V4L/DVB (4048): Add support for the Texas Instruments TLV320AIC23B audio codec
Signed-off-by: Scott Alfter <salfter@ssai.us> Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Scott Alfter
Mauro Carvalho Chehab
parent
a22f1cbc2d
commit
88ca8ed0b7
4 changed files with 228 additions and 0 deletions
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@ -363,6 +363,15 @@ config VIDEO_CS53L32A
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To compile this driver as a module, choose M here: the
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module will be called cs53l32a.
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config VIDEO_TLV320AIC23B
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tristate "Texas Instruments TLV320AIC23B audio codec"
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depends on VIDEO_DEV && I2C && EXPERIMENTAL
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---help---
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Support for the Texas Instruments TLV320AIC23B audio codec.
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To compile this driver as a module, choose M here: the
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module will be called tlv320aic23b.
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config VIDEO_WM8775
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tristate "Wolfson Microelectronics WM8775 audio ADC with input mixer"
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depends on VIDEO_DEV && I2C && EXPERIMENTAL
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@ -49,6 +49,7 @@ obj-$(CONFIG_VIDEO_EM28XX) += em28xx/
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obj-$(CONFIG_VIDEO_EM28XX) += tvp5150.o
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obj-$(CONFIG_VIDEO_MSP3400) += msp3400.o
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obj-$(CONFIG_VIDEO_CS53L32A) += cs53l32a.o
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obj-$(CONFIG_VIDEO_TLV320AIC23B) += tlv320aic23b.o
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obj-$(CONFIG_VIDEO_WM8775) += wm8775.o
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obj-$(CONFIG_VIDEO_WM8739) += wm8739.o
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obj-$(CONFIG_VIDEO_OVCAMCHIP) += ovcamchip/
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217
drivers/media/video/tlv320aic23b.c
Normal file
217
drivers/media/video/tlv320aic23b.c
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@ -0,0 +1,217 @@
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/*
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* tlv320aic23b - driver version 0.0.1
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*
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* Copyright (C) 2006 Scott Alfter <salfter@ssai.us>
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*
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* Based on wm8775 driver
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*
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* Copyright (C) 2004 Ulf Eklund <ivtv at eklund.to>
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* Copyright (C) 2005 Hans Verkuil <hverkuil@xs4all.nl>
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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/i2c-id.h>
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#include <linux/videodev.h>
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#include <media/v4l2-common.h>
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MODULE_DESCRIPTION("tlv320aic23b driver");
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MODULE_AUTHOR("Scott Alfter, Ulf Eklund, Hans Verkuil");
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MODULE_LICENSE("GPL");
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static unsigned short normal_i2c[] = { 0x34 >> 1, I2C_CLIENT_END };
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I2C_CLIENT_INSMOD;
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/* ----------------------------------------------------------------------- */
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struct tlv320aic23b_state {
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u8 muted;
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};
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static int tlv320aic23b_write(struct i2c_client *client, int reg, u16 val)
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{
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int i;
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if ((reg < 0 || reg > 9) && (reg != 15)) {
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v4l_err(client, "Invalid register R%d\n", reg);
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return -1;
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}
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for (i = 0; i < 3; i++) {
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if (i2c_smbus_write_byte_data(client, (reg << 1) |
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(val >> 8), val & 0xff) == 0) {
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return 0;
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}
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}
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v4l_err(client, "I2C: cannot write %03x to register R%d\n", val, reg);
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return -1;
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}
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static int tlv320aic23b_command(struct i2c_client *client, unsigned int cmd,
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void *arg)
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{
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struct tlv320aic23b_state *state = i2c_get_clientdata(client);
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struct v4l2_control *ctrl = arg;
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u32* freq = arg;
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switch (cmd) {
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case VIDIOC_INT_AUDIO_CLOCK_FREQ:
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switch (*freq) {
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case 32000: /* set sample rate to 32 kHz */
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tlv320aic23b_write(client, 8, 0x018);
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break;
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case 44100: /* set sample rate to 44.1 kHz */
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tlv320aic23b_write(client, 8, 0x022);
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break;
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case 48000: /* set sample rate to 48 kHz */
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tlv320aic23b_write(client, 8, 0x000);
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break;
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default:
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return -EINVAL;
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}
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break;
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case VIDIOC_G_CTRL:
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if (ctrl->id != V4L2_CID_AUDIO_MUTE)
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return -EINVAL;
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ctrl->value = state->muted;
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break;
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case VIDIOC_S_CTRL:
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if (ctrl->id != V4L2_CID_AUDIO_MUTE)
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return -EINVAL;
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state->muted = ctrl->value;
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tlv320aic23b_write(client, 0, 0x180); /* mute both channels */
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/* set gain on both channels to +3.0 dB */
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if (!state->muted)
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tlv320aic23b_write(client, 0, 0x119);
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break;
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case VIDIOC_LOG_STATUS:
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v4l_info(client, "Input: %s\n",
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state->muted ? "muted" : "active");
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break;
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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 tlv320aic23b_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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struct tlv320aic23b_state *state;
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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 = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
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if (client == 0)
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return -ENOMEM;
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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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snprintf(client->name, sizeof(client->name) - 1, "tlv320aic23b");
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v4l_info(client, "chip found @ 0x%x (%s)\n", address << 1, adapter->name);
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state = kmalloc(sizeof(struct tlv320aic23b_state), GFP_KERNEL);
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if (state == NULL) {
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kfree(client);
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return -ENOMEM;
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}
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state->muted = 0;
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i2c_set_clientdata(client, state);
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/* initialize tlv320aic23b */
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tlv320aic23b_write(client, 15, 0x000); /* RESET */
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tlv320aic23b_write(client, 6, 0x00A); /* turn off DAC & mic input */
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tlv320aic23b_write(client, 7, 0x049); /* left-justified, 24-bit, master mode */
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tlv320aic23b_write(client, 0, 0x119); /* set gain on both channels to +3.0 dB */
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tlv320aic23b_write(client, 8, 0x000); /* set sample rate to 48 kHz */
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tlv320aic23b_write(client, 9, 0x001); /* activate digital interface */
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i2c_attach_client(client);
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return 0;
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}
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static int tlv320aic23b_probe(struct i2c_adapter *adapter)
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{
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if (adapter->class & I2C_CLASS_TV_ANALOG)
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return i2c_probe(adapter, &addr_data, tlv320aic23b_attach);
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return 0;
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}
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static int tlv320aic23b_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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.driver = {
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.name = "tlv320aic23b",
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},
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.id = I2C_DRIVERID_TLV320AIC23B,
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.attach_adapter = tlv320aic23b_probe,
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.detach_client = tlv320aic23b_detach,
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.command = tlv320aic23b_command,
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};
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static int __init tlv320aic23b_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 tlv320aic23b_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(tlv320aic23b_init_module);
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module_exit(tlv320aic23b_cleanup_module);
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@ -114,6 +114,7 @@
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#define I2C_DRIVERID_RS5C372 84 /* Ricoh RS5C372 RTC */
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#define I2C_DRIVERID_BT866 85 /* Conexant bt866 video encoder */
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#define I2C_DRIVERID_KS0127 86 /* Samsung ks0127 video decoder */
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#define I2C_DRIVERID_TLV320AIC23B 87 /* TI TLV320AIC23B audio codec */
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#define I2C_DRIVERID_I2CDEV 900
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#define I2C_DRIVERID_ARP 902 /* SMBus ARP Client */
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