410 lines
12 KiB
C
410 lines
12 KiB
C
/*
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* For the TDA9875 chip
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* (The TDA9875 is used on the Diamond DTV2000 french version
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* Other cards probably use these chips as well.)
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* This driver will not complain if used with any
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* other i2c device with the same address.
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*
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* Copyright (c) 2000 Guillaume Delvit based on Gerd Knorr source and
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* Eric Sandeen
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* This code is placed under the terms of the GNU General Public License
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* Based on tda9855.c by Steve VanDeBogart (vandebo@uclink.berkeley.edu)
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* Which was based on tda8425.c by Greg Alexander (c) 1998
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*
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* OPTIONS:
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* debug - set to 1 if you'd like to see debug messages
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*
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* Revision: 0.1 - original version
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/string.h>
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#include <linux/timer.h>
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#include <linux/delay.h>
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#include <linux/errno.h>
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#include <linux/slab.h>
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#include <linux/videodev.h>
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#include <linux/i2c.h>
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#include <linux/i2c-algo-bit.h>
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#include <linux/init.h>
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#include "bttv.h"
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#include <media/audiochip.h>
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#include <media/id.h>
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static int debug; /* insmod parameter */
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module_param(debug, int, S_IRUGO | S_IWUSR);
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MODULE_LICENSE("GPL");
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/* Addresses to scan */
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static unsigned short normal_i2c[] = {
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I2C_TDA9875 >> 1,
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I2C_CLIENT_END
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};
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I2C_CLIENT_INSMOD;
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/* This is a superset of the TDA9875 */
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struct tda9875 {
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int mode;
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int rvol, lvol;
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int bass, treble;
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struct i2c_client c;
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};
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static struct i2c_driver driver;
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static struct i2c_client client_template;
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#define dprintk if (debug) printk
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/* The TDA9875 is made by Philips Semiconductor
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* http://www.semiconductors.philips.com
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* TDA9875: I2C-bus controlled DSP audio processor, FM demodulator
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*
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*/
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/* subaddresses for TDA9875 */
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#define TDA9875_MUT 0x12 /*General mute (value --> 0b11001100*/
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#define TDA9875_CFG 0x01 /* Config register (value --> 0b00000000 */
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#define TDA9875_DACOS 0x13 /*DAC i/o select (ADC) 0b0000100*/
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#define TDA9875_LOSR 0x16 /*Line output select regirter 0b0100 0001*/
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#define TDA9875_CH1V 0x0c /*Channel 1 volume (mute)*/
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#define TDA9875_CH2V 0x0d /*Channel 2 volume (mute)*/
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#define TDA9875_SC1 0x14 /*SCART 1 in (mono)*/
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#define TDA9875_SC2 0x15 /*SCART 2 in (mono)*/
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#define TDA9875_ADCIS 0x17 /*ADC input select (mono) 0b0110 000*/
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#define TDA9875_AER 0x19 /*Audio effect (AVL+Pseudo) 0b0000 0110*/
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#define TDA9875_MCS 0x18 /*Main channel select (DAC) 0b0000100*/
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#define TDA9875_MVL 0x1a /* Main volume gauche */
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#define TDA9875_MVR 0x1b /* Main volume droite */
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#define TDA9875_MBA 0x1d /* Main Basse */
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#define TDA9875_MTR 0x1e /* Main treble */
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#define TDA9875_ACS 0x1f /* Auxilary channel select (FM) 0b0000000*/
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#define TDA9875_AVL 0x20 /* Auxilary volume gauche */
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#define TDA9875_AVR 0x21 /* Auxilary volume droite */
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#define TDA9875_ABA 0x22 /* Auxilary Basse */
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#define TDA9875_ATR 0x23 /* Auxilary treble */
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#define TDA9875_MSR 0x02 /* Monitor select register */
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#define TDA9875_C1MSB 0x03 /* Carrier 1 (FM) frequency register MSB */
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#define TDA9875_C1MIB 0x04 /* Carrier 1 (FM) frequency register (16-8]b */
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#define TDA9875_C1LSB 0x05 /* Carrier 1 (FM) frequency register LSB */
