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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 SFP+ and XFP optical PHYs plus some support specific to the
* AMCC QT20xx adapters; see www.amcc.com for details
*/
#include <linux/timer.h>
#include <linux/delay.h>
#include "efx.h"
#include "mdio_10g.h"
#include "phy.h"
#include "falcon.h"
#define XFP_REQUIRED_DEVS (MDIO_DEVS_PCS | \
MDIO_DEVS_PMAPMD | \
MDIO_DEVS_PHYXS)
#define XFP_LOOPBACKS ((1 << LOOPBACK_PCS) | \
(1 << LOOPBACK_PMAPMD) | \
(1 << LOOPBACK_NETWORK))
/****************************************************************************/
/* Quake-specific MDIO registers */
#define MDIO_QUAKE_LED0_REG (0xD006)
/* QT2025C only */
#define PCS_FW_HEARTBEAT_REG 0xd7ee
#define PCS_FW_HEARTB_LBN 0
#define PCS_FW_HEARTB_WIDTH 8
#define PCS_UC8051_STATUS_REG 0xd7fd
#define PCS_UC_STATUS_LBN 0
#define PCS_UC_STATUS_WIDTH 8
#define PCS_UC_STATUS_FW_SAVE 0x20
#define PMA_PMD_FTX_CTRL2_REG 0xc309
#define PMA_PMD_FTX_STATIC_LBN 13
#define PMA_PMD_VEND1_REG 0xc001
#define PMA_PMD_VEND1_LBTXD_LBN 15
#define PCS_VEND1_REG 0xc000
#define PCS_VEND1_LBTXD_LBN 5
void xfp_set_led(struct efx_nic *p, int led, int mode)
{
int addr = MDIO_QUAKE_LED0_REG + led;
efx_mdio_write(p, 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
static int qt2025c_wait_reset(struct efx_nic *efx)
{
unsigned long timeout = jiffies + 10 * HZ;
int reg, old_counter = 0;
/* Wait for firmware heartbeat to start */
for (;;) {
int counter;
reg = efx_mdio_read(efx, MDIO_MMD_PCS, PCS_FW_HEARTBEAT_REG);
if (reg < 0)
return reg;
counter = ((reg >> PCS_FW_HEARTB_LBN) &
((1 << PCS_FW_HEARTB_WIDTH) - 1));
if (old_counter == 0)
old_counter = counter;
else if (counter != old_counter)
break;
if (time_after(jiffies, timeout))
return -ETIMEDOUT;
msleep(10);
}
/* Wait for firmware status to look good */
for (;;) {
reg = efx_mdio_read(efx, MDIO_MMD_PCS, PCS_UC8051_STATUS_REG);
if (reg < 0)
return reg;
if ((reg &
((1 << PCS_UC_STATUS_WIDTH) - 1) << PCS_UC_STATUS_LBN) >=
PCS_UC_STATUS_FW_SAVE)
break;
if (time_after(jiffies, timeout))
return -ETIMEDOUT;
msleep(100);
}
return 0;
}
static int xfp_reset_phy(struct efx_nic *efx)
{
int rc;
if (efx->phy_type == PHY_TYPE_QT2025C) {
/* Wait for the reset triggered by falcon_reset_hw()
* to complete */
rc = qt2025c_wait_reset(efx);
if (rc < 0)
goto fail;
} else {
/* Reset the PHYXS MMD. This is documented as doing
* a complete soft reset. */
rc = efx_mdio_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 = efx_mdio_check_mmds(efx, XFP_REQUIRED_DEVS, MDIO_DEVS_PHYXS);
if (rc < 0)
goto fail;
efx->board_info.init_leds(efx);
return rc;
fail:
EFX_ERR(efx, "PHY reset timed out\n");
return rc;
}
static int xfp_phy_init(struct efx_nic *efx)
{
struct xfp_phy_data *phy_data;
u32 devid = efx_mdio_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, "PHY ID reg %x (OUI %06x model %02x revision %x)\n",
devid, efx_mdio_id_oui(devid), efx_mdio_id_model(devid),
efx_mdio_id_rev(devid));
phy_data->phy_mode = efx->phy_mode;
rc = xfp_reset_phy(efx);
EFX_INFO(efx, "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)
{
/* Read to clear link status alarm */
efx_mdio_read(efx, MDIO_MMD_PMAPMD, MDIO_PMA_LASI_STAT);
}
static int xfp_link_ok(struct efx_nic *efx)
{
return efx_mdio_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;
if (efx->phy_type == PHY_TYPE_QT2025C) {
/* There are several different register bits which can
* disable TX (and save power) on direct-attach cables
* or optical transceivers, varying somewhat between
* firmware versions. Only 'static mode' appears to
* cover everything. */
mdio_set_flag(
&efx->mdio, efx->mdio.prtad, MDIO_MMD_PMAPMD,
PMA_PMD_FTX_CTRL2_REG, 1 << PMA_PMD_FTX_STATIC_LBN,
efx->phy_mode & PHY_MODE_TX_DISABLED ||
efx->phy_mode & PHY_MODE_LOW_POWER ||
efx->loopback_mode == LOOPBACK_PCS ||
efx->loopback_mode == LOOPBACK_PMAPMD);
} else {
/* 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);
efx_mdio_transmit_disable(efx);
}
efx_mdio_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_get_settings(struct efx_nic *efx, struct ethtool_cmd *ecmd)
{
mdio45_ethtool_gset(&efx->mdio, ecmd);
}
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 = xfp_phy_get_settings,
.set_settings = efx_mdio_set_settings,
.mmds = XFP_REQUIRED_DEVS,
.loopbacks = XFP_LOOPBACKS,
};
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