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
24 extern const u8 ax88796c_rx_cmd_buf[];
25 extern const u8 ax88796c_tx_cmd_buf[];
26
27 struct 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
36 struct spi_status {
37 u16 isr;
38 u8 status;
39 # define AX_STATUS_READY 0x80
40 };
41
42 int axspi_read_rxq(struct axspi_data *ax_spi, void *data, int len);
43 int axspi_write_txq(const struct axspi_data *ax_spi, void *data, int len);
44 u16 axspi_read_reg(struct axspi_data *ax_spi, u8 reg);
45 int axspi_write_reg(struct axspi_data *ax_spi, u8 reg, u16 value);
46 int axspi_read_status(struct axspi_data *ax_spi, struct spi_status *status);
47 int axspi_wakeup(struct axspi_data *ax_spi);
48
AX_READ(struct axspi_data * ax_spi,u8 offset)49 static inline u16 AX_READ(struct axspi_data *ax_spi, u8 offset)
50 {
51 return axspi_read_reg(ax_spi, offset);
52 }
53
AX_WRITE(struct axspi_data * ax_spi,u16 value,u8 offset)54 static inline int AX_WRITE(struct axspi_data *ax_spi, u16 value, u8 offset)
55 {
56 return axspi_write_reg(ax_spi, offset, value);
57 }
58
AX_READ_STATUS(struct axspi_data * ax_spi,struct spi_status * status)59 static 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
AX_WAKEUP(struct axspi_data * ax_spi)65 static inline int AX_WAKEUP(struct axspi_data *ax_spi)
66 {
67 return axspi_wakeup(ax_spi);
68 }
69 #endif
70