Initial import

1 files changed, 1866 insertions, 0 deletions

diff --git a/sound/pci/es1938.c b/sound/pci/es1938.c
new file mode 100644
index 000000000..e1858d9d2
--- /dev/null
+++ b/sound/pci/es1938.c
@@ -0,0 +1,1866 @@
+/*
+ *  Driver for ESS Solo-1 (ES1938, ES1946, ES1969) soundcard
+ *  Copyright (c) by Jaromir Koutek <miri@punknet.cz>,
+ *                   Jaroslav Kysela <perex@perex.cz>,
+ *                   Thomas Sailer <sailer@ife.ee.ethz.ch>,
+ *                   Abramo Bagnara <abramo@alsa-project.org>,
+ *                   Markus Gruber <gruber@eikon.tum.de>
+ * 
+ * Rewritten from sonicvibes.c source.
+ *
+ *  TODO:
+ *    Rewrite better spinlocks
+ *
+ *
+ *   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
+ *
+ */
+
+/*
+  NOTES:
+  - Capture data is written unaligned starting from dma_base + 1 so I need to
+    disable mmap and to add a copy callback.
+  - After several cycle of the following:
+    while : ; do arecord -d1 -f cd -t raw | aplay -f cd ; done
+    a "playback write error (DMA or IRQ trouble?)" may happen.
+    This is due to playback interrupts not generated.
+    I suspect a timing issue.
+  - Sometimes the interrupt handler is invoked wrongly during playback.
+    This generates some harmless "Unexpected hw_pointer: wrong interrupt
+    acknowledge".
+    I've seen that using small period sizes.
+    Reproducible with:
+    mpg123 test.mp3 &
+    hdparm -t -T /dev/hda
+*/
+
+
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/slab.h>
+#include <linux/gameport.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/io.h>
+#include <sound/core.h>
+#include <sound/control.h>
+#include <sound/pcm.h>
+#include <sound/opl3.h>
+#include <sound/mpu401.h>
+#include <sound/initval.h>
+#include <sound/tlv.h>
+
+MODULE_AUTHOR("Jaromir Koutek <miri@punknet.cz>");
+MODULE_DESCRIPTION("ESS Solo-1");
+MODULE_LICENSE("GPL");
+MODULE_SUPPORTED_DEVICE("{{ESS,ES1938},"
+                "{ESS,ES1946},"
+                "{ESS,ES1969},"
+		"{TerraTec,128i PCI}}");
+
+#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 bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;	/* Enable this card */
+
+module_param_array(index, int, NULL, 0444);
+MODULE_PARM_DESC(index, "Index value for ESS Solo-1 soundcard.");
+module_param_array(id, charp, NULL, 0444);
+MODULE_PARM_DESC(id, "ID string for ESS Solo-1 soundcard.");
+module_param_array(enable, bool, NULL, 0444);
+MODULE_PARM_DESC(enable, "Enable ESS Solo-1 soundcard.");
+
+#define SLIO_REG(chip, x) ((chip)->io_port + ESSIO_REG_##x)
+
+#define SLDM_REG(chip, x) ((chip)->ddma_port + ESSDM_REG_##x)
+
+#define SLSB_REG(chip, x) ((chip)->sb_port + ESSSB_REG_##x)
+
+#define SL_PCI_LEGACYCONTROL		0x40
+#define SL_PCI_CONFIG			0x50
+#define SL_PCI_DDMACONTROL		0x60
+
+#define ESSIO_REG_AUDIO2DMAADDR		0
+#define ESSIO_REG_AUDIO2DMACOUNT	4
+#define ESSIO_REG_AUDIO2MODE		6
+#define ESSIO_REG_IRQCONTROL		7
+
+#define ESSDM_REG_DMAADDR		0x00
+#define ESSDM_REG_DMACOUNT		0x04
+#define ESSDM_REG_DMACOMMAND		0x08
+#define ESSDM_REG_DMASTATUS		0x08
+#define ESSDM_REG_DMAMODE		0x0b
+#define ESSDM_REG_DMACLEAR		0x0d
+#define ESSDM_REG_DMAMASK		0x0f
+
+#define ESSSB_REG_FMLOWADDR		0x00
+#define ESSSB_REG_FMHIGHADDR		0x02
+#define ESSSB_REG_MIXERADDR		0x04
+#define ESSSB_REG_MIXERDATA		0x05
+
+#define ESSSB_IREG_AUDIO1		0x14
+#define ESSSB_IREG_MICMIX		0x1a
+#define ESSSB_IREG_RECSRC		0x1c
+#define ESSSB_IREG_MASTER		0x32
+#define ESSSB_IREG_FM			0x36
+#define ESSSB_IREG_AUXACD		0x38
+#define ESSSB_IREG_AUXB			0x3a
+#define ESSSB_IREG_PCSPEAKER		0x3c
+#define ESSSB_IREG_LINE			0x3e
+#define ESSSB_IREG_SPATCONTROL		0x50
+#define ESSSB_IREG_SPATLEVEL		0x52
+#define ESSSB_IREG_MASTER_LEFT		0x60
+#define ESSSB_IREG_MASTER_RIGHT		0x62
+#define ESSSB_IREG_MPU401CONTROL	0x64
+#define ESSSB_IREG_MICMIXRECORD		0x68
+#define ESSSB_IREG_AUDIO2RECORD		0x69
+#define ESSSB_IREG_AUXACDRECORD		0x6a
+#define ESSSB_IREG_FMRECORD		0x6b
+#define ESSSB_IREG_AUXBRECORD		0x6c
+#define ESSSB_IREG_MONO			0x6d
+#define ESSSB_IREG_LINERECORD		0x6e
+#define ESSSB_IREG_MONORECORD		0x6f
+#define ESSSB_IREG_AUDIO2SAMPLE		0x70
+#define ESSSB_IREG_AUDIO2MODE		0x71
+#define ESSSB_IREG_AUDIO2FILTER		0x72
+#define ESSSB_IREG_AUDIO2TCOUNTL	0x74
+#define ESSSB_IREG_AUDIO2TCOUNTH	0x76
+#define ESSSB_IREG_AUDIO2CONTROL1	0x78
+#define ESSSB_IREG_AUDIO2CONTROL2	0x7a
+#define ESSSB_IREG_AUDIO2		0x7c
+
+#define ESSSB_REG_RESET			0x06
+
+#define ESSSB_REG_READDATA		0x0a
+#define ESSSB_REG_WRITEDATA		0x0c
+#define ESSSB_REG_READSTATUS		0x0c
+
+#define ESSSB_REG_STATUS		0x0e
+
+#define ESS_CMD_EXTSAMPLERATE		0xa1
+#define ESS_CMD_FILTERDIV		0xa2
+#define ESS_CMD_DMACNTRELOADL		0xa4
+#define ESS_CMD_DMACNTRELOADH		0xa5
+#define ESS_CMD_ANALOGCONTROL		0xa8
+#define ESS_CMD_IRQCONTROL		0xb1
+#define ESS_CMD_DRQCONTROL		0xb2
+#define ESS_CMD_RECLEVEL		0xb4
+#define ESS_CMD_SETFORMAT		0xb6
+#define ESS_CMD_SETFORMAT2		0xb7
+#define ESS_CMD_DMACONTROL		0xb8
+#define ESS_CMD_DMATYPE			0xb9
+#define ESS_CMD_OFFSETLEFT		0xba	
+#define ESS_CMD_OFFSETRIGHT		0xbb
+#define ESS_CMD_READREG			0xc0
+#define ESS_CMD_ENABLEEXT		0xc6
+#define ESS_CMD_PAUSEDMA		0xd0
+#define ESS_CMD_ENABLEAUDIO1		0xd1
+#define ESS_CMD_STOPAUDIO1		0xd3
+#define ESS_CMD_AUDIO1STATUS		0xd8
+#define ESS_CMD_CONTDMA			0xd4
+#define ESS_CMD_TESTIRQ			0xf2
+
+#define ESS_RECSRC_MIC		0
+#define ESS_RECSRC_AUXACD	2
+#define ESS_RECSRC_AUXB		5
+#define ESS_RECSRC_LINE		6
+#define ESS_RECSRC_NONE		7
+
+#define DAC1 0x01
+#define ADC1 0x02
+#define DAC2 0x04
+
+/*
+
+ */
+
+#define SAVED_REG_SIZE	32 /* max. number of registers to save */
+
+struct es1938 {
+	int irq;
+
+	unsigned long io_port;
+	unsigned long sb_port;
+	unsigned long vc_port;
+	unsigned long mpu_port;
+	unsigned long game_port;
+	unsigned long ddma_port;
+
+	unsigned char irqmask;
+	unsigned char revision;
+
+	struct snd_kcontrol *hw_volume;
+	struct snd_kcontrol *hw_switch;
+	struct snd_kcontrol *master_volume;
+	struct snd_kcontrol *master_switch;
+
+	struct pci_dev *pci;
+	struct snd_card *card;
+	struct snd_pcm *pcm;
+	struct snd_pcm_substream *capture_substream;
+	struct snd_pcm_substream *playback1_substream;
+	struct snd_pcm_substream *playback2_substream;
+	struct snd_rawmidi *rmidi;
+
+	unsigned int dma1_size;
+	unsigned int dma2_size;
+	unsigned int dma1_start;
+	unsigned int dma2_start;
+	unsigned int dma1_shift;
+	unsigned int dma2_shift;
+	unsigned int last_capture_dmaaddr;
+	unsigned int active;
+
+	spinlock_t reg_lock;
+	spinlock_t mixer_lock;
+        struct snd_info_entry *proc_entry;
+
+#ifdef SUPPORT_JOYSTICK
+	struct gameport *gameport;
+#endif
+#ifdef CONFIG_PM_SLEEP
+	unsigned char saved_regs[SAVED_REG_SIZE];
+#endif
+};
+
+static irqreturn_t snd_es1938_interrupt(int irq, void *dev_id);
+
+static const struct pci_device_id snd_es1938_ids[] = {
+	{ PCI_VDEVICE(ESS, 0x1969), 0, },   /* Solo-1 */
+	{ 0, }
+};
+
+MODULE_DEVICE_TABLE(pci, snd_es1938_ids);
+
+#define RESET_LOOP_TIMEOUT	0x10000
+#define WRITE_LOOP_TIMEOUT	0x10000
+#define GET_LOOP_TIMEOUT	0x01000
+
+/* -----------------------------------------------------------------
+ * Write to a mixer register
+ * -----------------------------------------------------------------*/
+static void snd_es1938_mixer_write(struct es1938 *chip, unsigned char reg, unsigned char val)
+{
+	unsigned long flags;
+	spin_lock_irqsave(&chip->mixer_lock, flags);
+	outb(reg, SLSB_REG(chip, MIXERADDR));
+	outb(val, SLSB_REG(chip, MIXERDATA));
+	spin_unlock_irqrestore(&chip->mixer_lock, flags);
+	dev_dbg(chip->card->dev, "Mixer reg %02x set to %02x\n", reg, val);
+}
+
+/* -----------------------------------------------------------------
+ * Read from a mixer register
+ * -----------------------------------------------------------------*/
