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 SFP+ and XFP optical PHYs plus some support specific to the
11 * AMCC QT20xx adapters; see www.amcc.com for details
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)
35 #define PCS_FW_HEARTBEAT_REG 0xd7ee
36 #define PCS_FW_HEARTB_LBN 0
37 #define PCS_FW_HEARTB_WIDTH 8
38 #define PCS_UC8051_STATUS_REG 0xd7fd
39 #define PCS_UC_STATUS_LBN 0
40 #define PCS_UC_STATUS_WIDTH 8
41 #define PCS_UC_STATUS_FW_SAVE 0x20
42 #define PMA_PMD_FTX_CTRL2_REG 0xc309
43 #define PMA_PMD_FTX_STATIC_LBN 13
44 #define PMA_PMD_VEND1_REG 0xc001
45 #define PMA_PMD_VEND1_LBTXD_LBN 15
46 #define PCS_VEND1_REG 0xc000
47 #define PCS_VEND1_LBTXD_LBN 5
49 void xfp_set_led(struct efx_nic *p, int led, int mode)
51 int addr = MDIO_QUAKE_LED0_REG + led;
52 mdio_clause45_write(p, p->mii.phy_id, MDIO_MMD_PMAPMD, addr,
57 enum efx_phy_mode phy_mode;
60 #define XFP_MAX_RESET_TIME 500
61 #define XFP_RESET_WAIT 10
63 static int qt2025c_wait_reset(struct efx_nic *efx)
65 unsigned long timeout = jiffies + 10 * HZ;
66 int phy_id = efx->mii.phy_id;
67 int reg, old_counter = 0;
69 /* Wait for firmware heartbeat to start */
72 reg = mdio_clause45_read(efx, phy_id, MDIO_MMD_PCS,
73 PCS_FW_HEARTBEAT_REG);
76 counter = ((reg >> PCS_FW_HEARTB_LBN) &
77 ((1 << PCS_FW_HEARTB_WIDTH) - 1));
79 old_counter = counter;
80 else if (counter != old_counter)
82 if (time_after(jiffies, timeout))
87 /* Wait for firmware status to look good */
89 reg = mdio_clause45_read(efx, phy_id, MDIO_MMD_PCS,
90 PCS_UC8051_STATUS_REG);
94 ((1 << PCS_UC_STATUS_WIDTH) - 1) << PCS_UC_STATUS_LBN) >=
95 PCS_UC_STATUS_FW_SAVE)
97 if (time_after(jiffies, timeout))
105 /* Reset the PHYXS MMD. This is documented (for the Quake PHYs) as doing
106 * a complete soft reset.
108 static int xfp_reset_phy(struct efx_nic *efx)
112 rc = mdio_clause45_reset_mmd(efx, MDIO_MMD_PHYXS,
113 XFP_MAX_RESET_TIME / XFP_RESET_WAIT,
118 if (efx->phy_type == PHY_TYPE_QT2025C) {
119 rc = qt2025c_wait_reset(efx);
124 /* Wait 250ms for the PHY to complete bootup */
127 /* Check that all the MMDs we expect are present and responding. We
128 * expect faults on some if the link is down, but not on the PHY XS */
129 rc = mdio_clause45_check_mmds(efx, XFP_REQUIRED_DEVS,
130 MDIO_MMDREG_DEVS_PHYXS);
134 efx->board_info.init_leds(efx);
139 EFX_ERR(efx, "PHY reset timed out\n");
143 static int xfp_phy_init(struct efx_nic *efx)
145 struct xfp_phy_data *phy_data;
146 u32 devid = mdio_clause45_read_id(efx, MDIO_MMD_PHYXS);
149 phy_data = kzalloc(sizeof(struct xfp_phy_data), GFP_KERNEL);
152 efx->phy_data = phy_data;
154 EFX_INFO(efx, "PHY ID reg %x (OUI %06x model %02x revision %x)\n",
155 devid, mdio_id_oui(devid), mdio_id_model(devid),
158 phy_data->phy_mode = efx->phy_mode;
160 rc = xfp_reset_phy(efx);
162 EFX_INFO(efx, "PHY init %s.\n",
163 rc ? "failed" : "successful");
170 kfree(efx->phy_data);
171 efx->phy_data = NULL;
175 static void xfp_phy_clear_interrupt(struct efx_nic *efx)
177 xenpack_clear_lasi_irqs(efx);
180 static int xfp_link_ok(struct efx_nic *efx)
182 return mdio_clause45_links_ok(efx, XFP_REQUIRED_DEVS);
185 static void xfp_phy_poll(struct efx_nic *efx)
187 int link_up = xfp_link_ok(efx);
188 /* Simulate a PHY event if link state has changed */
189 if (link_up != efx->link_up)
190 falcon_sim_phy_event(efx);
193 static void xfp_phy_reconfigure(struct efx_nic *efx)
195 struct xfp_phy_data *phy_data = efx->phy_data;
197 if (efx->phy_type == PHY_TYPE_QT2025C) {
198 /* There are several different register bits which can
199 * disable TX (and save power) on direct-attach cables
200 * or optical transceivers, varying somewhat between
201 * firmware versions. Only 'static mode' appears to
202 * cover everything. */
203 mdio_clause45_set_flag(
204 efx, efx->mii.phy_id, MDIO_MMD_PMAPMD,
205 PMA_PMD_FTX_CTRL2_REG, PMA_PMD_FTX_STATIC_LBN,
206 efx->phy_mode & PHY_MODE_TX_DISABLED ||
207 efx->phy_mode & PHY_MODE_LOW_POWER ||
208 efx->loopback_mode == LOOPBACK_PCS ||
209 efx->loopback_mode == LOOPBACK_PMAPMD);
211 /* Reset the PHY when moving from tx off to tx on */
212 if (!(efx->phy_mode & PHY_MODE_TX_DISABLED) &&
213 (phy_data->phy_mode & PHY_MODE_TX_DISABLED))
216 mdio_clause45_transmit_disable(efx);
219 mdio_clause45_phy_reconfigure(efx);
221 phy_data->phy_mode = efx->phy_mode;
222 efx->link_up = xfp_link_ok(efx);
223 efx->link_speed = 10000;
225 efx->link_fc = efx->wanted_fc;
229 static void xfp_phy_fini(struct efx_nic *efx)
231 /* Clobber the LED if it was blinking */
232 efx->board_info.blink(efx, false);
234 /* Free the context block */
235 kfree(efx->phy_data);
236 efx->phy_data = NULL;
239 struct efx_phy_operations falcon_xfp_phy_ops = {
241 .init = xfp_phy_init,
242 .reconfigure = xfp_phy_reconfigure,
243 .poll = xfp_phy_poll,
244 .fini = xfp_phy_fini,
245 .clear_interrupt = xfp_phy_clear_interrupt,
246 .get_settings = mdio_clause45_get_settings,
247 .set_settings = mdio_clause45_set_settings,
248 .mmds = XFP_REQUIRED_DEVS,
249 .loopbacks = XFP_LOOPBACKS,