Signed-off-by: Marek Vasut <marek.va...@gmail.com> Cc: Stefano Babic <sba...@denx.de> Cc: Wolfgang Denk <w...@denx.de> Cc: Detlev Zundel <d...@denx.de> --- arch/arm/cpu/arm926ejs/mx28/Makefile | 2 +- arch/arm/cpu/arm926ejs/mx28/gpio.c | 108 +++++++++++++++++++++++++++++++++ arch/arm/cpu/arm926ejs/mx28/mx28.c | 10 +++ arch/arm/include/asm/arch-mx28/gpio.h | 32 ++++++++++ 4 files changed, 151 insertions(+), 1 deletions(-) create mode 100644 arch/arm/cpu/arm926ejs/mx28/gpio.c create mode 100644 arch/arm/include/asm/arch-mx28/gpio.h
diff --git a/arch/arm/cpu/arm926ejs/mx28/Makefile b/arch/arm/cpu/arm926ejs/mx28/Makefile index 7845310..e3f0a12 100644 --- a/arch/arm/cpu/arm926ejs/mx28/Makefile +++ b/arch/arm/cpu/arm926ejs/mx28/Makefile @@ -25,7 +25,7 @@ include $(TOPDIR)/config.mk LIB = $(obj)lib$(SOC).o -COBJS = clock.o mx28.o iomux.o timer.o +COBJS = clock.o mx28.o gpio.o iomux.o timer.o SRCS := $(START:.o=.S) $(COBJS:.o=.c) OBJS := $(addprefix $(obj),$(COBJS)) diff --git a/arch/arm/cpu/arm926ejs/mx28/gpio.c b/arch/arm/cpu/arm926ejs/mx28/gpio.c new file mode 100644 index 0000000..00d2cca --- /dev/null +++ b/arch/arm/cpu/arm926ejs/mx28/gpio.c @@ -0,0 +1,108 @@ +/* + * Freescale i.MX28 GPIO control code + * + * Copyright (C) 2011 Marek Vasut <marek.va...@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/clock.h> +#include <asm/arch/regs-common.h> +#include <asm/arch/regs-base.h> +#include <asm/arch/iomux.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_direction(iomux_cfg_t pad, int output) +{ + uint32_t bank = PAD_BANK(pad); + uint32_t offset = PINCTRL_DOE(bank); + struct mx28_register *reg = + (struct mx28_register *)(MXS_PINCTRL_BASE + offset); + + if (output) + writel(1 << PAD_PIN(pad), ®->reg_set); + else + writel(1 << PAD_PIN(pad), ®->reg_clr); +} + +int mxs_gpio_get(iomux_cfg_t pad) +{ + uint32_t bank = PAD_BANK(pad); + uint32_t offset = PINCTRL_DIN(bank); + struct mx28_register *reg = + (struct mx28_register *)(MXS_PINCTRL_BASE + offset); + + return (readl(®->reg) >> PAD_PIN(pad)) & 1; +} + +void mxs_gpio_set(iomux_cfg_t pad, int value) +{ + uint32_t bank = PAD_BANK(pad); + uint32_t offset = PINCTRL_DOUT(bank); + struct mx28_register *reg = + (struct mx28_register *)(MXS_PINCTRL_BASE + offset); + + if (value) + writel(1 << PAD_PIN(pad), ®->reg_set); + else + writel(1 << PAD_PIN(pad), ®->reg_clr); +} + +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); + } +} diff --git a/arch/arm/cpu/arm926ejs/mx28/mx28.c b/arch/arm/cpu/arm926ejs/mx28/mx28.c index dca54d2..68f0da3 100644 --- a/arch/arm/cpu/arm926ejs/mx28/mx28.c +++ b/arch/arm/cpu/arm926ejs/mx28/mx28.c @@ -30,6 +30,8 @@ #include <asm/errno.h> #include <asm/io.h> #include <asm/arch/clock.h> +#include <asm/arch/iomux.h> +#include <asm/arch/gpio.h> #include <asm/arch/regs-common.h> #include <asm/arch/regs-base.h> #include <asm/arch/regs-clkctrl.h> @@ -118,6 +120,14 @@ int mx28_reset_block(struct mx28_register *reg) return 0; } +#ifdef CONFIG_ARCH_CPU_INIT +int arch_cpu_init(void) +{ + mxs_gpio_init(); + return 0; +} +#endif + #if defined(CONFIG_DISPLAY_CPUINFO) int print_cpuinfo(void) { diff --git a/arch/arm/include/asm/arch-mx28/gpio.h b/arch/arm/include/asm/arch-mx28/gpio.h new file mode 100644 index 0000000..9435538 --- /dev/null +++ b/arch/arm/include/asm/arch-mx28/gpio.h @@ -0,0 +1,32 @@ +/* + * Freescale i.MX28 GPIO + * + * Copyright (C) 2011 Marek Vasut <marek.va...@gmail.com> + * on behalf of DENX Software Engineering GmbH + * + * 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 + * + */ + +#ifndef __GPIO_H__ +#define __GPIO_H__ + +void mxs_gpio_set(iomux_cfg_t pad, int value); +int mxs_gpio_get(iomux_cfg_t pad); +void mxs_gpio_direction(iomux_cfg_t pad, int output); + +void mxs_gpio_init(void); + +#endif /* __GPIO_H__ */ -- 1.7.5.4 _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot