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 *  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
 *  GNU Library 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.
#ifndef __SOUND_AU88X0_H
#define __SOUND_AU88X0_H

#ifdef __KERNEL__
#include <sound/driver.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <asm/io.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/rawmidi.h>
#include <sound/mpu401.h>
#include <sound/hwdep.h>
#include <sound/ac97_codec.h>


#ifndef CHIP_AU8820
#include "au88x0_eq.h"
#include "au88x0_a3d.h"
#ifndef CHIP_AU8810
#include "au88x0_wt.h"

#define     VORTEX_DMA_MASK   0xffffffff

#define     hwread(x,y) readl((x)+((y)>>2))
#define     hwwrite(x,y,z) writel((z),(x)+((y)>>2))

/* Vortex MPU401 defines. */
#define     MIDI_CLOCK_DIV          0x61
/* Standart MPU401 defines. */
#define     MPU401_RESET            0xff
#define     MPU401_ENTER_UART 0x3f
#define     MPU401_ACK        0xfe

// Get src register value to convert from x to y.
#define     SRC_RATIO(x,y)          ((((x<<15)/y) + 1)/2)

/* FIFO software state constants. */
#define FIFO_STOP 0
#define FIFO_START 1
#define FIFO_PAUSE 2

/* IRQ flags */
#define IRQ_ERR_MASK    0x00ff
#define IRQ_FATAL 0x0001
#define IRQ_PARITY      0x0002
#define IRQ_REG         0x0004
#define IRQ_FIFO  0x0008
#define IRQ_DMA         0x0010
#define IRQ_PCMOUT      0x0020      /* PCM OUT page crossing */
#define IRQ_TIMER 0x1000
#define IRQ_MIDI  0x2000
#define IRQ_MODEM 0x4000

/* ADB Resource */
#define VORTEX_RESOURCE_DMA   0x00000000
#define VORTEX_RESOURCE_SRC   0x00000001
#define VORTEX_RESOURCE_MIXIN 0x00000002
#define VORTEX_RESOURCE_MIXOUT      0x00000003
#define VORTEX_RESOURCE_A3D   0x00000004
#define VORTEX_RESOURCE_LAST  0x00000005

/* Check for SDAC bit in "Extended audio ID" AC97 register */
//#define VORTEX_IS_QUAD(x) (((x)->codec == NULL) ?  0 : ((x)->codec->ext_id&0x80))
#define VORTEX_IS_QUAD(x) ((x)->isquad)
/* Check if chip has bug. */
#define IS_BAD_CHIP(x) (\
      (x->rev == 0xfe && x->device == PCI_DEVICE_ID_AUREAL_VORTEX_2) || \
      (x->rev == 0xfe && x->device == PCI_DEVICE_ID_AUREAL_ADVANTAGE))

/* PCM devices */
#define VORTEX_PCM_ADB        0
#define VORTEX_PCM_SPDIF      1
#define VORTEX_PCM_A3D        2
#define VORTEX_PCM_WT         3
#define VORTEX_PCM_I2S        4
#define VORTEX_PCM_LAST       5

#define MIX_CAPT(x) (vortex->mixcapt[x])
#define MIX_PLAYB(x) (vortex->mixplayb[x])
#define MIX_SPDIF(x) (vortex->mixspdif[x])

#define NR_WTPB 0x20          /* WT channels per eahc bank. */

/* Structs */
typedef struct {
      //int this_08;          /* Still unknown */
      int fifo_enabled; /* this_24 */
      int fifo_status;  /* this_1c */
      int dma_ctrl;           /* this_78 (ADB), this_7c (WT) */
      int dma_unknown;  /* this_74 (ADB), this_78 (WT). WDM: +8 */
      int cfg0;
      int cfg1;

      int nr_ch;        /* Nr of PCM channels in use */
      int type;         /* Output type (ac97, a3d, spdif, i2s, dsp) */
      int dma;          /* Hardware DMA index. */
      int dir;          /* Stream Direction. */
      u32 resources[5];

      /* Virtual page extender stuff */
      int nr_periods;
      int period_bytes;
      snd_pcm_sgbuf_t *sgbuf; /* DMA Scatter Gather struct */
      int period_real;
      int period_virt;

      snd_pcm_substream_t *substream;
} stream_t;

typedef struct snd_vortex vortex_t;
struct snd_vortex {
      /* ALSA structs. */
      snd_card_t *card;
      snd_pcm_t *pcm[VORTEX_PCM_LAST];

      snd_rawmidi_t *rmidi;   /* Legacy Midi interface. */
      ac97_t *codec;

      /* Stream structs. */
      stream_t dma_adb[NR_ADB];
      int spdif_sr;
#ifndef CHIP_AU8810
      stream_t dma_wt[NR_WT];
      wt_voice_t wt_voice[NR_WT];   /* WT register cache. */
      char mixwt[(NR_WT / NR_WTPB) * 6];  /* WT mixin objects */

      /* Global resources */
      s8 mixcapt[2];
      s8 mixplayb[4];
#ifndef CHIP_AU8820
      s8 mixspdif[2];
      s8 mixa3d[2];     /* mixers which collect all a3d streams. */
      s8 mixxtlk[2];    /* crosstalk canceler mixer inputs. */
      u32 fixed_res[5];

