[PATCH RESEND v4 6/9] irqchip/ls1x-cpu: Move the CPU IRQ driver from arch/mips/loongson32/common/

From: Binbin Zhou
Date: Wed May 18 2016 - 21:46:59 EST

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Signed-off-by: Chunbo Cui <cuichboo@xxxxxxx>
Signed-off-by: Binbin Zhou <zhoubb@xxxxxxxxxx>
Signed-off-by: Huacai Chen <chenhc@xxxxxxxxxx>
---
arch/mips/include/asm/irq_cpu.h | 1 +
arch/mips/loongson32/common/irq.c | 128 +-------------------
drivers/irqchip/Makefile | 1 +
drivers/irqchip/irq-ls1x-cpu.c | 242 ++++++++++++++++++++++++++++++++++++++
4 files changed, 245 insertions(+), 127 deletions(-)
create mode 100644 drivers/irqchip/irq-ls1x-cpu.c

diff --git a/arch/mips/include/asm/irq_cpu.h b/arch/mips/include/asm/irq_cpu.h
index 39a160b..a6ccd6f 100644
--- a/arch/mips/include/asm/irq_cpu.h
+++ b/arch/mips/include/asm/irq_cpu.h
@@ -16,6 +16,7 @@
extern void mips_cpu_irq_init(void);
extern void rm7k_cpu_irq_init(void);
extern void rm9k_cpu_irq_init(void);
+extern void ls1x_cpu_irq_init(void);

#ifdef CONFIG_IRQ_DOMAIN
struct device_node;
diff --git a/arch/mips/loongson32/common/irq.c b/arch/mips/loongson32/common/irq.c
index f2520f2..8e67a8c 100644
--- a/arch/mips/loongson32/common/irq.c
+++ b/arch/mips/loongson32/common/irq.c
@@ -14,134 +14,8 @@
#include <loongson1.h>
#include <irq.h>

-#define LS1X_INTC_REG(n, x) \
- ((void __iomem *)KSEG1ADDR(LS1X_INT_REG_BASE + (n * 0x18) + (x)))
-
-#define LS1X_INTC_INTISR(n) LS1X_INTC_REG(n, 0x0)
-#define LS1X_INTC_INTIEN(n) LS1X_INTC_REG(n, 0x4)
-#define LS1X_INTC_INTSET(n) LS1X_INTC_REG(n, 0x8)
-#define LS1X_INTC_INTCLR(n) LS1X_INTC_REG(n, 0xc)
-#define LS1X_INTC_INTPOL(n) LS1X_INTC_REG(n, 0x10)
-#define LS1X_INTC_INTEDGE(n) LS1X_INTC_REG(n, 0x14)
-
-static void ls1x_irq_ack(struct irq_data *d)
-{
- unsigned int bit = (d->irq - LS1X_IRQ_BASE) & 0x1f;
- unsigned int n = (d->irq - LS1X_IRQ_BASE) >> 5;
-
- __raw_writel(__raw_readl(LS1X_INTC_INTCLR(n))
- | (1 << bit), LS1X_INTC_INTCLR(n));
-}
-
-static void ls1x_irq_mask(struct irq_data *d)
-{
- unsigned int bit = (d->irq - LS1X_IRQ_BASE) & 0x1f;
- unsigned int n = (d->irq - LS1X_IRQ_BASE) >> 5;
-
- __raw_writel(__raw_readl(LS1X_INTC_INTIEN(n))
- & ~(1 << bit), LS1X_INTC_INTIEN(n));
-}
-
-static void ls1x_irq_mask_ack(struct irq_data *d)
-{
- unsigned int bit = (d->irq - LS1X_IRQ_BASE) & 0x1f;
- unsigned int n = (d->irq - LS1X_IRQ_BASE) >> 5;
-
- __raw_writel(__raw_readl(LS1X_INTC_INTIEN(n))
- & ~(1 << bit), LS1X_INTC_INTIEN(n));
