linux_dsm_epyc7002/drivers/media/radio/si4713/radio-platform-si4713.c
Linus Torvalds e6b5be2be4 Driver core patches for 3.19-rc1
Here's the set of driver core patches for 3.19-rc1.
 
 They are dominated by the removal of the .owner field in platform
 drivers.  They touch a lot of files, but they are "simple" changes, just
 removing a line in a structure.
 
 Other than that, a few minor driver core and debugfs changes.  There are
 some ath9k patches coming in through this tree that have been acked by
 the wireless maintainers as they relied on the debugfs changes.
 
 Everything has been in linux-next for a while.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core update from Greg KH:
 "Here's the set of driver core patches for 3.19-rc1.

  They are dominated by the removal of the .owner field in platform
  drivers.  They touch a lot of files, but they are "simple" changes,
  just removing a line in a structure.

  Other than that, a few minor driver core and debugfs changes.  There
  are some ath9k patches coming in through this tree that have been
  acked by the wireless maintainers as they relied on the debugfs
  changes.

  Everything has been in linux-next for a while"

* tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (324 commits)
  Revert "ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries"
  fs: debugfs: add forward declaration for struct device type
  firmware class: Deletion of an unnecessary check before the function call "vunmap"
  firmware loader: fix hung task warning dump
  devcoredump: provide a one-way disable function
  device: Add dev_<level>_once variants
  ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries
  ath: use seq_file api for ath9k debugfs files
  debugfs: add helper function to create device related seq_file
  drivers/base: cacheinfo: remove noisy error boot message
  Revert "core: platform: add warning if driver has no owner"
  drivers: base: support cpu cache information interface to userspace via sysfs
  drivers: base: add cpu_device_create to support per-cpu devices
  topology: replace custom attribute macros with standard DEVICE_ATTR*
  cpumask: factor out show_cpumap into separate helper function
  driver core: Fix unbalanced device reference in drivers_probe
  driver core: fix race with userland in device_add()
  sysfs/kernfs: make read requests on pre-alloc files use the buffer.
  sysfs/kernfs: allow attributes to request write buffer be pre-allocated.
  fs: sysfs: return EGBIG on write if offset is larger than file size
  ...
2014-12-14 16:10:09 -08:00

