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> | |
60 | #include <linux/videodev.h> | |
61 | #include <linux/parport.h> | |
62 | ||
63 | //#define DEBUG // Undef me for production | |
64 | ||
65 | #ifdef DEBUG | |
66 | #define DPRINTF(x, a...) printk(KERN_DEBUG "W9966: %s(): "x, __FUNCTION__ , ##a) | |
67 | #else | |
68 | #define DPRINTF(x...) | |
69 | #endif | |
70 | ||
71 | /* | |
72 | * Defines, simple typedefs etc. | |
73 | */ | |
74 | ||
75 | #define W9966_DRIVERNAME "W9966CF Webcam" | |
76 | #define W9966_MAXCAMS 4 // Maximum number of cameras | |
77 | #define W9966_RBUFFER 2048 // Read buffer (must be an even number) | |
78 | #define W9966_SRAMSIZE 131072 // 128kb | |
79 | #define W9966_SRAMID 0x02 // check w9966cf.pdf | |
80 | ||
81 | // Empirically determined window limits | |
82 | #define W9966_WND_MIN_X 16 | |
83 | #define W9966_WND_MIN_Y 14 | |
84 | #define W9966_WND_MAX_X 705 | |
85 | #define W9966_WND_MAX_Y 253 | |
86 | #define W9966_WND_MAX_W (W9966_WND_MAX_X - W9966_WND_MIN_X) | |
87 | #define W9966_WND_MAX_H (W9966_WND_MAX_Y - W9966_WND_MIN_Y) | |
88 | ||
89 | // Keep track of our current state | |
90 | #define W9966_STATE_PDEV 0x01 | |
91 | #define W9966_STATE_CLAIMED 0x02 | |
92 | #define W9966_STATE_VDEV 0x04 | |
93 | ||
94 | #define W9966_I2C_W_ID 0x48 | |
95 | #define W9966_I2C_R_ID 0x49 | |
96 | #define W9966_I2C_R_DATA 0x08 | |
97 | #define W9966_I2C_R_CLOCK 0x04 | |
98 | #define W9966_I2C_W_DATA 0x02 | |
99 | #define W9966_I2C_W_CLOCK 0x01 | |
100 | ||
101 | struct w9966_dev { | |
102 | unsigned char dev_state; | |
103 | unsigned char i2c_state; | |
104 | unsigned short ppmode; | |
105 | struct parport* pport; | |
106 | struct pardevice* pdev; | |
107 | struct video_device vdev; | |
108 | unsigned short width; | |
109 | unsigned short height; | |
110 | unsigned char brightness; | |
111 | signed char contrast; | |
112 | signed char color; | |
113 | signed char hue; | |
114 | }; | |
115 | ||
116 | /* | |
117 | * Module specific properties | |
118 | */ | |
119 | ||
120 | MODULE_AUTHOR("Jakob Kemi <jakob.kemi@post.utfors.se>"); | |
121 | MODULE_DESCRIPTION("Winbond w9966cf WebCam driver (0.32)"); | |
122 | MODULE_LICENSE("GPL"); | |
123 | ||
124 | ||
125 | #ifdef MODULE | |
126 | static const char* pardev[] = {[0 ... W9966_MAXCAMS] = ""}; | |
127 | #else | |
128 | static const char* pardev[] = {[0 ... W9966_MAXCAMS] = "aggressive"}; | |
129 | #endif | |
130 | module_param_array(pardev, charp, NULL, 0); | |
131 | MODULE_PARM_DESC(pardev, "pardev: where to search for\n\ | |
132 | \teach camera. 'aggressive' means brute-force search.\n\ | |
133 | \tEg: >pardev=parport3,aggressive,parport2,parport1< would assign\n\ | |
134 | \tcam 1 to parport3 and search every parport for cam 2 etc..."); | |
135 | ||
136 | static int parmode = 0; | |
137 | module_param(parmode, int, 0); | |
138 | MODULE_PARM_DESC(parmode, "parmode: transfer mode (0=auto, 1=ecp, 2=epp"); | |
139 | ||
140 | static int video_nr = -1; | |
141 | module_param(video_nr, int, 0); | |
142 | ||
143 | /* | |
144 | * Private data | |
145 | */ | |
146 | ||
147 | static struct w9966_dev w9966_cams[W9966_MAXCAMS]; | |
148 | ||
149 | /* | |
150 | * Private function declares | |
151 | */ | |
152 | ||
153 | static inline void w9966_setState(struct w9966_dev* cam, int mask, int val); | |
154 | static inline int w9966_getState(struct w9966_dev* cam, int mask, int val); | |
155 | static inline void w9966_pdev_claim(struct w9966_dev *vdev); | |
156 | static inline void w9966_pdev_release(struct w9966_dev *vdev); | |
157 | ||
158 | static int w9966_rReg(struct w9966_dev* cam, int reg); | |
159 | static int w9966_wReg(struct w9966_dev* cam, int reg, int data); | |
160 | #if 0 | |
161 | static int w9966_rReg_i2c(struct w9966_dev* cam, int reg); | |
162 | #endif | |
163 | static int w9966_wReg_i2c(struct w9966_dev* cam, int reg, int data); | |
164 | static int w9966_findlen(int near, int size, int maxlen); | |
