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8ceee660 BH |
1 | /**************************************************************************** |
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 | /* | |
d2d2c373 BH |
10 | * Driver for SFP+ and XFP optical PHYs plus some support specific to the |
11 | * AMCC QT20xx adapters; see www.amcc.com for details | |
8ceee660 BH |
12 | */ |
13 | ||
14 | #include <linux/timer.h> | |
15 | #include <linux/delay.h> | |
16 | #include "efx.h" | |
8ceee660 | 17 | #include "mdio_10g.h" |
8ceee660 | 18 | #include "phy.h" |
177dfcd8 | 19 | #include "falcon.h" |
8ceee660 | 20 | |
68e7f45e BH |
21 | #define XFP_REQUIRED_DEVS (MDIO_DEVS_PCS | \ |
22 | MDIO_DEVS_PMAPMD | \ | |
23 | MDIO_DEVS_PHYXS) | |
8ceee660 | 24 | |
3273c2e8 BH |
25 | #define XFP_LOOPBACKS ((1 << LOOPBACK_PCS) | \ |
26 | (1 << LOOPBACK_PMAPMD) | \ | |
27 | (1 << LOOPBACK_NETWORK)) | |
28 | ||
8ceee660 BH |
29 | /****************************************************************************/ |
30 | /* Quake-specific MDIO registers */ | |
31 | #define MDIO_QUAKE_LED0_REG (0xD006) | |
32 | ||
d2d2c373 BH |
33 | /* QT2025C only */ |
34 | #define PCS_FW_HEARTBEAT_REG 0xd7ee | |
35 | #define PCS_FW_HEARTB_LBN 0 | |
36 | #define PCS_FW_HEARTB_WIDTH 8 | |
37 | #define PCS_UC8051_STATUS_REG 0xd7fd | |
38 | #define PCS_UC_STATUS_LBN 0 | |
39 | #define PCS_UC_STATUS_WIDTH 8 | |
40 | #define PCS_UC_STATUS_FW_SAVE 0x20 | |
41 | #define PMA_PMD_FTX_CTRL2_REG 0xc309 | |
42 | #define PMA_PMD_FTX_STATIC_LBN 13 | |
43 | #define PMA_PMD_VEND1_REG 0xc001 | |
44 | #define PMA_PMD_VEND1_LBTXD_LBN 15 | |
45 | #define PCS_VEND1_REG 0xc000 | |
46 | #define PCS_VEND1_LBTXD_LBN 5 | |
47 | ||
8ceee660 BH |
48 | void xfp_set_led(struct efx_nic *p, int led, int mode) |
49 | { | |
50 | int addr = MDIO_QUAKE_LED0_REG + led; | |
68e7f45e | 51 | efx_mdio_write(p, MDIO_MMD_PMAPMD, addr, mode); |
8ceee660 BH |
52 | } |
53 | ||
3273c2e8 | 54 | struct xfp_phy_data { |
f8b87c17 | 55 | enum efx_phy_mode phy_mode; |
3273c2e8 BH |
56 | }; |
57 | ||
8ceee660 BH |
58 | #define XFP_MAX_RESET_TIME 500 |
59 | #define XFP_RESET_WAIT 10 | |
60 | ||
d2d2c373 BH |
61 | static int qt2025c_wait_reset(struct efx_nic *efx) |
62 | { | |
63 | unsigned long timeout = jiffies + 10 * HZ; | |
d2d2c373 BH |
64 | int reg, old_counter = 0; |
65 | ||
66 | /* Wait for firmware heartbeat to start */ | |
67 | for (;;) { | |
68 | int counter; | |
68e7f45e | 69 | reg = efx_mdio_read(efx, MDIO_MMD_PCS, PCS_FW_HEARTBEAT_REG); |
d2d2c373 BH |
70 | if (reg < 0) |
71 | return reg; | |
72 | counter = ((reg >> PCS_FW_HEARTB_LBN) & | |
73 | ((1 << PCS_FW_HEARTB_WIDTH) - 1)); | |
74 | if (old_counter == 0) | |
75 | old_counter = counter; | |
76 | else if (counter != old_counter) | |
77 | break; | |
78 | if (time_after(jiffies, timeout)) | |
79 | return -ETIMEDOUT; | |
80 | msleep(10); | |
81 | } | |
82 | ||
83 | /* Wait for firmware status to look good */ | |
84 | for (;;) { | |
68e7f45e | 85 | reg = efx_mdio_read(efx, MDIO_MMD_PCS, PCS_UC8051_STATUS_REG); |
