Commit | Line | Data |
---|---|---|
1da177e4 LT |
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: | |
d56410e0 | 29 | |
1da177e4 LT |
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! | |
d56410e0 | 50 | |
1da177e4 | 51 | Changes: |
d56410e0 | 52 | |
1da177e4 LT |
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> | |
7e0a16f6 | 60 | #include <linux/videodev.h> |
5a0e3ad6 | 61 | #include <linux/slab.h> |
5e87efa3 | 62 | #include <media/v4l2-common.h> |
35ea11ff | 63 | #include <media/v4l2-ioctl.h> |
1da177e4 LT |
64 | #include <linux/parport.h> |
65 | ||
ff699e6b | 66 | /*#define DEBUG*/ /* Undef me for production */ |
1da177e4 LT |
67 | |
68 | #ifdef DEBUG | |
7e28adb2 | 69 | #define DPRINTF(x, a...) printk(KERN_DEBUG "W9966: %s(): "x, __func__ , ##a) |
1da177e4 LT |
70 | #else |
71 | #define DPRINTF(x...) | |
72 | #endif | |
73 | ||
74 | /* | |
75 | * Defines, simple typedefs etc. | |
76 | */ | |
77 | ||
78 | #define W9966_DRIVERNAME "W9966CF Webcam" | |
4bfdd586 HV |
79 | #define W9966_MAXCAMS 4 /* Maximum number of cameras */ |
80 | #define W9966_RBUFFER 2048 /* Read buffer (must be an even number) */ | |
81 | #define W9966_SRAMSIZE 131072 /* 128kb */ | |
82 | #define W9966_SRAMID 0x02 /* check w9966cf.pdf */ | |
1da177e4 | 83 | |
4bfdd586 | 84 | /* Empirically determined window limits */ |
1da177e4 LT |
85 | #define W9966_WND_MIN_X 16 |
86 | #define W9966_WND_MIN_Y 14 | |
87 | #define W9966_WND_MAX_X 705 | |
88 | #define W9966_WND_MAX_Y 253 | |
89 | #define W9966_WND_MAX_W (W9966_WND_MAX_X - W9966_WND_MIN_X) | |
90 | #define W9966_WND_MAX_H (W9966_WND_MAX_Y - W9966_WND_MIN_Y) | |
91 | ||
4bfdd586 | 92 | /* Keep track of our current state */ |
1da177e4 LT |
93 | #define W9966_STATE_PDEV 0x01 |
94 | #define W9966_STATE_CLAIMED 0x02 | |
95 | #define W9966_STATE_VDEV 0x04 | |
96 | ||
97 | #define W9966_I2C_W_ID 0x48 | |
98 | #define W9966_I2C_R_ID 0x49 | |
99 | #define W9966_I2C_R_DATA 0x08 | |
100 | #define W9966_I2C_R_CLOCK 0x04 | |
101 | #define W9966_I2C_W_DATA 0x02 | |
102 | #define W9966_I2C_W_CLOCK 0x01 | |
103 | ||
104 | struct w9966_dev { | |
105 | unsigned char dev_state; | |
106 | unsigned char i2c_state; | |
107 | unsigned short ppmode; | |
4bfdd586 HV |
108 | struct parport *pport; |
109 | struct pardevice *pdev; | |
1da177e4 LT |
110 | struct video_device vdev; |
111 | unsigned short width; | |
112 | unsigned short height; | |
113 | unsigned char brightness; | |
114 | signed char contrast; | |
115 | signed char color; | |
116 | signed char hue; | |
7d43cd53 | 117 | unsigned long in_use; |
1da177e4 LT |
118 | }; |
119 | ||
120 | /* | |
121 | * Module specific properties | |
122 | */ | |
123 | ||
124 | MODULE_AUTHOR("Jakob Kemi <jakob.kemi@post.utfors.se>"); | |
125 | MODULE_DESCRIPTION("Winbond w9966cf WebCam driver (0.32)"); | |
126 | MODULE_LICENSE("GPL"); | |
127 | ||
128 | ||
129 | #ifdef MODULE | |
4bfdd586 | 130 | static const char *pardev[] = {[0 ... W9966_MAXCAMS] = ""}; |
1da177e4 | 131 | #else |
4bfdd586 | 132 | static const char *pardev[] = {[0 ... W9966_MAXCAMS] = "aggressive"}; |
1da177e4 LT |
133 | #endif |
134 | module_param_array(pardev, charp, NULL, 0); | |
4bfdd586 HV |
135 | MODULE_PARM_DESC(pardev, "pardev: where to search for\n" |
136 | "\teach camera. 'aggressive' means brute-force search.\n" | |
137 | "\tEg: >pardev=parport3,aggressive,parport2,parport1< would assign\n" | |
138 | "\tcam 1 to parport3 and search every parport for cam 2 etc..."); | |
1da177e4 | 139 | |
ff699e6b | 140 | static int parmode; |
1da177e4 LT |
141 | module_param(parmode, int, 0); |
142 | MODULE_PARM_DESC(parmode, "parmode: transfer mode (0=auto, 1=ecp, 2=epp"); | |
143 | ||
144 | static int video_nr = -1; | |
145 | module_param(video_nr, int, 0); | |
146 | ||
1da177e4 LT |
147 | static struct w9966_dev w9966_cams[W9966_MAXCAMS]; |
148 | ||
1da177e4 LT |
149 | /* |
150 | * Private function defines | |
151 | */ | |
152 | ||
153 | ||
4bfdd586 HV |
154 | /* Set camera phase flags, so we know what to uninit when terminating */ |
