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1da177e4 LT |
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. | |
1da177e4 LT |
50 | * |
51 | * UNSAFE - leave interrupts enabled during pseudo-DMA transfers. You | |
52 | * only really want to use this if you're having a problem with | |
53 | * dropped characters during high speed communications, and even | |
54 | * then, you're going to be better off twiddling with transfersize. | |
55 | * | |
1da177e4 LT |
56 | * The card is detected and initialized in one of several ways : |
57 | * 1. Autoprobe (default) - since the board is memory mapped, | |
58 | * a BIOS signature is scanned for to locate the registers. | |
59 | * An interrupt is triggered to autoprobe for the interrupt | |
60 | * line. | |
61 | * | |
62 | * 2. With command line overrides - t128=address,irq may be | |
63 | * used on the LILO command line to override the defaults. | |
64 | * | |
65 | * 3. With the T128_OVERRIDE compile time define. This is | |
66 | * specified as an array of address, irq tuples. Ie, for | |
67 | * one board at the default 0xcc000 address, IRQ5, I could say | |
68 | * -DT128_OVERRIDE={{0xcc000, 5}} | |
69 | * | |
70 | * Note that if the override methods are used, place holders must | |
71 | * be specified for other boards in the system. | |
72 | * | |
73 | * T128/T128F jumper/dipswitch settings (note : on my sample, the switches | |
74 | * were epoxy'd shut, meaning I couldn't change the 0xcc000 base address) : | |
75 | * | |
76 | * T128 Sw7 Sw8 Sw6 = 0ws Sw5 = boot | |
77 | * T128F Sw6 Sw7 Sw5 = 0ws Sw4 = boot Sw8 = floppy disable | |
78 | * cc000 off off | |
79 | * c8000 off on | |
80 | * dc000 on off | |
81 | * d8000 on on | |
82 | * | |
83 | * | |
84 | * Interrupts | |
85 | * There is a 12 pin jumper block, jp1, numbered as follows : | |
86 | * T128 (JP1) T128F (J5) | |
87 | * 2 4 6 8 10 12 11 9 7 5 3 1 | |
88 | * 1 3 5 7 9 11 12 10 8 6 4 2 | |
89 | * | |
90 | * 3 2-4 | |
91 | * 5 1-3 | |
92 | * 7 3-5 | |
93 | * T128F only | |
94 | * 10 8-10 | |
95 | * 12 7-9 | |
96 | * 14 10-12 | |
97 | * 15 9-11 | |
98 | */ | |
99 | ||
1da177e4 | 100 | #include <linux/signal.h> |
53d5ed62 | 101 | #include <linux/io.h> |
1da177e4 LT |
102 | #include <linux/blkdev.h> |
103 | #include <linux/interrupt.h> | |
104 | #include <linux/stat.h> | |
105 | #include <linux/init.h> | |
106 | #include <linux/module.h> | |
107 | #include <linux/delay.h> | |
108 | ||
109 | #include "scsi.h" | |
110 | #include <scsi/scsi_host.h> | |
111 | #include "t128.h" | |
112 | #define AUTOPROBE_IRQ | |
113 | #include "NCR5380.h" | |
114 | ||
115 | static struct override { | |
116 | unsigned long address; | |
117 | int irq; | |
6391a113 | 118 | } overrides |
1da177e4 LT |
119 | #ifdef T128_OVERRIDE |
120 | [] __initdata = T128_OVERRIDE; | |
121 | #else | |
6391a113 | 122 | [4] __initdata = {{0, IRQ_AUTO}, {0, IRQ_AUTO}, |
1da177e4 LT |
123 | {0 ,IRQ_AUTO}, {0, IRQ_AUTO}}; |
124 | #endif | |
125 | ||
6391a113 | 126 | #define NO_OVERRIDES ARRAY_SIZE(overrides) |
1da177e4 LT |
127 | |
128 | static struct base { | |
129 | unsigned int address; | |
130 | int noauto; | |
131 | } bases[] __initdata = { | |
132 | { 0xcc000, 0}, { 0xc8000, 0}, { 0xdc000, 0}, { 0xd8000, 0} | |
133 | }; | |
134 | ||
6391a113 | 135 | #define NO_BASES ARRAY_SIZE(bases) |
1da177e4 LT |
136 | |
137 | static struct signature { | |
138 | const char *string; | |
139 | int offset; | |
140 | } signatures[] __initdata = { | |
