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Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Browse Source 
Pull irq updates from Thomas Gleixner:
 "Nothing spectacular from the irq department this time:
   - overhaul of the crossbar chip driver
   - overhaul of the spear shirq chip driver
   - support for the atmel-aic chip
   - code move from arch to drivers
   - the usual tiny fixlets
   - two reverts worth to mention which undo the too simple attempt of
     supporting wakeup interrupts on shared interrupt lines"

* 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (41 commits)
  Revert "irq: Warn when shared interrupts do not match on NO_SUSPEND"
  Revert "PM / sleep / irq: Do not suspend wakeup interrupts"
  irq: Warn when shared interrupts do not match on NO_SUSPEND
  irqchip: atmel-aic: Define irq fixups for atmel SoCs
  irqchip: atmel-aic: Implement RTC irq fixup
  irqchip: atmel-aic: Add irq fixup infrastructure
  irqchip: atmel-aic: Add atmel AIC/AIC5 drivers
  irqchip: atmel-aic: Move binding doc to interrupt-controller directory
  genirq: generic chip: Export irq_map_generic_chip function
  PM / sleep / irq: Do not suspend wakeup interrupts
  irqchip: or1k-pic: Migrate from arch/openrisc/
  irqchip: crossbar: Allow for quirky hardware with direct hardwiring of GIC
  documentation: dt: omap: crossbar: Add description for interrupt consumer
  irqchip: crossbar: Introduce centralized check for crossbar write
  irqchip: crossbar: Introduce ti, max-crossbar-sources to identify valid crossbar mapping
  irqchip: crossbar: Add kerneldoc for crossbar_domain_unmap callback
  irqchip: crossbar: Set cb pointer to null in case of error
  irqchip: crossbar: Change the goto naming
  irqchip: crossbar: Return proper error value
  irqchip: crossbar: Fix kerneldoc warning
  ...
This commit is contained in:
Linus Torvalds 2014-08-05 17:38:45 -07:00
commit 08d69a2571
21 changed files with 1482 additions and 404 deletions
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36
Documentation/devicetree/bindings/arm/omap/crossbar.txt
View File

@ -10,6 +10,7 @@ Required properties:
- compatible : Should be "ti,irq-crossbar"
- reg: Base address and the size of the crossbar registers.
- ti,max-irqs: Total number of irqs available at the interrupt controller.
- ti,max-crossbar-sources: Maximum number of crossbar sources that can be routed.
- ti,reg-size: Size of a individual register in bytes. Every individual
register is assumed to be of same size. Valid sizes are 1, 2, 4.
- ti,irqs-reserved: List of the reserved irq lines that are not muxed using
@ -17,11 +18,46 @@ Required properties:
so crossbar bar driver should not consider them as free
lines.
Optional properties:
- ti,irqs-skip: This is similar to "ti,irqs-reserved", but these are for
SOC-specific hard-wiring of those irqs which unexpectedly bypasses the
crossbar. These irqs have a crossbar register, but still cannot be used.
- ti,irqs-safe-map: integer which maps to a safe configuration to use
when the interrupt controller irq is unused (when not provided, default is 0)
Examples:
crossbar_mpu: @4a020000 {
compatible = "ti,irq-crossbar";
reg = <0x4a002a48 0x130>;
ti,max-irqs = <160>;
ti,max-crossbar-sources = <400>;
ti,reg-size = <2>;
ti,irqs-reserved = <0 1 2 3 5 6 131 132 139 140>;
ti,irqs-skip = <10 133 139 140>;
};
Consumer:
========
See Documentation/devicetree/bindings/interrupt-controller/interrupts.txt and
Documentation/devicetree/bindings/arm/gic.txt for further details.
An interrupt consumer on an SoC using crossbar will use:
interrupts = <GIC_SPI request_number interrupt_level>
When the request number is between 0 to that described by
"ti,max-crossbar-sources", it is assumed to be a crossbar mapping. If the
request_number is greater than "ti,max-crossbar-sources", then it is mapped as a
quirky hardware mapping direct to GIC.
Example:
device_x@0x4a023000 {
/* Crossbar 8 used */
interrupts = <GIC_SPI 8 IRQ_TYPE_LEVEL_HIGH>;
...
};
device_y@0x4a033000 {
/* Direct mapped GIC SPI 1 used */
interrupts = <GIC_SPI DIRECT_IRQ(1) IRQ_TYPE_LEVEL_HIGH>;
...
};

0
Documentation/devicetree/bindings/arm/atmel-aic.txt → Documentation/devicetree/bindings/interrupt-controller/atmel,aic.txt
View File

23
Documentation/devicetree/bindings/interrupt-controller/opencores,or1k-pic.txt Normal file
View File

@ -0,0 +1,23 @@
OpenRISC 1000 Programmable Interrupt Controller
Required properties:
- compatible : should be "opencores,or1k-pic-level" for variants with
level triggered interrupt lines, "opencores,or1k-pic-edge" for variants with
edge triggered interrupt lines or "opencores,or1200-pic" for machines
with the non-spec compliant or1200 type implementation.
"opencores,or1k-pic" is also provided as an alias to "opencores,or1200-pic",
but this is only for backwards compatibility.
- interrupt-controller : Identifies the node as an interrupt controller
- #interrupt-cells : Specifies the number of cells needed to encode an
interrupt source. The value shall be 1.
Example:
intc: interrupt-controller {
compatible = "opencores,or1k-pic-level";
interrupt-controller;
#interrupt-cells = <1>;
};

1
arch/openrisc/Kconfig
View File

@ -22,6 +22,7 @@ config OPENRISC
select GENERIC_STRNLEN_USER
select MODULES_USE_ELF_RELA
select HAVE_DEBUG_STACKOVERFLOW
select OR1K_PIC
config MMU
def_bool y

3
arch/openrisc/include/asm/irq.h
View File

@ -24,4 +24,7 @@
#define NO_IRQ (-1)
void handle_IRQ(unsigned int, struct pt_regs *);
extern void set_handle_irq(void (*handle_irq)(struct pt_regs *));
#endif /* __ASM_OPENRISC_IRQ_H__ */

152
arch/openrisc/kernel/irq.c
View File

@ -16,11 +16,10 @@
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/of.h>
#include <linux/ftrace.h>
#include <linux/irq.h>
#include <linux/irqchip.h>
#include <linux/export.h>
#include <linux/irqdomain.h>
#include <linux/irqflags.h>
/* read interrupt enabled status */
@ -37,150 +36,31 @@ void arch_local_irq_restore(unsigned long flags)
}
EXPORT_SYMBOL(arch_local_irq_restore);
/* OR1K PIC implementation */
/* We're a couple of cycles faster than the generic implementations with
* these 'fast' versions.
*/
static void or1k_pic_mask(struct irq_data *data)
{
mtspr(SPR_PICMR, mfspr(SPR_PICMR) & ~(1UL << data->hwirq));
}
static void or1k_pic_unmask(struct irq_data *data)
{
mtspr(SPR_PICMR, mfspr(SPR_PICMR) | (1UL << data->hwirq));
}
static void or1k_pic_ack(struct irq_data *data)
{
/* EDGE-triggered interrupts need to be ack'ed in order to clear
* the latch.
* LEVEL-triggered interrupts do not need to be ack'ed; however,
* ack'ing the interrupt has no ill-effect and is quicker than
* trying to figure out what type it is...
*/
/* The OpenRISC 1000 spec says to write a 1 to the bit to ack the
* interrupt, but the OR1200 does this backwards and requires a 0
* to be written...
*/
#ifdef CONFIG_OR1K_1200
/* There are two oddities with the OR1200 PIC implementation:
* i) LEVEL-triggered interrupts are latched and need to be cleared
* ii) the interrupt latch is cleared by writing a 0 to the bit,
* as opposed to a 1 as mandated by the spec
*/
mtspr(SPR_PICSR, mfspr(SPR_PICSR) & ~(1UL << data->hwirq));
#else
WARN(1, "Interrupt handling possibly broken\n");
mtspr(SPR_PICSR, (1UL << data->hwirq));
#endif
}
static void or1k_pic_mask_ack(struct irq_data *data)
{
/* Comments for pic_ack apply here, too */
#ifdef CONFIG_OR1K_1200
mtspr(SPR_PICMR, mfspr(SPR_PICMR) & ~(1UL << data->hwirq));
mtspr(SPR_PICSR, mfspr(SPR_PICSR) & ~(1UL << data->hwirq));
#else
WARN(1, "Interrupt handling possibly broken\n");
mtspr(SPR_PICMR, (1UL << data->hwirq));
mtspr(SPR_PICSR, (1UL << data->hwirq));
#endif
}
#if 0
static int or1k_pic_set_type(struct irq_data *data, unsigned int flow_type)
{
/* There's nothing to do in the PIC configuration when changing
* flow type. Level and edge-triggered interrupts are both
* supported, but it's PIC-implementation specific which type
* is handled. */
return irq_setup_alt_chip(data, flow_type);
}
#endif
static struct irq_chip or1k_dev = {
.name = "or1k-PIC",
.irq_unmask = or1k_pic_unmask,
.irq_mask = or1k_pic_mask,
.irq_ack = or1k_pic_ack,
.irq_mask_ack = or1k_pic_mask_ack,
};
static struct irq_domain *root_domain;
static inline int pic_get_irq(int first)
{
int hwirq;
hwirq = ffs(mfspr(SPR_PICSR) >> first);
if (!hwirq)
return NO_IRQ;
else
hwirq = hwirq + first -1;
return irq_find_mapping(root_domain, hwirq);
}
static int or1k_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hw)
{
irq_set_chip_and_handler_name(irq, &or1k_dev,
handle_level_irq, "level");
irq_set_status_flags(irq, IRQ_LEVEL | IRQ_NOPROBE);
return 0;
}
static const struct irq_domain_ops or1k_irq_domain_ops = {
.xlate = irq_domain_xlate_onecell,
.map = or1k_map,
};
/*
* This sets up the IRQ domain for the PIC built in to the OpenRISC
* 1000 CPU. This is the "root" domain as these are the interrupts
* that directly trigger an exception in the CPU.
*/
static void __init or1k_irq_init(void)
{
struct device_node *intc = NULL;
/* The interrupt controller device node is mandatory */
intc = of_find_compatible_node(NULL, NULL, "opencores,or1k-pic");
BUG_ON(!intc);
/* Disable all interrupts until explicitly requested */
mtspr(SPR_PICMR, (0UL));
root_domain = irq_domain_add_linear(intc, 32,
&or1k_irq_domain_ops, NULL);
}
void __init init_IRQ(void)
{
or1k_irq_init();
irqchip_init();
}
void __irq_entry do_IRQ(struct pt_regs *regs)
static void (*handle_arch_irq)(struct pt_regs *);
void __init set_handle_irq(void (*handle_irq)(struct pt_regs *))
{
handle_arch_irq = handle_irq;
}
void handle_IRQ(unsigned int irq, struct pt_regs *regs)
{
int irq = -1;
struct pt_regs *old_regs = set_irq_regs(regs);
irq_enter();
while ((irq = pic_get_irq(irq + 1)) != NO_IRQ)
generic_handle_irq(irq);
generic_handle_irq(irq);
irq_exit();
set_irq_regs(old_regs);
}
void __irq_entry do_IRQ(struct pt_regs *regs)
{
handle_arch_irq(regs);
}

