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@@ -0,0 +1,652 @@
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+/*
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+ * File: sound/soc/codecs/ad1938.c
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+ * Author: Barry Song <Barry.Song@analog.com>
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+ *
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+ * Created: June 04 2009
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+ * Description: Driver for AD1938 sound chip
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+ *
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+ * Modified:
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+ * Copyright 2009 Analog Devices Inc.
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+ *
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+ * Bugs: Enter bugs at http://blackfin.uclinux.org/
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License as published by
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+ * the Free Software Foundation; either version 2 of the License, or
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+ * (at your option) any later version.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with this program; if not, see the file COPYING, or write
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+ * to the Free Software Foundation, Inc.,
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+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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+ */
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+
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+#include <linux/init.h>
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+#include <linux/module.h>
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+#include <linux/version.h>
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+#include <linux/kernel.h>
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+#include <linux/device.h>
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+#include <sound/core.h>
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+#include <sound/pcm.h>
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+#include <sound/pcm_params.h>
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+#include <sound/initval.h>
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+#include <sound/soc.h>
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+#include <sound/tlv.h>
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+#include <sound/soc-dapm.h>
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+#include <linux/spi/spi.h>
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+#include "ad1938.h"
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+
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+/* codec private data */
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+struct ad1938_priv {
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+ struct snd_soc_codec codec;
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+ u8 reg_cache[AD1938_NUM_REGS];
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+
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+};
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+
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+static struct snd_soc_codec *ad1938_codec;
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+struct snd_soc_codec_device soc_codec_dev_ad1938;
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+static int ad1938_register(struct ad1938_priv *ad1938);
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+static void ad1938_unregister(struct ad1938_priv *ad1938);
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+
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+/*
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+ * AD1938 volume/mute/de-emphasis etc. controls
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+ */
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+static const char *ad1938_deemp[] = {"None", "48kHz", "44.1kHz", "32kHz"};
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+
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+static const struct soc_enum ad1938_deemp_enum =
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+ SOC_ENUM_SINGLE(AD1938_DAC_CTRL2, 1, 4, ad1938_deemp);
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+
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+static const struct snd_kcontrol_new ad1938_snd_controls[] = {
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+ /* DAC volume control */
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+ SOC_DOUBLE_R("DAC1 Volume", AD1938_DAC_L1_VOL,
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+ AD1938_DAC_R1_VOL, 0, 0xFF, 1),
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+ SOC_DOUBLE_R("DAC2 Volume", AD1938_DAC_L2_VOL,
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+ AD1938_DAC_R2_VOL, 0, 0xFF, 1),
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+ SOC_DOUBLE_R("DAC3 Volume", AD1938_DAC_L3_VOL,
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+ AD1938_DAC_R3_VOL, 0, 0xFF, 1),
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+ SOC_DOUBLE_R("DAC4 Volume", AD1938_DAC_L4_VOL,
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+ AD1938_DAC_R4_VOL, 0, 0xFF, 1),
