Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 789 insertions, 0 deletions

diff --git a/sound/pci/als4000.c b/sound/pci/als4000.c
new file mode 100644
index 000000000000..f1a5f5723ee6
--- /dev/null
+++ b/sound/pci/als4000.c
@@ -0,0 +1,789 @@
+/*
+ *  card-als4000.c - driver for Avance Logic ALS4000 based soundcards.
+ *  Copyright (C) 2000 by Bart Hartgers <bart@etpmod.phys.tue.nl>,
+ *			  Jaroslav Kysela <perex@suse.cz>
+ *  Copyright (C) 2002 by Andreas Mohr <hw7oshyuv3001@sneakemail.com>
+ *
+ *  Framework borrowed from Massimo Piccioni's card-als100.c.
+ *
+ * NOTES
+ *
+ *  Since Avance does not provide any meaningful documentation, and I
+ *  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.
+ *
+ *  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 
+ *  interface. These subsystems can be mapped into ISA io-port space, 
+ *  using the PCI-interface. In addition, the PCI-bit provides DMA and IRQ 
+ *  services to the subsystems.
+ * 
+ * While ALS4000 is very similar to a SoundBlaster, the differences in
+ * DMA and capturing require more changes to the SoundBlaster than
+ * desirable, so I made this separate driver.
+ * 
+ * The ALS4000 can do real full duplex playback/capture.
+ *
+ * FMDAC:
+ * - 0x4f -> port 0x14
+ * - port 0x15 |= 1
+ *
+ * Enable/disable 3D sound:
+ * - 0x50 -> port 0x14
+ * - change bit 6 (0x40) of port 0x15
+ *
+ * Set QSound:
+ * - 0xdb -> port 0x14
+ * - set port 0x15:
+ *   0x3e (mode 3), 0x3c (mode 2), 0x3a (mode 1), 0x38 (mode 0)
+ *
+ * Set KSound:
+ * - value -> some port 0x0c0d
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ */
+
+#include <sound/driver.h>
+#include <asm/io.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/slab.h>
+#include <linux/gameport.h>
+#include <linux/moduleparam.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/rawmidi.h>
+#include <sound/mpu401.h>
+#include <sound/opl3.h>
+#include <sound/sb.h>
+#include <sound/initval.h>
+
+MODULE_AUTHOR("Bart Hartgers <bart@etpmod.phys.tue.nl>");
+MODULE_DESCRIPTION("Avance Logic ALS4000");
+MODULE_LICENSE("GPL");
+MODULE_SUPPORTED_DEVICE("{{Avance Logic,ALS4000}}");
+
+#if defined(CONFIG_GAMEPORT) || (defined(MODULE) && defined(CONFIG_GAMEPORT_MODULE))
+#define SUPPORT_JOYSTICK 1
+#endif
+
+static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;	/* Index 0-MAX */
+static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;	/* ID for this card */
+static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;	/* Enable this card */
+#ifdef SUPPORT_JOYSTICK
+static int joystick_port[SNDRV_CARDS];
+#endif
+
+module_param_array(index, int, NULL, 0444);
+MODULE_PARM_DESC(index, "Index value for ALS4000 soundcard.");
+module_param_array(id, charp, NULL, 0444);
+MODULE_PARM_DESC(id, "ID string for ALS4000 soundcard.");
+module_param_array(enable, bool, NULL, 0444);
+MODULE_PARM_DESC(enable, "Enable ALS4000 soundcard.");
+#ifdef SUPPORT_JOYSTICK
+module_param_array(joystick_port, int, NULL, 0444);
+MODULE_PARM_DESC(joystick_port, "Joystick port address for ALS4000 soundcard. (0 = disabled)");
+#endif
+
+typedef struct {
+	struct pci_dev *pci;
+	unsigned long gcr;
