Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * QuickCam Driver For Video4Linux. |
| 3 | * |
| 4 | * Video4Linux conversion work by Alan Cox. |
| 5 | * Parport compatibility by Phil Blundell. |
| 6 | * Busy loop avoidance by Mark Cooke. |
| 7 | * |
| 8 | * Module parameters: |
| 9 | * |
| 10 | * maxpoll=<1 - 5000> |
| 11 | * |
| 12 | * When polling the QuickCam for a response, busy-wait for a |
| 13 | * maximum of this many loops. The default of 250 gives little |
| 14 | * impact on interactive response. |
| 15 | * |
| 16 | * NOTE: If this parameter is set too high, the processor |
| 17 | * will busy wait until this loop times out, and then |
| 18 | * slowly poll for a further 5 seconds before failing |
| 19 | * the transaction. You have been warned. |
| 20 | * |
| 21 | * yieldlines=<1 - 250> |
| 22 | * |
| 23 | * When acquiring a frame from the camera, the data gathering |
| 24 | * loop will yield back to the scheduler after completing |
| 25 | * this many lines. The default of 4 provides a trade-off |
| 26 | * between increased frame acquisition time and impact on |
| 27 | * interactive response. |
| 28 | */ |
| 29 | |
| 30 | /* qcam-lib.c -- Library for programming with the Connectix QuickCam. |
| 31 | * See the included documentation for usage instructions and details |
| 32 | * of the protocol involved. */ |
| 33 | |
| 34 | |
| 35 | /* Version 0.5, August 4, 1996 */ |
| 36 | /* Version 0.7, August 27, 1996 */ |
| 37 | /* Version 0.9, November 17, 1996 */ |
| 38 | |
| 39 | |
| 40 | /****************************************************************** |
| 41 | |
| 42 | Copyright (C) 1996 by Scott Laird |
| 43 | |
| 44 | Permission is hereby granted, free of charge, to any person obtaining |
| 45 | a copy of this software and associated documentation files (the |
| 46 | "Software"), to deal in the Software without restriction, including |
| 47 | without limitation the rights to use, copy, modify, merge, publish, |
| 48 | distribute, sublicense, and/or sell copies of the Software, and to |
| 49 | permit persons to whom the Software is furnished to do so, subject to |
| 50 | the following conditions: |
| 51 | |
| 52 | The above copyright notice and this permission notice shall be |
| 53 | included in all copies or substantial portions of the Software. |
| 54 | |
| 55 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 56 | EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 57 | MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| 58 | IN NO EVENT SHALL SCOTT LAIRD BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| 59 | OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| 60 | ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| 61 | OTHER DEALINGS IN THE SOFTWARE. |
| 62 | |
| 63 | ******************************************************************/ |
| 64 | |
| 65 | #include <linux/module.h> |
| 66 | #include <linux/delay.h> |
| 67 | #include <linux/errno.h> |
| 68 | #include <linux/fs.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | #include <linux/kernel.h> |
| 70 | #include <linux/slab.h> |
| 71 | #include <linux/mm.h> |
| 72 | #include <linux/parport.h> |
| 73 | #include <linux/sched.h> |
Hans Verkuil | 483d67f | 2010-05-10 03:51:02 -0300 | [diff] [blame] | 74 | #include <linux/videodev2.h> |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 75 | #include <linux/mutex.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | #include <asm/uaccess.h> |
Hans Verkuil | 483d67f | 2010-05-10 03:51:02 -0300 | [diff] [blame] | 77 | #include <media/v4l2-common.h> |
| 78 | #include <media/v4l2-ioctl.h> |
| 79 | #include <media/v4l2-device.h> |
Hans Verkuil | 5fa1a89 | 2012-05-08 15:12:41 -0300 | [diff] [blame] | 80 | #include <media/v4l2-fh.h> |
| 81 | #include <media/v4l2-ctrls.h> |
| 82 | #include <media/v4l2-event.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | |
Hans Verkuil | 483d67f | 2010-05-10 03:51:02 -0300 | [diff] [blame] | 84 | /* One from column A... */ |
| 85 | #define QC_NOTSET 0 |
| 86 | #define QC_UNIDIR 1 |
| 87 | #define QC_BIDIR 2 |
| 88 | #define QC_SERIAL 3 |
| 89 | |
| 90 | /* ... and one from column B */ |
| 91 | #define QC_ANY 0x00 |
| 92 | #define QC_FORCE_UNIDIR 0x10 |
| 93 | #define QC_FORCE_BIDIR 0x20 |
| 94 | #define QC_FORCE_SERIAL 0x30 |
| 95 | /* in the port_mode member */ |
| 96 | |
| 97 | #define QC_MODE_MASK 0x07 |
| 98 | #define QC_FORCE_MASK 0x70 |
| 99 | |
| 100 | #define MAX_HEIGHT 243 |
| 101 | #define MAX_WIDTH 336 |
| 102 | |
| 103 | /* Bit fields for status flags */ |
| 104 | #define QC_PARAM_CHANGE 0x01 /* Camera status change has occurred */ |
| 105 | |
| 106 | struct qcam { |
| 107 | struct v4l2_device v4l2_dev; |
| 108 | struct video_device vdev; |
Hans Verkuil | 5fa1a89 | 2012-05-08 15:12:41 -0300 | [diff] [blame] | 109 | struct v4l2_ctrl_handler hdl; |
Hans Verkuil | 483d67f | 2010-05-10 03:51:02 -0300 | [diff] [blame] | 110 | struct pardevice *pdev; |
| 111 | struct parport *pport; |
| 112 | struct mutex lock; |
| 113 | int width, height; |
| 114 | int bpp; |
| 115 | int mode; |
| 116 | int contrast, brightness, whitebal; |
| 117 | int port_mode; |
| 118 | int transfer_scale; |
| 119 | int top, left; |
| 120 | int status; |
| 121 | unsigned int saved_bits; |
| 122 | unsigned long in_use; |
| 123 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | |
Hans Verkuil | 1d61aac | 2010-03-22 04:36:04 -0300 | [diff] [blame] | 125 | static unsigned int maxpoll = 250; /* Maximum busy-loop count for qcam I/O */ |
| 126 | static unsigned int yieldlines = 4; /* Yield after this many during capture */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | static int video_nr = -1; |
Brett T. Warden | d685a48 | 2008-01-10 04:33:31 -0300 | [diff] [blame] | 128 | static unsigned int force_init; /* Whether to probe aggressively */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | |
| 130 | module_param(maxpoll, int, 0); |
| 131 | module_param(yieldlines, int, 0); |
| 132 | module_param(video_nr, int, 0); |
| 133 | |
Brett T. Warden | d685a48 | 2008-01-10 04:33:31 -0300 | [diff] [blame] | 134 | /* Set force_init=1 to avoid detection by polling status register and |
| 135 | * immediately attempt to initialize qcam */ |
| 136 | module_param(force_init, int, 0); |
| 137 | |
Hans Verkuil | 483d67f | 2010-05-10 03:51:02 -0300 | [diff] [blame] | 138 | #define MAX_CAMS 4 |
| 139 | static struct qcam *qcams[MAX_CAMS]; |
| 140 | static unsigned int num_cams; |
| 141 | |
| 142 | static inline int read_lpstatus(struct qcam *q) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | { |
| 144 | return parport_read_status(q->pport); |
| 145 | } |
| 146 | |
Hans Verkuil | 483d67f | 2010-05-10 03:51:02 -0300 | [diff] [blame] | 147 | static inline int read_lpdata(struct qcam *q) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | { |
| 149 | return parport_read_data(q->pport); |
| 150 | } |
| 151 | |
Hans Verkuil | 483d67f | 2010-05-10 03:51:02 -0300 | [diff] [blame] | 152 | static inline void write_lpdata(struct qcam *q, int d) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | { |
| 154 | parport_write_data(q->pport, d); |
| 155 | } |
| 156 | |
Hans Verkuil | 483d67f | 2010-05-10 03:51:02 -0300 | [diff] [blame] | 157 | static void write_lpcontrol(struct qcam *q, int d) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | { |
Brett Warden | 7c596fa | 2007-10-02 17:37:21 -0300 | [diff] [blame] | 159 | if (d & 0x20) { |
Brett Warden | 9e19db5 | 2007-09-28 03:19:04 -0300 | [diff] [blame] | 160 | /* Set bidirectional mode to reverse (data in) */ |
| 161 | parport_data_reverse(q->pport); |
| 162 | } else { |
| 163 | /* Set bidirectional mode to forward (data out) */ |
| 164 | parport_data_forward(q->pport); |
| 165 | } |
| 166 | |
| 167 | /* Now issue the regular port command, but strip out the |
| 168 | * direction flag */ |
| 169 | d &= ~0x20; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | parport_write_control(q->pport, d); |
| 171 | } |
| 172 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | |
| 174 | /* qc_waithand busy-waits for a handshake signal from the QuickCam. |
| 175 | * Almost all communication with the camera requires handshaking. */ |
| 176 | |
Hans Verkuil | 483d67f | 2010-05-10 03:51:02 -0300 | [diff] [blame] | 177 | static int qc_waithand(struct qcam *q, int val) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | { |
| 179 | int status; |
Hans Verkuil | 1d61aac | 2010-03-22 04:36:04 -0300 | [diff] [blame] | 180 | int runs = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | |
Hans Verkuil | 1d61aac | 2010-03-22 04:36:04 -0300 | [diff] [blame] | 182 | if (val) { |
| 183 | while (!((status = read_lpstatus(q)) & 8)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | /* 1000 is enough spins on the I/O for all normal |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 185 | cases, at that point we start to poll slowly |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | until the camera wakes up. However, we are |
| 187 | busy blocked until the camera responds, so |
| 188 | setting it lower is much better for interactive |
| 189 | response. */ |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 190 | |
Hans Verkuil | 1d61aac | 2010-03-22 04:36:04 -0300 | [diff] [blame] | 191 | if (runs++ > maxpoll) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | msleep_interruptible(5); |
Hans Verkuil | 1d61aac | 2010-03-22 04:36:04 -0300 | [diff] [blame] | 193 | if (runs > (maxpoll + 1000)) /* 5 seconds */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | return -1; |
| 195 | } |
Hans Verkuil | 1d61aac | 2010-03-22 04:36:04 -0300 | [diff] [blame] | 196 | } else { |
| 197 | while (((status = read_lpstatus(q)) & 8)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | /* 1000 is enough spins on the I/O for all normal |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 199 | cases, at that point we start to poll slowly |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | until the camera wakes up. However, we are |
| 201 | busy blocked until the camera responds, so |
| 202 | setting it lower is much better for interactive |
| 203 | response. */ |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 204 | |
Hans Verkuil | 1d61aac | 2010-03-22 04:36:04 -0300 | [diff] [blame] | 205 | if (runs++ > maxpoll) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | msleep_interruptible(5); |
Hans Verkuil | 1d61aac | 2010-03-22 04:36:04 -0300 | [diff] [blame] | 207 | if (runs++ > (maxpoll + 1000)) /* 5 seconds */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | return -1; |
| 209 | } |
| 210 | } |
| 211 | |
| 212 | return status; |
| 213 | } |
| 214 | |
| 215 | /* Waithand2 is used when the qcam is in bidirectional mode, and the |
| 216 | * handshaking signal is CamRdy2 (bit 0 of data reg) instead of CamRdy1 |
| 217 | * (bit 3 of status register). It also returns the last value read, |
| 218 | * since this data is useful. */ |
| 219 | |
Hans Verkuil | 483d67f | 2010-05-10 03:51:02 -0300 | [diff] [blame] | 220 | static unsigned int qc_waithand2(struct qcam *q, int val) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | { |
| 222 | unsigned int status; |
Hans Verkuil | 1d61aac | 2010-03-22 04:36:04 -0300 | [diff] [blame] | 223 | int runs = 0; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 224 | |
Hans Verkuil | 1d61aac | 2010-03-22 04:36:04 -0300 | [diff] [blame] | 225 | do { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | status = read_lpdata(q); |
| 227 | /* 1000 is enough spins on the I/O for all normal |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 228 | cases, at that point we start to poll slowly |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | until the camera wakes up. However, we are |
| 230 | busy blocked until the camera responds, so |
| 231 | setting it lower is much better for interactive |
| 232 | response. */ |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 233 | |
Hans Verkuil | 1d61aac | 2010-03-22 04:36:04 -0300 | [diff] [blame] | 234 | if (runs++ > maxpoll) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | msleep_interruptible(5); |
Hans Verkuil | 1d61aac | 2010-03-22 04:36:04 -0300 | [diff] [blame] | 236 | if (runs++ > (maxpoll + 1000)) /* 5 seconds */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | return 0; |
Hans Verkuil | 1d61aac | 2010-03-22 04:36:04 -0300 | [diff] [blame] | 238 | } while ((status & 1) != val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | |
| 240 | return status; |
| 241 | } |
| 242 | |
Hans Verkuil | 483d67f | 2010-05-10 03:51:02 -0300 | [diff] [blame] | 243 | /* qc_command is probably a bit of a misnomer -- it's used to send |
| 244 | * bytes *to* the camera. Generally, these bytes are either commands |
| 245 | * or arguments to commands, so the name fits, but it still bugs me a |
| 246 | * bit. See the documentation for a list of commands. */ |
| 247 | |
| 248 | static int qc_command(struct qcam *q, int command) |
| 249 | { |
| 250 | int n1, n2; |
| 251 | int cmd; |
| 252 | |
| 253 | write_lpdata(q, command); |
| 254 | write_lpcontrol(q, 6); |
| 255 | |
