/*
Winbond w9966cf Webcam parport driver.
- Version 0.32
+ Version 0.33
Copyright (C) 2001 Jakob Kemi <jakob.kemi@post.utfors.se>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/delay.h>
-#include <linux/videodev.h>
+#include <linux/version.h>
+#include <linux/videodev2.h>
#include <linux/slab.h>
#include <media/v4l2-common.h>
#include <media/v4l2-ioctl.h>
+#include <media/v4l2-device.h>
#include <linux/parport.h>
/*#define DEBUG*/ /* Undef me for production */
#define W9966_I2C_W_DATA 0x02
#define W9966_I2C_W_CLOCK 0x01
-struct w9966_dev {
+struct w9966 {
+ struct v4l2_device v4l2_dev;
unsigned char dev_state;
unsigned char i2c_state;
unsigned short ppmode;
signed char contrast;
signed char color;
signed char hue;
- unsigned long in_use;
+ struct mutex lock;
};
/*
static int video_nr = -1;
module_param(video_nr, int, 0);
-static struct w9966_dev w9966_cams[W9966_MAXCAMS];
+static struct w9966 w9966_cams[W9966_MAXCAMS];
/*
* Private function defines
/* Set camera phase flags, so we know what to uninit when terminating */
-static inline void w9966_set_state(struct w9966_dev *cam, int mask, int val)
+static inline void w9966_set_state(struct w9966 *cam, int mask, int val)
{
cam->dev_state = (cam->dev_state & ~mask) ^ val;
}
/* Get camera phase flags */
-static inline int w9966_get_state(struct w9966_dev *cam, int mask, int val)
+static inline int w9966_get_state(struct w9966 *cam, int mask, int val)
{
return ((cam->dev_state & mask) == val);
}
/* Claim parport for ourself */
-static void w9966_pdev_claim(struct w9966_dev *cam)
+static void w9966_pdev_claim(struct w9966 *cam)
{
if (w9966_get_state(cam, W9966_STATE_CLAIMED, W9966_STATE_CLAIMED))
return;
}
/* Release parport for others to use */
-static void w9966_pdev_release(struct w9966_dev *cam)
+static void w9966_pdev_release(struct w9966 *cam)
{
if (w9966_get_state(cam, W9966_STATE_CLAIMED, 0))
return;
/* Read register from W9966 interface-chip
Expects a claimed pdev
-1 on error, else register data (byte) */
-static int w9966_read_reg(struct w9966_dev *cam, int reg)
+static int w9966_read_reg(struct w9966 *cam, int reg)
{
/* ECP, read, regtransfer, REG, REG, REG, REG, REG */
const unsigned char addr = 0x80 | (reg & 0x1f);
/* Write register to W9966 interface-chip
Expects a claimed pdev
-1 on error */
-static int w9966_write_reg(struct w9966_dev *cam, int reg, int data)
+static int w9966_write_reg(struct w9966 *cam, int reg, int data)
{
/* ECP, write, regtransfer, REG, REG, REG, REG, REG */
const unsigned char addr = 0xc0 | (reg & 0x1f);
/* Sets the data line on the i2c bus.
Expects a claimed pdev. */
-static void w9966_i2c_setsda(struct w9966_dev *cam, int state)
+static void w9966_i2c_setsda(struct w9966 *cam, int state)
{
if (state)
cam->i2c_state |= W9966_I2C_W_DATA;
/* Get peripheral clock line
Expects a claimed pdev. */
-static int w9966_i2c_getscl(struct w9966_dev *cam)
+static int w9966_i2c_getscl(struct w9966 *cam)
{
const unsigned char state = w9966_read_reg(cam, 0x18);
return ((state & W9966_I2C_R_CLOCK) > 0);
/* Sets the clock line on the i2c bus.
Expects a claimed pdev. -1 on error */
-static int w9966_i2c_setscl(struct w9966_dev *cam, int state)
+static int w9966_i2c_setscl(struct w9966 *cam, int state)
{
unsigned long timeout;
#if 0
/* Get peripheral data line
Expects a claimed pdev. */
-static int w9966_i2c_getsda(struct w9966_dev *cam)
+static int w9966_i2c_getsda(struct w9966 *cam)
{
const unsigned char state = w9966_read_reg(cam, 0x18);
return ((state & W9966_I2C_R_DATA) > 0);
/* Write a byte with ack to the i2c bus.
