Commit 78df617a authored by Andreas Mohr's avatar Andreas Mohr Committed by Takashi Iwai
Browse files

ALSA: azt3328: fix previous breakage, improve suspend, cleanups 



- fix my previous codec activity breakage (_non-warned_ variable assignment
  issue)
- convert suspend/resume to 32bit I/O access (I/O is painful; to improve
  suspend/resume performance)
- change DEBUG_PLAY_REC to DEBUG_CODEC for consistency
- printk cleanup
- some logging improvements
- minor cleanup/improvements

The variable assignment issue above was a conditional assignment to the
call_function variable (this ended with the non-preinitialized variable
not getting assigned in some cases, thus a dangling stack value, yet gcc 4.3.3
unbelievably did _NOT_ warn about it in this case!!),
needed to change this into _always_ assigning the check result.
Practical result of this bug was that when shutting down
_either_ playback or capture, _both_ streams dropped dead :P

Tested, working (plus resume) and checkpatch.pl:ed on 2.6.30-rc5,
applies cleanly to 2.6.30 proper with my previous (committed)
patches applied.

Signed-off-by: default avatarAndreas Mohr <andi@lisas.de>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent dfbf9511

sound/pci/azt3328.c

+124 −76
Original line number Diff line number Diff line
@@ -15,7 +15,7 @@ 
 *   has very good support out of the box;

 *   just to make sure that the right people hit this and get to know that,

 *   despite the high level of Internet ignorance - as usual :-P -

 *   about Linux support for this card)

 *   about very good support for this card - on Linux!)

 *

 * GPL LICENSE

 *  This program is free software; you can redistribute it and/or modify
@@ -222,22 +222,23 @@ MODULE_SUPPORTED_DEVICE("{{Aztech,AZF3328}}"); 
#define DEBUG_MISC	0

#define DEBUG_CALLS	0

#define DEBUG_MIXER	0

#define DEBUG_PLAY_REC	0

#define DEBUG_CODEC	0

#define DEBUG_IO	0

#define DEBUG_TIMER	0

#define DEBUG_GAME	0

#define DEBUG_PM	0

#define MIXER_TESTING	0



#if DEBUG_MISC

#define snd_azf3328_dbgmisc(format, args...) printk(KERN_ERR format, ##args)

#define snd_azf3328_dbgmisc(format, args...) printk(KERN_DEBUG format, ##args)

#else

#define snd_azf3328_dbgmisc(format, args...)

#endif



#if DEBUG_CALLS

#define snd_azf3328_dbgcalls(format, args...) printk(format, ##args)

#define snd_azf3328_dbgcallenter() printk(KERN_ERR "--> %s\n", __func__)

#define snd_azf3328_dbgcallleave() printk(KERN_ERR "<-- %s\n", __func__)

#define snd_azf3328_dbgcallenter() printk(KERN_DEBUG "--> %s\n", __func__)

#define snd_azf3328_dbgcallleave() printk(KERN_DEBUG "<-- %s\n", __func__)

#else

#define snd_azf3328_dbgcalls(format, args...)

#define snd_azf3328_dbgcallenter()
@@ -250,10 +251,10 @@ MODULE_SUPPORTED_DEVICE("{{Aztech,AZF3328}}"); 
#define snd_azf3328_dbgmixer(format, args...)

#endif



#if DEBUG_PLAY_REC

#define snd_azf3328_dbgplay(format, args...) printk(KERN_DEBUG format, ##args)

#if DEBUG_CODEC

#define snd_azf3328_dbgcodec(format, args...) printk(KERN_DEBUG format, ##args)

#else

#define snd_azf3328_dbgplay(format, args...)

#define snd_azf3328_dbgcodec(format, args...)

#endif



#if DEBUG_MISC
@@ -268,6 +269,12 @@ MODULE_SUPPORTED_DEVICE("{{Aztech,AZF3328}}"); 
#define snd_azf3328_dbggame(format, args...)

#endif



#if DEBUG_PM

#define snd_azf3328_dbgpm(format, args...) printk(KERN_DEBUG format, ##args)

#else

#define snd_azf3328_dbgpm(format, args...)

