Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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. |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 19 | * -- March 14, 1999 Billy Donahue <billy@escape.com> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
| 36 | #include <linux/videodev.h> |
Mauro Carvalho Chehab | 5e87efa | 2006-06-05 10:26:32 -0300 | [diff] [blame] | 37 | #include <media/v4l2-common.h> |
Hans Verkuil | 35ea11f | 2008-07-20 08:12:02 -0300 | [diff] [blame] | 38 | #include <media/v4l2-ioctl.h> |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 39 | #include <linux/mutex.h> |
Julia Lawall | 168c626 | 2008-04-16 16:13:15 -0300 | [diff] [blame] | 40 | #include <linux/jiffies.h> |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 41 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | #include <asm/uaccess.h> |
| 43 | |
| 44 | struct qcam_device { |
| 45 | struct video_device vdev; |
| 46 | struct pardevice *pdev; |
| 47 | struct parport *pport; |
| 48 | int width, height; |
| 49 | int ccd_width, ccd_height; |
| 50 | int mode; |
| 51 | int contrast, brightness, whitebal; |
| 52 | int top, left; |
| 53 | unsigned int bidirectional; |
Hans Verkuil | 7d43cd5 | 2008-08-23 05:31:47 -0300 | [diff] [blame] | 54 | unsigned long in_use; |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 55 | struct mutex lock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | }; |
| 57 | |
| 58 | /* cameras maximum */ |
| 59 | #define MAX_CAMS 4 |
| 60 | |
| 61 | /* The three possible QuickCam modes */ |
| 62 | #define QC_MILLIONS 0x18 |
| 63 | #define QC_BILLIONS 0x10 |
| 64 | #define QC_THOUSANDS 0x08 /* with VIDEC compression (not supported) */ |
| 65 | |
| 66 | /* The three possible decimations */ |
| 67 | #define QC_DECIMATION_1 0 |
| 68 | #define QC_DECIMATION_2 2 |
| 69 | #define QC_DECIMATION_4 4 |
| 70 | |
| 71 | #define BANNER "Colour QuickCam for Video4Linux v0.05" |
| 72 | |
| 73 | static int parport[MAX_CAMS] = { [1 ... MAX_CAMS-1] = -1 }; |
| 74 | static int probe = 2; |
Douglas Schilling Landgraf | ff699e6 | 2008-04-22 14:41:48 -0300 | [diff] [blame] | 75 | static int force_rgb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | static int video_nr = -1; |
| 77 | |
| 78 | static inline void qcam_set_ack(struct qcam_device *qcam, unsigned int i) |
| 79 | { |
| 80 | /* note: the QC specs refer to the PCAck pin by voltage, not |
| 81 | software level. PC ports have builtin inverters. */ |
| 82 | parport_frob_control(qcam->pport, 8, i?8:0); |
| 83 | } |
| 84 | |
| 85 | static inline unsigned int qcam_ready1(struct qcam_device *qcam) |
| 86 | { |
| 87 | return (parport_read_status(qcam->pport) & 0x8)?1:0; |
| 88 | } |
| 89 | |
| 90 | static inline unsigned int qcam_ready2(struct qcam_device *qcam) |
| 91 | { |
| 92 | return (parport_read_data(qcam->pport) & 0x1)?1:0; |
| 93 | } |
| 94 | |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 95 | static unsigned int qcam_await_ready1(struct qcam_device *qcam, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | int value) |
| 97 | { |
| 98 | unsigned long oldjiffies = jiffies; |
| 99 | unsigned int i; |
| 100 | |
Julia Lawall | 168c626 | 2008-04-16 16:13:15 -0300 | [diff] [blame] | 101 | for (oldjiffies = jiffies; |
| 102 | time_before(jiffies, oldjiffies + msecs_to_jiffies(40)); ) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | if (qcam_ready1(qcam) == value) |
| 104 | return 0; |
| 105 | |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 106 | /* If the camera didn't respond within 1/25 second, poll slowly |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | for a while. */ |
| 108 | for (i = 0; i < 50; i++) |
| 109 | { |
| 110 | if (qcam_ready1(qcam) == value) |
| 111 | return 0; |
| 112 | msleep_interruptible(100); |
| 113 | } |
| 114 | |
| 115 | /* Probably somebody pulled the plug out. Not much we can do. */ |
| 116 | printk(KERN_ERR "c-qcam: ready1 timeout (%d) %x %x\n", value, |
