[alsa-devel] [RFC 2/4] ASoC: Intel: Add merrifield machine driver
Vinod Koul
vinod.koul at intel.com
Mon May 5 20:01:46 CEST 2014
Signed-off-by: Vinod Koul <vinod.koul at intel.com>
---
sound/soc/intel/Kconfig | 17 +
sound/soc/intel/board/Makefile | 4 +
sound/soc/intel/board/merr_dpcm_wm8958.c | 619 ++++++++++++++++++++++++++++++
3 files changed, 640 insertions(+), 0 deletions(-)
create mode 100644 sound/soc/intel/board/Makefile
create mode 100644 sound/soc/intel/board/merr_dpcm_wm8958.c
diff --git a/sound/soc/intel/Kconfig b/sound/soc/intel/Kconfig
index 3c81b38..422c32d 100644
--- a/sound/soc/intel/Kconfig
+++ b/sound/soc/intel/Kconfig
@@ -49,3 +49,20 @@ config SND_SOC_INTEL_BYT_RT5640_MACH
help
This adds audio driver for Intel Baytrail platform based boards
with the RT5640 audio codec.
+
+config SND_SOC_INTEL_MRFLD_WM8958_MACH
+ tristate "SOC Machine Audio driver for Intel Merrifield MID platform"
+ depends on X86
+ select SND_SOC_WM8994
+ select MFD_CORE
+ select MFD_WM8994
+ select REGULATOR_WM8994
+ select SND_SST_MFLD_PLATFORM
+ select SND_SST_MACHINE
+ select SND_INTEL_SST
+ default n
+ help
+ This adds support for ASoC machine driver for Intel(R) MID Merrifield platform
+ used as alsa device in audio substem in Intel(R) MID devices
+ Say Y if you have such a device
+ If unsure select "N".
diff --git a/sound/soc/intel/board/Makefile b/sound/soc/intel/board/Makefile
new file mode 100644
index 0000000..fdfbecf
--- /dev/null
+++ b/sound/soc/intel/board/Makefile
@@ -0,0 +1,4 @@
+# Merrifield board
+snd-merr-dpcm-wm8958-objs := merr_dpcm_wm8958.o
+
+obj-$(CONFIG_SND_SOC_INTEL_MRFLD_WM8958_MACH) += snd-merr-dpcm-wm8958.o
diff --git a/sound/soc/intel/board/merr_dpcm_wm8958.c b/sound/soc/intel/board/merr_dpcm_wm8958.c
new file mode 100644
index 0000000..4c17746
--- /dev/null
+++ b/sound/soc/intel/board/merr_dpcm_wm8958.c
@@ -0,0 +1,619 @@
+/*
+ * merr_dpcm_wm8958.c - ASoc DPCM Machine driver for Intel Merrfield MID platform
+ *
+ * Copyright (C) 2013-14 Intel Corp
+ * Author: Vinod Koul <vinod.koul at intel.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; version 2 of the License.
+ *
+ * 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.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/slab.h>
+#include <linux/io.h>
+#include <linux/async.h>
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/jack.h>
+#include <linux/input.h>
+
+#include <linux/mfd/wm8994/core.h>
+#include <linux/mfd/wm8994/registers.h>
+#include <linux/mfd/wm8994/pdata.h>
+#include "../../codecs/wm8994.h"
+#include "../platform-libs/controls_v2.h"
+
+/* Codec PLL output clk rate */
+#define CODEC_SYSCLK_RATE 24576000
+/* Input clock to codec at MCLK1 PIN */
+#define CODEC_IN_MCLK1_RATE 19200000
+/* Input clock to codec at MCLK2 PIN */
+#define CODEC_IN_MCLK2_RATE 32768
+/* define to select between MCLK1 and MCLK2 input to codec as its clock */
+#define CODEC_IN_MCLK1 1
+#define CODEC_IN_MCLK2 2
+
+struct mrfld_8958_mc_private {
+ struct snd_soc_jack jack;
+ int jack_retry;
+};
+
+
