1 // SPDX-License-Identifier: GPL-2.0-only
3 * Driver for Adaptec AHA-1542 SCSI host adapters
5 * Copyright (C) 1992 Tommy Thorn
6 * Copyright (C) 1993, 1994, 1995 Eric Youngdale
7 * Copyright (C) 2015 Ondrej Zary
10 #include <linux/module.h>
11 #include <linux/interrupt.h>
12 #include <linux/kernel.h>
13 #include <linux/types.h>
14 #include <linux/string.h>
15 #include <linux/delay.h>
16 #include <linux/init.h>
17 #include <linux/spinlock.h>
18 #include <linux/isa.h>
19 #include <linux/pnp.h>
20 #include <linux/slab.h>
23 #include <scsi/scsi_cmnd.h>
24 #include <scsi/scsi_device.h>
25 #include <scsi/scsi_host.h>
30 static bool isapnp = 1;
31 module_param(isapnp, bool, 0);
32 MODULE_PARM_DESC(isapnp, "enable PnP support (default=1)");
34 static int io[MAXBOARDS] = { 0x330, 0x334, 0, 0 };
35 module_param_hw_array(io, int, ioport, NULL, 0);
36 MODULE_PARM_DESC(io, "base IO address of controller (0x130,0x134,0x230,0x234,0x330,0x334, default=0x330,0x334)");
38 /* time AHA spends on the AT-bus during data transfer */
39 static int bus_on[MAXBOARDS] = { -1, -1, -1, -1 }; /* power-on default: 11us */
40 module_param_array(bus_on, int, NULL, 0);
41 MODULE_PARM_DESC(bus_on, "bus on time [us] (2-15, default=-1 [HW default: 11])");
43 /* time AHA spends off the bus (not to monopolize it) during data transfer */
44 static int bus_off[MAXBOARDS] = { -1, -1, -1, -1 }; /* power-on default: 4us */
45 module_param_array(bus_off, int, NULL, 0);
46 MODULE_PARM_DESC(bus_off, "bus off time [us] (1-64, default=-1 [HW default: 4])");
48 /* default is jumper selected (J1 on 1542A), factory default = 5 MB/s */
49 static int dma_speed[MAXBOARDS] = { -1, -1, -1, -1 };
50 module_param_array(dma_speed, int, NULL, 0);
51 MODULE_PARM_DESC(dma_speed, "DMA speed [MB/s] (5,6,7,8,10, default=-1 [by jumper])");
53 #define BIOS_TRANSLATION_6432 1 /* Default case these days */
54 #define BIOS_TRANSLATION_25563 2 /* Big disk case */
56 struct aha1542_hostdata {
57 /* This will effectively start both of them at the first mailbox */
58 int bios_translation; /* Mapping bios uses - for compatibility */
59 int aha1542_last_mbi_used;
60 int aha1542_last_mbo_used;
61 struct scsi_cmnd *int_cmds[AHA1542_MAILBOXES];
65 dma_addr_t ccb_handle;
68 #define AHA1542_MAX_SECTORS 16
73 dma_addr_t data_buffer_handle;
76 static inline void aha1542_intr_reset(u16 base)
78 outb(IRST, CONTROL(base));
81 static inline bool wait_mask(u16 port, u8 mask, u8 allof, u8 noneof, int timeout)
91 u8 bits = inb(port) & mask;
92 if ((bits & allof) == allof && ((bits & noneof) == 0))
103 static int aha1542_outb(unsigned int base, u8 val)
105 if (!wait_mask(STATUS(base), CDF, 0, CDF, 0))
107 outb(val, DATA(base));
112 static int aha1542_out(unsigned int base, u8 *buf, int len)
115 if (!wait_mask(STATUS(base), CDF, 0, CDF, 0))
117 outb(*buf++, DATA(base));
119 if (!wait_mask(INTRFLAGS(base), INTRMASK, HACC, 0, 0))
126 * Only used at boot time, so we do not need to worry about latency as much
130 static int aha1542_in(unsigned int base, u8 *buf, int len, int timeout)
133 if (!wait_mask(STATUS(base), DF, DF, 0, timeout))
135 *buf++ = inb(DATA(base));
140 static int makecode(unsigned hosterr, unsigned scsierr)
144 case 0xa: /* Linked command complete without error and linked normally */
145 case 0xb: /* Linked command complete without error, interrupt generated */
149 case 0x11: /* Selection time out-The initiator selection or target
150 * reselection was not complete within the SCSI Time out period
152 hosterr = DID_TIME_OUT;
155 case 0x12: /* Data overrun/underrun-The target attempted to transfer more data
156 * than was allocated by the Data Length field or the sum of the
157 * Scatter / Gather Data Length fields.
