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62 |
marcus.erl |
/*
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* Video4Linux Colour QuickCam driver
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* Copyright 1997-2000 Philip Blundell <philb@gnu.org>
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*
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* Module parameters:
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*
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* parport=auto -- probe all parports (default)
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* parport=0 -- parport0 becomes qcam1
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* parport=2,0,1 -- parports 2,0,1 are tried in that order
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*
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* probe=0 -- do no probing, assume camera is present
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* probe=1 -- use IEEE-1284 autoprobe data only (default)
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* probe=2 -- probe aggressively for cameras
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*
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* force_rgb=1 -- force data format to RGB (default is BGR)
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*
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* The parport parameter controls which parports will be scanned.
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* Scanning all parports causes some printers to print a garbage page.
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* -- March 14, 1999 Billy Donahue <billy@escape.com>
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*
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* Fixed data format to BGR, added force_rgb parameter. Added missing
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* parport_unregister_driver() on module removal.
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* -- May 28, 2000 Claudio Matsuoka <claudio@conectiva.com>
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*/
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <linux/errno.h>
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#include <linux/fs.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/mm.h>
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#include <linux/parport.h>
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#include <linux/sched.h>
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#include <linux/videodev.h>
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#include <media/v4l2-common.h>
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#include <linux/mutex.h>
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#include <asm/uaccess.h>
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struct qcam_device {
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struct video_device vdev;
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struct pardevice *pdev;
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struct parport *pport;
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int width, height;
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int ccd_width, ccd_height;
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int mode;
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int contrast, brightness, whitebal;
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int top, left;
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unsigned int bidirectional;
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struct mutex lock;
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};
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/* cameras maximum */
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#define MAX_CAMS 4
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/* The three possible QuickCam modes */
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#define QC_MILLIONS 0x18
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#define QC_BILLIONS 0x10
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#define QC_THOUSANDS 0x08 /* with VIDEC compression (not supported) */
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/* The three possible decimations */
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#define QC_DECIMATION_1 0
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#define QC_DECIMATION_2 2
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#define QC_DECIMATION_4 4
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#define BANNER "Colour QuickCam for Video4Linux v0.05"
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static int parport[MAX_CAMS] = { [1 ... MAX_CAMS-1] = -1 };
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static int probe = 2;
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static int force_rgb = 0;
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static int video_nr = -1;
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static inline void qcam_set_ack(struct qcam_device *qcam, unsigned int i)
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{
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/* note: the QC specs refer to the PCAck pin by voltage, not
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software level. PC ports have builtin inverters. */
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parport_frob_control(qcam->pport, 8, i?8:0);
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}
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static inline unsigned int qcam_ready1(struct qcam_device *qcam)
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{
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return (parport_read_status(qcam->pport) & 0x8)?1:0;
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}
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static inline unsigned int qcam_ready2(struct qcam_device *qcam)
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{
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return (parport_read_data(qcam->pport) & 0x1)?1:0;
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}
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static unsigned int qcam_await_ready1(struct qcam_device *qcam,
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int value)
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{
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unsigned long oldjiffies = jiffies;
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unsigned int i;
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| 98 |
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for (oldjiffies = jiffies; (jiffies - oldjiffies) < msecs_to_jiffies(40); )
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if (qcam_ready1(qcam) == value)
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return 0;
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/* If the camera didn't respond within 1/25 second, poll slowly
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for a while. */
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for (i = 0; i < 50; i++)
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{
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if (qcam_ready1(qcam) == value)
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return 0;
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msleep_interruptible(100);
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}
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/* Probably somebody pulled the plug out. Not much we can do. */
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printk(KERN_ERR "c-qcam: ready1 timeout (%d) %x %x\n", value,
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parport_read_status(qcam->pport),
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parport_read_control(qcam->pport));
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return 1;
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}
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static unsigned int qcam_await_ready2(struct qcam_device *qcam, int value)
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{
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unsigned long oldjiffies = jiffies;
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unsigned int i;
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for (oldjiffies = jiffies; (jiffies - oldjiffies) < msecs_to_jiffies(40); )
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if (qcam_ready2(qcam) == value)
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return 0;
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/* If the camera didn't respond within 1/25 second, poll slowly
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for a while. */
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for (i = 0; i < 50; i++)
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{
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if (qcam_ready2(qcam) == value)
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return 0;
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msleep_interruptible(100);
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}
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/* Probably somebody pulled the plug out. Not much we can do. */
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printk(KERN_ERR "c-qcam: ready2 timeout (%d) %x %x %x\n", value,
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parport_read_status(qcam->pport),
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parport_read_control(qcam->pport),
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parport_read_data(qcam->pport));
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return 1;
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}
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static int qcam_read_data(struct qcam_device *qcam)
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{
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unsigned int idata;
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qcam_set_ack(qcam, 0);
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if (qcam_await_ready1(qcam, 1)) return -1;
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idata = parport_read_status(qcam->pport) & 0xf0;
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qcam_set_ack(qcam, 1);
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if (qcam_await_ready1(qcam, 0)) return -1;
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idata |= (parport_read_status(qcam->pport) >> 4);
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return idata;
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}
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static int qcam_write_data(struct qcam_device *qcam, unsigned int data)
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{
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unsigned int idata;
