diff options
Diffstat (limited to 'sound/soc/omap/ams-delta.c')
| -rw-r--r-- | sound/soc/omap/ams-delta.c | 646 |
1 files changed, 646 insertions, 0 deletions
diff --git a/sound/soc/omap/ams-delta.c b/sound/soc/omap/ams-delta.c new file mode 100644 index 00000000000..5a5166ac727 --- /dev/null +++ b/sound/soc/omap/ams-delta.c @@ -0,0 +1,646 @@ +/* + * ams-delta.c -- SoC audio for Amstrad E3 (Delta) videophone + * + * Copyright (C) 2009 Janusz Krzysztofik <jkrzyszt@tis.icnet.pl> + * + * Initially based on sound/soc/omap/osk5912.x + * Copyright (C) 2008 Mistral Solutions + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * 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., 51 Franklin St, Fifth Floor, Boston, MA + * 02110-1301 USA + * + */ + +#include <linux/gpio.h> +#include <linux/spinlock.h> +#include <linux/tty.h> + +#include <sound/soc-dapm.h> +#include <sound/jack.h> + +#include <asm/mach-types.h> + +#include <mach/board-ams-delta.h> +#include <mach/mcbsp.h> + +#include "omap-mcbsp.h" +#include "omap-pcm.h" +#include "../codecs/cx20442.h" + + +/* Board specific DAPM widgets */ + const struct snd_soc_dapm_widget ams_delta_dapm_widgets[] = { + /* Handset */ + SND_SOC_DAPM_MIC("Mouthpiece", NULL), + SND_SOC_DAPM_HP("Earpiece", NULL), + /* Handsfree/Speakerphone */ + SND_SOC_DAPM_MIC("Microphone", NULL), + SND_SOC_DAPM_SPK("Speaker", NULL), +}; + +/* How they are connected to codec pins */ +static const struct snd_soc_dapm_route ams_delta_audio_map[] = { + {"TELIN", NULL, "Mouthpiece"}, + {"Earpiece", NULL, "TELOUT"}, + + {"MIC", NULL, "Microphone"}, + {"Speaker", NULL, "SPKOUT"}, +}; + +/* + * Controls, functional after the modem line discipline is activated. + */ + +/* Virtual switch: audio input/output constellations */ +static const char *ams_delta_audio_mode[] = + {"Mixed", "Handset", "Handsfree", "Speakerphone"}; + +/* Selection <-> pin translation */ +#define AMS_DELTA_MOUTHPIECE 0 +#define AMS_DELTA_EARPIECE 1 +#define AMS_DELTA_MICROPHONE 2 +#define AMS_DELTA_SPEAKER 3 +#define AMS_DELTA_AGC 4 + +#define AMS_DELTA_MIXED ((1 << AMS_DELTA_EARPIECE) | \ + (1 << AMS_DELTA_MICROPHONE)) +#define AMS_DELTA_HANDSET ((1 << AMS_DELTA_MOUTHPIECE) | \ + (1 << AMS_DELTA_EARPIECE)) +#define AMS_DELTA_HANDSFREE ((1 << AMS_DELTA_MICROPHONE) | \ + (1 << AMS_DELTA_SPEAKER)) +#define AMS_DELTA_SPEAKERPHONE (AMS_DELTA_HANDSFREE | (1 << AMS_DELTA_AGC)) + +unsigned short ams_delta_audio_mode_pins[] = { + AMS_DELTA_MIXED, + AMS_DELTA_HANDSET, + AMS_DELTA_HANDSFREE, + AMS_DELTA_SPEAKERPHONE, +}; + +static unsigned short ams_delta_audio_agc; + +static int ams_delta_set_audio_mode(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); + struct soc_enum *control = (struct soc_enum *)kcontrol->private_value; + unsigned short pins; + int pin, changed = 0; + + /* Refuse any mode changes if we are not able to control the codec. */ + if (!codec->control_data) + return -EUNATCH; + + if (ucontrol->value.enumerated.item[0] >= control->max) + return -EINVAL; + + mutex_lock(&codec->mutex); + + /* Translate selection to bitmap */ + pins = ams_delta_audio_mode_pins[ucontrol->value.enumerated.item[0]]; + + /* Setup pins after corresponding bits if changed */ + pin = !!(pins & (1 << AMS_DELTA_MOUTHPIECE)); + if (pin != snd_soc_dapm_get_pin_status(codec, "Mouthpiece")) { + changed = 1; + if (pin) + snd_soc_dapm_enable_pin(codec, "Mouthpiece"); + else + snd_soc_dapm_disable_pin(codec, "Mouthpiece"); + } + pin = !!