1 /* 2 * Syntek STK1135 subdriver 3 * 4 * Copyright (c) 2013 Ondrej Zary 5 * 6 * Based on Syntekdriver (stk11xx) by Nicolas VIVIEN: 7 * http://syntekdriver.sourceforge.net 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 */ 19 20 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 21 22 #define MODULE_NAME "stk1135" 23 24 #include "gspca.h" 25 #include "stk1135.h" 26 27 MODULE_AUTHOR("Ondrej Zary"); 28 MODULE_DESCRIPTION("Syntek STK1135 USB Camera Driver"); 29 MODULE_LICENSE("GPL"); 30 31 32 /* specific webcam descriptor */ 33 struct sd { 34 struct gspca_dev gspca_dev; /* !! must be the first item */ 35 36 u8 pkt_seq; 37 u8 sensor_page; 38 39 bool flip_status; 40 u8 flip_debounce; 41 42 struct v4l2_ctrl *hflip; 43 struct v4l2_ctrl *vflip; 44 }; 45 46 static const struct v4l2_pix_format stk1135_modes[] = { 47 /* default mode (this driver supports variable resolution) */ 48 {640, 480, V4L2_PIX_FMT_SBGGR8, V4L2_FIELD_NONE, 49 .bytesperline = 640, 50 .sizeimage = 640 * 480, 51 .colorspace = V4L2_COLORSPACE_SRGB}, 52 }; 53 54 /* -- read a register -- */ 55 static u8 reg_r(struct gspca_dev *gspca_dev, u16 index) 56 { 57 struct usb_device *dev = gspca_dev->dev; 58 int ret; 59 60 if (gspca_dev->usb_err < 0) 61 return 0; 62 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), 63 0x00, 64 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 65 0x00, 66 index, 67 gspca_dev->usb_buf, 1, 68 500); 69 70 PDEBUG(D_USBI, "reg_r 0x%x=0x%02x", index, gspca_dev->usb_buf[0]); 71 if (ret < 0) { 72 pr_err("reg_r 0x%x err %d\n", index, ret); 73 gspca_dev->usb_err = ret; 74 return 0; 75 } 76 77 return gspca_dev->usb_buf[0]; 78 } 79 80 /* -- write a register -- */ 81 static void reg_w(struct gspca_dev *gspca_dev, u16 index, u8 val) 82 { 83 int ret; 84 struct usb_device *dev = gspca_dev->dev; 85 86 if (gspca_dev->usb_err < 0) 87 return; 88 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 89 0x01, 90 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 91 val, 92 index, 93 NULL, 94 0, 95 500); 96 PDEBUG(D_USBO, "reg_w 0x%x:=0x%02x", index, val); 97 if (ret < 0) { 98 pr_err("reg_w 0x%x err %d\n", index, ret); 99 gspca_dev->usb_err = ret; 100 } 101 } 102 103 static void reg_w_mask(struct gspca_dev *gspca_dev, u16 index, u8 val, u8 mask) 104 { 105 val = (reg_r(gspca_dev, index) & ~mask) | (val & mask); 106 reg_w(gspca_dev, index, val); 107 } 108 109 /* this function is called at probe time */ 110 static int sd_config(struct gspca_dev *gspca_dev, 111 const struct usb_device_id *id) 112 { 113 gspca_dev->cam.cam_mode = stk1135_modes; 114 gspca_dev->cam.nmodes = ARRAY_SIZE(stk1135_modes); 115 return 0; 116 } 117 118 static int stk1135_serial_wait_ready(struct gspca_dev *gspca_dev) 119 { 120 int i = 0; 121 u8 val; 122 123 do { 124 val = reg_r(gspca_dev, STK1135_REG_SICTL + 1); 125 if (i++ > 500) { /* maximum retry count */ 126 pr_err("serial bus timeout: status=0x%02x\n", val); 127 return -1; 128 } 129 /* repeat if BUSY or WRITE/READ not finished */ 130 } while ((val & 0x10) || !