diff options
Diffstat (limited to 'sound/pci/azt3328.h')
| -rw-r--r-- | sound/pci/azt3328.h | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/sound/pci/azt3328.h b/sound/pci/azt3328.h index 11d4b108b8db..6f46b97650cc 100644 --- a/sound/pci/azt3328.h +++ b/sound/pci/azt3328.h @@ -120,8 +120,10 @@ enum azf_freq_t { #define IDX_IO_IRQSTATUS 0x64 /* some IRQ bit in here might also be used to signal a power-management timer * timeout, to request shutdown of the chip (e.g. AD1815JS has such a thing). - * Some OPL3 hardware (e.g. in LM4560) has some special timer hardware which - * can trigger an OPL3 timer IRQ, so maybe there's such a thing as well... */ + * OPL3 hardware contains several timers which confusingly in most cases + * are NOT routed to an IRQ, but some designs (e.g. LM4560) DO support that, + * so I wouldn't be surprised at all to discover that AZF3328 + * supports that thing as well... */ #define IRQ_PLAYBACK 0x0001 #define IRQ_RECORDING 0x0002 @@ -129,8 +131,8 @@ enum azf_freq_t { #define IRQ_GAMEPORT 0x0008 /* Interrupt of Digital(ly) Enhanced Game Port */ #define IRQ_MPU401 0x0010 #define IRQ_TIMER 0x0020 /* DirectX timer */ - #define IRQ_UNKNOWN2 0x0040 /* probably unused, or possibly I2S port? */ - #define IRQ_UNKNOWN3 0x0080 /* probably unused, or possibly I2S port? */ + #define IRQ_UNKNOWN2 0x0040 /* probably unused, or possibly OPL3 timer? */ + #define IRQ_UNKNOWN3 0x0080 /* probably unused, or possibly OPL3 timer? */ #define IDX_IO_66H 0x66 /* writing 0xffff returns 0x0000 */ /* this is set to e.g. 0x3ff or 0x300, and writable; * maybe some buffer limit, but I couldn't find out more, PU:0x00ff: */ @@ -193,7 +195,7 @@ enum azf_freq_t { /*** Gameport area port indices ***/ /* (only 0x06 of 0x08 bytes saved/restored by Windows driver) */ #define AZF_IO_SIZE_GAME 0x08 -#define AZF_IO_SIZE_GAME_PM 0x06 +#define AZF_IO_SIZE_GAME_PM 0x06 enum { AZF_GAME_LEGACY_IO_PORT = 0x200 @@ -274,6 +276,7 @@ enum { #define AZF_IO_SIZE_MPU_PM 0x04 /*** OPL3 synth ***/ +/* (only 0x06 of 0x08 bytes saved/restored by Windows driver) */ #define AZF_IO_SIZE_OPL3 0x08 #define AZF_IO_SIZE_OPL3_PM 0x06 /* hmm, given that a standard OPL3 has 4 registers only, @@ -333,4 +336,7 @@ enum { #define SET_CHAN_LEFT 1 #define SET_CHAN_RIGHT 2 +/* helper macro to align I/O port ranges to 32bit I/O width */ +#define AZF_ALIGN(x) (((x) + 3) & (~3)) + #endif /* __SOUND_AZT3328_H */ |