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drivers/irqchip/irq-mmp.c
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/* * linux/arch/arm/mach-mmp/irq.c * * Generic IRQ handling, GPIO IRQ demultiplexing, etc. * Copyright (C) 2008 - 2012 Marvell Technology Group Ltd. * * Author: Bin Yang <bin.yang@marvell.com> * Haojian Zhuang <haojian.zhuang@gmail.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include <linux/module.h> #include <linux/init.h> #include <linux/irq.h> |
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#include <linux/irqchip.h> |
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#include <linux/irqdomain.h> #include <linux/io.h> #include <linux/ioport.h> #include <linux/of_address.h> #include <linux/of_irq.h> |
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#include <asm/exception.h> |
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#include <asm/hardirq.h> |
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|
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#define MAX_ICU_NR 16 |
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#define PJ1_INT_SEL 0x10c #define PJ4_INT_SEL 0x104 /* bit fields in PJ1_INT_SEL and PJ4_INT_SEL */ #define SEL_INT_PENDING (1 << 6) #define SEL_INT_NUM_MASK 0x3f |
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#define MMP2_ICU_INT_ROUTE_PJ4_IRQ (1 << 5) #define MMP2_ICU_INT_ROUTE_PJ4_FIQ (1 << 6) |
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struct icu_chip_data { int nr_irqs; unsigned int virq_base; unsigned int cascade_irq; void __iomem *reg_status; void __iomem *reg_mask; unsigned int conf_enable; unsigned int conf_disable; unsigned int conf_mask; unsigned int clr_mfp_irq_base; unsigned int clr_mfp_hwirq; struct irq_domain *domain; }; struct mmp_intc_conf { unsigned int conf_enable; unsigned int conf_disable; unsigned int conf_mask; }; |
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static void __iomem *mmp_icu_base; |
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static struct icu_chip_data icu_data[MAX_ICU_NR]; static int max_icu_nr; extern void mmp2_clear_pmic_int(void); static void icu_mask_ack_irq(struct irq_data *d) { struct irq_domain *domain = d->domain; struct icu_chip_data *data = (struct icu_chip_data *)domain->host_data; int hwirq; u32 r; hwirq = d->irq - data->virq_base; if (data == &icu_data[0]) { r = readl_relaxed(mmp_icu_base + (hwirq << 2)); r &= ~data->conf_mask; r |= data->conf_disable; writel_relaxed(r, mmp_icu_base + (hwirq << 2)); } else { #ifdef CONFIG_CPU_MMP2 if ((data->virq_base == data->clr_mfp_irq_base) && (hwirq == data->clr_mfp_hwirq)) mmp2_clear_pmic_int(); #endif r = readl_relaxed(data->reg_mask) | (1 << hwirq); writel_relaxed(r, data->reg_mask); } } static void icu_mask_irq(struct irq_data *d) { struct irq_domain *domain = d->domain; struct icu_chip_data *data = (struct icu_chip_data *)domain->host_data; int hwirq; u32 r; hwirq = d->irq - data->virq_base; if (data == &icu_data[0]) { r = readl_relaxed(mmp_icu_base + (hwirq << 2)); r &= ~data->conf_mask; r |= data->conf_disable; writel_relaxed(r, mmp_icu_base + (hwirq << 2)); } else { r = readl_relaxed(data->reg_mask) | (1 << hwirq); writel_relaxed(r, data->reg_mask); } } static void icu_unmask_irq(struct irq_data *d) { struct irq_domain *domain = d->domain; struct icu_chip_data *data = (struct icu_chip_data *)domain->host_data; int hwirq; u32 r; hwirq = d->irq - data->virq_base; if (data == &icu_data[0]) { r = readl_relaxed(mmp_icu_base + (hwirq << 2)); r &= ~data->conf_mask; r |= data->conf_enable; writel_relaxed(r, mmp_icu_base + (hwirq << 2)); } else { r = readl_relaxed(data->reg_mask) & ~(1 << hwirq); writel_relaxed(r, data->reg_mask); } } |
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struct irq_chip icu_irq_chip = { |
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.name = "icu_irq", .irq_mask = icu_mask_irq, .irq_mask_ack = icu_mask_ack_irq, .irq_unmask = icu_unmask_irq, }; |
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static void icu_mux_irq_demux(struct irq_desc *desc) |
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{ |
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unsigned int irq = irq_desc_get_irq(desc); |
