Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | Winbond w9966cf Webcam parport driver. | |
3 | ||
626e2acf | 4 | Version 0.33 |
1da177e4 LT |
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> | |
626e2acf | 60 | #include <linux/videodev2.h> |
5a0e3ad6 | 61 | #include <linux/slab.h> |
5e87efa3 | 62 | #include <media/v4l2-common.h> |
35ea11ff | 63 | #include <media/v4l2-ioctl.h> |
626e2acf | 64 | #include <media/v4l2-device.h> |
1da177e4 LT |
65 | #include <linux/parport.h> |
66 | ||
ff699e6b | 67 | /*#define DEBUG*/ /* Undef me for production */ |
1da177e4 LT |
68 | |
69 | #ifdef DEBUG | |
7e28adb2 | 70 | #define DPRINTF(x, a...) printk(KERN_DEBUG "W9966: %s(): "x, __func__ , ##a) |
1da177e4 LT |
71 | #else |
72 | #define DPRINTF(x...) | |
73 | #endif | |
74 | ||
75 | /* | |
76 | * Defines, simple typedefs etc. | |
77 | */ | |
78 | ||
79 | #define W9966_DRIVERNAME "W9966CF Webcam" | |
4bfdd586 HV |
80 | #define W9966_MAXCAMS 4 /* Maximum number of cameras */ |
81 | #define W9966_RBUFFER 2048 /* Read buffer (must be an even number) */ | |
82 | #define W9966_SRAMSIZE 131072 /* 128kb */ | |
83 | #define W9966_SRAMID 0x02 /* check w9966cf.pdf */ | |
1da177e4 | 84 | |
4bfdd586 | 85 | /* Empirically determined window limits */ |
1da177e4 LT |
86 | #define W9966_WND_MIN_X 16 |
87 | #define W9966_WND_MIN_Y 14 | |
88 | #define W9966_WND_MAX_X 705 | |
89 | #define W9966_WND_MAX_Y 253 | |
90 | #define W9966_WND_MAX_W (W9966_WND_MAX_X - W9966_WND_MIN_X) | |
91 | #define W9966_WND_MAX_H (W9966_WND_MAX_Y - W9966_WND_MIN_Y) | |
92 | ||
4bfdd586 | 93 | /* Keep track of our current state */ |
1da177e4 LT |
94 | #define W9966_STATE_PDEV 0x01 |
95 | #define W9966_STATE_CLAIMED 0x02 | |
96 | #define W9966_STATE_VDEV 0x04 | |
97 | ||
98 | #define W9966_I2C_W_ID 0x48 | |
99 | #define W9966_I2C_R_ID 0x49 | |
100 | #define W9966_I2C_R_DATA 0x08 | |
101 | #define W9966_I2C_R_CLOCK 0x04 | |
102 | #define W9966_I2C_W_DATA 0x02 | |
103 | #define W9966_I2C_W_CLOCK 0x01 | |
104 | ||
626e2acf HV |
105 | struct w9966 { |
106 | struct v4l2_device v4l2_dev; | |
1da177e4 LT |
107 | unsigned char dev_state; |
108 | unsigned char i2c_state; | |
109 | unsigned short ppmode; | |
4bfdd586 HV |
110 | struct parport *pport; |
111 | struct pardevice *pdev; | |
1da177e4 LT |
112 | struct video_device vdev; |
113 | unsigned short width; | |
114 | unsigned short height; | |
115 | unsigned char brightness; | |
116 | signed char contrast; | |
117 | signed char color; | |
118 | signed char hue; | |
626e2acf | 119 | struct mutex lock; |
1da177e4 LT |
120 | }; |
121 | ||
122 | /* | |
123 | * Module specific properties | |
124 | */ | |
125 | ||
126 | MODULE_AUTHOR("Jakob Kemi <jakob.kemi@post.utfors.se>"); | |
127 | MODULE_DESCRIPTION("Winbond w9966cf WebCam driver (0.32)"); | |
128 | MODULE_LICENSE("GPL"); | |
1990d50b | 129 | MODULE_VERSION("0.33.1"); |
1da177e4 LT |
130 | |
131 | #ifdef MODULE | |
4bfdd586 | 132 | static const char *pardev[] = {[0 ... W9966_MAXCAMS] = ""}; |
1da177e4 | 133 | #else |
4bfdd586 | 134 | static const char *pardev[] = {[0 ... W9966_MAXCAMS] = "aggressive"}; |
1da177e4 LT |
135 | #endif |
136 | module_param_array(pardev, charp, NULL, 0); | |
4bfdd586 | 137 | MODULE_PARM_DESC(pardev, "pardev: where to search for\n" |
c1f2b0f2 HV |
138 | "\teach camera. 'aggressive' means brute-force search.\n" |
139 | "\tEg: >pardev=parport3,aggressive,parport2,parport1< would assign\n" | |
140 | "\tcam 1 to parport3 and search every parport for cam 2 etc..."); | |
1da177e4 | 141 | |
ff699e6b | 142 | static int parmode; |
1da177e4 LT |
143 | module_param(parmode, int, 0); |
144 | MODULE_PARM_DESC(parmode, "parmode: transfer mode (0=auto, 1=ecp, 2=epp"); | |
145 | ||
146 | static int video_nr = -1; | |
147 | module_param(video_nr, int, 0); | |
148 | ||
626e2acf | 149 | static struct w9966 w9966_cams[W9966_MAXCAMS]; |
1da177e4 | 150 | |
1da177e4 LT |
151 | /* |
152 | * Private function defines | |
153 | */ | |
154 | ||
155 | ||
4bfdd586 | 156 | /* Set camera phase flags, so we know what to uninit when terminating */ |
626e2acf | 157 | static inline void w9966_set_state(struct w9966 *cam, int mask, int val) |
1da177e4 LT |
158 | { |
159 | cam->dev_state = (cam->dev_state & ~mask) ^ val; | |
160 | } | |
161 | ||
4bfdd586 | 162 | /* Get camera phase flags */ |