160 case 0x13: /* Unexpected bus free-The target dropped the SCSI BSY at an unexpected time. */
162 case 0x15: /* MBO command was not 00, 01 or 02-The first byte of the CB was
163 * invalid. This usually indicates a software failure.
166 case 0x16: /* Invalid CCB Operation Code-The first byte of the CCB was invalid.
167 * This usually indicates a software failure.
170 case 0x17: /* Linked CCB does not have the same LUN-A subsequent CCB of a set
171 * of linked CCB's does not specify the same logical unit number as
174 case 0x18: /* Invalid Target Direction received from Host-The direction of a
175 * Target Mode CCB was invalid.
178 case 0x19: /* Duplicate CCB Received in Target Mode-More than once CCB was
179 * received to service data transfer between the same target LUN
180 * and initiator SCSI ID in the same direction.
183 case 0x1a: /* Invalid CCB or Segment List Parameter-A segment list with a zero
184 * length segment or invalid segment list boundaries was received.
185 * A CCB parameter was invalid.
188 printk("Aha1542: %x %x\n", hosterr, scsierr);
190 hosterr = DID_ERROR; /* Couldn't find any better */
193 case 0x14: /* Target bus phase sequence failure-An invalid bus phase or bus
194 * phase sequence was requested by the target. The host adapter
195 * will generate a SCSI Reset Condition, notifying the host with
201 printk(KERN_ERR "aha1542: makecode: unknown hoststatus %x\n", hosterr);
204 return scsierr | (hosterr << 16);
207 static int aha1542_test_port(struct Scsi_Host *sh)
209 u8 inquiry_result[4];
212 /* Quick and dirty test for presence of the card. */
213 if (inb(STATUS(sh->io_port)) == 0xff)
216 /* Reset the adapter. I ought to make a hard reset, but it's not really necessary */
218 /* In case some other card was probing here, reset interrupts */
219 aha1542_intr_reset(sh->io_port); /* reset interrupts, so they don't block */
221 outb(SRST | IRST /*|SCRST */ , CONTROL(sh->io_port));
223 mdelay(20); /* Wait a little bit for things to settle down. */
225 /* Expect INIT and IDLE, any of the others are bad */
226 if (!wait_mask(STATUS(sh->io_port), STATMASK, INIT | IDLE, STST | DIAGF | INVDCMD | DF | CDF, 0))
229 /* Shouldn't have generated any interrupts during reset */
230 if (inb(INTRFLAGS(sh->io_port)) & INTRMASK)
234 * Perform a host adapter inquiry instead so we do not need to set
235 * up the mailboxes ahead of time
238 aha1542_outb(sh->io_port, CMD_INQUIRY);
240 for (i = 0; i < 4; i++) {
241 if (!wait_mask(STATUS(sh->io_port), DF, DF, 0, 0))
243 inquiry_result[i] = inb(DATA(sh->io_port));
246 /* Reading port should reset DF */
247 if (inb(STATUS(sh->io_port)) & DF)
250 /* When HACC, command is completed, and we're though testing */
251 if (!wait_mask(INTRFLAGS(sh->io_port), HACC, HACC, 0, 0))
254 /* Clear interrupts */
255 outb(IRST, CONTROL(sh->io_port));
260 static void aha1542_free_cmd(struct scsi_cmnd *cmd)
262 struct aha1542_cmd *acmd = scsi_cmd_priv(cmd);
264 if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
265 struct request *rq = scsi_cmd_to_rq(cmd);
266 void *buf = acmd->data_buffer;
267 struct req_iterator iter;
270 rq_for_each_segment(bv, rq, iter) {
271 memcpy_to_bvec(&bv, buf);
279 static irqreturn_t aha1542_interrupt(int irq, void *dev_id)
281 struct Scsi_Host *sh = dev_id;
282 struct aha1542_hostdata *aha1542 = shost_priv(sh);
283 int errstatus, mbi, mbo, mbistatus;
286 struct scsi_cmnd *tmp_cmd;
288 struct mailbox *mb = aha1542->mb;
289 struct ccb *ccb = aha1542->ccb;
293 flag = inb(INTRFLAGS(sh->io_port));
294 shost_printk(KERN_DEBUG, sh, "aha1542_intr_handle: ");
295 if (!(flag & ANYINTR))
296 printk("no interrupt?");
305 printk("status %02x\n", inb(STATUS(sh->io_port)));
310 spin_lock_irqsave(sh->host_lock, flags);
312 flag = inb(INTRFLAGS(sh->io_port));
315 * Check for unusual interrupts. If any of these happen, we should
316 * probably do something special, but for now just printing a message
317 * is sufficient. A SCSI reset detected is something that we really
318 * need to deal with in some way.
