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Message-ID: <578E37C9.8090907@laposte.net>
Date: Tue, 19 Jul 2016 16:23:05 +0200
From: Sebastian Frias <sf84@...oste.net>
To: Marc Zyngier <marc.zyngier@....com>,
Jason Cooper <jason@...edaemon.net>,
Thomas Gleixner <tglx@...utronix.de>
Cc: Mason <slash.tmp@...e.fr>, LKML <linux-kernel@...r.kernel.org>
Subject: [RFC PATCH v2] irqchip: add support for SMP irq router
This adds support for a second-gen irq router/controller present
on some Sigma Designs chips.
Signed-off-by: Sebastian Frias <sf84@...oste.net>
---
This is RFC v2 attempts to address the comments given on the previous
RFC:
- domains used to be created by the DT, now they are created internally
by the driver:
https://marc.info/?l=linux-kernel&m=146773883324507&w=2
- IRQ sharing (which does not seems to be handled by current DT spec,
https://marc.info/?l=linux-kernel&m=146779759405950&w=2) is implemented
as:
- explicit grouping: https://marc.info/?l=linux-kernel&m=146781302410442&w=2
- implicit grouping: https://marc.info/?l=linux-kernel&m=146780217707395&w=2
However, I still have a few doubts:
1) I have implemented two ways of declaring the IRQ sharing, implicit and
explicit IRQ grouping, see:
Documentation/devicetree/bindings/interrupt-controller/sigma,smp,irqrouter.txt
for more information.
Since it is still not clear how this is going to be used, I prefer to keep
both available for the moment.
2) In order to get a virq mapping for the domains associated with the outputs
(the outputs connected to the GIC) I request a sort of "Fake HW IRQ"
See irq-tango_v4.c:1400
/* To request a virq we need a HW IRQ, use a "Fake HW IRQ" */
hwirq = index + irqrouter->input_count + irqrouter->swirq_count;
This feels a bit like a hack, so suggestions are welcome.
3) The file is called 'irq-tango_v4.c' but I think it should match the
compatible string, so I was thinking of renaming:
irq-tango_v4.c => irq-sigma_smp_irqrouter.c
irq-tango_v4.h => irq-sigma_smp_irqrouter.h
What do you think?
4) Do I have to do something more to handle the affinity stuff?
5) checkpatch.pl reports a few warnings:
- WARNING: added, moved or deleted file(s), does MAINTAINERS need updating?
I have not changed the file because I would like to be settled on the naming
first (see point 2 above)
- WARNING: quoted string split across lines
I think it is not an issue
- WARNING: line over 80 characters
This is for two big macros, I think it is not an issue
6) More of a theoretical question:
I have to #include <dt-bindings/interrupt-controller/irq-tango_v4.h> from
code that is not in the Linux tree. That's fine for now, but if in the future
there are other irq controllers and another header is required, how can the
code know which header to #include ?
Are we supposed to #include all of them, and then somehow detect which module
is actually active and act accordingly? If so, can we detect which module
matched and probed correctly to know which controller version we need to
talk to?
Please feel free to comment and suggest improvements.
---
.../interrupt-controller/sigma,smp,irqrouter.txt | 135 ++
drivers/irqchip/Makefile | 1 +
drivers/irqchip/irq-tango_v4.c | 1729 ++++++++++++++++++++
.../interrupt-controller/irq-tango_v4.h | 39 +
4 files changed, 1904 insertions(+)
create mode 100644 Documentation/devicetree/bindings/interrupt-controller/sigma,smp,irqrouter.txt
create mode 100644 drivers/irqchip/irq-tango_v4.c
create mode 100644 include/dt-bindings/interrupt-controller/irq-tango_v4.h
diff --git a/Documentation/devicetree/bindings/interrupt-controller/sigma,smp,irqrouter.txt b/Documentation/devicetree/bindings/interrupt-controller/sigma,smp,irqrouter.txt
new file mode 100644
index 0000000..ff7c4d5
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/sigma,smp,irqrouter.txt
@@ -0,0 +1,135 @@
+* Sigma Designs Interrupt Router
+
+This module can route X IRQ inputs and Y SW IRQ inputs into Z IRQ outputs,
+with X+Y>Z.
+For instance X=128, Y=16, Z=24.
+
+Note however that the HW does not latch the IRQ lines, so devices
+connecting to the router are expected to latch their IRQ line by themselves.
+
+SW IRQs can be used by firmware running on different parts of the SoC to
+communicate with the CPU.
+They can be registered by specific drivers, and any entity capable of writing
+to the Interrupt Router registers can trigger and clear these interrupts.
+
+A single node in the device tree is used to describe the Interrupt Router.
+Since X+Y>Z, some IRQ inputs may need to be routed to the same IRQ output,
+thus "sharing the IRQ line".
+
+There are two ways of defining such sharing, either by specifying the number
+of IRQ groups, either by listing the IRQ groups and their contents.
+In the former case the groups are created and named "implicitly", in the
+later case the groups are created "explicitly" by grouping IRQs.
+An IRQ group will share an IRQ output, thus all input IRQs falling into that
+group will share a given IRQ line.
+
+If SW IRQs are enabled ("swirq-count" != 0), they will *ALL* be grouped
+together.
+
+Required properties:
+- compatible: Should be "sigma,smp,irqrouter".
+- interrupt-controller: Identifies the node as an interrupt controller.
+- inputs: The number of IRQ lines entering the router
+- outputs: The number of IRQ lines exiting the router
+- swirq-count: The number of SW IRQs supported. If 0, none is supported.
+- reg: Base address and size of interrupt router registers.
+- #interrupt-cells: Should be <3>. Defines how other nodes will be able to
+interact with this node. The meaning of the cells are
+ * First Cell: SIGMA_HWIRQ, SIGMA_SWIRQ, [SIGMA_IRQGROUP_1, ...,
+SIGMA_IRQGROUP_15].
+ * Second Cell: IRQ ID
+ * Third Cell: IRQ polarity (level high or low).
+
+Optional properties:
+- irq-groups: The number of IRQ groups used.
+NOTE: if present, it forces implicit group definition.
+- irq-group{i}: if 'irq-groups' is not present, then explicit group declaration
+may be required, and can be done by creating child nodes of the form:
+ irq-group0: {
+ shared-irqs = <1 38 56>;
+ };
+NOTE: the number of groups cannot exceed the number of outputs.
+NOTE2: SW IRQs have their own group so the number of total groups is
+'irq-groups'+1.
+- interrupt-parent: pHandle of the parent interrupt controller, if not
+ inherited from the parent node. It should be the GIC.
+
+
+Example:
+
+See Documentation/devicetree/bindings/interrupt-controller/interrupts.txt and
+Documentation/devicetree/bindings/arm/gic.txt for further details.
+
+The following example declares a irqrouter with 128 inputs, 24 outputs, 16
+SW IRQs, declaring 4 implicit IRQ groups, with registers @ 0x6F800 and
+connected to the GIC.
+
+ irqrouter: irqrouter@...00 {
+ compatible = "sigma,smp,irqrouter";
+ reg = <0x6f800 0x800>;
+ interrupt-controller;
+ interrupt-parent = <&gic>;
+
+ #interrupt-cells = <3>;
+
+ inputs = <128>;
+ outputs = <24>;
+ swirq-count = <16>;
+
+ irq-groups = <4>;
+ };
+
+Devices can then request IRQs using:
+
+a) interrupts = <SIGMA_SWIRQ 10 IRQ_TYPE_LEVEL_HIGH>;
+b) interrupts = <SIGMA_HWIRQ 10 IRQ_TYPE_LEVEL_HIGH>;
+c) interrupts = <SIGMA_IRQGROUP_2 10 IRQ_TYPE_LEVEL_HIGH>;
+
+Case a) is for SWIRQs: requests SW IRQ 10
+Case b) is for non-shared HW IRQs: requests HW IRQ 10, the irqrouter will
+assign a direct route from input (10) to a free output reserving an IRQ line on
+the parent Interrupt controller.
+Case c) is for shared HW IRQs: indeed, SIGMA_IRQGROUP_2 is used as ID, thus the
+irqrouter will then route this input (10) to the output assigned to IRQ group 2.
+
+NOTE: SW IRQ 10 and HW IRQ 10 are not the same.
+
+The following example declares the same irqrouter as the preceding example
+but using explicit IRQ group declaration.
+
+ irqrouter: irqrouter@...00 {
+ compatible = "sigma,smp,irqrouter";
+ reg = <0x6f800 0x800>;
+ interrupt-controller;
+ interrupt-parent = <&gic>;
+
+ #interrupt-cells = <3>;
+
+ inputs = <128>;
+ outputs = <24>;
+ swirq-count = <16>;
+
+ irq-group0 {
+ shared-irqs = <1 38 56 11>;
+ };
+
+ irq-group1 {
+ shared-irqs = <67 68>;
+ };
+ };
+
+Devices can then request IRQs using:
+
+d) interrupts = <SIGMA_SWIRQ 10 IRQ_TYPE_LEVEL_HIGH>;
+e) interrupts = <SIGMA_HWIRQ 10 IRQ_TYPE_LEVEL_HIGH>;
+f) interrupts = <SIGMA_HWIRQ 11 IRQ_TYPE_LEVEL_HIGH>;
+
+Case d) is for SWIRQs: requests SW IRQ 10
+Case e) is for non-shared HW IRQs: requests HW IRQ 10, the irqrouter will
+assign a direct route from input (10) to a free output reserving an IRQ line on
+the parent Interrupt controller.
+Case f) is for a shared HW IRQ: indeed, 'irq-group0' lists IRQ 11 as belonging
+to a group ('irq-group0' but it is not really important), thus the irqrouter
+will route this input (11) to the output assigned to IRQ group 'irq-group0'.
