1 /*
2 * Copyright (c) 2005-2008 Chelsio, Inc. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 */
32 #include "common.h"
33
34 /* VSC8211 PHY specific registers. */
35 enum {
36 VSC8211_SIGDET_CTRL = 19,
37 VSC8211_EXT_CTRL = 23,
38 VSC8211_INTR_ENABLE = 25,
39 VSC8211_INTR_STATUS = 26,
40 VSC8211_LED_CTRL = 27,
41 VSC8211_AUX_CTRL_STAT = 28,
42 VSC8211_EXT_PAGE_AXS = 31,
43 };
44
45 enum {
46 VSC_INTR_RX_ERR = 1 << 0,
47 VSC_INTR_MS_ERR = 1 << 1, /* master/slave resolution error */
48 VSC_INTR_CABLE = 1 << 2, /* cable impairment */
49 VSC_INTR_FALSE_CARR = 1 << 3, /* false carrier */
50 VSC_INTR_MEDIA_CHG = 1 << 4, /* AMS media change */
51 VSC_INTR_RX_FIFO = 1 << 5, /* Rx FIFO over/underflow */
52 VSC_INTR_TX_FIFO = 1 << 6, /* Tx FIFO over/underflow */
53 VSC_INTR_DESCRAMBL = 1 << 7, /* descrambler lock-lost */
54 VSC_INTR_SYMBOL_ERR = 1 << 8, /* symbol error */
55 VSC_INTR_NEG_DONE = 1 << 10, /* autoneg done */
56 VSC_INTR_NEG_ERR = 1 << 11, /* autoneg error */
57 VSC_INTR_DPLX_CHG = 1 << 12, /* duplex change */
58 VSC_INTR_LINK_CHG = 1 << 13, /* link change */
59 VSC_INTR_SPD_CHG = 1 << 14, /* speed change */
60 VSC_INTR_ENABLE = 1 << 15, /* interrupt enable */
61 };
62
63 enum {
64 VSC_CTRL_CLAUSE37_VIEW = 1 << 4, /* Switch to Clause 37 view */
65 VSC_CTRL_MEDIA_MODE_HI = 0xf000 /* High part of media mode select */
66 };
67
68 #define CFG_CHG_INTR_MASK (VSC_INTR_LINK_CHG | VSC_INTR_NEG_ERR | \
69 VSC_INTR_DPLX_CHG | VSC_INTR_SPD_CHG | \
70 VSC_INTR_NEG_DONE)
71 #define INTR_MASK (CFG_CHG_INTR_MASK | VSC_INTR_TX_FIFO | VSC_INTR_RX_FIFO | \
72 VSC_INTR_ENABLE)
73
74 /* PHY specific auxiliary control & status register fields */
75 #define S_ACSR_ACTIPHY_TMR 0
76 #define M_ACSR_ACTIPHY_TMR 0x3
77 #define V_ACSR_ACTIPHY_TMR(x) ((x) << S_ACSR_ACTIPHY_TMR)
78
79 #define S_ACSR_SPEED 3
80 #define M_ACSR_SPEED 0x3
81 #define G_ACSR_SPEED(x) (((x) >> S_ACSR_SPEED) & M_ACSR_SPEED)
82
83 #define S_ACSR_DUPLEX 5
84 #define F_ACSR_DUPLEX (1 << S_ACSR_DUPLEX)
85
86 #define S_ACSR_ACTIPHY 6
87 #define F_ACSR_ACTIPHY (1 << S_ACSR_ACTIPHY)
88
89 /*
90 * Reset the PHY. This PHY completes reset immediately so we never wait.
91 */
vsc8211_reset(struct cphy * cphy,int wait)92 static int vsc8211_reset(struct cphy *cphy, int wait)
93 {
94 return t3_phy_reset(cphy, MDIO_DEVAD_NONE, 0);
95 }
96
vsc8211_intr_enable(struct cphy * cphy)97 static int vsc8211_intr_enable(struct cphy *cphy)
98 {
99 return t3_mdio_write(cphy, MDIO_DEVAD_NONE, VSC8211_INTR_ENABLE,
100 INTR_MASK);
101 }
102
vsc8211_intr_disable(struct cphy * cphy)103 static int vsc8211_intr_disable(struct cphy *cphy)
104 {
105 return t3_mdio_write(cphy, MDIO_DEVAD_NONE, VSC8211_INTR_ENABLE, 0);
106 }
107
vsc8211_intr_clear(struct cphy * cphy)108 static int vsc8211_intr_clear(struct cphy *cphy)
109 {
110 u32 val;
111
112 /* Clear PHY interrupts by reading the register. */
113 return t3_mdio_read(cphy, MDIO_DEVAD_NONE, VSC8211_INTR_STATUS, &val);
114 }
115
vsc8211_autoneg_enable(struct cphy * cphy)116 static int vsc8211_autoneg_enable(struct cphy *cphy)
117 {
118 return t3_mdio_change_bits(cphy, MDIO_DEVAD_NONE, MII_BMCR,
119 BMCR_PDOWN | BMCR_ISOLATE,
120 BMCR_ANENABLE | BMCR_ANRESTART);
121 }
122
vsc8211_autoneg_restart(struct cphy * cphy)123 static int vsc8211_autoneg_restart(struct cphy *cphy)
124 {
125 return t3_mdio_change_bits(cphy, MDIO_DEVAD_NONE, MII_BMCR,
126 BMCR_PDOWN | BMCR_ISOLATE,
127 BMCR_ANRESTART);
128 }
129
vsc8211_get_link_status(struct cphy * cphy,int * link_ok,int * speed,int * duplex,int * fc)130 static int vsc8211_get_link_status(struct cphy *cphy, int *link_ok,
131 int *speed, int *duplex, int *fc)
132 {
133 unsigned int bmcr, status, lpa, adv;
134 int err, sp = -1, dplx = -1, pause = 0;
135
136 err = t3_mdio_read(cphy, MDIO_DEVAD_NONE, MII_BMCR, &bmcr);
137 if (!err)
138 err = t3_mdio_read(cphy, MDIO_DEVAD_NONE, MII_BMSR, &status);
139 if (err)
140 return err;
141
142 if (link_ok) {
143 /*
144 * BMSR_LSTATUS is latch-low, so if it is 0 we need to read it
145 * once more to get the current link state.
146 */
147 if (!(status & BMSR_LSTATUS))
148 err = t3_mdio_read(cphy, MDIO_DEVAD_NONE, MII_BMSR,
149 &status);
150 if (err)
151 return err;
152 *link_ok = (status & BMSR_LSTATUS) != 0;
153 }
154 if (!(bmcr & BMCR_ANENABLE)) {
155 dplx = (bmcr & BMCR_FULLDPLX) ? DUPLEX_FULL : DUPLEX_HALF;
156 if (bmcr & BMCR_SPEED1000)
157 sp = SPEED_1000;
158 else if (bmcr & BMCR_SPEED100)
159 sp = SPEED_100;
160 else
161 sp = SPEED_10;
162 } else if (status & BMSR_ANEGCOMPLETE) {
163 err = t3_mdio_read(cphy, MDIO_DEVAD_NONE, VSC8211_AUX_CTRL_STAT,
164 &status);
165 if (err)
166 return err;
167
168 dplx = (status & F_ACSR_DUPLEX) ? DUPLEX_FULL : DUPLEX_HALF;
169 sp = G_ACSR_SPEED(status);
170 if (sp == 0)
171 sp = SPEED_10;
172 else if (sp == 1)
173 sp = SPEED_100;
174 else
175 sp = SPEED_1000;
176
177 if (fc && dplx == DUPLEX_FULL) {
178 err = t3_mdio_read(cphy, MDIO_DEVAD_NONE, MII_LPA,
179 &lpa);
180 if (!err)
181 err = t3_mdio_read(cphy, MDIO_DEVAD_NONE,
182 MII_ADVERTISE, &adv);
183 if (err)
184 return err;
185
186 if (lpa & adv & ADVERTISE_PAUSE_CAP)
187 pause = PAUSE_RX | PAUSE_TX;
188 else if ((lpa & ADVERTISE_PAUSE_CAP) &&
189 (lpa & ADVERTISE_PAUSE_ASYM) &&
190 (adv & ADVERTISE_PAUSE_ASYM))
191 pause = PAUSE_TX;
192 else if ((lpa & ADVERTISE_PAUSE_ASYM) &&
193 (adv & ADVERTISE_PAUSE_CAP))
194 pause = PAUSE_RX;
195 }
196 }
197 if (speed)
198 *speed = sp;
199 if (duplex)
200 *duplex = dplx;
201 if (fc)
202 *fc = pause;
203 return 0;
204 }
205
vsc8211_get_link_status_fiber(struct cphy * cphy,int * link_ok,int * speed,int * duplex,int * fc)206 static int vsc8211_get_link_status_fiber(struct cphy *cphy, int *link_ok,
207 int *speed, int *duplex, int *fc)
208 {
209 unsigned int bmcr, status, lpa, adv;
210 int err, sp = -1, dplx = -1, pause = 0;
211
212 err = t3_mdio_read(cphy, MDIO_DEVAD_NONE, MII_BMCR, &bmcr);
213 if (!err)
214 err = t3_mdio_read(cphy, MDIO_DEVAD_NONE, MII_BMSR, &status);
215 if (err)
216 return err;
217
218 if (link_ok) {
219 /*
220 * BMSR_LSTATUS is latch-low, so if it is 0 we need to read it
221 * once more to get the current link state.
