258 lines
6.6 KiB
C
258 lines
6.6 KiB
C
/*
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* ASoC driver for TI DAVINCI EVM platform
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*
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* Author: Vladimir Barinov, <vbarinov@embeddedalley.com>
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* Copyright: (C) 2007 MontaVista Software, Inc., <source@mvista.com>
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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 version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/timer.h>
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#include <linux/interrupt.h>
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#include <linux/platform_device.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/soc.h>
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#include <sound/soc-dapm.h>
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#include <asm/dma.h>
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#include <asm/mach-types.h>
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#include <mach/asp.h>
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#include <mach/edma.h>
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#include <mach/mux.h>
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#include "../codecs/tlv320aic3x.h"
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#include "davinci-pcm.h"
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#include "davinci-i2s.h"
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#define AUDIO_FORMAT (SND_SOC_DAIFMT_DSP_B | \
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SND_SOC_DAIFMT_CBM_CFM | SND_SOC_DAIFMT_IB_NF)
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static int evm_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
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struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
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int ret = 0;
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unsigned sysclk;
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/* ASP1 on DM355 EVM is clocked by an external oscillator */
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if (machine_is_davinci_dm355_evm())
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sysclk = 27000000;
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/* ASP0 in DM6446 EVM is clocked by U55, as configured by
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* board-dm644x-evm.c using GPIOs from U18. There are six
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* options; here we "know" we use a 48 KHz sample rate.
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*/
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else if (machine_is_davinci_evm())
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sysclk = 12288000;
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else
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return -EINVAL;
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/* set codec DAI configuration */
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ret = snd_soc_dai_set_fmt(codec_dai, AUDIO_FORMAT);
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if (ret < 0)
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return ret;
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/* set cpu DAI configuration */
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ret = snd_soc_dai_set_fmt(cpu_dai, AUDIO_FORMAT);
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if (ret < 0)
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return ret;
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/* set the codec system clock */
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ret = snd_soc_dai_set_sysclk(codec_dai, 0, sysclk, SND_SOC_CLOCK_OUT);
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if (ret < 0)
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return ret;
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return 0;
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}
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static struct snd_soc_ops evm_ops = {
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.hw_params = evm_hw_params,
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};
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/* davinci-evm machine dapm widgets */
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static const struct snd_soc_dapm_widget aic3x_dapm_widgets[] = {
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SND_SOC_DAPM_HP("Headphone Jack", NULL),
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SND_SOC_DAPM_LINE("Line Out", NULL),
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SND_SOC_DAPM_MIC("Mic Jack", NULL),
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SND_SOC_DAPM_LINE("Line In", NULL),
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};
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/* davinci-evm machine audio_mapnections to the codec pins */
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static const struct snd_soc_dapm_route audio_map[] = {
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/* Headphone connected to HPLOUT, HPROUT */
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{"Headphone Jack", NULL, "HPLOUT"},
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{"Headphone Jack", NULL, "HPROUT"},
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/* Line Out connected to LLOUT, RLOUT */
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{"Line Out", NULL, "LLOUT"},
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{"Line Out", NULL, "RLOUT"},
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/* Mic connected to (MIC3L | MIC3R) */
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{"MIC3L", NULL, "Mic Bias 2V"},
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{"MIC3R", NULL, "Mic Bias 2V"},
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{"Mic Bias 2V", NULL, "Mic Jack"},
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/* Line In connected to (LINE1L | LINE2L), (LINE1R | LINE2R) */
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{"LINE1L", NULL, "Line In"},
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{"LINE2L", NULL, "Line In"},
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{"LINE1R", NULL, "Line In"},
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{"LINE2R", NULL, "Line In"},
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};
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/* Logic for a aic3x as connected on a davinci-evm */
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static int evm_aic3x_init(struct snd_soc_codec *codec)
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{
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/* Add davinci-evm specific widgets */
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snd_soc_dapm_new_controls(codec, aic3x_dapm_widgets,
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ARRAY_SIZE(aic3x_dapm_widgets));
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/* Set up davinci-evm specific audio path audio_map */
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snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
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/* not connected */
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snd_soc_dapm_disable_pin(codec, "MONO_LOUT");
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snd_soc_dapm_disable_pin(codec, "HPLCOM");
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snd_soc_dapm_disable_pin(codec, "HPRCOM");
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/* always connected */
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snd_soc_dapm_enable_pin(codec, "Headphone Jack");
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snd_soc_dapm_enable_pin(codec, "Line Out");
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snd_soc_dapm_enable_pin(codec, "Mic Jack");
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snd_soc_dapm_enable_pin(codec, "Line In");
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snd_soc_dapm_sync(codec);
