272 lines
6.4 KiB
C
272 lines
6.4 KiB
C
/* sound/soc/s3c24xx/s3c64xx-i2s.c
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*
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* ALSA SoC Audio Layer - S3C64XX I2S driver
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*
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* Copyright 2008 Openmoko, Inc.
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* Copyright 2008 Simtec Electronics
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* Ben Dooks <ben@simtec.co.uk>
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* http://armlinux.simtec.co.uk/
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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/init.h>
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/delay.h>
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#include <linux/clk.h>
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#include <linux/kernel.h>
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#include <linux/gpio.h>
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#include <linux/io.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/initval.h>
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#include <sound/soc.h>
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#include <plat/regs-s3c2412-iis.h>
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#include <plat/gpio-bank-d.h>
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#include <plat/gpio-bank-e.h>
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#include <plat/gpio-cfg.h>
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#include <plat/audio.h>
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#include <mach/map.h>
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#include <mach/dma.h>
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#include "s3c24xx-pcm.h"
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#include "s3c64xx-i2s.h"
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static struct s3c2410_dma_client s3c64xx_dma_client_out = {
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.name = "I2S PCM Stereo out"
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};
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static struct s3c2410_dma_client s3c64xx_dma_client_in = {
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.name = "I2S PCM Stereo in"
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};
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static struct s3c24xx_pcm_dma_params s3c64xx_i2s_pcm_stereo_out[2] = {
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[0] = {
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.channel = DMACH_I2S0_OUT,
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.client = &s3c64xx_dma_client_out,
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.dma_addr = S3C64XX_PA_IIS0 + S3C2412_IISTXD,
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.dma_size = 4,
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},
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[1] = {
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.channel = DMACH_I2S1_OUT,
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.client = &s3c64xx_dma_client_out,
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.dma_addr = S3C64XX_PA_IIS1 + S3C2412_IISTXD,
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.dma_size = 4,
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},
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};
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static struct s3c24xx_pcm_dma_params s3c64xx_i2s_pcm_stereo_in[2] = {
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[0] = {
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.channel = DMACH_I2S0_IN,
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.client = &s3c64xx_dma_client_in,
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.dma_addr = S3C64XX_PA_IIS0 + S3C2412_IISRXD,
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.dma_size = 4,
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},
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[1] = {
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.channel = DMACH_I2S1_IN,
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.client = &s3c64xx_dma_client_in,
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.dma_addr = S3C64XX_PA_IIS1 + S3C2412_IISRXD,
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.dma_size = 4,
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},
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};
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static struct s3c_i2sv2_info s3c64xx_i2s[2];
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static inline struct s3c_i2sv2_info *to_info(struct snd_soc_dai *cpu_dai)
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{
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return cpu_dai->private_data;
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}
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static int s3c64xx_i2s_set_sysclk(struct snd_soc_dai *cpu_dai,
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int clk_id, unsigned int freq, int dir)
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{
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struct s3c_i2sv2_info *i2s = to_info(cpu_dai);
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u32 iismod = readl(i2s->regs + S3C2412_IISMOD);
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switch (clk_id) {
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case S3C64XX_CLKSRC_PCLK:
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iismod &= ~S3C64XX_IISMOD_IMS_SYSMUX;
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break;
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case S3C64XX_CLKSRC_MUX:
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iismod |= S3C64XX_IISMOD_IMS_SYSMUX;
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break;
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default:
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return -EINVAL;
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}
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writel(iismod, i2s->regs + S3C2412_IISMOD);
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return 0;
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}
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unsigned long s3c64xx_i2s_get_clockrate(struct snd_soc_dai *dai)
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{
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struct s3c_i2sv2_info *i2s = to_info(dai);
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return clk_get_rate(i2s->iis_cclk);
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}
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EXPORT_SYMBOL_GPL(s3c64xx_i2s_get_clockrate);
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static int s3c64xx_i2s_probe(struct platform_device *pdev,
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struct snd_soc_dai *dai)
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{
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/* configure GPIO for i2s port */
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switch (dai->id) {
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case 0:
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s3c_gpio_cfgpin(S3C64XX_GPD(0), S3C64XX_GPD0_I2S0_CLK);
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s3c_gpio_cfgpin(S3C64XX_GPD(1), S3C64XX_GPD1_I2S0_CDCLK);
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s3c_gpio_cfgpin(S3C64XX_GPD(2), S3C64XX_GPD2_I2S0_LRCLK);
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s3c_gpio_cfgpin(S3C64XX_GPD(3), S3C64XX_GPD3_I2S0_DI);
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s3c_gpio_cfgpin(S3C64XX_GPD(4), S3C64XX_GPD4_I2S0_D0);
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break;
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case 1:
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s3c_gpio_cfgpin(S3C64XX_GPE(0), S3C64XX_GPE0_I2S1_CLK);
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s3c_gpio_cfgpin(S3C64XX_GPE(1), S3C64XX_GPE1_I2S1_CDCLK);
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s3c_gpio_cfgpin(S3C64XX_GPE(2), S3C64XX_GPE2_I2S1_LRCLK);
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s3c_gpio_cfgpin(S3C64XX_GPE(3), S3C64XX_GPE3_I2S1_DI);
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s3c_gpio_cfgpin(S3C64XX_GPE(4), S3C64XX_GPE4_I2S1_D0);
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}
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return 0;
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}
