/*
 * Driver for ESS Maestro3/Allegro (ES1988) soundcards.
 * Copyright (c) 2000 by Zach Brown <zab@zabbo.net>
 *                       Takashi Iwai <tiwai@suse.de>
 *
 * Most of the hardware init stuffs are based on maestro3 driver for
 * OSS/Free by Zach Brown.  Many thanks to Zach!
 *
 *   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
 *
 *
 * ChangeLog:
 * Aug. 27, 2001
 *     - Fixed deadlock on capture
 *     - Added Canyon3D-2 support by Rob Riggs <rob@pangalactic.org>
 *
 */
 
#define CARD_NAME "ESS Maestro3/Allegro/Canyon3D-2"
#define DRIVER_NAME "Maestro3"

#include <sound/driver.h>
#include <asm/io.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/moduleparam.h>
#include <sound/core.h>
#include <sound/info.h>
#include <sound/control.h>
#include <sound/pcm.h>
#include <sound/mpu401.h>
#include <sound/ac97_codec.h>
#include <sound/initval.h>

MODULE_AUTHOR("Zach Brown <zab@zabbo.net>, Takashi Iwai <tiwai@suse.de>");
MODULE_DESCRIPTION("ESS Maestro3 PCI");
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("{{ESS,Maestro3 PCI},"
                "{ESS,ES1988},"
                "{ESS,Allegro PCI},"
                "{ESS,Allegro-1 PCI},"
                "{ESS,Canyon3D-2/LE PCI}}");

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; /* all enabled */
static int external_amp[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1};
static int amp_gpio[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = -1};

module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for " CARD_NAME " soundcard.");
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for " CARD_NAME " soundcard.");
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable this soundcard.");
module_param_array(external_amp, bool, NULL, 0444);
MODULE_PARM_DESC(external_amp, "Enable external amp for " CARD_NAME " soundcard.");
module_param_array(amp_gpio, int, NULL, 0444);
MODULE_PARM_DESC(amp_gpio, "GPIO pin number for external amp. (default = -1)");

#define MAX_PLAYBACKS   2
#define MAX_CAPTURES    1
#define NR_DSPS         (MAX_PLAYBACKS + MAX_CAPTURES)


/*
 * maestro3 registers
 */

/* Allegro PCI configuration registers */
#define PCI_LEGACY_AUDIO_CTRL   0x40
#define SOUND_BLASTER_ENABLE    0x00000001
#define FM_SYNTHESIS_ENABLE     0x00000002
#define GAME_PORT_ENABLE        0x00000004
#define MPU401_IO_ENABLE        0x00000008
#define MPU401_IRQ_ENABLE       0x00000010
#define ALIAS_10BIT_IO          0x00000020
#define SB_DMA_MASK             0x000000C0
#define SB_DMA_0                0x00000040
#define SB_DMA_1                0x00000040
#define SB_DMA_R                0x00000080
#define SB_DMA_3                0x000000C0
#define SB_IRQ_MASK             0x00000700
#define SB_IRQ_5                0x00000000
#define SB_IRQ_7                0x00000100
#define SB_IRQ_9                0x00000200
#define SB_IRQ_10               0x00000300
#define MIDI_IRQ_MASK           0x00003800
#define SERIAL_IRQ_ENABLE       0x00004000
#define DISABLE_LEGACY          0x00008000

#define PCI_ALLEGRO_CONFIG      0x50
#define SB_ADDR_240             0x00000004
#define MPU_ADDR_MASK           0x00000018
#define MPU_ADDR_330            0x00000000
#define MPU_ADDR_300            0x00000008
#define MPU_ADDR_320            0x00000010
#define MPU_ADDR_340            0x00000018
#define USE_PCI_TIMING          0x00000040
#define POSTED_WRITE_ENABLE     0x00000080
#define DMA_POLICY_MASK         0x00000700
#define DMA_DDMA                0x00000000
#define DMA_TDMA                0x00000100
#define DMA_PCPCI               0x00000200
#define DMA_WBDMA16             0x00000400
#define DMA_WBDMA4              0x00000500
#define DMA_WBDMA2              0x00000600
#define DMA_WBDMA1              0x00000700
#define DMA_SAFE_GUARD          0x00000800
#define HI_PERF_GP_ENABLE       0x00001000
#define PIC_SNOOP_MODE_0        0x00002000
#define PIC_SNOOP_MODE_1        0x00004000
#define SOUNDBLASTER_IRQ_MASK   0x00008000
#define RING_IN_ENABLE          0x00010000
#define SPDIF_TEST_MODE         0x00020000
#define CLK_MULT_MODE_SELECT_2  0x00040000
#define EEPROM_WRITE_ENABLE     0x00080000
#define CODEC_DIR_IN            0x00100000
#define HV_BUTTON_FROM_GD       0x00200000
#define REDUCED_DEBOUNCE        0x00400000
#define HV_CTRL_ENABLE          0x00800000
#define SPDIF_ENABLE            0x01000000
#define CLK_DIV_SELECT          0x06000000
#define CLK_DIV_BY_48           0x00000000
#define CLK_DIV_BY_49           0x02000000
#define CLK_DIV_BY_50           0x04000000
#define CLK_DIV_RESERVED        0x06000000
#define PM_CTRL_ENABLE          0x08000000
#define CLK_MULT_MODE_SELECT    0x30000000
#define CLK_MULT_MODE_SHIFT     28
#define CLK_MULT_MODE_0         0x00000000
#define CLK_MULT_MODE_1         0x10000000
#define CLK_MULT_MODE_2         0x20000000
#define CLK_MULT_MODE_3         0x30000000
#define INT_CLK_SELECT          0x40000000
#define INT_CLK_MULT_RESET      0x80000000

/* M3 */
#define INT_CLK_SRC_NOT_PCI     0x00100000
#define INT_CLK_MULT_ENABLE     0x80000000

#define PCI_ACPI_CONTROL        0x54
#define PCI_ACPI_D0             0x00000000
#define PCI_ACPI_D1             0xB4F70000
#define PCI_ACPI_D2             0xB4F7B4F7

#define PCI_USER_CONFIG         0x58
#define EXT_PCI_MASTER_ENABLE   0x00000001
#define SPDIF_OUT_SELECT        0x00000002
#define TEST_PIN_DIR_CTRL       0x00000004
#define AC97_CODEC_TEST         0x00000020
#define TRI_STATE_BUFFER        0x00000080
#define IN_CLK_12MHZ_SELECT     0x00000100
#define MULTI_FUNC_DISABLE      0x00000200
#define EXT_MASTER_PAIR_SEL     0x00000400
#define PCI_MASTER_SUPPORT      0x00000800
#define STOP_CLOCK_ENABLE       0x00001000
#define EAPD_DRIVE_ENABLE       0x00002000
#define REQ_TRI_STATE_ENABLE    0x00004000
#define REQ_LOW_ENABLE          0x00008000
#define MIDI_1_ENABLE           0x00010000
#define MIDI_2_ENABLE           0x00020000
#define SB_AUDIO_SYNC           0x00040000
#define HV_CTRL_TEST            0x00100000
#define SOUNDBLASTER_TEST       0x00400000

#define PCI_USER_CONFIG_C       0x5C

#define PCI_DDMA_CTRL           0x60
#define DDMA_ENABLE             0x00000001


/* Allegro registers */
#define HOST_INT_CTRL           0x18
#define SB_INT_ENABLE           0x0001
#define MPU401_INT_ENABLE       0x0002
#define ASSP_INT_ENABLE         0x0010
#define RING_INT_ENABLE         0x0020
#define HV_INT_ENABLE           0x0040
#define CLKRUN_GEN_ENABLE       0x0100
#define HV_CTRL_TO_PME          0x0400
#define SOFTWARE_RESET_ENABLE   0x8000

/*
 * should be using the above defines, probably.
 */
#define REGB_ENABLE_RESET               0x01
#define REGB_STOP_CLOCK                 0x10

#define HOST_INT_STATUS         0x1A
#define SB_INT_PENDING          0x01
#define MPU401_INT_PENDING      0x02
#define ASSP_INT_PENDING        0x10
#define RING_INT_PENDING        0x20
#define HV_INT_PENDING          0x40

#define HARDWARE_VOL_CTRL       0x1B
#define SHADOW_MIX_REG_VOICE    0x1C
#define HW_VOL_COUNTER_VOICE    0x1D
#define SHADOW_MIX_REG_MASTER   0x1E
#define HW_VOL_COUNTER_MASTER   0x1F

#define CODEC_COMMAND           0x30
#define CODEC_READ_B            0x80

#define CODEC_STATUS            0x30
#define CODEC_BUSY_B            0x01

#define CODEC_DATA              0x32

#define RING_BUS_CTRL_A         0x36
#define RAC_PME_ENABLE          0x0100
#define RAC_SDFS_ENABLE         0x0200
#define LAC_PME_ENABLE          0x0400
#define LAC_SDFS_ENABLE         0x0800
#define SERIAL_AC_LINK_ENABLE   0x1000
#define IO_SRAM_ENABLE          0x2000
#define IIS_INPUT_ENABLE        0x8000

#define RING_BUS_CTRL_B         0x38
#define SECOND_CODEC_ID_MASK    0x0003
#define SPDIF_FUNC_ENABLE       0x0010
#define SECOND_AC_ENABLE        0x0020
#define SB_MODULE_INTF_ENABLE   0x0040
#define SSPE_ENABLE             0x0040
#define M3I_DOCK_ENABLE         0x0080

#define SDO_OUT_DEST_CTRL       0x3A
#define COMMAND_ADDR_OUT        0x0003
#define PCM_LR_OUT_LOCAL        0x0000
#define PCM_LR_OUT_REMOTE       0x0004
#define PCM_LR_OUT_MUTE         0x0008
#define PCM_LR_OUT_BOTH         0x000C
#define LINE1_DAC_OUT_LOCAL     0x0000
#define LINE1_DAC_OUT_REMOTE    0x0010
#define LINE1_DAC_OUT_MUTE      0x0020
#define LINE1_DAC_OUT_BOTH      0x0030
#define PCM_CLS_OUT_LOCAL       0x0000
#define PCM_CLS_OUT_REMOTE      0x0040
#define PCM_CLS_OUT_MUTE        0x0080
#define PCM_CLS_OUT_BOTH        0x00C0
#define PCM_RLF_OUT_LOCAL       0x0000
#define PCM_RLF_OUT_REMOTE      0x0100
#define PCM_RLF_OUT_MUTE        0x0200
#define PCM_RLF_OUT_BOTH        0x0300
#define LINE2_DAC_OUT_LOCAL     0x0000
#define LINE2_DAC_OUT_REMOTE    0x0400
#define LINE2_DAC_OUT_MUTE      0x0800
#define LINE2_DAC_OUT_BOTH      0x0C00
#define HANDSET_OUT_LOCAL       0x0000
#define HANDSET_OUT_REMOTE      0x1000
#define HANDSET_OUT_MUTE        0x2000
#define HANDSET_OUT_BOTH        0x3000
#define IO_CTRL_OUT_LOCAL       0x0000
#define IO_CTRL_OUT_REMOTE      0x4000
#define IO_CTRL_OUT_MUTE        0x8000
#define IO_CTRL_OUT_BOTH        0xC000

#define SDO_IN_DEST_CTRL        0x3C
#define STATUS_ADDR_IN          0x0003
#define PCM_LR_IN_LOCAL         0x0000
#define PCM_LR_IN_REMOTE        0x0004
#define PCM_LR_RESERVED         0x0008
#define PCM_LR_IN_BOTH          0x000C
#define LINE1_ADC_IN_LOCAL      0x0000
#define LINE1_ADC_IN_REMOTE     0x0010
#define LINE1_ADC_IN_MUTE       0x0020
#define MIC_ADC_IN_LOCAL        0x0000
#define MIC_ADC_IN_REMOTE       0x0040
#define MIC_ADC_IN_MUTE         0x0080
#define LINE2_DAC_IN_LOCAL      0x0000
#define LINE2_DAC_IN_REMOTE     0x0400
#define LINE2_DAC_IN_MUTE       0x0800
#define HANDSET_IN_LOCAL        0x0000
#define HANDSET_IN_REMOTE       0x1000
#define HANDSET_IN_MUTE         0x2000
#define IO_STATUS_IN_LOCAL      0x0000
#define IO_STATUS_IN_REMOTE     0x4000

#define SPDIF_IN_CTRL           0x3E
#define SPDIF_IN_ENABLE         0x0001

#define GPIO_DATA               0x60
#define GPIO_DATA_MASK          0x0FFF
#define GPIO_HV_STATUS          0x3000
#define GPIO_PME_STATUS         0x4000

#define GPIO_MASK               0x64
#define GPIO_DIRECTION          0x68
#define GPO_PRIMARY_AC97        0x0001
#define GPI_LINEOUT_SENSE       0x0004
#define GPO_SECONDARY_AC97      0x0008
#define GPI_VOL_DOWN            0x0010
#define GPI_VOL_UP              0x0020
#define GPI_IIS_CLK             0x0040
#define GPI_IIS_LRCLK           0x0080
#define GPI_IIS_DATA            0x0100
#define GPI_DOCKING_STATUS      0x0100
#define GPI_HEADPHONE_SENSE     0x0200
#define GPO_EXT_AMP_SHUTDOWN    0x1000

#define GPO_EXT_AMP_M3          1       /* default m3 amp */
#define GPO_EXT_AMP_ALLEGRO     8       /* default allegro amp */

/* M3 */
#define GPO_M3_EXT_AMP_SHUTDN   0x0002

#define ASSP_INDEX_PORT         0x80
#define ASSP_MEMORY_PORT        0x82
#define ASSP_DATA_PORT          0x84

#define MPU401_DATA_PORT        0x98
#define MPU401_STATUS_PORT      0x99

#define CLK_MULT_DATA_PORT      0x9C

#define ASSP_CONTROL_A          0xA2
#define ASSP_0_WS_ENABLE        0x01
#define ASSP_CTRL_A_RESERVED1   0x02
#define ASSP_CTRL_A_RESERVED2   0x04
#define ASSP_CLK_49MHZ_SELECT   0x08
#define FAST_PLU_ENABLE         0x10
#define ASSP_CTRL_A_RESERVED3   0x20
#define DSP_CLK_36MHZ_SELECT    0x40

#define ASSP_CONTROL_B          0xA4
#define RESET_ASSP              0x00
#define RUN_ASSP                0x01
#define ENABLE_ASSP_CLOCK       0x00
#define STOP_ASSP_CLOCK         0x10
#define RESET_TOGGLE            0x40

#define ASSP_CONTROL_C          0xA6
#define ASSP_HOST_INT_ENABLE    0x01
#define FM_ADDR_REMAP_DISABLE   0x02
#define HOST_WRITE_PORT_ENABLE  0x08

#define ASSP_HOST_INT_STATUS    0xAC
#define DSP2HOST_REQ_PIORECORD  0x01
#define DSP2HOST_REQ_I2SRATE    0x02
#define DSP2HOST_REQ_TIMER      0x04

/* AC97 registers */
/* XXX fix this crap up */
/*#define AC97_RESET              0x00*/

#define AC97_VOL_MUTE_B         0x8000
#define AC97_VOL_M              0x1F
#define AC97_LEFT_VOL_S         8

#define AC97_MASTER_VOL         0x02
#define AC97_LINE_LEVEL_VOL     0x04
#define AC97_MASTER_MONO_VOL    0x06
#define AC97_PC_BEEP_VOL        0x0A
#define AC97_PC_BEEP_VOL_M      0x0F
#define AC97_SROUND_MASTER_VOL  0x38
#define AC97_PC_BEEP_VOL_S      1

