drivers/net/phy/mdio-cavium.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Copyright (C) 2009-2016 Cavium, Inc.
   4  */
   5
   6 enum cavium_mdiobus_mode {
   7         UNINIT = 0,
   8         C22,
   9         C45
  10 };
  11
  12 #define SMI_CMD         0x0
  13 #define SMI_WR_DAT      0x8
  14 #define SMI_RD_DAT      0x10
  15 #define SMI_CLK         0x18
  16 #define SMI_EN          0x20
  17
  18 #ifdef __BIG_ENDIAN_BITFIELD
  19 #define OCT_MDIO_BITFIELD_FIELD(field, more)    \
  20         field;                                  \
  21         more
  22
  23 #else
  24 #define OCT_MDIO_BITFIELD_FIELD(field, more)    \
  25         more                                    \
  26         field;
  27
  28 #endif
  29
  30 union cvmx_smix_clk {
  31         u64 u64;
  32         struct cvmx_smix_clk_s {
  33           OCT_MDIO_BITFIELD_FIELD(u64 reserved_25_63:39,
  34           OCT_MDIO_BITFIELD_FIELD(u64 mode:1,
  35           OCT_MDIO_BITFIELD_FIELD(u64 reserved_21_23:3,
  36           OCT_MDIO_BITFIELD_FIELD(u64 sample_hi:5,
  37           OCT_MDIO_BITFIELD_FIELD(u64 sample_mode:1,
  38           OCT_MDIO_BITFIELD_FIELD(u64 reserved_14_14:1,
  39           OCT_MDIO_BITFIELD_FIELD(u64 clk_idle:1,
  40           OCT_MDIO_BITFIELD_FIELD(u64 preamble:1,
  41           OCT_MDIO_BITFIELD_FIELD(u64 sample:4,
  42           OCT_MDIO_BITFIELD_FIELD(u64 phase:8,
  43           ;))))))))))
  44         } s;
  45 };
  46
  47 union cvmx_smix_cmd {
  48         u64 u64;
  49         struct cvmx_smix_cmd_s {
  50           OCT_MDIO_BITFIELD_FIELD(u64 reserved_18_63:46,
  51           OCT_MDIO_BITFIELD_FIELD(u64 phy_op:2,
  52           OCT_MDIO_BITFIELD_FIELD(u64 reserved_13_15:3,
  53           OCT_MDIO_BITFIELD_FIELD(u64 phy_adr:5,
  54           OCT_MDIO_BITFIELD_FIELD(u64 reserved_5_7:3,
  55           OCT_MDIO_BITFIELD_FIELD(u64 reg_adr:5,
  56           ;))))))
  57         } s;
  58 };
  59
  60 union cvmx_smix_en {
  61         u64 u64;
  62         struct cvmx_smix_en_s {
  63           OCT_MDIO_BITFIELD_FIELD(u64 reserved_1_63:63,
  64           OCT_MDIO_BITFIELD_FIELD(u64 en:1,
  65           ;))
  66         } s;
  67 };
  68
  69 union cvmx_smix_rd_dat {
  70         u64 u64;
  71         struct cvmx_smix_rd_dat_s {
  72           OCT_MDIO_BITFIELD_FIELD(u64 reserved_18_63:46,
  73           OCT_MDIO_BITFIELD_FIELD(u64 pending:1,
  74           OCT_MDIO_BITFIELD_FIELD(u64 val:1,
  75           OCT_MDIO_BITFIELD_FIELD(u64 dat:16,
  76           ;))))
  77         } s;
  78 };
  79
  80 union cvmx_smix_wr_dat {
  81         u64 u64;
  82         struct cvmx_smix_wr_dat_s {
  83           OCT_MDIO_BITFIELD_FIELD(u64 reserved_18_63:46,
  84           OCT_MDIO_BITFIELD_FIELD(u64 pending:1,
  85           OCT_MDIO_BITFIELD_FIELD(u64 val:1,
  86           OCT_MDIO_BITFIELD_FIELD(u64 dat:16,
  87           ;))))
  88         } s;
  89 };
  90
  91 struct cavium_mdiobus {
  92         struct mii_bus *mii_bus;
  93         u64 register_base;
  94         enum cavium_mdiobus_mode mode;
  95 };
  96
  97 #ifdef CONFIG_CAVIUM_OCTEON_SOC
  98
  99 #include <asm/octeon/octeon.h>
 100
 101 static inline void oct_mdio_writeq(u64 val, u64 addr)
 102 {
 103         cvmx_write_csr(addr, val);
 104 }
 105
 106 static inline u64 oct_mdio_readq(u64 addr)
 107 {
 108         return cvmx_read_csr(addr);
 109 }
 110 #else
 111 #include <linux/io-64-nonatomic-lo-hi.h>
 112
 113 #define oct_mdio_writeq(val, addr)      writeq(val, (void *)addr)
 114 #define oct_mdio_readq(addr)            readq((void *)addr)
 115 #endif
 116
 117 int cavium_mdiobus_read(struct mii_bus *bus, int phy_id, int regnum);
 118 int cavium_mdiobus_write(struct mii_bus *bus, int phy_id, int regnum, u16 val);