18
drivers/irqchip/Kconfig
View File

@ -35,6 +35,20 @@ config ARM_VIC_NR
The maximum number of VICs available in the system, for
power management.
config ATMEL_AIC_IRQ
bool
select GENERIC_IRQ_CHIP
select IRQ_DOMAIN
select MULTI_IRQ_HANDLER
select SPARSE_IRQ
config ATMEL_AIC5_IRQ
bool
select GENERIC_IRQ_CHIP
select IRQ_DOMAIN
select MULTI_IRQ_HANDLER
select SPARSE_IRQ
config BRCMSTB_L2_IRQ
bool
depends on ARM
@ -58,6 +72,10 @@ config CLPS711X_IRQCHIP
select SPARSE_IRQ
default y
config OR1K_PIC
bool
select IRQ_DOMAIN
config ORION_IRQCHIP
bool
select IRQ_DOMAIN

3
drivers/irqchip/Makefile
View File

@ -11,6 +11,7 @@ obj-$(CONFIG_METAG) += irq-metag-ext.o
obj-$(CONFIG_METAG_PERFCOUNTER_IRQS) += irq-metag.o
obj-$(CONFIG_ARCH_MOXART) += irq-moxart.o
obj-$(CONFIG_CLPS711X_IRQCHIP) += irq-clps711x.o
obj-$(CONFIG_OR1K_PIC) += irq-or1k-pic.o
obj-$(CONFIG_ORION_IRQCHIP) += irq-orion.o
obj-$(CONFIG_ARCH_SUNXI) += irq-sun4i.o
obj-$(CONFIG_ARCH_SUNXI) += irq-sunxi-nmi.o
@ -19,6 +20,8 @@ obj-$(CONFIG_ARM_GIC) += irq-gic.o irq-gic-common.o
obj-$(CONFIG_ARM_GIC_V3) += irq-gic-v3.o irq-gic-common.o
obj-$(CONFIG_ARM_NVIC) += irq-nvic.o
obj-$(CONFIG_ARM_VIC) += irq-vic.o
obj-$(CONFIG_ATMEL_AIC_IRQ) += irq-atmel-aic-common.o irq-atmel-aic.o
obj-$(CONFIG_ATMEL_AIC5_IRQ) += irq-atmel-aic-common.o irq-atmel-aic5.o
obj-$(CONFIG_IMGPDC_IRQ) += irq-imgpdc.o
obj-$(CONFIG_SIRF_IRQ) += irq-sirfsoc.o
obj-$(CONFIG_RENESAS_INTC_IRQPIN) += irq-renesas-intc-irqpin.o

254
drivers/irqchip/irq-atmel-aic-common.c Normal file
View File

@ -0,0 +1,254 @@
/*
* Atmel AT91 common AIC (Advanced Interrupt Controller) code shared by
* irq-atmel-aic and irq-atmel-aic5 drivers
*
* Copyright (C) 2004 SAN People
* Copyright (C) 2004 ATMEL
* Copyright (C) Rick Bronson
* Copyright (C) 2014 Free Electrons
*
* Author: Boris BREZILLON <boris.brezillon@free-electrons.com>
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#include <linux/errno.h>
#include <linux/io.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/slab.h>
#include "irq-atmel-aic-common.h"
#define AT91_AIC_PRIOR GENMASK(2, 0)
#define AT91_AIC_IRQ_MIN_PRIORITY 0
#define AT91_AIC_IRQ_MAX_PRIORITY 7
#define AT91_AIC_SRCTYPE GENMASK(7, 6)
#define AT91_AIC_SRCTYPE_LOW (0 << 5)
#define AT91_AIC_SRCTYPE_FALLING (1 << 5)
#define AT91_AIC_SRCTYPE_HIGH (2 << 5)
#define AT91_AIC_SRCTYPE_RISING (3 << 5)
struct aic_chip_data {
u32 ext_irqs;
};
static void aic_common_shutdown(struct irq_data *d)
{
struct irq_chip_type *ct = irq_data_get_chip_type(d);
ct->chip.irq_mask(d);
}
int aic_common_set_type(struct irq_data *d, unsigned type, unsigned *val)
{
struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
struct aic_chip_data *aic = gc->private;
unsigned aic_type;
switch (type) {
case IRQ_TYPE_LEVEL_HIGH:
aic_type = AT91_AIC_SRCTYPE_HIGH;
break;
case IRQ_TYPE_EDGE_RISING:
aic_type = AT91_AIC_SRCTYPE_RISING;
break;
case IRQ_TYPE_LEVEL_LOW:
if (!(d->mask & aic->ext_irqs))
return -EINVAL;
aic_type = AT91_AIC_SRCTYPE_LOW;
break;
case IRQ_TYPE_EDGE_FALLING:
if (!(d->mask & aic->ext_irqs))
return -EINVAL;
aic_type = AT91_AIC_SRCTYPE_FALLING;
break;
default:
return -EINVAL;
}
*val &= AT91_AIC_SRCTYPE;
*val |= aic_type;
return 0;
}
int aic_common_set_priority(int priority, unsigned *val)
{
if (priority < AT91_AIC_IRQ_MIN_PRIORITY ||
priority > AT91_AIC_IRQ_MAX_PRIORITY)
return -EINVAL;
*val &= AT91_AIC_PRIOR;
*val |= priority;
return 0;
}
int aic_common_irq_domain_xlate(struct irq_domain *d,
struct device_node *ctrlr,
const u32 *intspec,
unsigned int intsize,
irq_hw_number_t *out_hwirq,
unsigned int *out_type)
{
if (WARN_ON(intsize < 3))
return -EINVAL;
if (WARN_ON((intspec[2] < AT91_AIC_IRQ_MIN_PRIORITY) ||
(intspec[2] > AT91_AIC_IRQ_MAX_PRIORITY)))
return -EINVAL;
*out_hwirq = intspec[0];
*out_type = intspec[1] & IRQ_TYPE_SENSE_MASK;
return 0;
}
static void __init aic_common_ext_irq_of_init(struct irq_domain *domain)
{
struct device_node *node = domain->of_node;
struct irq_chip_generic *gc;
struct aic_chip_data *aic;
struct property *prop;
const __be32 *p;
u32 hwirq;
gc = irq_get_domain_generic_chip(domain, 0);
aic = gc->private;
aic->ext_irqs |= 1;
of_property_for_each_u32(node, "atmel,external-irqs", prop, p, hwirq) {
gc = irq_get_domain_generic_chip(domain, hwirq);
if (!gc) {
pr_warn("AIC: external irq %d >= %d skip it\n",
hwirq, domain->revmap_size);
continue;
}
aic = gc->private;
aic->ext_irqs |= (1 << (hwirq % 32));
}
}
#define AT91_RTC_IDR 0x24
#define AT91_RTC_IMR 0x28
#define AT91_RTC_IRQ_MASK 0x1f
void __init aic_common_rtc_irq_fixup(struct device_node *root)
{
struct device_node *np;
void __iomem *regs;
np = of_find_compatible_node(root, NULL, "atmel,at91rm9200-rtc");
if (!np)
np = of_find_compatible_node(root, NULL,
"atmel,at91sam9x5-rtc");
if (!np)
return;
regs = of_iomap(np, 0);
of_node_put(np);
if (!regs)
return;
writel(AT91_RTC_IRQ_MASK, regs + AT91_RTC_IDR);
iounmap(regs);
}
void __init aic_common_irq_fixup(const struct of_device_id *matches)
{
struct device_node *root = of_find_node_by_path("/");
const struct of_device_id *match;
if (!root)
return;
match = of_match_node(matches, root);
of_node_put(root);
if (match) {
void (*fixup)(struct device_node *) = match->data;
fixup(root);
}
of_node_put(root);
}
struct irq_domain *__init aic_common_of_init(struct device_node *node,
const struct irq_domain_ops *ops,
const char *name, int nirqs)
{
struct irq_chip_generic *gc;
struct irq_domain *domain;
struct aic_chip_data *aic;
void __iomem *reg_base;
int nchips;
int ret;
int i;
nchips = DIV_ROUND_UP(nirqs, 32);
reg_base = of_iomap(node, 0);
if (!reg_base)
return ERR_PTR(-ENOMEM);
aic = kcalloc(nchips, sizeof(*aic), GFP_KERNEL);
if (!aic) {
ret = -ENOMEM;
goto err_iounmap;
}
domain = irq_domain_add_linear(node, nchips * 32, ops, aic);
if (!domain) {
ret = -ENOMEM;
goto err_free_aic;
}
ret = irq_alloc_domain_generic_chips(domain, 32, 1, name,
handle_level_irq, 0, 0,
IRQCHIP_SKIP_SET_WAKE);
if (ret)
goto err_domain_remove;
for (i = 0; i < nchips; i++) {
gc = irq_get_domain_generic_chip(domain, i * 32);
gc->reg_base = reg_base;
gc->unused = 0;
gc->wake_enabled = ~0;
gc->chip_types[0].type = IRQ_TYPE_SENSE_MASK;
gc->chip_types[0].handler = handle_fasteoi_irq;
gc->chip_types[0].chip.irq_eoi = irq_gc_eoi;
gc->chip_types[0].chip.irq_set_wake = irq_gc_set_wake;
gc->chip_types[0].chip.irq_shutdown = aic_common_shutdown;
gc->private = &aic[i];
}
aic_common_ext_irq_of_init(domain);
return domain;
err_domain_remove:
irq_domain_remove(domain);
err_free_aic:
kfree(aic);
err_iounmap:
iounmap(reg_base);
return ERR_PTR(ret);
}

