mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-14 17:07:38 +00:00
1a4596601f
Signed-off-by: Wolfgang Denk <wd@denx.de> [trini: Fixup common/cmd_io.c] Signed-off-by: Tom Rini <trini@ti.com>
116 lines
2.8 KiB
C
116 lines
2.8 KiB
C
/*
|
|
* Freescale i.MX28 GPIO control code
|
|
*
|
|
* Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
|
|
* on behalf of DENX Software Engineering GmbH
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <netdev.h>
|
|
#include <asm/errno.h>
|
|
#include <asm/io.h>
|
|
#include <asm/arch/iomux.h>
|
|
#include <asm/arch/imx-regs.h>
|
|
|
|
#if defined(CONFIG_MX23)
|
|
#define PINCTRL_BANKS 3
|
|
#define PINCTRL_DOUT(n) (0x0500 + ((n) * 0x10))
|
|
#define PINCTRL_DIN(n) (0x0600 + ((n) * 0x10))
|
|
#define PINCTRL_DOE(n) (0x0700 + ((n) * 0x10))
|
|
#define PINCTRL_PIN2IRQ(n) (0x0800 + ((n) * 0x10))
|
|
#define PINCTRL_IRQEN(n) (0x0900 + ((n) * 0x10))
|
|
#define PINCTRL_IRQSTAT(n) (0x0c00 + ((n) * 0x10))
|
|
#elif defined(CONFIG_MX28)
|
|
#define PINCTRL_BANKS 5
|
|
#define PINCTRL_DOUT(n) (0x0700 + ((n) * 0x10))
|
|
#define PINCTRL_DIN(n) (0x0900 + ((n) * 0x10))
|
|
#define PINCTRL_DOE(n) (0x0b00 + ((n) * 0x10))
|
|
#define PINCTRL_PIN2IRQ(n) (0x1000 + ((n) * 0x10))
|
|
#define PINCTRL_IRQEN(n) (0x1100 + ((n) * 0x10))
|
|
#define PINCTRL_IRQSTAT(n) (0x1400 + ((n) * 0x10))
|
|
#else
|
|
#error "Please select CONFIG_MX23 or CONFIG_MX28"
|
|
#endif
|
|
|
|
#define GPIO_INT_FALL_EDGE 0x0
|
|
#define GPIO_INT_LOW_LEV 0x1
|
|
#define GPIO_INT_RISE_EDGE 0x2
|
|
#define GPIO_INT_HIGH_LEV 0x3
|
|
#define GPIO_INT_LEV_MASK (1 << 0)
|
|
#define GPIO_INT_POL_MASK (1 << 1)
|
|
|
|
void mxs_gpio_init(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < PINCTRL_BANKS; i++) {
|
|
writel(0, MXS_PINCTRL_BASE + PINCTRL_PIN2IRQ(i));
|
|
writel(0, MXS_PINCTRL_BASE + PINCTRL_IRQEN(i));
|
|
/* Use SCT address here to clear the IRQSTAT bits */
|
|
writel(0xffffffff, MXS_PINCTRL_BASE + PINCTRL_IRQSTAT(i) + 8);
|
|
}
|
|
}
|
|
|
|
int gpio_get_value(unsigned gpio)
|
|
{
|
|
uint32_t bank = PAD_BANK(gpio);
|
|
uint32_t offset = PINCTRL_DIN(bank);
|
|
struct mxs_register_32 *reg =
|
|
(struct mxs_register_32 *)(MXS_PINCTRL_BASE + offset);
|
|
|
|
return (readl(®->reg) >> PAD_PIN(gpio)) & 1;
|
|
}
|
|
|
|
void gpio_set_value(unsigned gpio, int value)
|
|
{
|
|
uint32_t bank = PAD_BANK(gpio);
|
|
uint32_t offset = PINCTRL_DOUT(bank);
|
|
struct mxs_register_32 *reg =
|
|
(struct mxs_register_32 *)(MXS_PINCTRL_BASE + offset);
|
|
|
|
if (value)
|
|
writel(1 << PAD_PIN(gpio), ®->reg_set);
|
|
else
|
|
writel(1 << PAD_PIN(gpio), ®->reg_clr);
|
|
}
|
|
|
|
int gpio_direction_input(unsigned gpio)
|
|
{
|
|
uint32_t bank = PAD_BANK(gpio);
|
|
uint32_t offset = PINCTRL_DOE(bank);
|
|
struct mxs_register_32 *reg =
|
|
(struct mxs_register_32 *)(MXS_PINCTRL_BASE + offset);
|
|
|
|
writel(1 << PAD_PIN(gpio), ®->reg_clr);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int gpio_direction_output(unsigned gpio, int value)
|
|
{
|
|
uint32_t bank = PAD_BANK(gpio);
|
|
uint32_t offset = PINCTRL_DOE(bank);
|
|
struct mxs_register_32 *reg =
|
|
(struct mxs_register_32 *)(MXS_PINCTRL_BASE + offset);
|
|
|
|
writel(1 << PAD_PIN(gpio), ®->reg_set);
|
|
|
|
gpio_set_value(gpio, value);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int gpio_request(unsigned gpio, const char *label)
|
|
{
|
|
if (PAD_BANK(gpio) >= PINCTRL_BANKS)
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int gpio_free(unsigned gpio)
|
|
{
|
|
return 0;
|
|
}
|