2020-05-25 17:30:05 +08:00
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/*
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* Copyright (c) 2006-2020, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2020-04-16 bigmagic first version
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2020-06-16 09:16:07 +08:00
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* 2020-06-16 bigmagic add gpio irq
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2020-05-25 17:30:05 +08:00
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*/
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#include "drv_gpio.h"
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#ifdef BSP_USING_PIN
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2020-06-16 09:16:07 +08:00
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/*
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* gpio_int[0] for BANK0 (pins 0-27)
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* gpio_int[1] for BANK1 (pins 28-45)
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* gpio_int[2] for BANK2 (pins 46-53)
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*/
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static struct gpio_irq_def _g_gpio_irq_tbl[GPIO_IRQ_NUM];
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uint32_t raspi_get_pin_state(uint32_t fselnum)
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2020-05-25 17:30:05 +08:00
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{
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uint32_t gpfsel = 0;
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2020-06-16 09:16:07 +08:00
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2020-05-26 13:34:02 +08:00
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switch (fselnum)
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{
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case 0:
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gpfsel = GPIO_REG_GPFSEL0(GPIO_BASE);
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break;
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case 1:
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gpfsel = GPIO_REG_GPFSEL1(GPIO_BASE);
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break;
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case 2:
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gpfsel = GPIO_REG_GPFSEL2(GPIO_BASE);
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break;
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case 3:
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gpfsel = GPIO_REG_GPFSEL3(GPIO_BASE);
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break;
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case 4:
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gpfsel = GPIO_REG_GPFSEL4(GPIO_BASE);
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break;
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case 5:
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gpfsel = GPIO_REG_GPFSEL5(GPIO_BASE);
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break;
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default:
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break;
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}
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2020-06-16 09:16:07 +08:00
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return gpfsel;
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}
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2020-05-26 13:34:02 +08:00
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2020-06-16 09:16:07 +08:00
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void raspi_set_pin_state(uint32_t fselnum, uint32_t gpfsel)
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{
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2020-05-25 17:30:05 +08:00
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switch (fselnum)
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{
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case 0:
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GPIO_REG_GPFSEL0(GPIO_BASE) = gpfsel;
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break;
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case 1:
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GPIO_REG_GPFSEL1(GPIO_BASE) = gpfsel;
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break;
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case 2:
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GPIO_REG_GPFSEL2(GPIO_BASE) = gpfsel;
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break;
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case 3:
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GPIO_REG_GPFSEL3(GPIO_BASE) = gpfsel;
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break;
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case 4:
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GPIO_REG_GPFSEL4(GPIO_BASE) = gpfsel;
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break;
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case 5:
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GPIO_REG_GPFSEL5(GPIO_BASE) = gpfsel;
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break;
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default:
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break;
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}
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}
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2020-06-16 09:16:07 +08:00
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static void gpio_set_pud(GPIO_PIN pin, GPIO_PUPD_FUNC mode)
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{
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uint32_t fselnum = pin / 16;
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uint32_t fselrest = pin % 16;
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uint32_t reg_value = 0;
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switch (fselnum)
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{
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case 0:
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reg_value = GPIO_PUP_PDN_CNTRL_REG0(GPIO_BASE);
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GPIO_PUP_PDN_CNTRL_REG0(GPIO_BASE) = (reg_value | (mode << (fselrest*2)));
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break;
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case 1:
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reg_value = GPIO_PUP_PDN_CNTRL_REG1(GPIO_BASE);
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GPIO_PUP_PDN_CNTRL_REG1(GPIO_BASE) = (reg_value | (mode << (fselrest*2)));
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break;
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case 2:
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reg_value = GPIO_PUP_PDN_CNTRL_REG2(GPIO_BASE);
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GPIO_PUP_PDN_CNTRL_REG2(GPIO_BASE) = (reg_value | (mode << (fselrest*2)));
