bf0970e762
Change-Id: I23bc0191ca8fcd88364e5c08be7c90195019e399 Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr> Reviewed-on: https://review.coreboot.org/c/coreboot/+/32012 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Werner Zeh <werner.zeh@siemens.com> Reviewed-by: David Guckian
217 lines
5.9 KiB
C
217 lines
5.9 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright 2013 Google Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <device/mmio.h>
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#include <gpio.h>
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#include <soc/addressmap.h>
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#include <stddef.h>
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#include <stdint.h>
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#include "pinmux.h"
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static void __gpio_input(gpio_t gpio, u32 pull)
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{
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u32 pinmux_config = PINMUX_INPUT_ENABLE | pull;
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gpio_set_int_enable(gpio, 0);
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gpio_set_out_enable(gpio, 0);
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gpio_set_mode(gpio, GPIO_MODE_GPIO);
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pinmux_set_config(gpio >> GPIO_PINMUX_SHIFT, pinmux_config);
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}
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static void __gpio_output(gpio_t gpio, int value, u32 od)
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{
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gpio_set_int_enable(gpio, 0);
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gpio_set(gpio, value);
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gpio_set_out_enable(gpio, 1);
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gpio_set_mode(gpio, GPIO_MODE_GPIO);
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pinmux_set_config(gpio >> GPIO_PINMUX_SHIFT, PINMUX_PULL_NONE | od);
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}
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static const struct gpio_bank *gpio_banks = (void *)TEGRA_GPIO_BASE;
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static u32 gpio_read_port(int index, size_t offset)
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{
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int bank = index / GPIO_GPIOS_PER_BANK;
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int port = (index - bank * GPIO_GPIOS_PER_BANK) / GPIO_GPIOS_PER_PORT;
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return read32((u8 *)&gpio_banks[bank] + offset +
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port * sizeof(u32));
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}
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static void gpio_write_port(int index, size_t offset, u32 mask, u32 value)
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{
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int bank = index / GPIO_GPIOS_PER_BANK;
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int port = (index - bank * GPIO_GPIOS_PER_BANK) / GPIO_GPIOS_PER_PORT;
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u32 reg = read32((u8 *)&gpio_banks[bank] + offset +
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port * sizeof(u32));
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u32 new_reg = (reg & ~mask) | (value & mask);
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if (new_reg != reg) {
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write32((u8 *)&gpio_banks[bank] + offset + port * sizeof(u32),
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new_reg);
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}
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}
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void gpio_set_mode(gpio_t gpio, enum gpio_mode mode)
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{
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int bit = gpio % GPIO_GPIOS_PER_PORT;
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gpio_write_port(gpio & ((1 << GPIO_PINMUX_SHIFT) - 1),
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offsetof(struct gpio_bank, config),
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1 << bit, mode ? (1 << bit) : 0);
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}
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int gpio_get_mode(gpio_t gpio)
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{
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int bit = gpio % GPIO_GPIOS_PER_PORT;
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u32 port = gpio_read_port(gpio & ((1 << GPIO_PINMUX_SHIFT) - 1),
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offsetof(struct gpio_bank, config));
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return (port & (1 << bit)) != 0;
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}
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void gpio_set_lock(gpio_t gpio)
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{
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int bit = gpio % GPIO_GPIOS_PER_PORT + GPIO_GPIOS_PER_PORT;
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gpio_write_port(gpio & ((1 << GPIO_PINMUX_SHIFT) - 1),
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offsetof(struct gpio_bank, config),
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1 << bit, 1 << bit);
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}
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int gpio_get_lock(gpio_t gpio)
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{
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int bit = gpio % GPIO_GPIOS_PER_PORT + GPIO_GPIOS_PER_PORT;
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u32 port = gpio_read_port(gpio & ((1 << GPIO_PINMUX_SHIFT) - 1),
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offsetof(struct gpio_bank, config));
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return (port & (1 << bit)) != 0;
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}
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void gpio_set_out_enable(gpio_t gpio, int enable)
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{
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int bit = gpio % GPIO_GPIOS_PER_PORT;
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gpio_write_port(gpio & ((1 << GPIO_PINMUX_SHIFT) - 1),
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offsetof(struct gpio_bank, out_enable),
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1 << bit, enable ? (1 << bit) : 0);
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}
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int gpio_get_out_enable(gpio_t gpio)
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{
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int bit = gpio % GPIO_GPIOS_PER_PORT;
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u32 port = gpio_read_port(gpio & ((1 << GPIO_PINMUX_SHIFT) - 1),
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offsetof(struct gpio_bank, out_enable));
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return (port & (1 << bit)) != 0;
