rt-thread/bsp/allwinner/libraries/sunxi-hal/hal/source/lradc/hal_lradc.c

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#include <sunxi_hal_lradc.h>


lradc_func_data lradc_priv;

static uint32_t base_addr = LRADC_BASE;

static uint32_t ctrl_para = FIRST_CONCERT_DLY | ADC_CHAN_SELECT | KEY_MODE_SELECT
                | LRADC_HOLD_EN & LEVELB_VOL & LRADC_SAMPLE_2KHZ | LRADC_EN;

static uint32_t irq_para = LRADC_ADC0_UP_EN | LRADC_ADC0_DOWN_EN | LRADC_ADC0_DATA_EN;

static void lradc_ctrl_set(void)
{
    uint32_t reg_val = 0;

    reg_val = hal_readl(base_addr + LRADC_CTRL_REG);
    reg_val |= ctrl_para;
    hal_writel(reg_val, base_addr + LRADC_CTRL_REG);
}

static void lradc_ctrl_reset(void)
{
    uint32_t reg_val = 0;

    reg_val = hal_readl(base_addr + LRADC_CTRL_REG);
    reg_val &= ~ctrl_para;
    hal_writel(reg_val, base_addr + LRADC_CTRL_REG);
}

static void lradc_irq_set(void)
{
    uint32_t reg_val = 0;

    reg_val = hal_readl(base_addr + LRADC_INTC_REG);
    reg_val |= irq_para;
    hal_writel(reg_val, base_addr + LRADC_INTC_REG);
}

static void lradc_irq_reset(void)
{
    uint32_t reg_val = 0;

    reg_val = hal_readl(base_addr + LRADC_INTC_REG);
    reg_val &= ~irq_para;
    hal_writel(reg_val, base_addr + LRADC_INTC_REG);
}

static void lradc_register_callback(lradc_callback_t user_callback)
{
    lradc_priv.func = user_callback;
}

static irqreturn_t lradc_irq_handler(int dummy, void *priv_data)
{
    lradc_func_data *lradc_priv = priv_data;
    lradc_callback_t callback = lradc_priv->func;
    void *arg = lradc_priv->arg;

    uint32_t irq_status = hal_readl(base_addr + LRADC_INTS_REG);
    uint32_t reg_val = hal_readl(base_addr + LRADC_DATA0_REG);

    if (NULL != callback)
        callback(irq_status, reg_val);

    hal_writel(reg_val, base_addr + LRADC_INTS_REG);

    return 0;
}

static int32_t lradc_init_irq(void)
{
    uint32_t irqn = SUNXI_IRQ_LRADC;
    if (request_irq(irqn, lradc_irq_handler, 0, "lradc", &lradc_priv) < 0) {
        return -1;
    }

    enable_irq(irqn);

    return 0;
}

hal_lradc_status_t hal_lradc_init(void)
{
    //sunxi_clk_init();
    lradc_ctrl_set();
    lradc_irq_set();
    lradc_init_irq();

    return HAL_ADC_STATUS_OK;
}

hal_lradc_status_t hal_lradc_deinit(void)
{
    lradc_irq_reset();
    lradc_ctrl_reset();

    return HAL_ADC_STATUS_OK;
}

hal_lradc_status_t hal_lradc_register_callback(lradc_callback_t callback)
{
    lradc_register_callback(callback);

    return HAL_ADC_STATUS_OK;
}