Loading...
1/*
2 * Driver for Vitesse PHYs
3 *
4 * Author: Kriston Carson
5 *
6 * Copyright (c) 2005, 2009, 2011 Freescale Semiconductor, Inc.
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
12 *
13 */
14
15#include <linux/kernel.h>
16#include <linux/module.h>
17#include <linux/mii.h>
18#include <linux/ethtool.h>
19#include <linux/phy.h>
20
21/* Vitesse Extended Page Magic Register(s) */
22#define MII_VSC82X4_EXT_PAGE_16E 0x10
23#define MII_VSC82X4_EXT_PAGE_17E 0x11
24#define MII_VSC82X4_EXT_PAGE_18E 0x12
25
26/* Vitesse Extended Control Register 1 */
27#define MII_VSC8244_EXT_CON1 0x17
28#define MII_VSC8244_EXTCON1_INIT 0x0000
29#define MII_VSC8244_EXTCON1_TX_SKEW_MASK 0x0c00
30#define MII_VSC8244_EXTCON1_RX_SKEW_MASK 0x0300
31#define MII_VSC8244_EXTCON1_TX_SKEW 0x0800
32#define MII_VSC8244_EXTCON1_RX_SKEW 0x0200
33
34/* Vitesse Interrupt Mask Register */
35#define MII_VSC8244_IMASK 0x19
36#define MII_VSC8244_IMASK_IEN 0x8000
37#define MII_VSC8244_IMASK_SPEED 0x4000
38#define MII_VSC8244_IMASK_LINK 0x2000
39#define MII_VSC8244_IMASK_DUPLEX 0x1000
40#define MII_VSC8244_IMASK_MASK 0xf000
41
42#define MII_VSC8221_IMASK_MASK 0xa000
43
44/* Vitesse Interrupt Status Register */
45#define MII_VSC8244_ISTAT 0x1a
46#define MII_VSC8244_ISTAT_STATUS 0x8000
47#define MII_VSC8244_ISTAT_SPEED 0x4000
48#define MII_VSC8244_ISTAT_LINK 0x2000
49#define MII_VSC8244_ISTAT_DUPLEX 0x1000
50
51/* Vitesse Auxiliary Control/Status Register */
52#define MII_VSC8244_AUX_CONSTAT 0x1c
53#define MII_VSC8244_AUXCONSTAT_INIT 0x0000
54#define MII_VSC8244_AUXCONSTAT_DUPLEX 0x0020
55#define MII_VSC8244_AUXCONSTAT_SPEED 0x0018
56#define MII_VSC8244_AUXCONSTAT_GBIT 0x0010
57#define MII_VSC8244_AUXCONSTAT_100 0x0008
58
59#define MII_VSC8221_AUXCONSTAT_INIT 0x0004 /* need to set this bit? */
60#define MII_VSC8221_AUXCONSTAT_RESERVED 0x0004
61
62/* Vitesse Extended Page Access Register */
63#define MII_VSC82X4_EXT_PAGE_ACCESS 0x1f
64
65/* Vitesse VSC8601 Extended PHY Control Register 1 */
66#define MII_VSC8601_EPHY_CTL 0x17
67#define MII_VSC8601_EPHY_CTL_RGMII_SKEW (1 << 8)
68
69#define PHY_ID_VSC8234 0x000fc620
70#define PHY_ID_VSC8244 0x000fc6c0
71#define PHY_ID_VSC8514 0x00070670
72#define PHY_ID_VSC8572 0x000704d0
73#define PHY_ID_VSC8574 0x000704a0
74#define PHY_ID_VSC8601 0x00070420
75#define PHY_ID_VSC8662 0x00070660
76#define PHY_ID_VSC8221 0x000fc550
77#define PHY_ID_VSC8211 0x000fc4b0
78
79MODULE_DESCRIPTION("Vitesse PHY driver");
80MODULE_AUTHOR("Kriston Carson");
81MODULE_LICENSE("GPL");
82
83static int vsc824x_add_skew(struct phy_device *phydev)
84{
85 int err;
86 int extcon;
87
88 extcon = phy_read(phydev, MII_VSC8244_EXT_CON1);
89
90 if (extcon < 0)
91 return extcon;
92
93 extcon &= ~(MII_VSC8244_EXTCON1_TX_SKEW_MASK |
