Commit | Line | Data |
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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" | |
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 | |
83 | ||
84 | // Empirically determined window limits | |
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 | ||
92 | // Keep track of our current state | |
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; | |
108 | struct parport* pport; | |
109 | struct pardevice* pdev; | |
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 | |
130 | static const char* pardev[] = {[0 ... W9966_MAXCAMS] = ""}; | |
131 | #else | |
132 | static const char* pardev[] = {[0 ... W9966_MAXCAMS] = "aggressive"}; | |
133 | #endif | |
134 | module_param_array(pardev, charp, NULL, 0); | |
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..."); | |
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 | ||
147 | /* | |
148 | * Private data | |
149 | */ | |
150 | ||
151 | static struct w9966_dev w9966_cams[W9966_MAXCAMS]; | |
152 | ||
153 | /* | |
154 | * Private function declares | |
155 | */ | |
156 | ||
157 | static inline void w9966_setState(struct w9966_dev* cam, int mask, int val); | |
158 | static inline int w9966_getState(struct w9966_dev* cam, int mask, int val); | |
159 | static inline void w9966_pdev_claim(struct w9966_dev *vdev); | |
160 | static inline void w9966_pdev_release(struct w9966_dev *vdev); | |
161 | ||
162 | static int w9966_rReg(struct w9966_dev* cam, int reg); | |
163 | static int w9966_wReg(struct w9966_dev* cam, int reg, int data); | |
164 | #if 0 | |
165 | static int w9966_rReg_i2c(struct w9966_dev* cam, int reg); | |
166 | #endif | |
167 | static int w9966_wReg_i2c(struct w9966_dev* cam, int reg, int data); | |
168 | static int w9966_findlen(int near, int size, int maxlen); | |
169 | static int w9966_calcscale(int size, int min, int max, int* beg, int* end, unsigned char* factor); | |
170 | static int w9966_setup(struct w9966_dev* cam, int x1, int y1, int x2, int y2, int w, int h); | |
171 | ||
172 | static int w9966_init(struct w9966_dev* cam, struct parport* port); | |
173 | static void w9966_term(struct w9966_dev* cam); | |
174 | ||
175 | static inline void w9966_i2c_setsda(struct w9966_dev* cam, int state); | |
176 | static inline int w9966_i2c_setscl(struct w9966_dev* cam, int state); | |
177 | static inline int w9966_i2c_getsda(struct w9966_dev* cam); | |
178 | static inline int w9966_i2c_getscl(struct w9966_dev* cam); | |
179 | static int w9966_i2c_wbyte(struct w9966_dev* cam, int data); | |
180 | #if 0 | |
181 | static int w9966_i2c_rbyte(struct w9966_dev* cam); | |
182 | #endif | |
183 | ||
069b7479 | 184 | static long w9966_v4l_ioctl(struct file *file, |
1da177e4 LT |
185 | unsigned int cmd, unsigned long arg); |
186 | static ssize_t w9966_v4l_read(struct file *file, char __user *buf, | |
187 | size_t count, loff_t *ppos); | |
188 | ||
bec43661 | 189 | static int w9966_exclusive_open(struct file *file) |
7d43cd53 | 190 | { |
c170ecf4 | 191 | struct w9966_dev *cam = video_drvdata(file); |
7d43cd53 HV |
192 | |
193 | return test_and_set_bit(0, &cam->in_use) ? -EBUSY : 0; | |
194 | } | |
195 | ||
bec43661 | 196 | static int w9966_exclusive_release(struct file *file) |
7d43cd53 | 197 | { |
c170ecf4 | 198 | struct w9966_dev *cam = video_drvdata(file); |
7d43cd53 HV |
199 | |
200 | clear_bit(0, &cam->in_use); | |
201 | return 0; | |
202 | } | |
203 | ||
bec43661 | 204 | static const struct v4l2_file_operations w9966_fops = { |
1da177e4 | 205 | .owner = THIS_MODULE, |
7d43cd53 HV |
206 | .open = w9966_exclusive_open, |
207 | .release = w9966_exclusive_release, | |
1da177e4 LT |
208 | .ioctl = w9966_v4l_ioctl, |
209 | .read = w9966_v4l_read, | |