+
+NOTE: SW IRQ 10 and HW IRQ 10 are not the same.
diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile
index 4c203b6..2be8c3f 100644
--- a/drivers/irqchip/Makefile
+++ b/drivers/irqchip/Makefile
@@ -47,6 +47,7 @@ obj-$(CONFIG_ARCH_NSPIRE) += irq-zevio.o
obj-$(CONFIG_ARCH_VT8500) += irq-vt8500.o
obj-$(CONFIG_ST_IRQCHIP) += irq-st.o
obj-$(CONFIG_TANGO_IRQ) += irq-tango.o
+obj-$(CONFIG_TANGO_IRQ) += irq-tango_v4.o
obj-$(CONFIG_TB10X_IRQC) += irq-tb10x.o
obj-$(CONFIG_TS4800_IRQ) += irq-ts4800.o
obj-$(CONFIG_XTENSA) += irq-xtensa-pic.o
diff --git a/drivers/irqchip/irq-tango_v4.c b/drivers/irqchip/irq-tango_v4.c
new file mode 100644
index 0000000..51d8c0f
--- /dev/null
+++ b/drivers/irqchip/irq-tango_v4.c
@@ -0,0 +1,1729 @@
+/*
+ * Copyright (C) 2014 Sebastian Frias <sf84@...oste.net>
+ *
+ * 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/init.h>
+#include <linux/irq.h>
+#include <linux/irqchip.h>
+#include <linux/irqchip/chained_irq.h>
+#include <linux/ioport.h>
+#include <linux/io.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/slab.h>
+#include <dt-bindings/interrupt-controller/arm-gic.h>
+#include <dt-bindings/interrupt-controller/irq-tango_v4.h>
+
+
+#define DBGERR(__format, ...) panic("[%s:%d] %s(): " __format, \
+ __FILE__, __LINE__, \
+ __func__, ##__VA_ARGS__)
+
+#define DBGWARN(__format, ...) pr_err("[%s:%d] %s(): " __format, \
+ __FILE__, __LINE__, \
+ __func__, ##__VA_ARGS__)
+
+
+#if 0
+#define DBGLOG(__format, ...) pr_info("[%s:%d] %s(): " __format, \
+ __FILE__, __LINE__, \
+ __func__, ##__VA_ARGS__)
+#else
+#define DBGLOG(__format, ...) do {} while (0)
+#endif
+
+
+/*
+ * HW description: IRQ router
+ *
+ * IMPORTANT NOTE: this hw block is not a "full" interrupt controller
+ * - it does not support edge detection
+ * - it does not latch the inputs (devices are expected to latch their
+ * IRQ output by themselves)
+ *
+ * ---
+ *
+ * CPU block interrupt interface is now 32bits.
+ * The 24 first interrupt bits are generated from the system interrupts
+ * and the 8 msb interrupts are cpu local interrupts :
+ *
+ * IRQs [23:0] tango system irqs.
+ * IRQs [27:24] CPU core cross trigger interface interrupt (1 per core).
+ * IRQs [31:28] CPU core PMU (performance unit) interrupt (1 per core).
+ *
+ * The 24 lsb interrupts are generated through a new interrupt map module
+ * that maps the tango 128 interrupts to those 24 interrupts.
+ * For each of the 128 input system interrupt, one register is dedicated
+ * to program the destination interrupt among the 24 available.
+ * The mapper is configured as follows, starting at address (0x6f800) :
+ *
+ * offset name description
+ * 0x000 irq_in_0_cfg "en"=bit[31]; "inv"=bit[16]; "dest"=bits[4:0]
+ * 0x004 irq_in_1_cfg "en"=bit[31]; "inv"=bit[16]; "dest"=bits[4:0]
+ * .
+ * .
+ * .
+ * 0x1FC irq_in_127_cfg "en"=bit[31]; "inv"=bit[16]; "dest"=bits[4:0]
+ * 0x400 soft_irq_cfg "enable"=bits[15:0]
+ * 0x404 soft_irq_map0 "map3"=bits[28:24]; "map2"=bits[20:16];
+ * "map1"=bits[12:8]; "map0"=bits[4:0]
+ * 0x408 soft_irq_map1 "map7"=bits[28:24]; "map6"=bits[20:16];
+ * "map5"=bits[12:8]; "map4"=bits[4:0]
+ * 0x40C soft_irq_map2 "map11"=bits[28:24]; "map10"=bits[20:16];
+ * "map9"=bits[12:8]; "map8"=bits[4:0]
+ * 0x410 soft_irq_map3 "map15"=bits[28:24]; "map14"=bits[20:16];
+ * "map13"=bits[12:8]; "map12"=bits[4:0]
+ * 0x414 soft_irq_set "set"=bits[15:0]
+ * 0x418 soft_irq_clear "clear"=bits[15:0]
+ * 0x41C read_cpu_irq "cpu_block_irq"=bits[23:0]
+ * 0x420 read_sys_irq0 "system_irq"=bits[31:0]; (irqs: 0->31)
+ * 0x424 read_sys_irq1 "system_irq"=bits[31:0]; (irqs: 32->63)
+ * 0x428 read_sys_irq2 "system_irq"=bits[31:0]; (irqs: 64->95)
+ * 0x42C read_sys_irq3 "system_irq"=bits[31:0]; (irqs: 96->127)
+ *
+ * - "irq_in_N_cfg" : input N mapping :
+ * - "dest" bits[4:0] => set destination interrupt among the 24
+ * output interrupts. (if multiple inputs are mapped to the same output,
+ * result is an OR of the inputs).
+ * - "inv" bit[16] => if set, inverts input interrupt
+ * polarity (active at 0).
+ * - "en" bit[31] => enable interrupt. Acts like a mask on the
+ * input interrupt.
+ * - "soft_irq" : this module supports up to 16 software interrupts.
+ * - "enable" bits[15:0] => enable usage of software IRQs (SIRQ), 1 bit
+ * per SIRQ.
+ * - "soft_irq_mapN" : For each of the 16 soft IRQ (SIRQ), map them in out
+ * IRQ[23:0] vector.
+ * - "mapN" => 5 bits to select where to connect the SIRQ
+ * among the 23 bits output IRQ. (if multiple SIRQ are mapped to the same
+ * output IRQ, result is an OR of those signals).
+ * - "soft_irq_set" : 16bits, write 1 bit at one set the corresponding
+ * SIRQ. Read returns the software SIRQ vector value.
+ * - "soft_irq_clear" : 16bits, write 1 bit at one clear the corresponding
+ * software SIRQ. Read returns the software SIRQ vector value.
+ * - "read_cpu_irq" : 24bits, returns output IRQ value (IRQs connected to
+ * the ARM cluster).
+ * - "read_sys_irqN" : 32bits, returns input system IRQ value before mapping.
+ */
+
+#define ROUTER_INPUTS (128)
+#define ROUTER_OUTPUTS (24)
+#define SWIRQ_COUNT (16)
+
+#define IRQ_ROUTER_ENABLE_MASK (BIT(31))
+#define IRQ_ROUTER_INVERT_MASK (BIT(16))
+
+/* SW irqs */
+#define SWIRQ_ENABLE (0x400)
+#define SWIRQ_MAP_GROUP0 (0x404)
+#define SWIRQ_MAP_GROUP1 (0x408)
+#define SWIRQ_MAP_GROUP2 (0x40C)
+#define SWIRQ_MAP_GROUP3 (0x410)
+#define READ_SWIRQ_STATUS (0x414)
+
+#define READ_SYS_IRQ_GROUP0 (0x420)
+#define READ_SYS_IRQ_GROUP1 (0x424)
+#define READ_SYS_IRQ_GROUP2 (0x428)
+#define READ_SYS_IRQ_GROUP3 (0x42C)
+
+
+#if 0
+#define SHORT_OR_FULL_NAME full_name
+#else
+#define SHORT_OR_FULL_NAME name
+#endif
+
+#define NODE_NAME(__node__) (__node__ ? __node__->SHORT_OR_FULL_NAME : \
+ "<no-node>")
+
+#define BITMASK_VECTOR_SIZE(__count__) (__count__ / 32)
+#define IRQ_TO_OFFSET(__hwirq__) (__hwirq__ * 4)
+
+struct tango_irqrouter;
+
+/*
+ * Maintains the mapping between a Linux virq and a hwirq
+ * on the parent controller.
