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rt-thread/bsp/bouffalo_lab/libraries/rt_drivers/drv_spi.c

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/*
* Copyright (c) 2006-2023, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2023-05-01 flyingcys first version
*/
#include <rtthread.h>
#include <rthw.h>
#include <rtdevice.h>
#include "board.h"
#include "drv_spi.h"
#ifdef BSP_USING_SPI
#define DBG_LEVEL DBG_LOG
#include <rtdbg.h>
#define LOG_TAG "drv.spi"
#define DMA_MAX_BUFSIZE 4095
#if defined(BSP_USING_BL808)
#define NOCACHE_BUFSTART 0x22026000
#define NOCACHE_BUFSIZE (40 * 1024)
#elif defined (BSP_USING_BL61X)
#define NOCACHE_BUFSTART 0x22FC6000
#define NOCACHE_BUFSIZE (104 * 1024)
#endif
struct bl_device_spi
{
struct rt_spi_bus spi_bus;
struct bflb_device_s *spi;
#if defined(BSP_SPI_TX_USING_DMA)
struct bflb_device_s *dma_tx;
rt_uint32_t dma_dst_req;
rt_sem_t sem_tx;
#endif
#if defined(BSP_SPI_RX_USING_DMA)
struct bflb_device_s *dma_rx;
rt_uint32_t dma_src_req;
rt_sem_t sem_rx;
#endif
};
#if defined(BSP_SPI_TX_USING_DMA) && defined(BSP_SPI_TX_DMA_NOCACHE_BUFSIZE)
static ATTR_NOCACHE_NOINIT_RAM_SECTION rt_uint8_t dma_tx_buf[BSP_SPI_TX_DMA_NOCACHE_BUFSIZE];
#endif
#if defined(BSP_SPI_RX_USING_DMA) && defined(BSP_SPI_RX_DMA_NOCACHE_BUFSIZE)
static ATTR_NOCACHE_NOINIT_RAM_SECTION rt_uint8_t dma_rx_buf[BSP_SPI_RX_DMA_NOCACHE_BUFSIZE];
#endif
#if defined(BSP_SPI_TX_USING_DMA)
static void spi_bl_spi_dma_tx_isr(void *arg)
{
struct bl_device_spi *bl_spi = (struct bl_device_spi *)arg;
LOG_D("spi dma tx done ");
rt_sem_release(bl_spi->sem_tx);
}
#endif
#if defined(BSP_SPI_RX_USING_DMA)
void spi_dma_rx_isr(void *arg)
{
struct bl_device_spi *bl_spi = (struct bl_device_spi *)arg;
LOG_D("spi dma rx done");
rt_sem_release(bl_spi->sem_rx);
}
#endif
static rt_err_t spi_configure(struct rt_spi_device *device,
struct rt_spi_configuration *cfg)
{
RT_ASSERT(device != RT_NULL);
RT_ASSERT(device->bus != RT_NULL);
RT_ASSERT(device->bus->parent.user_data != RT_NULL);
RT_ASSERT(cfg != RT_NULL);
struct bflb_spi_config_s spi_cfg = {
.freq = 1 * 1000 * 1000,
.role = SPI_ROLE_MASTER,
.mode = SPI_MODE3,
.data_width = SPI_DATA_WIDTH_8BIT,
.bit_order = SPI_BIT_MSB,
.byte_order = SPI_BYTE_LSB,
.tx_fifo_threshold = 0,
.rx_fifo_threshold = 0,
};
switch (cfg->mode & RT_SPI_MODE_3)
{
case RT_SPI_MODE_0: /* RT_SPI_CPOL:0 , RT_SPI_CPHA:0 */
spi_cfg.mode = SPI_MODE0;
break;
case RT_SPI_MODE_1: /* RT_SPI_CPOL:0 , RT_SPI_CPHA:1 */
spi_cfg.mode = SPI_MODE1;
break;
case RT_SPI_MODE_2: /* RT_SPI_CPOL:1 , RT_SPI_CPHA:0 */
spi_cfg.mode = SPI_MODE2;
break;
case RT_SPI_MODE_3: /* RT_SPI_CPOL:1 , RT_SPI_CPHA:1 */
spi_cfg.mode = SPI_MODE3;
break;
default:
