patch-2.1.88 linux/drivers/acorn/scsi/oak.c

• Lines: 229
• Date: Fri Feb 6 16:26:57 1998
• Orig file: v2.1.87/linux/drivers/acorn/scsi/oak.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.87/linux/drivers/acorn/scsi/oak.c linux/drivers/acorn/scsi/oak.c
@@ -0,0 +1,228 @@
+#define AUTOSENSE
+/*#define PSEUDO_DMA*/
+
+/*
+ * Oak Generic NCR5380 driver
+ *
+ * Copyright 1995, Russell King
+ *
+ * ALPHA RELEASE 1.
+ *
+ * For more information, please consult
+ *
+ * NCR 5380 Family
+ * SCSI Protocol Controller
+ * Databook
+ *
+ * NCR Microelectronics
+ * 1635 Aeroplaza Drive
+ * Colorado Springs, CO 80916
+ * 1+ (719) 578-3400
+ * 1+ (800) 334-5454
+ */
+
+/*
+ * Options :
+ *
+ * PARITY - enable parity checking.  Not supported.
+ *
+ * SCSI2 - enable support for SCSI-II tagged queueing.  Untested.
+ *
+ * USLEEP - enable support for devices that don't disconnect.  Untested.
+ */
+
+/*
+ * $Log: oak.c,v $
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/ioport.h>
+#include <linux/blk.h>
+#include <linux/init.h>
+
+#include <asm/ecard.h>
+#include <asm/io.h>
+#include <asm/system.h>
+
+#include "../../scsi/scsi.h"
+#include "../../scsi/hosts.h"
+#include "oak.h"
+#include "../../scsi/NCR5380.h"
+#include "../../scsi/constants.h"
+
+#undef START_DMA_INITIATOR_RECEIVE_REG
+#define START_DMA_INITIATOR_RECEIVE_REG (7 + 128)
+
+static const card_ids oakscsi_cids[] = {
+	{ MANU_OAK, PROD_OAK_SCSI },
+	{ 0xffff, 0xffff }
+};
+
+static struct proc_dir_entry proc_scsi_oakscsi = {
+	PROC_SCSI_PAS16, 7, "oakscsi", S_IFDIR | S_IRUGO | S_IXUGO, 2
+};
+
+#define OAK_ADDRESS(card) (ecard_address((card), ECARD_MEMC, 0))
+#define OAK_IRQ(card)	  (IRQ_NONE)
+/*
+ * Function : int oakscsi_detect(Scsi_Host_Template * tpnt)
+ *
+ * Purpose : initializes oak NCR5380 driver based on the
+ *	command line / compile time port and irq definitions.
+ *
+ * Inputs : tpnt - template for this SCSI adapter.
+ *
+ * Returns : 1 if a host adapter was found, 0 if not.
+ *
+ */
+static struct expansion_card *ecs[4];
+
+int oakscsi_detect(Scsi_Host_Template * tpnt)
+{
+    int count = 0;
+    struct Scsi_Host *instance;
+
+    tpnt->proc_dir = &proc_scsi_oakscsi;
+
+    memset (ecs, 0, sizeof (ecs));
+
+    ecard_startfind ();
+
+    while(1) {
+        if ((ecs[count] = ecard_find(0, oakscsi_cids)) == NULL)
+            break;
+
+        instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata));
+        instance->io_port = OAK_ADDRESS(ecs[count]);
+        instance->irq = OAK_IRQ(ecs[count]);
+
+	NCR5380_init(instance, 0);
+	ecard_claim(ecs[count]);
+
+	instance->n_io_port = 255;
+	request_region (instance->io_port, instance->n_io_port, "Oak SCSI");
+
+	if (instance->irq != IRQ_NONE)
+	    if (request_irq(instance->irq, oakscsi_intr, SA_INTERRUPT, "Oak SCSI", NULL)) {
+		printk("scsi%d: IRQ%d not free, interrupts disabled\n",
+		    instance->host_no, instance->irq);
+		instance->irq = IRQ_NONE;
+	    }
+
+	if (instance->irq != IRQ_NONE) {
+	    printk("scsi%d: eek! Interrupts enabled, but I don't think\n", instance->host_no);
+	    printk("scsi%d: that the board had an interrupt!\n", instance->host_no);
+	}
+
+	printk("scsi%d: at port %X irq", instance->host_no, instance->io_port);
+	if (instance->irq == IRQ_NONE)
+	    printk ("s disabled");
+	else
+	    printk (" %d", instance->irq);
+	printk(" options CAN_QUEUE=%d  CMD_PER_LUN=%d release=%d",
+	    CAN_QUEUE, CMD_PER_LUN, OAKSCSI_PUBLIC_RELEASE);
+	printk("\nscsi%d:", instance->host_no);
+	NCR5380_print_options(instance);
+	printk("\n");
+
+	++count;
+    }
+#ifdef MODULE
+    if(count == 0)
+        printk("No oak scsi devices found\n");
+#endif
+    return count;
+}
+
+int oakscsi_release (struct Scsi_Host *shpnt)
+{
+	int i;
+
+	if (shpnt->irq != IRQ_NONE)
+		free_irq (shpnt->irq, NULL);
+	if (shpnt->io_port)
+		release_region (shpnt->io_port, shpnt->n_io_port);
+
+	for (i = 0; i < 4; i++)
+		if (shpnt->io_port == OAK_ADDRESS(ecs[i]))
+			ecard_release (ecs[i]);
+	return 0;
+}
+
+const char * oakscsi_info (struct Scsi_Host *spnt) {
+    return "";
+}
+
+#define STAT(p)   inw(p + 144)
+extern void inswb(int from, void *to, int len);
+
+static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *addr,
+              int len)
+{
+  int iobase = instance->io_port;
+printk("writing %p len %d\n",addr, len);
+  if(!len) return -1;
+
+  while(1)
+  {
+    int status;
+    while(((status = STAT(iobase)) & 0x100)==0);
+  }
+}
+
+static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *addr,
+              int len)
+{
+  int iobase = instance->io_port;
+printk("reading %p len %d\n", addr, len);
+  while(len > 0)
+  {
+    int status, timeout;
+    unsigned long b;
+    
+    timeout = 0x01FFFFFF;
+    
+    while(((status = STAT(iobase)) & 0x100)==0)
+    {
+      timeout--;
+      if(status & 0x200 || !timeout)
+      {
+        printk("status = %08X\n",status);
+        return 1;
+      }
+    }
+    if(len >= 128)
+    {
+      inswb(iobase + 136, addr, 128);
+      addr += 128;
+      len -= 128;
+    }
+    else
+    {
+      b = (unsigned long) inw(iobase + 136);
+      *addr ++ = b;
+      len -= 1;
+      if(len)
+        *addr ++ = b>>8;
+      len -= 1;
+    }
+  }
+  return 0;
+}
+
+#define oakscsi_read(instance,reg)	(inb((instance)->io_port + (reg)))
+#define oakscsi_write(instance,reg,val)	(outb((val), (instance)->io_port + (reg)))
+
+#undef STAT
+
+#include "../../scsi/NCR5380.c"
+
+#ifdef MODULE
+
+Scsi_Host_Template driver_template = OAK_NCR5380;
+
+#include "../../scsi/scsi_module.c"
+#endif