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