LOG_E("spi_configure mode error %x\n", cfg->mode);
return -RT_EINVAL;
}
switch (cfg->data_width)
{
case 8:
spi_cfg.data_width = SPI_DATA_WIDTH_8BIT;
break;
case 16:
spi_cfg.data_width = SPI_DATA_WIDTH_16BIT;
break;
case 24:
spi_cfg.data_width = SPI_DATA_WIDTH_24BIT;
break;
case 32:
spi_cfg.data_width = SPI_DATA_WIDTH_32BIT;
break;
default:
LOG_E("spi_configure data_width error %x\n", cfg->data_width);
return RT_ERROR;
}
spi_cfg.freq = cfg->max_hz;
if (cfg->mode & RT_SPI_MSB)
spi_cfg.bit_order = SPI_BIT_MSB;
else
spi_cfg.bit_order = SPI_BIT_LSB;
if (cfg->mode & RT_SPI_SLAVE)
spi_cfg.role = SPI_ROLE_SLAVE;
else
spi_cfg.role = SPI_ROLE_MASTER;
struct bl_device_spi *bl_spi;
bl_spi = (struct bl_device_spi *)device->bus->parent.user_data;
bflb_spi_init(bl_spi->spi, &spi_cfg);
#if defined(BSP_SPI_TX_USING_DMA)
bl_spi->sem_tx = rt_sem_create("dam_tx", 0, RT_IPC_FLAG_PRIO);
if (bl_spi->sem_tx == RT_NULL)
{
LOG_E("rt_sem_create dma_tx error");
return -RT_ENOMEM;
}
rt_uint8_t tx_data_width = DMA_DATA_WIDTH_8BIT;
if (spi_cfg.data_width == SPI_DATA_WIDTH_8BIT)
tx_data_width = DMA_DATA_WIDTH_8BIT;
else if (spi_cfg.data_width == SPI_DATA_WIDTH_16BIT)
tx_data_width = DMA_DATA_WIDTH_16BIT;
else if (spi_cfg.data_width == SPI_DATA_WIDTH_32BIT)
tx_data_width = DMA_DATA_WIDTH_32BIT;
else
{
LOG_E("spi dma not support 24bit...");
return -RT_EINVAL;
}
struct bflb_dma_channel_config_s tx_config = {
.direction = DMA_MEMORY_TO_PERIPH,
.src_req = DMA_REQUEST_NONE,
.dst_req = bl_spi->dma_dst_req,
.src_addr_inc = DMA_ADDR_INCREMENT_ENABLE,
.dst_addr_inc = DMA_ADDR_INCREMENT_DISABLE,
.src_burst_count = DMA_BURST_INCR1,
.dst_burst_count = DMA_BURST_INCR1,
.src_width = tx_data_width,
.dst_width = tx_data_width,
};
bflb_spi_link_txdma(bl_spi->spi, true);
bflb_dma_channel_init(bl_spi->dma_tx, &tx_config);
bflb_dma_channel_irq_attach(bl_spi->dma_tx, spi_bl_spi_dma_tx_isr, (void *)bl_spi);
#endif
#if defined(BSP_SPI_RX_USING_DMA)
bl_spi->sem_rx = rt_sem_create("dam_rx", 0, RT_IPC_FLAG_PRIO);
if (bl_spi->sem_rx == RT_NULL)
{
LOG_E("rt_sem_create dma_rx error");
return -RT_ENOMEM;
}
rt_uint8_t rx_data_width = DMA_DATA_WIDTH_8BIT;
if (spi_cfg.data_width == SPI_DATA_WIDTH_8BIT)
rx_data_width = DMA_DATA_WIDTH_8BIT;
else if (spi_cfg.data_width == SPI_DATA_WIDTH_16BIT)
rx_data_width = DMA_DATA_WIDTH_16BIT;
else if (spi_cfg.data_width == SPI_DATA_WIDTH_32BIT)
rx_data_width = DMA_DATA_WIDTH_32BIT;
else
{
LOG_E("spi dma not support 24bit...");
return -RT_EINVAL;
}
struct bflb_dma_channel_config_s rx_config = {
.direction = DMA_PERIPH_TO_MEMORY,
.src_req = bl_spi->dma_src_req,
.dst_req = DMA_REQUEST_NONE,
.src_addr_inc = DMA_ADDR_INCREMENT_DISABLE,
.dst_addr_inc = DMA_ADDR_INCREMENT_ENABLE,