+#ifdef SUPPORT_JOYSTICK
+	struct gameport *gameport;
+#endif
+} snd_card_als4000_t;
+
+static struct pci_device_id snd_als4000_ids[] = {
+	{ 0x4005, 0x4000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0, },   /* ALS4000 */
+	{ 0, }
+};
+
+MODULE_DEVICE_TABLE(pci, snd_als4000_ids);
+
+static inline void snd_als4000_gcr_write_addr(unsigned long port, u32 reg, u32 val)
+{
+	outb(reg, port+0x0c);
+	outl(val, port+0x08);
+}
+
+static inline void snd_als4000_gcr_write(sb_t *sb, u32 reg, u32 val)
+{
+	snd_als4000_gcr_write_addr(sb->alt_port, reg, val);
+}	
+
+static inline u32 snd_als4000_gcr_read_addr(unsigned long port, u32 reg)
+{
+	outb(reg, port+0x0c);
+	return inl(port+0x08);
+}
+
+static inline u32 snd_als4000_gcr_read(sb_t *sb, u32 reg)
+{
+	return snd_als4000_gcr_read_addr(sb->alt_port, reg);
+}
+
+static void snd_als4000_set_rate(sb_t *chip, unsigned int rate)
+{
+	if (!(chip->mode & SB_RATE_LOCK)) {
+		snd_sbdsp_command(chip, SB_DSP_SAMPLE_RATE_OUT);
+		snd_sbdsp_command(chip, rate>>8);
+		snd_sbdsp_command(chip, rate);
+	}
+}
+
+static void snd_als4000_set_capture_dma(sb_t *chip, dma_addr_t addr, unsigned size)
+{
+	snd_als4000_gcr_write(chip, 0xa2, addr);
+	snd_als4000_gcr_write(chip, 0xa3, (size-1));
+}
+
+static void snd_als4000_set_playback_dma(sb_t *chip, dma_addr_t addr, unsigned size)
+{
+	snd_als4000_gcr_write(chip, 0x91, addr);
+	snd_als4000_gcr_write(chip, 0x92, (size-1)|0x180000);
+}
+
+#define ALS4000_FORMAT_SIGNED	(1<<0)
+#define ALS4000_FORMAT_16BIT	(1<<1)
+#define ALS4000_FORMAT_STEREO	(1<<2)
+
+static int snd_als4000_get_format(snd_pcm_runtime_t *runtime)
+{
+	int result;
+
+	result = 0;
+	if (snd_pcm_format_signed(runtime->format))
+		result |= ALS4000_FORMAT_SIGNED;
+	if (snd_pcm_format_physical_width(runtime->format) == 16)
+		result |= ALS4000_FORMAT_16BIT;
+	if (runtime->channels > 1)
+		result |= ALS4000_FORMAT_STEREO;
+	return result;
+}
+
+/* structure for setting up playback */
+static struct {
+	unsigned char dsp_cmd, dma_on, dma_off, format;
+} playback_cmd_vals[]={
+/* ALS4000_FORMAT_U8_MONO */
+{ SB_DSP4_OUT8_AI, SB_DSP_DMA8_ON, SB_DSP_DMA8_OFF, SB_DSP4_MODE_UNS_MONO },
+/* ALS4000_FORMAT_S8_MONO */	
+{ SB_DSP4_OUT8_AI, SB_DSP_DMA8_ON, SB_DSP_DMA8_OFF, SB_DSP4_MODE_SIGN_MONO },
+/* ALS4000_FORMAT_U16L_MONO */
+{ SB_DSP4_OUT16_AI, SB_DSP_DMA16_ON, SB_DSP_DMA16_OFF, SB_DSP4_MODE_UNS_MONO },
+/* ALS4000_FORMAT_S16L_MONO */
+{ SB_DSP4_OUT16_AI, SB_DSP_DMA16_ON, SB_DSP_DMA16_OFF, SB_DSP4_MODE_SIGN_MONO },
+/* ALS4000_FORMAT_U8_STEREO */
+{ SB_DSP4_OUT8_AI, SB_DSP_DMA8_ON, SB_DSP_DMA8_OFF, SB_DSP4_MODE_UNS_STEREO },
+/* ALS4000_FORMAT_S8_STEREO */	
+{ SB_DSP4_OUT8_AI, SB_DSP_DMA8_ON, SB_DSP_DMA8_OFF, SB_DSP4_MODE_SIGN_STEREO },
+/* ALS4000_FORMAT_U16L_STEREO */
+{ SB_DSP4_OUT16_AI, SB_DSP_DMA16_ON, SB_DSP_DMA16_OFF, SB_DSP4_MODE_UNS_STEREO },
+/* ALS4000_FORMAT_S16L_STEREO */
+{ SB_DSP4_OUT16_AI, SB_DSP_DMA16_ON, SB_DSP_DMA16_OFF, SB_DSP4_MODE_SIGN_STEREO },
+};
+#define playback_cmd(chip) (playback_cmd_vals[(chip)->playback_format])
+
+/* structure for setting up capture */
+enum { CMD_WIDTH8=0x04, CMD_SIGNED=0x10, CMD_MONO=0x80, CMD_STEREO=0xA0 };
