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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 "../block/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
124 int scsi_irq_translate[] =
125 { 0, 0, 1, 2, 3, 4, 5, 6, 0, 0, 7, 8, 9, 0, 10, 11 };
126
127 /* The default_irqs array contains values used to set the irq into the
128 * board via software (as must be done on newer model boards without
129 * irq jumpers on the board). The first value in the array will be
130 * assigned to logical board 0, the next to board 1, etc.
131 */
132 int default_irqs[] = { PAS16_DEFAULT_BOARD_1_IRQ,
133 PAS16_DEFAULT_BOARD_2_IRQ,
134 PAS16_DEFAULT_BOARD_3_IRQ,
135 PAS16_DEFAULT_BOARD_4_IRQ
136 };
137
138 static struct override {
139 unsigned short io_port;
140 int irq;
141 } overrides
142 #ifdef PAS16_OVERRIDE
143 [] = PAS16_OVERRIDE;
144 #else
145 [4] = {{0,IRQ_AUTO}, {0,IRQ_AUTO}, {0,IRQ_AUTO},
146 {0,IRQ_AUTO}};
147 #endif
148
149 #define NO_OVERRIDES (sizeof(overrides) / sizeof(struct override))
150
151 static struct base {
152 unsigned short io_port;
153 int noauto;
154 } bases[] = { {PAS16_DEFAULT_BASE_1, 0},
155 {PAS16_DEFAULT_BASE_2, 0},
156 {PAS16_DEFAULT_BASE_3, 0},
157 {PAS16_DEFAULT_BASE_4, 0}
158 };
159
160 #define NO_BASES (sizeof (bases) / sizeof (struct base))
161
162 unsigned short pas16_offset[ 8 ] =
163 {
164 0x1c00, /* OUTPUT_DATA_REG */
165 0x1c01, /* INITIATOR_COMMAND_REG */
166 0x1c02, /* MODE_REG */
167 0x1c03, /* TARGET_COMMAND_REG */
168 0x3c00, /* STATUS_REG ro, SELECT_ENABLE_REG wo */
169 0x3c01, /* BUS_AND_STATUS_REG ro, START_DMA_SEND_REG wo */
170 0x3c02, /* INPUT_DATA_REGISTER ro, (N/A on PAS16 ?)
171 * START_DMA_TARGET_RECEIVE_REG wo
172 */
173 0x3c03, /* RESET_PARITY_INTERRUPT_REG ro,
174 * START_DMA_INITIATOR_RECEIVE_REG wo
175 */
176 };
177
178
179
180 /*
181 * Function : enable_board( int board_num, unsigned short port )
182 *
183 * Purpose : set address in new model board
184 *
185 * Inputs : board_num - logical board number 0-3, port - base address
186 *
187 */
188
189 void enable_board( int board_num, unsigned short port )
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*/
190 {
191 outb( 0xbc + board_num, MASTER_ADDRESS_PTR );
192 outb( port >> 2, MASTER_ADDRESS_PTR );
193 }
194
195
196
197 /*
198 * Function : init_board( unsigned short port, int irq )
199 *
200 * Purpose : Set the board up to handle the SCSI interface
201 *
202 * Inputs : port - base address of the board,
203 * irq - irq to assign to the SCSI port
204 * force_irq - set it even if it conflicts with sound driver
205 *
206 */
207
208 void init_board( unsigned short io_port, int irq, int force_irq )
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*/
209 {
210 unsigned int tmp;
211 unsigned int pas_irq_code;
212
213 /* Initialize the SCSI part of the board */
214
215 outb( 0x30, io_port + P_TIMEOUT_COUNTER_REG ); /* Timeout counter */
216 outb( 0x01, io_port + P_TIMEOUT_STATUS_REG_OFFSET ); /* Reset TC */
217 outb( 0x01, io_port + WAIT_STATE ); /* 1 Wait state */
218
219 NCR5380_read( RESET_PARITY_INTERRUPT_REG );
220
221 /* Set the SCSI interrupt pointer without mucking up the sound
222 * interrupt pointer in the same byte.
223 */
224 pas_irq_code = ( irq < 16 ) ? scsi_irq_translate[irq] : 0;
225 tmp = inb( io_port + IO_CONFIG_3 );
226
227 if( (( tmp & 0x0f ) == pas_irq_code) && pas_irq_code > 0
228 && !force_irq )
229 {
230 printk( "pas16: WARNING: Can't use same irq as sound "
231 "driver -- interrupts disabled\n" );
232 /* Set up the drive parameters, disable 5380 interrupts */
233 outb( 0x4d, io_port + SYS_CONFIG_4 );
234 }
235 else
236 {
237 tmp = ( tmp & 0x0f ) | ( pas_irq_code << 4 );
238 outb( tmp, io_port + IO_CONFIG_3 );
239
240 /* Set up the drive parameters and enable 5380 interrupts */
241 outb( 0x6d, io_port + SYS_CONFIG_4 );
242 }
243 }
244
245
246 /*
247 * Function : pas16_hw_detect( unsigned short board_num )
248 *
249 * Purpose : determine if a pas16 board is present
250 *
251 * Inputs : board_num - logical board number ( 0 - 3 )
252 *
253 * Returns : 0 if board not found, 1 if found.
