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1.1 root 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: * [email protected]
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 <linux/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: #include<linux/stat.h>
124:
125: struct proc_dir_entry proc_scsi_pas16 = {
126: PROC_SCSI_PAS16, 5, "pas16",
127: S_IFDIR | S_IRUGO | S_IXUGO, 2
128: };
129: static int pas_maxi = 0;
130: static int pas_wmaxi = 0;
131:
132:
133: int scsi_irq_translate[] =
134: { 0, 0, 1, 2, 3, 4, 5, 6, 0, 0, 7, 8, 9, 0, 10, 11 };
135:
136: /* The default_irqs array contains values used to set the irq into the
137: * board via software (as must be done on newer model boards without
138: * irq jumpers on the board). The first value in the array will be
139: * assigned to logical board 0, the next to board 1, etc.
140: */
141: int default_irqs[] = { PAS16_DEFAULT_BOARD_1_IRQ,
142: PAS16_DEFAULT_BOARD_2_IRQ,
143: PAS16_DEFAULT_BOARD_3_IRQ,
144: PAS16_DEFAULT_BOARD_4_IRQ
145: };
146:
147: static struct override {
148: unsigned short io_port;
149: int irq;
150: } overrides
151: #ifdef PAS16_OVERRIDE
152: [] = PAS16_OVERRIDE;
153: #else
154: [4] = {{0,IRQ_AUTO}, {0,IRQ_AUTO}, {0,IRQ_AUTO},
155: {0,IRQ_AUTO}};
156: #endif
157:
158: #define NO_OVERRIDES (sizeof(overrides) / sizeof(struct override))
159:
160: static struct base {
161: unsigned short io_port;
162: int noauto;
163: } bases[] = { {PAS16_DEFAULT_BASE_1, 0},
164: {PAS16_DEFAULT_BASE_2, 0},
165: {PAS16_DEFAULT_BASE_3, 0},
166: {PAS16_DEFAULT_BASE_4, 0}
167: };
168:
169: #define NO_BASES (sizeof (bases) / sizeof (struct base))
170:
171: unsigned short pas16_offset[ 8 ] =
172: {
173: 0x1c00, /* OUTPUT_DATA_REG */
174: 0x1c01, /* INITIATOR_COMMAND_REG */
175: 0x1c02, /* MODE_REG */
176: 0x1c03, /* TARGET_COMMAND_REG */
177: 0x3c00, /* STATUS_REG ro, SELECT_ENABLE_REG wo */
178: 0x3c01, /* BUS_AND_STATUS_REG ro, START_DMA_SEND_REG wo */
179: 0x3c02, /* INPUT_DATA_REGISTER ro, (N/A on PAS16 ?)
180: * START_DMA_TARGET_RECEIVE_REG wo
181: */
182: 0x3c03, /* RESET_PARITY_INTERRUPT_REG ro,
183: * START_DMA_INITIATOR_RECEIVE_REG wo
184: */
185: };
186: /*----------------------------------------------------------------*/
187: /* the following will set the monitor border color (useful to find
188: where something crashed or gets stuck at */
189: /* 1 = blue
190: 2 = green
191: 3 = cyan
192: 4 = red
193: 5 = magenta
194: 6 = yellow
195: 7 = white
196: */
197: #if 1
198: #define rtrc(i) {inb(0x3da); outb(0x31, 0x3c0); outb((i), 0x3c0);}
199: #else
200: #define rtrc(i) {}
201: #endif
202:
203:
204: /*
205: * Function : enable_board( int board_num, unsigned short port )
206: *
207: * Purpose : set address in new model board
208: *
209: * Inputs : board_num - logical board number 0-3, port - base address
210: *
211: */
212:
213: void enable_board( int board_num, unsigned short port )
214: {
215: outb( 0xbc + board_num, MASTER_ADDRESS_PTR );
216: outb( port >> 2, MASTER_ADDRESS_PTR );
217: }
218:
219:
220:
221: /*
222: * Function : init_board( unsigned short port, int irq )
223: *
224: * Purpose : Set the board up to handle the SCSI interface
225: *
226: * Inputs : port - base address of the board,
227: * irq - irq to assign to the SCSI port
228: * force_irq - set it even if it conflicts with sound driver
229: *
230: */
231:
232: void init_board( unsigned short io_port, int irq, int force_irq )
233: {
234: unsigned int tmp;
235: unsigned int pas_irq_code;
236:
237: /* Initialize the SCSI part of the board */
238:
239: outb( 0x30, io_port + P_TIMEOUT_COUNTER_REG ); /* Timeout counter */
240: outb( 0x01, io_port + P_TIMEOUT_STATUS_REG_OFFSET ); /* Reset TC */
241: outb( 0x01, io_port + WAIT_STATE ); /* 1 Wait state */
242:
243: NCR5380_read( RESET_PARITY_INTERRUPT_REG );
244:
245: /* Set the SCSI interrupt pointer without mucking up the sound
246: * interrupt pointer in the same byte.
