bt819.c
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上传日期:2013-02-24
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文件大小:12k
- /*
- bt819 - BT819A VideoStream Decoder (Rockwell Part)
- Copyright (C) 1999 Mike Bernson <mike@mlb.org>
- Copyright (C) 1998 Dave Perks <dperks@ibm.net>
- Modifications for LML33/DC10plus unified driver
- Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
-
- This code was modify/ported from the saa7111 driver written
- by Dave Perks.
- 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/slab.h>
- #include <linux/mm.h>
- #include <linux/pci.h>
- #include <linux/signal.h>
- #include <linux/sched.h>
- #include <linux/videodev.h>
- #include <linux/i2c-old.h>
- #include <linux/video_decoder.h>
- #define DEBUG(x) x /* Debug driver */
- /* ----------------------------------------------------------------------- */
- struct bt819 {
- struct i2c_bus *bus;
- int addr;
- unsigned char reg[32];
- int initialized;
- int norm;
- int input;
- int enable;
- int bright;
- int contrast;
- int hue;
- int sat;
- };
- struct timing {
- int hactive;
- int hdelay;
- int vactive;
- int vdelay;
- int hscale;
- int vscale;
- };
- struct timing timing_data[] = {
- {864 - 24, 2, 623, 1, 0x0504, 0x0000},
- {858 - 24, 2, 523, 1, 0x00f8, 0x0000},
- // { 858-68, 64, 523, 1, 0x00f8, 0x0000 },
- };
- #define I2C_BT819 0x8a
- #define I2C_DELAY 10
- /* ----------------------------------------------------------------------- */
- static int bt819_write(struct bt819 *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 bt819_setbit(struct bt819 *dev, int subaddr, int bit, int data)
- {
- return bt819_write(dev, subaddr, (dev->reg[subaddr] & ~(1 << bit)) | (data ? (1 << bit) : 0));
- }
- static int bt819_write_block(struct bt819 *dev, unsigned const char *data,
- unsigned int len)
- {
- int ack;
- unsigned subaddr;
- ack = 0;
- 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 bt819_read(struct bt819 *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 bt819_init(struct i2c_device *device)
- {
- struct bt819 *decoder;
- static unsigned char init[] = {
- //0x1f, 0x00, /* Reset */
- 0x01, 0x59, /* 0x01 input format */
- 0x02, 0x00, /* 0x02 temporal decimation */
- 0x03, 0x12, /* 0x03 Cropping msb */
- 0x04, 0x16, /* 0x04 Vertical Delay, lsb */
- 0x05, 0xe0, /* 0x05 Vertical Active lsb */
- 0x06, 0x80, /* 0x06 Horizontal Delay lsb */
- 0x07, 0xd0, /* 0x07 Horizontal Active lsb */
- 0x08, 0x00, /* 0x08 Horizontal Scaling msb */
- 0x09, 0xf8, /* 0x09 Horizontal Scaling lsb */
- 0x0a, 0x00, /* 0x0a Brightness control */
- 0x0b, 0x30, /* 0x0b Miscellaneous control */
- 0x0c, 0xd8, /* 0x0c Luma Gain lsb */
- 0x0d, 0xfe, /* 0x0d Chroma Gain (U) lsb */
- 0x0e, 0xb4, /* 0x0e Chroma Gain (V) msb */
- 0x0f, 0x00, /* 0x0f Hue control */
- 0x12, 0x04, /* 0x12 Output Format */
- 0x13, 0x20, /* 0x13 Vertial Scaling msb 0x60, */
- 0x14, 0x00, /* 0x14 Vertial Scaling lsb */
- 0x16, 0x04, /* 0x16 Video Timing Polarity 0x02, */
- 0x18, 0x68, /* 0x18 AGC Delay */
- 0x19, 0x5d, /* 0x19 Burst Gate Delay */
- 0x1a, 0x80, /* 0x1a ADC Interface */
- };
- struct timing *timing;
- decoder = device->data;
- timing = &timing_data[decoder->norm];
- init[3 * 2 - 1] = (((timing->vdelay >> 8) & 0x03) << 6) |
