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> |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 36 | #include <linux/mutex.h> |
Julia Lawall | 168c626 | 2008-04-16 16:13:15 -0300 | [diff] [blame] | 37 | #include <linux/jiffies.h> |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 38 | #include <linux/version.h> |
| 39 | #include <linux/videodev2.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | #include <asm/uaccess.h> |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 41 | #include <media/v4l2-device.h> |
| 42 | #include <media/v4l2-common.h> |
| 43 | #include <media/v4l2-ioctl.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 45 | struct qcam { |
| 46 | struct v4l2_device v4l2_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | struct video_device vdev; |
| 48 | struct pardevice *pdev; |
| 49 | struct parport *pport; |
| 50 | int width, height; |
| 51 | int ccd_width, ccd_height; |
| 52 | int mode; |
| 53 | int contrast, brightness, whitebal; |
| 54 | int top, left; |
| 55 | unsigned int bidirectional; |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 56 | struct mutex lock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | }; |
| 58 | |
| 59 | /* cameras maximum */ |
| 60 | #define MAX_CAMS 4 |
| 61 | |
| 62 | /* The three possible QuickCam modes */ |
| 63 | #define QC_MILLIONS 0x18 |
| 64 | #define QC_BILLIONS 0x10 |
| 65 | #define QC_THOUSANDS 0x08 /* with VIDEC compression (not supported) */ |
| 66 | |
| 67 | /* The three possible decimations */ |
| 68 | #define QC_DECIMATION_1 0 |
| 69 | #define QC_DECIMATION_2 2 |
| 70 | #define QC_DECIMATION_4 4 |
| 71 | |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 72 | #define BANNER "Colour QuickCam for Video4Linux v0.06" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | |
| 74 | static int parport[MAX_CAMS] = { [1 ... MAX_CAMS-1] = -1 }; |
| 75 | static int probe = 2; |
Douglas Schilling Landgraf | ff699e6 | 2008-04-22 14:41:48 -0300 | [diff] [blame] | 76 | static int force_rgb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | static int video_nr = -1; |
| 78 | |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 79 | /* FIXME: parport=auto would never have worked, surely? --RR */ |
| 80 | MODULE_PARM_DESC(parport, "parport=<auto|n[,n]...> for port detection method\n" |
| 81 | "probe=<0|1|2> for camera detection method\n" |
| 82 | "force_rgb=<0|1> for RGB data format (default BGR)"); |
| 83 | module_param_array(parport, int, NULL, 0); |
| 84 | module_param(probe, int, 0); |
| 85 | module_param(force_rgb, bool, 0); |
| 86 | module_param(video_nr, int, 0); |
| 87 | |
| 88 | static struct qcam *qcams[MAX_CAMS]; |
| 89 | static unsigned int num_cams; |
| 90 | |
| 91 | static inline void qcam_set_ack(struct qcam *qcam, unsigned int i) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | { |
| 93 | /* note: the QC specs refer to the PCAck pin by voltage, not |
| 94 | software level. PC ports have builtin inverters. */ |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 95 | parport_frob_control(qcam->pport, 8, i ? 8 : 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | } |
| 97 | |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 98 | static inline unsigned int qcam_ready1(struct qcam *qcam) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | { |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 100 | return (parport_read_status(qcam->pport) & 0x8) ? 1 : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | } |
| 102 | |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 103 | static inline unsigned int qcam_ready2(struct qcam *qcam) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | { |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 105 | return (parport_read_data(qcam->pport) & 0x1) ? 1 : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | } |
| 107 | |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 108 | static unsigned int qcam_await_ready1(struct qcam *qcam, int value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | { |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 110 | struct v4l2_device *v4l2_dev = &qcam->v4l2_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | unsigned long oldjiffies = jiffies; |
| 112 | unsigned int i; |
| 113 | |
Julia Lawall | 168c626 | 2008-04-16 16:13:15 -0300 | [diff] [blame] | 114 | for (oldjiffies = jiffies; |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 115 | time_before(jiffies, oldjiffies + msecs_to_jiffies(40));) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | if (qcam_ready1(qcam) == value) |
| 117 | return 0; |
| 118 | |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 119 | /* If the camera didn't respond within 1/25 second, poll slowly |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | for a while. */ |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 121 | for (i = 0; i < 50; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | if (qcam_ready1(qcam) == value) |
| 123 | return 0; |
| 124 | msleep_interruptible(100); |
| 125 | } |
