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*/
1 #define AUTOSENSE
2 #define PSEUDO_DMA
3
4 /*
5 * This driver adapted from Drew Eckhardt's Trantor T128 driver
6 *
7 * Copyright 1993, Drew Eckhardt
8 * Visionary Computing
9 * (Unix and Linux consulting and custom programming)
10 * drew@colorado.edu
11 * +1 (303) 666-5836
12 *
13 * ( Based on T128 - DISTRIBUTION RELEASE 3. )
14 *
15 * Modified to work with the Pro Audio Spectrum/Studio 16
16 * by John Weidman.
17 *
18 *
19 * For more information, please consult
20 *
21 * Media Vision
22 * (510) 770-8600
23 * (800) 348-7116
24 *
25 * and
26 *
27 * NCR 5380 Family
28 * SCSI Protocol Controller
29 * Databook
30 *
31 * NCR Microelectronics
32 * 1635 Aeroplaza Drive
33 * Colorado Springs, CO 80916
34 * 1+ (719) 578-3400
35 * 1+ (800) 334-5454
36 */
37
38 /*
39 * Options :
40 * AUTOSENSE - if defined, REQUEST SENSE will be performed automatically
41 * for commands that return with a CHECK CONDITION status.
42 *
43 * PSEUDO_DMA - enables PSEUDO-DMA hardware, should give a 3-4X performance
44 * increase compared to polled I/O.
45 *
46 * PARITY - enable parity checking. Not supported.
47 *
48 * SCSI2 - enable support for SCSI-II tagged queueing. Untested.
49 *
50 *
51 * UNSAFE - leave interrupts enabled during pseudo-DMA transfers. You
52 * only really want to use this if you're having a problem with
53 * dropped characters during high speed communications, and even
54 * then, you're going to be better off twiddling with transfersize.
55 *
56 * USLEEP - enable support for devices that don't disconnect. Untested.
57 *
58 * The card is detected and initialized in one of several ways :
59 * 1. Autoprobe (default) - There are many different models of
60 * the Pro Audio Spectrum/Studio 16, and I only have one of
61 * them, so this may require a little tweaking. An interrupt
62 * is triggered to autoprobe for the interrupt line. Note:
63 * with the newer model boards, the interrupt is set via
64 * software after reset using the default_irq for the
65 * current board number.
66 *
67 *
68 * 2. With command line overrides - pas16=port,irq may be
69 * used on the LILO command line to override the defaults.
70 * NOTE: untested.
71 *
72 * 3. With the PAS16_OVERRIDE compile time define. This is
73 * specified as an array of address, irq tupples. Ie, for
74 * one board at the default 0x388 address, IRQ10, I could say
75 * -DPAS16_OVERRIDE={{0x388, 10}}
76 * NOTE: Also untested.
77 *
78 * Note that if the override methods are used, place holders must
79 * be specified for other boards in the system.
80 *
81 */
82
83 #include <asm/system.h>
84 #include <linux/signal.h>
85 #include <linux/sched.h>
86 #include <asm/io.h>
87 #include "../block/blk.h"
88 #include "scsi.h"
89 #include "hosts.h"
90 #include "pas16.h"
91 #define AUTOPROBE_IRQ
92 #include "NCR5380.h"
93 #include "constants.h"
94
95
96
97 int scsi_irq_translate[] =
98 { 0, 0, 1, 2, 3, 4, 5, 6, 0, 0, 7, 8, 9, 0, 10, 11 };
99
100 /* The default_irqs array contains values used to set the irq into the
101 * board via software (as must be done on newer model boards without
102 * irq jumpers on the board). The first value in the array will be
103 * assigned to logical board 0, the next to board 1, etc.
