[PATCH V3] irqchip: Add TB10x interrupt controller driver

From: Christian Ruppert
Date: Fri May 31 2013 - 11:33:54 EST

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The SOC interrupt controller driver for the Abilis Systems TB10x series of
SOCs based on ARC700 CPUs.

This patch depends on commits eb76bdd407d8a90e59a06cb0158886df390e5d1c and
712bc93df9e7f14b8a163148d2aa7c778e151627 from branch irq/for-arm of
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git.

Signed-off-by: Christian Ruppert <christian.ruppert@xxxxxxxxxx>
Signed-off-by: Pierrick Hascoet <pierrick.hascoet@xxxxxxxxxx>
---
.../interrupt-controller/abilis,tb10x-ictl.txt | 38 ++++
arch/arc/boot/dts/abilis_tb100.dtsi | 32 ++--
arch/arc/boot/dts/abilis_tb101.dtsi | 32 ++--
arch/arc/boot/dts/abilis_tb10x.dtsi | 32 ++--
arch/arc/plat-tb10x/Kconfig | 1 +
drivers/irqchip/Kconfig | 5 +
drivers/irqchip/Makefile | 1 +
drivers/irqchip/irq-tb10x.c | 195 ++++++++++++++++++++
8 files changed, 282 insertions(+), 54 deletions(-)
create mode 100644 Documentation/devicetree/bindings/interrupt-controller/abilis,tb10x-ictl.txt
create mode 100644 drivers/irqchip/irq-tb10x.c

diff --git a/Documentation/devicetree/bindings/interrupt-controller/abilis,tb10x-ictl.txt b/Documentation/devicetree/bindings/interrupt-controller/abilis,tb10x-ictl.txt
new file mode 100644
index 0000000..9d52d5a
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/abilis,tb10x-ictl.txt
@@ -0,0 +1,38 @@
+TB10x Top Level Interrupt Controller
+====================================
+
+The Abilis TB10x SOC contains a custom interrupt controller. It performs
+one-to-one mapping of external interrupt sources to CPU interrupts and
+provides support for reconfigurable trigger modes.
+
+Required properties
+-------------------
+
+- compatible: Should be "abilis,tb10x-ictl"
+- reg: specifies physical base address and size of register range.
+- interrupt-congroller: Identifies the node as an interrupt controller.
+- #interrupt cells: Specifies the number of cells used to encode an interrupt
+ source connected to this controller. The value shall be 2.
+- interrupt-parent: Specifies the parent interrupt controller.
+- interrupts: Specifies the list of interrupt lines which are handled by
+ the interrupt controller in the parent controller's notation. Interrupts
+ are mapped one-to-one to parent interrupts.
+
+Example
+-------
+
+intc: interrupt-controller { /* Parent interrupt controller */
+ interrupt-controller;
+ #interrupt-cells = <1>; /* For example below */
+ /* ... */
+};
+
+tb10x_ictl: pic@2000 { /* TB10x interrupt controller */
+ compatible = "abilis,tb10x-ictl";
+ reg = <0x2000 0x20>;
+ interrupt-controller;
+ #interrupt-cells = <2>;
+ interrupt-parent = <&intc>;
+ interrupts = <5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
+ 20 21 22 23 24 25 26 27 28 29 30 31>;
+};
diff --git a/arch/arc/boot/dts/abilis_tb100.dtsi b/arch/arc/boot/dts/abilis_tb100.dtsi
index 941ad11..d9f8249 100644
--- a/arch/arc/boot/dts/abilis_tb100.dtsi
+++ b/arch/arc/boot/dts/abilis_tb100.dtsi
@@ -21,10 +21,6 @@

/include/ "abilis_tb10x.dtsi"

-/* interrupt specifiers
- * --------------------
- * 0: rising, 1: low, 2: high, 3: falling,
- */