| 126 | |
| 127 | /* Probably somebody pulled the plug out. Not much we can do. */ |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 128 | v4l2_err(v4l2_dev, "ready1 timeout (%d) %x %x\n", value, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | parport_read_status(qcam->pport), |
| 130 | parport_read_control(qcam->pport)); |
| 131 | return 1; |
| 132 | } |
| 133 | |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 134 | static unsigned int qcam_await_ready2(struct qcam *qcam, int value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | { |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 136 | struct v4l2_device *v4l2_dev = &qcam->v4l2_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | unsigned long oldjiffies = jiffies; |
| 138 | unsigned int i; |
| 139 | |
Julia Lawall | 168c626 | 2008-04-16 16:13:15 -0300 | [diff] [blame] | 140 | for (oldjiffies = jiffies; |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 141 | time_before(jiffies, oldjiffies + msecs_to_jiffies(40));) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | if (qcam_ready2(qcam) == value) |
| 143 | return 0; |
| 144 | |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 145 | /* If the camera didn't respond within 1/25 second, poll slowly |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | for a while. */ |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 147 | for (i = 0; i < 50; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | if (qcam_ready2(qcam) == value) |
| 149 | return 0; |
| 150 | msleep_interruptible(100); |
| 151 | } |
| 152 | |
| 153 | /* Probably somebody pulled the plug out. Not much we can do. */ |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 154 | v4l2_err(v4l2_dev, "ready2 timeout (%d) %x %x %x\n", value, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | parport_read_status(qcam->pport), |
| 156 | parport_read_control(qcam->pport), |
| 157 | parport_read_data(qcam->pport)); |
| 158 | return 1; |
| 159 | } |
| 160 | |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 161 | static int qcam_read_data(struct qcam *qcam) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | { |
| 163 | unsigned int idata; |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 164 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | qcam_set_ack(qcam, 0); |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 166 | if (qcam_await_ready1(qcam, 1)) |
| 167 | return -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | idata = parport_read_status(qcam->pport) & 0xf0; |
| 169 | qcam_set_ack(qcam, 1); |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 170 | if (qcam_await_ready1(qcam, 0)) |
| 171 | return -1; |
| 172 | idata |= parport_read_status(qcam->pport) >> 4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | return idata; |
| 174 | } |
| 175 | |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 176 | static int qcam_write_data(struct qcam *qcam, unsigned int data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | { |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 178 | struct v4l2_device *v4l2_dev = &qcam->v4l2_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | unsigned int idata; |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 180 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | parport_write_data(qcam->pport, data); |
| 182 | idata = qcam_read_data(qcam); |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 183 | if (data != idata) { |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 184 | v4l2_warn(v4l2_dev, "sent %x but received %x\n", data, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | idata); |
| 186 | return 1; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 187 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | return 0; |
| 189 | } |
| 190 | |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 191 | static inline int qcam_set(struct qcam *qcam, unsigned int cmd, unsigned int data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | { |
| 193 | if (qcam_write_data(qcam, cmd)) |
| 194 | return -1; |
| 195 | if (qcam_write_data(qcam, data)) |
| 196 | return -1; |
| 197 | return 0; |
| 198 | } |
| 199 | |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 200 | static inline int qcam_get(struct qcam *qcam, unsigned int cmd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | { |
| 202 | if (qcam_write_data(qcam, cmd)) |
| 203 | return -1; |
| 204 | return qcam_read_data(qcam); |
| 205 | } |
| 206 | |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 207 | static int qc_detect(struct qcam *qcam) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | { |
| 209 | unsigned int stat, ostat, i, count = 0; |
| 210 | |
| 211 | /* The probe routine below is not very reliable. The IEEE-1284 |
| 212 | probe takes precedence. */ |
| 213 | /* XXX Currently parport provides no way to distinguish between |
| 214 | "the IEEE probe was not done" and "the probe was done, but |
| 215 | no device was found". Fix this one day. */ |
| 216 | if (qcam->pport->probe_info[0].class == PARPORT_CLASS_MEDIA |
