--- /dev/null
+/*
+ * raumfeld_audio.c -- SoC audio for Raumfeld audio devices
+ *
+ * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
+ *
+ * based on code from:
+ *
+ * Wolfson Microelectronics PLC.
+ * Openedhand Ltd.
+ * Liam Girdwood <lrg@slimlogic.co.uk>
+ * Richard Purdie <richard@openedhand.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/module.h>
+#include <linux/i2c.h>
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <sound/pcm.h>
+#include <sound/soc.h>
+
+#include <asm/mach-types.h>
+
+#include "pxa-ssp.h"
+
+#define GPIO_SPDIF_RESET (38)
+#define GPIO_MCLK_RESET (111)
+#define GPIO_CODEC_RESET (120)
+
+static struct i2c_client *max9486_client;
+static struct i2c_board_info max9486_hwmon_info = {
+ I2C_BOARD_INFO("max9485", 0x63),
+};
+
+#define MAX9485_MCLK_FREQ_112896 0x22
+#define MAX9485_MCLK_FREQ_122880 0x23
+#define MAX9485_MCLK_FREQ_225792 0x32
+#define MAX9485_MCLK_FREQ_245760 0x33
+
+static void set_max9485_clk(char clk)
+{
+ i2c_master_send(max9486_client, &clk, 1);
+}
+
+static void raumfeld_enable_audio(bool en)
+{
+ if (en) {
+ gpio_set_value(GPIO_MCLK_RESET, 1);
+
+ /* wait some time to let the clocks become stable */
+ msleep(100);
+
+ gpio_set_value(GPIO_SPDIF_RESET, 1);
+ gpio_set_value(GPIO_CODEC_RESET, 1);
+ } else {
+ gpio_set_value(GPIO_MCLK_RESET, 0);
+ gpio_set_value(GPIO_SPDIF_RESET, 0);
+ gpio_set_value(GPIO_CODEC_RESET, 0);
+ }
+}
+
+/* CS4270 */
+static int raumfeld_cs4270_startup(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_dai *codec_dai = rtd->codec_dai;
+
+ /* set freq to 0 to enable all possible codec sample rates */
+ return snd_soc_dai_set_sysclk(codec_dai, 0, 0, 0);
+}
+
+static void raumfeld_cs4270_shutdown(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_dai *codec_dai = rtd->codec_dai;
+
+ /* set freq to 0 to enable all possible codec sample rates */
+ snd_soc_dai_set_sysclk(codec_dai, 0, 0, 0);
+}
+
+static int raumfeld_cs4270_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->codec_dai;
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+ unsigned int clk = 0;
+ int ret = 0;
+
+ switch (params_rate(params)) {
+ case 44100:
+ set_max9485_clk(MAX9485_MCLK_FREQ_112896);
+ clk = 11289600;
+ break;
+ case 48000:
+ set_max9485_clk(MAX9485_MCLK_FREQ_122880);
+ clk = 12288000;
+ break;
+ case 88200:
+ set_max9485_clk(MAX9485_MCLK_FREQ_225792);
+ clk = 22579200;
+ break;
+ case 96000:
+ set_max9485_clk(MAX9485_MCLK_FREQ_245760);
+ clk = 24576000;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ret = snd_soc_dai_set_sysclk(codec_dai, 0, clk, 0);
+ if (ret < 0)
+ return ret;
+
+ /* setup the CPU DAI */
+ ret = snd_soc_dai_set_pll(cpu_dai, 0, 0, 0, clk);
+ if (ret < 0)
+ return ret;
+
+ ret = snd_soc_dai_set_clkdiv(cpu_dai, PXA_SSP_DIV_SCR, 4);
+ if (ret < 0)
+ return ret;
+
+ ret = snd_soc_dai_set_sysclk(cpu_dai, PXA_SSP_CLK_EXT, clk, 1);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static struct snd_soc_ops raumfeld_cs4270_ops = {
+ .startup = raumfeld_cs4270_startup,
+ .shutdown = raumfeld_cs4270_shutdown,
+ .hw_params = raumfeld_cs4270_hw_params,
+};
+
+static int raumfeld_analog_suspend(struct snd_soc_card *card)
+{
+ raumfeld_enable_audio(false);
+ return 0;
+}
+
+static int raumfeld_analog_resume(struct snd_soc_card *card)
+{
+ raumfeld_enable_audio(true);
+ return 0;
+}
+
+/* AK4104 */
+
+static int raumfeld_ak4104_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->cpu_dai;
+ int ret = 0, clk = 0;
+
+ switch (params_rate(params)) {
+ case 44100:
+ set_max9485_clk(MAX9485_MCLK_FREQ_112896);
+ clk = 11289600;
+ break;
+ case 48000:
+ set_max9485_clk(MAX9485_MCLK_FREQ_122880);
