*/
#define W9966_DRIVERNAME "W9966CF Webcam"
-#define W9966_MAXCAMS 4 // Maximum number of cameras
-#define W9966_RBUFFER 2048 // Read buffer (must be an even number)
-#define W9966_SRAMSIZE 131072 // 128kb
-#define W9966_SRAMID 0x02 // check w9966cf.pdf
+#define W9966_MAXCAMS 4 /* Maximum number of cameras */
+#define W9966_RBUFFER 2048 /* Read buffer (must be an even number) */
+#define W9966_SRAMSIZE 131072 /* 128kb */
+#define W9966_SRAMID 0x02 /* check w9966cf.pdf */
-// Empirically determined window limits
+/* Empirically determined window limits */
#define W9966_WND_MIN_X 16
#define W9966_WND_MIN_Y 14
#define W9966_WND_MAX_X 705
#define W9966_WND_MAX_W (W9966_WND_MAX_X - W9966_WND_MIN_X)
#define W9966_WND_MAX_H (W9966_WND_MAX_Y - W9966_WND_MIN_Y)
-// Keep track of our current state
+/* Keep track of our current state */
#define W9966_STATE_PDEV 0x01
#define W9966_STATE_CLAIMED 0x02
#define W9966_STATE_VDEV 0x04
unsigned char dev_state;
unsigned char i2c_state;
unsigned short ppmode;
- struct parport* pport;
- struct pardevice* pdev;
+ struct parport *pport;
+ struct pardevice *pdev;
struct video_device vdev;
unsigned short width;
unsigned short height;
#ifdef MODULE
-static const char* pardev[] = {[0 ... W9966_MAXCAMS] = ""};
+static const char *pardev[] = {[0 ... W9966_MAXCAMS] = ""};
#else
-static const char* pardev[] = {[0 ... W9966_MAXCAMS] = "aggressive"};
+static const char *pardev[] = {[0 ... W9966_MAXCAMS] = "aggressive"};
#endif
module_param_array(pardev, charp, NULL, 0);
-MODULE_PARM_DESC(pardev, "pardev: where to search for\n\
-\teach camera. 'aggressive' means brute-force search.\n\
-\tEg: >pardev=parport3,aggressive,parport2,parport1< would assign\n\
-\tcam 1 to parport3 and search every parport for cam 2 etc...");
+MODULE_PARM_DESC(pardev, "pardev: where to search for\n"
+ "\teach camera. 'aggressive' means brute-force search.\n"
+ "\tEg: >pardev=parport3,aggressive,parport2,parport1< would assign\n"
+ "\tcam 1 to parport3 and search every parport for cam 2 etc...");
static int parmode;
module_param(parmode, int, 0);
* 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_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);
+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);
+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_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_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 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);
+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);
+static int w9966_i2c_rbyte(struct w9966_dev *cam);
#endif
static long w9966_v4l_ioctl(struct file *file,
*/
-// Set camera phase flags, so we know what to uninit when terminating
-static inline void w9966_setState(struct w9966_dev* cam, int mask, int val)
+/* Set camera phase flags, so we know what to uninit when terminating */
+static inline void w9966_setState(struct w9966_dev *cam, int mask, int val)
{
cam->dev_state = (cam->dev_state & ~mask) ^ val;
}
-// Get camera phase flags
-static inline int w9966_getState(struct w9966_dev* cam, int mask, int val)
+/* Get camera phase flags */
+static inline int w9966_getState(struct w9966_dev *cam, int mask, int val)
{
return ((cam->dev_state & mask) == val);
}
-// Claim parport for ourself
-static inline void w9966_pdev_claim(struct w9966_dev* cam)
+/* Claim parport for ourself */
+static inline void w9966_pdev_claim(struct w9966_dev *cam)
{