(val & 0x05)); 131 132 return 0; 133 } 134 135 static u8 sensor_read_8(struct gspca_dev *gspca_dev, u8 addr) 136 { 137 reg_w(gspca_dev, STK1135_REG_SBUSR, addr); 138 /* begin read */ 139 reg_w(gspca_dev, STK1135_REG_SICTL, 0x20); 140 /* wait until finished */ 141 if (stk1135_serial_wait_ready(gspca_dev)) { 142 pr_err("Sensor read failed\n"); 143 return 0; 144 } 145 146 return reg_r(gspca_dev, STK1135_REG_SBUSR + 1); 147 } 148 149 static u16 sensor_read_16(struct gspca_dev *gspca_dev, u8 addr) 150 { 151 return (sensor_read_8(gspca_dev, addr) << 8) | 152 sensor_read_8(gspca_dev, 0xf1); 153 } 154 155 static void sensor_write_8(struct gspca_dev *gspca_dev, u8 addr, u8 data) 156 { 157 /* load address and data registers */ 158 reg_w(gspca_dev, STK1135_REG_SBUSW, addr); 159 reg_w(gspca_dev, STK1135_REG_SBUSW + 1, data); 160 /* begin write */ 161 reg_w(gspca_dev, STK1135_REG_SICTL, 0x01); 162 /* wait until finished */ 163 if (stk1135_serial_wait_ready(gspca_dev)) { 164 pr_err("Sensor write failed\n"); 165 return; 166 } 167 } 168 169 static void sensor_write_16(struct gspca_dev *gspca_dev, u8 addr, u16 data) 170 { 171 sensor_write_8(gspca_dev, addr, data >> 8); 172 sensor_write_8(gspca_dev, 0xf1, data & 0xff); 173 } 174 175 static void sensor_set_page(struct gspca_dev *gspca_dev, u8 page) 176 { 177 struct sd *sd = (struct sd *) gspca_dev; 178 179 if (page != sd->sensor_page) { 180 sensor_write_16(gspca_dev, 0xf0, page); 181 sd->sensor_page = page; 182 } 183 } 184 185 static u16 sensor_read(struct gspca_dev *gspca_dev, u16 reg) 186 { 187 sensor_set_page(gspca_dev, reg >> 8); 188 return sensor_read_16(gspca_dev, reg & 0xff); 189 } 190 191 static void sensor_write(struct gspca_dev *gspca_dev, u16 reg, u16 val) 192 { 193 sensor_set_page(gspca_dev, reg >> 8); 194 sensor_write_16(gspca_dev, reg & 0xff, val); 195 } 196 197 static void sensor_write_mask(struct gspca_dev *gspca_dev, 198 u16 reg, u16 val, u16 mask) 199 { 200 val = (sensor_read(gspca_dev, reg) & ~mask) | (val & mask); 201 sensor_write(gspca_dev, reg, val); 202 } 203 204 struct sensor_val { 205 u16 reg; 206 u16 val; 207 }; 208 209 /* configure MT9M112 sensor */ 210 static void stk1135_configure_mt9m112(struct gspca_dev *gspca_dev) 211 { 212 static const struct sensor_val cfg[] = { 213 /* restart&reset, chip enable, reserved */ 214 { 0x00d, 