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+
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+ /* ADC switch control */
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+ SOC_DOUBLE("ADC1 Switch", AD1938_ADC_CTRL0, AD1938_ADCL1_MUTE, AD1938_ADCR1_MUTE, 1, 1),
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+ SOC_DOUBLE("ADC2 Switch", AD1938_ADC_CTRL0, AD1938_ADCL2_MUTE, AD1938_ADCR2_MUTE, 1, 1),
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+
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+ /* DAC switch control */
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+ SOC_DOUBLE("DAC1 Switch", AD1938_DAC_CHNL_MUTE, AD1938_DACL1_MUTE, AD1938_DACR1_MUTE, 1, 1),
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+ SOC_DOUBLE("DAC2 Switch", AD1938_DAC_CHNL_MUTE, AD1938_DACL2_MUTE, AD1938_DACR2_MUTE, 1, 1),
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+ SOC_DOUBLE("DAC3 Switch", AD1938_DAC_CHNL_MUTE, AD1938_DACL3_MUTE, AD1938_DACR3_MUTE, 1, 1),
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+ SOC_DOUBLE("DAC4 Switch", AD1938_DAC_CHNL_MUTE, AD1938_DACL4_MUTE, AD1938_DACR4_MUTE, 1, 1),
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+
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+ /* ADC high-pass filter */
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+ SOC_SINGLE("ADC High Pass Filter Switch", AD1938_ADC_CTRL0,
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+ AD1938_ADC_HIGHPASS_FILTER, 1, 0),
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+
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+ /* DAC de-emphasis */
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+ SOC_ENUM("Playback Deemphasis", ad1938_deemp_enum),
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+};
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+
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+static const struct snd_soc_dapm_widget ad1938_dapm_widgets[] = {
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+ SND_SOC_DAPM_DAC("DAC", "Playback", AD1938_DAC_CTRL0, 0, 1),
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+ SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM, 0, 0),
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+ SND_SOC_DAPM_SUPPLY("ADC_PWR", AD1938_ADC_CTRL0, 0, 1, NULL, 0),
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+};
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+
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+static const struct snd_soc_dapm_route audio_paths[] = {
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+ { "DAC", NULL, "ADC_PWR" },
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+ { "ADC", NULL, "ADC_PWR" },
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+};
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+
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+/*
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+ * DAI ops entries
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+ */
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+
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+static int ad1938_mute(struct snd_soc_dai *dai, int mute)
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+{
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+ struct snd_soc_codec *codec = dai->codec;
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+ int reg;
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+
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+ reg = codec->read(codec, AD1938_DAC_CTRL2);
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+ reg = (mute > 0) ? reg | AD1938_DAC_MASTER_MUTE : reg & (~AD1938_DAC_MASTER_MUTE);
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+ codec->write(codec, AD1938_DAC_CTRL2, reg);
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+
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+ return 0;
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+}
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+
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+static inline int ad1938_pll_powerctrl(struct snd_soc_codec *codec, int cmd)
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+{
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+ int reg = codec->read(codec, AD1938_PLL_CLK_CTRL0);
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+ reg = (cmd > 0) ? reg & (~AD1938_PLL_POWERDOWN) : reg | AD1938_PLL_POWERDOWN;
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+ codec->write(codec, AD1938_PLL_CLK_CTRL0, reg);
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+
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+ return 0;
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+}
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+
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+static int ad1938_set_tdm_slot(struct snd_soc_dai *dai,
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+ unsigned int mask, int slots)
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+{
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+ struct snd_soc_codec *codec = dai->codec;
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+ int dac_reg = codec->read(codec, AD1938_DAC_CTRL1);
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+ int adc_reg = codec->read(codec, AD1938_ADC_CTRL2);
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+
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+ dac_reg &= ~AD1938_DAC_CHAN_MASK;
