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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/scsi/eata_pio.c
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'drivers/scsi/eata_pio.c')
-rw-r--r--drivers/scsi/eata_pio.c996
1 files changed, 996 insertions, 0 deletions
diff --git a/drivers/scsi/eata_pio.c b/drivers/scsi/eata_pio.c
new file mode 100644
index 000000000000..0ee49dc50b85
--- /dev/null
+++ b/drivers/scsi/eata_pio.c
@@ -0,0 +1,996 @@
+/************************************************************
+ * *
+ * Linux EATA SCSI PIO driver *
+ * *
+ * based on the CAM document CAM/89-004 rev. 2.0c, *
+ * DPT's driver kit, some internal documents and source, *
+ * and several other Linux scsi drivers and kernel docs. *
+ * *
+ * The driver currently: *
+ * -supports all EATA-PIO boards *
+ * -only supports DASD devices *
+ * *
+ * (c)1993-96 Michael Neuffer, Alfred Arnold *
+ * neuffer@goofy.zdv.uni-mainz.de *
+ * a.arnold@kfa-juelich.de *
+ * *
+ * Updated 2002 by Alan Cox <alan@redhat.com> for Linux *
+ * 2.5.x and the newer locking and error handling *
+ * *
+ * This program is free software; you can redistribute it *
+ * and/or modify it under the terms of the GNU General *
+ * Public License as published by the Free Software *
+ * Foundation; either version 2 of the License, or *
+ * (at your option) any later version. *
+ * *
+ * This program is distributed in the hope that it will be *
+ * useful, but WITHOUT ANY WARRANTY; without even the *
+ * implied warranty of MERCHANTABILITY or FITNESS FOR A *
+ * PARTICULAR PURPOSE. See the GNU General Public License *
+ * for more details. *
+ * *
+ * You should have received a copy of the GNU General *
+ * Public License along with this kernel; if not, write to *
+ * the Free Software Foundation, Inc., 675 Mass Ave, *
+ * Cambridge, MA 02139, USA. *
+ * *
+ * For the avoidance of doubt the "preferred form" of this *
+ * code is one which is in an open non patent encumbered *
+ * format. Where cryptographic key signing forms part of *
+ * the process of creating an executable the information *
+ * including keys needed to generate an equivalently *
+ * functional executable are deemed to be part of the *
+ * source code are deemed to be part of the source code. *
+ * *
+ ************************************************************
+ * last change: 2002/11/02 OS: Linux 2.5.45 *
+ ************************************************************/
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/string.h>
+#include <linux/ioport.h>
+#include <linux/slab.h>
+#include <linux/in.h>
+#include <linux/pci.h>
+#include <linux/proc_fs.h>
+#include <linux/interrupt.h>
+#include <linux/blkdev.h>
+#include <linux/spinlock.h>
+#include <linux/delay.h>
+
+#include <asm/io.h>
+
+#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_host.h>
+
+#include "eata_generic.h"
+#include "eata_pio.h"
+
+
+static uint ISAbases[MAXISA] = {
+ 0x1F0, 0x170, 0x330, 0x230
+};
+
+static uint ISAirqs[MAXISA] = {
+ 14, 12, 15, 11
+};
+
+static unsigned char EISAbases[] = {
+ 1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1
+};
+
+static uint registered_HBAs;
+static struct Scsi_Host *last_HBA;
+static struct Scsi_Host *first_HBA;
+static unsigned char reg_IRQ[16];
+static unsigned char reg_IRQL[16];
+static unsigned long int_counter;
+static unsigned long queue_counter;
+
+static struct scsi_host_template driver_template;
+
+/*
+ * eata_proc_info
