atarihw.h

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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攔n Brauel
**
** 5/1/94 Roman Hodek:
**   Added definitions for TT specific chips.
**
** 1996-09-13 lars brinkhoff <[e-mail]>:
**   Finally added definitions for the matrix/codec and the DSP56001 host
**   interface.
**
** 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>
#include <asm/bootinfo.h>
#include <asm/raw_io.h>

extern u_long atari_mch_cookie;
extern u_long atari_mch_type;
extern u_long atari_switches;
extern int atari_rtc_year_offset;
extern int atari_dont_touch_floppy_select;

/* convenience macros for testing machine type */
#define MACH_IS_ST	((atari_mch_cookie >> 16) == ATARI_MCH_ST)
#define MACH_IS_STE	((atari_mch_cookie >> 16) == ATARI_MCH_STE && \
			 (atari_mch_cookie & 0xffff) == 0)
#define MACH_IS_MSTE	((atari_mch_cookie >> 16) == ATARI_MCH_STE && \
			 (atari_mch_cookie & 0xffff) == 0x10)
#define MACH_IS_TT	((atari_mch_cookie >> 16) == ATARI_MCH_TT)
#define MACH_IS_FALCON	((atari_mch_cookie >> 16) == ATARI_MCH_FALCON)
#define MACH_IS_MEDUSA	(atari_mch_type == ATARI_MACH_MEDUSA)
#define MACH_IS_HADES	(atari_mch_type == ATARI_MACH_HADES)
#define MACH_IS_AB40	(atari_mch_type == ATARI_MACH_AB40)

/* values for atari_switches */
#define ATARI_SWITCH_IKBD	0x01
#define ATARI_SWITCH_MIDI	0x02
#define ATARI_SWITCH_SND6	0x04
#define ATARI_SWITCH_SND7	0x08
#define ATARI_SWITCH_OVSC_SHIFT	16
#define ATARI_SWITCH_OVSC_IKBD	(ATARI_SWITCH_IKBD << ATARI_SWITCH_OVSC_SHIFT)
#define ATARI_SWITCH_OVSC_MIDI	(ATARI_SWITCH_MIDI << ATARI_SWITCH_OVSC_SHIFT)
#define ATARI_SWITCH_OVSC_SND6	(ATARI_SWITCH_SND6 << ATARI_SWITCH_OVSC_SHIFT)
#define ATARI_SWITCH_OVSC_SND7	(ATARI_SWITCH_SND7 << ATARI_SWITCH_OVSC_SHIFT)
#define ATARI_SWITCH_OVSC_MASK	0xffff0000
	
/*
 * Define several Hardware-Chips for indication so that for the ATARI we do
 * no longer decide whether it is a Falcon or other machine . It's just
 * important what hardware the machine uses
 */

/* ++roman 08/08/95: rewritten from ORing constants to a C bitfield */

#define ATARIHW_DECLARE(name)	unsigned name : 1
#define ATARIHW_SET(name)	(atari_hw_present.name = 1)
#define ATARIHW_PRESENT(name)	(atari_hw_present.name)

