diff options
author | Matti Aaltonen <matti.j.aaltonen@nokia.com> | 2010-12-10 17:41:33 +0300 |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2010-12-29 13:17:02 +0300 |
commit | 383268a8e282fb549dabe3a33ccafc9434ab6006 (patch) | |
tree | e4f4f03c0a609086f43860da1da4d7051f86bcb6 /drivers | |
parent | 00765f16f116b45aa67de306ac923ed4ba262bf9 (diff) | |
download | linux-383268a8e282fb549dabe3a33ccafc9434ab6006.tar.xz |
[media] MFD: WL1273 FM Radio: MFD driver for the FM radio
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>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/mfd/Kconfig | 10 | ||||
-rw-r--r-- | drivers/mfd/Makefile | 1 | ||||
-rw-r--r-- | drivers/mfd/wl1273-core.c | 148 |
3 files changed, 159 insertions, 0 deletions
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index 3a1493b8b5e5..05ccab6fa919 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -606,6 +606,16 @@ config MFD_VX855 VIA VX855/VX875 south bridge. You will need to enable the vx855_spi and/or vx855_gpio drivers for this to do anything useful. +config MFD_WL1273_CORE + tristate + depends on I2C + select MFD_CORE + default n + help + This is the core driver for the TI WL1273 FM radio. This MFD + driver connects the radio-wl1273 V4L2 module and the wl1273 + audio codec. + endif # MFD_SUPPORT menu "Multimedia Capabilities Port drivers" diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index f54b3659abbb..ae2f9153174a 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -81,3 +81,4 @@ obj-$(CONFIG_MFD_JANZ_CMODIO) += janz-cmodio.o obj-$(CONFIG_MFD_JZ4740_ADC) += jz4740-adc.o obj-$(CONFIG_MFD_TPS6586X) += tps6586x.o obj-$(CONFIG_MFD_VX855) += vx855.o +obj-$(CONFIG_MFD_WL1273_CORE) += wl1273-core.o diff --git a/drivers/mfd/wl1273-core.c b/drivers/mfd/wl1273-core.c new file mode 100644 index 000000000000..d2ecc2435736 --- /dev/null +++ b/drivers/mfd/wl1273-core.c @@ -0,0 +1,148 @@ +/* + * 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"); |