drivers/net/ethernet/sfc/mdio_10g.h

   1 /****************************************************************************
   2  * Driver for Solarflare Solarstorm network controllers and boards
   3  * Copyright 2006-2011 Solarflare Communications Inc.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 as published
   7  * by the Free Software Foundation, incorporated herein by reference.
   8  */
   9
  10 #ifndef EFX_MDIO_10G_H
  11 #define EFX_MDIO_10G_H
  12
  13 #include <linux/mdio.h>
  14
  15 /*
  16  * Helper functions for doing 10G MDIO as specified in IEEE 802.3 clause 45.
  17  */
  18
  19 #include "efx.h"
  20
  21 static inline unsigned efx_mdio_id_rev(u32 id) { return id & 0xf; }
  22 static inline unsigned efx_mdio_id_model(u32 id) { return (id >> 4) & 0x3f; }
  23 extern unsigned efx_mdio_id_oui(u32 id);
  24
  25 static inline int efx_mdio_read(struct efx_nic *efx, int devad, int addr)
  26 {
  27         return efx->mdio.mdio_read(efx->net_dev, efx->mdio.prtad, devad, addr);
  28 }
  29
  30 static inline void
  31 efx_mdio_write(struct efx_nic *efx, int devad, int addr, int value)
  32 {
  33         efx->mdio.mdio_write(efx->net_dev, efx->mdio.prtad, devad, addr, value);
  34 }
  35
  36 static inline u32 efx_mdio_read_id(struct efx_nic *efx, int mmd)
  37 {
  38         u16 id_low = efx_mdio_read(efx, mmd, MDIO_DEVID2);
  39         u16 id_hi = efx_mdio_read(efx, mmd, MDIO_DEVID1);
  40         return (id_hi << 16) | (id_low);
  41 }
  42
  43 static inline bool efx_mdio_phyxgxs_lane_sync(struct efx_nic *efx)
  44 {
  45         int i, lane_status;
  46         bool sync;
  47
  48         for (i = 0; i < 2; ++i)
  49                 lane_status = efx_mdio_read(efx, MDIO_MMD_PHYXS,
  50                                             MDIO_PHYXS_LNSTAT);
  51
  52         sync = !!(lane_status & MDIO_PHYXS_LNSTAT_ALIGN);
  53         if (!sync)
  54                 netif_dbg(efx, hw, efx->net_dev, "XGXS lane status: %x\n",
  55                           lane_status);
  56         return sync;
  57 }
  58
  59 extern const char *efx_mdio_mmd_name(int mmd);
  60
  61 /*
  62  * Reset a specific MMD and wait for reset to clear.
  63  * Return number of spins left (>0) on success, -%ETIMEDOUT on failure.
  64  *
  65  * This function will sleep
  66  */
  67 extern int efx_mdio_reset_mmd(struct efx_nic *efx, int mmd,
  68                               int spins, int spintime);
  69
  70 /* As efx_mdio_check_mmd but for multiple MMDs */
  71 int efx_mdio_check_mmds(struct efx_nic *efx, unsigned int mmd_mask);
  72
  73 /* Check the link status of specified mmds in bit mask */
  74 extern bool efx_mdio_links_ok(struct efx_nic *efx, unsigned int mmd_mask);
  75
  76 /* Generic transmit disable support though PMAPMD */
  77 extern void efx_mdio_transmit_disable(struct efx_nic *efx);
  78
  79 /* Generic part of reconfigure: set/clear loopback bits */
  80 extern void efx_mdio_phy_reconfigure(struct efx_nic *efx);
  81
  82 /* Set the power state of the specified MMDs */
  83 extern void efx_mdio_set_mmds_lpower(struct efx_nic *efx,
  84                                      int low_power, unsigned int mmd_mask);
  85
  86 /* Set (some of) the PHY settings over MDIO */
  87 extern int efx_mdio_set_settings(struct efx_nic *efx, struct ethtool_cmd *ecmd);
  88
  89 /* Push advertising flags and restart autonegotiation */
  90 extern void efx_mdio_an_reconfigure(struct efx_nic *efx);
  91
  92 /* Get pause parameters from AN if available (otherwise return
  93  * requested pause parameters)
  94  */
  95 u8 efx_mdio_get_pause(struct efx_nic *efx);
  96
  97 /* Wait for specified MMDs to exit reset within a timeout */
  98 extern int efx_mdio_wait_reset_mmds(struct efx_nic *efx,
  99                                     unsigned int mmd_mask);
 100
 101 /* Set or clear flag, debouncing */
 102 static inline void
 103 efx_mdio_set_flag(struct efx_nic *efx, int devad, int addr,
 104                   int mask, bool state)
 105 {
 106         mdio_set_flag(&efx->mdio, efx->mdio.prtad, devad, addr, mask, state);
 107 }
 108
 109 /* Liveness self-test for MDIO PHYs */
 110 extern int efx_mdio_test_alive(struct efx_nic *efx);
 111
 112 #endif /* EFX_MDIO_10G_H */