165 | static int w9966_calcscale(int size, int min, int max, int* beg, int* end, unsigned char* factor); | |
166 | static int w9966_setup(struct w9966_dev* cam, int x1, int y1, int x2, int y2, int w, int h); | |
167 | ||
168 | static int w9966_init(struct w9966_dev* cam, struct parport* port); | |
169 | static void w9966_term(struct w9966_dev* cam); | |
170 | ||
171 | static inline void w9966_i2c_setsda(struct w9966_dev* cam, int state); | |
172 | static inline int w9966_i2c_setscl(struct w9966_dev* cam, int state); | |
173 | static inline int w9966_i2c_getsda(struct w9966_dev* cam); | |
174 | static inline int w9966_i2c_getscl(struct w9966_dev* cam); | |
175 | static int w9966_i2c_wbyte(struct w9966_dev* cam, int data); | |
176 | #if 0 | |
177 | static int w9966_i2c_rbyte(struct w9966_dev* cam); | |
178 | #endif | |
179 | ||
180 | static int w9966_v4l_ioctl(struct inode *inode, struct file *file, | |
181 | unsigned int cmd, unsigned long arg); | |
182 | static ssize_t w9966_v4l_read(struct file *file, char __user *buf, | |
183 | size_t count, loff_t *ppos); | |
184 | ||
185 | static struct file_operations w9966_fops = { | |
186 | .owner = THIS_MODULE, | |
187 | .open = video_exclusive_open, | |
188 | .release = video_exclusive_release, | |
189 | .ioctl = w9966_v4l_ioctl, | |
0d0fbf81 | 190 | .compat_ioctl = v4l_compat_ioctl32, |
1da177e4 LT |
191 | .read = w9966_v4l_read, |
192 | .llseek = no_llseek, | |
193 | }; | |
194 | static struct video_device w9966_template = { | |
195 | .owner = THIS_MODULE, | |
196 | .name = W9966_DRIVERNAME, | |
197 | .type = VID_TYPE_CAPTURE | VID_TYPE_SCALES, | |
198 | .hardware = VID_HARDWARE_W9966, | |
199 | .fops = &w9966_fops, | |
200 | }; | |
201 | ||
202 | /* | |
203 | * Private function defines | |
204 | */ | |
205 | ||
206 | ||
d56410e0 | 207 | // Set camera phase flags, so we know what to uninit when terminating |
1da177e4 LT |
208 | static inline void w9966_setState(struct w9966_dev* cam, int mask, int val) |
209 | { | |
210 | cam->dev_state = (cam->dev_state & ~mask) ^ val; | |
211 | } | |
212 | ||
213 | // Get camera phase flags | |
214 | static inline int w9966_getState(struct w9966_dev* cam, int mask, int val) | |
215 | { | |
216 | return ((cam->dev_state & mask) == val); | |
217 | } | |
218 | ||
219 | // Claim parport for ourself | |
220 | static inline void w9966_pdev_claim(struct w9966_dev* cam) | |
221 | { | |
222 | if (w9966_getState(cam, W9966_STATE_CLAIMED, W9966_STATE_CLAIMED)) | |
223 | return; | |
224 | parport_claim_or_block(cam->pdev); | |
225 | w9966_setState(cam, W9966_STATE_CLAIMED, W9966_STATE_CLAIMED); | |
226 | } | |
227 | ||
228 | // Release parport for others to use | |
229 | static inline void w9966_pdev_release(struct w9966_dev* cam) | |
230 | { | |
231 | if (w9966_getState(cam, W9966_STATE_CLAIMED, 0)) | |
232 | return; | |
233 | parport_release(cam->pdev); | |
234 | w9966_setState(cam, W9966_STATE_CLAIMED, 0); | |
235 | } | |
d56410e0 | 236 | |
1da177e4 LT |
237 | // Read register from W9966 interface-chip |
238 | // Expects a claimed pdev | |
239 | // -1 on error, else register data (byte) | |
240 | static int w9966_rReg(struct w9966_dev* cam, int reg) | |
241 | { | |
242 | // ECP, read, regtransfer, REG, REG, REG, REG, REG | |
243 | const unsigned char addr = 0x80 | (reg & 0x1f); | |
244 | unsigned char val; | |
d56410e0 | 245 | |
1da177e4 LT |
246 | if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_ADDR) != 0) |
247 | return -1; | |
248 | if (parport_write(cam->pport, &addr, 1) != 1) | |
249 | return -1; | |
250 | if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_DATA) != 0) | |
251 | return -1; | |
252 | if (parport_read(cam->pport, &val, 1) != 1) | |
253 | return -1; | |
254 | ||
255 | return val; | |
256 | } | |
257 | ||
258 | // Write register to W9966 interface-chip | |
259 | // Expects a claimed pdev | |
260 | // -1 on error | |
261 | static int w9966_wReg(struct w9966_dev* cam, int reg, int data) | |
262 | { | |
