mirror of https://gitee.com/openkylin/linux.git
[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
parent
1a9ca74d22
commit
f4067fd46a
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/*
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* cs53l32a (Adaptec AVC-2010 and AVC-2410) i2c ivtv driver.
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* Copyright (C) 2005 Martin Vaughan
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*
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* Audio source switching for Adaptec AVC-2410 added by Trev Jackson
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/ioctl.h>
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#include <asm/uaccess.h>
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#include <linux/i2c.h>
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#include <linux/videodev.h>
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#include <media/audiochip.h>
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#include <media/id.h>
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MODULE_DESCRIPTION("i2c device driver for cs53l32a Audio ADC");
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MODULE_AUTHOR("Martin Vaughan");
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MODULE_LICENSE("GPL");
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static int debug = 0;
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module_param(debug, bool, 0644);
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MODULE_PARM_DESC(debug, "Debugging messages\n\t\t\t0=Off (default), 1=On");
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#define cs53l32a_dbg(fmt, arg...) \
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do { \
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if (debug) \
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printk(KERN_INFO "%s debug %d-%04x: " fmt, client->driver->name, \
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i2c_adapter_id(client->adapter), client->addr , ## arg); \
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} while (0)
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#define cs53l32a_err(fmt, arg...) do { \
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printk(KERN_ERR "%s %d-%04x: " fmt, client->driver->name, \
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i2c_adapter_id(client->adapter), client->addr , ## arg); } while (0)
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#define cs53l32a_info(fmt, arg...) do { \
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printk(KERN_INFO "%s %d-%04x: " fmt, client->driver->name, \
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i2c_adapter_id(client->adapter), client->addr , ## arg); } while (0)
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static unsigned short normal_i2c[] = { 0x22 >> 1, I2C_CLIENT_END };
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I2C_CLIENT_INSMOD;
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/* ----------------------------------------------------------------------- */
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static int cs53l32a_write(struct i2c_client *client, u8 reg, u8 value)
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{
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return i2c_smbus_write_byte_data(client, reg, value);
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}
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static int cs53l32a_read(struct i2c_client *client, u8 reg)
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{
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return i2c_smbus_read_byte_data(client, reg);
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}
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static int cs53l32a_command(struct i2c_client *client, unsigned int cmd,
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void *arg)
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{
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int *input = arg;
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switch (cmd) {
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case AUDC_SET_INPUT:
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switch (*input) {
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case AUDIO_TUNER:
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cs53l32a_write(client, 0x01, 0x01);
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break;
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case AUDIO_EXTERN:
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cs53l32a_write(client, 0x01, 0x21);
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break;
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case AUDIO_MUTE:
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cs53l32a_write(client, 0x03, 0xF0);
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break;
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case AUDIO_UNMUTE:
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cs53l32a_write(client, 0x03, 0x30);
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break;
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default:
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cs53l32a_err("Invalid input %d.\n", *input);
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return -EINVAL;
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}
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break;
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case VIDIOC_S_CTRL:
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{
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struct v4l2_control *ctrl = arg;
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if (ctrl->id != V4L2_CID_AUDIO_VOLUME)
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return -EINVAL;
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if (ctrl->value > 12 || ctrl->value < -90)
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return -EINVAL;
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cs53l32a_write(client, 0x04, (u8) ctrl->value);
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cs53l32a_write(client, 0x05, (u8) ctrl->value);
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break;
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}
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case VIDIOC_LOG_STATUS:
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{
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u8 v = cs53l32a_read(client, 0x01);
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u8 m = cs53l32a_read(client, 0x03);
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cs53l32a_info("Input: %s%s\n",
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v == 0x21 ? "external line in" : "tuner",
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(m & 0xC0) ? " (muted)" : "");
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break;
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}
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default:
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return -EINVAL;
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}
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return 0;
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}
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/* ----------------------------------------------------------------------- */
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/* i2c implementation */
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/*
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* Generic i2c probe
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* concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
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*/
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static struct i2c_driver i2c_driver;
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static int cs53l32a_attach(struct i2c_adapter *adapter, int address, int kind)
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{
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struct i2c_client *client;
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int i;
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/* Check if the adapter supports the needed features */
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if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
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return 0;
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client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
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if (client == 0)
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return -ENOMEM;
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memset(client, 0, sizeof(struct i2c_client));
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client->addr = address;
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client->adapter = adapter;
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client->driver = &i2c_driver;
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client->flags = I2C_CLIENT_ALLOW_USE;
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snprintf(client->name, sizeof(client->name) - 1, "cs53l32a");
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cs53l32a_info("chip found @ 0x%x (%s)\n", address << 1, adapter->name);
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for (i = 1; i <= 7; i++) {
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u8 v = cs53l32a_read(client, i);
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cs53l32a_dbg("Read Reg %d %02x\n", i, v);
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}
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/* Set cs53l32a internal register for Adaptec 2010/2410 setup */
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cs53l32a_write(client, 0x01, (u8) 0x21);
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cs53l32a_write(client, 0x02, (u8) 0x29);
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cs53l32a_write(client, 0x03, (u8) 0x30);
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cs53l32a_write(client, 0x04, (u8) 0x00);
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cs53l32a_write(client, 0x05, (u8) 0x00);
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cs53l32a_write(client, 0x06, (u8) 0x00);
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cs53l32a_write(client, 0x07, (u8) 0x00);
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/* Display results, should be 0x21,0x29,0x30,0x00,0x00,0x00,0x00 */
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for (i = 1; i <= 7; i++) {
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u8 v = cs53l32a_read(client, i);
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cs53l32a_dbg("Read Reg %d %02x\n", i, v);
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}
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i2c_attach_client(client);
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return 0;
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}
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static int cs53l32a_probe(struct i2c_adapter *adapter)
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{
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return i2c_probe(adapter, &addr_data, cs53l32a_attach);
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}
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static int cs53l32a_detach(struct i2c_client *client)
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{
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int err;
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err = i2c_detach_client(client);
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if (err) {
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return err;
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}
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kfree(client);
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return 0;
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}
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/* ----------------------------------------------------------------------- */
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/* i2c implementation */
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static struct i2c_driver i2c_driver = {
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.name = "cs53l32a",
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.id = I2C_DRIVERID_CS53L32A,
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.flags = I2C_DF_NOTIFY,
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.attach_adapter = cs53l32a_probe,
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.detach_client = cs53l32a_detach,
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.command = cs53l32a_command,
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.owner = THIS_MODULE,
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};
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static int __init cs53l32a_init_module(void)
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{
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return i2c_add_driver(&i2c_driver);
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}
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static void __exit cs53l32a_cleanup_module(void)
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{
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i2c_del_driver(&i2c_driver);
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}
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module_init(cs53l32a_init_module);
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module_exit(cs53l32a_cleanup_module);
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