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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: #include <asm/system.h>
106: #include <linux/signal.h>
107: #include <linux/sched.h>
108: #include <asm/io.h>
109: #include <linux/blk.h>
110: #include "scsi.h"
111: #include "hosts.h"
112: #include "t128.h"
113: #define AUTOPROBE_IRQ
114: #include "NCR5380.h"
115: #include "constants.h"
116: #include "sd.h"
117: #include<linux/stat.h>
118:
119: struct proc_dir_entry proc_scsi_t128 = {
120: PROC_SCSI_T128, 4, "t128",
121: S_IFDIR | S_IRUGO | S_IXUGO, 2
122: };
123:
124:
125: static struct override {
126: unsigned char *address;
127: int irq;
128: } overrides
129: #ifdef T128_OVERRIDE
130: [] = T128_OVERRIDE;
131: #else
132: [4] = {{NULL,IRQ_AUTO}, {NULL,IRQ_AUTO}, {NULL,IRQ_AUTO},
133: {NULL,IRQ_AUTO}};
134: #endif
135:
136: #define NO_OVERRIDES (sizeof(overrides) / sizeof(struct override))
137:
138: static struct base {
139: unsigned char *address;
140: int noauto;
141: } bases[] = {{(unsigned char *) 0xcc000, 0}, {(unsigned char *) 0xc8000, 0},
142: {(unsigned char *) 0xdc000, 0}, {(unsigned char *) 0xd8000, 0}};
143:
144: #define NO_BASES (sizeof (bases) / sizeof (struct base))
145:
146: static const struct signature {
147: const char *string;
148: int offset;
149: } signatures[] = {
150: {"TSROM: SCSI BIOS, Version 1.12", 0x36},
151: };
152:
153: #define NO_SIGNATURES (sizeof (signatures) / sizeof (struct signature))
154:
155: /*
156: * Function : t128_setup(char *str, int *ints)
157: *
158: * Purpose : LILO command line initialization of the overrides array,
159: *
160: * Inputs : str - unused, ints - array of integer parameters with ints[0]
161: * equal to the number of ints.
162: *
163: */
164:
165: void t128_setup(char *str, int *ints) {
166: static int commandline_current = 0;
167: int i;
168: if (ints[0] != 2)
169: printk("t128_setup : usage t128=address,irq\n");
170: else
171: if (commandline_current < NO_OVERRIDES) {
172: overrides[commandline_current].address = (unsigned char *) ints[1];
173: overrides[commandline_current].irq = ints[2];
174: for (i = 0; i < NO_BASES; ++i)
175: if (bases[i].address == (unsigned char *) ints[1]) {
176: bases[i].noauto = 1;
177: break;
178: }
179: ++commandline_current;
180: }
181: }
182:
183: /*
184: * Function : int t128_detect(Scsi_Host_Template * tpnt)
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:
196: int t128_detect(Scsi_Host_Template * tpnt) {
197: static int current_override = 0, current_base = 0;
198: struct Scsi_Host *instance;
199: unsigned char *base;
200: int sig, count;
201:
202: tpnt->proc_dir = &proc_scsi_t128;
203: tpnt->proc_info = &t128_proc_info;
204:
205: for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
206: base = NULL;
207:
208: if (overrides[current_override].address)
209: base = overrides[current_override].address;
210: else
211: for (; !base && (current_base < NO_BASES); ++current_base) {
212: #if (TDEBUG & TDEBUG_INIT)
213: printk("scsi : probing address %08x\n", (unsigned int) bases[current_base].address);
214: #endif
215: for (sig = 0; sig < NO_SIGNATURES; ++sig)
216: if (!bases[current_base].noauto && !memcmp
217: (bases[current_base].address + signatures[sig].offset,
218: signatures[sig].string, strlen(signatures[sig].string))) {
219: base = bases[current_base].address;
220: #if (TDEBUG & TDEBUG_INIT)
221: printk("scsi-t128 : detected board.\n");
222: #endif
223: break;
224: }
225: }
226:
227: #if defined(TDEBUG) && (TDEBUG & TDEBUG_INIT)
228: printk("scsi-t128 : base = %08x\n", (unsigned int) base);
229: #endif
230:
231: if (!base)
232: break;
233:
234: instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata));
235: instance->base = base;
236:
237: NCR5380_init(instance, 0);
238:
239: if (overrides[current_override].irq != IRQ_AUTO)
240: instance->irq = overrides[current_override].irq;
241: else
242: instance->irq = NCR5380_probe_irq(instance, T128_IRQS);
243:
244: if (instance->irq != IRQ_NONE)
245: if (request_irq(instance->irq, t128_intr, SA_INTERRUPT, "t128", NULL)) {
246: printk("scsi%d : IRQ%d not free, interrupts disabled\n",
247: instance->host_no, instance->irq);
248: instance->irq = IRQ_NONE;
249: }
250:
251: if (instance->irq == IRQ_NONE) {
252: printk("scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
253: printk("scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
254: }
255:
256: #if defined(TDEBUG) && (TDEBUG & TDEBUG_INIT)
257: printk("scsi%d : irq = %d\n", instance->host_no, instance->irq);
258: #endif
259:
260: printk("scsi%d : at 0x%08x", instance->host_no, (int)
261: instance->base);
262: if (instance->irq == IRQ_NONE)
263: printk (" interrupts disabled");
264: else
265: printk (" irq %d", instance->irq);
266: printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d",
267: CAN_QUEUE, CMD_PER_LUN, T128_PUBLIC_RELEASE);
268: NCR5380_print_options(instance);
269: printk("\n");
270:
271: ++current_override;
272: ++count;
273: }
274: return count;
275: }
276:
277: /*
278: * Function : int t128_biosparam(Disk * disk, kdev_t dev, int *ip)
279: *
280: * Purpose : Generates a BIOS / DOS compatible H-C-S mapping for
281: * the specified device / size.