247: */
248: pas_irq_code = ( irq < 16 ) ? scsi_irq_translate[irq] : 0;
249: tmp = inb( io_port + IO_CONFIG_3 );
250:
251: if( (( tmp & 0x0f ) == pas_irq_code) && pas_irq_code > 0
252: && !force_irq )
253: {
254: printk( "pas16: WARNING: Can't use same irq as sound "
255: "driver -- interrupts disabled\n" );
256: /* Set up the drive parameters, disable 5380 interrupts */
257: outb( 0x4d, io_port + SYS_CONFIG_4 );
258: }
259: else
260: {
261: tmp = ( tmp & 0x0f ) | ( pas_irq_code << 4 );
262: outb( tmp, io_port + IO_CONFIG_3 );
263:
264: /* Set up the drive parameters and enable 5380 interrupts */
265: outb( 0x6d, io_port + SYS_CONFIG_4 );
266: }
267: }
268:
269:
270: /*
271: * Function : pas16_hw_detect( unsigned short board_num )
272: *
273: * Purpose : determine if a pas16 board is present
274: *
275: * Inputs : board_num - logical board number ( 0 - 3 )
276: *
277: * Returns : 0 if board not found, 1 if found.
278: */
279:
280: int pas16_hw_detect( unsigned short board_num )
281: {
282: unsigned char board_rev, tmp;
283: unsigned short io_port = bases[ board_num ].io_port;
284:
285: /* See if we can find a PAS16 board at the address associated
286: * with this logical board number.
287: */
288:
289: /* First, attempt to take a newer model board out of reset and
290: * give it a base address. This shouldn't affect older boards.
291: */
292: enable_board( board_num, io_port );
293:
294: /* Now see if it looks like a PAS16 board */
295: board_rev = inb( io_port + PCB_CONFIG );
296:
297: if( board_rev == 0xff )
298: return 0;
299:
300: tmp = board_rev ^ 0xe0;
301:
302: outb( tmp, io_port + PCB_CONFIG );
303: tmp = inb( io_port + PCB_CONFIG );
304: outb( board_rev, io_port + PCB_CONFIG );
305:
306: if( board_rev != tmp ) /* Not a PAS-16 */
307: return 0;
308:
309: if( ( inb( io_port + OPERATION_MODE_1 ) & 0x03 ) != 0x03 )
310: return 0; /* return if no SCSI interface found */
311:
312: /* Mediavision has some new model boards that return ID bits
313: * that indicate a SCSI interface, but they're not (LMS). We'll
314: * put in an additional test to try to weed them out.
315: */
316:
317: outb( 0x01, io_port + WAIT_STATE ); /* 1 Wait state */
318: NCR5380_write( MODE_REG, 0x20 ); /* Is it really SCSI? */
319: if( NCR5380_read( MODE_REG ) != 0x20 ) /* Write to a reg. */
320: return 0; /* and try to read */
321: NCR5380_write( MODE_REG, 0x00 ); /* it back. */
322: if( NCR5380_read( MODE_REG ) != 0x00 )
323: return 0;
324:
325: return 1;
326: }
327:
328:
329: /*
330: * Function : pas16_setup(char *str, int *ints)
331: *
332: * Purpose : LILO command line initialization of the overrides array,
333: *
334: * Inputs : str - unused, ints - array of integer parameters with ints[0]
335: * equal to the number of ints.
