patch-2.4.20 linux-2.4.20/drivers/gsc/wax.c

• Lines: 143
• Date: Thu Nov 28 15:53:12 2002
• Orig file: linux-2.4.19/drivers/gsc/wax.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.19/drivers/gsc/wax.c linux-2.4.20/drivers/gsc/wax.c
@@ -0,0 +1,142 @@
+/*
+ *	WAX Device Driver
+ *
+ *	(c) Copyright 2000 The Puffin Group Inc.
+ *
+ *	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.
+ *
+ *	by Helge Deller <deller@gmx.de>
+ */
+
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+
+#include <asm/io.h>
+#include <asm/hardware.h>
+#include <asm/gsc.h>
+#include <asm/irq.h>
+
+#include "busdevice.h"
+
+#define WAX_GSC_IRQ	7	/* Hardcoded Interrupt for GSC */
+#define WAX_GSC_NMI_IRQ	29
+
+static int wax_choose_irq(struct parisc_device *dev)
+{
+	int irq = -1;
+
+	switch (dev->id.sversion) {
+		case 0x73:	irq = 30; break; /* HIL */
+		case 0x8c:	irq = 25; break; /* RS232 */
+		case 0x90:	irq = 21; break; /* WAX EISA BA */
+	}
+
+	return irq;
+}
+
+static void __init
+wax_init_irq(struct busdevice *wax)
+{
+	unsigned long base = wax->hpa;
+
+	/* Stop WAX barking for a bit */
+	gsc_writel(0x00000000, base+OFFSET_IMR);
+
+	/* clear pending interrupts */
+	(volatile u32) gsc_readl(base+OFFSET_IRR);
+
+	/* We're not really convinced we want to reset the onboard
+         * devices. Firmware does it for us...
+	 */
+
+	/* Resets */
+//	gsc_writel(0xFFFFFFFF, base+0x1000); /* HIL */
+//	gsc_writel(0xFFFFFFFF, base+0x2000); /* RS232-B on Wax */
+	
+	/* Ok we hit it on the head with a hammer, our Dog is now
+	** comatose and muzzled.  Devices will now unmask WAX
+	** interrupts as they are registered as irq's in the WAX range.
+	*/
+}
+
+int __init
+wax_init_chip(struct parisc_device *dev)
+{
+	struct busdevice *wax;
+	struct gsc_irq gsc_irq;
+	int irq, ret;
+
+	wax = kmalloc(sizeof(struct busdevice), GFP_KERNEL);
+	if (!wax)
+		return -ENOMEM;
+
+	wax->name = "Wax";
+	wax->hpa = dev->hpa;
+
+	wax->version = 0;   /* gsc_readb(wax->hpa+WAX_VER); */
+	printk(KERN_INFO "%s at 0x%lx found.\n", wax->name, wax->hpa);
+
+	/* Stop wax hissing for a bit */
+	wax_init_irq(wax);
+
+	/* the IRQ wax should use */
+	irq = gsc_claim_irq(&gsc_irq, WAX_GSC_IRQ);
+	if (irq < 0) {
+		printk(KERN_ERR "%s(): cannot get GSC irq\n",
+				__FUNCTION__);
+		kfree(wax);
+		return -EBUSY;
+	}
+
+	ret = request_irq(gsc_irq.irq, busdev_barked, 0, "wax", wax);
+	if (ret < 0) {
+		kfree(wax);
+		return ret;
+	}
+
+	/* Save this for debugging later */
+	wax->parent_irq = gsc_irq.irq;
+	wax->eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data;
+
+	/* enable IRQ's for devices below WAX */
+	gsc_writel(wax->eim, wax->hpa + OFFSET_IAR);
+
+	/* Done init'ing, register this driver */
+	ret = gsc_common_irqsetup(dev, wax);
+	if (ret) {
+		kfree(wax);
+		return ret;
+	}
+
+	fixup_child_irqs(dev, wax->busdev_region->data.irqbase,
+			wax_choose_irq);
+	/* On 715-class machines, Wax EISA is a sibling of Wax, not a child. */
+	if (dev->parent->id.hw_type != HPHW_IOA) {
+		fixup_child_irqs(dev->parent, wax->busdev_region->data.irqbase,
+				wax_choose_irq);
+	}
+
+	return ret;
+}
+
+static struct parisc_device_id wax_tbl[] = {
+  	{ HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008e },
+	{ 0, }
+};
+
+MODULE_DEVICE_TABLE(parisc, wax_tbl);
+
+struct parisc_driver wax_driver = {
+	name:		"Wax",
+	id_table:	wax_tbl,
+	probe:		wax_init_chip,
+};