647 lines
15 KiB
C
647 lines
15 KiB
C
/*
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* bt819 - BT819A VideoStream Decoder (Rockwell Part)
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*
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* Copyright (C) 1999 Mike Bernson <mike@mlb.org>
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* Copyright (C) 1998 Dave Perks <dperks@ibm.net>
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*
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* Modifications for LML33/DC10plus unified driver
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* Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
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*
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* Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
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* - moved over to linux>=2.4.x i2c protocol (9/9/2002)
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*
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* This code was modify/ported from the saa7111 driver written
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* by Dave Perks.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/errno.h>
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#include <linux/fs.h>
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#include <linux/kernel.h>
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#include <linux/major.h>
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#include <linux/slab.h>
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#include <linux/mm.h>
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#include <linux/pci.h>
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#include <linux/signal.h>
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#include <asm/io.h>
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#include <asm/pgtable.h>
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#include <asm/page.h>
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#include <linux/sched.h>
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#include <linux/types.h>
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#include <linux/videodev.h>
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#include <asm/uaccess.h>
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MODULE_DESCRIPTION("Brooktree-819 video decoder driver");
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MODULE_AUTHOR("Mike Bernson & Dave Perks");
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MODULE_LICENSE("GPL");
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#include <linux/i2c.h>
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#include <linux/i2c-dev.h>
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#define I2C_NAME(s) (s)->name
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#include <linux/video_decoder.h>
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static int debug = 0;
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module_param(debug, int, 0);
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MODULE_PARM_DESC(debug, "Debug level (0-1)");
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#define dprintk(num, format, args...) \
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do { \
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if (debug >= num) \
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printk(format, ##args); \
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} while (0)
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/* ----------------------------------------------------------------------- */
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struct bt819 {
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unsigned char reg[32];
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int initialized;
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int norm;
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int input;
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int enable;
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int bright;
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int contrast;
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int hue;
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int sat;
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};
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struct timing {
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int hactive;
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int hdelay;
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int vactive;
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int vdelay;
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int hscale;
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int vscale;
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};
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/* for values, see the bt819 datasheet */
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static struct timing timing_data[] = {
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{864 - 24, 20, 625 - 2, 1, 0x0504, 0x0000},
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{858 - 24, 20, 525 - 2, 1, 0x00f8, 0x0000},
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};
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#define I2C_BT819 0x8a
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/* ----------------------------------------------------------------------- */
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static inline int
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bt819_write (struct i2c_client *client,
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u8 reg,
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u8 value)
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{
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struct bt819 *decoder = i2c_get_clientdata(client);
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decoder->reg[reg] = value;
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return i2c_smbus_write_byte_data(client, reg, value);
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}
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static inline int
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bt819_setbit (struct i2c_client *client,
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u8 reg,
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u8 bit,
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u8 value)
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{
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struct bt819 *decoder = i2c_get_clientdata(client);
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return bt819_write(client, reg,
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(decoder->
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reg[reg] & ~(1 << bit)) |
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(value ? (1 << bit) : 0));
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}
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static int
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bt819_write_block (struct i2c_client *client,
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const u8 *data,
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unsigned int len)
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{
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int ret = -1;
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u8 reg;
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/* the bt819 has an autoincrement function, use it if
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* the adapter understands raw I2C */
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if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
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/* do raw I2C, not smbus compatible */
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struct bt819 *decoder = i2c_get_clientdata(client);
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struct i2c_msg msg;
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u8 block_data[32];
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msg.addr = client->addr;
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msg.flags = 0;
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while (len >= 2) {
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msg.buf = (char *) block_data;
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msg.len = 0;
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block_data[msg.len++] = reg = data[0];
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do {
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block_data[msg.len++] =
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decoder->reg[reg++] = data[1];
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len -= 2;
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data += 2;
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} while (len >= 2 && data[0] == reg &&
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msg.len < 32);
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if ((ret = i2c_transfer(client->adapter,
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&msg, 1)) < 0)
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break;
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}
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} else {
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/* do some slow I2C emulation kind of thing */
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while (len >= 2) {
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reg = *data++;
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if ((ret = bt819_write(client, reg, *data++)) < 0)
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break;
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len -= 2;
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}
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}
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return ret;
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}
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static inline int
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bt819_read (struct i2c_client *client,
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u8 reg)
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{
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return i2c_smbus_read_byte_data(client, reg);
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}
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static int
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bt819_init (struct i2c_client *client)
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{
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struct bt819 *decoder = i2c_get_clientdata(client);
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static unsigned char init[] = {
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//0x1f, 0x00, /* Reset */
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0x01, 0x59, /* 0x01 input format */
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0x02, 0x00, /* 0x02 temporal decimation */
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0x03, 0x12, /* 0x03 Cropping msb */
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0x04, 0x16, /* 0x04 Vertical Delay, lsb */
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0x05, 0xe0, /* 0x05 Vertical Active lsb */
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0x06, 0x80, /* 0x06 Horizontal Delay lsb */
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0x07, 0xd0, /* 0x07 Horizontal Active lsb */
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0x08, 0x00, /* 0x08 Horizontal Scaling msb */
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0x09, 0xf8, /* 0x09 Horizontal Scaling lsb */
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0x0a, 0x00, /* 0x0a Brightness control */
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0x0b, 0x30, /* 0x0b Miscellaneous control */
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0x0c, 0xd8, /* 0x0c Luma Gain lsb */
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0x0d, 0xfe, /* 0x0d Chroma Gain (U) lsb */
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0x0e, 0xb4, /* 0x0e Chroma Gain (V) msb */
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0x0f, 0x00, /* 0x0f Hue control */
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0x12, 0x04, /* 0x12 Output Format */
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0x13, 0x20, /* 0x13 Vertial Scaling msb 0x00
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chroma comb OFF, line drop scaling, interlace scaling
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BUG? Why does turning the chroma comb on fuck up color?