.src_burst_count = DMA_BURST_INCR1,
.dst_burst_count = DMA_BURST_INCR1,
.src_width = rx_data_width,
.dst_width = rx_data_width,
};
bflb_spi_link_rxdma(bl_spi->spi, true);
bflb_dma_channel_init(bl_spi->dma_rx, &rx_config);
bflb_dma_channel_irq_attach(bl_spi->dma_rx, spi_dma_rx_isr, (void *)bl_spi);
#endif
return RT_EOK;
}
#if defined(BSP_SPI_TX_USING_DMA)
static rt_err_t _bl_spi_dma_tx(struct bl_device_spi *bl_spi, rt_uint8_t *src, rt_size_t length)
{
rt_err_t result;
struct bflb_dma_channel_lli_pool_s tx_llipool[1];
struct bflb_dma_channel_lli_transfer_s tx_transfers[1];
tx_transfers[0].src_addr = (rt_uint32_t)src;
tx_transfers[0].dst_addr = (rt_uint32_t)DMA_ADDR_SPI0_TDR;
tx_transfers[0].nbytes = length;
LOG_D("dma tx start...");
rt_kprintf("tx length:%d\n", length);
bflb_dma_channel_lli_reload(bl_spi->dma_tx, tx_llipool, 1, tx_transfers, 1);
bflb_dma_channel_start(bl_spi->dma_tx);
result = rt_sem_take(bl_spi->sem_tx, BSP_SPI_TX_DMA_TIMEOUT);
if (result != RT_EOK)
LOG_E("sem take dma tx error:%d", result);
return result;
}
static rt_err_t _spi_dma_xfer_tx(struct rt_spi_device *device, struct rt_spi_message *message)
{
rt_err_t result = RT_EOK;
rt_uint8_t *src = (rt_uint8_t *)message->send_buf;
rt_size_t length = message->length;
struct bl_device_spi *bl_spi = (struct bl_device_spi *)device->bus->parent.user_data;
#if defined(NOCACHE_BUFSTART) && defined(NOCACHE_BUFSIZE)
if ((message->send_buf < NOCACHE_BUFSTART) || (message->send_buf > (NOCACHE_BUFSTART + NOCACHE_BUFSIZE)))
{
if (length <= BSP_SPI_TX_DMA_NOCACHE_BUFSIZE)
{
memcpy(dma_tx_buf, src, length);
result = _bl_spi_dma_tx(bl_spi, dma_tx_buf, length);
}
else
{
while(length > 0)
{
if (length >= BSP_SPI_TX_DMA_NOCACHE_BUFSIZE)
{
memcpy(dma_tx_buf, src, BSP_SPI_TX_DMA_NOCACHE_BUFSIZE);
result = _bl_spi_dma_tx(bl_spi, dma_tx_buf, BSP_SPI_TX_DMA_NOCACHE_BUFSIZE);
if (result != RT_EOK)
break;
length -= BSP_SPI_TX_DMA_NOCACHE_BUFSIZE;
src += BSP_SPI_TX_DMA_NOCACHE_BUFSIZE;
}
else
{
memcpy(dma_tx_buf, src, length);
result = _bl_spi_dma_tx(bl_spi, dma_tx_buf, length);
length = 0;
}
}
}
}
else
#endif
{
if (length <= DMA_MAX_BUFSIZE)
{
result = _bl_spi_dma_tx(bl_spi, src, length);
}
else
{
while(length > 0)
{
if (length >= DMA_MAX_BUFSIZE)
{
result = _bl_spi_dma_tx(bl_spi, src, DMA_MAX_BUFSIZE);
if (result != RT_EOK)
break;
length -= DMA_MAX_BUFSIZE;
src += DMA_MAX_BUFSIZE;
}
else
{
result = _bl_spi_dma_tx(bl_spi, src, length);
length = 0;
}
}
}
}
LOG_D("dma tx finish...");
return result;
}
#endif
#if defined(BSP_SPI_RX_USING_DMA)
static rt_err_t _bl_spi_dma_rx(struct bl_device_spi *bl_spi, rt_uint8_t *dst, rt_size_t length)
{
rt_err_t result;
struct bflb_dma_channel_lli_pool_s rx_llipool[1];
