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-rw-r--r--drivers/staging/media/parport/bw-qcam.c1177
1 files changed, 0 insertions, 1177 deletions
diff --git a/drivers/staging/media/parport/bw-qcam.c b/drivers/staging/media/parport/bw-qcam.c
deleted file mode 100644
index 67b9da1dc43f..000000000000
--- a/drivers/staging/media/parport/bw-qcam.c
+++ /dev/null
@@ -1,1177 +0,0 @@
-/*
- * QuickCam Driver For Video4Linux.
- *
- * 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/kernel.h>
-#include <linux/slab.h>
-#include <linux/mm.h>
-#include <linux/parport.h>
-#include <linux/sched.h>
-#include <linux/videodev2.h>
-#include <linux/mutex.h>
-#include <asm/uaccess.h>
-#include <media/v4l2-common.h>
-#include <media/v4l2-ioctl.h>
-#include <media/v4l2-device.h>
-#include <media/v4l2-fh.h>
-#include <media/v4l2-ctrls.h>
-#include <media/v4l2-event.h>
-#include <media/videobuf2-vmalloc.h>
-
-/* One from column A... */
-#define QC_NOTSET 0
-#define QC_UNIDIR 1
-#define QC_BIDIR 2
-#define QC_SERIAL 3
-
-/* ... and one from column B */
-#define QC_ANY 0x00
-#define QC_FORCE_UNIDIR 0x10
-#define QC_FORCE_BIDIR 0x20
-#define QC_FORCE_SERIAL 0x30
-/* in the port_mode member */
-
-#define QC_MODE_MASK 0x07
-#define QC_FORCE_MASK 0x70
-
-#define MAX_HEIGHT 243
-#define MAX_WIDTH 336
-
-/* Bit fields for status flags */
-#define QC_PARAM_CHANGE 0x01 /* Camera status change has occurred */
-
-struct qcam {
- struct v4l2_device v4l2_dev;
- struct video_device vdev;
- struct v4l2_ctrl_handler hdl;
- struct vb2_queue vb_vidq;
- struct pardevice *pdev;
- struct parport *pport;
- struct mutex lock;
- struct mutex queue_lock;
- int width, height;
- int bpp;
- int mode;
- int contrast, brightness, whitebal;
- int port_mode;
- int transfer_scale;
- int top, left;
- int status;
- unsigned int saved_bits;
- unsigned long in_use;
-};
-
-static unsigned int maxpoll = 250; /* Maximum busy-loop count for qcam I/O */
-static unsigned int yieldlines = 4; /* Yield after this many during capture */
-static int video_nr = -1;
-static unsigned int force_init; /* Whether to probe aggressively */
-
-module_param(maxpoll, int, 0);
-module_param(yieldlines, int, 0);
-module_param(video_nr, int, 0);
-
-/* Set force_init=1 to avoid detection by polling status register and
- * immediately attempt to initialize qcam */
-module_param(force_init, int, 0);
-
-#define MAX_CAMS 4
-static struct qcam *qcams[MAX_CAMS];
-static unsigned int num_cams;
-
-static inline int read_lpstatus(struct qcam *q)
-{
- return parport_read_status(q->pport);
-}
-
-static inline int read_lpdata(struct qcam *q)
-{
- return parport_read_data(q->pport);
-}
-
-static inline void write_lpdata(struct qcam *q, int d)
-{
- parport_write_data(q->pport, d);
-}
-
-static void write_lpcontrol(struct qcam *q, int d)
-{
- if (d & 0x20) {
- /* Set bidirectional mode to reverse (data in) */
- parport_data_reverse(q->pport);
- } else {
- /* Set bidirectional mode to forward (data out) */
- parport_data_forward(q->pport);
- }
-
- /* Now issue the regular port command, but strip out the
- * direction flag */
- d &= ~0x20;
- parport_write_control(q->pport, d);
-}
-
-
-/* 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 *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)
- msleep_interruptible(5);
- 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)
- msleep_interruptible(5);
- 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 *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)
- msleep_interruptible(5);
- if (runs++ > (maxpoll + 1000)) /* 5 seconds */
- return 0;
- } while ((status & 1) != val);
-
- return status;
-}
-
-/* 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 *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 *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;
