t128.h

GNU Mach 微内核源代码, 基于美国卡内基美隆大学的 Mach 研究项目

/*
 * Trantor T128/T128F/T228 defines
 *	Note : architecturally, the T100 and T128 are different and won't work
 *
 * Copyright 1993, Drew Eckhardt
 *	Visionary Computing
 *	(Unix and Linux consulting and custom programming)
 *	[e-mail]
 *      [phone]
 *
 * DISTRIBUTION RELEASE 3. 
 *
 * For more information, please consult 
 *
 * Trantor Systems, Ltd.
 * T128/T128F/T228 SCSI Host Adapter
 * Hardware Specifications
 * 
 * Trantor Systems, Ltd. 
 * 5415 Randall Place
 * Fremont, CA 94538
 * 1+ [phone], FAX 1+ [phone]
 * 
 * and 
 *
 * NCR 5380 Family
 * SCSI Protocol Controller
 * Databook
 *
 * NCR Microelectronics
 * 1635 Aeroplaza Drive
 * Colorado Springs, CO 80916
 * 1+ [phone]
 * 1+ [phone]
 */

/*
 * $Log: t128.h,v $
 * Revision 1.1  1999/04/26 05:55:09  tb
 * 1998-11-30  OKUJI Yoshinori  <[e-mail]>
 *
 * 	Clean up linux emulation code to make it architecture-independent
 * 	as much as possible.
 *
 * 	* linux: Renamed from linuxdev.
 * 	* Makefile.in (objfiles): Add linux.o instead of linuxdev.o.
 * 	(MAKE): New variable. Used for the linux.o target.
 * 	* configure.in: Add AC_CHECK_TOOL(MAKE, make).
 * 	* i386/i386/spl.h: Include <i386/ipl.h>, for compatibility with
 * 	OSF Mach 3.0. Suggested by Elgin Lee <[e-mail]>.
 * 	* linux/src: Renamed from linux/linux.
 * 	* linux/dev: Renamed from linux/mach.
 * 	* linux/Drivers.in (AC_INIT): Use dev/include/linux/autoconf.h,
 * 	instead of mach/include/linux/autoconf.h.
 * 	* Makefile.in (all): Target ../linux.o instead of ../linuxdev.o.
 * 	* linux/dev/drivers/block/genhd.c: Include <machine/spl.h> instead
 * 	of <i386/ipl.h>.
 * 	* linux/dev/drivers/net/auto_irq.c: Remove unneeded header files,
 * 	<i386/ipl.h> and <i386/pic.h>.
 * 	* linux/dev/init/main.c: Many i386-dependent codes moved to ...
 * 	* linux/dev/arch/i386/irq.c: ... here.
 * 	* linux/dev/arch/i386/setup.c: New file.
 * 	* linux/dev/arch/i386/linux_emul.h: Likewise.
 * 	* linux/dev/arch/i386/glue/timer.c: Merged into sched.c.
 * 	* linux/dev/arch/i386/glue/sched.c: Include <machine/spl.h> instead
 * 	of <i386/ipl.h>, and moved to ...
 * 	* linux/dev/kernel/sched.c: ... here.
 * 	* linux/dev/arch/i386/glue/block.c: Include <machine/spl.h> and
 * 	<linux_emul.h>, instead of i386-dependent header files, and
 * 	moved to ...
 * 	* linux/dev/glue/blocl.c: ... here.
 * 	* linux/dev/arch/i386/glue/net.c: Include <machine/spl.h> and
 * 	<linux_emul.h>, instead of i386-dependent header files, and
 * 	moved to ...
 * 	* linux/dev/glue/net.c: ... here.
 * 	* linux/dev/arch/i386/glue/misc.c: Remove `x86' and moved to ...
 * 	* linux/dev/glue/misc.c: ... here.
 * 	* linux/dev/arch/i386/glue/kmem.c: Moved to ...
 * 	* linux/dev/glue/kmem.c: ... here.
 *
 */

#ifndef T128_H
#define T128_H

#define T128_PUBLIC_RELEASE 3

#define TDEBUG_INIT	0x1
#define TDEBUG_TRANSFER 0x2

/*
 * The trantor boards are memory mapped. They use an NCR5380 or 
 * equivalent (my sample board had part second sourced from ZILOG).
 * NCR's recommended "Pseudo-DMA" architecture is used, where 
 * a PAL drives the DMA signals on the 5380 allowing fast, blind
 * transfers with proper handshaking. 
 */

