249 lines
6.5 KiB
C
249 lines
6.5 KiB
C
/*
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* radio-timb.c Timberdale FPGA Radio driver
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* Copyright (c) 2009 Intel Corporation
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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,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU 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., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/version.h>
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#include <linux/io.h>
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#include <media/v4l2-ioctl.h>
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#include <media/v4l2-device.h>
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#include <linux/platform_device.h>
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#include <linux/interrupt.h>
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#include <linux/slab.h>
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#include <linux/i2c.h>
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#include <media/timb_radio.h>
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#define DRIVER_NAME "timb-radio"
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struct timbradio {
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struct timb_radio_platform_data pdata;
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struct v4l2_subdev *sd_tuner;
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struct v4l2_subdev *sd_dsp;
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struct video_device video_dev;
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struct v4l2_device v4l2_dev;
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struct mutex lock;
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};
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static int timbradio_vidioc_querycap(struct file *file, void *priv,
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struct v4l2_capability *v)
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{
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strlcpy(v->driver, DRIVER_NAME, sizeof(v->driver));
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strlcpy(v->card, "Timberdale Radio", sizeof(v->card));
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snprintf(v->bus_info, sizeof(v->bus_info), "platform:"DRIVER_NAME);
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v->version = KERNEL_VERSION(0, 0, 1);
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v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
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return 0;
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}
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static int timbradio_vidioc_g_tuner(struct file *file, void *priv,
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struct v4l2_tuner *v)
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{
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struct timbradio *tr = video_drvdata(file);
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return v4l2_subdev_call(tr->sd_tuner, tuner, g_tuner, v);
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}
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static int timbradio_vidioc_s_tuner(struct file *file, void *priv,
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struct v4l2_tuner *v)
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{
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struct timbradio *tr = video_drvdata(file);
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return v4l2_subdev_call(tr->sd_tuner, tuner, s_tuner, v);
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}
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static int timbradio_vidioc_g_input(struct file *filp, void *priv,
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unsigned int *i)
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{
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*i = 0;
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return 0;
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}
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static int timbradio_vidioc_s_input(struct file *filp, void *priv,
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unsigned int i)
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{
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return i ? -EINVAL : 0;
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}
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static int timbradio_vidioc_g_audio(struct file *file, void *priv,
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struct v4l2_audio *a)
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{
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a->index = 0;
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strlcpy(a->name, "Radio", sizeof(a->name));
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a->capability = V4L2_AUDCAP_STEREO;
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return 0;
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}
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static int timbradio_vidioc_s_audio(struct file *file, void *priv,
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struct v4l2_audio *a)
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{
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return a->index ? -EINVAL : 0;
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}
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static int timbradio_vidioc_s_frequency(struct file *file, void *priv,
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struct v4l2_frequency *f)
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{
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struct timbradio *tr = video_drvdata(file);
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return v4l2_subdev_call(tr->sd_tuner, tuner, s_frequency, f);
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}
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static int timbradio_vidioc_g_frequency(struct file *file, void *priv,
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struct v4l2_frequency *f)
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{
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struct timbradio *tr = video_drvdata(file);
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return v4l2_subdev_call(tr->sd_tuner, tuner, g_frequency, f);
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}
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static int timbradio_vidioc_queryctrl(struct file *file, void *priv,
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struct v4l2_queryctrl *qc)
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{
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struct timbradio *tr = video_drvdata(file);
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return v4l2_subdev_call(tr->sd_dsp, core, queryctrl, qc);
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}
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static int timbradio_vidioc_g_ctrl(struct file *file, void *priv,
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struct v4l2_control *ctrl)
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{
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struct timbradio *tr = video_drvdata(file);
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return v4l2_subdev_call(tr->sd_dsp, core, g_ctrl, ctrl);
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}
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static int timbradio_vidioc_s_ctrl(struct file *file, void *priv,
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struct v4l2_control *ctrl)
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{
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struct timbradio *tr = video_drvdata(file);
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return v4l2_subdev_call(tr->sd_dsp, core, s_ctrl, ctrl);
