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507 lines
12 KiB
507 lines
12 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* ALSA SoC WL1273 codec driver |
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* |
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* Author: Matti Aaltonen, <[email protected]> |
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* |
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* Copyright: (C) 2010, 2011 Nokia Corporation |
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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_component *component = snd_soc_kcontrol_component(kcontrol); |
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struct wl1273_priv *wl1273 = snd_soc_component_get_drvdata(component); |
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ucontrol->value.enumerated.item[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_component *component = snd_soc_kcontrol_component(kcontrol); |
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struct wl1273_priv *wl1273 = snd_soc_component_get_drvdata(component); |
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if (wl1273->mode == ucontrol->value.enumerated.item[0]) |
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return 0; |
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/* Do not allow changes while stream is running */ |
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if (snd_soc_component_active(component)) |
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return -EPERM; |
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if (ucontrol->value.enumerated.item[0] >= ARRAY_SIZE(wl1273_audio_route)) |
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return -EINVAL; |
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wl1273->mode = ucontrol->value.enumerated.item[0]; |
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return 1; |
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} |
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static SOC_ENUM_SINGLE_EXT_DECL(wl1273_enum, 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_component *component = snd_soc_kcontrol_component(kcontrol); |
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struct wl1273_priv *wl1273 = snd_soc_component_get_drvdata(component); |
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dev_dbg(component->dev, "%s: enter.\n", __func__); |
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ucontrol->value.enumerated.item[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_component *component = snd_soc_kcontrol_component(kcontrol); |
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struct wl1273_priv *wl1273 = snd_soc_component_get_drvdata(component); |
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int val, r = 0; |
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dev_dbg(component->dev, "%s: enter.\n", __func__); |
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val = ucontrol->value.enumerated.item[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 SOC_ENUM_SINGLE_EXT_DECL(wl1273_audio_enum, 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_component *component = snd_soc_kcontrol_component(kcontrol); |
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struct wl1273_priv *wl1273 = snd_soc_component_get_drvdata(component); |
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dev_dbg(component->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_component *component = snd_soc_kcontrol_component(kcontrol); |
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struct wl1273_priv *wl1273 = snd_soc_component_get_drvdata(component); |
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int r; |
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dev_dbg(component->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 const struct snd_soc_dapm_widget wl1273_dapm_widgets[] = { |
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SND_SOC_DAPM_INPUT("RX"), |
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SND_SOC_DAPM_OUTPUT("TX"), |
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}; |
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static const struct snd_soc_dapm_route wl1273_dapm_routes[] = { |
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{ "Capture", NULL, "RX" }, |
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{ "TX", NULL, "Playback" }, |
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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_component *component = dai->component; |
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struct wl1273_priv *wl1273 = snd_soc_component_get_drvdata(component); |
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switch (wl1273->mode) { |
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case WL1273_MODE_BT: |
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snd_pcm_hw_constraint_single(substream->runtime, |
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SNDRV_PCM_HW_PARAM_RATE, 8000); |
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snd_pcm_hw_constraint_single(substream->runtime, |
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SNDRV_PCM_HW_PARAM_CHANNELS, 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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} |
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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_component_get_drvdata(dai->component); |
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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_width(params) != 16) { |
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dev_err(dai->dev, "%d bits/sample not supported\n", |
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params_width(params)); |
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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_component *component, unsigned int *fmt) |
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{ |
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struct wl1273_priv *wl1273; |
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if (component == NULL || fmt == NULL) |
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return -EINVAL; |
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wl1273 = snd_soc_component_get_drvdata(component); |
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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_component *component) |
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{ |
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struct wl1273_core **core = component->dev->platform_data; |
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struct wl1273_priv *wl1273; |
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dev_dbg(component->dev, "%s.\n", __func__); |
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if (!core) { |
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dev_err(component->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) |
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return -ENOMEM; |
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wl1273->mode = WL1273_MODE_BT; |
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wl1273->core = *core; |
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snd_soc_component_set_drvdata(component, wl1273); |
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return 0; |
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} |
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static void wl1273_remove(struct snd_soc_component *component) |
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{ |
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struct wl1273_priv *wl1273 = snd_soc_component_get_drvdata(component); |
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dev_dbg(component->dev, "%s\n", __func__); |
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kfree(wl1273); |
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} |
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static const struct snd_soc_component_driver soc_component_dev_wl1273 = { |
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.probe = wl1273_probe, |
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.remove = wl1273_remove, |
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.controls = wl1273_controls, |
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.num_controls = ARRAY_SIZE(wl1273_controls), |
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.dapm_widgets = wl1273_dapm_widgets, |
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.num_dapm_widgets = ARRAY_SIZE(wl1273_dapm_widgets), |
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.dapm_routes = wl1273_dapm_routes, |
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.num_dapm_routes = ARRAY_SIZE(wl1273_dapm_routes), |
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.idle_bias_on = 1, |
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.use_pmdown_time = 1, |
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.endianness = 1, |
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.non_legacy_dai_naming = 1, |
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}; |
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static int wl1273_platform_probe(struct platform_device *pdev) |
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{ |
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return devm_snd_soc_register_component(&pdev->dev, |
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&soc_component_dev_wl1273, |
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&wl1273_dai, 1); |
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} |
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static int wl1273_platform_remove(struct platform_device *pdev) |
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{ |
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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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}, |
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.probe = wl1273_platform_probe, |
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.remove = 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 <[email protected]>"); |
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MODULE_DESCRIPTION("ASoC WL1273 codec driver"); |
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MODULE_LICENSE("GPL");
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