[PATCH] irqchip/csky: support csky,dh7k SOC intc driver

From: guoren
Date: Wed Jan 09 2019 - 05:21:22 EST

From: Guo Ren <ren_guo@xxxxxxxxx>

C-SKY dh7k SOC use simple APB interrupt controller and most of driver's
implementation codes could be reused in csky-apb-intc.c. So merge them
together.

Signed-off-by: Guo Ren <ren_guo@xxxxxxxxx>
---
.../interrupt-controller/csky,apb-intc.txt | 1 +
drivers/irqchip/irq-csky-apb-intc.c | 95 +++++++++++++++++++---
2 files changed, 86 insertions(+), 10 deletions(-)

diff --git a/Documentation/devicetree/bindings/interrupt-controller/csky,apb-intc.txt b/Documentation/devicetree/bindings/interrupt-controller/csky,apb-intc.txt
index 44286dc..63bc9dc 100644
--- a/Documentation/devicetree/bindings/interrupt-controller/csky,apb-intc.txt
+++ b/Documentation/devicetree/bindings/interrupt-controller/csky,apb-intc.txt
@@ -23,6 +23,7 @@ intc node bindings definition
Definition: must be "csky,apb-intc"
"csky,dual-apb-intc"
"csky,gx6605s-intc"
+ "csky,dh7k-intc"
- #interrupt-cells
Usage: required
Value type: <u32>
diff --git a/drivers/irqchip/irq-csky-apb-intc.c b/drivers/irqchip/irq-csky-apb-intc.c
index 5a2ec43..fcc5444 100644
--- a/drivers/irqchip/irq-csky-apb-intc.c
+++ b/drivers/irqchip/irq-csky-apb-intc.c
@@ -12,6 +12,7 @@
#include <linux/interrupt.h>
#include <linux/io.h>
#include <asm/irq.h>
+#include <asm/traps.h>

#define INTC_IRQS 64

@@ -31,6 +32,17 @@
#define GX_INTC_NMASK63_32 0x54
#define GX_INTC_SOURCE 0x60

+#define DH_INTC_CLR 0x10
+#define DH_INTC_INIT 0x34
+#define DH_INTC_NMASK31_00 0x08
+#define DH_INTC_NMASK63_32 0x68
+#define DH_INTC_SOURCE31_00 0x14
+#define DH_INTC_SOURCE63_32 0x6c
+#define DH_INTC_EDGE31_00 0x00
+#define DH_INTC_EDGE63_32 0x60
+#define DH_INTC_POLL31_00 0x04
+#define DH_INTC_POLL63_32 0x64
+
static void __iomem *reg_base;
static struct irq_domain *root_domain;

@@ -58,15 +70,21 @@ static void irq_ck_mask_set_bit(struct irq_data *d)
}

static void __init ck_set_gc(struct device_node *node, void __iomem *reg_base,
- u32 mask_reg, u32 irq_base)
+ u32 en_off, u32 mask_off, u32 irq_base)
{
struct irq_chip_generic *gc;

gc = irq_get_domain_generic_chip(root_domain, irq_base);
gc->reg_base = reg_base;
- gc->chip_types[0].regs.mask = mask_reg;
- gc->chip_types[0].chip.irq_mask = irq_gc_mask_clr_bit;
- gc->chip_types[0].chip.irq_unmask = irq_gc_mask_set_bit;
+ if (en_off) {
+ gc->chip_types[0].regs.mask = en_off;
+ gc->chip_types[0].chip.irq_mask = irq_gc_mask_clr_bit;
+ gc->chip_types[0].chip.irq_unmask = irq_gc_mask_set_bit;
+ } else if (mask_off) {
+ gc->chip_types[0].regs.mask = mask_off;
+ gc->chip_types[0].chip.irq_mask = irq_gc_mask_set_bit;
+ gc->chip_types[0].chip.irq_unmask = irq_gc_mask_clr_bit;
+ }

if (of_find_property(node, "csky,support-pulse-signal", NULL))
gc->chip_types[0].chip.irq_unmask = irq_ck_mask_set_bit;
@@ -183,8 +201,8 @@ gx_intc_init(struct device_node *node, struct device_node *parent)

setup_irq_channel(0x03020100, reg_base + GX_INTC_SOURCE);

- ck_set_gc(node, reg_base, GX_INTC_NEN31_00, 0);
- ck_set_gc(node, reg_base, GX_INTC_NEN63_32, 32);
+ ck_set_gc(node, reg_base, GX_INTC_NEN31_00, 0, 0);
+ ck_set_gc(node, reg_base, GX_INTC_NEN63_32, 0, 32);

set_handle_irq(gx_irq_handler);

