ASoC sst v2: Add medfield machine driver

This patch adds the medfield machine driver
Machine driver glues the sn95031 codec driver and sst_platform driver to form the asoc sound driver

Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Harsha Priya <priya.harsha@intel.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

diff --git a/sound/soc/mid-x86/mfld_machine.c b/sound/soc/mid-x86/mfld_machine.c
new file mode 100644 (file)
index 0000000..1a330be
--- /dev/null
+++ b/sound/soc/mid-x86/mfld_machine.c
@@ -0,0 +1,296 @@
+/*
+ *  mfld_machine.c - ASoc Machine driver for Intel Medfield MID platform
+ *
+ *  Copyright (C) 2010 Intel Corp
+ *  Author: Vinod Koul <vinod.koul@intel.com>
+ *  Author: Harsha Priya <priya.harsha@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.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/slab.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include "../codecs/sn95031.h"
+
+#define MID_MONO 1
+#define MID_STEREO 2
+#define MID_MAX_CAP 5
+
+static unsigned int    hs_switch;
+static unsigned int    lo_dac;
+
+/* sound card controls */
+static const char *headset_switch_text[] = {"Earpiece", "Headset"};
+
+static const char *lo_text[] = {"Vibra", "Headset", "IHF", "None"};
+
+static const struct soc_enum headset_enum =
+       SOC_ENUM_SINGLE_EXT(2, headset_switch_text);
+
+static const struct soc_enum lo_enum =
+       SOC_ENUM_SINGLE_EXT(4, lo_text);
+
+static int headset_get_switch(struct snd_kcontrol *kcontrol,
+       struct snd_ctl_elem_value *ucontrol)
+{
+       ucontrol->value.integer.value[0] = hs_switch;
+       return 0;
+}
+
+static int headset_set_switch(struct snd_kcontrol *kcontrol,
+       struct snd_ctl_elem_value *ucontrol)
+{
+       struct snd_soc_codec *codec =  snd_kcontrol_chip(kcontrol);
+
+       if (ucontrol->value.integer.value[0] == hs_switch)
+               return 0;
+
+       if (ucontrol->value.integer.value[0]) {
+               pr_debug("hs_set HS path\n");
+               snd_soc_dapm_enable_pin(&codec->dapm, "HPOUTL");
+               snd_soc_dapm_enable_pin(&codec->dapm, "HPOUTR");
+               snd_soc_dapm_disable_pin(&codec->dapm, "EPOUT");
+       } else {
+               pr_debug("hs_set EP path\n");
+               snd_soc_dapm_disable_pin(&codec->dapm, "HPOUTL");
+               snd_soc_dapm_disable_pin(&codec->dapm, "HPOUTR");
+               snd_soc_dapm_enable_pin(&codec->dapm, "EPOUT");
+       }
+       snd_soc_dapm_sync(&codec->dapm);
+       hs_switch = ucontrol->value.integer.value[0];
+
+       return 0;
+}
+
+static void lo_enable_out_pins(struct snd_soc_codec *codec)
+{
+       snd_soc_dapm_enable_pin(&codec->dapm, "IHFOUTL");
+       snd_soc_dapm_enable_pin(&codec->dapm, "IHFOUTR");
+       snd_soc_dapm_enable_pin(&codec->dapm, "LINEOUTL");
+       snd_soc_dapm_enable_pin(&codec->dapm, "LINEOUTR");
+       snd_soc_dapm_enable_pin(&codec->dapm, "VIB1OUT");
+       snd_soc_dapm_enable_pin(&codec->dapm, "VIB2OUT");
+       if (hs_switch) {
+               snd_soc_dapm_enable_pin(&codec->dapm, "HPOUTL");
+               snd_soc_dapm_enable_pin(&codec->dapm, "HPOUTR");
+               snd_soc_dapm_disable_pin(&codec->dapm, "EPOUT");
+       } else {
+               snd_soc_dapm_disable_pin(&codec->dapm, "HPOUTL");
+               snd_soc_dapm_disable_pin(&codec->dapm, "HPOUTR");
+               snd_soc_dapm_enable_pin(&codec->dapm, "EPOUT");
+       }
+}
+
+static int lo_get_switch(struct snd_kcontrol *kcontrol,
+       struct snd_ctl_elem_value *ucontrol)
+{
+       ucontrol->value.integer.value[0] = lo_dac;
+       return 0;
+}
+
+static int lo_set_switch(struct snd_kcontrol *kcontrol,
+       struct snd_ctl_elem_value *ucontrol)
+{
+       struct snd_soc_codec *codec =  snd_kcontrol_chip(kcontrol);
+
+       if (ucontrol->value.integer.value[0] == lo_dac)
+               return 0;
+
+       /* we dont want to work with last state of lineout so just enable all
+        * pins and then disable pins not required
+        */
+       lo_enable_out_pins(codec);
+       switch (ucontrol->value.integer.value[0]) {
+       case 0:
+               pr_debug("set vibra path\n");
+               snd_soc_dapm_disable_pin(&codec->dapm, "VIB1OUT");
+               snd_soc_dapm_disable_pin(&codec->dapm, "VIB2OUT");
+               snd_soc_update_bits(codec, SN95031_LOCTL, 0x66, 0);
+               break;
+
+       case 1:
+               pr_debug("set hs  path\n");
+               snd_soc_dapm_disable_pin(&codec->dapm, "HPOUTL");
+               snd_soc_dapm_disable_pin(&codec->dapm, "HPOUTR");
+               snd_soc_dapm_disable_pin(&codec->dapm, "EPOUT");
+               snd_soc_update_bits(codec, SN95031_LOCTL, 0x66, 0x22);
+               break;
+
+       case 2:
+               pr_debug("set spkr path\n");
+               snd_soc_dapm_disable_pin(&codec->dapm, "IHFOUTL");
+               snd_soc_dapm_disable_pin(&codec->dapm, "IHFOUTR");
+               snd_soc_update_bits(codec, SN95031_LOCTL, 0x66, 0x44);
+               break;
+
+       case 3:
+               pr_debug("set null path\n");
+               snd_soc_dapm_disable_pin(&codec->dapm, "LINEOUTL");
+               snd_soc_dapm_disable_pin(&codec->dapm, "LINEOUTR");
+               snd_soc_update_bits(codec, SN95031_LOCTL, 0x66, 0x66);
+               break;
+       }
+       snd_soc_dapm_sync(&codec->dapm);
+       lo_dac = ucontrol->value.integer.value[0];
+       return 0;
+}
+
+static const struct snd_kcontrol_new mfld_snd_controls[] = {
+       SOC_ENUM_EXT("Playback Switch", headset_enum,
+                       headset_get_switch, headset_set_switch),
+       SOC_ENUM_EXT("Lineout Mux", lo_enum,
+                       lo_get_switch, lo_set_switch),
+};
+
+static int mfld_init(struct snd_soc_pcm_runtime *runtime)
+{
+       struct snd_soc_codec *codec = runtime->codec;
+       struct snd_soc_dapm_context *dapm = &codec->dapm;
+       int ret_val;
+
+       ret_val = snd_soc_add_controls(codec, mfld_snd_controls,
+                               ARRAY_SIZE(mfld_snd_controls));
+       if (ret_val) {
+               pr_err("soc_add_controls failed %d", ret_val);
+               return ret_val;
+       }
+       /* default is earpiece pin, userspace sets it explcitly */
+       snd_soc_dapm_disable_pin(dapm, "HPOUTL");
+       snd_soc_dapm_disable_pin(dapm, "HPOUTR");
+       /* default is lineout NC, userspace sets it explcitly */
+       snd_soc_dapm_disable_pin(dapm, "LINEOUTL");
+       snd_soc_dapm_disable_pin(dapm, "LINEOUTR");
+       lo_dac = 3;
+       hs_switch = 0;
+       return snd_soc_dapm_sync(dapm);
+}
+
+struct snd_soc_dai_link mfld_msic_dailink[] = {
+       {
+               .name = "Medfield Headset",
