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linux/drivers/media/parport/pms.c
Mauro Carvalho Chehab 64e01cbd9d [media] pms: Fix a bad usage of the stack 
As warned by smatch:
	drivers/media/parport/pms.c:632:21: warning: Variable length array is used.

The pms driver is doing something really bad: it is using the
stack to read data into a buffer whose size is given by the
user by the read() syscall. Replace it by a dynamically allocated
buffer.

Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
2014-09-26 06:47:55 -03:00

1157 lines
26 KiB
C
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/*
* Media Vision Pro Movie Studio
* or
* "all you need is an I2C bus some RAM and a prayer"
*
* This draws heavily on code
*
* (c) Wolfgang Koehler, wolf@first.gmd.de, Dec. 1994
* Kiefernring 15
* 14478 Potsdam, Germany
*
* Most of this code is directly derived from his userspace driver.
* His driver works so send any reports to alan@lxorguk.ukuu.org.uk
* unless the userspace driver also doesn't work for you...
*
* Changes:
* 25-11-2009 Hans Verkuil <hverkuil@xs4all.nl>
* - converted to version 2 of the V4L API.
* 08/07/2003 Daniele Bellucci <bellucda@tiscali.it>
* - pms_capture: report back -EFAULT
*/
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/ioport.h>
#include <linux/init.h>
#include <linux/mutex.h>
#include <linux/uaccess.h>
#include <linux/isa.h>
#include <asm/io.h>
#include <linux/videodev2.h>
#include <media/v4l2-common.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-fh.h>
#include <media/v4l2-event.h>
#include <media/v4l2-device.h>
MODULE_LICENSE("GPL");
MODULE_VERSION("0.0.5");
#define MOTOROLA 1
#define PHILIPS2 2 /* SAA7191 */
#define PHILIPS1 3
#define MVVMEMORYWIDTH 0x40 /* 512 bytes */
struct i2c_info {
u8 slave;
u8 sub;
u8 data;
u8 hits;
};
struct pms {
struct v4l2_device v4l2_dev;
struct video_device vdev;
struct v4l2_ctrl_handler hdl;
int height;
int width;
int depth;
int input;
struct mutex lock;
int i2c_count;
struct i2c_info i2cinfo[64];
int decoder;
int standard; /* 0 - auto 1 - ntsc 2 - pal 3 - secam */
v4l2_std_id std;
int io;
int data;
void __iomem *mem;
};
/*
* I/O ports and Shared Memory
*/
static int io_port = 0x250;
module_param(io_port, int, 0);
static int mem_base = 0xc8000;
module_param(mem_base, int, 0);
static int video_nr = -1;
module_param(video_nr, int, 0);
static inline void mvv_write(struct pms *dev, u8 index, u8 value)
{
outw(index | (value << 8), dev->io);
}
static inline u8 mvv_read(struct pms *dev, u8 index)
{
outb(index, dev->io);
return inb(dev->data);
}
static int pms_i2c_stat(struct pms *dev, u8 slave)
{
int counter = 0;
int i;
outb(0x28, dev->io);
while ((inb(dev->data) & 0x01) == 0)
if (counter++ == 256)
break;
while ((inb(dev->data) & 0x01) != 0)
if (counter++ == 256)
break;
outb(slave, dev->io);
counter = 0;
while ((inb(dev->data) & 0x01) == 0)
if (counter++ == 256)
break;
while ((inb(dev->data) & 0x01) != 0)
if (counter++ == 256)
break;
for (i = 0; i < 12; i++) {
char st = inb(dev->data);
if ((st & 2) != 0)
return -1;
if ((st & 1) == 0)
break;
}
outb(0x29, dev->io);
return inb(dev->data);
}
static int pms_i2c_write(struct pms *dev, u16 slave, u16 sub, u16 data)
{
int skip = 0;
int count;
int i;
for (i = 0; i < dev->i2c_count; i++) {
if ((dev->i2cinfo[i].slave == slave) &&
(dev->i2cinfo[i].sub == sub)) {
