Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | /* |
| 2 | Winbond w9966cf Webcam parport driver. |
| 3 | |
| 4 | Version 0.32 |
| 5 | |
| 6 | Copyright (C) 2001 Jakob Kemi <jakob.kemi@post.utfors.se> |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 2 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program; if not, write to the Free Software |
| 20 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 21 | */ |
| 22 | /* |
| 23 | Supported devices: |
| 24 | *Lifeview FlyCam Supra (using the Philips saa7111a chip) |
| 25 | |
| 26 | Does any other model using the w9966 interface chip exist ? |
| 27 | |
| 28 | Todo: |
| 29 | |
| 30 | *Add a working EPP mode, since DMA ECP read isn't implemented |
| 31 | in the parport drivers. (That's why it's so sloow) |
| 32 | |
| 33 | *Add support for other ccd-control chips than the saa7111 |
| 34 | please send me feedback on what kind of chips you have. |
| 35 | |
| 36 | *Add proper probing. I don't know what's wrong with the IEEE1284 |
| 37 | parport drivers but (IEEE1284_MODE_NIBBLE|IEEE1284_DEVICE_ID) |
| 38 | and nibble read seems to be broken for some peripherals. |
| 39 | |
| 40 | *Add probing for onboard SRAM, port directions etc. (if possible) |
| 41 | |
| 42 | *Add support for the hardware compressed modes (maybe using v4l2) |
| 43 | |
| 44 | *Fix better support for the capture window (no skewed images, v4l |
| 45 | interface to capt. window) |
| 46 | |
| 47 | *Probably some bugs that I don't know of |
| 48 | |
| 49 | Please support me by sending feedback! |
| 50 | |
| 51 | Changes: |
| 52 | |
| 53 | Alan Cox: Removed RGB mode for kernel merge, added THIS_MODULE |
| 54 | and owner support for newer module locks |
| 55 | */ |
| 56 | |
| 57 | #include <linux/module.h> |
| 58 | #include <linux/init.h> |
| 59 | #include <linux/delay.h> |
| 60 | #include <linux/videodev.h> |
| 61 | #include <linux/parport.h> |
| 62 | |
| 63 | //#define DEBUG // Undef me for production |
| 64 | |
| 65 | #ifdef DEBUG |
| 66 | #define DPRINTF(x, a...) printk(KERN_DEBUG "W9966: %s(): "x, __FUNCTION__ , ##a) |
| 67 | #else |
| 68 | #define DPRINTF(x...) |
| 69 | #endif |
| 70 | |
| 71 | /* |
| 72 | * Defines, simple typedefs etc. |
| 73 | */ |
| 74 | |
| 75 | #define W9966_DRIVERNAME "W9966CF Webcam" |
| 76 | #define W9966_MAXCAMS 4 // Maximum number of cameras |
| 77 | #define W9966_RBUFFER 2048 // Read buffer (must be an even number) |
| 78 | #define W9966_SRAMSIZE 131072 // 128kb |
| 79 | #define W9966_SRAMID 0x02 // check w9966cf.pdf |
| 80 | |
| 81 | // Empirically determined window limits |
| 82 | #define W9966_WND_MIN_X 16 |
| 83 | #define W9966_WND_MIN_Y 14 |
| 84 | #define W9966_WND_MAX_X 705 |
| 85 | #define W9966_WND_MAX_Y 253 |
| 86 | #define W9966_WND_MAX_W (W9966_WND_MAX_X - W9966_WND_MIN_X) |
| 87 | #define W9966_WND_MAX_H (W9966_WND_MAX_Y - W9966_WND_MIN_Y) |
| 88 | |
| 89 | // Keep track of our current state |
| 90 | #define W9966_STATE_PDEV 0x01 |
| 91 | #define W9966_STATE_CLAIMED 0x02 |
| 92 | #define W9966_STATE_VDEV 0x04 |
| 93 | |
| 94 | #define W9966_I2C_W_ID 0x48 |
| 95 | #define W9966_I2C_R_ID 0x49 |
| 96 | #define W9966_I2C_R_DATA 0x08 |
| 97 | #define W9966_I2C_R_CLOCK 0x04 |
| 98 | #define W9966_I2C_W_DATA 0x02 |
| 99 | #define W9966_I2C_W_CLOCK 0x01 |
| 100 | |
| 101 | struct w9966_dev { |
| 102 | unsigned char dev_state; |
| 103 | unsigned char i2c_state; |
| 104 | unsigned short ppmode; |
| 105 | struct parport* pport; |
| 106 | struct pardevice* pdev; |
| 107 | struct video_device vdev; |
| 108 | unsigned short width; |
| 109 | unsigned short height; |
| 110 | unsigned char brightness; |
| 111 | signed char contrast; |
| 112 | signed char color; |
| 113 | signed char hue; |
| 114 | }; |
| 115 | |
| 116 | /* |
| 117 | * Module specific properties |
| 118 | */ |
| 119 | |
| 120 | MODULE_AUTHOR("Jakob Kemi <jakob.kemi@post.utfors.se>"); |
| 121 | MODULE_DESCRIPTION("Winbond w9966cf WebCam driver (0.32)"); |
| 122 | MODULE_LICENSE("GPL"); |
| 123 | |
| 124 | |
| 125 | #ifdef MODULE |
| 126 | static const char* pardev[] = {[0 ... W9966_MAXCAMS] = ""}; |
