5 * Trantor T128/T128F/T228 driver
6 * Note : architecturally, the T100 and T130 are different and won't
9 * Copyright 1993, Drew Eckhardt
11 * (Unix and Linux consulting and custom programming)
15 * DISTRIBUTION RELEASE 3.
17 * For more information, please consult
19 * Trantor Systems, Ltd.
20 * T128/T128F/T228 SCSI Host Adapter
21 * Hardware Specifications
23 * Trantor Systems, Ltd.
26 * 1+ (415) 770-1400, FAX 1+ (415) 770-9910
31 * SCSI Protocol Controller
34 * NCR Microelectronics
35 * 1635 Aeroplaza Drive
36 * Colorado Springs, CO 80916
43 * AUTOSENSE - if defined, REQUEST SENSE will be performed automatically
44 * for commands that return with a CHECK CONDITION status.
46 * PSEUDO_DMA - enables PSEUDO-DMA hardware, should give a 3-4X performance
47 * increase compared to polled I/O.
49 * PARITY - enable parity checking. Not supported.
51 * SCSI2 - enable support for SCSI-II tagged queueing. Untested.
54 * UNSAFE - leave interrupts enabled during pseudo-DMA transfers. You
55 * only really want to use this if you're having a problem with
56 * dropped characters during high speed communications, and even
57 * then, you're going to be better off twiddling with transfersize.
59 * USLEEP - enable support for devices that don't disconnect. Untested.
61 * The card is detected and initialized in one of several ways :
62 * 1. Autoprobe (default) - since the board is memory mapped,
63 * a BIOS signature is scanned for to locate the registers.
64 * An interrupt is triggered to autoprobe for the interrupt
67 * 2. With command line overrides - t128=address,irq may be
68 * used on the LILO command line to override the defaults.
70 * 3. With the T128_OVERRIDE compile time define. This is
71 * specified as an array of address, irq tuples. Ie, for
72 * one board at the default 0xcc000 address, IRQ5, I could say
73 * -DT128_OVERRIDE={{0xcc000, 5}}
75 * Note that if the override methods are used, place holders must
76 * be specified for other boards in the system.
78 * T128/T128F jumper/dipswitch settings (note : on my sample, the switches
79 * were epoxy'd shut, meaning I couldn't change the 0xcc000 base address) :
81 * T128 Sw7 Sw8 Sw6 = 0ws Sw5 = boot
82 * T128F Sw6 Sw7 Sw5 = 0ws Sw4 = boot Sw8 = floppy disable
90 * There is a 12 pin jumper block, jp1, numbered as follows :
91 * T128 (JP1) T128F (J5)
92 * 2 4 6 8 10 12 11 9 7 5 3 1
93 * 1 3 5 7 9 11 12 10 8 6 4 2
109 #include <asm/system.h>
110 #include <linux/signal.h>
111 #include <linux/sched.h>
113 #include <linux/blk.h>
117 #define AUTOPROBE_IRQ
119 #include "constants.h"
121 #include <linux/stat.h>
122 #include <linux/init.h>
124 static struct override
{
125 unsigned long address
;
129 [] __initdata
= T128_OVERRIDE
;
131 [4] __initdata
= {{0, IRQ_AUTO
}, {0, IRQ_AUTO
},
132 {0 ,IRQ_AUTO
}, {0, IRQ_AUTO
}};
135 #define NO_OVERRIDES (sizeof(overrides) / sizeof(struct override))
138 unsigned int address
;
140 } bases
[] __initdata
= {
141 { 0xcc000, 0}, { 0xc8000, 0}, { 0xdc000, 0}, { 0xd8000, 0}
144 #define NO_BASES (sizeof (bases) / sizeof (struct base))
146 static const struct signature
{
149 } signatures
[] __initdata
= {
150 {"TSROM: SCSI BIOS, Version 1.12", 0x36},
153 #define NO_SIGNATURES (sizeof (signatures) / sizeof (struct signature))
156 * Function : t128_setup(char *str, int *ints)
158 * Purpose : LILO command line initialization of the overrides array,
160 * Inputs : str - unused, ints - array of integer parameters with ints[0]
161 * equal to the number of ints.
165 void __init
t128_setup(char *str
, int *ints
){
166 static int commandline_current
= 0;
169 printk("t128_setup : usage t128=address,irq\n");
171 if (commandline_current
< NO_OVERRIDES
) {
172 overrides
[commandline_current
].address
= ints
[1];
173 overrides
[commandline_current
].irq
= ints
[2];
174 for (i
= 0; i
< NO_BASES
; ++i
)
175 if (bases
[i
].address
== ints
[1]) {
179 ++commandline_current
;
184 * Function : int t128_detect(Scsi_Host_Template * tpnt)
186 * Purpose : detects and initializes T128,T128F, or T228 controllers
187 * that were autoprobed, overridden on the LILO command line,
188 * or specified at compile time.
190 * Inputs : tpnt - template for this SCSI adapter.
192 * Returns : 1 if a host adapter was found, 0 if not.
196 int __init
t128_detect(Scsi_Host_Template
* tpnt
){
197 static int current_override
= 0, current_base
= 0;
198 struct Scsi_Host
*instance
;
202 tpnt
->proc_name
= "t128";
203 tpnt
->proc_info
= &t128_proc_info
;
205 for (count
= 0; current_override
< NO_OVERRIDES
; ++current_override
) {
208 if (overrides
[current_override
].address
)
209 base
= overrides
[current_override
].address
;
211 for (; !base
&& (current_base
< NO_BASES
); ++current_base
) {
212 #if (TDEBUG & TDEBUG_INIT)
213 printk("scsi-t128 : probing address %08x\n", bases
[current_base
].address
);
215 for (sig
= 0; sig
< NO_SIGNATURES
; ++sig
)
216 if (!bases
[current_base
].noauto
&&
217 isa_check_signature(bases
[current_base
].address
+
218 signatures
[sig
].offset
,
219 signatures
[sig
].string
,
220 strlen(signatures
[sig
].string
))) {
221 base
= bases
[current_base
].address
;
222 #if (TDEBUG & TDEBUG_INIT)
223 printk("scsi-t128 : detected board.\n");
229 #if defined(TDEBUG) && (TDEBUG & TDEBUG_INIT)
230 printk("scsi-t128 : base = %08x\n", (unsigned int) base
);
236 instance
= scsi_register (tpnt
, sizeof(struct NCR5380_hostdata
));
237 instance
->base
= base
;
239 NCR5380_init(instance
, 0);
241 if (overrides
[current_override
].irq
!= IRQ_AUTO
)
242 instance
->irq
= overrides
[current_override
].irq
;
244 instance
->irq
= NCR5380_probe_irq(instance
, T128_IRQS
);
246 if (instance
->irq
!= IRQ_NONE
)
247 if (request_irq(instance
->irq
, do_t128_intr
, SA_INTERRUPT
, "t128", NULL
)) {
248 printk("scsi%d : IRQ%d not free, interrupts disabled\n",
249 instance
->host_no
, instance
->irq
);
250 instance
->irq
= IRQ_NONE
;
253 if (instance
->irq
== IRQ_NONE
) {
254 printk("scsi%d : interrupts not enabled. for better interactive performance,\n", instance
->host_no
);
255 printk("scsi%d : please jumper the board for a free IRQ.\n", instance
->host_no
);
258 #if defined(TDEBUG) && (TDEBUG & TDEBUG_INIT)
259 printk("scsi%d : irq = %d\n", instance
->host_no
, instance
->irq
);
262 printk("scsi%d : at 0x%08lx", instance
->host_no
, instance
->base
);
263 if (instance
->irq
== IRQ_NONE
)
264 printk (" interrupts disabled");
266 printk (" irq %d", instance
->irq
);
267 printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d",
268 CAN_QUEUE
, CMD_PER_LUN
, T128_PUBLIC_RELEASE
);
269 NCR5380_print_options(instance
);
279 * Function : int t128_biosparam(Disk * disk, kdev_t dev, int *ip)
281 * Purpose : Generates a BIOS / DOS compatible H-C-S mapping for
282 * the specified device / size.
