diff options
Diffstat (limited to 'plat/mediatek/drivers/gpio/mtgpio_common.c')
| -rw-r--r-- | plat/mediatek/drivers/gpio/mtgpio_common.c | 302 |
1 files changed, 302 insertions, 0 deletions
diff --git a/plat/mediatek/drivers/gpio/mtgpio_common.c b/plat/mediatek/drivers/gpio/mtgpio_common.c new file mode 100644 index 0000000..bad0190 --- /dev/null +++ b/plat/mediatek/drivers/gpio/mtgpio_common.c @@ -0,0 +1,302 @@ +/* + * Copyright (c) 2020-2022, MediaTek Inc. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <assert.h> +#include <common/debug.h> +#include <drivers/delay_timer.h> +#include <drivers/gpio.h> +#include <lib/mmio.h> +#include <lib/mtk_init/mtk_init.h> +#include <mtgpio.h> +#include <platform_def.h> + +/****************************************************************************** + *Macro Definition + ******************************************************************************/ +#define GPIO_MODE_BITS 4 +#define MAX_GPIO_MODE_PER_REG 8 +#define MAX_GPIO_REG_BITS 32 +#define DIR_BASE (GPIO_BASE + 0x000) +#define DOUT_BASE (GPIO_BASE + 0x100) +#define DIN_BASE (GPIO_BASE + 0x200) +#define MODE_BASE (GPIO_BASE + 0x300) +#define SET 0x4 +#define CLR 0x8 + +static void mt_set_gpio_dir_chip(uint32_t pin, int dir) +{ + uint32_t pos, bit; + + assert(pin < MAX_GPIO_PIN); + assert(dir < MT_GPIO_DIR_MAX); + + pos = pin / MAX_GPIO_REG_BITS; + bit = pin % MAX_GPIO_REG_BITS; + + if (dir == MT_GPIO_DIR_IN) { + mmio_write_32(DIR_BASE + 0x10U * pos + CLR, 1U << bit); + } else { + mmio_write_32(DIR_BASE + 0x10U * pos + SET, 1U << bit); + } +} + +static int mt_get_gpio_dir_chip(uint32_t pin) +{ + uint32_t pos, bit; + uint32_t reg; + + assert(pin < MAX_GPIO_PIN); + + pos = pin / MAX_GPIO_REG_BITS; + bit = pin % MAX_GPIO_REG_BITS; + + reg = mmio_read_32(DIR_BASE + 0x10U * pos); + return (((reg & (1U << bit)) != 0U) ? MT_GPIO_DIR_OUT : MT_GPIO_DIR_IN); +} + +static void mt_set_gpio_out_chip(uint32_t pin, int output) +{ + uint32_t pos, bit; + + assert(pin < MAX_GPIO_PIN); + assert(output < MT_GPIO_OUT_MAX); + + pos = pin / MAX_GPIO_REG_BITS; + bit = pin % MAX_GPIO_REG_BITS; + + if (output == MT_GPIO_OUT_ZERO) { + mmio_write_32(DOUT_BASE + 0x10U * pos + CLR, 1U << bit); + } else { + mmio_write_32(DOUT_BASE + 0x10U * pos + SET, 1U << bit); + } +} + +static int mt_get_gpio_in_chip(uint32_t pin) +{ + uint32_t pos, bit; + uint32_t reg; + + assert(pin < MAX_GPIO_PIN); + + pos = pin / MAX_GPIO_REG_BITS; + bit = pin % MAX_GPIO_REG_BITS; + + reg = mmio_read_32(DIN_BASE + 0x10U * pos); + return (((reg & (1U << bit)) != 0U) ? 1 : 0); +} + +static void mt_gpio_set_spec_pull_pupd(uint32_t pin, int enable, + int select) +{ + uintptr_t reg1; + uintptr_t reg2; + struct mt_pin_info gpio_info; + + gpio_info = mt_pin_infos[pin]; + uint32_t bit = gpio_info.bit; + + reg1 = mt_gpio_find_reg_addr(pin) + gpio_info.offset; + reg2 = reg1 + (gpio_info.base & 0xf0); + if (enable == MT_GPIO_PULL_ENABLE) { + mmio_write_32(reg2 + SET, (1U << bit)); + if (select == MT_GPIO_PULL_DOWN) { + mmio_write_32(reg1 + SET, (1U << bit)); + } else { + mmio_write_32(reg1 + CLR, (1U << bit)); + } + } else { + mmio_write_32(reg2 + CLR, (1U << bit)); + mmio_write_32((reg2 + 0x010U) + CLR, (1U << bit)); + } +} + +static void mt_gpio_set_pull_pu_pd(uint32_t pin, int enable, + int select) +{ + uintptr_t reg1; + uintptr_t reg2; + struct mt_pin_info gpio_info; + + gpio_info = mt_pin_infos[pin]; + uint32_t bit = gpio_info.bit; + + reg1 = mt_gpio_find_reg_addr(pin) + gpio_info.offset; + reg2 = reg1 - (gpio_info.base & 0xf0); + + if (enable == MT_GPIO_PULL_ENABLE) { + if (select == MT_GPIO_PULL_DOWN) { + mmio_write_32(reg1 + CLR, (1U << bit)); + mmio_write_32(reg2 + SET, (1U << bit)); + } else { + mmio_write_32(reg2 + CLR, (1U << bit)); + mmio_write_32(reg1 + SET, (1U << bit)); + } + } else { + mmio_write_32(reg1 + CLR, (1U << bit)); + mmio_write_32(reg2 + CLR, (1U << bit)); + } +} + +static void mt_gpio_set_pull_chip(uint32_t pin, int enable, + int select) +{ + struct mt_pin_info gpio_info; + + gpio_info = mt_pin_infos[pin]; + if (gpio_info.flag) { + mt_gpio_set_spec_pull_pupd(pin, enable, select); + } else { + mt_gpio_set_pull_pu_pd(pin, enable, select); + } +} + +static int mt_gpio_get_spec_pull_pupd(uint32_t pin) +{ + uintptr_t reg1; + uintptr_t reg2; + uint32_t r0; + uint32_t r1; + + struct mt_pin_info gpio_info; + + gpio_info = mt_pin_infos[pin]; + uint32_t bit = gpio_info.bit; + + reg1 = mt_gpio_find_reg_addr(pin) + gpio_info.offset; + reg2 = reg1 + (gpio_info.base & 0xf0); + + r0 = (mmio_read_32(reg2) >> bit) & 1U; + r1 = (mmio_read_32(reg2 + 0x010) >> bit) & 1U; + if (r0 == 0U && r1 == 0U) { + return MT_GPIO_PULL_NONE; + } else { + if (mmio_read_32(reg1) & (1U << bit)) { + return MT_GPIO_PULL_DOWN; + } else { + return MT_GPIO_PULL_UP; + } + } +} + +static int mt_gpio_get_pull_pu_pd(uint32_t pin) +{ + uintptr_t reg1; + uintptr_t reg2; + uint32_t pu; + uint32_t pd; + + struct mt_pin_info gpio_info; + + gpio_info = mt_pin_infos[pin]; + uint32_t bit = gpio_info.bit; + + reg1 = mt_gpio_find_reg_addr(pin) + gpio_info.offset; + reg2 = reg1 - (gpio_info.base & 0xf0); + pu = (mmio_read_32(reg1) >> bit) & 1U; + pd = (mmio_read_32(reg2) >> bit) & 1U; + if (pu == 1U) { + return MT_GPIO_PULL_UP; + } else if (pd == 1U) { + return MT_GPIO_PULL_DOWN; + } else { + return MT_GPIO_PULL_NONE; + } +} + +static int mt_gpio_get_pull_chip(uint32_t pin) +{ + struct mt_pin_info gpio_info; + + gpio_info = mt_pin_infos[pin]; + if (gpio_info.flag) { + return mt_gpio_get_spec_pull_pupd(pin); + } else { + return mt_gpio_get_pull_pu_pd(pin); + } +} + +static void mt_set_gpio_pull_select_chip(uint32_t pin, int sel) +{ + assert(pin < MAX_GPIO_PIN); + + if (sel == MT_GPIO_PULL_NONE) { + mt_gpio_set_pull_chip(pin, MT_GPIO_PULL_DISABLE, MT_GPIO_PULL_DOWN); + } else if (sel == MT_GPIO_PULL_UP) { + mt_gpio_set_pull_chip(pin, MT_GPIO_PULL_ENABLE, MT_GPIO_PULL_UP); + } else if (sel == MT_GPIO_PULL_DOWN) { + mt_gpio_set_pull_chip(pin, MT_GPIO_PULL_ENABLE, MT_GPIO_PULL_DOWN); + } +} + +/* get pull-up or pull-down, regardless of resistor value */ +static int mt_get_gpio_pull_select_chip(uint32_t pin) +{ + assert(pin < MAX_GPIO_PIN); + + return mt_gpio_get_pull_chip(pin); +} + +static void mt_set_gpio_dir(int gpio, int direction) +{ + mt_set_gpio_dir_chip((uint32_t)gpio, direction); +} + +static int mt_get_gpio_dir(int gpio) +{ + uint32_t pin; + + pin = (uint32_t)gpio; + return mt_get_gpio_dir_chip(pin); +} + +static void mt_set_gpio_pull(int gpio, int pull) +{ + uint32_t pin; + + pin = (uint32_t)gpio; + mt_set_gpio_pull_select_chip(pin, pull); +} + +static int mt_get_gpio_pull(int gpio) +{ + uint32_t pin; + + pin = (uint32_t)gpio; + return mt_get_gpio_pull_select_chip(pin); +} + +static void mt_set_gpio_out(int gpio, int value) +{ + uint32_t pin; + + pin = (uint32_t)gpio; + mt_set_gpio_out_chip(pin, value); +} + +static int mt_get_gpio_in(int gpio) +{ + uint32_t pin; + + pin = (uint32_t)gpio; + return mt_get_gpio_in_chip(pin); +} + +const gpio_ops_t mtgpio_ops = { + .get_direction = mt_get_gpio_dir, + .set_direction = mt_set_gpio_dir, + .get_value = mt_get_gpio_in, + .set_value = mt_set_gpio_out, + .set_pull = mt_set_gpio_pull, + .get_pull = mt_get_gpio_pull, +}; + +int mt_gpio_init(void) +{ + gpio_init(&mtgpio_ops); + + return 0; +} +MTK_PLAT_SETUP_0_INIT(mt_gpio_init); |