141 lines
3.2 KiB
C
141 lines
3.2 KiB
C
/*
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* WAX Device Driver
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*
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* (c) Copyright 2000 The Puffin Group Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* by Helge Deller <deller@gmx.de>
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*/
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/ioport.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#include <asm/io.h>
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#include <asm/hardware.h>
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#include <asm/irq.h>
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#include "gsc.h"
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#define WAX_GSC_IRQ 7 /* Hardcoded Interrupt for GSC */
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#define WAX_GSC_NMI_IRQ 29
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static int wax_choose_irq(struct parisc_device *dev)
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{
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int irq = -1;
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switch (dev->id.sversion) {
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case 0x73: irq = 30; break; /* HIL */
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case 0x8c: irq = 25; break; /* RS232 */
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case 0x90: irq = 21; break; /* WAX EISA BA */
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}
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return irq;
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}
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static void __init
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wax_init_irq(struct busdevice *wax)
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{
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unsigned long base = wax->hpa;
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/* Stop WAX barking for a bit */
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gsc_writel(0x00000000, base+OFFSET_IMR);
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/* clear pending interrupts */
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(volatile u32) gsc_readl(base+OFFSET_IRR);
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/* We're not really convinced we want to reset the onboard
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* devices. Firmware does it for us...
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*/
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/* Resets */
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// gsc_writel(0xFFFFFFFF, base+0x1000); /* HIL */
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// gsc_writel(0xFFFFFFFF, base+0x2000); /* RS232-B on Wax */
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/* Ok we hit it on the head with a hammer, our Dog is now
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** comatose and muzzled. Devices will now unmask WAX
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** interrupts as they are registered as irq's in the WAX range.
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*/
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}
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int __init
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wax_init_chip(struct parisc_device *dev)
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{
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struct busdevice *wax;
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struct gsc_irq gsc_irq;
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int irq, ret;
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wax = kmalloc(sizeof(struct busdevice), GFP_KERNEL);
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if (!wax)
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return -ENOMEM;
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wax->name = "Wax";
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wax->hpa = dev->hpa;
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wax->version = 0; /* gsc_readb(wax->hpa+WAX_VER); */
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printk(KERN_INFO "%s at 0x%lx found.\n", wax->name, wax->hpa);
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/* Stop wax hissing for a bit */
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wax_init_irq(wax);
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/* the IRQ wax should use */
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irq = gsc_claim_irq(&gsc_irq, WAX_GSC_IRQ);
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if (irq < 0) {
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printk(KERN_ERR "%s(): cannot get GSC irq\n",
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__FUNCTION__);
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kfree(wax);
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return -EBUSY;
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}
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ret = request_irq(gsc_irq.irq, busdev_barked, 0, "wax", wax);
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if (ret < 0) {
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kfree(wax);
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return ret;
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}
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/* Save this for debugging later */
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wax->parent_irq = gsc_irq.irq;
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wax->eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data;
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/* enable IRQ's for devices below WAX */
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gsc_writel(wax->eim, wax->hpa + OFFSET_IAR);
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/* Done init'ing, register this driver */
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ret = gsc_common_irqsetup(dev, wax);
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if (ret) {
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kfree(wax);
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return ret;
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}
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fixup_child_irqs(dev, wax->busdev_region->data.irqbase,
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wax_choose_irq);
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/* On 715-class machines, Wax EISA is a sibling of Wax, not a child. */
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if (dev->parent->id.hw_type != HPHW_IOA) {
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fixup_child_irqs(dev->parent, wax->busdev_region->data.irqbase,
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wax_choose_irq);
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}
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return ret;
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}
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static struct parisc_device_id wax_tbl[] = {
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{ HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008e },
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{ 0, }
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};
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MODULE_DEVICE_TABLE(parisc, wax_tbl);
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struct parisc_driver wax_driver = {
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.name = "Wax",
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.id_table = wax_tbl,
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.probe = wax_init_chip,
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};
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