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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> |
5e87efa3 | 61 | #include <media/v4l2-common.h> |
35ea11ff | 62 | #include <media/v4l2-ioctl.h> |
1da177e4 LT |
63 | #include <linux/parport.h> |
64 | ||
ff699e6b | 65 | /*#define DEBUG*/ /* Undef me for production */ |
1da177e4 LT |
66 | |
67 | #ifdef DEBUG | |
7e28adb2 | 68 | #define DPRINTF(x, a...) printk(KERN_DEBUG "W9966: %s(): "x, __func__ , ##a) |
1da177e4 LT |
69 | #else |
70 | #define DPRINTF(x...) | |
71 | #endif | |
72 | ||
73 | /* | |
74 | * Defines, simple typedefs etc. | |
75 | */ | |
76 | ||
77 | #define W9966_DRIVERNAME "W9966CF Webcam" | |
78 | #define W9966_MAXCAMS 4 // Maximum number of cameras | |
79 | #define W9966_RBUFFER 2048 // Read buffer (must be an even number) | |
80 | #define W9966_SRAMSIZE 131072 // 128kb | |
81 | #define W9966_SRAMID 0x02 // check w9966cf.pdf | |
82 | ||
83 | // Empirically determined window limits | |
84 | #define W9966_WND_MIN_X 16 | |
85 | #define W9966_WND_MIN_Y 14 | |
86 | #define W9966_WND_MAX_X 705 | |
87 | #define W9966_WND_MAX_Y 253 | |
88 | #define W9966_WND_MAX_W (W9966_WND_MAX_X - W9966_WND_MIN_X) | |
89 | #define W9966_WND_MAX_H (W9966_WND_MAX_Y - W9966_WND_MIN_Y) | |
90 | ||
91 | // Keep track of our current state | |
92 | #define W9966_STATE_PDEV 0x01 | |
93 | #define W9966_STATE_CLAIMED 0x02 | |
94 | #define W9966_STATE_VDEV 0x04 | |
95 | ||
96 | #define W9966_I2C_W_ID 0x48 | |
97 | #define W9966_I2C_R_ID 0x49 | |
98 | #define W9966_I2C_R_DATA 0x08 | |
99 | #define W9966_I2C_R_CLOCK 0x04 | |
100 | #define W9966_I2C_W_DATA 0x02 | |
101 | #define W9966_I2C_W_CLOCK 0x01 | |
102 | ||
103 | struct w9966_dev { | |
104 | unsigned char dev_state; | |
105 | unsigned char i2c_state; | |
106 | unsigned short ppmode; | |
107 | struct parport* pport; | |
108 | struct pardevice* pdev; | |
109 | struct video_device vdev; | |
110 | unsigned short width; | |
111 | unsigned short height; | |
112 | unsigned char brightness; | |
113 | signed char contrast; | |
114 | signed char color; | |
115 | signed char hue; | |
7d43cd53 | 116 | unsigned long in_use; |
1da177e4 LT |
117 | }; |
118 | ||
119 | /* | |
120 | * Module specific properties | |
121 | */ | |
122 | ||
123 | MODULE_AUTHOR("Jakob Kemi <jakob.kemi@post.utfors.se>"); | |
124 | MODULE_DESCRIPTION("Winbond w9966cf WebCam driver (0.32)"); | |
125 | MODULE_LICENSE("GPL"); | |
126 | ||
127 | ||
128 | #ifdef MODULE | |
129 | static const char* pardev[] = {[0 ... W9966_MAXCAMS] = ""}; | |
130 | #else | |
131 | static const char* pardev[] = {[0 ... W9966_MAXCAMS] = "aggressive"}; | |
132 | #endif | |
133 | module_param_array(pardev, charp, NULL, 0); | |
134 | MODULE_PARM_DESC(pardev, "pardev: where to search for\n\ | |
135 | \teach camera. 'aggressive' means brute-force search.\n\ | |
136 | \tEg: >pardev=parport3,aggressive,parport2,parport1< would assign\n\ | |
137 | \tcam 1 to parport3 and search every parport for cam 2 etc..."); | |
138 | ||
ff699e6b | 139 | static int parmode; |
1da177e4 LT |
140 | module_param(parmode, int, 0); |
141 | MODULE_PARM_DESC(parmode, "parmode: transfer mode (0=auto, 1=ecp, 2=epp"); | |
142 | ||
143 | static int video_nr = -1; | |
144 | module_param(video_nr, int, 0); | |
145 | ||
146 | /* | |
147 | * Private data | |
148 | */ | |
149 | ||
150 | static struct w9966_dev w9966_cams[W9966_MAXCAMS]; | |
151 | ||
152 | /* | |
153 | * Private function declares | |
154 | */ | |
155 | ||
156 | static inline void w9966_setState(struct w9966_dev* cam, int mask, int val); | |
157 | static inline int w9966_getState(struct w9966_dev* cam, int mask, int val); | |
158 | static inline void w9966_pdev_claim(struct w9966_dev *vdev); | |
