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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. | |
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 | ||
1da177e4 | 105 | #include <linux/signal.h> |
53d5ed62 | 106 | #include <linux/io.h> |
1da177e4 LT |
107 | #include <linux/blkdev.h> |
108 | #include <linux/interrupt.h> | |
109 | #include <linux/stat.h> | |
110 | #include <linux/init.h> | |
111 | #include <linux/module.h> | |
112 | #include <linux/delay.h> | |
113 | ||
114 | #include "scsi.h" | |
115 | #include <scsi/scsi_host.h> | |
116 | #include "t128.h" | |
117 | #define AUTOPROBE_IRQ | |
118 | #include "NCR5380.h" | |
119 | ||
120 | static struct override { | |
121 | unsigned long address; | |
122 | int irq; | |
6391a113 | 123 | } overrides |
1da177e4 LT |
124 | #ifdef T128_OVERRIDE |
125 | [] __initdata = T128_OVERRIDE; | |
126 | #else | |
6391a113 | 127 | [4] __initdata = {{0, IRQ_AUTO}, {0, IRQ_AUTO}, |
1da177e4 LT |
128 | {0 ,IRQ_AUTO}, {0, IRQ_AUTO}}; |
129 | #endif | |
130 | ||
6391a113 | 131 | #define NO_OVERRIDES ARRAY_SIZE(overrides) |
1da177e4 LT |
132 | |
133 | static struct base { | |
134 | unsigned int address; | |
135 | int noauto; | |
136 | } bases[] __initdata = { | |
137 | { 0xcc000, 0}, { 0xc8000, 0}, { 0xdc000, 0}, { 0xd8000, 0} | |
138 | }; | |
139 | ||
6391a113 | 140 | #define NO_BASES ARRAY_SIZE(bases) |
1da177e4 LT |
141 | |
142 | static struct signature { | |
143 | const char *string; | |
144 | int offset; | |
145 | } signatures[] __initdata = { | |
146 | {"TSROM: SCSI BIOS, Version 1.12", 0x36}, | |
147 | }; | |
148 | ||
6391a113 | 149 | #define NO_SIGNATURES ARRAY_SIZE(signatures) |
1da177e4 LT |
150 | |
151 | /* | |
152 | * Function : t128_setup(char *str, int *ints) | |
153 | * | |
154 | * Purpose : LILO command line initialization of the overrides array, | |
155 | * | |
156 | * Inputs : str - unused, ints - array of integer parameters with ints[0] | |
157 | * equal to the number of ints. | |
158 | * | |
159 | */ | |
160 | ||
161 | void __init t128_setup(char *str, int *ints){ | |
162 | static int commandline_current = 0; | |
163 | int i; | |
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 | } | |
177 | } | |
178 | ||
179 | /* | |
d0be4a7d | 180 | * Function : int t128_detect(struct scsi_host_template * tpnt) |
1da177e4 LT |
181 | * |
182 | * Purpose : detects and initializes T128,T128F, or T228 controllers | |
183 | * that were autoprobed, overridden on the LILO command line, | |
184 | * or specified at compile time. | |
185 | * | |
186 | * Inputs : tpnt - template for this SCSI adapter. | |
187 | * | |
188 | * Returns : 1 if a host adapter was found, 0 if not. | |
189 | * | |
190 | */ | |
191 | ||
d0be4a7d | 192 | int __init t128_detect(struct scsi_host_template * tpnt){ |
1da177e4 LT |
193 | static int current_override = 0, current_base = 0; |
194 | struct Scsi_Host *instance; | |
195 | unsigned long base; | |
196 | void __iomem *p; | |
197 | int sig, count; | |
198 | ||
199 | tpnt->proc_name = "t128"; | |
dd7ab71b AV |
200 | tpnt->show_info = t128_show_info; |
201 | tpnt->write_info = t128_write_info; | |
1da177e4 LT |
202 | |
203 | for (count = 0; current_override < NO_OVERRIDES; ++current_override) { | |
204 | base = 0; | |
205 | p = NULL; | |
206 | ||
207 | if (overrides[current_override].address) { | |
208 | base = overrides[current_override].address; | |
209 | p = ioremap(bases[current_base].address, 0x2000); | |
210 | if (!p) | |
211 | base = 0; | |
212 | } else | |
213 | for (; !base && (current_base < NO_BASES); ++current_base) { | |
214 | #if (TDEBUG & TDEBUG_INIT) | |
215 | printk("scsi-t128 : probing address %08x\n", bases[current_base].address); | |
216 | #endif | |
217 | if (bases[current_base].noauto) | |
218 | continue; | |
219 | p = ioremap(bases[current_base].address, 0x2000); | |
220 | if (!p) | |