626e2acf | 163 | static inline int w9966_get_state(struct w9966 *cam, int mask, int val) |
1da177e4 LT |
164 | { |
165 | return ((cam->dev_state & mask) == val); | |
166 | } | |
167 | ||
4bfdd586 | 168 | /* Claim parport for ourself */ |
626e2acf | 169 | static void w9966_pdev_claim(struct w9966 *cam) |
1da177e4 | 170 | { |
c1f2b0f2 | 171 | if (w9966_get_state(cam, W9966_STATE_CLAIMED, W9966_STATE_CLAIMED)) |
1da177e4 LT |
172 | return; |
173 | parport_claim_or_block(cam->pdev); | |
c1f2b0f2 | 174 | w9966_set_state(cam, W9966_STATE_CLAIMED, W9966_STATE_CLAIMED); |
1da177e4 LT |
175 | } |
176 | ||
4bfdd586 | 177 | /* Release parport for others to use */ |
626e2acf | 178 | static void w9966_pdev_release(struct w9966 *cam) |
1da177e4 | 179 | { |
c1f2b0f2 | 180 | if (w9966_get_state(cam, W9966_STATE_CLAIMED, 0)) |
1da177e4 LT |
181 | return; |
182 | parport_release(cam->pdev); | |
c1f2b0f2 | 183 | w9966_set_state(cam, W9966_STATE_CLAIMED, 0); |
1da177e4 | 184 | } |
d56410e0 | 185 | |
4bfdd586 HV |
186 | /* Read register from W9966 interface-chip |
187 | Expects a claimed pdev | |
188 | -1 on error, else register data (byte) */ | |
626e2acf | 189 | static int w9966_read_reg(struct w9966 *cam, int reg) |
1da177e4 | 190 | { |
4bfdd586 | 191 | /* ECP, read, regtransfer, REG, REG, REG, REG, REG */ |
1da177e4 LT |
192 | const unsigned char addr = 0x80 | (reg & 0x1f); |
193 | unsigned char val; | |
d56410e0 | 194 | |
1da177e4 LT |
195 | if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_ADDR) != 0) |
196 | return -1; | |
197 | if (parport_write(cam->pport, &addr, 1) != 1) | |
198 | return -1; | |
199 | if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_DATA) != 0) | |
200 | return -1; | |
201 | if (parport_read(cam->pport, &val, 1) != 1) | |
202 | return -1; | |
203 | ||
204 | return val; | |
205 | } | |
206 | ||
4bfdd586 HV |
207 | /* Write register to W9966 interface-chip |
208 | Expects a claimed pdev | |
209 | -1 on error */ | |
626e2acf | 210 | static int w9966_write_reg(struct w9966 *cam, int reg, int data) |
1da177e4 | 211 | { |
4bfdd586 | 212 | /* ECP, write, regtransfer, REG, REG, REG, REG, REG */ |
1da177e4 LT |
213 | const unsigned char addr = 0xc0 | (reg & 0x1f); |
214 | const unsigned char val = data; | |
d56410e0 | 215 | |
1da177e4 LT |
216 | if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_ADDR) != 0) |
217 | return -1; | |
218 | if (parport_write(cam->pport, &addr, 1) != 1) | |
219 | return -1; | |
220 | if (parport_negotiate(cam->pport, cam->ppmode | IEEE1284_DATA) != 0) | |
221 | return -1; | |
222 | if (parport_write(cam->pport, &val, 1) != 1) | |
223 | return -1; | |
224 | ||
225 | return 0; | |
226 | } | |
227 | ||
271922c0 HV |
228 | /* |
229 | * Ugly and primitive i2c protocol functions | |
230 | */ | |
231 | ||
232 | /* Sets the data line on the i2c bus. | |
233 | Expects a claimed pdev. */ | |
626e2acf | 234 | static void w9966_i2c_setsda(struct w9966 *cam, int state) |
1da177e4 | 235 | { |
271922c0 HV |
236 | if (state) |
237 | cam->i2c_state |= W9966_I2C_W_DATA; | |
238 | else | |
239 | cam->i2c_state &= ~W9966_I2C_W_DATA; | |
d56410e0 | 240 | |
c1f2b0f2 | 241 | w9966_write_reg(cam, 0x18, cam->i2c_state); |
271922c0 HV |
242 | udelay(5); |
243 | } | |
1da177e4 | 244 | |
271922c0 HV |
245 | /* Get peripheral clock line |
246 | Expects a claimed pdev. */ | |
626e2acf | 247 | static int w9966_i2c_getscl(struct w9966 *cam) |
271922c0 | 248 | { |
c1f2b0f2 | 249 | const unsigned char state = w9966_read_reg(cam, 0x18); |
271922c0 HV |
250 | return ((state & W9966_I2C_R_CLOCK) > 0); |
251 | } | |
252 | ||
253 | /* Sets the clock line on the i2c bus. | |
254 | Expects a claimed pdev. -1 on error */ | |
626e2acf | 255 | static int w9966_i2c_setscl(struct w9966 *cam, int state) |
271922c0 HV |
256 | { |
257 | unsigned long timeout; | |
258 | ||
259 | if (state) | |
260 | cam->i2c_state |= W9966_I2C_W_CLOCK; | |
261 | else | |
262 | cam->i2c_state &= ~W9966_I2C_W_CLOCK; | |
263 | ||
c1f2b0f2 | 264 | w9966_write_reg(cam, 0x18, cam->i2c_state); |
271922c0 HV |
265 | udelay(5); |
266 | ||
267 | /* we go to high, we also expect the peripheral to ack. */ | |
268 | if (state) { | |
269 | timeout = jiffies + 100; | |
270 | while (!w9966_i2c_getscl(cam)) { | |
271 | if (time_after(jiffies, timeout)) | |
272 | return -1; | |
273 | } | |
1da177e4 | 274 | } |
271922c0 HV |
