516 lines
12 KiB
C
516 lines
12 KiB
C
/*
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* ALSA SoC WL1273 codec driver
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*
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* Author: Matti Aaltonen, <matti.j.aaltonen@nokia.com>
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*
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* Copyright: (C) 2010, 2011 Nokia Corporation
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* 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, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*
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*/
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#include <linux/mfd/wl1273-core.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/soc.h>
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#include <sound/initval.h>
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#include "wl1273.h"
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enum wl1273_mode { WL1273_MODE_BT, WL1273_MODE_FM_RX, WL1273_MODE_FM_TX };
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/* codec private data */
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struct wl1273_priv {
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enum wl1273_mode mode;
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struct wl1273_core *core;
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unsigned int channels;
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};
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static int snd_wl1273_fm_set_i2s_mode(struct wl1273_core *core,
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int rate, int width)
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{
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struct device *dev = &core->client->dev;
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int r = 0;
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u16 mode;
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dev_dbg(dev, "rate: %d\n", rate);
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dev_dbg(dev, "width: %d\n", width);
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mutex_lock(&core->lock);
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mode = core->i2s_mode & ~WL1273_IS2_WIDTH & ~WL1273_IS2_RATE;
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switch (rate) {
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case 48000:
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mode |= WL1273_IS2_RATE_48K;
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break;
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case 44100:
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mode |= WL1273_IS2_RATE_44_1K;
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break;
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case 32000:
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mode |= WL1273_IS2_RATE_32K;
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break;
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case 22050:
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mode |= WL1273_IS2_RATE_22_05K;
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break;
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case 16000:
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mode |= WL1273_IS2_RATE_16K;
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break;
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case 12000:
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mode |= WL1273_IS2_RATE_12K;
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break;
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case 11025:
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mode |= WL1273_IS2_RATE_11_025;
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break;
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case 8000:
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mode |= WL1273_IS2_RATE_8K;
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break;
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default:
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dev_err(dev, "Sampling rate: %d not supported\n", rate);
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r = -EINVAL;
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goto out;
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}
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switch (width) {
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case 16:
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mode |= WL1273_IS2_WIDTH_32;
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break;
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case 20:
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mode |= WL1273_IS2_WIDTH_40;
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break;
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case 24:
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mode |= WL1273_IS2_WIDTH_48;
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break;
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case 25:
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mode |= WL1273_IS2_WIDTH_50;
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break;
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case 30:
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mode |= WL1273_IS2_WIDTH_60;
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break;
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case 32:
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mode |= WL1273_IS2_WIDTH_64;
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break;
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case 40:
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mode |= WL1273_IS2_WIDTH_80;
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break;
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case 48:
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mode |= WL1273_IS2_WIDTH_96;
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break;
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case 64:
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mode |= WL1273_IS2_WIDTH_128;
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break;
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default:
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dev_err(dev, "Data width: %d not supported\n", width);
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r = -EINVAL;
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goto out;
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}
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dev_dbg(dev, "WL1273_I2S_DEF_MODE: 0x%04x\n", WL1273_I2S_DEF_MODE);
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dev_dbg(dev, "core->i2s_mode: 0x%04x\n", core->i2s_mode);
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dev_dbg(dev, "mode: 0x%04x\n", mode);
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if (core->i2s_mode != mode) {
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r = core->write(core, WL1273_I2S_MODE_CONFIG_SET, mode);
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if (r)
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goto out;
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core->i2s_mode = mode;
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r = core->write(core, WL1273_AUDIO_ENABLE,
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WL1273_AUDIO_ENABLE_I2S);
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if (r)
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goto out;
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}
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out:
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mutex_unlock(&core->lock);
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return r;
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}
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static int snd_wl1273_fm_set_channel_number(struct wl1273_core *core,
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int channel_number)
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{
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struct device *dev = &core->client->dev;
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int r = 0;
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dev_dbg(dev, "%s\n", __func__);
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mutex_lock(&core->lock);
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if (core->channel_number == channel_number)
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goto out;
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if (channel_number == 1 && core->mode == WL1273_MODE_RX)
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r = core->write(core, WL1273_MOST_MODE_SET, WL1273_RX_MONO);
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else if (channel_number == 1 && core->mode == WL1273_MODE_TX)
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r = core->write(core, WL1273_MONO_SET, WL1273_TX_MONO);
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else if (channel_number == 2 && core->mode == WL1273_MODE_RX)
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r = core->write(core, WL1273_MOST_MODE_SET, WL1273_RX_STEREO);
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else if (channel_number == 2 && core->mode == WL1273_MODE_TX)
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r = core->write(core, WL1273_MONO_SET, WL1273_TX_STEREO);
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else
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r = -EINVAL;
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out:
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mutex_unlock(&core->lock);
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return r;
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}
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static int snd_wl1273_get_audio_route(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
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struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
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ucontrol->value.integer.value[0] = wl1273->mode;
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return 0;
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}
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/*
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* TODO: Implement the audio routing in the driver. Now this control
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* only indicates the setting that has been done elsewhere (in the user
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* space).