/ {
clock-frequency = <500000000>; /* 500 MHZ */
@@ -173,7 +169,7 @@
interrupt-controller;
#interrupt-cells = <1>;
interrupt-parent = <&tb10x_ictl>;
- interrupts = <27 1>;
+ interrupts = <27 2>;
reg = <0xFF140000 0x1000>;
gpio-controller;
#gpio-cells = <1>;
@@ -185,7 +181,7 @@
interrupt-controller;
#interrupt-cells = <1>;
interrupt-parent = <&tb10x_ictl>;
- interrupts = <27 1>;
+ interrupts = <27 2>;
reg = <0xFF141000 0x1000>;
gpio-controller;
#gpio-cells = <1>;
@@ -197,7 +193,7 @@
interrupt-controller;
#interrupt-cells = <1>;
interrupt-parent = <&tb10x_ictl>;
- interrupts = <27 1>;
+ interrupts = <27 2>;
reg = <0xFF142000 0x1000>;
gpio-controller;
#gpio-cells = <1>;
@@ -209,7 +205,7 @@
interrupt-controller;
#interrupt-cells = <1>;
interrupt-parent = <&tb10x_ictl>;
- interrupts = <27 1>;
+ interrupts = <27 2>;
reg = <0xFF143000 0x1000>;
gpio-controller;
#gpio-cells = <1>;
@@ -221,7 +217,7 @@
interrupt-controller;
#interrupt-cells = <1>;
interrupt-parent = <&tb10x_ictl>;
- interrupts = <27 1>;
+ interrupts = <27 2>;
reg = <0xFF144000 0x1000>;
gpio-controller;
#gpio-cells = <1>;
@@ -233,7 +229,7 @@
interrupt-controller;
#interrupt-cells = <1>;
interrupt-parent = <&tb10x_ictl>;
- interrupts = <27 1>;
+ interrupts = <27 2>;
reg = <0xFF145000 0x1000>;
gpio-controller;
#gpio-cells = <1>;
@@ -245,7 +241,7 @@
interrupt-controller;
#interrupt-cells = <1>;
interrupt-parent = <&tb10x_ictl>;
- interrupts = <27 1>;
+ interrupts = <27 2>;
reg = <0xFF146000 0x1000>;
gpio-controller;
#gpio-cells = <1>;
@@ -257,7 +253,7 @@
interrupt-controller;
#interrupt-cells = <1>;
interrupt-parent = <&tb10x_ictl>;
- interrupts = <27 1>;
+ interrupts = <27 2>;
reg = <0xFF147000 0x1000>;
gpio-controller;
#gpio-cells = <1>;
@@ -269,7 +265,7 @@
interrupt-controller;
#interrupt-cells = <1>;
interrupt-parent = <&tb10x_ictl>;
- interrupts = <27 1>;
+ interrupts = <27 2>;
reg = <0xFF148000 0x1000>;
gpio-controller;
#gpio-cells = <1>;
@@ -281,7 +277,7 @@
interrupt-controller;
#interrupt-cells = <1>;
interrupt-parent = <&tb10x_ictl>;
- interrupts = <27 1>;
+ interrupts = <27 2>;
reg = <0xFF149000 0x1000>;
gpio-controller;
#gpio-cells = <1>;
@@ -293,7 +289,7 @@
interrupt-controller;
#interrupt-cells = <1>;
interrupt-parent = <&tb10x_ictl>;
- interrupts = <27 1>;
+ interrupts = <27 2>;
reg = <0xFF14A000 0x1000>;
gpio-controller;
#gpio-cells = <1>;
@@ -305,7 +301,7 @@
interrupt-controller;
#interrupt-cells = <1>;
interrupt-parent = <&tb10x_ictl>;
- interrupts = <27 1>;
+ interrupts = <27 2>;
reg = <0xFF14B000 0x1000>;
gpio-controller;
#gpio-cells = <1>;
@@ -317,7 +313,7 @@
interrupt-controller;
#interrupt-cells = <1>;
interrupt-parent = <&tb10x_ictl>;
- interrupts = <27 1>;
+ interrupts = <27 2>;
reg = <0xFF14C000 0x1000>;
gpio-controller;
#gpio-cells = <1>;
@@ -329,7 +325,7 @@
interrupt-controller;
#interrupt-cells = <1>;
interrupt-parent = <&tb10x_ictl>;
- interrupts = <27 1>;
+ interrupts = <27 2>;
reg = <0xFF14D000 0x1000>;
gpio-controller;
#gpio-cells = <1>;
diff --git a/arch/arc/boot/dts/abilis_tb101.dtsi b/arch/arc/boot/dts/abilis_tb101.dtsi
index fd25c21..da8ca79 100644
--- a/arch/arc/boot/dts/abilis_tb101.dtsi
+++ b/arch/arc/boot/dts/abilis_tb101.dtsi
@@ -21,10 +21,6 @@

