[deliverable/linux.git] / drivers / media / radio / radio-timb.c

/*
 * radio-timb.c Timberdale FPGA Radio driver
 * Copyright (c) 2009 Intel Corporation
 *
 * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/io.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-event.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/platform_data/media/timb_radio.h>

#define DRIVER_NAME "timb-radio"

struct timbradio {
	struct timb_radio_platform_data	pdata;
	struct v4l2_subdev	*sd_tuner;
	struct v4l2_subdev	*sd_dsp;
	struct video_device	video_dev;
	struct v4l2_device	v4l2_dev;
	struct mutex		lock;
};


static int timbradio_vidioc_querycap(struct file *file, void  *priv,
	struct v4l2_capability *v)
{
	strlcpy(v->driver, DRIVER_NAME, sizeof(v->driver));
	strlcpy(v->card, "Timberdale Radio", sizeof(v->card));
	snprintf(v->bus_info, sizeof(v->bus_info), "platform:"DRIVER_NAME);
	v->device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
	v->capabilities = v->device_caps | V4L2_CAP_DEVICE_CAPS;
	return 0;
}

static int timbradio_vidioc_g_tuner(struct file *file, void *priv,
	struct v4l2_tuner *v)
{
	struct timbradio *tr = video_drvdata(file);
	return v4l2_subdev_call(tr->sd_tuner, tuner, g_tuner, v);
}

static int timbradio_vidioc_s_tuner(struct file *file, void *priv,
	const struct v4l2_tuner *v)
{
	struct timbradio *tr = video_drvdata(file);
	return v4l2_subdev_call(tr->sd_tuner, tuner, s_tuner, v);
}

static int timbradio_vidioc_s_frequency(struct file *file, void *priv,
	const struct v4l2_frequency *f)
{
	struct timbradio *tr = video_drvdata(file);
	return v4l2_subdev_call(tr->sd_tuner, tuner, s_frequency, f);
}

static int timbradio_vidioc_g_frequency(struct file *file, void *priv,
	struct v4l2_frequency *f)
{
	struct timbradio *tr = video_drvdata(file);
	return v4l2_subdev_call(tr->sd_tuner, tuner, g_frequency, f);
}

static const struct v4l2_ioctl_ops timbradio_ioctl_ops = {
	.vidioc_querycap	= timbradio_vidioc_querycap,
	.vidioc_g_tuner		= timbradio_vidioc_g_tuner,
	.vidioc_s_tuner		= timbradio_vidioc_s_tuner,
	.vidioc_g_frequency	= timbradio_vidioc_g_frequency,
	.vidioc_s_frequency	= timbradio_vidioc_s_frequency,
	.vidioc_log_status      = v4l2_ctrl_log_status,
	.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
	.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
};

static const struct v4l2_file_operations timbradio_fops = {
	.owner		= THIS_MODULE,
	.open		= v4l2_fh_open,
	.release	= v4l2_fh_release,
	.poll		= v4l2_ctrl_poll,
	.unlocked_ioctl	= video_ioctl2,
};

static int timbradio_probe(struct platform_device *pdev)
{
	struct timb_radio_platform_data *pdata = pdev->dev.platform_data;
	struct timbradio *tr;
	int err;

	if (!pdata) {
		dev_err(&pdev->dev, "Platform data missing\n");
		err = -EINVAL;
		goto err;
	}

	tr = devm_kzalloc(&pdev->dev, sizeof(*tr), GFP_KERNEL);
	if (!tr) {
		err = -ENOMEM;
		goto err;
	}

	tr->pdata = *pdata;
	mutex_init(&tr->lock);

	strlcpy(tr->video_dev.name, "Timberdale Radio",
		sizeof(tr->video_dev.name));
	tr->video_dev.fops = &timbradio_fops;
	tr->video_dev.ioctl_ops = &timbradio_ioctl_ops;
	tr->video_dev.release = video_device_release_empty;
	tr->video_dev.minor = -1;
	tr->video_dev.lock = &tr->lock;

	strlcpy(tr->v4l2_dev.name, DRIVER_NAME, sizeof(tr->v4l2_dev.name));
	err = v4l2_device_register(NULL, &tr->v4l2_dev);
	if (err)
		goto err;

	tr->video_dev.v4l2_dev = &tr->v4l2_dev;

	tr->sd_tuner = v4l2_i2c_new_subdev_board(&tr->v4l2_dev,
		i2c_get_adapter(pdata->i2c_adapter), pdata->tuner, NULL);
	tr->sd_dsp = v4l2_i2c_new_subdev_board(&tr->v4l2_dev,
		i2c_get_adapter(pdata->i2c_adapter), pdata->dsp, NULL);
	if (tr->sd_tuner == NULL || tr->sd_dsp == NULL) {
		err = -ENODEV;
		goto err_video_req;
	}

	tr->v4l2_dev.ctrl_handler = tr->sd_dsp->ctrl_handler;

	err = video_register_device(&tr->video_dev, VFL_TYPE_RADIO, -1);
	if (err) {
		dev_err(&pdev->dev, "Error reg video\n");
		goto err_video_req;
	}

