--- /dev/null
+/*
+ * Driver for Adaptec AHA-1542 SCSI host adapters
+ *
+ * Copyright (C) 1992 Tommy Thorn
+ * Copyright (C) 1993, 1994, 1995 Eric Youngdale
+ * Copyright (C) 2015 Ondrej Zary
+ */
+
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/spinlock.h>
+#include <linux/isa.h>
+#include <linux/pnp.h>
+#include <linux/slab.h>
+#include <linux/io.h>
+#include <asm/dma.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_host.h>
+#include "aha1542.h"
+
+#define MAXBOARDS 4
+
+static bool isapnp = 1;
+module_param(isapnp, bool, 0);
+MODULE_PARM_DESC(isapnp, "enable PnP support (default=1)");
+
+static int io[MAXBOARDS] = { 0x330, 0x334, 0, 0 };
+module_param_array(io, int, NULL, 0);
+MODULE_PARM_DESC(io, "base IO address of controller (0x130,0x134,0x230,0x234,0x330,0x334, default=0x330,0x334)");
+
+/* time AHA spends on the AT-bus during data transfer */
+static int bus_on[MAXBOARDS] = { -1, -1, -1, -1 }; /* power-on default: 11us */
+module_param_array(bus_on, int, NULL, 0);
+MODULE_PARM_DESC(bus_on, "bus on time [us] (2-15, default=-1 [HW default: 11])");
+
+/* time AHA spends off the bus (not to monopolize it) during data transfer */
+static int bus_off[MAXBOARDS] = { -1, -1, -1, -1 }; /* power-on default: 4us */
+module_param_array(bus_off, int, NULL, 0);
+MODULE_PARM_DESC(bus_off, "bus off time [us] (1-64, default=-1 [HW default: 4])");
+
+/* default is jumper selected (J1 on 1542A), factory default = 5 MB/s */
+static int dma_speed[MAXBOARDS] = { -1, -1, -1, -1 };
+module_param_array(dma_speed, int, NULL, 0);
+MODULE_PARM_DESC(dma_speed, "DMA speed [MB/s] (5,6,7,8,10, default=-1 [by jumper])");
+
+#define BIOS_TRANSLATION_6432 1 /* Default case these days */
+#define BIOS_TRANSLATION_25563 2 /* Big disk case */
+
+struct aha1542_hostdata {
+ /* This will effectively start both of them at the first mailbox */
+ int bios_translation; /* Mapping bios uses - for compatibility */
+ int aha1542_last_mbi_used;
+ int aha1542_last_mbo_used;
+ struct scsi_cmnd *int_cmds[AHA1542_MAILBOXES];
+ struct mailbox mb[2 * AHA1542_MAILBOXES];
+ struct ccb ccb[AHA1542_MAILBOXES];
+};
+
+static inline void aha1542_intr_reset(u16 base)
+{
+ outb(IRST, CONTROL(base));
+}
+
+static inline bool wait_mask(u16 port, u8 mask, u8 allof, u8 noneof, int timeout)
+{
+ bool delayed = true;
+
+ if (timeout == 0) {
+ timeout = 3000000;
+ delayed = false;
+ }
+
+ while (1) {
+ u8 bits = inb(port) & mask;
+ if ((bits & allof) == allof && ((bits & noneof) == 0))
+ break;
+ if (delayed)
+ mdelay(1);
+ if (--timeout == 0)
+ return false;
+ }
+
+ return true;
+}
+
+static int aha1542_outb(unsigned int base, u8 val)
+{
+ if (!wait_mask(STATUS(base), CDF, 0, CDF, 0))
+ return 1;
+ outb(val, DATA(base));
+
+ return 0;
+}
+
+static int aha1542_out(unsigned int base, u8 *buf, int len)
+{
+ while (len--) {
+ if (!wait_mask(STATUS(base), CDF, 0, CDF, 0))
+ return 1;
+ outb(*buf++, DATA(base));
+ }
+ if (!wait_mask(INTRFLAGS(base), INTRMASK, HACC, 0, 0))
+ return 1;
+
+ return 0;
+}
+
+/* Only used at boot time, so we do not need to worry about latency as much
+ here */
+
+static int aha1542_in(unsigned int base, u8 *buf, int len, int timeout)
+{
+ while (len--) {
+ if (!wait_mask(STATUS(base), DF, DF, 0, timeout))
+ return 1;
+ *buf++ = inb(DATA(base));
+ }
+ return 0;
+}
+
+static int makecode(unsigned hosterr, unsigned scsierr)
+{
+ switch (hosterr) {
+ case 0x0:
+ case 0xa: /* Linked command complete without error and linked normally */
+ case 0xb: /* Linked command complete without error, interrupt generated */
+ hosterr = 0;
+ break;
+
+ case 0x11: /* Selection time out-The initiator selection or target
+ reselection was not complete within the SCSI Time out period */
+ hosterr = DID_TIME_OUT;
+ break;
+
+ case 0x12: /* Data overrun/underrun-The target attempted to transfer more data
+ than was allocated by the Data Length field or the sum of the
+ Scatter / Gather Data Length fields. */
+
+ case 0x13: /* Unexpected bus free-The target dropped the SCSI BSY at an unexpected time. */
+
+ case 0x15: /* MBO command was not 00, 01 or 02-The first byte of the CB was
+ invalid. This usually indicates a software failure. */
+
+ case 0x16: /* Invalid CCB Operation Code-The first byte of the CCB was invalid.
+ This usually indicates a software failure. */
+
+ case 0x17: /* Linked CCB does not have the same LUN-A subsequent CCB of a set
+ of linked CCB's does not specify the same logical unit number as
+ the first. */
+ case 0x18: /* Invalid Target Direction received from Host-The direction of a
+ Target Mode CCB was invalid. */
+
+ case 0x19: /* Duplicate CCB Received in Target Mode-More than once CCB was
+ received to service data transfer between the same target LUN
+ and initiator SCSI ID in the same direction. */
+
+ case 0x1a: /* Invalid CCB or Segment List Parameter-A segment list with a zero
+ length segment or invalid segment list boundaries was received.
+ A CCB parameter was invalid. */
+#ifdef DEBUG
+ printk("Aha1542: %x %x\n", hosterr, scsierr);
+#endif
+ hosterr = DID_ERROR; /* Couldn't find any better */
+ break;
+
+ case 0x14: /* Target bus phase sequence failure-An invalid bus phase or bus
+ phase sequence was requested by the target. The host adapter
+ will generate a SCSI Reset Condition, notifying the host with
+ a SCRD interrupt */
+ hosterr = DID_RESET;
+ break;
+ default:
+ printk(KERN_ERR "aha1542: makecode: unknown hoststatus %x\n", hosterr);
+ break;
+ }
+ return scsierr | (hosterr << 16);
+}
+
+static int aha1542_test_port(struct Scsi_Host *sh)
+{
+ u8 inquiry_result[4];
+ int i;
+
+ /* Quick and dirty test for presence of the card. */
+ if (inb(STATUS(sh->io_port)) == 0xff)
+ return 0;
+
+ /* Reset the adapter. I ought to make a hard reset, but it's not really necessary */
+
+ /* In case some other card was probing here, reset interrupts */
+ aha1542_intr_reset(sh->io_port); /* reset interrupts, so they don't block */
+
+ outb(SRST | IRST /*|SCRST */ , CONTROL(sh->io_port));
+
+ mdelay(20); /* Wait a little bit for things to settle down. */
+
+ /* Expect INIT and IDLE, any of the others are bad */
+ if (!wait_mask(STATUS(sh->io_port), STATMASK, INIT | IDLE, STST | DIAGF | INVDCMD | DF | CDF, 0))
+ return 0;
+
+ /* Shouldn't have generated any interrupts during reset */
+ if (inb(INTRFLAGS(sh->io_port)) & INTRMASK)
+ return 0;
+
+ /* Perform a host adapter inquiry instead so we do not need to set
+ up the mailboxes ahead of time */
+
+ aha1542_outb(sh->io_port, CMD_INQUIRY);
+
+ for (i = 0; i < 4; i++) {
+ if (!wait_mask(STATUS(sh->io_port), DF, DF, 0, 0))
+ return 0;
+ inquiry_result[i] = inb(DATA(sh->io_port));
+ }
+
+ /* Reading port should reset DF */
+ if (inb(STATUS(sh->io_port)) & DF)
+ return 0;
+
+ /* When HACC, command is completed, and we're though testing */
+ if (!wait_mask(INTRFLAGS(sh->io_port), HACC, HACC, 0, 0))
+ return 0;
+
+ /* Clear interrupts */
+ outb(IRST, CONTROL(sh->io_port));
+
+ return 1;
+}
+
+static irqreturn_t aha1542_interrupt(int irq, void *dev_id)
+{
+ struct Scsi_Host *sh = dev_id;
+ struct aha1542_hostdata *aha1542 = shost_priv(sh);
+ void (*my_done)(struct scsi_cmnd *) = NULL;
+ int errstatus, mbi, mbo, mbistatus;
+ int number_serviced;
+ unsigned long flags;
+ struct scsi_cmnd *tmp_cmd;
+ int flag;
+ struct mailbox *mb = aha1542->mb;
+ struct ccb *ccb = aha1542->ccb;
+
+#ifdef DEBUG
+ {
+ flag = inb(INTRFLAGS(sh->io_port));
+ shost_printk(KERN_DEBUG, sh, "aha1542_intr_handle: ");
+ if (!(flag & ANYINTR))
+ printk("no interrupt?");
+ if (flag & MBIF)
+ printk("MBIF ");
+ if (flag & MBOA)
+ printk("MBOF ");
+ if (flag & HACC)
+ printk("HACC ");
+ if (flag & SCRD)
+ printk("SCRD ");
+ printk("status %02x\n", inb(STATUS(sh->io_port)));
+ };
+#endif
+ number_serviced = 0;
+
+ spin_lock_irqsave(sh->host_lock, flags);
+ while (1) {
+ flag = inb(INTRFLAGS(sh->io_port));
+
+ /* Check for unusual interrupts. If any of these happen, we should
+ probably do something special, but for now just printing a message
+ is sufficient. A SCSI reset detected is something that we really
+ need to deal with in some way. */
+ if (flag & ~MBIF) {
+ if (flag & MBOA)
+ printk("MBOF ");
+ if (flag & HACC)