+ * It is used by tango_irqdomain_map() or tango_irqdomain_hierarchy_alloc()
+ * to setup the route between input IRQ and output IRQ
+ */
+struct tango_irqrouter_output {
+ struct tango_irqrouter *context;
+
+ u32 domain_id;
+
+ u32 hwirq;
+ u32 hwirq_level;
+ u32 virq;
+
+ int shared_count;
+ int *shared_irqs;
+};
+
+/*
+ * Context for the driver
+ */
+struct tango_irqrouter {
+ raw_spinlock_t lock;
+ struct device_node *node;
+ void __iomem *base;
+
+ int input_count;
+ u32 irq_mask[BITMASK_VECTOR_SIZE(ROUTER_INPUTS)];
+ u32 irq_invert_mask[BITMASK_VECTOR_SIZE(ROUTER_INPUTS)];
+
+ int swirq_count;
+ u32 swirq_mask;
+
+ int irqgroup_count;
+ int implicit_groups;
+
+ int output_count;
+ struct tango_irqrouter_output output[ROUTER_OUTPUTS];
+};
+
+
+/******************************************************************************/
+
+/* Register access */
+static inline u32 tango_readl(struct tango_irqrouter *irqrouter,
+ int reg);
+static inline void tango_writel(struct tango_irqrouter *irqrouter,
+ int reg,
+ u32 val);
+/* IRQ enable */
+static inline void tango_set_swirq_enable(struct tango_irqrouter *irqrouter,
+ int swirq,
+ bool enable);
+static inline void tango_set_hwirq_enable(struct tango_irqrouter *irqrouter,
+ int hwirq,
+ bool enable);
+static inline int tango_set_irq_enable(struct tango_irqrouter *irqrouter,
+ int irq_in,
+ bool enable);
+/* IRQ polarity */
+static inline void tango_set_swirq_inversion(struct tango_irqrouter *irqrouter,
+ int swirq,
+ bool invert);
+static inline void tango_set_hwirq_inversion(struct tango_irqrouter *irqrouter,
+ int hwirq,
+ bool invert);
+static inline int tango_set_irq_inversion(struct tango_irqrouter *irqrouter,
+ int irq_in,
+ bool invert);
+/* IRQ routing */
+static inline void tango_set_swirq_route(struct tango_irqrouter *irqrouter,
+ int swirq_in,
+ int irq_out);
+static inline void tango_set_hwirq_route(struct tango_irqrouter *irqrouter,
+ int hwirq_in,
+ int irq_out);
+static inline int tango_set_irq_route(struct tango_irqrouter *irqrouter,
+ int irq_in,
+ int irq_out);
+/* Misc */
+static inline int tango_set_irq_type(struct tango_irqrouter *irqrouter,
+ int hwirq_in,
+ u32 type,
+ u32 parent_type);
+static int tango_get_output_for_hwirq(struct tango_irqrouter *irqrouter,
+ int hwirq_in,
+ struct tango_irqrouter_output **out_val);
+static inline int tango_parse_fwspec(struct irq_domain *domain,
+ struct irq_fwspec *fwspec,
+ u32 *domain_id_out,
+ irq_hw_number_t *irq_out,
+ u32 *type_out);
+
+
+/* 'irqchip' handling callbacks
+ * Used for 'shared' IRQs, i.e.: IRQs that share a GIC input
+ * This driver performs the IRQ dispatch based on the flags
+ */
+static void tango_irqchip_mask_irq(struct irq_data *data);
+static void tango_irqchip_unmask_irq(struct irq_data *data);
+static int tango_irqchip_set_irq_type(struct irq_data *data,
+ unsigned int type);
+#ifdef CONFIG_SMP
+static int tango_irqchip_set_irq_affinity(struct irq_data *data,
+ const struct cpumask *mask_val,
+ bool force);
+#endif
+static inline u32 tango_dispatch_irqs(struct irq_domain *domain,
+ struct irq_desc *desc,
+ u32 status,
+ int base);
+static void tango_irqdomain_handle_cascade_irq(struct irq_desc *desc);
+
+static struct irq_chip tango_irq_chip_shared_ops = {
+ .name = "ROUTER_SHARED_IRQ_HANDLER",
+ .irq_mask = tango_irqchip_mask_irq,
+ .irq_unmask = tango_irqchip_unmask_irq,
+ .irq_set_type = tango_irqchip_set_irq_type,
+#ifdef CONFIG_SMP
+ .irq_set_affinity = tango_irqchip_set_irq_affinity,
+#endif
+};
+
+/* Shared IRQ domain callbacks */
+static int tango_irqdomain_map(struct irq_domain *domain,
+ unsigned int virq,
+ irq_hw_number_t hwirq);
+static int tango_irqdomain_translate(struct irq_domain *domain,
+ struct irq_fwspec *fwspec,
+ unsigned long *out_hwirq,
+ unsigned int *out_type);
+static int tango_irqdomain_select(struct irq_domain *domain,
+ struct irq_fwspec *fwspec,
+ enum irq_domain_bus_token bus_token);
+
+static struct irq_domain_ops tango_irqdomain_ops = {
+ .select = tango_irqdomain_select,
+ .translate = tango_irqdomain_translate,
+ .map = tango_irqdomain_map,
+};
+
+
+/* 'irqrouter' handling callbacks
+ * Used for 'direct' IRQs, i.e.: IRQs that are directly routed to the GIC
+ * This driver does not dispatch the IRQs, the GIC does.
+ */
+static void tango_irqrouter_mask_irq(struct irq_data *data);
+static void tango_irqrouter_unmask_irq(struct irq_data *data);
+static int tango_irqrouter_set_irq_type(struct irq_data *data,
+ unsigned int type);
+
+static struct irq_chip tango_irq_chip_direct_ops = {
+ .name = "ROUTER_DIRECT_IRQ_HANDLER",
+ .irq_eoi = irq_chip_eoi_parent,
+ .irq_mask = tango_irqrouter_mask_irq,
+ .irq_unmask = tango_irqrouter_unmask_irq,
+ .irq_retrigger = irq_chip_retrigger_hierarchy,
+ .irq_set_type = tango_irqrouter_set_irq_type,
+ .flags = IRQCHIP_MASK_ON_SUSPEND |
+ IRQCHIP_SKIP_SET_WAKE,
+#ifdef CONFIG_SMP
+ .irq_set_affinity = irq_chip_set_affinity_parent,
+#endif
+};
+
+/* Direct IRQ domain callbacks */
+static int tango_irqdomain_hierarchy_alloc(struct irq_domain *domain,
+ unsigned int virq,
+ unsigned int nr_irqs,
+ void *data);
+static void tango_irqdomain_hierarchy_free(struct irq_domain *domain,
+ unsigned int virq,
+ unsigned int nr_irqs);
+static int tango_irqdomain_hierarchy_translate(struct irq_domain *domain,
+ struct irq_fwspec *fwspec,
+ unsigned long *out_hwirq,
+ unsigned int *out_type);
+
+static int tango_irqdomain_hierarchy_select(struct irq_domain *domain,
+ struct irq_fwspec *fwspec,
+ enum irq_domain_bus_token bus_tok);
+
+static const struct irq_domain_ops tango_irqdomain_hierarchy_ops = {
+ .select = tango_irqdomain_hierarchy_select,
+ .translate = tango_irqdomain_hierarchy_translate,
+ .alloc = tango_irqdomain_hierarchy_alloc,
+ .free = tango_irqdomain_hierarchy_free,
+};
+
+
+/******************************************************************************/
+
+
+static inline u32 tango_readl(struct tango_irqrouter *irqrouter,
+ int reg)
+{
+ u32 val = readl_relaxed(irqrouter->base + reg);
+ /*DBGLOG("r[0x%08x + 0x%08x = 0x%08x] = 0x%08x\n",
+ irqrouter->base, reg, irqrouter->base + reg, val);*/
+ return val;
+}
+
+
+static inline void tango_writel(struct tango_irqrouter *irqrouter,
+ int reg,
+ u32 val)
+{
+ /*DBGLOG("w[0x%08x + 0x%08x = 0x%08x] = 0x%08x\n",
+ irqrouter->base, reg, irqrouter->base + reg, val);*/
+ writel_relaxed(val, irqrouter->base + reg);
+}
+
+
+static inline void tango_set_swirq_enable(struct tango_irqrouter *irqrouter,
+ int swirq,
+ bool enable)
+{
+ u32 offset = SWIRQ_ENABLE;
+ u32 value = tango_readl(irqrouter, offset);
+ u32 swirq_bit_index = swirq % SWIRQ_COUNT;
+
+#if 1
+ DBGLOG("%smask swirq(in) %d : current regvalue 0x%x\n",
+ enable ? "un":"",
+ swirq, value);
+#endif
+
+ if (enable) {
+ /* unmask swirq */
+ irqrouter->swirq_mask |= (1 << swirq_bit_index);
+ value |= (1 << swirq_bit_index);
+ } else {
+ /* mask swirq */
+ irqrouter->swirq_mask &= ~(1 << swirq_bit_index);
+ value &= ~(1 << swirq_bit_index);
+ }
+
+ tango_writel(irqrouter, offset, value);
+}
+
+
+static inline void tango_set_hwirq_enable(struct tango_irqrouter *irqrouter,
+ int hwirq,
+ bool enable)
+{
