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/*

** linux/atarihw.h -- This header defines some macros and pointers for

**                    the various Atari custom hardware registers.

**

** Copyright 1994 by Bj”rn Brauel

**

** 5/1/94 Roman Hodek:

**   Added definitions for TT specific chips.

**

** This file is subject to the terms and conditions of the GNU General Public

** License.  See the file COPYING in the main directory of this archive

** for more details.

**

*/

#ifndef _LINUX_ATARIHW_H_

#define _LINUX_ATARIHW_H_

#include <linux/types.h>

/* Reading the MFP port register gives a machine independent delay, since the

 * MFP always has a 8 MHz clock. This avoids problems with the varying length

 * of nops on various machines. Somebody claimed that the tstb takes 600 ns.

 */

#define MFPDELAY() \

        __asm__ __volatile__ ( "tstb %0" : : "m" (mfp.par_dt_reg) : "cc" );

/* Memory used for screen ram and stdma buffers */

void atari_stram_init (void);

void *atari_stram_alloc (long size, unsigned long *start_mem );

void atari_stram_free (void *);

extern int is_medusa;

/* Do cache push/invalidate for DMA read/write. This function obeys the

 * snooping on some machines (Medusa) and processors: The Medusa itself can

 * snoop, but only the '040 can source data from its cache to DMA writes i.e.,

 * reads from memory). Both '040 and '060 invalidate cache entries on snooped

 * DMA reads (i.e., writes to memory).

 */

#include <linux/mm.h>

#include <asm/pgtable.h>

static inline void dma_cache_maintenance( unsigned long paddr,

                                          unsigned long len,

                                          int writeflag )

{

        if (writeflag) {

                if (!is_medusa || m68k_is040or060 == 6)

                        cache_push( paddr, len );

        }

        else {

                if (!is_medusa)

                        cache_clear( paddr, len );

        }

}

/*

** Shifter

 */

#define ST_LOW  0

#define ST_MID  1

#define ST_HIGH 2

#define TT_LOW  7

#define TT_MID  4

#define TT_HIGH 6

#define SHF_BAS (0xffff8200)    

struct SHIFTER

 {

        u_char pad1;

        u_char bas_hi;

        u_char pad2;

        u_char bas_md;

        u_char pad3;

        u_char volatile vcounthi;

        u_char pad4;

        u_char volatile vcountmid;

        u_char pad5;

        u_char volatile vcountlow;

        u_char volatile syncmode;

        u_char pad6;

        u_char pad7;

        u_char bas_lo;

 };

# define shifter ((*(volatile struct SHIFTER *)SHF_BAS))

#define SHF_FBAS (0xffff820e)

struct SHIFTER_F030

 {

  u_short off_next;

  u_short scn_width;

 };

# define shifter_f030 ((*(volatile struct SHIFTER_F030 *)SHF_FBAS))

#define SHF_TBAS (0xffff8200)

struct SHIFTER_TT {

        u_char  char_dummy0;

        u_char  bas_hi;                 /* video mem base addr, high and mid byte */

        u_char  char_dummy1;

        u_char  bas_md;

        u_char  char_dummy2;

        u_char  vcount_hi;              /* pointer to currently displayed byte */

        u_char  char_dummy3;

        u_char  vcount_md;

        u_char  char_dummy4;

        u_char  vcount_lo;

        u_short st_sync;                /* ST compatible sync mode register, unused */

        u_char  char_dummy5;

        u_char  bas_lo;                 /* video mem addr, low byte */

        u_char  char_dummy6[2+3*16];

        /* $ffff8240: */

        u_short color_reg[16];  /* 16 color registers */

        u_char  st_shiftmode;   /* ST compatible shift mode register, unused */

        u_char  char_dummy7;

        u_short tt_shiftmode;   /* TT shift mode register */

};

#define shifter_tt      ((*(volatile struct SHIFTER_TT *)SHF_TBAS))

/* values for shifter_tt->tt_shiftmode */

#define TT_SHIFTER_STLOW                0x0000

#define TT_SHIFTER_STMID                0x0100

#define TT_SHIFTER_STHIGH               0x0200

#define TT_SHIFTER_TTLOW                0x0700

#define TT_SHIFTER_TTMID                0x0400

#define TT_SHIFTER_TTHIGH               0x0600

#define TT_SHIFTER_MODEMASK     0x0700

#define TT_SHIFTER_NUMMODE      0x0008

#define TT_SHIFTER_PALETTE_MASK 0x000f

#define TT_SHIFTER_GRAYMODE             0x1000

/* 256 TT palette registers */

#define TT_PALETTE_BASE (0xffff8400)

