saa7111.c
上传用户:jlfgdled
上传日期:2013-04-10
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文件大小:10k
- /*
- saa7111 - Philips SAA7111A video decoder driver version 0.0.3
- Copyright (C) 1998 Dave Perks <dperks@ibm.net>
- Slight changes for video timing and attachment output by
- Wolfgang Scherr <scherr@net4you.net>
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
- #include <linux/module.h>
- #include <linux/init.h>
- #include <linux/delay.h>
- #include <linux/errno.h>
- #include <linux/fs.h>
- #include <linux/kernel.h>
- #include <linux/major.h>
- #include <linux/slab.h>
- #include <linux/mm.h>
- #include <linux/sched.h>
- #include <linux/videodev.h>
- #include <linux/version.h>
- #include <linux/i2c-old.h>
- #include <linux/video_decoder.h>
- #define DEBUG(x) /* Debug driver */
- /* ----------------------------------------------------------------------- */
- struct saa7111 {
- struct i2c_bus *bus;
- int addr;
- unsigned char reg[32];
- int norm;
- int input;
- int enable;
- int bright;
- int contrast;
- int hue;
- int sat;
- };
- #define I2C_SAA7111 0x48
- #define I2C_DELAY 10
- /* ----------------------------------------------------------------------- */
- static int saa7111_write(struct saa7111 *dev, unsigned char subaddr,
- unsigned char data)
- {
- int ack;
- LOCK_I2C_BUS(dev->bus);
- i2c_start(dev->bus);
- i2c_sendbyte(dev->bus, dev->addr, I2C_DELAY);
- i2c_sendbyte(dev->bus, subaddr, I2C_DELAY);
- ack = i2c_sendbyte(dev->bus, data, I2C_DELAY);
- dev->reg[subaddr] = data;
- i2c_stop(dev->bus);
- UNLOCK_I2C_BUS(dev->bus);
- return ack;
- }
- static int saa7111_write_block(struct saa7111 *dev,
- unsigned const char *data, unsigned int len)
- {
- int ack = -1;
- unsigned subaddr;
- while (len > 1) {
- LOCK_I2C_BUS(dev->bus);
- i2c_start(dev->bus);
- i2c_sendbyte(dev->bus, dev->addr, I2C_DELAY);
- ack = i2c_sendbyte(dev->bus, (subaddr = *data++), I2C_DELAY);
- ack = i2c_sendbyte(dev->bus, (dev->reg[subaddr] = *data++), I2C_DELAY);
- len -= 2;
- while (len > 1 && *data == ++subaddr) {
- data++;
- ack =
- i2c_sendbyte(dev->bus,
- (dev->reg[subaddr] =
- *data++), I2C_DELAY);
- len -= 2;
- }
- i2c_stop(dev->bus);
- UNLOCK_I2C_BUS(dev->bus);
- }
- return ack;
- }
- static int saa7111_read(struct saa7111 *dev, unsigned char subaddr)
- {
- int data;
- LOCK_I2C_BUS(dev->bus);
- i2c_start(dev->bus);
- i2c_sendbyte(dev->bus, dev->addr, I2C_DELAY);
- i2c_sendbyte(dev->bus, subaddr, I2C_DELAY);
- i2c_start(dev->bus);
- i2c_sendbyte(dev->bus, dev->addr | 1, I2C_DELAY);
- data = i2c_readbyte(dev->bus, 1);
- i2c_stop(dev->bus);
- UNLOCK_I2C_BUS(dev->bus);
- return data;
- }
- /* ----------------------------------------------------------------------- */
- static int saa7111_attach(struct i2c_device *device)
- {
- int i;
- struct saa7111 *decoder;
- static const unsigned char init[] = {
- 0x00, 0x00, /* 00 - ID byte */
- 0x01, 0x00, /* 01 - reserved */
- /*front end */
- 0x02, 0xd0, /* 02 - FUSE=3, GUDL=2, MODE=0 */
- 0x03, 0x23, /* 03 - HLNRS=0, VBSL=1, WPOFF=0, HOLDG=0, GAFIX=0, GAI1=256, GAI2=256 */
- 0x04, 0x00, /* 04 - GAI1=256 */
- 0x05, 0x00, /* 05 - GAI2=256 */
- /* decoder */
- 0x06, 0xf3, /* 06 - HSB at 13(50Hz) / 17(60Hz) pixels after end of last line */
