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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 tuples. 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/io.h> |
112 | #include <linux/blkdev.h> |
113 | #include <linux/interrupt.h> |
114 | #include <linux/stat.h> |
115 | #include <linux/init.h> |
116 | #include <linux/module.h> |
117 | #include <linux/delay.h> |
118 | |
119 | #include "scsi.h" |
120 | #include <scsi/scsi_host.h> |
121 | #include "t128.h" |
122 | #define AUTOPROBE_IRQ |
123 | #include "NCR5380.h" |
124 | |
125 | static struct override { |
126 | unsigned long address; |
127 | int irq; |
128 | } overrides |
129 | #ifdef T128_OVERRIDE |
130 | [] __initdata = T128_OVERRIDE; |
131 | #else |
132 | [4] __initdata = {{0, IRQ_AUTO}, {0, IRQ_AUTO}, |
133 | {0 ,IRQ_AUTO}, {0, IRQ_AUTO}}; |
134 | #endif |
135 | |
136 | #define NO_OVERRIDES ARRAY_SIZE(overrides) |
137 | |
138 | static struct base { |
139 | unsigned int address; |
140 | int noauto; |
141 | } bases[] __initdata = { |
142 | { 0xcc000, 0}, { 0xc8000, 0}, { 0xdc000, 0}, { 0xd8000, 0} |
143 | }; |
144 | |
145 | #define NO_BASES ARRAY_SIZE(bases) |
146 | |
147 | static struct signature { |
148 | const char *string; |
149 | int offset; |
150 | } signatures[] __initdata = { |
151 | {"TSROM: SCSI BIOS, Version 1.12", 0x36}, |
152 | }; |
153 | |
154 | #define NO_SIGNATURES ARRAY_SIZE(signatures) |
155 | |
156 | /* |
157 | * Function : t128_setup(char *str, int *ints) |
158 | * |
159 | * Purpose : LILO command line initialization of the overrides array, |
160 | * |
161 | * Inputs : str - unused, ints - array of integer parameters with ints[0] |
162 | * equal to the number of ints. |
163 | * |
164 | */ |
165 | |
166 | void __init t128_setup(char *str, int *ints){ |
167 | static int commandline_current = 0; |
168 | int i; |
169 | if (ints[0] != 2) |
170 | printk("t128_setup : usage t128=address,irq\n"); |
171 | else |
172 | if (commandline_current < NO_OVERRIDES) { |
173 | overrides[commandline_current].address = ints[1]; |
174 | overrides[commandline_current].irq = ints[2]; |
175 | for (i = 0; i < NO_BASES; ++i) |
176 | if (bases[i].address == ints[1]) { |
177 | bases[i].noauto = 1; |
178 | break; |
179 | } |
180 | ++commandline_current; |
181 | } |
182 | } |
183 | |
184 | /* |
185 | * Function : int t128_detect(struct scsi_host_template * tpnt) |
186 | * |
187 | * Purpose : detects and initializes T128,T128F, or T228 controllers |
188 | * that were autoprobed, overridden on the LILO command line, |
189 | * or specified at compile time. |
190 | * |
191 | * Inputs : tpnt - template for this SCSI adapter. |
192 | * |
193 | * Returns : 1 if a host adapter was found, 0 if not. |
194 | * |
195 | */ |
196 | |
197 | int __init t128_detect(struct scsi_host_template * tpnt){ |
198 | static int current_override = 0, current_base = 0; |
199 | struct Scsi_Host *instance; |
200 | unsigned long base; |
201 | void __iomem *p; |
202 | int sig, count; |
203 | |
204 | tpnt->proc_name = "t128"; |
205 | tpnt->proc_info = &t128_proc_info; |
206 | |
207 | for (count = 0; current_override < NO_OVERRIDES; ++current_override) { |
208 | base = 0; |
209 | p = NULL; |
210 | |
211 | if (overrides[current_override].address) { |
212 | base = overrides[current_override].address; |
213 | p = ioremap(bases[current_base].address, 0x2000); |
214 | if (!p) |
215 | base = 0; |
216 | } else |
217 | for (; !base && (current_base < NO_BASES); ++current_base) { |
218 | #if (TDEBUG & TDEBUG_INIT) |
219 | printk("scsi-t128 : probing address %08x\n", bases[current_base].address); |
220 | #endif |
221 | if (bases[current_base].noauto) |
222 | continue; |