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parport_write_data(qcam->pport, data);
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idata = qcam_read_data(qcam);
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if (data != idata)
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{
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printk(KERN_WARNING "cqcam: sent %x but received %x\n", data,
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idata);
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return 1;
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}
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return 0;
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}
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static inline int qcam_set(struct qcam_device *qcam, unsigned int cmd, unsigned int data)
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{
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if (qcam_write_data(qcam, cmd))
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return -1;
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if (qcam_write_data(qcam, data))
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return -1;
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return 0;
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}
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static inline int qcam_get(struct qcam_device *qcam, unsigned int cmd)
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{
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if (qcam_write_data(qcam, cmd))
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return -1;
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return qcam_read_data(qcam);
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}
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static int qc_detect(struct qcam_device *qcam)
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{
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unsigned int stat, ostat, i, count = 0;
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/* The probe routine below is not very reliable. The IEEE-1284
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probe takes precedence. */
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/* XXX Currently parport provides no way to distinguish between
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"the IEEE probe was not done" and "the probe was done, but
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no device was found". Fix this one day. */
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if (qcam->pport->probe_info[0].class == PARPORT_CLASS_MEDIA
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&& qcam->pport->probe_info[0].model
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&& !strcmp(qcam->pdev->port->probe_info[0].model,
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"Color QuickCam 2.0")) {
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printk(KERN_DEBUG "QuickCam: Found by IEEE1284 probe.\n");
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return 1;
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}
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| 203 |
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if (probe < 2)
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return 0;
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parport_write_control(qcam->pport, 0xc);
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| 208 |
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/* look for a heartbeat */
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ostat = stat = parport_read_status(qcam->pport);
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for (i=0; i<250; i++)
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{
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mdelay(1);
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stat = parport_read_status(qcam->pport);
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if (ostat != stat)
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{
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| 216 |
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if (++count >= 3) return 1;
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ostat = stat;
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}
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| 219 |
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}
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| 221 |
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/* Reset the camera and try again */
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parport_write_control(qcam->pport, 0xc);
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parport_write_control(qcam->pport, 0x8);
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mdelay(1);
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parport_write_control(qcam->pport, 0xc);
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mdelay(1);
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count = 0;
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| 229 |
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ostat = stat = parport_read_status(qcam->pport);
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for (i=0; i<250; i++)
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{
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| 232 |
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mdelay(1);
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stat = parport_read_status(qcam->pport);
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if (ostat != stat)
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{
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| 236 |
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if (++count >= 3) return 1;
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ostat = stat;
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| 238 |
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}
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| 239 |
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}
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| 240 |
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| 241 |
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/* no (or flatline) camera, give up */
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| 242 |
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return 0;
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| 243 |
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}
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| 244 |
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| 245 |
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static void qc_reset(struct qcam_device *qcam)
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| 246 |
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{
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| 247 |
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parport_write_control(qcam->pport, 0xc);
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| 248 |
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parport_write_control(qcam->pport, 0x8);
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mdelay(1);
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parport_write_control(qcam->pport, 0xc);
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mdelay(1);
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| 252 |
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}
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| 253 |
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| 254 |
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/* Reset the QuickCam and program for brightness, contrast,
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* white-balance, and resolution. */
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| 256 |
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| 257 |
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static void qc_setup(struct qcam_device *q)
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{
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| 259 |
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qc_reset(q);
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| 260 |
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| 261 |
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/* Set the brightness. */
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| 262 |
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qcam_set(q, 11, q->brightness);
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| 263 |
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| 264 |
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/* Set the height and width. These refer to the actual
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| 265 |
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CCD area *before* applying the selected decimation. */
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| 266 |
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qcam_set(q, 17, q->ccd_height);
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| 267 |
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qcam_set(q, 19, q->ccd_width / 2);
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| 268 |
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| 269 |
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/* Set top and left. */
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| 270 |
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qcam_set(q, 0xd, q->top);
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| 271 |
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qcam_set(q, 0xf, q->left);
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| 272 |
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| 273 |
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/* Set contrast and white balance. */
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| 274 |
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qcam_set(q, 0x19, q->contrast);
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| 275 |
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qcam_set(q, 0x1f, q->whitebal);
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| 276 |
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| 277 |
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/* Set the speed. */
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| 278 |
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qcam_set(q, 45, 2);
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| 279 |
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}
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| 280 |
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|
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| 281 |
|
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/* Read some bytes from the camera and put them in the buffer.