#endif



static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;	/* Index 0-MAX */

module_param_array(index, int, NULL, 0444);

MODULE_PARM_DESC(index, "Index value for AZF3328 soundcard.");
@@ -334,12 +341,12 @@ struct snd_azf3328 { 


#ifdef CONFIG_PM

	/* register value containers for power management

	 * Note: not always full I/O range preserved (just like Win driver!) */

	u16 saved_regs_ctrl[AZF_IO_SIZE_CTRL_PM / 2];

	u16 saved_regs_game [AZF_IO_SIZE_GAME_PM / 2];

	u16 saved_regs_mpu  [AZF_IO_SIZE_MPU_PM / 2];

	u16 saved_regs_opl3 [AZF_IO_SIZE_OPL3_PM / 2];

	u16 saved_regs_mixer[AZF_IO_SIZE_MIXER_PM / 2];

	 * Note: not always full I/O range preserved (similar to Win driver!) */

	u32 saved_regs_ctrl[AZF_ALIGN(AZF_IO_SIZE_CTRL_PM) / 4];

	u32 saved_regs_game[AZF_ALIGN(AZF_IO_SIZE_GAME_PM) / 4];

	u32 saved_regs_mpu[AZF_ALIGN(AZF_IO_SIZE_MPU_PM) / 4];

	u32 saved_regs_opl3[AZF_ALIGN(AZF_IO_SIZE_OPL3_PM) / 4];

	u32 saved_regs_mixer[AZF_ALIGN(AZF_IO_SIZE_MIXER_PM) / 4];

#endif

};
@@ -1029,19 +1036,20 @@ snd_azf3328_ctrl_reg_6AH_update(struct snd_azf3328 *chip, 
					bool enable

)

{

	if (enable)

		chip->shadow_reg_ctrl_6AH &= ~bitmask;

	else

	bool do_mask = !enable;

	if (do_mask)

		chip->shadow_reg_ctrl_6AH |= bitmask;

	snd_azf3328_dbgplay("6AH_update mask 0x%04x enable %d: val 0x%04x\n",

			bitmask, enable, chip->shadow_reg_ctrl_6AH);

	else

		chip->shadow_reg_ctrl_6AH &= ~bitmask;

	snd_azf3328_dbgcodec("6AH_update mask 0x%04x do_mask %d: val 0x%04x\n",

			bitmask, do_mask, chip->shadow_reg_ctrl_6AH);

	snd_azf3328_ctrl_outw(chip, IDX_IO_6AH, chip->shadow_reg_ctrl_6AH);

}



static inline void

snd_azf3328_ctrl_enable_codecs(struct snd_azf3328 *chip, bool enable)

{

	snd_azf3328_dbgplay("codec_enable %d\n", enable);

	snd_azf3328_dbgcodec("codec_enable %d\n", enable);

	/* no idea what exactly is being done here, but I strongly assume it's

	 * PM related */

	snd_azf3328_ctrl_reg_6AH_update(
@@ -1058,7 +1066,7 @@ snd_azf3328_ctrl_codec_activity(struct snd_azf3328 *chip, 
	struct snd_azf3328_codec_data *codec = &chip->codecs[codec_type];

	bool need_change = (codec->running != enable);



	snd_azf3328_dbgplay(

	snd_azf3328_dbgcodec(

		"codec_activity: %s codec, enable %d, need_change %d\n",

				codec->name, enable, need_change

	);
@@ -1081,11 +1089,11 @@ snd_azf3328_ctrl_codec_activity(struct snd_azf3328 *chip, 
			   (which globally shuts down operation of codecs)

			   only in case the other codecs are currently

			   not active either! */

			if ((!chip->codecs[peer_codecs[codec_type].other1]

			call_function =

				((!chip->codecs[peer_codecs[codec_type].other1]

					.running)

			     &&  (!chip->codecs[peer_codecs[codec_type].other2]

				.running))

				call_function = 1;

					.running));

		 }

		 if (call_function)

			snd_azf3328_ctrl_enable_codecs(chip, enable);
@@ -1097,9 +1105,9 @@ snd_azf3328_ctrl_codec_activity(struct snd_azf3328 *chip, 
				chip,

				codec_type

			);