328 aha1542_intr_reset(sh->io_port);
330 mbi = aha1542->aha1542_last_mbi_used + 1;
331 if (mbi >= 2 * AHA1542_MAILBOXES)
332 mbi = AHA1542_MAILBOXES;
335 if (mb[mbi].status != 0)
338 if (mbi >= 2 * AHA1542_MAILBOXES)
339 mbi = AHA1542_MAILBOXES;
340 } while (mbi != aha1542->aha1542_last_mbi_used);
342 if (mb[mbi].status == 0) {
343 spin_unlock_irqrestore(sh->host_lock, flags);
344 /* Hmm, no mail. Must have read it the last time around */
345 if (!number_serviced)
346 shost_printk(KERN_WARNING, sh, "interrupt received, but no mail.\n");
350 mbo = (scsi2int(mb[mbi].ccbptr) - (unsigned long)aha1542->ccb_handle) / sizeof(struct ccb);
351 mbistatus = mb[mbi].status;
353 aha1542->aha1542_last_mbi_used = mbi;
356 if (ccb[mbo].tarstat | ccb[mbo].hastat)
357 shost_printk(KERN_DEBUG, sh, "aha1542_command: returning %x (status %d)\n",
358 ccb[mbo].tarstat + ((int) ccb[mbo].hastat << 16), mb[mbi].status);
362 continue; /* Aborted command not found */
365 shost_printk(KERN_DEBUG, sh, "...done %d %d\n", mbo, mbi);
368 tmp_cmd = aha1542->int_cmds[mbo];
371 spin_unlock_irqrestore(sh->host_lock, flags);
372 shost_printk(KERN_WARNING, sh, "Unexpected interrupt\n");
373 shost_printk(KERN_WARNING, sh, "tarstat=%x, hastat=%x idlun=%x ccb#=%d\n", ccb[mbo].tarstat,
374 ccb[mbo].hastat, ccb[mbo].idlun, mbo);
377 aha1542_free_cmd(tmp_cmd);
379 * Fetch the sense data, and tuck it away, in the required slot. The
380 * Adaptec automatically fetches it, and there is no guarantee that
381 * we will still have it in the cdb when we come back
383 if (ccb[mbo].tarstat == 2)
384 memcpy(tmp_cmd->sense_buffer, &ccb[mbo].cdb[ccb[mbo].cdblen],
385 SCSI_SENSE_BUFFERSIZE);
388 /* is there mail :-) */
390 /* more error checking left out here */
392 /* This is surely wrong, but I don't know what's right */
393 errstatus = makecode(ccb[mbo].hastat, ccb[mbo].tarstat);
399 shost_printk(KERN_DEBUG, sh, "(aha1542 error:%x %x %x) ", errstatus,
400 ccb[mbo].hastat, ccb[mbo].tarstat);
401 if (ccb[mbo].tarstat == 2)
402 print_hex_dump_bytes("sense: ", DUMP_PREFIX_NONE, &ccb[mbo].cdb[ccb[mbo].cdblen], 12);
404 printk("aha1542_intr_handle: returning %6x\n", errstatus);
406 tmp_cmd->result = errstatus;
407 aha1542->int_cmds[mbo] = NULL; /* This effectively frees up the mailbox slot, as
408 * far as queuecommand is concerned
415 static int aha1542_queuecommand(struct Scsi_Host *sh, struct scsi_cmnd *cmd)
417 struct aha1542_cmd *acmd = scsi_cmd_priv(cmd);
418 struct aha1542_hostdata *aha1542 = shost_priv(sh);
420 u8 target = cmd->device->id;
421 u8 lun = cmd->device->lun;
423 int bufflen = scsi_bufflen(cmd);
425 struct mailbox *mb = aha1542->mb;
426 struct ccb *ccb = aha1542->ccb;
428 if (*cmd->cmnd == REQUEST_SENSE) {
429 /* Don't do the command - we have the sense data already */
437 if (*cmd->cmnd == READ_10 || *cmd->cmnd == WRITE_10)
438 i = xscsi2int(cmd->cmnd + 2);
439 else if (*cmd->cmnd == READ_6 || *cmd->cmnd == WRITE_6)
440 i = scsi2int(cmd->cmnd + 2);
441 shost_printk(KERN_DEBUG, sh, "aha1542_queuecommand: dev %d cmd %02x pos %d len %d",
442 target, *cmd->cmnd, i, bufflen);
443 print_hex_dump_bytes("command: ", DUMP_PREFIX_NONE, cmd->cmnd, cmd->cmd_len);
447 if (cmd->sc_data_direction == DMA_TO_DEVICE) {
