patch-2.4.0-test7 linux/drivers/char/bw-qcam.c
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- Lines: 1067
- Date:
Wed Dec 31 16:00:00 1969
- Orig file:
v2.4.0-test6/linux/drivers/char/bw-qcam.c
- Orig date:
Mon Oct 4 15:49:29 1999
diff -u --recursive --new-file v2.4.0-test6/linux/drivers/char/bw-qcam.c linux/drivers/char/bw-qcam.c
@@ -1,1066 +0,0 @@
-/*
- * QuickCam Driver For Video4Linux.
- *
- * This version only works as a module.
- *
- * Video4Linux conversion work by Alan Cox.
- * Parport compatibility by Phil Blundell.
- * Busy loop avoidance by Mark Cooke.
- *
- * Module parameters:
- *
- * maxpoll=<1 - 5000>
- *
- * When polling the QuickCam for a response, busy-wait for a
- * maximum of this many loops. The default of 250 gives little
- * impact on interactive response.
- *
- * NOTE: If this parameter is set too high, the processor
- * will busy wait until this loop times out, and then
- * slowly poll for a further 5 seconds before failing
- * the transaction. You have been warned.
- *
- * yieldlines=<1 - 250>
- *
- * When acquiring a frame from the camera, the data gathering
- * loop will yield back to the scheduler after completing
- * this many lines. The default of 4 provides a trade-off
- * between increased frame acquisition time and impact on
- * interactive response.
- */
-
-/* qcam-lib.c -- Library for programming with the Connectix QuickCam.
- * See the included documentation for usage instructions and details
- * of the protocol involved. */
-
-
-/* Version 0.5, August 4, 1996 */
-/* Version 0.7, August 27, 1996 */
-/* Version 0.9, November 17, 1996 */
-
-
-/******************************************************************
-
-Copyright (C) 1996 by Scott Laird
-
-Permission is hereby granted, free of charge, to any person obtaining
-a copy of this software and associated documentation files (the
-"Software"), to deal in the Software without restriction, including
-without limitation the rights to use, copy, modify, merge, publish,
-distribute, sublicense, and/or sell copies of the Software, and to
-permit persons to whom the Software is furnished to do so, subject to
-the following conditions:
-
-The above copyright notice and this permission notice shall be
-included in all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
-IN NO EVENT SHALL SCOTT LAIRD BE LIABLE FOR ANY CLAIM, DAMAGES OR
-OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
-ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
-OTHER DEALINGS IN THE SOFTWARE.
-
-******************************************************************/
-
-#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/malloc.h>
-#include <linux/mm.h>
-#include <linux/parport.h>
-#include <linux/sched.h>
-#include <linux/version.h>
-#include <linux/videodev.h>
-#include <asm/semaphore.h>
-#include <asm/uaccess.h>
-
-#include "bw-qcam.h"
-
-static unsigned int maxpoll=250; /* Maximum busy-loop count for qcam I/O */
-static unsigned int yieldlines=4; /* Yield after this many during capture */
-
-#if LINUX_VERSION_CODE >= 0x020117
-MODULE_PARM(maxpoll,"i");
-MODULE_PARM(yieldlines,"i");
-#endif
-
-extern __inline__ int read_lpstatus(struct qcam_device *q)
-{
- return parport_read_status(q->pport);
-}
-
-extern __inline__ int read_lpcontrol(struct qcam_device *q)
-{
- return parport_read_control(q->pport);
-}
-
-extern __inline__ int read_lpdata(struct qcam_device *q)
-{
- return parport_read_data(q->pport);
-}
-
-extern __inline__ void write_lpdata(struct qcam_device *q, int d)
-{
- parport_write_data(q->pport, d);
-}
-
-extern __inline__ void write_lpcontrol(struct qcam_device *q, int d)
-{
- parport_write_control(q->pport, d);
-}
-
-static int qc_waithand(struct qcam_device *q, int val);
-static int qc_command(struct qcam_device *q, int command);
-static int qc_readparam(struct qcam_device *q);
-static int qc_setscanmode(struct qcam_device *q);
-static int qc_readbytes(struct qcam_device *q, char buffer[]);
-
-static struct video_device qcam_template;
-
-static int qc_calibrate(struct qcam_device *q)
-{
- /*
- * Bugfix by Hanno Mueller hmueller@kabel.de, Mai 21 96
- * The white balance is an individiual value for each
- * quickcam.