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}
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void gpio_set(gpio_t gpio, int value)
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{
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int bit = gpio % GPIO_GPIOS_PER_PORT;
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gpio_write_port(gpio & ((1 << GPIO_PINMUX_SHIFT) - 1),
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offsetof(struct gpio_bank, out_value),
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1 << bit, value ? (1 << bit) : 0);
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}
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int gpio_get_out_value(gpio_t gpio)
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{
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int bit = gpio % GPIO_GPIOS_PER_PORT;
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u32 port = gpio_read_port(gpio & ((1 << GPIO_PINMUX_SHIFT) - 1),
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offsetof(struct gpio_bank, out_value));
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return (port & (1 << bit)) != 0;
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}
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int gpio_get(gpio_t gpio)
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{
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int bit = gpio % GPIO_GPIOS_PER_PORT;
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u32 port = gpio_read_port(gpio & ((1 << GPIO_PINMUX_SHIFT) - 1),
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offsetof(struct gpio_bank, in_value));
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return (port & (1 << bit)) != 0;
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}
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int gpio_get_int_status(gpio_t gpio)
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{
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int bit = gpio % GPIO_GPIOS_PER_PORT;
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u32 port = gpio_read_port(gpio & ((1 << GPIO_PINMUX_SHIFT) - 1),
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offsetof(struct gpio_bank, int_status));
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return (port & (1 << bit)) != 0;
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}
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void gpio_set_int_enable(gpio_t gpio, int enable)
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{
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int bit = gpio % GPIO_GPIOS_PER_PORT;
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gpio_write_port(gpio & ((1 << GPIO_PINMUX_SHIFT) - 1),
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offsetof(struct gpio_bank, int_enable),
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1 << bit, enable ? (1 << bit) : 0);
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}
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int gpio_get_int_enable(gpio_t gpio)
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{
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int bit = gpio % GPIO_GPIOS_PER_PORT;
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u32 port = gpio_read_port(gpio & ((1 << GPIO_PINMUX_SHIFT) - 1),
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offsetof(struct gpio_bank, int_enable));
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return (port & (1 << bit)) != 0;
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}
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void gpio_set_int_level(gpio_t gpio, int high_rise, int edge, int delta)
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{
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int bit = gpio % GPIO_GPIOS_PER_PORT;
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u32 value = (high_rise ? (0x000001 << bit) : 0) |
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(edge ? (0x000100 << bit) : 0) |
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(delta ? (0x010000 << bit) : 0);
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gpio_write_port(gpio & ((1 << GPIO_PINMUX_SHIFT) - 1),
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offsetof(struct gpio_bank, config),
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0x010101 << bit, value);
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}
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void gpio_get_int_level(gpio_t gpio, int *high_rise, int *edge, int *delta)
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{
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int bit = gpio % GPIO_GPIOS_PER_PORT;
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u32 port = gpio_read_port(gpio & ((1 << GPIO_PINMUX_SHIFT) - 1),
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offsetof(struct gpio_bank, int_level));
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*high_rise = ((port & (0x000001 << bit)) != 0);
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*edge = ((port & (0x000100 << bit)) != 0);
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*delta = ((port & (0x010000 << bit)) != 0);
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}
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void gpio_set_int_clear(gpio_t gpio)
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{
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int bit = gpio % GPIO_GPIOS_PER_PORT;
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gpio_write_port(gpio & ((1 << GPIO_PINMUX_SHIFT) - 1),
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offsetof(struct gpio_bank, int_clear),
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1 << bit, 1 << bit);
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}
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void gpio_input_pulldown(gpio_t gpio)
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{
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__gpio_input(gpio, PINMUX_PULL_DOWN);
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}
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void gpio_input_pullup(gpio_t gpio)
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{
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__gpio_input(gpio, PINMUX_PULL_UP);
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}
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void gpio_input(gpio_t gpio)
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{
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__gpio_input(gpio, PINMUX_PULL_NONE);
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}
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void gpio_output(gpio_t gpio, int value)
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{
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__gpio_output(gpio, value, 0);
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}
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void gpio_output_open_drain(gpio_t gpio, int value)
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{
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__gpio_output(gpio, value, PINMUX_OPEN_DRAIN);
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}
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