155 | static inline void w9966_setState(struct w9966_dev *cam, int mask, int val) | |
1da177e4 LT |
156 | { |
157 | cam->dev_state = (cam->dev_state & ~mask) ^ val; | |
158 | } | |
159 | ||
4bfdd586 HV |
160 | /* Get camera phase flags */ |
161 | static inline int w9966_getState(struct w9966_dev *cam, int mask, int val) | |
1da177e4 LT |
162 | { |
163 | return ((cam->dev_state & mask) == val); | |
164 | } | |
165 | ||
4bfdd586 | 166 | /* Claim parport for ourself */ |
271922c0 | 167 | static void w9966_pdev_claim(struct w9966_dev *cam) |
1da177e4 LT |
168 | { |
169 | if (w9966_getState(cam, W9966_STATE_CLAIMED, W9966_STATE_CLAIMED)) | |
170 | return; | |
171 | parport_claim_or_block(cam->pdev); | |
172 | w9966_setState(cam, W9966_STATE_CLAIMED, W9966_STATE_CLAIMED); | |
173 | } | |
174 | ||
4bfdd586 | 175 | /* Release parport for others to use */ |
271922c0 | 176 | static void w9966_pdev_release(struct w9966_dev *cam) |
1da177e4 LT |
177 | { |
178 | if (w9966_getState(cam, W9966_STATE_CLAIMED, 0)) | |
179 | return; | |
180 | parport_release(cam->pdev); | |
181 | w9966_setState(cam, W9966_STATE_CLAIMED, 0); | |
182 | } | |
d56410e0 | 183 | |
4bfdd586 HV |
184 | /* Read register from W9966 interface-chip |
185 | Expects a claimed pdev | |
186 | -1 on error, else register data (byte) */ | |
187 | static int w9966_rReg(struct w9966_dev *cam, int reg) | |
1da177e4 | 188 | { |
4bfdd586 | 189 | /* ECP, read, regtransfer, REG, REG, REG, REG, REG */ |
1da177e4 LT |
190 | const unsigned char addr = 0x80 | (reg & 0x1f); |
191 | unsigned char val; | |
d56410e0 | 192 | |
1da177e4 LT |
193 | if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_ADDR) != 0) |
194 | return -1; | |
195 | if (parport_write(cam->pport, &addr, 1) != 1) | |
196 | return -1; | |
197 | if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_DATA) != 0) | |
198 | return -1; | |
199 | if (parport_read(cam->pport, &val, 1) != 1) | |
200 | return -1; | |
201 | ||
202 | return val; | |
203 | } | |
204 | ||
4bfdd586 HV |
205 | /* Write register to W9966 interface-chip |
206 | Expects a claimed pdev | |
207 | -1 on error */ | |
208 | static int w9966_wReg(struct w9966_dev *cam, int reg, int data) | |
1da177e4 | 209 | { |
4bfdd586 | 210 | /* ECP, write, regtransfer, REG, REG, REG, REG, REG */ |
1da177e4 LT |
211 | const unsigned char addr = 0xc0 | (reg & 0x1f); |
212 | const unsigned char val = data; | |
d56410e0 | 213 | |
1da177e4 LT |
214 | if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_ADDR) != 0) |
215 | return -1; | |
216 | if (parport_write(cam->pport, &addr, 1) != 1) | |
217 | return -1; | |
218 | if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_DATA) != 0) | |
219 | return -1; | |
220 | if (parport_write(cam->pport, &val, 1) != 1) | |
221 | return -1; | |
222 | ||
223 | return 0; | |
224 | } | |
225 | ||
271922c0 HV |
226 | /* |
227 | * Ugly and primitive i2c protocol functions | |
228 | */ | |
229 | ||
230 | /* Sets the data line on the i2c bus. | |
231 | Expects a claimed pdev. */ | |
232 | static void w9966_i2c_setsda(struct w9966_dev *cam, int state) | |
1da177e4 | 233 | { |
271922c0 HV |
234 | if (state) |
235 | cam->i2c_state |= W9966_I2C_W_DATA; | |
236 | else | |
237 | cam->i2c_state &= ~W9966_I2C_W_DATA; | |
d56410e0 | 238 | |
271922c0 HV |
239 | w9966_wReg(cam, 0x18, cam->i2c_state); |
240 | udelay(5); | |
241 | } | |
1da177e4 | 242 | |
271922c0 HV |
243 | /* Get peripheral clock line |
244 | Expects a claimed pdev. */ | |
245 | static int w9966_i2c_getscl(struct w9966_dev *cam) | |
246 | { | |
247 | const unsigned char state = w9966_rReg(cam, 0x18); | |
248 | return ((state & W9966_I2C_R_CLOCK) > 0); | |
249 | } | |
250 | ||
251 | /* Sets the clock line on the i2c bus. | |
252 | Expects a claimed pdev. -1 on error */ | |
253 | static int w9966_i2c_setscl(struct w9966_dev *cam, int state) | |
254 | { | |
255 | unsigned long timeout; | |
256 | ||
257 | if (state) | |
258 | cam->i2c_state |= W9966_I2C_W_CLOCK; | |