- */
-
- int value;
- int count = 0;
-
- qc_command(q, 27); /* AutoAdjustOffset */
- qc_command(q, 0); /* Dummy Parameter, ignored by the camera */
-
- /* GetOffset (33) will read 255 until autocalibration */
- /* is finished. After that, a value of 1-254 will be */
- /* returned. */
-
- do {
- qc_command(q, 33);
- value = qc_readparam(q);
- mdelay(1);
- schedule();
- count++;
- } while (value == 0xff && count<2048);
-
- q->whitebal = value;
- return value;
-}
-
-/* Initialize the QuickCam driver control structure. This is where
- * defaults are set for people who don't have a config file.*/
-
-static struct qcam_device *qcam_init(struct parport *port)
-{
- struct qcam_device *q;
-
- q = kmalloc(sizeof(struct qcam_device), GFP_KERNEL);
- if(q==NULL)
- return NULL;
-
- q->pport = port;
- q->pdev = parport_register_device(port, "bw-qcam", NULL, NULL,
- NULL, 0, NULL);
- if (q->pdev == NULL)
- {
- printk(KERN_ERR "bw-qcam: couldn't register for %s.\n",
- port->name);
- kfree(q);
- return NULL;
- }
-
- memcpy(&q->vdev, &qcam_template, sizeof(qcam_template));
-
- init_MUTEX(&q->lock);
-
- q->port_mode = (QC_ANY | QC_NOTSET);
- q->width = 320;
- q->height = 240;
- q->bpp = 4;
- q->transfer_scale = 2;
- q->contrast = 192;
- q->brightness = 180;
- q->whitebal = 105;
- q->top = 1;
- q->left = 14;
- q->mode = -1;
- q->status = QC_PARAM_CHANGE;
- return q;
-}
-
-
-/* qc_command is probably a bit of a misnomer -- it's used to send
- * bytes *to* the camera. Generally, these bytes are either commands
- * or arguments to commands, so the name fits, but it still bugs me a
- * bit. See the documentation for a list of commands. */
-
-static int qc_command(struct qcam_device *q, int command)
-{
- int n1, n2;
- int cmd;
-
- write_lpdata(q, command);
- write_lpcontrol(q, 6);
-
- n1 = qc_waithand(q, 1);
-
- write_lpcontrol(q, 0xe);
- n2 = qc_waithand(q, 0);
-
- cmd = (n1 & 0xf0) | ((n2 & 0xf0) >> 4);
- return cmd;
-}
-
-static int qc_readparam(struct qcam_device *q)
-{
- int n1, n2;
- int cmd;
-
- write_lpcontrol(q, 6);
- n1 = qc_waithand(q, 1);
-
- write_lpcontrol(q, 0xe);
- n2 = qc_waithand(q, 0);
-
- cmd = (n1 & 0xf0) | ((n2 & 0xf0) >> 4);
- return cmd;
-}
-
-/* qc_waithand busy-waits for a handshake signal from the QuickCam.
