pac207.c 15 KB

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  1. /*
  2. * Pixart PAC207BCA library
  3. *
  4. * Copyright (C) 2008 Hans de Goede <hdgoede@redhat.com>
  5. * Copyright (C) 2005 Thomas Kaiser thomas@kaiser-linux.li
  6. * Copyleft (C) 2005 Michel Xhaard mxhaard@magic.fr
  7. *
  8. * V4L2 by Jean-Francois Moine <http://moinejf.free.fr>
  9. *
  10. * This program is free software; you can redistribute it and/or modify
  11. * it under the terms of the GNU General Public License as published by
  12. * the Free Software Foundation; either version 2 of the License, or
  13. * (at your option) any later version.
  14. *
  15. * This program is distributed in the hope that it will be useful,
  16. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  18. * GNU General Public License for more details.
  19. *
  20. * You should have received a copy of the GNU General Public License
  21. * along with this program; if not, write to the Free Software
  22. * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  23. *
  24. */
  25. #define MODULE_NAME "pac207"
  26. #include <linux/input.h>
  27. #include "gspca.h"
  28. MODULE_AUTHOR("Hans de Goede <hdgoede@redhat.com>");
  29. MODULE_DESCRIPTION("Pixart PAC207");
  30. MODULE_LICENSE("GPL");
  31. #define PAC207_CTRL_TIMEOUT 100 /* ms */
  32. #define PAC207_BRIGHTNESS_MIN 0
  33. #define PAC207_BRIGHTNESS_MAX 255
  34. #define PAC207_BRIGHTNESS_DEFAULT 46
  35. #define PAC207_EXPOSURE_MIN 3
  36. #define PAC207_EXPOSURE_MAX 26
  37. #define PAC207_EXPOSURE_DEFAULT 5 /* power on default: 3 */
  38. #define PAC207_EXPOSURE_KNEE 8 /* 4 = 30 fps, 11 = 8, 15 = 6 */
  39. #define PAC207_GAIN_MIN 0
  40. #define PAC207_GAIN_MAX 31
  41. #define PAC207_GAIN_DEFAULT 9 /* power on default: 9 */
  42. #define PAC207_GAIN_KNEE 31
  43. #define PAC207_AUTOGAIN_DEADZONE 30
  44. /* specific webcam descriptor */
  45. struct sd {
  46. struct gspca_dev gspca_dev; /* !! must be the first item */
  47. u8 mode;
  48. u8 brightness;
  49. u8 exposure;
  50. u8 autogain;
  51. u8 gain;
  52. u8 sof_read;
  53. u8 header_read;
  54. u8 autogain_ignore_frames;
  55. atomic_t avg_lum;
  56. };
  57. /* V4L2 controls supported by the driver */
  58. static int sd_setbrightness(struct gspca_dev *gspca_dev, __s32 val);
  59. static int sd_getbrightness(struct gspca_dev *gspca_dev, __s32 *val);
  60. static int sd_setexposure(struct gspca_dev *gspca_dev, __s32 val);
  61. static int sd_getexposure(struct gspca_dev *gspca_dev, __s32 *val);
  62. static int sd_setautogain(struct gspca_dev *gspca_dev, __s32 val);
  63. static int sd_getautogain(struct gspca_dev *gspca_dev, __s32 *val);
  64. static int sd_setgain(struct gspca_dev *gspca_dev, __s32 val);
  65. static int sd_getgain(struct gspca_dev *gspca_dev, __s32 *val);
  66. static const struct ctrl sd_ctrls[] = {
  67. #define SD_BRIGHTNESS 0
  68. {
  69. {
  70. .id = V4L2_CID_BRIGHTNESS,
  71. .type = V4L2_CTRL_TYPE_INTEGER,
  72. .name = "Brightness",
