2 * Generic Generic NCR5380 driver
4 * Copyright 1993, Drew Eckhardt
6 * (Unix and Linux consulting and custom programming)
10 * NCR53C400 extensions (c) 1994,1995,1996, Kevin Lentin
11 * K.Lentin@cs.monash.edu.au
13 * NCR53C400A extensions (c) 1996, Ingmar Baumgart
14 * ingmar@gonzo.schwaben.de
16 * DTC3181E extensions (c) 1997, Ronald van Cuijlenborg
17 * ronald.van.cuijlenborg@tip.nl or nutty@dds.nl
19 * Added ISAPNP support for DTC436 adapters,
20 * Thomas Sailer, sailer@ife.ee.ethz.ch
24 * TODO : flesh out DMA support, find some one actually using this (I have
25 * a memory mapped Trantor board that works fine)
29 * The card is detected and initialized in one of several ways :
30 * 1. With command line overrides - NCR5380=port,irq may be
31 * used on the LILO command line to override the defaults.
33 * 2. With the GENERIC_NCR5380_OVERRIDE compile time define. This is
34 * specified as an array of address, irq, dma, board tuples. Ie, for
35 * one board at 0x350, IRQ5, no dma, I could say
36 * -DGENERIC_NCR5380_OVERRIDE={{0xcc000, 5, DMA_NONE, BOARD_NCR5380}}
38 * -1 should be specified for no or DMA interrupt, -2 to autoprobe for an
39 * IRQ line if overridden on the command line.
41 * 3. When included as a module, with arguments passed on the command line:
42 * ncr_irq=xx the interrupt
43 * ncr_addr=xx the port or base address (for port or memory
46 * ncr_5380=1 to set up for a NCR5380 board
47 * ncr_53c400=1 to set up for a NCR53C400 board
49 * modprobe g_NCR5380 ncr_irq=5 ncr_addr=0x350 ncr_5380=1
50 * for a port mapped NCR5380 board or
51 * modprobe g_NCR5380 ncr_irq=255 ncr_addr=0xc8000 ncr_53c400=1
52 * for a memory mapped NCR53C400 board with interrupts disabled.
54 * 255 should be specified for no or DMA interrupt, 254 to autoprobe for an
55 * IRQ line if overridden on the command line.
59 /* settings for DTC3181E card with only Mustek scanner attached */
60 #define USLEEP_POLL msecs_to_jiffies(10)
61 #define USLEEP_SLEEP msecs_to_jiffies(200)
62 #define USLEEP_WAITLONG msecs_to_jiffies(5000)
66 #ifdef CONFIG_SCSI_GENERIC_NCR53C400
67 #define NCR53C400_PSEUDO_DMA 1
73 #include <linux/signal.h>
74 #include <linux/blkdev.h>
75 #include <scsi/scsi_host.h>
76 #include "g_NCR5380.h"
78 #include <linux/stat.h>
79 #include <linux/init.h>
80 #include <linux/ioport.h>
81 #include <linux/isapnp.h>
82 #include <linux/delay.h>
83 #include <linux/interrupt.h>
86 static int ncr_irq
= NCR_NOT_SET
;
87 static int ncr_dma
= NCR_NOT_SET
;
88 static int ncr_addr
= NCR_NOT_SET
;
89 static int ncr_5380
= NCR_NOT_SET
;
90 static int ncr_53c400
= NCR_NOT_SET
;
91 static int ncr_53c400a
= NCR_NOT_SET
;
92 static int dtc_3181e
= NCR_NOT_SET
;
94 static struct override
{
95 NCR5380_map_type NCR5380_map_name
;
98 int board
; /* Use NCR53c400, Ricoh, etc. extensions ? */
100 #ifdef GENERIC_NCR5380_OVERRIDE
101 [] __initdata