223 | p = ioremap(bases[current_base].address, 0x2000); |
224 | if (!p) |
225 | continue; |
226 | for (sig = 0; sig < NO_SIGNATURES; ++sig) |
227 | if (check_signature(p + signatures[sig].offset, |
228 | signatures[sig].string, |
229 | strlen(signatures[sig].string))) { |
230 | base = bases[current_base].address; |
231 | #if (TDEBUG & TDEBUG_INIT) |
232 | printk("scsi-t128 : detected board.\n"); |
233 | #endif |
234 | goto found; |
235 | } |
236 | iounmap(p); |
237 | } |
238 | |
239 | #if defined(TDEBUG) && (TDEBUG & TDEBUG_INIT) |
240 | printk("scsi-t128 : base = %08x\n", (unsigned int) base); |
241 | #endif |
242 | |
243 | if (!base) |
244 | break; |
245 | |
246 | found: |
247 | instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata)); |
248 | if(instance == NULL) |
249 | break; |
250 | |
251 | instance->base = base; |
252 | ((struct NCR5380_hostdata *)instance->hostdata)->base = p; |
253 | |
254 | NCR5380_init(instance, 0); |
255 | |
256 | if (overrides[current_override].irq != IRQ_AUTO) |
257 | instance->irq = overrides[current_override].irq; |
258 | else |
259 | instance->irq = NCR5380_probe_irq(instance, T128_IRQS); |
260 | |
261 | if (instance->irq != SCSI_IRQ_NONE) |
262 | if (request_irq(instance->irq, t128_intr, IRQF_DISABLED, "t128", |
263 | instance)) { |
264 | printk("scsi%d : IRQ%d not free, interrupts disabled\n", |
265 | instance->host_no, instance->irq); |
266 | instance->irq = SCSI_IRQ_NONE; |
267 | } |
268 | |
269 | if (instance->irq == SCSI_IRQ_NONE) { |
270 | printk("scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no); |
271 | printk("scsi%d : please jumper the board for a free IRQ.\n", instance->host_no); |
272 | } |
273 | |
274 | #if defined(TDEBUG) && (TDEBUG & TDEBUG_INIT) |
275 | printk("scsi%d : irq = %d\n", instance->host_no, instance->irq); |
276 | #endif |
277 | |
278 | printk("scsi%d : at 0x%08lx", instance->host_no, instance->base); |
279 | if (instance->irq == SCSI_IRQ_NONE) |
280 | printk (" interrupts disabled"); |
281 | else |
282 | printk (" irq %d", instance->irq); |
283 | printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d", |
284 | CAN_QUEUE, CMD_PER_LUN, T128_PUBLIC_RELEASE); |
285 | NCR5380_print_options(instance); |
286 | printk("\n"); |
287 | |
288 | ++current_override; |
289 | ++count; |
290 | } |
291 | return count; |
292 | } |
293 | |
294 | static int t128_release(struct Scsi_Host *shost) |
295 | { |
296 | NCR5380_local_declare(); |
297 | NCR5380_setup(shost); |
298 | if (shost->irq) |
299 | free_irq(shost->irq, shost); |
300 | NCR5380_exit(shost); |
301 | if (shost->io_port && shost->n_io_port) |
302 | release_region(shost->io_port, shost->n_io_port); |
303 | scsi_unregister(shost); |
304 | iounmap(base); |
305 | return 0; |
306 | } |
307 | |
308 | /* |
309 | * Function : int t128_biosparam(Disk * disk, struct block_device *dev, int *ip) |
310 | * |
311 | * Purpose : Generates a BIOS / DOS compatible H-C-S mapping for |
312 | * the specified device / size. |
313 | * |
314 | * Inputs : size = size of device in sectors (512 bytes), dev = block device |
315 | * major / minor, ip[] = {heads, sectors, cylinders} |
316 | * |
317 | * Returns : always 0 (success), initializes ip |
318 | * |
319 | */ |
320 | |
321 | /* |
322 | * XXX Most SCSI boards use this mapping, I could be incorrect. Some one |
323 | * using hard disks on a trantor should verify that this mapping corresponds |
324 | * to that used by the BIOS / ASPI driver by running the linux fdisk program |
325 | * and matching the H_C_S coordinates to what DOS uses. |
326 | */ |
327 | |
328 | int t128_biosparam(struct scsi_device *sdev, struct block_device *bdev, |
