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1#define PSEUDO_DMA
2
3/*
4 * This driver adapted from Drew Eckhardt's Trantor T128 driver
5 *
6 * Copyright 1993, Drew Eckhardt
7 * Visionary Computing
8 * (Unix and Linux consulting and custom programming)
9 * drew@colorado.edu
10 * +1 (303) 666-5836
11 *
12 * ( Based on T128 - DISTRIBUTION RELEASE 3. )
13 *
14 * Modified to work with the Pro Audio Spectrum/Studio 16
15 * by John Weidman.
16 *
17 *
18 * For more information, please consult
19 *
20 * Media Vision
21 * (510) 770-8600
22 * (800) 348-7116
23 */
24
25/*
26 * The card is detected and initialized in one of several ways :
27 * 1. Autoprobe (default) - There are many different models of
28 * the Pro Audio Spectrum/Studio 16, and I only have one of
29 * them, so this may require a little tweaking. An interrupt
30 * is triggered to autoprobe for the interrupt line. Note:
31 * with the newer model boards, the interrupt is set via
32 * software after reset using the default_irq for the
33 * current board number.
34 *
35 * 2. With command line overrides - pas16=port,irq may be
36 * used on the LILO command line to override the defaults.
37 *
38 * 3. With the PAS16_OVERRIDE compile time define. This is
39 * specified as an array of address, irq tuples. Ie, for
40 * one board at the default 0x388 address, IRQ10, I could say
41 * -DPAS16_OVERRIDE={{0x388, 10}}
42 * NOTE: Untested.
43 *
44 * 4. When included as a module, with arguments passed on the command line:
45 * pas16_irq=xx the interrupt
46 * pas16_addr=xx the port
47 * e.g. "modprobe pas16 pas16_addr=0x388 pas16_irq=5"
48 *
49 * Note that if the override methods are used, place holders must
50 * be specified for other boards in the system.
51 *
52 *
53 * Configuration notes :
54 * The current driver does not support interrupt sharing with the
55 * sound portion of the card. If you use the same irq for the
56 * scsi port and sound you will have problems. Either use
57 * a different irq for the scsi port or don't use interrupts
58 * for the scsi port.
59 *
60 * If you have problems with your card not being recognized, use
61 * the LILO command line override. Try to get it recognized without
62 * interrupts. Ie, for a board at the default 0x388 base port,
63 * boot: linux pas16=0x388,0
64 *
65 * NO_IRQ (0) should be specified for no interrupt,
66 * IRQ_AUTO (254) to autoprobe for an IRQ line if overridden
67 * on the command line.
68 */
69
70#include <linux/module.h>
71
72#include <asm/io.h>
73#include <asm/dma.h>
74#include <linux/blkdev.h>
75#include <linux/interrupt.h>
76#include <linux/init.h>
77
78#include <scsi/scsi_host.h>
79#include "pas16.h"
80#define AUTOPROBE_IRQ
81#include "NCR5380.h"
82
83
84static unsigned short pas16_addr;
85static int pas16_irq;
86
87
88static const int scsi_irq_translate[] =
89 { 0, 0, 1, 2, 3, 4, 5, 6, 0, 0, 7, 8, 9, 0, 10, 11 };
90
91/* The default_irqs array contains values used to set the irq into the
92 * board via software (as must be done on newer model boards without
93 * irq jumpers on the board). The first value in the array will be
94 * assigned to logical board 0, the next to board 1, etc.
