[alsa-devel] [PATCH] ASoC: EDB93xx machine sound driver with CS4271
Alexander Sverdlin
subaparts at yandex.ru
Fri Jan 21 23:44:42 CET 2011
From: Alexander Sverdlin <subaparts at yandex.ru>
Added support for EDB93xx sound with CS4271 CODEC.
Features:
- Playback, Capture
- Sample rates from 8kHz to 96kHz tested
Limitations:
- No DAPM support
PS. The same code as submitted on 8 Dec 2010, but now all dependencies are applied.
Signed-off-by: Alexander Sverdlin <subaparts at yandex.ru>
---
arch/arm/mach-ep93xx/edb93xx.c | 54 +++++++++++++++
sound/soc/ep93xx/Kconfig | 9 +++
sound/soc/ep93xx/Makefile | 2 +
sound/soc/ep93xx/edb93xx.c | 142 ++++++++++++++++++++++++++++++++++++++++
4 files changed, 207 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-ep93xx/edb93xx.c b/arch/arm/mach-ep93xx/edb93xx.c
index 4b04316..f453e5a 100644
--- a/arch/arm/mach-ep93xx/edb93xx.c
+++ b/arch/arm/mach-ep93xx/edb93xx.c
@@ -30,12 +30,21 @@
#include <linux/gpio.h>
#include <linux/i2c.h>
#include <linux/i2c-gpio.h>
+#include <linux/spi/spi.h>
+#include <mach/ep93xx_spi.h>
#include <mach/hardware.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
+#include <sound/cs4271.h>
+
+#define edb93xx_has_audio() (machine_is_edb9301() || \
+ machine_is_edb9302() || \
+ machine_is_edb9302a() || \
+ machine_is_edb9307a() || \
+ machine_is_edb9315a())
static void __init edb93xx_register_flash(void)
{
@@ -93,6 +102,49 @@ static void __init edb93xx_register_i2c(void)
/*************************************************************************
+ * EDB93xx SPI peripheral handling
+ *************************************************************************/
+static struct cs4271_platform_data cs4271_edb93xx_gpio = {
+ .gpio_nreset = EP93XX_GPIO_LINE_EGPIO1,
+ .gpio_disable = EP93XX_GPIO_LINE_EGPIO6,
+};
+
+static struct spi_board_info edb93xx_spi_board_info[] = {
+ {
+ .modalias = "cs4271-codec",
+ .max_speed_hz = 6000000,
+ .bus_num = 0,
+ .chip_select = 0,
+ .mode = SPI_MODE_3,
+ .platform_data = &cs4271_edb93xx_gpio,
+ },
+};
+
+static struct ep93xx_spi_info edb93xx_spi_info = {
+ .num_chipselect = ARRAY_SIZE(edb93xx_spi_board_info),
+};
+
+static void __init edb93xx_register_spi(void)
+{
+ if (edb93xx_has_audio()) {
+ ep93xx_register_spi(&edb93xx_spi_info,
+ edb93xx_spi_board_info,
+ ARRAY_SIZE(edb93xx_spi_board_info));
+ }
+}
+
+/*************************************************************************
+ * EDB93xx I2S
+ *************************************************************************/
+static void __init edb93xx_register_i2s(void)
+{
+ if (edb93xx_has_audio()) {
+ ep93xx_register_i2s();
+ }
+}
+
+
+/*************************************************************************
* EDB93xx pwm
*************************************************************************/
static void __init edb93xx_register_pwm(void)
@@ -117,6 +169,8 @@ static void __init edb93xx_init_machine(void)
edb93xx_register_flash();
ep93xx_register_eth(&edb93xx_eth_data, 1);
edb93xx_register_i2c();
+ edb93xx_register_spi();
+ edb93xx_register_i2s();
edb93xx_register_pwm();
}
diff --git a/sound/soc/ep93xx/Kconfig b/sound/soc/ep93xx/Kconfig
index 5742904..91a28de 100644
--- a/sound/soc/ep93xx/Kconfig
+++ b/sound/soc/ep93xx/Kconfig
@@ -30,3 +30,12 @@ config SND_EP93XX_SOC_SIMONE
help
Say Y or M here if you want to add support for AC97 audio on the
Simplemachines Sim.One board.
+
+config SND_EP93XX_SOC_EDB93XX
+ tristate "SoC Audio support for Cirrus Logic EDB93xx boards"
+ depends on SND_EP93XX_SOC && (MACH_EDB9301 || MACH_EDB9302 || MACH_EDB9302A || MACH_EDB9307A || MACH_EDB9315A)
+ select SND_EP93XX_SOC_I2S
+ select SND_SOC_CS4271
+ help
+ Say Y or M here if you want to add support for I2S audio on the
+ Cirrus Logic EDB93xx boards.