if (dev->i2cinfo[i].data == data)
skip = 1;
dev->i2cinfo[i].data = data;
i = dev->i2c_count + 1;
}
}
if (i == dev->i2c_count && dev->i2c_count < 64) {
dev->i2cinfo[dev->i2c_count].slave = slave;
dev->i2cinfo[dev->i2c_count].sub = sub;
dev->i2cinfo[dev->i2c_count].data = data;
dev->i2c_count++;
}
if (skip)
return 0;
mvv_write(dev, 0x29, sub);
mvv_write(dev, 0x2A, data);
mvv_write(dev, 0x28, slave);
outb(0x28, dev->io);
count = 0;
while ((inb(dev->data) & 1) == 0)
if (count > 255)
break;
while ((inb(dev->data) & 1) != 0)
if (count > 255)
break;
count = inb(dev->data);
if (count & 2)
return -1;
return count;
}
static int pms_i2c_read(struct pms *dev, int slave, int sub)
{
int i;
for (i = 0; i < dev->i2c_count; i++) {
if (dev->i2cinfo[i].slave == slave && dev->i2cinfo[i].sub == sub)
return dev->i2cinfo[i].data;
}
return 0;
}
static void pms_i2c_andor(struct pms *dev, int slave, int sub, int and, int or)
{
u8 tmp;
tmp = pms_i2c_read(dev, slave, sub);
tmp = (tmp & and) | or;
pms_i2c_write(dev, slave, sub, tmp);
}
/*
* Control functions
*/
static void pms_videosource(struct pms *dev, short source)
{
switch (dev->decoder) {
case MOTOROLA:
break;
case PHILIPS2:
pms_i2c_andor(dev, 0x8a, 0x06, 0x7f, source ? 0x80 : 0);
break;
case PHILIPS1:
break;
}
mvv_write(dev, 0x2E, 0x31);
/* Was: mvv_write(dev, 0x2E, source ? 0x31 : 0x30);
But could not make this work correctly. Only Composite input
worked for me. */
}
static void pms_hue(struct pms *dev, short hue)
{
switch (dev->decoder) {
case MOTOROLA:
pms_i2c_write(dev, 0x8a, 0x00, hue);
break;
case PHILIPS2:
pms_i2c_write(dev, 0x8a, 0x07, hue);
break;
case PHILIPS1:
pms_i2c_write(dev, 0x42, 0x07, hue);
break;
}
}
static void pms_saturation(struct pms *dev, short sat)
{
switch (dev->decoder) {
case MOTOROLA:
pms_i2c_write(dev, 0x8a, 0x00, sat);
break;
case PHILIPS1:
pms_i2c_write(dev, 0x42, 0x12, sat);
break;
}
}
static void pms_contrast(struct pms *dev, short contrast)
{
switch (dev->decoder) {
case MOTOROLA:
pms_i2c_write(dev, 0x8a, 0x00, contrast);
break;
case PHILIPS1:
pms_i2c_write(dev, 0x42, 0x13, contrast);
break;
}
}
static void pms_brightness(struct pms *dev, short brightness)
{
switch (dev->decoder) {
case MOTOROLA:
pms_i2c_write(dev, 0x8a, 0x00, brightness);
pms_i2c_write(dev, 0x8a, 0x00, brightness);
pms_i2c_write(dev, 0x8a, 0x00, brightness);
break;
case PHILIPS1:
pms_i2c_write(dev, 0x42, 0x19, brightness);
break;
}
}
static void pms_format(struct pms *dev, short format)
{
int target;
dev->standard = format;
if (dev->decoder == PHILIPS1)
target = 0x42;
else if (dev->decoder == PHILIPS2)
target = 0x8a;
else
return;
switch (format) {
case 0: /* Auto */
pms_i2c_andor(dev, target, 0x0d, 0xfe, 0x00);
pms_i2c_andor(dev, target, 0x0f, 0x3f, 0x80);
break;
case 1: /* NTSC */
pms_i2c_andor(dev, target, 0x0d, 0xfe, 0x00);
pms_i2c_andor(dev, target, 0x0f, 0x3f, 0x40);
break;
case 2: /* PAL */
pms_i2c_andor(dev, target, 0x0d, 0xfe, 0x00);
pms_i2c_andor(dev, target, 0x0f, 0x3f, 0x00);
break;
case 3: /* SECAM */
pms_i2c_andor(dev, target, 0x0d, 0xfe, 0x01);
pms_i2c_andor(dev, target, 0x0f, 0x3f, 0x00);
break;
}
}
#ifdef FOR_FUTURE_EXPANSION
/*
* These features of the PMS card are not currently exposes. They
* could become a private v4l ioctl for PMSCONFIG or somesuch if
* people need it. We also don't yet use the PMS interrupt.
