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zephyr/drivers/serial/uart_renesas_ra_sci.c

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/*
* Copyright (c) 2024 Renesas Electronics Corporation
*
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT renesas_ra_sci_uart
#include <zephyr/kernel.h>
#include <zephyr/drivers/uart.h>
#include <zephyr/drivers/pinctrl.h>
#include <zephyr/irq.h>
#include <soc.h>
#include "r_sci_uart.h"
#include "r_dtc.h"
#include <zephyr/logging/log.h>
LOG_MODULE_REGISTER(ra_sci_uart);
#define SCI_UART_SSR_FIFO_DR_RDF (R_SCI0_SSR_FIFO_DR_Msk | R_SCI0_SSR_FIFO_RDF_Msk)
#define SCI_UART_SSR_FIFO_TDFE_TEND (R_SCI0_SSR_FIFO_TDFE_Msk | R_SCI0_SSR_FIFO_TEND_Msk)
#define SCI_UART_SSR_TDRE_TEND (R_SCI0_SSR_TDRE_Msk | R_SCI0_SSR_TEND_Msk)
#define SCI_UART_SSR_ERR_MSK (R_SCI0_SSR_ORER_Msk | R_SCI0_SSR_FER_Msk | R_SCI0_SSR_PER_Msk)
#define SCI_UART_SSR_FIFO_ERR_MSK \
(R_SCI0_SSR_FIFO_ORER_Msk | R_SCI0_SSR_FIFO_FER_Msk | R_SCI0_SSR_FIFO_PER_Msk)
#if defined(CONFIG_UART_ASYNC_API)
void sci_uart_rxi_isr(void);
void sci_uart_txi_isr(void);
void sci_uart_tei_isr(void);
void sci_uart_eri_isr(void);
#endif
struct uart_ra_sci_config {
const struct pinctrl_dev_config *pcfg;
R_SCI0_Type * const regs;
};
struct uart_ra_sci_data {
const struct device *dev;
struct st_sci_uart_instance_ctrl sci;
struct uart_config uart_config;
struct st_uart_cfg fsp_config;
struct st_sci_uart_extended_cfg fsp_config_extend;
struct st_baud_setting_t fsp_baud_setting;
#if defined(CONFIG_UART_INTERRUPT_DRIVEN)
uart_irq_callback_user_data_t user_cb;
void *user_cb_data;
uint32_t ssr;
#endif
#if defined(CONFIG_UART_ASYNC_API)
uart_callback_t async_user_cb;
void *async_user_cb_data;
struct k_work_delayable rx_timeout_work;
size_t rx_timeout;
size_t rx_buf_len;
size_t rx_buf_offset;
size_t rx_buf_cap;
uint8_t *rx_buffer;
size_t rx_next_buf_cap;
uint8_t *rx_next_buf;
struct st_transfer_instance rx_transfer;
struct st_dtc_instance_ctrl rx_transfer_ctrl;
struct st_transfer_info rx_transfer_info;
struct st_transfer_cfg rx_transfer_cfg;
struct st_dtc_extended_cfg rx_transfer_cfg_extend;
struct k_work_delayable tx_timeout;
size_t tx_buf_cap;
struct st_transfer_instance tx_transfer;
struct st_dtc_instance_ctrl tx_transfer_ctrl;
struct st_transfer_info tx_transfer_info;
struct st_transfer_cfg tx_transfer_cfg;
struct st_dtc_extended_cfg tx_transfer_cfg_extend;
#endif
};
static int uart_ra_sci_poll_in(const struct device *dev, unsigned char *c)
{
struct uart_ra_sci_data *data = dev->data;
const struct uart_ra_sci_config *cfg = dev->config;
if (IS_ENABLED(CONFIG_UART_ASYNC_API) && cfg->regs->SCR_b.RIE) {
/* This function cannot be used if async reception was enabled */
return -EBUSY;
}
if (IS_ENABLED(CONFIG_UART_RA_SCI_UART_FIFO_ENABLE) && data->sci.fifo_depth > 0
? cfg->regs->FDR_b.R == 0U
: cfg->regs->SSR_b.RDRF == 0U) {
/* There are no characters available to read. */
return -1;
}
/* got a character */
*c = IS_ENABLED(CONFIG_UART_RA_SCI_UART_FIFO_ENABLE) && data->sci.fifo_depth > 0
? cfg->regs->FRDRL
: cfg->regs->RDR;
return 0;
}
static void uart_ra_sci_poll_out(const struct device *dev, unsigned char c)
{
struct uart_ra_sci_data *data = dev->data;
const struct uart_ra_sci_config *cfg = dev->config;
#if CONFIG_UART_RA_SCI_UART_FIFO_ENABLE
if (data->sci.fifo_depth > 0) {
while (cfg->regs->FDR_b.T > 0x8) {
}
cfg->regs->FTDRL = c;
} else
#endif
{
while (cfg->regs->SSR_b.TDRE == 0U) {
}
cfg->regs->TDR = c;
}
}
static int uart_ra_sci_err_check(const struct device *dev)
{
struct uart_ra_sci_data *data = dev->data;
const struct uart_ra_sci_config *cfg = dev->config;
int errors = 0;
#if CONFIG_UART_RA_SCI_UART_FIFO_ENABLE
if (data->sci.fifo_depth > 0) {
const uint8_t status = cfg->regs->SSR_FIFO;
uint8_t ssr_fifo = 0;
if (status & R_SCI0_SSR_FIFO_ORER_Msk) {
errors |= UART_ERROR_OVERRUN;
ssr_fifo |= R_SCI0_SSR_FIFO_ORER_Msk;
}
if (status & R_SCI0_SSR_FIFO_PER_Msk) {
errors |= UART_ERROR_PARITY;
ssr_fifo |= R_SCI0_SSR_FIFO_PER_Msk;
}
if (status & R_SCI0_SSR_FIFO_FER_Msk) {
errors |= UART_ERROR_FRAMING;
ssr_fifo |= R_SCI0_SSR_FIFO_FER_Msk;
}
cfg->regs->SSR_FIFO &= ~ssr_fifo;
} else
#endif
