4 #define UNSAFE /* Not unsafe for PAS16 -- use it */
7 * This driver adapted from Drew Eckhardt's Trantor T128 driver
9 * Copyright 1993, Drew Eckhardt
11 * (Unix and Linux consulting and custom programming)
15 * ( Based on T128 - DISTRIBUTION RELEASE 3. )
17 * Modified to work with the Pro Audio Spectrum/Studio 16
21 * For more information, please consult
30 * SCSI Protocol Controller
33 * NCR Microelectronics
34 * 1635 Aeroplaza Drive
35 * Colorado Springs, CO 80916
42 * AUTOSENSE - if defined, REQUEST SENSE will be performed automatically
43 * for commands that return with a CHECK CONDITION status.
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.
50 * PSEUDO_DMA - enables PSEUDO-DMA hardware, should give a 3-4X performance
51 * increase compared to polled I/O.
53 * PARITY - enable parity checking. Not supported.
55 * SCSI2 - enable support for SCSI-II tagged queueing. Untested.
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.
65 * USLEEP - enable support for devices that don't disconnect. Untested.
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.
76 * 2. With command line overrides - pas16=port,irq may be
77 * used on the LILO command line to override the defaults.
79 * 3. With the PAS16_OVERRIDE compile time define. This is
80 * specified as an array of address, irq tuples. Ie, for
81 * one board at the default 0x388 address, IRQ10, I could say
82 * -DPAS16_OVERRIDE={{0x388, 10}}
85 * 4. When included as a module, with arguments passed on the command line:
86 * pas16_irq=xx the interrupt
87 * pas16_addr=xx the port
88 * e.g. "modprobe pas16 pas16_addr=0x388 pas16_irq=5"
90 * Note that if the override methods are used, place holders must
91 * be specified for other boards in the system.
94 * Configuration notes :
95 * The current driver does not support interrupt sharing with the
96 * sound portion of the card. If you use the same irq for the
97 * scsi port and sound you will have problems. Either use
98 * a different irq for the scsi port or don't use interrupts
101 * If you have problems with your card not being recognized, use
102 * the LILO command line override. Try to get it recognized without
103 * interrupts. Ie, for a board at the default 0x388 base port,
104 * boot: linux pas16=0x388,255
106 * IRQ_NONE (255) should be specified for no interrupt,
107 * IRQ_AUTO (254) to autoprobe for an IRQ line if overridden
108 * on the command line.
110 * (IRQ_AUTO == 254, IRQ_NONE == 255 in NCR5380.h)
114 #include <linux/module.h>
117 #include <asm/system.h>
118 #include <linux/signal.h>
119 #include <linux/proc_fs.h>
120 #include <linux/sched.h>
122 #include <linux/blk.h>
126 #define AUTOPROBE_IRQ
128 #include "constants.h"
131 #include <linux/stat.h>
132 #include <linux/init.h>
134 static int pas_maxi
= 0;
135 static int pas_wmaxi
= 0;
136 static unsigned short pas16_addr
= 0;
137 static int pas16_irq
= 0;
140 int scsi_irq_translate
[] =
141 { 0, 0, 1, 2, 3, 4, 5, 6, 0, 0, 7, 8, 9, 0, 10, 11 };
143 /* The default_irqs array contains values used to set the irq into the
144 * board via software (as must be done on newer model boards without
145 * irq jumpers on the board). The first value in the array will be
146 * assigned to logical board 0, the next to board 1, etc.
148 int default_irqs
[] __initdata
=
149 { PAS16_DEFAULT_BOARD_1_IRQ
,
150 PAS16_DEFAULT_BOARD_2_IRQ
,
151 PAS16_DEFAULT_BOARD_3_IRQ
,
152 PAS16_DEFAULT_BOARD_4_IRQ
155 static struct override
{
156 unsigned short io_port
;
159 #ifdef PAS16_OVERRIDE
160 [] __initdata
= PAS16_OVERRIDE
;
162 [4] __initdata
= {{0,IRQ_AUTO
}, {0,IRQ_AUTO
}, {0,IRQ_AUTO
},
166 #define NO_OVERRIDES (sizeof(overrides) / sizeof(struct override))
169 unsigned short io_port
;
171 } bases
[] __initdata
=
172 { {PAS16_DEFAULT_BASE_1
, 0},
173 {PAS16_DEFAULT_BASE_2
, 0},
174 {PAS16_DEFAULT_BASE_3
, 0},
175 {PAS16_DEFAULT_BASE_4
, 0}
178 #define NO_BASES (sizeof (bases) / sizeof (struct base))
180 unsigned short pas16_offset
[ 8 ] =
182 0x1c00, /* OUTPUT_DATA_REG */
183 0x1c01, /* INITIATOR_COMMAND_REG */
184 0x1c02, /* MODE_REG */
185 0x1c03, /* TARGET_COMMAND_REG */
186 0x3c00, /* STATUS_REG ro, SELECT_ENABLE_REG wo */
187 0x3c01, /* BUS_AND_STATUS_REG ro, START_DMA_SEND_REG wo */
188 0x3c02, /* INPUT_DATA_REGISTER ro, (N/A on PAS16 ?)