  73. .minimum = PAC207_BRIGHTNESS_MIN,
  74. .maximum = PAC207_BRIGHTNESS_MAX,
  75. .step = 1,
  76. .default_value = PAC207_BRIGHTNESS_DEFAULT,
  77. .flags = 0,
  78. },
  79. .set = sd_setbrightness,
  80. .get = sd_getbrightness,
  81. },
  82. #define SD_EXPOSURE 1
  83. {
  84. {
  85. .id = V4L2_CID_EXPOSURE,
  86. .type = V4L2_CTRL_TYPE_INTEGER,
  87. .name = "Exposure",
  88. .minimum = PAC207_EXPOSURE_MIN,
  89. .maximum = PAC207_EXPOSURE_MAX,
  90. .step = 1,
  91. .default_value = PAC207_EXPOSURE_DEFAULT,
  92. .flags = 0,
  93. },
  94. .set = sd_setexposure,
  95. .get = sd_getexposure,
  96. },
  97. #define SD_AUTOGAIN 2
  98. {
  99. {
  100. .id = V4L2_CID_AUTOGAIN,
  101. .type = V4L2_CTRL_TYPE_BOOLEAN,
  102. .name = "Auto Gain",
  103. .minimum = 0,
  104. .maximum = 1,
  105. .step = 1,
  106. #define AUTOGAIN_DEF 1
  107. .default_value = AUTOGAIN_DEF,
  108. .flags = 0,
  109. },
  110. .set = sd_setautogain,
  111. .get = sd_getautogain,
  112. },
  113. #define SD_GAIN 3
  114. {
  115. {
  116. .id = V4L2_CID_GAIN,
  117. .type = V4L2_CTRL_TYPE_INTEGER,
  118. .name = "Gain",
  119. .minimum = PAC207_GAIN_MIN,
  120. .maximum = PAC207_GAIN_MAX,
  121. .step = 1,
  122. .default_value = PAC207_GAIN_DEFAULT,
  123. .flags = 0,
  124. },
  125. .set = sd_setgain,
  126. .get = sd_getgain,
  127. },
  128. };
  129. static const struct v4l2_pix_format sif_mode[] = {
  130. {176, 144, V4L2_PIX_FMT_PAC207, V4L2_FIELD_NONE,
  131. .bytesperline = 176,
  132. .sizeimage = (176 + 2) * 144,
  133. /* uncompressed, add 2 bytes / line for line header */
  134. .colorspace = V4L2_COLORSPACE_SRGB,
  135. .priv = 1},
  136. {352, 288, V4L2_PIX_FMT_PAC207, V4L2_FIELD_NONE,
  137. .bytesperline = 352,
  138. /* compressed, but only when needed (not compressed
  139. when the framerate is low) */
  140. .sizeimage = (352 + 2) * 288,
  141. .colorspace = V4L2_COLORSPACE_SRGB,
  142. .priv = 0},
  143. };
  144. static const __u8 pac207_sensor_init[][8] = {
  145. {0x10, 0x12, 0x0d, 0x12, 0x0c, 0x01, 0x29, 0x84},
  146. {0x49, 0x64, 0x64, 0x64, 0x04, 0x10, 0xf0, 0x30},
  147. {0x00, 0x00, 0x00, 0x70, 0xa0, 0xf8, 0x00, 0x00},
  148. {0x32, 0x00, 0x96, 0x00, 0xA2, 0x02, 0xaf, 0x00},
  149. };
  150. static int pac207_write_regs(struct gspca_dev *gspca_dev, u16 index,
  151. const u8 *buffer, u16 length)
  152. {
  153. struct usb_device *udev = gspca_dev->dev;
  154. int err;
  155. memcpy(gspca_dev->usb_buf, buffer, length);
  156. err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x01,
  157. USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE,
  158. 0x00, index,
  159. gspca_dev->usb_buf, length, PAC207_CTRL_TIMEOUT);
  160. if (err < 0)
  161. PDEBUG(D_ERR,
  162. "Failed to write registers to index 0x%04X, error %d)",
  163. index, err);
  164. return err;
  165. }
  166. static int pac207_write_reg(struct gspca_dev *gspca_dev, u16 index, u16 value)
  167. {
  168. struct usb_device *udev = gspca_dev->dev;