448 struct request *rq = scsi_cmd_to_rq(cmd);
449 void *buf = acmd->data_buffer;
450 struct req_iterator iter;
453 rq_for_each_segment(bv, rq, iter) {
454 memcpy_from_bvec(buf, &bv);
460 * Use the outgoing mailboxes in a round-robin fashion, because this
461 * is how the host adapter will scan for them
464 spin_lock_irqsave(sh->host_lock, flags);
465 mbo = aha1542->aha1542_last_mbo_used + 1;
466 if (mbo >= AHA1542_MAILBOXES)
470 if (mb[mbo].status == 0 && aha1542->int_cmds[mbo] == NULL)
473 if (mbo >= AHA1542_MAILBOXES)
475 } while (mbo != aha1542->aha1542_last_mbo_used);
477 if (mb[mbo].status || aha1542->int_cmds[mbo])
478 panic("Unable to find empty mailbox for aha1542.\n");
480 aha1542->int_cmds[mbo] = cmd; /* This will effectively prevent someone else from
481 * screwing with this cdb.
484 aha1542->aha1542_last_mbo_used = mbo;
487 shost_printk(KERN_DEBUG, sh, "Sending command (%d)...", mbo);
490 /* This gets trashed for some reason */
491 any2scsi(mb[mbo].ccbptr, aha1542->ccb_handle + mbo * sizeof(*ccb));
493 memset(&ccb[mbo], 0, sizeof(struct ccb));
495 ccb[mbo].cdblen = cmd->cmd_len;
498 if (*cmd->cmnd == READ_10 || *cmd->cmnd == READ_6)
500 else if (*cmd->cmnd == WRITE_10 || *cmd->cmnd == WRITE_6)
503 memcpy(ccb[mbo].cdb, cmd->cmnd, ccb[mbo].cdblen);
504 ccb[mbo].op = 0; /* SCSI Initiator Command */
505 any2scsi(ccb[mbo].datalen, bufflen);
507 any2scsi(ccb[mbo].dataptr, acmd->data_buffer_handle);
509 any2scsi(ccb[mbo].dataptr, 0);
510 ccb[mbo].idlun = (target & 7) << 5 | direction | (lun & 7); /*SCSI Target Id */
511 ccb[mbo].rsalen = 16;
512 ccb[mbo].linkptr[0] = ccb[mbo].linkptr[1] = ccb[mbo].linkptr[2] = 0;
513 ccb[mbo].commlinkid = 0;
516 print_hex_dump_bytes("sending: ", DUMP_PREFIX_NONE, &ccb[mbo], sizeof(ccb[mbo]) - 10);
517 printk("aha1542_queuecommand: now waiting for interrupt ");
520 aha1542_outb(cmd->device->host->io_port, CMD_START_SCSI);
521 spin_unlock_irqrestore(sh->host_lock, flags);
526 /* Initialize mailboxes */
527 static void setup_mailboxes(struct Scsi_Host *sh)
529 struct aha1542_hostdata *aha1542 = shost_priv(sh);
530 u8 mb_cmd[5] = { CMD_MBINIT, AHA1542_MAILBOXES, 0, 0, 0};
533 for (i = 0; i < AHA1542_MAILBOXES; i++) {
534 aha1542->mb[i].status = 0;
535 any2scsi(aha1542->mb[i].ccbptr,
536 aha1542->ccb_handle + i * sizeof(struct ccb));
537 aha1542->mb[AHA1542_MAILBOXES + i].status = 0;
539 aha1542_intr_reset(sh->io_port); /* reset interrupts, so they don't block */
540 any2scsi(mb_cmd + 2, aha1542->mb_handle);
541 if (aha1542_out(sh->io_port, mb_cmd, 5))
542 shost_printk(KERN_ERR, sh, "failed setting up mailboxes\n");
543 aha1542_intr_reset(sh->io_port);
546 static int aha1542_getconfig(struct Scsi_Host *sh)
548 u8 inquiry_result[3];
550 i = inb(STATUS(sh->io_port));
552 i = inb(DATA(sh->io_port));
554 aha1542_outb(sh->io_port, CMD_RETCONF);
555 aha1542_in(sh->io_port, inquiry_result, 3, 0);
556 if (!wait_mask(INTRFLAGS(sh->io_port), INTRMASK, HACC, 0, 0))
557 shost_printk(KERN_ERR, sh, "error querying board settings\n");
558 aha1542_intr_reset(sh->io_port);
559 switch (inquiry_result[0]) {
574 * This means that the adapter, although Adaptec 1542 compatible, doesn't use a DMA channel.
575 * Currently only aware of the BusLogic BT-445S VL-Bus adapter which needs this.
577 sh->dma_channel = 0xFF;
580 shost_printk(KERN_ERR, sh, "Unable to determine DMA channel.\n");
583 switch (inquiry_result[1]) {
603 shost_printk(KERN_ERR, sh, "Unable to determine IRQ level.\n");
606 sh->this_id = inquiry_result[2] & 7;
611 * This function should only be called for 1542C boards - we can detect
612 * the special firmware settings and unlock the board
615 static int aha1542_mbenable(struct Scsi_Host *sh)
617 static u8 mbenable_cmd[3];
618 static u8 mbenable_result[2];
621 retval = BIOS_TRANSLATION_6432;
623 aha1542_outb(sh->io_port, CMD_EXTBIOS);
624 if (aha1542_in(sh->io_port, mbenable_result, 2, 100))
626 if (!wait_mask(INTRFLAGS(sh->io_port), INTRMASK, HACC, 0, 100))
628 aha1542_intr_reset(sh->io_port);
630 if ((mbenable_result[0] & 0x08) || mbenable_result[1]) {
631 mbenable_cmd[0] = CMD_MBENABLE;
633 mbenable_cmd[2] = mbenable_result[1];
635 if ((mbenable_result[0] & 0x08) && (mbenable_result[1] & 0x03))
636 retval = BIOS_TRANSLATION_25563;
638 if (aha1542_out(sh->io_port, mbenable_cmd, 3))
643 shost_printk(KERN_ERR, sh, "Mailbox init failed\n");
645 aha1542_intr_reset(sh->io_port);
649 /* Query the board to find out if it is a 1542 or a 1740, or whatever. */
650 static int aha1542_query(struct Scsi_Host *sh)
652 struct aha1542_hostdata *aha1542 = shost_priv(sh);
653 u8 inquiry_result[4];
655 i = inb(STATUS(sh->io_port));
657 i = inb(DATA(sh->io_port));
659 aha1542_outb(sh->io_port, CMD_INQUIRY);
660 aha1542_in(sh->io_port, inquiry_result, 4, 0);
661 if (!wait_mask(INTRFLAGS(sh->io_port), INTRMASK, HACC, 0, 0))
662 shost_printk(KERN_ERR, sh, "error querying card type\n");
663 aha1542_intr_reset(sh->io_port);
665 aha1542->bios_translation = BIOS_TRANSLATION_6432; /* Default case */
668 * For an AHA1740 series board, we ignore the board since there is a
669 * hardware bug which can lead to wrong blocks being returned if the board
670 * is operating in the 1542 emulation mode. Since there is an extended mode
671 * driver, we simply ignore the board and let the 1740 driver pick it up.
674 if (inquiry_result[0] == 0x43) {
675 shost_printk(KERN_INFO, sh, "Emulation mode not supported for AHA-1740 hardware, use aha1740 driver instead.\n");
680 * Always call this - boards that do not support extended bios translation
681 * will ignore the command, and we will set the proper default
684 aha1542->bios_translation = aha1542_mbenable(sh);
689 static u8 dma_speed_hw(int dma_speed)
704 return 0xff; /* invalid */
707 /* Set the Bus on/off-times as not to ruin floppy performance */
708 static void aha1542_set_bus_times(struct Scsi_Host *sh, int bus_on, int bus_off, int dma_speed)
711 u8 oncmd[] = { CMD_BUSON_TIME, clamp(bus_on, 2, 15) };
713 aha1542_intr_reset(sh->io_port);
714 if (aha1542_out(sh->io_port, oncmd, 2))
719 u8 offcmd[] = { CMD_BUSOFF_TIME, clamp(bus_off, 1, 64) };
721 aha1542_intr_reset(sh->io_port);
722 if (aha1542_out(sh->io_port, offcmd, 2))
726 if (dma_speed_hw(dma_speed) != 0xff) {
727 u8 dmacmd[] = { CMD_DMASPEED, dma_speed_hw(dma_speed) };
729 aha1542_intr_reset(sh->io_port);
730 if (aha1542_out(sh->io_port, dmacmd, 2))
733 aha1542_intr_reset(sh->io_port);
736 shost_printk(KERN_ERR, sh, "setting bus on/off-time failed\n");
737 aha1542_intr_reset(sh->io_port);
740 /* return non-zero on detection */
741 static struct Scsi_Host *aha1542_hw_init(struct scsi_host_template *tpnt, struct device *pdev, int indx)
743 unsigned int base_io = io[indx];
744 struct Scsi_Host *sh;
745 struct aha1542_hostdata *aha1542;
