[deliverable/linux.git] / drivers / net / sfc / mdio_10g.c

/****************************************************************************
 * Driver for Solarflare Solarstorm network controllers and boards
 * Copyright 2006-2009 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.
 */
/*
 * Useful functions for working with MDIO clause 45 PHYs
 */
#include <linux/types.h>
#include <linux/ethtool.h>
#include <linux/delay.h>
#include "net_driver.h"
#include "mdio_10g.h"
#include "workarounds.h"

unsigned efx_mdio_id_oui(u32 id)
{
	unsigned oui = 0;
	int i;

	/* The bits of the OUI are designated a..x, with a=0 and b variable.
	 * In the id register c is the MSB but the OUI is conventionally
	 * written as bytes h..a, p..i, x..q.  Reorder the bits accordingly. */
	for (i = 0; i < 22; ++i)
		if (id & (1 << (i + 10)))
			oui |= 1 << (i ^ 7);

	return oui;
}

int efx_mdio_reset_mmd(struct efx_nic *port, int mmd,
			    int spins, int spintime)
{
	u32 ctrl;

	/* Catch callers passing values in the wrong units (or just silly) */
	EFX_BUG_ON_PARANOID(spins * spintime >= 5000);

	efx_mdio_write(port, mmd, MDIO_CTRL1, MDIO_CTRL1_RESET);
	/* Wait for the reset bit to clear. */
	do {
		msleep(spintime);
		ctrl = efx_mdio_read(port, mmd, MDIO_CTRL1);
		spins--;

	} while (spins && (ctrl & MDIO_CTRL1_RESET));

	return spins ? spins : -ETIMEDOUT;
}

static int efx_mdio_check_mmd(struct efx_nic *efx, int mmd, int fault_fatal)
{
	int status;

	if (LOOPBACK_INTERNAL(efx))
		return 0;

	if (mmd != MDIO_MMD_AN) {
		/* Read MMD STATUS2 to check it is responding. */
		status = efx_mdio_read(efx, mmd, MDIO_STAT2);
		if ((status & MDIO_STAT2_DEVPRST) != MDIO_STAT2_DEVPRST_VAL) {
			netif_err(efx, hw, efx->net_dev,
				  "PHY MMD %d not responding.\n", mmd);
			return -EIO;
		}
	}

	/* Read MMD STATUS 1 to check for fault. */
	status = efx_mdio_read(efx, mmd, MDIO_STAT1);
	if (status & MDIO_STAT1_FAULT) {
		if (fault_fatal) {
			netif_err(efx, hw, efx->net_dev,
				  "PHY MMD %d reporting fatal"
				  " fault: status %x\n", mmd, status);
			return -EIO;
		} else {
			netif_dbg(efx, hw, efx->net_dev,
				  "PHY MMD %d reporting status"
				  " %x (expected)\n", mmd, status);
		}
	}
	return 0;
}

/* This ought to be ridiculous overkill. We expect it to fail rarely */
#define MDIO45_RESET_TIME	1000 /* ms */
#define MDIO45_RESET_ITERS	100

int efx_mdio_wait_reset_mmds(struct efx_nic *efx, unsigned int mmd_mask)
{
	const int spintime = MDIO45_RESET_TIME / MDIO45_RESET_ITERS;
	int tries = MDIO45_RESET_ITERS;
	int rc = 0;
	int in_reset;

	while (tries) {
		int mask = mmd_mask;
		int mmd = 0;
		int stat;
		in_reset = 0;
		while (mask) {
			if (mask & 1) {
				stat = efx_mdio_read(efx, mmd, MDIO_CTRL1);
				if (stat < 0) {
					netif_err(efx, hw, efx->net_dev,
						  "failed to read status of"
						  " MMD %d\n", mmd);
					return -EIO;
				}
				if (stat & MDIO_CTRL1_RESET)
					in_reset |= (1 << mmd);
			}
			mask = mask >> 1;
			mmd++;
		}
		if (!in_reset)
			break;
		tries--;
		msleep(spintime);
	}
	if (in_reset != 0) {
		netif_err(efx, hw, efx->net_dev,
			  "not all MMDs came out of reset in time."
			  " MMDs still in reset: %x\n", in_reset);
		rc = -ETIMEDOUT;
	}
	return rc;
}

int efx_mdio_check_mmds(struct efx_nic *efx,
			unsigned int mmd_mask, unsigned int fatal_mask)
{
	int mmd = 0, probe_mmd, devs1, devs2;
	u32 devices;

