/*
 * Copyright (c) 2022 Winner Microelectronics Co., Ltd. All rights reserved.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/**
 * @file wm_gpio.c
 *
 * @brief GPIO Driver Module
 *
 * @author dave
 *
 * Copyright (c) 2014 Winner Microelectronics Co., Ltd.
 */
#include "wm_gpio.h"
#include "wm_regs.h"
#include "wm_irq.h"
#include "wm_osal.h"
#include "tls_common.h"

struct gpio_irq_context {
    tls_gpio_irq_callback callback;
    void *arg;
};

static struct gpio_irq_context gpio_context[WM_IO_PB_31 - WM_IO_PA_00 + 1] = {{0, 0}};

ATTRIBUTE_ISR void GPIOA_IRQHandler(void)
{
    u8  i     = 0;
    u8  found = 0;
    u32 reg   = 0;
    csi_kernel_intrpt_enter();

    reg = tls_reg_read32(HR_GPIO_MIS);

    for (i = 0; i <= WM_IO_PA_15; i++) {
        if (reg & BIT(i)) {
            found = 1;
            break;
        }
    }

    if (found) {
        if (gpio_context[i].callback != NULL)
            gpio_context[i].callback(gpio_context[i].arg);
    }
    csi_kernel_intrpt_exit();
}

ATTRIBUTE_ISR void GPIOB_IRQHandler(void)
{
    u8  i     = 0;
    u8  found = 0;
    u32 reg   = 0;
    csi_kernel_intrpt_enter();
    reg = tls_reg_read32(HR_GPIO_MIS + TLS_IO_AB_OFFSET);

    for (i = WM_IO_PB_00; i <= WM_IO_PB_31; i++) {
        if (reg & BIT(i - WM_IO_PB_00)) {
            found = 1;
            break;
        }
    }

    if (found) {
        if (gpio_context[i].callback != NULL)
            gpio_context[i].callback(gpio_context[i].arg);
    }
    csi_kernel_intrpt_exit();
}

/**
 * @brief          This function is used to config gpio function
 *
 * @param[in]      gpio_pin    gpio pin num
 * @param[in]      dir         gpio direction
 * @param[in]      attr        gpio attribute
 *
 * @return         None
 *
 * @note
 */
void tls_gpio_cfg(enum tls_io_name gpio_pin, enum tls_gpio_dir dir, enum tls_gpio_attr attr)
{
    u8    pin;
    u16 offset;

    if (gpio_pin >= WM_IO_PB_00) {
        pin    = gpio_pin - WM_IO_PB_00;
        offset = TLS_IO_AB_OFFSET;
    } else {
        pin    = gpio_pin;
        offset = 0;
    }

    /* enable gpio function */
    tls_io_cfg_set(gpio_pin, WM_IO_OPT5_GPIO);

    /* gpio direction */
    if (WM_GPIO_DIR_OUTPUT == dir)
        tls_reg_write32(HR_GPIO_DIR + offset, tls_reg_read32(HR_GPIO_DIR + offset) | BIT(pin));      /* 1 set output */
    else if (WM_GPIO_DIR_INPUT == dir)
        tls_reg_write32(HR_GPIO_DIR + offset, tls_reg_read32(HR_GPIO_DIR + offset) & (~BIT(pin)));     /* 0 set input */

    /* gpio attribute */
    if (WM_GPIO_ATTR_FLOATING == attr) {
        /* 1 disable pullup */
        tls_reg_write32(HR_GPIO_PULLUP_EN + offset, tls_reg_read32(HR_GPIO_PULLUP_EN + offset) | BIT(pin));
        /* 1 disable pulldown */
        tls_reg_write32(HR_GPIO_PULLDOWN_EN + offset, tls_reg_read32(HR_GPIO_PULLDOWN_EN + offset)&(~BIT(pin)));
    }
    if (WM_GPIO_ATTR_PULLHIGH == attr) {
        /* 0 enable pullup */
        tls_reg_write32(HR_GPIO_PULLUP_EN + offset, tls_reg_read32(HR_GPIO_PULLUP_EN + offset) & (~BIT(pin)));
        /* 0 disable pulldown */
        tls_reg_write32(HR_GPIO_PULLDOWN_EN + offset, tls_reg_read32(HR_GPIO_PULLDOWN_EN + offset) &(~BIT(pin)));
    }

    if (WM_GPIO_ATTR_PULLLOW == attr) {
        /* 0 disable pullup */
        tls_reg_write32(HR_GPIO_PULLUP_EN + offset, tls_reg_read32(HR_GPIO_PULLUP_EN + offset) | BIT(pin));
        /* 1 disable pulldown */
        tls_reg_write32(HR_GPIO_PULLDOWN_EN + offset, tls_reg_read32(HR_GPIO_PULLDOWN_EN + offset) | BIT(pin));
    }
}

