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rt-thread-official/bsp/renesas/ra6m4-cpk/drivers/drv_spi.c

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/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2021-08-23 Mr.Tiger first version
* 2021-11-04 Sherman ADD complete_event
*/
/**< Note : Turn on any DMA mode and all SPIs will turn on DMA */
#include "drv_spi.h"
#ifdef RT_USING_SPI
//#define DRV_DEBUG
#define DBG_TAG "drv.spi"
#ifdef DRV_DEBUG
#define DBG_LVL DBG_LOG
#else
#define DBG_LVL DBG_INFO
#endif /* DRV_DEBUG */
#include <rtdbg.h>
#define RA_SPI0_EVENT 0x00
#define RA_SPI1_EVENT 0x01
static struct rt_event complete_event = {0};
static struct ra_spi_handle spi_handle[] =
{
#ifdef BSP_USING_SPI0
{.bus_name = "spi0", .spi_ctrl_t = &g_spi0_ctrl, .spi_cfg_t = &g_spi0_cfg,},
#endif
#ifdef BSP_USING_SPI1
{.bus_name = "spi1", .spi_ctrl_t = &g_spi1_ctrl, .spi_cfg_t = &g_spi1_cfg,},
#endif
};
static struct ra_spi spi_config[sizeof(spi_handle) / sizeof(spi_handle[0])] = {0};
void g_spi0_callback(spi_callback_args_t *p_args)
{
rt_interrupt_enter();
if (SPI_EVENT_TRANSFER_COMPLETE == p_args->event)
{
rt_event_send(&complete_event, RA_SPI0_EVENT);
}
rt_interrupt_leave();
}
void g_spi1_callback(spi_callback_args_t *p_args)
{
rt_interrupt_enter();
if (SPI_EVENT_TRANSFER_COMPLETE == p_args->event)
{
rt_event_send(&complete_event, RA_SPI1_EVENT);
}
rt_interrupt_leave();
}
static rt_err_t ra_wait_complete(rt_event_t event, const char bus_name[RT_NAME_MAX])
{
rt_uint32_t recved = 0x00;
if (bus_name[3] == '0')
{
return rt_event_recv(event,
RA_SPI0_EVENT,
RT_EVENT_FLAG_OR | RT_EVENT_FLAG_CLEAR,
RT_WAITING_FOREVER,
&recved);
}
else if (bus_name[3] == '1')
{
return rt_event_recv(event,
RA_SPI1_EVENT,
RT_EVENT_FLAG_OR | RT_EVENT_FLAG_CLEAR,
RT_WAITING_FOREVER,
&recved);
}
return -RT_EINVAL;
}
static spi_bit_width_t ra_width_shift(rt_uint8_t data_width)
{
spi_bit_width_t bit_width = SPI_BIT_WIDTH_8_BITS;
if(data_width == 1)
bit_width = SPI_BIT_WIDTH_8_BITS;
else if(data_width == 2)
bit_width = SPI_BIT_WIDTH_16_BITS;
else if(data_width == 4)
bit_width = SPI_BIT_WIDTH_32_BITS;
return bit_width;
}
static rt_err_t ra_write_message(struct rt_spi_device *device, const void *send_buf, const rt_size_t len)
{
RT_ASSERT(device != NULL);
RT_ASSERT(device->parent.user_data != NULL);
RT_ASSERT(send_buf != NULL);
RT_ASSERT(len > 0);
rt_err_t err = RT_EOK;
struct ra_spi *spi_dev = rt_container_of(device->bus, struct ra_spi, bus);
spi_bit_width_t bit_width = ra_width_shift(spi_dev->rt_spi_cfg_t->data_width);
/**< send msessage */
err = R_SPI_Write((spi_ctrl_t *)spi_dev->ra_spi_handle_t->spi_ctrl_t, send_buf, len, bit_width);
if (RT_EOK != err)
{
LOG_E("%s write failed.", spi_dev->ra_spi_handle_t->bus_name);
return -RT_ERROR;
}
/* Wait for SPI_EVENT_TRANSFER_COMPLETE callback event. */
ra_wait_complete(&complete_event, spi_dev->ra_spi_handle_t->bus_name);
return len;
}
static rt_err_t ra_read_message(struct rt_spi_device *device, void *recv_buf, const rt_size_t len)
{
RT_ASSERT(device != NULL);
RT_ASSERT(device->parent.user_data != NULL);
RT_ASSERT(recv_buf != NULL);
RT_ASSERT(len > 0);
rt_err_t err = RT_EOK;
struct ra_spi *spi_dev = rt_container_of(device->bus, struct ra_spi, bus);
spi_bit_width_t bit_width = ra_width_shift(spi_dev->rt_spi_cfg_t->data_width);
/**< receive message */
err = R_SPI_Read((spi_ctrl_t *)spi_dev->ra_spi_handle_t->spi_ctrl_t, recv_buf, len, bit_width);
if (RT_EOK != err)
{
LOG_E("\n%s write failed.\n", spi_dev->ra_spi_handle_t->bus_name);
return -RT_ERROR;
}
/* Wait for SPI_EVENT_TRANSFER_COMPLETE callback event. */
ra_wait_complete(&complete_event, spi_dev->ra_spi_handle_t->bus_name);
return len;
}
static rt_err_t ra_write_read_message(struct rt_spi_device *device, struct rt_spi_message *message)
{
RT_ASSERT(device != NULL);
RT_ASSERT(message != NULL);
RT_ASSERT(message->length > 0);
rt_err_t err = RT_EOK;
struct ra_spi *spi_dev = rt_container_of(device->bus, struct ra_spi, bus);
spi_bit_width_t bit_width = ra_width_shift(spi_dev->rt_spi_cfg_t->data_width);
/**< write and receive message */
