1 files changed, 498 insertions, 0 deletions

diff --git a/sound/soc/s3c24xx/neo1973_gta02_wm8753.c b/sound/soc/s3c24xx/neo1973_gta02_wm8753.c
new file mode 100644
index 000000000000..0c52e36ddd87
--- /dev/null
+++ b/sound/soc/s3c24xx/neo1973_gta02_wm8753.c
@@ -0,0 +1,498 @@
+/*
+ * neo1973_gta02_wm8753.c  --  SoC audio for Openmoko Freerunner(GTA02)
+ *
+ * Copyright 2007 Openmoko Inc
+ * Author: Graeme Gregory <graeme@openmoko.org>
+ * Copyright 2007 Wolfson Microelectronics PLC.
+ * Author: Graeme Gregory <linux@wolfsonmicro.com>
+ * Copyright 2009 Wolfson Microelectronics
+ *
+ *  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/module.h>
+#include <linux/moduleparam.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/gpio.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+
+#include <asm/mach-types.h>
+
+#include <plat/regs-iis.h>
+
+#include <mach/regs-clock.h>
+#include <asm/io.h>
+#include <mach/gta02.h>
+#include "../codecs/wm8753.h"
+#include "s3c24xx-pcm.h"
+#include "s3c24xx-i2s.h"
+
+static struct snd_soc_card neo1973_gta02;
+
+static int neo1973_gta02_hifi_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 *codec_dai = rtd->dai->codec_dai;
+        struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
+        unsigned int pll_out = 0, bclk = 0;
+        int ret = 0;
+        unsigned long iis_clkrate;
+
+        iis_clkrate = s3c24xx_i2s_get_clockrate();
+
+        switch (params_rate(params)) {
+        case 8000:
+        case 16000:
+                pll_out = 12288000;
+                break;
+        case 48000:
+                bclk = WM8753_BCLK_DIV_4;
+                pll_out = 12288000;
+                break;
+        case 96000:
+                bclk = WM8753_BCLK_DIV_2;
+                pll_out = 12288000;
+                break;
+        case 11025:
+                bclk = WM8753_BCLK_DIV_16;
+                pll_out = 11289600;
+                break;
+        case 22050:
+                bclk = WM8753_BCLK_DIV_8;
+                pll_out = 11289600;
+                break;
+        case 44100:
+                bclk = WM8753_BCLK_DIV_4;
+                pll_out = 11289600;
+                break;
+        case 88200:
+                bclk = WM8753_BCLK_DIV_2;
+                pll_out = 11289600;
+                break;
+        }
+
+        /* set 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 cpu 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;
+
+        /* set the codec system clock for DAC and ADC */
+        ret = snd_soc_dai_set_sysclk(codec_dai, WM8753_MCLK, pll_out,
+                SND_SOC_CLOCK_IN);
+        if (ret < 0)
+                return ret;
+
+        /* set MCLK division for sample rate */
+        ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_MCLK,
+                S3C2410_IISMOD_32FS);
+        if (ret < 0)
+                return ret;
+
+        /* set codec BCLK division for sample rate */
+        ret = snd_soc_dai_set_clkdiv(codec_dai,
+                                        WM8753_BCLKDIV, bclk);
+        if (ret < 0)
+                return ret;
+
+        /* set prescaler division for sample rate */
+        ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_PRESCALER,
+                S3C24XX_PRESCALE(4, 4));
+        if (ret < 0)
+                return ret;
+
+        /* codec PLL input is PCLK/4 */
+        ret = snd_soc_dai_set_pll(codec_dai, WM8753_PLL1,
+                iis_clkrate / 4, pll_out);
+        if (ret < 0)
+                return ret;
+
+        return 0;
+}
+
+static int neo1973_gta02_hifi_hw_free(struct snd_pcm_substream *substream)
+{
+        struct snd_soc_pcm_runtime *rtd = substream->private_data;
+        struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
+
+        /* disable the PLL */
+        return snd_soc_dai_set_pll(codec_dai, WM8753_PLL1, 0, 0);
+}
+
+/*
+ * Neo1973 WM8753 HiFi DAI opserations.