+static inline struct snd_soc_codec *mrfld_8958_get_codec(struct snd_soc_card *card)
+{
+ bool found = false;
+ struct snd_soc_codec *codec;
+
+ list_for_each_entry(codec, &card->codec_dev_list, card_list) {
+ if (!strstr(codec->name, "wm8994-codec")) {
+ pr_debug("codec was %s", codec->name);
+ continue;
+ } else {
+ found = true;
+ break;
+ }
+ }
+ if (found == false) {
+ pr_warn("%s: cant find codec", __func__);
+ return NULL;
+ }
+ return codec;
+}
+
+/* TODO: find better way of doing this */
+static struct snd_soc_dai *find_codec_dai(struct snd_soc_card *card, const char *dai_name)
+{
+ int i;
+ for (i = 0; i < card->num_rtd; i++) {
+ if (!strcmp(card->rtd[i].codec_dai->name, dai_name))
+ return card->rtd[i].codec_dai;
+ }
+ pr_err("%s: unable to find codec dai\n", __func__);
+ /* this should never occur */
+ WARN_ON(1);
+ return NULL;
+}
+
+/* Function to switch the input clock for codec, When audio is in
+ * progress input clock to codec will be through MCLK1 which is 19.2MHz
+ * while in off state input clock to codec will be through 32KHz through
+ * MCLK2
+ * card : Sound card structure
+ * src : Input clock source to codec
+ */
+static int mrfld_8958_set_codec_clk(struct snd_soc_card *card, int src)
+{
+ struct snd_soc_dai *aif1_dai = find_codec_dai(card, "wm8994-aif1");
+ int ret;
+
+ if (!aif1_dai)
+ return -ENODEV;
+
+ switch (src) {
+ case CODEC_IN_MCLK1:
+ /* Turn ON the PLL to generate required sysclk rate
+ * from MCLK1 */
+ ret = snd_soc_dai_set_pll(aif1_dai,
+ WM8994_FLL1, WM8994_FLL_SRC_MCLK1,
+ CODEC_IN_MCLK1_RATE, CODEC_SYSCLK_RATE);
+ if (ret < 0) {
+ pr_err("Failed to start FLL: %d\n", ret);
+ return ret;
+ }
+ /* Switch to MCLK1 input */
+ ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_FLL1,
+ CODEC_SYSCLK_RATE, SND_SOC_CLOCK_IN);
+ if (ret < 0) {
+ pr_err("Failed to set codec sysclk configuration %d\n",
+ ret);
+ return ret;
+ }
+ break;
+ case CODEC_IN_MCLK2:
+ /* Switch to MCLK2 */
+ ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_MCLK2,
+ 32768, SND_SOC_CLOCK_IN);
+ if (ret < 0) {
+ pr_err("Failed to switch to MCLK2: %d", ret);
+ return ret;
+ }
+ /* Turn off PLL for MCLK1 */
+ ret = snd_soc_dai_set_pll(aif1_dai, WM8994_FLL1, 0, 0, 0);
+ if (ret < 0) {
+ pr_err("Failed to stop the FLL: %d", ret);
+ return ret;
+ }
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int mrfld_wm8958_set_clk_fmt(struct snd_soc_dai *codec_dai)
+{
+ unsigned int fmt;
+ int ret = 0;
+ struct snd_soc_card *card = codec_dai->card;
+
+ pr_err("setting snd_soc_dai_set_tdm_slot\n");
+ ret = snd_soc_dai_set_tdm_slot(codec_dai, 0, 0, 4, SNDRV_PCM_FORMAT_S24_LE);
+ if (ret < 0) {
+ pr_err("can't set codec pcm format %d\n", ret);
+ return ret;
+ }
+
+ /* WM8958 slave Mode */
+ fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_IB_NF
+ | SND_SOC_DAIFMT_CBS_CFS;
+ ret = snd_soc_dai_set_fmt(codec_dai, fmt);
+ if (ret < 0) {
+ pr_err("can't set codec DAI configuration %d\n", ret);
+ return ret;
+ }
+
+ /* FIXME: move this to SYS_CLOCK event handler when codec driver
+ * dependency is clean.