275 | return 0; |
276 | } | |
d56410e0 | 277 | |
271922c0 HV |
278 | #if 0 |
279 | /* Get peripheral data line | |
280 | Expects a claimed pdev. */ | |
626e2acf | 281 | static int w9966_i2c_getsda(struct w9966 *cam) |
271922c0 | 282 | { |
c1f2b0f2 | 283 | const unsigned char state = w9966_read_reg(cam, 0x18); |
271922c0 HV |
284 | return ((state & W9966_I2C_R_DATA) > 0); |
285 | } | |
286 | #endif | |
287 | ||
288 | /* Write a byte with ack to the i2c bus. | |
289 | Expects a claimed pdev. -1 on error */ | |
626e2acf | 290 | static int w9966_i2c_wbyte(struct w9966 *cam, int data) |
271922c0 HV |
291 | { |
292 | int i; | |
293 | ||
294 | for (i = 7; i >= 0; i--) { | |
295 | w9966_i2c_setsda(cam, (data >> i) & 0x01); | |
296 | ||
297 | if (w9966_i2c_setscl(cam, 1) == -1) | |
298 | return -1; | |
299 | w9966_i2c_setscl(cam, 0); | |
1da177e4 | 300 | } |
1da177e4 | 301 | |
271922c0 | 302 | w9966_i2c_setsda(cam, 1); |
d56410e0 | 303 | |
271922c0 | 304 | if (w9966_i2c_setscl(cam, 1) == -1) |
1da177e4 | 305 | return -1; |
271922c0 HV |
306 | w9966_i2c_setscl(cam, 0); |
307 | ||
308 | return 0; | |
309 | } | |
310 | ||
311 | /* Read a data byte with ack from the i2c-bus | |
312 | Expects a claimed pdev. -1 on error */ | |
313 | #if 0 | |
626e2acf | 314 | static int w9966_i2c_rbyte(struct w9966 *cam) |
271922c0 HV |
315 | { |
316 | unsigned char data = 0x00; | |
317 | int i; | |
318 | ||
319 | w9966_i2c_setsda(cam, 1); | |
320 | ||
321 | for (i = 0; i < 8; i++) { | |
322 | if (w9966_i2c_setscl(cam, 1) == -1) | |
323 | return -1; | |
324 | data = data << 1; | |
325 | if (w9966_i2c_getsda(cam)) | |
326 | data |= 0x01; | |
327 | ||
328 | w9966_i2c_setscl(cam, 0); | |
1da177e4 | 329 | } |
271922c0 HV |
330 | return data; |
331 | } | |
332 | #endif | |
1da177e4 | 333 | |
271922c0 HV |
334 | /* Read a register from the i2c device. |
335 | Expects claimed pdev. -1 on error */ | |
336 | #if 0 | |
626e2acf | 337 | static int w9966_read_reg_i2c(struct w9966 *cam, int reg) |
271922c0 HV |
338 | { |
339 | int data; | |
1da177e4 | 340 | |
271922c0 HV |
341 | w9966_i2c_setsda(cam, 0); |
342 | w9966_i2c_setscl(cam, 0); | |
1da177e4 | 343 | |
271922c0 HV |
344 | if (w9966_i2c_wbyte(cam, W9966_I2C_W_ID) == -1 || |
345 | w9966_i2c_wbyte(cam, reg) == -1) | |
1da177e4 | 346 | return -1; |
d56410e0 | 347 | |
271922c0 HV |
348 | w9966_i2c_setsda(cam, 1); |
349 | if (w9966_i2c_setscl(cam, 1) == -1) | |
350 | return -1; | |
351 | w9966_i2c_setsda(cam, 0); | |
352 | w9966_i2c_setscl(cam, 0); | |
d56410e0 | 353 | |
271922c0 HV |
354 | if (w9966_i2c_wbyte(cam, W9966_I2C_R_ID) == -1) |
355 | return -1; | |
356 | data = w9966_i2c_rbyte(cam); | |
357 | if (data == -1) | |
358 | return -1; | |
1da177e4 | 359 | |
271922c0 | 360 | w9966_i2c_setsda(cam, 0); |
1da177e4 | 361 | |
271922c0 HV |
362 | if (w9966_i2c_setscl(cam, 1) == -1) |
363 | return -1; | |
364 | w9966_i2c_setsda(cam, 1); | |
365 | ||
366 | return data; | |
367 | } | |
368 | #endif | |
369 | ||
370 | /* Write a register to the i2c device. | |
371 | Expects claimed pdev. -1 on error */ | |
626e2acf | 372 | static int w9966_write_reg_i2c(struct w9966 *cam, int reg, int data) |
1da177e4 | 373 | { |
271922c0 HV |
374 | w9966_i2c_setsda(cam, 0); |
375 | w9966_i2c_setscl(cam, 0); | |
1da177e4 | 376 | |
271922c0 | 377 | if (w9966_i2c_wbyte(cam, W9966_I2C_W_ID) == -1 || |
c1f2b0f2 HV |
378 | w9966_i2c_wbyte(cam, reg) == -1 || |
379 | w9966_i2c_wbyte(cam, data) == -1) | |
271922c0 | 380 | return -1; |
1da177e4 | 381 | |
271922c0 HV |
382 | w9966_i2c_setsda(cam, 0); |
383 | if (w9966_i2c_setscl(cam, 1) == -1) | |
384 | return -1; | |
385 | ||
386 | w9966_i2c_setsda(cam, 1); | |
1da177e4 | 387 | |
271922c0 HV |
388 | return 0; |
389 | } | |
1da177e4 | 390 | |
4bfdd586 HV |
391 | /* Find a good length for capture window (used both for W and H) |
392 | A bit ugly but pretty functional. The capture length | |
393 | have to match the downscale */ | |
1da177e4 LT |
394 | static int w9966_findlen(int near, int size, int maxlen) |
395 | { | |
396 | int bestlen = size; | |
397 | int besterr = abs(near - bestlen); | |
398 | int len; | |
399 | ||
4bfdd586 | 400 | for (len = size + 1; len < maxlen; len++) { |
1da177e4 | 401 | int err; |
4bfdd586 | 402 | if (((64 * size) % len) != 0) |
1da177e4 LT |
403 | continue; |
404 | ||
405 | err = abs(near - len); | |