- * Almost all communication with the camera requires handshaking. */
-
-static int qc_waithand(struct qcam_device *q, int val)
-{
- int status;
- int runs=0;
-
- if (val)
- {
- while (!((status = read_lpstatus(q)) & 8))
- {
- /* 1000 is enough spins on the I/O for all normal
- cases, at that point we start to poll slowly
- until the camera wakes up. However, we are
- busy blocked until the camera responds, so
- setting it lower is much better for interactive
- response. */
-
- if(runs++>maxpoll)
- {
- current->state=TASK_INTERRUPTIBLE;
- schedule_timeout(HZ/200);
- }
- if(runs>(maxpoll+1000)) /* 5 seconds */
- return -1;
- }
- }
- else
- {
- while (((status = read_lpstatus(q)) & 8))
- {
- /* 1000 is enough spins on the I/O for all normal
- cases, at that point we start to poll slowly
- until the camera wakes up. However, we are
- busy blocked until the camera responds, so
- setting it lower is much better for interactive
- response. */
-
- if(runs++>maxpoll)
- {
- current->state=TASK_INTERRUPTIBLE;
- schedule_timeout(HZ/200);
- }
- if(runs++>(maxpoll+1000)) /* 5 seconds */
- return -1;
- }
- }
-
- return status;
-}
-
-/* Waithand2 is used when the qcam is in bidirectional mode, and the
- * handshaking signal is CamRdy2 (bit 0 of data reg) instead of CamRdy1
- * (bit 3 of status register). It also returns the last value read,
- * since this data is useful. */
-
-static unsigned int qc_waithand2(struct qcam_device *q, int val)
-{
- unsigned int status;
- int runs=0;
-
- do
- {
- status = read_lpdata(q);
- /* 1000 is enough spins on the I/O for all normal
- cases, at that point we start to poll slowly
- until the camera wakes up. However, we are
- busy blocked until the camera responds, so
- setting it lower is much better for interactive
- response. */
-
- if(runs++>maxpoll)
- {
- current->state=TASK_INTERRUPTIBLE;
- schedule_timeout(HZ/200);
- }
- if(runs++>(maxpoll+1000)) /* 5 seconds */
- return 0;
- }
- while ((status & 1) != val);
-
- return status;
-}
-
-
-/* Try to detect a QuickCam. It appears to flash the upper 4 bits of
- the status register at 5-10 Hz. This is only used in the autoprobe
- code. Be aware that this isn't the way Connectix detects the
- camera (they send a reset and try to handshake), but this should be
- almost completely safe, while their method screws up my printer if
- I plug it in before the camera. */
-
-static int qc_detect(struct qcam_device *q)
-{
- int reg, lastreg;
- int count = 0;
- int i;
-
- lastreg = reg = read_lpstatus(q) & 0xf0;
-
- for (i = 0; i < 500; i++)
- {
- reg = read_lpstatus(q) & 0xf0;
- if (reg != lastreg)
- count++;
- lastreg = reg;
- mdelay(2);
- }
-
-
-#if 0
- /* Force camera detection during testing. Sometimes the camera
- won't be flashing these bits. Possibly unloading the module
- in the middle of a grab? Or some timeout condition?
- I've seen this parameter as low as 19 on my 450Mhz box - mpc */
- printk("Debugging: QCam detection counter <30-200 counts as detected>: %d\n", count);
- return 1;
-#endif
-
- /* Be (even more) liberal in what you accept... */
-
-/* if (count > 30 && count < 200) */
- if (count > 20 && count < 300)
- return 1; /* found */
- else
- return 0; /* not found */
-}
-
-
-/* Reset the QuickCam. This uses the same sequence the Windows
- * QuickPic program uses. Someone with a bi-directional port should
- * check that bi-directional mode is detected right, and then
- * implement bi-directional mode in qc_readbyte(). */
