[PATCHv4 6 of 8] FMTx: si4713: Add files to add radio interface for si4713

[Eduardo Valentin <eduardo.valentin@nokia.com>]

# HG changeset patch
# User Eduardo Valentin <eduardo.valentin@nokia.com>
# Date 1243414606 -10800
# Branch export
# Node ID 1abb96fdce05e1449faac2223e93056bacf389bd
# Parent  94b5043b692a6218a667326536d3d76a0c591307
This patch adds files which creates the radio interface
for si4713 FM transmitter devices.

Signed-off-by: Eduardo Valentin <eduardo.valentin@nokia.com>
---
 drivers/media/linux/radio/radio-si4713.c |  333 ++++++++++++++++++++++++++++++++++++
 drivers/media/linux/radio/radio-si4713.h |   49 ++++++
 2 files changed, 382 insertions(+), 0 deletions(-)
 create mode 100644 drivers/media/linux/radio/radio-si4713.c
 create mode 100644 drivers/media/linux/radio/radio-si4713.h

diff -r 94b5043b692a -r 1abb96fdce05 linux/drivers/media/linux/radio/radio-si4713.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/linux/drivers/media/linux/radio/radio-si4713.c	Wed May 27 11:56:46 2009 +0300
@@ -0,0 +1,333 @@
+/*
+ * drivers/media/linux/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/version.h>
+#include <linux/platform_device.h>
+#include <linux/i2c.h>
+#include <linux/videodev2.h>
+#include <media/linux/v4l2-device.h>
+#include <media/linux/v4l2-common.h>
+#include <media/linux/v4l2-ioctl.h>
+
+#include "radio-si4713.h"
+#include "si4713.h"
+
+/* module parameters */
+static int radio_nr = -1;	/* radio device minor (-1 ==> auto assign) */
+
+/* radio_si4713_fops - file operations interface */
+static const struct v4l2_file_operations radio_si4713_fops = {
+	.owner		= THIS_MODULE,
+	.ioctl		= video_ioctl2,
+};
+
+/* Video4Linux Interface */
+static int radio_si4713_vidioc_g_audio(struct file *file, void *priv,
+					struct v4l2_audio *audio)
+{
+	if (audio->index > 1)
+		return -EINVAL;
+
+	strncpy(audio->name, "Radio", 32);
+	audio->capability = V4L2_AUDCAP_STEREO;
+
+	return 0;
+}
+
+static int radio_si4713_vidioc_s_audio(struct file *file, void *priv,
+					struct v4l2_audio *audio)
+{
+	if (audio->index != 0)
+		return -EINVAL;
+
+	return 0;
+}
+
+static int radio_si4713_vidioc_g_input(struct file *file, void *priv,
+					unsigned int *i)
+{
+	*i = 0;
+
+	return 0;
+}
+
+static int radio_si4713_vidioc_s_input(struct file *file, void *priv,
+					unsigned int i)
+{
+	if (i != 0)
+		return -EINVAL;
+
+	return 0;
+}
+
+/* radio_si4713_vidioc_querycap - query device capabilities */
+static int radio_si4713_vidioc_querycap(struct file *file, void *priv,
+					struct v4l2_capability *capability)
+{
+	struct radio_si4713_device *rsdev;
+
+	rsdev = video_get_drvdata(video_devdata(file));
+
+	strlcpy(capability->driver, "radio-si4713", sizeof(capability->driver));
+	strlcpy(capability->card, "Silicon Labs Si4713 FM Radio Transmitter",
+				sizeof(capability->card));
+	capability->capabilities = V4L2_CAP_TUNER;
+
+	return 0;
+}
+
+/* radio_si4713_vidioc_queryctrl - enumerate control items */
+static int radio_si4713_vidioc_queryctrl(struct file *file, void *priv,
+						struct v4l2_queryctrl *qc)
+{
+
+	/* Must be sorted from low to high control ID! */
+	static const u32 user_ctrls[] = {
+		V4L2_CID_USER_CLASS,
+		V4L2_CID_AUDIO_VOLUME,
+		V4L2_CID_AUDIO_BALANCE,
+		V4L2_CID_AUDIO_BASS,
+		V4L2_CID_AUDIO_TREBLE,
+		V4L2_CID_AUDIO_LOUDNESS,
+		V4L2_CID_AUDIO_MUTE,
+		0
+	};
+
+	/* Must be sorted from low to high control ID! */
+	static const u32 fmtx_ctrls[] = {
+		V4L2_CID_FMTX_CLASS,
+		V4L2_CID_RDS_ENABLED,
+		V4L2_CID_RDS_PI,
+		V4L2_CID_RDS_PTY,
+		V4L2_CID_RDS_PS_NAME,
+		V4L2_CID_RDS_RADIO_TEXT,
+		V4L2_CID_AUDIO_LIMITER_ENABLED,
