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00db8189 AF |
1 | /* |
2 | * drivers/net/phy/lxt.c | |
3 | * | |
4 | * Driver for Intel LXT PHYs | |
5 | * | |
6 | * Author: Andy Fleming | |
7 | * | |
8 | * Copyright (c) 2004 Freescale Semiconductor, Inc. | |
9 | * | |
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. | |
14 | * | |
15 | */ | |
00db8189 | 16 | #include <linux/kernel.h> |
00db8189 AF |
17 | #include <linux/string.h> |
18 | #include <linux/errno.h> | |
19 | #include <linux/unistd.h> | |
00db8189 AF |
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> | |
27 | #include <linux/mm.h> | |
28 | #include <linux/module.h> | |
00db8189 AF |
29 | #include <linux/mii.h> |
30 | #include <linux/ethtool.h> | |
31 | #include <linux/phy.h> | |
32 | ||
33 | #include <asm/io.h> | |
34 | #include <asm/irq.h> | |
35 | #include <asm/uaccess.h> | |
36 | ||
37 | /* The Level one LXT970 is used by many boards */ | |
38 | ||
39 | #define MII_LXT970_IER 17 /* Interrupt Enable Register */ | |
40 | ||
41 | #define MII_LXT970_IER_IEN 0x0002 | |
42 | ||
43 | #define MII_LXT970_ISR 18 /* Interrupt Status Register */ | |
44 | ||
45 | #define MII_LXT970_CONFIG 19 /* Configuration Register */ | |
46 | ||
47 | /* ------------------------------------------------------------------------- */ | |
48 | /* The Level one LXT971 is used on some of my custom boards */ | |
49 | ||
50 | /* register definitions for the 971 */ | |
51 | #define MII_LXT971_IER 18 /* Interrupt Enable Register */ | |
52 | #define MII_LXT971_IER_IEN 0x00f2 | |
53 | ||
54 | #define MII_LXT971_ISR 19 /* Interrupt Status Register */ | |
55 | ||
e13647c1 RC |
56 | /* register definitions for the 973 */ |
57 | #define MII_LXT973_PCR 16 /* Port Configuration Register */ | |
58 | #define PCR_FIBER_SELECT 1 | |
00db8189 AF |
59 | |
60 | MODULE_DESCRIPTION("Intel LXT PHY driver"); | |
61 | MODULE_AUTHOR("Andy Fleming"); | |
62 | MODULE_LICENSE("GPL"); | |
63 | ||
64 | static int lxt970_ack_interrupt(struct phy_device *phydev) | |
65 | { | |
66 | int err; | |
67 | ||
68 | err = phy_read(phydev, MII_BMSR); | |
69 | ||
70 | if (err < 0) | |
71 | return err; | |
72 | ||
73 | err = phy_read(phydev, MII_LXT970_ISR); | |
74 | ||
75 | if (err < 0) | |
76 | return err; | |
77 | ||
78 | return 0; | |
79 | } | |
80 | ||
81 | static int lxt970_config_intr(struct phy_device *phydev) | |
82 | { | |
5df47d5e | 83 | if (phydev->interrupts == PHY_INTERRUPT_ENABLED) |
04e6233d | 84 | return phy_write(phydev, MII_LXT970_IER, MII_LXT970_IER_IEN); |
00db8189 | 85 | else |
04e6233d | 86 | return phy_write(phydev, MII_LXT970_IER, 0); |
00db8189 AF |
87 | } |
88 | ||
89 | static int lxt970_config_init(struct phy_device *phydev) | |
90 | { | |
91 | int err; | |
92 | ||
93 | err = phy_write(phydev, MII_LXT970_CONFIG, 0); | |
94 | ||
95 | return err; | |
96 | } | |
97 | ||
98 | ||
99 | static int lxt971_ack_interrupt(struct phy_device *phydev) | |
100 | { | |
