Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-12-22 10:56:40 +00:00
Code Issues Packages Projects Releases Wiki Activity
356eebb2b3
linux/drivers/net/sfc/mdio_10g.h
Ben Hutchings 356eebb2b3 sfc: Clean up MDIO flag setting 
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>
2008-12-12 21:58:16 -08:00

267 lines
8.8 KiB
C
Raw Blame History

/****************************************************************************
* Driver for Solarflare Solarstorm network controllers and boards
* Copyright 2006-2008 Solarflare Communications Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation, incorporated herein by reference.
*/
#ifndef EFX_MDIO_10G_H
#define EFX_MDIO_10G_H
/*
* Definitions needed for doing 10G MDIO as specified in clause 45
* MDIO, which do not appear in Linux yet. Also some helper functions.
*/
#include "efx.h"
#include "boards.h"
/* Numbering of the MDIO Manageable Devices (MMDs) */
/* Physical Medium Attachment/ Physical Medium Dependent sublayer */
#define MDIO_MMD_PMAPMD (1)
/* WAN Interface Sublayer */
#define MDIO_MMD_WIS (2)
/* Physical Coding Sublayer */
#define MDIO_MMD_PCS (3)
/* PHY Extender Sublayer */
#define MDIO_MMD_PHYXS (4)
/* Extender Sublayer */
#define MDIO_MMD_DTEXS (5)
/* Transmission convergence */
#define MDIO_MMD_TC (6)
/* Auto negotiation */
#define MDIO_MMD_AN (7)
/* Generic register locations */
#define MDIO_MMDREG_CTRL1 (0)
#define MDIO_MMDREG_STAT1 (1)
#define MDIO_MMDREG_IDHI (2)
#define MDIO_MMDREG_IDLOW (3)
#define MDIO_MMDREG_SPEED (4)
#define MDIO_MMDREG_DEVS0 (5)
#define MDIO_MMDREG_DEVS1 (6)
#define MDIO_MMDREG_CTRL2 (7)
#define MDIO_MMDREG_STAT2 (8)
#define MDIO_MMDREG_TXDIS (9)
/* Bits in MMDREG_CTRL1 */
/* Reset */
#define MDIO_MMDREG_CTRL1_RESET_LBN (15)
#define MDIO_MMDREG_CTRL1_RESET_WIDTH (1)
/* Loopback */
/* Loopback bit for WIS, PCS, PHYSX and DTEXS */
#define MDIO_MMDREG_CTRL1_LBACK_LBN (14)
#define MDIO_MMDREG_CTRL1_LBACK_WIDTH (1)
/* Low power */
#define MDIO_MMDREG_CTRL1_LPOWER_LBN (11)
#define MDIO_MMDREG_CTRL1_LPOWER_WIDTH (1)
/* Bits in MMDREG_STAT1 */
#define MDIO_MMDREG_STAT1_FAULT_LBN (7)
#define MDIO_MMDREG_STAT1_FAULT_WIDTH (1)
/* Link state */
#define MDIO_MMDREG_STAT1_LINK_LBN (2)
#define MDIO_MMDREG_STAT1_LINK_WIDTH (1)
/* Low power ability */
#define MDIO_MMDREG_STAT1_LPABLE_LBN (1)
#define MDIO_MMDREG_STAT1_LPABLE_WIDTH (1)
/* Bits in ID reg */
#define MDIO_ID_REV(_id32) (_id32 & 0xf)
#define MDIO_ID_MODEL(_id32) ((_id32 >> 4) & 0x3f)
#define MDIO_ID_OUI(_id32) (_id32 >> 10)
/* Bits in MMDREG_DEVS0/1. Someone thoughtfully layed things out