259 | else | |
260 | cam->i2c_state &= ~W9966_I2C_W_CLOCK; | |
261 | ||
262 | w9966_wReg(cam, 0x18, cam->i2c_state); | |
263 | udelay(5); | |
264 | ||
265 | /* we go to high, we also expect the peripheral to ack. */ | |
266 | if (state) { | |
267 | timeout = jiffies + 100; | |
268 | while (!w9966_i2c_getscl(cam)) { | |
269 | if (time_after(jiffies, timeout)) | |
270 | return -1; | |
271 | } | |
1da177e4 | 272 | } |
271922c0 HV |
273 | return 0; |
274 | } | |
d56410e0 | 275 | |
271922c0 HV |
276 | #if 0 |
277 | /* Get peripheral data line | |
278 | Expects a claimed pdev. */ | |
279 | static int w9966_i2c_getsda(struct w9966_dev *cam) | |
280 | { | |
281 | const unsigned char state = w9966_rReg(cam, 0x18); | |
282 | return ((state & W9966_I2C_R_DATA) > 0); | |
283 | } | |
284 | #endif | |
285 | ||
286 | /* Write a byte with ack to the i2c bus. | |
287 | Expects a claimed pdev. -1 on error */ | |
288 | static int w9966_i2c_wbyte(struct w9966_dev *cam, int data) | |
289 | { | |
290 | int i; | |
291 | ||
292 | for (i = 7; i >= 0; i--) { | |
293 | w9966_i2c_setsda(cam, (data >> i) & 0x01); | |
294 | ||
295 | if (w9966_i2c_setscl(cam, 1) == -1) | |
296 | return -1; | |
297 | w9966_i2c_setscl(cam, 0); | |
1da177e4 | 298 | } |
1da177e4 | 299 | |
271922c0 | 300 | w9966_i2c_setsda(cam, 1); |
d56410e0 | 301 | |
271922c0 | 302 | if (w9966_i2c_setscl(cam, 1) == -1) |
1da177e4 | 303 | return -1; |
271922c0 HV |
304 | w9966_i2c_setscl(cam, 0); |
305 | ||
306 | return 0; | |
307 | } | |
308 | ||
309 | /* Read a data byte with ack from the i2c-bus | |
310 | Expects a claimed pdev. -1 on error */ | |
311 | #if 0 | |
312 | static int w9966_i2c_rbyte(struct w9966_dev *cam) | |
313 | { | |
314 | unsigned char data = 0x00; | |
315 | int i; | |
316 | ||
317 | w9966_i2c_setsda(cam, 1); | |
318 | ||
319 | for (i = 0; i < 8; i++) { | |
320 | if (w9966_i2c_setscl(cam, 1) == -1) | |
321 | return -1; | |
322 | data = data << 1; | |
323 | if (w9966_i2c_getsda(cam)) | |
324 | data |= 0x01; | |
325 | ||
326 | w9966_i2c_setscl(cam, 0); | |
1da177e4 | 327 | } |
271922c0 HV |
328 | return data; |
329 | } | |
330 | #endif | |
1da177e4 | 331 | |
271922c0 HV |
332 | /* Read a register from the i2c device. |
333 | Expects claimed pdev. -1 on error */ | |
334 | #if 0 | |
335 | static int w9966_rReg_i2c(struct w9966_dev *cam, int reg) | |
336 | { | |
337 | int data; | |
1da177e4 | 338 | |
271922c0 HV |
339 | w9966_i2c_setsda(cam, 0); |
340 | w9966_i2c_setscl(cam, 0); | |
1da177e4 | 341 | |
271922c0 HV |
342 | if (w9966_i2c_wbyte(cam, W9966_I2C_W_ID) == -1 || |
343 | w9966_i2c_wbyte(cam, reg) == -1) | |
1da177e4 | 344 | return -1; |
d56410e0 | 345 | |
271922c0 HV |
346 | w9966_i2c_setsda(cam, 1); |
347 | if (w9966_i2c_setscl(cam, 1) == -1) | |
348 | return -1; | |
349 | w9966_i2c_setsda(cam, 0); | |
350 | w9966_i2c_setscl(cam, 0); | |
d56410e0 | 351 | |
271922c0 HV |
352 | if (w9966_i2c_wbyte(cam, W9966_I2C_R_ID) == -1) |
353 | return -1; | |
354 | data = w9966_i2c_rbyte(cam); | |
355 | if (data == -1) | |
356 | return -1; | |
1da177e4 | 357 | |
271922c0 | 358 | w9966_i2c_setsda(cam, 0); |
1da177e4 | 359 | |
271922c0 HV |
360 | if (w9966_i2c_setscl(cam, 1) == -1) |
361 | return -1; | |
362 | w9966_i2c_setsda(cam, 1); | |
363 | ||
364 | return data; | |
365 | } | |
366 | #endif | |
367 | ||
368 | /* Write a register to the i2c device. | |
369 | Expects claimed pdev. -1 on error */ | |
370 | static int w9966_wReg_i2c(struct w9966_dev *cam, int reg, int data) | |
1da177e4 | 371 | { |
271922c0 HV |
372 | w9966_i2c_setsda(cam, 0); |
373 | w9966_i2c_setscl(cam, 0); | |
1da177e4 | 374 | |
271922c0 HV |
375 | if (w9966_i2c_wbyte(cam, W9966_I2C_W_ID) == -1 || |
376 | w9966_i2c_wbyte(cam, reg) == -1 || | |
377 | w9966_i2c_wbyte(cam, data) == -1) | |
378 | return -1; | |
1da177e4 | 379 | |
271922c0 HV |
380 | w9966_i2c_setsda(cam, 0); |
381 | if (w9966_i2c_setscl(cam, 1) == -1) | |
382 | return -1; | |
383 | ||
384 | w9966_i2c_setsda(cam, 1); | |
1da177e4 | 385 | |
271922c0 HV |
386 | return 0; |
387 | } | |
1da177e4 | 388 | |
4bfdd586 HV |
389 | /* Find a good length for capture window (used both for W and H) |
390 | A bit ugly but pretty functional. The capture length | |
391 | have to match the downscale */ | |
1da177e4 LT |
392 | static int w9966_findlen(int near, int size, int maxlen) |
393 | { | |
394 | int bestlen = size; | |
395 | int besterr = abs(near - bestlen); | |
396 | int len; | |
397 | ||
4bfdd586 | 398 | for (len = size + 1; len < maxlen; len++) { |
1da177e4 | 399 | int err; |
4bfdd586 | 400 | if (((64 * size) % len) != 0) |
1da177e4 LT |
401 | continue; |
402 | ||
403 | err = abs(near - len); | |
404 | ||
4bfdd586 | 405 | /* Only continue as long as we keep getting better values */ |
1da177e4 LT |
406 | if (err > besterr) |
407 | break; | |
d56410e0 | 408 | |
1da177e4 LT |
409 | besterr = err; |
410 | bestlen = len; | |
411 | } | |
412 | ||
413 | return bestlen; | |
414 | } | |
415 | ||
4bfdd586 HV |
416 | /* Modify capture window (if necessary) |
417 | and calculate downscaling | |
418 | Return -1 on error */ | |
419 | static int w9966_calcscale(int size, int min, int max, int *beg, int *end, unsigned char *factor) | |
1da177e4 LT |
420 | { |
421 | int maxlen = max - min; | |
422 | int len = *end - *beg + 1; | |
423 | int newlen = w9966_findlen(len, size, maxlen); | |
d56410e0 | 424 | int err = newlen - len; |
1da177e4 | 425 | |
4bfdd586 | 426 | /* Check for bad format */ |
1da177e4 LT |
427 | if (newlen > maxlen || newlen < size) |
428 | return -1; | |
429 | ||
4bfdd586 HV |
430 | /* Set factor (6 bit fixed) */ |
431 | *factor = (64 * size) / newlen; | |
1da177e4 | 432 | if (*factor == 64) |
4bfdd586 | 433 | *factor = 0x00; /* downscale is disabled */ |
1da177e4 | 434 | else |
4bfdd586 | 435 | *factor |= 0x80; /* set downscale-enable bit */ |
1da177e4 | 436 | |
4bfdd586 | 437 | /* Modify old beginning and end */ |
1da177e4 LT |
438 | *beg -= err / 2; |
439 | *end += err - (err / 2); | |
440 | ||
4bfdd586 | 441 | /* Move window if outside borders */ |
1da177e4 LT |
442 | if (*beg < min) { |
443 | *end += min - *beg; | |
444 | *beg += min - *beg; | |
445 | } | |
446 | if (*end > max) { | |
447 | *beg -= *end - max; | |
448 | *end -= *end - max; | |
449 | } | |
450 | ||
451 | return 0; | |
452 | } | |
453 | ||
4bfdd586 HV |
454 | /* Setup the cameras capture window etc. |
455 | Expects a claimed pdev | |
456 | return -1 on error */ | |
457 | static int w9966_setup(struct w9966_dev *cam, int x1, int y1, int x2, int y2, int w, int h) | |
1da177e4 LT |
458 | { |
459 | unsigned int i; | |
460 | unsigned int enh_s, enh_e; | |
461 | unsigned char scale_x, scale_y; | |
462 | unsigned char regs[0x1c]; | |
463 | unsigned char saa7111_regs[] = { | |
464 | 0x21, 0x00, 0xd8, 0x23, 0x00, 0x80, 0x80, 0x00, | |
465 | 0x88, 0x10, 0x80, 0x40, 0x40, 0x00, 0x01, 0x00, | |
466 | 0x48, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
467 | 0x00, 0x00, 0x00, 0x71, 0xe7, 0x00, 0x00, 0xc0 | |
468 | }; | |
d56410e0 MCC |
469 | |
470 | ||
4bfdd586 | 471 | if (w * h * 2 > W9966_SRAMSIZE) { |
1da177e4 | 472 | DPRINTF("capture window exceeds SRAM size!.\n"); |
4bfdd586 | 473 | w = 200; h = 160; /* Pick default values */ |
1da177e4 LT |
474 | } |
475 | ||
476 | w &= ~0x1; | |
4bfdd586 HV |
477 | if (w < 2) |
478 | w = 2; | |
479 | if (h < 1) | |
480 | h = 1; | |
481 | if (w > W9966_WND_MAX_W) | |
482 | w = W9966_WND_MAX_W; | |
483 | if (h > W9966_WND_MAX_H) | |
484 | h = W9966_WND_MAX_H; | |
1da177e4 LT |
485 | |
486 | cam->width = w; | |
487 | cam->height = h; | |
488 | ||
d56410e0 | 489 | enh_s = 0; |
4bfdd586 HV |
490 | enh_e = w * h * 2; |
491 | ||
492 | /* Modify capture window if necessary and calculate downscaling */ | |
493 | if (w9966_calcscale(w, W9966_WND_MIN_X, W9966_WND_MAX_X, &x1, &x2, &scale_x) != 0 || | |
494 | w9966_calcscale(h, W9966_WND_MIN_Y, W9966_WND_MAX_Y, &y1, &y2, &scale_y) != 0) | |
495 | return -1; | |
496 | ||
