Merge branch 'linus' into x86/quirks

Conflicts:
	arch/x86/kernel/early-quirks.c

1 files changed, 293 insertions, 98 deletions

diff --git a/sound/pci/als4000.c b/sound/pci/als4000.c
index 27ce6136ab0..ba570053d4d 100644
--- a/sound/pci/als4000.c
+++ b/sound/pci/als4000.c
@@ -2,7 +2,7 @@
  *  card-als4000.c - driver for Avance Logic ALS4000 based soundcards.
  *  Copyright (C) 2000 by Bart Hartgers <bart@etpmod.phys.tue.nl>,
  *			  Jaroslav Kysela <perex@perex.cz>
- *  Copyright (C) 2002 by Andreas Mohr <hw7oshyuv3001@sneakemail.com>
+ *  Copyright (C) 2002, 2008 by Andreas Mohr <hw7oshyuv3001@sneakemail.com>
  *
  *  Framework borrowed from Massimo Piccioni's card-als100.c.
  *
@@ -27,8 +27,10 @@
  *  bought an ALS4000 based soundcard, I was forced to base this driver
  *  on reverse engineering.
  *
- *  Note: this is no longer true. Pretty verbose chip docu (ALS4000a.PDF)
- *  can be found on the ALSA web site.
+ *  Note: this is no longer true (thank you!):
+ *  pretty verbose chip docu (ALS4000a.PDF) can be found on the ALSA web site.
+ *  Page numbers stated anywhere below with the "SPECS_PAGE:" tag
+ *  refer to: ALS4000a.PDF specs Ver 1.0, May 28th, 1998.
  *
  *  The ALS4000 seems to be the PCI-cousin of the ALS100. It contains an
  *  ALS100-like SB DSP/mixer, an OPL3 synth, a MPU401 and a gameport 
@@ -59,7 +61,7 @@
  * - value -> some port 0x0c0d
  *
  * ToDo:
- * - Proper shared IRQ handling?
+ * - by default, don't enable legacy game and use PCI game I/O
  * - power management? (card can do voice wakeup according to datasheet!!)
  */
 
@@ -78,7 +80,7 @@
 #include <sound/sb.h>
 #include <sound/initval.h>
 
-MODULE_AUTHOR("Bart Hartgers <bart@etpmod.phys.tue.nl>");
+MODULE_AUTHOR("Bart Hartgers <bart@etpmod.phys.tue.nl>, Andreas Mohr");
 MODULE_DESCRIPTION("Avance Logic ALS4000");
 MODULE_LICENSE("GPL");
 MODULE_SUPPORTED_DEVICE("{{Avance Logic,ALS4000}}");
@@ -107,7 +109,7 @@ MODULE_PARM_DESC(joystick_port, "Joystick port address for ALS4000 soundcard. (0
 
 struct snd_card_als4000 {
 	/* most frequent access first */
-	unsigned long gcr;
+	unsigned long iobase;
 	struct pci_dev *pci;
 	struct snd_sb *chip;
 #ifdef SUPPORT_JOYSTICK
@@ -122,28 +124,168 @@ static struct pci_device_id snd_als4000_ids[] = {
 
 MODULE_DEVICE_TABLE(pci, snd_als4000_ids);
 
