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> | |
5e87efa3 | 61 | #include <media/v4l2-common.h> |
1da177e4 LT |
62 | #include <linux/parport.h> |
63 | ||
64 | //#define DEBUG // Undef me for production | |
65 | ||
66 | #ifdef DEBUG | |
67 | #define DPRINTF(x, a...) printk(KERN_DEBUG "W9966: %s(): "x, __FUNCTION__ , ##a) | |
68 | #else | |
69 | #define DPRINTF(x...) | |
70 | #endif | |
71 | ||
72 | /* | |
73 | * Defines, simple typedefs etc. | |
74 | */ | |
75 | ||
76 | #define W9966_DRIVERNAME "W9966CF Webcam" | |
77 | #define W9966_MAXCAMS 4 // Maximum number of cameras | |
78 | #define W9966_RBUFFER 2048 // Read buffer (must be an even number) | |
79 | #define W9966_SRAMSIZE 131072 // 128kb | |
80 | #define W9966_SRAMID 0x02 // check w9966cf.pdf | |
81 | ||
82 | // Empirically determined window limits | |
83 | #define W9966_WND_MIN_X 16 | |
84 | #define W9966_WND_MIN_Y 14 | |
85 | #define W9966_WND_MAX_X 705 | |
86 | #define W9966_WND_MAX_Y 253 | |
87 | #define W9966_WND_MAX_W (W9966_WND_MAX_X - W9966_WND_MIN_X) | |
88 | #define W9966_WND_MAX_H (W9966_WND_MAX_Y - W9966_WND_MIN_Y) | |
89 | ||
90 | // Keep track of our current state | |
91 | #define W9966_STATE_PDEV 0x01 | |
92 | #define W9966_STATE_CLAIMED 0x02 | |
93 | #define W9966_STATE_VDEV 0x04 | |
94 | ||
95 | #define W9966_I2C_W_ID 0x48 | |
96 | #define W9966_I2C_R_ID 0x49 | |
97 | #define W9966_I2C_R_DATA 0x08 | |
98 | #define W9966_I2C_R_CLOCK 0x04 | |
99 | #define W9966_I2C_W_DATA 0x02 | |
100 | #define W9966_I2C_W_CLOCK 0x01 | |
101 | ||
102 | struct w9966_dev { | |
103 | unsigned char dev_state; | |
104 | unsigned char i2c_state; | |
105 | unsigned short ppmode; | |
106 | struct parport* pport; | |
107 | struct pardevice* pdev; | |
108 | struct video_device vdev; | |
109 | unsigned short width; | |
110 | unsigned short height; | |
111 | unsigned char brightness; | |
112 | signed char contrast; | |
113 | signed char color; | |
114 | signed char hue; | |
115 | }; | |
116 | ||
117 | /* | |
118 | * Module specific properties | |
119 | */ | |
120 | ||
121 | MODULE_AUTHOR("Jakob Kemi <jakob.kemi@post.utfors.se>"); | |
122 | MODULE_DESCRIPTION("Winbond w9966cf WebCam driver (0.32)"); | |
123 | MODULE_LICENSE("GPL"); | |
124 | ||
125 | ||
126 | #ifdef MODULE | |
127 | static const char* pardev[] = {[0 ... W9966_MAXCAMS] = ""}; | |
128 | #else | |
129 | static const char* pardev[] = {[0 ... W9966_MAXCAMS] = "aggressive"}; | |
130 | #endif | |
131 | module_param_array(pardev, charp, NULL, 0); | |
132 | MODULE_PARM_DESC(pardev, "pardev: where to search for\n\ | |
133 | \teach camera. 'aggressive' means brute-force search.\n\ | |
134 | \tEg: >pardev=parport3,aggressive,parport2,parport1< would assign\n\ | |
135 | \tcam 1 to parport3 and search every parport for cam 2 etc..."); | |
136 | ||
137 | static int parmode = 0; | |
138 | module_param(parmode, int, 0); | |
139 | MODULE_PARM_DESC(parmode, "parmode: transfer mode (0=auto, 1=ecp, 2=epp"); | |
140 | ||
141 | static int video_nr = -1; | |
142 | module_param(video_nr, int, 0); | |
143 | ||
144 | /* | |
145 | * Private data | |
146 | */ | |
147 | ||
148 | static struct w9966_dev w9966_cams[W9966_MAXCAMS]; | |
149 | ||
150 | /* | |
151 | * Private function declares | |
152 | */ | |
153 | ||
154 | static inline void w9966_setState(struct w9966_dev* cam, int mask, int val); | |
155 | static inline int w9966_getState(struct w9966_dev* cam, int mask, int val); | |
156 | static inline void w9966_pdev_claim(struct w9966_dev *vdev); | |
157 | static inline void w9966_pdev_release(struct w9966_dev *vdev); | |
158 | ||
159 | static int w9966_rReg(struct w9966_dev* cam, int reg); | |
160 | static int w9966_wReg(struct w9966_dev* cam, int reg, int data); | |
161 | #if 0 | |
162 | static int w9966_rReg_i2c(struct w9966_dev* cam, int reg); | |
163 | #endif | |
164 | static int w9966_wReg_i2c(struct w9966_dev* cam, int reg, int data); | |
165 | static int w9966_findlen(int near, int size, int maxlen); | |
166 | static int w9966_calcscale(int size, int min, int max, int* beg, int* end, unsigned char* factor); | |
167 | static int w9966_setup(struct w9966_dev* cam, int x1, int y1, int x2, int y2, int w, int h); | |
168 | ||
169 | static int w9966_init(struct w9966_dev* cam, struct parport* port); | |
170 | static void w9966_term(struct w9966_dev* cam); | |
171 | ||
172 | static inline void w9966_i2c_setsda(struct w9966_dev* cam, int state); | |
173 | static inline int w9966_i2c_setscl(struct w9966_dev* cam, int state); | |
174 | static inline int w9966_i2c_getsda(struct w9966_dev* cam); | |
175 | static inline int w9966_i2c_getscl(struct w9966_dev* cam); | |
176 | static int w9966_i2c_wbyte(struct w9966_dev* cam, int data); | |
177 | #if 0 | |
178 | static int w9966_i2c_rbyte(struct w9966_dev* cam); | |
179 | #endif | |
180 | ||
181 | static int w9966_v4l_ioctl(struct inode *inode, struct file *file, | |
182 | unsigned int cmd, unsigned long arg); | |
183 | static ssize_t w9966_v4l_read(struct file *file, char __user *buf, | |
184 | size_t count, loff_t *ppos); | |
185 | ||
186 | static struct file_operations w9966_fops = { | |
187 | .owner = THIS_MODULE, | |
188 | .open = video_exclusive_open, | |
189 | .release = video_exclusive_release, | |
190 | .ioctl = w9966_v4l_ioctl, | |
0d0fbf81 | 191 | .compat_ioctl = v4l_compat_ioctl32, |
1da177e4 LT |
192 | .read = w9966_v4l_read, |
193 | .llseek = no_llseek, | |
194 | }; | |
195 | static struct video_device w9966_template = { | |
196 | .owner = THIS_MODULE, | |
197 | .name = W9966_DRIVERNAME, | |
198 | .type = VID_TYPE_CAPTURE | VID_TYPE_SCALES, | |
199 | .hardware = VID_HARDWARE_W9966, | |
200 | .fops = &w9966_fops, | |
201 | }; | |
202 | ||
203 | /* | |
204 | * Private function defines | |
205 | */ | |
206 | ||
207 | ||
d56410e0 | 208 | // Set camera phase flags, so we know what to uninit when terminating |
1da177e4 LT |
209 | static inline void w9966_setState(struct w9966_dev* cam, int mask, int val) |
210 | { | |
211 | cam->dev_state = (cam->dev_state & ~mask) ^ val; | |
212 | } | |
213 | ||
214 | // Get camera phase flags | |
215 | static inline int w9966_getState(struct w9966_dev* cam, int mask, int val) | |
216 | { | |
217 | return ((cam->dev_state & mask) == val); | |
218 | } | |
219 | ||
220 | // Claim parport for ourself | |
221 | static inline void w9966_pdev_claim(struct w9966_dev* cam) | |
222 | { | |
223 | if (w9966_getState(cam, W9966_STATE_CLAIMED, W9966_STATE_CLAIMED)) | |
224 | return; | |
225 | parport_claim_or_block(cam->pdev); | |
226 | w9966_setState(cam, W9966_STATE_CLAIMED, W9966_STATE_CLAIMED); | |
227 | } | |
228 | ||
229 | // Release parport for others to use | |
230 | static inline void w9966_pdev_release(struct w9966_dev* cam) | |
231 | { | |
232 | if (w9966_getState(cam, W9966_STATE_CLAIMED, 0)) | |
233 | return; | |
234 | parport_release(cam->pdev); | |
235 | w9966_setState(cam, W9966_STATE_CLAIMED, 0); | |
236 | } | |
d56410e0 | 237 | |
1da177e4 LT |
238 | // Read register from W9966 interface-chip |
239 | // Expects a claimed pdev | |
240 | // -1 on error, else register data (byte) | |
241 | static int w9966_rReg(struct w9966_dev* cam, int reg) | |
242 | { | |
243 | // ECP, read, regtransfer, REG, REG, REG, REG, REG | |
244 | const unsigned char addr = 0x80 | (reg & 0x1f); | |
245 | unsigned char val; | |
d56410e0 | 246 | |
1da177e4 LT |
247 | if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_ADDR) != 0) |
248 | return -1; | |
249 | if (parport_write(cam->pport, &addr, 1) != 1) | |
250 | return -1; | |
251 | if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_DATA) != 0) | |
252 | return -1; | |
253 | if (parport_read(cam->pport, &val, 1) != 1) | |
254 | return -1; | |
255 | ||
256 | return val; | |
257 | } | |
258 | ||
259 | // Write register to W9966 interface-chip | |
260 | // Expects a claimed pdev | |
261 | // -1 on error | |
262 | static int w9966_wReg(struct w9966_dev* cam, int reg, int data) | |
263 | { | |
264 | // ECP, write, regtransfer, REG, REG, REG, REG, REG | |
265 | const unsigned char addr = 0xc0 | (reg & 0x1f); | |
266 | const unsigned char val = data; | |
d56410e0 | 267 | |
1da177e4 LT |
268 | if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_ADDR) != 0) |
269 | return -1; | |
270 | if (parport_write(cam->pport, &addr, 1) != 1) | |
271 | return -1; | |
272 | if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_DATA) != 0) | |
273 | return -1; | |
274 | if (parport_write(cam->pport, &val, 1) != 1) | |
275 | return -1; | |
276 | ||
277 | return 0; | |
278 | } | |
279 | ||
280 | // Initialize camera device. Setup all internal flags, set a | |
281 | // default video mode, setup ccd-chip, register v4l device etc.. | |
282 | // Also used for 'probing' of hardware. | |
283 | // -1 on error | |
284 | static int w9966_init(struct w9966_dev* cam, struct parport* port) | |
285 | { | |
286 | if (cam->dev_state != 0) | |
287 | return -1; | |
d56410e0 | 288 | |
1da177e4 LT |
289 | cam->pport = port; |
290 | cam->brightness = 128; | |
291 | cam->contrast = 64; | |
292 | cam->color = 64; | |
293 | cam->hue = 0; | |
294 | ||
295 | // Select requested transfer mode | |
296 | switch(parmode) | |
297 | { | |
298 | default: // Auto-detect (priority: hw-ecp, hw-epp, sw-ecp) | |
299 | case 0: | |
300 | if (port->modes & PARPORT_MODE_ECP) | |
301 | cam->ppmode = IEEE1284_MODE_ECP; | |
302 | else if (port->modes & PARPORT_MODE_EPP) | |
303 | cam->ppmode = IEEE1284_MODE_EPP; | |
304 | else | |
305 | cam->ppmode = IEEE1284_MODE_ECP; | |
d56410e0 | 306 | break; |
1da177e4 LT |
307 | case 1: // hw- or sw-ecp |
308 | cam->ppmode = IEEE1284_MODE_ECP; | |
309 | break; | |
310 | case 2: // hw- or sw-epp | |
311 | cam->ppmode = IEEE1284_MODE_EPP; | |
312 | break; | |
313 | } | |
d56410e0 | 314 | |
1da177e4 LT |
315 | // Tell the parport driver that we exists |
316 | cam->pdev = parport_register_device(port, "w9966", NULL, NULL, NULL, 0, NULL); | |
317 | if (cam->pdev == NULL) { | |
318 | DPRINTF("parport_register_device() failed\n"); | |
319 | return -1; | |
320 | } | |
321 | w9966_setState(cam, W9966_STATE_PDEV, W9966_STATE_PDEV); | |
322 | ||
323 | w9966_pdev_claim(cam); | |
d56410e0 | 324 | |
1da177e4 LT |
325 | // Setup a default capture mode |
326 | if (w9966_setup(cam, 0, 0, 1023, 1023, 200, 160) != 0) { | |
327 | DPRINTF("w9966_setup() failed.\n"); | |
328 | return -1; | |
329 | } | |
330 | ||
331 | w9966_pdev_release(cam); | |
332 | ||
333 | // Fill in the video_device struct and register us to v4l | |
334 | memcpy(&cam->vdev, &w9966_template, sizeof(struct video_device)); | |
335 | cam->vdev.priv = cam; | |
336 | ||
d56410e0 | 337 | if (video_register_device(&cam->vdev, VFL_TYPE_GRABBER, video_nr) == -1) |
1da177e4 | 338 | return -1; |
d56410e0 | 339 | |
1da177e4 | 340 | w9966_setState(cam, W9966_STATE_VDEV, W9966_STATE_VDEV); |
d56410e0 | 341 | |
1da177e4 LT |
342 | // All ok |
343 | printk( | |
344 | "w9966cf: Found and initialized a webcam on %s.\n", | |
345 | cam->pport->name | |
346 | ); | |
347 | return 0; | |
348 | } | |
349 | ||
350 | ||
351 | // Terminate everything gracefully | |
352 | static void w9966_term(struct w9966_dev* cam) | |
353 | { | |
354 | // Unregister from v4l | |
355 | if (w9966_getState(cam, W9966_STATE_VDEV, W9966_STATE_VDEV)) { | |
356 | video_unregister_device(&cam->vdev); | |
357 | w9966_setState(cam, W9966_STATE_VDEV, 0); | |
358 | } | |
359 | ||
360 | // Terminate from IEEE1284 mode and release pdev block | |
361 | if (w9966_getState(cam, W9966_STATE_PDEV, W9966_STATE_PDEV)) { | |
362 | w9966_pdev_claim(cam); | |
363 | parport_negotiate(cam->pport, IEEE1284_MODE_COMPAT); | |
364 | w9966_pdev_release(cam); | |
365 | } | |
366 | ||
367 | // Unregister from parport | |
368 | if (w9966_getState(cam, W9966_STATE_PDEV, W9966_STATE_PDEV)) { | |
369 | parport_unregister_device(cam->pdev); | |
370 | w9966_setState(cam, W9966_STATE_PDEV, 0); | |
371 | } | |
372 | } | |
373 | ||
374 | ||
375 | // Find a good length for capture window (used both for W and H) | |
376 | // A bit ugly but pretty functional. The capture length | |
377 | // have to match the downscale | |
378 | static int w9966_findlen(int near, int size, int maxlen) | |
379 | { | |
380 | int bestlen = size; | |
381 | int besterr = abs(near - bestlen); | |
382 | int len; | |
383 | ||
384 | for(len = size+1;len < maxlen;len++) | |
385 | { | |
386 | int err; | |
387 | if ( ((64*size) %len) != 0) | |
388 | continue; | |
389 | ||
390 | err = abs(near - len); | |
391 | ||
392 | // Only continue as long as we keep getting better values | |
393 | if (err > besterr) | |
394 | break; | |
d56410e0 | 395 | |
1da177e4 LT |
396 | besterr = err; |
397 | bestlen = len; | |
398 | } | |
399 | ||
400 | return bestlen; | |
401 | } | |
402 | ||
d56410e0 | 403 | // Modify capture window (if necessary) |
1da177e4 LT |
404 | // and calculate downscaling |
405 | // Return -1 on error | |
406 | static int w9966_calcscale(int size, int min, int max, int* beg, int* end, unsigned char* factor) | |
407 | { | |
408 | int maxlen = max - min; | |
409 | int len = *end - *beg + 1; | |
410 | int newlen = w9966_findlen(len, size, maxlen); | |
d56410e0 | 411 | int err = newlen - len; |
1da177e4 LT |
412 | |
413 | // Check for bad format | |
414 | if (newlen > maxlen || newlen < size) | |
415 | return -1; | |
416 | ||
417 | // Set factor (6 bit fixed) | |
418 | *factor = (64*size) / newlen; | |
419 | if (*factor == 64) | |
420 | *factor = 0x00; // downscale is disabled | |
421 | else | |
422 | *factor |= 0x80; // set downscale-enable bit | |
423 | ||
424 | // Modify old beginning and end | |
425 | *beg -= err / 2; | |
426 | *end += err - (err / 2); | |
427 | ||
428 | // Move window if outside borders | |
429 | if (*beg < min) { | |
430 | *end += min - *beg; | |
431 | *beg += min - *beg; | |
432 | } | |
433 | if (*end > max) { | |
434 | *beg -= *end - max; | |
435 | *end -= *end - max; | |
436 | } | |
437 | ||
438 | return 0; | |
439 | } | |
440 | ||
441 | // Setup the cameras capture window etc. | |
442 | // Expects a claimed pdev | |
443 | // return -1 on error | |
444 | static int w9966_setup(struct w9966_dev* cam, int x1, int y1, int x2, int y2, int w, int h) | |
445 | { | |
446 | unsigned int i; | |
447 | unsigned int enh_s, enh_e; | |
448 | unsigned char scale_x, scale_y; | |
449 | unsigned char regs[0x1c]; | |
450 | unsigned char saa7111_regs[] = { | |
451 | 0x21, 0x00, 0xd8, 0x23, 0x00, 0x80, 0x80, 0x00, | |
452 | 0x88, 0x10, 0x80, 0x40, 0x40, 0x00, 0x01, 0x00, | |
453 | 0x48, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
454 | 0x00, 0x00, 0x00, 0x71, 0xe7, 0x00, 0x00, 0xc0 | |
455 | }; | |
d56410e0 MCC |
456 | |
457 | ||
1da177e4 LT |
458 | if (w*h*2 > W9966_SRAMSIZE) |
459 | { | |
460 | DPRINTF("capture window exceeds SRAM size!.\n"); | |
461 | w = 200; h = 160; // Pick default values | |
462 | } | |
463 | ||
464 | w &= ~0x1; | |
465 | if (w < 2) w = 2; | |
466 | if (h < 1) h = 1; | |
467 | if (w > W9966_WND_MAX_W) w = W9966_WND_MAX_W; | |
468 | if (h > W9966_WND_MAX_H) h = W9966_WND_MAX_H; | |
469 | ||
470 | cam->width = w; | |
471 | cam->height = h; | |
472 | ||
d56410e0 | 473 | enh_s = 0; |
1da177e4 | 474 | enh_e = w*h*2; |
d56410e0 | 475 | |
1da177e4 LT |
476 | // Modify capture window if necessary and calculate downscaling |
477 | if ( | |
478 | w9966_calcscale(w, W9966_WND_MIN_X, W9966_WND_MAX_X, &x1, &x2, &scale_x) != 0 || | |
479 | w9966_calcscale(h, W9966_WND_MIN_Y, W9966_WND_MAX_Y, &y1, &y2, &scale_y) != 0 | |
480 | ) return -1; | |
481 | ||
482 | DPRINTF( | |
483 | "%dx%d, x: %d<->%d, y: %d<->%d, sx: %d/64, sy: %d/64.\n", | |
484 | w, h, x1, x2, y1, y2, scale_x&~0x80, scale_y&~0x80 | |
485 | ); | |
d56410e0 | 486 | |
1da177e4 LT |
487 | // Setup registers |
488 | regs[0x00] = 0x00; // Set normal operation | |
489 | regs[0x01] = 0x18; // Capture mode | |
490 | regs[0x02] = scale_y; // V-scaling | |