101 | int err = phy_read(phydev, MII_LXT971_ISR); | |
102 | ||
103 | if (err < 0) | |
104 | return err; | |
105 | ||
106 | return 0; | |
107 | } | |
108 | ||
109 | static int lxt971_config_intr(struct phy_device *phydev) | |
110 | { | |
5df47d5e | 111 | if (phydev->interrupts == PHY_INTERRUPT_ENABLED) |
04e6233d | 112 | return phy_write(phydev, MII_LXT971_IER, MII_LXT971_IER_IEN); |
00db8189 | 113 | else |
04e6233d | 114 | return phy_write(phydev, MII_LXT971_IER, 0); |
00db8189 AF |
115 | } |
116 | ||
871d1d6b LC |
117 | /* |
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 | |
120 | */ | |
121 | ||
122 | static int lxt973a2_update_link(struct phy_device *phydev) | |
123 | { | |
124 | int status; | |
125 | int control; | |
126 | int retry = 8; /* we try 8 times */ | |
127 | ||
128 | /* Do a fake read */ | |
129 | status = phy_read(phydev, MII_BMSR); | |
130 | ||
131 | if (status < 0) | |
132 | return status; | |
133 | ||
134 | control = phy_read(phydev, MII_BMCR); | |
135 | if (control < 0) | |
136 | return control; | |
137 | ||
138 | do { | |
139 | /* Read link and autonegotiation status */ | |
140 | status = phy_read(phydev, MII_BMSR); | |
141 | } while (status >= 0 && retry-- && status == control); | |
142 | ||
143 | if (status < 0) | |
144 | return status; | |
145 | ||
146 | if ((status & BMSR_LSTATUS) == 0) | |
147 | phydev->link = 0; | |
148 | else | |
149 | phydev->link = 1; | |
150 | ||
151 | return 0; | |
152 | } | |
153 | ||
19945333 | 154 | static int lxt973a2_read_status(struct phy_device *phydev) |
871d1d6b LC |
155 | { |
156 | int adv; | |
157 | int err; | |
158 | int lpa; | |
159 | int lpagb = 0; | |
160 | ||
161 | /* Update the link, but return if there was an error */ | |
162 | err = lxt973a2_update_link(phydev); | |
163 | if (err) | |
164 | return err; | |
165 | ||
166 | if (AUTONEG_ENABLE == phydev->autoneg) { | |
167 | int retry = 1; | |
168 | ||
169 | adv = phy_read(phydev, MII_ADVERTISE); | |
170 | ||
171 | if (adv < 0) | |
172 | return adv; | |
173 | ||
174 | do { | |
175 | lpa = phy_read(phydev, MII_LPA); | |
176 | ||
177 | if (lpa < 0) | |
178 | return lpa; | |
179 | ||
180 | /* If both registers are equal, it is suspect but not | |
181 | * impossible, hence a new try | |
182 | */ | |
183 | } while (lpa == adv && retry--); | |
184 | ||
185 | lpa &= adv; | |
186 | ||
187 | phydev->speed = SPEED_10; | |
188 | phydev->duplex = DUPLEX_HALF; | |
189 | phydev->pause = phydev->asym_pause = 0; | |
190 | ||
191 | if (lpagb & (LPA_1000FULL | LPA_1000HALF)) { | |
192 | phydev->speed = SPEED_1000; | |
193 | ||
194 | if (lpagb & LPA_1000FULL) | |
195 | phydev->duplex = DUPLEX_FULL; | |
196 | } else if (lpa & (LPA_100FULL | LPA_100HALF)) { | |
197 | phydev->speed = SPEED_100; | |
198 | ||
199 | if (lpa & LPA_100FULL) | |
200 | phydev->duplex = DUPLEX_FULL; | |
201 | } else { | |
202 | if (lpa & LPA_10FULL) | |
203 | phydev->duplex = DUPLEX_FULL; | |
204 | } | |
205 | ||
