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*/
1 #define AUTOSENSE
2 #define PSEUDO_DMA
3 #define FOO
4 #define UNSAFE /* Not unsafe for PAS16 -- use it */
5
6 /*
7 * This driver adapted from Drew Eckhardt's Trantor T128 driver
8 *
9 * Copyright 1993, Drew Eckhardt
10 * Visionary Computing
11 * (Unix and Linux consulting and custom programming)
12 * drew@colorado.edu
13 * +1 (303) 666-5836
14 *
15 * ( Based on T128 - DISTRIBUTION RELEASE 3. )
16 *
17 * Modified to work with the Pro Audio Spectrum/Studio 16
18 * by John Weidman.
19 *
20 *
21 * For more information, please consult
22 *
23 * Media Vision
24 * (510) 770-8600
25 * (800) 348-7116
26 *
27 * and
28 *
29 * NCR 5380 Family
30 * SCSI Protocol Controller
31 * Databook
32 *
33 * NCR Microelectronics
34 * 1635 Aeroplaza Drive
35 * Colorado Springs, CO 80916
36 * 1+ (719) 578-3400
37 * 1+ (800) 334-5454
38 */
39
40 /*
41 * Options :
42 * AUTOSENSE - if defined, REQUEST SENSE will be performed automatically
43 * for commands that return with a CHECK CONDITION status.
44 *
45 * LIMIT_TRANSFERSIZE - if defined, limit the pseudo-dma transfers to 512
46 * bytes at a time. Since interrupts are disabled by default during
47 * these transfers, we might need this to give reasonable interrupt
48 * service time if the transfer size gets too large.
49 *
50 * PSEUDO_DMA - enables PSEUDO-DMA hardware, should give a 3-4X performance
51 * increase compared to polled I/O.
52 *
53 * PARITY - enable parity checking. Not supported.
54 *
55 * SCSI2 - enable support for SCSI-II tagged queueing. Untested.
56 *
57 * UNSAFE - leave interrupts enabled during pseudo-DMA transfers. This
58 * parameter comes from the NCR5380 code. It is NOT unsafe with
59 * the PAS16 and you should use it. If you don't you will have
60 * a problem with dropped characters during high speed
61 * communications during SCSI transfers. If you really don't
62 * want to use UNSAFE you can try defining LIMIT_TRANSFERSIZE or
63 * twiddle with the transfer size in the high level code.
64 *
65 * USLEEP - enable support for devices that don't disconnect. Untested.
66 *
67 * The card is detected and initialized in one of several ways :
68 * 1. Autoprobe (default) - There are many different models of
69 * the Pro Audio Spectrum/Studio 16, and I only have one of
70 * them, so this may require a little tweaking. An interrupt
71 * is triggered to autoprobe for the interrupt line. Note:
72 * with the newer model boards, the interrupt is set via
73 * software after reset using the default_irq for the
74 * current board number.
75 *
76 *
77 * 2. With command line overrides - pas16=port,irq may be
78 * used on the LILO command line to override the defaults.
79 *
80 * 3. With the PAS16_OVERRIDE compile time define. This is
81 * specified as an array of address, irq tuples. Ie, for
82 * one board at the default 0x388 address, IRQ10, I could say
83 * -DPAS16_OVERRIDE={{0x388, 10}}
84 * NOTE: Untested.
85 *
86 * Note that if the override methods are used, place holders must
87 * be specified for other boards in the system.
88 *
89 *
90 * Configuration notes :
91 * The current driver does not support interrupt sharing with the
92 * sound portion of the card. If you use the same irq for the
93 * scsi port and sound you will have problems. Either use
94 * a different irq for the scsi port or don't use interrupts
95 * for the scsi port.
