diff options
Diffstat (limited to 'drivers/media/radio/radio-mr800.c')
| -rw-r--r-- | drivers/media/radio/radio-mr800.c | 81 |
1 files changed, 79 insertions, 2 deletions
diff --git a/drivers/media/radio/radio-mr800.c b/drivers/media/radio/radio-mr800.c index 0374c6ada43f..25ccf21c469e 100644 --- a/drivers/media/radio/radio-mr800.c +++ b/drivers/media/radio/radio-mr800.c @@ -93,11 +93,16 @@ devices, that would be 76 and 91. */ */ #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); @@ -263,13 +268,49 @@ static int amradio_setfreq(struct amradio_device *radio, int freq) return retval; } - radio->stereo = 0; + mutex_unlock(&radio->lock); + + return retval; +} + +static int amradio_set_stereo(struct amradio_device *radio, char argument) +{ + int retval; + int size; + + /* safety check */ + if (radio->removed) + return -EIO; + + mutex_lock(&radio->lock); + + 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) { + radio->stereo = -1; + mutex_unlock(&radio->lock); + return retval; + } + + radio->stereo = 1; mutex_unlock(&radio->lock); return retval; } + + /* USB subsystem interface begins here */ /* handle unplugging of the device, release data structures @@ -307,6 +348,7 @@ static int vidioc_g_tuner(struct file *file, void *priv, struct v4l2_tuner *v) { struct amradio_device *radio = video_get_drvdata(video_devdata(file)); + int retval; /* safety check */ if (radio->removed) @@ -318,7 +360,16 @@ static int vidioc_g_tuner(struct file *file, void *priv, /* TODO: Add function which look is signal stereo or not * amradio_getstat(radio); */ - radio->stereo = -1; + +/* 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); + if (retval < 0) + amradio_dev_warn(&radio->videodev->dev, + "set stereo failed\n"); + strcpy(v->name, "FM"); v->type = V4L2_TUNER_RADIO; v->rangelow = FREQ_MIN * FREQ_MUL; @@ -339,6 +390,7 @@ static int vidioc_s_tuner(struct file *file, void *priv, struct v4l2_tuner *v) { struct amradio_device *radio = video_get_drvdata(video_devdata(file)); + int retval; /* safety check */ if (radio->removed) @@ -346,6 +398,25 @@ static int vidioc_s_tuner(struct file *file, void *priv, if (v->index > 0) return -EINVAL; + + /* mono/stereo selector */ + switch (v->audmode) { + case V4L2_TUNER_MODE_MONO: + retval = amradio_set_stereo(radio, WANT_MONO); + if (retval < 0) + amradio_dev_warn(&radio->videodev->dev, + "set mono failed\n"); + break; + case V4L2_TUNER_MODE_STEREO: + retval = amradio_set_stereo(radio, WANT_STEREO); + if (retval < 0) + amradio_dev_warn(&radio->videodev->dev, + "set stereo failed\n"); + break; + default: + return -EINVAL; + } + return 0; } @@ -505,6 +576,11 @@ static int usb_amradio_open(struct file *file) return -EIO; } + retval = amradio_set_stereo(radio, WANT_STEREO); + if (retval < 0) + amradio_dev_warn(&radio->videodev->dev, + "set stereo failed\n"); + retval = amradio_setfreq(radio, radio->curfreq); if (retval < 0) amradio_dev_warn(&radio->videodev->dev, @@ -646,6 +722,7 @@ static int usb_amradio_probe(struct usb_interface *intf, radio->users = 0; radio->usbdev = interface_to_usbdev(intf); radio->curfreq = 95.16 * FREQ_MUL; + radio->stereo = -1; mutex_init(&radio->lock); |