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 AMCC QT202x SFP+ and XFP adapters; see www.amcc.com for details
13 #include <linux/timer.h>
14 #include <linux/delay.h>
20 #define QT202X_REQUIRED_DEVS (MDIO_DEVS_PCS | \
24 #define QT202X_LOOPBACKS ((1 << LOOPBACK_PCS) | \
25 (1 << LOOPBACK_PMAPMD) | \
26 (1 << LOOPBACK_NETWORK))
28 /****************************************************************************/
29 /* Quake-specific MDIO registers */
30 #define MDIO_QUAKE_LED0_REG (0xD006)
33 #define PCS_FW_HEARTBEAT_REG 0xd7ee
34 #define PCS_FW_HEARTB_LBN 0
35 #define PCS_FW_HEARTB_WIDTH 8
36 #define PCS_UC8051_STATUS_REG 0xd7fd
37 #define PCS_UC_STATUS_LBN 0
38 #define PCS_UC_STATUS_WIDTH 8
39 #define PCS_UC_STATUS_FW_SAVE 0x20
40 #define PMA_PMD_FTX_CTRL2_REG 0xc309
41 #define PMA_PMD_FTX_STATIC_LBN 13
42 #define PMA_PMD_VEND1_REG 0xc001
43 #define PMA_PMD_VEND1_LBTXD_LBN 15
44 #define PCS_VEND1_REG 0xc000
45 #define PCS_VEND1_LBTXD_LBN 5
47 void falcon_qt202x_set_led(struct efx_nic
*p
, int led
, int mode
)
49 int addr
= MDIO_QUAKE_LED0_REG
+ led
;
50 efx_mdio_write(p
, MDIO_MMD_PMAPMD
, addr
, mode
);
53 struct qt202x_phy_data
{
54 enum efx_phy_mode phy_mode
;
57 #define QT2022C2_MAX_RESET_TIME 500
58 #define QT2022C2_RESET_WAIT 10
60 static int qt2025c_wait_reset(struct efx_nic
*efx
)
62 unsigned long timeout
= jiffies
+ 10 * HZ
;
63 int reg
, old_counter
= 0;
65 /* Wait for firmware heartbeat to start */
68 reg
= efx_mdio_read(efx
, MDIO_MMD_PCS
, PCS_FW_HEARTBEAT_REG
);
71 counter
= ((reg
>> PCS_FW_HEARTB_LBN
) &
72 ((1 << PCS_FW_HEARTB_WIDTH
) - 1));
74 old_counter
= counter
;
75 else if (counter
!= old_counter
)
77 if (time_after(jiffies
, timeout
))
82 /* Wait for firmware status to look good */
84 reg
= efx_mdio_read(efx
, MDIO_MMD_PCS
, PCS_UC8051_STATUS_REG
);
88 ((1 << PCS_UC_STATUS_WIDTH
) - 1) << PCS_UC_STATUS_LBN
) >=
89 PCS_UC_STATUS_FW_SAVE
)
91 if (time_after(jiffies
, timeout
))
99 static int qt202x_reset_phy(struct efx_nic
*efx
)
103 if (efx
->phy_type
== PHY_TYPE_QT2025C
) {
104 /* Wait for the reset triggered by falcon_reset_hw()
106 rc
= qt2025c_wait_reset(efx
);
110 /* Reset the PHYXS MMD. This is documented as doing
111 * a complete soft reset. */
112 rc
= efx_mdio_reset_mmd(efx
, MDIO_MMD_PHYXS
,
113 QT2022C2_MAX_RESET_TIME
/
115 QT2022C2_RESET_WAIT
);
120 /* Wait 250ms for the PHY to complete bootup */
123 /* Check that all the MMDs we expect are present and responding. We
124 * expect faults on some if the link is down, but not on the PHY XS */
125 rc
= efx_mdio_check_mmds(efx
, QT202X_REQUIRED_DEVS
, MDIO_DEVS_PHYXS
);
129 falcon_board(efx
)->type
->init_phy(efx