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#define TDA9875_C2MSB 0x06 /* Carrier 2 (nicam) frequency register MSB */
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#define TDA9875_C2MIB 0x07 /* Carrier 2 (nicam) frequency register (16-8]b */
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#define TDA9875_C2LSB 0x08 /* Carrier 2 (nicam) frequency register LSB */
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#define TDA9875_DCR 0x09 /* Demodulateur configuration regirter*/
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#define TDA9875_DEEM 0x0a /* FM de-emphasis regirter*/
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#define TDA9875_FMAT 0x0b /* FM Matrix regirter*/
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/* values */
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#define TDA9875_MUTE_ON 0xff /* general mute */
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#define TDA9875_MUTE_OFF 0xcc /* general no mute */
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/* Begin code */
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static int tda9875_write(struct i2c_client *client, int subaddr, unsigned char val)
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{
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unsigned char buffer[2];
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dprintk("In tda9875_write\n");
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dprintk("Writing %d 0x%x\n", subaddr, val);
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buffer[0] = subaddr;
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buffer[1] = val;
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if (2 != i2c_master_send(client,buffer,2)) {
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printk(KERN_WARNING "tda9875: I/O error, trying (write %d 0x%x)\n",
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subaddr, val);
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return -1;
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}
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return 0;
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}
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static int i2c_read_register(struct i2c_adapter *adap, int addr, int reg)
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{
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unsigned char write[1];
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unsigned char read[1];
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struct i2c_msg msgs[2] = {
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{ addr, 0, 1, write },
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{ addr, I2C_M_RD, 1, read }
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};
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write[0] = reg;
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if (2 != i2c_transfer(adap,msgs,2)) {
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printk(KERN_WARNING "tda9875: I/O error (read2)\n");
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return -1;
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}
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dprintk("tda9875: chip_read2: reg%d=0x%x\n",reg,read[0]);
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return read[0];
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}
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static void tda9875_set(struct i2c_client *client)
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{
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struct tda9875 *tda = i2c_get_clientdata(client);
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unsigned char a;
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dprintk(KERN_DEBUG "tda9875_set(%04x,%04x,%04x,%04x)\n",
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tda->lvol,tda->rvol,tda->bass,tda->treble);
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a = tda->lvol & 0xff;
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tda9875_write(client, TDA9875_MVL, a);
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a =tda->rvol & 0xff;
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tda9875_write(client, TDA9875_MVR, a);
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a =tda->bass & 0xff;
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tda9875_write(client, TDA9875_MBA, a);
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a =tda->treble & 0xff;
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tda9875_write(client, TDA9875_MTR, a);
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}
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static void do_tda9875_init(struct i2c_client *client)
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{
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struct tda9875 *t = i2c_get_clientdata(client);
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dprintk("In tda9875_init\n");
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tda9875_write(client, TDA9875_CFG, 0xd0 ); /*reg de config 0 (reset)*/
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tda9875_write(client, TDA9875_MSR, 0x03 ); /* Monitor 0b00000XXX*/
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tda9875_write(client, TDA9875_C1MSB, 0x00 ); /*Car1(FM) MSB XMHz*/
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tda9875_write(client, TDA9875_C1MIB, 0x00 ); /*Car1(FM) MIB XMHz*/
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tda9875_write(client, TDA9875_C1LSB, 0x00 ); /*Car1(FM) LSB XMHz*/
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tda9875_write(client, TDA9875_C2MSB, 0x00 ); /*Car2(NICAM) MSB XMHz*/
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tda9875_write(client, TDA9875_C2MIB, 0x00 ); /*Car2(NICAM) MIB XMHz*/
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tda9875_write(client, TDA9875_C2LSB, 0x00 ); /*Car2(NICAM) LSB XMHz*/
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tda9875_write(client, TDA9875_DCR, 0x00 ); /*Demod config 0x00*/
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tda9875_write(client, TDA9875_DEEM, 0x44 ); /*DE-Emph 0b0100 0100*/
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tda9875_write(client, TDA9875_FMAT, 0x00 ); /*FM Matrix reg 0x00*/
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tda9875_write(client, TDA9875_SC1, 0x00 ); /* SCART 1 (SC1)*/
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tda9875_write(client, TDA9875_SC2, 0x01 ); /* SCART 2 (sc2)*/
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tda9875_write(client, TDA9875_CH1V, 0x10 ); /* Channel volume 1 mute*/
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tda9875_write(client, TDA9875_CH2V, 0x10 ); /* Channel volume 2 mute */
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tda9875_write(client, TDA9875_DACOS, 0x02 ); /* sig DAC i/o(in:nicam)*/
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tda9875_write(client, TDA9875_ADCIS, 0x6f ); /* sig ADC input(in:mono)*/