39
drivers/irqchip/irq-atmel-aic-common.h Normal file
View File

@ -0,0 +1,39 @@
/*
* Atmel AT91 common AIC (Advanced Interrupt Controller) header file
*
* Copyright (C) 2004 SAN People
* Copyright (C) 2004 ATMEL
* Copyright (C) Rick Bronson
* Copyright (C) 2014 Free Electrons
*
* Author: Boris BREZILLON <boris.brezillon@free-electrons.com>
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#ifndef __IRQ_ATMEL_AIC_COMMON_H
#define __IRQ_ATMEL_AIC_COMMON_H
int aic_common_set_type(struct irq_data *d, unsigned type, unsigned *val);
int aic_common_set_priority(int priority, unsigned *val);
int aic_common_irq_domain_xlate(struct irq_domain *d,
struct device_node *ctrlr,
const u32 *intspec,
unsigned int intsize,
irq_hw_number_t *out_hwirq,
unsigned int *out_type);
struct irq_domain *__init aic_common_of_init(struct device_node *node,
const struct irq_domain_ops *ops,
const char *name, int nirqs);
void __init aic_common_rtc_irq_fixup(struct device_node *root);
void __init aic_common_irq_fixup(const struct of_device_id *matches);
#endif /* __IRQ_ATMEL_AIC_COMMON_H */

262
drivers/irqchip/irq-atmel-aic.c Normal file
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@ -0,0 +1,262 @@
/*
* Atmel AT91 AIC (Advanced Interrupt Controller) driver
*
* Copyright (C) 2004 SAN People
* Copyright (C) 2004 ATMEL
* Copyright (C) Rick Bronson
* Copyright (C) 2014 Free Electrons
*
* Author: Boris BREZILLON <boris.brezillon@free-electrons.com>
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/bitmap.h>
#include <linux/types.h>
#include <linux/irq.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/irqdomain.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/io.h>
#include <asm/exception.h>
#include <asm/mach/irq.h>
#include "irq-atmel-aic-common.h"
#include "irqchip.h"
/* Number of irq lines managed by AIC */
#define NR_AIC_IRQS 32
#define AT91_AIC_SMR(n) ((n) * 4)
#define AT91_AIC_SVR(n) (0x80 + ((n) * 4))
#define AT91_AIC_IVR 0x100
#define AT91_AIC_FVR 0x104
#define AT91_AIC_ISR 0x108
#define AT91_AIC_IPR 0x10c
#define AT91_AIC_IMR 0x110
#define AT91_AIC_CISR 0x114
#define AT91_AIC_IECR 0x120
#define AT91_AIC_IDCR 0x124
#define AT91_AIC_ICCR 0x128
#define AT91_AIC_ISCR 0x12c
#define AT91_AIC_EOICR 0x130
#define AT91_AIC_SPU 0x134
#define AT91_AIC_DCR 0x138
static struct irq_domain *aic_domain;
static asmlinkage void __exception_irq_entry
aic_handle(struct pt_regs *regs)
{
struct irq_domain_chip_generic *dgc = aic_domain->gc;
struct irq_chip_generic *gc = dgc->gc[0];
u32 irqnr;
u32 irqstat;
irqnr = irq_reg_readl(gc->reg_base + AT91_AIC_IVR);
irqstat = irq_reg_readl(gc->reg_base + AT91_AIC_ISR);
irqnr = irq_find_mapping(aic_domain, irqnr);
if (!irqstat)
irq_reg_writel(0, gc->reg_base + AT91_AIC_EOICR);
else
handle_IRQ(irqnr, regs);
}
static int aic_retrigger(struct irq_data *d)
{
struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
/* Enable interrupt on AIC5 */
irq_gc_lock(gc);
irq_reg_writel(d->mask, gc->reg_base + AT91_AIC_ISCR);
irq_gc_unlock(gc);
return 0;
}
static int aic_set_type(struct irq_data *d, unsigned type)
{
struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
unsigned int smr;
int ret;
smr = irq_reg_readl(gc->reg_base + AT91_AIC_SMR(d->hwirq));
ret = aic_common_set_type(d, type, &smr);
if (ret)
return ret;
irq_reg_writel(smr, gc->reg_base + AT91_AIC_SMR(d->hwirq));
return 0;
}
#ifdef CONFIG_PM
static void aic_suspend(struct irq_data *d)
{
struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
irq_gc_lock(gc);
irq_reg_writel(gc->mask_cache, gc->reg_base + AT91_AIC_IDCR);
irq_reg_writel(gc->wake_active, gc->reg_base + AT91_AIC_IECR);
irq_gc_unlock(gc);
}
static void aic_resume(struct irq_data *d)
{
struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
irq_gc_lock(gc);
irq_reg_writel(gc->wake_active, gc->reg_base + AT91_AIC_IDCR);
irq_reg_writel(gc->mask_cache, gc->reg_base + AT91_AIC_IECR);
irq_gc_unlock(gc);
}
static void aic_pm_shutdown(struct irq_data *d)
{
struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
irq_gc_lock(gc);
irq_reg_writel(0xffffffff, gc->reg_base + AT91_AIC_IDCR);
irq_reg_writel(0xffffffff, gc->reg_base + AT91_AIC_ICCR);
irq_gc_unlock(gc);
}
#else
#define aic_suspend NULL
#define aic_resume NULL
#define aic_pm_shutdown NULL
#endif /* CONFIG_PM */
static void __init aic_hw_init(struct irq_domain *domain)
{
struct irq_chip_generic *gc = irq_get_domain_generic_chip(domain, 0);
int i;
/*
* Perform 8 End Of Interrupt Command to make sure AIC
* will not Lock out nIRQ
*/
for (i = 0; i < 8; i++)
irq_reg_writel(0, gc->reg_base + AT91_AIC_EOICR);
/*
* Spurious Interrupt ID in Spurious Vector Register.
* When there is no current interrupt, the IRQ Vector Register
* reads the value stored in AIC_SPU
*/
irq_reg_writel(0xffffffff, gc->reg_base + AT91_AIC_SPU);
/* No debugging in AIC: Debug (Protect) Control Register */
irq_reg_writel(0, gc->reg_base + AT91_AIC_DCR);
/* Disable and clear all interrupts initially */
irq_reg_writel(0xffffffff, gc->reg_base + AT91_AIC_IDCR);
irq_reg_writel(0xffffffff, gc->reg_base + AT91_AIC_ICCR);
for (i = 0; i < 32; i++)
irq_reg_writel(i, gc->reg_base + AT91_AIC_SVR(i));
}
static int aic_irq_domain_xlate(struct irq_domain *d,
struct device_node *ctrlr,
const u32 *intspec, unsigned int intsize,
irq_hw_number_t *out_hwirq,
unsigned int *out_type)
{
struct irq_domain_chip_generic *dgc = d->gc;
struct irq_chip_generic *gc;
unsigned smr;
int idx;
int ret;
if (!dgc)
return -EINVAL;
ret = aic_common_irq_domain_xlate(d, ctrlr, intspec, intsize,
out_hwirq, out_type);
if (ret)
return ret;
idx = intspec[0] / dgc->irqs_per_chip;
if (idx >= dgc->num_chips)
return -EINVAL;
gc = dgc->gc[idx];
irq_gc_lock(gc);
smr = irq_reg_readl(gc->reg_base + AT91_AIC_SMR(*out_hwirq));
ret = aic_common_set_priority(intspec[2], &smr);
if (!ret)
irq_reg_writel(smr, gc->reg_base + AT91_AIC_SMR(*out_hwirq));
irq_gc_unlock(gc);
return ret;
}
static const struct irq_domain_ops aic_irq_ops = {
.map = irq_map_generic_chip,
.xlate = aic_irq_domain_xlate,
};
static void __init at91sam9_aic_irq_fixup(struct device_node *root)
{
aic_common_rtc_irq_fixup(root);
}
static const struct of_device_id __initdata aic_irq_fixups[] = {
{ .compatible = "atmel,at91sam9g45", .data = at91sam9_aic_irq_fixup },
{ .compatible = "atmel,at91sam9n12", .data = at91sam9_aic_irq_fixup },
{ .compatible = "atmel,at91sam9rl", .data = at91sam9_aic_irq_fixup },
{ .compatible = "atmel,at91sam9x5", .data = at91sam9_aic_irq_fixup },
{ /* sentinel */ },
};
static int __init aic_of_init(struct device_node *node,
struct device_node *parent)
{
struct irq_chip_generic *gc;
struct irq_domain *domain;
if (aic_domain)
return -EEXIST;
domain = aic_common_of_init(node, &aic_irq_ops, "atmel-aic",
NR_AIC_IRQS);
if (IS_ERR(domain))
return PTR_ERR(domain);
aic_common_irq_fixup(aic_irq_fixups);
aic_domain = domain;
gc = irq_get_domain_generic_chip(domain, 0);
gc->chip_types[0].regs.eoi = AT91_AIC_EOICR;
gc->chip_types[0].regs.enable = AT91_AIC_IECR;
gc->chip_types[0].regs.disable = AT91_AIC_IDCR;
gc->chip_types[0].chip.irq_mask = irq_gc_mask_disable_reg;
gc->chip_types[0].chip.irq_unmask = irq_gc_unmask_enable_reg;
gc->chip_types[0].chip.irq_retrigger = aic_retrigger;
gc->chip_types[0].chip.irq_set_type = aic_set_type;
gc->chip_types[0].chip.irq_suspend = aic_suspend;
gc->chip_types[0].chip.irq_resume = aic_resume;
gc->chip_types[0].chip.irq_pm_shutdown = aic_pm_shutdown;
aic_hw_init(domain);
set_handle_irq(aic_handle);
return 0;
}
IRQCHIP_DECLARE(at91rm9200_aic, "atmel,at91rm9200-aic", aic_of_init);