	video_set_drvdata(&tr->video_dev, tr);

	platform_set_drvdata(pdev, tr);
	return 0;

err_video_req:
	v4l2_device_unregister(&tr->v4l2_dev);
err:
	dev_err(&pdev->dev, "Failed to register: %d\n", err);

	return err;
}

static int timbradio_remove(struct platform_device *pdev)
{
	struct timbradio *tr = platform_get_drvdata(pdev);

	video_unregister_device(&tr->video_dev);
	v4l2_device_unregister(&tr->v4l2_dev);
	return 0;
}

static struct platform_driver timbradio_platform_driver = {
	.driver = {
		.name	= DRIVER_NAME,
	},
	.probe		= timbradio_probe,
	.remove		= timbradio_remove,
};

module_platform_driver(timbradio_platform_driver);

MODULE_DESCRIPTION("Timberdale Radio driver");
MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>");
MODULE_LICENSE("GPL v2");
MODULE_VERSION("0.0.2");
MODULE_ALIAS("platform:"DRIVER_NAME);
Commit	Line	Data
d44d1f3b RR	1	/*
	2	* radio-timb.c Timberdale FPGA Radio driver
	3	* Copyright (c) 2009 Intel Corporation
	4	*
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License version 2 as
	7	* published by the Free Software Foundation.
	8	*
	9	* This program is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
	13	*
	14	* You should have received a copy of the GNU General Public License
	15	* along with this program; if not, write to the Free Software
	16	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	17	*/
	18
d44d1f3b RR	19	#include <linux/io.h>
	20	#include <media/v4l2-ioctl.h>
	21	#include <media/v4l2-device.h>
46821b1d HV	22	#include <media/v4l2-ctrls.h>
46821b1d HV	23	#include <media/v4l2-event.h>
d44d1f3b RR	24	#include <linux/platform_device.h>
d44d1f3b RR	25	#include <linux/interrupt.h>
5a0e3ad6	26	#include <linux/slab.h>
d44d1f3b	27	#include <linux/i2c.h>
7a707b89	28	#include <linux/module.h>
eb4b0ec7	29	#include <linux/platform_data/media/timb_radio.h>
d44d1f3b RR	30
	31	#define DRIVER_NAME "timb-radio"
	32
	33	struct timbradio {
	34	struct timb_radio_platform_data pdata;
	35	struct v4l2_subdev *sd_tuner;
	36	struct v4l2_subdev *sd_dsp;
	37	struct video_device video_dev;
	38	struct v4l2_device v4l2_dev;
4f68775b	39	struct mutex lock;
d44d1f3b RR	40	};
	41
	42
	43	static int timbradio_vidioc_querycap(struct file file, void priv,
	44	struct v4l2_capability *v)
	45	{
	46	strlcpy(v->driver, DRIVER_NAME, sizeof(v->driver));
	47	strlcpy(v->card, "Timberdale Radio", sizeof(v->card));
	48	snprintf(v->bus_info, sizeof(v->bus_info), "platform:"DRIVER_NAME);
d020f839 HV	49	v->device_caps = V4L2_CAP_TUNER \| V4L2_CAP_RADIO;
d020f839 HV	50	v->capabilities = v->device_caps \| V4L2_CAP_DEVICE_CAPS;
d44d1f3b RR	51	return 0;
	52	}
	53
	54	static int timbradio_vidioc_g_tuner(struct file file, void priv,
	55	struct v4l2_tuner *v)
	56	{
	57	struct timbradio *tr = video_drvdata(file);
	58	return v4l2_subdev_call(tr->sd_tuner, tuner, g_tuner, v);
	59	}
	60
	61	static int timbradio_vidioc_s_tuner(struct file file, void priv,
2f73c7c5	62	const struct v4l2_tuner *v)
d44d1f3b RR	63	{
	64	struct timbradio *tr = video_drvdata(file);
	65	return v4l2_subdev_call(tr->sd_tuner, tuner, s_tuner, v);
	66	}
	67
d44d1f3b	68	static int timbradio_vidioc_s_frequency(struct file file, void priv,
b530a447	69	const struct v4l2_frequency *f)
d44d1f3b RR	70	{
	71	struct timbradio *tr = video_drvdata(file);
	72	return v4l2_subdev_call(tr->sd_tuner, tuner, s_frequency, f);
	73	}
	74
	75	static int timbradio_vidioc_g_frequency(struct file file, void priv,
	76	struct v4l2_frequency *f)
	77	{
	78	struct timbradio *tr = video_drvdata(file);
	79	return v4l2_subdev_call(tr->sd_tuner, tuner, g_frequency, f);
	80	}
	81
d44d1f3b RR	82	static const struct v4l2_ioctl_ops timbradio_ioctl_ops = {