189 * START_DMA_TARGET_RECEIVE_REG wo
191 0x3c03, /* RESET_PARITY_INTERRUPT_REG ro,
192 * START_DMA_INITIATOR_RECEIVE_REG wo
195 /*----------------------------------------------------------------*/
196 /* the following will set the monitor border color (useful to find
197 where something crashed or gets stuck at */
207 #define rtrc(i) {inb(0x3da); outb(0x31, 0x3c0); outb((i), 0x3c0);}
214 * Function : enable_board( int board_num, unsigned short port )
216 * Purpose : set address in new model board
218 * Inputs : board_num - logical board number 0-3, port - base address
223 enable_board( int board_num
, unsigned short port
)
225 outb( 0xbc + board_num
, MASTER_ADDRESS_PTR
);
226 outb( port
>> 2, MASTER_ADDRESS_PTR
);
232 * Function : init_board( unsigned short port, int irq )
234 * Purpose : Set the board up to handle the SCSI interface
236 * Inputs : port - base address of the board,
237 * irq - irq to assign to the SCSI port
238 * force_irq - set it even if it conflicts with sound driver
243 init_board( unsigned short io_port
, int irq
, int force_irq
)
246 unsigned int pas_irq_code
;
248 /* Initialize the SCSI part of the board */
250 outb( 0x30, io_port
+ P_TIMEOUT_COUNTER_REG
); /* Timeout counter */
251 outb( 0x01, io_port
+ P_TIMEOUT_STATUS_REG_OFFSET
); /* Reset TC */
252 outb( 0x01, io_port
+ WAIT_STATE
); /* 1 Wait state */
254 NCR5380_read( RESET_PARITY_INTERRUPT_REG
);
256 /* Set the SCSI interrupt pointer without mucking up the sound
257 * interrupt pointer in the same byte.
259 pas_irq_code
= ( irq
< 16 ) ? scsi_irq_translate
[irq
] : 0;
260 tmp
= inb( io_port
+ IO_CONFIG_3
);
262 if( (( tmp
& 0x0f ) == pas_irq_code
) && pas_irq_code
> 0
265 printk( "pas16: WARNING: Can't use same irq as sound "
266 "driver -- interrupts disabled\n" );
267 /* Set up the drive parameters, disable 5380 interrupts */
268 outb( 0x4d, io_port
+ SYS_CONFIG_4
);
272 tmp
= ( tmp
& 0x0f ) | ( pas_irq_code
<< 4 );
273 outb( tmp
, io_port
+ IO_CONFIG_3
);
275 /* Set up the drive parameters and enable 5380 interrupts */
276 outb( 0x6d, io_port
+ SYS_CONFIG_4
);
282 * Function : pas16_hw_detect( unsigned short board_num )
284 * Purpose : determine if a pas16 board is present
286 * Inputs : board_num - logical board number ( 0 - 3 )
288 * Returns : 0 if board not found, 1 if found.
292 pas16_hw_detect( unsigned short board_num
)
294 unsigned char board_rev
, tmp
;
295 unsigned short io_port
= bases
[ board_num
].io_port
;
297 /* See if we can find a PAS16 board at the address associated
298 * with this logical board number.
301 /* First, attempt to take a newer model board out of reset and
302 * give it a base address. This shouldn't affect older boards.
304 enable_board( board_num
, io_port
);
306 /* Now see if it looks like a PAS16 board */
307 board_rev
= inb( io_port
+ PCB_CONFIG
);
309 if( board_rev
== 0xff )
312 tmp
= board_rev
^ 0xe0;
314 outb( tmp
, io_port
+ PCB_CONFIG
);
315 tmp
= inb( io_port
+ PCB_CONFIG
);
316 outb( board_rev
, io_port
+ PCB_CONFIG
);
318 if( board_rev
!= tmp
) /* Not a PAS-16 */
321 if( ( inb( io_port
+ OPERATION_MODE_1
) & 0x03 ) != 0x03 )
322 return 0; /* return if no SCSI interface found */
324 /* Mediavision has some new model boards that return ID bits
325 * that indicate a SCSI interface, but they're not (LMS). We'll
326 * put in an additional test to try to weed them out.
