drivers/net/dsa/microchip/ksz_spi.h

   1 /* SPDX-License-Identifier: GPL-2.0
   2  * Microchip KSZ series SPI access common header
   3  *
   4  * Copyright (C) 2017-2018 Microchip Technology Inc.
   5  *      Tristram Ha <Tristram.Ha@microchip.com>
   6  */
   7
   8 #ifndef __KSZ_SPI_H
   9 #define __KSZ_SPI_H
  10
  11 /* Chip dependent SPI access */
  12 static int ksz_spi_read(struct ksz_device *dev, u32 reg, u8 *data,
  13                         unsigned int len);
  14 static int ksz_spi_write(struct ksz_device *dev, u32 reg, void *data,
  15                          unsigned int len);
  16
  17 static int ksz_spi_read8(struct ksz_device *dev, u32 reg, u8 *val)
  18 {
  19         return ksz_spi_read(dev, reg, val, 1);
  20 }
  21
  22 static int ksz_spi_read16(struct ksz_device *dev, u32 reg, u16 *val)
  23 {
  24         int ret = ksz_spi_read(dev, reg, (u8 *)val, 2);
  25
  26         if (!ret)
  27                 *val = be16_to_cpu(*val);
  28
  29         return ret;
  30 }
  31
  32 static int ksz_spi_read32(struct ksz_device *dev, u32 reg, u32 *val)
  33 {
  34         int ret = ksz_spi_read(dev, reg, (u8 *)val, 4);
  35
  36         if (!ret)
  37                 *val = be32_to_cpu(*val);
  38
  39         return ret;
  40 }
  41
  42 static int ksz_spi_write8(struct ksz_device *dev, u32 reg, u8 value)
  43 {
  44         return ksz_spi_write(dev, reg, &value, 1);
  45 }
  46
  47 static int ksz_spi_write16(struct ksz_device *dev, u32 reg, u16 value)
  48 {
  49         value = cpu_to_be16(value);
  50         return ksz_spi_write(dev, reg, &value, 2);
  51 }
  52
  53 static int ksz_spi_write32(struct ksz_device *dev, u32 reg, u32 value)
  54 {
  55         value = cpu_to_be32(value);
  56         return ksz_spi_write(dev, reg, &value, 4);
  57 }
  58
  59 static int ksz_spi_get(struct ksz_device *dev, u32 reg, void *data, size_t len)
  60 {
  61         return ksz_spi_read(dev, reg, data, len);
  62 }
  63
  64 static int ksz_spi_set(struct ksz_device *dev, u32 reg, void *data, size_t len)
  65 {
  66         return ksz_spi_write(dev, reg, data, len);
  67 }
  68
  69 #endif