1 #define AUTOSENSE
2 #define PSEUDO_DMA
3 #define BOARD_REQUIRES_NO_UDELAY /* PAS16 needs no I/O recovery delays */
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 * UNSAFE - leave interrupts enabled during pseudo-DMA transfers. This
56 * parameter comes from the NCR5380 code. It is NOT unsafe with
57 * the PAS16 and you should use it. If you don't you will have
58 * a problem with dropped characters during high speed
59 * communications during SCSI transfers. If you really don't
60 * want to use UNSAFE you can try defining LIMIT_TRANSFERSIZE or
61 * twiddle with the transfer size in the high level code.
62 *
63 * The card is detected and initialized in one of several ways :
64 * 1. Autoprobe (default) - There are many different models of
65 * the Pro Audio Spectrum/Studio 16, and I only have one of
66 * them, so this may require a little tweaking. An interrupt
67 * is triggered to autoprobe for the interrupt line. Note:
68 * with the newer model boards, the interrupt is set via
69 * software after reset using the default_irq for the
70 * current board number.
71 *
72 * 2. With command line overrides - pas16=port,irq may be
73 * used on the LILO command line to override the defaults.
74 *
75 * 3. With the PAS16_OVERRIDE compile time define. This is
76 * specified as an array of address, irq tuples. Ie, for
77 * one board at the default 0x388 address, IRQ10, I could say
78 * -DPAS16_OVERRIDE={{0x388, 10}}
79 * NOTE: Untested.
80 *
81 * 4. When included as a module, with arguments passed on the command line:
82 * pas16_irq=xx the interrupt
83 * pas16_addr=xx the port
84 * e.g. "modprobe pas16 pas16_addr=0x388 pas16_irq=5"
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 * SCSI_IRQ_NONE (255) should be specified for no interrupt,
103 * IRQ_AUTO (254) to autoprobe for an IRQ line if overridden
104 * on the command line.
105 *
106 * (IRQ_AUTO == 254, SCSI_IRQ_NONE == 255 in NCR5380.h)
107 */
108
109 #include <linux/module.h>
110
111 #include <asm/system.h>
112 #include <linux/signal.h>
113 #include <linux/proc_fs.h>
114 #include <linux/sched.h>
115 #include <asm/io.h>
116 #include <linux/blk.h>
117 #include "scsi.h"
118 #include "hosts.h"
119 #include "pas16.h"
120 #define AUTOPROBE_IRQ
121 #include "NCR5380.h"
122 #include "constants.h"
123 #include "sd.h"
124
125 #include <linux/stat.h>
126 #include <linux/init.h>
127
128 static int pas_maxi = 0;
129 static int pas_wmaxi = 0;
130 static unsigned short pas16_addr = 0;
131 static int pas16_irq = 0;
132
133 static int scsi_irq_translate[] = { 0, 0, 1, 2, 3, 4, 5, 6, 0, 0, 7, 8, 9, 0, 10, 11 };
134
135 /* The default_irqs array contains values used to set the irq into the
136 * board via software (as must be done on newer model boards without
137 * irq jumpers on the board). The first value in the array will be
138 * assigned to logical board 0, the next to board 1, etc.
139 */
140
141 static int default_irqs[] __initdata = {
142 PAS16_DEFAULT_BOARD_1_IRQ,
143 PAS16_DEFAULT_BOARD_2_IRQ,
144 PAS16_DEFAULT_BOARD_3_IRQ,
145 PAS16_DEFAULT_BOARD_4_IRQ
146 };
147
148 static struct override {
149 unsigned short io_port;
150 int irq;
151 } overrides
152 #ifdef PAS16_OVERRIDE
153 [] __initdata = PAS16_OVERRIDE;
154 #else
155 [4] __initdata = {
156 {0, IRQ_AUTO},
157 {0, IRQ_AUTO},
158 {0, IRQ_AUTO},
159 {0, IRQ_AUTO}
160 };
161 #endif
162
163 #define NO_OVERRIDES (sizeof(overrides) / sizeof(struct override))
164
165 static struct base {
166 unsigned short io_port;
167 int noauto;
168 } bases[] __initdata = {
169 {PAS16_DEFAULT_BASE_1, 0},
170 {PAS16_DEFAULT_BASE_2, 0},
171 {PAS16_DEFAULT_BASE_3, 0},
172 {PAS16_DEFAULT_BASE_4, 0}
173 };
174
175 #define NO_BASES (sizeof (bases) / sizeof (struct base))
176
177 unsigned short pas16_offset[8] = {
178 0x1c00, /* OUTPUT_DATA_REG */
179 0x1c01, /* INITIATOR_COMMAND_REG */
180 0x1c02, /* MODE_REG */
181 0x1c03, /* TARGET_COMMAND_REG */
182 0x3c00, /* STATUS_REG ro, SELECT_ENABLE_REG wo */
183 0x3c01, /* BUS_AND_STATUS_REG ro, START_DMA_SEND_REG wo */
184 0x3c02, /* INPUT_DATA_REGISTER ro, (N/A on PAS16 ?)