+ u32 offset = IRQ_TO_OFFSET(hwirq);
+ u32 value = tango_readl(irqrouter, offset);
+ u32 hwirq_reg_index = hwirq / 32;
+ u32 hwirq_bit_index = hwirq % 32;
+ u32 *enable_mask = &(irqrouter->irq_mask[hwirq_reg_index]);
+
+#if 1
+ DBGLOG("%smask hwirq(in) %d : current regvalue 0x%x\n",
+ enable ? "un":"",
+ hwirq, value);
+#endif
+
+ if (enable) {
+ /* unmask irq */
+ *enable_mask |= (1 << hwirq_bit_index);
+ value |= IRQ_ROUTER_ENABLE_MASK;
+ } else {
+ /* mask irq */
+ *enable_mask &= ~(1 << hwirq_bit_index);
+ value &= ~(IRQ_ROUTER_ENABLE_MASK);
+ }
+
+ tango_writel(irqrouter, offset, value);
+}
+
+
+static inline void tango_set_swirq_inversion(struct tango_irqrouter *irqrouter,
+ int swirq,
+ bool invert)
+{
+
+ DBGLOG("swirq(in) %d %s inverted\n", swirq, invert ? "":"not");
+
+ if (invert)
+ DBGERR("SW IRQs cannot be inverted!\n");
+}
+
+
+static inline void tango_set_hwirq_inversion(struct tango_irqrouter *irqrouter,
+ int hwirq,
+ bool invert)
+{
+ u32 offset = IRQ_TO_OFFSET(hwirq);
+ u32 value = tango_readl(irqrouter, offset);
+ u32 hwirq_reg_index = hwirq / 32;
+ u32 hwirq_bit_index = hwirq % 32;
+ u32 *invert_mask = &(irqrouter->irq_invert_mask[hwirq_reg_index]);
+
+ if (invert) {
+ *invert_mask |= (1 << hwirq_bit_index);
+ value |= IRQ_ROUTER_INVERT_MASK;
+ } else {
+ *invert_mask &= ~(1 << hwirq_bit_index);
+ value &= ~(IRQ_ROUTER_INVERT_MASK);
+ }
+
+ DBGLOG("hwirq(in) %d %s inverted\n", hwirq, invert ? "":"not");
+
+ tango_writel(irqrouter, offset, value);
+}
+
+
+static inline void tango_set_swirq_route(struct tango_irqrouter *irqrouter,
+ int swirq_in,
+ int irq_out)
+{
+ u32 swirq_reg_index = swirq_in / 4;
+ u32 swirq_bit_index = (swirq_in % 4) * 8;
+ u32 mask = ~(0x1f << swirq_bit_index);
+ u32 offset = SWIRQ_MAP_GROUP0 + (swirq_reg_index * 4);
+ u32 value = tango_readl(irqrouter, offset);
+
+ DBGLOG("ri %d, bi %d, mask 0x%x, offset 0x%x, val 0x%x\n",
+ swirq_reg_index,
+ swirq_bit_index,
+ mask,
+ offset,
+ value);
+
+ DBGLOG("route swirq %d => hwirq(out) %d\n", swirq_in, irq_out);
+
+ value &= mask;
+
+ if (irq_out < 0) {
+ tango_set_irq_enable(irqrouter,
+ swirq_in + irqrouter->input_count,
+ 0);
+ } else
+ value |= ((irq_out & 0x1f) << swirq_bit_index);
+
+ tango_writel(irqrouter, offset, value);
+}
+
+
+static inline void tango_set_hwirq_route(struct tango_irqrouter *irqrouter,
+ int irq_in,
+ int irq_out)
+{
+ u32 offset = IRQ_TO_OFFSET(irq_in);
+ u32 value;
+
+ DBGLOG("route hwirq(in) %d => hwirq(out) %d\n", irq_in, irq_out);
+
+ if (irq_out < 0) {
+ tango_set_irq_enable(irqrouter,
+ irq_in,
+ 0);
+ value = 0;
+ } else
+ value = (irq_out & 0x1f);
+
+ tango_writel(irqrouter, offset, value);
+}
+
+
+static inline int tango_set_irq_enable(struct tango_irqrouter *irqrouter,
+ int irq,
+ bool enable)
+{
+ if (irq >= (irqrouter->input_count + irqrouter->swirq_count))
+ return -EINVAL;
+ else if (irq >= irqrouter->input_count)
+ tango_set_swirq_enable(irqrouter,
+ irq - irqrouter->input_count,
+ enable);
+ else
+ tango_set_hwirq_enable(irqrouter,
+ irq,
+ enable);
+ return 0;
+}
+
+
+static inline int tango_set_irq_inversion(struct tango_irqrouter *irqrouter,
+ int irq_in,
+ bool invert)
+{
+ if (irq_in >= (irqrouter->input_count + irqrouter->swirq_count))
+ return -EINVAL;
+ else if (irq_in >= irqrouter->input_count)
+ tango_set_swirq_inversion(irqrouter,
+ irq_in - irqrouter->input_count,
+ invert);
+ else
+ tango_set_hwirq_inversion(irqrouter,
+ irq_in,
+ invert);
+ return 0;
+}
+
+
+static inline int tango_set_irq_route(struct tango_irqrouter *irqrouter,
+ int irq_in,
+ int irq_out)
+{
+ if (irq_in >= (irqrouter->input_count + irqrouter->swirq_count))
+ return -EINVAL;
+ else if (irq_in >= irqrouter->input_count)
+ tango_set_swirq_route(irqrouter,
+ irq_in - irqrouter->input_count,
+ irq_out);
+ else
+ tango_set_hwirq_route(irqrouter,
+ irq_in,
+ irq_out);
+ return 0;
+}
+
+
+static int tango_set_irq_type(struct tango_irqrouter *irqrouter,
+ int hwirq_in,
+ u32 type,
+ u32 parent_type)
+{
+ int err;
+
+ if (parent_type & (type & IRQ_TYPE_SENSE_MASK))
+ /* same polarity */
+ err = tango_set_irq_inversion(irqrouter, hwirq_in, 0);
+ else
+ /* invert polarity */
+ err = tango_set_irq_inversion(irqrouter, hwirq_in, 1);
+
+ if (err < 0) {
+ DBGWARN("Failed to setup IRQ %d polarity\n", hwirq_in);
+ return err;
+ }
+
+ switch (type & IRQ_TYPE_SENSE_MASK) {
+ case IRQ_TYPE_EDGE_RISING:
+ case IRQ_TYPE_EDGE_FALLING:
+ DBGERR("Does not support edge triggers\n");
+ break;
+ case IRQ_TYPE_LEVEL_HIGH:
+ break;
+ case IRQ_TYPE_LEVEL_LOW:
+ break;
+ default:
+ DBGWARN("Invalid trigger mode 0x%x for hwirq(in) %d\n",
+ type, hwirq_in);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+
+static int tango_get_output_for_hwirq(struct tango_irqrouter *irqrouter,
+ int hwirq_in,
+ struct tango_irqrouter_output **out_val)
+{
+ struct tango_irqrouter_output *irqrouter_output;
+ int i;
+
+ if (!out_val)
+ return -EINVAL;
+
+ /* Get the irqrouter_output for the hwirq */
+ for (i = 0; i < irqrouter->output_count; i++) {
+ int j;
+
+ irqrouter_output = &(irqrouter->output[i]);
+
+ for (j = 0; j < irqrouter_output->shared_count; j++) {
+ if (hwirq_in == irqrouter_output->shared_irqs[j])
+ goto found_router_output;
+ }
+ }
+ if (i == irqrouter->output_count) {
+ DBGWARN("Couldn't find hwirq mapping\n");
+ return -ENODEV;
+ }
+
+found_router_output:
+
+ *out_val = irqrouter_output;
+ return 0;
+}
+
+static inline int tango_parse_fwspec(struct irq_domain *domain,
+ struct irq_fwspec *fwspec,
+ u32 *domain_id_out,
+ irq_hw_number_t *irq_out,
+ u32 *type_out)
+{
+#if 0
+ for (i = 0; i < fwspec->param_count; i++)
+ DBGLOG("[%d] 0x%x\n", i, fwspec->param[i]);
+#endif
+
+ if (!is_of_node(fwspec->fwnode)) {
+ DBGWARN("%s:%s(0x%p): Parameter mismatch\n",
+ NODE_NAME(irq_domain_get_of_node(domain)),
+ domain->name,
+ domain);
+ return -EINVAL;
+ }
+
+ if (fwspec->fwnode != domain->fwnode) {
+ DBGLOG("Unknown domain/node\n");
+ return -EINVAL;
+ }
+
+ if (fwspec->param_count != 3) {
+ DBGWARN("We need 3 params\n");
+ return -EINVAL;
+ }
+
+ if (domain_id_out)
+ *domain_id_out = fwspec->param[0];
+ if (irq_out)
+ *irq_out = fwspec->param[1];
+ if (type_out)
+ *type_out = fwspec->param[2];
+
+ return 0;
+}
+
+
+/* 'irqchip' handling callbacks
+ * Used for 'shared' IRQs, i.e.: IRQs that share a GIC input
+ * This driver performs the IRQ dispatch based on the flags
+ */
+
+
+static void tango_irqchip_mask_irq(struct irq_data *data)
+{
+ struct irq_domain *domain = irq_data_get_irq_chip_data(data);
+ struct tango_irqrouter_output *irqrouter_output = domain->host_data;
+ struct tango_irqrouter *irqrouter = irqrouter_output->context;
+ int hwirq_in = (int)data->hwirq;
+
+ tango_set_irq_enable(irqrouter, hwirq_in, 0);
+}
+
+
+static void tango_irqchip_unmask_irq(struct irq_data *data)
+{
+ struct irq_domain *domain = irq_data_get_irq_chip_data(data);
+ struct tango_irqrouter_output *irqrouter_output = domain->host_data;
+ struct tango_irqrouter *irqrouter = irqrouter_output->context;
+ int hwirq_in = (int)data->hwirq;
+
+ tango_set_irq_enable(irqrouter, hwirq_in, 1);
+}
+
+
+static int tango_irqchip_set_irq_type(struct irq_data *data,
+ unsigned int type)