if (w9966_getState(cam, W9966_STATE_CLAIMED, W9966_STATE_CLAIMED))
return;
w9966_setState(cam, W9966_STATE_CLAIMED, W9966_STATE_CLAIMED);
}
-// Release parport for others to use
-static inline void w9966_pdev_release(struct w9966_dev* cam)
+/* Release parport for others to use */
+static inline void w9966_pdev_release(struct w9966_dev *cam)
{
if (w9966_getState(cam, W9966_STATE_CLAIMED, 0))
return;
w9966_setState(cam, W9966_STATE_CLAIMED, 0);
}
-// Read register from W9966 interface-chip
-// Expects a claimed pdev
-// -1 on error, else register data (byte)
-static int w9966_rReg(struct w9966_dev* cam, int reg)
+/* Read register from W9966 interface-chip
+ Expects a claimed pdev
+ -1 on error, else register data (byte) */
+static int w9966_rReg(struct w9966_dev *cam, int reg)
{
- // ECP, read, regtransfer, REG, REG, REG, REG, REG
+ /* ECP, read, regtransfer, REG, REG, REG, REG, REG */
const unsigned char addr = 0x80 | (reg & 0x1f);
unsigned char val;
return val;
}
-// Write register to W9966 interface-chip
-// Expects a claimed pdev
-// -1 on error
-static int w9966_wReg(struct w9966_dev* cam, int reg, int data)
+/* Write register to W9966 interface-chip
+ Expects a claimed pdev
+ -1 on error */
+static int w9966_wReg(struct w9966_dev *cam, int reg, int data)
{
- // ECP, write, regtransfer, REG, REG, REG, REG, REG
+ /* ECP, write, regtransfer, REG, REG, REG, REG, REG */
const unsigned char addr = 0xc0 | (reg & 0x1f);
const unsigned char val = 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)
+/* 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->color = 64;
cam->hue = 0;
-// Select requested transfer mode
- switch(parmode)
- {
- default: // Auto-detect (priority: hw-ecp, hw-epp, sw-ecp)
+/* 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
cam->ppmode = IEEE1284_MODE_ECP;
break;
- case 1: // hw- or sw-ecp
+ case 1: /* hw- or sw-ecp */
cam->ppmode = IEEE1284_MODE_ECP;
break;
- case 2: // hw- or sw-epp
+ case 2: /* hw- or sw-epp */
cam->ppmode = IEEE1284_MODE_EPP;
break;
}
-// Tell the parport driver that we exists
+/* 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");
w9966_pdev_claim(cam);
-// Setup a default capture mode
+/* 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
+/* 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_setState(cam, W9966_STATE_VDEV, W9966_STATE_VDEV);
- // All ok
- printk(
- "w9966cf: Found and initialized a webcam on %s.\n",
- cam->pport->name
- );
+ /* 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)
+/* Terminate everything gracefully */
+static void w9966_term(struct w9966_dev *cam)
{
-// Unregister from v4l
+/* 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
+/* 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
+/* 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);
}
-// Find a good length for capture window (used both for W and H)
-// A bit ugly but pretty functional. The capture length
-// have to match the downscale
+/* Find a good length for capture window (used both for W and H)
+ A bit ugly but pretty functional. The capture length
+ have to match the downscale */
static int w9966_findlen(int near, int size, int maxlen)
{
int bestlen = size;
int besterr = abs(near - bestlen);
int len;
- for(len = size+1;len < maxlen;len++)
- {
+ for (len = size + 1; len < maxlen; len++) {
int err;
- if ( ((64*size) %len) != 0)
+ if (((64 * size) % len) != 0)
continue;
err = abs(near - len);
- // Only continue as long as we keep getting better values
