1 files changed, 212 insertions, 0 deletions

diff --git a/sound/soc/samsung/s3c2412-i2s.c b/sound/soc/samsung/s3c2412-i2s.c
new file mode 100644
index 000000000000..7ea837867124
--- /dev/null
+++ b/sound/soc/samsung/s3c2412-i2s.c
@@ -0,0 +1,212 @@
+/* sound/soc/samsung/s3c2412-i2s.c
+ *
+ * ALSA Soc Audio Layer - S3C2412 I2S driver
+ *
+ * Copyright (c) 2006 Wolfson Microelectronics PLC.
+ *      Graeme Gregory graeme.gregory@wolfsonmicro.com
+ *      linux@wolfsonmicro.com
+ *
+ * Copyright (c) 2007, 2004-2005 Simtec Electronics
+ *      http://armlinux.simtec.co.uk/
+ *      Ben Dooks <ben@simtec.co.uk>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <linux/clk.h>
+#include <linux/kernel.h>
+#include <linux/io.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/initval.h>
+#include <sound/soc.h>
+#include <mach/hardware.h>
+
+#include <mach/regs-gpio.h>
+#include <mach/dma.h>
+
+#include "dma.h"
+#include "regs-i2s-v2.h"
+#include "s3c2412-i2s.h"
+
+#define S3C2412_I2S_DEBUG 0
+
+static struct s3c2410_dma_client s3c2412_dma_client_out = {
+        .name           = "I2S PCM Stereo out"
+};
+
+static struct s3c2410_dma_client s3c2412_dma_client_in = {
+        .name           = "I2S PCM Stereo in"
+};
+
+static struct s3c_dma_params s3c2412_i2s_pcm_stereo_out = {
+        .client         = &s3c2412_dma_client_out,
+        .channel        = DMACH_I2S_OUT,
+        .dma_addr       = S3C2410_PA_IIS + S3C2412_IISTXD,
+        .dma_size       = 4,
+};
+
+static struct s3c_dma_params s3c2412_i2s_pcm_stereo_in = {
+        .client         = &s3c2412_dma_client_in,
+        .channel        = DMACH_I2S_IN,
+        .dma_addr       = S3C2410_PA_IIS + S3C2412_IISRXD,
+        .dma_size       = 4,
+};
+
+static struct s3c_i2sv2_info s3c2412_i2s;
+
+static int s3c2412_i2s_probe(struct snd_soc_dai *dai)
+{
+        int ret;
+
+        pr_debug("Entered %s\n", __func__);
+
+        ret = s3c_i2sv2_probe(dai, &s3c2412_i2s, S3C2410_PA_IIS);
+        if (ret)
+                return ret;
+
+        s3c2412_i2s.dma_capture = &s3c2412_i2s_pcm_stereo_in;
+        s3c2412_i2s.dma_playback = &s3c2412_i2s_pcm_stereo_out;
+
+        s3c2412_i2s.iis_cclk = clk_get(dai->dev, "i2sclk");
+        if (s3c2412_i2s.iis_cclk == NULL) {
+                pr_err("failed to get i2sclk clock\n");
+                iounmap(s3c2412_i2s.regs);
+                return -ENODEV;
+        }
+
+        /* Set MPLL as the source for IIS CLK */
+
+        clk_set_parent(s3c2412_i2s.iis_cclk, clk_get(NULL, "mpll"));
+        clk_enable(s3c2412_i2s.iis_cclk);
+
+        s3c2412_i2s.iis_cclk = s3c2412_i2s.iis_pclk;
+
+        /* Configure the I2S pins in correct mode */
+        s3c2410_gpio_cfgpin(S3C2410_GPE0, S3C2410_GPE0_I2SLRCK);
+        s3c2410_gpio_cfgpin(S3C2410_GPE1, S3C2410_GPE1_I2SSCLK);
+        s3c2410_gpio_cfgpin(S3C2410_GPE2, S3C2410_GPE2_CDCLK);
+        s3c2410_gpio_cfgpin(S3C2410_GPE3, S3C2410_GPE3_I2SSDI);
+        s3c2410_gpio_cfgpin(S3C2410_GPE4, S3C2410_GPE4_I2SSDO);
+
+        return 0;
+}
+
+static int s3c2412_i2s_remove(struct snd_soc_dai *dai)
+{
+        clk_disable(s3c2412_i2s.iis_cclk);
+        clk_put(s3c2412_i2s.iis_cclk);
+        iounmap(s3c2412_i2s.regs);
+
+        return 0;
+}
+
