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Diffstat (limited to 'sound/soc/codecs/wl1273.c')
-rw-r--r--sound/soc/codecs/wl1273.c523
1 files changed, 523 insertions, 0 deletions
diff --git a/sound/soc/codecs/wl1273.c b/sound/soc/codecs/wl1273.c
new file mode 100644
index 000000000..80fb1dc81
--- /dev/null
+++ b/sound/soc/codecs/wl1273.c
@@ -0,0 +1,523 @@
+/*
+ * ALSA SoC WL1273 codec driver
+ *
+ * Author: Matti Aaltonen, <matti.j.aaltonen@nokia.com>
+ *
+ * Copyright: (C) 2010, 2011 Nokia Corporation
+ *
+ * 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/mfd/wl1273-core.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/initval.h>
+
+#include "wl1273.h"
+
+enum wl1273_mode { WL1273_MODE_BT, WL1273_MODE_FM_RX, WL1273_MODE_FM_TX };
+
+/* codec private data */
+struct wl1273_priv {
+ enum wl1273_mode mode;
+ struct wl1273_core *core;
+ unsigned int channels;
+};
+
+static int snd_wl1273_fm_set_i2s_mode(struct wl1273_core *core,
+ int rate, int width)
+{
+ struct device *dev = &core->client->dev;
+ int r = 0;
+ u16 mode;
+
+ dev_dbg(dev, "rate: %d\n", rate);
+ dev_dbg(dev, "width: %d\n", width);
+
+ mutex_lock(&core->lock);
+
+ mode = core->i2s_mode & ~WL1273_IS2_WIDTH & ~WL1273_IS2_RATE;
+
+ switch (rate) {
+ case 48000:
+ mode |= WL1273_IS2_RATE_48K;
+ break;
+ case 44100:
+ mode |= WL1273_IS2_RATE_44_1K;
+ break;
+ case 32000:
+ mode |= WL1273_IS2_RATE_32K;
+ break;
+ case 22050:
+ mode |= WL1273_IS2_RATE_22_05K;
+ break;
+ case 16000:
+ mode |= WL1273_IS2_RATE_16K;
+ break;
+ case 12000:
+ mode |= WL1273_IS2_RATE_12K;
+ break;
+ case 11025:
+ mode |= WL1273_IS2_RATE_11_025;
+ break;
+ case 8000:
+ mode |= WL1273_IS2_RATE_8K;
+ break;
+ default:
+ dev_err(dev, "Sampling rate: %d not supported\n", rate);
+ r = -EINVAL;
+ goto out;
+ }
+
+ switch (width) {
+ case 16:
+ mode |= WL1273_IS2_WIDTH_32;
+ break;
+ case 20:
+ mode |= WL1273_IS2_WIDTH_40;
+ break;
+ case 24:
+ mode |= WL1273_IS2_WIDTH_48;
+ break;
+ case 25:
+ mode |= WL1273_IS2_WIDTH_50;
+ break;
+ case 30:
+ mode |= WL1273_IS2_WIDTH_60;
+ break;
+ case 32:
+ mode |= WL1273_IS2_WIDTH_64;
+ break;
+ case 40:
+ mode |= WL1273_IS2_WIDTH_80;
+ break;
+ case 48:
+ mode |= WL1273_IS2_WIDTH_96;
+ break;
+ case 64:
+ mode |= WL1273_IS2_WIDTH_128;
+ break;
+ default:
+ dev_err(dev, "Data width: %d not supported\n", width);
+ r = -EINVAL;
+ goto out;
+ }
+
+ dev_dbg(dev, "WL1273_I2S_DEF_MODE: 0x%04x\n", WL1273_I2S_DEF_MODE);
+ dev_dbg(dev, "core->i2s_mode: 0x%04x\n", core->i2s_mode);
+ dev_dbg(dev, "mode: 0x%04x\n", mode);
+
+ if (core->i2s_mode != mode) {
+ r = core->write(core, WL1273_I2S_MODE_CONFIG_SET, mode);
+ if (r)
+ goto out;
+
+ core->i2s_mode = mode;
+ r = core->write(core, WL1273_AUDIO_ENABLE,
+ WL1273_AUDIO_ENABLE_I2S);
+ if (r)
+ goto out;
+ }
+out:
+ mutex_unlock(&core->lock);
+
+ return r;
+}
+
+static int snd_wl1273_fm_set_channel_number(struct wl1273_core *core,
+ int channel_number)
+{
+ struct device *dev = &core->client->dev;
+ int r = 0;
+
+ dev_dbg(dev, "%s\n", __func__);