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break;
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case 3:
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reg_value = GPIO_PUP_PDN_CNTRL_REG3(GPIO_BASE);
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GPIO_PUP_PDN_CNTRL_REG3(GPIO_BASE) = (reg_value | (mode << (fselrest*2)));
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break;
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default:
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break;
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}
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}
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void prev_raspi_pin_mode(GPIO_PIN pin, GPIO_FUNC mode)
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{
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uint32_t fselnum = pin / 10;
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uint32_t fselrest = pin % 10;
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uint32_t gpfsel = 0;
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gpfsel = raspi_get_pin_state(fselnum);
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gpfsel &= ~((uint32_t)(0x07 << (fselrest * 3)));
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gpfsel |= (uint32_t)(mode << (fselrest * 3));
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raspi_set_pin_state(fselnum, gpfsel);
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}
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2020-07-04 22:32:02 +08:00
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void prev_raspi_pin_write(GPIO_PIN pin, int pin_value)
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{
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uint32_t num = pin / 32;
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if(num == 0)
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{
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if(pin_value == 1)
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{
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GPIO_REG_GPSET0(GPIO_BASE) = 1 << (pin % 32);
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}
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else
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{
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GPIO_REG_GPCLR0(GPIO_BASE) = 1 << (pin % 32);
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}
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}
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else
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{
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if(pin_value == 1)
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{
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GPIO_REG_GPSET1(GPIO_BASE) = 1 << (pin % 32);
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}
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else
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{
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GPIO_REG_GPCLR1(GPIO_BASE) = 1 << (pin % 32);
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}
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}
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}
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2020-05-26 13:34:02 +08:00
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static void raspi_pin_mode(struct rt_device *dev, rt_base_t pin, rt_base_t mode)
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{
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2020-06-16 09:16:07 +08:00
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GPIO_FUNC raspi_mode = OUTPUT;
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switch (mode)
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{
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case PIN_MODE_OUTPUT:
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raspi_mode = OUTPUT;
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break;
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case PIN_MODE_INPUT:
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raspi_mode = INPUT;
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break;
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case PIN_MODE_INPUT_PULLUP:
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gpio_set_pud(pin, RASPI_PULL_UP);
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raspi_mode = INPUT;
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break;
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case PIN_MODE_INPUT_PULLDOWN:
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gpio_set_pud(pin, RASPI_PULL_DOWN);
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raspi_mode = INPUT;
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break;
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case PIN_MODE_OUTPUT_OD:
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raspi_mode = OUTPUT;
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break;
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}
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prev_raspi_pin_mode((GPIO_PIN)pin, raspi_mode);
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2020-05-26 13:34:02 +08:00
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}
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2020-05-25 17:30:05 +08:00
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static void raspi_pin_write(struct rt_device *dev, rt_base_t pin, rt_base_t value)
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{
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2020-07-04 22:32:02 +08:00
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prev_raspi_pin_write(pin, value);
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2020-05-25 17:30:05 +08:00
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}
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static int raspi_pin_read(struct rt_device *device, rt_base_t pin)
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{
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2020-06-16 09:16:07 +08:00
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uint32_t num = pin / 32;
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uint32_t pin_level = 0;
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if(num == 0)
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{
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if(GPIO_REG_GPLEV0(GPIO_BASE) & (1 << pin))
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{
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pin_level = 1;
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}
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else
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{
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pin_level = 0;
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}
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}