746 char dma_info[] = "no DMA";
751 if (!request_region(base_io, AHA1542_REGION_SIZE, "aha1542"))
754 sh = scsi_host_alloc(tpnt, sizeof(struct aha1542_hostdata));
757 aha1542 = shost_priv(sh);
759 sh->unique_id = base_io;
760 sh->io_port = base_io;
761 sh->n_io_port = AHA1542_REGION_SIZE;
762 aha1542->aha1542_last_mbi_used = 2 * AHA1542_MAILBOXES - 1;
763 aha1542->aha1542_last_mbo_used = AHA1542_MAILBOXES - 1;
765 if (!aha1542_test_port(sh))
768 aha1542_set_bus_times(sh, bus_on[indx], bus_off[indx], dma_speed[indx]);
769 if (aha1542_query(sh))
771 if (aha1542_getconfig(sh) == -1)
774 if (sh->dma_channel != 0xFF)
775 snprintf(dma_info, sizeof(dma_info), "DMA %d", sh->dma_channel);
776 shost_printk(KERN_INFO, sh, "Adaptec AHA-1542 (SCSI-ID %d) at IO 0x%x, IRQ %d, %s\n",
777 sh->this_id, base_io, sh->irq, dma_info);
778 if (aha1542->bios_translation == BIOS_TRANSLATION_25563)
779 shost_printk(KERN_INFO, sh, "Using extended bios translation\n");
781 if (dma_set_mask_and_coherent(pdev, DMA_BIT_MASK(24)) < 0)
784 aha1542->mb = dma_alloc_coherent(pdev,
785 AHA1542_MAILBOXES * 2 * sizeof(struct mailbox),
786 &aha1542->mb_handle, GFP_KERNEL);
790 aha1542->ccb = dma_alloc_coherent(pdev,
791 AHA1542_MAILBOXES * sizeof(struct ccb),
792 &aha1542->ccb_handle, GFP_KERNEL);
798 if (request_irq(sh->irq, aha1542_interrupt, 0, "aha1542", sh)) {
799 shost_printk(KERN_ERR, sh, "Unable to allocate IRQ.\n");
802 if (sh->dma_channel != 0xFF) {
803 if (request_dma(sh->dma_channel, "aha1542")) {
804 shost_printk(KERN_ERR, sh, "Unable to allocate DMA channel.\n");
807 if (sh->dma_channel == 0 || sh->dma_channel >= 5) {
808 set_dma_mode(sh->dma_channel, DMA_MODE_CASCADE);
809 enable_dma(sh->dma_channel);
813 if (scsi_add_host(sh, pdev))
821 if (sh->dma_channel != 0xff)
822 free_dma(sh->dma_channel);
824 free_irq(sh->irq, sh);
826 dma_free_coherent(pdev, AHA1542_MAILBOXES * sizeof(struct ccb),
827 aha1542->ccb, aha1542->ccb_handle);
829 dma_free_coherent(pdev, AHA1542_MAILBOXES * 2 * sizeof(struct mailbox),
830 aha1542->mb, aha1542->mb_handle);
834 release_region(base_io, AHA1542_REGION_SIZE);
839 static int aha1542_release(struct Scsi_Host *sh)
841 struct aha1542_hostdata *aha1542 = shost_priv(sh);
842 struct device *dev = sh->dma_dev;
844 scsi_remove_host(sh);
845 if (sh->dma_channel != 0xff)
846 free_dma(sh->dma_channel);
847 dma_free_coherent(dev, AHA1542_MAILBOXES * sizeof(struct ccb),
848 aha1542->ccb, aha1542->ccb_handle);
849 dma_free_coherent(dev, AHA1542_MAILBOXES * 2 * sizeof(struct mailbox),
850 aha1542->mb, aha1542->mb_handle);
852 free_irq(sh->irq, sh);
853 if (sh->io_port && sh->n_io_port)
854 release_region(sh->io_port, sh->n_io_port);
861 * This is a device reset. This is handled by sending a special command
864 static int aha1542_dev_reset(struct scsi_cmnd *cmd)
866 struct Scsi_Host *sh = cmd->device->host;
867 struct aha1542_hostdata *aha1542 = shost_priv(sh);
869 struct mailbox *mb = aha1542->mb;
870 u8 target = cmd->device->id;
871 u8 lun = cmd->device->lun;
873 struct ccb *ccb = aha1542->ccb;
875 spin_lock_irqsave(sh->host_lock, flags);
876 mbo = aha1542->aha1542_last_mbo_used + 1;
877 if (mbo >= AHA1542_MAILBOXES)
881 if (mb[mbo].status == 0 && aha1542->int_cmds[mbo] == NULL)
884 if (mbo >= AHA1542_MAILBOXES)
886 } while (mbo != aha1542->aha1542_last_mbo_used);
888 if (mb[mbo].status || aha1542->int_cmds[mbo])
889 panic("Unable to find empty mailbox for aha1542.\n");
891 aha1542->int_cmds[mbo] = cmd; /* This will effectively
892 * prevent someone else from
893 * screwing with this cdb.