+ */
+static struct snd_soc_ops neo1973_gta02_hifi_ops = {
+        .hw_params = neo1973_gta02_hifi_hw_params,
+        .hw_free = neo1973_gta02_hifi_hw_free,
+};
+
+static int neo1973_gta02_voice_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 *codec_dai = rtd->dai->codec_dai;
+        unsigned int pcmdiv = 0;
+        int ret = 0;
+        unsigned long iis_clkrate;
+
+        iis_clkrate = s3c24xx_i2s_get_clockrate();
+
+        if (params_rate(params) != 8000)
+                return -EINVAL;
+        if (params_channels(params) != 1)
+                return -EINVAL;
+
+        pcmdiv = WM8753_PCM_DIV_6; /* 2.048 MHz */
+
+        /* todo: gg check mode (DSP_B) against CSR datasheet */
+        /* set codec DAI configuration */
+        ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_DSP_B |
+                SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
+        if (ret < 0)
+                return ret;
+
+        /* set the codec system clock for DAC and ADC */
+        ret = snd_soc_dai_set_sysclk(codec_dai, WM8753_PCMCLK,
+                12288000, SND_SOC_CLOCK_IN);
+        if (ret < 0)
+                return ret;
+
+        /* set codec PCM division for sample rate */
+        ret = snd_soc_dai_set_clkdiv(codec_dai, WM8753_PCMDIV,
+                                        pcmdiv);
+        if (ret < 0)
+                return ret;
+
+        /* configue and enable PLL for 12.288MHz output */
+        ret = snd_soc_dai_set_pll(codec_dai, WM8753_PLL2,
+                iis_clkrate / 4, 12288000);
+        if (ret < 0)
+                return ret;
+
+        return 0;
+}
+
+static int neo1973_gta02_voice_hw_free(struct snd_pcm_substream *substream)
+{
+        struct snd_soc_pcm_runtime *rtd = substream->private_data;
+        struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
+
+        /* disable the PLL */
+        return snd_soc_dai_set_pll(codec_dai, WM8753_PLL2, 0, 0);
+}
+
+static struct snd_soc_ops neo1973_gta02_voice_ops = {
+        .hw_params = neo1973_gta02_voice_hw_params,
+        .hw_free = neo1973_gta02_voice_hw_free,
+};
+
+#define LM4853_AMP 1
+#define LM4853_SPK 2
+
+static u8 lm4853_state;
+
+/* This has no effect, it exists only to maintain compatibility with
+ * existing ALSA state files.
+ */
+static int lm4853_set_state(struct snd_kcontrol *kcontrol,
+        struct snd_ctl_elem_value *ucontrol)
+{
+        int val = ucontrol->value.integer.value[0];
+
+        if (val)
+                lm4853_state |= LM4853_AMP;
+        else
+                lm4853_state &= ~LM4853_AMP;
+
+        return 0;
+}
+
+static int lm4853_get_state(struct snd_kcontrol *kcontrol,
+        struct snd_ctl_elem_value *ucontrol)
+{
+        ucontrol->value.integer.value[0] = lm4853_state & LM4853_AMP;
+
+        return 0;
+}
+
+static int lm4853_set_spk(struct snd_kcontrol *kcontrol,
+        struct snd_ctl_elem_value *ucontrol)
+{
+        int val = ucontrol->value.integer.value[0];
+
+        if (val) {
+                lm4853_state |= LM4853_SPK;
+                gpio_set_value(GTA02_GPIO_HP_IN, 0);
+        } else {
+                lm4853_state &= ~LM4853_SPK;
+                gpio_set_value(GTA02_GPIO_HP_IN, 1);
+        }
+
+        return 0;
+}
+
+static int lm4853_get_spk(struct snd_kcontrol *kcontrol,
+        struct snd_ctl_elem_value *ucontrol)
+{
+        ucontrol->value.integer.value[0] = (lm4853_state & LM4853_SPK) >> 1;
+
+        return 0;
+}
+
+static int lm4853_event(struct snd_soc_dapm_widget *w,
+                        struct snd_kcontrol *k,
+                        int event)
+{
+        gpio_set_value(GTA02_GPIO_AMP_SHUT, SND_SOC_DAPM_EVENT_OFF(value));
+
+        return 0;
+}
+
+static const struct snd_soc_dapm_widget wm8753_dapm_widgets[] = {
