Skip to content

L
linux
Commit 271922c0 authored by Hans Verkuil's avatar Hans Verkuil Committed by Mauro Carvalho Chehab
Browse files
Options

V4L/DVB: w9966: reorganize the order of functions 

Get rid of completely unnecessary function prototypes.
Signed-off-by: default avatarHans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 46742267
Hide whitespace changes
Inline Side-by-side
Showing with 265 additions and 302 deletions
drivers/media/video/w9966.c
View file @ 271922c0
......@@ -144,76 +144,8 @@ MODULE_PARM_DESC(parmode, "parmode: transfer mode (0=auto, 1=ecp, 2=epp");
static int video_nr = -1;
module_param(video_nr, int, 0);
/*
* Private data
*/
static struct w9966_dev w9966_cams[W9966_MAXCAMS];
/*
* Private function declares
*/
static inline void w9966_setState(struct w9966_dev *cam, int mask, int val);
static inline int w9966_getState(struct w9966_dev *cam, int mask, int val);
static inline void w9966_pdev_claim(struct w9966_dev *vdev);
static inline void w9966_pdev_release(struct w9966_dev *vdev);
static int w9966_rReg(struct w9966_dev *cam, int reg);
static int w9966_wReg(struct w9966_dev *cam, int reg, int data);
#if 0
static int w9966_rReg_i2c(struct w9966_dev *cam, int reg);
#endif
static int w9966_wReg_i2c(struct w9966_dev *cam, int reg, int data);
static int w9966_findlen(int near, int size, int maxlen);
static int w9966_calcscale(int size, int min, int max, int *beg, int *end, unsigned char *factor);
static int w9966_setup(struct w9966_dev *cam, int x1, int y1, int x2, int y2, int w, int h);
static int w9966_init(struct w9966_dev *cam, struct parport* port);
static void w9966_term(struct w9966_dev *cam);
static inline void w9966_i2c_setsda(struct w9966_dev *cam, int state);
static inline int w9966_i2c_setscl(struct w9966_dev *cam, int state);
static inline int w9966_i2c_getsda(struct w9966_dev *cam);
static inline int w9966_i2c_getscl(struct w9966_dev *cam);
static int w9966_i2c_wbyte(struct w9966_dev *cam, int data);
#if 0
static int w9966_i2c_rbyte(struct w9966_dev *cam);
#endif
static long w9966_v4l_ioctl(struct file *file,
unsigned int cmd, unsigned long arg);
static ssize_t w9966_v4l_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos);
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,
.read = w9966_v4l_read,
};
static struct video_device w9966_template = {
.name = W9966_DRIVERNAME,
.fops = &w9966_fops,
.release = video_device_release_empty,
};
/*
* Private function defines
*/
......@@ -232,7 +164,7 @@ static inline int w9966_getState(struct w9966_dev *cam, int mask, int val)
}
/* Claim parport for ourself */
static inline void w9966_pdev_claim(struct w9966_dev *cam)
static void w9966_pdev_claim(struct w9966_dev *cam)
{
if (w9966_getState(cam, W9966_STATE_CLAIMED, W9966_STATE_CLAIMED))
return;
......@@ -241,7 +173,7 @@ static inline void w9966_pdev_claim(struct w9966_dev *cam)
}
/* Release parport for others to use */
static inline void w9966_pdev_release(struct w9966_dev *cam)
static void w9966_pdev_release(struct w9966_dev *cam)
{
if (w9966_getState(cam, W9966_STATE_CLAIMED, 0))
return;
......@@ -291,97 +223,168 @@ static int w9966_wReg(struct w9966_dev *cam, int reg, int data)
return 0;
}
/* Initialize camera device. Setup all internal flags, set a
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)
/*
* Ugly and primitive i2c protocol functions
*/
/* Sets the data line on the i2c bus.
