564 lines
15 KiB
C
564 lines
15 KiB
C
/*
|
|
* Copyright (c) 2006-2023, RT-Thread Development Team
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* Change Logs:
|
|
* Date Author Notes
|
|
* 2012-01-08 bernard first version.
|
|
* 2012-02-03 bernard add const attribute to the ops.
|
|
* 2012-05-15 dzzxzz fixed the return value in attach_device.
|
|
* 2012-05-18 bernard Changed SPI message to message list.
|
|
* Added take/release SPI device/bus interface.
|
|
* 2012-09-28 aozima fixed rt_spi_release_bus assert error.
|
|
*/
|
|
|
|
#include "drivers/dev_spi.h"
|
|
|
|
#define DBG_TAG "spi.core"
|
|
#define DBG_LVL DBG_INFO
|
|
#include <rtdbg.h>
|
|
|
|
extern rt_err_t rt_spi_bus_device_init(struct rt_spi_bus *bus, const char *name);
|
|
extern rt_err_t rt_spidev_device_init(struct rt_spi_device *dev, const char *name);
|
|
|
|
rt_err_t rt_spi_bus_register(struct rt_spi_bus *bus,
|
|
const char *name,
|
|
const struct rt_spi_ops *ops)
|
|
{
|
|
rt_err_t result;
|
|
|
|
result = rt_spi_bus_device_init(bus, name);
|
|
if (result != RT_EOK)
|
|
return result;
|
|
|
|
/* initialize mutex lock */
|
|
rt_mutex_init(&(bus->lock), name, RT_IPC_FLAG_PRIO);
|
|
/* set ops */
|
|
bus->ops = ops;
|
|
/* initialize owner */
|
|
bus->owner = RT_NULL;
|
|
/* set bus mode */
|
|
bus->mode = RT_SPI_BUS_MODE_SPI;
|
|
|
|
return RT_EOK;
|
|
}
|
|
|
|
rt_err_t rt_spi_bus_attach_device_cspin(struct rt_spi_device *device,
|
|
const char *name,
|
|
const char *bus_name,
|
|
rt_base_t cs_pin,
|
|
void *user_data)
|
|
{
|
|
rt_err_t result;
|
|
rt_device_t bus;
|
|
|
|
/* get physical spi bus */
|
|
bus = rt_device_find(bus_name);
|
|
if (bus != RT_NULL && bus->type == RT_Device_Class_SPIBUS)
|
|
{
|
|
device->bus = (struct rt_spi_bus *)bus;
|
|
|
|
/* initialize spidev device */
|
|
result = rt_spidev_device_init(device, name);
|
|
if (result != RT_EOK)
|
|
return result;
|
|
|
|
if(cs_pin != PIN_NONE)
|
|
{
|
|
rt_pin_mode(cs_pin, PIN_MODE_OUTPUT);
|
|
}
|
|
|
|
rt_memset(&device->config, 0, sizeof(device->config));
|
|
device->parent.user_data = user_data;
|
|
device->cs_pin = cs_pin;
|
|
return RT_EOK;
|
|
}
|
|
|
|
/* not found the host bus */
|
|
return -RT_ERROR;
|
|
}
|
|
|
|
rt_err_t rt_spi_bus_attach_device(struct rt_spi_device *device,
|
|
const char *name,
|
|
const char *bus_name,
|
|
void *user_data)
|
|
{
|
|
return rt_spi_bus_attach_device_cspin(device, name, bus_name, PIN_NONE, user_data);
|
|
}
|
|
|
|
rt_err_t rt_spi_bus_configure(struct rt_spi_device *device)
|
|
{
|
|
rt_err_t result = -RT_ERROR;
|
|
|
|
if (device->bus != RT_NULL)
|
|
{
|
|
result = rt_mutex_take(&(device->bus->lock), RT_WAITING_FOREVER);
|
|
if (result == RT_EOK)
|
|
{
|
|
if (device->bus->owner == device)
|
|
{
|
|
/* current device is using, re-configure SPI bus */
|
|
result = device->bus->ops->configure(device, &device->config);
|
|
if (result != RT_EOK)
|
|
{
|
|
/* configure SPI bus failed */
|
|
LOG_E("SPI device %s configuration failed", device->parent.parent.name);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* RT_EBUSY is not an error condition and
|
|
* the configuration will take effect once the device has the bus
|
|
*/
|
|
result = -RT_EBUSY;
|
|
}
|
|
|
|
/* release lock */
|
|
rt_mutex_release(&(device->bus->lock));
|
|
}
|
|
}
|
|
else
|
|
{
|
|
result = RT_EOK;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