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| 282 |
|
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nbytes should be a multiple of 3, because bidirectional mode gives
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| 283 |
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us three bytes at a time. */
|
| 284 |
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| 285 |
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static unsigned int qcam_read_bytes(struct qcam_device *q, unsigned char *buf, unsigned int nbytes)
|
| 286 |
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{
|
| 287 |
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unsigned int bytes = 0;
|
| 288 |
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|
| 289 |
|
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qcam_set_ack(q, 0);
|
| 290 |
|
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if (q->bidirectional)
|
| 291 |
|
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{
|
| 292 |
|
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/* It's a bidirectional port */
|
| 293 |
|
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while (bytes < nbytes)
|
| 294 |
|
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{
|
| 295 |
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unsigned int lo1, hi1, lo2, hi2;
|
| 296 |
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unsigned char r, g, b;
|
| 297 |
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|
| 298 |
|
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if (qcam_await_ready2(q, 1)) return bytes;
|
| 299 |
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lo1 = parport_read_data(q->pport) >> 1;
|
| 300 |
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hi1 = ((parport_read_status(q->pport) >> 3) & 0x1f) ^ 0x10;
|
| 301 |
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qcam_set_ack(q, 1);
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| 302 |
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if (qcam_await_ready2(q, 0)) return bytes;
|
| 303 |
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lo2 = parport_read_data(q->pport) >> 1;
|
| 304 |
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hi2 = ((parport_read_status(q->pport) >> 3) & 0x1f) ^ 0x10;
|
| 305 |
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qcam_set_ack(q, 0);
|
| 306 |
|
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r = (lo1 | ((hi1 & 1)<<7));
|
| 307 |
|
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g = ((hi1 & 0x1e)<<3) | ((hi2 & 0x1e)>>1);
|
| 308 |
|
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b = (lo2 | ((hi2 & 1)<<7));
|
| 309 |
|
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if (force_rgb) {
|
| 310 |
|
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buf[bytes++] = r;
|
| 311 |
|
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buf[bytes++] = g;
|
| 312 |
|
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buf[bytes++] = b;
|
| 313 |
|
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} else {
|
| 314 |
|
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buf[bytes++] = b;
|
| 315 |
|
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buf[bytes++] = g;
|
| 316 |
|
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buf[bytes++] = r;
|
| 317 |
|
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}
|
| 318 |
|
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}
|
| 319 |
|
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}
|
| 320 |
|
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else
|
| 321 |
|
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{
|
| 322 |
|
|
/* It's a unidirectional port */
|
| 323 |
|
|
int i = 0, n = bytes;
|
| 324 |
|
|
unsigned char rgb[3];
|
| 325 |
|
|
|
| 326 |
|
|
while (bytes < nbytes)
|
| 327 |
|
|
{
|
| 328 |
|
|
unsigned int hi, lo;
|
| 329 |
|
|
|
| 330 |
|
|
if (qcam_await_ready1(q, 1)) return bytes;
|
| 331 |
|
|