	/* Historically we have probed the PHYXS to find out what devices are
	 * present,but that doesn't work so well if the PHYXS isn't expected
	 * to exist, if so just find the first item in the list supplied. */
	probe_mmd = (mmd_mask & MDIO_DEVS_PHYXS) ? MDIO_MMD_PHYXS :
	    __ffs(mmd_mask);

	/* Check all the expected MMDs are present */
	devs1 = efx_mdio_read(efx, probe_mmd, MDIO_DEVS1);
	devs2 = efx_mdio_read(efx, probe_mmd, MDIO_DEVS2);
	if (devs1 < 0 || devs2 < 0) {
		netif_err(efx, hw, efx->net_dev,
			  "failed to read devices present\n");
		return -EIO;
	}
	devices = devs1 | (devs2 << 16);
	if ((devices & mmd_mask) != mmd_mask) {
		netif_err(efx, hw, efx->net_dev,
			  "required MMDs not present: got %x, wanted %x\n",
			  devices, mmd_mask);
		return -ENODEV;
	}
	netif_vdbg(efx, hw, efx->net_dev, "Devices present: %x\n", devices);

	/* Check all required MMDs are responding and happy. */
	while (mmd_mask) {
		if (mmd_mask & 1) {
			int fault_fatal = fatal_mask & 1;
			if (efx_mdio_check_mmd(efx, mmd, fault_fatal))
				return -EIO;
		}
		mmd_mask = mmd_mask >> 1;
		fatal_mask = fatal_mask >> 1;
		mmd++;
	}

	return 0;
}

bool efx_mdio_links_ok(struct efx_nic *efx, unsigned int mmd_mask)
{
	/* If the port is in loopback, then we should only consider a subset
	 * of mmd's */
	if (LOOPBACK_INTERNAL(efx))
		return true;
	else if (LOOPBACK_MASK(efx) & LOOPBACKS_WS)
		return false;
	else if (efx_phy_mode_disabled(efx->phy_mode))
		return false;
	else if (efx->loopback_mode == LOOPBACK_PHYXS)
		mmd_mask &= ~(MDIO_DEVS_PHYXS |
			      MDIO_DEVS_PCS |
			      MDIO_DEVS_PMAPMD |
			      MDIO_DEVS_AN);
	else if (efx->loopback_mode == LOOPBACK_PCS)
		mmd_mask &= ~(MDIO_DEVS_PCS |
			      MDIO_DEVS_PMAPMD |
			      MDIO_DEVS_AN);
	else if (efx->loopback_mode == LOOPBACK_PMAPMD)
		mmd_mask &= ~(MDIO_DEVS_PMAPMD |
			      MDIO_DEVS_AN);

	return mdio45_links_ok(&efx->mdio, mmd_mask);
}

void efx_mdio_transmit_disable(struct efx_nic *efx)
{
	efx_mdio_set_flag(efx, MDIO_MMD_PMAPMD,
			  MDIO_PMA_TXDIS, MDIO_PMD_TXDIS_GLOBAL,
			  efx->phy_mode & PHY_MODE_TX_DISABLED);
}

