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Diffstat (limited to 'drivers/staging/media/parport/c-qcam.c')
-rw-r--r--drivers/staging/media/parport/c-qcam.c882
1 files changed, 0 insertions, 882 deletions
diff --git a/drivers/staging/media/parport/c-qcam.c b/drivers/staging/media/parport/c-qcam.c
deleted file mode 100644
index b9010bd3ed3e..000000000000
--- a/drivers/staging/media/parport/c-qcam.c
+++ /dev/null
@@ -1,882 +0,0 @@
-/*
- * Video4Linux Colour QuickCam driver
- * Copyright 1997-2000 Philip Blundell <philb@gnu.org>
- *
- * Module parameters:
- *
- * parport=auto -- probe all parports (default)
- * parport=0 -- parport0 becomes qcam1
- * parport=2,0,1 -- parports 2,0,1 are tried in that order
- *
- * probe=0 -- do no probing, assume camera is present
- * probe=1 -- use IEEE-1284 autoprobe data only (default)
- * probe=2 -- probe aggressively for cameras
- *
- * force_rgb=1 -- force data format to RGB (default is BGR)
- *
- * The parport parameter controls which parports will be scanned.
- * Scanning all parports causes some printers to print a garbage page.
- * -- March 14, 1999 Billy Donahue <billy@escape.com>
- *
- * Fixed data format to BGR, added force_rgb parameter. Added missing
- * parport_unregister_driver() on module removal.
- * -- May 28, 2000 Claudio Matsuoka <claudio@conectiva.com>
- */
-
-#include <linux/module.h>
-#include <linux/delay.h>
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/mm.h>
-#include <linux/parport.h>
-#include <linux/sched.h>
-#include <linux/mutex.h>
-#include <linux/jiffies.h>
-#include <linux/videodev2.h>
-#include <asm/uaccess.h>
-#include <media/v4l2-device.h>
-#include <media/v4l2-common.h>
-#include <media/v4l2-ioctl.h>
-#include <media/v4l2-fh.h>
-#include <media/v4l2-ctrls.h>
-#include <media/v4l2-event.h>
-
-struct qcam {
- struct v4l2_device v4l2_dev;
- struct video_device vdev;
- struct v4l2_ctrl_handler hdl;
- struct pardevice *pdev;
- struct parport *pport;
- int width, height;
- int ccd_width, ccd_height;
- int mode;
- int contrast, brightness, whitebal;
- int top, left;
- unsigned int bidirectional;
- struct mutex lock;
-};
-
-/* cameras maximum */
-#define MAX_CAMS 4
-
-/* The three possible QuickCam modes */
-#define QC_MILLIONS 0x18
-#define QC_BILLIONS 0x10
-#define QC_THOUSANDS 0x08 /* with VIDEC compression (not supported) */
-
-/* The three possible decimations */
-#define QC_DECIMATION_1 0
-#define QC_DECIMATION_2 2
-#define QC_DECIMATION_4 4
-
-#define BANNER "Colour QuickCam for Video4Linux v0.06"
-
-static int parport[MAX_CAMS] = { [1 ... MAX_CAMS-1] = -1 };
-static int probe = 2;
-static bool force_rgb;
-static int video_nr = -1;
-
-/* FIXME: parport=auto would never have worked, surely? --RR */
-MODULE_PARM_DESC(parport, "parport=<auto|n[,n]...> for port detection method\n"
- "probe=<0|1|2> for camera detection method\n"
- "force_rgb=<0|1> for RGB data format (default BGR)");
-module_param_array(parport, int, NULL, 0);
-module_param(probe, int, 0);
-module_param(force_rgb, bool, 0);
-module_param(video_nr, int, 0);
-
-static struct qcam *qcams[MAX_CAMS];
-static unsigned int num_cams;
-
-static inline void qcam_set_ack(struct qcam *qcam, unsigned int i)
-{
- /* note: the QC specs refer to the PCAck pin by voltage, not
- software level. PC ports have builtin inverters. */
- parport_frob_control(qcam->pport, 8, i ? 8 : 0);
-}
-
-static inline unsigned int qcam_ready1(struct qcam *qcam)
-{
- return (parport_read_status(qcam->pport) & 0x8) ? 1 : 0;
-}
-
-static inline unsigned int qcam_ready2(struct qcam *qcam)
-{
- return (parport_read_data(qcam->pport) & 0x1) ? 1 : 0;
-}
-
-static unsigned int qcam_await_ready1(struct qcam *qcam, int value)
-{
- struct v4l2_device *v4l2_dev = &qcam->v4l2_dev;
- unsigned long oldjiffies = jiffies;
- unsigned int i;
-
- for (oldjiffies = jiffies;
- time_before(jiffies, oldjiffies + msecs_to_jiffies(40));)
- if (qcam_ready1(qcam) == value)
- return 0;
-
- /* If the camera didn't respond within 1/25 second, poll slowly
- for a while. */
- for (i = 0; i < 50; i++) {
- if (qcam_ready1(qcam) == value)
- return 0;
- msleep_interruptible(100);
- }
-
- /* Probably somebody pulled the plug out. Not much we can do. */
- v4l2_err(v4l2_dev, "ready1 timeout (%d) %x %x\n", value,
