blob: 345ffc310dca20c72053528ed7ed7f32f533a466 [file] [log] [blame]
Ben Hutchings8ceee662008-04-27 12:55:59 +01001/****************************************************************************
2 * Driver for Solarflare Solarstorm network controllers and boards
3 * Copyright 2006-2008 Solarflare Communications Inc.
4 *
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.
8 */
9/*
10 * Driver for XFP optical PHYs (plus some support specific to the Quake 2032)
11 * See www.amcc.com for details (search for qt2032)
12 */
13
14#include <linux/timer.h>
15#include <linux/delay.h>
16#include "efx.h"
Ben Hutchings8ceee662008-04-27 12:55:59 +010017#include "mdio_10g.h"
18#include "xenpack.h"
19#include "phy.h"
Ben Hutchings177dfcd2008-12-12 21:50:08 -080020#include "falcon.h"
Ben Hutchings8ceee662008-04-27 12:55:59 +010021
Ben Hutchings27dd2ca2008-12-12 21:44:14 -080022#define XFP_REQUIRED_DEVS (MDIO_MMDREG_DEVS_PCS | \
23 MDIO_MMDREG_DEVS_PMAPMD | \
24 MDIO_MMDREG_DEVS_PHYXS)
Ben Hutchings8ceee662008-04-27 12:55:59 +010025
Ben Hutchings3273c2e2008-05-07 13:36:19 +010026#define XFP_LOOPBACKS ((1 << LOOPBACK_PCS) | \
27 (1 << LOOPBACK_PMAPMD) | \
28 (1 << LOOPBACK_NETWORK))
29
Ben Hutchings8ceee662008-04-27 12:55:59 +010030/****************************************************************************/
31/* Quake-specific MDIO registers */
32#define MDIO_QUAKE_LED0_REG (0xD006)
33
34void xfp_set_led(struct efx_nic *p, int led, int mode)
35{
36 int addr = MDIO_QUAKE_LED0_REG + led;
37 mdio_clause45_write(p, p->mii.phy_id, MDIO_MMD_PMAPMD, addr,
38 mode);
39}
40
Ben Hutchings3273c2e2008-05-07 13:36:19 +010041struct xfp_phy_data {
Ben Hutchingsf8b87c12008-09-01 12:48:17 +010042 enum efx_phy_mode phy_mode;
Ben Hutchings3273c2e2008-05-07 13:36:19 +010043};
44
Ben Hutchings8ceee662008-04-27 12:55:59 +010045#define XFP_MAX_RESET_TIME 500
46#define XFP_RESET_WAIT 10
47
48/* Reset the PHYXS MMD. This is documented (for the Quake PHY) as doing
49 * a complete soft reset.
50 */
51static int xfp_reset_phy(struct efx_nic *efx)
52{
53 int rc;
54
55 rc = mdio_clause45_reset_mmd(efx, MDIO_MMD_PHYXS,
56 XFP_MAX_RESET_TIME / XFP_RESET_WAIT,
57 XFP_RESET_WAIT);
58 if (rc < 0)
59 goto fail;
60
61 /* Wait 250ms for the PHY to complete bootup */
62 msleep(250);
63
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,
Ben Hutchings27dd2ca2008-12-12 21:44:14 -080067 MDIO_MMDREG_DEVS_PHYXS);
Ben Hutchings8ceee662008-04-27 12:55:59 +010068 if (rc < 0)
69 goto fail;
70
71 efx->board_info.init_leds(efx);
72
73 return rc;
74
75 fail:
76 EFX_ERR(efx, "XFP: reset timed out!\n");
77 return rc;
78}
79
80static int xfp_phy_init(struct efx_nic *efx)
81{
Ben Hutchings3273c2e2008-05-07 13:36:19 +010082 struct xfp_phy_data *phy_data;
Ben Hutchings8ceee662008-04-27 12:55:59 +010083 u32 devid = mdio_clause45_read_id(efx, MDIO_MMD_PHYXS);
84 int rc;
85
Ben Hutchings3273c2e2008-05-07 13:36:19 +010086 phy_data = kzalloc(sizeof(struct xfp_phy_data), GFP_KERNEL);
Ben Hutchings9b7bfc42008-05-16 21:20:20 +010087 if (!phy_data)
88 return -ENOMEM;
Ben Hutchingsd3208b52008-05-16 21:20:00 +010089 efx->phy_data = phy_data;
Ben Hutchings3273c2e2008-05-07 13:36:19 +010090
Ben Hutchings8ceee662008-04-27 12:55:59 +010091 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),
93 MDIO_ID_REV(devid));
94
