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

• Lines: 241
• Date: Fri Feb 6 16:24:45 1998
• Orig file: v2.1.87/linux/drivers/acorn/scsi/ecoscsi.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.87/linux/drivers/acorn/scsi/ecoscsi.c linux/drivers/acorn/scsi/ecoscsi.c
@@ -0,0 +1,240 @@
+#define AUTOSENSE
+/* #define PSEUDO_DMA */
+
+/*
+ * EcoSCSI 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: ecoscsi_NCR5380.c,v $
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/ioport.h>
+#include <linux/init.h>
+#include <linux/blk.h>
+
+#include <asm/io.h>
+#include <asm/system.h>
+
+#include "../../scsi/scsi.h"
+#include "../../scsi/hosts.h"
+#include "ecoscsi.h"
+#include "../../scsi/NCR5380.h"
+#include "../../scsi/constants.h"
+
+static struct proc_dir_entry proc_scsi_ecoscsi = {
+	PROC_SCSI_GENERIC_NCR5380, 7, "ecoscsi", S_IFDIR | S_IRUGO | S_IXUGO, 2
+};
+
+static char ecoscsi_read(struct Scsi_Host *instance, int reg)
+{
+  int iobase = instance->io_port;
+  outb(reg | 8, iobase);
+  return inb(iobase + 1);
+}
+
+static void ecoscsi_write(struct Scsi_Host *instance, int reg, int value)
+{
+  int iobase = instance->io_port;
+  outb(reg | 8, iobase);
+  outb(value, iobase + 1);
+}
+
+/*
+ * Function : ecoscsi_setup(char *str, int *ints)
+ *
+ * Purpose : LILO command line initialization of the overrides array,
+ *
+ * Inputs : str - unused, ints - array of integer parameters with ints[0]
+ *	equal to the number of ints.
+ *
+ */
+
+void ecoscsi_setup(char *str, int *ints) {
+}
+
+/*
+ * Function : int ecoscsi_detect(Scsi_Host_Template * tpnt)
+ *
+ * Purpose : initializes ecoscsi 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.
+ *
+ */
+
+int ecoscsi_detect(Scsi_Host_Template * tpnt)
+{
+    struct Scsi_Host *instance;
+
+    tpnt->proc_dir = &proc_scsi_ecoscsi;
+
+    instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata));
+    instance->io_port = 0x80ce8000;
+    instance->n_io_port = 144;
+    instance->irq = IRQ_NONE;
+
+    if (check_region (instance->io_port, instance->n_io_port)) {
+	scsi_unregister (instance);
+	return 0;
+    }
+
+    ecoscsi_write (instance, MODE_REG, 0x20);		/* Is it really SCSI? */
+    if (ecoscsi_read (instance, MODE_REG) != 0x20) {	/* Write to a reg.    */
+        scsi_unregister(instance);
+        return 0;					/* and try to read    */
+    }
+    ecoscsi_write( instance, MODE_REG, 0x00 );		/* it back.	      */
+    if (ecoscsi_read (instance, MODE_REG) != 0x00) {
+        scsi_unregister(instance);
+        return 0;
+    }
+
+    NCR5380_init(instance, 0);
+    request_region (instance->io_port, instance->n_io_port, "ecoscsi");
+
+    if (instance->irq != IRQ_NONE)
+	if (request_irq(instance->irq, ecoscsi_intr, SA_INTERRUPT, "ecoscsi", 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, ECOSCSI_PUBLIC_RELEASE);
+    printk("\nscsi%d:", instance->host_no);
+    NCR5380_print_options(instance);
+    printk("\n");
+    return 1;
+}
+
+int ecoscsi_release (struct Scsi_Host *shpnt)
+{
+	if (shpnt->irq != IRQ_NONE)
+		free_irq (shpnt->irq, NULL);
+	if (shpnt->io_port)
+		release_region (shpnt->io_port, shpnt->n_io_port);
+	return 0;
+}
+
+const char * ecoscsi_info (struct Scsi_Host *spnt) {
+    return "";
+}
+
+#if 0
+#define STAT(p) inw(p + 144)
+
+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;
+  int iobase2= instance->io_port + 0x100;
+  unsigned char *start = addr;
+  int s;
+printk("reading %p len %d\n",addr, len);
+  outb(inb(iobase + 128), iobase + 135);
+  while(len > 0)
+  {
+    int status,b,i, timeout;
+    timeout = 0x07FFFFFF;
+    while(((status = STAT(iobase)) & 0x100)==0)
+    {
+      timeout--;
+      if(status & 0x200 || !timeout)
+      {
+        printk("status = %p\n",status);
+        outb(0, iobase + 135);
+        return 1;
+      }
+    }
+    if(len >= 128)
+    {
+      for(i=0; i<64; i++)
+      {
+        b = inw(iobase + 136);
+        *addr++ = b;
+        *addr++ = b>>8;
+      }
+      len -= 128;
+    }
+    else
+    {
+      b = inw(iobase + 136);
+      *addr ++ = b;
+      len -= 1;
+      if(len)
+        *addr ++ = b>>8;
+      len -= 1;
+    }
+  }
+  outb(0, iobase + 135);
+  printk("first bytes = %02X %02X %02X %20X %02X %02X %02X\n",*start, start[1], start[2], start[3], start[4], start[5], start[6]);
+  return 1;
+}
+#endif
+#undef STAT
+
+#include "../../scsi/NCR5380.c"
+
+#ifdef MODULE
+
+Scsi_Host_Template driver_template = ECOSCSI_NCR5380;
+
+#include "../../scsi/scsi_module.c"
+#endif