+
+ mutex_lock(&core->lock);
+
+ if (core->channel_number == channel_number)
+ goto out;
+
+ if (channel_number == 1 && core->mode == WL1273_MODE_RX)
+ r = core->write(core, WL1273_MOST_MODE_SET, WL1273_RX_MONO);
+ else if (channel_number == 1 && core->mode == WL1273_MODE_TX)
+ r = core->write(core, WL1273_MONO_SET, WL1273_TX_MONO);
+ else if (channel_number == 2 && core->mode == WL1273_MODE_RX)
+ r = core->write(core, WL1273_MOST_MODE_SET, WL1273_RX_STEREO);
+ else if (channel_number == 2 && core->mode == WL1273_MODE_TX)
+ r = core->write(core, WL1273_MONO_SET, WL1273_TX_STEREO);
+ else
+ r = -EINVAL;
+out:
+ mutex_unlock(&core->lock);
+
+ return r;
+}
+
+static int snd_wl1273_get_audio_route(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
+ struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
+
+ ucontrol->value.integer.value[0] = wl1273->mode;
+
+ return 0;
+}
+
+/*
+ * TODO: Implement the audio routing in the driver. Now this control
+ * only indicates the setting that has been done elsewhere (in the user
+ * space).
+ */
+static const char * const wl1273_audio_route[] = { "Bt", "FmRx", "FmTx" };
+
+static int snd_wl1273_set_audio_route(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
+ struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
+
+ if (wl1273->mode == ucontrol->value.integer.value[0])
+ return 0;
+
+ /* Do not allow changes while stream is running */
+ if (snd_soc_codec_is_active(codec))
+ return -EPERM;
+
+ if (ucontrol->value.integer.value[0] < 0 ||
+ ucontrol->value.integer.value[0] >= ARRAY_SIZE(wl1273_audio_route))
+ return -EINVAL;
+
+ wl1273->mode = ucontrol->value.integer.value[0];
+
+ return 1;
+}
+
+static SOC_ENUM_SINGLE_EXT_DECL(wl1273_enum, wl1273_audio_route);
+
+static int snd_wl1273_fm_audio_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
+ struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
+
+ dev_dbg(codec->dev, "%s: enter.\n", __func__);
+
+ ucontrol->value.integer.value[0] = wl1273->core->audio_mode;
+
+ return 0;
+}
+
+static int snd_wl1273_fm_audio_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
+ struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
+ int val, r = 0;
+
+ dev_dbg(codec->dev, "%s: enter.\n", __func__);
+
+ val = ucontrol->value.integer.value[0];
+ if (wl1273->core->audio_mode == val)
+ return 0;
+
+ r = wl1273->core->set_audio(wl1273->core, val);
+ if (r < 0)
+ return r;
+
+ return 1;
+}
+
+static const char * const wl1273_audio_strings[] = { "Digital", "Analog" };
+
+static SOC_ENUM_SINGLE_EXT_DECL(wl1273_audio_enum, wl1273_audio_strings);
+
+static int snd_wl1273_fm_volume_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
+ struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
+
+ dev_dbg(codec->dev, "%s: enter.\n", __func__);
+
+ ucontrol->value.integer.value[0] = wl1273->core->volume;
+
+ return 0;
+}
+
+static int snd_wl1273_fm_volume_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
+ struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
+ int r;