hi = (parport_read_status(q->pport) & 0xf0);
|
| 332 |
|
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qcam_set_ack(q, 1);
|
| 333 |
|
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if (qcam_await_ready1(q, 0)) return bytes;
|
| 334 |
|
|
lo = (parport_read_status(q->pport) & 0xf0);
|
| 335 |
|
|
qcam_set_ack(q, 0);
|
| 336 |
|
|
/* flip some bits */
|
| 337 |
|
|
rgb[(i = bytes++ % 3)] = (hi | (lo >> 4)) ^ 0x88;
|
| 338 |
|
|
if (i >= 2) {
|
| 339 |
|
|
get_fragment:
|
| 340 |
|
|
if (force_rgb) {
|
| 341 |
|
|
buf[n++] = rgb[0];
|
| 342 |
|
|
buf[n++] = rgb[1];
|
| 343 |
|
|
buf[n++] = rgb[2];
|
| 344 |
|
|
} else {
|
| 345 |
|
|
buf[n++] = rgb[2];
|
| 346 |
|
|
buf[n++] = rgb[1];
|
| 347 |
|
|
buf[n++] = rgb[0];
|
| 348 |
|
|
}
|
| 349 |
|
|
}
|
| 350 |
|
|
}
|
| 351 |
|
|
if (i) {
|
| 352 |
|
|
i = 0;
|
| 353 |
|
|
goto get_fragment;
|
| 354 |
|
|
}
|
| 355 |
|
|
}
|
| 356 |
|
|
return bytes;
|
| 357 |
|
|
}
|
| 358 |
|
|
|
| 359 |
|
|
#define BUFSZ 150
|
| 360 |
|
|
|
| 361 |
|
|
static long qc_capture(struct qcam_device *q, char __user *buf, unsigned long len)
|
| 362 |
|
|
{
|
| 363 |
|
|
unsigned lines, pixelsperline, bitsperxfer;
|
| 364 |
|
|
unsigned int is_bi_dir = q->bidirectional;
|
| 365 |
|
|
size_t wantlen, outptr = 0;
|
| 366 |
|
|
char tmpbuf[BUFSZ];
|
| 367 |
|
|
|
| 368 |
|
|
if (!access_ok(VERIFY_WRITE, buf, len))
|
| 369 |
|
|
return -EFAULT;
|
| 370 |
|
|
|
| 371 |
|
|
/* Wait for camera to become ready */
|
| 372 |
|
|
for (;;)
|
| 373 |
|
|
{
|
| 374 |
|
|
int i = qcam_get(q, 41);
|
| 375 |
|
|
if (i == -1) {
|
| 376 |
|
|
qc_setup(q);
|
| 377 |
|
|
return -EIO;
|
| 378 |
|
|
}
|
| 379 |
|
|
if ((i & 0x80) == 0)
|
| 380 |
|
|
break;
|
| 381 |
|
|
else
|
| 382 |
|
|
schedule();
|
| 383 |
|
|
}
|
| 384 |
|
|
|
| 385 |
|
|
if (qcam_set(q, 7, (q->mode | (is_bi_dir?1:0)) + 1))
|
| 386 |
|
|
return -EIO;
|
| 387 |
|
|
|
| 388 |
|
|
lines = q->height;
|
| 389 |
|
|
pixelsperline = q->width;
|
| 390 |
|
|
bitsperxfer = (is_bi_dir) ? 24 : 8;
|
| 391 |
|
|
|
| 392 |
|
|
if (is_bi_dir)
|
| 393 |
|
|
{
|
| 394 |
|
|
/* Turn the port around */
|
| 395 |
|
|
parport_data_reverse(q->pport);
|
| 396 |
|
|
mdelay(3);
|
| 397 |
|
|
qcam_set_ack(q, 0);
|
| 398 |
|
|
if (qcam_await_ready1(q, 1)) {
|
| 399 |
|
|
qc_setup(q);
|
| 400 |
|
|
return -EIO;
|
| 401 |
|
|
}
|
| 402 |
|
|
qcam_set_ack(q, 1);
|
| 403 |
|
|
if (qcam_await_ready1(q, 0)) {
|
| 404 |
|
|
qc_setup(q);
|
| 405 |
|
|
return -EIO;
|
| 406 |
|
|
}
|
| 407 |
|
|
}
|
| 408 |
|
|
|
| 409 |
|
|
wantlen = lines * pixelsperline * 24 / 8;
|
| 410 |
|
|
|
| 411 |
|
|
while (wantlen)
|
| 412 |
|
|
{
|
| 413 |
|
|
size_t t, s;
|
| 414 |
|
|
s = (wantlen > BUFSZ)?BUFSZ:wantlen;
|
| 415 |
|
|
t = qcam_read_bytes(q, tmpbuf, s);
|
| 416 |
|
|
if (outptr < len)
|
| 417 |
|
|
{
|
| 418 |
|
|
size_t sz = len - outptr;
|
| 419 |
|
|
if (sz > t) sz = t;
|
| 420 |
|
|
if (__copy_to_user(buf+outptr, tmpbuf, sz))
|
| 421 |
|
|
break;
|
| 422 |
|
|
outptr += sz;
|
| 423 |
|
|
}
|
| 424 |
|
|
wantlen -= t;
|
| 425 |
|
|
if (t < s)
|
| 426 |
|
|
break;
|
| 427 |
|
|
cond_resched();
|
| 428 |
|
|
}
|
| 429 |
|
|
|
| 430 |
|
|
len = outptr;
|
| 431 |
|
|
|
| 432 |
|
|
if (wantlen)
|
| 433 |
|
|
{
|
| 434 |
|
|
printk("qcam: short read.\n");
|
| 435 |
|
|
if (is_bi_dir)
|
| 436 |
|
|
parport_data_forward(q->pport);
|
| 437 |
|
|
qc_setup(q);
|
| 438 |
|
|
return len;
|
| 439 |
|
|
}
|
| 440 |
|
|
|
| 441 |
|
|
if (is_bi_dir)
|
| 442 |
|
|
{
|
| 443 |
|
|
int l;
|
| 444 |
|
|
do {
|
| 445 |
|
|
l = qcam_read_bytes(q, tmpbuf, 3);
|
| 446 |
|
|
cond_resched();
|
| 447 |
|
|
} while (l && (tmpbuf[0] == 0x7e || tmpbuf[1] == 0x7e || tmpbuf[2] == 0x7e));
|
| 448 |
|
|
if (force_rgb) {
|
| 449 |
|
|
if (tmpbuf[0] != 0xe || tmpbuf[1] != 0x0 || tmpbuf[2] != 0xf)
|
| 450 |
|
|
printk("qcam: bad EOF\n");
|
| 451 |
|
|
} else {
|
| 452 |
|
|
if (tmpbuf[0] != 0xf || tmpbuf[1] != 0x0 || tmpbuf[2] != 0xe)
|
| 453 |
|
|
printk("qcam: bad EOF\n");
|
| 454 |
|
|
}
|
| 455 |
|
|
