| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright 2015 MediaTek 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 <assert.h> |
| #include <gpio.h> |
| #include <types.h> |
| |
| enum { |
| MAX_GPIO_NUMBER = 134, |
| }; |
| |
| static void pos_bit_calc(gpio_t gpio, u32 *pos, u32 *bit) |
| { |
| *pos = gpio.id / MAX_GPIO_REG_BITS; |
| *bit = gpio.id % MAX_GPIO_REG_BITS; |
| } |
| |
| void gpio_set_pull(gpio_t gpio, enum pull_enable enable, |
| enum pull_select select) |
| { |
| u32 pos; |
| u32 bit; |
| u32 *en_reg, *sel_reg; |
| u32 pin = gpio.id; |
| |
| pos_bit_calc(gpio, &pos, &bit); |
| |
| if (enable == GPIO_PULL_DISABLE) { |
| en_reg = &mtk_gpio->pullen[pos].rst; |
| } else { |
| /* These pins' pulls can't be set through GPIO controller. */ |
| assert(pin < 22 || pin > 27); |
| assert(pin < 47 || pin > 56); |
| assert(pin < 57 || pin > 68); |
| assert(pin < 73 || pin > 78); |
| assert(pin < 100 || pin > 105); |
| assert(pin < 119 || pin > 124); |
| |
| en_reg = &mtk_gpio->pullen[pos].set; |
| sel_reg = (select == GPIO_PULL_DOWN) ? |
| (&mtk_gpio->pullsel[pos].rst) : |
| (&mtk_gpio->pullsel[pos].set); |
| write16(sel_reg, 1L << bit); |
| } |
| write16(en_reg, 1L << bit); |
| } |