diff options
Diffstat (limited to 'sound/pci/azt3328.h')
| -rw-r--r-- | sound/pci/azt3328.h | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/sound/pci/azt3328.h b/sound/pci/azt3328.h index 3448fd626f80..7e3e8942d073 100644 --- a/sound/pci/azt3328.h +++ b/sound/pci/azt3328.h @@ -1,7 +1,8 @@ #ifndef __SOUND_AZT3328_H #define __SOUND_AZT3328_H -/* "PU" == "power-up value", as tested on PCI168 PCI rev. 10 */ +/* "PU" == "power-up value", as tested on PCI168 PCI rev. 10 + * "WRITE_ONLY" == register does not indicate actual bit values */ /*** main I/O area port indices ***/ /* (only 0x70 of 0x80 bytes saved/restored by Windows driver) */ @@ -76,7 +77,7 @@ #define SOUNDFORMAT_FLAG_2CHANNELS 0x0020 /* define frequency helpers, for maximum value safety */ -enum { +enum azf_freq_t { #define AZF_FREQ(rate) AZF_FREQ_##rate = rate AZF_FREQ(4000), AZF_FREQ(4800), @@ -150,11 +151,18 @@ enum { #define IO_68_RANDOM_TOGGLE1 0x0100 /* toggles randomly */ #define IO_68_RANDOM_TOGGLE2 0x0200 /* toggles randomly */ /* umm, nope, behaviour of these bits changes depending on what we wrote - * to 0x6b!! */ + * to 0x6b!! + * And they change upon playback/stop, too: + * Writing a value to 0x68 will display this exact value during playback, + * too but when stopped it can fall back to a rather different + * seemingly random value). Hmm, possibly this is a register which + * has a remote shadow which needs proper device supply which only exists + * in case playback is active? Or is this driver-induced? + */ /* this WORD can be set to have bits 0x0028 activated (FIXME: correct??); * actually inhibits PCM playback!!! maybe power management??: */ -#define IDX_IO_6AH 0x6A +#define IDX_IO_6AH 0x6A /* WRITE_ONLY! */ /* bit 5: enabling this will activate permanent counting of bytes 2/3 * at gameport I/O (0xb402/3) (equal values each) and cause * gameport legacy I/O at 0x0200 to be _DISABLED_! |