104 */
105 int default_irqs[] = { PAS16_DEFAULT_BOARD_1_IRQ,
106 PAS16_DEFAULT_BOARD_2_IRQ,
107 PAS16_DEFAULT_BOARD_3_IRQ,
108 PAS16_DEFAULT_BOARD_4_IRQ
109 };
110
111 static struct override {
112 unsigned short io_port;
113 int irq;
114 } overrides
115 #ifdef PAS16_OVERRIDE
116 [] = PAS16_OVERRIDE;
117 #else
118 [4] = {{0,IRQ_AUTO}, {0,IRQ_AUTO}, {0,IRQ_AUTO},
119 {0,IRQ_AUTO}};
120 #endif
121
122 #define NO_OVERRIDES (sizeof(overrides) / sizeof(struct override))
123
124 static struct base {
125 unsigned short io_port;
126 int noauto;
127 } bases[] = { {PAS16_DEFAULT_BASE_1, 0},
128 {PAS16_DEFAULT_BASE_2, 0},
129 {PAS16_DEFAULT_BASE_3, 0},
130 {PAS16_DEFAULT_BASE_4, 0}
131 };
132
133 #define NO_BASES (sizeof (bases) / sizeof (struct base))
134
135 unsigned short pas16_offset[ 8 ] =
136 {
137 0x1c00, /* OUTPUT_DATA_REG */
138 0x1c01, /* INITIATOR_COMMAND_REG */
139 0x1c02, /* MODE_REG */
140 0x1c03, /* TARGET_COMMAND_REG */
141 0x3c00, /* STATUS_REG ro, SELECT_ENABLE_REG wo */
142 0x3c01, /* BUS_AND_STATUS_REG ro, START_DMA_SEND_REG wo */
143 0x3c02, /* INPUT_DATA_REGISTER ro, (N/A on PAS16 ?)
144 * START_DMA_TARGET_RECIEVE_REG wo
145 */
146 0x3c03, /* RESET_PARITY_INTERRUPT_REG ro,
147 * START_DMA_INITIATOR_RECIEVE_REG wo
148 */
149 };
150
151
152
153 /*
154 * Function : enable_board( int board_num, unsigned short port )
155 *
156 * Purpose : set address in new model board
157 *
158 * Inputs : board_num - logical board number 0-3, port - base address
159 *
160 */
161
162 void enable_board( int board_num, unsigned short port )
/* ![[next]](../icons/right.png)
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*/
163 {
164 outb( 0xbc + board_num, MASTER_ADDRESS_PTR );
165 outb( port >> 2, MASTER_ADDRESS_PTR );
166 }
167
168
169
170 /*
171 * Function : init_board( unsigned short port, int irq )
172 *
173 * Purpose : Set the board up to handle the SCSI interface
174 *
175 * Inputs : port - base address of the board,
176 * irq - irq to assign to the SCSI port
177 *
178 */
179
180 void init_board( unsigned short io_port, int irq )
/* ![[previous]](../icons/left.png)
*/
181 {
182 unsigned int tmp;
183
184 /* Initialize the SCSI part of the board */
185
186 outb( 0x30, io_port + P_TIMEOUT_COUNTER_REG ); /* Timeout counter */
187 outb( 0x01, io_port + P_TIMEOUT_STATUS_REG_OFFSET ); /* Reset TC */
188 outb( 0x01, io_port + WAIT_STATE ); /* 1 Wait state */
189
190 NCR5380_read( RESET_PARITY_INTERRUPT_REG );
191
192 /* Set the SCSI interrupt pointer without mucking up the sound
193 * interrupt pointer in the same byte.
194 */
195 tmp = inb( io_port + IO_CONFIG_3 );
196 tmp = ( tmp & 0x0f ) | ( scsi_irq_translate[irq] << 4 );
197 outb( tmp, io_port + IO_CONFIG_3 );
198
199 /* Set up the drive parameters and enable 5380 interrupts */
200 outb( 0x6d, io_port + SYS_CONFIG_4 );
201 }
202
203
204 /*
205 * Function : pas16_hw_detect( unsigned short board_num )
206 *
207 * Purpose : determine if a pas16 board is present
208 *
209 * Inputs : board_num - logical board number ( 0 - 3 )
210 *
211 * Returns : 0 if board not found, 1 if found.
212 */
213
214 int pas16_hw_detect( unsigned short board_num )
/* */
215 {
216 unsigned char board_rev, tmp;
217 unsigned short port = bases[ board_num ].io_port;
218
219 /* See if we can find a PAS16 board at the address associated
220 * with this logical board number.
221 */
222
223 /* First, attempt to take a newer model board out of reset and
224 * give it a base address. This shouldn't affect older boards.
