![Haojian Zhuang](/assets/img/avatar_default.png)
While supporting board in non-DT mode, icu_data[i]->cascade_irq isn't assigned with correct value. Signed-off-by: Haojian Zhuang <haojian.zhuang@gmail.com>
466 lines
12 KiB
C
466 lines
12 KiB
C
/*
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* linux/arch/arm/mach-mmp/irq.c
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*
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* Generic IRQ handling, GPIO IRQ demultiplexing, etc.
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* Copyright (C) 2008 - 2012 Marvell Technology Group Ltd.
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*
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* Author: Bin Yang <bin.yang@marvell.com>
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* Haojian Zhuang <haojian.zhuang@gmail.com>
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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 version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/irq.h>
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#include <linux/irqdomain.h>
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#include <linux/io.h>
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#include <linux/ioport.h>
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#include <linux/of_address.h>
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#include <linux/of_irq.h>
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#include <mach/irqs.h>
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#ifdef CONFIG_CPU_MMP2
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#include <mach/pm-mmp2.h>
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#endif
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#ifdef CONFIG_CPU_PXA910
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#include <mach/pm-pxa910.h>
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#endif
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#include "common.h"
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#define MAX_ICU_NR 16
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struct icu_chip_data {
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int nr_irqs;
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unsigned int virq_base;
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unsigned int cascade_irq;
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void __iomem *reg_status;
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void __iomem *reg_mask;
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unsigned int conf_enable;
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unsigned int conf_disable;
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unsigned int conf_mask;
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unsigned int clr_mfp_irq_base;
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unsigned int clr_mfp_hwirq;
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struct irq_domain *domain;
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};
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struct mmp_intc_conf {
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unsigned int conf_enable;
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unsigned int conf_disable;
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unsigned int conf_mask;
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};
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void __iomem *mmp_icu_base;
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static struct icu_chip_data icu_data[MAX_ICU_NR];
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static int max_icu_nr;
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extern void mmp2_clear_pmic_int(void);
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static void icu_mask_ack_irq(struct irq_data *d)
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{
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struct irq_domain *domain = d->domain;
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struct icu_chip_data *data = (struct icu_chip_data *)domain->host_data;
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int hwirq;
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u32 r;
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hwirq = d->irq - data->virq_base;
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if (data == &icu_data[0]) {
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r = readl_relaxed(mmp_icu_base + (hwirq << 2));
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r &= ~data->conf_mask;
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r |= data->conf_disable;
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writel_relaxed(r, mmp_icu_base + (hwirq << 2));
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} else {
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#ifdef CONFIG_CPU_MMP2
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if ((data->virq_base == data->clr_mfp_irq_base)
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&& (hwirq == data->clr_mfp_hwirq))
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mmp2_clear_pmic_int();
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#endif
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r = readl_relaxed(data->reg_mask) | (1 << hwirq);
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writel_relaxed(r, data->reg_mask);
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}
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}
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static void icu_mask_irq(struct irq_data *d)
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{
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struct irq_domain *domain = d->domain;
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struct icu_chip_data *data = (struct icu_chip_data *)domain->host_data;
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int hwirq;
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u32 r;
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hwirq = d->irq - data->virq_base;
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if (data == &icu_data[0]) {
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r = readl_relaxed(mmp_icu_base + (hwirq << 2));
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r &= ~data->conf_mask;
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r |= data->conf_disable;
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writel_relaxed(r, mmp_icu_base + (hwirq << 2));
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} else {
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r = readl_relaxed(data->reg_mask) | (1 << hwirq);
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writel_relaxed(r, data->reg_mask);
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}
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}
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static void icu_unmask_irq(struct irq_data *d)
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{
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struct irq_domain *domain = d->domain;
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struct icu_chip_data *data = (struct icu_chip_data *)domain->host_data;
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int hwirq;
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u32 r;
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hwirq = d->irq - data->virq_base;
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if (data == &icu_data[0]) {
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r = readl_relaxed(mmp_icu_base + (hwirq << 2));
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r &= ~data->conf_mask;
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r |= data->conf_enable;
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writel_relaxed(r, mmp_icu_base + (hwirq << 2));
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} else {
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r = readl_relaxed(data->reg_mask) & ~(1 << hwirq);