+static int snd_es1938_mixer_read(struct es1938 *chip, unsigned char reg)
+{
+	int data;
+	unsigned long flags;
+	spin_lock_irqsave(&chip->mixer_lock, flags);
+	outb(reg, SLSB_REG(chip, MIXERADDR));
+	data = inb(SLSB_REG(chip, MIXERDATA));
+	spin_unlock_irqrestore(&chip->mixer_lock, flags);
+	dev_dbg(chip->card->dev, "Mixer reg %02x now is %02x\n", reg, data);
+	return data;
+}
+
+/* -----------------------------------------------------------------
+ * Write to some bits of a mixer register (return old value)
+ * -----------------------------------------------------------------*/
+static int snd_es1938_mixer_bits(struct es1938 *chip, unsigned char reg,
+				 unsigned char mask, unsigned char val)
+{
+	unsigned long flags;
+	unsigned char old, new, oval;
+	spin_lock_irqsave(&chip->mixer_lock, flags);
+	outb(reg, SLSB_REG(chip, MIXERADDR));
+	old = inb(SLSB_REG(chip, MIXERDATA));
+	oval = old & mask;
+	if (val != oval) {
+		new = (old & ~mask) | (val & mask);
+		outb(new, SLSB_REG(chip, MIXERDATA));
+		dev_dbg(chip->card->dev,
+			"Mixer reg %02x was %02x, set to %02x\n",
+			   reg, old, new);
+	}
+	spin_unlock_irqrestore(&chip->mixer_lock, flags);
+	return oval;
+}
+
+/* -----------------------------------------------------------------
+ * Write command to Controller Registers
+ * -----------------------------------------------------------------*/
+static void snd_es1938_write_cmd(struct es1938 *chip, unsigned char cmd)
+{
+	int i;
+	unsigned char v;
+	for (i = 0; i < WRITE_LOOP_TIMEOUT; i++) {
+		if (!(v = inb(SLSB_REG(chip, READSTATUS)) & 0x80)) {
+			outb(cmd, SLSB_REG(chip, WRITEDATA));
+			return;
+		}
+	}
+	dev_err(chip->card->dev,
+		"snd_es1938_write_cmd timeout (0x02%x/0x02%x)\n", cmd, v);
+}
+
+/* -----------------------------------------------------------------
+ * Read the Read Data Buffer
+ * -----------------------------------------------------------------*/
+static int snd_es1938_get_byte(struct es1938 *chip)
+{
+	int i;
+	unsigned char v;
+	for (i = GET_LOOP_TIMEOUT; i; i--)
+		if ((v = inb(SLSB_REG(chip, STATUS))) & 0x80)
+			return inb(SLSB_REG(chip, READDATA));
+	dev_err(chip->card->dev, "get_byte timeout: status 0x02%x\n", v);
+	return -ENODEV;
+}
+
+/* -----------------------------------------------------------------
+ * Write value cmd register
+ * -----------------------------------------------------------------*/
+static void snd_es1938_write(struct es1938 *chip, unsigned char reg, unsigned char val)
+{
+	unsigned long flags;
+	spin_lock_irqsave(&chip->reg_lock, flags);
+	snd_es1938_write_cmd(chip, reg);
+	snd_es1938_write_cmd(chip, val);
+	spin_unlock_irqrestore(&chip->reg_lock, flags);
+	dev_dbg(chip->card->dev, "Reg %02x set to %02x\n", reg, val);
+}
+
+/* -----------------------------------------------------------------
+ * Read data from cmd register and return it
+ * -----------------------------------------------------------------*/
+static unsigned char snd_es1938_read(struct es1938 *chip, unsigned char reg)
+{
+	unsigned char val;
+	unsigned long flags;
+	spin_lock_irqsave(&chip->reg_lock, flags);
+	snd_es1938_write_cmd(chip, ESS_CMD_READREG);
+	snd_es1938_write_cmd(chip, reg);
+	val = snd_es1938_get_byte(chip);
+	spin_unlock_irqrestore(&chip->reg_lock, flags);
+	dev_dbg(chip->card->dev, "Reg %02x now is %02x\n", reg, val);
+	return val;
+}
+
+/* -----------------------------------------------------------------
+ * Write data to cmd register and return old value
+ * -----------------------------------------------------------------*/
+static int snd_es1938_bits(struct es1938 *chip, unsigned char reg, unsigned char mask,
+			   unsigned char val)
+{
+	unsigned long flags;
+	unsigned char old, new, oval;
+	spin_lock_irqsave(&chip->reg_lock, flags);
+	snd_es1938_write_cmd(chip, ESS_CMD_READREG);
+	snd_es1938_write_cmd(chip, reg);
+	old = snd_es1938_get_byte(chip);
+	oval = old & mask;
+	if (val != oval) {
+		snd_es1938_write_cmd(chip, reg);
+		new = (old & ~mask) | (val & mask);
+		snd_es1938_write_cmd(chip, new);
+		dev_dbg(chip->card->dev, "Reg %02x was %02x, set to %02x\n",
+			   reg, old, new);
+	}
+	spin_unlock_irqrestore(&chip->reg_lock, flags);
+	return oval;
+}
+
+/* --------------------------------------------------------------------
+ * Reset the chip
+ * --------------------------------------------------------------------*/
+static void snd_es1938_reset(struct es1938 *chip)
+{
+	int i;
+
+	outb(3, SLSB_REG(chip, RESET));
+	inb(SLSB_REG(chip, RESET));
+	outb(0, SLSB_REG(chip, RESET));
+	for (i = 0; i < RESET_LOOP_TIMEOUT; i++) {
+		if (inb(SLSB_REG(chip, STATUS)) & 0x80) {
+			if (inb(SLSB_REG(chip, READDATA)) == 0xaa)
+				goto __next;
+		}
+	}
+	dev_err(chip->card->dev, "ESS Solo-1 reset failed\n");
+
+     __next:
+	snd_es1938_write_cmd(chip, ESS_CMD_ENABLEEXT);
+
+	/* Demand transfer DMA: 4 bytes per DMA request */
+	snd_es1938_write(chip, ESS_CMD_DMATYPE, 2);
+
+	/* Change behaviour of register A1
+	   4x oversampling
+	   2nd channel DAC asynchronous */                                                      
+	snd_es1938_mixer_write(chip, ESSSB_IREG_AUDIO2MODE, 0x32);
+	/* enable/select DMA channel and IRQ channel */
+	snd_es1938_bits(chip, ESS_CMD_IRQCONTROL, 0xf0, 0x50);
+	snd_es1938_bits(chip, ESS_CMD_DRQCONTROL, 0xf0, 0x50);
+	snd_es1938_write_cmd(chip, ESS_CMD_ENABLEAUDIO1);
+	/* Set spatializer parameters to recommended values */
+	snd_es1938_mixer_write(chip, 0x54, 0x8f);
+	snd_es1938_mixer_write(chip, 0x56, 0x95);
+	snd_es1938_mixer_write(chip, 0x58, 0x94);
+	snd_es1938_mixer_write(chip, 0x5a, 0x80);
+}
+
+/* --------------------------------------------------------------------
+ * Reset the FIFOs
+ * --------------------------------------------------------------------*/
+static void snd_es1938_reset_fifo(struct es1938 *chip)
+{
+	outb(2, SLSB_REG(chip, RESET));
+	outb(0, SLSB_REG(chip, RESET));
+}
+
+static struct snd_ratnum clocks[2] = {
+	{
+		.num = 793800,
+		.den_min = 1,
+		.den_max = 128,
+		.den_step = 1,
+	},
+	{
+		.num = 768000,
+		.den_min = 1,
+		.den_max = 128,
+		.den_step = 1,
+	}
+};
+
+static struct snd_pcm_hw_constraint_ratnums hw_constraints_clocks = {
+	.nrats = 2,
+	.rats = clocks,
+};
+
+
+static void snd_es1938_rate_set(struct es1938 *chip, 
+				struct snd_pcm_substream *substream,
+				int mode)
+{
+	unsigned int bits, div0;
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	if (runtime->rate_num == clocks[0].num)
+		bits = 128 - runtime->rate_den;
+	else
+		bits = 256 - runtime->rate_den;
+
+	/* set filter register */
+	div0 = 256 - 7160000*20/(8*82*runtime->rate);
+		
+	if (mode == DAC2) {
+		snd_es1938_mixer_write(chip, 0x70, bits);
+		snd_es1938_mixer_write(chip, 0x72, div0);
+	} else {
+		snd_es1938_write(chip, 0xA1, bits);
+		snd_es1938_write(chip, 0xA2, div0);
+	}
+}
+
+/* --------------------------------------------------------------------
+ * Configure Solo1 builtin DMA Controller
+ * --------------------------------------------------------------------*/
+
+static void snd_es1938_playback1_setdma(struct es1938 *chip)
+{
+	outb(0x00, SLIO_REG(chip, AUDIO2MODE));
+	outl(chip->dma2_start, SLIO_REG(chip, AUDIO2DMAADDR));
+	outw(0, SLIO_REG(chip, AUDIO2DMACOUNT));
+	outw(chip->dma2_size, SLIO_REG(chip, AUDIO2DMACOUNT));
+}
+
+static void snd_es1938_playback2_setdma(struct es1938 *chip)
+{
+	/* Enable DMA controller */
+	outb(0xc4, SLDM_REG(chip, DMACOMMAND));
+	/* 1. Master reset */
+	outb(0, SLDM_REG(chip, DMACLEAR));
+	/* 2. Mask DMA */
+	outb(1, SLDM_REG(chip, DMAMASK));
+	outb(0x18, SLDM_REG(chip, DMAMODE));
+	outl(chip->dma1_start, SLDM_REG(chip, DMAADDR));
+	outw(chip->dma1_size - 1, SLDM_REG(chip, DMACOUNT));
+	/* 3. Unmask DMA */
+	outb(0, SLDM_REG(chip, DMAMASK));
+}
+
