faa31776e4
The s3c24xx_pcm prefix for the soc_platform is inappropriate when some Samsung SoCs have PCM controllers which will eventually have drivers and hence namespace ambiguities. To resolve naming ambiguities in future the following have been renamed in order 1) s3c24xx_pcm_dma_params -> s3c_dma_params 2) s3c24xx_pcm_preallocate_dma_buffer -> s3c_preallocate_dma_buffer 3) s3c24xx_pcm_dmamask -> s3c_dma_mask 4) s3c24xx_pcm_XXX -> s3c_dma_XXX Signed-off-by: Jassi Brar <jassi.brar@samsung.com> Acked-by: Ben Dooks <ben-linux@fluff.org> Acked-by: Liam Girdwood <lrg@slimlogic.co.uk> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
190 lines
4.7 KiB
C
190 lines
4.7 KiB
C
/* sound/soc/s3c24xx/s3c2412-i2s.c
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*
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* ALSA Soc Audio Layer - S3C2412 I2S driver
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*
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* Copyright (c) 2006 Wolfson Microelectronics PLC.
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* Graeme Gregory graeme.gregory@wolfsonmicro.com
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* linux@wolfsonmicro.com
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*
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* Copyright (c) 2007, 2004-2005 Simtec Electronics
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* http://armlinux.simtec.co.uk/
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* Ben Dooks <ben@simtec.co.uk>
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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/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/gpio.h>
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#include <linux/clk.h>
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#include <linux/kernel.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 <mach/hardware.h>
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#include <plat/regs-s3c2412-iis.h>
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#include <mach/regs-gpio.h>
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#include <mach/dma.h>
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#include "s3c24xx-pcm.h"
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#include "s3c2412-i2s.h"
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#define S3C2412_I2S_DEBUG 0
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static struct s3c2410_dma_client s3c2412_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 s3c2412_dma_client_in = {
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.name = "I2S PCM Stereo in"
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};
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static struct s3c_dma_params s3c2412_i2s_pcm_stereo_out = {
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.client = &s3c2412_dma_client_out,
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.channel = DMACH_I2S_OUT,
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.dma_addr = S3C2410_PA_IIS + S3C2412_IISTXD,
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.dma_size = 4,
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};
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static struct s3c_dma_params s3c2412_i2s_pcm_stereo_in = {
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.client = &s3c2412_dma_client_in,
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.channel = DMACH_I2S_IN,
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.dma_addr = S3C2410_PA_IIS + S3C2412_IISRXD,
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.dma_size = 4,
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};
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static struct s3c_i2sv2_info s3c2412_i2s;
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/*
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* Set S3C2412 Clock source
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*/
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static int s3c2412_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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u32 iismod = readl(s3c2412_i2s.regs + S3C2412_IISMOD);
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pr_debug("%s(%p, %d, %u, %d)\n", __func__, cpu_dai, clk_id,
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freq, dir);
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switch (clk_id) {
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case S3C2412_CLKSRC_PCLK:
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s3c2412_i2s.master = 1;
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iismod &= ~S3C2412_IISMOD_MASTER_MASK;
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iismod |= S3C2412_IISMOD_MASTER_INTERNAL;
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break;
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case S3C2412_CLKSRC_I2SCLK:
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s3c2412_i2s.master = 0;
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iismod &= ~S3C2412_IISMOD_MASTER_MASK;
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iismod |= S3C2412_IISMOD_MASTER_EXTERNAL;
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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, s3c2412_i2s.regs + S3C2412_IISMOD);
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return 0;
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}
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struct clk *s3c2412_get_iisclk(void)
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{
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return s3c2412_i2s.iis_clk;
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}
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EXPORT_SYMBOL_GPL(s3c2412_get_iisclk);
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static int s3c2412_i2s_probe(struct platform_device *pdev,
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struct snd_soc_dai *dai)
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{
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int ret;
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pr_debug("Entered %s\n", __func__);
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ret = s3c_i2sv2_probe(pdev, dai, &s3c2412_i2s, S3C2410_PA_IIS);
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if (ret)
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return ret;
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s3c2412_i2s.dma_capture = &s3c2412_i2s_pcm_stereo_in;
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s3c2412_i2s.dma_playback = &s3c2412_i2s_pcm_stereo_out;
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s3c2412_i2s.iis_cclk = clk_get(&pdev->dev, "i2sclk");
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if (s3c2412_i2s.iis_cclk == NULL) {
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pr_err("failed to get i2sclk clock\n");
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iounmap(s3c2412_i2s.regs);
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return -ENODEV;
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}
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/* Set MPLL as the source for IIS CLK */
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clk_set_parent(s3c2412_i2s.iis_cclk, clk_get(NULL, "mpll"));
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clk_enable(s3c2412_i2s.iis_cclk);
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s3c2412_i2s.iis_cclk = s3c2412_i2s.iis_pclk;
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/* Configure the I2S pins in correct mode */
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s3c2410_gpio_cfgpin(S3C2410_GPE0, S3C2410_GPE0_I2SLRCK);
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s3c2410_gpio_cfgpin(S3C2410_GPE1, S3C2410_GPE1_I2SSCLK);
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s3c2410_gpio_cfgpin(S3C2410_GPE2, S3C2410_GPE2_CDCLK);
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s3c2410_gpio_cfgpin(S3C2410_GPE3, S3C2410_GPE3_I2SSDI);
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s3c2410_gpio_cfgpin(S3C2410_GPE4, S3C2410_GPE4_I2SSDO);
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return 0;
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}
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#define S3C2412_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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static struct snd_soc_dai_ops s3c2412_i2s_dai_ops = {
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.set_sysclk = s3c2412_i2s_set_sysclk,
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};
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struct snd_soc_dai s3c2412_i2s_dai = {
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.name = "s3c2412-i2s",
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.id = 0,
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.probe = s3c2412_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 = S3C2412_I2S_RATES,
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.formats = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE,
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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 = S3C2412_I2S_RATES,
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.formats = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE,
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},
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.ops = &s3c2412_i2s_dai_ops,
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};
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EXPORT_SYMBOL_GPL(s3c2412_i2s_dai);
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static int __init s3c2412_i2s_init(void)
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{
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return s3c_i2sv2_register_dai(&s3c2412_i2s_dai);
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}
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module_init(s3c2412_i2s_init);
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static void __exit s3c2412_i2s_exit(void)
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{
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snd_soc_unregister_dai(&s3c2412_i2s_dai);
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}
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module_exit(s3c2412_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("S3C2412 I2S SoC Interface");
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MODULE_LICENSE("GPL");
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