Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Video4Linux Colour QuickCam driver | |
3 | * Copyright 1997-2000 Philip Blundell <philb@gnu.org> | |
4 | * | |
5 | * Module parameters: | |
6 | * | |
7 | * parport=auto -- probe all parports (default) | |
8 | * parport=0 -- parport0 becomes qcam1 | |
9 | * parport=2,0,1 -- parports 2,0,1 are tried in that order | |
10 | * | |
11 | * probe=0 -- do no probing, assume camera is present | |
12 | * probe=1 -- use IEEE-1284 autoprobe data only (default) | |
13 | * probe=2 -- probe aggressively for cameras | |
14 | * | |
15 | * force_rgb=1 -- force data format to RGB (default is BGR) | |
16 | * | |
17 | * The parport parameter controls which parports will be scanned. | |
18 | * Scanning all parports causes some printers to print a garbage page. | |
d56410e0 | 19 | * -- March 14, 1999 Billy Donahue <billy@escape.com> |
1da177e4 LT |
20 | * |
21 | * Fixed data format to BGR, added force_rgb parameter. Added missing | |
22 | * parport_unregister_driver() on module removal. | |
23 | * -- May 28, 2000 Claudio Matsuoka <claudio@conectiva.com> | |
24 | */ | |
25 | ||
26 | #include <linux/module.h> | |
27 | #include <linux/delay.h> | |
28 | #include <linux/errno.h> | |
29 | #include <linux/fs.h> | |
30 | #include <linux/init.h> | |
31 | #include <linux/kernel.h> | |
32 | #include <linux/slab.h> | |
33 | #include <linux/mm.h> | |
34 | #include <linux/parport.h> | |
35 | #include <linux/sched.h> | |
3593cab5 | 36 | #include <linux/mutex.h> |
168c626c | 37 | #include <linux/jiffies.h> |
d71964fb | 38 | #include <linux/videodev2.h> |
1da177e4 | 39 | #include <asm/uaccess.h> |
d71964fb HV |
40 | #include <media/v4l2-device.h> |
41 | #include <media/v4l2-common.h> | |
42 | #include <media/v4l2-ioctl.h> | |
34caed8b HV |
43 | #include <media/v4l2-fh.h> |
44 | #include <media/v4l2-ctrls.h> | |
45 | #include <media/v4l2-event.h> | |
1da177e4 | 46 | |
d71964fb HV |
47 | struct qcam { |
48 | struct v4l2_device v4l2_dev; | |
1da177e4 | 49 | struct video_device vdev; |
34caed8b | 50 | struct v4l2_ctrl_handler hdl; |
1da177e4 LT |
51 | struct pardevice *pdev; |
52 | struct parport *pport; | |
53 | int width, height; | |
54 | int ccd_width, ccd_height; | |
55 | int mode; | |
56 | int contrast, brightness, whitebal; | |
57 | int top, left; | |
58 | unsigned int bidirectional; | |
3593cab5 | 59 | struct mutex lock; |
1da177e4 LT |
60 | }; |
61 | ||
62 | /* cameras maximum */ | |
63 | #define MAX_CAMS 4 | |
64 | ||
65 | /* The three possible QuickCam modes */ | |
66 | #define QC_MILLIONS 0x18 | |
67 | #define QC_BILLIONS 0x10 | |
68 | #define QC_THOUSANDS 0x08 /* with VIDEC compression (not supported) */ | |
69 | ||
70 | /* The three possible decimations */ | |
71 | #define QC_DECIMATION_1 0 | |
72 | #define QC_DECIMATION_2 2 | |
73 | #define QC_DECIMATION_4 4 | |
74 | ||
d71964fb | 75 | #define BANNER "Colour QuickCam for Video4Linux v0.06" |
1da177e4 LT |
76 | |
77 | static int parport[MAX_CAMS] = { [1 ... MAX_CAMS-1] = -1 }; | |
78 | static int probe = 2; | |
90ab5ee9 | 79 | static bool force_rgb; |
1da177e4 LT |
80 | static int video_nr = -1; |
81 | ||
d71964fb HV |
82 | /* FIXME: parport=auto would never have worked, surely? --RR */ |
83 | MODULE_PARM_DESC(parport, "parport=<auto|n[,n]...> for port detection method\n" | |
84 | "probe=<0|1|2> for camera detection method\n" | |
85 | "force_rgb=<0|1> for RGB data format (default BGR)"); | |
86 | module_param_array(parport, int, NULL, 0); | |
87 | module_param(probe, int, 0); | |
88 | module_param(force_rgb, bool, 0); | |
89 | module_param(video_nr, int, 0); | |
90 | ||
91 | static struct qcam *qcams[MAX_CAMS]; | |
92 | static unsigned int num_cams; | |
93 | ||
94 | static inline void qcam_set_ack(struct qcam *qcam, unsigned int i) | |
1da177e4 LT |
95 | { |
96 | /* note: the QC specs refer to the PCAck pin by voltage, not | |
97 | software level. PC ports have builtin inverters. */ | |
51224aa4 | 98 | parport_frob_control(qcam->pport, 8, i ? 8 : 0); |
1da177e4 LT |