1da177e4 LT |
210 | }; |
211 | static struct video_device w9966_template = { | |
1da177e4 | 212 | .name = W9966_DRIVERNAME, |
1da177e4 | 213 | .fops = &w9966_fops, |
aa5e90af | 214 | .release = video_device_release_empty, |
1da177e4 LT |
215 | }; |
216 | ||
217 | /* | |
218 | * Private function defines | |
219 | */ | |
220 | ||
221 | ||
d56410e0 | 222 | // Set camera phase flags, so we know what to uninit when terminating |
1da177e4 LT |
223 | static inline void w9966_setState(struct w9966_dev* cam, int mask, int val) |
224 | { | |
225 | cam->dev_state = (cam->dev_state & ~mask) ^ val; | |
226 | } | |
227 | ||
228 | // Get camera phase flags | |
229 | static inline int w9966_getState(struct w9966_dev* cam, int mask, int val) | |
230 | { | |
231 | return ((cam->dev_state & mask) == val); | |
232 | } | |
233 | ||
234 | // Claim parport for ourself | |
235 | static inline void w9966_pdev_claim(struct w9966_dev* cam) | |
236 | { | |
237 | if (w9966_getState(cam, W9966_STATE_CLAIMED, W9966_STATE_CLAIMED)) | |
238 | return; | |
239 | parport_claim_or_block(cam->pdev); | |
240 | w9966_setState(cam, W9966_STATE_CLAIMED, W9966_STATE_CLAIMED); | |
241 | } | |
242 | ||
243 | // Release parport for others to use | |
244 | static inline void w9966_pdev_release(struct w9966_dev* cam) | |
245 | { | |
246 | if (w9966_getState(cam, W9966_STATE_CLAIMED, 0)) | |
247 | return; | |
248 | parport_release(cam->pdev); | |
249 | w9966_setState(cam, W9966_STATE_CLAIMED, 0); | |
250 | } | |
d56410e0 | 251 | |
1da177e4 LT |
252 | // Read register from W9966 interface-chip |
253 | // Expects a claimed pdev | |
254 | // -1 on error, else register data (byte) | |
255 | static int w9966_rReg(struct w9966_dev* cam, int reg) | |
256 | { | |
257 | // ECP, read, regtransfer, REG, REG, REG, REG, REG | |
258 | const unsigned char addr = 0x80 | (reg & 0x1f); | |
259 | unsigned char val; | |
d56410e0 | 260 | |
1da177e4 LT |
261 | if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_ADDR) != 0) |
262 | return -1; | |
263 | if (parport_write(cam->pport, &addr, 1) != 1) | |
264 | return -1; | |
265 | if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_DATA) != 0) | |
266 | return -1; | |
267 | if (parport_read(cam->pport, &val, 1) != 1) | |
268 | return -1; | |
269 | ||
270 | return val; | |
271 | } | |
272 | ||
273 | // Write register to W9966 interface-chip | |
274 | // Expects a claimed pdev | |
275 | // -1 on error | |
276 | static int w9966_wReg(struct w9966_dev* cam, int reg, int data) | |
277 | { | |
278 | // ECP, write, regtransfer, REG, REG, REG, REG, REG | |
279 | const unsigned char addr = 0xc0 | (reg & 0x1f); | |
280 | const unsigned char val = data; | |
d56410e0 | 281 | |
1da177e4 LT |
282 | if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_ADDR) != 0) |
283 | return -1; | |
284 | if (parport_write(cam->pport, &addr, 1) != 1) | |
285 | return -1; | |
286 | if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_DATA) != 0) | |
287 | return -1; | |
288 | if (parport_write(cam->pport, &val, 1) != 1) | |
289 | return -1; | |
290 | ||
291 | return 0; | |
292 | } | |
293 | ||
294 | // Initialize camera device. Setup all internal flags, set a | |
295 | // default video mode, setup ccd-chip, register v4l device etc.. | |
296 | // Also used for 'probing' of hardware. | |
297 | // -1 on error | |
298 | static int w9966_init(struct w9966_dev* cam, struct parport* port) | |
299 | { | |
300 | if (cam->dev_state != 0) | |
301 | return -1; | |
d56410e0 | 302 | |
1da177e4 LT |
303 | cam->pport = port; |
304 | cam->brightness = 128; | |
305 | cam->contrast = 64; | |
306 | cam->color = 64; | |
307 | cam->hue = 0; | |
308 | ||
309 | // Select requested transfer mode | |