- __raw_writel(__raw_readl(LS1X_INTC_INTCLR(n))
- | (1 << bit), LS1X_INTC_INTCLR(n));
-}
-
-static void ls1x_irq_unmask(struct irq_data *d)
-{
- unsigned int bit = (d->irq - LS1X_IRQ_BASE) & 0x1f;
- unsigned int n = (d->irq - LS1X_IRQ_BASE) >> 5;
-
- __raw_writel(__raw_readl(LS1X_INTC_INTIEN(n))
- | (1 << bit), LS1X_INTC_INTIEN(n));
-}
-
-static struct irq_chip ls1x_irq_chip = {
- .name = "LS1X-INTC",
- .irq_ack = ls1x_irq_ack,
- .irq_mask = ls1x_irq_mask,
- .irq_mask_ack = ls1x_irq_mask_ack,
- .irq_unmask = ls1x_irq_unmask,
-};
-
-static void ls1x_irq_dispatch(int n)
-{
- u32 int_status, irq;
-
- /* Get pending sources, masked by current enables */
- int_status = __raw_readl(LS1X_INTC_INTISR(n)) &
- __raw_readl(LS1X_INTC_INTIEN(n));
-
- if (int_status) {
- irq = LS1X_IRQ(n, __ffs(int_status));
- do_IRQ(irq);
- }
-}
-
-asmlinkage void plat_irq_dispatch(void)
-{
- unsigned int pending;
-
- pending = read_c0_cause() & read_c0_status() & ST0_IM;
-
- if (pending & CAUSEF_IP7)
- do_IRQ(TIMER_IRQ);
- else if (pending & CAUSEF_IP2)
- ls1x_irq_dispatch(0); /* INT0 */
- else if (pending & CAUSEF_IP3)
- ls1x_irq_dispatch(1); /* INT1 */
- else if (pending & CAUSEF_IP4)
- ls1x_irq_dispatch(2); /* INT2 */
- else if (pending & CAUSEF_IP5)
- ls1x_irq_dispatch(3); /* INT3 */
- else if (pending & CAUSEF_IP6)
- ls1x_irq_dispatch(4); /* INT4 */
- else
- spurious_interrupt();
-
-}
-
-struct irqaction cascade_irqaction = {
- .handler = no_action,
- .name = "cascade",
- .flags = IRQF_NO_THREAD,
-};
-
-static void __init ls1x_irq_init(int base)
-{
- int n;
-
- /* Disable interrupts and clear pending,
- * setup all IRQs as high level triggered
- */
- for (n = 0; n < 4; n++) {
- __raw_writel(0x0, LS1X_INTC_INTIEN(n));
- __raw_writel(0xffffffff, LS1X_INTC_INTCLR(n));
- __raw_writel(0xffffffff, LS1X_INTC_INTPOL(n));
- /* set DMA0, DMA1 and DMA2 to edge trigger */
- __raw_writel(n ? 0x0 : 0xe000, LS1X_INTC_INTEDGE(n));
- }
-
-
- for (n = base; n < LS1X_IRQS; n++) {
- irq_set_chip_and_handler(n, &ls1x_irq_chip,
- handle_level_irq);
- }
-
- setup_irq(INT0_IRQ, &cascade_irqaction);
- setup_irq(INT1_IRQ, &cascade_irqaction);
- setup_irq(INT2_IRQ, &cascade_irqaction);
- setup_irq(INT3_IRQ, &cascade_irqaction);
-}
-
void __init arch_init_irq(void)
{
mips_cpu_irq_init();
- ls1x_irq_init(LS1X_IRQ_BASE);
+ ls1x_cpu_irq_init();
}
diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile
index b03cfcb..ae53eb9 100644