d2d2c373 BH |
86 | if (reg < 0) |
87 | return reg; | |
88 | if ((reg & | |
89 | ((1 << PCS_UC_STATUS_WIDTH) - 1) << PCS_UC_STATUS_LBN) >= | |
90 | PCS_UC_STATUS_FW_SAVE) | |
91 | break; | |
92 | if (time_after(jiffies, timeout)) | |
93 | return -ETIMEDOUT; | |
94 | msleep(100); | |
95 | } | |
96 | ||
97 | return 0; | |
98 | } | |
99 | ||
8ceee660 BH |
100 | static int xfp_reset_phy(struct efx_nic *efx) |
101 | { | |
102 | int rc; | |
103 | ||
d2d2c373 | 104 | if (efx->phy_type == PHY_TYPE_QT2025C) { |
5afaa753 BH |
105 | /* Wait for the reset triggered by falcon_reset_hw() |
106 | * to complete */ | |
d2d2c373 BH |
107 | rc = qt2025c_wait_reset(efx); |
108 | if (rc < 0) | |
109 | goto fail; | |
5afaa753 BH |
110 | } else { |
111 | /* Reset the PHYXS MMD. This is documented as doing | |
112 | * a complete soft reset. */ | |
113 | rc = efx_mdio_reset_mmd(efx, MDIO_MMD_PHYXS, | |
114 | XFP_MAX_RESET_TIME / XFP_RESET_WAIT, | |
115 | XFP_RESET_WAIT); | |
116 | if (rc < 0) | |
117 | goto fail; | |
d2d2c373 BH |
118 | } |
119 | ||
8ceee660 BH |
120 | /* Wait 250ms for the PHY to complete bootup */ |
121 | msleep(250); | |
122 | ||
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 */ | |
68e7f45e | 125 | rc = efx_mdio_check_mmds(efx, XFP_REQUIRED_DEVS, MDIO_DEVS_PHYXS); |
8ceee660 BH |
126 | if (rc < 0) |
127 | goto fail; | |
128 | ||
129 | efx->board_info.init_leds(efx); | |
130 | ||
131 | return rc; | |
132 | ||
133 | fail: | |
f794fd44 | 134 | EFX_ERR(efx, "PHY reset timed out\n"); |
8ceee660 BH |
135 | return rc; |
136 | } | |
137 | ||
138 | static int xfp_phy_init(struct efx_nic *efx) | |
139 | { | |
3273c2e8 | 140 | struct xfp_phy_data *phy_data; |
68e7f45e | 141 | u32 devid = efx_mdio_read_id(efx, MDIO_MMD_PHYXS); |
8ceee660 BH |
142 | int rc; |
143 | ||
3273c2e8 | 144 | phy_data = kzalloc(sizeof(struct xfp_phy_data), GFP_KERNEL); |
9b7bfc4c BH |
145 | if (!phy_data) |
146 | return -ENOMEM; | |
d3208b5e | 147 | efx->phy_data = phy_data; |
3273c2e8 | 148 | |
3f39a5e9 | 149 | EFX_INFO(efx, "PHY ID reg %x (OUI %06x model %02x revision %x)\n", |
68e7f45e BH |
150 | devid, efx_mdio_id_oui(devid), efx_mdio_id_model(devid), |
151 | efx_mdio_id_rev(devid)); | |
8ceee660 | 152 | |
f8b87c17 | 153 | phy_data->phy_mode = efx->phy_mode; |
3273c2e8 | 154 | |
8ceee660 BH |
155 | rc = xfp_reset_phy(efx); |
156 | ||
f794fd44 | 157 | EFX_INFO(efx, "PHY init %s.\n", |
8ceee660 | 158 | rc ? "failed" : "successful"); |
3273c2e8 BH |
159 | if (rc < 0) |
160 | goto fail; | |
8ceee660 | 161 | |
3273c2e8 BH |
162 | return 0; |
163 | ||
164 | fail: | |
165 | kfree(efx->phy_data); | |
166 | efx->phy_data = NULL; | |
8ceee660 BH |
167 | return rc; |
168 | } | |
169 | ||
170 | static void xfp_phy_clear_interrupt(struct efx_nic *efx) | |
171 | { | |
6bc5046e BH |
172 | /* Read to clear link status alarm */ |
173 | efx_mdio_read(efx, MDIO_MMD_PMAPMD, MDIO_PMA_LASI_STAT); | |
8ceee660 BH |
174 | } |
175 | ||
176 | static int xfp_link_ok(struct efx_nic *efx) | |
177 | { | |
