[media] radio-mr800: cleanup and have it comply to the V4L2 API
Implement the control framework and update to the latest V4L2 framework. The v4l2-compliance tool now runs without errors. Fixed bad g/s_tuner handling with respect to mono/stereo. Support control events. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans Verkuil
Mauro Carvalho Chehab
Родитель
f61861fa56
Коммит
85578b0fdc
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@ -62,6 +62,8 @@
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#include <linux/videodev2.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-ioctl.h>
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#include <media/v4l2-ctrls.h>
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#include <media/v4l2-event.h>
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#include <linux/usb.h>
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#include <linux/mutex.h>
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@ -117,29 +119,20 @@ static int radio_nr = -1;
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module_param(radio_nr, int, 0);
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MODULE_PARM_DESC(radio_nr, "Radio Nr");
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static int usb_amradio_probe(struct usb_interface *intf,
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const struct usb_device_id *id);
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static void usb_amradio_disconnect(struct usb_interface *intf);
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static int usb_amradio_open(struct file *file);
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static int usb_amradio_close(struct file *file);
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static int usb_amradio_suspend(struct usb_interface *intf,
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pm_message_t message);
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static int usb_amradio_resume(struct usb_interface *intf);
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/* Data for one (physical) device */
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struct amradio_device {
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/* reference to USB and video device */
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struct usb_device *usbdev;
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struct usb_interface *intf;
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struct video_device videodev;
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struct video_device vdev;
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struct v4l2_device v4l2_dev;
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struct v4l2_ctrl_handler hdl;
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unsigned char *buffer;
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struct mutex lock; /* buffer locking */
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int curfreq;
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int stereo;
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int muted;
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int initialized;
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};
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static inline struct amradio_device *to_amradio_dev(struct v4l2_device *v4l2_dev)
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@ -147,27 +140,6 @@ static inline struct amradio_device *to_amradio_dev(struct v4l2_device *v4l2_dev
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return container_of(v4l2_dev, struct amradio_device, v4l2_dev);
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}
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/* USB Device ID List */
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static struct usb_device_id usb_amradio_device_table[] = {
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{USB_DEVICE_AND_INTERFACE_INFO(USB_AMRADIO_VENDOR, USB_AMRADIO_PRODUCT,
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USB_CLASS_HID, 0, 0) },
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{ } /* Terminating entry */
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};
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MODULE_DEVICE_TABLE(usb, usb_amradio_device_table);
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/* USB subsystem interface */
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static struct usb_driver usb_amradio_driver = {
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.name = MR800_DRIVER_NAME,
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.probe = usb_amradio_probe,
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.disconnect = usb_amradio_disconnect,
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.suspend = usb_amradio_suspend,
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.resume = usb_amradio_resume,
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.reset_resume = usb_amradio_resume,
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.id_table = usb_amradio_device_table,
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.supports_autosuspend = 1,
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};
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/* switch on/off the radio. Send 8 bytes to device */
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static int amradio_set_mute(struct amradio_device *radio, char argument)
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{
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@ -187,21 +159,19 @@ static int amradio_set_mute(struct amradio_device *radio, char argument)
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(void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT);
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if (retval < 0 || size != BUFFER_LENGTH) {
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amradio_dev_warn(&radio->videodev.dev, "set mute failed\n");
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return retval;
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amradio_dev_warn(&radio->vdev.dev, "set mute failed\n");
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return retval < 0 ? retval : -EIO;
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}
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radio->muted = argument;
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return retval;
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return 0;
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}
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/* set a frequency, freq is defined by v4l's TUNER_LOW, i.e. 1/16th kHz */
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static int amradio_setfreq(struct amradio_device *radio, int freq)
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{
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unsigned short freq_send = 0x10 + (freq >> 3) / 25;
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int retval;
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int size;
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unsigned short freq_send = 0x10 + (freq >> 3) / 25;
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radio->buffer[0] = 0x00;
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radio->buffer[1] = 0x55;
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@ -216,7 +186,7 @@ static int amradio_setfreq(struct amradio_device *radio, int freq)
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(void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT);
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if (retval < 0 || size != BUFFER_LENGTH)
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goto out_err;
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goto out;
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/* frequency is calculated from freq_send and placed in first 2 bytes */
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radio->buffer[0] = (freq_send >> 8) & 0xff;
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@ -230,16 +200,14 @@ static int amradio_setfreq(struct amradio_device *radio, int freq)
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retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2),
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(void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT);
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if (retval < 0 || size != BUFFER_LENGTH)