263 | // ECP, write, regtransfer, REG, REG, REG, REG, REG | |
264 | const unsigned char addr = 0xc0 | (reg & 0x1f); | |
265 | const unsigned char val = data; | |
d56410e0 | 266 | |
1da177e4 LT |
267 | if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_ADDR) != 0) |
268 | return -1; | |
269 | if (parport_write(cam->pport, &addr, 1) != 1) | |
270 | return -1; | |
271 | if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_DATA) != 0) | |
272 | return -1; | |
273 | if (parport_write(cam->pport, &val, 1) != 1) | |
274 | return -1; | |
275 | ||
276 | return 0; | |
277 | } | |
278 | ||
279 | // Initialize camera device. Setup all internal flags, set a | |
280 | // default video mode, setup ccd-chip, register v4l device etc.. | |
281 | // Also used for 'probing' of hardware. | |
282 | // -1 on error | |
283 | static int w9966_init(struct w9966_dev* cam, struct parport* port) | |
284 | { | |
285 | if (cam->dev_state != 0) | |
286 | return -1; | |
d56410e0 | 287 | |
1da177e4 LT |
288 | cam->pport = port; |
289 | cam->brightness = 128; | |
290 | cam->contrast = 64; | |
291 | cam->color = 64; | |
292 | cam->hue = 0; | |
293 | ||
294 | // Select requested transfer mode | |
295 | switch(parmode) | |
296 | { | |
297 | default: // Auto-detect (priority: hw-ecp, hw-epp, sw-ecp) | |
298 | case 0: | |
299 | if (port->modes & PARPORT_MODE_ECP) | |
300 | cam->ppmode = IEEE1284_MODE_ECP; | |
301 | else if (port->modes & PARPORT_MODE_EPP) | |
302 | cam->ppmode = IEEE1284_MODE_EPP; | |
303 | else | |
304 | cam->ppmode = IEEE1284_MODE_ECP; | |
d56410e0 | 305 | break; |
1da177e4 LT |
306 | case 1: // hw- or sw-ecp |
307 | cam->ppmode = IEEE1284_MODE_ECP; | |
308 | break; | |
309 | case 2: // hw- or sw-epp | |
310 | cam->ppmode = IEEE1284_MODE_EPP; | |
311 | break; | |
312 | } | |
d56410e0 | 313 | |
1da177e4 LT |
314 | // Tell the parport driver that we exists |
315 | cam->pdev = parport_register_device(port, "w9966", NULL, NULL, NULL, 0, NULL); | |
316 | if (cam->pdev == NULL) { | |
317 | DPRINTF("parport_register_device() failed\n"); | |
318 | return -1; | |
319 | } | |
320 | w9966_setState(cam, W9966_STATE_PDEV, W9966_STATE_PDEV); | |
321 | ||
322 | w9966_pdev_claim(cam); | |
d56410e0 | 323 | |
1da177e4 LT |
324 | // Setup a default capture mode |
325 | if (w9966_setup(cam, 0, 0, 1023, 1023, 200, 160) != 0) { | |
326 | DPRINTF("w9966_setup() failed.\n"); | |
327 | return -1; | |
328 | } | |
329 | ||
330 | w9966_pdev_release(cam); | |
331 | ||
332 | // Fill in the video_device struct and register us to v4l | |
333 | memcpy(&cam->vdev, &w9966_template, sizeof(struct video_device)); | |
334 | cam->vdev.priv = cam; | |
335 | ||
d56410e0 | 336 | if (video_register_device(&cam->vdev, VFL_TYPE_GRABBER, video_nr) == -1) |
1da177e4 | 337 | return -1; |
d56410e0 | 338 | |
1da177e4 | 339 | w9966_setState(cam, W9966_STATE_VDEV, W9966_STATE_VDEV); |
d56410e0 | 340 | |
1da177e4 LT |
341 | // All ok |
342 | printk( | |
343 | "w9966cf: Found and initialized a webcam on %s.\n", | |
344 | cam->pport->name | |
345 | ); | |
346 | return 0; | |
347 | } | |
348 | ||
349 | ||
350 | // Terminate everything gracefully | |
351 | static void w9966_term(struct w9966_dev* cam) | |
352 | { | |
353 | // Unregister from v4l | |
354 | if (w9966_getState(cam, W9966_STATE_VDEV, W9966_STATE_VDEV)) { | |
355 | video_unregister_device(&cam->vdev); | |
356 | w9966_setState(cam, W9966_STATE_VDEV, 0); | |
357 | } | |
358 | ||
359 | // Terminate from IEEE1284 mode and release pdev block | |
360 | if (w9966_getState(cam, W9966_STATE_PDEV, W9966_STATE_PDEV)) { | |
361 | w9966_pdev_claim(cam); | |
362 | parport_negotiate(cam->pport, IEEE1284_MODE_COMPAT); | |
363 | w9966_pdev_release(cam); | |
364 | } | |
365 | ||
366 | // Unregister from parport | |
367 | if (w9966_getState(cam, W9966_STATE_PDEV, W9966_STATE_PDEV)) { | |
368 | parport_unregister_device(cam->pdev); | |
369 | w9966_setState(cam, W9966_STATE_PDEV, 0); | |
370 | } | |
371 | } | |
372 | ||
373 | ||