/*#define AC97_PHONE_VOL          0x0C
#define AC97_MIC_VOL            0x0E*/
#define AC97_MIC_20DB_ENABLE    0x40

/*#define AC97_LINEIN_VOL         0x10
#define AC97_CD_VOL             0x12
#define AC97_VIDEO_VOL          0x14
#define AC97_AUX_VOL            0x16*/
#define AC97_PCM_OUT_VOL        0x18
/*#define AC97_RECORD_SELECT      0x1A*/
#define AC97_RECORD_MIC         0x00
#define AC97_RECORD_CD          0x01
#define AC97_RECORD_VIDEO       0x02
#define AC97_RECORD_AUX         0x03
#define AC97_RECORD_MONO_MUX    0x02
#define AC97_RECORD_DIGITAL     0x03
#define AC97_RECORD_LINE        0x04
#define AC97_RECORD_STEREO      0x05
#define AC97_RECORD_MONO        0x06
#define AC97_RECORD_PHONE       0x07

/*#define AC97_RECORD_GAIN        0x1C*/
#define AC97_RECORD_VOL_M       0x0F

/*#define AC97_GENERAL_PURPOSE    0x20*/
#define AC97_POWER_DOWN_CTRL    0x26
#define AC97_ADC_READY          0x0001
#define AC97_DAC_READY          0x0002
#define AC97_ANALOG_READY       0x0004
#define AC97_VREF_ON            0x0008
#define AC97_PR0                0x0100
#define AC97_PR1                0x0200
#define AC97_PR2                0x0400
#define AC97_PR3                0x0800
#define AC97_PR4                0x1000

#define AC97_RESERVED1          0x28

#define AC97_VENDOR_TEST        0x5A

#define AC97_CLOCK_DELAY        0x5C
#define AC97_LINEOUT_MUX_SEL    0x0001
#define AC97_MONO_MUX_SEL       0x0002
#define AC97_CLOCK_DELAY_SEL    0x1F
#define AC97_DAC_CDS_SHIFT      6
#define AC97_ADC_CDS_SHIFT      11

#define AC97_MULTI_CHANNEL_SEL  0x74

/*#define AC97_VENDOR_ID1         0x7C
#define AC97_VENDOR_ID2         0x7E*/

/*
 * ASSP control regs
 */
#define DSP_PORT_TIMER_COUNT    0x06

#define DSP_PORT_MEMORY_INDEX   0x80

#define DSP_PORT_MEMORY_TYPE    0x82
#define MEMTYPE_INTERNAL_CODE   0x0002
#define MEMTYPE_INTERNAL_DATA   0x0003
#define MEMTYPE_MASK            0x0003

#define DSP_PORT_MEMORY_DATA    0x84

#define DSP_PORT_CONTROL_REG_A  0xA2
#define DSP_PORT_CONTROL_REG_B  0xA4
#define DSP_PORT_CONTROL_REG_C  0xA6

#define REV_A_CODE_MEMORY_BEGIN         0x0000
#define REV_A_CODE_MEMORY_END           0x0FFF
#define REV_A_CODE_MEMORY_UNIT_LENGTH   0x0040
#define REV_A_CODE_MEMORY_LENGTH        (REV_A_CODE_MEMORY_END - REV_A_CODE_MEMORY_BEGIN + 1)

#define REV_B_CODE_MEMORY_BEGIN         0x0000
#define REV_B_CODE_MEMORY_END           0x0BFF
#define REV_B_CODE_MEMORY_UNIT_LENGTH   0x0040
#define REV_B_CODE_MEMORY_LENGTH        (REV_B_CODE_MEMORY_END - REV_B_CODE_MEMORY_BEGIN + 1)

#define REV_A_DATA_MEMORY_BEGIN         0x1000
#define REV_A_DATA_MEMORY_END           0x2FFF
#define REV_A_DATA_MEMORY_UNIT_LENGTH   0x0080
#define REV_A_DATA_MEMORY_LENGTH        (REV_A_DATA_MEMORY_END - REV_A_DATA_MEMORY_BEGIN + 1)

#define REV_B_DATA_MEMORY_BEGIN         0x1000
#define REV_B_DATA_MEMORY_END           0x2BFF
#define REV_B_DATA_MEMORY_UNIT_LENGTH   0x0080
#define REV_B_DATA_MEMORY_LENGTH        (REV_B_DATA_MEMORY_END - REV_B_DATA_MEMORY_BEGIN + 1)


#define NUM_UNITS_KERNEL_CODE          16
#define NUM_UNITS_KERNEL_DATA           2

#define NUM_UNITS_KERNEL_CODE_WITH_HSP 16
#define NUM_UNITS_KERNEL_DATA_WITH_HSP  5

/*
 * Kernel data layout
 */

#define DP_SHIFT_COUNT                  7

#define KDATA_BASE_ADDR                 0x1000
#define KDATA_BASE_ADDR2                0x1080

#define KDATA_TASK0                     (KDATA_BASE_ADDR + 0x0000)
#define KDATA_TASK1                     (KDATA_BASE_ADDR + 0x0001)
#define KDATA_TASK2                     (KDATA_BASE_ADDR + 0x0002)
#define KDATA_TASK3                     (KDATA_BASE_ADDR + 0x0003)
#define KDATA_TASK4                     (KDATA_BASE_ADDR + 0x0004)
#define KDATA_TASK5                     (KDATA_BASE_ADDR + 0x0005)
#define KDATA_TASK6                     (KDATA_BASE_ADDR + 0x0006)
#define KDATA_TASK7                     (KDATA_BASE_ADDR + 0x0007)
#define KDATA_TASK_ENDMARK              (KDATA_BASE_ADDR + 0x0008)

#define KDATA_CURRENT_TASK              (KDATA_BASE_ADDR + 0x0009)
#define KDATA_TASK_SWITCH               (KDATA_BASE_ADDR + 0x000A)

#define KDATA_INSTANCE0_POS3D           (KDATA_BASE_ADDR + 0x000B)
#define KDATA_INSTANCE1_POS3D           (KDATA_BASE_ADDR + 0x000C)
#define KDATA_INSTANCE2_POS3D           (KDATA_BASE_ADDR + 0x000D)
#define KDATA_INSTANCE3_POS3D           (KDATA_BASE_ADDR + 0x000E)
#define KDATA_INSTANCE4_POS3D           (KDATA_BASE_ADDR + 0x000F)
#define KDATA_INSTANCE5_POS3D           (KDATA_BASE_ADDR + 0x0010)
#define KDATA_INSTANCE6_POS3D           (KDATA_BASE_ADDR + 0x0011)
#define KDATA_INSTANCE7_POS3D           (KDATA_BASE_ADDR + 0x0012)
#define KDATA_INSTANCE8_POS3D           (KDATA_BASE_ADDR + 0x0013)
#define KDATA_INSTANCE_POS3D_ENDMARK    (KDATA_BASE_ADDR + 0x0014)

#define KDATA_INSTANCE0_SPKVIRT         (KDATA_BASE_ADDR + 0x0015)
#define KDATA_INSTANCE_SPKVIRT_ENDMARK  (KDATA_BASE_ADDR + 0x0016)

#define KDATA_INSTANCE0_SPDIF           (KDATA_BASE_ADDR + 0x0017)
#define KDATA_INSTANCE_SPDIF_ENDMARK    (KDATA_BASE_ADDR + 0x0018)

#define KDATA_INSTANCE0_MODEM           (KDATA_BASE_ADDR + 0x0019)
#define KDATA_INSTANCE_MODEM_ENDMARK    (KDATA_BASE_ADDR + 0x001A)

#define KDATA_INSTANCE0_SRC             (KDATA_BASE_ADDR + 0x001B)
#define KDATA_INSTANCE1_SRC             (KDATA_BASE_ADDR + 0x001C)
#define KDATA_INSTANCE_SRC_ENDMARK      (KDATA_BASE_ADDR + 0x001D)

#define KDATA_INSTANCE0_MINISRC         (KDATA_BASE_ADDR + 0x001E)
#define KDATA_INSTANCE1_MINISRC         (KDATA_BASE_ADDR + 0x001F)
#define KDATA_INSTANCE2_MINISRC         (KDATA_BASE_ADDR + 0x0020)
#define KDATA_INSTANCE3_MINISRC         (KDATA_BASE_ADDR + 0x0021)
#define KDATA_INSTANCE_MINISRC_ENDMARK  (KDATA_BASE_ADDR + 0x0022)

#define KDATA_INSTANCE0_CPYTHRU         (KDATA_BASE_ADDR + 0x0023)
#define KDATA_INSTANCE1_CPYTHRU         (KDATA_BASE_ADDR + 0x0024)
#define KDATA_INSTANCE_CPYTHRU_ENDMARK  (KDATA_BASE_ADDR + 0x0025)

#define KDATA_CURRENT_DMA               (KDATA_BASE_ADDR + 0x0026)
#define KDATA_DMA_SWITCH                (KDATA_BASE_ADDR + 0x0027)
#define KDATA_DMA_ACTIVE                (KDATA_BASE_ADDR + 0x0028)

#define KDATA_DMA_XFER0                 (KDATA_BASE_ADDR + 0x0029)
#define KDATA_DMA_XFER1                 (KDATA_BASE_ADDR + 0x002A)
#define KDATA_DMA_XFER2                 (KDATA_BASE_ADDR + 0x002B)
#define KDATA_DMA_XFER3                 (KDATA_BASE_ADDR + 0x002C)
#define KDATA_DMA_XFER4                 (KDATA_BASE_ADDR + 0x002D)
#define KDATA_DMA_XFER5                 (KDATA_BASE_ADDR + 0x002E)
#define KDATA_DMA_XFER6                 (KDATA_BASE_ADDR + 0x002F)
#define KDATA_DMA_XFER7                 (KDATA_BASE_ADDR + 0x0030)
#define KDATA_DMA_XFER8                 (KDATA_BASE_ADDR + 0x0031)
#define KDATA_DMA_XFER_ENDMARK          (KDATA_BASE_ADDR + 0x0032)

#define KDATA_I2S_SAMPLE_COUNT          (KDATA_BASE_ADDR + 0x0033)
#define KDATA_I2S_INT_METER             (KDATA_BASE_ADDR + 0x0034)
#define KDATA_I2S_ACTIVE                (KDATA_BASE_ADDR + 0x0035)

#define KDATA_TIMER_COUNT_RELOAD        (KDATA_BASE_ADDR + 0x0036)
#define KDATA_TIMER_COUNT_CURRENT       (KDATA_BASE_ADDR + 0x0037)

#define KDATA_HALT_SYNCH_CLIENT         (KDATA_BASE_ADDR + 0x0038)
#define KDATA_HALT_SYNCH_DMA            (KDATA_BASE_ADDR + 0x0039)
#define KDATA_HALT_ACKNOWLEDGE          (KDATA_BASE_ADDR + 0x003A)

#define KDATA_ADC1_XFER0                (KDATA_BASE_ADDR + 0x003B)
#define KDATA_ADC1_XFER_ENDMARK         (KDATA_BASE_ADDR + 0x003C)
#define KDATA_ADC1_LEFT_VOLUME                  (KDATA_BASE_ADDR + 0x003D)
#define KDATA_ADC1_RIGHT_VOLUME                 (KDATA_BASE_ADDR + 0x003E)
#define KDATA_ADC1_LEFT_SUR_VOL                 (KDATA_BASE_ADDR + 0x003F)
#define KDATA_ADC1_RIGHT_SUR_VOL                (KDATA_BASE_ADDR + 0x0040)

#define KDATA_ADC2_XFER0                (KDATA_BASE_ADDR + 0x0041)
#define KDATA_ADC2_XFER_ENDMARK         (KDATA_BASE_ADDR + 0x0042)
#define KDATA_ADC2_LEFT_VOLUME                  (KDATA_BASE_ADDR + 0x0043)
#define KDATA_ADC2_RIGHT_VOLUME                 (KDATA_BASE_ADDR + 0x0044)
#define KDATA_ADC2_LEFT_SUR_VOL                 (KDATA_BASE_ADDR + 0x0045)
#define KDATA_ADC2_RIGHT_SUR_VOL                (KDATA_BASE_ADDR + 0x0046)

#define KDATA_CD_XFER0                                  (KDATA_BASE_ADDR + 0x0047)                                      
#define KDATA_CD_XFER_ENDMARK                   (KDATA_BASE_ADDR + 0x0048)
#define KDATA_CD_LEFT_VOLUME                    (KDATA_BASE_ADDR + 0x0049)
#define KDATA_CD_RIGHT_VOLUME                   (KDATA_BASE_ADDR + 0x004A)
#define KDATA_CD_LEFT_SUR_VOL                   (KDATA_BASE_ADDR + 0x004B)
#define KDATA_CD_RIGHT_SUR_VOL                  (KDATA_BASE_ADDR + 0x004C)

#define KDATA_MIC_XFER0                                 (KDATA_BASE_ADDR + 0x004D)
#define KDATA_MIC_XFER_ENDMARK                  (KDATA_BASE_ADDR + 0x004E)
#define KDATA_MIC_VOLUME                                (KDATA_BASE_ADDR + 0x004F)
#define KDATA_MIC_SUR_VOL                               (KDATA_BASE_ADDR + 0x0050)

#define KDATA_I2S_XFER0                 (KDATA_BASE_ADDR + 0x0051)
#define KDATA_I2S_XFER_ENDMARK          (KDATA_BASE_ADDR + 0x0052)

#define KDATA_CHI_XFER0                 (KDATA_BASE_ADDR + 0x0053)
#define KDATA_CHI_XFER_ENDMARK          (KDATA_BASE_ADDR + 0x0054)

#define KDATA_SPDIF_XFER                (KDATA_BASE_ADDR + 0x0055)
#define KDATA_SPDIF_CURRENT_FRAME       (KDATA_BASE_ADDR + 0x0056)
#define KDATA_SPDIF_FRAME0              (KDATA_BASE_ADDR + 0x0057)
#define KDATA_SPDIF_FRAME1              (KDATA_BASE_ADDR + 0x0058)
#define KDATA_SPDIF_FRAME2              (KDATA_BASE_ADDR + 0x0059)

#define KDATA_SPDIF_REQUEST             (KDATA_BASE_ADDR + 0x005A)
#define KDATA_SPDIF_TEMP                (KDATA_BASE_ADDR + 0x005B)

#define KDATA_SPDIFIN_XFER0             (KDATA_BASE_ADDR + 0x005C)
#define KDATA_SPDIFIN_XFER_ENDMARK      (KDATA_BASE_ADDR + 0x005D)
#define KDATA_SPDIFIN_INT_METER         (KDATA_BASE_ADDR + 0x005E)

#define KDATA_DSP_RESET_COUNT           (KDATA_BASE_ADDR + 0x005F)
#define KDATA_DEBUG_OUTPUT              (KDATA_BASE_ADDR + 0x0060)

#define KDATA_KERNEL_ISR_LIST           (KDATA_BASE_ADDR + 0x0061)

#define KDATA_KERNEL_ISR_CBSR1          (KDATA_BASE_ADDR + 0x0062)
#define KDATA_KERNEL_ISR_CBER1          (KDATA_BASE_ADDR + 0x0063)
#define KDATA_KERNEL_ISR_CBCR           (KDATA_BASE_ADDR + 0x0064)
#define KDATA_KERNEL_ISR_AR0            (KDATA_BASE_ADDR + 0x0065)
#define KDATA_KERNEL_ISR_AR1            (KDATA_BASE_ADDR + 0x0066)
#define KDATA_KERNEL_ISR_AR2            (KDATA_BASE_ADDR + 0x0067)
#define KDATA_KERNEL_ISR_AR3            (KDATA_BASE_ADDR + 0x0068)
#define KDATA_KERNEL_ISR_AR4            (KDATA_BASE_ADDR + 0x0069)
#define KDATA_KERNEL_ISR_AR5            (KDATA_BASE_ADDR + 0x006A)
#define KDATA_KERNEL_ISR_BRCR           (KDATA_BASE_ADDR + 0x006B)
#define KDATA_KERNEL_ISR_PASR           (KDATA_BASE_ADDR + 0x006C)
#define KDATA_KERNEL_ISR_PAER           (KDATA_BASE_ADDR + 0x006D)