+ /* Only continue as long as we keep getting better values */
if (err > besterr)
break;
return bestlen;
}
-// Modify capture window (if necessary)
-// and calculate downscaling
-// Return -1 on error
-static int w9966_calcscale(int size, int min, int max, int* beg, int* end, unsigned char* factor)
+/* Modify capture window (if necessary)
+ and calculate downscaling
+ Return -1 on error */
+static int w9966_calcscale(int size, int min, int max, int *beg, int *end, unsigned char *factor)
{
int maxlen = max - min;
int len = *end - *beg + 1;
int newlen = w9966_findlen(len, size, maxlen);
int err = newlen - len;
- // Check for bad format
+ /* Check for bad format */
if (newlen > maxlen || newlen < size)
return -1;
- // Set factor (6 bit fixed)
- *factor = (64*size) / newlen;
+ /* Set factor (6 bit fixed) */
+ *factor = (64 * size) / newlen;
if (*factor == 64)
- *factor = 0x00; // downscale is disabled
+ *factor = 0x00; /* downscale is disabled */
else
- *factor |= 0x80; // set downscale-enable bit
+ *factor |= 0x80; /* set downscale-enable bit */
- // Modify old beginning and end
+ /* Modify old beginning and end */
*beg -= err / 2;
*end += err - (err / 2);
- // Move window if outside borders
+ /* Move window if outside borders */
if (*beg < min) {
*end += min - *beg;
*beg += min - *beg;
return 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)
+/* 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)
{
unsigned int i;
unsigned int enh_s, enh_e;
};
- if (w*h*2 > W9966_SRAMSIZE)
- {
+ if (w * h * 2 > W9966_SRAMSIZE) {
DPRINTF("capture window exceeds SRAM size!.\n");
- w = 200; h = 160; // Pick default values
+ w = 200; h = 160; /* Pick default values */
}
w &= ~0x1;
- if (w < 2) w = 2;
- if (h < 1) h = 1;
- if (w > W9966_WND_MAX_W) w = W9966_WND_MAX_W;
- if (h > W9966_WND_MAX_H) h = W9966_WND_MAX_H;
+ if (w < 2)
+ w = 2;
+ if (h < 1)
+ h = 1;
+ if (w > W9966_WND_MAX_W)
+ w = W9966_WND_MAX_W;
+ if (h > W9966_WND_MAX_H)
+ h = W9966_WND_MAX_H;
cam->width = w;
cam->height = h;
enh_s = 0;
- enh_e = w*h*2;
-
-// Modify capture window if necessary and calculate downscaling
- if (
- w9966_calcscale(w, W9966_WND_MIN_X, W9966_WND_MAX_X, &x1, &x2, &scale_x) != 0 ||
- w9966_calcscale(h, W9966_WND_MIN_Y, W9966_WND_MAX_Y, &y1, &y2, &scale_y) != 0
- ) return -1;
-
- DPRINTF(
- "%dx%d, x: %d<->%d, y: %d<->%d, sx: %d/64, sy: %d/64.\n",
- w, h, x1, x2, y1, y2, scale_x&~0x80, scale_y&~0x80
- );
-
-// Setup registers
- regs[0x00] = 0x00; // Set normal operation
- regs[0x01] = 0x18; // Capture mode
- regs[0x02] = scale_y; // V-scaling
- regs[0x03] = scale_x; // H-scaling
-
- // Capture window
- regs[0x04] = (x1 & 0x0ff); // X-start (8 low bits)
- regs[0x05] = (x1 & 0x300)>>8; // X-start (2 high bits)
- regs[0x06] = (y1 & 0x0ff); // Y-start (8 low bits)
- regs[0x07] = (y1 & 0x300)>>8; // Y-start (2 high bits)
- regs[0x08] = (x2 & 0x0ff); // X-end (8 low bits)
- regs[0x09] = (x2 & 0x300)>>8; // X-end (2 high bits)
- regs[0x0a] = (y2 & 0x0ff); // Y-end (8 low bits)
-
- regs[0x0c] = W9966_SRAMID; // SRAM-banks (1x 128kb)
-
- // Enhancement layer
- regs[0x0d] = (enh_s& 0x000ff); // Enh. start (0-7)
- regs[0x0e] = (enh_s& 0x0ff00)>>8; // Enh. start (8-15)
- regs[0x0f] = (enh_s& 0x70000)>>16; // Enh. start (16-17/18??)
- regs[0x10] = (enh_e& 0x000ff); // Enh. end (0-7)
- regs[0x11] = (enh_e& 0x0ff00)>>8; // Enh. end (8-15)
- regs[0x12] = (enh_e& 0x70000)>>16; // Enh. end (16-17/18??)