--- a/drivers/irqchip/Makefile
+++ b/drivers/irqchip/Makefile
@@ -5,6 +5,7 @@ obj-$(CONFIG_ATH79) += irq-ath79-cpu.o
obj-$(CONFIG_ATH79) += irq-ath79-misc.o
obj-$(CONFIG_ARCH_BCM2835) += irq-bcm2835.o
obj-$(CONFIG_ARCH_BCM2835) += irq-bcm2836.o
+obj-$(CONFIG_MACH_LOONGSON32) += irq-ls1x-cpu.o
obj-$(CONFIG_ARCH_EXYNOS) += exynos-combiner.o
obj-$(CONFIG_ARCH_HIP04) += irq-hip04.o
obj-$(CONFIG_ARCH_MMP) += irq-mmp.o
diff --git a/drivers/irqchip/irq-ls1x-cpu.c b/drivers/irqchip/irq-ls1x-cpu.c
new file mode 100644
index 0000000..0df984b
--- /dev/null
+++ b/drivers/irqchip/irq-ls1x-cpu.c
@@ -0,0 +1,242 @@
+/*
+ * Copyright (c) 2011 Zhang, Keguang <keguang.zhang@xxxxxxxxx>
+ * Copyright (c) 2016 Binbin Zhou <zhoubb@xxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/irqchip.h>
+#include <linux/irqdomain.h>
+#include <asm/irq_cpu.h>
+
+#include <loongson1.h>
+#include <irq.h>
+
+#define LS1X_INTC_REG(n, x) \
+ ((void __iomem *)KSEG1ADDR(LS1X_INT_REG_BASE + (n * 0x18) + (x)))
+
+#define LS1X_INTC_INTISR(n) LS1X_INTC_REG(n, 0x0)
+#define LS1X_INTC_INTIEN(n) LS1X_INTC_REG(n, 0x4)
+#define LS1X_INTC_INTSET(n) LS1X_INTC_REG(n, 0x8)
+#define LS1X_INTC_INTCLR(n) LS1X_INTC_REG(n, 0xc)
+#define LS1X_INTC_INTPOL(n) LS1X_INTC_REG(n, 0x10)
+#define LS1X_INTC_INTEDGE(n) LS1X_INTC_REG(n, 0x14)
+
+static void ls1x_irq_ack(struct irq_data *d)
+{
+ unsigned int bit = (d->irq - LS1X_IRQ_BASE) & 0x1f;
+ unsigned int n = (d->irq - LS1X_IRQ_BASE) >> 5;
+
+ ls1x_writel(ls1x_readl(LS1X_INTC_INTCLR(n))
+ | (1 << bit), LS1X_INTC_INTCLR(n));
+}
+
+static void ls1x_irq_mask(struct irq_data *d)
+{
+ unsigned int bit = (d->irq - LS1X_IRQ_BASE) & 0x1f;
+ unsigned int n = (d->irq - LS1X_IRQ_BASE) >> 5;
+
+ ls1x_writel(ls1x_readl(LS1X_INTC_INTIEN(n))
+ & ~(1 << bit), LS1X_INTC_INTIEN(n));
+}
+
+static void ls1x_irq_mask_ack(struct irq_data *d)
+{
+ unsigned int bit = (d->irq - LS1X_IRQ_BASE) & 0x1f;
+ unsigned int n = (d->irq - LS1X_IRQ_BASE) >> 5;
+
+ ls1x_writel(ls1x_readl(LS1X_INTC_INTIEN(n))
+ & ~(1 << bit), LS1X_INTC_INTIEN(n));
+ ls1x_writel(ls1x_readl(LS1X_INTC_INTCLR(n))
+ | (1 << bit), LS1X_INTC_INTCLR(n));
+}
+
+static void ls1x_irq_unmask(struct irq_data *d)
+{
+ unsigned int bit = (d->irq - LS1X_IRQ_BASE) & 0x1f;
+ unsigned int n = (d->irq - LS1X_IRQ_BASE) >> 5;
+
+ ls1x_writel(ls1x_readl(LS1X_INTC_INTIEN(n))
+ | (1 << bit), LS1X_INTC_INTIEN(n));
+}
+
+static void ls1x_irq_edge_type(struct irq_data *data, unsigned int flow_type)
+{