- 0x07, 0x13, /* 07 - HSS at 113(50Hz) / 117(60Hz) pixels after end of last line */
- 0x08, 0xc8, /* 08 - AUFD=1, FSEL=1, EXFIL=0, VTRC=1, HPLL=0, VNOI=0 */
- 0x09, 0x01, /* 09 - BYPS=0, PREF=0, BPSS=0, VBLB=0, UPTCV=0, APER=1 */
- 0x0a, 0x80, /* 0a - BRIG=128 */
- 0x0b, 0x47, /* 0b - CONT=1.109 */
- 0x0c, 0x40, /* 0c - SATN=1.0 */
- 0x0d, 0x00, /* 0d - HUE=0 */
- 0x0e, 0x01, /* 0e - CDTO=0, CSTD=0, DCCF=0, FCTC=0, CHBW=1 */
- 0x0f, 0x00, /* 0f - reserved */
- 0x10, 0x48, /* 10 - OFTS=1, HDEL=0, VRLN=1, YDEL=0 */
- 0x11, 0x1c, /* 11 - GPSW=0, CM99=0, FECO=0, COMPO=1, OEYC=1, OEHV=1, VIPB=0, COLO=0 */
- 0x12, 0x00, /* 12 - output control 2 */
- 0x13, 0x00, /* 13 - output control 3 */
- 0x14, 0x00, /* 14 - reserved */
- 0x15, 0x00, /* 15 - VBI */
- 0x16, 0x00, /* 16 - VBI */
- 0x17, 0x00, /* 17 - VBI */
- };
- MOD_INC_USE_COUNT;
- device->data = decoder = kmalloc(sizeof(struct saa7111), GFP_KERNEL);
- if (decoder == NULL)
- {
- MOD_DEC_USE_COUNT;
- return -ENOMEM;
- }
- memset(decoder, 0, sizeof(struct saa7111));
- strcpy(device->name, "saa7111");
- decoder->bus = device->bus;
- decoder->addr = device->addr;
- decoder->norm = VIDEO_MODE_NTSC;
- decoder->input = 0;
- decoder->enable = 1;
- decoder->bright = 32768;
- decoder->contrast = 32768;
- decoder->hue = 32768;
- decoder->sat = 32768;
- i = saa7111_write_block(decoder, init, sizeof(init));
- if (i < 0) {
- printk(KERN_ERR "%s_attach: init status %dn",
- device->name, i);
- } else {
- printk(KERN_INFO "%s_attach: chip version %xn",
- device->name, saa7111_read(decoder, 0x00) >> 4);
- }
- return 0;
- }
- static int saa7111_detach(struct i2c_device *device)
- {
- kfree(device->data);
- MOD_DEC_USE_COUNT;
- return 0;
- }
- static int saa7111_command(struct i2c_device *device, unsigned int cmd,
- void *arg)
- {
- struct saa7111 *decoder = device->data;
- switch (cmd) {
- #if defined(DECODER_DUMP)
- case DECODER_DUMP:
- {
- int i;
- for (i = 0; i < 32; i += 16) {
- int j;
- printk("KERN_DEBUG %s: %03x", device->name,
- i);
- for (j = 0; j < 16; ++j) {
- printk(" %02x",
- saa7111_read(decoder,
- i + j));
- }
- printk("n");
- }
- }
- break;
- #endif /* defined(DECODER_DUMP) */
- case DECODER_GET_CAPABILITIES:
- {
- struct video_decoder_capability *cap = arg;
- cap->flags
- = VIDEO_DECODER_PAL
- | VIDEO_DECODER_NTSC
- | VIDEO_DECODER_AUTO | VIDEO_DECODER_CCIR;
- cap->inputs = 8;
- cap->outputs = 1;
- }
- break;
- case DECODER_GET_STATUS:
- {
- int *iarg = arg;
- int status;
- int res;
- status = saa7111_read(decoder, 0x1f);
- res = 0;
- if ((status & (1 << 6)) == 0) {
- res |= DECODER_STATUS_GOOD;
- }
- switch (decoder->norm) {
- case VIDEO_MODE_NTSC:
- res |= DECODER_STATUS_NTSC;
- break;
- case VIDEO_MODE_PAL:
- res |= DECODER_STATUS_PAL;
- break;
- default:
- case VIDEO_MODE_AUTO:
- if ((status & (1 << 5)) != 0) {
- res |= DECODER_STATUS_NTSC;
- } else {
- res |= DECODER_STATUS_PAL;
- }
- break;
- }
- if ((status & (1 << 0)) != 0) {
- res |= DECODER_STATUS_COLOR;
- }
- *iarg = res;
- }
- break;
- case DECODER_SET_NORM:
- {
- int *iarg = arg;
- switch (*iarg) {
- case VIDEO_MODE_NTSC:
- saa7111_write(decoder, 0x08,
- (decoder->