+static void snd_es1938_capture_setdma(struct es1938 *chip)
+{
+	/* Enable DMA controller */
+	outb(0xc4, SLDM_REG(chip, DMACOMMAND));
+	/* 1. Master reset */
+	outb(0, SLDM_REG(chip, DMACLEAR));
+	/* 2. Mask DMA */
+	outb(1, SLDM_REG(chip, DMAMASK));
+	outb(0x14, SLDM_REG(chip, DMAMODE));
+	outl(chip->dma1_start, SLDM_REG(chip, DMAADDR));
+	chip->last_capture_dmaaddr = chip->dma1_start;
+	outw(chip->dma1_size - 1, SLDM_REG(chip, DMACOUNT));
+	/* 3. Unmask DMA */
+	outb(0, SLDM_REG(chip, DMAMASK));
+}
+
+/* ----------------------------------------------------------------------
+ *
+ *                           *** PCM part ***
+ */
+
+static int snd_es1938_capture_trigger(struct snd_pcm_substream *substream,
+				      int cmd)
+{
+	struct es1938 *chip = snd_pcm_substream_chip(substream);
+	int val;
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
+		val = 0x0f;
+		chip->active |= ADC1;
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+		val = 0x00;
+		chip->active &= ~ADC1;
+		break;
+	default:
+		return -EINVAL;
+	}
+	snd_es1938_write(chip, ESS_CMD_DMACONTROL, val);
+	return 0;
+}
+
+static int snd_es1938_playback1_trigger(struct snd_pcm_substream *substream,
+					int cmd)
+{
+	struct es1938 *chip = snd_pcm_substream_chip(substream);
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
+		/* According to the documentation this should be:
+		   0x13 but that value may randomly swap stereo channels */
+                snd_es1938_mixer_write(chip, ESSSB_IREG_AUDIO2CONTROL1, 0x92);
+                udelay(10);
+		snd_es1938_mixer_write(chip, ESSSB_IREG_AUDIO2CONTROL1, 0x93);
+                /* This two stage init gives the FIFO -> DAC connection time to
+                 * settle before first data from DMA flows in.  This should ensure
+                 * no swapping of stereo channels.  Report a bug if otherwise :-) */
+		outb(0x0a, SLIO_REG(chip, AUDIO2MODE));
+		chip->active |= DAC2;
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+		outb(0, SLIO_REG(chip, AUDIO2MODE));
+		snd_es1938_mixer_write(chip, ESSSB_IREG_AUDIO2CONTROL1, 0);
+		chip->active &= ~DAC2;
+		break;
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static int snd_es1938_playback2_trigger(struct snd_pcm_substream *substream,
+					int cmd)
+{
+	struct es1938 *chip = snd_pcm_substream_chip(substream);
+	int val;
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
+		val = 5;
+		chip->active |= DAC1;
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+		val = 0;
+		chip->active &= ~DAC1;
+		break;
+	default:
+		return -EINVAL;
+	}
+	snd_es1938_write(chip, ESS_CMD_DMACONTROL, val);
+	return 0;
+}
+
+static int snd_es1938_playback_trigger(struct snd_pcm_substream *substream,
+				       int cmd)
+{
+	switch (substream->number) {
+	case 0:
+		return snd_es1938_playback1_trigger(substream, cmd);
+	case 1:
+		return snd_es1938_playback2_trigger(substream, cmd);
+	}
+	snd_BUG();
+	return -EINVAL;
+}
+
+/* --------------------------------------------------------------------
+ * First channel for Extended Mode Audio 1 ADC Operation
+ * --------------------------------------------------------------------*/
+static int snd_es1938_capture_prepare(struct snd_pcm_substream *substream)
+{
+	struct es1938 *chip = snd_pcm_substream_chip(substream);
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	int u, is8, mono;
+	unsigned int size = snd_pcm_lib_buffer_bytes(substream);
+	unsigned int count = snd_pcm_lib_period_bytes(substream);
+
+	chip->dma1_size = size;
+	chip->dma1_start = runtime->dma_addr;
+
+	mono = (runtime->channels > 1) ? 0 : 1;
+	is8 = snd_pcm_format_width(runtime->format) == 16 ? 0 : 1;
+	u = snd_pcm_format_unsigned(runtime->format);
+
+	chip->dma1_shift = 2 - mono - is8;
+
+	snd_es1938_reset_fifo(chip);
+	
+	/* program type */
+	snd_es1938_bits(chip, ESS_CMD_ANALOGCONTROL, 0x03, (mono ? 2 : 1));
+
+	/* set clock and counters */
+        snd_es1938_rate_set(chip, substream, ADC1);
+
+	count = 0x10000 - count;
+	snd_es1938_write(chip, ESS_CMD_DMACNTRELOADL, count & 0xff);
+	snd_es1938_write(chip, ESS_CMD_DMACNTRELOADH, count >> 8);
+
+	/* initialize and configure ADC */
+	snd_es1938_write(chip, ESS_CMD_SETFORMAT2, u ? 0x51 : 0x71);
+	snd_es1938_write(chip, ESS_CMD_SETFORMAT2, 0x90 | 
+		       (u ? 0x00 : 0x20) | 
+		       (is8 ? 0x00 : 0x04) | 
+		       (mono ? 0x40 : 0x08));
+
+	//	snd_es1938_reset_fifo(chip);	
+
+	/* 11. configure system interrupt controller and DMA controller */
+	snd_es1938_capture_setdma(chip);
+
+	return 0;
+}
+
+
+/* ------------------------------------------------------------------------------
+ * Second Audio channel DAC Operation
+ * ------------------------------------------------------------------------------*/
+static int snd_es1938_playback1_prepare(struct snd_pcm_substream *substream)
+{
+	struct es1938 *chip = snd_pcm_substream_chip(substream);
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	int u, is8, mono;
+	unsigned int size = snd_pcm_lib_buffer_bytes(substream);
+	unsigned int count = snd_pcm_lib_period_bytes(substream);
+
+	chip->dma2_size = size;
+	chip->dma2_start = runtime->dma_addr;
+
+	mono = (runtime->channels > 1) ? 0 : 1;
+	is8 = snd_pcm_format_width(runtime->format) == 16 ? 0 : 1;
+	u = snd_pcm_format_unsigned(runtime->format);
+
+	chip->dma2_shift = 2 - mono - is8;
+
+        snd_es1938_reset_fifo(chip);
+
+	/* set clock and counters */
+        snd_es1938_rate_set(chip, substream, DAC2);
+
+	count >>= 1;
+	count = 0x10000 - count;
+	snd_es1938_mixer_write(chip, ESSSB_IREG_AUDIO2TCOUNTL, count & 0xff);
+	snd_es1938_mixer_write(chip, ESSSB_IREG_AUDIO2TCOUNTH, count >> 8);
+
+	/* initialize and configure Audio 2 DAC */
+	snd_es1938_mixer_write(chip, ESSSB_IREG_AUDIO2CONTROL2, 0x40 | (u ? 0 : 4) |
+			       (mono ? 0 : 2) | (is8 ? 0 : 1));
+
+	/* program DMA */
+	snd_es1938_playback1_setdma(chip);
+	
+	return 0;
+}
+
+static int snd_es1938_playback2_prepare(struct snd_pcm_substream *substream)
+{
+	struct es1938 *chip = snd_pcm_substream_chip(substream);
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	int u, is8, mono;
+	unsigned int size = snd_pcm_lib_buffer_bytes(substream);
+	unsigned int count = snd_pcm_lib_period_bytes(substream);
+
+	chip->dma1_size = size;
+	chip->dma1_start = runtime->dma_addr;
+
+	mono = (runtime->channels > 1) ? 0 : 1;
+	is8 = snd_pcm_format_width(runtime->format) == 16 ? 0 : 1;
+	u = snd_pcm_format_unsigned(runtime->format);
+
+	chip->dma1_shift = 2 - mono - is8;
+
+	count = 0x10000 - count;
+ 
+	/* reset */
+	snd_es1938_reset_fifo(chip);
+	
+	snd_es1938_bits(chip, ESS_CMD_ANALOGCONTROL, 0x03, (mono ? 2 : 1));
+
+	/* set clock and counters */
+        snd_es1938_rate_set(chip, substream, DAC1);
+	snd_es1938_write(chip, ESS_CMD_DMACNTRELOADL, count & 0xff);
+	snd_es1938_write(chip, ESS_CMD_DMACNTRELOADH, count >> 8);
+
+	/* initialized and configure DAC */
+        snd_es1938_write(chip, ESS_CMD_SETFORMAT, u ? 0x80 : 0x00);
+        snd_es1938_write(chip, ESS_CMD_SETFORMAT, u ? 0x51 : 0x71);
+        snd_es1938_write(chip, ESS_CMD_SETFORMAT2, 
+			 0x90 | (mono ? 0x40 : 0x08) |
+			 (is8 ? 0x00 : 0x04) | (u ? 0x00 : 0x20));
+
+	/* program DMA */
+	snd_es1938_playback2_setdma(chip);
+	
+	return 0;
+}
+
+static int snd_es1938_playback_prepare(struct snd_pcm_substream *substream)
+{
+	switch (substream->number) {
+	case 0:
+		return snd_es1938_playback1_prepare(substream);
+	case 1:
+		return snd_es1938_playback2_prepare(substream);
+	}
+	snd_BUG();
+	return -EINVAL;
+}
+
+/* during the incrementing of dma counters the DMA register reads sometimes
+   returns garbage. To ensure a valid hw pointer, the following checks which
+   should be very unlikely to fail are used:
+   - is the current DMA address in the valid DMA range ?
