513 lines
12 KiB
C
513 lines
12 KiB
C
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/*
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* saa7191.c - Philips SAA7191 video decoder driver
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*
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* Copyright (C) 2003 Ladislav Michl <ladis@linux-mips.org>
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* Copyright (C) 2004,2005 Mikael Nousiainen <tmnousia@cc.hut.fi>
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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 version 2 as
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* published by the Free Software Foundation.
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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/sched.h>
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#include <linux/videodev.h>
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#include <linux/video_decoder.h>
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#include <linux/i2c.h>
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#include "saa7191.h"
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#define SAA7191_MODULE_VERSION "0.0.3"
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MODULE_DESCRIPTION("Philips SAA7191 video decoder driver");
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MODULE_VERSION(SAA7191_MODULE_VERSION);
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MODULE_AUTHOR("Mikael Nousiainen <tmnousia@cc.hut.fi>");
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MODULE_LICENSE("GPL");
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#define VINO_ADAPTER (I2C_ALGO_SGI | I2C_HW_SGI_VINO)
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struct saa7191 {
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struct i2c_client *client;
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/* the register values are stored here as the actual
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* I2C-registers are write-only */
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unsigned char reg[25];
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unsigned char norm;
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unsigned char input;
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};
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static struct i2c_driver i2c_driver_saa7191;
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static const unsigned char initseq[] = {
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0, /* Subaddress */
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0x50, /* SAA7191_REG_IDEL */
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0x30, /* SAA7191_REG_HSYB */
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0x00, /* SAA7191_REG_HSYS */
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0xe8, /* SAA7191_REG_HCLB */
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0xb6, /* SAA7191_REG_HCLS */
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0xf4, /* SAA7191_REG_HPHI */
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0x01, /* SAA7191_REG_LUMA - chrominance trap active (CVBS) */
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0x00, /* SAA7191_REG_HUEC */
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0xf8, /* SAA7191_REG_CKTQ */
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0xf8, /* SAA7191_REG_CKTS */
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0x90, /* SAA7191_REG_PLSE */
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0x90, /* SAA7191_REG_SESE */
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0x00, /* SAA7191_REG_GAIN */
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0x0c, /* SAA7191_REG_STDC - not SECAM, slow time constant */
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0x78, /* SAA7191_REG_IOCK - chrominance from CVBS, GPSW1 & 2 off */
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0x99, /* SAA7191_REG_CTL3 - automatic field detection */
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0x00, /* SAA7191_REG_CTL4 */
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0x2c, /* SAA7191_REG_CHCV */
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0x00, /* unused */
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0x00, /* unused */
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0x34, /* SAA7191_REG_HS6B */
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0x0a, /* SAA7191_REG_HS6S */
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0xf4, /* SAA7191_REG_HC6B */
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0xce, /* SAA7191_REG_HC6S */
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0xf4, /* SAA7191_REG_HP6I */
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};
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/* SAA7191 register handling */
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static unsigned char saa7191_read_reg(struct i2c_client *client,
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unsigned char reg)
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{
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return ((struct saa7191 *)i2c_get_clientdata(client))->reg[reg];
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}
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static int saa7191_read_status(struct i2c_client *client,
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unsigned char *value)
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{
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int ret;
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ret = i2c_master_recv(client, value, 1);
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if (ret < 0) {
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printk(KERN_ERR "SAA7191: saa7191_read_status(): read failed");
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return ret;
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}
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return 0;
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}
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static int saa7191_write_reg(struct i2c_client *client, unsigned char reg,
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unsigned char value)
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{
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((struct saa7191 *)i2c_get_clientdata(client))->reg[reg] = value;
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return i2c_smbus_write_byte_data(client, reg, value);
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}
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/* the first byte of data must be the first subaddress number (register) */
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static int saa7191_write_block(struct i2c_client *client,