struct bflb_dma_channel_lli_transfer_s rx_transfers[1];
rx_transfers[0].src_addr = (rt_uint32_t)DMA_ADDR_SPI0_RDR;
rx_transfers[0].dst_addr = (rt_uint32_t)dst;
rx_transfers[0].nbytes = length;
bflb_dma_channel_lli_reload(bl_spi->dma_rx, rx_llipool, 1, rx_transfers, 1);
bflb_dma_channel_start(bl_spi->dma_rx);
result = rt_sem_take(bl_spi->sem_rx, BSP_SPI_RX_DMA_TIMEOUT);
if (result != RT_EOK)
LOG_E("sem take dma rx error:%d", result);
return result;
}
static rt_err_t _spi_dma_xfer_rx(struct rt_spi_device *device, struct rt_spi_message *message)
{
rt_err_t result = RT_EOK;
rt_uint8_t *dst = (rt_uint8_t *)message->recv_buf;
rt_size_t length = message->length;
struct bl_device_spi *bl_spi = (struct bl_device_spi *)device->bus->parent.user_data;
#if defined(NOCACHE_BUFSTART) && defined(NOCACHE_BUFSIZE)
if ((message->recv_buf < NOCACHE_BUFSTART) || (message->recv_buf > (NOCACHE_BUFSTART + NOCACHE_BUFSIZE)))
{
if (length <= BSP_SPI_RX_DMA_NOCACHE_BUFSIZE)
{
result = _bl_spi_dma_rx(bl_spi, dst, length);
if (result == RT_EOK)
memcpy(dst, dma_rx_buf, length);
}
else
{
while(length > 0)
{
if (length >= BSP_SPI_RX_DMA_NOCACHE_BUFSIZE)
{
result = _bl_spi_dma_rx(bl_spi, dma_tx_buf, BSP_SPI_RX_DMA_NOCACHE_BUFSIZE);
if (result != RT_EOK)
break;
memcpy(dst, dma_rx_buf, BSP_SPI_RX_DMA_NOCACHE_BUFSIZE);
length -= BSP_SPI_RX_DMA_NOCACHE_BUFSIZE;
dst += BSP_SPI_RX_DMA_NOCACHE_BUFSIZE;
}
else
{
result = _bl_spi_dma_rx(bl_spi, dma_rx_buf, length);
if (result != RT_EOK)
break;
memcpy(dst, dma_rx_buf, length);
length = 0;
}
}
}
}
else
#endif
{
if (length <= DMA_MAX_BUFSIZE)
{
result = _bl_spi_dma_rx(bl_spi, dst, length);
if (result == RT_EOK)
memcpy(dst, dma_rx_buf, length);
}
else
{
while(length > 0)
{
if (length >= DMA_MAX_BUFSIZE)
{
result = _bl_spi_dma_rx(bl_spi, dst, DMA_MAX_BUFSIZE);
if (result != RT_EOK)
break;
memcpy(dst, dma_rx_buf, DMA_MAX_BUFSIZE);
length -= DMA_MAX_BUFSIZE;
dst += DMA_MAX_BUFSIZE;
}
else
{
result = _bl_spi_dma_rx(bl_spi, dst, length);
if (result != RT_EOK)
break;
memcpy(dst, dma_rx_buf, length);
length = 0;
}
}
}
}
LOG_D("dma rx finish...");
return result;
}
#endif
static rt_ssize_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);
rt_err_t result;
rt_uint32_t cs_pin = (rt_uint32_t)device->parent.user_data;
struct bflb_device_s* gpio = bflb_device_get_by_name("gpio");
struct bl_device_spi *bl_spi;
bl_spi = (struct bl_device_spi *)device->bus->parent.user_data;
if (message->cs_take && !(device->config.mode & RT_SPI_NO_CS))
{
if (device->config.mode & RT_SPI_CS_HIGH)
bflb_gpio_set(gpio, cs_pin);
else
bflb_gpio_reset(gpio, cs_pin);
}
if (message->send_buf && message->recv_buf)
{
rt_memset(message->recv_buf, 0x0, message->length);