*/
static void pms_hstart(struct pms *dev, short start)
{
switch (dev->decoder) {
case PHILIPS1:
pms_i2c_write(dev, 0x8a, 0x05, start);
pms_i2c_write(dev, 0x8a, 0x18, start);
break;
case PHILIPS2:
pms_i2c_write(dev, 0x42, 0x05, start);
pms_i2c_write(dev, 0x42, 0x18, start);
break;
}
}
/*
* Bandpass filters
*/
static void pms_bandpass(struct pms *dev, short pass)
{
if (dev->decoder == PHILIPS2)
pms_i2c_andor(dev, 0x8a, 0x06, 0xcf, (pass & 0x03) << 4);
else if (dev->decoder == PHILIPS1)
pms_i2c_andor(dev, 0x42, 0x06, 0xcf, (pass & 0x03) << 4);
}
static void pms_antisnow(struct pms *dev, short snow)
{
if (dev->decoder == PHILIPS2)
pms_i2c_andor(dev, 0x8a, 0x06, 0xf3, (snow & 0x03) << 2);
else if (dev->decoder == PHILIPS1)
pms_i2c_andor(dev, 0x42, 0x06, 0xf3, (snow & 0x03) << 2);
}
static void pms_sharpness(struct pms *dev, short sharp)
{
if (dev->decoder == PHILIPS2)
pms_i2c_andor(dev, 0x8a, 0x06, 0xfc, sharp & 0x03);
else if (dev->decoder == PHILIPS1)
pms_i2c_andor(dev, 0x42, 0x06, 0xfc, sharp & 0x03);
}
static void pms_chromaagc(struct pms *dev, short agc)
{
if (dev->decoder == PHILIPS2)
pms_i2c_andor(dev, 0x8a, 0x0c, 0x9f, (agc & 0x03) << 5);
else if (dev->decoder == PHILIPS1)
pms_i2c_andor(dev, 0x42, 0x0c, 0x9f, (agc & 0x03) << 5);
}
static void pms_vertnoise(struct pms *dev, short noise)
{
if (dev->decoder == PHILIPS2)
pms_i2c_andor(dev, 0x8a, 0x10, 0xfc, noise & 3);
else if (dev->decoder == PHILIPS1)
pms_i2c_andor(dev, 0x42, 0x10, 0xfc, noise & 3);
}
static void pms_forcecolour(struct pms *dev, short colour)
{
if (dev->decoder == PHILIPS2)
pms_i2c_andor(dev, 0x8a, 0x0c, 0x7f, (colour & 1) << 7);
else if (dev->decoder == PHILIPS1)
pms_i2c_andor(dev, 0x42, 0x0c, 0x7, (colour & 1) << 7);
}
static void pms_antigamma(struct pms *dev, short gamma)
{
if (dev->decoder == PHILIPS2)
pms_i2c_andor(dev, 0xb8, 0x00, 0x7f, (gamma & 1) << 7);
else if (dev->decoder == PHILIPS1)
pms_i2c_andor(dev, 0x42, 0x20, 0x7, (gamma & 1) << 7);
}
static void pms_prefilter(struct pms *dev, short filter)
{
if (dev->decoder == PHILIPS2)
pms_i2c_andor(dev, 0x8a, 0x06, 0xbf, (filter & 1) << 6);
else if (dev->decoder == PHILIPS1)
pms_i2c_andor(dev, 0x42, 0x06, 0xbf, (filter & 1) << 6);
}
static void pms_hfilter(struct pms *dev, short filter)
{
if (dev->decoder == PHILIPS2)
pms_i2c_andor(dev, 0xb8, 0x04, 0x1f, (filter & 7) << 5);
else if (dev->decoder == PHILIPS1)
pms_i2c_andor(dev, 0x42, 0x24, 0x1f, (filter & 7) << 5);
}
static void pms_vfilter(struct pms *dev, short filter)
{
if (dev->decoder == PHILIPS2)
pms_i2c_andor(dev, 0xb8, 0x08, 0x9f, (filter & 3) << 5);
else if (dev->decoder == PHILIPS1)
pms_i2c_andor(dev, 0x42, 0x28, 0x9f, (filter & 3) << 5);
}
static void pms_killcolour(struct pms *dev, short colour)
{
if (dev->decoder == PHILIPS2) {
pms_i2c_andor(dev, 0x8a, 0x08, 0x07, (colour & 0x1f) << 3);
pms_i2c_andor(dev, 0x8a, 0x09, 0x07, (colour & 0x1f) << 3);
} else if (dev->decoder == PHILIPS1) {
pms_i2c_andor(dev, 0x42, 0x08, 0x07, (colour & 0x1f) << 3);
pms_i2c_andor(dev, 0x42, 0x09, 0x07, (colour & 0x1f) << 3);
}
}