141 | {"TSROM: SCSI BIOS, Version 1.12", 0x36}, | |
142 | }; | |
143 | ||
6391a113 | 144 | #define NO_SIGNATURES ARRAY_SIZE(signatures) |
1da177e4 | 145 | |
925e4610 | 146 | #ifndef MODULE |
1da177e4 LT |
147 | /* |
148 | * Function : t128_setup(char *str, int *ints) | |
149 | * | |
150 | * Purpose : LILO command line initialization of the overrides array, | |
151 | * | |
152 | * Inputs : str - unused, ints - array of integer parameters with ints[0] | |
153 | * equal to the number of ints. | |
154 | * | |
155 | */ | |
156 | ||
925e4610 FT |
157 | static int __init t128_setup(char *str) |
158 | { | |
1da177e4 LT |
159 | static int commandline_current = 0; |
160 | int i; | |
925e4610 FT |
161 | int ints[10]; |
162 | ||
163 | get_options(str, ARRAY_SIZE(ints), ints); | |
1da177e4 LT |
164 | if (ints[0] != 2) |
165 | printk("t128_setup : usage t128=address,irq\n"); | |
166 | else | |
167 | if (commandline_current < NO_OVERRIDES) { | |
168 | overrides[commandline_current].address = ints[1]; | |
169 | overrides[commandline_current].irq = ints[2]; | |
170 | for (i = 0; i < NO_BASES; ++i) | |
171 | if (bases[i].address == ints[1]) { | |
172 | bases[i].noauto = 1; | |
173 | break; | |
174 | } | |
175 | ++commandline_current; | |
176 | } | |
925e4610 | 177 | return 1; |
1da177e4 LT |
178 | } |
179 | ||
925e4610 FT |
180 | __setup("t128=", t128_setup); |
181 | #endif | |
182 | ||
1da177e4 | 183 | /* |
d0be4a7d | 184 | * Function : int t128_detect(struct scsi_host_template * tpnt) |
1da177e4 LT |
185 | * |
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. | |
189 | * | |
190 | * Inputs : tpnt - template for this SCSI adapter. | |
191 | * | |
192 | * Returns : 1 if a host adapter was found, 0 if not. | |
193 | * | |
194 | */ | |
195 | ||
ed8b9e7f FT |
196 | static int __init t128_detect(struct scsi_host_template *tpnt) |
197 | { | |
1da177e4 LT |
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"; | |
dd7ab71b AV |
205 | tpnt->show_info = t128_show_info; |
206 | tpnt->write_info = t128_write_info; | |
1da177e4 LT |
207 | |
208 | for (count = 0; current_override < NO_OVERRIDES; ++current_override) { | |
209 | base = 0; | |
210 | p = NULL; | |
211 | ||
212 | if (overrides[current_override].address) { | |
213 | base = overrides[current_override].address; | |
214 | p = ioremap(bases[current_base].address, 0x2000); | |
215 | if (!p) | |
216 | base = 0; | |
217 | } else | |
218 | for (; !base && (current_base < NO_BASES); ++current_base) { | |
219 | #if (TDEBUG & TDEBUG_INIT) | |
220 | printk("scsi-t128 : probing address %08x\n", bases[current_base].address); | |
221 | #endif | |
222 | if (bases[current_base].noauto) | |
223 | continue; | |
224 | p = ioremap(bases[current_base].address, 0x2000); | |
225 | if (!p) | |
226 | continue; | |
227 | for (sig = 0; sig < NO_SIGNATURES; ++sig) | |
228 | if (check_signature(p + signatures[sig].offset, | |
229 | signatures[sig].string, | |
230 | strlen(signatures[sig].string))) { | |
231 | base = bases[current_base].address; | |
232 | #if (TDEBUG & TDEBUG_INIT) | |
233 | printk("scsi-t128 : detected board.\n"); | |
234 | #endif | |
235 | goto found; | |
236 | } | |
237 | iounmap(p); | |
238 | } | |
239 | ||
240 | #if defined(TDEBUG) && (TDEBUG & TDEBUG_INIT) | |
241 | printk("scsi-t128 : base = %08x\n", (unsigned int) base); | |
242 | #endif | |
243 | ||
244 | if (!base) | |
245 | break; | |
246 | ||
247 | found: | |
248 | instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata)); | |
249 | if(instance == NULL) | |