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goto out_err;
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if (retval >= 0 && size == BUFFER_LENGTH) {
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radio->curfreq = freq;
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return 0;
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}
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radio->curfreq = freq;
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goto out;
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out_err:
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amradio_dev_warn(&radio->videodev.dev, "set frequency failed\n");
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out:
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return retval;
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amradio_dev_warn(&radio->vdev.dev, "set frequency failed\n");
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return retval < 0 ? retval : -EIO;
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}
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static int amradio_set_stereo(struct amradio_device *radio, char argument)
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@ -260,16 +228,12 @@ static int amradio_set_stereo(struct amradio_device *radio, char argument)
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(void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT);
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if (retval < 0 || size != BUFFER_LENGTH) {
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amradio_dev_warn(&radio->videodev.dev, "set stereo failed\n");
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return retval;
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amradio_dev_warn(&radio->vdev.dev, "set stereo failed\n");
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return retval < 0 ? retval : -EIO;
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}
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if (argument == WANT_STEREO)
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radio->stereo = 1;
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else
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radio->stereo = 0;
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return retval;
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radio->stereo = (argument == WANT_STEREO);
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return 0;
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}
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/* Handle unplugging the device.
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@ -282,25 +246,24 @@ static void usb_amradio_disconnect(struct usb_interface *intf)
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struct amradio_device *radio = to_amradio_dev(usb_get_intfdata(intf));
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mutex_lock(&radio->lock);
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/* increase the device node's refcount */
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get_device(&radio->videodev.dev);
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usb_set_intfdata(intf, NULL);
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video_unregister_device(&radio->vdev);
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v4l2_device_disconnect(&radio->v4l2_dev);
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video_unregister_device(&radio->videodev);
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mutex_unlock(&radio->lock);
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/* decrease the device node's refcount, allowing it to be released */
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put_device(&radio->videodev.dev);
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v4l2_device_put(&radio->v4l2_dev);
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}
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/* vidioc_querycap - query device capabilities */
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static int vidioc_querycap(struct file *file, void *priv,
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struct v4l2_capability *v)
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{
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struct amradio_device *radio = file->private_data;
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struct amradio_device *radio = video_drvdata(file);
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strlcpy(v->driver, "radio-mr800", sizeof(v->driver));
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strlcpy(v->card, "AverMedia MR 800 USB FM Radio", sizeof(v->card));
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usb_make_path(radio->usbdev, v->bus_info, sizeof(v->bus_info));
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v->capabilities = V4L2_CAP_TUNER;
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v->device_caps = V4L2_CAP_RADIO | V4L2_CAP_TUNER;
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v->capabilities = v->device_caps | V4L2_CAP_DEVICE_CAPS;
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return 0;
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}
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@ -308,44 +271,31 @@ static int vidioc_querycap(struct file *file, void *priv,
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static int vidioc_g_tuner(struct file *file, void *priv,
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struct v4l2_tuner *v)
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{
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struct amradio_device *radio = file->private_data;
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int retval;
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struct amradio_device *radio = video_drvdata(file);
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if (v->index > 0)
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return -EINVAL;
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/* TODO: Add function which look is signal stereo or not
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* amradio_getstat(radio);
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*/
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/* we call amradio_set_stereo to set radio->stereo
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* Honestly, amradio_getstat should cover this in future and
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* amradio_set_stereo shouldn't be here
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*/
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retval = amradio_set_stereo(radio, WANT_STEREO);
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strcpy(v->name, "FM");
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v->type = V4L2_TUNER_RADIO;
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v->rangelow = FREQ_MIN * FREQ_MUL;
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v->rangehigh = FREQ_MAX * FREQ_MUL;
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v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
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v->capability = V4L2_TUNER_CAP_LOW;
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if (radio->stereo)
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v->audmode = V4L2_TUNER_MODE_STEREO;
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else
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v->audmode = V4L2_TUNER_MODE_MONO;
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v->signal = 0xffff; /* Can't get the signal strength, sad.. */
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v->afc = 0; /* Don't know what is this */
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return retval;
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v->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO;
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/* We do not know how to get hold of the stereo indicator, so
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all we can do is give back both mono and stereo, which
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effectively means that we don't know. */
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v->rxsubchans = V4L2_TUNER_SUB_STEREO | V4L2_TUNER_SUB_MONO;
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v->signal = 0xffff;
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v->audmode = radio->stereo ?