95 */
96static int default_irqs[] __initdata =
97 { PAS16_DEFAULT_BOARD_1_IRQ,
98 PAS16_DEFAULT_BOARD_2_IRQ,
99 PAS16_DEFAULT_BOARD_3_IRQ,
100 PAS16_DEFAULT_BOARD_4_IRQ
101 };
102
103static struct override {
104 unsigned short io_port;
105 int irq;
106} overrides
107#ifdef PAS16_OVERRIDE
108 [] __initdata = PAS16_OVERRIDE;
109#else
110 [4] __initdata = {{0,IRQ_AUTO}, {0,IRQ_AUTO}, {0,IRQ_AUTO},
111 {0,IRQ_AUTO}};
112#endif
113
114#define NO_OVERRIDES ARRAY_SIZE(overrides)
115
116static struct base {
117 unsigned short io_port;
118 int noauto;
119} bases[] __initdata =
120 { {PAS16_DEFAULT_BASE_1, 0},
121 {PAS16_DEFAULT_BASE_2, 0},
122 {PAS16_DEFAULT_BASE_3, 0},
123 {PAS16_DEFAULT_BASE_4, 0}
124 };
125
126#define NO_BASES ARRAY_SIZE(bases)
127
128static const unsigned short pas16_offset[ 8 ] =
129 {
130 0x1c00, /* OUTPUT_DATA_REG */
131 0x1c01, /* INITIATOR_COMMAND_REG */
132 0x1c02, /* MODE_REG */
133 0x1c03, /* TARGET_COMMAND_REG */
134 0x3c00, /* STATUS_REG ro, SELECT_ENABLE_REG wo */
135 0x3c01, /* BUS_AND_STATUS_REG ro, START_DMA_SEND_REG wo */
136 0x3c02, /* INPUT_DATA_REGISTER ro, (N/A on PAS16 ?)
137 * START_DMA_TARGET_RECEIVE_REG wo
138 */
139 0x3c03, /* RESET_PARITY_INTERRUPT_REG ro,
140 * START_DMA_INITIATOR_RECEIVE_REG wo
141 */
142 };
143
144
145/*
146 * Function : enable_board( int board_num, unsigned short port )
147 *
148 * Purpose : set address in new model board
149 *
150 * Inputs : board_num - logical board number 0-3, port - base address
151 *
152 */
153
154static void __init
155 enable_board( int board_num, unsigned short port )
156{
157 outb( 0xbc + board_num, MASTER_ADDRESS_PTR );
158 outb( port >> 2, MASTER_ADDRESS_PTR );
159}
160
161
162
163/*
164 * Function : init_board( unsigned short port, int irq )
165 *
166 * Purpose : Set the board up to handle the SCSI interface
167 *
168 * Inputs : port - base address of the board,
169 * irq - irq to assign to the SCSI port
170 * force_irq - set it even if it conflicts with sound driver
171 *
172 */
173
174static void __init
175 init_board( unsigned short io_port, int irq, int force_irq )
176{
177 unsigned int tmp;
178 unsigned int pas_irq_code;
179
180 /* Initialize the SCSI part of the board */
181
182 outb( 0x30, io_port + P_TIMEOUT_COUNTER_REG ); /* Timeout counter */
183 outb( 0x01, io_port + P_TIMEOUT_STATUS_REG_OFFSET ); /* Reset TC */
184 outb( 0x01, io_port + WAIT_STATE ); /* 1 Wait state */
185
186 inb(io_port + pas16_offset[RESET_PARITY_INTERRUPT_REG]);
187
188 /* Set the SCSI interrupt pointer without mucking up the sound
189 * interrupt pointer in the same byte.
190 */
191 pas_irq_code = ( irq < 16 ) ? scsi_irq_translate[irq] : 0;
192 tmp = inb( io_port + IO_CONFIG_3 );
193
194 if( (( tmp & 0x0f ) == pas_irq_code) && pas_irq_code > 0
195 && !force_irq )
196 {
197 printk( "pas16: WARNING: Can't use same irq as sound "
198 "driver -- interrupts disabled\n" );
199 /* Set up the drive parameters, disable 5380 interrupts */
200 outb( 0x4d, io_port + SYS_CONFIG_4 );
201 }
202 else
203 {
204 tmp = ( tmp & 0x0f ) | ( pas_irq_code << 4 );
205 outb( tmp, io_port + IO_CONFIG_3 );
206
207 /* Set up the drive parameters and enable 5380 interrupts */
208 outb( 0x6d, io_port + SYS_CONFIG_4 );
209 }
210}
211
212
213/*
214 * Function : pas16_hw_detect( unsigned short board_num )
215 *
216 * Purpose : determine if a pas16 board is present
217 *
218 * Inputs : board_num - logical board number ( 0 - 3 )
219 *
220 * Returns : 0 if board not found, 1 if found.