| 127 | #else |
| 128 | static const char* pardev[] = {[0 ... W9966_MAXCAMS] = "aggressive"}; |
| 129 | #endif |
| 130 | module_param_array(pardev, charp, NULL, 0); |
| 131 | MODULE_PARM_DESC(pardev, "pardev: where to search for\n\ |
| 132 | \teach camera. 'aggressive' means brute-force search.\n\ |
| 133 | \tEg: >pardev=parport3,aggressive,parport2,parport1< would assign\n\ |
| 134 | \tcam 1 to parport3 and search every parport for cam 2 etc..."); |
| 135 | |
| 136 | static int parmode = 0; |
| 137 | module_param(parmode, int, 0); |
| 138 | MODULE_PARM_DESC(parmode, "parmode: transfer mode (0=auto, 1=ecp, 2=epp"); |
| 139 | |
| 140 | static int video_nr = -1; |
| 141 | module_param(video_nr, int, 0); |
| 142 | |
| 143 | /* |
| 144 | * Private data |
| 145 | */ |
| 146 | |
| 147 | static struct w9966_dev w9966_cams[W9966_MAXCAMS]; |
| 148 | |
| 149 | /* |
| 150 | * Private function declares |
| 151 | */ |
| 152 | |
| 153 | static inline void w9966_setState(struct w9966_dev* cam, int mask, int val); |
| 154 | static inline int w9966_getState(struct w9966_dev* cam, int mask, int val); |
| 155 | static inline void w9966_pdev_claim(struct w9966_dev *vdev); |
| 156 | static inline void w9966_pdev_release(struct w9966_dev *vdev); |
| 157 | |
| 158 | static int w9966_rReg(struct w9966_dev* cam, int reg); |
| 159 | static int w9966_wReg(struct w9966_dev* cam, int reg, int data); |
| 160 | #if 0 |
| 161 | static int w9966_rReg_i2c(struct w9966_dev* cam, int reg); |
| 162 | #endif |
| 163 | static int w9966_wReg_i2c(struct w9966_dev* cam, int reg, int data); |
| 164 | static int w9966_findlen(int near, int size, int maxlen); |
| 165 | static int w9966_calcscale(int size, int min, int max, int* beg, int* end, unsigned char* factor); |
| 166 | static int w9966_setup(struct w9966_dev* cam, int x1, int y1, int x2, int y2, int w, int h); |
| 167 | |
| 168 | static int w9966_init(struct w9966_dev* cam, struct parport* port); |
| 169 | static void w9966_term(struct w9966_dev* cam); |
| 170 | |
| 171 | static inline void w9966_i2c_setsda(struct w9966_dev* cam, int state); |
| 172 | static inline int w9966_i2c_setscl(struct w9966_dev* cam, int state); |
| 173 | static inline int w9966_i2c_getsda(struct w9966_dev* cam); |
| 174 | static inline int w9966_i2c_getscl(struct w9966_dev* cam); |
| 175 | static int w9966_i2c_wbyte(struct w9966_dev* cam, int data); |
| 176 | #if 0 |
| 177 | static int w9966_i2c_rbyte(struct w9966_dev* cam); |
| 178 | #endif |
| 179 | |
| 180 | static int w9966_v4l_ioctl(struct inode *inode, struct file *file, |
| 181 | unsigned int cmd, unsigned long arg); |
| 182 | static ssize_t w9966_v4l_read(struct file *file, char __user *buf, |
| 183 | size_t count, loff_t *ppos); |
| 184 | |
| 185 | static struct file_operations w9966_fops = { |
| 186 | .owner = THIS_MODULE, |
| 187 | .open = video_exclusive_open, |
| 188 | .release = video_exclusive_release, |
| 189 | .ioctl = w9966_v4l_ioctl, |
| 190 | .read = w9966_v4l_read, |
| 191 | .llseek = no_llseek, |
| 192 | }; |
| 193 | static struct video_device w9966_template = { |
| 194 | .owner = THIS_MODULE, |
| 195 | .name = W9966_DRIVERNAME, |
| 196 | .type = VID_TYPE_CAPTURE | VID_TYPE_SCALES, |
| 197 | .hardware = VID_HARDWARE_W9966, |
| 198 | .fops = &w9966_fops, |
| 199 | }; |
| 200 | |
| 201 | /* |
| 202 | * Private function defines |
| 203 | */ |
| 204 | |
| 205 | |
| 206 | // Set camera phase flags, so we know what to uninit when terminating |
| 207 | static inline void w9966_setState(struct w9966_dev* cam, int mask, int val) |
| 208 | { |
| 209 | cam->dev_state = (cam->dev_state & ~mask) ^ val; |
| 210 | } |
| 211 | |
| 212 | // Get camera phase flags |
| 213 | static inline int w9966_getState(struct w9966_dev* cam, int mask, int val) |
| 214 | { |
| 215 | return ((cam->dev_state & mask) == val); |
| 216 | } |
| 217 | |
| 218 | // Claim parport for ourself |
| 219 | static inline void w9966_pdev_claim(struct w9966_dev* cam) |
| 220 | { |
| 221 | if (w9966_getState(cam, W9966_STATE_CLAIMED, W9966_STATE_CLAIMED)) |
| 222 | return; |
| 223 | parport_claim_or_block(cam->pdev); |
| 224 | w9966_setState(cam, W9966_STATE_CLAIMED, W9966_STATE_CLAIMED); |
| 225 | } |
| 226 | |
| 227 | // Release parport for others to use |
| 228 | static inline void w9966_pdev_release(struct w9966_dev* cam) |
| 229 | { |
| 230 | if (w9966_getState(cam, W9966_STATE_CLAIMED, 0)) |
| 231 | return; |
| 232 | parport_release(cam->pdev); |
| 233 | w9966_setState(cam, W9966_STATE_CLAIMED, 0); |
| 234 | } |
| 235 | |
| 236 | // Read register from W9966 interface-chip |
| 237 | // Expects a claimed pdev |
| 238 | // -1 on error, else register data (byte) |
| 239 | static int w9966_rReg(struct w9966_dev* cam, int reg) |
| 240 | { |
| 241 | // ECP, read, regtransfer, REG, REG, REG, REG, REG |
| 242 | const unsigned char addr = 0x80 | (reg & 0x1f); |
| 243 | unsigned char val; |
| 244 | |
| 245 | if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_ADDR) != 0) |
| 246 | return -1; |
| 247 | if (parport_write(cam->pport, &addr, 1) != 1) |
| 248 | return -1; |
| 249 | if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_DATA) != 0) |
| 250 | return -1; |
| 251 | if (parport_read(cam->pport, &val, 1) != 1) |
| 252 | return -1; |
| 253 | |
| 254 | return val; |
| 255 | } |
| 256 | |
| 257 | // Write register to W9966 interface-chip |
| 258 | // Expects a claimed pdev |
| 259 | // -1 on error |
| 260 | static int w9966_wReg(struct w9966_dev* cam, int reg, int data) |
| 261 | { |
| 262 | // ECP, write, regtransfer, REG, REG, REG, REG, REG |
| 263 | const unsigned char addr = 0xc0 | (reg & 0x1f); |
| 264 | const unsigned char val = data; |
| 265 | |
| 266 | if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_ADDR) != 0) |
| 267 | return -1; |
| 268 | if (parport_write(cam->pport, &addr, 1) != 1) |
| 269 | return -1; |
| 270 | if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_DATA) != 0) |
| 271 | return -1; |
| 272 | if (parport_write(cam->pport, &val, 1) != 1) |
| 273 | return -1; |
| 274 | |
| 275 | return 0; |
| 276 | } |
| 277 | |
| 278 | // Initialize camera device. Setup all internal flags, set a |
| 279 | // default video mode, setup ccd-chip, register v4l device etc.. |
| 280 | // Also used for 'probing' of hardware. |
| 281 | // -1 on error |
| 282 | static int w9966_init(struct w9966_dev* cam, struct parport* port) |
| 283 | { |
| 284 | if (cam->dev_state != 0) |
| 285 | return -1; |
| 286 | |
| 287 | cam->pport = port; |
| 288 | cam->brightness = 128; |
| 289 | cam->contrast = 64; |
| 290 | cam->color = 64; |
| 291 | cam->hue = 0; |
| 292 | |
| 293 | // Select requested transfer mode |
| 294 | switch(parmode) |
| 295 | { |
| 296 | default: // Auto-detect (priority: hw-ecp, hw-epp, sw-ecp) |
| 297 | case 0: |
| 298 | if (port->modes & PARPORT_MODE_ECP) |
| 299 | cam->ppmode = IEEE1284_MODE_ECP; |
| 300 | else if (port->modes & PARPORT_MODE_EPP) |
| 301 | cam->ppmode = IEEE1284_MODE_EPP; |
| 302 | else |
| 303 | cam->ppmode = IEEE1284_MODE_ECP; |
| 304 | break; |
| 305 | case 1: // hw- or sw-ecp |
| 306 | cam->ppmode = IEEE1284_MODE_ECP; |
| 307 | break; |
| 308 | case 2: // hw- or sw-epp |
| 309 | cam->ppmode = IEEE1284_MODE_EPP; |
| 310 | break; |
| 311 | } |
| 312 | |
| 313 | // Tell the parport driver that we exists |
| 314 | cam->pdev = parport_register_device(port, "w9966", NULL, NULL, NULL, 0, NULL); |
| 315 | if (cam->pdev == NULL) { |
| 316 | DPRINTF("parport_register_device() failed\n"); |
| 317 | return -1; |
| 318 | } |
| 319 | w9966_setState(cam, W9966_STATE_PDEV, W9966_STATE_PDEV); |
| 320 | |
| 321 | w9966_pdev_claim(cam); |
| 322 | |
| 323 | // Setup a default capture mode |
| 324 | if (w9966_setup(cam, 0, 0, 1023, 1023, 200, 160) != 0) { |
| 325 | DPRINTF("w9966_setup() failed.\n"); |
| 326 | return -1; |
| 327 | } |
| 328 | |
| 329 | w9966_pdev_release(cam); |
| 330 | |
| 331 | // Fill in the video_device struct and register us to v4l |
| 332 | memcpy(&cam->vdev, &w9966_template, sizeof(struct video_device)); |
| 333 | cam->vdev.priv = cam; |
| 334 | |
| 335 | if (video_register_device(&cam->vdev, VFL_TYPE_GRABBER, video_nr) == -1) |
| 336 | return -1; |
| 337 | |
| 338 | w9966_setState(cam, W9966_STATE_VDEV, W9966_STATE_VDEV); |
| 339 | |
| 340 | // All ok |
| 341 | printk( |
| 342 | "w9966cf: Found and initialized a webcam on %s.\n", |
| 343 | cam->pport->name |
| 344 | ); |
| 345 | return 0; |
| 346 | } |
| 347 | |
| 348 | |
| 349 | // Terminate everything gracefully |
| 350 | static void w9966_term(struct w9966_dev* cam) |
| 351 | { |
| 352 | // Unregister from v4l |
| 353 | if (w9966_getState(cam, W9966_STATE_VDEV, W9966_STATE_VDEV)) { |
| 354 | video_unregister_device(&cam->vdev); |
| 355 | w9966_setState(cam, W9966_STATE_VDEV, 0); |
| 356 | } |
| 357 | |
| 358 | // Terminate from IEEE1284 mode and release pdev block |
| 359 | if (w9966_getState(cam, W9966_STATE_PDEV, W9966_STATE_PDEV)) { |
| 360 | w9966_pdev_claim(cam); |
| 361 | parport_negotiate(cam->pport, IEEE1284_MODE_COMPAT); |
| 362 | w9966_pdev_release(cam); |
| 363 | } |
| 364 | |
| 365 | // Unregister from parport |
| 366 | if (w9966_getState(cam, W9966_STATE_PDEV, W9966_STATE_PDEV)) { |
| 367 | parport_unregister_device(cam->pdev); |
| 368 | w9966_setState(cam, W9966_STATE_PDEV, 0); |
| 369 | } |
| 370 | } |
| 371 | |
| 372 | |
| 373 | // Find a good length for capture window (used both for W and H) |
| 374 | // A bit ugly but pretty functional. The capture length |
| 375 | // have to match the downscale |
| 376 | static int w9966_findlen(int near, int size, int maxlen) |
| 377 | { |
| 378 | int bestlen = size; |
| 379 | int besterr = abs(near - bestlen); |
| 380 | int len; |
| 381 | |
| 382 | for(len = size+1;len < maxlen;len++) |
| 383 | { |
| 384 | int err; |
| 385 | if ( ((64*size) %len) != 0) |
| 386 | continue; |
| 387 | |
| 388 | err = abs(near - len); |
| 389 | |
| 390 | // Only continue as long as we keep getting better values |
| 391 | if (err > besterr) |
| 392 | break; |
| 393 | |
| 394 | besterr = err; |
| 395 | bestlen = len; |
| 396 | } |
| 397 | |
| 398 | return bestlen; |
| 399 | } |
| 400 | |
| 401 | // Modify capture window (if necessary) |
| 402 | // and calculate downscaling |
| 403 | // Return -1 on error |
| 404 | static int w9966_calcscale(int size, int min, int max, int* beg, int* end, unsigned char* factor) |
| 405 | { |
| 406 | int maxlen = max - min; |
| 407 | int len = *end - *beg + 1; |
| 408 | int newlen = w9966_findlen(len, size, maxlen); |
| 409 | int err = newlen - len; |
| 410 | |
| 411 | // Check for bad format |
| 412 | if (newlen > maxlen || newlen < size) |
| 413 | return -1; |
| 414 | |
| 415 | // Set factor (6 bit fixed) |
| 416 | *factor = (64*size) / newlen; |
| 417 | if (*factor == 64) |
| 418 | *factor = 0x00; // downscale is disabled |
| 419 | else |
| 420 | *factor |= 0x80; // set downscale-enable bit |
| 421 | |
| 422 | // Modify old beginning and end |
| 423 | *beg -= err / 2; |
| 424 | *end += err - (err / 2); |
| 425 | |
| 426 | // Move window if outside borders |
| 427 | if (*beg < min) { |
| 428 | *end += min - *beg; |
| 429 | *beg += min - *beg; |
| 430 | } |
| 431 | if (*end > max) { |
| 432 | *beg -= *end - max; |
| 433 | *end -= *end - max; |
| 434 | } |
| 435 | |
| 436 | return 0; |
| 437 | } |
| 438 | |
| 439 | // Setup the cameras capture window etc. |
| 440 | // Expects a claimed pdev |
| 441 | // return -1 on error |
| 442 | static int w9966_setup(struct w9966_dev* cam, int x1, int y1, int x2, int y2, int w, int h) |
| 443 | { |
| 444 | unsigned int i; |
| 445 | unsigned int enh_s, enh_e; |
| 446 | unsigned char scale_x, scale_y; |
| 447 | unsigned char regs[0x1c]; |
| 448 | unsigned char saa7111_regs[] = { |
| 449 | 0x21, 0x00, 0xd8, 0x23, 0x00, 0x80, 0x80, 0x00, |
| 450 | 0x88, 0x10, 0x80, 0x40, 0x40, 0x00, 0x01, 0x00, |
| 451 | 0x48, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 452 | 0x00, 0x00, 0x00, 0x71, 0xe7, 0x00, 0x00, 0xc0 |
| 453 | }; |
| 454 | |
| 455 | |
| 456 | if (w*h*2 > W9966_SRAMSIZE) |
| 457 | { |
| 458 | DPRINTF("capture window exceeds SRAM size!.\n"); |
| 459 | w = 200; h = 160; // Pick default values |
| 460 | } |
| 461 | |
| 462 | w &= ~0x1; |
