/* * Freescale i.MX28 GPIO control code * * Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com> * on behalf of DENX Software Engineering GmbH * * See file CREDITS for list of people who contributed to this * project. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA */ #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 mx28_register_32 *reg = (struct mx28_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 mx28_register_32 *reg = (struct mx28_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 mx28_register_32 *reg = (struct mx28_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 mx28_register_32 *reg = (struct mx28_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; }