* so the 'bit present' bit number of an MMD is the number of
* that MMD */
#define DEV_PRESENT_BIT(_b) (1 << _b)
#define MDIO_MMDREG_DEVS_PHYXS DEV_PRESENT_BIT(MDIO_MMD_PHYXS)
#define MDIO_MMDREG_DEVS_PCS DEV_PRESENT_BIT(MDIO_MMD_PCS)
#define MDIO_MMDREG_DEVS_PMAPMD DEV_PRESENT_BIT(MDIO_MMD_PMAPMD)
/* Bits in MMDREG_STAT2 */
#define MDIO_MMDREG_STAT2_PRESENT_VAL (2)
#define MDIO_MMDREG_STAT2_PRESENT_LBN (14)
#define MDIO_MMDREG_STAT2_PRESENT_WIDTH (2)
/* Bits in MMDREG_TXDIS */
#define MDIO_MMDREG_TXDIS_GLOBAL_LBN (0)
#define MDIO_MMDREG_TXDIS_GLOBAL_WIDTH (1)
/* MMD-specific bits, ordered by MMD, then register */
#define MDIO_PMAPMD_CTRL1_LBACK_LBN (0)
#define MDIO_PMAPMD_CTRL1_LBACK_WIDTH (1)
/* PMA type (4 bits) */
#define MDIO_PMAPMD_CTRL2_10G_CX4 (0x0)
#define MDIO_PMAPMD_CTRL2_10G_EW (0x1)
#define MDIO_PMAPMD_CTRL2_10G_LW (0x2)
#define MDIO_PMAPMD_CTRL2_10G_SW (0x3)
#define MDIO_PMAPMD_CTRL2_10G_LX4 (0x4)
#define MDIO_PMAPMD_CTRL2_10G_ER (0x5)
#define MDIO_PMAPMD_CTRL2_10G_LR (0x6)
#define MDIO_PMAPMD_CTRL2_10G_SR (0x7)
/* Reserved */
#define MDIO_PMAPMD_CTRL2_10G_BT (0x9)
/* Reserved */
/* Reserved */
#define MDIO_PMAPMD_CTRL2_1G_BT (0xc)
/* Reserved */
#define MDIO_PMAPMD_CTRL2_100_BT (0xe)
#define MDIO_PMAPMD_CTRL2_10_BT (0xf)
#define MDIO_PMAPMD_CTRL2_TYPE_MASK (0xf)
/* PHY XGXS lane state */
#define MDIO_PHYXS_LANE_STATE (0x18)
#define MDIO_PHYXS_LANE_ALIGNED_LBN (12)
/* AN registers */
#define MDIO_AN_STATUS (1)
#define MDIO_AN_STATUS_XNP_LBN (7)
#define MDIO_AN_STATUS_PAGE_LBN (6)
#define MDIO_AN_STATUS_AN_DONE_LBN (5)
#define MDIO_AN_STATUS_LP_AN_CAP_LBN (0)
#define MDIO_AN_10GBT_STATUS (33)
#define MDIO_AN_10GBT_STATUS_MS_FLT_LBN (15) /* MASTER/SLAVE config fault */
#define MDIO_AN_10GBT_STATUS_MS_LBN (14) /* MASTER/SLAVE config */
#define MDIO_AN_10GBT_STATUS_LOC_OK_LBN (13) /* Local OK */
#define MDIO_AN_10GBT_STATUS_REM_OK_LBN (12) /* Remote OK */
#define MDIO_AN_10GBT_STATUS_LP_10G_LBN (11) /* Link partner is 10GBT capable */
#define MDIO_AN_10GBT_STATUS_LP_LTA_LBN (10) /* LP loop timing ability */
#define MDIO_AN_10GBT_STATUS_LP_TRR_LBN (9) /* LP Training Reset Request */
/* Packing of the prt and dev arguments of clause 45 style MDIO into a
* single int so they can be passed into the mdio_read/write functions
* that currently exist. Note that as Falcon is the only current user,
* the packed form is chosen to match what Falcon needs to write into
* a register. This is checked at compile-time so do not change it. If
* your target chip needs things layed out differently you will need
* to unpack the arguments in your chip-specific mdio functions.