159 | static inline void w9966_pdev_release(struct w9966_dev *vdev); | |
160 | ||
161 | static int w9966_rReg(struct w9966_dev* cam, int reg); | |
162 | static int w9966_wReg(struct w9966_dev* cam, int reg, int data); | |
163 | #if 0 | |
164 | static int w9966_rReg_i2c(struct w9966_dev* cam, int reg); | |
165 | #endif | |
166 | static int w9966_wReg_i2c(struct w9966_dev* cam, int reg, int data); | |
167 | static int w9966_findlen(int near, int size, int maxlen); | |
168 | static int w9966_calcscale(int size, int min, int max, int* beg, int* end, unsigned char* factor); | |
169 | static int w9966_setup(struct w9966_dev* cam, int x1, int y1, int x2, int y2, int w, int h); | |
170 | ||
171 | static int w9966_init(struct w9966_dev* cam, struct parport* port); | |
172 | static void w9966_term(struct w9966_dev* cam); | |
173 | ||
174 | static inline void w9966_i2c_setsda(struct w9966_dev* cam, int state); | |
175 | static inline int w9966_i2c_setscl(struct w9966_dev* cam, int state); | |
176 | static inline int w9966_i2c_getsda(struct w9966_dev* cam); | |
177 | static inline int w9966_i2c_getscl(struct w9966_dev* cam); | |
178 | static int w9966_i2c_wbyte(struct w9966_dev* cam, int data); | |
179 | #if 0 | |
180 | static int w9966_i2c_rbyte(struct w9966_dev* cam); | |
181 | #endif | |
182 | ||
069b7479 | 183 | static long w9966_v4l_ioctl(struct file *file, |
1da177e4 LT |
184 | unsigned int cmd, unsigned long arg); |
185 | static ssize_t w9966_v4l_read(struct file *file, char __user *buf, | |
186 | size_t count, loff_t *ppos); | |
187 | ||
bec43661 | 188 | static int w9966_exclusive_open(struct file *file) |
7d43cd53 | 189 | { |
c170ecf4 | 190 | struct w9966_dev *cam = video_drvdata(file); |
7d43cd53 HV |
191 | |
192 | return test_and_set_bit(0, &cam->in_use) ? -EBUSY : 0; | |
193 | } | |
194 | ||
bec43661 | 195 | static int w9966_exclusive_release(struct file *file) |
7d43cd53 | 196 | { |
c170ecf4 | 197 | struct w9966_dev *cam = video_drvdata(file); |
7d43cd53 HV |
198 | |
199 | clear_bit(0, &cam->in_use); | |
200 | return 0; | |
201 | } | |
202 | ||
bec43661 | 203 | static const struct v4l2_file_operations w9966_fops = { |
1da177e4 | 204 | .owner = THIS_MODULE, |
7d43cd53 HV |
205 | .open = w9966_exclusive_open, |
206 | .release = w9966_exclusive_release, | |
1da177e4 LT |
207 | .ioctl = w9966_v4l_ioctl, |
208 | .read = w9966_v4l_read, | |
1da177e4 LT |
209 | }; |
210 | static struct video_device w9966_template = { | |
1da177e4 | 211 | .name = W9966_DRIVERNAME, |
1da177e4 | 212 | .fops = &w9966_fops, |
aa5e90af | 213 | .release = video_device_release_empty, |
1da177e4 LT |
214 | }; |
215 | ||
216 | /* | |
217 | * Private function defines | |
218 | */ | |
219 | ||
220 | ||
d56410e0 | 221 | // Set camera phase flags, so we know what to uninit when terminating |
1da177e4 LT |
222 | static inline void w9966_setState(struct w9966_dev* cam, int mask, int val) |
223 | { | |
224 | cam->dev_state = (cam->dev_state & ~mask) ^ val; | |
225 | } | |
226 | ||
227 | // Get camera phase flags | |
228 | static inline int w9966_getState(struct w9966_dev* cam, int mask, int val) | |
229 | { | |
230 | return ((cam->dev_state & mask) == val); | |
231 | } | |
232 | ||
233 | // Claim parport for ourself | |
234 | static inline void w9966_pdev_claim(struct w9966_dev* cam) | |
235 | { | |
236 | if (w9966_getState(cam, W9966_STATE_CLAIMED, W9966_STATE_CLAIMED)) | |
237 | return; | |
238 | parport_claim_or_block(cam->pdev); | |
239 | w9966_setState(cam, W9966_STATE_CLAIMED, W9966_STATE_CLAIMED); | |
240 | } | |
241 | ||
242 | // Release parport for others to use | |
243 | static inline void w9966_pdev_release(struct w9966_dev* cam) | |
244 | { | |
245 | if (w9966_getState(cam, W9966_STATE_CLAIMED, 0)) | |