void efx_mdio_phy_reconfigure(struct efx_nic *efx)
{
	efx_mdio_set_flag(efx, MDIO_MMD_PMAPMD,
			  MDIO_CTRL1, MDIO_PMA_CTRL1_LOOPBACK,
			  efx->loopback_mode == LOOPBACK_PMAPMD);
	efx_mdio_set_flag(efx, MDIO_MMD_PCS,
			  MDIO_CTRL1, MDIO_PCS_CTRL1_LOOPBACK,
			  efx->loopback_mode == LOOPBACK_PCS);
	efx_mdio_set_flag(efx, MDIO_MMD_PHYXS,
			  MDIO_CTRL1, MDIO_PHYXS_CTRL1_LOOPBACK,
			  efx->loopback_mode == LOOPBACK_PHYXS_WS);
}

static void efx_mdio_set_mmd_lpower(struct efx_nic *efx,
				    int lpower, int mmd)
{
	int stat = efx_mdio_read(efx, mmd, MDIO_STAT1);

	netif_vdbg(efx, drv, efx->net_dev, "Setting low power mode for MMD %d to %d\n",
		  mmd, lpower);

	if (stat & MDIO_STAT1_LPOWERABLE) {
		efx_mdio_set_flag(efx, mmd, MDIO_CTRL1,
				  MDIO_CTRL1_LPOWER, lpower);
	}
}

void efx_mdio_set_mmds_lpower(struct efx_nic *efx,
			      int low_power, unsigned int mmd_mask)
{
	int mmd = 0;
	mmd_mask &= ~MDIO_DEVS_AN;
	while (mmd_mask) {
		if (mmd_mask & 1)
			efx_mdio_set_mmd_lpower(efx, low_power, mmd);
		mmd_mask = (mmd_mask >> 1);
		mmd++;
	}
}

/**
 * efx_mdio_set_settings - Set (some of) the PHY settings over MDIO.
 * @efx:		Efx NIC
 * @ecmd: 		New settings
 */
int efx_mdio_set_settings(struct efx_nic *efx, struct ethtool_cmd *ecmd)
{
	struct ethtool_cmd prev;

	efx->phy_op->get_settings(efx, &prev);

	if (ecmd->advertising == prev.advertising &&
	    ecmd->speed == prev.speed &&
	    ecmd->duplex == prev.duplex &&
	    ecmd->port == prev.port &&
	    ecmd->autoneg == prev.autoneg)
		return 0;

	/* We can only change these settings for -T PHYs */
	if (prev.port != PORT_TP || ecmd->port != PORT_TP)
		return -EINVAL;

	/* Check that PHY supports these settings */
	if (!ecmd->autoneg ||
	    (ecmd->advertising | SUPPORTED_Autoneg) & ~prev.supported)
		return -EINVAL;

	efx_link_set_advertising(efx, ecmd->advertising | ADVERTISED_Autoneg);
	efx_mdio_an_reconfigure(efx);
	return 0;
}

/**
 * efx_mdio_an_reconfigure - Push advertising flags and restart autonegotiation
 * @efx:		Efx NIC
 */
void efx_mdio_an_reconfigure(struct efx_nic *efx)
{
	int reg;

	WARN_ON(!(efx->mdio.mmds & MDIO_DEVS_AN));

	/* Set up the base page */
	reg = ADVERTISE_CSMA | ADVERTISE_RESV;
	if (efx->link_advertising & ADVERTISED_Pause)
		reg |= ADVERTISE_PAUSE_CAP;
	if (efx->link_advertising & ADVERTISED_Asym_Pause)
		reg |= ADVERTISE_PAUSE_ASYM;
	efx_mdio_write(efx, MDIO_MMD_AN, MDIO_AN_ADVERTISE, reg);

	/* Set up the (extended) next page */
	efx->phy_op->set_npage_adv(efx, efx->link_advertising);

	/* Enable and restart AN */
	reg = efx_mdio_read(efx, MDIO_MMD_AN, MDIO_CTRL1);
	reg |= MDIO_AN_CTRL1_ENABLE | MDIO_AN_CTRL1_RESTART | MDIO_AN_CTRL1_XNP;
	efx_mdio_write(efx, MDIO_MMD_AN, MDIO_CTRL1, reg);
}

enum efx_fc_type efx_mdio_get_pause(struct efx_nic *efx)
{
	BUILD_BUG_ON(EFX_FC_AUTO & (EFX_FC_RX | EFX_FC_TX));

	if (!(efx->wanted_fc & EFX_FC_AUTO))
		return efx->wanted_fc;

	WARN_ON(!(efx->mdio.mmds & MDIO_DEVS_AN));

	return mii_resolve_flowctrl_fdx(
		mii_advertise_flowctrl(efx->wanted_fc),
		efx_mdio_read(efx, MDIO_MMD_AN, MDIO_AN_LPA));
}

int efx_mdio_test_alive(struct efx_nic *efx)
{
	int rc;
	int devad = __ffs(efx->mdio.mmds);
	u16 physid1, physid2;

	mutex_lock(&efx->mac_lock);

	physid1 = efx_mdio_read(efx, devad, MDIO_DEVID1);
	physid2 = efx_mdio_read(efx, devad, MDIO_DEVID2);

	if ((physid1 == 0x0000) || (physid1 == 0xffff) ||
	    (physid2 == 0x0000) || (physid2 == 0xffff)) {
		netif_err(efx, hw, efx->net_dev,
			  "no MDIO PHY present with ID %d\n", efx->mdio.prtad);
		rc = -EINVAL;
	} else {
		rc = efx_mdio_check_mmds(efx, efx->mdio.mmds, 0);
	}

	mutex_unlock(&efx->mac_lock);
	return rc;
}
Commit	Line	Data
8ceee660 BH	1	/****************************************************************************
8ceee660 BH	2	* Driver for Solarflare Solarstorm network controllers and boards
906bb26c	3	* Copyright 2006-2009 Solarflare Communications Inc.
8ceee660 BH	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	* Useful functions for working with MDIO clause 45 PHYs
	11	*/
	12	#include <linux/types.h>
	13	#include <linux/ethtool.h>
	14	#include <linux/delay.h>
	15	#include "net_driver.h"
	16	#include "mdio_10g.h"
8b9dc8dd	17	#include "workarounds.h"
8ceee660	18
68e7f45e	19	unsigned efx_mdio_id_oui(u32 id)
3f39a5e9 BH	20	{
	21	unsigned oui = 0;
	22	int i;
	23
	24	/* The bits of the OUI are designated a..x, with a=0 and b variable.
	25	* In the id register c is the MSB but the OUI is conventionally
	26	* written as bytes h..a, p..i, x..q. Reorder the bits accordingly. */
	27	for (i = 0; i < 22; ++i)
	28	if (id & (1 << (i + 10)))
	29	oui \|= 1 << (i ^ 7);
	30
	31	return oui;
	32	}
	33
68e7f45e	34	int efx_mdio_reset_mmd(struct efx_nic *port, int mmd,
8ceee660 BH	35	int spins, int spintime)
	36	{
	37	u32 ctrl;
8ceee660 BH	38
	39	/* Catch callers passing values in the wrong units (or just silly) */
	40	EFX_BUG_ON_PARANOID(spins * spintime >= 5000);
	41
68e7f45e	42	efx_mdio_write(port, mmd, MDIO_CTRL1, MDIO_CTRL1_RESET);
8ceee660 BH	43	/* Wait for the reset bit to clear. */
	44	do {
	45	msleep(spintime);
68e7f45e	46	ctrl = efx_mdio_read(port, mmd, MDIO_CTRL1);
8ceee660 BH	47	spins--;
8ceee660 BH	48
68e7f45e	49	} while (spins && (ctrl & MDIO_CTRL1_RESET));
8ceee660 BH	50
	51	return spins ? spins : -ETIMEDOUT;
	52	}
	53
68e7f45e	54	static int efx_mdio_check_mmd(struct efx_nic *efx, int mmd, int fault_fatal)
8ceee660 BH	55	{