+ */
+ /* Switch to 19.2MHz MCLK1 input clock for codec */
+ ret = mrfld_8958_set_codec_clk(card, CODEC_IN_MCLK1);
+
+ return ret;
+}
+
+static int mrfld_8958_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;
+
+ if (!strcmp(codec_dai->name, "wm8994-aif1"))
+ return mrfld_wm8958_set_clk_fmt(codec_dai);
+ return 0;
+}
+
+static int mrfld_wm8958_compr_set_params(struct snd_compr_stream *cstream)
+{
+ return 0;
+}
+
+static const struct snd_soc_pcm_stream mrfld_wm8958_dai_params = {
+ .formats = SNDRV_PCM_FMTBIT_S24_LE,
+ .rate_min = 48000,
+ .rate_max = 48000,
+ .channels_min = 2,
+ .channels_max = 2,
+};
+
+static int merr_codec_fixup(struct snd_soc_pcm_runtime *rtd,
+ struct snd_pcm_hw_params *params)
+{
+ struct snd_interval *rate = hw_param_interval(params,
+ SNDRV_PCM_HW_PARAM_RATE);
+ struct snd_interval *channels = hw_param_interval(params,
+ SNDRV_PCM_HW_PARAM_CHANNELS);
+
+ pr_debug("Invoked %s for dailink %s\n", __func__, rtd->dai_link->name);
+
+ /* The DSP will covert the FE rate to 48k, stereo, 24bits */
+ rate->min = rate->max = 48000;
+ channels->min = channels->max = 2;
+
+ /* set SSP2 to 24-bit */
+ snd_mask_set(¶ms->masks[SNDRV_PCM_HW_PARAM_FORMAT -
+ SNDRV_PCM_HW_PARAM_FIRST_MASK],
+ SNDRV_PCM_FORMAT_S24_LE);
+ return 0;
+}
+
+static int mrfld_8958_set_bias_level(struct snd_soc_card *card,
+ struct snd_soc_dapm_context *dapm,
+ enum snd_soc_bias_level level)
+{
+ struct snd_soc_dai *aif1_dai = find_codec_dai(card, "wm8994-aif1");
+ int ret = 0;
+
+ if (!aif1_dai)
+ return -ENODEV;
+
+ if (dapm->dev != aif1_dai->dev)
+ return 0;
+ switch (level) {
+ case SND_SOC_BIAS_PREPARE:
+ if (card->dapm.bias_level == SND_SOC_BIAS_STANDBY)
+
+ ret = mrfld_wm8958_set_clk_fmt(aif1_dai);
+ break;
+ default:
+ break;
+ }
+ pr_debug("%s card(%s)->bias_level %u\n", __func__, card->name,
+ card->dapm.bias_level);
+ return ret;
+}
+
+static int mrfld_8958_set_bias_level_post(struct snd_soc_card *card,
+ struct snd_soc_dapm_context *dapm,
+ enum snd_soc_bias_level level)
+{
+ struct snd_soc_dai *aif1_dai = find_codec_dai(card, "wm8994-aif1");
+ int ret = 0;
+
+ if (!aif1_dai)
+ return -ENODEV;
+
+ if (dapm->dev != aif1_dai->dev)
+ return 0;
+
+ switch (level) {
+ case SND_SOC_BIAS_STANDBY:
+ /* We are in stabdba down so */
+ /* Switch to 32KHz MCLK2 input clock for codec
+ */
+ ret = mrfld_8958_set_codec_clk(card, CODEC_IN_MCLK2);
+ break;
+ default:
+ break;
+ }
+ card->dapm.bias_level = level;
+ pr_debug("%s card(%s)->bias_level %u\n", __func__, card->name,
+ card->dapm.bias_level);
+ return ret;
+}
+
+static const struct snd_soc_dapm_widget widgets[] = {
+ SND_SOC_DAPM_HP("Headphones", NULL),
+ SND_SOC_DAPM_MIC("AMIC", NULL),
+ SND_SOC_DAPM_MIC("DMIC", NULL),
+};
+
+static const struct snd_soc_dapm_route map[] = {
+ { "Headphones", NULL, "HPOUT1L" },
+ { "Headphones", NULL, "HPOUT1R" },
+
+ /* saltbay uses 2 DMICs, other configs may use more so change below
+ * accordingly
+ */
+ { "DMIC1DAT", NULL, "DMIC" },
+ { "DMIC2DAT", NULL, "DMIC" },
+ /*{ "DMIC3DAT", NULL, "DMIC" },*/
+ /*{ "DMIC4DAT", NULL, "DMIC" },*/
+
+ /* MICBIAS2 is connected as Bias for AMIC so we link it
+ * here. Also AMIC wires up to IN1LP pin.
+ * DMIC is externally connected to 1.8V rail, so no link rqd.
