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-/* 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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-
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-#include <linux/module.h>
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-#include <linux/clk.h>
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-#include <linux/gpio.h>
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-#include <linux/io.h>
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-#include <linux/slab.h>
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-
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-#include <sound/soc.h>
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-
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-#include <plat/audio.h>
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-
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-#include <mach/map.h>
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-#include <mach/dma.h>
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-
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-#include "dma.h"
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-#include "regs-i2s-v2.h"
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-#include "s3c64xx-i2s.h"
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-
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-/* The value should be set to maximum of the total number
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- * of I2Sv3 controllers that any supported SoC has.
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- */
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-#define MAX_I2SV3 2
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-
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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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-
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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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-
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-static struct s3c_dma_params s3c64xx_i2s_pcm_stereo_out[MAX_I2SV3];
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-static struct s3c_dma_params s3c64xx_i2s_pcm_stereo_in[MAX_I2SV3];
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-static struct s3c_i2sv2_info s3c64xx_i2s[MAX_I2SV3];
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-
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-struct clk *s3c64xx_i2s_get_clock(struct snd_soc_dai *dai)
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-{
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- struct s3c_i2sv2_info *i2s = snd_soc_dai_get_drvdata(dai);
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- u32 iismod = readl(i2s->regs + S3C2412_IISMOD);
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-
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- if (iismod & S3C2412_IISMOD_IMS_SYSMUX)
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- return i2s->iis_cclk;
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- else
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- return i2s->iis_pclk;
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-}
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-EXPORT_SYMBOL_GPL(s3c64xx_i2s_get_clock);
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-
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-static int s3c64xx_i2s_probe(struct snd_soc_dai *dai)
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-{
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- struct s3c_i2sv2_info *i2s;
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- int ret;
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-
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- if (dai->id >= MAX_I2SV3) {
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- dev_err(dai->dev, "id %d out of range\n", dai->id);
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- return -EINVAL;
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- }
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-
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- i2s = &s3c64xx_i2s[dai->id];
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- snd_soc_dai_set_drvdata(dai, i2s);
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-
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- i2s->iis_cclk = clk_get(dai->dev, "audio-bus");
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- if (IS_ERR(i2s->iis_cclk)) {
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- dev_err(dai->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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-
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- clk_enable(i2s->iis_cclk);
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-
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- ret = s3c_i2sv2_probe(dai, i2s, i2s->base);
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- if (ret)
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- goto err_clk;
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-
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- return 0;
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-
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-err_clk:
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- clk_disable(i2s->iis_cclk);
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- clk_put(i2s->iis_cclk);
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-err:
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- kfree(i2s);
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- return ret;
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-}
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-
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-static int s3c64xx_i2s_remove(struct snd_soc_dai *dai)
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-{
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- struct s3c_i2sv2_info *i2s = snd_soc_dai_get_drvdata(dai);
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-
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- clk_disable(i2s->iis_cclk);
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- clk_put(i2s->iis_cclk);
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- kfree(i2s);
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- return 0;
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-}
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-
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-static struct snd_soc_dai_ops s3c64xx_i2s_dai_ops;
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-
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-static struct snd_soc_dai_driver s3c64xx_i2s_dai[MAX_I2SV3] = {
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-{
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- .name = "s3c64xx-i2s-0",
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- .probe = s3c64xx_i2s_probe,
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- .remove = s3c64xx_i2s_remove,
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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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- .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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- .ops = &s3c64xx_i2s_dai_ops,
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- .symmetric_rates = 1,
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-}, {
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- .name = "s3c64xx-i2s-1",
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- .probe = s3c64xx_i2s_probe,
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- .remove = s3c64xx_i2s_remove,
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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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- .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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- .ops = &s3c64xx_i2s_dai_ops,
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- .symmetric_rates = 1,
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-},};
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-
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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_audio_pdata *i2s_pdata;
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- struct s3c_i2sv2_info *i2s;
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- struct resource *res;
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- int i, ret;
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-
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- if (pdev->id >= MAX_I2SV3) {
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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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-
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- i2s = &s3c64xx_i2s[pdev->id];
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-
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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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-
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- res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
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- if (!res) {
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- dev_err(&pdev->dev, "Unable to get I2S-TX dma resource\n");
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- return -ENXIO;
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- }
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- i2s->dma_playback->channel = res->start;
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-
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- res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
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- if (!res) {
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- dev_err(&pdev->dev, "Unable to get I2S-RX dma resource\n");
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- return -ENXIO;
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- }
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- i2s->dma_capture->channel = res->start;
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-
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- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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- if (!res) {
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- dev_err(&pdev->dev, "Unable to get I2S SFR address\n");
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- return -ENXIO;
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- }
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-
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- if (!request_mem_region(res->start, resource_size(res),
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- "s3c64xx-i2s")) {
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- dev_err(&pdev->dev, "Unable to request SFR region\n");
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- return -EBUSY;
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- }
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- i2s->base = res->start;
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-
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- i2s_pdata = pdev->dev.platform_data;
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- if (i2s_pdata && i2s_pdata->cfg_gpio && i2s_pdata->cfg_gpio(pdev)) {
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- dev_err(&pdev->dev, "Unable to configure gpio\n");
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- return -EINVAL;
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- }
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- i2s->dma_capture->dma_addr = res->start + S3C2412_IISRXD;
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- i2s->dma_playback->dma_addr = res->start + S3C2412_IISTXD;
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-
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- i2s->dma_capture->client = &s3c64xx_dma_client_in;
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- i2s->dma_capture->dma_size = 4;
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- i2s->dma_playback->client = &s3c64xx_dma_client_out;
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- i2s->dma_playback->dma_size = 4;
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-
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- for (i = 0; i < ARRAY_SIZE(s3c64xx_i2s_dai); i++) {
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- ret = s3c_i2sv2_register_dai(&pdev->dev, i,
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- &s3c64xx_i2s_dai[i]);
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- if (ret != 0)
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- return ret;
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- }
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-
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- return 0;
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-}
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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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- snd_soc_unregister_dais(&pdev->dev, ARRAY_SIZE(s3c64xx_i2s_dai));
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- return 0;
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-}
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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 = "samsung-i2s",
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- .owner = THIS_MODULE,
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- },
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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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-
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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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-
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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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-MODULE_ALIAS("platform:samsung-i2s");
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Jassi Brar