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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 #include <asm/system.h>
106 #include <linux/signal.h>
107 #include <linux/sched.h>
108 #include <asm/io.h>
109 #include "../block/blk.h"
110 #include "scsi.h"
111 #include "hosts.h"
112 #include "pas16.h"
113 #define AUTOPROBE_IRQ
114 #include "NCR5380.h"
115 #include "constants.h"
116 #include "sd.h"
117
118
119 int scsi_irq_translate[] =
120 { 0, 0, 1, 2, 3, 4, 5, 6, 0, 0, 7, 8, 9, 0, 10, 11 };
121
122 /* The default_irqs array contains values used to set the irq into the
123 * board via software (as must be done on newer model boards without
124 * irq jumpers on the board). The first value in the array will be
125 * assigned to logical board 0, the next to board 1, etc.
126 */
127 int default_irqs[] = { PAS16_DEFAULT_BOARD_1_IRQ,
128 PAS16_DEFAULT_BOARD_2_IRQ,
129 PAS16_DEFAULT_BOARD_3_IRQ,
130 PAS16_DEFAULT_BOARD_4_IRQ
131 };
132
133 static struct override {
134 unsigned short io_port;
135 int irq;
136 } overrides
137 #ifdef PAS16_OVERRIDE
138 [] = PAS16_OVERRIDE;
139 #else
140 [4] = {{0,IRQ_AUTO}, {0,IRQ_AUTO}, {0,IRQ_AUTO},
141 {0,IRQ_AUTO}};
142 #endif
143
144 #define NO_OVERRIDES (sizeof(overrides) / sizeof(struct override))
145
146 static struct base {
147 unsigned short io_port;
148 int noauto;
149 } bases[] = { {PAS16_DEFAULT_BASE_1, 0},
150 {PAS16_DEFAULT_BASE_2, 0},
151 {PAS16_DEFAULT_BASE_3, 0},
152 {PAS16_DEFAULT_BASE_4, 0}
153 };
154
155 #define NO_BASES (sizeof (bases) / sizeof (struct base))
156
157 unsigned short pas16_offset[ 8 ] =
158 {
159 0x1c00, /* OUTPUT_DATA_REG */
160 0x1c01, /* INITIATOR_COMMAND_REG */
161 0x1c02, /* MODE_REG */
162 0x1c03, /* TARGET_COMMAND_REG */
163 0x3c00, /* STATUS_REG ro, SELECT_ENABLE_REG wo */
164 0x3c01, /* BUS_AND_STATUS_REG ro, START_DMA_SEND_REG wo */
165 0x3c02, /* INPUT_DATA_REGISTER ro, (N/A on PAS16 ?)
166 * START_DMA_TARGET_RECEIVE_REG wo
167 */
168 0x3c03, /* RESET_PARITY_INTERRUPT_REG ro,
169 * START_DMA_INITIATOR_RECEIVE_REG wo
170 */
171 };
172
173
174
175 /*
176 * Function : enable_board( int board_num, unsigned short port )
177 *
178 * Purpose : set address in new model board
179 *
180 * Inputs : board_num - logical board number 0-3, port - base address
181 *
182 */
183
184 void enable_board( int board_num, unsigned short port )
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*/
185 {
186 outb( 0xbc + board_num, MASTER_ADDRESS_PTR );
187 outb( port >> 2, MASTER_ADDRESS_PTR );
188 }
189
190
191
192 /*
193 * Function : init_board( unsigned short port, int irq )
194 *
195 * Purpose : Set the board up to handle the SCSI interface
196 *
197 * Inputs : port - base address of the board,
198 * irq - irq to assign to the SCSI port
199 * force_irq - set it even if it conflicts with sound driver
200 *
201 */
202
203 void init_board( unsigned short io_port, int irq, int force_irq )
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204 {
205 unsigned int tmp;
206 unsigned int pas_irq_code;
207
208 /* Initialize the SCSI part of the board */
209
210 outb( 0x30, io_port + P_TIMEOUT_COUNTER_REG ); /* Timeout counter */
211 outb( 0x01, io_port + P_TIMEOUT_STATUS_REG_OFFSET ); /* Reset TC */
212 outb( 0x01, io_port + WAIT_STATE ); /* 1 Wait state */
213
214 NCR5380_read( RESET_PARITY_INTERRUPT_REG );
215
216 /* Set the SCSI interrupt pointer without mucking up the sound
217 * interrupt pointer in the same byte.