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+ adc_reg &= ~AD1938_ADC_CHAN_MASK;
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+
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+ switch(slots) {
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+ case 2:
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+ dac_reg |= AD1938_DAC_2_CHANNELS << AD1938_DAC_CHAN_SHFT;
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+ adc_reg |= AD1938_ADC_2_CHANNELS << AD1938_ADC_CHAN_SHFT;
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+ break;
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+ case 4:
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+ dac_reg |= AD1938_DAC_4_CHANNELS << AD1938_DAC_CHAN_SHFT;
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+ adc_reg |= AD1938_ADC_4_CHANNELS << AD1938_ADC_CHAN_SHFT;
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+ break;
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+ case 8:
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+ dac_reg |= AD1938_DAC_8_CHANNELS << AD1938_DAC_CHAN_SHFT;
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+ adc_reg |= AD1938_ADC_8_CHANNELS << AD1938_ADC_CHAN_SHFT;
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+ break;
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+ case 16:
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+ dac_reg |= AD1938_DAC_16_CHANNELS << AD1938_DAC_CHAN_SHFT;
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+ adc_reg |= AD1938_ADC_16_CHANNELS << AD1938_ADC_CHAN_SHFT;
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+ break;
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+ default:
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+ return -EINVAL;
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+ }
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+
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+ codec->write(codec, AD1938_DAC_CTRL1, dac_reg);
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+ codec->write(codec, AD1938_ADC_CTRL2, adc_reg);
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+
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+ return 0;
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+}
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+
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+static int ad1938_set_dai_fmt(struct snd_soc_dai *codec_dai,
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+ unsigned int fmt)
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+{
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+ struct snd_soc_codec *codec = codec_dai->codec;
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+ int adc_reg, dac_reg;
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+
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+ adc_reg = codec->read(codec, AD1938_ADC_CTRL2);
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+ dac_reg = codec->read(codec, AD1938_DAC_CTRL1);
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+
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+ /* At present, the driver only support AUX ADC mode(SND_SOC_DAIFMT_I2S with TDM)
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+ * and ADC&DAC TDM mode(SND_SOC_DAIFMT_DSP_A)
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+ */
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+ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
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+ case SND_SOC_DAIFMT_I2S:
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+ adc_reg &= ~AD1938_ADC_SERFMT_MASK;
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+ adc_reg |= AD1938_ADC_SERFMT_TDM;
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+ break;
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+ case SND_SOC_DAIFMT_DSP_A:
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+ adc_reg &= ~AD1938_ADC_SERFMT_MASK;
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+ adc_reg |= AD1938_ADC_SERFMT_AUX;
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+ break;
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+ default:
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+ return -EINVAL;
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+ }
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+
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+ switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
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+ case SND_SOC_DAIFMT_NB_NF: /* normal bit clock + frame */
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+ adc_reg &= ~AD1938_ADC_LEFT_HIGH;
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+ adc_reg &= ~AD1938_ADC_BCLK_INV;
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+ dac_reg &= ~AD1938_DAC_LEFT_HIGH;
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+ dac_reg &= ~AD1938_DAC_BCLK_INV;
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+ break;
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+ case SND_SOC_DAIFMT_NB_IF: /* normal bclk + invert frm */
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+ adc_reg |= AD1938_ADC_LEFT_HIGH;
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+ adc_reg &= ~AD1938_ADC_BCLK_INV;
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+ dac_reg |= AD1938_DAC_LEFT_HIGH;