250 | break; | |
251 | ||
252 | instance->base = base; | |
253 | ((struct NCR5380_hostdata *)instance->hostdata)->base = p; | |
254 | ||
255 | NCR5380_init(instance, 0); | |
256 | ||
257 | if (overrides[current_override].irq != IRQ_AUTO) | |
258 | instance->irq = overrides[current_override].irq; | |
259 | else | |
260 | instance->irq = NCR5380_probe_irq(instance, T128_IRQS); | |
261 | ||
262 | if (instance->irq != SCSI_IRQ_NONE) | |
4909cc2b | 263 | if (request_irq(instance->irq, t128_intr, 0, "t128", |
1e641664 | 264 | instance)) { |
1da177e4 LT |
265 | printk("scsi%d : IRQ%d not free, interrupts disabled\n", |
266 | instance->host_no, instance->irq); | |
267 | instance->irq = SCSI_IRQ_NONE; | |
268 | } | |
269 | ||
270 | if (instance->irq == SCSI_IRQ_NONE) { | |
271 | printk("scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no); | |
272 | printk("scsi%d : please jumper the board for a free IRQ.\n", instance->host_no); | |
273 | } | |
274 | ||
275 | #if defined(TDEBUG) && (TDEBUG & TDEBUG_INIT) | |
276 | printk("scsi%d : irq = %d\n", instance->host_no, instance->irq); | |
277 | #endif | |
278 | ||
279 | printk("scsi%d : at 0x%08lx", instance->host_no, instance->base); | |
280 | if (instance->irq == SCSI_IRQ_NONE) | |
281 | printk (" interrupts disabled"); | |
282 | else | |
283 | printk (" irq %d", instance->irq); | |
284 | printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d", | |
285 | CAN_QUEUE, CMD_PER_LUN, T128_PUBLIC_RELEASE); | |
286 | NCR5380_print_options(instance); | |
287 | printk("\n"); | |
288 | ||
289 | ++current_override; | |
290 | ++count; | |
291 | } | |
292 | return count; | |
293 | } | |
294 | ||
295 | static int t128_release(struct Scsi_Host *shost) | |
296 | { | |
297 | NCR5380_local_declare(); | |
298 | NCR5380_setup(shost); | |
299 | if (shost->irq) | |
1e641664 | 300 | free_irq(shost->irq, shost); |
1da177e4 LT |
301 | NCR5380_exit(shost); |
302 | if (shost->io_port && shost->n_io_port) | |
303 | release_region(shost->io_port, shost->n_io_port); | |
304 | scsi_unregister(shost); | |
305 | iounmap(base); | |
306 | return 0; | |
307 | } | |
308 | ||
309 | /* | |
310 | * Function : int t128_biosparam(Disk * disk, struct block_device *dev, int *ip) | |
311 | * | |
312 | * Purpose : Generates a BIOS / DOS compatible H-C-S mapping for | |
313 | * the specified device / size. | |
314 | * | |
315 | * Inputs : size = size of device in sectors (512 bytes), dev = block device | |
316 | * major / minor, ip[] = {heads, sectors, cylinders} | |
317 | * | |
318 | * Returns : always 0 (success), initializes ip | |
319 | * | |
320 | */ | |
321 | ||
322 | /* | |
323 | * XXX Most SCSI boards use this mapping, I could be incorrect. Some one | |
324 | * using hard disks on a trantor should verify that this mapping corresponds | |
325 | * to that used by the BIOS / ASPI driver by running the linux fdisk program | |
326 | * and matching the H_C_S coordinates to what DOS uses. | |
327 | */ | |
328 | ||
ed8b9e7f FT |
329 | static int t128_biosparam(struct scsi_device *sdev, struct block_device *bdev, |
330 | sector_t capacity, int *ip) | |
1da177e4 LT |
331 | { |
332 | ip[0] = 64; | |
333 | ip[1] = 32; | |
334 | ip[2] = capacity >> 11; | |
335 | return 0; | |
336 | } | |
337 | ||
338 | /* | |
339 | * Function : int NCR5380_pread (struct Scsi_Host *instance, | |
340 | * unsigned char *dst, int len) | |
341 | * | |
342 | * Purpose : Fast 5380 pseudo-dma read function, transfers len bytes to | |
