patch-2.1.88 linux/drivers/acorn/block/ide-ics.c

• Lines: 272
• Date: Mon Feb 16 14:26:56 1998
• Orig file: v2.1.87/linux/drivers/acorn/block/ide-ics.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.87/linux/drivers/acorn/block/ide-ics.c linux/drivers/acorn/block/ide-ics.c
@@ -0,0 +1,271 @@
+/*
+ * linux/arch/arm/drivers/block/ide-ics.c
+ *
+ * Copyright (c) 1996,1997 Russell King.
+ *
+ * Changelog:
+ *  08-06-1996	RMK	Created
+ *  12-09-1997	RMK	Added interrupt enable/disable
+ */
+
+#include <linux/module.h>
+#include <linux/ioport.h>
+#include <linux/malloc.h>
+#include <linux/blkdev.h>
+#include <linux/errno.h>
+#include <linux/hdreg.h>
+
+#include <asm/ecard.h>
+#include <asm/io.h>
+
+#include "../../block/ide.h"
+
+/*
+ * Maximum number of interfaces per card
+ */
+#define MAX_IFS	2
+
+#define ICS_IDENT_OFFSET		0x8a0
+
+#define ICS_ARCIN_V5_INTROFFSET		0x001
+#define ICS_ARCIN_V5_IDEOFFSET		0xa00
+#define ICS_ARCIN_V5_IDEALTOFFSET	0xae0
+#define ICS_ARCIN_V5_IDESTEPPING	4
+
+#define ICS_ARCIN_V6_IDEOFFSET_1	0x800
+#define ICS_ARCIN_V6_INTROFFSET_1	0x880
+#define ICS_ARCIN_V6_IDEALTOFFSET_1	0x8e0
+#define ICS_ARCIN_V6_IDEOFFSET_2	0xc00
+#define ICS_ARCIN_V6_INTROFFSET_2	0xc80
+#define ICS_ARCIN_V6_IDEALTOFFSET_2	0xce0
+#define ICS_ARCIN_V6_IDESTEPPING	4
+
+static const card_ids icside_cids[] = {
+	{ MANU_ICS, PROD_ICS_IDE },
+	{ 0xffff, 0xffff }
+};
+
+typedef enum {
+	ics_if_unknown,
+	ics_if_arcin_v5,
+	ics_if_arcin_v6
+} iftype_t;
+
+static struct expansion_card *ec[MAX_ECARDS];
+static int result[MAX_ECARDS][MAX_IFS];
+
+
+/* ---------------- Version 5 PCB Support Functions --------------------- */
+/* Prototype: icside_irqenable_arcin_v5 (struct expansion_card *ec, int irqnr)
+ * Purpose  : enable interrupts from card
+ */
+static void icside_irqenable_arcin_v5 (struct expansion_card *ec, int irqnr)
+{
+	unsigned int memc_port = (unsigned int)ec->irq_data;
+	outb (0, memc_port + ICS_ARCIN_V5_INTROFFSET);
+}
+
+/* Prototype: icside_irqdisable_arcin_v5 (struct expansion_card *ec, int irqnr)
+ * Purpose  : disable interrupts from card
+ */
+static void icside_irqdisable_arcin_v5 (struct expansion_card *ec, int irqnr)
+{
+	unsigned int memc_port = (unsigned int)ec->irq_data;
+	inb (memc_port + ICS_ARCIN_V5_INTROFFSET);
+}
+
+static const expansioncard_ops_t icside_ops_arcin_v5 = {
+	icside_irqenable_arcin_v5,
+	icside_irqdisable_arcin_v5,
+	NULL,
+	NULL
+};
+
+
+/* ---------------- Version 6 PCB Support Functions --------------------- */
+/* Prototype: icside_irqenable_arcin_v6 (struct expansion_card *ec, int irqnr)
+ * Purpose  : enable interrupts from card
+ */
+static void icside_irqenable_arcin_v6 (struct expansion_card *ec, int irqnr)
+{
+	unsigned int ide_base_port = (unsigned int)ec->irq_data;
+	outb (0, ide_base_port + ICS_ARCIN_V6_INTROFFSET_1);
+	outb (0, ide_base_port + ICS_ARCIN_V6_INTROFFSET_2);
+}
+
+/* Prototype: icside_irqdisable_arcin_v6 (struct expansion_card *ec, int irqnr)
+ * Purpose  : disable interrupts from card
+ */
+static void icside_irqdisable_arcin_v6 (struct expansion_card *ec, int irqnr)
+{
+	unsigned int ide_base_port = (unsigned int)ec->irq_data;
+	inb (ide_base_port + ICS_ARCIN_V6_INTROFFSET_1);
+	inb (ide_base_port + ICS_ARCIN_V6_INTROFFSET_2);
+}
+
+static const expansioncard_ops_t icside_ops_arcin_v6 = {
+	icside_irqenable_arcin_v6,
+	icside_irqdisable_arcin_v6,
+	NULL,
+	NULL
+};
+
+
+
+/* Prototype: icside_identifyif (struct expansion_card *ec)
+ * Purpose  : identify IDE interface type
+ * Notes    : checks the description string
+ */
+static iftype_t icside_identifyif (struct expansion_card *ec)