+ * inout : decides on the direction of the dataflow and the meaning of the
+ * variables
+ * buffer: If inout==FALSE data is being written to it else read from it
+ * *start: If inout==FALSE start of the valid data in the buffer
+ * offset: If inout==FALSE offset from the beginning of the imaginary file
+ * from which we start writing into the buffer
+ * length: If inout==FALSE max number of bytes to be written into the buffer
+ * else number of bytes in the buffer
+ */
+static int eata_pio_proc_info(struct Scsi_Host *shost, char *buffer, char **start, off_t offset,
+ int length, int rw)
+{
+ static u8 buff[512];
+ int size, len = 0;
+ off_t begin = 0, pos = 0;
+
+ if (rw)
+ return -ENOSYS;
+ if (offset == 0)
+ memset(buff, 0, sizeof(buff));
+
+ size = sprintf(buffer+len, "EATA (Extended Attachment) PIO driver version: "
+ "%d.%d%s\n",VER_MAJOR, VER_MINOR, VER_SUB);
+ len += size; pos = begin + len;
+ size = sprintf(buffer + len, "queued commands: %10ld\n"
+ "processed interrupts:%10ld\n", queue_counter, int_counter);
+ len += size; pos = begin + len;
+
+ size = sprintf(buffer + len, "\nscsi%-2d: HBA %.10s\n",
+ shost->host_no, SD(shost)->name);
+ len += size;
+ pos = begin + len;
+ size = sprintf(buffer + len, "Firmware revision: v%s\n",
+ SD(shost)->revision);
+ len += size;
+ pos = begin + len;
+ size = sprintf(buffer + len, "IO: PIO\n");
+ len += size;
+ pos = begin + len;
+ size = sprintf(buffer + len, "Base IO : %#.4x\n", (u32) shost->base);
+ len += size;
+ pos = begin + len;
+ size = sprintf(buffer + len, "Host Bus: %s\n",
+ (SD(shost)->bustype == 'P')?"PCI ":
+ (SD(shost)->bustype == 'E')?"EISA":"ISA ");
+
+ len += size;
+ pos = begin + len;
+
+ if (pos < offset) {
+ len = 0;
+ begin = pos;
+ }
+ if (pos > offset + length)
+ goto stop_output;
+
+ stop_output:
+ DBG(DBG_PROC, printk("2pos: %ld offset: %ld len: %d\n", pos, offset, len));
+ *start=buffer+(offset-begin); /* Start of wanted data */
+ len-=(offset-begin); /* Start slop */
+ if(len>length)
+ len = length; /* Ending slop */
+ DBG(DBG_PROC, printk("3pos: %ld offset: %ld len: %d\n", pos, offset, len));
+
+ return (len);
+}
+
+static int eata_pio_release(struct Scsi_Host *sh)
+{
+ if (sh->irq && reg_IRQ[sh->irq] == 1)
+ free_irq(sh->irq, NULL);
+ else
+ reg_IRQ[sh->irq]--;
+ if (SD(sh)->channel == 0) {
+ if (sh->io_port && sh->n_io_port)
+ release_region(sh->io_port, sh->n_io_port);
+ }
+ return 1;
+}
+
+static void IncStat(struct scsi_pointer *SCp, uint Increment)
+{
+ SCp->ptr += Increment;
+ if ((SCp->this_residual -= Increment) == 0) {
+ if ((--SCp->buffers_residual) == 0)
+ SCp->Status = 0;
+ else {
+ SCp->buffer++;
+ SCp->ptr = page_address(SCp->buffer->page) + SCp->buffer->offset;
+ SCp->this_residual = SCp->buffer->length;
+ }
+ }
+}
+
+static void eata_pio_int_handler(int irq, void *dev_id, struct pt_regs *regs);
+
+static irqreturn_t do_eata_pio_int_handler(int irq, void *dev_id,
+ struct pt_regs *regs)
+{
+ unsigned long flags;
+ struct Scsi_Host *dev = dev_id;
+
+ spin_lock_irqsave(dev->host_lock, flags);
+ eata_pio_int_handler(irq, dev_id, regs);
+ spin_unlock_irqrestore(dev->host_lock, flags);
+ return IRQ_HANDLED;
+}
+
+static void eata_pio_int_handler(int irq, void *dev_id, struct pt_regs *regs)
+{
+ uint eata_stat = 0xfffff;
+ struct scsi_cmnd *cmd;
+ hostdata *hd;
+ struct eata_ccb *cp;
+ uint base;
+ uint x, z;
+ struct Scsi_Host *sh;
+ unsigned short zwickel = 0;
+ unsigned char stat, odd;
+
+ for (x = 1, sh = first_HBA; x <= registered_HBAs; x++, sh = SD(sh)->prev)