+               .stream_name = "Headset",
+               .cpu_dai_name = "Headset-cpu-dai",
+               .codec_dai_name = "SN95031 Headset",
+               .codec_name = "sn95031",
+               .platform_name = "sst-platform",
+               .init = mfld_init,
+       },
+       {
+               .name = "Medfield Speaker",
+               .stream_name = "Speaker",
+               .cpu_dai_name = "Speaker-cpu-dai",
+               .codec_dai_name = "SN95031 Speaker",
+               .codec_name = "sn95031",
+               .platform_name = "sst-platform",
+               .init = NULL,
+       },
+       {
+               .name = "Medfield Vibra",
+               .stream_name = "Vibra1",
+               .cpu_dai_name = "Vibra1-cpu-dai",
+               .codec_dai_name = "SN95031 Vibra1",
+               .codec_name = "sn95031",
+               .platform_name = "sst-platform",
+               .init = NULL,
+       },
+       {
+               .name = "Medfield Haptics",
+               .stream_name = "Vibra2",
+               .cpu_dai_name = "Vibra2-cpu-dai",
+               .codec_dai_name = "SN95031 Vibra2",
+               .codec_name = "sn95031",
+               .platform_name = "sst-platform",
+               .init = NULL,
+       },
+};
+
+/* SoC card */
+static struct snd_soc_card snd_soc_card_mfld = {
+       .name = "medfield_audio",
+       .dai_link = mfld_msic_dailink,
+       .num_links = ARRAY_SIZE(mfld_msic_dailink),
+};
+
+static int __devinit snd_mfld_mc_probe(struct platform_device *pdev)
+{
+       struct platform_device *socdev;
+       int ret_val = 0;
+
+       pr_debug("snd_mfld_mc_probe called\n");
+
+       socdev =  platform_device_alloc("soc-audio", -1);
+       if (!socdev) {
+               pr_err("soc-audio device allocation failed\n");
+               return -ENOMEM;
+       }
+       platform_set_drvdata(socdev, &snd_soc_card_mfld);
+       ret_val = platform_device_add(socdev);
+       if (ret_val) {
+               pr_err("Unable to add soc-audio device, err %d\n", ret_val);
+               platform_device_put(socdev);
+       }
+
+       platform_set_drvdata(pdev, socdev);
+
+       pr_debug("successfully exited probe\n");
+       return ret_val;
+}
+
+static int __devexit snd_mfld_mc_remove(struct platform_device *pdev)
+{
+       struct platform_device *socdev =  platform_get_drvdata(pdev);
+       pr_debug("snd_mfld_mc_remove called\n");
+
+       platform_device_unregister(socdev);
+       platform_set_drvdata(pdev, NULL);
+       return 0;
+}
+
+static struct platform_driver snd_mfld_mc_driver = {
+       .driver = {
+               .owner = THIS_MODULE,
+               .name = "msic_audio",
+       },
+       .probe = snd_mfld_mc_probe,
+       .remove = __devexit_p(snd_mfld_mc_remove),
+};
+
+static int __init snd_mfld_driver_init(void)
+{
+       pr_debug("snd_mfld_driver_init called\n");
+       return platform_driver_register(&snd_mfld_mc_driver);
+}
+module_init(snd_mfld_driver_init);
+
+static void __exit snd_mfld_driver_exit(void)
+{
+       pr_debug("snd_mfld_driver_exit called\n");
+       platform_driver_unregister(&snd_mfld_mc_driver);
+}
+module_exit(snd_mfld_driver_exit);
+
+MODULE_DESCRIPTION("ASoC Intel(R) MID Machine driver");
+MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
+MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:msic-audio");