+   - is the sum of DMA address and DMA counter pointing to the last DMA byte ?
+   One can argue this could differ by one byte depending on which register is
+   updated first, so the implementation below allows for that.
+*/
+static snd_pcm_uframes_t snd_es1938_capture_pointer(struct snd_pcm_substream *substream)
+{
+	struct es1938 *chip = snd_pcm_substream_chip(substream);
+	size_t ptr;
+#if 0
+	size_t old, new;
+	/* This stuff is *needed*, don't ask why - AB */
+	old = inw(SLDM_REG(chip, DMACOUNT));
+	while ((new = inw(SLDM_REG(chip, DMACOUNT))) != old)
+		old = new;
+	ptr = chip->dma1_size - 1 - new;
+#else
+	size_t count;
+	unsigned int diff;
+
+	ptr = inl(SLDM_REG(chip, DMAADDR));
+	count = inw(SLDM_REG(chip, DMACOUNT));
+	diff = chip->dma1_start + chip->dma1_size - ptr - count;
+
+	if (diff > 3 || ptr < chip->dma1_start
+	      || ptr >= chip->dma1_start+chip->dma1_size)
+	  ptr = chip->last_capture_dmaaddr;            /* bad, use last saved */
+	else
+	  chip->last_capture_dmaaddr = ptr;            /* good, remember it */
+
+	ptr -= chip->dma1_start;
+#endif
+	return ptr >> chip->dma1_shift;
+}
+
+static snd_pcm_uframes_t snd_es1938_playback1_pointer(struct snd_pcm_substream *substream)
+{
+	struct es1938 *chip = snd_pcm_substream_chip(substream);
+	size_t ptr;
+#if 1
+	ptr = chip->dma2_size - inw(SLIO_REG(chip, AUDIO2DMACOUNT));
+#else
+	ptr = inl(SLIO_REG(chip, AUDIO2DMAADDR)) - chip->dma2_start;
+#endif
+	return ptr >> chip->dma2_shift;
+}
+
+static snd_pcm_uframes_t snd_es1938_playback2_pointer(struct snd_pcm_substream *substream)
+{
+	struct es1938 *chip = snd_pcm_substream_chip(substream);
+	size_t ptr;
+	size_t old, new;
+#if 1
+	/* This stuff is *needed*, don't ask why - AB */
+	old = inw(SLDM_REG(chip, DMACOUNT));
+	while ((new = inw(SLDM_REG(chip, DMACOUNT))) != old)
+		old = new;
+	ptr = chip->dma1_size - 1 - new;
+#else
+	ptr = inl(SLDM_REG(chip, DMAADDR)) - chip->dma1_start;
+#endif
+	return ptr >> chip->dma1_shift;
+}
+
+static snd_pcm_uframes_t snd_es1938_playback_pointer(struct snd_pcm_substream *substream)
+{
+	switch (substream->number) {
+	case 0:
+		return snd_es1938_playback1_pointer(substream);
+	case 1:
+		return snd_es1938_playback2_pointer(substream);
+	}
+	snd_BUG();
+	return -EINVAL;
+}
+
+static int snd_es1938_capture_copy(struct snd_pcm_substream *substream,
+				   int channel,
+				   snd_pcm_uframes_t pos,
+				   void __user *dst,
+				   snd_pcm_uframes_t count)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct es1938 *chip = snd_pcm_substream_chip(substream);
+	pos <<= chip->dma1_shift;
+	count <<= chip->dma1_shift;
+	if (snd_BUG_ON(pos + count > chip->dma1_size))
+		return -EINVAL;
+	if (pos + count < chip->dma1_size) {
+		if (copy_to_user(dst, runtime->dma_area + pos + 1, count))
+			return -EFAULT;
+	} else {
+		if (copy_to_user(dst, runtime->dma_area + pos + 1, count - 1))
+			return -EFAULT;
+		if (put_user(runtime->dma_area[0], ((unsigned char __user *)dst) + count - 1))
+			return -EFAULT;
+	}
+	return 0;
+}
+
+/*
+ * buffer management
+ */
+static int snd_es1938_pcm_hw_params(struct snd_pcm_substream *substream,
+				    struct snd_pcm_hw_params *hw_params)
+
+{
+	int err;
+
+	if ((err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params))) < 0)
+		return err;
+	return 0;
+}
+
+static int snd_es1938_pcm_hw_free(struct snd_pcm_substream *substream)
+{
+	return snd_pcm_lib_free_pages(substream);
+}
+
+/* ----------------------------------------------------------------------
+ * Audio1 Capture (ADC)
+ * ----------------------------------------------------------------------*/
+static struct snd_pcm_hardware snd_es1938_capture =
+{
+	.info =			(SNDRV_PCM_INFO_INTERLEAVED |
+				SNDRV_PCM_INFO_BLOCK_TRANSFER),
+	.formats =		(SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE |
+				 SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U16_LE),
+	.rates =		SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
+	.rate_min =		6000,
+	.rate_max =		48000,
+	.channels_min =		1,
+	.channels_max =		2,
+        .buffer_bytes_max =	0x8000,       /* DMA controller screws on higher values */
+	.period_bytes_min =	64,
+	.period_bytes_max =	0x8000,
+	.periods_min =		1,
+	.periods_max =		1024,
+	.fifo_size =		256,
+};
+
+/* -----------------------------------------------------------------------
+ * Audio2 Playback (DAC)
+ * -----------------------------------------------------------------------*/
+static struct snd_pcm_hardware snd_es1938_playback =
+{
+	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
+				 SNDRV_PCM_INFO_BLOCK_TRANSFER |
+				 SNDRV_PCM_INFO_MMAP_VALID),
+	.formats =		(SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE |
+				 SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U16_LE),
+	.rates =		SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
+	.rate_min =		6000,
+	.rate_max =		48000,
+	.channels_min =		1,
+	.channels_max =		2,
+        .buffer_bytes_max =	0x8000,       /* DMA controller screws on higher values */
+	.period_bytes_min =	64,
+	.period_bytes_max =	0x8000,
+	.periods_min =		1,
+	.periods_max =		1024,
+	.fifo_size =		256,
+};
+
+static int snd_es1938_capture_open(struct snd_pcm_substream *substream)
+{
+	struct es1938 *chip = snd_pcm_substream_chip(substream);
+	struct snd_pcm_runtime *runtime = substream->runtime;
+
+	if (chip->playback2_substream)
+		return -EAGAIN;
+	chip->capture_substream = substream;
+	runtime->hw = snd_es1938_capture;
+	snd_pcm_hw_constraint_ratnums(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
+				      &hw_constraints_clocks);
+	snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, 0xff00);
+	return 0;
+}
+
+static int snd_es1938_playback_open(struct snd_pcm_substream *substream)
+{
+	struct es1938 *chip = snd_pcm_substream_chip(substream);
+	struct snd_pcm_runtime *runtime = substream->runtime;
+
+	switch (substream->number) {
+	case 0:
+		chip->playback1_substream = substream;
+		break;
+	case 1:
+		if (chip->capture_substream)
+			return -EAGAIN;
+		chip->playback2_substream = substream;
+		break;
+	default:
+		snd_BUG();
+		return -EINVAL;
+	}
+	runtime->hw = snd_es1938_playback;
+	snd_pcm_hw_constraint_ratnums(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
+				      &hw_constraints_clocks);
+	snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, 0xff00);
+	return 0;
+}
+
+static int snd_es1938_capture_close(struct snd_pcm_substream *substream)
+{
+	struct es1938 *chip = snd_pcm_substream_chip(substream);
+
+	chip->capture_substream = NULL;
+	return 0;
+}
+
+static int snd_es1938_playback_close(struct snd_pcm_substream *substream)
+{
+	struct es1938 *chip = snd_pcm_substream_chip(substream);
+
+	switch (substream->number) {