| 117 | parport_read_status(qcam->pport), |
| 118 | parport_read_control(qcam->pport)); |
| 119 | return 1; |
| 120 | } |
| 121 | |
| 122 | static unsigned int qcam_await_ready2(struct qcam_device *qcam, int value) |
| 123 | { |
| 124 | unsigned long oldjiffies = jiffies; |
| 125 | unsigned int i; |
| 126 | |
Julia Lawall | 168c626 | 2008-04-16 16:13:15 -0300 | [diff] [blame] | 127 | for (oldjiffies = jiffies; |
| 128 | time_before(jiffies, oldjiffies + msecs_to_jiffies(40)); ) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | if (qcam_ready2(qcam) == value) |
| 130 | return 0; |
| 131 | |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 132 | /* If the camera didn't respond within 1/25 second, poll slowly |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | for a while. */ |
| 134 | for (i = 0; i < 50; i++) |
| 135 | { |
| 136 | if (qcam_ready2(qcam) == value) |
| 137 | return 0; |
| 138 | msleep_interruptible(100); |
| 139 | } |
| 140 | |
| 141 | /* Probably somebody pulled the plug out. Not much we can do. */ |
| 142 | printk(KERN_ERR "c-qcam: ready2 timeout (%d) %x %x %x\n", value, |
| 143 | parport_read_status(qcam->pport), |
| 144 | parport_read_control(qcam->pport), |
| 145 | parport_read_data(qcam->pport)); |
| 146 | return 1; |
| 147 | } |
| 148 | |
| 149 | static int qcam_read_data(struct qcam_device *qcam) |
| 150 | { |
| 151 | unsigned int idata; |
| 152 | qcam_set_ack(qcam, 0); |
| 153 | if (qcam_await_ready1(qcam, 1)) return -1; |
| 154 | idata = parport_read_status(qcam->pport) & 0xf0; |
| 155 | qcam_set_ack(qcam, 1); |
| 156 | if (qcam_await_ready1(qcam, 0)) return -1; |
| 157 | idata |= (parport_read_status(qcam->pport) >> 4); |
| 158 | return idata; |
| 159 | } |
| 160 | |
| 161 | static int qcam_write_data(struct qcam_device *qcam, unsigned int data) |
| 162 | { |
| 163 | unsigned int idata; |
| 164 | parport_write_data(qcam->pport, data); |
| 165 | idata = qcam_read_data(qcam); |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 166 | if (data != idata) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | { |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 168 | printk(KERN_WARNING "cqcam: sent %x but received %x\n", data, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | idata); |
| 170 | return 1; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 171 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | return 0; |
| 173 | } |
| 174 | |
| 175 | static inline int qcam_set(struct qcam_device *qcam, unsigned int cmd, unsigned int data) |
| 176 | { |
| 177 | if (qcam_write_data(qcam, cmd)) |
| 178 | return -1; |
| 179 | if (qcam_write_data(qcam, data)) |
| 180 | return -1; |
| 181 | return 0; |
| 182 | } |
| 183 | |
| 184 | static inline int qcam_get(struct qcam_device *qcam, unsigned int cmd) |
| 185 | { |
| 186 | if (qcam_write_data(qcam, cmd)) |
| 187 | return -1; |
| 188 | return qcam_read_data(qcam); |
| 189 | } |
| 190 | |
| 191 | static int qc_detect(struct qcam_device *qcam) |
| 192 | { |
| 193 | unsigned int stat, ostat, i, count = 0; |
| 194 | |
| 195 | /* The probe routine below is not very reliable. The IEEE-1284 |
| 196 | probe takes precedence. */ |
| 197 | /* XXX Currently parport provides no way to distinguish between |
| 198 | "the IEEE probe was not done" and "the probe was done, but |
| 199 | no device was found". Fix this one day. */ |
| 200 | if (qcam->pport->probe_info[0].class == PARPORT_CLASS_MEDIA |
| 201 | && qcam->pport->probe_info[0].model |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 202 | && !strcmp(qcam->pdev->port->probe_info[0].model, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | "Color QuickCam 2.0")) { |
| 204 | printk(KERN_DEBUG "QuickCam: Found by IEEE1284 probe.\n"); |
| 205 | return 1; |
| 206 | } |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 207 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | if (probe < 2) |
| 209 | return 0; |
| 210 | |
| 211 | parport_write_control(qcam->pport, 0xc); |