896 aha1542->aha1542_last_mbo_used = mbo;
898 /* This gets trashed for some reason */
899 any2scsi(mb[mbo].ccbptr, aha1542->ccb_handle + mbo * sizeof(*ccb));
901 memset(&ccb[mbo], 0, sizeof(struct ccb));
903 ccb[mbo].op = 0x81; /* BUS DEVICE RESET */
905 ccb[mbo].idlun = (target & 7) << 5 | (lun & 7); /*SCSI Target Id */
907 ccb[mbo].linkptr[0] = ccb[mbo].linkptr[1] = ccb[mbo].linkptr[2] = 0;
908 ccb[mbo].commlinkid = 0;
911 * Now tell the 1542 to flush all pending commands for this
914 aha1542_outb(sh->io_port, CMD_START_SCSI);
915 spin_unlock_irqrestore(sh->host_lock, flags);
917 scmd_printk(KERN_WARNING, cmd,
918 "Trying device reset for target\n");
923 static int aha1542_reset(struct scsi_cmnd *cmd, u8 reset_cmd)
925 struct Scsi_Host *sh = cmd->device->host;
926 struct aha1542_hostdata *aha1542 = shost_priv(sh);
930 spin_lock_irqsave(sh->host_lock, flags);
932 * This does a scsi reset for all devices on the bus.
933 * In principle, we could also reset the 1542 - should
934 * we do this? Try this first, and we can add that later
935 * if it turns out to be useful.
937 outb(reset_cmd, CONTROL(cmd->device->host->io_port));
939 if (!wait_mask(STATUS(cmd->device->host->io_port),
940 STATMASK, IDLE, STST | DIAGF | INVDCMD | DF | CDF, 0)) {
941 spin_unlock_irqrestore(sh->host_lock, flags);
946 * We need to do this too before the 1542 can interact with
947 * us again after host reset.
949 if (reset_cmd & HRST)
950 setup_mailboxes(cmd->device->host);
953 * Now try to pick up the pieces. For all pending commands,
954 * free any internal data structures, and basically clear things
955 * out. We do not try and restart any commands or anything -
956 * the strategy handler takes care of that crap.