-
-static void qc_reset(struct qcam_device *q)
-{
- switch (q->port_mode & QC_FORCE_MASK)
- {
- case QC_FORCE_UNIDIR:
- q->port_mode = (q->port_mode & ~QC_MODE_MASK) | QC_UNIDIR;
- break;
-
- case QC_FORCE_BIDIR:
- q->port_mode = (q->port_mode & ~QC_MODE_MASK) | QC_BIDIR;
- break;
-
- case QC_ANY:
- write_lpcontrol(q, 0x20);
- write_lpdata(q, 0x75);
-
- if (read_lpdata(q) != 0x75) {
- q->port_mode = (q->port_mode & ~QC_MODE_MASK) | QC_BIDIR;
- } else {
- q->port_mode = (q->port_mode & ~QC_MODE_MASK) | QC_UNIDIR;
- }
- break;
- }
-
- write_lpcontrol(q, 0xb);
- udelay(250);
- write_lpcontrol(q, 0xe);
- qc_setscanmode(q); /* in case port_mode changed */
-}
-
-
-/* Decide which scan mode to use. There's no real requirement that
- * the scanmode match the resolution in q->height and q-> width -- the
- * camera takes the picture at the resolution specified in the
- * "scanmode" and then returns the image at the resolution specified
- * with the resolution commands. If the scan is bigger than the
- * requested resolution, the upper-left hand corner of the scan is
- * returned. If the scan is smaller, then the rest of the image
- * returned contains garbage. */
-
-static int qc_setscanmode(struct qcam_device *q)
-{
- int old_mode = q->mode;
-
- switch (q->transfer_scale)
- {
- case 1:
- q->mode = 0;
- break;
- case 2:
- q->mode = 4;
- break;
- case 4:
- q->mode = 8;
- break;
- }
-
- switch (q->bpp)
- {
- case 4:
- break;
- case 6:
- q->mode += 2;
- break;
- }
-
- switch (q->port_mode & QC_MODE_MASK)
- {
- case QC_BIDIR:
- q->mode += 1;
- break;
- case QC_NOTSET:
- case QC_UNIDIR:
- break;
- }
-
- if (q->mode != old_mode)
- q->status |= QC_PARAM_CHANGE;
-
- return 0;
-}
-
-
-/* Reset the QuickCam and program for brightness, contrast,
- * white-balance, and resolution. */
-
-void qc_set(struct qcam_device *q)
-{
- int val;
- int val2;
-
- qc_reset(q);
-
- /* Set the brightness. Yes, this is repetitive, but it works.
- * Shorter versions seem to fail subtly. Feel free to try :-). */
- /* I think the problem was in qc_command, not here -- bls */
-
- qc_command(q, 0xb);
- qc_command(q, q->brightness);
-
- val = q->height / q->transfer_scale;
- qc_command(q, 0x11);
- qc_command(q, val);
- if ((q->port_mode & QC_MODE_MASK) == QC_UNIDIR && q->bpp == 6) {
- /* The normal "transfers per line" calculation doesn't seem to work
- as expected here (and yet it works fine in qc_scan). No idea
- why this case is the odd man out. Fortunately, Laird's original
- working version gives me a good way to guess at working values.
- -- bls */
- val = q->width;
- val2 = q->transfer_scale * 4;
- } else {
- val = q->width * q->bpp;
- val2 = (((q->port_mode & QC_MODE_MASK) == QC_BIDIR) ? 24 : 8) *
- q->transfer_scale;
- }
- val = (val + val2 - 1) / val2;
- qc_command(q, 0x13);
- qc_command(q, val);
-
- /* Setting top and left -- bls */
- qc_command(q, 0xd);
- qc_command(q, q->top);
- qc_command(q, 0xf);
- qc_command(q, q->left / 2);
-
- qc_command(q, 0x19);
- qc_command(q, q->contrast);
- qc_command(q, 0x1f);
- qc_command(q, q->whitebal);
-
- /* Clear flag that we must update the grabbing parameters on the camera
- before we grab the next frame */
- q->status &= (~QC_PARAM_CHANGE);
-}
-
-/* Qc_readbytes reads some bytes from the QC and puts them in
- the supplied buffer. It returns the number of bytes read,
- or -1 on error. */
-
-extern __inline__ int qc_readbytes(struct qcam_device *q, char buffer[])
-{
- int ret=1;
