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141 lines
3.1 KiB
C
141 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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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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* (c) 2000-2023 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 "gsc.h"
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#define WAX_GSC_IRQ 7 /* Hardcoded Interrupt for GSC */
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static void wax_choose_irq(struct parisc_device *dev, void *ctrl)
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{
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int irq;
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switch (dev->id.sversion) {
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case 0x73: irq = 1; break; /* i8042 General */
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case 0x8c: irq = 6; break; /* Serial */
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case 0x90: irq = 10; break; /* EISA */
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default: return; /* Unknown */
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}
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gsc_asic_assign_irq(ctrl, irq, &dev->irq);
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switch (dev->id.sversion) {
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case 0x73: irq = 2; break; /* i8042 High-priority */
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case 0x90: irq = 0; break; /* EISA NMI */
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default: return; /* No secondary IRQ */
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}
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gsc_asic_assign_irq(ctrl, irq, &dev->aux_irq);
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}
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static void __init
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wax_init_irq(struct gsc_asic *wax)
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{
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unsigned long base = wax->hpa;
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/* Wax-off */
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gsc_writel(0x00000000, base+OFFSET_IMR);
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/* clear pending interrupts */
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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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}
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static int __init wax_init_chip(struct parisc_device *dev)
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{
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struct gsc_asic *wax;
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struct parisc_device *parent;
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int ret;
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wax = kzalloc(sizeof(*wax), 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.start;
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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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dev->irq = gsc_claim_irq(&wax->gsc_irq, WAX_GSC_IRQ);
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if (dev->irq < 0) {
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printk(KERN_ERR "%s(): cannot get GSC irq\n",
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__func__);
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kfree(wax);
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return -EBUSY;
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}
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wax->eim = ((u32) wax->gsc_irq.txn_addr) | wax->gsc_irq.txn_data;
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ret = request_irq(wax->gsc_irq.irq, gsc_asic_intr, 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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/* 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_setup(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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gsc_fixup_irqs(dev, wax, 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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parent = parisc_parent(dev);
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if (parent->id.hw_type != HPHW_IOA) {
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gsc_fixup_irqs(parent, wax, wax_choose_irq);
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}
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return ret;
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}
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static const struct parisc_device_id wax_tbl[] __initconst = {
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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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static struct parisc_driver wax_driver __refdata = {
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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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static int __init wax_init(void)
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{
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return register_parisc_driver(&wax_driver);
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}
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arch_initcall(wax_init);
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