[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/drivers/media/radio/dsbr100.c b/src/kernel/linux/v4.14/drivers/media/radio/dsbr100.c
new file mode 100644
index 0000000..8521bb2
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/media/radio/dsbr100.c
@@ -0,0 +1,429 @@
+/* A driver for the D-Link DSB-R100 USB radio and Gemtek USB Radio 21.
+ * The device plugs into both the USB and an analog audio input, so this thing
+ * only deals with initialisation and frequency setting, the
+ * audio data has to be handled by a sound driver.
+ *
+ * Major issue: I can't find out where the device reports the signal
+ * strength, and indeed the windows software appearantly just looks
+ * at the stereo indicator as well. So, scanning will only find
+ * stereo stations. Sad, but I can't help it.
+ *
+ * Also, the windows program sends oodles of messages over to the
+ * device, and I couldn't figure out their meaning. My suspicion
+ * is that they don't have any:-)
+ *
+ * You might find some interesting stuff about this module at
+ * http://unimut.fsk.uni-heidelberg.de/unimut/demi/dsbr
+ *
+ * Fully tested with the Keene USB FM Transmitter and the v4l2-compliance tool.
+ *
+ * Copyright (c) 2000 Markus Demleitner <msdemlei@cl.uni-heidelberg.de>
+ *
+ * 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.
+*/
+
+#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 <linux/usb.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-event.h>
+
+/*
+ * Version Information
+ */
+MODULE_AUTHOR("Markus Demleitner <msdemlei@tucana.harvard.edu>");
+MODULE_DESCRIPTION("D-Link DSB-R100 USB FM radio driver");
+MODULE_LICENSE("GPL");
+MODULE_VERSION("1.1.0");
+
+#define DSB100_VENDOR 0x04b4
+#define DSB100_PRODUCT 0x1002
+
+/* Commands the device appears to understand */
+#define DSB100_TUNE 1
+#define DSB100_ONOFF 2
+
+#define TB_LEN 16
+
+/* 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
+
+#define v4l2_dev_to_radio(d) container_of(d, struct dsbr100_device, v4l2_dev)
+
+static int radio_nr = -1;
+module_param(radio_nr, int, 0);
+
+/* Data for one (physical) device */
+struct dsbr100_device {
+ struct usb_device *usbdev;
+ struct video_device videodev;
+ struct v4l2_device v4l2_dev;
+ struct v4l2_ctrl_handler hdl;
+
+ u8 *transfer_buffer;
+ struct mutex v4l2_lock;
+ int curfreq;
+ bool stereo;
+ bool muted;
+};
+
+/* Low-level device interface begins here */
+
+/* set a frequency, freq is defined by v4l's TUNER_LOW, i.e. 1/16th kHz */
+static int dsbr100_setfreq(struct dsbr100_device *radio, unsigned freq)
+{
+ unsigned f = (freq / 16 * 80) / 1000 + 856;
+ int retval = 0;
+
+ if (!radio->muted) {
+ retval = usb_control_msg(radio->usbdev,
+ usb_rcvctrlpipe(radio->usbdev, 0),
+ DSB100_TUNE,
+ USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
+ (f >> 8) & 0x00ff, f & 0xff,
+ radio->transfer_buffer, 8, 300);
+ if (retval >= 0)
+ mdelay(1);
+ }
+
+ if (retval >= 0) {
+ radio->curfreq = freq;
+ return 0;
+ }
+ dev_err(&radio->usbdev->dev,
+ "%s - usb_control_msg returned %i, request %i\n",
+ __func__, retval, DSB100_TUNE);
+ return retval;
+}
+
+/* switch on radio */
+static int dsbr100_start(struct dsbr100_device *radio)
+{
+ int retval = usb_control_msg(radio->usbdev,
+ usb_rcvctrlpipe(radio->usbdev, 0),
+ DSB100_ONOFF,
+ USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
+ 0x01, 0x00, radio->transfer_buffer, 8, 300);
+
+ if (retval >= 0)
+ return dsbr100_setfreq(radio, radio->curfreq);
+ dev_err(&radio->usbdev->dev,
+ "%s - usb_control_msg returned %i, request %i\n",
+ __func__, retval, DSB100_ONOFF);
+ return retval;
+
+}
+
+/* switch off radio */
+static int dsbr100_stop(struct dsbr100_device *radio)
+{
+ int retval = usb_control_msg(radio->usbdev,
