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rt-thread-official/bsp/nuvoton/libraries/ma35/rtt_port/drv_gpio.c

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/**************************************************************************//**
*
* @copyright (C) 2020 Nuvoton Technology Corp. All rights reserved.
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2021-07-23 Wayne First version
*
******************************************************************************/
#include <rtconfig.h>
#if (defined(BSP_USING_GPIO) && defined(RT_USING_PIN))
#include <rtdevice.h>
#include <rthw.h>
#include "drv_common.h"
#include <drv_gpio.h>
#include "nu_bitutil.h"
#include "stdlib.h"
/* Private define ---------------------------------------------------------------*/
#define PORT_OFFSET 0x40
#define IRQ_MAX_NUM 16 //Max support 32
/* Private functions ------------------------------------------------------------*/
static void nu_gpio_mode(struct rt_device *device, rt_base_t pin, rt_uint8_t mode);
static void nu_gpio_write(struct rt_device *device, rt_base_t pin, rt_uint8_t value);
static rt_int8_t nu_gpio_read(struct rt_device *device, rt_base_t pin);
static rt_err_t nu_gpio_attach_irq(struct rt_device *device, rt_int32_t pin, rt_uint8_t mode, void (*hdr)(void *args), void *args);
static rt_err_t nu_gpio_detach_irq(struct rt_device *device, rt_int32_t pin);
static rt_err_t nu_gpio_irq_enable(struct rt_device *device, rt_base_t pin, rt_uint8_t enabled);
static rt_base_t nu_gpio_pin_get(const char *name);
/* Private variables ------------------------------------------------------------*/
static struct rt_pin_irq_hdr pin_irq_hdr_tab[IRQ_MAX_NUM];
static struct rt_pin_ops nu_gpio_ops =
{
nu_gpio_mode,
nu_gpio_write,
nu_gpio_read,
nu_gpio_attach_irq,
nu_gpio_detach_irq,
nu_gpio_irq_enable,
nu_gpio_pin_get,
};
static IRQn_Type au32GPIRQ[NU_PORT_CNT] = {GPA_IRQn, GPB_IRQn, GPC_IRQn, GPD_IRQn, GPE_IRQn, GPF_IRQn, GPG_IRQn, GPH_IRQn, GPI_IRQn, GPJ_IRQn, GPK_IRQn, GPL_IRQn, GPM_IRQn, GPN_IRQn};
static rt_uint32_t g_u32PinIrqMask = 0x0;
/* Functions define ------------------------------------------------------------*/
static rt_err_t nu_port_check(rt_int32_t pin)
{
if (NU_GET_PORT(pin) >= NU_PORT_CNT)
return -(RT_ERROR);
return RT_EOK;
}
static rt_int32_t nu_find_irqindex(rt_uint32_t pin_index)
{
rt_int32_t irqindex;
rt_int32_t u32PinIrqStatus = g_u32PinIrqMask;
// Find index of pin is attached in pool.
while ((irqindex = nu_ctz(u32PinIrqStatus)) < IRQ_MAX_NUM) // Count Trailing Zeros ==> Find First One
{
if (pin_irq_hdr_tab[irqindex].pin == pin_index)
return irqindex;
u32PinIrqStatus &= ~(1 << irqindex);
}
return -(RT_ERROR);
}
static void pin_irq_hdr(rt_uint32_t irq_status, rt_uint32_t port_index)
{
rt_int32_t irqindex, i;
rt_int32_t pinindex = port_index * GPIO_PIN_MAX ;
while ((i = nu_ctz(irq_status)) < GPIO_PIN_MAX)// Count Trailing Zeros ==> Find First One
{
int pin_mask = (1 << i);
irqindex = nu_find_irqindex(pinindex + i);
if (irqindex != -(RT_ERROR))
{
if (pin_irq_hdr_tab[irqindex].hdr)
{
pin_irq_hdr_tab[irqindex].hdr(pin_irq_hdr_tab[irqindex].args);
}
}
// Clear the served bit.
irq_status &= ~pin_mask;
}
}
static rt_base_t nu_gpio_pin_get(const char *name)
{
/* Get pin number by name,such as PA.0, PF12 */
if ((name[2] == '\0') || ((name[2] == '.') && (name[3] == '\0')))
return -(RT_EINVAL);
long number;
if ((name[2] == '.'))