491 | regs[0x03] = scale_x; // H-scaling | |
d56410e0 MCC |
492 | |
493 | // Capture window | |
1da177e4 LT |
494 | regs[0x04] = (x1 & 0x0ff); // X-start (8 low bits) |
495 | regs[0x05] = (x1 & 0x300)>>8; // X-start (2 high bits) | |
496 | regs[0x06] = (y1 & 0x0ff); // Y-start (8 low bits) | |
497 | regs[0x07] = (y1 & 0x300)>>8; // Y-start (2 high bits) | |
498 | regs[0x08] = (x2 & 0x0ff); // X-end (8 low bits) | |
499 | regs[0x09] = (x2 & 0x300)>>8; // X-end (2 high bits) | |
500 | regs[0x0a] = (y2 & 0x0ff); // Y-end (8 low bits) | |
501 | ||
502 | regs[0x0c] = W9966_SRAMID; // SRAM-banks (1x 128kb) | |
d56410e0 | 503 | |
1da177e4 LT |
504 | // Enhancement layer |
505 | regs[0x0d] = (enh_s& 0x000ff); // Enh. start (0-7) | |
506 | regs[0x0e] = (enh_s& 0x0ff00)>>8; // Enh. start (8-15) | |
507 | regs[0x0f] = (enh_s& 0x70000)>>16; // Enh. start (16-17/18??) | |
508 | regs[0x10] = (enh_e& 0x000ff); // Enh. end (0-7) | |
509 | regs[0x11] = (enh_e& 0x0ff00)>>8; // Enh. end (8-15) | |
510 | regs[0x12] = (enh_e& 0x70000)>>16; // Enh. end (16-17/18??) | |
511 | ||
512 | // Misc | |
513 | regs[0x13] = 0x40; // VEE control (raw 4:2:2) | |
514 | regs[0x17] = 0x00; // ??? | |
515 | regs[0x18] = cam->i2c_state = 0x00; // Serial bus | |
516 | regs[0x19] = 0xff; // I/O port direction control | |
517 | regs[0x1a] = 0xff; // I/O port data register | |
518 | regs[0x1b] = 0x10; // ??? | |
d56410e0 | 519 | |
1da177e4 LT |
520 | // SAA7111 chip settings |
521 | saa7111_regs[0x0a] = cam->brightness; | |
522 | saa7111_regs[0x0b] = cam->contrast; | |
523 | saa7111_regs[0x0c] = cam->color; | |
524 | saa7111_regs[0x0d] = cam->hue; | |
525 | ||
526 | // Reset (ECP-fifo & serial-bus) | |
527 | if (w9966_wReg(cam, 0x00, 0x03) == -1) | |
528 | return -1; | |
529 | ||
530 | // Write regs to w9966cf chip | |
531 | for (i = 0; i < 0x1c; i++) | |
532 | if (w9966_wReg(cam, i, regs[i]) == -1) | |
533 | return -1; | |
534 | ||
535 | // Write regs to saa7111 chip | |
536 | for (i = 0; i < 0x20; i++) | |
537 | if (w9966_wReg_i2c(cam, i, saa7111_regs[i]) == -1) | |
538 | return -1; | |
539 | ||
540 | return 0; | |
541 | } | |
542 | ||
543 | /* | |
544 | * Ugly and primitive i2c protocol functions | |
545 | */ | |
546 | ||
547 | // Sets the data line on the i2c bus. | |
548 | // Expects a claimed pdev. | |
549 | static inline void w9966_i2c_setsda(struct w9966_dev* cam, int state) | |
550 | { | |
551 | if (state) | |
552 | cam->i2c_state |= W9966_I2C_W_DATA; | |
553 | else | |
554 | cam->i2c_state &= ~W9966_I2C_W_DATA; | |
d56410e0 | 555 | |
1da177e4 LT |
556 | w9966_wReg(cam, 0x18, cam->i2c_state); |
557 | udelay(5); | |
558 | } | |
559 | ||
560 | // Get peripheral clock line | |
561 | // Expects a claimed pdev. | |
562 | static inline int w9966_i2c_getscl(struct w9966_dev* cam) | |
563 | { | |
564 | const unsigned char state = w9966_rReg(cam, 0x18); | |
565 | return ((state & W9966_I2C_R_CLOCK) > 0); | |
566 | } | |
567 | ||
568 | // Sets the clock line on the i2c bus. | |
569 | // Expects a claimed pdev. -1 on error | |
570 | static inline int w9966_i2c_setscl(struct w9966_dev* cam, int state) | |
571 | { | |
572 | unsigned long timeout; | |
573 | ||
574 | if (state) | |
575 | cam->i2c_state |= W9966_I2C_W_CLOCK; | |
576 | else | |
577 | cam->i2c_state &= ~W9966_I2C_W_CLOCK; | |
578 | ||
579 | w9966_wReg(cam, 0x18, cam->i2c_state); | |
580 | udelay(5); | |
d56410e0 | 581 | |
1da177e4 LT |
582 | // we go to high, we also expect the peripheral to ack. |
583 | if (state) { | |
584 | timeout = jiffies + 100; | |
585 | while (!w9966_i2c_getscl(cam)) { | |
586 | if (time_after(jiffies, timeout)) | |
587 | return -1; | |
588 | } | |
589 | } | |
590 | return 0; | |
591 | } | |
592 | ||
593 | // Get peripheral data line | |
594 | // Expects a claimed pdev. | |
595 | static inline int w9966_i2c_getsda(struct w9966_dev* cam) | |
596 | { | |
597 | const unsigned char state = w9966_rReg(cam, 0x18); | |
598 | return ((state & W9966_I2C_R_DATA) > 0); | |
599 | } | |
