V4L/DVB (4048): Add support for the Texas Instruments TLV320AIC23B audio codec (88ca8ed0) · Commits · e / devices / android_kernel_teracube_2e

drivers/media/video/Kconfig

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Original line number	Diff line number	Diff line
		@@ -363,6 +363,15 @@ config VIDEO_CS53L32A
		To compile this driver as a module, choose M here: the
		module will be called cs53l32a.

		config VIDEO_TLV320AIC23B
		tristate "Texas Instruments TLV320AIC23B audio codec"
		depends on VIDEO_DEV && I2C && EXPERIMENTAL
		---help---
		Support for the Texas Instruments TLV320AIC23B audio codec.

		To compile this driver as a module, choose M here: the
		module will be called tlv320aic23b.

		config VIDEO_WM8775
		tristate "Wolfson Microelectronics WM8775 audio ADC with input mixer"
		depends on VIDEO_DEV && I2C && EXPERIMENTAL

drivers/media/video/Makefile

+1 −0

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		@@ -49,6 +49,7 @@ obj-$(CONFIG_VIDEO_EM28XX) += em28xx/
		obj-$(CONFIG_VIDEO_EM28XX) += tvp5150.o
		obj-$(CONFIG_VIDEO_MSP3400) += msp3400.o
		obj-$(CONFIG_VIDEO_CS53L32A) += cs53l32a.o
		obj-$(CONFIG_VIDEO_TLV320AIC23B) += tlv320aic23b.o
		obj-$(CONFIG_VIDEO_WM8775) += wm8775.o
		obj-$(CONFIG_VIDEO_WM8739) += wm8739.o
		obj-$(CONFIG_VIDEO_OVCAMCHIP) += ovcamchip/

drivers/media/video/tlv320aic23b.c

0 → 100644

+217 −0

Original line number	Diff line number	Diff line
		/*
		* tlv320aic23b - driver version 0.0.1
		*
		* Copyright (C) 2006 Scott Alfter <salfter@ssai.us>
		*
		* Based on wm8775 driver
		*
		* Copyright (C) 2004 Ulf Eklund <ivtv at eklund.to>
		* Copyright (C) 2005 Hans Verkuil <hverkuil@xs4all.nl>
		*
		* 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/v4l2-common.h>

		MODULE_DESCRIPTION("tlv320aic23b driver");
		MODULE_AUTHOR("Scott Alfter, Ulf Eklund, Hans Verkuil");
		MODULE_LICENSE("GPL");

		static unsigned short normal_i2c[] = { 0x34 >> 1, I2C_CLIENT_END };


		I2C_CLIENT_INSMOD;

		/* ----------------------------------------------------------------------- */

		struct tlv320aic23b_state {
		u8 muted;
		};

		static int tlv320aic23b_write(struct i2c_client *client, int reg, u16 val)
		{
		int i;

		if ((reg < 0 \|\| reg > 9) && (reg != 15)) {
		v4l_err(client, "Invalid register R%d\n", reg);
		return -1;
		}

		for (i = 0; i < 3; i++) {
		if (i2c_smbus_write_byte_data(client, (reg << 1) \|
		(val >> 8), val & 0xff) == 0) {
		return 0;
		}
		}
		v4l_err(client, "I2C: cannot write %03x to register R%d\n", val, reg);
		return -1;
		}

		static int tlv320aic23b_command(struct i2c_client *client, unsigned int cmd,
		void *arg)
		{
		struct tlv320aic23b_state *state = i2c_get_clientdata(client);
		struct v4l2_control *ctrl = arg;
		u32* freq = arg;

		switch (cmd) {
		case VIDIOC_INT_AUDIO_CLOCK_FREQ:
		switch (*freq) {
		case 32000: /* set sample rate to 32 kHz */
		tlv320aic23b_write(client, 8, 0x018);
		break;
		case 44100: /* set sample rate to 44.1 kHz */
		tlv320aic23b_write(client, 8, 0x022);
		break;
		case 48000: /* set sample rate to 48 kHz */
		tlv320aic23b_write(client, 8, 0x000);
		break;
		default:
		return -EINVAL;
		}
		break;