329 | sector_t capacity, int * ip) |
330 | { |
331 | ip[0] = 64; |
332 | ip[1] = 32; |
333 | ip[2] = capacity >> 11; |
334 | return 0; |
335 | } |
336 | |
337 | /* |
338 | * Function : int NCR5380_pread (struct Scsi_Host *instance, |
339 | * unsigned char *dst, int len) |
340 | * |
341 | * Purpose : Fast 5380 pseudo-dma read function, transfers len bytes to |
342 | * dst |
343 | * |
344 | * Inputs : dst = destination, len = length in bytes |
345 | * |
346 | * Returns : 0 on success, non zero on a failure such as a watchdog |
347 | * timeout. |
348 | */ |
349 | |
350 | static inline int NCR5380_pread (struct Scsi_Host *instance, unsigned char *dst, |
351 | int len) { |
352 | NCR5380_local_declare(); |
353 | void __iomem *reg; |
354 | unsigned char *d = dst; |
355 | register int i = len; |
356 | |
357 | NCR5380_setup(instance); |
358 | reg = base + T_DATA_REG_OFFSET; |
359 | |
360 | #if 0 |
361 | for (; i; --i) { |
362 | while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier(); |
363 | #else |
364 | while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier(); |
365 | for (; i; --i) { |
366 | #endif |
367 | *d++ = readb(reg); |
368 | } |
369 | |
370 | if (readb(base + T_STATUS_REG_OFFSET) & T_ST_TIM) { |
371 | unsigned char tmp; |
372 | void __iomem *foo = base + T_CONTROL_REG_OFFSET; |
373 | tmp = readb(foo); |
374 | writeb(tmp | T_CR_CT, foo); |
375 | writeb(tmp, foo); |
376 | printk("scsi%d : watchdog timer fired in NCR5380_pread()\n", |
377 | instance->host_no); |
378 | return -1; |
379 | } else |
380 | return 0; |
381 | } |
382 | |
383 | /* |
384 | * Function : int NCR5380_pwrite (struct Scsi_Host *instance, |
385 | * unsigned char *src, int len) |
386 | * |
387 | * Purpose : Fast 5380 pseudo-dma write function, transfers len bytes from |
388 | * src |
389 | * |
390 | * Inputs : src = source, len = length in bytes |
391 | * |
392 | * Returns : 0 on success, non zero on a failure such as a watchdog |
393 | * timeout. |
394 | */ |
395 | |
396 | static inline int NCR5380_pwrite (struct Scsi_Host *instance, unsigned char *src, |
397 | int len) { |
398 | NCR5380_local_declare(); |
399 | void __iomem *reg; |
400 | unsigned char *s = src; |
401 | register int i = len; |
402 | |
403 | NCR5380_setup(instance); |
404 | reg = base + T_DATA_REG_OFFSET; |
405 | |
406 | #if 0 |
407 | for (; i; --i) { |
408 | while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier(); |
409 | #else |
410 | while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier(); |
411 | for (; i; --i) { |
412 | #endif |
413 | writeb(*s++, reg); |
414 | } |
415 | |
416 | if (readb(base + T_STATUS_REG_OFFSET) & T_ST_TIM) { |
417 | unsigned char tmp; |
418 | void __iomem *foo = base + T_CONTROL_REG_OFFSET; |
419 | tmp = readb(foo); |
420 | writeb(tmp | T_CR_CT, foo); |
421 | writeb(tmp, foo); |
422 | printk("scsi%d : watchdog timer fired in NCR5380_pwrite()\n", |
423 | instance->host_no); |
424 | return -1; |
425 | } else |
426 | return 0; |
427 | } |
428 | |
429 | MODULE_LICENSE("GPL"); |
430 | |
431 | #include "NCR5380.c" |
432 | |
433 | static struct scsi_host_template driver_template = { |
434 | .name = "Trantor T128/T128F/T228", |
435 | .detect = t128_detect, |
436 | .release = t128_release, |
437 | .queuecommand = t128_queue_command, |
438 | .eh_abort_handler = t128_abort, |
439 | .eh_bus_reset_handler = t128_bus_reset, |
440 | .bios_param = t128_biosparam, |
441 | .can_queue = CAN_QUEUE, |
442 | .this_id = 7, |
443 | .sg_tablesize = SG_ALL, |
444 | .cmd_per_lun = CMD_PER_LUN, |
445 | .use_clustering = DISABLE_CLUSTERING, |
446 | }; |
447 | #include "scsi_module.c" |
448 |
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