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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
130 int scsi_irq_translate[] =
131 { 0, 0, 1, 2, 3, 4, 5, 6, 0, 0, 7, 8, 9, 0, 10, 11 };
132
133 /* The default_irqs array contains values used to set the irq into the
134 * board via software (as must be done on newer model boards without
135 * irq jumpers on the board). The first value in the array will be
136 * assigned to logical board 0, the next to board 1, etc.
137 */
138 int default_irqs[] = { PAS16_DEFAULT_BOARD_1_IRQ,
139 PAS16_DEFAULT_BOARD_2_IRQ,
140 PAS16_DEFAULT_BOARD_3_IRQ,
141 PAS16_DEFAULT_BOARD_4_IRQ
142 };
143
144 static struct override {
145 unsigned short io_port;
146 int irq;
147 } overrides
148 #ifdef PAS16_OVERRIDE
149 [] = PAS16_OVERRIDE;
150 #else
151 [4] = {{0,IRQ_AUTO}, {0,IRQ_AUTO}, {0,IRQ_AUTO},
152 {0,IRQ_AUTO}};
153 #endif
154
155 #define NO_OVERRIDES (sizeof(overrides) / sizeof(struct override))
156
157 static struct base {
158 unsigned short io_port;
159 int noauto;
160 } bases[] = { {PAS16_DEFAULT_BASE_1, 0},
161 {PAS16_DEFAULT_BASE_2, 0},
162 {PAS16_DEFAULT_BASE_3, 0},
163 {PAS16_DEFAULT_BASE_4, 0}
164 };
165
166 #define NO_BASES (sizeof (bases) / sizeof (struct base))
167
168 unsigned short pas16_offset[ 8 ] =
169 {
170 0x1c00, /* OUTPUT_DATA_REG */
171 0x1c01, /* INITIATOR_COMMAND_REG */
172 0x1c02, /* MODE_REG */
173 0x1c03, /* TARGET_COMMAND_REG */
174 0x3c00, /* STATUS_REG ro, SELECT_ENABLE_REG wo */
175 0x3c01, /* BUS_AND_STATUS_REG ro, START_DMA_SEND_REG wo */
176 0x3c02, /* INPUT_DATA_REGISTER ro, (N/A on PAS16 ?)
177 * START_DMA_TARGET_RECEIVE_REG wo
178 */
179 0x3c03, /* RESET_PARITY_INTERRUPT_REG ro,
180 * START_DMA_INITIATOR_RECEIVE_REG wo
181 */
182 };
183
184
185
186 /*
187 * Function : enable_board( int board_num, unsigned short port )
188 *
189 * Purpose : set address in new model board
190 *
191 * Inputs : board_num - logical board number 0-3, port - base address
192 *
193 */
194
195 void enable_board( int board_num, unsigned short port )
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*/
196 {
197 outb( 0xbc + board_num, MASTER_ADDRESS_PTR );
198 outb( port >> 2, MASTER_ADDRESS_PTR );
199 }
200
201
202
203 /*
204 * Function : init_board( unsigned short port, int irq )
205 *
206 * Purpose : Set the board up to handle the SCSI interface
207 *
208 * Inputs : port - base address of the board,
209 * irq - irq to assign to the SCSI port
210 * force_irq - set it even if it conflicts with sound driver
211 *
212 */
213
214 void init_board( unsigned short io_port, int irq, int force_irq )
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215 {
216 unsigned int tmp;
217 unsigned int pas_irq_code;
218
219 /* Initialize the SCSI part of the board */
220
221 outb( 0x30, io_port + P_TIMEOUT_COUNTER_REG ); /* Timeout counter */
222 outb( 0x01, io_port + P_TIMEOUT_STATUS_REG_OFFSET ); /* Reset TC */
223 outb( 0x01, io_port + WAIT_STATE ); /* 1 Wait state */
224
225 NCR5380_read( RESET_PARITY_INTERRUPT_REG );
226
227 /* Set the SCSI interrupt pointer without mucking up the sound
228 * interrupt pointer in the same byte.
