ASoC: UDA134x codec driver (1cad1de1) · Commits · 戴 / test

include/sound/l3.h

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		#ifndef _L3_H_
		#define _L3_H_ 1

		struct l3_pins {
		void (*setdat)(int);
		void (*setclk)(int);
		void (*setmode)(int);
		int data_hold;
		int data_setup;
		int clock_high;
		int mode_hold;
		int mode;
		int mode_setup;
		};

		int l3_write(struct l3_pins adap, u8 addr, u8 data, int len);

		#endif

include/sound/uda134x.h

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		/*
		* uda134x.h -- UDA134x ALSA SoC Codec driver
		*
		* Copyright 2007 Dension Audio Systems Ltd.
		* Author: Zoltan Devai
		*
		* This program is free software; you can redistribute it and/or modify
		* it under the terms of the GNU General Public License version 2 as
		* published by the Free Software Foundation.
		*/

		#ifndef _UDA134X_H
		#define _UDA134X_H

		#include <sound/l3.h>

		struct uda134x_platform_data {
		struct l3_pins l3;
		void (*power) (int);
		int model;
		#define UDA134X_UDA1340 1
		#define UDA134X_UDA1341 2
		#define UDA134X_UDA1344 3
		};

		#endif /* _UDA134X_H */

sound/soc/codecs/Kconfig

+8 −0

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		@@ -10,6 +10,7 @@ config SND_SOC_ALL_CODECS
		select SND_SOC_TLV320AIC26 if SPI_MASTER
		select SND_SOC_TLV320AIC3X if I2C
		select SND_SOC_TWL4030 if TWL4030_CORE
		select SND_SOC_UDA134X
		select SND_SOC_UDA1380 if I2C
		select SND_SOC_WM8510 if (I2C \|\| SPI_MASTER)
		select SND_SOC_WM8580 if I2C
		@@ -66,6 +67,9 @@ config SND_SOC_CS4270_VD33_ERRATA
		bool
		depends on SND_SOC_CS4270

		config SND_SOC_L3
		tristate

		config SND_SOC_SSM2602
		tristate

		@@ -85,6 +89,10 @@ config SND_SOC_TWL4030
		tristate
		depends on TWL4030_CORE

		config SND_SOC_UDA134X
		tristate
		select SND_SOC_L3

		config SND_SOC_UDA1380
		tristate

sound/soc/codecs/Makefile

+4 −0

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		@@ -3,11 +3,13 @@ snd-soc-ad1980-objs := ad1980.o
		snd-soc-ad73311-objs := ad73311.o
		snd-soc-ak4535-objs := ak4535.o
		snd-soc-cs4270-objs := cs4270.o
		snd-soc-l3-objs := l3.o
		snd-soc-ssm2602-objs := ssm2602.o
		snd-soc-tlv320aic23-objs := tlv320aic23.o
		snd-soc-tlv320aic26-objs := tlv320aic26.o
		snd-soc-tlv320aic3x-objs := tlv320aic3x.o
		snd-soc-twl4030-objs := twl4030.o
		snd-soc-uda134x-objs := uda134x.o
		snd-soc-uda1380-objs := uda1380.o
		snd-soc-wm8510-objs := wm8510.o
		snd-soc-wm8580-objs := wm8580.o
		@@ -27,11 +29,13 @@ obj-$(CONFIG_SND_SOC_AD1980) += snd-soc-ad1980.o
		obj-$(CONFIG_SND_SOC_AD73311) += snd-soc-ad73311.o
		obj-$(CONFIG_SND_SOC_AK4535) += snd-soc-ak4535.o
		obj-$(CONFIG_SND_SOC_CS4270) += snd-soc-cs4270.o
		obj-$(CONFIG_SND_SOC_L3) += snd-soc-l3.o
		obj-$(CONFIG_SND_SOC_SSM2602) += snd-soc-ssm2602.o
		obj-$(CONFIG_SND_SOC_TLV320AIC23) += snd-soc-tlv320aic23.o
		obj-$(CONFIG_SND_SOC_TLV320AIC26) += snd-soc-tlv320aic26.o
		obj-$(CONFIG_SND_SOC_TLV320AIC3X) += snd-soc-tlv320aic3x.o
		obj-$(CONFIG_SND_SOC_TWL4030) += snd-soc-twl4030.o
		obj-$(CONFIG_SND_SOC_UDA134X) += snd-soc-uda134x.o
		obj-$(CONFIG_SND_SOC_UDA1380) += snd-soc-uda1380.o
		obj-$(CONFIG_SND_SOC_WM8510) += snd-soc-wm8510.o
		obj-$(CONFIG_SND_SOC_WM8580) += snd-soc-wm8580.o

sound/soc/codecs/l3.c

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		/*
		* L3 code
		*
		* Copyright (C) 2008, Christian Pellegrin <chripell@evolware.org>
		*
		* This program is free software; you can redistribute it and/or modify
		* it under the terms of the GNU General Public License version 2 as
		* published by the Free Software Foundation.
		*
		*
		* based on:
		*
		* L3 bus algorithm module.
		*
		* Copyright (C) 2001 Russell King, All Rights Reserved.
		*
		*
		*/

		#include <linux/module.h>
		#include <linux/kernel.h>
		#include <linux/delay.h>

		#include <sound/l3.h>

		/*
		* Send one byte of data to the chip. Data is latched into the chip on
		* the rising edge of the clock.
		*/
		static void sendbyte(struct l3_pins *adap, unsigned int byte)
		{
		int i;

		for (i = 0; i < 8; i++) {
		adap->setclk(0);
		udelay(adap->data_hold);
		adap->setdat(byte & 1);
		udelay(adap->data_setup);
		adap->setclk(1);
		udelay(adap->clock_high);
		byte >>= 1;
		}
		}

		/*
		* Send a set of bytes to the chip. We need to pulse the MODE line
		* between each byte, but never at the start nor at the end of the
		* transfer.
		*/
		static void sendbytes(struct l3_pins adap, const u8 buf,
		int len)
		{
		int i;

		for (i = 0; i < len; i++) {
		if (i) {
		udelay(adap->mode_hold);
		adap->setmode(0);
		udelay(adap->mode);
		}
		adap->setmode(1);
		udelay(adap->mode_setup);
		sendbyte(adap, buf[i]);
		}
		}

		int l3_write(struct l3_pins adap, u8 addr, u8 data, int len)
		{
		adap->setclk(1);
		adap->setdat(1);
		adap->setmode(1);
		udelay(adap->mode);

		adap->setmode(0);
		udelay(adap->mode_setup);
		sendbyte(adap, addr);
		udelay(adap->mode_hold);

		sendbytes(adap, data, len);

		adap->setclk(1);
		adap->setdat(1);
		adap->setmode(0);

		return len;
		}
		EXPORT_SYMBOL_GPL(l3_write);

		MODULE_DESCRIPTION("L3 bit-banging driver");
		MODULE_AUTHOR("Christian Pellegrin <chripell@evolware.org>");
		MODULE_LICENSE("GPL");

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