374 | // Find a good length for capture window (used both for W and H) | |
375 | // A bit ugly but pretty functional. The capture length | |
376 | // have to match the downscale | |
377 | static int w9966_findlen(int near, int size, int maxlen) | |
378 | { | |
379 | int bestlen = size; | |
380 | int besterr = abs(near - bestlen); | |
381 | int len; | |
382 | ||
383 | for(len = size+1;len < maxlen;len++) | |
384 | { | |
385 | int err; | |
386 | if ( ((64*size) %len) != 0) | |
387 | continue; | |
388 | ||
389 | err = abs(near - len); | |
390 | ||
391 | // Only continue as long as we keep getting better values | |
392 | if (err > besterr) | |
393 | break; | |
d56410e0 | 394 | |
1da177e4 LT |
395 | besterr = err; |
396 | bestlen = len; | |
397 | } | |
398 | ||
399 | return bestlen; | |
400 | } | |
401 | ||
d56410e0 | 402 | // Modify capture window (if necessary) |
1da177e4 LT |
403 | // and calculate downscaling |
404 | // Return -1 on error | |
405 | static int w9966_calcscale(int size, int min, int max, int* beg, int* end, unsigned char* factor) | |
406 | { | |
407 | int maxlen = max - min; | |
408 | int len = *end - *beg + 1; | |
409 | int newlen = w9966_findlen(len, size, maxlen); | |
d56410e0 | 410 | int err = newlen - len; |
1da177e4 LT |
411 | |
412 | // Check for bad format | |
413 | if (newlen > maxlen || newlen < size) | |
414 | return -1; | |
415 | ||
416 | // Set factor (6 bit fixed) | |
417 | *factor = (64*size) / newlen; | |
418 | if (*factor == 64) | |
419 | *factor = 0x00; // downscale is disabled | |
420 | else | |
421 | *factor |= 0x80; // set downscale-enable bit | |
422 | ||
423 | // Modify old beginning and end | |
424 | *beg -= err / 2; | |
425 | *end += err - (err / 2); | |
426 | ||
427 | // Move window if outside borders | |
428 | if (*beg < min) { | |
429 | *end += min - *beg; | |
430 | *beg += min - *beg; | |
431 | } | |
432 | if (*end > max) { | |
433 | *beg -= *end - max; | |
434 | *end -= *end - max; | |
435 | } | |
436 | ||
437 | return 0; | |
438 | } | |
439 | ||
440 | // Setup the cameras capture window etc. | |
441 | // Expects a claimed pdev | |
442 | // return -1 on error | |
443 | static int w9966_setup(struct w9966_dev* cam, int x1, int y1, int x2, int y2, int w, int h) | |
444 | { | |
445 | unsigned int i; | |
446 | unsigned int enh_s, enh_e; | |
447 | unsigned char scale_x, scale_y; | |
448 | unsigned char regs[0x1c]; | |
449 | unsigned char saa7111_regs[] = { | |
450 | 0x21, 0x00, 0xd8, 0x23, 0x00, 0x80, 0x80, 0x00, | |
451 | 0x88, 0x10, 0x80, 0x40, 0x40, 0x00, 0x01, 0x00, | |
452 | 0x48, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
453 | 0x00, 0x00, 0x00, 0x71, 0xe7, 0x00, 0x00, 0xc0 | |
454 | }; | |
d56410e0 MCC |
455 | |
456 | ||
1da177e4 LT |
457 | if (w*h*2 > W9966_SRAMSIZE) |
458 | { | |
459 | DPRINTF("capture window exceeds SRAM size!.\n"); | |
460 | w = 200; h = 160; // Pick default values | |
461 | } | |
462 | ||
463 | w &= ~0x1; | |
464 | if (w < 2) w = 2; | |
465 | if (h < 1) h = 1; | |
466 | if (w > W9966_WND_MAX_W) w = W9966_WND_MAX_W; | |
467 | if (h > W9966_WND_MAX_H) h = W9966_WND_MAX_H; | |
468 | ||
469 | cam->width = w; | |
470 | cam->height = h; | |
471 | ||
d56410e0 | 472 | enh_s = 0; |
1da177e4 | 473 | enh_e = w*h*2; |
d56410e0 | 474 | |
1da177e4 LT |
475 | // Modify capture window if necessary and calculate downscaling |
476 | if ( | |
477 | w9966_calcscale(w, W9966_WND_MIN_X, W9966_WND_MAX_X, &x1, &x2, &scale_x) != 0 || | |
478 | w9966_calcscale(h, W9966_WND_MIN_Y, W9966_WND_MAX_Y, &y1, &y2, &scale_y) != 0 | |
479 | ) return -1; | |
480 | ||
481 | DPRINTF( | |
482 | "%dx%d, x: %d<->%d, y: %d<->%d, sx: %d/64, sy: %d/64.\n", | |
483 | w, h, x1, x2, y1, y2, scale_x&~0x80, scale_y&~0x80 | |
484 | ); | |
d56410e0 | 485 | |
1da177e4 LT |
486 | // Setup registers |
487 | regs[0x00] = 0x00; // Set normal operation | |
488 | regs[0x01] = 0x18; // Capture mode | |
489 | regs[0x02] = scale_y; // V-scaling | |
490 | regs[0x03] = scale_x; // H-scaling | |