68e7f45e | 178 | return efx_mdio_links_ok(efx, XFP_REQUIRED_DEVS); |
8ceee660 BH |
179 | } |
180 | ||
766ca0fa | 181 | static void xfp_phy_poll(struct efx_nic *efx) |
8ceee660 | 182 | { |
8ceee660 BH |
183 | int link_up = xfp_link_ok(efx); |
184 | /* Simulate a PHY event if link state has changed */ | |
185 | if (link_up != efx->link_up) | |
177dfcd8 | 186 | falcon_sim_phy_event(efx); |
8ceee660 BH |
187 | } |
188 | ||
189 | static void xfp_phy_reconfigure(struct efx_nic *efx) | |
190 | { | |
3273c2e8 BH |
191 | struct xfp_phy_data *phy_data = efx->phy_data; |
192 | ||
d2d2c373 BH |
193 | if (efx->phy_type == PHY_TYPE_QT2025C) { |
194 | /* There are several different register bits which can | |
195 | * disable TX (and save power) on direct-attach cables | |
196 | * or optical transceivers, varying somewhat between | |
197 | * firmware versions. Only 'static mode' appears to | |
198 | * cover everything. */ | |
68e7f45e BH |
199 | mdio_set_flag( |
200 | &efx->mdio, efx->mdio.prtad, MDIO_MMD_PMAPMD, | |
201 | PMA_PMD_FTX_CTRL2_REG, 1 << PMA_PMD_FTX_STATIC_LBN, | |
d2d2c373 BH |
202 | efx->phy_mode & PHY_MODE_TX_DISABLED || |
203 | efx->phy_mode & PHY_MODE_LOW_POWER || | |
204 | efx->loopback_mode == LOOPBACK_PCS || | |
205 | efx->loopback_mode == LOOPBACK_PMAPMD); | |
206 | } else { | |
207 | /* Reset the PHY when moving from tx off to tx on */ | |
208 | if (!(efx->phy_mode & PHY_MODE_TX_DISABLED) && | |
209 | (phy_data->phy_mode & PHY_MODE_TX_DISABLED)) | |
210 | xfp_reset_phy(efx); | |
211 | ||
68e7f45e | 212 | efx_mdio_transmit_disable(efx); |
d2d2c373 | 213 | } |
3273c2e8 | 214 | |
68e7f45e | 215 | efx_mdio_phy_reconfigure(efx); |
3273c2e8 | 216 | |
f8b87c17 | 217 | phy_data->phy_mode = efx->phy_mode; |
8ceee660 | 218 | efx->link_up = xfp_link_ok(efx); |
f31a45d2 BH |
219 | efx->link_speed = 10000; |
220 | efx->link_fd = true; | |
04cc8cac | 221 | efx->link_fc = efx->wanted_fc; |
8ceee660 BH |
222 | } |
223 | ||
68e7f45e BH |
224 | static void xfp_phy_get_settings(struct efx_nic *efx, struct ethtool_cmd *ecmd) |
225 | { | |
226 | mdio45_ethtool_gset(&efx->mdio, ecmd); | |
227 | } | |
8ceee660 BH |
228 | |
229 | static void xfp_phy_fini(struct efx_nic *efx) | |
230 | { | |
231 | /* Clobber the LED if it was blinking */ | |
dc8cfa55 | 232 | efx->board_info.blink(efx, false); |
3273c2e8 BH |
233 | |
234 | /* Free the context block */ | |
235 | kfree(efx->phy_data); | |
236 | efx->phy_data = NULL; | |
8ceee660 BH |
237 | } |
238 | ||
239 | struct efx_phy_operations falcon_xfp_phy_ops = { | |
177dfcd8 | 240 | .macs = EFX_XMAC, |
8ceee660 BH |
241 | .init = xfp_phy_init, |
242 | .reconfigure = xfp_phy_reconfigure, | |
766ca0fa | 243 | .poll = xfp_phy_poll, |
8ceee660 BH |
244 | .fini = xfp_phy_fini, |
245 | .clear_interrupt = xfp_phy_clear_interrupt, | |
68e7f45e BH |
246 | .get_settings = xfp_phy_get_settings, |
247 | .set_settings = efx_mdio_set_settings, | |
8ceee660 | 248 | .mmds = XFP_REQUIRED_DEVS, |
3273c2e8 | 249 | .loopbacks = XFP_LOOPBACKS, |
8ceee660 | 250 | }; |