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V4L2_TUNER_MODE_STEREO : V4L2_TUNER_MODE_MONO;
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return 0;
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}
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/* vidioc_s_tuner - set tuner attributes */
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static int vidioc_s_tuner(struct file *file, void *priv,
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struct v4l2_tuner *v)
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{
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struct amradio_device *radio = file->private_data;
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int retval = -EINVAL;
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struct amradio_device *radio = video_drvdata(file);
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if (v->index > 0)
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return -EINVAL;
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@ -353,34 +303,31 @@ static int vidioc_s_tuner(struct file *file, void *priv,
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/* mono/stereo selector */
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switch (v->audmode) {
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case V4L2_TUNER_MODE_MONO:
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retval = amradio_set_stereo(radio, WANT_MONO);
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break;
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case V4L2_TUNER_MODE_STEREO:
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retval = amradio_set_stereo(radio, WANT_STEREO);
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break;
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return amradio_set_stereo(radio, WANT_MONO);
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default:
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return amradio_set_stereo(radio, WANT_STEREO);
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}
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return retval;
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}
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/* vidioc_s_frequency - set tuner radio frequency */
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static int vidioc_s_frequency(struct file *file, void *priv,
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struct v4l2_frequency *f)
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{
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struct amradio_device *radio = file->private_data;
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struct amradio_device *radio = video_drvdata(file);
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if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
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if (f->tuner != 0)
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return -EINVAL;
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return amradio_setfreq(radio, f->frequency);
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return amradio_setfreq(radio, clamp_t(unsigned, f->frequency,
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FREQ_MIN * FREQ_MUL, FREQ_MAX * FREQ_MUL));
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}
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/* vidioc_g_frequency - get tuner radio frequency */
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static int vidioc_g_frequency(struct file *file, void *priv,
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struct v4l2_frequency *f)
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{
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struct amradio_device *radio = file->private_data;
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struct amradio_device *radio = video_drvdata(file);
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||||
|
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if (f->tuner != 0)
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||||
if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
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return -EINVAL;
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f->type = V4L2_TUNER_RADIO;
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f->frequency = radio->curfreq;
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|
|
@ -388,89 +335,20 @@ static int vidioc_g_frequency(struct file *file, void *priv,