/include/ "abilis_tb10x.dtsi"

-/* interrupt specifiers
- * --------------------
- * 0: rising, 1: low, 2: high, 3: falling,
- */

/ {
clock-frequency = <500000000>; /* 500 MHZ */
@@ -182,7 +178,7 @@
interrupt-controller;
#interrupt-cells = <1>;
interrupt-parent = <&tb10x_ictl>;
- interrupts = <27 1>;
+ interrupts = <27 2>;
reg = <0xFF140000 0x1000>;
gpio-controller;
#gpio-cells = <1>;
@@ -194,7 +190,7 @@
interrupt-controller;
#interrupt-cells = <1>;
interrupt-parent = <&tb10x_ictl>;
- interrupts = <27 1>;
+ interrupts = <27 2>;
reg = <0xFF141000 0x1000>;
gpio-controller;
#gpio-cells = <1>;
@@ -206,7 +202,7 @@
interrupt-controller;
#interrupt-cells = <1>;
interrupt-parent = <&tb10x_ictl>;
- interrupts = <27 1>;
+ interrupts = <27 2>;
reg = <0xFF142000 0x1000>;
gpio-controller;
#gpio-cells = <1>;
@@ -218,7 +214,7 @@
interrupt-controller;
#interrupt-cells = <1>;
interrupt-parent = <&tb10x_ictl>;
- interrupts = <27 1>;
+ interrupts = <27 2>;
reg = <0xFF143000 0x1000>;
gpio-controller;
#gpio-cells = <1>;
@@ -230,7 +226,7 @@
interrupt-controller;
#interrupt-cells = <1>;
interrupt-parent = <&tb10x_ictl>;
- interrupts = <27 1>;
+ interrupts = <27 2>;
reg = <0xFF144000 0x1000>;
gpio-controller;
#gpio-cells = <1>;
@@ -242,7 +238,7 @@
interrupt-controller;
#interrupt-cells = <1>;
interrupt-parent = <&tb10x_ictl>;
- interrupts = <27 1>;
+ interrupts = <27 2>;
reg = <0xFF145000 0x1000>;
gpio-controller;
#gpio-cells = <1>;
@@ -254,7 +250,7 @@
interrupt-controller;
#interrupt-cells = <1>;
interrupt-parent = <&tb10x_ictl>;
- interrupts = <27 1>;
+ interrupts = <27 2>;
reg = <0xFF146000 0x1000>;
gpio-controller;
#gpio-cells = <1>;
@@ -266,7 +262,7 @@
interrupt-controller;
#interrupt-cells = <1>;
interrupt-parent = <&tb10x_ictl>;
- interrupts = <27 1>;
+ interrupts = <27 2>;
reg = <0xFF147000 0x1000>;
gpio-controller;
#gpio-cells = <1>;
@@ -278,7 +274,7 @@
interrupt-controller;
#interrupt-cells = <1>;
interrupt-parent = <&tb10x_ictl>;
- interrupts = <27 1>;
+ interrupts = <27 2>;
reg = <0xFF148000 0x1000>;
gpio-controller;
#gpio-cells = <1>;
@@ -290,7 +286,7 @@
interrupt-controller;
#interrupt-cells = <1>;
interrupt-parent = <&tb10x_ictl>;
- interrupts = <27 1>;
+ interrupts = <27 2>;
reg = <0xFF149000 0x1000>;
gpio-controller;
#gpio-cells = <1>;
@@ -302,7 +298,7 @@
interrupt-controller;
#interrupt-cells = <1>;
interrupt-parent = <&tb10x_ictl>;
- interrupts = <27 1>;
+ interrupts = <27 2>;
reg = <0xFF14A000 0x1000>;
gpio-controller;
#gpio-cells = <1>;
@@ -314,7 +310,7 @@
interrupt-controller;
#interrupt-cells = <1>;
interrupt-parent = <&tb10x_ictl>;
- interrupts = <27 1>;
+ interrupts = <27 2>;
reg = <0xFF14B000 0x1000>;
gpio-controller;
#gpio-cells = <1>;
@@ -326,7 +322,7 @@
interrupt-controller;
#interrupt-cells = <1>;
interrupt-parent = <&tb10x_ictl>;
- interrupts = <27 1>;
+ interrupts = <27 2>;
reg = <0xFF14C000 0x1000>;
gpio-controller;
#gpio-cells = <1>;
@@ -338,7 +334,7 @@
interrupt-controller;
#interrupt-cells = <1>;
interrupt-parent = <&tb10x_ictl>;
- interrupts = <27 1>;
+ interrupts = <27 2>;
reg = <0xFF14D000 0x1000>;
gpio-controller;
#gpio-cells = <1>;
diff --git a/arch/arc/boot/dts/abilis_tb10x.dtsi b/arch/arc/boot/dts/abilis_tb10x.dtsi
index b97e305..edf56f4 100644
--- a/arch/arc/boot/dts/abilis_tb10x.dtsi
+++ b/arch/arc/boot/dts/abilis_tb10x.dtsi
@@ -19,10 +19,6 @@
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/