-}
-
-
-/* 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 *q)
-{
- int reg, lastreg;
- int count = 0;
- int i;
-
- if (force_init)
- return 1;
-
- 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(KERN_DEBUG "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 > 20 && count < 400) {
- return 1; /* found */
- } else {
- printk(KERN_ERR "No Quickcam found on port %s\n",
- q->pport->name);
- printk(KERN_DEBUG "Quickcam detection counter: %u\n", count);
- return 0; /* not found */
- }
-}
-
-/* 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 *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. 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 *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 */
-}
-
-
-
-/* Reset the QuickCam and program for brightness, contrast,
- * white-balance, and resolution. */
-
-static void qc_set(struct qcam *q)
-{
- int val;
- int val2;
-
- /* 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 = DIV_ROUND_UP(val, 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. */
-
-static inline int qc_readbytes(struct qcam *q, char buffer[])
-{
- int ret = 1;
- unsigned int hi, lo;
- unsigned int hi2, lo2;
- static int state;
-
- 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. */
-
-static long qc_capture(struct qcam *q, u8 *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);
- qc_waithand(q, 1);
- write_lpcontrol(q, 0x2e);
- 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 = DIV_ROUND_UP(transperline, 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) {
- u8 ch = invert - buffer[k];
- got++;
- buf[o] = ch << shift;
- }
- }
- pixels_read += bytes;
- }
- qc_readbytes(q, NULL); /* 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) {
- msleep_interruptible(5);
- 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;
-}
-
-/* ------------------------------------------------------------------
- Videobuf operations
- ------------------------------------------------------------------*/
-static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
- unsigned int *nbuffers, unsigned int *nplanes,
- unsigned int sizes[], void *alloc_ctxs[])
-{
- struct qcam *dev = vb2_get_drv_priv(vq);
-
- if (0 == *nbuffers)
- *nbuffers = 3;
- *nplanes = 1;
- mutex_lock(&dev->lock);
- if (fmt)
- sizes[0] = fmt->fmt.pix.width * fmt->fmt.pix.height;
- else
- sizes[0] = (dev->width / dev->transfer_scale) *
- (dev->height / dev->transfer_scale);
- mutex_unlock(&dev->lock);
- return 0;
-}
-
-static void buffer_queue(struct vb2_buffer *vb)
-{
- vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
-}
-
-static void buffer_finish(struct vb2_buffer *vb)
-{
- struct qcam *qcam = vb2_get_drv_priv(vb->vb2_queue);
- void *vbuf = vb2_plane_vaddr(vb, 0);
- int size = vb->vb2_queue->plane_sizes[0];
- int len;
-
- if (!vb2_is_streaming(vb->vb2_queue))
- return;
-
- mutex_lock(&qcam->lock);
- parport_claim_or_block(qcam->pdev);
-
- qc_reset(qcam);
-
- /* Update the camera parameters if we need to */
- if (qcam->status & QC_PARAM_CHANGE)
- qc_set(qcam);
-
- len = qc_capture(qcam, vbuf, size);
-
- parport_release(qcam->pdev);
- mutex_unlock(&qcam->lock);
- v4l2_get_timestamp(&vb->v4l2_buf.timestamp);
- if (len != size)
- vb->state = VB2_BUF_STATE_ERROR;
- vb2_set_plane_payload(vb, 0, len);
-}
-
-static struct vb2_ops qcam_video_qops = {
- .queue_setup = queue_setup,
- .buf_queue = buffer_queue,
- .buf_finish = buffer_finish,
- .wait_prepare = vb2_ops_wait_prepare,
- .wait_finish = vb2_ops_wait_finish,
-};
-
-/*
- * 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, "Connectix B&W Quickcam", sizeof(vcap->card));
- strlcpy(vcap->bus_info, qcam->pport->name, sizeof(vcap->bus_info));
- vcap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
- V4L2_CAP_STREAMING;
