2 #define UNSAFE /* Not unsafe for PAS16 -- use it */
6 * This driver adapted from Drew Eckhardt's Trantor T128 driver
8 * Copyright 1993, Drew Eckhardt
10 * (Unix and Linux consulting and custom programming)
14 * ( Based on T128 - DISTRIBUTION RELEASE 3. )
16 * Modified to work with the Pro Audio Spectrum/Studio 16
20 * For more information, please consult
28 * The card is detected and initialized in one of several ways :
29 * 1. Autoprobe (default) - There are many different models of
30 * the Pro Audio Spectrum/Studio 16, and I only have one of
31 * them, so this may require a little tweaking. An interrupt
32 * is triggered to autoprobe for the interrupt line. Note:
33 * with the newer model boards, the interrupt is set via
34 * software after reset using the default_irq for the
35 * current board number.
37 * 2. With command line overrides - pas16=port,irq may be
38 * used on the LILO command line to override the defaults.
40 * 3. With the PAS16_OVERRIDE compile time define. This is
41 * specified as an array of address, irq tuples. Ie, for
42 * one board at the default 0x388 address, IRQ10, I could say
43 * -DPAS16_OVERRIDE={{0x388, 10}}
46 * 4. When included as a module, with arguments passed on the command line:
47 * pas16_irq=xx the interrupt
48 * pas16_addr=xx the port
49 * e.g. "modprobe pas16 pas16_addr=0x388 pas16_irq=5"
51 * Note that if the override methods are used, place holders must
52 * be specified for other boards in the system.
55 * Configuration notes :
56 * The current driver does not support interrupt sharing with the
57 * sound portion of the card. If you use the same irq for the
58 * scsi port and sound you will have problems. Either use
59 * a different irq for the scsi port or don't use interrupts
62 * If you have problems with your card not being recognized, use
63 * the LILO command line override. Try to get it recognized without
64 * interrupts. Ie, for a board at the default 0x388 base port,
65 * boot: linux pas16=0x388,0
67 * NO_IRQ (0) should be specified for no interrupt,
68 * IRQ_AUTO (254) to autoprobe for an IRQ line if overridden
69 * on the command line.
72 #include <linux/module.h>
74 #include <linux/signal.h>
75 #include <linux/proc_fs.h>
78 #include <linux/blkdev.h>
79 #include <linux/delay.h>
80 #include <linux/interrupt.h>
81 #include <linux/stat.h>
82 #include <linux/init.h>
85 #include <scsi/scsi_host.h>
91 static unsigned short pas16_addr = 0;
92 static int pas16_irq = 0;
95 static const int scsi_irq_translate[] =
96 { 0, 0, 1, 2, 3, 4, 5, 6, 0, 0, 7, 8, 9, 0, 10, 11 };
98 /* The default_irqs array contains values used to set the irq into the
99 * board via software (as must be done on newer model boards without
100 * irq jumpers on the board). The first value in the array will be
101 * assigned to logical board 0, the next to board 1, etc.
103 static int default_irqs[] __initdata =
104 { PAS16_DEFAULT_BOARD_1_IRQ,
105 PAS16_DEFAULT_BOARD_2_IRQ,
106 PAS16_DEFAULT_BOARD_3_IRQ,
107 PAS16_DEFAULT_BOARD_4_IRQ
110 static struct override {
111 unsigned short io_port;
114 #ifdef PAS16_OVERRIDE
115 [] __initdata = PAS16_OVERRIDE;
117 [4] __initdata = {{0,IRQ_AUTO}, {0,IRQ_AUTO}, {0,IRQ_AUTO},
121 #define NO_OVERRIDES ARRAY_SIZE(overrides)
124 unsigned short io_port;
126 } bases[] __initdata =
127 { {PAS16_DEFAULT_BASE_1, 0},
128 {PAS16_DEFAULT_BASE_2, 0},
129 {PAS16_DEFAULT_BASE_3, 0},
130 {PAS16_DEFAULT_BASE_4, 0}
133 #define NO_BASES ARRAY_SIZE(bases)
135 static const unsigned short pas16_offset[ 8 ] =
137 0x1c00, /* OUTPUT_DATA_REG */
138 0x1c01, /* INITIATOR_COMMAND_REG */
139 0x1c02, /* MODE_REG */
140 0x1c03, /* TARGET_COMMAND_REG */
141 0x3c00, /* STATUS_REG ro, SELECT_ENABLE_REG wo */
142 0x3c01, /* BUS_AND_STATUS_REG ro, START_DMA_SEND_REG wo */
143 0x3c02, /* INPUT_DATA_REGISTER ro, (N/A on PAS16 ?)