{
const uint8_t status = cfg->regs->SSR;
uint8_t ssr = 0;
if (status & R_SCI0_SSR_ORER_Msk) {
errors |= UART_ERROR_OVERRUN;
ssr |= R_SCI0_SSR_ORER_Msk;
}
if (status & R_SCI0_SSR_PER_Msk) {
errors |= UART_ERROR_PARITY;
ssr |= R_SCI0_SSR_PER_Msk;
}
if (status & R_SCI0_SSR_FER_Msk) {
errors |= UART_ERROR_FRAMING;
ssr |= R_SCI0_SSR_FER_Msk;
}
cfg->regs->SSR &= ~ssr;
}
return errors;
}
static int uart_ra_sci_apply_config(const struct uart_config *config,
struct st_uart_cfg *fsp_config,
struct st_sci_uart_extended_cfg *fsp_config_extend,
struct st_baud_setting_t *fsp_baud_setting)
{
fsp_err_t fsp_err;
fsp_err = R_SCI_UART_BaudCalculate(config->baudrate, true, 5000, fsp_baud_setting);
if (fsp_err != FSP_SUCCESS) {
LOG_DBG("drivers: uart: baud calculate error");
return -EINVAL;
}
switch (config->parity) {
case UART_CFG_PARITY_NONE:
fsp_config->parity = UART_PARITY_OFF;
break;
case UART_CFG_PARITY_ODD:
fsp_config->parity = UART_PARITY_ODD;
break;
case UART_CFG_PARITY_EVEN:
fsp_config->parity = UART_PARITY_EVEN;
break;
case UART_CFG_PARITY_MARK:
return -ENOTSUP;
case UART_CFG_PARITY_SPACE:
return -ENOTSUP;
default:
return -EINVAL;
}
switch (config->stop_bits) {
case UART_CFG_STOP_BITS_0_5:
return -ENOTSUP;
case UART_CFG_STOP_BITS_1:
fsp_config->stop_bits = UART_STOP_BITS_1;
break;
case UART_CFG_STOP_BITS_1_5:
return -ENOTSUP;
case UART_CFG_STOP_BITS_2:
fsp_config->stop_bits = UART_STOP_BITS_2;
break;
default:
return -EINVAL;
}
switch (config->data_bits) {
case UART_CFG_DATA_BITS_5:
return -ENOTSUP;
case UART_CFG_DATA_BITS_6:
return -ENOTSUP;
case UART_CFG_DATA_BITS_7:
fsp_config->data_bits = UART_DATA_BITS_7;
break;
case UART_CFG_DATA_BITS_8:
fsp_config->data_bits = UART_DATA_BITS_8;
break;
case UART_CFG_DATA_BITS_9:
fsp_config->data_bits = UART_DATA_BITS_9;
break;
default:
return -EINVAL;
}
#if CONFIG_UART_RA_SCI_UART_FIFO_ENABLE
fsp_config_extend->rx_fifo_trigger = 0x8;
#endif
switch (config->flow_ctrl) {
case UART_CFG_FLOW_CTRL_NONE:
fsp_config_extend->flow_control = 0;
fsp_config_extend->rs485_setting.enable = false;
break;
case UART_CFG_FLOW_CTRL_RTS_CTS:
fsp_config_extend->flow_control = SCI_UART_FLOW_CONTROL_HARDWARE_CTSRTS;
fsp_config_extend->rs485_setting.enable = false;
break;
case UART_CFG_FLOW_CTRL_DTR_DSR:
return -ENOTSUP;
case UART_CFG_FLOW_CTRL_RS485:
/* TODO: implement this config */
return -ENOTSUP;
default:
return -EINVAL;
}
return 0;
}
#ifdef CONFIG_UART_USE_RUNTIME_CONFIGURE
static int uart_ra_sci_configure(const struct device *dev, const struct uart_config *config)
{
int err;
fsp_err_t fsp_err;
struct uart_ra_sci_data *data = dev->data;
err = uart_ra_sci_apply_config(config, &data->fsp_config, &data->fsp_config_extend,
&data->fsp_baud_setting);
if (err) {
return err;
}
fsp_err = R_SCI_UART_Close(&data->sci);
fsp_err |= R_SCI_UART_Open(&data->sci, &data->fsp_config);
if (fsp_err != FSP_SUCCESS) {
LOG_DBG("drivers: serial: uart configure failed");
return -EIO;
}
memcpy(&data->uart_config, config, sizeof(*config));
return 0;
}
static int uart_ra_sci_config_get(const struct device *dev, struct uart_config *cfg)
{
struct uart_ra_sci_data *data = dev->data;
memcpy(cfg, &data->uart_config, sizeof(*cfg));
return 0;
}
#endif /* CONFIG_UART_USE_RUNTIME_CONFIGURE */
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
static int uart_ra_sci_fifo_fill(const struct device *dev, const uint8_t *tx_data, int size)
{
struct uart_ra_sci_data *data = dev->data;
const struct uart_ra_sci_config *cfg = dev->config;
uint8_t num_tx = 0U;
#if CONFIG_UART_RA_SCI_UART_FIFO_ENABLE
if (data->sci.fifo_depth != 0) {
while ((size - num_tx > 0) && cfg->regs->FDR_b.T < data->sci.fifo_depth) {
/* Send a character (8bit , parity none) */
cfg->regs->FTDRL = tx_data[num_tx++];
}
cfg->regs->SSR_FIFO &= (uint8_t)~SCI_UART_SSR_FIFO_TDFE_TEND;
} else
#endif
{
if (size > 0 && cfg->regs->SSR_b.TDRE) {
/* Send a character (8bit , parity none) */
cfg->regs->TDR = tx_data[num_tx++];
}
};
return num_tx;
}
static int uart_ra_sci_fifo_read(const struct device *dev, uint8_t *rx_data, const int size)
{
struct uart_ra_sci_data *data = dev->data;
const struct uart_ra_sci_config *cfg = dev->config;