99 | } |
100 | ||
d71964fb | 101 | static inline unsigned int qcam_ready1(struct qcam *qcam) |
1da177e4 | 102 | { |
51224aa4 | 103 | return (parport_read_status(qcam->pport) & 0x8) ? 1 : 0; |
1da177e4 LT |
104 | } |
105 | ||
d71964fb | 106 | static inline unsigned int qcam_ready2(struct qcam *qcam) |
1da177e4 | 107 | { |
51224aa4 | 108 | return (parport_read_data(qcam->pport) & 0x1) ? 1 : 0; |
1da177e4 LT |
109 | } |
110 | ||
d71964fb | 111 | static unsigned int qcam_await_ready1(struct qcam *qcam, int value) |
1da177e4 | 112 | { |
d71964fb | 113 | struct v4l2_device *v4l2_dev = &qcam->v4l2_dev; |
1da177e4 LT |
114 | unsigned long oldjiffies = jiffies; |
115 | unsigned int i; | |
116 | ||
168c626c | 117 | for (oldjiffies = jiffies; |
51224aa4 | 118 | time_before(jiffies, oldjiffies + msecs_to_jiffies(40));) |
1da177e4 LT |
119 | if (qcam_ready1(qcam) == value) |
120 | return 0; | |
121 | ||
d56410e0 | 122 | /* If the camera didn't respond within 1/25 second, poll slowly |
1da177e4 | 123 | for a while. */ |
51224aa4 | 124 | for (i = 0; i < 50; i++) { |
1da177e4 LT |
125 | if (qcam_ready1(qcam) == value) |
126 | return 0; | |
127 | msleep_interruptible(100); | |
128 | } | |
129 | ||
130 | /* Probably somebody pulled the plug out. Not much we can do. */ | |
d71964fb | 131 | v4l2_err(v4l2_dev, "ready1 timeout (%d) %x %x\n", value, |
1da177e4 LT |
132 | parport_read_status(qcam->pport), |
133 | parport_read_control(qcam->pport)); | |
134 | return 1; | |
135 | } | |
136 | ||
d71964fb | 137 | static unsigned int qcam_await_ready2(struct qcam *qcam, int value) |
1da177e4 | 138 | { |
d71964fb | 139 | struct v4l2_device *v4l2_dev = &qcam->v4l2_dev; |
1da177e4 LT |
140 | unsigned long oldjiffies = jiffies; |
141 | unsigned int i; | |
142 | ||
168c626c | 143 | for (oldjiffies = jiffies; |
51224aa4 | 144 | time_before(jiffies, oldjiffies + msecs_to_jiffies(40));) |
1da177e4 LT |
145 | if (qcam_ready2(qcam) == value) |
146 | return 0; | |
147 | ||
d56410e0 | 148 | /* If the camera didn't respond within 1/25 second, poll slowly |
1da177e4 | 149 | for a while. */ |
51224aa4 | 150 | for (i = 0; i < 50; i++) { |
1da177e4 LT |
151 | if (qcam_ready2(qcam) == value) |
152 | return 0; | |
153 | msleep_interruptible(100); | |
154 | } | |
155 | ||
156 | /* Probably somebody pulled the plug out. Not much we can do. */ | |
d71964fb | 157 | v4l2_err(v4l2_dev, "ready2 timeout (%d) %x %x %x\n", value, |
1da177e4 LT |
158 | parport_read_status(qcam->pport), |
159 | parport_read_control(qcam->pport), | |
160 | parport_read_data(qcam->pport)); | |
161 | return 1; | |
162 | } | |
163 | ||
d71964fb | 164 | static int qcam_read_data(struct qcam *qcam) |
1da177e4 LT |
165 | { |
166 | unsigned int idata; | |
51224aa4 | 167 | |
1da177e4 | 168 | qcam_set_ack(qcam, 0); |
51224aa4 HV |
169 | if (qcam_await_ready1(qcam, 1)) |
170 | return -1; | |
1da177e4 LT |
171 | idata = parport_read_status(qcam->pport) & 0xf0; |
172 | qcam_set_ack(qcam, 1); | |
51224aa4 HV |
173 | if (qcam_await_ready1(qcam, 0)) |
174 | return -1; | |
175 | idata |= parport_read_status(qcam->pport) >> 4; | |
1da177e4 LT |
176 | return idata; |
177 | } | |
178 | ||
d71964fb | 179 | static int qcam_write_data(struct qcam *qcam, unsigned int data) |
1da177e4 | 180 | { |
d71964fb | 181 | struct v4l2_device *v4l2_dev = &qcam->v4l2_dev; |
1da177e4 | 182 | unsigned int idata; |
51224aa4 | 183 | |
1da177e4 LT |
184 | parport_write_data(qcam->pport, data); |
185 | idata = qcam_read_data(qcam); | |
51224aa4 | 186 | if (data != idata) { |
d71964fb | 187 | v4l2_warn(v4l2_dev, "sent %x but received %x\n", data, |
1da177e4 LT |
188 | idata); |
189 | return 1; | |
d56410e0 | 190 | } |
1da177e4 LT |
191 | return 0; |
192 | } | |
193 | ||
d71964fb | 194 | static inline int qcam_set(struct qcam *qcam, unsigned int cmd, unsigned int data) |
1da177e4 LT |
195 | { |
196 | if (qcam_write_data(qcam, cmd)) | |
197 | return -1; | |
198 | if (qcam_write_data(qcam, data)) | |
199 | return -1; | |
200 | return 0; | |
201 | } | |