@@ -192,6 +210,63 @@ gx_intc_init(struct device_node *node, struct device_node *parent)
}
IRQCHIP_DECLARE(csky_gx6605s_intc, "csky,gx6605s-intc", gx_intc_init);

+static void dh_irq_handler(struct pt_regs *regs)
+{
+ u32 tmp;
+ unsigned long vector = (mfcr("psr") >> 16) & 0xff;
+
+ tmp = readl(reg_base + DH_INTC_CLR);
+ tmp |= BIT(2);
+ writel(tmp, reg_base + DH_INTC_CLR);
+
+ handle_domain_irq(root_domain, vector - 32, regs);
+}
+
+extern void csky_irq(void);
+
+static int __init
+dh_intc_init(struct device_node *node, struct device_node *parent)
+{
+ int ret, i;
+
+ ret = ck_intc_init_comm(node, parent);
+ if (ret)
+ return ret;
+
+ /* set default mode */
+ writel(0xffffffff, reg_base + DH_INTC_EDGE31_00);
+ writel(0xffffffff, reg_base + DH_INTC_EDGE63_32);
+ writel(0xffffffff, reg_base + DH_INTC_POLL31_00);
+ writel(0xffffffff, reg_base + DH_INTC_POLL63_32);
+
+ writel(BIT(1) | BIT(6), reg_base + DH_INTC_INIT);
+
+ /* Setup 0-31 channel slots */
+ for (i = 0; i < INTC_IRQS/2; i += 4)
+ writel(build_channel_val(i, 0x03020100) + 0x40404040,
+ reg_base + DH_INTC_SOURCE31_00 + i);
+
+ /* Setup 32-63 channel slots */
+ for (i = 0; i < INTC_IRQS/2; i += 4)
+ writel(build_channel_val(i, 0x03020100) + 0x40404040,
+ reg_base + DH_INTC_SOURCE63_32 + i);
+
+ /* mask all interrrupts */
+ writel(0xffffffff, reg_base + DH_INTC_NMASK31_00);
+ writel(0xffffffff, reg_base + DH_INTC_NMASK63_32);
+
+ ck_set_gc(node, reg_base, 0, DH_INTC_NMASK31_00, 0);
+ ck_set_gc(node, reg_base, 0, DH_INTC_NMASK63_32, 32);
+
+ for (i = 32; i < 128; i++)
+ VEC_INIT(i, csky_irq);
+
+ set_handle_irq(dh_irq_handler);
+
+ return 0;
+}
+IRQCHIP_DECLARE(csky_dh7k_intc, "csky,dh7k-intc", dh_intc_init);
+
/*
* C-SKY simple 64 irqs interrupt controller, dual-together could support 128
* irqs.
@@ -243,8 +318,8 @@ ck_intc_init(struct device_node *node, struct device_node *parent)
/* Enable irq intc */
writel(BIT(31), reg_base + CK_INTC_ICR);

- ck_set_gc(node, reg_base, CK_INTC_NEN31_00, 0);
- ck_set_gc(node, reg_base, CK_INTC_NEN63_32, 32);
+ ck_set_gc(node, reg_base, CK_INTC_NEN31_00, 0, 0);
+ ck_set_gc(node, reg_base, CK_INTC_NEN63_32, 0, 32);

setup_irq_channel(0x00010203, reg_base + CK_INTC_SOURCE);

@@ -270,8 +345,8 @@ ck_dual_intc_init(struct device_node *node, struct device_node *parent)
writel(0, reg_base + CK_INTC_NEN31_00 + CK_INTC_DUAL_BASE);
writel(0, reg_base + CK_INTC_NEN63_32 + CK_INTC_DUAL_BASE);

- ck_set_gc(node, reg_base + CK_INTC_DUAL_BASE, CK_INTC_NEN31_00, 64);
- ck_set_gc(node, reg_base + CK_INTC_DUAL_BASE, CK_INTC_NEN63_32, 96);
+ ck_set_gc(node, reg_base + CK_INTC_DUAL_BASE, CK_INTC_NEN31_00, 0, 64);
+ ck_set_gc(node, reg_base + CK_INTC_DUAL_BASE, CK_INTC_NEN63_32, 0, 96);

setup_irq_channel(0x00010203,
reg_base + CK_INTC_SOURCE + CK_INTC_DUAL_BASE);
--
2.7.4