qcam_set_ack(q, 0);
|
| 456 |
|
|
if (qcam_await_ready1(q, 1))
|
| 457 |
|
|
{
|
| 458 |
|
|
printk("qcam: no ack after EOF\n");
|
| 459 |
|
|
parport_data_forward(q->pport);
|
| 460 |
|
|
qc_setup(q);
|
| 461 |
|
|
return len;
|
| 462 |
|
|
}
|
| 463 |
|
|
parport_data_forward(q->pport);
|
| 464 |
|
|
mdelay(3);
|
| 465 |
|
|
qcam_set_ack(q, 1);
|
| 466 |
|
|
if (qcam_await_ready1(q, 0))
|
| 467 |
|
|
{
|
| 468 |
|
|
printk("qcam: no ack to port turnaround\n");
|
| 469 |
|
|
qc_setup(q);
|
| 470 |
|
|
return len;
|
| 471 |
|
|
}
|
| 472 |
|
|
}
|
| 473 |
|
|
else
|
| 474 |
|
|
{
|
| 475 |
|
|
int l;
|
| 476 |
|
|
do {
|
| 477 |
|
|
l = qcam_read_bytes(q, tmpbuf, 1);
|
| 478 |
|
|
cond_resched();
|
| 479 |
|
|
} while (l && tmpbuf[0] == 0x7e);
|
| 480 |
|
|
l = qcam_read_bytes(q, tmpbuf+1, 2);
|
| 481 |
|
|
if (force_rgb) {
|
| 482 |
|
|
if (tmpbuf[0] != 0xe || tmpbuf[1] != 0x0 || tmpbuf[2] != 0xf)
|
| 483 |
|
|
printk("qcam: bad EOF\n");
|
| 484 |
|
|
} else {
|
| 485 |
|
|
if (tmpbuf[0] != 0xf || tmpbuf[1] != 0x0 || tmpbuf[2] != 0xe)
|
| 486 |
|
|
printk("qcam: bad EOF\n");
|
| 487 |
|
|
}
|
| 488 |
|
|
}
|
| 489 |
|
|
|
| 490 |
|
|
qcam_write_data(q, 0);
|
| 491 |
|
|
return len;
|
| 492 |
|
|
}
|
| 493 |
|
|
|
| 494 |
|
|
/*
|
| 495 |
|
|
* Video4linux interfacing
|
| 496 |
|
|
*/
|
| 497 |
|
|
|
| 498 |
|
|
static int qcam_do_ioctl(struct inode *inode, struct file *file,
|
| 499 |
|
|
unsigned int cmd, void *arg)
|
| 500 |
|
|
{
|
| 501 |
|
|
struct video_device *dev = video_devdata(file);
|
| 502 |
|
|
struct qcam_device *qcam=(struct qcam_device *)dev;
|
| 503 |
|
|
|
| 504 |
|
|
switch(cmd)
|
| 505 |
|
|
{
|
| 506 |
|
|
case VIDIOCGCAP:
|
| 507 |
|
|
{
|
| 508 |
|
|
struct video_capability *b = arg;
|
| 509 |
|
|
strcpy(b->name, "Quickcam");
|
| 510 |
|
|
b->type = VID_TYPE_CAPTURE|VID_TYPE_SCALES;
|
| 511 |
|
|
b->channels = 1;
|
| 512 |
|
|
b->audios = 0;
|
| 513 |
|
|
b->maxwidth = 320;
|
| 514 |
|
|
b->maxheight = 240;
|
| 515 |
|
|
b->minwidth = 80;
|
| 516 |
|
|
b->minheight = 60;
|
| 517 |
|
|
return 0;
|
| 518 |
|
|
}
|
| 519 |
|
|
case VIDIOCGCHAN:
|
| 520 |
|
|
{
|
| 521 |
|
|
struct video_channel *v = arg;
|
| 522 |
|
|
if(v->channel!=0)
|
| 523 |
|
|
return -EINVAL;
|
| 524 |
|
|
v->flags=0;
|
| 525 |
|
|
v->tuners=0;
|
| 526 |
|
|
/* Good question.. its composite or SVHS so.. */
|
| 527 |
|
|
v->type = VIDEO_TYPE_CAMERA;
|
| 528 |
|
|
strcpy(v->name, "Camera");
|
| 529 |
|
|
return 0;
|
| 530 |
|
|
}
|
| 531 |
|
|
case VIDIOCSCHAN:
|
| 532 |
|
|
{
|
| 533 |
|
|
struct video_channel *v = arg;
|
| 534 |
|
|
if(v->channel!=0)
|
| 535 |
|
|
return -EINVAL;
|
| 536 |
|
|
return 0;
|
| 537 |
|
|
}
|
| 538 |
|
|
case VIDIOCGTUNER:
|
| 539 |
|
|
{
|
| 540 |
|
|
struct video_tuner *v = arg;
|
| 541 |
|
|
if(v->tuner)
|
| 542 |
|
|
return -EINVAL;
|
| 543 |
|
|
memset(v,0,sizeof(*v));
|
| 544 |
|
|
strcpy(v->name, "Format");
|
| 545 |
|
|
v->mode = VIDEO_MODE_AUTO;
|
| 546 |
|
|
return 0;
|
| 547 |
|
|
}
|
| 548 |
|
|
case VIDIOCSTUNER:
|
| 549 |
|
|
{
|
| 550 |
|
|
struct video_tuner *v = arg;
|
| 551 |
|
|
if(v->tuner)
|
| 552 |
|
|
return -EINVAL;
|
| 553 |
|
|
if(v->mode!=VIDEO_MODE_AUTO)
|
| 554 |
|
|
return -EINVAL;
|
| 555 |
|
|
return 0;
|
| 556 |
|
|
}
|
| 557 |
|
|
case VIDIOCGPICT:
|
| 558 |
|
|
{
|
| 559 |
|
|
struct video_picture *p = arg;
|
| 560 |
|
|
p->colour=0x8000;
|
| 561 |
|
|
p->hue=0x8000;
|
| 562 |
|
|
p->brightness=qcam->brightness<<8;
|
| 563 |
|
|
p->contrast=qcam->contrast<<8;
|
| 564 |
|
|
p->whiteness=qcam->whitebal<<8;
|
| 565 |
|
|
p->depth=24;
|
| 566 |
|
|
p->palette=VIDEO_PALETTE_RGB24;
|
| 567 |
|
|
return 0;
|
| 568 |
|
|
}
|
| 569 |
|
|
case VIDIOCSPICT:
|
| 570 |
|
|
{
|
| 571 |
|
|
struct video_picture *p = arg;
|
| 572 |
|
|
|
| 573 |
|
|
/*
|
| 574 |
|
|
* Sanity check args
|
| 575 |
|
|
*/
|
| 576 |
|
|
if (p->depth != 24 || p->palette != VIDEO_PALETTE_RGB24)
|
| 577 |
|
|
return -EINVAL;
|
| 578 |
|
|
|
| 579 |
|
|
/*
|
| 580 |
|
|
* Now load the camera.
