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authorAndrew Victor <andrew@sanpeople.com>2006-11-30 10:01:47 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2006-11-30 22:51:36 +0000
commit1f4fd0a0d28fabf965815755f1a74ef91dfb5ca6 (patch)
tree09562e8467136cf545b5631a257a0e9d53a31a89 /arch/arm/mach-at91rm9200
parent20127f6863990e1313178debe8c9cfe32d43b1dc (diff)
downloadlinux-2.6.34-ux500-1f4fd0a0d28fabf965815755f1a74ef91dfb5ca6.tar.gz
[ARM] 3946/1: AT91: at91_arch_reset and at91_extern_irq
The external interrupt sources are different on the various AT91 processors. This patch introduces the global 'at91_extern_irq' variable that contains a bitset of the available external interrupt sources. The processor reset mechanism also differs on the various AT91 processors. This patch also adds a global 'at91_arch_reset' callback (from system.h) into the processor-specific code to perform the reset. Signed-off-by: Andrew Victor <andrew@sanpeople.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mach-at91rm9200')
-rw-r--r--arch/arm/mach-at91rm9200/at91rm9200.c17
-rw-r--r--arch/arm/mach-at91rm9200/generic.h3
-rw-r--r--arch/arm/mach-at91rm9200/irq.c14
-rw-r--r--arch/arm/mach-at91rm9200/pm.c9
4 files changed, 31 insertions, 12 deletions
diff --git a/arch/arm/mach-at91rm9200/at91rm9200.c b/arch/arm/mach-at91rm9200/at91rm9200.c
index dcf6136fedf..0422593032f 100644
--- a/arch/arm/mach-at91rm9200/at91rm9200.c
+++ b/arch/arm/mach-at91rm9200/at91rm9200.c
@@ -14,6 +14,7 @@
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
+#include <asm/arch/at91rm9200.h>
#include <asm/hardware.h>
#include "generic.h"
@@ -222,6 +223,16 @@ static struct at91_gpio_bank at91rm9200_gpio[] = {
}
};
+static void at91rm9200_reset(void)
+{
+ /*
+ * Perform a hardware reset with the use of the Watchdog timer.
+ */
+ at91_sys_write(AT91_ST_WDMR, AT91_ST_RSTEN | AT91_ST_EXTEN | 1);
+ at91_sys_write(AT91_ST_CR, AT91_ST_WDRST);
+}
+
+
/* --------------------------------------------------------------------
* AT91RM9200 processor initialization
* -------------------------------------------------------------------- */
@@ -230,6 +241,12 @@ void __init at91rm9200_initialize(unsigned long main_clock, unsigned short banks
/* Map peripherals */
iotable_init(at91rm9200_io_desc, ARRAY_SIZE(at91rm9200_io_desc));
+ at91_arch_reset = at91rm9200_reset;
+ at91_extern_irq = (1 << AT91RM9200_ID_IRQ0) | (1 << AT91RM9200_ID_IRQ1)
+ | (1 << AT91RM9200_ID_IRQ2) | (1 << AT91RM9200_ID_IRQ3)
+ | (1 << AT91RM9200_ID_IRQ4) | (1 << AT91RM9200_ID_IRQ5)
+ | (1 << AT91RM9200_ID_IRQ6);
+
/* Init clock subsystem */
at91_clock_init(main_clock);
diff --git a/arch/arm/mach-at91rm9200/generic.h b/arch/arm/mach-at91rm9200/generic.h
index 694e411e285..fd98e353c5a 100644
--- a/arch/arm/mach-at91rm9200/generic.h
+++ b/arch/arm/mach-at91rm9200/generic.h
@@ -39,3 +39,6 @@ struct at91_gpio_bank {
};
extern void __init at91_gpio_init(struct at91_gpio_bank *, int nr_banks);
extern void __init at91_gpio_irq_setup(void);
+
+extern void (*at91_arch_reset)(void);
+extern int at91_extern_irq;
diff --git a/arch/arm/mach-at91rm9200/irq.c b/arch/arm/mach-at91rm9200/irq.c
index 3e488117ca9..2cea07a34a8 100644
--- a/arch/arm/mach-at91rm9200/irq.c
+++ b/arch/arm/mach-at91rm9200/irq.c
@@ -47,6 +47,10 @@ static void at91_aic_unmask_irq(unsigned int irq)
at91_sys_write(AT91_AIC_IECR, 1 << irq);
}
+unsigned int at91_extern_irq;
+
+#define is_extern_irq(irq) ((1 << (irq)) & at91_extern_irq)
+
static int at91_aic_set_type(unsigned irq, unsigned type)
{
unsigned int smr, srctype;
@@ -59,14 +63,16 @@ static int at91_aic_set_type(unsigned irq, unsigned type)
srctype = AT91_AIC_SRCTYPE_RISING;
break;
case IRQT_LOW:
- if ((irq > AT91_ID_FIQ) && (irq < AT91RM9200_ID_IRQ0)) /* only supported on external interrupts */
+ if ((irq == AT91_ID_FIQ) || is_extern_irq(irq)) /* only supported on external interrupts */
+ srctype = AT91_AIC_SRCTYPE_LOW;
+ else
return -EINVAL;
- srctype = AT91_AIC_SRCTYPE_LOW;
break;
case IRQT_FALLING:
- if ((irq > AT91_ID_FIQ) && (irq < AT91RM9200_ID_IRQ0)) /* only supported on external interrupts */
+ if ((irq == AT91_ID_FIQ) || is_extern_irq(irq)) /* only supported on external interrupts */
+ srctype = AT91_AIC_SRCTYPE_FALLING;
+ else
return -EINVAL;
- srctype = AT91_AIC_SRCTYPE_FALLING;
break;
default:
return -EINVAL;
diff --git a/arch/arm/mach-at91rm9200/pm.c b/arch/arm/mach-at91rm9200/pm.c
index 32c95d8eaac..5e3b6e306f1 100644
--- a/arch/arm/mach-at91rm9200/pm.c
+++ b/arch/arm/mach-at91rm9200/pm.c
@@ -112,7 +112,6 @@ EXPORT_SYMBOL(at91_suspend_entering_slow_clock);
static void (*slow_clock)(void);
-
static int at91_pm_enter(suspend_state_t state)
{
at91_gpio_suspend();
@@ -123,13 +122,7 @@ static int at91_pm_enter(suspend_state_t state)
(at91_sys_read(AT91_PMC_PCSR)
| (1 << AT91_ID_FIQ)
| (1 << AT91_ID_SYS)
- | (1 << AT91RM9200_ID_IRQ0)
- | (1 << AT91RM9200_ID_IRQ1)
- | (1 << AT91RM9200_ID_IRQ2)
- | (1 << AT91RM9200_ID_IRQ3)
- | (1 << AT91RM9200_ID_IRQ4)
- | (1 << AT91RM9200_ID_IRQ5)
- | (1 << AT91RM9200_ID_IRQ6))
+ | (at91_extern_irq))
& at91_sys_read(AT91_AIC_IMR),
state);