aboutsummaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-pxa/irq.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/mach-pxa/irq.c')
-rw-r--r--arch/arm/mach-pxa/irq.c336
1 files changed, 35 insertions, 301 deletions
diff --git a/arch/arm/mach-pxa/irq.c b/arch/arm/mach-pxa/irq.c
index 36c6a68beca2..a9a0c3fab159 100644
--- a/arch/arm/mach-pxa/irq.c
+++ b/arch/arm/mach-pxa/irq.c
@@ -1,7 +1,7 @@
/*
* linux/arch/arm/mach-pxa/irq.c
*
- * Generic PXA IRQ handling, GPIO IRQ demultiplexing, etc.
+ * Generic PXA IRQ handling
*
* Author: Nicolas Pitre
* Created: Jun 15, 2001
@@ -21,308 +21,58 @@
#include <asm/irq.h>
#include <asm/mach/irq.h>
#include <asm/arch/pxa-regs.h>
+#include <asm/arch/pxa2xx-gpio.h>
#include "generic.h"
+#define IRQ_BIT(n) (((n) - PXA_IRQ(0)) & 0x1f)
+#define _ICMR(n) (*((((n) - PXA_IRQ(0)) & ~0x1f) ? &ICMR2 : &ICMR))
+#define _ICLR(n) (*((((n) - PXA_IRQ(0)) & ~0x1f) ? &ICLR2 : &ICLR))
/*
* This is for peripheral IRQs internal to the PXA chip.
*/
-static void pxa_mask_low_irq(unsigned int irq)
+static int pxa_internal_irq_nr;
+
+static void pxa_mask_irq(unsigned int irq)
{
- ICMR &= ~(1 << irq);
+ _ICMR(irq) &= ~(1 << IRQ_BIT(irq));
}
-static void pxa_unmask_low_irq(unsigned int irq)
+static void pxa_unmask_irq(unsigned int irq)
{
- ICMR |= (1 << irq);
+ _ICMR(irq) |= 1 << IRQ_BIT(irq);
}
-static struct irq_chip pxa_internal_chip_low = {
+static struct irq_chip pxa_internal_irq_chip = {
.name = "SC",
- .ack = pxa_mask_low_irq,
- .mask = pxa_mask_low_irq,
- .unmask = pxa_unmask_low_irq,
+ .ack = pxa_mask_irq,
+ .mask = pxa_mask_irq,
+ .unmask = pxa_unmask_irq,
};
-void __init pxa_init_irq_low(void)
+void __init pxa_init_irq(int irq_nr, set_wake_t fn)
{
int irq;
- /* disable all IRQs */
- ICMR = 0;
+ pxa_internal_irq_nr = irq_nr;
- /* all IRQs are IRQ, not FIQ */
- ICLR = 0;
+ for (irq = 0; irq < irq_nr; irq += 32) {
+ _ICMR(irq) = 0; /* disable all IRQs */
+ _ICLR(irq) = 0; /* all IRQs are IRQ, not FIQ */
+ }
/* only unmasked interrupts kick us out of idle */
ICCR = 1;
- for (irq = PXA_IRQ(0); irq <= PXA_IRQ(31); irq++) {
- set_irq_chip(irq, &pxa_internal_chip_low);
- set_irq_handler(irq, handle_level_irq);
- set_irq_flags(irq, IRQF_VALID);
- }
-}
-
-#if defined(CONFIG_PXA27x) || defined(CONFIG_PXA3xx)
-
-/*
- * This is for the second set of internal IRQs as found on the PXA27x.
- */
-
-static void pxa_mask_high_irq(unsigned int irq)
-{
- ICMR2 &= ~(1 << (irq - 32));
-}
-
-static void pxa_unmask_high_irq(unsigned int irq)
-{
- ICMR2 |= (1 << (irq - 32));
-}
-
-static struct irq_chip pxa_internal_chip_high = {
- .name = "SC-hi",
- .ack = pxa_mask_high_irq,
- .mask = pxa_mask_high_irq,
- .unmask = pxa_unmask_high_irq,
-};
-
-void __init pxa_init_irq_high(void)
-{
- int irq;
-
- ICMR2 = 0;
- ICLR2 = 0;
-
- for (irq = PXA_IRQ(32); irq < PXA_IRQ(64); irq++) {
- set_irq_chip(irq, &pxa_internal_chip_high);
+ for (irq = PXA_IRQ(0); irq < PXA_IRQ(irq_nr); irq++) {
+ set_irq_chip(irq, &pxa_internal_irq_chip);
set_irq_handler(irq, handle_level_irq);
set_irq_flags(irq, IRQF_VALID);
}
-}
-#endif
-
-/*
- * PXA GPIO edge detection for IRQs:
- * IRQs are generated on Falling-Edge, Rising-Edge, or both.