+{
+ struct irq_domain *domain = irq_data_get_irq_chip_data(data);
+ struct tango_irqrouter_output *irqrouter_output = domain->host_data;
+ struct tango_irqrouter *irqrouter = irqrouter_output->context;
+ int hwirq_in = (int)data->hwirq;
+ u32 parent_type;
+
+ DBGLOG("%s:%s(0x%p) type 0x%x for hwirq(in) %d = virq %d "
+ "(routed to hwirq(out) %d)\n",
+ NODE_NAME(irq_domain_get_of_node(domain)),
+ domain->name,
+ domain,
+ type, hwirq_in, data->irq,
+ irqrouter_output->hwirq);
+
+ parent_type = (irqrouter_output->hwirq_level & IRQ_TYPE_SENSE_MASK);
+
+ return tango_set_irq_type(irqrouter, hwirq_in, type, parent_type);
+}
+
+
+#ifdef CONFIG_SMP
+static int tango_irqchip_set_irq_affinity(struct irq_data *data,
+ const struct cpumask *mask_val,
+ bool force)
+{
+ struct irq_domain *domain = irq_data_get_irq_chip_data(data);
+ struct tango_irqrouter_output *irqrouter_output = domain->host_data;
+ struct irq_chip *parent_chip = irq_get_chip(irqrouter_output->virq);
+ struct irq_data *parent_data = irq_get_irq_data(irqrouter_output->virq);
+
+ DBGLOG("%s:%s(0x%p)\n",
+ NODE_NAME(irq_domain_get_of_node(domain)), domain->name, domain);
+
+ if (parent_chip && parent_chip->irq_set_affinity)
+ return parent_chip->irq_set_affinity(parent_data,
+ mask_val,
+ force);
+ else
+ return -EINVAL;
+}
+#endif
+
+
+static inline u32 tango_dispatch_irqs(struct irq_domain *domain,
+ struct irq_desc *desc,
+ u32 status,
+ int base)
+{
+ u32 hwirq;
+ u32 virq;
+
+ while (status) {
+ hwirq = __ffs(status);
+ virq = irq_find_mapping(domain, base + hwirq);
+ if (unlikely(!virq))
+ handle_bad_irq(desc);
+ else
+ generic_handle_irq(virq);
+
+ status &= ~BIT(hwirq);
+ }
+
+ return status;
+}
+
+
+static void tango_irqdomain_handle_cascade_irq(struct irq_desc *desc)
+{
+ struct irq_domain *domain = irq_desc_get_handler_data(desc);
+ struct tango_irqrouter_output *irqrouter_output = domain->host_data;
+ struct tango_irqrouter *irqrouter = irqrouter_output->context;
+ struct irq_chip *host_chip = irq_desc_get_chip(desc);
+ u32 i, status;
+ u32 swirq_status, irq_status[BITMASK_VECTOR_SIZE(ROUTER_INPUTS)];
+
+#if 0
+ DBGLOG("%s:%s(0x%p): irqrouter_output 0x%p, hwirq(out) %d\n",
+ NODE_NAME(irq_domain_get_of_node(domain)), domain->name, domain,
+ irqrouter_output, irqrouter_output->hwirq);
+#endif
+
+ chained_irq_enter(host_chip, desc);
+
+ raw_spin_lock(&(irqrouter->lock));
+ swirq_status = tango_readl(irqrouter, READ_SWIRQ_STATUS);
+ for (i = 0; i < BITMASK_VECTOR_SIZE(ROUTER_INPUTS); i++)
+ irq_status[i] = tango_readl(irqrouter,
+ READ_SYS_IRQ_GROUP0 + i*4);
+ raw_spin_unlock(&(irqrouter->lock));
+
+ /* HW irqs */
+ for (i = 0; i < BITMASK_VECTOR_SIZE(ROUTER_INPUTS); i++) {
+#if 0
+ DBGLOG("%d: 0x%08x (en 0x%08x, inv 0x%08x)\n",
+ i,
+ irq_status[i],
+ irqrouter->irq_mask[0],
+ irqrouter->irq_invert_mask[0]);
+#endif
+
+#define HANDLE_INVERTED_LINES(__irqstatus__, __x__) ((((~__irqstatus__) & irqrouter->irq_invert_mask[__x__]) & irqrouter->irq_mask[__x__]) | __irqstatus__)
+#define HANDLE_EN_AND_INV_MASKS(__irqstatus__, __y__) (HANDLE_INVERTED_LINES(__irqstatus__, __y__) & irqrouter->irq_mask[__y__])
+
+ irq_status[i] = HANDLE_EN_AND_INV_MASKS(irq_status[i], i);
+ status = tango_dispatch_irqs(domain, desc, irq_status[i], i*32);
+ if (status & irq_status[i])
+ DBGERR("%s: %d unhandled IRQs (as a mask) 0x%x\n",
+ NODE_NAME(irq_domain_get_of_node(domain)),
+ i,
+ status & irq_status[i]);
+ }
+
+ /* SW irqs */
+ swirq_status &= irqrouter->swirq_mask;
+ status = tango_dispatch_irqs(domain, desc, swirq_status, 128);
+ if (status & swirq_status)
+ DBGERR("%s: Unhandled IRQs (as a mask) 0x%x\n",
+ NODE_NAME(irq_domain_get_of_node(domain)),
+ status & swirq_status);
+
+ chained_irq_exit(host_chip, desc);
+}
+
+
+/**
+ * tango_irqdomain_map - route a hwirq(in) to a hwirq(out).
+ * NOTE: The hwirq(out) must have been already allocated and enabled on
+ * the parent controller.
+ * @hwirq: HW IRQ of the device requesting an IRQ
+ * if hwirq > inputs it is a SW IRQ
+ * @virq: Linux IRQ (associated to the domain) to be given to the device
+ * @domain: IRQ domain (from the domain, we get the irqrouter_output
+ * in order to know to which output we need to route hwirq to)
+ */
+static int tango_irqdomain_map(struct irq_domain *domain,
+ unsigned int virq,
+ irq_hw_number_t hwirq)
+{
+ struct tango_irqrouter_output *irqrouter_output = domain->host_data;
+ struct tango_irqrouter *irqrouter = irqrouter_output->context;
+
+ DBGLOG("%s:%s(0x%p): hwirq(in) %d := virq %d, and route "
+ "hwirq(in) %d => hwirq(out) %d (virq %d)\n",
+ NODE_NAME(irq_domain_get_of_node(domain)),
+ domain->name,
+ domain,
+ (u32)hwirq,
+ virq,
+ (u32)hwirq,
+ irqrouter_output->hwirq,
+ irqrouter_output->virq);
+
+ if (hwirq >= (irqrouter->input_count + irqrouter->swirq_count))
+ DBGERR("%s: Invalid hwirq(in) %d >= %d + %d\n",
+ NODE_NAME(irq_domain_get_of_node(domain)),
+ (u32)hwirq,
+ irqrouter->input_count,
+ irqrouter->swirq_count);
+ else if (hwirq >= irqrouter->input_count)
+ DBGLOG("Map swirq %ld\n", hwirq - irqrouter->input_count);
+
+ irq_set_chip_and_handler(virq,
+ &tango_irq_chip_shared_ops,
+ handle_level_irq);
+ irq_set_chip_data(virq, domain);
+ irq_set_probe(virq);
+
+ tango_set_irq_route(irqrouter, hwirq, irqrouter_output->hwirq);
+
+ return 0;
+}
+
+
+/**
+ * tango_irqdomain_translate - used to select the domain for a given
+ * irq_fwspec
+ * @domain: a registered domain
+ * @fwspec: an IRQ specification. This callback is used to translate the
+ * parameters given as irq_fwspec into a HW IRQ and Type values.
+ * @out_hwirq:
+ * @out_type:
+ */
+static int tango_irqdomain_translate(struct irq_domain *domain,
+ struct irq_fwspec *fwspec,
+ unsigned long *out_hwirq,
+ unsigned int *out_type)
+{
+ struct tango_irqrouter_output *irqrouter_output = domain->host_data;
+ struct tango_irqrouter *irqrouter = irqrouter_output->context;
+ irq_hw_number_t irq;
+ u32 domain_id, type;
+ int err;
+
+ DBGLOG("%s:%s(0x%p): argc %d for hwirq(out) %d\n",
+ NODE_NAME(irq_domain_get_of_node(domain)),
+ domain->name,
+ domain,
+ fwspec->param_count,
+ irqrouter_output->hwirq);
+
+ err = tango_parse_fwspec(domain,
+ fwspec,
+ &domain_id,
+ &irq,
+ &type);
+ if (err < 0) {
+ DBGWARN("Failed to parse fwspec\n");
+ return err;
+ }
+
+ switch (domain_id) {
+ case SIGMA_HWIRQ:
+ DBGLOG("Request is for SIGMA_HWIRQ\n");
+ break;
+ case SIGMA_SWIRQ:
+ DBGLOG("Request is for SIGMA_SWIRQ\n");
+ irq += irqrouter->input_count;
+ break;
+ default:
+ DBGLOG("Request is for domain ID 0x%x (we are 0x%x)\n",
+ domain_id,
+ irqrouter_output->domain_id);
+ break;
+ };
+
+ *out_hwirq = irq;
+ *out_type = type & IRQ_TYPE_SENSE_MASK;
+
+ DBGLOG("hwirq %d type 0x%x\n", (u32)*out_hwirq, (u32)*out_type);
+
+ return 0;
+}
+
+
+/**
+ * tango_irqdomain_select - used to select the domain for a given irq_fwspec
+ * @domain: a registered domain
+ * @fwspec: an IRQ specification. This callback should return zero if the
+ * irq_fwspec does not belong to the given domain. If it does, it should
+ * return non-zero.
+ *
+ * In practice it will return non-zero if the irq_fwspec matches one of the
+ * IRQs shared within the given domain.