246 | return; | |
247 | parport_release(cam->pdev); | |
248 | w9966_setState(cam, W9966_STATE_CLAIMED, 0); | |
249 | } | |
d56410e0 | 250 | |
1da177e4 LT |
251 | // Read register from W9966 interface-chip |
252 | // Expects a claimed pdev | |
253 | // -1 on error, else register data (byte) | |
254 | static int w9966_rReg(struct w9966_dev* cam, int reg) | |
255 | { | |
256 | // ECP, read, regtransfer, REG, REG, REG, REG, REG | |
257 | const unsigned char addr = 0x80 | (reg & 0x1f); | |
258 | unsigned char val; | |
d56410e0 | 259 | |
1da177e4 LT |
260 | if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_ADDR) != 0) |
261 | return -1; | |
262 | if (parport_write(cam->pport, &addr, 1) != 1) | |
263 | return -1; | |
264 | if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_DATA) != 0) | |
265 | return -1; | |
266 | if (parport_read(cam->pport, &val, 1) != 1) | |
267 | return -1; | |
268 | ||
269 | return val; | |
270 | } | |
271 | ||
272 | // Write register to W9966 interface-chip | |
273 | // Expects a claimed pdev | |
274 | // -1 on error | |
275 | static int w9966_wReg(struct w9966_dev* cam, int reg, int data) | |
276 | { | |
277 | // ECP, write, regtransfer, REG, REG, REG, REG, REG | |
278 | const unsigned char addr = 0xc0 | (reg & 0x1f); | |
279 | const unsigned char val = data; | |
d56410e0 | 280 | |
1da177e4 LT |
281 | if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_ADDR) != 0) |
282 | return -1; | |
283 | if (parport_write(cam->pport, &addr, 1) != 1) | |
284 | return -1; | |
285 | if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_DATA) != 0) | |
286 | return -1; | |
287 | if (parport_write(cam->pport, &val, 1) != 1) | |
288 | return -1; | |
289 | ||
290 | return 0; | |
291 | } | |
292 | ||
293 | // Initialize camera device. Setup all internal flags, set a | |
294 | // default video mode, setup ccd-chip, register v4l device etc.. | |
295 | // Also used for 'probing' of hardware. | |
296 | // -1 on error | |
297 | static int w9966_init(struct w9966_dev* cam, struct parport* port) | |
298 | { | |
299 | if (cam->dev_state != 0) | |
300 | return -1; | |
d56410e0 | 301 | |
1da177e4 LT |
302 | cam->pport = port; |
303 | cam->brightness = 128; | |
304 | cam->contrast = 64; | |
305 | cam->color = 64; | |
306 | cam->hue = 0; | |
307 | ||
308 | // Select requested transfer mode | |
309 | switch(parmode) | |
310 | { | |
311 | default: // Auto-detect (priority: hw-ecp, hw-epp, sw-ecp) | |
312 | case 0: | |
313 | if (port->modes & PARPORT_MODE_ECP) | |
314 | cam->ppmode = IEEE1284_MODE_ECP; | |
315 | else if (port->modes & PARPORT_MODE_EPP) | |
316 | cam->ppmode = IEEE1284_MODE_EPP; | |
317 | else | |
318 | cam->ppmode = IEEE1284_MODE_ECP; | |
d56410e0 | 319 | break; |
1da177e4 LT |
320 | case 1: // hw- or sw-ecp |
321 | cam->ppmode = IEEE1284_MODE_ECP; | |
322 | break; | |
323 | case 2: // hw- or sw-epp | |
324 | cam->ppmode = IEEE1284_MODE_EPP; | |
325 | break; | |
326 | } | |
d56410e0 | 327 | |
1da177e4 LT |
328 | // Tell the parport driver that we exists |
329 | cam->pdev = parport_register_device(port, "w9966", NULL, NULL, NULL, 0, NULL); | |
330 | if (cam->pdev == NULL) { | |
331 | DPRINTF("parport_register_device() failed\n"); | |
332 | return -1; | |
333 | } | |
334 | w9966_setState(cam, W9966_STATE_PDEV, W9966_STATE_PDEV); | |
335 | ||
336 | w9966_pdev_claim(cam); | |
d56410e0 | 337 | |
1da177e4 LT |
338 | // Setup a default capture mode |
339 | if (w9966_setup(cam, 0, 0, 1023, 1023, 200, 160) != 0) { | |
340 | DPRINTF("w9966_setup() failed.\n"); | |
341 | return -1; | |
342 | } | |
343 | ||
344 | w9966_pdev_release(cam); | |
345 | ||
346 | // Fill in the video_device struct and register us to v4l | |
347 | memcpy(&cam->vdev, &w9966_template, sizeof(struct video_device)); | |
