--- /dev/null
+/* sound/soc/s3c24xx/s3c64xx-i2s-v4.c
+ *
+ * ALSA SoC Audio Layer - S3C64XX I2Sv4 driver
+ * Copyright (c) 2010 Samsung Electronics Co. Ltd
+ * Author: Jaswinder Singh <jassi.brar@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/clk.h>
+#include <linux/gpio.h>
+#include <linux/io.h>
+
+#include <sound/soc.h>
+#include <sound/pcm_params.h>
+
+#include <mach/gpio-bank-c.h>
+#include <mach/gpio-bank-h.h>
+#include <plat/gpio-cfg.h>
+
+#include <mach/map.h>
+#include <mach/dma.h>
+
+#include "s3c-dma.h"
+#include "regs-i2s-v2.h"
+#include "s3c64xx-i2s.h"
+
+static struct s3c2410_dma_client s3c64xx_dma_client_out = {
+ .name = "I2Sv4 PCM Stereo out"
+};
+
+static struct s3c2410_dma_client s3c64xx_dma_client_in = {
+ .name = "I2Sv4 PCM Stereo in"
+};
+
+static struct s3c_dma_params s3c64xx_i2sv4_pcm_stereo_out;
+static struct s3c_dma_params s3c64xx_i2sv4_pcm_stereo_in;
+static struct s3c_i2sv2_info s3c64xx_i2sv4;
+
+struct snd_soc_dai s3c64xx_i2s_v4_dai;
+EXPORT_SYMBOL_GPL(s3c64xx_i2s_v4_dai);
+
+static inline struct s3c_i2sv2_info *to_info(struct snd_soc_dai *cpu_dai)
+{
+ return cpu_dai->private_data;
+}
+
+static int s3c64xx_i2sv4_probe(struct platform_device *pdev,
+ struct snd_soc_dai *dai)
+{
+ /* configure GPIO for i2s port */
+ s3c_gpio_cfgpin(S3C64XX_GPC(4), S3C64XX_GPC4_I2S_V40_DO0);
+ s3c_gpio_cfgpin(S3C64XX_GPC(5), S3C64XX_GPC5_I2S_V40_DO1);
+ s3c_gpio_cfgpin(S3C64XX_GPC(7), S3C64XX_GPC7_I2S_V40_DO2);
+ s3c_gpio_cfgpin(S3C64XX_GPH(6), S3C64XX_GPH6_I2S_V40_BCLK);
+ s3c_gpio_cfgpin(S3C64XX_GPH(7), S3C64XX_GPH7_I2S_V40_CDCLK);
+ s3c_gpio_cfgpin(S3C64XX_GPH(8), S3C64XX_GPH8_I2S_V40_LRCLK);
+ s3c_gpio_cfgpin(S3C64XX_GPH(9), S3C64XX_GPH9_I2S_V40_DI);
+
+ return 0;
+}
+
+static int s3c_i2sv4_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *cpu_dai)
+{
+ struct s3c_i2sv2_info *i2s = to_info(cpu_dai);
+ struct s3c_dma_params *dma_data;
+ u32 iismod;
+
+ dev_dbg(cpu_dai->dev, "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);
+ dev_dbg(cpu_dai->dev, "%s: r: IISMOD: %x\n", __func__, iismod);
+
+ iismod &= ~S3C64XX_IISMOD_BLC_MASK;
+ switch (params_format(params)) {
+ case SNDRV_PCM_FORMAT_S8:
+ iismod |= S3C64XX_IISMOD_BLC_8BIT;
+ break;
+ case SNDRV_PCM_FORMAT_S16_LE:
+ break;
+ case SNDRV_PCM_FORMAT_S24_LE:
+ iismod |= S3C64XX_IISMOD_BLC_24BIT;
+ break;
+ }
+
+ writel(iismod, i2s->regs + S3C2412_IISMOD);
+ dev_dbg(cpu_dai->dev, "%s: w: IISMOD: %x\n", __func__, iismod);
+
+ return 0;
+}
+
+static struct snd_soc_dai_ops s3c64xx_i2sv4_dai_ops = {
+ .hw_params = s3c_i2sv4_hw_params,
+};
+
+static __devinit int s3c64xx_i2sv4_dev_probe(struct platform_device *pdev)
+{
