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 2022/32)
11 * See www.amcc.com for details (search for qt2032)
14 #include <linux/timer.h>
15 #include <linux/delay.h>
22 #define XFP_REQUIRED_DEVS (MDIO_MMDREG_DEVS_PCS | \
23 MDIO_MMDREG_DEVS_PMAPMD | \
24 MDIO_MMDREG_DEVS_PHYXS)
26 #define XFP_LOOPBACKS ((1 << LOOPBACK_PCS) | \
27 (1 << LOOPBACK_PMAPMD) | \
28 (1 << LOOPBACK_NETWORK))
30 /****************************************************************************/
31 /* Quake-specific MDIO registers */
32 #define MDIO_QUAKE_LED0_REG (0xD006)
34 void xfp_set_led(struct efx_nic *p, int led, int mode)
36 int addr = MDIO_QUAKE_LED0_REG + led;
37 mdio_clause45_write(p, p->mii.phy_id, MDIO_MMD_PMAPMD, addr,
42 enum efx_phy_mode phy_mode;
45 #define XFP_MAX_RESET_TIME 500
46 #define XFP_RESET_WAIT 10
48 /* Reset the PHYXS MMD. This is documented (for the Quake PHY) as doing
49 * a complete soft reset.
51 static int xfp_reset_phy(struct efx_nic *efx)
55 rc = mdio_clause45_reset_mmd(efx, MDIO_MMD_PHYXS,
56 XFP_MAX_RESET_TIME / XFP_RESET_WAIT,
61 /* Wait 250ms for the PHY to complete bootup */
64 /* Check that all the MMDs we expect are present and responding. We
65 * expect faults on some if the link is down, but not on the PHY XS */
66 rc = mdio_clause45_check_mmds(efx, XFP_REQUIRED_DEVS,
67 MDIO_MMDREG_DEVS_PHYXS);
71 efx->board_info.init_leds(efx);
76 EFX_ERR(efx, "XFP: reset timed out!\n");
80 static int xfp_phy_init(struct efx_nic *efx)
82 struct xfp_phy_data *phy_data;
83 u32 devid = mdio_clause45_read_id(efx, MDIO_MMD_PHYXS);
86 phy_data = kzalloc(sizeof(struct xfp_phy_data), GFP_KERNEL);
89 efx->phy_data = phy_data;
91 EFX_INFO(efx, "XFP: PHY ID reg %x (OUI %x model %x revision"
92 " %x)\n", devid, MDIO_ID_OUI(devid), MDIO_ID_MODEL(devid),
95 phy_data->phy_mode = efx->phy_mode;
97 rc = xfp_reset_phy(efx);
99 EFX_INFO(efx, "XFP: PHY init %s.\n",
100 rc ? "failed" : "successful");
107 kfree(efx->phy_data);
108 efx->phy_data = NULL;
112 static void xfp_phy_clear_interrupt(struct efx_nic *efx)
114 xenpack_clear_lasi_irqs(efx);
117 static int xfp_link_ok(struct efx_nic *efx)
119 return mdio_clause45_links_ok(efx, XFP_REQUIRED_DEVS);
122 static void xfp_phy_poll(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_sim_phy_event(efx);
130 static void xfp_phy_reconfigure(struct efx_nic *efx)
132 struct xfp_phy_data *phy_data = efx->phy_data;
134 /* Reset the PHY when moving from tx off to tx on */
135 if (!(efx->phy_mode & PHY_MODE_TX_DISABLED) &&
136 (phy_data->phy_mode & PHY_MODE_TX_DISABLED))
139 mdio_clause45_transmit_disable(efx);
140 mdio_clause45_phy_reconfigure(efx);
142 phy_data->phy_mode = efx->phy_mode;
143 efx->link_up = xfp_link_ok(efx);
144 efx->link_speed = 10000;
146 efx->link_fc = efx->wanted_fc;
150 static void xfp_phy_fini(struct efx_nic *efx)
152 /* Clobber the LED if it was blinking */
153 efx->board_info.blink(efx, false);
155 /* Free the context block */
156 kfree(efx->phy_data);
157 efx->phy_data = NULL;
160 struct efx_phy_operations falcon_xfp_phy_ops = {
162 .init = xfp_phy_init,
163 .reconfigure = xfp_phy_reconfigure,
164 .poll = xfp_phy_poll,
165 .fini = xfp_phy_fini,
166 .clear_interrupt = xfp_phy_clear_interrupt,
167 .get_settings = mdio_clause45_get_settings,
168 .set_settings = mdio_clause45_set_settings,
169 .mmds = XFP_REQUIRED_DEVS,
170 .loopbacks = XFP_LOOPBACKS,