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

/*
*********************************************************************************************************
*                                                AR100 SYSTEM
*                                     AR100 Software System Develop Kits
*                                              interrupt  module
*
*                                    (c) Copyright 2012-2016, Sunny China
*                                             All Rights Reserved
*
* File    : intc.c
* By      : Sunny
* Version : v1.0
* Date    : 2012-5-3
* Descript: interrupt controller module.
* Update  : date                auther      ver     notes
*           2012-5-3 13:25:40   Sunny       1.0     Create this file.
*********************************************************************************************************
*/

#include "intc_i.h"
#include "platform-intc.h"

struct intc_regs *pintc_regs;

/*
*********************************************************************************************************
*                                           INTERRUPT INIT
*
* Description:  initialize interrupt.
*
* Arguments  :  none.
*
* Returns    :  OK if initialize succeeded, others if failed.
*
* Note       :
*********************************************************************************************************
*/
s32 intc_init(void)
{
    pintc_regs = (struct intc_regs *)(SUNXI_R_INTC_PBASE);

    /*initialize interrupt controller */
    pintc_regs->enable = 0x0;
    pintc_regs->mask = 0x0;
    pintc_regs->pending = 0xffffffff;

    pintc_regs->enable1 = 0x0;
    pintc_regs->mask1 = 0x0;
    pintc_regs->pending1 = 0xffffffff;

    pintc_regs->enable2 = 0x0;
    pintc_regs->mask2 = 0x0;
    pintc_regs->pending2 = 0xffffffff;
    return OK;
}

/*
*********************************************************************************************************
*                                         INTERRUPT EXIT
*
* Description:  exit interrupt.
*
* Arguments  :  none.
*
* Returns    :  OK if exit succeeded, others if failed.
*
* Note       :
*********************************************************************************************************
*/
s32 intc_exit(void)
{
    pintc_regs = NULL;

    return OK;
}

/*
*********************************************************************************************************
*                                           ENABLE INTERRUPT
*
* Description:  enable a specific interrupt.
*
* Arguments  :  intno   : the source number of interrupt to which we want to enable.
*
* Returns    :  OK if enable interrupt succeeded, others if failed.
*
* Note       :
*********************************************************************************************************
*/
s32 intc_enable_interrupt(u32 intno)
{
    /*intno can't beyond then IRQ_SOURCE_MAX */
    /* ASSERT(intno < IRQ_SOUCE_MAX); */

    /*
     * NMI interrupt should clear before enable.
     * by sunny at 2012-6-12 19:30:22.
     */
    if (intno == SUNXI_RINTC_IRQ_NMI) {
        pintc_regs->pending = (1 << intno);
    }

    /*enable interrupt which number is intno */
    if (intno <= 31)
        pintc_regs->enable |= (1 << intno);
    else if (intno > 31 && intno <= 63)
        pintc_regs->enable1 |= (1 << (intno - 32));
    else
        pintc_regs->enable2 |= (1 << (intno - 64));

    return OK;
}

/*
*********************************************************************************************************
*                                           DISABLE INTERRUPT
*
* Description:  disable a specific interrupt.
*
* Arguments  :  intno  : the source number of interrupt which we want to disable.
*
* Returns    :  OK if disable interrupt succeeded, others if failed.
*
* Note       :
*********************************************************************************************************
*/
s32 intc_disable_interrupt(u32 intno)
{
    /*intno can't beyond then IRQ_SOURCE_MAX */
    /* ASSERT(intno < IRQ_SOUCE_MAX); */

    /*enable interrupt which number is intno */
    if (intno <= 31)
        pintc_regs->enable &= ~(1 << intno);
    else if (intno > 31 && intno <= 63)
        pintc_regs->enable1 &= ~(1 << (intno - 32));
    else
        pintc_regs->enable2 &= ~(1 << (intno - 64));

    return OK;
}

/*
*********************************************************************************************************
*                                   GET CURRENT INTERRUPT
*
* Description: get the source number of current interrupt.
*
* Arguments  : none.
*
* Returns    : the source number of current interrupt.
*
* Note       :
*********************************************************************************************************
*/
u32 intc_get_current_interrupt(void)
{
    volatile u32 interrupt;

    interrupt = (u32) ((pintc_regs->vector) >> 2);

    return interrupt;
}

s32 intc_set_mask(u32 intno, u32 mask)
{
    /* intno can't beyond then IRQ_SOURCE_MAX */
    /* ASSERT(intno < IRQ_SOUCE_MAX); */

    /* enable interrupt which number is intno */
    if (intno <= 31) {
        pintc_regs->mask &= ~(1 << intno);
        pintc_regs->mask |= (mask << intno);
    } else if (intno > 31 && intno <= 63) {
        pintc_regs->mask1 &= ~(1 << (intno - 32));
        pintc_regs->mask1 |= (mask << intno);
    } else {
        pintc_regs->mask2 &= ~(1 << (intno - 64));
        pintc_regs->mask2 |= (mask << intno);
    }

    return OK;
}

s32 intc_set_group_config(u32 grp_irq_num, u32 mask)
{
    if (grp_irq_num <= 31) {
        pintc_regs->group_config0 &= ~(1 << grp_irq_num);
        pintc_regs->group_config0 |= (mask << grp_irq_num);
    } else if (grp_irq_num > 31 && grp_irq_num <= 63) {
        pintc_regs->group_config1 &= ~(1 << (grp_irq_num - 32));
        pintc_regs->group_config1 |= (mask << grp_irq_num);
    } else if (grp_irq_num > 63 && grp_irq_num <= 95) {
        pintc_regs->group_config2 &= ~(1 << (grp_irq_num - 64));
        pintc_regs->group_config2 |= (mask << grp_irq_num);
    } else {
        pintc_regs->group_config3 &= ~(1 << (grp_irq_num - 64));
        pintc_regs->group_config3 |= (mask << grp_irq_num);
    }

    return OK;
}