+        SND_SOC_DAPM_SPK("Stereo Out", lm4853_event),
+        SND_SOC_DAPM_LINE("GSM Line Out", NULL),
+        SND_SOC_DAPM_LINE("GSM Line In", NULL),
+        SND_SOC_DAPM_MIC("Headset Mic", NULL),
+        SND_SOC_DAPM_MIC("Handset Mic", NULL),
+        SND_SOC_DAPM_SPK("Handset Spk", NULL),
+};
+
+
+/* example machine audio_mapnections */
+static const struct snd_soc_dapm_route audio_map[] = {
+
+        /* Connections to the lm4853 amp */
+        {"Stereo Out", NULL, "LOUT1"},
+        {"Stereo Out", NULL, "ROUT1"},
+
+        /* Connections to the GSM Module */
+        {"GSM Line Out", NULL, "MONO1"},
+        {"GSM Line Out", NULL, "MONO2"},
+        {"RXP", NULL, "GSM Line In"},
+        {"RXN", NULL, "GSM Line In"},
+
+        /* Connections to Headset */
+        {"MIC1", NULL, "Mic Bias"},
+        {"Mic Bias", NULL, "Headset Mic"},
+
+        /* Call Mic */
+        {"MIC2", NULL, "Mic Bias"},
+        {"MIC2N", NULL, "Mic Bias"},
+        {"Mic Bias", NULL, "Handset Mic"},
+
+        /* Call Speaker */
+        {"Handset Spk", NULL, "LOUT2"},
+        {"Handset Spk", NULL, "ROUT2"},
+
+        /* Connect the ALC pins */
+        {"ACIN", NULL, "ACOP"},
+};
+
+static const struct snd_kcontrol_new wm8753_neo1973_gta02_controls[] = {
+        SOC_DAPM_PIN_SWITCH("Stereo Out"),
+        SOC_DAPM_PIN_SWITCH("GSM Line Out"),
+        SOC_DAPM_PIN_SWITCH("GSM Line In"),
+        SOC_DAPM_PIN_SWITCH("Headset Mic"),
+        SOC_DAPM_PIN_SWITCH("Handset Mic"),
+        SOC_DAPM_PIN_SWITCH("Handset Spk"),
+
+        /* This has no effect, it exists only to maintain compatibility with
+         * existing ALSA state files.
+         */
+        SOC_SINGLE_EXT("Amp State Switch", 6, 0, 1, 0,
+                lm4853_get_state,
+                lm4853_set_state),
+        SOC_SINGLE_EXT("Amp Spk Switch", 7, 0, 1, 0,
+                lm4853_get_spk,
+                lm4853_set_spk),
+};
+
+/*
+ * This is an example machine initialisation for a wm8753 connected to a
+ * neo1973 GTA02.
+ */
+static int neo1973_gta02_wm8753_init(struct snd_soc_codec *codec)
+{
+        int err;
+
+        /* set up NC codec pins */
+        snd_soc_dapm_nc_pin(codec, "OUT3");
+        snd_soc_dapm_nc_pin(codec, "OUT4");
+        snd_soc_dapm_nc_pin(codec, "LINE1");
+        snd_soc_dapm_nc_pin(codec, "LINE2");
+
+        /* Add neo1973 gta02 specific widgets */
+        snd_soc_dapm_new_controls(codec, wm8753_dapm_widgets,
+                                  ARRAY_SIZE(wm8753_dapm_widgets));
+
+        /* add neo1973 gta02 specific controls */
+        err = snd_soc_add_controls(codec, wm8753_neo1973_gta02_controls,
+                ARRAY_SIZE(wm8753_neo1973_gta02_controls));
+
+        if (err < 0)
+                return err;
+
+        /* set up neo1973 gta02 specific audio path audio_map */
+        snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
+
+        /* set endpoints to default off mode */
+        snd_soc_dapm_disable_pin(codec, "Stereo Out");
+        snd_soc_dapm_disable_pin(codec, "GSM Line Out");
+        snd_soc_dapm_disable_pin(codec, "GSM Line In");
+        snd_soc_dapm_disable_pin(codec, "Headset Mic");
+        snd_soc_dapm_disable_pin(codec, "Handset Mic");
+        snd_soc_dapm_disable_pin(codec, "Handset Spk");
+
+        snd_soc_dapm_sync(codec);
+
+        return 0;
+}
+
+/*
+ * BT Codec DAI
+ */
+static struct snd_soc_dai bt_dai = {
+        .name = "Bluetooth",
+        .id = 0,
+        .playback = {
+                .channels_min = 1,
+                .channels_max = 1,
+                .rates = SNDRV_PCM_RATE_8000,
+                .formats = SNDRV_PCM_FMTBIT_S16_LE,},
+        .capture = {
+                .channels_min = 1,
+                .channels_max = 1,