96 *
97 * If you have problems with your card not being recognized, use
98 * the LILO command line override. Try to get it recognized without
99 * interrupts. Ie, for a board at the default 0x388 base port,
100 * boot: linux pas16=0x388,255
101 *
102 * (255 is the IRQ_NONE constant in NCR5380.h)
103 */
104
105 #ifdef MODULE
106 #include <linux/module.h>
107 #endif
108
109 #include <asm/system.h>
110 #include <linux/signal.h>
111 #include <linux/proc_fs.h>
112 #include <linux/sched.h>
113 #include <asm/io.h>
114 #include <linux/blk.h>
115 #include "scsi.h"
116 #include "hosts.h"
117 #include "pas16.h"
118 #define AUTOPROBE_IRQ
119 #include "NCR5380.h"
120 #include "constants.h"
121 #include "sd.h"
122
123 #include<linux/stat.h>
124
125 struct proc_dir_entry proc_scsi_pas16 = {
126 PROC_SCSI_PAS16, 5, "pas16",
127 S_IFDIR | S_IRUGO | S_IXUGO, 2
128 };
129 static int pas_maxi = 0;
130 static int pas_wmaxi = 0;
131
132
133 int scsi_irq_translate[] =
134 { 0, 0, 1, 2, 3, 4, 5, 6, 0, 0, 7, 8, 9, 0, 10, 11 };
135
136 /* The default_irqs array contains values used to set the irq into the
137 * board via software (as must be done on newer model boards without
138 * irq jumpers on the board). The first value in the array will be
139 * assigned to logical board 0, the next to board 1, etc.
140 */
141 int default_irqs[] = { PAS16_DEFAULT_BOARD_1_IRQ,
142 PAS16_DEFAULT_BOARD_2_IRQ,
143 PAS16_DEFAULT_BOARD_3_IRQ,
144 PAS16_DEFAULT_BOARD_4_IRQ
145 };
146
147 static struct override {
148 unsigned short io_port;
149 int irq;
150 } overrides
151 #ifdef PAS16_OVERRIDE
152 [] = PAS16_OVERRIDE;
153 #else
154 [4] = {{0,IRQ_AUTO}, {0,IRQ_AUTO}, {0,IRQ_AUTO},
155 {0,IRQ_AUTO}};
156 #endif
157
158 #define NO_OVERRIDES (sizeof(overrides) / sizeof(struct override))
159
160 static struct base {
161 unsigned short io_port;
162 int noauto;
163 } bases[] = { {PAS16_DEFAULT_BASE_1, 0},
164 {PAS16_DEFAULT_BASE_2, 0},
165 {PAS16_DEFAULT_BASE_3, 0},
166 {PAS16_DEFAULT_BASE_4, 0}
167 };
168
169 #define NO_BASES (sizeof (bases) / sizeof (struct base))
170
171 unsigned short pas16_offset[ 8 ] =
172 {
173 0x1c00, /* OUTPUT_DATA_REG */
174 0x1c01, /* INITIATOR_COMMAND_REG */
175 0x1c02, /* MODE_REG */
176 0x1c03, /* TARGET_COMMAND_REG */
177 0x3c00, /* STATUS_REG ro, SELECT_ENABLE_REG wo */
178 0x3c01, /* BUS_AND_STATUS_REG ro, START_DMA_SEND_REG wo */
179 0x3c02, /* INPUT_DATA_REGISTER ro, (N/A on PAS16 ?)
180 * START_DMA_TARGET_RECEIVE_REG wo
181 */
182 0x3c03, /* RESET_PARITY_INTERRUPT_REG ro,
183 * START_DMA_INITIATOR_RECEIVE_REG wo
184 */
185 };
186 /*----------------------------------------------------------------*/
187 /* the following will set the monitor border color (useful to find
188 where something crashed or gets stuck at */
189 /* 1 = blue
190 2 = green
191 3 = cyan
192 4 = red
193 5 = magenta
194 6 = yellow
195 7 = white
196 */
197 #if 1
198 #define rtrc(i) {inb(0x3da); outb(0x31, 0x3c0); outb((i), 0x3c0);}
199 #else
200 #define rtrc(i) {}
201 #endif
202
203
204 /*
205 * Function : enable_board( int board_num, unsigned short port )
206 *
207 * Purpose : set address in new model board
208 *
209 * Inputs : board_num - logical board number 0-3, port - base address
210 *
211 */
212
213 void enable_board( int board_num, unsigned short port )
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*/
214 {
215 outb( 0xbc + board_num, MASTER_ADDRESS_PTR );
216 outb( port >> 2, MASTER_ADDRESS_PTR );
217 }
218
219
220
221 /*
222 * Function : init_board( unsigned short port, int irq )
223 *
224 * Purpose : Set the board up to handle the SCSI interface
225 *
226 * Inputs : port - base address of the board,
227 * irq - irq to assign to the SCSI port
228 * force_irq - set it even if it conflicts with sound driver
229 *
230 */
231
232 void init_board( unsigned short io_port, int irq, int force_irq )
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233 {
234 unsigned int tmp;
235 unsigned int pas_irq_code;
236
237 /* Initialize the SCSI part of the board */
238
239 outb( 0x30, io_port + P_TIMEOUT_COUNTER_REG ); /* Timeout counter */
240 outb( 0x01, io_port + P_TIMEOUT_STATUS_REG_OFFSET ); /* Reset TC */
241 outb( 0x01, io_port + WAIT_STATE ); /* 1 Wait state */
242
243 NCR5380_read( RESET_PARITY_INTERRUPT_REG );
244
245 /* Set the SCSI interrupt pointer without mucking up the sound
246 * interrupt pointer in the same byte.