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struct irq_domain *domain; struct icu_chip_data *data; int i; unsigned long mask, status, n; for (i = 1; i < max_icu_nr; i++) { if (irq == icu_data[i].cascade_irq) { domain = icu_data[i].domain; data = (struct icu_chip_data *)domain->host_data; break; } } if (i >= max_icu_nr) { pr_err("Spurious irq %d in MMP INTC ", irq); return; } mask = readl_relaxed(data->reg_mask); while (1) { status = readl_relaxed(data->reg_status) & ~mask; if (status == 0) break; |
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for_each_set_bit(n, &status, BITS_PER_LONG) { |
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generic_handle_irq(icu_data[i].virq_base + n); |
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} } } static int mmp_irq_domain_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hw) { irq_set_chip_and_handler(irq, &icu_irq_chip, handle_level_irq); |
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return 0; } static int mmp_irq_domain_xlate(struct irq_domain *d, struct device_node *node, const u32 *intspec, unsigned int intsize, unsigned long *out_hwirq, unsigned int *out_type) { *out_hwirq = intspec[0]; return 0; } const struct irq_domain_ops mmp_irq_domain_ops = { .map = mmp_irq_domain_map, .xlate = mmp_irq_domain_xlate, }; |
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static const struct mmp_intc_conf mmp_conf = { |
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.conf_enable = 0x51, .conf_disable = 0x0, .conf_mask = 0x7f, }; |
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static const struct mmp_intc_conf mmp2_conf = { |
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.conf_enable = 0x20, .conf_disable = 0x0, |
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.conf_mask = MMP2_ICU_INT_ROUTE_PJ4_IRQ | MMP2_ICU_INT_ROUTE_PJ4_FIQ, |
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}; |
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static void __exception_irq_entry mmp_handle_irq(struct pt_regs *regs) |
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{ |
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int hwirq; |
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hwirq = readl_relaxed(mmp_icu_base + PJ1_INT_SEL); if (!(hwirq & SEL_INT_PENDING)) return; hwirq &= SEL_INT_NUM_MASK; |
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handle_domain_irq(icu_data[0].domain, hwirq, regs); |
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} |
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static void __exception_irq_entry mmp2_handle_irq(struct pt_regs *regs) |
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{ |
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int hwirq; |
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hwirq = readl_relaxed(mmp_icu_base + PJ4_INT_SEL); if (!(hwirq & SEL_INT_PENDING)) return; hwirq &= SEL_INT_NUM_MASK; |
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handle_domain_irq(icu_data[0].domain, hwirq, regs); |
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} |
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/* MMP (ARMv5) */ void __init icu_init_irq(void) { int irq; max_icu_nr = 1; mmp_icu_base = ioremap(0xd4282000, 0x1000); icu_data[0].conf_enable = mmp_conf.conf_enable; icu_data[0].conf_disable = mmp_conf.conf_disable; icu_data[0].conf_mask = mmp_conf.conf_mask; icu_data[0].nr_irqs = 64; icu_data[0].virq_base = 0; icu_data[0].domain = irq_domain_add_legacy(NULL, 64, 0, 0, &irq_domain_simple_ops, &icu_data[0]); for (irq = 0; irq < 64; irq++) { icu_mask_irq(irq_get_irq_data(irq)); irq_set_chip_and_handler(irq, &icu_irq_chip, handle_level_irq); |
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} irq_set_default_host(icu_data[0].domain); |
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set_handle_irq(mmp_handle_irq); |
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} /* MMP2 (ARMv7) */ void __init mmp2_init_icu(void) { |
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int irq, end; |
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max_icu_nr = 8; mmp_icu_base = ioremap(0xd4282000, 0x1000); icu_data[0].conf_enable = mmp2_conf.conf_enable; icu_data[0].conf_disable = mmp2_conf.conf_disable; icu_data[0].conf_mask = mmp2_conf.conf_mask; icu_data[0].nr_irqs = 64; icu_data[0].virq_base = 0; icu_data[0].domain = irq_domain_add_legacy(NULL, 64, 0, 0, &irq_domain_simple_ops, &icu_data[0]); icu_data[1].reg_status = mmp_icu_base + 0x150; icu_data[1].reg_mask = mmp_icu_base + 0x168; |
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icu_data[1].clr_mfp_irq_base = icu_data[0].virq_base + icu_data[0].nr_irqs; icu_data[1].clr_mfp_hwirq = 1; /* offset to 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 = icu_data[0].virq_base + icu_data[0].nr_irqs; |
