mirror of https://gitee.com/openkylin/linux.git
892 lines
21 KiB
C
892 lines
21 KiB
C
/*
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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/mutex.h>
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#include <linux/jiffies.h>
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#include <linux/videodev2.h>
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#include <asm/uaccess.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-common.h>
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#include <media/v4l2-ioctl.h>
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struct qcam {
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struct v4l2_device v4l2_dev;
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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 v0.06"
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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;
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static int video_nr = -1;
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/* FIXME: parport=auto would never have worked, surely? --RR */
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MODULE_PARM_DESC(parport, "parport=<auto|n[,n]...> for port detection method\n"
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"probe=<0|1|2> for camera detection method\n"
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"force_rgb=<0|1> for RGB data format (default BGR)");
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module_param_array(parport, int, NULL, 0);
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module_param(probe, int, 0);
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module_param(force_rgb, bool, 0);
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module_param(video_nr, int, 0);
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static struct qcam *qcams[MAX_CAMS];
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static unsigned int num_cams;
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static inline void qcam_set_ack(struct qcam *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 *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 *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 *qcam, int value)
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{
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struct v4l2_device *v4l2_dev = &qcam->v4l2_dev;
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unsigned long oldjiffies = jiffies;
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unsigned int i;
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for (oldjiffies = jiffies;
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time_before(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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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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v4l2_err(v4l2_dev, "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 *qcam, int value)
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{
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struct v4l2_device *v4l2_dev = &qcam->v4l2_dev;
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unsigned long oldjiffies = jiffies;
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unsigned int i;
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for (oldjiffies = jiffies;
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time_before(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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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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v4l2_err(v4l2_dev, "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 *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))
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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))
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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 *qcam, unsigned int data)
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{
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struct v4l2_device *v4l2_dev = &qcam->v4l2_dev;
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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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v4l2_warn(v4l2_dev, "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 *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 *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 *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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if (probe < 2)
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return 0;
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parport_write_control(qcam->pport, 0xc);
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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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mdelay(1);
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stat = parport_read_status(qcam->pport);
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if (ostat != stat) {
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if (++count >= 3)
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return 1;
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ostat = stat;
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}
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}
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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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ostat = stat = parport_read_status(qcam->pport);
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for (i = 0; i < 250; i++) {
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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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if (++count >= 3)
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return 1;
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ostat = stat;
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}
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}
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/* no (or flatline) camera, give up */
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return 0;
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}
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static void qc_reset(struct qcam *qcam)
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{
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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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}
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/* Reset the QuickCam and program for brightness, contrast,
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* white-balance, and resolution. */
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static void qc_setup(struct qcam *qcam)
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{
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qc_reset(qcam);
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/* Set the brightness. */
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qcam_set(qcam, 11, qcam->brightness);
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/* Set the height and width. These refer to the actual
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CCD area *before* applying the selected decimation. */
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qcam_set(qcam, 17, qcam->ccd_height);
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qcam_set(qcam, 19, qcam->ccd_width / 2);
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/* Set top and left. */
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qcam_set(qcam, 0xd, qcam->top);
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qcam_set(qcam, 0xf, qcam->left);
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/* Set contrast and white balance. */
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qcam_set(qcam, 0x19, qcam->contrast);
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qcam_set(qcam, 0x1f, qcam->whitebal);
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/* Set the speed. */
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qcam_set(qcam, 45, 2);
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}
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/* Read some bytes from the camera and put them in the buffer.