-/* interrupt specifiers
- * --------------------
- * 0: rising, 1: low, 2: high, 3: falling,
- */

/ {
compatible = "abilis,arc-tb10x";
@@ -78,7 +74,7 @@
#interrupt-cells = <1>;
};
tb10x_ictl: pic@fe002000 {
- compatible = "abilis,tb10x_ictl";
+ compatible = "abilis,tb10x-ictl";
reg = <0xFE002000 0x20>;
interrupt-controller;
#interrupt-cells = <2>;
@@ -91,7 +87,7 @@
compatible = "snps,dw-apb-uart";
reg = <0xFF100000 0x100>;
clock-frequency = <166666666>;
- interrupts = <25 1>;
+ interrupts = <25 8>;
reg-shift = <2>;
reg-io-width = <4>;
interrupt-parent = <&tb10x_ictl>;
@@ -100,7 +96,7 @@
compatible = "snps,dwmac-3.70a","snps,dwmac";
reg = <0xFE100000 0x1058>;
interrupt-parent = <&tb10x_ictl>;
- interrupts = <6 1>;
+ interrupts = <6 8>;
interrupt-names = "macirq";
clocks = <&ahb_clk>;
clock-names = "stmmaceth";
@@ -109,7 +105,7 @@
compatible = "snps,dma-spear1340";
reg = <0xFE000000 0x400>;
interrupt-parent = <&tb10x_ictl>;
- interrupts = <14 1>;
+ interrupts = <14 8>;
dma-channels = <6>;
dma-requests = <0>;
dma-masters = <1>;
@@ -128,7 +124,7 @@
compatible = "snps,designware-i2c";
reg = <0xFF120000 0x1000>;
interrupt-parent = <&tb10x_ictl>;
- interrupts = <12 1>;
+ interrupts = <12 8>;
clocks = <&ahb_clk>;
};
i2c1: i2c@FF121000 {
@@ -137,7 +133,7 @@
compatible = "snps,designware-i2c";
reg = <0xFF121000 0x1000>;
interrupt-parent = <&tb10x_ictl>;
- interrupts = <12 1>;
+ interrupts = <12 8>;
clocks = <&ahb_clk>;
};
i2c2: i2c@FF122000 {
@@ -146,7 +142,7 @@
compatible = "snps,designware-i2c";
reg = <0xFF122000 0x1000>;
interrupt-parent = <&tb10x_ictl>;
- interrupts = <12 1>;
+ interrupts = <12 8>;
clocks = <&ahb_clk>;
};
i2c3: i2c@FF123000 {
@@ -155,7 +151,7 @@
compatible = "snps,designware-i2c";
reg = <0xFF123000 0x1000>;
interrupt-parent = <&tb10x_ictl>;
- interrupts = <12 1>;
+ interrupts = <12 8>;
clocks = <&ahb_clk>;
};
i2c4: i2c@FF124000 {
@@ -164,7 +160,7 @@
compatible = "snps,designware-i2c";
reg = <0xFF124000 0x1000>;
interrupt-parent = <&tb10x_ictl>;
- interrupts = <12 1>;
+ interrupts = <12 8>;
clocks = <&ahb_clk>;
};