0x000b }, { 0x00d, 0x0008 }, { 0x035, 0x0022 }, 215 /* mode ctl: AWB on, AE both, clip aper corr, defect corr, AE */ 216 { 0x106, 0x700e }, 217 218 { 0x2dd, 0x18e0 }, /* B-R thresholds, */ 219 220 /* AWB */ 221 { 0x21f, 0x0180 }, /* Cb and Cr limits */ 222 { 0x220, 0xc814 }, { 0x221, 0x8080 }, /* lum limits, RGB gain */ 223 { 0x222, 0xa078 }, { 0x223, 0xa078 }, /* R, B limit */ 224 { 0x224, 0x5f20 }, { 0x228, 0xea02 }, /* mtx adj lim, adv ctl */ 225 { 0x229, 0x867a }, /* wide gates */ 226 227 /* Color correction */ 228 /* imager gains base, delta, delta signs */ 229 { 0x25e, 0x594c }, { 0x25f, 0x4d51 }, { 0x260, 0x0002 }, 230 /* AWB adv ctl 2, gain offs */ 231 { 0x2ef, 0x0008 }, { 0x2f2, 0x0000 }, 232 /* base matrix signs, scale K1-5, K6-9 */ 233 { 0x202, 0x00ee }, { 0x203, 0x3923 }, { 0x204, 0x0724 }, 234 /* base matrix coef */ 235 { 0x209, 0x00cd }, { 0x20a, 0x0093 }, { 0x20b, 0x0004 },/*K1-3*/ 236 { 0x20c, 0x005c }, { 0x20d, 0x00d9 }, { 0x20e, 0x0053 },/*K4-6*/ 237 { 0x20f, 0x0008 }, { 0x210, 0x0091 }, { 0x211, 0x00cf },/*K7-9*/ 238 { 0x215, 0x0000 }, /* delta mtx signs */ 239 /* delta matrix coef */ 240 { 0x216, 0x0000 }, { 0x217, 0x0000 }, { 0x218, 0x0000 },/*D1-3*/ 241 { 0x219, 0x0000 }, { 0x21a, 0x0000 }, { 0x21b, 0x0000 },/*D4-6*/ 242 { 0x21c, 0x0000 }, { 0x21d, 0x0000 }, { 0x21e, 0x0000 },/*D7-9*/ 243 /* enable & disable manual WB to apply color corr. settings */ 244 { 0x106, 0xf00e }, { 0x106, 0x700e }, 245 246 /* Lens shading correction */ 247 { 0x180, 0x0007 }, /* control */ 248 /* vertical knee 0, 2+1, 4+3 */ 249 { 0x181, 0xde13 }, { 0x182, 0xebe2 }, { 0x183, 0x00f6 }, /* R */ 250 { 0x184, 0xe114 }, { 0x185, 0xeadd }, { 0x186, 0xfdf6 }, /* G */ 251 { 0x187, 0xe511 }, { 0x188, 0xede6 }, { 0x189, 0xfbf7 }, /* B */ 252 /* horizontal knee 0, 2+1, 4+3, 5 */ 253 { 0x18a, 0xd613 }, { 0x18b, 0xedec }, /* R .. */ 254 { 0x18c, 0xf9f2 }, { 0x18d, 0x0000 }, /* .. R */ 255 { 0x18e, 0xd815 }, { 0x18f, 0xe9ea }, /* G .. */ 256 { 0x190, 0xf9f1 }, { 0x191, 0x0002 }, /* .. G */ 257 { 0x192, 0xde10 }, { 0x193, 0xefef }, /* B .. */ 258 { 0x194, 0xfbf4 }, { 0x195, 0x0002 }, /* .. B */ 259 /* vertical knee 6+5, 8+7 */ 260 { 0x1b6, 0x0e06 }, { 0x1b7, 0x2713 }, /* R */ 261 { 0x1b8, 0x1106 }, { 0x1b9, 0x2713 }, /* G */ 262 { 0x1ba, 0x0c03 }, { 0x1bb, 0x2a0f }, /* B */ 263 /* horizontal knee 7+6, 9+8, 10 */ 264 { 0x1bc, 0x1208 }, { 0x1bd, 0x1a16 }, { 0x1be, 0x0022 }, /* R */ 265 { 0x1bf, 0x150a }, { 0x1c0, 0x1c1a }, { 0x1c1, 0x002d }, /* G */ 266 { 0x1c2, 0x1109 }, { 0x1c3, 0x1414 }, { 0x1c4, 0x002a }, /* B */ 267 { 0x106, 0x740e }, /* enable lens shading correction */ 268 269 /* Gamma correction - context A */ 270 { 0x153, 0x0b03 }, { 