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.
61 #ifdef CONFIG_SCSI_GENERIC_NCR53C400
66 #include <linux/blkdev.h>
67 #include <linux/module.h>
68 #include <scsi/scsi_host.h>
69 #include "g_NCR5380.h"
71 #include <linux/init.h>
72 #include <linux/ioport.h>
73 #include <linux/isapnp.h>
74 #include <linux/interrupt.h>
80 static int ncr_53c400;
81 static int ncr_53c400a;
85 static struct override {
86 NCR5380_map_type NCR5380_map_name;
89 int board; /* Use NCR53c400, Ricoh, etc. extensions ? */
91 #ifdef GENERIC_NCR5380_OVERRIDE
92 [] __initdata = GENERIC_NCR5380_OVERRIDE;
94 [1] __initdata = { { 0,},};
97 #define NO_OVERRIDES ARRAY_SIZE(overrides)
102 * internal_setup - handle lilo command string override
103 * @board: BOARD_* identifier for the board
105 * @ints: numeric parameters
107 * Do LILO command line initialization of the overrides array. Display
113 static void __init internal_setup(int board, char *str, int *ints)
115 static int commandline_current;
118 if (ints[0] != 2 && ints[0] != 3) {
119 printk(KERN_ERR "generic_NCR5380_setup : usage ncr5380=" STRVAL(NCR5380_map_name) ",irq,dma\n");
123 case BOARD_NCR53C400:
125 printk(KERN_ERR "generic_NCR53C400_setup : usage ncr53c400=" STRVAL(NCR5380_map_name) ",irq\n");
129 case BOARD_NCR53C400A:
131 printk(KERN_ERR "generic_NCR53C400A_setup : usage ncr53c400a=" STRVAL(NCR5380_map_name) ",irq\n");
137 printk("generic_DTC3181E_setup : usage dtc3181e=" STRVAL(NCR5380_map_name) ",irq\n");
143 if (commandline_current < NO_OVERRIDES) {
144 overrides[commandline_current].NCR5380_map_name = (NCR5380_map_type) ints[1];
145 overrides[commandline_current].irq = ints[2];
147 overrides[commandline_current].dma = ints[3];
149 overrides[commandline_current].dma = DMA_NONE;
150 overrides[commandline_current].board = board;
151 ++commandline_current;
157 * do_NCR53C80_setup - set up entry point
160 * Setup function invoked at boot to parse the ncr5380= command
164 static int __init do_NCR5380_setup(char *str)
168 get_options(str, ARRAY_SIZE(ints), ints);
169 internal_setup(BOARD_NCR5380, str, ints);
174 * do_NCR53C400_setup - set up entry point
176 * @ints: integer parameters from kernel setup code
178 * Setup function invoked at boot to parse the ncr53c400= command
182 static int __init do_NCR53C400_setup(char *str)
186 get_options(str, ARRAY_SIZE(ints), ints);
187 internal_setup(BOARD_NCR53C400, str, ints);
192 * do_NCR53C400A_setup - set up entry point
194 * @ints: integer parameters from kernel setup code
196 * Setup function invoked at boot to parse the ncr53c400a= command
200 static int __init do_NCR53C400A_setup(char *str)
204 get_options(str, ARRAY_SIZE(ints), ints);
205 internal_setup(BOARD_NCR53C400A, str, ints);
210 * do_DTC3181E_setup - set up entry point
212 * @ints: integer parameters from kernel setup code
214 * Setup function invoked at boot to parse the dtc3181e= command
218 static int __init do_DTC3181E_setup(char *str)
222 get_options(str, ARRAY_SIZE(ints), ints);
223 internal_setup(BOARD_DTC3181E, str, ints);
229 #ifndef SCSI_G_NCR5380_MEM
231 * Configure I/O address of 53C400A or DTC436 by writing magic numbers
232 * to ports 0x779 and 0x379.