+ printk("HACC ");
+ if (flag & SCRD)
+ printk("SCRD ");
+ }
+ aha1542_intr_reset(sh->io_port);
+
+ mbi = aha1542->aha1542_last_mbi_used + 1;
+ if (mbi >= 2 * AHA1542_MAILBOXES)
+ mbi = AHA1542_MAILBOXES;
+
+ do {
+ if (mb[mbi].status != 0)
+ break;
+ mbi++;
+ if (mbi >= 2 * AHA1542_MAILBOXES)
+ mbi = AHA1542_MAILBOXES;
+ } while (mbi != aha1542->aha1542_last_mbi_used);
+
+ if (mb[mbi].status == 0) {
+ spin_unlock_irqrestore(sh->host_lock, flags);
+ /* Hmm, no mail. Must have read it the last time around */
+ if (!number_serviced)
+ shost_printk(KERN_WARNING, sh, "interrupt received, but no mail.\n");
+ return IRQ_HANDLED;
+ };
+
+ mbo = (scsi2int(mb[mbi].ccbptr) - (isa_virt_to_bus(&ccb[0]))) / sizeof(struct ccb);
+ mbistatus = mb[mbi].status;
+ mb[mbi].status = 0;
+ aha1542->aha1542_last_mbi_used = mbi;
+
+#ifdef DEBUG
+ if (ccb[mbo].tarstat | ccb[mbo].hastat)
+ shost_printk(KERN_DEBUG, sh, "aha1542_command: returning %x (status %d)\n",
+ ccb[mbo].tarstat + ((int) ccb[mbo].hastat << 16), mb[mbi].status);
+#endif
+
+ if (mbistatus == 3)
+ continue; /* Aborted command not found */
+
+#ifdef DEBUG
+ shost_printk(KERN_DEBUG, sh, "...done %d %d\n", mbo, mbi);
+#endif
+
+ tmp_cmd = aha1542->int_cmds[mbo];
+
+ if (!tmp_cmd || !tmp_cmd->scsi_done) {
+ spin_unlock_irqrestore(sh->host_lock, flags);
+ shost_printk(KERN_WARNING, sh, "Unexpected interrupt\n");
+ shost_printk(KERN_WARNING, sh, "tarstat=%x, hastat=%x idlun=%x ccb#=%d\n", ccb[mbo].tarstat,
+ ccb[mbo].hastat, ccb[mbo].idlun, mbo);
+ return IRQ_HANDLED;
+ }
+ my_done = tmp_cmd->scsi_done;
+ kfree(tmp_cmd->host_scribble);
+ tmp_cmd->host_scribble = NULL;
+ /* Fetch the sense data, and tuck it away, in the required slot. The
+ Adaptec automatically fetches it, and there is no guarantee that
+ we will still have it in the cdb when we come back */
+ if (ccb[mbo].tarstat == 2)
+ memcpy(tmp_cmd->sense_buffer, &ccb[mbo].cdb[ccb[mbo].cdblen],
+ SCSI_SENSE_BUFFERSIZE);
+
+
+ /* is there mail :-) */
+
+ /* more error checking left out here */
+ if (mbistatus != 1)
+ /* This is surely wrong, but I don't know what's right */
+ errstatus = makecode(ccb[mbo].hastat, ccb[mbo].tarstat);
+ else
+ errstatus = 0;
+
+#ifdef DEBUG
+ if (errstatus)
+ shost_printk(KERN_DEBUG, sh, "(aha1542 error:%x %x %x) ", errstatus,
+ ccb[mbo].hastat, ccb[mbo].tarstat);
+ if (ccb[mbo].tarstat == 2)
+ print_hex_dump_bytes("sense: ", DUMP_PREFIX_NONE, &ccb[mbo].cdb[ccb[mbo].cdblen], 12);
+ if (errstatus)
+ printk("aha1542_intr_handle: returning %6x\n", errstatus);
+#endif
+ tmp_cmd->result = errstatus;
+ aha1542->int_cmds[mbo] = NULL; /* This effectively frees up the mailbox slot, as
+ far as queuecommand is concerned */
+ my_done(tmp_cmd);
+ number_serviced++;
+ };
+}
+
+static int aha1542_queuecommand(struct Scsi_Host *sh, struct scsi_cmnd *cmd)
+{
+ struct aha1542_hostdata *aha1542 = shost_priv(sh);
+ u8 direction;
+ u8 target = cmd->device->id;
+ u8 lun = cmd->device->lun;
+ unsigned long flags;
+ int bufflen = scsi_bufflen(cmd);
+ int mbo, sg_count;
+ struct mailbox *mb = aha1542->mb;
+ struct ccb *ccb = aha1542->ccb;
+ struct chain *cptr;
+
+ if (*cmd->cmnd == REQUEST_SENSE) {
+ /* Don't do the command - we have the sense data already */
+ cmd->result = 0;
+ cmd->scsi_done(cmd);
+ return 0;
+ }
+#ifdef DEBUG
+ {
+ int i = -1;
+ if (*cmd->cmnd == READ_10 || *cmd->cmnd == WRITE_10)
+ i = xscsi2int(cmd->cmnd + 2);
+ else if (*cmd->cmnd == READ_6 || *cmd->cmnd == WRITE_6)
+ i = scsi2int(cmd->cmnd + 2);
+ shost_printk(KERN_DEBUG, sh, "aha1542_queuecommand: dev %d cmd %02x pos %d len %d",
+ target, *cmd->cmnd, i, bufflen);
+ print_hex_dump_bytes("command: ", DUMP_PREFIX_NONE, cmd->cmnd, cmd->cmd_len);
+ }
+#endif
+ if (bufflen) { /* allocate memory before taking host_lock */
+ sg_count = scsi_sg_count(cmd);
+ cptr = kmalloc(sizeof(*cptr) * sg_count, GFP_KERNEL | GFP_DMA);
+ if (!cptr)
+ return SCSI_MLQUEUE_HOST_BUSY;
+ }
+