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*/
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static const char * const wl1273_audio_route[] = { "Bt", "FmRx", "FmTx" };
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static int snd_wl1273_set_audio_route(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
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struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
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if (wl1273->mode == ucontrol->value.integer.value[0])
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return 0;
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/* Do not allow changes while stream is running */
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if (codec->active)
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return -EPERM;
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if (ucontrol->value.integer.value[0] < 0 ||
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ucontrol->value.integer.value[0] >= ARRAY_SIZE(wl1273_audio_route))
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return -EINVAL;
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wl1273->mode = ucontrol->value.integer.value[0];
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return 1;
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}
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static const struct soc_enum wl1273_enum =
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SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(wl1273_audio_route), wl1273_audio_route);
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static int snd_wl1273_fm_audio_get(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
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struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
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dev_dbg(codec->dev, "%s: enter.\n", __func__);
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ucontrol->value.integer.value[0] = wl1273->core->audio_mode;
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return 0;
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}
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static int snd_wl1273_fm_audio_put(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
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struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
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int val, r = 0;
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dev_dbg(codec->dev, "%s: enter.\n", __func__);
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val = ucontrol->value.integer.value[0];
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if (wl1273->core->audio_mode == val)
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return 0;
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r = wl1273->core->set_audio(wl1273->core, val);
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if (r < 0)
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return r;
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return 1;
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}
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static const char * const wl1273_audio_strings[] = { "Digital", "Analog" };
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static const struct soc_enum wl1273_audio_enum =
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SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(wl1273_audio_strings),
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wl1273_audio_strings);
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static int snd_wl1273_fm_volume_get(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
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struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
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dev_dbg(codec->dev, "%s: enter.\n", __func__);
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ucontrol->value.integer.value[0] = wl1273->core->volume;
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return 0;
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}
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static int snd_wl1273_fm_volume_put(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
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struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
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int r;
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dev_dbg(codec->dev, "%s: enter.\n", __func__);
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r = wl1273->core->set_volume(wl1273->core,
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ucontrol->value.integer.value[0]);
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if (r)
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return r;
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return 1;
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}
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static const struct snd_kcontrol_new wl1273_controls[] = {
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SOC_ENUM_EXT("Codec Mode", wl1273_enum,
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snd_wl1273_get_audio_route, snd_wl1273_set_audio_route),
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SOC_ENUM_EXT("Audio Switch", wl1273_audio_enum,
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snd_wl1273_fm_audio_get, snd_wl1273_fm_audio_put),
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SOC_SINGLE_EXT("Volume", 0, 0, WL1273_MAX_VOLUME, 0,
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snd_wl1273_fm_volume_get, snd_wl1273_fm_volume_put),
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};
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static int wl1273_startup(struct snd_pcm_substream *substream,
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struct snd_soc_dai *dai)
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{
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struct snd_soc_codec *codec = dai->codec;
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struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
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switch (wl1273->mode) {
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case WL1273_MODE_BT:
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snd_pcm_hw_constraint_minmax(substream->runtime,
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SNDRV_PCM_HW_PARAM_RATE,
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8000, 8000);
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snd_pcm_hw_constraint_minmax(substream->runtime,
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SNDRV_PCM_HW_PARAM_CHANNELS, 1, 1);
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break;
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case WL1273_MODE_FM_RX:
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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pr_err("Cannot play in RX mode.\n");
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return -EINVAL;
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}
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break;
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case WL1273_MODE_FM_TX:
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if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
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pr_err("Cannot capture in TX mode.\n");
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return -EINVAL;
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}
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break;
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default:
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return -EINVAL;
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break;
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}
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return 0;
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}
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static int wl1273_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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struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(dai->codec);
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struct wl1273_core *core = wl1273->core;
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unsigned int rate, width, r;
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if (params_format(params) != SNDRV_PCM_FORMAT_S16_LE) {
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pr_err("Only SNDRV_PCM_FORMAT_S16_LE supported.\n");
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return -EINVAL;
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}
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rate = params_rate(params);
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width = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)->min;
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if (wl1273->mode == WL1273_MODE_BT) {
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if (rate != 8000) {
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pr_err("Rate %d not supported.\n", params_rate(params));
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return -EINVAL;
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}
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if (params_channels(params) != 1) {
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pr_err("Only mono supported.\n");
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return -EINVAL;
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}
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return 0;