+static int s3c2412_i2s_hw_params(struct snd_pcm_substream *substream,
+                                 struct snd_pcm_hw_params *params,
+                                 struct snd_soc_dai *cpu_dai)
+{
+        struct s3c_i2sv2_info *i2s = snd_soc_dai_get_drvdata(cpu_dai);
+        struct s3c_dma_params *dma_data;
+        u32 iismod;
+
+        pr_debug("Entered %s\n", __func__);
+
+        if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+                dma_data = i2s->dma_playback;
+        else
+                dma_data = i2s->dma_capture;
+
+        snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
+
+        iismod = readl(i2s->regs + S3C2412_IISMOD);
+        pr_debug("%s: r: IISMOD: %x\n", __func__, iismod);
+
+        switch (params_format(params)) {
+        case SNDRV_PCM_FORMAT_S8:
+                iismod |= S3C2412_IISMOD_8BIT;
+                break;
+        case SNDRV_PCM_FORMAT_S16_LE:
+                iismod &= ~S3C2412_IISMOD_8BIT;
+                break;
+        }
+
+        writel(iismod, i2s->regs + S3C2412_IISMOD);
+        pr_debug("%s: w: IISMOD: %x\n", __func__, iismod);
+
+        return 0;
+}
+
+#define S3C2412_I2S_RATES \
+        (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_16000 | \
+        SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
+        SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
+
+static struct snd_soc_dai_ops s3c2412_i2s_dai_ops = {
+        .hw_params      = s3c2412_i2s_hw_params,
+};
+
+static struct snd_soc_dai_driver s3c2412_i2s_dai = {
+        .probe          = s3c2412_i2s_probe,
+        .remove = s3c2412_i2s_remove,
+        .playback = {
+                .channels_min   = 2,
+                .channels_max   = 2,
+                .rates          = S3C2412_I2S_RATES,
+                .formats        = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE,
+        },
+        .capture = {
+                .channels_min   = 2,
+                .channels_max   = 2,
+                .rates          = S3C2412_I2S_RATES,
+                .formats        = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE,
+        },
+        .ops = &s3c2412_i2s_dai_ops,
+};
+
+static __devinit int s3c2412_iis_dev_probe(struct platform_device *pdev)
+{
+        return snd_soc_register_dai(&pdev->dev, &s3c2412_i2s_dai);
+}
+
+static __devexit int s3c2412_iis_dev_remove(struct platform_device *pdev)
+{
+        snd_soc_unregister_dai(&pdev->dev);
+        return 0;
+}
+
+static struct platform_driver s3c2412_iis_driver = {
+        .probe  = s3c2412_iis_dev_probe,
+        .remove = s3c2412_iis_dev_remove,
+        .driver = {
+                .name = "s3c2412-iis",
+                .owner = THIS_MODULE,
+        },
+};
+
+static int __init s3c2412_i2s_init(void)
+{
+        return platform_driver_register(&s3c2412_iis_driver);
+}
+module_init(s3c2412_i2s_init);
+
+static void __exit s3c2412_i2s_exit(void)
+{
+        platform_driver_unregister(&s3c2412_iis_driver);
+}
+module_exit(s3c2412_i2s_exit);
+
+/* Module information */
+MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
+MODULE_DESCRIPTION("S3C2412 I2S SoC Interface");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:s3c2412-iis");