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![Thomas Gleixner](/assets/img/avatar_default.png)
Convert to the new function names. Scripted with coccinelle. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: linux-parisc@vger.kernel.org
248 lines
5.6 KiB
C
248 lines
5.6 KiB
C
/*
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* Interrupt management for most GSC and related devices.
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*
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* (c) Copyright 1999 Alex deVries for The Puffin Group
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* (c) Copyright 1999 Grant Grundler for Hewlett-Packard
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* (c) Copyright 1999 Matthew Wilcox
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* (c) Copyright 2000 Helge Deller
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* (c) Copyright 2001 Matthew Wilcox for Hewlett-Packard
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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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#include <linux/bitops.h>
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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/module.h>
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#include <linux/types.h>
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#include <asm/hardware.h>
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#include <asm/io.h>
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#include "gsc.h"
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#undef DEBUG
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#ifdef DEBUG
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#define DEBPRINTK printk
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#else
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#define DEBPRINTK(x,...)
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#endif
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int gsc_alloc_irq(struct gsc_irq *i)
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{
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int irq = txn_alloc_irq(GSC_EIM_WIDTH);
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if (irq < 0) {
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printk("cannot get irq\n");
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return irq;
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}
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i->txn_addr = txn_alloc_addr(irq);
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i->txn_data = txn_alloc_data(irq);
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i->irq = irq;
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return irq;
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}
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int gsc_claim_irq(struct gsc_irq *i, int irq)
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{
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int c = irq;
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irq += CPU_IRQ_BASE; /* virtualize the IRQ first */
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irq = txn_claim_irq(irq);
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if (irq < 0) {
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printk("cannot claim irq %d\n", c);
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return irq;
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}
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i->txn_addr = txn_alloc_addr(irq);
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i->txn_data = txn_alloc_data(irq);
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i->irq = irq;
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return irq;
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}
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EXPORT_SYMBOL(gsc_alloc_irq);
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EXPORT_SYMBOL(gsc_claim_irq);
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/* Common interrupt demultiplexer used by Asp, Lasi & Wax. */
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irqreturn_t gsc_asic_intr(int gsc_asic_irq, void *dev)
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{
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unsigned long irr;
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struct gsc_asic *gsc_asic = dev;
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irr = gsc_readl(gsc_asic->hpa + OFFSET_IRR);
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if (irr == 0)
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return IRQ_NONE;
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DEBPRINTK("%s intr, mask=0x%x\n", gsc_asic->name, irr);
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do {
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int local_irq = __ffs(irr);
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unsigned int irq = gsc_asic->global_irq[local_irq];
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generic_handle_irq(irq);
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irr &= ~(1 << local_irq);
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} while (irr);
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return IRQ_HANDLED;
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}
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int gsc_find_local_irq(unsigned int irq, int *global_irqs, int limit)
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{
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int local_irq;
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for (local_irq = 0; local_irq < limit; local_irq++) {
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if (global_irqs[local_irq] == irq)
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return local_irq;
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}
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return NO_IRQ;
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}
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static void gsc_asic_mask_irq(struct irq_data *d)
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{
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struct gsc_asic *irq_dev = irq_data_get_irq_chip_data(d);
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int local_irq = gsc_find_local_irq(d->irq, irq_dev->global_irq, 32);
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u32 imr;
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DEBPRINTK(KERN_DEBUG "%s(%d) %s: IMR 0x%x\n", __func__, d->irq,
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irq_dev->name, imr);
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/* Disable the IRQ line by clearing the bit in the IMR */
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imr = gsc_readl(irq_dev->hpa + OFFSET_IMR);
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imr &= ~(1 << local_irq);
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gsc_writel(imr, irq_dev->hpa + OFFSET_IMR);
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}
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static void gsc_asic_unmask_irq(struct irq_data *d)
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{
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struct gsc_asic *irq_dev = irq_data_get_irq_chip_data(d);
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int local_irq = gsc_find_local_irq(d->irq, irq_dev->global_irq, 32);
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u32 imr;
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DEBPRINTK(KERN_DEBUG "%s(%d) %s: IMR 0x%x\n", __func__, d->irq,
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irq_dev->name, imr);
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/* Enable the IRQ line by setting the bit in the IMR */
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imr = gsc_readl(irq_dev->hpa + OFFSET_IMR);
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imr |= 1 << local_irq;
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gsc_writel(imr, irq_dev->hpa + OFFSET_IMR);
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/*
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* FIXME: read IPR to make sure the IRQ isn't already pending.