@@ -176,7 +172,7 @@
num-cs = <1>;
reg = <0xFE010000 0x20>;
interrupt-parent = <&tb10x_ictl>;
- interrupts = <26 1>;
+ interrupts = <26 8>;
clocks = <&ahb_clk>;
};
spi1: spi@0xFE011000 {
@@ -187,7 +183,7 @@
num-cs = <2>;
reg = <0xFE011000 0x20>;
interrupt-parent = <&tb10x_ictl>;
- interrupts = <10 1>;
+ interrupts = <10 8>;
clocks = <&ahb_clk>;
};

@@ -195,7 +191,7 @@
compatible = "abilis,tb100-tsm";
reg = <0xff316000 0x400>;
interrupt-parent = <&tb10x_ictl>;
- interrupts = <17 1>;
+ interrupts = <17 8>;
output-clkdiv = <4>;
global-packet-delay = <0x21>;
port-packet-delay = <0>;
@@ -213,7 +209,7 @@
"cpuctrl",
"a6it_int_force";
interrupt-parent = <&tb10x_ictl>;
- interrupts = <20 1>, <19 1>;
+ interrupts = <20 2>, <19 2>;
interrupt-names = "cmd_irq", "event_irq";
};
tb10x_mdsc0: tb10x-mdscr@FF300000 {
@@ -239,7 +235,7 @@
compatible = "abilis,tb100-wfb";
reg = <0xff319000 0x1000>;
interrupt-parent = <&tb10x_ictl>;
- interrupts = <16 1>;
+ interrupts = <16 8>;
};
};
};
diff --git a/arch/arc/plat-tb10x/Kconfig b/arch/arc/plat-tb10x/Kconfig
index 1d34521..1ab386b 100644
--- a/arch/arc/plat-tb10x/Kconfig
+++ b/arch/arc/plat-tb10x/Kconfig
@@ -22,6 +22,7 @@ menuconfig ARC_PLAT_TB10X
select PINCTRL
select PINMUX
select ARCH_REQUIRE_GPIOLIB
+ select TB10X_IRQC
help
Support for platforms based on the TB10x home media gateway SOC by
Abilis Systems. TB10x is based on the ARC700 CPU architecture.
diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig
index 4a33351..8843f21 100644
--- a/drivers/irqchip/Kconfig
+++ b/drivers/irqchip/Kconfig
@@ -33,6 +33,11 @@ config RENESAS_IRQC
bool
select IRQ_DOMAIN