|
| 581 |
|
|
*/
|
| 582 |
|
|
qcam->brightness = p->brightness>>8;
|
| 583 |
|
|
qcam->contrast = p->contrast>>8;
|
| 584 |
|
|
qcam->whitebal = p->whiteness>>8;
|
| 585 |
|
|
|
| 586 |
|
|
mutex_lock(&qcam->lock);
|
| 587 |
|
|
parport_claim_or_block(qcam->pdev);
|
| 588 |
|
|
qc_setup(qcam);
|
| 589 |
|
|
parport_release(qcam->pdev);
|
| 590 |
|
|
mutex_unlock(&qcam->lock);
|
| 591 |
|
|
return 0;
|
| 592 |
|
|
}
|
| 593 |
|
|
case VIDIOCSWIN:
|
| 594 |
|
|
{
|
| 595 |
|
|
struct video_window *vw = arg;
|
| 596 |
|
|
|
| 597 |
|
|
if(vw->flags)
|
| 598 |
|
|
return -EINVAL;
|
| 599 |
|
|
if(vw->clipcount)
|
| 600 |
|
|
return -EINVAL;
|
| 601 |
|
|
if(vw->height<60||vw->height>240)
|
| 602 |
|
|
return -EINVAL;
|
| 603 |
|
|
if(vw->width<80||vw->width>320)
|
| 604 |
|
|
return -EINVAL;
|
| 605 |
|
|
|
| 606 |
|
|
qcam->width = 80;
|
| 607 |
|
|
qcam->height = 60;
|
| 608 |
|
|
qcam->mode = QC_DECIMATION_4;
|
| 609 |
|
|
|
| 610 |
|
|
if(vw->width>=160 && vw->height>=120)
|
| 611 |
|
|
{
|
| 612 |
|
|
qcam->width = 160;
|
| 613 |
|
|
qcam->height = 120;
|
| 614 |
|
|
qcam->mode = QC_DECIMATION_2;
|
| 615 |
|
|
}
|
| 616 |
|
|
if(vw->width>=320 && vw->height>=240)
|
| 617 |
|
|
{
|
| 618 |
|
|
qcam->width = 320;
|
| 619 |
|
|
qcam->height = 240;
|
| 620 |
|
|
qcam->mode = QC_DECIMATION_1;
|
| 621 |
|
|
}
|
| 622 |
|
|
qcam->mode |= QC_MILLIONS;
|
| 623 |
|
|
#if 0
|
| 624 |
|
|
if(vw->width>=640 && vw->height>=480)
|
| 625 |
|
|
{
|
| 626 |
|
|
qcam->width = 640;
|
| 627 |
|
|
qcam->height = 480;
|
| 628 |
|
|
qcam->mode = QC_BILLIONS | QC_DECIMATION_1;
|
| 629 |
|
|
}
|
| 630 |
|
|
#endif
|
| 631 |
|
|
/* Ok we figured out what to use from our
|
| 632 |
|
|
wide choice */
|
| 633 |
|
|
mutex_lock(&qcam->lock);
|
| 634 |
|
|
parport_claim_or_block(qcam->pdev);
|
| 635 |
|
|
qc_setup(qcam);
|
| 636 |
|
|
parport_release(qcam->pdev);
|
| 637 |
|
|
mutex_unlock(&qcam->lock);
|
| 638 |
|
|
return 0;
|
| 639 |
|
|
}
|
| 640 |
|
|
case VIDIOCGWIN:
|
| 641 |
|
|
{
|
| 642 |
|
|
struct video_window *vw = arg;
|
| 643 |
|
|
memset(vw, 0, sizeof(*vw));
|
| 644 |
|
|
vw->width=qcam->width;
|
| 645 |
|
|
vw->height=qcam->height;
|
| 646 |
|
|
return 0;
|
| 647 |
|
|
}
|
| 648 |
|
|
case VIDIOCKEY:
|
| 649 |
|
|
return 0;
|
| 650 |
|
|
case VIDIOCCAPTURE:
|
| 651 |
|
|
case VIDIOCGFBUF:
|
| 652 |
|
|
case VIDIOCSFBUF:
|
| 653 |
|
|
case VIDIOCGFREQ:
|
| 654 |
|
|
case VIDIOCSFREQ:
|
| 655 |
|
|
case VIDIOCGAUDIO:
|
| 656 |
|
|
case VIDIOCSAUDIO:
|
| 657 |
|
|
return -EINVAL;
|
| 658 |
|
|
default:
|
| 659 |
|
|
return -ENOIOCTLCMD;
|
| 660 |
|
|
}
|
| 661 |
|
|
return 0;
|
| 662 |
|
|
}
|
| 663 |
|
|
|
| 664 |
|
|
static int qcam_ioctl(struct inode *inode, struct file *file,
|
| 665 |
|
|
unsigned int cmd, unsigned long arg)
|
| 666 |
|
|
{
|
| 667 |
|
|
return video_usercopy(inode, file, cmd, arg, qcam_do_ioctl);
|
| 668 |
|
|
}
|
| 669 |
|
|
|
| 670 |
|
|
static ssize_t qcam_read(struct file *file, char __user *buf,
|
| 671 |
|
|
size_t count, loff_t *ppos)
|
| 672 |
|
|
{
|
| 673 |
|
|
struct video_device *v = video_devdata(file);
|
| 674 |
|
|
struct qcam_device *qcam=(struct qcam_device *)v;