601e9444 | 348 | video_set_drvdata(&cam->vdev, cam); |
1da177e4 | 349 | |
dc60de33 | 350 | if (video_register_device(&cam->vdev, VFL_TYPE_GRABBER, video_nr) < 0) |
1da177e4 | 351 | return -1; |
d56410e0 | 352 | |
1da177e4 | 353 | w9966_setState(cam, W9966_STATE_VDEV, W9966_STATE_VDEV); |
d56410e0 | 354 | |
1da177e4 LT |
355 | // All ok |
356 | printk( | |
357 | "w9966cf: Found and initialized a webcam on %s.\n", | |
358 | cam->pport->name | |
359 | ); | |
360 | return 0; | |
361 | } | |
362 | ||
363 | ||
364 | // Terminate everything gracefully | |
365 | static void w9966_term(struct w9966_dev* cam) | |
366 | { | |
367 | // Unregister from v4l | |
368 | if (w9966_getState(cam, W9966_STATE_VDEV, W9966_STATE_VDEV)) { | |
369 | video_unregister_device(&cam->vdev); | |
370 | w9966_setState(cam, W9966_STATE_VDEV, 0); | |
371 | } | |
372 | ||
373 | // Terminate from IEEE1284 mode and release pdev block | |
374 | if (w9966_getState(cam, W9966_STATE_PDEV, W9966_STATE_PDEV)) { | |
375 | w9966_pdev_claim(cam); | |
376 | parport_negotiate(cam->pport, IEEE1284_MODE_COMPAT); | |
377 | w9966_pdev_release(cam); | |
378 | } | |
379 | ||
380 | // Unregister from parport | |
381 | if (w9966_getState(cam, W9966_STATE_PDEV, W9966_STATE_PDEV)) { | |
382 | parport_unregister_device(cam->pdev); | |
383 | w9966_setState(cam, W9966_STATE_PDEV, 0); | |
384 | } | |
385 | } | |
386 | ||
387 | ||
388 | // Find a good length for capture window (used both for W and H) | |
389 | // A bit ugly but pretty functional. The capture length | |
390 | // have to match the downscale | |
391 | static int w9966_findlen(int near, int size, int maxlen) | |
392 | { | |
393 | int bestlen = size; | |
394 | int besterr = abs(near - bestlen); | |
395 | int len; | |
396 | ||
397 | for(len = size+1;len < maxlen;len++) | |
398 | { | |
399 | int err; | |
400 | if ( ((64*size) %len) != 0) | |
401 | continue; | |
402 | ||
403 | err = abs(near - len); | |
404 | ||
405 | // Only continue as long as we keep getting better values | |
406 | if (err > besterr) | |
407 | break; | |
d56410e0 | 408 | |
1da177e4 LT |
409 | besterr = err; |
410 | bestlen = len; | |
411 | } | |
412 | ||
413 | return bestlen; | |
414 | } | |
415 | ||
d56410e0 | 416 | // Modify capture window (if necessary) |
1da177e4 LT |
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) | |
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 LT |
425 | |
426 | // Check for bad format | |
427 | if (newlen > maxlen || newlen < size) | |
428 | return -1; | |
429 | ||
430 | // Set factor (6 bit fixed) | |
431 | *factor = (64*size) / newlen; | |
432 | if (*factor == 64) | |
433 | *factor = 0x00; // downscale is disabled | |
434 | else | |
435 | *factor |= 0x80; // set downscale-enable bit | |
436 | ||
437 | // Modify old beginning and end | |
438 | *beg -= err / 2; | |
439 | *end += err - (err / 2); | |
440 | ||
441 | // Move window if outside borders | |
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 | ||
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) | |
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 | ||
1da177e4 LT |
471 | if (w*h*2 > W9966_SRAMSIZE) |
472 | { | |
473 | DPRINTF("capture window exceeds SRAM size!.\n"); | |
474 | w = 200; h = 160; // Pick default values | |
475 | } | |
476 | ||
477 | w &= ~0x1; | |
478 | if (w < 2) w = 2; | |
479 | if (h < 1) h = 1; | |
480 | if (w > W9966_WND_MAX_W) w = W9966_WND_MAX_W; | |
481 | if (h > W9966_WND_MAX_H) h = W9966_WND_MAX_H; | |
482 | ||
483 | cam->width = w; | |
484 | cam->height = h; | |
485 | ||
d56410e0 | 486 | enh_s = 0; |
1da177e4 | 487 | enh_e = w*h*2; |
d56410e0 | 488 | |
1da177e4 LT |
489 | // Modify capture window if necessary and calculate downscaling |