+ * @bus_token: a bus token
+ */
+static int tango_irqdomain_select(struct irq_domain *domain,
+ struct irq_fwspec *fwspec,
+ enum irq_domain_bus_token bus_token)
+{
+ struct tango_irqrouter_output *irqrouter_output = domain->host_data;
+ struct tango_irqrouter *irqrouter = irqrouter_output->context;
+ irq_hw_number_t irq;
+ u32 domain_id, type;
+ int err;
+
+ DBGLOG("%s:%s(0x%p): argc %d, 0x%p, bus 0x%x\n",
+ NODE_NAME(irq_domain_get_of_node(domain)), domain->name, domain,
+ fwspec->param_count, fwspec->fwnode, bus_token);
+
+ DBGLOG("router 0x%p, output 0x%p\n", irqrouter, irqrouter_output);
+
+ err = tango_parse_fwspec(domain, fwspec, &domain_id, &irq, &type);
+ if (err < 0)
+ return 0;
+
+ switch (domain_id) {
+ case SIGMA_HWIRQ:
+ DBGLOG("Request is for SIGMA_HWIRQ\n");
+ break;
+ case SIGMA_SWIRQ:
+ DBGLOG("Request is for SIGMA_SWIRQ\n");
+ break;
+ default:
+ DBGLOG("Request is for domain ID 0x%x (we are 0x%x)\n",
+ domain_id,
+ irqrouter_output->domain_id);
+ break;
+ };
+
+ if (!irqrouter->implicit_groups) {
+ int i;
+
+ /* Check if the requested IRQ belongs to those listed
+ * to be sharing the output assigned to this domain
+ */
+ if (irqrouter_output->shared_count <= 0) {
+ DBGLOG("Not shared IRQ line?\n");
+ return 0;
+ }
+
+ for (i = 0; i < irqrouter_output->shared_count; i++) {
+ if (irq == irqrouter_output->shared_irqs[i]) {
+ DBGLOG("Match: IRQ %lu\n", irq);
+ return 1;
+ }
+ }
+ } else {
+ /* Otherwise, check if the domain_id given matches
+ * the one assigned to this output
+ */
+ if (domain_id == irqrouter_output->domain_id) {
+ DBGLOG("Match: Domain ID %d\n", domain_id);
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+
+/* 'irqrouter' handling callbacks
+ * Used for 'direct' IRQs, i.e.: IRQs that are directly routed to the GIC
+ * This driver does not dispatch the IRQs, the GIC does.
+ */
+
+
+static void tango_irqrouter_mask_irq(struct irq_data *data)
+{
+ struct irq_domain *domain = irq_data_get_irq_chip_data(data);
+ struct tango_irqrouter *irqrouter = domain->host_data;
+ int hwirq_in = (int)data->hwirq;
+
+ DBGLOG("%s:%s(0x%p) hwirq(in) %d\n",
+ NODE_NAME(irq_domain_get_of_node(domain)),
+ domain->name,
+ domain,
+ hwirq_in);
+
+ tango_set_irq_enable(irqrouter, hwirq_in, 0);
+
+ irq_chip_mask_parent(data);
+}
+
+
+static void tango_irqrouter_unmask_irq(struct irq_data *data)
+{
+ struct irq_domain *domain = irq_data_get_irq_chip_data(data);
+ struct tango_irqrouter *irqrouter = domain->host_data;
+ int hwirq_in = (int)data->hwirq;
+
+ DBGLOG("%s:%s(0x%p) hwirq(in) %d\n",
+ NODE_NAME(irq_domain_get_of_node(domain)),
+ domain->name,
+ domain,
+ hwirq_in);
+
+ tango_set_irq_enable(irqrouter, hwirq_in, 1);
+
+ irq_chip_unmask_parent(data);
+}
+
+
+static int tango_irqrouter_set_irq_type(struct irq_data *data,
+ unsigned int type)
+{
+ struct irq_domain *domain = irq_data_get_irq_chip_data(data);
+ struct tango_irqrouter_output *irqrouter_output = NULL;
+ struct tango_irqrouter *irqrouter = domain->host_data;
+ int hwirq_in = (int)data->hwirq;
+ u32 parent_type;
+
+ DBGLOG("%s:%s(0x%p) type 0x%x for hwirq(in) %d\n",
+ NODE_NAME(irq_domain_get_of_node(domain)),
+ domain->name,
+ domain,
+ type,
+ hwirq_in);
+
+ tango_get_output_for_hwirq(irqrouter, hwirq_in, &irqrouter_output);
+ if (!irqrouter_output)
+ goto handle_parent;
+
+ parent_type = (irqrouter_output->hwirq_level & IRQ_TYPE_SENSE_MASK);
+ tango_set_irq_type(irqrouter, hwirq_in, type, parent_type);
+
+handle_parent:
+ return irq_chip_set_type_parent(data, type);
+}
+
+
+/**
+ * tango_irqdomain_hierarchy_alloc - map/reserve a router<->GIC connection
+ * @domain: IRQ domain.
+ * @virq: Linux IRQ (associated to the domain) to be given to the device.
+ * @nr_irqs: number of IRQs to reserve. MUST BE 1.
+ * @data: (of type 'struct irq_fwspec *') the HW IRQ requested:
+ * if in [0, input_count)
+ * => HW IRQ.
+ * if in [input_count, input_count+swirq_count)
+ * => SW IRQ.
+ * if in [input_count+swirq_count, input_count+swirq_count+irqgroup_count)
+ * => Fake HW IRQ.
+ */
+static int tango_irqdomain_hierarchy_alloc(struct irq_domain *domain,
+ unsigned int virq,
+ unsigned int nr_irqs,
+ void *data)
+{
+ struct tango_irqrouter *irqrouter = domain->host_data;
+ struct irq_fwspec *fwspec = data;
+ struct irq_fwspec fwspec_out;
+ irq_hw_number_t hwirq_in, hwirq_out;
+ u32 hwirq_type_in, hwirq_type_out;
+ u32 domain_id_in;
+ int i, err;
+
+ DBGLOG("%s:%s(0x%p), parent %s:%s(0x%p): virq %d nr_irqs %d, argc %d\n",
+ NODE_NAME(irq_domain_get_of_node(domain)), domain->name, domain,
+ NODE_NAME(irq_domain_get_of_node(domain->parent)),
+ domain->parent->name, domain->parent,
+ virq, nr_irqs, fwspec->param_count);
+
+ if (!irq_domain_get_of_node(domain->parent)) {
+ DBGWARN("Invalid params\n");
+ return -EINVAL;
+ }
+
+ if (nr_irqs != 1) {
+ DBGWARN("IRQ ranges not handled\n");
+ return -EINVAL;
+ }
+
+ /* Requested hwirq */
+ err = tango_parse_fwspec(domain,
+ fwspec,
+ &domain_id_in,
+ &hwirq_in,
+ &hwirq_type_in);
+ if (err < 0) {
+ DBGWARN("Failed to parse fwspec\n");
+ return err;
+ }
+
+ /* Only handle HW IRQ requests.
+ * SW IRQs are all shared and belong to another domain.
+ */
+ switch (domain_id_in) {
+ case SIGMA_HWIRQ:
+ DBGLOG("Request is for SIGMA_HWIRQ\n");
+ break;
+ case SIGMA_SWIRQ:
+ DBGLOG("Request is for SIGMA_SWIRQ\n");
+ default:
+ DBGWARN("Unhandled domain ID 0x%x\n", domain_id_in);
+ return -EINVAL;
+ };
+
+ /* Find a route */
+ raw_spin_lock(&(irqrouter->lock));
+ for (i = irqrouter->output_count - 1; i >= 0; i--) {
+ if (irqrouter->output[i].context == NULL)
+ break;
+ }
+ raw_spin_unlock(&(irqrouter->lock));
+
+ if (i < 0) {
+ DBGWARN("No more IRQ output lines free\n");
+ return -ENODEV;
+ }
+
+ /* Request our parent controller (the GIC) an IRQ line for the
+ * chosen route
+ */
+ hwirq_out = i;
+ hwirq_type_out = IRQ_TYPE_LEVEL_HIGH;
+
+ fwspec_out.fwnode = domain->parent->fwnode; /* should be the GIC */
+ fwspec_out.param_count = 3;
+ fwspec_out.param[0] = GIC_SPI;
+ fwspec_out.param[1] = hwirq_out;
+ fwspec_out.param[2] = hwirq_type_out;
+
+ err = irq_domain_alloc_irqs_parent(domain, virq, 1, &fwspec_out);
+ if (err) {
+ DBGWARN("Failed to allocate irq on parent\n");
+ return err;
+ }
+
+ /* Setup the route's output context */
+ irqrouter->output[hwirq_out].context = irqrouter;
+ irqrouter->output[hwirq_out].hwirq = hwirq_out;
+ irqrouter->output[hwirq_out].hwirq_level = hwirq_type_out;
+ irqrouter->output[hwirq_out].virq = virq;
+
+ if (hwirq_in >= irqrouter->input_count + irqrouter->swirq_count) {
+ DBGLOG("Fake hwirq(in) %d for shared IRQ line hwirq(out) %d\n",
+ (int)hwirq_in, (int)hwirq_out);
+
+ /* It is shared but we don't know yet how many IRQ
+ * lines share this output
+ */
+ irqrouter->output[hwirq_out].shared_count = -1;
+ } else {
+ DBGLOG("hwirq(in) %d = virq %d routed to hwirq(out) %d\n",
+ (int)hwirq_in, virq, (int)hwirq_out);
+
+ tango_set_irq_route(irqrouter, hwirq_in, hwirq_out);
+ /* Not shared */
+ irqrouter->output[hwirq_out].shared_count = 0;
+ }
+
+ /* Setup the handler ops for this IRQ line (virq)
+ * Since the IRQ line is allocated and handled by the GIC,
+ * most ops are generic, although we do need to intercept
+ * a few of them.
+ */
+ irq_domain_set_hwirq_and_chip(domain,
+ virq,
+ hwirq_in,
+ &tango_irq_chip_direct_ops,
+ domain);
+
+ return 0;
+}
+
+
+/**
+ * tango_irqdomain_hierarchy_free - map/reserve a router<->GIC connection
+ * @domain: domain of irq to unmap
+ * @virq: virq number
+ * @nr_irqs: number of irqs to free. MUST BE 1.
