Merge tag 'gfs2-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/steve...
[linux-2.6-block.git] / drivers / net / phy / vitesse.c
CommitLineData
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1/*
2 * Driver for Vitesse PHYs
3 *
4 * Author: Kriston Carson
5 *
3fb69bca 6 * Copyright (c) 2005, 2009, 2011 Freescale Semiconductor, Inc.
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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
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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
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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
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26/* Vitesse Extended Control Register 1 */
27#define MII_VSC8244_EXT_CON1 0x17
28#define MII_VSC8244_EXTCON1_INIT 0x0000
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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
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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
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42#define MII_VSC8221_IMASK_MASK 0xa000
43
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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 */
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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
ef82a306 58
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59#define MII_VSC8221_AUXCONSTAT_INIT 0x0004 /* need to set this bit? */
60#define MII_VSC8221_AUXCONSTAT_RESERVED 0x0004
61
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62/* Vitesse Extended Page Access Register */
63#define MII_VSC82X4_EXT_PAGE_ACCESS 0x1f
64
0508019c 65#define PHY_ID_VSC8234 0x000fc620
11c6dd2c 66#define PHY_ID_VSC8244 0x000fc6c0
167f76a8 67#define PHY_ID_VSC8514 0x00070670
c2efef74 68#define PHY_ID_VSC8574 0x000704a0
06ae4f84 69#define PHY_ID_VSC8662 0x00070660
11c6dd2c 70#define PHY_ID_VSC8221 0x000fc550
5a1cebd8 71#define PHY_ID_VSC8211 0x000fc4b0
11c6dd2c 72
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73MODULE_DESCRIPTION("Vitesse PHY driver");
74MODULE_AUTHOR("Kriston Carson");
75MODULE_LICENSE("GPL");
76
baec126c 77static int vsc824x_add_skew(struct phy_device *phydev)
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78{
79 int err;
fddf86fc 80 int extcon;
ef82a306 81
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82 extcon = phy_read(phydev, MII_VSC8244_EXT_CON1);
83
84 if (extcon < 0)
fddf86fc 85 return extcon;
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86
87 extcon &= ~(MII_VSC8244_EXTCON1_TX_SKEW_MASK |
88 MII_VSC8244_EXTCON1_RX_SKEW_MASK);
89
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90 extcon |= (MII_VSC8244_EXTCON1_TX_SKEW |
91 MII_VSC8244_EXTCON1_RX_SKEW);
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92
93 err = phy_write(phydev, MII_VSC8244_EXT_CON1, extcon);
94
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95 return err;
96}
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97
98static int vsc824x_config_init(struct phy_device *phydev)
99{
100 int err;
101
102 err = phy_write(phydev, MII_VSC8244_AUX_CONSTAT,
103 MII_VSC8244_AUXCONSTAT_INIT);
104 if (err < 0)
105 return err;
106
107 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID)
108 err = vsc824x_add_skew(phydev);
109
110 return err;
111}
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112
113static int vsc824x_ack_interrupt(struct phy_device *phydev)
114{
1d5e83aa 115 int err = 0;
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116
117 /* Don't bother to ACK the interrupts if interrupts
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118 * are disabled. The 824x cannot clear the interrupts
119 * if they are disabled.
120 */
121 if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
122 err = phy_read(phydev, MII_VSC8244_ISTAT);
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123
124 return (err < 0) ? err : 0;
125}
126
11c6dd2c 127static int vsc82xx_config_intr(struct phy_device *phydev)
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128{
129 int err;
130
131 if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
132 err = phy_write(phydev, MII_VSC8244_IMASK,
0508019c 133 (phydev->drv->phy_id == PHY_ID_VSC8234 ||
c2efef74 134 phydev->drv->phy_id == PHY_ID_VSC8244 ||
167f76a8 135 phydev->drv->phy_id == PHY_ID_VSC8514 ||
c2efef74 136 phydev->drv->phy_id == PHY_ID_VSC8574) ?
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137 MII_VSC8244_IMASK_MASK :
138 MII_VSC8221_IMASK_MASK);
1d5e83aa 139 else {
2a8626d1 140 /* The Vitesse PHY cannot clear the interrupt
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141 * once it has disabled them, so we clear them first
142 */
143 err = phy_read(phydev, MII_VSC8244_ISTAT);
144
52cb1c2b 145 if (err < 0)
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146 return err;
147
ef82a306 148 err = phy_write(phydev, MII_VSC8244_IMASK, 0);
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149 }
150
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151 return err;
152}
153
11c6dd2c 154static int vsc8221_config_init(struct phy_device *phydev)
ef82a306 155{
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156 int err;
157
158 err = phy_write(phydev, MII_VSC8244_AUX_CONSTAT,
159 MII_VSC8221_AUXCONSTAT_INIT);
160 return err;
161
162 /* Perhaps we should set EXT_CON1 based on the interface?