406 | ||
4bfdd586 | 407 | /* Only continue as long as we keep getting better values */ |
1da177e4 LT |
408 | if (err > besterr) |
409 | break; | |
d56410e0 | 410 | |
1da177e4 LT |
411 | besterr = err; |
412 | bestlen = len; | |
413 | } | |
414 | ||
415 | return bestlen; | |
416 | } | |
417 | ||
4bfdd586 HV |
418 | /* Modify capture window (if necessary) |
419 | and calculate downscaling | |
420 | Return -1 on error */ | |
421 | static int w9966_calcscale(int size, int min, int max, int *beg, int *end, unsigned char *factor) | |
1da177e4 LT |
422 | { |
423 | int maxlen = max - min; | |
424 | int len = *end - *beg + 1; | |
425 | int newlen = w9966_findlen(len, size, maxlen); | |
d56410e0 | 426 | int err = newlen - len; |
1da177e4 | 427 | |
4bfdd586 | 428 | /* Check for bad format */ |
1da177e4 LT |
429 | if (newlen > maxlen || newlen < size) |
430 | return -1; | |
431 | ||
4bfdd586 HV |
432 | /* Set factor (6 bit fixed) */ |
433 | *factor = (64 * size) / newlen; | |
1da177e4 | 434 | if (*factor == 64) |
4bfdd586 | 435 | *factor = 0x00; /* downscale is disabled */ |
1da177e4 | 436 | else |
4bfdd586 | 437 | *factor |= 0x80; /* set downscale-enable bit */ |
1da177e4 | 438 | |
4bfdd586 | 439 | /* Modify old beginning and end */ |
1da177e4 LT |
440 | *beg -= err / 2; |
441 | *end += err - (err / 2); | |
442 | ||
4bfdd586 | 443 | /* Move window if outside borders */ |
1da177e4 LT |
444 | if (*beg < min) { |
445 | *end += min - *beg; | |
446 | *beg += min - *beg; | |
447 | } | |
448 | if (*end > max) { | |
449 | *beg -= *end - max; | |
450 | *end -= *end - max; | |
451 | } | |
452 | ||
453 | return 0; | |
454 | } | |
455 | ||
4bfdd586 HV |
456 | /* Setup the cameras capture window etc. |
457 | Expects a claimed pdev | |
458 | return -1 on error */ | |
626e2acf | 459 | static int w9966_setup(struct w9966 *cam, int x1, int y1, int x2, int y2, int w, int h) |
1da177e4 LT |
460 | { |
461 | unsigned int i; | |
462 | unsigned int enh_s, enh_e; | |
463 | unsigned char scale_x, scale_y; | |
464 | unsigned char regs[0x1c]; | |
465 | unsigned char saa7111_regs[] = { | |
466 | 0x21, 0x00, 0xd8, 0x23, 0x00, 0x80, 0x80, 0x00, | |
467 | 0x88, 0x10, 0x80, 0x40, 0x40, 0x00, 0x01, 0x00, | |
468 | 0x48, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
469 | 0x00, 0x00, 0x00, 0x71, 0xe7, 0x00, 0x00, 0xc0 | |
470 | }; | |
d56410e0 MCC |
471 | |
472 | ||
4bfdd586 | 473 | if (w * h * 2 > W9966_SRAMSIZE) { |
1da177e4 | 474 | DPRINTF("capture window exceeds SRAM size!.\n"); |
4bfdd586 | 475 | w = 200; h = 160; /* Pick default values */ |
1da177e4 LT |
476 | } |
477 | ||
478 | w &= ~0x1; | |
4bfdd586 HV |
479 | if (w < 2) |
480 | w = 2; | |
481 | if (h < 1) | |
482 | h = 1; | |
483 | if (w > W9966_WND_MAX_W) | |
484 | w = W9966_WND_MAX_W; | |
485 | if (h > W9966_WND_MAX_H) | |
486 | h = W9966_WND_MAX_H; | |
1da177e4 LT |
487 | |
488 | cam->width = w; | |
489 | cam->height = h; | |
490 | ||
d56410e0 | 491 | enh_s = 0; |
4bfdd586 HV |
492 | enh_e = w * h * 2; |
493 | ||
c1f2b0f2 | 494 | /* Modify capture window if necessary and calculate downscaling */ |
4bfdd586 | 495 | if (w9966_calcscale(w, W9966_WND_MIN_X, W9966_WND_MAX_X, &x1, &x2, &scale_x) != 0 || |
c1f2b0f2 | 496 | w9966_calcscale(h, W9966_WND_MIN_Y, W9966_WND_MAX_Y, &y1, &y2, &scale_y) != 0) |
4bfdd586 HV |
497 | return -1; |
498 | ||
499 | DPRINTF("%dx%d, x: %d<->%d, y: %d<->%d, sx: %d/64, sy: %d/64.\n", | |
c1f2b0f2 | 500 | w, h, x1, x2, y1, y2, scale_x & ~0x80, scale_y & ~0x80); |
4bfdd586 | 501 | |
c1f2b0f2 | 502 | /* Setup registers */ |
4bfdd586 HV |
503 | regs[0x00] = 0x00; /* Set normal operation */ |
504 | regs[0x01] = 0x18; /* Capture mode */ | |
505 | regs[0x02] = scale_y; /* V-scaling */ | |
506 | regs[0x03] = scale_x; /* H-scaling */ | |
507 | ||
508 | /* Capture window */ | |
509 | regs[0x04] = (x1 & 0x0ff); /* X-start (8 low bits) */ | |
510 | regs[0x05] = (x1 & 0x300)>>8; /* X-start (2 high bits) */ | |
511 | regs[0x06] = (y1 & 0x0ff); /* Y-start (8 low bits) */ | |
512 | regs[0x07] = (y1 & 0x300)>>8; /* Y-start (2 high bits) */ | |
513 | regs[0x08] = (x2 & 0x0ff); /* X-end (8 low bits) */ | |
514 | regs[0x09] = (x2 & 0x300)>>8; /* X-end (2 high bits) */ | |
515 | regs[0x0a] = (y2 & 0x0ff); /* Y-end (8 low bits) */ | |
516 | ||
517 | regs[0x0c] = W9966_SRAMID; /* SRAM-banks (1x 128kb) */ | |
518 | ||
