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
/*
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* MFD driver for wl1273 FM radio and audio codec submodules.
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*
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* Copyright (C) 2010 Nokia Corporation
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* Author: Matti Aaltonen <matti.j.aaltonen@nokia.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*
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*/
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#include <linux/mfd/wl1273-core.h>
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#include <linux/slab.h>
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#define DRIVER_DESC "WL1273 FM Radio Core"
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static struct i2c_device_id wl1273_driver_id_table[] = {
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{ WL1273_FM_DRIVER_NAME, 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, wl1273_driver_id_table);
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static int wl1273_core_remove(struct i2c_client *client)
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{
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struct wl1273_core *core = i2c_get_clientdata(client);
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dev_dbg(&client->dev, "%s\n", __func__);
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mfd_remove_devices(&client->dev);
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i2c_set_clientdata(client, NULL);
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kfree(core);
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return 0;
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}
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static int __devinit wl1273_core_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct wl1273_fm_platform_data *pdata = client->dev.platform_data;
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struct wl1273_core *core;
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struct mfd_cell *cell;
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int children = 0;
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int r = 0;
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dev_dbg(&client->dev, "%s\n", __func__);
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if (!pdata) {
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dev_err(&client->dev, "No platform data.\n");
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return -EINVAL;
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}
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if (!(pdata->children & WL1273_RADIO_CHILD)) {
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dev_err(&client->dev, "Cannot function without radio child.\n");
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return -EINVAL;
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}
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core = kzalloc(sizeof(*core), GFP_KERNEL);
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if (!core)
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return -ENOMEM;
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core->pdata = pdata;
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core->client = client;
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mutex_init(&core->lock);
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i2c_set_clientdata(client, core);
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dev_dbg(&client->dev, "%s: Have V4L2.\n", __func__);
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cell = &core->cells[children];
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cell->name = "wl1273_fm_radio";
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cell->platform_data = &core;
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cell->data_size = sizeof(core);
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children++;
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if (pdata->children & WL1273_CODEC_CHILD) {
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cell = &core->cells[children];
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dev_dbg(&client->dev, "%s: Have codec.\n", __func__);
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cell->name = "wl1273-codec";
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cell->platform_data = &core;
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cell->data_size = sizeof(core);
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children++;
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}
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dev_dbg(&client->dev, "%s: number of children: %d.\n",
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__func__, children);
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r = mfd_add_devices(&client->dev, -1, core->cells,
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children, NULL, 0);
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if (r)
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goto err;
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return 0;
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err:
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i2c_set_clientdata(client, NULL);
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pdata->free_resources();
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kfree(core);
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dev_dbg(&client->dev, "%s\n", __func__);
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return r;
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}
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static struct i2c_driver wl1273_core_driver = {
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.driver = {
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.name = WL1273_FM_DRIVER_NAME,
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},
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.probe = wl1273_core_probe,
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.id_table = wl1273_driver_id_table,
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.remove = __devexit_p(wl1273_core_remove),
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};
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static int __init wl1273_core_init(void)
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{
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int r;
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r = i2c_add_driver(&wl1273_core_driver);
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if (r) {
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pr_err(WL1273_FM_DRIVER_NAME
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": driver registration failed\n");
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return r;
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}
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return r;
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}
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static void __exit wl1273_core_exit(void)
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{
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i2c_del_driver(&wl1273_core_driver);
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}
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late_initcall(wl1273_core_init);
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module_exit(wl1273_core_exit);
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MODULE_AUTHOR("Matti Aaltonen <matti.j.aaltonen@nokia.com>");
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MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_LICENSE("GPL");
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