESS, 0, 255, 1, 128); 382 v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, 383 V4L2_CID_CONTRAST, 0, 8, 1, 1); 384 v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, 385 V4L2_CID_HUE, 0, 255, 1, 0); 386 v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, 387 V4L2_CID_SATURATION, 0, 8, 1, 1); 388 v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, 389 V4L2_CID_SHARPNESS, 0, 255, 1, 0); 390 391 if (hdl->error) { 392 pr_err("Could not initialize controls\n"); 393 return hdl->error; 394 } 395 return 0; 396 } 397 398 /* sub-driver description */ 399 static const struct sd_desc sd_desc = { 400 .name = MODULE_NAME, 401 .config = sd_config, 402 .init = sd_init, 403 .init_controls = sd_init_controls, 404 .isoc_init = sd_isoc_init, 405 .start = sd_start, 406 .stopN = sd_stopN, 407 .pkt_scan = sd_pkt_scan, 408 }; 409 410 /* -- module initialisation -- */ 411 static const struct usb_device_id device_table[] = { 412 {USB_DEVICE(0x04fc, 0x1528)}, 413 {} 414 }; 415 MODULE_DEVICE_TABLE(usb, device_table); 416 417 /* -- device connect -- */ 418 static int sd_probe(struct usb_interface *intf, 419 const struct usb_device_id *id) 420 { 421 /* the video interface for isochronous transfer is 1 */ 422 if (intf->cur_altsetting->desc.bInterfaceNumber != 1) 423 return -ENODEV; 424 425 return gspca_dev_probe2(intf, id, &sd_desc, sizeof(struct sd), 426 THIS_MODULE); 427 } 428 429 static struct usb_driver sd_driver = { 430 .name = MODULE_NAME, 431 .id_table = device_table, 432 .probe = sd_probe, 433 .disconnect = gspca_disconnect, 434 #ifdef CONFIG_PM 435 .suspend = gspca_suspend, 436 .resume = gspca_resume, 437 .reset_resume = gspca_resume, 438 #endif 439 }; 440 441 module_usb_driver(sd_driver); 442