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return 0;
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}
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/* davinci-evm digital audio interface glue - connects codec <--> CPU */
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static struct snd_soc_dai_link evm_dai = {
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.name = "TLV320AIC3X",
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.stream_name = "AIC3X",
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.cpu_dai = &davinci_i2s_dai,
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.codec_dai = &aic3x_dai,
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.init = evm_aic3x_init,
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.ops = &evm_ops,
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};
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/* davinci-evm audio machine driver */
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static struct snd_soc_card snd_soc_card_evm = {
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.name = "DaVinci EVM",
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.platform = &davinci_soc_platform,
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.dai_link = &evm_dai,
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.num_links = 1,
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};
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/* evm audio private data */
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static struct aic3x_setup_data evm_aic3x_setup = {
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.i2c_bus = 1,
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.i2c_address = 0x1b,
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};
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/* evm audio subsystem */
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static struct snd_soc_device evm_snd_devdata = {
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.card = &snd_soc_card_evm,
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.codec_dev = &soc_codec_dev_aic3x,
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.codec_data = &evm_aic3x_setup,
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};
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/* DM6446 EVM uses ASP0; line-out is a pair of RCA jacks */
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static struct resource evm_snd_resources[] = {
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{
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.start = DAVINCI_ASP0_BASE,
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.end = DAVINCI_ASP0_BASE + SZ_8K - 1,
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.flags = IORESOURCE_MEM,
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},
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};
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static struct evm_snd_platform_data evm_snd_data = {
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.tx_dma_ch = DAVINCI_DMA_ASP0_TX,
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.rx_dma_ch = DAVINCI_DMA_ASP0_RX,
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};
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/* DM335 EVM uses ASP1; line-out is a stereo mini-jack */
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static struct resource dm335evm_snd_resources[] = {
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{
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.start = DAVINCI_ASP1_BASE,
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.end = DAVINCI_ASP1_BASE + SZ_8K - 1,
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.flags = IORESOURCE_MEM,
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},
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};
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static struct evm_snd_platform_data dm335evm_snd_data = {
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.tx_dma_ch = DAVINCI_DMA_ASP1_TX,
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.rx_dma_ch = DAVINCI_DMA_ASP1_RX,
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};
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static struct platform_device *evm_snd_device;
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static int __init evm_init(void)
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{
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struct resource *resources;
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unsigned num_resources;
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struct evm_snd_platform_data *data;
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int index;
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int ret;
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if (machine_is_davinci_evm()) {
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davinci_cfg_reg(DM644X_MCBSP);
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resources = evm_snd_resources;
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num_resources = ARRAY_SIZE(evm_snd_resources);
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data = &evm_snd_data;
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index = 0;
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} else if (machine_is_davinci_dm355_evm()) {
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/* we don't use ASP1 IRQs, or we'd need to mux them ... */
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davinci_cfg_reg(DM355_EVT8_ASP1_TX);
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davinci_cfg_reg(DM355_EVT9_ASP1_RX);
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resources = dm335evm_snd_resources;
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num_resources = ARRAY_SIZE(dm335evm_snd_resources);
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data = &dm335evm_snd_data;
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index = 1;
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} else
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return -EINVAL;
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evm_snd_device = platform_device_alloc("soc-audio", index);
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if (!evm_snd_device)
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return -ENOMEM;
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platform_set_drvdata(evm_snd_device, &evm_snd_devdata);
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evm_snd_devdata.dev = &evm_snd_device->dev;
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platform_device_add_data(evm_snd_device, data, sizeof(*data));
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ret = platform_device_add_resources(evm_snd_device, resources,
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num_resources);
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if (ret) {
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platform_device_put(evm_snd_device);
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return ret;
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}
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ret = platform_device_add(evm_snd_device);
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if (ret)
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platform_device_put(evm_snd_device);
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return ret;
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}
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static void __exit evm_exit(void)
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{
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platform_device_unregister(evm_snd_device);
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}
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module_init(evm_init);
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module_exit(evm_exit);
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MODULE_AUTHOR("Vladimir Barinov");
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MODULE_DESCRIPTION("TI DAVINCI EVM ASoC driver");
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MODULE_LICENSE("GPL");
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