310 | switch(parmode) | |
311 | { | |
312 | default: // Auto-detect (priority: hw-ecp, hw-epp, sw-ecp) | |
313 | case 0: | |
314 | if (port->modes & PARPORT_MODE_ECP) | |
315 | cam->ppmode = IEEE1284_MODE_ECP; | |
316 | else if (port->modes & PARPORT_MODE_EPP) | |
317 | cam->ppmode = IEEE1284_MODE_EPP; | |
318 | else | |
319 | cam->ppmode = IEEE1284_MODE_ECP; | |
d56410e0 | 320 | break; |
1da177e4 LT |
321 | case 1: // hw- or sw-ecp |
322 | cam->ppmode = IEEE1284_MODE_ECP; | |
323 | break; | |
324 | case 2: // hw- or sw-epp | |
325 | cam->ppmode = IEEE1284_MODE_EPP; | |
326 | break; | |
327 | } | |
d56410e0 | 328 | |
1da177e4 LT |
329 | // Tell the parport driver that we exists |
330 | cam->pdev = parport_register_device(port, "w9966", NULL, NULL, NULL, 0, NULL); | |
331 | if (cam->pdev == NULL) { | |
332 | DPRINTF("parport_register_device() failed\n"); | |
333 | return -1; | |
334 | } | |
335 | w9966_setState(cam, W9966_STATE_PDEV, W9966_STATE_PDEV); | |
336 | ||
337 | w9966_pdev_claim(cam); | |
d56410e0 | 338 | |
1da177e4 LT |
339 | // Setup a default capture mode |
340 | if (w9966_setup(cam, 0, 0, 1023, 1023, 200, 160) != 0) { | |
341 | DPRINTF("w9966_setup() failed.\n"); | |
342 | return -1; | |
343 | } | |
344 | ||
345 | w9966_pdev_release(cam); | |
346 | ||
347 | // Fill in the video_device struct and register us to v4l | |
348 | memcpy(&cam->vdev, &w9966_template, sizeof(struct video_device)); | |
601e9444 | 349 | video_set_drvdata(&cam->vdev, cam); |
1da177e4 | 350 | |
dc60de33 | 351 | if (video_register_device(&cam->vdev, VFL_TYPE_GRABBER, video_nr) < 0) |
1da177e4 | 352 | return -1; |
d56410e0 | 353 | |
1da177e4 | 354 | w9966_setState(cam, W9966_STATE_VDEV, W9966_STATE_VDEV); |
d56410e0 | 355 | |
1da177e4 LT |
356 | // All ok |
357 | printk( | |
358 | "w9966cf: Found and initialized a webcam on %s.\n", | |
359 | cam->pport->name | |
360 | ); | |
361 | return 0; | |
362 | } | |
363 | ||
364 | ||
365 | // Terminate everything gracefully | |
366 | static void w9966_term(struct w9966_dev* cam) | |
367 | { | |
368 | // Unregister from v4l | |
369 | if (w9966_getState(cam, W9966_STATE_VDEV, W9966_STATE_VDEV)) { | |
370 | video_unregister_device(&cam->vdev); | |
371 | w9966_setState(cam, W9966_STATE_VDEV, 0); | |
372 | } | |
373 | ||
374 | // Terminate from IEEE1284 mode and release pdev block | |
375 | if (w9966_getState(cam, W9966_STATE_PDEV, W9966_STATE_PDEV)) { | |
376 | w9966_pdev_claim(cam); | |
377 | parport_negotiate(cam->pport, IEEE1284_MODE_COMPAT); | |
378 | w9966_pdev_release(cam); | |
379 | } | |
380 | ||
381 | // Unregister from parport | |
382 | if (w9966_getState(cam, W9966_STATE_PDEV, W9966_STATE_PDEV)) { | |
383 | parport_unregister_device(cam->pdev); | |
384 | w9966_setState(cam, W9966_STATE_PDEV, 0); | |
385 | } | |
386 | } | |
387 | ||
388 | ||
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 | |
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 | ||
398 | for(len = size+1;len < maxlen;len++) | |
399 | { | |
400 | int err; | |
401 | if ( ((64*size) %len) != 0) | |
402 | continue; | |
403 | ||
404 | err = abs(near - len); | |
405 | ||
406 | // Only continue as long as we keep getting better values | |
407 | if (err > besterr) | |
408 | break; | |
d56410e0 | 409 | |
1da177e4 LT |
410 | besterr = err; |
411 | bestlen = len; | |
412 | } | |
413 | ||
414 | return bestlen; | |
415 | } | |
416 | ||
d56410e0 | 417 | // Modify capture window (if necessary) |
1da177e4 LT |
418 | // and calculate downscaling |
419 | // Return -1 on error | |
420 | static int w9966_calcscale(int size, int min, int max, int* beg, int* end, unsigned char* factor) | |
421 | { | |
422 | int maxlen = max - min; | |
423 | int len = *end - *beg + 1; | |
