2 * Trantor T128/T128F/T228 defines
3 * Note : architecturally, the T100 and T128 are different and won't work
5 * Copyright 1993, Drew Eckhardt
7 * (Unix and Linux consulting and custom programming)
11 * DISTRIBUTION RELEASE 3.
13 * For more information, please consult
15 * Trantor Systems, Ltd.
16 * T128/T128F/T228 SCSI Host Adapter
17 * Hardware Specifications
19 * Trantor Systems, Ltd.
22 * 1+ (415) 770-1400, FAX 1+ (415) 770-9910
27 * SCSI Protocol Controller
30 * NCR Microelectronics
31 * 1635 Aeroplaza Drive
32 * Colorado Springs, CO 80916
44 #define T128_PUBLIC_RELEASE 3
47 #define TDEBUG_INIT 0x1
48 #define TDEBUG_TRANSFER 0x2
51 * The trantor boards are memory mapped. They use an NCR5380 or
52 * equivalent (my sample board had part second sourced from ZILOG).
53 * NCR's recommended "Pseudo-DMA" architecture is used, where
54 * a PAL drives the DMA signals on the 5380 allowing fast, blind
55 * transfers with proper handshaking.
59 * Note : a boot switch is provided for the purpose of informing the
60 * firmware to boot or not boot from attached SCSI devices. So, I imagine
61 * there are fewer people who've yanked the ROM like they do on the Seagate
62 * to make bootup faster, and I'll probably use this for autodetection.
64 #define T_ROM_OFFSET 0
67 * Note : my sample board *WAS NOT* populated with the SRAM, so this
68 * can't be used for autodetection without a ROM present.
70 #define T_RAM_OFFSET 0x1800
73 * All of the registers are allocated 32 bytes of address space, except
74 * for the data register (read/write to/from the 5380 in pseudo-DMA mode)
76 #define T_CONTROL_REG_OFFSET 0x1c00 /* rw */
77 #define T_CR_INT 0x10 /* Enable interrupts */
78 #define T_CR_CT 0x02 /* Reset watchdog timer */
80 #define T_STATUS_REG_OFFSET 0x1c20 /* ro */
81 #define T_ST_BOOT 0x80 /* Boot switch */
82 #define T_ST_S3 0x40 /* User settable switches, */
83 #define T_ST_S2 0x20 /* read 0 when switch is on, 1 off */
85 #define T_ST_PS2 0x08 /* Set for Microchannel 228 */
86 #define T_ST_RDY 0x04 /* 5380 DRQ */
87 #define T_ST_TIM 0x02 /* indicates 40us watchdog timer fired */
88 #define T_ST_ZERO 0x01 /* Always zero */
90 #define T_5380_OFFSET 0x1d00 /* 8 registers here, see NCR5380.h */
92 #define T_DATA_REG_OFFSET 0x1e00 /* rw 512 bytes long */
95 static int t128_abort(struct scsi_cmnd
*);
96 static int t128_biosparam(struct scsi_device
*, struct block_device
*,
98 static int t128_detect(struct scsi_host_template
*);
99 static int t128_queue_command(struct Scsi_Host
*, struct scsi_cmnd
*);
100 static int t128_bus_reset(struct scsi_cmnd
*);
103 #define CMD_PER_LUN 2
112 #define NCR5380_implementation_fields \
115 #define NCR5380_local_declare() \
118 #define NCR5380_setup(instance) \
119 base = ((struct NCR5380_hostdata *)(instance->hostdata))->base
121 #define T128_address(reg) (base + T_5380_OFFSET + ((reg) * 0x20))
123 #if !(TDEBUG & TDEBUG_TRANSFER)
124 #define NCR5380_read(reg) readb(T128_address(reg))
125 #define NCR5380_write(reg, value) writeb((value),(T128_address(reg)))
127 #define NCR5380_read(reg) \
128 (((unsigned char) printk("scsi%d : read register %d at address %08x\n"\
129 , instance->hostno, (reg), T128_address(reg))), readb(T128_address(reg)))
131 #define NCR5380_write(reg, value) { \
132 printk("scsi%d : write %02x to register %d at address %08x\n", \
133 instance->hostno, (value), (reg), T128_address(reg)); \
134 writeb((value), (T128_address(reg))); \
138 #define NCR5380_intr t128_intr
139 #define do_NCR5380_intr do_t128_intr
140 #define NCR5380_queue_command t128_queue_command
141 #define NCR5380_abort t128_abort
142 #define NCR5380_bus_reset t128_bus_reset
143 #define NCR5380_proc_info t128_proc_info
146 1101 0100 1010 1000 */
148 #define T128_IRQS 0xc4a8
150 #endif /* else def HOSTS_C */
151 #endif /* ndef ASM */
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