Expects a claimed pdev. -1 on error */
-static int w9966_i2c_wbyte(struct w9966_dev *cam, int data)
+static int w9966_i2c_wbyte(struct w9966 *cam, int data)
{
int i;
/* Read a data byte with ack from the i2c-bus
Expects a claimed pdev. -1 on error */
#if 0
-static int w9966_i2c_rbyte(struct w9966_dev *cam)
+static int w9966_i2c_rbyte(struct w9966 *cam)
{
unsigned char data = 0x00;
int i;
/* Read a register from the i2c device.
Expects claimed pdev. -1 on error */
#if 0
-static int w9966_read_reg_i2c(struct w9966_dev *cam, int reg)
+static int w9966_read_reg_i2c(struct w9966 *cam, int reg)
{
int data;
/* Write a register to the i2c device.
Expects claimed pdev. -1 on error */
-static int w9966_write_reg_i2c(struct w9966_dev *cam, int reg, int data)
+static int w9966_write_reg_i2c(struct w9966 *cam, int reg, int data)
{
w9966_i2c_setsda(cam, 0);
w9966_i2c_setscl(cam, 0);
/* Setup the cameras capture window etc.
Expects a claimed pdev
return -1 on error */
-static int w9966_setup(struct w9966_dev *cam, int x1, int y1, int x2, int y2, int w, int h)
+static int w9966_setup(struct w9966 *cam, int x1, int y1, int x2, int y2, int w, int h)
{
unsigned int i;
unsigned int enh_s, enh_e;
* Video4linux interfacing
*/
-static long w9966_v4l_do_ioctl(struct file *file, unsigned int cmd, void *arg)
-{
- struct w9966_dev *cam = video_drvdata(file);
-
- switch (cmd) {
- case VIDIOCGCAP:
- {
- static struct video_capability vcap = {
- .name = W9966_DRIVERNAME,
- .type = VID_TYPE_CAPTURE | VID_TYPE_SCALES,
- .channels = 1,
- .maxwidth = W9966_WND_MAX_W,
- .maxheight = W9966_WND_MAX_H,
- .minwidth = 2,
- .minheight = 1,
- };
- struct video_capability *cap = arg;
- *cap = vcap;
- return 0;
- }
- case VIDIOCGCHAN:
- {
- struct video_channel *vch = arg;
- if (vch->channel != 0) /* We only support one channel (#0) */
- return -EINVAL;
- memset(vch, 0, sizeof(*vch));
- strcpy(vch->name, "CCD-input");
- vch->type = VIDEO_TYPE_CAMERA;
- return 0;
- }
- case VIDIOCSCHAN:
- {
- struct video_channel *vch = arg;
- if (vch->channel != 0)
- return -EINVAL;
- return 0;
- }
- case VIDIOCGTUNER:
- {
- struct video_tuner *vtune = arg;
- if (vtune->tuner != 0)
- return -EINVAL;
- strcpy(vtune->name, "no tuner");
- vtune->rangelow = 0;
- vtune->rangehigh = 0;
- vtune->flags = VIDEO_TUNER_NORM;
- vtune->mode = VIDEO_MODE_AUTO;
- vtune->signal = 0xffff;
- return 0;
- }
- case VIDIOCSTUNER:
- {
- struct video_tuner *vtune = arg;
- if (vtune->tuner != 0)
- return -EINVAL;
- if (vtune->mode != VIDEO_MODE_AUTO)
- return -EINVAL;
- return 0;
- }
- case VIDIOCGPICT:
- {
- struct video_picture vpic = {
- cam->brightness << 8, /* brightness */
- (cam->hue + 128) << 8, /* hue */
- cam->color << 9, /* color */
- cam->contrast << 9, /* contrast */
- 0x8000, /* whiteness */
- 16, VIDEO_PALETTE_YUV422/* bpp, palette format */
- };
- struct video_picture *pic = arg;
- *pic = vpic;
- return 0;
- }
- case VIDIOCSPICT:
- {
- struct video_picture *vpic = arg;
- if (vpic->depth != 16 || (vpic->palette != VIDEO_PALETTE_YUV422 && vpic->palette != VIDEO_PALETTE_YUYV))
- return -EINVAL;
-
- cam->brightness = vpic->brightness >> 8;
- cam->hue = (vpic->hue >> 8) - 128;