247 */
248 pas_irq_code = ( irq < 16 ) ? scsi_irq_translate[irq] : 0;
249 tmp = inb( io_port + IO_CONFIG_3 );
250
251 if( (( tmp & 0x0f ) == pas_irq_code) && pas_irq_code > 0
252 && !force_irq )
253 {
254 printk( "pas16: WARNING: Can't use same irq as sound "
255 "driver -- interrupts disabled\n" );
256 /* Set up the drive parameters, disable 5380 interrupts */
257 outb( 0x4d, io_port + SYS_CONFIG_4 );
258 }
259 else
260 {
261 tmp = ( tmp & 0x0f ) | ( pas_irq_code << 4 );
262 outb( tmp, io_port + IO_CONFIG_3 );
263
264 /* Set up the drive parameters and enable 5380 interrupts */
265 outb( 0x6d, io_port + SYS_CONFIG_4 );
266 }
267 }
268
269
270 /*
271 * Function : pas16_hw_detect( unsigned short board_num )
272 *
273 * Purpose : determine if a pas16 board is present
274 *
275 * Inputs : board_num - logical board number ( 0 - 3 )
276 *
277 * Returns : 0 if board not found, 1 if found.
278 */
279
280 int pas16_hw_detect( unsigned short board_num )
/* */
281 {
282 unsigned char board_rev, tmp;
283 unsigned short io_port = bases[ board_num ].io_port;
284
285 /* See if we can find a PAS16 board at the address associated
286 * with this logical board number.
287 */
288
289 /* First, attempt to take a newer model board out of reset and
290 * give it a base address. This shouldn't affect older boards.
291 */
292 enable_board( board_num, io_port );
293
294 /* Now see if it looks like a PAS16 board */
295 board_rev = inb( io_port + PCB_CONFIG );
296
297 if( board_rev == 0xff )
298 return 0;
299
300 tmp = board_rev ^ 0xe0;
301
302 outb( tmp, io_port + PCB_CONFIG );
303 tmp = inb( io_port + PCB_CONFIG );
304 outb( board_rev, io_port + PCB_CONFIG );
305
306 if( board_rev != tmp ) /* Not a PAS-16 */
307 return 0;
308
309 if( ( inb( io_port + OPERATION_MODE_1 ) & 0x03 ) != 0x03 )
310 return 0; /* return if no SCSI interface found */
311
312 /* Mediavision has some new model boards that return ID bits
313 * that indicate a SCSI interface, but they're not (LMS). We'll
314 * put in an additional test to try and weed them out.
315 */
316
317 outb( 0x01, io_port + WAIT_STATE ); /* 1 Wait state */
318 NCR5380_write( MODE_REG, 0x20 ); /* Is it really SCSI? */
319 if( NCR5380_read( MODE_REG ) != 0x20 ) /* Write to a reg. */
320 return 0; /* and try to read */
321 NCR5380_write( MODE_REG, 0x00 ); /* it back. */
322 if( NCR5380_read( MODE_REG ) != 0x00 )
323 return 0;
324
325 return 1;
326 }
327
328
329 /*
330 * Function : pas16_setup(char *str, int *ints)
331 *
332 * Purpose : LILO command line initialization of the overrides array,
333 *
334 * Inputs : str - unused, ints - array of integer parameters with ints[0]
335 * equal to the number of ints.