| 256 | n1 = qc_waithand(q, 1); |
| 257 | |
| 258 | write_lpcontrol(q, 0xe); |
| 259 | n2 = qc_waithand(q, 0); |
| 260 | |
| 261 | cmd = (n1 & 0xf0) | ((n2 & 0xf0) >> 4); |
| 262 | return cmd; |
| 263 | } |
| 264 | |
| 265 | static int qc_readparam(struct qcam *q) |
| 266 | { |
| 267 | int n1, n2; |
| 268 | int cmd; |
| 269 | |
| 270 | write_lpcontrol(q, 6); |
| 271 | n1 = qc_waithand(q, 1); |
| 272 | |
| 273 | write_lpcontrol(q, 0xe); |
| 274 | n2 = qc_waithand(q, 0); |
| 275 | |
| 276 | cmd = (n1 & 0xf0) | ((n2 & 0xf0) >> 4); |
| 277 | return cmd; |
| 278 | } |
| 279 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | |
| 281 | /* Try to detect a QuickCam. It appears to flash the upper 4 bits of |
| 282 | the status register at 5-10 Hz. This is only used in the autoprobe |
| 283 | code. Be aware that this isn't the way Connectix detects the |
| 284 | camera (they send a reset and try to handshake), but this should be |
| 285 | almost completely safe, while their method screws up my printer if |
| 286 | I plug it in before the camera. */ |
| 287 | |
Hans Verkuil | 483d67f | 2010-05-10 03:51:02 -0300 | [diff] [blame] | 288 | static int qc_detect(struct qcam *q) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | { |
| 290 | int reg, lastreg; |
| 291 | int count = 0; |
| 292 | int i; |
| 293 | |
Brett T. Warden | d685a48 | 2008-01-10 04:33:31 -0300 | [diff] [blame] | 294 | if (force_init) |
| 295 | return 1; |
| 296 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | lastreg = reg = read_lpstatus(q) & 0xf0; |
| 298 | |
Hans Verkuil | 1d61aac | 2010-03-22 04:36:04 -0300 | [diff] [blame] | 299 | for (i = 0; i < 500; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | reg = read_lpstatus(q) & 0xf0; |
| 301 | if (reg != lastreg) |
| 302 | count++; |
| 303 | lastreg = reg; |
| 304 | mdelay(2); |
| 305 | } |
| 306 | |
| 307 | |
| 308 | #if 0 |
| 309 | /* Force camera detection during testing. Sometimes the camera |
| 310 | won't be flashing these bits. Possibly unloading the module |
| 311 | in the middle of a grab? Or some timeout condition? |
| 312 | I've seen this parameter as low as 19 on my 450Mhz box - mpc */ |
Hans Verkuil | 1d61aac | 2010-03-22 04:36:04 -0300 | [diff] [blame] | 313 | printk(KERN_DEBUG "Debugging: QCam detection counter <30-200 counts as detected>: %d\n", count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | return 1; |
| 315 | #endif |
| 316 | |
| 317 | /* Be (even more) liberal in what you accept... */ |
| 318 | |
Brett Warden | 7c596fa | 2007-10-02 17:37:21 -0300 | [diff] [blame] | 319 | if (count > 20 && count < 400) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | return 1; /* found */ |
Brett Warden | 9e19db5 | 2007-09-28 03:19:04 -0300 | [diff] [blame] | 321 | } else { |
Brett Warden | 7c596fa | 2007-10-02 17:37:21 -0300 | [diff] [blame] | 322 | printk(KERN_ERR "No Quickcam found on port %s\n", |
Hans Verkuil | 1d61aac | 2010-03-22 04:36:04 -0300 | [diff] [blame] | 323 | q->pport->name); |
Brett T. Warden | d685a48 | 2008-01-10 04:33:31 -0300 | [diff] [blame] | 324 | printk(KERN_DEBUG "Quickcam detection counter: %u\n", count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | return 0; /* not found */ |
Brett Warden | 9e19db5 | 2007-09-28 03:19:04 -0300 | [diff] [blame] | 326 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | } |
| 328 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | /* Decide which scan mode to use. There's no real requirement that |
| 330 | * the scanmode match the resolution in q->height and q-> width -- the |
| 331 | * camera takes the picture at the resolution specified in the |
| 332 | * "scanmode" and then returns the image at the resolution specified |
| 333 | * with the resolution commands. If the scan is bigger than the |
| 334 | * requested resolution, the upper-left hand corner of the scan is |
| 335 | * returned. If the scan is smaller, then the rest of the image |
| 336 | * returned contains garbage. */ |
| 337 | |
Hans Verkuil | 483d67f | 2010-05-10 03:51:02 -0300 | [diff] [blame] | 338 | static int qc_setscanmode(struct qcam *q) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | { |
| 340 | int old_mode = q->mode; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 341 | |
Hans Verkuil | 1d61aac | 2010-03-22 04:36:04 -0300 | [diff] [blame] | 342 | switch (q->transfer_scale) { |
| 343 | case 1: |
| 344 | q->mode = 0; |
| 345 | break; |
| 346 | case 2: |
| 347 | q->mode = 4; |
| 348 | break; |
| 349 | case 4: |
| 350 | q->mode = 8; |
| 351 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | } |
| 353 | |
Hans Verkuil | 1d61aac | 2010-03-22 04:36:04 -0300 | [diff] [blame] | 354 | switch (q->bpp) { |
| 355 | case 4: |
| 356 | break; |
| 357 | case 6: |
| 358 | q->mode += 2; |
| 359 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | } |
| 361 | |
Hans Verkuil | 1d61aac | 2010-03-22 04:36:04 -0300 | [diff] [blame] | 362 | switch (q->port_mode & QC_MODE_MASK) { |
| 363 | case QC_BIDIR: |
| 364 | q->mode += 1; |
| 365 | break; |
| 366 | case QC_NOTSET: |
| 367 | case QC_UNIDIR: |
| 368 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | } |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 370 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | if (q->mode != old_mode) |
| 372 | q->status |= QC_PARAM_CHANGE; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 373 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | return 0; |
| 375 | } |
| 376 | |
| 377 | |
Hans Verkuil | 483d67f | 2010-05-10 03:51:02 -0300 | [diff] [blame] | 378 | /* Reset the QuickCam. This uses the same sequence the Windows |
| 379 | * QuickPic program uses. Someone with a bi-directional port should |
| 380 | * check that bi-directional mode is detected right, and then |
| 381 | * implement bi-directional mode in qc_readbyte(). */ |
| 382 | |
| 383 | static void qc_reset(struct qcam *q) |
| 384 | { |
| 385 | switch (q->port_mode & QC_FORCE_MASK) { |
| 386 | case QC_FORCE_UNIDIR: |
| 387 | q->port_mode = (q->port_mode & ~QC_MODE_MASK) | QC_UNIDIR; |
| 388 | break; |
| 389 | |
| 390 | case QC_FORCE_BIDIR: |
| 391 | q->port_mode = (q->port_mode & ~QC_MODE_MASK) | QC_BIDIR; |
| 392 | break; |
| 393 | |
| 394 | case QC_ANY: |
| 395 | write_lpcontrol(q, 0x20); |
| 396 | write_lpdata(q, 0x75); |
| 397 | |
| 398 | if (read_lpdata(q) != 0x75) |
| 399 | q->port_mode = (q->port_mode & ~QC_MODE_MASK) | QC_BIDIR; |
| 400 | else |
| 401 | q->port_mode = (q->port_mode & ~QC_MODE_MASK) | QC_UNIDIR; |
| 402 | break; |
| 403 | } |
| 404 | |
| 405 | write_lpcontrol(q, 0xb); |