(pins & (1 << AMS_DELTA_EARPIECE)); + if (pin != snd_soc_dapm_get_pin_status(codec, "Earpiece")) { + changed = 1; + if (pin) + snd_soc_dapm_enable_pin(codec, "Earpiece"); + else + snd_soc_dapm_disable_pin(codec, "Earpiece"); + } + pin = !!(pins & (1 << AMS_DELTA_MICROPHONE)); + if (pin != snd_soc_dapm_get_pin_status(codec, "Microphone")) { + changed = 1; + if (pin) + snd_soc_dapm_enable_pin(codec, "Microphone"); + else + snd_soc_dapm_disable_pin(codec, "Microphone"); + } + pin = !!(pins & (1 << AMS_DELTA_SPEAKER)); + if (pin != snd_soc_dapm_get_pin_status(codec, "Speaker")) { + changed = 1; + if (pin) + snd_soc_dapm_enable_pin(codec, "Speaker"); + else + snd_soc_dapm_disable_pin(codec, "Speaker"); + } + pin = !!(pins & (1 << AMS_DELTA_AGC)); + if (pin != ams_delta_audio_agc) { + ams_delta_audio_agc = pin; + changed = 1; + if (pin) + snd_soc_dapm_enable_pin(codec, "AGCIN"); + else + snd_soc_dapm_disable_pin(codec, "AGCIN"); + } + if (changed) + snd_soc_dapm_sync(codec); + + mutex_unlock(&codec->mutex); + + return changed; +} + +static int ams_delta_get_audio_mode(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); + unsigned short pins, mode; + + pins = ((snd_soc_dapm_get_pin_status(codec, "Mouthpiece") << + AMS_DELTA_MOUTHPIECE) | + (snd_soc_dapm_get_pin_status(codec, "Earpiece") << + AMS_DELTA_EARPIECE)); + if (pins) + pins |= (snd_soc_dapm_get_pin_status(codec, "Microphone") << + AMS_DELTA_MICROPHONE); + else + pins = ((snd_soc_dapm_get_pin_status(codec, "Microphone") << + AMS_DELTA_MICROPHONE) | + (snd_soc_dapm_get_pin_status(codec, "Speaker") << + AMS_DELTA_SPEAKER) | + (ams_delta_audio_agc << AMS_DELTA_AGC)); + + for (mode = 0; mode < ARRAY_SIZE(ams_delta_audio_mode); mode++) + if (pins == ams_delta_audio_mode_pins[mode]) + break; + + if (mode >= ARRAY_SIZE(ams_delta_audio_mode)) + return -EINVAL; + + ucontrol->value.enumerated.item[0] = mode; + + return 0; +} + +static const struct soc_enum ams_delta_audio_enum[] = { + SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(ams_delta_audio_mode), + ams_delta_audio_mode), +}; + +static const struct snd_kcontrol_new ams_delta_audio_controls[] = { + SOC_ENUM_EXT("Audio Mode", ams_delta_audio_enum[0], + ams_delta_get_audio_mode, ams_delta_set_audio_mode), +}; + +/* Hook switch */ +static struct snd_soc_jack ams_delta_hook_switch; +static struct snd_soc_jack_gpio ams_delta_hook_switch_gpios[] = { + { + .gpio = 4, + .name = "hook_switch", + .report = SND_JACK_HEADSET, + .invert = 1, + .debounce_time = 150, + } +}; + +/* After we are able to control the codec over the modem, + * the hook switch can be used for dynamic DAPM reconfiguration. */ +static struct snd_soc_jack_pin ams_delta_hook_switch_pins[] = { + /* Handset */ + { + .pin = "Mouthpiece", + .mask = SND_JACK_MICROPHONE, + }, + { + .pin = "Earpiece", + .mask = SND_JACK_HEADPHONE, + }, + /* Handsfree */ + { + .pin = "Microphone", + .mask = SND_JACK_MICROPHONE, + .invert = 1, + }, + { + .pin = "Speaker", + .mask = SND_JACK_HEADPHONE, + .invert = 1, + }, +}; + + +/* + * Modem line discipline, required for making above controls functional. + * Activated from userspace with ldattach, possibly invoked from udev rule. + */ + +/* To actually apply any modem controlled configuration changes to the codec, + * we must connect codec DAI pins to the modem for a moment. Be carefull not + * to interfere with our digital mute function that shares the same hardware. */ +static struct timer_list cx81801_timer; +static bool cx81801_cmd_pending; +static bool ams_delta_muted; +static DEFINE_SPINLOCK(ams_delta_lock); + +static void cx81801_timeout(unsigned long data) +{ + int