dirty fix to merging

1 files changed, 662 insertions, 0 deletions

diff --git a/drivers/media/radio/radio-mr800.c b/drivers/media/radio/radio-mr800.c
new file mode 100644
index 00000000..a860a72a
--- /dev/null
+++ b/drivers/media/radio/radio-mr800.c
@@ -0,0 +1,662 @@
+/*
+ * A driver for the AverMedia MR 800 USB FM radio. This device plugs
+ * into both the USB and an analog audio input, so this thing
+ * only deals with initialization and frequency setting, the
+ * audio data has to be handled by a sound driver.
+ *
+ * Copyright (c) 2008 Alexey Klimov <klimov.linux@gmail.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
+ */
+
+/*
+ * Big thanks to authors and contributors of dsbr100.c and radio-si470x.c
+ *
+ * When work was looked pretty good, i discover this:
+ * http://av-usbradio.sourceforge.net/index.php
+ * http://sourceforge.net/projects/av-usbradio/
+ * Latest release of theirs project was in 2005.
+ * Probably, this driver could be improved through using their
+ * achievements (specifications given).
+ * Also, Faidon Liambotis <paravoid@debian.org> wrote nice driver for this radio
+ * in 2007. He allowed to use his driver to improve current mr800 radio driver.
+ * http://kerneltrap.org/mailarchive/linux-usb-devel/2007/10/11/342492
+ *
+ * Version 0.01:	First working version.
+ * 			It's required to blacklist AverMedia USB Radio
+ * 			in usbhid/hid-quirks.c
+ * Version 0.10:	A lot of cleanups and fixes: unpluging the device,
+ * 			few mutex locks were added, codinstyle issues, etc.
+ * 			Added stereo support. Thanks to
+ * 			Douglas Schilling Landgraf <dougsland@gmail.com> and
+ * 			David Ellingsworth <david@identd.dyndns.org>
+ * 			for discussion, help and support.
+ * Version 0.11:	Converted to v4l2_device.
+ *
+ * Many things to do:
+ * 	- Correct power management of device (suspend & resume)
+ * 	- Add code for scanning and smooth tuning
+ * 	- Add code for sensitivity value
+ * 	- Correct mistakes
+ * 	- In Japan another FREQ_MIN and FREQ_MAX
+ */
+
+/* kernel includes */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/input.h>
+#include <linux/videodev2.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-ioctl.h>
+#include <linux/usb.h>
+#include <linux/mutex.h>
+
+/* driver and module definitions */
+#define DRIVER_AUTHOR "Alexey Klimov <klimov.linux@gmail.com>"
+#define DRIVER_DESC "AverMedia MR 800 USB FM radio driver"
+#define DRIVER_VERSION "0.1.2"
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRIVER_VERSION);
+
+#define USB_AMRADIO_VENDOR 0x07ca
+#define USB_AMRADIO_PRODUCT 0xb800
+
+/* dev_warn macro with driver name */
+#define MR800_DRIVER_NAME "radio-mr800"
+#define amradio_dev_warn(dev, fmt, arg...)				\
+		dev_warn(dev, MR800_DRIVER_NAME " - " fmt, ##arg)
+
+#define amradio_dev_err(dev, fmt, arg...) \
+		dev_err(dev, MR800_DRIVER_NAME " - " fmt, ##arg)
+
+/* Probably USB_TIMEOUT should be modified in module parameter */
+#define BUFFER_LENGTH 8
+#define USB_TIMEOUT 500
+
+/* Frequency limits in MHz -- these are European values.  For Japanese
+devices, that would be 76 and 91.  */
+#define FREQ_MIN  87.5
+#define FREQ_MAX 108.0
+#define FREQ_MUL 16000
+
+/*
+ * Commands that device should understand
+ * List isn't full and will be updated with implementation of new functions
+ */
+#define AMRADIO_SET_FREQ	0xa4
+#define AMRADIO_SET_MUTE	0xab
+#define AMRADIO_SET_MONO	0xae
+
+/* Comfortable defines for amradio_set_mute */
+#define AMRADIO_START		0x00
+#define AMRADIO_STOP		0x01
+
+/* Comfortable defines for amradio_set_stereo */
+#define WANT_STEREO		0x00
+#define WANT_MONO		0x01
+
+/* module parameter */
+static int radio_nr = -1;
+module_param(radio_nr, int, 0);
+MODULE_PARM_DESC(radio_nr, "Radio Nr");
+
+static int usb_amradio_probe(struct usb_interface *intf,
+			     const struct usb_device_id *id);
+static void usb_amradio_disconnect(struct usb_interface *intf);
+static int usb_amradio_open(struct file *file);
+static int usb_amradio_close(struct file *file);
+static int usb_amradio_suspend(struct usb_interface *intf,