#define KDATA_CLIENT_SCRATCH0           (KDATA_BASE_ADDR + 0x006E)
#define KDATA_CLIENT_SCRATCH1           (KDATA_BASE_ADDR + 0x006F)
#define KDATA_KERNEL_SCRATCH            (KDATA_BASE_ADDR + 0x0070)
#define KDATA_KERNEL_ISR_SCRATCH        (KDATA_BASE_ADDR + 0x0071)

#define KDATA_OUEUE_LEFT                (KDATA_BASE_ADDR + 0x0072)
#define KDATA_QUEUE_RIGHT               (KDATA_BASE_ADDR + 0x0073)

#define KDATA_ADC1_REQUEST              (KDATA_BASE_ADDR + 0x0074)
#define KDATA_ADC2_REQUEST              (KDATA_BASE_ADDR + 0x0075)
#define KDATA_CD_REQUEST                                (KDATA_BASE_ADDR + 0x0076)
#define KDATA_MIC_REQUEST                               (KDATA_BASE_ADDR + 0x0077)

#define KDATA_ADC1_MIXER_REQUEST        (KDATA_BASE_ADDR + 0x0078)
#define KDATA_ADC2_MIXER_REQUEST        (KDATA_BASE_ADDR + 0x0079)
#define KDATA_CD_MIXER_REQUEST                  (KDATA_BASE_ADDR + 0x007A)
#define KDATA_MIC_MIXER_REQUEST                 (KDATA_BASE_ADDR + 0x007B)
#define KDATA_MIC_SYNC_COUNTER                  (KDATA_BASE_ADDR + 0x007C)

/*
 * second 'segment' (?) reserved for mixer
 * buffers..
 */

#define KDATA_MIXER_WORD0               (KDATA_BASE_ADDR2 + 0x0000)
#define KDATA_MIXER_WORD1               (KDATA_BASE_ADDR2 + 0x0001)
#define KDATA_MIXER_WORD2               (KDATA_BASE_ADDR2 + 0x0002)
#define KDATA_MIXER_WORD3               (KDATA_BASE_ADDR2 + 0x0003)
#define KDATA_MIXER_WORD4               (KDATA_BASE_ADDR2 + 0x0004)
#define KDATA_MIXER_WORD5               (KDATA_BASE_ADDR2 + 0x0005)
#define KDATA_MIXER_WORD6               (KDATA_BASE_ADDR2 + 0x0006)
#define KDATA_MIXER_WORD7               (KDATA_BASE_ADDR2 + 0x0007)
#define KDATA_MIXER_WORD8               (KDATA_BASE_ADDR2 + 0x0008)
#define KDATA_MIXER_WORD9               (KDATA_BASE_ADDR2 + 0x0009)
#define KDATA_MIXER_WORDA               (KDATA_BASE_ADDR2 + 0x000A)
#define KDATA_MIXER_WORDB               (KDATA_BASE_ADDR2 + 0x000B)
#define KDATA_MIXER_WORDC               (KDATA_BASE_ADDR2 + 0x000C)
#define KDATA_MIXER_WORDD               (KDATA_BASE_ADDR2 + 0x000D)
#define KDATA_MIXER_WORDE               (KDATA_BASE_ADDR2 + 0x000E)
#define KDATA_MIXER_WORDF               (KDATA_BASE_ADDR2 + 0x000F)

#define KDATA_MIXER_XFER0               (KDATA_BASE_ADDR2 + 0x0010)
#define KDATA_MIXER_XFER1               (KDATA_BASE_ADDR2 + 0x0011)
#define KDATA_MIXER_XFER2               (KDATA_BASE_ADDR2 + 0x0012)
#define KDATA_MIXER_XFER3               (KDATA_BASE_ADDR2 + 0x0013)
#define KDATA_MIXER_XFER4               (KDATA_BASE_ADDR2 + 0x0014)
#define KDATA_MIXER_XFER5               (KDATA_BASE_ADDR2 + 0x0015)
#define KDATA_MIXER_XFER6               (KDATA_BASE_ADDR2 + 0x0016)
#define KDATA_MIXER_XFER7               (KDATA_BASE_ADDR2 + 0x0017)
#define KDATA_MIXER_XFER8               (KDATA_BASE_ADDR2 + 0x0018)
#define KDATA_MIXER_XFER9               (KDATA_BASE_ADDR2 + 0x0019)
#define KDATA_MIXER_XFER_ENDMARK        (KDATA_BASE_ADDR2 + 0x001A)

#define KDATA_MIXER_TASK_NUMBER         (KDATA_BASE_ADDR2 + 0x001B)
#define KDATA_CURRENT_MIXER             (KDATA_BASE_ADDR2 + 0x001C)
#define KDATA_MIXER_ACTIVE              (KDATA_BASE_ADDR2 + 0x001D)
#define KDATA_MIXER_BANK_STATUS         (KDATA_BASE_ADDR2 + 0x001E)
#define KDATA_DAC_LEFT_VOLUME           (KDATA_BASE_ADDR2 + 0x001F)
#define KDATA_DAC_RIGHT_VOLUME          (KDATA_BASE_ADDR2 + 0x0020)

#define MAX_INSTANCE_MINISRC            (KDATA_INSTANCE_MINISRC_ENDMARK - KDATA_INSTANCE0_MINISRC)
#define MAX_VIRTUAL_DMA_CHANNELS        (KDATA_DMA_XFER_ENDMARK - KDATA_DMA_XFER0)
#define MAX_VIRTUAL_MIXER_CHANNELS      (KDATA_MIXER_XFER_ENDMARK - KDATA_MIXER_XFER0)
#define MAX_VIRTUAL_ADC1_CHANNELS       (KDATA_ADC1_XFER_ENDMARK - KDATA_ADC1_XFER0)

/*
 * client data area offsets
 */
#define CDATA_INSTANCE_READY            0x00

#define CDATA_HOST_SRC_ADDRL            0x01
#define CDATA_HOST_SRC_ADDRH            0x02
#define CDATA_HOST_SRC_END_PLUS_1L      0x03
#define CDATA_HOST_SRC_END_PLUS_1H      0x04
#define CDATA_HOST_SRC_CURRENTL         0x05
#define CDATA_HOST_SRC_CURRENTH         0x06

#define CDATA_IN_BUF_CONNECT            0x07
#define CDATA_OUT_BUF_CONNECT           0x08

#define CDATA_IN_BUF_BEGIN              0x09
#define CDATA_IN_BUF_END_PLUS_1         0x0A
#define CDATA_IN_BUF_HEAD               0x0B
#define CDATA_IN_BUF_TAIL               0x0C
#define CDATA_OUT_BUF_BEGIN             0x0D
#define CDATA_OUT_BUF_END_PLUS_1        0x0E
#define CDATA_OUT_BUF_HEAD              0x0F
#define CDATA_OUT_BUF_TAIL              0x10

#define CDATA_DMA_CONTROL               0x11
#define CDATA_RESERVED                  0x12

#define CDATA_FREQUENCY                 0x13
#define CDATA_LEFT_VOLUME               0x14
#define CDATA_RIGHT_VOLUME              0x15
#define CDATA_LEFT_SUR_VOL              0x16
#define CDATA_RIGHT_SUR_VOL             0x17

#define CDATA_HEADER_LEN                0x18

#define SRC3_DIRECTION_OFFSET           CDATA_HEADER_LEN
#define SRC3_MODE_OFFSET                (CDATA_HEADER_LEN + 1)
#define SRC3_WORD_LENGTH_OFFSET         (CDATA_HEADER_LEN + 2)
#define SRC3_PARAMETER_OFFSET           (CDATA_HEADER_LEN + 3)
#define SRC3_COEFF_ADDR_OFFSET          (CDATA_HEADER_LEN + 8)
#define SRC3_FILTAP_ADDR_OFFSET         (CDATA_HEADER_LEN + 10)
#define SRC3_TEMP_INBUF_ADDR_OFFSET     (CDATA_HEADER_LEN + 16)
#define SRC3_TEMP_OUTBUF_ADDR_OFFSET    (CDATA_HEADER_LEN + 17)

#define MINISRC_IN_BUFFER_SIZE   ( 0x50 * 2 )
#define MINISRC_OUT_BUFFER_SIZE  ( 0x50 * 2 * 2)
#define MINISRC_OUT_BUFFER_SIZE  ( 0x50 * 2 * 2)
#define MINISRC_TMP_BUFFER_SIZE  ( 112 + ( MINISRC_BIQUAD_STAGE * 3 + 4 ) * 2 * 2 )
#define MINISRC_BIQUAD_STAGE    2
#define MINISRC_COEF_LOC          0x175

#define DMACONTROL_BLOCK_MASK           0x000F
#define  DMAC_BLOCK0_SELECTOR           0x0000
#define  DMAC_BLOCK1_SELECTOR           0x0001
#define  DMAC_BLOCK2_SELECTOR           0x0002
#define  DMAC_BLOCK3_SELECTOR           0x0003
#define  DMAC_BLOCK4_SELECTOR           0x0004
#define  DMAC_BLOCK5_SELECTOR           0x0005
#define  DMAC_BLOCK6_SELECTOR           0x0006
#define  DMAC_BLOCK7_SELECTOR           0x0007
#define  DMAC_BLOCK8_SELECTOR           0x0008
#define  DMAC_BLOCK9_SELECTOR           0x0009
#define  DMAC_BLOCKA_SELECTOR           0x000A
#define  DMAC_BLOCKB_SELECTOR           0x000B
#define  DMAC_BLOCKC_SELECTOR           0x000C
#define  DMAC_BLOCKD_SELECTOR           0x000D
#define  DMAC_BLOCKE_SELECTOR           0x000E
#define  DMAC_BLOCKF_SELECTOR           0x000F
#define DMACONTROL_PAGE_MASK            0x00F0
#define  DMAC_PAGE0_SELECTOR            0x0030
#define  DMAC_PAGE1_SELECTOR            0x0020
#define  DMAC_PAGE2_SELECTOR            0x0010
#define  DMAC_PAGE3_SELECTOR            0x0000
#define DMACONTROL_AUTOREPEAT           0x1000
#define DMACONTROL_STOPPED              0x2000
#define DMACONTROL_DIRECTION            0x0100

/*
 * an arbitrary volume we set the internal
 * volume settings to so that the ac97 volume
 * range is a little less insane.  0x7fff is 
 * max.
 */
#define ARB_VOLUME ( 0x6800 )

/*
 */

typedef struct snd_m3_dma m3_dma_t;
typedef struct snd_m3 m3_t;

/* quirk lists */
struct m3_quirk {
        const char *name;       /* device name */
        u16 vendor, device;     /* subsystem ids */
        int amp_gpio;           /* gpio pin #  for external amp, -1 = default */
        int irda_workaround;    /* non-zero if avoid to touch 0x10 on GPIO_DIRECTION
                                   (e.g. for IrDA on Dell Inspirons) */
};

struct m3_list {
        int curlen;
        int mem_addr;
        int max;
};

struct snd_m3_dma {

        int number;
        m3_t *chip;
        snd_pcm_substream_t *substream;

        struct assp_instance {
                unsigned short code, data;
        } inst;

        int running;
        int opened;

        unsigned long buffer_addr;
        int dma_size;
        int period_size;
        unsigned int hwptr;
        int count;

        int index[3];
        struct m3_list *index_list[3];

        int in_lists;
        
        struct list_head list;

};
    
struct snd_m3 {
        
        snd_card_t *card;

        unsigned long iobase;

        int irq;
        int allegro_flag : 1;

        ac97_t *ac97;

        snd_pcm_t *pcm;

        struct pci_dev *pci;
        struct m3_quirk *quirk;

        int dacs_active;
        int timer_users;

        struct m3_list  msrc_list;
        struct m3_list  mixer_list;
        struct m3_list  adc1_list;
        struct m3_list  dma_list;

        /* for storing reset state..*/
        u8 reset_state;

        int external_amp;
        int amp_gpio;

        /* midi */
        snd_rawmidi_t *rmidi;

        /* pcm streams */
        int num_substreams;
        m3_dma_t *substreams;

        spinlock_t reg_lock;

#ifdef CONFIG_PM
        u16 *suspend_mem;
#endif
};

/*
 * pci ids
 */

#ifndef PCI_VENDOR_ID_ESS
#define PCI_VENDOR_ID_ESS         0x125D
#endif
#ifndef PCI_DEVICE_ID_ESS_ALLEGRO_1
#define PCI_DEVICE_ID_ESS_ALLEGRO_1     0x1988
#endif
#ifndef PCI_DEVICE_ID_ESS_ALLEGRO
#define PCI_DEVICE_ID_ESS_ALLEGRO       0x1989
#endif
#ifndef PCI_DEVICE_ID_ESS_CANYON3D_2LE
#define PCI_DEVICE_ID_ESS_CANYON3D_2LE  0x1990
#endif
#ifndef PCI_DEVICE_ID_ESS_CANYON3D_2
#define PCI_DEVICE_ID_ESS_CANYON3D_2    0x1992
#endif
#ifndef PCI_DEVICE_ID_ESS_MAESTRO3
#define PCI_DEVICE_ID_ESS_MAESTRO3      0x1998
#endif
#ifndef PCI_DEVICE_ID_ESS_MAESTRO3_1
#define PCI_DEVICE_ID_ESS_MAESTRO3_1    0x1999
#endif
#ifndef PCI_DEVICE_ID_ESS_MAESTRO3_HW
#define PCI_DEVICE_ID_ESS_MAESTRO3_HW   0x199a
#endif
#ifndef PCI_DEVICE_ID_ESS_MAESTRO3_2
#define PCI_DEVICE_ID_ESS_MAESTRO3_2    0x199b
#endif

static struct pci_device_id snd_m3_ids[] = {
        {PCI_VENDOR_ID_ESS, PCI_DEVICE_ID_ESS_ALLEGRO_1, PCI_ANY_ID, PCI_ANY_ID,
         PCI_CLASS_MULTIMEDIA_AUDIO << 8, 0xffff00, 0},
        {PCI_VENDOR_ID_ESS, PCI_DEVICE_ID_ESS_ALLEGRO, PCI_ANY_ID, PCI_ANY_ID,
         PCI_CLASS_MULTIMEDIA_AUDIO << 8, 0xffff00, 0},
        {PCI_VENDOR_ID_ESS, PCI_DEVICE_ID_ESS_CANYON3D_2LE, PCI_ANY_ID, PCI_ANY_ID,
         PCI_CLASS_MULTIMEDIA_AUDIO << 8, 0xffff00, 0},
        {PCI_VENDOR_ID_ESS, PCI_DEVICE_ID_ESS_CANYON3D_2, PCI_ANY_ID, PCI_ANY_ID,
         PCI_CLASS_MULTIMEDIA_AUDIO << 8, 0xffff00, 0},
        {PCI_VENDOR_ID_ESS, PCI_DEVICE_ID_ESS_MAESTRO3, PCI_ANY_ID, PCI_ANY_ID,
         PCI_CLASS_MULTIMEDIA_AUDIO << 8, 0xffff00, 0},
        {PCI_VENDOR_ID_ESS, PCI_DEVICE_ID_ESS_MAESTRO3_1, PCI_ANY_ID, PCI_ANY_ID,
         PCI_CLASS_MULTIMEDIA_AUDIO << 8, 0xffff00, 0},
        {PCI_VENDOR_ID_ESS, PCI_DEVICE_ID_ESS_MAESTRO3_HW, PCI_ANY_ID, PCI_ANY_ID,
         PCI_CLASS_MULTIMEDIA_AUDIO << 8, 0xffff00, 0},
        {PCI_VENDOR_ID_ESS, PCI_DEVICE_ID_ESS_MAESTRO3_2, PCI_ANY_ID, PCI_ANY_ID,
         PCI_CLASS_MULTIMEDIA_AUDIO << 8, 0xffff00, 0},
        {0,},
};