- cam->color = vpic->colour >> 9;
- cam->contrast = vpic->contrast >> 9;
-
- w9966_pdev_claim(cam);
-
- if (
- w9966_write_reg_i2c(cam, 0x0a, cam->brightness) == -1 ||
- w9966_write_reg_i2c(cam, 0x0b, cam->contrast) == -1 ||
- w9966_write_reg_i2c(cam, 0x0c, cam->color) == -1 ||
- w9966_write_reg_i2c(cam, 0x0d, cam->hue) == -1
- ) {
- w9966_pdev_release(cam);
- return -EIO;
- }
-
- w9966_pdev_release(cam);
- return 0;
- }
- case VIDIOCSWIN:
- {
- int ret;
- struct video_window *vwin = arg;
-
- if (vwin->flags != 0)
- return -EINVAL;
- if (vwin->clipcount != 0)
- return -EINVAL;
- if (vwin->width < 2 || vwin->width > W9966_WND_MAX_W)
- return -EINVAL;
- if (vwin->height < 1 || vwin->height > W9966_WND_MAX_H)
- return -EINVAL;
-
- /* Update camera regs */
- w9966_pdev_claim(cam);
- ret = w9966_setup(cam, 0, 0, 1023, 1023, vwin->width, vwin->height);
- w9966_pdev_release(cam);
-
- if (ret != 0) {
- DPRINTF("VIDIOCSWIN: w9966_setup() failed.\n");
- return -EIO;
- }
-
- return 0;
- }
- case VIDIOCGWIN:
- {
- struct video_window *vwin = arg;
- memset(vwin, 0, sizeof(*vwin));
- vwin->width = cam->width;
- vwin->height = cam->height;
- return 0;
- }
- /* Unimplemented */
- case VIDIOCCAPTURE:
- case VIDIOCGFBUF:
- case VIDIOCSFBUF:
- case VIDIOCKEY:
- case VIDIOCGFREQ:
- case VIDIOCSFREQ:
- case VIDIOCGAUDIO:
- case VIDIOCSAUDIO:
+static int cam_querycap(struct file *file, void *priv,
+ struct v4l2_capability *vcap)
+{
+ struct w9966 *cam = video_drvdata(file);
+
+ strlcpy(vcap->driver, cam->v4l2_dev.name, sizeof(vcap->driver));
+ strlcpy(vcap->card, W9966_DRIVERNAME, sizeof(vcap->card));
+ strlcpy(vcap->bus_info, "parport", sizeof(vcap->bus_info));
+ vcap->version = KERNEL_VERSION(0, 33, 0);
+ vcap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE;
+ return 0;
+}
+
+static int cam_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 cam_g_input(struct file *file, void *fh, unsigned int *inp)
+{
+ *inp = 0;
+ return 0;
+}
+
+static int cam_s_input(struct file *file, void *fh, unsigned int inp)
+{
+ return (inp > 0) ? -EINVAL : 0;
+}
+
+static int cam_queryctrl(struct file *file, void *priv,
+ struct v4l2_queryctrl *qc)
+{
+ switch (qc->id) {
+ case V4L2_CID_BRIGHTNESS:
+ return v4l2_ctrl_query_fill(qc, 0, 255, 1, 128);
+ case V4L2_CID_CONTRAST:
+ return v4l2_ctrl_query_fill(qc, -64, 64, 1, 64);
+ case V4L2_CID_SATURATION:
+ return v4l2_ctrl_query_fill(qc, -64, 64, 1, 64);
+ case V4L2_CID_HUE:
+ return v4l2_ctrl_query_fill(qc, -128, 127, 1, 0);
+ }
+ return -EINVAL;
+}
+
+static int cam_g_ctrl(struct file *file, void *priv,
+ struct v4l2_control *ctrl)
+{
+ struct w9966 *cam = video_drvdata(file);
+ int ret = 0;
+
+ switch (ctrl->id) {
+ case V4L2_CID_BRIGHTNESS:
+ ctrl->value = cam->brightness;
+ break;
+ case V4L2_CID_CONTRAST:
+ ctrl->value = cam->contrast;
+ break;
+ case V4L2_CID_SATURATION:
+ ctrl->value = cam->color;
+ break;
+ case V4L2_CID_HUE:
+ ctrl->value = cam->hue;
+ break;
default:
- return -ENOIOCTLCMD;
+ ret = -EINVAL;
+ break;
}
+ return ret;
+}
+
+static int cam_s_ctrl(struct file *file, void *priv,
+ struct v4l2_control *ctrl)
+{
+ struct w9966 *cam = video_drvdata(file);
