1 /**************************************************************************
2
3 Copyright (c) 2008, Chelsio Inc.
4 All rights reserved.
5
6 Redistribution and use in source and binary forms, with or without
7 modification, are permitted provided that the following conditions are met:
8
9 1. Redistributions of source code must retain the above copyright notice,
10 this list of conditions and the following disclaimer.
11
12 2. Neither the name of the Chelsio Corporation nor the names of its
13 contributors may be used to endorse or promote products derived from
14 this software without specific prior written permission.
15
16 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
20 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 POSSIBILITY OF SUCH DAMAGE.
27
28 ***************************************************************************/
29
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD: releng/11.0/sys/dev/cxgb/common/cxgb_tn1010.c 276959 2015-01-11 07:51:58Z np $");
32
33 #include <cxgb_include.h>
34
35 #undef msleep
36 #define msleep t3_os_sleep
37
38 /* TN1010 PHY specific registers. */
39 enum {
40 TN1010_VEND1_STAT = 1,
41 };
42
43 /* IEEE auto-negotiation 10GBASE-T registers */
44 enum {
45 ANEG_ADVER = 16,
46 ANEG_LPA = 19,
47 ANEG_10G_CTRL = 32,
48 ANEG_10G_STAT = 33
49 };
50
51 #define ADVERTISE_ENPAGE (1 << 12)
52 #define ADVERTISE_10000FULL (1 << 12)
53 #define ADVERTISE_LOOP_TIMING (1 << 0)
54
55 /* vendor specific status register fields */
56 #define F_XS_LANE_ALIGN_STAT (1 << 0)
57 #define F_PCS_BLK_LOCK (1 << 1)
58 #define F_PMD_SIGNAL_OK (1 << 2)
59 #define F_LINK_STAT (1 << 3)
60 #define F_ANEG_SPEED_1G (1 << 4)
61 #define F_ANEG_MASTER (1 << 5)
62
63 #define S_ANEG_STAT 6
64 #define M_ANEG_STAT 0x3
65 #define G_ANEG_STAT(x) (((x) >> S_ANEG_STAT) & M_ANEG_STAT)
66
67 enum { /* autonegotiation status */
68 ANEG_IN_PROGR = 0,
69 ANEG_COMPLETE = 1,
70 ANEG_FAILED = 3
71 };
72
73 /*
74 * Reset the PHY. May take up to 500ms to complete.
75 */
76 static int tn1010_reset(struct cphy *phy, int wait)
77 {
78 int err = t3_phy_reset(phy, MDIO_DEV_PMA_PMD, wait);
79 msleep(500);
80 return err;
81 }
82
83 static int tn1010_power_down(struct cphy *phy, int enable)
84 {
85 return t3_mdio_change_bits(phy, MDIO_DEV_PMA_PMD, MII_BMCR,
86 BMCR_PDOWN, enable ? BMCR_PDOWN : 0);
87 }
88
89 static int tn1010_autoneg_enable(struct cphy *phy)
90 {
91 int err;
92
93 err = tn1010_power_down(phy, 0);
94 if (!err)
95 err = t3_mdio_change_bits(phy, MDIO_DEV_ANEG, MII_BMCR, 0,
96 BMCR_ANENABLE | BMCR_ANRESTART);
97 return err;
98 }
99
100 static int tn1010_autoneg_restart(struct cphy *phy)
101 {
102 int err;
103
104 err = tn1010_power_down(phy, 0);
105 if (!err)
106 err = t3_mdio_change_bits(phy, MDIO_DEV_ANEG, MII_BMCR, 0,
107 BMCR_ANRESTART);
108 return err;
109 }
110
111 static int tn1010_advertise(struct cphy *phy, unsigned int advert)
112 {
113 int err, val;
114
115 if (!(advert & ADVERTISED_1000baseT_Full))
116 return -EINVAL; /* PHY can't disable 1000BASE-T */
117
118 val = ADVERTISE_CSMA | ADVERTISE_ENPAGE | ADVERTISE_NPAGE;