222 */
223 if (!(status & BMSR_LSTATUS))
224 err = t3_mdio_read(cphy, MDIO_DEVAD_NONE, MII_BMSR,
225 &status);
226 if (err)
227 return err;
228 *link_ok = (status & BMSR_LSTATUS) != 0;
229 }
230 if (!(bmcr & BMCR_ANENABLE)) {
231 dplx = (bmcr & BMCR_FULLDPLX) ? DUPLEX_FULL : DUPLEX_HALF;
232 if (bmcr & BMCR_SPEED1000)
233 sp = SPEED_1000;
234 else if (bmcr & BMCR_SPEED100)
235 sp = SPEED_100;
236 else
237 sp = SPEED_10;
238 } else if (status & BMSR_ANEGCOMPLETE) {
239 err = t3_mdio_read(cphy, MDIO_DEVAD_NONE, MII_LPA, &lpa);
240 if (!err)
241 err = t3_mdio_read(cphy, MDIO_DEVAD_NONE, MII_ADVERTISE,
242 &adv);
243 if (err)
244 return err;
245
246 if (adv & lpa & ADVERTISE_1000XFULL) {
247 dplx = DUPLEX_FULL;
248 sp = SPEED_1000;
249 } else if (adv & lpa & ADVERTISE_1000XHALF) {
250 dplx = DUPLEX_HALF;
251 sp = SPEED_1000;
252 }
253
254 if (fc && dplx == DUPLEX_FULL) {
255 if (lpa & adv & ADVERTISE_1000XPAUSE)
256 pause = PAUSE_RX | PAUSE_TX;
257 else if ((lpa & ADVERTISE_1000XPAUSE) &&
258 (adv & lpa & ADVERTISE_1000XPSE_ASYM))
259 pause = PAUSE_TX;
260 else if ((lpa & ADVERTISE_1000XPSE_ASYM) &&
261 (adv & ADVERTISE_1000XPAUSE))
262 pause = PAUSE_RX;
263 }
264 }
265 if (speed)
266 *speed = sp;
267 if (duplex)
268 *duplex = dplx;
269 if (fc)
270 *fc = pause;
271 return 0;
272 }
273
274 #ifdef UNUSED
275 /*
276 * Enable/disable auto MDI/MDI-X in forced link speed mode.
277 */
vsc8211_set_automdi(struct cphy * phy,int enable)278 static int vsc8211_set_automdi(struct cphy *phy, int enable)
279 {
280 int err;
281
282 err = t3_mdio_write(phy, MDIO_DEVAD_NONE, VSC8211_EXT_PAGE_AXS, 0x52b5);
283 if (err)
284 return err;
285
286 err = t3_mdio_write(phy, MDIO_DEVAD_NONE, 18, 0x12);
287 if (err)
288 return err;
289
290 err = t3_mdio_write(phy, MDIO_DEVAD_NONE, 17, enable ? 0x2803 : 0x3003);
291 if (err)
292 return err;
293
294 err = t3_mdio_write(phy, MDIO_DEVAD_NONE, 16, 0x87fa);
295 if (err)
296 return err;
297
298 err = t3_mdio_write(phy, MDIO_DEVAD_NONE, VSC8211_EXT_PAGE_AXS, 0);
299 if (err)
300 return err;
301
302 return 0;
303 }
304
vsc8211_set_speed_duplex(struct cphy * phy,int speed,int duplex)305 int vsc8211_set_speed_duplex(struct cphy *phy, int speed, int duplex)
306 {
307 int err;
308
309 err = t3_set_phy_speed_duplex(phy, speed, duplex);
310 if (!err)
311 err = vsc8211_set_automdi(phy, 1);
312 return err;
313 }
314 #endif /* UNUSED */
315
vsc8211_power_down(struct cphy * cphy,int enable)316 static int vsc8211_power_down(struct cphy *cphy, int enable)
317 {
318 return t3_mdio_change_bits(cphy, 0, MII_BMCR, BMCR_PDOWN,
319 enable ? BMCR_PDOWN : 0);
320 }
321
vsc8211_intr_handler(struct cphy * cphy)322 static int vsc8211_intr_handler(struct cphy *cphy)
323 {
324 unsigned int cause;
325 int err, cphy_cause = 0;
326
327 err = t3_mdio_read(cphy, MDIO_DEVAD_NONE, VSC8211_INTR_STATUS, &cause);
328 if (err)
329 return err;
330
331 cause &= INTR_MASK;