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}
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if (wl1273->mode == WL1273_MODE_FM_TX &&
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substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
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pr_err("Only playback supported with TX.\n");
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return -EINVAL;
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}
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if (wl1273->mode == WL1273_MODE_FM_RX &&
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substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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pr_err("Only capture supported with RX.\n");
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return -EINVAL;
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}
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if (wl1273->mode != WL1273_MODE_FM_RX &&
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wl1273->mode != WL1273_MODE_FM_TX) {
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pr_err("Unexpected mode: %d.\n", wl1273->mode);
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return -EINVAL;
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}
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r = snd_wl1273_fm_set_i2s_mode(core, rate, width);
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if (r)
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return r;
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wl1273->channels = params_channels(params);
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r = snd_wl1273_fm_set_channel_number(core, wl1273->channels);
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if (r)
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return r;
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return 0;
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}
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static const struct snd_soc_dai_ops wl1273_dai_ops = {
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.startup = wl1273_startup,
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.hw_params = wl1273_hw_params,
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};
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static struct snd_soc_dai_driver wl1273_dai = {
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.name = "wl1273-fm",
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.playback = {
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.stream_name = "Playback",
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.channels_min = 1,
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.channels_max = 2,
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.rates = SNDRV_PCM_RATE_8000_48000,
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.formats = SNDRV_PCM_FMTBIT_S16_LE},
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.capture = {
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.stream_name = "Capture",
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.channels_min = 1,
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.channels_max = 2,
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.rates = SNDRV_PCM_RATE_8000_48000,
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.formats = SNDRV_PCM_FMTBIT_S16_LE},
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.ops = &wl1273_dai_ops,
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};
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/* Audio interface format for the soc_card driver */
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int wl1273_get_format(struct snd_soc_codec *codec, unsigned int *fmt)
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{
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struct wl1273_priv *wl1273;
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if (codec == NULL || fmt == NULL)
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return -EINVAL;
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wl1273 = snd_soc_codec_get_drvdata(codec);
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switch (wl1273->mode) {
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case WL1273_MODE_FM_RX:
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case WL1273_MODE_FM_TX:
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*fmt = SND_SOC_DAIFMT_I2S |
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SND_SOC_DAIFMT_NB_NF |
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SND_SOC_DAIFMT_CBM_CFM;
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break;
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case WL1273_MODE_BT:
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*fmt = SND_SOC_DAIFMT_DSP_A |
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SND_SOC_DAIFMT_IB_NF |
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SND_SOC_DAIFMT_CBM_CFM;
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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EXPORT_SYMBOL_GPL(wl1273_get_format);
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static int wl1273_probe(struct snd_soc_codec *codec)
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{
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struct wl1273_core **core = codec->dev->platform_data;
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struct wl1273_priv *wl1273;
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int r;
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dev_dbg(codec->dev, "%s.\n", __func__);
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if (!core) {
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dev_err(codec->dev, "Platform data is missing.\n");
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return -EINVAL;
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}
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wl1273 = kzalloc(sizeof(struct wl1273_priv), GFP_KERNEL);
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if (wl1273 == NULL) {
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dev_err(codec->dev, "Cannot allocate memory.\n");
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return -ENOMEM;
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}
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wl1273->mode = WL1273_MODE_BT;
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wl1273->core = *core;
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snd_soc_codec_set_drvdata(codec, wl1273);
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r = snd_soc_add_codec_controls(codec, wl1273_controls,
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ARRAY_SIZE(wl1273_controls));
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if (r)
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kfree(wl1273);
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return r;
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}
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static int wl1273_remove(struct snd_soc_codec *codec)
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{
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struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
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dev_dbg(codec->dev, "%s\n", __func__);
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kfree(wl1273);
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return 0;
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}
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static struct snd_soc_codec_driver soc_codec_dev_wl1273 = {
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.probe = wl1273_probe,
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.remove = wl1273_remove,
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};
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static int __devinit wl1273_platform_probe(struct platform_device *pdev)
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{
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return snd_soc_register_codec(&pdev->dev, &soc_codec_dev_wl1273,
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&wl1273_dai, 1);
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}
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static int __devexit wl1273_platform_remove(struct platform_device *pdev)
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{
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snd_soc_unregister_codec(&pdev->dev);
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return 0;
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}
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MODULE_ALIAS("platform:wl1273-codec");
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static struct platform_driver wl1273_platform_driver = {
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.driver = {
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.name = "wl1273-codec",
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.owner = THIS_MODULE,
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},
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.probe = wl1273_platform_probe,
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.remove = __devexit_p(wl1273_platform_remove),
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};
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module_platform_driver(wl1273_platform_driver);
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MODULE_AUTHOR("Matti Aaltonen <matti.j.aaltonen@nokia.com>");
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MODULE_DESCRIPTION("ASoC WL1273 codec driver");
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MODULE_LICENSE("GPL");
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