--- /dev/null
+#ifndef __SOUND_AZT3328_H
+#define __SOUND_AZT3328_H
+
+/* "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) */
+#define AZF_IO_SIZE_CTRL 0x80
+#define AZF_IO_SIZE_CTRL_PM 0x70
+
+/* the driver initialisation suggests a layout of 4 areas
+ * within the main card control I/O:
+ * from 0x00 (playback codec), from 0x20 (recording codec)
+ * and from 0x40 (most certainly I2S out codec).
+ * And another area from 0x60 to 0x6f (DirectX timer, IRQ management,
+ * power management etc.???). */
+
+#define AZF_IO_OFFS_CODEC_PLAYBACK 0x00
+#define AZF_IO_OFFS_CODEC_CAPTURE 0x20
+#define AZF_IO_OFFS_CODEC_I2S_OUT 0x40
+
+#define IDX_IO_CODEC_DMA_FLAGS 0x00 /* PU:0x0000 */
+ /* able to reactivate output after output muting due to 8/16bit
+ * output change, just like 0x0002.
+ * 0x0001 is the only bit that's able to start the DMA counter */
+ #define DMA_RESUME 0x0001 /* paused if cleared? */
+ /* 0x0002 *temporarily* set during DMA stopping. hmm
+ * both 0x0002 and 0x0004 set in playback setup. */
+ /* able to reactivate output after output muting due to 8/16bit
+ * output change, just like 0x0001. */
+ #define DMA_RUN_SOMETHING1 0x0002 /* \ alternated (toggled) */
+ /* 0x0004: NOT able to reactivate output */
+ #define DMA_RUN_SOMETHING2 0x0004 /* / bits */
+ #define SOMETHING_ALMOST_ALWAYS_SET 0x0008 /* ???; can be modified */
+ #define DMA_EPILOGUE_SOMETHING 0x0010
+ #define DMA_SOMETHING_ELSE 0x0020 /* ??? */
+ #define SOMETHING_UNMODIFIABLE 0xffc0 /* unused? not modifiable */
+#define IDX_IO_CODEC_IRQTYPE 0x02 /* PU:0x0001 */
+ /* write back to flags in case flags are set, in order to ACK IRQ in handler
+ * (bit 1 of port 0x64 indicates interrupt for one of these three types)
+ * sometimes in this case it just writes 0xffff to globally ACK all IRQs
+ * settings written are not reflected when reading back, though.
+ * seems to be IRQ, too (frequently used: port |= 0x07 !), but who knows? */
+ #define IRQ_SOMETHING 0x0001 /* something & ACK */
+ #define IRQ_FINISHED_DMABUF_1 0x0002 /* 1st dmabuf finished & ACK */
+ #define IRQ_FINISHED_DMABUF_2 0x0004 /* 2nd dmabuf finished & ACK */
+ #define IRQMASK_SOME_STATUS_1 0x0008 /* \ related bits */
+ #define IRQMASK_SOME_STATUS_2 0x0010 /* / (checked together in loop) */
+ #define IRQMASK_UNMODIFIABLE 0xffe0 /* unused? not modifiable */
+ /* start address of 1st DMA transfer area, PU:0x00000000 */
+#define IDX_IO_CODEC_DMA_START_1 0x04
+ /* start address of 2nd DMA transfer area, PU:0x00000000 */
+#define IDX_IO_CODEC_DMA_START_2 0x08
+ /* both lengths of DMA transfer areas, PU:0x00000000
+ length1: offset 0x0c, length2: offset 0x0e */
+#define IDX_IO_CODEC_DMA_LENGTHS 0x0c
+#define IDX_IO_CODEC_DMA_CURRPOS 0x10 /* current DMA position, PU:0x00000000 */
+ /* offset within current DMA transfer area, PU:0x0000 */
+#define IDX_IO_CODEC_DMA_CURROFS 0x14
+#define IDX_IO_CODEC_SOUNDFORMAT 0x16 /* PU:0x0010 */
+ /* all unspecified bits can't be modified */
+ #define SOUNDFORMAT_FREQUENCY_MASK 0x000f
+ #define SOUNDFORMAT_XTAL1 0x00
+ #define SOUNDFORMAT_XTAL2 0x01
+ /* all _SUSPECTED_ values are not used by Windows drivers, so we don't
+ * have any hard facts, only rough measurements.