| 217 | && qcam->pport->probe_info[0].model |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 218 | && !strcmp(qcam->pdev->port->probe_info[0].model, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | "Color QuickCam 2.0")) { |
| 220 | printk(KERN_DEBUG "QuickCam: Found by IEEE1284 probe.\n"); |
| 221 | return 1; |
| 222 | } |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 223 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | if (probe < 2) |
| 225 | return 0; |
| 226 | |
| 227 | parport_write_control(qcam->pport, 0xc); |
| 228 | |
| 229 | /* look for a heartbeat */ |
| 230 | ostat = stat = parport_read_status(qcam->pport); |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 231 | for (i = 0; i < 250; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | mdelay(1); |
| 233 | stat = parport_read_status(qcam->pport); |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 234 | if (ostat != stat) { |
| 235 | if (++count >= 3) |
| 236 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | ostat = stat; |
| 238 | } |
| 239 | } |
| 240 | |
| 241 | /* Reset the camera and try again */ |
| 242 | parport_write_control(qcam->pport, 0xc); |
| 243 | parport_write_control(qcam->pport, 0x8); |
| 244 | mdelay(1); |
| 245 | parport_write_control(qcam->pport, 0xc); |
| 246 | mdelay(1); |
| 247 | count = 0; |
| 248 | |
| 249 | ostat = stat = parport_read_status(qcam->pport); |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 250 | for (i = 0; i < 250; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | mdelay(1); |
| 252 | stat = parport_read_status(qcam->pport); |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 253 | if (ostat != stat) { |
| 254 | if (++count >= 3) |
| 255 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | ostat = stat; |
| 257 | } |
| 258 | } |
| 259 | |
| 260 | /* no (or flatline) camera, give up */ |
| 261 | return 0; |
| 262 | } |
| 263 | |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 264 | static void qc_reset(struct qcam *qcam) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | { |
| 266 | parport_write_control(qcam->pport, 0xc); |
| 267 | parport_write_control(qcam->pport, 0x8); |
| 268 | mdelay(1); |
| 269 | parport_write_control(qcam->pport, 0xc); |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 270 | mdelay(1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | } |
| 272 | |
| 273 | /* Reset the QuickCam and program for brightness, contrast, |
| 274 | * white-balance, and resolution. */ |
| 275 | |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 276 | static void qc_setup(struct qcam *qcam) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | { |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 278 | qc_reset(qcam); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 280 | /* Set the brightness. */ |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 281 | qcam_set(qcam, 11, qcam->brightness); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | |
| 283 | /* Set the height and width. These refer to the actual |
| 284 | CCD area *before* applying the selected decimation. */ |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 285 | qcam_set(qcam, 17, qcam->ccd_height); |
| 286 | qcam_set(qcam, 19, qcam->ccd_width / 2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | |
| 288 | /* Set top and left. */ |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 289 | qcam_set(qcam, 0xd, qcam->top); |
| 290 | qcam_set(qcam, 0xf, qcam->left); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | |
| 292 | /* Set contrast and white balance. */ |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 293 | qcam_set(qcam, 0x19, qcam->contrast); |
| 294 | qcam_set(qcam, 0x1f, qcam->whitebal); |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 295 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | /* Set the speed. */ |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 297 | qcam_set(qcam, 45, 2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | } |
| 299 | |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 300 | /* Read some bytes from the camera and put them in the buffer. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | nbytes should be a multiple of 3, because bidirectional mode gives |
| 302 | us three bytes at a time. */ |
| 303 | |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 304 | static unsigned int qcam_read_bytes(struct qcam *qcam, unsigned char *buf, unsigned int nbytes) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | { |
| 306 | unsigned int bytes = 0; |
| 307 | |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 308 | qcam_set_ack(qcam, 0); |
| 309 | if (qcam->bidirectional) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | /* It's a bidirectional port */ |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 311 | while (bytes < nbytes) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | unsigned int lo1, hi1, lo2, hi2; |
| 313 | unsigned char r, g, b; |