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unsigned char length, unsigned char *data)
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{
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int i;
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int ret;
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struct saa7191 *decoder = (struct saa7191 *)i2c_get_clientdata(client);
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for (i = 0; i < (length - 1); i++) {
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decoder->reg[data[0] + i] = data[i + 1];
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}
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ret = i2c_master_send(client, data, length);
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if (ret < 0) {
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printk(KERN_ERR "SAA7191: saa7191_write_block(): "
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"write failed");
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return ret;
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}
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return 0;
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}
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/* Helper functions */
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static int saa7191_set_input(struct i2c_client *client, int input)
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{
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unsigned char luma = saa7191_read_reg(client, SAA7191_REG_LUMA);
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unsigned char iock = saa7191_read_reg(client, SAA7191_REG_IOCK);
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int err;
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switch (input) {
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case SAA7191_INPUT_COMPOSITE: /* Set Composite input */
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iock &= ~(SAA7191_IOCK_CHRS | SAA7191_IOCK_GPSW1
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| SAA7191_IOCK_GPSW2);
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/* Chrominance trap active */
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luma &= ~SAA7191_LUMA_BYPS;
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break;
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case SAA7191_INPUT_SVIDEO: /* Set S-Video input */
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iock |= SAA7191_IOCK_CHRS | SAA7191_IOCK_GPSW2;
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/* Chrominance trap bypassed */
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luma |= SAA7191_LUMA_BYPS;
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break;
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default:
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return -EINVAL;
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}
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err = saa7191_write_reg(client, SAA7191_REG_LUMA, luma);
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if (err)
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return -EIO;
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err = saa7191_write_reg(client, SAA7191_REG_IOCK, iock);
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if (err)
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return -EIO;
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return 0;
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}
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static int saa7191_set_norm(struct i2c_client *client, int norm)
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{
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struct saa7191 *decoder = i2c_get_clientdata(client);
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unsigned char stdc = saa7191_read_reg(client, SAA7191_REG_STDC);
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unsigned char ctl3 = saa7191_read_reg(client, SAA7191_REG_CTL3);
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unsigned char chcv = saa7191_read_reg(client, SAA7191_REG_CHCV);
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int err;
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switch(norm) {
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case SAA7191_NORM_AUTO: {
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unsigned char status;
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// does status depend on current norm ?
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if (saa7191_read_status(client, &status))
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return -EIO;
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stdc &= ~SAA7191_STDC_SECS;
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ctl3 &= ~SAA7191_CTL3_FSEL;
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ctl3 |= SAA7191_CTL3_AUFD;
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chcv = (status & SAA7191_STATUS_FIDT)
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? SAA7191_CHCV_NTSC : SAA7191_CHCV_PAL;
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break;
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}
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case SAA7191_NORM_PAL:
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stdc &= ~SAA7191_STDC_SECS;
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ctl3 &= ~(SAA7191_CTL3_AUFD | SAA7191_CTL3_FSEL);
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chcv = SAA7191_CHCV_PAL;
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break;
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case SAA7191_NORM_NTSC:
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stdc &= ~SAA7191_STDC_SECS;
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ctl3 &= ~SAA7191_CTL3_AUFD;
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ctl3 |= SAA7191_CTL3_FSEL;
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chcv = SAA7191_CHCV_NTSC;
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break;
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case SAA7191_NORM_SECAM:
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stdc |= SAA7191_STDC_SECS;
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ctl3 &= ~(SAA7191_CTL3_AUFD | SAA7191_CTL3_FSEL);
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chcv = SAA7191_CHCV_PAL;
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break;
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default:
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return -EINVAL;
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}
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err = saa7191_write_reg(client, SAA7191_REG_CTL3, ctl3);
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if (err)
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return -EIO;
