/*
* linux/arch/arm/mach-omap/gpio.c
*
* Support functions for OMAP GPIO
*
* Copyright (C) 2003 Nokia Corporation
* Written by Juha Yrjölä <juha.yrjola@nokia.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/config.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/interrupt.h>
#include <linux/ptrace.h>
#include <asm/hardware.h>
#include <asm/irq.h>
#include <asm/arch/irqs.h>
#include <asm/arch/gpio.h>
#include <asm/mach/irq.h>
#include <asm/io.h>
/*
* OMAP1510 GPIO registers
*/
#define OMAP1510_GPIO_BASE 0xfffce000
#define OMAP1510_GPIO_DATA_INPUT 0x00
#define OMAP1510_GPIO_DATA_OUTPUT 0x04
#define OMAP1510_GPIO_DIR_CONTROL 0x08
#define OMAP1510_GPIO_INT_CONTROL 0x0c
#define OMAP1510_GPIO_INT_MASK 0x10
#define OMAP1510_GPIO_INT_STATUS 0x14
#define OMAP1510_GPIO_PIN_CONTROL 0x18
#define OMAP1510_IH_GPIO_BASE 64
/*
* OMAP1610 specific GPIO registers
*/
#define OMAP1610_GPIO1_BASE 0xfffbe400
#define OMAP1610_GPIO2_BASE 0xfffbec00
#define OMAP1610_GPIO3_BASE 0xfffbb400
#define OMAP1610_GPIO4_BASE 0xfffbbc00
#define OMAP1610_GPIO_REVISION 0x0000
#define OMAP1610_GPIO_SYSCONFIG 0x0010
#define OMAP1610_GPIO_SYSSTATUS 0x0014
#define OMAP1610_GPIO_IRQSTATUS1 0x0018
#define OMAP1610_GPIO_IRQENABLE1 0x001c
#define OMAP1610_GPIO_DATAIN 0x002c
#define OMAP1610_GPIO_DATAOUT 0x0030
#define OMAP1610_GPIO_DIRECTION 0x0034
#define OMAP1610_GPIO_EDGE_CTRL1 0x0038
#define OMAP1610_GPIO_EDGE_CTRL2 0x003c
#define OMAP1610_GPIO_CLEAR_IRQENABLE1 0x009c
#define OMAP1610_GPIO_CLEAR_DATAOUT 0x00b0
#define OMAP1610_GPIO_SET_IRQENABLE1 0x00dc
#define OMAP1610_GPIO_SET_DATAOUT 0x00f0
/*
* OMAP730 specific GPIO registers
*/
#define OMAP730_GPIO1_BASE 0xfffbc000
#define OMAP730_GPIO2_BASE 0xfffbc800
#define OMAP730_GPIO3_BASE 0xfffbd000
#define OMAP730_GPIO4_BASE 0xfffbd800
#define OMAP730_GPIO5_BASE 0xfffbe000
#define OMAP730_GPIO6_BASE 0xfffbe800
#define OMAP730_GPIO_DATA_INPUT 0x00
#define OMAP730_GPIO_DATA_OUTPUT 0x04
#define OMAP730_GPIO_DIR_CONTROL 0x08
#define OMAP730_GPIO_INT_CONTROL 0x0c
#define OMAP730_GPIO_INT_MASK 0x10
#define OMAP730_GPIO_INT_STATUS 0x14
#define OMAP_MPUIO_MASK (~OMAP_MAX_GPIO_LINES & 0xff)
struct gpio_bank {
u32 base;
u16 irq;
u16 virtual_irq_start;
u8 method;
u32 reserved_map;
spinlock_t lock;
};
#define METHOD_MPUIO 0
#define METHOD_GPIO_1510 1
#define METHOD_GPIO_1610 2
#define METHOD_GPIO_730 3
#if defined(CONFIG_ARCH_OMAP16XX)
static struct gpio_bank gpio_bank_1610[5] = {
{ OMAP_MPUIO_BASE, INT_MPUIO, IH_MPUIO_BASE, METHOD_MPUIO},
{ OMAP1610_GPIO1_BASE, INT_GPIO_BANK1, IH_GPIO_BASE, METHOD_GPIO_1610 },
{ OMAP1610_GPIO2_BASE, INT_1610_GPIO_BANK2, IH_GPIO_BASE + 16, METHOD_GPIO_1610 },
{ OMAP1610_GPIO3_BASE, INT_1610_GPIO_BANK3, IH_GPIO_BASE + 32, METHOD_GPIO_1610 },
{ OMAP1610_GPIO4_BASE, INT_1610_GPIO_BANK4, IH_GPIO_BASE + 48, METHOD_GPIO_1610 },
};
#endif
#ifdef CONFIG_ARCH_OMAP1510