= GENERIC_NCR5380_OVERRIDE
;
103 [1] __initdata
= { { 0,},};
106 #define NO_OVERRIDES ARRAY_SIZE(overrides)
111 * internal_setup - handle lilo command string override
112 * @board: BOARD_* identifier for the board
114 * @ints: numeric parameters
116 * Do LILO command line initialization of the overrides array. Display
122 static void __init
internal_setup(int board
, char *str
, int *ints
)
124 static int commandline_current
= 0;
127 if (ints
[0] != 2 && ints
[0] != 3) {
128 printk(KERN_ERR
"generic_NCR5380_setup : usage ncr5380=" STRVAL(NCR5380_map_name
) ",irq,dma\n");
132 case BOARD_NCR53C400
:
134 printk(KERN_ERR
"generic_NCR53C400_setup : usage ncr53c400=" STRVAL(NCR5380_map_name
) ",irq\n");
138 case BOARD_NCR53C400A
:
140 printk(KERN_ERR
"generic_NCR53C400A_setup : usage ncr53c400a=" STRVAL(NCR5380_map_name
) ",irq\n");
146 printk("generic_DTC3181E_setup : usage dtc3181e=" STRVAL(NCR5380_map_name
) ",irq\n");
152 if (commandline_current
< NO_OVERRIDES
) {
153 overrides
[commandline_current
].NCR5380_map_name
= (NCR5380_map_type
) ints
[1];
154 overrides
[commandline_current
].irq
= ints
[2];
156 overrides
[commandline_current
].dma
= ints
[3];
158 overrides
[commandline_current
].dma
= DMA_NONE
;
159 overrides
[commandline_current
].board
= board
;
160 ++commandline_current
;
166 * do_NCR53C80_setup - set up entry point
169 * Setup function invoked at boot to parse the ncr5380= command
173 static int __init
do_NCR5380_setup(char *str
)
177 get_options(str
, ARRAY_SIZE(ints
), ints
);
178 internal_setup(BOARD_NCR5380
, str
, ints
);
183 * do_NCR53C400_setup - set up entry point
185 * @ints: integer parameters from kernel setup code
187 * Setup function invoked at boot to parse the ncr53c400= command
191 static int __init
do_NCR53C400_setup(char *str
)
195 get_options(str
, ARRAY_SIZE(ints
), ints
);
196 internal_setup(BOARD_NCR53C400
, str
, ints
);
201 * do_NCR53C400A_setup - set up entry point
203 * @ints: integer parameters from kernel setup code
205 * Setup function invoked at boot to parse the ncr53c400a= command
209 static int __init
do_NCR53C400A_setup(char *str
)
213 get_options(str
, ARRAY_SIZE(ints
), ints
);
214 internal_setup(BOARD_NCR53C400A
, str
, ints
);
219 * do_DTC3181E_setup - set up entry point
221 * @ints: integer parameters from kernel setup code
223 * Setup function invoked at boot to parse the dtc3181e= command
227 static int __init
do_DTC3181E_setup(char *str
)
231 get_options(str
, ARRAY_SIZE(ints
), ints
);
232 internal_setup(BOARD_DTC3181E
, str
, ints
);
239 * generic_NCR5380_detect - look for NCR5380 controllers
240 * @tpnt: the scsi template
242 * Scan for the present of NCR5380, NCR53C400, NCR53C400A, DTC3181E
243 * and DTC436(ISAPnP) controllers. If overrides have been set we use
246 * The caller supplied NCR5380_init function is invoked from here, before
247 * the interrupt line is taken.