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writel_relaxed(r, data->reg_mask);
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}
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}
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static struct irq_chip icu_irq_chip = {
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.name = "icu_irq",
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.irq_mask = icu_mask_irq,
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.irq_mask_ack = icu_mask_ack_irq,
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.irq_unmask = icu_unmask_irq,
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};
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static void icu_mux_irq_demux(unsigned int irq, struct irq_desc *desc)
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{
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struct irq_domain *domain;
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struct icu_chip_data *data;
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int i;
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unsigned long mask, status, n;
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for (i = 1; i < max_icu_nr; i++) {
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if (irq == icu_data[i].cascade_irq) {
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domain = icu_data[i].domain;
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data = (struct icu_chip_data *)domain->host_data;
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break;
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}
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}
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if (i >= max_icu_nr) {
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pr_err("Spurious irq %d in MMP INTC\n", irq);
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return;
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}
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mask = readl_relaxed(data->reg_mask);
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while (1) {
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status = readl_relaxed(data->reg_status) & ~mask;
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if (status == 0)
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break;
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n = find_first_bit(&status, BITS_PER_LONG);
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while (n < BITS_PER_LONG) {
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generic_handle_irq(icu_data[i].virq_base + n);
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n = find_next_bit(&status, BITS_PER_LONG, n + 1);
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}
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}
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}
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static int mmp_irq_domain_map(struct irq_domain *d, unsigned int irq,
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irq_hw_number_t hw)
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{
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irq_set_chip_and_handler(irq, &icu_irq_chip, handle_level_irq);
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set_irq_flags(irq, IRQF_VALID);
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return 0;
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}
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static int mmp_irq_domain_xlate(struct irq_domain *d, struct device_node *node,
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const u32 *intspec, unsigned int intsize,
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unsigned long *out_hwirq,
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unsigned int *out_type)
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{
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*out_hwirq = intspec[0];
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return 0;
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}
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const struct irq_domain_ops mmp_irq_domain_ops = {
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.map = mmp_irq_domain_map,
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.xlate = mmp_irq_domain_xlate,
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};
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static struct mmp_intc_conf mmp_conf = {
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.conf_enable = 0x51,
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.conf_disable = 0x0,
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.conf_mask = 0x7f,
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};
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static struct mmp_intc_conf mmp2_conf = {
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.conf_enable = 0x20,
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.conf_disable = 0x0,
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.conf_mask = 0x7f,
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};
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/* MMP (ARMv5) */
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void __init icu_init_irq(void)
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{
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int irq;
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max_icu_nr = 1;
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mmp_icu_base = ioremap(0xd4282000, 0x1000);
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icu_data[0].conf_enable = mmp_conf.conf_enable;
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icu_data[0].conf_disable = mmp_conf.conf_disable;
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icu_data[0].conf_mask = mmp_conf.conf_mask;
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icu_data[0].nr_irqs = 64;
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icu_data[0].virq_base = 0;
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icu_data[0].domain = irq_domain_add_legacy(NULL, 64, 0, 0,
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&irq_domain_simple_ops,
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&icu_data[0]);
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for (irq = 0; irq < 64; irq++) {
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icu_mask_irq(irq_get_irq_data(irq));
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irq_set_chip_and_handler(irq, &icu_irq_chip, handle_level_irq);
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set_irq_flags(irq, IRQF_VALID);
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}
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irq_set_default_host(icu_data[0].domain);
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#ifdef CONFIG_CPU_PXA910
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icu_irq_chip.irq_set_wake = pxa910_set_wake;
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#endif
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}
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/* MMP2 (ARMv7) */
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void __init mmp2_init_icu(void)
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{
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int irq;
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max_icu_nr = 8;
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mmp_icu_base = ioremap(0xd4282000, 0x1000);
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icu_data[0].conf_enable = mmp2_conf.conf_enable;
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icu_data[0].conf_disable = mmp2_conf.conf_disable;
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icu_data[0].conf_mask = mmp2_conf.conf_mask;
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icu_data[0].nr_irqs = 64;
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icu_data[0].virq_base = 0;
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icu_data[0].domain = irq_domain_add_legacy(NULL, 64, 0, 0,