+ /* Use the outgoing mailboxes in a round-robin fashion, because this
+ is how the host adapter will scan for them */
+
+ spin_lock_irqsave(sh->host_lock, flags);
+ mbo = aha1542->aha1542_last_mbo_used + 1;
+ if (mbo >= AHA1542_MAILBOXES)
+ mbo = 0;
+
+ do {
+ if (mb[mbo].status == 0 && aha1542->int_cmds[mbo] == NULL)
+ break;
+ mbo++;
+ if (mbo >= AHA1542_MAILBOXES)
+ mbo = 0;
+ } while (mbo != aha1542->aha1542_last_mbo_used);
+
+ if (mb[mbo].status || aha1542->int_cmds[mbo])
+ panic("Unable to find empty mailbox for aha1542.\n");
+
+ aha1542->int_cmds[mbo] = cmd; /* This will effectively prevent someone else from
+ screwing with this cdb. */
+
+ aha1542->aha1542_last_mbo_used = mbo;
+
+#ifdef DEBUG
+ shost_printk(KERN_DEBUG, sh, "Sending command (%d %p)...", mbo, cmd->scsi_done);
+#endif
+
+ any2scsi(mb[mbo].ccbptr, isa_virt_to_bus(&ccb[mbo])); /* This gets trashed for some reason */
+
+ memset(&ccb[mbo], 0, sizeof(struct ccb));
+
+ ccb[mbo].cdblen = cmd->cmd_len;
+
+ direction = 0;
+ if (*cmd->cmnd == READ_10 || *cmd->cmnd == READ_6)
+ direction = 8;
+ else if (*cmd->cmnd == WRITE_10 || *cmd->cmnd == WRITE_6)
+ direction = 16;
+
+ memcpy(ccb[mbo].cdb, cmd->cmnd, ccb[mbo].cdblen);
+
+ if (bufflen) {
+ struct scatterlist *sg;
+ int i;
+
+ ccb[mbo].op = 2; /* SCSI Initiator Command w/scatter-gather */
+ cmd->host_scribble = (void *)cptr;
+ scsi_for_each_sg(cmd, sg, sg_count, i) {
+ any2scsi(cptr[i].dataptr, isa_page_to_bus(sg_page(sg))
+ + sg->offset);
+ any2scsi(cptr[i].datalen, sg->length);
+ };
+ any2scsi(ccb[mbo].datalen, sg_count * sizeof(struct chain));
+ any2scsi(ccb[mbo].dataptr, isa_virt_to_bus(cptr));
+#ifdef DEBUG
+ shost_printk(KERN_DEBUG, sh, "cptr %p: ", cptr);
+ print_hex_dump_bytes("cptr: ", DUMP_PREFIX_NONE, cptr, 18);
+#endif
+ } else {
+ ccb[mbo].op = 0; /* SCSI Initiator Command */
+ cmd->host_scribble = NULL;
+ any2scsi(ccb[mbo].datalen, 0);
+ any2scsi(ccb[mbo].dataptr, 0);
+ };
+ ccb[mbo].idlun = (target & 7) << 5 | direction | (lun & 7); /*SCSI Target Id */
+ ccb[mbo].rsalen = 16;
+ ccb[mbo].linkptr[0] = ccb[mbo].linkptr[1] = ccb[mbo].linkptr[2] = 0;
+ ccb[mbo].commlinkid = 0;
+
+#ifdef DEBUG
+ print_hex_dump_bytes("sending: ", DUMP_PREFIX_NONE, &ccb[mbo], sizeof(ccb[mbo]) - 10);
+ printk("aha1542_queuecommand: now waiting for interrupt ");
+#endif
+ mb[mbo].status = 1;
+ aha1542_outb(cmd->device->host->io_port, CMD_START_SCSI);
+ spin_unlock_irqrestore(sh->host_lock, flags);
+
+ return 0;
+}
+
+/* Initialize mailboxes */
+static void setup_mailboxes(struct Scsi_Host *sh)
+{
+ struct aha1542_hostdata *aha1542 = shost_priv(sh);
+ int i;
+ struct mailbox *mb = aha1542->mb;
+ struct ccb *ccb = aha1542->ccb;
+
+ u8 mb_cmd[5] = { CMD_MBINIT, AHA1542_MAILBOXES, 0, 0, 0};
+
+ for (i = 0; i < AHA1542_MAILBOXES; i++) {
+ mb[i].status = mb[AHA1542_MAILBOXES + i].status = 0;
+ any2scsi(mb[i].ccbptr, isa_virt_to_bus(&ccb[i]));
+ };
+ aha1542_intr_reset(sh->io_port); /* reset interrupts, so they don't block */
+ any2scsi((mb_cmd + 2), isa_virt_to_bus(mb));
+ if (aha1542_out(sh->io_port, mb_cmd, 5))
+ shost_printk(KERN_ERR, sh, "failed setting up mailboxes\n");
+ aha1542_intr_reset(sh->io_port);
+}
+
+static int aha1542_getconfig(struct Scsi_Host *sh)
+{
+ u8 inquiry_result[3];
+ int i;
+ i = inb(STATUS(sh->io_port));
+ if (i & DF) {
+ i = inb(DATA(sh->io_port));
+ };
+ aha1542_outb(sh->io_port, CMD_RETCONF);
+ aha1542_in(sh->io_port, inquiry_result, 3, 0);
+ if (!wait_mask(INTRFLAGS(sh->io_port), INTRMASK, HACC, 0, 0))
+ shost_printk(KERN_ERR, sh, "error querying board settings\n");
+ aha1542_intr_reset(sh->io_port);
+ switch (inquiry_result[0]) {
+ case 0x80:
+ sh->dma_channel = 7;
+ break;
+ case 0x40:
+ sh->dma_channel = 6;
+ break;
+ case 0x20:
+ sh->dma_channel = 5;
+ break;
+ case 0x01:
+ sh->dma_channel = 0;
+ break;
+ case 0:
+ /* This means that the adapter, although Adaptec 1542 compatible, doesn't use a DMA channel.