+{
+	unsigned int addr;
+	iftype_t iftype;
+	int id = 0;
+
+	iftype = ics_if_unknown;
+
+	addr = ecard_address (ec, ECARD_IOC, ECARD_FAST) + ICS_IDENT_OFFSET;
+
+	id = inb (addr) & 1;
+	id |= (inb (addr + 1) & 1) << 1;
+	id |= (inb (addr + 2) & 1) << 2;
+	id |= (inb (addr + 3) & 1) << 3;
+
+	switch (id) {
+	case 0: /* A3IN */
+		printk ("icside: A3IN unsupported\n");
+		break;
+
+	case 1: /* A3USER */
+		printk ("icside: A3USER unsupported\n");
+		break;
+
+	case 3:	/* ARCIN V6 */
+		printk ("icside: detected ARCIN V6 in slot %d\n", ec->slot_no);
+		iftype = ics_if_arcin_v6;
+		break;
+
+	case 15:/* ARCIN V5 (no id) */
+		printk ("icside: detected ARCIN V5 in slot %d\n", ec->slot_no);
+		iftype = ics_if_arcin_v5;
+		break;
+
+	default:/* we don't know - complain very loudly */
+		printk ("icside: ***********************************\n");
+		printk ("icside: *** UNKNOWN ICS INTERFACE id=%d ***\n", id);
+		printk ("icside: ***********************************\n");
+		printk ("icside: please report this to: linux@arm.uk.linux.org\n");
+		printk ("icside: defaulting to ARCIN V5\n");
+		iftype = ics_if_arcin_v5;
+		break;
+	}
+
+	return iftype;
+}
+
+/* Prototype: icside_register (struct expansion_card *ec)
+ * Purpose  : register an ICS IDE card with the IDE driver
+ * Notes    : we make sure that interrupts are disabled from the card
+ */
+static inline void icside_register (struct expansion_card *ec, int index)
+{
+	unsigned long port;
+
+	result[index][0] = -1;
+	result[index][1] = -1;
+
+	switch (icside_identifyif (ec)) {
+	case ics_if_unknown:
+	default:
+		printk ("** Warning: ICS IDE Interface unrecognised! **\n");
+		break;
+
+	case ics_if_arcin_v5:
+		port = ecard_address (ec, ECARD_MEMC, 0);
+		ec->irq_data = (void *)port;
+		ec->ops = (expansioncard_ops_t *)&icside_ops_arcin_v5;
+
+		/*
+		 * Be on the safe side - disable interrupts
+		 */
+		inb (port + ICS_ARCIN_V5_INTROFFSET);
+		result[index][0] =
+			ide_register_port (port + ICS_ARCIN_V5_IDEOFFSET,
+					   port + ICS_ARCIN_V5_IDEALTOFFSET,
+					   ICS_ARCIN_V5_IDESTEPPING,
+					   ec->irq);
+		break;
+
+	case ics_if_arcin_v6:
+		port = ecard_address (ec, ECARD_IOC, ECARD_FAST);
+		ec->irq_data = (void *)port;
+		ec->ops = (expansioncard_ops_t *)&icside_ops_arcin_v6;
+
+		/*
+		 * Be on the safe side - disable interrupts
+		 */
+		inb (port + ICS_ARCIN_V6_INTROFFSET_1);
+		inb (port + ICS_ARCIN_V6_INTROFFSET_2);
+		result[index][0] =
+			ide_register_port (port + ICS_ARCIN_V6_IDEOFFSET_1,
+					   port + ICS_ARCIN_V6_IDEALTOFFSET_1,
+					   ICS_ARCIN_V6_IDESTEPPING,
+					   ec->irq);
+		result[index][1] =
+			ide_register_port (port + ICS_ARCIN_V6_IDEOFFSET_2,
+					   port + ICS_ARCIN_V6_IDEALTOFFSET_2,
+					   ICS_ARCIN_V6_IDESTEPPING,
+					   ec->irq);
+		break;
+	}		
+}
+
+int icside_init (void)
+{
+	int i;
+
+	for (i = 0; i < MAX_ECARDS; i++)
+		ec[i] = NULL;
+
+	ecard_startfind ();
+
+	for (i = 0; ; i++) {
+		if ((ec[i] = ecard_find (0, icside_cids)) == NULL)
+			break;
+
+		ecard_claim (ec[i]);
+		icside_register (ec[i], i);
+	}
+
+	for (i = 0; i < MAX_ECARDS; i++)
+		if (ec[i] && result[i][0] < 0 && result[i][1] < 0) {
+			ecard_release (ec[i]);
+			ec[i] = NULL;
+		}
+	return 0;
+}
+
+#ifdef MODULE
+int init_module (void)
+{
+	return icside_init();
+}
+
+void cleanup_module (void)
+{
+	int i;
+
+	for (i = 0; i < MAX_ECARDS; i++)
+		if (ec[i]) {
+			if (result[i][0] >= 0)
+				ide_unregister (result[i][0]);
+
+			if (result[i][1] >= 0)
+				ide_unregister (result[i][1]);
+				
+			ecard_release (ec[i]);
+			ec[i] = NULL;
+		}
+}
+#endif
+