/**************************************************************************** * 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 2032) * See www.amcc.com for details (search for qt2032) */ #include <linux/timer.h> #include <linux/delay.h> #include "efx.h" #include "gmii.h" #include "mdio_10g.h" #include "xenpack.h" #include "phy.h" #include "mac.h" #define XFP_REQUIRED_DEVS (MDIO_MMDREG_DEVS0_PCS | \ MDIO_MMDREG_DEVS0_PMAPMD | \ MDIO_MMDREG_DEVS0_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_DEVS0_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 int xfp_phy_check_hw(struct efx_nic *efx) { int rc = 0; int link_up = xfp_link_ok(efx); /* Simulate a PHY event if link state has changed */ if (link_up != efx->link_up) falcon_xmac_sim_phy_event(efx); return rc; } 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_options = GM_LPA_10000FULL; } 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 = { .init = xfp_phy_init, .reconfigure = xfp_phy_reconfigure, .check_hw = xfp_phy_check_hw, .fini = xfp_phy_fini, .clear_interrupt = xfp_phy_clear_interrupt, .mmds = XFP_REQUIRED_DEVS, .loopbacks = XFP_LOOPBACKS, };