#define tt_palette      ((volatile u_short *)TT_PALETTE_BASE)

#define TT_PALETTE_RED_MASK             0x0f00

#define TT_PALETTE_GREEN_MASK   0x00f0

#define TT_PALETTE_BLUE_MASK    0x000f

/*

** Falcon030 VIDEL Video Controller

** for description see File 'linux\tools\atari\hardware.txt

 */

#define f030_col ((u_long *)            0xffff9800)

#define f030_xreg ((u_short*)           0xffff8282)

#define f030_yreg ((u_short*)           0xffff82a2)

#define f030_creg ((u_short*)           0xffff82c0)

#define f030_sreg ((u_short*)           0xffff8260)

#define f030_mreg ((u_short*)           0xffff820a)

#define f030_linewidth ((u_short*)      0xffff820e)

#define f030_hscroll ((u_char*)         0xffff8265)

#define VIDEL_BAS (0xffff8260)

struct VIDEL {

        u_short st_shift;

        u_short pad1;

        u_char  xoffset_s;

        u_char  xoffset;

        u_short f_shift;

        u_char  pad2[0x1a];

        u_short hht;

        u_short hbb;

        u_short hbe;

        u_short hdb;

        u_short hde;

        u_short hss;

        u_char  pad3[0x14];

        u_short vft;

        u_short vbb;

        u_short vbe;

        u_short vdb;

        u_short vde;

        u_short vss;

        u_char  pad4[0x12];

        u_short control;

        u_short mode;

};

#define videl   ((*(volatile struct VIDEL *)VIDEL_BAS))

/*

** DMA/WD1772 Disk Controller

 */

#define FWD_BAS (0xffff8604)  

struct DMA_WD

 {

  u_short fdc_acces_seccount;

  u_short dma_mode_status;

  u_char dma_vhi;       /* Some extended ST-DMAs can handle 32 bit addresses */

  u_char dma_hi;

  u_char char_dummy2;

  u_char dma_md;

  u_char char_dummy3;

  u_char dma_lo;

  u_short fdc_speed;

 };

# define dma_wd ((*(volatile struct DMA_WD *)FWD_BAS))

/* alias */

#define st_dma dma_wd

/* The two highest bytes of an extended DMA as a short; this is a must

 * for the Medusa.

 */

#define st_dma_ext_dmahi (*((volatile unsigned short *)0xffff8608))

/*

** YM2149 Sound Chip

** access in bytes

 */

#define YM_BAS (0xffff8800)

struct SOUND_YM

 {

  u_char rd_data_reg_sel;

  u_char char_dummy1;

  u_char wd_data;

 };

#define sound_ym ((*(volatile struct SOUND_YM *)YM_BAS))

/* TT SCSI DMA */

#define TT_SCSI_DMA_BAS (0xffff8700)

struct TT_DMA {

        u_char  char_dummy0;

        u_char  dma_addr_hi;

        u_char  char_dummy1;

        u_char  dma_addr_hmd;

        u_char  char_dummy2;

        u_char  dma_addr_lmd;

        u_char  char_dummy3;

        u_char  dma_addr_lo;

        u_char  char_dummy4;

        u_char  dma_cnt_hi;

        u_char  char_dummy5;

        u_char  dma_cnt_hmd;

        u_char  char_dummy6;

        u_char  dma_cnt_lmd;

        u_char  char_dummy7;

        u_char  dma_cnt_lo;

        u_long  dma_restdata;

        u_short dma_ctrl;

};

#define tt_scsi_dma     ((*(volatile struct TT_DMA *)TT_SCSI_DMA_BAS))

/* TT SCSI Controller 5380 */

#define TT_5380_BAS     (0xffff8781)

struct TT_5380 {

        u_char  scsi_data;

        u_char  char_dummy1;

        u_char  scsi_icr;

        u_char  char_dummy2;

        u_char  scsi_mode;

        u_char  char_dummy3;

        u_char  scsi_tcr;

        u_char  char_dummy4;

        u_char  scsi_idstat;

        u_char  char_dummy5;

        u_char  scsi_dmastat;

        u_char  char_dummy6;

        u_char  scsi_targrcv;

        u_char  char_dummy7;

        u_char  scsi_inircv;