|
| 675 |
|
|
int len;
|
| 676 |
|
|
|
| 677 |
|
|
mutex_lock(&qcam->lock);
|
| 678 |
|
|
parport_claim_or_block(qcam->pdev);
|
| 679 |
|
|
/* Probably should have a semaphore against multiple users */
|
| 680 |
|
|
len = qc_capture(qcam, buf,count);
|
| 681 |
|
|
parport_release(qcam->pdev);
|
| 682 |
|
|
mutex_unlock(&qcam->lock);
|
| 683 |
|
|
return len;
|
| 684 |
|
|
}
|
| 685 |
|
|
|
| 686 |
|
|
/* video device template */
|
| 687 |
|
|
static const struct file_operations qcam_fops = {
|
| 688 |
|
|
.owner = THIS_MODULE,
|
| 689 |
|
|
.open = video_exclusive_open,
|
| 690 |
|
|
.release = video_exclusive_release,
|
| 691 |
|
|
.ioctl = qcam_ioctl,
|
| 692 |
|
|
.compat_ioctl = v4l_compat_ioctl32,
|
| 693 |
|
|
.read = qcam_read,
|
| 694 |
|
|
.llseek = no_llseek,
|
| 695 |
|
|
};
|
| 696 |
|
|
|
| 697 |
|
|
static struct video_device qcam_template=
|
| 698 |
|
|
{
|
| 699 |
|
|
.owner = THIS_MODULE,
|
| 700 |
|
|
.name = "Colour QuickCam",
|
| 701 |
|
|
.type = VID_TYPE_CAPTURE,
|
| 702 |
|
|
.fops = &qcam_fops,
|
| 703 |
|
|
};
|
| 704 |
|
|
|
| 705 |
|
|
/* Initialize the QuickCam driver control structure. */
|
| 706 |
|
|
|
| 707 |
|
|
static struct qcam_device *qcam_init(struct parport *port)
|
| 708 |
|
|
{
|
| 709 |
|
|
struct qcam_device *q;
|
| 710 |
|
|
|
| 711 |
|
|
q = kmalloc(sizeof(struct qcam_device), GFP_KERNEL);
|
| 712 |
|
|
if(q==NULL)
|
| 713 |
|
|
return NULL;
|
| 714 |
|
|
|
| 715 |
|
|
q->pport = port;
|
| 716 |
|
|
q->pdev = parport_register_device(port, "c-qcam", NULL, NULL,
|
| 717 |
|
|
NULL, 0, NULL);
|
| 718 |
|
|
|
| 719 |
|
|
q->bidirectional = (q->pport->modes & PARPORT_MODE_TRISTATE)?1:0;
|
| 720 |
|
|
|
| 721 |
|
|
if (q->pdev == NULL)
|
| 722 |
|
|
{
|
| 723 |
|
|
printk(KERN_ERR "c-qcam: couldn't register for %s.\n",
|
| 724 |
|
|
port->name);
|
| 725 |
|
|
kfree(q);
|
| 726 |
|
|
return NULL;
|
| 727 |
|
|
}
|
| 728 |
|
|
|
| 729 |
|
|
memcpy(&q->vdev, &qcam_template, sizeof(qcam_template));
|
| 730 |
|
|
|
| 731 |
|
|
mutex_init(&q->lock);
|
| 732 |
|
|
q->width = q->ccd_width = 320;
|
| 733 |
|
|
q->height = q->ccd_height = 240;
|
| 734 |
|
|
q->mode = QC_MILLIONS | QC_DECIMATION_1;
|
| 735 |
|
|
q->contrast = 192;
|
| 736 |
|
|
q->brightness = 240;
|
| 737 |
|
|
q->whitebal = 128;
|
| 738 |
|
|
q->top = 1;
|
| 739 |
|
|
q->left = 14;
|
| 740 |
|
|
return q;
|
| 741 |
|
|
}
|
| 742 |
|
|
|
| 743 |
|
|
static struct qcam_device *qcams[MAX_CAMS];
|
| 744 |
|
|
static unsigned int num_cams = 0;
|
| 745 |
|
|
|
| 746 |
|
|
static int init_cqcam(struct parport *port)
|
| 747 |
|
|
{
|
| 748 |
|
|
struct qcam_device *qcam;
|
| 749 |
|
|
|
| 750 |
|
|
if (parport[0] != -1)
|
| 751 |
|
|
{
|
| 752 |
|
|
/* The user gave specific instructions */
|
| 753 |
|
|
int i, found = 0;
|
| 754 |
|
|
for (i = 0; i < MAX_CAMS && parport[i] != -1; i++)
|
| 755 |
|
|
{
|
| 756 |
|
|
if (parport[0] == port->number)
|
| 757 |
|
|
found = 1;
|
| 758 |
|
|
}
|
| 759 |
|
|
if (!found)
|
| 760 |
|
|
return -ENODEV;
|
| 761 |
|
|
}
|
| 762 |
|
|
|
| 763 |
|
|
if (num_cams == MAX_CAMS)
|
| 764 |
|
|
return -ENOSPC;
|
| 765 |
|
|
|