284 * Inputs : size = size of device in sectors (512 bytes), dev = block device
285 * major / minor, ip[] = {heads, sectors, cylinders}
287 * Returns : always 0 (success), initializes ip
292 * XXX Most SCSI boards use this mapping, I could be incorrect. Some one
293 * using hard disks on a trantor should verify that this mapping corresponds
294 * to that used by the BIOS / ASPI driver by running the linux fdisk program
295 * and matching the H_C_S coordinates to what DOS uses.
298 int t128_biosparam(Disk
* disk
, kdev_t dev
, int * ip
)
300 int size
= disk
->capacity
;
308 * Function : int NCR5380_pread (struct Scsi_Host *instance,
309 * unsigned char *dst, int len)
311 * Purpose : Fast 5380 pseudo-dma read function, transfers len bytes to
314 * Inputs : dst = destination, len = length in bytes
316 * Returns : 0 on success, non zero on a failure such as a watchdog
320 static inline int NCR5380_pread (struct Scsi_Host
*instance
, unsigned char *dst
,
322 unsigned long reg
= instance
->base
+ T_DATA_REG_OFFSET
;
323 unsigned char *d
= dst
;
324 register int i
= len
;
329 while (!(isa_readb(instance
->base
+T_STATUS_REG_OFFSET
) & T_ST_RDY
)) barrier();
331 while (!(isa_readb(instance
->base
+T_STATUS_REG_OFFSET
) & T_ST_RDY
)) barrier();
334 *d
++ = isa_readb(reg
);
337 if (isa_readb(instance
->base
+ T_STATUS_REG_OFFSET
) & T_ST_TIM
) {
340 foo
= instance
->base
+ T_CONTROL_REG_OFFSET
;
341 tmp
= isa_readb(foo
);
342 isa_writeb(tmp
| T_CR_CT
, foo
);
343 isa_writeb(tmp
, foo
);
344 printk("scsi%d : watchdog timer fired in NCR5380_pread()\n",
352 * Function : int NCR5380_pwrite (struct Scsi_Host *instance,
353 * unsigned char *src, int len)
355 * Purpose : Fast 5380 pseudo-dma write function, transfers len bytes from
358 * Inputs : src = source, len = length in bytes
360 * Returns : 0 on success, non zero on a failure such as a watchdog
364 static inline int NCR5380_pwrite (struct Scsi_Host
*instance
, unsigned char *src
,
366 unsigned long reg
= instance
->base
+ T_DATA_REG_OFFSET
;
367 unsigned char *s
= src
;
368 register int i
= len
;
372 while (!(isa_readb(instance
->base
+T_STATUS_REG_OFFSET
) & T_ST_RDY
)) barrier();
374 while (!(isa_readb(instance
->base
+T_STATUS_REG_OFFSET
) & T_ST_RDY
)) barrier();
377 isa_writeb(*s
++, reg
);
380 if (isa_readb(instance
->base
+ T_STATUS_REG_OFFSET
) & T_ST_TIM
) {
383 foo
= instance
->base
+ T_CONTROL_REG_OFFSET
;
384 tmp
= isa_readb(foo
);
385 isa_writeb(tmp
| T_CR_CT
, foo
);
386 isa_writeb(tmp
, foo
);
387 printk("scsi%d : watchdog timer fired in NCR5380_pwrite()\n",
397 /* Eventually this will go into an include file, but this will be later */
398 Scsi_Host_Template driver_template
= TRANTOR_T128
;
400 #include "scsi_module.c"