229 lines
6.9 KiB
C

/*
* drivers/media/radio/radio-si4713.c
*
* Platform Driver for Silicon Labs Si4713 FM Radio Transmitter:
*
* Copyright (c) 2008 Instituto Nokia de Tecnologia - INdT
* Contact: Eduardo Valentin <eduardo.valentin@nokia.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <linux/videodev2.h>
#include <linux/slab.h>
#include <media/v4l2-device.h>
#include <media/v4l2-common.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-fh.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-event.h>
#include "si4713.h"
/* module parameters */
static int radio_nr = -1; /* radio device minor (-1 ==> auto assign) */
module_param(radio_nr, int, 0);
MODULE_PARM_DESC(radio_nr,
"Minor number for radio device (-1 ==> auto assign)");
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Eduardo Valentin <eduardo.valentin@nokia.com>");
MODULE_DESCRIPTION("Platform driver for Si4713 FM Radio Transmitter");
MODULE_VERSION("0.0.1");
MODULE_ALIAS("platform:radio-si4713");
/* Driver state struct */
struct radio_si4713_device {
struct v4l2_device v4l2_dev;
struct video_device radio_dev;
struct mutex lock;
};
/* radio_si4713_fops - file operations interface */
static const struct v4l2_file_operations radio_si4713_fops = {
.owner = THIS_MODULE,
.open = v4l2_fh_open,
.release = v4l2_fh_release,
.poll = v4l2_ctrl_poll,
/* Note: locking is done at the subdev level in the i2c driver. */
.unlocked_ioctl = video_ioctl2,
};
/* Video4Linux Interface */
/* radio_si4713_querycap - query device capabilities */
static int radio_si4713_querycap(struct file *file, void *priv,
struct v4l2_capability *capability)
{
strlcpy(capability->driver, "radio-si4713", sizeof(capability->driver));
strlcpy(capability->card, "Silicon Labs Si4713 Modulator",
sizeof(capability->card));
strlcpy(capability->bus_info, "platform:radio-si4713",
sizeof(capability->bus_info));
capability->device_caps = V4L2_CAP_MODULATOR | V4L2_CAP_RDS_OUTPUT;
capability->capabilities = capability->device_caps | V4L2_CAP_DEVICE_CAPS;
return 0;
}
/*
* v4l2 ioctl call backs.
* we are just a wrapper for v4l2_sub_devs.
*/
static inline struct v4l2_device *get_v4l2_dev(struct file *file)
{
return &((struct radio_si4713_device *)video_drvdata(file))->v4l2_dev;
}
static int radio_si4713_g_modulator(struct file *file, void *p,
struct v4l2_modulator *vm)
{
return v4l2_device_call_until_err(get_v4l2_dev(file), 0, tuner,
g_modulator, vm);
}
static int radio_si4713_s_modulator(struct file *file, void *p,
const struct v4l2_modulator *vm)
{
return v4l2_device_call_until_err(get_v4l2_dev(file), 0, tuner,
s_modulator, vm);
}
static int radio_si4713_g_frequency(struct file *file, void *p,
struct v4l2_frequency *vf)
{
return v4l2_device_call_until_err(get_v4l2_dev(file), 0, tuner,
g_frequency, vf);
}
static int radio_si4713_s_frequency(struct file *file, void *p,
const struct v4l2_frequency *vf)
{
return v4l2_device_call_until_err(get_v4l2_dev(file), 0, tuner,
s_frequency, vf);
}
static long radio_si4713_default(struct file *file, void *p,
bool valid_prio, unsigned int cmd, void *arg)
{
return v4l2_device_call_until_err(get_v4l2_dev(file), 0, core,
ioctl, cmd, arg);
}
static struct v4l2_ioctl_ops radio_si4713_ioctl_ops = {
.vidioc_querycap = radio_si4713_querycap,
.vidioc_g_modulator = radio_si4713_g_modulator,
.vidioc_s_modulator = radio_si4713_s_modulator,
.vidioc_g_frequency = radio_si4713_g_frequency,
.vidioc_s_frequency = radio_si4713_s_frequency,
.vidioc_log_status = v4l2_ctrl_log_status,
.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
.vidioc_default = radio_si4713_default,
};
/* radio_si4713_vdev_template - video device interface */
static struct video_device radio_si4713_vdev_template = {
.fops = &radio_si4713_fops,
.name = "radio-si4713",
.release = video_device_release_empty,
.ioctl_ops = &radio_si4713_ioctl_ops,
.vfl_dir = VFL_DIR_TX,
};
/* Platform driver interface */
/* radio_si4713_pdriver_probe - probe for the device */
static int radio_si4713_pdriver_probe(struct platform_device *pdev)
{
struct radio_si4713_platform_data *pdata = pdev->dev.platform_data;
struct radio_si4713_device *rsdev;
struct v4l2_subdev *sd;
int rval = 0;
if (!pdata) {
dev_err(&pdev->dev, "Cannot proceed without platform data.\n");
rval = -EINVAL;
goto exit;
}
rsdev = devm_kzalloc(&pdev->dev, sizeof(*rsdev), GFP_KERNEL);
if (!rsdev) {
dev_err(&pdev->dev, "Failed to alloc video device.\n");
rval = -ENOMEM;
goto exit;
}
mutex_init(&rsdev->lock);
rval = v4l2_device_register(&pdev->dev, &rsdev->v4l2_dev);
if (rval) {
dev_err(&pdev->dev, "Failed to register v4l2 device.\n");
goto exit;
}
sd = i2c_get_clientdata(pdata->subdev);
rval = v4l2_device_register_subdev(&rsdev->v4l2_dev, sd);
if (rval) {
dev_err(&pdev->dev, "Cannot get v4l2 subdevice\n");
goto unregister_v4l2_dev;
}
rsdev->radio_dev = radio_si4713_vdev_template;
rsdev->radio_dev.v4l2_dev = &rsdev->v4l2_dev;
rsdev->radio_dev.ctrl_handler = sd->ctrl_handler;
/* Serialize all access to the si4713 */
rsdev->radio_dev.lock = &rsdev->lock;
video_set_drvdata(&rsdev->radio_dev, rsdev);
if (video_register_device(&rsdev->radio_dev, VFL_TYPE_RADIO, radio_nr)) {
dev_err(&pdev->dev, "Could not register video device.\n");
rval = -EIO;
goto unregister_v4l2_dev;
}
dev_info(&pdev->dev, "New device successfully probed\n");
goto exit;
unregister_v4l2_dev:
v4l2_device_unregister(&rsdev->v4l2_dev);
exit:
return rval;
}
/* radio_si4713_pdriver_remove - remove the device */
static int radio_si4713_pdriver_remove(struct platform_device *pdev)
{
struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
struct radio_si4713_device *rsdev;
rsdev = container_of(v4l2_dev, struct radio_si4713_device, v4l2_dev);
video_unregister_device(&rsdev->radio_dev);
v4l2_device_unregister(&rsdev->v4l2_dev);
return 0;
}
static struct platform_driver radio_si4713_pdriver = {
.driver = {
.name = "radio-si4713",
},
.probe = radio_si4713_pdriver_probe,
.remove = radio_si4713_pdriver_remove,
};
module_platform_driver(radio_si4713_pdriver);