+	case 0:
+		chip->playback1_substream = NULL;
+		break;
+	case 1:
+		chip->playback2_substream = NULL;
+		break;
+	default:
+		snd_BUG();
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static struct snd_pcm_ops snd_es1938_playback_ops = {
+	.open =		snd_es1938_playback_open,
+	.close =	snd_es1938_playback_close,
+	.ioctl =	snd_pcm_lib_ioctl,
+	.hw_params =	snd_es1938_pcm_hw_params,
+	.hw_free =	snd_es1938_pcm_hw_free,
+	.prepare =	snd_es1938_playback_prepare,
+	.trigger =	snd_es1938_playback_trigger,
+	.pointer =	snd_es1938_playback_pointer,
+};
+
+static struct snd_pcm_ops snd_es1938_capture_ops = {
+	.open =		snd_es1938_capture_open,
+	.close =	snd_es1938_capture_close,
+	.ioctl =	snd_pcm_lib_ioctl,
+	.hw_params =	snd_es1938_pcm_hw_params,
+	.hw_free =	snd_es1938_pcm_hw_free,
+	.prepare =	snd_es1938_capture_prepare,
+	.trigger =	snd_es1938_capture_trigger,
+	.pointer =	snd_es1938_capture_pointer,
+	.copy =		snd_es1938_capture_copy,
+};
+
+static int snd_es1938_new_pcm(struct es1938 *chip, int device)
+{
+	struct snd_pcm *pcm;
+	int err;
+
+	if ((err = snd_pcm_new(chip->card, "es-1938-1946", device, 2, 1, &pcm)) < 0)
+		return err;
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_es1938_playback_ops);
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_es1938_capture_ops);
+	
+	pcm->private_data = chip;
+	pcm->info_flags = 0;
+	strcpy(pcm->name, "ESS Solo-1");
+
+	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;
+}
+
+/* -------------------------------------------------------------------
+ * 
+ *                       *** Mixer part ***
+ */
+
+static int snd_es1938_info_mux(struct snd_kcontrol *kcontrol,
+			       struct snd_ctl_elem_info *uinfo)
+{
+	static const char * const texts[8] = {
+		"Mic", "Mic Master", "CD", "AOUT",
+		"Mic1", "Mix", "Line", "Master"
+	};
+
+	return snd_ctl_enum_info(uinfo, 1, 8, texts);
+}
+
+static int snd_es1938_get_mux(struct snd_kcontrol *kcontrol,
+			      struct snd_ctl_elem_value *ucontrol)
+{
+	struct es1938 *chip = snd_kcontrol_chip(kcontrol);
+	ucontrol->value.enumerated.item[0] = snd_es1938_mixer_read(chip, 0x1c) & 0x07;
+	return 0;
+}
+
+static int snd_es1938_put_mux(struct snd_kcontrol *kcontrol,
+			      struct snd_ctl_elem_value *ucontrol)
+{
+	struct es1938 *chip = snd_kcontrol_chip(kcontrol);
+	unsigned char val = ucontrol->value.enumerated.item[0];
+	
+	if (val > 7)
+		return -EINVAL;
+	return snd_es1938_mixer_bits(chip, 0x1c, 0x07, val) != val;
+}
+
+#define snd_es1938_info_spatializer_enable	snd_ctl_boolean_mono_info
+
+static int snd_es1938_get_spatializer_enable(struct snd_kcontrol *kcontrol,
+					     struct snd_ctl_elem_value *ucontrol)
+{
+	struct es1938 *chip = snd_kcontrol_chip(kcontrol);
+	unsigned char val = snd_es1938_mixer_read(chip, 0x50);
+	ucontrol->value.integer.value[0] = !!(val & 8);
+	return 0;
+}
+
+static int snd_es1938_put_spatializer_enable(struct snd_kcontrol *kcontrol,
+					     struct snd_ctl_elem_value *ucontrol)
+{
+	struct es1938 *chip = snd_kcontrol_chip(kcontrol);
+	unsigned char oval, nval;
+	int change;
+	nval = ucontrol->value.integer.value[0] ? 0x0c : 0x04;
+	oval = snd_es1938_mixer_read(chip, 0x50) & 0x0c;
+	change = nval != oval;
+	if (change) {
+		snd_es1938_mixer_write(chip, 0x50, nval & ~0x04);
+		snd_es1938_mixer_write(chip, 0x50, nval);
+	}
+	return change;
+}
+
+static int snd_es1938_info_hw_volume(struct snd_kcontrol *kcontrol,
+				     struct snd_ctl_elem_info *uinfo)
+{
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+	uinfo->count = 2;
+	uinfo->value.integer.min = 0;
+	uinfo->value.integer.max = 63;
+	return 0;
+}
+
+static int snd_es1938_get_hw_volume(struct snd_kcontrol *kcontrol,
+				    struct snd_ctl_elem_value *ucontrol)
+{
+	struct es1938 *chip = snd_kcontrol_chip(kcontrol);
+	ucontrol->value.integer.value[0] = snd_es1938_mixer_read(chip, 0x61) & 0x3f;
+	ucontrol->value.integer.value[1] = snd_es1938_mixer_read(chip, 0x63) & 0x3f;
+	return 0;
+}
+
+#define snd_es1938_info_hw_switch		snd_ctl_boolean_stereo_info
+
+static int snd_es1938_get_hw_switch(struct snd_kcontrol *kcontrol,
+				    struct snd_ctl_elem_value *ucontrol)
+{
+	struct es1938 *chip = snd_kcontrol_chip(kcontrol);
+	ucontrol->value.integer.value[0] = !(snd_es1938_mixer_read(chip, 0x61) & 0x40);
+	ucontrol->value.integer.value[1] = !(snd_es1938_mixer_read(chip, 0x63) & 0x40);
+	return 0;
+}
+
+static void snd_es1938_hwv_free(struct snd_kcontrol *kcontrol)
+{
+	struct es1938 *chip = snd_kcontrol_chip(kcontrol);
+	chip->master_volume = NULL;
+	chip->master_switch = NULL;
+	chip->hw_volume = NULL;
+	chip->hw_switch = NULL;
+}
+
+static int snd_es1938_reg_bits(struct es1938 *chip, unsigned char reg,
+			       unsigned char mask, unsigned char val)
+{
+	if (reg < 0xa0)
+		return snd_es1938_mixer_bits(chip, reg, mask, val);
+	else
+		return snd_es1938_bits(chip, reg, mask, val);
+}
+
+static int snd_es1938_reg_read(struct es1938 *chip, unsigned char reg)
+{
+	if (reg < 0xa0)
+		return snd_es1938_mixer_read(chip, reg);
+	else
+		return snd_es1938_read(chip, reg);
+}
+
+#define ES1938_SINGLE_TLV(xname, xindex, reg, shift, mask, invert, xtlv)    \
+{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
+  .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ,\
+  .name = xname, .index = xindex, \
+  .info = snd_es1938_info_single, \
+  .get = snd_es1938_get_single, .put = snd_es1938_put_single, \
+  .private_value = reg | (shift << 8) | (mask << 16) | (invert << 24), \
+  .tlv = { .p = xtlv } }
+#define ES1938_SINGLE(xname, xindex, reg, shift, mask, invert) \
+{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
+  .info = snd_es1938_info_single, \
+  .get = snd_es1938_get_single, .put = snd_es1938_put_single, \
+  .private_value = reg | (shift << 8) | (mask << 16) | (invert << 24) }
+
+static int snd_es1938_info_single(struct snd_kcontrol *kcontrol,
+				  struct snd_ctl_elem_info *uinfo)
+{
+	int mask = (kcontrol->private_value >> 16) & 0xff;
+
+	uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
+	uinfo->count = 1;
+	uinfo->value.integer.min = 0;
+	uinfo->value.integer.max = mask;
+	return 0;
+}
+
+static int snd_es1938_get_single(struct snd_kcontrol *kcontrol,
+				 struct snd_ctl_elem_value *ucontrol)
+{
+	struct es1938 *chip = snd_kcontrol_chip(kcontrol);
+	int reg = kcontrol->private_value & 0xff;
+	int shift = (kcontrol->private_value >> 8) & 0xff;
+	int mask = (kcontrol->private_value >> 16) & 0xff;
+	int invert = (kcontrol->private_value >> 24) & 0xff;
+	int val;
+	
+	val = snd_es1938_reg_read(chip, reg);
+	ucontrol->value.integer.value[0] = (val >> shift) & mask;
+	if (invert)
+		ucontrol->value.integer.value[0] = mask - ucontrol->value.integer.value[0];