+
+ dev_dbg(codec->dev, "%s: enter.\n", __func__);
+
+ r = wl1273->core->set_volume(wl1273->core,
+ ucontrol->value.integer.value[0]);
+ if (r)
+ return r;
+
+ return 1;
+}
+
+static const struct snd_kcontrol_new wl1273_controls[] = {
+ SOC_ENUM_EXT("Codec Mode", wl1273_enum,
+ snd_wl1273_get_audio_route, snd_wl1273_set_audio_route),
+ SOC_ENUM_EXT("Audio Switch", wl1273_audio_enum,
+ snd_wl1273_fm_audio_get, snd_wl1273_fm_audio_put),
+ SOC_SINGLE_EXT("Volume", 0, 0, WL1273_MAX_VOLUME, 0,
+ snd_wl1273_fm_volume_get, snd_wl1273_fm_volume_put),
+};
+
+static const struct snd_soc_dapm_widget wl1273_dapm_widgets[] = {
+ SND_SOC_DAPM_INPUT("RX"),
+
+ SND_SOC_DAPM_OUTPUT("TX"),
+};
+
+static const struct snd_soc_dapm_route wl1273_dapm_routes[] = {
+ { "Capture", NULL, "RX" },
+
+ { "TX", NULL, "Playback" },
+};
+
+static int wl1273_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_codec *codec = dai->codec;
+ struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
+
+ switch (wl1273->mode) {
+ case WL1273_MODE_BT:
+ snd_pcm_hw_constraint_minmax(substream->runtime,
+ SNDRV_PCM_HW_PARAM_RATE,
+ 8000, 8000);
+ snd_pcm_hw_constraint_minmax(substream->runtime,
+ SNDRV_PCM_HW_PARAM_CHANNELS, 1, 1);
+ break;
+ case WL1273_MODE_FM_RX:
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ pr_err("Cannot play in RX mode.\n");
+ return -EINVAL;
+ }
+ break;
+ case WL1273_MODE_FM_TX:
+ if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
+ pr_err("Cannot capture in TX mode.\n");
+ return -EINVAL;
+ }
+ break;
+ default:
+ return -EINVAL;
+ break;
+ }
+
+ return 0;
+}
+
+static int wl1273_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(dai->codec);
+ struct wl1273_core *core = wl1273->core;
+ unsigned int rate, width, r;
+
+ if (params_width(params) != 16) {
+ dev_err(dai->dev, "%d bits/sample not supported\n",
+ params_width(params));
+ return -EINVAL;
+ }
+
+ rate = params_rate(params);
+ width = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)->min;
+
+ if (wl1273->mode == WL1273_MODE_BT) {
+ if (rate != 8000) {
+ pr_err("Rate %d not supported.\n", params_rate(params));
+ return -EINVAL;
+ }
+
+ if (params_channels(params) != 1) {
+ pr_err("Only mono supported.\n");
+ return -EINVAL;
+ }
+
+ return 0;
+ }
+
+ if (wl1273->mode == WL1273_MODE_FM_TX &&
+ substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
+ pr_err("Only playback supported with TX.\n");
+ return -EINVAL;
+ }
+
+ if (wl1273->mode == WL1273_MODE_FM_RX &&
+ substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ pr_err("Only capture supported with RX.\n");
+ return -EINVAL;
+ }
+
+ if (wl1273->mode != WL1273_MODE_FM_RX &&
+ wl1273->mode != WL1273_MODE_FM_TX) {
+ pr_err("Unexpected mode: %d.\n", wl1273->mode);
+ return -EINVAL;
+ }
+
+ r = snd_wl1273_fm_set_i2s_mode(core, rate, width);
+ if (r)
+ return r;
+
+ wl1273->channels = params_channels(params);
+ r = snd_wl1273_fm_set_channel_number(core, wl1273->channels);
+ if (r)
+ return r;
+
+ return 0;
+}
+
+static const struct snd_soc_dai_ops wl1273_dai_ops = {