0x154, 0x4722 }, { 0x155, 0xac82 }, 271 { 0x156, 0xdac7 }, { 0x157, 0xf5e9 }, { 0x158, 0xff00 }, 272 /* Gamma correction - context B */ 273 { 0x1dc, 0x0b03 }, { 0x1dd, 0x4722 }, { 0x1de, 0xac82 }, 274 { 0x1df, 0xdac7 }, { 0x1e0, 0xf5e9 }, { 0x1e1, 0xff00 }, 275 276 /* output format: RGB, invert output pixclock, output bayer */ 277 { 0x13a, 0x4300 }, { 0x19b, 0x4300 }, /* for context A, B */ 278 { 0x108, 0x0180 }, /* format control - enable bayer row flip */ 279 280 { 0x22f, 0xd100 }, { 0x29c, 0xd100 }, /* AE A, B */ 281 282 /* default prg conf, prg ctl - by 0x2d2, prg advance - PA1 */ 283 { 0x2d2, 0x0000 }, { 0x2cc, 0x0004 }, { 0x2cb, 0x0001 }, 284 285 { 0x22e, 0x0c3c }, { 0x267, 0x1010 }, /* AE tgt ctl, gain lim */ 286 287 /* PLL */ 288 { 0x065, 0xa000 }, /* clk ctl - enable PLL (clear bit 14) */ 289 { 0x066, 0x2003 }, { 0x067, 0x0501 }, /* PLL M=128, N=3, P=1 */ 290 { 0x065, 0x2000 }, /* disable PLL bypass (clear bit 15) */ 291 292 { 0x005, 0x01b8 }, { 0x007, 0x00d8 }, /* horiz blanking B, A */ 293 294 /* AE line size, shutter delay limit */ 295 { 0x239, 0x06c0 }, { 0x23b, 0x040e }, /* for context A */ 296 { 0x23a, 0x06c0 }, { 0x23c, 0x0564 }, /* for context B */ 297 /* shutter width basis 60Hz, 50Hz */ 298 { 0x257, 0x0208 }, { 0x258, 0x0271 }, /* for context A */ 299 { 0x259, 0x0209 }, { 0x25a, 0x0271 }, /* for context B */ 300 301 { 0x25c, 0x120d }, { 0x25d, 0x1712 }, /* flicker 60Hz, 50Hz */ 302 { 0x264, 0x5e1c }, /* reserved */ 303 /* flicker, AE gain limits, gain zone limits */ 304 { 0x25b, 0x0003 }, { 0x236, 0x7810 }, { 0x237, 0x8304 }, 305 306 { 0x008, 0x0021 }, /* vert blanking A */ 307 }; 308 int i; 309 u16 width, height; 310 311 for (i = 0; i < ARRAY_SIZE(cfg); i++) 312 sensor_write(gspca_dev, cfg[i].reg, cfg[i].val); 313 314 /* set output size */ 315 width = gspca_dev->pixfmt.width; 316 height = gspca_dev->pixfmt.height; 317 if (width <= 640 && height <= 512) { /* context A (half readout speed)*/ 318 sensor_write(gspca_dev, 0x1a7, width); 319 sensor_write(gspca_dev, 0x1aa, height); 320 /* set read mode context A */ 321 sensor_write(gspca_dev, 0x0c8, 0x0000); 322 /* set resize, read mode, vblank, hblank context A */ 323 sensor_write(gspca_dev, 0x2c8, 0x0000); 324 } else { /* context B (full readout speed) */ 325 sensor_write(gspca_dev, 0x1a1, width); 326 sensor_write(gspca_dev, 0x1a4, height); 327 /* set read mode context B */ 328 sensor_write(gspca_dev, 0x0c8, 0x0008); 329 /* set resize, read mode, vblank, hblank context B */ 330 sensor_write(gspca_dev, 0x2c8, 0x040b); 331 } 332 } 333 334 static void stk1135_configure_clock(struct gspca_dev *gspca_dev) 335 { 336 /* configure SCLKOUT */ 337 reg_w(gspca_dev, STK1135_REG_TMGEN, 