490 | if ( | |
491 | w9966_calcscale(w, W9966_WND_MIN_X, W9966_WND_MAX_X, &x1, &x2, &scale_x) != 0 || | |
492 | w9966_calcscale(h, W9966_WND_MIN_Y, W9966_WND_MAX_Y, &y1, &y2, &scale_y) != 0 | |
493 | ) return -1; | |
494 | ||
495 | DPRINTF( | |
496 | "%dx%d, x: %d<->%d, y: %d<->%d, sx: %d/64, sy: %d/64.\n", | |
497 | w, h, x1, x2, y1, y2, scale_x&~0x80, scale_y&~0x80 | |
498 | ); | |
d56410e0 | 499 | |
1da177e4 LT |
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 | |
d56410e0 MCC |
505 | |
506 | // Capture window | |
1da177e4 LT |
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) | |
d56410e0 | 516 | |
1da177e4 LT |
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; // ??? | |
d56410e0 | 532 | |
1da177e4 LT |
533 | // SAA7111 chip settings |
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 | ||
539 | // Reset (ECP-fifo & serial-bus) | |
540 | if (w9966_wReg(cam, 0x00, 0x03) == -1) | |
541 | return -1; | |
542 | ||
543 | // Write regs to w9966cf chip | |
544 | for (i = 0; i < 0x1c; i++) | |
545 | if (w9966_wReg(cam, i, regs[i]) == -1) | |
546 | return -1; | |
547 | ||
548 | // Write regs to saa7111 chip | |
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 | /* | |
557 | * Ugly and primitive i2c protocol functions | |
558 | */ | |
559 | ||
560 | // Sets the data line on the i2c bus. | |
561 | // Expects a claimed pdev. | |
562 | static inline void w9966_i2c_setsda(struct w9966_dev* cam, int state) | |
563 | { | |
564 | if (state) | |
565 | cam->i2c_state |= W9966_I2C_W_DATA; | |
566 | else | |
567 | cam->i2c_state &= ~W9966_I2C_W_DATA; | |
d56410e0 | 568 | |
1da177e4 LT |
569 | w9966_wReg(cam, 0x18, cam->i2c_state); |
570 | udelay(5); | |
571 | } | |
572 | ||
573 | // Get peripheral clock line | |
574 | // Expects a claimed pdev. | |
575 | static inline int w9966_i2c_getscl(struct w9966_dev* cam) | |
576 | { | |
577 | const unsigned char state = w9966_rReg(cam, 0x18); | |
578 | return ((state & W9966_I2C_R_CLOCK) > 0); | |
579 | } | |
580 | ||
581 | // Sets the clock line on the i2c bus. | |
582 | // Expects a claimed pdev. -1 on error | |
583 | static inline int w9966_i2c_setscl(struct w9966_dev* cam, int state) | |
584 | { | |
585 | unsigned long timeout; | |
586 | ||
587 | if (state) | |
588 | cam->i2c_state |= W9966_I2C_W_CLOCK; | |
589 | else | |
590 | cam->i2c_state &= ~W9966_I2C_W_CLOCK; | |
591 | ||
592 | w9966_wReg(cam, 0x18, cam->i2c_state); | |
593 | udelay(5); | |
d56410e0 | 594 | |
1da177e4 LT |
595 | // we go to high, we also expect the peripheral to ack. |
596 | if (state) { | |
597 | timeout = jiffies + 100; | |
598 | while (!w9966_i2c_getscl(cam)) { | |
599 | if (time_after(jiffies, timeout)) | |
600 | return -1; | |
601 | } | |
602 | } | |
603 | return 0; | |
604 | } | |
605 | ||
606 | // Get peripheral data line | |
607 | // Expects a claimed pdev. | |
608 | static inline int w9966_i2c_getsda(struct w9966_dev* cam) | |
609 | { | |
610 | const unsigned char state = w9966_rReg(cam, 0x18); | |
611 | return ((state & W9966_I2C_R_DATA) > 0); | |
612 | } | |
613 | ||
614 | // Write a byte with ack to the i2c bus. | |
615 | // Expects a claimed pdev. -1 on error | |
616 | static int w9966_i2c_wbyte(struct w9966_dev* cam, int data) | |
617 | { | |
618 | int i; | |
619 | for (i = 7; i >= 0; i--) | |
620 | { | |
621 | w9966_i2c_setsda(cam, (data >> i) & 0x01); | |
622 | ||
623 | if (w9966_i2c_setscl(cam, 1) == -1) | |
d56410e0 | 624 | return -1; |
1da177e4 LT |
625 | w9966_i2c_setscl(cam, 0); |
626 | } | |
627 | ||
628 | w9966_i2c_setsda(cam, 1); | |
d56410e0 | 629 | |
1da177e4 LT |
630 | if (w9966_i2c_setscl(cam, 1) == -1) |
631 | return -1; | |
632 | w9966_i2c_setscl(cam, 0); | |
d56410e0 | 633 | |
1da177e4 LT |
634 | return 0; |
635 | } | |
