diff options
Diffstat (limited to 'drivers/media/parport/bw-qcam.c')
| -rw-r--r-- | drivers/media/parport/bw-qcam.c | 1177 |
1 files changed, 0 insertions, 1177 deletions
diff --git a/drivers/media/parport/bw-qcam.c b/drivers/media/parport/bw-qcam.c deleted file mode 100644 index 67b9da1dc43f..000000000000 --- a/drivers/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"); |