| /* 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); |
| } |