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else
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{
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if(GPIO_REG_GPLEV1(GPIO_BASE) & (1 << pin))
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{
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pin_level = 1;
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}
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else
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{
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pin_level = 0;
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}
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}
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return pin_level;
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2020-05-25 17:30:05 +08:00
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}
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static rt_err_t raspi_pin_attach_irq(struct rt_device *device, rt_int32_t pin, rt_uint32_t mode, void (*hdr)(void *args), void *args)
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{
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2020-06-16 09:16:07 +08:00
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rt_uint8_t index;
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rt_uint32_t reg_value;
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if (pin <= 27)
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index = 0;
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else if (pin <= 45)
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index = 1;
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else
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index = 2;
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_g_gpio_irq_tbl[index].irq_cb[pin] = hdr;
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_g_gpio_irq_tbl[index].irq_arg[pin] = args;
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_g_gpio_irq_tbl[index].irq_type[pin] = mode;
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rt_uint8_t shift = pin % 32;
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rt_uint8_t pin_num = pin / 32;
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rt_uint32_t mask = 1 << shift;
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switch (mode)
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{
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case PIN_IRQ_MODE_RISING:
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if(pin_num == 0)
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{
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reg_value = GPIO_REG_GPREN0(GPIO_BASE);
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GPIO_REG_GPREN0(GPIO_BASE) = (reg_value & ~ mask) | (mask);
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}
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else
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{
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reg_value = GPIO_REG_GPREN1(GPIO_BASE);
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GPIO_REG_GPREN1(GPIO_BASE) = (reg_value & ~ mask) | (mask);
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}
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break;
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case PIN_IRQ_MODE_FALLING:
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if(pin_num == 0)
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{
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reg_value = GPIO_REG_GPFEN0(GPIO_BASE);
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GPIO_REG_GPFEN0(GPIO_BASE) = (reg_value & ~ mask) | (mask);
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}
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else
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{
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reg_value = GPIO_REG_GPFEN1(GPIO_BASE);
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GPIO_REG_GPFEN1(GPIO_BASE) = (reg_value & ~ mask) | (mask);
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}
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break;
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case PIN_IRQ_MODE_RISING_FALLING:
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if(pin_num == 0)
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{
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reg_value = GPIO_REG_GPAREN0(GPIO_BASE);
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GPIO_REG_GPAREN0(GPIO_BASE) = (reg_value & ~ mask) | (mask);
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reg_value = GPIO_REG_GPFEN0(GPIO_BASE);
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GPIO_REG_GPFEN0(GPIO_BASE) = (reg_value & ~ mask) | (mask);
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}
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else
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{
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reg_value = GPIO_REG_GPAREN1(GPIO_BASE);
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GPIO_REG_GPAREN1(GPIO_BASE) = (reg_value & ~ mask) | (mask);
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reg_value = GPIO_REG_GPFEN1(GPIO_BASE);
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GPIO_REG_GPFEN1(GPIO_BASE) = (reg_value & ~ mask) | (mask);
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}
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break;
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case PIN_IRQ_MODE_HIGH_LEVEL:
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if(pin_num == 0)
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{
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reg_value = GPIO_REG_GPHEN0(GPIO_BASE);
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GPIO_REG_GPHEN0(GPIO_BASE) = (reg_value & ~ mask) | (mask);
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}
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else
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{
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reg_value = GPIO_REG_GPHEN1(GPIO_BASE);
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GPIO_REG_GPHEN1(GPIO_BASE) = (reg_value & ~ mask) | ( mask);
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}
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break;
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case PIN_IRQ_MODE_LOW_LEVEL:
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if(pin_num == 0)
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{
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reg_value = GPIO_REG_GPLEN0(GPIO_BASE);
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GPIO_REG_GPLEN0(GPIO_BASE) = (reg_value & ~ mask) | (mask);
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}
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else
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{
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reg_value = GPIO_REG_GPLEN1(GPIO_BASE);