0x12); 338 /* set 1 clock per pixel */ 339 /* and positive edge clocked pulse high when pixel counter = 0 */ 340 reg_w(gspca_dev, STK1135_REG_TCP1 + 0, 0x41); 341 reg_w(gspca_dev, STK1135_REG_TCP1 + 1, 0x00); 342 reg_w(gspca_dev, STK1135_REG_TCP1 + 2, 0x00); 343 reg_w(gspca_dev, STK1135_REG_TCP1 + 3, 0x00); 344 345 /* enable CLKOUT for sensor */ 346 reg_w(gspca_dev, STK1135_REG_SENSO + 0, 0x10); 347 /* disable STOP clock */ 348 reg_w(gspca_dev, STK1135_REG_SENSO + 1, 0x00); 349 /* set lower 8 bits of PLL feedback divider */ 350 reg_w(gspca_dev, STK1135_REG_SENSO + 3, 0x07); 351 /* set other PLL parameters */ 352 reg_w(gspca_dev, STK1135_REG_PLLFD, 0x06); 353 /* enable timing generator */ 354 reg_w(gspca_dev, STK1135_REG_TMGEN, 0x80); 355 /* enable PLL */ 356 reg_w(gspca_dev, STK1135_REG_SENSO + 2, 0x04); 357 358 /* set serial interface clock divider (30MHz/0x1f*16+2) = 60240 kHz) */ 359 reg_w(gspca_dev, STK1135_REG_SICTL + 2, 0x1f); 360 361 /* wait a while for sensor to catch up */ 362 udelay(1000); 363 } 364 365 static void stk1135_camera_disable(struct gspca_dev *gspca_dev) 366 { 367 /* set capture end Y position to 0 */ 368 reg_w(gspca_dev, STK1135_REG_CIEPO + 2, 0x00); 369 reg_w(gspca_dev, STK1135_REG_CIEPO + 3, 0x00); 370 /* disable capture */ 371 reg_w_mask(gspca_dev, STK1135_REG_SCTRL, 0x00, 0x80); 372 373 /* enable sensor standby and diasble chip enable */ 374 sensor_write_mask(gspca_dev, 0x00d, 0x0004, 0x000c); 375 376 /* disable PLL */ 377 reg_w_mask(gspca_dev, STK1135_REG_SENSO + 2, 0x00, 0x01); 378 /* disable timing generator */ 379 reg_w(gspca_dev, STK1135_REG_TMGEN, 0x00); 380 /* enable STOP clock */ 381 reg_w(gspca_dev, STK1135_REG_SENSO + 1, 0x20); 382 /* disable CLKOUT for sensor */ 383 reg_w(gspca_dev, STK1135_REG_SENSO, 0x00); 384 385 /* disable sensor (GPIO5) and enable GPIO0,3,6 (?) - sensor standby? */ 386 reg_w(gspca_dev, STK1135_REG_GCTRL, 0x49); 387 } 388 389 /* this function is called at probe and resume time */ 390 static int sd_init(struct gspca_dev *gspca_dev) 391 { 392 u16 sensor_id; 393 char *sensor_name; 394 struct sd *sd = (struct sd *) gspca_dev; 395 396 /* set GPIO3,4,5,6 direction to output */ 397 reg_w(gspca_dev, STK1135_REG_GCTRL + 2, 0x78); 398 /* enable sensor (GPIO5) */ 399 reg_w(gspca_dev, STK1135_REG_GCTRL, (1 << 5)); 400 /* disable ROM interface */ 401 reg_w(gspca_dev, STK1135_REG_GCTRL + 3, 0x80); 402 /* enable interrupts from GPIO8 (flip sensor) and GPIO9 (???) */ 403 reg_w(gspca_dev, STK1135_REG_ICTRL + 1, 0x00); 404 reg_w(gspca_dev, STK1135_REG_ICTRL + 3, 0x03); 405 /* enable remote wakeup from GPIO9 (???) */ 406 reg_w(gspca_dev, STK1135_REG_RMCTL + 1, 0x00); 407 