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
efx_mdio_id_rev(u32 id)21 static inline unsigned efx_mdio_id_rev(u32 id) { return id & 0xf; }
efx_mdio_id_model(u32 id)22 static inline unsigned efx_mdio_id_model(u32 id) { return (id >> 4) & 0x3f; }
23 extern unsigned efx_mdio_id_oui(u32 id);
24
efx_mdio_read(struct efx_nic * efx,int devad,int addr)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
efx_mdio_write(struct efx_nic * efx,int devad,int addr,int value)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
efx_mdio_read_id(struct efx_nic * efx,int mmd)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
efx_mdio_phyxgxs_lane_sync(struct efx_nic * efx)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 enum efx_fc_type 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
efx_mdio_set_flag(struct efx_nic * efx,int devad,int addr,int mask,bool state)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 */
113