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/*
* Copyright (c) 2021-2023 HPMicro
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <rtthread.h>
#ifdef BSP_USING_ADC
#include <rtdevice.h>
#include "board.h"
#include "drv_adc.h"
#ifdef BSP_USING_ADC12
#include "hpm_adc12_drv.h"
#endif
#ifdef BSP_USING_ADC16
#include "hpm_adc16_drv.h"
#endif
#include "hpm_sysctl_drv.h"
#if defined(BSP_USING_ADC16) && defined(ADC16_SOC_TEMP_CH_EN) && ADC16_SOC_TEMP_CH_EN
#define HPM_ADC16_HAS_TEMP_SENSOR (1)
#define HPM_ADC16_TEMP_SAMPLE_CYCLE (511U)
#else
#define HPM_ADC16_HAS_TEMP_SENSOR (0)
#endif
#ifndef BOARD_ADC_VREF_MV
#define BOARD_ADC_VREF_MV (3300)
#endif
typedef struct
{
char *adc_name;
struct rt_adc_device hpm_adc_device;
bool is_adc12;
bool adc_enabled;
uint32_t adc_base;
rt_atomic_t enabled_channels;
}hpm_rtt_adc;
#if defined(ADC12_SOC_MAX_CH_NUM)
extern uint32_t rtt_board_init_adc12_clock(ADC12_Type *ptr, bool clk_src_ahb);
#endif
extern uint32_t rtt_board_init_adc16_clock(ADC16_Type *ptr, bool clk_src_ahb);
static uint32_t hpm_adc_init_clock(struct rt_adc_device *device);
static void hpm_adc_init_pins(struct rt_adc_device *device);
static bool hpm_adc_get_channel(const hpm_rtt_adc *adc, rt_int8_t channel, uint8_t *adc_chn);
static rt_err_t hpm_adc_enabled(struct rt_adc_device *device, rt_int8_t channel, rt_bool_t enabled);
static rt_err_t hpm_get_adc_value(struct rt_adc_device *device, rt_int8_t channel, rt_uint32_t *value);
static rt_uint8_t hpm_get_resolution(struct rt_adc_device *device);
static rt_int16_t hpm_get_vref(struct rt_adc_device *device);
static const struct rt_adc_ops hpm_adc_ops =
{
.enabled = hpm_adc_enabled,
.convert = hpm_get_adc_value,
.get_resolution = hpm_get_resolution,
.get_vref = hpm_get_vref,
};
static hpm_rtt_adc hpm_adc_config_tbl[] =
{
#ifdef BSP_USING_ADC0
{
.adc_name = "adc0",
#ifdef BSP_USING_ADC12
.is_adc12 = true,
#else
.is_adc12 = false,
#endif
.adc_base = (uint32_t)HPM_ADC0,
},
#endif
#ifdef BSP_USING_ADC1
{
.adc_name = "adc1",
#ifdef BSP_USING_ADC12
.is_adc12 = true,
#else
.is_adc12 = false,
#endif
.adc_base = (uint32_t)HPM_ADC1,
},
#endif
#ifdef BSP_USING_ADC2
{
.adc_name = "adc2",
#ifdef BSP_USING_ADC12
.is_adc12 = true,
#else
.is_adc12 = false,
#endif
.adc_base = (uint32_t)HPM_ADC2,
},
#endif
#ifdef BSP_USING_ADC3
{
.adc_name = "adc3",
.is_adc12 = false,
.adc_base = (uint32_t)HPM_ADC3,
},
#endif
};
static uint8_t adc_nums = sizeof(hpm_adc_config_tbl) / sizeof(hpm_rtt_adc);
static bool hpm_adc_get_channel(const hpm_rtt_adc *adc, rt_int8_t channel, uint8_t *adc_chn)
{
RT_ASSERT(adc_chn != RT_NULL);
#if HPM_ADC16_HAS_TEMP_SENSOR
if (!adc->is_adc12 && channel == RT_ADC_INTERN_CH_TEMPER) {
*adc_chn = ADC16_SOC_TEMP_CH_NUM;
return true;
}
#endif
if (channel < 0) {
return false;
}
*adc_chn = (uint8_t)channel;
if (adc->is_adc12) {
#ifdef BSP_USING_ADC12
return !ADC12_IS_CHANNEL_INVALID(*adc_chn);
#else
return false;
#endif
}