252 static int __init
generic_NCR5380_detect(struct scsi_host_template
*tpnt
)
254 static int current_override
= 0;
257 #ifndef SCSI_G_NCR5380_MEM
259 unsigned long region_size
= 16;
261 static unsigned int __initdata ncr_53c400a_ports
[] = {
262 0x280, 0x290, 0x300, 0x310, 0x330, 0x340, 0x348, 0x350, 0
264 static unsigned int __initdata dtc_3181e_ports
[] = {
265 0x220, 0x240, 0x280, 0x2a0, 0x2c0, 0x300, 0x320, 0x340, 0
268 struct Scsi_Host
*instance
;
269 #ifdef SCSI_G_NCR5380_MEM
274 if (ncr_irq
!= NCR_NOT_SET
)
275 overrides
[0].irq
= ncr_irq
;
276 if (ncr_dma
!= NCR_NOT_SET
)
277 overrides
[0].dma
= ncr_dma
;
278 if (ncr_addr
!= NCR_NOT_SET
)
279 overrides
[0].NCR5380_map_name
= (NCR5380_map_type
) ncr_addr
;
280 if (ncr_5380
!= NCR_NOT_SET
)
281 overrides
[0].board
= BOARD_NCR5380
;
282 else if (ncr_53c400
!= NCR_NOT_SET
)
283 overrides
[0].board
= BOARD_NCR53C400
;
284 else if (ncr_53c400a
!= NCR_NOT_SET
)
285 overrides
[0].board
= BOARD_NCR53C400A
;
286 else if (dtc_3181e
!= NCR_NOT_SET
)
287 overrides
[0].board
= BOARD_DTC3181E
;
288 #ifndef SCSI_G_NCR5380_MEM
289 if (!current_override
&& isapnp_present()) {
290 struct pnp_dev
*dev
= NULL
;
292 while ((dev
= pnp_find_dev(NULL
, ISAPNP_VENDOR('D', 'T', 'C'), ISAPNP_FUNCTION(0x436e), dev
))) {
293 if (count
>= NO_OVERRIDES
)
295 if (pnp_device_attach(dev
) < 0)
297 if (pnp_activate_dev(dev
) < 0) {
298 printk(KERN_ERR
"dtc436e probe: activate failed\n");
299 pnp_device_detach(dev
);
302 if (!pnp_port_valid(dev
, 0)) {
303 printk(KERN_ERR
"dtc436e probe: no valid port\n");
304 pnp_device_detach(dev
);
307 if (pnp_irq_valid(dev
, 0))
308 overrides
[count
].irq
= pnp_irq(dev
, 0);
310 overrides
[count
].irq
= NO_IRQ
;
311 if (pnp_dma_valid(dev
, 0))
312 overrides
[count
].dma
= pnp_dma(dev
, 0);
314 overrides
[count
].dma
= DMA_NONE
;
315 overrides
[count
].NCR5380_map_name
= (NCR5380_map_type
) pnp_port_start(dev
, 0);
316 overrides
[count
].board
= BOARD_DTC3181E
;
321 tpnt
->proc_name
= "g_NCR5380";
323 for (count
= 0; current_override
< NO_OVERRIDES
; ++current_override
) {
324 if (!(overrides
[current_override
].NCR5380_map_name
))
328 switch (overrides
[current_override
].board
) {
330 flags
= FLAG_NO_PSEUDO_DMA
;
332 case BOARD_NCR53C400
:
333 flags
= FLAG_NCR53C400
;
335 case BOARD_NCR53C400A
:
336 flags
= FLAG_NO_PSEUDO_DMA
;
337 ports
= ncr_53c400a_ports
;
340 flags
= FLAG_NO_PSEUDO_DMA
| FLAG_DTC3181E
;
341 ports
= dtc_3181e_ports
;
345 #ifndef SCSI_G_NCR5380_MEM
347 /* wakeup sequence for the NCR53C400A and DTC3181E */
349 /* Disable the adapter and look for a free io port */
357 if (overrides
[current_override
].NCR5380_map_name
!= PORT_AUTO
)
358 for (i
= 0; ports
[i
]; i
++) {
359 if (!request_region(ports
[i
], 16, "ncr53c80"))
361 if (overrides
[current_override
].NCR5380_map_name
== ports
[i
])
363 release_region(ports
[i
], 16);
365 for (i
= 0; ports
[i
]; i
++) {
366 if (!request_region(ports
[i
], 16, "ncr53c80"))
368 if (inb(ports
[i
]) == 0xff)
370 release_region(ports
[i
], 16);
373 /* At this point we have our region reserved */
379 outb(0x80 | i
, 0x379); /* set io port to be used */
