Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 599 insertions, 0 deletions

diff --git a/drivers/media/radio/radio-mr800.c b/drivers/media/radio/radio-mr800.c
new file mode 100644
index 0000000000..cb0437b4c3
--- /dev/null
+++ b/drivers/media/radio/radio-mr800.c
@@ -0,0 +1,599 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * 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>
+ */
+
+/*
+ * 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://www.spinics.net/lists/linux-usb-devel/msg10109.html
+ *
+ * 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 <media/v4l2-ctrls.h>
+#include <media/v4l2-event.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_GET_READY_FLAG	0xa5
+#define AMRADIO_GET_SIGNAL	0xa7
+#define AMRADIO_GET_FREQ	0xa8
+#define AMRADIO_SET_SEARCH_UP	0xa9
+#define AMRADIO_SET_SEARCH_DOWN	0xaa
+#define AMRADIO_SET_MUTE	0xab
+#define AMRADIO_SET_RIGHT_MUTE	0xac
+#define AMRADIO_SET_LEFT_MUTE	0xad
+#define AMRADIO_SET_MONO	0xae
+#define AMRADIO_SET_SEARCH_LVL	0xb0
+#define AMRADIO_STOP_SEARCH	0xb1
+
+/* 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");
+
+/* 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 vdev;
+	struct v4l2_device v4l2_dev;
+	struct v4l2_ctrl_handler hdl;
+
+	u8 *buffer;
+	struct mutex lock;	/* buffer locking */
+	int curfreq;
+	int stereo;
+	int muted;
+};
+
+static inline struct amradio_device *to_amradio_dev(struct v4l2_device *v4l2_dev)
+{
+	return container_of(v4l2_dev, struct amradio_device, v4l2_dev);
+}
+
+static int amradio_send_cmd(struct amradio_device *radio, u8 cmd, u8 arg,
+		u8 *extra, u8 extralen, bool reply)
+{
+	int retval;
+	int size;
+
+	radio->buffer[0] = 0x00;
+	radio->buffer[1] = 0x55;
+	radio->buffer[2] = 0xaa;
+	radio->buffer[3] = extralen;
+	radio->buffer[4] = cmd;
+	radio->buffer[5] = arg;
+	radio->buffer[6] = 0x00;
+	radio->buffer[7] = extra || reply ? 8 : 0;
+
+	retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2),
+		radio->buffer, BUFFER_LENGTH, &size, USB_TIMEOUT);
+
+	if (retval < 0 || size != BUFFER_LENGTH) {
+		if (video_is_registered(&radio->vdev))
+			amradio_dev_warn(&radio->vdev.dev,
+					"cmd %02x failed\n", cmd);
+		return retval ? retval : -EIO;
+	}
+	if (!extra && !reply)
+		return 0;
+
+	if (extra) {
+		memcpy(radio->buffer, extra, extralen);
+		memset(radio->buffer + extralen, 0, 8 - extralen);
+		retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2),
+			radio->buffer, BUFFER_LENGTH, &size, USB_TIMEOUT);
+	} else {
+		memset(radio->buffer, 0, 8);
+		retval = usb_bulk_msg(radio->usbdev, usb_rcvbulkpipe(radio->usbdev, 0x81),
+			radio->buffer, BUFFER_LENGTH, &size, USB_TIMEOUT);
+	}
+	if (retval == 0 && size == BUFFER_LENGTH)
+		return 0;
+	if (video_is_registered(&radio->vdev) && cmd != AMRADIO_GET_READY_FLAG)
+		amradio_dev_warn(&radio->vdev.dev, "follow-up to cmd %02x failed\n", cmd);