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nbytes should be a multiple of 3, because bidirectional mode gives
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us three bytes at a time. */
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static unsigned int qcam_read_bytes(struct qcam *qcam, unsigned char *buf, unsigned int nbytes)
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{
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unsigned int bytes = 0;
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qcam_set_ack(qcam, 0);
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if (qcam->bidirectional) {
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/* It's a bidirectional port */
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while (bytes < nbytes) {
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unsigned int lo1, hi1, lo2, hi2;
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unsigned char r, g, b;
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if (qcam_await_ready2(qcam, 1))
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return bytes;
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lo1 = parport_read_data(qcam->pport) >> 1;
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hi1 = ((parport_read_status(qcam->pport) >> 3) & 0x1f) ^ 0x10;
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qcam_set_ack(qcam, 1);
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if (qcam_await_ready2(qcam, 0))
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return bytes;
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lo2 = parport_read_data(qcam->pport) >> 1;
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hi2 = ((parport_read_status(qcam->pport) >> 3) & 0x1f) ^ 0x10;
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qcam_set_ack(qcam, 0);
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r = lo1 | ((hi1 & 1) << 7);
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g = ((hi1 & 0x1e) << 3) | ((hi2 & 0x1e) >> 1);
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b = lo2 | ((hi2 & 1) << 7);
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if (force_rgb) {
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buf[bytes++] = r;
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buf[bytes++] = g;
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buf[bytes++] = b;
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} else {
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buf[bytes++] = b;
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buf[bytes++] = g;
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buf[bytes++] = r;
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}
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}
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} else {
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/* It's a unidirectional port */
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int i = 0, n = bytes;
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unsigned char rgb[3];
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while (bytes < nbytes) {
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unsigned int hi, lo;
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if (qcam_await_ready1(qcam, 1))
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return bytes;
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hi = (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))
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return bytes;
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lo = (parport_read_status(qcam->pport) & 0xf0);
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qcam_set_ack(qcam, 0);
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/* flip some bits */
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rgb[(i = bytes++ % 3)] = (hi | (lo >> 4)) ^ 0x88;
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if (i >= 2) {
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get_fragment:
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if (force_rgb) {
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buf[n++] = rgb[0];
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buf[n++] = rgb[1];
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buf[n++] = rgb[2];
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} else {
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buf[n++] = rgb[2];
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buf[n++] = rgb[1];
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buf[n++] = rgb[0];