94 MII_VSC8244_EXTCON1_RX_SKEW_MASK);
95
96 extcon |= (MII_VSC8244_EXTCON1_TX_SKEW |
97 MII_VSC8244_EXTCON1_RX_SKEW);
98
99 err = phy_write(phydev, MII_VSC8244_EXT_CON1, extcon);
100
101 return err;
102}
103
104static int vsc824x_config_init(struct phy_device *phydev)
105{
106 int err;
107
108 err = phy_write(phydev, MII_VSC8244_AUX_CONSTAT,
109 MII_VSC8244_AUXCONSTAT_INIT);
110 if (err < 0)
111 return err;
112
113 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID)
114 err = vsc824x_add_skew(phydev);
115
116 return err;
117}
118
119/* This adds a skew for both TX and RX clocks, so the skew should only be
120 * applied to "rgmii-id" interfaces. It may not work as expected
121 * on "rgmii-txid", "rgmii-rxid" or "rgmii" interfaces. */
122static int vsc8601_add_skew(struct phy_device *phydev)
123{
124 int ret;
125
126 ret = phy_read(phydev, MII_VSC8601_EPHY_CTL);
127 if (ret < 0)
128 return ret;
129
130 ret |= MII_VSC8601_EPHY_CTL_RGMII_SKEW;
131 return phy_write(phydev, MII_VSC8601_EPHY_CTL, ret);
132}
133
134static int vsc8601_config_init(struct phy_device *phydev)
135{
136 int ret = 0;
137
138 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID)
139 ret = vsc8601_add_skew(phydev);
140
141 if (ret < 0)
142 return ret;
143
144 return genphy_config_init(phydev);
145}
146
147static int vsc824x_ack_interrupt(struct phy_device *phydev)
148{
149 int err = 0;
150
151 /* Don't bother to ACK the interrupts if interrupts
152 * are disabled. The 824x cannot clear the interrupts
153 * if they are disabled.
154 */
155 if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
156 err = phy_read(phydev, MII_VSC8244_ISTAT);
157
158 return (err < 0) ? err : 0;
159}
160
161static int vsc82xx_config_intr(struct phy_device *phydev)
162{
163 int err;
164
165 if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
166 err = phy_write(phydev, MII_VSC8244_IMASK,
167 (phydev->drv->phy_id == PHY_ID_VSC8234 ||
168 phydev->drv->phy_id == PHY_ID_VSC8244 ||
169 phydev->drv->phy_id == PHY_ID_VSC8514 ||
170 phydev->drv->phy_id == PHY_ID_VSC8572 ||
171 phydev->drv->phy_id == PHY_ID_VSC8574 ||
172 phydev->drv->phy_id == PHY_ID_VSC8601) ?
173 MII_VSC8244_IMASK_MASK :
174 MII_VSC8221_IMASK_MASK);
175 else {
176 /* The Vitesse PHY cannot clear the interrupt
177 * once it has disabled them, so we clear them first
178 */
179 err = phy_read(phydev, MII_VSC8244_ISTAT);
180
181 if (err < 0)
182 return err;
183
184 err = phy_write(phydev, MII_VSC8244_IMASK, 0);
185 }
186
187 return err;
188}
189
190static int vsc8221_config_init(struct phy_device *phydev)
191{
192 int err;
193
194 err = phy_write(phydev, MII_VSC8244_AUX_CONSTAT,
195 MII_VSC8221_AUXCONSTAT_INIT);
196 return err;
197
198 /* Perhaps we should set EXT_CON1 based on the interface?