636 | ||
637 | // Read a data byte with ack from the i2c-bus | |
638 | // Expects a claimed pdev. -1 on error | |
639 | #if 0 | |
640 | static int w9966_i2c_rbyte(struct w9966_dev* cam) | |
641 | { | |
642 | unsigned char data = 0x00; | |
d56410e0 MCC |
643 | int i; |
644 | ||
1da177e4 LT |
645 | w9966_i2c_setsda(cam, 1); |
646 | ||
647 | for (i = 0; i < 8; i++) | |
648 | { | |
649 | if (w9966_i2c_setscl(cam, 1) == -1) | |
650 | return -1; | |
651 | data = data << 1; | |
652 | if (w9966_i2c_getsda(cam)) | |
653 | data |= 0x01; | |
d56410e0 | 654 | |
1da177e4 LT |
655 | w9966_i2c_setscl(cam, 0); |
656 | } | |
657 | return data; | |
658 | } | |
659 | #endif | |
660 | ||
661 | // Read a register from the i2c device. | |
662 | // Expects claimed pdev. -1 on error | |
663 | #if 0 | |
664 | static int w9966_rReg_i2c(struct w9966_dev* cam, int reg) | |
665 | { | |
666 | int data; | |
667 | ||
668 | w9966_i2c_setsda(cam, 0); | |
669 | w9966_i2c_setscl(cam, 0); | |
670 | ||
671 | if ( | |
672 | w9966_i2c_wbyte(cam, W9966_I2C_W_ID) == -1 || | |
673 | w9966_i2c_wbyte(cam, reg) == -1 | |
674 | ) | |
675 | return -1; | |
676 | ||
677 | w9966_i2c_setsda(cam, 1); | |
678 | if (w9966_i2c_setscl(cam, 1) == -1) | |
679 | return -1; | |
680 | w9966_i2c_setsda(cam, 0); | |
681 | w9966_i2c_setscl(cam, 0); | |
682 | ||
683 | if ( | |
684 | w9966_i2c_wbyte(cam, W9966_I2C_R_ID) == -1 || | |
685 | (data = w9966_i2c_rbyte(cam)) == -1 | |
686 | ) | |
687 | return -1; | |
688 | ||
689 | w9966_i2c_setsda(cam, 0); | |
d56410e0 | 690 | |
1da177e4 LT |
691 | if (w9966_i2c_setscl(cam, 1) == -1) |
692 | return -1; | |
693 | w9966_i2c_setsda(cam, 1); | |
d56410e0 | 694 | |
1da177e4 LT |
695 | return data; |
696 | } | |
697 | #endif | |
698 | ||
699 | // Write a register to the i2c device. | |
700 | // Expects claimed pdev. -1 on error | |
701 | static int w9966_wReg_i2c(struct w9966_dev* cam, int reg, int data) | |
702 | { | |
703 | w9966_i2c_setsda(cam, 0); | |
704 | w9966_i2c_setscl(cam, 0); | |
705 | ||
706 | if ( | |
707 | w9966_i2c_wbyte(cam, W9966_I2C_W_ID) == -1 || | |
708 | w9966_i2c_wbyte(cam, reg) == -1 || | |
709 | w9966_i2c_wbyte(cam, data) == -1 | |
710 | ) | |
711 | return -1; | |
712 | ||
713 | w9966_i2c_setsda(cam, 0); | |
714 | if (w9966_i2c_setscl(cam, 1) == -1) | |
715 | return -1; | |
d56410e0 | 716 | |
1da177e4 LT |
717 | w9966_i2c_setsda(cam, 1); |
718 | ||
719 | return 0; | |
720 | } | |
721 | ||
722 | /* | |
723 | * Video4linux interfacing | |
724 | */ | |
725 | ||
069b7479 | 726 | static long w9966_v4l_do_ioctl(struct file *file, unsigned int cmd, void *arg) |
1da177e4 | 727 | { |
c170ecf4 | 728 | struct w9966_dev *cam = video_drvdata(file); |
d56410e0 | 729 | |
1da177e4 LT |
730 | switch(cmd) |
731 | { | |
732 | case VIDIOCGCAP: | |
733 | { | |
734 | static struct video_capability vcap = { | |
735 | .name = W9966_DRIVERNAME, | |
736 | .type = VID_TYPE_CAPTURE | VID_TYPE_SCALES, | |
737 | .channels = 1, | |
738 | .maxwidth = W9966_WND_MAX_W, | |
739 | .maxheight = W9966_WND_MAX_H, | |
740 | .minwidth = 2, | |
741 | .minheight = 1, | |
742 | }; | |
743 | struct video_capability *cap = arg; | |
744 | *cap = vcap; | |
745 | return 0; | |
746 | } | |
747 | case VIDIOCGCHAN: | |
748 | { | |
749 | struct video_channel *vch = arg; | |
750 | if(vch->channel != 0) // We only support one channel (#0) | |
751 | return -EINVAL; | |
752 | memset(vch,0,sizeof(*vch)); | |
753 | strcpy(vch->name, "CCD-input"); | |
754 | vch->type = VIDEO_TYPE_CAMERA; | |
755 | return 0; | |
756 | } | |
757 | case VIDIOCSCHAN: | |
758 | { | |
759 | struct video_channel *vch = arg; | |
760 | if(vch->channel != 0) | |
761 | return -EINVAL; | |
762 | return 0; | |
763 | } | |
764 | case VIDIOCGTUNER: | |