600 | ||
601 | // Write a byte with ack to the i2c bus. | |
602 | // Expects a claimed pdev. -1 on error | |
603 | static int w9966_i2c_wbyte(struct w9966_dev* cam, int data) | |
604 | { | |
605 | int i; | |
606 | for (i = 7; i >= 0; i--) | |
607 | { | |
608 | w9966_i2c_setsda(cam, (data >> i) & 0x01); | |
609 | ||
610 | if (w9966_i2c_setscl(cam, 1) == -1) | |
d56410e0 | 611 | return -1; |
1da177e4 LT |
612 | w9966_i2c_setscl(cam, 0); |
613 | } | |
614 | ||
615 | w9966_i2c_setsda(cam, 1); | |
d56410e0 | 616 | |
1da177e4 LT |
617 | if (w9966_i2c_setscl(cam, 1) == -1) |
618 | return -1; | |
619 | w9966_i2c_setscl(cam, 0); | |
d56410e0 | 620 | |
1da177e4 LT |
621 | return 0; |
622 | } | |
623 | ||
624 | // Read a data byte with ack from the i2c-bus | |
625 | // Expects a claimed pdev. -1 on error | |
626 | #if 0 | |
627 | static int w9966_i2c_rbyte(struct w9966_dev* cam) | |
628 | { | |
629 | unsigned char data = 0x00; | |
d56410e0 MCC |
630 | int i; |
631 | ||
1da177e4 LT |
632 | w9966_i2c_setsda(cam, 1); |
633 | ||
634 | for (i = 0; i < 8; i++) | |
635 | { | |
636 | if (w9966_i2c_setscl(cam, 1) == -1) | |
637 | return -1; | |
638 | data = data << 1; | |
639 | if (w9966_i2c_getsda(cam)) | |
640 | data |= 0x01; | |
d56410e0 | 641 | |
1da177e4 LT |
642 | w9966_i2c_setscl(cam, 0); |
643 | } | |
644 | return data; | |
645 | } | |
646 | #endif | |
647 | ||
648 | // Read a register from the i2c device. | |
649 | // Expects claimed pdev. -1 on error | |
650 | #if 0 | |
651 | static int w9966_rReg_i2c(struct w9966_dev* cam, int reg) | |
652 | { | |
653 | int data; | |
654 | ||
655 | w9966_i2c_setsda(cam, 0); | |
656 | w9966_i2c_setscl(cam, 0); | |
657 | ||
658 | if ( | |
659 | w9966_i2c_wbyte(cam, W9966_I2C_W_ID) == -1 || | |
660 | w9966_i2c_wbyte(cam, reg) == -1 | |
661 | ) | |
662 | return -1; | |
663 | ||
664 | w9966_i2c_setsda(cam, 1); | |
665 | if (w9966_i2c_setscl(cam, 1) == -1) | |
666 | return -1; | |
667 | w9966_i2c_setsda(cam, 0); | |
668 | w9966_i2c_setscl(cam, 0); | |
669 | ||
670 | if ( | |
671 | w9966_i2c_wbyte(cam, W9966_I2C_R_ID) == -1 || | |
672 | (data = w9966_i2c_rbyte(cam)) == -1 | |
673 | ) | |
674 | return -1; | |
675 | ||
676 | w9966_i2c_setsda(cam, 0); | |
d56410e0 | 677 | |
1da177e4 LT |
678 | if (w9966_i2c_setscl(cam, 1) == -1) |
679 | return -1; | |
680 | w9966_i2c_setsda(cam, 1); | |
d56410e0 | 681 | |
1da177e4 LT |
682 | return data; |
683 | } | |
684 | #endif | |
685 | ||
686 | // Write a register to the i2c device. | |
687 | // Expects claimed pdev. -1 on error | |
688 | static int w9966_wReg_i2c(struct w9966_dev* cam, int reg, int data) | |
689 | { | |
690 | w9966_i2c_setsda(cam, 0); | |
691 | w9966_i2c_setscl(cam, 0); | |
692 | ||
693 | if ( | |
694 | w9966_i2c_wbyte(cam, W9966_I2C_W_ID) == -1 || | |
695 | w9966_i2c_wbyte(cam, reg) == -1 || | |
696 | w9966_i2c_wbyte(cam, data) == -1 | |
697 | ) | |
698 | return -1; | |
699 | ||
700 | w9966_i2c_setsda(cam, 0); | |
701 | if (w9966_i2c_setscl(cam, 1) == -1) | |
702 | return -1; | |
d56410e0 | 703 | |
1da177e4 LT |
704 | w9966_i2c_setsda(cam, 1); |
705 | ||
706 | return 0; | |
707 | } | |
708 | ||
709 | /* | |
710 | * Video4linux interfacing | |
711 | */ | |
712 | ||
713 | static int w9966_v4l_do_ioctl(struct inode *inode, struct file *file, | |
714 | unsigned int cmd, void *arg) | |
715 | { | |
716 | struct video_device *vdev = video_devdata(file); | |
717 | struct w9966_dev *cam = vdev->priv; | |
d56410e0 | 718 | |
1da177e4 LT |
719 | switch(cmd) |
720 | { | |
721 | case VIDIOCGCAP: | |
722 | { | |
723 | static struct video_capability vcap = { | |
724 | .name = W9966_DRIVERNAME, | |
725 | .type = VID_TYPE_CAPTURE | VID_TYPE_SCALES, | |
726 | .channels = 1, | |
727 | .maxwidth = W9966_WND_MAX_W, | |
728 | .maxheight = W9966_WND_MAX_H, | |
729 | .minwidth = 2, | |
730 | .minheight = 1, | |
731 | }; | |
732 | struct video_capability *cap = arg; | |
733 | *cap = vcap; | |
734 | return 0; | |
735 | } | |
736 | case VIDIOCGCHAN: | |