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}
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}
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}
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if (i) {
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i = 0;
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goto get_fragment;
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}
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}
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return bytes;
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}
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#define BUFSZ 150
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static long qc_capture(struct qcam *qcam, char __user *buf, unsigned long len)
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{
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struct v4l2_device *v4l2_dev = &qcam->v4l2_dev;
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unsigned lines, pixelsperline, bitsperxfer;
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unsigned int is_bi_dir = qcam->bidirectional;
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size_t wantlen, outptr = 0;
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char tmpbuf[BUFSZ];
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if (!access_ok(VERIFY_WRITE, buf, len))
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return -EFAULT;
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/* Wait for camera to become ready */
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for (;;) {
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int i = qcam_get(qcam, 41);
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if (i == -1) {
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qc_setup(qcam);
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return -EIO;
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}
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if ((i & 0x80) == 0)
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break;
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schedule();
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}
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if (qcam_set(qcam, 7, (qcam->mode | (is_bi_dir ? 1 : 0)) + 1))
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return -EIO;
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lines = qcam->height;
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pixelsperline = qcam->width;
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bitsperxfer = (is_bi_dir) ? 24 : 8;
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if (is_bi_dir) {
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/* Turn the port around */
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parport_data_reverse(qcam->pport);
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mdelay(3);
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qcam_set_ack(qcam, 0);
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if (qcam_await_ready1(qcam, 1)) {
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qc_setup(qcam);
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return -EIO;
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}
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qcam_set_ack(qcam, 1);
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if (qcam_await_ready1(qcam, 0)) {
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qc_setup(qcam);
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return -EIO;
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}
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}
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wantlen = lines * pixelsperline * 24 / 8;
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while (wantlen) {
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size_t t, s;
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s = (wantlen > BUFSZ) ? BUFSZ : wantlen;
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t = qcam_read_bytes(qcam, tmpbuf, s);
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if (outptr < len) {
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size_t sz = len - outptr;
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if (sz > t)
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sz = t;
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if (__copy_to_user(buf + outptr, tmpbuf, sz))
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break;
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outptr += sz;