218 */
219 pas_irq_code = ( irq < 16 ) ? scsi_irq_translate[irq] : 0;
220 tmp = inb( io_port + IO_CONFIG_3 );
221
222 if( (( tmp & 0x0f ) == pas_irq_code) && pas_irq_code > 0
223 && !force_irq )
224 {
225 printk( "pas16: WARNING: Can't use same irq as sound "
226 "driver -- interrupts disabled\n" );
227 /* Set up the drive parameters, disable 5380 interrupts */
228 outb( 0x4d, io_port + SYS_CONFIG_4 );
229 }
230 else
231 {
232 tmp = ( tmp & 0x0f ) | ( pas_irq_code << 4 );
233 outb( tmp, io_port + IO_CONFIG_3 );
234
235 /* Set up the drive parameters and enable 5380 interrupts */
236 outb( 0x6d, io_port + SYS_CONFIG_4 );
237 }
238 }
239
240
241 /*
242 * Function : pas16_hw_detect( unsigned short board_num )
243 *
244 * Purpose : determine if a pas16 board is present
245 *
246 * Inputs : board_num - logical board number ( 0 - 3 )
247 *
248 * Returns : 0 if board not found, 1 if found.
249 */
250
251 int pas16_hw_detect( unsigned short board_num )
/* */
252 {
253 unsigned char board_rev, tmp;
254 unsigned short io_port = bases[ board_num ].io_port;
255
256 /* See if we can find a PAS16 board at the address associated
257 * with this logical board number.
258 */
259
260 /* First, attempt to take a newer model board out of reset and
261 * give it a base address. This shouldn't affect older boards.
262 */
263 enable_board( board_num, io_port );
264
265 /* Now see if it looks like a PAS16 board */
266 board_rev = inb( io_port + PCB_CONFIG );
267
268 if( board_rev == 0xff )
269 return 0;
270
271 tmp = board_rev ^ 0xe0;
272
273 outb( tmp, io_port + PCB_CONFIG );
274 tmp = inb( io_port + PCB_CONFIG );
275 outb( board_rev, io_port + PCB_CONFIG );
276
277 if( board_rev != tmp ) /* Not a PAS-16 */
278 return 0;
279
280 if( ( inb( io_port + OPERATION_MODE_1 ) & 0x03 ) != 0x03 )
281 return 0; /* return if no SCSI interface found */
282
283 /* Mediavision has some new model boards that return ID bits
284 * that indicate a SCSI interface, but they're not (LMS). We'll
285 * put in an additional test to try and weed them out.
286 */
287
288 outb( 0x01, io_port + WAIT_STATE ); /* 1 Wait state */
289 NCR5380_write( MODE_REG, 0x20 ); /* Is it really SCSI? */
290 if( NCR5380_read( MODE_REG ) != 0x20 ) /* Write to a reg. */
291 return 0; /* and try to read */
292 NCR5380_write( MODE_REG, 0x00 ); /* it back. */
293 if( NCR5380_read( MODE_REG ) != 0x00 )
294 return 0;
295
296 return 1;
297 }
298
299
300 /*
301 * Function : pas16_setup(char *str, int *ints)
302 *
303 * Purpose : LILO command line initialization of the overrides array,
304 *
305 * Inputs : str - unused, ints - array of integer parameters with ints[0]
306 * equal to the number of ints.