329 outb( 0x01, io_port
+ WAIT_STATE
); /* 1 Wait state */
330 NCR5380_write( MODE_REG
, 0x20 ); /* Is it really SCSI? */
331 if( NCR5380_read( MODE_REG
) != 0x20 ) /* Write to a reg. */
332 return 0; /* and try to read */
333 NCR5380_write( MODE_REG
, 0x00 ); /* it back. */
334 if( NCR5380_read( MODE_REG
) != 0x00 )
342 * Function : pas16_setup(char *str, int *ints)
344 * Purpose : LILO command line initialization of the overrides array,
346 * Inputs : str - unused, ints - array of integer parameters with ints[0]
347 * equal to the number of ints.
351 void __init
pas16_setup(char *str
, int *ints
)
353 static int commandline_current
= 0;
356 printk("pas16_setup : usage pas16=io_port,irq\n");
358 if (commandline_current
< NO_OVERRIDES
) {
359 overrides
[commandline_current
].io_port
= (unsigned short) ints
[1];
360 overrides
[commandline_current
].irq
= ints
[2];
361 for (i
= 0; i
< NO_BASES
; ++i
)
362 if (bases
[i
].io_port
== (unsigned short) ints
[1]) {
366 ++commandline_current
;
371 * Function : int pas16_detect(Scsi_Host_Template * tpnt)
373 * Purpose : detects and initializes PAS16 controllers
374 * that were autoprobed, overridden on the LILO command line,
375 * or specified at compile time.
377 * Inputs : tpnt - template for this SCSI adapter.
379 * Returns : 1 if a host adapter was found, 0 if not.
383 int __init
pas16_detect(Scsi_Host_Template
* tpnt
)
385 static int current_override
= 0;
386 static unsigned short current_base
= 0;
387 struct Scsi_Host
*instance
;
388 unsigned short io_port
;
391 tpnt
->proc_name
= "pas16";
392 tpnt
->proc_info
= &pas16_proc_info
;
394 if (pas16_addr
!= 0) {
395 overrides
[0].io_port
= pas16_addr
;
397 * This is how we avoid seeing more than
398 * one host adapter at the same I/O port.
399 * Cribbed shamelessly from pas16_setup().
401 for (count
= 0; count
< NO_BASES
; ++count
)
402 if (bases
[count
].io_port
== pas16_addr
) {
403 bases
[count
].noauto
= 1;
408 overrides
[0].irq
= pas16_irq
;
410 for (count
= 0; current_override
< NO_OVERRIDES
; ++current_override
) {
413 if (overrides
[current_override
].io_port
)
415 io_port
= overrides
[current_override
].io_port
;
416 enable_board( current_override
, io_port
);
417 init_board( io_port
, overrides
[current_override
].irq
, 1 );
420 for (; !io_port
&& (current_base
< NO_BASES
); ++current_base
) {
421 #if (PDEBUG & PDEBUG_INIT)
422 printk("scsi-pas16 : probing io_port %04x\n", (unsigned int) bases
[current_base
].io_port
);
424 if ( !bases
[current_base
].noauto
&&
425 pas16_hw_detect( current_base
) ){
426 io_port
= bases
[current_base
].io_port
;
427 init_board( io_port
, default_irqs
[ current_base
], 0 );
428 #if (PDEBUG & PDEBUG_INIT)
429 printk("scsi-pas16 : detected board.\n");
435 #if defined(PDEBUG) && (PDEBUG & PDEBUG_INIT)
436 printk("scsi-pas16 : io_port = %04x\n", (unsigned int) io_port
);
442 instance
= scsi_register (tpnt
, sizeof(struct NCR5380_hostdata
));
443 instance
->io_port
= io_port
;
445 NCR5380_init(instance
, 0);
447 if (overrides
[current_override
].irq
!= IRQ_AUTO
)
448 instance
->irq
= overrides
[current_override
].irq
;
450 instance
->irq
= NCR5380_probe_irq(instance
, PAS16_IRQS
);
452 if (instance
->irq
!= IRQ_NONE
)
453 if (request_irq(instance
->irq
, do_pas16_intr
, SA_INTERRUPT
, "pas16", NULL
)) {
454 printk("scsi%d : IRQ%d not free, interrupts disabled\n",
455 instance
->host_no
, instance
->irq
);
456 instance
->irq
= IRQ_NONE
;
459 if (instance
->irq
== IRQ_NONE
) {
460 printk("scsi%d : interrupts not enabled. for better interactive performance,\n", instance
->host_no
);
461 printk("scsi%d : please jumper the board for a free IRQ.\n", instance
->host_no
);
462 /* Disable 5380 interrupts, leave drive params the same */
463 outb( 0x4d, io_port
+ SYS_CONFIG_4
);
464 outb( (inb(io_port
+ IO_CONFIG_3
) & 0x0f), io_port
+ IO_CONFIG_3
);
467 #if defined(PDEBUG) && (PDEBUG & PDEBUG_INIT)
468 printk("scsi%d : irq = %d\n", instance
->host_no
, instance
->irq
);
471 printk("scsi%d : at 0x%04x", instance
->host_no
, (int)
473 if (instance
->irq
== IRQ_NONE
)
474 printk (" interrupts disabled");
476 printk (" irq %d", instance
->irq
);
477 printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d",
478 CAN_QUEUE
, CMD_PER_LUN
, PAS16_PUBLIC_RELEASE
);
479 NCR5380_print_options(instance
);
489 * Function : int pas16_biosparam(Disk *disk, kdev_t dev, int *ip)
491 * Purpose : Generates a BIOS / DOS compatible H-C-S mapping for
492 * the specified device / size.