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}
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wantlen -= t;
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if (t < s)
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break;
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cond_resched();
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}
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len = outptr;
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if (wantlen) {
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v4l2_err(v4l2_dev, "short read.\n");
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if (is_bi_dir)
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parport_data_forward(qcam->pport);
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qc_setup(qcam);
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return len;
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}
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if (is_bi_dir) {
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int l;
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do {
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l = qcam_read_bytes(qcam, tmpbuf, 3);
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cond_resched();
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} while (l && (tmpbuf[0] == 0x7e || tmpbuf[1] == 0x7e || tmpbuf[2] == 0x7e));
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if (force_rgb) {
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if (tmpbuf[0] != 0xe || tmpbuf[1] != 0x0 || tmpbuf[2] != 0xf)
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v4l2_err(v4l2_dev, "bad EOF\n");
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} else {
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if (tmpbuf[0] != 0xf || tmpbuf[1] != 0x0 || tmpbuf[2] != 0xe)
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v4l2_err(v4l2_dev, "bad EOF\n");
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}
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qcam_set_ack(qcam, 0);
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if (qcam_await_ready1(qcam, 1)) {
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v4l2_err(v4l2_dev, "no ack after EOF\n");
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parport_data_forward(qcam->pport);
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qc_setup(qcam);
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return len;
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}
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parport_data_forward(qcam->pport);
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mdelay(3);
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qcam_set_ack(qcam, 1);
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if (qcam_await_ready1(qcam, 0)) {
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v4l2_err(v4l2_dev, "no ack to port turnaround\n");
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qc_setup(qcam);
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return len;
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}
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} else {
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int l;
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do {
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l = qcam_read_bytes(qcam, tmpbuf, 1);
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cond_resched();
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} while (l && tmpbuf[0] == 0x7e);
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l = qcam_read_bytes(qcam, tmpbuf + 1, 2);
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if (force_rgb) {
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if (tmpbuf[0] != 0xe || tmpbuf[1] != 0x0 || tmpbuf[2] != 0xf)
|
|
v4l2_err(v4l2_dev, "bad EOF\n");
|
|
} else {
|
|
if (tmpbuf[0] != 0xf || tmpbuf[1] != 0x0 || tmpbuf[2] != 0xe)
|
|
v4l2_err(v4l2_dev, "bad EOF\n");
|
|
}
|
|
}
|
|
|
|
qcam_write_data(qcam, 0);
|
|
return len;
|
|
}
|
|
|
|
/*
|
|
* Video4linux interfacing
|
|
*/
|
|
|
|
static int qcam_querycap(struct file *file, void *priv,
|
|
struct v4l2_capability *vcap)
|
|
{
|
|
struct qcam *qcam = video_drvdata(file);
|
|
|
|
strlcpy(vcap->driver, qcam->v4l2_dev.name, sizeof(vcap->driver));
|
|
strlcpy(vcap->card, "Color Quickcam", sizeof(vcap->card));
|
|
strlcpy(vcap->bus_info, "parport", sizeof(vcap->bus_info));
|
|
vcap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE;
|
|
return 0;
|
|
}
|
|
|
|
static int qcam_enum_input(struct file *file, void *fh, struct v4l2_input *vin)