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&irq_domain_simple_ops,
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&icu_data[0]);
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icu_data[1].reg_status = mmp_icu_base + 0x150;
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icu_data[1].reg_mask = mmp_icu_base + 0x168;
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icu_data[1].clr_mfp_irq_base = IRQ_MMP2_PMIC_BASE;
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icu_data[1].clr_mfp_hwirq = IRQ_MMP2_PMIC - IRQ_MMP2_PMIC_BASE;
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icu_data[1].nr_irqs = 2;
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icu_data[1].cascade_irq = 4;
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icu_data[1].virq_base = IRQ_MMP2_PMIC_BASE;
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icu_data[1].domain = irq_domain_add_legacy(NULL, icu_data[1].nr_irqs,
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icu_data[1].virq_base, 0,
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&irq_domain_simple_ops,
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&icu_data[1]);
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icu_data[2].reg_status = mmp_icu_base + 0x154;
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icu_data[2].reg_mask = mmp_icu_base + 0x16c;
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icu_data[2].nr_irqs = 2;
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icu_data[2].cascade_irq = 5;
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icu_data[2].virq_base = IRQ_MMP2_RTC_BASE;
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icu_data[2].domain = irq_domain_add_legacy(NULL, icu_data[2].nr_irqs,
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icu_data[2].virq_base, 0,
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&irq_domain_simple_ops,
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&icu_data[2]);
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icu_data[3].reg_status = mmp_icu_base + 0x180;
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icu_data[3].reg_mask = mmp_icu_base + 0x17c;
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icu_data[3].nr_irqs = 3;
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icu_data[3].cascade_irq = 9;
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icu_data[3].virq_base = IRQ_MMP2_KEYPAD_BASE;
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icu_data[3].domain = irq_domain_add_legacy(NULL, icu_data[3].nr_irqs,
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icu_data[3].virq_base, 0,
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&irq_domain_simple_ops,
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&icu_data[3]);
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icu_data[4].reg_status = mmp_icu_base + 0x158;
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icu_data[4].reg_mask = mmp_icu_base + 0x170;
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icu_data[4].nr_irqs = 5;
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icu_data[4].cascade_irq = 17;
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icu_data[4].virq_base = IRQ_MMP2_TWSI_BASE;
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icu_data[4].domain = irq_domain_add_legacy(NULL, icu_data[4].nr_irqs,
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icu_data[4].virq_base, 0,
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&irq_domain_simple_ops,
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&icu_data[4]);
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icu_data[5].reg_status = mmp_icu_base + 0x15c;
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icu_data[5].reg_mask = mmp_icu_base + 0x174;
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icu_data[5].nr_irqs = 15;
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icu_data[5].cascade_irq = 35;
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icu_data[5].virq_base = IRQ_MMP2_MISC_BASE;
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icu_data[5].domain = irq_domain_add_legacy(NULL, icu_data[5].nr_irqs,
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icu_data[5].virq_base, 0,
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&irq_domain_simple_ops,
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&icu_data[5]);
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icu_data[6].reg_status = mmp_icu_base + 0x160;
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icu_data[6].reg_mask = mmp_icu_base + 0x178;
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icu_data[6].nr_irqs = 2;
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icu_data[6].cascade_irq = 51;
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icu_data[6].virq_base = IRQ_MMP2_MIPI_HSI1_BASE;
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icu_data[6].domain = irq_domain_add_legacy(NULL, icu_data[6].nr_irqs,
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icu_data[6].virq_base, 0,
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&irq_domain_simple_ops,
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&icu_data[6]);
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icu_data[7].reg_status = mmp_icu_base + 0x188;
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icu_data[7].reg_mask = mmp_icu_base + 0x184;
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icu_data[7].nr_irqs = 2;
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icu_data[7].cascade_irq = 55;
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icu_data[7].virq_base = IRQ_MMP2_MIPI_HSI0_BASE;
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icu_data[7].domain = irq_domain_add_legacy(NULL, icu_data[7].nr_irqs,
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icu_data[7].virq_base, 0,
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&irq_domain_simple_ops,
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&icu_data[7]);
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for (irq = 0; irq < IRQ_MMP2_MUX_END; irq++) {
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icu_mask_irq(irq_get_irq_data(irq));
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switch (irq) {
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case IRQ_MMP2_PMIC_MUX:
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case IRQ_MMP2_RTC_MUX:
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case IRQ_MMP2_KEYPAD_MUX:
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case IRQ_MMP2_TWSI_MUX:
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case IRQ_MMP2_MISC_MUX:
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case IRQ_MMP2_MIPI_HSI1_MUX:
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case IRQ_MMP2_MIPI_HSI0_MUX:
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irq_set_chip(irq, &icu_irq_chip);
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irq_set_chained_handler(irq, icu_mux_irq_demux);
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break;
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default:
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irq_set_chip_and_handler(irq, &icu_irq_chip,
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handle_level_irq);
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break;
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}
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set_irq_flags(irq, IRQF_VALID);
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}
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irq_set_default_host(icu_data[0].domain);
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#ifdef CONFIG_CPU_MMP2
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icu_irq_chip.irq_set_wake = mmp2_set_wake;
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#endif
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}
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#ifdef CONFIG_OF
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static const struct of_device_id intc_ids[] __initconst = {
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{ .compatible = "mrvl,mmp-intc", .data = &mmp_conf },