199 * Options are 802.3Z SerDes or SGMII
200 */
201}
202
203/* vsc82x4_config_autocross_enable - Enable auto MDI/MDI-X for forced links
204 * @phydev: target phy_device struct
205 *
206 * Enable auto MDI/MDI-X when in 10/100 forced link speeds by writing
207 * special values in the VSC8234/VSC8244 extended reserved registers
208 */
209static int vsc82x4_config_autocross_enable(struct phy_device *phydev)
210{
211 int ret;
212
213 if (phydev->autoneg == AUTONEG_ENABLE || phydev->speed > SPEED_100)
214 return 0;
215
216 /* map extended registers set 0x10 - 0x1e */
217 ret = phy_write(phydev, MII_VSC82X4_EXT_PAGE_ACCESS, 0x52b5);
218 if (ret >= 0)
219 ret = phy_write(phydev, MII_VSC82X4_EXT_PAGE_18E, 0x0012);
220 if (ret >= 0)
221 ret = phy_write(phydev, MII_VSC82X4_EXT_PAGE_17E, 0x2803);
222 if (ret >= 0)
223 ret = phy_write(phydev, MII_VSC82X4_EXT_PAGE_16E, 0x87fa);
224 /* map standard registers set 0x10 - 0x1e */
225 if (ret >= 0)
226 ret = phy_write(phydev, MII_VSC82X4_EXT_PAGE_ACCESS, 0x0000);
227 else
228 phy_write(phydev, MII_VSC82X4_EXT_PAGE_ACCESS, 0x0000);
229
230 return ret;
231}
232
233/* vsc82x4_config_aneg - restart auto-negotiation or write BMCR
234 * @phydev: target phy_device struct
235 *
236 * Description: If auto-negotiation is enabled, we configure the
237 * advertising, and then restart auto-negotiation. If it is not
238 * enabled, then we write the BMCR and also start the auto
239 * MDI/MDI-X feature
240 */
241static int vsc82x4_config_aneg(struct phy_device *phydev)
242{
243 int ret;
244
245 /* Enable auto MDI/MDI-X when in 10/100 forced link speeds by
246 * writing special values in the VSC8234 extended reserved registers
247 */
248 if (phydev->autoneg != AUTONEG_ENABLE && phydev->speed <= SPEED_100) {
249 ret = genphy_setup_forced(phydev);
250
251 if (ret < 0) /* error */
252 return ret;
253
254 return vsc82x4_config_autocross_enable(phydev);
255 }
256
257 return genphy_config_aneg(phydev);
258}
259
260/* Vitesse 82xx */
261static struct phy_driver vsc82xx_driver[] = {
262{
263 .phy_id = PHY_ID_VSC8234,
264 .name = "Vitesse VSC8234",
265 .phy_id_mask = 0x000ffff0,
266 .features = PHY_GBIT_FEATURES,
267 .flags = PHY_HAS_INTERRUPT,
268 .config_init = &vsc824x_config_init,
269 .config_aneg = &vsc82x4_config_aneg,
270 .ack_interrupt = &vsc824x_ack_interrupt,
271 .config_intr = &vsc82xx_config_intr,
272}, {
273 .phy_id = PHY_ID_VSC8244,
274 .name = "Vitesse VSC8244",
275 .phy_id_mask = 0x000fffc0,
276 .features = PHY_GBIT_FEATURES,
277 .flags = PHY_HAS_INTERRUPT,
278 .config_init = &vsc824x_config_init,
279 .config_aneg = &vsc82x4_config_aneg,
280 .ack_interrupt = &vsc824x_ack_interrupt,
281 .config_intr = &vsc82xx_config_intr,
282}, {
283 .phy_id = PHY_ID_VSC8514,
284 .name = "Vitesse VSC8514",
285 .phy_id_mask = 0x000ffff0,
286 .features = PHY_GBIT_FEATURES,
287 .flags = PHY_HAS_INTERRUPT,
288 .config_init = &vsc824x_config_init,
289 .config_aneg = &vsc82x4_config_aneg,
290 .ack_interrupt = &vsc824x_ack_interrupt,
291 .config_intr = &vsc82xx_config_intr,
292}, {
293 .phy_id = PHY_ID_VSC8572,
294 .name = "Vitesse VSC8572",
295 .phy_id_mask = 0x000ffff0,
296 .features = PHY_GBIT_FEATURES,
297 .flags = PHY_HAS_INTERRUPT,
298 .config_init = &vsc824x_config_init,
299 .config_aneg = &vsc82x4_config_aneg,
300 .ack_interrupt = &vsc824x_ack_interrupt,
301 .config_intr = &vsc82xx_config_intr,
302}, {
303 .phy_id = PHY_ID_VSC8574,
304 .name = "Vitesse VSC8574",
305 .phy_id_mask = 0x000ffff0,
306 .features = PHY_GBIT_FEATURES,
307 .flags = PHY_HAS_INTERRUPT,
308 .config_init = &vsc824x_config_init,
309 .config_aneg = &vsc82x4_config_aneg,
310 .ack_interrupt = &vsc824x_ack_interrupt,
311 .config_intr = &vsc82xx_config_intr,
312}, {
313 .phy_id = PHY_ID_VSC8601,
314 .name = "Vitesse VSC8601",
315 .phy_id_mask = 0x000ffff0,
316 .features = PHY_GBIT_FEATURES,
317 .flags = PHY_HAS_INTERRUPT,
318 .config_init = &vsc8601_config_init,
319 .ack_interrupt = &vsc824x_ack_interrupt,
320 .config_intr = &vsc82xx_config_intr,
321}, {
322 .phy_id = PHY_ID_VSC8662,
323 .name = "Vitesse VSC8662",
324 .phy_id_mask = 0x000ffff0,
325 .features = PHY_GBIT_FEATURES,
326 .flags = PHY_HAS_INTERRUPT,
327 .config_init = &vsc824x_config_init,
328 .config_aneg = &vsc82x4_config_aneg,
329 .ack_interrupt = &vsc824x_ack_interrupt,
330 .config_intr = &vsc82xx_config_intr,
331}, {
332 /* Vitesse 8221 */
333 .phy_id = PHY_ID_VSC8221,
334 .phy_id_mask = 0x000ffff0,
335 .name = "Vitesse VSC8221",
336 .features = PHY_GBIT_FEATURES,
337 .flags = PHY_HAS_INTERRUPT,
338 .config_init = &vsc8221_config_init,
339 .ack_interrupt = &vsc824x_ack_interrupt,
340 .config_intr = &vsc82xx_config_intr,
341}, {
342 /* Vitesse 8211 */
343 .phy_id = PHY_ID_VSC8211,
344 .phy_id_mask = 0x000ffff0,
345 .name = "Vitesse VSC8211",
346 .features = PHY_GBIT_FEATURES,
347 .flags = PHY_HAS_INTERRUPT,
348 .config_init = &vsc8221_config_init,
349 .ack_interrupt = &vsc824x_ack_interrupt,
350 .config_intr = &vsc82xx_config_intr,
351} };
352
353module_phy_driver(vsc82xx_driver);
354
355static struct mdio_device_id __maybe_unused vitesse_tbl[] = {
356 { PHY_ID_VSC8234, 0x000ffff0 },
357 { PHY_ID_VSC8244, 0x000fffc0 },
358 { PHY_ID_VSC8514, 0x000ffff0 },
359 { PHY_ID_VSC8572, 0x000ffff0 },
360 { PHY_ID_VSC8574, 0x000ffff0 },
361 { PHY_ID_VSC8662, 0x000ffff0 },
362 { PHY_ID_VSC8221, 0x000ffff0 },
363 { PHY_ID_VSC8211, 0x000ffff0 },
364 { }
365};
366
367MODULE_DEVICE_TABLE(mdio, vitesse_tbl);
1/*
2 * Driver for Vitesse PHYs
3 *
4 * Author: Kriston Carson
5 *
6 * Copyright (c) 2005, 2009 Freescale Semiconductor, Inc.