254 */
255
256 int pas16_hw_detect( unsigned short board_num )
/* */
257 {
258 unsigned char board_rev, tmp;
259 unsigned short io_port = bases[ board_num ].io_port;
260
261 /* See if we can find a PAS16 board at the address associated
262 * with this logical board number.
263 */
264
265 /* First, attempt to take a newer model board out of reset and
266 * give it a base address. This shouldn't affect older boards.
267 */
268 enable_board( board_num, io_port );
269
270 /* Now see if it looks like a PAS16 board */
271 board_rev = inb( io_port + PCB_CONFIG );
272
273 if( board_rev == 0xff )
274 return 0;
275
276 tmp = board_rev ^ 0xe0;
277
278 outb( tmp, io_port + PCB_CONFIG );
279 tmp = inb( io_port + PCB_CONFIG );
280 outb( board_rev, io_port + PCB_CONFIG );
281
282 if( board_rev != tmp ) /* Not a PAS-16 */
283 return 0;
284
285 if( ( inb( io_port + OPERATION_MODE_1 ) & 0x03 ) != 0x03 )
286 return 0; /* return if no SCSI interface found */
287
288 /* Mediavision has some new model boards that return ID bits
289 * that indicate a SCSI interface, but they're not (LMS). We'll
290 * put in an additional test to try and weed them out.
291 */
292
293 outb( 0x01, io_port + WAIT_STATE ); /* 1 Wait state */
294 NCR5380_write( MODE_REG, 0x20 ); /* Is it really SCSI? */
295 if( NCR5380_read( MODE_REG ) != 0x20 ) /* Write to a reg. */
296 return 0; /* and try to read */
297 NCR5380_write( MODE_REG, 0x00 ); /* it back. */
298 if( NCR5380_read( MODE_REG ) != 0x00 )
299 return 0;
300
301 return 1;
302 }
303
304
305 /*
306 * Function : pas16_setup(char *str, int *ints)
307 *
308 * Purpose : LILO command line initialization of the overrides array,
309 *
310 * Inputs : str - unused, ints - array of integer parameters with ints[0]
311 * equal to the number of ints.
312 *
313 */
314
315 void pas16_setup(char *str, int *ints) {
/* */
316 static int commandline_current = 0;
317 int i;
318 if (ints[0] != 2)
319 printk("pas16_setup : usage pas16=io_port,irq\n");
320 else
321 if (commandline_current < NO_OVERRIDES) {
322 overrides[commandline_current].io_port = (unsigned short) ints[1];
323 overrides[commandline_current].irq = ints[2];
324 for (i = 0; i < NO_BASES; ++i)
325 if (bases[i].io_port == (unsigned short) ints[1]) {
326 bases[i].noauto = 1;
327 break;
328 }
329 ++commandline_current;
330 }
331 }
332
333 /*
334 * Function : int pas16_detect(Scsi_Host_Template * tpnt)
335 *
336 * Purpose : detects and initializes PAS16 controllers
337 * that were autoprobed, overridden on the LILO command line,
338 * or specified at compile time.
339 *
340 * Inputs : tpnt - template for this SCSI adapter.
341 *
342 * Returns : 1 if a host adapter was found, 0 if not.
343 *
344 */
345
346 int pas16_detect(Scsi_Host_Template * tpnt) {
/* */
347 static int current_override = 0;
348 static unsigned short current_base = 0;
349 struct Scsi_Host *instance;
350 unsigned short io_port;
351 int count;
352
353 for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
354 io_port = 0;
355
356 if (overrides[current_override].io_port)
357 {
358 io_port = overrides[current_override].io_port;
359 enable_board( current_override, io_port );
360 init_board( io_port, overrides[current_override].irq, 1 );
361 }
362 else
363 for (; !io_port && (current_base < NO_BASES); ++current_base) {
364 #if (PDEBUG & PDEBUG_INIT)
365 printk("scsi-pas16 : probing io_port %04x\n", (unsigned int) bases[current_base].io_port);
366 #endif
367 if ( !bases[current_base].noauto &&
368 pas16_hw_detect( current_base ) ){
369 io_port = bases[current_base].io_port;
370 init_board( io_port, default_irqs[ current_base ], 0 );
371 #if (PDEBUG & PDEBUG_INIT)
372 printk("scsi-pas16 : detected board.\n");
373 #endif
374 }
375 }
376
377
378 #if defined(PDEBUG) && (PDEBUG & PDEBUG_INIT)
379 printk("scsi-pas16 : io_port = %04x\n", (unsigned int) io_port);
380 #endif
381
382 if (!io_port)
383 break;
384
385 instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata));
386 instance->io_port = io_port;
387
388 NCR5380_init(instance, 0);
389
390 if (overrides[current_override].irq != IRQ_AUTO)
391 instance->irq = overrides[current_override].irq;
392 else
393 instance->irq = NCR5380_probe_irq(instance, PAS16_IRQS);
394
395 if (instance->irq != IRQ_NONE)
396 if (request_irq(instance->irq, pas16_intr, SA_INTERRUPT, "pas16")) {
