/* SPDX-License-Identifier: BSD-3-Clause */ #include <device/mmio.h> #include <gpio.h> #include <soc/iomap.h> /******************************************************* Function description: check for invalid GPIO # Arguments : gpio_t gpio - Gpio number Return : GPIO Valid(0)/Invalid(1) *******************************************************/ static inline int gpio_not_valid(gpio_t gpio) { return (gpio > GPIO_MAX_NUM); } /******************************************************* Function description: configure GPIO functionality Arguments : gpio_t gpio - Gpio number unsigned func - Functionality number unsigned pull - pull up/down, no pull range(0-3) unsigned drvstr - range (0 - 7)-> (2- 16)MA steps of 2 unsigned enable - 0 Disable, 1 - Enable. Return : None *******************************************************/ void gpio_tlmm_config_set(gpio_t gpio, unsigned int func, unsigned int pull, unsigned int drvstr, unsigned int enable) { unsigned int val = 0; if (gpio_not_valid(gpio)) return; val |= (pull & GPIO_CFG_PULL_MASK) << GPIO_CFG_PULL_SHIFT; val |= (func & GPIO_CFG_FUNC_MASK) << GPIO_CFG_FUNC_SHIFT; val |= (drvstr & GPIO_CFG_DRV_MASK) << GPIO_CFG_DRV_SHIFT; val |= (enable & GPIO_CFG_OE_MASK) << GPIO_CFG_OE_SHIFT; write32(GPIO_CONFIG_ADDR(gpio), val); } /******************************************************* Function description: Get GPIO configuration Arguments : gpio_t gpio - Gpio number unsigned *func - Functionality number unsigned *pull - pull up/down, no pull range(0-3) unsigned *drvstr - range (0 - 7)-> (2- 16)MA steps of 2 unsigned *enable - 0 - Disable, 1- Enable. Return : None *******************************************************/ void gpio_tlmm_config_get(gpio_t gpio, unsigned int *func, unsigned int *pull, unsigned int *drvstr, unsigned int *enable) { unsigned int val; void *addr = GPIO_CONFIG_ADDR(gpio); if (gpio_not_valid(gpio)) return; val = read32(addr); *pull = (val >> GPIO_CFG_PULL_SHIFT) & GPIO_CFG_PULL_MASK; *func = (val >> GPIO_CFG_FUNC_SHIFT) & GPIO_CFG_FUNC_MASK; *drvstr = (val >> GPIO_CFG_DRV_SHIFT) & GPIO_CFG_DRV_MASK; *enable = (val >> GPIO_CFG_OE_SHIFT) & GPIO_CFG_OE_MASK; } /******************************************************* Function description: get GPIO IO functionality details Arguments : gpio_t gpio - Gpio number unsigned *in - Value of GPIO input unsigned *out - Value of GPIO output Return : None *******************************************************/ int gpio_get(gpio_t gpio) { if (gpio_not_valid(gpio)) return -1; return (read32(GPIO_IN_OUT_ADDR(gpio)) >> GPIO_IO_IN_SHIFT) & GPIO_IO_IN_MASK; } void gpio_set(gpio_t gpio, int value) { if (gpio_not_valid(gpio)) return; write32(GPIO_IN_OUT_ADDR(gpio), (value & 1) << GPIO_IO_OUT_SHIFT); } void gpio_input_pulldown(gpio_t gpio) { gpio_tlmm_config_set(gpio, GPIO_FUNC_DISABLE, GPIO_PULL_DOWN, GPIO_2MA, GPIO_DISABLE); } void gpio_input_pullup(gpio_t gpio) { gpio_tlmm_config_set(gpio, GPIO_FUNC_DISABLE, GPIO_PULL_UP, GPIO_2MA, GPIO_DISABLE); } void gpio_input(gpio_t gpio) { gpio_tlmm_config_set(gpio, GPIO_FUNC_DISABLE, GPIO_NO_PULL, GPIO_2MA, GPIO_DISABLE); }