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Bug in the bt819 stepping on my board?
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*/
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0x14, 0x00, /* 0x14 Vertial Scaling lsb */
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0x16, 0x07, /* 0x16 Video Timing Polarity
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ACTIVE=active low
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FIELD: high=odd,
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vreset=active high,
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hreset=active high */
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0x18, 0x68, /* 0x18 AGC Delay */
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0x19, 0x5d, /* 0x19 Burst Gate Delay */
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0x1a, 0x80, /* 0x1a ADC Interface */
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};
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struct timing *timing = &timing_data[decoder->norm];
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init[0x03 * 2 - 1] =
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(((timing->vdelay >> 8) & 0x03) << 6) | (((timing->
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vactive >> 8) &
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0x03) << 4) |
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(((timing->hdelay >> 8) & 0x03) << 2) | ((timing->
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hactive >> 8) &
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0x03);
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init[0x04 * 2 - 1] = timing->vdelay & 0xff;
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init[0x05 * 2 - 1] = timing->vactive & 0xff;
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init[0x06 * 2 - 1] = timing->hdelay & 0xff;
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init[0x07 * 2 - 1] = timing->hactive & 0xff;
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init[0x08 * 2 - 1] = timing->hscale >> 8;
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init[0x09 * 2 - 1] = timing->hscale & 0xff;
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/* 0x15 in array is address 0x19 */
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init[0x15 * 2 - 1] = (decoder->norm == 0) ? 115 : 93; /* Chroma burst delay */
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/* reset */
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bt819_write(client, 0x1f, 0x00);
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mdelay(1);
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/* init */
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return bt819_write_block(client, init, sizeof(init));
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}
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/* ----------------------------------------------------------------------- */
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static int
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bt819_command (struct i2c_client *client,
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unsigned int cmd,
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void *arg)
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{
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int temp;
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struct bt819 *decoder = i2c_get_clientdata(client);
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if (!decoder->initialized) { // First call to bt819_init could be
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bt819_init(client); // without #FRST = 0
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decoder->initialized = 1;
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}
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switch (cmd) {
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case 0:
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/* This is just for testing!!! */
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bt819_init(client);
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break;
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case DECODER_GET_CAPABILITIES:
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{
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struct video_decoder_capability *cap = arg;
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cap->flags = VIDEO_DECODER_PAL |
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VIDEO_DECODER_NTSC |
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VIDEO_DECODER_AUTO |
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VIDEO_DECODER_CCIR;
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cap->inputs = 8;
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cap->outputs = 1;
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}
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break;
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case DECODER_GET_STATUS:
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{
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int *iarg = arg;
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int status;
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int res;
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status = bt819_read(client, 0x00);
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res = 0;
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if ((status & 0x80)) {
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res |= DECODER_STATUS_GOOD;
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}
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switch (decoder->norm) {
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case VIDEO_MODE_NTSC:
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res |= DECODER_STATUS_NTSC;
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break;
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case VIDEO_MODE_PAL:
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res |= DECODER_STATUS_PAL;
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break;
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default:
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case VIDEO_MODE_AUTO:
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if ((status & 0x10)) {
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res |= DECODER_STATUS_PAL;
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} else {
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res |= DECODER_STATUS_NTSC;
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}
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break;
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}
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res |= DECODER_STATUS_COLOR;
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*iarg = res;
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dprintk(1, KERN_INFO "%s: get status %x\n", I2C_NAME(client),
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*iarg);
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}
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break;
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case DECODER_SET_NORM:
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{
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int *iarg = arg;
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struct timing *timing = NULL;
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dprintk(1, KERN_INFO "%s: set norm %x\n", I2C_NAME(client),