| 314 | |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 315 | if (qcam_await_ready2(qcam, 1)) |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 316 | return bytes; |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 317 | lo1 = parport_read_data(qcam->pport) >> 1; |
| 318 | hi1 = ((parport_read_status(qcam->pport) >> 3) & 0x1f) ^ 0x10; |
| 319 | qcam_set_ack(qcam, 1); |
| 320 | if (qcam_await_ready2(qcam, 0)) |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 321 | return bytes; |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 322 | lo2 = parport_read_data(qcam->pport) >> 1; |
| 323 | hi2 = ((parport_read_status(qcam->pport) >> 3) & 0x1f) ^ 0x10; |
| 324 | qcam_set_ack(qcam, 0); |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 325 | r = lo1 | ((hi1 & 1) << 7); |
| 326 | g = ((hi1 & 0x1e) << 3) | ((hi2 & 0x1e) >> 1); |
| 327 | b = lo2 | ((hi2 & 1) << 7); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | if (force_rgb) { |
| 329 | buf[bytes++] = r; |
| 330 | buf[bytes++] = g; |
| 331 | buf[bytes++] = b; |
| 332 | } else { |
| 333 | buf[bytes++] = b; |
| 334 | buf[bytes++] = g; |
| 335 | buf[bytes++] = r; |
| 336 | } |
| 337 | } |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 338 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | /* It's a unidirectional port */ |
| 340 | int i = 0, n = bytes; |
| 341 | unsigned char rgb[3]; |
| 342 | |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 343 | while (bytes < nbytes) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | unsigned int hi, lo; |
| 345 | |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 346 | if (qcam_await_ready1(qcam, 1)) |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 347 | return bytes; |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 348 | hi = (parport_read_status(qcam->pport) & 0xf0); |
| 349 | qcam_set_ack(qcam, 1); |
| 350 | if (qcam_await_ready1(qcam, 0)) |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 351 | return bytes; |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 352 | lo = (parport_read_status(qcam->pport) & 0xf0); |
| 353 | qcam_set_ack(qcam, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | /* flip some bits */ |
| 355 | rgb[(i = bytes++ % 3)] = (hi | (lo >> 4)) ^ 0x88; |
| 356 | if (i >= 2) { |
| 357 | get_fragment: |
| 358 | if (force_rgb) { |
| 359 | buf[n++] = rgb[0]; |
| 360 | buf[n++] = rgb[1]; |
| 361 | buf[n++] = rgb[2]; |
| 362 | } else { |
| 363 | buf[n++] = rgb[2]; |
| 364 | buf[n++] = rgb[1]; |
| 365 | buf[n++] = rgb[0]; |
| 366 | } |
| 367 | } |
| 368 | } |
| 369 | if (i) { |
| 370 | i = 0; |
| 371 | goto get_fragment; |
| 372 | } |
| 373 | } |
| 374 | return bytes; |
| 375 | } |
| 376 | |
| 377 | #define BUFSZ 150 |
| 378 | |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 379 | static long qc_capture(struct qcam *qcam, char __user *buf, unsigned long len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | { |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 381 | struct v4l2_device *v4l2_dev = &qcam->v4l2_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | unsigned lines, pixelsperline, bitsperxfer; |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 383 | unsigned int is_bi_dir = qcam->bidirectional; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | size_t wantlen, outptr = 0; |
| 385 | char tmpbuf[BUFSZ]; |
| 386 | |
| 387 | if (!access_ok(VERIFY_WRITE, buf, len)) |
| 388 | return -EFAULT; |
| 389 | |
| 390 | /* Wait for camera to become ready */ |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 391 | for (;;) { |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 392 | int i = qcam_get(qcam, 41); |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 393 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | if (i == -1) { |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 395 | qc_setup(qcam); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | return -EIO; |
| 397 | } |
| 398 | if ((i & 0x80) == 0) |
| 399 | break; |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 400 | schedule(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | } |
| 402 | |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 403 | if (qcam_set(qcam, 7, (qcam->mode | (is_bi_dir ? 1 : 0)) + 1)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | return -EIO; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 405 | |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 406 | lines = qcam->height; |
| 407 | pixelsperline = qcam->width; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | bitsperxfer = (is_bi_dir) ? 24 : 8; |
| 409 | |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 410 | if (is_bi_dir) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | /* Turn the port around */ |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 412 | parport_data_reverse(qcam->pport); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | mdelay(3); |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 414 | qcam_set_ack(qcam, 0); |
| 415 | if (qcam_await_ready1(qcam, 1)) { |