static struct gpio_bank gpio_bank_1510[2] = {
{ OMAP_MPUIO_BASE, INT_MPUIO, IH_MPUIO_BASE, METHOD_MPUIO },
{ OMAP1510_GPIO_BASE, INT_GPIO_BANK1, IH_GPIO_BASE, METHOD_GPIO_1510 }
};
#endif
#ifdef CONFIG_ARCH_OMAP730
static struct gpio_bank gpio_bank_730[7] = {
{ OMAP_MPUIO_BASE, INT_730_MPUIO, IH_MPUIO_BASE, METHOD_MPUIO },
{ OMAP730_GPIO1_BASE, INT_730_GPIO_BANK1, IH_GPIO_BASE, METHOD_GPIO_730 },
{ OMAP730_GPIO2_BASE, INT_730_GPIO_BANK2, IH_GPIO_BASE + 32, METHOD_GPIO_730 },
{ OMAP730_GPIO3_BASE, INT_730_GPIO_BANK3, IH_GPIO_BASE + 64, METHOD_GPIO_730 },
{ OMAP730_GPIO4_BASE, INT_730_GPIO_BANK4, IH_GPIO_BASE + 96, METHOD_GPIO_730 },
{ OMAP730_GPIO5_BASE, INT_730_GPIO_BANK5, IH_GPIO_BASE + 128, METHOD_GPIO_730 },
{ OMAP730_GPIO6_BASE, INT_730_GPIO_BANK6, IH_GPIO_BASE + 160, METHOD_GPIO_730 },
};
#endif
static struct gpio_bank *gpio_bank;
static int gpio_bank_count;
static inline struct gpio_bank *get_gpio_bank(int gpio)
{
#ifdef CONFIG_ARCH_OMAP1510
if (cpu_is_omap1510()) {
if (OMAP_GPIO_IS_MPUIO(gpio))
return &gpio_bank[0];
return &gpio_bank[1];
}
#endif
#if defined(CONFIG_ARCH_OMAP16XX)
if (cpu_is_omap16xx()) {
if (OMAP_GPIO_IS_MPUIO(gpio))
return &gpio_bank[0];
return &gpio_bank[1 + (gpio >> 4)];
}
#endif
#ifdef CONFIG_ARCH_OMAP730
if (cpu_is_omap730()) {
if (OMAP_GPIO_IS_MPUIO(gpio))
return &gpio_bank[0];
return &gpio_bank[1 + (gpio >> 5)];
}
#endif
}
static inline int get_gpio_index(int gpio)
{
if (cpu_is_omap730())
return gpio & 0x1f;
else
return gpio & 0x0f;
}
static inline int gpio_valid(int gpio)
{
if (gpio < 0)
return -1;
if (OMAP_GPIO_IS_MPUIO(gpio)) {
if ((gpio & OMAP_MPUIO_MASK) > 16)
return -1;
return 0;
}
#ifdef CONFIG_ARCH_OMAP1510
if (cpu_is_omap1510() && gpio < 16)
return 0;
#endif
#if defined(CONFIG_ARCH_OMAP16XX)
if ((cpu_is_omap16xx()) && gpio < 64)
return 0;
#endif
#ifdef CONFIG_ARCH_OMAP730
if (cpu_is_omap730() && gpio < 192)
return 0;
#endif
return -1;
}
static int check_gpio(int gpio)
{
if (unlikely(gpio_valid(gpio)) < 0) {
printk(KERN_ERR "omap-gpio: invalid GPIO %d\n", gpio);
dump_stack();
return -1;
}
return 0;
}
static void _set_gpio_direction(struct gpio_bank *bank, int gpio, int is_input)
{
u32 reg = bank->base;
u32 l;
switch (bank->method) {
case METHOD_MPUIO:
reg += OMAP_MPUIO_IO_CNTL;
break;
case METHOD_GPIO_1510:
reg += OMAP1510_GPIO_DIR_CONTROL;
break;
case METHOD_GPIO_1610:
reg += OMAP1610_GPIO_DIRECTION;
break;
case METHOD_GPIO_730:
reg += OMAP730_GPIO_DIR_CONTROL;
break;
}
l = __raw_readl(reg);
if (is_input)
l |= 1 << gpio;
else
l &= ~(1 << gpio);
__raw_writel(l, reg);
}
void omap_set_gpio_direction(int gpio, int is_input)
{
struct gpio_bank *bank;
if (check_gpio(gpio) < 0)
return;
bank = get_gpio_bank(gpio);
spin_lock(&bank->lock);
_set_gpio_direction(bank, get_gpio_index(gpio), is_input);
spin_unlock(&bank->lock);
}