Ben Hutchingsf8b87c12008-09-01 12:48:17 +010095 phy_data->phy_mode = efx->phy_mode;
Ben Hutchings3273c2e2008-05-07 13:36:19 +010096
Ben Hutchings8ceee662008-04-27 12:55:59 +010097 rc = xfp_reset_phy(efx);
98
99 EFX_INFO(efx, "XFP: PHY init %s.\n",
100 rc ? "failed" : "successful");
Ben Hutchings3273c2e2008-05-07 13:36:19 +0100101 if (rc < 0)
102 goto fail;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100103
Ben Hutchings3273c2e2008-05-07 13:36:19 +0100104 return 0;
105
106 fail:
107 kfree(efx->phy_data);
108 efx->phy_data = NULL;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100109 return rc;
110}
111
112static void xfp_phy_clear_interrupt(struct efx_nic *efx)
113{
114 xenpack_clear_lasi_irqs(efx);
115}
116
117static int xfp_link_ok(struct efx_nic *efx)
118{
119 return mdio_clause45_links_ok(efx, XFP_REQUIRED_DEVS);
120}
121
Ben Hutchings766ca0f2008-12-12 21:59:24 -0800122static void xfp_phy_poll(struct efx_nic *efx)
Ben Hutchings8ceee662008-04-27 12:55:59 +0100123{
Ben Hutchings8ceee662008-04-27 12:55:59 +0100124 int link_up = xfp_link_ok(efx);
125 /* Simulate a PHY event if link state has changed */
126 if (link_up != efx->link_up)
Ben Hutchings177dfcd2008-12-12 21:50:08 -0800127 falcon_sim_phy_event(efx);
Ben Hutchings8ceee662008-04-27 12:55:59 +0100128}
129
130static void xfp_phy_reconfigure(struct efx_nic *efx)
131{
Ben Hutchings3273c2e2008-05-07 13:36:19 +0100132 struct xfp_phy_data *phy_data = efx->phy_data;
133
134 /* Reset the PHY when moving from tx off to tx on */
Ben Hutchingsf8b87c12008-09-01 12:48:17 +0100135 if (!(efx->phy_mode & PHY_MODE_TX_DISABLED) &&
136 (phy_data->phy_mode & PHY_MODE_TX_DISABLED))
Ben Hutchings3273c2e2008-05-07 13:36:19 +0100137 xfp_reset_phy(efx);
138
139 mdio_clause45_transmit_disable(efx);
140 mdio_clause45_phy_reconfigure(efx);
141
Ben Hutchingsf8b87c12008-09-01 12:48:17 +0100142 phy_data->phy_mode = efx->phy_mode;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100143 efx->link_up = xfp_link_ok(efx);
Ben Hutchingsf31a45d2008-12-12 21:43:33 -0800144 efx->link_speed = 10000;
145 efx->link_fd = true;
Ben Hutchings04cc8ca2008-12-12 21:50:46 -0800146 efx->link_fc = efx->wanted_fc;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100147}
148
149
150static void xfp_phy_fini(struct efx_nic *efx)
151{
152 /* Clobber the LED if it was blinking */
Ben Hutchingsdc8cfa52008-09-01 12:46:50 +0100153 efx->board_info.blink(efx, false);
Ben Hutchings3273c2e2008-05-07 13:36:19 +0100154
155 /* Free the context block */
156 kfree(efx->phy_data);
157 efx->phy_data = NULL;
Ben Hutchings8ceee662008-04-27 12:55:59 +0100158}
159
160struct efx_phy_operations falcon_xfp_phy_ops = {
Ben Hutchings177dfcd2008-12-12 21:50:08 -0800161 .macs = EFX_XMAC,
Ben Hutchings8ceee662008-04-27 12:55:59 +0100162 .init = xfp_phy_init,
163 .reconfigure = xfp_phy_reconfigure,
Ben Hutchings766ca0f2008-12-12 21:59:24 -0800164 .poll = xfp_phy_poll,
Ben Hutchings8ceee662008-04-27 12:55:59 +0100165 .fini = xfp_phy_fini,
166 .clear_interrupt = xfp_phy_clear_interrupt,
Ben Hutchings177dfcd2008-12-12 21:50:08 -0800167 .get_settings = mdio_clause45_get_settings,
168 .set_settings = mdio_clause45_set_settings,
Ben Hutchings8ceee662008-04-27 12:55:59 +0100169 .mmds = XFP_REQUIRED_DEVS,
Ben Hutchings3273c2e2008-05-07 13:36:19 +0100170 .loopbacks = XFP_LOOPBACKS,
Ben Hutchings8ceee662008-04-27 12:55:59 +0100171};