+ struct s3c_i2sv2_info *i2s;
+ struct snd_soc_dai *dai;
+ int ret;
+
+ i2s = &s3c64xx_i2sv4;
+ dai = &s3c64xx_i2s_v4_dai;
+
+ if (dai->dev) {
+ dev_dbg(dai->dev, "%s: \
+ I2Sv4 instance already registered!\n", __func__);
+ return -EBUSY;
+ }
+
+ dai->dev = &pdev->dev;
+ dai->name = "s3c64xx-i2s-v4";
+ dai->id = 0;
+ dai->symmetric_rates = 1;
+ dai->playback.channels_min = 2;
+ dai->playback.channels_max = 2;
+ dai->playback.rates = S3C64XX_I2S_RATES;
+ dai->playback.formats = S3C64XX_I2S_FMTS;
+ dai->capture.channels_min = 2;
+ dai->capture.channels_max = 2;
+ dai->capture.rates = S3C64XX_I2S_RATES;
+ dai->capture.formats = S3C64XX_I2S_FMTS;
+ dai->probe = s3c64xx_i2sv4_probe;
+ dai->ops = &s3c64xx_i2sv4_dai_ops;
+
+ i2s->feature |= S3C_FEATURE_CDCLKCON;
+
+ i2s->dma_capture = &s3c64xx_i2sv4_pcm_stereo_in;
+ i2s->dma_playback = &s3c64xx_i2sv4_pcm_stereo_out;
+
+ i2s->dma_capture->channel = DMACH_HSI_I2SV40_RX;
+ i2s->dma_capture->dma_addr = S3C64XX_PA_IISV4 + S3C2412_IISRXD;
+ i2s->dma_playback->channel = DMACH_HSI_I2SV40_TX;
+ i2s->dma_playback->dma_addr = S3C64XX_PA_IISV4 + S3C2412_IISTXD;
+
+ i2s->dma_capture->client = &s3c64xx_dma_client_in;
+ i2s->dma_capture->dma_size = 4;
+ i2s->dma_playback->client = &s3c64xx_dma_client_out;
+ i2s->dma_playback->dma_size = 4;
+
+ i2s->iis_cclk = clk_get(&pdev->dev, "audio-bus");
+ if (IS_ERR(i2s->iis_cclk)) {
+ dev_err(&pdev->dev, "failed to get audio-bus\n");
+ ret = PTR_ERR(i2s->iis_cclk);
+ goto err;
+ }
+
+ clk_enable(i2s->iis_cclk);
+
+ ret = s3c_i2sv2_probe(pdev, dai, i2s, 0);
+ if (ret)
+ goto err_clk;
+
+ ret = s3c_i2sv2_register_dai(dai);
+ if (ret != 0)
+ goto err_i2sv2;
+
+ return 0;
+
+err_i2sv2:
+ /* Not implemented for I2Sv2 core yet */
+err_clk:
+ clk_put(i2s->iis_cclk);
+err:
+ return ret;
+}
+
+static __devexit int s3c64xx_i2sv4_dev_remove(struct platform_device *pdev)
+{
+ dev_err(&pdev->dev, "Device removal not yet supported\n");
+ return 0;
+}
+
+static struct platform_driver s3c64xx_i2sv4_driver = {
+ .probe = s3c64xx_i2sv4_dev_probe,
+ .remove = s3c64xx_i2sv4_dev_remove,
+ .driver = {
+ .name = "s3c64xx-iis-v4",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init s3c64xx_i2sv4_init(void)
+{
+ return platform_driver_register(&s3c64xx_i2sv4_driver);
+}
+module_init(s3c64xx_i2sv4_init);
+
+static void __exit s3c64xx_i2sv4_exit(void)
+{
+ platform_driver_unregister(&s3c64xx_i2sv4_driver);
+}
+module_exit(s3c64xx_i2sv4_exit);
+
+/* Module information */
+MODULE_AUTHOR("Jaswinder Singh, <jassi.brar@samsung.com>");
+MODULE_DESCRIPTION("S3C64XX I2Sv4 SoC Interface");
+MODULE_LICENSE("GPL");
projects / linux-beck.git / commitdiff