355 lines
8.5 KiB
C
355 lines
8.5 KiB
C
/*
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* raumfeld_audio.c -- SoC audio for Raumfeld audio devices
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*
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* Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
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*
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* based on code from:
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*
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* Wolfson Microelectronics PLC.
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* Openedhand Ltd.
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* Liam Girdwood <lrg@slimlogic.co.uk>
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* Richard Purdie <richard@openedhand.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/module.h>
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#include <linux/i2c.h>
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#include <linux/delay.h>
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#include <linux/gpio.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/mach-types.h>
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#include "../codecs/cs4270.h"
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#include "../codecs/ak4104.h"
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#include "pxa2xx-pcm.h"
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#include "pxa-ssp.h"
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#define GPIO_SPDIF_RESET (38)
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#define GPIO_MCLK_RESET (111)
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#define GPIO_CODEC_RESET (120)
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static struct i2c_client *max9486_client;
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static struct i2c_board_info max9486_hwmon_info = {
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I2C_BOARD_INFO("max9485", 0x63),
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};
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#define MAX9485_MCLK_FREQ_112896 0x22
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#define MAX9485_MCLK_FREQ_122880 0x23
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#define MAX9485_MCLK_FREQ_225792 0x32
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#define MAX9485_MCLK_FREQ_245760 0x33
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static void set_max9485_clk(char clk)
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{
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i2c_master_send(max9486_client, &clk, 1);
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}
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static void raumfeld_enable_audio(bool en)
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{
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if (en) {
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gpio_set_value(GPIO_MCLK_RESET, 1);
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/* wait some time to let the clocks become stable */
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msleep(100);
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gpio_set_value(GPIO_SPDIF_RESET, 1);
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gpio_set_value(GPIO_CODEC_RESET, 1);
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} else {
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gpio_set_value(GPIO_MCLK_RESET, 0);
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gpio_set_value(GPIO_SPDIF_RESET, 0);
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gpio_set_value(GPIO_CODEC_RESET, 0);
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}
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}
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/* CS4270 */
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static int raumfeld_cs4270_startup(struct snd_pcm_substream *substream)
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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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/* set freq to 0 to enable all possible codec sample rates */
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return snd_soc_dai_set_sysclk(codec_dai, 0, 0, 0);
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}
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static void raumfeld_cs4270_shutdown(struct snd_pcm_substream *substream)
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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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/* set freq to 0 to enable all possible codec sample rates */
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snd_soc_dai_set_sysclk(codec_dai, 0, 0, 0);
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}
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static int raumfeld_cs4270_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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unsigned int fmt, clk = 0;
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int ret = 0;
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switch (params_rate(params)) {
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case 44100:
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set_max9485_clk(MAX9485_MCLK_FREQ_112896);
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clk = 11289600;
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break;
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case 48000:
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set_max9485_clk(MAX9485_MCLK_FREQ_122880);
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clk = 12288000;
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break;
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case 88200:
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set_max9485_clk(MAX9485_MCLK_FREQ_225792);
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clk = 22579200;
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break;
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case 96000:
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set_max9485_clk(MAX9485_MCLK_FREQ_245760);
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clk = 24576000;
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break;
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default:
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return -EINVAL;
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}
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fmt = SND_SOC_DAIFMT_I2S |
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SND_SOC_DAIFMT_NB_NF |
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SND_SOC_DAIFMT_CBS_CFS;
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/* setup the CODEC DAI */
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ret = snd_soc_dai_set_fmt(codec_dai, fmt);
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if (ret < 0)
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return ret;
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ret = snd_soc_dai_set_sysclk(codec_dai, 0, clk, 0);
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if (ret < 0)
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return ret;
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/* setup the CPU DAI */
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ret = snd_soc_dai_set_pll(cpu_dai, 0, 0, 0, clk);
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if (ret < 0)
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return ret;
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ret = snd_soc_dai_set_fmt(cpu_dai, fmt);
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if (ret < 0)
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return ret;
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ret = snd_soc_dai_set_clkdiv(cpu_dai, PXA_SSP_DIV_SCR, 4);
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if (ret < 0)
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return ret;
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ret = snd_soc_dai_set_sysclk(cpu_dai, PXA_SSP_CLK_EXT, clk, 1);
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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 raumfeld_cs4270_ops = {
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.startup = raumfeld_cs4270_startup,
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.shutdown = raumfeld_cs4270_shutdown,
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.hw_params = raumfeld_cs4270_hw_params,
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};
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static int raumfeld_line_suspend(struct platform_device *pdev, pm_message_t state)
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{
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raumfeld_enable_audio(false);
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return 0;
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}
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static int raumfeld_line_resume(struct platform_device *pdev)
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{
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raumfeld_enable_audio(true);
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return 0;
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}
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static struct snd_soc_dai_link raumfeld_line_dai = {
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.name = "CS4270",
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.stream_name = "CS4270",
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.cpu_dai = &pxa_ssp_dai[PXA_DAI_SSP1],
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.codec_dai = &cs4270_dai,
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.ops = &raumfeld_cs4270_ops,
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};
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static struct snd_soc_card snd_soc_line_raumfeld = {
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.name = "Raumfeld analog",
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.platform = &pxa2xx_soc_platform,
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.dai_link = &raumfeld_line_dai,
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.suspend_post = raumfeld_line_suspend,