+ */
+static void tango_irqdomain_hierarchy_free(struct irq_domain *domain,
+ unsigned int virq,
+ unsigned int nr_irqs)
+{
+ struct tango_irqrouter *irqrouter = domain->host_data;
+ struct irq_data *irqdata;
+
+ DBGLOG("%s:%s(0x%p): virq %d nr_irqs %d\n",
+ NODE_NAME(irq_domain_get_of_node(domain)), domain->name, domain,
+ virq, nr_irqs);
+
+ if (nr_irqs != 1) {
+ DBGERR("IRQ ranges not handled\n");
+ return;
+ }
+
+ raw_spin_lock(&(irqrouter->lock));
+
+ irqdata = irq_domain_get_irq_data(domain, virq);
+ if (irqdata) {
+ DBGLOG("Freeing virq %d: was routed to hwirq(out) %d\n",
+ (int)virq,
+ (int)irqdata->hwirq);
+
+ tango_set_irq_route(irqrouter, 0x0, irqdata->hwirq);
+ irqrouter->output[irqdata->hwirq].context = NULL;
+ irq_domain_reset_irq_data(irqdata);
+ } else
+ DBGERR("Failed to get irq_data for virq %d\n", virq);
+
+ raw_spin_unlock(&(irqrouter->lock));
+}
+
+
+/**
+ * tango_irqdomain_hierarchy_translate - used to select the domain for a given
+ * irq_fwspec
+ * @domain: a registered domain
+ * @fwspec: an IRQ specification. This callback is used to translate the
+ * parameters given as irq_fwspec into a HW IRQ and Type values.
+ * @out_hwirq:
+ * @out_type:
+ */
+static int tango_irqdomain_hierarchy_translate(struct irq_domain *domain,
+ struct irq_fwspec *fwspec,
+ unsigned long *out_hwirq,
+ unsigned int *out_type)
+{
+ irq_hw_number_t irq;
+ u32 domain_id, type;
+ int err;
+
+ DBGLOG("%s:%s(0x%p): argc %d\n",
+ NODE_NAME(irq_domain_get_of_node(domain)),
+ domain->name,
+ domain,
+ fwspec->param_count);
+
+ err = tango_parse_fwspec(domain,
+ fwspec,
+ &domain_id,
+ &irq,
+ &type);
+ if (err < 0)
+ return err;
+
+ switch (domain_id) {
+ case SIGMA_HWIRQ:
+ DBGLOG("Request is for SIGMA_HWIRQ\n");
+ break;
+ case SIGMA_SWIRQ:
+ DBGLOG("Request is for SIGMA_SWIRQ\n");
+ default:
+ DBGWARN("Request is for domain ID 0x%x\n",
+ domain_id);
+ break;
+ };
+
+ *out_hwirq = irq;
+ *out_type = type & IRQ_TYPE_SENSE_MASK;
+
+ DBGLOG("hwirq %d type 0x%x\n", (u32)*out_hwirq, (u32)*out_type);
+
+ return 0;
+}
+
+
+/**
+ * tango_irqdomain_hierarchy_select - used to select the domain for a given
+ * irq_fwspec
+ * @domain: a registered domain
+ * @fwspec: an IRQ specification. This callback should return zero if the
+ * irq_fwspec does not belong to the given domain. If it does, it should
+ * return non-zero.
+ * @bus_token: a bus token
+ */
+static int tango_irqdomain_hierarchy_select(struct irq_domain *domain,
+ struct irq_fwspec *fwspec,
+ enum irq_domain_bus_token bus_token)
+{
+ struct tango_irqrouter *irqrouter = domain->host_data;
+ irq_hw_number_t irq;
+ u32 domain_id, type;
+ int err;
+
+ DBGLOG("%s:%s(0x%p): argc %d, 0x%p, bus 0x%x\n",
+ NODE_NAME(irq_domain_get_of_node(domain)), domain->name, domain,
+ fwspec->param_count, fwspec->fwnode, bus_token);
+
+ DBGLOG("router 0x%p\n", irqrouter);
+
+ err = tango_parse_fwspec(domain,
+ fwspec,
+ &domain_id,
+ &irq,
+ &type);
+ if (err < 0)
+ return 0;
+
+ /* Only handle HW IRQ requests.
+ * SW IRQs are all shared and belong to another domain.
+ */
+ switch (domain_id) {
+ case SIGMA_HWIRQ:
+ DBGLOG("Request is for SIGMA_HWIRQ\n");
+ break;
+ case SIGMA_SWIRQ:
+ DBGLOG("Request is for SIGMA_SWIRQ\n");
+ default:
+ DBGWARN("Unhandled domain ID 0x%x\n", domain_id);
+ return 0;
+ };
+
+ if (memcmp(fwspec->fwnode,
+ &(irqrouter->node->fwnode),
+ sizeof(struct fwnode_handle)) == 0) {
+ DBGLOG("Match: fwnode\n");
+ return 1;
+ }
+
+ return 0;
+}
+
+
+static int __init tango_irq_init_domain(struct tango_irqrouter *irqrouter,
+ u32 index,
+ u32 domain_id,
+ struct device_node *parent,
+ struct device_node *node)
+{
+ struct irq_domain *domain;
+ struct irq_fwspec fwspec_irq;
+ u32 virq, hwirq, hwirq_type, i;
+ u32 total_irqs;
+ u32 entry_size;
+ const __be32 *irqgroup;
+
+ if (index >= irqrouter->irqgroup_count) {
+ DBGWARN("%s: Group count mismatch\n", node->name);
+ return -EINVAL;
+ }
+
+ if (!parent) {
+ DBGWARN("%s: Invalid parent\n", node->name);
+ return -EINVAL;
+ }
+
+ /* The number of IRQs could be dependent on the domain_id but
+ * would require more code and could make it difficult to handle
+ * implicit and explicit domains
+ */
+ total_irqs = irqrouter->input_count + irqrouter->swirq_count;
+
+ switch (domain_id) {
+ case SIGMA_HWIRQ:
+ case SIGMA_SWIRQ:
+ break;
+ default:
+ if (!irqrouter->implicit_groups) {
+ DBGWARN("%s: Unhandled domain ID 0x%x\n",
+ node->name,
+ domain_id);
+ return -EINVAL;
+ }
+
+ DBGLOG("%s: Domain ID 0x%x\n", node->name, domain_id);
+ break;
+ };
+
+ /* To request a virq we need a HW IRQ, use a "Fake HW IRQ" */
+ hwirq = index + irqrouter->input_count + irqrouter->swirq_count;
+ hwirq_type = IRQ_TYPE_LEVEL_HIGH;
+
+ fwspec_irq.fwnode = &(parent->fwnode);
+ fwspec_irq.param_count = 3;
+ fwspec_irq.param[0] = SIGMA_HWIRQ;
+ fwspec_irq.param[1] = hwirq;
+ fwspec_irq.param[2] = hwirq_type;
+
+ /* Request a virq for the hwirq */
+ virq = irq_create_fwspec_mapping(&fwspec_irq);
+ if (virq <= 0) {
+ DBGWARN("%s: failed to get virq for hwirq(out) %d",
+ node->name, hwirq);
+ return -ENODEV;
+ }
+
+ /* Get the irqrouter_output for the virq */
+ for (i = 0; i < irqrouter->output_count; i++) {
+ if (virq == irqrouter->output[i].virq)
+ break;
+ }
+ if (i == irqrouter->output_count) {
+ DBGWARN("%s: Couldn't find virq<=>hwirq(out) mapping\n",
+ node->name);
+ return -ENODEV;
+ }
+
+ index = i;
+
+ irqrouter->output[index].domain_id = domain_id;
+
+ /* Create a domain for this virq */
+ domain = irq_domain_add_linear(parent,
+ total_irqs,
+ &tango_irqdomain_ops,
+ &(irqrouter->output[index]));
+ if (!domain) {
+ DBGERR("%s: Failed to create irqdomain", node->name);
+ return -EINVAL;
+ }
+
+ domain->name = kasprintf(GFP_KERNEL,
+ "irqdomain%d@...rq_out=%d",
+ index,
+ irqrouter->output[index].hwirq);
+
+ DBGLOG("%s:%s(0x%p) [%d], id 0x%x, %d irqs, irqrouter_output 0x%p : "
+ "hwirq(out) %d = virq %d\n",
+ NODE_NAME(irq_domain_get_of_node(domain)),
+ domain->name,
+ domain,
+ index,
+ domain_id,
+ total_irqs,
+ &(irqrouter->output[index]),
+ irqrouter->output[index].hwirq,
+ virq);
+
+ /* Populate list of shared IRQs */
+
+ if (domain_id == SIGMA_SWIRQ) {
+ irqrouter->output[index].shared_irqs = kcalloc(total_irqs,
+ sizeof(int),
+ GFP_KERNEL);
+ if (!irqrouter->output[index].shared_irqs) {
+ DBGERR("%s: Failed to allocate memory for group\n",
+ node->name);
+ return -ENOMEM;
+ }
+ irqrouter->output[index].shared_count = total_irqs;
+
+ for (i = 0; i < total_irqs; i++)
+ irqrouter->output[index].shared_irqs[i] = i;
+ }
+
+ irqgroup = of_get_property(node, "shared-irqs", &entry_size);
+ if (irqgroup) {
+ int entry;
+
+ entry_size /= sizeof(__be32);
+
+ irqrouter->output[index].shared_irqs = kcalloc(entry_size,
+ sizeof(int),
+ GFP_KERNEL);
+ if (!irqrouter->output[index].shared_irqs) {
+ DBGERR("%s: Failed to allocate memory for group\n",
+ node->name);
+ return -ENOMEM;