MODULE_DEVICE_TABLE(pci, snd_m3_ids);

static struct m3_quirk m3_quirk_list[] = {
        /* panasonic CF-28 "toughbook" */
        {
                .name = "Panasonic CF-28",
                .vendor = 0x10f7,
                .device = 0x833e,
                .amp_gpio = 0x0d,
        },
        /* panasonic CF-72 "toughbook" */
        {
                .name = "Panasonic CF-72",
                .vendor = 0x10f7,
                .device = 0x833d,
                .amp_gpio = 0x0d,
        },
        /* Dell Inspiron 4000 */
        {
                .name = "Dell Inspiron 4000",
                .vendor = 0x1028,
                .device = 0x00b0,
                .amp_gpio = -1,
                .irda_workaround = 1,
        },
        /* Dell Inspiron 8000 */
        {
                .name = "Dell Inspiron 8000",
                .vendor = 0x1028,
                .device = 0x00a4,
                .amp_gpio = -1,
                .irda_workaround = 1,
        },
        /* Dell Inspiron 8100 */
        {
                .name = "Dell Inspiron 8100",
                .vendor = 0x1028,
                .device = 0x00e6,
                .amp_gpio = -1,
                .irda_workaround = 1,
        },
        /* NEC LM800J/7 */
        {
                .name = "NEC LM800J/7",
                .vendor = 0x1033,
                .device = 0x80f1,
                .amp_gpio = 0x03,
        },
        /* END */
        { NULL }
};


/*
 * lowlevel functions
 */

#define big_mdelay(msec) do {\
        set_current_state(TASK_UNINTERRUPTIBLE);\
        schedule_timeout(((msec) * HZ) / 1000);\
} while (0)
        
inline static void snd_m3_outw(m3_t *chip, u16 value, unsigned long reg)
{
        outw(value, chip->iobase + reg);
}

inline static u16 snd_m3_inw(m3_t *chip, unsigned long reg)
{
        return inw(chip->iobase + reg);
}

inline static void snd_m3_outb(m3_t *chip, u8 value, unsigned long reg)
{
        outb(value, chip->iobase + reg);
}

inline static u8 snd_m3_inb(m3_t *chip, unsigned long reg)
{
        return inb(chip->iobase + reg);
}

/*
 * access 16bit words to the code or data regions of the dsp's memory.
 * index addresses 16bit words.
 */
static u16 snd_m3_assp_read(m3_t *chip, u16 region, u16 index)
{
        snd_m3_outw(chip, region & MEMTYPE_MASK, DSP_PORT_MEMORY_TYPE);

        snd_m3_outw(chip, index, DSP_PORT_MEMORY_INDEX);
        return snd_m3_inw(chip, DSP_PORT_MEMORY_DATA);
}

static void snd_m3_assp_write(m3_t *chip, u16 region, u16 index, u16 data)
{
        snd_m3_outw(chip, region & MEMTYPE_MASK, DSP_PORT_MEMORY_TYPE);
        snd_m3_outw(chip, index, DSP_PORT_MEMORY_INDEX);
        snd_m3_outw(chip, data, DSP_PORT_MEMORY_DATA);
}

static void snd_m3_assp_halt(m3_t *chip)
{
        chip->reset_state = snd_m3_inb(chip, DSP_PORT_CONTROL_REG_B) & ~REGB_STOP_CLOCK;
        big_mdelay(10);
        snd_m3_outb(chip, chip->reset_state & ~REGB_ENABLE_RESET, DSP_PORT_CONTROL_REG_B);
}

static void snd_m3_assp_continue(m3_t *chip)
{
        snd_m3_outb(chip, chip->reset_state | REGB_ENABLE_RESET, DSP_PORT_CONTROL_REG_B);
}


/*
 * This makes me sad. the maestro3 has lists
 * internally that must be packed.. 0 terminates,
 * apparently, or maybe all unused entries have
 * to be 0, the lists have static lengths set
 * by the binary code images.
 */

static int snd_m3_add_list(m3_t *chip, struct m3_list *list, u16 val)
{
        snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA,
                          list->mem_addr + list->curlen,
                          val);
        return list->curlen++;
}

static void snd_m3_remove_list(m3_t *chip, struct m3_list *list, int index)
{
        u16  val;
        int lastindex = list->curlen - 1;

        if (index != lastindex) {
                val = snd_m3_assp_read(chip, MEMTYPE_INTERNAL_DATA,
                                       list->mem_addr + lastindex);
                snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA,
                                  list->mem_addr + index,
                                  val);
        }

        snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA,
                          list->mem_addr + lastindex,
                          0);

        list->curlen--;
}

static void snd_m3_inc_timer_users(m3_t *chip)
{
        chip->timer_users++;
        if (chip->timer_users != 1) 
                return;

        snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA,
                          KDATA_TIMER_COUNT_RELOAD,
                          240);

        snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA,
                          KDATA_TIMER_COUNT_CURRENT,
                          240);

        snd_m3_outw(chip,
                    snd_m3_inw(chip, HOST_INT_CTRL) | CLKRUN_GEN_ENABLE,
                    HOST_INT_CTRL);
}

static void snd_m3_dec_timer_users(m3_t *chip)
{
        chip->timer_users--;
        if (chip->timer_users > 0)  
                return;

        snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA,
                          KDATA_TIMER_COUNT_RELOAD,
                          0);

        snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA,
                          KDATA_TIMER_COUNT_CURRENT,
                          0);

        snd_m3_outw(chip,
                    snd_m3_inw(chip, HOST_INT_CTRL) & ~CLKRUN_GEN_ENABLE,
                    HOST_INT_CTRL);
}

/*
 * start/stop
 */

/* spinlock held! */
static int snd_m3_pcm_start(m3_t *chip, m3_dma_t *s, snd_pcm_substream_t *subs)
{
        if (! s || ! subs)
                return -EINVAL;

        snd_m3_inc_timer_users(chip);
        switch (subs->stream) {
        case SNDRV_PCM_STREAM_PLAYBACK:
                chip->dacs_active++;
                snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA,
                                  s->inst.data + CDATA_INSTANCE_READY, 1);
                snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA,
                                  KDATA_MIXER_TASK_NUMBER,
                                  chip->dacs_active);
                break;
        case SNDRV_PCM_STREAM_CAPTURE:
                snd_m3_assp_write(s->chip, MEMTYPE_INTERNAL_DATA,
                                  KDATA_ADC1_REQUEST, 1);
                snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA,
                                  s->inst.data + CDATA_INSTANCE_READY, 1);
                break;
        }
        return 0;
}

/* spinlock held! */
static int snd_m3_pcm_stop(m3_t *chip, m3_dma_t *s, snd_pcm_substream_t *subs)
{
        if (! s || ! subs)
                return -EINVAL;

        snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA,
                          s->inst.data + CDATA_INSTANCE_READY, 0);
        snd_m3_dec_timer_users(chip);
        switch (subs->stream) {
        case SNDRV_PCM_STREAM_PLAYBACK:
                chip->dacs_active--;
                snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA,
                                  KDATA_MIXER_TASK_NUMBER, 
                                  chip->dacs_active);
                break;
        case SNDRV_PCM_STREAM_CAPTURE:
                snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA,
                                  KDATA_ADC1_REQUEST, 0);
                break;
        }
        return 0;
}

static int
snd_m3_pcm_trigger(snd_pcm_substream_t *subs, int cmd)
{
        m3_t *chip = snd_pcm_substream_chip(subs);
        m3_dma_t *s = (m3_dma_t*)subs->runtime->private_data;
        int err = -EINVAL;

        snd_assert(s != NULL, return -ENXIO);

        spin_lock(&chip->reg_lock);
        switch (cmd) {
        case SNDRV_PCM_TRIGGER_START:
        case SNDRV_PCM_TRIGGER_RESUME:
                if (s->running)
                        err = -EBUSY;
                else {
                        s->running = 1;
                        err = snd_m3_pcm_start(chip, s, subs);
                }
                break;
        case SNDRV_PCM_TRIGGER_STOP:
        case SNDRV_PCM_TRIGGER_SUSPEND:
                if (! s->running)
                        err = 0; /* should return error? */
                else {
                        s->running = 0;
                        err = snd_m3_pcm_stop(chip, s, subs);
                }
                break;
        }
        spin_unlock(&chip->reg_lock);
        return err;
}

/*
 * setup
 */
static void 
snd_m3_pcm_setup1(m3_t *chip, m3_dma_t *s, snd_pcm_substream_t *subs)
{
        int dsp_in_size, dsp_out_size, dsp_in_buffer, dsp_out_buffer;
        snd_pcm_runtime_t *runtime = subs->runtime;

        if (subs->stream == SNDRV_PCM_STREAM_PLAYBACK) {
                dsp_in_size = MINISRC_IN_BUFFER_SIZE - (0x20 * 2);
                dsp_out_size = MINISRC_OUT_BUFFER_SIZE - (0x20 * 2);
        } else {
                dsp_in_size = MINISRC_IN_BUFFER_SIZE - (0x10 * 2);
                dsp_out_size = MINISRC_OUT_BUFFER_SIZE - (0x10 * 2);
        }
        dsp_in_buffer = s->inst.data + (MINISRC_TMP_BUFFER_SIZE / 2);
        dsp_out_buffer = dsp_in_buffer + (dsp_in_size / 2) + 1;

        s->dma_size = frames_to_bytes(runtime, runtime->buffer_size);
        s->period_size = frames_to_bytes(runtime, runtime->period_size);
        s->hwptr = 0;
        s->count = 0;

#define LO(x) ((x) & 0xffff)
#define HI(x) LO((x) >> 16)

        /* host dma buffer pointers */
        snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA,
                          s->inst.data + CDATA_HOST_SRC_ADDRL,
                          LO(s->buffer_addr));

        snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA,
                          s->inst.data + CDATA_HOST_SRC_ADDRH,
                          HI(s->buffer_addr));

        snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA,
                          s->inst.data + CDATA_HOST_SRC_END_PLUS_1L,
                          LO(s->buffer_addr + s->dma_size));

        snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA,
                          s->inst.data + CDATA_HOST_SRC_END_PLUS_1H,
                          HI(s->buffer_addr + s->dma_size));

        snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA,
                          s->inst.data + CDATA_HOST_SRC_CURRENTL,
                          LO(s->buffer_addr));

        snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA,
                          s->inst.data + CDATA_HOST_SRC_CURRENTH,
                          HI(s->buffer_addr));
#undef LO
#undef HI

        /* dsp buffers */

        snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA,
                          s->inst.data + CDATA_IN_BUF_BEGIN,
                          dsp_in_buffer);

        snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA,
                          s->inst.data + CDATA_IN_BUF_END_PLUS_1,
                          dsp_in_buffer + (dsp_in_size / 2));

        snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA,
                          s->inst.data + CDATA_IN_BUF_HEAD,
                          dsp_in_buffer);
    
        snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA,
                          s->inst.data + CDATA_IN_BUF_TAIL,
                          dsp_in_buffer);

        snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA,
                          s->inst.data + CDATA_OUT_BUF_BEGIN,
                          dsp_out_buffer);

        snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA,
                          s->inst.data + CDATA_OUT_BUF_END_PLUS_1,
                          dsp_out_buffer + (dsp_out_size / 2));

        snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA,
                          s->inst.data + CDATA_OUT_BUF_HEAD,
                          dsp_out_buffer);

        snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA,
                          s->inst.data + CDATA_OUT_BUF_TAIL,
                          dsp_out_buffer);
}

static void snd_m3_pcm_setup2(m3_t *chip, m3_dma_t *s, snd_pcm_runtime_t *runtime)
{
        u32 freq;

        /* 
         * put us in the lists if we're not already there
         */
        if (! s->in_lists) {
                s->index[0] = snd_m3_add_list(chip, s->index_list[0],
                                              s->inst.data >> DP_SHIFT_COUNT);
                s->index[1] = snd_m3_add_list(chip, s->index_list[1],
                                              s->inst.data >> DP_SHIFT_COUNT);
                s->index[2] = snd_m3_add_list(chip, s->index_list[2],
                                              s->inst.data >> DP_SHIFT_COUNT);
                s->in_lists = 1;
        }

        /* write to 'mono' word */
        snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA,
                          s->inst.data + SRC3_DIRECTION_OFFSET + 1, 
                          runtime->channels == 2 ? 0 : 1);
        /* write to '8bit' word */
        snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA,
                          s->inst.data + SRC3_DIRECTION_OFFSET + 2, 
                          snd_pcm_format_width(runtime->format) == 16 ? 0 : 1);

        /* set up dac/adc rate */
        freq = ((runtime->rate << 15) + 24000 ) / 48000;
        if (freq) 
                freq--;

        snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA,
                          s->inst.data + CDATA_FREQUENCY,
                          freq);
}


static struct play_vals {
        u16 addr, val;
} pv[] = {
        {CDATA_LEFT_VOLUME, ARB_VOLUME},
        {CDATA_RIGHT_VOLUME, ARB_VOLUME},
        {SRC3_DIRECTION_OFFSET, 0} ,
        /* +1, +2 are stereo/16 bit */
        {SRC3_DIRECTION_OFFSET + 3, 0x0000}, /* fraction? */
        {SRC3_DIRECTION_OFFSET + 4, 0}, /* first l */
        {SRC3_DIRECTION_OFFSET + 5, 0}, /* first r */
        {SRC3_DIRECTION_OFFSET + 6, 0}, /* second l */
        {SRC3_DIRECTION_OFFSET + 7, 0}, /* second r */
        {SRC3_DIRECTION_OFFSET + 8, 0}, /* delta l */
        {SRC3_DIRECTION_OFFSET + 9, 0}, /* delta r */
        {SRC3_DIRECTION_OFFSET + 10, 0x8000}, /* round */
        {SRC3_DIRECTION_OFFSET + 11, 0xFF00}, /* higher bute mark */
        {SRC3_DIRECTION_OFFSET + 13, 0}, /* temp0 */
        {SRC3_DIRECTION_OFFSET + 14, 0}, /* c fraction */
        {SRC3_DIRECTION_OFFSET + 15, 0}, /* counter */
        {SRC3_DIRECTION_OFFSET + 16, 8}, /* numin */
        {SRC3_DIRECTION_OFFSET + 17, 50*2}, /* numout */
        {SRC3_DIRECTION_OFFSET + 18, MINISRC_BIQUAD_STAGE - 1}, /* numstage */
        {SRC3_DIRECTION_OFFSET + 20, 0}, /* filtertap */
        {SRC3_DIRECTION_OFFSET + 21, 0} /* booster */
};


/* the mode passed should be already shifted and masked */
static void
snd_m3_playback_setup(m3_t *chip, m3_dma_t *s, snd_pcm_substream_t *subs)
{
        unsigned int i;

        /*
         * some per client initializers
         */

        snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA,
                          s->inst.data + SRC3_DIRECTION_OFFSET + 12,
                          s->inst.data + 40 + 8);

        snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA,
                          s->inst.data + SRC3_DIRECTION_OFFSET + 19,
                          s->inst.code + MINISRC_COEF_LOC);