8ceee660 BH	56	int status;
8ceee660	57
3273c2e8 BH	58	if (LOOPBACK_INTERNAL(efx))
	59	return 0;
	60
04cc8cac BH	61	if (mmd != MDIO_MMD_AN) {
04cc8cac BH	62	/* Read MMD STATUS2 to check it is responding. */
68e7f45e BH	63	status = efx_mdio_read(efx, mmd, MDIO_STAT2);
68e7f45e BH	64	if ((status & MDIO_STAT2_DEVPRST) != MDIO_STAT2_DEVPRST_VAL) {
62776d03 BH	65	netif_err(efx, hw, efx->net_dev,
62776d03 BH	66	"PHY MMD %d not responding.\n", mmd);
04cc8cac BH	67	return -EIO;
04cc8cac BH	68	}
8ceee660 BH	69	}
	70
	71	/* Read MMD STATUS 1 to check for fault. */
68e7f45e BH	72	status = efx_mdio_read(efx, mmd, MDIO_STAT1);
68e7f45e BH	73	if (status & MDIO_STAT1_FAULT) {
8ceee660	74	if (fault_fatal) {
62776d03 BH	75	netif_err(efx, hw, efx->net_dev,
	76	"PHY MMD %d reporting fatal"
	77	" fault: status %x\n", mmd, status);
8ceee660 BH	78	return -EIO;
8ceee660 BH	79	} else {
62776d03 BH	80	netif_dbg(efx, hw, efx->net_dev,
	81	"PHY MMD %d reporting status"
	82	" %x (expected)\n", mmd, status);
8ceee660 BH	83	}
	84	}
	85	return 0;
	86	}
	87
	88	/* This ought to be ridiculous overkill. We expect it to fail rarely */
	89	#define MDIO45_RESET_TIME 1000 /* ms */
	90	#define MDIO45_RESET_ITERS 100
	91
68e7f45e	92	int efx_mdio_wait_reset_mmds(struct efx_nic *efx, unsigned int mmd_mask)
8ceee660 BH	93	{
	94	const int spintime = MDIO45_RESET_TIME / MDIO45_RESET_ITERS;
	95	int tries = MDIO45_RESET_ITERS;
	96	int rc = 0;
	97	int in_reset;
	98
	99	while (tries) {
	100	int mask = mmd_mask;
	101	int mmd = 0;
	102	int stat;
	103	in_reset = 0;
	104	while (mask) {
	105	if (mask & 1) {
68e7f45e	106	stat = efx_mdio_read(efx, mmd, MDIO_CTRL1);
8ceee660	107	if (stat < 0) {
62776d03 BH	108	netif_err(efx, hw, efx->net_dev,
	109	"failed to read status of"
	110	" MMD %d\n", mmd);
8ceee660 BH	111	return -EIO;
8ceee660 BH	112	}
68e7f45e	113	if (stat & MDIO_CTRL1_RESET)
8ceee660 BH	114	in_reset \|= (1 << mmd);
	115	}
	116	mask = mask >> 1;
	117	mmd++;
	118	}
	119	if (!in_reset)
	120	break;
	121	tries--;
	122	msleep(spintime);
	123	}
	124	if (in_reset != 0) {
62776d03 BH	125	netif_err(efx, hw, efx->net_dev,
	126	"not all MMDs came out of reset in time."
	127	" MMDs still in reset: %x\n", in_reset);
8ceee660 BH	128	rc = -ETIMEDOUT;
	129	}
	130	return rc;
	131	}
	132
68e7f45e BH	133	int efx_mdio_check_mmds(struct efx_nic *efx,
68e7f45e BH	134	unsigned int mmd_mask, unsigned int fatal_mask)
8ceee660	135	{
68e7f45e	136	int mmd = 0, probe_mmd, devs1, devs2;
27dd2cac	137	u32 devices;
8ceee660 BH	138