- reg[0x08] & 0x3f) | 0x40);
- break;
- case VIDEO_MODE_PAL:
- saa7111_write(decoder, 0x08,
- (decoder->
- reg[0x08] & 0x3f) | 0x00);
- break;
- case VIDEO_MODE_AUTO:
- saa7111_write(decoder, 0x08,
- (decoder->
- reg[0x08] & 0x3f) | 0x80);
- break;
- default:
- return -EINVAL;
- }
- decoder->norm = *iarg;
- }
- break;
- case DECODER_SET_INPUT:
- {
- int *iarg = arg;
- if (*iarg < 0 || *iarg > 7) {
- return -EINVAL;
- }
- if (decoder->input != *iarg) {
- decoder->input = *iarg;
- /* select mode */
- saa7111_write(decoder, 0x02,
- (decoder->
- reg[0x02] & 0xf8) |
- decoder->input);
- /* bypass chrominance trap for modes 4..7 */
- saa7111_write(decoder, 0x09,
- (decoder->
- reg[0x09] & 0x7f) |
- ((decoder->input >
- 3) ? 0x80 : 0));
- }
- }
- break;
- case DECODER_SET_OUTPUT:
- {
- int *iarg = arg;
- /* not much choice of outputs */
- if (*iarg != 0) {
- return -EINVAL;
- }
- }
- break;
- case DECODER_ENABLE_OUTPUT:
- {
- int *iarg = arg;
- int enable = (*iarg != 0);
- if (decoder->enable != enable) {
- decoder->enable = enable;
- // RJ: If output should be disabled (for playing videos), we also need a open PLL.
- // The input is set to 0 (where no input source is connected), although this
- // is not necessary.
- //
- // If output should be enabled, we have to reverse the above.
- if (decoder->enable) {
- saa7111_write(decoder, 0x02,
- (decoder->
- reg[0x02] & 0xf8) |
- decoder->input);
- saa7111_write(decoder, 0x08,
- (decoder->
- reg[0x08] & 0xfb));
- saa7111_write(decoder, 0x11,
- (decoder->
- reg[0x11] & 0xf3) |
- 0x0c);
- } else {
- saa7111_write(decoder, 0x02,
- (decoder->
- reg[0x02] & 0xf8));
- saa7111_write(decoder, 0x08,
- (decoder->
- reg[0x08] & 0xfb) |
- 0x04);
- saa7111_write(decoder, 0x11,
- (decoder->
- reg[0x11] & 0xf3));
- }
- }
- }
- break;
- case DECODER_SET_PICTURE:
- {
- struct video_picture *pic = arg;
- if (decoder->bright != pic->brightness) {
- /* We want 0 to 255 we get 0-65535 */
- decoder->bright = pic->brightness;
- saa7111_write(decoder, 0x0a,
- decoder->bright >> 8);
- }
- if (decoder->contrast != pic->contrast) {
- /* We want 0 to 127 we get 0-65535 */
- decoder->contrast = pic->contrast;
- saa7111_write(decoder, 0x0b,
- decoder->contrast >> 9);
- }
- if (decoder->sat != pic->colour) {
- /* We want 0 to 127 we get 0-65535 */
- decoder->sat = pic->colour;
- saa7111_write(decoder, 0x0c,
- decoder->sat >> 9);
- }
- if (decoder->hue != pic->hue) {
- /* We want -128 to 127 we get 0-65535 */
- decoder->hue = pic->hue;
- saa7111_write(decoder, 0x0d,
- (decoder->hue - 32768) >> 8);
- }
- }
- break;
- default:
- return -EINVAL;
- }
- return 0;
- }
- /* ----------------------------------------------------------------------- */
- static struct i2c_driver i2c_driver_saa7111 = {
- "saa7111", /* name */
- I2C_DRIVERID_VIDEODECODER, /* ID */
- I2C_SAA7111, I2C_SAA7111 + 1,
- saa7111_attach,
- saa7111_detach,
- saa7111_command
- };
- EXPORT_NO_SYMBOLS;
- static int saa7111_init(void)
- {
- return i2c_register_driver(&i2c_driver_saa7111);
- }
- static void saa7111_exit(void)
- {
- i2c_unregister_driver(&i2c_driver_saa7111);
- }
- module_init(saa7111_init);
- module_exit(saa7111_exit);
- MODULE_LICENSE("GPL");