221 | continue; | |
222 | for (sig = 0; sig < NO_SIGNATURES; ++sig) | |
223 | if (check_signature(p + signatures[sig].offset, | |
224 | signatures[sig].string, | |
225 | strlen(signatures[sig].string))) { | |
226 | base = bases[current_base].address; | |
227 | #if (TDEBUG & TDEBUG_INIT) | |
228 | printk("scsi-t128 : detected board.\n"); | |
229 | #endif | |
230 | goto found; | |
231 | } | |
232 | iounmap(p); | |
233 | } | |
234 | ||
235 | #if defined(TDEBUG) && (TDEBUG & TDEBUG_INIT) | |
236 | printk("scsi-t128 : base = %08x\n", (unsigned int) base); | |
237 | #endif | |
238 | ||
239 | if (!base) | |
240 | break; | |
241 | ||
242 | found: | |
243 | instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata)); | |
244 | if(instance == NULL) | |
245 | break; | |
246 | ||
247 | instance->base = base; | |
248 | ((struct NCR5380_hostdata *)instance->hostdata)->base = p; | |
249 | ||
250 | NCR5380_init(instance, 0); | |
251 | ||
252 | if (overrides[current_override].irq != IRQ_AUTO) | |
253 | instance->irq = overrides[current_override].irq; | |
254 | else | |
255 | instance->irq = NCR5380_probe_irq(instance, T128_IRQS); | |
256 | ||
257 | if (instance->irq != SCSI_IRQ_NONE) | |
4909cc2b | 258 | if (request_irq(instance->irq, t128_intr, 0, "t128", |
1e641664 | 259 | instance)) { |
1da177e4 LT |
260 | printk("scsi%d : IRQ%d not free, interrupts disabled\n", |
261 | instance->host_no, instance->irq); | |
262 | instance->irq = SCSI_IRQ_NONE; | |
263 | } | |
264 | ||
265 | if (instance->irq == SCSI_IRQ_NONE) { | |
266 | printk("scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no); | |
267 | printk("scsi%d : please jumper the board for a free IRQ.\n", instance->host_no); | |
268 | } | |
269 | ||
270 | #if defined(TDEBUG) && (TDEBUG & TDEBUG_INIT) | |
271 | printk("scsi%d : irq = %d\n", instance->host_no, instance->irq); | |
272 | #endif | |
273 | ||
274 | printk("scsi%d : at 0x%08lx", instance->host_no, instance->base); | |
275 | if (instance->irq == SCSI_IRQ_NONE) | |
276 | printk (" interrupts disabled"); | |
277 | else | |
278 | printk (" irq %d", instance->irq); | |
279 | printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d", | |
280 | CAN_QUEUE, CMD_PER_LUN, T128_PUBLIC_RELEASE); | |
281 | NCR5380_print_options(instance); | |
282 | printk("\n"); | |
283 | ||
284 | ++current_override; | |
285 | ++count; | |
286 | } | |
287 | return count; | |
288 | } | |
289 | ||
290 | static int t128_release(struct Scsi_Host *shost) | |
291 | { | |
292 | NCR5380_local_declare(); | |
293 | NCR5380_setup(shost); | |
294 | if (shost->irq) | |
1e641664 | 295 | free_irq(shost->irq, shost); |
1da177e4 LT |
296 | NCR5380_exit(shost); |
297 | if (shost->io_port && shost->n_io_port) | |
298 | release_region(shost->io_port, shost->n_io_port); | |
299 | scsi_unregister(shost); | |
300 | iounmap(base); | |
301 | return 0; | |
302 | } | |
303 | ||
304 | /* | |
305 | * Function : int t128_biosparam(Disk * disk, struct block_device *dev, int *ip) | |
306 | * | |
307 | * Purpose : Generates a BIOS / DOS compatible H-C-S mapping for | |
308 | * the specified device / size. | |
309 | * | |
310 | * Inputs : size = size of device in sectors (512 bytes), dev = block device | |
311 | * major / minor, ip[] = {heads, sectors, cylinders} | |
312 | * | |
313 | * Returns : always 0 (success), initializes ip | |
314 | * | |
315 | */ | |
316 | ||
317 | /* | |
318 | * XXX Most SCSI boards use this mapping, I could be incorrect. Some one | |
319 | * using hard disks on a trantor should verify that this mapping corresponds | |
320 | * to that used by the BIOS / ASPI driver by running the linux fdisk program | |
321 | * and matching the H_C_S coordinates to what DOS uses. | |
322 | */ | |
323 | ||
324 | int t128_biosparam(struct scsi_device *sdev, struct block_device *bdev, | |
325 | sector_t capacity, int * ip) | |