+		V4L2_CID_AUDIO_LIMITER_RELEASE_TIME,
+		V4L2_CID_AUDIO_LIMITER_DEVIATION,
+		V4L2_CID_AUDIO_COMPRESSION_ENABLED,
+		V4L2_CID_AUDIO_COMPRESSION_GAIN,
+		V4L2_CID_AUDIO_COMPRESSION_THRESHOLD,
+		V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME,
+		V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME,
+		V4L2_CID_PILOT_TONE_ENABLED,
+		V4L2_CID_PILOT_TONE_DEVIATION,
+		V4L2_CID_PILOT_TONE_FREQUENCY,
+		V4L2_CID_PREEMPHASIS,
+		V4L2_CID_TUNE_POWER_LEVEL,
+		V4L2_CID_TUNE_ANTENNA_CAPACITOR,
+		0
+	};
+	static const u32 *ctrl_classes[] = {
+		user_ctrls,
+		fmtx_ctrls,
+		NULL
+	};
+	struct radio_si4713_device *rsdev;
+
+	rsdev = video_get_drvdata(video_devdata(file));
+
+	qc->id = v4l2_ctrl_next(ctrl_classes, qc->id);
+	if (qc->id == 0)
+		return -EINVAL;
+
+	if (qc->id == V4L2_CID_USER_CLASS || qc->id == V4L2_CID_FMTX_CLASS)
+		return v4l2_ctrl_query_fill(qc, 0, 0, 0, 0);
+
+	return v4l2_device_call_until_err(&rsdev->v4l2_dev, 0, core,
+						queryctrl, qc);
+}
+
+
+/*
+ * radio_si4713_vidioc_template - Produce a v4l2 vidioc call back.
+ * Can be used because we are just a wrapper for v4l2_sub_devs.
+ */
+#define radio_si4713_vidioc_template(type, callback, arg_type)		\
+static int radio_si4713_vidioc_##callback(struct file *file, void *p,	\
+						arg_type a)		\
+{									\
+	struct radio_si4713_device *rsdev;				\
+									\
+	rsdev = video_get_drvdata(video_devdata(file));			\
+									\
+	return v4l2_device_call_until_err(&rsdev->v4l2_dev, 0, type,	\
+							callback, a);	\
+}
+
+radio_si4713_vidioc_template(core, g_ext_ctrls, struct v4l2_ext_controls *)
+radio_si4713_vidioc_template(core, s_ext_ctrls, struct v4l2_ext_controls *)
+radio_si4713_vidioc_template(core, g_ctrl, struct v4l2_control *)
+radio_si4713_vidioc_template(core, s_ctrl, struct v4l2_control *)
+radio_si4713_vidioc_template(tuner, g_tuner, struct v4l2_tuner *)
+radio_si4713_vidioc_template(tuner, s_tuner, struct v4l2_tuner *)
+radio_si4713_vidioc_template(tuner, g_frequency, struct v4l2_frequency *)
+radio_si4713_vidioc_template(tuner, s_frequency, struct v4l2_frequency *)
+
+static struct v4l2_ioctl_ops radio_si4713_ioctl_ops = {
+	.vidioc_g_input		= radio_si4713_vidioc_g_input,
+	.vidioc_s_input		= radio_si4713_vidioc_s_input,
+	.vidioc_g_audio		= radio_si4713_vidioc_g_audio,
+	.vidioc_s_audio		= radio_si4713_vidioc_s_audio,
+	.vidioc_querycap	= radio_si4713_vidioc_querycap,
+	.vidioc_queryctrl	= radio_si4713_vidioc_queryctrl,
+	.vidioc_g_ext_ctrls	= radio_si4713_vidioc_g_ext_ctrls,
+	.vidioc_s_ext_ctrls	= radio_si4713_vidioc_s_ext_ctrls,
+	.vidioc_g_ctrl		= radio_si4713_vidioc_g_ctrl,
+	.vidioc_s_ctrl		= radio_si4713_vidioc_s_ctrl,
+	.vidioc_g_tuner		= radio_si4713_vidioc_g_tuner,
+	.vidioc_s_tuner		= radio_si4713_vidioc_s_tuner,
+	.vidioc_g_frequency	= radio_si4713_vidioc_g_frequency,
+	.vidioc_s_frequency	= radio_si4713_vidioc_s_frequency,
+};
+
+/* 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,
+	.ioctl_ops		= &radio_si4713_ioctl_ops,
+};
+
+/* 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->platform_data;
+	struct radio_si4713_device *rsdev;
+	struct i2c_adapter *adapter;
+	struct v4l2_subdev *sd;
+	int rval = 0;
+
+	if (!pdata) {
+		dev_err(&pdev->dev, "Can not proceed without platform data.\n");
+		rval = -EINVAL;
+		goto exit;
+	}
+
+	rsdev = kzalloc(sizeof *rsdev, GFP_KERNEL);
+	if (!rsdev) {
+		dev_err(&pdev->dev, "Failed to alloc video device.\n");
+		rval = -ENOMEM;
+		goto exit;
+	}
+
+	rval = v4l2_device_register(&pdev->dev, &rsdev->v4l2_dev);
+	if (rval) {
+		dev_err(&pdev->dev, "Failed to register v4l2 device.\n");
+		goto free_rsdev;
+	}
+
+	adapter = i2c_get_adapter(pdata->i2c_bus);