| 766 |
|
|
qcam = qcam_init(port);
|
| 767 |
|
|
if (qcam==NULL)
|
| 768 |
|
|
return -ENODEV;
|
| 769 |
|
|
|
| 770 |
|
|
parport_claim_or_block(qcam->pdev);
|
| 771 |
|
|
|
| 772 |
|
|
qc_reset(qcam);
|
| 773 |
|
|
|
| 774 |
|
|
if (probe && qc_detect(qcam)==0)
|
| 775 |
|
|
{
|
| 776 |
|
|
parport_release(qcam->pdev);
|
| 777 |
|
|
parport_unregister_device(qcam->pdev);
|
| 778 |
|
|
kfree(qcam);
|
| 779 |
|
|
return -ENODEV;
|
| 780 |
|
|
}
|
| 781 |
|
|
|
| 782 |
|
|
qc_setup(qcam);
|
| 783 |
|
|
|
| 784 |
|
|
parport_release(qcam->pdev);
|
| 785 |
|
|
|
| 786 |
|
|
if (video_register_device(&qcam->vdev, VFL_TYPE_GRABBER, video_nr)==-1)
|
| 787 |
|
|
{
|
| 788 |
|
|
printk(KERN_ERR "Unable to register Colour QuickCam on %s\n",
|
| 789 |
|
|
qcam->pport->name);
|
| 790 |
|
|
parport_unregister_device(qcam->pdev);
|
| 791 |
|
|
kfree(qcam);
|
| 792 |
|
|
return -ENODEV;
|
| 793 |
|
|
}
|
| 794 |
|
|
|
| 795 |
|
|
printk(KERN_INFO "video%d: Colour QuickCam found on %s\n",
|
| 796 |
|
|
qcam->vdev.minor, qcam->pport->name);
|
| 797 |
|
|
|
| 798 |
|
|
qcams[num_cams++] = qcam;
|
| 799 |
|
|
|
| 800 |
|
|
return 0;
|
| 801 |
|
|
}
|
| 802 |
|
|
|
| 803 |
|
|
static void close_cqcam(struct qcam_device *qcam)
|
| 804 |
|
|
{
|
| 805 |
|
|
video_unregister_device(&qcam->vdev);
|
| 806 |
|
|
parport_unregister_device(qcam->pdev);
|
| 807 |
|
|
kfree(qcam);
|
| 808 |
|
|
}
|
| 809 |
|
|
|
| 810 |
|
|
static void cq_attach(struct parport *port)
|
| 811 |
|
|
{
|
| 812 |
|
|
init_cqcam(port);
|
| 813 |
|
|
}
|
| 814 |
|
|
|
| 815 |
|
|
static void cq_detach(struct parport *port)
|
| 816 |
|
|
{
|
| 817 |
|
|
/* Write this some day. */
|
| 818 |
|
|
}
|
| 819 |
|
|
|
| 820 |
|
|
static struct parport_driver cqcam_driver = {
|
| 821 |
|
|
.name = "cqcam",
|
| 822 |
|
|
.attach = cq_attach,
|
| 823 |
|
|
.detach = cq_detach,
|
| 824 |
|
|
};
|
| 825 |
|
|
|
| 826 |
|
|
static int __init cqcam_init (void)
|
| 827 |
|
|
{
|
| 828 |
|
|
printk(BANNER "\n");
|
| 829 |
|
|
|
| 830 |
|
|
return parport_register_driver(&cqcam_driver);
|
| 831 |
|
|
}
|
| 832 |
|
|
|
| 833 |
|
|
static void __exit cqcam_cleanup (void)
|
| 834 |
|
|
{
|
| 835 |
|
|
unsigned int i;
|
| 836 |
|
|
|
| 837 |
|
|
for (i = 0; i < num_cams; i++)
|
| 838 |
|
|
close_cqcam(qcams[i]);
|
| 839 |
|
|
|
| 840 |
|
|
parport_unregister_driver(&cqcam_driver);
|
| 841 |
|
|
}
|
| 842 |
|
|
|
| 843 |
|
|
MODULE_AUTHOR("Philip Blundell <philb@gnu.org>");
|
| 844 |
|
|
MODULE_DESCRIPTION(BANNER);
|
| 845 |
|
|
MODULE_LICENSE("GPL");
|
| 846 |
|
|
|
| 847 |
|
|
/* FIXME: parport=auto would never have worked, surely? --RR */
|
| 848 |
|
|
MODULE_PARM_DESC(parport ,"parport=<auto|n[,n]...> for port detection method\n\
|
| 849 |
|
|
probe=<0|1|2> for camera detection method\n\
|
| 850 |
|
|
force_rgb=<0|1> for RGB data format (default BGR)");
|
| 851 |
|
|
module_param_array(parport, int, NULL, 0);
|
| 852 |
|
|
module_param(probe, int, 0);
|
| 853 |
|
|
module_param(force_rgb, bool, 0);
|
| 854 |
|
|
module_param(video_nr, int, 0);
|
| 855 |
|
|
|
| 856 |
|
|
module_init(cqcam_init);
|
| 857 |
|
|
module_exit(cqcam_cleanup);
|