| 406 | udelay(250); |
| 407 | write_lpcontrol(q, 0xe); |
| 408 | qc_setscanmode(q); /* in case port_mode changed */ |
| 409 | } |
| 410 | |
| 411 | |
| 412 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | /* Reset the QuickCam and program for brightness, contrast, |
| 414 | * white-balance, and resolution. */ |
| 415 | |
Hans Verkuil | 483d67f | 2010-05-10 03:51:02 -0300 | [diff] [blame] | 416 | static void qc_set(struct qcam *q) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | { |
| 418 | int val; |
| 419 | int val2; |
| 420 | |
| 421 | qc_reset(q); |
| 422 | |
| 423 | /* Set the brightness. Yes, this is repetitive, but it works. |
| 424 | * Shorter versions seem to fail subtly. Feel free to try :-). */ |
| 425 | /* I think the problem was in qc_command, not here -- bls */ |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 426 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | qc_command(q, 0xb); |
| 428 | qc_command(q, q->brightness); |
| 429 | |
| 430 | val = q->height / q->transfer_scale; |
| 431 | qc_command(q, 0x11); |
| 432 | qc_command(q, val); |
| 433 | if ((q->port_mode & QC_MODE_MASK) == QC_UNIDIR && q->bpp == 6) { |
| 434 | /* The normal "transfers per line" calculation doesn't seem to work |
| 435 | as expected here (and yet it works fine in qc_scan). No idea |
| 436 | why this case is the odd man out. Fortunately, Laird's original |
| 437 | working version gives me a good way to guess at working values. |
| 438 | -- bls */ |
| 439 | val = q->width; |
| 440 | val2 = q->transfer_scale * 4; |
| 441 | } else { |
| 442 | val = q->width * q->bpp; |
| 443 | val2 = (((q->port_mode & QC_MODE_MASK) == QC_BIDIR) ? 24 : 8) * |
Hans Verkuil | 1d61aac | 2010-03-22 04:36:04 -0300 | [diff] [blame] | 444 | q->transfer_scale; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | } |
Julia Lawall | e9e24ce | 2008-08-20 20:44:53 -0300 | [diff] [blame] | 446 | val = DIV_ROUND_UP(val, val2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | qc_command(q, 0x13); |
| 448 | qc_command(q, val); |
| 449 | |
| 450 | /* Setting top and left -- bls */ |
| 451 | qc_command(q, 0xd); |
| 452 | qc_command(q, q->top); |
| 453 | qc_command(q, 0xf); |
| 454 | qc_command(q, q->left / 2); |
| 455 | |
| 456 | qc_command(q, 0x19); |
| 457 | qc_command(q, q->contrast); |
| 458 | qc_command(q, 0x1f); |
| 459 | qc_command(q, q->whitebal); |
| 460 | |
| 461 | /* Clear flag that we must update the grabbing parameters on the camera |
| 462 | before we grab the next frame */ |
| 463 | q->status &= (~QC_PARAM_CHANGE); |
| 464 | } |
| 465 | |
| 466 | /* Qc_readbytes reads some bytes from the QC and puts them in |
| 467 | the supplied buffer. It returns the number of bytes read, |
| 468 | or -1 on error. */ |
| 469 | |
Hans Verkuil | 483d67f | 2010-05-10 03:51:02 -0300 | [diff] [blame] | 470 | static inline int qc_readbytes(struct qcam *q, char buffer[]) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | { |
Hans Verkuil | 1d61aac | 2010-03-22 04:36:04 -0300 | [diff] [blame] | 472 | int ret = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | unsigned int hi, lo; |
| 474 | unsigned int hi2, lo2; |
Douglas Schilling Landgraf | ff699e6 | 2008-04-22 14:41:48 -0300 | [diff] [blame] | 475 | static int state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | |
Hans Verkuil | 1d61aac | 2010-03-22 04:36:04 -0300 | [diff] [blame] | 477 | if (buffer == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | state = 0; |
| 479 | return 0; |
| 480 | } |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 481 | |
Hans Verkuil | 1d61aac | 2010-03-22 04:36:04 -0300 | [diff] [blame] | 482 | switch (q->port_mode & QC_MODE_MASK) { |
| 483 | case QC_BIDIR: /* Bi-directional Port */ |
| 484 | write_lpcontrol(q, 0x26); |
| 485 | lo = (qc_waithand2(q, 1) >> 1); |
| 486 | hi = (read_lpstatus(q) >> 3) & 0x1f; |
| 487 | write_lpcontrol(q, 0x2e); |
| 488 | lo2 = (qc_waithand2(q, 0) >> 1); |
| 489 | hi2 = (read_lpstatus(q) >> 3) & 0x1f; |
| 490 | switch (q->bpp) { |
| 491 | case 4: |
| 492 | buffer[0] = lo & 0xf; |
| 493 | buffer[1] = ((lo & 0x70) >> 4) | ((hi & 1) << 3); |
| 494 | buffer[2] = (hi & 0x1e) >> 1; |
| 495 | buffer[3] = lo2 & 0xf; |
| 496 | buffer[4] = ((lo2 & 0x70) >> 4) | ((hi2 & 1) << 3); |
| 497 | buffer[5] = (hi2 & 0x1e) >> 1; |
| 498 | ret = 6; |
| 499 | break; |
| 500 | case 6: |
| 501 | buffer[0] = lo & 0x3f; |
| 502 | buffer[1] = ((lo & 0x40) >> 6) | (hi << 1); |
| 503 | buffer[2] = lo2 & 0x3f; |
| 504 | buffer[3] = ((lo2 & 0x40) >> 6) | (hi2 << 1); |
| 505 | ret = 4; |
| 506 | break; |
| 507 | } |
| 508 | break; |
| 509 | |
| 510 | case QC_UNIDIR: /* Unidirectional Port */ |
| 511 | write_lpcontrol(q, 6); |
| 512 | lo = (qc_waithand(q, 1) & 0xf0) >> 4; |
| 513 | write_lpcontrol(q, 0xe); |
| 514 | hi = (qc_waithand(q, 0) & 0xf0) >> 4; |
| 515 | |
| 516 | switch (q->bpp) { |
| 517 | case 4: |
| 518 | buffer[0] = lo; |
| 519 | buffer[1] = hi; |
| 520 | ret = 2; |
| 521 | break; |
| 522 | case 6: |
| 523 | switch (state) { |
| 524 | case 0: |
| 525 | buffer[0] = (lo << 2) | ((hi & 0xc) >> 2); |
| 526 | q->saved_bits = (hi & 3) << 4; |
| 527 | state = 1; |
| 528 | ret = 1; |
| 529 | break; |
| 530 | case 1: |
| 531 | buffer[0] = lo | q->saved_bits; |
| 532 | q->saved_bits = hi << 2; |
| 533 | state = 2; |
| 534 | ret = 1; |
| 535 | break; |
| 536 | case 2: |
| 537 | buffer[0] = ((lo & 0xc) >> 2) | q->saved_bits; |
| 538 | buffer[1] = ((lo & 3) << 4) | hi; |
| 539 | state = 0; |
| 540 | ret = 2; |
| 541 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | } |
| 543 | break; |
Hans Verkuil | 1d61aac | 2010-03-22 04:36:04 -0300 | [diff] [blame] | 544 | } |
| 545 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | } |
| 547 | return ret; |
| 548 | } |
| 549 | |
| 550 | /* requests a scan from the camera. It sends the correct instructions |
| 551 | * to the camera and then reads back the correct number of bytes. In |
| 552 | * previous versions of this routine the return structure contained |
| 553 | * the raw output from the camera, and there was a 'qc_convertscan' |
| 554 | * function that converted that to a useful format. In version 0.3 I |
| 555 | * rolled qc_convertscan into qc_scan and now I only return the |
| 556 | * converted scan. The format is just an one-dimensional array of |
| 557 | * characters, one for each pixel, with 0=black up to n=white, where |
| 558 | * n=2^(bit depth)-1. Ask me for more details if you don't understand |
| 559 | * this. */ |
| 560 | |