765 | { | |
766 | struct video_tuner *vtune = arg; | |
767 | if(vtune->tuner != 0) | |
768 | return -EINVAL; | |
769 | strcpy(vtune->name, "no tuner"); | |
770 | vtune->rangelow = 0; | |
771 | vtune->rangehigh = 0; | |
772 | vtune->flags = VIDEO_TUNER_NORM; | |
773 | vtune->mode = VIDEO_MODE_AUTO; | |
774 | vtune->signal = 0xffff; | |
775 | return 0; | |
776 | } | |
777 | case VIDIOCSTUNER: | |
778 | { | |
779 | struct video_tuner *vtune = arg; | |
780 | if (vtune->tuner != 0) | |
781 | return -EINVAL; | |
782 | if (vtune->mode != VIDEO_MODE_AUTO) | |
783 | return -EINVAL; | |
784 | return 0; | |
785 | } | |
786 | case VIDIOCGPICT: | |
787 | { | |
788 | struct video_picture vpic = { | |
789 | cam->brightness << 8, // brightness | |
790 | (cam->hue + 128) << 8, // hue | |
791 | cam->color << 9, // color | |
792 | cam->contrast << 9, // contrast | |
793 | 0x8000, // whiteness | |
794 | 16, VIDEO_PALETTE_YUV422// bpp, palette format | |
795 | }; | |
796 | struct video_picture *pic = arg; | |
797 | *pic = vpic; | |
798 | return 0; | |
799 | } | |
800 | case VIDIOCSPICT: | |
801 | { | |
802 | struct video_picture *vpic = arg; | |
2485eb0a | 803 | if (vpic->depth != 16 || (vpic->palette != VIDEO_PALETTE_YUV422 && vpic->palette != VIDEO_PALETTE_YUYV)) |
1da177e4 | 804 | return -EINVAL; |
d56410e0 | 805 | |
1da177e4 LT |
806 | cam->brightness = vpic->brightness >> 8; |
807 | cam->hue = (vpic->hue >> 8) - 128; | |
808 | cam->color = vpic->colour >> 9; | |
809 | cam->contrast = vpic->contrast >> 9; | |
810 | ||
811 | w9966_pdev_claim(cam); | |
d56410e0 | 812 | |
1da177e4 LT |
813 | if ( |
814 | w9966_wReg_i2c(cam, 0x0a, cam->brightness) == -1 || | |
815 | w9966_wReg_i2c(cam, 0x0b, cam->contrast) == -1 || | |
816 | w9966_wReg_i2c(cam, 0x0c, cam->color) == -1 || | |
817 | w9966_wReg_i2c(cam, 0x0d, cam->hue) == -1 | |
818 | ) { | |
819 | w9966_pdev_release(cam); | |
820 | return -EIO; | |
821 | } | |
d56410e0 | 822 | |
1da177e4 LT |
823 | w9966_pdev_release(cam); |
824 | return 0; | |
825 | } | |
826 | case VIDIOCSWIN: | |
827 | { | |
828 | int ret; | |
829 | struct video_window *vwin = arg; | |
d56410e0 | 830 | |
1da177e4 LT |
831 | if (vwin->flags != 0) |
832 | return -EINVAL; | |
833 | if (vwin->clipcount != 0) | |
834 | return -EINVAL; | |
835 | if (vwin->width < 2 || vwin->width > W9966_WND_MAX_W) | |
d56410e0 | 836 | return -EINVAL; |
1da177e4 LT |
837 | if (vwin->height < 1 || vwin->height > W9966_WND_MAX_H) |
838 | return -EINVAL; | |
839 | ||
840 | // Update camera regs | |
841 | w9966_pdev_claim(cam); | |
842 | ret = w9966_setup(cam, 0, 0, 1023, 1023, vwin->width, vwin->height); | |
843 | w9966_pdev_release(cam); | |
d56410e0 | 844 | |
1da177e4 LT |
845 | if (ret != 0) { |
846 | DPRINTF("VIDIOCSWIN: w9966_setup() failed.\n"); | |
847 | return -EIO; | |
848 | } | |
d56410e0 | 849 | |
1da177e4 LT |
850 | return 0; |
851 | } | |
852 | case VIDIOCGWIN: | |
853 | { | |
854 | struct video_window *vwin = arg; | |
855 | memset(vwin, 0, sizeof(*vwin)); | |
856 | vwin->width = cam->width; | |
857 | vwin->height = cam->height; | |
858 | return 0; | |
859 | } | |
860 | // Unimplemented | |
d56410e0 | 861 | case VIDIOCCAPTURE: |
1da177e4 LT |
862 | case VIDIOCGFBUF: |
863 | case VIDIOCSFBUF: | |
864 | case VIDIOCKEY: | |
865 | case VIDIOCGFREQ: | |
866 | case VIDIOCSFREQ: | |
867 | case VIDIOCGAUDIO: | |
868 | case VIDIOCSAUDIO: | |
869 | return -EINVAL; | |
870 | default: | |
871 | return -ENOIOCTLCMD; | |
872 | } | |
873 | return 0; | |
874 | } | |
875 | ||
069b7479 | 876 | static long w9966_v4l_ioctl(struct file *file, |
1da177e4 LT |
877 | unsigned int cmd, unsigned long arg) |
878 | { | |
f473bf76 | 879 | return video_usercopy(file, cmd, arg, w9966_v4l_do_ioctl); |
1da177e4 LT |