144 * START_DMA_TARGET_RECEIVE_REG wo
146 0x3c03, /* RESET_PARITY_INTERRUPT_REG ro,
147 * START_DMA_INITIATOR_RECEIVE_REG wo
150 /*----------------------------------------------------------------*/
151 /* the following will set the monitor border color (useful to find
152 where something crashed or gets stuck at */
162 #define rtrc(i) {inb(0x3da); outb(0x31, 0x3c0); outb((i), 0x3c0);}
169 * Function : enable_board( int board_num, unsigned short port )
171 * Purpose : set address in new model board
173 * Inputs : board_num - logical board number 0-3, port - base address
178 enable_board( int board_num, unsigned short port )
180 outb( 0xbc + board_num, MASTER_ADDRESS_PTR );
181 outb( port >> 2, MASTER_ADDRESS_PTR );
187 * Function : init_board( unsigned short port, int irq )
189 * Purpose : Set the board up to handle the SCSI interface
191 * Inputs : port - base address of the board,
192 * irq - irq to assign to the SCSI port
193 * force_irq - set it even if it conflicts with sound driver
198 init_board( unsigned short io_port, int irq, int force_irq )
201 unsigned int pas_irq_code;
203 /* Initialize the SCSI part of the board */
205 outb( 0x30, io_port + P_TIMEOUT_COUNTER_REG ); /* Timeout counter */
206 outb( 0x01, io_port + P_TIMEOUT_STATUS_REG_OFFSET ); /* Reset TC */
207 outb( 0x01, io_port + WAIT_STATE ); /* 1 Wait state */
209 NCR5380_read( RESET_PARITY_INTERRUPT_REG );
211 /* Set the SCSI interrupt pointer without mucking up the sound
212 * interrupt pointer in the same byte.
214 pas_irq_code = ( irq < 16 ) ? scsi_irq_translate[irq] : 0;
215 tmp = inb( io_port + IO_CONFIG_3 );
217 if( (( tmp & 0x0f ) == pas_irq_code) && pas_irq_code > 0
220 printk( "pas16: WARNING: Can't use same irq as sound "
221 "driver -- interrupts disabled\n" );
222 /* Set up the drive parameters, disable 5380 interrupts */
223 outb( 0x4d, io_port + SYS_CONFIG_4 );
227 tmp = ( tmp & 0x0f ) | ( pas_irq_code << 4 );
228 outb( tmp, io_port + IO_CONFIG_3 );
230 /* Set up the drive parameters and enable 5380 interrupts */
231 outb( 0x6d, io_port + SYS_CONFIG_4 );
237 * Function : pas16_hw_detect( unsigned short board_num )
239 * Purpose : determine if a pas16 board is present
241 * Inputs : board_num - logical board number ( 0 - 3 )
243 * Returns : 0 if board not found, 1 if found.
247 pas16_hw_detect( unsigned short board_num )
249 unsigned char board_rev, tmp;
250 unsigned short io_port = bases[ board_num ].io_port;
252 /* See if we can find a PAS16 board at the address associated
253 * with this logical board number.
256 /* First, attempt to take a newer model board out of reset and
257 * give it a base address. This shouldn't affect older boards.
259 enable_board( board_num, io_port );
261 /* Now see if it looks like a PAS16 board */
262 board_rev = inb( io_port + PCB_CONFIG );
264 if( board_rev == 0xff )
267 tmp = board_rev ^ 0xe0;
269 outb( tmp, io_port + PCB_CONFIG );
270 tmp = inb( io_port + PCB_CONFIG );
271 outb( board_rev, io_port + PCB_CONFIG );
273 if( board_rev != tmp ) /* Not a PAS-16 */
276 if( ( inb( io_port + OPERATION_MODE_1 ) & 0x03 ) != 0x03 )
277 return 0; /* return if no SCSI interface found */
279 /* Mediavision has some new model boards that return ID bits
280 * that indicate a SCSI interface, but they're not (LMS). We'll
281 * put in an additional test to try to weed them out.