rt_err_t rt_spi_configure(struct rt_spi_device *device,
|
|
struct rt_spi_configuration *cfg)
|
|
{
|
|
RT_ASSERT(device != RT_NULL);
|
|
RT_ASSERT(cfg != RT_NULL);
|
|
|
|
/* reset the CS pin */
|
|
if (device->cs_pin != PIN_NONE)
|
|
{
|
|
rt_err_t result = rt_mutex_take(&(device->bus->lock), RT_WAITING_FOREVER);
|
|
if (result == RT_EOK)
|
|
{
|
|
if (cfg->mode & RT_SPI_CS_HIGH)
|
|
{
|
|
rt_pin_write(device->cs_pin, PIN_LOW);
|
|
}
|
|
else
|
|
{
|
|
rt_pin_write(device->cs_pin, PIN_HIGH);
|
|
}
|
|
rt_mutex_release(&(device->bus->lock));
|
|
}
|
|
else
|
|
{
|
|
return result;
|
|
}
|
|
}
|
|
|
|
/* If the configurations are the same, we don't need to set again. */
|
|
if (device->config.data_width == cfg->data_width &&
|
|
device->config.mode == (cfg->mode & RT_SPI_MODE_MASK) &&
|
|
device->config.max_hz == cfg->max_hz)
|
|
{
|
|
return RT_EOK;
|
|
}
|
|
|
|
/* set configuration */
|
|
device->config.data_width = cfg->data_width;
|
|
device->config.mode = cfg->mode & RT_SPI_MODE_MASK;
|
|
device->config.max_hz = cfg->max_hz;
|
|
|
|
return rt_spi_bus_configure(device);
|
|
}
|
|
|
|
rt_err_t rt_spi_send_then_send(struct rt_spi_device *device,
|
|
const void *send_buf1,
|
|
rt_size_t send_length1,
|
|
const void *send_buf2,
|
|
rt_size_t send_length2)
|
|
{
|
|
rt_err_t result;
|
|
struct rt_spi_message message;
|
|
|
|
RT_ASSERT(device != RT_NULL);
|
|
RT_ASSERT(device->bus != RT_NULL);
|
|
|
|
result = rt_mutex_take(&(device->bus->lock), RT_WAITING_FOREVER);
|
|
if (result == RT_EOK)
|
|
{
|
|
if (device->bus->owner != device)
|
|
{
|
|
/* not the same owner as current, re-configure SPI bus */
|
|
result = device->bus->ops->configure(device, &device->config);
|
|
if (result == RT_EOK)
|
|
{
|
|
/* set SPI bus owner */
|
|
device->bus->owner = device;
|
|
}
|
|
else
|
|
{
|
|
/* configure SPI bus failed */
|
|
LOG_E("SPI device %s configuration failed", device->parent.parent.name);
|
|
goto __exit;
|
|
}
|
|
}
|
|
|
|
/* send data1 */
|
|
message.send_buf = send_buf1;
|
|
message.recv_buf = RT_NULL;
|
|
message.length = send_length1;
|
|
message.cs_take = 1;
|
|
message.cs_release = 0;
|
|
message.next = RT_NULL;
|
|
|
|
result = device->bus->ops->xfer(device, &message);
|
|
if (result < 0)
|
|
{
|
|
LOG_E("SPI device %s transfer failed", device->parent.parent.name);
|
|
goto __exit;
|
|
}
|
|
|
|
/* send data2 */
|
|
message.send_buf = send_buf2;
|
|
message.recv_buf = RT_NULL;
|
|
message.length = send_length2;
|
|
message.cs_take = 0;
|
|
message.cs_release = 1;
|
|
message.next = RT_NULL;
|
|
|
|
result = device->bus->ops->xfer(device, &message);
|
|
if (result < 0)
|
|
{
|
|
LOG_E("SPI device %s transfer failed", device->parent.parent.name);
|
|
goto __exit;
|
|
}
|
|
|
|
result = RT_EOK;
|
|
}
|
|
else
|
|
{
|
|
return -RT_EIO;
|
|
}
|
|
|
|
__exit:
|
|
rt_mutex_release(&(device->bus->lock));
|
|
|
|
return result;
|
|
}
|
|
|
|
rt_err_t rt_spi_send_then_recv(struct rt_spi_device *device,
|
|
const void *send_buf,
|
|
rt_size_t send_length,
|
|
void *recv_buf,
|
|
rt_size_t recv_length)
|
|
{
|
|
rt_err_t result;
|
|
struct rt_spi_message message;
|
|
|
|
RT_ASSERT(device != RT_NULL);
|
|
RT_ASSERT(device->bus != RT_NULL);
|
|
|
|
result = rt_mutex_take(&(device->bus->lock), RT_WAITING_FOREVER);
|
|
if (result == RT_EOK)
|
|
{
|
|
if (device->bus->owner != device)