static void pms_chromagain(struct pms *dev, short chroma)
{
if (dev->decoder == PHILIPS2)
pms_i2c_write(dev, 0x8a, 0x11, chroma);
else if (dev->decoder == PHILIPS1)
pms_i2c_write(dev, 0x42, 0x11, chroma);
}
static void pms_spacialcompl(struct pms *dev, short data)
{
mvv_write(dev, 0x3b, data);
}
static void pms_spacialcomph(struct pms *dev, short data)
{
mvv_write(dev, 0x3a, data);
}
static void pms_vstart(struct pms *dev, short start)
{
mvv_write(dev, 0x16, start);
mvv_write(dev, 0x17, (start >> 8) & 0x01);
}
#endif
static void pms_secamcross(struct pms *dev, short cross)
{
if (dev->decoder == PHILIPS2)
pms_i2c_andor(dev, 0x8a, 0x0f, 0xdf, (cross & 1) << 5);
else if (dev->decoder == PHILIPS1)
pms_i2c_andor(dev, 0x42, 0x0f, 0xdf, (cross & 1) << 5);
}
static void pms_swsense(struct pms *dev, short sense)
{
if (dev->decoder == PHILIPS2) {
pms_i2c_write(dev, 0x8a, 0x0a, sense);
pms_i2c_write(dev, 0x8a, 0x0b, sense);
} else if (dev->decoder == PHILIPS1) {
pms_i2c_write(dev, 0x42, 0x0a, sense);
pms_i2c_write(dev, 0x42, 0x0b, sense);
}
}
static void pms_framerate(struct pms *dev, short frr)
{
int fps = (dev->std & V4L2_STD_525_60) ? 30 : 25;
if (frr == 0)
return;
fps = fps/frr;
mvv_write(dev, 0x14, 0x80 | fps);
mvv_write(dev, 0x15, 1);
}
static void pms_vert(struct pms *dev, u8 deciden, u8 decinum)
{
mvv_write(dev, 0x1c, deciden); /* Denominator */
mvv_write(dev, 0x1d, decinum); /* Numerator */
}
/*
* Turn 16bit ratios into best small ratio the chipset can grok
*/
static void pms_vertdeci(struct pms *dev, unsigned short decinum, unsigned short deciden)
{
/* Knock it down by / 5 once */
if (decinum % 5 == 0) {
deciden /= 5;
decinum /= 5;
}
/*
* 3's
*/
while (decinum % 3 == 0 && deciden % 3 == 0) {
deciden /= 3;
decinum /= 3;
}
/*
* 2's
*/
while (decinum % 2 == 0 && deciden % 2 == 0) {
decinum /= 2;
deciden /= 2;
}
/*
* Fudgyify
*/
while (deciden > 32) {
deciden /= 2;
decinum = (decinum + 1) / 2;
}
if (deciden == 32)
deciden--;
pms_vert(dev, deciden, decinum);
}
static void pms_horzdeci(struct pms *dev, short decinum, short deciden)
{
if (decinum <= 512) {
if (decinum % 5 == 0) {
decinum /= 5;
deciden /= 5;
}
} else {
decinum = 512;
deciden = 640; /* 768 would be ideal */
}
while (((decinum | deciden) & 1) == 0) {
decinum >>= 1;
deciden >>= 1;
}
while (deciden > 32) {
deciden >>= 1;
decinum = (decinum + 1) >> 1;
}
if (deciden == 32)
deciden--;
mvv_write(dev, 0x24, 0x80 | deciden);
mvv_write(dev, 0x25, decinum);
}
static void pms_resolution(struct pms *dev, short width, short height)
{
int fg_height;
fg_height = height;
if (fg_height > 280)
fg_height = 280;
mvv_write(dev, 0x18, fg_height);
mvv_write(dev, 0x19, fg_height >> 8);
if (dev->std & V4L2_STD_525_60) {
mvv_write(dev, 0x1a, 0xfc);
mvv_write(dev, 0x1b, 0x00);
if (height > fg_height)
pms_vertdeci(dev, 240, 240);
else
pms_vertdeci(dev, fg_height, 240);
} else {
mvv_write(dev, 0x1a, 0x1a);
mvv_write(dev, 0x1b, 0x01);
if (fg_height > 256)
pms_vertdeci(dev, 270, 270);
else
pms_vertdeci(dev, fg_height, 270);
}
mvv_write(dev, 0x12, 0);
mvv_write(dev, 0x13, MVVMEMORYWIDTH);
mvv_write(dev, 0x42, 0x00);