+ * All we know is that the crystal used on the board has 24.576MHz,
+ * like many soundcards (which results in the frequencies below when
+ * using certain divider values selected by the values below) */
+ #define SOUNDFORMAT_FREQ_SUSPECTED_4000 0x0c | SOUNDFORMAT_XTAL1
+ #define SOUNDFORMAT_FREQ_SUSPECTED_4800 0x0a | SOUNDFORMAT_XTAL1
+ #define SOUNDFORMAT_FREQ_5510 0x0c | SOUNDFORMAT_XTAL2
+ #define SOUNDFORMAT_FREQ_6620 0x0a | SOUNDFORMAT_XTAL2
+ #define SOUNDFORMAT_FREQ_8000 0x00 | SOUNDFORMAT_XTAL1 /* also 0x0e | SOUNDFORMAT_XTAL1? */
+ #define SOUNDFORMAT_FREQ_9600 0x08 | SOUNDFORMAT_XTAL1
+ #define SOUNDFORMAT_FREQ_11025 0x00 | SOUNDFORMAT_XTAL2 /* also 0x0e | SOUNDFORMAT_XTAL2? */
+ #define SOUNDFORMAT_FREQ_SUSPECTED_13240 0x08 | SOUNDFORMAT_XTAL2 /* seems to be 6620 *2 */
+ #define SOUNDFORMAT_FREQ_16000 0x02 | SOUNDFORMAT_XTAL1
+ #define SOUNDFORMAT_FREQ_22050 0x02 | SOUNDFORMAT_XTAL2
+ #define SOUNDFORMAT_FREQ_32000 0x04 | SOUNDFORMAT_XTAL1
+ #define SOUNDFORMAT_FREQ_44100 0x04 | SOUNDFORMAT_XTAL2
+ #define SOUNDFORMAT_FREQ_48000 0x06 | SOUNDFORMAT_XTAL1
+ #define SOUNDFORMAT_FREQ_SUSPECTED_66200 0x06 | SOUNDFORMAT_XTAL2 /* 66200 (13240 * 5); 64000 may have been nicer :-\ */
+ #define SOUNDFORMAT_FLAG_16BIT 0x0010
+ #define SOUNDFORMAT_FLAG_2CHANNELS 0x0020
+
+
+/* define frequency helpers, for maximum value safety */
+enum azf_freq_t {
+#define AZF_FREQ(rate) AZF_FREQ_##rate = rate
+ AZF_FREQ(4000),
+ AZF_FREQ(4800),
+ AZF_FREQ(5512),
+ AZF_FREQ(6620),
+ AZF_FREQ(8000),
+ AZF_FREQ(9600),
+ AZF_FREQ(11025),
+ AZF_FREQ(13240),
+ AZF_FREQ(16000),
+ AZF_FREQ(22050),
+ AZF_FREQ(32000),
+ AZF_FREQ(44100),
+ AZF_FREQ(48000),
+ AZF_FREQ(66200),
+#undef AZF_FREQ
+};
+
+/** DirectX timer, main interrupt area (FIXME: and something else?) **/
+#define IDX_IO_TIMER_VALUE 0x60 /* found this timer area by pure luck :-) */
+ /* timer countdown value; triggers IRQ when timer is finished */
+ #define TIMER_VALUE_MASK 0x000fffffUL
+ /* activate timer countdown */
+ #define TIMER_COUNTDOWN_ENABLE 0x01000000UL
+ /* trigger timer IRQ on zero transition */
+ #define TIMER_IRQ_ENABLE 0x02000000UL
+ /* being set in IRQ handler in case port 0x00 (hmm, not port 0x64!?!?)
+ * had 0x0020 set upon IRQ handler */
+ #define TIMER_IRQ_ACK 0x04000000UL
+#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).
+ * 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
+ #define IRQ_I2S_OUT 0x0004 /* this IS I2S, right!? (untested) */
+ #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 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: */
+#define IDX_IO_SOME_VALUE 0x68
+ #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!!
+ * 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 /* 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_!
+ * Is this Digital Enhanced Game Port Enable??? Or maybe it's Testmode
+ * for Enhanced Digital Gameport (see 4D Wave DX card): */
+ #define IO_6A_SOMETHING1_GAMEPORT 0x0020
+ /* bit 8; sure, this _pauses_ playback (later resumes at same spot!),
+ * but what the heck is this really about??: */
+ #define IO_6A_PAUSE_PLAYBACK_BIT8 0x0100
+ /* bit 9; sure, this _pauses_ playback (later resumes at same spot!),
+ * but what the heck is this really about??: */
+ #define IO_6A_PAUSE_PLAYBACK_BIT9 0x0200
+ /* BIT8 and BIT9 are _NOT_ able to affect OPL3 MIDI playback,
+ * thus it suggests influence on PCM only!!