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tda9875_write(client, TDA9875_LOSR, 0x00 ); /* line out (in:mono)*/
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tda9875_write(client, TDA9875_AER, 0x00 ); /*06 Effect (AVL+PSEUDO) */
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tda9875_write(client, TDA9875_MCS, 0x44 ); /* Main ch select (DAC) */
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tda9875_write(client, TDA9875_MVL, 0x03 ); /* Vol Main left 10dB */
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tda9875_write(client, TDA9875_MVR, 0x03 ); /* Vol Main right 10dB*/
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tda9875_write(client, TDA9875_MBA, 0x00 ); /* Main Bass Main 0dB*/
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tda9875_write(client, TDA9875_MTR, 0x00 ); /* Main Treble Main 0dB*/
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tda9875_write(client, TDA9875_ACS, 0x44 ); /* Aux chan select (dac)*/
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tda9875_write(client, TDA9875_AVL, 0x00 ); /* Vol Aux left 0dB*/
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tda9875_write(client, TDA9875_AVR, 0x00 ); /* Vol Aux right 0dB*/
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tda9875_write(client, TDA9875_ABA, 0x00 ); /* Aux Bass Main 0dB*/
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tda9875_write(client, TDA9875_ATR, 0x00 ); /* Aux Aigus Main 0dB*/
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tda9875_write(client, TDA9875_MUT, 0xcc ); /* General mute */
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t->mode=AUDIO_UNMUTE;
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t->lvol=t->rvol =0; /* 0dB */
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t->bass=0; /* 0dB */
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t->treble=0; /* 0dB */
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tda9875_set(client);
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}
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/* *********************** *
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* i2c interface functions *
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* *********************** */
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static int tda9875_checkit(struct i2c_adapter *adap, int addr)
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{
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int dic,rev;
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dic=i2c_read_register(adap,addr,254);
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rev=i2c_read_register(adap,addr,255);
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if(dic==0 || dic==2) { // tda9875 and tda9875A
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printk("tda9875: TDA9875%s Rev.%d detected at 0x%x\n",
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dic==0?"":"A", rev,addr<<1);
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return 1;
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}
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printk("tda9875: no such chip at 0x%x (dic=0x%x rev=0x%x)\n",addr<<1,dic,rev);
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return(0);
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}
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static int tda9875_attach(struct i2c_adapter *adap, int addr, int kind)
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{
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struct tda9875 *t;
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struct i2c_client *client;
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dprintk("In tda9875_attach\n");
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t = kmalloc(sizeof *t,GFP_KERNEL);
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if (!t)
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return -ENOMEM;
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memset(t,0,sizeof *t);
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client = &t->c;
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memcpy(client,&client_template,sizeof(struct i2c_client));
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client->adapter = adap;
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client->addr = addr;
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i2c_set_clientdata(client, t);
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if(!tda9875_checkit(adap,addr)) {
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kfree(t);
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return 1;
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}
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do_tda9875_init(client);
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printk(KERN_INFO "tda9875: init\n");
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i2c_attach_client(client);
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return 0;
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}
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static int tda9875_probe(struct i2c_adapter *adap)
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{
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#ifdef I2C_CLASS_TV_ANALOG
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if (adap->class & I2C_CLASS_TV_ANALOG)
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return i2c_probe(adap, &addr_data, tda9875_attach);
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#else
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if (adap->id == I2C_HW_B_BT848)
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return i2c_probe(adap, &addr_data, tda9875_attach);
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#endif
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return 0;
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}
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static int tda9875_detach(struct i2c_client *client)
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{
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struct tda9875 *t = i2c_get_clientdata(client);
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do_tda9875_init(client);
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i2c_detach_client(client);
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kfree(t);
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return 0;
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}
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static int tda9875_command(struct i2c_client *client,
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unsigned int cmd, void *arg)
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{
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struct tda9875 *t = i2c_get_clientdata(client);
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dprintk("In tda9875_command...\n");
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switch (cmd) {
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/* --- v4l ioctls --- */