119 if (advert & ADVERTISED_Pause)
120 val |= ADVERTISE_PAUSE_CAP;
121 if (advert & ADVERTISED_Asym_Pause)
122 val |= ADVERTISE_PAUSE_ASYM;
123 err = mdio_write(phy, MDIO_DEV_ANEG, ANEG_ADVER, val);
124 if (err)
125 return err;
126
127 val = (advert & ADVERTISED_10000baseT_Full) ? ADVERTISE_10000FULL : 0;
128 return mdio_write(phy, MDIO_DEV_ANEG, ANEG_10G_CTRL, val |
129 ADVERTISE_LOOP_TIMING);
130 }
131
132 static int tn1010_get_link_status(struct cphy *phy, int *link_state,
133 int *speed, int *duplex, int *fc)
134 {
135 unsigned int status, lpa, adv;
136 int err, sp = -1, pause = 0;
137
138 err = mdio_read(phy, MDIO_DEV_VEND1, TN1010_VEND1_STAT, &status);
139 if (err)
140 return err;
141
142 if (link_state)
143 *link_state = status & F_LINK_STAT ? PHY_LINK_UP :
144 PHY_LINK_DOWN;
145
146 if (G_ANEG_STAT(status) == ANEG_COMPLETE) {
147 sp = (status & F_ANEG_SPEED_1G) ? SPEED_1000 : SPEED_10000;
148
149 if (fc) {
150 err = mdio_read(phy, MDIO_DEV_ANEG, ANEG_LPA, &lpa);
151 if (!err)
152 err = mdio_read(phy, MDIO_DEV_ANEG, ANEG_ADVER,
153 &adv);
154 if (err)
155 return err;
156
157 if (lpa & adv & ADVERTISE_PAUSE_CAP)
158 pause = PAUSE_RX | PAUSE_TX;
159 else if ((lpa & ADVERTISE_PAUSE_CAP) &&
160 (lpa & ADVERTISE_PAUSE_ASYM) &&
161 (adv & ADVERTISE_PAUSE_ASYM))
162 pause = PAUSE_TX;
163 else if ((lpa & ADVERTISE_PAUSE_ASYM) &&
164 (adv & ADVERTISE_PAUSE_CAP))
165 pause = PAUSE_RX;
166 }
167 }
168 if (speed)
169 *speed = sp;
170 if (duplex)
171 *duplex = DUPLEX_FULL;
172 if (fc)
173 *fc = pause;
174 return 0;
175 }
176
177 static int tn1010_set_speed_duplex(struct cphy *phy, int speed, int duplex)
178 {
179 return -EINVAL; /* require autoneg */
180 }
181
182 #ifdef C99_NOT_SUPPORTED
183 static struct cphy_ops tn1010_ops = {
184 tn1010_reset,
185 t3_phy_lasi_intr_enable,
186 t3_phy_lasi_intr_disable,
187 t3_phy_lasi_intr_clear,
188 t3_phy_lasi_intr_handler,
189 tn1010_autoneg_enable,
190 tn1010_autoneg_restart,
191 tn1010_advertise,
192 NULL,
193 tn1010_set_speed_duplex,
194 tn1010_get_link_status,
195 tn1010_power_down,
196 };
197 #else
198 static struct cphy_ops tn1010_ops = {
199 .reset = tn1010_reset,
200 .intr_enable = t3_phy_lasi_intr_enable,
201 .intr_disable = t3_phy_lasi_intr_disable,
202 .intr_clear = t3_phy_lasi_intr_clear,
203 .intr_handler = t3_phy_lasi_intr_handler,
204 .autoneg_enable = tn1010_autoneg_enable,
205 .autoneg_restart = tn1010_autoneg_restart,
206 .advertise = tn1010_advertise,
207 .set_speed_duplex = tn1010_set_speed_duplex,
208 .get_link_status = tn1010_get_link_status,
209 .power_down = tn1010_power_down,
210 };
211 #endif
212
213 int t3_tn1010_phy_prep(pinfo_t *pinfo, int phy_addr,
214 const struct mdio_ops *mdio_ops)
215 {
216 cphy_init(&pinfo->phy, pinfo->adapter, pinfo, phy_addr, &tn1010_ops, mdio_ops,
217 SUPPORTED_1000baseT_Full | SUPPORTED_10000baseT_Full |
218 SUPPORTED_Autoneg | SUPPORTED_AUI | SUPPORTED_TP,
219 "1000/10GBASE-T");
220 msleep(500); /* PHY needs up to 500ms to start responding to MDIO */
221 return 0;
222 }
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