+	return 0;
+}
+
+static int snd_es1938_put_single(struct snd_kcontrol *kcontrol,
+				 struct snd_ctl_elem_value *ucontrol)
+{
+	struct es1938 *chip = snd_kcontrol_chip(kcontrol);
+	int reg = kcontrol->private_value & 0xff;
+	int shift = (kcontrol->private_value >> 8) & 0xff;
+	int mask = (kcontrol->private_value >> 16) & 0xff;
+	int invert = (kcontrol->private_value >> 24) & 0xff;
+	unsigned char val;
+	
+	val = (ucontrol->value.integer.value[0] & mask);
+	if (invert)
+		val = mask - val;
+	mask <<= shift;
+	val <<= shift;
+	return snd_es1938_reg_bits(chip, reg, mask, val) != val;
+}
+
+#define ES1938_DOUBLE_TLV(xname, xindex, left_reg, right_reg, shift_left, shift_right, mask, invert, xtlv) \
+{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
+  .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ,\
+  .name = xname, .index = xindex, \
+  .info = snd_es1938_info_double, \
+  .get = snd_es1938_get_double, .put = snd_es1938_put_double, \
+  .private_value = left_reg | (right_reg << 8) | (shift_left << 16) | (shift_right << 19) | (mask << 24) | (invert << 22), \
+  .tlv = { .p = xtlv } }
+#define ES1938_DOUBLE(xname, xindex, left_reg, right_reg, shift_left, shift_right, mask, invert) \
+{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
+  .info = snd_es1938_info_double, \
+  .get = snd_es1938_get_double, .put = snd_es1938_put_double, \
+  .private_value = left_reg | (right_reg << 8) | (shift_left << 16) | (shift_right << 19) | (mask << 24) | (invert << 22) }
+
+static int snd_es1938_info_double(struct snd_kcontrol *kcontrol,
+				  struct snd_ctl_elem_info *uinfo)
+{
+	int mask = (kcontrol->private_value >> 24) & 0xff;
+
+	uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
+	uinfo->count = 2;
+	uinfo->value.integer.min = 0;
+	uinfo->value.integer.max = mask;
+	return 0;
+}
+
+static int snd_es1938_get_double(struct snd_kcontrol *kcontrol,
+				 struct snd_ctl_elem_value *ucontrol)
+{
+	struct es1938 *chip = snd_kcontrol_chip(kcontrol);
+	int left_reg = kcontrol->private_value & 0xff;
+	int right_reg = (kcontrol->private_value >> 8) & 0xff;
+	int shift_left = (kcontrol->private_value >> 16) & 0x07;
+	int shift_right = (kcontrol->private_value >> 19) & 0x07;
+	int mask = (kcontrol->private_value >> 24) & 0xff;
+	int invert = (kcontrol->private_value >> 22) & 1;
+	unsigned char left, right;
+	
+	left = snd_es1938_reg_read(chip, left_reg);
+	if (left_reg != right_reg)
+		right = snd_es1938_reg_read(chip, right_reg);
+	else
+		right = left;
+	ucontrol->value.integer.value[0] = (left >> shift_left) & mask;
+	ucontrol->value.integer.value[1] = (right >> shift_right) & mask;
+	if (invert) {
+		ucontrol->value.integer.value[0] = mask - ucontrol->value.integer.value[0];
+		ucontrol->value.integer.value[1] = mask - ucontrol->value.integer.value[1];
+	}
+	return 0;
+}
+
+static int snd_es1938_put_double(struct snd_kcontrol *kcontrol,
+				 struct snd_ctl_elem_value *ucontrol)
+{
+	struct es1938 *chip = snd_kcontrol_chip(kcontrol);
+	int left_reg = kcontrol->private_value & 0xff;
+	int right_reg = (kcontrol->private_value >> 8) & 0xff;
+	int shift_left = (kcontrol->private_value >> 16) & 0x07;
+	int shift_right = (kcontrol->private_value >> 19) & 0x07;
+	int mask = (kcontrol->private_value >> 24) & 0xff;
+	int invert = (kcontrol->private_value >> 22) & 1;
+	int change;
+	unsigned char val1, val2, mask1, mask2;
+	
+	val1 = ucontrol->value.integer.value[0] & mask;
+	val2 = ucontrol->value.integer.value[1] & mask;
+	if (invert) {
+		val1 = mask - val1;
+		val2 = mask - val2;
+	}
+	val1 <<= shift_left;
+	val2 <<= shift_right;
+	mask1 = mask << shift_left;
+	mask2 = mask << shift_right;
+	if (left_reg != right_reg) {
+		change = 0;
+		if (snd_es1938_reg_bits(chip, left_reg, mask1, val1) != val1)
+			change = 1;
+		if (snd_es1938_reg_bits(chip, right_reg, mask2, val2) != val2)
+			change = 1;
+	} else {
+		change = (snd_es1938_reg_bits(chip, left_reg, mask1 | mask2, 
+					      val1 | val2) != (val1 | val2));
+	}
+	return change;
+}
+
+static const DECLARE_TLV_DB_RANGE(db_scale_master,
+	0, 54, TLV_DB_SCALE_ITEM(-3600, 50, 1),
+	54, 63, TLV_DB_SCALE_ITEM(-900, 100, 0),
+);
+
+static const DECLARE_TLV_DB_RANGE(db_scale_audio1,
+	0, 8, TLV_DB_SCALE_ITEM(-3300, 300, 1),
+	8, 15, TLV_DB_SCALE_ITEM(-900, 150, 0),
+);
+
+static const DECLARE_TLV_DB_RANGE(db_scale_audio2,
+	0, 8, TLV_DB_SCALE_ITEM(-3450, 300, 1),
+	8, 15, TLV_DB_SCALE_ITEM(-1050, 150, 0),
+);
+
+static const DECLARE_TLV_DB_RANGE(db_scale_mic,
+	0, 8, TLV_DB_SCALE_ITEM(-2400, 300, 1),
+	8, 15, TLV_DB_SCALE_ITEM(0, 150, 0),
+);
+
+static const DECLARE_TLV_DB_RANGE(db_scale_line,
+	0, 8, TLV_DB_SCALE_ITEM(-3150, 300, 1),
+	8, 15, TLV_DB_SCALE_ITEM(-750, 150, 0),
+);
+
+static const DECLARE_TLV_DB_SCALE(db_scale_capture, 0, 150, 0);
+
+static struct snd_kcontrol_new snd_es1938_controls[] = {
+ES1938_DOUBLE_TLV("Master Playback Volume", 0, 0x60, 0x62, 0, 0, 63, 0,
+		  db_scale_master),
+ES1938_DOUBLE("Master Playback Switch", 0, 0x60, 0x62, 6, 6, 1, 1),
+{
+	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+	.name = "Hardware Master Playback Volume",
+	.access = SNDRV_CTL_ELEM_ACCESS_READ,
+	.info = snd_es1938_info_hw_volume,
+	.get = snd_es1938_get_hw_volume,
+},
+{
+	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+	.access = (SNDRV_CTL_ELEM_ACCESS_READ |
+		   SNDRV_CTL_ELEM_ACCESS_TLV_READ),
+	.name = "Hardware Master Playback Switch",
+	.info = snd_es1938_info_hw_switch,
+	.get = snd_es1938_get_hw_switch,
+	.tlv = { .p = db_scale_master },
+},
+ES1938_SINGLE("Hardware Volume Split", 0, 0x64, 7, 1, 0),
+ES1938_DOUBLE_TLV("Line Playback Volume", 0, 0x3e, 0x3e, 4, 0, 15, 0,
+		  db_scale_line),
+ES1938_DOUBLE("CD Playback Volume", 0, 0x38, 0x38, 4, 0, 15, 0),
+ES1938_DOUBLE_TLV("FM Playback Volume", 0, 0x36, 0x36, 4, 0, 15, 0,
+		  db_scale_mic),
+ES1938_DOUBLE_TLV("Mono Playback Volume", 0, 0x6d, 0x6d, 4, 0, 15, 0,
+		  db_scale_line),
+ES1938_DOUBLE_TLV("Mic Playback Volume", 0, 0x1a, 0x1a, 4, 0, 15, 0,
+		  db_scale_mic),
+ES1938_DOUBLE_TLV("Aux Playback Volume", 0, 0x3a, 0x3a, 4, 0, 15, 0,
+		  db_scale_line),
+ES1938_DOUBLE_TLV("Capture Volume", 0, 0xb4, 0xb4, 4, 0, 15, 0,
+		  db_scale_capture),
+ES1938_SINGLE("Beep Volume", 0, 0x3c, 0, 7, 0),
+ES1938_SINGLE("Record Monitor", 0, 0xa8, 3, 1, 0),
+ES1938_SINGLE("Capture Switch", 0, 0x1c, 4, 1, 1),
+{
+	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+	.name = "Capture Source",
+	.info = snd_es1938_info_mux,
+	.get = snd_es1938_get_mux,
+	.put = snd_es1938_put_mux,
+},
+ES1938_DOUBLE_TLV("Mono Input Playback Volume", 0, 0x6d, 0x6d, 4, 0, 15, 0,
+		  db_scale_line),
+ES1938_DOUBLE_TLV("PCM Capture Volume", 0, 0x69, 0x69, 4, 0, 15, 0,
