V4L/DVB (6486): m52790: add new Mitsubishi A/V switch i2c driver (761dacd2) · Commits · e / devices / android_kernel_xiaomi_markw

drivers/media/video/Kconfig

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		@@ -119,6 +119,15 @@ config VIDEO_CS53L32A
		To compile this driver as a module, choose M here: the
		module will be called cs53l32a.

		config VIDEO_M52790
		tristate "Mitsubishi M52790 A/V switch"
		depends on VIDEO_V4L2 && I2C && EXPERIMENTAL
		---help---
		Support for the Mitsubishi M52790 A/V switch.

		To compile this driver as a module, choose M here: the
		module will be called m52790.

		config VIDEO_TLV320AIC23B
		tristate "Texas Instruments TLV320AIC23B audio codec"
		depends on VIDEO_V4L2 && I2C && EXPERIMENTAL

drivers/media/video/Makefile

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		@@ -67,6 +67,7 @@ obj-$(CONFIG_VIDEO_TVP5150) += tvp5150.o
		obj-$(CONFIG_VIDEO_PVRUSB2) += pvrusb2/
		obj-$(CONFIG_VIDEO_MSP3400) += msp3400.o
		obj-$(CONFIG_VIDEO_CS53L32A) += cs53l32a.o
		obj-$(CONFIG_VIDEO_M52790) += m52790.o
		obj-$(CONFIG_VIDEO_TLV320AIC23B) += tlv320aic23b.o
		obj-$(CONFIG_VIDEO_WM8775) += wm8775.o
		obj-$(CONFIG_VIDEO_WM8739) += wm8739.o

drivers/media/video/m52790.c

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		/*
		* m52790 i2c ivtv driver.
		* Copyright (C) 2007 Hans Verkuil
		*
		* A/V source switching Mitsubishi M52790SP/FP
		*
		* 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/m52790.h>
		#include <media/v4l2-common.h>
		#include <media/v4l2-chip-ident.h>
		#include <media/v4l2-i2c-drv-legacy.h>

		MODULE_DESCRIPTION("i2c device driver for m52790 A/V switch");
		MODULE_AUTHOR("Hans Verkuil");
		MODULE_LICENSE("GPL");

		static unsigned short normal_i2c[] = { 0x90 >> 1, I2C_CLIENT_END };


		I2C_CLIENT_INSMOD;

		struct m52790_state {
		u16 input;
		u16 output;
		};

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

		static int m52790_write(struct i2c_client *client)
		{
		struct m52790_state *state = i2c_get_clientdata(client);
		u8 sw1 = (state->input \| state->output) & 0xff;
		u8 sw2 = (state->input \| state->output) >> 8;

		return i2c_smbus_write_byte_data(client, sw1, sw2);
		}

		static int m52790_command(struct i2c_client *client, unsigned int cmd,
		void *arg)
		{
		struct m52790_state *state = i2c_get_clientdata(client);
		struct v4l2_routing *route = arg;

		/* Note: audio and video are linked and cannot be switched separately.
		So audio and video routing commands are identical for this chip.
		In theory the video amplifier and audio modes could be handled
		separately for the output, but that seems to be overkill right now.
		The same holds for implementing an audio mute control, this is now
		part of the audio output routing. The normal case is that another
		chip takes care of the actual muting so making it part of the
		output routing seems to be the right thing to do for now. */
		switch (cmd) {
		case VIDIOC_INT_G_AUDIO_ROUTING:
		case VIDIOC_INT_G_VIDEO_ROUTING:
		route->input = state->input;
		route->output = state->output;
		break;

		case VIDIOC_INT_S_AUDIO_ROUTING:
		case VIDIOC_INT_S_VIDEO_ROUTING:
		state->input = route->input;
		state->output = route->output;
		m52790_write(client);
		break;

		#ifdef CONFIG_VIDEO_ADV_DEBUG
		case VIDIOC_DBG_G_REGISTER:
		case VIDIOC_DBG_S_REGISTER:
		{
		struct v4l2_register *reg = arg;

		if (!v4l2_chip_match_i2c_client(client,
		reg->match_type, reg->match_chip))
		return -EINVAL;
		if (!capable(CAP_SYS_ADMIN))
		return -EPERM;
		if (reg->reg != 0)
		return -EINVAL;
		if (cmd == VIDIOC_DBG_G_REGISTER)
		reg->val = state->input \| state->output;
		else {
		state->input = reg->val & 0x0303;
		state->output = reg->val & ~0x0303;
		m52790_write(client);
		}
		break;
		}
		#endif

		case VIDIOC_G_CHIP_IDENT:
		return v4l2_chip_ident_i2c_client(client, arg,
		V4L2_IDENT_M52790, 0);

		case VIDIOC_LOG_STATUS:
		v4l_info(client, "Switch 1: %02x\n",
		(state->input \| state->output) & 0xff);
		v4l_info(client, "Switch 2: %02x\n",
		(state->input \| state->output) >> 8);
		break;

		default:
		return -EINVAL;
		}
		return 0;
		}

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

		/* i2c implementation */

		static int m52790_probe(struct i2c_client *client)
		{
		struct m52790_state *state;

