linux/drivers/mfd/wl1273-core.c
Thomas Gleixner 2b27bdcc20 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 336
Based on 1 normalized pattern(s):

  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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 246 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Alexios Zavras <alexios.zavras@intel.com>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190530000436.674189849@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-05 17:37:07 +02:00

264 lines
5.7 KiB
C

// SPDX-License-Identifier: GPL-2.0-only
/*
* MFD driver for wl1273 FM radio and audio codec submodules.
*
* Copyright (C) 2011 Nokia Corporation
* Author: Matti Aaltonen <matti.j.aaltonen@nokia.com>
*/
#include <linux/mfd/wl1273-core.h>
#include <linux/slab.h>
#include <linux/module.h>
#define DRIVER_DESC "WL1273 FM Radio Core"
static const struct i2c_device_id wl1273_driver_id_table[] = {
{ WL1273_FM_DRIVER_NAME, 0 },
{ }
};
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)
{
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_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct wl1273_fm_platform_data *pdata = dev_get_platdata(&client->dev);
struct wl1273_core *core;
struct mfd_cell *cell;
int children = 0;
int r = 0;
dev_dbg(&client->dev, "%s\n", __func__);
if (!pdata) {
dev_err(&client->dev, "No platform data.\n");
return -EINVAL;
}
if (!(pdata->children & WL1273_RADIO_CHILD)) {
dev_err(&client->dev, "Cannot function without radio child.\n");
return -EINVAL;
}
core = devm_kzalloc(&client->dev, sizeof(*core), GFP_KERNEL);
if (!core)
return -ENOMEM;
core->pdata = pdata;
core->client = client;
mutex_init(&core->lock);
i2c_set_clientdata(client, core);
dev_dbg(&client->dev, "%s: Have V4L2.\n", __func__);
cell = &core->cells[children];
cell->name = "wl1273_fm_radio";
cell->platform_data = &core;
cell->pdata_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];
dev_dbg(&client->dev, "%s: Have codec.\n", __func__);
cell->name = "wl1273-codec";
cell->platform_data = &core;
cell->pdata_size = sizeof(core);
children++;
}
dev_dbg(&client->dev, "%s: number of children: %d.\n",
__func__, children);
r = devm_mfd_add_devices(&client->dev, -1, core->cells,
children, NULL, 0, NULL);
if (r)
goto err;
return 0;
err:
pdata->free_resources();
dev_dbg(&client->dev, "%s\n", __func__);
return r;
}
static struct i2c_driver wl1273_core_driver = {
.driver = {
.name = WL1273_FM_DRIVER_NAME,
},
.probe = wl1273_core_probe,
.id_table = wl1273_driver_id_table,
};
static int __init wl1273_core_init(void)
{
int r;
r = i2c_add_driver(&wl1273_core_driver);
if (r) {
pr_err(WL1273_FM_DRIVER_NAME
": driver registration failed\n");
return r;
}
return r;
}
static void __exit wl1273_core_exit(void)
{
i2c_del_driver(&wl1273_core_driver);
}
late_initcall(wl1273_core_init);
module_exit(wl1273_core_exit);
MODULE_AUTHOR("Matti Aaltonen <matti.j.aaltonen@nokia.com>");
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");