[alsa-devel] MOTU Midi Express XT

[holger at dehnhardt.org]

29. Oktober 2016 21:28 Uhr, holger at dehnhardt.org schrieb:
> 29. Oktober 2016 19:28 Uhr, "Clemens Ladisch" <clemens at ladisch.de> schrieb:
> 
>> holger at dehnhardt.org wrote:
>> 
>>> As the driver is loaded and gives no error while loading, is there
>>> a way to investigate, why no alsa device is shown?
>> 
>> Is there any message in the system log?
> 
> Yes:
> 
> Motu MidiTimePiece on parallel port irq: 10 ioport: 0xb010
> 
> That's all - not very verbose, or?
> 
> aplay -l shows
> 
> **** Liste der Hardware-Geräte (PLAYBACK) ****
> Karte 0: SB [HDA ATI SB], Gerät 0: ALC892 Analog [ALC892 Analog]
> Sub-Geräte: 1/1
> Sub-Gerät #0: subdevice #0
> Karte 0: SB [HDA ATI SB], Gerät 1: ALC892 Digital [ALC892 Digital]
> Sub-Geräte: 1/1
> Sub-Gerät #0: subdevice #0
> Karte 1: NVidia [HDA NVidia], Gerät 3: HDMI 0 [HDMI 0]
> Sub-Geräte: 1/1
> Sub-Gerät #0: subdevice #0
> Karte 1: NVidia [HDA NVidia], Gerät 7: HDMI 0 [HDMI 0]
> Sub-Geräte: 1/1
> Sub-Gerät #0: subdevice #0
> Karte 1: NVidia [HDA NVidia], Gerät 8: HDMI 0 [HDMI 0]
> Sub-Geräte: 1/1
> Sub-Gerät #0: subdevice #0
> Karte 1: NVidia [HDA NVidia], Gerät 9: HDMI 0 [HDMI 0]
> Sub-Geräte: 1/1
> Sub-Gerät #0: subdevice #0
> Karte 2: M44 [M Audio Delta 44], Gerät 0: ICE1712 multi [ICE1712 multi]
> Sub-Geräte: 1/1
> Sub-Gerät #0: subdevice #0
> 
> Holger
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one more test:

I added a print statement to to __init function (see the code and arrow -> below).
It initialises without error. 


static int __init alsa_card_mtpav_init(void)
{
        int err;

        if ((err = platform_driver_register(&snd_mtpav_driver)) < 0)
                return err;

        device = platform_device_register_simple(SND_MTPAV_DRIVER, -1, NULL, 0);
        if (!IS_ERR(device)) {
                if (platform_get_drvdata(device)){
->                        printk(KERN_INFO "ALSA init ok\n");
                        return 0;
                }
                platform_device_unregister(device);
                err = -ENODEV;
        } else
                err = PTR_ERR(device);
        platform_driver_unregister(&snd_mtpav_driver);
        printk(KERN_INFO "ALSA init with return code  %d\n", err);
        return err;
}

Shouldn't I find the driver afterwards?