4 * PHY drivers for the ibm ocp ethernet driver. Borrowed
5 * from sungem_phy.c, though I only kept the generic MII
8 * This file should be shared with other drivers or eventually
9 * merged as the "low level" part of miilib
11 * (c) 2003, Benjamin Herrenscmidt (benh@kernel.crashing.org)
15 #include <linux/config.h>
17 #include <linux/module.h>
19 #include <linux/kernel.h>
20 #include <linux/sched.h>
21 #include <linux/types.h>
22 #include <linux/netdevice.h>
23 #include <linux/etherdevice.h>
24 #include <linux/mii.h>
25 #include <linux/ethtool.h>
26 #include <linux/delay.h>
28 #include "ibm_emac_phy.h"
30 static int reset_one_mii_phy(struct mii_phy *phy, int phy_id)
35 val = __phy_read(phy, phy_id, MII_BMCR);
38 __phy_write(phy, phy_id, MII_BMCR, val);
43 val = __phy_read(phy, phy_id, MII_BMCR);
44 if ((val & BMCR_RESET) == 0)
48 if ((val & BMCR_ISOLATE) && limit > 0)
49 __phy_write(phy, phy_id, MII_BMCR, val & ~BMCR_ISOLATE);
54 static int cis8201_init(struct mii_phy *phy)
58 epcr = phy_read(phy, MII_CIS8201_EPCR);
59 epcr &= ~EPCR_MODE_MASK;
63 epcr |= EPCR_TBI_MODE;
66 epcr |= EPCR_RTBI_MODE;
69 epcr |= EPCR_GMII_MODE;
73 epcr |= EPCR_RGMII_MODE;
76 phy_write(phy, MII_CIS8201_EPCR, epcr);
81 static int genmii_setup_aneg(struct mii_phy *phy, u32 advertise)
86 phy->speed = SPEED_10;
87 phy->duplex = DUPLEX_HALF;
89 phy->advertising = advertise;
91 /* Setup standard advertise */
92 adv = phy_read(phy, MII_ADVERTISE);
93 adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4);
94 if (advertise & ADVERTISED_10baseT_Half)
95 adv |= ADVERTISE_10HALF;
96 if (advertise & ADVERTISED_10baseT_Full)
97 adv |= ADVERTISE_10FULL;
98 if (advertise & ADVERTISED_100baseT_Half)
99 adv |= ADVERTISE_100HALF;
100 if (advertise & ADVERTISED_100baseT_Full)
101 adv |= ADVERTISE_100FULL;
102 phy_write(phy, MII_ADVERTISE, adv);
104 /* Start/Restart aneg */
105 ctl = phy_read(phy, MII_BMCR);
106 ctl |= (BMCR_ANENABLE | BMCR_ANRESTART);
107 phy_write(phy, MII_BMCR, ctl);
112 static int genmii_setup_forced(struct mii_phy *phy, int speed, int fd)
121 ctl = phy_read(phy, MII_BMCR);
122 ctl &= ~(BMCR_FULLDPLX | BMCR_SPEED100 | BMCR_ANENABLE);
124 /* First reset the PHY */
125 phy_write(phy, MII_BMCR, ctl | BMCR_RESET);
127 /* Select speed & duplex */
132 ctl |= BMCR_SPEED100;
138 if (fd == DUPLEX_FULL)
139 ctl |= BMCR_FULLDPLX;
140 phy_write(phy, MII_BMCR, ctl);
145 static int genmii_poll_link(struct mii_phy *phy)
149 (void)phy_read(phy, MII_BMSR);
150 status = phy_read(phy, MII_BMSR);
151 if ((status & BMSR_LSTATUS) == 0)
153 if (phy->autoneg && !(status & BMSR_ANEGCOMPLETE))
158 #define MII_CIS8201_ACSR 0x1c
159 #define ACSR_DUPLEX_STATUS 0x0020
160 #define ACSR_SPEED_1000BASET 0x0010
161 #define ACSR_SPEED_100BASET 0x0008
163 static int cis8201_read_link(struct mii_phy *phy)
168 acsr = phy_read(phy, MII_CIS8201_ACSR);
170 if (acsr & ACSR_DUPLEX_STATUS)
171 phy->duplex = DUPLEX_FULL;
173 phy->duplex = DUPLEX_HALF;
174 if (acsr & ACSR_SPEED_1000BASET) {
175 phy->speed = SPEED_1000;
176 } else if (acsr & ACSR_SPEED_100BASET)
177 phy->speed = SPEED_100;
179 phy->speed = SPEED_10;
182 /* On non-aneg, we assume what we put in BMCR is the speed,
183 * though magic-aneg shouldn't prevent this case from occurring
189 static int genmii_read_link(struct mii_phy *phy)
194 lpa = phy_read(phy, MII_LPA) & phy_read(phy, MII_ADVERTISE);
196 phy->speed = SPEED_10;
197 phy->duplex = DUPLEX_HALF;
200 if (lpa & (LPA_100FULL | LPA_100HALF)) {
201 phy->speed = SPEED_100;
202 if (lpa & LPA_100FULL)
203 phy->duplex = DUPLEX_FULL;
204 } else if (lpa & LPA_10FULL)
205 phy->duplex = DUPLEX_FULL;
207 /* On non-aneg, we assume what we put in BMCR is the speed,
208 * though magic-aneg shouldn't prevent this case from occurring
214 #define MII_BASIC_FEATURES (SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full | \
215 SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full | \
216 SUPPORTED_Autoneg | SUPPORTED_TP | SUPPORTED_MII)
217 #define MII_GBIT_FEATURES (MII_BASIC_FEATURES | \
218 SUPPORTED_1000baseT_Half | SUPPORTED_1000baseT_Full)
220 /* CIS8201 phy ops */
221 static struct mii_phy_ops cis8201_phy_ops = {
223 setup_aneg:genmii_setup_aneg,
224 setup_forced:genmii_setup_forced,
225 poll_link:genmii_poll_link,
226 read_link:cis8201_read_link
229 /* Generic implementation for most 10/100 PHYs */
230 static struct mii_phy_ops generic_phy_ops = {
231 setup_aneg:genmii_setup_aneg,
232 setup_forced:genmii_setup_forced,
233 poll_link:genmii_poll_link,
234 read_link:genmii_read_link
237 static struct mii_phy_def cis8201_phy_def = {
239 phy_id_mask:0x000ffff0,
240 name:"CIS8201 Gigabit Ethernet",
241 features:MII_GBIT_FEATURES,
246 static struct mii_phy_def genmii_phy_def = {
248 phy_id_mask:0x00000000,
250 features:MII_BASIC_FEATURES,
255 static struct mii_phy_def *mii_phy_table[] = {
261 int mii_phy_probe(struct mii_phy *phy, int mii_id)
265 struct mii_phy_def *def;
269 phy->advertising = 0;
270 phy->mii_id = mii_id;
275 /* Take PHY out of isloate mode and reset it. */
276 rc = reset_one_mii_phy(phy, mii_id);
280 /* Read ID and find matching entry */
281 id = (phy_read(phy, MII_PHYSID1) << 16 | phy_read(phy, MII_PHYSID2))
283 for (i = 0; (def = mii_phy_table[i]) != NULL; i++)
284 if ((id & def->phy_id_mask) == def->phy_id)
286 /* Should never be NULL (we have a generic entry), but... */
292 /* Setup default advertising */
293 phy->advertising = def->features;
298 MODULE_LICENSE("GPL");