-
- // Misc
- regs[0x13] = 0x40; // VEE control (raw 4:2:2)
- regs[0x17] = 0x00; // ???
- regs[0x18] = cam->i2c_state = 0x00; // Serial bus
- regs[0x19] = 0xff; // I/O port direction control
- regs[0x1a] = 0xff; // I/O port data register
- regs[0x1b] = 0x10; // ???
-
- // SAA7111 chip settings
+ enh_e = w * h * 2;
+
+/* Modify capture window if necessary and calculate downscaling */
+ if (w9966_calcscale(w, W9966_WND_MIN_X, W9966_WND_MAX_X, &x1, &x2, &scale_x) != 0 ||
+ w9966_calcscale(h, W9966_WND_MIN_Y, W9966_WND_MAX_Y, &y1, &y2, &scale_y) != 0)
+ return -1;
+
+ DPRINTF("%dx%d, x: %d<->%d, y: %d<->%d, sx: %d/64, sy: %d/64.\n",
+ w, h, x1, x2, y1, y2, scale_x & ~0x80, scale_y & ~0x80);
+
+/* Setup registers */
+ regs[0x00] = 0x00; /* Set normal operation */
+ regs[0x01] = 0x18; /* Capture mode */
+ regs[0x02] = scale_y; /* V-scaling */
+ regs[0x03] = scale_x; /* H-scaling */
+
+ /* Capture window */
+ regs[0x04] = (x1 & 0x0ff); /* X-start (8 low bits) */
+ regs[0x05] = (x1 & 0x300)>>8; /* X-start (2 high bits) */
+ regs[0x06] = (y1 & 0x0ff); /* Y-start (8 low bits) */
+ regs[0x07] = (y1 & 0x300)>>8; /* Y-start (2 high bits) */
+ regs[0x08] = (x2 & 0x0ff); /* X-end (8 low bits) */
+ regs[0x09] = (x2 & 0x300)>>8; /* X-end (2 high bits) */
+ regs[0x0a] = (y2 & 0x0ff); /* Y-end (8 low bits) */
+
+ regs[0x0c] = W9966_SRAMID; /* SRAM-banks (1x 128kb) */
+
+ /* Enhancement layer */
+ regs[0x0d] = (enh_s & 0x000ff); /* Enh. start (0-7) */
+ regs[0x0e] = (enh_s & 0x0ff00) >> 8; /* Enh. start (8-15) */
+ regs[0x0f] = (enh_s & 0x70000) >> 16; /* Enh. start (16-17/18??) */
+ regs[0x10] = (enh_e & 0x000ff); /* Enh. end (0-7) */
+ regs[0x11] = (enh_e & 0x0ff00) >> 8; /* Enh. end (8-15) */
+ regs[0x12] = (enh_e & 0x70000) >> 16; /* Enh. end (16-17/18??) */
+
+ /* Misc */
+ regs[0x13] = 0x40; /* VEE control (raw 4:2:2) */
+ regs[0x17] = 0x00; /* ??? */
+ regs[0x18] = cam->i2c_state = 0x00; /* Serial bus */
+ regs[0x19] = 0xff; /* I/O port direction control */
+ regs[0x1a] = 0xff; /* I/O port data register */
+ regs[0x1b] = 0x10; /* ??? */
+
+ /* SAA7111 chip settings */
saa7111_regs[0x0a] = cam->brightness;
saa7111_regs[0x0b] = cam->contrast;
saa7111_regs[0x0c] = cam->color;
saa7111_regs[0x0d] = cam->hue;
-// Reset (ECP-fifo & serial-bus)
+/* Reset (ECP-fifo & serial-bus) */
if (w9966_wReg(cam, 0x00, 0x03) == -1)
return -1;
-// Write regs to w9966cf chip
+/* Write regs to w9966cf chip */
for (i = 0; i < 0x1c; i++)
if (w9966_wReg(cam, i, regs[i]) == -1)
return -1;
-// Write regs to saa7111 chip
+/* Write regs to saa7111 chip */
for (i = 0; i < 0x20; i++)
if (w9966_wReg_i2c(cam, i, saa7111_regs[i]) == -1)
return -1;
* Ugly and primitive i2c protocol functions
*/
-// Sets the data line on the i2c bus.