+                .rates = SNDRV_PCM_RATE_8000,
+                .formats = SNDRV_PCM_FMTBIT_S16_LE,},
+};
+
+static struct snd_soc_dai_link neo1973_gta02_dai[] = {
+{ /* Hifi Playback - for similatious use with voice below */
+        .name = "WM8753",
+        .stream_name = "WM8753 HiFi",
+        .cpu_dai = &s3c24xx_i2s_dai,
+        .codec_dai = &wm8753_dai[WM8753_DAI_HIFI],
+        .init = neo1973_gta02_wm8753_init,
+        .ops = &neo1973_gta02_hifi_ops,
+},
+{ /* Voice via BT */
+        .name = "Bluetooth",
+        .stream_name = "Voice",
+        .cpu_dai = &bt_dai,
+        .codec_dai = &wm8753_dai[WM8753_DAI_VOICE],
+        .ops = &neo1973_gta02_voice_ops,
+},
+};
+
+static struct snd_soc_card neo1973_gta02 = {
+        .name = "neo1973-gta02",
+        .platform = &s3c24xx_soc_platform,
+        .dai_link = neo1973_gta02_dai,
+        .num_links = ARRAY_SIZE(neo1973_gta02_dai),
+};
+
+static struct snd_soc_device neo1973_gta02_snd_devdata = {
+        .card = &neo1973_gta02,
+        .codec_dev = &soc_codec_dev_wm8753,
+};
+
+static struct platform_device *neo1973_gta02_snd_device;
+
+static int __init neo1973_gta02_init(void)
+{
+        int ret;
+
+        if (!machine_is_neo1973_gta02()) {
+                printk(KERN_INFO
+                       "Only GTA02 is supported by this ASoC driver\n");
+                return -ENODEV;
+        }
+
+        /* register bluetooth DAI here */
+        ret = snd_soc_register_dai(&bt_dai);
+        if (ret)
+                return ret;
+
+        neo1973_gta02_snd_device = platform_device_alloc("soc-audio", -1);
+        if (!neo1973_gta02_snd_device)
+                return -ENOMEM;
+
+        platform_set_drvdata(neo1973_gta02_snd_device,
+                        &neo1973_gta02_snd_devdata);
+        neo1973_gta02_snd_devdata.dev = &neo1973_gta02_snd_device->dev;
+        ret = platform_device_add(neo1973_gta02_snd_device);
+
+        if (ret) {
+                platform_device_put(neo1973_gta02_snd_device);
+                return ret;
+        }
+
+        /* Initialise GPIOs used by amp */
+        ret = gpio_request(GTA02_GPIO_HP_IN, "GTA02_HP_IN");
+        if (ret) {
+                pr_err("gta02_wm8753: Failed to register GPIO %d\n", GTA02_GPIO_HP_IN);
+                goto err_unregister_device;
+        }
+
+        ret = gpio_direction_output(GTA02_GPIO_AMP_HP_IN, 1);
+        if (ret) {
+                pr_err("gta02_wm8753: Failed to configure GPIO %d\n", GTA02_GPIO_HP_IN);
+                goto err_free_gpio_hp_in;
+        }
+
+        ret = gpio_request(GTA02_GPIO_AMP_SHUT, "GTA02_AMP_SHUT");
+        if (ret) {
+                pr_err("gta02_wm8753: Failed to register GPIO %d\n", GTA02_GPIO_AMP_SHUT);
+                goto err_free_gpio_hp_in;
+        }
+
+        ret = gpio_direction_output(GTA02_GPIO_AMP_SHUT, 1);
+        if (ret) {
+                pr_err("gta02_wm8753: Failed to configure GPIO %d\n", GTA02_GPIO_AMP_SHUT);
+                goto err_free_gpio_amp_shut;
+        }
+
+        return 0;
+
+err_free_gpio_amp_shut:
+        gpio_free(GTA02_GPIO_AMP_SHUT);
+err_free_gpio_hp_in:
+        gpio_free(GTA02_GPIO_HP_IN);
+err_unregister_device:
+        platform_device_unregister(neo1973_gta02_snd_device);
+        return ret;
+}
+module_init(neo1973_gta02_init);
+
+static void __exit neo1973_gta02_exit(void)
+{
+        snd_soc_unregister_dai(&bt_dai);
+        platform_device_unregister(neo1973_gta02_snd_device);
+        gpio_free(GTA02_GPIO_HP_IN);
+        gpio_free(GTA02_GPIO_AMP_SHUT);
+}
+module_exit(neo1973_gta02_exit);
+
+/* Module information */
+MODULE_AUTHOR("Graeme Gregory, graeme@openmoko.org");
+MODULE_DESCRIPTION("ALSA SoC WM8753 Neo1973 GTA02");
+MODULE_LICENSE("GPL");