|
|
{
|
|
/* not the same owner as current, re-configure SPI bus */
|
|
result = device->bus->ops->configure(device, &device->config);
|
|
if (result == RT_EOK)
|
|
{
|
|
/* set SPI bus owner */
|
|
device->bus->owner = device;
|
|
}
|
|
else
|
|
{
|
|
/* configure SPI bus failed */
|
|
LOG_E("SPI device %s configuration failed", device->parent.parent.name);
|
|
goto __exit;
|
|
}
|
|
}
|
|
|
|
/* send data */
|
|
message.send_buf = send_buf;
|
|
message.recv_buf = RT_NULL;
|
|
message.length = send_length;
|
|
message.cs_take = 1;
|
|
message.cs_release = 0;
|
|
message.next = RT_NULL;
|
|
|
|
result = device->bus->ops->xfer(device, &message);
|
|
if (result < 0)
|
|
{
|
|
LOG_E("SPI device %s transfer failed", device->parent.parent.name);
|
|
goto __exit;
|
|
}
|
|
|
|
/* recv data */
|
|
message.send_buf = RT_NULL;
|
|
message.recv_buf = recv_buf;
|
|
message.length = recv_length;
|
|
message.cs_take = 0;
|
|
message.cs_release = 1;
|
|
message.next = RT_NULL;
|
|
|
|
result = device->bus->ops->xfer(device, &message);
|
|
if (result < 0)
|
|
{
|
|
LOG_E("SPI device %s transfer failed", device->parent.parent.name);
|
|
goto __exit;
|
|
}
|
|
|
|
result = RT_EOK;
|
|
}
|
|
else
|
|
{
|
|
return -RT_EIO;
|
|
}
|
|
|
|
__exit:
|
|
rt_mutex_release(&(device->bus->lock));
|
|
|
|
return result;
|
|
}
|
|
|
|
rt_ssize_t rt_spi_transfer(struct rt_spi_device *device,
|
|
const void *send_buf,
|
|
void *recv_buf,
|
|
rt_size_t length)
|
|
{
|
|
rt_ssize_t result;
|
|
struct rt_spi_message message;
|
|
|
|
RT_ASSERT(device != RT_NULL);
|
|
RT_ASSERT(device->bus != RT_NULL);
|
|
|
|
result = rt_mutex_take(&(device->bus->lock), RT_WAITING_FOREVER);
|
|
if (result == RT_EOK)
|
|
{
|
|
if (device->bus->owner != device)
|
|
{
|
|
/* not the same owner as current, re-configure SPI bus */
|
|
result = device->bus->ops->configure(device, &device->config);
|
|
if (result == RT_EOK)
|
|
{
|
|
/* set SPI bus owner */
|
|
device->bus->owner = device;
|
|
}
|
|
else
|
|
{
|
|
/* configure SPI bus failed */
|
|
LOG_E("SPI device %s configuration failed", device->parent.parent.name);
|
|
goto __exit;
|
|
}
|
|
}
|
|
|
|
/* initial message */
|
|
message.send_buf = send_buf;
|
|
message.recv_buf = recv_buf;
|
|
message.length = length;
|
|
message.cs_take = 1;
|
|
message.cs_release = 1;
|
|
message.next = RT_NULL;
|
|
|
|
/* transfer message */
|
|
result = device->bus->ops->xfer(device, &message);
|
|
if (result < 0)
|
|
{
|
|
LOG_E("SPI device %s transfer failed", device->parent.parent.name);
|
|
goto __exit;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
return -RT_EIO;
|
|
}
|
|
|
|
__exit:
|
|
rt_mutex_release(&(device->bus->lock));
|
|
|
|
return result;
|
|
}
|
|
|
|
rt_err_t rt_spi_sendrecv8(struct rt_spi_device *device,
|
|
rt_uint8_t senddata,
|
|
rt_uint8_t *recvdata)
|
|
{
|
|
rt_ssize_t len = rt_spi_transfer(device, &senddata, recvdata, 1);
|
|
if (len < 0)
|
|
{
|
|
return (rt_err_t)len;
|
|
}
|
|
else
|
|
{
|
|
return RT_EOK;
|
|
}
|
|
}
|
|
|
|
rt_err_t rt_spi_sendrecv16(struct rt_spi_device *device,
|
|
rt_uint16_t senddata,
|
|
rt_uint16_t *recvdata)
|
|
{
|
|
rt_ssize_t len;
|
|
rt_uint16_t tmp;
|
|
|
|
if (device->config.mode & RT_SPI_MSB)
|
|
{
|
|
tmp = ((senddata & 0xff00) >> 8) | ((senddata & 0x00ff) << 8);
|
|
senddata = tmp;
|
|
}
|
|
|
|