|
|||
return 0;
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||||
}
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|
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/* vidioc_queryctrl - enumerate control items */
|
||||
static int vidioc_queryctrl(struct file *file, void *priv,
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||||
struct v4l2_queryctrl *qc)
|
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static int usb_amradio_s_ctrl(struct v4l2_ctrl *ctrl)
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||||
{
|
||||
switch (qc->id) {
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case V4L2_CID_AUDIO_MUTE:
|
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return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
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||||
}
|
||||
|
||||
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;
|
||||
struct amradio_device *radio =
|
||||
container_of(ctrl->handler, struct amradio_device, hdl);
|
||||
|
||||
switch (ctrl->id) {
|
||||
case V4L2_CID_AUDIO_MUTE:
|
||||
ctrl->value = radio->muted;
|
||||
return 0;
|
||||
return amradio_set_mute(radio,
|
||||
ctrl->val ? AMRADIO_STOP : AMRADIO_START);
|
||||
}
|
||||
|
||||
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,
|
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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;
|
||||
|
|
@ -483,51 +361,21 @@ static int usb_amradio_init(struct amradio_device *radio)
|
|||
if (retval)
|
||||
goto out_err;
|
||||
|
||||
radio->initialized = 1;
|
||||
goto out;
|
||||
|
||||
out_err:
|
||||
amradio_dev_err(&radio->videodev.dev, "initialization failed\n");
|
||||
amradio_dev_err(&radio->vdev.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) {
|
||||
if (!radio->muted) {
|
||||
amradio_set_mute(radio, AMRADIO_STOP);
|
||||
radio->muted = 0;
|
||||
}
|
||||
|
|
@ -543,9 +391,6 @@ 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
|
||||
|
|
@ -556,18 +401,22 @@ static int usb_amradio_resume(struct usb_interface *intf)
|
|||
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;
|
||||
}
|
||||
|
||||
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 = usb_amradio_open,
|
||||
.release = usb_amradio_close,
|
||||
.open = v4l2_fh_open,
|
||||
.release = v4l2_fh_release,
|
||||
.poll = v4l2_ctrl_poll,
|
||||
.unlocked_ioctl = video_ioctl2,
|
||||
};
|
||||
|
||||
|
|
@ -577,20 +426,18 @@ static const struct v4l2_ioctl_ops usb_amradio_ioctl_ops = {
|
|||
.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,
|
||||
.vidioc_log_status = v4l2_ctrl_log_status,
|
||||
.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
|
||||
.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
|
||||
};
|
||||
|
||||
static void usb_amradio_video_device_release(struct video_device *videodev)
|
||||
static void usb_amradio_release(struct v4l2_device *v4l2_dev)
|
||||
{
|
||||
struct amradio_device *radio = video_get_drvdata(videodev);
|
||||
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);
|
||||
}
|
||||
|
|
@ -624,23 +471,38 @@ static int usb_amradio_probe(struct usb_interface *intf,
|
|||
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);
|
||||
|
||||
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->v4l2_dev.ctrl_handler = &radio->hdl;
|
||||
radio->v4l2_dev.release = usb_amradio_release;
|
||||
strlcpy(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;
|
||||
set_bit(V4L2_FL_USE_FH_PRIO, &radio->vdev.flags);
|
||||
|
||||
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->videodev, radio);
|
||||
video_set_drvdata(&radio->vdev, radio);
|
||||
retval = usb_amradio_init(radio);
|
||||
if (retval)
|
||||
goto err_vdev;
|
||||
|
||||
retval = video_register_device(&radio->videodev, VFL_TYPE_RADIO,
|
||||
retval = video_register_device(&radio->vdev, VFL_TYPE_RADIO,
|
||||
radio_nr);
|
||||
if (retval < 0) {
|
||||
dev_err(&intf->dev, "could not register video device\n");
|
||||
|
|
@ -650,6 +512,8 @@ static int usb_amradio_probe(struct usb_interface *intf,
|
|||
return 0;
|
||||
|
||||
err_vdev:
|
||||
v4l2_ctrl_handler_free(&radio->hdl);
|
||||
err_ctrl:
|
||||
v4l2_device_unregister(&radio->v4l2_dev);
|
||||
err_v4l2:
|
||||
kfree(radio->buffer);
|
||||
|
|
@ -659,4 +523,24 @@ err:
|
|||
return retval;
|
||||
}
|
||||
|
||||
/* 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,
|
||||
};
|
||||
|
||||
module_usb_driver(usb_amradio_driver);
|
||||
|
|
|
|||
Загрузка…
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