	139	/* Historically we have probed the PHYXS to find out what devices are
	140	* present,but that doesn't work so well if the PHYXS isn't expected
	141	* to exist, if so just find the first item in the list supplied. */
68e7f45e	142	probe_mmd = (mmd_mask & MDIO_DEVS_PHYXS) ? MDIO_MMD_PHYXS :
8ceee660	143	__ffs(mmd_mask);
8ceee660 BH	144
8ceee660 BH	145	/* Check all the expected MMDs are present */
68e7f45e BH	146	devs1 = efx_mdio_read(efx, probe_mmd, MDIO_DEVS1);
	147	devs2 = efx_mdio_read(efx, probe_mmd, MDIO_DEVS2);
	148	if (devs1 < 0 \|\| devs2 < 0) {
62776d03 BH	149	netif_err(efx, hw, efx->net_dev,
62776d03 BH	150	"failed to read devices present\n");
8ceee660 BH	151	return -EIO;
8ceee660 BH	152	}
68e7f45e	153	devices = devs1 \| (devs2 << 16);
8ceee660	154	if ((devices & mmd_mask) != mmd_mask) {
62776d03 BH	155	netif_err(efx, hw, efx->net_dev,
	156	"required MMDs not present: got %x, wanted %x\n",
	157	devices, mmd_mask);
8ceee660 BH	158	return -ENODEV;
8ceee660 BH	159	}
62776d03	160	netif_vdbg(efx, hw, efx->net_dev, "Devices present: %x\n", devices);
8ceee660 BH	161
	162	/* Check all required MMDs are responding and happy. */
	163	while (mmd_mask) {
	164	if (mmd_mask & 1) {
	165	int fault_fatal = fatal_mask & 1;
68e7f45e	166	if (efx_mdio_check_mmd(efx, mmd, fault_fatal))
8ceee660 BH	167	return -EIO;
	168	}
	169	mmd_mask = mmd_mask >> 1;
	170	fatal_mask = fatal_mask >> 1;
	171	mmd++;
	172	}
	173
	174	return 0;
	175	}
	176
68e7f45e	177	bool efx_mdio_links_ok(struct efx_nic *efx, unsigned int mmd_mask)
8ceee660	178	{
3273c2e8 BH	179	/* If the port is in loopback, then we should only consider a subset
	180	* of mmd's */
	181	if (LOOPBACK_INTERNAL(efx))
dc8cfa55	182	return true;
e58f69f4	183	else if (LOOPBACK_MASK(efx) & LOOPBACKS_WS)
dc8cfa55	184	return false;
f8b87c17 BH	185	else if (efx_phy_mode_disabled(efx->phy_mode))
f8b87c17 BH	186	return false;
67797763	187	else if (efx->loopback_mode == LOOPBACK_PHYXS)
68e7f45e BH	188	mmd_mask &= ~(MDIO_DEVS_PHYXS \|
	189	MDIO_DEVS_PCS \|
	190	MDIO_DEVS_PMAPMD \|
	191	MDIO_DEVS_AN);
67797763	192	else if (efx->loopback_mode == LOOPBACK_PCS)
68e7f45e BH	193	mmd_mask &= ~(MDIO_DEVS_PCS \|
	194	MDIO_DEVS_PMAPMD \|
	195	MDIO_DEVS_AN);
3273c2e8	196	else if (efx->loopback_mode == LOOPBACK_PMAPMD)
68e7f45e BH	197	mmd_mask &= ~(MDIO_DEVS_PMAPMD \|
68e7f45e BH	198	MDIO_DEVS_AN);
67797763	199
68e7f45e	200	return mdio45_links_ok(&efx->mdio, mmd_mask);
8ceee660 BH	201	}
8ceee660 BH	202
68e7f45e	203	void efx_mdio_transmit_disable(struct efx_nic *efx)