  169. int err;
  170. err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00,
  171. USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE,
  172. value, index, NULL, 0, PAC207_CTRL_TIMEOUT);
  173. if (err)
  174. PDEBUG(D_ERR, "Failed to write a register (index 0x%04X,"
  175. " value 0x%02X, error %d)", index, value, err);
  176. return err;
  177. }
  178. static int pac207_read_reg(struct gspca_dev *gspca_dev, u16 index)
  179. {
  180. struct usb_device *udev = gspca_dev->dev;
  181. int res;
  182. res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x00,
  183. USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_INTERFACE,
  184. 0x00, index,
  185. gspca_dev->usb_buf, 1, PAC207_CTRL_TIMEOUT);
  186. if (res < 0) {
  187. PDEBUG(D_ERR,
  188. "Failed to read a register (index 0x%04X, error %d)",
  189. index, res);
  190. return res;
  191. }
  192. return gspca_dev->usb_buf[0];
  193. }
  194. /* this function is called at probe time */
  195. static int sd_config(struct gspca_dev *gspca_dev,
  196. const struct usb_device_id *id)
  197. {
  198. struct sd *sd = (struct sd *) gspca_dev;
  199. struct cam *cam;
  200. u8 idreg[2];
  201. idreg[0] = pac207_read_reg(gspca_dev, 0x0000);
  202. idreg[1] = pac207_read_reg(gspca_dev, 0x0001);
  203. idreg[0] = ((idreg[0] & 0x0F) << 4) | ((idreg[1] & 0xf0) >> 4);
  204. idreg[1] = idreg[1] & 0x0f;
  205. PDEBUG(D_PROBE, "Pixart Sensor ID 0x%02X Chips ID 0x%02X",
  206. idreg[0], idreg[1]);
  207. if (idreg[0] != 0x27) {
  208. PDEBUG(D_PROBE, "Error invalid sensor ID!");
  209. return -ENODEV;
  210. }
  211. PDEBUG(D_PROBE,
  212. "Pixart PAC207BCA Image Processor and Control Chip detected"
  213. " (vid/pid 0x%04X:0x%04X)", id->idVendor, id->idProduct);
  214. cam = &gspca_dev->cam;
  215. cam->cam_mode = sif_mode;
  216. cam->nmodes = ARRAY_SIZE(sif_mode);
  217. sd->brightness = PAC207_BRIGHTNESS_DEFAULT;
  218. sd->exposure = PAC207_EXPOSURE_DEFAULT;
  219. sd->gain = PAC207_GAIN_DEFAULT;
  220. sd->autogain = AUTOGAIN_DEF;
  221. return 0;
  222. }
  223. /* this function is called at probe and resume time */
  224. static int sd_init(struct gspca_dev *gspca_dev)
  225. {
  226. pac207_write_reg(gspca_dev, 0x41, 0x00);
  227. /* Bit_0=Image Format,
  228. * Bit_1=LED,
  229. * Bit_2=Compression test mode enable */
  230. pac207_write_reg(gspca_dev, 0x0f, 0x00); /* Power Control */
  231. return 0;
  232. }
  233. /* -- start the camera -- */
  234. static int sd_start(struct gspca_dev *gspca_dev)
  235. {
  236. struct sd *sd = (struct sd *) gspca_dev;
  237. __u8 mode;
  238. pac207_write_reg(gspca_dev, 0x0f, 0x10); /* Power control (Bit 6-0) */
  239. pac207_write_regs(gspca_dev, 0x0002, pac207_sensor_init[0], 8);
  240. pac207_write_regs(gspca_dev, 0x000a, pac207_sensor_init[1], 8);
  241. pac207_write_regs(gspca_dev, 0x0012, pac207_sensor_init[2], 8);
  242. pac207_write_regs(gspca_dev, 0x0042, pac207_sensor_init[3], 8);
  243. /* Compression Balance */
