SPCS0             729 include/sound/emu10k1.h #define SPCS0			0x54		/* SPDIF output Channel Status 0 register	*/
SPCS0             237 sound/pci/ca0106/ca0106.h #define SPCS0			0x41		/* SPDIF output Channel Status 0 register. For Rear. default=0x02108004, non-audio=0x02108006	*/
SPCS0             144 sound/pci/emu10k1/emu10k1x.c #define SPCS0			0x42		/* SPDIF output Channel Status 0 register	*/