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
12 *
13 */
14
15#include <linux/kernel.h>
16#include <linux/module.h>
17#include <linux/mii.h>
18#include <linux/ethtool.h>
19#include <linux/phy.h>
20
21/* Vitesse Extended Control Register 1 */
22#define MII_VSC8244_EXT_CON1 0x17
23#define MII_VSC8244_EXTCON1_INIT 0x0000
24#define MII_VSC8244_EXTCON1_TX_SKEW_MASK 0x0c00
25#define MII_VSC8244_EXTCON1_RX_SKEW_MASK 0x0300
26#define MII_VSC8244_EXTCON1_TX_SKEW 0x0800
27#define MII_VSC8244_EXTCON1_RX_SKEW 0x0200
28
29/* Vitesse Interrupt Mask Register */
30#define MII_VSC8244_IMASK 0x19
31#define MII_VSC8244_IMASK_IEN 0x8000
32#define MII_VSC8244_IMASK_SPEED 0x4000
33#define MII_VSC8244_IMASK_LINK 0x2000
34#define MII_VSC8244_IMASK_DUPLEX 0x1000
35#define MII_VSC8244_IMASK_MASK 0xf000
36
37#define MII_VSC8221_IMASK_MASK 0xa000
38
39/* Vitesse Interrupt Status Register */
40#define MII_VSC8244_ISTAT 0x1a
41#define MII_VSC8244_ISTAT_STATUS 0x8000
42#define MII_VSC8244_ISTAT_SPEED 0x4000
43#define MII_VSC8244_ISTAT_LINK 0x2000
44#define MII_VSC8244_ISTAT_DUPLEX 0x1000
45
46/* Vitesse Auxiliary Control/Status Register */
47#define MII_VSC8244_AUX_CONSTAT 0x1c
48#define MII_VSC8244_AUXCONSTAT_INIT 0x0000
49#define MII_VSC8244_AUXCONSTAT_DUPLEX 0x0020
50#define MII_VSC8244_AUXCONSTAT_SPEED 0x0018
51#define MII_VSC8244_AUXCONSTAT_GBIT 0x0010
52#define MII_VSC8244_AUXCONSTAT_100 0x0008
53
54#define MII_VSC8221_AUXCONSTAT_INIT 0x0004 /* need to set this bit? */
55#define MII_VSC8221_AUXCONSTAT_RESERVED 0x0004
56
57#define PHY_ID_VSC8244 0x000fc6c0
58#define PHY_ID_VSC8221 0x000fc550
59
60MODULE_DESCRIPTION("Vitesse PHY driver");
61MODULE_AUTHOR("Kriston Carson");
62MODULE_LICENSE("GPL");
63
64int vsc824x_add_skew(struct phy_device *phydev)
65{
66 int err;
67 int extcon;
68
69 extcon = phy_read(phydev, MII_VSC8244_EXT_CON1);
70
71 if (extcon < 0)
72 return extcon;
73
74 extcon &= ~(MII_VSC8244_EXTCON1_TX_SKEW_MASK |
75 MII_VSC8244_EXTCON1_RX_SKEW_MASK);
76
77 extcon |= (MII_VSC8244_EXTCON1_TX_SKEW |
78 MII_VSC8244_EXTCON1_RX_SKEW);
79
80 err = phy_write(phydev, MII_VSC8244_EXT_CON1, extcon);
81
82 return err;
83}
84EXPORT_SYMBOL(vsc824x_add_skew);
85
86static int vsc824x_config_init(struct phy_device *phydev)
87{
88 int err;
89
90 err = phy_write(phydev, MII_VSC8244_AUX_CONSTAT,
91 MII_VSC8244_AUXCONSTAT_INIT);
92 if (err < 0)
93 return err;
94
95 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID)
96 err = vsc824x_add_skew(phydev);
97
98 return err;
99}
100
101static int vsc824x_ack_interrupt(struct phy_device *phydev)
102{
103 int err = 0;
104
105 /*
106 * Don't bother to ACK the interrupts if interrupts
107 * are disabled. The 824x cannot clear the interrupts
108 * if they are disabled.