uint8_t num_rx = 0U;
#if CONFIG_UART_RA_SCI_UART_FIFO_ENABLE
if (data->sci.fifo_depth != 0) {
while ((size - num_rx > 0) && cfg->regs->FDR_b.R > 0) {
/* Receive a character (8bit , parity none) */
rx_data[num_rx++] = cfg->regs->FRDRL;
}
cfg->regs->SSR_FIFO &= (uint8_t)~SCI_UART_SSR_FIFO_DR_RDF;
} else
#endif
{
if (size > 0 && cfg->regs->SSR_b.RDRF) {
/* Receive a character (8bit , parity none) */
rx_data[num_rx++] = cfg->regs->RDR;
}
cfg->regs->SSR &= (uint8_t)~R_SCI0_SSR_RDRF_Msk;
}
return num_rx;
}
static void uart_ra_sci_irq_tx_enable(const struct device *dev)
{
struct uart_ra_sci_data *data = dev->data;
const struct uart_ra_sci_config *cfg = dev->config;
#if CONFIG_UART_RA_SCI_UART_FIFO_ENABLE
if (data->sci.fifo_depth != 0) {
cfg->regs->SSR_FIFO &= (uint8_t)~SCI_UART_SSR_FIFO_TDFE_TEND;
} else
#endif
{
cfg->regs->SSR = (uint8_t)~SCI_UART_SSR_TDRE_TEND;
}
cfg->regs->SCR |= (R_SCI0_SCR_TIE_Msk | R_SCI0_SCR_TEIE_Msk);
}
static void uart_ra_sci_irq_tx_disable(const struct device *dev)
{
const struct uart_ra_sci_config *cfg = dev->config;
cfg->regs->SCR &= ~(R_SCI0_SCR_TIE_Msk | R_SCI0_SCR_TEIE_Msk);
}
static int uart_ra_sci_irq_tx_ready(const struct device *dev)
{
struct uart_ra_sci_data *data = dev->data;
const struct uart_ra_sci_config *cfg = dev->config;
int ret;
#if CONFIG_UART_RA_SCI_UART_FIFO_ENABLE
if (data->sci.fifo_depth != 0) {
ret = (cfg->regs->SCR_b.TIE == 1U) && (data->ssr & R_SCI0_SSR_FIFO_TDFE_Msk);
} else
#endif
{
ret = (cfg->regs->SCR_b.TIE == 1U) && (data->ssr & R_SCI0_SSR_TDRE_Msk);
}
return ret;
}
static int uart_ra_sci_irq_tx_complete(const struct device *dev)
{
struct uart_ra_sci_data *data = dev->data;
const struct uart_ra_sci_config *cfg = dev->config;
return (cfg->regs->SCR_b.TEIE == 1U) && (data->ssr & BIT(R_SCI0_SSR_TEND_Pos));
}
static void uart_ra_sci_irq_rx_enable(const struct device *dev)
{
struct uart_ra_sci_data *data = dev->data;
const struct uart_ra_sci_config *cfg = dev->config;
#if CONFIG_UART_RA_SCI_UART_FIFO_ENABLE
if (data->sci.fifo_depth != 0) {
cfg->regs->SSR_FIFO &= (uint8_t) ~(SCI_UART_SSR_FIFO_DR_RDF);
} else
#endif
{
cfg->regs->SSR_b.RDRF = 0U;
}
cfg->regs->SCR_b.RIE = 1U;
}
static void uart_ra_sci_irq_rx_disable(const struct device *dev)
{
const struct uart_ra_sci_config *cfg = dev->config;
cfg->regs->SCR_b.RIE = 0U;
}
static int uart_ra_sci_irq_rx_ready(const struct device *dev)
{
struct uart_ra_sci_data *data = dev->data;
const struct uart_ra_sci_config *cfg = dev->config;
int ret;
#if CONFIG_UART_RA_SCI_UART_FIFO_ENABLE
if (data->sci.fifo_depth != 0) {
ret = (cfg->regs->SCR_b.RIE == 1U) && (data->ssr & SCI_UART_SSR_FIFO_DR_RDF);
} else
#endif
{
ret = (cfg->regs->SCR_b.RIE == 1U) && (data->ssr & R_SCI0_SSR_RDRF_Msk);
}
return ret;
}
static void uart_ra_sci_irq_err_enable(const struct device *dev)
{
struct uart_ra_sci_data *data = dev->data;
NVIC_EnableIRQ(data->fsp_config.eri_irq);
}
static void uart_ra_sci_irq_err_disable(const struct device *dev)
{
struct uart_ra_sci_data *data = dev->data;
NVIC_DisableIRQ(data->fsp_config.eri_irq);
}
static int uart_ra_sci_irq_is_pending(const struct device *dev)
{
struct uart_ra_sci_data *data = dev->data;
const struct uart_ra_sci_config *cfg = dev->config;
uint8_t scr;
uint8_t ssr;
int ret;
#if CONFIG_UART_RA_SCI_UART_FIFO_ENABLE
if (data->sci.fifo_depth != 0) {
scr = cfg->regs->SCR;
ssr = cfg->regs->SSR_FIFO;
ret = ((scr & R_SCI0_SCR_TIE_Msk) &&
(ssr & (R_SCI0_SSR_FIFO_TEND_Msk | R_SCI0_SSR_FIFO_TDFE_Msk))) ||
((scr & R_SCI0_SCR_RIE_Msk) &&
((ssr & (R_SCI0_SSR_FIFO_RDF_Msk | R_SCI0_SSR_FIFO_DR_Msk |
R_SCI0_SSR_FIFO_FER_Msk | R_SCI0_SSR_FIFO_ORER_Msk |
R_SCI0_SSR_FIFO_PER_Msk))));
} else
#endif
{
scr = cfg->regs->SCR;
ssr = cfg->regs->SSR;
ret = ((scr & R_SCI0_SCR_TIE_Msk) &&
(ssr & (R_SCI0_SSR_TEND_Msk | R_SCI0_SSR_TDRE_Msk))) ||
((scr & R_SCI0_SCR_RIE_Msk) &&
(ssr & (R_SCI0_SSR_RDRF_Msk | R_SCI0_SSR_PER_Msk | R_SCI0_SSR_FER_Msk |
R_SCI0_SSR_ORER_Msk)));
}
return ret;
}
static int uart_ra_sci_irq_update(const struct device *dev)
{
struct uart_ra_sci_data *data = dev->data;
const struct uart_ra_sci_config *cfg = dev->config;
#if CONFIG_UART_RA_SCI_UART_FIFO_ENABLE
if (data->sci.fifo_depth != 0) {
data->ssr = cfg->regs->SSR_FIFO;
uint8_t ssr = data->ssr ^ (R_SCI0_SSR_FIFO_ORER_Msk | R_SCI0_SSR_FIFO_FER_Msk |
R_SCI0_SSR_FIFO_PER_Msk);
cfg->regs->SSR_FIFO &= ssr;
} else
#endif
{
data->ssr = cfg->regs->SSR;
uint8_t ssr =
data->ssr ^ (R_SCI0_SSR_ORER_Msk | R_SCI0_SSR_FER_Msk | R_SCI0_SSR_PER_Msk);
cfg->regs->SSR_FIFO &= ssr;
}
return 1;
}
static void uart_ra_sci_irq_callback_set(const struct device *dev, uart_irq_callback_user_data_t cb,
void *cb_data)
{
struct uart_ra_sci_data *data = dev->data;
data->user_cb = cb;
data->user_cb_data = cb_data;
#if CONFIG_UART_EXCLUSIVE_API_CALLBACKS
data->async_user_cb = NULL;
data->async_user_cb_data = NULL;
#endif
}
#endif /* CONFIG_UART_INTERRUPT_DRIVEN */
#ifdef CONFIG_UART_ASYNC_API
static int fsp_err_to_errno(fsp_err_t fsp_err)
{
switch (fsp_err) {
case FSP_ERR_INVALID_ARGUMENT:
return -EINVAL;
case FSP_ERR_NOT_OPEN:
return -EIO;
case FSP_ERR_IN_USE:
return -EBUSY;
case FSP_ERR_UNSUPPORTED:
return -ENOTSUP;
case 0:
return 0;
default:
return -EINVAL;
}
}
static int uart_ra_sci_async_callback_set(const struct device *dev, uart_callback_t cb,
void *cb_data)
{
struct uart_ra_sci_data *data = dev->data;
data->async_user_cb = cb;
data->async_user_cb_data = cb_data;
#if CONFIG_UART_EXCLUSIVE_API_CALLBACKS
data->user_cb = NULL;
data->user_cb_data = NULL;
#endif
return 0;
}
static int uart_ra_sci_async_tx(const struct device *dev, const uint8_t *buf, size_t len,
int32_t timeout)
{
struct uart_ra_sci_data *data = dev->data;
int err;
err = fsp_err_to_errno(R_SCI_UART_Write(&data->sci, buf, len));
if (err) {
return err;
}
data->tx_buf_cap = len;
if (timeout != SYS_FOREVER_US && timeout != 0) {
k_work_reschedule(&data->tx_timeout, Z_TIMEOUT_US(timeout));
}
return 0;
}
static inline void async_user_callback(const struct device *dev, struct uart_event *event)
{
struct uart_ra_sci_data *data = dev->data;
if (data->async_user_cb) {
data->async_user_cb(dev, event, data->async_user_cb_data);
}
}
static inline void async_rx_release_buf(const struct device *dev)
{
struct uart_ra_sci_data *data = dev->data;
struct uart_event event = {
.type = UART_RX_BUF_RELEASED,
.data.rx.buf = (uint8_t *)data->rx_buffer,
};
async_user_callback(dev, &event);
data->rx_buffer = NULL;
data->rx_buf_offset = 0;
data->rx_buf_len = 0;
data->rx_buf_cap = 0;
}
static inline void async_rx_release_next_buf(const struct device *dev)
{
struct uart_ra_sci_data *data = dev->data;
struct uart_event event = {
.type = UART_RX_BUF_RELEASED,
.data.rx.buf = (uint8_t *)data->rx_next_buf,
};
async_user_callback(dev, &event);
data->rx_next_buf = NULL;
}
static inline void async_rx_req_buf(const struct device *dev)
{
struct uart_event event = {
.type = UART_RX_BUF_REQUEST,
};
async_user_callback(dev, &event);
}
static inline void async_rx_disable(const struct device *dev)
{
struct uart_ra_sci_data *data = dev->data;
const struct uart_ra_sci_config *cfg = dev->config;
struct uart_event event = {
.type = UART_RX_DISABLED,
};
async_user_callback(dev, &event);
/* Disable the RXI request and clear the status flag to be ready for the next reception */
cfg->regs->SCR_b.RIE = 0;
#if CONFIG_UART_RA_SCI_UART_FIFO_ENABLE
if (data->sci.fifo_depth != 0) {
cfg->regs->SSR_FIFO &= (uint8_t)~SCI_UART_SSR_FIFO_DR_RDF;
} else
#endif
{
cfg->regs->SSR_b.RDRF = 0;
}
}
static inline void async_rx_ready(const struct device *dev)
{
struct uart_ra_sci_data *data = dev->data;
if (!data->rx_buf_len) {
return;
}
struct uart_event event = {
.type = UART_RX_RDY,
.data.rx.buf = (uint8_t *)data->rx_buffer,
.data.rx.offset = data->rx_buf_offset,
.data.rx.len = data->rx_buf_len,
};
async_user_callback(data->dev, &event);
data->rx_buf_offset += data->rx_buf_len;
data->rx_buf_len = 0;
}
static inline void disable_tx(const struct device *dev)
{
struct uart_ra_sci_data *data = dev->data;
const struct uart_ra_sci_config *cfg = dev->config;
/* Transmit interrupts must be disabled to start with. */
cfg->regs->SCR &= (uint8_t) ~(R_SCI0_SCR_TIE_Msk | R_SCI0_SCR_TEIE_Msk);
/*
* Make sure no transmission is in progress. Setting CCR0_b.TE to 0 when CSR_b.TEND
* is 0 causes SCI peripheral to work abnormally.
*/
while (IS_ENABLED(CONFIG_UART_RA_SCI_UART_FIFO_ENABLE) && data->sci.fifo_depth
? cfg->regs->SSR_FIFO_b.TEND != 1U
: cfg->regs->SSR_b.TEND != 1U) {
}
cfg->regs->SCR_b.TE = 0;
}
static inline void enable_tx(const struct device *dev)
{
const struct uart_ra_sci_config *cfg = dev->config;
cfg->regs->SCR_b.TE = 1;
}
static int uart_ra_sci_async_tx_abort(const struct device *dev)
{
struct uart_ra_sci_data *data = dev->data;
int err = 0;
if (!data->sci.p_tx_src) {
return -EFAULT;
}
disable_tx(dev);
if (FSP_SUCCESS != R_SCI_UART_Abort(&data->sci, UART_DIR_TX)) {
LOG_DBG("drivers: serial: uart abort tx failed");
err = -EIO;
goto unlock;
}
transfer_properties_t tx_properties = {0};
if (FSP_SUCCESS != R_DTC_InfoGet(data->tx_transfer.p_ctrl, &tx_properties)) {
LOG_DBG("drivers: serial: uart abort tx failed");
err = -EIO;
goto unlock;
}
struct uart_event event = {
.type = UART_TX_ABORTED,
.data.tx.buf = (uint8_t *)data->sci.p_tx_src,
.data.tx.len = data->tx_buf_cap - tx_properties.transfer_length_remaining,
};
async_user_callback(dev, &event);
k_work_cancel_delayable(&data->tx_timeout);
unlock:
enable_tx(dev);
return err;
}
static int uart_ra_sci_async_rx_enable(const struct device *dev, uint8_t *buf, size_t len,
int32_t timeout)
{
struct uart_ra_sci_data *data = dev->data;
const struct uart_ra_sci_config *cfg = dev->config;
int err = 0;
unsigned int key = irq_lock();
if (data->rx_buffer) {
err = -EAGAIN;
goto unlock;
}
#if CONFIG_UART_RA_SCI_UART_FIFO_ENABLE
if (data->sci.fifo_depth) {
cfg->regs->SSR_FIFO &= (uint8_t) ~(SCI_UART_SSR_FIFO_ERR_MSK);
} else
#endif
{
cfg->regs->SSR = (uint8_t)~SCI_UART_SSR_ERR_MSK;
}
err = fsp_err_to_errno(R_SCI_UART_Read(&data->sci, buf, len));
if (err) {
goto unlock;
}
data->rx_timeout = timeout;
data->rx_buffer = buf;
data->rx_buf_cap = len;
data->rx_buf_len = 0;
data->rx_buf_offset = 0;
/* Call buffer request user callback */
async_rx_req_buf(dev);
cfg->regs->SCR_b.RIE = 1;
unlock:
irq_unlock(key);
return err;
}
static int uart_ra_sci_async_rx_buf_rsp(const struct device *dev, uint8_t *buf, size_t len)
{
struct uart_ra_sci_data *data = dev->data;
data->rx_next_buf = buf;
data->rx_next_buf_cap = len;
return 0;
}
static int uart_ra_sci_async_rx_disable(const struct device *dev)
{
struct uart_ra_sci_data *data = dev->data;
uint32_t remaining_byte = 0;
int err = 0;
unsigned int key = irq_lock();
if (!data->rx_buffer) {
err = -EAGAIN;
goto unlock;
}
k_work_cancel_delayable(&data->rx_timeout_work);
if (FSP_SUCCESS != R_SCI_UART_ReadStop(&data->sci, &remaining_byte)) {
LOG_DBG("drivers: serial: uart stop reading failed");
err = -EIO;
goto unlock;
}
async_rx_ready(dev);
async_rx_release_buf(dev);
async_rx_release_next_buf(dev);
async_rx_disable(dev);
unlock:
irq_unlock(key);
return err;
}
static inline void async_evt_rx_err(const struct device *dev, enum uart_rx_stop_reason reason)
{
struct uart_ra_sci_data *data = dev->data;
k_work_cancel_delayable(&data->rx_timeout_work);
struct uart_event event = {
.type = UART_RX_STOPPED,
.data.rx_stop.reason = reason,
.data.rx_stop.data.buf = (uint8_t *)data->sci.p_rx_dest,
.data.rx_stop.data.offset = 0,
.data.rx_stop.data.len =
data->rx_buf_cap - data->rx_buf_offset - data->sci.rx_dest_bytes,
};
async_user_callback(dev, &event);
}
static inline void async_evt_rx_complete(const struct device *dev)
{
struct uart_ra_sci_data *data = dev->data;
unsigned int key = irq_lock();
async_rx_ready(dev);
async_rx_release_buf(dev);
if (data->rx_next_buf) {
data->rx_buffer = data->rx_next_buf;
data->rx_buf_offset = 0;
data->rx_buf_cap = data->rx_next_buf_cap;
data->rx_next_buf = NULL;
R_SCI_UART_Read(&data->sci, data->rx_buffer, data->rx_buf_cap);
async_rx_req_buf(dev);
} else {
async_rx_disable(dev);
}
irq_unlock(key);
}
static inline void async_evt_tx_done(const struct device *dev)
{
struct uart_ra_sci_data *data = dev->data;
k_work_cancel_delayable(&data->tx_timeout);
struct uart_event event = {
.type = UART_TX_DONE,