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+ dac_reg &= ~AD1938_DAC_BCLK_INV;
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+ break;
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+ case SND_SOC_DAIFMT_IB_NF: /* invert bclk + normal frm */
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+ adc_reg &= ~AD1938_ADC_LEFT_HIGH;
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+ adc_reg |= AD1938_ADC_BCLK_INV;
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+ dac_reg &= ~AD1938_DAC_LEFT_HIGH;
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+ dac_reg |= AD1938_DAC_BCLK_INV;
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+ break;
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+
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+ case SND_SOC_DAIFMT_IB_IF: /* invert bclk + frm */
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+ adc_reg |= AD1938_ADC_LEFT_HIGH;
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+ adc_reg |= AD1938_ADC_BCLK_INV;
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+ dac_reg |= AD1938_DAC_LEFT_HIGH;
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+ dac_reg |= AD1938_DAC_BCLK_INV;
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+ break;
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+ default:
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+ return -EINVAL;
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+ }
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+
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+ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
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+ case SND_SOC_DAIFMT_CBM_CFM: /* codec clk & frm master */
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+ adc_reg |= AD1938_ADC_LCR_MASTER;
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+ adc_reg |= AD1938_ADC_BCLK_MASTER;
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+ dac_reg |= AD1938_DAC_LCR_MASTER;
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+ dac_reg |= AD1938_DAC_BCLK_MASTER;
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+ break;
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+ case SND_SOC_DAIFMT_CBS_CFM: /* codec clk slave & frm master */
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+ adc_reg |= AD1938_ADC_LCR_MASTER;
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+ adc_reg &= ~AD1938_ADC_BCLK_MASTER;
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+ dac_reg |= AD1938_DAC_LCR_MASTER;
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+ dac_reg &= ~AD1938_DAC_BCLK_MASTER;
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+ break;
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+ case SND_SOC_DAIFMT_CBM_CFS: /* codec clk master & frame slave */
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+ adc_reg &= ~AD1938_ADC_LCR_MASTER;
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+ adc_reg |= AD1938_ADC_BCLK_MASTER;
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+ dac_reg &= ~AD1938_DAC_LCR_MASTER;
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+ dac_reg |= AD1938_DAC_BCLK_MASTER;
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+ break;
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+ case SND_SOC_DAIFMT_CBS_CFS: /* codec clk & frm slave */
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+ adc_reg &= ~AD1938_ADC_LCR_MASTER;
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+ adc_reg &= ~AD1938_ADC_BCLK_MASTER;
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+ dac_reg &= ~AD1938_DAC_LCR_MASTER;
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+ dac_reg &= ~AD1938_DAC_BCLK_MASTER;
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+ break;
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+ default:
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+ return -EINVAL;
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+ }
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+
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+ codec->write(codec, AD1938_ADC_CTRL2, adc_reg);
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+ codec->write(codec, AD1938_DAC_CTRL1, dac_reg);
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+
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+ return 0;
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+}
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+
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+static int ad1938_hw_params(struct snd_pcm_substream *substream,
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+ struct snd_pcm_hw_params *params,
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+ struct snd_soc_dai *dai)
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+{
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+ int word_len = 0, reg = 0;
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+
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+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
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+ struct snd_soc_device *socdev = rtd->socdev;
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+ struct snd_soc_codec *codec = socdev->card->codec;
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+
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+ /* bit size */
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+ switch (params_format(params)) {