+		  db_scale_audio2),
+ES1938_DOUBLE_TLV("Mic Capture Volume", 0, 0x68, 0x68, 4, 0, 15, 0,
+		  db_scale_mic),
+ES1938_DOUBLE_TLV("Line Capture Volume", 0, 0x6e, 0x6e, 4, 0, 15, 0,
+		  db_scale_line),
+ES1938_DOUBLE_TLV("FM Capture Volume", 0, 0x6b, 0x6b, 4, 0, 15, 0,
+		  db_scale_mic),
+ES1938_DOUBLE_TLV("Mono Capture Volume", 0, 0x6f, 0x6f, 4, 0, 15, 0,
+		  db_scale_line),
+ES1938_DOUBLE_TLV("CD Capture Volume", 0, 0x6a, 0x6a, 4, 0, 15, 0,
+		  db_scale_line),
+ES1938_DOUBLE_TLV("Aux Capture Volume", 0, 0x6c, 0x6c, 4, 0, 15, 0,
+		  db_scale_line),
+ES1938_DOUBLE_TLV("PCM Playback Volume", 0, 0x7c, 0x7c, 4, 0, 15, 0,
+		  db_scale_audio2),
+ES1938_DOUBLE_TLV("PCM Playback Volume", 1, 0x14, 0x14, 4, 0, 15, 0,
+		  db_scale_audio1),
+ES1938_SINGLE("3D Control - Level", 0, 0x52, 0, 63, 0),
+{
+	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+	.name = "3D Control - Switch",
+	.info = snd_es1938_info_spatializer_enable,
+	.get = snd_es1938_get_spatializer_enable,
+	.put = snd_es1938_put_spatializer_enable,
+},
+ES1938_SINGLE("Mic Boost (+26dB)", 0, 0x7d, 3, 1, 0)
+};
+
+
+/* ---------------------------------------------------------------------------- */
+/* ---------------------------------------------------------------------------- */
+
+/*
+ * initialize the chip - used by resume callback, too
+ */
+static void snd_es1938_chip_init(struct es1938 *chip)
+{
+	/* reset chip */
+	snd_es1938_reset(chip);
+
+	/* configure native mode */
+
+	/* enable bus master */
+	pci_set_master(chip->pci);
+
+	/* disable legacy audio */
+	pci_write_config_word(chip->pci, SL_PCI_LEGACYCONTROL, 0x805f);
+
+	/* set DDMA base */
+	pci_write_config_word(chip->pci, SL_PCI_DDMACONTROL, chip->ddma_port | 1);
+
+	/* set DMA/IRQ policy */
+	pci_write_config_dword(chip->pci, SL_PCI_CONFIG, 0);
+
+	/* enable Audio 1, Audio 2, MPU401 IRQ and HW volume IRQ*/
+	outb(0xf0, SLIO_REG(chip, IRQCONTROL));
+
+	/* reset DMA */
+	outb(0, SLDM_REG(chip, DMACLEAR));
+}
+
+#ifdef CONFIG_PM_SLEEP
+/*
+ * PM support
+ */
+
+static unsigned char saved_regs[SAVED_REG_SIZE+1] = {
+	0x14, 0x1a, 0x1c, 0x3a, 0x3c, 0x3e, 0x36, 0x38,
+	0x50, 0x52, 0x60, 0x61, 0x62, 0x63, 0x64, 0x68,
+	0x69, 0x6a, 0x6b, 0x6d, 0x6e, 0x6f, 0x7c, 0x7d,
+	0xa8, 0xb4,
+};
+
+
+static int es1938_suspend(struct device *dev)
+{
+	struct snd_card *card = dev_get_drvdata(dev);
+	struct es1938 *chip = card->private_data;
+	unsigned char *s, *d;
+
+	snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
+	snd_pcm_suspend_all(chip->pcm);
+
+	/* save mixer-related registers */
+	for (s = saved_regs, d = chip->saved_regs; *s; s++, d++)
+		*d = snd_es1938_reg_read(chip, *s);
+
+	outb(0x00, SLIO_REG(chip, IRQCONTROL)); /* disable irqs */
+	if (chip->irq >= 0) {
+		free_irq(chip->irq, chip);
+		chip->irq = -1;
+	}
+	return 0;
+}
+
+static int es1938_resume(struct device *dev)
+{
+	struct pci_dev *pci = to_pci_dev(dev);
+	struct snd_card *card = dev_get_drvdata(dev);
+	struct es1938 *chip = card->private_data;
+	unsigned char *s, *d;
+
+	if (request_irq(pci->irq, snd_es1938_interrupt,
+			IRQF_SHARED, KBUILD_MODNAME, chip)) {
+		dev_err(dev, "unable to grab IRQ %d, disabling device\n",
+			pci->irq);
+		snd_card_disconnect(card);
+		return -EIO;
+	}
+	chip->irq = pci->irq;
+	snd_es1938_chip_init(chip);
+
+	/* restore mixer-related registers */
+	for (s = saved_regs, d = chip->saved_regs; *s; s++, d++) {
+		if (*s < 0xa0)
+			snd_es1938_mixer_write(chip, *s, *d);
+		else
+			snd_es1938_write(chip, *s, *d);
+	}
+
+	snd_power_change_state(card, SNDRV_CTL_POWER_D0);
+	return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(es1938_pm, es1938_suspend, es1938_resume);
+#define ES1938_PM_OPS	&es1938_pm
+#else
+#define ES1938_PM_OPS	NULL
+#endif /* CONFIG_PM_SLEEP */
+
+#ifdef SUPPORT_JOYSTICK
+static int snd_es1938_create_gameport(struct es1938 *chip)
+{
+	struct gameport *gp;
+
+	chip->gameport = gp = gameport_allocate_port();
+	if (!gp) {
+		dev_err(chip->card->dev,
+			"cannot allocate memory for gameport\n");
+		return -ENOMEM;
+	}
+
+	gameport_set_name(gp, "ES1938");
+	gameport_set_phys(gp, "pci%s/gameport0", pci_name(chip->pci));
+	gameport_set_dev_parent(gp, &chip->pci->dev);
+	gp->io = chip->game_port;
+
+	gameport_register_port(gp);
+
+	return 0;
+}
+
+static void snd_es1938_free_gameport(struct es1938 *chip)
+{
+	if (chip->gameport) {
+		gameport_unregister_port(chip->gameport);
+		chip->gameport = NULL;
+	}
+}
+#else
+static inline int snd_es1938_create_gameport(struct es1938 *chip) { return -ENOSYS; }
+static inline void snd_es1938_free_gameport(struct es1938 *chip) { }
+#endif /* SUPPORT_JOYSTICK */
+
+static int snd_es1938_free(struct es1938 *chip)
+{
+	/* disable irqs */
+	outb(0x00, SLIO_REG(chip, IRQCONTROL));
+	if (chip->rmidi)
+		snd_es1938_mixer_bits(chip, ESSSB_IREG_MPU401CONTROL, 0x40, 0);
+
+	snd_es1938_free_gameport(chip);
+
+	if (chip->irq >= 0)
+		free_irq(chip->irq, chip);
+	pci_release_regions(chip->pci);
+	pci_disable_device(chip->pci);
+	kfree(chip);
+	return 0;
+}
+
+static int snd_es1938_dev_free(struct snd_device *device)
+{
+	struct es1938 *chip = device->device_data;
+	return snd_es1938_free(chip);
+}
+
+static int snd_es1938_create(struct snd_card *card,
+			     struct pci_dev *pci,
+			     struct es1938 **rchip)
+{
+	struct es1938 *chip;
+	int err;
+	static struct snd_device_ops ops = {
+		.dev_free =	snd_es1938_dev_free,
+	};
+
+	*rchip = NULL;
+
+	/* 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, DMA_BIT_MASK(24)) < 0 ||
+	    pci_set_consistent_dma_mask(pci, DMA_BIT_MASK(24)) < 0) {
+		dev_err(card->dev,
+			"architecture does not support 24bit PCI busmaster DMA\n");
+		pci_disable_device(pci);
+                return -ENXIO;
+        }
+
+	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
+	if (chip == NULL) {
+		pci_disable_device(pci);
+		return -ENOMEM;
+	}
+	spin_lock_init(&chip->reg_lock);
+	spin_lock_init(&chip->mixer_lock);
+	chip->card = card;
+	chip->pci = pci;
+	chip->irq = -1;
+	if ((err = pci_request_regions(pci, "ESS Solo-1")) < 0) {
+		kfree(chip);
+		pci_disable_device(pci);
+		return err;
+	}
+	chip->io_port = pci_resource_start(pci, 0);
+	chip->sb_port = pci_resource_start(pci, 1);
+	chip->vc_port = pci_resource_start(pci, 2);
+	chip->mpu_port = pci_resource_start(pci, 3);
+	chip->game_port = pci_resource_start(pci, 4);
+	if (request_irq(pci->irq, snd_es1938_interrupt, IRQF_SHARED,
+			KBUILD_MODNAME, chip)) {
+		dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);
+		snd_es1938_free(chip);
+		return -EBUSY;
+	}
+	chip->irq = pci->irq;
+	dev_dbg(card->dev,
+		"create: io: 0x%lx, sb: 0x%lx, vc: 0x%lx, mpu: 0x%lx, game: 0x%lx\n",