+ .startup = wl1273_startup,
+ .hw_params = wl1273_hw_params,
+};
+
+static struct snd_soc_dai_driver wl1273_dai = {
+ .name = "wl1273-fm",
+ .playback = {
+ .stream_name = "Playback",
+ .channels_min = 1,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_8000_48000,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE},
+ .capture = {
+ .stream_name = "Capture",
+ .channels_min = 1,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_8000_48000,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE},
+ .ops = &wl1273_dai_ops,
+};
+
+/* Audio interface format for the soc_card driver */
+int wl1273_get_format(struct snd_soc_codec *codec, unsigned int *fmt)
+{
+ struct wl1273_priv *wl1273;
+
+ if (codec == NULL || fmt == NULL)
+ return -EINVAL;
+
+ wl1273 = snd_soc_codec_get_drvdata(codec);
+
+ switch (wl1273->mode) {
+ case WL1273_MODE_FM_RX:
+ case WL1273_MODE_FM_TX:
+ *fmt = SND_SOC_DAIFMT_I2S |
+ SND_SOC_DAIFMT_NB_NF |
+ SND_SOC_DAIFMT_CBM_CFM;
+
+ break;
+ case WL1273_MODE_BT:
+ *fmt = SND_SOC_DAIFMT_DSP_A |
+ SND_SOC_DAIFMT_IB_NF |
+ SND_SOC_DAIFMT_CBM_CFM;
+
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(wl1273_get_format);
+
+static int wl1273_probe(struct snd_soc_codec *codec)
+{
+ struct wl1273_core **core = codec->dev->platform_data;
+ struct wl1273_priv *wl1273;
+
+ dev_dbg(codec->dev, "%s.\n", __func__);
+
+ if (!core) {
+ dev_err(codec->dev, "Platform data is missing.\n");
+ return -EINVAL;
+ }
+
+ wl1273 = kzalloc(sizeof(struct wl1273_priv), GFP_KERNEL);
+ if (!wl1273)
+ return -ENOMEM;
+
+ wl1273->mode = WL1273_MODE_BT;
+ wl1273->core = *core;
+
+ snd_soc_codec_set_drvdata(codec, wl1273);
+
+ return 0;
+}
+
+static int wl1273_remove(struct snd_soc_codec *codec)
+{
+ struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec);
+
+ dev_dbg(codec->dev, "%s\n", __func__);
+ kfree(wl1273);
+
+ return 0;
+}
+
+static struct snd_soc_codec_driver soc_codec_dev_wl1273 = {
+ .probe = wl1273_probe,
+ .remove = wl1273_remove,
+
+ .controls = wl1273_controls,
+ .num_controls = ARRAY_SIZE(wl1273_controls),
+ .dapm_widgets = wl1273_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(wl1273_dapm_widgets),
+ .dapm_routes = wl1273_dapm_routes,
+ .num_dapm_routes = ARRAY_SIZE(wl1273_dapm_routes),
+};
+
+static int wl1273_platform_probe(struct platform_device *pdev)
+{
+ return snd_soc_register_codec(&pdev->dev, &soc_codec_dev_wl1273,
+ &wl1273_dai, 1);
+}
+
+static int wl1273_platform_remove(struct platform_device *pdev)
+{
+ snd_soc_unregister_codec(&pdev->dev);
+ return 0;
+}
+
+MODULE_ALIAS("platform:wl1273-codec");
+
+static struct platform_driver wl1273_platform_driver = {
+ .driver = {
+ .name = "wl1273-codec",
+ },
+ .probe = wl1273_platform_probe,
+ .remove = wl1273_platform_remove,
+};
+
+module_platform_driver(wl1273_platform_driver);
+
+MODULE_AUTHOR("Matti Aaltonen <matti.j.aaltonen@nokia.com>");
+MODULE_DESCRIPTION("ASoC WL1273 codec driver");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-06 11:52:12 +0000