d56410e0 MCC |
491 | |
492 | // Capture window | |
1da177e4 LT |
493 | regs[0x04] = (x1 & 0x0ff); // X-start (8 low bits) |
494 | regs[0x05] = (x1 & 0x300)>>8; // X-start (2 high bits) | |
495 | regs[0x06] = (y1 & 0x0ff); // Y-start (8 low bits) | |
496 | regs[0x07] = (y1 & 0x300)>>8; // Y-start (2 high bits) | |
497 | regs[0x08] = (x2 & 0x0ff); // X-end (8 low bits) | |
498 | regs[0x09] = (x2 & 0x300)>>8; // X-end (2 high bits) | |
499 | regs[0x0a] = (y2 & 0x0ff); // Y-end (8 low bits) | |
500 | ||
501 | regs[0x0c] = W9966_SRAMID; // SRAM-banks (1x 128kb) | |
d56410e0 | 502 | |
1da177e4 LT |
503 | // Enhancement layer |
504 | regs[0x0d] = (enh_s& 0x000ff); // Enh. start (0-7) | |
505 | regs[0x0e] = (enh_s& 0x0ff00)>>8; // Enh. start (8-15) | |
506 | regs[0x0f] = (enh_s& 0x70000)>>16; // Enh. start (16-17/18??) | |
507 | regs[0x10] = (enh_e& 0x000ff); // Enh. end (0-7) | |
508 | regs[0x11] = (enh_e& 0x0ff00)>>8; // Enh. end (8-15) | |
509 | regs[0x12] = (enh_e& 0x70000)>>16; // Enh. end (16-17/18??) | |
510 | ||
511 | // Misc | |
512 | regs[0x13] = 0x40; // VEE control (raw 4:2:2) | |
513 | regs[0x17] = 0x00; // ??? | |
514 | regs[0x18] = cam->i2c_state = 0x00; // Serial bus | |
515 | regs[0x19] = 0xff; // I/O port direction control | |
516 | regs[0x1a] = 0xff; // I/O port data register | |
517 | regs[0x1b] = 0x10; // ??? | |
d56410e0 | 518 | |
1da177e4 LT |
519 | // SAA7111 chip settings |
520 | saa7111_regs[0x0a] = cam->brightness; | |
521 | saa7111_regs[0x0b] = cam->contrast; | |
522 | saa7111_regs[0x0c] = cam->color; | |
523 | saa7111_regs[0x0d] = cam->hue; | |
524 | ||
525 | // Reset (ECP-fifo & serial-bus) | |
526 | if (w9966_wReg(cam, 0x00, 0x03) == -1) | |
527 | return -1; | |
528 | ||
529 | // Write regs to w9966cf chip | |
530 | for (i = 0; i < 0x1c; i++) | |
531 | if (w9966_wReg(cam, i, regs[i]) == -1) | |
532 | return -1; | |
533 | ||
534 | // Write regs to saa7111 chip | |
535 | for (i = 0; i < 0x20; i++) | |
536 | if (w9966_wReg_i2c(cam, i, saa7111_regs[i]) == -1) | |
537 | return -1; | |
538 | ||
539 | return 0; | |
540 | } | |
541 | ||
542 | /* | |
543 | * Ugly and primitive i2c protocol functions | |
544 | */ | |
545 | ||
546 | // Sets the data line on the i2c bus. | |
547 | // Expects a claimed pdev. | |
548 | static inline void w9966_i2c_setsda(struct w9966_dev* cam, int state) | |
549 | { | |
550 | if (state) | |
551 | cam->i2c_state |= W9966_I2C_W_DATA; | |
552 | else | |
553 | cam->i2c_state &= ~W9966_I2C_W_DATA; | |
d56410e0 | 554 | |
1da177e4 LT |
555 | w9966_wReg(cam, 0x18, cam->i2c_state); |
556 | udelay(5); | |
557 | } | |
558 | ||
559 | // Get peripheral clock line | |
560 | // Expects a claimed pdev. | |
561 | static inline int w9966_i2c_getscl(struct w9966_dev* cam) | |
562 | { | |
563 | const unsigned char state = w9966_rReg(cam, 0x18); | |
564 | return ((state & W9966_I2C_R_CLOCK) > 0); | |
565 | } | |
566 | ||
567 | // Sets the clock line on the i2c bus. | |
568 | // Expects a claimed pdev. -1 on error | |
569 | static inline int w9966_i2c_setscl(struct w9966_dev* cam, int state) | |
570 | { | |
571 | unsigned long timeout; | |
572 | ||
573 | if (state) | |
574 | cam->i2c_state |= W9966_I2C_W_CLOCK; | |
575 | else | |
576 | cam->i2c_state &= ~W9966_I2C_W_CLOCK; | |
577 | ||
578 | w9966_wReg(cam, 0x18, cam->i2c_state); | |
579 | udelay(5); | |
d56410e0 | 580 | |
1da177e4 LT |
581 | // we go to high, we also expect the peripheral to ack. |
582 | if (state) { | |
583 | timeout = jiffies + 100; | |
584 | while (!w9966_i2c_getscl(cam)) { | |
585 | if (time_after(jiffies, timeout)) | |
586 | return -1; | |
587 | } | |
588 | } | |
589 | return 0; | |
590 | } | |
591 | ||
592 | // Get peripheral data line | |
593 | // Expects a claimed pdev. | |
594 | static inline int w9966_i2c_getsda(struct w9966_dev* cam) | |
595 | { | |
596 | const unsigned char state = w9966_rReg(cam, 0x18); | |
597 | return ((state & W9966_I2C_R_DATA) > 0); | |
598 | } | |
599 | ||
600 | // Write a byte with ack to the i2c bus. | |
601 | // Expects a claimed pdev. -1 on error | |
602 | static int w9966_i2c_wbyte(struct w9966_dev* cam, int data) | |
603 | { | |
604 | int i; | |
605 | for (i = 7; i >= 0; i--) | |
606 | { | |
607 | w9966_i2c_setsda(cam, (data >> i) & 0x01); | |
608 | ||
609 | if (w9966_i2c_setscl(cam, 1) == -1) | |
d56410e0 | 610 | return -1; |
1da177e4 LT |
611 | w9966_i2c_setscl(cam, 0); |
612 | } | |
613 | ||
614 | w9966_i2c_setsda(cam, 1); | |
d56410e0 | 615 | |
1da177e4 LT |
616 | if (w9966_i2c_setscl(cam, 1) == -1) |
617 | return -1; | |
618 | w9966_i2c_setscl(cam, 0); | |
d56410e0 | 619 | |
1da177e4 LT |
620 | return 0; |
621 | } | |
622 | ||
623 | // Read a data byte with ack from the i2c-bus | |
624 | // Expects a claimed pdev. -1 on error | |
625 | #if 0 | |
626 | static int w9966_i2c_rbyte(struct w9966_dev* cam) | |
627 | { | |
628 | unsigned char data = 0x00; | |
d56410e0 MCC |
629 | int i; |
630 | ||
1da177e4 LT |
631 | w9966_i2c_setsda(cam, 1); |
632 | ||
633 | for (i = 0; i < 8; i++) | |
634 | { | |
635 | if (w9966_i2c_setscl(cam, 1) == -1) | |
636 | return -1; | |
637 | data = data << 1; | |
638 | if (w9966_i2c_getsda(cam)) | |
639 | data |= 0x01; | |
d56410e0 | 640 | |
1da177e4 LT |
641 | w9966_i2c_setscl(cam, 0); |
642 | } | |
643 | return data; | |
644 | } | |
645 | #endif | |
646 | ||
647 | // Read a register from the i2c device. | |
648 | // Expects claimed pdev. -1 on error | |
649 | #if 0 | |
650 | static int w9966_rReg_i2c(struct w9966_dev* cam, int reg) | |
651 | { | |
652 | int data; | |
653 | ||
654 | w9966_i2c_setsda(cam, 0); | |
655 | w9966_i2c_setscl(cam, 0); | |
656 | ||
657 | if ( | |
658 | w9966_i2c_wbyte(cam, W9966_I2C_W_ID) == -1 || | |
659 | w9966_i2c_wbyte(cam, reg) == -1 | |
660 | ) | |
661 | return -1; | |
662 | ||
663 | w9966_i2c_setsda(cam, 1); | |
664 | if (w9966_i2c_setscl(cam, 1) == -1) | |
665 | return -1; | |
666 | w9966_i2c_setsda(cam, 0); | |
667 | w9966_i2c_setscl(cam, 0); | |
668 | ||
669 | if ( | |
670 | w9966_i2c_wbyte(cam, W9966_I2C_R_ID) == -1 || | |
671 | (data = w9966_i2c_rbyte(cam)) == -1 | |
672 | ) | |
673 | return -1; | |
674 | ||
675 | w9966_i2c_setsda(cam, 0); | |
d56410e0 | 676 | |
1da177e4 LT |
677 | if (w9966_i2c_setscl(cam, 1) == -1) |
678 | return -1; | |
679 | w9966_i2c_setsda(cam, 1); | |
d56410e0 | 680 | |
1da177e4 LT |
681 | return data; |
682 | } | |
683 | #endif | |
684 | ||
685 | // Write a register to the i2c device. | |
686 | // Expects claimed pdev. -1 on error | |
687 | static int w9966_wReg_i2c(struct w9966_dev* cam, int reg, int data) | |
688 | { | |
689 | w9966_i2c_setsda(cam, 0); | |
690 | w9966_i2c_setscl(cam, 0); | |
691 | ||
692 | if ( | |
693 | w9966_i2c_wbyte(cam, W9966_I2C_W_ID) == -1 || | |
694 | w9966_i2c_wbyte(cam, reg) == -1 || | |
695 | w9966_i2c_wbyte(cam, data) == -1 | |
696 | ) | |
697 | return -1; | |
698 | ||
699 | w9966_i2c_setsda(cam, 0); | |
700 | if (w9966_i2c_setscl(cam, 1) == -1) | |
701 | return -1; | |
d56410e0 | 702 | |
1da177e4 LT |
703 | w9966_i2c_setsda(cam, 1); |
704 | ||
705 | return 0; | |
706 | } | |
707 | ||
708 | /* | |
709 | * Video4linux interfacing | |
710 | */ | |
711 | ||
712 | static int w9966_v4l_do_ioctl(struct inode *inode, struct file *file, | |
713 | unsigned int cmd, void *arg) | |
714 | { | |
715 | struct video_device *vdev = video_devdata(file); | |
716 | struct w9966_dev *cam = vdev->priv; | |
d56410e0 | 717 | |
1da177e4 LT |
718 | switch(cmd) |
719 | { | |
720 | case VIDIOCGCAP: | |
721 | { | |
722 | static struct video_capability vcap = { | |
723 | .name = W9966_DRIVERNAME, | |
724 | .type = VID_TYPE_CAPTURE | VID_TYPE_SCALES, | |
725 | .channels = 1, | |
726 | .maxwidth = W9966_WND_MAX_W, | |
727 | .maxheight = W9966_WND_MAX_H, | |
728 | .minwidth = 2, | |
729 | .minheight = 1, | |
730 | }; | |
731 | struct video_capability *cap = arg; | |
732 | *cap = vcap; | |
733 | return 0; | |
734 | } | |
735 | case VIDIOCGCHAN: | |