        /* enable or disable low pass filter? */
        snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA,
                          s->inst.data + SRC3_DIRECTION_OFFSET + 22,
                          subs->runtime->rate > 45000 ? 0xff : 0);
    
        /* tell it which way dma is going? */
        snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA,
                          s->inst.data + CDATA_DMA_CONTROL,
                          DMACONTROL_AUTOREPEAT + DMAC_PAGE3_SELECTOR + DMAC_BLOCKF_SELECTOR);

        /*
         * set an armload of static initializers
         */
        for (i = 0; i < ARRAY_SIZE(pv); i++) 
                snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA,
                                  s->inst.data + pv[i].addr, pv[i].val);
}

/*
 *    Native record driver 
 */
static struct rec_vals {
        u16 addr, val;
} rv[] = {
        {CDATA_LEFT_VOLUME, ARB_VOLUME},
        {CDATA_RIGHT_VOLUME, ARB_VOLUME},
        {SRC3_DIRECTION_OFFSET, 1} ,
        /* +1, +2 are stereo/16 bit */
        {SRC3_DIRECTION_OFFSET + 3, 0x0000}, /* fraction? */
        {SRC3_DIRECTION_OFFSET + 4, 0}, /* first l */
        {SRC3_DIRECTION_OFFSET + 5, 0}, /* first r */
        {SRC3_DIRECTION_OFFSET + 6, 0}, /* second l */
        {SRC3_DIRECTION_OFFSET + 7, 0}, /* second r */
        {SRC3_DIRECTION_OFFSET + 8, 0}, /* delta l */
        {SRC3_DIRECTION_OFFSET + 9, 0}, /* delta r */
        {SRC3_DIRECTION_OFFSET + 10, 0x8000}, /* round */
        {SRC3_DIRECTION_OFFSET + 11, 0xFF00}, /* higher bute mark */
        {SRC3_DIRECTION_OFFSET + 13, 0}, /* temp0 */
        {SRC3_DIRECTION_OFFSET + 14, 0}, /* c fraction */
        {SRC3_DIRECTION_OFFSET + 15, 0}, /* counter */
        {SRC3_DIRECTION_OFFSET + 16, 50},/* numin */
        {SRC3_DIRECTION_OFFSET + 17, 8}, /* numout */
        {SRC3_DIRECTION_OFFSET + 18, 0}, /* numstage */
        {SRC3_DIRECTION_OFFSET + 19, 0}, /* coef */
        {SRC3_DIRECTION_OFFSET + 20, 0}, /* filtertap */
        {SRC3_DIRECTION_OFFSET + 21, 0}, /* booster */
        {SRC3_DIRECTION_OFFSET + 22, 0xff} /* skip lpf */
};

static void
snd_m3_capture_setup(m3_t *chip, m3_dma_t *s, snd_pcm_substream_t *subs)
{
        unsigned int i;

        /*
         * some per client initializers
         */

        snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA,
                          s->inst.data + SRC3_DIRECTION_OFFSET + 12,
                          s->inst.data + 40 + 8);

        /* tell it which way dma is going? */
        snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA,
                          s->inst.data + CDATA_DMA_CONTROL,
                          DMACONTROL_DIRECTION + DMACONTROL_AUTOREPEAT + 
                          DMAC_PAGE3_SELECTOR + DMAC_BLOCKF_SELECTOR);

        /*
         * set an armload of static initializers
         */
        for (i = 0; i < ARRAY_SIZE(rv); i++) 
                snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA,
                                  s->inst.data + rv[i].addr, rv[i].val);
}

static int snd_m3_pcm_hw_params(snd_pcm_substream_t * substream,
                                snd_pcm_hw_params_t * hw_params)
{
        m3_dma_t *s = (m3_dma_t*) substream->runtime->private_data;
        int err;

        if ((err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params))) < 0)
                return err;
        /* set buffer address */
        s->buffer_addr = substream->runtime->dma_addr;
        if (s->buffer_addr & 0x3) {
                snd_printk("oh my, not aligned\n");
                s->buffer_addr = s->buffer_addr & ~0x3;
        }
        return 0;
}

static int snd_m3_pcm_hw_free(snd_pcm_substream_t * substream)
{
        m3_dma_t *s;
        
        if (substream->runtime->private_data == NULL)
                return 0;
        s = (m3_dma_t*) substream->runtime->private_data;
        snd_pcm_lib_free_pages(substream);
        s->buffer_addr = 0;
        return 0;
}

static int
snd_m3_pcm_prepare(snd_pcm_substream_t *subs)
{
        m3_t *chip = snd_pcm_substream_chip(subs);
        snd_pcm_runtime_t *runtime = subs->runtime;
        m3_dma_t *s = (m3_dma_t*)runtime->private_data;

        snd_assert(s != NULL, return -ENXIO);

        if (runtime->format != SNDRV_PCM_FORMAT_U8 &&
            runtime->format != SNDRV_PCM_FORMAT_S16_LE)
                return -EINVAL;
        if (runtime->rate > 48000 ||
            runtime->rate < 8000)
                return -EINVAL;

        spin_lock_irq(&chip->reg_lock);

        snd_m3_pcm_setup1(chip, s, subs);

        if (subs->stream == SNDRV_PCM_STREAM_PLAYBACK)
                snd_m3_playback_setup(chip, s, subs);
        else
                snd_m3_capture_setup(chip, s, subs);

        snd_m3_pcm_setup2(chip, s, runtime);

        spin_unlock_irq(&chip->reg_lock);

        return 0;
}

/*
 * get current pointer
 */
static unsigned int
snd_m3_get_pointer(m3_t *chip, m3_dma_t *s, snd_pcm_substream_t *subs)
{
        u16 hi = 0, lo = 0;
        int retry = 10;
        u32 addr;

        /*
         * try and get a valid answer
         */
        while (retry--) {
                hi =  snd_m3_assp_read(chip, MEMTYPE_INTERNAL_DATA,
                                       s->inst.data + CDATA_HOST_SRC_CURRENTH);

                lo = snd_m3_assp_read(chip, MEMTYPE_INTERNAL_DATA,
                                      s->inst.data + CDATA_HOST_SRC_CURRENTL);

                if (hi == snd_m3_assp_read(chip, MEMTYPE_INTERNAL_DATA,
                                           s->inst.data + CDATA_HOST_SRC_CURRENTH))
                        break;
        }
        addr = lo | ((u32)hi<<16);
        return (unsigned int)(addr - s->buffer_addr);
}

static snd_pcm_uframes_t
snd_m3_pcm_pointer(snd_pcm_substream_t * subs)
{
        m3_t *chip = snd_pcm_substream_chip(subs);
        unsigned int ptr;
        m3_dma_t *s = (m3_dma_t*)subs->runtime->private_data;
        snd_assert(s != NULL, return 0);

        spin_lock(&chip->reg_lock);
        ptr = snd_m3_get_pointer(chip, s, subs);
        spin_unlock(&chip->reg_lock);
        return bytes_to_frames(subs->runtime, ptr);
}


/* update pointer */
/* spinlock held! */
static void snd_m3_update_ptr(m3_t *chip, m3_dma_t *s)
{
        snd_pcm_substream_t *subs = s->substream;
        unsigned int hwptr;
        int diff;

        if (! s->running)
                return;

        hwptr = snd_m3_get_pointer(chip, s, subs) % s->dma_size;
        diff = (s->dma_size + hwptr - s->hwptr) % s->dma_size;
        s->hwptr = hwptr;
        s->count += diff;
        if (s->count >= (signed)s->period_size) {
                s->count %= s->period_size;
                spin_unlock(&chip->reg_lock);
                snd_pcm_period_elapsed(subs);
                spin_lock(&chip->reg_lock);
        }
}

static irqreturn_t
snd_m3_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
        m3_t *chip = dev_id;
        u8 status;
        int i;

        status = inb(chip->iobase + HOST_INT_STATUS);

        if (status == 0xff)
                return IRQ_NONE;
   
        /*
         * ack an assp int if its running
         * and has an int pending
         */
        if (status & ASSP_INT_PENDING) {
                u8 ctl = inb(chip->iobase + ASSP_CONTROL_B);
                if (!(ctl & STOP_ASSP_CLOCK)) {
                        ctl = inb(chip->iobase + ASSP_HOST_INT_STATUS);
                        if (ctl & DSP2HOST_REQ_TIMER) {
                                outb(DSP2HOST_REQ_TIMER, chip->iobase + ASSP_HOST_INT_STATUS);
                                /* update adc/dac info if it was a timer int */
                                spin_lock(&chip->reg_lock);
                                for (i = 0; i < chip->num_substreams; i++) {
                                        m3_dma_t *s = &chip->substreams[i];
                                        if (s->running)
                                                snd_m3_update_ptr(chip, s);
                                }
                                spin_unlock(&chip->reg_lock);
                        }
                }
        }

#if 0 /* TODO: not supported yet */
        if ((status & MPU401_INT_PENDING) && chip->rmidi)
                snd_mpu401_uart_interrupt(irq, chip->rmidi->private_data, regs);
#endif

        /* ack ints */
        snd_m3_outw(chip, HOST_INT_STATUS, status);

        return IRQ_HANDLED;
}


/*
 */

static snd_pcm_hardware_t snd_m3_playback =
{
        .info =                 (SNDRV_PCM_INFO_MMAP |
                                 SNDRV_PCM_INFO_INTERLEAVED |
                                 SNDRV_PCM_INFO_MMAP_VALID |
                                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
                                 /*SNDRV_PCM_INFO_PAUSE |*/
                                 SNDRV_PCM_INFO_RESUME),
        .formats =              SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
        .rates =                SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
        .rate_min =             8000,
        .rate_max =             48000,
        .channels_min =         1,
        .channels_max =         2,
        .buffer_bytes_max =     (512*1024),
        .period_bytes_min =     64,
        .period_bytes_max =     (512*1024),
        .periods_min =          1,
        .periods_max =          1024,
};

static snd_pcm_hardware_t snd_m3_capture =
{
        .info =                 (SNDRV_PCM_INFO_MMAP |
                                 SNDRV_PCM_INFO_INTERLEAVED |
                                 SNDRV_PCM_INFO_MMAP_VALID |
                                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
                                 /*SNDRV_PCM_INFO_PAUSE |*/
                                 SNDRV_PCM_INFO_RESUME),
        .formats =              SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
        .rates =                SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
        .rate_min =             8000,
        .rate_max =             48000,
        .channels_min =         1,
        .channels_max =         2,
        .buffer_bytes_max =     (512*1024),
        .period_bytes_min =     64,
        .period_bytes_max =     (512*1024),
        .periods_min =          1,
        .periods_max =          1024,
};


/*
 */

static int
snd_m3_substream_open(m3_t *chip, snd_pcm_substream_t *subs)
{
        int i;
        m3_dma_t *s;

        spin_lock_irq(&chip->reg_lock);
        for (i = 0; i < chip->num_substreams; i++) {
                s = &chip->substreams[i];
                if (! s->opened)
                        goto __found;
        }
        spin_unlock_irq(&chip->reg_lock);
        return -ENOMEM;
__found:
        s->opened = 1;
        s->running = 0;
        spin_unlock_irq(&chip->reg_lock);

        subs->runtime->private_data = s;
        s->substream = subs;

        /* set list owners */
        if (subs->stream == SNDRV_PCM_STREAM_PLAYBACK) {
                s->index_list[0] = &chip->mixer_list;
        } else
                s->index_list[0] = &chip->adc1_list;
        s->index_list[1] = &chip->msrc_list;
        s->index_list[2] = &chip->dma_list;

        return 0;
}

static void
snd_m3_substream_close(m3_t *chip, snd_pcm_substream_t *subs)
{
        m3_dma_t *s = (m3_dma_t*) subs->runtime->private_data;

        if (s == NULL)
                return; /* not opened properly */

        spin_lock_irq(&chip->reg_lock);
        if (s->substream && s->running)
                snd_m3_pcm_stop(chip, s, s->substream); /* does this happen? */
        if (s->in_lists) {
                snd_m3_remove_list(chip, s->index_list[0], s->index[0]);
                snd_m3_remove_list(chip, s->index_list[1], s->index[1]);
                snd_m3_remove_list(chip, s->index_list[2], s->index[2]);
                s->in_lists = 0;
        }
        s->running = 0;
        s->opened = 0;
        spin_unlock_irq(&chip->reg_lock);
}

static int
snd_m3_playback_open(snd_pcm_substream_t *subs)
{
        m3_t *chip = snd_pcm_substream_chip(subs);
        snd_pcm_runtime_t *runtime = subs->runtime;
        int err;

        if ((err = snd_m3_substream_open(chip, subs)) < 0)
                return err;

        runtime->hw = snd_m3_playback;
        snd_pcm_set_sync(subs);

        return 0;
}

static int
snd_m3_playback_close(snd_pcm_substream_t *subs)
{
        m3_t *chip = snd_pcm_substream_chip(subs);

        snd_m3_substream_close(chip, subs);
        return 0;
}

static int
snd_m3_capture_open(snd_pcm_substream_t *subs)
{
        m3_t *chip = snd_pcm_substream_chip(subs);
        snd_pcm_runtime_t *runtime = subs->runtime;
        int err;

        if ((err = snd_m3_substream_open(chip, subs)) < 0)
                return err;

        runtime->hw = snd_m3_capture;
        snd_pcm_set_sync(subs);

        return 0;
}

static int
snd_m3_capture_close(snd_pcm_substream_t *subs)
{
        m3_t *chip = snd_pcm_substream_chip(subs);

        snd_m3_substream_close(chip, subs);
        return 0;
}

/*
 * create pcm instance
 */

static snd_pcm_ops_t snd_m3_playback_ops = {
        .open =         snd_m3_playback_open,
        .close =        snd_m3_playback_close,
        .ioctl =        snd_pcm_lib_ioctl,
        .hw_params =    snd_m3_pcm_hw_params,
        .hw_free =      snd_m3_pcm_hw_free,
        .prepare =      snd_m3_pcm_prepare,
        .trigger =      snd_m3_pcm_trigger,
        .pointer =      snd_m3_pcm_pointer,
};

static snd_pcm_ops_t snd_m3_capture_ops = {
        .open =         snd_m3_capture_open,
        .close =        snd_m3_capture_close,
        .ioctl =        snd_pcm_lib_ioctl,
        .hw_params =    snd_m3_pcm_hw_params,
        .hw_free =      snd_m3_pcm_hw_free,
        .prepare =      snd_m3_pcm_prepare,
        .trigger =      snd_m3_pcm_trigger,
        .pointer =      snd_m3_pcm_pointer,
};

static int __devinit
snd_m3_pcm(m3_t * chip, int device)
{
        snd_pcm_t *pcm;
        int err;

        err = snd_pcm_new(chip->card, chip->card->driver, device,
                          MAX_PLAYBACKS, MAX_CAPTURES, &pcm);
        if (err < 0)
                return err;

        snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_m3_playback_ops);
        snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_m3_capture_ops);

        pcm->private_data = chip;
        pcm->info_flags = 0;
        strcpy(pcm->name, chip->card->driver);
        chip->pcm = pcm;
        
        snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
                                              snd_dma_pci_data(chip->pci), 64*1024, 64*1024);

        return 0;
}


/*
 * ac97 interface
 */

/*
 * Wait for the ac97 serial bus to be free.
 * return nonzero if the bus is still busy.
 */
static int snd_m3_ac97_wait(m3_t *chip)
{
        int i = 10000;

        do {
                if (! (snd_m3_inb(chip, 0x30) & 1))
                        return 0;
        } while (i-- > 0);

        snd_printk("ac97 serial bus busy\n");
        return 1;
}

static unsigned short
snd_m3_ac97_read(ac97_t *ac97, unsigned short reg)
{
        m3_t *chip = ac97->private_data;

        if (snd_m3_ac97_wait(chip))
                return 0xffff;
        snd_m3_outb(chip, 0x80 | (reg & 0x7f), CODEC_COMMAND);
        if (snd_m3_ac97_wait(chip))
                return 0xffff;
        return snd_m3_inw(chip, CODEC_DATA);
}

static void
snd_m3_ac97_write(ac97_t *ac97, unsigned short reg, unsigned short val)
{
        m3_t *chip = ac97->private_data;

        if (snd_m3_ac97_wait(chip))
                return;
        snd_m3_outw(chip, val, CODEC_DATA);
        snd_m3_outb(chip, reg & 0x7f, CODEC_COMMAND);
}


static void snd_m3_remote_codec_config(int io, int isremote)
{
        isremote = isremote ? 1 : 0;

        outw((inw(io + RING_BUS_CTRL_B) & ~SECOND_CODEC_ID_MASK) | isremote,
             io + RING_BUS_CTRL_B);
        outw((inw(io + SDO_OUT_DEST_CTRL) & ~COMMAND_ADDR_OUT) | isremote,
             io + SDO_OUT_DEST_CTRL);
        outw((inw(io + SDO_IN_DEST_CTRL) & ~STATUS_ADDR_IN) | isremote,
             io + SDO_IN_DEST_CTRL);
}