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*iarg);
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switch (*iarg) {
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case VIDEO_MODE_NTSC:
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bt819_setbit(client, 0x01, 0, 1);
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bt819_setbit(client, 0x01, 1, 0);
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bt819_setbit(client, 0x01, 5, 0);
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bt819_write(client, 0x18, 0x68);
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bt819_write(client, 0x19, 0x5d);
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//bt819_setbit(client, 0x1a, 5, 1);
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timing = &timing_data[VIDEO_MODE_NTSC];
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break;
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case VIDEO_MODE_PAL:
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bt819_setbit(client, 0x01, 0, 1);
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bt819_setbit(client, 0x01, 1, 1);
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bt819_setbit(client, 0x01, 5, 1);
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bt819_write(client, 0x18, 0x7f);
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bt819_write(client, 0x19, 0x72);
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//bt819_setbit(client, 0x1a, 5, 0);
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timing = &timing_data[VIDEO_MODE_PAL];
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break;
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case VIDEO_MODE_AUTO:
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bt819_setbit(client, 0x01, 0, 0);
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bt819_setbit(client, 0x01, 1, 0);
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break;
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default:
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dprintk(1,
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KERN_ERR
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"%s: unsupported norm %d\n",
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I2C_NAME(client), *iarg);
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return -EINVAL;
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}
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if (timing) {
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bt819_write(client, 0x03,
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(((timing->vdelay >> 8) & 0x03) << 6) |
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(((timing->vactive >> 8) & 0x03) << 4) |
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(((timing->hdelay >> 8) & 0x03) << 2) |
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((timing->hactive >> 8) & 0x03) );
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bt819_write(client, 0x04, timing->vdelay & 0xff);
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bt819_write(client, 0x05, timing->vactive & 0xff);
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bt819_write(client, 0x06, timing->hdelay & 0xff);
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bt819_write(client, 0x07, timing->hactive & 0xff);
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bt819_write(client, 0x08, (timing->hscale >> 8) & 0xff);
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bt819_write(client, 0x09, timing->hscale & 0xff);
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}
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decoder->norm = *iarg;
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}
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break;
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case DECODER_SET_INPUT:
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{
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int *iarg = arg;
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dprintk(1, KERN_INFO "%s: set input %x\n", I2C_NAME(client),
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*iarg);
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if (*iarg < 0 || *iarg > 7) {
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return -EINVAL;
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}
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if (decoder->input != *iarg) {
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decoder->input = *iarg;
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/* select mode */
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if (decoder->input == 0) {
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bt819_setbit(client, 0x0b, 6, 0);
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bt819_setbit(client, 0x1a, 1, 1);
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} else {
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bt819_setbit(client, 0x0b, 6, 1);
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bt819_setbit(client, 0x1a, 1, 0);
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}
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}
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}
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break;
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case DECODER_SET_OUTPUT:
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{
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int *iarg = arg;
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dprintk(1, KERN_INFO "%s: set output %x\n", I2C_NAME(client),
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*iarg);
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/* not much choice of outputs */
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if (*iarg != 0) {
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return -EINVAL;
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}
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}
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break;
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case DECODER_ENABLE_OUTPUT:
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{
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int *iarg = arg;
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int enable = (*iarg != 0);
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dprintk(1, KERN_INFO "%s: enable output %x\n",
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I2C_NAME(client), *iarg);
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if (decoder->enable != enable) {
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decoder->enable = enable;
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if (decoder->enable) {
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bt819_setbit(client, 0x16, 7, 0);
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} else {
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bt819_setbit(client, 0x16, 7, 1);
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}
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}
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}
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break;
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case DECODER_SET_PICTURE:
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{
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struct video_picture *pic = arg;
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dprintk(1,
