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Commit 4932e397 authored by Lennert Buytenhek's avatar Lennert Buytenhek Committed by Russell King
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[ARM] 4122/1: ep93xx: add support for GPIO port F interrupts 

Signed-off-by: default avatarLennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent fac105d0
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Showing with 73 additions and 30 deletions
arch/arm/mach-ep93xx/core.c
View file @ 4932e397
......@@ -152,22 +152,29 @@ struct sys_timer ep93xx_timer = {
/*************************************************************************
* GPIO handling for EP93xx
*************************************************************************/
static unsigned char gpio_int_enable[2];
static unsigned char gpio_int_type1[2];
static unsigned char gpio_int_type2[2];
static unsigned char gpio_int_enable[3];
static unsigned char gpio_int_type1[3];
static unsigned char gpio_int_type2[3];
static void update_gpio_ab_int_params(int port)
static void update_gpio_int_params(int abf)
{
if (port == 0) {
if (abf == 0) {
__raw_writeb(0, EP93XX_GPIO_A_INT_ENABLE);
__raw_writeb(gpio_int_type2[0], EP93XX_GPIO_A_INT_TYPE2);
__raw_writeb(gpio_int_type1[0], EP93XX_GPIO_A_INT_TYPE1);
__raw_writeb(gpio_int_enable[0], EP93XX_GPIO_A_INT_ENABLE);
} else if (port == 1) {
} else if (abf == 1) {
__raw_writeb(0, EP93XX_GPIO_B_INT_ENABLE);
__raw_writeb(gpio_int_type2[1], EP93XX_GPIO_B_INT_TYPE2);
__raw_writeb(gpio_int_type1[1], EP93XX_GPIO_B_INT_TYPE1);
__raw_writeb(gpio_int_enable[1], EP93XX_GPIO_B_INT_ENABLE);
} else if (abf == 2) {
__raw_writeb(0, EP93XX_GPIO_F_INT_ENABLE);
__raw_writeb(gpio_int_type2[2], EP93XX_GPIO_F_INT_TYPE2);
__raw_writeb(gpio_int_type1[2], EP93XX_GPIO_F_INT_TYPE1);
__raw_writeb(gpio_int_enable[2], EP93XX_GPIO_F_INT_ENABLE);
} else {
BUG();
}
}
......@@ -192,8 +199,13 @@ void gpio_line_config(int line, int direction)
local_irq_save(flags);
if (direction == GPIO_OUT) {
if (line >= 0 && line < 16) {
/* Port A/B. */
gpio_int_enable[line >> 3] &= ~(1 << (line & 7));
update_gpio_ab_int_params(line >> 3);
update_gpio_int_params(line >> 3);
} else if (line >= 40 && line < 48) {
/* Port F. */
gpio_int_enable[2] &= ~(1 << (line & 7));
update_gpio_int_params(2);
}
v = __raw_readb(data_direction_register);
......@@ -244,8 +256,7 @@ EXPORT_SYMBOL(gpio_line_set);
/*************************************************************************
* EP93xx IRQ handling
*************************************************************************/
static void ep93xx_gpio_ab_irq_handler(unsigned int irq,
struct irq_desc *desc)
static void ep93xx_gpio_ab_irq_handler(unsigned int irq, struct irq_desc *desc)
{
unsigned char status;
int i;
......@@ -267,37 +278,46 @@ static void ep93xx_gpio_ab_irq_handler(unsigned int irq,
}
}
static void ep93xx_gpio_ab_irq_mask_ack(unsigned int irq)
static void ep93xx_gpio_f_irq_handler(unsigned int irq, struct irq_desc *desc)
{
int gpio_irq = IRQ_EP93XX_GPIO(16) + (((irq + 1) & 7) ^ 4);
desc_handle_irq(gpio_irq, irq_desc + gpio_irq);
}
static void ep93xx_gpio_irq_mask_ack(unsigned int irq)
{
int line = irq - IRQ_EP93XX_GPIO(0);
int port = line >> 3;
gpio_int_enable[port] &= ~(1 << (line & 7));
update_gpio_ab_int_params(port);
update_gpio_int_params(port);
if (line >> 3) {
__raw_writel(1 << (line & 7), EP93XX_GPIO_B_INT_ACK);
} else {
if (port == 0) {
__raw_writel(1 << (line & 7), EP93XX_GPIO_A_INT_ACK);
} else if (port == 1) {
__raw_writel(1 << (line & 7), EP93XX_GPIO_B_INT_ACK);
} else if (port == 2) {
__raw_writel(1 << (line & 7), EP93XX_GPIO_F_INT_ACK);
}
}
static void ep93xx_gpio_ab_irq_mask(unsigned int irq)
static void ep93xx_gpio_irq_mask(unsigned int irq)
{
int line = irq - IRQ_EP93XX_GPIO(0);
int port = line >> 3;
gpio_int_enable[port] &= ~(1 << (line & 7));
update_gpio_ab_int_params(port);
update_gpio_int_params(port);
}
static void ep93xx_gpio_ab_irq_unmask(unsigned int irq)
static void ep93xx_gpio_irq_unmask(unsigned int irq)
{
int line = irq - IRQ_EP93XX_GPIO(0);
int port = line >> 3;
gpio_int_enable[port] |= 1 << (line & 7);
update_gpio_ab_int_params(port);
update_gpio_int_params(port);
}
......@@ -306,13 +326,17 @@ static void ep93xx_gpio_ab_irq_unmask(unsigned int irq)
* edge (1) triggered, while gpio_int_type2 controls whether it
* triggers on low/falling (0) or high/rising (1).
