drivers/net/ethernet/asix/ax88796c_spi.h

   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
  49 static inline u16 AX_READ(struct axspi_data *ax_spi, u8 offset)
  50 {
  51         return axspi_read_reg(ax_spi, offset);
  52 }
  53
  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
  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
  65 static inline int AX_WAKEUP(struct axspi_data *ax_spi)
  66 {
  67         return axspi_wakeup(ax_spi);
  68 }
  69 #endif