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+ case SNDRV_PCM_FORMAT_S16_LE:
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+ word_len = 3;
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+ break;
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+ case SNDRV_PCM_FORMAT_S20_3LE:
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+ word_len = 1;
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+ break;
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+ case SNDRV_PCM_FORMAT_S24_LE:
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+ case SNDRV_PCM_FORMAT_S32_LE:
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+ word_len = 0;
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+ break;
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+ }
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+
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+ reg = codec->read(codec, AD1938_DAC_CTRL2);
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+ reg = (reg & (~AD1938_DAC_WORD_LEN_MASK)) | word_len;
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+ codec->write(codec, AD1938_DAC_CTRL2, reg);
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+
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+ reg = codec->read(codec, AD1938_ADC_CTRL1);
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+ reg = (reg & (~AD1938_ADC_WORD_LEN_MASK)) | word_len;
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+ codec->write(codec, AD1938_ADC_CTRL1, reg);
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+
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+ return 0;
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+}
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+
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+static int ad1938_set_bias_level(struct snd_soc_codec *codec,
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+ enum snd_soc_bias_level level)
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+{
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+ switch (level) {
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+ case SND_SOC_BIAS_ON:
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+ ad1938_pll_powerctrl(codec, 1);
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+ break;
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+ case SND_SOC_BIAS_PREPARE:
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+ break;
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+ case SND_SOC_BIAS_STANDBY:
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+ case SND_SOC_BIAS_OFF:
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+ ad1938_pll_powerctrl(codec, 0);
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+ break;
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+ }
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+ codec->bias_level = level;
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+ return 0;
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+}
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+
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+/*
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+ * interface to read/write ad1938 register
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+ */
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+
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+#define AD1938_SPI_ADDR 0x4
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+#define AD1938_SPI_READ 0x1
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+#define AD1938_SPI_BUFLEN 3
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+
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+/*
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+ * write to the ad1938 register space
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+ */
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+
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+static int ad1938_write_reg(struct snd_soc_codec *codec, unsigned int reg,
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+ unsigned int value)
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+{
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+ u8 *reg_cache = codec->reg_cache;
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+ int ret = 0;
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+
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+ if(value != reg_cache[reg]) {
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+ uint8_t buf[AD1938_SPI_BUFLEN];
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+ struct spi_transfer t = {
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+ .tx_buf = buf,
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+ .len = AD1938_SPI_BUFLEN,
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+ };
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+ struct spi_message m;
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+
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+ buf[0] = AD1938_SPI_ADDR << 1;
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+ buf[1] = reg;
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+ buf[2] = value;
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+ spi_message_init(&m);
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+ spi_message_add_tail(&t, &m);
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+ if((ret = spi_sync(codec->control_data, &m)) == 0)
