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irqchip: atmel-aic: Add atmel AIC/AIC5 drivers 

Add AIC (Advanced Interrupt Controller) and AIC5 (AIC5 is an evolution of
the AIC block) drivers.
Put common code in irq-atmel-aic-common.c/.h so that both driver can access
shared functions (this will ease maintenance).

These drivers are only compatible with dt enabled board and replace the
old implementation found in arch/arm/mach-at91/irq.c.

Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Link: https://lkml.kernel.org/r/1405012462-766-4-git-send-email-boris.brezillon@free-electrons.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
hifive-unleashed-5.1
Boris BREZILLON 2014-07-10 19:14:18 +02:00 committed by Jason Cooper
parent e9a0caa3d5
commit b1479ebb77
6 changed files with 846 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/irqchip/Kconfig
View File

@ -30,6 +30,20 @@ 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

2
drivers/irqchip/Makefile
View File

@ -18,6 +18,8 @@ obj-$(CONFIG_ARCH_SPEAR3XX) += spear-shirq.o
obj-$(CONFIG_ARM_GIC) += irq-gic.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

207
drivers/irqchip/irq-atmel-aic-common.c 100644
View File

@ -0,0 +1,207 @@
/*
* 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));
}
}
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);
}

35
drivers/irqchip/irq-atmel-aic-common.h 100644
View File

@ -0,0 +1,35 @@
/*
* 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);
#endif /* __IRQ_ATMEL_AIC_COMMON_H */

247
drivers/irqchip/irq-atmel-aic.c 100644
View File

@ -0,0 +1,247 @@
/*
* 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 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_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);

341
drivers/irqchip/irq-atmel-aic5.c 100644
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@ -0,0 +1,341 @@
/*
* 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 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);
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);