497 | DPRINTF("%dx%d, x: %d<->%d, y: %d<->%d, sx: %d/64, sy: %d/64.\n", | |
498 | w, h, x1, x2, y1, y2, scale_x & ~0x80, scale_y & ~0x80); | |
499 | ||
500 | /* Setup registers */ | |
501 | regs[0x00] = 0x00; /* Set normal operation */ | |
502 | regs[0x01] = 0x18; /* Capture mode */ | |
503 | regs[0x02] = scale_y; /* V-scaling */ | |
504 | regs[0x03] = scale_x; /* H-scaling */ | |
505 | ||
506 | /* Capture window */ | |
507 | regs[0x04] = (x1 & 0x0ff); /* X-start (8 low bits) */ | |
508 | regs[0x05] = (x1 & 0x300)>>8; /* X-start (2 high bits) */ | |
509 | regs[0x06] = (y1 & 0x0ff); /* Y-start (8 low bits) */ | |
510 | regs[0x07] = (y1 & 0x300)>>8; /* Y-start (2 high bits) */ | |
511 | regs[0x08] = (x2 & 0x0ff); /* X-end (8 low bits) */ | |
512 | regs[0x09] = (x2 & 0x300)>>8; /* X-end (2 high bits) */ | |
513 | regs[0x0a] = (y2 & 0x0ff); /* Y-end (8 low bits) */ | |
514 | ||
515 | regs[0x0c] = W9966_SRAMID; /* SRAM-banks (1x 128kb) */ | |
516 | ||
517 | /* Enhancement layer */ | |
518 | regs[0x0d] = (enh_s & 0x000ff); /* Enh. start (0-7) */ | |
519 | regs[0x0e] = (enh_s & 0x0ff00) >> 8; /* Enh. start (8-15) */ | |
520 | regs[0x0f] = (enh_s & 0x70000) >> 16; /* Enh. start (16-17/18??) */ | |
521 | regs[0x10] = (enh_e & 0x000ff); /* Enh. end (0-7) */ | |
522 | regs[0x11] = (enh_e & 0x0ff00) >> 8; /* Enh. end (8-15) */ | |
523 | regs[0x12] = (enh_e & 0x70000) >> 16; /* Enh. end (16-17/18??) */ | |
524 | ||
525 | /* Misc */ | |
526 | regs[0x13] = 0x40; /* VEE control (raw 4:2:2) */ | |
527 | regs[0x17] = 0x00; /* ??? */ | |
528 | regs[0x18] = cam->i2c_state = 0x00; /* Serial bus */ | |
529 | regs[0x19] = 0xff; /* I/O port direction control */ | |
530 | regs[0x1a] = 0xff; /* I/O port data register */ | |
531 | regs[0x1b] = 0x10; /* ??? */ | |
532 | ||
533 | /* SAA7111 chip settings */ | |
1da177e4 LT |
534 | saa7111_regs[0x0a] = cam->brightness; |
535 | saa7111_regs[0x0b] = cam->contrast; | |
536 | saa7111_regs[0x0c] = cam->color; | |
537 | saa7111_regs[0x0d] = cam->hue; | |
538 | ||
4bfdd586 | 539 | /* Reset (ECP-fifo & serial-bus) */ |
1da177e4 LT |
540 | if (w9966_wReg(cam, 0x00, 0x03) == -1) |
541 | return -1; | |
542 | ||
4bfdd586 | 543 | /* Write regs to w9966cf chip */ |
1da177e4 LT |
544 | for (i = 0; i < 0x1c; i++) |
545 | if (w9966_wReg(cam, i, regs[i]) == -1) | |
546 | return -1; | |
547 | ||
4bfdd586 | 548 | /* Write regs to saa7111 chip */ |
1da177e4 LT |
549 | for (i = 0; i < 0x20; i++) |
550 | if (w9966_wReg_i2c(cam, i, saa7111_regs[i]) == -1) | |
551 | return -1; | |
552 | ||
553 | return 0; | |
554 | } | |
555 | ||
556 | /* | |
271922c0 | 557 | * Video4linux interfacing |
1da177e4 LT |
558 | */ |
559 | ||
271922c0 | 560 | static long w9966_v4l_do_ioctl(struct file *file, unsigned int cmd, void *arg) |
1da177e4 | 561 | { |
c170ecf4 | 562 | struct w9966_dev *cam = video_drvdata(file); |
d56410e0 | 563 | |
4bfdd586 | 564 | switch (cmd) { |
1da177e4 LT |
565 | case VIDIOCGCAP: |
566 | { | |
567 | static struct video_capability vcap = { | |
568 | .name = W9966_DRIVERNAME, | |
569 | .type = VID_TYPE_CAPTURE | VID_TYPE_SCALES, | |
570 | .channels = 1, | |
571 | .maxwidth = W9966_WND_MAX_W, | |
572 | .maxheight = W9966_WND_MAX_H, | |
573 | .minwidth = 2, | |
574 | .minheight = 1, | |
575 | }; | |
576 | struct video_capability *cap = arg; | |
577 | *cap = vcap; | |
578 | return 0; | |
579 | } | |
580 | case VIDIOCGCHAN: | |
581 | { | |
582 | struct video_channel *vch = arg; | |
4bfdd586 | 583 | if (vch->channel != 0) /* We only support one channel (#0) */ |
1da177e4 | 584 | return -EINVAL; |
4bfdd586 | 585 | memset(vch, 0, sizeof(*vch)); |
1da177e4 LT |
586 | strcpy(vch->name, "CCD-input"); |
587 | vch->type = VIDEO_TYPE_CAMERA; | |
588 | return 0; | |
589 | } | |
590 | case VIDIOCSCHAN: | |
591 | { | |
592 | struct video_channel *vch = arg; | |
4bfdd586 | 593 | if (vch->channel != 0) |
1da177e4 LT |
594 | return -EINVAL; |
595 | return 0; | |
596 | } | |
597 | case VIDIOCGTUNER: | |
598 | { | |
599 | struct video_tuner *vtune = arg; | |