336: *
337: */
338:
339: void pas16_setup(char *str, int *ints) {
340: static int commandline_current = 0;
341: int i;
342: if (ints[0] != 2)
343: printk("pas16_setup : usage pas16=io_port,irq\n");
344: else
345: if (commandline_current < NO_OVERRIDES) {
346: overrides[commandline_current].io_port = (unsigned short) ints[1];
347: overrides[commandline_current].irq = ints[2];
348: for (i = 0; i < NO_BASES; ++i)
349: if (bases[i].io_port == (unsigned short) ints[1]) {
350: bases[i].noauto = 1;
351: break;
352: }
353: ++commandline_current;
354: }
355: }
356:
357: /*
358: * Function : int pas16_detect(Scsi_Host_Template * tpnt)
359: *
360: * Purpose : detects and initializes PAS16 controllers
361: * that were autoprobed, overridden on the LILO command line,
362: * or specified at compile time.
363: *
364: * Inputs : tpnt - template for this SCSI adapter.
365: *
366: * Returns : 1 if a host adapter was found, 0 if not.
367: *
368: */
369:
370: int pas16_detect(Scsi_Host_Template * tpnt) {
371: static int current_override = 0;
372: static unsigned short current_base = 0;
373: struct Scsi_Host *instance;
374: unsigned short io_port;
375: int count;
376:
377: tpnt->proc_dir = &proc_scsi_pas16;
378: tpnt->proc_info = &pas16_proc_info;
379:
380: for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
381: io_port = 0;
382:
383: if (overrides[current_override].io_port)
384: {
385: io_port = overrides[current_override].io_port;
386: enable_board( current_override, io_port );
387: init_board( io_port, overrides[current_override].irq, 1 );
388: }
389: else
390: for (; !io_port && (current_base < NO_BASES); ++current_base) {
391: #if (PDEBUG & PDEBUG_INIT)
392: printk("scsi-pas16 : probing io_port %04x\n", (unsigned int) bases[current_base].io_port);
393: #endif
394: if ( !bases[current_base].noauto &&
395: pas16_hw_detect( current_base ) ){
396: io_port = bases[current_base].io_port;
397: init_board( io_port, default_irqs[ current_base ], 0 );
398: #if (PDEBUG & PDEBUG_INIT)
399: printk("scsi-pas16 : detected board.\n");
400: #endif
401: }
402: }
403:
404:
405: #if defined(PDEBUG) && (PDEBUG & PDEBUG_INIT)
406: printk("scsi-pas16 : io_port = %04x\n", (unsigned int) io_port);
407: #endif
408:
409: if (!io_port)
410: break;
411:
412: instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata));
413: instance->io_port = io_port;
414:
415: NCR5380_init(instance, 0);
416:
417: if (overrides[current_override].irq != IRQ_AUTO)
418: instance->irq = overrides[current_override].irq;
419: else
420: instance->irq = NCR5380_probe_irq(instance, PAS16_IRQS);
421:
422: if (instance->irq != IRQ_NONE)
423: if (request_irq(instance->irq, pas16_intr, SA_INTERRUPT, "pas16", NULL)) {
424: printk("scsi%d : IRQ%d not free, interrupts disabled\n",
425: instance->host_no, instance->irq);
426: instance->irq = IRQ_NONE;
427: }
428:
429: if (instance->irq == IRQ_NONE) {
430: printk("scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
431: printk("scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
432: /* Disable 5380 interrupts, leave drive params the same */
433: outb( 0x4d, io_port + SYS_CONFIG_4 );
434: outb( (inb(io_port + IO_CONFIG_3) & 0x0f), io_port + IO_CONFIG_3 );
435: }
436:
437: #if defined(PDEBUG) && (PDEBUG & PDEBUG_INIT)
438: printk("scsi%d : irq = %d\n", instance->host_no, instance->irq);
439: #endif
440:
441: printk("scsi%d : at 0x%04x", instance->host_no, (int)
442: instance->io_port);
443: if (instance->irq == IRQ_NONE)
444: printk (" interrupts disabled");
445: else
446: printk (" irq %d", instance->irq);
447: printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d",
448: CAN_QUEUE, CMD_PER_LUN, PAS16_PUBLIC_RELEASE);
449: NCR5380_print_options(instance);
450: printk("\n");
451:
452: ++current_override;
453: ++count;
454: }
455: return count;
456: }
457:
458: /*
459: * Function : int pas16_biosparam(Disk *disk, kdev_t dev, int *ip)
460: *
461: * Purpose : Generates a BIOS / DOS compatible H-C-S mapping for
462: * the specified device / size.