};

#define tt_scsi                 ((*(volatile struct TT_5380 *)TT_5380_BAS))

#define tt_scsi_regp    ((volatile char *)TT_5380_BAS)

/*

** Falcon DMA Sound Subsystem

** not implemented yet

 */

/*

** Falcon Blitter

*/

#define BLT_BAS (0xffff8a00)

struct BLITTER

 {

  u_short halftone[16];

  u_short src_x_inc;

  u_short src_y_inc;

  u_long src_address;

  u_short endmask1;

  u_short endmask2;

  u_short endmask3;

  u_short dst_x_inc;

  u_short dst_y_inc;

  u_long dst_address;

  u_short wd_per_line;

  u_short ln_per_bb;

  u_short hlf_op_reg;

  u_short log_op_reg;

  u_short lin_nm_reg;

  u_short skew_reg;

 };

# define blitter ((*(volatile struct BLITTER *)BLT_BAS))

/*

** SCC Z8530

 */

#define SCC_BAS (0xffff8c81)

struct SCC

 {

  u_char cha_a_ctrl;

  u_char char_dummy1;

  u_char cha_a_data;

  u_char char_dummy2;

  u_char cha_b_ctrl;

  u_char char_dummy3;

  u_char cha_b_data;

 };

# define scc ((*(volatile struct SCC*)SCC_BAS))

/* The ESCC (Z85230) in an Atari ST. The channels are revered! */

# define st_escc ((*(volatile struct SCC*)0xfffffa31))

# define st_escc_dsr ((*(volatile char *)0xfffffa39))

/* TT SCC DMA Controller (same chip as SCSI DMA) */

#define TT_SCC_DMA_BAS  (0xffff8c01)

#define tt_scc_dma      ((*(volatile struct TT_DMA *)TT_SCC_DMA_BAS))

/*

** VIDEL Palette Register

 */

#define FPL_BAS (0xffff9800)

struct VIDEL_PALETTE

 {

  u_long reg[256];

 };

# define videl_palette ((*(volatile struct VIDEL_PALETTE*)FPL_BAS))

/*

** Falcon DSP Host Interface

** not implemented yet

 */

/*

** MFP 68901

 */

#define MFP_BAS (0xfffffa01)

struct MFP

 {

  u_char par_dt_reg;

  u_char char_dummy1;

  u_char active_edge;

  u_char char_dummy2;

  u_char data_dir;

  u_char char_dummy3;

  u_char int_en_a;

  u_char char_dummy4;

  u_char int_en_b;

  u_char char_dummy5;

  u_char int_pn_a;

  u_char char_dummy6;

  u_char int_pn_b;

  u_char char_dummy7;

  u_char int_sv_a;

  u_char char_dummy8;

  u_char int_sv_b;

  u_char char_dummy9;

  u_char int_mk_a;

  u_char char_dummy10;

  u_char int_mk_b;

  u_char char_dummy11;

  u_char vec_adr;

  u_char char_dummy12;

  u_char tim_ct_a;

  u_char char_dummy13;

  u_char tim_ct_b;

  u_char char_dummy14;

  u_char tim_ct_cd;

  u_char char_dummy15;

  u_char tim_dt_a;

  u_char char_dummy16;

  u_char tim_dt_b;

  u_char char_dummy17;

  u_char tim_dt_c;

  u_char char_dummy18;

  u_char tim_dt_d;

  u_char char_dummy19;

  u_char sync_char;

  u_char char_dummy20;

  u_char usart_ctr;

  u_char char_dummy21;

  u_char rcv_stat;

  u_char char_dummy22;

  u_char trn_stat;

  u_char char_dummy23;

  u_char usart_dta;

 };

# define mfp ((*(volatile struct MFP*)MFP_BAS))

/* TT's second MFP */

#define TT_MFP_BAS      (0xfffffa81)