|
|
{
|
|
if (vin->index > 0)
|
|
return -EINVAL;
|
|
strlcpy(vin->name, "Camera", sizeof(vin->name));
|
|
vin->type = V4L2_INPUT_TYPE_CAMERA;
|
|
vin->audioset = 0;
|
|
vin->tuner = 0;
|
|
vin->std = 0;
|
|
vin->status = 0;
|
|
return 0;
|
|
}
|
|
|
|
static int qcam_g_input(struct file *file, void *fh, unsigned int *inp)
|
|
{
|
|
*inp = 0;
|
|
return 0;
|
|
}
|
|
|
|
static int qcam_s_input(struct file *file, void *fh, unsigned int inp)
|
|
{
|
|
return (inp > 0) ? -EINVAL : 0;
|
|
}
|
|
|
|
static int qcam_queryctrl(struct file *file, void *priv,
|
|
struct v4l2_queryctrl *qc)
|
|
{
|
|
switch (qc->id) {
|
|
case V4L2_CID_BRIGHTNESS:
|
|
return v4l2_ctrl_query_fill(qc, 0, 255, 1, 240);
|
|
case V4L2_CID_CONTRAST:
|
|
return v4l2_ctrl_query_fill(qc, 0, 255, 1, 192);
|
|
case V4L2_CID_GAMMA:
|
|
return v4l2_ctrl_query_fill(qc, 0, 255, 1, 128);
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int qcam_g_ctrl(struct file *file, void *priv,
|
|
struct v4l2_control *ctrl)
|
|
{
|
|
struct qcam *qcam = video_drvdata(file);
|
|
int ret = 0;
|
|
|
|
switch (ctrl->id) {
|
|
case V4L2_CID_BRIGHTNESS:
|
|
ctrl->value = qcam->brightness;
|
|
break;
|
|
case V4L2_CID_CONTRAST:
|
|
ctrl->value = qcam->contrast;
|
|
break;
|
|
case V4L2_CID_GAMMA:
|
|
ctrl->value = qcam->whitebal;
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int qcam_s_ctrl(struct file *file, void *priv,
|
|
struct v4l2_control *ctrl)
|
|
{
|
|
struct qcam *qcam = video_drvdata(file);
|
|
int ret = 0;
|
|
|
|
mutex_lock(&qcam->lock);
|
|
switch (ctrl->id) {
|
|
case V4L2_CID_BRIGHTNESS:
|
|
qcam->brightness = ctrl->value;
|
|
break;
|
|
case V4L2_CID_CONTRAST:
|
|
qcam->contrast = ctrl->value;
|
|
break;
|
|
case V4L2_CID_GAMMA:
|
|
qcam->whitebal = ctrl->value;
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
if (ret == 0) {
|
|
parport_claim_or_block(qcam->pdev);
|
|
qc_setup(qcam);
|
|
parport_release(qcam->pdev);
|
|
}
|
|
mutex_unlock(&qcam->lock);
|
|
return ret;
|
|
}
|
|
|
|
static int qcam_g_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt)
|
|
{
|
|
struct qcam *qcam = video_drvdata(file);
|
|
struct v4l2_pix_format *pix = &fmt->fmt.pix;
|
|
|
|
pix->width = qcam->width;
|
|
pix->height = qcam->height;
|
|
pix->pixelformat = V4L2_PIX_FMT_RGB24;
|
|
pix->field = V4L2_FIELD_NONE;
|
|
pix->bytesperline = 3 * qcam->width;
|
|
pix->sizeimage = 3 * qcam->width * qcam->height;
|
|
/* Just a guess */
|
|
pix->colorspace = V4L2_COLORSPACE_SRGB;
|
|
return 0;
|
|
}
|
|
|
|
static int qcam_try_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt)
|
|
{
|
|
struct v4l2_pix_format *pix = &fmt->fmt.pix;
|
|
|
|
if (pix->height < 60 || pix->width < 80) {
|
|
pix->height = 60;
|
|
pix->width = 80;
|
|
} else if (pix->height < 120 || pix->width < 160) {
|
|
pix->height = 120;
|
|
pix->width = 160;
|
|
} else {
|
|
pix->height = 240;
|
|
pix->width = 320;
|
|
}
|
|
pix->pixelformat = V4L2_PIX_FMT_RGB24;
|
|
pix->field = V4L2_FIELD_NONE;
|
|
pix->bytesperline = 3 * pix->width;
|
|
pix->sizeimage = 3 * pix->width * pix->height;
|
|
/* Just a guess */
|
|
pix->colorspace = V4L2_COLORSPACE_SRGB;
|
|
return 0;
|
|
}
|
|
|
|
static int qcam_s_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt)
|
|
{
|
|
struct qcam *qcam = video_drvdata(file);
|
|
struct v4l2_pix_format *pix = &fmt->fmt.pix;
|
|
int ret = qcam_try_fmt_vid_cap(file, fh, fmt);
|
|
|
|
if (ret)
|
|
return ret;
|
|
switch (pix->height) {
|
|
case 60:
|
|
qcam->mode = QC_DECIMATION_4;
|
|
break;
|
|
case 120:
|
|
qcam->mode = QC_DECIMATION_2;
|
|
break;
|
|
default:
|
|
qcam->mode = QC_DECIMATION_1;
|
|
break;
|
|
}
|
|
|
|
mutex_lock(&qcam->lock);
|
|
qcam->mode |= QC_MILLIONS;
|
|
qcam->height = pix->height;
|
|
qcam->width = pix->width;
|
|
parport_claim_or_block(qcam->pdev);
|
|
qc_setup(qcam);
|
|
parport_release(qcam->pdev);
|
|
mutex_unlock(&qcam->lock);
|
|
return 0;
|
|
}
|
|
|
|
static int qcam_enum_fmt_vid_cap(struct file *file, void *fh, struct v4l2_fmtdesc *fmt)
|
|
{
|
|
static struct v4l2_fmtdesc formats[] = {
|
|
{ 0, 0, 0,
|
|
"RGB 8:8:8", V4L2_PIX_FMT_RGB24,
|
|
{ 0, 0, 0, 0 }
|
|
},
|
|
};
|
|
enum v4l2_buf_type type = fmt->type;
|
|
|
|
if (fmt->index > 0)
|
|
return -EINVAL;
|
|
|
|
*fmt = formats[fmt->index];
|
|
fmt->type = type;
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t qcam_read(struct file *file, char __user *buf,
|
|
size_t count, loff_t *ppos)
|
|
{
|
|
struct qcam *qcam = video_drvdata(file);
|
|
int len;
|
|
|
|
mutex_lock(&qcam->lock);
|
|
parport_claim_or_block(qcam->pdev);
|
|
/* Probably should have a semaphore against multiple users */
|
|