| 463 | if (w < 2) w = 2; |
| 464 | if (h < 1) h = 1; |
| 465 | if (w > W9966_WND_MAX_W) w = W9966_WND_MAX_W; |
| 466 | if (h > W9966_WND_MAX_H) h = W9966_WND_MAX_H; |
| 467 | |
| 468 | cam->width = w; |
| 469 | cam->height = h; |
| 470 | |
| 471 | enh_s = 0; |
| 472 | enh_e = w*h*2; |
| 473 | |
| 474 | // Modify capture window if necessary and calculate downscaling |
| 475 | if ( |
| 476 | w9966_calcscale(w, W9966_WND_MIN_X, W9966_WND_MAX_X, &x1, &x2, &scale_x) != 0 || |
| 477 | w9966_calcscale(h, W9966_WND_MIN_Y, W9966_WND_MAX_Y, &y1, &y2, &scale_y) != 0 |
| 478 | ) return -1; |
| 479 | |
| 480 | DPRINTF( |
| 481 | "%dx%d, x: %d<->%d, y: %d<->%d, sx: %d/64, sy: %d/64.\n", |
| 482 | w, h, x1, x2, y1, y2, scale_x&~0x80, scale_y&~0x80 |
| 483 | ); |
| 484 | |
| 485 | // Setup registers |
| 486 | regs[0x00] = 0x00; // Set normal operation |
| 487 | regs[0x01] = 0x18; // Capture mode |
| 488 | regs[0x02] = scale_y; // V-scaling |
| 489 | regs[0x03] = scale_x; // H-scaling |
| 490 | |
| 491 | // Capture window |
| 492 | regs[0x04] = (x1 & 0x0ff); // X-start (8 low bits) |
| 493 | regs[0x05] = (x1 & 0x300)>>8; // X-start (2 high bits) |
| 494 | regs[0x06] = (y1 & 0x0ff); // Y-start (8 low bits) |
| 495 | regs[0x07] = (y1 & 0x300)>>8; // Y-start (2 high bits) |
| 496 | regs[0x08] = (x2 & 0x0ff); // X-end (8 low bits) |
| 497 | regs[0x09] = (x2 & 0x300)>>8; // X-end (2 high bits) |
| 498 | regs[0x0a] = (y2 & 0x0ff); // Y-end (8 low bits) |
| 499 | |
| 500 | regs[0x0c] = W9966_SRAMID; // SRAM-banks (1x 128kb) |
| 501 | |
| 502 | // Enhancement layer |
| 503 | regs[0x0d] = (enh_s& 0x000ff); // Enh. start (0-7) |
| 504 | regs[0x0e] = (enh_s& 0x0ff00)>>8; // Enh. start (8-15) |
| 505 | regs[0x0f] = (enh_s& 0x70000)>>16; // Enh. start (16-17/18??) |
| 506 | regs[0x10] = (enh_e& 0x000ff); // Enh. end (0-7) |
| 507 | regs[0x11] = (enh_e& 0x0ff00)>>8; // Enh. end (8-15) |
| 508 | regs[0x12] = (enh_e& 0x70000)>>16; // Enh. end (16-17/18??) |
| 509 | |
| 510 | // Misc |
| 511 | regs[0x13] = 0x40; // VEE control (raw 4:2:2) |
| 512 | regs[0x17] = 0x00; // ??? |
| 513 | regs[0x18] = cam->i2c_state = 0x00; // Serial bus |
| 514 | regs[0x19] = 0xff; // I/O port direction control |
| 515 | regs[0x1a] = 0xff; // I/O port data register |
| 516 | regs[0x1b] = 0x10; // ??? |
| 517 | |
| 518 | // SAA7111 chip settings |
| 519 | saa7111_regs[0x0a] = cam->brightness; |
| 520 | saa7111_regs[0x0b] = cam->contrast; |
| 521 | saa7111_regs[0x0c] = cam->color; |
| 522 | saa7111_regs[0x0d] = cam->hue; |
| 523 | |
| 524 | // Reset (ECP-fifo & serial-bus) |
| 525 | if (w9966_wReg(cam, 0x00, 0x03) == -1) |
| 526 | return -1; |
| 527 | |
| 528 | // Write regs to w9966cf chip |
| 529 | for (i = 0; i < 0x1c; i++) |
| 530 | if (w9966_wReg(cam, i, regs[i]) == -1) |
| 531 | return -1; |
| 532 | |
| 533 | // Write regs to saa7111 chip |
| 534 | for (i = 0; i < 0x20; i++) |
| 535 | if (w9966_wReg_i2c(cam, i, saa7111_regs[i]) == -1) |
| 536 | return -1; |
| 537 | |
| 538 | return 0; |
| 539 | } |
| 540 | |
| 541 | /* |
| 542 | * Ugly and primitive i2c protocol functions |
| 543 | */ |
| 544 | |
| 545 | // Sets the data line on the i2c bus. |
| 546 | // Expects a claimed pdev. |
| 547 | static inline void w9966_i2c_setsda(struct w9966_dev* cam, int state) |
| 548 | { |
| 549 | if (state) |
| 550 | cam->i2c_state |= W9966_I2C_W_DATA; |
| 551 | else |
| 552 | cam->i2c_state &= ~W9966_I2C_W_DATA; |
| 553 | |
| 554 | w9966_wReg(cam, 0x18, cam->i2c_state); |
| 555 | udelay(5); |
| 556 | } |
| 557 | |
| 558 | // Get peripheral clock line |
| 559 | // Expects a claimed pdev. |
| 560 | static inline int w9966_i2c_getscl(struct w9966_dev* cam) |
| 561 | { |
| 562 | const unsigned char state = w9966_rReg(cam, 0x18); |
| 563 | return ((state & W9966_I2C_R_CLOCK) > 0); |
| 564 | } |
| 565 | |
| 566 | // Sets the clock line on the i2c bus. |
| 567 | // Expects a claimed pdev. -1 on error |
| 568 | static inline int w9966_i2c_setscl(struct w9966_dev* cam, int state) |
| 569 | { |
| 570 | unsigned long timeout; |
| 571 | |
| 572 | if (state) |
| 573 | cam->i2c_state |= W9966_I2C_W_CLOCK; |