4bfdd586 | 600 | if (vtune->tuner != 0) |
1da177e4 LT |
601 | return -EINVAL; |
602 | strcpy(vtune->name, "no tuner"); | |
603 | vtune->rangelow = 0; | |
604 | vtune->rangehigh = 0; | |
605 | vtune->flags = VIDEO_TUNER_NORM; | |
606 | vtune->mode = VIDEO_MODE_AUTO; | |
607 | vtune->signal = 0xffff; | |
608 | return 0; | |
609 | } | |
610 | case VIDIOCSTUNER: | |
611 | { | |
612 | struct video_tuner *vtune = arg; | |
613 | if (vtune->tuner != 0) | |
614 | return -EINVAL; | |
615 | if (vtune->mode != VIDEO_MODE_AUTO) | |
616 | return -EINVAL; | |
617 | return 0; | |
618 | } | |
619 | case VIDIOCGPICT: | |
620 | { | |
621 | struct video_picture vpic = { | |
4bfdd586 HV |
622 | cam->brightness << 8, /* brightness */ |
623 | (cam->hue + 128) << 8, /* hue */ | |
624 | cam->color << 9, /* color */ | |
625 | cam->contrast << 9, /* contrast */ | |
626 | 0x8000, /* whiteness */ | |
627 | 16, VIDEO_PALETTE_YUV422/* bpp, palette format */ | |
1da177e4 LT |
628 | }; |
629 | struct video_picture *pic = arg; | |
630 | *pic = vpic; | |
631 | return 0; | |
632 | } | |
633 | case VIDIOCSPICT: | |
634 | { | |
635 | struct video_picture *vpic = arg; | |
2485eb0a | 636 | if (vpic->depth != 16 || (vpic->palette != VIDEO_PALETTE_YUV422 && vpic->palette != VIDEO_PALETTE_YUYV)) |
1da177e4 | 637 | return -EINVAL; |
d56410e0 | 638 | |
1da177e4 LT |
639 | cam->brightness = vpic->brightness >> 8; |
640 | cam->hue = (vpic->hue >> 8) - 128; | |
641 | cam->color = vpic->colour >> 9; | |
642 | cam->contrast = vpic->contrast >> 9; | |
643 | ||
644 | w9966_pdev_claim(cam); | |
d56410e0 | 645 | |
1da177e4 LT |
646 | if ( |
647 | w9966_wReg_i2c(cam, 0x0a, cam->brightness) == -1 || | |
648 | w9966_wReg_i2c(cam, 0x0b, cam->contrast) == -1 || | |
649 | w9966_wReg_i2c(cam, 0x0c, cam->color) == -1 || | |
650 | w9966_wReg_i2c(cam, 0x0d, cam->hue) == -1 | |
651 | ) { | |
652 | w9966_pdev_release(cam); | |
653 | return -EIO; | |
654 | } | |
d56410e0 | 655 | |
1da177e4 LT |
656 | w9966_pdev_release(cam); |
657 | return 0; | |
658 | } | |
659 | case VIDIOCSWIN: | |
660 | { | |
661 | int ret; | |
662 | struct video_window *vwin = arg; | |
d56410e0 | 663 | |
1da177e4 LT |
664 | if (vwin->flags != 0) |
665 | return -EINVAL; | |
666 | if (vwin->clipcount != 0) | |
667 | return -EINVAL; | |
668 | if (vwin->width < 2 || vwin->width > W9966_WND_MAX_W) | |
d56410e0 | 669 | return -EINVAL; |
1da177e4 LT |
670 | if (vwin->height < 1 || vwin->height > W9966_WND_MAX_H) |
671 | return -EINVAL; | |
672 | ||
4bfdd586 | 673 | /* Update camera regs */ |
1da177e4 LT |
674 | w9966_pdev_claim(cam); |
675 | ret = w9966_setup(cam, 0, 0, 1023, 1023, vwin->width, vwin->height); | |
676 | w9966_pdev_release(cam); | |
d56410e0 | 677 | |
1da177e4 LT |
678 | if (ret != 0) { |
679 | DPRINTF("VIDIOCSWIN: w9966_setup() failed.\n"); | |
680 | return -EIO; | |
681 | } | |
d56410e0 | 682 | |
1da177e4 LT |
683 | return 0; |
684 | } | |
685 | case VIDIOCGWIN: | |
686 | { | |
687 | struct video_window *vwin = arg; | |
688 | memset(vwin, 0, sizeof(*vwin)); | |
689 | vwin->width = cam->width; | |
690 | vwin->height = cam->height; | |
691 | return 0; | |
692 | } | |
4bfdd586 | 693 | /* Unimplemented */ |
d56410e0 | 694 | case VIDIOCCAPTURE: |
1da177e4 LT |
695 | case VIDIOCGFBUF: |
696 | case VIDIOCSFBUF: | |
697 | case VIDIOCKEY: | |
698 | case VIDIOCGFREQ: | |
699 | case VIDIOCSFREQ: | |
700 | case VIDIOCGAUDIO: | |
701 | case VIDIOCSAUDIO: | |
702 | return -EINVAL; | |
703 | default: | |
704 | return -ENOIOCTLCMD; | |
705 | } | |
706 | return 0; | |
707 | } | |
708 | ||
069b7479 | 709 | static long w9966_v4l_ioctl(struct file *file, |
1da177e4 LT |
710 | unsigned int cmd, unsigned long arg) |
711 | { | |
f473bf76 | 712 | return video_usercopy(file, cmd, arg, w9966_v4l_do_ioctl); |
1da177e4 LT |
713 | } |
714 | ||
4bfdd586 | 715 | /* Capture data */ |
1da177e4 LT |
716 | static ssize_t w9966_v4l_read(struct file *file, char __user *buf, |
717 | size_t count, loff_t *ppos) | |
718 | { | |
