2 * drivers/net/phy/lxt.c
4 * Driver for Intel LXT PHYs
8 * Copyright (c) 2004 Freescale Semiconductor, Inc.
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation; either version 2 of the License, or (at your
13 * option) any later version.
16 #include <linux/kernel.h>
17 #include <linux/string.h>
18 #include <linux/errno.h>
19 #include <linux/unistd.h>
20 #include <linux/interrupt.h>
21 #include <linux/init.h>
22 #include <linux/delay.h>
23 #include <linux/netdevice.h>
24 #include <linux/etherdevice.h>
25 #include <linux/skbuff.h>
26 #include <linux/spinlock.h>
28 #include <linux/module.h>
29 #include <linux/mii.h>
30 #include <linux/ethtool.h>
31 #include <linux/phy.h>
35 #include <asm/uaccess.h>
37 /* The Level one LXT970 is used by many boards */
39 #define MII_LXT970_IER 17 /* Interrupt Enable Register */
41 #define MII_LXT970_IER_IEN 0x0002
43 #define MII_LXT970_ISR 18 /* Interrupt Status Register */
45 #define MII_LXT970_CONFIG 19 /* Configuration Register */
47 /* ------------------------------------------------------------------------- */
48 /* The Level one LXT971 is used on some of my custom boards */
50 /* register definitions for the 971 */
51 #define MII_LXT971_IER 18 /* Interrupt Enable Register */
52 #define MII_LXT971_IER_IEN 0x00f2
54 #define MII_LXT971_ISR 19 /* Interrupt Status Register */
56 /* register definitions for the 973 */
57 #define MII_LXT973_PCR 16 /* Port Configuration Register */
58 #define PCR_FIBER_SELECT 1
60 MODULE_DESCRIPTION("Intel LXT PHY driver");
61 MODULE_AUTHOR("Andy Fleming");
62 MODULE_LICENSE("GPL");
64 static int lxt970_ack_interrupt(struct phy_device *phydev)
68 err = phy_read(phydev, MII_BMSR);
73 err = phy_read(phydev, MII_LXT970_ISR);
81 static int lxt970_config_intr(struct phy_device *phydev)
83 if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
84 return phy_write(phydev, MII_LXT970_IER, MII_LXT970_IER_IEN);
86 return phy_write(phydev, MII_LXT970_IER, 0);
89 static int lxt970_config_init(struct phy_device *phydev)
93 err = phy_write(phydev, MII_LXT970_CONFIG, 0);
99 static int lxt971_ack_interrupt(struct phy_device *phydev)
101 int err = phy_read(phydev, MII_LXT971_ISR);
109 static int lxt971_config_intr(struct phy_device *phydev)
111 if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
112 return phy_write(phydev, MII_LXT971_IER, MII_LXT971_IER_IEN);
114 return phy_write(phydev, MII_LXT971_IER, 0);
118 * A2 version of LXT973 chip has an ERRATA: it randomly return the contents
119 * of the previous even register when you read a odd register regularly
122 static int lxt973a2_update_link(struct phy_device *phydev)
126 int retry = 8; /* we try 8 times */
129 status = phy_read(phydev, MII_BMSR);
134 control = phy_read(phydev, MII_BMCR);
139 /* Read link and autonegotiation status */
140 status = phy_read(phydev, MII_BMSR);
141 } while (status >= 0 && retry-- && status == control);
146 if ((status & BMSR_LSTATUS) == 0)
154 static int lxt973a2_read_status(struct phy_device *phydev)
161 /* Update the link, but return if there was an error */
162 err = lxt973a2_update_link(phydev);