+	return retval ? retval : -EIO;
+}
+
+/* switch on/off the radio. Send 8 bytes to device */
+static int amradio_set_mute(struct amradio_device *radio, bool mute)
+{
+	int ret = amradio_send_cmd(radio,
+			AMRADIO_SET_MUTE, mute, NULL, 0, false);
+
+	if (!ret)
+		radio->muted = mute;
+	return ret;
+}
+
+/* set a frequency, freq is defined by v4l's TUNER_LOW, i.e. 1/16th kHz */
+static int amradio_set_freq(struct amradio_device *radio, int freq)
+{
+	unsigned short freq_send;
+	u8 buf[3];
+	int retval;
+
+	/* we need to be sure that frequency isn't out of range */
+	freq = clamp_t(unsigned, freq, FREQ_MIN * FREQ_MUL, FREQ_MAX * FREQ_MUL);
+	freq_send = 0x10 + (freq >> 3) / 25;
+
+	/* frequency is calculated from freq_send and placed in first 2 bytes */
+	buf[0] = (freq_send >> 8) & 0xff;
+	buf[1] = freq_send & 0xff;
+	buf[2] = 0x01;
+
+	retval = amradio_send_cmd(radio, AMRADIO_SET_FREQ, 0, buf, 3, false);
+	if (retval)
+		return retval;
+	radio->curfreq = freq;
+	msleep(40);
+	return 0;
+}
+
+static int amradio_set_stereo(struct amradio_device *radio, bool stereo)
+{
+	int ret = amradio_send_cmd(radio,
+			AMRADIO_SET_MONO, !stereo, NULL, 0, false);
+
+	if (!ret)
+		radio->stereo = stereo;
+	return ret;
+}
+
+static int amradio_get_stat(struct amradio_device *radio, bool *is_stereo, u32 *signal)
+{
+	int ret = amradio_send_cmd(radio,
+			AMRADIO_GET_SIGNAL, 0, NULL, 0, true);
+
+	if (ret)
+		return ret;
+	*is_stereo = radio->buffer[2] >> 7;
+	*signal = (radio->buffer[3] & 0xf0) << 8;
+	return 0;
+}
+
+/* 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);
+	video_unregister_device(&radio->vdev);
+	amradio_set_mute(radio, true);
+	usb_set_intfdata(intf, NULL);
+	v4l2_device_disconnect(&radio->v4l2_dev);
+	mutex_unlock(&radio->lock);
+	v4l2_device_put(&radio->v4l2_dev);
+}
+
+/* vidioc_querycap - query device capabilities */
+static int vidioc_querycap(struct file *file, void *priv,
+					struct v4l2_capability *v)
+{
+	struct amradio_device *radio = video_drvdata(file);
+
+	strscpy(v->driver, "radio-mr800", sizeof(v->driver));
+	strscpy(v->card, "AverMedia MR 800 USB FM Radio", sizeof(v->card));
+	usb_make_path(radio->usbdev, v->bus_info, sizeof(v->bus_info));
+	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 = video_drvdata(file);
+	bool is_stereo = false;
+	int retval;
+
+	if (v->index > 0)
+		return -EINVAL;
+
+	v->signal = 0;
+	retval = amradio_get_stat(radio, &is_stereo, &v->signal);
+	if (retval)
+		return retval;
+
+	strscpy(v->name, "FM", sizeof(v->name));
+	v->type = V4L2_TUNER_RADIO;
+	v->rangelow = FREQ_MIN * FREQ_MUL;
+	v->rangehigh = FREQ_MAX * FREQ_MUL;
+	v->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO |
+		V4L2_TUNER_CAP_HWSEEK_WRAP;
+	v->rxsubchans = is_stereo ? V4L2_TUNER_SUB_STEREO : V4L2_TUNER_SUB_MONO;
+	v->audmode = radio->stereo ?