	}

		codec->running = enable;

	}

}



static void

snd_azf3328_codec_setdmaa(struct snd_azf3328 *chip,
@@ -1114,15 +1122,16 @@ snd_azf3328_codec_setdmaa(struct snd_azf3328 *chip, 
	if (!codec->running) {

		/* AZF3328 uses a two buffer pointer DMA transfer approach */



		unsigned long flags;

		unsigned long flags, addr_area2;



		/* width 32bit (prevent overflow): */

		u32 addr_area2, count_areas, lengths;

		u32 count_areas, lengths;



		count_areas = size/2;

		addr_area2 = addr+count_areas;

		count_areas--; /* max. index */

		snd_azf3328_dbgplay("set DMA: buf1 %08lx[%lu], buf2 %08lx[%lu]\n", addr, count_areas, addr_area2, count_areas);

		snd_azf3328_dbgcodec("setdma: buffers %08lx[%u] / %08lx[%u]\n",

				addr, count_areas, addr_area2, count_areas);



		/* build combined I/O buffer length word */

		lengths = (count_areas << 16) | (count_areas);
@@ -1176,7 +1185,7 @@ snd_azf3328_codec_trigger(enum snd_azf3328_codec_type codec_type, 


	switch (cmd) {

	case SNDRV_PCM_TRIGGER_START:

		snd_azf3328_dbgplay("START %s\n", codec->name);

		snd_azf3328_dbgcodec("START %s\n", codec->name);



		if (is_playback_codec) {

			/* mute WaveOut (avoid clicking during setup) */
@@ -1243,10 +1252,10 @@ snd_azf3328_codec_trigger(enum snd_azf3328_codec_type codec_type, 
				);

		}



		snd_azf3328_dbgplay("STARTED %s\n", codec->name);

		snd_azf3328_dbgcodec("STARTED %s\n", codec->name);

		break;

	case SNDRV_PCM_TRIGGER_RESUME:

		snd_azf3328_dbgplay("RESUME %s\n", codec->name);

		snd_azf3328_dbgcodec("RESUME %s\n", codec->name);

		/* resume codec if we were active */

		spin_lock(&chip->reg_lock);

		if (codec->running)
@@ -1258,7 +1267,7 @@ snd_azf3328_codec_trigger(enum snd_azf3328_codec_type codec_type, 
		spin_unlock(&chip->reg_lock);

		break;

	case SNDRV_PCM_TRIGGER_STOP:

		snd_azf3328_dbgplay("STOP %s\n", codec->name);

		snd_azf3328_dbgcodec("STOP %s\n", codec->name);



		if (is_playback_codec) {

			/* mute WaveOut (avoid clicking during setup) */
@@ -1294,10 +1303,10 @@ snd_azf3328_codec_trigger(enum snd_azf3328_codec_type codec_type, 
				);

		}



		snd_azf3328_dbgplay("STOPPED %s\n", codec->name);

		snd_azf3328_dbgcodec("STOPPED %s\n", codec->name);

		break;

	case SNDRV_PCM_TRIGGER_SUSPEND:

		snd_azf3328_dbgplay("SUSPEND %s\n", codec->name);

		snd_azf3328_dbgcodec("SUSPEND %s\n", codec->name);

		/* make sure codec is stopped */

		snd_azf3328_codec_outw(codec, IDX_IO_CODEC_DMA_FLAGS,

			snd_azf3328_codec_inw(
@@ -1312,7 +1321,7 @@ snd_azf3328_codec_trigger(enum snd_azf3328_codec_type codec_type, 
		snd_printk(KERN_ERR "FIXME: SNDRV_PCM_TRIGGER_PAUSE_RELEASE NIY!\n");

                break;

        default:

		printk(KERN_ERR "FIXME: unknown trigger mode!\n");

		snd_printk(KERN_ERR "FIXME: unknown trigger mode!\n");

                return -EINVAL;

