1 /****************************************************************************
2 * Driver for Solarflare Solarstorm network controllers and boards
3 * Copyright 2006-2008 Solarflare Communications Inc.
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published
7 * by the Free Software Foundation, incorporated herein by reference.
10 * Driver for XFP optical PHYs (plus some support specific to the Quake 2032)
11 * See www.amcc.com for details (search for qt2032)
14 #include <linux/timer.h>
15 #include <linux/delay.h>
23 #define XFP_REQUIRED_DEVS (MDIO_MMDREG_DEVS0_PCS | \
24 MDIO_MMDREG_DEVS0_PMAPMD | \
25 MDIO_MMDREG_DEVS0_PHYXS)
27 #define XFP_LOOPBACKS ((1 << LOOPBACK_PCS) | \
28 (1 << LOOPBACK_PMAPMD) | \
29 (1 << LOOPBACK_NETWORK))
31 /****************************************************************************/
32 /* Quake-specific MDIO registers */
33 #define MDIO_QUAKE_LED0_REG (0xD006)
35 void xfp_set_led(struct efx_nic *p, int led, int mode)
37 int addr = MDIO_QUAKE_LED0_REG + led;
38 mdio_clause45_write(p, p->mii.phy_id, MDIO_MMD_PMAPMD, addr,
46 #define XFP_MAX_RESET_TIME 500
47 #define XFP_RESET_WAIT 10
49 /* Reset the PHYXS MMD. This is documented (for the Quake PHY) as doing
50 * a complete soft reset.
52 static int xfp_reset_phy(struct efx_nic *efx)
56 rc = mdio_clause45_reset_mmd(efx, MDIO_MMD_PHYXS,
57 XFP_MAX_RESET_TIME / XFP_RESET_WAIT,
62 /* Wait 250ms for the PHY to complete bootup */
65 /* Check that all the MMDs we expect are present and responding. We
66 * expect faults on some if the link is down, but not on the PHY XS */
67 rc = mdio_clause45_check_mmds(efx, XFP_REQUIRED_DEVS,
68 MDIO_MMDREG_DEVS0_PHYXS);
72 efx->board_info.init_leds(efx);
77 EFX_ERR(efx, "XFP: reset timed out!\n");
81 static int xfp_phy_init(struct efx_nic *efx)
83 struct xfp_phy_data *phy_data;
84 u32 devid = mdio_clause45_read_id(efx, MDIO_MMD_PHYXS);
87 phy_data = kzalloc(sizeof(struct xfp_phy_data), GFP_KERNEL);
88 efx->phy_data = (void *) phy_data;
90 EFX_INFO(efx, "XFP: PHY ID reg %x (OUI %x model %x revision"
91 " %x)\n", devid, MDIO_ID_OUI(devid), MDIO_ID_MODEL(devid),
94 phy_data->tx_disabled = efx->tx_disabled;
96 rc = xfp_reset_phy(efx);
98 EFX_INFO(efx, "XFP: PHY init %s.\n",
99 rc ? "failed" : "successful");
106 kfree(efx->phy_data);
107 efx->phy_data = NULL;
111 static void xfp_phy_clear_interrupt(struct efx_nic *efx)
113 xenpack_clear_lasi_irqs(efx);
116 static int xfp_link_ok(struct efx_nic *efx)
118 return mdio_clause45_links_ok(efx, XFP_REQUIRED_DEVS);
121 static int xfp_phy_check_hw(struct efx_nic *efx)
124 int link_up = xfp_link_ok(efx);
125 /* Simulate a PHY event if link state has changed */
126 if (link_up != efx->link_up)
127 falcon_xmac_sim_phy_event(efx);
132 static void xfp_phy_reconfigure(struct efx_nic *efx)
134 struct xfp_phy_data *phy_data = efx->phy_data;
136 /* Reset the PHY when moving from tx off to tx on */
137 if (phy_data->tx_disabled && !efx->tx_disabled)
140 mdio_clause45_transmit_disable(efx);
141 mdio_clause45_phy_reconfigure(efx);
143 phy_data->tx_disabled = efx->tx_disabled;
144 efx->link_up = xfp_link_ok(efx);
145 efx->link_options = GM_LPA_10000FULL;
149 static void xfp_phy_fini(struct efx_nic *efx)
151 /* Clobber the LED if it was blinking */
152 efx->board_info.blink(efx, 0);
154 /* Free the context block */
155 kfree(efx->phy_data);
156 efx->phy_data = NULL;
159 struct efx_phy_operations falcon_xfp_phy_ops = {
160 .init = xfp_phy_init,
161 .reconfigure = xfp_phy_reconfigure,
162 .check_hw = xfp_phy_check_hw,
163 .fini = xfp_phy_fini,
164 .clear_interrupt = xfp_phy_clear_interrupt,
165 .reset_xaui = efx_port_dummy_op_void,
166 .mmds = XFP_REQUIRED_DEVS,
167 .loopbacks = XFP_LOOPBACKS,