static void _set_gpio_dataout(struct gpio_bank *bank, int gpio, int enable)
{
u32 reg = bank->base;
u32 l = 0;
switch (bank->method) {
case METHOD_MPUIO:
reg += OMAP_MPUIO_OUTPUT;
l = __raw_readl(reg);
if (enable)
l |= 1 << gpio;
else
l &= ~(1 << gpio);
break;
case METHOD_GPIO_1510:
reg += OMAP1510_GPIO_DATA_OUTPUT;
l = __raw_readl(reg);
if (enable)
l |= 1 << gpio;
else
l &= ~(1 << gpio);
break;
case METHOD_GPIO_1610:
if (enable)
reg += OMAP1610_GPIO_SET_DATAOUT;
else
reg += OMAP1610_GPIO_CLEAR_DATAOUT;
l = 1 << gpio;
break;
case METHOD_GPIO_730:
reg += OMAP730_GPIO_DATA_OUTPUT;
l = __raw_readl(reg);
if (enable)
l |= 1 << gpio;
else
l &= ~(1 << gpio);
break;
default:
BUG();
return;
}
__raw_writel(l, reg);
}
void omap_set_gpio_dataout(int gpio, int enable)
{
struct gpio_bank *bank;
if (check_gpio(gpio) < 0)
return;
bank = get_gpio_bank(gpio);
spin_lock(&bank->lock);
_set_gpio_dataout(bank, get_gpio_index(gpio), enable);
spin_unlock(&bank->lock);
}
int omap_get_gpio_datain(int gpio)
{
struct gpio_bank *bank;
u32 reg;
if (check_gpio(gpio) < 0)
return -1;
bank = get_gpio_bank(gpio);
reg = bank->base;
switch (bank->method) {
case METHOD_MPUIO:
reg += OMAP_MPUIO_INPUT_LATCH;
break;
case METHOD_GPIO_1510:
reg += OMAP1510_GPIO_DATA_INPUT;
break;
case METHOD_GPIO_1610:
reg += OMAP1610_GPIO_DATAIN;
break;
case METHOD_GPIO_730:
reg += OMAP730_GPIO_DATA_INPUT;
break;
default:
BUG();
return -1;
}
return (__raw_readl(reg) & (1 << get_gpio_index(gpio))) != 0;
}
static void _set_gpio_edge_ctrl(struct gpio_bank *bank, int gpio, int edge)
{
u32 reg = bank->base;
u32 l;
switch (bank->method) {
case METHOD_MPUIO:
reg += OMAP_MPUIO_GPIO_INT_EDGE;
l = __raw_readl(reg);
if (edge == OMAP_GPIO_RISING_EDGE)
l |= 1 << gpio;
else
l &= ~(1 << gpio);
__raw_writel(l, reg);
break;
case METHOD_GPIO_1510:
reg += OMAP1510_GPIO_INT_CONTROL;
l = __raw_readl(reg);
if (edge == OMAP_GPIO_RISING_EDGE)
l |= 1 << gpio;
else
l &= ~(1 << gpio);
__raw_writel(l, reg);
break;
case METHOD_GPIO_1610:
edge &= 0x03;
if (gpio & 0x08)
reg += OMAP1610_GPIO_EDGE_CTRL2;
else
reg += OMAP1610_GPIO_EDGE_CTRL1;
gpio &= 0x07;
l = __raw_readl(reg);
l &= ~(3 << (gpio << 1));
l |= edge << (gpio << 1);
__raw_writel(l, reg);
break;
case METHOD_GPIO_730:
reg += OMAP730_GPIO_INT_CONTROL;
l = __raw_readl(reg);
if (edge == OMAP_GPIO_RISING_EDGE)
l |= 1 << gpio;
else
l &= ~(1 << gpio);
__raw_writel(l, reg);
break;
default:
BUG();
return;
}
}
void omap_set_gpio_edge_ctrl(int gpio, int edge)
{
struct gpio_bank *bank;
if (check_gpio(gpio) < 0)
return;
bank = get_gpio_bank(gpio);
spin_lock(&bank->lock);
_set_gpio_edge_ctrl(bank, get_gpio_index(gpio), edge);
spin_unlock(&bank->lock);
}
static int _get_gpio_edge_ctrl(struct gpio_bank *bank, int gpio)
{
u32 reg = bank->base, l;
switch (bank->method) {
case METHOD_MPUIO:
l = __raw_readl(reg + OMAP_MPUIO_GPIO_INT_EDGE);
return (l & (1 << gpio)) ?