+config TB10X_IRQC
+ bool
+ select IRQ_DOMAIN
+ select GENERIC_IRQ_CHIP
+
config VERSATILE_FPGA_IRQ
bool
select IRQ_DOMAIN
diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile
index cda4cb5..b45e4a4 100644
--- a/drivers/irqchip/Makefile
+++ b/drivers/irqchip/Makefile
@@ -9,6 +9,7 @@ obj-$(CONFIG_METAG) += irq-metag-ext.o
obj-$(CONFIG_METAG_PERFCOUNTER_IRQS) += irq-metag.o
obj-$(CONFIG_ARCH_SUNXI) += irq-sun4i.o
obj-$(CONFIG_ARCH_SPEAR3XX) += spear-shirq.o
+obj-$(CONFIG_TB10X_IRQC) += irq-tb10x.o
obj-$(CONFIG_ARM_GIC) += irq-gic.o
obj-$(CONFIG_ARM_VIC) += irq-vic.o
obj-$(CONFIG_SIRF_IRQ) += irq-sirfsoc.o
diff --git a/drivers/irqchip/irq-tb10x.c b/drivers/irqchip/irq-tb10x.c
new file mode 100644
index 0000000..7c44c99
--- /dev/null
+++ b/drivers/irqchip/irq-tb10x.c
@@ -0,0 +1,195 @@
+/*
+ * Abilis Systems interrupt controller driver
+ *
+ * Copyright (C) Abilis Systems 2012
+ *
+ * Author: Christian Ruppert <christian.ruppert@xxxxxxxxxx>
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/interrupt.h>
+#include <linux/irqdomain.h>
+#include <linux/irq.h>
+#include <linux/of_irq.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/bitops.h>
+#include "irqchip.h"
+
+#define AB_IRQCTL_INT_ENABLE 0x00
+#define AB_IRQCTL_INT_STATUS 0x04
+#define AB_IRQCTL_SRC_MODE 0x08
+#define AB_IRQCTL_SRC_POLARITY 0x0C
+#define AB_IRQCTL_INT_MODE 0x10
+#define AB_IRQCTL_INT_POLARITY 0x14
+#define AB_IRQCTL_INT_FORCE 0x18
+
+#define AB_IRQCTL_MAXIRQ 32
+
+static inline void ab_irqctl_writereg(struct irq_chip_generic *gc, u32 reg,
+ u32 val)
+{
+ irq_reg_writel(val, gc->reg_base + reg);
+}
+
+static inline u32 ab_irqctl_readreg(struct irq_chip_generic *gc, u32 reg)
+{
+ return irq_reg_readl(gc->reg_base + reg);
+}
+
+static int tb10x_irq_set_type(struct irq_data *data, unsigned int flow_type)
+{
+ struct irq_chip_generic *gc = irq_data_get_irq_chip_data(data);
+ uint32_t im, mod, pol;
+
+ im = data->mask;
+
+ irq_gc_lock(gc);
+
+ mod = ab_irqctl_readreg(gc, AB_IRQCTL_SRC_MODE) | im;
+ pol = ab_irqctl_readreg(gc, AB_IRQCTL_SRC_POLARITY) | im;
+
+ switch (flow_type & IRQF_TRIGGER_MASK) {
+ case IRQ_TYPE_EDGE_FALLING:
+ pol ^= im;
+ break;
+ case IRQ_TYPE_LEVEL_HIGH:
+ mod ^= im;
+ break;
+ case IRQ_TYPE_NONE:
+ flow_type = IRQ_TYPE_LEVEL_LOW;
+ case IRQ_TYPE_LEVEL_LOW:
+ mod ^= im;
+ pol ^= im;
+ break;
+ case IRQ_TYPE_EDGE_RISING:
+ break;
+ default:
+ irq_gc_unlock(gc);
+ pr_err("%s: Cannot assign multiple trigger modes to IRQ %d.\n",
+ __func__, data->irq);
+ return -EBADR;
+ }
+
+ irqd_set_trigger_type(data, flow_type);
+ irq_setup_alt_chip(data, flow_type);
+
+ ab_irqctl_writereg(gc, AB_IRQCTL_SRC_MODE, mod);
+ ab_irqctl_writereg(gc, AB_IRQCTL_SRC_POLARITY, pol);
+ ab_irqctl_writereg(gc, AB_IRQCTL_INT_STATUS, im);
+
+ irq_gc_unlock(gc);
+
+ return IRQ_SET_MASK_OK;
+}
+
+static void tb10x_irq_cascade(unsigned int irq, struct irq_desc *desc)
+{
+ struct irq_domain *domain = irq_desc_get_handler_data(desc);
+
+ generic_handle_irq(irq_find_mapping(domain, irq));
+}
+
+static int __init of_tb10x_init_irq(struct device_node *ictl,
+ struct device_node *parent)
+{
+ int i, ret, nrirqs = of_irq_count(ictl);
+ struct resource mem;
+ struct irq_chip_generic *gc;
+ struct irq_domain *domain;
+ void __iomem *reg_base;
+
+ if (of_address_to_resource(ictl, 0, &mem)) {
+ pr_err("%s: No registers declared in DeviceTree.\n",
+ ictl->name);
+ return -EINVAL;
+ }
+
+ if (!request_mem_region(mem.start, resource_size(&mem),
+ ictl->name)) {
+ pr_err("%s: Request mem region failed.\n", ictl->name);
+ return -EBUSY;
+ }
+
+ reg_base = ioremap(mem.start, resource_size(&mem));
+ if (!reg_base) {
+ ret = -EBUSY;
+ pr_err("%s: ioremap failed.\n", ictl->name);
+ goto ioremap_fail;
+ }
+
+ domain = irq_domain_add_linear(ictl, AB_IRQCTL_MAXIRQ,
+ &irq_generic_chip_ops, NULL);
+ if (!domain) {
+ ret = -ENOMEM;
+ pr_err("%s: Could not register interrupt domain.\n",
+ ictl->name);
+ goto irq_domain_add_fail;
+ }
+
+ ret = irq_alloc_domain_generic_chips(domain, AB_IRQCTL_MAXIRQ,
+ 2, ictl->name, handle_level_irq,
+ IRQ_NOREQUEST, IRQ_NOPROBE,
+ IRQ_GC_INIT_MASK_CACHE);
+ if (ret) {
+ pr_err("%s: Could not allocate generic interrupt chip.\n",
+ ictl->name);
+ goto gc_alloc_fail;
+ }
+
+ gc = domain->gc->gc[0];
+ gc->reg_base = reg_base;
+
+ gc->chip_types[0].type = IRQ_TYPE_LEVEL_MASK;
+ gc->chip_types[0].chip.irq_mask = irq_gc_mask_clr_bit;
+ gc->chip_types[0].chip.irq_unmask = irq_gc_mask_set_bit;
+ gc->chip_types[0].chip.irq_set_type = tb10x_irq_set_type;
+ gc->chip_types[0].regs.mask = AB_IRQCTL_INT_ENABLE;
+
+ gc->chip_types[1].type = IRQ_TYPE_EDGE_BOTH;
+ gc->chip_types[1].chip.name = gc->chip_types[0].chip.name;
+ gc->chip_types[1].chip.irq_ack = irq_gc_ack_set_bit;
+ gc->chip_types[1].chip.irq_mask = irq_gc_mask_clr_bit;
+ gc->chip_types[1].chip.irq_unmask = irq_gc_mask_set_bit;
+ gc->chip_types[1].chip.irq_set_type = tb10x_irq_set_type;
+ gc->chip_types[1].regs.ack = AB_IRQCTL_INT_STATUS;
+ gc->chip_types[1].regs.mask = AB_IRQCTL_INT_ENABLE;
+ gc->chip_types[1].handler = handle_edge_irq;
+
+ for (i = 0; i < nrirqs; i++) {
+ unsigned int irq = irq_of_parse_and_map(ictl, i);
+
+ irq_set_handler_data(irq, domain);
+ irq_set_chained_handler(irq, tb10x_irq_cascade);
+ }
+
+ ab_irqctl_writereg(gc, AB_IRQCTL_INT_ENABLE, 0);
+ ab_irqctl_writereg(gc, AB_IRQCTL_INT_MODE, 0);
+ ab_irqctl_writereg(gc, AB_IRQCTL_INT_POLARITY, 0);
+ ab_irqctl_writereg(gc, AB_IRQCTL_INT_STATUS, ~0UL);
+
+ return 0;
+
+gc_alloc_fail:
+ irq_domain_remove(domain);
+irq_domain_add_fail:
+ iounmap(reg_base);
+ioremap_fail:
+ release_mem_region(mem.start, resource_size(&mem));
+ return ret;
+}
+IRQCHIP_DECLARE(tb10x_intc, "abilis,tb10x-ictl", of_tb10x_init_irq);
--
1.7.1

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