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GPIO_REG_GPLEN1(GPIO_BASE) = (reg_value & ~ mask) | (mask);
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}
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break;
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}
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2020-05-25 17:30:05 +08:00
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return RT_EOK;
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}
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static rt_err_t raspi_pin_detach_irq(struct rt_device *device, rt_int32_t pin)
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{
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2020-06-16 09:16:07 +08:00
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rt_uint8_t index;
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if (pin <= 27)
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index = 0;
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else if (pin <= 45)
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index = 1;
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else
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index = 2;
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_g_gpio_irq_tbl[index].irq_cb[pin] = RT_NULL;
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_g_gpio_irq_tbl[index].irq_arg[pin] = RT_NULL;
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_g_gpio_irq_tbl[index].irq_type[pin] = RT_NULL;
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_g_gpio_irq_tbl[index].state[pin] = RT_NULL;
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2020-05-25 17:30:05 +08:00
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return RT_EOK;
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}
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rt_err_t raspi_pin_irq_enable(struct rt_device *device, rt_base_t pin, rt_uint32_t enabled)
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{
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2020-06-16 09:16:07 +08:00
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rt_uint8_t index;
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if (pin <= 27)
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index = 0;
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else if (pin <= 45)
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index = 1;
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else
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index = 2;
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if (enabled)
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_g_gpio_irq_tbl[index].state[pin] = 1;
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else
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_g_gpio_irq_tbl[index].state[pin] = 0;
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2020-05-25 17:30:05 +08:00
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return RT_EOK;
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}
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static const struct rt_pin_ops ops =
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{
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raspi_pin_mode,
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raspi_pin_write,
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raspi_pin_read,
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raspi_pin_attach_irq,
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raspi_pin_detach_irq,
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raspi_pin_irq_enable,
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2020-09-11 11:16:42 +08:00
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RT_NULL,
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2020-05-25 17:30:05 +08:00
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};
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2020-06-16 09:16:07 +08:00
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static void gpio_irq_handler(int irq, void *param)
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{
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struct gpio_irq_def *irq_def = (struct gpio_irq_def *)param;
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rt_uint32_t pin;
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rt_uint32_t value;
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rt_uint32_t tmpvalue;
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if(irq == IRQ_GPIO0)
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|
|
|
{
|
|
|
|
/* 0~27 */
|
|
|
|
value = GPIO_REG_GPEDS0(GPIO_BASE);
|
|
|
|
value &= 0x0fffffff;
|
|
|
|
pin = 0;
|
|
|
|
GPIO_REG_GPEDS0(GPIO_BASE) = value;
|
|
|
|
}
|
|
|
|
else if(irq == IRQ_GPIO1)
|
|
|
|
{
|
|
|
|
/* 28-45 */
|
|
|
|
tmpvalue = GPIO_REG_GPEDS0(GPIO_BASE);
|
|
|
|
tmpvalue &= (~0x0fffffff);
|
|
|
|
GPIO_REG_GPEDS0(GPIO_BASE) = tmpvalue;
|
|
|
|
|
|
|
|
value = GPIO_REG_GPEDS1(GPIO_BASE);
|
|
|
|
value &= 0x3fff;
|
|
|
|
GPIO_REG_GPEDS1(GPIO_BASE) = value;
|
|
|
|
value = (value) | tmpvalue;
|
|
|
|
pin = 28;
|
|
|
|
}
|
|
|
|
else if (irq == IRQ_GPIO2)
|
|
|
|
{
|
|
|
|
/* 46-53 */
|
|
|
|
value = GPIO_REG_GPEDS1(GPIO_BASE);
|
|
|
|
value &= (~0x3fff);
|
|
|
|
GPIO_REG_GPEDS1(GPIO_BASE) = value;
|
|
|
|
pin = 46;
|
|
|
|
}
|
|
|
|
|
|
|
|
while (value)
|
|
|
|
{
|
|
|
|
if ((value & 0x1) && (irq_def->irq_cb[pin] != RT_NULL))
|
|
|
|
{
|
|
|
|
if(irq_def->state[pin])
|
|
|
|
{
|
|
|
|
irq_def->irq_cb[pin](irq_def->irq_arg[pin]);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
pin++;
|
|
|
|
value = value >> 1;
|
|
|
|
}
|
|
|
|
}
|
2020-05-25 17:30:05 +08:00
|
|
|
#endif
|
|
|
|
|
|
|
|
int rt_hw_gpio_init(void)
|
|
|
|
{
|
|
|
|
#ifdef BSP_USING_PIN
|
|
|
|
rt_device_pin_register("gpio", &ops, RT_NULL);
|
2020-06-16 09:16:07 +08:00
|
|
|
|
|
|
|
//disable all intr
|
|
|
|
GPIO_REG_GPEDS0(GPIO_BASE) = 0xffffffff;
|
|
|
|
GPIO_REG_GPEDS1(GPIO_BASE) = 0xffffffff;
|
|
|
|
|
|
|
|
GPIO_REG_GPREN0(GPIO_BASE) = 0x0;
|
|
|
|
GPIO_REG_GPREN1(GPIO_BASE) = 0x0;
|
|
|
|
|
|
|
|
GPIO_REG_GPFEN0(GPIO_BASE) = 0x0;
|
|
|
|
GPIO_REG_GPFEN1(GPIO_BASE) = 0x0;
|
|
|
|
|
|
|
|
GPIO_REG_GPHEN0(GPIO_BASE) = 0x0;
|
|
|
|
GPIO_REG_GPHEN1(GPIO_BASE) = 0x0;
|
|
|
|
|
|
|
|
GPIO_REG_GPAREN0(GPIO_BASE) = 0x0;
|
|
|
|
GPIO_REG_GPAREN1(GPIO_BASE) = 0x0;
|
|
|
|
|
|
|
|
GPIO_REG_GPAFEN0(GPIO_BASE) = 0x0;
|
|
|
|
GPIO_REG_GPAFEN0(GPIO_BASE) = 0x0;
|
|
|
|
|
|
|
|
rt_hw_interrupt_install(IRQ_GPIO0, gpio_irq_handler, &_g_gpio_irq_tbl[0], "gpio0_irq");
|
|
|
|
rt_hw_interrupt_umask(IRQ_GPIO0);
|
|
|
|
|
|
|
|
rt_hw_interrupt_install(IRQ_GPIO1, gpio_irq_handler, &_g_gpio_irq_tbl[1], "gpio1_irq");
|
|
|
|
rt_hw_interrupt_umask(IRQ_GPIO1);
|
|
|
|
|
|
|
|
rt_hw_interrupt_install(IRQ_GPIO2, gpio_irq_handler, &_g_gpio_irq_tbl[2], "gpio2_irq");
|
|
|
|
rt_hw_interrupt_umask(IRQ_GPIO2);
|
|
|
|
|
2020-05-25 17:30:05 +08:00
|
|
|
#endif
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
INIT_DEVICE_EXPORT(rt_hw_gpio_init);
|