221 */
222
223static int __init
224 pas16_hw_detect( unsigned short board_num )
225{
226 unsigned char board_rev, tmp;
227 unsigned short io_port = bases[ board_num ].io_port;
228
229 /* See if we can find a PAS16 board at the address associated
230 * with this logical board number.
231 */
232
233 /* First, attempt to take a newer model board out of reset and
234 * give it a base address. This shouldn't affect older boards.
235 */
236 enable_board( board_num, io_port );
237
238 /* Now see if it looks like a PAS16 board */
239 board_rev = inb( io_port + PCB_CONFIG );
240
241 if( board_rev == 0xff )
242 return 0;
243
244 tmp = board_rev ^ 0xe0;
245
246 outb( tmp, io_port + PCB_CONFIG );
247 tmp = inb( io_port + PCB_CONFIG );
248 outb( board_rev, io_port + PCB_CONFIG );
249
250 if( board_rev != tmp ) /* Not a PAS-16 */
251 return 0;
252
253 if( ( inb( io_port + OPERATION_MODE_1 ) & 0x03 ) != 0x03 )
254 return 0; /* return if no SCSI interface found */
255
256 /* Mediavision has some new model boards that return ID bits
257 * that indicate a SCSI interface, but they're not (LMS). We'll
258 * put in an additional test to try to weed them out.
259 */
260
261 outb(0x01, io_port + WAIT_STATE); /* 1 Wait state */
262 outb(0x20, io_port + pas16_offset[MODE_REG]); /* Is it really SCSI? */
263 if (inb(io_port + pas16_offset[MODE_REG]) != 0x20) /* Write to a reg. */
264 return 0; /* and try to read */
265 outb(0x00, io_port + pas16_offset[MODE_REG]); /* it back. */
266 if (inb(io_port + pas16_offset[MODE_REG]) != 0x00)
267 return 0;
268
269 return 1;
270}
271
272
273#ifndef MODULE
274/*
275 * Function : pas16_setup(char *str, int *ints)
276 *
277 * Purpose : LILO command line initialization of the overrides array,
278 *
279 * Inputs : str - unused, ints - array of integer parameters with ints[0]
280 * equal to the number of ints.
281 *
282 */
283
284static int __init pas16_setup(char *str)
285{
286 static int commandline_current;
287 int i;
288 int ints[10];
289
290 get_options(str, ARRAY_SIZE(ints), ints);
291 if (ints[0] != 2)
292 printk("pas16_setup : usage pas16=io_port,irq\n");
293 else
294 if (commandline_current < NO_OVERRIDES) {
295 overrides[commandline_current].io_port = (unsigned short) ints[1];
296 overrides[commandline_current].irq = ints[2];
297 for (i = 0; i < NO_BASES; ++i)
298 if (bases[i].io_port == (unsigned short) ints[1]) {
299 bases[i].noauto = 1;
300 break;
301 }
302 ++commandline_current;
303 }
304 return 1;
305}
306
307__setup("pas16=", pas16_setup);
308#endif
309
310/*
311 * Function : int pas16_detect(struct scsi_host_template * tpnt)
312 *
313 * Purpose : detects and initializes PAS16 controllers
314 * that were autoprobed, overridden on the LILO command line,
315 * or specified at compile time.
316 *
317 * Inputs : tpnt - template for this SCSI adapter.
318 *
319 * Returns : 1 if a host adapter was found, 0 if not.
320 *
321 */
322
323static int __init pas16_detect(struct scsi_host_template *tpnt)
324{
325 static int current_override;
326 static unsigned short current_base;
327 struct Scsi_Host *instance;
328 unsigned short io_port;
329 int count;
330
331 if (pas16_addr != 0) {
332 overrides[0].io_port = pas16_addr;
333 /*
334 * This is how we avoid seeing more than
335 * one host adapter at the same I/O port.