| 212 | |
| 213 | /* look for a heartbeat */ |
| 214 | ostat = stat = parport_read_status(qcam->pport); |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 215 | for (i=0; i<250; i++) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | { |
| 217 | mdelay(1); |
| 218 | stat = parport_read_status(qcam->pport); |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 219 | if (ostat != stat) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | { |
| 221 | if (++count >= 3) return 1; |
| 222 | ostat = stat; |
| 223 | } |
| 224 | } |
| 225 | |
| 226 | /* Reset the camera and try again */ |
| 227 | parport_write_control(qcam->pport, 0xc); |
| 228 | parport_write_control(qcam->pport, 0x8); |
| 229 | mdelay(1); |
| 230 | parport_write_control(qcam->pport, 0xc); |
| 231 | mdelay(1); |
| 232 | count = 0; |
| 233 | |
| 234 | ostat = stat = parport_read_status(qcam->pport); |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 235 | for (i=0; i<250; i++) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | { |
| 237 | mdelay(1); |
| 238 | stat = parport_read_status(qcam->pport); |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 239 | if (ostat != stat) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | { |
| 241 | if (++count >= 3) return 1; |
| 242 | ostat = stat; |
| 243 | } |
| 244 | } |
| 245 | |
| 246 | /* no (or flatline) camera, give up */ |
| 247 | return 0; |
| 248 | } |
| 249 | |
| 250 | static void qc_reset(struct qcam_device *qcam) |
| 251 | { |
| 252 | parport_write_control(qcam->pport, 0xc); |
| 253 | parport_write_control(qcam->pport, 0x8); |
| 254 | mdelay(1); |
| 255 | parport_write_control(qcam->pport, 0xc); |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 256 | mdelay(1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | } |
| 258 | |
| 259 | /* Reset the QuickCam and program for brightness, contrast, |
| 260 | * white-balance, and resolution. */ |
| 261 | |
| 262 | static void qc_setup(struct qcam_device *q) |
| 263 | { |
| 264 | qc_reset(q); |
| 265 | |
| 266 | /* Set the brightness. */ |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 267 | qcam_set(q, 11, q->brightness); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | |
| 269 | /* Set the height and width. These refer to the actual |
| 270 | CCD area *before* applying the selected decimation. */ |
| 271 | qcam_set(q, 17, q->ccd_height); |
| 272 | qcam_set(q, 19, q->ccd_width / 2); |
| 273 | |
| 274 | /* Set top and left. */ |
| 275 | qcam_set(q, 0xd, q->top); |
| 276 | qcam_set(q, 0xf, q->left); |
| 277 | |
| 278 | /* Set contrast and white balance. */ |
| 279 | qcam_set(q, 0x19, q->contrast); |
| 280 | qcam_set(q, 0x1f, q->whitebal); |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 281 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | /* Set the speed. */ |
| 283 | qcam_set(q, 45, 2); |
| 284 | } |
| 285 | |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 286 | /* Read some bytes from the camera and put them in the buffer. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | nbytes should be a multiple of 3, because bidirectional mode gives |
| 288 | us three bytes at a time. */ |
| 289 | |
| 290 | static unsigned int qcam_read_bytes(struct qcam_device *q, unsigned char *buf, unsigned int nbytes) |
| 291 | { |
| 292 | unsigned int bytes = 0; |
| 293 | |
| 294 | qcam_set_ack(q, 0); |
| 295 | if (q->bidirectional) |
| 296 | { |
| 297 | /* It's a bidirectional port */ |
| 298 | while (bytes < nbytes) |
| 299 | { |
| 300 | unsigned int lo1, hi1, lo2, hi2; |
| 301 | unsigned char r, g, b; |
| 302 | |
| 303 | if (qcam_await_ready2(q, 1)) return bytes; |
| 304 | lo1 = parport_read_data(q->pport) >> 1; |
| 305 | hi1 = ((parport_read_status(q->pport) >> 3) & 0x1f) ^ 0x10; |
| 306 | qcam_set_ack(q, 1); |
| 307 | if (qcam_await_ready2(q, 0)) return bytes; |
| 308 | lo2 = parport_read_data(q->pport) >> 1; |
| 309 | hi2 = ((parport_read_status(q->pport) >> 3) & 0x1f) ^ 0x10; |