380 outb(0xc0, ports
[i
] + 9);
381 if (inb(ports
[i
] + 9) != 0x80)
384 overrides
[current_override
].NCR5380_map_name
= ports
[i
];
390 /* Not a 53C400A style setup - just grab */
391 if(!(request_region(overrides
[current_override
].NCR5380_map_name
, NCR5380_region_size
, "ncr5380")))
393 region_size
= NCR5380_region_size
;
396 base
= overrides
[current_override
].NCR5380_map_name
;
397 if (!request_mem_region(base
, NCR5380_region_size
, "ncr5380"))
399 iomem
= ioremap(base
, NCR5380_region_size
);
401 release_mem_region(base
, NCR5380_region_size
);
405 instance
= scsi_register(tpnt
, sizeof(struct NCR5380_hostdata
));
406 if (instance
== NULL
) {
407 #ifndef SCSI_G_NCR5380_MEM
408 release_region(overrides
[current_override
].NCR5380_map_name
, region_size
);
411 release_mem_region(base
, NCR5380_region_size
);
416 instance
->NCR5380_instance_name
= overrides
[current_override
].NCR5380_map_name
;
417 #ifndef SCSI_G_NCR5380_MEM
418 instance
->n_io_port
= region_size
;
420 ((struct NCR5380_hostdata
*)instance
->hostdata
)->iomem
= iomem
;
423 NCR5380_init(instance
, flags
);
425 if (overrides
[current_override
].irq
!= IRQ_AUTO
)
426 instance
->irq
= overrides
[current_override
].irq
;
428 instance
->irq
= NCR5380_probe_irq(instance
, 0xffff);
430 /* Compatibility with documented NCR5380 kernel parameters */
431 if (instance
->irq
== 255)
432 instance
->irq
= NO_IRQ
;
434 if (instance
->irq
!= NO_IRQ
)
435 if (request_irq(instance
->irq
, generic_NCR5380_intr
,
436 0, "NCR5380", instance
)) {
437 printk(KERN_WARNING
"scsi%d : IRQ%d not free, interrupts disabled\n", instance
->host_no
, instance
->irq
);
438 instance
->irq
= NO_IRQ
;
441 if (instance
->irq
== NO_IRQ
) {
442 printk(KERN_INFO
"scsi%d : interrupts not enabled. for better interactive performance,\n", instance
->host_no
);
443 printk(KERN_INFO
"scsi%d : please jumper the board for a free IRQ.\n", instance
->host_no
);
453 * generic_NCR5380_release_resources - free resources
454 * @instance: host adapter to clean up
456 * Free the generic interface resources from this adapter.
461 static int generic_NCR5380_release_resources(struct Scsi_Host
*instance
)
463 NCR5380_local_declare();
464 NCR5380_setup(instance
);
466 if (instance
->irq
!= NO_IRQ
)
467 free_irq(instance
->irq
, instance
);
468 NCR5380_exit(instance
);
470 #ifndef SCSI_G_NCR5380_MEM
471 release_region(instance
->NCR5380_instance_name
, instance
->n_io_port
);
473 iounmap(((struct NCR5380_hostdata
*)instance
->hostdata
)->iomem
);
474 release_mem_region(instance
->NCR5380_instance_name
, NCR5380_region_size
);
483 * generic_NCR5380_biosparam
484 * @disk: disk to compute geometry for
485 * @dev: device identifier for this disk
486 * @ip: sizes to fill in
488 * Generates a BIOS / DOS compatible H-C-S mapping for the specified
491 * XXX Most SCSI boards use this mapping, I could be incorrect. Someone
492 * using hard disks on a trantor should verify that this mapping
493 * corresponds to that used by the BIOS / ASPI driver by running the linux
494 * fdisk program and matching the H_C_S coordinates to what DOS uses.