number = atol(&name[3]);
else
number = atol(&name[2]);
if (number > 15)
return -(RT_EINVAL);
if (name[1] >= 'A' && name[1] <= 'N')
return ((name[1] - 'A') * 0x10) + number;
if (name[1] >= 'a' && name[1] <= 'n')
return ((name[1] - 'a') * 0x10) + number;
return -(RT_EINVAL);
}
static void nu_gpio_mode(struct rt_device *device, rt_base_t pin, rt_uint8_t mode)
{
GPIO_T *PORT;
if (nu_port_check(pin))
return;
PORT = (GPIO_T *)(GPIOA_BASE + (NU_GET_PORT(pin) * PORT_OFFSET));
if (mode == PIN_MODE_INPUT_PULLUP)
{
GPIO_SetMode(PORT, NU_GET_PIN_MASK(NU_GET_PINS(pin)), GPIO_MODE_INPUT);
GPIO_SetPullCtl(PORT, NU_GET_PIN_MASK(NU_GET_PINS(pin)), GPIO_PUSEL_PULL_UP);
}
else if (mode == PIN_MODE_INPUT_PULLDOWN)
{
GPIO_SetMode(PORT, NU_GET_PIN_MASK(NU_GET_PINS(pin)), GPIO_MODE_INPUT);
GPIO_SetPullCtl(PORT, NU_GET_PIN_MASK(NU_GET_PINS(pin)), GPIO_PUSEL_PULL_DOWN);
}
else if (mode == PIN_MODE_OUTPUT)
{
GPIO_SetMode(PORT, NU_GET_PIN_MASK(NU_GET_PINS(pin)), GPIO_MODE_OUTPUT);
}
else if (mode == PIN_MODE_INPUT)
{
GPIO_SetMode(PORT, NU_GET_PIN_MASK(NU_GET_PINS(pin)), GPIO_MODE_INPUT);
GPIO_SetPullCtl(PORT, NU_GET_PIN_MASK(NU_GET_PINS(pin)), GPIO_PUSEL_DISABLE);
}
else if (mode == PIN_MODE_OUTPUT_OD)
{
GPIO_SetMode(PORT, NU_GET_PIN_MASK(NU_GET_PINS(pin)), GPIO_MODE_OPEN_DRAIN);
GPIO_SetPullCtl(PORT, NU_GET_PIN_MASK(NU_GET_PINS(pin)), GPIO_PUSEL_DISABLE);
}
}
static void nu_gpio_write(struct rt_device *device, rt_base_t pin, rt_uint8_t value)
{
if (nu_port_check(pin))
return;
GPIO_PIN_DATA(NU_GET_PORT(pin), NU_GET_PINS(pin)) = value;
}
static rt_int8_t nu_gpio_read(struct rt_device *device, rt_base_t pin)
{
if (nu_port_check(pin))
return PIN_LOW;
return GPIO_PIN_DATA(NU_GET_PORT(pin), NU_GET_PINS(pin));
}
static rt_err_t nu_gpio_attach_irq(struct rt_device *device, rt_int32_t pin, rt_uint8_t mode, void (*hdr)(void *args), void *args)
{
rt_base_t level;
rt_int32_t irqindex;
if (nu_port_check(pin))
return -(RT_ERROR);
level = rt_hw_interrupt_disable();
// Find index of pin is attached in pool.
if ((irqindex = nu_find_irqindex(pin)) >= 0)
goto exit_nu_gpio_attach_irq;
// Find available index of pin in pool.
if ((irqindex = nu_cto(g_u32PinIrqMask)) < IRQ_MAX_NUM) // Count Trailing Ones ==> Find First Zero
goto exit_nu_gpio_attach_irq;
rt_hw_interrupt_enable(level);
return -(RT_EBUSY);
exit_nu_gpio_attach_irq:
pin_irq_hdr_tab[irqindex].pin = pin;
pin_irq_hdr_tab[irqindex].hdr = hdr;
pin_irq_hdr_tab[irqindex].mode = mode;
pin_irq_hdr_tab[irqindex].args = args;
g_u32PinIrqMask |= (1 << irqindex);
rt_hw_interrupt_enable(level);
return RT_EOK;
}
static rt_err_t nu_gpio_detach_irq(struct rt_device *device, rt_int32_t pin)
{
rt_base_t level;
rt_int32_t irqindex;
rt_int32_t u32PinIrqStatus;
if (nu_port_check(pin))
return -(RT_ERROR);
level = rt_hw_interrupt_disable();
u32PinIrqStatus = g_u32PinIrqMask;
// Find index of pin is attached in pool.