+static unsigned char capture_cmd_vals[]=
+{
+CMD_WIDTH8|CMD_MONO,			/* ALS4000_FORMAT_U8_MONO */
+CMD_WIDTH8|CMD_SIGNED|CMD_MONO,		/* ALS4000_FORMAT_S8_MONO */	
+CMD_MONO,				/* ALS4000_FORMAT_U16L_MONO */
+CMD_SIGNED|CMD_MONO,			/* ALS4000_FORMAT_S16L_MONO */
+CMD_WIDTH8|CMD_STEREO,			/* ALS4000_FORMAT_U8_STEREO */
+CMD_WIDTH8|CMD_SIGNED|CMD_STEREO,	/* ALS4000_FORMAT_S8_STEREO */	
+CMD_STEREO,				/* ALS4000_FORMAT_U16L_STEREO */
+CMD_SIGNED|CMD_STEREO,			/* ALS4000_FORMAT_S16L_STEREO */
+};	
+#define capture_cmd(chip) (capture_cmd_vals[(chip)->capture_format])
+
+static int snd_als4000_hw_params(snd_pcm_substream_t * substream,
+				 snd_pcm_hw_params_t * hw_params)
+{
+	return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
+}
+
+static int snd_als4000_hw_free(snd_pcm_substream_t * substream)
+{
+	snd_pcm_lib_free_pages(substream);
+	return 0;
+}
+
+static int snd_als4000_capture_prepare(snd_pcm_substream_t * substream)
+{
+	unsigned long flags;
+	sb_t *chip = snd_pcm_substream_chip(substream);
+	snd_pcm_runtime_t *runtime = substream->runtime;
+	unsigned long size;
+	unsigned count;
+
+	chip->capture_format = snd_als4000_get_format(runtime);
+		
+	size = snd_pcm_lib_buffer_bytes(substream);
+	count = snd_pcm_lib_period_bytes(substream);
+	
+	if (chip->capture_format & ALS4000_FORMAT_16BIT)
+		count >>=1;
+	count--;
+
+	spin_lock_irqsave(&chip->reg_lock, flags);
+	snd_als4000_set_rate(chip, runtime->rate);
+	snd_als4000_set_capture_dma(chip, runtime->dma_addr, size);
+	spin_unlock_irqrestore(&chip->reg_lock, flags);
+	spin_lock_irqsave(&chip->mixer_lock, flags );
+	snd_sbmixer_write(chip, 0xdc, count);
+	snd_sbmixer_write(chip, 0xdd, count>>8);
+	spin_unlock_irqrestore(&chip->mixer_lock, flags );
+	return 0;
+}
+
+static int snd_als4000_playback_prepare(snd_pcm_substream_t *substream)
+{
+	unsigned long flags;
+	sb_t *chip = snd_pcm_substream_chip(substream);
+	snd_pcm_runtime_t *runtime = substream->runtime;
+	unsigned long size;
+	unsigned count;
+
+	chip->playback_format = snd_als4000_get_format(runtime);
+	
+	size = snd_pcm_lib_buffer_bytes(substream);
+	count = snd_pcm_lib_period_bytes(substream);
+	
+	if (chip->playback_format & ALS4000_FORMAT_16BIT)
+		count >>=1;
+	count--;
+	
+	/* FIXME: from second playback on, there's a lot more clicks and pops
+	 * involved here than on first playback. Fiddling with
+	 * tons of different settings didn't help (DMA, speaker on/off,
+	 * reordering, ...). Something seems to get enabled on playback
+	 * that I haven't found out how to disable again, which then causes
+	 * the switching pops to reach the speakers the next time here. */
+	spin_lock_irqsave(&chip->reg_lock, flags);
+	snd_als4000_set_rate(chip, runtime->rate);
+	snd_als4000_set_playback_dma(chip, runtime->dma_addr, size);
+	
+	/* SPEAKER_ON not needed, since dma_on seems to also enable speaker */
+	/* 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, playback_cmd(chip).dma_off);	
+	spin_unlock_irqrestore(&chip->reg_lock, flags);
+	
+	return 0;
+}
+
+static int snd_als4000_capture_trigger(snd_pcm_substream_t * substream, int cmd)
+{
+	sb_t *chip = snd_pcm_substream_chip(substream);