*/
/* These are defined by the standard. */
#define MDIO45_PRT_ID_WIDTH (5)
#define MDIO45_DEV_ID_WIDTH (5)
/* The prt ID is just packed in immediately to the left of the dev ID */
#define MDIO45_PRT_DEV_WIDTH (MDIO45_PRT_ID_WIDTH + MDIO45_DEV_ID_WIDTH)
#define MDIO45_PRT_ID_MASK ((1 << MDIO45_PRT_DEV_WIDTH) - 1)
/* This is the prt + dev extended by 1 bit to hold the 'is clause 45' flag. */
#define MDIO45_XPRT_ID_WIDTH (MDIO45_PRT_DEV_WIDTH + 1)
#define MDIO45_XPRT_ID_MASK ((1 << MDIO45_XPRT_ID_WIDTH) - 1)
#define MDIO45_XPRT_ID_IS10G (1 << (MDIO45_XPRT_ID_WIDTH - 1))
#define MDIO45_PRT_ID_COMP_LBN MDIO45_DEV_ID_WIDTH
#define MDIO45_PRT_ID_COMP_WIDTH MDIO45_PRT_ID_WIDTH
#define MDIO45_DEV_ID_COMP_LBN 0
#define MDIO45_DEV_ID_COMP_WIDTH MDIO45_DEV_ID_WIDTH
/* Compose port and device into a phy_id */
static inline int mdio_clause45_pack(u8 prt, u8 dev)
{
efx_dword_t phy_id;
EFX_POPULATE_DWORD_2(phy_id, MDIO45_PRT_ID_COMP, prt,
MDIO45_DEV_ID_COMP, dev);
return MDIO45_XPRT_ID_IS10G | EFX_DWORD_VAL(phy_id);
}
static inline void mdio_clause45_unpack(u32 val, u8 *prt, u8 *dev)
{
efx_dword_t phy_id;
EFX_POPULATE_DWORD_1(phy_id, EFX_DWORD_0, val);
*prt = EFX_DWORD_FIELD(phy_id, MDIO45_PRT_ID_COMP);
*dev = EFX_DWORD_FIELD(phy_id, MDIO45_DEV_ID_COMP);
}
static inline int mdio_clause45_read(struct efx_nic *efx,
u8 prt, u8 dev, u16 addr)
{
return efx->mii.mdio_read(efx->net_dev,
mdio_clause45_pack(prt, dev), addr);
}
static inline void mdio_clause45_write(struct efx_nic *efx,
u8 prt, u8 dev, u16 addr, int value)
{
efx->mii.mdio_write(efx->net_dev,
mdio_clause45_pack(prt, dev), addr, value);
}
static inline u32 mdio_clause45_read_id(struct efx_nic *efx, int mmd)
{
int phy_id = efx->mii.phy_id;
u16 id_low = mdio_clause45_read(efx, phy_id, mmd, MDIO_MMDREG_IDLOW);
u16 id_hi = mdio_clause45_read(efx, phy_id, mmd, MDIO_MMDREG_IDHI);
return (id_hi << 16) | (id_low);
}
static inline bool mdio_clause45_phyxgxs_lane_sync(struct efx_nic *efx)
{
int i, lane_status;
bool sync;
for (i = 0; i < 2; ++i)
lane_status = mdio_clause45_read(efx, efx->mii.phy_id,
MDIO_MMD_PHYXS,
MDIO_PHYXS_LANE_STATE);
sync = !!(lane_status & (1 << MDIO_PHYXS_LANE_ALIGNED_LBN));
if (!sync)
EFX_LOG(efx, "XGXS lane status: %x\n", lane_status);
return sync;
}
extern const char *mdio_clause45_mmd_name(int mmd);
/*
* Reset a specific MMD and wait for reset to clear.
* Return number of spins left (>0) on success, -%ETIMEDOUT on failure.
*
* This function will sleep
*/
extern int mdio_clause45_reset_mmd(struct efx_nic *efx, int mmd,
int spins, int spintime);
/* As mdio_clause45_check_mmd but for multiple MMDs */
int mdio_clause45_check_mmds(struct efx_nic *efx,
unsigned int mmd_mask, unsigned int fatal_mask);
/* Check the link status of specified mmds in bit mask */
extern bool mdio_clause45_links_ok(struct efx_nic *efx,
unsigned int mmd_mask);
/* Generic transmit disable support though PMAPMD */
extern void mdio_clause45_transmit_disable(struct efx_nic *efx);
/* Generic part of reconfigure: set/clear loopback bits */
extern void mdio_clause45_phy_reconfigure(struct efx_nic *efx);
/* Set the power state of the specified MMDs */
extern void mdio_clause45_set_mmds_lpower(struct efx_nic *efx,
int low_power, unsigned int mmd_mask);
/* Read (some of) the PHY settings over MDIO */
extern void mdio_clause45_get_settings(struct efx_nic *efx,
struct ethtool_cmd *ecmd);
/* Set (some of) the PHY settings over MDIO */
extern int mdio_clause45_set_settings(struct efx_nic *efx,
struct ethtool_cmd *ecmd);
/* Wait for specified MMDs to exit reset within a timeout */
extern int mdio_clause45_wait_reset_mmds(struct efx_nic *efx,
unsigned int mmd_mask);
/* Set or clear flag, debouncing */
extern void mdio_clause45_set_flag(struct efx_nic *efx, u8 prt, u8 dev,
u16 addr, int bit, bool sense);
#endif /* EFX_MDIO_10G_H */
Reference in New Issue View Git Blame Copy Permalink