- 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 / qcam->transfer_scale;
- pix->height = qcam->height / qcam->transfer_scale;
- pix->pixelformat = (qcam->bpp == 4) ? V4L2_PIX_FMT_Y4 : V4L2_PIX_FMT_Y6;
- pix->field = V4L2_FIELD_NONE;
- pix->bytesperline = pix->width;
- pix->sizeimage = pix->width * pix->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;
- }
- if (pix->pixelformat != V4L2_PIX_FMT_Y4 &&
- pix->pixelformat != V4L2_PIX_FMT_Y6)
- pix->pixelformat = V4L2_PIX_FMT_Y4;
- pix->field = V4L2_FIELD_NONE;
- pix->bytesperline = pix->width;
- pix->sizeimage = 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;
- if (vb2_is_busy(&qcam->vb_vidq))
- return -EBUSY;
- qcam->width = 320;
- qcam->height = 240;
- if (pix->height == 60)
- qcam->transfer_scale = 4;
- else if (pix->height == 120)
- qcam->transfer_scale = 2;
- else
- qcam->transfer_scale = 1;
- if (pix->pixelformat == V4L2_PIX_FMT_Y6)
- qcam->bpp = 6;
- else
- qcam->bpp = 4;
-
- qc_setscanmode(qcam);
- /* We must update the camera before we grab. We could
- just have changed the grab size */
- qcam->status |= QC_PARAM_CHANGE;
- 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,
- "4-Bit Monochrome", V4L2_PIX_FMT_Y4,
- { 0, 0, 0, 0 }
- },
- { 1, 0, 0,
- "6-Bit Monochrome", V4L2_PIX_FMT_Y6,
- { 0, 0, 0, 0 }
- },
- };
- enum v4l2_buf_type type = fmt->type;
-
- if (fmt->index > 1)
- return -EINVAL;
-
- *fmt = formats[fmt->index];
- fmt->type = type;
- return 0;
-}
-
-static int qcam_enum_framesizes(struct file *file, void *fh,
- struct v4l2_frmsizeenum *fsize)
-{
- static const struct v4l2_frmsize_discrete sizes[] = {
- { 80, 60 },
- { 160, 120 },
- { 320, 240 },
- };
-
- if (fsize->index > 2)
- return -EINVAL;
- if (fsize->pixel_format != V4L2_PIX_FMT_Y4 &&
- fsize->pixel_format != V4L2_PIX_FMT_Y6)
- return -EINVAL;
- fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
- fsize->discrete = sizes[fsize->index];
- return 0;
-}
-
-static int qcam_s_ctrl(struct v4l2_ctrl *ctrl)
-{
- struct qcam *qcam =
- container_of(ctrl->handler, struct qcam, hdl);
- int ret = 0;
-
- 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)
- qcam->status |= QC_PARAM_CHANGE;
- return ret;
-}
-
-static const struct v4l2_file_operations qcam_fops = {
- .owner = THIS_MODULE,
- .open = v4l2_fh_open,
- .release = vb2_fop_release,
- .poll = vb2_fop_poll,
- .unlocked_ioctl = video_ioctl2,
- .read = vb2_fop_read,
- .mmap = vb2_fop_mmap,
-};
-
-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_enum_framesizes = qcam_enum_framesizes,
- .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_reqbufs = vb2_ioctl_reqbufs,
- .vidioc_create_bufs = vb2_ioctl_create_bufs,
- .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
- .vidioc_querybuf = vb2_ioctl_querybuf,
- .vidioc_qbuf = vb2_ioctl_qbuf,
- .vidioc_dqbuf = vb2_ioctl_dqbuf,
- .vidioc_streamon = vb2_ioctl_streamon,
- .vidioc_streamoff = vb2_ioctl_streamoff,
- .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. This is where
- * defaults are set for people who don't have a config file.*/
-
-static struct qcam *qcam_init(struct parport *port)
-{
- struct qcam *qcam;
- struct v4l2_device *v4l2_dev;
- struct vb2_queue *q;
- int err;
-
- qcam = kzalloc(sizeof(struct qcam), GFP_KERNEL);
- if (qcam == NULL)
- return NULL;
-
- v4l2_dev = &qcam->v4l2_dev;
- snprintf(v4l2_dev->name, sizeof(v4l2_dev->name), "bw-qcam%u", num_cams);
-
- if (v4l2_device_register(port->dev, 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, 180);
- 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, 105);
- if (qcam->hdl.error) {
- v4l2_err(v4l2_dev, "couldn't register controls\n");
- goto exit;
- }
-
- mutex_init(&qcam->lock);
- mutex_init(&qcam->queue_lock);
-
- /* initialize queue */
- q = &qcam->vb_vidq;
- q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