/* 
 * hack, returns non zero on err 
 */
static int snd_m3_try_read_vendor(m3_t *chip)
{
        u16 ret;

        if (snd_m3_ac97_wait(chip))
                return 1;

        snd_m3_outb(chip, 0x80 | (AC97_VENDOR_ID1 & 0x7f), 0x30);

        if (snd_m3_ac97_wait(chip))
                return 1;

        ret = snd_m3_inw(chip, 0x32);

        return (ret == 0) || (ret == 0xffff);
}

static void snd_m3_ac97_reset(m3_t *chip)
{
        u16 dir;
        int delay1 = 0, delay2 = 0, i;
        int io = chip->iobase;

        if (chip->allegro_flag) {
                /*
                 * the onboard codec on the allegro seems 
                 * to want to wait a very long time before
                 * coming back to life 
                 */
                delay1 = 50;
                delay2 = 800;
        } else {
                /* maestro3 */
                delay1 = 20;
                delay2 = 500;
        }

        for (i = 0; i < 5; i++) {
                dir = inw(io + GPIO_DIRECTION);
                if (! chip->quirk || ! chip->quirk->irda_workaround)
                        dir |= 0x10; /* assuming pci bus master? */

                snd_m3_remote_codec_config(io, 0);

                outw(IO_SRAM_ENABLE, io + RING_BUS_CTRL_A);
                udelay(20);

                outw(dir & ~GPO_PRIMARY_AC97 , io + GPIO_DIRECTION);
                outw(~GPO_PRIMARY_AC97 , io + GPIO_MASK);
                outw(0, io + GPIO_DATA);
                outw(dir | GPO_PRIMARY_AC97, io + GPIO_DIRECTION);

                set_current_state(TASK_UNINTERRUPTIBLE);
                schedule_timeout((delay1 * HZ) / 1000);

                outw(GPO_PRIMARY_AC97, io + GPIO_DATA);
                udelay(5);
                /* ok, bring back the ac-link */
                outw(IO_SRAM_ENABLE | SERIAL_AC_LINK_ENABLE, io + RING_BUS_CTRL_A);
                outw(~0, io + GPIO_MASK);

                set_current_state(TASK_UNINTERRUPTIBLE);
                schedule_timeout((delay2 * HZ) / 1000);

                if (! snd_m3_try_read_vendor(chip))
                        break;

                delay1 += 10;
                delay2 += 100;

                snd_printd("maestro3: retrying codec reset with delays of %d and %d ms\n",
                           delay1, delay2);
        }

#if 0
        /* more gung-ho reset that doesn't
         * seem to work anywhere :)
         */
        tmp = inw(io + RING_BUS_CTRL_A);
        outw(RAC_SDFS_ENABLE|LAC_SDFS_ENABLE, io + RING_BUS_CTRL_A);
        big_mdelay(20);
        outw(tmp, io + RING_BUS_CTRL_A);
        big_mdelay(50);
#endif
}

static int __devinit snd_m3_mixer(m3_t *chip)
{
        ac97_bus_t *pbus;
        ac97_template_t ac97;
        int err;
        static ac97_bus_ops_t ops = {
                .write = snd_m3_ac97_write,
                .read = snd_m3_ac97_read,
        };

        if ((err = snd_ac97_bus(chip->card, 0, &ops, NULL, &pbus)) < 0)
                return err;
        
        memset(&ac97, 0, sizeof(ac97));
        ac97.private_data = chip;
        if ((err = snd_ac97_mixer(pbus, &ac97, &chip->ac97)) < 0)
                return err;

        /* seems ac97 PCM needs initialization.. hack hack.. */
        snd_ac97_write(chip->ac97, AC97_PCM, 0x8000 | (15 << 8) | 15);
        set_current_state(TASK_UNINTERRUPTIBLE);
        schedule_timeout(HZ / 10);
        snd_ac97_write(chip->ac97, AC97_PCM, 0);

        return 0;
}


/*
 * DSP Code images
 */

static u16 assp_kernel_image[] __devinitdata = {
    0x7980, 0x0030, 0x7980, 0x03B4, 0x7980, 0x03B4, 0x7980, 0x00FB, 0x7980, 0x00DD, 0x7980, 0x03B4, 
    0x7980, 0x0332, 0x7980, 0x0287, 0x7980, 0x03B4, 0x7980, 0x03B4, 0x7980, 0x03B4, 0x7980, 0x03B4, 
    0x7980, 0x031A, 0x7980, 0x03B4, 0x7980, 0x022F, 0x7980, 0x03B4, 0x7980, 0x03B4, 0x7980, 0x03B4, 
    0x7980, 0x03B4, 0x7980, 0x03B4, 0x7980, 0x0063, 0x7980, 0x006B, 0x7980, 0x03B4, 0x7980, 0x03B4, 
    0xBF80, 0x2C7C, 0x8806, 0x8804, 0xBE40, 0xBC20, 0xAE09, 0x1000, 0xAE0A, 0x0001, 0x6938, 0xEB08, 
    0x0053, 0x695A, 0xEB08, 0x00D6, 0x0009, 0x8B88, 0x6980, 0xE388, 0x0036, 0xBE30, 0xBC20, 0x6909, 
    0xB801, 0x9009, 0xBE41, 0xBE41, 0x6928, 0xEB88, 0x0078, 0xBE41, 0xBE40, 0x7980, 0x0038, 0xBE41, 
    0xBE41, 0x903A, 0x6938, 0xE308, 0x0056, 0x903A, 0xBE41, 0xBE40, 0xEF00, 0x903A, 0x6939, 0xE308, 

    0x005E, 0x903A, 0xEF00, 0x690B, 0x660C, 0xEF8C, 0x690A, 0x660C, 0x620B, 0x6609, 0xEF00, 0x6910, 
    0x660F, 0xEF04, 0xE388, 0x0075, 0x690E, 0x660F, 0x6210, 0x660D, 0xEF00, 0x690E, 0x660D, 0xEF00, 
    0xAE70, 0x0001, 0xBC20, 0xAE27, 0x0001, 0x6939, 0xEB08, 0x005D, 0x6926, 0xB801, 0x9026, 0x0026, 
    0x8B88, 0x6980, 0xE388, 0x00CB, 0x9028, 0x0D28, 0x4211, 0xE100, 0x007A, 0x4711, 0xE100, 0x00A0, 
    0x7A80, 0x0063, 0xB811, 0x660A, 0x6209, 0xE304, 0x007A, 0x0C0B, 0x4005, 0x100A, 0xBA01, 0x9012, 
    0x0C12, 0x4002, 0x7980, 0x00AF, 0x7A80, 0x006B, 0xBE02, 0x620E, 0x660D, 0xBA10, 0xE344, 0x007A, 
    0x0C10, 0x4005, 0x100E, 0xBA01, 0x9012, 0x0C12, 0x4002, 0x1003, 0xBA02, 0x9012, 0x0C12, 0x4000, 
    0x1003, 0xE388, 0x00BA, 0x1004, 0x7980, 0x00BC, 0x1004, 0xBA01, 0x9012, 0x0C12, 0x4001, 0x0C05, 
    0x4003, 0x0C06, 0x4004, 0x1011, 0xBFB0, 0x01FF, 0x9012, 0x0C12, 0x4006, 0xBC20, 0xEF00, 0xAE26, 
    0x1028, 0x6970, 0xBFD0, 0x0001, 0x9070, 0xE388, 0x007A, 0xAE28, 0x0000, 0xEF00, 0xAE70, 0x0300, 
    0x0C70, 0xB00C, 0xAE5A, 0x0000, 0xEF00, 0x7A80, 0x038A, 0x697F, 0xB801, 0x907F, 0x0056, 0x8B88, 
    0x0CA0, 0xB008, 0xAF71, 0xB000, 0x4E71, 0xE200, 0x00F3, 0xAE56, 0x1057, 0x0056, 0x0CA0, 0xB008, 
    0x8056, 0x7980, 0x03A1, 0x0810, 0xBFA0, 0x1059, 0xE304, 0x03A1, 0x8056, 0x7980, 0x03A1, 0x7A80, 
    0x038A, 0xBF01, 0xBE43, 0xBE59, 0x907C, 0x6937, 0xE388, 0x010D, 0xBA01, 0xE308, 0x010C, 0xAE71, 
    0x0004, 0x0C71, 0x5000, 0x6936, 0x9037, 0xBF0A, 0x109E, 0x8B8A, 0xAF80, 0x8014, 0x4C80, 0xBF0A, 
    0x0560, 0xF500, 0xBF0A, 0x0520, 0xB900, 0xBB17, 0x90A0, 0x6917, 0xE388, 0x0148, 0x0D17, 0xE100, 
    0x0127, 0xBF0C, 0x0578, 0xBF0D, 0x057C, 0x7980, 0x012B, 0xBF0C, 0x0538, 0xBF0D, 0x053C, 0x6900, 
    0xE308, 0x0135, 0x8B8C, 0xBE59, 0xBB07, 0x90A0, 0xBC20, 0x7980, 0x0157, 0x030C, 0x8B8B, 0xB903, 
    0x8809, 0xBEC6, 0x013E, 0x69AC, 0x90AB, 0x69AD, 0x90AB, 0x0813, 0x660A, 0xE344, 0x0144, 0x0309, 
    0x830C, 0xBC20, 0x7980, 0x0157, 0x6955, 0xE388, 0x0157, 0x7C38, 0xBF0B, 0x0578, 0xF500, 0xBF0B, 
    0x0538, 0xB907, 0x8809, 0xBEC6, 0x0156, 0x10AB, 0x90AA, 0x6974, 0xE388, 0x0163, 0xAE72, 0x0540, 
    0xF500, 0xAE72, 0x0500, 0xAE61, 0x103B, 0x7A80, 0x02F6, 0x6978, 0xE388, 0x0182, 0x8B8C, 0xBF0C, 
    0x0560, 0xE500, 0x7C40, 0x0814, 0xBA20, 0x8812, 0x733D, 0x7A80, 0x0380, 0x733E, 0x7A80, 0x0380, 
    0x8B8C, 0xBF0C, 0x056C, 0xE500, 0x7C40, 0x0814, 0xBA2C, 0x8812, 0x733F, 0x7A80, 0x0380, 0x7340, 
    0x7A80, 0x0380, 0x6975, 0xE388, 0x018E, 0xAE72, 0x0548, 0xF500, 0xAE72, 0x0508, 0xAE61, 0x1041, 
    0x7A80, 0x02F6, 0x6979, 0xE388, 0x01AD, 0x8B8C, 0xBF0C, 0x0560, 0xE500, 0x7C40, 0x0814, 0xBA18, 
    0x8812, 0x7343, 0x7A80, 0x0380, 0x7344, 0x7A80, 0x0380, 0x8B8C, 0xBF0C, 0x056C, 0xE500, 0x7C40, 
    0x0814, 0xBA24, 0x8812, 0x7345, 0x7A80, 0x0380, 0x7346, 0x7A80, 0x0380, 0x6976, 0xE388, 0x01B9, 
    0xAE72, 0x0558, 0xF500, 0xAE72, 0x0518, 0xAE61, 0x1047, 0x7A80, 0x02F6, 0x697A, 0xE388, 0x01D8, 
    0x8B8C, 0xBF0C, 0x0560, 0xE500, 0x7C40, 0x0814, 0xBA08, 0x8812, 0x7349, 0x7A80, 0x0380, 0x734A, 
    0x7A80, 0x0380, 0x8B8C, 0xBF0C, 0x056C, 0xE500, 0x7C40, 0x0814, 0xBA14, 0x8812, 0x734B, 0x7A80, 
    0x0380, 0x734C, 0x7A80, 0x0380, 0xBC21, 0xAE1C, 0x1090, 0x8B8A, 0xBF0A, 0x0560, 0xE500, 0x7C40, 
    0x0812, 0xB804, 0x8813, 0x8B8D, 0xBF0D, 0x056C, 0xE500, 0x7C40, 0x0815, 0xB804, 0x8811, 0x7A80, 
    0x034A, 0x8B8A, 0xBF0A, 0x0560, 0xE500, 0x7C40, 0x731F, 0xB903, 0x8809, 0xBEC6, 0x01F9, 0x548A, 
    0xBE03, 0x98A0, 0x7320, 0xB903, 0x8809, 0xBEC6, 0x0201, 0x548A, 0xBE03, 0x98A0, 0x1F20, 0x2F1F, 
    0x9826, 0xBC20, 0x6935, 0xE388, 0x03A1, 0x6933, 0xB801, 0x9033, 0xBFA0, 0x02EE, 0xE308, 0x03A1, 
    0x9033, 0xBF00, 0x6951, 0xE388, 0x021F, 0x7334, 0xBE80, 0x5760, 0xBE03, 0x9F7E, 0xBE59, 0x9034, 
    0x697E, 0x0D51, 0x9013, 0xBC20, 0x695C, 0xE388, 0x03A1, 0x735E, 0xBE80, 0x5760, 0xBE03, 0x9F7E, 
    0xBE59, 0x905E, 0x697E, 0x0D5C, 0x9013, 0x7980, 0x03A1, 0x7A80, 0x038A, 0xBF01, 0xBE43, 0x6977, 
    0xE388, 0x024E, 0xAE61, 0x104D, 0x0061, 0x8B88, 0x6980, 0xE388, 0x024E, 0x9071, 0x0D71, 0x000B, 
    0xAFA0, 0x8010, 0xAFA0, 0x8010, 0x0810, 0x660A, 0xE308, 0x0249, 0x0009, 0x0810, 0x660C, 0xE388, 
    0x024E, 0x800B, 0xBC20, 0x697B, 0xE388, 0x03A1, 0xBF0A, 0x109E, 0x8B8A, 0xAF80, 0x8014, 0x4C80, 
    0xE100, 0x0266, 0x697C, 0xBF90, 0x0560, 0x9072, 0x0372, 0x697C, 0xBF90, 0x0564, 0x9073, 0x0473, 
    0x7980, 0x0270, 0x697C, 0xBF90, 0x0520, 0x9072, 0x0372, 0x697C, 0xBF90, 0x0524, 0x9073, 0x0473, 
    0x697C, 0xB801, 0x907C, 0xBF0A, 0x10FD, 0x8B8A, 0xAF80, 0x8010, 0x734F, 0x548A, 0xBE03, 0x9880, 
    0xBC21, 0x7326, 0x548B, 0xBE03, 0x618B, 0x988C, 0xBE03, 0x6180, 0x9880, 0x7980, 0x03A1, 0x7A80, 
    0x038A, 0x0D28, 0x4711, 0xE100, 0x02BE, 0xAF12, 0x4006, 0x6912, 0xBFB0, 0x0C00, 0xE388, 0x02B6, 
    0xBFA0, 0x0800, 0xE388, 0x02B2, 0x6912, 0xBFB0, 0x0C00, 0xBFA0, 0x0400, 0xE388, 0x02A3, 0x6909, 
    0x900B, 0x7980, 0x02A5, 0xAF0B, 0x4005, 0x6901, 0x9005, 0x6902, 0x9006, 0x4311, 0xE100, 0x02ED, 
    0x6911, 0xBFC0, 0x2000, 0x9011, 0x7980, 0x02ED, 0x6909, 0x900B, 0x7980, 0x02B8, 0xAF0B, 0x4005, 
    0xAF05, 0x4003, 0xAF06, 0x4004, 0x7980, 0x02ED, 0xAF12, 0x4006, 0x6912, 0xBFB0, 0x0C00, 0xE388, 
    0x02E7, 0xBFA0, 0x0800, 0xE388, 0x02E3, 0x6912, 0xBFB0, 0x0C00, 0xBFA0, 0x0400, 0xE388, 0x02D4, 
    0x690D, 0x9010, 0x7980, 0x02D6, 0xAF10, 0x4005, 0x6901, 0x9005, 0x6902, 0x9006, 0x4311, 0xE100, 
    0x02ED, 0x6911, 0xBFC0, 0x2000, 0x9011, 0x7980, 0x02ED, 0x690D, 0x9010, 0x7980, 0x02E9, 0xAF10, 
    0x4005, 0xAF05, 0x4003, 0xAF06, 0x4004, 0xBC20, 0x6970, 0x9071, 0x7A80, 0x0078, 0x6971, 0x9070, 
    0x7980, 0x03A1, 0xBC20, 0x0361, 0x8B8B, 0x6980, 0xEF88, 0x0272, 0x0372, 0x7804, 0x9071, 0x0D71, 
    0x8B8A, 0x000B, 0xB903, 0x8809, 0xBEC6, 0x0309, 0x69A8, 0x90AB, 0x69A8, 0x90AA, 0x0810, 0x660A, 
    0xE344, 0x030F, 0x0009, 0x0810, 0x660C, 0xE388, 0x0314, 0x800B, 0xBC20, 0x6961, 0xB801, 0x9061, 
    0x7980, 0x02F7, 0x7A80, 0x038A, 0x5D35, 0x0001, 0x6934, 0xB801, 0x9034, 0xBF0A, 0x109E, 0x8B8A, 
    0xAF80, 0x8014, 0x4880, 0xAE72, 0x0550, 0xF500, 0xAE72, 0x0510, 0xAE61, 0x1051, 0x7A80, 0x02F6, 
    0x7980, 0x03A1, 0x7A80, 0x038A, 0x5D35, 0x0002, 0x695E, 0xB801, 0x905E, 0xBF0A, 0x109E, 0x8B8A, 
    0xAF80, 0x8014, 0x4780, 0xAE72, 0x0558, 0xF500, 0xAE72, 0x0518, 0xAE61, 0x105C, 0x7A80, 0x02F6, 
    0x7980, 0x03A1, 0x001C, 0x8B88, 0x6980, 0xEF88, 0x901D, 0x0D1D, 0x100F, 0x6610, 0xE38C, 0x0358, 
    0x690E, 0x6610, 0x620F, 0x660D, 0xBA0F, 0xE301, 0x037A, 0x0410, 0x8B8A, 0xB903, 0x8809, 0xBEC6, 
    0x036C, 0x6A8C, 0x61AA, 0x98AB, 0x6A8C, 0x61AB, 0x98AD, 0x6A8C, 0x61AD, 0x98A9, 0x6A8C, 0x61A9, 
    0x98AA, 0x7C04, 0x8B8B, 0x7C04, 0x8B8D, 0x7C04, 0x8B89, 0x7C04, 0x0814, 0x660E, 0xE308, 0x0379, 
    0x040D, 0x8410, 0xBC21, 0x691C, 0xB801, 0x901C, 0x7980, 0x034A, 0xB903, 0x8809, 0x8B8A, 0xBEC6, 
    0x0388, 0x54AC, 0xBE03, 0x618C, 0x98AA, 0xEF00, 0xBC20, 0xBE46, 0x0809, 0x906B, 0x080A, 0x906C, 
    0x080B, 0x906D, 0x081A, 0x9062, 0x081B, 0x9063, 0x081E, 0x9064, 0xBE59, 0x881E, 0x8065, 0x8166, 
    0x8267, 0x8368, 0x8469, 0x856A, 0xEF00, 0xBC20, 0x696B, 0x8809, 0x696C, 0x880A, 0x696D, 0x880B, 
    0x6962, 0x881A, 0x6963, 0x881B, 0x6964, 0x881E, 0x0065, 0x0166, 0x0267, 0x0368, 0x0469, 0x056A, 
    0xBE3A, 
};