353
drivers/irqchip/irq-atmel-aic5.c Normal file
View File

@ -0,0 +1,353 @@
/*
* Atmel AT91 AIC5 (Advanced Interrupt Controller) driver
*
* Copyright (C) 2004 SAN People
* Copyright (C) 2004 ATMEL
* Copyright (C) Rick Bronson
* Copyright (C) 2014 Free Electrons
*
* Author: Boris BREZILLON <boris.brezillon@free-electrons.com>
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/bitmap.h>
#include <linux/types.h>
#include <linux/irq.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/irqdomain.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/io.h>
#include <asm/exception.h>
#include <asm/mach/irq.h>
#include "irq-atmel-aic-common.h"
#include "irqchip.h"
/* Number of irq lines managed by AIC */
#define NR_AIC5_IRQS 128
#define AT91_AIC5_SSR 0x0
#define AT91_AIC5_INTSEL_MSK (0x7f << 0)
#define AT91_AIC5_SMR 0x4
#define AT91_AIC5_SVR 0x8
#define AT91_AIC5_IVR 0x10
#define AT91_AIC5_FVR 0x14
#define AT91_AIC5_ISR 0x18
#define AT91_AIC5_IPR0 0x20
#define AT91_AIC5_IPR1 0x24
#define AT91_AIC5_IPR2 0x28
#define AT91_AIC5_IPR3 0x2c
#define AT91_AIC5_IMR 0x30
#define AT91_AIC5_CISR 0x34
#define AT91_AIC5_IECR 0x40
#define AT91_AIC5_IDCR 0x44
#define AT91_AIC5_ICCR 0x48
#define AT91_AIC5_ISCR 0x4c
#define AT91_AIC5_EOICR 0x38
#define AT91_AIC5_SPU 0x3c
#define AT91_AIC5_DCR 0x6c
#define AT91_AIC5_FFER 0x50
#define AT91_AIC5_FFDR 0x54
#define AT91_AIC5_FFSR 0x58
static struct irq_domain *aic5_domain;
static asmlinkage void __exception_irq_entry
aic5_handle(struct pt_regs *regs)
{
struct irq_domain_chip_generic *dgc = aic5_domain->gc;
struct irq_chip_generic *gc = dgc->gc[0];
u32 irqnr;
u32 irqstat;
irqnr = irq_reg_readl(gc->reg_base + AT91_AIC5_IVR);
irqstat = irq_reg_readl(gc->reg_base + AT91_AIC5_ISR);
irqnr = irq_find_mapping(aic5_domain, irqnr);
if (!irqstat)
irq_reg_writel(0, gc->reg_base + AT91_AIC5_EOICR);
else
handle_IRQ(irqnr, regs);
}
static void aic5_mask(struct irq_data *d)
{
struct irq_domain *domain = d->domain;
struct irq_domain_chip_generic *dgc = domain->gc;
struct irq_chip_generic *gc = dgc->gc[0];
/* Disable interrupt on AIC5 */
irq_gc_lock(gc);
irq_reg_writel(d->hwirq, gc->reg_base + AT91_AIC5_SSR);
irq_reg_writel(1, gc->reg_base + AT91_AIC5_IDCR);
gc->mask_cache &= ~d->mask;
irq_gc_unlock(gc);
}
static void aic5_unmask(struct irq_data *d)
{
struct irq_domain *domain = d->domain;
struct irq_domain_chip_generic *dgc = domain->gc;
struct irq_chip_generic *gc = dgc->gc[0];
/* Enable interrupt on AIC5 */
irq_gc_lock(gc);
irq_reg_writel(d->hwirq, gc->reg_base + AT91_AIC5_SSR);
irq_reg_writel(1, gc->reg_base + AT91_AIC5_IECR);
gc->mask_cache |= d->mask;
irq_gc_unlock(gc);
}
static int aic5_retrigger(struct irq_data *d)
{
struct irq_domain *domain = d->domain;
struct irq_domain_chip_generic *dgc = domain->gc;
struct irq_chip_generic *gc = dgc->gc[0];
/* Enable interrupt on AIC5 */
irq_gc_lock(gc);
irq_reg_writel(d->hwirq, gc->reg_base + AT91_AIC5_SSR);
irq_reg_writel(1, gc->reg_base + AT91_AIC5_ISCR);
irq_gc_unlock(gc);
return 0;
}
static int aic5_set_type(struct irq_data *d, unsigned type)
{
struct irq_domain *domain = d->domain;
struct irq_domain_chip_generic *dgc = domain->gc;
struct irq_chip_generic *gc = dgc->gc[0];
unsigned int smr;
int ret;
irq_gc_lock(gc);
irq_reg_writel(d->hwirq, gc->reg_base + AT91_AIC5_SSR);
smr = irq_reg_readl(gc->reg_base + AT91_AIC5_SMR);
ret = aic_common_set_type(d, type, &smr);
if (!ret)
irq_reg_writel(smr, gc->reg_base + AT91_AIC5_SMR);
irq_gc_unlock(gc);
return ret;
}
#ifdef CONFIG_PM
static void aic5_suspend(struct irq_data *d)
{
struct irq_domain *domain = d->domain;
struct irq_domain_chip_generic *dgc = domain->gc;
struct irq_chip_generic *bgc = dgc->gc[0];
struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
int i;
u32 mask;
irq_gc_lock(bgc);
for (i = 0; i < dgc->irqs_per_chip; i++) {
mask = 1 << i;
if ((mask & gc->mask_cache) == (mask & gc->wake_active))
continue;
irq_reg_writel(i + gc->irq_base,
bgc->reg_base + AT91_AIC5_SSR);
if (mask & gc->wake_active)
irq_reg_writel(1, bgc->reg_base + AT91_AIC5_IECR);
else
irq_reg_writel(1, bgc->reg_base + AT91_AIC5_IDCR);
}
irq_gc_unlock(bgc);
}
static void aic5_resume(struct irq_data *d)
{
struct irq_domain *domain = d->domain;
struct irq_domain_chip_generic *dgc = domain->gc;
struct irq_chip_generic *bgc = dgc->gc[0];
struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
int i;
u32 mask;
irq_gc_lock(bgc);
for (i = 0; i < dgc->irqs_per_chip; i++) {
mask = 1 << i;
if ((mask & gc->mask_cache) == (mask & gc->wake_active))
continue;
irq_reg_writel(i + gc->irq_base,
bgc->reg_base + AT91_AIC5_SSR);
if (mask & gc->mask_cache)
irq_reg_writel(1, bgc->reg_base + AT91_AIC5_IECR);
else
irq_reg_writel(1, bgc->reg_base + AT91_AIC5_IDCR);
}
irq_gc_unlock(bgc);
}
static void aic5_pm_shutdown(struct irq_data *d)
{
struct irq_domain *domain = d->domain;
struct irq_domain_chip_generic *dgc = domain->gc;
struct irq_chip_generic *bgc = dgc->gc[0];
struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
int i;
irq_gc_lock(bgc);
for (i = 0; i < dgc->irqs_per_chip; i++) {
irq_reg_writel(i + gc->irq_base,
bgc->reg_base + AT91_AIC5_SSR);
irq_reg_writel(1, bgc->reg_base + AT91_AIC5_IDCR);
irq_reg_writel(1, bgc->reg_base + AT91_AIC5_ICCR);
}
irq_gc_unlock(bgc);
}
#else
#define aic5_suspend NULL
#define aic5_resume NULL
#define aic5_pm_shutdown NULL
#endif /* CONFIG_PM */
static void __init aic5_hw_init(struct irq_domain *domain)
{
struct irq_chip_generic *gc = irq_get_domain_generic_chip(domain, 0);
int i;
/*
* Perform 8 End Of Interrupt Command to make sure AIC
* will not Lock out nIRQ
*/
for (i = 0; i < 8; i++)
irq_reg_writel(0, gc->reg_base + AT91_AIC5_EOICR);
/*
* Spurious Interrupt ID in Spurious Vector Register.
* When there is no current interrupt, the IRQ Vector Register
* reads the value stored in AIC_SPU
*/
irq_reg_writel(0xffffffff, gc->reg_base + AT91_AIC5_SPU);
/* No debugging in AIC: Debug (Protect) Control Register */
irq_reg_writel(0, gc->reg_base + AT91_AIC5_DCR);
/* Disable and clear all interrupts initially */
for (i = 0; i < domain->revmap_size; i++) {
irq_reg_writel(i, gc->reg_base + AT91_AIC5_SSR);
irq_reg_writel(i, gc->reg_base + AT91_AIC5_SVR);
irq_reg_writel(1, gc->reg_base + AT91_AIC5_IDCR);
irq_reg_writel(1, gc->reg_base + AT91_AIC5_ICCR);
}
}
static int aic5_irq_domain_xlate(struct irq_domain *d,
struct device_node *ctrlr,
const u32 *intspec, unsigned int intsize,
irq_hw_number_t *out_hwirq,
unsigned int *out_type)
{
struct irq_domain_chip_generic *dgc = d->gc;
struct irq_chip_generic *gc;
unsigned smr;
int ret;
if (!dgc)
return -EINVAL;
ret = aic_common_irq_domain_xlate(d, ctrlr, intspec, intsize,
out_hwirq, out_type);
if (ret)
return ret;
gc = dgc->gc[0];
irq_gc_lock(gc);
irq_reg_writel(*out_hwirq, gc->reg_base + AT91_AIC5_SSR);
smr = irq_reg_readl(gc->reg_base + AT91_AIC5_SMR);
ret = aic_common_set_priority(intspec[2], &smr);
if (!ret)
irq_reg_writel(intspec[2] | smr, gc->reg_base + AT91_AIC5_SMR);
irq_gc_unlock(gc);
return ret;
}
static const struct irq_domain_ops aic5_irq_ops = {
.map = irq_map_generic_chip,
.xlate = aic5_irq_domain_xlate,
};
static void __init sama5d3_aic_irq_fixup(struct device_node *root)
{
aic_common_rtc_irq_fixup(root);
}
static const struct of_device_id __initdata aic5_irq_fixups[] = {
{ .compatible = "atmel,sama5d3", .data = sama5d3_aic_irq_fixup },
{ /* sentinel */ },
};
static int __init aic5_of_init(struct device_node *node,
struct device_node *parent,
int nirqs)
{
struct irq_chip_generic *gc;
struct irq_domain *domain;
int nchips;
int i;
if (nirqs > NR_AIC5_IRQS)
return -EINVAL;
if (aic5_domain)
return -EEXIST;
domain = aic_common_of_init(node, &aic5_irq_ops, "atmel-aic5",
nirqs);
if (IS_ERR(domain))
return PTR_ERR(domain);
aic_common_irq_fixup(aic5_irq_fixups);
aic5_domain = domain;
nchips = aic5_domain->revmap_size / 32;
for (i = 0; i < nchips; i++) {
gc = irq_get_domain_generic_chip(domain, i * 32);
gc->chip_types[0].regs.eoi = AT91_AIC5_EOICR;
gc->chip_types[0].chip.irq_mask = aic5_mask;
gc->chip_types[0].chip.irq_unmask = aic5_unmask;
gc->chip_types[0].chip.irq_retrigger = aic5_retrigger;
gc->chip_types[0].chip.irq_set_type = aic5_set_type;
gc->chip_types[0].chip.irq_suspend = aic5_suspend;
gc->chip_types[0].chip.irq_resume = aic5_resume;
gc->chip_types[0].chip.irq_pm_shutdown = aic5_pm_shutdown;
}
aic5_hw_init(domain);
set_handle_irq(aic5_handle);
return 0;
}
#define NR_SAMA5D3_IRQS 50
static int __init sama5d3_aic5_of_init(struct device_node *node,
struct device_node *parent)
{
return aic5_of_init(node, parent, NR_SAMA5D3_IRQS);
}
IRQCHIP_DECLARE(sama5d3_aic5, "atmel,sama5d3-aic", sama5d3_aic5_of_init);

