/*
* For the TDA9875 chip
* (The TDA9875 is used on the Diamond DTV2000 french version
* Other cards probably use these chips as well.)
* This driver will not complain if used with any
* other i2c device with the same address.
*
* Copyright (c) 2000 Guillaume Delvit based on Gerd Knorr source and
* Eric Sandeen
* Copyright (c) 2006 Mauro Carvalho Chehab <mchehab@infradead.org>
* This code is placed under the terms of the GNU General Public License
* Based on tda9855.c by Steve VanDeBogart (vandebo@uclink.berkeley.edu)
* Which was based on tda8425.c by Greg Alexander (c) 1998
*
* OPTIONS:
* debug - set to 1 if you'd like to see debug messages
*
* Revision: 0.1 - original version
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/videodev2.h>
#include <media/v4l2-device.h>
#include <media/i2c-addr.h>
static int debug; /* insmod parameter */
module_param(debug, int, S_IRUGO | S_IWUSR);
MODULE_LICENSE("GPL");
/* This is a superset of the TDA9875 */
struct tda9875 {
struct v4l2_subdev sd;
int rvol, lvol;
int bass, treble;
};
static inline struct tda9875 *to_state(struct v4l2_subdev *sd)
{
return container_of(sd, struct tda9875, sd);
}
#define dprintk if (debug) printk
/* The TDA9875 is made by Philips Semiconductor
* http://www.semiconductors.philips.com
* TDA9875: I2C-bus controlled DSP audio processor, FM demodulator
*
*/
/* subaddresses for TDA9875 */
#define TDA9875_MUT 0x12 /*General mute (value --> 0b11001100*/
#define TDA9875_CFG 0x01 /* Config register (value --> 0b00000000 */
#define TDA9875_DACOS 0x13 /*DAC i/o select (ADC) 0b0000100*/
#define TDA9875_LOSR 0x16 /*Line output select regirter 0b0100 0001*/
#define TDA9875_CH1V 0x0c /*Channel 1 volume (mute)*/
#define TDA9875_CH2V 0x0d /*Channel 2 volume (mute)*/
#define TDA9875_SC1 0x14 /*SCART 1 in (mono)*/
#define TDA9875_SC2 0x15 /*SCART 2 in (mono)*/
#define TDA9875_ADCIS 0x17 /*ADC input select (mono) 0b0110 000*/
#define TDA9875_AER 0x19 /*Audio effect (AVL+Pseudo) 0b0000 0110*/
#define TDA9875_MCS 0x18 /*Main channel select (DAC) 0b0000100*/
#define TDA9875_MVL 0x1a /* Main volume gauche */
#define TDA9875_MVR 0x1b /* Main volume droite */
#define TDA9875_MBA 0x1d /* Main Basse */
#define TDA9875_MTR 0x1e /* Main treble */
#define TDA9875_ACS 0x1f /* Auxilary channel select (FM) 0b0000000*/
#define TDA9875_AVL 0x20 /* Auxilary volume gauche */
#define TDA9875_AVR 0x21 /* Auxilary volume droite */
#define TDA9875_ABA 0x22 /* Auxilary Basse */
#define TDA9875_ATR 0x23 /* Auxilary treble */
#define TDA9875_MSR 0x02 /* Monitor select register */
#define TDA9875_C1MSB 0x03 /* Carrier 1 (FM) frequency register MSB */
#define TDA9875_C1MIB 0x04 /* Carrier 1 (FM) frequency register (16-8]b */
#define TDA9875_C1LSB 0x05 /* Carrier 1 (FM) frequency register LSB */
#define TDA9875_C2MSB 0x06 /* Carrier 2 (nicam) frequency register MSB */
#define TDA9875_C2MIB 0x07 /* Carrier 2 (nicam) frequency register (16-8]b */
#define TDA9875_C2LSB 0x08 /* Carrier 2 (nicam) frequency register LSB */
#define TDA9875_DCR 0x09 /* Demodulateur configuration regirter*/
#define TDA9875_DEEM 0x0a /* FM de-emphasis regirter*/
#define TDA9875_FMAT 0x0b /* FM Matrix regirter*/
/* values */
#define TDA9875_MUTE_ON 0xff /* general mute */
#define TDA9875_MUTE_OFF 0xcc /* general no mute */
/* Begin code */
static int tda9875_write(struct v4l2_subdev *sd, int subaddr, unsigned char val)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
unsigned char buffer[2];
v4l2_dbg(1, debug, sd, "Writing %d 0x%x\n", subaddr, val);
buffer[0] = subaddr;
buffer[1] = val;