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/* take care: bttv does userspace copying, we'll get a
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kernel pointer here... */
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case VIDIOCGAUDIO:
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{
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struct video_audio *va = arg;
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int left,right;
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dprintk("VIDIOCGAUDIO\n");
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va->flags |= VIDEO_AUDIO_VOLUME |
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VIDEO_AUDIO_BASS |
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VIDEO_AUDIO_TREBLE;
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/* min is -84 max is 24 */
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left = (t->lvol+84)*606;
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right = (t->rvol+84)*606;
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va->volume=max(left,right);
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va->balance=(32768*min(left,right))/
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(va->volume ? va->volume : 1);
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va->balance=(left<right)?
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(65535-va->balance) : va->balance;
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va->bass = (t->bass+12)*2427; /* min -12 max +15 */
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va->treble = (t->treble+12)*2730;/* min -12 max +12 */
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va->mode |= VIDEO_SOUND_MONO;
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break; /* VIDIOCGAUDIO case */
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}
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case VIDIOCSAUDIO:
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{
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struct video_audio *va = arg;
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int left,right;
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dprintk("VIDEOCSAUDIO...\n");
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left = (min(65536 - va->balance,32768) *
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va->volume) / 32768;
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right = (min(va->balance,(__u16)32768) *
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va->volume) / 32768;
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t->lvol = ((left/606)-84) & 0xff;
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if (t->lvol > 24)
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t->lvol = 24;
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if (t->lvol < -84)
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t->lvol = -84 & 0xff;
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t->rvol = ((right/606)-84) & 0xff;
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if (t->rvol > 24)
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t->rvol = 24;
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if (t->rvol < -84)
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t->rvol = -84 & 0xff;
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t->bass = ((va->bass/2400)-12) & 0xff;
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if (t->bass > 15)
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t->bass = 15;
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if (t->bass < -12)
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t->bass = -12 & 0xff;
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t->treble = ((va->treble/2700)-12) & 0xff;
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if (t->treble > 12)
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t->treble = 12;
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if (t->treble < -12)
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t->treble = -12 & 0xff;
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//printk("tda9875 bal:%04x vol:%04x bass:%04x treble:%04x\n",va->balance,va->volume,va->bass,va->treble);
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tda9875_set(client);
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break;
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} /* end of VIDEOCSAUDIO case */
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default: /* Not VIDEOCGAUDIO or VIDEOCSAUDIO */
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/* nothing */
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dprintk("Default\n");
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} /* end of (cmd) switch */
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return 0;
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}
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static struct i2c_driver driver = {
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.owner = THIS_MODULE,
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.name = "i2c tda9875 driver",
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.id = I2C_DRIVERID_TDA9875,
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.flags = I2C_DF_NOTIFY,
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.attach_adapter = tda9875_probe,
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.detach_client = tda9875_detach,
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.command = tda9875_command,
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};
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static struct i2c_client client_template =
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{
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.name = "tda9875",
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.driver = &driver,
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};
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static int __init tda9875_init(void)
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{
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return i2c_add_driver(&driver);
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}
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static void __exit tda9875_fini(void)
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{
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i2c_del_driver(&driver);
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}
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module_init(tda9875_init);
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module_exit(tda9875_fini);
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/*
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* Local variables:
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* c-basic-offset: 8
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* End:
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*/
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