| 416 | qc_setup(qcam); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | return -EIO; |
| 418 | } |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 419 | qcam_set_ack(qcam, 1); |
| 420 | if (qcam_await_ready1(qcam, 0)) { |
| 421 | qc_setup(qcam); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | return -EIO; |
| 423 | } |
| 424 | } |
| 425 | |
| 426 | wantlen = lines * pixelsperline * 24 / 8; |
| 427 | |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 428 | while (wantlen) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | size_t t, s; |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 430 | |
| 431 | s = (wantlen > BUFSZ) ? BUFSZ : wantlen; |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 432 | t = qcam_read_bytes(qcam, tmpbuf, s); |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 433 | if (outptr < len) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | size_t sz = len - outptr; |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 435 | |
| 436 | if (sz > t) |
| 437 | sz = t; |
| 438 | if (__copy_to_user(buf + outptr, tmpbuf, sz)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | break; |
| 440 | outptr += sz; |
| 441 | } |
| 442 | wantlen -= t; |
| 443 | if (t < s) |
| 444 | break; |
| 445 | cond_resched(); |
| 446 | } |
| 447 | |
| 448 | len = outptr; |
| 449 | |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 450 | if (wantlen) { |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 451 | v4l2_err(v4l2_dev, "short read.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | if (is_bi_dir) |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 453 | parport_data_forward(qcam->pport); |
| 454 | qc_setup(qcam); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | return len; |
| 456 | } |
| 457 | |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 458 | if (is_bi_dir) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | int l; |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 460 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | do { |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 462 | l = qcam_read_bytes(qcam, tmpbuf, 3); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | cond_resched(); |
| 464 | } while (l && (tmpbuf[0] == 0x7e || tmpbuf[1] == 0x7e || tmpbuf[2] == 0x7e)); |
| 465 | if (force_rgb) { |
| 466 | if (tmpbuf[0] != 0xe || tmpbuf[1] != 0x0 || tmpbuf[2] != 0xf) |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 467 | v4l2_err(v4l2_dev, "bad EOF\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | } else { |
| 469 | if (tmpbuf[0] != 0xf || tmpbuf[1] != 0x0 || tmpbuf[2] != 0xe) |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 470 | v4l2_err(v4l2_dev, "bad EOF\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | } |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 472 | qcam_set_ack(qcam, 0); |
| 473 | if (qcam_await_ready1(qcam, 1)) { |
| 474 | v4l2_err(v4l2_dev, "no ack after EOF\n"); |
| 475 | parport_data_forward(qcam->pport); |
| 476 | qc_setup(qcam); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | return len; |
| 478 | } |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 479 | parport_data_forward(qcam->pport); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | mdelay(3); |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 481 | qcam_set_ack(qcam, 1); |
| 482 | if (qcam_await_ready1(qcam, 0)) { |
| 483 | v4l2_err(v4l2_dev, "no ack to port turnaround\n"); |
| 484 | qc_setup(qcam); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | return len; |
| 486 | } |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 487 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | int l; |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 489 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | do { |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 491 | l = qcam_read_bytes(qcam, tmpbuf, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | cond_resched(); |
| 493 | } while (l && tmpbuf[0] == 0x7e); |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 494 | l = qcam_read_bytes(qcam, tmpbuf + 1, 2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | if (force_rgb) { |
| 496 | if (tmpbuf[0] != 0xe || tmpbuf[1] != 0x0 || tmpbuf[2] != 0xf) |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 497 | v4l2_err(v4l2_dev, "bad EOF\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | } else { |
| 499 | if (tmpbuf[0] != 0xf || tmpbuf[1] != 0x0 || tmpbuf[2] != 0xe) |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 500 | v4l2_err(v4l2_dev, "bad EOF\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | } |
| 502 | } |
| 503 | |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 504 | qcam_write_data(qcam, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | return len; |
| 506 | } |
| 507 | |
| 508 | /* |
| 509 | * Video4linux interfacing |
| 510 | */ |
| 511 | |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 512 | static int qcam_querycap(struct file *file, void *priv, |
