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/*
* 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;
}
#ifdef CONFIG_HIL
/* Reset (NMI) via HIL-Keyboard. */
static void
wax_hil_nmi(int irq, void *handle, struct pt_regs *regs)
{
printk(KERN_CRIT "HIL-NMI !\n");
}
#endif
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.
* On B/C/J class machines, wax_choose_irq won't match any device so
* no harm will be done.
*/
fixup_child_irqs(dev->parent, wax->busdev_region->data.irqbase,
wax_choose_irq);
/* Register the HIL-Keyboard NMI-Handler */
#ifdef CONFIG_HIL
request_irq( (wax->busdev_region->data.irqbase) + WAX_GSC_NMI_IRQ,
&wax_hil_nmi, 0, "wax_hil_nmi", NULL);
printk(KERN_INFO "%s: HIL Keyboard-NMI registered.\n", wax->name);
#endif
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,
};
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