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+ reg_cache[reg] = value;
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+ }
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+
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+ return ret;
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+}
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+
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+/*
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+ * read from the ad1938 register space cache
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+ */
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+
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+static unsigned int ad1938_read_reg_cache(struct snd_soc_codec *codec,
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+ unsigned int reg)
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+{
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+ u8 *reg_cache = codec->reg_cache;
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+
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+ if (reg >= codec->reg_cache_size)
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+ return -EINVAL;
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+
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+ return reg_cache[reg];
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+}
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+
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+/*
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+ * read from the ad1938 register space
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+ */
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+
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+static unsigned int ad1938_read_reg(struct snd_soc_codec *codec, unsigned int reg)
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+{
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+ char w_buf[AD1938_SPI_BUFLEN];
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+ char r_buf[AD1938_SPI_BUFLEN];
|
|
|
+ int ret;
|
|
|
+
|
|
|
+ struct spi_transfer t = {
|
|
|
+ .tx_buf = w_buf,
|
|
|
+ .rx_buf = r_buf,
|
|
|
+ .len = AD1938_SPI_BUFLEN,
|
|
|
+ };
|
|
|
+ struct spi_message m;
|
|
|
+
|
|
|
+ w_buf[0] = (AD1938_SPI_ADDR << 1) | AD1938_SPI_READ;
|
|
|
+ w_buf[1] = reg;
|
|
|
+ w_buf[2] = 0;
|
|
|
+
|
|
|
+ spi_message_init(&m);
|
|
|
+ spi_message_add_tail(&t, &m);
|
|
|
+ ret = spi_sync(codec->control_data, &m);
|
|
|
+ if (ret == 0)
|
|
|
+ return r_buf[2];
|
|
|
+ else
|
|
|
+ return -EIO;
|
|
|
+}
|
|
|
+
|
|
|
+static int ad1938_fill_cache(struct snd_soc_codec *codec)
|
|
|
+{
|
|
|
+ int i;
|
|
|
+ u8 *reg_cache = codec->reg_cache;
|
|
|
+ struct spi_device *spi = codec->control_data;
|
|
|
+
|
|
|
+ for (i = 0; i < codec->reg_cache_size; i++) {
|
|
|
+ int ret = ad1938_read_reg(codec, i);
|
|
|
+ if (ret == -EIO) {
|
|
|
+ dev_err(&spi->dev, "AD1938 SPI read failure\n");
|
|
|
+ return ret;
|
|
|
+ }
|
|
|
+ reg_cache[i] = ret;
|
|
|
+ }
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static int __devinit ad1938_spi_probe(struct spi_device *spi)
|
|
|
+{
|
|
|
+ struct snd_soc_codec *codec;
|
|
|
+ struct ad1938_priv *ad1938;
|
|
|
+
|
|
|
+ ad1938 = kzalloc(sizeof(struct ad1938_priv), GFP_KERNEL);
|
|
|
+ if (ad1938 == NULL)
|
|
|
+ return -ENOMEM;
|
|
|
+
|
|
|
+ codec = &ad1938->codec;
|
|
|
+ codec->control_data = spi;
|
|
|
+ codec->dev = &spi->dev;
|
|
|
+
|
|
|
+ spi->dev.driver_data = ad1938;
|
|
|
+
|
|
|
+ return ad1938_register(ad1938);
|
|
|
+}
|
|
|
+
|
|
|
+static int __devexit ad1938_spi_remove(struct spi_device *spi)
|
|
|
+{
|
|
|
+ struct ad1938_priv *ad1938 = spi->dev.driver_data;
|
|
|
+
|
|
|
+ ad1938_unregister(ad1938);
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static struct spi_driver ad1938_spi_driver = {
|
|
|
+ .driver = {
|
|
|
+ .name = "ad1938-spi",
|
|
|
+ .bus = &spi_bus_type,
|
|
|
+ .owner = THIS_MODULE,
|
|
|
+ },
|
|
|
+ .probe = ad1938_spi_probe,
|
|
|
+ .remove = __devexit_p(ad1938_spi_remove),
|
|
|
+};
|
|
|
+
|
|
|
+static struct snd_soc_dai_ops ad1938_dai_ops = {
|
|
|
+ .hw_params = ad1938_hw_params,
|
|
|
+ .digital_mute = ad1938_mute,
|
|
|
+ .set_tdm_slot = ad1938_set_tdm_slot,
|
|
|
+ .set_fmt = ad1938_set_dai_fmt,
|
|
|
+};
|
|
|
+
|
|
|
+/* codec DAI instance */
|
|
|
+struct snd_soc_dai ad1938_dai = {
|
|
|
+ .name = "AD1938",
|
|
|
+ .playback = {
|
|
|
+ .stream_name = "Playback",
|
|
|
+ .channels_min = 2,
|
|
|
+ .channels_max = 8,
|
|
|
+ .rates = SNDRV_PCM_RATE_48000,
|
|
|
+ .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE |
|
|
|
+ SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE,
|
|
|
+ },
|
|
|
+ .capture = {
|
|
|
+ .stream_name = "Capture",
|
|
|
+ .channels_min = 2,
|
|
|
+ .channels_max = 4,
|
|
|
+ .rates = SNDRV_PCM_RATE_48000,
|
|
|
+ .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE |
|
|
|
+ SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE,
|
|
|
+ },
|
|
|
+ .ops = &ad1938_dai_ops,
|
|
|
+};
|
|
|
+EXPORT_SYMBOL_GPL(ad1938_dai);
|
|
|
+
|
|
|
+static int ad1938_register(struct ad1938_priv *ad1938)
|
|
|
+{
|
|
|
+ int ret;
|
|
|
+ struct snd_soc_codec *codec = &ad1938->codec;
|
|
|
+
|
|
|
+ if (ad1938_codec) {
|
|
|
+ dev_err(codec->dev, "Another ad1938 is registered\n");
|
|
|
+ return -EINVAL;
|
|
|
+ }
|
|
|
+
|
|
|
+ mutex_init(&codec->mutex);