.data.tx.buf = (uint8_t *)data->sci.p_tx_src,
.data.tx.len = data->tx_buf_cap,
};
async_user_callback(dev, &event);
}
static void uart_ra_sci_callback_adapter(struct st_uart_callback_arg *fsp_args)
{
const struct device *dev = fsp_args->p_context;
switch (fsp_args->event) {
case UART_EVENT_TX_COMPLETE:
return async_evt_tx_done(dev);
case UART_EVENT_RX_COMPLETE:
async_evt_rx_complete(dev);
case UART_EVENT_ERR_PARITY:
return async_evt_rx_err(dev, UART_ERROR_PARITY);
case UART_EVENT_ERR_FRAMING:
return async_evt_rx_err(dev, UART_ERROR_FRAMING);
case UART_EVENT_ERR_OVERFLOW:
return async_evt_rx_err(dev, UART_ERROR_OVERRUN);
case UART_EVENT_BREAK_DETECT:
return async_evt_rx_err(dev, UART_BREAK);
case UART_EVENT_TX_DATA_EMPTY:
case UART_EVENT_RX_CHAR:
break;
}
}
static void uart_ra_sci_rx_timeout_handler(struct k_work *work)
{
struct k_work_delayable *dwork = k_work_delayable_from_work(work);
struct uart_ra_sci_data *data =
CONTAINER_OF(dwork, struct uart_ra_sci_data, rx_timeout_work);
unsigned int key = irq_lock();
async_rx_ready(data->dev);
irq_unlock(key);
}
static void uart_ra_sci_tx_timeout_handler(struct k_work *work)
{
struct k_work_delayable *dwork = k_work_delayable_from_work(work);
struct uart_ra_sci_data *data = CONTAINER_OF(dwork, struct uart_ra_sci_data, tx_timeout);
uart_ra_sci_async_tx_abort(data->dev);
}
#endif /* CONFIG_UART_ASYNC_API */
static const struct uart_driver_api uart_ra_sci_driver_api = {
.poll_in = uart_ra_sci_poll_in,
.poll_out = uart_ra_sci_poll_out,
.err_check = uart_ra_sci_err_check,
#ifdef CONFIG_UART_USE_RUNTIME_CONFIGURE
.configure = uart_ra_sci_configure,
.config_get = uart_ra_sci_config_get,
#endif
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
.fifo_fill = uart_ra_sci_fifo_fill,
.fifo_read = uart_ra_sci_fifo_read,
.irq_tx_enable = uart_ra_sci_irq_tx_enable,
.irq_tx_disable = uart_ra_sci_irq_tx_disable,
.irq_tx_ready = uart_ra_sci_irq_tx_ready,
.irq_rx_enable = uart_ra_sci_irq_rx_enable,
.irq_rx_disable = uart_ra_sci_irq_rx_disable,
.irq_tx_complete = uart_ra_sci_irq_tx_complete,
.irq_rx_ready = uart_ra_sci_irq_rx_ready,
.irq_err_enable = uart_ra_sci_irq_err_enable,
.irq_err_disable = uart_ra_sci_irq_err_disable,
.irq_is_pending = uart_ra_sci_irq_is_pending,
.irq_update = uart_ra_sci_irq_update,
.irq_callback_set = uart_ra_sci_irq_callback_set,
#endif /* CONFIG_UART_INTERRUPT_DRIVEN */
#if CONFIG_UART_ASYNC_API
.callback_set = uart_ra_sci_async_callback_set,
.tx = uart_ra_sci_async_tx,
.tx_abort = uart_ra_sci_async_tx_abort,
.rx_enable = uart_ra_sci_async_rx_enable,
.rx_buf_rsp = uart_ra_sci_async_rx_buf_rsp,
.rx_disable = uart_ra_sci_async_rx_disable,
#endif /* CONFIG_UART_ASYNC_API */
};
static int uart_ra_sci_init(const struct device *dev)
{
const struct uart_ra_sci_config *config = dev->config;
struct uart_ra_sci_data *data = dev->data;
int ret;
fsp_err_t fsp_err;
/* Configure dt provided device signals when available */
ret = pinctrl_apply_state(config->pcfg, PINCTRL_STATE_DEFAULT);
if (ret < 0) {
return ret;
}
/* Setup fsp sci_uart setting */
ret = uart_ra_sci_apply_config(&data->uart_config, &data->fsp_config,
&data->fsp_config_extend, &data->fsp_baud_setting);
if (ret != 0) {
return ret;
}
data->fsp_config_extend.p_baud_setting = &data->fsp_baud_setting;
#if defined(CONFIG_UART_ASYNC_API)
data->fsp_config.p_callback = uart_ra_sci_callback_adapter;
data->fsp_config.p_context = dev;
k_work_init_delayable(&data->tx_timeout, uart_ra_sci_tx_timeout_handler);
k_work_init_delayable(&data->rx_timeout_work, uart_ra_sci_rx_timeout_handler);
#endif /* defined(CONFIG_UART_ASYNC_API) */
data->fsp_config.p_extend = &data->fsp_config_extend;
fsp_err = R_SCI_UART_Open(&data->sci, &data->fsp_config);
if (fsp_err != FSP_SUCCESS) {
LOG_DBG("drivers: uart: initialize failed");
return -EIO;
}
irq_disable(data->fsp_config.eri_irq);
return 0;
}
#if CONFIG_UART_INTERRUPT_DRIVEN || CONFIG_UART_ASYNC_API
static void uart_ra_sci_rxi_isr(const struct device *dev)