+ clk = 12288000;
+ break;
+ case 88200:
+ set_max9485_clk(MAX9485_MCLK_FREQ_225792);
+ clk = 22579200;
+ break;
+ case 96000:
+ set_max9485_clk(MAX9485_MCLK_FREQ_245760);
+ clk = 24576000;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /* setup the CPU DAI */
+ ret = snd_soc_dai_set_pll(cpu_dai, 0, 0, 0, clk);
+ if (ret < 0)
+ return ret;
+
+ ret = snd_soc_dai_set_clkdiv(cpu_dai, PXA_SSP_DIV_SCR, 4);
+ if (ret < 0)
+ return ret;
+
+ ret = snd_soc_dai_set_sysclk(cpu_dai, PXA_SSP_CLK_EXT, clk, 1);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static struct snd_soc_ops raumfeld_ak4104_ops = {
+ .hw_params = raumfeld_ak4104_hw_params,
+};
+
+#define DAI_LINK_CS4270 \
+{ \
+ .name = "CS4270", \
+ .stream_name = "CS4270", \
+ .cpu_dai_name = "pxa-ssp-dai.0", \
+ .platform_name = "pxa-pcm-audio", \
+ .codec_dai_name = "cs4270-hifi", \
+ .codec_name = "cs4270.0-0048", \
+ .dai_fmt = SND_SOC_DAIFMT_I2S | \
+ SND_SOC_DAIFMT_NB_NF | \
+ SND_SOC_DAIFMT_CBS_CFS, \
+ .ops = &raumfeld_cs4270_ops, \
+}
+
+#define DAI_LINK_AK4104 \
+{ \
+ .name = "ak4104", \
+ .stream_name = "Playback", \
+ .cpu_dai_name = "pxa-ssp-dai.1", \
+ .codec_dai_name = "ak4104-hifi", \
+ .platform_name = "pxa-pcm-audio", \
+ .dai_fmt = SND_SOC_DAIFMT_I2S | \
+ SND_SOC_DAIFMT_NB_NF | \
+ SND_SOC_DAIFMT_CBS_CFS, \
+ .ops = &raumfeld_ak4104_ops, \
+ .codec_name = "spi0.0", \
+}
+
+static struct snd_soc_dai_link snd_soc_raumfeld_connector_dai[] =
+{
+ DAI_LINK_CS4270,
+ DAI_LINK_AK4104,
+};
+
+static struct snd_soc_dai_link snd_soc_raumfeld_speaker_dai[] =
+{
+ DAI_LINK_CS4270,
+};
+
+static struct snd_soc_card snd_soc_raumfeld_connector = {
+ .name = "Raumfeld Connector",
+ .owner = THIS_MODULE,
+ .dai_link = snd_soc_raumfeld_connector_dai,
+ .num_links = ARRAY_SIZE(snd_soc_raumfeld_connector_dai),
+ .suspend_post = raumfeld_analog_suspend,
+ .resume_pre = raumfeld_analog_resume,
+};
+
+static struct snd_soc_card snd_soc_raumfeld_speaker = {
+ .name = "Raumfeld Speaker",
+ .owner = THIS_MODULE,
+ .dai_link = snd_soc_raumfeld_speaker_dai,
+ .num_links = ARRAY_SIZE(snd_soc_raumfeld_speaker_dai),
+ .suspend_post = raumfeld_analog_suspend,
+ .resume_pre = raumfeld_analog_resume,
+};
+
+static struct platform_device *raumfeld_audio_device;
+
+static int __init raumfeld_audio_init(void)
+{
+ int ret;
+
+ if (!machine_is_raumfeld_speaker() &&
+ !machine_is_raumfeld_connector())
+ return 0;
+
+ max9486_client = i2c_new_device(i2c_get_adapter(0),
+ &max9486_hwmon_info);
+
+ if (!max9486_client)
+ return -ENOMEM;
+
+ set_max9485_clk(MAX9485_MCLK_FREQ_122880);
+
+ /* Register analog device */
+ raumfeld_audio_device = platform_device_alloc("soc-audio", 0);
+ if (!raumfeld_audio_device)
+ return -ENOMEM;
+
+ if (machine_is_raumfeld_speaker())
+ platform_set_drvdata(raumfeld_audio_device,
+ &snd_soc_raumfeld_speaker);
+
+ if (machine_is_raumfeld_connector())
+ platform_set_drvdata(raumfeld_audio_device,
+ &snd_soc_raumfeld_connector);
+
+ ret = platform_device_add(raumfeld_audio_device);
+ if (ret < 0) {
+ platform_device_put(raumfeld_audio_device);
+ return ret;
+ }
+
+ raumfeld_enable_audio(true);
+ return 0;
+}
+
+static void __exit raumfeld_audio_exit(void)
+{
+ raumfeld_enable_audio(false);
+
+ platform_device_unregister(raumfeld_audio_device);
+
+ i2c_unregister_device(max9486_client);
+
+ gpio_free(GPIO_MCLK_RESET);
+ gpio_free(GPIO_CODEC_RESET);
+ gpio_free(GPIO_SPDIF_RESET);
+}
+
+module_init(raumfeld_audio_init);
+module_exit(raumfeld_audio_exit);
+
+/* Module information */
+MODULE_AUTHOR("Daniel Mack <daniel@caiaq.de>");
+MODULE_DESCRIPTION("Raumfeld audio SoC");
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff