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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.
*/
/*
* Copyright (c) 2006-2025 RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <drivers/adc.h>
#include <ioremap.h>
#include <rtthread.h>
#include <rthw.h>
#include <rtdevice.h>
#include <riscv_io.h>
#include <string.h>
#include "board.h"
#include "drv_adc.h"
struct k230_adc adc_dev;
static int k230_adc_hw_init(struct k230_adc_regs *adc_regs)
{
rt_uint32_t reg;
reg = readl(&adc_regs->trim_reg);
reg &= (~(0x1));
writel(reg, &adc_regs->trim_reg);
reg = readl(&adc_regs->trim_reg);
reg |= 0x1;
writel(reg, &adc_regs->trim_reg);
reg = readl(&adc_regs->trim_reg);
reg |= (0x1 << 20);
writel(reg, &adc_regs->trim_reg);
/* delay 150us */
rt_hw_us_delay(150);
reg &= ~(0x1 << 20);
writel(reg, &adc_regs->trim_reg);
writel(0x0, &adc_regs->mode_reg);
return RT_EOK;
}
static int k230_adc_init()
{
int i;
adc_dev.adc_regs = (struct k230_adc_regs*)rt_ioremap((void *)ADC_BASE_ADDR, ADC_IO_SIZE);
for (i = 0; i < ADC_MAX_DMA_CHN; i++)
{
adc_dev.chn[i].chn_num = i;
adc_dev.chn[i].enabled = 0;
}
k230_adc_hw_init(adc_dev.adc_regs);
return RT_EOK;
}
static int k_adc_drv_enabled(struct k230_adc_regs *adc_regs)
{
rt_uint32_t reg;
reg = readl(&adc_regs->trim_reg);
reg |= 0x1;
writel(reg, &adc_regs->trim_reg);
return RT_EOK;
}
static int k_adc_drv_disabled(struct k230_adc_regs *adc_regs)
{
rt_uint32_t reg;
reg = readl(&adc_regs->trim_reg);
reg = reg & (~(0x1));
writel(reg, &adc_regs->trim_reg);
return RT_EOK;
}
rt_err_t k230_adc_enabled(struct rt_adc_device *device, rt_int8_t channel, rt_bool_t enabled)
{
if (channel >= ADC_MAX_CHANNEL)
return -RT_ERROR;
struct k230_adc *kd_adc = rt_container_of(device, struct k230_adc, dev);
kd_adc->chn[channel].enabled = 1;
if (enabled)
{
kd_adc->chn[channel].enabled = 1;
}
else
{
kd_adc->chn[channel].enabled = 0;
}
return RT_EOK;
}
rt_err_t k230_get_adc_value(struct rt_adc_device *device, rt_int8_t channel, rt_uint32_t *value)
{
if (channel >= ADC_MAX_CHANNEL)
return -RT_ERROR;
struct k230_adc *kd_adc = rt_container_of(device, struct k230_adc, dev);
if (!kd_adc->chn[channel].enabled)
return -RT_ERROR;
writel(channel | 0x10, &kd_adc->adc_regs->cfg_reg);
while ((readl(&kd_adc->adc_regs->cfg_reg) & 0x10000) == 0);
*value = readl(&kd_adc->adc_regs->data_reg[channel]);
return RT_EOK;
}
static const struct rt_adc_ops k230_adc_ops =
{
.enabled = k230_adc_enabled,
.convert = k230_get_adc_value,
};
int rt_hw_adc_init(void)
{
k230_adc_init();
rt_hw_adc_register(&adc_dev.dev, K230_ADC_NAME, &k230_adc_ops, NULL);
return RT_EOK;
}
INIT_BOARD_EXPORT(rt_hw_adc_init);
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