+ Currently only aware of the BusLogic BT-445S VL-Bus adapter which needs this. */
+ sh->dma_channel = 0xFF;
+ break;
+ default:
+ shost_printk(KERN_ERR, sh, "Unable to determine DMA channel.\n");
+ return -1;
+ };
+ switch (inquiry_result[1]) {
+ case 0x40:
+ sh->irq = 15;
+ break;
+ case 0x20:
+ sh->irq = 14;
+ break;
+ case 0x8:
+ sh->irq = 12;
+ break;
+ case 0x4:
+ sh->irq = 11;
+ break;
+ case 0x2:
+ sh->irq = 10;
+ break;
+ case 0x1:
+ sh->irq = 9;
+ break;
+ default:
+ shost_printk(KERN_ERR, sh, "Unable to determine IRQ level.\n");
+ return -1;
+ };
+ sh->this_id = inquiry_result[2] & 7;
+ return 0;
+}
+
+/* This function should only be called for 1542C boards - we can detect
+ the special firmware settings and unlock the board */
+
+static int aha1542_mbenable(struct Scsi_Host *sh)
+{
+ static u8 mbenable_cmd[3];
+ static u8 mbenable_result[2];
+ int retval;
+
+ retval = BIOS_TRANSLATION_6432;
+
+ aha1542_outb(sh->io_port, CMD_EXTBIOS);
+ if (aha1542_in(sh->io_port, mbenable_result, 2, 100))
+ return retval;
+ if (!wait_mask(INTRFLAGS(sh->io_port), INTRMASK, HACC, 0, 100))
+ goto fail;
+ aha1542_intr_reset(sh->io_port);
+
+ if ((mbenable_result[0] & 0x08) || mbenable_result[1]) {
+ mbenable_cmd[0] = CMD_MBENABLE;
+ mbenable_cmd[1] = 0;
+ mbenable_cmd[2] = mbenable_result[1];
+
+ if ((mbenable_result[0] & 0x08) && (mbenable_result[1] & 0x03))
+ retval = BIOS_TRANSLATION_25563;
+
+ if (aha1542_out(sh->io_port, mbenable_cmd, 3))
+ goto fail;
+ };
+ while (0) {
+fail:
+ shost_printk(KERN_ERR, sh, "Mailbox init failed\n");
+ }
+ aha1542_intr_reset(sh->io_port);
+ return retval;
+}
+
+/* Query the board to find out if it is a 1542 or a 1740, or whatever. */
+static int aha1542_query(struct Scsi_Host *sh)
+{
+ struct aha1542_hostdata *aha1542 = shost_priv(sh);
+ u8 inquiry_result[4];
+ int i;
+ i = inb(STATUS(sh->io_port));
+ if (i & DF) {
+ i = inb(DATA(sh->io_port));
+ };
+ aha1542_outb(sh->io_port, CMD_INQUIRY);
+ aha1542_in(sh->io_port, inquiry_result, 4, 0);
+ if (!wait_mask(INTRFLAGS(sh->io_port), INTRMASK, HACC, 0, 0))
+ shost_printk(KERN_ERR, sh, "error querying card type\n");
+ aha1542_intr_reset(sh->io_port);
+
+ aha1542->bios_translation = BIOS_TRANSLATION_6432; /* Default case */
+
+ /* For an AHA1740 series board, we ignore the board since there is a
+ hardware bug which can lead to wrong blocks being returned if the board
+ is operating in the 1542 emulation mode. Since there is an extended mode
+ driver, we simply ignore the board and let the 1740 driver pick it up.