284 outb( 0x01, io_port + WAIT_STATE ); /* 1 Wait state */
285 NCR5380_write( MODE_REG, 0x20 ); /* Is it really SCSI? */
286 if( NCR5380_read( MODE_REG ) != 0x20 ) /* Write to a reg. */
287 return 0; /* and try to read */
288 NCR5380_write( MODE_REG, 0x00 ); /* it back. */
289 if( NCR5380_read( MODE_REG ) != 0x00 )
298 * Function : pas16_setup(char *str, int *ints)
300 * Purpose : LILO command line initialization of the overrides array,
302 * Inputs : str - unused, ints - array of integer parameters with ints[0]
303 * equal to the number of ints.
307 static int __init pas16_setup(char *str)
309 static int commandline_current = 0;
313 get_options(str, ARRAY_SIZE(ints), ints);
315 printk("pas16_setup : usage pas16=io_port,irq\n");
317 if (commandline_current < NO_OVERRIDES) {
318 overrides[commandline_current].io_port = (unsigned short) ints[1];
319 overrides[commandline_current].irq = ints[2];
320 for (i = 0; i < NO_BASES; ++i)
321 if (bases[i].io_port == (unsigned short) ints[1]) {
325 ++commandline_current;
330 __setup("pas16=", pas16_setup);
334 * Function : int pas16_detect(struct scsi_host_template * tpnt)
336 * Purpose : detects and initializes PAS16 controllers
337 * that were autoprobed, overridden on the LILO command line,
338 * or specified at compile time.
340 * Inputs : tpnt - template for this SCSI adapter.
342 * Returns : 1 if a host adapter was found, 0 if not.
346 static int __init pas16_detect(struct scsi_host_template *tpnt)
348 static int current_override = 0;
349 static unsigned short current_base = 0;
350 struct Scsi_Host *instance;
351 unsigned short io_port;
354 if (pas16_addr != 0) {
355 overrides[0].io_port = pas16_addr;
357 * This is how we avoid seeing more than
358 * one host adapter at the same I/O port.
359 * Cribbed shamelessly from pas16_setup().
361 for (count = 0; count < NO_BASES; ++count)
362 if (bases[count].io_port == pas16_addr) {
363 bases[count].noauto = 1;
368 overrides[0].irq = pas16_irq;
370 for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
373 if (overrides[current_override].io_port)
375 io_port = overrides[current_override].io_port;
376 enable_board( current_override, io_port );
377 init_board( io_port, overrides[current_override].irq, 1 );
380 for (; !io_port && (current_base < NO_BASES); ++current_base) {
381 #if (PDEBUG & PDEBUG_INIT)
382 printk("scsi-pas16 : probing io_port %04x\n", (unsigned int) bases[current_base].io_port);
384 if ( !bases[current_base].noauto &&
385 pas16_hw_detect( current_base ) ){
386 io_port = bases[current_base].io_port;
387 init_board( io_port, default_irqs[ current_base ], 0 );
388 #if (PDEBUG & PDEBUG_INIT)
389 printk("scsi-pas16 : detected board.\n");
395 #if defined(PDEBUG) && (PDEBUG & PDEBUG_INIT)
396 printk("scsi-pas16 : io_port = %04x\n", (unsigned int) io_port);
402 instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata));
406 instance->io_port = io_port;
408 NCR5380_init(instance, 0);
410 if (overrides[current_override].irq != IRQ_AUTO)
411 instance->irq = overrides[current_override].irq;
413 instance->irq = NCR5380_probe_irq(instance, PAS16_IRQS);
415 /* Compatibility with documented NCR5380 kernel parameters */
416 if (instance->irq == 255)
417 instance->irq = NO_IRQ;
419 if (instance->irq != NO_IRQ)
420 if (request_irq(instance->irq, pas16_intr, 0,
421 "pas16", instance)) {
422 printk("scsi%d : IRQ%d not free, interrupts disabled\n",
423 instance->host_no, instance->irq);
424 instance->irq = NO_IRQ;
427 if (instance->irq == NO_IRQ) {
428 printk("scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
429 printk("scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
430 /* Disable 5380 interrupts, leave drive params the same */
431 outb( 0x4d, io_port + SYS_CONFIG_4 );
432 outb( (inb(io_port + IO_CONFIG_3) & 0x0f), io_port + IO_CONFIG_3 );
435 #if defined(PDEBUG) && (PDEBUG & PDEBUG_INIT)
436 printk("scsi%d : irq = %d\n", instance->host_no, instance->irq);
446 * Function : int pas16_biosparam(Disk *disk, struct block_device *dev, int *ip)
448 * Purpose : Generates a BIOS / DOS compatible H-C-S mapping for
449 * the specified device / size.