3273c2e8	204	{
68e7f45e BH	205	efx_mdio_set_flag(efx, MDIO_MMD_PMAPMD,
	206	MDIO_PMA_TXDIS, MDIO_PMD_TXDIS_GLOBAL,
	207	efx->phy_mode & PHY_MODE_TX_DISABLED);
3273c2e8 BH	208	}
3273c2e8 BH	209
68e7f45e	210	void efx_mdio_phy_reconfigure(struct efx_nic *efx)
3273c2e8	211	{
68e7f45e BH	212	efx_mdio_set_flag(efx, MDIO_MMD_PMAPMD,
	213	MDIO_CTRL1, MDIO_PMA_CTRL1_LOOPBACK,
	214	efx->loopback_mode == LOOPBACK_PMAPMD);
	215	efx_mdio_set_flag(efx, MDIO_MMD_PCS,
	216	MDIO_CTRL1, MDIO_PCS_CTRL1_LOOPBACK,
	217	efx->loopback_mode == LOOPBACK_PCS);
	218	efx_mdio_set_flag(efx, MDIO_MMD_PHYXS,
	219	MDIO_CTRL1, MDIO_PHYXS_CTRL1_LOOPBACK,
e58f69f4	220	efx->loopback_mode == LOOPBACK_PHYXS_WS);
3273c2e8 BH	221	}
3273c2e8 BH	222
68e7f45e BH	223	static void efx_mdio_set_mmd_lpower(struct efx_nic *efx,
68e7f45e BH	224	int lpower, int mmd)
3e133c44	225	{
68e7f45e	226	int stat = efx_mdio_read(efx, mmd, MDIO_STAT1);
3e133c44	227
62776d03	228	netif_vdbg(efx, drv, efx->net_dev, "Setting low power mode for MMD %d to %d\n",
3e133c44 BH	229	mmd, lpower);
3e133c44 BH	230
68e7f45e BH	231	if (stat & MDIO_STAT1_LPOWERABLE) {
	232	efx_mdio_set_flag(efx, mmd, MDIO_CTRL1,
	233	MDIO_CTRL1_LPOWER, lpower);
3e133c44 BH	234	}
	235	}
	236
68e7f45e BH	237	void efx_mdio_set_mmds_lpower(struct efx_nic *efx,
68e7f45e BH	238	int low_power, unsigned int mmd_mask)
3e133c44 BH	239	{
3e133c44 BH	240	int mmd = 0;
68e7f45e	241	mmd_mask &= ~MDIO_DEVS_AN;
3e133c44 BH	242	while (mmd_mask) {
3e133c44 BH	243	if (mmd_mask & 1)
68e7f45e	244	efx_mdio_set_mmd_lpower(efx, low_power, mmd);
3e133c44 BH	245	mmd_mask = (mmd_mask >> 1);
	246	mmd++;
	247	}
	248	}
	249
04cc8cac	250	/**
68e7f45e	251	* efx_mdio_set_settings - Set (some of) the PHY settings over MDIO.
8ceee660 BH	252	* @efx: Efx NIC
8ceee660 BH	253	* @ecmd: New settings
8ceee660	254	*/
68e7f45e	255	int efx_mdio_set_settings(struct efx_nic efx, struct ethtool_cmd ecmd)
8ceee660	256	{
04cc8cac	257	struct ethtool_cmd prev;
04cc8cac BH	258
	259	efx->phy_op->get_settings(efx, &prev);
	260
	261	if (ecmd->advertising == prev.advertising &&
	262	ecmd->speed == prev.speed &&
	263	ecmd->duplex == prev.duplex &&
	264	ecmd->port == prev.port &&
	265	ecmd->autoneg == prev.autoneg)
8ceee660	266	return 0;
04cc8cac BH	267
	268	/* We can only change these settings for -T PHYs */
	269	if (prev.port != PORT_TP \|\| ecmd->port != PORT_TP)
	270	return -EINVAL;
	271
af4ad9bc	272	/* Check that PHY supports these settings */
fc2b5e67 BH	273	if (!ecmd->autoneg \|\|