|
|
|
+ INIT_LIST_HEAD(&codec->dapm_widgets);
|
|
|
+ INIT_LIST_HEAD(&codec->dapm_paths);
|
|
|
+ codec->private_data = ad1938;
|
|
|
+ codec->reg_cache = ad1938->reg_cache;
|
|
|
+ codec->reg_cache_size = AD1938_NUM_REGS;
|
|
|
+ codec->name = "AD1938";
|
|
|
+ codec->owner = THIS_MODULE;
|
|
|
+ codec->dai = &ad1938_dai;
|
|
|
+ codec->num_dai = 1;
|
|
|
+ codec->write = ad1938_write_reg;
|
|
|
+ codec->read = ad1938_read_reg_cache;
|
|
|
+ INIT_LIST_HEAD(&codec->dapm_widgets);
|
|
|
+ INIT_LIST_HEAD(&codec->dapm_paths);
|
|
|
+
|
|
|
+ ad1938_dai.dev = codec->dev;
|
|
|
+ ad1938_codec = codec;
|
|
|
+
|
|
|
+ /* default setting for ad1938 */
|
|
|
+ codec->write(codec, AD1938_DAC_CHNL_MUTE, 0x0); /* unmute dac channels */
|
|
|
+ codec->write(codec, AD1938_DAC_CTRL2, 0x1A); /* de-emphasis: 48kHz, powedown dac */
|
|
|
+ codec->write(codec, AD1938_DAC_CTRL0, 0x21); /* powerdown dac, dac tdm mode */
|
|
|
+ codec->write(codec, AD1938_ADC_CTRL0, 0x3); /* high-pass filter enable */
|
|
|
+ codec->write(codec, AD1938_ADC_CTRL1, 0x43); /* sata delay=1, adc aux mode */
|
|
|
+ codec->write(codec, AD1938_PLL_CLK_CTRL0, 0x9D); /* pll input:mclki/xi */
|
|
|
+ codec->write(codec, AD1938_PLL_CLK_CTRL1, 0x04);
|
|
|
+
|
|
|
+ ad1938_fill_cache(codec);
|
|
|
+
|
|
|
+ ret = snd_soc_register_codec(codec);
|
|
|
+ if (ret != 0) {
|
|
|
+ dev_err(codec->dev, "Failed to register codec: %d\n", ret);
|
|
|
+ return ret;
|
|
|
+ }
|
|
|
+
|
|
|
+ ret = snd_soc_register_dai(&ad1938_dai);
|
|
|
+ if (ret != 0) {
|
|
|
+ dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
|
|
|
+ snd_soc_unregister_codec(codec);
|
|
|
+ return ret;
|
|
|
+ }
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static void ad1938_unregister(struct ad1938_priv *ad1938)
|
|
|
+{
|
|
|
+ ad1938_set_bias_level(&ad1938->codec, SND_SOC_BIAS_OFF);
|
|
|
+ snd_soc_unregister_dai(&ad1938_dai);
|
|
|
+ snd_soc_unregister_codec(&ad1938->codec);
|
|
|
+ kfree(ad1938);
|
|
|
+ ad1938_codec = NULL;
|
|
|
+}
|
|
|
+
|
|
|
+static int ad1938_probe(struct platform_device *pdev)
|
|
|
+{
|
|
|
+ struct snd_soc_device *socdev = platform_get_drvdata(pdev);
|
|
|
+ struct snd_soc_codec *codec;
|
|
|
+ int ret = 0;
|
|
|
+
|
|
|
+ if (ad1938_codec == NULL) {
|
|
|
+ dev_err(&pdev->dev, "Codec device not registered\n");
|
|
|
+ return -ENODEV;
|
|
|
+ }
|
|
|
+
|
|
|
+ socdev->card->codec = ad1938_codec;
|
|
|
+ codec = ad1938_codec;
|
|
|
+
|
|
|
+ /* register pcms */
|
|
|
+ ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
|
|
|
+ if (ret < 0) {
|
|
|
+ dev_err(codec->dev, "failed to create pcms: %d\n", ret);
|
|
|
+ goto pcm_err;
|
|
|
+ }
|
|
|
+
|
|
|
+ snd_soc_add_controls(codec, ad1938_snd_controls,
|
|
|
+ ARRAY_SIZE(ad1938_snd_controls));
|
|
|
+ snd_soc_dapm_new_controls(codec, ad1938_dapm_widgets,
|
|
|
+ ARRAY_SIZE(ad1938_dapm_widgets));
|
|
|
+ snd_soc_dapm_add_routes(codec, audio_paths, ARRAY_SIZE(audio_paths));
|
|
|
+ snd_soc_dapm_new_widgets(codec);
|
|
|
+
|
|
|
+ ad1938_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
|
|
|
+
|
|
|
+ ret = snd_soc_init_card(socdev);
|
|
|
+ if (ret < 0) {
|
|
|
+ dev_err(codec->dev, "failed to register card: %d\n", ret);
|
|
|
+ goto card_err;
|
|
|
+ }
|
|
|
+
|
|
|
+ return ret;
|
|
|
+
|
|
|
+card_err:
|
|
|
+ snd_soc_free_pcms(socdev);
|
|
|
+ snd_soc_dapm_free(socdev);
|
|
|
+pcm_err:
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+
|
|
|
+/* power down chip */
|
|
|
+static int ad1938_remove(struct platform_device *pdev)
|
|
|
+{
|
|
|
+ struct snd_soc_device *socdev = platform_get_drvdata(pdev);
|
|
|
+
|
|
|
+ snd_soc_free_pcms(socdev);
|
|
|
+ snd_soc_dapm_free(socdev);
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+#ifdef CONFIG_PM
|
|
|
+static int ad1938_suspend(struct platform_device *pdev,
|
|
|
+ pm_message_t state)
|
|
|
+{
|
|
|
+ struct snd_soc_device *socdev = platform_get_drvdata(pdev);
|
|
|
+ struct snd_soc_codec *codec = socdev->card->codec;
|
|
|
+
|
|
|
+ ad1938_set_bias_level(codec, SND_SOC_BIAS_OFF);
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static int ad1938_resume(struct platform_device *pdev)
|
|
|
+{
|
|
|
+ struct snd_soc_device *socdev = platform_get_drvdata(pdev);
|
|
|
+ struct snd_soc_codec *codec = socdev->card->codec;
|
|
|
+
|
|
|
+ if (codec->suspend_bias_level == SND_SOC_BIAS_ON)
|
|
|
+ ad1938_set_bias_level(codec, SND_SOC_BIAS_ON);
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+#else
|
|
|
+#define ad1938_suspend NULL
|
|
|
+#define ad1938_resume NULL
|
|
|
+#endif
|
|
|
+
|
|
|
+struct snd_soc_codec_device soc_codec_dev_ad1938 = {
|
|
|
+ .probe = ad1938_probe,
|
|
|
+ .remove = ad1938_remove,
|
|
|
+ .suspend = ad1938_suspend,
|
|
|
+ .resume = ad1938_resume,
|
|
|
+};
|
|
|
+EXPORT_SYMBOL_GPL(soc_codec_dev_ad1938);
|
|
|
+
|
|
|
+static int __init ad1938_init(void)
|
|
|
+{
|
|
|
+ int ret;
|
|
|
+
|
|
|
+ ret = spi_register_driver(&ad1938_spi_driver);
|
|
|
+ if (ret != 0) {
|
|
|
+ printk(KERN_ERR "Failed to register ad1938 SPI driver: %d\n",
|
|
|
+ ret);
|
|
|
+ }
|
|
|
+
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+module_init(ad1938_init);
|
|
|
+
|
|
|
+static void __exit ad1938_exit(void)
|
|
|
+{
|
|
|
+ spi_unregister_driver(&ad1938_spi_driver);
|
|
|
+}
|
|
|
+module_exit(ad1938_exit);
|
|
|
+
|
|
|
+MODULE_DESCRIPTION("ASoC ad1938 driver");
|
|
|
+MODULE_AUTHOR("Barry Song ");
|
|
|
+MODULE_LICENSE("GPL");
|
Barry Song