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/* Copyright (c) 2023, Canaan Bright Sight Co., Ltd
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <rtthread.h>
#include <rthw.h>
#include <rtdevice.h>
#include <riscv_io.h>
#include <string.h>
#include "ioremap.h"
#include "board.h"
#include "drv_hardlock.h"
#include <rtdbg.h>
#define DBG_TAG "HARDLOCK"
#ifdef RT_DEBUG
#define DBG_LVL DBG_LOG
#else
#define DBG_LVL DBG_WARNING
#endif
#define DBG_COLOR
struct device_hardlock
{
volatile void *hw_base;
char used[HARDLOCK_MAX];
};
static struct device_hardlock hardlock;
int kd_hardlock_lock(hardlock_type num)
{
if(num < 0 || num >= HARDLOCK_MAX)
return -1;
if(!readl(hardlock.hw_base + num * 0x4))
{
LOG_D("hardlock-%d locked\n", num);
return 0;
}
LOG_D("hardlock-%d is busy\n", num);
return -1;
}
RTM_EXPORT(kd_hardlock_lock);
void kd_hardlock_unlock(hardlock_type num)
{
if(num < 0 || num >= HARDLOCK_MAX)
return;
if(readl(hardlock.hw_base + num * 0x4))
{
writel(0x0, hardlock.hw_base + num * 0x4);
}
LOG_D("hardlock-%d unlock\n", num);
}
RTM_EXPORT(kd_hardlock_unlock);
int kd_request_lock(hardlock_type num)
{
if(num < 0 || num >= HARDLOCK_MAX)
return -1;
if(!hardlock.used[num])
{
hardlock.used[num] = 1;
return 0;
}
LOG_E("request hardlock failed, hardlock-%d is used\n", num);
return -1;
}
RTM_EXPORT(kd_request_lock);
int rt_hw_hardlock_init(void)
{
struct device_hardlock *hard = &hardlock;
hard->hw_base = 0xA0 + rt_ioremap((void *)MAILBOX_BASE_ADDR, MAILBOX_IO_SIZE);
if(hard->hw_base == RT_NULL)
{
rt_kprintf("hardlock ioremap error\n");
return -1;
}
memset(hard->used, 0, sizeof(hard->used));
#if 0
rt_kprintf("canaan hardlock init OK\n");
#endif
return 0;
}
INIT_BOARD_EXPORT(rt_hw_hardlock_init);
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