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.resume_pre = raumfeld_line_resume,
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.num_links = 1,
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};
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/* AK4104 */
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static int raumfeld_ak4104_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 fmt, ret = 0, clk = 0;
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switch (params_rate(params)) {
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case 44100:
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set_max9485_clk(MAX9485_MCLK_FREQ_112896);
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clk = 11289600;
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break;
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case 48000:
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set_max9485_clk(MAX9485_MCLK_FREQ_122880);
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clk = 12288000;
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break;
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case 88200:
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set_max9485_clk(MAX9485_MCLK_FREQ_225792);
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clk = 22579200;
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break;
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case 96000:
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set_max9485_clk(MAX9485_MCLK_FREQ_245760);
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clk = 24576000;
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break;
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default:
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return -EINVAL;
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}
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fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF;
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/* setup the CODEC DAI */
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ret = snd_soc_dai_set_fmt(codec_dai, fmt | SND_SOC_DAIFMT_CBS_CFS);
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if (ret < 0)
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return ret;
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/* setup the CPU DAI */
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ret = snd_soc_dai_set_pll(cpu_dai, 0, 0, 0, clk);
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if (ret < 0)
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return ret;
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ret = snd_soc_dai_set_fmt(cpu_dai, fmt | SND_SOC_DAIFMT_CBS_CFS);
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if (ret < 0)
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return ret;
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ret = snd_soc_dai_set_clkdiv(cpu_dai, PXA_SSP_DIV_SCR, 4);
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if (ret < 0)
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return ret;
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ret = snd_soc_dai_set_sysclk(cpu_dai, PXA_SSP_CLK_EXT, clk, 1);
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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 raumfeld_ak4104_ops = {
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.hw_params = raumfeld_ak4104_hw_params,
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};
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static struct snd_soc_dai_link raumfeld_spdif_dai = {
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.name = "ak4104",
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.stream_name = "Playback",
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.cpu_dai = &pxa_ssp_dai[PXA_DAI_SSP2],
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.codec_dai = &ak4104_dai,
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.ops = &raumfeld_ak4104_ops,
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};
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static struct snd_soc_card snd_soc_spdif_raumfeld = {
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.name = "Raumfeld S/PDIF",
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.platform = &pxa2xx_soc_platform,
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.dai_link = &raumfeld_spdif_dai,
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.num_links = 1
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};
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/* raumfeld_audio audio subsystem */
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static struct snd_soc_device raumfeld_line_devdata = {
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.card = &snd_soc_line_raumfeld,
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.codec_dev = &soc_codec_device_cs4270,
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};
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static struct snd_soc_device raumfeld_spdif_devdata = {
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.card = &snd_soc_spdif_raumfeld,
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.codec_dev = &soc_codec_device_ak4104,
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};
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static struct platform_device *raumfeld_audio_line_device;
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static struct platform_device *raumfeld_audio_spdif_device;
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static int __init raumfeld_audio_init(void)
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{
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int ret;
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if (!machine_is_raumfeld_speaker() &&
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!machine_is_raumfeld_connector())
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return 0;
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max9486_client = i2c_new_device(i2c_get_adapter(0),
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&max9486_hwmon_info);
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if (!max9486_client)
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return -ENOMEM;
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set_max9485_clk(MAX9485_MCLK_FREQ_122880);
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/* LINE */
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raumfeld_audio_line_device = platform_device_alloc("soc-audio", 0);
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if (!raumfeld_audio_line_device)
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return -ENOMEM;
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platform_set_drvdata(raumfeld_audio_line_device,
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&raumfeld_line_devdata);
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raumfeld_line_devdata.dev = &raumfeld_audio_line_device->dev;
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ret = platform_device_add(raumfeld_audio_line_device);
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if (ret)
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platform_device_put(raumfeld_audio_line_device);
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/* no S/PDIF on Speakers */
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if (machine_is_raumfeld_speaker())
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return ret;
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/* S/PDIF */
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raumfeld_audio_spdif_device = platform_device_alloc("soc-audio", 1);
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if (!raumfeld_audio_spdif_device) {
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platform_device_put(raumfeld_audio_line_device);
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return -ENOMEM;
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}
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platform_set_drvdata(raumfeld_audio_spdif_device,
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&raumfeld_spdif_devdata);
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raumfeld_spdif_devdata.dev = &raumfeld_audio_spdif_device->dev;
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ret = platform_device_add(raumfeld_audio_spdif_device);
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if (ret) {
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platform_device_put(raumfeld_audio_line_device);
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platform_device_put(raumfeld_audio_spdif_device);
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}
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raumfeld_enable_audio(true);
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return ret;
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}
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static void __exit raumfeld_audio_exit(void)
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{
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raumfeld_enable_audio(false);
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platform_device_unregister(raumfeld_audio_line_device);
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if (machine_is_raumfeld_connector())
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platform_device_unregister(raumfeld_audio_spdif_device);
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i2c_unregister_device(max9486_client);
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gpio_free(GPIO_MCLK_RESET);
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gpio_free(GPIO_CODEC_RESET);
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gpio_free(GPIO_SPDIF_RESET);
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}
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module_init(raumfeld_audio_init);
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module_exit(raumfeld_audio_exit);
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/* Module information */
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MODULE_AUTHOR("Daniel Mack <daniel@caiaq.de>");
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MODULE_DESCRIPTION("Raumfeld audio SoC");
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MODULE_LICENSE("GPL");
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