# define tt_mfp ((*(volatile struct MFP*)TT_MFP_BAS))

/* TT System Control Unit */

#define TT_SCU_BAS      (0xffff8e01)

struct TT_SCU {

        u_char  sys_mask;

        u_char  char_dummy1;

        u_char  sys_stat;

        u_char  char_dummy2;

        u_char  softint;

        u_char  char_dummy3;

        u_char  vmeint;

        u_char  char_dummy4;

        u_char  gp_reg1;

        u_char  char_dummy5;

        u_char  gp_reg2;

        u_char  char_dummy6;

        u_char  vme_mask;

        u_char  char_dummy7;

        u_char  vme_stat;

};

#define tt_scu  ((*(volatile struct TT_SCU *)TT_SCU_BAS))

/* TT real time clock */

#define TT_RTC_BAS      (0xffff8961)

struct TT_RTC {

        u_char  regsel;

        u_char  dummy;

        u_char  data;

};

#define tt_rtc  ((*(volatile struct TT_RTC *)TT_RTC_BAS))

/*

** ACIA 6850

 */

/* constants for the ACIA registers */

/* baudrate selection and reset (Baudrate = clock/factor) */

#define ACIA_DIV1  0

#define ACIA_DIV16 1

#define ACIA_DIV64 2

#define ACIA_RESET 3

/* character format */

#define ACIA_D7E2S (0<<2)       /* 7 data, even parity, 2 stop */

#define ACIA_D7O2S (1<<2)       /* 7 data, odd parity, 2 stop */

#define ACIA_D7E1S (2<<2)       /* 7 data, even parity, 1 stop */

#define ACIA_D7O1S (3<<2)       /* 7 data, odd parity, 1 stop */

#define ACIA_D8N2S (4<<2)       /* 8 data, no parity, 2 stop */

#define ACIA_D8N1S (5<<2)       /* 8 data, no parity, 1 stop */

#define ACIA_D8E1S (6<<2)       /* 8 data, even parity, 1 stop */

#define ACIA_D8O1S (7<<2)       /* 8 data, odd parity, 1 stop */

/* transmit control */

#define ACIA_RLTID (0<<5)       /* RTS low, TxINT disabled */

#define ACIA_RLTIE (1<<5)       /* RTS low, TxINT enabled */

#define ACIA_RHTID (2<<5)       /* RTS high, TxINT disabled */

#define ACIA_RLTIDSB (3<<5)     /* RTS low, TxINT disabled, send break */

/* receive control */

#define ACIA_RID (0<<7)         /* RxINT disabled */

#define ACIA_RIE (1<<7)         /* RxINT enabled */

/* status fields of the ACIA */

#define ACIA_RDRF 1             /* Receive Data Register Full */

#define ACIA_TDRE (1<<1)        /* Transmit Data Register Empty */

#define ACIA_DCD  (1<<2)        /* Data Carrier Detect */

#define ACIA_CTS  (1<<3)        /* Clear To Send */

#define ACIA_FE   (1<<4)        /* Framing Error */

#define ACIA_OVRN (1<<5)        /* Receiver Overrun */

#define ACIA_PE   (1<<6)        /* Parity Error */

#define ACIA_IRQ  (1<<7)        /* Interrupt Request */

#define ACIA_BAS (0xfffffc00)

struct ACIA

 {

  u_char key_ctrl;

  u_char char_dummy1;

  u_char key_data;

  u_char char_dummy2;

  u_char mid_ctrl;

  u_char char_dummy3;

  u_char mid_data;

 };

# define acia ((*(volatile struct ACIA*)ACIA_BAS))

#define TT_DMASND_BAS (0xffff8900)

struct TT_DMASND {

        u_char  int_ctrl;       /* Falcon: Interrupt control */

        u_char  ctrl;

        u_char  pad2;

        u_char  bas_hi;

        u_char  pad3;

        u_char  bas_mid;

        u_char  pad4;

        u_char  bas_low;

        u_char  pad5;

        u_char  addr_hi;

        u_char  pad6;

        u_char  addr_mid;

        u_char  pad7;

        u_char  addr_low;

        u_char  pad8;

        u_char  end_hi;

        u_char  pad9;

        u_char  end_mid;

        u_char  pad10;

        u_char  end_low;

        u_char  pad11[12];

        u_char  track_select;   /* Falcon */

        u_char  mode;

        u_char  pad12[14];

        /* Falcon only: */

        u_short cbar_src;

        u_short cbar_dst;

        u_char  ext_div;

        u_char  int_div;

        u_char  rec_track_select;

        u_char  dac_src;

        u_char  adc_src;

        u_char  input_gain;

        u_short output_atten;

