171 строка
4.1 KiB
C
171 строка
4.1 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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/*
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* Driver for XFP optical PHYs (plus some support specific to the Quake 2032)
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* See www.amcc.com for details (search for qt2032)
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*/
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#include <linux/timer.h>
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#include <linux/delay.h>
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#include "efx.h"
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#include "gmii.h"
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#include "mdio_10g.h"
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#include "xenpack.h"
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#include "phy.h"
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#include "mac.h"
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#define XFP_REQUIRED_DEVS (MDIO_MMDREG_DEVS0_PCS | \
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MDIO_MMDREG_DEVS0_PMAPMD | \
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MDIO_MMDREG_DEVS0_PHYXS)
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#define XFP_LOOPBACKS ((1 << LOOPBACK_PCS) | \
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(1 << LOOPBACK_PMAPMD) | \
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(1 << LOOPBACK_NETWORK))
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/****************************************************************************/
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/* Quake-specific MDIO registers */
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#define MDIO_QUAKE_LED0_REG (0xD006)
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void xfp_set_led(struct efx_nic *p, int led, int mode)
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{
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int addr = MDIO_QUAKE_LED0_REG + led;
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mdio_clause45_write(p, p->mii.phy_id, MDIO_MMD_PMAPMD, addr,
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mode);
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}
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struct xfp_phy_data {
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int tx_disabled;
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};
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#define XFP_MAX_RESET_TIME 500
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#define XFP_RESET_WAIT 10
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/* Reset the PHYXS MMD. This is documented (for the Quake PHY) as doing
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* a complete soft reset.
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*/
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static int xfp_reset_phy(struct efx_nic *efx)
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{
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int rc;
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rc = mdio_clause45_reset_mmd(efx, MDIO_MMD_PHYXS,
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XFP_MAX_RESET_TIME / XFP_RESET_WAIT,
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XFP_RESET_WAIT);
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if (rc < 0)
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goto fail;
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/* Wait 250ms for the PHY to complete bootup */
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msleep(250);
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/* Check that all the MMDs we expect are present and responding. We
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* expect faults on some if the link is down, but not on the PHY XS */
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rc = mdio_clause45_check_mmds(efx, XFP_REQUIRED_DEVS,
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MDIO_MMDREG_DEVS0_PHYXS);
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if (rc < 0)
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goto fail;
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efx->board_info.init_leds(efx);
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return rc;
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fail:
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EFX_ERR(efx, "XFP: reset timed out!\n");
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return rc;
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}
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static int xfp_phy_init(struct efx_nic *efx)
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{
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struct xfp_phy_data *phy_data;
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u32 devid = mdio_clause45_read_id(efx, MDIO_MMD_PHYXS);
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int rc;
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phy_data = kzalloc(sizeof(struct xfp_phy_data), GFP_KERNEL);
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if (!phy_data)
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return -ENOMEM;
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efx->phy_data = phy_data;
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EFX_INFO(efx, "XFP: PHY ID reg %x (OUI %x model %x revision"
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" %x)\n", devid, MDIO_ID_OUI(devid), MDIO_ID_MODEL(devid),
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MDIO_ID_REV(devid));
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phy_data->tx_disabled = efx->tx_disabled;
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rc = xfp_reset_phy(efx);
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EFX_INFO(efx, "XFP: PHY init %s.\n",
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rc ? "failed" : "successful");
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if (rc < 0)
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goto fail;
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return 0;
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fail:
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kfree(efx->phy_data);
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efx->phy_data = NULL;
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return rc;
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}
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static void xfp_phy_clear_interrupt(struct efx_nic *efx)
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{
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xenpack_clear_lasi_irqs(efx);
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}
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static int xfp_link_ok(struct efx_nic *efx)
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{
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return mdio_clause45_links_ok(efx, XFP_REQUIRED_DEVS);
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}
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static int xfp_phy_check_hw(struct efx_nic *efx)
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{
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int rc = 0;
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int link_up = xfp_link_ok(efx);
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/* Simulate a PHY event if link state has changed */
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if (link_up != efx->link_up)
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falcon_xmac_sim_phy_event(efx);
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return rc;
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}
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static void xfp_phy_reconfigure(struct efx_nic *efx)
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{
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struct xfp_phy_data *phy_data = efx->phy_data;
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/* Reset the PHY when moving from tx off to tx on */
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if (phy_data->tx_disabled && !efx->tx_disabled)
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xfp_reset_phy(efx);
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mdio_clause45_transmit_disable(efx);
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mdio_clause45_phy_reconfigure(efx);
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phy_data->tx_disabled = efx->tx_disabled;
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efx->link_up = xfp_link_ok(efx);
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efx->link_options = GM_LPA_10000FULL;
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}
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static void xfp_phy_fini(struct efx_nic *efx)
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{
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/* Clobber the LED if it was blinking */
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efx->board_info.blink(efx, 0);
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/* Free the context block */
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kfree(efx->phy_data);
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efx->phy_data = NULL;
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}
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struct efx_phy_operations falcon_xfp_phy_ops = {
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.init = xfp_phy_init,
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.reconfigure = xfp_phy_reconfigure,
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.check_hw = xfp_phy_check_hw,
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.fini = xfp_phy_fini,
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.clear_interrupt = xfp_phy_clear_interrupt,
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.reset_xaui = efx_port_dummy_op_void,
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.mmds = XFP_REQUIRED_DEVS,
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.loopbacks = XFP_LOOPBACKS,
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};
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