336 * Cribbed shamelessly from pas16_setup().
337 */
338 for (count = 0; count < NO_BASES; ++count)
339 if (bases[count].io_port == pas16_addr) {
340 bases[count].noauto = 1;
341 break;
342 }
343 }
344 if (pas16_irq != 0)
345 overrides[0].irq = pas16_irq;
346
347 for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
348 io_port = 0;
349
350 if (overrides[current_override].io_port)
351 {
352 io_port = overrides[current_override].io_port;
353 enable_board( current_override, io_port );
354 init_board( io_port, overrides[current_override].irq, 1 );
355 }
356 else
357 for (; !io_port && (current_base < NO_BASES); ++current_base) {
358 dprintk(NDEBUG_INIT, "pas16: probing io_port 0x%04x\n",
359 (unsigned int)bases[current_base].io_port);
360 if ( !bases[current_base].noauto &&
361 pas16_hw_detect( current_base ) ){
362 io_port = bases[current_base].io_port;
363 init_board( io_port, default_irqs[ current_base ], 0 );
364 dprintk(NDEBUG_INIT, "pas16: detected board\n");
365 }
366 }
367
368 dprintk(NDEBUG_INIT, "pas16: io_port = 0x%04x\n",
369 (unsigned int)io_port);
370
371 if (!io_port)
372 break;
373
374 instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata));
375 if(instance == NULL)
376 goto out;
377
378 instance->io_port = io_port;
379
380 if (NCR5380_init(instance, 0))
381 goto out_unregister;
382
383 NCR5380_maybe_reset_bus(instance);
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 /* Compatibility with documented NCR5380 kernel parameters */
391 if (instance->irq == 255)
392 instance->irq = NO_IRQ;
393
394 if (instance->irq != NO_IRQ)
395 if (request_irq(instance->irq, pas16_intr, 0,
396 "pas16", instance)) {
397 printk("scsi%d : IRQ%d not free, interrupts disabled\n",
398 instance->host_no, instance->irq);
399 instance->irq = NO_IRQ;
400 }
401
402 if (instance->irq == NO_IRQ) {
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 dprintk(NDEBUG_INIT, "scsi%d : irq = %d\n",
411 instance->host_no, instance->irq);
412
413 ++current_override;
414 ++count;
415 }
416 return count;
417
418out_unregister:
419 scsi_unregister(instance);
420out:
421 return count;
422}
423
424/*
425 * Function : int pas16_biosparam(Disk *disk, struct block_device *dev, int *ip)
426 *
427 * Purpose : Generates a BIOS / DOS compatible H-C-S mapping for
428 * the specified device / size.
429 *
430 * Inputs : size = size of device in sectors (512 bytes), dev = block device
431 * major / minor, ip[] = {heads, sectors, cylinders}
432 *
433 * Returns : always 0 (success), initializes ip
434 *
435 */
436
437/*
438 * XXX Most SCSI boards use this mapping, I could be incorrect. Some one
439 * using hard disks on a trantor should verify that this mapping corresponds
440 * to that used by the BIOS / ASPI driver by running the linux fdisk program
441 * and matching the H_C_S coordinates to what DOS uses.
442 */
443
444static int pas16_biosparam(struct scsi_device *sdev, struct block_device *dev,
445 sector_t capacity, int *ip)
446{
447 int size = capacity;
448 ip[0] = 64;
449 ip[1] = 32;
450 ip[2] = size >> 11; /* I think I have it as /(32*64) */
451 if( ip[2] > 1024 ) { /* yes, >, not >= */
452 ip[0]=255;
453 ip[1]=63;
454 ip[2]=size/(63*255);
455 if( ip[2] > 1023 ) /* yes >1023... */
456 ip[2] = 1023;
457 }
458
459 return 0;
460}
461
462/*
463 * Function : int NCR5380_pread (struct Scsi_Host *instance,
464 * unsigned char *dst, int len)
465 *
466 * Purpose : Fast 5380 pseudo-dma read function, transfers len bytes to
467 * dst
468 *
469 * Inputs : dst = destination, len = length in bytes
470 *
471 * Returns : 0 on success, non zero on a failure such as a watchdog
472 * timeout.