Expects a claimed pdev. */
static void w9966_i2c_setsda(struct w9966_dev *cam, int state)
{
if (cam->dev_state != 0)
return -1;
if (state)
cam->i2c_state |= W9966_I2C_W_DATA;
else
cam->i2c_state &= ~W9966_I2C_W_DATA;
cam->pport = port;
cam->brightness = 128;
cam->contrast = 64;
cam->color = 64;
cam->hue = 0;
w9966_wReg(cam, 0x18, cam->i2c_state);
udelay(5);
}
/* Select requested transfer mode */
switch (parmode) {
default: /* Auto-detect (priority: hw-ecp, hw-epp, sw-ecp) */
case 0:
if (port->modes & PARPORT_MODE_ECP)
cam->ppmode = IEEE1284_MODE_ECP;
else if (port->modes & PARPORT_MODE_EPP)
cam->ppmode = IEEE1284_MODE_EPP;
else
cam->ppmode = IEEE1284_MODE_ECP;
break;
case 1: /* hw- or sw-ecp */
cam->ppmode = IEEE1284_MODE_ECP;
break;
case 2: /* hw- or sw-epp */
cam->ppmode = IEEE1284_MODE_EPP;
break;
/* Get peripheral clock line
Expects a claimed pdev. */
static int w9966_i2c_getscl(struct w9966_dev *cam)
{
const unsigned char state = w9966_rReg(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)
{
unsigned long timeout;
if (state)
cam->i2c_state |= W9966_I2C_W_CLOCK;
else
cam->i2c_state &= ~W9966_I2C_W_CLOCK;
w9966_wReg(cam, 0x18, cam->i2c_state);
udelay(5);
/* we go to high, we also expect the peripheral to ack. */
if (state) {
timeout = jiffies + 100;
while (!w9966_i2c_getscl(cam)) {
if (time_after(jiffies, timeout))
return -1;
}
}
return 0;
}
/* Tell the parport driver that we exists */
cam->pdev = parport_register_device(port, "w9966", NULL, NULL, NULL, 0, NULL);
if (cam->pdev == NULL) {
DPRINTF("parport_register_device() failed\n");
return -1;
#if 0
/* Get peripheral data line
Expects a claimed pdev. */
static int w9966_i2c_getsda(struct w9966_dev *cam)
{
const unsigned char state = w9966_rReg(cam, 0x18);
return ((state & W9966_I2C_R_DATA) > 0);
}
#endif
/* 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)
{
int i;
for (i = 7; i >= 0; i--) {
w9966_i2c_setsda(cam, (data >> i) & 0x01);
if (w9966_i2c_setscl(cam, 1) == -1)
return -1;
w9966_i2c_setscl(cam, 0);
}
w9966_setState(cam, W9966_STATE_PDEV, W9966_STATE_PDEV);
w9966_pdev_claim(cam);
w9966_i2c_setsda(cam, 1);
/* Setup a default capture mode */
if (w9966_setup(cam, 0, 0, 1023, 1023, 200, 160) != 0) {
DPRINTF("w9966_setup() failed.\n");
if (w9966_i2c_setscl(cam, 1) == -1)
return -1;
w9966_i2c_setscl(cam, 0);
return 0;
}
/* 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)
{
unsigned char data = 0x00;
int i;
w9966_i2c_setsda(cam, 1);
for (i = 0; i < 8; i++) {
if (w9966_i2c_setscl(cam, 1) == -1)
return -1;
data = data << 1;
if (w9966_i2c_getsda(cam))
data |= 0x01;
w9966_i2c_setscl(cam, 0);
}
return data;
}
#endif
w9966_pdev_release(cam);
/* Read a register from the i2c device.
Expects claimed pdev. -1 on error */
#if 0
static int w9966_rReg_i2c(struct w9966_dev *cam, int reg)
{
int data;
/* Fill in the video_device struct and register us to v4l */
memcpy(&cam->vdev, &w9966_template, sizeof(struct video_device));
video_set_drvdata(&cam->vdev, cam);
w9966_i2c_setsda(cam, 0);
w9966_i2c_setscl(cam, 0);
if (video_register_device(&cam->vdev, VFL_TYPE_GRABBER, video_nr) < 0)
if (w9966_i2c_wbyte(cam, W9966_I2C_W_ID) == -1 ||
w9966_i2c_wbyte(cam, reg) == -1)
return -1;
w9966_setState(cam, W9966_STATE_VDEV, W9966_STATE_VDEV);
w9966_i2c_setsda(cam, 1);
if (w9966_i2c_setscl(cam, 1) == -1)
return -1;
w9966_i2c_setsda(cam, 0);
w9966_i2c_setscl(cam, 0);
/* All ok */
printk(KERN_INFO "w9966cf: Found and initialized a webcam on %s.\n",
cam->pport->name);
return 0;
}
if (w9966_i2c_wbyte(cam, W9966_I2C_R_ID) == -1)
return -1;
data = w9966_i2c_rbyte(cam);
if (data == -1)
return -1;
w9966_i2c_setsda(cam, 0);
/* Terminate everything gracefully */
static void w9966_term(struct w9966_dev *cam)
if (w9966_i2c_setscl(cam, 1) == -1)
return -1;
w9966_i2c_setsda(cam, 1);
return data;
}
#endif
/* Write a register to the i2c device.