Hans Verkuil | 483d67f | 2010-05-10 03:51:02 -0300 | [diff] [blame] | 561 | static long qc_capture(struct qcam *q, char __user *buf, unsigned long len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | { |
| 563 | int i, j, k, yield; |
| 564 | int bytes; |
| 565 | int linestotrans, transperline; |
| 566 | int divisor; |
| 567 | int pixels_per_line; |
| 568 | int pixels_read = 0; |
Hans Verkuil | 1d61aac | 2010-03-22 04:36:04 -0300 | [diff] [blame] | 569 | int got = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | char buffer[6]; |
Hans Verkuil | 1d61aac | 2010-03-22 04:36:04 -0300 | [diff] [blame] | 571 | int shift = 8 - q->bpp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | char invert; |
| 573 | |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 574 | if (q->mode == -1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | return -ENXIO; |
| 576 | |
| 577 | qc_command(q, 0x7); |
| 578 | qc_command(q, q->mode); |
| 579 | |
Hans Verkuil | 1d61aac | 2010-03-22 04:36:04 -0300 | [diff] [blame] | 580 | if ((q->port_mode & QC_MODE_MASK) == QC_BIDIR) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | write_lpcontrol(q, 0x2e); /* turn port around */ |
| 582 | write_lpcontrol(q, 0x26); |
Hans Verkuil | 1d61aac | 2010-03-22 04:36:04 -0300 | [diff] [blame] | 583 | qc_waithand(q, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | write_lpcontrol(q, 0x2e); |
Hans Verkuil | 1d61aac | 2010-03-22 04:36:04 -0300 | [diff] [blame] | 585 | qc_waithand(q, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 586 | } |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 587 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | /* strange -- should be 15:63 below, but 4bpp is odd */ |
| 589 | invert = (q->bpp == 4) ? 16 : 63; |
| 590 | |
| 591 | linestotrans = q->height / q->transfer_scale; |
| 592 | pixels_per_line = q->width / q->transfer_scale; |
| 593 | transperline = q->width * q->bpp; |
| 594 | divisor = (((q->port_mode & QC_MODE_MASK) == QC_BIDIR) ? 24 : 8) * |
Hans Verkuil | 1d61aac | 2010-03-22 04:36:04 -0300 | [diff] [blame] | 595 | q->transfer_scale; |
Julia Lawall | e9e24ce | 2008-08-20 20:44:53 -0300 | [diff] [blame] | 596 | transperline = DIV_ROUND_UP(transperline, divisor); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 597 | |
Hans Verkuil | 1d61aac | 2010-03-22 04:36:04 -0300 | [diff] [blame] | 598 | for (i = 0, yield = yieldlines; i < linestotrans; i++) { |
| 599 | for (pixels_read = j = 0; j < transperline; j++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | bytes = qc_readbytes(q, buffer); |
Hans Verkuil | 1d61aac | 2010-03-22 04:36:04 -0300 | [diff] [blame] | 601 | for (k = 0; k < bytes && (pixels_read + k) < pixels_per_line; k++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 602 | int o; |
Hans Verkuil | 1d61aac | 2010-03-22 04:36:04 -0300 | [diff] [blame] | 603 | if (buffer[k] == 0 && invert == 16) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 604 | /* 4bpp is odd (again) -- inverter is 16, not 15, but output |
| 605 | must be 0-15 -- bls */ |
| 606 | buffer[k] = 16; |
| 607 | } |
Hans Verkuil | 1d61aac | 2010-03-22 04:36:04 -0300 | [diff] [blame] | 608 | o = i * pixels_per_line + pixels_read + k; |
| 609 | if (o < len) { |
Hans Verkuil | de87897 | 2012-06-06 01:46:50 -0300 | [diff] [blame] | 610 | u8 ch = invert - buffer[k]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | got++; |
Hans Verkuil | de87897 | 2012-06-06 01:46:50 -0300 | [diff] [blame] | 612 | put_user(ch << shift, buf + o); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | } |
| 614 | } |
| 615 | pixels_read += bytes; |
| 616 | } |
Hans Verkuil | 1d61aac | 2010-03-22 04:36:04 -0300 | [diff] [blame] | 617 | qc_readbytes(q, NULL); /* reset state machine */ |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 618 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | /* Grabbing an entire frame from the quickcam is a lengthy |
| 620 | process. We don't (usually) want to busy-block the |
| 621 | processor for the entire frame. yieldlines is a module |
| 622 | parameter. If we yield every line, the minimum frame |
| 623 | time will be 240 / 200 = 1.2 seconds. The compile-time |
| 624 | default is to yield every 4 lines. */ |
| 625 | if (i >= yield) { |
| 626 | msleep_interruptible(5); |
| 627 | yield = i + yieldlines; |
| 628 | } |
| 629 | } |
| 630 | |
Hans Verkuil | 1d61aac | 2010-03-22 04:36:04 -0300 | [diff] [blame] | 631 | if ((q->port_mode & QC_MODE_MASK) == QC_BIDIR) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | write_lpcontrol(q, 2); |
| 633 | write_lpcontrol(q, 6); |
| 634 | udelay(3); |
| 635 | write_lpcontrol(q, 0xe); |
| 636 | } |
Hans Verkuil | 1d61aac | 2010-03-22 04:36:04 -0300 | [diff] [blame] | 637 | if (got < len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | return got; |
| 639 | return len; |
| 640 | } |
| 641 | |
| 642 | /* |
| 643 | * Video4linux interfacing |
| 644 | */ |
| 645 | |
Hans Verkuil | 483d67f | 2010-05-10 03:51:02 -0300 | [diff] [blame] | 646 | static int qcam_querycap(struct file *file, void *priv, |
| 647 | struct v4l2_capability *vcap) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | { |
Hans Verkuil | 483d67f | 2010-05-10 03:51:02 -0300 | [diff] [blame] | 649 | struct qcam *qcam = video_drvdata(file); |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 650 | |
Hans Verkuil | 483d67f | 2010-05-10 03:51:02 -0300 | [diff] [blame] | 651 | strlcpy(vcap->driver, qcam->v4l2_dev.name, sizeof(vcap->driver)); |
Hans Verkuil | de87897 | 2012-06-06 01:46:50 -0300 | [diff] [blame] | 652 | strlcpy(vcap->card, "Connectix B&W Quickcam", sizeof(vcap->card)); |
| 653 | strlcpy(vcap->bus_info, qcam->pport->name, sizeof(vcap->bus_info)); |
Hans Verkuil | 5fa1a89 | 2012-05-08 15:12:41 -0300 | [diff] [blame] | 654 | vcap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE; |
| 655 | vcap->capabilities = vcap->device_caps | V4L2_CAP_DEVICE_CAPS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | return 0; |
| 657 | } |
| 658 | |
Hans Verkuil | 483d67f | 2010-05-10 03:51:02 -0300 | [diff] [blame] | 659 | static int qcam_enum_input(struct file *file, void *fh, struct v4l2_input *vin) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | { |
Hans Verkuil | 483d67f | 2010-05-10 03:51:02 -0300 | [diff] [blame] | 661 | if (vin->index > 0) |
| 662 | return -EINVAL; |
| 663 | strlcpy(vin->name, "Camera", sizeof(vin->name)); |
| 664 | vin->type = V4L2_INPUT_TYPE_CAMERA; |
| 665 | vin->audioset = 0; |
| 666 | vin->tuner = 0; |
| 667 | vin->std = 0; |
| 668 | vin->status = 0; |
| 669 | return 0; |
| 670 | } |
| 671 | |