diff --git a/sound/soc/ep93xx/Makefile b/sound/soc/ep93xx/Makefile
index 8e7977f..5514146 100644
--- a/sound/soc/ep93xx/Makefile
+++ b/sound/soc/ep93xx/Makefile
@@ -10,6 +10,8 @@ obj-$(CONFIG_SND_EP93XX_SOC_AC97) += snd-soc-ep93xx-ac97.o
# EP93XX Machine Support
snd-soc-snappercl15-objs := snappercl15.o
snd-soc-simone-objs := simone.o
+snd-soc-edb93xx-objs := edb93xx.o
obj-$(CONFIG_SND_EP93XX_SOC_SNAPPERCL15) += snd-soc-snappercl15.o
obj-$(CONFIG_SND_EP93XX_SOC_SIMONE) += snd-soc-simone.o
+obj-$(CONFIG_SND_EP93XX_SOC_EDB93XX) += snd-soc-edb93xx.o
diff --git a/sound/soc/ep93xx/edb93xx.c b/sound/soc/ep93xx/edb93xx.c
new file mode 100644
index 0000000..b270085
--- /dev/null
+++ b/sound/soc/ep93xx/edb93xx.c
@@ -0,0 +1,142 @@
+/*
+ * SoC audio for EDB93xx
+ *
+ * Copyright (c) 2010 Alexander Sverdlin <subaparts at yandex.ru>
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * This driver support CS4271 codec being master or slave, working
+ * in control port mode, connected either via SPI or I2C.
+ * The data format accepted is I2S or left-justified.
+ * DAPM support not implemented.
+ */
+
+#include <linux/platform_device.h>
+#include <linux/gpio.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/soc.h>
+#include <asm/mach-types.h>
+#include <mach/hardware.h>
+#include "ep93xx-pcm.h"
+
+#define edb93xx_has_audio() (machine_is_edb9301() || \
+ machine_is_edb9302() || \
+ machine_is_edb9302a() || \
+ machine_is_edb9307a() || \
+ machine_is_edb9315a())
+
+static int edb93xx_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;
+ int err;
+ unsigned int rate = params_rate(params);
+ /*
+ * We set LRCLK equal to `rate' and SCLK = LRCLK * 64,
+ * because our sample size is 32 bit * 2 channels.
+ * I2S standard permits us to transmit more bits than
+ * the codec uses.
+ * MCLK = SCLK * 4 is the best recommended value,
+ * but we have to fall back to ratio 2 for higher
+ * sample rates.
+ */
+ unsigned int mclk_rate = rate * 64 * ((rate <= 48000) ? 4 : 2);
+
+ err = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
+ SND_SOC_DAIFMT_NB_IF |
+ SND_SOC_DAIFMT_CBS_CFS);
+ if (err)
+ return err;
+
+ err = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
+ SND_SOC_DAIFMT_NB_IF |
+ SND_SOC_DAIFMT_CBS_CFS);
+ if (err)
+ return err;
+
+ err = snd_soc_dai_set_sysclk(codec_dai, 0, mclk_rate,
+ SND_SOC_CLOCK_IN);
+ if (err)
+ return err;
+
+ return snd_soc_dai_set_sysclk(cpu_dai, 0, mclk_rate,
+ SND_SOC_CLOCK_OUT);
+}
+
+static struct snd_soc_ops edb93xx_ops = {
+ .hw_params = edb93xx_hw_params,
+};
+
+static struct snd_soc_dai_link edb93xx_dai = {
+ .name = "CS4271",
+ .stream_name = "CS4271 HiFi",
+ .platform_name = "ep93xx-pcm-audio",
+ .cpu_dai_name = "ep93xx-i2s",
+ .codec_name = "spi0.0",
+ .codec_dai_name = "cs4271-hifi",
+ .ops = &edb93xx_ops,
+};
+
+static struct snd_soc_card snd_soc_edb93xx = {
+ .name = "EDB93XX",
+ .dai_link = &edb93xx_dai,
+ .num_links = 1,
+};
+
+static struct platform_device *edb93xx_snd_device;
+
+static int __init edb93xx_init(void)
+{
+ int ret;
+
+ if (!edb93xx_has_audio())
+ return -ENODEV;
+
+ ret = ep93xx_i2s_acquire(EP93XX_SYSCON_DEVCFG_I2SONAC97,
+ EP93XX_SYSCON_I2SCLKDIV_ORIDE |
+ EP93XX_SYSCON_I2SCLKDIV_SPOL);
+ if (ret)
+ return ret;
+
+ edb93xx_snd_device = platform_device_alloc("soc-audio", -1);
+ if (!edb93xx_snd_device) {
+ ret = -ENOMEM;
+ goto free_i2s;
+ }
+
+ platform_set_drvdata(edb93xx_snd_device, &snd_soc_edb93xx);
+ ret = platform_device_add(edb93xx_snd_device);
+ if (ret)
+ goto device_put;
+
+ return 0;
+
+device_put:
+ platform_device_put(edb93xx_snd_device);
+free_i2s:
+ ep93xx_i2s_release();
+ return ret;
+}
+module_init(edb93xx_init);
+
+static void __exit edb93xx_exit(void)
+{
+ platform_device_unregister(edb93xx_snd_device);
+ ep93xx_i2s_release();
+}
+module_exit(edb93xx_exit);
+
+MODULE_AUTHOR("Alexander Sverdlin <subaparts at yandex.ru>");
+MODULE_DESCRIPTION("ALSA SoC EDB93xx");
+MODULE_LICENSE("GPL");
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