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*/
1 #define AUTOSENSE
2 #define PSEUDO_DMA
3
4 /*
5 * Trantor T128/T128F/T228 driver
6 * Note : architecturally, the T100 and T130 are different and won't
7 * work
8 *
9 * Copyright 1993, Drew Eckhardt
10 * Visionary Computing
11 * (Unix and Linux consulting and custom programming)
12 * drew@colorado.edu
13 * +1 (303) 440-4894
14 *
15 * DISTRIBUTION RELEASE 3.
16 *
17 * For more information, please consult
18 *
19 * Trantor Systems, Ltd.
20 * T128/T128F/T228 SCSI Host Adapter
21 * Hardware Specifications
22 *
23 * Trantor Systems, Ltd.
24 * 5415 Randall Place
25 * Fremont, CA 94538
26 * 1+ (415) 770-1400, FAX 1+ (415) 770-9910
27 *
28 * and
29 *
30 * NCR 5380 Family
31 * SCSI Protocol Controller
32 * Databook
33 *
34 * NCR Microelectronics
35 * 1635 Aeroplaza Drive
36 * Colorado Springs, CO 80916
37 * 1+ (719) 578-3400
38 * 1+ (800) 334-5454
39 */
40
41 /*
42 * Options :
43 * AUTOSENSE - if defined, REQUEST SENSE will be performed automatically
44 * for commands that return with a CHECK CONDITION status.
45 *
46 * PSEUDO_DMA - enables PSEUDO-DMA hardware, should give a 3-4X performance
47 * increase compared to polled I/O.
48 *
49 * PARITY - enable parity checking. Not supported.
50 *
51 * SCSI2 - enable support for SCSI-II tagged queueing. Untested.
52 *
53 *
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.
58 *
59 * USLEEP - enable support for devices that don't disconnect. Untested.
60 *
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
65 * line.
66 *
67 * 2. With command line overrides - t128=address,irq may be
68 * used on the LILO command line to override the defaults.
69 *
70 * 3. With the T128_OVERRIDE compile time define. This is
71 * specified as an array of address, irq tupples. Ie, for
72 * one board at the default 0xcc000 address, IRQ5, I could say
73 * -DT128_OVERRIDE={{0xcc000, 5}}
74 *
75 * Note that if the override methods are used, place holders must
76 * be specified for other boards in the system.
77 *
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) :
80 *
81 * T128 Sw7 Sw8 Sw6 = 0ws Sw5 = boot
82 * T128F Sw6 Sw7 Sw5 = 0ws Sw4 = boot Sw8 = floppy disable
83 * cc000 off off
84 * c8000 off on
85 * dc000 on off
86 * d8000 on on
87 *
88 *
89 * Interrupts
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
94 *
95 * 3 2-4
96 * 5 1-3
97 * 7 3-5
98 * T128F only
99 * 10 8-10
100 * 12 7-9
101 * 14 10-12
102 * 15 9-11
103 */
104
105 /*
106 * $Log: t128.c,v $
107 */
108
109 #include <asm/system.h>
110 #include <linux/signal.h>
111 #include <linux/sched.h>
112 #include "../block/blk.h"
113 #include "scsi.h"
114 #include "hosts.h"
115 #include "t128.h"
116 #define AUTOPROBE_IRQ
117 #include "NCR5380.h"
118 #include "constants.h"
119
120
121
122
123 static struct override {
124 unsigned char *address;
125 int irq;
126 } overrides
127 #ifdef T128_OVERRIDE
128 [] = T128_OVERRIDE;
129 #else
130 [4] = {{NULL,IRQ_AUTO}, {NULL,IRQ_AUTO}, {NULL,IRQ_AUTO},
131 {NULL,IRQ_AUTO}};
132 #endif
133
134 #define NO_OVERRIDES (sizeof(overrides) / sizeof(struct override))
135
136 static struct base {
137 unsigned char *address;
138 int noauto;
139 } bases[] = {{(unsigned char *) 0xcc000, 0}, {(unsigned char *) 0xc8000, 0},
140 {(unsigned char *) 0xdc000, 0}, {(unsigned char *) 0xd8000, 0}};
141
142 #define NO_BASES (sizeof (bases) / sizeof (struct base))
143
144 static const struct signature {
145 const char *string;
146 int offset;
147 } signatures[] = {
148 {"TSROM: SCSI BIOS, Version 1.12", 0x36},
149 };
150
151 #define NO_SIGNATURES (sizeof (signatures) / sizeof (struct signature))
152
153 /*
154 * Function : t128_setup(char *str, int *ints)
155 *
156 * Purpose : LILO command line initialization of the overrides array,
157 *
158 * Inputs : str - unused, ints - array of integer paramters with ints[0]
159 * equal to the number of ints.
