251 lines
6.4 KiB
C
251 lines
6.4 KiB
C
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/****************************************************************************
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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 SFP+ and XFP optical PHYs plus some support specific to the
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* AMCC QT20xx adapters; see www.amcc.com for details
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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 "mdio_10g.h"
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#include "phy.h"
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#include "falcon.h"
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#define XFP_REQUIRED_DEVS (MDIO_DEVS_PCS | \
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MDIO_DEVS_PMAPMD | \
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MDIO_DEVS_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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/* QT2025C only */
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#define PCS_FW_HEARTBEAT_REG 0xd7ee
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#define PCS_FW_HEARTB_LBN 0
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#define PCS_FW_HEARTB_WIDTH 8
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#define PCS_UC8051_STATUS_REG 0xd7fd
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#define PCS_UC_STATUS_LBN 0
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#define PCS_UC_STATUS_WIDTH 8
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#define PCS_UC_STATUS_FW_SAVE 0x20
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#define PMA_PMD_FTX_CTRL2_REG 0xc309
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#define PMA_PMD_FTX_STATIC_LBN 13
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#define PMA_PMD_VEND1_REG 0xc001
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#define PMA_PMD_VEND1_LBTXD_LBN 15
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#define PCS_VEND1_REG 0xc000
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#define PCS_VEND1_LBTXD_LBN 5
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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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efx_mdio_write(p, MDIO_MMD_PMAPMD, addr, mode);
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}
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struct xfp_phy_data {
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enum efx_phy_mode phy_mode;
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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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static int qt2025c_wait_reset(struct efx_nic *efx)
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{
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unsigned long timeout = jiffies + 10 * HZ;
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int reg, old_counter = 0;
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/* Wait for firmware heartbeat to start */
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for (;;) {
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int counter;
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reg = efx_mdio_read(efx, MDIO_MMD_PCS, PCS_FW_HEARTBEAT_REG);
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if (reg < 0)
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return reg;
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counter = ((reg >> PCS_FW_HEARTB_LBN) &
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((1 << PCS_FW_HEARTB_WIDTH) - 1));
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if (old_counter == 0)
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old_counter = counter;
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else if (counter != old_counter)
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break;
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if (time_after(jiffies, timeout))
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return -ETIMEDOUT;
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msleep(10);
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}
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/* Wait for firmware status to look good */
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for (;;) {
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reg = efx_mdio_read(efx, MDIO_MMD_PCS, PCS_UC8051_STATUS_REG);
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if (reg < 0)
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return reg;
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if ((reg &
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((1 << PCS_UC_STATUS_WIDTH) - 1) << PCS_UC_STATUS_LBN) >=
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PCS_UC_STATUS_FW_SAVE)
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break;
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if (time_after(jiffies, timeout))
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return -ETIMEDOUT;
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msleep(100);
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}
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return 0;
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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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if (efx->phy_type == PHY_TYPE_QT2025C) {
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/* Wait for the reset triggered by falcon_reset_hw()
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* to complete */
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rc = qt2025c_wait_reset(efx);
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if (rc < 0)
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goto fail;
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} else {
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/* Reset the PHYXS MMD. This is documented as doing
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* a complete soft reset. */
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rc = efx_mdio_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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}
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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 = efx_mdio_check_mmds(efx, XFP_REQUIRED_DEVS, MDIO_DEVS_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, "PHY 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 = efx_mdio_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, "PHY ID reg %x (OUI %06x model %02x revision %x)\n",
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devid, efx_mdio_id_oui(devid), efx_mdio_id_model(devid),
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efx_mdio_id_rev(devid));
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phy_data->phy_mode = efx->phy_mode;
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rc = xfp_reset_phy(efx);
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EFX_INFO(efx, "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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/* Read to clear link status alarm */
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efx_mdio_read(efx, MDIO_MMD_PMAPMD, MDIO_PMA_LASI_STAT);
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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 efx_mdio_links_ok(efx, XFP_REQUIRED_DEVS);
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}
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static void xfp_phy_poll(struct efx_nic *efx)
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{
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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_sim_phy_event(efx);
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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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if (efx->phy_type == PHY_TYPE_QT2025C) {
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/* There are several different register bits which can
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* disable TX (and save power) on direct-attach cables
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* or optical transceivers, varying somewhat between
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* firmware versions. Only 'static mode' appears to
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* cover everything. */
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mdio_set_flag(
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&efx->mdio, efx->mdio.prtad, MDIO_MMD_PMAPMD,
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PMA_PMD_FTX_CTRL2_REG, 1 << PMA_PMD_FTX_STATIC_LBN,
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efx->phy_mode & PHY_MODE_TX_DISABLED ||
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efx->phy_mode & PHY_MODE_LOW_POWER ||
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efx->loopback_mode == LOOPBACK_PCS ||
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efx->loopback_mode == LOOPBACK_PMAPMD);
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} else {
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/* Reset the PHY when moving from tx off to tx on */
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if (!(efx->phy_mode & PHY_MODE_TX_DISABLED) &&
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(phy_data->phy_mode & PHY_MODE_TX_DISABLED))
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xfp_reset_phy(efx);
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efx_mdio_transmit_disable(efx);
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}
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efx_mdio_phy_reconfigure(efx);
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phy_data->phy_mode = efx->phy_mode;
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efx->link_up = xfp_link_ok(efx);
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efx->link_speed = 10000;
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efx->link_fd = true;
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efx->link_fc = efx->wanted_fc;
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}
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static void xfp_phy_get_settings(struct efx_nic *efx, struct ethtool_cmd *ecmd)
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{
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mdio45_ethtool_gset(&efx->mdio, ecmd);
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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, false);
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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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.macs = EFX_XMAC,
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.init = xfp_phy_init,
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.reconfigure = xfp_phy_reconfigure,
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.poll = xfp_phy_poll,
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.fini = xfp_phy_fini,
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.clear_interrupt = xfp_phy_clear_interrupt,
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.get_settings = xfp_phy_get_settings,
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.set_settings = efx_mdio_set_settings,
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.mmds = XFP_REQUIRED_DEVS,
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.loopbacks = XFP_LOOPBACKS,
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};
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