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Message-Id: <1370014348-21121-1-git-send-email-christian.ruppert@abilis.com>
Date: Fri, 31 May 2013 17:32:28 +0200
From: Christian Ruppert <christian.ruppert@...lis.com>
To: Thomas Gleixner <tglx@...utronix.de>
Cc: Vineet Gupta <Vineet.Gupta1@...opsys.com>,
Grant Likely <grant.likely@...retlab.ca>,
Rob Herring <rob.herring@...xeda.com>,
Rob Landley <rob@...dley.net>,
devicetree-discuss@...ts.ozlabs.org, linux-doc@...r.kernel.org,
linux-kernel@...r.kernel.org,
Christian Ruppert <christian.ruppert@...lis.com>,
Pierrick Hascoet <pierrick.hascoet@...lis.com>
Subject: [PATCH V3] irqchip: Add TB10x interrupt controller driver
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@...lis.com>
Signed-off-by: Pierrick Hascoet <pierrick.hascoet@...lis.com>
---
.../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@...0 { /* 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@...02000 {
- 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@...21000 {
@@ -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@...22000 {
@@ -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@...23000 {
@@ -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@...24000 {
@@ -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@...E011000 {
@@ -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@...00000 {
@@ -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@...lis.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.
+ *
+ * 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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