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163 * Options are 802.3Z SerDes or SGMII
164 */
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165}
166
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167/* vsc82x4_config_autocross_enable - Enable auto MDI/MDI-X for forced links
168 * @phydev: target phy_device struct
169 *
170 * Enable auto MDI/MDI-X when in 10/100 forced link speeds by writing
171 * special values in the VSC8234/VSC8244 extended reserved registers
172 */
173static int vsc82x4_config_autocross_enable(struct phy_device *phydev)
174{
175 int ret;
176
177 if (phydev->autoneg == AUTONEG_ENABLE || phydev->speed > SPEED_100)
178 return 0;
179
180 /* map extended registers set 0x10 - 0x1e */
181 ret = phy_write(phydev, MII_VSC82X4_EXT_PAGE_ACCESS, 0x52b5);
182 if (ret >= 0)
183 ret = phy_write(phydev, MII_VSC82X4_EXT_PAGE_18E, 0x0012);
184 if (ret >= 0)
185 ret = phy_write(phydev, MII_VSC82X4_EXT_PAGE_17E, 0x2803);
186 if (ret >= 0)
187 ret = phy_write(phydev, MII_VSC82X4_EXT_PAGE_16E, 0x87fa);
188 /* map standard registers set 0x10 - 0x1e */
189 if (ret >= 0)
190 ret = phy_write(phydev, MII_VSC82X4_EXT_PAGE_ACCESS, 0x0000);
191 else
192 phy_write(phydev, MII_VSC82X4_EXT_PAGE_ACCESS, 0x0000);
193
194 return ret;
195}
196
197/* vsc82x4_config_aneg - restart auto-negotiation or write BMCR
198 * @phydev: target phy_device struct
199 *
200 * Description: If auto-negotiation is enabled, we configure the
201 * advertising, and then restart auto-negotiation. If it is not
202 * enabled, then we write the BMCR and also start the auto
203 * MDI/MDI-X feature
204 */
205static int vsc82x4_config_aneg(struct phy_device *phydev)
206{
207 int ret;
208
209 /* Enable auto MDI/MDI-X when in 10/100 forced link speeds by
210 * writing special values in the VSC8234 extended reserved registers
211 */
212 if (phydev->autoneg != AUTONEG_ENABLE && phydev->speed <= SPEED_100) {
213 ret = genphy_setup_forced(phydev);
214
215 if (ret < 0) /* error */
216 return ret;
217
218 return vsc82x4_config_autocross_enable(phydev);
219 }
220
221 return genphy_config_aneg(phydev);
222}
223
0508019c 224/* Vitesse 82xx */
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225static struct phy_driver vsc82xx_driver[] = {
226{
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227 .phy_id = PHY_ID_VSC8234,
228 .name = "Vitesse VSC8234",
229 .phy_id_mask = 0x000ffff0,
230 .features = PHY_GBIT_FEATURES,
231 .flags = PHY_HAS_INTERRUPT,
232 .config_init = &vsc824x_config_init,
3fb69bca 233 .config_aneg = &vsc82x4_config_aneg,
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234 .read_status = &genphy_read_status,
235 .ack_interrupt = &vsc824x_ack_interrupt,
236 .config_intr = &vsc82xx_config_intr,
237 .driver = { .owner = THIS_MODULE,},
238}, {
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239 .phy_id = PHY_ID_VSC8244,
240 .name = "Vitesse VSC8244",
241 .phy_id_mask = 0x000fffc0,
242 .features = PHY_GBIT_FEATURES,
243 .flags = PHY_HAS_INTERRUPT,
244 .config_init = &vsc824x_config_init,
3fb69bca 245 .config_aneg = &vsc82x4_config_aneg,
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246 .read_status = &genphy_read_status,
247 .ack_interrupt = &vsc824x_ack_interrupt,
248 .config_intr = &vsc82xx_config_intr,
249 .driver = { .owner = THIS_MODULE,},
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250}, {
251 .phy_id = PHY_ID_VSC8514,
252 .name = "Vitesse VSC8514",
253 .phy_id_mask = 0x000ffff0,