+		V4L2_TUNER_MODE_STEREO : V4L2_TUNER_MODE_MONO;
+	return 0;
+}
+
+/* vidioc_s_tuner - set tuner attributes */
+static int vidioc_s_tuner(struct file *file, void *priv,
+				const struct v4l2_tuner *v)
+{
+	struct amradio_device *radio = video_drvdata(file);
+
+	if (v->index > 0)
+		return -EINVAL;
+
+	/* mono/stereo selector */
+	switch (v->audmode) {
+	case V4L2_TUNER_MODE_MONO:
+		return amradio_set_stereo(radio, WANT_MONO);
+	default:
+		return amradio_set_stereo(radio, WANT_STEREO);
+	}
+}
+
+/* vidioc_s_frequency - set tuner radio frequency */
+static int vidioc_s_frequency(struct file *file, void *priv,
+				const struct v4l2_frequency *f)
+{
+	struct amradio_device *radio = video_drvdata(file);
+
+	if (f->tuner != 0)
+		return -EINVAL;
+	return amradio_set_freq(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 = video_drvdata(file);
+
+	if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
+		return -EINVAL;
+	f->type = V4L2_TUNER_RADIO;
+	f->frequency = radio->curfreq;
+
+	return 0;
+}
+
+static int vidioc_s_hw_freq_seek(struct file *file, void *priv,
+		const struct v4l2_hw_freq_seek *seek)
+{
+	static u8 buf[8] = {
+		0x3d, 0x32, 0x0f, 0x08, 0x3d, 0x32, 0x0f, 0x08
+	};
+	struct amradio_device *radio = video_drvdata(file);
+	unsigned long timeout;
+	int retval;
+
+	if (seek->tuner != 0 || !seek->wrap_around)
+		return -EINVAL;
+
+	if (file->f_flags & O_NONBLOCK)
+		return -EWOULDBLOCK;
+
+	retval = amradio_send_cmd(radio,
+			AMRADIO_SET_SEARCH_LVL, 0, buf, 8, false);
+	if (retval)
+		return retval;
+	amradio_set_freq(radio, radio->curfreq);
+	retval = amradio_send_cmd(radio,
+		seek->seek_upward ? AMRADIO_SET_SEARCH_UP : AMRADIO_SET_SEARCH_DOWN,
+		0, NULL, 0, false);
+	if (retval)
+		return retval;
+	timeout = jiffies + msecs_to_jiffies(30000);
+	for (;;) {
+		if (time_after(jiffies, timeout)) {
+			retval = -ENODATA;
+			break;
+		}
+		if (schedule_timeout_interruptible(msecs_to_jiffies(10))) {
+			retval = -ERESTARTSYS;
+			break;
+		}
+		retval = amradio_send_cmd(radio, AMRADIO_GET_READY_FLAG,
+				0, NULL, 0, true);
+		if (retval)
+			continue;
+		amradio_send_cmd(radio, AMRADIO_GET_FREQ, 0, NULL, 0, true);
+		if (radio->buffer[1] || radio->buffer[2]) {
+			/* To check: sometimes radio->curfreq is set to out of range value */
+			radio->curfreq = (radio->buffer[1] << 8) | radio->buffer[2];
+			radio->curfreq = (radio->curfreq - 0x10) * 200;
+			amradio_send_cmd(radio, AMRADIO_STOP_SEARCH,
+					0, NULL, 0, false);
+			amradio_set_freq(radio, radio->curfreq);
+			retval = 0;
+			break;
+		}
+	}
+	amradio_send_cmd(radio, AMRADIO_STOP_SEARCH, 0, NULL, 0, false);
+	amradio_set_freq(radio, radio->curfreq);
+	return retval;
+}
+
+static int usb_amradio_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+	struct amradio_device *radio =
+		container_of(ctrl->handler, struct amradio_device, hdl);
+
+	switch (ctrl->id) {
+	case V4L2_CID_AUDIO_MUTE:
+		return amradio_set_mute(radio, ctrl->val);
+	}
+
+	return -EINVAL;
+}
+
+static int usb_amradio_init(struct amradio_device *radio)
+{
+	int retval;
+
+	retval = amradio_set_mute(radio, true);
+	if (retval)
