1 /****************************************************************************
2 * Driver for Solarflare Solarstorm network controllers and boards
3 * Copyright 2006-2009 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_PHYXS_WS))
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_probe(struct efx_nic *efx)
140 struct qt202x_phy_data *phy_data;
142 phy_data = kzalloc(sizeof(struct qt202x_phy_data), GFP_KERNEL);
145 efx->phy_data = phy_data;
146 phy_data->phy_mode = efx->phy_mode;
148 efx->mdio.mmds = QT202X_REQUIRED_DEVS;
149 efx->mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
150 efx->loopback_modes = QT202X_LOOPBACKS | FALCON_XMAC_LOOPBACKS;
154 static int qt202x_phy_init(struct efx_nic *efx)
159 rc = qt202x_reset_phy(efx);
161 EFX_ERR(efx, "PHY init failed\n");
165 devid = efx_mdio_read_id(efx, MDIO_MMD_PHYXS);
166 EFX_INFO(efx, "PHY ID reg %x (OUI %06x model %02x revision %x)\n",
167 devid, efx_mdio_id_oui(devid), efx_mdio_id_model(devid),
168 efx_mdio_id_rev(devid));
173 static int qt202x_link_ok(struct efx_nic *efx)
175 return efx_mdio_links_ok(efx, QT202X_REQUIRED_DEVS);
178 static bool qt202x_phy_poll(struct efx_nic *efx)
180 bool was_up = efx->link_state.up;
182 efx->link_state.up = qt202x_link_ok(efx);
183 efx->link_state.speed = 10000;
184 efx->link_state.fd = true;
185 efx->link_state.fc = efx->wanted_fc;
187 return efx->link_state.up != was_up;
190 static int qt202x_phy_reconfigure(struct efx_nic *efx)
192 struct qt202x_phy_data *phy_data = efx->phy_data;
194 if (efx->phy_type == PHY_TYPE_QT2025C) {
195 /* There are several different register bits which can
196 * disable TX (and save power) on direct-attach cables
197 * or optical transceivers, varying somewhat between
198 * firmware versions. Only 'static mode' appears to
199 * cover everything. */
201 &efx->mdio, efx->mdio.prtad, MDIO_MMD_PMAPMD,
202 PMA_PMD_FTX_CTRL2_REG, 1 << PMA_PMD_FTX_STATIC_LBN,
203 efx->phy_mode & PHY_MODE_TX_DISABLED ||
204 efx->phy_mode & PHY_MODE_LOW_POWER ||
205 efx->loopback_mode == LOOPBACK_PCS ||
206 efx->loopback_mode == LOOPBACK_PMAPMD);
208 /* Reset the PHY when moving from tx off to tx on */
209 if (!(efx->phy_mode & PHY_MODE_TX_DISABLED) &&
210 (phy_data->phy_mode & PHY_MODE_TX_DISABLED))
211 qt202x_reset_phy(efx);
213 efx_mdio_transmit_disable(efx);
216 efx_mdio_phy_reconfigure(efx);
218 phy_data->phy_mode = efx->phy_mode;
223 static void qt202x_phy_get_settings(struct efx_nic *efx, struct ethtool_cmd *ecmd)
225 mdio45_ethtool_gset(&efx->mdio, ecmd);
228 static void qt202x_phy_remove(struct efx_nic *efx)
230 /* Free the context block */
231 kfree(efx->phy_data);
232 efx->phy_data = NULL;
235 struct efx_phy_operations falcon_qt202x_phy_ops = {
236 .probe = qt202x_phy_probe,
237 .init = qt202x_phy_init,
238 .reconfigure = qt202x_phy_reconfigure,
239 .poll = qt202x_phy_poll,
240 .fini = efx_port_dummy_op_void,
241 .remove = qt202x_phy_remove,
242 .get_settings = qt202x_phy_get_settings,
243 .set_settings = efx_mdio_set_settings,