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{ .compatible = "mrvl,mmp2-intc", .data = &mmp2_conf },
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{}
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};
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static const struct of_device_id mmp_mux_irq_match[] __initconst = {
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{ .compatible = "mrvl,mmp2-mux-intc" },
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{}
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};
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int __init mmp2_mux_init(struct device_node *parent)
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{
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struct device_node *node;
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const struct of_device_id *of_id;
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struct resource res;
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int i, irq_base, ret, irq;
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u32 nr_irqs, mfp_irq;
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node = parent;
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max_icu_nr = 1;
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for (i = 1; i < MAX_ICU_NR; i++) {
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node = of_find_matching_node(node, mmp_mux_irq_match);
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if (!node)
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break;
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of_id = of_match_node(&mmp_mux_irq_match[0], node);
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ret = of_property_read_u32(node, "mrvl,intc-nr-irqs",
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&nr_irqs);
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if (ret) {
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pr_err("Not found mrvl,intc-nr-irqs property\n");
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ret = -EINVAL;
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goto err;
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}
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ret = of_address_to_resource(node, 0, &res);
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if (ret < 0) {
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pr_err("Not found reg property\n");
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ret = -EINVAL;
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goto err;
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}
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icu_data[i].reg_status = mmp_icu_base + res.start;
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ret = of_address_to_resource(node, 1, &res);
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if (ret < 0) {
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pr_err("Not found reg property\n");
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ret = -EINVAL;
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goto err;
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}
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icu_data[i].reg_mask = mmp_icu_base + res.start;
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icu_data[i].cascade_irq = irq_of_parse_and_map(node, 0);
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if (!icu_data[i].cascade_irq) {
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ret = -EINVAL;
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goto err;
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}
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irq_base = irq_alloc_descs(-1, 0, nr_irqs, 0);
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if (irq_base < 0) {
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pr_err("Failed to allocate IRQ numbers for mux intc\n");
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ret = irq_base;
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goto err;
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}
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if (!of_property_read_u32(node, "mrvl,clr-mfp-irq",
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&mfp_irq)) {
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icu_data[i].clr_mfp_irq_base = irq_base;
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icu_data[i].clr_mfp_hwirq = mfp_irq;
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}
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irq_set_chained_handler(icu_data[i].cascade_irq,
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icu_mux_irq_demux);
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icu_data[i].nr_irqs = nr_irqs;
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icu_data[i].virq_base = irq_base;
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icu_data[i].domain = irq_domain_add_legacy(node, nr_irqs,
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irq_base, 0,
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&mmp_irq_domain_ops,
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&icu_data[i]);
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for (irq = irq_base; irq < irq_base + nr_irqs; irq++)
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icu_mask_irq(irq_get_irq_data(irq));
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}
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max_icu_nr = i;
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return 0;
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err:
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of_node_put(node);
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max_icu_nr = i;
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return ret;
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}
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void __init mmp_dt_irq_init(void)
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{
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struct device_node *node;
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const struct of_device_id *of_id;
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struct mmp_intc_conf *conf;
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int nr_irqs, irq_base, ret, irq;
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node = of_find_matching_node(NULL, intc_ids);
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if (!node) {
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pr_err("Failed to find interrupt controller in arch-mmp\n");
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return;
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}
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of_id = of_match_node(intc_ids, node);
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conf = of_id->data;
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ret = of_property_read_u32(node, "mrvl,intc-nr-irqs", &nr_irqs);
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|
if (ret) {
|
|
pr_err("Not found mrvl,intc-nr-irqs property\n");
|
|
return;
|
|
}
|
|
|
|
mmp_icu_base = of_iomap(node, 0);
|
|
if (!mmp_icu_base) {
|
|
pr_err("Failed to get interrupt controller register\n");
|
|
return;
|
|
}
|
|
|
|
irq_base = irq_alloc_descs(-1, 0, nr_irqs - NR_IRQS_LEGACY, 0);
|
|
if (irq_base < 0) {
|
|
pr_err("Failed to allocate IRQ numbers\n");
|
|
goto err;
|
|
} else if (irq_base != NR_IRQS_LEGACY) {
|
|
pr_err("ICU's irqbase should be started from 0\n");
|
|
goto err;
|
|
}
|
|
icu_data[0].conf_enable = conf->conf_enable;
|
|
icu_data[0].conf_disable = conf->conf_disable;
|
|
icu_data[0].conf_mask = conf->conf_mask;
|
|
icu_data[0].nr_irqs = nr_irqs;
|
|
icu_data[0].virq_base = 0;
|
|
icu_data[0].domain = irq_domain_add_legacy(node, nr_irqs, 0, 0,
|
|
&mmp_irq_domain_ops,
|
|
&icu_data[0]);
|
|
irq_set_default_host(icu_data[0].domain);
|
|
for (irq = 0; irq < nr_irqs; irq++)
|
|
icu_mask_irq(irq_get_irq_data(irq));
|
|
mmp2_mux_init(node);
|
|
return;
|
|
err:
|
|
iounmap(mmp_icu_base);
|
|
}
|
|
#endif
|