519 | /* Enhancement layer */ | |
520 | regs[0x0d] = (enh_s & 0x000ff); /* Enh. start (0-7) */ | |
521 | regs[0x0e] = (enh_s & 0x0ff00) >> 8; /* Enh. start (8-15) */ | |
522 | regs[0x0f] = (enh_s & 0x70000) >> 16; /* Enh. start (16-17/18??) */ | |
523 | regs[0x10] = (enh_e & 0x000ff); /* Enh. end (0-7) */ | |
524 | regs[0x11] = (enh_e & 0x0ff00) >> 8; /* Enh. end (8-15) */ | |
525 | regs[0x12] = (enh_e & 0x70000) >> 16; /* Enh. end (16-17/18??) */ | |
526 | ||
527 | /* Misc */ | |
528 | regs[0x13] = 0x40; /* VEE control (raw 4:2:2) */ | |
529 | regs[0x17] = 0x00; /* ??? */ | |
530 | regs[0x18] = cam->i2c_state = 0x00; /* Serial bus */ | |
531 | regs[0x19] = 0xff; /* I/O port direction control */ | |
532 | regs[0x1a] = 0xff; /* I/O port data register */ | |
533 | regs[0x1b] = 0x10; /* ??? */ | |
534 | ||
535 | /* SAA7111 chip settings */ | |
1da177e4 LT |
536 | saa7111_regs[0x0a] = cam->brightness; |
537 | saa7111_regs[0x0b] = cam->contrast; | |
538 | saa7111_regs[0x0c] = cam->color; | |
539 | saa7111_regs[0x0d] = cam->hue; | |
540 | ||
c1f2b0f2 HV |
541 | /* Reset (ECP-fifo & serial-bus) */ |
542 | if (w9966_write_reg(cam, 0x00, 0x03) == -1) | |
1da177e4 LT |
543 | return -1; |
544 | ||
c1f2b0f2 | 545 | /* Write regs to w9966cf chip */ |
1da177e4 | 546 | for (i = 0; i < 0x1c; i++) |
c1f2b0f2 | 547 | if (w9966_write_reg(cam, i, regs[i]) == -1) |
1da177e4 LT |
548 | return -1; |
549 | ||
c1f2b0f2 | 550 | /* Write regs to saa7111 chip */ |
1da177e4 | 551 | for (i = 0; i < 0x20; i++) |
c1f2b0f2 | 552 | if (w9966_write_reg_i2c(cam, i, saa7111_regs[i]) == -1) |
1da177e4 LT |
553 | return -1; |
554 | ||
555 | return 0; | |
556 | } | |
557 | ||
558 | /* | |
271922c0 | 559 | * Video4linux interfacing |
1da177e4 LT |
560 | */ |
561 | ||
626e2acf HV |
562 | static int cam_querycap(struct file *file, void *priv, |
563 | struct v4l2_capability *vcap) | |
564 | { | |
565 | struct w9966 *cam = video_drvdata(file); | |
566 | ||
567 | strlcpy(vcap->driver, cam->v4l2_dev.name, sizeof(vcap->driver)); | |
568 | strlcpy(vcap->card, W9966_DRIVERNAME, sizeof(vcap->card)); | |
569 | strlcpy(vcap->bus_info, "parport", sizeof(vcap->bus_info)); | |
626e2acf HV |
570 | vcap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE; |
571 | return 0; | |
572 | } | |
573 | ||
574 | static int cam_enum_input(struct file *file, void *fh, struct v4l2_input *vin) | |
575 | { | |
576 | if (vin->index > 0) | |
1da177e4 | 577 | return -EINVAL; |
626e2acf HV |
578 | strlcpy(vin->name, "Camera", sizeof(vin->name)); |
579 | vin->type = V4L2_INPUT_TYPE_CAMERA; | |
580 | vin->audioset = 0; | |
581 | vin->tuner = 0; | |
582 | vin->std = 0; | |
583 | vin->status = 0; | |
584 | return 0; | |
585 | } | |
586 | ||
587 | static int cam_g_input(struct file *file, void *fh, unsigned int *inp) | |
588 | { | |
589 | *inp = 0; | |
590 | return 0; | |
591 | } | |
592 | ||
593 | static int cam_s_input(struct file *file, void *fh, unsigned int inp) | |
594 | { | |
595 | return (inp > 0) ? -EINVAL : 0; | |
596 | } | |
597 | ||
598 | static int cam_queryctrl(struct file *file, void *priv, | |
599 | struct v4l2_queryctrl *qc) | |
600 | { | |
601 | switch (qc->id) { | |
602 | case V4L2_CID_BRIGHTNESS: | |
603 | return v4l2_ctrl_query_fill(qc, 0, 255, 1, 128); | |
604 | case V4L2_CID_CONTRAST: | |
605 | return v4l2_ctrl_query_fill(qc, -64, 64, 1, 64); | |
606 | case V4L2_CID_SATURATION: | |
607 | return v4l2_ctrl_query_fill(qc, -64, 64, 1, 64); | |
608 | case V4L2_CID_HUE: | |
609 | return v4l2_ctrl_query_fill(qc, -128, 127, 1, 0); | |
610 | } | |
611 | return -EINVAL; | |
612 | } | |
613 | ||
614 | static int cam_g_ctrl(struct file *file, void *priv, | |
615 | struct v4l2_control *ctrl) | |
616 | { | |
617 | struct w9966 *cam = video_drvdata(file); | |
618 | int ret = 0; | |
619 | ||
620 | switch (ctrl->id) { | |
621 | case V4L2_CID_BRIGHTNESS: | |
622 | ctrl->value = cam->brightness; | |
623 | break; | |
624 | case V4L2_CID_CONTRAST: | |
625 | ctrl->value = cam->contrast; | |
626 | break; | |
627 | case V4L2_CID_SATURATION: | |
628 | ctrl->value = cam->color; | |
629 | break; | |
630 | case V4L2_CID_HUE: | |
631 | ctrl->value = cam->hue; | |
632 | break; | |
1da177e4 | 633 | default: |
626e2acf HV |
634 | ret = -EINVAL; |
635 | break; | |
1da177e4 | 636 | } |
626e2acf HV |
637 | return ret; |
638 | } | |
639 | ||