336 *
337 */
338
339 void pas16_setup(char *str, int *ints) {
/* */
340 static int commandline_current = 0;
341 int i;
342 if (ints[0] != 2)
343 printk("pas16_setup : usage pas16=io_port,irq\n");
344 else
345 if (commandline_current < NO_OVERRIDES) {
346 overrides[commandline_current].io_port = (unsigned short) ints[1];
347 overrides[commandline_current].irq = ints[2];
348 for (i = 0; i < NO_BASES; ++i)
349 if (bases[i].io_port == (unsigned short) ints[1]) {
350 bases[i].noauto = 1;
351 break;
352 }
353 ++commandline_current;
354 }
355 }
356
357 /*
358 * Function : int pas16_detect(Scsi_Host_Template * tpnt)
359 *
360 * Purpose : detects and initializes PAS16 controllers
361 * that were autoprobed, overridden on the LILO command line,
362 * or specified at compile time.
363 *
364 * Inputs : tpnt - template for this SCSI adapter.
365 *
366 * Returns : 1 if a host adapter was found, 0 if not.
367 *
368 */
369
370 int pas16_detect(Scsi_Host_Template * tpnt) {
/* */
371 static int current_override = 0;
372 static unsigned short current_base = 0;
373 struct Scsi_Host *instance;
374 unsigned short io_port;
375 int count;
376
377 tpnt->proc_dir = &proc_scsi_pas16;
378 tpnt->proc_info = &pas16_proc_info;
379
380 for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
381 io_port = 0;
382
383 if (overrides[current_override].io_port)
384 {
385 io_port = overrides[current_override].io_port;
386 enable_board( current_override, io_port );
387 init_board( io_port, overrides[current_override].irq, 1 );
388 }
389 else
390 for (; !io_port && (current_base < NO_BASES); ++current_base) {
391 #if (PDEBUG & PDEBUG_INIT)
392 printk("scsi-pas16 : probing io_port %04x\n", (unsigned int) bases[current_base].io_port);
393 #endif
394 if ( !bases[current_base].noauto &&
395 pas16_hw_detect( current_base ) ){
396 io_port = bases[current_base].io_port;
397 init_board( io_port, default_irqs[ current_base ], 0 );
398 #if (PDEBUG & PDEBUG_INIT)
399 printk("scsi-pas16 : detected board.\n");
400 #endif
401 }
402 }
403
404
405 #if defined(PDEBUG) && (PDEBUG & PDEBUG_INIT)
406 printk("scsi-pas16 : io_port = %04x\n", (unsigned int) io_port);
407 #endif
408
409 if (!io_port)
410 break;
411
412 instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata));
413 instance->io_port = io_port;
414
415 NCR5380_init(instance, 0);
416
417 if (overrides[current_override].irq != IRQ_AUTO)
418 instance->irq = overrides[current_override].irq;
419 else
420 instance->irq = NCR5380_probe_irq(instance, PAS16_IRQS);
421
422 if (instance->irq != IRQ_NONE)
423 if (request_irq(instance->irq, pas16_intr, SA_INTERRUPT, "pas16", NULL)) {
424 printk("scsi%d : IRQ%d not free, interrupts disabled\n",
425 instance->host_no, instance->irq);
426 instance->irq = IRQ_NONE;
427 }
428
429 if (instance->irq == IRQ_NONE) {
430 printk("scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
431 printk("scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
432 /* Disable 5380 interrupts, leave drive params the same */
433 outb( 0x4d, io_port + SYS_CONFIG_4 );
434 outb( (inb(io_port + IO_CONFIG_3) & 0x0f), io_port + IO_CONFIG_3 );
435 }
436
437 #if defined(PDEBUG) && (PDEBUG & PDEBUG_INIT)
438 printk("scsi%d : irq = %d\n", instance->host_no, instance->irq);
439 #endif
440
441 printk("scsi%d : at 0x%04x", instance->host_no, (int)
442 instance->io_port);
443 if (instance->irq == IRQ_NONE)
444 printk (" interrupts disabled");
445 else
446 printk (" irq %d", instance->irq);
447 printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d",
448 CAN_QUEUE, CMD_PER_LUN, PAS16_PUBLIC_RELEASE);
449 NCR5380_print_options(instance);
450 printk("\n");
451
452 ++current_override;
453 ++count;
454 }
455 return count;
456 }
457
458 /*
459 * Function : int pas16_biosparam(Disk *disk, kdev_t dev, int *ip)
460 *
461 * Purpose : Generates a BIOS / DOS compatible H-C-S mapping for
462 * the specified device / size.