-// Expects a claimed pdev.
-static inline void w9966_i2c_setsda(struct w9966_dev* cam, int state)
+/* 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;
udelay(5);
}
-// Get peripheral clock line
-// Expects a claimed pdev.
-static inline int w9966_i2c_getscl(struct w9966_dev* cam)
+/* 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)
+/* 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;
w9966_wReg(cam, 0x18, cam->i2c_state);
udelay(5);
- // we go to high, we also expect the peripheral to ack.
+ /* we go to high, we also expect the peripheral to ack. */
if (state) {
timeout = jiffies + 100;
while (!w9966_i2c_getscl(cam)) {
return 0;
}
-// Get peripheral data line
-// Expects a claimed pdev.
-static inline int w9966_i2c_getsda(struct w9966_dev* cam)
+/* 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)
+/* 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--)
- {
+
+ for (i = 7; i >= 0; i--) {
w9966_i2c_setsda(cam, (data >> i) & 0x01);
if (w9966_i2c_setscl(cam, 1) == -1)
return 0;
}
-// Read a data byte with ack from the i2c-bus
-// Expects a claimed pdev. -1 on error
+/* 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_dev *cam)
{
unsigned char data = 0x00;
int i;
w9966_i2c_setsda(cam, 1);
- for (i = 0; i < 8; i++)
- {
+ for (i = 0; i < 8; i++) {
if (w9966_i2c_setscl(cam, 1) == -1)
return -1;
data = data << 1;
}
#endif
-// Read a register from the i2c device.
-// Expects claimed pdev. -1 on error
+/* 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)
+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
- )
+ if (w9966_i2c_wbyte(cam, W9966_I2C_W_ID) == -1 ||
+ w9966_i2c_wbyte(cam, reg) == -1)
return -1;
w9966_i2c_setsda(cam, 1);
w9966_i2c_setsda(cam, 0);
w9966_i2c_setscl(cam, 0);
- if (
- w9966_i2c_wbyte(cam, W9966_I2C_R_ID) == -1 ||
- (data = w9966_i2c_rbyte(cam)) == -1
- )
+ 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);
}
#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)
+/* 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
- )
+ 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);
{
struct w9966_dev *cam = video_drvdata(file);
- switch(cmd)
- {
+ switch (cmd) {
case VIDIOCGCAP:
{
static struct video_capability vcap = {
case VIDIOCGCHAN:
{
struct video_channel *vch = arg;
- if(vch->channel != 0) // We only support one channel (#0)
+ if (vch->channel != 0) /* We only support one channel (#0) */
return -EINVAL;
- memset(vch,0,sizeof(*vch));
+ 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)
+ if (vch->channel != 0)
return -EINVAL;
return 0;
}
case VIDIOCGTUNER:
{
struct video_tuner *vtune = arg;
- if(vtune->tuner != 0)
+ if (vtune->tuner != 0)
return -EINVAL;
strcpy(vtune->name, "no tuner");
vtune->rangelow = 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
+ 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;
if (vwin->height < 1 || vwin->height > W9966_WND_MAX_H)
return -EINVAL;
- // Update camera regs
+ /* Update camera regs */
w9966_pdev_claim(cam);
ret = w9966_setup(cam, 0, 0, 1023, 1023, vwin->width, vwin->height);
w9966_pdev_release(cam);
vwin->height = cam->height;
return 0;
}
- // Unimplemented
+ /* Unimplemented */
case VIDIOCCAPTURE:
case VIDIOCGFBUF:
case VIDIOCSFBUF:
return video_usercopy(file, cmd, arg, w9966_v4l_do_ioctl);
}
-// Capture data
+/* 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);
- unsigned char addr = 0xa0; // ECP, read, CCD-transfer, 00000
+ unsigned char addr = 0xa0; /* ECP, read, CCD-transfer, 00000 */
unsigned char __user *dest = (unsigned char __user *)buf;
unsigned long dleft = count;
unsigned char *tbuf;
- // Why would anyone want more than this??