307 *
308 */
309
310 void pas16_setup(char *str, int *ints) {
/* */
311 static int commandline_current = 0;
312 int i;
313 if (ints[0] != 2)
314 printk("pas16_setup : usage pas16=io_port,irq\n");
315 else
316 if (commandline_current < NO_OVERRIDES) {
317 overrides[commandline_current].io_port = (unsigned short) ints[1];
318 overrides[commandline_current].irq = ints[2];
319 for (i = 0; i < NO_BASES; ++i)
320 if (bases[i].io_port == (unsigned short) ints[1]) {
321 bases[i].noauto = 1;
322 break;
323 }
324 ++commandline_current;
325 }
326 }
327
328 /*
329 * Function : int pas16_detect(Scsi_Host_Template * tpnt)
330 *
331 * Purpose : detects and initializes PAS16 controllers
332 * that were autoprobed, overridden on the LILO command line,
333 * or specified at compile time.
334 *
335 * Inputs : tpnt - template for this SCSI adapter.
336 *
337 * Returns : 1 if a host adapter was found, 0 if not.
338 *
339 */
340
341 int pas16_detect(Scsi_Host_Template * tpnt) {
/* */
342 static int current_override = 0;
343 static unsigned short current_base = 0;
344 struct Scsi_Host *instance;
345 unsigned short io_port;
346 int count;
347
348 for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
349 io_port = 0;
350
351 if (overrides[current_override].io_port)
352 {
353 io_port = overrides[current_override].io_port;
354 enable_board( current_override, io_port );
355 init_board( io_port, overrides[current_override].irq, 1 );
356 }
357 else
358 for (; !io_port && (current_base < NO_BASES); ++current_base) {
359 #if (PDEBUG & PDEBUG_INIT)
360 printk("scsi-pas16 : probing io_port %04x\n", (unsigned int) bases[current_base].io_port);
361 #endif
362 if ( !bases[current_base].noauto &&
363 pas16_hw_detect( current_base ) ){
364 io_port = bases[current_base].io_port;
365 init_board( io_port, default_irqs[ current_base ], 0 );
366 #if (PDEBUG & PDEBUG_INIT)
367 printk("scsi-pas16 : detected board.\n");
368 #endif
369 }
370 }
371
372
373 #if defined(PDEBUG) && (PDEBUG & PDEBUG_INIT)
374 printk("scsi-pas16 : io_port = %04x\n", (unsigned int) io_port);
375 #endif
376
377 if (!io_port)
378 break;
379
380 instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata));
381 instance->io_port = io_port;
382
383 NCR5380_init(instance, 0);
384
385 if (overrides[current_override].irq != IRQ_AUTO)
386 instance->irq = overrides[current_override].irq;
387 else
388 instance->irq = NCR5380_probe_irq(instance, PAS16_IRQS);
389
390 if (instance->irq != IRQ_NONE)
391 if (request_irq(instance->irq, pas16_intr, SA_INTERRUPT, "pas16")) {
392 printk("scsi%d : IRQ%d not free, interrupts disabled\n",
393 instance->host_no, instance->irq);
394 instance->irq = IRQ_NONE;
395 }
396
397 if (instance->irq == IRQ_NONE) {
398 printk("scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
399 printk("scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
400 /* Disable 5380 interrupts, leave drive params the same */
401 outb( 0x4d, io_port + SYS_CONFIG_4 );
402 outb( (inb(io_port + IO_CONFIG_3) & 0x0f), io_port + IO_CONFIG_3 );
403 }
404
405 #if defined(PDEBUG) && (PDEBUG & PDEBUG_INIT)
406 printk("scsi%d : irq = %d\n", instance->host_no, instance->irq);
407 #endif
408
409 printk("scsi%d : at 0x%04x", instance->host_no, (int)
410 instance->io_port);
411 if (instance->irq == IRQ_NONE)
412 printk (" interrupts disabled");
413 else
414 printk (" irq %d", instance->irq);
415 printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d",
416 CAN_QUEUE, CMD_PER_LUN, PAS16_PUBLIC_RELEASE);
417 NCR5380_print_options(instance);
418 printk("\n");
419
420 ++current_override;
421 ++count;
422 }
423 return count;
424 }
425
426 /*
427 * Function : int pas16_biosparam(Disk *disk, int dev, int *ip)
428 *
429 * Purpose : Generates a BIOS / DOS compatible H-C-S mapping for
430 * the specified device / size.
