LXR linux/drivers/net/ethernet/sfc/mdio

   1/****************************************************************************
   2 * Driver for Solarflare 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
  21static inline unsigned efx_mdio_id_rev(u32 id) { return id & 0xf; }
  22static inline unsigned efx_mdio_id_model(u32 id) { return (id >> 4) & 0x3f; }
  23extern unsigned efx_mdio_id_oui(u32 id);
  24
  25static 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
  30static inline void
  31efx_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
  36static 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
  43static 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
  59extern 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 */
  67extern 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 */
  71int efx_mdio_check_mmds(struct efx_nic *efx, unsigned int mmd_mask);
  72
  73/* Check the link status of specified mmds in bit mask */
  74extern bool efx_mdio_links_ok(struct efx_nic *efx, unsigned int mmd_mask);
  75
  76/* Generic transmit disable support though PMAPMD */
  77extern void efx_mdio_transmit_disable(struct efx_nic *efx);
  78
  79/* Generic part of reconfigure: set/clear loopback bits */
  80extern void efx_mdio_phy_reconfigure(struct efx_nic *efx);
  81
  82/* Set the power state of the specified MMDs */
  83extern 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 */
  87extern int efx_mdio_set_settings(struct efx_nic *efx, struct ethtool_cmd *ecmd);
  88
  89/* Push advertising flags and restart autonegotiation */
  90extern 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 */
  95u8 efx_mdio_get_pause(struct efx_nic *efx);
  96
  97/* Wait for specified MMDs to exit reset within a timeout */
  98extern int efx_mdio_wait_reset_mmds(struct efx_nic *efx,
  99                                    unsigned int mmd_mask);
 100
 101/* Set or clear flag, debouncing */
 102static inline void
 103efx_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 */
 110extern int efx_mdio_test_alive(struct efx_nic *efx);
 111
 112#endif /* EFX_MDIO_10G_H */
 113