640 | static int cam_s_ctrl(struct file *file, void *priv, | |
641 | struct v4l2_control *ctrl) | |
642 | { | |
643 | struct w9966 *cam = video_drvdata(file); | |
644 | int ret = 0; | |
645 | ||
646 | mutex_lock(&cam->lock); | |
647 | switch (ctrl->id) { | |
648 | case V4L2_CID_BRIGHTNESS: | |
649 | cam->brightness = ctrl->value; | |
650 | break; | |
651 | case V4L2_CID_CONTRAST: | |
652 | cam->contrast = ctrl->value; | |
653 | break; | |
654 | case V4L2_CID_SATURATION: | |
655 | cam->color = ctrl->value; | |
656 | break; | |
657 | case V4L2_CID_HUE: | |
658 | cam->hue = ctrl->value; | |
659 | break; | |
660 | default: | |
661 | ret = -EINVAL; | |
662 | break; | |
663 | } | |
664 | ||
665 | if (ret == 0) { | |
666 | w9966_pdev_claim(cam); | |
667 | ||
668 | if (w9966_write_reg_i2c(cam, 0x0a, cam->brightness) == -1 || | |
669 | w9966_write_reg_i2c(cam, 0x0b, cam->contrast) == -1 || | |
670 | w9966_write_reg_i2c(cam, 0x0c, cam->color) == -1 || | |
671 | w9966_write_reg_i2c(cam, 0x0d, cam->hue) == -1) { | |
672 | ret = -EIO; | |
673 | } | |
674 | ||
675 | w9966_pdev_release(cam); | |
676 | } | |
677 | mutex_unlock(&cam->lock); | |
678 | return ret; | |
679 | } | |
680 | ||
681 | static int cam_g_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt) | |
682 | { | |
683 | struct w9966 *cam = video_drvdata(file); | |
684 | struct v4l2_pix_format *pix = &fmt->fmt.pix; | |
685 | ||
686 | pix->width = cam->width; | |
687 | pix->height = cam->height; | |
688 | pix->pixelformat = V4L2_PIX_FMT_YUYV; | |
689 | pix->field = V4L2_FIELD_NONE; | |
690 | pix->bytesperline = 2 * cam->width; | |
691 | pix->sizeimage = 2 * cam->width * cam->height; | |
692 | /* Just a guess */ | |
693 | pix->colorspace = V4L2_COLORSPACE_SMPTE170M; | |
1da177e4 LT |
694 | return 0; |
695 | } | |
696 | ||
626e2acf | 697 | static int cam_try_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt) |
1da177e4 | 698 | { |
626e2acf HV |
699 | struct v4l2_pix_format *pix = &fmt->fmt.pix; |
700 | ||
701 | if (pix->width < 2) | |
702 | pix->width = 2; | |
703 | if (pix->height < 1) | |
704 | pix->height = 1; | |
705 | if (pix->width > W9966_WND_MAX_W) | |
706 | pix->width = W9966_WND_MAX_W; | |
707 | if (pix->height > W9966_WND_MAX_H) | |
708 | pix->height = W9966_WND_MAX_H; | |
709 | pix->pixelformat = V4L2_PIX_FMT_YUYV; | |
710 | pix->field = V4L2_FIELD_NONE; | |
711 | pix->bytesperline = 2 * pix->width; | |
712 | pix->sizeimage = 2 * pix->width * pix->height; | |
713 | /* Just a guess */ | |
714 | pix->colorspace = V4L2_COLORSPACE_SMPTE170M; | |
715 | return 0; | |
716 | } | |
717 | ||
718 | static int cam_s_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt) | |
719 | { | |
720 | struct w9966 *cam = video_drvdata(file); | |
721 | struct v4l2_pix_format *pix = &fmt->fmt.pix; | |
722 | int ret = cam_try_fmt_vid_cap(file, fh, fmt); | |
723 | ||
724 | if (ret) | |
725 | return ret; | |
726 | ||
727 | mutex_lock(&cam->lock); | |
728 | /* Update camera regs */ | |
729 | w9966_pdev_claim(cam); | |
730 | ret = w9966_setup(cam, 0, 0, 1023, 1023, pix->width, pix->height); | |
731 | w9966_pdev_release(cam); | |
732 | mutex_unlock(&cam->lock); | |
733 | return ret; | |
734 | } | |
735 | ||
736 | static int cam_enum_fmt_vid_cap(struct file *file, void *fh, struct v4l2_fmtdesc *fmt) | |
737 | { | |
738 | static struct v4l2_fmtdesc formats[] = { | |
739 | { 0, 0, 0, | |
740 | "YUV 4:2:2", V4L2_PIX_FMT_YUYV, | |
741 | { 0, 0, 0, 0 } | |
742 | }, | |
743 | }; | |
744 | enum v4l2_buf_type type = fmt->type; | |
745 | ||
746 | if (fmt->index > 0) | |
747 | return -EINVAL; | |
748 | ||
749 | *fmt = formats[fmt->index]; | |
750 | fmt->type = type; | |
751 | return 0; | |
1da177e4 LT |
752 | } |
753 | ||
4bfdd586 | 754 | /* Capture data */ |
1da177e4 | 755 | static ssize_t w9966_v4l_read(struct file *file, char __user *buf, |
c1f2b0f2 | 756 | size_t count, loff_t *ppos) |
1da177e4 | 757 | { |
626e2acf | 758 | struct w9966 *cam = video_drvdata(file); |
4bfdd586 | 759 | unsigned char addr = 0xa0; /* ECP, read, CCD-transfer, 00000 */ |
1da177e4 LT |
760 | unsigned char __user *dest = (unsigned char __user *)buf; |
761 | unsigned long dleft = count; | |
762 | unsigned char *tbuf; | |
d56410e0 | 763 | |
4bfdd586 | 764 | /* Why would anyone want more than this?? */ |
1da177e4 LT |
765 | if (count > cam->width * cam->height * 2) |