  244. if (gspca_dev->width == 176)
  245. pac207_write_reg(gspca_dev, 0x4a, 0xff);
  246. else
  247. pac207_write_reg(gspca_dev, 0x4a, 0x30);
  248. pac207_write_reg(gspca_dev, 0x4b, 0x00); /* Sram test value */
  249. pac207_write_reg(gspca_dev, 0x08, sd->brightness);
  250. /* PGA global gain (Bit 4-0) */
  251. pac207_write_reg(gspca_dev, 0x0e, sd->gain);
  252. pac207_write_reg(gspca_dev, 0x02, sd->exposure); /* PXCK = 12MHz /n */
  253. mode = 0x02; /* Image Format (Bit 0), LED (1), Compr. test mode (2) */
  254. if (gspca_dev->width == 176) { /* 176x144 */
  255. mode |= 0x01;
  256. PDEBUG(D_STREAM, "pac207_start mode 176x144");
  257. } else { /* 352x288 */
  258. PDEBUG(D_STREAM, "pac207_start mode 352x288");
  259. }
  260. pac207_write_reg(gspca_dev, 0x41, mode);
  261. pac207_write_reg(gspca_dev, 0x13, 0x01); /* Bit 0, auto clear */
  262. pac207_write_reg(gspca_dev, 0x1c, 0x01); /* not documented */
  263. msleep(10);
  264. pac207_write_reg(gspca_dev, 0x40, 0x01); /* Start ISO pipe */
  265. sd->sof_read = 0;
  266. sd->autogain_ignore_frames = 0;
  267. atomic_set(&sd->avg_lum, -1);
  268. return 0;
  269. }
  270. static void sd_stopN(struct gspca_dev *gspca_dev)
  271. {
  272. pac207_write_reg(gspca_dev, 0x40, 0x00); /* Stop ISO pipe */
  273. pac207_write_reg(gspca_dev, 0x41, 0x00); /* Turn of LED */
  274. pac207_write_reg(gspca_dev, 0x0f, 0x00); /* Power Control */
  275. }
  276. /* Include pac common sof detection functions */
  277. #include "pac_common.h"
  278. static void pac207_do_auto_gain(struct gspca_dev *gspca_dev)
  279. {
  280. struct sd *sd = (struct sd *) gspca_dev;
  281. int avg_lum = atomic_read(&sd->avg_lum);
  282. if (avg_lum == -1)
  283. return;
  284. if (sd->autogain_ignore_frames > 0)
  285. sd->autogain_ignore_frames--;
  286. else if (gspca_auto_gain_n_exposure(gspca_dev, avg_lum,
  287. 100, PAC207_AUTOGAIN_DEADZONE,
  288. PAC207_GAIN_KNEE, PAC207_EXPOSURE_KNEE))
  289. sd->autogain_ignore_frames = PAC_AUTOGAIN_IGNORE_FRAMES;
  290. }
  291. static void sd_pkt_scan(struct gspca_dev *gspca_dev,
  292. u8 *data,
  293. int len)
  294. {
  295. struct sd *sd = (struct sd *) gspca_dev;
  296. unsigned char *sof;
  297. sof = pac_find_sof(&sd->sof_read, data, len);
  298. if (sof) {
  299. int n;
  300. /* finish decoding current frame */
  301. n = sof - data;
  302. if (n > sizeof pac_sof_marker)
  303. n -= sizeof pac_sof_marker;
  304. else
  305. n = 0;
  306. gspca_frame_add(gspca_dev, LAST_PACKET,
  307. data, n);
  308. sd->header_read = 0;
  309. gspca_frame_add(gspca_dev, FIRST_PACKET, NULL, 0);
  310. len -= sof - data;
  311. data = sof;
  312. }
  313. if (sd->header_read < 11) {
  314. int needed;
  315. /* get average lumination from frame header (byte 5) */
  316. if (sd->header_read < 5) {
  317. needed = 5 - sd->header_read;
  318. if (len >= needed)
  319. atomic_set(&sd->avg_lum, data[needed - 1]);
  320. }
  321. /* skip the rest of the header */
  322. needed = 11 - sd->header_read;