168
drivers/irqchip/irq-crossbar.c
View File

@ -15,22 +15,31 @@
#include <linux/of_irq.h>
#include <linux/slab.h>
#include <linux/irqchip/arm-gic.h>
#include <linux/irqchip/irq-crossbar.h>
#define IRQ_FREE -1
#define IRQ_RESERVED -2
#define IRQ_SKIP -3
#define GIC_IRQ_START 32
/*
/**
* struct crossbar_device - crossbar device description
* @int_max: maximum number of supported interrupts
* @safe_map: safe default value to initialize the crossbar
* @max_crossbar_sources: Maximum number of crossbar sources
* @irq_map: array of interrupts to crossbar number mapping
* @crossbar_base: crossbar base address
* @register_offsets: offsets for each irq number
* @write: register write function pointer
*/
struct crossbar_device {
uint int_max;
uint safe_map;
uint max_crossbar_sources;
uint *irq_map;
void __iomem *crossbar_base;
int *register_offsets;
void (*write) (int, int);
void (*write)(int, int);
};
static struct crossbar_device *cb;
@ -50,11 +59,22 @@ static inline void crossbar_writeb(int irq_no, int cb_no)
writeb(cb_no, cb->crossbar_base + cb->register_offsets[irq_no]);
}
static inline int get_prev_map_irq(int cb_no)
{
int i;
for (i = cb->int_max - 1; i >= 0; i--)
if (cb->irq_map[i] == cb_no)
return i;
return -ENODEV;
}
static inline int allocate_free_irq(int cb_no)
{
int i;
for (i = 0; i < cb->int_max; i++) {
for (i = cb->int_max - 1; i >= 0; i--) {
if (cb->irq_map[i] == IRQ_FREE) {
cb->irq_map[i] = cb_no;
return i;
@ -64,19 +84,47 @@ static inline int allocate_free_irq(int cb_no)
return -ENODEV;
}
static inline bool needs_crossbar_write(irq_hw_number_t hw)
{
int cb_no;
if (hw > GIC_IRQ_START) {
cb_no = cb->irq_map[hw - GIC_IRQ_START];
if (cb_no != IRQ_RESERVED && cb_no != IRQ_SKIP)
return true;
}
return false;
}
static int crossbar_domain_map(struct irq_domain *d, unsigned int irq,
irq_hw_number_t hw)
{
cb->write(hw - GIC_IRQ_START, cb->irq_map[hw - GIC_IRQ_START]);
if (needs_crossbar_write(hw))
cb->write(hw - GIC_IRQ_START, cb->irq_map[hw - GIC_IRQ_START]);
return 0;
}
/**
* crossbar_domain_unmap - unmap a crossbar<->irq connection
* @d: domain of irq to unmap
* @irq: virq number
*
* We do not maintain a use count of total number of map/unmap
* calls for a particular irq to find out if a irq can be really
* unmapped. This is because unmap is called during irq_dispose_mapping(irq),
* after which irq is anyways unusable. So an explicit map has to be called
* after that.
*/
static void crossbar_domain_unmap(struct irq_domain *d, unsigned int irq)
{
irq_hw_number_t hw = irq_get_irq_data(irq)->hwirq;
if (hw > GIC_IRQ_START)
if (needs_crossbar_write(hw)) {
cb->irq_map[hw - GIC_IRQ_START] = IRQ_FREE;
cb->write(hw - GIC_IRQ_START, cb->safe_map);
}
}
static int crossbar_domain_xlate(struct irq_domain *d,
@ -85,18 +133,41 @@ static int crossbar_domain_xlate(struct irq_domain *d,
unsigned long *out_hwirq,
unsigned int *out_type)
{
unsigned long ret;
int ret;
int req_num = intspec[1];
int direct_map_num;
ret = allocate_free_irq(intspec[1]);
if (req_num >= cb->max_crossbar_sources) {
direct_map_num = req_num - cb->max_crossbar_sources;
if (direct_map_num < cb->int_max) {
ret = cb->irq_map[direct_map_num];
if (ret == IRQ_RESERVED || ret == IRQ_SKIP) {
/* We use the interrupt num as h/w irq num */
ret = direct_map_num;
goto found;
}
}
if (IS_ERR_VALUE(ret))
pr_err("%s: requested crossbar number %d > max %d\n",
__func__, req_num, cb->max_crossbar_sources);
return -EINVAL;
}
ret = get_prev_map_irq(req_num);
if (ret >= 0)
goto found;
ret = allocate_free_irq(req_num);
if (ret < 0)
return ret;
found:
*out_hwirq = ret + GIC_IRQ_START;
return 0;
}
const struct irq_domain_ops routable_irq_domain_ops = {
static const struct irq_domain_ops routable_irq_domain_ops = {
.map = crossbar_domain_map,
.unmap = crossbar_domain_unmap,
.xlate = crossbar_domain_xlate
@ -104,22 +175,36 @@ const struct irq_domain_ops routable_irq_domain_ops = {
static int __init crossbar_of_init(struct device_node *node)
{
int i, size, max, reserved = 0, entry;
int i, size, max = 0, reserved = 0, entry;
const __be32 *irqsr;
int ret = -ENOMEM;
cb = kzalloc(sizeof(*cb), GFP_KERNEL);
if (!cb)
return -ENOMEM;
return ret;
cb->crossbar_base = of_iomap(node, 0);
if (!cb->crossbar_base)
goto err1;
goto err_cb;
of_property_read_u32(node, "ti,max-crossbar-sources",
&cb->max_crossbar_sources);
if (!cb->max_crossbar_sources) {
pr_err("missing 'ti,max-crossbar-sources' property\n");
ret = -EINVAL;
goto err_base;
}
of_property_read_u32(node, "ti,max-irqs", &max);
cb->irq_map = kzalloc(max * sizeof(int), GFP_KERNEL);
if (!max) {
pr_err("missing 'ti,max-irqs' property\n");
ret = -EINVAL;
goto err_base;
}
cb->irq_map = kcalloc(max, sizeof(int), GFP_KERNEL);
if (!cb->irq_map)
goto err2;
goto err_base;
cb->int_max = max;
@ -137,15 +222,35 @@ static int __init crossbar_of_init(struct device_node *node)
i, &entry);
if (entry > max) {
pr_err("Invalid reserved entry\n");
goto err3;
ret = -EINVAL;
goto err_irq_map;
}
cb->irq_map[entry] = 0;
cb->irq_map[entry] = IRQ_RESERVED;
}
}
cb->register_offsets = kzalloc(max * sizeof(int), GFP_KERNEL);
/* Skip irqs hardwired to bypass the crossbar */
irqsr = of_get_property(node, "ti,irqs-skip", &size);
if (irqsr) {
size /= sizeof(__be32);
for (i = 0; i < size; i++) {
of_property_read_u32_index(node,
"ti,irqs-skip",
i, &entry);
if (entry > max) {
pr_err("Invalid skip entry\n");
ret = -EINVAL;
goto err_irq_map;
}
cb->irq_map[entry] = IRQ_SKIP;
}
}
cb->register_offsets = kcalloc(max, sizeof(int), GFP_KERNEL);
if (!cb->register_offsets)
goto err3;
goto err_irq_map;
of_property_read_u32(node, "ti,reg-size", &size);
@ -161,7 +266,8 @@ static int __init crossbar_of_init(struct device_node *node)
break;
default:
pr_err("Invalid reg-size property\n");
goto err4;
ret = -EINVAL;
goto err_reg_offset;
break;
}
@ -170,25 +276,37 @@ static int __init crossbar_of_init(struct device_node *node)
* reserved irqs. so find and store the offsets once.
*/
for (i = 0; i < max; i++) {
if (!cb->irq_map[i])
if (cb->irq_map[i] == IRQ_RESERVED)
continue;
cb->register_offsets[i] = reserved;
reserved += size;
}
of_property_read_u32(node, "ti,irqs-safe-map", &cb->safe_map);
/* Initialize the crossbar with safe map to start with */
for (i = 0; i < max; i++) {
if (cb->irq_map[i] == IRQ_RESERVED ||
cb->irq_map[i] == IRQ_SKIP)
continue;
cb->write(i, cb->safe_map);
}
register_routable_domain_ops(&routable_irq_domain_ops);
return 0;
err4:
err_reg_offset:
kfree(cb->register_offsets);
err3:
err_irq_map:
kfree(cb->irq_map);
err2:
err_base:
iounmap(cb->crossbar_base);
err1:
err_cb:
kfree(cb);
return -ENOMEM;
cb = NULL;
return ret;
}
static const struct of_device_id crossbar_match[] __initconst = {