mvv_write(dev, 0x43, 0x00);
mvv_write(dev, 0x44, MVVMEMORYWIDTH);
mvv_write(dev, 0x22, width + 8);
mvv_write(dev, 0x23, (width + 8) >> 8);
if (dev->std & V4L2_STD_525_60)
pms_horzdeci(dev, width, 640);
else
pms_horzdeci(dev, width + 8, 768);
mvv_write(dev, 0x30, mvv_read(dev, 0x30) & 0xfe);
mvv_write(dev, 0x08, mvv_read(dev, 0x08) | 0x01);
mvv_write(dev, 0x01, mvv_read(dev, 0x01) & 0xfd);
mvv_write(dev, 0x32, 0x00);
mvv_write(dev, 0x33, MVVMEMORYWIDTH);
}
/*
* Set Input
*/
static void pms_vcrinput(struct pms *dev, short input)
{
if (dev->decoder == PHILIPS2)
pms_i2c_andor(dev, 0x8a, 0x0d, 0x7f, (input & 1) << 7);
else if (dev->decoder == PHILIPS1)
pms_i2c_andor(dev, 0x42, 0x0d, 0x7f, (input & 1) << 7);
}
static int pms_capture(struct pms *dev, char __user *buf, int rgb555, int count)
{
int y;
int dw = 2 * dev->width;
char *tmp; /* using a temp buffer is faster than direct */
int cnt = 0;
int len = 0;
unsigned char r8 = 0x5; /* value for reg8 */
tmp = kmalloc(dw + 32, GFP_KERNEL);
if (!tmp)
return 0;
if (rgb555)
r8 |= 0x20; /* else use untranslated rgb = 565 */
mvv_write(dev, 0x08, r8); /* capture rgb555/565, init DRAM, PC enable */
/* printf("%d %d %d %d %d %x %x\n",width,height,voff,nom,den,mvv_buf); */
for (y = 0; y < dev->height; y++) {
writeb(0, dev->mem); /* synchronisiert neue Zeile */
/*
* This is in truth a fifo, be very careful as if you
* forgot this odd things will occur 8)
*/
memcpy_fromio(tmp, dev->mem, dw + 32); /* discard 16 word */
cnt -= dev->height;
while (cnt <= 0) {
/*
* Don't copy too far
*/
int dt = dw;
if (dt + len > count)
dt = count - len;
cnt += dev->height;
if (copy_to_user(buf, tmp + 32, dt))
return len ? len : -EFAULT;
buf += dt;
len += dt;
}
}
kfree(tmp);
return len;
}
/*
* Video4linux interfacing
*/
static int pms_querycap(struct file *file, void *priv,
struct v4l2_capability *vcap)
{
struct pms *dev = video_drvdata(file);
strlcpy(vcap->driver, dev->v4l2_dev.name, sizeof(vcap->driver));
strlcpy(vcap->card, "Mediavision PMS", sizeof(vcap->card));
snprintf(vcap->bus_info, sizeof(vcap->bus_info),
"ISA:%s", dev->v4l2_dev.name);
vcap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE;
vcap->capabilities = vcap->device_caps | V4L2_CAP_DEVICE_CAPS;
return 0;
}
static int pms_enum_input(struct file *file, void *fh, struct v4l2_input *vin)
{
static const char *inputs[4] = {
"Composite",
"S-Video",
"Composite (VCR)",
"S-Video (VCR)"
};
if (vin->index > 3)
return -EINVAL;
strlcpy(vin->name, inputs[vin->index], sizeof(vin->name));
vin->type = V4L2_INPUT_TYPE_CAMERA;
vin->audioset = 0;
vin->tuner = 0;
vin->std = V4L2_STD_ALL;
vin->status = 0;
return 0;
}
static int pms_g_input(struct file *file, void *fh, unsigned int *inp)
{
struct pms *dev = video_drvdata(file);
*inp = dev->input;
return 0;
}
static int pms_s_input(struct file *file, void *fh, unsigned int inp)
{
struct pms *dev = video_drvdata(file);
if (inp > 3)
return -EINVAL;
dev->input = inp;
pms_videosource(dev, inp & 1);
pms_vcrinput(dev, inp >> 1);
return 0;
}
static int pms_g_std(struct file *file, void *fh, v4l2_std_id *std)
{