424 | int newlen = w9966_findlen(len, size, maxlen); | |
d56410e0 | 425 | int err = newlen - len; |
1da177e4 LT |
426 | |
427 | // Check for bad format | |
428 | if (newlen > maxlen || newlen < size) | |
429 | return -1; | |
430 | ||
431 | // Set factor (6 bit fixed) | |
432 | *factor = (64*size) / newlen; | |
433 | if (*factor == 64) | |
434 | *factor = 0x00; // downscale is disabled | |
435 | else | |
436 | *factor |= 0x80; // set downscale-enable bit | |
437 | ||
438 | // Modify old beginning and end | |
439 | *beg -= err / 2; | |
440 | *end += err - (err / 2); | |
441 | ||
442 | // Move window if outside borders | |
443 | if (*beg < min) { | |
444 | *end += min - *beg; | |
445 | *beg += min - *beg; | |
446 | } | |
447 | if (*end > max) { | |
448 | *beg -= *end - max; | |
449 | *end -= *end - max; | |
450 | } | |
451 | ||
452 | return 0; | |
453 | } | |
454 | ||
455 | // Setup the cameras capture window etc. | |
456 | // Expects a claimed pdev | |
457 | // return -1 on error | |
458 | static int w9966_setup(struct w9966_dev* cam, int x1, int y1, int x2, int y2, int w, int h) | |
459 | { | |
460 | unsigned int i; | |
461 | unsigned int enh_s, enh_e; | |
462 | unsigned char scale_x, scale_y; | |
463 | unsigned char regs[0x1c]; | |
464 | unsigned char saa7111_regs[] = { | |
465 | 0x21, 0x00, 0xd8, 0x23, 0x00, 0x80, 0x80, 0x00, | |
466 | 0x88, 0x10, 0x80, 0x40, 0x40, 0x00, 0x01, 0x00, | |
467 | 0x48, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
468 | 0x00, 0x00, 0x00, 0x71, 0xe7, 0x00, 0x00, 0xc0 | |
469 | }; | |
d56410e0 MCC |
470 | |
471 | ||
1da177e4 LT |
472 | if (w*h*2 > W9966_SRAMSIZE) |
473 | { | |
474 | DPRINTF("capture window exceeds SRAM size!.\n"); | |
475 | w = 200; h = 160; // Pick default values | |
476 | } | |
477 | ||
478 | w &= ~0x1; | |
479 | if (w < 2) w = 2; | |
480 | if (h < 1) h = 1; | |
481 | if (w > W9966_WND_MAX_W) w = W9966_WND_MAX_W; | |
482 | if (h > W9966_WND_MAX_H) h = W9966_WND_MAX_H; | |
483 | ||
484 | cam->width = w; | |
485 | cam->height = h; | |
486 | ||
d56410e0 | 487 | enh_s = 0; |
1da177e4 | 488 | enh_e = w*h*2; |
d56410e0 | 489 | |
1da177e4 LT |
490 | // Modify capture window if necessary and calculate downscaling |
491 | if ( | |
492 | w9966_calcscale(w, W9966_WND_MIN_X, W9966_WND_MAX_X, &x1, &x2, &scale_x) != 0 || | |
493 | w9966_calcscale(h, W9966_WND_MIN_Y, W9966_WND_MAX_Y, &y1, &y2, &scale_y) != 0 | |
494 | ) return -1; | |
495 | ||
496 | DPRINTF( | |
497 | "%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 | ); | |
d56410e0 | 500 | |
1da177e4 LT |
501 | // Setup registers |
502 | regs[0x00] = 0x00; // Set normal operation | |
503 | regs[0x01] = 0x18; // Capture mode | |
504 | regs[0x02] = scale_y; // V-scaling | |
505 | regs[0x03] = scale_x; // H-scaling | |
d56410e0 MCC |
506 | |
507 | // Capture window | |
1da177e4 LT |
508 | regs[0x04] = (x1 & 0x0ff); // X-start (8 low bits) |
509 | regs[0x05] = (x1 & 0x300)>>8; // X-start (2 high bits) | |
510 | regs[0x06] = (y1 & 0x0ff); // Y-start (8 low bits) | |
511 | regs[0x07] = (y1 & 0x300)>>8; // Y-start (2 high bits) | |
512 | regs[0x08] = (x2 & 0x0ff); // X-end (8 low bits) | |
513 | regs[0x09] = (x2 & 0x300)>>8; // X-end (2 high bits) | |
514 | regs[0x0a] = (y2 & 0x0ff); // Y-end (8 low bits) | |
515 | ||
516 | regs[0x0c] = W9966_SRAMID; // SRAM-banks (1x 128kb) | |
d56410e0 | 517 | |
1da177e4 LT |
518 | // Enhancement layer |
519 | regs[0x0d] = (enh_s& 0x000ff); // Enh. start (0-7) | |
520 | regs[0x0e] = (enh_s& 0x0ff00)>>8; // Enh. start (8-15) | |
521 | regs[0x0f] = (enh_s& 0x70000)>>16; // Enh. start (16-17/18??) | |
522 | regs[0x10] = (enh_e& 0x000ff); // Enh. end (0-7) | |
523 | regs[0x11] = (enh_e& 0x0ff00)>>8; // Enh. end (8-15) | |