109 */
110 if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
111 err = phy_read(phydev, MII_VSC8244_ISTAT);
112
113 return (err < 0) ? err : 0;
114}
115
116static int vsc82xx_config_intr(struct phy_device *phydev)
117{
118 int err;
119
120 if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
121 err = phy_write(phydev, MII_VSC8244_IMASK,
122 phydev->drv->phy_id == PHY_ID_VSC8244 ?
123 MII_VSC8244_IMASK_MASK :
124 MII_VSC8221_IMASK_MASK);
125 else {
126 /*
127 * The Vitesse PHY cannot clear the interrupt
128 * once it has disabled them, so we clear them first
129 */
130 err = phy_read(phydev, MII_VSC8244_ISTAT);
131
132 if (err < 0)
133 return err;
134
135 err = phy_write(phydev, MII_VSC8244_IMASK, 0);
136 }
137
138 return err;
139}
140
141/* Vitesse 824x */
142static struct phy_driver vsc8244_driver = {
143 .phy_id = PHY_ID_VSC8244,
144 .name = "Vitesse VSC8244",
145 .phy_id_mask = 0x000fffc0,
146 .features = PHY_GBIT_FEATURES,
147 .flags = PHY_HAS_INTERRUPT,
148 .config_init = &vsc824x_config_init,
149 .config_aneg = &genphy_config_aneg,
150 .read_status = &genphy_read_status,
151 .ack_interrupt = &vsc824x_ack_interrupt,
152 .config_intr = &vsc82xx_config_intr,
153 .driver = { .owner = THIS_MODULE,},
154};
155
156static int vsc8221_config_init(struct phy_device *phydev)
157{
158 int err;
159
160 err = phy_write(phydev, MII_VSC8244_AUX_CONSTAT,
161 MII_VSC8221_AUXCONSTAT_INIT);
162 return err;
163
164 /* Perhaps we should set EXT_CON1 based on the interface?
165 Options are 802.3Z SerDes or SGMII */
166}
167
168/* Vitesse 8221 */
169static struct phy_driver vsc8221_driver = {
170 .phy_id = PHY_ID_VSC8221,
171 .phy_id_mask = 0x000ffff0,
172 .name = "Vitesse VSC8221",
173 .features = PHY_GBIT_FEATURES,
174 .flags = PHY_HAS_INTERRUPT,
175 .config_init = &vsc8221_config_init,
176 .config_aneg = &genphy_config_aneg,
177 .read_status = &genphy_read_status,
178 .ack_interrupt = &vsc824x_ack_interrupt,
179 .config_intr = &vsc82xx_config_intr,
180 .driver = { .owner = THIS_MODULE,},
181};
182
183static int __init vsc82xx_init(void)
184{
185 int err;
186
187 err = phy_driver_register(&vsc8244_driver);
188 if (err < 0)
189 return err;
190 err = phy_driver_register(&vsc8221_driver);
191 if (err < 0)
192 phy_driver_unregister(&vsc8244_driver);
193 return err;
194}
195
196static void __exit vsc82xx_exit(void)
197{
198 phy_driver_unregister(&vsc8244_driver);
199 phy_driver_unregister(&vsc8221_driver);
200}
201
202module_init(vsc82xx_init);
203module_exit(vsc82xx_exit);
204
205static struct mdio_device_id __maybe_unused vitesse_tbl[] = {
206 { PHY_ID_VSC8244, 0x000fffc0 },
207 { PHY_ID_VSC8221, 0x000ffff0 },
208 { }
209};
210
211MODULE_DEVICE_TABLE(mdio, vitesse_tbl);