- (((timing->vactive >> 8) & 0x03) << 4) |
- (((timing->hdelay >> 8) & 0x03) << 2) |
- ((timing->hactive >> 8) & 0x03);
- init[4 * 2 - 1] = timing->vdelay & 0xff;
- init[5 * 2 - 1] = timing->vactive & 0xff;
- init[6 * 2 - 1] = timing->hdelay & 0xff;
- init[7 * 2 - 1] = timing->hactive & 0xff;
- init[8 * 2 - 1] = timing->hscale >> 8;
- init[9 * 2 - 1] = timing->hscale & 0xff;
- bt819_write(decoder, 0x1f, 0x00);
- mdelay(1);
- return bt819_write_block(decoder, init, sizeof(init));
- }
- /* ----------------------------------------------------------------------- */
- static int bt819_attach(struct i2c_device *device)
- {
- int i;
- struct bt819 *decoder;
- MOD_INC_USE_COUNT;
- device->data = decoder = kmalloc(sizeof(struct bt819), GFP_KERNEL);
- if (decoder == NULL) {
- MOD_DEC_USE_COUNT;
- return -ENOMEM;
- }
- memset(decoder, 0, sizeof(struct bt819));
- strcpy(device->name, "bt819");
- 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;
- decoder->initialized = 0;
- i = bt819_init(device);
- if (i < 0) {
- printk(KERN_ERR "%s: bt819_attach: init status %dn",
- decoder->bus->name, i);
- } else {
- printk(KERN_INFO "%s: bt819_attach: chip version %xn",
- decoder->bus->name, bt819_read(decoder,
- 0x17) & 0x0f);
- }
- return 0;
- }
- static int bt819_detach(struct i2c_device *device)
- {
- kfree(device->data);
- MOD_DEC_USE_COUNT;
- return 0;
- }
- static int bt819_command(struct i2c_device *device, unsigned int cmd, void *arg)
- {
- int temp;
- struct bt819 *decoder = device->data;
- //return 0;
- if (!decoder->initialized) { // First call to bt819_init could be
- bt819_init(device); // without #FRST = 0
- decoder->initialized = 1;
- }
- switch (cmd) {
- case DECODER_GET_CAPABILITIES:
- {
- struct video_decoder_capability *cap = arg;
- cap->flags
- = VIDEO_DECODER_PAL
- | VIDEO_DECODER_NTSC | VIDEO_DECODER_CCIR;
- cap->inputs = 8;
- cap->outputs = 1;
- }
- break;
- case DECODER_GET_STATUS:
- {
- int *iarg = arg;
- int status;
- int res;
- status = bt819_read(decoder, 0x00);
- res = 0;
- if ((status & 0x80)) {
- 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 & 0x10)) {
- res |= DECODER_STATUS_PAL;
- } else {
- res |= DECODER_STATUS_NTSC;
- }
- break;
- }
- res |= DECODER_STATUS_COLOR;
- *iarg = res;
- DEBUG(printk(KERN_INFO "%s-bt819: get status %xn",
- decoder->bus->name, *iarg));
- }
- break;
- case DECODER_SET_NORM:
- {
- int *iarg = arg;
- struct timing *timing;
- DEBUG(printk(KERN_INFO "%s-bt819: set norm %xn",
- decoder->bus->name, *iarg));
- if (*iarg == VIDEO_MODE_NTSC) {
- bt819_setbit(decoder, 0x01, 0, 1);
- bt819_setbit(decoder, 0x01, 1, 0);
- bt819_write(decoder, 0x18, 0x68);
- bt819_write(decoder, 0x19, 0x5d);
- //bt819_setbit(decoder, 0x1a, 5, 1);
- timing = &timing_data[VIDEO_MODE_NTSC];
- } else {
- bt819_setbit(decoder, 0x01, 0, 1);
- bt819_setbit(decoder, 0x01, 1, 1);
- bt819_write(decoder, 0x18, 0x7f);
- bt819_write(decoder, 0x19, 0x72);
- //bt819_setbit(decoder, 0x1a, 5, 0);
- timing = &timing_data[VIDEO_MODE_PAL];
- }
- bt819_write(decoder, 0x03,
- (((timing->vdelay >> 8) & 0x03) << 6) |
- (((timing->
- vactive >> 8) & 0x03) << 4) |
- (((timing->
- hdelay >> 8) & 0x03) << 2) |
- ((timing->hactive >> 8) & 0x03));
- bt819_write(decoder, 0x04, timing->vdelay & 0xff);
