397 lines
11 KiB
C
397 lines
11 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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* Copyright (c) 2006 Mauro Carvalho Chehab <mchehab@infradead.org>
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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/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/i2c.h>
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#include <linux/videodev2.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-i2c-drv.h>
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#include <media/i2c-addr.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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/* This is a superset of the TDA9875 */
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struct tda9875 {
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struct v4l2_subdev sd;
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int rvol, lvol;
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int bass, treble;
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};
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static inline struct tda9875 *to_state(struct v4l2_subdev *sd)
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{
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return container_of(sd, struct tda9875, sd);
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}
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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 v4l2_subdev *sd, int subaddr, unsigned char val)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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unsigned char buffer[2];
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v4l2_dbg(1, debug, sd, "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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v4l2_warn(sd, "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_client *client, 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(client->adapter, msgs, 2)) {
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v4l_warn(client, "I/O error (read2)\n");
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return -1;
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}
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v4l_dbg(1, debug, client, "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 v4l2_subdev *sd)
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{
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struct tda9875 *tda = to_state(sd);
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unsigned char a;
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v4l2_dbg(1, debug, sd, "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(sd, TDA9875_MVL, a);
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a =tda->rvol & 0xff;
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tda9875_write(sd, TDA9875_MVR, a);
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a =tda->bass & 0xff;
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tda9875_write(sd, TDA9875_MBA, a);
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a =tda->treble & 0xff;
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tda9875_write(sd, TDA9875_MTR, a);
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}
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static void do_tda9875_init(struct v4l2_subdev *sd)
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{
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struct tda9875 *t = to_state(sd);
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v4l2_dbg(1, debug, sd, "In tda9875_init\n");
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tda9875_write(sd, TDA9875_CFG, 0xd0); /*reg de config 0 (reset)*/
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tda9875_write(sd, TDA9875_MSR, 0x03); /* Monitor 0b00000XXX*/
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tda9875_write(sd, TDA9875_C1MSB, 0x00); /*Car1(FM) MSB XMHz*/
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tda9875_write(sd, TDA9875_C1MIB, 0x00); /*Car1(FM) MIB XMHz*/
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tda9875_write(sd, TDA9875_C1LSB, 0x00); /*Car1(FM) LSB XMHz*/
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tda9875_write(sd, TDA9875_C2MSB, 0x00); /*Car2(NICAM) MSB XMHz*/
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tda9875_write(sd, TDA9875_C2MIB, 0x00); /*Car2(NICAM) MIB XMHz*/
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tda9875_write(sd, TDA9875_C2LSB, 0x00); /*Car2(NICAM) LSB XMHz*/
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tda9875_write(sd, TDA9875_DCR, 0x00); /*Demod config 0x00*/
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tda9875_write(sd, TDA9875_DEEM, 0x44); /*DE-Emph 0b0100 0100*/
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tda9875_write(sd, TDA9875_FMAT, 0x00); /*FM Matrix reg 0x00*/
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tda9875_write(sd, TDA9875_SC1, 0x00); /* SCART 1 (SC1)*/
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tda9875_write(sd, TDA9875_SC2, 0x01); /* SCART 2 (sc2)*/
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tda9875_write(sd, TDA9875_CH1V, 0x10); /* Channel volume 1 mute*/
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tda9875_write(sd, TDA9875_CH2V, 0x10); /* Channel volume 2 mute */
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tda9875_write(sd, TDA9875_DACOS, 0x02); /* sig DAC i/o(in:nicam)*/
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tda9875_write(sd, TDA9875_ADCIS, 0x6f); /* sig ADC input(in:mono)*/
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tda9875_write(sd, TDA9875_LOSR, 0x00); /* line out (in:mono)*/
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tda9875_write(sd, TDA9875_AER, 0x00); /*06 Effect (AVL+PSEUDO) */
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tda9875_write(sd, TDA9875_MCS, 0x44); /* Main ch select (DAC) */
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tda9875_write(sd, TDA9875_MVL, 0x03); /* Vol Main left 10dB */
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tda9875_write(sd, TDA9875_MVR, 0x03); /* Vol Main right 10dB*/
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tda9875_write(sd, TDA9875_MBA, 0x00); /* Main Bass Main 0dB*/
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tda9875_write(sd, TDA9875_MTR, 0x00); /* Main Treble Main 0dB*/
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tda9875_write(sd, TDA9875_ACS, 0x44); /* Aux chan select (dac)*/
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tda9875_write(sd, TDA9875_AVL, 0x00); /* Vol Aux left 0dB*/
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tda9875_write(sd, TDA9875_AVR, 0x00); /* Vol Aux right 0dB*/
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tda9875_write(sd, TDA9875_ABA, 0x00); /* Aux Bass Main 0dB*/
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tda9875_write(sd, TDA9875_ATR, 0x00); /* Aux Aigus Main 0dB*/
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tda9875_write(sd, TDA9875_MUT, 0xcc); /* General mute */
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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(sd);
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}
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static int tda9875_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
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{
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struct tda9875 *t = to_state(sd);
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switch (ctrl->id) {
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case V4L2_CID_AUDIO_VOLUME:
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{
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int left = (t->lvol+84)*606;
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int right = (t->rvol+84)*606;
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ctrl->value=max(left,right);
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return 0;
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}
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case V4L2_CID_AUDIO_BALANCE:
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{
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int left = (t->lvol+84)*606;
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int right = (t->rvol+84)*606;
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int volume = max(left,right);
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int balance = (32768*min(left,right))/
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(volume ? volume : 1);
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ctrl->value=(left<right)?