166 if (AUTONEG_ENABLE == phydev->autoneg) {
169 adv = phy_read(phydev, MII_ADVERTISE);
175 lpa = phy_read(phydev, MII_LPA);
180 /* If both registers are equal, it is suspect but not
181 * impossible, hence a new try
183 } while (lpa == adv && retry--);
187 phydev->speed = SPEED_10;
188 phydev->duplex = DUPLEX_HALF;
189 phydev->pause = phydev->asym_pause = 0;
191 if (lpagb & (LPA_1000FULL | LPA_1000HALF)) {
192 phydev->speed = SPEED_1000;
194 if (lpagb & LPA_1000FULL)
195 phydev->duplex = DUPLEX_FULL;
196 } else if (lpa & (LPA_100FULL | LPA_100HALF)) {
197 phydev->speed = SPEED_100;
199 if (lpa & LPA_100FULL)
200 phydev->duplex = DUPLEX_FULL;
202 if (lpa & LPA_10FULL)
203 phydev->duplex = DUPLEX_FULL;
206 if (phydev->duplex == DUPLEX_FULL) {
207 phydev->pause = lpa & LPA_PAUSE_CAP ? 1 : 0;
208 phydev->asym_pause = lpa & LPA_PAUSE_ASYM ? 1 : 0;
211 int bmcr = phy_read(phydev, MII_BMCR);
216 if (bmcr & BMCR_FULLDPLX)
217 phydev->duplex = DUPLEX_FULL;
219 phydev->duplex = DUPLEX_HALF;
221 if (bmcr & BMCR_SPEED1000)
222 phydev->speed = SPEED_1000;
223 else if (bmcr & BMCR_SPEED100)
224 phydev->speed = SPEED_100;
226 phydev->speed = SPEED_10;
228 phydev->pause = phydev->asym_pause = 0;
234 static int lxt973_probe(struct phy_device *phydev)
236 int val = phy_read(phydev, MII_LXT973_PCR);
238 if (val & PCR_FIBER_SELECT) {
240 * If fiber is selected, then the only correct setting
241 * is 100Mbps, full duplex, and auto negotiation off.
243 val = phy_read(phydev, MII_BMCR);
244 val |= (BMCR_SPEED100 | BMCR_FULLDPLX);
245 val &= ~BMCR_ANENABLE;
246 phy_write(phydev, MII_BMCR, val);
247 /* Remember that the port is in fiber mode. */
248 phydev->priv = lxt973_probe;
255 static int lxt973_config_aneg(struct phy_device *phydev)
257 /* Do nothing if port is in fiber mode. */
258 return phydev->priv ? 0 : genphy_config_aneg(phydev);
261 static struct phy_driver lxt97x_driver[] = {
263 .phy_id = 0x78100000,
265 .phy_id_mask = 0xfffffff0,
266 .features = PHY_BASIC_FEATURES,
267 .flags = PHY_HAS_INTERRUPT,
268 .config_init = lxt970_config_init,
269 .config_aneg = genphy_config_aneg,
270 .read_status = genphy_read_status,
271 .ack_interrupt = lxt970_ack_interrupt,
272 .config_intr = lxt970_config_intr,
274 .phy_id = 0x001378e0,
276 .phy_id_mask = 0xfffffff0,
277 .features = PHY_BASIC_FEATURES,
278 .flags = PHY_HAS_INTERRUPT,
279 .config_aneg = genphy_config_aneg,
280 .read_status = genphy_read_status,
281 .ack_interrupt = lxt971_ack_interrupt,
282 .config_intr = lxt971_config_intr,
284 .phy_id = 0x00137a10,
286 .phy_id_mask = 0xffffffff,
287 .features = PHY_BASIC_FEATURES,
289 .probe = lxt973_probe,
290 .config_aneg = lxt973_config_aneg,
291 .read_status = lxt973a2_read_status,
293 .phy_id = 0x00137a10,
295 .phy_id_mask = 0xfffffff0,
296 .features = PHY_BASIC_FEATURES,
298 .probe = lxt973_probe,
299 .config_aneg = lxt973_config_aneg,
300 .read_status = genphy_read_status,
303 module_phy_driver(lxt97x_driver);
305 static struct mdio_device_id __maybe_unused lxt_tbl[] = {
306 { 0x78100000, 0xfffffff0 },
307 { 0x001378e0, 0xfffffff0 },
308 { 0x00137a10, 0xfffffff0 },
312 MODULE_DEVICE_TABLE(mdio, lxt_tbl);