/*
 * Note : a boot switch is provided for the purpose of informing the 
 * firmware to boot or not boot from attached SCSI devices.  So, I imagine
 * there are fewer people who've yanked the ROM like they do on the Seagate
 * to make bootup faster, and I'll probably use this for autodetection.
 */
#define T_ROM_OFFSET		0

/*
 * Note : my sample board *WAS NOT* populated with the SRAM, so this
 * can't be used for autodetection without a ROM present.
 */
#define T_RAM_OFFSET		0x1800

/*
 * All of the registers are allocated 32 bytes of address space, except
 * for the data register (read/write to/from the 5380 in pseudo-DMA mode)
 */ 
#define T_CONTROL_REG_OFFSET	0x1c00	/* rw */
#define T_CR_INT		0x10	/* Enable interrupts */
#define T_CR_CT			0x02	/* Reset watchdog timer */

#define T_STATUS_REG_OFFSET	0x1c20	/* ro */
#define T_ST_BOOT		0x80	/* Boot switch */
#define T_ST_S3			0x40	/* User settable switches, */
#define T_ST_S2			0x20	/* read 0 when switch is on, 1 off */
#define T_ST_S1			0x10
#define T_ST_PS2		0x08	/* Set for Microchannel 228 */
#define T_ST_RDY		0x04	/* 5380 DRQ */
#define T_ST_TIM		0x02	/* indicates 40us watchdog timer fired */
#define T_ST_ZERO		0x01	/* Always zero */

#define T_5380_OFFSET		0x1d00	/* 8 registers here, see NCR5380.h */

#define T_DATA_REG_OFFSET	0x1e00	/* rw 512 bytes long */

#ifndef ASM
int t128_abort(Scsi_Cmnd *);
int t128_biosparam(Disk *, kdev_t, int*);
int t128_detect(Scsi_Host_Template *);
int t128_queue_command(Scsi_Cmnd *, void (*done)(Scsi_Cmnd *));
int t128_reset(Scsi_Cmnd *, unsigned int reset_flags);
int t128_proc_info (char *buffer, char **start, off_t offset,
		   int length, int hostno, int inout);

#ifndef NULL
#define NULL 0
#endif

#ifndef CMD_PER_LUN
#define CMD_PER_LUN 2
#endif

#ifndef CAN_QUEUE
#define CAN_QUEUE 32 
#endif

/* 
 * I hadn't thought of this with the earlier drivers - but to prevent
 * macro definition conflicts, we shouldn't define all of the internal
 * macros when this is being used solely for the host stub.
 */

#if defined(HOSTS_C) || defined(MODULE)

#define TRANTOR_T128 {NULL, NULL, NULL, NULL, \
	"Trantor T128/T128F/T228", t128_detect, NULL,  \
	NULL,							\
	NULL, t128_queue_command, t128_abort, t128_reset, NULL, 	\
	t128_biosparam, 						\
	/* can queue */ CAN_QUEUE, /* id */ 7, SG_ALL,			\
	/* cmd per lun */ CMD_PER_LUN , 0, 0, DISABLE_CLUSTERING}

#endif

#ifndef HOSTS_C

#define NCR5380_implementation_fields \
    volatile unsigned char *base

#define NCR5380_local_declare() \
    volatile unsigned char *base

#define NCR5380_setup(instance) \
    base = (volatile unsigned char *) (instance)->base

#define T128_address(reg) (base + T_5380_OFFSET + ((reg) * 0x20))

#if !(TDEBUG & TDEBUG_TRANSFER) 
#define NCR5380_read(reg) (*(T128_address(reg)))
#define NCR5380_write(reg, value) (*(T128_address(reg)) = (value))
#else
#define NCR5380_read(reg)						\
    (((unsigned char) printk("scsi%d : read register %d at address %08x\n"\
    , instance->hostno, (reg), T128_address(reg))), *(T128_address(reg)))

#define NCR5380_write(reg, value) {					\
    printk("scsi%d : write %02x to register %d at address %08x\n", 	\
	    instance->hostno, (value), (reg), T128_address(reg));	\
    *(T128_address(reg)) = (value);					\
}
#endif

#define NCR5380_intr t128_intr
#define NCR5380_queue_command t128_queue_command
#define NCR5380_abort t128_abort
#define NCR5380_reset t128_reset
#define NCR5380_proc_info t128_proc_info

/* 15 14 12 10 7 5 3 
   1101 0100 1010 1000 */
   
#define T128_IRQS 0xc4a8 

#endif /* else def HOSTS_C */
#endif /* ndef ASM */
#endif /* T128_H */