ASoC: Support WM8580 based audio subsystem on SMDK64xx machines

New machine driver for WM8580 I2S i/f on SMDK64XX.
By default SoC-Slave is set and WM8580 is configured to use it's
PLLA to generate clocks from a 12MHz crystal attached to WM8580.

[Added dependency on BROKEN since the IISv4 interface hasn't been merged
yet, fixed the PLL API usage and removed the disabling of the PLL in the
hw_free function since that'll break simultaneous playback and record
 -- broonie.]

Signed-off-by: Jassi <jassi.brar@samsung.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 273 insertions, 0 deletions

diff --git a/sound/soc/s3c24xx/smdk64xx_wm8580.c b/sound/soc/s3c24xx/smdk64xx_wm8580.c
new file mode 100644
index 000000000000..482aaf10eff6
--- /dev/null
+++ b/sound/soc/s3c24xx/smdk64xx_wm8580.c
@@ -0,0 +1,273 @@
+/*
+ *  smdk64xx_wm8580.c
+ *
+ *  Copyright (c) 2009 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 as published by the
+ *  Free Software Foundation;  either version 2 of the  License, or (at your
+ *  option) any later version.
+ */
+
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+
+#include "../codecs/wm8580.h"
+#include "s3c24xx-pcm.h"
+#include "s3c64xx-i2s.h"
+
+#define S3C64XX_I2S_V4 2
+
+/* SMDK64XX has a 12MHZ crystal attached to WM8580 */
+#define SMDK64XX_WM8580_FREQ 12000000
+
+static int smdk64xx_hw_params(struct snd_pcm_substream *substream,
+        struct snd_pcm_hw_params *params)
+{
+        struct snd_soc_pcm_runtime *rtd = substream->private_data;
+        struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
+        struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
+        unsigned int pll_out;
+        int bfs, rfs, ret;
+
+        switch (params_format(params)) {
+        case SNDRV_PCM_FORMAT_U8:
+        case SNDRV_PCM_FORMAT_S8:
+                bfs = 16;
+                break;
+        case SNDRV_PCM_FORMAT_U16_LE:
+        case SNDRV_PCM_FORMAT_S16_LE:
+                bfs = 32;
+                break;
+        default:
+                return -EINVAL;
+        }
+
+        /* The Fvco for WM8580 PLLs must fall within [90,100]MHz.
+         * This criterion can't be met if we request PLL output
+         * as {8000x256, 64000x256, 11025x256}Hz.
+         * As a wayout, we rather change rfs to a minimum value that
+         * results in (params_rate(params) * rfs), and itself, acceptable
+         * to both - the CODEC and the CPU.
+         */
+        switch (params_rate(params)) {
+        case 16000:
+        case 22050:
+        case 32000:
+        case 44100:
+        case 48000:
+        case 88200:
+        case 96000:
+                rfs = 256;
+                break;
+        case 64000:
+                rfs = 384;
+                break;
+        case 8000:
+        case 11025:
+                rfs = 512;
+                break;
+        default:
+                return -EINVAL;
+        }
+        pll_out = params_rate(params) * rfs;
+
+        /* Set the Codec DAI configuration */
+        ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S
+                                         | SND_SOC_DAIFMT_NB_NF
+                                         | SND_SOC_DAIFMT_CBM_CFM);
+        if (ret < 0)
+                return ret;
+
+        /* Set the AP DAI configuration */
+        ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S
+                                         | SND_SOC_DAIFMT_NB_NF
+                                         | SND_SOC_DAIFMT_CBM_CFM);
+        if (ret < 0)
+                return ret;
+
+        ret = snd_soc_dai_set_sysclk(cpu_dai, S3C64XX_CLKSRC_CDCLK,
+                                        0, SND_SOC_CLOCK_IN);
+        if (ret < 0)
+                return ret;
+
+        /* We use PCLK for basic ops in SoC-Slave mode */
+        ret = snd_soc_dai_set_sysclk(cpu_dai, S3C64XX_CLKSRC_PCLK,
+                                        0, SND_SOC_CLOCK_IN);
+        if (ret < 0)
+                return ret;
+
+        /* Set WM8580 to drive MCLK from it's PLLA */
+        ret = snd_soc_dai_set_clkdiv(codec_dai, WM8580_MCLK,
+                                        WM8580_CLKSRC_PLLA);
+        if (ret < 0)
+                return ret;
+
+        /* Explicitly set WM8580-DAC to source from MCLK */
+        ret = snd_soc_dai_set_clkdiv(codec_dai, WM8580_DAC_CLKSEL,
+                                        WM8580_CLKSRC_MCLK);
+        if (ret < 0)
+                return ret;
+
+        /* Assuming the CODEC driver evaluates it's rfs too from this call */
+        ret = snd_soc_dai_set_pll(codec_dai, 0, WM8580_PLLA,
+                                        SMDK64XX_WM8580_FREQ, pll_out);
+        if (ret < 0)