736 | { | |
737 | struct video_channel *vch = arg; | |
738 | if(vch->channel != 0) // We only support one channel (#0) | |
739 | return -EINVAL; | |
740 | memset(vch,0,sizeof(*vch)); | |
741 | strcpy(vch->name, "CCD-input"); | |
742 | vch->type = VIDEO_TYPE_CAMERA; | |
743 | return 0; | |
744 | } | |
745 | case VIDIOCSCHAN: | |
746 | { | |
747 | struct video_channel *vch = arg; | |
748 | if(vch->channel != 0) | |
749 | return -EINVAL; | |
750 | return 0; | |
751 | } | |
752 | case VIDIOCGTUNER: | |
753 | { | |
754 | struct video_tuner *vtune = arg; | |
755 | if(vtune->tuner != 0) | |
756 | return -EINVAL; | |
757 | strcpy(vtune->name, "no tuner"); | |
758 | vtune->rangelow = 0; | |
759 | vtune->rangehigh = 0; | |
760 | vtune->flags = VIDEO_TUNER_NORM; | |
761 | vtune->mode = VIDEO_MODE_AUTO; | |
762 | vtune->signal = 0xffff; | |
763 | return 0; | |
764 | } | |
765 | case VIDIOCSTUNER: | |
766 | { | |
767 | struct video_tuner *vtune = arg; | |
768 | if (vtune->tuner != 0) | |
769 | return -EINVAL; | |
770 | if (vtune->mode != VIDEO_MODE_AUTO) | |
771 | return -EINVAL; | |
772 | return 0; | |
773 | } | |
774 | case VIDIOCGPICT: | |
775 | { | |
776 | struct video_picture vpic = { | |
777 | cam->brightness << 8, // brightness | |
778 | (cam->hue + 128) << 8, // hue | |
779 | cam->color << 9, // color | |
780 | cam->contrast << 9, // contrast | |
781 | 0x8000, // whiteness | |
782 | 16, VIDEO_PALETTE_YUV422// bpp, palette format | |
783 | }; | |
784 | struct video_picture *pic = arg; | |
785 | *pic = vpic; | |
786 | return 0; | |
787 | } | |
788 | case VIDIOCSPICT: | |
789 | { | |
790 | struct video_picture *vpic = arg; | |
791 | if (vpic->depth != 16 || vpic->palette != VIDEO_PALETTE_YUV422) | |
792 | return -EINVAL; | |
d56410e0 | 793 | |
1da177e4 LT |
794 | cam->brightness = vpic->brightness >> 8; |
795 | cam->hue = (vpic->hue >> 8) - 128; | |
796 | cam->color = vpic->colour >> 9; | |
797 | cam->contrast = vpic->contrast >> 9; | |
798 | ||
799 | w9966_pdev_claim(cam); | |
d56410e0 | 800 | |
1da177e4 LT |
801 | if ( |
802 | w9966_wReg_i2c(cam, 0x0a, cam->brightness) == -1 || | |
803 | w9966_wReg_i2c(cam, 0x0b, cam->contrast) == -1 || | |
804 | w9966_wReg_i2c(cam, 0x0c, cam->color) == -1 || | |
805 | w9966_wReg_i2c(cam, 0x0d, cam->hue) == -1 | |
806 | ) { | |
807 | w9966_pdev_release(cam); | |
808 | return -EIO; | |
809 | } | |
d56410e0 | 810 | |
1da177e4 LT |
811 | w9966_pdev_release(cam); |
812 | return 0; | |
813 | } | |
814 | case VIDIOCSWIN: | |
815 | { | |
816 | int ret; | |
817 | struct video_window *vwin = arg; | |
d56410e0 | 818 | |
1da177e4 LT |
819 | if (vwin->flags != 0) |
820 | return -EINVAL; | |
821 | if (vwin->clipcount != 0) | |
822 | return -EINVAL; | |
823 | if (vwin->width < 2 || vwin->width > W9966_WND_MAX_W) | |
d56410e0 | 824 | return -EINVAL; |
1da177e4 LT |
825 | if (vwin->height < 1 || vwin->height > W9966_WND_MAX_H) |
826 | return -EINVAL; | |
827 | ||
828 | // Update camera regs | |
829 | w9966_pdev_claim(cam); | |
830 | ret = w9966_setup(cam, 0, 0, 1023, 1023, vwin->width, vwin->height); | |
831 | w9966_pdev_release(cam); | |
d56410e0 | 832 | |
1da177e4 LT |
833 | if (ret != 0) { |
834 | DPRINTF("VIDIOCSWIN: w9966_setup() failed.\n"); | |
835 | return -EIO; | |
836 | } | |
d56410e0 | 837 | |
1da177e4 LT |
838 | return 0; |
839 | } | |
840 | case VIDIOCGWIN: | |
841 | { | |
842 | struct video_window *vwin = arg; | |
843 | memset(vwin, 0, sizeof(*vwin)); | |
844 | vwin->width = cam->width; | |
845 | vwin->height = cam->height; | |
846 | return 0; | |
847 | } | |
848 | // Unimplemented | |
d56410e0 | 849 | case VIDIOCCAPTURE: |
1da177e4 LT |
850 | case VIDIOCGFBUF: |
851 | case VIDIOCSFBUF: | |
852 | case VIDIOCKEY: | |
853 | case VIDIOCGFREQ: | |
854 | case VIDIOCSFREQ: | |
855 | case VIDIOCGAUDIO: | |
856 | case VIDIOCSAUDIO: | |
857 | return -EINVAL; | |
858 | default: | |
859 | return -ENOIOCTLCMD; | |
860 | } | |
861 | return 0; | |
862 | } | |
863 | ||
