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
,