737 | { | |
738 | struct video_channel *vch = arg; | |
739 | if(vch->channel != 0) // We only support one channel (#0) | |
740 | return -EINVAL; | |
741 | memset(vch,0,sizeof(*vch)); | |
742 | strcpy(vch->name, "CCD-input"); | |
743 | vch->type = VIDEO_TYPE_CAMERA; | |
744 | return 0; | |
745 | } | |
746 | case VIDIOCSCHAN: | |
747 | { | |
748 | struct video_channel *vch = arg; | |
749 | if(vch->channel != 0) | |
750 | return -EINVAL; | |
751 | return 0; | |
752 | } | |
753 | case VIDIOCGTUNER: | |
754 | { | |
755 | struct video_tuner *vtune = arg; | |
756 | if(vtune->tuner != 0) | |
757 | return -EINVAL; | |
758 | strcpy(vtune->name, "no tuner"); | |
759 | vtune->rangelow = 0; | |
760 | vtune->rangehigh = 0; | |
761 | vtune->flags = VIDEO_TUNER_NORM; | |
762 | vtune->mode = VIDEO_MODE_AUTO; | |
763 | vtune->signal = 0xffff; | |
764 | return 0; | |
765 | } | |
766 | case VIDIOCSTUNER: | |
767 | { | |
768 | struct video_tuner *vtune = arg; | |
769 | if (vtune->tuner != 0) | |
770 | return -EINVAL; | |
771 | if (vtune->mode != VIDEO_MODE_AUTO) | |
772 | return -EINVAL; | |
773 | return 0; | |
774 | } | |
775 | case VIDIOCGPICT: | |
776 | { | |
777 | struct video_picture vpic = { | |
778 | cam->brightness << 8, // brightness | |
779 | (cam->hue + 128) << 8, // hue | |
780 | cam->color << 9, // color | |
781 | cam->contrast << 9, // contrast | |
782 | 0x8000, // whiteness | |
783 | 16, VIDEO_PALETTE_YUV422// bpp, palette format | |
784 | }; | |
785 | struct video_picture *pic = arg; | |
786 | *pic = vpic; | |
787 | return 0; | |
788 | } | |
789 | case VIDIOCSPICT: | |
790 | { | |
791 | struct video_picture *vpic = arg; | |
792 | if (vpic->depth != 16 || vpic->palette != VIDEO_PALETTE_YUV422) | |
793 | return -EINVAL; | |
d56410e0 | 794 | |
1da177e4 LT |
795 | cam->brightness = vpic->brightness >> 8; |
796 | cam->hue = (vpic->hue >> 8) - 128; | |
797 | cam->color = vpic->colour >> 9; | |
798 | cam->contrast = vpic->contrast >> 9; | |
799 | ||
800 | w9966_pdev_claim(cam); | |
d56410e0 | 801 | |
1da177e4 LT |
802 | if ( |
803 | w9966_wReg_i2c(cam, 0x0a, cam->brightness) == -1 || | |
804 | w9966_wReg_i2c(cam, 0x0b, cam->contrast) == -1 || | |
805 | w9966_wReg_i2c(cam, 0x0c, cam->color) == -1 || | |
806 | w9966_wReg_i2c(cam, 0x0d, cam->hue) == -1 | |
807 | ) { | |
808 | w9966_pdev_release(cam); | |
809 | return -EIO; | |
810 | } | |
d56410e0 | 811 | |
1da177e4 LT |
812 | w9966_pdev_release(cam); |
813 | return 0; | |
814 | } | |
815 | case VIDIOCSWIN: | |
816 | { | |
817 | int ret; | |
818 | struct video_window *vwin = arg; | |
d56410e0 | 819 | |
1da177e4 LT |
820 | if (vwin->flags != 0) |
821 | return -EINVAL; | |
822 | if (vwin->clipcount != 0) | |
823 | return -EINVAL; | |
824 | if (vwin->width < 2 || vwin->width > W9966_WND_MAX_W) | |
d56410e0 | 825 | return -EINVAL; |
1da177e4 LT |
826 | if (vwin->height < 1 || vwin->height > W9966_WND_MAX_H) |
827 | return -EINVAL; | |
828 | ||
829 | // Update camera regs | |
830 | w9966_pdev_claim(cam); | |
831 | ret = w9966_setup(cam, 0, 0, 1023, 1023, vwin->width, vwin->height); | |
832 | w9966_pdev_release(cam); | |
d56410e0 | 833 | |
1da177e4 LT |
834 | if (ret != 0) { |
835 | DPRINTF("VIDIOCSWIN: w9966_setup() failed.\n"); | |
836 | return -EIO; | |
837 | } | |
d56410e0 | 838 | |
1da177e4 LT |
839 | return 0; |
840 | } | |
841 | case VIDIOCGWIN: | |
842 | { | |
843 | struct video_window *vwin = arg; | |
844 | memset(vwin, 0, sizeof(*vwin)); | |
845 | vwin->width = cam->width; | |
846 | vwin->height = cam->height; | |
847 | return 0; | |
848 | } | |
849 | // Unimplemented | |
d56410e0 | 850 | case VIDIOCCAPTURE: |
1da177e4 LT |
851 | case VIDIOCGFBUF: |
852 | case VIDIOCSFBUF: | |
853 | case VIDIOCKEY: | |
854 | case VIDIOCGFREQ: | |
855 | case VIDIOCSFREQ: | |
856 | case VIDIOCGAUDIO: | |
857 | case VIDIOCSAUDIO: | |
858 | return -EINVAL; | |
859 | default: | |
860 | return -ENOIOCTLCMD; | |
861 | } | |
862 | return 0; | |
863 | } | |
864 | ||