202 | ||
d71964fb | 203 | static inline int qcam_get(struct qcam *qcam, unsigned int cmd) |
1da177e4 LT |
204 | { |
205 | if (qcam_write_data(qcam, cmd)) | |
206 | return -1; | |
207 | return qcam_read_data(qcam); | |
208 | } | |
209 | ||
d71964fb | 210 | static int qc_detect(struct qcam *qcam) |
1da177e4 LT |
211 | { |
212 | unsigned int stat, ostat, i, count = 0; | |
213 | ||
214 | /* The probe routine below is not very reliable. The IEEE-1284 | |
215 | probe takes precedence. */ | |
216 | /* XXX Currently parport provides no way to distinguish between | |
217 | "the IEEE probe was not done" and "the probe was done, but | |
218 | no device was found". Fix this one day. */ | |
219 | if (qcam->pport->probe_info[0].class == PARPORT_CLASS_MEDIA | |
220 | && qcam->pport->probe_info[0].model | |
d56410e0 | 221 | && !strcmp(qcam->pdev->port->probe_info[0].model, |
1da177e4 LT |
222 | "Color QuickCam 2.0")) { |
223 | printk(KERN_DEBUG "QuickCam: Found by IEEE1284 probe.\n"); | |
224 | return 1; | |
225 | } | |
d56410e0 | 226 | |
1da177e4 LT |
227 | if (probe < 2) |
228 | return 0; | |
229 | ||
230 | parport_write_control(qcam->pport, 0xc); | |
231 | ||
232 | /* look for a heartbeat */ | |
233 | ostat = stat = parport_read_status(qcam->pport); | |
51224aa4 | 234 | for (i = 0; i < 250; i++) { |
1da177e4 LT |
235 | mdelay(1); |
236 | stat = parport_read_status(qcam->pport); | |
51224aa4 HV |
237 | if (ostat != stat) { |
238 | if (++count >= 3) | |
239 | return 1; | |
1da177e4 LT |
240 | ostat = stat; |
241 | } | |
242 | } | |
243 | ||
244 | /* Reset the camera and try again */ | |
245 | parport_write_control(qcam->pport, 0xc); | |
246 | parport_write_control(qcam->pport, 0x8); | |
247 | mdelay(1); | |
248 | parport_write_control(qcam->pport, 0xc); | |
249 | mdelay(1); | |
250 | count = 0; | |
251 | ||
252 | ostat = stat = parport_read_status(qcam->pport); | |
51224aa4 | 253 | for (i = 0; i < 250; i++) { |
1da177e4 LT |
254 | mdelay(1); |
255 | stat = parport_read_status(qcam->pport); | |
51224aa4 HV |
256 | if (ostat != stat) { |
257 | if (++count >= 3) | |
258 | return 1; | |
1da177e4 LT |
259 | ostat = stat; |
260 | } | |
261 | } | |
262 | ||
263 | /* no (or flatline) camera, give up */ | |
264 | return 0; | |
265 | } | |
266 | ||
d71964fb | 267 | static void qc_reset(struct qcam *qcam) |
1da177e4 LT |
268 | { |
269 | parport_write_control(qcam->pport, 0xc); | |
270 | parport_write_control(qcam->pport, 0x8); | |
271 | mdelay(1); | |
272 | parport_write_control(qcam->pport, 0xc); | |
d56410e0 | 273 | mdelay(1); |
1da177e4 LT |
274 | } |
275 | ||
276 | /* Reset the QuickCam and program for brightness, contrast, | |
277 | * white-balance, and resolution. */ | |
278 | ||
d71964fb | 279 | static void qc_setup(struct qcam *qcam) |
1da177e4 | 280 | { |
d71964fb | 281 | qc_reset(qcam); |
1da177e4 | 282 | |
51224aa4 | 283 | /* Set the brightness. */ |
d71964fb | 284 | qcam_set(qcam, 11, qcam->brightness); |
1da177e4 LT |
285 | |
286 | /* Set the height and width. These refer to the actual | |
287 | CCD area *before* applying the selected decimation. */ | |
d71964fb HV |
288 | qcam_set(qcam, 17, qcam->ccd_height); |
289 | qcam_set(qcam, 19, qcam->ccd_width / 2); | |
1da177e4 LT |
290 | |
291 | /* Set top and left. */ | |
d71964fb HV |
292 | qcam_set(qcam, 0xd, qcam->top); |
293 | qcam_set(qcam, 0xf, qcam->left); | |
1da177e4 LT |
294 | |
295 | /* Set contrast and white balance. */ | |
d71964fb HV |
296 | qcam_set(qcam, 0x19, qcam->contrast); |
297 | qcam_set(qcam, 0x1f, qcam->whitebal); | |
d56410e0 | 298 | |
1da177e4 | 299 | /* Set the speed. */ |
d71964fb | 300 | qcam_set(qcam, 45, 2); |
1da177e4 LT |
301 | } |
302 | ||
d56410e0 | 303 | /* Read some bytes from the camera and put them in the buffer. |
1da177e4 LT |
304 | nbytes should be a multiple of 3, because bidirectional mode gives |
305 | us three bytes at a time. */ | |
306 | ||
d71964fb | 307 | static unsigned int qcam_read_bytes(struct qcam *qcam, unsigned char *buf, unsigned int nbytes) |