#ifdef BSP_USING_ADC16
return !ADC16_IS_CHANNEL_INVALID(*adc_chn);
#else
return false;
#endif
}
static uint32_t hpm_adc_init_clock(struct rt_adc_device *device)
{
hpm_rtt_adc *hpm_adc;
uint32_t clock_freq = 0;
RT_ASSERT(device != RT_NULL);
hpm_adc = (hpm_rtt_adc *)device->parent.user_data;
#if defined(ADC12_SOC_MAX_CH_NUM)
if (hpm_adc->is_adc12)
{
clock_freq = rtt_board_init_adc12_clock((ADC12_Type *)hpm_adc->adc_base, true);
} else
#endif
{
clock_freq = rtt_board_init_adc16_clock((ADC16_Type*)hpm_adc->adc_base,true);
}
return clock_freq;
}
static void hpm_adc_init_pins(struct rt_adc_device *device)
{
hpm_rtt_adc *hpm_adc;
RT_ASSERT(device != RT_NULL);
hpm_adc = (hpm_rtt_adc *)device->parent.user_data;
#if defined(ADC12_SOC_MAX_CH_NUM)
if (hpm_adc->is_adc12)
{
board_init_adc12_pins();
} else
#endif
{
board_init_adc16_pins();
}
}
static rt_err_t init_adc_config(hpm_rtt_adc *adc)
{
hpm_stat_t ret;
if (adc->is_adc12) {
#ifdef BSP_USING_ADC12
adc12_config_t cfg;
adc12_get_default_config(&cfg);
cfg.res = adc12_res_12_bits;
cfg.conv_mode = adc12_conv_mode_oneshot;
cfg.adc_clk_div = 3;
cfg.wait_dis = false;
ret = adc12_init((ADC12_Type *)adc->adc_base, &cfg);
if (ret != status_success) {
return -RT_ERROR;
}
#endif
} else {
#ifdef BSP_USING_ADC16
adc16_config_t cfg;
adc16_get_default_config(&cfg);
cfg.conv_mode = adc16_conv_mode_oneshot;
cfg.res = adc16_res_16_bits;
cfg.adc_clk_div = 4;
#if !defined(HPM_IP_FEATURE_ADC16_FORCE_SYNC_AHB) || !HPM_IP_FEATURE_ADC16_FORCE_SYNC_AHB
cfg.sel_sync_ahb = true;
#endif
cfg.wait_dis = 0;
ret = adc16_init((ADC16_Type *)adc->adc_base, &cfg);
if (ret != status_success) {
return -RT_ERROR;
}
#endif
#if defined(ADC_SOC_BUSMODE_ENABLE_CTRL_SUPPORT) && ADC_SOC_BUSMODE_ENABLE_CTRL_SUPPORT
/* enable oneshot mode */
adc16_enable_oneshot_mode((ADC16_Type *)adc->adc_base);
#endif
}
return RT_EOK;
}
static rt_err_t init_channel_config(hpm_rtt_adc *adc, uint16_t channel)
{
hpm_stat_t ret;
if (adc->is_adc12) {
#ifdef BSP_USING_ADC12
adc12_channel_config_t ch_cfg;
adc12_get_channel_default_config(&ch_cfg);
ch_cfg.ch = channel;
ch_cfg.diff_sel = adc12_sample_signal_single_ended;
ch_cfg.sample_cycle = 20;
ret = adc12_init_channel((ADC12_Type *)adc->adc_base, &ch_cfg);
if (ret != status_success) {
return -RT_ERROR;
}
#endif
} else {
#ifdef BSP_USING_ADC16
adc16_channel_config_t ch_cfg;
adc16_get_channel_default_config(&ch_cfg);
ch_cfg.ch = channel;
#if HPM_ADC16_HAS_TEMP_SENSOR
if (channel == ADC16_SOC_TEMP_CH_NUM) {
ch_cfg.sample_cycle = HPM_ADC16_TEMP_SAMPLE_CYCLE;
} else
#endif
{
ch_cfg.sample_cycle = 20;
}
ret = adc16_init_channel((ADC16_Type *)adc->adc_base, &ch_cfg);
if (ret != status_success) {
return -RT_ERROR;
}
#if HPM_ADC16_HAS_TEMP_SENSOR
if (channel == ADC16_SOC_TEMP_CH_NUM) {
adc16_enable_temp_sensor((ADC16_Type *)adc->adc_base);
}
#endif
#endif
}
return RT_EOK;
}
static rt_err_t hpm_adc_enabled(struct rt_adc_device *device, rt_int8_t channel, rt_bool_t enabled)
