forked from Minki/linux
383268a8e2
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>
149 lines
3.4 KiB
C
149 lines
3.4 KiB
C
/*
|
|
* MFD driver for wl1273 FM radio and audio codec submodules.
|
|
*
|
|
* Copyright (C) 2010 Nokia Corporation
|
|
* Author: Matti Aaltonen <matti.j.aaltonen@nokia.com>
|
|
*
|
|
* 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>
|
|
|
|
#define DRIVER_DESC "WL1273 FM Radio Core"
|
|
|
|
static struct i2c_device_id wl1273_driver_id_table[] = {
|
|
{ WL1273_FM_DRIVER_NAME, 0 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, wl1273_driver_id_table);
|
|
|
|
static int wl1273_core_remove(struct i2c_client *client)
|
|
{
|
|
struct wl1273_core *core = i2c_get_clientdata(client);
|
|
|
|
dev_dbg(&client->dev, "%s\n", __func__);
|
|
|
|
mfd_remove_devices(&client->dev);
|
|
i2c_set_clientdata(client, NULL);
|
|
kfree(core);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __devinit wl1273_core_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct wl1273_fm_platform_data *pdata = client->dev.platform_data;
|
|
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 = kzalloc(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->data_size = sizeof(core);
|
|
children++;
|
|
|
|
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->data_size = sizeof(core);
|
|
children++;
|
|
}
|
|
|
|
dev_dbg(&client->dev, "%s: number of children: %d.\n",
|
|
__func__, children);
|
|
|
|
r = mfd_add_devices(&client->dev, -1, core->cells,
|
|
children, NULL, 0);
|
|
if (r)
|
|
goto err;
|
|
|
|
return 0;
|
|
|
|
err:
|
|
i2c_set_clientdata(client, NULL);
|
|
pdata->free_resources();
|
|
kfree(core);
|
|
|
|
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,
|
|
.remove = __devexit_p(wl1273_core_remove),
|
|
};
|
|
|
|
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");
|