/*
 * Mini sample rate converter code image
 * that is to be loaded at 0x400 on the DSP.
 */
static u16 assp_minisrc_image[] __devinitdata = {

    0xBF80, 0x101E, 0x906E, 0x006E, 0x8B88, 0x6980, 0xEF88, 0x906F, 0x0D6F, 0x6900, 0xEB08, 0x0412, 
    0xBC20, 0x696E, 0xB801, 0x906E, 0x7980, 0x0403, 0xB90E, 0x8807, 0xBE43, 0xBF01, 0xBE47, 0xBE41, 
    0x7A80, 0x002A, 0xBE40, 0x3029, 0xEFCC, 0xBE41, 0x7A80, 0x0028, 0xBE40, 0x3028, 0xEFCC, 0x6907, 
    0xE308, 0x042A, 0x6909, 0x902C, 0x7980, 0x042C, 0x690D, 0x902C, 0x1009, 0x881A, 0x100A, 0xBA01, 
    0x881B, 0x100D, 0x881C, 0x100E, 0xBA01, 0x881D, 0xBF80, 0x00ED, 0x881E, 0x050C, 0x0124, 0xB904, 
    0x9027, 0x6918, 0xE308, 0x04B3, 0x902D, 0x6913, 0xBFA0, 0x7598, 0xF704, 0xAE2D, 0x00FF, 0x8B8D, 
    0x6919, 0xE308, 0x0463, 0x691A, 0xE308, 0x0456, 0xB907, 0x8809, 0xBEC6, 0x0453, 0x10A9, 0x90AD, 
    0x7980, 0x047C, 0xB903, 0x8809, 0xBEC6, 0x0460, 0x1889, 0x6C22, 0x90AD, 0x10A9, 0x6E23, 0x6C22, 
    0x90AD, 0x7980, 0x047C, 0x101A, 0xE308, 0x046F, 0xB903, 0x8809, 0xBEC6, 0x046C, 0x10A9, 0x90A0, 
    0x90AD, 0x7980, 0x047C, 0xB901, 0x8809, 0xBEC6, 0x047B, 0x1889, 0x6C22, 0x90A0, 0x90AD, 0x10A9, 
    0x6E23, 0x6C22, 0x90A0, 0x90AD, 0x692D, 0xE308, 0x049C, 0x0124, 0xB703, 0xB902, 0x8818, 0x8B89, 
    0x022C, 0x108A, 0x7C04, 0x90A0, 0x692B, 0x881F, 0x7E80, 0x055B, 0x692A, 0x8809, 0x8B89, 0x99A0, 
    0x108A, 0x90A0, 0x692B, 0x881F, 0x7E80, 0x055B, 0x692A, 0x8809, 0x8B89, 0x99AF, 0x7B99, 0x0484, 
    0x0124, 0x060F, 0x101B, 0x2013, 0x901B, 0xBFA0, 0x7FFF, 0xE344, 0x04AC, 0x901B, 0x8B89, 0x7A80, 
    0x051A, 0x6927, 0xBA01, 0x9027, 0x7A80, 0x0523, 0x6927, 0xE308, 0x049E, 0x7980, 0x050F, 0x0624, 
    0x1026, 0x2013, 0x9026, 0xBFA0, 0x7FFF, 0xE304, 0x04C0, 0x8B8D, 0x7A80, 0x051A, 0x7980, 0x04B4, 
    0x9026, 0x1013, 0x3026, 0x901B, 0x8B8D, 0x7A80, 0x051A, 0x7A80, 0x0523, 0x1027, 0xBA01, 0x9027, 
    0xE308, 0x04B4, 0x0124, 0x060F, 0x8B89, 0x691A, 0xE308, 0x04EA, 0x6919, 0xE388, 0x04E0, 0xB903, 
    0x8809, 0xBEC6, 0x04DD, 0x1FA0, 0x2FAE, 0x98A9, 0x7980, 0x050F, 0xB901, 0x8818, 0xB907, 0x8809, 
    0xBEC6, 0x04E7, 0x10EE, 0x90A9, 0x7980, 0x050F, 0x6919, 0xE308, 0x04FE, 0xB903, 0x8809, 0xBE46, 
    0xBEC6, 0x04FA, 0x17A0, 0xBE1E, 0x1FAE, 0xBFBF, 0xFF00, 0xBE13, 0xBFDF, 0x8080, 0x99A9, 0xBE47, 
    0x7980, 0x050F, 0xB901, 0x8809, 0xBEC6, 0x050E, 0x16A0, 0x26A0, 0xBFB7, 0xFF00, 0xBE1E, 0x1EA0, 
    0x2EAE, 0xBFBF, 0xFF00, 0xBE13, 0xBFDF, 0x8080, 0x99A9, 0x850C, 0x860F, 0x6907, 0xE388, 0x0516, 
    0x0D07, 0x8510, 0xBE59, 0x881E, 0xBE4A, 0xEF00, 0x101E, 0x901C, 0x101F, 0x901D, 0x10A0, 0x901E, 
    0x10A0, 0x901F, 0xEF00, 0x101E, 0x301C, 0x9020, 0x731B, 0x5420, 0xBE03, 0x9825, 0x1025, 0x201C, 
    0x9025, 0x7325, 0x5414, 0xBE03, 0x8B8E, 0x9880, 0x692F, 0xE388, 0x0539, 0xBE59, 0xBB07, 0x6180, 
    0x9880, 0x8BA0, 0x101F, 0x301D, 0x9021, 0x731B, 0x5421, 0xBE03, 0x982E, 0x102E, 0x201D, 0x902E, 
    0x732E, 0x5415, 0xBE03, 0x9880, 0x692F, 0xE388, 0x054F, 0xBE59, 0xBB07, 0x6180, 0x9880, 0x8BA0, 
    0x6918, 0xEF08, 0x7325, 0x5416, 0xBE03, 0x98A0, 0x732E, 0x5417, 0xBE03, 0x98A0, 0xEF00, 0x8BA0, 
    0xBEC6, 0x056B, 0xBE59, 0xBB04, 0xAA90, 0xBE04, 0xBE1E, 0x99E0, 0x8BE0, 0x69A0, 0x90D0, 0x69A0, 
    0x90D0, 0x081F, 0xB805, 0x881F, 0x8B90, 0x69A0, 0x90D0, 0x69A0, 0x9090, 0x8BD0, 0x8BD8, 0xBE1F, 
    0xEF00, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 
    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 
};


/*
 * initialize ASSP
 */

#define MINISRC_LPF_LEN 10
static u16 minisrc_lpf[MINISRC_LPF_LEN] __devinitdata = {
        0X0743, 0X1104, 0X0A4C, 0XF88D, 0X242C,
        0X1023, 0X1AA9, 0X0B60, 0XEFDD, 0X186F
};

static void __devinit snd_m3_assp_init(m3_t *chip)
{
        unsigned int i;

        /* zero kernel data */
        for (i = 0; i < (REV_B_DATA_MEMORY_UNIT_LENGTH * NUM_UNITS_KERNEL_DATA) / 2; i++)
                snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA, 
                                  KDATA_BASE_ADDR + i, 0);

        /* zero mixer data? */
        for (i = 0; i < (REV_B_DATA_MEMORY_UNIT_LENGTH * NUM_UNITS_KERNEL_DATA) / 2; i++)
                snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA,
                                  KDATA_BASE_ADDR2 + i, 0);

        /* init dma pointer */
        snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA,
                          KDATA_CURRENT_DMA,
                          KDATA_DMA_XFER0);

        /* write kernel into code memory.. */
        for (i = 0 ; i < ARRAY_SIZE(assp_kernel_image); i++) {
                snd_m3_assp_write(chip, MEMTYPE_INTERNAL_CODE, 
                                  REV_B_CODE_MEMORY_BEGIN + i, 
                                  assp_kernel_image[i]);
        }

        /*
         * We only have this one client and we know that 0x400
         * is free in our kernel's mem map, so lets just
         * drop it there.  It seems that the minisrc doesn't
         * need vectors, so we won't bother with them..
         */
        for (i = 0; i < ARRAY_SIZE(assp_minisrc_image); i++) {
                snd_m3_assp_write(chip, MEMTYPE_INTERNAL_CODE, 
                                  0x400 + i, 
                                  assp_minisrc_image[i]);
        }

        /*
         * write the coefficients for the low pass filter?
         */
        for (i = 0; i < MINISRC_LPF_LEN ; i++) {
                snd_m3_assp_write(chip, MEMTYPE_INTERNAL_CODE,
                                  0x400 + MINISRC_COEF_LOC + i,
                                  minisrc_lpf[i]);
        }

        snd_m3_assp_write(chip, MEMTYPE_INTERNAL_CODE,
                          0x400 + MINISRC_COEF_LOC + MINISRC_LPF_LEN,
                          0x8000);

        /*
         * the minisrc is the only thing on
         * our task list..
         */
        snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA, 
                          KDATA_TASK0,
                          0x400);

        /*
         * init the mixer number..
         */

        snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA,
                          KDATA_MIXER_TASK_NUMBER,0);

        /*
         * EXTREME KERNEL MASTER VOLUME
         */
        snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA,
                          KDATA_DAC_LEFT_VOLUME, ARB_VOLUME);
        snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA,
                          KDATA_DAC_RIGHT_VOLUME, ARB_VOLUME);

        chip->mixer_list.curlen = 0;
        chip->mixer_list.mem_addr = KDATA_MIXER_XFER0;
        chip->mixer_list.max = MAX_VIRTUAL_MIXER_CHANNELS;
        chip->adc1_list.curlen = 0;
        chip->adc1_list.mem_addr = KDATA_ADC1_XFER0;
        chip->adc1_list.max = MAX_VIRTUAL_ADC1_CHANNELS;
        chip->dma_list.curlen = 0;
        chip->dma_list.mem_addr = KDATA_DMA_XFER0;
        chip->dma_list.max = MAX_VIRTUAL_DMA_CHANNELS;
        chip->msrc_list.curlen = 0;
        chip->msrc_list.mem_addr = KDATA_INSTANCE0_MINISRC;
        chip->msrc_list.max = MAX_INSTANCE_MINISRC;
}


static int __devinit snd_m3_assp_client_init(m3_t *chip, m3_dma_t *s, int index)
{
        int data_bytes = 2 * ( MINISRC_TMP_BUFFER_SIZE / 2 + 
                               MINISRC_IN_BUFFER_SIZE / 2 +
                               1 + MINISRC_OUT_BUFFER_SIZE / 2 + 1 );
        int address, i;

        /*
         * the revb memory map has 0x1100 through 0x1c00
         * free.  
         */