+ */
+ { "AMIC", NULL, "MICBIAS2" },
+ { "IN1LP", NULL, "AMIC" },
+
+ /* SWM map link the SWM outs to codec AIF */
+ { "AIF1 Playback", NULL, "ssp2 Tx"},
+ { "ssp2 Tx", NULL, "codec_out0"},
+ { "ssp2 Tx", NULL, "codec_out1"},
+ { "codec_in0", NULL, "ssp2 Rx" },
+ { "codec_in1", NULL, "ssp2 Rx" },
+ { "ssp2 Rx", NULL, "AIF1 Capture"},
+
+};
+
+static const struct wm8958_micd_rate micdet_rates[] = {
+ { 32768, true, 1, 4 },
+ { 32768, false, 1, 1 },
+ { 44100 * 256, true, 7, 10 },
+ { 44100 * 256, false, 7, 10 },
+};
+
+static int mrfld_8958_init(struct snd_soc_pcm_runtime *runtime)
+{
+ int ret;
+ unsigned int fmt;
+ struct snd_soc_codec *codec;
+ struct snd_soc_card *card = runtime->card;
+ struct snd_soc_dai *aif1_dai = find_codec_dai(card, "wm8994-aif1");
+ struct mrfld_8958_mc_private *ctx = snd_soc_card_get_drvdata(card);
+
+ if (!aif1_dai)
+ return -ENODEV;
+
+ pr_debug("Entry %s\n", __func__);
+
+ ret = snd_soc_dai_set_tdm_slot(aif1_dai, 0, 0, 4, SNDRV_PCM_FORMAT_S24_LE);
+ if (ret < 0) {
+ pr_err("can't set codec pcm format %d\n", ret);
+ return ret;
+ }
+
+ /* WM8958 slave Mode */
+ fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_IB_NF
+ | SND_SOC_DAIFMT_CBS_CFS;
+ ret = snd_soc_dai_set_fmt(aif1_dai, fmt);
+ if (ret < 0) {
+ pr_err("can't set codec DAI configuration %d\n", ret);
+ return ret;
+ }
+
+ mrfld_8958_set_bias_level(card, &card->dapm, SND_SOC_BIAS_OFF);
+ card->dapm.idle_bias_off = true;
+
+ /* these pins are not used in SB config so mark as nc
+ *
+ * LINEOUT1, 2
+ * IN1R
+ * DMICDAT2
+ */
+ snd_soc_dapm_nc_pin(&card->dapm, "DMIC2DAT");
+ snd_soc_dapm_nc_pin(&card->dapm, "LINEOUT1P");
+ snd_soc_dapm_nc_pin(&card->dapm, "LINEOUT1N");
+ snd_soc_dapm_nc_pin(&card->dapm, "LINEOUT2P");
+ snd_soc_dapm_nc_pin(&card->dapm, "LINEOUT2N");
+ snd_soc_dapm_nc_pin(&card->dapm, "IN1RN");
+ snd_soc_dapm_nc_pin(&card->dapm, "IN1RP");
+
+ /* Force enable VMID to avoid cold latency constraints */
+ snd_soc_dapm_force_enable_pin(&card->dapm, "VMID");
+ snd_soc_dapm_sync(&card->dapm);
+
+ codec = mrfld_8958_get_codec(card);
+ if (!codec) {
+ pr_err("%s: we didnt find the codec pointer!\n", __func__);
+ return 0;
+ }
+
+ ctx->jack_retry = 0;
+ ret = snd_soc_jack_new(codec, "Intel MID Audio Jack",
+ SND_JACK_HEADSET | SND_JACK_HEADPHONE |
+ SND_JACK_BTN_0 | SND_JACK_BTN_1,
+ &ctx->jack);
+ if (ret) {
+ pr_err("jack creation failed\n");
+ return ret;
+ }
+
+ snd_jack_set_key(ctx->jack.jack, SND_JACK_BTN_1, KEY_MEDIA);
+ snd_jack_set_key(ctx->jack.jack, SND_JACK_BTN_0, KEY_MEDIA);
+
+ wm8958_mic_detect(codec, &ctx->jack, NULL, NULL, NULL, NULL);
+
+ snd_soc_update_bits(codec, WM8994_AIF1_DAC1_FILTERS_1, WM8994_AIF1DAC1_MUTE, 0);
+ snd_soc_update_bits(codec, WM8994_AIF1_DAC2_FILTERS_1, WM8994_AIF1DAC2_MUTE, 0);
+
+ /* Micbias1 is always off, so for pm optimizations make sure the micbias1
+ * discharge bit is set to floating to avoid discharge in disable state