229 */
230 pas_irq_code = ( irq < 16 ) ? scsi_irq_translate[irq] : 0;
231 tmp = inb( io_port + IO_CONFIG_3 );
232
233 if( (( tmp & 0x0f ) == pas_irq_code) && pas_irq_code > 0
234 && !force_irq )
235 {
236 printk( "pas16: WARNING: Can't use same irq as sound "
237 "driver -- interrupts disabled\n" );
238 /* Set up the drive parameters, disable 5380 interrupts */
239 outb( 0x4d, io_port + SYS_CONFIG_4 );
240 }
241 else
242 {
243 tmp = ( tmp & 0x0f ) | ( pas_irq_code << 4 );
244 outb( tmp, io_port + IO_CONFIG_3 );
245
246 /* Set up the drive parameters and enable 5380 interrupts */
247 outb( 0x6d, io_port + SYS_CONFIG_4 );
248 }
249 }
250
251
252 /*
253 * Function : pas16_hw_detect( unsigned short board_num )
254 *
255 * Purpose : determine if a pas16 board is present
256 *
257 * Inputs : board_num - logical board number ( 0 - 3 )
258 *
259 * Returns : 0 if board not found, 1 if found.
260 */
261
262 int pas16_hw_detect( unsigned short board_num )
/* */
263 {
264 unsigned char board_rev, tmp;
265 unsigned short io_port = bases[ board_num ].io_port;
266
267 /* See if we can find a PAS16 board at the address associated
268 * with this logical board number.
269 */
270
271 /* First, attempt to take a newer model board out of reset and
272 * give it a base address. This shouldn't affect older boards.
273 */
274 enable_board( board_num, io_port );
275
276 /* Now see if it looks like a PAS16 board */
277 board_rev = inb( io_port + PCB_CONFIG );
278
279 if( board_rev == 0xff )
280 return 0;
281
282 tmp = board_rev ^ 0xe0;
283
284 outb( tmp, io_port + PCB_CONFIG );
285 tmp = inb( io_port + PCB_CONFIG );
286 outb( board_rev, io_port + PCB_CONFIG );
287
288 if( board_rev != tmp ) /* Not a PAS-16 */
289 return 0;
290
291 if( ( inb( io_port + OPERATION_MODE_1 ) & 0x03 ) != 0x03 )
292 return 0; /* return if no SCSI interface found */
293
294 /* Mediavision has some new model boards that return ID bits
295 * that indicate a SCSI interface, but they're not (LMS). We'll
296 * put in an additional test to try and weed them out.
297 */
298
299 outb( 0x01, io_port + WAIT_STATE ); /* 1 Wait state */
300 NCR5380_write( MODE_REG, 0x20 ); /* Is it really SCSI? */
301 if( NCR5380_read( MODE_REG ) != 0x20 ) /* Write to a reg. */
302 return 0; /* and try to read */
303 NCR5380_write( MODE_REG, 0x00 ); /* it back. */
304 if( NCR5380_read( MODE_REG ) != 0x00 )
305 return 0;
306
307 return 1;
308 }
309
310
311 /*
312 * Function : pas16_setup(char *str, int *ints)
313 *
314 * Purpose : LILO command line initialization of the overrides array,
315 *
316 * Inputs : str - unused, ints - array of integer parameters with ints[0]
317 * equal to the number of ints.
318 *
319 */
320
321 void pas16_setup(char *str, int *ints) {
/* */
322 static int commandline_current = 0;
323 int i;
324 if (ints[0] != 2)
325 printk("pas16_setup : usage pas16=io_port,irq\n");
326 else
327 if (commandline_current < NO_OVERRIDES) {
328 overrides[commandline_current].io_port = (unsigned short) ints[1];
329 overrides[commandline_current].irq = ints[2];
330 for (i = 0; i < NO_BASES; ++i)
331 if (bases[i].io_port == (unsigned short) ints[1]) {
332 bases[i].noauto = 1;
333 break;
334 }
335 ++commandline_current;
336 }
337 }
338
339 /*
340 * Function : int pas16_detect(Scsi_Host_Template * tpnt)
341 *
342 * Purpose : detects and initializes PAS16 controllers
343 * that were autoprobed, overridden on the LILO command line,
344 * or specified at compile time.