13
drivers/irqchip/irq-nvic.c
View File

@ -49,14 +49,6 @@ nvic_handle_irq(irq_hw_number_t hwirq, struct pt_regs *regs)
handle_IRQ(irq, regs);
}
static void nvic_eoi(struct irq_data *d)
{
/*
* This is a no-op as end of interrupt is signaled by the exception
* return sequence.
*/
}
static int __init nvic_of_init(struct device_node *node,
struct device_node *parent)
{
@ -102,7 +94,10 @@ static int __init nvic_of_init(struct device_node *node,
gc->chip_types[0].regs.disable = NVIC_ICER;
gc->chip_types[0].chip.irq_mask = irq_gc_mask_disable_reg;
gc->chip_types[0].chip.irq_unmask = irq_gc_unmask_enable_reg;
gc->chip_types[0].chip.irq_eoi = nvic_eoi;
/* This is a no-op as end of interrupt is signaled by the
* exception return sequence.
*/
gc->chip_types[0].chip.irq_eoi = irq_gc_noop;
/* disable interrupts */
writel_relaxed(~0, gc->reg_base + NVIC_ICER);

182
drivers/irqchip/irq-or1k-pic.c Normal file
View File

@ -0,0 +1,182 @@
/*
* Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
* Copyright (C) 2014 Stefan Kristansson <stefan.kristiansson@saunalahti.fi>
*
* 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/irq.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/of_address.h>
#include "irqchip.h"
/* OR1K PIC implementation */
struct or1k_pic_dev {
struct irq_chip chip;
irq_flow_handler_t handle;
unsigned long flags;
};
/*
* We're a couple of cycles faster than the generic implementations with
* these 'fast' versions.
*/
static void or1k_pic_mask(struct irq_data *data)
{
mtspr(SPR_PICMR, mfspr(SPR_PICMR) & ~(1UL << data->hwirq));
}
static void or1k_pic_unmask(struct irq_data *data)
{
mtspr(SPR_PICMR, mfspr(SPR_PICMR) | (1UL << data->hwirq));
}
static void or1k_pic_ack(struct irq_data *data)
{
mtspr(SPR_PICSR, (1UL << data->hwirq));
}
static void or1k_pic_mask_ack(struct irq_data *data)
{
mtspr(SPR_PICMR, mfspr(SPR_PICMR) & ~(1UL << data->hwirq));
mtspr(SPR_PICSR, (1UL << data->hwirq));
}
/*
* There are two oddities with the OR1200 PIC implementation:
* i) LEVEL-triggered interrupts are latched and need to be cleared
* ii) the interrupt latch is cleared by writing a 0 to the bit,
* as opposed to a 1 as mandated by the spec
*/
static void or1k_pic_or1200_ack(struct irq_data *data)
{
mtspr(SPR_PICSR, mfspr(SPR_PICSR) & ~(1UL << data->hwirq));
}
static void or1k_pic_or1200_mask_ack(struct irq_data *data)
{
mtspr(SPR_PICMR, mfspr(SPR_PICMR) & ~(1UL << data->hwirq));
mtspr(SPR_PICSR, mfspr(SPR_PICSR) & ~(1UL << data->hwirq));
}
static struct or1k_pic_dev or1k_pic_level = {
.chip = {
.name = "or1k-PIC-level",
.irq_unmask = or1k_pic_unmask,
.irq_mask = or1k_pic_mask,
.irq_mask_ack = or1k_pic_mask,
},
.handle = handle_level_irq,
.flags = IRQ_LEVEL | IRQ_NOPROBE,
};
static struct or1k_pic_dev or1k_pic_edge = {
.chip = {
.name = "or1k-PIC-edge",
.irq_unmask = or1k_pic_unmask,
.irq_mask = or1k_pic_mask,
.irq_ack = or1k_pic_ack,
.irq_mask_ack = or1k_pic_mask_ack,
},
.handle = handle_edge_irq,
.flags = IRQ_LEVEL | IRQ_NOPROBE,
};
static struct or1k_pic_dev or1k_pic_or1200 = {
.chip = {
.name = "or1200-PIC",
.irq_unmask = or1k_pic_unmask,
.irq_mask = or1k_pic_mask,
.irq_ack = or1k_pic_or1200_ack,
.irq_mask_ack = or1k_pic_or1200_mask_ack,
},
.handle = handle_level_irq,
.flags = IRQ_LEVEL | IRQ_NOPROBE,
};
static struct irq_domain *root_domain;
static inline int pic_get_irq(int first)
{
int hwirq;
hwirq = ffs(mfspr(SPR_PICSR) >> first);
if (!hwirq)
return NO_IRQ;
else
hwirq = hwirq + first - 1;
return irq_find_mapping(root_domain, hwirq);
}
static void or1k_pic_handle_irq(struct pt_regs *regs)
{
int irq = -1;
while ((irq = pic_get_irq(irq + 1)) != NO_IRQ)
handle_IRQ(irq, regs);
}
static int or1k_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hw)
{
struct or1k_pic_dev *pic = d->host_data;
irq_set_chip_and_handler(irq, &pic->chip, pic->handle);
irq_set_status_flags(irq, pic->flags);
return 0;
}
static const struct irq_domain_ops or1k_irq_domain_ops = {
.xlate = irq_domain_xlate_onecell,
.map = or1k_map,
};
/*
* This sets up the IRQ domain for the PIC built in to the OpenRISC
* 1000 CPU. This is the "root" domain as these are the interrupts
* that directly trigger an exception in the CPU.
*/
static int __init or1k_pic_init(struct device_node *node,
struct or1k_pic_dev *pic)
{
/* Disable all interrupts until explicitly requested */
mtspr(SPR_PICMR, (0UL));
root_domain = irq_domain_add_linear(node, 32, &or1k_irq_domain_ops,
pic);
set_handle_irq(or1k_pic_handle_irq);
return 0;
}
static int __init or1k_pic_or1200_init(struct device_node *node,
struct device_node *parent)
{
return or1k_pic_init(node, &or1k_pic_or1200);
}
IRQCHIP_DECLARE(or1k_pic_or1200, "opencores,or1200-pic", or1k_pic_or1200_init);
IRQCHIP_DECLARE(or1k_pic, "opencores,or1k-pic", or1k_pic_or1200_init);
static int __init or1k_pic_level_init(struct device_node *node,
struct device_node *parent)
{
return or1k_pic_init(node, &or1k_pic_level);
}
IRQCHIP_DECLARE(or1k_pic_level, "opencores,or1k-pic-level",
or1k_pic_level_init);
static int __init or1k_pic_edge_init(struct device_node *node,
struct device_node *parent)
{
return or1k_pic_init(node, &or1k_pic_edge);
}
IRQCHIP_DECLARE(or1k_pic_edge, "opencores,or1k-pic-edge", or1k_pic_edge_init);

