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,
43 enum efx_phy_mode phy_mode;
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);
90 efx->phy_data = phy_data;
92 EFX_INFO(efx, "XFP: PHY ID reg %x (OUI %x model %x revision"
93 " %x)\n", devid, MDIO_ID_OUI(devid), MDIO_ID_MODEL(devid),
96 phy_data->phy_mode = efx->phy_mode;
98 rc = xfp_reset_phy(efx);
100 EFX_INFO(efx, "XFP: PHY init %s.\n",
101 rc ? "failed" : "successful");
108 kfree(efx->phy_data);
109 efx->phy_data = NULL;
113 static void xfp_phy_clear_interrupt(struct efx_nic *efx)
115 xenpack_clear_lasi_irqs(efx);
118 static int xfp_link_ok(struct efx_nic *efx)
120 return mdio_clause45_links_ok(efx, XFP_REQUIRED_DEVS);
123 static int xfp_phy_check_hw(struct efx_nic *efx)
126 int link_up = xfp_link_ok(efx);
127 /* Simulate a PHY event if link state has changed */
128 if (link_up != efx->link_up)
129 falcon_xmac_sim_phy_event(efx);
131 rc = efx->board_info.monitor(efx);
133 struct xfp_phy_data *phy_data = efx->phy_data;
134 EFX_ERR(efx, "XFP sensor alert; putting PHY into low power\n");
135 efx->phy_mode |= PHY_MODE_LOW_POWER;
136 mdio_clause45_set_mmds_lpower(efx, 1, XFP_REQUIRED_DEVS);
137 phy_data->phy_mode |= PHY_MODE_LOW_POWER;
143 static void xfp_phy_reconfigure(struct efx_nic *efx)
145 struct xfp_phy_data *phy_data = efx->phy_data;
147 /* Reset the PHY when moving from tx off to tx on */
148 if (!(efx->phy_mode & PHY_MODE_TX_DISABLED) &&
149 (phy_data->phy_mode & PHY_MODE_TX_DISABLED))
152 mdio_clause45_transmit_disable(efx);
153 mdio_clause45_phy_reconfigure(efx);
155 phy_data->phy_mode = efx->phy_mode;
156 efx->link_up = xfp_link_ok(efx);
157 efx->link_options = GM_LPA_10000FULL;
161 static void xfp_phy_fini(struct efx_nic *efx)
163 /* Clobber the LED if it was blinking */
164 efx->board_info.blink(efx, false);
166 /* Free the context block */
167 kfree(efx->phy_data);
168 efx->phy_data = NULL;
171 struct efx_phy_operations falcon_xfp_phy_ops = {
172 .init = xfp_phy_init,
173 .reconfigure = xfp_phy_reconfigure,
174 .check_hw = xfp_phy_check_hw,
175 .fini = xfp_phy_fini,
176 .clear_interrupt = xfp_phy_clear_interrupt,
177 .mmds = XFP_REQUIRED_DEVS,
178 .loopbacks = XFP_LOOPBACKS,