{
struct uart_ra_sci_data *data = dev->data;
#if defined(CONFIG_UART_INTERRUPT_DRIVEN)
if (data->user_cb != NULL) {
data->user_cb(dev, data->user_cb_data);
goto out;
}
#endif
#if defined(CONFIG_UART_ASYNC_API)
if (data->rx_timeout != SYS_FOREVER_US && data->rx_timeout != 0) {
k_work_reschedule(&data->rx_timeout_work, Z_TIMEOUT_US(data->rx_timeout));
}
data->rx_buf_len++;
if (data->rx_buf_len + data->rx_buf_offset == data->rx_buf_cap) {
sci_uart_rxi_isr();
} else {
goto out;
}
#endif
out:
R_ICU->IELSR_b[data->fsp_config.rxi_irq].IR = 0U;
}
static void uart_ra_sci_txi_isr(const struct device *dev)
{
#if defined(CONFIG_UART_INTERRUPT_DRIVEN)
struct uart_ra_sci_data *data = dev->data;
if (data->user_cb != NULL) {
data->user_cb(dev, data->user_cb_data);
R_ICU->IELSR_b[data->fsp_config.txi_irq].IR = 0U;
return;
}
#endif
#if defined(CONFIG_UART_ASYNC_API)
sci_uart_txi_isr();
#endif
}
static void uart_ra_sci_tei_isr(const struct device *dev)
{
#if defined(CONFIG_UART_INTERRUPT_DRIVEN)
struct uart_ra_sci_data *data = dev->data;
if (data->user_cb != NULL) {
data->user_cb(dev, data->user_cb_data);
R_ICU->IELSR_b[data->fsp_config.tei_irq].IR = 0U;
return;
}
#endif
#if defined(CONFIG_UART_ASYNC_API)
sci_uart_tei_isr();
#endif
}
static void uart_ra_sci_eri_isr(const struct device *dev)
{
#if defined(CONFIG_UART_INTERRUPT_DRIVEN)
struct uart_ra_sci_data *data = dev->data;
if (data->user_cb != NULL) {
data->user_cb(dev, data->user_cb_data);
R_ICU->IELSR_b[data->fsp_config.eri_irq].IR = 0U;
return;
}
#endif
#if defined(CONFIG_UART_ASYNC_API)
sci_uart_eri_isr();
#endif
}
#endif
#define _ELC_EVENT_SCI_RXI(channel) ELC_EVENT_SCI##channel##_RXI
#define _ELC_EVENT_SCI_TXI(channel) ELC_EVENT_SCI##channel##_TXI
#define _ELC_EVENT_SCI_TEI(channel) ELC_EVENT_SCI##channel##_TEI
#define _ELC_EVENT_SCI_ERI(channel) ELC_EVENT_SCI##channel##_ERI
#define ELC_EVENT_SCI_RXI(channel) _ELC_EVENT_SCI_RXI(channel)
#define ELC_EVENT_SCI_TXI(channel) _ELC_EVENT_SCI_TXI(channel)
#define ELC_EVENT_SCI_TEI(channel) _ELC_EVENT_SCI_TEI(channel)
#define ELC_EVENT_SCI_ERI(channel) _ELC_EVENT_SCI_ERI(channel)
#if CONFIG_UART_ASYNC_API
#define UART_RA_SCI_ASYNC_INIT(index) \
.rx_transfer_info = \
{ \
.transfer_settings_word_b.dest_addr_mode = TRANSFER_ADDR_MODE_INCREMENTED, \
.transfer_settings_word_b.repeat_area = TRANSFER_REPEAT_AREA_DESTINATION, \
.transfer_settings_word_b.irq = TRANSFER_IRQ_EACH, \
.transfer_settings_word_b.chain_mode = TRANSFER_CHAIN_MODE_DISABLED, \
.transfer_settings_word_b.src_addr_mode = TRANSFER_ADDR_MODE_FIXED, \
.transfer_settings_word_b.size = TRANSFER_SIZE_1_BYTE, \
.transfer_settings_word_b.mode = TRANSFER_MODE_NORMAL, \
.p_dest = (void *)NULL, \
.p_src = (void const *)NULL, \
.num_blocks = 0, \
.length = 0, \
}, \
.rx_transfer_cfg_extend = {.activation_source = \
DT_IRQ_BY_NAME(DT_INST_PARENT(index), rxi, irq)}, \
.rx_transfer_cfg = \
{ \
.p_info = &uart_ra_sci_data_##index.rx_transfer_info, \
.p_extend = &uart_ra_sci_data_##index.rx_transfer_cfg_extend, \
}, \
.rx_transfer = \
{ \
.p_ctrl = &uart_ra_sci_data_##index.rx_transfer_ctrl, \
.p_cfg = &uart_ra_sci_data_##index.rx_transfer_cfg, \
.p_api = &g_transfer_on_dtc, \
}, \
.tx_transfer_info = \
{ \
.transfer_settings_word_b.dest_addr_mode = TRANSFER_ADDR_MODE_FIXED, \
.transfer_settings_word_b.repeat_area = TRANSFER_REPEAT_AREA_SOURCE, \
.transfer_settings_word_b.irq = TRANSFER_IRQ_END, \
.transfer_settings_word_b.chain_mode = TRANSFER_CHAIN_MODE_DISABLED, \
.transfer_settings_word_b.src_addr_mode = TRANSFER_ADDR_MODE_INCREMENTED, \
.transfer_settings_word_b.size = TRANSFER_SIZE_1_BYTE, \
.transfer_settings_word_b.mode = TRANSFER_MODE_NORMAL, \
.p_dest = (void *)NULL, \
.p_src = (void const *)NULL, \
.num_blocks = 0, \
.length = 0, \
}, \
.tx_transfer_cfg_extend = {.activation_source = \
DT_IRQ_BY_NAME(DT_INST_PARENT(index), txi, irq)}, \
.tx_transfer_cfg = \
{ \
.p_info = &uart_ra_sci_data_##index.tx_transfer_info, \