bflb_spi_poll_exchange(bl_spi->spi, (void *)message->send_buf, (void *)message->recv_buf, message->length);
message->length += strlen(message->recv_buf);
}
else if (message->send_buf)
{
#if defined(BSP_SPI_TX_USING_DMA)
result = _spi_dma_xfer_tx(device, message);
if(result != RT_EOK)
message->length = -1;
#else
bflb_spi_poll_exchange(bl_spi->spi, (void *)message->send_buf, NULL, message->length);
#endif
}
else if (message->recv_buf)
{
rt_memset(message->recv_buf, 0x0, message->length);
#if defined(BSP_SPI_RX_USING_DMA)
result = _spi_dma_xfer_rx(device, message);
if(result != RT_EOK)
message->length = -1;
#else
bflb_spi_poll_exchange(bl_spi->spi, NULL, (void *)message->recv_buf, message->length);
#endif
}
else
{
LOG_E("both send_buf and recv_buf is null!");
message->length = -1;
}
if (message->cs_release && !(device->config.mode & RT_SPI_NO_CS))
{
if (device->config.mode & RT_SPI_CS_HIGH)
bflb_gpio_reset(gpio, cs_pin);
else
bflb_gpio_set(gpio, cs_pin);
}
return message->length;
}
/* spi bus callback function */
static const struct rt_spi_ops bl_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_uint32_t cs_pin)
{
RT_ASSERT(bus_name != RT_NULL);
RT_ASSERT(device_name != RT_NULL);
rt_err_t ret;
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);
/* initialize the cs pin */
ret = rt_spi_bus_attach_device(spi_device, device_name, bus_name, (void *)cs_pin);
if (ret != RT_EOK)
{
LOG_E("%s attach to %s faild, %d", device_name, bus_name, ret);
ret = RT_ERROR;
}
RT_ASSERT(ret == RT_EOK);
return ret;
}
int rt_hw_spi_init(void)
{
rt_err_t ret = RT_ERROR;
static struct bl_device_spi dev_spi;
struct bflb_device_s *gpio;
gpio = bflb_device_get_by_name("gpio");
#ifndef BL808_CORE_D0
bflb_gpio_init(gpio, SPI_SCK_PIN, GPIO_FUNC_SPI0 | GPIO_ALTERNATE | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_1);
bflb_gpio_init(gpio, SPI_MISO_PIN, GPIO_FUNC_SPI0 | GPIO_ALTERNATE | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_1);
bflb_gpio_init(gpio, SPI_MOSI_PIN, GPIO_FUNC_SPI0 | GPIO_ALTERNATE | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_1);
dev_spi.spi = bflb_device_get_by_name("spi0");
#ifdef BSP_SPI_TX_USING_DMA
dev_spi.dma_dst_req = DMA_REQUEST_SPI0_TX;
dev_spi.dma_tx = bflb_device_get_by_name(BSP_SPI_TX_DMA_CHANNEL);
#endif
#ifdef BSP_SPI_RX_USING_DMA
dev_spi.dma_src_req = DMA_REQUEST_SPI0_RX;
dev_spi.dma_rx = bflb_device_get_by_name(BSP_SPI_RX_DMA_CHANNEL);
#endif
#endif /* BL808_CORE_D0 */
dev_spi.spi_bus.parent.user_data = (void *)&dev_spi;
ret = rt_spi_bus_register(&dev_spi.spi_bus, "spi0", &bl_spi_ops);
RT_ASSERT(ret == RT_EOK);
return ret;
}
INIT_BOARD_EXPORT(rt_hw_spi_init);
#endif /* BSP_USING_SPI */
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