| 574 | else |
| 575 | cam->i2c_state &= ~W9966_I2C_W_CLOCK; |
| 576 | |
| 577 | w9966_wReg(cam, 0x18, cam->i2c_state); |
| 578 | udelay(5); |
| 579 | |
| 580 | // we go to high, we also expect the peripheral to ack. |
| 581 | if (state) { |
| 582 | timeout = jiffies + 100; |
| 583 | while (!w9966_i2c_getscl(cam)) { |
| 584 | if (time_after(jiffies, timeout)) |
| 585 | return -1; |
| 586 | } |
| 587 | } |
| 588 | return 0; |
| 589 | } |
| 590 | |
| 591 | // Get peripheral data line |
| 592 | // Expects a claimed pdev. |
| 593 | static inline int w9966_i2c_getsda(struct w9966_dev* cam) |
| 594 | { |
| 595 | const unsigned char state = w9966_rReg(cam, 0x18); |
| 596 | return ((state & W9966_I2C_R_DATA) > 0); |
| 597 | } |
| 598 | |
| 599 | // Write a byte with ack to the i2c bus. |
| 600 | // Expects a claimed pdev. -1 on error |
| 601 | static int w9966_i2c_wbyte(struct w9966_dev* cam, int data) |
| 602 | { |
| 603 | int i; |
| 604 | for (i = 7; i >= 0; i--) |
| 605 | { |
| 606 | w9966_i2c_setsda(cam, (data >> i) & 0x01); |
| 607 | |
| 608 | if (w9966_i2c_setscl(cam, 1) == -1) |
| 609 | return -1; |
| 610 | w9966_i2c_setscl(cam, 0); |
| 611 | } |
| 612 | |
| 613 | w9966_i2c_setsda(cam, 1); |
| 614 | |
| 615 | if (w9966_i2c_setscl(cam, 1) == -1) |
| 616 | return -1; |
| 617 | w9966_i2c_setscl(cam, 0); |
| 618 | |
| 619 | return 0; |
| 620 | } |
| 621 | |
| 622 | // Read a data byte with ack from the i2c-bus |
| 623 | // Expects a claimed pdev. -1 on error |
| 624 | #if 0 |
| 625 | static int w9966_i2c_rbyte(struct w9966_dev* cam) |
| 626 | { |
| 627 | unsigned char data = 0x00; |
| 628 | int i; |
| 629 | |
| 630 | w9966_i2c_setsda(cam, 1); |
| 631 | |
| 632 | for (i = 0; i < 8; i++) |
| 633 | { |
| 634 | if (w9966_i2c_setscl(cam, 1) == -1) |
| 635 | return -1; |
| 636 | data = data << 1; |
| 637 | if (w9966_i2c_getsda(cam)) |
| 638 | data |= 0x01; |
| 639 | |
| 640 | w9966_i2c_setscl(cam, 0); |
| 641 | } |
| 642 | return data; |
| 643 | } |
| 644 | #endif |
| 645 | |
| 646 | // Read a register from the i2c device. |
| 647 | // Expects claimed pdev. -1 on error |
| 648 | #if 0 |
| 649 | static int w9966_rReg_i2c(struct w9966_dev* cam, int reg) |
| 650 | { |
| 651 | int data; |
| 652 | |
| 653 | w9966_i2c_setsda(cam, 0); |
| 654 | w9966_i2c_setscl(cam, 0); |
| 655 | |
| 656 | if ( |
| 657 | w9966_i2c_wbyte(cam, W9966_I2C_W_ID) == -1 || |
| 658 | w9966_i2c_wbyte(cam, reg) == -1 |
| 659 | ) |
| 660 | return -1; |
| 661 | |
| 662 | w9966_i2c_setsda(cam, 1); |
| 663 | if (w9966_i2c_setscl(cam, 1) == -1) |
| 664 | return -1; |
| 665 | w9966_i2c_setsda(cam, 0); |
| 666 | w9966_i2c_setscl(cam, 0); |
| 667 | |
| 668 | if ( |
| 669 | w9966_i2c_wbyte(cam, W9966_I2C_R_ID) == -1 || |
| 670 | (data = w9966_i2c_rbyte(cam)) == -1 |
| 671 | ) |
| 672 | return -1; |
| 673 | |
| 674 | w9966_i2c_setsda(cam, 0); |
| 675 | |
| 676 | if (w9966_i2c_setscl(cam, 1) == -1) |
| 677 | return -1; |
| 678 | w9966_i2c_setsda(cam, 1); |
| 679 | |
| 680 | return data; |
| 681 | } |
| 682 | #endif |
| 683 | |
| 684 | // Write a register to the i2c device. |
| 685 | // Expects claimed pdev. -1 on error |
| 686 | static int w9966_wReg_i2c(struct w9966_dev* cam, int reg, int data) |
| 687 | { |
| 688 | w9966_i2c_setsda(cam, 0); |
| 689 | w9966_i2c_setscl(cam, 0); |
| 690 | |
| 691 | if ( |
| 692 | w9966_i2c_wbyte(cam, W9966_I2C_W_ID) == -1 || |
| 693 | w9966_i2c_wbyte(cam, reg) == -1 || |
| 694 | w9966_i2c_wbyte(cam, data) == -1 |
| 695 | ) |
| 696 | return -1; |
| 697 | |
| 698 | w9966_i2c_setsda(cam, 0); |
| 699 | if (w9966_i2c_setscl(cam, 1) == -1) |
| 700 | return -1; |
| 701 | |
| 702 | w9966_i2c_setsda(cam, 1); |
| 703 | |
| 704 | return 0; |
| 705 | } |
| 706 | |
| 707 | /* |
| 708 | * Video4linux interfacing |
| 709 | */ |
| 710 | |
| 711 | static int w9966_v4l_do_ioctl(struct inode *inode, struct file *file, |
| 712 | unsigned int cmd, void *arg) |
| 713 | { |
| 714 | struct video_device *vdev = video_devdata(file); |
| 715 | struct w9966_dev *cam = vdev->priv; |
| 716 | |
| 717 | switch(cmd) |
| 718 | { |