1da177e4 LT |
308 | { |
309 | unsigned int bytes = 0; | |
310 | ||
d71964fb HV |
311 | qcam_set_ack(qcam, 0); |
312 | if (qcam->bidirectional) { | |
1da177e4 | 313 | /* It's a bidirectional port */ |
51224aa4 | 314 | while (bytes < nbytes) { |
1da177e4 LT |
315 | unsigned int lo1, hi1, lo2, hi2; |
316 | unsigned char r, g, b; | |
317 | ||
d71964fb | 318 | if (qcam_await_ready2(qcam, 1)) |
51224aa4 | 319 | return bytes; |
d71964fb HV |
320 | lo1 = parport_read_data(qcam->pport) >> 1; |
321 | hi1 = ((parport_read_status(qcam->pport) >> 3) & 0x1f) ^ 0x10; | |
322 | qcam_set_ack(qcam, 1); | |
323 | if (qcam_await_ready2(qcam, 0)) | |
51224aa4 | 324 | return bytes; |
d71964fb HV |
325 | lo2 = parport_read_data(qcam->pport) >> 1; |
326 | hi2 = ((parport_read_status(qcam->pport) >> 3) & 0x1f) ^ 0x10; | |
327 | qcam_set_ack(qcam, 0); | |
51224aa4 HV |
328 | r = lo1 | ((hi1 & 1) << 7); |
329 | g = ((hi1 & 0x1e) << 3) | ((hi2 & 0x1e) >> 1); | |
330 | b = lo2 | ((hi2 & 1) << 7); | |
1da177e4 LT |
331 | if (force_rgb) { |
332 | buf[bytes++] = r; | |
333 | buf[bytes++] = g; | |
334 | buf[bytes++] = b; | |
335 | } else { | |
336 | buf[bytes++] = b; | |
337 | buf[bytes++] = g; | |
338 | buf[bytes++] = r; | |
339 | } | |
340 | } | |
51224aa4 | 341 | } else { |
1da177e4 LT |
342 | /* It's a unidirectional port */ |
343 | int i = 0, n = bytes; | |
344 | unsigned char rgb[3]; | |
345 | ||
51224aa4 | 346 | while (bytes < nbytes) { |
1da177e4 LT |
347 | unsigned int hi, lo; |
348 | ||
d71964fb | 349 | if (qcam_await_ready1(qcam, 1)) |
51224aa4 | 350 | return bytes; |
d71964fb HV |
351 | hi = (parport_read_status(qcam->pport) & 0xf0); |
352 | qcam_set_ack(qcam, 1); | |
353 | if (qcam_await_ready1(qcam, 0)) | |
51224aa4 | 354 | return bytes; |
d71964fb HV |
355 | lo = (parport_read_status(qcam->pport) & 0xf0); |
356 | qcam_set_ack(qcam, 0); | |
1da177e4 LT |
357 | /* flip some bits */ |
358 | rgb[(i = bytes++ % 3)] = (hi | (lo >> 4)) ^ 0x88; | |
359 | if (i >= 2) { | |
360 | get_fragment: | |
361 | if (force_rgb) { | |
362 | buf[n++] = rgb[0]; | |
363 | buf[n++] = rgb[1]; | |
364 | buf[n++] = rgb[2]; | |
365 | } else { | |
366 | buf[n++] = rgb[2]; | |
367 | buf[n++] = rgb[1]; | |
368 | buf[n++] = rgb[0]; | |
369 | } | |
370 | } | |
371 | } | |
372 | if (i) { | |
373 | i = 0; | |
374 | goto get_fragment; | |
375 | } | |
376 | } | |
377 | return bytes; | |
378 | } | |
379 | ||
380 | #define BUFSZ 150 | |
381 | ||
d71964fb | 382 | static long qc_capture(struct qcam *qcam, char __user *buf, unsigned long len) |
1da177e4 | 383 | { |
d71964fb | 384 | struct v4l2_device *v4l2_dev = &qcam->v4l2_dev; |
8173090a | 385 | unsigned lines, pixelsperline; |
d71964fb | 386 | unsigned int is_bi_dir = qcam->bidirectional; |
1da177e4 LT |
387 | size_t wantlen, outptr = 0; |
388 | char tmpbuf[BUFSZ]; | |
389 | ||
390 | if (!access_ok(VERIFY_WRITE, buf, len)) | |
391 | return -EFAULT; | |
392 | ||
393 | /* Wait for camera to become ready */ | |
51224aa4 | 394 | for (;;) { |
d71964fb | 395 | int i = qcam_get(qcam, 41); |
51224aa4 | 396 | |
1da177e4 | 397 | if (i == -1) { |
d71964fb | 398 | qc_setup(qcam); |
1da177e4 LT |
399 | return -EIO; |
400 | } | |
401 | if ((i & 0x80) == 0) | |
402 | break; | |
51224aa4 | 403 | schedule(); |
1da177e4 LT |
404 | } |
405 | ||
d71964fb | 406 | if (qcam_set(qcam, 7, (qcam->mode | (is_bi_dir ? 1 : 0)) + 1)) |
1da177e4 | 407 | return -EIO; |
d56410e0 | 408 | |
d71964fb HV |
409 | lines = qcam->height; |
410 | pixelsperline = qcam->width; | |
1da177e4 | 411 | |
51224aa4 | 412 | if (is_bi_dir) { |
1da177e4 | 413 | /* Turn the port around */ |
d71964fb | 414 | parport_data_reverse(qcam->pport); |
1da177e4 | 415 | mdelay(3); |
d71964fb HV |
416 | qcam_set_ack(qcam, 0); |
417 | if (qcam_await_ready1(qcam, 1)) { | |
418 | qc_setup(qcam); | |
1da177e4 LT |
419 | return -EIO; |
420 | } | |
d71964fb HV |
421 | qcam_set_ack(qcam, 1); |
422 | if (qcam_await_ready1(qcam, 0)) { | |
423 | qc_setup(qcam); | |
1da177e4 LT |
424 | return -EIO; |