);
134 EFX_ERR(efx
, "PHY reset timed out\n");
138 static int qt202x_phy_init(struct efx_nic
*efx
)
140 struct qt202x_phy_data
*phy_data
;
144 rc
= qt202x_reset_phy(efx
);
146 EFX_ERR(efx
, "PHY init failed\n");
150 phy_data
= kzalloc(sizeof(struct qt202x_phy_data
), GFP_KERNEL
);
153 efx
->phy_data
= phy_data
;
155 devid
= efx_mdio_read_id(efx
, MDIO_MMD_PHYXS
);
156 EFX_INFO(efx
, "PHY ID reg %x (OUI %06x model %02x revision %x)\n",
157 devid
, efx_mdio_id_oui(devid
), efx_mdio_id_model(devid
),
158 efx_mdio_id_rev(devid
));
160 phy_data
->phy_mode
= efx
->phy_mode
;
164 static int qt202x_link_ok(struct efx_nic
*efx
)
166 return efx_mdio_links_ok(efx
, QT202X_REQUIRED_DEVS
);
169 static bool qt202x_phy_poll(struct efx_nic
*efx
)
171 bool was_up
= efx
->link_state
.up
;
173 efx
->link_state
.up
= qt202x_link_ok(efx
);
174 efx
->link_state
.speed
= 10000;
175 efx
->link_state
.fd
= true;
176 efx
->link_state
.fc
= efx
->wanted_fc
;
178 return efx
->link_state
.up
!= was_up
;
181 static int qt202x_phy_reconfigure(struct efx_nic
*efx
)
183 struct qt202x_phy_data
*phy_data
= efx
->phy_data
;
185 if (efx
->phy_type
== PHY_TYPE_QT2025C
) {
186 /* There are several different register bits which can
187 * disable TX (and save power) on direct-attach cables
188 * or optical transceivers, varying somewhat between
189 * firmware versions. Only 'static mode' appears to
190 * cover everything. */
192 &efx
->mdio
, efx
->mdio
.prtad
, MDIO_MMD_PMAPMD
,
193 PMA_PMD_FTX_CTRL2_REG
, 1 << PMA_PMD_FTX_STATIC_LBN
,
194 efx
->phy_mode
& PHY_MODE_TX_DISABLED
||
195 efx
->phy_mode
& PHY_MODE_LOW_POWER
||
196 efx
->loopback_mode
== LOOPBACK_PCS
||
197 efx
->loopback_mode
== LOOPBACK_PMAPMD
);
199 /* Reset the PHY when moving from tx off to tx on */
200 if (!(efx
->phy_mode
& PHY_MODE_TX_DISABLED
) &&
201 (phy_data
->phy_mode
& PHY_MODE_TX_DISABLED
))
202 qt202x_reset_phy(efx
);
204 efx_mdio_transmit_disable(efx
);
207 efx_mdio_phy_reconfigure(efx
);
209 phy_data
->phy_mode
= efx
->phy_mode
;
214 static void qt202x_phy_get_settings(struct efx_nic
*efx
, struct ethtool_cmd
*ecmd
)
216 mdio45_ethtool_gset(&efx
->mdio
, ecmd
);
219 static void qt202x_phy_fini(struct efx_nic
*efx
)
221 /* Free the context block */
222 kfree(efx
->phy_data
);
223 efx
->phy_data
= NULL
;
226 struct efx_phy_operations falcon_qt202x_phy_ops
= {
228 .init
= qt202x_phy_init
,
229 .reconfigure
= qt202x_phy_reconfigure
,
230 .poll
= qt202x_phy_poll
,
231 .fini
= qt202x_phy_fini
,
232 .get_settings
= qt202x_phy_get_settings
,
233 .set_settings
= efx_mdio_set_settings
,
234 .mmds
= QT202X_REQUIRED_DEVS
,
235 .loopbacks
= QT202X_LOOPBACKS
,