| 672 | static int qcam_g_input(struct file *file, void *fh, unsigned int *inp) |
| 673 | { |
| 674 | *inp = 0; |
| 675 | return 0; |
| 676 | } |
| 677 | |
| 678 | static int qcam_s_input(struct file *file, void *fh, unsigned int inp) |
| 679 | { |
| 680 | return (inp > 0) ? -EINVAL : 0; |
| 681 | } |
| 682 | |
Hans Verkuil | 483d67f | 2010-05-10 03:51:02 -0300 | [diff] [blame] | 683 | static int qcam_g_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt) |
| 684 | { |
| 685 | struct qcam *qcam = video_drvdata(file); |
| 686 | struct v4l2_pix_format *pix = &fmt->fmt.pix; |
| 687 | |
| 688 | pix->width = qcam->width / qcam->transfer_scale; |
| 689 | pix->height = qcam->height / qcam->transfer_scale; |
| 690 | pix->pixelformat = (qcam->bpp == 4) ? V4L2_PIX_FMT_Y4 : V4L2_PIX_FMT_Y6; |
| 691 | pix->field = V4L2_FIELD_NONE; |
Hans Verkuil | de87897 | 2012-06-06 01:46:50 -0300 | [diff] [blame] | 692 | pix->bytesperline = pix->width; |
| 693 | pix->sizeimage = pix->width * pix->height; |
Hans Verkuil | 483d67f | 2010-05-10 03:51:02 -0300 | [diff] [blame] | 694 | /* Just a guess */ |
| 695 | pix->colorspace = V4L2_COLORSPACE_SRGB; |
| 696 | return 0; |
| 697 | } |
| 698 | |
| 699 | static int qcam_try_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt) |
| 700 | { |
| 701 | struct v4l2_pix_format *pix = &fmt->fmt.pix; |
| 702 | |
| 703 | if (pix->height <= 60 || pix->width <= 80) { |
| 704 | pix->height = 60; |
| 705 | pix->width = 80; |
| 706 | } else if (pix->height <= 120 || pix->width <= 160) { |
| 707 | pix->height = 120; |
| 708 | pix->width = 160; |
| 709 | } else { |
| 710 | pix->height = 240; |
| 711 | pix->width = 320; |
| 712 | } |
| 713 | if (pix->pixelformat != V4L2_PIX_FMT_Y4 && |
| 714 | pix->pixelformat != V4L2_PIX_FMT_Y6) |
| 715 | pix->pixelformat = V4L2_PIX_FMT_Y4; |
| 716 | pix->field = V4L2_FIELD_NONE; |
| 717 | pix->bytesperline = pix->width; |
| 718 | pix->sizeimage = pix->width * pix->height; |
| 719 | /* Just a guess */ |
| 720 | pix->colorspace = V4L2_COLORSPACE_SRGB; |
| 721 | return 0; |
| 722 | } |
| 723 | |
| 724 | static int qcam_s_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt) |
| 725 | { |
| 726 | struct qcam *qcam = video_drvdata(file); |
| 727 | struct v4l2_pix_format *pix = &fmt->fmt.pix; |
| 728 | int ret = qcam_try_fmt_vid_cap(file, fh, fmt); |
| 729 | |
| 730 | if (ret) |
| 731 | return ret; |
| 732 | qcam->width = 320; |
| 733 | qcam->height = 240; |
| 734 | if (pix->height == 60) |
| 735 | qcam->transfer_scale = 4; |
| 736 | else if (pix->height == 120) |
| 737 | qcam->transfer_scale = 2; |
| 738 | else |
| 739 | qcam->transfer_scale = 1; |
| 740 | if (pix->pixelformat == V4L2_PIX_FMT_Y6) |
| 741 | qcam->bpp = 6; |
| 742 | else |
| 743 | qcam->bpp = 4; |
| 744 | |
| 745 | mutex_lock(&qcam->lock); |
| 746 | qc_setscanmode(qcam); |
| 747 | /* We must update the camera before we grab. We could |
| 748 | just have changed the grab size */ |
| 749 | qcam->status |= QC_PARAM_CHANGE; |
| 750 | mutex_unlock(&qcam->lock); |
| 751 | return 0; |
| 752 | } |
| 753 | |
| 754 | static int qcam_enum_fmt_vid_cap(struct file *file, void *fh, struct v4l2_fmtdesc *fmt) |
| 755 | { |
| 756 | static struct v4l2_fmtdesc formats[] = { |
| 757 | { 0, 0, 0, |
| 758 | "4-Bit Monochrome", V4L2_PIX_FMT_Y4, |
| 759 | { 0, 0, 0, 0 } |
| 760 | }, |
Hans Verkuil | de87897 | 2012-06-06 01:46:50 -0300 | [diff] [blame] | 761 | { 1, 0, 0, |
Hans Verkuil | 483d67f | 2010-05-10 03:51:02 -0300 | [diff] [blame] | 762 | "6-Bit Monochrome", V4L2_PIX_FMT_Y6, |
| 763 | { 0, 0, 0, 0 } |
| 764 | }, |
| 765 | }; |
| 766 | enum v4l2_buf_type type = fmt->type; |
| 767 | |
| 768 | if (fmt->index > 1) |
| 769 | return -EINVAL; |
| 770 | |
| 771 | *fmt = formats[fmt->index]; |
| 772 | fmt->type = type; |
| 773 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | } |
| 775 | |
Hans Verkuil | de87897 | 2012-06-06 01:46:50 -0300 | [diff] [blame] | 776 | static int qcam_enum_framesizes(struct file *file, void *fh, |
| 777 | struct v4l2_frmsizeenum *fsize) |
| 778 | { |
| 779 | static const struct v4l2_frmsize_discrete sizes[] = { |
| 780 | { 80, 60 }, |
| 781 | { 160, 120 }, |
| 782 | { 320, 240 }, |
| 783 | }; |
| 784 | |
| 785 | if (fsize->index > 2) |
| 786 | return -EINVAL; |
| 787 | if (fsize->pixel_format != V4L2_PIX_FMT_Y4 && |
| 788 | fsize->pixel_format != V4L2_PIX_FMT_Y6) |
| 789 | return -EINVAL; |
| 790 | fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; |
| 791 | fsize->discrete = sizes[fsize->index]; |
| 792 | return 0; |
| 793 | } |
| 794 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | static ssize_t qcam_read(struct file *file, char __user *buf, |
Hans Verkuil | 1d61aac | 2010-03-22 04:36:04 -0300 | [diff] [blame] | 796 | size_t count, loff_t *ppos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | { |
Hans Verkuil | 483d67f | 2010-05-10 03:51:02 -0300 | [diff] [blame] | 798 | struct qcam *qcam = video_drvdata(file); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 799 | int len; |
| 800 | parport_claim_or_block(qcam->pdev); |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 801 | |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 802 | mutex_lock(&qcam->lock); |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 803 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | qc_reset(qcam); |
| 805 | |
| 806 | /* Update the camera parameters if we need to */ |
| 807 | if (qcam->status & QC_PARAM_CHANGE) |
| 808 | qc_set(qcam); |
| 809 | |
Hans Verkuil | 1d61aac | 2010-03-22 04:36:04 -0300 | [diff] [blame] | 810 | len = qc_capture(qcam, buf, count); |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 811 | |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 812 | mutex_unlock(&qcam->lock); |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 813 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 814 | parport_release(qcam->pdev); |
| 815 | return len; |
| 816 | } |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 817 | |
Hans Verkuil | de87897 | 2012-06-06 01:46:50 -0300 | [diff] [blame] | 818 | static unsigned int qcam_poll(struct file *filp, poll_table *wait) |
| 819 | { |
| 820 | return v4l2_ctrl_poll(filp, wait) | POLLIN | POLLRDNORM; |
| 821 | } |
| 822 | |
Hans Verkuil | 5fa1a89 | 2012-05-08 15:12:41 -0300 | [diff] [blame] | 823 | static int qcam_s_ctrl(struct v4l2_ctrl *ctrl) |
| 824 | { |
| 825 | struct qcam *qcam = |
| 826 | container_of(ctrl->handler, struct qcam, hdl); |
| 827 | int ret = 0; |
| 828 | |
| 829 | mutex_lock(&qcam->lock); |
| 830 | switch (ctrl->id) { |
| 831 | case V4L2_CID_BRIGHTNESS: |