524 | regs[0x12] = (enh_e& 0x70000)>>16; // Enh. end (16-17/18??) | |
525 | ||
526 | // Misc | |
527 | regs[0x13] = 0x40; // VEE control (raw 4:2:2) | |
528 | regs[0x17] = 0x00; // ??? | |
529 | regs[0x18] = cam->i2c_state = 0x00; // Serial bus | |
530 | regs[0x19] = 0xff; // I/O port direction control | |
531 | regs[0x1a] = 0xff; // I/O port data register | |
532 | regs[0x1b] = 0x10; // ??? | |
d56410e0 | 533 | |
1da177e4 LT |
534 | // SAA7111 chip settings |
535 | saa7111_regs[0x0a] = cam->brightness; | |
536 | saa7111_regs[0x0b] = cam->contrast; | |
537 | saa7111_regs[0x0c] = cam->color; | |
538 | saa7111_regs[0x0d] = cam->hue; | |
539 | ||
540 | // Reset (ECP-fifo & serial-bus) | |
541 | if (w9966_wReg(cam, 0x00, 0x03) == -1) | |
542 | return -1; | |
543 | ||
544 | // Write regs to w9966cf chip | |
545 | for (i = 0; i < 0x1c; i++) | |
546 | if (w9966_wReg(cam, i, regs[i]) == -1) | |
547 | return -1; | |
548 | ||
549 | // Write regs to saa7111 chip | |
550 | for (i = 0; i < 0x20; i++) | |
551 | if (w9966_wReg_i2c(cam, i, saa7111_regs[i]) == -1) | |
552 | return -1; | |
553 | ||
554 | return 0; | |
555 | } | |
556 | ||
557 | /* | |
558 | * Ugly and primitive i2c protocol functions | |
559 | */ | |
560 | ||
561 | // Sets the data line on the i2c bus. | |
562 | // Expects a claimed pdev. | |
563 | static inline void w9966_i2c_setsda(struct w9966_dev* cam, int state) | |
564 | { | |
565 | if (state) | |
566 | cam->i2c_state |= W9966_I2C_W_DATA; | |
567 | else | |
568 | cam->i2c_state &= ~W9966_I2C_W_DATA; | |
d56410e0 | 569 | |
1da177e4 LT |
570 | w9966_wReg(cam, 0x18, cam->i2c_state); |
571 | udelay(5); | |
572 | } | |
573 | ||
574 | // Get peripheral clock line | |
575 | // Expects a claimed pdev. | |
576 | static inline int w9966_i2c_getscl(struct w9966_dev* cam) | |
577 | { | |
578 | const unsigned char state = w9966_rReg(cam, 0x18); | |
579 | return ((state & W9966_I2C_R_CLOCK) > 0); | |
580 | } | |
581 | ||
582 | // Sets the clock line on the i2c bus. | |
583 | // Expects a claimed pdev. -1 on error | |
584 | static inline int w9966_i2c_setscl(struct w9966_dev* cam, int state) | |
585 | { | |
586 | unsigned long timeout; | |
587 | ||
588 | if (state) | |
589 | cam->i2c_state |= W9966_I2C_W_CLOCK; | |
590 | else | |
591 | cam->i2c_state &= ~W9966_I2C_W_CLOCK; | |
592 | ||
593 | w9966_wReg(cam, 0x18, cam->i2c_state); | |
594 | udelay(5); | |
d56410e0 | 595 | |
1da177e4 LT |
596 | // we go to high, we also expect the peripheral to ack. |
597 | if (state) { | |
598 | timeout = jiffies + 100; | |
599 | while (!w9966_i2c_getscl(cam)) { | |
600 | if (time_after(jiffies, timeout)) | |
601 | return -1; | |
602 | } | |
603 | } | |
604 | return 0; | |
605 | } | |
606 | ||
607 | // Get peripheral data line | |
608 | // Expects a claimed pdev. | |
609 | static inline int w9966_i2c_getsda(struct w9966_dev* cam) | |
610 | { | |
611 | const unsigned char state = w9966_rReg(cam, 0x18); | |
612 | return ((state & W9966_I2C_R_DATA) > 0); | |
613 | } | |
614 | ||
615 | // Write a byte with ack to the i2c bus. | |
616 | // Expects a claimed pdev. -1 on error | |
617 | static int w9966_i2c_wbyte(struct w9966_dev* cam, int data) | |
618 | { | |
619 | int i; | |
620 | for (i = 7; i >= 0; i--) | |
621 | { | |
622 | w9966_i2c_setsda(cam, (data >> i) & 0x01); | |
623 | ||
624 | if (w9966_i2c_setscl(cam, 1) == -1) | |
d56410e0 | 625 | return -1; |
1da177e4 LT |
626 | w9966_i2c_setscl(cam, 0); |
627 | } | |
628 | ||
629 | w9966_i2c_setsda(cam, 1); | |
d56410e0 | 630 | |
1da177e4 LT |
631 | if (w9966_i2c_setscl(cam, 1) == -1) |
632 | return -1; | |
633 | w9966_i2c_setscl(cam, 0); | |
d56410e0 | 634 | |
1da177e4 LT |
635 | return 0; |
636 | } | |
637 | ||
638 | // Read a data byte with ack from the i2c-bus | |