- unsigned int hi, lo;
- unsigned int hi2, lo2;
- static int state = 0;
-
- if (buffer == NULL)
- {
- state = 0;
- return 0;
- }
-
- switch (q->port_mode & QC_MODE_MASK)
- {
- case QC_BIDIR: /* Bi-directional Port */
- write_lpcontrol(q, 0x26);
- lo = (qc_waithand2(q, 1) >> 1);
- hi = (read_lpstatus(q) >> 3) & 0x1f;
- write_lpcontrol(q, 0x2e);
- lo2 = (qc_waithand2(q, 0) >> 1);
- hi2 = (read_lpstatus(q) >> 3) & 0x1f;
- switch (q->bpp)
- {
- case 4:
- buffer[0] = lo & 0xf;
- buffer[1] = ((lo & 0x70) >> 4) | ((hi & 1) << 3);
- buffer[2] = (hi & 0x1e) >> 1;
- buffer[3] = lo2 & 0xf;
- buffer[4] = ((lo2 & 0x70) >> 4) | ((hi2 & 1) << 3);
- buffer[5] = (hi2 & 0x1e) >> 1;
- ret = 6;
- break;
- case 6:
- buffer[0] = lo & 0x3f;
- buffer[1] = ((lo & 0x40) >> 6) | (hi << 1);
- buffer[2] = lo2 & 0x3f;
- buffer[3] = ((lo2 & 0x40) >> 6) | (hi2 << 1);
- ret = 4;
- break;
- }
- break;
-
- case QC_UNIDIR: /* Unidirectional Port */
- write_lpcontrol(q, 6);
- lo = (qc_waithand(q, 1) & 0xf0) >> 4;
- write_lpcontrol(q, 0xe);
- hi = (qc_waithand(q, 0) & 0xf0) >> 4;
-
- switch (q->bpp)
- {
- case 4:
- buffer[0] = lo;
- buffer[1] = hi;
- ret = 2;
- break;
- case 6:
- switch (state)
- {
- case 0:
- buffer[0] = (lo << 2) | ((hi & 0xc) >> 2);
- q->saved_bits = (hi & 3) << 4;
- state = 1;
- ret = 1;
- break;
- case 1:
- buffer[0] = lo | q->saved_bits;
- q->saved_bits = hi << 2;
- state = 2;
- ret = 1;
- break;
- case 2:
- buffer[0] = ((lo & 0xc) >> 2) | q->saved_bits;
- buffer[1] = ((lo & 3) << 4) | hi;
- state = 0;
- ret = 2;
- break;
- }
- break;
- }
- break;
- }
- return ret;
-}
-
-/* requests a scan from the camera. It sends the correct instructions
- * to the camera and then reads back the correct number of bytes. In
- * previous versions of this routine the return structure contained
- * the raw output from the camera, and there was a 'qc_convertscan'
- * function that converted that to a useful format. In version 0.3 I
- * rolled qc_convertscan into qc_scan and now I only return the
- * converted scan. The format is just an one-dimensional array of
- * characters, one for each pixel, with 0=black up to n=white, where
- * n=2^(bit depth)-1. Ask me for more details if you don't understand
- * this. */
-
-long qc_capture(struct qcam_device * q, char *buf, unsigned long len)
-{
- int i, j, k, yield;
- int bytes;
- int linestotrans, transperline;
- int divisor;
- int pixels_per_line;
- int pixels_read = 0;
- int got=0;
- char buffer[6];
- int shift=8-q->bpp;
- char invert;
-
- if (q->mode == -1)
- return -ENXIO;
-
- qc_command(q, 0x7);
- qc_command(q, q->mode);
-
- if ((q->port_mode & QC_MODE_MASK) == QC_BIDIR)
- {
- write_lpcontrol(q, 0x2e); /* turn port around */
- write_lpcontrol(q, 0x26);
- (void) qc_waithand(q, 1);
- write_lpcontrol(q, 0x2e);
- (void) qc_waithand(q, 0);
- }
-
- /* strange -- should be 15:63 below, but 4bpp is odd */
- invert = (q->bpp == 4) ? 16 : 63;
-
- linestotrans = q->height / q->transfer_scale;
- pixels_per_line = q->width / q->transfer_scale;
- transperline = q->width * q->bpp;
- divisor = (((q->port_mode & QC_MODE_MASK) == QC_BIDIR) ? 24 : 8) *
- q->transfer_scale;
- transperline = (transperline + divisor - 1) / divisor;
-
- for (i = 0, yield = yieldlines; i < linestotrans; i++)
- {
- for (pixels_read = j = 0; j < transperline; j++)
- {
- bytes = qc_readbytes(q, buffer);
- for (k = 0; k < bytes && (pixels_read + k) < pixels_per_line; k++)
- {
- int o;
- if (buffer[k] == 0 && invert == 16)