+                return ret;
+
+        ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C_I2SV2_DIV_BCLK, bfs);
+        if (ret < 0)
+                return ret;
+
+        ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C_I2SV2_DIV_RCLK, rfs);
+        if (ret < 0)
+                return ret;
+
+        return 0;
+}
+
+/*
+ * SMDK64XX WM8580 DAI operations.
+ */
+static struct snd_soc_ops smdk64xx_ops = {
+        .hw_params = smdk64xx_hw_params,
+};
+
+/* SMDK64xx Playback widgets */
+static const struct snd_soc_dapm_widget wm8580_dapm_widgets_pbk[] = {
+        SND_SOC_DAPM_HP("Front-L/R", NULL),
+        SND_SOC_DAPM_HP("Center/Sub", NULL),
+        SND_SOC_DAPM_HP("Rear-L/R", NULL),
+};
+
+/* SMDK64xx Capture widgets */
+static const struct snd_soc_dapm_widget wm8580_dapm_widgets_cpt[] = {
+        SND_SOC_DAPM_MIC("MicIn", NULL),
+        SND_SOC_DAPM_LINE("LineIn", NULL),
+};
+
+/* SMDK-PAIFTX connections */
+static const struct snd_soc_dapm_route audio_map_tx[] = {
+        /* MicIn feeds AINL */
+        {"AINL", NULL, "MicIn"},
+
+        /* LineIn feeds AINL/R */
+        {"AINL", NULL, "LineIn"},
+        {"AINR", NULL, "LineIn"},
+};
+
+/* SMDK-PAIFRX connections */
+static const struct snd_soc_dapm_route audio_map_rx[] = {
+        /* Front Left/Right are fed VOUT1L/R */
+        {"Front-L/R", NULL, "VOUT1L"},
+        {"Front-L/R", NULL, "VOUT1R"},
+
+        /* Center/Sub are fed VOUT2L/R */
+        {"Center/Sub", NULL, "VOUT2L"},
+        {"Center/Sub", NULL, "VOUT2R"},
+
+        /* Rear Left/Right are fed VOUT3L/R */
+        {"Rear-L/R", NULL, "VOUT3L"},
+        {"Rear-L/R", NULL, "VOUT3R"},
+};
+
+static int smdk64xx_wm8580_init_paiftx(struct snd_soc_codec *codec)
+{
+        /* Add smdk64xx specific Capture widgets */
+        snd_soc_dapm_new_controls(codec, wm8580_dapm_widgets_cpt,
+                                  ARRAY_SIZE(wm8580_dapm_widgets_cpt));
+
+        /* Set up PAIFTX audio path */
+        snd_soc_dapm_add_routes(codec, audio_map_tx, ARRAY_SIZE(audio_map_tx));
+
+        /* All enabled by default */
+        snd_soc_dapm_enable_pin(codec, "MicIn");
+        snd_soc_dapm_enable_pin(codec, "LineIn");
+
+        /* signal a DAPM event */
+        snd_soc_dapm_sync(codec);
+
+        return 0;
+}
+
+static int smdk64xx_wm8580_init_paifrx(struct snd_soc_codec *codec)
+{
+        /* Add smdk64xx specific Playback widgets */
+        snd_soc_dapm_new_controls(codec, wm8580_dapm_widgets_pbk,
+                                  ARRAY_SIZE(wm8580_dapm_widgets_pbk));
+
+        /* Set up PAIFRX audio path */
+        snd_soc_dapm_add_routes(codec, audio_map_rx, ARRAY_SIZE(audio_map_rx));
+
+        /* All enabled by default */
+        snd_soc_dapm_enable_pin(codec, "Front-L/R");
+        snd_soc_dapm_enable_pin(codec, "Center/Sub");
+        snd_soc_dapm_enable_pin(codec, "Rear-L/R");
+
+        /* signal a DAPM event */
+        snd_soc_dapm_sync(codec);
+
+        return 0;
+}
+
+static struct snd_soc_dai_link smdk64xx_dai[] = {
+{ /* Primary Playback i/f */
+        .name = "WM8580 PAIF RX",
+        .stream_name = "Playback",
+        .cpu_dai = &s3c64xx_i2s_dai[S3C64XX_I2S_V4],
+        .codec_dai = &wm8580_dai[WM8580_DAI_PAIFRX],
+        .init = smdk64xx_wm8580_init_paifrx,
+        .ops = &smdk64xx_ops,
+},
+{ /* Primary Capture i/f */
+        .name = "WM8580 PAIF TX",
+        .stream_name = "Capture",
+        .cpu_dai = &s3c64xx_i2s_dai[S3C64XX_I2S_V4],
+        .codec_dai = &wm8580_dai[WM8580_DAI_PAIFTX],
+        .init = smdk64xx_wm8580_init_paiftx,
+        .ops = &smdk64xx_ops,
+},
+};
+
+static struct snd_soc_card smdk64xx = {
+        .name = "smdk64xx",
+        .platform = &s3c24xx_soc_platform,
+        .dai_link = smdk64xx_dai,
+        .num_links = ARRAY_SIZE(smdk64xx_dai),
+};
+
+static struct snd_soc_device smdk64xx_snd_devdata = {
+        .card = &smdk64xx,
+        .codec_dev = &soc_codec_dev_wm8580,
+};
+
+static struct platform_device *smdk64xx_snd_device;
+
+static int __init smdk64xx_audio_init(void)
+{
+        int ret;
+
+        smdk64xx_snd_device = platform_device_alloc("soc-audio", -1);
+        if (!smdk64xx_snd_device)
+                return -ENOMEM;
+
+        platform_set_drvdata(smdk64xx_snd_device, &smdk64xx_snd_devdata);
+        smdk64xx_snd_devdata.dev = &smdk64xx_snd_device->dev;
+        ret = platform_device_add(smdk64xx_snd_device);
+
+        if (ret)
+                platform_device_put(smdk64xx_snd_device);
+
+        return ret;
+}
+module_init(smdk64xx_audio_init);
+
+MODULE_AUTHOR("Jaswinder Singh, jassi.brar@samsung.com");
+MODULE_DESCRIPTION("ALSA SoC SMDK64XX WM8580");
+MODULE_LICENSE("GPL");