304
drivers/irqchip/spear-shirq.c
View File

@ -19,7 +19,6 @@
#include <linux/io.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/irqchip/spear-shirq.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
@ -27,20 +26,73 @@
#include "irqchip.h"
static DEFINE_SPINLOCK(lock);
/*
* struct spear_shirq: shared irq structure
*
* base: Base register address
* status_reg: Status register offset for chained interrupt handler
* mask_reg: Mask register offset for irq chip
* mask: Mask to apply to the status register
* virq_base: Base virtual interrupt number
* nr_irqs: Number of interrupts handled by this block
* offset: Bit offset of the first interrupt
* irq_chip: Interrupt controller chip used for this instance,
* if NULL group is disabled, but accounted
*/
struct spear_shirq {
void __iomem *base;
u32 status_reg;
u32 mask_reg;
u32 mask;
u32 virq_base;
u32 nr_irqs;
u32 offset;
struct irq_chip *irq_chip;
};
/* spear300 shared irq registers offsets and masks */
#define SPEAR300_INT_ENB_MASK_REG 0x54
#define SPEAR300_INT_STS_MASK_REG 0x58
static DEFINE_RAW_SPINLOCK(shirq_lock);
static void shirq_irq_mask(struct irq_data *d)
{
struct spear_shirq *shirq = irq_data_get_irq_chip_data(d);
u32 val, shift = d->irq - shirq->virq_base + shirq->offset;
u32 __iomem *reg = shirq->base + shirq->mask_reg;
raw_spin_lock(&shirq_lock);
val = readl(reg) & ~(0x1 << shift);
writel(val, reg);
raw_spin_unlock(&shirq_lock);
}
static void shirq_irq_unmask(struct irq_data *d)
{
struct spear_shirq *shirq = irq_data_get_irq_chip_data(d);
u32 val, shift = d->irq - shirq->virq_base + shirq->offset;
u32 __iomem *reg = shirq->base + shirq->mask_reg;
raw_spin_lock(&shirq_lock);
val = readl(reg) | (0x1 << shift);
writel(val, reg);
raw_spin_unlock(&shirq_lock);
}
static struct irq_chip shirq_chip = {
.name = "spear-shirq",
.irq_mask = shirq_irq_mask,
.irq_unmask = shirq_irq_unmask,
};
static struct spear_shirq spear300_shirq_ras1 = {
.irq_nr = 9,
.irq_bit_off = 0,
.regs = {
.enb_reg = SPEAR300_INT_ENB_MASK_REG,
.status_reg = SPEAR300_INT_STS_MASK_REG,
.clear_reg = -1,
},
.offset = 0,
.nr_irqs = 9,
.mask = ((0x1 << 9) - 1) << 0,
.irq_chip = &shirq_chip,
.status_reg = SPEAR300_INT_STS_MASK_REG,
.mask_reg = SPEAR300_INT_ENB_MASK_REG,
};
static struct spear_shirq *spear300_shirq_blocks[] = {
@ -51,43 +103,35 @@ static struct spear_shirq *spear300_shirq_blocks[] = {
#define SPEAR310_INT_STS_MASK_REG 0x04
static struct spear_shirq spear310_shirq_ras1 = {
.irq_nr = 8,
.irq_bit_off = 0,
.regs = {
.enb_reg = -1,
.status_reg = SPEAR310_INT_STS_MASK_REG,
.clear_reg = -1,
},
.offset = 0,
.nr_irqs = 8,
.mask = ((0x1 << 8) - 1) << 0,
.irq_chip = &dummy_irq_chip,
.status_reg = SPEAR310_INT_STS_MASK_REG,
};
static struct spear_shirq spear310_shirq_ras2 = {
.irq_nr = 5,
.irq_bit_off = 8,
.regs = {
.enb_reg = -1,
.status_reg = SPEAR310_INT_STS_MASK_REG,
.clear_reg = -1,
},
.offset = 8,
.nr_irqs = 5,
.mask = ((0x1 << 5) - 1) << 8,
.irq_chip = &dummy_irq_chip,
.status_reg = SPEAR310_INT_STS_MASK_REG,
};
static struct spear_shirq spear310_shirq_ras3 = {
.irq_nr = 1,
.irq_bit_off = 13,
.regs = {
.enb_reg = -1,
.status_reg = SPEAR310_INT_STS_MASK_REG,
.clear_reg = -1,
},
.offset = 13,
.nr_irqs = 1,
.mask = ((0x1 << 1) - 1) << 13,
.irq_chip = &dummy_irq_chip,
.status_reg = SPEAR310_INT_STS_MASK_REG,
};
static struct spear_shirq spear310_shirq_intrcomm_ras = {
.irq_nr = 3,
.irq_bit_off = 14,
.regs = {
.enb_reg = -1,
.status_reg = SPEAR310_INT_STS_MASK_REG,
.clear_reg = -1,
},
.offset = 14,
.nr_irqs = 3,
.mask = ((0x1 << 3) - 1) << 14,
.irq_chip = &dummy_irq_chip,
.status_reg = SPEAR310_INT_STS_MASK_REG,
};
static struct spear_shirq *spear310_shirq_blocks[] = {
@ -102,50 +146,34 @@ static struct spear_shirq *spear310_shirq_blocks[] = {
#define SPEAR320_INT_CLR_MASK_REG 0x04
#define SPEAR320_INT_ENB_MASK_REG 0x08
static struct spear_shirq spear320_shirq_ras3 = {
.offset = 0,
.nr_irqs = 7,
.mask = ((0x1 << 7) - 1) << 0,
};
static struct spear_shirq spear320_shirq_ras1 = {
.irq_nr = 3,
.irq_bit_off = 7,
.regs = {
.enb_reg = -1,
.status_reg = SPEAR320_INT_STS_MASK_REG,
.clear_reg = SPEAR320_INT_CLR_MASK_REG,
.reset_to_clear = 1,
},
.offset = 7,
.nr_irqs = 3,
.mask = ((0x1 << 3) - 1) << 7,
.irq_chip = &dummy_irq_chip,
.status_reg = SPEAR320_INT_STS_MASK_REG,
};
static struct spear_shirq spear320_shirq_ras2 = {
.irq_nr = 1,
.irq_bit_off = 10,
.regs = {
.enb_reg = -1,
.status_reg = SPEAR320_INT_STS_MASK_REG,
.clear_reg = SPEAR320_INT_CLR_MASK_REG,
.reset_to_clear = 1,
},
};
static struct spear_shirq spear320_shirq_ras3 = {
.irq_nr = 7,
.irq_bit_off = 0,
.invalid_irq = 1,
.regs = {
.enb_reg = SPEAR320_INT_ENB_MASK_REG,
.reset_to_enb = 1,
.status_reg = SPEAR320_INT_STS_MASK_REG,
.clear_reg = SPEAR320_INT_CLR_MASK_REG,
.reset_to_clear = 1,
},
.offset = 10,
.nr_irqs = 1,
.mask = ((0x1 << 1) - 1) << 10,
.irq_chip = &dummy_irq_chip,
.status_reg = SPEAR320_INT_STS_MASK_REG,
};
static struct spear_shirq spear320_shirq_intrcomm_ras = {
.irq_nr = 11,
.irq_bit_off = 11,
.regs = {
.enb_reg = -1,
.status_reg = SPEAR320_INT_STS_MASK_REG,
.clear_reg = SPEAR320_INT_CLR_MASK_REG,
.reset_to_clear = 1,
},
.offset = 11,
.nr_irqs = 11,
.mask = ((0x1 << 11) - 1) << 11,
.irq_chip = &dummy_irq_chip,
.status_reg = SPEAR320_INT_STS_MASK_REG,
};
static struct spear_shirq *spear320_shirq_blocks[] = {
@ -155,104 +183,46 @@ static struct spear_shirq *spear320_shirq_blocks[] = {
&spear320_shirq_intrcomm_ras,
};
static void shirq_irq_mask_unmask(struct irq_data *d, bool mask)
{
struct spear_shirq *shirq = irq_data_get_irq_chip_data(d);
u32 val, offset = d->irq - shirq->irq_base;
unsigned long flags;
if (shirq->regs.enb_reg == -1)
return;
spin_lock_irqsave(&lock, flags);
val = readl(shirq->base + shirq->regs.enb_reg);
if (mask ^ shirq->regs.reset_to_enb)
val &= ~(0x1 << shirq->irq_bit_off << offset);
else
val |= 0x1 << shirq->irq_bit_off << offset;
writel(val, shirq->base + shirq->regs.enb_reg);
spin_unlock_irqrestore(&lock, flags);
}
static void shirq_irq_mask(struct irq_data *d)
{
shirq_irq_mask_unmask(d, 1);
}
static void shirq_irq_unmask(struct irq_data *d)
{
shirq_irq_mask_unmask(d, 0);
}
static struct irq_chip shirq_chip = {
.name = "spear-shirq",
.irq_ack = shirq_irq_mask,
.irq_mask = shirq_irq_mask,
.irq_unmask = shirq_irq_unmask,
};
static void shirq_handler(unsigned irq, struct irq_desc *desc)
{
u32 i, j, val, mask, tmp;
struct irq_chip *chip;
struct spear_shirq *shirq = irq_get_handler_data(irq);
u32 pend;
chip = irq_get_chip(irq);
chip->irq_ack(&desc->irq_data);
pend = readl(shirq->base + shirq->status_reg) & shirq->mask;
pend >>= shirq->offset;
mask = ((0x1 << shirq->irq_nr) - 1) << shirq->irq_bit_off;
while ((val = readl(shirq->base + shirq->regs.status_reg) &
mask)) {
while (pend) {
int irq = __ffs(pend);
val >>= shirq->irq_bit_off;
for (i = 0, j = 1; i < shirq->irq_nr; i++, j <<= 1) {
if (!(j & val))
continue;
generic_handle_irq(shirq->irq_base + i);
/* clear interrupt */
if (shirq->regs.clear_reg == -1)
continue;
tmp = readl(shirq->base + shirq->regs.clear_reg);
if (shirq->regs.reset_to_clear)
tmp &= ~(j << shirq->irq_bit_off);
else
tmp |= (j << shirq->irq_bit_off);
writel(tmp, shirq->base + shirq->regs.clear_reg);
}
pend &= ~(0x1 << irq);
generic_handle_irq(shirq->virq_base + irq);
}
chip->irq_unmask(&desc->irq_data);
}
static void __init spear_shirq_register(struct spear_shirq *shirq)
static void __init spear_shirq_register(struct spear_shirq *shirq,
int parent_irq)
{
int i;
if (shirq->invalid_irq)
if (!shirq->irq_chip)
return;
irq_set_chained_handler(shirq->irq, shirq_handler);
for (i = 0; i < shirq->irq_nr; i++) {
irq_set_chip_and_handler(shirq->irq_base + i,
&shirq_chip, handle_simple_irq);
set_irq_flags(shirq->irq_base + i, IRQF_VALID);
irq_set_chip_data(shirq->irq_base + i, shirq);
}
irq_set_chained_handler(parent_irq, shirq_handler);
irq_set_handler_data(parent_irq, shirq);
irq_set_handler_data(shirq->irq, shirq);
for (i = 0; i < shirq->nr_irqs; i++) {
irq_set_chip_and_handler(shirq->virq_base + i,
shirq->irq_chip, handle_simple_irq);
set_irq_flags(shirq->virq_base + i, IRQF_VALID);
irq_set_chip_data(shirq->virq_base + i, shirq);
}
}
static int __init shirq_init(struct spear_shirq **shirq_blocks, int block_nr,
struct device_node *np)
{
int i, irq_base, hwirq = 0, irq_nr = 0;
static struct irq_domain *shirq_domain;
int i, parent_irq, virq_base, hwirq = 0, nr_irqs = 0;
struct irq_domain *shirq_domain;
void __iomem *base;
base = of_iomap(np, 0);
@ -262,15 +232,15 @@ static int __init shirq_init(struct spear_shirq **shirq_blocks, int block_nr,
}
for (i = 0; i < block_nr; i++)
irq_nr += shirq_blocks[i]->irq_nr;
nr_irqs += shirq_blocks[i]->nr_irqs;
irq_base = irq_alloc_descs(-1, 0, irq_nr, 0);
if (IS_ERR_VALUE(irq_base)) {
virq_base = irq_alloc_descs(-1, 0, nr_irqs, 0);
if (IS_ERR_VALUE(virq_base)) {
pr_err("%s: irq desc alloc failed\n", __func__);
goto err_unmap;
}
shirq_domain = irq_domain_add_legacy(np, irq_nr, irq_base, 0,
shirq_domain = irq_domain_add_legacy(np, nr_irqs, virq_base, 0,
&irq_domain_simple_ops, NULL);
if (WARN_ON(!shirq_domain)) {
pr_warn("%s: irq domain init failed\n", __func__);
@ -279,41 +249,41 @@ static int __init shirq_init(struct spear_shirq **shirq_blocks, int block_nr,
for (i = 0; i < block_nr; i++) {
shirq_blocks[i]->base = base;
shirq_blocks[i]->irq_base = irq_find_mapping(shirq_domain,
shirq_blocks[i]->virq_base = irq_find_mapping(shirq_domain,
hwirq);
shirq_blocks[i]->irq = irq_of_parse_and_map(np, i);
spear_shirq_register(shirq_blocks[i]);
hwirq += shirq_blocks[i]->irq_nr;
parent_irq = irq_of_parse_and_map(np, i);
spear_shirq_register(shirq_blocks[i], parent_irq);
hwirq += shirq_blocks[i]->nr_irqs;
}
return 0;
err_free_desc:
irq_free_descs(irq_base, irq_nr);
irq_free_descs(virq_base, nr_irqs);
err_unmap:
iounmap(base);
return -ENXIO;
}
int __init spear300_shirq_of_init(struct device_node *np,
struct device_node *parent)
static int __init spear300_shirq_of_init(struct device_node *np,
struct device_node *parent)
{
return shirq_init(spear300_shirq_blocks,
ARRAY_SIZE(spear300_shirq_blocks), np);
}
IRQCHIP_DECLARE(spear300_shirq, "st,spear300-shirq", spear300_shirq_of_init);
int __init spear310_shirq_of_init(struct device_node *np,
struct device_node *parent)
static int __init spear310_shirq_of_init(struct device_node *np,
struct device_node *parent)
{
return shirq_init(spear310_shirq_blocks,
ARRAY_SIZE(spear310_shirq_blocks), np);
}
IRQCHIP_DECLARE(spear310_shirq, "st,spear310-shirq", spear310_shirq_of_init);
int __init spear320_shirq_of_init(struct device_node *np,
struct device_node *parent)
static int __init spear320_shirq_of_init(struct device_node *np,
struct device_node *parent)
{
return shirq_init(spear320_shirq_blocks,
ARRAY_SIZE(spear320_shirq_blocks), np);