864 | static int w9966_v4l_ioctl(struct inode *inode, struct file *file, | |
865 | unsigned int cmd, unsigned long arg) | |
866 | { | |
867 | return video_usercopy(inode, file, cmd, arg, w9966_v4l_do_ioctl); | |
868 | } | |
869 | ||
870 | // Capture data | |
871 | static ssize_t w9966_v4l_read(struct file *file, char __user *buf, | |
872 | size_t count, loff_t *ppos) | |
873 | { | |
874 | struct video_device *vdev = video_devdata(file); | |
875 | struct w9966_dev *cam = vdev->priv; | |
876 | unsigned char addr = 0xa0; // ECP, read, CCD-transfer, 00000 | |
877 | unsigned char __user *dest = (unsigned char __user *)buf; | |
878 | unsigned long dleft = count; | |
879 | unsigned char *tbuf; | |
d56410e0 | 880 | |
1da177e4 LT |
881 | // Why would anyone want more than this?? |
882 | if (count > cam->width * cam->height * 2) | |
883 | return -EINVAL; | |
d56410e0 | 884 | |
1da177e4 LT |
885 | w9966_pdev_claim(cam); |
886 | w9966_wReg(cam, 0x00, 0x02); // Reset ECP-FIFO buffer | |
887 | w9966_wReg(cam, 0x00, 0x00); // Return to normal operation | |
888 | w9966_wReg(cam, 0x01, 0x98); // Enable capture | |
889 | ||
d56410e0 | 890 | // write special capture-addr and negotiate into data transfer |
1da177e4 LT |
891 | if ( |
892 | (parport_negotiate(cam->pport, cam->ppmode|IEEE1284_ADDR) != 0 )|| | |
893 | (parport_write(cam->pport, &addr, 1) != 1 )|| | |
894 | (parport_negotiate(cam->pport, cam->ppmode|IEEE1284_DATA) != 0 ) | |
895 | ) { | |
896 | w9966_pdev_release(cam); | |
897 | return -EFAULT; | |
898 | } | |
899 | ||
900 | tbuf = kmalloc(W9966_RBUFFER, GFP_KERNEL); | |
901 | if (tbuf == NULL) { | |
902 | count = -ENOMEM; | |
903 | goto out; | |
904 | } | |
905 | ||
906 | while(dleft > 0) | |
907 | { | |
908 | unsigned long tsize = (dleft > W9966_RBUFFER) ? W9966_RBUFFER : dleft; | |
d56410e0 | 909 | |
1da177e4 LT |
910 | if (parport_read(cam->pport, tbuf, tsize) < tsize) { |
911 | count = -EFAULT; | |
912 | goto out; | |
913 | } | |
914 | if (copy_to_user(dest, tbuf, tsize) != 0) { | |
915 | count = -EFAULT; | |
916 | goto out; | |
917 | } | |
918 | dest += tsize; | |
919 | dleft -= tsize; | |
920 | } | |
921 | ||
922 | w9966_wReg(cam, 0x01, 0x18); // Disable capture | |
923 | ||
924 | out: | |
925 | kfree(tbuf); | |
926 | w9966_pdev_release(cam); | |
927 | ||
928 | return count; | |
929 | } | |
930 | ||
931 | ||
932 | // Called once for every parport on init | |
933 | static void w9966_attach(struct parport *port) | |
934 | { | |
935 | int i; | |
d56410e0 | 936 | |
1da177e4 LT |
937 | for (i = 0; i < W9966_MAXCAMS; i++) |
938 | { | |
939 | if (w9966_cams[i].dev_state != 0) // Cam is already assigned | |
940 | continue; | |
941 | if ( | |
942 | strcmp(pardev[i], "aggressive") == 0 || | |
943 | strcmp(pardev[i], port->name) == 0 | |
944 | ) { | |
945 | if (w9966_init(&w9966_cams[i], port) != 0) | |
946 | w9966_term(&w9966_cams[i]); | |
947 | break; // return | |
948 | } | |
949 | } | |
950 | } | |
951 | ||
952 | // Called once for every parport on termination | |
953 | static void w9966_detach(struct parport *port) | |
954 | { | |
955 | int i; | |
956 | for (i = 0; i < W9966_MAXCAMS; i++) | |
957 | if (w9966_cams[i].dev_state != 0 && w9966_cams[i].pport == port) | |
958 | w9966_term(&w9966_cams[i]); | |
959 | } | |
960 | ||
961 | ||
962 | static struct parport_driver w9966_ppd = { | |
963 | .name = W9966_DRIVERNAME, | |
964 | .attach = w9966_attach, | |
965 | .detach = w9966_detach, | |
966 | }; | |
967 | ||
968 | // Module entry point | |
969 | static int __init w9966_mod_init(void) | |
970 | { | |
971 | int i; | |
972 | for (i = 0; i < W9966_MAXCAMS; i++) | |
973 | w9966_cams[i].dev_state = 0; | |
974 | ||
975 | return parport_register_driver(&w9966_ppd); | |
976 | } | |
977 | ||
978 | // Module cleanup | |
979 | static void __exit w9966_mod_term(void) | |
980 | { | |
981 | parport_unregister_driver(&w9966_ppd); | |
982 | } | |
983 | ||
984 | module_init(w9966_mod_init); | |
985 | module_exit(w9966_mod_term); |