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mdio_10g.h
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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,
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 */