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}
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static const struct v4l2_ioctl_ops timbradio_ioctl_ops = {
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.vidioc_querycap = timbradio_vidioc_querycap,
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.vidioc_g_tuner = timbradio_vidioc_g_tuner,
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.vidioc_s_tuner = timbradio_vidioc_s_tuner,
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.vidioc_g_frequency = timbradio_vidioc_g_frequency,
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.vidioc_s_frequency = timbradio_vidioc_s_frequency,
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.vidioc_g_input = timbradio_vidioc_g_input,
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.vidioc_s_input = timbradio_vidioc_s_input,
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.vidioc_g_audio = timbradio_vidioc_g_audio,
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.vidioc_s_audio = timbradio_vidioc_s_audio,
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.vidioc_queryctrl = timbradio_vidioc_queryctrl,
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.vidioc_g_ctrl = timbradio_vidioc_g_ctrl,
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.vidioc_s_ctrl = timbradio_vidioc_s_ctrl
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};
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static const struct v4l2_file_operations timbradio_fops = {
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.owner = THIS_MODULE,
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.unlocked_ioctl = video_ioctl2,
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};
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static int __devinit timbradio_probe(struct platform_device *pdev)
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{
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struct timb_radio_platform_data *pdata = pdev->dev.platform_data;
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struct timbradio *tr;
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int err;
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if (!pdata) {
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dev_err(&pdev->dev, "Platform data missing\n");
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err = -EINVAL;
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goto err;
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}
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tr = kzalloc(sizeof(*tr), GFP_KERNEL);
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if (!tr) {
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err = -ENOMEM;
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goto err;
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}
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tr->pdata = *pdata;
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mutex_init(&tr->lock);
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strlcpy(tr->video_dev.name, "Timberdale Radio",
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sizeof(tr->video_dev.name));
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tr->video_dev.fops = &timbradio_fops;
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tr->video_dev.ioctl_ops = &timbradio_ioctl_ops;
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tr->video_dev.release = video_device_release_empty;
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tr->video_dev.minor = -1;
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tr->video_dev.lock = &tr->lock;
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strlcpy(tr->v4l2_dev.name, DRIVER_NAME, sizeof(tr->v4l2_dev.name));
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err = v4l2_device_register(NULL, &tr->v4l2_dev);
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if (err)
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goto err_v4l2_dev;
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tr->video_dev.v4l2_dev = &tr->v4l2_dev;
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err = video_register_device(&tr->video_dev, VFL_TYPE_RADIO, -1);
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if (err) {
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dev_err(&pdev->dev, "Error reg video\n");
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goto err_video_req;
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}
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video_set_drvdata(&tr->video_dev, tr);
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platform_set_drvdata(pdev, tr);
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return 0;
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err_video_req:
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video_device_release_empty(&tr->video_dev);
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v4l2_device_unregister(&tr->v4l2_dev);
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err_v4l2_dev:
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kfree(tr);
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err:
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dev_err(&pdev->dev, "Failed to register: %d\n", err);
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return err;
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}
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static int __devexit timbradio_remove(struct platform_device *pdev)
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{
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struct timbradio *tr = platform_get_drvdata(pdev);
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video_unregister_device(&tr->video_dev);
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video_device_release_empty(&tr->video_dev);
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v4l2_device_unregister(&tr->v4l2_dev);
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kfree(tr);
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return 0;
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}
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static struct platform_driver timbradio_platform_driver = {
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.driver = {
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.name = DRIVER_NAME,
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.owner = THIS_MODULE,
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},
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.probe = timbradio_probe,
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.remove = timbradio_remove,
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};
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/*--------------------------------------------------------------------------*/
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static int __init timbradio_init(void)
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{
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return platform_driver_register(&timbradio_platform_driver);
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}
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static void __exit timbradio_exit(void)
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{
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platform_driver_unregister(&timbradio_platform_driver);
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}
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module_init(timbradio_init);
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module_exit(timbradio_exit);
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MODULE_DESCRIPTION("Timberdale Radio driver");
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MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>");
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MODULE_LICENSE("GPL v2");
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MODULE_ALIAS("platform:"DRIVER_NAME);
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