.p_extend = &uart_ra_sci_data_##index.tx_transfer_cfg_extend, \
}, \
.tx_transfer = { \
.p_ctrl = &uart_ra_sci_data_##index.tx_transfer_ctrl, \
.p_cfg = &uart_ra_sci_data_##index.tx_transfer_cfg, \
.p_api = &g_transfer_on_dtc, \
},
#define UART_RA_SCI_DTC_INIT(index) \
{ \
uart_ra_sci_data_##index.fsp_config.p_transfer_rx = \
&uart_ra_sci_data_##index.rx_transfer; \
uart_ra_sci_data_##index.fsp_config.p_transfer_tx = \
&uart_ra_sci_data_##index.tx_transfer; \
}
#else
#define UART_RA_SCI_ASYNC_INIT(index)
#define UART_RA_SCI_DTC_INIT(index)
#endif
#if CONFIG_UART_INTERRUPT_DRIVEN || CONFIG_UART_ASYNC_API
#define UART_RA_SCI_IRQ_INIT(index) \
{ \
R_ICU->IELSR[DT_IRQ_BY_NAME(DT_INST_PARENT(index), rxi, irq)] = \
ELC_EVENT_SCI_RXI(DT_INST_PROP(index, channel)); \
R_ICU->IELSR[DT_IRQ_BY_NAME(DT_INST_PARENT(index), txi, irq)] = \
ELC_EVENT_SCI_TXI(DT_INST_PROP(index, channel)); \
R_ICU->IELSR[DT_IRQ_BY_NAME(DT_INST_PARENT(index), tei, irq)] = \
ELC_EVENT_SCI_TEI(DT_INST_PROP(index, channel)); \
R_ICU->IELSR[DT_IRQ_BY_NAME(DT_INST_PARENT(index), eri, irq)] = \
ELC_EVENT_SCI_ERI(DT_INST_PROP(index, channel)); \
\
IRQ_CONNECT(DT_IRQ_BY_NAME(DT_INST_PARENT(index), rxi, irq), \
DT_IRQ_BY_NAME(DT_INST_PARENT(index), rxi, priority), \
uart_ra_sci_rxi_isr, DEVICE_DT_INST_GET(index), 0); \
IRQ_CONNECT(DT_IRQ_BY_NAME(DT_INST_PARENT(index), txi, irq), \
DT_IRQ_BY_NAME(DT_INST_PARENT(index), txi, priority), \
uart_ra_sci_txi_isr, DEVICE_DT_INST_GET(index), 0); \
IRQ_CONNECT(DT_IRQ_BY_NAME(DT_INST_PARENT(index), tei, irq), \
DT_IRQ_BY_NAME(DT_INST_PARENT(index), tei, priority), \
uart_ra_sci_tei_isr, DEVICE_DT_INST_GET(index), 0); \
IRQ_CONNECT(DT_IRQ_BY_NAME(DT_INST_PARENT(index), eri, irq), \
DT_IRQ_BY_NAME(DT_INST_PARENT(index), eri, priority), \
uart_ra_sci_eri_isr, DEVICE_DT_INST_GET(index), 0); \
\
irq_enable(DT_IRQ_BY_NAME(DT_INST_PARENT(index), rxi, irq)); \
irq_enable(DT_IRQ_BY_NAME(DT_INST_PARENT(index), txi, irq)); \
irq_enable(DT_IRQ_BY_NAME(DT_INST_PARENT(index), tei, irq)); \
}
#else
#define UART_RA_SCI_IRQ_INIT(index)
#endif
#define UART_RA_SCI_INIT(index) \
PINCTRL_DT_DEFINE(DT_INST_PARENT(index)); \
static const struct uart_ra_sci_config uart_ra_sci_config_##index = { \
.pcfg = PINCTRL_DT_DEV_CONFIG_GET(DT_INST_PARENT(index)), \
.regs = (R_SCI0_Type *)DT_REG_ADDR(DT_INST_PARENT(index)), \
}; \
\
static struct uart_ra_sci_data uart_ra_sci_data_##index = { \
.uart_config = \
{ \
.baudrate = DT_INST_PROP(index, current_speed), \
.parity = UART_CFG_PARITY_NONE, \
.stop_bits = UART_CFG_STOP_BITS_1, \
.data_bits = UART_CFG_DATA_BITS_8, \
.flow_ctrl = COND_CODE_1(DT_NODE_HAS_PROP(idx, hw_flow_control), \
(UART_CFG_FLOW_CTRL_RTS_CTS), \
(UART_CFG_FLOW_CTRL_NONE)), \
}, \
.fsp_config = \
{ \
.channel = DT_INST_PROP(index, channel), \
.rxi_ipl = DT_IRQ_BY_NAME(DT_INST_PARENT(index), rxi, priority), \
.rxi_irq = DT_IRQ_BY_NAME(DT_INST_PARENT(index), rxi, irq), \
.txi_ipl = DT_IRQ_BY_NAME(DT_INST_PARENT(index), txi, priority), \
.txi_irq = DT_IRQ_BY_NAME(DT_INST_PARENT(index), txi, irq), \
.tei_ipl = DT_IRQ_BY_NAME(DT_INST_PARENT(index), tei, priority), \
.tei_irq = DT_IRQ_BY_NAME(DT_INST_PARENT(index), tei, irq), \
.eri_ipl = DT_IRQ_BY_NAME(DT_INST_PARENT(index), eri, priority), \
.eri_irq = DT_IRQ_BY_NAME(DT_INST_PARENT(index), eri, irq), \
}, \
.fsp_config_extend = {}, \
.fsp_baud_setting = {}, \
.dev = DEVICE_DT_INST_GET(index), \
UART_RA_SCI_ASYNC_INIT(index)}; \
\
static int uart_ra_sci_init##index(const struct device *dev) \
{ \
UART_RA_SCI_IRQ_INIT(index); \
UART_RA_SCI_DTC_INIT(index); \
int err = uart_ra_sci_init(dev); \
if (err != 0) { \
return err; \
} \
return 0; \
} \
DEVICE_DT_INST_DEFINE(index, uart_ra_sci_init##index, NULL, &uart_ra_sci_data_##index, \
&uart_ra_sci_config_##index, PRE_KERNEL_1, \
CONFIG_SERIAL_INIT_PRIORITY, &uart_ra_sci_driver_api);
DT_INST_FOREACH_STATUS_OKAY(UART_RA_SCI_INIT)
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