| 310 | qcam_set_ack(q, 0); |
| 311 | r = (lo1 | ((hi1 & 1)<<7)); |
| 312 | g = ((hi1 & 0x1e)<<3) | ((hi2 & 0x1e)>>1); |
| 313 | b = (lo2 | ((hi2 & 1)<<7)); |
| 314 | if (force_rgb) { |
| 315 | buf[bytes++] = r; |
| 316 | buf[bytes++] = g; |
| 317 | buf[bytes++] = b; |
| 318 | } else { |
| 319 | buf[bytes++] = b; |
| 320 | buf[bytes++] = g; |
| 321 | buf[bytes++] = r; |
| 322 | } |
| 323 | } |
| 324 | } |
| 325 | else |
| 326 | { |
| 327 | /* It's a unidirectional port */ |
| 328 | int i = 0, n = bytes; |
| 329 | unsigned char rgb[3]; |
| 330 | |
| 331 | while (bytes < nbytes) |
| 332 | { |
| 333 | unsigned int hi, lo; |
| 334 | |
| 335 | if (qcam_await_ready1(q, 1)) return bytes; |
| 336 | hi = (parport_read_status(q->pport) & 0xf0); |
| 337 | qcam_set_ack(q, 1); |
| 338 | if (qcam_await_ready1(q, 0)) return bytes; |
| 339 | lo = (parport_read_status(q->pport) & 0xf0); |
| 340 | qcam_set_ack(q, 0); |
| 341 | /* flip some bits */ |
| 342 | rgb[(i = bytes++ % 3)] = (hi | (lo >> 4)) ^ 0x88; |
| 343 | if (i >= 2) { |
| 344 | get_fragment: |
| 345 | if (force_rgb) { |
| 346 | buf[n++] = rgb[0]; |
| 347 | buf[n++] = rgb[1]; |
| 348 | buf[n++] = rgb[2]; |
| 349 | } else { |
| 350 | buf[n++] = rgb[2]; |
| 351 | buf[n++] = rgb[1]; |
| 352 | buf[n++] = rgb[0]; |
| 353 | } |
| 354 | } |
| 355 | } |
| 356 | if (i) { |
| 357 | i = 0; |
| 358 | goto get_fragment; |
| 359 | } |
| 360 | } |
| 361 | return bytes; |
| 362 | } |
| 363 | |
| 364 | #define BUFSZ 150 |
| 365 | |
| 366 | static long qc_capture(struct qcam_device *q, char __user *buf, unsigned long len) |
| 367 | { |
| 368 | unsigned lines, pixelsperline, bitsperxfer; |
| 369 | unsigned int is_bi_dir = q->bidirectional; |
| 370 | size_t wantlen, outptr = 0; |
| 371 | char tmpbuf[BUFSZ]; |
| 372 | |
| 373 | if (!access_ok(VERIFY_WRITE, buf, len)) |
| 374 | return -EFAULT; |
| 375 | |
| 376 | /* Wait for camera to become ready */ |
| 377 | for (;;) |
| 378 | { |
| 379 | int i = qcam_get(q, 41); |
| 380 | if (i == -1) { |
| 381 | qc_setup(q); |
| 382 | return -EIO; |
| 383 | } |
| 384 | if ((i & 0x80) == 0) |
| 385 | break; |
| 386 | else |
| 387 | schedule(); |
| 388 | } |
| 389 | |
| 390 | if (qcam_set(q, 7, (q->mode | (is_bi_dir?1:0)) + 1)) |
| 391 | return -EIO; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 392 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | lines = q->height; |
| 394 | pixelsperline = q->width; |
| 395 | bitsperxfer = (is_bi_dir) ? 24 : 8; |
| 396 | |
| 397 | if (is_bi_dir) |
| 398 | { |
| 399 | /* Turn the port around */ |
| 400 | parport_data_reverse(q->pport); |
| 401 | mdelay(3); |
| 402 | qcam_set_ack(q, 0); |
| 403 | if (qcam_await_ready1(q, 1)) { |
| 404 | qc_setup(q); |
| 405 | return -EIO; |
| 406 | } |
| 407 | qcam_set_ack(q, 1); |
| 408 | if (qcam_await_ready1(q, 0)) { |
| 409 | qc_setup(q); |
| 410 | return -EIO; |
| 411 | } |
| 412 | } |
| 413 | |
| 414 | wantlen = lines * pixelsperline * 24 / 8; |
| 415 | |
| 416 | while (wantlen) |
| 417 | { |
| 418 | size_t t, s; |
| 419 | s = (wantlen > BUFSZ)?BUFSZ:wantlen; |
| 420 | t = qcam_read_bytes(q, tmpbuf, s); |
| 421 | if (outptr < len) |
| 422 | { |
| 423 | size_t sz = len - outptr; |
| 424 | if (sz > t) sz = t; |
| 425 | if (__copy_to_user(buf+outptr, tmpbuf, sz)) |
| 426 | break; |
| 427 | outptr += sz; |
| 428 | } |
| 429 | wantlen -= t; |
| 430 | if (t < s) |
| 431 | break; |
| 432 | cond_resched(); |
| 433 | } |
| 434 | |
| 435 | len = outptr; |
| 436 | |
| 437 | if (wantlen) |
| 438 | { |
| 439 | printk("qcam: short read.\n"); |
| 440 | if (is_bi_dir) |
| 441 | parport_data_forward(q->pport); |
| 442 | qc_setup(q); |
| 443 | return len; |
| 444 | } |
| 445 | |
| 446 | if (is_bi_dir) |
| 447 | { |
| 448 | int l; |
| 449 | do { |
| 450 | l = qcam_read_bytes(q, tmpbuf, 3); |
| 451 | cond_resched(); |
| 452 | } while (l && (tmpbuf[0] == 0x7e || tmpbuf[1] == 0x7e || tmpbuf[2] == 0x7e)); |
| 453 | if (force_rgb) { |
| 454 | if (tmpbuf[0] != 0xe || tmpbuf[1] != 0x0 || tmpbuf[2] != 0xf) |
| 455 | printk("qcam: bad EOF\n"); |
| 456 | } else { |
| 457 | if (tmpbuf[0] != 0xf || tmpbuf[1] != 0x0 || tmpbuf[2] != 0xe) |
| 458 | printk("qcam: bad EOF\n"); |
| 459 | } |
| 460 | qcam_set_ack(q, 0); |
| 461 | if (qcam_await_ready1(q, 1)) |
| 462 | { |
| 463 | printk("qcam: no ack after EOF\n"); |
| 464 | parport_data_forward(q->pport); |
| 465 | qc_setup(q); |
| 466 | return len; |
| 467 | } |
| 468 | parport_data_forward(q->pport); |
| 469 | mdelay(3); |
| 470 | qcam_set_ack(q, 1); |
| 471 | if (qcam_await_ready1(q, 0)) |
| 472 | { |
| 473 | printk("qcam: no ack to port turnaround\n"); |
| 474 | qc_setup(q); |
| 475 | return len; |
| 476 | } |
| 477 | } |
| 478 | else |
| 479 | { |
| 480 | int l; |
| 481 | do { |
| 482 | l = qcam_read_bytes(q, tmpbuf, 1); |
| 483 | cond_resched(); |
| 484 | } while (l && tmpbuf[0] == 0x7e); |
| 485 | l = qcam_read_bytes(q, tmpbuf+1, 2); |
| 486 | if (force_rgb) { |
| 487 | if (tmpbuf[0] != 0xe || tmpbuf[1] != 0x0 || tmpbuf[2] != 0xf) |
| 488 | printk("qcam: bad EOF\n"); |
| 489 | } else { |
| 490 | if (tmpbuf[0] != 0xf || tmpbuf[1] != 0x0 || tmpbuf[2] != 0xe) |
| 491 | printk("qcam: bad EOF\n"); |
| 492 | } |
| 493 | } |
| 494 | |
| 495 | qcam_write_data(q, 0); |
| 496 | return len; |
| 497 | } |
| 498 | |
| 499 | /* |
| 500 | * Video4linux interfacing |
| 501 | */ |
| 502 | |
Hans Verkuil | 069b747 | 2008-12-30 07:04:34 -0300 | [diff] [blame] | 503 | static long qcam_do_ioctl(struct file *file, unsigned int cmd, void *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | { |
| 505 | struct video_device *dev = video_devdata(file); |
| 506 | struct qcam_device *qcam=(struct qcam_device *)dev; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 507 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | switch(cmd) |
| 509 | { |
| 510 | case VIDIOCGCAP: |
| 511 | { |
| 512 | struct video_capability *b = arg; |
| 513 | strcpy(b->name, "Quickcam"); |
| 514 | b->type = VID_TYPE_CAPTURE|VID_TYPE_SCALES; |
| 515 | b->channels = 1; |
| 516 | b->audios = 0; |
| 517 | b->maxwidth = 320; |
| 518 | b->maxheight = 240; |
| 519 | b->minwidth = 80; |
| 520 | b->minheight = 60; |
| 521 | return 0; |
| 522 | } |
| 523 | case VIDIOCGCHAN: |
| 524 | { |
| 525 | struct video_channel *v = arg; |
| 526 | if(v->channel!=0) |
| 527 | return -EINVAL; |
| 528 | v->flags=0; |
| 529 | v->tuners=0; |
| 530 | /* Good question.. its composite or SVHS so.. */ |
| 531 | v->type = VIDEO_TYPE_CAMERA; |
| 532 | strcpy(v->name, "Camera"); |
| 533 | return 0; |
| 534 | } |
| 535 | case VIDIOCSCHAN: |
| 536 | { |
| 537 | struct video_channel *v = arg; |
| 538 | if(v->channel!=0) |
| 539 | return -EINVAL; |
| 540 | return 0; |
| 541 | } |
| 542 | case VIDIOCGTUNER: |
| 543 | { |
| 544 | struct video_tuner *v = arg; |
| 545 | if(v->tuner) |
| 546 | return -EINVAL; |
| 547 | memset(v,0,sizeof(*v)); |
| 548 | strcpy(v->name, "Format"); |
| 549 | v->mode = VIDEO_MODE_AUTO; |
| 550 | return 0; |
| 551 | } |
| 552 | case VIDIOCSTUNER: |
| 553 | { |
| 554 | struct video_tuner *v = arg; |
| 555 | if(v->tuner) |
| 556 | return -EINVAL; |
| 557 | if(v->mode!=VIDEO_MODE_AUTO) |
| 558 | return -EINVAL; |
| 559 | return 0; |
| 560 | } |
| 561 | case VIDIOCGPICT: |
| 562 | { |
| 563 | struct video_picture *p = arg; |
| 564 | p->colour=0x8000; |
| 565 | p->hue=0x8000; |
| 566 | p->brightness=qcam->brightness<<8; |
| 567 | p->contrast=qcam->contrast<<8; |
| 568 | p->whiteness=qcam->whitebal<<8; |
| 569 | p->depth=24; |
| 570 | p->palette=VIDEO_PALETTE_RGB24; |
| 571 | return 0; |
| 572 | } |
| 573 | case VIDIOCSPICT: |
| 574 | { |
| 575 | struct video_picture *p = arg; |
| 576 | |
| 577 | /* |
| 578 | * Sanity check args |
| 579 | */ |
| 580 | if (p->depth != 24 || p->palette != VIDEO_PALETTE_RGB24) |
| 581 | return -EINVAL; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 582 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | /* |
| 584 | * Now load the camera. |
