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/*
* Copyright (c) 2006-2022, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2022-02-22 airm2m first version
*/
#include <rtthread.h>
#include <rtdevice.h>
#include "board.h"
#ifdef RT_USING_SPI
#if !defined(BSP_USING_HSPI0) && !defined(BSP_USING_SPI0) && !defined(BSP_USING_SPI1) && !defined(BSP_USING_SPI2) && !defined(BSP_USING_SPI0S)
#error "Please define at least one BSP_USING_SPIx"
/* this driver can be disabled at menuconfig -> RT-Thread Components -> Device Drivers */
#endif
#include "drv_spi.h"
#include "drv_config.h"
//#define DRV_DEBUG
#define LOG_TAG "drv.spi"
#include <drv_log.h>
static struct air_spi spi_config[] =
{
#ifdef BSP_USING_HSPI0
HSPI0_BUS_CONFIG,
#endif
#ifdef BSP_USING_SPI0
SPI0_BUS_CONFIG,
#endif
#ifdef BSP_USING_SPI1
SPI1_BUS_CONFIG,
#endif
#ifdef BSP_USING_SPI2
SPI2_BUS_CONFIG,
#endif
#ifdef BSP_USING_SPI0S
SPI0S_BUS_CONFIG,
#endif
};
static rt_uint32_t 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_uint32_t spi_id = device->bus->parent.user_data;
rt_uint32_t cs_pin = device->parent.user_data;
if (message->cs_take && !(device->config.mode & RT_SPI_NO_CS))
{
if (device->config.mode & RT_SPI_CS_HIGH)
GPIO_Output(cs_pin, 1);
else
GPIO_Output(cs_pin, 0);
}
if (message->length)
{
LOG_D("spi%d 0x%X, 0x%X, %d",
spi_id,
(uint32_t)message->send_buf,
(uint32_t)message->recv_buf, message->length);
if (!message->send_buf)
{
SPI_BlockTransfer(spi_id, message->recv_buf, message->recv_buf, message->length);
}
else
{
SPI_BlockTransfer(spi_id, message->send_buf, message->recv_buf, message->length);
}
LOG_D("spi%d done", spi_id);
}
if (message->cs_release && !(device->config.mode & RT_SPI_NO_CS))
{
if (device->config.mode & RT_SPI_CS_HIGH)
GPIO_Output(cs_pin, 0);
else
GPIO_Output(cs_pin, 1);
}
return message->length;
}
static rt_err_t spi_configure(struct rt_spi_device *device,
struct rt_spi_configuration *configuration)
{
RT_ASSERT(device != RT_NULL);
RT_ASSERT(configuration != RT_NULL);
rt_uint32_t spi_id = device->bus->parent.user_data;
rt_uint8_t mode = configuration->mode & (RT_SPI_CPHA | RT_SPI_CPOL);
if (configuration->mode & RT_SPI_SLAVE) return -RT_EINVAL;
switch(spi_id)
{
case 0:
GPIO_Iomux(GPIOC_12,3);
GPIO_Iomux(GPIOC_13,3);
GPIO_Iomux(GPIOC_15,3);
break;
case 1:
GPIO_Iomux(GPIOB_12, 0);
GPIO_Iomux(GPIOB_14, 0);
GPIO_Iomux(GPIOB_15, 0);
break;
case 2:
GPIO_Iomux(GPIOA_06,3);
GPIO_Iomux(GPIOA_08,3);
GPIO_Iomux(GPIOA_09,3);
break;
case 3:
GPIO_Iomux(GPIOB_02,0);
GPIO_Iomux(GPIOB_04,0);
GPIO_Iomux(GPIOB_05,0);
break;
}
SPI_MasterInit(spi_id, configuration->data_width, mode, configuration->max_hz, RT_NULL, RT_NULL);
return RT_EOK;
}
static const struct rt_spi_ops air105_spi_ops =
{
.configure = spi_configure,
.xfer = spixfer,
};
/**
* Attach the spi device to SPI bus, this function must be used after initialization.
*/
rt_err_t rt_hw_spi_device_attach(const char *bus_name, const char *device_name, rt_uint8_t cs_pin)
{
RT_ASSERT(bus_name != RT_NULL);
RT_ASSERT(device_name != RT_NULL);
rt_err_t result;
struct rt_spi_device *spi_device;
/* attach the device to spi bus*/
spi_device = (struct rt_spi_device *)rt_malloc(sizeof(struct rt_spi_device));
RT_ASSERT(spi_device != RT_NULL);
GPIO_Config(cs_pin, 0, 1);
result = rt_spi_bus_attach_device(spi_device, device_name, bus_name, (void *)cs_pin);
if (result != RT_EOK)
{
LOG_E("%s attach to %s faild, %d\n", device_name, bus_name, result);
}
RT_ASSERT(result == RT_EOK);
LOG_D("%s attach to %s done", device_name, bus_name);
return result;
}
int rt_hw_spi_init(void)
{
rt_err_t result;
rt_size_t obj_num = sizeof(spi_config) / sizeof(struct air_spi);
for (int spi_index = 0; spi_index < obj_num ; spi_index++)
{
result = rt_spi_bus_register(&(spi_config[spi_index].bus), spi_config[spi_index].bus_name, &air105_spi_ops);
RT_ASSERT(result == RT_EOK);
spi_config[spi_index].bus.parent.user_data = spi_config[spi_index].id;
}
return RT_EOK;
}
INIT_BOARD_EXPORT(rt_hw_spi_init);
#endif /* RT_USING_SPI */
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