1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Copyright (c) 2010 ASIX Electronics Corporation
4 * Copyright (c) 2020 Samsung Electronics Co., Ltd.
5 *
6 * ASIX AX88796C SPI Fast Ethernet Linux driver
7 */
8
9#ifndef _AX88796C_SPI_H
10#define _AX88796C_SPI_H
11
12#include <linux/spi/spi.h>
13#include <linux/types.h>
14
15/* Definition of SPI command */
16#define AX_SPICMD_WRITE_TXQ 0x02
17#define AX_SPICMD_READ_REG 0x03
18#define AX_SPICMD_READ_STATUS 0x05
19#define AX_SPICMD_READ_RXQ 0x0B
20#define AX_SPICMD_BIDIR_WRQ 0xB2
21#define AX_SPICMD_WRITE_REG 0xD8
22#define AX_SPICMD_EXIT_PWD 0xAB
23
24extern const u8 ax88796c_rx_cmd_buf[];
25extern const u8 ax88796c_tx_cmd_buf[];
26
27struct axspi_data {
28 struct spi_device *spi;
29 struct spi_message rx_msg;
30 struct spi_transfer spi_rx_xfer[2];
31 u8 cmd_buf[6];
32 u8 rx_buf[6];
33 u8 comp;
34};
35
36struct spi_status {
37 u16 isr;
38 u8 status;
39# define AX_STATUS_READY 0x80
40};
41
42int axspi_read_rxq(struct axspi_data *ax_spi, void *data, int len);
43int axspi_write_txq(const struct axspi_data *ax_spi, void *data, int len);
44u16 axspi_read_reg(struct axspi_data *ax_spi, u8 reg);
45int axspi_write_reg(struct axspi_data *ax_spi, u8 reg, u16 value);
46int axspi_read_status(struct axspi_data *ax_spi, struct spi_status *status);
47int axspi_wakeup(struct axspi_data *ax_spi);
48
49static inline u16 AX_READ(struct axspi_data *ax_spi, u8 offset)
50{
51 return axspi_read_reg(ax_spi, reg: offset);
52}
53
54static inline int AX_WRITE(struct axspi_data *ax_spi, u16 value, u8 offset)
55{
56 return axspi_write_reg(ax_spi, reg: offset, value);
57}
58
59static inline int AX_READ_STATUS(struct axspi_data *ax_spi,
60 struct spi_status *status)
61{
62 return axspi_read_status(ax_spi, status);
63}
64
65static inline int AX_WAKEUP(struct axspi_data *ax_spi)
66{
67 return axspi_wakeup(ax_spi);
68}
69#endif
70

source code of linux/drivers/net/ethernet/asix/ax88796c_spi.h