- {
- /* 4bpp is odd (again) -- inverter is 16, not 15, but output
- must be 0-15 -- bls */
- buffer[k] = 16;
- }
- o=i*pixels_per_line + pixels_read + k;
- if(o<len)
- {
- got++;
- put_user((invert - buffer[k])<<shift, buf+o);
- }
- }
- pixels_read += bytes;
- }
- (void) qc_readbytes(q, 0); /* reset state machine */
-
- /* Grabbing an entire frame from the quickcam is a lengthy
- process. We don't (usually) want to busy-block the
- processor for the entire frame. yieldlines is a module
- parameter. If we yield every line, the minimum frame
- time will be 240 / 200 = 1.2 seconds. The compile-time
- default is to yield every 4 lines. */
- if (i >= yield) {
- current->state=TASK_INTERRUPTIBLE;
- schedule_timeout(HZ/200);
- yield = i + yieldlines;
- }
- }
-
- if ((q->port_mode & QC_MODE_MASK) == QC_BIDIR)
- {
- write_lpcontrol(q, 2);
- write_lpcontrol(q, 6);
- udelay(3);
- write_lpcontrol(q, 0xe);
- }
- if(got<len)
- return got;
- return len;
-}
-
-/*
- * Video4linux interfacing
- */
-
-static int qcam_open(struct video_device *dev, int flags)
-{
- MOD_INC_USE_COUNT;
- return 0;
-}
-
-static void qcam_close(struct video_device *dev)
-{
- MOD_DEC_USE_COUNT;
-}
-
-static int qcam_init_done(struct video_device *dev)
-{
- return 0;
-}
-
-static long qcam_write(struct video_device *v, const char *buf, unsigned long count, int noblock)
-{
- return -EINVAL;
-}
-
-static int qcam_ioctl(struct video_device *dev, unsigned int cmd, void *arg)
-{
- struct qcam_device *qcam=(struct qcam_device *)dev;
-
- switch(cmd)
- {
- case VIDIOCGCAP:
- {
- struct video_capability b;
- strcpy(b.name, "Quickcam");
- b.type = VID_TYPE_CAPTURE|VID_TYPE_SCALES|VID_TYPE_MONOCHROME;
- b.channels = 1;
- b.audios = 0;
- b.maxwidth = 320;
- b.maxheight = 240;
- b.minwidth = 80;
- b.minheight = 60;
- if(copy_to_user(arg, &b,sizeof(b)))
- return -EFAULT;
- return 0;
- }
- case VIDIOCGCHAN:
- {
- struct video_channel v;
- if(copy_from_user(&v, arg, sizeof(v)))
- return -EFAULT;
- if(v.channel!=0)
- return -EINVAL;
- v.flags=0;
- v.tuners=0;
- /* Good question.. its composite or SVHS so.. */
- v.type = VIDEO_TYPE_CAMERA;
- strcpy(v.name, "Camera");
- if(copy_to_user(arg, &v, sizeof(v)))
- return -EFAULT;
- return 0;
- }
- case VIDIOCSCHAN:
- {
- int v;
- if(copy_from_user(&v, arg,sizeof(v)))
- return -EFAULT;
- if(v!=0)
- return -EINVAL;
- return 0;
- }
- case VIDIOCGTUNER:
- {
- struct video_tuner v;
- if(copy_from_user(&v, arg, sizeof(v))!=0)
- return -EFAULT;
- if(v.tuner)
- return -EINVAL;
- strcpy(v.name, "Format");
- v.rangelow=0;
- v.rangehigh=0;
- v.flags= 0;
- v.mode = VIDEO_MODE_AUTO;
- if(copy_to_user(arg,&v,sizeof(v))!=0)
- return -EFAULT;
- return 0;
- }
- case VIDIOCSTUNER:
- {
- struct video_tuner v;
- if(copy_from_user(&v, arg, sizeof(v))!=0)
- return -EFAULT;
- if(v.tuner)
- return -EINVAL;
- if(v.mode!=VIDEO_MODE_AUTO)
- return -EINVAL;
- return 0;
- }
- case VIDIOCGPICT:
- {
- struct video_picture p;
- p.colour=0x8000;
- p.hue=0x8000;
- p.brightness=qcam->brightness<<8;
- p.contrast=qcam->contrast<<8;
- p.whiteness=qcam->whitebal<<8;
- p.depth=qcam->bpp;
- p.palette=VIDEO_PALETTE_GREY;
- if(copy_to_user(arg, &p, sizeof(p)))
- return -EFAULT;
- return 0;
- }
- case VIDIOCSPICT:
- {
- struct video_picture p;
- if(copy_from_user(&p, arg, sizeof(p)))
- return -EFAULT;
- if(p.palette!=VIDEO_PALETTE_GREY)
- return -EINVAL;
- if(p.depth!=4 && p.depth!=6)
- return -EINVAL;
-
- /*
- * Now load the camera.
