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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 1999/04/26 05:55:08 tb
108: * 1998-11-30 OKUJI Yoshinori <[email protected]>
109: *
110: * Clean up linux emulation code to make it architecture-independent
111: * as much as possible.
112: *
113: * * linux: Renamed from linuxdev.
114: * * Makefile.in (objfiles): Add linux.o instead of linuxdev.o.
115: * (MAKE): New variable. Used for the linux.o target.
116: * * configure.in: Add AC_CHECK_TOOL(MAKE, make).
117: * * i386/i386/spl.h: Include <i386/ipl.h>, for compatibility with
118: * OSF Mach 3.0. Suggested by Elgin Lee <[email protected]>.
119: * * linux/src: Renamed from linux/linux.
120: * * linux/dev: Renamed from linux/mach.
121: * * linux/Drivers.in (AC_INIT): Use dev/include/linux/autoconf.h,
122: * instead of mach/include/linux/autoconf.h.
123: * * Makefile.in (all): Target ../linux.o instead of ../linuxdev.o.
124: * * linux/dev/drivers/block/genhd.c: Include <machine/spl.h> instead
125: * of <i386/ipl.h>.
126: * * linux/dev/drivers/net/auto_irq.c: Remove unneeded header files,
127: * <i386/ipl.h> and <i386/pic.h>.
128: * * linux/dev/init/main.c: Many i386-dependent codes moved to ...
129: * * linux/dev/arch/i386/irq.c: ... here.
130: * * linux/dev/arch/i386/setup.c: New file.
131: * * linux/dev/arch/i386/linux_emul.h: Likewise.
132: * * linux/dev/arch/i386/glue/timer.c: Merged into sched.c.
133: * * linux/dev/arch/i386/glue/sched.c: Include <machine/spl.h> instead
134: * of <i386/ipl.h>, and moved to ...
135: * * linux/dev/kernel/sched.c: ... here.
136: * * linux/dev/arch/i386/glue/block.c: Include <machine/spl.h> and
137: * <linux_emul.h>, instead of i386-dependent header files, and
138: * moved to ...
139: * * linux/dev/glue/blocl.c: ... here.
140: * * linux/dev/arch/i386/glue/net.c: Include <machine/spl.h> and
141: * <linux_emul.h>, instead of i386-dependent header files, and
142: * moved to ...
143: * * linux/dev/glue/net.c: ... here.
144: * * linux/dev/arch/i386/glue/misc.c: Remove `x86' and moved to ...
145: * * linux/dev/glue/misc.c: ... here.
146: * * linux/dev/arch/i386/glue/kmem.c: Moved to ...
147: * * linux/dev/glue/kmem.c: ... here.
148: *
149: */
150:
151: #include <asm/system.h>
152: #include <linux/signal.h>
153: #include <linux/sched.h>
154: #include <asm/io.h>
155: #include <linux/blk.h>
156: #include "scsi.h"
157: #include "hosts.h"
158: #include "t128.h"
159: #define AUTOPROBE_IRQ
160: #include "NCR5380.h"
161: #include "constants.h"
162: #include "sd.h"
163: #include<linux/stat.h>
164:
165: struct proc_dir_entry proc_scsi_t128 = {
166: PROC_SCSI_T128, 4, "t128",
167: S_IFDIR | S_IRUGO | S_IXUGO, 2
168: };
169:
170:
171: static struct override {
172: unsigned char *address;
173: int irq;
174: } overrides
175: #ifdef T128_OVERRIDE
176: [] = T128_OVERRIDE;
177: #else
178: [4] = {{NULL,IRQ_AUTO}, {NULL,IRQ_AUTO}, {NULL,IRQ_AUTO},
179: {NULL,IRQ_AUTO}};
180: #endif
181:
182: #define NO_OVERRIDES (sizeof(overrides) / sizeof(struct override))
183:
184: static struct base {
185: unsigned char *address;
186: int noauto;
187: } bases[] = {{(unsigned char *) 0xcc000, 0}, {(unsigned char *) 0xc8000, 0},
188: {(unsigned char *) 0xdc000, 0}, {(unsigned char *) 0xd8000, 0}};
189:
190: #define NO_BASES (sizeof (bases) / sizeof (struct base))
191:
192: static const struct signature {
193: const char *string;
194: int offset;
195: } signatures[] = {
196: {"TSROM: SCSI BIOS, Version 1.12", 0x36},
197: };
198:
199: #define NO_SIGNATURES (sizeof (signatures) / sizeof (struct signature))
200:
201: /*
202: * Function : t128_setup(char *str, int *ints)
203: *
204: * Purpose : LILO command line initialization of the overrides array,
205: *
206: * Inputs : str - unused, ints - array of integer parameters with ints[0]
207: * equal to the number of ints.