OMAP_GPIO_RISING_EDGE : OMAP_GPIO_FALLING_EDGE;
case METHOD_GPIO_1510:
l = __raw_readl(reg + OMAP1510_GPIO_INT_CONTROL);
return (l & (1 << gpio)) ?
OMAP_GPIO_RISING_EDGE : OMAP_GPIO_FALLING_EDGE;
case METHOD_GPIO_1610:
if (gpio & 0x08)
reg += OMAP1610_GPIO_EDGE_CTRL2;
else
reg += OMAP1610_GPIO_EDGE_CTRL1;
return (__raw_readl(reg) >> ((gpio & 0x07) << 1)) & 0x03;
case METHOD_GPIO_730:
l = __raw_readl(reg + OMAP730_GPIO_INT_CONTROL);
return (l & (1 << gpio)) ?
OMAP_GPIO_RISING_EDGE : OMAP_GPIO_FALLING_EDGE;
default:
BUG();
return -1;
}
}
static void _clear_gpio_irqbank(struct gpio_bank *bank, int gpio_mask)
{
u32 reg = bank->base;
switch (bank->method) {
case METHOD_MPUIO:
/* MPUIO irqstatus is reset by reading the status register,
* so do nothing here */
return;
case METHOD_GPIO_1510:
reg += OMAP1510_GPIO_INT_STATUS;
break;
case METHOD_GPIO_1610:
reg += OMAP1610_GPIO_IRQSTATUS1;
break;
case METHOD_GPIO_730:
reg += OMAP730_GPIO_INT_STATUS;
break;
default:
BUG();
return;
}
__raw_writel(gpio_mask, reg);
}
static inline void _clear_gpio_irqstatus(struct gpio_bank *bank, int gpio)
{
_clear_gpio_irqbank(bank, 1 << get_gpio_index(gpio));
}
static void _enable_gpio_irqbank(struct gpio_bank *bank, int gpio_mask, int enable)
{
u32 reg = bank->base;
u32 l;
switch (bank->method) {
case METHOD_MPUIO:
reg += OMAP_MPUIO_GPIO_MASKIT;
l = __raw_readl(reg);
if (enable)
l &= ~(gpio_mask);
else
l |= gpio_mask;
break;
case METHOD_GPIO_1510:
reg += OMAP1510_GPIO_INT_MASK;
l = __raw_readl(reg);
if (enable)
l &= ~(gpio_mask);
else
l |= gpio_mask;
break;
case METHOD_GPIO_1610:
if (enable)
reg += OMAP1610_GPIO_SET_IRQENABLE1;
else
reg += OMAP1610_GPIO_CLEAR_IRQENABLE1;
l = gpio_mask;
break;
case METHOD_GPIO_730:
reg += OMAP730_GPIO_INT_MASK;
l = __raw_readl(reg);
if (enable)
l &= ~(gpio_mask);
else
l |= gpio_mask;
break;
default:
BUG();
return;
}
__raw_writel(l, reg);
}
static inline void _set_gpio_irqenable(struct gpio_bank *bank, int gpio, int enable)
{
_enable_gpio_irqbank(bank, 1 << get_gpio_index(gpio), enable);
}
int omap_request_gpio(int gpio)
{
struct gpio_bank *bank;
if (check_gpio(gpio) < 0)
return -EINVAL;
bank = get_gpio_bank(gpio);
spin_lock(&bank->lock);
if (unlikely(bank->reserved_map & (1 << get_gpio_index(gpio)))) {
printk(KERN_ERR "omap-gpio: GPIO %d is already reserved!\n", gpio);
dump_stack();
spin_unlock(&bank->lock);
return -1;
}
bank->reserved_map |= (1 << get_gpio_index(gpio));
#ifdef CONFIG_ARCH_OMAP1510
if (bank->method == METHOD_GPIO_1510) {
u32 reg;
/* Claim the pin for the ARM */
reg = bank->base + OMAP1510_GPIO_PIN_CONTROL;
__raw_writel(__raw_readl(reg) | (1 << get_gpio_index(gpio)), reg);
}
#endif
spin_unlock(&bank->lock);
return 0;
}
void omap_free_gpio(int gpio)
{
struct gpio_bank *bank;
if (check_gpio(gpio) < 0)
return;
bank = get_gpio_bank(gpio);
spin_lock(&bank->lock);
if (unlikely(!(bank->reserved_map & (1 << get_gpio_index(gpio))))) {
printk(KERN_ERR "omap-gpio: GPIO %d wasn't reserved!\n", gpio);
dump_stack();
spin_unlock(&bank->lock);
return;
}
bank->reserved_map &= ~(1 << get_gpio_index(gpio));
_set_gpio_direction(bank, get_gpio_index(gpio), 1);
_set_gpio_irqenable(bank, gpio, 0);
_clear_gpio_irqstatus(bank, gpio);
spin_unlock(&bank->lock);
}
/*
* We need to unmask the GPIO bank interrupt as soon as possible to
* avoid missing GPIO interrupts for other lines in the bank.