fc2b5e67 BH	274	(ecmd->advertising \| SUPPORTED_Autoneg) & ~prev.supported)
04cc8cac BH	275	return -EINVAL;
04cc8cac BH	276
d3245b28 BH	277	efx_link_set_advertising(efx, ecmd->advertising \| ADVERTISED_Autoneg);
	278	efx_mdio_an_reconfigure(efx);
	279	return 0;
	280	}
	281
	282	/**
	283	* efx_mdio_an_reconfigure - Push advertising flags and restart autonegotiation
	284	* @efx: Efx NIC
	285	*/
	286	void efx_mdio_an_reconfigure(struct efx_nic *efx)
	287	{
d3245b28 BH	288	int reg;
	289
	290	WARN_ON(!(efx->mdio.mmds & MDIO_DEVS_AN));
fc2b5e67 BH	291
fc2b5e67 BH	292	/* Set up the base page */
8fbca791	293	reg = ADVERTISE_CSMA \| ADVERTISE_RESV;
d3245b28 BH	294	if (efx->link_advertising & ADVERTISED_Pause)
	295	reg \|= ADVERTISE_PAUSE_CAP;
	296	if (efx->link_advertising & ADVERTISED_Asym_Pause)
	297	reg \|= ADVERTISE_PAUSE_ASYM;
fc2b5e67 BH	298	efx_mdio_write(efx, MDIO_MMD_AN, MDIO_AN_ADVERTISE, reg);
fc2b5e67 BH	299
8fbca791 BH	300	/* Set up the (extended) next page */
8fbca791 BH	301	efx->phy_op->set_npage_adv(efx, efx->link_advertising);
fc2b5e67 BH	302
	303	/* Enable and restart AN */
	304	reg = efx_mdio_read(efx, MDIO_MMD_AN, MDIO_CTRL1);
8fbca791	305	reg \|= MDIO_AN_CTRL1_ENABLE \| MDIO_AN_CTRL1_RESTART \| MDIO_AN_CTRL1_XNP;
fc2b5e67	306	efx_mdio_write(efx, MDIO_MMD_AN, MDIO_CTRL1, reg);
04cc8cac BH	307	}
04cc8cac BH	308
68e7f45e	309	enum efx_fc_type efx_mdio_get_pause(struct efx_nic *efx)
04cc8cac	310	{
18ea024f	311	BUILD_BUG_ON(EFX_FC_AUTO & (EFX_FC_RX \| EFX_FC_TX));
04cc8cac	312
18ea024f	313	if (!(efx->wanted_fc & EFX_FC_AUTO))
04cc8cac	314	return efx->wanted_fc;
18ea024f BH	315
	316	WARN_ON(!(efx->mdio.mmds & MDIO_DEVS_AN));
	317
	318	return mii_resolve_flowctrl_fdx(
	319	mii_advertise_flowctrl(efx->wanted_fc),
	320	efx_mdio_read(efx, MDIO_MMD_AN, MDIO_AN_LPA));
8ceee660	321	}
4f16c073 BH	322
	323	int efx_mdio_test_alive(struct efx_nic *efx)
	324	{
	325	int rc;
	326	int devad = __ffs(efx->mdio.mmds);
	327	u16 physid1, physid2;
	328
	329	mutex_lock(&efx->mac_lock);
	330
	331	physid1 = efx_mdio_read(efx, devad, MDIO_DEVID1);
	332	physid2 = efx_mdio_read(efx, devad, MDIO_DEVID2);
	333
	334	if ((physid1 == 0x0000) \|\| (physid1 == 0xffff) \|\|
	335	(physid2 == 0x0000) \|\| (physid2 == 0xffff)) {
62776d03 BH	336	netif_err(efx, hw, efx->net_dev,
62776d03 BH	337	"no MDIO PHY present with ID %d\n", efx->mdio.prtad);
4f16c073 BH	338	rc = -EINVAL;
	339	} else {
	340	rc = efx_mdio_check_mmds(efx, efx->mdio.mmds, 0);
	341	}
	342
	343	mutex_unlock(&efx->mac_lock);
	344	return rc;
	345	}