reg_w(gspca_dev, STK1135_REG_RMCTL + 3, 0x02); 408 409 /* reset serial interface */ 410 reg_w(gspca_dev, STK1135_REG_SICTL, 0x80); 411 reg_w(gspca_dev, STK1135_REG_SICTL, 0x00); 412 /* set sensor address */ 413 reg_w(gspca_dev, STK1135_REG_SICTL + 3, 0xba); 414 /* disable alt 2-wire serial interface */ 415 reg_w(gspca_dev, STK1135_REG_ASIC + 3, 0x00); 416 417 stk1135_configure_clock(gspca_dev); 418 419 /* read sensor ID */ 420 sd->sensor_page = 0xff; 421 sensor_id = sensor_read(gspca_dev, 0x000); 422 423 switch (sensor_id) { 424 case 0x148c: 425 sensor_name = "MT9M112"; 426 break; 427 default: 428 sensor_name = "unknown"; 429 } 430 pr_info("Detected sensor type %s (0x%x)\n", sensor_name, sensor_id); 431 432 stk1135_camera_disable(gspca_dev); 433 434 return gspca_dev->usb_err; 435 } 436 437 /* -- start the camera -- */ 438 static int sd_start(struct gspca_dev *gspca_dev) 439 { 440 struct sd *sd = (struct sd *) gspca_dev; 441 u16 width, height; 442 443 /* enable sensor (GPIO5) */ 444 reg_w(gspca_dev, STK1135_REG_GCTRL, (1 << 5)); 445 446 stk1135_configure_clock(gspca_dev); 447 448 /* set capture start position X = 0, Y = 0 */ 449 reg_w(gspca_dev, STK1135_REG_CISPO + 0, 0x00); 450 reg_w(gspca_dev, STK1135_REG_CISPO + 1, 0x00); 451 reg_w(gspca_dev, STK1135_REG_CISPO + 2, 0x00); 452 reg_w(gspca_dev, STK1135_REG_CISPO + 3, 0x00); 453 454 /* set capture end position */ 455 width = gspca_dev->pixfmt.width; 456 height = gspca_dev->pixfmt.height; 457 reg_w(gspca_dev, STK1135_REG_CIEPO + 0, width & 0xff); 458 reg_w(gspca_dev, STK1135_REG_CIEPO + 1, width >> 8); 459 reg_w(gspca_dev, STK1135_REG_CIEPO + 2, height & 0xff); 460 reg_w(gspca_dev, STK1135_REG_CIEPO + 3, height >> 8); 461 462 /* set 8-bit mode */ 463 reg_w(gspca_dev, STK1135_REG_SCTRL, 0x20); 464 465 stk1135_configure_mt9m112(gspca_dev); 466 467 /* enable capture */ 468 reg_w_mask(gspca_dev, STK1135_REG_SCTRL, 0x80, 0x80); 469 470 if (gspca_dev->usb_err >= 0) 471 PDEBUG(D_STREAM, "camera started alt: 0x%02x", 472 gspca_dev->alt); 473 474 sd->pkt_seq = 0; 475 476 return gspca_dev->usb_err; 477 } 478 479 static void sd_stopN(struct gspca_dev *gspca_dev) 480 { 481 struct usb_device *dev = gspca_dev->dev; 482 483 usb_set_interface(dev, gspca_dev->iface, 0); 484 485 stk1135_camera_disable(gspca_dev); 486 487 PDEBUG(D_STREAM, "camera stopped"); 488 } 489 490 static void sd_pkt_scan(struct gspca_dev *gspca_dev, 491 u8 *data, /* isoc packet */ 492 int len) /* iso packet length */ 493 { 494 struct sd *sd = (struct sd *) gspca_dev; 495 int skip = sizeof(struct stk1135_pkt_header); 496 bool flip; 497 enum gspca_packet_type pkt_type = INTER_PACKET; 498 struct stk1135_pkt_header *hdr = (void *)data; 499 u8 seq; 500 501 if (len < 4) { 502 PDEBUG(D_PACK, "received short packet (less than 4 bytes)"); 503 return; 504 } 505 506 /* GPIO 8 is flip sensor (1 = normal position, 0 = flipped to back) */ 507 flip = !