208: *
209: */
210:
211: void t128_setup(char *str, int *ints) {
212: static int commandline_current = 0;
213: int i;
214: if (ints[0] != 2)
215: printk("t128_setup : usage t128=address,irq\n");
216: else
217: if (commandline_current < NO_OVERRIDES) {
218: overrides[commandline_current].address = (unsigned char *) ints[1];
219: overrides[commandline_current].irq = ints[2];
220: for (i = 0; i < NO_BASES; ++i)
221: if (bases[i].address == (unsigned char *) ints[1]) {
222: bases[i].noauto = 1;
223: break;
224: }
225: ++commandline_current;
226: }
227: }
228:
229: /*
230: * Function : int t128_detect(Scsi_Host_Template * tpnt)
231: *
232: * Purpose : detects and initializes T128,T128F, or T228 controllers
233: * that were autoprobed, overridden on the LILO command line,
234: * or specified at compile time.
235: *
236: * Inputs : tpnt - template for this SCSI adapter.
237: *
238: * Returns : 1 if a host adapter was found, 0 if not.
239: *
240: */
241:
242: int t128_detect(Scsi_Host_Template * tpnt) {
243: static int current_override = 0, current_base = 0;
244: struct Scsi_Host *instance;
245: unsigned char *base;
246: int sig, count;
247:
248: tpnt->proc_dir = &proc_scsi_t128;
249: tpnt->proc_info = &t128_proc_info;
250:
251: for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
252: base = NULL;
253:
254: if (overrides[current_override].address)
255: base = overrides[current_override].address;
256: else
257: for (; !base && (current_base < NO_BASES); ++current_base) {
258: #if (TDEBUG & TDEBUG_INIT)
259: printk("scsi : probing address %08x\n", (unsigned int) bases[current_base].address);
260: #endif
261: for (sig = 0; sig < NO_SIGNATURES; ++sig)
262: if (!bases[current_base].noauto && !memcmp
263: (bases[current_base].address + signatures[sig].offset,
264: signatures[sig].string, strlen(signatures[sig].string))) {
265: base = bases[current_base].address;
266: #if (TDEBUG & TDEBUG_INIT)
267: printk("scsi-t128 : detected board.\n");
268: #endif
269: break;
270: }
271: }
272:
273: #if defined(TDEBUG) && (TDEBUG & TDEBUG_INIT)
274: printk("scsi-t128 : base = %08x\n", (unsigned int) base);
275: #endif
276:
277: if (!base)
278: break;
279:
280: instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata));
281: instance->base = base;
282:
283: NCR5380_init(instance, 0);
284:
285: if (overrides[current_override].irq != IRQ_AUTO)
286: instance->irq = overrides[current_override].irq;
287: else
288: instance->irq = NCR5380_probe_irq(instance, T128_IRQS);
289:
290: if (instance->irq != IRQ_NONE)
291: if (request_irq(instance->irq, t128_intr, SA_INTERRUPT, "t128", NULL)) {
292: printk("scsi%d : IRQ%d not free, interrupts disabled\n",
293: instance->host_no, instance->irq);
294: instance->irq = IRQ_NONE;
295: }
296:
297: if (instance->irq == IRQ_NONE) {
298: printk("scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
299: printk("scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
300: }
301:
302: #if defined(TDEBUG) && (TDEBUG & TDEBUG_INIT)
303: printk("scsi%d : irq = %d\n", instance->host_no, instance->irq);
304: #endif
305:
306: printk("scsi%d : at 0x%08x", instance->host_no, (int)
307: instance->base);
308: if (instance->irq == IRQ_NONE)
309: printk (" interrupts disabled");
310: else
311: printk (" irq %d", instance->irq);
312: printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d",
313: CAN_QUEUE, CMD_PER_LUN, T128_PUBLIC_RELEASE);
314: NCR5380_print_options(instance);
315: printk("\n");
316:
317: ++current_override;
318: ++count;
319: }
320: return count;
321: }
322:
323: /*
324: * Function : int t128_biosparam(Disk * disk, kdev_t dev, int *ip)
325: *
326: * Purpose : Generates a BIOS / DOS compatible H-C-S mapping for
327: * the specified device / size.