+ {
+ if (sh->irq != irq)
+ continue;
+ if (inb((uint) sh->base + HA_RSTATUS) & HA_SBUSY)
+ continue;
+
+ int_counter++;
+
+ hd = SD(sh);
+
+ cp = &hd->ccb[0];
+ cmd = cp->cmd;
+ base = (uint) cmd->device->host->base;
+
+ do {
+ stat = inb(base + HA_RSTATUS);
+ if (stat & HA_SDRQ) {
+ if (cp->DataIn) {
+ z = 256;
+ odd = 0;
+ while ((cmd->SCp.Status) && ((z > 0) || (odd))) {
+ if (odd) {
+ *(cmd->SCp.ptr) = zwickel >> 8;
+ IncStat(&cmd->SCp, 1);
+ odd = 0;
+ }
+ x = min_t(unsigned int, z, cmd->SCp.this_residual / 2);
+ insw(base + HA_RDATA, cmd->SCp.ptr, x);
+ z -= x;
+ IncStat(&cmd->SCp, 2 * x);
+ if ((z > 0) && (cmd->SCp.this_residual == 1)) {
+ zwickel = inw(base + HA_RDATA);
+ *(cmd->SCp.ptr) = zwickel & 0xff;
+ IncStat(&cmd->SCp, 1);
+ z--;
+ odd = 1;
+ }
+ }
+ while (z > 0) {
+ zwickel = inw(base + HA_RDATA);
+ z--;
+ }
+ } else { /* cp->DataOut */
+
+ odd = 0;
+ z = 256;
+ while ((cmd->SCp.Status) && ((z > 0) || (odd))) {
+ if (odd) {
+ zwickel += *(cmd->SCp.ptr) << 8;
+ IncStat(&cmd->SCp, 1);
+ outw(zwickel, base + HA_RDATA);
+ z--;
+ odd = 0;
+ }
+ x = min_t(unsigned int, z, cmd->SCp.this_residual / 2);
+ outsw(base + HA_RDATA, cmd->SCp.ptr, x);
+ z -= x;
+ IncStat(&cmd->SCp, 2 * x);
+ if ((z > 0) && (cmd->SCp.this_residual == 1)) {
+ zwickel = *(cmd->SCp.ptr);
+ zwickel &= 0xff;
+ IncStat(&cmd->SCp, 1);
+ odd = 1;
+ }
+ }
+ while (z > 0 || odd) {
+ outw(zwickel, base + HA_RDATA);
+ z--;
+ odd = 0;
+ }
+ }
+ }
+ }
+ while ((stat & HA_SDRQ) || ((stat & HA_SMORE) && hd->moresupport));
+
+ /* terminate handler if HBA goes busy again, i.e. transfers
+ * more data */
+
+ if (stat & HA_SBUSY)
+ break;
+
+ /* OK, this is quite stupid, but I haven't found any correct
+ * way to get HBA&SCSI status so far */
+
+ if (!(inb(base + HA_RSTATUS) & HA_SERROR)) {
+ cmd->result = (DID_OK << 16);
+ hd->devflags |= (1 << cp->cp_id);
+ } else if (hd->devflags & 1 << cp->cp_id)
+ cmd->result = (DID_OK << 16) + 0x02;
+ else
+ cmd->result = (DID_NO_CONNECT << 16);
+
+ if (cp->status == LOCKED) {
+ cp->status = FREE;
+ eata_stat = inb(base + HA_RSTATUS);
+ printk(KERN_CRIT "eata_pio: int_handler, freeing locked " "queueslot\n");
+ return;
+ }
+#if DBG_INTR2
+ if (stat != 0x50)
+ printk(KERN_DEBUG "stat: %#.2x, result: %#.8x\n", stat, cmd->result);
+#endif
+
+ cp->status = FREE; /* now we can release the slot */
+
+ cmd->scsi_done(cmd);
+ }
+
+ return;
+}
+
+static inline uint eata_pio_send_command(uint base, unsigned char command)
+{
+ uint loop = HZ / 2;
+
+ while (inb(base + HA_RSTATUS) & HA_SBUSY)
+ if (--loop == 0)
+ return 1;
+
+ /* Enable interrupts for HBA. It is not the best way to do it at this
+ * place, but I hope that it doesn't interfere with the IDE driver
+ * initialization this way */
+
+ outb(HA_CTRL_8HEADS, base + HA_CTRLREG);
+
+ outb(command, base + HA_WCOMMAND);
+ return 0;
+}
+
+static int eata_pio_queue(struct scsi_cmnd *cmd,
+ void (*done)(struct scsi_cmnd *))
+{
+ uint x, y;
+ uint base;
+
+ hostdata *hd;
+ struct Scsi_Host *sh;
+ struct eata_ccb *cp;
+
+ queue_counter++;
+
+ hd = HD(cmd);
+ sh = cmd->device->host;
+ base = (uint) sh->base;
+
+ /* use only slot 0, as 2001 can handle only one cmd at a time */
+
+ y = x = 0;
+
+ if (hd->ccb[y].status != FREE) {
+
+ DBG(DBG_QUEUE, printk(KERN_EMERG "can_queue %d, x %d, y %d\n", sh->can_queue, x, y));
+#if DEBUG_EATA
+ panic(KERN_EMERG "eata_pio: run out of queue slots cmdno:%ld " "intrno: %ld\n", queue_counter, int_counter);