958 shost_printk(KERN_WARNING, cmd->device->host, "Sent BUS RESET to scsi host %d\n", cmd->device->host->host_no);
960 for (i = 0; i < AHA1542_MAILBOXES; i++) {
961 if (aha1542->int_cmds[i] != NULL) {
962 struct scsi_cmnd *tmp_cmd;
963 tmp_cmd = aha1542->int_cmds[i];
965 if (tmp_cmd->device->soft_reset) {
967 * If this device implements the soft reset option,
968 * then it is still holding onto the command, and
969 * may yet complete it. In this case, we don't
974 aha1542_free_cmd(tmp_cmd);
975 aha1542->int_cmds[i] = NULL;
976 aha1542->mb[i].status = 0;
980 spin_unlock_irqrestore(sh->host_lock, flags);
984 static int aha1542_bus_reset(struct scsi_cmnd *cmd)
986 return aha1542_reset(cmd, SCRST);
989 static int aha1542_host_reset(struct scsi_cmnd *cmd)
991 return aha1542_reset(cmd, HRST | SCRST);
994 static int aha1542_biosparam(struct scsi_device *sdev,
995 struct block_device *bdev, sector_t capacity, int geom[])
997 struct aha1542_hostdata *aha1542 = shost_priv(sdev->host);
999 if (capacity >= 0x200000 &&
1000 aha1542->bios_translation == BIOS_TRANSLATION_25563) {
1001 /* Please verify that this is the same as what DOS returns */
1002 geom[0] = 255; /* heads */
1003 geom[1] = 63; /* sectors */
1005 geom[0] = 64; /* heads */
1006 geom[1] = 32; /* sectors */
1008 geom[2] = sector_div(capacity, geom[0] * geom[1]); /* cylinders */
1012 MODULE_LICENSE("GPL");
1014 static int aha1542_init_cmd_priv(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
1016 struct aha1542_cmd *acmd = scsi_cmd_priv(cmd);
1018 acmd->data_buffer = dma_alloc_coherent(shost->dma_dev,
1019 SECTOR_SIZE * AHA1542_MAX_SECTORS,
1020 &acmd->data_buffer_handle, GFP_KERNEL);
1021 if (!acmd->data_buffer)
1026 static int aha1542_exit_cmd_priv(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
1028 struct aha1542_cmd *acmd = scsi_cmd_priv(cmd);
1030 dma_free_coherent(shost->dma_dev, SECTOR_SIZE * AHA1542_MAX_SECTORS,
1031 acmd->data_buffer, acmd->data_buffer_handle);
1035 static struct scsi_host_template driver_template = {
1036 .module = THIS_MODULE,
1037 .proc_name = "aha1542",
1038 .name = "Adaptec 1542",
1039 .cmd_size = sizeof(struct aha1542_cmd),
1040 .queuecommand = aha1542_queuecommand,
1041 .eh_device_reset_handler= aha1542_dev_reset,
1042 .eh_bus_reset_handler = aha1542_bus_reset,
1043 .eh_host_reset_handler = aha1542_host_reset,
1044 .bios_param = aha1542_biosparam,
1045 .init_cmd_priv = aha1542_init_cmd_priv,
1046 .exit_cmd_priv = aha1542_exit_cmd_priv,
1047 .can_queue = AHA1542_MAILBOXES,
1049 .max_sectors = AHA1542_MAX_SECTORS,
1050 .sg_tablesize = SG_ALL,
1053 static int aha1542_isa_match(struct device *pdev, unsigned int ndev)
1055 struct Scsi_Host *sh = aha1542_hw_init(&driver_template, pdev, ndev);
1060 dev_set_drvdata(pdev, sh);
1064 static void aha1542_isa_remove(struct device *pdev,
1067 aha1542_release(dev_get_drvdata(pdev));
1068 dev_set_drvdata(pdev, NULL);
1071 static struct isa_driver aha1542_isa_driver = {
1072 .match = aha1542_isa_match,
1073 .remove = aha1542_isa_remove,
1078 static int isa_registered;
1081 static const struct pnp_device_id aha1542_pnp_ids[] = {
1082 { .id = "ADP1542" },
1085 MODULE_DEVICE_TABLE(pnp, aha1542_pnp_ids);
1087 static int aha1542_pnp_probe(struct pnp_dev *pdev, const struct pnp_device_id *id)
1090 struct Scsi_Host *sh;
1092 for (indx = 0; indx < ARRAY_SIZE(io); indx++) {
1096 if (pnp_activate_dev(pdev) < 0)
1099 io[indx] = pnp_port_start(pdev, 0);
1102 * The card can be queried for its DMA, we have
1103 * the DMA set up that is enough
1106 dev_info(&pdev->dev, "ISAPnP found an AHA1535 at I/O 0x%03X", io[indx]);
1109 sh = aha1542_hw_init(&driver_template, &pdev->dev, indx);
1113 pnp_set_drvdata(pdev, sh);
1117 static void aha1542_pnp_remove(struct pnp_dev *pdev)
1119 aha1542_release(pnp_get_drvdata(pdev));
1120 pnp_set_drvdata(pdev, NULL);
1123 static struct pnp_driver aha1542_pnp_driver = {
1125 .id_table = aha1542_pnp_ids,
1126 .probe = aha1542_pnp_probe,
1127 .remove = aha1542_pnp_remove,
1129 static int pnp_registered;
1130 #endif /* CONFIG_PNP */
1132 static int __init aha1542_init(void)
1138 ret = pnp_register_driver(&aha1542_pnp_driver);
1143 ret = isa_register_driver(&aha1542_isa_driver, MAXBOARDS);
1157 static void __exit aha1542_exit(void)
1161 pnp_unregister_driver(&aha1542_pnp_driver);
1164 isa_unregister_driver(&aha1542_isa_driver);
1167 module_init(aha1542_init);
1168 module_exit(aha1542_exit);