	83	.vidioc_querycap = timbradio_vidioc_querycap,
	84	.vidioc_g_tuner = timbradio_vidioc_g_tuner,
	85	.vidioc_s_tuner = timbradio_vidioc_s_tuner,
	86	.vidioc_g_frequency = timbradio_vidioc_g_frequency,
	87	.vidioc_s_frequency = timbradio_vidioc_s_frequency,
46821b1d HV	88	.vidioc_log_status = v4l2_ctrl_log_status,
	89	.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
	90	.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
d44d1f3b RR	91	};
	92
	93	static const struct v4l2_file_operations timbradio_fops = {
	94	.owner = THIS_MODULE,
46821b1d HV	95	.open = v4l2_fh_open,
	96	.release = v4l2_fh_release,
	97	.poll = v4l2_ctrl_poll,
4f68775b	98	.unlocked_ioctl = video_ioctl2,
d44d1f3b RR	99	};
d44d1f3b RR	100
4c62e976	101	static int timbradio_probe(struct platform_device *pdev)
d44d1f3b	102	{
3271d382	103	struct timb_radio_platform_data *pdata = pdev->dev.platform_data;
d44d1f3b RR	104	struct timbradio *tr;
	105	int err;
	106
	107	if (!pdata) {
	108	dev_err(&pdev->dev, "Platform data missing\n");
	109	err = -EINVAL;
	110	goto err;
	111	}
	112
2f20c490	113	tr = devm_kzalloc(&pdev->dev, sizeof(*tr), GFP_KERNEL);
d44d1f3b RR	114	if (!tr) {
	115	err = -ENOMEM;
	116	goto err;
	117	}
	118
	119	tr->pdata = *pdata;
4f68775b	120	mutex_init(&tr->lock);
d44d1f3b RR	121
	122	strlcpy(tr->video_dev.name, "Timberdale Radio",
	123	sizeof(tr->video_dev.name));
	124	tr->video_dev.fops = &timbradio_fops;
	125	tr->video_dev.ioctl_ops = &timbradio_ioctl_ops;
	126	tr->video_dev.release = video_device_release_empty;
	127	tr->video_dev.minor = -1;
4f68775b	128	tr->video_dev.lock = &tr->lock;
d44d1f3b RR	129
	130	strlcpy(tr->v4l2_dev.name, DRIVER_NAME, sizeof(tr->v4l2_dev.name));
	131	err = v4l2_device_register(NULL, &tr->v4l2_dev);
	132	if (err)
2f20c490	133	goto err;
d44d1f3b RR	134
	135	tr->video_dev.v4l2_dev = &tr->v4l2_dev;
	136
5bd8d2ab HV	137	tr->sd_tuner = v4l2_i2c_new_subdev_board(&tr->v4l2_dev,
	138	i2c_get_adapter(pdata->i2c_adapter), pdata->tuner, NULL);
	139	tr->sd_dsp = v4l2_i2c_new_subdev_board(&tr->v4l2_dev,
	140	i2c_get_adapter(pdata->i2c_adapter), pdata->dsp, NULL);
44b0c738 JL	141	if (tr->sd_tuner == NULL \|\| tr->sd_dsp == NULL) {
44b0c738 JL	142	err = -ENODEV;
5bd8d2ab	143	goto err_video_req;
44b0c738	144	}
5bd8d2ab HV	145
	146	tr->v4l2_dev.ctrl_handler = tr->sd_dsp->ctrl_handler;
	147
d44d1f3b RR	148	err = video_register_device(&tr->video_dev, VFL_TYPE_RADIO, -1);
	149	if (err) {
	150	dev_err(&pdev->dev, "Error reg video\n");
	151	goto err_video_req;
	152	}
	153
	154	video_set_drvdata(&tr->video_dev, tr);
	155
	156	platform_set_drvdata(pdev, tr);
	157	return 0;
	158
	159	err_video_req:
d44d1f3b	160	v4l2_device_unregister(&tr->v4l2_dev);
d44d1f3b RR	161	err:
	162	dev_err(&pdev->dev, "Failed to register: %d\n", err);
	163
	164	return err;
	165	}
	166
4c62e976	167	static int timbradio_remove(struct platform_device *pdev)
d44d1f3b RR	168	{
	169	struct timbradio *tr = platform_get_drvdata(pdev);
	170
	171	video_unregister_device(&tr->video_dev);
d44d1f3b	172	v4l2_device_unregister(&tr->v4l2_dev);
d44d1f3b RR	173	return 0;
	174	}
	175
	176	static struct platform_driver timbradio_platform_driver = {
	177	.driver = {
	178	.name = DRIVER_NAME,
d44d1f3b RR	179	},
d44d1f3b RR	180	.probe = timbradio_probe,
4c62e976	181	.remove = timbradio_remove,
d44d1f3b RR	182	};
d44d1f3b RR	183
1d6629b1	184	module_platform_driver(timbradio_platform_driver);
d44d1f3b RR	185
	186	MODULE_DESCRIPTION("Timberdale Radio driver");
	187	MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>");
	188	MODULE_LICENSE("GPL v2");
29834c1a	189	MODULE_VERSION("0.0.2");
d44d1f3b	190	MODULE_ALIAS("platform:"DRIVER_NAME);