425 | } | |
426 | } | |
427 | ||
428 | wantlen = lines * pixelsperline * 24 / 8; | |
429 | ||
51224aa4 | 430 | while (wantlen) { |
1da177e4 | 431 | size_t t, s; |
51224aa4 HV |
432 | |
433 | s = (wantlen > BUFSZ) ? BUFSZ : wantlen; | |
d71964fb | 434 | t = qcam_read_bytes(qcam, tmpbuf, s); |
51224aa4 | 435 | if (outptr < len) { |
1da177e4 | 436 | size_t sz = len - outptr; |
51224aa4 HV |
437 | |
438 | if (sz > t) | |
439 | sz = t; | |
440 | if (__copy_to_user(buf + outptr, tmpbuf, sz)) | |
1da177e4 LT |
441 | break; |
442 | outptr += sz; | |
443 | } | |
444 | wantlen -= t; | |
445 | if (t < s) | |
446 | break; | |
447 | cond_resched(); | |
448 | } | |
449 | ||
450 | len = outptr; | |
451 | ||
51224aa4 | 452 | if (wantlen) { |
d71964fb | 453 | v4l2_err(v4l2_dev, "short read.\n"); |
1da177e4 | 454 | if (is_bi_dir) |
d71964fb HV |
455 | parport_data_forward(qcam->pport); |
456 | qc_setup(qcam); | |
1da177e4 LT |
457 | return len; |
458 | } | |
459 | ||
51224aa4 | 460 | if (is_bi_dir) { |
1da177e4 | 461 | int l; |
51224aa4 | 462 | |
1da177e4 | 463 | do { |
d71964fb | 464 | l = qcam_read_bytes(qcam, tmpbuf, 3); |
1da177e4 LT |
465 | cond_resched(); |
466 | } while (l && (tmpbuf[0] == 0x7e || tmpbuf[1] == 0x7e || tmpbuf[2] == 0x7e)); | |
467 | if (force_rgb) { | |
468 | if (tmpbuf[0] != 0xe || tmpbuf[1] != 0x0 || tmpbuf[2] != 0xf) | |
d71964fb | 469 | v4l2_err(v4l2_dev, "bad EOF\n"); |
1da177e4 LT |
470 | } else { |
471 | if (tmpbuf[0] != 0xf || tmpbuf[1] != 0x0 || tmpbuf[2] != 0xe) | |
d71964fb | 472 | v4l2_err(v4l2_dev, "bad EOF\n"); |
1da177e4 | 473 | } |
d71964fb HV |
474 | qcam_set_ack(qcam, 0); |
475 | if (qcam_await_ready1(qcam, 1)) { | |
476 | v4l2_err(v4l2_dev, "no ack after EOF\n"); | |
477 | parport_data_forward(qcam->pport); | |
478 | qc_setup(qcam); | |
1da177e4 LT |
479 | return len; |
480 | } | |
d71964fb | 481 | parport_data_forward(qcam->pport); |
1da177e4 | 482 | mdelay(3); |
d71964fb HV |
483 | qcam_set_ack(qcam, 1); |
484 | if (qcam_await_ready1(qcam, 0)) { | |
485 | v4l2_err(v4l2_dev, "no ack to port turnaround\n"); | |
486 | qc_setup(qcam); | |
1da177e4 LT |
487 | return len; |
488 | } | |
51224aa4 | 489 | } else { |
1da177e4 | 490 | int l; |
51224aa4 | 491 | |
1da177e4 | 492 | do { |
d71964fb | 493 | l = qcam_read_bytes(qcam, tmpbuf, 1); |
1da177e4 LT |
494 | cond_resched(); |
495 | } while (l && tmpbuf[0] == 0x7e); | |
d71964fb | 496 | l = qcam_read_bytes(qcam, tmpbuf + 1, 2); |
1da177e4 LT |
497 | if (force_rgb) { |
498 | if (tmpbuf[0] != 0xe || tmpbuf[1] != 0x0 || tmpbuf[2] != 0xf) | |
d71964fb | 499 | v4l2_err(v4l2_dev, "bad EOF\n"); |
1da177e4 LT |
500 | } else { |
501 | if (tmpbuf[0] != 0xf || tmpbuf[1] != 0x0 || tmpbuf[2] != 0xe) | |
d71964fb | 502 | v4l2_err(v4l2_dev, "bad EOF\n"); |
1da177e4 LT |
503 | } |
504 | } | |
505 | ||
d71964fb | 506 | qcam_write_data(qcam, 0); |
1da177e4 LT |
507 | return len; |
508 | } | |
509 | ||
510 | /* | |
511 | * Video4linux interfacing | |
512 | */ | |
513 | ||
d71964fb HV |
514 | static int qcam_querycap(struct file *file, void *priv, |
515 | struct v4l2_capability *vcap) | |
1da177e4 | 516 | { |
d71964fb | 517 | struct qcam *qcam = video_drvdata(file); |
d56410e0 | 518 | |
d71964fb HV |
519 | strlcpy(vcap->driver, qcam->v4l2_dev.name, sizeof(vcap->driver)); |
520 | strlcpy(vcap->card, "Color Quickcam", sizeof(vcap->card)); | |
521 | strlcpy(vcap->bus_info, "parport", sizeof(vcap->bus_info)); | |
34caed8b HV |
522 | vcap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE; |
523 | vcap->capabilities = vcap->device_caps | V4L2_CAP_DEVICE_CAPS; | |
d71964fb HV |
524 | return 0; |
525 | } | |
51224aa4 | 526 | |
d71964fb HV |
527 | static int qcam_enum_input(struct file *file, void *fh, struct v4l2_input *vin) |
528 | { | |
529 | if (vin->index > 0) | |
530 | return -EINVAL; | |
531 | strlcpy(vin->name, "Camera", sizeof(vin->name)); | |
532 | vin->type = V4L2_INPUT_TYPE_CAMERA; | |
533 | vin->audioset = 0; | |
534 | vin->tuner = 0; | |
535 | vin->std = 0; | |
536 | vin->status = 0; | |