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icu_data[1].domain = irq_domain_add_legacy(NULL, icu_data[1].nr_irqs, icu_data[1].virq_base, 0, &irq_domain_simple_ops, &icu_data[1]); icu_data[2].reg_status = mmp_icu_base + 0x154; icu_data[2].reg_mask = mmp_icu_base + 0x16c; 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 = icu_data[1].virq_base + icu_data[1].nr_irqs; |
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icu_data[2].domain = irq_domain_add_legacy(NULL, icu_data[2].nr_irqs, icu_data[2].virq_base, 0, &irq_domain_simple_ops, &icu_data[2]); icu_data[3].reg_status = mmp_icu_base + 0x180; icu_data[3].reg_mask = mmp_icu_base + 0x17c; 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 = icu_data[2].virq_base + icu_data[2].nr_irqs; |
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icu_data[3].domain = irq_domain_add_legacy(NULL, icu_data[3].nr_irqs, icu_data[3].virq_base, 0, &irq_domain_simple_ops, &icu_data[3]); icu_data[4].reg_status = mmp_icu_base + 0x158; icu_data[4].reg_mask = mmp_icu_base + 0x170; 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 = icu_data[3].virq_base + icu_data[3].nr_irqs; |
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icu_data[4].domain = irq_domain_add_legacy(NULL, icu_data[4].nr_irqs, icu_data[4].virq_base, 0, &irq_domain_simple_ops, &icu_data[4]); icu_data[5].reg_status = mmp_icu_base + 0x15c; icu_data[5].reg_mask = mmp_icu_base + 0x174; 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 = icu_data[4].virq_base + icu_data[4].nr_irqs; |
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icu_data[5].domain = irq_domain_add_legacy(NULL, icu_data[5].nr_irqs, icu_data[5].virq_base, 0, &irq_domain_simple_ops, &icu_data[5]); icu_data[6].reg_status = mmp_icu_base + 0x160; icu_data[6].reg_mask = mmp_icu_base + 0x178; 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 = icu_data[5].virq_base + icu_data[5].nr_irqs; |
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icu_data[6].domain = irq_domain_add_legacy(NULL, icu_data[6].nr_irqs, icu_data[6].virq_base, 0, &irq_domain_simple_ops, &icu_data[6]); icu_data[7].reg_status = mmp_icu_base + 0x188; icu_data[7].reg_mask = mmp_icu_base + 0x184; 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 = icu_data[6].virq_base + icu_data[6].nr_irqs; |
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icu_data[7].domain = irq_domain_add_legacy(NULL, icu_data[7].nr_irqs, icu_data[7].virq_base, 0, &irq_domain_simple_ops, &icu_data[7]); |
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end = icu_data[7].virq_base + icu_data[7].nr_irqs; for (irq = 0; irq < end; irq++) { |
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icu_mask_irq(irq_get_irq_data(irq)); |
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if (irq == icu_data[1].cascade_irq || irq == icu_data[2].cascade_irq || irq == icu_data[3].cascade_irq || irq == icu_data[4].cascade_irq || irq == icu_data[5].cascade_irq || irq == icu_data[6].cascade_irq || irq == icu_data[7].cascade_irq) { |
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irq_set_chip(irq, &icu_irq_chip); irq_set_chained_handler(irq, icu_mux_irq_demux); |
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} else { |
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irq_set_chip_and_handler(irq, &icu_irq_chip, handle_level_irq); |
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} |
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} irq_set_default_host(icu_data[0].domain); |
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set_handle_irq(mmp2_handle_irq); |
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} #ifdef CONFIG_OF |
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static int __init mmp_init_bases(struct device_node *node) |
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{ |
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int ret, nr_irqs, irq, i = 0; |
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|
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ret = of_property_read_u32(node, "mrvl,intc-nr-irqs", &nr_irqs); if (ret) { pr_err("Not found mrvl,intc-nr-irqs property "); return ret; } |
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|