- */
-
- qcam->brightness = p.brightness>>8;
- qcam->contrast = p.contrast>>8;
- qcam->whitebal = p.whiteness>>8;
- qcam->bpp = p.depth;
-
- down(&qcam->lock);
- qc_setscanmode(qcam);
- up(&qcam->lock);
- qcam->status |= QC_PARAM_CHANGE;
-
- return 0;
- }
- case VIDIOCSWIN:
- {
- struct video_window vw;
- if(copy_from_user(&vw, arg,sizeof(vw)))
- return -EFAULT;
- if(vw.flags)
- return -EINVAL;
- if(vw.clipcount)
- return -EINVAL;
- if(vw.height<60||vw.height>240)
- return -EINVAL;
- if(vw.width<80||vw.width>320)
- return -EINVAL;
-
- qcam->width = 320;
- qcam->height = 240;
- qcam->transfer_scale = 4;
-
- if(vw.width>=160 && vw.height>=120)
- {
- qcam->transfer_scale = 2;
- }
- if(vw.width>=320 && vw.height>=240)
- {
- qcam->width = 320;
- qcam->height = 240;
- qcam->transfer_scale = 1;
- }
- down(&qcam->lock);
- qc_setscanmode(qcam);
- up(&qcam->lock);
-
- /* We must update the camera before we grab. We could
- just have changed the grab size */
- qcam->status |= QC_PARAM_CHANGE;
-
- /* Ok we figured out what to use from our wide choice */
- return 0;
- }
- case VIDIOCGWIN:
- {
- struct video_window vw;
- vw.x=0;
- vw.y=0;
- vw.width=qcam->width/qcam->transfer_scale;
- vw.height=qcam->height/qcam->transfer_scale;
- vw.chromakey=0;
- vw.flags=0;
- if(copy_to_user(arg, &vw, sizeof(vw)))
- return -EFAULT;
- return 0;
- }
- case VIDIOCCAPTURE:
- return -EINVAL;
- case VIDIOCGFBUF:
- return -EINVAL;
- case VIDIOCSFBUF:
- return -EINVAL;
- case VIDIOCKEY:
- return 0;
- case VIDIOCGFREQ:
- return -EINVAL;
- case VIDIOCSFREQ:
- return -EINVAL;
- case VIDIOCGAUDIO:
- return -EINVAL;
- case VIDIOCSAUDIO:
- return -EINVAL;
- default:
- return -ENOIOCTLCMD;
- }
- return 0;
-}
-
-static long qcam_read(struct video_device *v, char *buf, unsigned long count, int noblock)
-{
- struct qcam_device *qcam=(struct qcam_device *)v;
- int len;
- parport_claim_or_block(qcam->pdev);
-
- down(&qcam->lock);
-
- qc_reset(qcam);
-
- /* Update the camera parameters if we need to */
- if (qcam->status & QC_PARAM_CHANGE)
- qc_set(qcam);
-
- len=qc_capture(qcam, buf,count);
-
- up(&qcam->lock);
-
- parport_release(qcam->pdev);
- return len;
-}
-
-static struct video_device qcam_template=
-{
- "Connectix Quickcam",
- VID_TYPE_CAPTURE,
- VID_HARDWARE_QCAM_BW,
- qcam_open,
- qcam_close,
- qcam_read,
- qcam_write,
- NULL,
- qcam_ioctl,
- NULL,
- qcam_init_done,
- NULL,
- 0,
- 0
-};
-
-#define MAX_CAMS 4
-static struct qcam_device *qcams[MAX_CAMS];
-static unsigned int num_cams = 0;
