+++ /dev/null
-// 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 },
- { }
-};
-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)
-{
- 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");
gentwo / linux / .git / commitdiff