mirror of https://github.com/RT-Thread/rt-thread
163 lines
4.1 KiB
C
163 lines
4.1 KiB
C
/* Copyright (c) 2023, Canaan Bright Sight Co., Ltd
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 2006-2025 RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <drivers/adc.h>
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#include <ioremap.h>
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#include <rtthread.h>
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#include <rthw.h>
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#include <rtdevice.h>
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#include <riscv_io.h>
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#include <string.h>
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#include "board.h"
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#include "drv_adc.h"
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struct k230_adc adc_dev;
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static int k230_adc_hw_init(struct k230_adc_regs *adc_regs)
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{
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rt_uint32_t reg;
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reg = readl(&adc_regs->trim_reg);
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reg &= (~(0x1));
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writel(reg, &adc_regs->trim_reg);
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reg = readl(&adc_regs->trim_reg);
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reg |= 0x1;
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writel(reg, &adc_regs->trim_reg);
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reg = readl(&adc_regs->trim_reg);
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reg |= (0x1 << 20);
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writel(reg, &adc_regs->trim_reg);
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/* delay 150us */
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rt_hw_us_delay(150);
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reg &= ~(0x1 << 20);
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writel(reg, &adc_regs->trim_reg);
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writel(0x0, &adc_regs->mode_reg);
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return RT_EOK;
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}
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static int k230_adc_init()
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{
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int i;
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adc_dev.adc_regs = (struct k230_adc_regs*)rt_ioremap((void *)ADC_BASE_ADDR, ADC_IO_SIZE);
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for (i = 0; i < ADC_MAX_DMA_CHN; i++)
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{
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adc_dev.chn[i].chn_num = i;
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adc_dev.chn[i].enabled = 0;
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}
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k230_adc_hw_init(adc_dev.adc_regs);
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return RT_EOK;
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}
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static int k_adc_drv_enabled(struct k230_adc_regs *adc_regs)
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{
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rt_uint32_t reg;
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reg = readl(&adc_regs->trim_reg);
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reg |= 0x1;
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writel(reg, &adc_regs->trim_reg);
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return RT_EOK;
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}
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static int k_adc_drv_disabled(struct k230_adc_regs *adc_regs)
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{
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rt_uint32_t reg;
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reg = readl(&adc_regs->trim_reg);
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reg = reg & (~(0x1));
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writel(reg, &adc_regs->trim_reg);
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return RT_EOK;
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}
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rt_err_t k230_adc_enabled(struct rt_adc_device *device, rt_int8_t channel, rt_bool_t enabled)
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{
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if (channel >= ADC_MAX_CHANNEL)
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return -RT_ERROR;
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struct k230_adc *kd_adc = rt_container_of(device, struct k230_adc, dev);
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kd_adc->chn[channel].enabled = 1;
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if (enabled)
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{
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kd_adc->chn[channel].enabled = 1;
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}
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else
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{
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kd_adc->chn[channel].enabled = 0;
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}
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return RT_EOK;
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}
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rt_err_t k230_get_adc_value(struct rt_adc_device *device, rt_int8_t channel, rt_uint32_t *value)
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{
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if (channel >= ADC_MAX_CHANNEL)
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return -RT_ERROR;
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struct k230_adc *kd_adc = rt_container_of(device, struct k230_adc, dev);
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if (!kd_adc->chn[channel].enabled)
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return -RT_ERROR;
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writel(channel | 0x10, &kd_adc->adc_regs->cfg_reg);
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while ((readl(&kd_adc->adc_regs->cfg_reg) & 0x10000) == 0);
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*value = readl(&kd_adc->adc_regs->data_reg[channel]);
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return RT_EOK;
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}
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static const struct rt_adc_ops k230_adc_ops =
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{
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.enabled = k230_adc_enabled,
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.convert = k230_get_adc_value,
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};
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int rt_hw_adc_init(void)
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{
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k230_adc_init();
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rt_hw_adc_register(&adc_dev.dev, K230_ADC_NAME, &k230_adc_ops, NULL);
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return RT_EOK;
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}
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INIT_BOARD_EXPORT(rt_hw_adc_init);
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