+				pm_message_t message);
+static int usb_amradio_resume(struct usb_interface *intf);
+
+/* Data for one (physical) device */
+struct amradio_device {
+	/* reference to USB and video device */
+	struct usb_device *usbdev;
+	struct usb_interface *intf;
+	struct video_device videodev;
+	struct v4l2_device v4l2_dev;
+
+	unsigned char *buffer;
+	struct mutex lock;	/* buffer locking */
+	int curfreq;
+	int stereo;
+	int muted;
+	int initialized;
+};
+
+static inline struct amradio_device *to_amradio_dev(struct v4l2_device *v4l2_dev)
+{
+	return container_of(v4l2_dev, struct amradio_device, v4l2_dev);
+}
+
+/* USB Device ID List */
+static struct usb_device_id usb_amradio_device_table[] = {
+	{USB_DEVICE_AND_INTERFACE_INFO(USB_AMRADIO_VENDOR, USB_AMRADIO_PRODUCT,
+							USB_CLASS_HID, 0, 0) },
+	{ }						/* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE(usb, usb_amradio_device_table);
+
+/* USB subsystem interface */
+static struct usb_driver usb_amradio_driver = {
+	.name			= MR800_DRIVER_NAME,
+	.probe			= usb_amradio_probe,
+	.disconnect		= usb_amradio_disconnect,
+	.suspend		= usb_amradio_suspend,
+	.resume			= usb_amradio_resume,
+	.reset_resume		= usb_amradio_resume,
+	.id_table		= usb_amradio_device_table,
+	.supports_autosuspend	= 1,
+};
+
+/* switch on/off the radio. Send 8 bytes to device */
+static int amradio_set_mute(struct amradio_device *radio, char argument)
+{
+	int retval;
+	int size;
+
+	radio->buffer[0] = 0x00;
+	radio->buffer[1] = 0x55;
+	radio->buffer[2] = 0xaa;
+	radio->buffer[3] = 0x00;
+	radio->buffer[4] = AMRADIO_SET_MUTE;
+	radio->buffer[5] = argument;
+	radio->buffer[6] = 0x00;
+	radio->buffer[7] = 0x00;
+
+	retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2),
+		(void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT);
+
+	if (retval < 0 || size != BUFFER_LENGTH) {
+		amradio_dev_warn(&radio->videodev.dev, "set mute failed\n");
+		return retval;
+	}
+
+	radio->muted = argument;
+
+	return retval;
+}
+
+/* set a frequency, freq is defined by v4l's TUNER_LOW, i.e. 1/16th kHz */
+static int amradio_setfreq(struct amradio_device *radio, int freq)
+{
+	int retval;
+	int size;
+	unsigned short freq_send = 0x10 + (freq >> 3) / 25;
+
+	radio->buffer[0] = 0x00;
+	radio->buffer[1] = 0x55;
+	radio->buffer[2] = 0xaa;
+	radio->buffer[3] = 0x03;
+	radio->buffer[4] = AMRADIO_SET_FREQ;
+	radio->buffer[5] = 0x00;
+	radio->buffer[6] = 0x00;
+	radio->buffer[7] = 0x08;
+
+	retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2),
+		(void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT);
+
+	if (retval < 0 || size != BUFFER_LENGTH)
+		goto out_err;
+
+	/* frequency is calculated from freq_send and placed in first 2 bytes */
+	radio->buffer[0] = (freq_send >> 8) & 0xff;
+	radio->buffer[1] = freq_send & 0xff;
+	radio->buffer[2] = 0x01;
+	radio->buffer[3] = 0x00;
+	radio->buffer[4] = 0x00;
+	/* 5 and 6 bytes of buffer already = 0x00 */
+	radio->buffer[7] = 0x00;
+
+	retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2),
+		(void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT);
+
+	if (retval < 0 || size != BUFFER_LENGTH)
+		goto out_err;
+
+	radio->curfreq = freq;
+	goto out;
+
+out_err:
+	amradio_dev_warn(&radio->videodev.dev, "set frequency failed\n");
+out:
+	return retval;
+}
+
+static int amradio_set_stereo(struct amradio_device *radio, char argument)
+{
+	int retval;
+	int size;
+
+	radio->buffer[0] = 0x00;
+	radio->buffer[1] = 0x55;
+	radio->buffer[2] = 0xaa;
+	radio->buffer[3] = 0x00;
+	radio->buffer[4] = AMRADIO_SET_MONO;
+	radio->buffer[5] = argument;
+	radio->buffer[6] = 0x00;
+	radio->buffer[7] = 0x00;
+
+	retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2),
+		(void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT);
+
+	if (retval < 0 || size != BUFFER_LENGTH) {
+		amradio_dev_warn(&radio->videodev.dev, "set stereo failed\n");
+		return retval;
+	}
+
+	if (argument == WANT_STEREO)
+		radio->stereo = 1;
+	else
+		radio->stereo = 0;
+
+	return retval;
+}
+
+/* Handle unplugging the device.