- parport_read_status(qcam->pport),
- parport_read_control(qcam->pport));
- return 1;
-}
-
-static unsigned int qcam_await_ready2(struct qcam *qcam, int value)
-{
- struct v4l2_device *v4l2_dev = &qcam->v4l2_dev;
- unsigned long oldjiffies = jiffies;
- unsigned int i;
-
- for (oldjiffies = jiffies;
- time_before(jiffies, oldjiffies + msecs_to_jiffies(40));)
- if (qcam_ready2(qcam) == value)
- return 0;
-
- /* If the camera didn't respond within 1/25 second, poll slowly
- for a while. */
- for (i = 0; i < 50; i++) {
- if (qcam_ready2(qcam) == value)
- return 0;
- msleep_interruptible(100);
- }
-
- /* Probably somebody pulled the plug out. Not much we can do. */
- v4l2_err(v4l2_dev, "ready2 timeout (%d) %x %x %x\n", value,
- parport_read_status(qcam->pport),
- parport_read_control(qcam->pport),
- parport_read_data(qcam->pport));
- return 1;
-}
-
-static int qcam_read_data(struct qcam *qcam)
-{
- unsigned int idata;
-
- qcam_set_ack(qcam, 0);
- if (qcam_await_ready1(qcam, 1))
- return -1;
- idata = parport_read_status(qcam->pport) & 0xf0;
- qcam_set_ack(qcam, 1);
- if (qcam_await_ready1(qcam, 0))
- return -1;
- idata |= parport_read_status(qcam->pport) >> 4;
- return idata;
-}
-
-static int qcam_write_data(struct qcam *qcam, unsigned int data)
-{
- struct v4l2_device *v4l2_dev = &qcam->v4l2_dev;
- unsigned int idata;
-
- parport_write_data(qcam->pport, data);
- idata = qcam_read_data(qcam);
- if (data != idata) {
- v4l2_warn(v4l2_dev, "sent %x but received %x\n", data,
- idata);
- return 1;
- }
- return 0;
-}
-
-static inline int qcam_set(struct qcam *qcam, unsigned int cmd, unsigned int data)
-{
- if (qcam_write_data(qcam, cmd))
- return -1;
- if (qcam_write_data(qcam, data))
- return -1;
- return 0;
-}
-
-static inline int qcam_get(struct qcam *qcam, unsigned int cmd)
-{
- if (qcam_write_data(qcam, cmd))
- return -1;
- return qcam_read_data(qcam);
-}
-
-static int qc_detect(struct qcam *qcam)
-{
- unsigned int stat, ostat, i, count = 0;
-
- /* The probe routine below is not very reliable. The IEEE-1284
- probe takes precedence. */
- /* XXX Currently parport provides no way to distinguish between
- "the IEEE probe was not done" and "the probe was done, but
- no device was found". Fix this one day. */
- if (qcam->pport->probe_info[0].class == PARPORT_CLASS_MEDIA
- && qcam->pport->probe_info[0].model
- && !strcmp(qcam->pdev->port->probe_info[0].model,
- "Color QuickCam 2.0")) {
- printk(KERN_DEBUG "QuickCam: Found by IEEE1284 probe.\n");
- return 1;
- }
-
- if (probe < 2)
- return 0;
-
- parport_write_control(qcam->pport, 0xc);
-
- /* look for a heartbeat */
- ostat = stat = parport_read_status(qcam->pport);
- for (i = 0; i < 250; i++) {
- mdelay(1);
- stat = parport_read_status(qcam->pport);
- if (ostat != stat) {
- if (++count >= 3)
- return 1;
- ostat = stat;
- }
- }
-
- /* Reset the camera and try again */
- parport_write_control(qcam->pport, 0xc);
- parport_write_control(qcam->pport, 0x8);
- mdelay(1);
- parport_write_control(qcam->pport, 0xc);
- mdelay(1);
- count = 0;
-
- ostat = stat = parport_read_status(qcam->pport);
- for (i = 0; i < 250; i++) {
- mdelay(1);
- stat = parport_read_status(qcam->pport);
- if (ostat != stat) {
- if (++count >= 3)
- return 1;
- ostat = stat;
- }
- }
-
- /* no (or flatline) camera, give up */
- return 0;
-}
-
-static void qc_reset(struct qcam *qcam)
-{
- parport_write_control(qcam->pport, 0xc);
- parport_write_control(qcam->pport, 0x8);
- mdelay(1);
- parport_write_control(qcam->pport, 0xc);
- mdelay(1);
-}
-
-/* Reset the QuickCam and program for brightness, contrast,
- * white-balance, and resolution. */
-
-static void qc_setup(struct qcam *qcam)
-{
- qc_reset(qcam);
-
- /* Set the brightness. */
- qcam_set(qcam, 11, qcam->brightness);
-
- /* Set the height and width. These refer to the actual
- CCD area *before* applying the selected decimation. */
- qcam_set(qcam, 17, qcam->ccd_height);
- qcam_set(qcam, 19, qcam->ccd_width / 2);
-
- /* Set top and left. */
- qcam_set(qcam, 0xd, qcam->top);
- qcam_set(qcam, 0xf, qcam->left);
-
- /* Set contrast and white balance. */
- qcam_set(qcam, 0x19, qcam->contrast);
- qcam_set(qcam, 0x1f, qcam->whitebal);
-
- /* Set the speed. */
- qcam_set(qcam, 45, 2);
-}
-
-/* Read some bytes from the camera and put them in the buffer.