-
-int init_bwqcam(struct parport *port)
-{
- struct qcam_device *qcam;
-
- if (num_cams == MAX_CAMS)
- {
- printk(KERN_ERR "Too many Quickcams (max %d)\n", MAX_CAMS);
- return -ENOSPC;
- }
-
- qcam=qcam_init(port);
- if(qcam==NULL)
- return -ENODEV;
-
- parport_claim_or_block(qcam->pdev);
-
- qc_reset(qcam);
-
- if(qc_detect(qcam)==0)
- {
- parport_release(qcam->pdev);
- parport_unregister_device(qcam->pdev);
- kfree(qcam);
- return -ENODEV;
- }
- qc_calibrate(qcam);
-
- parport_release(qcam->pdev);
-
- printk(KERN_INFO "Connectix Quickcam on %s\n", qcam->pport->name);
-
- if(video_register_device(&qcam->vdev, VFL_TYPE_GRABBER)==-1)
- {
- parport_unregister_device(qcam->pdev);
- kfree(qcam);
- return -ENODEV;
- }
-
- qcams[num_cams++] = qcam;
-
- return 0;
-}
-
-void close_bwqcam(struct qcam_device *qcam)
-{
- video_unregister_device(&qcam->vdev);
- parport_unregister_device(qcam->pdev);
- kfree(qcam);
-}
-
-/* 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> */
-#ifdef MODULE
-static char *parport[MAX_CAMS] = { NULL, };
-MODULE_PARM(parport, "1-" __MODULE_STRING(MAX_CAMS) "s");
-#endif
-
-#ifdef MODULE
-int init_module(void)
-{
- struct parport *port;
- int n;
- if(parport[0] && strncmp(parport[0], "auto", 4)){
- /* user gave parport parameters */
- for(n=0; parport[n] && n<MAX_CAMS; n++){
- char *ep;
- unsigned long r;
- r = simple_strtoul(parport[n], &ep, 0);
- if(ep == parport[n]){
- printk(KERN_ERR
- "bw-qcam: bad port specifier \"%s\"\n",
- parport[n]);
- continue;
- }
- for (port=parport_enumerate(); port; port=port->next){
- if(r!=port->number)
- continue;
- init_bwqcam(port);
- break;
- }
- }
- return (num_cams)?0:-ENODEV;
- }
- /* no parameter or "auto" */
- for (port = parport_enumerate(); port; port=port->next)
- init_bwqcam(port);
-
- /* Do some sanity checks on the module parameters. */
- if (maxpoll > 5000) {
- printk("Connectix Quickcam max-poll was above 5000. Using 5000.\n");
- maxpoll = 5000;
- }
-
- if (yieldlines < 1) {
- printk("Connectix Quickcam yieldlines was less than 1. Using 1.\n");
- yieldlines = 1;
- }
-
- return (num_cams)?0:-ENODEV;
-}
-
-void cleanup_module(void)
-{
- unsigned int i;
- for (i = 0; i < num_cams; i++)
- close_bwqcam(qcams[i]);
-}
-#else
-int __init init_bw_qcams(struct video_init *unused)
-{
- struct parport *port;
-
- for (port = parport_enumerate(); port; port=port->next)
- init_bwqcam(port);
- return 0;
-}
-#endif
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)