| 513 | struct v4l2_capability *vcap) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | { |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 515 | struct qcam *qcam = video_drvdata(file); |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 516 | |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 517 | strlcpy(vcap->driver, qcam->v4l2_dev.name, sizeof(vcap->driver)); |
| 518 | strlcpy(vcap->card, "Color Quickcam", sizeof(vcap->card)); |
| 519 | strlcpy(vcap->bus_info, "parport", sizeof(vcap->bus_info)); |
| 520 | vcap->version = KERNEL_VERSION(0, 0, 3); |
| 521 | vcap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | return 0; |
| 523 | } |
| 524 | |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 525 | 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] | 526 | { |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 527 | if (vin->index > 0) |
| 528 | return -EINVAL; |
| 529 | strlcpy(vin->name, "Camera", sizeof(vin->name)); |
| 530 | vin->type = V4L2_INPUT_TYPE_CAMERA; |
| 531 | vin->audioset = 0; |
| 532 | vin->tuner = 0; |
| 533 | vin->std = 0; |
| 534 | vin->status = 0; |
| 535 | return 0; |
| 536 | } |
| 537 | |
| 538 | static int qcam_g_input(struct file *file, void *fh, unsigned int *inp) |
| 539 | { |
| 540 | *inp = 0; |
| 541 | return 0; |
| 542 | } |
| 543 | |
| 544 | static int qcam_s_input(struct file *file, void *fh, unsigned int inp) |
| 545 | { |
| 546 | return (inp > 0) ? -EINVAL : 0; |
| 547 | } |
| 548 | |
| 549 | static int qcam_queryctrl(struct file *file, void *priv, |
| 550 | struct v4l2_queryctrl *qc) |
| 551 | { |
| 552 | switch (qc->id) { |
| 553 | case V4L2_CID_BRIGHTNESS: |
| 554 | return v4l2_ctrl_query_fill(qc, 0, 255, 1, 240); |
| 555 | case V4L2_CID_CONTRAST: |
| 556 | return v4l2_ctrl_query_fill(qc, 0, 255, 1, 192); |
| 557 | case V4L2_CID_GAMMA: |
| 558 | return v4l2_ctrl_query_fill(qc, 0, 255, 1, 128); |
| 559 | } |
| 560 | return -EINVAL; |
| 561 | } |
| 562 | |
| 563 | static int qcam_g_ctrl(struct file *file, void *priv, |
| 564 | struct v4l2_control *ctrl) |
| 565 | { |
| 566 | struct qcam *qcam = video_drvdata(file); |
| 567 | int ret = 0; |
| 568 | |
| 569 | switch (ctrl->id) { |
| 570 | case V4L2_CID_BRIGHTNESS: |
| 571 | ctrl->value = qcam->brightness; |
| 572 | break; |
| 573 | case V4L2_CID_CONTRAST: |
| 574 | ctrl->value = qcam->contrast; |
| 575 | break; |
| 576 | case V4L2_CID_GAMMA: |
| 577 | ctrl->value = qcam->whitebal; |
| 578 | break; |
| 579 | default: |
| 580 | ret = -EINVAL; |
| 581 | break; |
| 582 | } |
| 583 | return ret; |
| 584 | } |
| 585 | |
| 586 | static int qcam_s_ctrl(struct file *file, void *priv, |
| 587 | struct v4l2_control *ctrl) |
| 588 | { |
| 589 | struct qcam *qcam = video_drvdata(file); |
| 590 | int ret = 0; |
| 591 | |
| 592 | mutex_lock(&qcam->lock); |
| 593 | switch (ctrl->id) { |
| 594 | case V4L2_CID_BRIGHTNESS: |
| 595 | qcam->brightness = ctrl->value; |
| 596 | break; |
| 597 | case V4L2_CID_CONTRAST: |
| 598 | qcam->contrast = ctrl->value; |
| 599 | break; |
| 600 | case V4L2_CID_GAMMA: |
| 601 | qcam->whitebal = ctrl->value; |
| 602 | break; |
| 603 | default: |
| 604 | ret = -EINVAL; |
| 605 | break; |
| 606 | } |
| 607 | if (ret == 0) { |
| 608 | parport_claim_or_block(qcam->pdev); |
| 609 | qc_setup(qcam); |
| 610 | parport_release(qcam->pdev); |
| 611 | } |
| 612 | mutex_unlock(&qcam->lock); |
| 613 | return ret; |
| 614 | } |
| 615 | |
| 616 | static int qcam_g_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt) |
| 617 | { |
| 618 | struct qcam *qcam = video_drvdata(file); |
| 619 | struct v4l2_pix_format *pix = &fmt->fmt.pix; |
| 620 | |
| 621 | pix->width = qcam->width; |
| 622 | pix->height = qcam->height; |
| 623 | pix->pixelformat = V4L2_PIX_FMT_RGB24; |
| 624 | pix->field = V4L2_FIELD_NONE; |
| 625 | pix->bytesperline = 3 * qcam->width; |
| 626 | pix->sizeimage = 3 * qcam->width * qcam->height; |
| 627 | /* Just a guess */ |
| 628 | pix->colorspace = V4L2_COLORSPACE_SRGB; |
| 629 | return 0; |
| 630 | } |
| 631 | |
| 632 | static int qcam_try_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt) |
| 633 | { |
| 634 | struct v4l2_pix_format *pix = &fmt->fmt.pix; |
| 635 | |
| 636 | if (pix->height < 60 || pix->width < 80) { |
| 637 | pix->height = 60; |
| 638 | pix->width = 80; |
| 639 | } else if (pix->height < 120 || pix->width < 160) { |
| 640 | pix->height = 120; |
| 641 | pix->width = 160; |
| 642 | } else { |
| 643 | pix->height = 240; |
| 644 | pix->width = 320; |
| 645 | } |
| 646 | pix->pixelformat = V4L2_PIX_FMT_RGB24; |
| 647 | pix->field = V4L2_FIELD_NONE; |
| 648 | pix->bytesperline = 3 * pix->width; |
| 649 | pix->sizeimage = 3 * pix->width * pix->height; |
| 650 | /* Just a guess */ |
| 651 | pix->colorspace = V4L2_COLORSPACE_SRGB; |
| 652 | return 0; |
| 653 | } |
| 654 | |
| 655 | static int qcam_s_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt) |
| 656 | { |
| 657 | struct qcam *qcam = video_drvdata(file); |
| 658 | struct v4l2_pix_format *pix = &fmt->fmt.pix; |
| 659 | int ret = qcam_try_fmt_vid_cap(file, fh, fmt); |
| 660 | |
| 661 | if (ret) |