225 */
226 enable_board( board_num, port );
227
228 /* Now see if it looks like a PAS16 board */
229 board_rev = inb( port + PCB_CONFIG );
230
231 if( board_rev == 0xff )
232 return 0;
233
234 tmp = board_rev ^ 0xe0;
235
236 outb( tmp, port + PCB_CONFIG );
237 tmp = inb( port + PCB_CONFIG );
238 outb( board_rev, port + PCB_CONFIG );
239
240 if( board_rev != tmp ) /* Not a PAS-16 */
241 return 0;
242
243 if( ( inb( port + OPERATION_MODE_1 ) & 0x03 ) != 0x03 )
244 return 0; /* return if no SCSI interface found */
245
246 return 1;
247 }
248
249
250 /*
251 * Function : pas16_setup(char *str, int *ints)
252 *
253 * Purpose : LILO command line initialization of the overrides array,
254 *
255 * Inputs : str - unused, ints - array of integer paramters with ints[0]
256 * equal to the number of ints.
257 *
258 */
259
260 void pas16_setup(char *str, int *ints) {
/* */
261 static int commandline_current = 0;
262 int i;
263 if (ints[0] != 2)
264 printk("pas16_setup : usage pas16=io_port,irq\n");
265 else
266 if (commandline_current < NO_OVERRIDES) {
267 overrides[commandline_current].io_port = (unsigned short) ints[1];
268 overrides[commandline_current].irq = ints[2];
269 for (i = 0; i < NO_BASES; ++i)
270 if (bases[i].io_port == (unsigned short) ints[1]) {
271 bases[i].noauto = 1;
272 break;
273 }
274 ++commandline_current;
275 }
276 }
277
278 static struct sigaction pas16_sigaction = { pas16_intr, 0, SA_INTERRUPT , NULL };
279
280 /*
281 * Function : int pas16_detect(int hostno)
282 *
283 * Purpose : detects and initializes PAS16 controllers
284 * that were autoprobed, overriden on the LILO command line,
285 * or specified at compile time.
286 *
287 * Inputs : hostno - id of this SCSI adapter.
288 *
289 * Returns : 1 if a host adapter was found, 0 if not.
290 *
291 */
292
293 int pas16_detect(int hostno) {
/* */
294 static int current_override = 0;
295 static unsigned short current_base = 0;
296 struct Scsi_Host *instance;
297 unsigned short io_port;
298 int count;
299
300 for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
301 io_port = 0;
302
303 if (overrides[current_override].io_port)
304 {
305 io_port = overrides[current_override].io_port;
306 enable_board( current_override, io_port );
307 init_board( io_port, overrides[current_override].irq );
308 }
309 else
310 for (; !io_port && (current_base < NO_BASES); ++current_base) {
311 #if (PDEBUG & PDEBUG_INIT)
312 printk("scsi%d : probing io_port %04x\n", hostno, (unsigned int) bases[current_base].io_port);
313 #endif
314 if ( !bases[current_base].noauto &&
315 pas16_hw_detect( current_base ) ){
316 io_port = bases[current_base].io_port;
317 init_board( io_port, default_irqs[ current_base ] );
318 #if (PDEBUG & PDEBUG_INIT)
319 printk("scsi%d : detected board.\n", hostno);
320 #endif
321 }
322 }
323
324
325 #if defined(PDEBUG) && (PDEBUG & PDEBUG_INIT)
326 printk("scsi%d : io_port = %04x\n", hostno, (unsigned int) io_port);
327 #endif
328
329 if (!io_port)
330 break;
331
332 instance = scsi_register (hostno, sizeof(struct NCR5380_hostdata));
333 instance->io_port = io_port;
334
335 NCR5380_init(instance);
336
337 if (overrides[current_override].irq != IRQ_AUTO)
338 instance->irq = overrides[current_override].irq;
339 else
340 instance->irq = NCR5380_probe_irq(instance, PAS16_IRQS);
341
342 if (instance->irq != IRQ_NONE)
343 if (irqaction (instance->irq, &pas16_sigaction)) {
344 printk("scsi%d : IRQ%d not free, interrupts disabled\n",
345 hostno, instance->irq);
346 instance->irq = IRQ_NONE;
347 }
348
349 if (instance->irq == IRQ_NONE) {
350 printk("scsi%d : interrupts not enabled. for better interactive performance,\n", hostno);
351 printk("scsi%d : please jumper the board for a free IRQ.\n", hostno);
352 }
353
354 #if defined(PDEBUG) && (PDEBUG & PDEBUG_INIT)
355 printk("scsi%d : irq = %d\n", hostno, instance->irq);
356 #endif
357
358 printk("scsi%d : at 0x%04x", instance->host_no, (int)
359 instance->io_port);
360 if (instance->irq == IRQ_NONE)
361 printk (" interrupts disabled");
362 else
363 printk (" irq %d", instance->irq);
364 printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d",
365 CAN_QUEUE, CMD_PER_LUN, PAS16_PUBLIC_RELEASE);
366 NCR5380_print_options(instance);
367 printk("\n");
368
369 ++current_override;
370 ++count;
371 ++hostno;
372 }
373 return count;
374 }
375
376 /*
377 * Function : int pas16_biosparam(int size, int dev, int *ip)
378 *
379 * Purpose : Generates a BIOS / DOS compatable H-C-S mapping for
380 * the specified device / size.