328: *
329: * Inputs : size = size of device in sectors (512 bytes), dev = block device
330: * major / minor, ip[] = {heads, sectors, cylinders}
331: *
332: * Returns : always 0 (success), initializes ip
333: *
334: */
335:
336: /*
337: * XXX Most SCSI boards use this mapping, I could be incorrect. Some one
338: * using hard disks on a trantor should verify that this mapping corresponds
339: * to that used by the BIOS / ASPI driver by running the linux fdisk program
340: * and matching the H_C_S coordinates to what DOS uses.
341: */
342:
343: int t128_biosparam(Disk * disk, kdev_t dev, int * ip)
344: {
345: int size = disk->capacity;
346: ip[0] = 64;
347: ip[1] = 32;
348: ip[2] = size >> 11;
349: return 0;
350: }
351:
352: /*
353: * Function : int NCR5380_pread (struct Scsi_Host *instance,
354: * unsigned char *dst, int len)
355: *
356: * Purpose : Fast 5380 pseudo-dma read function, transfers len bytes to
357: * dst
358: *
359: * Inputs : dst = destination, len = length in bytes
360: *
361: * Returns : 0 on success, non zero on a failure such as a watchdog
362: * timeout.
363: */
364:
365: static inline int NCR5380_pread (struct Scsi_Host *instance, unsigned char *dst,
366: int len) {
367: register unsigned char *reg = (unsigned char *) (instance->base +
368: T_DATA_REG_OFFSET), *d = dst;
369: register int i = len;
370:
371:
372: #if 0
373: for (; i; --i) {
374: while (!(instance->base[T_STATUS_REG_OFFSET]) & T_ST_RDY) barrier();
375: #else
376: while (!(instance->base[T_STATUS_REG_OFFSET]) & T_ST_RDY) barrier();
377: for (; i; --i) {
378: #endif
379: *d++ = *reg;
380: }
381:
382: if (*(instance->base + T_STATUS_REG_OFFSET) & T_ST_TIM) {
383: unsigned char tmp;
384: volatile unsigned char *foo;
385: foo = instance->base + T_CONTROL_REG_OFFSET;
386: tmp = *foo;
387: *foo = tmp | T_CR_CT;
388: *foo = tmp;
389: printk("scsi%d : watchdog timer fired in NCR5380_pread()\n",
390: instance->host_no);
391: return -1;
392: } else
393: return 0;
394: }
395:
396: /*
397: * Function : int NCR5380_pwrite (struct Scsi_Host *instance,
398: * unsigned char *src, int len)
399: *
400: * Purpose : Fast 5380 pseudo-dma write function, transfers len bytes from
401: * src
402: *
403: * Inputs : src = source, len = length in bytes
404: *
405: * Returns : 0 on success, non zero on a failure such as a watchdog
406: * timeout.
407: */
408:
409: static inline int NCR5380_pwrite (struct Scsi_Host *instance, unsigned char *src,
410: int len) {
411: register unsigned char *reg = (unsigned char *) (instance->base +
412: T_DATA_REG_OFFSET), *s = src;
413: register int i = len;
414:
415: #if 0
416: for (; i; --i) {
417: while (!(instance->base[T_STATUS_REG_OFFSET]) & T_ST_RDY) barrier();
418: #else
419: while (!(instance->base[T_STATUS_REG_OFFSET]) & T_ST_RDY) barrier();
420: for (; i; --i) {
421: #endif
422: *reg = *s++;
423: }
424:
425: if (*(instance->base + T_STATUS_REG_OFFSET) & T_ST_TIM) {
426: unsigned char tmp;
427: volatile unsigned char *foo;
428: foo = instance->base + T_CONTROL_REG_OFFSET;
429: tmp = *foo;
430: *foo = tmp | T_CR_CT;
431: *foo = tmp;
432: printk("scsi%d : watchdog timer fired in NCR5380_pwrite()\n",
433: instance->host_no);
434: return -1;
435: } else
436: return 0;
437: }
438:
439: #include "NCR5380.c"
440:
441: #ifdef MODULE
442: /* Eventually this will go into an include file, but this will be later */
443: Scsi_Host_Template driver_template = TRANTOR_T128;
444:
445: #include "scsi_module.c"
446: #endif
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