| 662 | return ret; |
| 663 | switch (pix->height) { |
| 664 | case 60: |
| 665 | qcam->mode = QC_DECIMATION_4; |
| 666 | break; |
| 667 | case 120: |
| 668 | qcam->mode = QC_DECIMATION_2; |
| 669 | break; |
| 670 | default: |
| 671 | qcam->mode = QC_DECIMATION_1; |
| 672 | break; |
| 673 | } |
| 674 | |
| 675 | mutex_lock(&qcam->lock); |
| 676 | qcam->mode |= QC_MILLIONS; |
| 677 | qcam->height = pix->height; |
| 678 | qcam->width = pix->width; |
| 679 | parport_claim_or_block(qcam->pdev); |
| 680 | qc_setup(qcam); |
| 681 | parport_release(qcam->pdev); |
| 682 | mutex_unlock(&qcam->lock); |
| 683 | return 0; |
| 684 | } |
| 685 | |
| 686 | static int qcam_enum_fmt_vid_cap(struct file *file, void *fh, struct v4l2_fmtdesc *fmt) |
| 687 | { |
| 688 | static struct v4l2_fmtdesc formats[] = { |
| 689 | { 0, 0, 0, |
| 690 | "RGB 8:8:8", V4L2_PIX_FMT_RGB24, |
| 691 | { 0, 0, 0, 0 } |
| 692 | }, |
| 693 | }; |
| 694 | enum v4l2_buf_type type = fmt->type; |
| 695 | |
| 696 | if (fmt->index > 0) |
| 697 | return -EINVAL; |
| 698 | |
| 699 | *fmt = formats[fmt->index]; |
| 700 | fmt->type = type; |
| 701 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 702 | } |
| 703 | |
| 704 | static ssize_t qcam_read(struct file *file, char __user *buf, |
| 705 | size_t count, loff_t *ppos) |
| 706 | { |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 707 | struct qcam *qcam = video_drvdata(file); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | int len; |
| 709 | |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 710 | mutex_lock(&qcam->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | parport_claim_or_block(qcam->pdev); |
| 712 | /* Probably should have a semaphore against multiple users */ |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 713 | len = qc_capture(qcam, buf, count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 714 | parport_release(qcam->pdev); |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 715 | mutex_unlock(&qcam->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 716 | return len; |
| 717 | } |
| 718 | |
Hans Verkuil | bec4366 | 2008-12-30 06:58:20 -0300 | [diff] [blame] | 719 | static const struct v4l2_file_operations qcam_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | .owner = THIS_MODULE, |
Hans Verkuil | 61df3c9 | 2010-11-14 10:09:38 -0300 | [diff] [blame^] | 721 | .unlocked_ioctl = video_ioctl2, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | .read = qcam_read, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | }; |
| 724 | |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 725 | static const struct v4l2_ioctl_ops qcam_ioctl_ops = { |
| 726 | .vidioc_querycap = qcam_querycap, |
| 727 | .vidioc_g_input = qcam_g_input, |
| 728 | .vidioc_s_input = qcam_s_input, |
| 729 | .vidioc_enum_input = qcam_enum_input, |
| 730 | .vidioc_queryctrl = qcam_queryctrl, |
| 731 | .vidioc_g_ctrl = qcam_g_ctrl, |
| 732 | .vidioc_s_ctrl = qcam_s_ctrl, |
| 733 | .vidioc_enum_fmt_vid_cap = qcam_enum_fmt_vid_cap, |
| 734 | .vidioc_g_fmt_vid_cap = qcam_g_fmt_vid_cap, |
| 735 | .vidioc_s_fmt_vid_cap = qcam_s_fmt_vid_cap, |
| 736 | .vidioc_try_fmt_vid_cap = qcam_try_fmt_vid_cap, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | }; |
| 738 | |
| 739 | /* Initialize the QuickCam driver control structure. */ |
| 740 | |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 741 | static struct qcam *qcam_init(struct parport *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 742 | { |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 743 | struct qcam *qcam; |
| 744 | struct v4l2_device *v4l2_dev; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 745 | |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 746 | qcam = kzalloc(sizeof(*qcam), GFP_KERNEL); |
| 747 | if (qcam == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | return NULL; |
| 749 | |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 750 | v4l2_dev = &qcam->v4l2_dev; |
| 751 | strlcpy(v4l2_dev->name, "c-qcam", sizeof(v4l2_dev->name)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 753 | if (v4l2_device_register(NULL, v4l2_dev) < 0) { |
| 754 | v4l2_err(v4l2_dev, "Could not register v4l2_device\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 755 | return NULL; |
| 756 | } |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 757 | |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 758 | qcam->pport = port; |
| 759 | qcam->pdev = parport_register_device(port, "c-qcam", NULL, NULL, |
| 760 | NULL, 0, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 762 | qcam->bidirectional = (qcam->pport->modes & PARPORT_MODE_TRISTATE) ? 1 : 0; |
| 763 | |
| 764 | if (qcam->pdev == NULL) { |
| 765 | v4l2_err(v4l2_dev, "couldn't register for %s.\n", port->name); |
| 766 | kfree(qcam); |
| 767 | return NULL; |
| 768 | } |
| 769 | |
| 770 | strlcpy(qcam->vdev.name, "Colour QuickCam", sizeof(qcam->vdev.name)); |
| 771 | qcam->vdev.v4l2_dev = v4l2_dev; |
| 772 | qcam->vdev.fops = &qcam_fops; |
| 773 | qcam->vdev.ioctl_ops = &qcam_ioctl_ops; |