+ */
+
+ if (inquiry_result[0] == 0x43) {
+ shost_printk(KERN_INFO, sh, "Emulation mode not supported for AHA-1740 hardware, use aha1740 driver instead.\n");
+ return 1;
+ };
+
+ /* Always call this - boards that do not support extended bios translation
+ will ignore the command, and we will set the proper default */
+
+ aha1542->bios_translation = aha1542_mbenable(sh);
+
+ return 0;
+}
+
+static u8 dma_speed_hw(int dma_speed)
+{
+ switch (dma_speed) {
+ case 5:
+ return 0x00;
+ case 6:
+ return 0x04;
+ case 7:
+ return 0x01;
+ case 8:
+ return 0x02;
+ case 10:
+ return 0x03;
+ }
+
+ return 0xff; /* invalid */
+}
+
+/* Set the Bus on/off-times as not to ruin floppy performance */
+static void aha1542_set_bus_times(struct Scsi_Host *sh, int bus_on, int bus_off, int dma_speed)
+{
+ if (bus_on > 0) {
+ u8 oncmd[] = { CMD_BUSON_TIME, clamp(bus_on, 2, 15) };
+
+ aha1542_intr_reset(sh->io_port);
+ if (aha1542_out(sh->io_port, oncmd, 2))
+ goto fail;
+ }
+
+ if (bus_off > 0) {
+ u8 offcmd[] = { CMD_BUSOFF_TIME, clamp(bus_off, 1, 64) };
+
+ aha1542_intr_reset(sh->io_port);
+ if (aha1542_out(sh->io_port, offcmd, 2))
+ goto fail;
+ }
+
+ if (dma_speed_hw(dma_speed) != 0xff) {
+ u8 dmacmd[] = { CMD_DMASPEED, dma_speed_hw(dma_speed) };
+
+ aha1542_intr_reset(sh->io_port);
+ if (aha1542_out(sh->io_port, dmacmd, 2))
+ goto fail;
+ }
+ aha1542_intr_reset(sh->io_port);
+ return;
+fail:
+ shost_printk(KERN_ERR, sh, "setting bus on/off-time failed\n");
+ aha1542_intr_reset(sh->io_port);
+}
+
+/* return non-zero on detection */
+static struct Scsi_Host *aha1542_hw_init(struct scsi_host_template *tpnt, struct device *pdev, int indx)
+{
+ unsigned int base_io = io[indx];
+ struct Scsi_Host *sh;
+ struct aha1542_hostdata *aha1542;
+ char dma_info[] = "no DMA";
+
+ if (base_io == 0)
+ return NULL;
+
+ if (!request_region(base_io, AHA1542_REGION_SIZE, "aha1542"))
+ return NULL;
+
+ sh = scsi_host_alloc(tpnt, sizeof(struct aha1542_hostdata));
+ if (!sh)
+ goto release;
+ aha1542 = shost_priv(sh);
+
+ sh->unique_id = base_io;
+ sh->io_port = base_io;
+ sh->n_io_port = AHA1542_REGION_SIZE;
+ aha1542->aha1542_last_mbi_used = 2 * AHA1542_MAILBOXES - 1;
+ aha1542->aha1542_last_mbo_used = AHA1542_MAILBOXES - 1;
+
+ if (!aha1542_test_port(sh))
+ goto unregister;
+
+ aha1542_set_bus_times(sh, bus_on[indx], bus_off[indx], dma_speed[indx]);
+ if (aha1542_query(sh))
+ goto unregister;
+ if (aha1542_getconfig(sh) == -1)
+ goto unregister;
+
+ if (sh->dma_channel != 0xFF)
+ snprintf(dma_info, sizeof(dma_info), "DMA %d", sh->dma_channel);
+ shost_printk(KERN_INFO, sh, "Adaptec AHA-1542 (SCSI-ID %d) at IO 0x%x, IRQ %d, %s\n",
+ sh->this_id, base_io, sh->irq, dma_info);
+ if (aha1542->bios_translation == BIOS_TRANSLATION_25563)
+ shost_printk(KERN_INFO, sh, "Using extended bios translation\n");
+
+ setup_mailboxes(sh);
+
+ if (request_irq(sh->irq, aha1542_interrupt, 0, "aha1542", sh)) {
+ shost_printk(KERN_ERR, sh, "Unable to allocate IRQ.\n");
+ goto unregister;
+ }
+ if (sh->dma_channel != 0xFF) {
+ if (request_dma(sh->dma_channel, "aha1542")) {
+ shost_printk(KERN_ERR, sh, "Unable to allocate DMA channel.\n");
+ goto free_irq;
+ }
+ if (sh->dma_channel == 0 || sh->dma_channel >= 5) {
+ set_dma_mode(sh->dma_channel, DMA_MODE_CASCADE);
+ enable_dma(sh->dma_channel);
+ }
+ }
+
+ if (scsi_add_host(sh, pdev))
+ goto free_dma;
+
+ scsi_scan_host(sh);
+
+ return sh;
+free_dma:
+ if (sh->dma_channel != 0xff)
+ free_dma(sh->dma_channel);
+free_irq:
+ free_irq(sh->irq, sh);
+unregister:
+ scsi_host_put(sh);
+release:
+ release_region(base_io, AHA1542_REGION_SIZE);
+
+ return NULL;
+}
+
+static int aha1542_release(struct Scsi_Host *sh)
+{
+ scsi_remove_host(sh);
+ if (sh->dma_channel != 0xff)
+ free_dma(sh->dma_channel);
+ if (sh->irq)
+ free_irq(sh->irq, sh);
+ if (sh->io_port && sh->n_io_port)
+ release_region(sh->io_port, sh->n_io_port);
+ scsi_host_put(sh);
+ return 0;
+}
+
+
+/*
+ * This is a device reset. This is handled by sending a special command
+ * to the device.