880 | } |
881 | ||
882 | // Capture data | |
883 | static ssize_t w9966_v4l_read(struct file *file, char __user *buf, | |
884 | size_t count, loff_t *ppos) | |
885 | { | |
c170ecf4 | 886 | struct w9966_dev *cam = video_drvdata(file); |
1da177e4 LT |
887 | unsigned char addr = 0xa0; // ECP, read, CCD-transfer, 00000 |
888 | unsigned char __user *dest = (unsigned char __user *)buf; | |
889 | unsigned long dleft = count; | |
890 | unsigned char *tbuf; | |
d56410e0 | 891 | |
1da177e4 LT |
892 | // Why would anyone want more than this?? |
893 | if (count > cam->width * cam->height * 2) | |
894 | return -EINVAL; | |
d56410e0 | 895 | |
1da177e4 LT |
896 | w9966_pdev_claim(cam); |
897 | w9966_wReg(cam, 0x00, 0x02); // Reset ECP-FIFO buffer | |
898 | w9966_wReg(cam, 0x00, 0x00); // Return to normal operation | |
899 | w9966_wReg(cam, 0x01, 0x98); // Enable capture | |
900 | ||
d56410e0 | 901 | // write special capture-addr and negotiate into data transfer |
1da177e4 LT |
902 | if ( |
903 | (parport_negotiate(cam->pport, cam->ppmode|IEEE1284_ADDR) != 0 )|| | |
904 | (parport_write(cam->pport, &addr, 1) != 1 )|| | |
905 | (parport_negotiate(cam->pport, cam->ppmode|IEEE1284_DATA) != 0 ) | |
906 | ) { | |
907 | w9966_pdev_release(cam); | |
908 | return -EFAULT; | |
909 | } | |
910 | ||
911 | tbuf = kmalloc(W9966_RBUFFER, GFP_KERNEL); | |
912 | if (tbuf == NULL) { | |
913 | count = -ENOMEM; | |
914 | goto out; | |
915 | } | |
916 | ||
917 | while(dleft > 0) | |
918 | { | |
919 | unsigned long tsize = (dleft > W9966_RBUFFER) ? W9966_RBUFFER : dleft; | |
d56410e0 | 920 | |
1da177e4 LT |
921 | if (parport_read(cam->pport, tbuf, tsize) < tsize) { |
922 | count = -EFAULT; | |
923 | goto out; | |
924 | } | |
925 | if (copy_to_user(dest, tbuf, tsize) != 0) { | |
926 | count = -EFAULT; | |
927 | goto out; | |
928 | } | |
929 | dest += tsize; | |
930 | dleft -= tsize; | |
931 | } | |
932 | ||
933 | w9966_wReg(cam, 0x01, 0x18); // Disable capture | |
934 | ||
935 | out: | |
936 | kfree(tbuf); | |
937 | w9966_pdev_release(cam); | |
938 | ||
939 | return count; | |
940 | } | |
941 | ||
942 | ||
943 | // Called once for every parport on init | |
944 | static void w9966_attach(struct parport *port) | |
945 | { | |
946 | int i; | |
d56410e0 | 947 | |
1da177e4 LT |
948 | for (i = 0; i < W9966_MAXCAMS; i++) |
949 | { | |
950 | if (w9966_cams[i].dev_state != 0) // Cam is already assigned | |
951 | continue; | |
952 | if ( | |
953 | strcmp(pardev[i], "aggressive") == 0 || | |
954 | strcmp(pardev[i], port->name) == 0 | |
955 | ) { | |
956 | if (w9966_init(&w9966_cams[i], port) != 0) | |
957 | w9966_term(&w9966_cams[i]); | |
958 | break; // return | |
959 | } | |
960 | } | |
961 | } | |
962 | ||
963 | // Called once for every parport on termination | |
964 | static void w9966_detach(struct parport *port) | |
965 | { | |
966 | int i; | |
967 | for (i = 0; i < W9966_MAXCAMS; i++) | |
968 | if (w9966_cams[i].dev_state != 0 && w9966_cams[i].pport == port) | |
969 | w9966_term(&w9966_cams[i]); | |
970 | } | |
971 | ||
972 | ||
973 | static struct parport_driver w9966_ppd = { | |
974 | .name = W9966_DRIVERNAME, | |
975 | .attach = w9966_attach, | |
976 | .detach = w9966_detach, | |
977 | }; | |
978 | ||
979 | // Module entry point | |
980 | static int __init w9966_mod_init(void) | |
981 | { | |
982 | int i; | |
983 | for (i = 0; i < W9966_MAXCAMS; i++) | |
984 | w9966_cams[i].dev_state = 0; | |
985 | ||
986 | return parport_register_driver(&w9966_ppd); | |
987 | } | |
988 | ||
989 | // Module cleanup | |
990 | static void __exit w9966_mod_term(void) | |
991 | { | |
992 | parport_unregister_driver(&w9966_ppd); | |
993 | } | |
994 | ||
995 | module_init(w9966_mod_init); | |
996 | module_exit(w9966_mod_term); |