+#else
+ panic(KERN_EMERG "eata_pio: run out of queue slots....\n");
+#endif
+ }
+
+ cp = &hd->ccb[y];
+
+ memset(cp, 0, sizeof(struct eata_ccb));
+ memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
+
+ cp->status = USED; /* claim free slot */
+
+ DBG(DBG_QUEUE, printk(KERN_DEBUG "eata_pio_queue pid %ld, target: %x, lun:" " %x, y %d\n", cmd->pid, cmd->device->id, cmd->device->lun, y));
+
+ cmd->scsi_done = (void *) done;
+
+ if (cmd->sc_data_direction == DMA_TO_DEVICE)
+ cp->DataOut = 1; /* Output mode */
+ else
+ cp->DataIn = 0; /* Input mode */
+
+ cp->Interpret = (cmd->device->id == hd->hostid);
+ cp->cp_datalen = htonl((unsigned long) cmd->request_bufflen);
+ cp->Auto_Req_Sen = 0;
+ cp->cp_reqDMA = htonl(0);
+ cp->reqlen = 0;
+
+ cp->cp_id = cmd->device->id;
+ cp->cp_lun = cmd->device->lun;
+ cp->cp_dispri = 0;
+ cp->cp_identify = 1;
+ memcpy(cp->cp_cdb, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd));
+
+ cp->cp_statDMA = htonl(0);
+
+ cp->cp_viraddr = cp;
+ cp->cmd = cmd;
+ cmd->host_scribble = (char *) &hd->ccb[y];
+
+ if (cmd->use_sg == 0) {
+ cmd->SCp.buffers_residual = 1;
+ cmd->SCp.ptr = cmd->request_buffer;
+ cmd->SCp.this_residual = cmd->request_bufflen;
+ cmd->SCp.buffer = NULL;
+ } else {
+ cmd->SCp.buffer = cmd->request_buffer;
+ cmd->SCp.buffers_residual = cmd->use_sg;
+ cmd->SCp.ptr = page_address(cmd->SCp.buffer->page) + cmd->SCp.buffer->offset;
+ cmd->SCp.this_residual = cmd->SCp.buffer->length;
+ }
+ cmd->SCp.Status = (cmd->SCp.this_residual != 0); /* TRUE as long as bytes
+ * are to transfer */
+
+ if (eata_pio_send_command(base, EATA_CMD_PIO_SEND_CP)) {
+ cmd->result = DID_BUS_BUSY << 16;
+ printk(KERN_NOTICE "eata_pio_queue target %d, pid %ld, HBA busy, " "returning DID_BUS_BUSY, done.\n", cmd->device->id, cmd->pid);
+ done(cmd);
+ cp->status = FREE;
+ return (0);
+ }
+ /* FIXME: timeout */
+ while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
+ cpu_relax();
+ outsw(base + HA_RDATA, cp, hd->cplen);
+ outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
+ for (x = 0; x < hd->cppadlen; x++)
+ outw(0, base + HA_RDATA);
+
+ DBG(DBG_QUEUE, printk(KERN_DEBUG "Queued base %#.4lx pid: %ld target: %x " "lun: %x slot %d irq %d\n", (long) sh->base, cmd->pid, cmd->device->id, cmd->device->lun, y, sh->irq));
+
+ return (0);
+}
+
+static int eata_pio_abort(struct scsi_cmnd *cmd)
+{
+ uint loop = HZ;
+
+ DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_abort called pid: %ld " "target: %x lun: %x reason %x\n", cmd->pid, cmd->device->id, cmd->device->lun, cmd->abort_reason));
+
+
+ while (inb(cmd->device->host->base + HA_RAUXSTAT) & HA_ABUSY)
+ if (--loop == 0) {
+ printk(KERN_WARNING "eata_pio: abort, timeout error.\n");
+ return FAILED;
+ }
+ if (CD(cmd)->status == FREE) {
+ DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_NOT_RUNNING\n"));
+ return FAILED;
+ }
+ if (CD(cmd)->status == USED) {
+ DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_BUSY\n"));
+ /* We want to sleep a bit more here */
+ return FAILED; /* SNOOZE */
+ }
+ if (CD(cmd)->status == RESET) {
+ printk(KERN_WARNING "eata_pio: abort, command reset error.\n");
+ return FAILED;
+ }
+ if (CD(cmd)->status == LOCKED) {
+ DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio: abort, queue slot " "locked.\n"));
+ return FAILED;
+ }
+ panic("eata_pio: abort: invalid slot status\n");
+}
+
+static int eata_pio_host_reset(struct scsi_cmnd *cmd)
+{
+ uint x, limit = 0;
+ unsigned char success = 0;