Expects claimed pdev. -1 on error */
static int w9966_wReg_i2c(struct w9966_dev *cam, int reg, int data)
{
/* Unregister from v4l */
if (w9966_getState(cam, W9966_STATE_VDEV, W9966_STATE_VDEV)) {
video_unregister_device(&cam->vdev);
w9966_setState(cam, W9966_STATE_VDEV, 0);
}
w9966_i2c_setsda(cam, 0);
w9966_i2c_setscl(cam, 0);
/* Terminate from IEEE1284 mode and release pdev block */
if (w9966_getState(cam, W9966_STATE_PDEV, W9966_STATE_PDEV)) {
w9966_pdev_claim(cam);
parport_negotiate(cam->pport, IEEE1284_MODE_COMPAT);
w9966_pdev_release(cam);
}
if (w9966_i2c_wbyte(cam, W9966_I2C_W_ID) == -1 ||
w9966_i2c_wbyte(cam, reg) == -1 ||
w9966_i2c_wbyte(cam, data) == -1)
return -1;
/* Unregister from parport */
if (w9966_getState(cam, W9966_STATE_PDEV, W9966_STATE_PDEV)) {
parport_unregister_device(cam->pdev);
w9966_setState(cam, W9966_STATE_PDEV, 0);
}
}
w9966_i2c_setsda(cam, 0);
if (w9966_i2c_setscl(cam, 1) == -1)
return -1;
w9966_i2c_setsda(cam, 1);
return 0;
}
/* Find a good length for capture window (used both for W and H)
A bit ugly but pretty functional. The capture length
......@@ -551,171 +554,10 @@ static int w9966_setup(struct w9966_dev *cam, int x1, int y1, int x2, int y2, in
}
/*
* Ugly and primitive i2c protocol functions
* Video4linux interfacing
*/
/* Sets the data line on the i2c bus.
Expects a claimed pdev. */
static inline void w9966_i2c_setsda(struct w9966_dev *cam, int state)
{
if (state)
cam->i2c_state |= W9966_I2C_W_DATA;
else
cam->i2c_state &= ~W9966_I2C_W_DATA;
w9966_wReg(cam, 0x18, cam->i2c_state);
udelay(5);
}
/* Get peripheral clock line
Expects a claimed pdev. */
static inline int w9966_i2c_getscl(struct w9966_dev *cam)
{
const unsigned char state = w9966_rReg(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 inline int w9966_i2c_setscl(struct w9966_dev *cam, int state)
{
unsigned long timeout;
if (state)
cam->i2c_state |= W9966_I2C_W_CLOCK;
else
cam->i2c_state &= ~W9966_I2C_W_CLOCK;
w9966_wReg(cam, 0x18, cam->i2c_state);
udelay(5);
/* we go to high, we also expect the peripheral to ack. */
if (state) {
timeout = jiffies + 100;
while (!w9966_i2c_getscl(cam)) {
if (time_after(jiffies, timeout))
return -1;
}
}
return 0;
}
/* Get peripheral data line
Expects a claimed pdev. */
static inline int w9966_i2c_getsda(struct w9966_dev *cam)
{
const unsigned char state = w9966_rReg(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)
{
int i;
for (i = 7; i >= 0; i--) {
w9966_i2c_setsda(cam, (data >> i) & 0x01);
if (w9966_i2c_setscl(cam, 1) == -1)
return -1;
w9966_i2c_setscl(cam, 0);
}
w9966_i2c_setsda(cam, 1);
if (w9966_i2c_setscl(cam, 1) == -1)
return -1;
w9966_i2c_setscl(cam, 0);
return 0;
}
/* 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)
{
unsigned char data = 0x00;
int i;
w9966_i2c_setsda(cam, 1);
for (i = 0; i < 8; i++) {
if (w9966_i2c_setscl(cam, 1) == -1)
return -1;
data = data << 1;
if (w9966_i2c_getsda(cam))
data |= 0x01;
w9966_i2c_setscl(cam, 0);
}
return data;
}
#endif
/* Read a register from the i2c device.
Expects claimed pdev. -1 on error */
#if 0
static int w9966_rReg_i2c(struct w9966_dev *cam, int reg)
{
int data;
w9966_i2c_setsda(cam, 0);
w9966_i2c_setscl(cam, 0);
if (w9966_i2c_wbyte(cam, W9966_I2C_W_ID) == -1 ||
w9966_i2c_wbyte(cam, reg) == -1)
return -1;
w9966_i2c_setsda(cam, 1);
if (w9966_i2c_setscl(cam, 1) == -1)
return -1;
w9966_i2c_setsda(cam, 0);
w9966_i2c_setscl(cam, 0);
if (w9966_i2c_wbyte(cam, W9966_I2C_R_ID) == -1)
return -1;
data = w9966_i2c_rbyte(cam);
if (data == -1)
return -1;
w9966_i2c_setsda(cam, 0);
if (w9966_i2c_setscl(cam, 1) == -1)
return -1;
w9966_i2c_setsda(cam, 1);
return data;
}
#endif
/* Write a register to the i2c device.