if (2 != i2c_master_send(client, buffer, 2)) {
v4l2_warn(sd, "I/O error, trying (write %d 0x%x)\n",
subaddr, val);
return -1;
}
return 0;
}
static int i2c_read_register(struct i2c_client *client, int addr, int reg)
{
unsigned char write[1];
unsigned char read[1];
struct i2c_msg msgs[2] = {
{ addr, 0, 1, write },
{ addr, I2C_M_RD, 1, read }
};
write[0] = reg;
if (2 != i2c_transfer(client->adapter, msgs, 2)) {
v4l_warn(client, "I/O error (read2)\n");
return -1;
}
v4l_dbg(1, debug, client, "chip_read2: reg%d=0x%x\n", reg, read[0]);
return read[0];
}
static void tda9875_set(struct v4l2_subdev *sd)
{
struct tda9875 *tda = to_state(sd);
unsigned char a;
v4l2_dbg(1, debug, sd, "tda9875_set(%04x,%04x,%04x,%04x)\n",
tda->lvol, tda->rvol, tda->bass, tda->treble);
a = tda->lvol & 0xff;
tda9875_write(sd, TDA9875_MVL, a);
a =tda->rvol & 0xff;
tda9875_write(sd, TDA9875_MVR, a);
a =tda->bass & 0xff;
tda9875_write(sd, TDA9875_MBA, a);
a =tda->treble & 0xff;
tda9875_write(sd, TDA9875_MTR, a);
}
static void do_tda9875_init(struct v4l2_subdev *sd)
{
struct tda9875 *t = to_state(sd);
v4l2_dbg(1, debug, sd, "In tda9875_init\n");
tda9875_write(sd, TDA9875_CFG, 0xd0); /*reg de config 0 (reset)*/
tda9875_write(sd, TDA9875_MSR, 0x03); /* Monitor 0b00000XXX*/
tda9875_write(sd, TDA9875_C1MSB, 0x00); /*Car1(FM) MSB XMHz*/
tda9875_write(sd, TDA9875_C1MIB, 0x00); /*Car1(FM) MIB XMHz*/
tda9875_write(sd, TDA9875_C1LSB, 0x00); /*Car1(FM) LSB XMHz*/
tda9875_write(sd, TDA9875_C2MSB, 0x00); /*Car2(NICAM) MSB XMHz*/
tda9875_write(sd, TDA9875_C2MIB, 0x00); /*Car2(NICAM) MIB XMHz*/
tda9875_write(sd, TDA9875_C2LSB, 0x00); /*Car2(NICAM) LSB XMHz*/
tda9875_write(sd, TDA9875_DCR, 0x00); /*Demod config 0x00*/
tda9875_write(sd, TDA9875_DEEM, 0x44); /*DE-Emph 0b0100 0100*/
tda9875_write(sd, TDA9875_FMAT, 0x00); /*FM Matrix reg 0x00*/
tda9875_write(sd, TDA9875_SC1, 0x00); /* SCART 1 (SC1)*/
tda9875_write(sd, TDA9875_SC2, 0x01); /* SCART 2 (sc2)*/
tda9875_write(sd, TDA9875_CH1V, 0x10); /* Channel volume 1 mute*/
tda9875_write(sd, TDA9875_CH2V, 0x10); /* Channel volume 2 mute */
tda9875_write(sd, TDA9875_DACOS, 0x02); /* sig DAC i/o(in:nicam)*/
tda9875_write(sd, TDA9875_ADCIS, 0x6f); /* sig ADC input(in:mono)*/
tda9875_write(sd, TDA9875_LOSR, 0x00); /* line out (in:mono)*/
tda9875_write(sd, TDA9875_AER, 0x00); /*06 Effect (AVL+PSEUDO) */
tda9875_write(sd, TDA9875_MCS, 0x44); /* Main ch select (DAC) */
tda9875_write(sd, TDA9875_MVL, 0x03); /* Vol Main left 10dB */
tda9875_write(sd, TDA9875_MVR, 0x03); /* Vol Main right 10dB*/
tda9875_write(sd, TDA9875_MBA, 0x00); /* Main Bass Main 0dB*/
tda9875_write(sd, TDA9875_MTR, 0x00); /* Main Treble Main 0dB*/
tda9875_write(sd, TDA9875_ACS, 0x44); /* Aux chan select (dac)*/
tda9875_write(sd, TDA9875_AVL, 0x00); /* Vol Aux left 0dB*/
tda9875_write(sd, TDA9875_AVR, 0x00); /* Vol Aux right 0dB*/
tda9875_write(sd, TDA9875_ABA, 0x00); /* Aux Bass Main 0dB*/
tda9875_write(sd, TDA9875_ATR, 0x00); /* Aux Aigus Main 0dB*/
tda9875_write(sd, TDA9875_MUT, 0xcc); /* General mute */
t->lvol = t->rvol = 0; /* 0dB */
t->bass = 0; /* 0dB */
t->treble = 0; /* 0dB */
tda9875_set(sd);
}
static int tda9875_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
{
struct tda9875 *t = to_state(sd);
switch (ctrl->id) {
case V4L2_CID_AUDIO_VOLUME:
{
int left = (t->lvol+84)*606;
int right = (t->rvol+84)*606;
ctrl->value=max(left,right);
return 0;
}
case V4L2_CID_AUDIO_BALANCE:
{
int left = (t->lvol+84)*606;
int right = (t->rvol+84)*606;
int volume = max(left,right);
int balance = (32768*min(left,right))/
(volume ? volume : 1);
ctrl->value=(left<right)?