282: *
283: * Inputs : size = size of device in sectors (512 bytes), dev = block device
284: * major / minor, ip[] = {heads, sectors, cylinders}
285: *
286: * Returns : always 0 (success), initializes ip
287: *
288: */
289:
290: /*
291: * XXX Most SCSI boards use this mapping, I could be incorrect. Some one
292: * using hard disks on a trantor should verify that this mapping corresponds
293: * to that used by the BIOS / ASPI driver by running the linux fdisk program
294: * and matching the H_C_S coordinates to what DOS uses.
295: */
296:
297: int t128_biosparam(Disk * disk, kdev_t dev, int * ip)
298: {
299: int size = disk->capacity;
300: ip[0] = 64;
301: ip[1] = 32;
302: ip[2] = size >> 11;
303: return 0;
304: }
305:
306: /*
307: * Function : int NCR5380_pread (struct Scsi_Host *instance,
308: * unsigned char *dst, int len)
309: *
310: * Purpose : Fast 5380 pseudo-dma read function, transfers len bytes to
311: * dst
312: *
313: * Inputs : dst = destination, len = length in bytes
314: *
315: * Returns : 0 on success, non zero on a failure such as a watchdog
316: * timeout.
317: */
318:
319: static inline int NCR5380_pread (struct Scsi_Host *instance, unsigned char *dst,
320: int len) {
321: register unsigned char *reg = (unsigned char *) (instance->base +
322: T_DATA_REG_OFFSET), *d = dst;
323: register int i = len;
324:
325:
326: #if 0
327: for (; i; --i) {
328: while (!(instance->base[T_STATUS_REG_OFFSET]) & T_ST_RDY) barrier();
329: #else
330: while (!(instance->base[T_STATUS_REG_OFFSET]) & T_ST_RDY) barrier();
331: for (; i; --i) {
332: #endif
333: *d++ = *reg;
334: }
335:
336: if (*(instance->base + T_STATUS_REG_OFFSET) & T_ST_TIM) {
337: unsigned char tmp;
338: volatile unsigned char *foo;
339: foo = instance->base + T_CONTROL_REG_OFFSET;
340: tmp = *foo;
341: *foo = tmp | T_CR_CT;
342: *foo = tmp;
343: printk("scsi%d : watchdog timer fired in NCR5380_pread()\n",
344: instance->host_no);
345: return -1;
346: } else
347: return 0;
348: }
349:
350: /*
351: * Function : int NCR5380_pwrite (struct Scsi_Host *instance,
352: * unsigned char *src, int len)
353: *
354: * Purpose : Fast 5380 pseudo-dma write function, transfers len bytes from
355: * src
356: *
357: * Inputs : src = source, len = length in bytes
358: *
359: * Returns : 0 on success, non zero on a failure such as a watchdog
360: * timeout.
361: */
362:
363: static inline int NCR5380_pwrite (struct Scsi_Host *instance, unsigned char *src,
364: int len) {
365: register unsigned char *reg = (unsigned char *) (instance->base +
366: T_DATA_REG_OFFSET), *s = src;
367: register int i = len;
368:
369: #if 0
370: for (; i; --i) {
371: while (!(instance->base[T_STATUS_REG_OFFSET]) & T_ST_RDY) barrier();
372: #else
373: while (!(instance->base[T_STATUS_REG_OFFSET]) & T_ST_RDY) barrier();
374: for (; i; --i) {
375: #endif
376: *reg = *s++;
377: }
378:
379: if (*(instance->base + T_STATUS_REG_OFFSET) & T_ST_TIM) {
380: unsigned char tmp;
381: volatile unsigned char *foo;
382: foo = instance->base + T_CONTROL_REG_OFFSET;
383: tmp = *foo;
384: *foo = tmp | T_CR_CT;
385: *foo = tmp;
386: printk("scsi%d : watchdog timer fired in NCR5380_pwrite()\n",
387: instance->host_no);
388: return -1;
389: } else
390: return 0;
391: }
392:
393: #include "NCR5380.c"
394:
395: #ifdef MODULE
396: /* Eventually this will go into an include file, but this will be later */
397: Scsi_Host_Template driver_template = TRANTOR_T128;
398:
399: #include "scsi_module.c"
400: #endif
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