  323. if (len <= needed) {
  324. sd->header_read += len;
  325. return;
  326. }
  327. data += needed;
  328. len -= needed;
  329. sd->header_read = 11;
  330. }
  331. gspca_frame_add(gspca_dev, INTER_PACKET, data, len);
  332. }
  333. static void setbrightness(struct gspca_dev *gspca_dev)
  334. {
  335. struct sd *sd = (struct sd *) gspca_dev;
  336. pac207_write_reg(gspca_dev, 0x08, sd->brightness);
  337. pac207_write_reg(gspca_dev, 0x13, 0x01); /* Bit 0, auto clear */
  338. pac207_write_reg(gspca_dev, 0x1c, 0x01); /* not documented */
  339. }
  340. static void setexposure(struct gspca_dev *gspca_dev)
  341. {
  342. struct sd *sd = (struct sd *) gspca_dev;
  343. pac207_write_reg(gspca_dev, 0x02, sd->exposure);
  344. pac207_write_reg(gspca_dev, 0x13, 0x01); /* Bit 0, auto clear */
  345. pac207_write_reg(gspca_dev, 0x1c, 0x01); /* not documented */
  346. }
  347. static void setgain(struct gspca_dev *gspca_dev)
  348. {
  349. struct sd *sd = (struct sd *) gspca_dev;
  350. pac207_write_reg(gspca_dev, 0x0e, sd->gain);
  351. pac207_write_reg(gspca_dev, 0x13, 0x01); /* Bit 0, auto clear */
  352. pac207_write_reg(gspca_dev, 0x1c, 0x01); /* not documented */
  353. }
  354. static int sd_setbrightness(struct gspca_dev *gspca_dev, __s32 val)
  355. {
  356. struct sd *sd = (struct sd *) gspca_dev;
  357. sd->brightness = val;
  358. if (gspca_dev->streaming)
  359. setbrightness(gspca_dev);
  360. return 0;
  361. }
  362. static int sd_getbrightness(struct gspca_dev *gspca_dev, __s32 *val)
  363. {
  364. struct sd *sd = (struct sd *) gspca_dev;
  365. *val = sd->brightness;
  366. return 0;
  367. }
  368. static int sd_setexposure(struct gspca_dev *gspca_dev, __s32 val)
  369. {
  370. struct sd *sd = (struct sd *) gspca_dev;
  371. sd->exposure = val;
  372. if (gspca_dev->streaming)
  373. setexposure(gspca_dev);
  374. return 0;
  375. }
  376. static int sd_getexposure(struct gspca_dev *gspca_dev, __s32 *val)
  377. {
  378. struct sd *sd = (struct sd *) gspca_dev;
  379. *val = sd->exposure;
  380. return 0;
  381. }
  382. static int sd_setgain(struct gspca_dev *gspca_dev, __s32 val)
  383. {
  384. struct sd *sd = (struct sd *) gspca_dev;
  385. sd->gain = val;
  386. if (gspca_dev->streaming)
  387. setgain(gspca_dev);
  388. return 0;
  389. }
  390. static int sd_getgain(struct gspca_dev *gspca_dev, __s32 *val)
  391. {
  392. struct sd *sd = (struct sd *) gspca_dev;
  393. *val = sd->gain;
  394. return 0;
  395. }
  396. static int sd_setautogain(struct gspca_dev *gspca_dev, __s32 val)
  397. {
  398. struct sd *sd = (struct sd *) gspca_dev;
  399. sd->autogain = val;
  400. /* when switching to autogain set defaults to make sure
  401. we are on a valid point of the autogain gain /
  402. exposure knee graph, and give this change time to
  403. take effect before doing autogain. */
  404. if (sd->autogain) {
  405. sd->exposure = PAC207_EXPOSURE_DEFAULT;
  406. sd->gain = PAC207_GAIN_DEFAULT;
  407. if (gspca_dev->streaming) {
