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/*
* Copyright (c) 2006-2023, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2021-01-13 Lyons first version
* 2021-06-23 RiceChen refactor
*/
#include <rthw.h>
#include <rtdevice.h>
#ifdef BSP_USING_SPI
#define LOG_TAG "drv.spi"
#include <drv_log.h>
#include "fsl_iomuxc.h"
#include "drv_spi.h"
static struct imx6ull_spi_config spi_config[] =
{
#ifdef BSP_USING_SPI1
SPI1_BUS_CONFIG,
#endif
#ifdef BSP_USING_SPI2
SPI2_BUS_CONFIG,
#endif
#ifdef BSP_USING_SPI3
SPI3_BUS_CONFIG,
#endif
#ifdef BSP_USING_SPI4
SPI4_BUS_CONFIG,
#endif
};
static struct imx6ull_spi_bus spi_obj[sizeof(spi_config) / sizeof(spi_config[0])];
static rt_err_t imx6ull_ecspi_configure(struct rt_spi_device *device, struct rt_spi_configuration *cfg)
{
struct imx6ull_spi_bus *spi_dev = RT_NULL;
ecspi_master_config_t config;
rt_uint32_t scr_clock = 0;
spi_dev = (struct imx6ull_spi_bus *)(device->bus->parent.user_data);
ECSPI_MasterGetDefaultConfig(&config);
config.samplePeriod = 10;
config.txFifoThreshold = 0;
config.channelConfig.dataLineInactiveState = kECSPI_DataLineInactiveStateHigh;
if (cfg->data_width == 8)
{
config.burstLength = 8;
}
else
{
return -RT_EINVAL;
}
if (cfg->mode & RT_SPI_SLAVE)
{
config.channelConfig.channelMode = kECSPI_Slave;
}
else
{
config.channelConfig.channelMode = kECSPI_Master;
}
if(cfg->mode & RT_SPI_CPHA)
{
config.channelConfig.phase = kECSPI_ClockPhaseSecondEdge;
}
else
{
config.channelConfig.phase = kECSPI_ClockPhaseFirstEdge;
}
if(cfg->mode & RT_SPI_CPOL)
{
config.channelConfig.polarity = kECSPI_PolarityActiveLow;
}
else
{
config.channelConfig.polarity = kECSPI_PolarityActiveHigh;
}
config.baudRate_Bps = cfg->max_hz;
scr_clock = (CLOCK_GetPllFreq(kCLOCK_PllUsb1) / 8U);
ECSPI_MasterInit(spi_dev->config->ECSPI, &config, scr_clock);
return RT_EOK;
}
static rt_ssize_t imx6ull_ecspi_xfer(struct rt_spi_device *device, struct rt_spi_message *message)
{
struct imx6ull_spi_bus *spi_dev = RT_NULL;
struct imx6ull_spi_cs *cs = RT_NULL;
const rt_uint8_t *send_ptr = RT_NULL;
rt_uint8_t *recv_ptr = RT_NULL;
rt_uint16_t size = 0;
rt_uint8_t temp_data;
spi_dev = (struct imx6ull_spi_bus *)(device->bus->parent.user_data);
cs = (struct imx6ull_spi_cs *)device->parent.user_data;
recv_ptr = (rt_uint8_t *)message->recv_buf;
send_ptr = (rt_uint8_t *)message->send_buf;
size = message->length;
if(message->cs_take && cs)
{
rt_pin_write(cs->pin, PIN_LOW);
}
ECSPI_SetChannelSelect(spi_dev->config->ECSPI, kECSPI_Channel0);
while (size--)
{
temp_data = (send_ptr != RT_NULL) ? (*send_ptr++) : 0xff;
while (!(spi_dev->config->ECSPI->STATREG & ECSPI_STATREG_TE_MASK));
ECSPI_WriteData(spi_dev->config->ECSPI, temp_data);
while (!(spi_dev->config->ECSPI->STATREG & ECSPI_STATREG_RR_MASK));
temp_data = ECSPI_ReadData(spi_dev->config->ECSPI);
if (recv_ptr != RT_NULL)
{
*recv_ptr++ = temp_data;
}
}
if(message->cs_release && cs)
{
rt_pin_write(cs->pin, PIN_HIGH);
}
return message->length;
}
rt_err_t rt_hw_spi_device_attach(const char *bus_name, const char *device_name, rt_uint32_t pin)
{
rt_err_t ret = RT_EOK;
struct rt_spi_device *spi_device = (struct rt_spi_device *)rt_malloc(sizeof(struct rt_spi_device));
RT_ASSERT(spi_device != RT_NULL);
struct imx6ull_spi_cs *cs_pin = (struct imx6ull_spi_cs *)rt_malloc(sizeof(struct imx6ull_spi_cs));
RT_ASSERT(cs_pin != RT_NULL);
cs_pin->pin = pin;
rt_pin_mode(pin, PIN_MODE_OUTPUT);
rt_pin_write(pin, PIN_HIGH);
ret = rt_spi_bus_attach_device(spi_device, device_name, bus_name, (void *)cs_pin);
return ret;
}
static rt_err_t imx6ull_spi_gpio_init(struct imx6ull_spi_bus *bus)
{
struct imx6ull_spi_bus *spi_bus = RT_NULL;
spi_bus = (struct imx6ull_spi_bus *)bus;
imx6ull_gpio_init(&spi_bus->config->clk_gpio);
imx6ull_gpio_init(&spi_bus->config->miso_gpio);
imx6ull_gpio_init(&spi_bus->config->mosi_gpio);
return RT_EOK;
}
#ifdef RT_USING_DEVICE_OPS
static const struct rt_spi_ops imxrt_spi_ops =
{
.configure = imx6ull_ecspi_configure,
.xfer = imx6ull_ecspi_xfer,
};
#endif
int rt_hw_spi_init(void)
{
rt_uint16_t obj_num = 0;
obj_num = sizeof(spi_config) / sizeof(spi_config[0]);
for(int i = 0; i < obj_num; i++)
{
spi_obj[i].config = &spi_config[i];
spi_obj[i].config->ECSPI = (ECSPI_Type *)imx6ull_get_periph_vaddr((rt_uint32_t)(spi_obj[i].config->ECSPI));
imx6ull_spi_gpio_init(&spi_obj[i]);
CLOCK_EnableClock(spi_obj[i].config->clk_ip_name);
spi_obj[i].parent.parent.user_data = &spi_obj[i];
rt_spi_bus_register(&spi_obj[i].parent, spi_obj[i].config->name, &imxrt_spi_ops);
}
return RT_EOK;
}
INIT_DEVICE_EXPORT(rt_hw_spi_init);
#endif
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