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1.1 root 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: * [email protected]
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: * Revision 1.1.1.1 1997/02/25 21:27:53 thomas
108: * Initial source
109: *
110: * Revision 1.1.1.1 1996/10/30 01:40:07 thomas
111: * Imported from UK22
112: *
113: * Revision 1.1 1996/03/25 20:25:52 goel
114: * Linux driver merge.
115: *
116: */
117:
118: #include <asm/system.h>
119: #include <linux/signal.h>
120: #include <linux/sched.h>
121: #include <asm/io.h>
122: #include <linux/blk.h>
123: #include "scsi.h"
124: #include "hosts.h"
125: #include "t128.h"
126: #define AUTOPROBE_IRQ
127: #include "NCR5380.h"
128: #include "constants.h"
129: #include "sd.h"
130: #include<linux/stat.h>
131:
132: struct proc_dir_entry proc_scsi_t128 = {
133: PROC_SCSI_T128, 4, "t128",
134: S_IFDIR | S_IRUGO | S_IXUGO, 2
135: };
136:
137:
138: static struct override {
139: unsigned char *address;
140: int irq;
141: } overrides
142: #ifdef T128_OVERRIDE
143: [] = T128_OVERRIDE;
144: #else
145: [4] = {{NULL,IRQ_AUTO}, {NULL,IRQ_AUTO}, {NULL,IRQ_AUTO},
146: {NULL,IRQ_AUTO}};
147: #endif
148:
149: #define NO_OVERRIDES (sizeof(overrides) / sizeof(struct override))
150:
151: static struct base {
152: unsigned char *address;
153: int noauto;
154: } bases[] = {{(unsigned char *) 0xcc000, 0}, {(unsigned char *) 0xc8000, 0},
155: {(unsigned char *) 0xdc000, 0}, {(unsigned char *) 0xd8000, 0}};
156:
157: #define NO_BASES (sizeof (bases) / sizeof (struct base))
158:
159: static const struct signature {
160: const char *string;
161: int offset;
162: } signatures[] = {
163: {"TSROM: SCSI BIOS, Version 1.12", 0x36},
164: };
165:
166: #define NO_SIGNATURES (sizeof (signatures) / sizeof (struct signature))
167:
168: /*
169: * Function : t128_setup(char *str, int *ints)
170: *
171: * Purpose : LILO command line initialization of the overrides array,
172: *
173: * Inputs : str - unused, ints - array of integer parameters with ints[0]
174: * equal to the number of ints.
175: *
176: */
177:
178: void t128_setup(char *str, int *ints) {
179: static int commandline_current = 0;
180: int i;
181: if (ints[0] != 2)
182: printk("t128_setup : usage t128=address,irq\n");
183: else
184: if (commandline_current < NO_OVERRIDES) {
185: overrides[commandline_current].address = (unsigned char *) ints[1];
186: overrides[commandline_current].irq = ints[2];
187: for (i = 0; i < NO_BASES; ++i)
188: if (bases[i].address == (unsigned char *) ints[1]) {
189: bases[i].noauto = 1;
190: break;
191: }
192: ++commandline_current;
193: }
194: }
195:
196: /*
197: * Function : int t128_detect(Scsi_Host_Template * tpnt)
198: *
199: * Purpose : detects and initializes T128,T128F, or T228 controllers
200: * that were autoprobed, overridden on the LILO command line,
201: * or specified at compile time.
202: *
203: * Inputs : tpnt - template for this SCSI adapter.
204: *
205: * Returns : 1 if a host adapter was found, 0 if not.
206: *
207: */
208:
209: int t128_detect(Scsi_Host_Template * tpnt) {
210: static int current_override = 0, current_base = 0;
211: struct Scsi_Host *instance;
212: unsigned char *base;
213: int sig, count;
214:
215: tpnt->proc_dir = &proc_scsi_t128;
216:
217: for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
218: base = NULL;
219:
220: if (overrides[current_override].address)
221: base = overrides[current_override].address;
222: else
223: for (; !base && (current_base < NO_BASES); ++current_base) {
224: #if (TDEBUG & TDEBUG_INIT)
225: printk("scsi : probing address %08x\n", (unsigned int) bases[current_base].address);
226: #endif
227: for (sig = 0; sig < NO_SIGNATURES; ++sig)
228: if (!bases[current_base].noauto && !memcmp
229: (bases[current_base].address + signatures[sig].offset,
230: signatures[sig].string, 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: break;
236: }
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: instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata));
247: instance->base = base;
248:
249: NCR5380_init(instance, 0);
250:
251: if (overrides[current_override].irq != IRQ_AUTO)
252: instance->irq = overrides[current_override].irq;
253: else
254: instance->irq = NCR5380_probe_irq(instance, T128_IRQS);
255:
256: if (instance->irq != IRQ_NONE)
257: if (request_irq(instance->irq, t128_intr, SA_INTERRUPT, "t128")) {
258: printk("scsi%d : IRQ%d not free, interrupts disabled\n",
259: instance->host_no, instance->irq);
260: instance->irq = IRQ_NONE;
261: }
262:
263: if (instance->irq == IRQ_NONE) {
264: printk("scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
265: printk("scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
266: }
267:
268: #if defined(TDEBUG) && (TDEBUG & TDEBUG_INIT)
269: printk("scsi%d : irq = %d\n", instance->host_no, instance->irq);
270: #endif
271:
272: printk("scsi%d : at 0x%08x", instance->host_no, (int)
273: instance->base);
274: if (instance->irq == IRQ_NONE)
275: printk (" interrupts disabled");
276: else
277: printk (" irq %d", instance->irq);
278: printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d",
279: CAN_QUEUE, CMD_PER_LUN, T128_PUBLIC_RELEASE);
280: NCR5380_print_options(instance);
281: printk("\n");
282:
283: ++current_override;
284: ++count;
285: }
286: return count;
287: }
288:
289: /*
290: * Function : int t128_biosparam(Disk * disk, kdev_t dev, int *ip)
291: *
292: * Purpose : Generates a BIOS / DOS compatible H-C-S mapping for
293: * the specified device / size.