struct pms *dev = video_drvdata(file);
*std = dev->std;
return 0;
}
static int pms_s_std(struct file *file, void *fh, v4l2_std_id std)
{
struct pms *dev = video_drvdata(file);
int ret = 0;
dev->std = std;
if (dev->std & V4L2_STD_NTSC) {
pms_framerate(dev, 30);
pms_secamcross(dev, 0);
pms_format(dev, 1);
} else if (dev->std & V4L2_STD_PAL) {
pms_framerate(dev, 25);
pms_secamcross(dev, 0);
pms_format(dev, 2);
} else if (dev->std & V4L2_STD_SECAM) {
pms_framerate(dev, 25);
pms_secamcross(dev, 1);
pms_format(dev, 2);
} else {
ret = -EINVAL;
}
/*
switch (v->mode) {
case VIDEO_MODE_AUTO:
pms_framerate(dev, 25);
pms_secamcross(dev, 0);
pms_format(dev, 0);
break;
}*/
return ret;
}
static int pms_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct pms *dev = container_of(ctrl->handler, struct pms, hdl);
int ret = 0;
switch (ctrl->id) {
case V4L2_CID_BRIGHTNESS:
pms_brightness(dev, ctrl->val);
break;
case V4L2_CID_CONTRAST:
pms_contrast(dev, ctrl->val);
break;
case V4L2_CID_SATURATION:
pms_saturation(dev, ctrl->val);
break;
case V4L2_CID_HUE:
pms_hue(dev, ctrl->val);
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
static int pms_g_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt)
{
struct pms *dev = video_drvdata(file);
struct v4l2_pix_format *pix = &fmt->fmt.pix;
pix->width = dev->width;
pix->height = dev->height;
pix->pixelformat = dev->width == 15 ?
V4L2_PIX_FMT_RGB555 : V4L2_PIX_FMT_RGB565;
pix->field = V4L2_FIELD_NONE;
pix->bytesperline = 2 * dev->width;
pix->sizeimage = 2 * dev->width * dev->height;
/* Just a guess */
pix->colorspace = V4L2_COLORSPACE_SRGB;
return 0;
}
static int pms_try_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt)
{
struct v4l2_pix_format *pix = &fmt->fmt.pix;
if (pix->height < 16 || pix->height > 480)
return -EINVAL;
if (pix->width < 16 || pix->width > 640)
return -EINVAL;
if (pix->pixelformat != V4L2_PIX_FMT_RGB555 &&
pix->pixelformat != V4L2_PIX_FMT_RGB565)
return -EINVAL;
pix->field = V4L2_FIELD_NONE;
pix->bytesperline = 2 * pix->width;
pix->sizeimage = 2 * pix->width * pix->height;
/* Just a guess */
pix->colorspace = V4L2_COLORSPACE_SRGB;
return 0;
}
static int pms_s_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *fmt)
{
struct pms *dev = video_drvdata(file);
struct v4l2_pix_format *pix = &fmt->fmt.pix;
int ret = pms_try_fmt_vid_cap(file, fh, fmt);
if (ret)
return ret;
dev->width = pix->width;
dev->height = pix->height;
dev->depth = (pix->pixelformat == V4L2_PIX_FMT_RGB555) ? 15 : 16;
pms_resolution(dev, dev->width, dev->height);
/* Ok we figured out what to use from our wide choice */
return 0;
}
static int pms_enum_fmt_vid_cap(struct file *file, void *fh, struct v4l2_fmtdesc *fmt)
{
static struct v4l2_fmtdesc formats[] = {
{ 0, 0, 0,
"RGB 5:5:5", V4L2_PIX_FMT_RGB555,
{ 0, 0, 0, 0 }
},
{ 1, 0, 0,
"RGB 5:6:5", V4L2_PIX_FMT_RGB565,
{ 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 ssize_t pms_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
struct pms *dev = video_drvdata(file);
int len;
len = pms_capture(dev, buf, (dev->depth == 15), count);
return len;
}