* Then we need to mask-read-clear-unmask the triggered GPIO lines
* in the bank to avoid missing nested interrupts for a GPIO line.
* If we wait to unmask individual GPIO lines in the bank after the
* line's interrupt handler has been run, we may miss some nested
* interrupts.
*/
static void gpio_irq_handler(unsigned int irq, struct irqdesc *desc,
struct pt_regs *regs)
{
u32 isr_reg = 0;
u32 isr;
unsigned int gpio_irq;
struct gpio_bank *bank;
desc->chip->ack(irq);
bank = (struct gpio_bank *) desc->data;
if (bank->method == METHOD_MPUIO)
isr_reg = bank->base + OMAP_MPUIO_GPIO_INT;
#ifdef CONFIG_ARCH_OMAP1510
if (bank->method == METHOD_GPIO_1510)
isr_reg = bank->base + OMAP1510_GPIO_INT_STATUS;
#endif
#if defined(CONFIG_ARCH_OMAP16XX)
if (bank->method == METHOD_GPIO_1610)
isr_reg = bank->base + OMAP1610_GPIO_IRQSTATUS1;
#endif
#ifdef CONFIG_ARCH_OMAP730
if (bank->method == METHOD_GPIO_730)
isr_reg = bank->base + OMAP730_GPIO_INT_STATUS;
#endif
isr = __raw_readl(isr_reg);
_enable_gpio_irqbank(bank, isr, 0);
_clear_gpio_irqbank(bank, isr);
_enable_gpio_irqbank(bank, isr, 1);
desc->chip->unmask(irq);
if (unlikely(!isr))
return;
gpio_irq = bank->virtual_irq_start;
for (; isr != 0; isr >>= 1, gpio_irq++) {
struct irqdesc *d;
if (!(isr & 1))
continue;
d = irq_desc + gpio_irq;
d->handle(gpio_irq, d, regs);
}
}
static void gpio_ack_irq(unsigned int irq)
{
unsigned int gpio = irq - IH_GPIO_BASE;
struct gpio_bank *bank = get_gpio_bank(gpio);
_clear_gpio_irqstatus(bank, gpio);
}
static void gpio_mask_irq(unsigned int irq)
{
unsigned int gpio = irq - IH_GPIO_BASE;
struct gpio_bank *bank = get_gpio_bank(gpio);
_set_gpio_irqenable(bank, gpio, 0);
}
static void gpio_unmask_irq(unsigned int irq)
{
unsigned int gpio = irq - IH_GPIO_BASE;
struct gpio_bank *bank = get_gpio_bank(gpio);
if (_get_gpio_edge_ctrl(bank, get_gpio_index(gpio)) == OMAP_GPIO_NO_EDGE) {
printk(KERN_ERR "OMAP GPIO %d: trying to enable GPIO IRQ while no edge is set\n",
gpio);
_set_gpio_edge_ctrl(bank, get_gpio_index(gpio), OMAP_GPIO_RISING_EDGE);
}
_set_gpio_irqenable(bank, gpio, 1);
}
static void mpuio_ack_irq(unsigned int irq)
{
/* The ISR is reset automatically, so do nothing here. */
}
static void mpuio_mask_irq(unsigned int irq)
{
unsigned int gpio = OMAP_MPUIO(irq - IH_MPUIO_BASE);
struct gpio_bank *bank = get_gpio_bank(gpio);
_set_gpio_irqenable(bank, gpio, 0);
}
static void mpuio_unmask_irq(unsigned int irq)
{
unsigned int gpio = OMAP_MPUIO(irq - IH_MPUIO_BASE);
struct gpio_bank *bank = get_gpio_bank(gpio);
_set_gpio_irqenable(bank, gpio, 1);
}
static struct irqchip gpio_irq_chip = {
.ack = gpio_ack_irq,
.mask = gpio_mask_irq,
.unmask = gpio_unmask_irq,
};