| 585 | */ |
| 586 | qcam->brightness = p->brightness>>8; |
| 587 | qcam->contrast = p->contrast>>8; |
| 588 | qcam->whitebal = p->whiteness>>8; |
| 589 | |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 590 | mutex_lock(&qcam->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | parport_claim_or_block(qcam->pdev); |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 592 | qc_setup(qcam); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | parport_release(qcam->pdev); |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 594 | mutex_unlock(&qcam->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | return 0; |
| 596 | } |
| 597 | case VIDIOCSWIN: |
| 598 | { |
| 599 | struct video_window *vw = arg; |
| 600 | |
| 601 | if(vw->flags) |
| 602 | return -EINVAL; |
| 603 | if(vw->clipcount) |
| 604 | return -EINVAL; |
| 605 | if(vw->height<60||vw->height>240) |
| 606 | return -EINVAL; |
| 607 | if(vw->width<80||vw->width>320) |
| 608 | return -EINVAL; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 609 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | qcam->width = 80; |
| 611 | qcam->height = 60; |
| 612 | qcam->mode = QC_DECIMATION_4; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 613 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | if(vw->width>=160 && vw->height>=120) |
| 615 | { |
| 616 | qcam->width = 160; |
| 617 | qcam->height = 120; |
| 618 | qcam->mode = QC_DECIMATION_2; |
| 619 | } |
| 620 | if(vw->width>=320 && vw->height>=240) |
| 621 | { |
| 622 | qcam->width = 320; |
| 623 | qcam->height = 240; |
| 624 | qcam->mode = QC_DECIMATION_1; |
| 625 | } |
| 626 | qcam->mode |= QC_MILLIONS; |
| 627 | #if 0 |
| 628 | if(vw->width>=640 && vw->height>=480) |
| 629 | { |
| 630 | qcam->width = 640; |
| 631 | qcam->height = 480; |
| 632 | qcam->mode = QC_BILLIONS | QC_DECIMATION_1; |
| 633 | } |
| 634 | #endif |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 635 | /* Ok we figured out what to use from our |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 636 | wide choice */ |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 637 | mutex_lock(&qcam->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | parport_claim_or_block(qcam->pdev); |
| 639 | qc_setup(qcam); |
| 640 | parport_release(qcam->pdev); |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 641 | mutex_unlock(&qcam->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | return 0; |
| 643 | } |
| 644 | case VIDIOCGWIN: |
| 645 | { |
| 646 | struct video_window *vw = arg; |
| 647 | memset(vw, 0, sizeof(*vw)); |
| 648 | vw->width=qcam->width; |
| 649 | vw->height=qcam->height; |
| 650 | return 0; |
| 651 | } |
| 652 | case VIDIOCKEY: |
| 653 | return 0; |
| 654 | case VIDIOCCAPTURE: |
| 655 | case VIDIOCGFBUF: |
| 656 | case VIDIOCSFBUF: |
| 657 | case VIDIOCGFREQ: |
| 658 | case VIDIOCSFREQ: |
| 659 | case VIDIOCGAUDIO: |
| 660 | case VIDIOCSAUDIO: |
| 661 | return -EINVAL; |
| 662 | default: |
| 663 | return -ENOIOCTLCMD; |
| 664 | } |
| 665 | return 0; |
| 666 | } |
| 667 | |
Hans Verkuil | 069b747 | 2008-12-30 07:04:34 -0300 | [diff] [blame] | 668 | static long qcam_ioctl(struct file *file, |
Hans Verkuil | f473bf7 | 2008-11-01 08:25:11 -0300 | [diff] [blame] | 669 | unsigned int cmd, unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | { |
Hans Verkuil | f473bf7 | 2008-11-01 08:25:11 -0300 | [diff] [blame] | 671 | return video_usercopy(file, cmd, arg, qcam_do_ioctl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | } |
| 673 | |
| 674 | static ssize_t qcam_read(struct file *file, char __user *buf, |
| 675 | size_t count, loff_t *ppos) |
| 676 | { |
| 677 | struct video_device *v = video_devdata(file); |
| 678 | struct qcam_device *qcam=(struct qcam_device *)v; |
| 679 | int len; |
| 680 | |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 681 | mutex_lock(&qcam->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | parport_claim_or_block(qcam->pdev); |