639 | // Expects a claimed pdev. -1 on error | |
640 | #if 0 | |
641 | static int w9966_i2c_rbyte(struct w9966_dev* cam) | |
642 | { | |
643 | unsigned char data = 0x00; | |
d56410e0 MCC |
644 | int i; |
645 | ||
1da177e4 LT |
646 | w9966_i2c_setsda(cam, 1); |
647 | ||
648 | for (i = 0; i < 8; i++) | |
649 | { | |
650 | if (w9966_i2c_setscl(cam, 1) == -1) | |
651 | return -1; | |
652 | data = data << 1; | |
653 | if (w9966_i2c_getsda(cam)) | |
654 | data |= 0x01; | |
d56410e0 | 655 | |
1da177e4 LT |
656 | w9966_i2c_setscl(cam, 0); |
657 | } | |
658 | return data; | |
659 | } | |
660 | #endif | |
661 | ||
662 | // Read a register from the i2c device. | |
663 | // Expects claimed pdev. -1 on error | |
664 | #if 0 | |
665 | static int w9966_rReg_i2c(struct w9966_dev* cam, int reg) | |
666 | { | |
667 | int data; | |
668 | ||
669 | w9966_i2c_setsda(cam, 0); | |
670 | w9966_i2c_setscl(cam, 0); | |
671 | ||
672 | if ( | |
673 | w9966_i2c_wbyte(cam, W9966_I2C_W_ID) == -1 || | |
674 | w9966_i2c_wbyte(cam, reg) == -1 | |
675 | ) | |
676 | return -1; | |
677 | ||
678 | w9966_i2c_setsda(cam, 1); | |
679 | if (w9966_i2c_setscl(cam, 1) == -1) | |
680 | return -1; | |
681 | w9966_i2c_setsda(cam, 0); | |
682 | w9966_i2c_setscl(cam, 0); | |
683 | ||
684 | if ( | |
685 | w9966_i2c_wbyte(cam, W9966_I2C_R_ID) == -1 || | |
686 | (data = w9966_i2c_rbyte(cam)) == -1 | |
687 | ) | |
688 | return -1; | |
689 | ||
690 | w9966_i2c_setsda(cam, 0); | |
d56410e0 | 691 | |
1da177e4 LT |
692 | if (w9966_i2c_setscl(cam, 1) == -1) |
693 | return -1; | |
694 | w9966_i2c_setsda(cam, 1); | |
d56410e0 | 695 | |
1da177e4 LT |
696 | return data; |
697 | } | |
698 | #endif | |
699 | ||
700 | // Write a register to the i2c device. | |
701 | // Expects claimed pdev. -1 on error | |
702 | static int w9966_wReg_i2c(struct w9966_dev* cam, int reg, int data) | |
703 | { | |
704 | w9966_i2c_setsda(cam, 0); | |
705 | w9966_i2c_setscl(cam, 0); | |
706 | ||
707 | if ( | |
708 | w9966_i2c_wbyte(cam, W9966_I2C_W_ID) == -1 || | |
709 | w9966_i2c_wbyte(cam, reg) == -1 || | |
710 | w9966_i2c_wbyte(cam, data) == -1 | |
711 | ) | |
712 | return -1; | |
713 | ||
714 | w9966_i2c_setsda(cam, 0); | |
715 | if (w9966_i2c_setscl(cam, 1) == -1) | |
716 | return -1; | |
d56410e0 | 717 | |
1da177e4 LT |
718 | w9966_i2c_setsda(cam, 1); |
719 | ||
720 | return 0; | |
721 | } | |
722 | ||
723 | /* | |
724 | * Video4linux interfacing | |
725 | */ | |
726 | ||
069b7479 | 727 | static long w9966_v4l_do_ioctl(struct file *file, unsigned int cmd, void *arg) |
1da177e4 | 728 | { |
c170ecf4 | 729 | struct w9966_dev *cam = video_drvdata(file); |
d56410e0 | 730 | |
1da177e4 LT |
731 | switch(cmd) |
732 | { | |
733 | case VIDIOCGCAP: | |
734 | { | |
735 | static struct video_capability vcap = { | |
736 | .name = W9966_DRIVERNAME, | |
737 | .type = VID_TYPE_CAPTURE | VID_TYPE_SCALES, | |
738 | .channels = 1, | |
739 | .maxwidth = W9966_WND_MAX_W, | |
740 | .maxheight = W9966_WND_MAX_H, | |
741 | .minwidth = 2, | |
742 | .minheight = 1, | |
743 | }; | |
744 | struct video_capability *cap = arg; | |
745 | *cap = vcap; | |
746 | return 0; | |
747 | } | |
748 | case VIDIOCGCHAN: | |
749 | { | |
750 | struct video_channel *vch = arg; | |
751 | if(vch->channel != 0) // We only support one channel (#0) | |
752 | return -EINVAL; | |
753 | memset(vch,0,sizeof(*vch)); | |
754 | strcpy(vch->name, "CCD-input"); | |
755 | vch->type = VIDEO_TYPE_CAMERA; | |
756 | return 0; | |
757 | } | |
758 | case VIDIOCSCHAN: | |
759 | { | |
760 | struct video_channel *vch = arg; | |
761 | if(vch->channel != 0) | |
762 | return -EINVAL; | |
763 | return 0; | |
764 | } | |
765 | case VIDIOCGTUNER: | |
766 | { | |
767 | struct video_tuner *vtune = arg; | |