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mmp_icu_base = of_iomap(node, 0); if (!mmp_icu_base) { pr_err("Failed to get interrupt controller register "); return -ENOMEM; } icu_data[0].virq_base = 0; icu_data[0].domain = irq_domain_add_linear(node, nr_irqs, &mmp_irq_domain_ops, &icu_data[0]); for (irq = 0; irq < nr_irqs; irq++) { ret = irq_create_mapping(icu_data[0].domain, irq); if (!ret) { pr_err("Failed to mapping hwirq "); |
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goto err; } |
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if (!irq) icu_data[0].virq_base = ret; |
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} |
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icu_data[0].nr_irqs = nr_irqs; |
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return 0; err: |
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if (icu_data[0].virq_base) { for (i = 0; i < irq; i++) irq_dispose_mapping(icu_data[0].virq_base + i); } irq_domain_remove(icu_data[0].domain); iounmap(mmp_icu_base); return -EINVAL; |
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} |
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static int __init mmp_of_init(struct device_node *node, struct device_node *parent) |
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{ |
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int ret; |
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|
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ret = mmp_init_bases(node); if (ret < 0) return ret; icu_data[0].conf_enable = mmp_conf.conf_enable; icu_data[0].conf_disable = mmp_conf.conf_disable; icu_data[0].conf_mask = mmp_conf.conf_mask; irq_set_default_host(icu_data[0].domain); set_handle_irq(mmp_handle_irq); max_icu_nr = 1; return 0; } IRQCHIP_DECLARE(mmp_intc, "mrvl,mmp-intc", mmp_of_init); static int __init mmp2_of_init(struct device_node *node, struct device_node *parent) { int ret; ret = mmp_init_bases(node); if (ret < 0) return ret; icu_data[0].conf_enable = mmp2_conf.conf_enable; icu_data[0].conf_disable = mmp2_conf.conf_disable; icu_data[0].conf_mask = mmp2_conf.conf_mask; irq_set_default_host(icu_data[0].domain); set_handle_irq(mmp2_handle_irq); max_icu_nr = 1; return 0; } IRQCHIP_DECLARE(mmp2_intc, "mrvl,mmp2-intc", mmp2_of_init); static int __init mmp2_mux_of_init(struct device_node *node, struct device_node *parent) { struct resource res; int i, ret, irq, j = 0; u32 nr_irqs, mfp_irq; if (!parent) return -ENODEV; i = max_icu_nr; 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 "); |
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return -EINVAL; |
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} |
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ret = of_address_to_resource(node, 0, &res); if (ret < 0) { pr_err("Not found reg property "); return -EINVAL; |
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} |
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icu_data[i].reg_status = mmp_icu_base + res.start; ret = of_address_to_resource(node, 1, &res); if (ret < 0) { pr_err("Not found reg property "); return -EINVAL; |
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} |
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icu_data[i].reg_mask = mmp_icu_base + res.start; icu_data[i].cascade_irq = irq_of_parse_and_map(node, 0); if (!icu_data[i].cascade_irq) return -EINVAL; icu_data[i].virq_base = 0; icu_data[i].domain = irq_domain_add_linear(node, nr_irqs, |
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&mmp_irq_domain_ops, |
0f374561b irqchip: mmp: sup... |
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&icu_data[i]); for (irq = 0; irq < nr_irqs; irq++) { ret = irq_create_mapping(icu_data[i].domain, irq); if (!ret) { pr_err("Failed to mapping hwirq "); goto err; } if (!irq) icu_data[i].virq_base = ret; } icu_data[i].nr_irqs = nr_irqs; if (!of_property_read_u32(node, "mrvl,clr-mfp-irq", &mfp_irq)) { icu_data[i].clr_mfp_irq_base = icu_data[i].virq_base; icu_data[i].clr_mfp_hwirq = mfp_irq; } irq_set_chained_handler(icu_data[i].cascade_irq, icu_mux_irq_demux); max_icu_nr++; return 0; |
c24b31147 ARM: mmp: support... |
478 |
err: |
0f374561b irqchip: mmp: sup... |
479 480 481 482 483 484 |
if (icu_data[i].virq_base) { for (j = 0; j < irq; j++) irq_dispose_mapping(icu_data[i].virq_base + j); } irq_domain_remove(icu_data[i].domain); return -EINVAL; |
c24b31147 ARM: mmp: support... |
485 |
} |
0f374561b irqchip: mmp: sup... |
486 |
IRQCHIP_DECLARE(mmp2_mux_intc, "mrvl,mmp2-mux-intc", mmp2_mux_of_init); |
c24b31147 ARM: mmp: support... |
487 |
#endif |