| 683 | /* Probably should have a semaphore against multiple users */ |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 684 | len = qc_capture(qcam, buf,count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | parport_release(qcam->pdev); |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 686 | mutex_unlock(&qcam->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 687 | return len; |
| 688 | } |
| 689 | |
Hans Verkuil | bec4366 | 2008-12-30 06:58:20 -0300 | [diff] [blame] | 690 | static int qcam_exclusive_open(struct file *file) |
Hans Verkuil | 7d43cd5 | 2008-08-23 05:31:47 -0300 | [diff] [blame] | 691 | { |
| 692 | struct video_device *dev = video_devdata(file); |
| 693 | struct qcam_device *qcam = (struct qcam_device *)dev; |
| 694 | |
| 695 | return test_and_set_bit(0, &qcam->in_use) ? -EBUSY : 0; |
| 696 | } |
| 697 | |
Hans Verkuil | bec4366 | 2008-12-30 06:58:20 -0300 | [diff] [blame] | 698 | static int qcam_exclusive_release(struct file *file) |
Hans Verkuil | 7d43cd5 | 2008-08-23 05:31:47 -0300 | [diff] [blame] | 699 | { |
| 700 | struct video_device *dev = video_devdata(file); |
| 701 | struct qcam_device *qcam = (struct qcam_device *)dev; |
| 702 | |
| 703 | clear_bit(0, &qcam->in_use); |
| 704 | return 0; |
| 705 | } |
| 706 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | /* video device template */ |
Hans Verkuil | bec4366 | 2008-12-30 06:58:20 -0300 | [diff] [blame] | 708 | static const struct v4l2_file_operations qcam_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 709 | .owner = THIS_MODULE, |
Hans Verkuil | 7d43cd5 | 2008-08-23 05:31:47 -0300 | [diff] [blame] | 710 | .open = qcam_exclusive_open, |
| 711 | .release = qcam_exclusive_release, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 712 | .ioctl = qcam_ioctl, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 713 | .read = qcam_read, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 714 | }; |
| 715 | |
| 716 | static struct video_device qcam_template= |
| 717 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | .name = "Colour QuickCam", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 719 | .fops = &qcam_fops, |
Hans Verkuil | aa5e90a | 2008-08-23 06:23:55 -0300 | [diff] [blame] | 720 | .release = video_device_release_empty, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 721 | }; |
| 722 | |
| 723 | /* Initialize the QuickCam driver control structure. */ |
| 724 | |
| 725 | static struct qcam_device *qcam_init(struct parport *port) |
| 726 | { |
| 727 | struct qcam_device *q; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 728 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 729 | q = kmalloc(sizeof(struct qcam_device), GFP_KERNEL); |
| 730 | if(q==NULL) |
| 731 | return NULL; |
| 732 | |
| 733 | q->pport = port; |
| 734 | q->pdev = parport_register_device(port, "c-qcam", NULL, NULL, |
| 735 | NULL, 0, NULL); |
| 736 | |
| 737 | q->bidirectional = (q->pport->modes & PARPORT_MODE_TRISTATE)?1:0; |
| 738 | |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 739 | if (q->pdev == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | { |
| 741 | printk(KERN_ERR "c-qcam: couldn't register for %s.\n", |
| 742 | port->name); |
| 743 | kfree(q); |
| 744 | return NULL; |
| 745 | } |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 746 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | memcpy(&q->vdev, &qcam_template, sizeof(qcam_template)); |
| 748 | |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 749 | mutex_init(&q->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | q->width = q->ccd_width = 320; |
| 751 | q->height = q->ccd_height = 240; |
| 752 | q->mode = QC_MILLIONS | QC_DECIMATION_1; |
| 753 | q->contrast = 192; |
| 754 | q->brightness = 240; |
| 755 | q->whitebal = 128; |
| 756 | q->top = 1; |
| 757 | q->left = 14; |
| 758 | return q; |
| 759 | } |
| 760 | |
| 761 | static struct qcam_device *qcams[MAX_CAMS]; |