768 | if(vtune->tuner != 0) | |
769 | return -EINVAL; | |
770 | strcpy(vtune->name, "no tuner"); | |
771 | vtune->rangelow = 0; | |
772 | vtune->rangehigh = 0; | |
773 | vtune->flags = VIDEO_TUNER_NORM; | |
774 | vtune->mode = VIDEO_MODE_AUTO; | |
775 | vtune->signal = 0xffff; | |
776 | return 0; | |
777 | } | |
778 | case VIDIOCSTUNER: | |
779 | { | |
780 | struct video_tuner *vtune = arg; | |
781 | if (vtune->tuner != 0) | |
782 | return -EINVAL; | |
783 | if (vtune->mode != VIDEO_MODE_AUTO) | |
784 | return -EINVAL; | |
785 | return 0; | |
786 | } | |
787 | case VIDIOCGPICT: | |
788 | { | |
789 | struct video_picture vpic = { | |
790 | cam->brightness << 8, // brightness | |
791 | (cam->hue + 128) << 8, // hue | |
792 | cam->color << 9, // color | |
793 | cam->contrast << 9, // contrast | |
794 | 0x8000, // whiteness | |
795 | 16, VIDEO_PALETTE_YUV422// bpp, palette format | |
796 | }; | |
797 | struct video_picture *pic = arg; | |
798 | *pic = vpic; | |
799 | return 0; | |
800 | } | |
801 | case VIDIOCSPICT: | |
802 | { | |
803 | struct video_picture *vpic = arg; | |
2485eb0a | 804 | if (vpic->depth != 16 || (vpic->palette != VIDEO_PALETTE_YUV422 && vpic->palette != VIDEO_PALETTE_YUYV)) |
1da177e4 | 805 | return -EINVAL; |
d56410e0 | 806 | |
1da177e4 LT |
807 | cam->brightness = vpic->brightness >> 8; |
808 | cam->hue = (vpic->hue >> 8) - 128; | |
809 | cam->color = vpic->colour >> 9; | |
810 | cam->contrast = vpic->contrast >> 9; | |
811 | ||
812 | w9966_pdev_claim(cam); | |
d56410e0 | 813 | |
1da177e4 LT |
814 | if ( |
815 | w9966_wReg_i2c(cam, 0x0a, cam->brightness) == -1 || | |
816 | w9966_wReg_i2c(cam, 0x0b, cam->contrast) == -1 || | |
817 | w9966_wReg_i2c(cam, 0x0c, cam->color) == -1 || | |
818 | w9966_wReg_i2c(cam, 0x0d, cam->hue) == -1 | |
819 | ) { | |
820 | w9966_pdev_release(cam); | |
821 | return -EIO; | |
822 | } | |
d56410e0 | 823 | |
1da177e4 LT |
824 | w9966_pdev_release(cam); |
825 | return 0; | |
826 | } | |
827 | case VIDIOCSWIN: | |
828 | { | |
829 | int ret; | |
830 | struct video_window *vwin = arg; | |
d56410e0 | 831 | |
1da177e4 LT |
832 | if (vwin->flags != 0) |
833 | return -EINVAL; | |
834 | if (vwin->clipcount != 0) | |
835 | return -EINVAL; | |
836 | if (vwin->width < 2 || vwin->width > W9966_WND_MAX_W) | |
d56410e0 | 837 | return -EINVAL; |
1da177e4 LT |
838 | if (vwin->height < 1 || vwin->height > W9966_WND_MAX_H) |
839 | return -EINVAL; | |
840 | ||
841 | // Update camera regs | |
842 | w9966_pdev_claim(cam); | |
843 | ret = w9966_setup(cam, 0, 0, 1023, 1023, vwin->width, vwin->height); | |
844 | w9966_pdev_release(cam); | |
d56410e0 | 845 | |
1da177e4 LT |
846 | if (ret != 0) { |
847 | DPRINTF("VIDIOCSWIN: w9966_setup() failed.\n"); | |
848 | return -EIO; | |
849 | } | |
d56410e0 | 850 | |
1da177e4 LT |
851 | return 0; |
852 | } | |
853 | case VIDIOCGWIN: | |
854 | { | |
855 | struct video_window *vwin = arg; | |
856 | memset(vwin, 0, sizeof(*vwin)); | |
857 | vwin->width = cam->width; | |
858 | vwin->height = cam->height; | |
859 | return 0; | |
860 | } | |
861 | // Unimplemented | |
d56410e0 | 862 | case VIDIOCCAPTURE: |
1da177e4 LT |
863 | case VIDIOCGFBUF: |
864 | case VIDIOCSFBUF: | |
865 | case VIDIOCKEY: | |
866 | case VIDIOCGFREQ: | |
867 | case VIDIOCSFREQ: | |
868 | case VIDIOCGAUDIO: | |
869 | case VIDIOCSAUDIO: | |
870 | return -EINVAL; | |
871 | default: | |
872 | return -ENOIOCTLCMD; | |
873 | } | |
874 | return 0; | |
875 | } | |
876 | ||
069b7479 | 877 | static long w9966_v4l_ioctl(struct file *file, |
1da177e4 LT |
878 | unsigned int cmd, unsigned long arg) |
879 | { | |
f473bf76 | 880 | return video_usercopy(file, cmd, arg, w9966_v4l_do_ioctl); |
1da177e4 LT |
881 | } |
882 | ||
