[media] MFD: WL1273 FM Radio: MFD driver for the FM radio
This is the core of the WL1273 FM radio driver, it connects
the two child modules. The two child drivers are
drivers/media/radio/radio-wl1273.c and sound/soc/codecs/wl1273.c.
The radio-wl1273 driver implements the V4L2 interface and communicates
with the device. The ALSA codec offers digital audio, without it only
analog audio is available.
Signed-off-by: Matti J. Aaltonen <matti.j.aaltonen@nokia.com>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/mfd/wl1273-core.c b/drivers/mfd/wl1273-core.c
index d2ecc24..4025a4b 100644
--- a/drivers/mfd/wl1273-core.c
+++ b/drivers/mfd/wl1273-core.c
@@ -1,7 +1,7 @@
/*
* MFD driver for wl1273 FM radio and audio codec submodules.
*
- * Copyright (C) 2010 Nokia Corporation
+ * Copyright (C) 2011 Nokia Corporation
* Author: Matti Aaltonen <matti.j.aaltonen@nokia.com>
*
* This program is free software; you can redistribute it and/or modify
@@ -31,6 +31,145 @@
};
MODULE_DEVICE_TABLE(i2c, wl1273_driver_id_table);
+static int wl1273_fm_read_reg(struct wl1273_core *core, u8 reg, u16 *value)
+{
+ struct i2c_client *client = core->client;
+ u8 b[2];
+ int r;
+
+ r = i2c_smbus_read_i2c_block_data(client, reg, sizeof(b), b);
+ if (r != 2) {
+ dev_err(&client->dev, "%s: Read: %d fails.\n", __func__, reg);
+ return -EREMOTEIO;
+ }
+
+ *value = (u16)b[0] << 8 | b[1];
+
+ return 0;
+}
+
+static int wl1273_fm_write_cmd(struct wl1273_core *core, u8 cmd, u16 param)
+{
+ struct i2c_client *client = core->client;
+ u8 buf[] = { (param >> 8) & 0xff, param & 0xff };
+ int r;
+
+ r = i2c_smbus_write_i2c_block_data(client, cmd, sizeof(buf), buf);
+ if (r) {
+ dev_err(&client->dev, "%s: Cmd: %d fails.\n", __func__, cmd);
+ return r;
+ }
+
+ return 0;
+}
+
+static int wl1273_fm_write_data(struct wl1273_core *core, u8 *data, u16 len)
+{
+ struct i2c_client *client = core->client;
+ struct i2c_msg msg;
+ int r;
+
+ msg.addr = client->addr;
+ msg.flags = 0;
+ msg.buf = data;
+ msg.len = len;
+
+ r = i2c_transfer(client->adapter, &msg, 1);
+ if (r != 1) {
+ dev_err(&client->dev, "%s: write error.\n", __func__);
+ return -EREMOTEIO;
+ }
+
+ return 0;
+}
+
+/**
+ * wl1273_fm_set_audio() - Set audio mode.
+ * @core: A pointer to the device struct.
+ * @new_mode: The new audio mode.
+ *
+ * Audio modes are WL1273_AUDIO_DIGITAL and WL1273_AUDIO_ANALOG.
+ */
+static int wl1273_fm_set_audio(struct wl1273_core *core, unsigned int new_mode)
+{
+ int r = 0;
+
+ if (core->mode == WL1273_MODE_OFF ||
+ core->mode == WL1273_MODE_SUSPENDED)
+ return -EPERM;
+
+ if (core->mode == WL1273_MODE_RX && new_mode == WL1273_AUDIO_DIGITAL) {
+ r = wl1273_fm_write_cmd(core, WL1273_PCM_MODE_SET,
+ WL1273_PCM_DEF_MODE);
+ if (r)
+ goto out;
+
+ r = wl1273_fm_write_cmd(core, WL1273_I2S_MODE_CONFIG_SET,
+ core->i2s_mode);
+ if (r)
+ goto out;
+
+ r = wl1273_fm_write_cmd(core, WL1273_AUDIO_ENABLE,
+ WL1273_AUDIO_ENABLE_I2S);
+ if (r)
+ goto out;
+
+ } else if (core->mode == WL1273_MODE_RX &&
+ new_mode == WL1273_AUDIO_ANALOG) {
+ r = wl1273_fm_write_cmd(core, WL1273_AUDIO_ENABLE,
+ WL1273_AUDIO_ENABLE_ANALOG);
+ if (r)
+ goto out;
+
+ } else if (core->mode == WL1273_MODE_TX &&
+ new_mode == WL1273_AUDIO_DIGITAL) {
+ r = wl1273_fm_write_cmd(core, WL1273_I2S_MODE_CONFIG_SET,
+ core->i2s_mode);
+ if (r)
+ goto out;
+
+ r = wl1273_fm_write_cmd(core, WL1273_AUDIO_IO_SET,
+ WL1273_AUDIO_IO_SET_I2S);
+ if (r)
+ goto out;
+
+ } else if (core->mode == WL1273_MODE_TX &&
+ new_mode == WL1273_AUDIO_ANALOG) {
+ r = wl1273_fm_write_cmd(core, WL1273_AUDIO_IO_SET,
+ WL1273_AUDIO_IO_SET_ANALOG);
+ if (r)
+ goto out;
+ }
+
+ core->audio_mode = new_mode;
+out:
+ return r;
+}
+
+/**
+ * wl1273_fm_set_volume() - Set volume.
+ * @core: A pointer to the device struct.
+ * @volume: The new volume value.
+ */
+static int wl1273_fm_set_volume(struct wl1273_core *core, unsigned int volume)
+{
+ u16 val;
+ int r;
+
+ if (volume > WL1273_MAX_VOLUME)
+ return -EINVAL;
+
+ if (core->volume == volume)
+ return 0;
+
+ r = wl1273_fm_write_cmd(core, WL1273_VOLUME_SET, volume);
+ if (r)
+ return r;
+
+ core->volume = volume;
+ return 0;
+}
+
static int wl1273_core_remove(struct i2c_client *client)
{
struct wl1273_core *core = i2c_get_clientdata(client);
@@ -38,7 +177,6 @@
dev_dbg(&client->dev, "%s\n", __func__);
mfd_remove_devices(&client->dev);
- i2c_set_clientdata(client, NULL);
kfree(core);
return 0;
@@ -83,6 +221,12 @@
cell->data_size = sizeof(core);
children++;
+ core->read = wl1273_fm_read_reg;
+ core->write = wl1273_fm_write_cmd;
+ core->write_data = wl1273_fm_write_data;
+ core->set_audio = wl1273_fm_set_audio;
+ core->set_volume = wl1273_fm_set_volume;
+
if (pdata->children & WL1273_CODEC_CHILD) {
cell = &core->cells[children];
@@ -104,7 +248,6 @@
return 0;
err:
- i2c_set_clientdata(client, NULL);
pdata->free_resources();
kfree(core);