+	if (!adapter) {
+		dev_err(&pdev->dev, "Can not get i2c adapter %d\n",
+							pdata->i2c_bus);
+		rval = -ENODEV;
+		goto unregister_v4l2_dev;
+	}
+
+	sd = v4l2_i2c_new_subdev_board(&rsdev->v4l2_dev, adapter, "si4713_i2c",
+				"si4713", SI4713_I2C_ADDR_BUSEN_HIGH,
+				pdata->irq, pdata->subdev_pdata);
+	if (!sd) {
+		dev_err(&pdev->dev, "Can not get v4l2 subdevice\n");
+		rval = -ENODEV;
+		goto unregister_v4l2_dev;
+	}
+
+	rsdev->radio_dev = video_device_alloc();
+	if (!rsdev->radio_dev) {
+		dev_err(&pdev->dev, "Failed to alloc video device.\n");
+		rval = -ENOMEM;
+		goto unregister_v4l2_dev;
+	}
+
+	memcpy(rsdev->radio_dev, &radio_si4713_vdev_template,
+			sizeof(radio_si4713_vdev_template));
+	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 free_vdev;
+	}
+	dev_info(&pdev->dev, "New device successfully probed\n");
+
+	goto exit;
+
+free_vdev:
+	video_device_release(rsdev->radio_dev);
+unregister_v4l2_dev:
+	v4l2_device_unregister(&rsdev->v4l2_dev);
+free_rsdev:
+	kfree(rsdev);
+exit:
+	return rval;
+}
+
+/* radio_si4713_pdriver_remove - remove the device */
+static int __exit radio_si4713_pdriver_remove(struct platform_device *pdev)
+{
+	struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
+	struct radio_si4713_device *rsdev = container_of(v4l2_dev,
+						struct radio_si4713_device,
+						v4l2_dev);
+
+	video_unregister_device(rsdev->radio_dev);
+	v4l2_device_unregister(&rsdev->v4l2_dev);
+	kfree(rsdev);
+
+	return 0;
+}
+
+static struct platform_driver radio_si4713_pdriver = {
+	.driver		= {
+		.name	= "radio-si4713",
+	},
+	.probe		= radio_si4713_pdriver_probe,
+	.remove         = __exit_p(radio_si4713_pdriver_remove),
+};
+
+/* Module Interface */
+static int __init radio_si4713_module_init(void)
+{
+	return platform_driver_register(&radio_si4713_pdriver);
+}
+
+static void __exit radio_si4713_module_exit(void)
+{
+	platform_driver_unregister(&radio_si4713_pdriver);
+}
+
+module_init(radio_si4713_module_init);
+module_exit(radio_si4713_module_exit);
+
+module_param(radio_nr, int, 0);
+MODULE_PARM_DESC(radio_nr,
+		 "Minor number for radio device (-1 ==> auto assign)");
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Eduardo Valentin <eduardo.valentin@nokia.com>");
+MODULE_DESCRIPTION("Platform driver for Si4713 FM Radio Transmitter");
+MODULE_VERSION("0.0.1");
diff -r 94b5043b692a -r 1abb96fdce05 linux/drivers/media/linux/radio/radio-si4713.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/linux/drivers/media/linux/radio/radio-si4713.h	Wed May 27 11:56:46 2009 +0300
@@ -0,0 +1,49 @@
+/*
+ * drivers/media/linux/radio/radio-si4713.h
+ *
+ * Property and commands definitions for Si4713 radio transmitter chip.
+ *
+ * Copyright (c) 2008 Instituto Nokia de Tecnologia - INdT
+ * Contact: Eduardo Valentin <eduardo.valentin@nokia.com>
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ *
+ */
+
+#ifndef RADIO_SI4713_H
+#define RADIO_SI4713_H
+
+#include <linux/i2c.h>
+#include <media/linux/v4l2-device.h>
+
+#define SI4713_NAME "radio-si4713"
+
+/* The SI4713 I2C sensor chip has a fixed slave address of 0xc6. */
+#define SI4713_I2C_ADDR_BUSEN_HIGH	0x63
+#define SI4713_I2C_ADDR_BUSEN_LOW	0x11
+
+/*
+ * Platform dependent definition
+ */
+struct si4713_platform_data {
+	/* Set power state, zero is off, non-zero is on. */
+	int (*set_power)(int power);
+};
+
+/*
+ * Platform driver device state struct
+ */
+struct radio_si4713_device {
+	struct v4l2_device		v4l2_dev;
+	struct video_device		*radio_dev;
+};
+
+struct radio_si4713_platform_data {
+	int i2c_bus;
+	int irq;
+	void *subdev_pdata;
+};
+
+#endif /* ifndef RADIO_SI4713_H*/