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KERN_INFO
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"%s: set picture brightness %d contrast %d colour %d\n",
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I2C_NAME(client), pic->brightness, pic->contrast,
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pic->colour);
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if (decoder->bright != pic->brightness) {
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/* We want -128 to 127 we get 0-65535 */
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decoder->bright = pic->brightness;
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bt819_write(client, 0x0a,
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(decoder->bright >> 8) - 128);
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}
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if (decoder->contrast != pic->contrast) {
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/* We want 0 to 511 we get 0-65535 */
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decoder->contrast = pic->contrast;
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bt819_write(client, 0x0c,
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(decoder->contrast >> 7) & 0xff);
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bt819_setbit(client, 0x0b, 2,
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((decoder->contrast >> 15) & 0x01));
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}
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if (decoder->sat != pic->colour) {
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/* We want 0 to 511 we get 0-65535 */
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decoder->sat = pic->colour;
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bt819_write(client, 0x0d,
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(decoder->sat >> 7) & 0xff);
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bt819_setbit(client, 0x0b, 1,
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((decoder->sat >> 15) & 0x01));
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temp = (decoder->sat * 201) / 237;
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bt819_write(client, 0x0e, (temp >> 7) & 0xff);
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bt819_setbit(client, 0x0b, 0, (temp >> 15) & 0x01);
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}
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if (decoder->hue != pic->hue) {
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/* We want -128 to 127 we get 0-65535 */
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decoder->hue = pic->hue;
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bt819_write(client, 0x0f,
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128 - (decoder->hue >> 8));
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}
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}
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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/* ----------------------------------------------------------------------- */
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/*
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* Generic i2c probe
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* concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
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*/
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static unsigned short normal_i2c[] = {
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I2C_BT819 >> 1,
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I2C_CLIENT_END,
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};
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static unsigned short ignore = I2C_CLIENT_END;
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static struct i2c_client_address_data addr_data = {
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.normal_i2c = normal_i2c,
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.probe = &ignore,
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.ignore = &ignore,
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};
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static struct i2c_driver i2c_driver_bt819;
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static int
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bt819_detect_client (struct i2c_adapter *adapter,
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int address,
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int kind)
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{
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int i, id;
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struct bt819 *decoder;
|
|
struct i2c_client *client;
|
|
|
|
dprintk(1,
|
|
KERN_INFO
|
|
"saa7111.c: detecting bt819 client on address 0x%x\n",
|
|
address << 1);
|
|
|
|
/* Check if the adapter supports the needed features */
|
|
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
|
|
return 0;
|
|
|
|
client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
|
|
if (client == 0)
|
|
return -ENOMEM;
|
|
client->addr = address;
|
|
client->adapter = adapter;
|
|
client->driver = &i2c_driver_bt819;
|
|
|
|
decoder = kzalloc(sizeof(struct bt819), GFP_KERNEL);
|
|
if (decoder == NULL) {
|
|
kfree(client);
|
|
return -ENOMEM;
|
|
}
|
|
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;
|
|
i2c_set_clientdata(client, decoder);
|
|
|
|
id = bt819_read(client, 0x17);
|
|
switch (id & 0xf0) {
|
|
case 0x70:
|
|
strlcpy(I2C_NAME(client), "bt819a", sizeof(I2C_NAME(client)));
|
|
break;
|
|
case 0x60:
|
|
strlcpy(I2C_NAME(client), "bt817a", sizeof(I2C_NAME(client)));
|
|
break;
|
|
case 0x20:
|
|
strlcpy(I2C_NAME(client), "bt815a", sizeof(I2C_NAME(client)));
|
|
break;
|
|
default:
|
|
dprintk(1,
|
|
KERN_ERR
|
|
"bt819: unknown chip version 0x%x (ver 0x%x)\n",
|
|
id & 0xf0, id & 0x0f);
|
|
kfree(decoder);
|
|
kfree(client);
|
|
return 0;
|
|
}
|
|
|
|
i = i2c_attach_client(client);
|
|
if (i) {
|
|
kfree(client);
|
|
kfree(decoder);
|
|
return i;
|
|
}
|
|
|
|
i = bt819_init(client);
|
|
if (i < 0) {
|
|
dprintk(1, KERN_ERR "%s_attach: init status %d\n",
|
|
I2C_NAME(client), i);
|
|
} else {
|
|
dprintk(1,
|
|
KERN_INFO
|
|
"%s_attach: chip version 0x%x at address 0x%x\n",
|
|
I2C_NAME(client), id & 0x0f,
|
|
client->addr << 1);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
bt819_attach_adapter (struct i2c_adapter *adapter)
|
|
{
|
|
return i2c_probe(adapter, &addr_data, &bt819_detect_client);
|
|
}
|
|
|
|
static int
|
|
bt819_detach_client (struct i2c_client *client)
|
|
{
|
|
struct bt819 *decoder = i2c_get_clientdata(client);
|
|
int err;
|
|
|
|
err = i2c_detach_client(client);
|
|
if (err) {
|
|
return err;
|
|
}
|
|
|
|
kfree(decoder);
|
|
kfree(client);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* ----------------------------------------------------------------------- */
|
|
|
|
static struct i2c_driver i2c_driver_bt819 = {
|
|
.driver = {
|
|
.name = "bt819",
|
|
},
|
|
|
|
.id = I2C_DRIVERID_BT819,
|
|
|
|
.attach_adapter = bt819_attach_adapter,
|
|
.detach_client = bt819_detach_client,
|
|
.command = bt819_command,
|
|
};
|
|
|
|
static int __init
|
|
bt819_init_module (void)
|
|
{
|
|
return i2c_add_driver(&i2c_driver_bt819);
|
|
}
|
|
|
|
static void __exit
|
|
bt819_exit (void)
|
|
{
|
|
i2c_del_driver(&i2c_driver_bt819);
|
|
}
|
|
|
|
module_init(bt819_init_module);
|
|
module_exit(bt819_exit);
|