Patch introduces new amradio_set_stereo function. Driver calls this func to make stereo radio reception.
Signed-off-by: Alexey Klimov <[email protected]> -- diff -r 34b045702595 linux/drivers/media/radio/radio-mr800.c --- a/linux/drivers/media/radio/radio-mr800.c Tue Feb 03 03:02:39 2009 +0300 +++ b/linux/drivers/media/radio/radio-mr800.c Tue Feb 03 03:04:54 2009 +0300 @@ -94,10 +94,15 @@ */ #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; @@ -266,12 +271,48 @@ 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) { + radio->stereo = -1; + mutex_unlock(&radio->lock); + return retval; + } + + radio->stereo = 1; mutex_unlock(&radio->lock); return retval; } + + /* USB subsystem interface begins here */ @@ -310,6 +351,7 @@ struct v4l2_tuner *v) { struct amradio_device *radio = video_get_drvdata(video_devdata(file)); + int retval; /* safety check */ if (radio->removed) @@ -321,7 +363,16 @@ /* 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; @@ -342,6 +393,7 @@ struct v4l2_tuner *v) { struct amradio_device *radio = video_get_drvdata(video_devdata(file)); + int retval; /* safety check */ if (radio->removed) @@ -349,6 +401,25 @@ 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; } @@ -508,6 +579,11 @@ 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, @@ -649,6 +725,7 @@ radio->users = 0; radio->usbdev = interface_to_usbdev(intf); radio->curfreq = 95.16 * FREQ_MUL; + radio->stereo = -1; mutex_init(&radio->lock); -- Best regards, Klimov Alexey -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