		/* Check if the adapter supports the needed features */
		if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
		return -EIO;

		snprintf(client->name, sizeof(client->name) - 1, "m52790");

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

		state = kmalloc(sizeof(struct m52790_state), GFP_KERNEL);
		if (state == NULL)
		return -ENOMEM;

		state->input = M52790_IN_TUNER;
		state->output = M52790_OUT_STEREO;
		i2c_set_clientdata(client, state);
		m52790_write(client);
		return 0;
		}

		static int m52790_remove(struct i2c_client *client)
		{
		kfree(i2c_get_clientdata(client));
		return 0;
		}

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

		static struct v4l2_i2c_driver_data v4l2_i2c_data = {
		.name = "m52790",
		.driverid = I2C_DRIVERID_M52790,
		.command = m52790_command,
		.probe = m52790_probe,
		.remove = m52790_remove,
		};

include/media/m52790.h

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		/*
		m52790.h - definition for m52790 inputs and outputs

		Copyright (C) 2007 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.
		*/

		#ifndef _M52790_H_
		#define _M52790_H_

		/* Input routing switch 1 */

		#define M52790_SW1_IN_MASK 0x0003
		#define M52790_SW1_IN_TUNER 0x0000
		#define M52790_SW1_IN_V2 0x0001
		#define M52790_SW1_IN_V3 0x0002
		#define M52790_SW1_IN_V4 0x0003

		/* Selects component input instead of composite */
		#define M52790_SW1_YCMIX 0x0004


		/* Input routing switch 2 */

		#define M52790_SW2_IN_MASK 0x0300
		#define M52790_SW2_IN_TUNER 0x0000
		#define M52790_SW2_IN_V2 0x0100
		#define M52790_SW2_IN_V3 0x0200
		#define M52790_SW2_IN_V4 0x0300

		/* Selects component input instead of composite */
		#define M52790_SW2_YCMIX 0x0400


		/* Output routing switch 1 */

		/* Enable 6dB amplifier for composite out */
		#define M52790_SW1_V_AMP 0x0008

		/* Enable 6dB amplifier for component out */
		#define M52790_SW1_YC_AMP 0x0010

		/* Audio output mode */
		#define M52790_SW1_AUDIO_MASK 0x00c0
		#define M52790_SW1_AUDIO_MUTE 0x0000
		#define M52790_SW1_AUDIO_R 0x0040
		#define M52790_SW1_AUDIO_L 0x0080
		#define M52790_SW1_AUDIO_STEREO 0x00c0


		/* Output routing switch 2 */

		/* Enable 6dB amplifier for composite out */
		#define M52790_SW2_V_AMP 0x0800

		/* Enable 6dB amplifier for component out */
		#define M52790_SW2_YC_AMP 0x1000

		/* Audio output mode */
		#define M52790_SW2_AUDIO_MASK 0xc000
		#define M52790_SW2_AUDIO_MUTE 0x0000
		#define M52790_SW2_AUDIO_R 0x4000
		#define M52790_SW2_AUDIO_L 0x8000
		#define M52790_SW2_AUDIO_STEREO 0xc000


		/* Common values */
		#define M52790_IN_TUNER (M52790_SW1_IN_TUNER \| M52790_SW2_IN_TUNER)
		#define M52790_IN_V2 (M52790_SW1_IN_V2 \| M52790_SW2_IN_V2)
		#define M52790_IN_V3 (M52790_SW1_IN_V3 \| M52790_SW2_IN_V3)
		#define M52790_IN_V4 (M52790_SW1_IN_V4 \| M52790_SW2_IN_V4)

		#define M52790_OUT_STEREO (M52790_SW1_AUDIO_STEREO \| \
		M52790_SW2_AUDIO_STEREO)
		#define M52790_OUT_AMP_STEREO (M52790_SW1_AUDIO_STEREO \| \
		M52790_SW1_V_AMP \| \
		M52790_SW2_AUDIO_STEREO \| \
		M52790_SW2_V_AMP)

		#endif

include/media/v4l2-chip-ident.h

+3 −0

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		@@ -83,6 +83,9 @@ enum {
		/* module upd64083: just ident 64083 */
		V4L2_IDENT_UPD64083 = 64083,

		/* module m52790: just ident 52790 */
		V4L2_IDENT_M52790 = 52790,

		/* module msp34xx: reserved range 34000-34999 */
		V4L2_IDENT_MSP3400B = 34002,
		V4L2_IDENT_MSP3410B = 34102,