-static inline void snd_als4000_gcr_write_addr(unsigned long port, u32 reg, u32 val)
+enum als4k_iobase_t {
+	/* IOx: B == Byte, W = Word, D = DWord; SPECS_PAGE: 37 */
+	ALS4K_IOD_00_AC97_ACCESS = 0x00,
+	ALS4K_IOW_04_AC97_READ = 0x04,
+	ALS4K_IOB_06_AC97_STATUS = 0x06,
+	ALS4K_IOB_07_IRQSTATUS = 0x07,
+	ALS4K_IOD_08_GCR_DATA = 0x08,
+	ALS4K_IOB_0C_GCR_INDEX = 0x0c,
+	ALS4K_IOB_0E_IRQTYPE_SB_CR1E_MPU = 0x0e,
+	ALS4K_IOB_10_ADLIB_ADDR0 = 0x10,
+	ALS4K_IOB_11_ADLIB_ADDR1 = 0x11,
+	ALS4K_IOB_12_ADLIB_ADDR2 = 0x12,
+	ALS4K_IOB_13_ADLIB_ADDR3 = 0x13,
+	ALS4K_IOB_14_MIXER_INDEX = 0x14,
+	ALS4K_IOB_15_MIXER_DATA = 0x15,
+	ALS4K_IOB_16_ESP_RESET = 0x16,
+	ALS4K_IOB_16_ACK_FOR_CR1E = 0x16, /* 2nd function */
+	ALS4K_IOB_18_OPL_ADDR0 = 0x18,
+	ALS4K_IOB_19_OPL_ADDR1 = 0x19,
+	ALS4K_IOB_1A_ESP_RD_DATA = 0x1a,
+	ALS4K_IOB_1C_ESP_CMD_DATA = 0x1c,
+	ALS4K_IOB_1C_ESP_WR_STATUS = 0x1c, /* 2nd function */
+	ALS4K_IOB_1E_ESP_RD_STATUS8 = 0x1e,
+	ALS4K_IOB_1F_ESP_RD_STATUS16 = 0x1f,
+	ALS4K_IOB_20_ESP_GAMEPORT_200 = 0x20,
+	ALS4K_IOB_21_ESP_GAMEPORT_201 = 0x21,
+	ALS4K_IOB_30_MIDI_DATA = 0x30,
+	ALS4K_IOB_31_MIDI_STATUS = 0x31,
+	ALS4K_IOB_31_MIDI_COMMAND = 0x31, /* 2nd function */
+};
+
+enum als4k_iobase_0e_t {
+	ALS4K_IOB_0E_MPU_IRQ = 0x10,
+	ALS4K_IOB_0E_CR1E_IRQ = 0x40,
+	ALS4K_IOB_0E_SB_DMA_IRQ = 0x80,
+};
+
+enum als4k_gcr_t { /* all registers 32bit wide; SPECS_PAGE: 38 to 42 */
+	ALS4K_GCR8C_MISC_CTRL = 0x8c,
+	ALS4K_GCR90_TEST_MODE_REG = 0x90,
+	ALS4K_GCR91_DMA0_ADDR = 0x91,
+	ALS4K_GCR92_DMA0_MODE_COUNT = 0x92,
+	ALS4K_GCR93_DMA1_ADDR = 0x93,
+	ALS4K_GCR94_DMA1_MODE_COUNT = 0x94,
+	ALS4K_GCR95_DMA3_ADDR = 0x95,
+	ALS4K_GCR96_DMA3_MODE_COUNT = 0x96,
+	ALS4K_GCR99_DMA_EMULATION_CTRL = 0x99,
+	ALS4K_GCRA0_FIFO1_CURRENT_ADDR = 0xa0,
+	ALS4K_GCRA1_FIFO1_STATUS_BYTECOUNT = 0xa1,
+	ALS4K_GCRA2_FIFO2_PCIADDR = 0xa2,
+	ALS4K_GCRA3_FIFO2_COUNT = 0xa3,
+	ALS4K_GCRA4_FIFO2_CURRENT_ADDR = 0xa4,
+	ALS4K_GCRA5_FIFO1_STATUS_BYTECOUNT = 0xa5,
+	ALS4K_GCRA6_PM_CTRL = 0xa6,
+	ALS4K_GCRA7_PCI_ACCESS_STORAGE = 0xa7,
+	ALS4K_GCRA8_LEGACY_CFG1 = 0xa8,
+	ALS4K_GCRA9_LEGACY_CFG2 = 0xa9,
+	ALS4K_GCRFF_DUMMY_SCRATCH = 0xff,
+};
+
+enum als4k_gcr8c_t {
+	ALS4K_GCR8C_IRQ_MASK_CTRL_ENABLE = 0x8000,
+	ALS4K_GCR8C_CHIP_REV_MASK = 0xf0000
+};
+
+static inline void snd_als4k_iobase_writeb(unsigned long iobase,
+						enum als4k_iobase_t reg,
+						u8 val)
+{
+	outb(val, iobase + reg);
+}
+
+static inline void snd_als4k_iobase_writel(unsigned long iobase,
+						enum als4k_iobase_t reg,
+						u32 val)
+{
+	outl(val, iobase + reg);
+}
+
+static inline u8 snd_als4k_iobase_readb(unsigned long iobase,
+						enum als4k_iobase_t reg)
+{
+	return inb(iobase + reg);
+}
+
+static inline u32 snd_als4k_iobase_readl(unsigned long iobase,
+						enum als4k_iobase_t reg)
+{
+	return inl(iobase + reg);
+}
+
+static inline void snd_als4k_gcr_write_addr(unsigned long iobase,
+						 enum als4k_gcr_t reg,
+						 u32 val)
 {
-	outb(reg, port+0x0c);
-	outl(val, port+0x08);
+	snd_als4k_iobase_writeb(iobase, ALS4K_IOB_0C_GCR_INDEX, reg);
+	snd_als4k_iobase_writel(iobase, ALS4K_IOD_08_GCR_DATA, val);
 }
 
-static inline void snd_als4000_gcr_write(struct snd_sb *sb, u32 reg, u32 val)
+static inline void snd_als4k_gcr_write(struct snd_sb *sb,
+					 enum als4k_gcr_t reg,
+					 u32 val)
 {
-	snd_als4000_gcr_write_addr(sb->alt_port, reg, val);
+	snd_als4k_gcr_write_addr(sb->alt_port, reg, val);
 }	
 
-static inline u32 snd_als4000_gcr_read_addr(unsigned long port, u32 reg)
+static inline u32 snd_als4k_gcr_read_addr(unsigned long iobase,
+						 enum als4k_gcr_t reg)
 {
-	outb(reg, port+0x0c);
-	return inl(port+0x08);
+	/* SPECS_PAGE: 37/38 */
+	snd_als4k_iobase_writeb(iobase, ALS4K_IOB_0C_GCR_INDEX, reg);
+	return snd_als4k_iobase_readl(iobase, ALS4K_IOD_08_GCR_DATA);
 }
 
-static inline u32 snd_als4000_gcr_read(struct snd_sb *sb, u32 reg)
+static inline u32 snd_als4k_gcr_read(struct snd_sb *sb, enum als4k_gcr_t reg)
 {
-	return snd_als4000_gcr_read_addr(sb->alt_port, reg);
+	return snd_als4k_gcr_read_addr(sb->alt_port, reg);
 }
 
+enum als4k_cr_t { /* all registers 8bit wide; SPECS_PAGE: 20 to 23 */
+	ALS4K_CR0_SB_CONFIG = 0x00,
+	ALS4K_CR2_MISC_CONTROL = 0x02,
+	ALS4K_CR3_CONFIGURATION = 0x03,
+	ALS4K_CR17_FIFO_STATUS = 0x17,
+	ALS4K_CR18_ESP_MAJOR_VERSION = 0x18,
+	ALS4K_CR19_ESP_MINOR_VERSION = 0x19,
+	ALS4K_CR1A_MPU401_UART_MODE_CONTROL = 0x1a,
+	ALS4K_CR1C_FIFO2_BLOCK_LENGTH_LO = 0x1c,
+	ALS4K_CR1D_FIFO2_BLOCK_LENGTH_HI = 0x1d,
+	ALS4K_CR1E_FIFO2_CONTROL = 0x1e, /* secondary PCM FIFO (recording) */
+	ALS4K_CR3A_MISC_CONTROL = 0x3a,
+	ALS4K_CR3B_CRC32_BYTE0 = 0x3b, /* for testing, activate via CR3A */
+	ALS4K_CR3C_CRC32_BYTE1 = 0x3c,
+	ALS4K_CR3D_CRC32_BYTE2 = 0x3d,
+	ALS4K_CR3E_CRC32_BYTE3 = 0x3e,
+};
+
+enum als4k_cr0_t {
+	ALS4K_CR0_DMA_CONTIN_MODE_CTRL = 0x02, /* IRQ/FIFO controlled for 0/1 */
+	ALS4K_CR0_DMA_90H_MODE_CTRL = 0x04, /* IRQ/FIFO controlled for 0/1 */
+	ALS4K_CR0_MX80_81_REG_WRITE_ENABLE = 0x80,
+};
+
+static inline void snd_als4_cr_write(struct snd_sb *chip,
+					enum als4k_cr_t reg,
+					u8 data)
+{
+	/* Control Register is reg | 0xc0 (bit 7, 6 set) on sbmixer_index
+	 * NOTE: assumes chip->mixer_lock to be locked externally already!
+	 * SPECS_PAGE: 6 */
+	snd_sbmixer_write(chip, reg | 0xc0, data);
+}
+
+static inline u8 snd_als4_cr_read(struct snd_sb *chip,
+					enum als4k_cr_t reg)
+{
+	/* NOTE: assumes chip->mixer_lock to be locked externally already! */
+	return snd_sbmixer_read(chip, reg | 0xc0);
+}
+
+
+
 static void snd_als4000_set_rate(struct snd_sb *chip, unsigned int rate)
 {
 	if (!(chip->mode & SB_RATE_LOCK)) {
@@ -156,15 +298,19 @@ static void snd_als4000_set_rate(struct snd_sb *chip, unsigned int rate)
 static inline void snd_als4000_set_capture_dma(struct snd_sb *chip,
 					       dma_addr_t addr, unsigned size)
 {
-	snd_als4000_gcr_write(chip, 0xa2, addr);
-	snd_als4000_gcr_write(chip, 0xa3, (size-1));
+	/* SPECS_PAGE: 40 */
+	snd_als4k_gcr_write(chip, ALS4K_GCRA2_FIFO2_PCIADDR, addr);
+	snd_als4k_gcr_write(chip, ALS4K_GCRA3_FIFO2_COUNT, (size-1));
 }
 
 static inline void snd_als4000_set_playback_dma(struct snd_sb *chip,
-						dma_addr_t addr, unsigned size)
+						dma_addr_t addr,
+						unsigned size)
 {
-	snd_als4000_gcr_write(chip, 0x91, addr);
-	snd_als4000_gcr_write(chip, 0x92, (size-1)|0x180000);
+	/* SPECS_PAGE: 38 */
+	snd_als4k_gcr_write(chip, ALS4K_GCR91_DMA0_ADDR, addr);
+	snd_als4k_gcr_write(chip, ALS4K_GCR92_DMA0_MODE_COUNT,
+							(size-1)|0x180000);
 }
 
 #define ALS4000_FORMAT_SIGNED	(1<<0)
@@ -248,7 +394,7 @@ static int snd_als4000_capture_prepare(struct snd_pcm_substream *substream)
 	count = snd_pcm_lib_period_bytes(substream);
 	
 	if (chip->capture_format & ALS4000_FORMAT_16BIT)
-		count >>=1;
+		count >>= 1;
 	count--;
 
 	spin_lock_irq(&chip->reg_lock);
@@ -256,8 +402,8 @@ static int snd_als4000_capture_prepare(struct snd_pcm_substream *substream)
 	snd_als4000_set_capture_dma(chip, runtime->dma_addr, size);
 	spin_unlock_irq(&chip->reg_lock);
 	spin_lock_irq(&chip->mixer_lock);
-	snd_sbmixer_write(chip, 0xdc, count);
-	snd_sbmixer_write(chip, 0xdd, count>>8);
+	snd_als4_cr_write(chip, ALS4K_CR1C_FIFO2_BLOCK_LENGTH_LO, count & 0xff);
+	snd_als4_cr_write(chip, ALS4K_CR1D_FIFO2_BLOCK_LENGTH_HI, count >> 8);
 	spin_unlock_irq(&chip->mixer_lock);
 	return 0;
 }
@@ -275,7 +421,7 @@ static int snd_als4000_playback_prepare(struct snd_pcm_substream *substream)
 	count = snd_pcm_lib_period_bytes(substream);
 	
 	if (chip->playback_format & ALS4000_FORMAT_16BIT)
-		count >>=1;
+		count >>= 1;
 	count--;
 	
 	/* FIXME: from second playback on, there's a lot more clicks and pops
@@ -292,8 +438,8 @@ static int snd_als4000_playback_prepare(struct snd_pcm_substream *substream)
 	/* snd_sbdsp_command(chip, SB_DSP_SPEAKER_ON); */
 	snd_sbdsp_command(chip, playback_cmd(chip).dsp_cmd);
 	snd_sbdsp_command(chip, playback_cmd(chip).format);
-	snd_sbdsp_command(chip, count);
-	snd_sbdsp_command(chip, count>>8);
+	snd_sbdsp_command(chip, count & 0xff);
+	snd_sbdsp_command(chip, count >> 8);
 	snd_sbdsp_command(chip, playback_cmd(chip).dma_off);	
 	spin_unlock_irq(&chip->reg_lock);
 	
@@ -305,17 +451,25 @@ static int snd_als4000_capture_trigger(struct snd_pcm_substream *substream, int
 	struct snd_sb *chip = snd_pcm_substream_chip(substream);
 	int result = 0;
 	
+	/* FIXME race condition in here!!!
+	   chip->mode non-atomic update gets consistently protected
+	   by reg_lock always, _except_ for this place!!
+	   Probably need to take reg_lock as outer (or inner??) lock, too.
+	   (or serialize both lock operations? probably not, though... - racy?)
+	*/
 	spin_lock(&chip->mixer_lock);
 	switch (cmd) {
 	case SNDRV_PCM_TRIGGER_START:
 	case SNDRV_PCM_TRIGGER_RESUME:
 		chip->mode |= SB_RATE_LOCK_CAPTURE;
-		snd_sbmixer_write(chip, 0xde, capture_cmd(chip));
+		snd_als4_cr_write(chip, ALS4K_CR1E_FIFO2_CONTROL,
+							 capture_cmd(chip));
 		break;
 	case SNDRV_PCM_TRIGGER_STOP:
 	case SNDRV_PCM_TRIGGER_SUSPEND:
 		chip->mode &= ~SB_RATE_LOCK_CAPTURE;
-		snd_sbmixer_write(chip, 0xde, 0);
+		snd_als4_cr_write(chip, ALS4K_CR1E_FIFO2_CONTROL,
+							 capture_cmd(chip));
 		break;
 	default:
 		result = -EINVAL;
@@ -356,8 +510,9 @@ static snd_pcm_uframes_t snd_als4000_capture_pointer(struct snd_pcm_substream *s
 	unsigned int result;
 
 	spin_lock(&chip->reg_lock);	
-	result = snd_als4000_gcr_read(chip, 0xa4) & 0xffff;
+	result = snd_als4k_gcr_read(chip, ALS4K_GCRA4_FIFO2_CURRENT_ADDR);
 	spin_unlock(&chip->reg_lock);
+	result &= 0xffff;
 	return bytes_to_frames( substream->runtime, result );
 }
 
@@ -367,8 +522,9 @@ static snd_pcm_uframes_t snd_als4000_playback_pointer(struct snd_pcm_substream *
 	unsigned result;
 
 	spin_lock(&chip->reg_lock);	
-	result = snd_als4000_gcr_read(chip, 0xa0) & 0xffff;
+	result = snd_als4k_gcr_read(chip, ALS4K_GCRA0_FIFO1_CURRENT_ADDR);
 	spin_unlock(&chip->reg_lock);
+	result &= 0xffff;
 	return bytes_to_frames( substream->runtime, result );
 }
 
@@ -376,45 +532,63 @@ static snd_pcm_uframes_t snd_als4000_playback_pointer(struct snd_pcm_substream *
  * return IRQ_HANDLED no matter whether we actually had an IRQ flag or not).
  * ALS4000a.PDF writes that while ACKing IRQ in PCI block will *not* ACK
  * the IRQ in the SB core, ACKing IRQ in SB block *will* ACK the PCI IRQ
- * register (alt_port + 0x0e). Probably something could be optimized here to
- * query/write one register only...
+ * register (alt_port + ALS4K_IOB_0E_IRQTYPE_SB_CR1E_MPU). Probably something
+ * could be optimized here to query/write one register only...
  * And even if both registers need to be queried, then there's still the
  * question of whether it's actually correct to ACK PCI IRQ before reading
  * SB IRQ like we do now, since ALS4000a.PDF mentions that PCI IRQ will *clear*
  * SB IRQ status.
+ * (hmm, SPECS_PAGE: 38 mentions it the other way around!)
  * And do we *really* need the lock here for *reading* SB_DSP4_IRQSTATUS??
  * */
 static irqreturn_t snd_als4000_interrupt(int irq, void *dev_id)
 {
 	struct snd_sb *chip = dev_id;
-	unsigned gcr_status;
-	unsigned sb_status;
-
-	/* find out which bit of the ALS4000 produced the interrupt */
-	gcr_status = inb(chip->alt_port + 0xe);
-
-	if ((gcr_status & 0x80) && (chip->playback_substream)) /* playback */
+	unsigned pci_irqstatus;
+	unsigned sb_irqstatus;
+
+	/* find out which bit of the ALS4000 PCI block produced the interrupt,
+	   SPECS_PAGE: 38, 5 */
+	pci_irqstatus = snd_als4k_iobase_readb(chip->alt_port,
+				 ALS4K_IOB_0E_IRQTYPE_SB_CR1E_MPU);
+	if ((pci_irqstatus & ALS4K_IOB_0E_SB_DMA_IRQ)
+	 && (chip->playback_substream)) /* playback */
 		snd_pcm_period_elapsed(chip->playback_substream);
-	if ((gcr_status & 0x40) && (chip->capture_substream)) /* capturing */
+	if ((pci_irqstatus & ALS4K_IOB_0E_CR1E_IRQ)
+	 && (chip->capture_substream)) /* capturing */
 		snd_pcm_period_elapsed(chip->capture_substream);
-	if ((gcr_status & 0x10) && (chip->rmidi)) /* MPU401 interrupt */
+	if ((pci_irqstatus & ALS4K_IOB_0E_MPU_IRQ)
+	 && (chip->rmidi)) /* MPU401 interrupt */
 		snd_mpu401_uart_interrupt(irq, chip->rmidi->private_data);
-	/* release the gcr */
-	outb(gcr_status, chip->alt_port + 0xe);
+	/* ACK the PCI block IRQ */
+	snd_als4k_iobase_writeb(chip->alt_port,
+			 ALS4K_IOB_0E_IRQTYPE_SB_CR1E_MPU, pci_irqstatus);
 	
 	spin_lock(&chip->mixer_lock);
-	sb_status = snd_sbmixer_read(chip, SB_DSP4_IRQSTATUS);
+	/* SPECS_PAGE: 20 */
+	sb_irqstatus = snd_sbmixer_read(chip, SB_DSP4_IRQSTATUS);
 	spin_unlock(&chip->mixer_lock);
 	
-	if (sb_status & SB_IRQTYPE_8BIT) 
+	if (sb_irqstatus & SB_IRQTYPE_8BIT)
 		snd_sb_ack_8bit(chip);
-	if (sb_status & SB_IRQTYPE_16BIT) 
+	if (sb_irqstatus & SB_IRQTYPE_16BIT)
 		snd_sb_ack_16bit(chip);
-	if (sb_status & SB_IRQTYPE_MPUIN)
+	if (sb_irqstatus & SB_IRQTYPE_MPUIN)
 		inb(chip->mpu_port);
-	if (sb_status & 0x20)
-		inb(SBP(chip, RESET));
-	return IRQ_HANDLED;
+	if (sb_irqstatus & ALS4K_IRQTYPE_CR1E_DMA)
+		snd_als4k_iobase_readb(chip->alt_port,
+					ALS4K_IOB_16_ACK_FOR_CR1E);
+
+	/* printk(KERN_INFO "als4000: irq 0x%04x 0x%04x\n",
+					 pci_irqstatus, sb_irqstatus); */
+
+	/* only ack the things we actually handled above */
+	return IRQ_RETVAL(
+	     (pci_irqstatus & (ALS4K_IOB_0E_SB_DMA_IRQ|ALS4K_IOB_0E_CR1E_IRQ|
+				ALS4K_IOB_0E_MPU_IRQ))
+	  || (sb_irqstatus & (SB_IRQTYPE_8BIT|SB_IRQTYPE_16BIT|
+				SB_IRQTYPE_MPUIN|ALS4K_IRQTYPE_CR1E_DMA))
+	);
 }
 
 /*****************************************************************/
@@ -526,7 +700,8 @@ static int __devinit snd_als4000_pcm(struct snd_sb *chip, int device)
 	struct snd_pcm *pcm;
 	int err;
 
-	if ((err = snd_pcm_new(chip->card, "ALS4000 DSP", device, 1, 1, &pcm)) < 0)
+	err = snd_pcm_new(chip->card, "ALS4000 DSP", device, 1, 1, &pcm);
+	if (err < 0)
 		return err;
 	pcm->private_data = chip;
 	pcm->info_flags = SNDRV_PCM_INFO_JOINT_DUPLEX;
@@ -543,48 +718,55 @@ static int __devinit snd_als4000_pcm(struct snd_sb *chip, int device)
 
 /******************************************************************/
 
-static void snd_als4000_set_addr(unsigned long gcr,
-					unsigned int sb,
-					unsigned int mpu,
-					unsigned int opl,
-					unsigned int game)
+static void snd_als4000_set_addr(unsigned long iobase,
+					unsigned int sb_io,
+					unsigned int mpu_io,
+					unsigned int opl_io,
+					unsigned int game_io)
 {
-	u32 confA = 0;
-	u32 confB = 0;
-
-	if (mpu > 0)
-		confB |= (mpu | 1) << 16;
-	if (sb > 0)
-		confB |= (sb | 1);
-	if (game > 0)
-		confA |= (game | 1) << 16;
-	if (opl > 0)	
-		confA |= (opl | 1);
-	snd_als4000_gcr_write_addr(gcr, 0xa8, confA);
-	snd_als4000_gcr_write_addr(gcr, 0xa9, confB);
+	u32 cfg1 = 0;
+	u32 cfg2 = 0;
+
+	if (mpu_io > 0)
+		cfg2 |= (mpu_io | 1) << 16;
+	if (sb_io > 0)
+		cfg2 |= (sb_io | 1);
+	if (game_io > 0)
+		cfg1 |= (game_io | 1) << 16;
+	if (opl_io > 0)
+		cfg1 |= (opl_io | 1);
+	snd_als4k_gcr_write_addr(iobase, ALS4K_GCRA8_LEGACY_CFG1, cfg1);
+	snd_als4k_gcr_write_addr(iobase, ALS4K_GCRA9_LEGACY_CFG2, cfg2);
 }
 
 static void snd_als4000_configure(struct snd_sb *chip)
 {
-	unsigned tmp;
+	u8 tmp;
 	int i;
 
 	/* do some more configuration */
 	spin_lock_irq(&chip->mixer_lock);
-	tmp = snd_sbmixer_read(chip, 0xc0);
-	snd_sbmixer_write(chip, 0xc0, tmp|0x80);
-	/* always select DMA channel 0, since we do not actually use DMA */
+	tmp = snd_als4_cr_read(chip, ALS4K_CR0_SB_CONFIG);
+	snd_als4_cr_write(chip, ALS4K_CR0_SB_CONFIG,
+				tmp|ALS4K_CR0_MX80_81_REG_WRITE_ENABLE);
+	/* always select DMA channel 0, since we do not actually use DMA
+	 * SPECS_PAGE: 19/20 */
 	snd_sbmixer_write(chip, SB_DSP4_DMASETUP, SB_DMASETUP_DMA0);
-	snd_sbmixer_write(chip, 0xc0, tmp&0x7f);
+	snd_als4_cr_write(chip, ALS4K_CR0_SB_CONFIG,
+				 tmp & ~ALS4K_CR0_MX80_81_REG_WRITE_ENABLE);
 	spin_unlock_irq(&chip->mixer_lock);
 	
 	spin_lock_irq(&chip->reg_lock);
-	/* magic number. Enables interrupts(?) */
-	snd_als4000_gcr_write(chip, 0x8c, 0x28000);
-	for(i = 0x91; i <= 0x96; ++i)
-		snd_als4000_gcr_write(chip, i, 0);
+	/* enable interrupts */
+	snd_als4k_gcr_write(chip, ALS4K_GCR8C_MISC_CTRL,
+					ALS4K_GCR8C_IRQ_MASK_CTRL_ENABLE);
+
+	/* SPECS_PAGE: 39 */
+	for (i = ALS4K_GCR91_DMA0_ADDR; i <= ALS4K_GCR96_DMA3_MODE_COUNT; ++i)
+		snd_als4k_gcr_write(chip, i, 0);
 	
-	snd_als4000_gcr_write(chip, 0x99, snd_als4000_gcr_read(chip, 0x99));
+	snd_als4k_gcr_write(chip, ALS4K_GCR99_DMA_EMULATION_CTRL,
+		snd_als4k_gcr_read(chip, ALS4K_GCR99_DMA_EMULATION_CTRL));
 	spin_unlock_irq(&chip->reg_lock);
 }
 
@@ -628,7 +810,7 @@ static int __devinit snd_als4000_create_gameport(struct snd_card_als4000 *acard,
 	gameport_set_port_data(gp, r);
 
 	/* Enable legacy joystick port */
-	snd_als4000_set_addr(acard->gcr, 0, 0, 0, 1);
+	snd_als4000_set_addr(acard->iobase, 0, 0, 0, 1);
 
 	gameport_register_port(acard->gameport);
 
@@ -643,7 +825,9 @@ static void snd_als4000_free_gameport(struct snd_card_als4000 *acard)
 		gameport_unregister_port(acard->gameport);
 		acard->gameport = NULL;
 
-		snd_als4000_set_addr(acard->gcr, 0, 0, 0, 0); /* disable joystick */
+		/* disable joystick */
+		snd_als4000_set_addr(acard->iobase, 0, 0, 0, 0);
+
 		release_and_free_resource(r);
 	}
 }
@@ -654,10 +838,10 @@ static inline void snd_als4000_free_gameport(struct snd_card_als4000 *acard) { }
 
 static void snd_card_als4000_free( struct snd_card *card )
 {
-	struct snd_card_als4000 * acard = (struct snd_card_als4000 *)card->private_data;
+	struct snd_card_als4000 *acard = card->private_data;
 
 	/* make sure that interrupts are disabled */
-	snd_als4000_gcr_write_addr( acard->gcr, 0x8c, 0);
+	snd_als4k_gcr_write_addr(acard->iobase, ALS4K_GCR8C_MISC_CTRL, 0);
 	/* free resources */
 	snd_als4000_free_gameport(acard);
 	pci_release_regions(acard->pci);
@@ -670,7 +854,7 @@ static int __devinit snd_card_als4000_probe(struct pci_dev *pci,
 	static int dev;
 	struct snd_card *card;
 	struct snd_card_als4000 *acard;
-	unsigned long gcr;
+	unsigned long iobase;
 	struct snd_sb *chip;
 	struct snd_opl3 *opl3;
 	unsigned short word;
@@ -699,31 +883,32 @@ static int __devinit snd_card_als4000_probe(struct pci_dev *pci,
 		pci_disable_device(pci);
 		return err;
 	}
-	gcr = pci_resource_start(pci, 0);
+	iobase = pci_resource_start(pci, 0);
 
 	pci_read_config_word(pci, PCI_COMMAND, &word);
 	pci_write_config_word(pci, PCI_COMMAND, word | PCI_COMMAND_IO);
 	pci_set_master(pci);
 	
 	card = snd_card_new(index[dev], id[dev], THIS_MODULE, 
-			    sizeof( struct snd_card_als4000 ) );
+			    sizeof(*acard) /* private_data: acard */);
 	if (card == NULL) {
 		pci_release_regions(pci);
 		pci_disable_device(pci);
 		return -ENOMEM;
 	}
 