static struct irqchip mpuio_irq_chip = {
.ack = mpuio_ack_irq,
.mask = mpuio_mask_irq,
.unmask = mpuio_unmask_irq
};
static int initialized = 0;
static int __init _omap_gpio_init(void)
{
int i;
struct gpio_bank *bank;
initialized = 1;
#ifdef CONFIG_ARCH_OMAP1510
if (cpu_is_omap1510()) {
printk(KERN_INFO "OMAP1510 GPIO hardware\n");
gpio_bank_count = 2;
gpio_bank = gpio_bank_1510;
}
#endif
#if defined(CONFIG_ARCH_OMAP16XX)
if (cpu_is_omap16xx()) {
int rev;
gpio_bank_count = 5;
gpio_bank = gpio_bank_1610;
rev = omap_readw(gpio_bank[1].base + OMAP1610_GPIO_REVISION);
printk(KERN_INFO "OMAP GPIO hardware version %d.%d\n",
(rev >> 4) & 0x0f, rev & 0x0f);
}
#endif
#ifdef CONFIG_ARCH_OMAP730
if (cpu_is_omap730()) {
printk(KERN_INFO "OMAP730 GPIO hardware\n");
gpio_bank_count = 7;
gpio_bank = gpio_bank_730;
}
#endif
for (i = 0; i < gpio_bank_count; i++) {
int j, gpio_count = 16;
bank = &gpio_bank[i];
bank->reserved_map = 0;
bank->base = IO_ADDRESS(bank->base);
spin_lock_init(&bank->lock);
if (bank->method == METHOD_MPUIO) {
omap_writew(0xFFFF, OMAP_MPUIO_BASE + OMAP_MPUIO_GPIO_MASKIT);
}
#ifdef CONFIG_ARCH_OMAP1510
if (bank->method == METHOD_GPIO_1510) {
__raw_writew(0xffff, bank->base + OMAP1510_GPIO_INT_MASK);
__raw_writew(0x0000, bank->base + OMAP1510_GPIO_INT_STATUS);
}
#endif
#if defined(CONFIG_ARCH_OMAP16XX)
if (bank->method == METHOD_GPIO_1610) {
__raw_writew(0x0000, bank->base + OMAP1610_GPIO_IRQENABLE1);
__raw_writew(0xffff, bank->base + OMAP1610_GPIO_IRQSTATUS1);
}
#endif
#ifdef CONFIG_ARCH_OMAP730
if (bank->method == METHOD_GPIO_730) {
__raw_writel(0xffffffff, bank->base + OMAP730_GPIO_INT_MASK);
__raw_writel(0x00000000, bank->base + OMAP730_GPIO_INT_STATUS);
gpio_count = 32; /* 730 has 32-bit GPIOs */
}
#endif
for (j = bank->virtual_irq_start;
j < bank->virtual_irq_start + gpio_count; j++) {
if (bank->method == METHOD_MPUIO)
set_irq_chip(j, &mpuio_irq_chip);
else
set_irq_chip(j, &gpio_irq_chip);
set_irq_handler(j, do_simple_IRQ);
set_irq_flags(j, IRQF_VALID);
}
set_irq_chained_handler(bank->irq, gpio_irq_handler);
set_irq_data(bank->irq, bank);
}
/* Enable system clock for GPIO module.
* The CAM_CLK_CTRL *is* really the right place. */
if (cpu_is_omap1610() || cpu_is_omap1710())
omap_writel(omap_readl(ULPD_CAM_CLK_CTRL) | 0x04, ULPD_CAM_CLK_CTRL);
return 0;
}
/*
* This may get called early from board specific init
*/
int omap_gpio_init(void)
{
if (!initialized)
return _omap_gpio_init();
else
return 0;
}
EXPORT_SYMBOL(omap_request_gpio);
EXPORT_SYMBOL(omap_free_gpio);
EXPORT_SYMBOL(omap_set_gpio_direction);
EXPORT_SYMBOL(omap_set_gpio_dataout);
EXPORT_SYMBOL(omap_get_gpio_datain);
EXPORT_SYMBOL(omap_set_gpio_edge_ctrl);
arch_initcall(omap_gpio_init);