+ usb_rcvctrlpipe(radio->usbdev, 0),
+ DSB100_ONOFF,
+ USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
+ 0x00, 0x00, radio->transfer_buffer, 8, 300);
+
+ if (retval >= 0)
+ return 0;
+ dev_err(&radio->usbdev->dev,
+ "%s - usb_control_msg returned %i, request %i\n",
+ __func__, retval, DSB100_ONOFF);
+ return retval;
+
+}
+
+/* return the device status. This is, in effect, just whether it
+sees a stereo signal or not. Pity. */
+static void dsbr100_getstat(struct dsbr100_device *radio)
+{
+ int retval = usb_control_msg(radio->usbdev,
+ usb_rcvctrlpipe(radio->usbdev, 0),
+ USB_REQ_GET_STATUS,
+ USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
+ 0x00, 0x24, radio->transfer_buffer, 8, 300);
+
+ if (retval < 0) {
+ radio->stereo = false;
+ dev_err(&radio->usbdev->dev,
+ "%s - usb_control_msg returned %i, request %i\n",
+ __func__, retval, USB_REQ_GET_STATUS);
+ } else {
+ radio->stereo = !(radio->transfer_buffer[0] & 0x01);
+ }
+}
+
+static int vidioc_querycap(struct file *file, void *priv,
+ struct v4l2_capability *v)
+{
+ struct dsbr100_device *radio = video_drvdata(file);
+
+ strlcpy(v->driver, "dsbr100", sizeof(v->driver));
+ strlcpy(v->card, "D-Link R-100 USB FM Radio", sizeof(v->card));
+ usb_make_path(radio->usbdev, v->bus_info, sizeof(v->bus_info));
+ v->device_caps = V4L2_CAP_RADIO | V4L2_CAP_TUNER;
+ v->capabilities = v->device_caps | V4L2_CAP_DEVICE_CAPS;
+ return 0;
+}
+
+static int vidioc_g_tuner(struct file *file, void *priv,
+ struct v4l2_tuner *v)
+{
+ struct dsbr100_device *radio = video_drvdata(file);
+
+ if (v->index > 0)
+ return -EINVAL;
+
+ dsbr100_getstat(radio);
+ strcpy(v->name, "FM");
+ v->type = V4L2_TUNER_RADIO;
+ v->rangelow = FREQ_MIN * FREQ_MUL;
+ v->rangehigh = FREQ_MAX * FREQ_MUL;
+ v->rxsubchans = radio->stereo ? V4L2_TUNER_SUB_STEREO :
+ V4L2_TUNER_SUB_MONO;
+ v->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO;
+ v->audmode = V4L2_TUNER_MODE_STEREO;
+ v->signal = radio->stereo ? 0xffff : 0; /* We can't get the signal strength */
+ return 0;
+}
+
+static int vidioc_s_tuner(struct file *file, void *priv,
+ const struct v4l2_tuner *v)
+{
+ return v->index ? -EINVAL : 0;
+}
+
+static int vidioc_s_frequency(struct file *file, void *priv,
+ const struct v4l2_frequency *f)
+{
+ struct dsbr100_device *radio = video_drvdata(file);
+
+ if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
+ return -EINVAL;
+
+ return dsbr100_setfreq(radio, clamp_t(unsigned, f->frequency,
+ FREQ_MIN * FREQ_MUL, FREQ_MAX * FREQ_MUL));
+}
+
+static int vidioc_g_frequency(struct file *file, void *priv,
+ struct v4l2_frequency *f)
+{
+ struct dsbr100_device *radio = video_drvdata(file);
+
+ if (f->tuner)
+ return -EINVAL;
+ f->type = V4L2_TUNER_RADIO;
+ f->frequency = radio->curfreq;
+ return 0;
+}
+
+static int usb_dsbr100_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct dsbr100_device *radio =
+ container_of(ctrl->handler, struct dsbr100_device, hdl);
+
+ switch (ctrl->id) {
+ case V4L2_CID_AUDIO_MUTE:
+ radio->muted = ctrl->val;
+ return radio->muted ? dsbr100_stop(radio) : dsbr100_start(radio);
+ }
+ return -EINVAL;
+}
+
+
+/* USB subsystem interface begins here */
+
+/*
+ * Handle unplugging of the device.
+ * We call video_unregister_device in any case.
+ * The last function called in this procedure is
+ * usb_dsbr100_video_device_release
+ */
+static void usb_dsbr100_disconnect(struct usb_interface *intf)
+{
+ struct dsbr100_device *radio = usb_get_intfdata(intf);
+
+ mutex_lock(&radio->v4l2_lock);
+ /*
+ * Disconnect is also called on unload, and in that case we need to
+ * mute the device. This call will silently fail if it is called
+ * after a physical disconnect.