| 774 | qcam->vdev.release = video_device_release_empty; |
| 775 | video_set_drvdata(&qcam->vdev, qcam); |
| 776 | |
| 777 | mutex_init(&qcam->lock); |
| 778 | qcam->width = qcam->ccd_width = 320; |
| 779 | qcam->height = qcam->ccd_height = 240; |
| 780 | qcam->mode = QC_MILLIONS | QC_DECIMATION_1; |
| 781 | qcam->contrast = 192; |
| 782 | qcam->brightness = 240; |
| 783 | qcam->whitebal = 128; |
| 784 | qcam->top = 1; |
| 785 | qcam->left = 14; |
| 786 | return qcam; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 787 | } |
| 788 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | static int init_cqcam(struct parport *port) |
| 790 | { |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 791 | struct qcam *qcam; |
| 792 | struct v4l2_device *v4l2_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 793 | |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 794 | if (parport[0] != -1) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | /* The user gave specific instructions */ |
| 796 | int i, found = 0; |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 797 | |
| 798 | for (i = 0; i < MAX_CAMS && parport[i] != -1; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 799 | if (parport[0] == port->number) |
| 800 | found = 1; |
| 801 | } |
| 802 | if (!found) |
| 803 | return -ENODEV; |
| 804 | } |
| 805 | |
| 806 | if (num_cams == MAX_CAMS) |
| 807 | return -ENOSPC; |
| 808 | |
| 809 | qcam = qcam_init(port); |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 810 | if (qcam == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | return -ENODEV; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 812 | |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 813 | v4l2_dev = &qcam->v4l2_dev; |
| 814 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 815 | parport_claim_or_block(qcam->pdev); |
| 816 | |
| 817 | qc_reset(qcam); |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 818 | |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 819 | if (probe && qc_detect(qcam) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 820 | parport_release(qcam->pdev); |
| 821 | parport_unregister_device(qcam->pdev); |
| 822 | kfree(qcam); |
| 823 | return -ENODEV; |
| 824 | } |
| 825 | |
| 826 | qc_setup(qcam); |
| 827 | |
| 828 | parport_release(qcam->pdev); |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 829 | |
Hans Verkuil | dc60de3 | 2008-09-03 17:11:58 -0300 | [diff] [blame] | 830 | if (video_register_device(&qcam->vdev, VFL_TYPE_GRABBER, video_nr) < 0) { |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 831 | v4l2_err(v4l2_dev, "Unable to register Colour QuickCam on %s\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 832 | qcam->pport->name); |
| 833 | parport_unregister_device(qcam->pdev); |
| 834 | kfree(qcam); |
| 835 | return -ENODEV; |
| 836 | } |
| 837 | |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 838 | v4l2_info(v4l2_dev, "%s: Colour QuickCam found on %s\n", |
Laurent Pinchart | 38c7c03 | 2009-11-27 13:57:15 -0300 | [diff] [blame] | 839 | video_device_node_name(&qcam->vdev), qcam->pport->name); |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 840 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 841 | qcams[num_cams++] = qcam; |
| 842 | |
| 843 | return 0; |
| 844 | } |
| 845 | |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 846 | static void close_cqcam(struct qcam *qcam) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 847 | { |
| 848 | video_unregister_device(&qcam->vdev); |
| 849 | parport_unregister_device(qcam->pdev); |
| 850 | kfree(qcam); |
| 851 | } |
| 852 | |
| 853 | static void cq_attach(struct parport *port) |
| 854 | { |
| 855 | init_cqcam(port); |
| 856 | } |
| 857 | |
| 858 | static void cq_detach(struct parport *port) |
| 859 | { |
| 860 | /* Write this some day. */ |
| 861 | } |
| 862 | |
| 863 | static struct parport_driver cqcam_driver = { |
| 864 | .name = "cqcam", |
| 865 | .attach = cq_attach, |
| 866 | .detach = cq_detach, |
| 867 | }; |
| 868 | |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 869 | static int __init cqcam_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 870 | { |
Hans Verkuil | d71964f | 2010-05-10 03:55:25 -0300 | [diff] [blame] | 871 | printk(KERN_INFO BANNER "\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | |
| 873 | return parport_register_driver(&cqcam_driver); |
| 874 | } |
| 875 | |
Hans Verkuil | 51224aa | 2010-03-22 04:33:56 -0300 | [diff] [blame] | 876 | static void __exit cqcam_cleanup(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 877 | { |
| 878 | unsigned int i; |
| 879 | |
| 880 | for (i = 0; i < num_cams; i++) |
| 881 | close_cqcam(qcams[i]); |
| 882 | |
| 883 | parport_unregister_driver(&cqcam_driver); |
| 884 | } |
| 885 | |
| 886 | MODULE_AUTHOR("Philip Blundell <philb@gnu.org>"); |
| 887 | MODULE_DESCRIPTION(BANNER); |
| 888 | MODULE_LICENSE("GPL"); |
| 889 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | module_init(cqcam_init); |
| 891 | module_exit(cqcam_cleanup); |