/**
 * @brief          This function is used to read gpio status
 *
 * @param[in]      gpio_pin    gpio pin num
 *
 * @retval         0     power level is low
 * @retval         1     power level is high
 *
 * @note           None
 */
u8 tls_gpio_read(enum tls_io_name gpio_pin)
{
    u32 reg_en;
    u32 reg;
    u8  pin;
    u16 offset;

    if (gpio_pin >= WM_IO_PB_00) {
        pin    = gpio_pin - WM_IO_PB_00;
        offset = TLS_IO_AB_OFFSET;
    } else {
        pin    = gpio_pin;
        offset = 0;
    }

    reg_en = tls_reg_read32(HR_GPIO_DATA_EN + offset);
    tls_reg_write32(HR_GPIO_DATA_EN + offset, reg_en | (1 << pin));
    reg = tls_reg_read32(HR_GPIO_DATA + offset);
    tls_reg_write32(HR_GPIO_DATA_EN + offset, reg_en);
    if (reg & (0x1 << pin))
        return 1;
    else
        return 0;
}

/**
 * @brief          This function is used to modify gpio status
 *
 * @param[in]      gpio_pin    gpio pin num
 * @param[in]      value       power level
 *                             0: low  power level
 *                                1: high power level
 *
 * @return         None
 *
 * @note           None
 */
void tls_gpio_write(enum tls_io_name gpio_pin, u8 value)
{
    u32 cpu_sr = 0;
    u32 reg;
    u32    reg_en;
    u8  pin;
    u16 offset;

    if (gpio_pin >= WM_IO_PB_00) {
        pin    = gpio_pin - WM_IO_PB_00;
        offset = TLS_IO_AB_OFFSET;
    } else {
        pin    = gpio_pin;
        offset = 0;
    }

    cpu_sr = tls_os_set_critical();
   
    reg_en = tls_reg_read32(HR_GPIO_DATA_EN + offset);
    tls_reg_write32(HR_GPIO_DATA_EN + offset, reg_en | (1 << pin));

    reg = tls_reg_read32(HR_GPIO_DATA + offset);
    if (value)
        tls_reg_write32(HR_GPIO_DATA + offset, reg |  (1 << pin));    /* write high */
    else
        tls_reg_write32(HR_GPIO_DATA + offset, reg & (~(1 << pin))); /* write low */

    tls_reg_write32(HR_GPIO_DATA_EN + offset, reg_en);

    tls_os_release_critical(cpu_sr);
}

/**
 * @brief          This function is used to config gpio interrupt
 *
 * @param[in]      gpio_pin    gpio pin num
 * @param[in]      mode        interrupt trigger type
 *
 * @return         None
 *
 * @note           None
 */
void tls_gpio_irq_enable(enum tls_io_name gpio_pin, enum tls_gpio_irq_trig mode)
{
    u32 reg;
    u8  pin;
    u16 offset;
    u8  vec_no;

    if (gpio_pin >= WM_IO_PB_00) {
        pin    = gpio_pin - WM_IO_PB_00;
        offset = TLS_IO_AB_OFFSET;
        vec_no = GPIOB_IRQn;
    } else {
        pin    = gpio_pin;
        offset = 0;
        vec_no = GPIOA_IRQn;
    }

    switch (mode) {
        case WM_GPIO_IRQ_TRIG_RISING_EDGE:
            reg = tls_reg_read32(HR_GPIO_IS + offset);
            reg &= (~(0x1 << pin));
        //   TLS_DBGPRT_INFO("\r\nrising edge is ret=%x\r\n",reg);
            tls_reg_write32(HR_GPIO_IS + offset, reg);        /* 0 edge trigger */
            reg = tls_reg_read32(HR_GPIO_IBE + offset);
            reg &= (~(0x1 << pin));
        //   TLS_DBGPRT_INFO("\r\nrising edge ibe ret=%x\r\n",reg);
            tls_reg_write32(HR_GPIO_IBE + offset, reg);    /* 0 edge trigger */
            reg = tls_reg_read32(HR_GPIO_IEV + offset);
            reg |= (0x1 << pin);
        //   TLS_DBGPRT_INFO("\r\nrising edge iev ret=%x\r\n",reg);
            tls_reg_write32(HR_GPIO_IEV + offset, reg);    /* 1 rising edge trigger */
            break;
        case WM_GPIO_IRQ_TRIG_FALLING_EDGE:
            reg = tls_reg_read32(HR_GPIO_IS + offset);
            reg &= (~(0x1 << pin));
        //   TLS_DBGPRT_INFO("\falling edge is ret=%x\n",reg);
            tls_reg_write32(HR_GPIO_IS + offset, reg);        /* 0 edge trigger */
            reg = tls_reg_read32(HR_GPIO_IBE + offset);
            reg &= (~(0x1 << pin));
        //   TLS_DBGPRT_INFO("\falling edge ibe ret=%x\n",reg);
            tls_reg_write32(HR_GPIO_IBE + offset, reg);    /* 0 edge trigger */
            reg = tls_reg_read32(HR_GPIO_IEV + offset);
            reg &= (~(0x1 << pin));
        //   TLS_DBGPRT_INFO("\falling edge iev ret=%x\n",reg);
            tls_reg_write32(HR_GPIO_IEV + offset, reg);    /* 0 falling edge trigger */
            break;
        case WM_GPIO_IRQ_TRIG_DOUBLE_EDGE:
            reg = tls_reg_read32(HR_GPIO_IS + offset);
            tls_reg_write32(HR_GPIO_IS + offset, reg & (~(0x1 << pin)));    /* 0 edge trigger */
            reg = tls_reg_read32(HR_GPIO_IBE + offset);
            tls_reg_write32(HR_GPIO_IBE + offset, reg | (0x1 << pin));       /* 1 double edge trigger */
            break;
        case WM_GPIO_IRQ_TRIG_HIGH_LEVEL:
            reg = tls_reg_read32(HR_GPIO_IS + offset);
            tls_reg_write32(HR_GPIO_IS + offset, reg | (0x1 << pin));        /* 1 level trigger */
            reg = tls_reg_read32(HR_GPIO_IEV + offset);
            tls_reg_write32(HR_GPIO_IEV + offset, reg | (0x1 << pin));        /* 1 high level trigger */
            break;
        case WM_GPIO_IRQ_TRIG_LOW_LEVEL:
            reg = tls_reg_read32(HR_GPIO_IS + offset);
            tls_reg_write32(HR_GPIO_IS + offset, reg | (0x1 << pin));        /* 1 level trigger */
            reg = tls_reg_read32(HR_GPIO_IEV + offset);
            tls_reg_write32(HR_GPIO_IEV + offset, reg & (~(0x1 << pin)));    /* 0 low level trigger */
            break;
    }