537 | return 0; | |
538 | } | |
51224aa4 | 539 | |
d71964fb HV |
540 | static int qcam_g_input(struct file *file, void *fh, unsigned int *inp) |
541 | { | |
542 | *inp = 0; | |
543 | return 0; | |
544 | } | |
545 | ||
546 | static int qcam_s_input(struct file *file, void *fh, unsigned int inp) | |
547 | { | |
548 | return (inp > 0) ? -EINVAL : 0; | |
549 | } | |
550 | ||
d71964fb HV |
551 | static int qcam_g_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt) |
552 | { | |
553 | struct qcam *qcam = video_drvdata(file); | |
554 | struct v4l2_pix_format *pix = &fmt->fmt.pix; | |
555 | ||
556 | pix->width = qcam->width; | |
557 | pix->height = qcam->height; | |
558 | pix->pixelformat = V4L2_PIX_FMT_RGB24; | |
559 | pix->field = V4L2_FIELD_NONE; | |
560 | pix->bytesperline = 3 * qcam->width; | |
561 | pix->sizeimage = 3 * qcam->width * qcam->height; | |
562 | /* Just a guess */ | |
563 | pix->colorspace = V4L2_COLORSPACE_SRGB; | |
564 | return 0; | |
565 | } | |
566 | ||
567 | static int qcam_try_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt) | |
568 | { | |
569 | struct v4l2_pix_format *pix = &fmt->fmt.pix; | |
570 | ||
571 | if (pix->height < 60 || pix->width < 80) { | |
572 | pix->height = 60; | |
573 | pix->width = 80; | |
574 | } else if (pix->height < 120 || pix->width < 160) { | |
575 | pix->height = 120; | |
576 | pix->width = 160; | |
577 | } else { | |
578 | pix->height = 240; | |
579 | pix->width = 320; | |
51224aa4 | 580 | } |
d71964fb HV |
581 | pix->pixelformat = V4L2_PIX_FMT_RGB24; |
582 | pix->field = V4L2_FIELD_NONE; | |
583 | pix->bytesperline = 3 * pix->width; | |
584 | pix->sizeimage = 3 * pix->width * pix->height; | |
585 | /* Just a guess */ | |
586 | pix->colorspace = V4L2_COLORSPACE_SRGB; | |
587 | return 0; | |
588 | } | |
589 | ||
590 | static int qcam_s_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt) | |
591 | { | |
592 | struct qcam *qcam = video_drvdata(file); | |
593 | struct v4l2_pix_format *pix = &fmt->fmt.pix; | |
594 | int ret = qcam_try_fmt_vid_cap(file, fh, fmt); | |
595 | ||
596 | if (ret) | |
597 | return ret; | |
598 | switch (pix->height) { | |
599 | case 60: | |
600 | qcam->mode = QC_DECIMATION_4; | |
601 | break; | |
602 | case 120: | |
603 | qcam->mode = QC_DECIMATION_2; | |
604 | break; | |
51224aa4 | 605 | default: |
d71964fb HV |
606 | qcam->mode = QC_DECIMATION_1; |
607 | break; | |
1da177e4 | 608 | } |
d71964fb HV |
609 | |
610 | mutex_lock(&qcam->lock); | |
611 | qcam->mode |= QC_MILLIONS; | |
612 | qcam->height = pix->height; | |
613 | qcam->width = pix->width; | |
614 | parport_claim_or_block(qcam->pdev); | |
615 | qc_setup(qcam); | |
616 | parport_release(qcam->pdev); | |
617 | mutex_unlock(&qcam->lock); | |
1da177e4 LT |
618 | return 0; |
619 | } | |
620 | ||
d71964fb | 621 | static int qcam_enum_fmt_vid_cap(struct file *file, void *fh, struct v4l2_fmtdesc *fmt) |
1da177e4 | 622 | { |
d71964fb HV |
623 | static struct v4l2_fmtdesc formats[] = { |
624 | { 0, 0, 0, | |
625 | "RGB 8:8:8", V4L2_PIX_FMT_RGB24, | |
626 | { 0, 0, 0, 0 } | |
627 | }, | |
628 | }; | |
629 | enum v4l2_buf_type type = fmt->type; | |
630 | ||
631 | if (fmt->index > 0) | |
632 | return -EINVAL; | |
633 | ||
634 | *fmt = formats[fmt->index]; | |
635 | fmt->type = type; | |
636 | return 0; | |
1da177e4 LT |
637 | } |
638 | ||
639 | static ssize_t qcam_read(struct file *file, char __user *buf, | |
640 | size_t count, loff_t *ppos) | |
641 | { | |
d71964fb | 642 | struct qcam *qcam = video_drvdata(file); |
1da177e4 LT |
643 | int len; |
644 | ||
3593cab5 | 645 | mutex_lock(&qcam->lock); |
1da177e4 LT |
646 | parport_claim_or_block(qcam->pdev); |
647 | /* Probably should have a semaphore against multiple users */ | |
51224aa4 | 648 | len = qc_capture(qcam, buf, count); |
1da177e4 | 649 | parport_release(qcam->pdev); |
3593cab5 | 650 | mutex_unlock(&qcam->lock); |
1da177e4 LT |
651 | return len; |
652 | } | |
653 | ||
34caed8b HV |
654 | static int qcam_s_ctrl(struct v4l2_ctrl *ctrl) |