Douglas Schilling Landgraf | ff699e6 | 2008-04-22 14:41:48 -0300 | [diff] [blame] | 762 | static unsigned int num_cams; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | |
| 764 | static int init_cqcam(struct parport *port) |
| 765 | { |
| 766 | struct qcam_device *qcam; |
| 767 | |
| 768 | if (parport[0] != -1) |
| 769 | { |
| 770 | /* The user gave specific instructions */ |
| 771 | int i, found = 0; |
| 772 | for (i = 0; i < MAX_CAMS && parport[i] != -1; i++) |
| 773 | { |
| 774 | if (parport[0] == port->number) |
| 775 | found = 1; |
| 776 | } |
| 777 | if (!found) |
| 778 | return -ENODEV; |
| 779 | } |
| 780 | |
| 781 | if (num_cams == MAX_CAMS) |
| 782 | return -ENOSPC; |
| 783 | |
| 784 | qcam = qcam_init(port); |
| 785 | if (qcam==NULL) |
| 786 | return -ENODEV; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 787 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 788 | parport_claim_or_block(qcam->pdev); |
| 789 | |
| 790 | qc_reset(qcam); |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 791 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | if (probe && qc_detect(qcam)==0) |
| 793 | { |
| 794 | parport_release(qcam->pdev); |
| 795 | parport_unregister_device(qcam->pdev); |
| 796 | kfree(qcam); |
| 797 | return -ENODEV; |
| 798 | } |
| 799 | |
| 800 | qc_setup(qcam); |
| 801 | |
| 802 | parport_release(qcam->pdev); |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 803 | |
Hans Verkuil | dc60de3 | 2008-09-03 17:11:58 -0300 | [diff] [blame] | 804 | if (video_register_device(&qcam->vdev, VFL_TYPE_GRABBER, video_nr) < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | printk(KERN_ERR "Unable to register Colour QuickCam on %s\n", |
| 806 | qcam->pport->name); |
| 807 | parport_unregister_device(qcam->pdev); |
| 808 | kfree(qcam); |
| 809 | return -ENODEV; |
| 810 | } |
| 811 | |
Laurent Pinchart | 38c7c03 | 2009-11-27 13:57:15 -0300 | [diff] [blame] | 812 | printk(KERN_INFO "%s: Colour QuickCam found on %s\n", |
| 813 | video_device_node_name(&qcam->vdev), qcam->pport->name); |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 814 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 815 | qcams[num_cams++] = qcam; |
| 816 | |
| 817 | return 0; |
| 818 | } |
| 819 | |
| 820 | static void close_cqcam(struct qcam_device *qcam) |
| 821 | { |
| 822 | video_unregister_device(&qcam->vdev); |
| 823 | parport_unregister_device(qcam->pdev); |
| 824 | kfree(qcam); |
| 825 | } |
| 826 | |
| 827 | static void cq_attach(struct parport *port) |
| 828 | { |
| 829 | init_cqcam(port); |
| 830 | } |
| 831 | |
| 832 | static void cq_detach(struct parport *port) |
| 833 | { |
| 834 | /* Write this some day. */ |
| 835 | } |
| 836 | |
| 837 | static struct parport_driver cqcam_driver = { |
| 838 | .name = "cqcam", |
| 839 | .attach = cq_attach, |
| 840 | .detach = cq_detach, |
| 841 | }; |
| 842 | |
| 843 | static int __init cqcam_init (void) |
| 844 | { |
| 845 | printk(BANNER "\n"); |
| 846 | |
| 847 | return parport_register_driver(&cqcam_driver); |
| 848 | } |
| 849 | |
| 850 | static void __exit cqcam_cleanup (void) |
| 851 | { |
| 852 | unsigned int i; |
| 853 | |
| 854 | for (i = 0; i < num_cams; i++) |
| 855 | close_cqcam(qcams[i]); |
| 856 | |
| 857 | parport_unregister_driver(&cqcam_driver); |
| 858 | } |
| 859 | |
| 860 | MODULE_AUTHOR("Philip Blundell <philb@gnu.org>"); |
| 861 | MODULE_DESCRIPTION(BANNER); |
| 862 | MODULE_LICENSE("GPL"); |
| 863 | |
| 864 | /* FIXME: parport=auto would never have worked, surely? --RR */ |
| 865 | MODULE_PARM_DESC(parport ,"parport=<auto|n[,n]...> for port detection method\n\ |
| 866 | probe=<0|1|2> for camera detection method\n\ |
| 867 | force_rgb=<0|1> for RGB data format (default BGR)"); |
| 868 | module_param_array(parport, int, NULL, 0); |
| 869 | module_param(probe, int, 0); |
| 870 | module_param(force_rgb, bool, 0); |
| 871 | module_param(video_nr, int, 0); |
| 872 | |
| 873 | module_init(cqcam_init); |
| 874 | module_exit(cqcam_cleanup); |