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err = saa7191_write_reg(client, SAA7191_REG_STDC, stdc);
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if (err)
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return -EIO;
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err = saa7191_write_reg(client, SAA7191_REG_CHCV, chcv);
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if (err)
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return -EIO;
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decoder->norm = norm;
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return 0;
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}
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static int saa7191_get_controls(struct i2c_client *client,
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struct saa7191_control *ctrl)
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{
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unsigned char hue = saa7191_read_reg(client, SAA7191_REG_HUEC);
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unsigned char stdc = saa7191_read_reg(client, SAA7191_REG_STDC);
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if (hue < 0x80) {
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hue += 0x80;
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} else {
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hue -= 0x80;
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}
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ctrl->hue = hue;
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ctrl->vtrc = (stdc & SAA7191_STDC_VTRC)
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? SAA7191_VALUE_ENABLED : SAA7191_VALUE_DISABLED;
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return 0;
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}
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static int saa7191_set_controls(struct i2c_client *client,
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struct saa7191_control *ctrl)
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{
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int err;
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if (ctrl->hue >= 0) {
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unsigned char hue = ctrl->hue & 0xff;
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if (hue < 0x80) {
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hue += 0x80;
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} else {
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hue -= 0x80;
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}
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err = saa7191_write_reg(client, SAA7191_REG_HUEC, hue);
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if (err)
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return -EIO;
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}
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if (ctrl->vtrc >= 0) {
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unsigned char stdc =
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saa7191_read_reg(client, SAA7191_REG_STDC);
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if (ctrl->vtrc) {
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stdc |= SAA7191_STDC_VTRC;
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} else {
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stdc &= ~SAA7191_STDC_VTRC;
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}
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err = saa7191_write_reg(client, SAA7191_REG_STDC, stdc);
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if (err)
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return -EIO;
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}
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return 0;
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}
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/* I2C-interface */
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static int saa7191_attach(struct i2c_adapter *adap, int addr, int kind)
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{
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int err = 0;
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struct saa7191 *decoder;
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struct i2c_client *client;
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printk(KERN_INFO "Philips SAA7191 driver version %s\n",
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SAA7191_MODULE_VERSION);
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client = kmalloc(sizeof(*client), GFP_KERNEL);
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if (!client)
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return -ENOMEM;
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decoder = kmalloc(sizeof(*decoder), GFP_KERNEL);
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if (!decoder) {
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err = -ENOMEM;
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goto out_free_client;
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}
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memset(client, 0, sizeof(struct i2c_client));
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memset(decoder, 0, sizeof(struct saa7191));
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client->addr = addr;
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client->adapter = adap;
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client->driver = &i2c_driver_saa7191;
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client->flags = 0;
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strcpy(client->name, "saa7191 client");
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i2c_set_clientdata(client, decoder);
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decoder->client = client;
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err = i2c_attach_client(client);
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if (err)
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goto out_free_decoder;
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decoder->input = SAA7191_INPUT_COMPOSITE;
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decoder->norm = SAA7191_NORM_AUTO;
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err = saa7191_write_block(client, sizeof(initseq),
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(unsigned char *)initseq);
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if (err) {
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printk(KERN_ERR "SAA7191 initialization failed\n");
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goto out_detach_client;
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}
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printk(KERN_INFO "SAA7191 initialized\n");