Expects claimed pdev. -1 on error */
static int w9966_wReg_i2c(struct w9966_dev *cam, int reg, int data)
{
w9966_i2c_setsda(cam, 0);
w9966_i2c_setscl(cam, 0);
if (w9966_i2c_wbyte(cam, W9966_I2C_W_ID) == -1 ||
w9966_i2c_wbyte(cam, reg) == -1 ||
w9966_i2c_wbyte(cam, data) == -1)
return -1;
w9966_i2c_setsda(cam, 0);
if (w9966_i2c_setscl(cam, 1) == -1)
return -1;
w9966_i2c_setsda(cam, 1);
return 0;
}
/*
* Video4linux interfacing
*/
static long w9966_v4l_do_ioctl(struct file *file, unsigned int cmd, void *arg)
static long w9966_v4l_do_ioctl(struct file *file, unsigned int cmd, void *arg)
{
struct w9966_dev *cam = video_drvdata(file);
......@@ -927,6 +769,127 @@ static ssize_t w9966_v4l_read(struct file *file, char __user *buf,
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,
.read = w9966_v4l_read,
};
static struct video_device w9966_template = {
.name = W9966_DRIVERNAME,
.fops = &w9966_fops,
.release = video_device_release_empty,
};
/* Initialize camera device. Setup all internal flags, set a
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)
{
if (cam->dev_state != 0)
return -1;
cam->pport = port;
cam->brightness = 128;
cam->contrast = 64;
cam->color = 64;
cam->hue = 0;
/* Select requested transfer mode */
switch (parmode) {
default: /* Auto-detect (priority: hw-ecp, hw-epp, sw-ecp) */
case 0:
if (port->modes & PARPORT_MODE_ECP)
cam->ppmode = IEEE1284_MODE_ECP;
else if (port->modes & PARPORT_MODE_EPP)
cam->ppmode = IEEE1284_MODE_EPP;
else
cam->ppmode = IEEE1284_MODE_ECP;
break;
case 1: /* hw- or sw-ecp */
cam->ppmode = IEEE1284_MODE_ECP;
break;
case 2: /* hw- or sw-epp */
cam->ppmode = IEEE1284_MODE_EPP;
break;
}
/* Tell the parport driver that we exists */
cam->pdev = parport_register_device(port, "w9966", NULL, NULL, NULL, 0, NULL);
if (cam->pdev == NULL) {
DPRINTF("parport_register_device() failed\n");
return -1;
}
w9966_setState(cam, W9966_STATE_PDEV, W9966_STATE_PDEV);
w9966_pdev_claim(cam);
/* Setup a default capture mode */
if (w9966_setup(cam, 0, 0, 1023, 1023, 200, 160) != 0) {
DPRINTF("w9966_setup() failed.\n");
return -1;
}
w9966_pdev_release(cam);
/* Fill in the video_device struct and register us to v4l */
memcpy(&cam->vdev, &w9966_template, sizeof(struct video_device));
video_set_drvdata(&cam->vdev, cam);
if (video_register_device(&cam->vdev, VFL_TYPE_GRABBER, video_nr) < 0)
return -1;
w9966_setState(cam, W9966_STATE_VDEV, W9966_STATE_VDEV);
/* All ok */
printk(KERN_INFO "w9966cf: Found and initialized a webcam on %s.\n",
cam->pport->name);
return 0;
}
/* Terminate everything gracefully */
static void w9966_term(struct w9966_dev *cam)
{
/* Unregister from v4l */
if (w9966_getState(cam, W9966_STATE_VDEV, W9966_STATE_VDEV)) {
video_unregister_device(&cam->vdev);
w9966_setState(cam, W9966_STATE_VDEV, 0);
}
/* Terminate from IEEE1284 mode and release pdev block */
if (w9966_getState(cam, W9966_STATE_PDEV, W9966_STATE_PDEV)) {
w9966_pdev_claim(cam);
parport_negotiate(cam->pport, IEEE1284_MODE_COMPAT);
w9966_pdev_release(cam);
}
/* Unregister from parport */
if (w9966_getState(cam, W9966_STATE_PDEV, W9966_STATE_PDEV)) {
parport_unregister_device(cam->pdev);
w9966_setState(cam, W9966_STATE_PDEV, 0);
}
}
/* Called once for every parport on init */
static void w9966_attach(struct parport *port)
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment
GitLab Nexedi Edition | About GitLab | About Nexedi | 沪ICP备2021021310号-2 | 沪ICP备2021021310号-7