+	int result = 0;
+	
+	spin_lock(&chip->mixer_lock);
+	if (cmd == SNDRV_PCM_TRIGGER_START) {
+		chip->mode |= SB_RATE_LOCK_CAPTURE;
+		snd_sbmixer_write(chip, 0xde, capture_cmd(chip));
+	} else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
+		chip->mode &= ~SB_RATE_LOCK_CAPTURE;
+		snd_sbmixer_write(chip, 0xde, 0);
+	} else {
+		result = -EINVAL;
+	}
+	spin_unlock(&chip->mixer_lock);
+	return result;
+}
+
+static int snd_als4000_playback_trigger(snd_pcm_substream_t * substream, int cmd)
+{
+	sb_t *chip = snd_pcm_substream_chip(substream);
+	int result = 0;
+
+	spin_lock(&chip->reg_lock);
+	if (cmd == SNDRV_PCM_TRIGGER_START) {
+		chip->mode |= SB_RATE_LOCK_PLAYBACK;
+		snd_sbdsp_command(chip, playback_cmd(chip).dma_on);
+	} else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
+		snd_sbdsp_command(chip, playback_cmd(chip).dma_off);
+		chip->mode &= ~SB_RATE_LOCK_PLAYBACK;
+	} else {
+		result = -EINVAL;
+	}
+	spin_unlock(&chip->reg_lock);
+	return result;
+}
+
+static snd_pcm_uframes_t snd_als4000_capture_pointer(snd_pcm_substream_t * substream)
+{
+	sb_t *chip = snd_pcm_substream_chip(substream);
+	unsigned int result;
+
+	spin_lock(&chip->reg_lock);	
+	result = snd_als4000_gcr_read(chip, 0xa4) & 0xffff;
+	spin_unlock(&chip->reg_lock);
+	return bytes_to_frames( substream->runtime, result );
+}
+
+static snd_pcm_uframes_t snd_als4000_playback_pointer(snd_pcm_substream_t * substream)
+{
+	sb_t *chip = snd_pcm_substream_chip(substream);
+	unsigned result;
+
+	spin_lock(&chip->reg_lock);	
+	result = snd_als4000_gcr_read(chip, 0xa0) & 0xffff;
+	spin_unlock(&chip->reg_lock);
+	return bytes_to_frames( substream->runtime, result );
+}
+
+static irqreturn_t snd_als4000_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+	sb_t *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 */
+		snd_pcm_period_elapsed(chip->playback_substream);
+	if ((gcr_status & 0x40) && (chip->capture_substream)) /* capturing */
+		snd_pcm_period_elapsed(chip->capture_substream);
+	if ((gcr_status & 0x10) && (chip->rmidi)) /* MPU401 interrupt */
+		snd_mpu401_uart_interrupt(irq, chip->rmidi, regs);
+	/* release the gcr */
+	outb(gcr_status, chip->alt_port + 0xe);
+	
+	spin_lock(&chip->mixer_lock);
+	sb_status = snd_sbmixer_read(chip, SB_DSP4_IRQSTATUS);
+	spin_unlock(&chip->mixer_lock);
+	
+	if (sb_status & SB_IRQTYPE_8BIT) 
+		snd_sb_ack_8bit(chip);
+	if (sb_status & SB_IRQTYPE_16BIT) 
+		snd_sb_ack_16bit(chip);
+	if (sb_status & SB_IRQTYPE_MPUIN)
+		inb(chip->mpu_port);
+	if (sb_status & 0x20)
+		inb(SBP(chip, RESET));
+	return IRQ_HANDLED;
+}
+
+/*****************************************************************/
+
+static snd_pcm_hardware_t snd_als4000_playback =
+{
+	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
+				 SNDRV_PCM_INFO_MMAP_VALID),
+	.formats =		SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 |
+				SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE,	/* formats */
+	.rates =		SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
+	.rate_min =		4000,
+	.rate_max =		48000,
+	.channels_min =		1,
+	.channels_max =		2,
+	.buffer_bytes_max =	65536,