c170ecf4 | 719 | struct w9966_dev *cam = video_drvdata(file); |
4bfdd586 | 720 | unsigned char addr = 0xa0; /* ECP, read, CCD-transfer, 00000 */ |
1da177e4 LT |
721 | unsigned char __user *dest = (unsigned char __user *)buf; |
722 | unsigned long dleft = count; | |
723 | unsigned char *tbuf; | |
d56410e0 | 724 | |
4bfdd586 | 725 | /* Why would anyone want more than this?? */ |
1da177e4 LT |
726 | if (count > cam->width * cam->height * 2) |
727 | return -EINVAL; | |
d56410e0 | 728 | |
1da177e4 | 729 | w9966_pdev_claim(cam); |
4bfdd586 HV |
730 | w9966_wReg(cam, 0x00, 0x02); /* Reset ECP-FIFO buffer */ |
731 | w9966_wReg(cam, 0x00, 0x00); /* Return to normal operation */ | |
732 | w9966_wReg(cam, 0x01, 0x98); /* Enable capture */ | |
733 | ||
734 | /* write special capture-addr and negotiate into data transfer */ | |
735 | if ((parport_negotiate(cam->pport, cam->ppmode|IEEE1284_ADDR) != 0) || | |
736 | (parport_write(cam->pport, &addr, 1) != 1) || | |
737 | (parport_negotiate(cam->pport, cam->ppmode|IEEE1284_DATA) != 0)) { | |
1da177e4 LT |
738 | w9966_pdev_release(cam); |
739 | return -EFAULT; | |
740 | } | |
741 | ||
742 | tbuf = kmalloc(W9966_RBUFFER, GFP_KERNEL); | |
743 | if (tbuf == NULL) { | |
744 | count = -ENOMEM; | |
745 | goto out; | |
746 | } | |
747 | ||
4bfdd586 | 748 | while (dleft > 0) { |
1da177e4 | 749 | unsigned long tsize = (dleft > W9966_RBUFFER) ? W9966_RBUFFER : dleft; |
d56410e0 | 750 | |
1da177e4 LT |
751 | if (parport_read(cam->pport, tbuf, tsize) < tsize) { |
752 | count = -EFAULT; | |
753 | goto out; | |
754 | } | |
755 | if (copy_to_user(dest, tbuf, tsize) != 0) { | |
756 | count = -EFAULT; | |
757 | goto out; | |
758 | } | |
759 | dest += tsize; | |
760 | dleft -= tsize; | |
761 | } | |
762 | ||
4bfdd586 | 763 | w9966_wReg(cam, 0x01, 0x18); /* Disable capture */ |
1da177e4 LT |
764 | |
765 | out: | |
766 | kfree(tbuf); | |
767 | w9966_pdev_release(cam); | |
768 | ||
769 | return count; | |
770 | } | |
771 | ||
271922c0 HV |
772 | static int w9966_exclusive_open(struct file *file) |
773 | { | |
774 | struct w9966_dev *cam = video_drvdata(file); | |
775 | ||
776 | return test_and_set_bit(0, &cam->in_use) ? -EBUSY : 0; | |
777 | } | |
778 | ||
779 | static int w9966_exclusive_release(struct file *file) | |
780 | { | |
781 | struct w9966_dev *cam = video_drvdata(file); | |
782 | ||
783 | clear_bit(0, &cam->in_use); | |
784 | return 0; | |
785 | } | |
786 | ||
787 | static const struct v4l2_file_operations w9966_fops = { | |
788 | .owner = THIS_MODULE, | |
789 | .open = w9966_exclusive_open, | |
790 | .release = w9966_exclusive_release, | |
791 | .ioctl = w9966_v4l_ioctl, | |
792 | .read = w9966_v4l_read, | |
793 | }; | |
794 | ||
795 | static struct video_device w9966_template = { | |
796 | .name = W9966_DRIVERNAME, | |
797 | .fops = &w9966_fops, | |
798 | .release = video_device_release_empty, | |
799 | }; | |
800 | ||
801 | ||
802 | /* Initialize camera device. Setup all internal flags, set a | |
803 | default video mode, setup ccd-chip, register v4l device etc.. | |
804 | Also used for 'probing' of hardware. | |
805 | -1 on error */ | |
806 | static int w9966_init(struct w9966_dev *cam, struct parport* port) | |
807 | { | |
808 | if (cam->dev_state != 0) | |
809 | return -1; | |
810 | ||
811 | cam->pport = port; | |
812 | cam->brightness = 128; | |
813 | cam->contrast = 64; | |
814 | cam->color = 64; | |
815 | cam->hue = 0; | |
816 | ||
817 | /* Select requested transfer mode */ | |
818 | switch (parmode) { | |
819 | default: /* Auto-detect (priority: hw-ecp, hw-epp, sw-ecp) */ | |
820 | case 0: | |
821 | if (port->modes & PARPORT_MODE_ECP) | |
822 | cam->ppmode = IEEE1284_MODE_ECP; | |
823 | else if (port->modes & PARPORT_MODE_EPP) | |
824 | cam->ppmode = IEEE1284_MODE_EPP; | |
825 | else | |
826 | cam->ppmode = IEEE1284_MODE_ECP; | |
827 | break; | |
828 | case 1: /* hw- or sw-ecp */ | |
829 | cam->ppmode = IEEE1284_MODE_ECP; | |
830 | break; | |
831 | case 2: /* hw- or sw-epp */ | |