err = R_SPI_WriteRead((spi_ctrl_t *)spi_dev->ra_spi_handle_t->spi_ctrl_t, message->send_buf, message->recv_buf, message->length, bit_width);
if (RT_EOK != err)
{
LOG_E("%s write and read failed.", spi_dev->ra_spi_handle_t->bus_name);
return -RT_ERROR;
}
/* Wait for SPI_EVENT_TRANSFER_COMPLETE callback event. */
ra_wait_complete(&complete_event, spi_dev->ra_spi_handle_t->bus_name);
return message->length;
}
/**< init spi TODO : MSB does not support modification */
static rt_err_t ra_hw_spi_configure(struct rt_spi_device *device,
struct rt_spi_configuration *configuration)
{
RT_ASSERT(device != NULL);
RT_ASSERT(configuration != NULL);
rt_err_t err = RT_EOK;
struct ra_spi *spi_dev = rt_container_of(device->bus, struct ra_spi, bus);
spi_dev->cs_pin = (rt_uint32_t)device->parent.user_data;
/**< data_width : 1 -> 8 bits , 2 -> 16 bits, 4 -> 32 bits, default 32 bits*/
rt_uint8_t data_width = configuration->data_width / 8;
RT_ASSERT(data_width == 1 || data_width == 2 || data_width == 4);
configuration->data_width = configuration->data_width / 8;
spi_dev->rt_spi_cfg_t = configuration;
spi_extended_cfg_t *spi_cfg = (spi_extended_cfg_t *)spi_dev->ra_spi_handle_t->spi_cfg_t->p_extend;
/**< Configure Select Line */
rt_pin_write(spi_dev->cs_pin, PIN_HIGH);
/**< config bitrate */
R_SPI_CalculateBitrate(spi_dev->rt_spi_cfg_t->max_hz, &spi_cfg->spck_div);
/**< init */
err = R_SPI_Open((spi_ctrl_t *)spi_dev->ra_spi_handle_t->spi_ctrl_t, (spi_cfg_t const * const)spi_dev->ra_spi_handle_t->spi_cfg_t);
/* handle error */
if (RT_EOK != err)
{
LOG_E("%s init failed.", spi_dev->ra_spi_handle_t->bus_name);
return -RT_ERROR;
}
return RT_EOK;
}
static rt_uint32_t ra_spixfer(struct rt_spi_device *device, struct rt_spi_message *message)
{
RT_ASSERT(device != RT_NULL);
RT_ASSERT(device->bus != RT_NULL);
RT_ASSERT(message != RT_NULL);
rt_err_t err = RT_EOK;
struct ra_spi *spi_dev = rt_container_of(device->bus, struct ra_spi, bus);
spi_dev->cs_pin = (rt_uint32_t)device->parent.user_data;
if (message->cs_take && !(device->config.mode & RT_SPI_NO_CS))
{
if (device->config.mode & RT_SPI_CS_HIGH)
rt_pin_write(spi_dev->cs_pin, PIN_HIGH);
else
rt_pin_write(spi_dev->cs_pin, PIN_LOW);
}
if (message->length > 0)
{
if (message->send_buf == RT_NULL && message->recv_buf != RT_NULL)
{
/**< receive message */
err = ra_read_message(device, (void *)message->recv_buf, (const rt_size_t)message->length);
}
else if (message->send_buf != RT_NULL && message->recv_buf == RT_NULL)
{
/**< send message */
err = ra_write_message(device, (const void *)message->send_buf, (const rt_size_t)message->length);
}
else if (message->send_buf != RT_NULL && message->recv_buf != RT_NULL)
{
/**< send and receive message */
err = ra_write_read_message(device, message);
}
}
if (message->cs_release && !(device->config.mode & RT_SPI_NO_CS))
{
if (device->config.mode & RT_SPI_CS_HIGH)
rt_pin_write(spi_dev->cs_pin, PIN_LOW);
else
rt_pin_write(spi_dev->cs_pin, PIN_HIGH);
}
return err;
}
static const struct rt_spi_ops ra_spi_ops =
{
.configure = ra_hw_spi_configure,
.xfer = ra_spixfer,
};
void rt_hw_spi_device_attach(struct rt_spi_device *device, const char *device_name, const char *bus_name, void *user_data)
{
RT_ASSERT(device != NULL);
RT_ASSERT(device_name != NULL);
RT_ASSERT(bus_name != NULL);
RT_ASSERT(user_data != NULL);
rt_err_t err = rt_spi_bus_attach_device(device, device_name, bus_name, user_data);
if (RT_EOK != err)
{
LOG_E("%s attach failed.", bus_name);
}
}
int ra_hw_spi_init(void)
{
for (rt_uint8_t spi_index = 0; spi_index < sizeof(spi_handle) / sizeof(spi_handle[0]); spi_index++)
{
spi_config[spi_index].ra_spi_handle_t = &spi_handle[spi_index];
/**< register spi bus */
rt_err_t err = rt_spi_bus_register(&spi_config[spi_index].bus, spi_handle[spi_index].bus_name, &ra_spi_ops);
if (RT_EOK != err)
{
LOG_E("%s bus register failed.", spi_config[spi_index].ra_spi_handle_t->bus_name);
return -RT_ERROR;
}
}
if (RT_EOK != rt_event_init(&complete_event, "ra_spi", RT_IPC_FLAG_PRIO))
{
LOG_E("SPI transfer event init fail!");
return -RT_ERROR;
}
return RT_EOK;
}
INIT_BOARD_EXPORT(ra_hw_spi_init);
#endif /* RT_USING_SPI */
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