494 * Inputs : size = size of device in sectors (512 bytes), dev = block device
495 * major / minor, ip[] = {heads, sectors, cylinders}
497 * Returns : always 0 (success), initializes ip
502 * XXX Most SCSI boards use this mapping, I could be incorrect. Some one
503 * using hard disks on a trantor should verify that this mapping corresponds
504 * to that used by the BIOS / ASPI driver by running the linux fdisk program
505 * and matching the H_C_S coordinates to what DOS uses.
508 int pas16_biosparam(Disk
* disk
, kdev_t dev
, int * ip
)
510 int size
= disk
->capacity
;
513 ip
[2] = size
>> 11; /* I think I have it as /(32*64) */
514 if( ip
[2] > 1024 ) { /* yes, >, not >= */
518 if( ip
[2] > 1023 ) /* yes >1023... */
526 * Function : int NCR5380_pread (struct Scsi_Host *instance,
527 * unsigned char *dst, int len)
529 * Purpose : Fast 5380 pseudo-dma read function, transfers len bytes to
532 * Inputs : dst = destination, len = length in bytes
534 * Returns : 0 on success, non zero on a failure such as a watchdog
538 static inline int NCR5380_pread (struct Scsi_Host
*instance
, unsigned char *dst
,
540 register unsigned char *d
= dst
;
541 register unsigned short reg
= (unsigned short) (instance
->io_port
+
543 register int i
= len
;
546 while ( !(inb(instance
->io_port
+ P_STATUS_REG_OFFSET
) & P_ST_RDY
) )
551 if ( inb(instance
->io_port
+ P_TIMEOUT_STATUS_REG_OFFSET
) & P_TS_TIM
) {
552 outb( P_TS_CT
, instance
->io_port
+ P_TIMEOUT_STATUS_REG_OFFSET
);
553 printk("scsi%d : watchdog timer fired in NCR5380_pread()\n",
563 * Function : int NCR5380_pwrite (struct Scsi_Host *instance,
564 * unsigned char *src, int len)
566 * Purpose : Fast 5380 pseudo-dma write function, transfers len bytes from
569 * Inputs : src = source, len = length in bytes
571 * Returns : 0 on success, non zero on a failure such as a watchdog
575 static inline int NCR5380_pwrite (struct Scsi_Host
*instance
, unsigned char *src
,
577 register unsigned char *s
= src
;
578 register unsigned short reg
= (instance
->io_port
+ P_DATA_REG_OFFSET
);
579 register int i
= len
;
582 while ( !((inb(instance
->io_port
+ P_STATUS_REG_OFFSET
)) & P_ST_RDY
) )
587 if (inb(instance
->io_port
+ P_TIMEOUT_STATUS_REG_OFFSET
) & P_TS_TIM
) {
588 outb( P_TS_CT
, instance
->io_port
+ P_TIMEOUT_STATUS_REG_OFFSET
);
589 printk("scsi%d : watchdog timer fired in NCR5380_pwrite()\n",
601 /* Eventually this will go into an include file, but this will be later */
602 Scsi_Host_Template driver_template
= MV_PAS16
;
604 #include "scsi_module.c"
606 MODULE_PARM(pas16_addr
, "h");
607 MODULE_PARM(pas16_irq
, "i");