while ((irqindex = nu_ctz(u32PinIrqStatus)) < IRQ_MAX_NUM)// Count Trailing Zeros ==> Find First One
{
if (pin_irq_hdr_tab[irqindex].pin == pin)
{
pin_irq_hdr_tab[irqindex].pin = PIN_IRQ_PIN_NONE;
pin_irq_hdr_tab[irqindex].hdr = RT_NULL;
pin_irq_hdr_tab[irqindex].mode = PIN_IRQ_MODE_RISING;
pin_irq_hdr_tab[irqindex].args = RT_NULL;
g_u32PinIrqMask &= ~(1 << irqindex);
break;
}
u32PinIrqStatus &= ~(1 << irqindex);
}
rt_hw_interrupt_enable(level);
return RT_EOK;
}
static void nu_gpio_isr(int vector, void *param)
{
rt_uint32_t int_status;
GPIO_T *PORT = (GPIO_T *)param;
rt_uint32_t port_idx = ((rt_uint32_t)PORT - GPIOA_BASE) / PORT_OFFSET ;
int_status = PORT->INTSRC;
pin_irq_hdr(int_status, port_idx);
PORT->INTSRC = int_status;
}
static rt_err_t nu_gpio_irq_enable(struct rt_device *device, rt_base_t pin, rt_uint8_t enabled)
{
GPIO_T *PORT;
rt_base_t level;
uint32_t u32IntAttribs;
rt_int32_t irqindex;
rt_err_t ret = RT_EOK;
IRQn_Type irqn;
if (nu_port_check(pin))
return -(RT_ERROR);
level = rt_hw_interrupt_disable();
irqindex = nu_find_irqindex(pin);
if (irqindex == -(RT_ERROR))
{
ret = -RT_ERROR;
goto exit_nu_gpio_irq_enable;
}
PORT = (GPIO_T *)(GPIOA_BASE + (NU_GET_PORT(pin) * PORT_OFFSET));
irqn = au32GPIRQ[NU_GET_PORT(pin)];
if (enabled == PIN_IRQ_ENABLE)
{
if (pin_irq_hdr_tab[irqindex].mode == PIN_IRQ_MODE_RISING)
u32IntAttribs = GPIO_INT_RISING;
else if (pin_irq_hdr_tab[irqindex].mode == PIN_IRQ_MODE_FALLING)
u32IntAttribs = GPIO_INT_FALLING;
else if (pin_irq_hdr_tab[irqindex].mode == PIN_IRQ_MODE_RISING_FALLING)
u32IntAttribs = GPIO_INT_BOTH_EDGE;
else if (pin_irq_hdr_tab[irqindex].mode == PIN_IRQ_MODE_HIGH_LEVEL)
u32IntAttribs = GPIO_INT_HIGH;
else if (pin_irq_hdr_tab[irqindex].mode == PIN_IRQ_MODE_LOW_LEVEL)
u32IntAttribs = GPIO_INT_LOW;
else
goto exit_nu_gpio_irq_enable;
GPIO_EnableInt(PORT, NU_GET_PINS(pin), u32IntAttribs);
rt_hw_interrupt_umask(irqn);
}
else
{
GPIO_DisableInt(PORT, NU_GET_PINS(pin));
rt_hw_interrupt_mask(irqn);
}
exit_nu_gpio_irq_enable:
rt_hw_interrupt_enable(level);
return -(ret);
}
int rt_hw_gpio_init(void)
{
char szTmp[16];
int i;
rt_int32_t irqindex;
for (irqindex = 0; irqindex < IRQ_MAX_NUM ; irqindex++)
{
pin_irq_hdr_tab[irqindex].pin = PIN_IRQ_PIN_NONE;
pin_irq_hdr_tab[irqindex].hdr = RT_NULL;
pin_irq_hdr_tab[irqindex].mode = PIN_IRQ_MODE_RISING;
pin_irq_hdr_tab[irqindex].args = RT_NULL;
}
for (i = 0; i < NU_PORT_CNT ; i++)
{
IRQn_Type irqn = au32GPIRQ[i];
rt_snprintf(szTmp, sizeof(szTmp), "gpio-%d", i);
rt_hw_interrupt_install(irqn, nu_gpio_isr, (void *)(GPIOA_BASE + (i * PORT_OFFSET)), szTmp);
}
return rt_device_pin_register("gpio", &nu_gpio_ops, RT_NULL);
}
INIT_BOARD_EXPORT(rt_hw_gpio_init);
#endif //#if (defined(BSP_USING_GPIO) && defined(RT_USING_PIN))
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