| 719 | case VIDIOCGCAP: |
| 720 | { |
| 721 | static struct video_capability vcap = { |
| 722 | .name = W9966_DRIVERNAME, |
| 723 | .type = VID_TYPE_CAPTURE | VID_TYPE_SCALES, |
| 724 | .channels = 1, |
| 725 | .maxwidth = W9966_WND_MAX_W, |
| 726 | .maxheight = W9966_WND_MAX_H, |
| 727 | .minwidth = 2, |
| 728 | .minheight = 1, |
| 729 | }; |
| 730 | struct video_capability *cap = arg; |
| 731 | *cap = vcap; |
| 732 | return 0; |
| 733 | } |
| 734 | case VIDIOCGCHAN: |
| 735 | { |
| 736 | struct video_channel *vch = arg; |
| 737 | if(vch->channel != 0) // We only support one channel (#0) |
| 738 | return -EINVAL; |
| 739 | memset(vch,0,sizeof(*vch)); |
| 740 | strcpy(vch->name, "CCD-input"); |
| 741 | vch->type = VIDEO_TYPE_CAMERA; |
| 742 | return 0; |
| 743 | } |
| 744 | case VIDIOCSCHAN: |
| 745 | { |
| 746 | struct video_channel *vch = arg; |
| 747 | if(vch->channel != 0) |
| 748 | return -EINVAL; |
| 749 | return 0; |
| 750 | } |
| 751 | case VIDIOCGTUNER: |
| 752 | { |
| 753 | struct video_tuner *vtune = arg; |
| 754 | if(vtune->tuner != 0) |
| 755 | return -EINVAL; |
| 756 | strcpy(vtune->name, "no tuner"); |
| 757 | vtune->rangelow = 0; |
| 758 | vtune->rangehigh = 0; |
| 759 | vtune->flags = VIDEO_TUNER_NORM; |
| 760 | vtune->mode = VIDEO_MODE_AUTO; |
| 761 | vtune->signal = 0xffff; |
| 762 | return 0; |
| 763 | } |
| 764 | case VIDIOCSTUNER: |
| 765 | { |
| 766 | struct video_tuner *vtune = arg; |
| 767 | if (vtune->tuner != 0) |
| 768 | return -EINVAL; |
| 769 | if (vtune->mode != VIDEO_MODE_AUTO) |
| 770 | return -EINVAL; |
| 771 | return 0; |
| 772 | } |
| 773 | case VIDIOCGPICT: |
| 774 | { |
| 775 | struct video_picture vpic = { |
| 776 | cam->brightness << 8, // brightness |
| 777 | (cam->hue + 128) << 8, // hue |
| 778 | cam->color << 9, // color |
| 779 | cam->contrast << 9, // contrast |
| 780 | 0x8000, // whiteness |
| 781 | 16, VIDEO_PALETTE_YUV422// bpp, palette format |
| 782 | }; |
| 783 | struct video_picture *pic = arg; |
| 784 | *pic = vpic; |
| 785 | return 0; |
| 786 | } |
| 787 | case VIDIOCSPICT: |
| 788 | { |
| 789 | struct video_picture *vpic = arg; |
| 790 | if (vpic->depth != 16 || vpic->palette != VIDEO_PALETTE_YUV422) |
| 791 | return -EINVAL; |
| 792 | |
| 793 | cam->brightness = vpic->brightness >> 8; |
| 794 | cam->hue = (vpic->hue >> 8) - 128; |
| 795 | cam->color = vpic->colour >> 9; |
| 796 | cam->contrast = vpic->contrast >> 9; |
| 797 | |
| 798 | w9966_pdev_claim(cam); |
| 799 | |
| 800 | if ( |
| 801 | w9966_wReg_i2c(cam, 0x0a, cam->brightness) == -1 || |
| 802 | w9966_wReg_i2c(cam, 0x0b, cam->contrast) == -1 || |
| 803 | w9966_wReg_i2c(cam, 0x0c, cam->color) == -1 || |
| 804 | w9966_wReg_i2c(cam, 0x0d, cam->hue) == -1 |
| 805 | ) { |
| 806 | w9966_pdev_release(cam); |
| 807 | return -EIO; |
| 808 | } |
| 809 | |
| 810 | w9966_pdev_release(cam); |
| 811 | return 0; |
| 812 | } |
| 813 | case VIDIOCSWIN: |
| 814 | { |
| 815 | int ret; |
| 816 | struct video_window *vwin = arg; |
| 817 | |
| 818 | if (vwin->flags != 0) |
| 819 | return -EINVAL; |
| 820 | if (vwin->clipcount != 0) |
| 821 | return -EINVAL; |
| 822 | if (vwin->width < 2 || vwin->width > W9966_WND_MAX_W) |
| 823 | return -EINVAL; |
| 824 | if (vwin->height < 1 || vwin->height > W9966_WND_MAX_H) |
| 825 | return -EINVAL; |
| 826 | |
| 827 | // Update camera regs |
| 828 | w9966_pdev_claim(cam); |
| 829 | ret = w9966_setup(cam, 0, 0, 1023, 1023, vwin->width, vwin->height); |
| 830 | w9966_pdev_release(cam); |
| 831 | |
| 832 | if (ret != 0) { |
| 833 | DPRINTF("VIDIOCSWIN: w9966_setup() failed.\n"); |
| 834 | return -EIO; |
| 835 | } |
| 836 | |
| 837 | return 0; |
| 838 | } |
| 839 | case VIDIOCGWIN: |
| 840 | { |
| 841 | struct video_window *vwin = arg; |
| 842 | memset(vwin, 0, sizeof(*vwin)); |
| 843 | vwin->width = cam->width; |
| 844 | vwin->height = cam->height; |
| 845 | return 0; |
| 846 | } |
| 847 | // Unimplemented |
| 848 | case VIDIOCCAPTURE: |
| 849 | case VIDIOCGFBUF: |
| 850 | case VIDIOCSFBUF: |
| 851 | case VIDIOCKEY: |
| 852 | case VIDIOCGFREQ: |
| 853 | case VIDIOCSFREQ: |