+ struct scsi_cmnd *sp;
+ struct Scsi_Host *host = cmd->device->host;
+
+ DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset called pid:%ld target:" " %x lun: %x reason %x\n", cmd->pid, cmd->device->id, cmd->device->lun, cmd->abort_reason));
+
+ if (HD(cmd)->state == RESET) {
+ printk(KERN_WARNING "eata_pio_reset: exit, already in reset.\n");
+ return FAILED;
+ }
+
+ /* force all slots to be free */
+
+ for (x = 0; x < cmd->device->host->can_queue; x++) {
+
+ if (HD(cmd)->ccb[x].status == FREE)
+ continue;
+
+ sp = HD(cmd)->ccb[x].cmd;
+ HD(cmd)->ccb[x].status = RESET;
+ printk(KERN_WARNING "eata_pio_reset: slot %d in reset, pid %ld.\n", x, sp->pid);
+
+ if (sp == NULL)
+ panic("eata_pio_reset: slot %d, sp==NULL.\n", x);
+ }
+
+ /* hard reset the HBA */
+ outb(EATA_CMD_RESET, (uint) cmd->device->host->base + HA_WCOMMAND);
+
+ DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: board reset done.\n"));
+ HD(cmd)->state = RESET;
+
+ spin_unlock_irq(host->host_lock);
+ msleep(3000);
+ spin_lock_irq(host->host_lock);
+
+ DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: interrupts disabled, " "loops %d.\n", limit));
+
+ for (x = 0; x < cmd->device->host->can_queue; x++) {
+
+ /* Skip slots already set free by interrupt */
+ if (HD(cmd)->ccb[x].status != RESET)
+ continue;
+
+ sp = HD(cmd)->ccb[x].cmd;
+ sp->result = DID_RESET << 16;
+
+ /* This mailbox is terminated */
+ printk(KERN_WARNING "eata_pio_reset: reset ccb %d.\n", x);
+ HD(cmd)->ccb[x].status = FREE;
+
+ sp->scsi_done(sp);
+ }
+
+ HD(cmd)->state = 0;
+
+ if (success) { /* hmmm... */
+ DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, success.\n"));
+ return SUCCESS;
+ } else {
+ DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, wakeup.\n"));
+ return FAILED;
+ }
+}
+
+static char *get_pio_board_data(unsigned long base, uint irq, uint id, unsigned long cplen, unsigned short cppadlen)
+{
+ struct eata_ccb cp;
+ static char buff[256];
+ int z;
+
+ memset(&cp, 0, sizeof(struct eata_ccb));
+ memset(buff, 0, sizeof(buff));
+
+ cp.DataIn = 1;
+ cp.Interpret = 1; /* Interpret command */
+
+ cp.cp_datalen = htonl(254);
+ cp.cp_dataDMA = htonl(0);
+
+ cp.cp_id = id;
+ cp.cp_lun = 0;
+
+ cp.cp_cdb[0] = INQUIRY;
+ cp.cp_cdb[1] = 0;
+ cp.cp_cdb[2] = 0;
+ cp.cp_cdb[3] = 0;
+ cp.cp_cdb[4] = 254;
+ cp.cp_cdb[5] = 0;
+
+ if (eata_pio_send_command((uint) base, EATA_CMD_PIO_SEND_CP))
+ return (NULL);
+ while (!(inb(base + HA_RSTATUS) & HA_SDRQ));
+ outsw(base + HA_RDATA, &cp, cplen);
+ outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND);
+ for (z = 0; z < cppadlen; z++)
+ outw(0, base + HA_RDATA);
+
+ while (inb(base + HA_RSTATUS) & HA_SBUSY);
+ if (inb(base + HA_RSTATUS) & HA_SERROR)
+ return (NULL);
+ else if (!(inb(base + HA_RSTATUS) & HA_SDRQ))
+ return (NULL);
+ else {
+ insw(base + HA_RDATA, &buff, 127);
+ while (inb(base + HA_RSTATUS) & HA_SDRQ)
+ inw(base + HA_RDATA);
+ return (buff);
+ }
+}
+
+static int get_pio_conf_PIO(u32 base, struct get_conf *buf)
+{
+ unsigned long loop = HZ / 2;
+ int z;
+ unsigned short *p;
+
+ if (!request_region(base, 9, "eata_pio"))
+ return 0;
+
+ memset(buf, 0, sizeof(struct get_conf));
+
+ while (inb(base + HA_RSTATUS) & HA_SBUSY)
+ if (--loop == 0)
+ goto fail;
+
+ DBG(DBG_PIO && DBG_PROBE, printk(KERN_DEBUG "Issuing PIO READ CONFIG to HBA at %#x\n", base));
+ eata_pio_send_command(base, EATA_CMD_PIO_READ_CONFIG);
+
+ loop = HZ / 2;
+ for (p = (unsigned short *) buf; (long) p <= ((long) buf + (sizeof(struct get_conf) / 2)); p++) {