832 | cam->ppmode = IEEE1284_MODE_EPP; | |
833 | break; | |
834 | } | |
835 | ||
836 | /* Tell the parport driver that we exists */ | |
837 | cam->pdev = parport_register_device(port, "w9966", NULL, NULL, NULL, 0, NULL); | |
838 | if (cam->pdev == NULL) { | |
839 | DPRINTF("parport_register_device() failed\n"); | |
840 | return -1; | |
841 | } | |
842 | w9966_setState(cam, W9966_STATE_PDEV, W9966_STATE_PDEV); | |
843 | ||
844 | w9966_pdev_claim(cam); | |
845 | ||
846 | /* Setup a default capture mode */ | |
847 | if (w9966_setup(cam, 0, 0, 1023, 1023, 200, 160) != 0) { | |
848 | DPRINTF("w9966_setup() failed.\n"); | |
849 | return -1; | |
850 | } | |
851 | ||
852 | w9966_pdev_release(cam); | |
853 | ||
854 | /* Fill in the video_device struct and register us to v4l */ | |
855 | memcpy(&cam->vdev, &w9966_template, sizeof(struct video_device)); | |
856 | video_set_drvdata(&cam->vdev, cam); | |
857 | ||
858 | if (video_register_device(&cam->vdev, VFL_TYPE_GRABBER, video_nr) < 0) | |
859 | return -1; | |
860 | ||
861 | w9966_setState(cam, W9966_STATE_VDEV, W9966_STATE_VDEV); | |
862 | ||
863 | /* All ok */ | |
864 | printk(KERN_INFO "w9966cf: Found and initialized a webcam on %s.\n", | |
865 | cam->pport->name); | |
866 | return 0; | |
867 | } | |
868 | ||
869 | ||
870 | /* Terminate everything gracefully */ | |
871 | static void w9966_term(struct w9966_dev *cam) | |
872 | { | |
873 | /* Unregister from v4l */ | |
874 | if (w9966_getState(cam, W9966_STATE_VDEV, W9966_STATE_VDEV)) { | |
875 | video_unregister_device(&cam->vdev); | |
876 | w9966_setState(cam, W9966_STATE_VDEV, 0); | |
877 | } | |
878 | ||
879 | /* Terminate from IEEE1284 mode and release pdev block */ | |
880 | if (w9966_getState(cam, W9966_STATE_PDEV, W9966_STATE_PDEV)) { | |
881 | w9966_pdev_claim(cam); | |
882 | parport_negotiate(cam->pport, IEEE1284_MODE_COMPAT); | |
883 | w9966_pdev_release(cam); | |
884 | } | |
885 | ||
886 | /* Unregister from parport */ | |
887 | if (w9966_getState(cam, W9966_STATE_PDEV, W9966_STATE_PDEV)) { | |
888 | parport_unregister_device(cam->pdev); | |
889 | w9966_setState(cam, W9966_STATE_PDEV, 0); | |
890 | } | |
891 | } | |
892 | ||
1da177e4 | 893 | |
4bfdd586 | 894 | /* Called once for every parport on init */ |
1da177e4 LT |
895 | static void w9966_attach(struct parport *port) |
896 | { | |
897 | int i; | |
d56410e0 | 898 | |
4bfdd586 HV |
899 | for (i = 0; i < W9966_MAXCAMS; i++) { |
900 | if (w9966_cams[i].dev_state != 0) /* Cam is already assigned */ | |
1da177e4 | 901 | continue; |
4bfdd586 | 902 | if (strcmp(pardev[i], "aggressive") == 0 || strcmp(pardev[i], port->name) == 0) { |
1da177e4 | 903 | if (w9966_init(&w9966_cams[i], port) != 0) |
4bfdd586 HV |
904 | w9966_term(&w9966_cams[i]); |
905 | break; /* return */ | |
1da177e4 LT |
906 | } |
907 | } | |
908 | } | |
909 | ||
4bfdd586 | 910 | /* Called once for every parport on termination */ |
1da177e4 LT |
911 | static void w9966_detach(struct parport *port) |
912 | { | |
913 | int i; | |
4bfdd586 | 914 | |
1da177e4 | 915 | for (i = 0; i < W9966_MAXCAMS; i++) |
4bfdd586 HV |
916 | if (w9966_cams[i].dev_state != 0 && w9966_cams[i].pport == port) |
917 | w9966_term(&w9966_cams[i]); | |
1da177e4 LT |
918 | } |
919 | ||
920 | ||
921 | static struct parport_driver w9966_ppd = { | |
922 | .name = W9966_DRIVERNAME, | |
923 | .attach = w9966_attach, | |
924 | .detach = w9966_detach, | |
925 | }; | |
926 | ||
4bfdd586 | 927 | /* Module entry point */ |
1da177e4 LT |
928 | static int __init w9966_mod_init(void) |
929 | { | |
930 | int i; | |
4bfdd586 | 931 | |
1da177e4 LT |
932 | for (i = 0; i < W9966_MAXCAMS; i++) |
933 | w9966_cams[i].dev_state = 0; | |
934 | ||
935 | return parport_register_driver(&w9966_ppd); | |
936 | } | |
937 | ||
4bfdd586 | 938 | /* Module cleanup */ |
1da177e4 LT |
939 | static void __exit w9966_mod_term(void) |
940 | { | |
941 | parport_unregister_driver(&w9966_ppd); | |
942 | } | |
943 | ||
944 | module_init(w9966_mod_init); | |
945 | module_exit(w9966_mod_term); |