+ unsigned int bit = (data->irq - LS1X_IRQ_BASE) & 0x1f;
+ unsigned int n = (data->irq - LS1X_IRQ_BASE) >> 5;
+
+ if (flow_type & IRQ_TYPE_EDGE_RISING)
+ ls1x_writel(ls1x_readl(LS1X_INTC_INTPOL(n)) | (1 << bit),
+ LS1X_INTC_INTPOL(n));
+ else
+ ls1x_writel(ls1x_readl(LS1X_INTC_INTPOL(n)) & ~(1 << bit),
+ LS1X_INTC_INTPOL(n));
+
+ ls1x_writel(ls1x_readl(LS1X_INTC_INTEDGE(n)) | (1 << bit),
+ LS1X_INTC_INTEDGE(n));
+ ls1x_writel(ls1x_readl(LS1X_INTC_INTIEN(n)) | (1 << bit),
+ LS1X_INTC_INTIEN(n));
+
+ irq_set_handler_locked(data, handle_edge_irq);
+}
+
+static void ls1x_irq_level_type(struct irq_data *data, unsigned int flow_type)
+{
+ unsigned int bit = (data->irq - LS1X_IRQ_BASE) & 0x1f;
+ unsigned int n = (data->irq - LS1X_IRQ_BASE) >> 5;
+
+ if (flow_type & IRQ_TYPE_LEVEL_HIGH)
+ ls1x_writel(ls1x_readl(LS1X_INTC_INTPOL(n)) | (1 << bit),
+ LS1X_INTC_INTPOL(n));
+ else if (flow_type & IRQ_TYPE_LEVEL_LOW)
+ ls1x_writel(ls1x_readl(LS1X_INTC_INTPOL(n)) & ~(1 << bit),
+ LS1X_INTC_INTPOL(n));
+
+ ls1x_writel(ls1x_readl(LS1X_INTC_INTEDGE(n)) & ~(1 << bit),
+ LS1X_INTC_INTEDGE(n));
+ ls1x_writel(ls1x_readl(LS1X_INTC_INTIEN(n)) | (1 << bit),
+ LS1X_INTC_INTIEN(n));
+
+ irq_set_handler_locked(data, handle_level_irq);
+}
+
+static int ls1x_irq_set_type(struct irq_data *data, unsigned int flow_type)
+{
+ unsigned int bit = (data->irq - LS1X_IRQ_BASE) & 0x1f;
+ unsigned int n = (data->irq - LS1X_IRQ_BASE) >> 5;
+
+ if ((flow_type & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH) {
+ pr_info("ls1x irq don't support both rising and falling\n");
+ return -1;
+ }
+
+ ls1x_writel(ls1x_readl(LS1X_INTC_INTCLR(n)) | (1 << bit),
+ LS1X_INTC_INTCLR(n));
+
+ if (flow_type & IRQ_TYPE_EDGE_BOTH)
+ ls1x_irq_edge_type(data, flow_type);
+ else if (flow_type && IRQ_TYPE_LEVEL_MASK)
+ ls1x_irq_level_type(data, flow_type);
+
+ return IRQ_SET_MASK_OK;
+}
+
+static struct irq_chip ls1x_cpu_irq_chip = {
+ .name = "LS1X-INTC",
+ .irq_ack = ls1x_irq_ack,
+ .irq_mask = ls1x_irq_mask,
+ .irq_mask_ack = ls1x_irq_mask_ack,
+ .irq_unmask = ls1x_irq_unmask,
+ .irq_set_type = ls1x_irq_set_type,
+};
+
+static void ls1x_irq_dispatch(int n)
+{
+ u32 int_status, irq;
+
+ /* Get pending sources, masked by current enables */
+ int_status = ls1x_readl(LS1X_INTC_INTISR(n)) &
+ ls1x_readl(LS1X_INTC_INTIEN(n));
+
+ if (int_status) {
+ irq = LS1X_IRQ(n, __ffs(int_status));
+ do_IRQ(irq);
+ }
+}
+
+asmlinkage void plat_irq_dispatch(void)
+{
