bab8e3b4f6
[ Upstream commit 939fc856676c266c3bc347c1c1661872a3725c0f ] Add the missing logic to allow Lasi, WAX and Dino to set the CPU affinity. This fixes IRQ migration to other CPUs when a CPU is shutdown which currently holds the IRQs for one of those chips. Signed-off-by: Helge Deller <deller@gmx.de> Signed-off-by: Sasha Levin <sashal@kernel.org>
135 lines
3.0 KiB
C
135 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* WAX Device Driver
|
|
*
|
|
* (c) Copyright 2000 The Puffin Group Inc.
|
|
*
|
|
* 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/types.h>
|
|
|
|
#include <asm/io.h>
|
|
#include <asm/hardware.h>
|
|
|
|
#include "gsc.h"
|
|
|
|
#define WAX_GSC_IRQ 7 /* Hardcoded Interrupt for GSC */
|
|
|
|
static void wax_choose_irq(struct parisc_device *dev, void *ctrl)
|
|
{
|
|
int irq;
|
|
|
|
switch (dev->id.sversion) {
|
|
case 0x73: irq = 1; break; /* i8042 General */
|
|
case 0x8c: irq = 6; break; /* Serial */
|
|
case 0x90: irq = 10; break; /* EISA */
|
|
default: return; /* Unknown */
|
|
}
|
|
|
|
gsc_asic_assign_irq(ctrl, irq, &dev->irq);
|
|
|
|
switch (dev->id.sversion) {
|
|
case 0x73: irq = 2; break; /* i8042 High-priority */
|
|
case 0x90: irq = 0; break; /* EISA NMI */
|
|
default: return; /* No secondary IRQ */
|
|
}
|
|
|
|
gsc_asic_assign_irq(ctrl, irq, &dev->aux_irq);
|
|
}
|
|
|
|
static void __init
|
|
wax_init_irq(struct gsc_asic *wax)
|
|
{
|
|
unsigned long base = wax->hpa;
|
|
|
|
/* Wax-off */
|
|
gsc_writel(0x00000000, base+OFFSET_IMR);
|
|
|
|
/* clear pending interrupts */
|
|
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 */
|
|
}
|
|
|
|
static int __init wax_init_chip(struct parisc_device *dev)
|
|
{
|
|
struct gsc_asic *wax;
|
|
struct parisc_device *parent;
|
|
int ret;
|
|
|
|
wax = kzalloc(sizeof(*wax), GFP_KERNEL);
|
|
if (!wax)
|
|
return -ENOMEM;
|
|
|
|
wax->name = "wax";
|
|
wax->hpa = dev->hpa.start;
|
|
|
|
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 */
|
|
dev->irq = gsc_claim_irq(&wax->gsc_irq, WAX_GSC_IRQ);
|
|
if (dev->irq < 0) {
|
|
printk(KERN_ERR "%s(): cannot get GSC irq\n",
|
|
__func__);
|
|
kfree(wax);
|
|
return -EBUSY;
|
|
}
|
|
|
|
wax->eim = ((u32) wax->gsc_irq.txn_addr) | wax->gsc_irq.txn_data;
|
|
|
|
ret = request_irq(wax->gsc_irq.irq, gsc_asic_intr, 0, "wax", wax);
|
|
if (ret < 0) {
|
|
kfree(wax);
|
|
return ret;
|
|
}
|
|
|
|
/* enable IRQ's for devices below WAX */
|
|
gsc_writel(wax->eim, wax->hpa + OFFSET_IAR);
|
|
|
|
/* Done init'ing, register this driver */
|
|
ret = gsc_common_setup(dev, wax);
|
|
if (ret) {
|
|
kfree(wax);
|
|
return ret;
|
|
}
|
|
|
|
gsc_fixup_irqs(dev, wax, wax_choose_irq);
|
|
/* On 715-class machines, Wax EISA is a sibling of Wax, not a child. */
|
|
parent = parisc_parent(dev);
|
|
if (parent->id.hw_type != HPHW_IOA) {
|
|
gsc_fixup_irqs(parent, wax, wax_choose_irq);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const struct parisc_device_id wax_tbl[] __initconst = {
|
|
{ HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008e },
|
|
{ 0, }
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(parisc, wax_tbl);
|
|
|
|
struct parisc_driver wax_driver __refdata = {
|
|
.name = "wax",
|
|
.id_table = wax_tbl,
|
|
.probe = wax_init_chip,
|
|
};
|