muted; + + spin_lock(&ams_delta_lock); + cx81801_cmd_pending = 0; + muted = ams_delta_muted; + spin_unlock(&ams_delta_lock); + + /* Reconnect the codec DAI back from the modem to the CPU DAI + * only if digital mute still off */ + if (!muted) + ams_delta_latch2_write(AMS_DELTA_LATCH2_MODEM_CODEC, 0); +} + +/* Line discipline .open() */ +static int cx81801_open(struct tty_struct *tty) +{ + return v253_ops.open(tty); +} + +/* Line discipline .close() */ +static void cx81801_close(struct tty_struct *tty) +{ + struct snd_soc_codec *codec = tty->disc_data; + + del_timer_sync(&cx81801_timer); + + v253_ops.close(tty); + + /* Prevent the hook switch from further changing the DAPM pins */ + INIT_LIST_HEAD(&ams_delta_hook_switch.pins); + + /* Revert back to default audio input/output constellation */ + snd_soc_dapm_disable_pin(codec, "Mouthpiece"); + snd_soc_dapm_enable_pin(codec, "Earpiece"); + snd_soc_dapm_enable_pin(codec, "Microphone"); + snd_soc_dapm_disable_pin(codec, "Speaker"); + snd_soc_dapm_disable_pin(codec, "AGCIN"); + snd_soc_dapm_sync(codec); +} + +/* Line discipline .hangup() */ +static int cx81801_hangup(struct tty_struct *tty) +{ + cx81801_close(tty); + return 0; +} + +/* Line discipline .recieve_buf() */ +static void cx81801_receive(struct tty_struct *tty, + const unsigned char *cp, char *fp, int count) +{ + struct snd_soc_codec *codec = tty->disc_data; + const unsigned char *c; + int apply, ret; + + if (!codec->control_data) { + /* First modem response, complete setup procedure */ + + /* Initialize timer used for config pulse generation */ + setup_timer(&cx81801_timer, cx81801_timeout, 0); + + v253_ops.receive_buf(tty, cp, fp, count); + + /* Link hook switch to DAPM pins */ + ret = snd_soc_jack_add_pins(&ams_delta_hook_switch, + ARRAY_SIZE(ams_delta_hook_switch_pins), + ams_delta_hook_switch_pins); + if (ret) + dev_warn(codec->socdev->card->dev, + "Failed to link hook switch to DAPM pins, " + "will continue with hook switch unlinked.\n"); + + return; + } + + v253_ops.receive_buf(tty, cp, fp, count); + + for (c = &cp[count - 1]; c >= cp; c--) { + if (*c != '\r') + continue; + /* Complete modem response received, apply config to codec */ + + spin_lock_bh(&ams_delta_lock); + mod_timer(&cx81801_timer, jiffies + msecs_to_jiffies(150)); + apply = !ams_delta_muted && !cx81801_cmd_pending; + cx81801_cmd_pending = 1; + spin_unlock_bh(&ams_delta_lock); + + /* Apply config pulse by connecting the codec to the modem + * if not already done */ + if (apply) + ams_delta_latch2_write(AMS_DELTA_LATCH2_MODEM_CODEC, + AMS_DELTA_LATCH2_MODEM_CODEC); + break; + } +} + +/* Line discipline .write_wakeup() */ +static void cx81801_wakeup(struct tty_struct *tty) +{ + v253_ops.write_wakeup(tty); +} + +static struct tty_ldisc_ops cx81801_ops = { + .magic = TTY_LDISC_MAGIC, + .name = "cx81801", + .owner = THIS_MODULE, + .open = cx81801_open, + .close = cx81801_close, + .hangup = cx81801_hangup, + .receive_buf = cx81801_receive, + .write_wakeup = cx81801_wakeup, +}; + + +/* + * Even if not very usefull, the sound card can still work without any of the + * above functonality activated. You can still control its audio input/output + * constellation and speakerphone gain from userspace by issueing AT commands + * over the modem port. + */ + +static int ams_delta_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + + /* Set cpu DAI configuration */ + return snd_soc_dai_set_fmt(rtd->dai->cpu_dai, + SND_SOC_DAIFMT_DSP_A | + SND_SOC_DAIFMT_NB_NF | + SND_SOC_DAIFMT_CBM_CFM); +} + +static struct snd_soc_ops ams_delta_ops = { + .hw_params = ams_delta_hw_params, +}; + + +/* Board specific codec bias level control */ +static int ams_delta_set_bias_level(struct snd_soc_card *card, + enum snd_soc_bias_level level) +{ + struct snd_soc_codec *codec = card->codec; + + switch (level) { + case SND_SOC_BIAS_ON: + case SND_SOC_BIAS_PREPARE: + case SND_SOC_BIAS_STANDBY: + if (codec->bias_level == SND_SOC_BIAS_OFF) + ams_delta_latch2_write(AMS_DELTA_LATCH2_MODEM_NRESET, + AMS_DELTA_LATCH2_MODEM_NRESET); + break; + case SND_SOC_BIAS_OFF: + if (codec->bias_level != SND_SOC_BIAS_OFF) + ams_delta_latch2_write(AMS_DELTA_LATCH2_MODEM_NRESET, + 0); + } + codec->bias_level = level; + + return 0; +} + +/* Digital mute implemented using modem/CPU multiplexer. + * Shares hardware with codec config pulse generation */ +static bool ams_delta_muted = 1; + +static int ams_delta_digital_mute(struct snd_soc_dai *dai, int mute) +{ + int apply; + + if (ams_delta_muted == mute) + return 0; + + spin_lock_bh(&ams_delta_lock); + ams_delta_muted = mute; + apply = !cx81801_cmd_pending; + spin_unlock_bh(&ams_delta_lock); + + if (apply) + ams_delta_latch2_write(AMS_DELTA_LATCH2_MODEM_CODEC, + mute ? AMS_DELTA_LATCH2_MODEM_CODEC : 0); + return 0; +} + +/* Our codec DAI probably doesn't have its own .ops structure */ +static struct snd_soc_dai_ops ams_delta_dai_ops = { + .digital_mute = ams_delta_digital_mute, +}; + +/* Will be used if the codec ever has its own digital_mute function */ +static int ams_delta_startup(struct snd_pcm_substream *substream) +{ + return ams_delta_digital_mute(NULL, 0); +} + +static void ams_delta_shutdown(struct snd_pcm_substream *substream) +{ + ams_delta_digital_mute(NULL, 1); +} + + +/* + * Card initialization + */ + +static int ams_delta_cx20442_init(struct snd_soc_codec *codec) +{ + struct snd_soc_dai *codec_dai = codec->dai; + struct snd_soc_card *card = codec->socdev->card; + int ret; + /* Codec is ready, now add/activate board specific controls */ + + /* Set up digital mute if not provided by the codec */ + if (!codec_dai->ops) { + codec_dai->ops = &ams_delta_dai_ops; + } else if (!codec_dai->ops->digital_mute) { + codec_dai->ops->digital_mute = ams_delta_digital_mute; + } else { + ams_delta_ops.startup = ams_delta_startup; + ams_delta_ops.shutdown = ams_delta_shutdown; + } + + /* Set codec bias level */ + ams_delta_set_bias_level(card, SND_SOC_BIAS_STANDBY); + + /* Add hook switch - can be used to control the codec from userspace + * even if line discipline fails */ + ret = snd_soc_jack_new(card, "hook_switch", + SND_JACK_HEADSET, &ams_delta_hook_switch); + if (ret) + dev_warn(card->dev, + "Failed to allocate resources for hook switch, " + "will continue without one.\n"); + else { + ret = snd_soc_jack_add_gpios(&ams_delta_hook_switch, + ARRAY_SIZE(ams_delta_hook_switch_gpios), + ams_delta_hook_switch_gpios); + if (ret) + dev_warn(card->dev, + "Failed to set up hook switch GPIO line, " + "will continue with hook switch inactive.\n"); + } + + /* Register optional line discipline for over the modem control */ + ret = tty_register_ldisc(N_V253, &cx81801_ops); + if (ret) { + dev_warn(card->dev, + "Failed to register line discipline, " + "will continue without any controls.\n"); + return 0; + } + + /* Add board specific DAPM widgets and routes */ + ret = snd_soc_dapm_new_controls(codec, ams_delta_dapm_widgets, + ARRAY_SIZE(ams_delta_dapm_widgets)); + if (ret) { + dev_warn(card->dev, + "Failed to register DAPM controls, " + "will continue without any.