381 *
382 * Inputs : size = size of device in sectors (512 bytes), dev = block device
383 * major / minor, ip[] = {heads, sectors, cylinders}
384 *
385 * Returns : allways 0 (success), initializes ip
386 *
387 */
388
389 /*
390 * XXX Most SCSI boards use this mapping, I could be incorrect. Some one
391 * using hard disks on a trantor should verify that this mapping corresponds
392 * to that used by the BIOS / ASPI driver by running the linux fdisk program
393 * and matching the H_C_S coordinates to what DOS uses.
394 */
395
396 int pas16_biosparam(int size, int dev, int * ip)
/* */
397 {
398 ip[0] = 64;
399 ip[1] = 32;
400 ip[2] = size >> 11;
401 return 0;
402 }
403
404 /*
405 * Function : int NCR5380_pread (struct Scsi_Host *instance,
406 * unsigned char *dst, int len)
407 *
408 * Purpose : Fast 5380 pseudo-dma read function, transfers len bytes to
409 * dst
410 *
411 * Inputs : dst = destination, len = length in bytes
412 *
413 * Returns : 0 on success, non zero on a failure such as a watchdog
414 * timeout.
415 */
416
417 static inline int NCR5380_pread (struct Scsi_Host *instance, unsigned char *dst,
/* */
418 int len) {
419 register unsigned char *d = dst;
420 register unsigned short reg = (unsigned short) (instance->io_port +
421 P_DATA_REG_OFFSET);
422 register i = len;
423
424 while ( inb(instance->io_port + P_STATUS_REG_OFFSET) & P_ST_RDY );
425
426 for (; i; --i)
427 *d++ = (unsigned char) inb(reg);
428
429 if ( inb(instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET) & P_TS_TIM) {
430 outb( P_TS_CT, instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET);
431 printk("scsi%d : watchdog timer fired in NCR5480_pread()\n",
432 instance->host_no);
433 return -1;
434 } else
435 return 0;
436 }
437
438 /*
439 * Function : int NCR5380_pwrite (struct Scsi_Host *instance,
440 * unsigned char *src, int len)
441 *
442 * Purpose : Fast 5380 pseudo-dma write function, transfers len bytes from
443 * src
444 *
445 * Inputs : src = source, len = length in bytes
446 *
447 * Returns : 0 on success, non zero on a failure such as a watchdog
448 * timeout.
449 */
450
451 static inline int NCR5380_pwrite (struct Scsi_Host *instance, unsigned char *src,
/* */
452 int len) {
453 register unsigned char *s = src;
454 register unsigned short reg = (instance->io_port + P_DATA_REG_OFFSET);
455 register i = len;
456
457 while ( ( inb( instance->io_port + P_STATUS_REG_OFFSET ) ) & P_ST_RDY );
458 for (; i; --i)
459 outb( *s++, reg );
460
461 if (inb(instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET) & P_TS_TIM) {
462 outb( P_TS_CT, instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET);
463 printk("scsi%d : watchdog timer fired in NCR5480_pwrite()\n",
464 instance->host_no);
465 return -1;
466 } else
467 return 0;
468 }
469
470 /*
471 * Function : const char *pas16_info(void)
472 *
473 * Purpose : provide furthur information about this driver.
474 *
475 * Returns : an empty string.
476 */
477
478 const char *pas16_info (void) {
/* ![[last]](../icons/n_last.png)
*/
479 static const char string[]="";
480 return string;
481 }
482
483 #include "NCR5380.c"
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*/