655 | { | |
656 | struct qcam *qcam = | |
657 | container_of(ctrl->handler, struct qcam, hdl); | |
658 | int ret = 0; | |
659 | ||
660 | mutex_lock(&qcam->lock); | |
661 | switch (ctrl->id) { | |
662 | case V4L2_CID_BRIGHTNESS: | |
663 | qcam->brightness = ctrl->val; | |
664 | break; | |
665 | case V4L2_CID_CONTRAST: | |
666 | qcam->contrast = ctrl->val; | |
667 | break; | |
668 | case V4L2_CID_GAMMA: | |
669 | qcam->whitebal = ctrl->val; | |
670 | break; | |
671 | default: | |
672 | ret = -EINVAL; | |
673 | break; | |
674 | } | |
675 | if (ret == 0) { | |
676 | parport_claim_or_block(qcam->pdev); | |
677 | qc_setup(qcam); | |
678 | parport_release(qcam->pdev); | |
679 | } | |
680 | mutex_unlock(&qcam->lock); | |
681 | return ret; | |
682 | } | |
683 | ||
bec43661 | 684 | static const struct v4l2_file_operations qcam_fops = { |
1da177e4 | 685 | .owner = THIS_MODULE, |
34caed8b HV |
686 | .open = v4l2_fh_open, |
687 | .release = v4l2_fh_release, | |
688 | .poll = v4l2_ctrl_poll, | |
61df3c9b | 689 | .unlocked_ioctl = video_ioctl2, |
1da177e4 | 690 | .read = qcam_read, |
1da177e4 LT |
691 | }; |
692 | ||
d71964fb HV |
693 | static const struct v4l2_ioctl_ops qcam_ioctl_ops = { |
694 | .vidioc_querycap = qcam_querycap, | |
695 | .vidioc_g_input = qcam_g_input, | |
696 | .vidioc_s_input = qcam_s_input, | |
697 | .vidioc_enum_input = qcam_enum_input, | |
34caed8b | 698 | .vidioc_enum_fmt_vid_cap = qcam_enum_fmt_vid_cap, |
d71964fb HV |
699 | .vidioc_g_fmt_vid_cap = qcam_g_fmt_vid_cap, |
700 | .vidioc_s_fmt_vid_cap = qcam_s_fmt_vid_cap, | |
701 | .vidioc_try_fmt_vid_cap = qcam_try_fmt_vid_cap, | |
34caed8b HV |
702 | .vidioc_log_status = v4l2_ctrl_log_status, |
703 | .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, | |
704 | .vidioc_unsubscribe_event = v4l2_event_unsubscribe, | |
705 | }; | |
706 | ||
707 | static const struct v4l2_ctrl_ops qcam_ctrl_ops = { | |
708 | .s_ctrl = qcam_s_ctrl, | |
1da177e4 LT |
709 | }; |
710 | ||
711 | /* Initialize the QuickCam driver control structure. */ | |
712 | ||
d71964fb | 713 | static struct qcam *qcam_init(struct parport *port) |
1da177e4 | 714 | { |
d71964fb HV |
715 | struct qcam *qcam; |
716 | struct v4l2_device *v4l2_dev; | |
d56410e0 | 717 | |
d71964fb HV |
718 | qcam = kzalloc(sizeof(*qcam), GFP_KERNEL); |
719 | if (qcam == NULL) | |
1da177e4 LT |
720 | return NULL; |
721 | ||
d71964fb HV |
722 | v4l2_dev = &qcam->v4l2_dev; |
723 | strlcpy(v4l2_dev->name, "c-qcam", sizeof(v4l2_dev->name)); | |
724 | ||
725 | if (v4l2_device_register(NULL, v4l2_dev) < 0) { | |
726 | v4l2_err(v4l2_dev, "Could not register v4l2_device\n"); | |
ee893e9a | 727 | kfree(qcam); |
d71964fb HV |
728 | return NULL; |
729 | } | |
730 | ||
34caed8b HV |
731 | v4l2_ctrl_handler_init(&qcam->hdl, 3); |
732 | v4l2_ctrl_new_std(&qcam->hdl, &qcam_ctrl_ops, | |
733 | V4L2_CID_BRIGHTNESS, 0, 255, 1, 240); | |
734 | v4l2_ctrl_new_std(&qcam->hdl, &qcam_ctrl_ops, | |
735 | V4L2_CID_CONTRAST, 0, 255, 1, 192); | |
736 | v4l2_ctrl_new_std(&qcam->hdl, &qcam_ctrl_ops, | |
737 | V4L2_CID_GAMMA, 0, 255, 1, 128); | |
738 | if (qcam->hdl.error) { | |
739 | v4l2_err(v4l2_dev, "couldn't register controls\n"); | |
740 | v4l2_ctrl_handler_free(&qcam->hdl); | |
741 | kfree(qcam); | |
742 | return NULL; | |
743 | } | |
744 | ||
d71964fb HV |
745 | qcam->pport = port; |
746 | qcam->pdev = parport_register_device(port, "c-qcam", NULL, NULL, | |
1da177e4 LT |
747 | NULL, 0, NULL); |
748 | ||
d71964fb | 749 | qcam->bidirectional = (qcam->pport->modes & PARPORT_MODE_TRISTATE) ? 1 : 0; |
1da177e4 | 750 | |
d71964fb HV |
751 | if (qcam->pdev == NULL) { |
752 | v4l2_err(v4l2_dev, "couldn't register for %s.\n", port->name); | |
34caed8b | 753 | v4l2_ctrl_handler_free(&qcam->hdl); |
d71964fb | 754 | kfree(qcam); |
1da177e4 LT |
755 | return NULL; |
756 | } | |
d56410e0 | 757 | |
d71964fb HV |
758 | strlcpy(qcam->vdev.name, "Colour QuickCam", sizeof(qcam->vdev.name)); |
759 | qcam->vdev.v4l2_dev = v4l2_dev; | |
760 | qcam->vdev.fops = &qcam_fops; | |