+ */
+ snd_soc_update_bits(codec, WM8958_MICBIAS1, WM8958_MICB1_DISCH, 0);
+
+ return 0;
+}
+
+static unsigned int rates_48000[] = {
+ 48000,
+};
+
+static struct snd_pcm_hw_constraint_list constraints_48000 = {
+ .count = ARRAY_SIZE(rates_48000),
+ .list = rates_48000,
+};
+static int mrfld_8958_startup(struct snd_pcm_substream *substream)
+{
+ return snd_pcm_hw_constraint_list(substream->runtime, 0,
+ SNDRV_PCM_HW_PARAM_RATE,
+ &constraints_48000);
+}
+
+static struct snd_soc_ops mrfld_8958_ops = {
+ .startup = mrfld_8958_startup,
+};
+
+static struct snd_soc_ops mrfld_8958_be_ssp2_ops = {
+ .hw_params = mrfld_8958_hw_params,
+};
+static struct snd_soc_compr_ops mrfld_compr_ops = {
+ .set_params = mrfld_wm8958_compr_set_params,
+};
+
+struct snd_soc_dai_link mrfld_8958_msic_dailink[] = {
+ [MERR_DPCM_AUDIO] = {
+ .name = "Merrifield Audio Port",
+ .stream_name = "Saltbay Audio",
+ .cpu_dai_name = "Headset-cpu-dai",
+ .codec_name = "snd-soc-dummy",
+ .codec_dai_name = "snd-soc-dummy-dai",
+ .platform_name = "sst-platform",
+ .init = mrfld_8958_init,
+ .ignore_suspend = 1,
+ .dynamic = 1,
+ .ops = &mrfld_8958_ops,
+ },
+ [MERR_DPCM_COMPR] = {
+ .name = "Merrifield Compress Port",
+ .stream_name = "Saltbay Compress",
+ .platform_name = "sst-platform",
+ .cpu_dai_name = "Compress-cpu-dai",
+ .codec_name = "snd-soc-dummy",
+ .codec_dai_name = "snd-soc-dummy-dai",
+ .dynamic = 1,
+ .init = mrfld_8958_init,
+ .compr_ops = &mrfld_compr_ops,
+ },
+
+ /* back ends */
+ {
+ .name = "SSP2-Codec",
+ .be_id = 1,
+ .cpu_dai_name = "ssp2-port",
+ .platform_name = "sst-platform",
+ .no_pcm = 1,
+ .codec_dai_name = "wm8994-aif1",
+ .codec_name = "wm8994-codec",
+ .be_hw_params_fixup = merr_codec_fixup,
+ .ignore_suspend = 1,
+ .ops = &mrfld_8958_be_ssp2_ops,
+ },
+};
+
+#ifdef CONFIG_PM_SLEEP
+static int snd_mrfld_8958_prepare(struct device *dev)
+{
+ struct snd_soc_card *card = dev_get_drvdata(dev);
+ struct snd_soc_codec *codec;
+ struct snd_soc_dapm_context *dapm;
+
+ pr_debug("In %s\n", __func__);
+
+ codec = mrfld_8958_get_codec(card);
+ if (!codec) {
+ pr_err("%s: couldn't find the codec pointer!\n", __func__);
+ return -EAGAIN;
+ }
+
+ pr_debug("found codec %s\n", codec->name);
+ dapm = &codec->dapm;
+
+ snd_soc_dapm_disable_pin(dapm, "VMID");
+ snd_soc_dapm_sync(dapm);
+
+ snd_soc_suspend(dev);
+ return 0;
+}
+
+static void snd_mrfld_8958_complete(struct device *dev)
+{
+ struct snd_soc_card *card = dev_get_drvdata(dev);
+ struct snd_soc_codec *codec;
+ struct snd_soc_dapm_context *dapm;
+
+ pr_debug("In %s\n", __func__);
+
+ codec = mrfld_8958_get_codec(card);
+ if (!codec) {
+ pr_err("%s: couldn't find the codec pointer!\n", __func__);
+ return;
+ }
+
+ pr_debug("found codec %s\n", codec->name);
+ dapm = &codec->dapm;
+
+ snd_soc_dapm_force_enable_pin(dapm, "VMID");
+ snd_soc_dapm_sync(dapm);
+
+ snd_soc_resume(dev);