397 printk("scsi%d : IRQ%d not free, interrupts disabled\n",
398 instance->host_no, instance->irq);
399 instance->irq = IRQ_NONE;
400 }
401
402 if (instance->irq == IRQ_NONE) {
403 printk("scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
404 printk("scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
405 /* Disable 5380 interrupts, leave drive params the same */
406 outb( 0x4d, io_port + SYS_CONFIG_4 );
407 outb( (inb(io_port + IO_CONFIG_3) & 0x0f), io_port + IO_CONFIG_3 );
408 }
409
410 #if defined(PDEBUG) && (PDEBUG & PDEBUG_INIT)
411 printk("scsi%d : irq = %d\n", instance->host_no, instance->irq);
412 #endif
413
414 printk("scsi%d : at 0x%04x", instance->host_no, (int)
415 instance->io_port);
416 if (instance->irq == IRQ_NONE)
417 printk (" interrupts disabled");
418 else
419 printk (" irq %d", instance->irq);
420 printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d",
421 CAN_QUEUE, CMD_PER_LUN, PAS16_PUBLIC_RELEASE);
422 NCR5380_print_options(instance);
423 printk("\n");
424
425 ++current_override;
426 ++count;
427 }
428 return count;
429 }
430
431 /*
432 * Function : int pas16_biosparam(Disk *disk, int dev, int *ip)
433 *
434 * Purpose : Generates a BIOS / DOS compatible H-C-S mapping for
435 * the specified device / size.
436 *
437 * Inputs : size = size of device in sectors (512 bytes), dev = block device
438 * major / minor, ip[] = {heads, sectors, cylinders}
439 *
440 * Returns : always 0 (success), initializes ip
441 *
442 */
443
444 /*
445 * XXX Most SCSI boards use this mapping, I could be incorrect. Some one
446 * using hard disks on a trantor should verify that this mapping corresponds
447 * to that used by the BIOS / ASPI driver by running the linux fdisk program
448 * and matching the H_C_S coordinates to what DOS uses.
449 */
450
451 int pas16_biosparam(Disk * disk, int dev, int * ip)
/* */
452 {
453 int size = disk->capacity;
454 ip[0] = 64;
455 ip[1] = 32;
456 ip[2] = size >> 11; /* I think I have it as /(32*64) */
457 if( ip[2] > 1024 ) { /* yes, >, not >= */
458 ip[0]=255;
459 ip[1]=63;
460 ip[2]=size/(63*255);
461 if( ip[2] > 1023 ) /* yes >1023... */
462 ip[2] = 1023;
463 }
464
465 return 0;
466 }
467
468 /*
469 * Function : int NCR5380_pread (struct Scsi_Host *instance,
470 * unsigned char *dst, int len)
471 *
472 * Purpose : Fast 5380 pseudo-dma read function, transfers len bytes to
473 * dst
474 *
475 * Inputs : dst = destination, len = length in bytes
476 *
477 * Returns : 0 on success, non zero on a failure such as a watchdog
478 * timeout.
479 */
480
481 static inline int NCR5380_pread (struct Scsi_Host *instance, unsigned char *dst,
/* */
482 int len) {
483 register unsigned char *d = dst;
484 register unsigned short reg = (unsigned short) (instance->io_port +
485 P_DATA_REG_OFFSET);
486 register i = len;
487
488 while ( !(inb(instance->io_port + P_STATUS_REG_OFFSET) & P_ST_RDY) );
489
490 insb( reg, d, i );
491
492 if ( inb(instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET) & P_TS_TIM) {
493 outb( P_TS_CT, instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET);
494 printk("scsi%d : watchdog timer fired in NCR5380_pread()\n",
495 instance->host_no);
496 return -1;
497 } else
498 return 0;
499 }
500
501 /*
502 * Function : int NCR5380_pwrite (struct Scsi_Host *instance,
503 * unsigned char *src, int len)
504 *
505 * Purpose : Fast 5380 pseudo-dma write function, transfers len bytes from
506 * src
507 *
508 * Inputs : src = source, len = length in bytes
509 *
510 * Returns : 0 on success, non zero on a failure such as a watchdog
511 * timeout.
512 */
513
514 static inline int NCR5380_pwrite (struct Scsi_Host *instance, unsigned char *src,
/* ![[last]](../icons/n_last.png)
*/
515 int len) {
516 register unsigned char *s = src;
517 register unsigned short reg = (instance->io_port + P_DATA_REG_OFFSET);
518 register i = len;
519
520 while ( !((inb(instance->io_port + P_STATUS_REG_OFFSET)) & P_ST_RDY) );
521
522 outsb( reg, s, i );
523
524 if (inb(instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET) & P_TS_TIM) {
525 outb( P_TS_CT, instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET);
526 printk("scsi%d : watchdog timer fired in NCR5380_pwrite()\n",
527 instance->host_no);
528 return -1;
529 } else
530 return 0;
531 }
532
533 #include "NCR5380.c"
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*/