345 *
346 * Inputs : tpnt - template for this SCSI adapter.
347 *
348 * Returns : 1 if a host adapter was found, 0 if not.
349 *
350 */
351
352 int pas16_detect(Scsi_Host_Template * tpnt) {
/* */
353 static int current_override = 0;
354 static unsigned short current_base = 0;
355 struct Scsi_Host *instance;
356 unsigned short io_port;
357 int count;
358
359 tpnt->proc_dir = &proc_scsi_pas16;
360
361 for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
362 io_port = 0;
363
364 if (overrides[current_override].io_port)
365 {
366 io_port = overrides[current_override].io_port;
367 enable_board( current_override, io_port );
368 init_board( io_port, overrides[current_override].irq, 1 );
369 }
370 else
371 for (; !io_port && (current_base < NO_BASES); ++current_base) {
372 #if (PDEBUG & PDEBUG_INIT)
373 printk("scsi-pas16 : probing io_port %04x\n", (unsigned int) bases[current_base].io_port);
374 #endif
375 if ( !bases[current_base].noauto &&
376 pas16_hw_detect( current_base ) ){
377 io_port = bases[current_base].io_port;
378 init_board( io_port, default_irqs[ current_base ], 0 );
379 #if (PDEBUG & PDEBUG_INIT)
380 printk("scsi-pas16 : detected board.\n");
381 #endif
382 }
383 }
384
385
386 #if defined(PDEBUG) && (PDEBUG & PDEBUG_INIT)
387 printk("scsi-pas16 : io_port = %04x\n", (unsigned int) io_port);
388 #endif
389
390 if (!io_port)
391 break;
392
393 instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata));
394 instance->io_port = io_port;
395
396 NCR5380_init(instance, 0);
397
398 if (overrides[current_override].irq != IRQ_AUTO)
399 instance->irq = overrides[current_override].irq;
400 else
401 instance->irq = NCR5380_probe_irq(instance, PAS16_IRQS);
402
403 if (instance->irq != IRQ_NONE)
404 if (request_irq(instance->irq, pas16_intr, SA_INTERRUPT, "pas16", NULL)) {
405 printk("scsi%d : IRQ%d not free, interrupts disabled\n",
406 instance->host_no, instance->irq);
407 instance->irq = IRQ_NONE;
408 }
409
410 if (instance->irq == IRQ_NONE) {
411 printk("scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
412 printk("scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
413 /* Disable 5380 interrupts, leave drive params the same */
414 outb( 0x4d, io_port + SYS_CONFIG_4 );
415 outb( (inb(io_port + IO_CONFIG_3) & 0x0f), io_port + IO_CONFIG_3 );
416 }
417
418 #if defined(PDEBUG) && (PDEBUG & PDEBUG_INIT)
419 printk("scsi%d : irq = %d\n", instance->host_no, instance->irq);
420 #endif
421
422 printk("scsi%d : at 0x%04x", instance->host_no, (int)
423 instance->io_port);
424 if (instance->irq == IRQ_NONE)
425 printk (" interrupts disabled");
426 else
427 printk (" irq %d", instance->irq);
428 printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d",
429 CAN_QUEUE, CMD_PER_LUN, PAS16_PUBLIC_RELEASE);
430 NCR5380_print_options(instance);
431 printk("\n");
432
433 ++current_override;
434 ++count;
435 }
436 return count;
437 }
438
439 /*
440 * Function : int pas16_biosparam(Disk *disk, kdev_t dev, int *ip)
441 *
442 * Purpose : Generates a BIOS / DOS compatible H-C-S mapping for
443 * the specified device / size.
