d020b0ddde
attachment-specific detach functions. Returns EBUSY if the device instance is busy, based on whether or not a sc->sc_inbuf is allocated. The buffer is malloc()d at spkropen time, and is free()d in spkrclose(). Now we can actually implement the MODULE_CMD_FINI command and unload the driver at will. Addresses my PR kern/51785
29 lines
808 B
C
29 lines
808 B
C
/* $NetBSD: spkrvar.h,v 1.6 2017/01/06 09:32:08 pgoyette Exp $ */
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#ifndef _SYS_DEV_SPKRVAR_H
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#define _SYS_DEV_SPKRVAR_H
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#include <sys/module.h>
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struct spkr_softc {
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device_t sc_dev;
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int sc_octave; /* currently selected octave */
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int sc_whole; /* whole-note time at current tempo, in ticks */
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int sc_value; /* whole divisor for note time, quarter note = 1 */
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int sc_fill; /* controls spacing of notes */
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bool sc_octtrack; /* octave-tracking on? */
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bool sc_octprefix; /* override current octave-tracking state? */
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char *sc_inbuf;
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/* attachment-specific hooks */
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void (*sc_tone)(device_t, u_int, u_int);
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void (*sc_rest)(device_t, int);
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};
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void spkr_attach(device_t,
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void (*)(device_t, u_int, u_int), void (*)(device_t, int));
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int spkr_detach(device_t, int);
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#endif /* _SYS_DEV_SPKRVAR_H */
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