761 | qcam->vdev.ioctl_ops = &qcam_ioctl_ops; | |
762 | qcam->vdev.release = video_device_release_empty; | |
34caed8b HV |
763 | qcam->vdev.ctrl_handler = &qcam->hdl; |
764 | set_bit(V4L2_FL_USE_FH_PRIO, &qcam->vdev.flags); | |
d71964fb HV |
765 | video_set_drvdata(&qcam->vdev, qcam); |
766 | ||
767 | mutex_init(&qcam->lock); | |
768 | qcam->width = qcam->ccd_width = 320; | |
769 | qcam->height = qcam->ccd_height = 240; | |
770 | qcam->mode = QC_MILLIONS | QC_DECIMATION_1; | |
771 | qcam->contrast = 192; | |
772 | qcam->brightness = 240; | |
773 | qcam->whitebal = 128; | |
774 | qcam->top = 1; | |
775 | qcam->left = 14; | |
776 | return qcam; | |
1da177e4 LT |
777 | } |
778 | ||
1da177e4 LT |
779 | static int init_cqcam(struct parport *port) |
780 | { | |
d71964fb HV |
781 | struct qcam *qcam; |
782 | struct v4l2_device *v4l2_dev; | |
1da177e4 | 783 | |
51224aa4 | 784 | if (parport[0] != -1) { |
1da177e4 LT |
785 | /* The user gave specific instructions */ |
786 | int i, found = 0; | |
51224aa4 HV |
787 | |
788 | for (i = 0; i < MAX_CAMS && parport[i] != -1; i++) { | |
1da177e4 LT |
789 | if (parport[0] == port->number) |
790 | found = 1; | |
791 | } | |
792 | if (!found) | |
793 | return -ENODEV; | |
794 | } | |
795 | ||
796 | if (num_cams == MAX_CAMS) | |
797 | return -ENOSPC; | |
798 | ||
799 | qcam = qcam_init(port); | |
51224aa4 | 800 | if (qcam == NULL) |
1da177e4 | 801 | return -ENODEV; |
d56410e0 | 802 | |
d71964fb HV |
803 | v4l2_dev = &qcam->v4l2_dev; |
804 | ||
1da177e4 LT |
805 | parport_claim_or_block(qcam->pdev); |
806 | ||
807 | qc_reset(qcam); | |
d56410e0 | 808 | |
51224aa4 | 809 | if (probe && qc_detect(qcam) == 0) { |
1da177e4 LT |
810 | parport_release(qcam->pdev); |
811 | parport_unregister_device(qcam->pdev); | |
812 | kfree(qcam); | |
813 | return -ENODEV; | |
814 | } | |
815 | ||
816 | qc_setup(qcam); | |
817 | ||
818 | parport_release(qcam->pdev); | |
d56410e0 | 819 | |
dc60de33 | 820 | if (video_register_device(&qcam->vdev, VFL_TYPE_GRABBER, video_nr) < 0) { |
d71964fb | 821 | v4l2_err(v4l2_dev, "Unable to register Colour QuickCam on %s\n", |
1da177e4 LT |
822 | qcam->pport->name); |
823 | parport_unregister_device(qcam->pdev); | |
824 | kfree(qcam); | |
825 | return -ENODEV; | |
826 | } | |
827 | ||
d71964fb | 828 | v4l2_info(v4l2_dev, "%s: Colour QuickCam found on %s\n", |
38c7c036 | 829 | video_device_node_name(&qcam->vdev), qcam->pport->name); |
d56410e0 | 830 | |
1da177e4 LT |
831 | qcams[num_cams++] = qcam; |
832 | ||
833 | return 0; | |
834 | } | |
835 | ||
d71964fb | 836 | static void close_cqcam(struct qcam *qcam) |
1da177e4 LT |
837 | { |
838 | video_unregister_device(&qcam->vdev); | |
34caed8b | 839 | v4l2_ctrl_handler_free(&qcam->hdl); |
1da177e4 LT |
840 | parport_unregister_device(qcam->pdev); |
841 | kfree(qcam); | |
842 | } | |
843 | ||
844 | static void cq_attach(struct parport *port) | |
845 | { | |
846 | init_cqcam(port); | |
847 | } | |
848 | ||
849 | static void cq_detach(struct parport *port) | |
850 | { | |
851 | /* Write this some day. */ | |
852 | } | |
853 | ||
854 | static struct parport_driver cqcam_driver = { | |
855 | .name = "cqcam", | |
856 | .attach = cq_attach, | |
857 | .detach = cq_detach, | |
858 | }; | |
859 | ||
51224aa4 | 860 | static int __init cqcam_init(void) |
1da177e4 | 861 | { |
d71964fb | 862 | printk(KERN_INFO BANNER "\n"); |
1da177e4 LT |
863 | |
864 | return parport_register_driver(&cqcam_driver); | |
865 | } | |
866 | ||
51224aa4 | 867 | static void __exit cqcam_cleanup(void) |
1da177e4 LT |
868 | { |
869 | unsigned int i; | |
870 | ||
871 | for (i = 0; i < num_cams; i++) | |
872 | close_cqcam(qcams[i]); | |
873 | ||
874 | parport_unregister_driver(&cqcam_driver); | |
875 | } | |
876 | ||
877 | MODULE_AUTHOR("Philip Blundell <philb@gnu.org>"); | |
878 | MODULE_DESCRIPTION(BANNER); | |
879 | MODULE_LICENSE("GPL"); | |
1990d50b | 880 | MODULE_VERSION("0.0.4"); |
1da177e4 | 881 | |
1da177e4 LT |
882 | module_init(cqcam_init); |
883 | module_exit(cqcam_cleanup); |