356eebb2b3
We often want to set or clear a flag in an MDIO register, but avoid writing if no change is required since this can have side-effects. Encapsulate this in a function, mdio_clause45_set_flag(). Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
267 lines
8.8 KiB
C
267 lines
8.8 KiB
C
/****************************************************************************
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* Driver for Solarflare Solarstorm network controllers and boards
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* Copyright 2006-2008 Solarflare Communications Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation, incorporated herein by reference.
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*/
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#ifndef EFX_MDIO_10G_H
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#define EFX_MDIO_10G_H
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/*
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* Definitions needed for doing 10G MDIO as specified in clause 45
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* MDIO, which do not appear in Linux yet. Also some helper functions.
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*/
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#include "efx.h"
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#include "boards.h"
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/* Numbering of the MDIO Manageable Devices (MMDs) */
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/* Physical Medium Attachment/ Physical Medium Dependent sublayer */
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#define MDIO_MMD_PMAPMD (1)
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/* WAN Interface Sublayer */
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#define MDIO_MMD_WIS (2)
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/* Physical Coding Sublayer */
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#define MDIO_MMD_PCS (3)
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/* PHY Extender Sublayer */
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#define MDIO_MMD_PHYXS (4)
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/* Extender Sublayer */
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#define MDIO_MMD_DTEXS (5)
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/* Transmission convergence */
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#define MDIO_MMD_TC (6)
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/* Auto negotiation */
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#define MDIO_MMD_AN (7)
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/* Generic register locations */
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#define MDIO_MMDREG_CTRL1 (0)
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#define MDIO_MMDREG_STAT1 (1)
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#define MDIO_MMDREG_IDHI (2)
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#define MDIO_MMDREG_IDLOW (3)
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#define MDIO_MMDREG_SPEED (4)
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#define MDIO_MMDREG_DEVS0 (5)
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#define MDIO_MMDREG_DEVS1 (6)
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#define MDIO_MMDREG_CTRL2 (7)
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#define MDIO_MMDREG_STAT2 (8)
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#define MDIO_MMDREG_TXDIS (9)
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/* Bits in MMDREG_CTRL1 */
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/* Reset */
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#define MDIO_MMDREG_CTRL1_RESET_LBN (15)
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#define MDIO_MMDREG_CTRL1_RESET_WIDTH (1)
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/* Loopback */
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/* Loopback bit for WIS, PCS, PHYSX and DTEXS */
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#define MDIO_MMDREG_CTRL1_LBACK_LBN (14)
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#define MDIO_MMDREG_CTRL1_LBACK_WIDTH (1)
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/* Low power */
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#define MDIO_MMDREG_CTRL1_LPOWER_LBN (11)
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#define MDIO_MMDREG_CTRL1_LPOWER_WIDTH (1)
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/* Bits in MMDREG_STAT1 */
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#define MDIO_MMDREG_STAT1_FAULT_LBN (7)
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#define MDIO_MMDREG_STAT1_FAULT_WIDTH (1)
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/* Link state */
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#define MDIO_MMDREG_STAT1_LINK_LBN (2)
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#define MDIO_MMDREG_STAT1_LINK_WIDTH (1)
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/* Low power ability */
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#define MDIO_MMDREG_STAT1_LPABLE_LBN (1)
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#define MDIO_MMDREG_STAT1_LPABLE_WIDTH (1)
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/* Bits in ID reg */
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#define MDIO_ID_REV(_id32) (_id32 & 0xf)
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#define MDIO_ID_MODEL(_id32) ((_id32 >> 4) & 0x3f)
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#define MDIO_ID_OUI(_id32) (_id32 >> 10)
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/* Bits in MMDREG_DEVS0/1. Someone thoughtfully layed things out