766 | return -EINVAL; | |
d56410e0 | 767 | |
626e2acf | 768 | mutex_lock(&cam->lock); |
1da177e4 | 769 | w9966_pdev_claim(cam); |
c1f2b0f2 HV |
770 | w9966_write_reg(cam, 0x00, 0x02); /* Reset ECP-FIFO buffer */ |
771 | w9966_write_reg(cam, 0x00, 0x00); /* Return to normal operation */ | |
772 | w9966_write_reg(cam, 0x01, 0x98); /* Enable capture */ | |
4bfdd586 HV |
773 | |
774 | /* write special capture-addr and negotiate into data transfer */ | |
775 | if ((parport_negotiate(cam->pport, cam->ppmode|IEEE1284_ADDR) != 0) || | |
c1f2b0f2 HV |
776 | (parport_write(cam->pport, &addr, 1) != 1) || |
777 | (parport_negotiate(cam->pport, cam->ppmode|IEEE1284_DATA) != 0)) { | |
1da177e4 | 778 | w9966_pdev_release(cam); |
626e2acf | 779 | mutex_unlock(&cam->lock); |
1da177e4 LT |
780 | return -EFAULT; |
781 | } | |
782 | ||
783 | tbuf = kmalloc(W9966_RBUFFER, GFP_KERNEL); | |
784 | if (tbuf == NULL) { | |
785 | count = -ENOMEM; | |
786 | goto out; | |
787 | } | |
788 | ||
4bfdd586 | 789 | while (dleft > 0) { |
1da177e4 | 790 | unsigned long tsize = (dleft > W9966_RBUFFER) ? W9966_RBUFFER : dleft; |
d56410e0 | 791 | |
1da177e4 LT |
792 | if (parport_read(cam->pport, tbuf, tsize) < tsize) { |
793 | count = -EFAULT; | |
794 | goto out; | |
795 | } | |
796 | if (copy_to_user(dest, tbuf, tsize) != 0) { | |
797 | count = -EFAULT; | |
798 | goto out; | |
799 | } | |
800 | dest += tsize; | |
801 | dleft -= tsize; | |
802 | } | |
803 | ||
c1f2b0f2 | 804 | w9966_write_reg(cam, 0x01, 0x18); /* Disable capture */ |
1da177e4 LT |
805 | |
806 | out: | |
807 | kfree(tbuf); | |
808 | w9966_pdev_release(cam); | |
626e2acf | 809 | mutex_unlock(&cam->lock); |
1da177e4 LT |
810 | |
811 | return count; | |
812 | } | |
813 | ||
271922c0 HV |
814 | static const struct v4l2_file_operations w9966_fops = { |
815 | .owner = THIS_MODULE, | |
61df3c9b | 816 | .unlocked_ioctl = video_ioctl2, |
271922c0 HV |
817 | .read = w9966_v4l_read, |
818 | }; | |
819 | ||
626e2acf HV |
820 | static const struct v4l2_ioctl_ops w9966_ioctl_ops = { |
821 | .vidioc_querycap = cam_querycap, | |
822 | .vidioc_g_input = cam_g_input, | |
823 | .vidioc_s_input = cam_s_input, | |
824 | .vidioc_enum_input = cam_enum_input, | |
825 | .vidioc_queryctrl = cam_queryctrl, | |
826 | .vidioc_g_ctrl = cam_g_ctrl, | |
827 | .vidioc_s_ctrl = cam_s_ctrl, | |
828 | .vidioc_enum_fmt_vid_cap = cam_enum_fmt_vid_cap, | |
829 | .vidioc_g_fmt_vid_cap = cam_g_fmt_vid_cap, | |
830 | .vidioc_s_fmt_vid_cap = cam_s_fmt_vid_cap, | |
831 | .vidioc_try_fmt_vid_cap = cam_try_fmt_vid_cap, | |
271922c0 HV |
832 | }; |
833 | ||
834 | ||
835 | /* Initialize camera device. Setup all internal flags, set a | |
836 | default video mode, setup ccd-chip, register v4l device etc.. | |
837 | Also used for 'probing' of hardware. | |
838 | -1 on error */ | |
626e2acf | 839 | static int w9966_init(struct w9966 *cam, struct parport *port) |
271922c0 | 840 | { |
626e2acf HV |
841 | struct v4l2_device *v4l2_dev = &cam->v4l2_dev; |
842 | ||
271922c0 HV |
843 | if (cam->dev_state != 0) |
844 | return -1; | |
845 | ||
626e2acf HV |
846 | strlcpy(v4l2_dev->name, "w9966", sizeof(v4l2_dev->name)); |
847 | ||
848 | if (v4l2_device_register(NULL, v4l2_dev) < 0) { | |
849 | v4l2_err(v4l2_dev, "Could not register v4l2_device\n"); | |
850 | return -1; | |
851 | } | |
271922c0 HV |
852 | cam->pport = port; |
853 | cam->brightness = 128; | |
854 | cam->contrast = 64; | |
855 | cam->color = 64; | |
856 | cam->hue = 0; | |
857 | ||
c1f2b0f2 | 858 | /* Select requested transfer mode */ |
271922c0 HV |
859 | switch (parmode) { |
860 | default: /* Auto-detect (priority: hw-ecp, hw-epp, sw-ecp) */ | |
861 | case 0: | |
862 | if (port->modes & PARPORT_MODE_ECP) | |
863 | cam->ppmode = IEEE1284_MODE_ECP; | |
864 | else if (port->modes & PARPORT_MODE_EPP) | |
865 | cam->ppmode = IEEE1284_MODE_EPP; | |
866 | else | |
867 | cam->ppmode = IEEE1284_MODE_ECP; | |
868 | break; | |
869 | case 1: /* hw- or sw-ecp */ | |
870 | cam->ppmode = IEEE1284_MODE_ECP; | |
871 | break; | |
872 | case 2: /* hw- or sw-epp */ | |
873 | cam->ppmode = IEEE1284_MODE_EPP; | |
c1f2b0f2 | 874 | break; |
271922c0 HV |
875 | } |
876 | ||
c1f2b0f2 | 877 | /* Tell the parport driver that we exists */ |
271922c0 HV |
878 | cam->pdev = parport_register_device(port, "w9966", NULL, NULL, NULL, 0, NULL); |