+ int ret = 0;
+
+ mutex_lock(&cam->lock);
+ switch (ctrl->id) {
+ case V4L2_CID_BRIGHTNESS:
+ cam->brightness = ctrl->value;
+ break;
+ case V4L2_CID_CONTRAST:
+ cam->contrast = ctrl->value;
+ break;
+ case V4L2_CID_SATURATION:
+ cam->color = ctrl->value;
+ break;
+ case V4L2_CID_HUE:
+ cam->hue = ctrl->value;
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ if (ret == 0) {
+ w9966_pdev_claim(cam);
+
+ if (w9966_write_reg_i2c(cam, 0x0a, cam->brightness) == -1 ||
+ w9966_write_reg_i2c(cam, 0x0b, cam->contrast) == -1 ||
+ w9966_write_reg_i2c(cam, 0x0c, cam->color) == -1 ||
+ w9966_write_reg_i2c(cam, 0x0d, cam->hue) == -1) {
+ ret = -EIO;
+ }
+
+ w9966_pdev_release(cam);
+ }
+ mutex_unlock(&cam->lock);
+ return ret;
+}
+
+static int cam_g_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt)
+{
+ struct w9966 *cam = video_drvdata(file);
+ struct v4l2_pix_format *pix = &fmt->fmt.pix;
+
+ pix->width = cam->width;
+ pix->height = cam->height;
+ pix->pixelformat = V4L2_PIX_FMT_YUYV;
+ pix->field = V4L2_FIELD_NONE;
+ pix->bytesperline = 2 * cam->width;
+ pix->sizeimage = 2 * cam->width * cam->height;
+ /* Just a guess */
+ pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
return 0;
}
-static long w9966_v4l_ioctl(struct file *file,
- unsigned int cmd, unsigned long arg)
+static int cam_try_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt)
{
- return video_usercopy(file, cmd, arg, w9966_v4l_do_ioctl);
+ struct v4l2_pix_format *pix = &fmt->fmt.pix;
+
+ if (pix->width < 2)
+ pix->width = 2;
+ if (pix->height < 1)
+ pix->height = 1;
+ if (pix->width > W9966_WND_MAX_W)
+ pix->width = W9966_WND_MAX_W;
+ if (pix->height > W9966_WND_MAX_H)
+ pix->height = W9966_WND_MAX_H;
+ pix->pixelformat = V4L2_PIX_FMT_YUYV;
+ pix->field = V4L2_FIELD_NONE;
+ pix->bytesperline = 2 * pix->width;
+ pix->sizeimage = 2 * pix->width * pix->height;
+ /* Just a guess */
+ pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
+ return 0;
+}
+
+static int cam_s_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt)
+{
+ struct w9966 *cam = video_drvdata(file);
+ struct v4l2_pix_format *pix = &fmt->fmt.pix;
+ int ret = cam_try_fmt_vid_cap(file, fh, fmt);
+
+ if (ret)
+ return ret;
+
+ mutex_lock(&cam->lock);
+ /* Update camera regs */
+ w9966_pdev_claim(cam);
+ ret = w9966_setup(cam, 0, 0, 1023, 1023, pix->width, pix->height);
+ w9966_pdev_release(cam);
+ mutex_unlock(&cam->lock);
+ return ret;
+}
+
+static int cam_enum_fmt_vid_cap(struct file *file, void *fh, struct v4l2_fmtdesc *fmt)
+{
+ static struct v4l2_fmtdesc formats[] = {
+ { 0, 0, 0,
+ "YUV 4:2:2", V4L2_PIX_FMT_YUYV,
+ { 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;
}
/* Capture data */
static ssize_t w9966_v4l_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
- struct w9966_dev *cam = video_drvdata(file);
+ struct w9966 *cam = video_drvdata(file);
unsigned char addr = 0xa0; /* ECP, read, CCD-transfer, 00000 */
unsigned char __user *dest = (unsigned char __user *)buf;
unsigned long dleft = count;
if (count > cam->width * cam->height * 2)
return -EINVAL;
+ mutex_lock(&cam->lock);
w9966_pdev_claim(cam);
w9966_write_reg(cam, 0x00, 0x02); /* Reset ECP-FIFO buffer */