#ifndef CHIP_AU8820
      /* Hardware equalizer structs */
      eqlzr_t eq;
      /* A3D structs */
      a3dsrc_t a3d[NR_A3D];
      /* Xtalk canceler */
      int xt_mode;            /* 1: speakers, 0:headphones. */

      int isquad;       /* cache of extended ID codec flag. */

      /* Gameport stuff. */
      struct gameport *gameport;

      /* PCI hardware resources */
      unsigned long io;
      unsigned long __iomem *mmio;
      unsigned int irq;
      spinlock_t lock;

      /* PCI device */
      struct pci_dev *pci_dev;
      u16 vendor;
      u16 device;
      u8 rev;

/* Functions. */

/* SRC */
static void vortex_adb_setsrc(vortex_t * vortex, int adbdma,
                        unsigned int cvrt, int dir);

/* DMA Engines. */
static void vortex_adbdma_setbuffers(vortex_t * vortex, int adbdma,
                             snd_pcm_sgbuf_t * sgbuf, int size,
                             int count);
static void vortex_adbdma_setmode(vortex_t * vortex, int adbdma, int ie,
                          int dir, int fmt, int d,
                          unsigned long offset);
static void vortex_adbdma_setstartbuffer(vortex_t * vortex, int adbdma, int sb);
#ifndef CHIP_AU8810
static void vortex_wtdma_setbuffers(vortex_t * vortex, int wtdma,
                            snd_pcm_sgbuf_t * sgbuf, int size,
                            int count);
static void vortex_wtdma_setmode(vortex_t * vortex, int wtdma, int ie, int fmt, int d,    /*int e, */
                         unsigned long offset);
static void vortex_wtdma_setstartbuffer(vortex_t * vortex, int wtdma, int sb);

static void vortex_adbdma_startfifo(vortex_t * vortex, int adbdma);
//static void vortex_adbdma_stopfifo(vortex_t *vortex, int adbdma);
static void vortex_adbdma_pausefifo(vortex_t * vortex, int adbdma);
static void vortex_adbdma_resumefifo(vortex_t * vortex, int adbdma);
static int inline vortex_adbdma_getlinearpos(vortex_t * vortex, int adbdma);
static void vortex_adbdma_resetup(vortex_t *vortex, int adbdma);

#ifndef CHIP_AU8810
static void vortex_wtdma_startfifo(vortex_t * vortex, int wtdma);
static void vortex_wtdma_stopfifo(vortex_t * vortex, int wtdma);
static void vortex_wtdma_pausefifo(vortex_t * vortex, int wtdma);
static void vortex_wtdma_resumefifo(vortex_t * vortex, int wtdma);
static int inline vortex_wtdma_getlinearpos(vortex_t * vortex, int wtdma);

/* global stuff. */
static void vortex_codec_init(vortex_t * vortex);
static void vortex_codec_write(ac97_t * codec, unsigned short addr,
                         unsigned short data);
static unsigned short vortex_codec_read(ac97_t * codec, unsigned short addr);
static void vortex_spdif_init(vortex_t * vortex, int spdif_sr, int spdif_mode);

static int vortex_core_init(vortex_t * card);
static int vortex_core_shutdown(vortex_t * card);
static void vortex_enable_int(vortex_t * card);
static irqreturn_t vortex_interrupt(int irq, void *dev_id,
                            struct pt_regs *regs);
static int vortex_alsafmt_aspfmt(int alsafmt);

/* Connection  stuff. */
static void vortex_connect_default(vortex_t * vortex, int en);
static int vortex_adb_allocroute(vortex_t * vortex, int dma, int nr_ch,
                         int dir, int type);
static char vortex_adb_checkinout(vortex_t * vortex, int resmap[], int out,
                          int restype);
#ifndef CHIP_AU8810
static int vortex_wt_allocroute(vortex_t * vortex, int dma, int nr_ch);
static void vortex_wt_connect(vortex_t * vortex, int en);
static void vortex_wt_init(vortex_t * vortex);

static void vortex_route(vortex_t * vortex, int en, unsigned char channel,
                   unsigned char source, unsigned char dest);
#if 0
static void vortex_routes(vortex_t * vortex, int en, unsigned char channel,
                    unsigned char source, unsigned char dest0,
                    unsigned char dest1);
static void vortex_connection_mixin_mix(vortex_t * vortex, int en,
                              unsigned char mixin,
                              unsigned char mix, int a);
static void vortex_mix_setinputvolumebyte(vortex_t * vortex,
                                unsigned char mix, int mixin,
                                unsigned char vol);
static void vortex_mix_setvolumebyte(vortex_t * vortex, unsigned char mix,
                             unsigned char vol);

/* A3D functions. */
#ifndef CHIP_AU8820
static void vortex_Vort3D(vortex_t * v, int en);
static void vortex_Vort3D_connect(vortex_t * vortex, int en);
static void vortex_Vort3D_InitializeSource(a3dsrc_t * a, int en);

/* Driver stuff. */
static int __devinit vortex_gameport_register(vortex_t * card);
static int __devexit vortex_gameport_unregister(vortex_t * card);
#ifndef CHIP_AU8820
static int __devinit vortex_eq_init(vortex_t * vortex);
static int __devexit vortex_eq_free(vortex_t * vortex);
/* ALSA stuff. */
static int __devinit snd_vortex_new_pcm(vortex_t * vortex, int idx, int nr);
static int __devinit snd_vortex_mixer(vortex_t * vortex);
static int __devinit snd_vortex_midi(vortex_t * vortex);

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