		case VIDIOC_G_CTRL:
		if (ctrl->id != V4L2_CID_AUDIO_MUTE)
		return -EINVAL;
		ctrl->value = state->muted;
		break;

		case VIDIOC_S_CTRL:
		if (ctrl->id != V4L2_CID_AUDIO_MUTE)
		return -EINVAL;
		state->muted = ctrl->value;
		tlv320aic23b_write(client, 0, 0x180); /* mute both channels */
		/* set gain on both channels to +3.0 dB */
		if (!state->muted)
		tlv320aic23b_write(client, 0, 0x119);
		break;

		case VIDIOC_LOG_STATUS:
		v4l_info(client, "Input: %s\n",
		state->muted ? "muted" : "active");
		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 tlv320aic23b_attach(struct i2c_adapter *adapter, int address, int kind)
		{
		struct i2c_client *client;
		struct tlv320aic23b_state *state;

		/* Check if the adapter supports the needed features */
		if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
		return 0;

		client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
		if (client == 0)
		return -ENOMEM;

		client->addr = address;
		client->adapter = adapter;
		client->driver = &i2c_driver;
		snprintf(client->name, sizeof(client->name) - 1, "tlv320aic23b");

		v4l_info(client, "chip found @ 0x%x (%s)\n", address << 1, adapter->name);

		state = kmalloc(sizeof(struct tlv320aic23b_state), GFP_KERNEL);
		if (state == NULL) {
		kfree(client);
		return -ENOMEM;
		}
		state->muted = 0;
		i2c_set_clientdata(client, state);

		/* initialize tlv320aic23b */
		tlv320aic23b_write(client, 15, 0x000); /* RESET */
		tlv320aic23b_write(client, 6, 0x00A); /* turn off DAC & mic input */
		tlv320aic23b_write(client, 7, 0x049); /* left-justified, 24-bit, master mode */
		tlv320aic23b_write(client, 0, 0x119); /* set gain on both channels to +3.0 dB */
		tlv320aic23b_write(client, 8, 0x000); /* set sample rate to 48 kHz */
		tlv320aic23b_write(client, 9, 0x001); /* activate digital interface */

		i2c_attach_client(client);

		return 0;
		}

		static int tlv320aic23b_probe(struct i2c_adapter *adapter)
		{
		if (adapter->class & I2C_CLASS_TV_ANALOG)
		return i2c_probe(adapter, &addr_data, tlv320aic23b_attach);
		return 0;
		}

		static int tlv320aic23b_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 = "tlv320aic23b",
		},
		.id = I2C_DRIVERID_TLV320AIC23B,
		.attach_adapter = tlv320aic23b_probe,
		.detach_client = tlv320aic23b_detach,
		.command = tlv320aic23b_command,
		};


		static int __init tlv320aic23b_init_module(void)
		{
		return i2c_add_driver(&i2c_driver);
		}

		static void __exit tlv320aic23b_cleanup_module(void)
		{
		i2c_del_driver(&i2c_driver);
		}

		module_init(tlv320aic23b_init_module);
		module_exit(tlv320aic23b_cleanup_module);

include/linux/i2c-id.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -114,6 +114,7 @@
		#define I2C_DRIVERID_RS5C372 84 /* Ricoh RS5C372 RTC */
		#define I2C_DRIVERID_BT866 85 /* Conexant bt866 video encoder */
		#define I2C_DRIVERID_KS0127 86 /* Samsung ks0127 video decoder */
		#define I2C_DRIVERID_TLV320AIC23B 87 /* TI TLV320AIC23B audio codec */

		#define I2C_DRIVERID_I2CDEV 900
		#define I2C_DRIVERID_ARP 902 /* SMBus ARP Client */