(65535-balance) : balance;
return 0;
}
case V4L2_CID_AUDIO_BASS:
ctrl->value = (t->bass+12)*2427; /* min -12 max +15 */
return 0;
case V4L2_CID_AUDIO_TREBLE:
ctrl->value = (t->treble+12)*2730;/* min -12 max +12 */
return 0;
}
return -EINVAL;
}
static int tda9875_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
{
struct tda9875 *t = to_state(sd);
int chvol = 0, volume = 0, balance = 0, left, right;
switch (ctrl->id) {
case V4L2_CID_AUDIO_VOLUME:
left = (t->lvol+84)*606;
right = (t->rvol+84)*606;
volume = max(left,right);
balance = (32768*min(left,right))/
(volume ? volume : 1);
balance =(left<right)?
(65535-balance) : balance;
volume = ctrl->value;
chvol=1;
break;
case V4L2_CID_AUDIO_BALANCE:
left = (t->lvol+84)*606;
right = (t->rvol+84)*606;
volume=max(left,right);
balance = ctrl->value;
chvol=1;
break;
case V4L2_CID_AUDIO_BASS:
t->bass = ((ctrl->value/2400)-12) & 0xff;
if (t->bass > 15)
t->bass = 15;
if (t->bass < -12)
t->bass = -12 & 0xff;
break;
case V4L2_CID_AUDIO_TREBLE:
t->treble = ((ctrl->value/2700)-12) & 0xff;
if (t->treble > 12)
t->treble = 12;
if (t->treble < -12)
t->treble = -12 & 0xff;
break;
default:
return -EINVAL;
}
if (chvol) {
left = (min(65536 - balance,32768) *
volume) / 32768;
right = (min(balance,32768) *
volume) / 32768;
t->lvol = ((left/606)-84) & 0xff;
if (t->lvol > 24)
t->lvol = 24;
if (t->lvol < -84)
t->lvol = -84 & 0xff;
t->rvol = ((right/606)-84) & 0xff;
if (t->rvol > 24)
t->rvol = 24;
if (t->rvol < -84)
t->rvol = -84 & 0xff;
}
tda9875_set(sd);
return 0;
}
static int tda9875_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
{
switch (qc->id) {
case V4L2_CID_AUDIO_VOLUME:
return v4l2_ctrl_query_fill(qc, 0, 65535, 65535 / 100, 58880);
case V4L2_CID_AUDIO_BASS:
case V4L2_CID_AUDIO_TREBLE:
return v4l2_ctrl_query_fill(qc, 0, 65535, 65535 / 100, 32768);
}
return -EINVAL;
}
/* ----------------------------------------------------------------------- */
static const struct v4l2_subdev_core_ops tda9875_core_ops = {
.queryctrl = tda9875_queryctrl,
.g_ctrl = tda9875_g_ctrl,
.s_ctrl = tda9875_s_ctrl,
};
static const struct v4l2_subdev_ops tda9875_ops = {
.core = &tda9875_core_ops,
};
/* ----------------------------------------------------------------------- */
/* *********************** *
* i2c interface functions *
* *********************** */
static int tda9875_checkit(struct i2c_client *client, int addr)
{
int dic, rev;
dic = i2c_read_register(client, addr, 254);
rev = i2c_read_register(client, addr, 255);
if (dic == 0 || dic == 2) { /* tda9875 and tda9875A */
v4l_info(client, "tda9875%s rev. %d detected at 0x%02x\n",
dic == 0 ? "" : "A", rev, addr << 1);
return 1;
}
v4l_info(client, "no such chip at 0x%02x (dic=0x%x rev=0x%x)\n",
addr << 1, dic, rev);
return 0;
}
static int tda9875_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct tda9875 *t;
struct v4l2_subdev *sd;
v4l_info(client, "chip found @ 0x%02x (%s)\n",
client->addr << 1, client->adapter->name);
if (!tda9875_checkit(client, client->addr))
return -ENODEV;
t = kzalloc(sizeof(*t), GFP_KERNEL);
if (!t)
return -ENOMEM;
sd = &t->sd;
v4l2_i2c_subdev_init(sd, client, &tda9875_ops);
do_tda9875_init(sd);
return 0;
}
static int tda9875_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
do_tda9875_init(sd);
v4l2_device_unregister_subdev(sd);
kfree(to_state(sd));
return 0;
}
static const struct i2c_device_id tda9875_id[] = {
{ "tda9875", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, tda9875_id);
static struct i2c_driver tda9875_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "tda9875",
},
.probe = tda9875_probe,
.remove = tda9875_remove,
.id_table = tda9875_id,
};
static __init int init_tda9875(void)
{
return i2c_add_driver(&tda9875_driver);
}
static __exit void exit_tda9875(void)
{
i2c_del_driver(&tda9875_driver);
}
module_init(init_tda9875);
module_exit(exit_tda9875);