*/
static int ep93xx_gpio_ab_irq_type(unsigned int irq, unsigned int type)
static int ep93xx_gpio_irq_type(unsigned int irq, unsigned int type)
{
int port;
int line;
line = irq - IRQ_EP93XX_GPIO(0);
gpio_line_config(line, GPIO_IN);
if (line >= 0 && line < 16) {
gpio_line_config(line, GPIO_IN);
} else {
gpio_line_config(EP93XX_GPIO_LINE_F(line), GPIO_IN);
}
port = line >> 3;
line &= 7;
......@@ -330,16 +354,17 @@ static int ep93xx_gpio_ab_irq_type(unsigned int irq, unsigned int type)
gpio_int_type1[port] &= ~(1 << line);
gpio_int_type2[port] &= ~(1 << line);
}
update_gpio_ab_int_params(port);
update_gpio_int_params(port);
return 0;
}
static struct irq_chip ep93xx_gpio_ab_irq_chip = {
.ack = ep93xx_gpio_ab_irq_mask_ack,
.mask = ep93xx_gpio_ab_irq_mask,
.unmask = ep93xx_gpio_ab_irq_unmask,
.set_type = ep93xx_gpio_ab_irq_type,
static struct irq_chip ep93xx_gpio_irq_chip = {
.name = "GPIO",
.ack = ep93xx_gpio_irq_mask_ack,
.mask = ep93xx_gpio_irq_mask,
.unmask = ep93xx_gpio_irq_unmask,
.set_type = ep93xx_gpio_irq_type,
};
......@@ -350,12 +375,21 @@ void __init ep93xx_init_irq(void)
vic_init((void *)EP93XX_VIC1_BASE, 0, EP93XX_VIC1_VALID_IRQ_MASK);
vic_init((void *)EP93XX_VIC2_BASE, 32, EP93XX_VIC2_VALID_IRQ_MASK);
for (irq = IRQ_EP93XX_GPIO(0) ; irq <= IRQ_EP93XX_GPIO(15); irq++) {
set_irq_chip(irq, &ep93xx_gpio_ab_irq_chip);
for (irq = IRQ_EP93XX_GPIO(0); irq <= IRQ_EP93XX_GPIO(23); irq++) {
set_irq_chip(irq, &ep93xx_gpio_irq_chip);
set_irq_handler(irq, handle_level_irq);
set_irq_flags(irq, IRQF_VALID);
}
set_irq_chained_handler(IRQ_EP93XX_GPIO_AB, ep93xx_gpio_ab_irq_handler);
set_irq_chained_handler(IRQ_EP93XX_GPIO0MUX, ep93xx_gpio_f_irq_handler);
set_irq_chained_handler(IRQ_EP93XX_GPIO1MUX, ep93xx_gpio_f_irq_handler);
set_irq_chained_handler(IRQ_EP93XX_GPIO2MUX, ep93xx_gpio_f_irq_handler);
set_irq_chained_handler(IRQ_EP93XX_GPIO3MUX, ep93xx_gpio_f_irq_handler);
set_irq_chained_handler(IRQ_EP93XX_GPIO4MUX, ep93xx_gpio_f_irq_handler);
set_irq_chained_handler(IRQ_EP93XX_GPIO5MUX, ep93xx_gpio_f_irq_handler);
set_irq_chained_handler(IRQ_EP93XX_GPIO6MUX, ep93xx_gpio_f_irq_handler);
set_irq_chained_handler(IRQ_EP93XX_GPIO7MUX, ep93xx_gpio_f_irq_handler);
}
......
include/asm-arm/arch-ep93xx/ep93xx-regs.h
View file @ 4932e397
......@@ -73,6 +73,11 @@
#define EP93XX_GPIO_BASE (EP93XX_APB_VIRT_BASE + 0x00040000)
#define EP93XX_GPIO_REG(x) (EP93XX_GPIO_BASE + (x))
#define EP93XX_GPIO_F_INT_TYPE1 EP93XX_GPIO_REG(0x4c)
#define EP93XX_GPIO_F_INT_TYPE2 EP93XX_GPIO_REG(0x50)
#define EP93XX_GPIO_F_INT_ACK EP93XX_GPIO_REG(0x54)
#define EP93XX_GPIO_F_INT_ENABLE EP93XX_GPIO_REG(0x58)
#define EP93XX_GPIO_F_INT_STATUS EP93XX_GPIO_REG(0x5c)
#define EP93XX_GPIO_A_INT_TYPE1 EP93XX_GPIO_REG(0x90)
#define EP93XX_GPIO_A_INT_TYPE2 EP93XX_GPIO_REG(0x94)
#define EP93XX_GPIO_A_INT_ACK EP93XX_GPIO_REG(0x98)
......
include/asm-arm/arch-ep93xx/irqs.h
View file @ 4932e397
......@@ -67,9 +67,13 @@
#define IRQ_EP93XX_SAI 60
#define EP93XX_VIC2_VALID_IRQ_MASK 0x1fffffff
#define IRQ_EP93XX_GPIO(x) (64 + (x))
/*
* Map GPIO A0..A7 to irq 64..71, B0..B7 to 72..79, and
* F0..F7 to 80..87.
*/
#define IRQ_EP93XX_GPIO(x) (64 + (((x) + (((x) >> 2) & 8)) & 0x1f))
#define NR_EP93XX_IRQS IRQ_EP93XX_GPIO(16)
#define NR_EP93XX_IRQS (64 + 24)
#define EP93XX_BOARD_IRQ(x) (NR_EP93XX_IRQS + (x))
#define EP93XX_BOARD_IRQS 32
......
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