+ */
+ usb_control_msg(radio->usbdev,
+ usb_rcvctrlpipe(radio->usbdev, 0),
+ DSB100_ONOFF,
+ USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
+ 0x00, 0x00, radio->transfer_buffer, 8, 300);
+ usb_set_intfdata(intf, NULL);
+ video_unregister_device(&radio->videodev);
+ v4l2_device_disconnect(&radio->v4l2_dev);
+ mutex_unlock(&radio->v4l2_lock);
+ v4l2_device_put(&radio->v4l2_dev);
+}
+
+
+/* Suspend device - stop device. */
+static int usb_dsbr100_suspend(struct usb_interface *intf, pm_message_t message)
+{
+ struct dsbr100_device *radio = usb_get_intfdata(intf);
+
+ mutex_lock(&radio->v4l2_lock);
+ if (!radio->muted && dsbr100_stop(radio) < 0)
+ dev_warn(&intf->dev, "dsbr100_stop failed\n");
+ mutex_unlock(&radio->v4l2_lock);
+
+ dev_info(&intf->dev, "going into suspend..\n");
+ return 0;
+}
+
+/* Resume device - start device. */
+static int usb_dsbr100_resume(struct usb_interface *intf)
+{
+ struct dsbr100_device *radio = usb_get_intfdata(intf);
+
+ mutex_lock(&radio->v4l2_lock);
+ if (!radio->muted && dsbr100_start(radio) < 0)
+ dev_warn(&intf->dev, "dsbr100_start failed\n");
+ mutex_unlock(&radio->v4l2_lock);
+
+ dev_info(&intf->dev, "coming out of suspend..\n");
+ return 0;
+}
+
+/* free data structures */
+static void usb_dsbr100_release(struct v4l2_device *v4l2_dev)
+{
+ struct dsbr100_device *radio = v4l2_dev_to_radio(v4l2_dev);
+
+ v4l2_ctrl_handler_free(&radio->hdl);
+ v4l2_device_unregister(&radio->v4l2_dev);
+ kfree(radio->transfer_buffer);
+ kfree(radio);
+}
+
+static const struct v4l2_ctrl_ops usb_dsbr100_ctrl_ops = {
+ .s_ctrl = usb_dsbr100_s_ctrl,
+};
+
+/* File system interface */
+static const struct v4l2_file_operations usb_dsbr100_fops = {
+ .owner = THIS_MODULE,
+ .unlocked_ioctl = video_ioctl2,
+ .open = v4l2_fh_open,
+ .release = v4l2_fh_release,
+ .poll = v4l2_ctrl_poll,
+};
+
+static const struct v4l2_ioctl_ops usb_dsbr100_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_log_status = v4l2_ctrl_log_status,
+ .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
+ .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
+};
+
+/* check if the device is present and register with v4l and usb if it is */
+static int usb_dsbr100_probe(struct usb_interface *intf,
+ const struct usb_device_id *id)
+{
+ struct dsbr100_device *radio;
+ struct v4l2_device *v4l2_dev;
+ int retval;
+
+ radio = kzalloc(sizeof(struct dsbr100_device), GFP_KERNEL);
+
+ if (!radio)
+ return -ENOMEM;
+
+ radio->transfer_buffer = kmalloc(TB_LEN, GFP_KERNEL);
+
+ if (!(radio->transfer_buffer)) {
+ kfree(radio);
+ return -ENOMEM;
+ }
+
+ v4l2_dev = &radio->v4l2_dev;
+ v4l2_dev->release = usb_dsbr100_release;
+
+ retval = v4l2_device_register(&intf->dev, v4l2_dev);
+ if (retval < 0) {
+ v4l2_err(v4l2_dev, "couldn't register v4l2_device\n");
+ goto err_reg_dev;
+ }
+
+ v4l2_ctrl_handler_init(&radio->hdl, 1);
+ v4l2_ctrl_new_std(&radio->hdl, &usb_dsbr100_ctrl_ops,
+ V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
+ if (radio->hdl.error) {
+ retval = radio->hdl.error;
+ v4l2_err(v4l2_dev, "couldn't register control\n");
+ goto err_reg_ctrl;
+ }
+ mutex_init(&radio->v4l2_lock);
+ strlcpy(radio->videodev.name, v4l2_dev->name, sizeof(radio->videodev.name));
+ radio->videodev.v4l2_dev = v4l2_dev;
+ radio->videodev.fops = &usb_dsbr100_fops;
+ radio->videodev.ioctl_ops = &usb_dsbr100_ioctl_ops;
+ radio->videodev.release = video_device_release_empty;
+ radio->videodev.lock = &radio->v4l2_lock;
+ radio->videodev.ctrl_handler = &radio->hdl;
+
+ radio->usbdev = interface_to_usbdev(intf);
+ radio->curfreq = FREQ_MIN * FREQ_MUL;
+ radio->muted = true;
+
+ video_set_drvdata(&radio->videodev, radio);
+ usb_set_intfdata(intf, radio);
+
+ retval = video_register_device(&radio->videodev, VFL_TYPE_RADIO, radio_nr);
+ if (retval == 0)
+ return 0;
+ v4l2_err(v4l2_dev, "couldn't register video device\n");
+
+err_reg_ctrl:
+ v4l2_ctrl_handler_free(&radio->hdl);
+ v4l2_device_unregister(v4l2_dev);
+err_reg_dev:
+ kfree(radio->transfer_buffer);
+ kfree(radio);
+ return retval;
+}
+
+static const struct usb_device_id usb_dsbr100_device_table[] = {
+ { USB_DEVICE(DSB100_VENDOR, DSB100_PRODUCT) },
+ { } /* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE(usb, usb_dsbr100_device_table);
+
+/* USB subsystem interface */
+static struct usb_driver usb_dsbr100_driver = {
+ .name = "dsbr100",
+ .probe = usb_dsbr100_probe,
+ .disconnect = usb_dsbr100_disconnect,
+ .id_table = usb_dsbr100_device_table,
+ .suspend = usb_dsbr100_suspend,
+ .resume = usb_dsbr100_resume,
+ .reset_resume = usb_dsbr100_resume,
+};
+
+module_usb_driver(usb_dsbr100_driver);