234 static void magic_configure(int idx, u8 irq, u8 magic[])
238 outb(magic[0], 0x779);
239 outb(magic[1], 0x379);
240 outb(magic[2], 0x379);
241 outb(magic[3], 0x379);
242 outb(magic[4], 0x379);
244 /* allowed IRQs for HP C2502 */
245 if (irq != 2 && irq != 3 && irq != 4 && irq != 5 && irq != 7)
247 if (idx >= 0 && idx <= 7)
248 cfg = 0x80 | idx | (irq << 4);
254 * generic_NCR5380_detect - look for NCR5380 controllers
255 * @tpnt: the scsi template
257 * Scan for the present of NCR5380, NCR53C400, NCR53C400A, DTC3181E
258 * and DTC436(ISAPnP) controllers. If overrides have been set we use
264 static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt)
266 static int current_override;
270 #ifndef SCSI_G_NCR5380_MEM
273 unsigned long region_size = 16;
275 static unsigned int __initdata ncr_53c400a_ports[] = {
276 0x280, 0x290, 0x300, 0x310, 0x330, 0x340, 0x348, 0x350, 0
278 static unsigned int __initdata dtc_3181e_ports[] = {
279 0x220, 0x240, 0x280, 0x2a0, 0x2c0, 0x300, 0x320, 0x340, 0
281 static u8 ncr_53c400a_magic[] __initdata = { /* 53C400A & DTC436 */
282 0x59, 0xb9, 0xc5, 0xae, 0xa6
284 static u8 hp_c2502_magic[] __initdata = { /* HP C2502 */
285 0x0f, 0x22, 0xf0, 0x20, 0x80
288 struct Scsi_Host *instance;
289 struct NCR5380_hostdata *hostdata;
290 #ifdef SCSI_G_NCR5380_MEM
296 overrides[0].irq = ncr_irq;
298 overrides[0].dma = ncr_dma;
300 overrides[0].NCR5380_map_name = (NCR5380_map_type) ncr_addr;
302 overrides[0].board = BOARD_NCR5380;
304 overrides[0].board = BOARD_NCR53C400;
305 else if (ncr_53c400a)
306 overrides[0].board = BOARD_NCR53C400A;
308 overrides[0].board = BOARD_DTC3181E;
310 overrides[0].board = BOARD_HP_C2502;
311 #ifndef SCSI_G_NCR5380_MEM
312 if (!current_override && isapnp_present()) {
313 struct pnp_dev *dev = NULL;
315 while ((dev = pnp_find_dev(NULL, ISAPNP_VENDOR('D', 'T', 'C'), ISAPNP_FUNCTION(0x436e), dev))) {
316 if (count >= NO_OVERRIDES)
318 if (pnp_device_attach(dev) < 0)
320 if (pnp_activate_dev(dev) < 0) {
321 printk(KERN_ERR "dtc436e probe: activate failed\n");
322 pnp_device_detach(dev);
325 if (!pnp_port_valid(dev, 0)) {
326 printk(KERN_ERR "dtc436e probe: no valid port\n");
327 pnp_device_detach(dev);
330 if (pnp_irq_valid(dev, 0))
331 overrides[count].irq = pnp_irq(dev, 0);
333 overrides[count].irq = NO_IRQ;
334 if (pnp_dma_valid(dev, 0))
335 overrides[count].dma = pnp_dma(dev, 0);
337 overrides[count].dma = DMA_NONE;
338 overrides[count].NCR5380_map_name = (NCR5380_map_type) pnp_port_start(dev, 0);
339 overrides[count].board = BOARD_DTC3181E;
345 for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
346 if (!(overrides[current_override].NCR5380_map_name))
351 switch (overrides[current_override].board) {
353 flags = FLAG_NO_PSEUDO_DMA;
355 case BOARD_NCR53C400:
357 flags = FLAG_NO_DMA_FIXUP;
360 case BOARD_NCR53C400A:
361 flags = FLAG_NO_DMA_FIXUP;
362 ports = ncr_53c400a_ports;
363 magic = ncr_53c400a_magic;
366 flags = FLAG_NO_DMA_FIXUP;
367 ports = ncr_53c400a_ports;
368 magic = hp_c2502_magic;
371 flags = FLAG_NO_DMA_FIXUP;
372 ports = dtc_3181e_ports;
373 magic = ncr_53c400a_magic;
377 #ifndef SCSI_G_NCR5380_MEM
378 if (ports && magic) {
379 /* wakeup sequence for the NCR53C400A and DTC3181E */
381 /* Disable the adapter and look for a free io port */
382 magic_configure(-1, 0, magic);
384 if (overrides[current_override].NCR5380_map_name != PORT_AUTO)
385 for (i = 0; ports[i]; i++) {
386 if (!request_region(ports[i], 16, "ncr53c80"))
388 if (overrides[current_override].NCR5380_map_name == ports[i])