	}
@@ -1358,7 +1367,7 @@ snd_azf3328_codec_pointer(struct snd_pcm_substream *substream, 
	/* calculate offset */

	result -= bufptr;

	frmres = bytes_to_frames( substream->runtime, result);

	snd_azf3328_dbgplay("%s @ 0x%8lx, frames %8ld\n",

	snd_azf3328_dbgcodec("%s @ 0x%8lx, frames %8ld\n",

				codec->name, result, frmres);

	return frmres;

}
@@ -1607,7 +1616,7 @@ snd_azf3328_gameport_interrupt(struct snd_azf3328 *chip) 
static inline void

snd_azf3328_irq_log_unknown_type(u8 which)

{

	snd_azf3328_dbgplay(

	snd_azf3328_dbgcodec(

	"azt3328: unknown IRQ type (%x) occurred, please report!\n",

		which

	);
@@ -1636,12 +1645,9 @@ snd_azf3328_codec_interrupt(struct snd_azf3328 *chip, u8 status) 
		snd_azf3328_codec_outb(codec, IDX_IO_CODEC_IRQTYPE, which);

		spin_unlock(&chip->reg_lock);



		if ((chip->pcm[codec_type])

		&&  (chip->codecs[codec_type].substream)) {

			snd_pcm_period_elapsed(

				chip->codecs[codec_type].substream

			);

			snd_azf3328_dbgplay("%s period done (#%x), @ %x\n",

		if ((chip->pcm[codec_type]) && (codec->substream)) {

			snd_pcm_period_elapsed(codec->substream);

			snd_azf3328_dbgcodec("%s period done (#%x), @ %x\n",

				codec->name,

				which,

				snd_azf3328_codec_inl(
@@ -1660,7 +1666,7 @@ snd_azf3328_interrupt(int irq, void *dev_id) 
{

	struct snd_azf3328 *chip = dev_id;

	u8 status;

#if DEBUG_PLAY_REC

#if DEBUG_CODEC

	static unsigned long irq_count;

#endif
@@ -1673,14 +1679,14 @@ snd_azf3328_interrupt(int irq, void *dev_id) 
	))

		return IRQ_NONE; /* must be interrupt for another device */



	snd_azf3328_dbgplay(

	snd_azf3328_dbgcodec(

		"irq_count %ld! IDX_IO_IRQSTATUS %04x\n",

			irq_count++ /* debug-only */,

			status

	);



	if (status & IRQ_TIMER) {

		/* snd_azf3328_dbgplay("timer %ld\n",

		/* snd_azf3328_dbgcodec("timer %ld\n",

			snd_azf3328_codec_inl(chip, IDX_IO_TIMER_VALUE)

				& TIMER_VALUE_MASK

		); */
@@ -1690,7 +1696,7 @@ snd_azf3328_interrupt(int irq, void *dev_id) 
                spin_lock(&chip->reg_lock);

		snd_azf3328_ctrl_outb(chip, IDX_IO_TIMER_VALUE + 3, 0x07);

		spin_unlock(&chip->reg_lock);

		snd_azf3328_dbgplay("azt3328: timer IRQ\n");

		snd_azf3328_dbgcodec("azt3328: timer IRQ\n");

	}



	if (status & (IRQ_PLAYBACK|IRQ_RECORDING|IRQ_I2S_OUT))
@@ -1706,7 +1712,7 @@ snd_azf3328_interrupt(int irq, void *dev_id) 


		/* hmm, do we have to ack the IRQ here somehow?

		 * If so, then I don't know how yet... */

		snd_azf3328_dbgplay("azt3328: MPU401 IRQ\n");

		snd_azf3328_dbgcodec("azt3328: MPU401 IRQ\n");

	}

	return IRQ_HANDLED;

}
@@ -2091,7 +2097,7 @@ snd_azf3328_test_bit(unsigned unsigned reg, int bit) 


	outb(val, reg);



	printk(KERN_ERR "reg %04x bit %d: %02x %02x %02x\n",

	printk(KERN_DEBUG "reg %04x bit %d: %02x %02x %02x\n",

				reg, bit, val, valoff, valon

	);