| 832 | qcam->brightness = ctrl->val; |
| 833 | break; |
| 834 | case V4L2_CID_CONTRAST: |
| 835 | qcam->contrast = ctrl->val; |
| 836 | break; |
| 837 | case V4L2_CID_GAMMA: |
| 838 | qcam->whitebal = ctrl->val; |
| 839 | break; |
| 840 | default: |
| 841 | ret = -EINVAL; |
| 842 | break; |
| 843 | } |
| 844 | if (ret == 0) { |
| 845 | qc_setscanmode(qcam); |
| 846 | qcam->status |= QC_PARAM_CHANGE; |
| 847 | } |
| 848 | mutex_unlock(&qcam->lock); |
| 849 | return ret; |
| 850 | } |
| 851 | |
Hans Verkuil | bec4366 | 2008-12-30 06:58:20 -0300 | [diff] [blame] | 852 | static const struct v4l2_file_operations qcam_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | .owner = THIS_MODULE, |
Hans Verkuil | 5fa1a89 | 2012-05-08 15:12:41 -0300 | [diff] [blame] | 854 | .open = v4l2_fh_open, |
| 855 | .release = v4l2_fh_release, |
Hans Verkuil | de87897 | 2012-06-06 01:46:50 -0300 | [diff] [blame] | 856 | .poll = qcam_poll, |
Hans Verkuil | 61df3c9 | 2010-11-14 10:09:38 -0300 | [diff] [blame] | 857 | .unlocked_ioctl = video_ioctl2, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 858 | .read = qcam_read, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 859 | }; |
Hans Verkuil | 483d67f | 2010-05-10 03:51:02 -0300 | [diff] [blame] | 860 | |
| 861 | static const struct v4l2_ioctl_ops qcam_ioctl_ops = { |
| 862 | .vidioc_querycap = qcam_querycap, |
| 863 | .vidioc_g_input = qcam_g_input, |
| 864 | .vidioc_s_input = qcam_s_input, |
| 865 | .vidioc_enum_input = qcam_enum_input, |
Hans Verkuil | 483d67f | 2010-05-10 03:51:02 -0300 | [diff] [blame] | 866 | .vidioc_enum_fmt_vid_cap = qcam_enum_fmt_vid_cap, |
Hans Verkuil | de87897 | 2012-06-06 01:46:50 -0300 | [diff] [blame] | 867 | .vidioc_enum_framesizes = qcam_enum_framesizes, |
Hans Verkuil | 483d67f | 2010-05-10 03:51:02 -0300 | [diff] [blame] | 868 | .vidioc_g_fmt_vid_cap = qcam_g_fmt_vid_cap, |
| 869 | .vidioc_s_fmt_vid_cap = qcam_s_fmt_vid_cap, |
| 870 | .vidioc_try_fmt_vid_cap = qcam_try_fmt_vid_cap, |
Hans Verkuil | 5fa1a89 | 2012-05-08 15:12:41 -0300 | [diff] [blame] | 871 | .vidioc_log_status = v4l2_ctrl_log_status, |
| 872 | .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, |
| 873 | .vidioc_unsubscribe_event = v4l2_event_unsubscribe, |
| 874 | }; |
| 875 | |
| 876 | static const struct v4l2_ctrl_ops qcam_ctrl_ops = { |
| 877 | .s_ctrl = qcam_s_ctrl, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 878 | }; |
| 879 | |
Hans Verkuil | 483d67f | 2010-05-10 03:51:02 -0300 | [diff] [blame] | 880 | /* Initialize the QuickCam driver control structure. This is where |
| 881 | * defaults are set for people who don't have a config file.*/ |
| 882 | |
| 883 | static struct qcam *qcam_init(struct parport *port) |
| 884 | { |
| 885 | struct qcam *qcam; |
| 886 | struct v4l2_device *v4l2_dev; |
| 887 | |
| 888 | qcam = kzalloc(sizeof(struct qcam), GFP_KERNEL); |
| 889 | if (qcam == NULL) |
| 890 | return NULL; |
| 891 | |
| 892 | v4l2_dev = &qcam->v4l2_dev; |
Hans Verkuil | de87897 | 2012-06-06 01:46:50 -0300 | [diff] [blame] | 893 | snprintf(v4l2_dev->name, sizeof(v4l2_dev->name), "bw-qcam%d", num_cams); |
Hans Verkuil | 483d67f | 2010-05-10 03:51:02 -0300 | [diff] [blame] | 894 | |
Hans Verkuil | de87897 | 2012-06-06 01:46:50 -0300 | [diff] [blame] | 895 | if (v4l2_device_register(port->dev, v4l2_dev) < 0) { |
Hans Verkuil | 483d67f | 2010-05-10 03:51:02 -0300 | [diff] [blame] | 896 | v4l2_err(v4l2_dev, "Could not register v4l2_device\n"); |
Julia Lawall | ee893e9 | 2011-07-04 11:11:42 -0300 | [diff] [blame] | 897 | kfree(qcam); |
Hans Verkuil | 483d67f | 2010-05-10 03:51:02 -0300 | [diff] [blame] | 898 | return NULL; |
| 899 | } |
| 900 | |
Hans Verkuil | 5fa1a89 | 2012-05-08 15:12:41 -0300 | [diff] [blame] | 901 | v4l2_ctrl_handler_init(&qcam->hdl, 3); |
| 902 | v4l2_ctrl_new_std(&qcam->hdl, &qcam_ctrl_ops, |
| 903 | V4L2_CID_BRIGHTNESS, 0, 255, 1, 180); |
| 904 | v4l2_ctrl_new_std(&qcam->hdl, &qcam_ctrl_ops, |
| 905 | V4L2_CID_CONTRAST, 0, 255, 1, 192); |
| 906 | v4l2_ctrl_new_std(&qcam->hdl, &qcam_ctrl_ops, |
| 907 | V4L2_CID_GAMMA, 0, 255, 1, 105); |
| 908 | if (qcam->hdl.error) { |
| 909 | v4l2_err(v4l2_dev, "couldn't register controls\n"); |
| 910 | v4l2_ctrl_handler_free(&qcam->hdl); |
| 911 | kfree(qcam); |
| 912 | return NULL; |
| 913 | } |
Hans Verkuil | 483d67f | 2010-05-10 03:51:02 -0300 | [diff] [blame] | 914 | qcam->pport = port; |
Hans Verkuil | de87897 | 2012-06-06 01:46:50 -0300 | [diff] [blame] | 915 | qcam->pdev = parport_register_device(port, v4l2_dev->name, NULL, NULL, |
Hans Verkuil | 483d67f | 2010-05-10 03:51:02 -0300 | [diff] [blame] | 916 | NULL, 0, NULL); |
| 917 | if (qcam->pdev == NULL) { |
| 918 | v4l2_err(v4l2_dev, "couldn't register for %s.\n", port->name); |
Hans Verkuil | 5fa1a89 | 2012-05-08 15:12:41 -0300 | [diff] [blame] | 919 | v4l2_ctrl_handler_free(&qcam->hdl); |
Hans Verkuil | 483d67f | 2010-05-10 03:51:02 -0300 | [diff] [blame] | 920 | kfree(qcam); |
| 921 | return NULL; |
| 922 | } |
| 923 | |
| 924 | strlcpy(qcam->vdev.name, "Connectix QuickCam", sizeof(qcam->vdev.name)); |
| 925 | qcam->vdev.v4l2_dev = v4l2_dev; |
Hans Verkuil | 5fa1a89 | 2012-05-08 15:12:41 -0300 | [diff] [blame] | 926 | qcam->vdev.ctrl_handler = &qcam->hdl; |
Hans Verkuil | 483d67f | 2010-05-10 03:51:02 -0300 | [diff] [blame] | 927 | qcam->vdev.fops = &qcam_fops; |
| 928 | qcam->vdev.ioctl_ops = &qcam_ioctl_ops; |
Hans Verkuil | 5fa1a89 | 2012-05-08 15:12:41 -0300 | [diff] [blame] | 929 | set_bit(V4L2_FL_USE_FH_PRIO, &qcam->vdev.flags); |
Hans Verkuil | 483d67f | 2010-05-10 03:51:02 -0300 | [diff] [blame] | 930 | qcam->vdev.release = video_device_release_empty; |
| 931 | video_set_drvdata(&qcam->vdev, qcam); |
| 932 | |
| 933 | mutex_init(&qcam->lock); |
| 934 | |
| 935 | qcam->port_mode = (QC_ANY | QC_NOTSET); |
| 936 | qcam->width = 320; |
| 937 | qcam->height = 240; |
| 938 | qcam->bpp = 4; |
| 939 | qcam->transfer_scale = 2; |
| 940 | qcam->contrast = 192; |
| 941 | qcam->brightness = 180; |
| 942 | qcam->whitebal = 105; |
| 943 | qcam->top = 1; |
| 944 | qcam->left = 14; |
| 945 | qcam->mode = -1; |
| 946 | qcam->status = QC_PARAM_CHANGE; |
| 947 | return qcam; |
| 948 | } |
| 949 | |
| 950 | static int qc_calibrate(struct qcam *q) |
| 951 | { |
| 952 | /* |
| 953 | * Bugfix by Hanno Mueller hmueller@kabel.de, Mai 21 96 |
| 954 | * The white balance is an individual value for each |
| 955 | * quickcam. |
| 956 | */ |
| 957 | |
| 958 | int value; |
| 959 | int count = 0; |
| 960 | |
| 961 | qc_command(q, 27); /* AutoAdjustOffset */ |