390 release_region(ports[i], 16);
392 for (i = 0; ports[i]; i++) {
393 if (!request_region(ports[i], 16, "ncr53c80"))
395 if (inb(ports[i]) == 0xff)
397 release_region(ports[i], 16);
400 /* At this point we have our region reserved */
401 magic_configure(i, 0, magic); /* no IRQ yet */
402 outb(0xc0, ports[i] + 9);
403 if (inb(ports[i] + 9) != 0x80)
405 overrides[current_override].NCR5380_map_name = ports[i];
412 /* Not a 53C400A style setup - just grab */
413 if(!(request_region(overrides[current_override].NCR5380_map_name, NCR5380_region_size, "ncr5380")))
415 region_size = NCR5380_region_size;
418 base = overrides[current_override].NCR5380_map_name;
419 if (!request_mem_region(base, NCR5380_region_size, "ncr5380"))
421 iomem = ioremap(base, NCR5380_region_size);
423 release_mem_region(base, NCR5380_region_size);
427 instance = scsi_register(tpnt, sizeof(struct NCR5380_hostdata));
428 if (instance == NULL)
430 hostdata = shost_priv(instance);
432 #ifndef SCSI_G_NCR5380_MEM
433 instance->io_port = overrides[current_override].NCR5380_map_name;
434 instance->n_io_port = region_size;
435 hostdata->io_width = 1; /* 8-bit PDMA by default */
438 * On NCR53C400 boards, NCR5380 registers are mapped 8 past
441 switch (overrides[current_override].board) {
442 case BOARD_NCR53C400:
443 instance->io_port += 8;
444 hostdata->c400_ctl_status = 0;
445 hostdata->c400_blk_cnt = 1;
446 hostdata->c400_host_buf = 4;
449 hostdata->io_width = 2; /* 16-bit PDMA */
451 case BOARD_NCR53C400A:
453 hostdata->c400_ctl_status = 9;
454 hostdata->c400_blk_cnt = 10;
455 hostdata->c400_host_buf = 8;
459 instance->base = overrides[current_override].NCR5380_map_name;
460 hostdata->iomem = iomem;
461 switch (overrides[current_override].board) {
462 case BOARD_NCR53C400:
463 hostdata->c400_ctl_status = 0x100;
464 hostdata->c400_blk_cnt = 0x101;
465 hostdata->c400_host_buf = 0x104;
468 case BOARD_NCR53C400A:
470 pr_err(DRV_MODULE_NAME ": unknown register offsets\n");
475 if (NCR5380_init(instance, flags))
478 switch (overrides[current_override].board) {
479 case BOARD_NCR53C400:
481 case BOARD_NCR53C400A:
483 NCR5380_write(hostdata->c400_ctl_status, CSR_BASE);
486 NCR5380_maybe_reset_bus(instance);
488 if (overrides[current_override].irq != IRQ_AUTO)
489 instance->irq = overrides[current_override].irq;
491 instance->irq = NCR5380_probe_irq(instance, 0xffff);
493 /* Compatibility with documented NCR5380 kernel parameters */
494 if (instance->irq == 255)
495 instance->irq = NO_IRQ;
497 if (instance->irq != NO_IRQ) {
498 #ifndef SCSI_G_NCR5380_MEM
499 /* set IRQ for HP C2502 */
500 if (overrides[current_override].board == BOARD_HP_C2502)
501 magic_configure(port_idx, instance->irq, magic);
503 if (request_irq(instance->irq, generic_NCR5380_intr,
504 0, "NCR5380", instance)) {
505 printk(KERN_WARNING "scsi%d : IRQ%d not free, interrupts disabled\n", instance->host_no, instance->irq);
506 instance->irq = NO_IRQ;
510 if (instance->irq == NO_IRQ) {
511 printk(KERN_INFO "scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
512 printk(KERN_INFO "scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
521 scsi_unregister(instance);
523 #ifndef SCSI_G_NCR5380_MEM
524 release_region(overrides[current_override].NCR5380_map_name, region_size);
527 release_mem_region(base, NCR5380_region_size);
533 * generic_NCR5380_release_resources - free resources
534 * @instance: host adapter to clean up
536 * Free the generic interface resources from this adapter.