+ while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
+ if (--loop == 0)
+ goto fail;
+
+ loop = HZ / 2;
+ *p = inw(base + HA_RDATA);
+ }
+ if (inb(base + HA_RSTATUS) & HA_SERROR) {
+ DBG(DBG_PROBE, printk("eata_dma: get_conf_PIO, error during "
+ "transfer for HBA at %x\n", base));
+ goto fail;
+ }
+
+ if (htonl(EATA_SIGNATURE) != buf->signature)
+ goto fail;
+
+ DBG(DBG_PIO && DBG_PROBE, printk(KERN_NOTICE "EATA Controller found "
+ "at %#4x EATA Level: %x\n",
+ base, (uint) (buf->version)));
+
+ while (inb(base + HA_RSTATUS) & HA_SDRQ)
+ inw(base + HA_RDATA);
+
+ if (!ALLOW_DMA_BOARDS) {
+ for (z = 0; z < MAXISA; z++)
+ if (base == ISAbases[z]) {
+ buf->IRQ = ISAirqs[z];
+ break;
+ }
+ }
+
+ return 1;
+
+ fail:
+ release_region(base, 9);
+ return 0;
+}
+
+static void print_pio_config(struct get_conf *gc)
+{
+ printk("Please check values: (read config data)\n");
+ printk("LEN: %d ver:%d OCS:%d TAR:%d TRNXFR:%d MORES:%d\n", (uint) ntohl(gc->len), gc->version, gc->OCS_enabled, gc->TAR_support, gc->TRNXFR, gc->MORE_support);
+ printk("HAAV:%d SCSIID0:%d ID1:%d ID2:%d QUEUE:%d SG:%d SEC:%d\n", gc->HAA_valid, gc->scsi_id[3], gc->scsi_id[2], gc->scsi_id[1], ntohs(gc->queuesiz), ntohs(gc->SGsiz), gc->SECOND);
+ printk("IRQ:%d IRQT:%d FORCADR:%d MCH:%d RIDQ:%d\n", gc->IRQ, gc->IRQ_TR, gc->FORCADR, gc->MAX_CHAN, gc->ID_qest);
+}
+
+static uint print_selftest(uint base)
+{
+ unsigned char buffer[512];
+#ifdef VERBOSE_SETUP
+ int z;
+#endif
+
+ printk("eata_pio: executing controller self test & setup...\n");
+ while (inb(base + HA_RSTATUS) & HA_SBUSY);
+ outb(EATA_CMD_PIO_SETUPTEST, base + HA_WCOMMAND);
+ do {
+ while (inb(base + HA_RSTATUS) & HA_SBUSY)
+ /* nothing */ ;
+ if (inb(base + HA_RSTATUS) & HA_SDRQ) {
+ insw(base + HA_RDATA, &buffer, 256);
+#ifdef VERBOSE_SETUP
+ /* no beeps please... */
+ for (z = 0; z < 511 && buffer[z]; z++)
+ if (buffer[z] != 7)
+ printk("%c", buffer[z]);
+#endif
+ }
+ } while (inb(base + HA_RSTATUS) & (HA_SBUSY | HA_SDRQ));
+
+ return (!(inb(base + HA_RSTATUS) & HA_SERROR));
+}
+
+static int register_pio_HBA(long base, struct get_conf *gc)
+{
+ unsigned long size = 0;
+ char *buff;
+ unsigned long cplen;
+ unsigned short cppadlen;
+ struct Scsi_Host *sh;
+ hostdata *hd;
+
+ DBG(DBG_REGISTER, print_pio_config(gc));
+
+ if (gc->DMA_support) {
+ printk("HBA at %#.4lx supports DMA. Please use EATA-DMA driver.\n", base);
+ if (!ALLOW_DMA_BOARDS)
+ return 0;
+ }
+
+ if ((buff = get_pio_board_data((uint) base, gc->IRQ, gc->scsi_id[3], cplen = (htonl(gc->cplen) + 1) / 2, cppadlen = (htons(gc->cppadlen) + 1) / 2)) == NULL) {
+ printk("HBA at %#lx didn't react on INQUIRY. Sorry.\n", (unsigned long) base);
+ return 0;
+ }
+
+ if (!print_selftest(base) && !ALLOW_DMA_BOARDS) {
+ printk("HBA at %#lx failed while performing self test & setup.\n", (unsigned long) base);
+ return 0;
+ }
+
+ size = sizeof(hostdata) + (sizeof(struct eata_ccb) * ntohs(gc->queuesiz));
+
+ sh = scsi_register(&driver_template, size);
+ if (sh == NULL)
+ return 0;
+
+ if (!reg_IRQ[gc->IRQ]) { /* Interrupt already registered ? */
+ if (!request_irq(gc->IRQ, do_eata_pio_int_handler, SA_INTERRUPT, "EATA-PIO", sh)) {
+ reg_IRQ[gc->IRQ]++;
+ if (!gc->IRQ_TR)
+ reg_IRQL[gc->IRQ] = 1; /* IRQ is edge triggered */
+ } else {
+ printk("Couldn't allocate IRQ %d, Sorry.\n", gc->IRQ);
+ return 0;
+ }
+ } else { /* More than one HBA on this IRQ */
+ if (reg_IRQL[gc->IRQ]) {