500 generic_NCR5380_biosparam(struct scsi_device
*sdev
, struct block_device
*bdev
,
501 sector_t capacity
, int *ip
)
505 ip
[2] = capacity
>> 11;
510 #ifdef NCR53C400_PSEUDO_DMA
513 * NCR5380_pread - pseudo DMA read
514 * @instance: adapter to read from
515 * @dst: buffer to read into
516 * @len: buffer length
518 * Perform a pseudo DMA mode read from an NCR53C400 or equivalent
522 static inline int NCR5380_pread(struct Scsi_Host
*instance
, unsigned char *dst
, int len
)
524 int blocks
= len
/ 128;
528 NCR5380_local_declare();
529 NCR5380_setup(instance
);
531 NCR5380_write(C400_CONTROL_STATUS_REG
, CSR_BASE
| CSR_TRANS_DIR
);
532 NCR5380_write(C400_BLOCK_COUNTER_REG
, blocks
);
534 if ((bl
= NCR5380_read(C400_BLOCK_COUNTER_REG
)) == 0) {
537 if (NCR5380_read(C400_CONTROL_STATUS_REG
) & CSR_GATED_53C80_IRQ
) {
538 printk(KERN_ERR
"53C400r: Got 53C80_IRQ start=%d, blocks=%d\n", start
, blocks
);
541 while (NCR5380_read(C400_CONTROL_STATUS_REG
) & CSR_HOST_BUF_NOT_RDY
)
543 // FIXME - no timeout
546 #ifndef SCSI_G_NCR5380_MEM
549 for (i
= 0; i
< 128; i
++)
550 dst
[start
+ i
] = NCR5380_read(C400_HOST_BUFFER
);
553 /* implies SCSI_G_NCR5380_MEM */
554 memcpy_fromio(dst
+ start
, iomem
+ NCR53C400_host_buffer
, 128);
561 while (NCR5380_read(C400_CONTROL_STATUS_REG
) & CSR_HOST_BUF_NOT_RDY
)
563 // FIXME - no timeout
566 #ifndef SCSI_G_NCR5380_MEM
569 for (i
= 0; i
< 128; i
++)
570 dst
[start
+ i
] = NCR5380_read(C400_HOST_BUFFER
);
573 /* implies SCSI_G_NCR5380_MEM */
574 memcpy_fromio(dst
+ start
, iomem
+ NCR53C400_host_buffer
, 128);
580 if (!(NCR5380_read(C400_CONTROL_STATUS_REG
) & CSR_GATED_53C80_IRQ
))
581 printk("53C400r: no 53C80 gated irq after transfer");
585 * DON'T DO THIS - THEY NEVER ARRIVE!
587 printk("53C400r: Waiting for 53C80 registers\n");
588 while (NCR5380_read(C400_CONTROL_STATUS_REG
) & CSR_53C80_REG
)
591 if (!(NCR5380_read(BUS_AND_STATUS_REG
) & BASR_END_DMA_TRANSFER
))
592 printk(KERN_ERR
"53C400r: no end dma signal\n");
594 NCR5380_write(MODE_REG
, MR_BASE
);
595 NCR5380_read(RESET_PARITY_INTERRUPT_REG
);
600 * NCR5380_write - pseudo DMA write
601 * @instance: adapter to read from
602 * @dst: buffer to read into
603 * @len: buffer length
605 * Perform a pseudo DMA mode read from an NCR53C400 or equivalent
609 static inline int NCR5380_pwrite(struct Scsi_Host
*instance
, unsigned char *src
, int len
)
611 int blocks
= len
/ 128;
616 NCR5380_local_declare();
617 NCR5380_setup(instance
);
619 NCR5380_write(C400_CONTROL_STATUS_REG
, CSR_BASE
);
620 NCR5380_write(C400_BLOCK_COUNTER_REG
, blocks
);
622 if (NCR5380_read(C400_CONTROL_STATUS_REG
) & CSR_GATED_53C80_IRQ
) {
623 printk(KERN_ERR
"53C400w: Got 53C80_IRQ start=%d, blocks=%d\n", start
, blocks
);
627 if ((bl
= NCR5380_read(C400_BLOCK_COUNTER_REG
)) == 0) {
630 while (NCR5380_read(C400_CONTROL_STATUS_REG
) & CSR_HOST_BUF_NOT_RDY
)
632 #ifndef SCSI_G_NCR5380_MEM
634 for (i
= 0; i
< 128; i
++)