451 * Inputs : size = size of device in sectors (512 bytes), dev = block device
452 * major / minor, ip[] = {heads, sectors, cylinders}
454 * Returns : always 0 (success), initializes ip
459 * XXX Most SCSI boards use this mapping, I could be incorrect. Some one
460 * using hard disks on a trantor should verify that this mapping corresponds
461 * to that used by the BIOS / ASPI driver by running the linux fdisk program
462 * and matching the H_C_S coordinates to what DOS uses.
465 static int pas16_biosparam(struct scsi_device *sdev, struct block_device *dev,
466 sector_t capacity, int *ip)
471 ip[2] = size >> 11; /* I think I have it as /(32*64) */
472 if( ip[2] > 1024 ) { /* yes, >, not >= */
476 if( ip[2] > 1023 ) /* yes >1023... */
484 * Function : int NCR5380_pread (struct Scsi_Host *instance,
485 * unsigned char *dst, int len)
487 * Purpose : Fast 5380 pseudo-dma read function, transfers len bytes to
490 * Inputs : dst = destination, len = length in bytes
492 * Returns : 0 on success, non zero on a failure such as a watchdog
496 static inline int NCR5380_pread (struct Scsi_Host *instance, unsigned char *dst,
498 register unsigned char *d = dst;
499 register unsigned short reg = (unsigned short) (instance->io_port +
501 register int i = len;
503 struct NCR5380_hostdata *hostdata = shost_priv(instance);
505 while ( !(inb(instance->io_port + P_STATUS_REG_OFFSET) & P_ST_RDY) )
510 if ( inb(instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET) & P_TS_TIM) {
511 outb( P_TS_CT, instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET);
512 printk("scsi%d : watchdog timer fired in NCR5380_pread()\n",
516 if (ii > hostdata->spin_max_r)
517 hostdata->spin_max_r = ii;
522 * Function : int NCR5380_pwrite (struct Scsi_Host *instance,
523 * unsigned char *src, int len)
525 * Purpose : Fast 5380 pseudo-dma write function, transfers len bytes from
528 * Inputs : src = source, len = length in bytes
530 * Returns : 0 on success, non zero on a failure such as a watchdog
534 static inline int NCR5380_pwrite (struct Scsi_Host *instance, unsigned char *src,
536 register unsigned char *s = src;
537 register unsigned short reg = (instance->io_port + P_DATA_REG_OFFSET);
538 register int i = len;
540 struct NCR5380_hostdata *hostdata = shost_priv(instance);
542 while ( !((inb(instance->io_port + P_STATUS_REG_OFFSET)) & P_ST_RDY) )
547 if (inb(instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET) & P_TS_TIM) {
548 outb( P_TS_CT, instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET);
549 printk("scsi%d : watchdog timer fired in NCR5380_pwrite()\n",
553 if (ii > hostdata->spin_max_w)
554 hostdata->spin_max_w = ii;
560 static int pas16_release(struct Scsi_Host *shost)
562 if (shost->irq != NO_IRQ)
563 free_irq(shost->irq, shost);
565 if (shost->io_port && shost->n_io_port)
566 release_region(shost->io_port, shost->n_io_port);
567 scsi_unregister(shost);
571 static struct scsi_host_template driver_template = {
572 .name = "Pro Audio Spectrum-16 SCSI",
573 .detect = pas16_detect,
574 .release = pas16_release,
575 .proc_name = "pas16",
576 .show_info = pas16_show_info,
577 .write_info = pas16_write_info,
579 .queuecommand = pas16_queue_command,
580 .eh_abort_handler = pas16_abort,
581 .eh_bus_reset_handler = pas16_bus_reset,
582 .bios_param = pas16_biosparam,
583 .can_queue = CAN_QUEUE,
585 .sg_tablesize = SG_ALL,
586 .cmd_per_lun = CMD_PER_LUN,
587 .use_clustering = DISABLE_CLUSTERING,
589 #include "scsi_module.c"
592 module_param(pas16_addr, ushort, 0);
593 module_param(pas16_irq, int, 0);
595 MODULE_LICENSE("GPL");