+ printk("Can't support more than one HBA on this IRQ,\n" " if the IRQ is edge triggered. Sorry.\n");
+ return 0;
+ } else
+ reg_IRQ[gc->IRQ]++;
+ }
+
+ hd = SD(sh);
+
+ memset(hd->ccb, 0, (sizeof(struct eata_ccb) * ntohs(gc->queuesiz)));
+ memset(hd->reads, 0, sizeof(unsigned long) * 26);
+
+ strlcpy(SD(sh)->vendor, &buff[8], sizeof(SD(sh)->vendor));
+ strlcpy(SD(sh)->name, &buff[16], sizeof(SD(sh)->name));
+ SD(sh)->revision[0] = buff[32];
+ SD(sh)->revision[1] = buff[33];
+ SD(sh)->revision[2] = buff[34];
+ SD(sh)->revision[3] = '.';
+ SD(sh)->revision[4] = buff[35];
+ SD(sh)->revision[5] = 0;
+
+ switch (ntohl(gc->len)) {
+ case 0x1c:
+ SD(sh)->EATA_revision = 'a';
+ break;
+ case 0x1e:
+ SD(sh)->EATA_revision = 'b';
+ break;
+ case 0x22:
+ SD(sh)->EATA_revision = 'c';
+ break;
+ case 0x24:
+ SD(sh)->EATA_revision = 'z';
+ default:
+ SD(sh)->EATA_revision = '?';
+ }
+
+ if (ntohl(gc->len) >= 0x22) {
+ if (gc->is_PCI)
+ hd->bustype = IS_PCI;
+ else if (gc->is_EISA)
+ hd->bustype = IS_EISA;
+ else
+ hd->bustype = IS_ISA;
+ } else {
+ if (buff[21] == '4')
+ hd->bustype = IS_PCI;
+ else if (buff[21] == '2')
+ hd->bustype = IS_EISA;
+ else
+ hd->bustype = IS_ISA;
+ }
+
+ SD(sh)->cplen = cplen;
+ SD(sh)->cppadlen = cppadlen;
+ SD(sh)->hostid = gc->scsi_id[3];
+ SD(sh)->devflags = 1 << gc->scsi_id[3];
+ SD(sh)->moresupport = gc->MORE_support;
+ sh->unique_id = base;
+ sh->base = base;
+ sh->io_port = base;
+ sh->n_io_port = 9;
+ sh->irq = gc->IRQ;
+ sh->dma_channel = PIO;
+ sh->this_id = gc->scsi_id[3];
+ sh->can_queue = 1;
+ sh->cmd_per_lun = 1;
+ sh->sg_tablesize = SG_ALL;
+
+ hd->channel = 0;
+
+ sh->max_id = 8;
+ sh->max_lun = 8;
+
+ if (gc->SECOND)
+ hd->primary = 0;
+ else
+ hd->primary = 1;
+
+ sh->unchecked_isa_dma = 0; /* We can only do PIO */
+
+ hd->next = NULL; /* build a linked list of all HBAs */
+ hd->prev = last_HBA;
+ if (hd->prev != NULL)
+ SD(hd->prev)->next = sh;
+ last_HBA = sh;
+ if (first_HBA == NULL)
+ first_HBA = sh;
+ registered_HBAs++;
+ return (1);
+}
+
+static void find_pio_ISA(struct get_conf *buf)
+{
+ int i;
+
+ for (i = 0; i < MAXISA; i++) {
+ if (!ISAbases[i])
+ continue;
+ if (!get_pio_conf_PIO(ISAbases[i], buf))
+ continue;
+ if (!register_pio_HBA(ISAbases[i], buf))
+ release_region(ISAbases[i], 9);
+ else
+ ISAbases[i] = 0;
+ }
+ return;
+}
+
+static void find_pio_EISA(struct get_conf *buf)
+{
+ u32 base;
+ int i;
+
+#ifdef CHECKPAL
+ u8 pal1, pal2, pal3;
+#endif
+
+ for (i = 0; i < MAXEISA; i++) {
+ if (EISAbases[i]) { /* Still a possibility ? */
+
+ base = 0x1c88 + (i * 0x1000);
+#ifdef CHECKPAL
+ pal1 = inb((u16) base - 8);
+ pal2 = inb((u16) base - 7);
+ pal3 = inb((u16) base - 6);
+
+ if (((pal1 == 0x12) && (pal2 == 0x14)) || ((pal1 == 0x38) && (pal2 == 0xa3) && (pal3 == 0x82)) || ((pal1 == 0x06) && (pal2 == 0x94) && (pal3 == 0x24))) {
+ DBG(DBG_PROBE, printk(KERN_NOTICE "EISA EATA id tags found: " "%x %x %x \n", (int) pal1, (int) pal2, (int) pal3));
+#endif
+ if (get_pio_conf_PIO(base, buf)) {
+ DBG(DBG_PROBE && DBG_EISA, print_pio_config(buf));
+ if (buf->IRQ) {
+ if (!register_pio_HBA(base, buf))
+ release_region(base, 9);
+ } else {
+ printk(KERN_NOTICE "eata_dma: No valid IRQ. HBA " "removed from list\n");
+ release_region(base, 9);
+ }
+ }
+ /* Nothing found here so we take it from the list */
+ EISAbases[i] = 0;
+#ifdef CHECKPAL
+ }
+#endif
+ }
+ }
+ return;
+}
+
+static void find_pio_PCI(struct get_conf *buf)
+{
+#ifndef CONFIG_PCI
+ printk("eata_dma: kernel PCI support not enabled. Skipping scan for PCI HBAs.\n");
