[PATCH v3 18/19] sh: IO-DATA HDL-U (a,k.a landisk) support

From: Yoshinori Sato
Date: Tue Jun 28 2016 - 02:37:41 EST

Signed-off-by: Yoshinori Sato <ysato@xxxxxxxxxxxxxxxxxxxx>
---
.../interrupt-controller/iodata-landisk.txt | 34 ++++++++++
arch/sh/boot/dts/Makefile | 2 +
arch/sh/boot/dts/landisk.dts | 62 ++++++++++++++++++
drivers/irqchip/Makefile | 2 +-
drivers/irqchip/irq-io-landisk.c | 73 ++++++++++++++++++++++
5 files changed, 172 insertions(+), 1 deletion(-)
create mode 100644 Documentation/devicetree/bindings/interrupt-controller/iodata-landisk.txt
create mode 100644 arch/sh/boot/dts/landisk.dts
create mode 100644 drivers/irqchip/irq-io-landisk.c

diff --git a/Documentation/devicetree/bindings/interrupt-controller/iodata-landisk.txt b/Documentation/devicetree/bindings/interrupt-controller/iodata-landisk.txt
new file mode 100644
index 0000000..9f87f2c
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/iodata-landisk.txt
@@ -0,0 +1,34 @@
+DT bindings for the I/O DATA HDL-U interrupt controller
+
+Required properties:
+
+ - compatible: has to be "iodata,landisk-intc".
+
+ - reg: Base address and length of interrupt controller register.
+
+ - interrupt-controller: Identifies the node as an interrupt controller.
+
+ - #address-cells: has to be <0>.
+
+ - #interrupt-cells: has to be <1>: an interrupt index.
+
+ - interrupt-map: Interrupt mapping on parent controller.
+
+Example
+-------
+
+ cpldintc: cpld@b0000000 {
+ compatible = "iodata,landisk-intc";
+ #address-cells = <0>;
+ #interrupt-cells = <1>;
+ interrupt-controller;
+ reg = <0xb0000000 8>;
+ interrupt-map=<0 &shintc evt2irq(0x2a0)>,
+ <1 &shintc evt2irq(0x2c0)>,
+ <2 &shintc evt2irq(0x2e0)>,
+ <3 &shintc evt2irq(0x300)>,
+ <4 &shintc evt2irq(0x320)>,
+ <5 &shintc evt2irq(0x340)>,
+ <6 &shintc evt2irq(0x360)>,
+ <7 &shintc evt2irq(0x380)>;
+ };
diff --git a/arch/sh/boot/dts/Makefile b/arch/sh/boot/dts/Makefile
index 38fdc38..cf5aec4 100644
--- a/arch/sh/boot/dts/Makefile
+++ b/arch/sh/boot/dts/Makefile
@@ -1,5 +1,7 @@
obj-$(CONFIG_USE_BUILTIN_DTB) += $(patsubst "%",%,$(CONFIG_BUILTIN_DTB_SOURCE)).dtb.o