| 962 | qc_command(q, 0); /* Dummy Parameter, ignored by the camera */ |
| 963 | |
| 964 | /* GetOffset (33) will read 255 until autocalibration */ |
| 965 | /* is finished. After that, a value of 1-254 will be */ |
| 966 | /* returned. */ |
| 967 | |
| 968 | do { |
| 969 | qc_command(q, 33); |
| 970 | value = qc_readparam(q); |
| 971 | mdelay(1); |
| 972 | schedule(); |
| 973 | count++; |
| 974 | } while (value == 0xff && count < 2048); |
| 975 | |
| 976 | q->whitebal = value; |
| 977 | return value; |
| 978 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 979 | |
| 980 | static int init_bwqcam(struct parport *port) |
| 981 | { |
Hans Verkuil | 483d67f | 2010-05-10 03:51:02 -0300 | [diff] [blame] | 982 | struct qcam *qcam; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | |
Hans Verkuil | 1d61aac | 2010-03-22 04:36:04 -0300 | [diff] [blame] | 984 | if (num_cams == MAX_CAMS) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 985 | printk(KERN_ERR "Too many Quickcams (max %d)\n", MAX_CAMS); |
| 986 | return -ENOSPC; |
| 987 | } |
| 988 | |
Hans Verkuil | 1d61aac | 2010-03-22 04:36:04 -0300 | [diff] [blame] | 989 | qcam = qcam_init(port); |
| 990 | if (qcam == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 991 | return -ENODEV; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 992 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 993 | parport_claim_or_block(qcam->pdev); |
| 994 | |
| 995 | qc_reset(qcam); |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 996 | |
Hans Verkuil | 1d61aac | 2010-03-22 04:36:04 -0300 | [diff] [blame] | 997 | if (qc_detect(qcam) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 998 | parport_release(qcam->pdev); |
| 999 | parport_unregister_device(qcam->pdev); |
| 1000 | kfree(qcam); |
| 1001 | return -ENODEV; |
| 1002 | } |
| 1003 | qc_calibrate(qcam); |
Hans Verkuil | de87897 | 2012-06-06 01:46:50 -0300 | [diff] [blame] | 1004 | v4l2_ctrl_handler_setup(&qcam->hdl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1005 | |
| 1006 | parport_release(qcam->pdev); |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 1007 | |
Hans Verkuil | 483d67f | 2010-05-10 03:51:02 -0300 | [diff] [blame] | 1008 | v4l2_info(&qcam->v4l2_dev, "Connectix Quickcam on %s\n", qcam->pport->name); |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 1009 | |
Hans Verkuil | dc60de3 | 2008-09-03 17:11:58 -0300 | [diff] [blame] | 1010 | if (video_register_device(&qcam->vdev, VFL_TYPE_GRABBER, video_nr) < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1011 | parport_unregister_device(qcam->pdev); |
| 1012 | kfree(qcam); |
| 1013 | return -ENODEV; |
| 1014 | } |
| 1015 | |
| 1016 | qcams[num_cams++] = qcam; |
| 1017 | |
| 1018 | return 0; |
| 1019 | } |
| 1020 | |
Hans Verkuil | 483d67f | 2010-05-10 03:51:02 -0300 | [diff] [blame] | 1021 | static void close_bwqcam(struct qcam *qcam) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1022 | { |
| 1023 | video_unregister_device(&qcam->vdev); |
Hans Verkuil | 5fa1a89 | 2012-05-08 15:12:41 -0300 | [diff] [blame] | 1024 | v4l2_ctrl_handler_free(&qcam->hdl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1025 | parport_unregister_device(qcam->pdev); |
| 1026 | kfree(qcam); |
| 1027 | } |
| 1028 | |
| 1029 | /* The parport parameter controls which parports will be scanned. |
| 1030 | * Scanning all parports causes some printers to print a garbage page. |
| 1031 | * -- March 14, 1999 Billy Donahue <billy@escape.com> */ |
| 1032 | #ifdef MODULE |
| 1033 | static char *parport[MAX_CAMS] = { NULL, }; |
| 1034 | module_param_array(parport, charp, NULL, 0); |
| 1035 | #endif |
| 1036 | |
| 1037 | static int accept_bwqcam(struct parport *port) |
| 1038 | { |
| 1039 | #ifdef MODULE |
| 1040 | int n; |
| 1041 | |
| 1042 | if (parport[0] && strncmp(parport[0], "auto", 4) != 0) { |
| 1043 | /* user gave parport parameters */ |
Roel Kluin | bb2b454 | 2009-08-10 22:07:54 -0300 | [diff] [blame] | 1044 | for (n = 0; n < MAX_CAMS && parport[n]; n++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1045 | char *ep; |
| 1046 | unsigned long r; |
| 1047 | r = simple_strtoul(parport[n], &ep, 0); |
| 1048 | if (ep == parport[n]) { |
| 1049 | printk(KERN_ERR |
| 1050 | "bw-qcam: bad port specifier \"%s\"\n", |
| 1051 | parport[n]); |
| 1052 | continue; |
| 1053 | } |
| 1054 | if (r == port->number) |
| 1055 | return 1; |
| 1056 | } |
| 1057 | return 0; |
| 1058 | } |
| 1059 | #endif |
| 1060 | return 1; |
| 1061 | } |
| 1062 | |
| 1063 | static void bwqcam_attach(struct parport *port) |
| 1064 | { |
| 1065 | if (accept_bwqcam(port)) |
| 1066 | init_bwqcam(port); |
| 1067 | } |
| 1068 | |
| 1069 | static void bwqcam_detach(struct parport *port) |
| 1070 | { |
| 1071 | int i; |
| 1072 | for (i = 0; i < num_cams; i++) { |
Hans Verkuil | 483d67f | 2010-05-10 03:51:02 -0300 | [diff] [blame] | 1073 | struct qcam *qcam = qcams[i]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1074 | if (qcam && qcam->pdev->port == port) { |
| 1075 | qcams[i] = NULL; |
| 1076 | close_bwqcam(qcam); |
| 1077 | } |
| 1078 | } |
| 1079 | } |
| 1080 | |
| 1081 | static struct parport_driver bwqcam_driver = { |
| 1082 | .name = "bw-qcam", |
| 1083 | .attach = bwqcam_attach, |
| 1084 | .detach = bwqcam_detach, |
| 1085 | }; |
| 1086 | |
| 1087 | static void __exit exit_bw_qcams(void) |
| 1088 | { |
| 1089 | parport_unregister_driver(&bwqcam_driver); |
| 1090 | } |
| 1091 | |
| 1092 | static int __init init_bw_qcams(void) |
| 1093 | { |
| 1094 | #ifdef MODULE |
| 1095 | /* Do some sanity checks on the module parameters. */ |
| 1096 | if (maxpoll > 5000) { |
Hans Verkuil | 1d61aac | 2010-03-22 04:36:04 -0300 | [diff] [blame] | 1097 | printk(KERN_INFO "Connectix Quickcam max-poll was above 5000. Using 5000.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1098 | maxpoll = 5000; |
| 1099 | } |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 1100 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1101 | if (yieldlines < 1) { |
Hans Verkuil | 1d61aac | 2010-03-22 04:36:04 -0300 | [diff] [blame] | 1102 | printk(KERN_INFO "Connectix Quickcam yieldlines was less than 1. Using 1.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1103 | yieldlines = 1; |
| 1104 | } |
| 1105 | #endif |
| 1106 | return parport_register_driver(&bwqcam_driver); |
| 1107 | } |
| 1108 | |
| 1109 | module_init(init_bw_qcams); |
| 1110 | module_exit(exit_bw_qcams); |
| 1111 | |
| 1112 | MODULE_LICENSE("GPL"); |
Mauro Carvalho Chehab | 1990d50 | 2011-06-24 14:45:49 -0300 | [diff] [blame] | 1113 | MODULE_VERSION("0.0.3"); |