}
@@ -2298,8 +2304,11 @@ snd_azf3328_probe(struct pci_dev *pci, const struct pci_device_id *pci_id) 


	card->private_data = chip;



	/* chose to use MPU401_HW_AZT2320 ID instead of MPU401_HW_MPU401,

	   since our hardware ought to be similar, thus use same ID. */

	err = snd_mpu401_uart_new(

		card, 0, MPU401_HW_MPU401, chip->mpu_io, MPU401_INFO_INTEGRATED,

		card, 0,

		MPU401_HW_AZT2320, chip->mpu_io, MPU401_INFO_INTEGRATED,

		pci->irq, 0, &chip->rmidi

	);

	if (err < 0) {
@@ -2342,7 +2351,7 @@ snd_azf3328_probe(struct pci_dev *pci, const struct pci_device_id *pci_id) 
		goto out_err;



#ifdef MODULE

	printk(

	printk(KERN_INFO

"azt3328: Sound driver for Aztech AZF3328-based soundcards such as PCI168.\n"

"azt3328: Hardware was completely undocumented, unfortunately.\n"

"azt3328: Feel free to contact andi AT lisas.de for bug reports etc.!\n"
@@ -2377,37 +2386,52 @@ snd_azf3328_remove(struct pci_dev *pci) 
}



#ifdef CONFIG_PM

static inline void

snd_azf3328_suspend_regs(unsigned long io_addr, unsigned count, u32 *saved_regs)

{

	unsigned reg;



	for (reg = 0; reg < count; ++reg) {

		*saved_regs = inl(io_addr);

		snd_azf3328_dbgpm("suspend: io 0x%04lx: 0x%08x\n",

			io_addr, *saved_regs);

		++saved_regs;

		io_addr += sizeof(*saved_regs);

	}

}



static int

snd_azf3328_suspend(struct pci_dev *pci, pm_message_t state)

{

	struct snd_card *card = pci_get_drvdata(pci);

	struct snd_azf3328 *chip = card->private_data;

	unsigned reg;

	u16 *saved_regs_ctrl_u16;



	snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);



	snd_pcm_suspend_all(chip->pcm[AZF_CODEC_PLAYBACK]);

	snd_pcm_suspend_all(chip->pcm[AZF_CODEC_I2S_OUT]);



	for (reg = 0; reg < AZF_IO_SIZE_MIXER_PM / 2; ++reg)

		chip->saved_regs_mixer[reg] = inw(chip->mixer_io + reg * 2);

	snd_azf3328_suspend_regs(chip->mixer_io,

		ARRAY_SIZE(chip->saved_regs_mixer), chip->saved_regs_mixer);



	/* make sure to disable master volume etc. to prevent looping sound */

	snd_azf3328_mixer_set_mute(chip, IDX_MIXER_PLAY_MASTER, 1);

	snd_azf3328_mixer_set_mute(chip, IDX_MIXER_WAVEOUT, 1);



	for (reg = 0; reg < AZF_IO_SIZE_CTRL_PM / 2; ++reg)

		chip->saved_regs_ctrl[reg] = inw(chip->ctrl_io + reg * 2);

	snd_azf3328_suspend_regs(chip->ctrl_io,

		ARRAY_SIZE(chip->saved_regs_ctrl), chip->saved_regs_ctrl);



	/* manually store the one currently relevant write-only reg, too */

	chip->saved_regs_ctrl[IDX_IO_6AH / 2] = chip->shadow_reg_ctrl_6AH;

	saved_regs_ctrl_u16 = (u16 *)chip->saved_regs_ctrl;

	saved_regs_ctrl_u16[IDX_IO_6AH / 2] = chip->shadow_reg_ctrl_6AH;



	for (reg = 0; reg < AZF_IO_SIZE_GAME_PM / 2; ++reg)

		chip->saved_regs_game[reg] = inw(chip->game_io + reg * 2);

	for (reg = 0; reg < AZF_IO_SIZE_MPU_PM / 2; ++reg)

		chip->saved_regs_mpu[reg] = inw(chip->mpu_io + reg * 2);

	for (reg = 0; reg < AZF_IO_SIZE_OPL3_PM / 2; ++reg)