{
hpm_rtt_adc *hpm_adc;
rt_err_t ret = RT_EOK;
rt_base_t critical_level;
rt_atomic_t channel_mask;
uint8_t adc_chn;
RT_ASSERT(device != RT_NULL);
hpm_adc = (hpm_rtt_adc *)device->parent.user_data;
if (!hpm_adc_get_channel(hpm_adc, channel, &adc_chn)) {
return -RT_EINVAL;
}
channel_mask = (rt_atomic_t)1U << adc_chn;
critical_level = rt_enter_critical();
if (enabled == RT_TRUE) {
if ((rt_atomic_load(&hpm_adc->enabled_channels) & channel_mask) == 0)
{
if (!hpm_adc->adc_enabled)
{
hpm_adc_init_pins(device);
(void)hpm_adc_init_clock(device);
ret = init_adc_config(hpm_adc);
if (ret != RT_EOK) {
goto exit;
}
hpm_adc->adc_enabled = true;
}
ret = init_channel_config(hpm_adc, adc_chn);
if (ret != RT_EOK) {
goto exit;
}
(void)rt_atomic_or(&hpm_adc->enabled_channels, channel_mask);
}
}
else
{
/* The hardware has no per-channel disable in oneshot mode. */
#if HPM_ADC16_HAS_TEMP_SENSOR
rt_atomic_t old_channels;
old_channels = rt_atomic_and(&hpm_adc->enabled_channels, ~channel_mask);
if (!hpm_adc->is_adc12 && adc_chn == ADC16_SOC_TEMP_CH_NUM
&& (old_channels & channel_mask) != 0) {
adc16_disable_temp_sensor((ADC16_Type *)hpm_adc->adc_base);
}
#else
(void)rt_atomic_and(&hpm_adc->enabled_channels, ~channel_mask);
#endif
}
exit:
rt_exit_critical_safe(critical_level);
return ret;
}
static rt_err_t hpm_get_adc_value(struct rt_adc_device *device, rt_int8_t channel, rt_uint32_t *value)
{
hpm_rtt_adc *hpm_adc;
hpm_stat_t status;
rt_uint16_t val;
uint8_t adc_chn;
RT_ASSERT(device != RT_NULL);
RT_ASSERT(value != RT_NULL);
hpm_adc = (hpm_rtt_adc *)device->parent.user_data;
if (!hpm_adc_get_channel(hpm_adc, channel, &adc_chn)) {
return -RT_EINVAL;
}
if ((rt_atomic_load(&hpm_adc->enabled_channels) & ((rt_atomic_t)1U << adc_chn)) == 0) {
return -RT_EINVAL;
}
if (hpm_adc->is_adc12) {
#ifdef BSP_USING_ADC12
status = adc12_get_oneshot_result((ADC12_Type *)hpm_adc->adc_base, adc_chn, &val);
#else
return -RT_ENOSYS;
#endif
} else {
#ifdef BSP_USING_ADC16
status = adc16_get_oneshot_result((ADC16_Type *)hpm_adc->adc_base, adc_chn, &val);
#else
return -RT_ENOSYS;
#endif
}
if (status != status_success) {
return -RT_ERROR;
}
*value = val;
return RT_EOK;
}
static rt_uint8_t hpm_get_resolution(struct rt_adc_device *device)
{
hpm_rtt_adc *hpm_adc;
RT_ASSERT(device != RT_NULL);
hpm_adc = (hpm_rtt_adc *)device->parent.user_data;
if (hpm_adc->is_adc12) {
return 12;
} else {
return 16;
}
}
static rt_int16_t hpm_get_vref(struct rt_adc_device *device)
{
RT_UNUSED(device);
return BOARD_ADC_VREF_MV;
}
int rt_hw_adc_init(void)
{
rt_err_t ret = RT_EOK;
for (uint32_t i = 0; i < adc_nums; i++) {
ret = rt_hw_adc_register(&hpm_adc_config_tbl[i].hpm_adc_device,
hpm_adc_config_tbl[i].adc_name,
&hpm_adc_ops,
&hpm_adc_config_tbl[i]);
if (ret != RT_EOK) {
ret = -RT_ERROR;
break;
}
}
return ret;
}
INIT_BOARD_EXPORT(rt_hw_adc_init);
#endif /* BSP_USING_ADC */
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