463 *
464 * Inputs : size = size of device in sectors (512 bytes), dev = block device
465 * major / minor, ip[] = {heads, sectors, cylinders}
466 *
467 * Returns : always 0 (success), initializes ip
468 *
469 */
470
471 /*
472 * XXX Most SCSI boards use this mapping, I could be incorrect. Some one
473 * using hard disks on a trantor should verify that this mapping corresponds
474 * to that used by the BIOS / ASPI driver by running the linux fdisk program
475 * and matching the H_C_S coordinates to what DOS uses.
476 */
477
478 int pas16_biosparam(Disk * disk, kdev_t dev, int * ip)
/* */
479 {
480 int size = disk->capacity;
481 ip[0] = 64;
482 ip[1] = 32;
483 ip[2] = size >> 11; /* I think I have it as /(32*64) */
484 if( ip[2] > 1024 ) { /* yes, >, not >= */
485 ip[0]=255;
486 ip[1]=63;
487 ip[2]=size/(63*255);
488 if( ip[2] > 1023 ) /* yes >1023... */
489 ip[2] = 1023;
490 }
491
492 return 0;
493 }
494
495 /*
496 * Function : int NCR5380_pread (struct Scsi_Host *instance,
497 * unsigned char *dst, int len)
498 *
499 * Purpose : Fast 5380 pseudo-dma read function, transfers len bytes to
500 * dst
501 *
502 * Inputs : dst = destination, len = length in bytes
503 *
504 * Returns : 0 on success, non zero on a failure such as a watchdog
505 * timeout.
506 */
507
508 static inline int NCR5380_pread (struct Scsi_Host *instance, unsigned char *dst,
/* */
509 int len) {
510 register unsigned char *d = dst;
511 register unsigned short reg = (unsigned short) (instance->io_port +
512 P_DATA_REG_OFFSET);
513 register i = len;
514 int ii = 0;
515
516 while ( !(inb(instance->io_port + P_STATUS_REG_OFFSET) & P_ST_RDY) )
517 ++ii;
518
519 insb( reg, d, i );
520
521 if ( inb(instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET) & P_TS_TIM) {
522 outb( P_TS_CT, instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET);
523 printk("scsi%d : watchdog timer fired in NCR5380_pread()\n",
524 instance->host_no);
525 return -1;
526 }
527 if (ii > pas_maxi)
528 pas_maxi = ii;
529 return 0;
530 }
531
532 /*
533 * Function : int NCR5380_pwrite (struct Scsi_Host *instance,
534 * unsigned char *src, int len)
535 *
536 * Purpose : Fast 5380 pseudo-dma write function, transfers len bytes from
537 * src
538 *
539 * Inputs : src = source, len = length in bytes
540 *
541 * Returns : 0 on success, non zero on a failure such as a watchdog
542 * timeout.
543 */
544
545 static inline int NCR5380_pwrite (struct Scsi_Host *instance, unsigned char *src,
/* ![[last]](../icons/n_last.png)
*/
546 int len) {
547 register unsigned char *s = src;
548 register unsigned short reg = (instance->io_port + P_DATA_REG_OFFSET);
549 register i = len;
550 int ii = 0;
551
552 while ( !((inb(instance->io_port + P_STATUS_REG_OFFSET)) & P_ST_RDY) )
553 ++ii;
554
555 outsb( reg, s, i );
556
557 if (inb(instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET) & P_TS_TIM) {
558 outb( P_TS_CT, instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET);
559 printk("scsi%d : watchdog timer fired in NCR5380_pwrite()\n",
560 instance->host_no);
561 return -1;
562 }
563 if (ii > pas_maxi)
564 pas_wmaxi = ii;
565 return 0;
566 }
567
568 #include "NCR5380.c"
569
570 #ifdef MODULE
571 /* Eventually this will go into an include file, but this will be later */
572 Scsi_Host_Template driver_template = MV_PAS16;
573
574 #include <linux/module.h>
575 #include "scsi_module.c"
576 #endif
![[bottom]](../icons/n_bottom.png){kind=icon}
*/