static unsigned int pms_poll(struct file *file, struct poll_table_struct *wait)
{
struct v4l2_fh *fh = file->private_data;
unsigned int res = POLLIN | POLLRDNORM;
if (v4l2_event_pending(fh))
res |= POLLPRI;
poll_wait(file, &fh->wait, wait);
return res;
}
static const struct v4l2_file_operations pms_fops = {
.owner = THIS_MODULE,
.open = v4l2_fh_open,
.release = v4l2_fh_release,
.poll = pms_poll,
.unlocked_ioctl = video_ioctl2,
.read = pms_read,
};
static const struct v4l2_ioctl_ops pms_ioctl_ops = {
.vidioc_querycap = pms_querycap,
.vidioc_g_input = pms_g_input,
.vidioc_s_input = pms_s_input,
.vidioc_enum_input = pms_enum_input,
.vidioc_g_std = pms_g_std,
.vidioc_s_std = pms_s_std,
.vidioc_enum_fmt_vid_cap = pms_enum_fmt_vid_cap,
.vidioc_g_fmt_vid_cap = pms_g_fmt_vid_cap,
.vidioc_s_fmt_vid_cap = pms_s_fmt_vid_cap,
.vidioc_try_fmt_vid_cap = pms_try_fmt_vid_cap,
.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
};
/*
* Probe for and initialise the Mediavision PMS
*/
static int init_mediavision(struct pms *dev)
{
int idec, decst;
int i;
static const unsigned char i2c_defs[] = {
0x4c, 0x30, 0x00, 0xe8,
0xb6, 0xe2, 0x00, 0x00,
0xff, 0xff, 0x00, 0x00,
0x00, 0x00, 0x78, 0x98,
0x00, 0x00, 0x00, 0x00,
0x34, 0x0a, 0xf4, 0xce,
0xe4
};
dev->mem = ioremap(mem_base, 0x800);
if (!dev->mem)
return -ENOMEM;
if (!request_region(0x9a01, 1, "Mediavision PMS config")) {
printk(KERN_WARNING "mediavision: unable to detect: 0x9a01 in use.\n");
iounmap(dev->mem);
return -EBUSY;
}
if (!request_region(dev->io, 3, "Mediavision PMS")) {
printk(KERN_WARNING "mediavision: I/O port %d in use.\n", dev->io);
release_region(0x9a01, 1);
iounmap(dev->mem);
return -EBUSY;
}
outb(0xb8, 0x9a01); /* Unlock */
outb(dev->io >> 4, 0x9a01); /* Set IO port */
decst = pms_i2c_stat(dev, 0x43);
if (decst != -1)
idec = 2;
else if (pms_i2c_stat(dev, 0xb9) != -1)
idec = 3;
else if (pms_i2c_stat(dev, 0x8b) != -1)
idec = 1;
else
idec = 0;
printk(KERN_INFO "PMS type is %d\n", idec);
if (idec == 0) {
release_region(dev->io, 3);
release_region(0x9a01, 1);
iounmap(dev->mem);
return -ENODEV;
}
/*
* Ok we have a PMS of some sort
*/
mvv_write(dev, 0x04, mem_base >> 12); /* Set the memory area */
/* Ok now load the defaults */
for (i = 0; i < 0x19; i++) {
if (i2c_defs[i] == 0xff)
pms_i2c_andor(dev, 0x8a, i, 0x07, 0x00);
else
pms_i2c_write(dev, 0x8a, i, i2c_defs[i]);
}
pms_i2c_write(dev, 0xb8, 0x00, 0x12);
pms_i2c_write(dev, 0xb8, 0x04, 0x00);
pms_i2c_write(dev, 0xb8, 0x07, 0x00);
pms_i2c_write(dev, 0xb8, 0x08, 0x00);
pms_i2c_write(dev, 0xb8, 0x09, 0xff);
pms_i2c_write(dev, 0xb8, 0x0a, 0x00);
pms_i2c_write(dev, 0xb8, 0x0b, 0x10);
pms_i2c_write(dev, 0xb8, 0x10, 0x03);
mvv_write(dev, 0x01, 0x00);
mvv_write(dev, 0x05, 0xa0);
mvv_write(dev, 0x08, 0x25);
mvv_write(dev, 0x09, 0x00);
mvv_write(dev, 0x0a, 0x20 | MVVMEMORYWIDTH);
mvv_write(dev, 0x10, 0x02);
mvv_write(dev, 0x1e, 0x0c);
mvv_write(dev, 0x1f, 0x03);
mvv_write(dev, 0x26, 0x06);
mvv_write(dev, 0x2b, 0x00);
mvv_write(dev, 0x2c, 0x20);
mvv_write(dev, 0x2d, 0x00);
mvv_write(dev, 0x2f, 0x70);
mvv_write(dev, 0x32, 0x00);
mvv_write(dev, 0x33, MVVMEMORYWIDTH);