(le16_to_cpu(hdr->gpio) & (1 << 8)); 508 /* it's a switch, needs software debounce */ 509 if (sd->flip_status != flip) 510 sd->flip_debounce++; 511 else 512 sd->flip_debounce = 0; 513 514 /* check sequence number (not present in new frame packets) */ 515 if (!(hdr->flags & STK1135_HDR_FRAME_START)) { 516 seq = hdr->seq & STK1135_HDR_SEQ_MASK; 517 if (seq != sd->pkt_seq) { 518 PDEBUG(D_PACK, "received out-of-sequence packet"); 519 /* resync sequence and discard packet */ 520 sd->pkt_seq = seq; 521 gspca_dev->last_packet_type = DISCARD_PACKET; 522 return; 523 } 524 } 525 sd->pkt_seq++; 526 if (sd->pkt_seq > STK1135_HDR_SEQ_MASK) 527 sd->pkt_seq = 0; 528 529 if (len == sizeof(struct stk1135_pkt_header)) 530 return; 531 532 if (hdr->flags & STK1135_HDR_FRAME_START) { /* new frame */ 533 skip = 8; /* the header is longer */ 534 gspca_frame_add(gspca_dev, LAST_PACKET, data, 0); 535 pkt_type = FIRST_PACKET; 536 } 537 gspca_frame_add(gspca_dev, pkt_type, data + skip, len - skip); 538 } 539 540 static void sethflip(struct gspca_dev *gspca_dev, s32 val) 541 { 542 struct sd *sd = (struct sd *) gspca_dev; 543 544 if (sd->flip_status) 545 val = !val; 546 sensor_write_mask(gspca_dev, 0x020, val ? 0x0002 : 0x0000 , 0x0002); 547 } 548 549 static void setvflip(struct gspca_dev *gspca_dev, s32 val) 550 { 551 struct sd *sd = (struct sd *) gspca_dev; 552 553 if (sd->flip_status) 554 val = !val; 555 sensor_write_mask(gspca_dev, 0x020, val ? 0x0001 : 0x0000 , 0x0001); 556 } 557 558 static void stk1135_dq_callback(struct gspca_dev *gspca_dev) 559 { 560 struct sd *sd = (struct sd *) gspca_dev; 561 562 if (sd->flip_debounce > 100) { 563 sd->flip_status = !sd->flip_status; 564 sethflip(gspca_dev, v4l2_ctrl_g_ctrl(sd->hflip)); 565 setvflip(gspca_dev, v4l2_ctrl_g_ctrl(sd->vflip)); 566 } 567 } 568 569 static int sd_s_ctrl(struct v4l2_ctrl *ctrl) 570 { 571 struct gspca_dev *gspca_dev = 572 container_of(ctrl->handler, struct gspca_dev, ctrl_handler); 573 574 gspca_dev->usb_err = 0; 575 576 if (!gspca_dev->streaming) 577 return 0; 578 579 switch (ctrl->id) { 580 case V4L2_CID_HFLIP: 581 sethflip(gspca_dev, ctrl->val); 582 break; 583 case V4L2_CID_VFLIP: 584 setvflip(gspca_dev, ctrl->val); 585 break; 586 } 587 588 return gspca_dev->usb_err; 589 } 590 591 static const struct v4l2_ctrl_ops sd_ctrl_ops = { 592 .s_ctrl = sd_s_ctrl, 593 }; 594 595 static int sd_init_controls(struct gspca_dev *gspca_dev) 596 { 597 struct sd *sd = (struct sd *) gspca_dev; 598 struct v4l2_ctrl_handler *hdl = &gspca_dev->ctrl_handler; 599 600 gspca_dev->vdev.ctrl_handler = hdl; 601 v4l2_ctrl_handler_init(hdl, 2); 602 sd->hflip = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, 603 V4L2_CID_HFLIP, 0, 1, 1, 0); 604 sd->vflip = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, 605 V4L2_CID_VFLIP, 0, 1, 1, 0); 606 607 if (hdl->error) { 608 pr_err("Could not initialize controls\n"); 609 return hdl->error; 610 } 611 return 0; 612 } 613 614 static void stk1135_try_fmt(struct gspca_dev *gspca_dev, struct v4l2_format *fmt) 615 { 616 fmt->fmt.pix.width = clamp(fmt->fmt.pix.width, 32U, 1280U); 617 fmt->fmt.pix.height = clamp(fmt->fmt.pix.height, 32U, 1024U); 618 /* round up to even numbers */ 619 fmt->fmt.pix.width += (fmt->fmt.pix.width & 1); 620 fmt->fmt.pix.height += (fmt->fmt.pix.height & 1); 621 622 fmt->fmt.pix.bytesperline = fmt->fmt.pix.width; 623 fmt->fmt.pix.sizeimage = fmt->fmt.pix.width * fmt->fmt.pix.height; 624 } 625 626 static int stk1135_enum_framesizes(struct gspca_dev *gspca_dev, 627 struct v4l2_frmsizeenum *fsize) 628 { 629 if (fsize->index != 0 || fsize->pixel_format != V4L2_PIX_FMT_SBGGR8) 630 return -EINVAL; 631 632 fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE; 633 fsize->stepwise.min_width = 32; 634 fsize->stepwise.min_height = 32; 635 fsize->stepwise.max_width = 1280; 636 fsize->stepwise.max_height = 1024; 637 fsize->stepwise.step_width = 2; 638 fsize->stepwise.step_height = 2; 639 640 return 0; 641 } 642 643 /* sub-driver description */ 644 static const struct sd_desc sd_desc = { 645 .name = MODULE_NAME, 646 .config = sd_config, 647 .init = sd_init, 648 .init_controls = sd_init_controls, 649 .start = sd_start, 650 .stopN = sd_stopN, 651 .pkt_scan = sd_pkt_scan, 652 .dq_callback = stk1135_dq_callback, 653 .try_fmt = stk1135_try_fmt, 654 .enum_framesizes = stk1135_enum_framesizes, 655 }; 656 657 /* -- module initialisation -- */ 658 static const struct usb_device_id device_table[] = { 659 {USB_DEVICE(0x174f, 0x6a31)}, /* ASUS laptop, MT9M112 sensor */ 660 {} 661 }; 662 MODULE_DEVICE_TABLE(usb, device_table); 663 664 /* -- device connect -- */ 665 static int sd_probe(struct usb_interface *intf, 666 const struct usb_device_id *id) 667 { 668 return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd), 669 THIS_MODULE); 670 } 671 672 static struct usb_driver sd_driver = { 673 .name = MODULE_NAME, 674 .id_table = device_table, 675 .probe = sd_probe, 676 .disconnect = gspca_disconnect, 677 #ifdef CONFIG_PM 678 .suspend = gspca_suspend, 679 .resume = gspca_resume, 680 .reset_resume = gspca_resume, 681 #endif 682 }; 683 684 module_usb_driver(sd_driver); 685