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/*
* cs53l32a (Adaptec AVC-2010 and AVC-2410) i2c ivtv driver.
* Copyright (C) 2005 Martin Vaughan
*
* Audio source switching for Adaptec AVC-2410 added by Trev Jackson
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/ioctl.h>
#include <asm/uaccess.h>
#include <linux/i2c.h>
#include <linux/i2c-id.h>
#include <linux/videodev.h>
#include <media/audiochip.h>
MODULE_DESCRIPTION("i2c device driver for cs53l32a Audio ADC");
MODULE_AUTHOR("Martin Vaughan");
MODULE_LICENSE("GPL");
static int debug = 0;
module_param(debug, bool, 0644);
MODULE_PARM_DESC(debug, "Debugging messages\n\t\t\t0=Off (default), 1=On");
#define cs53l32a_dbg(fmt, arg...) \
do { \
if (debug) \
printk(KERN_INFO "%s debug %d-%04x: " fmt, \
client->driver->driver.name, \
i2c_adapter_id(client->adapter), client->addr , ## arg); \
} while (0)
#define cs53l32a_err(fmt, arg...) do { \
printk(KERN_ERR "%s %d-%04x: " fmt, client->driver->driver.name, \
i2c_adapter_id(client->adapter), client->addr , ## arg); } while (0)
#define cs53l32a_info(fmt, arg...) do { \
printk(KERN_INFO "%s %d-%04x: " fmt, client->driver->driver.name, \
i2c_adapter_id(client->adapter), client->addr , ## arg); } while (0)
static unsigned short normal_i2c[] = { 0x22 >> 1, I2C_CLIENT_END };
I2C_CLIENT_INSMOD;
/* ----------------------------------------------------------------------- */
static int cs53l32a_write(struct i2c_client *client, u8 reg, u8 value)
{
return i2c_smbus_write_byte_data(client, reg, value);
}
static int cs53l32a_read(struct i2c_client *client, u8 reg)
{
return i2c_smbus_read_byte_data(client, reg);
}
static int cs53l32a_command(struct i2c_client *client, unsigned int cmd,
void *arg)
{
int *input = arg;
switch (cmd) {
case AUDC_SET_INPUT:
switch (*input) {
case AUDIO_TUNER:
cs53l32a_write(client, 0x01, 0x01);
break;
case AUDIO_EXTERN:
cs53l32a_write(client, 0x01, 0x21);
break;
case AUDIO_MUTE:
cs53l32a_write(client, 0x03, 0xF0);
break;
case AUDIO_UNMUTE:
cs53l32a_write(client, 0x03, 0x30);
break;
default:
cs53l32a_err("Invalid input %d.\n", *input);
return -EINVAL;
}
break;
case VIDIOC_S_CTRL:
{
struct v4l2_control *ctrl = arg;
if (ctrl->id != V4L2_CID_AUDIO_VOLUME)
return -EINVAL;
if (ctrl->value > 12 || ctrl->value < -90)
return -EINVAL;
cs53l32a_write(client, 0x04, (u8) ctrl->value);
cs53l32a_write(client, 0x05, (u8) ctrl->value);
break;
}
case VIDIOC_LOG_STATUS:
{
u8 v = cs53l32a_read(client, 0x01);
u8 m = cs53l32a_read(client, 0x03);
cs53l32a_info("Input: %s%s\n",
v == 0x21 ? "external line in" : "tuner",
(m & 0xC0) ? " (muted)" : "");
break;
}
default:
return -EINVAL;
}
return 0;
}
/* ----------------------------------------------------------------------- */
/* i2c implementation */
/*
* Generic i2c probe
* concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
*/
static struct i2c_driver i2c_driver;
static int cs53l32a_attach(struct i2c_adapter *adapter, int address, int kind)
{
struct i2c_client *client;
int i;
/* Check if the adapter supports the needed features */
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return 0;
client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
if (client == 0)
return -ENOMEM;
memset(client, 0, sizeof(struct i2c_client));
client->addr = address;
client->adapter = adapter;
client->driver = &i2c_driver;
snprintf(client->name, sizeof(client->name) - 1, "cs53l32a");
cs53l32a_info("chip found @ 0x%x (%s)\n", address << 1, adapter->name);
for (i = 1; i <= 7; i++) {
u8 v = cs53l32a_read(client, i);
cs53l32a_dbg("Read Reg %d %02x\n", i, v);
}
/* Set cs53l32a internal register for Adaptec 2010/2410 setup */
cs53l32a_write(client, 0x01, (u8) 0x21);
cs53l32a_write(client, 0x02, (u8) 0x29);
cs53l32a_write(client, 0x03, (u8) 0x30);
cs53l32a_write(client, 0x04, (u8) 0x00);
cs53l32a_write(client, 0x05, (u8) 0x00);
cs53l32a_write(client, 0x06, (u8) 0x00);
cs53l32a_write(client, 0x07, (u8) 0x00);
/* Display results, should be 0x21,0x29,0x30,0x00,0x00,0x00,0x00 */
for (i = 1; i <= 7; i++) {
u8 v = cs53l32a_read(client, i);
cs53l32a_dbg("Read Reg %d %02x\n", i, v);
}
i2c_attach_client(client);
return 0;
}
static int cs53l32a_probe(struct i2c_adapter *adapter)
{
if (adapter->class & I2C_CLASS_TV_ANALOG)
return i2c_probe(adapter, &addr_data, cs53l32a_attach);
return 0;
}
static int cs53l32a_detach(struct i2c_client *client)
{
int err;
err = i2c_detach_client(client);
if (err) {
return err;
}
kfree(client);
return 0;
}
/* ----------------------------------------------------------------------- */
/* i2c implementation */
static struct i2c_driver i2c_driver = {
.driver = {
.name = "cs53l32a",
},
.id = I2C_DRIVERID_CS53L32A,
.attach_adapter = cs53l32a_probe,
.detach_client = cs53l32a_detach,
.command = cs53l32a_command,
};
static int __init cs53l32a_init_module(void)
{
return i2c_add_driver(&i2c_driver);
}
static void __exit cs53l32a_cleanup_module(void)
{
i2c_del_driver(&i2c_driver);
}
module_init(cs53l32a_init_module);
module_exit(cs53l32a_cleanup_module);
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