- nbytes should be a multiple of 3, because bidirectional mode gives
- us three bytes at a time. */
-
-static unsigned int qcam_read_bytes(struct qcam *qcam, unsigned char *buf, unsigned int nbytes)
-{
- unsigned int bytes = 0;
-
- qcam_set_ack(qcam, 0);
- if (qcam->bidirectional) {
- /* It's a bidirectional port */
- while (bytes < nbytes) {
- unsigned int lo1, hi1, lo2, hi2;
- unsigned char r, g, b;
-
- if (qcam_await_ready2(qcam, 1))
- return bytes;
- lo1 = parport_read_data(qcam->pport) >> 1;
- hi1 = ((parport_read_status(qcam->pport) >> 3) & 0x1f) ^ 0x10;
- qcam_set_ack(qcam, 1);
- if (qcam_await_ready2(qcam, 0))
- return bytes;
- lo2 = parport_read_data(qcam->pport) >> 1;
- hi2 = ((parport_read_status(qcam->pport) >> 3) & 0x1f) ^ 0x10;
- qcam_set_ack(qcam, 0);
- r = lo1 | ((hi1 & 1) << 7);
- g = ((hi1 & 0x1e) << 3) | ((hi2 & 0x1e) >> 1);
- b = lo2 | ((hi2 & 1) << 7);
- if (force_rgb) {
- buf[bytes++] = r;
- buf[bytes++] = g;
- buf[bytes++] = b;
- } else {
- buf[bytes++] = b;
- buf[bytes++] = g;
- buf[bytes++] = r;
- }
- }
- } else {
- /* It's a unidirectional port */
- int i = 0, n = bytes;
- unsigned char rgb[3];
-
- while (bytes < nbytes) {
- unsigned int hi, lo;
-
- if (qcam_await_ready1(qcam, 1))
- return bytes;
- hi = (parport_read_status(qcam->pport) & 0xf0);
- qcam_set_ack(qcam, 1);
- if (qcam_await_ready1(qcam, 0))
- return bytes;
- lo = (parport_read_status(qcam->pport) & 0xf0);
- qcam_set_ack(qcam, 0);
- /* flip some bits */
- rgb[(i = bytes++ % 3)] = (hi | (lo >> 4)) ^ 0x88;
- if (i >= 2) {
-get_fragment:
- if (force_rgb) {
- buf[n++] = rgb[0];
- buf[n++] = rgb[1];
- buf[n++] = rgb[2];
- } else {
- buf[n++] = rgb[2];
- buf[n++] = rgb[1];
- buf[n++] = rgb[0];
- }
- }
- }
- if (i) {
- i = 0;
- goto get_fragment;
- }
- }
- return bytes;
-}
-
-#define BUFSZ 150
-
-static long qc_capture(struct qcam *qcam, char __user *buf, unsigned long len)
-{
- struct v4l2_device *v4l2_dev = &qcam->v4l2_dev;
- unsigned lines, pixelsperline;
- unsigned int is_bi_dir = qcam->bidirectional;
- size_t wantlen, outptr = 0;
- char tmpbuf[BUFSZ];
-
- if (!access_ok(VERIFY_WRITE, buf, len))
- return -EFAULT;
-
- /* Wait for camera to become ready */
- for (;;) {
- int i = qcam_get(qcam, 41);
-
- if (i == -1) {
- qc_setup(qcam);
- return -EIO;
- }
- if ((i & 0x80) == 0)
- break;
- schedule();
- }
-
- if (qcam_set(qcam, 7, (qcam->mode | (is_bi_dir ? 1 : 0)) + 1))
- return -EIO;
-
- lines = qcam->height;
- pixelsperline = qcam->width;
-
- if (is_bi_dir) {
- /* Turn the port around */
- parport_data_reverse(qcam->pport);
- mdelay(3);
- qcam_set_ack(qcam, 0);
- if (qcam_await_ready1(qcam, 1)) {
- qc_setup(qcam);
- return -EIO;
- }
- qcam_set_ack(qcam, 1);
- if (qcam_await_ready1(qcam, 0)) {
- qc_setup(qcam);
- return -EIO;
- }
- }
-
- wantlen = lines * pixelsperline * 24 / 8;
-
- while (wantlen) {
- size_t t, s;
-
- s = (wantlen > BUFSZ) ? BUFSZ : wantlen;
- t = qcam_read_bytes(qcam, tmpbuf, s);
- if (outptr < len) {
- size_t sz = len - outptr;
-
- if (sz > t)
- sz = t;
- if (__copy_to_user(buf + outptr, tmpbuf, sz))
- break;
- outptr += sz;
- }
- wantlen -= t;
- if (t < s)
