| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright 2018 Qualcomm Inc. |
| * |
| * 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; version 2 of the License. |
| * |
| * 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. |
| */ |
| |
| #include <device/mmio.h> |
| #include <types.h> |
| #include <delay.h> |
| #include <gpio.h> |
| |
| void gpio_configure(gpio_t gpio, uint32_t func, uint32_t pull, |
| uint32_t drive_str, uint32_t enable) |
| { |
| uint32_t reg_val; |
| struct tlmm_gpio *regs = (void *)(uintptr_t)gpio.addr; |
| |
| reg_val = ((enable & GPIO_CFG_OE_BMSK) << GPIO_CFG_OE_SHFT) | |
| ((drive_str & GPIO_CFG_DRV_BMSK) << GPIO_CFG_DRV_SHFT) | |
| ((func & GPIO_CFG_FUNC_BMSK) << GPIO_CFG_FUNC_SHFT) | |
| ((pull & GPIO_CFG_PULL_BMSK) << GPIO_CFG_PULL_SHFT); |
| |
| write32(®s->cfg, reg_val); |
| } |
| |
| void gpio_set(gpio_t gpio, int value) |
| { |
| struct tlmm_gpio *regs = (void *)(uintptr_t)gpio.addr; |
| write32(®s->in_out, (!!value) << GPIO_IO_OUT_SHFT); |
| } |
| |
| int gpio_get(gpio_t gpio) |
| { |
| struct tlmm_gpio *regs = (void *)(uintptr_t)gpio.addr; |
| |
| return ((read32(®s->in_out) >> GPIO_IO_IN_SHFT) & |
| GPIO_IO_IN_BMSK); |
| } |
| |
| void gpio_input_pulldown(gpio_t gpio) |
| { |
| gpio_configure(gpio, GPIO_FUNC_DISABLE, |
| GPIO_PULL_DOWN, GPIO_2MA, GPIO_DISABLE); |
| } |
| |
| void gpio_input_pullup(gpio_t gpio) |
| { |
| gpio_configure(gpio, GPIO_FUNC_DISABLE, |
| GPIO_PULL_UP, GPIO_2MA, GPIO_DISABLE); |
| } |
| |
| void gpio_input(gpio_t gpio) |
| { |
| gpio_configure(gpio, GPIO_FUNC_DISABLE, |
| GPIO_NO_PULL, GPIO_2MA, GPIO_DISABLE); |
| } |
| |
| void gpio_output(gpio_t gpio, int value) |
| { |
| gpio_set(gpio, value); |
| gpio_configure(gpio, GPIO_FUNC_DISABLE, |
| GPIO_NO_PULL, GPIO_2MA, GPIO_ENABLE); |
| } |