CHROMIUM: ASoC: Import entire upstream ASoC tree

sound/soc/mid-x86/mfld_machine.c

+/*
+ *  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 <linux/io.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/jack.h>
+#include "../codecs/sn95031.h"
+
+#define MID_MONO 1
+#define MID_STEREO 2
+#define MID_MAX_CAP 5
+#define MFLD_JACK_INSERT 0x04
+
+enum soc_mic_bias_zones {
+        MFLD_MV_START = 0,
+        /* mic bias volutage range for Headphones*/
+        MFLD_MV_HP = 400,
+        /* mic bias volutage range for American Headset*/
+        MFLD_MV_AM_HS = 650,
+        /* mic bias volutage range for Headset*/
+        MFLD_MV_HS = 2000,
+        MFLD_MV_UNDEFINED,
+};
+
+static unsigned int     hs_switch;
+static unsigned int     lo_dac;
+
+struct mfld_mc_private {
+        struct platform_device *socdev;
+        void __iomem *int_base;
+        struct snd_soc_codec *codec;
+        u8 interrupt_status;
+};
+
+struct snd_soc_jack mfld_jack;
+
+/*Headset jack detection DAPM pins */
+static struct snd_soc_jack_pin mfld_jack_pins[] = {
+        {
+                .pin = "Headphones",
+                .mask = SND_JACK_HEADPHONE,
+        },
+        {
+                .pin = "AMIC1",
+                .mask = SND_JACK_MICROPHONE,
+        },
+};
+
+/* jack detection voltage zones */
+static struct snd_soc_jack_zone mfld_zones[] = {
+        {MFLD_MV_START, MFLD_MV_AM_HS, SND_JACK_HEADPHONE},
+        {MFLD_MV_AM_HS, MFLD_MV_HS, SND_JACK_HEADSET},
+};
+
+/* 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, "Headphones");
+                snd_soc_dapm_disable_pin(&codec->dapm, "EPOUT");
+        } else {
+                pr_debug("hs_set EP path\n");
+                snd_soc_dapm_disable_pin(&codec->dapm, "Headphones");
+                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, "Headphones");
+                snd_soc_dapm_disable_pin(&codec->dapm, "EPOUT");
+        } else {
+                snd_soc_dapm_disable_pin(&codec->dapm, "Headphones");
+                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, "Headphones");
+                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 const struct snd_soc_dapm_widget mfld_widgets[] = {
+        SND_SOC_DAPM_HP("Headphones", NULL),
+        SND_SOC_DAPM_MIC("Mic", NULL),
+};
+
+static const struct snd_soc_dapm_route mfld_map[] = {
+        {"Headphones", NULL, "HPOUTR"},
+        {"Headphones", NULL, "HPOUTL"},
+        {"Mic", NULL, "AMIC1"},
+};
+
+static void mfld_jack_check(unsigned int intr_status)
+{
+        struct mfld_jack_data jack_data;
+
+        jack_data.mfld_jack = &mfld_jack;
+        jack_data.intr_id = intr_status;
+
+        sn95031_jack_detection(&jack_data);
+        /* TODO: add american headset detection post gpiolib support */
+}
+
+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;
+
+        /* Add jack sense widgets */
+        snd_soc_dapm_new_controls(dapm, mfld_widgets, ARRAY_SIZE(mfld_widgets));
+
+        /* Set up the map */
+        snd_soc_dapm_add_routes(dapm, mfld_map, ARRAY_SIZE(mfld_map));
+
+        /* always connected */
+        snd_soc_dapm_enable_pin(dapm, "Headphones");
+        snd_soc_dapm_enable_pin(dapm, "Mic");
+        snd_soc_dapm_sync(dapm);
+
+        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, "Headphones");
+        /* 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;
+        /* we dont use linein in this so set to NC */
+        snd_soc_dapm_disable_pin(dapm, "LINEINL");
+        snd_soc_dapm_disable_pin(dapm, "LINEINR");
+        snd_soc_dapm_sync(dapm);
+
+        /* Headset and button jack detection */
+        ret_val = snd_soc_jack_new(codec, "Intel(R) MID Audio Jack",
+                        SND_JACK_HEADSET | SND_JACK_BTN_0 |
+                        SND_JACK_BTN_1, &mfld_jack);
+        if (ret_val) {
+                pr_err("jack creation failed\n");
+                return ret_val;