254 .features = PHY_GBIT_FEATURES,
255 .flags = PHY_HAS_INTERRUPT,
256 .config_init = &vsc824x_config_init,
257 .config_aneg = &vsc82x4_config_aneg,
258 .read_status = &genphy_read_status,
259 .ack_interrupt = &vsc824x_ack_interrupt,
260 .config_intr = &vsc82xx_config_intr,
261 .driver = { .owner = THIS_MODULE,},
c2efef74 262}, {
263 .phy_id = PHY_ID_VSC8574,
264 .name = "Vitesse VSC8574",
265 .phy_id_mask = 0x000ffff0,
266 .features = PHY_GBIT_FEATURES,
267 .flags = PHY_HAS_INTERRUPT,
268 .config_init = &vsc824x_config_init,
3fb69bca 269 .config_aneg = &vsc82x4_config_aneg,
c2efef74 270 .read_status = &genphy_read_status,
271 .ack_interrupt = &vsc824x_ack_interrupt,
272 .config_intr = &vsc82xx_config_intr,
273 .driver = { .owner = THIS_MODULE,},
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274}, {
275 .phy_id = PHY_ID_VSC8662,
276 .name = "Vitesse VSC8662",
277 .phy_id_mask = 0x000ffff0,
278 .features = PHY_GBIT_FEATURES,
279 .flags = PHY_HAS_INTERRUPT,
280 .config_init = &vsc824x_config_init,
3fb69bca 281 .config_aneg = &vsc82x4_config_aneg,
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282 .read_status = &genphy_read_status,
283 .ack_interrupt = &vsc824x_ack_interrupt,
284 .config_intr = &vsc82xx_config_intr,
285 .driver = { .owner = THIS_MODULE,},
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286}, {
287 /* Vitesse 8221 */
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288 .phy_id = PHY_ID_VSC8221,
289 .phy_id_mask = 0x000ffff0,
290 .name = "Vitesse VSC8221",
291 .features = PHY_GBIT_FEATURES,
292 .flags = PHY_HAS_INTERRUPT,
293 .config_init = &vsc8221_config_init,
294 .config_aneg = &genphy_config_aneg,
295 .read_status = &genphy_read_status,
296 .ack_interrupt = &vsc824x_ack_interrupt,
297 .config_intr = &vsc82xx_config_intr,
d5bf9071 298 .driver = { .owner = THIS_MODULE,},
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299}, {
300 /* Vitesse 8211 */
301 .phy_id = PHY_ID_VSC8211,
302 .phy_id_mask = 0x000ffff0,
303 .name = "Vitesse VSC8211",
304 .features = PHY_GBIT_FEATURES,
305 .flags = PHY_HAS_INTERRUPT,
306 .config_init = &vsc8221_config_init,
307 .config_aneg = &genphy_config_aneg,
308 .read_status = &genphy_read_status,
309 .ack_interrupt = &vsc824x_ack_interrupt,
310 .config_intr = &vsc82xx_config_intr,
311 .driver = { .owner = THIS_MODULE,},
d5bf9071 312} };
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TP
313
314static int __init vsc82xx_init(void)
315{
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316 return phy_drivers_register(vsc82xx_driver,
317 ARRAY_SIZE(vsc82xx_driver));
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318}
319
11c6dd2c 320static void __exit vsc82xx_exit(void)
ef82a306 321{
2ebb1582 322 phy_drivers_unregister(vsc82xx_driver, ARRAY_SIZE(vsc82xx_driver));
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323}
324
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TP
325module_init(vsc82xx_init);
326module_exit(vsc82xx_exit);
4e4f10f6 327
cf93c945 328static struct mdio_device_id __maybe_unused vitesse_tbl[] = {
0508019c 329 { PHY_ID_VSC8234, 0x000ffff0 },
4e4f10f6 330 { PHY_ID_VSC8244, 0x000fffc0 },
167f76a8 331 { PHY_ID_VSC8514, 0x000ffff0 },
c2efef74 332 { PHY_ID_VSC8574, 0x000ffff0 },
06ae4f84 333 { PHY_ID_VSC8662, 0x000ffff0 },
4e4f10f6 334 { PHY_ID_VSC8221, 0x000ffff0 },
5a1cebd8 335 { PHY_ID_VSC8211, 0x000ffff0 },
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DW
336 { }
337};
338
339MODULE_DEVICE_TABLE(mdio, vitesse_tbl);