+ * However OTOH there seems to be no bit anywhere around here
+ * which is able to disable OPL3... */
+ /* bit 10: enabling this actually changes values at legacy gameport
+ * I/O address (0x200); is this enabling of the Digital Enhanced Game Port???
+ * Or maybe this simply switches off the NE558 circuit, since enabling this
+ * still lets us evaluate button states, but not axis states */
+ #define IO_6A_SOMETHING2_GAMEPORT 0x0400
+ /* writing 0x0300: causes quite some crackling during
+ * PC activity such as switching windows (PCI traffic??
+ * --> FIFO/timing settings???) */
+ /* writing 0x0100 plus/or 0x0200 inhibits playback */
+ /* since the Windows .INF file has Flag_Enable_JoyStick and
+ * Flag_Enable_SB_DOS_Emulation directly together, it stands to reason
+ * that some other bit in this same register might be responsible
+ * for SB DOS Emulation activation (note that the file did NOT define
+ * a switch for OPL3!) */
+#define IDX_IO_6CH 0x6C /* unknown; fully read-writable */
+#define IDX_IO_6EH 0x6E
+ /* writing 0xffff returns 0x83fe (or 0x03fe only).
+ * writing 0x83 (and only 0x83!!) to 0x6f will cause 0x6c to switch
+ * from 0000 to ffff. */
+
+/* further I/O indices not saved/restored and not readable after writing,
+ * so probably not used */
+
+
+/*** 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
+
+enum {
+ AZF_GAME_LEGACY_IO_PORT = 0x200
+};
+
+#define IDX_GAME_LEGACY_COMPATIBLE 0x00
+ /* in some operation mode, writing anything to this port
+ * triggers an interrupt:
+ * yup, that's in case IDX_GAME_01H has one of the
+ * axis measurement bits enabled
+ * (and of course one needs to have GAME_HWCFG_IRQ_ENABLE, too) */
+
+#define IDX_GAME_AXES_CONFIG 0x01
+ /* NOTE: layout of this register awfully similar (read: "identical??")
+ * to AD1815JS.pdf (p.29) */
+
+ /* enables axis 1 (X axis) measurement: */
+ #define GAME_AXES_ENABLE_1 0x01
+ /* enables axis 2 (Y axis) measurement: */
+ #define GAME_AXES_ENABLE_2 0x02
+ /* enables axis 3 (X axis) measurement: */
+ #define GAME_AXES_ENABLE_3 0x04
+ /* enables axis 4 (Y axis) measurement: */
+ #define GAME_AXES_ENABLE_4 0x08
+ /* selects the current axis to read the measured value of
+ * (at IDX_GAME_AXIS_VALUE):
+ * 00 = axis 1, 01 = axis 2, 10 = axis 3, 11 = axis 4: */
+ #define GAME_AXES_READ_MASK 0x30
+ /* enable to have the latch continuously accept ADC values
+ * (and continuously cause interrupts in case interrupts are enabled);
+ * AD1815JS.pdf says it's ~16ms interval there: */
+ #define GAME_AXES_LATCH_ENABLE 0x40
+ /* joystick data (measured axes) ready for reading: */
+ #define GAME_AXES_SAMPLING_READY 0x80
+
+ /* NOTE: other card specs (SiS960 and others!) state that the
+ * game position latches should be frozen when reading and be freed
+ * (== reset?) after reading!!!
+ * Freezing most likely means disabling 0x40 (GAME_AXES_LATCH_ENABLE),
+ * but how to free the value? */
+ /* An internet search for "gameport latch ADC" should provide some insight
+ * into how to program such a gameport system. */
+
+ /* writing 0xf0 to 01H once reset both counters to 0, in some special mode!?
+ * yup, in case 6AH 0x20 is not enabled
+ * (and 0x40 is sufficient, 0xf0 is not needed) */
+
+#define IDX_GAME_AXIS_VALUE 0x02
+ /* R: value of currently configured axis (word value!);
+ * W: trigger axis measurement */
+
+#define IDX_GAME_HWCONFIG 0x04
+ /* note: bits 4 to 7 are never set (== 0) when reading!
+ * --> reserved bits? */
+ /* enables IRQ notification upon axes measurement ready: */
+ #define GAME_HWCFG_IRQ_ENABLE 0x01
+ /* these bits choose a different frequency for the
+ * internal ADC counter increment.