431 *
432 * Inputs : size = size of device in sectors (512 bytes), dev = block device
433 * major / minor, ip[] = {heads, sectors, cylinders}
434 *
435 * Returns : always 0 (success), initializes ip
436 *
437 */
438
439 /*
440 * XXX Most SCSI boards use this mapping, I could be incorrect. Some one
441 * using hard disks on a trantor should verify that this mapping corresponds
442 * to that used by the BIOS / ASPI driver by running the linux fdisk program
443 * and matching the H_C_S coordinates to what DOS uses.
444 */
445
446 int pas16_biosparam(Disk * disk, int dev, int * ip)
/* */
447 {
448 int size = disk->capacity;
449 ip[0] = 64;
450 ip[1] = 32;
451 ip[2] = size >> 11; /* I think I have it as /(32*64) */
452 if( ip[2] > 1024 ) { /* yes, >, not >= */
453 ip[0]=255;
454 ip[1]=63;
455 ip[2]=size/(63*255);
456 if( ip[2] > 1023 ) /* yes >1023... */
457 ip[2] = 1023;
458 }
459
460 return 0;
461 }
462
463 /*
464 * Function : int NCR5380_pread (struct Scsi_Host *instance,
465 * unsigned char *dst, int len)
466 *
467 * Purpose : Fast 5380 pseudo-dma read function, transfers len bytes to
468 * dst
469 *
470 * Inputs : dst = destination, len = length in bytes
471 *
472 * Returns : 0 on success, non zero on a failure such as a watchdog
473 * timeout.
474 */
475
476 static inline int NCR5380_pread (struct Scsi_Host *instance, unsigned char *dst,
/* */
477 int len) {
478 register unsigned char *d = dst;
479 register unsigned short reg = (unsigned short) (instance->io_port +
480 P_DATA_REG_OFFSET);
481 register i = len;
482
483 while ( !(inb(instance->io_port + P_STATUS_REG_OFFSET) & P_ST_RDY) );
484
485 insb( reg, d, i );
486
487 if ( inb(instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET) & P_TS_TIM) {
488 outb( P_TS_CT, instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET);
489 printk("scsi%d : watchdog timer fired in NCR5380_pread()\n",
490 instance->host_no);
491 return -1;
492 } else
493 return 0;
494 }
495
496 /*
497 * Function : int NCR5380_pwrite (struct Scsi_Host *instance,
498 * unsigned char *src, int len)
499 *
500 * Purpose : Fast 5380 pseudo-dma write function, transfers len bytes from
501 * src
502 *
503 * Inputs : src = source, len = length in bytes
504 *
505 * Returns : 0 on success, non zero on a failure such as a watchdog
506 * timeout.
507 */
508
509 static inline int NCR5380_pwrite (struct Scsi_Host *instance, unsigned char *src,
/* ![[last]](../icons/n_last.png)
*/
510 int len) {
511 register unsigned char *s = src;
512 register unsigned short reg = (instance->io_port + P_DATA_REG_OFFSET);
513 register i = len;
514
515 while ( !((inb(instance->io_port + P_STATUS_REG_OFFSET)) & P_ST_RDY) );
516
517 outsb( reg, s, i );
518
519 if (inb(instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET) & P_TS_TIM) {
520 outb( P_TS_CT, instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET);
521 printk("scsi%d : watchdog timer fired in NCR5380_pwrite()\n",
522 instance->host_no);
523 return -1;
524 } else
525 return 0;
526 }
527
528 #include "NCR5380.c"
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*/