+ }
+
+ irqrouter->output[index].shared_count = entry_size;
+
+ for (i = 0; i < entry_size; i++) {
+ of_property_read_u32_index(node,
+ "shared-irqs",
+ i,
+ &entry);
+
+ irqrouter->output[index].shared_irqs[i] = entry;
+
+ DBGLOG("%s:%s(0x%p) irq %d sharing hwirq(out) %d\n",
+ NODE_NAME(irq_domain_get_of_node(domain)),
+ domain->name,
+ domain,
+ entry,
+ irqrouter->output[index].hwirq);
+ }
+ }
+
+
+ /* Associate the domain with the virq */
+ irq_set_chained_handler_and_data(virq,
+ tango_irqdomain_handle_cascade_irq,
+ domain);
+
+ return 0;
+}
+
+
+static int __init tango_of_irq_init(struct device_node *node,
+ struct device_node *parent)
+{
+ struct irq_domain *parent_domain, *domain;
+ struct tango_irqrouter *irqrouter;
+ struct device_node *child;
+ void __iomem *base;
+ u32 i, total_irqs;
+ int input_count, swirq_count, output_count;
+ int irqgroup_count;
+ int implicit_groups = 0;
+
+ if (!parent) {
+ DBGERR("%s: Missing parent\n", node->full_name);
+ return -ENODEV;
+ }
+
+ parent_domain = irq_find_host(parent);
+ if (!parent_domain) {
+ DBGERR("%s: Cannot get parent domain\n", node->full_name);
+ return -ENXIO;
+ }
+
+ base = of_iomap(node, 0);
+ if (!base) {
+ DBGERR("%s: Failed to map registers\n", node->name);
+ return -ENXIO;
+ }
+
+ if (of_property_read_u32(node, "inputs", &input_count)) {
+ DBGWARN("%s: Missing 'inputs' property\n", node->name);
+ return -EINVAL;
+ }
+
+ if (of_property_read_u32(node, "swirq-count", &swirq_count)) {
+ DBGWARN("%s: Missing 'swirq-count' property\n", node->name);
+ return -EINVAL;
+ }
+
+ if (of_property_read_u32(node, "outputs", &output_count)) {
+ DBGWARN("%s: Missing 'outputs' property\n", node->name);
+ return -EINVAL;
+ }
+
+ if ((input_count != ROUTER_INPUTS)
+ || (swirq_count != SWIRQ_COUNT)
+ || (output_count != ROUTER_OUTPUTS)) {
+ DBGERR("%s: input/swirq/output count mismatch\n", node->name);
+ return -EINVAL;
+ }
+
+ /* Check IRQ group mode */
+ if (of_property_read_u32(node, "irq-groups", &irqgroup_count)) {
+ DBGLOG("%s: Using explicit IRQ group definition\n", node->name);
+
+ /* count IRQ groups */
+ irqgroup_count = 0;
+ for_each_child_of_node(node, child)
+ irqgroup_count++;
+
+ implicit_groups = 0;
+ } else {
+ DBGLOG("%s: Using implicit IRQ group definition\n", node->name);
+ implicit_groups = irqgroup_count;
+ }
+
+ /* SW IRQs are always grouped together */
+ if (swirq_count)
+ irqgroup_count++;
+
+ if (irqgroup_count > output_count) {
+ DBGERR("%s: Too many IRQ groups %d > %d outputs\n",
+ node->name, irqgroup_count, output_count);
+ return -EINVAL;
+ }
+
+ /* Create the context */
+ irqrouter = kzalloc(sizeof(*irqrouter), GFP_KERNEL);
+ raw_spin_lock_init(&(irqrouter->lock));
+ irqrouter->node = node;
+ irqrouter->base = base;
+ irqrouter->input_count = input_count;
+ irqrouter->swirq_count = swirq_count;
+ irqrouter->irqgroup_count = irqgroup_count;
+ irqrouter->output_count = output_count;
+ irqrouter->implicit_groups = implicit_groups;
+
+ /* We probably don't need to add up swirq_count since SW irqs
+ * have are always muxed together
+ */
+ total_irqs = input_count + swirq_count + irqgroup_count;
+
+ domain = irq_domain_add_hierarchy(parent_domain,
+ 0,
+ total_irqs,
+ node,
+ &tango_irqdomain_hierarchy_ops,
+ irqrouter);
+ if (!domain) {
+ DBGERR("%s: Failed to allocate domain hierarchy\n", node->name);
+ iounmap(irqrouter->base);
+ kfree(irqrouter);
+ return -ENOMEM;
+ }
+
+ domain->name = node->full_name;
+
+ DBGWARN("%s:%s(0x%p) base 0x%p, %d (+ %d swirq) and %d %s IRQ groups "
+ "=> %d router 0x%p, parent %s\n",
+ NODE_NAME(irq_domain_get_of_node(domain)),
+ domain->name,
+ domain,
+ base,
+ input_count, swirq_count, irqgroup_count,
+ implicit_groups ? "implicit" : "explicit",
+ output_count,
+ irqrouter,
+ parent->full_name);
+
+ /* Allocate domains for shared IRQs */
+
+ if (irqrouter->swirq_count) {
+ int err;
+
+ /* All SW IRQs are muxed together */
+ err = tango_irq_init_domain(irqrouter,
+ 0,
+ SIGMA_SWIRQ,
+ node,
+ node);
+ if (err < 0) {
+ DBGERR("%s: Failed to init SWIRQ domain\n",
+ node->name);
+ }
+ }
+
+ if (irqrouter->implicit_groups > 0) {
+ int err;
+
+ /* NOTE that i starts at 1 because index 0 is reserved
+ * for SW IRQs.
+ */
+ i = 1;
+ for (; i < irqrouter->implicit_groups; i++) {
+ err = tango_irq_init_domain(irqrouter,
+ i,
+ SIGMA_IRQGROUP_KEY + i,
+ node,
+ node);
+ if (err < 0) {
+ DBGERR("%s: Failed to init domain %d\n",
+ node->name, i);
+ }
+ }
+ } else {
+ int err;
+
+ /* NOTE that i starts at 1 because index 0 is reserved
+ * for SW IRQs.
+ */
+ i = 1;
+ for_each_child_of_node(node, child) {
+ err = tango_irq_init_domain(irqrouter,
+ i,
+ SIGMA_HWIRQ,
+ node,
+ child);
+ if (err < 0) {
+ DBGERR("%s: Failed to init domain %d\n",
+ node->name, i);
+ }
+
+ i++;
+ }
+ }
+
+ /* HW IRQs: clear routing and disable them */
+ for (i = 0; i < irqrouter->input_count; i++)
+ tango_set_irq_route(irqrouter,
+ i,
+ -1);
+
+ /* SW IRQs: clear routing and disable them */
+ for (i = 0; i < irqrouter->swirq_count; i++)
+ tango_set_irq_route(irqrouter,
+ irqrouter->input_count + i,
+ -1);
+
+ return 0;
+}
+
+
+IRQCHIP_DECLARE(tango_irqrouter, "sigma,smp,irqrouter", tango_of_irq_init);
diff --git a/include/dt-bindings/interrupt-controller/irq-tango_v4.h b/include/dt-bindings/interrupt-controller/irq-tango_v4.h
new file mode 100644
index 0000000..eb85d54
--- /dev/null
+++ b/include/dt-bindings/interrupt-controller/irq-tango_v4.h
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2014 Sebastian Frias <sf84@...oste.net>
+ *
+ * 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.
+ */
+
+#ifndef _DT_BINDINGS_INTERRUPT_CONTROLLER_SIGMA_SMP_TANGO_V4_H
+#define _DT_BINDINGS_INTERRUPT_CONTROLLER_SIGMA_SMP_TANGO_V4_H
+
+#define SIGMA_HWIRQ (0xAA)
+#define SIGMA_SWIRQ (0x55)
+
+#define SIGMA_MAX_IRQGROUPS (16)
+
+#define SIGMA_IRQGROUP_KEY (0x80)
+
+/* NOTE: SW IRQs have their own IRQ group reserved, that's why there are
+ * only (SIGMA_MAX_IRQGROUPS - 1)=15 groups listed below and available
+ */
+#define SIGMA_IRQGROUP_1 (SIGMA_IRQGROUP_KEY + 0x1)
+#define SIGMA_IRQGROUP_2 (SIGMA_IRQGROUP_KEY + 0x2)
+#define SIGMA_IRQGROUP_3 (SIGMA_IRQGROUP_KEY + 0x3)
+#define SIGMA_IRQGROUP_4 (SIGMA_IRQGROUP_KEY + 0x4)
+#define SIGMA_IRQGROUP_5 (SIGMA_IRQGROUP_KEY + 0x5)
+#define SIGMA_IRQGROUP_6 (SIGMA_IRQGROUP_KEY + 0x6)
+#define SIGMA_IRQGROUP_7 (SIGMA_IRQGROUP_KEY + 0x7)
+#define SIGMA_IRQGROUP_8 (SIGMA_IRQGROUP_KEY + 0x8)
+#define SIGMA_IRQGROUP_9 (SIGMA_IRQGROUP_KEY + 0x9)
+#define SIGMA_IRQGROUP_10 (SIGMA_IRQGROUP_KEY + 0xa)
+#define SIGMA_IRQGROUP_11 (SIGMA_IRQGROUP_KEY + 0xb)
+#define SIGMA_IRQGROUP_12 (SIGMA_IRQGROUP_KEY + 0xc)
+#define SIGMA_IRQGROUP_13 (SIGMA_IRQGROUP_KEY + 0xd)
+#define SIGMA_IRQGROUP_14 (SIGMA_IRQGROUP_KEY + 0xe)
+#define SIGMA_IRQGROUP_15 (SIGMA_IRQGROUP_KEY + 0xf)
+
+#endif
--
1.7.11.2
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