+ * hmm, seems to be a combo of bits:
+ * 00 --> standard frequency
+ * 10 --> 1/2
+ * 01 --> 1/20
+ * 11 --> 1/200: */
+ #define GAME_HWCFG_ADC_COUNTER_FREQ_MASK 0x06
+
+ /* FIXME: these values might be reversed... */
+ #define GAME_HWCFG_ADC_COUNTER_FREQ_STD 0
+ #define GAME_HWCFG_ADC_COUNTER_FREQ_1_2 1
+ #define GAME_HWCFG_ADC_COUNTER_FREQ_1_20 2
+ #define GAME_HWCFG_ADC_COUNTER_FREQ_1_200 3
+
+ /* enable gameport legacy I/O address (0x200)
+ * I was unable to locate any configurability for a different address: */
+ #define GAME_HWCFG_LEGACY_ADDRESS_ENABLE 0x08
+
+/*** MPU401 ***/
+#define AZF_IO_SIZE_MPU 0x04
+#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,
+ * there might be some enhanced functionality lurking at the end
+ * (especially since register 0x04 has a "non-empty" value 0xfe) */
+
+/*** mixer I/O area port indices ***/
+/* (only 0x22 of 0x40 bytes saved/restored by Windows driver)
+ * UNFORTUNATELY azf3328 is NOT truly AC97 compliant: see main file intro */
+#define AZF_IO_SIZE_MIXER 0x40
+#define AZF_IO_SIZE_MIXER_PM 0x22
+
+ #define MIXER_VOLUME_RIGHT_MASK 0x001f
+ #define MIXER_VOLUME_LEFT_MASK 0x1f00
+ #define MIXER_MUTE_MASK 0x8000
+#define IDX_MIXER_RESET 0x00 /* does NOT seem to have AC97 ID bits */
+#define IDX_MIXER_PLAY_MASTER 0x02
+#define IDX_MIXER_MODEMOUT 0x04
+#define IDX_MIXER_BASSTREBLE 0x06
+ #define MIXER_BASSTREBLE_TREBLE_VOLUME_MASK 0x000e
+ #define MIXER_BASSTREBLE_BASS_VOLUME_MASK 0x0e00
+#define IDX_MIXER_PCBEEP 0x08
+#define IDX_MIXER_MODEMIN 0x0a
+#define IDX_MIXER_MIC 0x0c
+ #define MIXER_MIC_MICGAIN_20DB_ENHANCEMENT_MASK 0x0040
+#define IDX_MIXER_LINEIN 0x0e
+#define IDX_MIXER_CDAUDIO 0x10
+#define IDX_MIXER_VIDEO 0x12
+#define IDX_MIXER_AUX 0x14
+#define IDX_MIXER_WAVEOUT 0x16
+#define IDX_MIXER_FMSYNTH 0x18
+#define IDX_MIXER_REC_SELECT 0x1a
+ #define MIXER_REC_SELECT_MIC 0x00
+ #define MIXER_REC_SELECT_CD 0x01
+ #define MIXER_REC_SELECT_VIDEO 0x02
+ #define MIXER_REC_SELECT_AUX 0x03
+ #define MIXER_REC_SELECT_LINEIN 0x04
+ #define MIXER_REC_SELECT_MIXSTEREO 0x05
+ #define MIXER_REC_SELECT_MIXMONO 0x06
+ #define MIXER_REC_SELECT_MONOIN 0x07
+#define IDX_MIXER_REC_VOLUME 0x1c
+#define IDX_MIXER_ADVCTL1 0x1e
+ /* unlisted bits are unmodifiable */
+ #define MIXER_ADVCTL1_3DWIDTH_MASK 0x000e
+ #define MIXER_ADVCTL1_HIFI3D_MASK 0x0300 /* yup, this is missing the high bit that official AC97 contains, plus it doesn't have linear bit value range behaviour but instead acts weirdly (possibly we're dealing with two *different* 3D settings here??) */
+#define IDX_MIXER_ADVCTL2 0x20 /* subset of AC97_GENERAL_PURPOSE reg! */
+ /* unlisted bits are unmodifiable */
+ #define MIXER_ADVCTL2_LPBK 0x0080 /* Loopback mode -- Win driver: "WaveOut3DBypass"? mutes WaveOut at LineOut */
+ #define MIXER_ADVCTL2_MS 0x0100 /* Mic Select 0=Mic1, 1=Mic2 -- Win driver: "ModemOutSelect"?? */
+ #define MIXER_ADVCTL2_MIX 0x0200 /* Mono output select 0=Mix, 1=Mic; Win driver: "MonoSelectSource"?? */
+ #define MIXER_ADVCTL2_3D 0x2000 /* 3D Enhancement 1=on */
+ #define MIXER_ADVCTL2_POP 0x8000 /* Pcm Out Path, 0=pre 3D, 1=post 3D */
+
+#define IDX_MIXER_SOMETHING30H 0x30 /* used, but unknown??? */
+
+/* driver internal flags */
+#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 */
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