185 * START_DMA_TARGET_RECEIVE_REG wo
186 */
187 0x3c03, /* RESET_PARITY_INTERRUPT_REG ro,
188 * START_DMA_INITIATOR_RECEIVE_REG wo
189 */
190 };
191 /*----------------------------------------------------------------*/
192
193 /**
194 * enable_board - enable a pas16 board
195 * @board_num: logical board id
196 * @port: port to assign it
197 *
198 * Sets the address on new model PAS16 hardware
199 */
200
enable_board(int board_num,unsigned short port)201 static void __init enable_board(int board_num, unsigned short port)
202 {
203 outb(0xbc + board_num, MASTER_ADDRESS_PTR);
204 outb(port >> 2, MASTER_ADDRESS_PTR);
205 }
206
207 /**
208 * init_board - set up board
209 * @port: board address
210 * @irq: interrupt line
211 * @force_irq: if true allow scsi/audio on the same int
212 *
213 * Set the board up to handle the SCSI interface
214 */
215
init_board(unsigned short io_port,int irq,int force_irq)216 static void __init init_board(unsigned short io_port, int irq, int force_irq)
217 {
218 unsigned int tmp;
219 unsigned int pas_irq_code;
220
221 /* Initialize the SCSI part of the board */
222
223 outb(0x30, io_port + P_TIMEOUT_COUNTER_REG); /* Timeout counter */
224 outb(0x01, io_port + P_TIMEOUT_STATUS_REG_OFFSET); /* Reset TC */
225 outb(0x01, io_port + WAIT_STATE); /* 1 Wait state */
226
227 NCR5380_read(RESET_PARITY_INTERRUPT_REG);
228
229 /*
230 * Set the SCSI interrupt pointer without mucking up the sound
231 * interrupt pointer in the same byte.
232 */
233
234 pas_irq_code = (irq < 16) ? scsi_irq_translate[irq] : 0;
235 tmp = inb(io_port + IO_CONFIG_3);
236
237 if (((tmp & 0x0f) == pas_irq_code) && pas_irq_code > 0 && !force_irq) {
238 printk(KERN_WARNING "pas16: WARNING: Can't use same irq as sound " "driver -- interrupts disabled\n");
239 /* Set up the drive parameters, disable 5380 interrupts */
240 outb(0x4d, io_port + SYS_CONFIG_4);
241 } else {
242 tmp = (tmp & 0x0f) | (pas_irq_code << 4);
243 outb(tmp, io_port + IO_CONFIG_3);
244
245 /* Set up the drive parameters and enable 5380 interrupts */
246 outb(0x6d, io_port + SYS_CONFIG_4);
247 }
248 }
249
250
251 /**
252 * pas16_hw_detect - probe for hardware
253 * @board_num: logical board ID to probe for
254 *
255 * Determine if a pas16 board is present
256 */
257
pas16_hw_detect(unsigned short board_num)258 static int __init pas16_hw_detect(unsigned short board_num)
259 {
260 unsigned char board_rev, tmp;
261 unsigned short io_port = bases[board_num].io_port;
262
263 /* See if we can find a PAS16 board at the address associated
264 * with this logical board number.
265 */
266
267 /* First, attempt to take a newer model board out of reset and
268 * give it a base address. This shouldn't affect older boards.
269 */
270 enable_board(board_num, io_port);
271
272 /* Now see if it looks like a PAS16 board */
273 board_rev = inb(io_port + PCB_CONFIG);
274
275 if (board_rev == 0xff)
276 return 0;
277
278 tmp = board_rev ^ 0xe0;
279
280 outb(tmp, io_port + PCB_CONFIG);
281 tmp = inb(io_port + PCB_CONFIG);
282 outb(board_rev, io_port + PCB_CONFIG);
283
284 if (board_rev != tmp) /* Not a PAS-16 */
285 return 0;
286
287 if ((inb(io_port + OPERATION_MODE_1) & 0x03) != 0x03)
288 return 0; /* return if no SCSI interface found */
289
290 /* Mediavision has some new model boards that return ID bits
291 * that indicate a SCSI interface, but they're not (LMS). We'll
292 * put in an additional test to try to weed them out.
