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/****************************************************************************
* 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.
*/
/*
* Driver for XFP optical PHYs (plus some support specific to the Quake 2022/32)
* See www.amcc.com for details (search for qt2032)
*/
#include <linux/timer.h>
#include <linux/delay.h>
#include "efx.h"
#include "mdio_10g.h"
#include "xenpack.h"
#include "phy.h"
#include "falcon.h"
#define XFP_REQUIRED_DEVS (MDIO_MMDREG_DEVS_PCS | \
MDIO_MMDREG_DEVS_PMAPMD | \
MDIO_MMDREG_DEVS_PHYXS)
#define XFP_LOOPBACKS ((1 << LOOPBACK_PCS) | \
(1 << LOOPBACK_PMAPMD) | \
(1 << LOOPBACK_NETWORK))
/****************************************************************************/
/* Quake-specific MDIO registers */
#define MDIO_QUAKE_LED0_REG (0xD006)
void xfp_set_led(struct efx_nic *p, int led, int mode)
{
int addr = MDIO_QUAKE_LED0_REG + led;
mdio_clause45_write(p, p->mii.phy_id, MDIO_MMD_PMAPMD, addr,
mode);
}
struct xfp_phy_data {
enum efx_phy_mode phy_mode;
};
#define XFP_MAX_RESET_TIME 500
#define XFP_RESET_WAIT 10
/* Reset the PHYXS MMD. This is documented (for the Quake PHY) as doing
* a complete soft reset.
*/
static int xfp_reset_phy(struct efx_nic *efx)
{
int rc;
rc = mdio_clause45_reset_mmd(efx, MDIO_MMD_PHYXS,
XFP_MAX_RESET_TIME / XFP_RESET_WAIT,
XFP_RESET_WAIT);
if (rc < 0)
goto fail;
/* Wait 250ms for the PHY to complete bootup */
msleep(250);
/* Check that all the MMDs we expect are present and responding. We
* expect faults on some if the link is down, but not on the PHY XS */
rc = mdio_clause45_check_mmds(efx, XFP_REQUIRED_DEVS,
MDIO_MMDREG_DEVS_PHYXS);
if (rc < 0)
goto fail;
efx->board_info.init_leds(efx);
return rc;
fail:
EFX_ERR(efx, "XFP: reset timed out!\n");
return rc;
}
static int xfp_phy_init(struct efx_nic *efx)
{
struct xfp_phy_data *phy_data;
u32 devid = mdio_clause45_read_id(efx, MDIO_MMD_PHYXS);
int rc;
phy_data = kzalloc(sizeof(struct xfp_phy_data), GFP_KERNEL);
if (!phy_data)
return -ENOMEM;
efx->phy_data = phy_data;
EFX_INFO(efx, "XFP: PHY ID reg %x (OUI %x model %x revision"
" %x)\n", devid, MDIO_ID_OUI(devid), MDIO_ID_MODEL(devid),
MDIO_ID_REV(devid));
phy_data->phy_mode = efx->phy_mode;
rc = xfp_reset_phy(efx);
EFX_INFO(efx, "XFP: PHY init %s.\n",
rc ? "failed" : "successful");
if (rc < 0)
goto fail;
return 0;
fail:
kfree(efx->phy_data);
efx->phy_data = NULL;
return rc;
}
static void xfp_phy_clear_interrupt(struct efx_nic *efx)
{
xenpack_clear_lasi_irqs(efx);
}
static int xfp_link_ok(struct efx_nic *efx)
{
return mdio_clause45_links_ok(efx, XFP_REQUIRED_DEVS);
}
static void xfp_phy_poll(struct efx_nic *efx)
{
int link_up = xfp_link_ok(efx);
/* Simulate a PHY event if link state has changed */
if (link_up != efx->link_up)
falcon_sim_phy_event(efx);
}
static void xfp_phy_reconfigure(struct efx_nic *efx)
{
struct xfp_phy_data *phy_data = efx->phy_data;
/* Reset the PHY when moving from tx off to tx on */
if (!(efx->phy_mode & PHY_MODE_TX_DISABLED) &&
(phy_data->phy_mode & PHY_MODE_TX_DISABLED))
xfp_reset_phy(efx);
mdio_clause45_transmit_disable(efx);
mdio_clause45_phy_reconfigure(efx);
phy_data->phy_mode = efx->phy_mode;
efx->link_up = xfp_link_ok(efx);
efx->link_speed = 10000;
efx->link_fd = true;
efx->link_fc = efx->wanted_fc;
}
static void xfp_phy_fini(struct efx_nic *efx)
{
/* Clobber the LED if it was blinking */
efx->board_info.blink(efx, false);
/* Free the context block */
kfree(efx->phy_data);
efx->phy_data = NULL;
}
struct efx_phy_operations falcon_xfp_phy_ops = {
.macs = EFX_XMAC,
.init = xfp_phy_init,
.reconfigure = xfp_phy_reconfigure,
.poll = xfp_phy_poll,
.fini = xfp_phy_fini,
.clear_interrupt = xfp_phy_clear_interrupt,
.get_settings = mdio_clause45_get_settings,
.set_settings = mdio_clause45_set_settings,
.mmds = XFP_REQUIRED_DEVS,
.loopbacks = XFP_LOOPBACKS,
};
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