326 | { | |
327 | ip[0] = 64; | |
328 | ip[1] = 32; | |
329 | ip[2] = capacity >> 11; | |
330 | return 0; | |
331 | } | |
332 | ||
333 | /* | |
334 | * Function : int NCR5380_pread (struct Scsi_Host *instance, | |
335 | * unsigned char *dst, int len) | |
336 | * | |
337 | * Purpose : Fast 5380 pseudo-dma read function, transfers len bytes to | |
338 | * dst | |
339 | * | |
340 | * Inputs : dst = destination, len = length in bytes | |
341 | * | |
342 | * Returns : 0 on success, non zero on a failure such as a watchdog | |
343 | * timeout. | |
344 | */ | |
345 | ||
346 | static inline int NCR5380_pread (struct Scsi_Host *instance, unsigned char *dst, | |
347 | int len) { | |
348 | NCR5380_local_declare(); | |
349 | void __iomem *reg; | |
350 | unsigned char *d = dst; | |
351 | register int i = len; | |
352 | ||
353 | NCR5380_setup(instance); | |
354 | reg = base + T_DATA_REG_OFFSET; | |
355 | ||
356 | #if 0 | |
357 | for (; i; --i) { | |
358 | while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier(); | |
359 | #else | |
360 | while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier(); | |
361 | for (; i; --i) { | |
362 | #endif | |
363 | *d++ = readb(reg); | |
364 | } | |
365 | ||
366 | if (readb(base + T_STATUS_REG_OFFSET) & T_ST_TIM) { | |
367 | unsigned char tmp; | |
368 | void __iomem *foo = base + T_CONTROL_REG_OFFSET; | |
369 | tmp = readb(foo); | |
370 | writeb(tmp | T_CR_CT, foo); | |
371 | writeb(tmp, foo); | |
372 | printk("scsi%d : watchdog timer fired in NCR5380_pread()\n", | |
373 | instance->host_no); | |
374 | return -1; | |
375 | } else | |
376 | return 0; | |
377 | } | |
378 | ||
379 | /* | |
380 | * Function : int NCR5380_pwrite (struct Scsi_Host *instance, | |
381 | * unsigned char *src, int len) | |
382 | * | |
383 | * Purpose : Fast 5380 pseudo-dma write function, transfers len bytes from | |
384 | * src | |
385 | * | |
386 | * Inputs : src = source, len = length in bytes | |
387 | * | |
388 | * Returns : 0 on success, non zero on a failure such as a watchdog | |
389 | * timeout. | |
390 | */ | |
391 | ||
392 | static inline int NCR5380_pwrite (struct Scsi_Host *instance, unsigned char *src, | |
393 | int len) { | |
394 | NCR5380_local_declare(); | |
395 | void __iomem *reg; | |
396 | unsigned char *s = src; | |
397 | register int i = len; | |
398 | ||
399 | NCR5380_setup(instance); | |
400 | reg = base + T_DATA_REG_OFFSET; | |
401 | ||
402 | #if 0 | |
403 | for (; i; --i) { | |
404 | while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier(); | |
405 | #else | |
406 | while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier(); | |
407 | for (; i; --i) { | |
408 | #endif | |
409 | writeb(*s++, reg); | |
410 | } | |
411 | ||
412 | if (readb(base + T_STATUS_REG_OFFSET) & T_ST_TIM) { | |
413 | unsigned char tmp; | |
414 | void __iomem *foo = base + T_CONTROL_REG_OFFSET; | |
415 | tmp = readb(foo); | |
416 | writeb(tmp | T_CR_CT, foo); | |
417 | writeb(tmp, foo); | |
418 | printk("scsi%d : watchdog timer fired in NCR5380_pwrite()\n", | |
419 | instance->host_no); | |
420 | return -1; | |
421 | } else | |
422 | return 0; | |
423 | } | |
424 | ||
425 | MODULE_LICENSE("GPL"); | |
426 | ||
427 | #include "NCR5380.c" | |
428 | ||
d0be4a7d | 429 | static struct scsi_host_template driver_template = { |
1da177e4 LT |
430 | .name = "Trantor T128/T128F/T228", |
431 | .detect = t128_detect, | |
432 | .release = t128_release, | |
433 | .queuecommand = t128_queue_command, | |
434 | .eh_abort_handler = t128_abort, | |
435 | .eh_bus_reset_handler = t128_bus_reset, | |
1da177e4 LT |
436 | .bios_param = t128_biosparam, |
437 | .can_queue = CAN_QUEUE, | |
438 | .this_id = 7, | |
439 | .sg_tablesize = SG_ALL, | |
440 | .cmd_per_lun = CMD_PER_LUN, | |
441 | .use_clustering = DISABLE_CLUSTERING, | |
442 | }; | |
443 | #include "scsi_module.c" |