    reg = tls_reg_read32(HR_GPIO_IE + offset);
    reg |= (0x1 << pin);
    tls_reg_write32(HR_GPIO_IE + offset, reg);        /* enable interrupt */

    tls_irq_enable(vec_no);
}

/**
 * @brief          This function is used to disable gpio interrupt
 *
 * @param[in]      gpio_pin    gpio pin num
 *
 * @return         None
 *
 * @note           None
 */
void tls_gpio_irq_disable(enum tls_io_name gpio_pin)
{
    u32 reg;
    u8  pin;
    u16 offset;

    if (gpio_pin >= WM_IO_PB_00) {
        pin    = gpio_pin - WM_IO_PB_00;
        offset = TLS_IO_AB_OFFSET;
        reg = tls_reg_read32(HR_GPIO_IE + offset);
        tls_reg_write32(HR_GPIO_IE + offset, reg & (~(0x1 << pin)));    /* disable interrupt */
        reg = reg&(~(0x1 << pin));
        if (reg == 0) {
            tls_irq_disable(GPIOB_IRQn);
        }
    } else {
        pin    = gpio_pin;
        offset = 0;
        reg = tls_reg_read32(HR_GPIO_IE + offset);
        tls_reg_write32(HR_GPIO_IE + offset, reg & (~(0x1 << pin)));    /* disable interrupt */
        reg = (reg&(~(0x1 << pin)))&0xFFFF;
        if (reg == 0) {
            tls_irq_disable(GPIOA_IRQn);
        }
    }
}

/**
 * @brief          This function is used to get gpio interrupt status
 *
 * @param[in]      gpio_pin    gpio pin num
 *
 * @retval         0     no interrupt happened
 * @retval         1     interrupt happened
 *
 * @note           None
 */
u8 tls_get_gpio_irq_status(enum tls_io_name gpio_pin)
{
    u32 reg;
    u8  pin;
    u16 offset;

    if (gpio_pin >= WM_IO_PB_00) {
        pin    = gpio_pin - WM_IO_PB_00;
        offset = TLS_IO_AB_OFFSET;
    } else {
        pin    = gpio_pin;
        offset = 0;
    }

    reg = tls_reg_read32(HR_GPIO_RIS + offset);
    if (reg & (0x1 << pin))
        return    1;
    else
        return    0;
}

/**
 * @brief          This function is used to clear gpio interrupt flag
 *
 * @param[in]      gpio_pin    gpio pin num
 *
 * @return         None
 *
 * @note           None
 */
void tls_clr_gpio_irq_status(enum tls_io_name gpio_pin)
{
    u8  pin;
    u16 offset;

    if (gpio_pin >= WM_IO_PB_00) {
        pin    = gpio_pin - WM_IO_PB_00;
        offset = TLS_IO_AB_OFFSET;
    } else {
        pin    = gpio_pin;
        offset = 0;
    }

    tls_reg_write32(HR_GPIO_IC + offset, (0x1 << pin));        /* 1 clear interrupt status */
}

/**
 * @brief          This function is used to register gpio interrupt
 *
 * @param[in]      gpio_pin    gpio pin num
 * @param[in]      callback    the gpio interrupt call back function
 * @param[in]      arg         parammeter for the callback
 *
 * @return         None
 *
 * @note
 * gpio callback function is called in interrupt,
 * so can not operate the critical data in the callback fuuction,
 * recommendation to send messages to other tasks to operate it.
 */
void tls_gpio_isr_register(enum tls_io_name gpio_pin,
                           tls_gpio_irq_callback callback,
                           void *arg)
{
    gpio_context[gpio_pin].callback = callback;
    gpio_context[gpio_pin].arg = arg;
}