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(65535-balance) : balance;
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return 0;
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}
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case V4L2_CID_AUDIO_BASS:
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ctrl->value = (t->bass+12)*2427; /* min -12 max +15 */
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return 0;
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case V4L2_CID_AUDIO_TREBLE:
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ctrl->value = (t->treble+12)*2730;/* min -12 max +12 */
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return 0;
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}
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return -EINVAL;
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}
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static int tda9875_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
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{
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struct tda9875 *t = to_state(sd);
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int chvol = 0, volume = 0, balance = 0, left, right;
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switch (ctrl->id) {
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case V4L2_CID_AUDIO_VOLUME:
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left = (t->lvol+84)*606;
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right = (t->rvol+84)*606;
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volume = max(left,right);
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balance = (32768*min(left,right))/
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(volume ? volume : 1);
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balance =(left<right)?
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(65535-balance) : balance;
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volume = ctrl->value;
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chvol=1;
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break;
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case V4L2_CID_AUDIO_BALANCE:
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left = (t->lvol+84)*606;
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right = (t->rvol+84)*606;
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volume=max(left,right);
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balance = ctrl->value;
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chvol=1;
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break;
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case V4L2_CID_AUDIO_BASS:
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t->bass = ((ctrl->value/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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break;
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case V4L2_CID_AUDIO_TREBLE:
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t->treble = ((ctrl->value/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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break;
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default:
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return -EINVAL;
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}
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if (chvol) {
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left = (min(65536 - balance,32768) *
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volume) / 32768;
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right = (min(balance,32768) *
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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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}
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tda9875_set(sd);
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return 0;
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}
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static int tda9875_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
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{
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switch (qc->id) {
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case V4L2_CID_AUDIO_VOLUME:
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return v4l2_ctrl_query_fill(qc, 0, 65535, 65535 / 100, 58880);
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case V4L2_CID_AUDIO_BASS:
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case V4L2_CID_AUDIO_TREBLE:
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return v4l2_ctrl_query_fill(qc, 0, 65535, 65535 / 100, 32768);
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}
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return -EINVAL;
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}
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/* ----------------------------------------------------------------------- */
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static const struct v4l2_subdev_core_ops tda9875_core_ops = {
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.queryctrl = tda9875_queryctrl,
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.g_ctrl = tda9875_g_ctrl,
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.s_ctrl = tda9875_s_ctrl,
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};
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static const struct v4l2_subdev_ops tda9875_ops = {
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.core = &tda9875_core_ops,
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};
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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_client *client, int addr)
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{
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int dic, rev;
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dic = i2c_read_register(client, addr, 254);
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rev = i2c_read_register(client, addr, 255);
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if (dic == 0 || dic == 2) { /* tda9875 and tda9875A */
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v4l_info(client, "tda9875%s rev. %d detected at 0x%02x\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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v4l_info(client, "no such chip at 0x%02x (dic=0x%x rev=0x%x)\n",
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addr << 1, dic, rev);
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return 0;
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}
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static int tda9875_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct tda9875 *t;
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struct v4l2_subdev *sd;
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v4l_info(client, "chip found @ 0x%02x (%s)\n",
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client->addr << 1, client->adapter->name);
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if (!tda9875_checkit(client, client->addr))
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return -ENODEV;
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t = kzalloc(sizeof(*t), GFP_KERNEL);
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if (!t)
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return -ENOMEM;
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sd = &t->sd;
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v4l2_i2c_subdev_init(sd, client, &tda9875_ops);
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do_tda9875_init(sd);
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return 0;
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}
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static int tda9875_remove(struct i2c_client *client)
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{
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struct v4l2_subdev *sd = i2c_get_clientdata(client);
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do_tda9875_init(sd);
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v4l2_device_unregister_subdev(sd);
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kfree(to_state(sd));
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return 0;
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}
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static const struct i2c_device_id tda9875_id[] = {
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{ "tda9875", 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, tda9875_id);
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static struct v4l2_i2c_driver_data v4l2_i2c_data = {
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.name = "tda9875",
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.probe = tda9875_probe,
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.remove = tda9875_remove,
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.id_table = tda9875_id,
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};
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