- bt819_write(decoder, 0x05, timing->vactive & 0xff);
- bt819_write(decoder, 0x06, timing->hdelay & 0xff);
- bt819_write(decoder, 0x07, timing->hactive & 0xff);
- bt819_write(decoder, 0x08, timing->hscale >> 8);
- bt819_write(decoder, 0x09, timing->hscale & 0xff);
- decoder->norm = *iarg;
- }
- break;
- case DECODER_SET_INPUT:
- {
- int *iarg = arg;
- DEBUG(printk(KERN_INFO "%s-bt819: set input %xn",
- decoder->bus->name, *iarg));
- if (*iarg < 0 || *iarg > 7) {
- return -EINVAL;
- }
- if (decoder->input != *iarg) {
- decoder->input = *iarg;
- /* select mode */
- if (decoder->input == 0) {
- bt819_setbit(decoder, 0x0b, 6, 0);
- bt819_setbit(decoder, 0x1a, 1, 1);
- } else {
- bt819_setbit(decoder, 0x0b, 6, 1);
- bt819_setbit(decoder, 0x1a, 1, 0);
- }
- }
- }
- break;
- case DECODER_SET_OUTPUT:
- {
- int *iarg = arg;
- DEBUG(printk(KERN_INFO "%s-bt819: set output %xn",
- decoder->bus->name, *iarg));
- /* not much choice of outputs */
- if (*iarg != 0) {
- return -EINVAL;
- }
- }
- break;
- case DECODER_ENABLE_OUTPUT:
- {
- int *iarg = arg;
- int enable = (*iarg != 0);
- DEBUG(printk
- (KERN_INFO "%s-bt819: enable output %xn",
- decoder->bus->name, *iarg));
- if (decoder->enable != enable) {
- decoder->enable = enable;
- if (decoder->enable) {
- bt819_setbit(decoder, 0x16, 7, 0);
- } else {
- bt819_setbit(decoder, 0x16, 7, 1);
- }
- }
- }
- break;
- case DECODER_SET_PICTURE:
- {
- struct video_picture *pic = arg;
- DEBUG(printk
- (KERN_INFO
- "%s-bt819: set picture brightness %d contrast %d colour %dn",
- decoder->bus->name, pic->brightness,
- pic->contrast, pic->colour));
- if (decoder->bright != pic->brightness) {
- /* We want -128 to 127 we get 0-65535 */
- decoder->bright = pic->brightness;
- bt819_write(decoder, 0x0a,
- (decoder->bright >> 8) - 128);
- }
- if (decoder->contrast != pic->contrast) {
- /* We want 0 to 511 we get 0-65535 */
- decoder->contrast = pic->contrast;
- bt819_write(decoder, 0x0c,
- (decoder->
- contrast >> 7) & 0xff);
- bt819_setbit(decoder, 0x0b, 2,
- ((decoder->
- contrast >> 15) & 0x01));
- }
- if (decoder->sat != pic->colour) {
- /* We want 0 to 511 we get 0-65535 */
- decoder->sat = pic->colour;
- bt819_write(decoder, 0x0d,
- (decoder->sat >> 7) & 0xff);
- bt819_setbit(decoder, 0x0b, 1,
- ((decoder->
- sat >> 15) & 0x01));
- temp = (decoder->sat * 201) / 237;
- bt819_write(decoder, 0x0e,
- (temp >> 7) & 0xff);
- bt819_setbit(decoder, 0x0b, 0,
- (temp >> 15) & 0x01);
- }
- if (decoder->hue != pic->hue) {
- /* We want -128 to 127 we get 0-65535 */
- decoder->hue = pic->hue;
- bt819_write(decoder, 0x0f,
- 128 - (decoder->hue >> 8));
- }
- }
- break;
- default:
- return -EINVAL;
- }
- return 0;
- }
- /* ----------------------------------------------------------------------- */
- static struct i2c_driver i2c_driver_bt819 = {
- "bt819", /* name */
- I2C_DRIVERID_VIDEODECODER, /* ID */
- I2C_BT819, I2C_BT819 + 1,
- bt819_attach,
- bt819_detach,
- bt819_command
- };
- EXPORT_NO_SYMBOLS;
- static int bt819_setup(void)
- {
- return i2c_register_driver(&i2c_driver_bt819);
- }
- static void bt819_exit(void)
- {
- i2c_unregister_driver(&i2c_driver_bt819);
- }
- module_init(bt819_setup);
- module_exit(bt819_exit);
- MODULE_LICENSE("GPL");