473 */
474
475static inline int NCR5380_pread (struct Scsi_Host *instance, unsigned char *dst,
476 int len) {
477 register unsigned char *d = dst;
478 register unsigned short reg = (unsigned short) (instance->io_port +
479 P_DATA_REG_OFFSET);
480 register int i = len;
481 int ii = 0;
482 struct NCR5380_hostdata *hostdata = shost_priv(instance);
483
484 while ( !(inb(instance->io_port + P_STATUS_REG_OFFSET) & P_ST_RDY) )
485 ++ii;
486
487 insb( reg, d, i );
488
489 if ( inb(instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET) & P_TS_TIM) {
490 outb( P_TS_CT, instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET);
491 printk("scsi%d : watchdog timer fired in NCR5380_pread()\n",
492 instance->host_no);
493 return -1;
494 }
495 if (ii > hostdata->spin_max_r)
496 hostdata->spin_max_r = ii;
497 return 0;
498}
499
500/*
501 * Function : int NCR5380_pwrite (struct Scsi_Host *instance,
502 * unsigned char *src, int len)
503 *
504 * Purpose : Fast 5380 pseudo-dma write function, transfers len bytes from
505 * src
506 *
507 * Inputs : src = source, len = length in bytes
508 *
509 * Returns : 0 on success, non zero on a failure such as a watchdog
510 * timeout.
511 */
512
513static inline int NCR5380_pwrite (struct Scsi_Host *instance, unsigned char *src,
514 int len) {
515 register unsigned char *s = src;
516 register unsigned short reg = (instance->io_port + P_DATA_REG_OFFSET);
517 register int i = len;
518 int ii = 0;
519 struct NCR5380_hostdata *hostdata = shost_priv(instance);
520
521 while ( !((inb(instance->io_port + P_STATUS_REG_OFFSET)) & P_ST_RDY) )
522 ++ii;
523
524 outsb( reg, s, i );
525
526 if (inb(instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET) & P_TS_TIM) {
527 outb( P_TS_CT, instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET);
528 printk("scsi%d : watchdog timer fired in NCR5380_pwrite()\n",
529 instance->host_no);
530 return -1;
531 }
532 if (ii > hostdata->spin_max_w)
533 hostdata->spin_max_w = ii;
534 return 0;
535}
536
537#include "NCR5380.c"
538
539static int pas16_release(struct Scsi_Host *shost)
540{
541 if (shost->irq != NO_IRQ)
542 free_irq(shost->irq, shost);
543 NCR5380_exit(shost);
544 scsi_unregister(shost);
545 return 0;
546}
547
548static struct scsi_host_template driver_template = {
549 .name = "Pro Audio Spectrum-16 SCSI",
550 .detect = pas16_detect,
551 .release = pas16_release,
552 .proc_name = "pas16",
553 .show_info = pas16_show_info,
554 .write_info = pas16_write_info,
555 .info = pas16_info,
556 .queuecommand = pas16_queue_command,
557 .eh_abort_handler = pas16_abort,
558 .eh_bus_reset_handler = pas16_bus_reset,
559 .bios_param = pas16_biosparam,
560 .can_queue = 32,
561 .this_id = 7,
562 .sg_tablesize = SG_ALL,
563 .cmd_per_lun = 2,
564 .use_clustering = DISABLE_CLUSTERING,
565 .cmd_size = NCR5380_CMD_SIZE,
566 .max_sectors = 128,
567};
568#include "scsi_module.c"
569
570#ifdef MODULE
571module_param(pas16_addr, ushort, 0);
572module_param(pas16_irq, int, 0);
573#endif
574MODULE_LICENSE("GPL");