1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0+ */
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright (C) 2018 Exceet Electronics GmbH
4*4882a593Smuzhiyun * Copyright (C) 2018 Bootlin
5*4882a593Smuzhiyun *
6*4882a593Smuzhiyun * Author: Boris Brezillon <boris.brezillon@bootlin.com>
7*4882a593Smuzhiyun *
8*4882a593Smuzhiyun * Helpers needed by the spi or spi-mem logic. Should not be used outside of
9*4882a593Smuzhiyun * spi-mem.c and spi.c.
10*4882a593Smuzhiyun */
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun #ifndef __LINUX_SPI_INTERNALS_H
13*4882a593Smuzhiyun #define __LINUX_SPI_INTERNALS_H
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun #include <linux/device.h>
16*4882a593Smuzhiyun #include <linux/dma-direction.h>
17*4882a593Smuzhiyun #include <linux/scatterlist.h>
18*4882a593Smuzhiyun #include <linux/spi/spi.h>
19*4882a593Smuzhiyun
20*4882a593Smuzhiyun void spi_flush_queue(struct spi_controller *ctrl);
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun #ifdef CONFIG_HAS_DMA
23*4882a593Smuzhiyun int spi_map_buf(struct spi_controller *ctlr, struct device *dev,
24*4882a593Smuzhiyun struct sg_table *sgt, void *buf, size_t len,
25*4882a593Smuzhiyun enum dma_data_direction dir);
26*4882a593Smuzhiyun void spi_unmap_buf(struct spi_controller *ctlr, struct device *dev,
27*4882a593Smuzhiyun struct sg_table *sgt, enum dma_data_direction dir);
28*4882a593Smuzhiyun #else /* !CONFIG_HAS_DMA */
spi_map_buf(struct spi_controller * ctlr,struct device * dev,struct sg_table * sgt,void * buf,size_t len,enum dma_data_direction dir)29*4882a593Smuzhiyun static inline int spi_map_buf(struct spi_controller *ctlr, struct device *dev,
30*4882a593Smuzhiyun struct sg_table *sgt, void *buf, size_t len,
31*4882a593Smuzhiyun enum dma_data_direction dir)
32*4882a593Smuzhiyun {
33*4882a593Smuzhiyun return -EINVAL;
34*4882a593Smuzhiyun }
35*4882a593Smuzhiyun
spi_unmap_buf(struct spi_controller * ctlr,struct device * dev,struct sg_table * sgt,enum dma_data_direction dir)36*4882a593Smuzhiyun static inline void spi_unmap_buf(struct spi_controller *ctlr,
37*4882a593Smuzhiyun struct device *dev, struct sg_table *sgt,
38*4882a593Smuzhiyun enum dma_data_direction dir)
39*4882a593Smuzhiyun {
40*4882a593Smuzhiyun }
41*4882a593Smuzhiyun #endif /* CONFIG_HAS_DMA */
42*4882a593Smuzhiyun
43*4882a593Smuzhiyun #endif /* __LINUX_SPI_INTERNALS_H */
44