[PATCH] v4l: 816: added driver for cirrus logic low voltage stereo a-d converter
- Added driver for Cirrus Logic Low Voltage Stereo A/D Converter. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@brturbo.com.br> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Hans Verkuil
Linus Torvalds
Родитель
1a9ca74d22
Коммит
f4067fd46a
|
|
@ -0,0 +1,234 @@
|
|||
/*
|
||||
* 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/videodev.h>
|
||||
#include <media/audiochip.h>
|
||||
#include <media/id.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->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->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->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;
|
||||
client->flags = I2C_CLIENT_ALLOW_USE;
|
||||
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)
|
||||
{
|
||||
return i2c_probe(adapter, &addr_data, cs53l32a_attach);
|
||||
}
|
||||
|
||||
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 = {
|
||||
.name = "cs53l32a",
|
||||
.id = I2C_DRIVERID_CS53L32A,
|
||||
.flags = I2C_DF_NOTIFY,
|
||||
.attach_adapter = cs53l32a_probe,
|
||||
.detach_client = cs53l32a_detach,
|
||||
.command = cs53l32a_command,
|
||||
.owner = THIS_MODULE,
|
||||
};
|
||||
|
||||
|
||||
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);
|
||||
Загрузка…
Ссылка в новой задаче