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return 0;
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out_detach_client:
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i2c_detach_client(client);
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out_free_decoder:
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kfree(decoder);
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out_free_client:
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kfree(client);
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return err;
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}
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static int saa7191_probe(struct i2c_adapter *adap)
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{
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/* Always connected to VINO */
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if (adap->id == VINO_ADAPTER)
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return saa7191_attach(adap, SAA7191_ADDR, 0);
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/* Feel free to add probe here :-) */
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return -ENODEV;
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}
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static int saa7191_detach(struct i2c_client *client)
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{
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struct saa7191 *decoder = i2c_get_clientdata(client);
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i2c_detach_client(client);
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kfree(decoder);
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kfree(client);
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return 0;
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}
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static int saa7191_command(struct i2c_client *client, unsigned int cmd,
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void *arg)
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{
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struct saa7191 *decoder = i2c_get_clientdata(client);
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switch (cmd) {
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case DECODER_GET_CAPABILITIES: {
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struct video_decoder_capability *cap = arg;
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|
|
cap->flags = VIDEO_DECODER_PAL | VIDEO_DECODER_NTSC |
|
||
|
|
VIDEO_DECODER_SECAM | VIDEO_DECODER_AUTO;
|
||
|
|
cap->inputs = (client->adapter->id == VINO_ADAPTER) ? 2 : 1;
|
||
|
|
cap->outputs = 1;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
case DECODER_GET_STATUS: {
|
||
|
|
int *iarg = arg;
|
||
|
|
unsigned char status;
|
||
|
|
int res = 0;
|
||
|
|
|
||
|
|
if (saa7191_read_status(client, &status)) {
|
||
|
|
return -EIO;
|
||
|
|
}
|
||
|
|
if ((status & SAA7191_STATUS_HLCK) == 0)
|
||
|
|
res |= DECODER_STATUS_GOOD;
|
||
|
|
if (status & SAA7191_STATUS_CODE)
|
||
|
|
res |= DECODER_STATUS_COLOR;
|
||
|
|
switch (decoder->norm) {
|
||
|
|
case SAA7191_NORM_NTSC:
|
||
|
|
res |= DECODER_STATUS_NTSC;
|
||
|
|
break;
|
||
|
|
case SAA7191_NORM_PAL:
|
||
|
|
res |= DECODER_STATUS_PAL;
|
||
|
|
break;
|
||
|
|
case SAA7191_NORM_SECAM:
|
||
|
|
res |= DECODER_STATUS_SECAM;
|
||
|
|
break;
|
||
|
|
case SAA7191_NORM_AUTO:
|
||
|
|
default:
|
||
|
|
if (status & SAA7191_STATUS_FIDT)
|
||
|
|
res |= DECODER_STATUS_NTSC;
|
||
|
|
else
|
||
|
|
res |= DECODER_STATUS_PAL;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
*iarg = res;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
case DECODER_SET_NORM: {
|
||
|
|
int *iarg = arg;
|
||
|
|
|
||
|
|
switch (*iarg) {
|
||
|
|
case VIDEO_MODE_AUTO:
|
||
|
|
return saa7191_set_norm(client, SAA7191_NORM_AUTO);
|
||
|
|
case VIDEO_MODE_PAL:
|
||
|
|
return saa7191_set_norm(client, SAA7191_NORM_PAL);
|
||
|
|
case VIDEO_MODE_NTSC:
|
||
|
|
return saa7191_set_norm(client, SAA7191_NORM_NTSC);
|
||
|
|
case VIDEO_MODE_SECAM:
|
||
|
|
return saa7191_set_norm(client, SAA7191_NORM_SECAM);
|
||
|
|
default:
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
case DECODER_SET_INPUT: {
|
||
|
|
int *iarg = arg;
|
||
|
|
|
||
|
|
switch (client->adapter->id) {
|
||
|
|
case VINO_ADAPTER:
|
||
|
|
return saa7191_set_input(client, *iarg);
|
||
|
|
default:
|
||
|
|
if (*iarg != 0)
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
case DECODER_SET_OUTPUT: {
|
||
|
|
int *iarg = arg;
|
||
|
|
|
||
|
|
/* not much choice of outputs */
|
||
|
|
if (*iarg != 0)
|
||
|
|
return -EINVAL;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
case DECODER_ENABLE_OUTPUT: {
|
||
|
|
/* Always enabled */
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
case DECODER_SET_PICTURE: {
|
||
|
|
struct video_picture *pic = arg;
|
||
|
|
unsigned val;
|
||
|
|
int err;
|
||
|
|
|
||
|
|
val = (pic->hue >> 8) - 0x80;
|
||
|
|
err = saa7191_write_reg(client, SAA7191_REG_HUEC, val);
|
||
|
|
if (err)
|
||
|
|
return -EIO;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
case DECODER_SAA7191_GET_STATUS: {
|
||
|
|
struct saa7191_status *status = arg;
|
||
|
|
unsigned char status_reg;
|
||
|
|
|
||
|
|
if (saa7191_read_status(client, &status_reg))
|
||
|
|
return -EIO;
|
||
|
|
status->signal = ((status_reg & SAA7191_STATUS_HLCK) == 0)
|
||
|
|
? SAA7191_VALUE_ENABLED : SAA7191_VALUE_DISABLED;
|
||
|
|
status->ntsc = (status_reg & SAA7191_STATUS_FIDT)
|
||
|
|
? SAA7191_VALUE_ENABLED : SAA7191_VALUE_DISABLED;
|
||
|
|
status->color = (status_reg & SAA7191_STATUS_CODE)
|
||
|
|
? SAA7191_VALUE_ENABLED : SAA7191_VALUE_DISABLED;
|
||
|
|
|
||
|
|
status->input = decoder->input;
|
||
|
|
status->norm = decoder->norm;
|
||
|
|
}
|
||
|
|
case DECODER_SAA7191_SET_NORM: {
|
||
|
|
int *norm = arg;
|
||
|
|
return saa7191_set_norm(client, *norm);
|
||
|
|
}
|
||
|
|
case DECODER_SAA7191_GET_CONTROLS: {
|
||
|
|
struct saa7191_control *ctrl = arg;
|
||
|
|
return saa7191_get_controls(client, ctrl);
|
||
|
|
}
|
||
|
|
case DECODER_SAA7191_SET_CONTROLS: {
|
||
|
|
struct saa7191_control *ctrl = arg;
|
||
|
|
return saa7191_set_controls(client, ctrl);
|
||
|
|
}
|
||
|
|
default:
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct i2c_driver i2c_driver_saa7191 = {
|
||
|
|
.owner = THIS_MODULE,
|
||
|
|
.name = "saa7191",
|
||
|
|
.id = I2C_DRIVERID_SAA7191,
|
||
|
|
.flags = I2C_DF_NOTIFY,
|
||
|
|
.attach_adapter = saa7191_probe,
|
||
|
|
.detach_client = saa7191_detach,
|
||
|
|
.command = saa7191_command
|
||
|
|
};
|
||
|
|
|
||
|
|
static int saa7191_init(void)
|
||
|
|
{
|
||
|
|
return i2c_add_driver(&i2c_driver_saa7191);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void saa7191_exit(void)
|
||
|
|
{
|
||
|
|
i2c_del_driver(&i2c_driver_saa7191);
|
||
|
|
}
|
||
|
|
|
||
|
|
module_init(saa7191_init);
|
||
|
|
module_exit(saa7191_exit);
|