+	.period_bytes_min =	64,
+	.period_bytes_max =	65536,
+	.periods_min =		1,
+	.periods_max =		1024,
+	.fifo_size =		0
+};
+
+static snd_pcm_hardware_t snd_als4000_capture =
+{
+	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
+				 SNDRV_PCM_INFO_MMAP_VALID),
+	.formats =		SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 |
+				SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE,	/* formats */
+	.rates =		SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
+	.rate_min =		4000,
+	.rate_max =		48000,
+	.channels_min =		1,
+	.channels_max =		2,
+	.buffer_bytes_max =	65536,
+	.period_bytes_min =	64,
+	.period_bytes_max =	65536,
+	.periods_min =		1,
+	.periods_max =		1024,
+	.fifo_size =		0
+};
+
+/*****************************************************************/
+
+static int snd_als4000_playback_open(snd_pcm_substream_t * substream)
+{
+	sb_t *chip = snd_pcm_substream_chip(substream);
+	snd_pcm_runtime_t *runtime = substream->runtime;
+
+	chip->playback_substream = substream;
+	runtime->hw = snd_als4000_playback;
+	return 0;
+}
+
+static int snd_als4000_playback_close(snd_pcm_substream_t * substream)
+{
+	sb_t *chip = snd_pcm_substream_chip(substream);
+
+	chip->playback_substream = NULL;
+	snd_pcm_lib_free_pages(substream);
+	return 0;
+}
+
+static int snd_als4000_capture_open(snd_pcm_substream_t * substream)
+{
+	sb_t *chip = snd_pcm_substream_chip(substream);
+	snd_pcm_runtime_t *runtime = substream->runtime;
+
+	chip->capture_substream = substream;
+	runtime->hw = snd_als4000_capture;
+	return 0;
+}
+
+static int snd_als4000_capture_close(snd_pcm_substream_t * substream)
+{
+	sb_t *chip = snd_pcm_substream_chip(substream);
+
+	chip->capture_substream = NULL;
+	snd_pcm_lib_free_pages(substream);
+	return 0;
+}
+
+/******************************************************************/
+
+static snd_pcm_ops_t snd_als4000_playback_ops = {
+	.open =		snd_als4000_playback_open,
+	.close =	snd_als4000_playback_close,
+	.ioctl =	snd_pcm_lib_ioctl,
+	.hw_params =	snd_als4000_hw_params,
+	.hw_free =	snd_als4000_hw_free,
+	.prepare =	snd_als4000_playback_prepare,
+	.trigger =	snd_als4000_playback_trigger,
+	.pointer =	snd_als4000_playback_pointer
+};
+
+static snd_pcm_ops_t snd_als4000_capture_ops = {
+	.open =		snd_als4000_capture_open,
+	.close =	snd_als4000_capture_close,
+	.ioctl =	snd_pcm_lib_ioctl,
+	.hw_params =	snd_als4000_hw_params,
+	.hw_free =	snd_als4000_hw_free,
+	.prepare =	snd_als4000_capture_prepare,
+	.trigger =	snd_als4000_capture_trigger,
+	.pointer =	snd_als4000_capture_pointer
+};
+
+static void snd_als4000_pcm_free(snd_pcm_t *pcm)
+{
+	sb_t *chip = pcm->private_data;
+	chip->pcm = NULL;
+	snd_pcm_lib_preallocate_free_for_all(pcm);
+}
+
+static int __devinit snd_als4000_pcm(sb_t *chip, int device)
+{
+	snd_pcm_t *pcm;
+	int err;
+
+	if ((err = snd_pcm_new(chip->card, "ALS4000 DSP", device, 1, 1, &pcm)) < 0)
+		return err;
+	pcm->private_free = snd_als4000_pcm_free;
+	pcm->private_data = chip;
+	pcm->info_flags = SNDRV_PCM_INFO_JOINT_DUPLEX;
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_als4000_playback_ops);
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_als4000_capture_ops);
+
+	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(chip->pci),
+					      64*1024, 64*1024);
+
+	chip->pcm = pcm;
+
+	return 0;
+}
+
+/******************************************************************/
+
+static void snd_als4000_set_addr(unsigned long gcr,
+					unsigned int sb,
+					unsigned int mpu,
+					unsigned int opl,
+					unsigned int game)
+{
+	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);
+}
+
+static void __devinit snd_als4000_configure(sb_t *chip)
+{
+	unsigned 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 */
+	snd_sbmixer_write(chip, SB_DSP4_DMASETUP, SB_DMASETUP_DMA0);
+	snd_sbmixer_write(chip, 0xc0, tmp&0x7f);
+	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);
+	
+	snd_als4000_gcr_write(chip, 0x99, snd_als4000_gcr_read(chip, 0x99));
+	spin_unlock_irq(&chip->reg_lock);
+}
+
+#ifdef SUPPORT_JOYSTICK
+static int __devinit snd_als4000_create_gameport(snd_card_als4000_t *acard, int dev)
+{
+	struct gameport *gp;
+	struct resource *r;
+	int io_port;
+
+	if (joystick_port[dev] == 0)
+		return -ENODEV;
+
+	if (joystick_port[dev] == 1) { /* auto-detect */
+		for (io_port = 0x200; io_port <= 0x218; io_port += 8) {
+			r = request_region(io_port, 8, "ALS4000 gameport");
+			if (r)
+				break;
+		}
+	} else {
+		io_port = joystick_port[dev];
+		r = request_region(io_port, 8, "ALS4000 gameport");
+	}
+
+	if (!r) {
+		printk(KERN_WARNING "als4000: cannot reserve joystick ports\n");
+		return -EBUSY;
+	}
+
+	acard->gameport = gp = gameport_allocate_port();
+	if (!gp) {
+		printk(KERN_ERR "als4000: cannot allocate memory for gameport\n");
+		release_resource(r);
+		kfree_nocheck(r);
+		return -ENOMEM;
+	}
+
+	gameport_set_name(gp, "ALS4000 Gameport");
+	gameport_set_phys(gp, "pci%s/gameport0", pci_name(acard->pci));
+	gameport_set_dev_parent(gp, &acard->pci->dev);
+	gp->io = io_port;
+	gameport_set_port_data(gp, r);
+
+	/* Enable legacy joystick port */
+	snd_als4000_set_addr(acard->gcr, 0, 0, 0, 1);
+
+	gameport_register_port(acard->gameport);
+
+	return 0;
+}
+
+static void snd_als4000_free_gameport(snd_card_als4000_t *acard)
+{
+	if (acard->gameport) {
+		struct resource *r = gameport_get_port_data(acard->gameport);
+
+		gameport_unregister_port(acard->gameport);
+		acard->gameport = NULL;
+
+		snd_als4000_set_addr(acard->gcr, 0, 0, 0, 0); /* disable joystick */
+		release_resource(r);
+		kfree_nocheck(r);
+	}
+}
+#else
+static inline int snd_als4000_create_gameport(snd_card_als4000_t *acard, int dev) { return -ENOSYS; }
+static inline void snd_als4000_free_gameport(snd_card_als4000_t *acard) { }
+#endif
+
+static void snd_card_als4000_free( snd_card_t *card )
+{
+	snd_card_als4000_t * acard = (snd_card_als4000_t *)card->private_data;
+
+	/* make sure that interrupts are disabled */
+	snd_als4000_gcr_write_addr( acard->gcr, 0x8c, 0);
+	/* free resources */
+	snd_als4000_free_gameport(acard);
+	pci_release_regions(acard->pci);
+	pci_disable_device(acard->pci);
+}
+
+static int __devinit snd_card_als4000_probe(struct pci_dev *pci,
+					  const struct pci_device_id *pci_id)
+{
+	static int dev;
+	snd_card_t *card;
+	snd_card_als4000_t *acard;
+	unsigned long gcr;
+	sb_t *chip;
+	opl3_t *opl3;
+	unsigned short word;
+	int err;
+
+	if (dev >= SNDRV_CARDS)
+		return -ENODEV;
+	if (!enable[dev]) {
+		dev++;
+		return -ENOENT;
+	}
+
+	/* enable PCI device */
+	if ((err = pci_enable_device(pci)) < 0) {
+		return err;
+	}
+	/* check, if we can restrict PCI DMA transfers to 24 bits */
+	if (pci_set_dma_mask(pci, 0x00ffffff) < 0 ||
+	    pci_set_consistent_dma_mask(pci, 0x00ffffff) < 0) {
+		snd_printk("architecture does not support 24bit PCI busmaster DMA\n");
+		pci_disable_device(pci);
+		return -ENXIO;
+	}
+
+	if ((err = pci_request_regions(pci, "ALS4000")) < 0) {
+		pci_disable_device(pci);
+		return err;
+	}
+	gcr = 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( snd_card_als4000_t ) );
+	if (card == NULL) {
+		pci_release_regions(pci);
+		pci_disable_device(pci);
+		return -ENOMEM;
+	}
+
+	acard = (snd_card_als4000_t *)card->private_data;
+	acard->pci = pci;
+	acard->gcr = gcr;
+	card->private_free = snd_card_als4000_free;
+
+	/* disable all legacy ISA stuff */
+	snd_als4000_set_addr(acard->gcr, 0, 0, 0, 0);
+
+	if ((err = snd_sbdsp_create(card,
+				    gcr + 0x10,
+				    pci->irq,
+				    snd_als4000_interrupt,
+				    -1,
+				    -1,
+				    SB_HW_ALS4000,
+				    &chip)) < 0) {
+		snd_card_free(card);
+		return err;
+	}
+
+	chip->pci = pci;
+	chip->alt_port = gcr;
+	snd_card_set_dev(card, &pci->dev);
+
+	snd_als4000_configure(chip);
+
+	strcpy(card->driver, "ALS4000");
+	strcpy(card->shortname, "Avance Logic ALS4000");
+	sprintf(card->longname, "%s at 0x%lx, irq %i",
+		card->shortname, chip->alt_port, chip->irq);
+
+	if ((err = snd_mpu401_uart_new( card, 0, MPU401_HW_ALS4000,
+				        gcr+0x30, 1, pci->irq, 0,
+				        &chip->rmidi)) < 0) {
+		snd_card_free(card);
+		printk(KERN_ERR "als4000: no MPU-401device at 0x%lx ?\n", gcr+0x30);
+		return err;
+	}
+
+	if ((err = snd_als4000_pcm(chip, 0)) < 0) {
+		snd_card_free(card);
+		return err;
+	}
+	if ((err = snd_sbmixer_new(chip)) < 0) {
+		snd_card_free(card);
+		return err;
+	}	    
+
+	if (snd_opl3_create(card, gcr+0x10, gcr+0x12,
+			    OPL3_HW_AUTO, 1, &opl3) < 0) {
+		printk(KERN_ERR "als4000: no OPL device at 0x%lx-0x%lx ?\n",
+			   gcr+0x10, gcr+0x12 );
+	} else {
+		if ((err = snd_opl3_hwdep_new(opl3, 0, 1, NULL)) < 0) {
+			snd_card_free(card);
+			return err;
+		}
+	}
+
+	snd_als4000_create_gameport(acard, dev);
+
+	if ((err = snd_card_register(card)) < 0) {
+		snd_card_free(card);
+		return err;
+	}
+	pci_set_drvdata(pci, card);
+	dev++;
+	return 0;
+}
+
+static void __devexit snd_card_als4000_remove(struct pci_dev *pci)
+{
+	snd_card_free(pci_get_drvdata(pci));
+	pci_set_drvdata(pci, NULL);
+}
+
+static struct pci_driver driver = {
+	.name = "ALS4000",
+	.id_table = snd_als4000_ids,
+	.probe = snd_card_als4000_probe,
+	.remove = __devexit_p(snd_card_als4000_remove),
+};
+
+static int __init alsa_card_als4000_init(void)
+{
+	return pci_module_init(&driver);
+}
+
+static void __exit alsa_card_als4000_exit(void)
+{
+	pci_unregister_driver(&driver);
+}
+
+module_init(alsa_card_als4000_init)
+module_exit(alsa_card_als4000_exit)