+ return;
+}
+
+static int snd_mrfld_8958_poweroff(struct device *dev)
+{
+ pr_debug("In %s\n", __func__);
+ snd_soc_poweroff(dev);
+ return 0;
+}
+#else
+#define snd_mrfld_8958_prepare NULL
+#define snd_mrfld_8958_complete NULL
+#define snd_mrfld_8958_poweroff NULL
+#endif
+
+/* SoC card */
+static struct snd_soc_card snd_soc_card_mrfld = {
+ .name = "wm8958-audio",
+ .dai_link = mrfld_8958_msic_dailink,
+ .num_links = ARRAY_SIZE(mrfld_8958_msic_dailink),
+ .set_bias_level = mrfld_8958_set_bias_level,
+ .set_bias_level_post = mrfld_8958_set_bias_level_post,
+ .dapm_widgets = widgets,
+ .num_dapm_widgets = ARRAY_SIZE(widgets),
+ .dapm_routes = map,
+ .num_dapm_routes = ARRAY_SIZE(map),
+};
+
+static int snd_mrfld_8958_mc_probe(struct platform_device *pdev)
+{
+ int ret_val = 0;
+ struct mrfld_8958_mc_private *drv;
+
+ pr_debug("Entry %s\n", __func__);
+
+ drv = kzalloc(sizeof(*drv), GFP_ATOMIC);
+ if (!drv) {
+ pr_err("allocation failed\n");
+ return -ENOMEM;
+ }
+
+ /* register the soc card */
+ snd_soc_card_mrfld.dev = &pdev->dev;
+ snd_soc_card_set_drvdata(&snd_soc_card_mrfld, drv);
+ ret_val = snd_soc_register_card(&snd_soc_card_mrfld);
+ if (ret_val) {
+ pr_err("snd_soc_register_card failed %d\n", ret_val);
+ goto unalloc;
+ }
+ platform_set_drvdata(pdev, &snd_soc_card_mrfld);
+ pr_info("%s successful\n", __func__);
+ return ret_val;
+
+unalloc:
+ kfree(drv);
+ return ret_val;
+}
+
+static int snd_mrfld_8958_mc_remove(struct platform_device *pdev)
+{
+ struct snd_soc_card *soc_card = platform_get_drvdata(pdev);
+ struct mrfld_8958_mc_private *drv = snd_soc_card_get_drvdata(soc_card);
+
+ pr_debug("In %s\n", __func__);
+ kfree(drv);
+ snd_soc_card_set_drvdata(soc_card, NULL);
+ snd_soc_unregister_card(soc_card);
+ platform_set_drvdata(pdev, NULL);
+ return 0;
+}
+
+const struct dev_pm_ops snd_mrfld_8958_mc_pm_ops = {
+ .prepare = snd_mrfld_8958_prepare,
+ .complete = snd_mrfld_8958_complete,
+ .poweroff = snd_mrfld_8958_poweroff,
+};
+
+static struct platform_driver snd_mrfld_8958_mc_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "mrfld_wm8958",
+ .pm = &snd_mrfld_8958_mc_pm_ops,
+ },
+ .probe = snd_mrfld_8958_mc_probe,
+ .remove = snd_mrfld_8958_mc_remove,
+};
+
+static int snd_mrfld_8958_driver_init(void)
+{
+ pr_info("Merrifield Machine Driver mrfld_wm8958 registerd\n");
+ return platform_driver_register(&snd_mrfld_8958_mc_driver);
+}
+
+static void snd_mrfld_8958_driver_exit(void)
+{
+ pr_debug("In %s\n", __func__);
+ platform_driver_unregister(&snd_mrfld_8958_mc_driver);
+}
+late_initcall(snd_mrfld_8958_driver_init);
+module_exit(snd_mrfld_8958_driver_exit);
+
+MODULE_DESCRIPTION("ASoC Intel(R) Merrifield MID Machine driver");
+MODULE_AUTHOR("Vinod Koul <vinod.koul at linux.intel.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:mrfld_wm8958");
--
1.7.0.4
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