883 | // Capture data | |
884 | static ssize_t w9966_v4l_read(struct file *file, char __user *buf, | |
885 | size_t count, loff_t *ppos) | |
886 | { | |
c170ecf4 | 887 | struct w9966_dev *cam = video_drvdata(file); |
1da177e4 LT |
888 | unsigned char addr = 0xa0; // ECP, read, CCD-transfer, 00000 |
889 | unsigned char __user *dest = (unsigned char __user *)buf; | |
890 | unsigned long dleft = count; | |
891 | unsigned char *tbuf; | |
d56410e0 | 892 | |
1da177e4 LT |
893 | // Why would anyone want more than this?? |
894 | if (count > cam->width * cam->height * 2) | |
895 | return -EINVAL; | |
d56410e0 | 896 | |
1da177e4 LT |
897 | w9966_pdev_claim(cam); |
898 | w9966_wReg(cam, 0x00, 0x02); // Reset ECP-FIFO buffer | |
899 | w9966_wReg(cam, 0x00, 0x00); // Return to normal operation | |
900 | w9966_wReg(cam, 0x01, 0x98); // Enable capture | |
901 | ||
d56410e0 | 902 | // write special capture-addr and negotiate into data transfer |
1da177e4 LT |
903 | if ( |
904 | (parport_negotiate(cam->pport, cam->ppmode|IEEE1284_ADDR) != 0 )|| | |
905 | (parport_write(cam->pport, &addr, 1) != 1 )|| | |
906 | (parport_negotiate(cam->pport, cam->ppmode|IEEE1284_DATA) != 0 ) | |
907 | ) { | |
908 | w9966_pdev_release(cam); | |
909 | return -EFAULT; | |
910 | } | |
911 | ||
912 | tbuf = kmalloc(W9966_RBUFFER, GFP_KERNEL); | |
913 | if (tbuf == NULL) { | |
914 | count = -ENOMEM; | |
915 | goto out; | |
916 | } | |
917 | ||
918 | while(dleft > 0) | |
919 | { | |
920 | unsigned long tsize = (dleft > W9966_RBUFFER) ? W9966_RBUFFER : dleft; | |
d56410e0 | 921 | |
1da177e4 LT |
922 | if (parport_read(cam->pport, tbuf, tsize) < tsize) { |
923 | count = -EFAULT; | |
924 | goto out; | |
925 | } | |
926 | if (copy_to_user(dest, tbuf, tsize) != 0) { | |
927 | count = -EFAULT; | |
928 | goto out; | |
929 | } | |
930 | dest += tsize; | |
931 | dleft -= tsize; | |
932 | } | |
933 | ||
934 | w9966_wReg(cam, 0x01, 0x18); // Disable capture | |
935 | ||
936 | out: | |
937 | kfree(tbuf); | |
938 | w9966_pdev_release(cam); | |
939 | ||
940 | return count; | |
941 | } | |
942 | ||
943 | ||
944 | // Called once for every parport on init | |
945 | static void w9966_attach(struct parport *port) | |
946 | { | |
947 | int i; | |
d56410e0 | 948 | |
1da177e4 LT |
949 | for (i = 0; i < W9966_MAXCAMS; i++) |
950 | { | |
951 | if (w9966_cams[i].dev_state != 0) // Cam is already assigned | |
952 | continue; | |
953 | if ( | |
954 | strcmp(pardev[i], "aggressive") == 0 || | |
955 | strcmp(pardev[i], port->name) == 0 | |
956 | ) { | |
957 | if (w9966_init(&w9966_cams[i], port) != 0) | |
958 | w9966_term(&w9966_cams[i]); | |
959 | break; // return | |
960 | } | |
961 | } | |
962 | } | |
963 | ||
964 | // Called once for every parport on termination | |
965 | static void w9966_detach(struct parport *port) | |
966 | { | |
967 | int i; | |
968 | for (i = 0; i < W9966_MAXCAMS; i++) | |
969 | if (w9966_cams[i].dev_state != 0 && w9966_cams[i].pport == port) | |
970 | w9966_term(&w9966_cams[i]); | |
971 | } | |
972 | ||
973 | ||
974 | static struct parport_driver w9966_ppd = { | |
975 | .name = W9966_DRIVERNAME, | |
976 | .attach = w9966_attach, | |
977 | .detach = w9966_detach, | |
978 | }; | |
979 | ||
980 | // Module entry point | |
981 | static int __init w9966_mod_init(void) | |
982 | { | |
983 | int i; | |
984 | for (i = 0; i < W9966_MAXCAMS; i++) | |
985 | w9966_cams[i].dev_state = 0; | |
986 | ||
987 | return parport_register_driver(&w9966_ppd); | |
988 | } | |
989 | ||
990 | // Module cleanup | |
991 | static void __exit w9966_mod_term(void) | |
992 | { | |
993 | parport_unregister_driver(&w9966_ppd); | |
994 | } | |
995 | ||
996 | module_init(w9966_mod_init); | |
997 | module_exit(w9966_mod_term); |