| 854 | case VIDIOCGAUDIO: |
| 855 | case VIDIOCSAUDIO: |
| 856 | return -EINVAL; |
| 857 | default: |
| 858 | return -ENOIOCTLCMD; |
| 859 | } |
| 860 | return 0; |
| 861 | } |
| 862 | |
| 863 | static int w9966_v4l_ioctl(struct inode *inode, struct file *file, |
| 864 | unsigned int cmd, unsigned long arg) |
| 865 | { |
| 866 | return video_usercopy(inode, file, cmd, arg, w9966_v4l_do_ioctl); |
| 867 | } |
| 868 | |
| 869 | // Capture data |
| 870 | static ssize_t w9966_v4l_read(struct file *file, char __user *buf, |
| 871 | size_t count, loff_t *ppos) |
| 872 | { |
| 873 | struct video_device *vdev = video_devdata(file); |
| 874 | struct w9966_dev *cam = vdev->priv; |
| 875 | unsigned char addr = 0xa0; // ECP, read, CCD-transfer, 00000 |
| 876 | unsigned char __user *dest = (unsigned char __user *)buf; |
| 877 | unsigned long dleft = count; |
| 878 | unsigned char *tbuf; |
| 879 | |
| 880 | // Why would anyone want more than this?? |
| 881 | if (count > cam->width * cam->height * 2) |
| 882 | return -EINVAL; |
| 883 | |
| 884 | w9966_pdev_claim(cam); |
| 885 | w9966_wReg(cam, 0x00, 0x02); // Reset ECP-FIFO buffer |
| 886 | w9966_wReg(cam, 0x00, 0x00); // Return to normal operation |
| 887 | w9966_wReg(cam, 0x01, 0x98); // Enable capture |
| 888 | |
| 889 | // write special capture-addr and negotiate into data transfer |
| 890 | if ( |
| 891 | (parport_negotiate(cam->pport, cam->ppmode|IEEE1284_ADDR) != 0 )|| |
| 892 | (parport_write(cam->pport, &addr, 1) != 1 )|| |
| 893 | (parport_negotiate(cam->pport, cam->ppmode|IEEE1284_DATA) != 0 ) |
| 894 | ) { |
| 895 | w9966_pdev_release(cam); |
| 896 | return -EFAULT; |
| 897 | } |
| 898 | |
| 899 | tbuf = kmalloc(W9966_RBUFFER, GFP_KERNEL); |
| 900 | if (tbuf == NULL) { |
| 901 | count = -ENOMEM; |
| 902 | goto out; |
| 903 | } |
| 904 | |
| 905 | while(dleft > 0) |
| 906 | { |
| 907 | unsigned long tsize = (dleft > W9966_RBUFFER) ? W9966_RBUFFER : dleft; |
| 908 | |
| 909 | if (parport_read(cam->pport, tbuf, tsize) < tsize) { |
| 910 | count = -EFAULT; |
| 911 | goto out; |
| 912 | } |
| 913 | if (copy_to_user(dest, tbuf, tsize) != 0) { |
| 914 | count = -EFAULT; |
| 915 | goto out; |
| 916 | } |
| 917 | dest += tsize; |
| 918 | dleft -= tsize; |
| 919 | } |
| 920 | |
| 921 | w9966_wReg(cam, 0x01, 0x18); // Disable capture |
| 922 | |
| 923 | out: |
| 924 | kfree(tbuf); |
| 925 | w9966_pdev_release(cam); |
| 926 | |
| 927 | return count; |
| 928 | } |
| 929 | |
| 930 | |
| 931 | // Called once for every parport on init |
| 932 | static void w9966_attach(struct parport *port) |
| 933 | { |
| 934 | int i; |
| 935 | |
| 936 | for (i = 0; i < W9966_MAXCAMS; i++) |
| 937 | { |
| 938 | if (w9966_cams[i].dev_state != 0) // Cam is already assigned |
| 939 | continue; |
| 940 | if ( |
| 941 | strcmp(pardev[i], "aggressive") == 0 || |
| 942 | strcmp(pardev[i], port->name) == 0 |
| 943 | ) { |
| 944 | if (w9966_init(&w9966_cams[i], port) != 0) |
| 945 | w9966_term(&w9966_cams[i]); |
| 946 | break; // return |
| 947 | } |
| 948 | } |
| 949 | } |
| 950 | |
| 951 | // Called once for every parport on termination |
| 952 | static void w9966_detach(struct parport *port) |
| 953 | { |
| 954 | int i; |
| 955 | for (i = 0; i < W9966_MAXCAMS; i++) |
| 956 | if (w9966_cams[i].dev_state != 0 && w9966_cams[i].pport == port) |
| 957 | w9966_term(&w9966_cams[i]); |
| 958 | } |
| 959 | |
| 960 | |
| 961 | static struct parport_driver w9966_ppd = { |
| 962 | .name = W9966_DRIVERNAME, |
| 963 | .attach = w9966_attach, |
| 964 | .detach = w9966_detach, |
| 965 | }; |
| 966 | |
| 967 | // Module entry point |
| 968 | static int __init w9966_mod_init(void) |
| 969 | { |
| 970 | int i; |
| 971 | for (i = 0; i < W9966_MAXCAMS; i++) |
| 972 | w9966_cams[i].dev_state = 0; |
| 973 | |
| 974 | return parport_register_driver(&w9966_ppd); |
| 975 | } |
| 976 | |
| 977 | // Module cleanup |
| 978 | static void __exit w9966_mod_term(void) |
| 979 | { |
| 980 | parport_unregister_driver(&w9966_ppd); |
| 981 | } |
| 982 | |
| 983 | module_init(w9966_mod_init); |
| 984 | module_exit(w9966_mod_term); |