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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/drivers/irqchip/irq-mmp.c
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/drivers/irqchip/irq-mmp.c')
-rw-r--r--kernel/drivers/irqchip/irq-mmp.c491
1 files changed, 491 insertions, 0 deletions
diff --git a/kernel/drivers/irqchip/irq-mmp.c b/kernel/drivers/irqchip/irq-mmp.c
new file mode 100644
index 000000000..c0da57bdb
--- /dev/null
+++ b/kernel/drivers/irqchip/irq-mmp.c
@@ -0,0 +1,491 @@
+/*
+ * 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 <asm/exception.h>
+#include <asm/hardirq.h>
+
+#include "irqchip.h"
+
+#define MAX_ICU_NR 16
+
+#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
+
+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;
+};
+
+static 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);
+ }
+}
+
+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;
+ for_each_set_bit(n, &status, BITS_PER_LONG) {
+ generic_handle_irq(icu_data[i].virq_base + n);
+ }
+ }
+}
+
+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,
+};
+
+static void __exception_irq_entry mmp_handle_irq(struct pt_regs *regs)
+{
+ int hwirq;
+
+ hwirq = readl_relaxed(mmp_icu_base + PJ1_INT_SEL);
+ if (!(hwirq & SEL_INT_PENDING))
+ return;
+ hwirq &= SEL_INT_NUM_MASK;
+ handle_domain_irq(icu_data[0].domain, hwirq, regs);
+}
+
+static void __exception_irq_entry mmp2_handle_irq(struct pt_regs *regs)
+{
+ int hwirq;
+
+ hwirq = readl_relaxed(mmp_icu_base + PJ4_INT_SEL);
+ if (!(hwirq & SEL_INT_PENDING))
+ return;
+ hwirq &= SEL_INT_NUM_MASK;
+ handle_domain_irq(icu_data[0].domain, hwirq, regs);
+}
+
+/* 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);
+ set_handle_irq(mmp_handle_irq);
+}
+
+/* MMP2 (ARMv7) */
+void __init mmp2_init_icu(void)
+{
+ int irq, end;
+
+ 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 = icu_data[0].virq_base +
+ icu_data[0].nr_irqs;
+ icu_data[1].clr_mfp_hwirq = 1; /* offset to IRQ_MMP2_PMIC_BASE */
+ icu_data[1].nr_irqs = 2;
+ icu_data[1].cascade_irq = 4;
+ icu_data[1].virq_base = icu_data[0].virq_base + icu_data[0].nr_irqs;
+ 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].cascade_irq = 5;
+ icu_data[2].virq_base = icu_data[1].virq_base + icu_data[1].nr_irqs;
+ 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].cascade_irq = 9;
+ icu_data[3].virq_base = icu_data[2].virq_base + icu_data[2].nr_irqs;
+ 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].cascade_irq = 17;
+ icu_data[4].virq_base = icu_data[3].virq_base + icu_data[3].nr_irqs;
+ 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].cascade_irq = 35;
+ icu_data[5].virq_base = icu_data[4].virq_base + icu_data[4].nr_irqs;
+ 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].cascade_irq = 51;
+ icu_data[6].virq_base = icu_data[5].virq_base + icu_data[5].nr_irqs;
+ 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].cascade_irq = 55;
+ icu_data[7].virq_base = icu_data[6].virq_base + icu_data[6].nr_irqs;
+ 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]);
+ end = icu_data[7].virq_base + icu_data[7].nr_irqs;
+ for (irq = 0; irq < end; irq++) {
+ icu_mask_irq(irq_get_irq_data(irq));
+ 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) {
+ irq_set_chip(irq, &icu_irq_chip);
+ irq_set_chained_handler(irq, icu_mux_irq_demux);
+ } else {
+ 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);
+ set_handle_irq(mmp2_handle_irq);
+}
+
+#ifdef CONFIG_OF
+static int __init mmp_init_bases(struct device_node *node)
+{
+ int ret, nr_irqs, irq, i = 0;
+
+ 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 ret;
+ }
+
+ mmp_icu_base = of_iomap(node, 0);
+ if (!mmp_icu_base) {
+ pr_err("Failed to get interrupt controller register\n");
+ 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\n");
+ goto err;
+ }
+ if (!irq)
+ icu_data[0].virq_base = ret;
+ }
+ icu_data[0].nr_irqs = nr_irqs;
+ return 0;
+err:
+ 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;
+}
+
+static int __init mmp_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 = 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);
+ if (ret) {
+ pr_err("Not found mrvl,intc-nr-irqs property\n");
+ return -EINVAL;
+ }
+ ret = of_address_to_resource(node, 0, &res);
+ if (ret < 0) {
+ pr_err("Not found reg property\n");
+ return -EINVAL;
+ }
+ 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");
+ return -EINVAL;
+ }
+ 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,
+ &mmp_irq_domain_ops,
+ &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\n");
+ 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;
+err:
+ 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;
+}
+IRQCHIP_DECLARE(mmp2_mux_intc, "mrvl,mmp2-mux-intc", mmp2_mux_of_init);
+#endif