-	acard = (struct snd_card_als4000 *)card->private_data;
+	acard = card->private_data;
 	acard->pci = pci;
-	acard->gcr = gcr;
+	acard->iobase = iobase;
 	card->private_free = snd_card_als4000_free;
 
 	/* disable all legacy ISA stuff */
-	snd_als4000_set_addr(acard->gcr, 0, 0, 0, 0);
+	snd_als4000_set_addr(acard->iobase, 0, 0, 0, 0);
 
 	if ((err = snd_sbdsp_create(card,
-				    gcr + 0x10,
+				    iobase + ALS4K_IOB_10_ADLIB_ADDR0,
 				    pci->irq,
+		/* internally registered as IRQF_SHARED in case of ALS4000 SB */
 				    snd_als4000_interrupt,
 				    -1,
 				    -1,
@@ -734,7 +919,7 @@ static int __devinit snd_card_als4000_probe(struct pci_dev *pci,
 	acard->chip = chip;
 
 	chip->pci = pci;
-	chip->alt_port = gcr;
+	chip->alt_port = iobase;
 	snd_card_set_dev(card, &pci->dev);
 
 	snd_als4000_configure(chip);
@@ -745,11 +930,18 @@ static int __devinit snd_card_als4000_probe(struct pci_dev *pci,
 		card->shortname, chip->alt_port, chip->irq);
 
 	if ((err = snd_mpu401_uart_new( card, 0, MPU401_HW_ALS4000,
-				        gcr+0x30, MPU401_INFO_INTEGRATED,
+					iobase + ALS4K_IOB_30_MIDI_DATA,
+					MPU401_INFO_INTEGRATED,
 					pci->irq, 0, &chip->rmidi)) < 0) {
-		printk(KERN_ERR "als4000: no MPU-401 device at 0x%lx?\n", gcr+0x30);
+		printk(KERN_ERR "als4000: no MPU-401 device at 0x%lx?\n",
+				iobase + ALS4K_IOB_30_MIDI_DATA);
 		goto out_err;
 	}
+	/* FIXME: ALS4000 has interesting MPU401 configuration features
+	 * at ALS4K_CR1A_MPU401_UART_MODE_CONTROL
+	 * (pass-thru / UART switching, fast MIDI clock, etc.),
+	 * however there doesn't seem to be an ALSA API for this...
+	 * SPECS_PAGE: 21 */
 
 	if ((err = snd_als4000_pcm(chip, 0)) < 0) {
 		goto out_err;
@@ -758,10 +950,13 @@ static int __devinit snd_card_als4000_probe(struct pci_dev *pci,
 		goto out_err;
 	}	    
 
-	if (snd_opl3_create(card, gcr+0x10, gcr+0x12,
+	if (snd_opl3_create(card,
+				iobase + ALS4K_IOB_10_ADLIB_ADDR0,
+				iobase + ALS4K_IOB_12_ADLIB_ADDR2,
 			    OPL3_HW_AUTO, 1, &opl3) < 0) {
 		printk(KERN_ERR "als4000: no OPL device at 0x%lx-0x%lx?\n",
-			   gcr+0x10, gcr+0x12 );
+			   iobase + ALS4K_IOB_10_ADLIB_ADDR0,
+			   iobase + ALS4K_IOB_12_ADLIB_ADDR2);
 	} else {
 		if ((err = snd_opl3_hwdep_new(opl3, 0, 1, NULL)) < 0) {
 			goto out_err;
@@ -831,13 +1026,13 @@ static int snd_als4000_resume(struct pci_dev *pci)
 
 #ifdef SUPPORT_JOYSTICK
 	if (acard->gameport)
-		snd_als4000_set_addr(acard->gcr, 0, 0, 0, 1);
+		snd_als4000_set_addr(acard->iobase, 0, 0, 0, 1);
 #endif
 
 	snd_power_change_state(card, SNDRV_CTL_POWER_D0);
 	return 0;
 }
-#endif
+#endif /* CONFIG_PM */
 
 
 static struct pci_driver driver = {