541 static int generic_NCR5380_release_resources(struct Scsi_Host *instance)
543 if (instance->irq != NO_IRQ)
544 free_irq(instance->irq, instance);
545 NCR5380_exit(instance);
546 #ifndef SCSI_G_NCR5380_MEM
547 release_region(instance->io_port, instance->n_io_port);
549 iounmap(((struct NCR5380_hostdata *)instance->hostdata)->iomem);
550 release_mem_region(instance->base, NCR5380_region_size);
557 * generic_NCR5380_biosparam
558 * @disk: disk to compute geometry for
559 * @dev: device identifier for this disk
560 * @ip: sizes to fill in
562 * Generates a BIOS / DOS compatible H-C-S mapping for the specified
565 * XXX Most SCSI boards use this mapping, I could be incorrect. Someone
566 * using hard disks on a trantor should verify that this mapping
567 * corresponds to that used by the BIOS / ASPI driver by running the linux
568 * fdisk program and matching the H_C_S coordinates to what DOS uses.
574 generic_NCR5380_biosparam(struct scsi_device *sdev, struct block_device *bdev,
575 sector_t capacity, int *ip)
579 ip[2] = capacity >> 11;
587 * NCR5380_pread - pseudo DMA read
588 * @instance: adapter to read from
589 * @dst: buffer to read into
590 * @len: buffer length
592 * Perform a pseudo DMA mode read from an NCR53C400 or equivalent
596 static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst, int len)
598 struct NCR5380_hostdata *hostdata = shost_priv(instance);
599 int blocks = len / 128;
602 NCR5380_write(hostdata->c400_ctl_status, CSR_BASE | CSR_TRANS_DIR);
603 NCR5380_write(hostdata->c400_blk_cnt, blocks);
605 if (NCR5380_read(hostdata->c400_blk_cnt) == 0)
607 if (NCR5380_read(hostdata->c400_ctl_status) & CSR_GATED_53C80_IRQ) {
608 printk(KERN_ERR "53C400r: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks);
611 while (NCR5380_read(hostdata->c400_ctl_status) & CSR_HOST_BUF_NOT_RDY)
612 ; /* FIXME - no timeout */
614 #ifndef SCSI_G_NCR5380_MEM
615 if (hostdata->io_width == 2)
616 insw(instance->io_port + hostdata->c400_host_buf,
619 insb(instance->io_port + hostdata->c400_host_buf,
622 /* implies SCSI_G_NCR5380_MEM */
623 memcpy_fromio(dst + start,
624 hostdata->iomem + NCR53C400_host_buffer, 128);
631 while (NCR5380_read(hostdata->c400_ctl_status) & CSR_HOST_BUF_NOT_RDY)
632 ; /* FIXME - no timeout */
634 #ifndef SCSI_G_NCR5380_MEM
635 if (hostdata->io_width == 2)
636 insw(instance->io_port + hostdata->c400_host_buf,
639 insb(instance->io_port + hostdata->c400_host_buf,
642 /* implies SCSI_G_NCR5380_MEM */
643 memcpy_fromio(dst + start,
644 hostdata->iomem + NCR53C400_host_buffer, 128);
650 if (!(NCR5380_read(hostdata->c400_ctl_status) & CSR_GATED_53C80_IRQ))
651 printk("53C400r: no 53C80 gated irq after transfer");
653 /* wait for 53C80 registers to be available */
654 while (!(NCR5380_read(hostdata->c400_ctl_status) & CSR_53C80_REG))
657 if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER))
658 printk(KERN_ERR "53C400r: no end dma signal\n");
664 * NCR5380_write - pseudo DMA write
665 * @instance: adapter to read from
666 * @dst: buffer to read into
667 * @len: buffer length
669 * Perform a pseudo DMA mode read from an NCR53C400 or equivalent
673 static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src, int len)
675 struct NCR5380_hostdata *hostdata = shost_priv(instance);
676 int blocks = len / 128;