160 *
161 */
162
163 void t128_setup(char *str, int *ints) {
164 static int commandline_current = 0;
165 int i;
166 if (ints[0] != 2)
167 printk("t128_setup : usage t128=address,irq\n");
168 else
169 if (commandline_current < NO_OVERRIDES) {
170 overrides[commandline_current].address = (unsigned char *) ints[1];
171 overrides[commandline_current].irq = ints[2];
172 for (i = 0; i < NO_BASES; ++i)
173 if (bases[i].address == (unsigned char *) ints[1]) {
174 bases[i].noauto = 1;
175 break;
176 }
177 ++commandline_current;
178 }
179 }
180
181 static struct sigaction t128_sigaction = { t128_intr, 0, SA_INTERRUPT , NULL };
182
183 /*
184 * Function : int t128_detect(int hostno)
185 *
186 * Purpose : detects and initializes T128,T128F, or T228 controllers
187 * that were autoprobed, overriden on the LILO command line,
188 * or specified at compile time.
189 *
190 * Inputs : hostno - id of this SCSI adapter.
191 *
192 * Returns : 1 if a host adapter was found, 0 if not.
193 *
194 */
195
196 int t128_detect(int hostno) {
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*/
197 static int current_override = 0, current_base = 0;
198 struct Scsi_Host *instance;
199 unsigned char *base;
200 int sig, count;
201
202 for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
203 base = NULL;
204
205 if (overrides[current_override].address)
206 base = overrides[current_override].address;
207 else
208 for (; !base && (current_base < NO_BASES); ++current_base) {
209 #if (TDEBUG & TDEBUG_INIT)
210 printk("scsi%d : probing address %08x\n", hostno, (unsigned int) bases[current_base].address);
211 #endif
212 for (sig = 0; sig < NO_SIGNATURES; ++sig)
213 if (!bases[current_base].noauto && !memcmp
214 (bases[current_base].address + signatures[sig].offset,
215 signatures[sig].string, strlen(signatures[sig].string))) {
216 base = bases[current_base].address;
217 #if (TDEBUG & TDEBUG_INIT)
218 printk("scsi%d : detected board.\n", hostno);
219 #endif
220 break;
221 }
222 }
223
224 #if defined(TDEBUG) && (TDEBUG & TDEBUG_INIT)
225 printk("scsi%d : base = %08x\n", hostno, (unsigned int) base);
226 #endif
227
228 if (!base)
229 break;
230
231 instance = scsi_register (hostno, sizeof(struct NCR5380_hostdata));
232 instance->base = base;
233
234 NCR5380_init(instance);
235
236 if (overrides[current_override].irq != IRQ_AUTO)
237 instance->irq = overrides[current_override].irq;
238 else
239 instance->irq = NCR5380_probe_irq(instance, T128_IRQS);
240
241 if (instance->irq != IRQ_NONE)
242 if (irqaction (instance->irq, &t128_sigaction)) {
243 printk("scsi%d : IRQ%d not free, interrupts disabled\n",
244 hostno, instance->irq);
245 instance->irq = IRQ_NONE;
246 }
247
248 if (instance->irq == IRQ_NONE) {
249 printk("scsi%d : interrupts not enabled. for better interactive performance,\n", hostno);
250 printk("scsi%d : please jumper the board for a free IRQ.\n", hostno);
251 }
252
253 #if defined(TDEBUG) && (TDEBUG & TDEBUG_INIT)
254 printk("scsi%d : irq = %d\n", hostno, instance->irq);
255 #endif
256
257 printk("scsi%d : at 0x%08x", instance->host_no, (int)
258 instance->base);
259 if (instance->irq == IRQ_NONE)
260 printk (" interrupts disabled");
261 else
262 printk (" irq %d", instance->irq);
263 printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d",
264 CAN_QUEUE, CMD_PER_LUN, T128_PUBLIC_RELEASE);
265 NCR5380_print_options(instance);
266 printk("\n");
267
268 ++current_override;
269 ++count;
270 ++hostno;
271 }
272 return count;
273 }
274
275 /*
276 * Function : int t128_biosparam(int size, int dev, int *ip)
277 *
278 * Purpose : Generates a BIOS / DOS compatable H-C-S mapping for
279 * the specified device / size.
280 *
281 * Inputs : size = size of device in sectors (512 bytes), dev = block device
282 * major / minor, ip[] = {heads, sectors, cylinders}
283 *
284 * Returns : allways 0 (success), initializes ip
285 *
286 */
287
288 /*
289 * XXX Most SCSI boards use this mapping, I could be incorrect. Some one
290 * using hard disks on a trantor should verify that this mapping corresponds
291 * to that used by the BIOS / ASPI driver by running the linux fdisk program
292 * and matching the H_C_S coordinates to what DOS uses.
293 */
294
295 int t128_biosparam(int size, int dev, int * ip)
/* ![[previous]](../icons/left.png)
*/
296 {
297 ip[0] = 64;
298 ip[1] = 32;
299 ip[2] = size >> 11;
300 return 0;
301 }
302
303 /*
304 * Function : int NCR5380_pread (struct Scsi_Host *instance,
305 * unsigned char *dst, int len)
306 *
307 * Purpose : Fast 5380 pseudo-dma read function, transfers len bytes to
308 * dst
309 *
310 * Inputs : dst = destination, len = length in bytes
311 *
312 * Returns : 0 on success, non zero on a failure such as a watchdog
313 * timeout.
314 */
315
316 static inline int NCR5380_pread (struct Scsi_Host *instance, unsigned char *dst,
/* */
317 int len) {
318 register unsigned char *reg = (unsigned char *) (instance->base +
319 T_DATA_REG_OFFSET), *d = dst;
320 register i = len;
321
322 while (!(instance->base[T_STATUS_REG_OFFSET]) & T_ST_RDY);
323
324 for (; i; --i)
325 *d++ = *reg;
326
327 if (*(instance->base + T_STATUS_REG_OFFSET) & T_ST_TIM) {
328 unsigned char tmp;
329 volatile unsigned char *foo;
330 foo = instance->base + T_CONTROL_REG_OFFSET;
331 tmp = *foo;
332 *foo = tmp | T_CR_CT;
333 *foo = tmp;
334 printk("scsi%d : watchdog timer fired in NCR5480_pread()\n",
335 instance->host_no);
336 return -1;
337 } else
338 return 0;
339 }
340
341 /*
342 * Function : int NCR5380_pwrite (struct Scsi_Host *instance,
343 * unsigned char *src, int len)
344 *
345 * Purpose : Fast 5380 pseudo-dma write function, transfers len bytes from
346 * src
347 *
348 * Inputs : src = source, len = length in bytes
349 *
350 * Returns : 0 on success, non zero on a failure such as a watchdog
351 * timeout.
352 */
353
354 static inline int NCR5380_pwrite (struct Scsi_Host *instance, unsigned char *src,
/* */
355 int len) {
356 register unsigned char *reg = (unsigned char *) (instance->base +
357 T_DATA_REG_OFFSET), *s = src;
358 register i = len;
359
360 while (!(instance->base[T_STATUS_REG_OFFSET]) & T_ST_RDY);
361 for (; i; --i)
362 *reg = *s++;
363
364 if (*(instance->base + T_STATUS_REG_OFFSET) & T_ST_TIM) {
365 unsigned char tmp;
366 volatile unsigned char *foo;
367 foo = instance->base + T_CONTROL_REG_OFFSET;
368 tmp = *foo;
369 *foo = tmp | T_CR_CT;
370 *foo = tmp;
371 printk("scsi%d : watchdog timer fired in NCR5480_pwrite()\n",
372 instance->host_no);
373 return -1;
374 } else
375 return 0;
376 }
377
378 /*
379 * Function : const char *t128_info(void)
380 *
381 * Purpose : provide furthur information about this driver.
382 *
383 * Returns : an empty string.
384 */
385
386 const char *t128_info (void) {
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*/
387 static const char string[]="";
388 return string;
389 }
390
391 #include "NCR5380.c"
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*/