diff options
Diffstat (limited to 'drivers/mfd')
| -rw-r--r-- | drivers/mfd/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/mfd/wl1273-core.c | 149 |
2 files changed, 147 insertions, 4 deletions
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index fd018366d670..9db079be0e08 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -615,7 +615,7 @@ config MFD_VX855 and/or vx855_gpio drivers for this to do anything useful. config MFD_WL1273_CORE - tristate + tristate "Support for TI WL1273 FM radio." depends on I2C select MFD_CORE default n diff --git a/drivers/mfd/wl1273-core.c b/drivers/mfd/wl1273-core.c index d2ecc2435736..4025a4bec8d5 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 @@ static struct i2c_device_id wl1273_driver_id_table[] = { }; 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 @@ static int wl1273_core_remove(struct i2c_client *client) 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 @@ static int __devinit wl1273_core_probe(struct i2c_client *client, 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 @@ static int __devinit wl1273_core_probe(struct i2c_client *client, return 0; err: - i2c_set_clientdata(client, NULL); pdata->free_resources(); kfree(core); |