len = qc_capture(qcam, buf, count);
|
|
parport_release(qcam->pdev);
|
|
mutex_unlock(&qcam->lock);
|
|
return len;
|
|
}
|
|
|
|
static const struct v4l2_file_operations qcam_fops = {
|
|
.owner = THIS_MODULE,
|
|
.unlocked_ioctl = video_ioctl2,
|
|
.read = qcam_read,
|
|
};
|
|
|
|
static const struct v4l2_ioctl_ops qcam_ioctl_ops = {
|
|
.vidioc_querycap = qcam_querycap,
|
|
.vidioc_g_input = qcam_g_input,
|
|
.vidioc_s_input = qcam_s_input,
|
|
.vidioc_enum_input = qcam_enum_input,
|
|
.vidioc_queryctrl = qcam_queryctrl,
|
|
.vidioc_g_ctrl = qcam_g_ctrl,
|
|
.vidioc_s_ctrl = qcam_s_ctrl,
|
|
.vidioc_enum_fmt_vid_cap = qcam_enum_fmt_vid_cap,
|
|
.vidioc_g_fmt_vid_cap = qcam_g_fmt_vid_cap,
|
|
.vidioc_s_fmt_vid_cap = qcam_s_fmt_vid_cap,
|
|
.vidioc_try_fmt_vid_cap = qcam_try_fmt_vid_cap,
|
|
};
|
|
|
|
/* Initialize the QuickCam driver control structure. */
|
|
|
|
static struct qcam *qcam_init(struct parport *port)
|
|
{
|
|
struct qcam *qcam;
|
|
struct v4l2_device *v4l2_dev;
|
|
|
|
qcam = kzalloc(sizeof(*qcam), GFP_KERNEL);
|
|
if (qcam == NULL)
|
|
return NULL;
|
|
|
|
v4l2_dev = &qcam->v4l2_dev;
|
|
strlcpy(v4l2_dev->name, "c-qcam", sizeof(v4l2_dev->name));
|
|
|
|
if (v4l2_device_register(NULL, v4l2_dev) < 0) {
|
|
v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
|
|
kfree(qcam);
|
|
return NULL;
|
|
}
|
|
|
|
qcam->pport = port;
|
|
qcam->pdev = parport_register_device(port, "c-qcam", NULL, NULL,
|
|
NULL, 0, NULL);
|
|
|
|
qcam->bidirectional = (qcam->pport->modes & PARPORT_MODE_TRISTATE) ? 1 : 0;
|
|
|
|
if (qcam->pdev == NULL) {
|
|
v4l2_err(v4l2_dev, "couldn't register for %s.\n", port->name);
|
|
kfree(qcam);
|
|
return NULL;
|
|
}
|
|
|
|
strlcpy(qcam->vdev.name, "Colour QuickCam", sizeof(qcam->vdev.name));
|
|
qcam->vdev.v4l2_dev = v4l2_dev;
|
|
qcam->vdev.fops = &qcam_fops;
|
|
qcam->vdev.ioctl_ops = &qcam_ioctl_ops;
|
|
qcam->vdev.release = video_device_release_empty;
|
|
video_set_drvdata(&qcam->vdev, qcam);
|
|
|
|
mutex_init(&qcam->lock);
|
|
qcam->width = qcam->ccd_width = 320;
|
|
qcam->height = qcam->ccd_height = 240;
|
|
qcam->mode = QC_MILLIONS | QC_DECIMATION_1;
|
|
qcam->contrast = 192;
|
|
qcam->brightness = 240;
|
|
qcam->whitebal = 128;
|
|
qcam->top = 1;
|
|
qcam->left = 14;
|
|
return qcam;
|
|
}
|
|
|
|
static int init_cqcam(struct parport *port)
|
|
{
|
|
struct qcam *qcam;
|
|
struct v4l2_device *v4l2_dev;
|
|
|
|
if (parport[0] != -1) {
|
|
/* The user gave specific instructions */
|
|
int i, found = 0;
|
|
|
|
for (i = 0; i < MAX_CAMS && parport[i] != -1; i++) {
|
|
if (parport[0] == port->number)
|
|
found = 1;
|
|
}
|
|
if (!found)
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (num_cams == MAX_CAMS)
|
|
return -ENOSPC;
|
|
|
|
qcam = qcam_init(port);
|
|
if (qcam == NULL)
|
|
return -ENODEV;
|
|
|
|
v4l2_dev = &qcam->v4l2_dev;
|
|
|
|
parport_claim_or_block(qcam->pdev);
|
|
|
|
qc_reset(qcam);
|
|
|
|
if (probe && qc_detect(qcam) == 0) {
|
|
parport_release(qcam->pdev);
|
|
parport_unregister_device(qcam->pdev);
|
|
kfree(qcam);
|
|
return -ENODEV;
|
|
}
|
|
|
|
qc_setup(qcam);
|
|
|
|
parport_release(qcam->pdev);
|
|
|
|
if (video_register_device(&qcam->vdev, VFL_TYPE_GRABBER, video_nr) < 0) {
|
|
v4l2_err(v4l2_dev, "Unable to register Colour QuickCam on %s\n",
|
|
qcam->pport->name);
|
|
parport_unregister_device(qcam->pdev);
|
|
kfree(qcam);
|
|
return -ENODEV;
|
|
}
|
|
|
|
v4l2_info(v4l2_dev, "%s: Colour QuickCam found on %s\n",
|
|
video_device_node_name(&qcam->vdev), qcam->pport->name);
|
|
|
|
qcams[num_cams++] = qcam;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void close_cqcam(struct qcam *qcam)
|
|
{
|
|
video_unregister_device(&qcam->vdev);
|
|
parport_unregister_device(qcam->pdev);
|
|
kfree(qcam);
|
|
}
|
|
|
|
static void cq_attach(struct parport *port)
|
|
{
|
|
init_cqcam(port);
|
|
}
|
|
|
|
static void cq_detach(struct parport *port)
|
|
{
|
|
/* Write this some day. */
|
|
}
|
|
|
|
static struct parport_driver cqcam_driver = {
|
|
.name = "cqcam",
|
|
.attach = cq_attach,
|
|
.detach = cq_detach,
|
|
};
|
|
|
|
static int __init cqcam_init(void)
|
|
{
|
|
printk(KERN_INFO BANNER "\n");
|
|
|
|
return parport_register_driver(&cqcam_driver);
|
|
}
|
|
|
|
static void __exit cqcam_cleanup(void)
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < num_cams; i++)
|
|
close_cqcam(qcams[i]);
|
|
|
|
parport_unregister_driver(&cqcam_driver);
|
|
}
|
|
|
|
MODULE_AUTHOR("Philip Blundell <philb@gnu.org>");
|
|
MODULE_DESCRIPTION(BANNER);
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_VERSION("0.0.4");
|
|
|
|
module_init(cqcam_init);
|
|
module_exit(cqcam_cleanup);
|