332 if (cause & CFG_CHG_INTR_MASK)
333 cphy_cause |= cphy_cause_link_change;
334 if (cause & (VSC_INTR_RX_FIFO | VSC_INTR_TX_FIFO))
335 cphy_cause |= cphy_cause_fifo_error;
336 return cphy_cause;
337 }
338
339 static const struct cphy_ops vsc8211_ops = {
340 .reset = vsc8211_reset,
341 .intr_enable = vsc8211_intr_enable,
342 .intr_disable = vsc8211_intr_disable,
343 .intr_clear = vsc8211_intr_clear,
344 .intr_handler = vsc8211_intr_handler,
345 .autoneg_enable = vsc8211_autoneg_enable,
346 .autoneg_restart = vsc8211_autoneg_restart,
347 .advertise = t3_phy_advertise,
348 .set_speed_duplex = t3_set_phy_speed_duplex,
349 .get_link_status = vsc8211_get_link_status,
350 .power_down = vsc8211_power_down,
351 };
352
353 static const struct cphy_ops vsc8211_fiber_ops = {
354 .reset = vsc8211_reset,
355 .intr_enable = vsc8211_intr_enable,
356 .intr_disable = vsc8211_intr_disable,
357 .intr_clear = vsc8211_intr_clear,
358 .intr_handler = vsc8211_intr_handler,
359 .autoneg_enable = vsc8211_autoneg_enable,
360 .autoneg_restart = vsc8211_autoneg_restart,
361 .advertise = t3_phy_advertise_fiber,
362 .set_speed_duplex = t3_set_phy_speed_duplex,
363 .get_link_status = vsc8211_get_link_status_fiber,
364 .power_down = vsc8211_power_down,
365 };
366
t3_vsc8211_phy_prep(struct cphy * phy,struct adapter * adapter,int phy_addr,const struct mdio_ops * mdio_ops)367 int t3_vsc8211_phy_prep(struct cphy *phy, struct adapter *adapter,
368 int phy_addr, const struct mdio_ops *mdio_ops)
369 {
370 int err;
371 unsigned int val;
372
373 cphy_init(phy, adapter, phy_addr, &vsc8211_ops, mdio_ops,
374 SUPPORTED_10baseT_Full | SUPPORTED_100baseT_Full |
375 SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_MII |
376 SUPPORTED_TP | SUPPORTED_IRQ, "10/100/1000BASE-T");
377 msleep(20); /* PHY needs ~10ms to start responding to MDIO */
378
379 err = t3_mdio_read(phy, MDIO_DEVAD_NONE, VSC8211_EXT_CTRL, &val);
380 if (err)
381 return err;
382 if (val & VSC_CTRL_MEDIA_MODE_HI) {
383 /* copper interface, just need to configure the LEDs */
384 return t3_mdio_write(phy, MDIO_DEVAD_NONE, VSC8211_LED_CTRL,
385 0x100);
386 }
387
388 phy->caps = SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
389 SUPPORTED_MII | SUPPORTED_FIBRE | SUPPORTED_IRQ;
390 phy->desc = "1000BASE-X";
391 phy->ops = &vsc8211_fiber_ops;
392
393 err = t3_mdio_write(phy, MDIO_DEVAD_NONE, VSC8211_EXT_PAGE_AXS, 1);
394 if (err)
395 return err;
396
397 err = t3_mdio_write(phy, MDIO_DEVAD_NONE, VSC8211_SIGDET_CTRL, 1);
398 if (err)
399 return err;
400
401 err = t3_mdio_write(phy, MDIO_DEVAD_NONE, VSC8211_EXT_PAGE_AXS, 0);
402 if (err)
403 return err;
404
405 err = t3_mdio_write(phy, MDIO_DEVAD_NONE, VSC8211_EXT_CTRL,
406 val | VSC_CTRL_CLAUSE37_VIEW);
407 if (err)
408 return err;
409
410 err = vsc8211_reset(phy, 0);
411 if (err)
412 return err;
413
414 udelay(5); /* delay after reset before next SMI */
415 return 0;
416 }
417