w9966_write_reg(cam, 0x00, 0x00); /* Return to normal operation */
(parport_write(cam->pport, &addr, 1) != 1) ||
(parport_negotiate(cam->pport, cam->ppmode|IEEE1284_DATA) != 0)) {
w9966_pdev_release(cam);
+ mutex_unlock(&cam->lock);
return -EFAULT;
}
out:
kfree(tbuf);
w9966_pdev_release(cam);
+ mutex_unlock(&cam->lock);
return count;
}
-static int w9966_exclusive_open(struct file *file)
-{
- struct w9966_dev *cam = video_drvdata(file);
-
- return test_and_set_bit(0, &cam->in_use) ? -EBUSY : 0;
-}
-
-static int w9966_exclusive_release(struct file *file)
-{
- struct w9966_dev *cam = video_drvdata(file);
-
- clear_bit(0, &cam->in_use);
- return 0;
-}
-
static const struct v4l2_file_operations w9966_fops = {
.owner = THIS_MODULE,
- .open = w9966_exclusive_open,
- .release = w9966_exclusive_release,
- .ioctl = w9966_v4l_ioctl,
+ .ioctl = video_ioctl2,
.read = w9966_v4l_read,
};
-static struct video_device w9966_template = {
- .name = W9966_DRIVERNAME,
- .fops = &w9966_fops,
- .release = video_device_release_empty,
+static const struct v4l2_ioctl_ops w9966_ioctl_ops = {
+ .vidioc_querycap = cam_querycap,
+ .vidioc_g_input = cam_g_input,
+ .vidioc_s_input = cam_s_input,
+ .vidioc_enum_input = cam_enum_input,
+ .vidioc_queryctrl = cam_queryctrl,
+ .vidioc_g_ctrl = cam_g_ctrl,
+ .vidioc_s_ctrl = cam_s_ctrl,
+ .vidioc_enum_fmt_vid_cap = cam_enum_fmt_vid_cap,
+ .vidioc_g_fmt_vid_cap = cam_g_fmt_vid_cap,
+ .vidioc_s_fmt_vid_cap = cam_s_fmt_vid_cap,
+ .vidioc_try_fmt_vid_cap = cam_try_fmt_vid_cap,
};
default video mode, setup ccd-chip, register v4l device etc..
Also used for 'probing' of hardware.
-1 on error */
-static int w9966_init(struct w9966_dev *cam, struct parport* port)
+static int w9966_init(struct w9966 *cam, struct parport *port)
{
+ struct v4l2_device *v4l2_dev = &cam->v4l2_dev;
+
if (cam->dev_state != 0)
return -1;
+ strlcpy(v4l2_dev->name, "w9966", sizeof(v4l2_dev->name));
+
+ if (v4l2_device_register(NULL, v4l2_dev) < 0) {
+ v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
+ return -1;
+ }
cam->pport = port;
cam->brightness = 128;
cam->contrast = 64;
w9966_pdev_release(cam);
/* Fill in the video_device struct and register us to v4l */
- memcpy(&cam->vdev, &w9966_template, sizeof(struct video_device));
+ strlcpy(cam->vdev.name, W9966_DRIVERNAME, sizeof(cam->vdev.name));
+ cam->vdev.v4l2_dev = v4l2_dev;
+ cam->vdev.fops = &w9966_fops;
+ cam->vdev.ioctl_ops = &w9966_ioctl_ops;
+ cam->vdev.release = video_device_release_empty;
video_set_drvdata(&cam->vdev, cam);
+ mutex_init(&cam->lock);
+
if (video_register_device(&cam->vdev, VFL_TYPE_GRABBER, video_nr) < 0)
return -1;
w9966_set_state(cam, W9966_STATE_VDEV, W9966_STATE_VDEV);
/* All ok */
- printk(KERN_INFO "w9966cf: Found and initialized a webcam on %s.\n",
+ v4l2_info(v4l2_dev, "Found and initialized a webcam on %s.\n",
cam->pport->name);
return 0;
}
/* Terminate everything gracefully */
-static void w9966_term(struct w9966_dev *cam)
+static void w9966_term(struct w9966 *cam)
{
/* Unregister from v4l */
if (w9966_get_state(cam, W9966_STATE_VDEV, W9966_STATE_VDEV)) {
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