- break;
- cond_resched();
- }
-
- len = outptr;
-
- if (wantlen) {
- v4l2_err(v4l2_dev, "short read.\n");
- if (is_bi_dir)
- parport_data_forward(qcam->pport);
- qc_setup(qcam);
- return len;
- }
-
- if (is_bi_dir) {
- int l;
-
- do {
- l = qcam_read_bytes(qcam, tmpbuf, 3);
- cond_resched();
- } while (l && (tmpbuf[0] == 0x7e || tmpbuf[1] == 0x7e || tmpbuf[2] == 0x7e));
- if (force_rgb) {
- 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_set_ack(qcam, 0);
- if (qcam_await_ready1(qcam, 1)) {
- v4l2_err(v4l2_dev, "no ack after EOF\n");
- parport_data_forward(qcam->pport);
- qc_setup(qcam);
- return len;
- }
- parport_data_forward(qcam->pport);
- mdelay(3);
- qcam_set_ack(qcam, 1);
- if (qcam_await_ready1(qcam, 0)) {
- v4l2_err(v4l2_dev, "no ack to port turnaround\n");
- qc_setup(qcam);
- return len;
- }
- } else {
- int l;
-
- do {
- l = qcam_read_bytes(qcam, tmpbuf, 1);
- cond_resched();
- } while (l && tmpbuf[0] == 0x7e);
- l = qcam_read_bytes(qcam, tmpbuf + 1, 2);
- if (force_rgb) {
- 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->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE;
- vcap->capabilities = vcap->device_caps | V4L2_CAP_DEVICE_CAPS;
- 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_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 int qcam_s_ctrl(struct v4l2_ctrl *ctrl)
-{
- struct qcam *qcam =
- container_of(ctrl->handler, struct qcam, hdl);
- int ret = 0;
-
- mutex_lock(&qcam->lock);
- switch (ctrl->id) {
- case V4L2_CID_BRIGHTNESS:
- qcam->brightness = ctrl->val;
- break;
- case V4L2_CID_CONTRAST:
- qcam->contrast = ctrl->val;
- break;
- case V4L2_CID_GAMMA:
- qcam->whitebal = ctrl->val;
- 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 const struct v4l2_file_operations qcam_fops = {
- .owner = THIS_MODULE,
- .open = v4l2_fh_open,
- .release = v4l2_fh_release,
- .poll = v4l2_ctrl_poll,
- .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_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,
- .vidioc_log_status = v4l2_ctrl_log_status,
- .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
- .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
-};
-
-static const struct v4l2_ctrl_ops qcam_ctrl_ops = {
- .s_ctrl = qcam_s_ctrl,
-};
-
-/* 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;
- }
-
- v4l2_ctrl_handler_init(&qcam->hdl, 3);
- v4l2_ctrl_new_std(&qcam->hdl, &qcam_ctrl_ops,
- V4L2_CID_BRIGHTNESS, 0, 255, 1, 240);
- v4l2_ctrl_new_std(&qcam->hdl, &qcam_ctrl_ops,
- V4L2_CID_CONTRAST, 0, 255, 1, 192);
- v4l2_ctrl_new_std(&qcam->hdl, &qcam_ctrl_ops,
- V4L2_CID_GAMMA, 0, 255, 1, 128);
- if (qcam->hdl.error) {
- v4l2_err(v4l2_dev, "couldn't register controls\n");
- v4l2_ctrl_handler_free(&qcam->hdl);
- 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);
- v4l2_ctrl_handler_free(&qcam->hdl);
- 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;
- qcam->vdev.ctrl_handler = &qcam->hdl;
- 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);
- v4l2_ctrl_handler_free(&qcam->hdl);
- 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);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.