635 NCR5380_write(C400_HOST_BUFFER
, src
[start
+ i
]);
638 /* implies SCSI_G_NCR5380_MEM */
639 memcpy_toio(iomem
+ NCR53C400_host_buffer
, src
+ start
, 128);
645 while (NCR5380_read(C400_CONTROL_STATUS_REG
) & CSR_HOST_BUF_NOT_RDY
)
646 ; // FIXME - no timeout
648 #ifndef SCSI_G_NCR5380_MEM
650 for (i
= 0; i
< 128; i
++)
651 NCR5380_write(C400_HOST_BUFFER
, src
[start
+ i
]);
654 /* implies SCSI_G_NCR5380_MEM */
655 memcpy_toio(iomem
+ NCR53C400_host_buffer
, src
+ start
, 128);
662 printk("53C400w: waiting for registers to be available\n");
663 THEY NEVER DO
! while (NCR5380_read(C400_CONTROL_STATUS_REG
) & CSR_53C80_REG
);
664 printk("53C400w: Got em\n");
667 /* Let's wait for this instead - could be ugly */
668 /* All documentation says to check for this. Maybe my hardware is too
669 * fast. Waiting for it seems to work fine! KLL
671 while (!(i
= NCR5380_read(C400_CONTROL_STATUS_REG
) & CSR_GATED_53C80_IRQ
))
672 ; // FIXME - no timeout
675 * I know. i is certainly != 0 here but the loop is new. See previous
679 if (!((i
= NCR5380_read(BUS_AND_STATUS_REG
)) & BASR_END_DMA_TRANSFER
))
680 printk(KERN_ERR
"53C400w: No END OF DMA bit - WHOOPS! BASR=%0x\n", i
);
682 printk(KERN_ERR
"53C400w: no 53C80 gated irq after transfer (last block)\n");
685 if (!(NCR5380_read(BUS_AND_STATUS_REG
) & BASR_END_DMA_TRANSFER
)) {
686 printk(KERN_ERR
"53C400w: no end dma signal\n");
689 while (!(NCR5380_read(TARGET_COMMAND_REG
) & TCR_LAST_BYTE_SENT
))
693 #endif /* PSEUDO_DMA */
696 * Include the NCR5380 core code that we build our driver around
701 static struct scsi_host_template driver_template
= {
702 .show_info
= generic_NCR5380_show_info
,
703 .name
= "Generic NCR5380/NCR53C400 SCSI",
704 .detect
= generic_NCR5380_detect
,
705 .release
= generic_NCR5380_release_resources
,
706 .info
= generic_NCR5380_info
,
707 .queuecommand
= generic_NCR5380_queue_command
,
708 .eh_abort_handler
= generic_NCR5380_abort
,
709 .eh_bus_reset_handler
= generic_NCR5380_bus_reset
,
710 .bios_param
= NCR5380_BIOSPARAM
,
711 .can_queue
= CAN_QUEUE
,
713 .sg_tablesize
= SG_ALL
,
714 .cmd_per_lun
= CMD_PER_LUN
,
715 .use_clustering
= DISABLE_CLUSTERING
,
717 #include <linux/module.h>
718 #include "scsi_module.c"
720 module_param(ncr_irq
, int, 0);
721 module_param(ncr_dma
, int, 0);
722 module_param(ncr_addr
, int, 0);
723 module_param(ncr_5380
, int, 0);
724 module_param(ncr_53c400
, int, 0);
725 module_param(ncr_53c400a
, int, 0);
726 module_param(dtc_3181e
, int, 0);
727 MODULE_LICENSE("GPL");
729 #if !defined(SCSI_G_NCR5380_MEM) && defined(MODULE)
730 static struct isapnp_device_id id_table
[] = {
732 ISAPNP_ANY_ID
, ISAPNP_ANY_ID
,
733 ISAPNP_VENDOR('D', 'T', 'C'), ISAPNP_FUNCTION(0x436e),
738 MODULE_DEVICE_TABLE(isapnp
, id_table
);
741 __setup("ncr5380=", do_NCR5380_setup
);
742 __setup("ncr53c400=", do_NCR53C400_setup
);
743 __setup("ncr53c400a=", do_NCR53C400A_setup
);
744 __setup("dtc3181e=", do_DTC3181E_setup
);