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Diffstat (limited to 'drivers/scsi/t128.h')
| -rw-r--r-- | drivers/scsi/t128.h | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/drivers/scsi/t128.h b/drivers/scsi/t128.h new file mode 100644 index 00000000000..161ba53d982 --- /dev/null +++ b/drivers/scsi/t128.h @@ -0,0 +1,155 @@ +/* + * 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) + * drew@colorado.edu + * +1 (303) 440-4894 + * + * 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+ (415) 770-1400, FAX 1+ (415) 770-9910 + * + * and + * + * NCR 5380 Family + * SCSI Protocol Controller + * Databook + * + * NCR Microelectronics + * 1635 Aeroplaza Drive + * Colorado Springs, CO 80916 + * 1+ (719) 578-3400 + * 1+ (800) 334-5454 + */ + +/* + * $Log: t128.h,v $ + */ + +#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 +static int t128_abort(Scsi_Cmnd *); +static int t128_biosparam(struct scsi_device *, struct block_device *, + sector_t, int*); +static int t128_detect(Scsi_Host_Template *); +static int t128_queue_command(Scsi_Cmnd *, void (*done)(Scsi_Cmnd *)); +static int t128_host_reset(Scsi_Cmnd *); +static int t128_bus_reset(Scsi_Cmnd *); +static int t128_device_reset(Scsi_Cmnd *); + +#ifndef CMD_PER_LUN +#define CMD_PER_LUN 2 +#endif + +#ifndef CAN_QUEUE +#define CAN_QUEUE 32 +#endif + +#ifndef HOSTS_C + +#define NCR5380_implementation_fields \ + void __iomem *base + +#define NCR5380_local_declare() \ + void __iomem *base + +#define NCR5380_setup(instance) \ + base = ((struct NCR5380_hostdata *)(instance->hostdata))->base + +#define T128_address(reg) (base + T_5380_OFFSET + ((reg) * 0x20)) + +#if !(TDEBUG & TDEBUG_TRANSFER) +#define NCR5380_read(reg) readb(T128_address(reg)) +#define NCR5380_write(reg, value) writeb((value),(T128_address(reg))) +#else +#define NCR5380_read(reg) \ + (((unsigned char) printk("scsi%d : read register %d at address %08x\n"\ + , instance->hostno, (reg), T128_address(reg))), readb(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)); \ + writeb((value), (T128_address(reg))); \ +} +#endif + +#define NCR5380_intr t128_intr +#define do_NCR5380_intr do_t128_intr +#define NCR5380_queue_command t128_queue_command +#define NCR5380_abort t128_abort +#define NCR5380_host_reset t128_host_reset +#define NCR5380_device_reset t128_device_reset +#define NCR5380_bus_reset t128_bus_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 */ |