+        }
+
+        ret_val = snd_soc_jack_add_pins(&mfld_jack,
+                        ARRAY_SIZE(mfld_jack_pins), mfld_jack_pins);
+        if (ret_val) {
+                pr_err("adding jack pins failed\n");
+                return ret_val;
+        }
+        ret_val = snd_soc_jack_add_zones(&mfld_jack,
+                        ARRAY_SIZE(mfld_zones), mfld_zones);
+        if (ret_val) {
+                pr_err("adding jack zones failed\n");
+                return ret_val;
+        }
+
+        /* we want to check if anything is inserted at boot,
+         * so send a fake event to codec and it will read adc
+         * to find if anything is there or not */
+        mfld_jack_check(MFLD_JACK_INSERT);
+        return ret_val;
+}
+
+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 irqreturn_t snd_mfld_jack_intr_handler(int irq, void *dev)
+{
+        struct mfld_mc_private *mc_private = (struct mfld_mc_private *) dev;
+
+        memcpy_fromio(&mc_private->interrupt_status,
+                        ((void *)(mc_private->int_base)),
+                        sizeof(u8));
+        return IRQ_WAKE_THREAD;
+}
+
+static irqreturn_t snd_mfld_jack_detection(int irq, void *data)
+{
+        struct mfld_mc_private *mc_drv_ctx = (struct mfld_mc_private *) data;
+
+        if (mfld_jack.codec == NULL)
+                return IRQ_HANDLED;
+        mfld_jack_check(mc_drv_ctx->interrupt_status);
+
+        return IRQ_HANDLED;
+}
+
+static int __devinit snd_mfld_mc_probe(struct platform_device *pdev)
+{
+        int ret_val = 0, irq;
+        struct mfld_mc_private *mc_drv_ctx;
+        struct resource *irq_mem;
+
+        pr_debug("snd_mfld_mc_probe called\n");
+
+        /* retrive the irq number */
+        irq = platform_get_irq(pdev, 0);
+
+        /* audio interrupt base of SRAM location where
+         * interrupts are stored by System FW */
+        mc_drv_ctx = kzalloc(sizeof(*mc_drv_ctx), GFP_ATOMIC);
+        if (!mc_drv_ctx) {
+                pr_err("allocation failed\n");
+                return -ENOMEM;
+        }
+
+        irq_mem = platform_get_resource_byname(
+                                pdev, IORESOURCE_MEM, "IRQ_BASE");
+        if (!irq_mem) {
+                pr_err("no mem resource given\n");
+                ret_val = -ENODEV;
+                goto unalloc;
+        }
+        mc_drv_ctx->int_base = ioremap_nocache(irq_mem->start,
+                                        resource_size(irq_mem));
+        if (!mc_drv_ctx->int_base) {
+                pr_err("Mapping of cache failed\n");
+                ret_val = -ENOMEM;
+                goto unalloc;
+        }
+        /* register for interrupt */
+        ret_val = request_threaded_irq(irq, snd_mfld_jack_intr_handler,
+                        snd_mfld_jack_detection,
+                        IRQF_SHARED, pdev->dev.driver->name, mc_drv_ctx);
+        if (ret_val) {
+                pr_err("cannot register IRQ\n");
+                goto unalloc;
+        }
+        /* register the soc card */
+        snd_soc_card_mfld.dev = &pdev->dev;
+        ret_val = snd_soc_register_card(&snd_soc_card_mfld);
+        if (ret_val) {
+                pr_debug("snd_soc_register_card failed %d\n", ret_val);
+                goto freeirq;
+        }
+        platform_set_drvdata(pdev, mc_drv_ctx);
+        pr_debug("successfully exited probe\n");
+        return ret_val;
+
+freeirq:
+        free_irq(irq, mc_drv_ctx);
+unalloc:
+        kfree(mc_drv_ctx);
+        return ret_val;
+}
+
+static int __devexit snd_mfld_mc_remove(struct platform_device *pdev)
+{
+        struct mfld_mc_private *mc_drv_ctx = platform_get_drvdata(pdev);
+
+        pr_debug("snd_mfld_mc_remove called\n");
+        free_irq(platform_get_irq(pdev, 0), mc_drv_ctx);
+        snd_soc_unregister_card(&snd_soc_card_mfld);
+        kfree(mc_drv_ctx);
+        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");