444 *
445 * Inputs : size = size of device in sectors (512 bytes), dev = block device
446 * major / minor, ip[] = {heads, sectors, cylinders}
447 *
448 * Returns : always 0 (success), initializes ip
449 *
450 */
451
452 /*
453 * XXX Most SCSI boards use this mapping, I could be incorrect. Some one
454 * using hard disks on a trantor should verify that this mapping corresponds
455 * to that used by the BIOS / ASPI driver by running the linux fdisk program
456 * and matching the H_C_S coordinates to what DOS uses.
457 */
458
459 int pas16_biosparam(Disk * disk, kdev_t dev, int * ip)
/* */
460 {
461 int size = disk->capacity;
462 ip[0] = 64;
463 ip[1] = 32;
464 ip[2] = size >> 11; /* I think I have it as /(32*64) */
465 if( ip[2] > 1024 ) { /* yes, >, not >= */
466 ip[0]=255;
467 ip[1]=63;
468 ip[2]=size/(63*255);
469 if( ip[2] > 1023 ) /* yes >1023... */
470 ip[2] = 1023;
471 }
472
473 return 0;
474 }
475
476 /*
477 * Function : int NCR5380_pread (struct Scsi_Host *instance,
478 * unsigned char *dst, int len)
479 *
480 * Purpose : Fast 5380 pseudo-dma read function, transfers len bytes to
481 * dst
482 *
483 * Inputs : dst = destination, len = length in bytes
484 *
485 * Returns : 0 on success, non zero on a failure such as a watchdog
486 * timeout.
487 */
488
489 static inline int NCR5380_pread (struct Scsi_Host *instance, unsigned char *dst,
/* */
490 int len) {
491 register unsigned char *d = dst;
492 register unsigned short reg = (unsigned short) (instance->io_port +
493 P_DATA_REG_OFFSET);
494 register i = len;
495
496 while ( !(inb(instance->io_port + P_STATUS_REG_OFFSET) & P_ST_RDY) );
497
498 insb( reg, d, i );
499
500 if ( inb(instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET) & P_TS_TIM) {
501 outb( P_TS_CT, instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET);
502 printk("scsi%d : watchdog timer fired in NCR5380_pread()\n",
503 instance->host_no);
504 return -1;
505 } else
506 return 0;
507 }
508
509 /*
510 * Function : int NCR5380_pwrite (struct Scsi_Host *instance,
511 * unsigned char *src, int len)
512 *
513 * Purpose : Fast 5380 pseudo-dma write function, transfers len bytes from
514 * src
515 *
516 * Inputs : src = source, len = length in bytes
517 *
518 * Returns : 0 on success, non zero on a failure such as a watchdog
519 * timeout.
520 */
521
522 static inline int NCR5380_pwrite (struct Scsi_Host *instance, unsigned char *src,
/* ![[last]](../icons/n_last.png)
*/
523 int len) {
524 register unsigned char *s = src;
525 register unsigned short reg = (instance->io_port + P_DATA_REG_OFFSET);
526 register i = len;
527
528 while ( !((inb(instance->io_port + P_STATUS_REG_OFFSET)) & P_ST_RDY) );
529
530 outsb( reg, s, i );
531
532 if (inb(instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET) & P_TS_TIM) {
533 outb( P_TS_CT, instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET);
534 printk("scsi%d : watchdog timer fired in NCR5380_pwrite()\n",
535 instance->host_no);
536 return -1;
537 } else
538 return 0;
539 }
540
541 #include "NCR5380.c"
542
543 #ifdef MODULE
544 /* Eventually this will go into an include file, but this will be later */
545 Scsi_Host_Template driver_template = MV_PAS16;
546
547 #include <linux/module.h>
548 #include "scsi_module.c"
549 #endif
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*/