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* so the 'bit present' bit number of an MMD is the number of
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* that MMD */
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#define DEV_PRESENT_BIT(_b) (1 << _b)
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#define MDIO_MMDREG_DEVS_PHYXS DEV_PRESENT_BIT(MDIO_MMD_PHYXS)
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#define MDIO_MMDREG_DEVS_PCS DEV_PRESENT_BIT(MDIO_MMD_PCS)
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#define MDIO_MMDREG_DEVS_PMAPMD DEV_PRESENT_BIT(MDIO_MMD_PMAPMD)
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/* Bits in MMDREG_STAT2 */
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#define MDIO_MMDREG_STAT2_PRESENT_VAL (2)
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#define MDIO_MMDREG_STAT2_PRESENT_LBN (14)
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#define MDIO_MMDREG_STAT2_PRESENT_WIDTH (2)
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/* Bits in MMDREG_TXDIS */
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#define MDIO_MMDREG_TXDIS_GLOBAL_LBN (0)
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#define MDIO_MMDREG_TXDIS_GLOBAL_WIDTH (1)
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/* MMD-specific bits, ordered by MMD, then register */
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#define MDIO_PMAPMD_CTRL1_LBACK_LBN (0)
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#define MDIO_PMAPMD_CTRL1_LBACK_WIDTH (1)
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/* PMA type (4 bits) */
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#define MDIO_PMAPMD_CTRL2_10G_CX4 (0x0)
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#define MDIO_PMAPMD_CTRL2_10G_EW (0x1)
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#define MDIO_PMAPMD_CTRL2_10G_LW (0x2)
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#define MDIO_PMAPMD_CTRL2_10G_SW (0x3)
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#define MDIO_PMAPMD_CTRL2_10G_LX4 (0x4)
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#define MDIO_PMAPMD_CTRL2_10G_ER (0x5)
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#define MDIO_PMAPMD_CTRL2_10G_LR (0x6)
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#define MDIO_PMAPMD_CTRL2_10G_SR (0x7)
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/* Reserved */
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#define MDIO_PMAPMD_CTRL2_10G_BT (0x9)
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/* Reserved */
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/* Reserved */
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#define MDIO_PMAPMD_CTRL2_1G_BT (0xc)
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/* Reserved */
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#define MDIO_PMAPMD_CTRL2_100_BT (0xe)
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#define MDIO_PMAPMD_CTRL2_10_BT (0xf)
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#define MDIO_PMAPMD_CTRL2_TYPE_MASK (0xf)
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/* PHY XGXS lane state */
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#define MDIO_PHYXS_LANE_STATE (0x18)
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#define MDIO_PHYXS_LANE_ALIGNED_LBN (12)
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/* AN registers */
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#define MDIO_AN_STATUS (1)
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#define MDIO_AN_STATUS_XNP_LBN (7)
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#define MDIO_AN_STATUS_PAGE_LBN (6)
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#define MDIO_AN_STATUS_AN_DONE_LBN (5)
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#define MDIO_AN_STATUS_LP_AN_CAP_LBN (0)
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#define MDIO_AN_10GBT_STATUS (33)
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#define MDIO_AN_10GBT_STATUS_MS_FLT_LBN (15) /* MASTER/SLAVE config fault */
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#define MDIO_AN_10GBT_STATUS_MS_LBN (14) /* MASTER/SLAVE config */
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#define MDIO_AN_10GBT_STATUS_LOC_OK_LBN (13) /* Local OK */
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#define MDIO_AN_10GBT_STATUS_REM_OK_LBN (12) /* Remote OK */
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#define MDIO_AN_10GBT_STATUS_LP_10G_LBN (11) /* Link partner is 10GBT capable */
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#define MDIO_AN_10GBT_STATUS_LP_LTA_LBN (10) /* LP loop timing ability */
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#define MDIO_AN_10GBT_STATUS_LP_TRR_LBN (9) /* LP Training Reset Request */
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/* Packing of the prt and dev arguments of clause 45 style MDIO into a
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* single int so they can be passed into the mdio_read/write functions
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* that currently exist. Note that as Falcon is the only current user,
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* the packed form is chosen to match what Falcon needs to write into
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* a register. This is checked at compile-time so do not change it. If
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* your target chip needs things layed out differently you will need
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* to unpack the arguments in your chip-specific mdio functions.