struct atari_hw_present {
    /* video hardware */
    ATARIHW_DECLARE(STND_SHIFTER);	/* ST-Shifter - no base low ! */
    ATARIHW_DECLARE(EXTD_SHIFTER);	/* STe-Shifter - 24 bit address */
    ATARIHW_DECLARE(TT_SHIFTER);	/* TT-Shifter */
    ATARIHW_DECLARE(VIDEL_SHIFTER);	/* Falcon-Shifter */
    /* sound hardware */
    ATARIHW_DECLARE(YM_2149);		/* Yamaha YM 2149 */
    ATARIHW_DECLARE(PCM_8BIT);		/* PCM-Sound in STe-ATARI */
    ATARIHW_DECLARE(CODEC);		/* CODEC Sound (Falcon) */
    /* disk storage interfaces */
    ATARIHW_DECLARE(TT_SCSI);		/* Directly mapped NCR5380 */
    ATARIHW_DECLARE(ST_SCSI);		/* NCR5380 via ST-DMA (Falcon) */
    ATARIHW_DECLARE(ACSI);		/* Standard ACSI like in STs */
    ATARIHW_DECLARE(IDE);		/* IDE Interface */
    ATARIHW_DECLARE(FDCSPEED);		/* 8/16 MHz switch for FDC */
    /* other I/O hardware */
    ATARIHW_DECLARE(ST_MFP);		/* The ST-MFP (there should be no Atari
					   without it... but who knows?) */
    ATARIHW_DECLARE(TT_MFP);		/* 2nd MFP */
    ATARIHW_DECLARE(SCC);		/* Serial Communications Contr. */
    ATARIHW_DECLARE(ST_ESCC);		/* SCC Z83230 in an ST */
    ATARIHW_DECLARE(ANALOG_JOY);	/* Paddle Interface for STe
					   and Falcon */
    ATARIHW_DECLARE(MICROWIRE);		/* Microwire Interface */
    /* DMA */
    ATARIHW_DECLARE(STND_DMA);		/* 24 Bit limited ST-DMA */
    ATARIHW_DECLARE(EXTD_DMA);		/* 32 Bit ST-DMA */
    ATARIHW_DECLARE(SCSI_DMA);		/* DMA for the NCR5380 */
    ATARIHW_DECLARE(SCC_DMA);		/* DMA for the SCC */
    /* real time clocks */
    ATARIHW_DECLARE(TT_CLK);		/* TT compatible clock chip */
    ATARIHW_DECLARE(MSTE_CLK);		/* Mega ST(E) clock chip */
    /* supporting hardware */
    ATARIHW_DECLARE(SCU);		/* System Control Unit */
    ATARIHW_DECLARE(BLITTER);		/* Blitter */
    ATARIHW_DECLARE(VME);		/* VME Bus */
    ATARIHW_DECLARE(DSP56K);		/* DSP56k processor in Falcon */
};

extern struct atari_hw_present atari_hw_present;


/* 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" );

/* 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).
 */


#define atari_readb   raw_inb
#define atari_writeb  raw_outb

#define atari_inb_p   raw_inb
#define atari_outb_p  raw_outb



#include <linux/mm.h>
#include <asm/pgalloc.h>

static inline void dma_cache_maintenance( unsigned long paddr,
					  unsigned long len,
					  int writeflag )

{
	if (writeflag) {
		if (!MACH_IS_MEDUSA || CPU_IS_060)
			cache_push( paddr, len );
	}
	else {
		if (!MACH_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
 */     

#define MATRIX_BASE (0xffff8930)
struct MATRIX
{
  u_short source;
  u_short destination;
  u_char external_frequency_divider;
  u_char internal_frequency_divider;
};
#define matrix (*(volatile struct MATRIX *)MATRIX_BASE)

#define CODEC_BASE (0xffff8936)
struct CODEC
{
  u_char tracks;
  u_char input_source;
#define CODEC_SOURCE_ADC        1
#define CODEC_SOURCE_MATRIX     2
  u_char adc_source;
#define ADC_SOURCE_RIGHT_PSG    1
#define ADC_SOURCE_LEFT_PSG     2
  u_char gain;
#define CODEC_GAIN_RIGHT        0x0f
#define CODEC_GAIN_LEFT         0xf0
  u_char attenuation;
#define CODEC_ATTENUATION_RIGHT 0x0f
#define CODEC_ATTENUATION_LEFT  0xf0
  u_char unused1;
  u_char status;
#define CODEC_OVERFLOW_RIGHT    1
#define CODEC_OVERFLOW_LEFT     2
  u_char unused2, unused3, unused4, unused5;
  u_char gpio_directions;
#define GPIO_IN                 0
#define GPIO_OUT                1
  u_char unused6;