+ */
+static int aha1542_dev_reset(struct scsi_cmnd *cmd)
+{
+ struct Scsi_Host *sh = cmd->device->host;
+ struct aha1542_hostdata *aha1542 = shost_priv(sh);
+ unsigned long flags;
+ struct mailbox *mb = aha1542->mb;
+ u8 target = cmd->device->id;
+ u8 lun = cmd->device->lun;
+ int mbo;
+ struct ccb *ccb = aha1542->ccb;
+
+ spin_lock_irqsave(sh->host_lock, flags);
+ mbo = aha1542->aha1542_last_mbo_used + 1;
+ if (mbo >= AHA1542_MAILBOXES)
+ mbo = 0;
+
+ do {
+ if (mb[mbo].status == 0 && aha1542->int_cmds[mbo] == NULL)
+ break;
+ mbo++;
+ if (mbo >= AHA1542_MAILBOXES)
+ mbo = 0;
+ } while (mbo != aha1542->aha1542_last_mbo_used);
+
+ if (mb[mbo].status || aha1542->int_cmds[mbo])
+ panic("Unable to find empty mailbox for aha1542.\n");
+
+ aha1542->int_cmds[mbo] = cmd; /* This will effectively
+ prevent someone else from
+ screwing with this cdb. */
+
+ aha1542->aha1542_last_mbo_used = mbo;
+
+ any2scsi(mb[mbo].ccbptr, isa_virt_to_bus(&ccb[mbo])); /* This gets trashed for some reason */
+
+ memset(&ccb[mbo], 0, sizeof(struct ccb));
+
+ ccb[mbo].op = 0x81; /* BUS DEVICE RESET */
+
+ ccb[mbo].idlun = (target & 7) << 5 | (lun & 7); /*SCSI Target Id */
+
+ ccb[mbo].linkptr[0] = ccb[mbo].linkptr[1] = ccb[mbo].linkptr[2] = 0;
+ ccb[mbo].commlinkid = 0;
+
+ /*
+ * Now tell the 1542 to flush all pending commands for this
+ * target
+ */
+ aha1542_outb(sh->io_port, CMD_START_SCSI);
+ spin_unlock_irqrestore(sh->host_lock, flags);
+
+ scmd_printk(KERN_WARNING, cmd,
+ "Trying device reset for target\n");
+
+ return SUCCESS;
+}
+
+static int aha1542_reset(struct scsi_cmnd *cmd, u8 reset_cmd)
+{
+ struct Scsi_Host *sh = cmd->device->host;
+ struct aha1542_hostdata *aha1542 = shost_priv(sh);
+ unsigned long flags;
+ int i;
+
+ spin_lock_irqsave(sh->host_lock, flags);
+ /*
+ * This does a scsi reset for all devices on the bus.
+ * In principle, we could also reset the 1542 - should
+ * we do this? Try this first, and we can add that later
+ * if it turns out to be useful.
+ */
+ outb(reset_cmd, CONTROL(cmd->device->host->io_port));
+
+ if (!wait_mask(STATUS(cmd->device->host->io_port),
+ STATMASK, IDLE, STST | DIAGF | INVDCMD | DF | CDF, 0)) {
+ spin_unlock_irqrestore(sh->host_lock, flags);
+ return FAILED;
+ }
+
+ /*
+ * We need to do this too before the 1542 can interact with
+ * us again after host reset.
+ */
+ if (reset_cmd & HRST)
+ setup_mailboxes(cmd->device->host);
+
+ /*
+ * Now try to pick up the pieces. For all pending commands,
+ * free any internal data structures, and basically clear things
+ * out. We do not try and restart any commands or anything -
+ * the strategy handler takes care of that crap.
+ */
+ shost_printk(KERN_WARNING, cmd->device->host, "Sent BUS RESET to scsi host %d\n", cmd->device->host->host_no);
+
+ for (i = 0; i < AHA1542_MAILBOXES; i++) {
+ if (aha1542->int_cmds[i] != NULL) {
+ struct scsi_cmnd *tmp_cmd;
+ tmp_cmd = aha1542->int_cmds[i];
+
+ if (tmp_cmd->device->soft_reset) {
+ /*
+ * If this device implements the soft reset option,
+ * then it is still holding onto the command, and
+ * may yet complete it. In this case, we don't
+ * flush the data.