+		goto out_err;
+	retval = amradio_set_stereo(radio, true);
+	if (retval)
+		goto out_err;
+	retval = amradio_set_freq(radio, radio->curfreq);
+	if (retval)
+		goto out_err;
+	return 0;
+
+out_err:
+	amradio_dev_err(&radio->vdev.dev, "initialization failed\n");
+	return retval;
+}
+
+/* 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) {
+		amradio_set_mute(radio, true);
+		radio->muted = false;
+	}
+	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);
+	amradio_set_stereo(radio, radio->stereo);
+	amradio_set_freq(radio, radio->curfreq);
+
+	if (!radio->muted)
+		amradio_set_mute(radio, false);
+
+	mutex_unlock(&radio->lock);
+
+	dev_info(&intf->dev, "coming out of suspend..\n");
+	return 0;
+}
+
+static const struct v4l2_ctrl_ops usb_amradio_ctrl_ops = {
+	.s_ctrl = usb_amradio_s_ctrl,
+};
+
+/* File system interface */
+static const struct v4l2_file_operations usb_amradio_fops = {
+	.owner		= THIS_MODULE,
+	.open		= v4l2_fh_open,
+	.release	= v4l2_fh_release,
+	.poll		= v4l2_ctrl_poll,
+	.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_s_hw_freq_seek = vidioc_s_hw_freq_seek,
+	.vidioc_log_status  = v4l2_ctrl_log_status,
+	.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
+	.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
+};
+
+static void usb_amradio_release(struct v4l2_device *v4l2_dev)
+{
+	struct amradio_device *radio = to_amradio_dev(v4l2_dev);
+
+	/* free rest memory */
+	v4l2_ctrl_handler_free(&radio->hdl);
+	v4l2_device_unregister(&radio->v4l2_dev);
+	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;
+
+	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;
+	}
+
+	v4l2_ctrl_handler_init(&radio->hdl, 1);
+	v4l2_ctrl_new_std(&radio->hdl, &usb_amradio_ctrl_ops,
+			  V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
+	if (radio->hdl.error) {
+		retval = radio->hdl.error;
+		dev_err(&intf->dev, "couldn't register control\n");
+		goto err_ctrl;
+	}
+	mutex_init(&radio->lock);
+
+	radio->v4l2_dev.ctrl_handler = &radio->hdl;
+	radio->v4l2_dev.release = usb_amradio_release;
+	strscpy(radio->vdev.name, radio->v4l2_dev.name,
+		sizeof(radio->vdev.name));
+	radio->vdev.v4l2_dev = &radio->v4l2_dev;
+	radio->vdev.fops = &usb_amradio_fops;
+	radio->vdev.ioctl_ops = &usb_amradio_ioctl_ops;
+	radio->vdev.release = video_device_release_empty;
+	radio->vdev.lock = &radio->lock;
+	radio->vdev.device_caps = V4L2_CAP_RADIO | V4L2_CAP_TUNER |
+				  V4L2_CAP_HW_FREQ_SEEK;
+
+	radio->usbdev = interface_to_usbdev(intf);
+	radio->intf = intf;
+	usb_set_intfdata(intf, &radio->v4l2_dev);
+	radio->curfreq = 95.16 * FREQ_MUL;
+
+	video_set_drvdata(&radio->vdev, radio);
+	retval = usb_amradio_init(radio);
+	if (retval)
+		goto err_vdev;
+
+	retval = video_register_device(&radio->vdev, 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_ctrl_handler_free(&radio->hdl);
+err_ctrl:
+	v4l2_device_unregister(&radio->v4l2_dev);
+err_v4l2:
+	kfree(radio->buffer);
+err_nobuf:
+	kfree(radio);
+err:
+	return retval;
+}
+
+/* USB Device ID List */
+static const 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,
+};
+
+module_usb_driver(usb_amradio_driver);