mvv_write(dev, 0x34, 0x00);
mvv_write(dev, 0x35, 0x00);
mvv_write(dev, 0x3a, 0x80);
mvv_write(dev, 0x3b, 0x10);
mvv_write(dev, 0x20, 0x00);
mvv_write(dev, 0x21, 0x00);
mvv_write(dev, 0x30, 0x22);
return 0;
}
/*
* Initialization and module stuff
*/
#ifndef MODULE
static int enable;
module_param(enable, int, 0);
#endif
static const struct v4l2_ctrl_ops pms_ctrl_ops = {
.s_ctrl = pms_s_ctrl,
};
static int pms_probe(struct device *pdev, unsigned int card)
{
struct pms *dev;
struct v4l2_device *v4l2_dev;
struct v4l2_ctrl_handler *hdl;
int res;
#ifndef MODULE
if (!enable) {
pr_err("PMS: not enabled, use pms.enable=1 to probe\n");
return -ENODEV;
}
#endif
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (dev == NULL)
return -ENOMEM;
dev->decoder = PHILIPS2;
dev->io = io_port;
dev->data = io_port + 1;
v4l2_dev = &dev->v4l2_dev;
hdl = &dev->hdl;
res = v4l2_device_register(pdev, v4l2_dev);
if (res < 0) {
v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
goto free_dev;
}
v4l2_info(v4l2_dev, "Mediavision Pro Movie Studio driver 0.05\n");
res = init_mediavision(dev);
if (res) {
v4l2_err(v4l2_dev, "Board not found.\n");
goto free_io;
}
v4l2_ctrl_handler_init(hdl, 4);
v4l2_ctrl_new_std(hdl, &pms_ctrl_ops,
V4L2_CID_BRIGHTNESS, 0, 255, 1, 139);
v4l2_ctrl_new_std(hdl, &pms_ctrl_ops,
V4L2_CID_CONTRAST, 0, 255, 1, 70);
v4l2_ctrl_new_std(hdl, &pms_ctrl_ops,
V4L2_CID_SATURATION, 0, 255, 1, 64);
v4l2_ctrl_new_std(hdl, &pms_ctrl_ops,
V4L2_CID_HUE, 0, 255, 1, 0);
if (hdl->error) {
res = hdl->error;
goto free_hdl;
}
mutex_init(&dev->lock);
strlcpy(dev->vdev.name, v4l2_dev->name, sizeof(dev->vdev.name));
dev->vdev.v4l2_dev = v4l2_dev;
dev->vdev.ctrl_handler = hdl;
dev->vdev.fops = &pms_fops;
dev->vdev.ioctl_ops = &pms_ioctl_ops;
dev->vdev.release = video_device_release_empty;
dev->vdev.lock = &dev->lock;
dev->vdev.tvnorms = V4L2_STD_NTSC | V4L2_STD_PAL | V4L2_STD_SECAM;
video_set_drvdata(&dev->vdev, dev);
dev->std = V4L2_STD_NTSC_M;
dev->height = 240;
dev->width = 320;
dev->depth = 16;
pms_swsense(dev, 75);
pms_resolution(dev, 320, 240);
pms_videosource(dev, 0);
pms_vcrinput(dev, 0);
v4l2_ctrl_handler_setup(hdl);
res = video_register_device(&dev->vdev, VFL_TYPE_GRABBER, video_nr);
if (res >= 0)
return 0;
free_hdl:
v4l2_ctrl_handler_free(hdl);
v4l2_device_unregister(&dev->v4l2_dev);
free_io:
release_region(dev->io, 3);
release_region(0x9a01, 1);
iounmap(dev->mem);
free_dev:
kfree(dev);
return res;
}
static int pms_remove(struct device *pdev, unsigned int card)
{
struct pms *dev = dev_get_drvdata(pdev);
video_unregister_device(&dev->vdev);
v4l2_ctrl_handler_free(&dev->hdl);
release_region(dev->io, 3);
release_region(0x9a01, 1);
iounmap(dev->mem);
return 0;
}
static struct isa_driver pms_driver = {
.probe = pms_probe,
.remove = pms_remove,
.driver = {
.name = "pms",
},
};
static int __init pms_init(void)
{
return isa_register_driver(&pms_driver, 1);
}
static void __exit pms_exit(void)
{
isa_unregister_driver(&pms_driver);
}
module_init(pms_init);
module_exit(pms_exit);
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