293 */
294
295 outb(0x01, io_port + WAIT_STATE); /* 1 Wait state */
296 NCR5380_write(MODE_REG, 0x20); /* Is it really SCSI? */
297 if (NCR5380_read(MODE_REG) != 0x20) /* Write to a reg. */
298 return 0; /* and try to read */
299 NCR5380_write(MODE_REG, 0x00); /* it back. */
300 if (NCR5380_read(MODE_REG) != 0x00)
301 return 0;
302
303 return 1;
304 }
305
306 /**
307 * pas16_setup - parse command line
308 * @str: command line block
309 *
310 * LILO command line initialization of the overrides array from
311 * the passed in pas16= options
312 */
313
pas16_setup(char * str)314 int __init pas16_setup(char *str)
315 {
316 static int commandline_current = 0;
317 int i;
318 int ints[10];
319
320 get_options(str, sizeof(ints) / sizeof(int), ints);
321 if (ints[0] != 2)
322 printk(KERN_ERR "pas16_setup : usage pas16=io_port,irq\n");
323 else if (commandline_current < NO_OVERRIDES) {
324 overrides[commandline_current].io_port = (unsigned short) ints[1];
325 overrides[commandline_current].irq = ints[2];
326 for (i = 0; i < NO_BASES; ++i)
327 if (bases[i].io_port == (unsigned short) ints[1]) {
328 bases[i].noauto = 1;
329 break;
330 }
331 ++commandline_current;
332 }
333 return 1;
334 }
335
336 __setup("pas16=", pas16_setup);
337
338 /**
339 * pas16_detect - detect and configure a pas16
340 * @tpnt: template
341 *
342 * Detects and initializes PAS16 controllers that were autoprobed,
343 * overridden on the LILO command line, or specified at compile time.
344 */
345
pas16_detect(Scsi_Host_Template * tpnt)346 int __init pas16_detect(Scsi_Host_Template * tpnt)
347 {
348 static int current_override = 0;
349 static unsigned short current_base = 0;
350 struct Scsi_Host *instance;
351 unsigned short io_port;
352 int count;
353
354 tpnt->proc_name = "pas16";
355 tpnt->proc_info = &pas16_proc_info;
356
357 if (pas16_addr != 0) {
358 overrides[0].io_port = pas16_addr;
359 /*
360 * This is how we avoid seeing more than
361 * one host adapter at the same I/O port.
362 * Cribbed shamelessly from pas16_setup().
363 */
364 for (count = 0; count < NO_BASES; ++count)
365 if (bases[count].io_port == pas16_addr) {
366 bases[count].noauto = 1;
367 break;
368 }
369 }
370 if (pas16_irq != 0)
371 overrides[0].irq = pas16_irq;
372
373 for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
374 io_port = 0;
375
376 if (overrides[current_override].io_port) {
377 io_port = overrides[current_override].io_port;
378 enable_board(current_override, io_port);
379 init_board(io_port, overrides[current_override].irq, 1);
380 }
381 else
382 {
383 for (; !io_port && (current_base < NO_BASES); ++current_base) {
384 if (!bases[current_base].noauto && pas16_hw_detect(current_base)) {
385 io_port = bases[current_base].io_port;
386 init_board(io_port, default_irqs[current_base], 0);
387 }
388 }
389 }
390
391 if (!io_port)
392 break;
393
394 instance = scsi_register(tpnt, sizeof(struct NCR5380_hostdata));
395 if (instance == NULL)
396 break;
397
398 instance->io_port = io_port;
399
400 NCR5380_init(instance, 0);
401
402 if (overrides[current_override].irq != IRQ_AUTO)
403 instance->irq = overrides[current_override].irq;
404 else
405 instance->irq = NCR5380_probe_irq(instance, PAS16_IRQS);
406
407 if (instance->irq != SCSI_IRQ_NONE)
408 if (request_irq(instance->irq, do_pas16_intr, SA_INTERRUPT, "pas16", NULL)) {
409 printk(KERN_WARNING "scsi%d : IRQ%d not free, interrupts disabled\n", instance->host_no, instance->irq);
410 instance->irq = SCSI_IRQ_NONE;
411 }
412
413 if (instance->irq == SCSI_IRQ_NONE) {
414 printk(KERN_INFO "scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
415 printk(KERN_INFO "scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
416 /* Disable 5380 interrupts, leave drive params the same */
417 outb(0x4d, io_port + SYS_CONFIG_4);
418 outb((inb(io_port + IO_CONFIG_3) & 0x0f), io_port + IO_CONFIG_3);
419 }
420
421 printk(KERN_INFO "scsi%d : at 0x%04x", instance->host_no, (int)
422 instance->io_port);
423 if (instance->irq == SCSI_IRQ_NONE)
424 printk(" interrupts disabled");
425 else
426 printk(" irq %d", instance->irq);
427 printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d", CAN_QUEUE, CMD_PER_LUN, PAS16_PUBLIC_RELEASE);
428 NCR5380_print_options(instance);
429 printk("\n");
430
431 ++current_override;
432 ++count;
433 }
434 return count;
435 }
436
437 /**
438 * pas16_biosparam - generate C/H/S data
439 * @disk: Disk to set up
440 * @dev: device ident of disk
441 * @ip: array to return C/H/S mapping
442 *
443 * Generates a BIOS / DOS compatible H-C-S mapping for
444 * the specified device / size.
