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/*
* Copyright (c) 2019 Winner Microelectronics Co., Ltd.
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2018-11-12 fanwenl 1st version
*/
#include <rtthread.h>
#include <rtdevice.h>
#include "board.h"
#include "wm_hostspi.h"
#include "wm_spi_hal.h"
#include "wm_io.h"
#include "wm_gpio_afsel.h"
#include "pin_map.h"
#include "drv_spi.h"
#ifdef BSP_USING_SPI
#define BSP_SPI_MAX_HZ (20* 1000 *1000)
struct wm_sw_spi_cs
{
rt_int16_t pin;
};
struct wm_spi
{
struct rt_spi_configuration *cfg;
};
static rt_err_t wm_hostspi_init(struct rt_spi_configuration *cfg)
{
spi_clear_fifo();
spi_set_endian(1);
if (cfg->data_width == 8)
{
tls_spi_trans_type(SPI_BYTE_TRANSFER);
}
if (cfg->data_width == 16)
{
tls_spi_trans_type(SPI_WORD_TRANSFER);
}
spi_set_mode(cfg->mode);
spi_set_chipselect_mode(SPI_CS_INACTIVE_MODE);
spi_force_cs_out(1);
if(cfg->max_hz > BSP_SPI_MAX_HZ)
{
cfg->max_hz = BSP_SPI_MAX_HZ;
}
spi_set_sclk(cfg->max_hz);
spi_set_tx_trigger_level(0);
spi_set_rx_trigger_level(7);
spi_set_rx_channel(1);
spi_set_tx_channel(1);
return RT_EOK;
}
static rt_err_t spi_configure(struct rt_spi_device *device, struct rt_spi_configuration *cfg)
{
RT_ASSERT(cfg != RT_NULL);
RT_ASSERT(device != RT_NULL);
/*将cfg参数放到device中*/
struct wm_spi *hspi = (struct wm_spi *)device->bus->parent.user_data;
hspi->cfg = cfg;
wm_hostspi_init(cfg);
return RT_EOK;
}
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(device->bus->parent.user_data != RT_NULL);
struct wm_sw_spi_cs *cs = device->parent.user_data;
struct tls_spi_transfer tls_transfer;
tls_transfer.tx_buf = message->send_buf;
tls_transfer.rx_buf = message->recv_buf;
tls_transfer.len = message->length;
rt_int32_t length = 0;
rt_int32_t remain_length = message->length;
rt_int32_t int_status;
tls_irq_disable(SPI0_INT);
length = spi_fill_txfifo(&tls_transfer, remain_length);
spi_set_sclk_length(length * 8, 0);
if (message->cs_take && cs)
{
tls_gpio_write((enum tls_io_name)cs->pin, 0);
}
spi_sclk_start();
while (remain_length > 0)
{
while (spi_i2s_get_busy_status() == 1)
;
length = spi_get_rxfifo(&tls_transfer, remain_length);
remain_length -= length;
if (remain_length == 0)
{
while (spi_i2s_get_busy_status() == 1)
;
if (message->cs_release && cs)
{
tls_gpio_write((enum tls_io_name)cs->pin, 1);
}
}
while (spi_i2s_get_busy_status() == 1)
;
length = spi_fill_txfifo(&tls_transfer, remain_length);
if (length)
{
spi_set_sclk_length(length * 8, 0);
spi_sclk_start();
}
}
while (spi_i2s_get_busy_status() == 1)
;
if (message->cs_release && cs)
{
tls_gpio_write((enum tls_io_name)cs->pin, 1);
}
int_status = spi_get_int_status();
spi_clear_int_status(int_status);
tls_irq_enable(SPI0_INT);
return message->length - remain_length;
}
rt_err_t wm_spi_bus_attach_device(const char *bus_name, const char *device_name, rt_uint32_t pin)
{
rt_err_t ret;
rt_int16_t gpio_pin;
struct rt_spi_device *spi_device;
struct wm_sw_spi_cs *cs_pin;
gpio_pin = wm_get_pin(pin);
if (gpio_pin == WM_PIN_DEFAULT)
{
return -RT_ERROR;
}
spi_device = (struct rt_spi_device *)rt_malloc(sizeof(struct rt_spi_device));
RT_ASSERT(spi_device != RT_NULL);
cs_pin = (struct wm_sw_spi_cs *)rt_malloc(sizeof(struct wm_sw_spi_cs));
RT_ASSERT(cs_pin != RT_NULL);
cs_pin->pin = gpio_pin;
tls_gpio_cfg((enum tls_io_name)gpio_pin, WM_GPIO_DIR_OUTPUT, WM_GPIO_ATTR_PULLHIGH);
tls_gpio_write((enum tls_io_name)gpio_pin, 1);
ret = rt_spi_bus_attach_device(spi_device, device_name, bus_name, (void *)cs_pin);
return ret;
}
static struct rt_spi_ops wm_spi_ops =
{
.configure = spi_configure,
.xfer = spixfer
};
struct wm_spi spi;
struct rt_spi_bus wm_spi_bus;
int wm_hw_spi_bus_init(void)
{
rt_int16_t gpio_pin;
gpio_pin = wm_get_pin(WM_SPI_CK_PIN);
if (gpio_pin >= 0)
{
wm_spi_ck_config((enum tls_io_name)gpio_pin);
}
gpio_pin = wm_get_pin(WM_SPI_DI_PIN);
if (gpio_pin >= 0)
{
wm_spi_di_config((enum tls_io_name)gpio_pin);
}
gpio_pin = wm_get_pin(WM_SPI_DO_PIN);
if (gpio_pin >= 0)
{
wm_spi_do_config((enum tls_io_name)gpio_pin);
}
wm_spi_bus.parent.user_data = &spi;
#ifdef WM_SPI_BUS_NAME
rt_spi_bus_register(&wm_spi_bus, WM_SPI_BUS_NAME, &wm_spi_ops);
#else
rt_spi_bus_register(&wm_spi_bus, "spi0", &wm_spi_ops);
#endif
return RT_EOK;
}
INIT_PREV_EXPORT(wm_hw_spi_bus_init);
#endif /* BSP_USING_SPI */
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