+++ /dev/null
-/*
- * linux/arch/arm/mach-mmp/irq-mmp2.c
- *
- * Generic IRQ handling, GPIO IRQ demultiplexing, etc.
- *
- * Author: Haojian Zhuang <haojian.zhuang@marvell.com>
- * Copyright: Marvell International Ltd.
- *
- * 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/init.h>
-#include <linux/irq.h>
-#include <linux/io.h>
-
-#include <mach/irqs.h>
-#include <mach/regs-icu.h>
-#include <mach/mmp2.h>
-
-#include "common.h"
-
-static void icu_mask_irq(struct irq_data *d)
-{
- uint32_t r = __raw_readl(ICU_INT_CONF(d->irq));
-
- r &= ~ICU_INT_ROUTE_PJ4_IRQ;
- __raw_writel(r, ICU_INT_CONF(d->irq));
-}
-
-static void icu_unmask_irq(struct irq_data *d)
-{
- uint32_t r = __raw_readl(ICU_INT_CONF(d->irq));
-
- r |= ICU_INT_ROUTE_PJ4_IRQ;
- __raw_writel(r, ICU_INT_CONF(d->irq));
-}
-
-static struct irq_chip icu_irq_chip = {
- .name = "icu_irq",
- .irq_mask = icu_mask_irq,
- .irq_mask_ack = icu_mask_irq,
- .irq_unmask = icu_unmask_irq,
-};
-
-static void pmic_irq_ack(struct irq_data *d)
-{
- if (d->irq == IRQ_MMP2_PMIC)
- mmp2_clear_pmic_int();
-}
-
-#define SECOND_IRQ_MASK(_name_, irq_base, prefix) \
-static void _name_##_mask_irq(struct irq_data *d) \
-{ \
- uint32_t r; \
- r = __raw_readl(prefix##_MASK) | (1 << (d->irq - irq_base)); \
- __raw_writel(r, prefix##_MASK); \
-}
-
-#define SECOND_IRQ_UNMASK(_name_, irq_base, prefix) \
-static void _name_##_unmask_irq(struct irq_data *d) \
-{ \
- uint32_t r; \
- r = __raw_readl(prefix##_MASK) & ~(1 << (d->irq - irq_base)); \
- __raw_writel(r, prefix##_MASK); \
-}
-
-#define SECOND_IRQ_DEMUX(_name_, irq_base, prefix) \
-static void _name_##_irq_demux(unsigned int irq, struct irq_desc *desc) \
-{ \
- unsigned long status, mask, n; \
- mask = __raw_readl(prefix##_MASK); \
- while (1) { \
- status = __raw_readl(prefix##_STATUS) & ~mask; \
- if (status == 0) \
- break; \
- n = find_first_bit(&status, BITS_PER_LONG); \
- while (n < BITS_PER_LONG) { \
- generic_handle_irq(irq_base + n); \
- n = find_next_bit(&status, BITS_PER_LONG, n+1); \
- } \
- } \
-}
-
-#define SECOND_IRQ_CHIP(_name_, irq_base, prefix) \
-SECOND_IRQ_MASK(_name_, irq_base, prefix) \
-SECOND_IRQ_UNMASK(_name_, irq_base, prefix) \
-SECOND_IRQ_DEMUX(_name_, irq_base, prefix) \
-static struct irq_chip _name_##_irq_chip = { \
- .name = #_name_, \
- .irq_mask = _name_##_mask_irq, \
- .irq_unmask = _name_##_unmask_irq, \
-}
-
-SECOND_IRQ_CHIP(pmic, IRQ_MMP2_PMIC_BASE, MMP2_ICU_INT4);
-SECOND_IRQ_CHIP(rtc, IRQ_MMP2_RTC_BASE, MMP2_ICU_INT5);
-SECOND_IRQ_CHIP(twsi, IRQ_MMP2_TWSI_BASE, MMP2_ICU_INT17);
-SECOND_IRQ_CHIP(misc, IRQ_MMP2_MISC_BASE, MMP2_ICU_INT35);
-SECOND_IRQ_CHIP(ssp, IRQ_MMP2_SSP_BASE, MMP2_ICU_INT51);
-
-static void init_mux_irq(struct irq_chip *chip, int start, int num)
-{
- int irq;
-
- for (irq = start; num > 0; irq++, num--) {
- struct irq_data *d = irq_get_irq_data(irq);
-
- /* mask and clear the IRQ */
- chip->irq_mask(d);
- if (chip->irq_ack)
- chip->irq_ack(d);
-
- irq_set_chip(irq, chip);
- set_irq_flags(irq, IRQF_VALID);
- irq_set_handler(irq, handle_level_irq);
- }
-}
-
-void __init mmp2_init_icu(void)
-{
- int irq;
-
- for (irq = 0; irq < IRQ_MMP2_MUX_BASE; irq++) {
- icu_mask_irq(irq_get_irq_data(irq));
- irq_set_chip(irq, &icu_irq_chip);
- set_irq_flags(irq, IRQF_VALID);
-
- switch (irq) {
- case IRQ_MMP2_PMIC_MUX:
- case IRQ_MMP2_RTC_MUX:
- case IRQ_MMP2_TWSI_MUX:
- case IRQ_MMP2_MISC_MUX:
- case IRQ_MMP2_SSP_MUX:
- break;
- default:
- irq_set_handler(irq, handle_level_irq);
- break;
- }
- }
-
- /* NOTE: IRQ_MMP2_PMIC requires the PMIC MFPR register
- * to be written to clear the interrupt
- */
- pmic_irq_chip.irq_ack = pmic_irq_ack;
-
- init_mux_irq(&pmic_irq_chip, IRQ_MMP2_PMIC_BASE, 2);
- init_mux_irq(&rtc_irq_chip, IRQ_MMP2_RTC_BASE, 2);
- init_mux_irq(&twsi_irq_chip, IRQ_MMP2_TWSI_BASE, 5);
- init_mux_irq(&misc_irq_chip, IRQ_MMP2_MISC_BASE, 15);
- init_mux_irq(&ssp_irq_chip, IRQ_MMP2_SSP_BASE, 2);
-
- irq_set_chained_handler(IRQ_MMP2_PMIC_MUX, pmic_irq_demux);
- irq_set_chained_handler(IRQ_MMP2_RTC_MUX, rtc_irq_demux);
- irq_set_chained_handler(IRQ_MMP2_TWSI_MUX, twsi_irq_demux);
- irq_set_chained_handler(IRQ_MMP2_MISC_MUX, misc_irq_demux);
- irq_set_chained_handler(IRQ_MMP2_SSP_MUX, ssp_irq_demux);
-}
--- /dev/null
+/*
+ * 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>
+#include <linux/irqdomain.h>
+#include <linux/io.h>
+#include <linux/ioport.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+
+#include <mach/irqs.h>
+
+#include "common.h"
+
+#define MAX_ICU_NR 16
+
+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;
+};
+
+void __iomem *mmp_icu_base;
+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);
+ }
+}
+
+static struct irq_chip icu_irq_chip = {
+ .name = "icu_irq",
+ .irq_mask = icu_mask_irq,
+ .irq_mask_ack = icu_mask_ack_irq,
+ .irq_unmask = icu_unmask_irq,
+};
+
+static void icu_mux_irq_demux(unsigned int irq, struct irq_desc *desc)
+{
+ 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\n", irq);
+ return;
+ }
+
+ mask = readl_relaxed(data->reg_mask);
+ while (1) {
+ status = readl_relaxed(data->reg_status) & ~mask;
+ if (status == 0)
+ break;
+ n = find_first_bit(&status, BITS_PER_LONG);
+ while (n < BITS_PER_LONG) {
+ generic_handle_irq(icu_data[i].virq_base + n);
+ n = find_next_bit(&status, BITS_PER_LONG, n + 1);
+ }
+ }
+}
+
+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);
+ set_irq_flags(irq, IRQF_VALID);
+ 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,
+};
+
+static struct mmp_intc_conf mmp_conf = {
+ .conf_enable = 0x51,
+ .conf_disable = 0x0,
+ .conf_mask = 0x7f,
+};
+
+static struct mmp_intc_conf mmp2_conf = {
+ .conf_enable = 0x20,
+ .conf_disable = 0x0,
+ .conf_mask = 0x7f,
+};
+
+/* 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);
+ set_irq_flags(irq, IRQF_VALID);
+ }
+ irq_set_default_host(icu_data[0].domain);
+}
+
+/* MMP2 (ARMv7) */
+void __init mmp2_init_icu(void)
+{
+ int irq;
+
+ 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;
+ icu_data[1].clr_mfp_irq_base = IRQ_MMP2_PMIC_BASE;
+ icu_data[1].clr_mfp_hwirq = IRQ_MMP2_PMIC - IRQ_MMP2_PMIC_BASE;
+ icu_data[1].nr_irqs = 2;
+ icu_data[1].virq_base = IRQ_MMP2_PMIC_BASE;
+ 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;
+ icu_data[2].virq_base = IRQ_MMP2_RTC_BASE;
+ 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;
+ icu_data[3].virq_base = IRQ_MMP2_KEYPAD_BASE;
+ 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;
+ icu_data[4].virq_base = IRQ_MMP2_TWSI_BASE;
+ 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;
+ icu_data[5].virq_base = IRQ_MMP2_MISC_BASE;
+ 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;