+dtb-y += landisk.dtb
+
dtstree := $(srctree)/$(src)
clean-files := *.dtb.S
always := $(dtb-y)
diff --git a/arch/sh/boot/dts/landisk.dts b/arch/sh/boot/dts/landisk.dts
new file mode 100644
index 0000000..240d11b
--- /dev/null
+++ b/arch/sh/boot/dts/landisk.dts
@@ -0,0 +1,62 @@
+/dts-v1/;
+
+#include "sh7751.dtsi"
+
+/ {
+ model = "I/O DATA HDL-U";
+ compatible = "iodata,hdl-u";
+ #address-cells = <1>;
+ #size-cells = <1>;
+ interrupt-parent = <&shintc>;
+ chosen {
+ stdout-path = &sci1;
+ bootargs = "console=ttySC1,115200";
+ };
+ aliases {
+ serial0 = &sci0;
+ serial1 = &sci1;
+ };
+
+ memory@0c000000 {
+ device_type = "memory";
+ reg = <0x0c000000 0x4000000>;
+ };
+ cpldintc: cpld@b0000000 {
+ compatible = "iodata,landisk-intc";
+ #address-cells = <0>;
+ #interrupt-cells = <1>;
+ interrupt-controller;
+ reg = <0xb0000000 8>;
+ interrupt-map=<0 &shintc evt2irq(0x2a0)>,
+ <1 &shintc evt2irq(0x2c0)>,
+ <2 &shintc evt2irq(0x2e0)>,
+ <3 &shintc evt2irq(0x300)>,
+ <4 &shintc evt2irq(0x320)>,
+ <5 &shintc evt2irq(0x340)>,
+ <6 &shintc evt2irq(0x360)>,
+ <7 &shintc evt2irq(0x380)>;
+ };
+};
+
+&oclk {
+ clock-frequency = <22222222>;
+};
+
+&sci0 {
+ status = "ok";
+};
+
+&sci1 {
+ status = "ok";
+};
+
+&pci {
+ compatible = "renesas,sh7751-pci", "iodata,landisk-pci";
+ interrupt-map-mask = <0x1800 0 7>;
+ interrupt-map = <0x0000 0 1 &cpldintc 0>,
+ <0x0800 0 1 &cpldintc 1>,
+ <0x1000 0 1 &cpldintc 2>,
+ <0x1000 0 2 &cpldintc 3>,
+ <0x1000 0 3 &cpldintc 0>;
+ status = "ok";
+};
diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile
index 2ab5735..5e225cf 100644
--- a/drivers/irqchip/Makefile
+++ b/drivers/irqchip/Makefile
@@ -69,4 +69,4 @@ obj-$(CONFIG_PIC32_EVIC) += irq-pic32-evic.o
obj-$(CONFIG_MVEBU_ODMI) += irq-mvebu-odmi.o
obj-$(CONFIG_LS_SCFG_MSI) += irq-ls-scfg-msi.o
obj-$(CONFIG_EZNPS_GIC) += irq-eznps.o
-obj-$(CONFIG_RENESAS_SH_INTC) += irq-renesas-sh7751.o
+obj-$(CONFIG_RENESAS_SH_INTC) += irq-renesas-sh7751.o irq-io-landisk.o
diff --git a/drivers/irqchip/irq-io-landisk.c b/drivers/irqchip/irq-io-landisk.c
new file mode 100644
index 0000000..73419a2
--- /dev/null
+++ b/drivers/irqchip/irq-io-landisk.c
@@ -0,0 +1,73 @@
+/*
+ * IO-DATA LANDISK CPLD IRQ driver
+ *
+ * Copyright 2016 Yoshinori Sato <ysato@xxxxxxxxxxxxxxxxxxxx>
+ */
+
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <linux/irqchip.h>
+#include <linux/irqdomain.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/io.h>
+
+static void landisk_mask_irq(struct irq_data *data)
+{
+ u8 mask = __raw_readb(data->chip_data + 5);
+
+ mask &= ~(1 << (data->irq - 5));
+ __raw_writeb(mask, data->chip_data + 5);
+}
+
+static void landisk_unmask_irq(struct irq_data *data)
+{
+ u8 mask = __raw_readb(data->chip_data + 5);
+
+ mask |= (1 << (data->irq - 5));
+ __raw_writeb(mask, data->chip_data + 5);
+}
+
+static struct irq_chip cpld_irq_chip = {
+ .name = "LANDISK-CPLD",
+ .irq_unmask = landisk_unmask_irq,
+ .irq_mask = landisk_mask_irq,
+};
+
+static int cpld_map(struct irq_domain *d, unsigned int virq,
+ irq_hw_number_t hw_irq_num)
+{
+ irq_set_chip_and_handler(virq, &cpld_irq_chip,
+ handle_simple_irq);
+ irq_set_chip_data(virq, d->host_data);
+
+ return 0;
+}
+
+static struct irq_domain_ops irq_ops = {
+ .xlate = irq_domain_xlate_onecell,
+ .map = cpld_map,
+};
+
+static int __init landisk_intc_of_init(struct device_node *intc,
+ struct device_node *parent)
+{
+ struct irq_domain *domain, *pdomain;
+ int num_irqpin;
+ void *baseaddr;
+
+ baseaddr = of_iomap(intc, 0);
+ pdomain = irq_find_host(parent);
+ of_get_property(intc, "interrupt-map", &num_irqpin);
+ num_irqpin /= sizeof(u32) * 3;
+ printk("%s %d\n", __func__, num_irqpin);
+ domain = irq_domain_create_hierarchy(pdomain, 0, num_irqpin,
+ of_node_to_fwnode(intc),
+ &irq_ops, baseaddr);
+ if (!domain)
+ panic("%s: unable to create IRQ domain\n", intc->full_name);
+ irq_domain_associate_many(domain, 5, 0, 8);
+ return 0;
+}
+
+IRQCHIP_DECLARE(cpld_intc, "iodata,landisk-intc", landisk_intc_of_init);
--
2.7.0