\n"); + return 0; + } + + ret = snd_soc_dapm_add_routes(codec, ams_delta_audio_map, + ARRAY_SIZE(ams_delta_audio_map)); + if (ret) { + dev_warn(card->dev, + "Failed to set up DAPM routes, " + "will continue with codec default map.\n"); + return 0; + } + + /* Set up initial pin constellation */ + snd_soc_dapm_disable_pin(codec, "Mouthpiece"); + snd_soc_dapm_enable_pin(codec, "Earpiece"); + snd_soc_dapm_enable_pin(codec, "Microphone"); + snd_soc_dapm_disable_pin(codec, "Speaker"); + snd_soc_dapm_disable_pin(codec, "AGCIN"); + snd_soc_dapm_disable_pin(codec, "AGCOUT"); + snd_soc_dapm_sync(codec); + + /* Add virtual switch */ + ret = snd_soc_add_controls(codec, ams_delta_audio_controls, + ARRAY_SIZE(ams_delta_audio_controls)); + if (ret) + dev_warn(card->dev, + "Failed to register audio mode control, " + "will continue without it.\n"); + + return 0; +} + +/* DAI glue - connects codec <--> CPU */ +static struct snd_soc_dai_link ams_delta_dai_link = { + .name = "CX20442", + .stream_name = "CX20442", + .cpu_dai = &omap_mcbsp_dai[0], + .codec_dai = &cx20442_dai, + .init = ams_delta_cx20442_init, + .ops = &ams_delta_ops, +}; + +/* Audio card driver */ +static struct snd_soc_card ams_delta_audio_card = { + .name = "AMS_DELTA", + .platform = &omap_soc_platform, + .dai_link = &ams_delta_dai_link, + .num_links = 1, + .set_bias_level = ams_delta_set_bias_level, +}; + +/* Audio subsystem */ +static struct snd_soc_device ams_delta_snd_soc_device = { + .card = &ams_delta_audio_card, + .codec_dev = &cx20442_codec_dev, +}; + +/* Module init/exit */ +static struct platform_device *ams_delta_audio_platform_device; +static struct platform_device *cx20442_platform_device; + +static int __init ams_delta_module_init(void) +{ + int ret; + + if (!(machine_is_ams_delta())) + return -ENODEV; + + ams_delta_audio_platform_device = + platform_device_alloc("soc-audio", -1); + if (!ams_delta_audio_platform_device) + return -ENOMEM; + + platform_set_drvdata(ams_delta_audio_platform_device, + &ams_delta_snd_soc_device); + ams_delta_snd_soc_device.dev = &ams_delta_audio_platform_device->dev; + *(unsigned int *)ams_delta_dai_link.cpu_dai->private_data = OMAP_MCBSP1; + + ret = platform_device_add(ams_delta_audio_platform_device); + if (ret) + goto err; + + /* + * Codec platform device could be registered from elsewhere (board?), + * but I do it here as it makes sense only if used with the card. + */ + cx20442_platform_device = platform_device_register_simple("cx20442", + -1, NULL, 0); + return 0; +err: + platform_device_put(ams_delta_audio_platform_device); + return ret; +} +module_init(ams_delta_module_init); + +static void __exit ams_delta_module_exit(void) +{ + struct snd_soc_codec *codec; + struct tty_struct *tty; + + if (ams_delta_audio_card.codec) { + codec = ams_delta_audio_card.codec; + + if (codec->control_data) { + tty = codec->control_data; + + tty_hangup(tty); + } + } + + if (tty_unregister_ldisc(N_V253) != 0) + dev_warn(&ams_delta_audio_platform_device->dev, + "failed to unregister V253 line discipline\n"); + + snd_soc_jack_free_gpios(&ams_delta_hook_switch, + ARRAY_SIZE(ams_delta_hook_switch_gpios), + ams_delta_hook_switch_gpios); + + /* Keep modem power on */ + ams_delta_set_bias_level(&ams_delta_audio_card, SND_SOC_BIAS_STANDBY); + + platform_device_unregister(cx20442_platform_device); + platform_device_unregister(ams_delta_audio_platform_device); +} +module_exit(ams_delta_module_exit); + +MODULE_AUTHOR("Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>"); +MODULE_DESCRIPTION("ALSA SoC driver for Amstrad E3 (Delta) videophone"); +MODULE_LICENSE("GPL"); |