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* If so, we need to read IRR and manually call do_irq().
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*/
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}
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static struct irq_chip gsc_asic_interrupt_type = {
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.name = "GSC-ASIC",
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.irq_unmask = gsc_asic_unmask_irq,
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.irq_mask = gsc_asic_mask_irq,
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};
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int gsc_assign_irq(struct irq_chip *type, void *data)
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{
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static int irq = GSC_IRQ_BASE;
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if (irq > GSC_IRQ_MAX)
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return NO_IRQ;
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irq_set_chip_and_handler(irq, type, handle_simple_irq);
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irq_set_chip_data(irq, data);
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return irq++;
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}
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void gsc_asic_assign_irq(struct gsc_asic *asic, int local_irq, int *irqp)
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{
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int irq = asic->global_irq[local_irq];
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if (irq <= 0) {
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irq = gsc_assign_irq(&gsc_asic_interrupt_type, asic);
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if (irq == NO_IRQ)
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return;
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asic->global_irq[local_irq] = irq;
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}
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*irqp = irq;
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}
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struct gsc_fixup_struct {
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void (*choose_irq)(struct parisc_device *, void *);
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void *ctrl;
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};
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static int gsc_fixup_irqs_callback(struct device *dev, void *data)
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{
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struct parisc_device *padev = to_parisc_device(dev);
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struct gsc_fixup_struct *gf = data;
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/* work-around for 715/64 and others which have parent
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at path [5] and children at path [5/0/x] */
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if (padev->id.hw_type == HPHW_FAULTY)
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gsc_fixup_irqs(padev, gf->ctrl, gf->choose_irq);
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gf->choose_irq(padev, gf->ctrl);
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return 0;
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}
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void gsc_fixup_irqs(struct parisc_device *parent, void *ctrl,
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void (*choose_irq)(struct parisc_device *, void *))
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{
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struct gsc_fixup_struct data = {
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.choose_irq = choose_irq,
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.ctrl = ctrl,
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};
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device_for_each_child(&parent->dev, &data, gsc_fixup_irqs_callback);
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}
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int gsc_common_setup(struct parisc_device *parent, struct gsc_asic *gsc_asic)
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{
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struct resource *res;
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int i;
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gsc_asic->gsc = parent;
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/* Initialise local irq -> global irq mapping */
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for (i = 0; i < 32; i++) {
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gsc_asic->global_irq[i] = NO_IRQ;
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}
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/* allocate resource region */
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res = request_mem_region(gsc_asic->hpa, 0x100000, gsc_asic->name);
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if (res) {
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res->flags = IORESOURCE_MEM; /* do not mark it busy ! */
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}
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#if 0
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printk(KERN_WARNING "%s IRQ %d EIM 0x%x", gsc_asic->name,
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parent->irq, gsc_asic->eim);
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if (gsc_readl(gsc_asic->hpa + OFFSET_IMR))
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printk(" IMR is non-zero! (0x%x)",
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gsc_readl(gsc_asic->hpa + OFFSET_IMR));
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printk("\n");
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#endif
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return 0;
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}
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extern struct parisc_driver lasi_driver;
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extern struct parisc_driver asp_driver;
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extern struct parisc_driver wax_driver;
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void __init gsc_init(void)
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{
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#ifdef CONFIG_GSC_LASI
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register_parisc_driver(&lasi_driver);
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register_parisc_driver(&asp_driver);
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#endif
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#ifdef CONFIG_GSC_WAX
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register_parisc_driver(&wax_driver);
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#endif
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}
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