879 | if (cam->pdev == NULL) { | |
880 | DPRINTF("parport_register_device() failed\n"); | |
881 | return -1; | |
882 | } | |
c1f2b0f2 | 883 | w9966_set_state(cam, W9966_STATE_PDEV, W9966_STATE_PDEV); |
271922c0 HV |
884 | |
885 | w9966_pdev_claim(cam); | |
886 | ||
c1f2b0f2 | 887 | /* Setup a default capture mode */ |
271922c0 HV |
888 | if (w9966_setup(cam, 0, 0, 1023, 1023, 200, 160) != 0) { |
889 | DPRINTF("w9966_setup() failed.\n"); | |
890 | return -1; | |
891 | } | |
892 | ||
893 | w9966_pdev_release(cam); | |
894 | ||
c1f2b0f2 | 895 | /* Fill in the video_device struct and register us to v4l */ |
626e2acf HV |
896 | strlcpy(cam->vdev.name, W9966_DRIVERNAME, sizeof(cam->vdev.name)); |
897 | cam->vdev.v4l2_dev = v4l2_dev; | |
898 | cam->vdev.fops = &w9966_fops; | |
899 | cam->vdev.ioctl_ops = &w9966_ioctl_ops; | |
900 | cam->vdev.release = video_device_release_empty; | |
271922c0 HV |
901 | video_set_drvdata(&cam->vdev, cam); |
902 | ||
626e2acf HV |
903 | mutex_init(&cam->lock); |
904 | ||
271922c0 HV |
905 | if (video_register_device(&cam->vdev, VFL_TYPE_GRABBER, video_nr) < 0) |
906 | return -1; | |
907 | ||
c1f2b0f2 | 908 | w9966_set_state(cam, W9966_STATE_VDEV, W9966_STATE_VDEV); |
271922c0 HV |
909 | |
910 | /* All ok */ | |
626e2acf | 911 | v4l2_info(v4l2_dev, "Found and initialized a webcam on %s.\n", |
c1f2b0f2 | 912 | cam->pport->name); |
271922c0 HV |
913 | return 0; |
914 | } | |
915 | ||
916 | ||
917 | /* Terminate everything gracefully */ | |
626e2acf | 918 | static void w9966_term(struct w9966 *cam) |
271922c0 | 919 | { |
c1f2b0f2 HV |
920 | /* Unregister from v4l */ |
921 | if (w9966_get_state(cam, W9966_STATE_VDEV, W9966_STATE_VDEV)) { | |
271922c0 | 922 | video_unregister_device(&cam->vdev); |
c1f2b0f2 | 923 | w9966_set_state(cam, W9966_STATE_VDEV, 0); |
271922c0 HV |
924 | } |
925 | ||
c1f2b0f2 HV |
926 | /* Terminate from IEEE1284 mode and release pdev block */ |
927 | if (w9966_get_state(cam, W9966_STATE_PDEV, W9966_STATE_PDEV)) { | |
271922c0 HV |
928 | w9966_pdev_claim(cam); |
929 | parport_negotiate(cam->pport, IEEE1284_MODE_COMPAT); | |
930 | w9966_pdev_release(cam); | |
931 | } | |
932 | ||
c1f2b0f2 HV |
933 | /* Unregister from parport */ |
934 | if (w9966_get_state(cam, W9966_STATE_PDEV, W9966_STATE_PDEV)) { | |
271922c0 | 935 | parport_unregister_device(cam->pdev); |
c1f2b0f2 | 936 | w9966_set_state(cam, W9966_STATE_PDEV, 0); |
271922c0 | 937 | } |
bd5ba3ba | 938 | memset(cam, 0, sizeof(*cam)); |
271922c0 HV |
939 | } |
940 | ||
1da177e4 | 941 | |
4bfdd586 | 942 | /* Called once for every parport on init */ |
1da177e4 LT |
943 | static void w9966_attach(struct parport *port) |
944 | { | |
945 | int i; | |
d56410e0 | 946 | |
4bfdd586 HV |
947 | for (i = 0; i < W9966_MAXCAMS; i++) { |
948 | if (w9966_cams[i].dev_state != 0) /* Cam is already assigned */ | |
1da177e4 | 949 | continue; |
4bfdd586 | 950 | if (strcmp(pardev[i], "aggressive") == 0 || strcmp(pardev[i], port->name) == 0) { |
1da177e4 | 951 | if (w9966_init(&w9966_cams[i], port) != 0) |
4bfdd586 HV |
952 | w9966_term(&w9966_cams[i]); |
953 | break; /* return */ | |
1da177e4 LT |
954 | } |
955 | } | |
956 | } | |
957 | ||
4bfdd586 | 958 | /* Called once for every parport on termination */ |
1da177e4 LT |
959 | static void w9966_detach(struct parport *port) |
960 | { | |
961 | int i; | |
4bfdd586 | 962 | |
1da177e4 | 963 | for (i = 0; i < W9966_MAXCAMS; i++) |
4bfdd586 HV |
964 | if (w9966_cams[i].dev_state != 0 && w9966_cams[i].pport == port) |
965 | w9966_term(&w9966_cams[i]); | |
1da177e4 LT |
966 | } |
967 | ||
968 | ||
969 | static struct parport_driver w9966_ppd = { | |
970 | .name = W9966_DRIVERNAME, | |
971 | .attach = w9966_attach, | |
972 | .detach = w9966_detach, | |
973 | }; | |
974 | ||
4bfdd586 | 975 | /* Module entry point */ |
1da177e4 LT |
976 | static int __init w9966_mod_init(void) |
977 | { | |
978 | int i; | |
4bfdd586 | 979 | |
1da177e4 LT |
980 | for (i = 0; i < W9966_MAXCAMS; i++) |
981 | w9966_cams[i].dev_state = 0; | |
982 | ||
983 | return parport_register_driver(&w9966_ppd); | |
984 | } | |
985 | ||
4bfdd586 | 986 | /* Module cleanup */ |
1da177e4 LT |
987 | static void __exit w9966_mod_term(void) |
988 | { | |
989 | parport_unregister_driver(&w9966_ppd); | |
990 | } | |
991 | ||
992 | module_init(w9966_mod_init); | |
993 | module_exit(w9966_mod_term); |