		chip->saved_regs_opl3[reg] = inw(chip->opl3_io + reg * 2);

	snd_azf3328_suspend_regs(chip->game_io,

		ARRAY_SIZE(chip->saved_regs_game), chip->saved_regs_game);

	snd_azf3328_suspend_regs(chip->mpu_io,

		ARRAY_SIZE(chip->saved_regs_mpu), chip->saved_regs_mpu);

	snd_azf3328_suspend_regs(chip->opl3_io,

		ARRAY_SIZE(chip->saved_regs_opl3), chip->saved_regs_opl3);



	pci_disable_device(pci);

	pci_save_state(pci);
@@ -2415,12 +2439,28 @@ snd_azf3328_suspend(struct pci_dev *pci, pm_message_t state) 
	return 0;

}



static inline void

snd_azf3328_resume_regs(const u32 *saved_regs,

			unsigned long io_addr,

			unsigned count

)

{

	unsigned reg;



	for (reg = 0; reg < count; ++reg) {

		outl(*saved_regs, io_addr);

		snd_azf3328_dbgpm("resume: io 0x%04lx: 0x%08x --> 0x%08x\n",

			io_addr, *saved_regs, inl(io_addr));

		++saved_regs;

		io_addr += sizeof(*saved_regs);

	}

}



static int

snd_azf3328_resume(struct pci_dev *pci)

{

	struct snd_card *card = pci_get_drvdata(pci);

	const struct snd_azf3328 *chip = card->private_data;

	unsigned reg;



	pci_set_power_state(pci, PCI_D0);

	pci_restore_state(pci);
@@ -2432,16 +2472,24 @@ snd_azf3328_resume(struct pci_dev *pci) 
	}

	pci_set_master(pci);



	for (reg = 0; reg < AZF_IO_SIZE_GAME_PM / 2; ++reg)

		outw(chip->saved_regs_game[reg], chip->game_io + reg * 2);

	for (reg = 0; reg < AZF_IO_SIZE_MPU_PM / 2; ++reg)

		outw(chip->saved_regs_mpu[reg], chip->mpu_io + reg * 2);

	for (reg = 0; reg < AZF_IO_SIZE_OPL3_PM / 2; ++reg)

		outw(chip->saved_regs_opl3[reg], chip->opl3_io + reg * 2);

	for (reg = 0; reg < AZF_IO_SIZE_MIXER_PM / 2; ++reg)

		outw(chip->saved_regs_mixer[reg], chip->mixer_io + reg * 2);

	for (reg = 0; reg < AZF_IO_SIZE_CTRL_PM / 2; ++reg)

		outw(chip->saved_regs_ctrl[reg], chip->ctrl_io + reg * 2);

	snd_azf3328_resume_regs(chip->saved_regs_game, chip->game_io,

					ARRAY_SIZE(chip->saved_regs_game));

	snd_azf3328_resume_regs(chip->saved_regs_mpu, chip->mpu_io,

					ARRAY_SIZE(chip->saved_regs_mpu));

	snd_azf3328_resume_regs(chip->saved_regs_opl3, chip->opl3_io,

					ARRAY_SIZE(chip->saved_regs_opl3));



	snd_azf3328_resume_regs(chip->saved_regs_mixer, chip->mixer_io,

					ARRAY_SIZE(chip->saved_regs_mixer));



	/* unfortunately with 32bit transfers, IDX_MIXER_PLAY_MASTER (0x02)

	   and IDX_MIXER_RESET (offset 0x00) get touched at the same time,

	   resulting in a mixer reset condition persisting until _after_

	   master vol was restored. Thus master vol needs an extra restore. */

	outw(((u16 *)chip->saved_regs_mixer)[1], chip->mixer_io + 2);



	snd_azf3328_resume_regs(chip->saved_regs_ctrl, chip->ctrl_io,

					ARRAY_SIZE(chip->saved_regs_ctrl));



	snd_power_change_state(card, SNDRV_CTL_POWER_D0);

	return 0;

sound/pci/azt3328.h

+11 −5
Original line number Diff line number Diff line
@@ -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: */
@@ -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  */

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