+ /* Why would anyone want more than this?? */
if (count > cam->width * cam->height * 2)
return -EINVAL;
w9966_pdev_claim(cam);
- w9966_wReg(cam, 0x00, 0x02); // Reset ECP-FIFO buffer
- w9966_wReg(cam, 0x00, 0x00); // Return to normal operation
- w9966_wReg(cam, 0x01, 0x98); // Enable capture
-
- // write special capture-addr and negotiate into data transfer
- if (
- (parport_negotiate(cam->pport, cam->ppmode|IEEE1284_ADDR) != 0 )||
- (parport_write(cam->pport, &addr, 1) != 1 )||
- (parport_negotiate(cam->pport, cam->ppmode|IEEE1284_DATA) != 0 )
- ) {
+ w9966_wReg(cam, 0x00, 0x02); /* Reset ECP-FIFO buffer */
+ w9966_wReg(cam, 0x00, 0x00); /* Return to normal operation */
+ w9966_wReg(cam, 0x01, 0x98); /* Enable capture */
+
+ /* write special capture-addr and negotiate into data transfer */
+ if ((parport_negotiate(cam->pport, cam->ppmode|IEEE1284_ADDR) != 0) ||
+ (parport_write(cam->pport, &addr, 1) != 1) ||
+ (parport_negotiate(cam->pport, cam->ppmode|IEEE1284_DATA) != 0)) {
w9966_pdev_release(cam);
return -EFAULT;
}
goto out;
}
- while(dleft > 0)
- {
+ while (dleft > 0) {
unsigned long tsize = (dleft > W9966_RBUFFER) ? W9966_RBUFFER : dleft;
if (parport_read(cam->pport, tbuf, tsize) < tsize) {
dleft -= tsize;
}
- w9966_wReg(cam, 0x01, 0x18); // Disable capture
+ w9966_wReg(cam, 0x01, 0x18); /* Disable capture */
out:
kfree(tbuf);
}
-// Called once for every parport on init
+/* Called once for every parport on init */
static void w9966_attach(struct parport *port)
{
int i;
- for (i = 0; i < W9966_MAXCAMS; i++)
- {
- if (w9966_cams[i].dev_state != 0) // Cam is already assigned
+ for (i = 0; i < W9966_MAXCAMS; i++) {
+ if (w9966_cams[i].dev_state != 0) /* Cam is already assigned */
continue;
- if (
- strcmp(pardev[i], "aggressive") == 0 ||
- strcmp(pardev[i], port->name) == 0
- ) {
+ if (strcmp(pardev[i], "aggressive") == 0 || strcmp(pardev[i], port->name) == 0) {
if (w9966_init(&w9966_cams[i], port) != 0)
- w9966_term(&w9966_cams[i]);
- break; // return
+ w9966_term(&w9966_cams[i]);
+ break; /* return */
}
}
}
-// Called once for every parport on termination
+/* Called once for every parport on termination */
static void w9966_detach(struct parport *port)
{
int i;
+
for (i = 0; i < W9966_MAXCAMS; i++)
- if (w9966_cams[i].dev_state != 0 && w9966_cams[i].pport == port)
- w9966_term(&w9966_cams[i]);
+ if (w9966_cams[i].dev_state != 0 && w9966_cams[i].pport == port)
+ w9966_term(&w9966_cams[i]);
}
.detach = w9966_detach,
};
-// Module entry point
+/* Module entry point */
static int __init w9966_mod_init(void)
{
int i;
+
for (i = 0; i < W9966_MAXCAMS; i++)
w9966_cams[i].dev_state = 0;
return parport_register_driver(&w9966_ppd);
}
-// Module cleanup
+/* Module cleanup */
static void __exit w9966_mod_term(void)
{
parport_unregister_driver(&w9966_ppd);
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