len = rt_spi_transfer(device, &senddata, recvdata, 2);
|
|
if(len < 0)
|
|
{
|
|
return (rt_err_t)len;
|
|
}
|
|
|
|
if (device->config.mode & RT_SPI_MSB)
|
|
{
|
|
tmp = ((*recvdata & 0xff00) >> 8) | ((*recvdata & 0x00ff) << 8);
|
|
*recvdata = tmp;
|
|
}
|
|
|
|
return RT_EOK;
|
|
}
|
|
|
|
struct rt_spi_message *rt_spi_transfer_message(struct rt_spi_device *device,
|
|
struct rt_spi_message *message)
|
|
{
|
|
rt_err_t result;
|
|
struct rt_spi_message *index;
|
|
|
|
RT_ASSERT(device != RT_NULL);
|
|
|
|
/* get first message */
|
|
index = message;
|
|
if (index == RT_NULL)
|
|
return index;
|
|
|
|
result = rt_mutex_take(&(device->bus->lock), RT_WAITING_FOREVER);
|
|
if (result != RT_EOK)
|
|
{
|
|
return index;
|
|
}
|
|
|
|
/* configure SPI bus */
|
|
if (device->bus->owner != device)
|
|
{
|
|
/* not the same owner as current, re-configure SPI bus */
|
|
result = device->bus->ops->configure(device, &device->config);
|
|
if (result == RT_EOK)
|
|
{
|
|
/* set SPI bus owner */
|
|
device->bus->owner = device;
|
|
}
|
|
else
|
|
{
|
|
/* configure SPI bus failed */
|
|
goto __exit;
|
|
}
|
|
}
|
|
|
|
/* transmit each SPI message */
|
|
while (index != RT_NULL)
|
|
{
|
|
/* transmit SPI message */
|
|
result = device->bus->ops->xfer(device, index);
|
|
if (result < 0)
|
|
{
|
|
break;
|
|
}
|
|
|
|
index = index->next;
|
|
}
|
|
|
|
__exit:
|
|
/* release bus lock */
|
|
rt_mutex_release(&(device->bus->lock));
|
|
|
|
return index;
|
|
}
|
|
|
|
rt_err_t rt_spi_take_bus(struct rt_spi_device *device)
|
|
{
|
|
rt_err_t result = RT_EOK;
|
|
|
|
RT_ASSERT(device != RT_NULL);
|
|
RT_ASSERT(device->bus != RT_NULL);
|
|
|
|
result = rt_mutex_take(&(device->bus->lock), RT_WAITING_FOREVER);
|
|
if (result != RT_EOK)
|
|
{
|
|
return -RT_EBUSY;
|
|
}
|
|
|
|
/* configure SPI bus */
|
|
if (device->bus->owner != device)
|
|
{
|
|
/* not the same owner as current, re-configure SPI bus */
|
|
result = device->bus->ops->configure(device, &device->config);
|
|
if (result == RT_EOK)
|
|
{
|
|
/* set SPI bus owner */
|
|
device->bus->owner = device;
|
|
}
|
|
else
|
|
{
|
|
/* configure SPI bus failed */
|
|
rt_mutex_release(&(device->bus->lock));
|
|
|
|
return result;
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
rt_err_t rt_spi_release_bus(struct rt_spi_device *device)
|
|
{
|
|
RT_ASSERT(device != RT_NULL);
|
|
RT_ASSERT(device->bus != RT_NULL);
|
|
RT_ASSERT(device->bus->owner == device);
|
|
|
|
/* release lock */
|
|
return rt_mutex_release(&(device->bus->lock));
|
|
}
|
|
|
|
rt_err_t rt_spi_take(struct rt_spi_device *device)
|
|
{
|
|
rt_ssize_t result;
|
|
struct rt_spi_message message;
|
|
|
|
RT_ASSERT(device != RT_NULL);
|
|
RT_ASSERT(device->bus != RT_NULL);
|
|
|
|
rt_memset(&message, 0, sizeof(message));
|
|
message.cs_take = 1;
|
|
|
|
result = device->bus->ops->xfer(device, &message);
|
|
if(result < 0)
|
|
{
|
|
return (rt_err_t)result;
|
|
}
|
|
|
|
return RT_EOK;
|
|
}
|
|
|
|
rt_err_t rt_spi_release(struct rt_spi_device *device)
|
|
{
|
|
rt_ssize_t result;
|
|
struct rt_spi_message message;
|
|
|
|
RT_ASSERT(device != RT_NULL);
|
|
RT_ASSERT(device->bus != RT_NULL);
|
|
|
|
rt_memset(&message, 0, sizeof(message));
|
|
message.cs_release = 1;
|
|
|
|
result = device->bus->ops->xfer(device, &message);
|
|
if(result < 0)
|
|
{
|
|
return (rt_err_t)result;
|
|
}
|
|
|
|
return RT_EOK;
|
|
}
|