- * Use this instead of directly setting GRER/GFER.
- */
-
-static long GPIO_IRQ_rising_edge[4];
-static long GPIO_IRQ_falling_edge[4];
-static long GPIO_IRQ_mask[4];
-
-static int pxa_gpio_irq_type(unsigned int irq, unsigned int type)
-{
- int gpio, idx;
-
- gpio = IRQ_TO_GPIO(irq);
- idx = gpio >> 5;
-
- if (type == IRQT_PROBE) {
- /* Don't mess with enabled GPIOs using preconfigured edges or
- GPIOs set to alternate function or to output during probe */
- if ((GPIO_IRQ_rising_edge[idx] | GPIO_IRQ_falling_edge[idx] | GPDR(gpio)) &
- GPIO_bit(gpio))
- return 0;
- if (GAFR(gpio) & (0x3 << (((gpio) & 0xf)*2)))
- return 0;
- type = __IRQT_RISEDGE | __IRQT_FALEDGE;
- }
-
- /* printk(KERN_DEBUG "IRQ%d (GPIO%d): ", irq, gpio); */
-
- pxa_gpio_mode(gpio | GPIO_IN);
-
- if (type & __IRQT_RISEDGE) {
- /* printk("rising "); */
- __set_bit (gpio, GPIO_IRQ_rising_edge);
- } else {
- __clear_bit (gpio, GPIO_IRQ_rising_edge);
- }
-
- if (type & __IRQT_FALEDGE) {
- /* printk("falling "); */
- __set_bit (gpio, GPIO_IRQ_falling_edge);
- } else {
- __clear_bit (gpio, GPIO_IRQ_falling_edge);
- }
-
- /* printk("edges\n"); */
-
- GRER(gpio) = GPIO_IRQ_rising_edge[idx] & GPIO_IRQ_mask[idx];
- GFER(gpio) = GPIO_IRQ_falling_edge[idx] & GPIO_IRQ_mask[idx];
- return 0;
-}
-
-/*
- * GPIO IRQs must be acknowledged. This is for GPIO 0 and 1.
- */
-
-static void pxa_ack_low_gpio(unsigned int irq)
-{
- GEDR0 = (1 << (irq - IRQ_GPIO0));
-}
-
-static struct irq_chip pxa_low_gpio_chip = {
- .name = "GPIO-l",
- .ack = pxa_ack_low_gpio,
- .mask = pxa_mask_low_irq,
- .unmask = pxa_unmask_low_irq,
- .set_type = pxa_gpio_irq_type,
-};
-
-/*
- * Demux handler for GPIO>=2 edge detect interrupts
- */
-
-static void pxa_gpio_demux_handler(unsigned int irq, struct irq_desc *desc)
-{
- unsigned int mask;
- int loop;
-
- do {
- loop = 0;
-
- mask = GEDR0 & GPIO_IRQ_mask[0] & ~3;
- if (mask) {
- GEDR0 = mask;
- irq = IRQ_GPIO(2);
- desc = irq_desc + irq;
- mask >>= 2;
- do {
- if (mask & 1)
- desc_handle_irq(irq, desc);
- irq++;
- desc++;
- mask >>= 1;
- } while (mask);
- loop = 1;
- }
-
- mask = GEDR1 & GPIO_IRQ_mask[1];
- if (mask) {
- GEDR1 = mask;
- irq = IRQ_GPIO(32);
- desc = irq_desc + irq;
- do {
- if (mask & 1)
- desc_handle_irq(irq, desc);
- irq++;
- desc++;
- mask >>= 1;
- } while (mask);
- loop = 1;
- }
-
- mask = GEDR2 & GPIO_IRQ_mask[2];
- if (mask) {
- GEDR2 = mask;
- irq = IRQ_GPIO(64);
- desc = irq_desc + irq;
- do {
- if (mask & 1)
- desc_handle_irq(irq, desc);
- irq++;
- desc++;
- mask >>= 1;
- } while (mask);
- loop = 1;
- }
-
- mask = GEDR3 & GPIO_IRQ_mask[3];
- if (mask) {
- GEDR3 = mask;
- irq = IRQ_GPIO(96);
- desc = irq_desc + irq;
- do {
- if (mask & 1)
- desc_handle_irq(irq, desc);
- irq++;
- desc++;
- mask >>= 1;
- } while (mask);
- loop = 1;
- }
- } while (loop);
-}
-
-static void pxa_ack_muxed_gpio(unsigned int irq)
-{
- int gpio = irq - IRQ_GPIO(2) + 2;
- GEDR(gpio) = GPIO_bit(gpio);
-}
-
-static void pxa_mask_muxed_gpio(unsigned int irq)
-{
- int gpio = irq - IRQ_GPIO(2) + 2;