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; | |
209 | } | |
210 | } else { | |
211 | int bmcr = phy_read(phydev, MII_BMCR); | |
212 | ||
213 | if (bmcr < 0) | |
214 | return bmcr; | |
215 | ||
216 | if (bmcr & BMCR_FULLDPLX) | |
217 | phydev->duplex = DUPLEX_FULL; | |
218 | else | |
219 | phydev->duplex = DUPLEX_HALF; | |
220 | ||
221 | if (bmcr & BMCR_SPEED1000) | |
222 | phydev->speed = SPEED_1000; | |
223 | else if (bmcr & BMCR_SPEED100) | |
224 | phydev->speed = SPEED_100; | |
225 | else | |
226 | phydev->speed = SPEED_10; | |
227 | ||
228 | phydev->pause = phydev->asym_pause = 0; | |
229 | } | |
230 | ||
231 | return 0; | |
232 | } | |
233 | ||
e13647c1 RC |
234 | static int lxt973_probe(struct phy_device *phydev) |
235 | { | |
236 | int val = phy_read(phydev, MII_LXT973_PCR); | |
237 | ||
238 | if (val & PCR_FIBER_SELECT) { | |
239 | /* | |
240 | * If fiber is selected, then the only correct setting | |
241 | * is 100Mbps, full duplex, and auto negotiation off. | |
242 | */ | |
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; | |
249 | } else { | |
250 | phydev->priv = NULL; | |
251 | } | |
252 | return 0; | |
253 | } | |
254 | ||
255 | static int lxt973_config_aneg(struct phy_device *phydev) | |
256 | { | |
257 | /* Do nothing if port is in fiber mode. */ | |
258 | return phydev->priv ? 0 : genphy_config_aneg(phydev); | |
259 | } | |
260 | ||
d5bf9071 CH |
261 | static struct phy_driver lxt97x_driver[] = { |
262 | { | |
600991b0 | 263 | .phy_id = 0x78100000, |
00db8189 | 264 | .name = "LXT970", |
600991b0 | 265 | .phy_id_mask = 0xfffffff0, |
00db8189 AF |
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, | |
d5bf9071 | 273 | }, { |
600991b0 | 274 | .phy_id = 0x001378e0, |
00db8189 | 275 | .name = "LXT971", |
600991b0 | 276 | .phy_id_mask = 0xfffffff0, |
00db8189 AF |
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, | |
871d1d6b LC |
283 | }, { |
284 | .phy_id = 0x00137a10, | |
285 | .name = "LXT973-A2", | |
286 | .phy_id_mask = 0xffffffff, | |
287 | .features = PHY_BASIC_FEATURES, | |
288 | .flags = 0, | |
289 | .probe = lxt973_probe, | |
290 | .config_aneg = lxt973_config_aneg, | |
291 | .read_status = lxt973a2_read_status, | |
d5bf9071 | 292 | }, { |
e13647c1 RC |
293 | .phy_id = 0x00137a10, |
294 | .name = "LXT973", | |
295 | .phy_id_mask = 0xfffffff0, | |
296 | .features = PHY_BASIC_FEATURES, | |
297 | .flags = 0, | |
298 | .probe = lxt973_probe, | |
299 | .config_aneg = lxt973_config_aneg, | |
300 | .read_status = genphy_read_status, | |
d5bf9071 | 301 | } }; |
e13647c1 | 302 | |
50fd7150 | 303 | module_phy_driver(lxt97x_driver); |
4e4f10f6 | 304 | |
cf93c945 | 305 | static struct mdio_device_id __maybe_unused lxt_tbl[] = { |
4e4f10f6 DW |
306 | { 0x78100000, 0xfffffff0 }, |
307 | { 0x001378e0, 0xfffffff0 }, | |
e2f5b045 | 308 | { 0x00137a10, 0xfffffff0 }, |
4e4f10f6 DW |
309 | { } |
310 | }; | |
311 | ||
312 | MODULE_DEVICE_TABLE(mdio, lxt_tbl); |