463: *
464: * Inputs : size = size of device in sectors (512 bytes), dev = block device
465: * major / minor, ip[] = {heads, sectors, cylinders}
466: *
467: * Returns : always 0 (success), initializes ip
468: *
469: */
470:
471: /*
472: * XXX Most SCSI boards use this mapping, I could be incorrect. Some one
473: * using hard disks on a trantor should verify that this mapping corresponds
474: * to that used by the BIOS / ASPI driver by running the linux fdisk program
475: * and matching the H_C_S coordinates to what DOS uses.
476: */
477:
478: int pas16_biosparam(Disk * disk, kdev_t dev, int * ip)
479: {
480: int size = disk->capacity;
481: ip[0] = 64;
482: ip[1] = 32;
483: ip[2] = size >> 11; /* I think I have it as /(32*64) */
484: if( ip[2] > 1024 ) { /* yes, >, not >= */
485: ip[0]=255;
486: ip[1]=63;
487: ip[2]=size/(63*255);
488: if( ip[2] > 1023 ) /* yes >1023... */
489: ip[2] = 1023;
490: }
491:
492: return 0;
493: }
494:
495: /*
496: * Function : int NCR5380_pread (struct Scsi_Host *instance,
497: * unsigned char *dst, int len)
498: *
499: * Purpose : Fast 5380 pseudo-dma read function, transfers len bytes to
500: * dst
501: *
502: * Inputs : dst = destination, len = length in bytes
503: *
504: * Returns : 0 on success, non zero on a failure such as a watchdog
505: * timeout.
506: */
507:
508: static inline int NCR5380_pread (struct Scsi_Host *instance, unsigned char *dst,
509: int len) {
510: register unsigned char *d = dst;
511: register unsigned short reg = (unsigned short) (instance->io_port +
512: P_DATA_REG_OFFSET);
513: register int i = len;
514: int ii = 0;
515:
516: while ( !(inb(instance->io_port + P_STATUS_REG_OFFSET) & P_ST_RDY) )
517: ++ii;
518:
519: insb( reg, d, i );
520:
521: if ( inb(instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET) & P_TS_TIM) {
522: outb( P_TS_CT, instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET);
523: printk("scsi%d : watchdog timer fired in NCR5380_pread()\n",
524: instance->host_no);
525: return -1;
526: }
527: if (ii > pas_maxi)
528: pas_maxi = ii;
529: return 0;
530: }
531:
532: /*
533: * Function : int NCR5380_pwrite (struct Scsi_Host *instance,
534: * unsigned char *src, int len)
535: *
536: * Purpose : Fast 5380 pseudo-dma write function, transfers len bytes from
537: * src
538: *
539: * Inputs : src = source, len = length in bytes
540: *
541: * Returns : 0 on success, non zero on a failure such as a watchdog
542: * timeout.
543: */
544:
545: static inline int NCR5380_pwrite (struct Scsi_Host *instance, unsigned char *src,
546: int len) {
547: register unsigned char *s = src;
548: register unsigned short reg = (instance->io_port + P_DATA_REG_OFFSET);
549: register int i = len;
550: int ii = 0;
551:
552: while ( !((inb(instance->io_port + P_STATUS_REG_OFFSET)) & P_ST_RDY) )
553: ++ii;
554:
555: outsb( reg, s, i );
556:
557: if (inb(instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET) & P_TS_TIM) {
558: outb( P_TS_CT, instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET);
559: printk("scsi%d : watchdog timer fired in NCR5380_pwrite()\n",
560: instance->host_no);
561: return -1;
562: }
563: if (ii > pas_maxi)
564: pas_wmaxi = ii;
565: return 0;
566: }
567:
568: #include "NCR5380.c"
569:
570: #ifdef MODULE
571: /* Eventually this will go into an include file, but this will be later */
572: Scsi_Host_Template driver_template = MV_PAS16;
573:
574: #include <linux/module.h>
575: #include "scsi_module.c"
576: #endif
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