2
include/linux/irq.h
View File

@ -771,6 +771,8 @@ void irq_gc_eoi(struct irq_data *d);
int irq_gc_set_wake(struct irq_data *d, unsigned int on);
/* Setup functions for irq_chip_generic */
int irq_map_generic_chip(struct irq_domain *d, unsigned int virq,
irq_hw_number_t hw_irq);
struct irq_chip_generic *
irq_alloc_generic_chip(const char *name, int nr_ct, unsigned int irq_base,
void __iomem *reg_base, irq_flow_handler_t handler);

64
include/linux/irqchip/spear-shirq.h
View File

@ -1,64 +0,0 @@
/*
* SPEAr platform shared irq layer header file
*
* Copyright (C) 2009-2012 ST Microelectronics
* Viresh Kumar <viresh.linux@gmail.com>
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#ifndef __SPEAR_SHIRQ_H
#define __SPEAR_SHIRQ_H
#include <linux/irq.h>
#include <linux/types.h>
/*
* struct shirq_regs: shared irq register configuration
*
* enb_reg: enable register offset
* reset_to_enb: val 1 indicates, we need to clear bit for enabling interrupt
* status_reg: status register offset
* status_reg_mask: status register valid mask
* clear_reg: clear register offset
* reset_to_clear: val 1 indicates, we need to clear bit for clearing interrupt
*/
struct shirq_regs {
u32 enb_reg;
u32 reset_to_enb;
u32 status_reg;
u32 clear_reg;
u32 reset_to_clear;
};
/*
* struct spear_shirq: shared irq structure
*
* irq: hardware irq number
* irq_base: base irq in linux domain
* irq_nr: no. of shared interrupts in a particular block
* irq_bit_off: starting bit offset in the status register
* invalid_irq: irq group is currently disabled
* base: base address of shared irq register
* regs: register configuration for shared irq block
*/
struct spear_shirq {
u32 irq;
u32 irq_base;
u32 irq_nr;
u32 irq_bit_off;
int invalid_irq;
void __iomem *base;
struct shirq_regs regs;
};
int __init spear300_shirq_of_init(struct device_node *np,
struct device_node *parent);
int __init spear310_shirq_of_init(struct device_node *np,
struct device_node *parent);
int __init spear320_shirq_of_init(struct device_node *np,
struct device_node *parent);
#endif /* __SPEAR_SHIRQ_H */

2
include/linux/irqdomain.h
View File

@ -172,6 +172,8 @@ extern int irq_domain_associate(struct irq_domain *domain, unsigned int irq,
extern void irq_domain_associate_many(struct irq_domain *domain,
unsigned int irq_base,
irq_hw_number_t hwirq_base, int count);
extern void irq_domain_disassociate(struct irq_domain *domain,
unsigned int irq);
extern unsigned int irq_create_mapping(struct irq_domain *host,
irq_hw_number_t hwirq);

5
kernel/irq/generic-chip.c
View File

@ -341,8 +341,8 @@ static struct lock_class_key irq_nested_lock_class;
/*
* irq_map_generic_chip - Map a generic chip for an irq domain
*/
static int irq_map_generic_chip(struct irq_domain *d, unsigned int virq,
irq_hw_number_t hw_irq)
int irq_map_generic_chip(struct irq_domain *d, unsigned int virq,
irq_hw_number_t hw_irq)
{
struct irq_data *data = irq_get_irq_data(virq);
struct irq_domain_chip_generic *dgc = d->gc;
@ -394,6 +394,7 @@ static int irq_map_generic_chip(struct irq_domain *d, unsigned int virq,
irq_modify_status(virq, dgc->irq_flags_to_clear, dgc->irq_flags_to_set);
return 0;
}
EXPORT_SYMBOL_GPL(irq_map_generic_chip);
struct irq_domain_ops irq_generic_chip_ops = {
.map = irq_map_generic_chip,

2
kernel/irq/irqdomain.c
View File

@ -231,7 +231,7 @@ void irq_set_default_host(struct irq_domain *domain)
}
EXPORT_SYMBOL_GPL(irq_set_default_host);
static void irq_domain_disassociate(struct irq_domain *domain, unsigned int irq)
void irq_domain_disassociate(struct irq_domain *domain, unsigned int irq)
{
struct irq_data *irq_data = irq_get_irq_data(irq);
irq_hw_number_t hwirq;