        /*
         * align instance address to 256 bytes so that it's
         * shifted list address is aligned.
         * list address = (mem address >> 1) >> 7;
         */
        data_bytes = (data_bytes + 255) & ~255;
        address = 0x1100 + ((data_bytes/2) * index);

        if ((address + (data_bytes/2)) >= 0x1c00) {
                snd_printk("no memory for %d bytes at ind %d (addr 0x%x)\n",
                           data_bytes, index, address);
                return -ENOMEM;
        }

        s->number = index;
        s->inst.code = 0x400;
        s->inst.data = address;

        for (i = data_bytes / 2; i > 0; address++, i--) {
                snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA,
                                  address, 0);
        }

        return 0;
}


/* 
 * this works for the reference board, have to find
 * out about others
 *
 * this needs more magic for 4 speaker, but..
 */
static void
snd_m3_amp_enable(m3_t *chip, int enable)
{
        int io = chip->iobase;
        u16 gpo, polarity;

        if (! chip->external_amp)
                return;

        polarity = enable ? 0 : 1;
        polarity = polarity << chip->amp_gpio;
        gpo = 1 << chip->amp_gpio;

        outw(~gpo, io + GPIO_MASK);

        outw(inw(io + GPIO_DIRECTION) | gpo,
             io + GPIO_DIRECTION);

        outw((GPO_SECONDARY_AC97 | GPO_PRIMARY_AC97 | polarity),
             io + GPIO_DATA);

        outw(0xffff, io + GPIO_MASK);
}

static int
snd_m3_chip_init(m3_t *chip)
{
        struct pci_dev *pcidev = chip->pci;
        u32 n;
        u16 w;
        u8 t; /* makes as much sense as 'n', no? */

        pci_read_config_word(pcidev, PCI_LEGACY_AUDIO_CTRL, &w);
        w &= ~(SOUND_BLASTER_ENABLE|FM_SYNTHESIS_ENABLE|
               MPU401_IO_ENABLE|MPU401_IRQ_ENABLE|ALIAS_10BIT_IO|
               DISABLE_LEGACY);
        pci_write_config_word(pcidev, PCI_LEGACY_AUDIO_CTRL, w);

        pci_read_config_dword(pcidev, PCI_ALLEGRO_CONFIG, &n);
        n &= REDUCED_DEBOUNCE;
        n |= PM_CTRL_ENABLE | CLK_DIV_BY_49 | USE_PCI_TIMING;
        pci_write_config_dword(pcidev, PCI_ALLEGRO_CONFIG, n);

        outb(RESET_ASSP, chip->iobase + ASSP_CONTROL_B);
        pci_read_config_dword(pcidev, PCI_ALLEGRO_CONFIG, &n);
        n &= ~INT_CLK_SELECT;
        if (!chip->allegro_flag) {
                n &= ~INT_CLK_MULT_ENABLE; 
                n |= INT_CLK_SRC_NOT_PCI;
        }
        n &=  ~( CLK_MULT_MODE_SELECT | CLK_MULT_MODE_SELECT_2 );
        pci_write_config_dword(pcidev, PCI_ALLEGRO_CONFIG, n);

        if (chip->allegro_flag) {
                pci_read_config_dword(pcidev, PCI_USER_CONFIG, &n);
                n |= IN_CLK_12MHZ_SELECT;
                pci_write_config_dword(pcidev, PCI_USER_CONFIG, n);
        }

        t = inb(chip->iobase + ASSP_CONTROL_A);
        t &= ~( DSP_CLK_36MHZ_SELECT  | ASSP_CLK_49MHZ_SELECT);
        t |= ASSP_CLK_49MHZ_SELECT;
        t |= ASSP_0_WS_ENABLE; 
        outb(t, chip->iobase + ASSP_CONTROL_A);

        outb(RUN_ASSP, chip->iobase + ASSP_CONTROL_B); 

        return 0;
} 

static void
snd_m3_enable_ints(m3_t *chip)
{
        unsigned long io = chip->iobase;

        /* TODO: MPU401 not supported yet */
        outw(ASSP_INT_ENABLE /*| MPU401_INT_ENABLE*/, io + HOST_INT_CTRL);
        outb(inb(io + ASSP_CONTROL_C) | ASSP_HOST_INT_ENABLE,
             io + ASSP_CONTROL_C);
}


/*
 */

static int snd_m3_free(m3_t *chip)
{
        m3_dma_t *s;
        int i;

        if (chip->substreams) {
                spin_lock_irq(&chip->reg_lock);
                for (i = 0; i < chip->num_substreams; i++) {
                        s = &chip->substreams[i];
                        /* check surviving pcms; this should not happen though.. */
                        if (s->substream && s->running)
                                snd_m3_pcm_stop(chip, s, s->substream);
                }
                spin_unlock_irq(&chip->reg_lock);
                kfree(chip->substreams);
        }
        if (chip->iobase) {
                snd_m3_outw(chip, HOST_INT_CTRL, 0); /* disable ints */
        }

#ifdef CONFIG_PM
        vfree(chip->suspend_mem);
#endif

        if (chip->irq >= 0) {
                synchronize_irq(chip->irq);
                free_irq(chip->irq, (void *)chip);
        }

        if (chip->iobase)
                pci_release_regions(chip->pci);

        pci_disable_device(chip->pci);
        kfree(chip);
        return 0;
}


/*
 * APM support
 */
#ifdef CONFIG_PM
static int m3_suspend(snd_card_t *card, unsigned int state)
{
        m3_t *chip = card->pm_private_data;
        int i, index;

        if (chip->suspend_mem == NULL)
                return 0;

        snd_pcm_suspend_all(chip->pcm);
        snd_ac97_suspend(chip->ac97);

        big_mdelay(10); /* give the assp a chance to idle.. */

        snd_m3_assp_halt(chip);

        /* save dsp image */
        index = 0;
        for (i = REV_B_CODE_MEMORY_BEGIN; i <= REV_B_CODE_MEMORY_END; i++)
                chip->suspend_mem[index++] = 
                        snd_m3_assp_read(chip, MEMTYPE_INTERNAL_CODE, i);
        for (i = REV_B_DATA_MEMORY_BEGIN ; i <= REV_B_DATA_MEMORY_END; i++)
                chip->suspend_mem[index++] = 
                        snd_m3_assp_read(chip, MEMTYPE_INTERNAL_DATA, i);

        /* power down apci registers */
        snd_m3_outw(chip, 0xffff, 0x54);
        snd_m3_outw(chip, 0xffff, 0x56);

        pci_disable_device(chip->pci);
        return 0;
}

static int m3_resume(snd_card_t *card, unsigned int state)
{
        m3_t *chip = card->pm_private_data;
        int i, index;

        if (chip->suspend_mem == NULL)
                return 0;

        pci_enable_device(chip->pci);
        pci_set_master(chip->pci);

        /* first lets just bring everything back. .*/
        snd_m3_outw(chip, 0, 0x54);
        snd_m3_outw(chip, 0, 0x56);

        snd_m3_chip_init(chip);
        snd_m3_assp_halt(chip);
        snd_m3_ac97_reset(chip);

        /* restore dsp image */
        index = 0;
        for (i = REV_B_CODE_MEMORY_BEGIN; i <= REV_B_CODE_MEMORY_END; i++)
                snd_m3_assp_write(chip, MEMTYPE_INTERNAL_CODE, i, 
                                  chip->suspend_mem[index++]);
        for (i = REV_B_DATA_MEMORY_BEGIN ; i <= REV_B_DATA_MEMORY_END; i++)
                snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA, i, 
                                  chip->suspend_mem[index++]);

        /* tell the dma engine to restart itself */
        snd_m3_assp_write(chip, MEMTYPE_INTERNAL_DATA, 
                          KDATA_DMA_ACTIVE, 0);

        /* restore ac97 registers */
        snd_ac97_resume(chip->ac97);

        snd_m3_assp_continue(chip);
        snd_m3_enable_ints(chip);
        snd_m3_amp_enable(chip, 1);

        return 0;
}
#endif /* CONFIG_PM */


/*
 */

static int snd_m3_dev_free(snd_device_t *device)
{
        m3_t *chip = device->device_data;
        return snd_m3_free(chip);
}

static int __devinit
snd_m3_create(snd_card_t *card, struct pci_dev *pci,
              int enable_amp,
              int amp_gpio,
              m3_t **chip_ret)
{
        m3_t *chip;
        int i, err;
        struct m3_quirk *quirk;
        u16 subsystem_vendor, subsystem_device;
        static snd_device_ops_t ops = {
                .dev_free =     snd_m3_dev_free,
        };

        *chip_ret = NULL;

        if (pci_enable_device(pci))
                return -EIO;

        /* check, if we can restrict PCI DMA transfers to 28 bits */
        if (pci_set_dma_mask(pci, 0x0fffffff) < 0 ||
            pci_set_consistent_dma_mask(pci, 0x0fffffff) < 0) {
                snd_printk("architecture does not support 28bit PCI busmaster DMA\n");
                pci_disable_device(pci);
                return -ENXIO;
        }

        chip = kcalloc(1, sizeof(*chip), GFP_KERNEL);
        if (chip == NULL) {
                pci_disable_device(pci);
                return -ENOMEM;
        }

        spin_lock_init(&chip->reg_lock);
        switch (pci->device) {
        case PCI_DEVICE_ID_ESS_ALLEGRO:
        case PCI_DEVICE_ID_ESS_ALLEGRO_1:
        case PCI_DEVICE_ID_ESS_CANYON3D_2LE:
        case PCI_DEVICE_ID_ESS_CANYON3D_2:
                chip->allegro_flag = 1;
                break;
        }

        chip->card = card;
        chip->pci = pci;
        chip->irq = -1;

        pci_read_config_word(pci, PCI_SUBSYSTEM_VENDOR_ID, &subsystem_vendor);
        pci_read_config_word(pci, PCI_SUBSYSTEM_ID, &subsystem_device);

        for (quirk = m3_quirk_list; quirk->vendor; quirk++) {
                if (subsystem_vendor == quirk->vendor &&
                    subsystem_device == quirk->device) {
                        printk(KERN_INFO "maestro3: enabled hack for '%s'\n", quirk->name);
                        chip->quirk = quirk;
                        break;
                }
        }

        chip->external_amp = enable_amp;
        if (amp_gpio >= 0 && amp_gpio <= 0x0f)
                chip->amp_gpio = amp_gpio;
        else if (chip->quirk && chip->quirk->amp_gpio >= 0)
                chip->amp_gpio = chip->quirk->amp_gpio;
        else if (chip->allegro_flag)
                chip->amp_gpio = GPO_EXT_AMP_ALLEGRO;
        else /* presumably this is for all 'maestro3's.. */
                chip->amp_gpio = GPO_EXT_AMP_M3;

        chip->num_substreams = NR_DSPS;
        chip->substreams = kmalloc(sizeof(m3_dma_t) * chip->num_substreams, GFP_KERNEL);
        if (chip->substreams == NULL) {
                kfree(chip);
                pci_disable_device(pci);
                return -ENOMEM;
        }
        memset(chip->substreams, 0, sizeof(m3_dma_t) * chip->num_substreams);

        if ((err = pci_request_regions(pci, card->driver)) < 0) {
                snd_m3_free(chip);
                return err;
        }
        chip->iobase = pci_resource_start(pci, 0);
        
        /* just to be sure */
        pci_set_master(pci);

        snd_m3_chip_init(chip);
        snd_m3_assp_halt(chip);

        snd_m3_ac97_reset(chip);

        snd_m3_assp_init(chip);
        snd_m3_amp_enable(chip, 1);

        if (request_irq(pci->irq, snd_m3_interrupt, SA_INTERRUPT|SA_SHIRQ,
                        card->driver, (void *)chip)) {
                snd_printk("unable to grab IRQ %d\n", pci->irq);
                snd_m3_free(chip);
                return -ENOMEM;
        }
        chip->irq = pci->irq;

#ifdef CONFIG_PM
        chip->suspend_mem = vmalloc(sizeof(u16) * (REV_B_CODE_MEMORY_LENGTH + REV_B_DATA_MEMORY_LENGTH));
        if (chip->suspend_mem == NULL)
                snd_printk(KERN_WARNING "can't allocate apm buffer\n");
        else
                snd_card_set_pm_callback(card, m3_suspend, m3_resume, chip);
#endif

        if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
                snd_m3_free(chip);
                return err;
        }

        if ((err = snd_m3_mixer(chip)) < 0)
                return err;

        for (i = 0; i < chip->num_substreams; i++) {
                m3_dma_t *s = &chip->substreams[i];
                s->chip = chip;
                if ((err = snd_m3_assp_client_init(chip, s, i)) < 0)
                        return err;
        }

        if ((err = snd_m3_pcm(chip, 0)) < 0)
                return err;
    
        snd_m3_enable_ints(chip);
        snd_m3_assp_continue(chip);

        snd_card_set_dev(card, &pci->dev);

        *chip_ret = chip;

        return 0; 
}

/*
 */
static int __devinit
snd_m3_probe(struct pci_dev *pci, const struct pci_device_id *pci_id)
{
        static int dev;
        snd_card_t *card;
        m3_t *chip;
        int err;

        /* don't pick up modems */
        if (((pci->class >> 8) & 0xffff) != PCI_CLASS_MULTIMEDIA_AUDIO)
                return -ENODEV;

        if (dev >= SNDRV_CARDS)
                return -ENODEV;
        if (!enable[dev]) {
                dev++;
                return -ENOENT;
        }

        card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
        if (card == NULL)
                return -ENOMEM;

        switch (pci->device) {
        case PCI_DEVICE_ID_ESS_ALLEGRO:
        case PCI_DEVICE_ID_ESS_ALLEGRO_1:
                strcpy(card->driver, "Allegro");
                break;
        case PCI_DEVICE_ID_ESS_CANYON3D_2LE:
        case PCI_DEVICE_ID_ESS_CANYON3D_2:
                strcpy(card->driver, "Canyon3D-2");
                break;
        default:
                strcpy(card->driver, "Maestro3");
                break;
        }

        if ((err = snd_m3_create(card, pci,
                                 external_amp[dev],
                                 amp_gpio[dev],
                                 &chip)) < 0) {
                snd_card_free(card);
                return err;
        }

        sprintf(card->shortname, "ESS %s PCI", card->driver);
        sprintf(card->longname, "%s at 0x%lx, irq %d",
                card->shortname, chip->iobase, chip->irq);

        if ((err = snd_card_register(card)) < 0) {
                snd_card_free(card);
                return err;
        }

#if 0 /* TODO: not supported yet */
        /* TODO enable midi irq and i/o */
        err = snd_mpu401_uart_new(chip->card, 0, MPU401_HW_MPU401,
                                  chip->iobase + MPU401_DATA_PORT, 1,
                                  chip->irq, 0, &chip->rmidi);
        if (err < 0)
                printk(KERN_WARNING "maestro3: no midi support.\n");
#endif

        pci_set_drvdata(pci, card);
        dev++;
        return 0;
}

static void __devexit snd_m3_remove(struct pci_dev *pci)
{
        snd_card_free(pci_get_drvdata(pci));
        pci_set_drvdata(pci, NULL);
}

static struct pci_driver driver = {
        .name = "Maestro3",
        .id_table = snd_m3_ids,
        .probe = snd_m3_probe,
        .remove = __devexit_p(snd_m3_remove),
        SND_PCI_PM_CALLBACKS
};
        
static int __init alsa_card_m3_init(void)
{
        return pci_module_init(&driver);
}

static void __exit alsa_card_m3_exit(void)
{
        pci_unregister_driver(&driver);
}

module_init(alsa_card_m3_init)
module_exit(alsa_card_m3_exit)