+ */
+ continue;
+ }
+ kfree(tmp_cmd->host_scribble);
+ tmp_cmd->host_scribble = NULL;
+ aha1542->int_cmds[i] = NULL;
+ aha1542->mb[i].status = 0;
+ }
+ }
+
+ spin_unlock_irqrestore(sh->host_lock, flags);
+ return SUCCESS;
+}
+
+static int aha1542_bus_reset(struct scsi_cmnd *cmd)
+{
+ return aha1542_reset(cmd, SCRST);
+}
+
+static int aha1542_host_reset(struct scsi_cmnd *cmd)
+{
+ return aha1542_reset(cmd, HRST | SCRST);
+}
+
+static int aha1542_biosparam(struct scsi_device *sdev,
+ struct block_device *bdev, sector_t capacity, int geom[])
+{
+ struct aha1542_hostdata *aha1542 = shost_priv(sdev->host);
+
+ if (capacity >= 0x200000 &&
+ aha1542->bios_translation == BIOS_TRANSLATION_25563) {
+ /* Please verify that this is the same as what DOS returns */
+ geom[0] = 255; /* heads */
+ geom[1] = 63; /* sectors */
+ } else {
+ geom[0] = 64; /* heads */
+ geom[1] = 32; /* sectors */
+ }
+ geom[2] = sector_div(capacity, geom[0] * geom[1]); /* cylinders */
+
+ return 0;
+}
+MODULE_LICENSE("GPL");
+
+static struct scsi_host_template driver_template = {
+ .module = THIS_MODULE,
+ .proc_name = "aha1542",
+ .name = "Adaptec 1542",
+ .queuecommand = aha1542_queuecommand,
+ .eh_device_reset_handler= aha1542_dev_reset,
+ .eh_bus_reset_handler = aha1542_bus_reset,
+ .eh_host_reset_handler = aha1542_host_reset,
+ .bios_param = aha1542_biosparam,
+ .can_queue = AHA1542_MAILBOXES,
+ .this_id = 7,
+ .sg_tablesize = 16,
+ .cmd_per_lun = 1,
+ .unchecked_isa_dma = 1,
+ .use_clustering = ENABLE_CLUSTERING,
+};
+
+static int aha1542_isa_match(struct device *pdev, unsigned int ndev)
+{
+ struct Scsi_Host *sh = aha1542_hw_init(&driver_template, pdev, ndev);
+
+ if (!sh)
+ return 0;
+
+ dev_set_drvdata(pdev, sh);
+ return 1;
+}
+
+static int aha1542_isa_remove(struct device *pdev,
+ unsigned int ndev)
+{
+ aha1542_release(dev_get_drvdata(pdev));
+ dev_set_drvdata(pdev, NULL);
+ return 0;
+}
+
+static struct isa_driver aha1542_isa_driver = {
+ .match = aha1542_isa_match,
+ .remove = aha1542_isa_remove,
+ .driver = {
+ .name = "aha1542"
+ },
+};
+static int isa_registered;
+
+#ifdef CONFIG_PNP
+static struct pnp_device_id aha1542_pnp_ids[] = {
+ { .id = "ADP1542" },
+ { .id = "" }
+};
+MODULE_DEVICE_TABLE(pnp, aha1542_pnp_ids);
+
+static int aha1542_pnp_probe(struct pnp_dev *pdev, const struct pnp_device_id *id)
+{
+ int indx;
+ struct Scsi_Host *sh;
+
+ for (indx = 0; indx < ARRAY_SIZE(io); indx++) {
+ if (io[indx])
+ continue;
+
+ if (pnp_activate_dev(pdev) < 0)
+ continue;
+
+ io[indx] = pnp_port_start(pdev, 0);
+
+ /* The card can be queried for its DMA, we have
+ the DMA set up that is enough */
+
+ dev_info(&pdev->dev, "ISAPnP found an AHA1535 at I/O 0x%03X", io[indx]);
+ }
+
+ sh = aha1542_hw_init(&driver_template, &pdev->dev, indx);
+ if (!sh)
+ return -ENODEV;
+
+ pnp_set_drvdata(pdev, sh);
+ return 0;
+}
+
+static void aha1542_pnp_remove(struct pnp_dev *pdev)
+{
+ aha1542_release(pnp_get_drvdata(pdev));
+ pnp_set_drvdata(pdev, NULL);
+}
+
+static struct pnp_driver aha1542_pnp_driver = {
+ .name = "aha1542",
+ .id_table = aha1542_pnp_ids,
+ .probe = aha1542_pnp_probe,
+ .remove = aha1542_pnp_remove,
+};
+static int pnp_registered;
+#endif /* CONFIG_PNP */
+
+static int __init aha1542_init(void)
+{
+ int ret = 0;
+
+#ifdef CONFIG_PNP
+ if (isapnp) {
+ ret = pnp_register_driver(&aha1542_pnp_driver);
+ if (!ret)
+ pnp_registered = 1;
+ }
+#endif
+ ret = isa_register_driver(&aha1542_isa_driver, MAXBOARDS);
+ if (!ret)
+ isa_registered = 1;
+
+#ifdef CONFIG_PNP
+ if (pnp_registered)
+ ret = 0;
+#endif
+ if (isa_registered)
+ ret = 0;
+
+ return ret;
+}
+
+static void __exit aha1542_exit(void)
+{
+#ifdef CONFIG_PNP
+ if (pnp_registered)
+ pnp_unregister_driver(&aha1542_pnp_driver);
+#endif
+ if (isa_registered)
+ isa_unregister_driver(&aha1542_isa_driver);
+}
+
+module_init(aha1542_init);
+module_exit(aha1542_exit);
Code Review / kvmfornfv.git / blobdiff