865 | static int w9966_v4l_ioctl(struct inode *inode, struct file *file, | |
866 | unsigned int cmd, unsigned long arg) | |
867 | { | |
868 | return video_usercopy(inode, file, cmd, arg, w9966_v4l_do_ioctl); | |
869 | } | |
870 | ||
871 | // Capture data | |
872 | static ssize_t w9966_v4l_read(struct file *file, char __user *buf, | |
873 | size_t count, loff_t *ppos) | |
874 | { | |
875 | struct video_device *vdev = video_devdata(file); | |
876 | struct w9966_dev *cam = vdev->priv; | |
877 | unsigned char addr = 0xa0; // ECP, read, CCD-transfer, 00000 | |
878 | unsigned char __user *dest = (unsigned char __user *)buf; | |
879 | unsigned long dleft = count; | |
880 | unsigned char *tbuf; | |
d56410e0 | 881 | |
1da177e4 LT |
882 | // Why would anyone want more than this?? |
883 | if (count > cam->width * cam->height * 2) | |
884 | return -EINVAL; | |
d56410e0 | 885 | |
1da177e4 LT |
886 | w9966_pdev_claim(cam); |
887 | w9966_wReg(cam, 0x00, 0x02); // Reset ECP-FIFO buffer | |
888 | w9966_wReg(cam, 0x00, 0x00); // Return to normal operation | |
889 | w9966_wReg(cam, 0x01, 0x98); // Enable capture | |
890 | ||
d56410e0 | 891 | // write special capture-addr and negotiate into data transfer |
1da177e4 LT |
892 | if ( |
893 | (parport_negotiate(cam->pport, cam->ppmode|IEEE1284_ADDR) != 0 )|| | |
894 | (parport_write(cam->pport, &addr, 1) != 1 )|| | |
895 | (parport_negotiate(cam->pport, cam->ppmode|IEEE1284_DATA) != 0 ) | |
896 | ) { | |
897 | w9966_pdev_release(cam); | |
898 | return -EFAULT; | |
899 | } | |
900 | ||
901 | tbuf = kmalloc(W9966_RBUFFER, GFP_KERNEL); | |
902 | if (tbuf == NULL) { | |
903 | count = -ENOMEM; | |
904 | goto out; | |
905 | } | |
906 | ||
907 | while(dleft > 0) | |
908 | { | |
909 | unsigned long tsize = (dleft > W9966_RBUFFER) ? W9966_RBUFFER : dleft; | |
d56410e0 | 910 | |
1da177e4 LT |
911 | if (parport_read(cam->pport, tbuf, tsize) < tsize) { |
912 | count = -EFAULT; | |
913 | goto out; | |
914 | } | |
915 | if (copy_to_user(dest, tbuf, tsize) != 0) { | |
916 | count = -EFAULT; | |
917 | goto out; | |
918 | } | |
919 | dest += tsize; | |
920 | dleft -= tsize; | |
921 | } | |
922 | ||
923 | w9966_wReg(cam, 0x01, 0x18); // Disable capture | |
924 | ||
925 | out: | |
926 | kfree(tbuf); | |
927 | w9966_pdev_release(cam); | |
928 | ||
929 | return count; | |
930 | } | |
931 | ||
932 | ||
933 | // Called once for every parport on init | |
934 | static void w9966_attach(struct parport *port) | |
935 | { | |
936 | int i; | |
d56410e0 | 937 | |
1da177e4 LT |
938 | for (i = 0; i < W9966_MAXCAMS; i++) |
939 | { | |
940 | if (w9966_cams[i].dev_state != 0) // Cam is already assigned | |
941 | continue; | |
942 | if ( | |
943 | strcmp(pardev[i], "aggressive") == 0 || | |
944 | strcmp(pardev[i], port->name) == 0 | |
945 | ) { | |
946 | if (w9966_init(&w9966_cams[i], port) != 0) | |
947 | w9966_term(&w9966_cams[i]); | |
948 | break; // return | |
949 | } | |
950 | } | |
951 | } | |
952 | ||
953 | // Called once for every parport on termination | |
954 | static void w9966_detach(struct parport *port) | |
955 | { | |
956 | int i; | |
957 | for (i = 0; i < W9966_MAXCAMS; i++) | |
958 | if (w9966_cams[i].dev_state != 0 && w9966_cams[i].pport == port) | |
959 | w9966_term(&w9966_cams[i]); | |
960 | } | |
961 | ||
962 | ||
963 | static struct parport_driver w9966_ppd = { | |
964 | .name = W9966_DRIVERNAME, | |
965 | .attach = w9966_attach, | |
966 | .detach = w9966_detach, | |
967 | }; | |
968 | ||
969 | // Module entry point | |
970 | static int __init w9966_mod_init(void) | |
971 | { | |
972 | int i; | |
973 | for (i = 0; i < W9966_MAXCAMS; i++) | |
974 | w9966_cams[i].dev_state = 0; | |
975 | ||
976 | return parport_register_driver(&w9966_ppd); | |
977 | } | |
978 | ||
979 | // Module cleanup | |
980 | static void __exit w9966_mod_term(void) | |
981 | { | |
982 | parport_unregister_driver(&w9966_ppd); | |
983 | } | |
984 | ||
985 | module_init(w9966_mod_init); | |
986 | module_exit(w9966_mod_term); |