  408. sd->autogain_ignore_frames =
  409. PAC_AUTOGAIN_IGNORE_FRAMES;
  410. setexposure(gspca_dev);
  411. setgain(gspca_dev);
  412. }
  413. }
  414. return 0;
  415. }
  416. static int sd_getautogain(struct gspca_dev *gspca_dev, __s32 *val)
  417. {
  418. struct sd *sd = (struct sd *) gspca_dev;
  419. *val = sd->autogain;
  420. return 0;
  421. }
  422. #ifdef CONFIG_INPUT
  423. static int sd_int_pkt_scan(struct gspca_dev *gspca_dev,
  424. u8 *data, /* interrupt packet data */
  425. int len) /* interrput packet length */
  426. {
  427. int ret = -EINVAL;
  428. if (len == 2 && data[0] == 0x5a && data[1] == 0x5a) {
  429. input_report_key(gspca_dev->input_dev, KEY_CAMERA, 1);
  430. input_sync(gspca_dev->input_dev);
  431. input_report_key(gspca_dev->input_dev, KEY_CAMERA, 0);
  432. input_sync(gspca_dev->input_dev);
  433. ret = 0;
  434. }
  435. return ret;
  436. }
  437. #endif
  438. /* sub-driver description */
  439. static const struct sd_desc sd_desc = {
  440. .name = MODULE_NAME,
  441. .ctrls = sd_ctrls,
  442. .nctrls = ARRAY_SIZE(sd_ctrls),
  443. .config = sd_config,
  444. .init = sd_init,
  445. .start = sd_start,
  446. .stopN = sd_stopN,
  447. .dq_callback = pac207_do_auto_gain,
  448. .pkt_scan = sd_pkt_scan,
  449. #ifdef CONFIG_INPUT
  450. .int_pkt_scan = sd_int_pkt_scan,
  451. #endif
  452. };
  453. /* -- module initialisation -- */
  454. static const __devinitdata struct usb_device_id device_table[] = {
  455. {USB_DEVICE(0x041e, 0x4028)},
  456. {USB_DEVICE(0x093a, 0x2460)},
  457. {USB_DEVICE(0x093a, 0x2461)},
  458. {USB_DEVICE(0x093a, 0x2463)},
  459. {USB_DEVICE(0x093a, 0x2464)},
  460. {USB_DEVICE(0x093a, 0x2468)},
  461. {USB_DEVICE(0x093a, 0x2470)},
  462. {USB_DEVICE(0x093a, 0x2471)},
  463. {USB_DEVICE(0x093a, 0x2472)},
  464. {USB_DEVICE(0x093a, 0x2474)},
  465. {USB_DEVICE(0x093a, 0x2476)},
  466. {USB_DEVICE(0x145f, 0x013a)},
  467. {USB_DEVICE(0x2001, 0xf115)},
  468. {}
  469. };
  470. MODULE_DEVICE_TABLE(usb, device_table);
  471. /* -- device connect -- */
  472. static int sd_probe(struct usb_interface *intf,
  473. const struct usb_device_id *id)
  474. {
  475. return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
  476. THIS_MODULE);
  477. }
  478. static struct usb_driver sd_driver = {
  479. .name = MODULE_NAME,
  480. .id_table = device_table,
  481. .probe = sd_probe,
  482. .disconnect = gspca_disconnect,
  483. #ifdef CONFIG_PM
  484. .suspend = gspca_suspend,
  485. .resume = gspca_resume,
  486. #endif
  487. };
  488. /* -- module insert / remove -- */
  489. static int __init sd_mod_init(void)
  490. {
  491. int ret;
  492. ret = usb_register(&sd_driver);
  493. if (ret < 0)
  494. return ret;
  495. PDEBUG(D_PROBE, "registered");
  496. return 0;
  497. }
  498. static void __exit sd_mod_exit(void)
  499. {
  500. usb_deregister(&sd_driver);
  501. PDEBUG(D_PROBE, "deregistered");
  502. }
  503. module_init(sd_mod_init);
  504. module_exit(sd_mod_exit);