+ icu_data[6].virq_base = IRQ_MMP2_MIPI_HSI1_BASE;
+ 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;
+ icu_data[7].virq_base = IRQ_MMP2_MIPI_HSI0_BASE;
+ 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]);
+ for (irq = 0; irq < IRQ_MMP2_MUX_END; irq++) {
+ icu_mask_irq(irq_get_irq_data(irq));
+ switch (irq) {
+ case IRQ_MMP2_PMIC_MUX:
+ case IRQ_MMP2_RTC_MUX:
+ case IRQ_MMP2_KEYPAD_MUX:
+ case IRQ_MMP2_TWSI_MUX:
+ case IRQ_MMP2_MISC_MUX:
+ case IRQ_MMP2_MIPI_HSI1_MUX:
+ case IRQ_MMP2_MIPI_HSI0_MUX:
+ irq_set_chip(irq, &icu_irq_chip);
+ irq_set_chained_handler(irq, icu_mux_irq_demux);
+ break;
+ default:
+ irq_set_chip_and_handler(irq, &icu_irq_chip,
+ handle_level_irq);
+ break;
+ }
+ set_irq_flags(irq, IRQF_VALID);
+ }
+ irq_set_default_host(icu_data[0].domain);
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id intc_ids[] __initconst = {
+ { .compatible = "mrvl,mmp-intc", .data = &mmp_conf },
+ { .compatible = "mrvl,mmp2-intc", .data = &mmp2_conf },
+ {}
+};
+
+static const struct of_device_id mmp_mux_irq_match[] __initconst = {
+ { .compatible = "mrvl,mmp2-mux-intc" },
+ {}
+};
+
+int __init mmp2_mux_init(struct device_node *parent)
+{
+ struct device_node *node;
+ const struct of_device_id *of_id;
+ struct resource res;
+ int i, irq_base, ret, irq;
+ u32 nr_irqs, mfp_irq;
+
+ node = parent;
+ max_icu_nr = 1;
+ for (i = 1; i < MAX_ICU_NR; i++) {
+ node = of_find_matching_node(node, mmp_mux_irq_match);
+ if (!node)
+ break;
+ of_id = of_match_node(&mmp_mux_irq_match[0], node);
+ ret = of_property_read_u32(node, "mrvl,intc-nr-irqs",
+ &nr_irqs);
+ if (ret) {
+ pr_err("Not found mrvl,intc-nr-irqs property\n");
+ ret = -EINVAL;
+ goto err;
+ }
+ ret = of_address_to_resource(node, 0, &res);
+ if (ret < 0) {
+ pr_err("Not found reg property\n");
+ ret = -EINVAL;
+ goto err;
+ }
+ 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\n");
+ ret = -EINVAL;
+ goto err;
+ }
+ 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) {
+ ret = -EINVAL;
+ goto err;
+ }
+
+ irq_base = irq_alloc_descs(-1, 0, nr_irqs, 0);
+ if (irq_base < 0) {
+ pr_err("Failed to allocate IRQ numbers for mux intc\n");
+ ret = irq_base;
+ goto err;
+ }
+ if (!of_property_read_u32(node, "mrvl,clr-mfp-irq",
+ &mfp_irq)) {
+ icu_data[i].clr_mfp_irq_base = irq_base;
+ icu_data[i].clr_mfp_hwirq = mfp_irq;
+ }
+ irq_set_chained_handler(icu_data[i].cascade_irq,
+ icu_mux_irq_demux);
+ icu_data[i].nr_irqs = nr_irqs;
+ icu_data[i].virq_base = irq_base;
+ icu_data[i].domain = irq_domain_add_legacy(node, nr_irqs,
+ irq_base, 0,
+ &mmp_irq_domain_ops,
+ &icu_data[i]);
+ for (irq = irq_base; irq < irq_base + nr_irqs; irq++)
+ icu_mask_irq(irq_get_irq_data(irq));
+ }
+ max_icu_nr = i;
+ return 0;
+err:
+ of_node_put(node);
+ max_icu_nr = i;
+ return ret;
+}
+
+void __init mmp_dt_irq_init(void)
+{
+ struct device_node *node;
+ const struct of_device_id *of_id;
+ struct mmp_intc_conf *conf;
+ int nr_irqs, irq_base, ret, irq;
+
+ node = of_find_matching_node(NULL, intc_ids);
+ if (!node) {
+ pr_err("Failed to find interrupt controller in arch-mmp\n");
+ return;
+ }
+ of_id = of_match_node(intc_ids, node);
+ conf = of_id->data;
+
+ ret = of_property_read_u32(node, "mrvl,intc-nr-irqs", &nr_irqs);
+ 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
projects / cascardo / linux.git / commitdiff