343 | * dst | |
344 | * | |
345 | * Inputs : dst = destination, len = length in bytes | |
346 | * | |
347 | * Returns : 0 on success, non zero on a failure such as a watchdog | |
348 | * timeout. | |
349 | */ | |
350 | ||
351 | static inline int NCR5380_pread (struct Scsi_Host *instance, unsigned char *dst, | |
352 | int len) { | |
353 | NCR5380_local_declare(); | |
354 | void __iomem *reg; | |
355 | unsigned char *d = dst; | |
356 | register int i = len; | |
357 | ||
358 | NCR5380_setup(instance); | |
359 | reg = base + T_DATA_REG_OFFSET; | |
360 | ||
361 | #if 0 | |
362 | for (; i; --i) { | |
363 | while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier(); | |
364 | #else | |
365 | while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier(); | |
366 | for (; i; --i) { | |
367 | #endif | |
368 | *d++ = readb(reg); | |
369 | } | |
370 | ||
371 | if (readb(base + T_STATUS_REG_OFFSET) & T_ST_TIM) { | |
372 | unsigned char tmp; | |
373 | void __iomem *foo = base + T_CONTROL_REG_OFFSET; | |
374 | tmp = readb(foo); | |
375 | writeb(tmp | T_CR_CT, foo); | |
376 | writeb(tmp, foo); | |
377 | printk("scsi%d : watchdog timer fired in NCR5380_pread()\n", | |
378 | instance->host_no); | |
379 | return -1; | |
380 | } else | |
381 | return 0; | |
382 | } | |
383 | ||
384 | /* | |
385 | * Function : int NCR5380_pwrite (struct Scsi_Host *instance, | |
386 | * unsigned char *src, int len) | |
387 | * | |
388 | * Purpose : Fast 5380 pseudo-dma write function, transfers len bytes from | |
389 | * src | |
390 | * | |
391 | * Inputs : src = source, len = length in bytes | |
392 | * | |
393 | * Returns : 0 on success, non zero on a failure such as a watchdog | |
394 | * timeout. | |
395 | */ | |
396 | ||
397 | static inline int NCR5380_pwrite (struct Scsi_Host *instance, unsigned char *src, | |
398 | int len) { | |
399 | NCR5380_local_declare(); | |
400 | void __iomem *reg; | |
401 | unsigned char *s = src; | |
402 | register int i = len; | |
403 | ||
404 | NCR5380_setup(instance); | |
405 | reg = base + T_DATA_REG_OFFSET; | |
406 | ||
407 | #if 0 | |
408 | for (; i; --i) { | |
409 | while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier(); | |
410 | #else | |
411 | while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier(); | |
412 | for (; i; --i) { | |
413 | #endif | |
414 | writeb(*s++, reg); | |
415 | } | |
416 | ||
417 | if (readb(base + T_STATUS_REG_OFFSET) & T_ST_TIM) { | |
418 | unsigned char tmp; | |
419 | void __iomem *foo = base + T_CONTROL_REG_OFFSET; | |
420 | tmp = readb(foo); | |
421 | writeb(tmp | T_CR_CT, foo); | |
422 | writeb(tmp, foo); | |
423 | printk("scsi%d : watchdog timer fired in NCR5380_pwrite()\n", | |
424 | instance->host_no); | |
425 | return -1; | |
426 | } else | |
427 | return 0; | |
428 | } | |
429 | ||
430 | MODULE_LICENSE("GPL"); | |
431 | ||
432 | #include "NCR5380.c" | |
433 | ||
d0be4a7d | 434 | static struct scsi_host_template driver_template = { |
1da177e4 LT |
435 | .name = "Trantor T128/T128F/T228", |
436 | .detect = t128_detect, | |
437 | .release = t128_release, | |
438 | .queuecommand = t128_queue_command, | |
439 | .eh_abort_handler = t128_abort, | |
440 | .eh_bus_reset_handler = t128_bus_reset, | |
1da177e4 LT |
441 | .bios_param = t128_biosparam, |
442 | .can_queue = CAN_QUEUE, | |
443 | .this_id = 7, | |
444 | .sg_tablesize = SG_ALL, | |
445 | .cmd_per_lun = CMD_PER_LUN, | |
446 | .use_clustering = DISABLE_CLUSTERING, | |
447 | }; | |
448 | #include "scsi_module.c" |