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#define S3C64XX_I2S_RATES \
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(SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_16000 | \
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SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
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SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
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#define S3C64XX_I2S_FMTS \
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(SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE)
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static struct snd_soc_dai_ops s3c64xx_i2s_dai_ops = {
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.set_sysclk = s3c64xx_i2s_set_sysclk,
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};
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struct snd_soc_dai s3c64xx_i2s_dai[] = {
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{
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.name = "s3c64xx-i2s",
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.id = 0,
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.probe = s3c64xx_i2s_probe,
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.playback = {
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.channels_min = 2,
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.channels_max = 2,
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.rates = S3C64XX_I2S_RATES,
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.formats = S3C64XX_I2S_FMTS,
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},
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.capture = {
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.channels_min = 2,
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.channels_max = 2,
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.rates = S3C64XX_I2S_RATES,
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.formats = S3C64XX_I2S_FMTS,
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},
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.ops = &s3c64xx_i2s_dai_ops,
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.symmetric_rates = 1,
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},
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{
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.name = "s3c64xx-i2s",
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.id = 1,
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.probe = s3c64xx_i2s_probe,
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.playback = {
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.channels_min = 2,
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.channels_max = 2,
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.rates = S3C64XX_I2S_RATES,
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.formats = S3C64XX_I2S_FMTS,
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},
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.capture = {
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.channels_min = 2,
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.channels_max = 2,
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.rates = S3C64XX_I2S_RATES,
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.formats = S3C64XX_I2S_FMTS,
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},
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.ops = &s3c64xx_i2s_dai_ops,
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.symmetric_rates = 1,
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},
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};
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EXPORT_SYMBOL_GPL(s3c64xx_i2s_dai);
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static __devinit int s3c64xx_iis_dev_probe(struct platform_device *pdev)
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{
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struct s3c_i2sv2_info *i2s;
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struct snd_soc_dai *dai;
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int ret;
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if (pdev->id >= ARRAY_SIZE(s3c64xx_i2s)) {
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dev_err(&pdev->dev, "id %d out of range\n", pdev->id);
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return -EINVAL;
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}
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i2s = &s3c64xx_i2s[pdev->id];
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dai = &s3c64xx_i2s_dai[pdev->id];
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dai->dev = &pdev->dev;
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i2s->dma_capture = &s3c64xx_i2s_pcm_stereo_in[pdev->id];
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i2s->dma_playback = &s3c64xx_i2s_pcm_stereo_out[pdev->id];
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i2s->iis_cclk = clk_get(&pdev->dev, "audio-bus");
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if (IS_ERR(i2s->iis_cclk)) {
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dev_err(&pdev->dev, "failed to get audio-bus\n");
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ret = PTR_ERR(i2s->iis_cclk);
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goto err;
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}
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ret = s3c_i2sv2_probe(pdev, dai, i2s,
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dai->id ? S3C64XX_PA_IIS1 : S3C64XX_PA_IIS0);
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if (ret)
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goto err_clk;
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ret = s3c_i2sv2_register_dai(dai);
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if (ret != 0)
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goto err_i2sv2;
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return 0;
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err_i2sv2:
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/* Not implemented for I2Sv2 core yet */
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err_clk:
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clk_put(i2s->iis_cclk);
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err:
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return ret;
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}
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static __devexit int s3c64xx_iis_dev_remove(struct platform_device *pdev)
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{
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dev_err(&pdev->dev, "Device removal not yet supported\n");
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return 0;
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}
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static struct platform_driver s3c64xx_iis_driver = {
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.probe = s3c64xx_iis_dev_probe,
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.remove = s3c64xx_iis_dev_remove,
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.driver = {
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.name = "s3c64xx-iis",
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.owner = THIS_MODULE,
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},
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};
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static int __init s3c64xx_i2s_init(void)
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{
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return platform_driver_register(&s3c64xx_iis_driver);
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}
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module_init(s3c64xx_i2s_init);
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static void __exit s3c64xx_i2s_exit(void)
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{
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platform_driver_unregister(&s3c64xx_iis_driver);
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}
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module_exit(s3c64xx_i2s_exit);
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/* Module information */
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MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
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MODULE_DESCRIPTION("S3C64XX I2S SoC Interface");
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MODULE_LICENSE("GPL");
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