+ unsigned int pending;
+
+ pending = read_c0_cause() & read_c0_status() & ST0_IM;
+
+ if (pending & CAUSEF_IP7)
+ do_IRQ(TIMER_IRQ);
+ else if (pending & CAUSEF_IP2)
+ ls1x_irq_dispatch(0); /* INT0 */
+ else if (pending & CAUSEF_IP3)
+ ls1x_irq_dispatch(1); /* INT1 */
+ else if (pending & CAUSEF_IP4)
+ ls1x_irq_dispatch(2); /* INT2 */
+ else if (pending & CAUSEF_IP5)
+ ls1x_irq_dispatch(3); /* INT3 */
+ else if (pending & CAUSEF_IP6)
+ ls1x_irq_dispatch(4); /* INT4 */
+ else
+ spurious_interrupt();
+
+}
+
+struct irqaction cascade_irqaction = {
+ .handler = no_action,
+ .name = "cascade",
+ .flags = IRQF_NO_THREAD,
+};
+
+static int ls1x_cpu_intc_map(struct irq_domain *d, unsigned int irq,
+ irq_hw_number_t hw)
+{
+ int n;
+
+ /*
+ * Disable interrupts and clear pending,
+ * setup all IRQs as high level triggered
+ */
+ for (n = 0; n < 4; n++) {
+ ls1x_writel(0x0, LS1X_INTC_INTIEN(n));
+ ls1x_writel(0xffffffff, LS1X_INTC_INTCLR(n));
+ ls1x_writel(0xffffffff, LS1X_INTC_INTPOL(n));
+ /* set DMA0, DMA1 and DMA2 to edge trigger */
+ ls1x_writel(n ? 0x0 : 0xe000, LS1X_INTC_INTEDGE(n));
+ }
+
+
+ for (n = LS1X_IRQ_BASE; n < LS1X_IRQS; n++) {
+ irq_set_chip_and_handler(n, &ls1x_cpu_irq_chip,
+ handle_level_irq);
+ }
+
+ setup_irq(INT0_IRQ, &cascade_irqaction);
+ setup_irq(INT1_IRQ, &cascade_irqaction);
+ setup_irq(INT2_IRQ, &cascade_irqaction);
+ setup_irq(INT3_IRQ, &cascade_irqaction);
+ setup_irq(INT4_IRQ, &cascade_irqaction);
+
+ return 0;
+}
+
+static const struct irq_domain_ops ls1x_cpu_intc_domain_ops = {
+ .map = ls1x_cpu_intc_map,
+ .xlate = irq_domain_xlate_onecell,
+};
+
+static void __init __ls1x_irq_init(struct device_node *of_node)
+{
+ struct irq_domain *domain;
+
+ domain = irq_domain_add_legacy(of_node, LS1X_IRQS, LS1X_IRQ_BASE, 0,
+ &ls1x_cpu_intc_domain_ops, NULL);
+ if (!domain)
+ panic("Failed to add irqdomain for MIPS CPU");
+}
+
+void __init ls1x_cpu_irq_init(void)
+{
+ __ls1x_irq_init(NULL);
+}
+
+static int __init ls1x_cpu_irq_of_init(
+ struct device_node *node, struct device_node *parent)
+
+{
+ __ls1x_irq_init(node);
+ return 0;
+}
+
+IRQCHIP_DECLARE(ls1x_cpu_intc, "loongson-1A cpu-irq-intc",
+ ls1x_cpu_irq_of_init);
--
1.9.1

Next message: Zheng, Lv: "RE: [RFC PATCH 1/2] ACPI / button: Send "open" state after boot/resume"
Previous message: Kefeng Wang: "Re: [PATCH] serial: 8250_early: Add earlycon support for Synopsys DesignWare ABP UART"
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