+		   chip->io_port, chip->sb_port, chip->vc_port, chip->mpu_port, chip->game_port);
+
+	chip->ddma_port = chip->vc_port + 0x00;		/* fix from Thomas Sailer */
+
+	snd_es1938_chip_init(chip);
+
+	if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
+		snd_es1938_free(chip);
+		return err;
+	}
+
+	*rchip = chip;
+	return 0;
+}
+
+/* --------------------------------------------------------------------
+ * Interrupt handler
+ * -------------------------------------------------------------------- */
+static irqreturn_t snd_es1938_interrupt(int irq, void *dev_id)
+{
+	struct es1938 *chip = dev_id;
+	unsigned char status, audiostatus;
+	int handled = 0;
+
+	status = inb(SLIO_REG(chip, IRQCONTROL));
+#if 0
+	dev_dbg(chip->card->dev,
+		"Es1938debug - interrupt status: =0x%x\n", status);
+#endif
+	
+	/* AUDIO 1 */
+	if (status & 0x10) {
+#if 0
+		dev_dbg(chip->card->dev,
+		       "Es1938debug - AUDIO channel 1 interrupt\n");
+		dev_dbg(chip->card->dev,
+		       "Es1938debug - AUDIO channel 1 DMAC DMA count: %u\n",
+		       inw(SLDM_REG(chip, DMACOUNT)));
+		dev_dbg(chip->card->dev,
+		       "Es1938debug - AUDIO channel 1 DMAC DMA base: %u\n",
+		       inl(SLDM_REG(chip, DMAADDR)));
+		dev_dbg(chip->card->dev,
+		       "Es1938debug - AUDIO channel 1 DMAC DMA status: 0x%x\n",
+		       inl(SLDM_REG(chip, DMASTATUS)));
+#endif
+		/* clear irq */
+		handled = 1;
+		audiostatus = inb(SLSB_REG(chip, STATUS));
+		if (chip->active & ADC1)
+			snd_pcm_period_elapsed(chip->capture_substream);
+		else if (chip->active & DAC1)
+			snd_pcm_period_elapsed(chip->playback2_substream);
+	}
+	
+	/* AUDIO 2 */
+	if (status & 0x20) {
+#if 0
+		dev_dbg(chip->card->dev,
+		       "Es1938debug - AUDIO channel 2 interrupt\n");
+		dev_dbg(chip->card->dev,
+		       "Es1938debug - AUDIO channel 2 DMAC DMA count: %u\n",
+		       inw(SLIO_REG(chip, AUDIO2DMACOUNT)));
+		dev_dbg(chip->card->dev,
+		       "Es1938debug - AUDIO channel 2 DMAC DMA base: %u\n",
+		       inl(SLIO_REG(chip, AUDIO2DMAADDR)));
+
+#endif
+		/* clear irq */
+		handled = 1;
+		snd_es1938_mixer_bits(chip, ESSSB_IREG_AUDIO2CONTROL2, 0x80, 0);
+		if (chip->active & DAC2)
+			snd_pcm_period_elapsed(chip->playback1_substream);
+	}
+
+	/* Hardware volume */
+	if (status & 0x40) {
+		int split = snd_es1938_mixer_read(chip, 0x64) & 0x80;
+		handled = 1;
+		snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE, &chip->hw_switch->id);
+		snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE, &chip->hw_volume->id);
+		if (!split) {
+			snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
+				       &chip->master_switch->id);
+			snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
+				       &chip->master_volume->id);
+		}
+		/* ack interrupt */
+		snd_es1938_mixer_write(chip, 0x66, 0x00);
+	}
+
+	/* MPU401 */
+	if (status & 0x80) {
+		// the following line is evil! It switches off MIDI interrupt handling after the first interrupt received.
+		// replacing the last 0 by 0x40 works for ESS-Solo1, but just doing nothing works as well!
+		// andreas@flying-snail.de
+		// snd_es1938_mixer_bits(chip, ESSSB_IREG_MPU401CONTROL, 0x40, 0); /* ack? */
+		if (chip->rmidi) {
+			handled = 1;
+			snd_mpu401_uart_interrupt(irq, chip->rmidi->private_data);
+		}
+	}
+	return IRQ_RETVAL(handled);
+}
+
+#define ES1938_DMA_SIZE 64
+
+static int snd_es1938_mixer(struct es1938 *chip)
+{
+	struct snd_card *card;
+	unsigned int idx;
+	int err;
+
+	card = chip->card;
+
+	strcpy(card->mixername, "ESS Solo-1");
+
+	for (idx = 0; idx < ARRAY_SIZE(snd_es1938_controls); idx++) {
+		struct snd_kcontrol *kctl;
+		kctl = snd_ctl_new1(&snd_es1938_controls[idx], chip);
+		switch (idx) {
+			case 0:
+				chip->master_volume = kctl;
+				kctl->private_free = snd_es1938_hwv_free;
+				break;
+			case 1:
+				chip->master_switch = kctl;
+				kctl->private_free = snd_es1938_hwv_free;
+				break;
+			case 2:
+				chip->hw_volume = kctl;
+				kctl->private_free = snd_es1938_hwv_free;
+				break;
+			case 3:
+				chip->hw_switch = kctl;
+				kctl->private_free = snd_es1938_hwv_free;
+				break;
+			}
+		if ((err = snd_ctl_add(card, kctl)) < 0)
+			return err;
+	}
+	return 0;
+}
+       
+
+static int snd_es1938_probe(struct pci_dev *pci,
+			    const struct pci_device_id *pci_id)
+{
+	static int dev;
+	struct snd_card *card;
+	struct es1938 *chip;
+	struct snd_opl3 *opl3;
+	int idx, err;
+
+	if (dev >= SNDRV_CARDS)
+		return -ENODEV;
+	if (!enable[dev]) {
+		dev++;
+		return -ENOENT;
+	}
+
+	err = snd_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
+			   0, &card);
+	if (err < 0)
+		return err;
+	for (idx = 0; idx < 5; idx++) {
+		if (pci_resource_start(pci, idx) == 0 ||
+		    !(pci_resource_flags(pci, idx) & IORESOURCE_IO)) {
+		    	snd_card_free(card);
+		    	return -ENODEV;
+		}
+	}
+	if ((err = snd_es1938_create(card, pci, &chip)) < 0) {
+		snd_card_free(card);
+		return err;
+	}
+	card->private_data = chip;
+
+	strcpy(card->driver, "ES1938");
+	strcpy(card->shortname, "ESS ES1938 (Solo-1)");
+	sprintf(card->longname, "%s rev %i, irq %i",
+		card->shortname,
+		chip->revision,
+		chip->irq);
+
+	if ((err = snd_es1938_new_pcm(chip, 0)) < 0) {
+		snd_card_free(card);
+		return err;
+	}
+	if ((err = snd_es1938_mixer(chip)) < 0) {
+		snd_card_free(card);
+		return err;
+	}
+	if (snd_opl3_create(card,
+			    SLSB_REG(chip, FMLOWADDR),
+			    SLSB_REG(chip, FMHIGHADDR),
+			    OPL3_HW_OPL3, 1, &opl3) < 0) {
+		dev_err(card->dev, "OPL3 not detected at 0x%lx\n",
+			   SLSB_REG(chip, FMLOWADDR));
+	} else {
+	        if ((err = snd_opl3_timer_new(opl3, 0, 1)) < 0) {
+	                snd_card_free(card);
+	                return err;
+		}
+	        if ((err = snd_opl3_hwdep_new(opl3, 0, 1, NULL)) < 0) {
+	                snd_card_free(card);
+	                return err;
+		}
+	}
+	if (snd_mpu401_uart_new(card, 0, MPU401_HW_MPU401,
+				chip->mpu_port,
+				MPU401_INFO_INTEGRATED | MPU401_INFO_IRQ_HOOK,
+				-1, &chip->rmidi) < 0) {
+		dev_err(card->dev, "unable to initialize MPU-401\n");
+	} else {
+		// this line is vital for MIDI interrupt handling on ess-solo1
+		// andreas@flying-snail.de
+		snd_es1938_mixer_bits(chip, ESSSB_IREG_MPU401CONTROL, 0x40, 0x40);
+	}
+
+	snd_es1938_create_gameport(chip);
+
+	if ((err = snd_card_register(card)) < 0) {
+		snd_card_free(card);
+		return err;
+	}
+
+	pci_set_drvdata(pci, card);
+	dev++;
+	return 0;
+}
+
+static void snd_es1938_remove(struct pci_dev *pci)
+{
+	snd_card_free(pci_get_drvdata(pci));
+}
+
+static struct pci_driver es1938_driver = {
+	.name = KBUILD_MODNAME,
+	.id_table = snd_es1938_ids,
+	.probe = snd_es1938_probe,
+	.remove = snd_es1938_remove,
+	.driver = {
+		.pm = ES1938_PM_OPS,
+	},
+};
+
+module_pci_driver(es1938_driver);