+ * We call video_unregister_device in any case.
+ * The last function called in this procedure is
+ * usb_amradio_device_release.
+ */
+static void usb_amradio_disconnect(struct usb_interface *intf)
+{
+	struct amradio_device *radio = to_amradio_dev(usb_get_intfdata(intf));
+
+	mutex_lock(&radio->lock);
+	/* increase the device node's refcount */
+	get_device(&radio->videodev.dev);
+	v4l2_device_disconnect(&radio->v4l2_dev);
+	video_unregister_device(&radio->videodev);
+	mutex_unlock(&radio->lock);
+	/* decrease the device node's refcount, allowing it to be released */
+	put_device(&radio->videodev.dev);
+}
+
+/* vidioc_querycap - query device capabilities */
+static int vidioc_querycap(struct file *file, void *priv,
+					struct v4l2_capability *v)
+{
+	struct amradio_device *radio = file->private_data;
+
+	strlcpy(v->driver, "radio-mr800", sizeof(v->driver));
+	strlcpy(v->card, "AverMedia MR 800 USB FM Radio", sizeof(v->card));
+	usb_make_path(radio->usbdev, v->bus_info, sizeof(v->bus_info));
+	v->capabilities = V4L2_CAP_TUNER;
+	return 0;
+}
+
+/* vidioc_g_tuner - get tuner attributes */
+static int vidioc_g_tuner(struct file *file, void *priv,
+				struct v4l2_tuner *v)
+{
+	struct amradio_device *radio = file->private_data;
+	int retval;
+
+	if (v->index > 0)
+		return -EINVAL;
+
+/* TODO: Add function which look is signal stereo or not
+ * 	amradio_getstat(radio);
+ */
+
+/* we call amradio_set_stereo to set radio->stereo
+ * Honestly, amradio_getstat should cover this in future and
+ * amradio_set_stereo shouldn't be here
+ */
+	retval = amradio_set_stereo(radio, WANT_STEREO);
+
+	strcpy(v->name, "FM");
+	v->type = V4L2_TUNER_RADIO;
+	v->rangelow = FREQ_MIN * FREQ_MUL;
+	v->rangehigh = FREQ_MAX * FREQ_MUL;
+	v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
+	v->capability = V4L2_TUNER_CAP_LOW;
+	if (radio->stereo)
+		v->audmode = V4L2_TUNER_MODE_STEREO;
+	else
+		v->audmode = V4L2_TUNER_MODE_MONO;
+	v->signal = 0xffff;     /* Can't get the signal strength, sad.. */
+	v->afc = 0; /* Don't know what is this */
+
+	return retval;
+}
+
+/* vidioc_s_tuner - set tuner attributes */
+static int vidioc_s_tuner(struct file *file, void *priv,
+				struct v4l2_tuner *v)
+{
+	struct amradio_device *radio = file->private_data;
+	int retval = -EINVAL;
+
+	if (v->index > 0)
+		return -EINVAL;
+
+	/* mono/stereo selector */
+	switch (v->audmode) {
+	case V4L2_TUNER_MODE_MONO:
+		retval = amradio_set_stereo(radio, WANT_MONO);
+		break;
+	case V4L2_TUNER_MODE_STEREO:
+		retval = amradio_set_stereo(radio, WANT_STEREO);
+		break;
+	}
+
+	return retval;
+}
+
+/* vidioc_s_frequency - set tuner radio frequency */
+static int vidioc_s_frequency(struct file *file, void *priv,
+				struct v4l2_frequency *f)
+{
+	struct amradio_device *radio = file->private_data;
+
+	if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
+		return -EINVAL;
+	return amradio_setfreq(radio, f->frequency);
+}
+
+/* vidioc_g_frequency - get tuner radio frequency */
+static int vidioc_g_frequency(struct file *file, void *priv,
+				struct v4l2_frequency *f)
+{
+	struct amradio_device *radio = file->private_data;
+
+	if (f->tuner != 0)
+		return -EINVAL;
+	f->type = V4L2_TUNER_RADIO;
+	f->frequency = radio->curfreq;
+
+	return 0;
+}
+
+/* vidioc_queryctrl - enumerate control items */
+static int vidioc_queryctrl(struct file *file, void *priv,
+				struct v4l2_queryctrl *qc)
+{
+	switch (qc->id) {
+	case V4L2_CID_AUDIO_MUTE:
+		return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
+	}
+
+	return -EINVAL;
+}
+
+/* vidioc_g_ctrl - get the value of a control */
+static int vidioc_g_ctrl(struct file *file, void *priv,
+				struct v4l2_control *ctrl)
+{
+	struct amradio_device *radio = file->private_data;
+
+	switch (ctrl->id) {
+	case V4L2_CID_AUDIO_MUTE:
+		ctrl->value = radio->muted;
+		return 0;
+	}
+
+	return -EINVAL;
+}
+
+/* vidioc_s_ctrl - set the value of a control */
+static int vidioc_s_ctrl(struct file *file, void *priv,
+				struct v4l2_control *ctrl)
+{
+	struct amradio_device *radio = file->private_data;
+	int retval = -EINVAL;
+
+	switch (ctrl->id) {
+	case V4L2_CID_AUDIO_MUTE:
+		if (ctrl->value)
+			retval = amradio_set_mute(radio, AMRADIO_STOP);
+		else
+			retval = amradio_set_mute(radio, AMRADIO_START);
+
+		break;
+	}
+
+	return retval;
+}
+
+/* vidioc_g_audio - get audio attributes */
+static int vidioc_g_audio(struct file *file, void *priv,
+				struct v4l2_audio *a)
+{
+	if (a->index > 1)
+		return -EINVAL;
+
+	strcpy(a->name, "Radio");
+	a->capability = V4L2_AUDCAP_STEREO;
+	return 0;
+}
+
+/* vidioc_s_audio - set audio attributes  */
+static int vidioc_s_audio(struct file *file, void *priv,
+					struct v4l2_audio *a)
+{
+	if (a->index != 0)
+		return -EINVAL;
+	return 0;
+}
+
+/* vidioc_g_input - get input */
+static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
+{
+	*i = 0;
+	return 0;
+}
+
+/* vidioc_s_input - set input */
+static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
+{
+	if (i != 0)
+		return -EINVAL;
+	return 0;
+}
+
+static int usb_amradio_init(struct amradio_device *radio)
+{
+	int retval;
+
+	retval = amradio_set_mute(radio, AMRADIO_STOP);
+	if (retval)
+		goto out_err;
+
+	retval = amradio_set_stereo(radio, WANT_STEREO);
+	if (retval)
+		goto out_err;
+
+	radio->initialized = 1;
+	goto out;
+
+out_err:
+	amradio_dev_err(&radio->videodev.dev, "initialization failed\n");
+out:
+	return retval;
+}
+
+/* open device - amradio_start() and amradio_setfreq() */
+static int usb_amradio_open(struct file *file)
+{
+	struct amradio_device *radio = video_drvdata(file);
+	int retval;
+
+	file->private_data = radio;
+	retval = usb_autopm_get_interface(radio->intf);
+	if (retval)
+		return retval;
+
+	if (unlikely(!radio->initialized)) {
+		retval = usb_amradio_init(radio);
+		if (retval)
+			usb_autopm_put_interface(radio->intf);
+	}
+	return retval;
+}
+
+/*close device */
+static int usb_amradio_close(struct file *file)
+{
+	struct amradio_device *radio = file->private_data;
+
+	if (video_is_registered(&radio->videodev))
+		usb_autopm_put_interface(radio->intf);
+	return 0;
+}
+
+/* Suspend device - stop device. Need to be checked and fixed */
+static int usb_amradio_suspend(struct usb_interface *intf, pm_message_t message)
+{
+	struct amradio_device *radio = to_amradio_dev(usb_get_intfdata(intf));
+
+	mutex_lock(&radio->lock);
+	if (!radio->muted && radio->initialized) {
+		amradio_set_mute(radio, AMRADIO_STOP);
+		radio->muted = 0;
+	}
+	mutex_unlock(&radio->lock);
+
+	dev_info(&intf->dev, "going into suspend..\n");
+	return 0;
+}