445 */
446
pas16_biosparam(Disk * disk,kdev_t dev,int * ip)447 int pas16_biosparam(Disk * disk, kdev_t dev, int *ip)
448 {
449 int size = disk->capacity;
450 ip[0] = 64;
451 ip[1] = 32;
452 ip[2] = size >> 11; /* I think I have it as /(32*64) */
453 if (ip[2] > 1024) { /* yes, >, not >= */
454 ip[0] = 255;
455 ip[1] = 63;
456 ip[2] = size / (63 * 255);
457 if (ip[2] > 1023) /* yes >1023... */
458 ip[2] = 1023;
459 }
460
461 return 0;
462 }
463
464 /**
465 * NCR5380_pread - pseudo DMA read
466 * @instance: board to read from
467 * @dst: destination for data
468 * @len: expected/max block length
469 *
470 * Fast 5380 pseudo-dma read function, transfers len bytes to
471 * dst. Unlike most boards the PAS has IRQs enabled here, which
472 * helps no end.
473 */
474
NCR5380_pread(struct Scsi_Host * instance,unsigned char * dst,int len)475 static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst, int len)
476 {
477 unsigned char *d = dst;
478 unsigned short reg = (unsigned short) (instance->io_port + P_DATA_REG_OFFSET);
479 int i = len;
480 int ii = 0;
481
482 while (!(inb(instance->io_port + P_STATUS_REG_OFFSET) & P_ST_RDY))
483 ++ii;
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(KERN_ERR "scsi%d : watchdog timer fired in NCR5380_pread()\n", instance->host_no);
490 return -1;
491 }
492 if (ii > pas_maxi)
493 pas_maxi = ii;
494 return 0;
495 }
496
497 /**
498 * NCR5380_pwrite - pseudo DMA write
499 * @instance: board to write to
500 * @src: source for data
501 * @len: expected/max block length
502 *
503 * Fast 5380 pseudo-dma write function, transfers len bytes from
504 * src. Unlike most boards the PAS has IRQs enabled here, which
505 * helps no end.
506 */
507
NCR5380_pwrite(struct Scsi_Host * instance,unsigned char * src,int len)508 static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src, int len)
509 {
510 unsigned char *s = src;
511 unsigned short reg = (instance->io_port + P_DATA_REG_OFFSET);
512 int i = len;
513 int ii = 0;
514
515 while (!((inb(instance->io_port + P_STATUS_REG_OFFSET)) & P_ST_RDY))
516 ++ii;
517
518 outsb(reg, s, i);
519
520 if (inb(instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET) & P_TS_TIM) {
521 outb(P_TS_CT, instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET);
522 printk(KERN_ERR "scsi%d : watchdog timer fired in NCR5380_pwrite()\n", instance->host_no);
523 return -1;
524 }
525 if (ii > pas_maxi)
526 pas_wmaxi = ii;
527 return 0;
528 }
529
530 #include "NCR5380.c"
531
532 /* Eventually this will go into an include file, but this will be later */
533 static Scsi_Host_Template driver_template = MV_PAS16;
534
535 #include "scsi_module.c"
536
537 #ifdef MODULE
538 MODULE_PARM(pas16_addr, "h");
539 MODULE_PARM(pas16_irq, "i");
540 #endif
541 MODULE_LICENSE("GPL");
542