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*/
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/* These are defined by the standard. */
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#define MDIO45_PRT_ID_WIDTH (5)
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#define MDIO45_DEV_ID_WIDTH (5)
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/* The prt ID is just packed in immediately to the left of the dev ID */
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#define MDIO45_PRT_DEV_WIDTH (MDIO45_PRT_ID_WIDTH + MDIO45_DEV_ID_WIDTH)
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#define MDIO45_PRT_ID_MASK ((1 << MDIO45_PRT_DEV_WIDTH) - 1)
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/* This is the prt + dev extended by 1 bit to hold the 'is clause 45' flag. */
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#define MDIO45_XPRT_ID_WIDTH (MDIO45_PRT_DEV_WIDTH + 1)
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#define MDIO45_XPRT_ID_MASK ((1 << MDIO45_XPRT_ID_WIDTH) - 1)
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#define MDIO45_XPRT_ID_IS10G (1 << (MDIO45_XPRT_ID_WIDTH - 1))
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#define MDIO45_PRT_ID_COMP_LBN MDIO45_DEV_ID_WIDTH
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#define MDIO45_PRT_ID_COMP_WIDTH MDIO45_PRT_ID_WIDTH
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#define MDIO45_DEV_ID_COMP_LBN 0
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#define MDIO45_DEV_ID_COMP_WIDTH MDIO45_DEV_ID_WIDTH
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/* Compose port and device into a phy_id */
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static inline int mdio_clause45_pack(u8 prt, u8 dev)
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{
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efx_dword_t phy_id;
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EFX_POPULATE_DWORD_2(phy_id, MDIO45_PRT_ID_COMP, prt,
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MDIO45_DEV_ID_COMP, dev);
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return MDIO45_XPRT_ID_IS10G | EFX_DWORD_VAL(phy_id);
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}
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static inline void mdio_clause45_unpack(u32 val, u8 *prt, u8 *dev)
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{
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efx_dword_t phy_id;
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EFX_POPULATE_DWORD_1(phy_id, EFX_DWORD_0, val);
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*prt = EFX_DWORD_FIELD(phy_id, MDIO45_PRT_ID_COMP);
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*dev = EFX_DWORD_FIELD(phy_id, MDIO45_DEV_ID_COMP);
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}
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static inline int mdio_clause45_read(struct efx_nic *efx,
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u8 prt, u8 dev, u16 addr)
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{
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return efx->mii.mdio_read(efx->net_dev,
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mdio_clause45_pack(prt, dev), addr);
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}
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static inline void mdio_clause45_write(struct efx_nic *efx,
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u8 prt, u8 dev, u16 addr, int value)
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{
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efx->mii.mdio_write(efx->net_dev,
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mdio_clause45_pack(prt, dev), addr, value);
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}
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static inline u32 mdio_clause45_read_id(struct efx_nic *efx, int mmd)
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{
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int phy_id = efx->mii.phy_id;
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u16 id_low = mdio_clause45_read(efx, phy_id, mmd, MDIO_MMDREG_IDLOW);
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u16 id_hi = mdio_clause45_read(efx, phy_id, mmd, MDIO_MMDREG_IDHI);
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return (id_hi << 16) | (id_low);
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}
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static inline bool mdio_clause45_phyxgxs_lane_sync(struct efx_nic *efx)
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{
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int i, lane_status;
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bool sync;
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for (i = 0; i < 2; ++i)
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lane_status = mdio_clause45_read(efx, efx->mii.phy_id,
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MDIO_MMD_PHYXS,
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MDIO_PHYXS_LANE_STATE);
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sync = !!(lane_status & (1 << MDIO_PHYXS_LANE_ALIGNED_LBN));
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if (!sync)
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EFX_LOG(efx, "XGXS lane status: %x\n", lane_status);
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return sync;
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}
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extern const char *mdio_clause45_mmd_name(int mmd);
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/*
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* Reset a specific MMD and wait for reset to clear.
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* Return number of spins left (>0) on success, -%ETIMEDOUT on failure.
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*
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* This function will sleep
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*/
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extern int mdio_clause45_reset_mmd(struct efx_nic *efx, int mmd,
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int spins, int spintime);
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/* As mdio_clause45_check_mmd but for multiple MMDs */
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int mdio_clause45_check_mmds(struct efx_nic *efx,
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unsigned int mmd_mask, unsigned int fatal_mask);
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/* Check the link status of specified mmds in bit mask */
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extern bool mdio_clause45_links_ok(struct efx_nic *efx,
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unsigned int mmd_mask);
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/* Generic transmit disable support though PMAPMD */
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extern void mdio_clause45_transmit_disable(struct efx_nic *efx);
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/* Generic part of reconfigure: set/clear loopback bits */
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extern void mdio_clause45_phy_reconfigure(struct efx_nic *efx);
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/* Set the power state of the specified MMDs */
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extern void mdio_clause45_set_mmds_lpower(struct efx_nic *efx,
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int low_power, unsigned int mmd_mask);
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/* Read (some of) the PHY settings over MDIO */
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extern void mdio_clause45_get_settings(struct efx_nic *efx,
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struct ethtool_cmd *ecmd);
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/* Set (some of) the PHY settings over MDIO */
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extern int mdio_clause45_set_settings(struct efx_nic *efx,
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struct ethtool_cmd *ecmd);
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/* Wait for specified MMDs to exit reset within a timeout */
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extern int mdio_clause45_wait_reset_mmds(struct efx_nic *efx,
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unsigned int mmd_mask);
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/* Set or clear flag, debouncing */
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extern void mdio_clause45_set_flag(struct efx_nic *efx, u8 prt, u8 dev,
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u16 addr, int bit, bool sense);
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#endif /* EFX_MDIO_10G_H */
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