+
+/* Resume device - start device. Need to be checked and fixed */
+static int usb_amradio_resume(struct usb_interface *intf)
+{
+	struct amradio_device *radio = to_amradio_dev(usb_get_intfdata(intf));
+
+	mutex_lock(&radio->lock);
+	if (unlikely(!radio->initialized))
+		goto unlock;
+
+	if (radio->stereo)
+		amradio_set_stereo(radio, WANT_STEREO);
+	else
+		amradio_set_stereo(radio, WANT_MONO);
+
+	amradio_setfreq(radio, radio->curfreq);
+
+	if (!radio->muted)
+		amradio_set_mute(radio, AMRADIO_START);
+
+unlock:
+	mutex_unlock(&radio->lock);
+
+	dev_info(&intf->dev, "coming out of suspend..\n");
+	return 0;
+}
+
+/* File system interface */
+static const struct v4l2_file_operations usb_amradio_fops = {
+	.owner		= THIS_MODULE,
+	.open		= usb_amradio_open,
+	.release	= usb_amradio_close,
+	.unlocked_ioctl	= video_ioctl2,
+};
+
+static const struct v4l2_ioctl_ops usb_amradio_ioctl_ops = {
+	.vidioc_querycap    = vidioc_querycap,
+	.vidioc_g_tuner     = vidioc_g_tuner,
+	.vidioc_s_tuner     = vidioc_s_tuner,
+	.vidioc_g_frequency = vidioc_g_frequency,
+	.vidioc_s_frequency = vidioc_s_frequency,
+	.vidioc_queryctrl   = vidioc_queryctrl,
+	.vidioc_g_ctrl      = vidioc_g_ctrl,
+	.vidioc_s_ctrl      = vidioc_s_ctrl,
+	.vidioc_g_audio     = vidioc_g_audio,
+	.vidioc_s_audio     = vidioc_s_audio,
+	.vidioc_g_input     = vidioc_g_input,
+	.vidioc_s_input     = vidioc_s_input,
+};
+
+static void usb_amradio_video_device_release(struct video_device *videodev)
+{
+	struct amradio_device *radio = video_get_drvdata(videodev);
+
+	/* free rest memory */
+	kfree(radio->buffer);
+	kfree(radio);
+}
+
+/* check if the device is present and register with v4l and usb if it is */
+static int usb_amradio_probe(struct usb_interface *intf,
+				const struct usb_device_id *id)
+{
+	struct amradio_device *radio;
+	int retval = 0;
+
+	radio = kzalloc(sizeof(struct amradio_device), GFP_KERNEL);
+
+	if (!radio) {
+		dev_err(&intf->dev, "kmalloc for amradio_device failed\n");
+		retval = -ENOMEM;
+		goto err;
+	}
+
+	radio->buffer = kmalloc(BUFFER_LENGTH, GFP_KERNEL);
+
+	if (!radio->buffer) {
+		dev_err(&intf->dev, "kmalloc for radio->buffer failed\n");
+		retval = -ENOMEM;
+		goto err_nobuf;
+	}
+
+	retval = v4l2_device_register(&intf->dev, &radio->v4l2_dev);
+	if (retval < 0) {
+		dev_err(&intf->dev, "couldn't register v4l2_device\n");
+		goto err_v4l2;
+	}
+
+	mutex_init(&radio->lock);
+
+	strlcpy(radio->videodev.name, radio->v4l2_dev.name,
+		sizeof(radio->videodev.name));
+	radio->videodev.v4l2_dev = &radio->v4l2_dev;
+	radio->videodev.fops = &usb_amradio_fops;
+	radio->videodev.ioctl_ops = &usb_amradio_ioctl_ops;
+	radio->videodev.release = usb_amradio_video_device_release;
+	radio->videodev.lock = &radio->lock;
+
+	radio->usbdev = interface_to_usbdev(intf);
+	radio->intf = intf;
+	radio->curfreq = 95.16 * FREQ_MUL;
+
+	video_set_drvdata(&radio->videodev, radio);
+
+	retval = video_register_device(&radio->videodev, VFL_TYPE_RADIO,
+					radio_nr);
+	if (retval < 0) {
+		dev_err(&intf->dev, "could not register video device\n");
+		goto err_vdev;
+	}
+
+	return 0;
+
+err_vdev:
+	v4l2_device_unregister(&radio->v4l2_dev);
+err_v4l2:
+	kfree(radio->buffer);
+err_nobuf:
+	kfree(radio);
+err:
+	return retval;
+}
+
+module_usb_driver(usb_amradio_driver);