+#else
+ struct pci_dev *dev = NULL;
+ u32 base, x;
+
+ while ((dev = pci_find_device(PCI_VENDOR_ID_DPT, PCI_DEVICE_ID_DPT, dev)) != NULL) {
+ DBG(DBG_PROBE && DBG_PCI, printk("eata_pio: find_PCI, HBA at %s\n", pci_name(dev)));
+ if (pci_enable_device(dev))
+ continue;
+ pci_set_master(dev);
+ base = pci_resource_flags(dev, 0);
+ if (base & IORESOURCE_MEM) {
+ printk("eata_pio: invalid base address of device %s\n", pci_name(dev));
+ continue;
+ }
+ base = pci_resource_start(dev, 0);
+ /* EISA tag there ? */
+ if ((inb(base) == 0x12) && (inb(base + 1) == 0x14))
+ continue; /* Jep, it's forced, so move on */
+ base += 0x10; /* Now, THIS is the real address */
+ if (base != 0x1f8) {
+ /* We didn't find it in the primary search */
+ if (get_pio_conf_PIO(base, buf)) {
+ if (buf->FORCADR) { /* If the address is forced */
+ release_region(base, 9);
+ continue; /* we'll find it later */
+ }
+
+ /* OK. We made it till here, so we can go now
+ * and register it. We only have to check and
+ * eventually remove it from the EISA and ISA list
+ */
+
+ if (!register_pio_HBA(base, buf)) {
+ release_region(base, 9);
+ continue;
+ }
+
+ if (base < 0x1000) {
+ for (x = 0; x < MAXISA; ++x) {
+ if (ISAbases[x] == base) {
+ ISAbases[x] = 0;
+ break;
+ }
+ }
+ } else if ((base & 0x0fff) == 0x0c88) {
+ x = (base >> 12) & 0x0f;
+ EISAbases[x] = 0;
+ }
+ }
+#ifdef CHECK_BLINK
+ else if (check_blink_state(base)) {
+ printk("eata_pio: HBA is in BLINK state.\n" "Consult your HBAs manual to correct this.\n");
+ }
+#endif
+ }
+ }
+#endif /* #ifndef CONFIG_PCI */
+}
+
+static int eata_pio_detect(struct scsi_host_template *tpnt)
+{
+ struct Scsi_Host *HBA_ptr;
+ struct get_conf gc;
+ int i;
+
+ find_pio_PCI(&gc);
+ find_pio_EISA(&gc);
+ find_pio_ISA(&gc);
+
+ for (i = 0; i <= MAXIRQ; i++)
+ if (reg_IRQ[i])
+ request_irq(i, do_eata_pio_int_handler, SA_INTERRUPT, "EATA-PIO", NULL);
+
+ HBA_ptr = first_HBA;
+
+ if (registered_HBAs != 0) {
+ printk("EATA (Extended Attachment) PIO driver version: %d.%d%s\n"
+ "(c) 1993-95 Michael Neuffer, neuffer@goofy.zdv.uni-mainz.de\n" " Alfred Arnold, a.arnold@kfa-juelich.de\n" "This release only supports DASD devices (harddisks)\n", VER_MAJOR, VER_MINOR, VER_SUB);
+
+ printk("Registered HBAs:\n");
+ printk("HBA no. Boardtype: Revis: EATA: Bus: BaseIO: IRQ: Ch: ID: Pr:" " QS: SG: CPL:\n");
+ for (i = 1; i <= registered_HBAs; i++) {
+ printk("scsi%-2d: %.10s v%s 2.0%c %s %#.4x %2d %d %d %c"
+ " %2d %2d %2d\n",
+ HBA_ptr->host_no, SD(HBA_ptr)->name, SD(HBA_ptr)->revision,
+ SD(HBA_ptr)->EATA_revision, (SD(HBA_ptr)->bustype == 'P') ?
+ "PCI " : (SD(HBA_ptr)->bustype == 'E') ? "EISA" : "ISA ",
+ (uint) HBA_ptr->base, HBA_ptr->irq, SD(HBA_ptr)->channel, HBA_ptr->this_id,
+ SD(HBA_ptr)->primary ? 'Y' : 'N', HBA_ptr->can_queue,
+ HBA_ptr->sg_tablesize, HBA_ptr->cmd_per_lun);
+ HBA_ptr = SD(HBA_ptr)->next;
+ }
+ }
+ return (registered_HBAs);
+}
+
+static struct scsi_host_template driver_template = {
+ .proc_name = "eata_pio",
+ .name = "EATA (Extended Attachment) PIO driver",
+ .proc_info = eata_pio_proc_info,
+ .detect = eata_pio_detect,
+ .release = eata_pio_release,
+ .queuecommand = eata_pio_queue,
+ .eh_abort_handler = eata_pio_abort,
+ .eh_host_reset_handler = eata_pio_host_reset,
+ .use_clustering = ENABLE_CLUSTERING,
+};
+
+MODULE_AUTHOR("Michael Neuffer, Alfred Arnold");
+MODULE_DESCRIPTION("EATA SCSI PIO driver");
+MODULE_LICENSE("GPL");
+
+#include "scsi_module.c"