- q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
- q->drv_priv = qcam;
- q->ops = &qcam_video_qops;
- q->mem_ops = &vb2_vmalloc_memops;
- q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
- err = vb2_queue_init(q);
- if (err < 0) {
- v4l2_err(v4l2_dev, "couldn't init vb2_queue for %s.\n", port->name);
- goto exit;
- }
- qcam->vdev.queue = q;
- qcam->vdev.queue->lock = &qcam->queue_lock;
-
- qcam->pport = port;
- qcam->pdev = parport_register_device(port, v4l2_dev->name, NULL, NULL,
- NULL, 0, NULL);
- if (qcam->pdev == NULL) {
- v4l2_err(v4l2_dev, "couldn't register for %s.\n", port->name);
- goto exit;
- }
-
- strlcpy(qcam->vdev.name, "Connectix QuickCam", sizeof(qcam->vdev.name));
- qcam->vdev.v4l2_dev = v4l2_dev;
- qcam->vdev.ctrl_handler = &qcam->hdl;
- qcam->vdev.fops = &qcam_fops;
- qcam->vdev.lock = &qcam->lock;
- qcam->vdev.ioctl_ops = &qcam_ioctl_ops;
- qcam->vdev.release = video_device_release_empty;
- video_set_drvdata(&qcam->vdev, qcam);
-
- qcam->port_mode = (QC_ANY | QC_NOTSET);
- qcam->width = 320;
- qcam->height = 240;
- qcam->bpp = 4;
- qcam->transfer_scale = 2;
- qcam->contrast = 192;
- qcam->brightness = 180;
- qcam->whitebal = 105;
- qcam->top = 1;
- qcam->left = 14;
- qcam->mode = -1;
- qcam->status = QC_PARAM_CHANGE;
- return qcam;
-
-exit:
- v4l2_ctrl_handler_free(&qcam->hdl);
- kfree(qcam);
- return NULL;
-}
-
-static int qc_calibrate(struct qcam *q)
-{
- /*
- * Bugfix by Hanno Mueller hmueller@kabel.de, Mai 21 96
- * The white balance is an individual 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;
-}
-
-static int init_bwqcam(struct parport *port)
-{
- struct qcam *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);
- v4l2_ctrl_handler_setup(&qcam->hdl);
-
- parport_release(qcam->pdev);
-
- v4l2_info(&qcam->v4l2_dev, "Connectix Quickcam on %s\n", qcam->pport->name);
-
- if (video_register_device(&qcam->vdev, VFL_TYPE_GRABBER, video_nr) < 0) {
- parport_unregister_device(qcam->pdev);
- kfree(qcam);
- return -ENODEV;
- }
-
- qcams[num_cams++] = qcam;
-
- return 0;
-}
-
-static void close_bwqcam(struct qcam *qcam)
-{
- video_unregister_device(&qcam->vdev);
- v4l2_ctrl_handler_free(&qcam->hdl);
- 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_param_array(parport, charp, NULL, 0);
-#endif
-
-static int accept_bwqcam(struct parport *port)
-{
-#ifdef MODULE
- int n;
-
- if (parport[0] && strncmp(parport[0], "auto", 4) != 0) {
- /* user gave parport parameters */
- for (n = 0; n < MAX_CAMS && parport[n]; 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;
- }
- if (r == port->number)
- return 1;
- }
- return 0;
- }
-#endif
- return 1;
-}
-
-static void bwqcam_attach(struct parport *port)
-{
- if (accept_bwqcam(port))
- init_bwqcam(port);
-}
-
-static void bwqcam_detach(struct parport *port)
-{
- int i;
- for (i = 0; i < num_cams; i++) {
- struct qcam *qcam = qcams[i];
- if (qcam && qcam->pdev->port == port) {
- qcams[i] = NULL;
- close_bwqcam(qcam);
- }
- }
-}
-
-static struct parport_driver bwqcam_driver = {
- .name = "bw-qcam",
- .attach = bwqcam_attach,
- .detach = bwqcam_detach,
-};
-
-static void __exit exit_bw_qcams(void)
-{
- parport_unregister_driver(&bwqcam_driver);
-}
-
-static int __init init_bw_qcams(void)
-{
-#ifdef MODULE
- /* Do some sanity checks on the module parameters. */
- if (maxpoll > 5000) {
- printk(KERN_INFO "Connectix Quickcam max-poll was above 5000. Using 5000.\n");
- maxpoll = 5000;
- }
-
- if (yieldlines < 1) {
- printk(KERN_INFO "Connectix Quickcam yieldlines was less than 1. Using 1.\n");
- yieldlines = 1;
- }
-#endif
- return parport_register_driver(&bwqcam_driver);
-}
-
-module_init(init_bw_qcams);
-module_exit(exit_bw_qcams);
-
-MODULE_LICENSE("GPL");
-MODULE_VERSION("0.0.3");

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