294: *
295: * Inputs : size = size of device in sectors (512 bytes), dev = block device
296: * major / minor, ip[] = {heads, sectors, cylinders}
297: *
298: * Returns : always 0 (success), initializes ip
299: *
300: */
301:
302: /*
303: * XXX Most SCSI boards use this mapping, I could be incorrect. Some one
304: * using hard disks on a trantor should verify that this mapping corresponds
305: * to that used by the BIOS / ASPI driver by running the linux fdisk program
306: * and matching the H_C_S coordinates to what DOS uses.
307: */
308:
309: int t128_biosparam(Disk * disk, kdev_t dev, int * ip)
310: {
311: int size = disk->capacity;
312: ip[0] = 64;
313: ip[1] = 32;
314: ip[2] = size >> 11;
315: return 0;
316: }
317:
318: /*
319: * Function : int NCR5380_pread (struct Scsi_Host *instance,
320: * unsigned char *dst, int len)
321: *
322: * Purpose : Fast 5380 pseudo-dma read function, transfers len bytes to
323: * dst
324: *
325: * Inputs : dst = destination, len = length in bytes
326: *
327: * Returns : 0 on success, non zero on a failure such as a watchdog
328: * timeout.
329: */
330:
331: static inline int NCR5380_pread (struct Scsi_Host *instance, unsigned char *dst,
332: int len) {
333: register unsigned char *reg = (unsigned char *) (instance->base +
334: T_DATA_REG_OFFSET), *d = dst;
335: register i = len;
336:
337:
338: #if 0
339: for (; i; --i) {
340: while (!(instance->base[T_STATUS_REG_OFFSET]) & T_ST_RDY) barrier();
341: #else
342: while (!(instance->base[T_STATUS_REG_OFFSET]) & T_ST_RDY) barrier();
343: for (; i; --i) {
344: #endif
345: *d++ = *reg;
346: }
347:
348: if (*(instance->base + T_STATUS_REG_OFFSET) & T_ST_TIM) {
349: unsigned char tmp;
350: volatile unsigned char *foo;
351: foo = instance->base + T_CONTROL_REG_OFFSET;
352: tmp = *foo;
353: *foo = tmp | T_CR_CT;
354: *foo = tmp;
355: printk("scsi%d : watchdog timer fired in NCR5380_pread()\n",
356: instance->host_no);
357: return -1;
358: } else
359: return 0;
360: }
361:
362: /*
363: * Function : int NCR5380_pwrite (struct Scsi_Host *instance,
364: * unsigned char *src, int len)
365: *
366: * Purpose : Fast 5380 pseudo-dma write function, transfers len bytes from
367: * src
368: *
369: * Inputs : src = source, len = length in bytes
370: *
371: * Returns : 0 on success, non zero on a failure such as a watchdog
372: * timeout.
373: */
374:
375: static inline int NCR5380_pwrite (struct Scsi_Host *instance, unsigned char *src,
376: int len) {
377: register unsigned char *reg = (unsigned char *) (instance->base +
378: T_DATA_REG_OFFSET), *s = src;
379: register i = len;
380:
381: #if 0
382: for (; i; --i) {
383: while (!(instance->base[T_STATUS_REG_OFFSET]) & T_ST_RDY) barrier();
384: #else
385: while (!(instance->base[T_STATUS_REG_OFFSET]) & T_ST_RDY) barrier();
386: for (; i; --i) {
387: #endif
388: *reg = *s++;
389: }
390:
391: if (*(instance->base + T_STATUS_REG_OFFSET) & T_ST_TIM) {
392: unsigned char tmp;
393: volatile unsigned char *foo;
394: foo = instance->base + T_CONTROL_REG_OFFSET;
395: tmp = *foo;
396: *foo = tmp | T_CR_CT;
397: *foo = tmp;
398: printk("scsi%d : watchdog timer fired in NCR5380_pwrite()\n",
399: instance->host_no);
400: return -1;
401: } else
402: return 0;
403: }
404:
405: #ifdef MACH
406: #include "NCR5380.src"
407: #else
408: #include "NCR5380.c"
409: #endif
410:
411: #ifdef MODULE
412: /* Eventually this will go into an include file, but this will be later */
413: Scsi_Host_Template driver_template = TRANTOR_T128;
414:
415: #include "scsi_module.c"
416: #endif
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