- __clear_bit(gpio, GPIO_IRQ_mask);
- GRER(gpio) &= ~GPIO_bit(gpio);
- GFER(gpio) &= ~GPIO_bit(gpio);
-}
-
-static void pxa_unmask_muxed_gpio(unsigned int irq)
-{
- int gpio = irq - IRQ_GPIO(2) + 2;
- int idx = gpio >> 5;
- __set_bit(gpio, GPIO_IRQ_mask);
- GRER(gpio) = GPIO_IRQ_rising_edge[idx] & GPIO_IRQ_mask[idx];
- GFER(gpio) = GPIO_IRQ_falling_edge[idx] & GPIO_IRQ_mask[idx];
-}
-
-static struct irq_chip pxa_muxed_gpio_chip = {
- .name = "GPIO",
- .ack = pxa_ack_muxed_gpio,
- .mask = pxa_mask_muxed_gpio,
- .unmask = pxa_unmask_muxed_gpio,
- .set_type = pxa_gpio_irq_type,
-};
-
-void __init pxa_init_irq_gpio(int gpio_nr)
-{
- int irq, i;
-
- pxa_last_gpio = gpio_nr - 1;
-
- /* clear all GPIO edge detects */
- for (i = 0; i < gpio_nr; i += 32) {
- GFER(i) = 0;
- GRER(i) = 0;
- GEDR(i) = GEDR(i);
- }
-
- /* GPIO 0 and 1 must have their mask bit always set */
- GPIO_IRQ_mask[0] = 3;
-
- for (irq = IRQ_GPIO0; irq <= IRQ_GPIO1; irq++) {
- set_irq_chip(irq, &pxa_low_gpio_chip);
- set_irq_handler(irq, handle_edge_irq);
- set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
- }
- for (irq = IRQ_GPIO(2); irq < IRQ_GPIO(gpio_nr); irq++) {
- set_irq_chip(irq, &pxa_muxed_gpio_chip);
- set_irq_handler(irq, handle_edge_irq);
- set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
- }
-
- /* Install handler for GPIO>=2 edge detect interrupts */
- set_irq_chip(IRQ_GPIO_2_x, &pxa_internal_chip_low);
- set_irq_chained_handler(IRQ_GPIO_2_x, pxa_gpio_demux_handler);
-
- pxa_init_gpio(gpio_nr);
-}
-
-void __init pxa_init_irq_set_wake(int (*set_wake)(unsigned int, unsigned int))
-{
- pxa_internal_chip_low.set_wake = set_wake;
-#ifdef CONFIG_PXA27x
- pxa_internal_chip_high.set_wake = set_wake;
-#endif
- pxa_low_gpio_chip.set_wake = set_wake;
- pxa_muxed_gpio_chip.set_wake = set_wake;
+ pxa_internal_irq_chip.set_wake = fn;
}
#ifdef CONFIG_PM
@@ -330,19 +80,11 @@ static unsigned long saved_icmr[2];
static int pxa_irq_suspend(struct sys_device *dev, pm_message_t state)
{
- switch (dev->id) {
- case 0:
- saved_icmr[0] = ICMR;
- ICMR = 0;
- break;
-#if defined(CONFIG_PXA27x) || defined(CONFIG_PXA3xx)
- case 1:
- saved_icmr[1] = ICMR2;
- ICMR2 = 0;
- break;
-#endif
- default:
- return -EINVAL;
+ int i, irq = PXA_IRQ(0);
+
+ for (i = 0; irq < PXA_IRQ(pxa_internal_irq_nr); i++, irq += 32) {
+ saved_icmr[i] = _ICMR(irq);
+ _ICMR(irq) = 0;
}
return 0;
@@ -350,22 +92,14 @@ static int pxa_irq_suspend(struct sys_device *dev, pm_message_t state)
static int pxa_irq_resume(struct sys_device *dev)
{
- switch (dev->id) {
- case 0:
- ICMR = saved_icmr[0];
- ICLR = 0;
- ICCR = 1;
- break;
-#if defined(CONFIG_PXA27x) || defined(CONFIG_PXA3xx)
- case 1:
- ICMR2 = saved_icmr[1];
- ICLR2 = 0;
- break;
-#endif
- default:
- return -EINVAL;
+ int i, irq = PXA_IRQ(0);
+
+ for (i = 0; irq < PXA_IRQ(pxa_internal_irq_nr); i++, irq += 32) {
+ _ICMR(irq) = saved_icmr[i];
+ _ICLR(irq) = 0;
}
+ ICCR = 1;
return 0;
}
#else
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.