};

# define tt_dmasnd ((*(volatile struct TT_DMASND *)TT_DMASND_BAS))

#define DMASND_CTRL_OFF         0x00

#define DMASND_CTRL_ON          0x01

#define DMASND_CTRL_REPEAT      0x02

#define DMASND_MODE_MONO        0x80

#define DMASND_MODE_STEREO      0x00

#define DMASND_MODE_8BIT        0x00

#define DMASND_MODE_16BIT       0x40    /* Falcon only */

#define DMASND_MODE_6KHZ        0x00    /* Falcon: mute */

#define DMASND_MODE_12KHZ       0x01

#define DMASND_MODE_25KHZ       0x02

#define DMASND_MODE_50KHZ       0x03

#define DMASNDSetBase(bufstart)                                         \

    do {                                                                \

        tt_dmasnd.bas_hi  = (unsigned char)(((bufstart) & 0xff0000) >> 16); \

        tt_dmasnd.bas_mid = (unsigned char)(((bufstart) & 0x00ff00) >> 8); \

        tt_dmasnd.bas_low = (unsigned char) ((bufstart) & 0x0000ff); \

    } while( 0 )

#define DMASNDGetAdr() ((tt_dmasnd.addr_hi << 16) +     \

                        (tt_dmasnd.addr_mid << 8) +     \

                        (tt_dmasnd.addr_low))

#define DMASNDSetEnd(bufend)                            \

    do {                                                \

        tt_dmasnd.end_hi  = (unsigned char)(((bufend) & 0xff0000) >> 16); \

        tt_dmasnd.end_mid = (unsigned char)(((bufend) & 0x00ff00) >> 8); \

        tt_dmasnd.end_low = (unsigned char) ((bufend) & 0x0000ff); \

    } while( 0 )

#define TT_MICROWIRE_BAS        (0xffff8922)

struct TT_MICROWIRE {

        u_short data;

        u_short mask;

};

# define tt_microwire ((*(volatile struct TT_MICROWIRE *)TT_MICROWIRE_BAS))

#define MW_LM1992_ADDR          0x0400

#define MW_LM1992_VOLUME(dB)    \

    (0x0c0 | ((dB) < -80 ? 0 : (dB) > 0 ? 40 : (((dB) + 80) / 2)))

#define MW_LM1992_BALLEFT(dB)   \

    (0x140 | ((dB) < -40 ? 0 : (dB) > 0 ? 20 : (((dB) + 40) / 2)))

#define MW_LM1992_BALRIGHT(dB)  \

    (0x100 | ((dB) < -40 ? 0 : (dB) > 0 ? 20 : (((dB) + 40) / 2)))

#define MW_LM1992_TREBLE(dB)    \

    (0x080 | ((dB) < -12 ? 0 : (dB) > 12 ? 12 : (((dB) / 2) + 6)))

#define MW_LM1992_BASS(dB)      \

    (0x040 | ((dB) < -12 ? 0 : (dB) > 12 ? 12 : (((dB) / 2) + 6)))

#define MW_LM1992_PSG_LOW       0x000

#define MW_LM1992_PSG_HIGH      0x001

#define MW_LM1992_PSG_OFF       0x002

#define MSTE_RTC_BAS    (0xfffffc21)

struct MSTE_RTC {

        u_char sec_ones;

        u_char dummy1;

        u_char sec_tens;

        u_char dummy2;

        u_char min_ones;

        u_char dummy3;

        u_char min_tens;

        u_char dummy4;

        u_char hr_ones;

        u_char dummy5;

        u_char hr_tens;

        u_char dummy6;

        u_char weekday;

        u_char dummy7;

        u_char day_ones;

        u_char dummy8;

        u_char day_tens;

        u_char dummy9;

        u_char mon_ones;

        u_char dummy10;

        u_char mon_tens;

        u_char dummy11;

        u_char year_ones;

        u_char dummy12;

        u_char year_tens;

        u_char dummy13;

        u_char mode;

        u_char dummy14;

        u_char test;

        u_char dummy15;

        u_char reset;

};

#define mste_rtc ((*(volatile struct MSTE_RTC *)MSTE_RTC_BAS))

#endif /* linux/atarihw.h */