679 NCR5380_write(hostdata->c400_ctl_status, CSR_BASE);
680 NCR5380_write(hostdata->c400_blk_cnt, blocks);
682 if (NCR5380_read(hostdata->c400_ctl_status) & CSR_GATED_53C80_IRQ) {
683 printk(KERN_ERR "53C400w: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks);
687 if (NCR5380_read(hostdata->c400_blk_cnt) == 0)
689 while (NCR5380_read(hostdata->c400_ctl_status) & CSR_HOST_BUF_NOT_RDY)
691 #ifndef SCSI_G_NCR5380_MEM
692 if (hostdata->io_width == 2)
693 outsw(instance->io_port + hostdata->c400_host_buf,
696 outsb(instance->io_port + hostdata->c400_host_buf,
699 /* implies SCSI_G_NCR5380_MEM */
700 memcpy_toio(hostdata->iomem + NCR53C400_host_buffer,
707 while (NCR5380_read(hostdata->c400_ctl_status) & CSR_HOST_BUF_NOT_RDY)
708 ; // FIXME - no timeout
710 #ifndef SCSI_G_NCR5380_MEM
711 if (hostdata->io_width == 2)
712 outsw(instance->io_port + hostdata->c400_host_buf,
715 outsb(instance->io_port + hostdata->c400_host_buf,
718 /* implies SCSI_G_NCR5380_MEM */
719 memcpy_toio(hostdata->iomem + NCR53C400_host_buffer,
726 /* wait for 53C80 registers to be available */
727 while (!(NCR5380_read(hostdata->c400_ctl_status) & CSR_53C80_REG)) {
728 udelay(4); /* DTC436 chip hangs without this */
729 /* FIXME - no timeout */
732 if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER)) {
733 printk(KERN_ERR "53C400w: no end dma signal\n");
736 while (!(NCR5380_read(TARGET_COMMAND_REG) & TCR_LAST_BYTE_SENT))
741 static int generic_NCR5380_dma_xfer_len(struct scsi_cmnd *cmd)
743 int transfersize = cmd->transfersize;
745 /* Limit transfers to 32K, for xx400 & xx406
746 * pseudoDMA that transfers in 128 bytes blocks.
748 if (transfersize > 32 * 1024 && cmd->SCp.this_residual &&
749 !(cmd->SCp.this_residual % transfersize))
750 transfersize = 32 * 1024;
752 /* 53C400 datasheet: non-modulo-128-byte transfers should use PIO */
753 if (transfersize % 128)
759 #endif /* PSEUDO_DMA */
762 * Include the NCR5380 core code that we build our driver around
767 static struct scsi_host_template driver_template = {
768 .proc_name = DRV_MODULE_NAME,
769 .name = "Generic NCR5380/NCR53C400 SCSI",
770 .detect = generic_NCR5380_detect,
771 .release = generic_NCR5380_release_resources,
772 .info = generic_NCR5380_info,
773 .queuecommand = generic_NCR5380_queue_command,
774 .eh_abort_handler = generic_NCR5380_abort,
775 .eh_bus_reset_handler = generic_NCR5380_bus_reset,
776 .bios_param = NCR5380_BIOSPARAM,
779 .sg_tablesize = SG_ALL,
781 .use_clustering = DISABLE_CLUSTERING,
782 .cmd_size = NCR5380_CMD_SIZE,
786 #include "scsi_module.c"
788 module_param(ncr_irq, int, 0);
789 module_param(ncr_dma, int, 0);
790 module_param(ncr_addr, int, 0);
791 module_param(ncr_5380, int, 0);
792 module_param(ncr_53c400, int, 0);
793 module_param(ncr_53c400a, int, 0);
794 module_param(dtc_3181e, int, 0);
795 module_param(hp_c2502, int, 0);
796 MODULE_LICENSE("GPL");
798 #if !defined(SCSI_G_NCR5380_MEM) && defined(MODULE)
799 static struct isapnp_device_id id_table[] = {
801 ISAPNP_ANY_ID, ISAPNP_ANY_ID,
802 ISAPNP_VENDOR('D', 'T', 'C'), ISAPNP_FUNCTION(0x436e),
807 MODULE_DEVICE_TABLE(isapnp, id_table);
810 __setup("ncr5380=", do_NCR5380_setup);
811 __setup("ncr53c400=", do_NCR53C400_setup);
812 __setup("ncr53c400a=", do_NCR53C400A_setup);
813 __setup("dtc3181e=", do_DTC3181E_setup);