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[deliverable/linux.git] / drivers / net / ethernet / intel / ixgbe / ixgbe_phy.c
1 /*******************************************************************************
2
3 Intel 10 Gigabit PCI Express Linux driver
4 Copyright(c) 1999 - 2011 Intel Corporation.
5
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
9
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 more details.
14
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
21
22 Contact Information:
23 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
24 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
25
26 *******************************************************************************/
27
28 #include <linux/pci.h>
29 #include <linux/delay.h>
30 #include <linux/sched.h>
31
32 #include "ixgbe_common.h"
33 #include "ixgbe_phy.h"
34
35 static void ixgbe_i2c_start(struct ixgbe_hw *hw);
36 static void ixgbe_i2c_stop(struct ixgbe_hw *hw);
37 static s32 ixgbe_clock_in_i2c_byte(struct ixgbe_hw *hw, u8 *data);
38 static s32 ixgbe_clock_out_i2c_byte(struct ixgbe_hw *hw, u8 data);
39 static s32 ixgbe_get_i2c_ack(struct ixgbe_hw *hw);
40 static s32 ixgbe_clock_in_i2c_bit(struct ixgbe_hw *hw, bool *data);
41 static s32 ixgbe_clock_out_i2c_bit(struct ixgbe_hw *hw, bool data);
42 static s32 ixgbe_raise_i2c_clk(struct ixgbe_hw *hw, u32 *i2cctl);
43 static void ixgbe_lower_i2c_clk(struct ixgbe_hw *hw, u32 *i2cctl);
44 static s32 ixgbe_set_i2c_data(struct ixgbe_hw *hw, u32 *i2cctl, bool data);
45 static bool ixgbe_get_i2c_data(u32 *i2cctl);
46 static void ixgbe_i2c_bus_clear(struct ixgbe_hw *hw);
47 static enum ixgbe_phy_type ixgbe_get_phy_type_from_id(u32 phy_id);
48 static s32 ixgbe_get_phy_id(struct ixgbe_hw *hw);
49
50 /**
51 * ixgbe_identify_phy_generic - Get physical layer module
52 * @hw: pointer to hardware structure
53 *
54 * Determines the physical layer module found on the current adapter.
55 **/
56 s32 ixgbe_identify_phy_generic(struct ixgbe_hw *hw)
57 {
58 s32 status = IXGBE_ERR_PHY_ADDR_INVALID;
59 u32 phy_addr;
60 u16 ext_ability = 0;
61
62 if (hw->phy.type == ixgbe_phy_unknown) {
63 for (phy_addr = 0; phy_addr < IXGBE_MAX_PHY_ADDR; phy_addr++) {
64 hw->phy.mdio.prtad = phy_addr;
65 if (mdio45_probe(&hw->phy.mdio, phy_addr) == 0) {
66 ixgbe_get_phy_id(hw);
67 hw->phy.type =
68 ixgbe_get_phy_type_from_id(hw->phy.id);
69
70 if (hw->phy.type == ixgbe_phy_unknown) {
71 hw->phy.ops.read_reg(hw,
72 MDIO_PMA_EXTABLE,
73 MDIO_MMD_PMAPMD,
74 &ext_ability);
75 if (ext_ability &
76 (MDIO_PMA_EXTABLE_10GBT |
77 MDIO_PMA_EXTABLE_1000BT))
78 hw->phy.type =
79 ixgbe_phy_cu_unknown;
80 else
81 hw->phy.type =
82 ixgbe_phy_generic;
83 }
84
85 status = 0;
86 break;
87 }
88 }
89 /* clear value if nothing found */
90 if (status != 0)
91 hw->phy.mdio.prtad = 0;
92 } else {
93 status = 0;
94 }
95
96 return status;
97 }
98
99 /**
100 * ixgbe_get_phy_id - Get the phy type
101 * @hw: pointer to hardware structure
102 *
103 **/
104 static s32 ixgbe_get_phy_id(struct ixgbe_hw *hw)
105 {
106 u32 status;
107 u16 phy_id_high = 0;
108 u16 phy_id_low = 0;
109
110 status = hw->phy.ops.read_reg(hw, MDIO_DEVID1, MDIO_MMD_PMAPMD,
111 &phy_id_high);
112
113 if (status == 0) {
114 hw->phy.id = (u32)(phy_id_high << 16);
115 status = hw->phy.ops.read_reg(hw, MDIO_DEVID2, MDIO_MMD_PMAPMD,
116 &phy_id_low);
117 hw->phy.id |= (u32)(phy_id_low & IXGBE_PHY_REVISION_MASK);
118 hw->phy.revision = (u32)(phy_id_low & ~IXGBE_PHY_REVISION_MASK);
119 }
120 return status;
121 }
122
123 /**
124 * ixgbe_get_phy_type_from_id - Get the phy type
125 * @hw: pointer to hardware structure
126 *
127 **/
128 static enum ixgbe_phy_type ixgbe_get_phy_type_from_id(u32 phy_id)
129 {
130 enum ixgbe_phy_type phy_type;
131
132 switch (phy_id) {
133 case TN1010_PHY_ID:
134 phy_type = ixgbe_phy_tn;
135 break;
136 case X540_PHY_ID:
137 phy_type = ixgbe_phy_aq;
138 break;
139 case QT2022_PHY_ID:
140 phy_type = ixgbe_phy_qt;
141 break;
142 case ATH_PHY_ID:
143 phy_type = ixgbe_phy_nl;
144 break;
145 default:
146 phy_type = ixgbe_phy_unknown;
147 break;
148 }
149
150 return phy_type;
151 }
152
153 /**
154 * ixgbe_reset_phy_generic - Performs a PHY reset
155 * @hw: pointer to hardware structure
156 **/
157 s32 ixgbe_reset_phy_generic(struct ixgbe_hw *hw)
158 {
159 u32 i;
160 u16 ctrl = 0;
161 s32 status = 0;
162
163 if (hw->phy.type == ixgbe_phy_unknown)
164 status = ixgbe_identify_phy_generic(hw);
165
166 if (status != 0 || hw->phy.type == ixgbe_phy_none)
167 goto out;
168
169 /* Don't reset PHY if it's shut down due to overtemp. */
170 if (!hw->phy.reset_if_overtemp &&
171 (IXGBE_ERR_OVERTEMP == hw->phy.ops.check_overtemp(hw)))
172 goto out;
173
174 /*
175 * Perform soft PHY reset to the PHY_XS.
176 * This will cause a soft reset to the PHY
177 */
178 hw->phy.ops.write_reg(hw, MDIO_CTRL1,
179 MDIO_MMD_PHYXS,
180 MDIO_CTRL1_RESET);
181
182 /*
183 * Poll for reset bit to self-clear indicating reset is complete.
184 * Some PHYs could take up to 3 seconds to complete and need about
185 * 1.7 usec delay after the reset is complete.
186 */
187 for (i = 0; i < 30; i++) {
188 msleep(100);
189 hw->phy.ops.read_reg(hw, MDIO_CTRL1,
190 MDIO_MMD_PHYXS, &ctrl);
191 if (!(ctrl & MDIO_CTRL1_RESET)) {
192 udelay(2);
193 break;
194 }
195 }
196
197 if (ctrl & MDIO_CTRL1_RESET) {
198 status = IXGBE_ERR_RESET_FAILED;
199 hw_dbg(hw, "PHY reset polling failed to complete.\n");
200 }
201
202 out:
203 return status;
204 }
205
206 /**
207 * ixgbe_read_phy_reg_generic - Reads a value from a specified PHY register
208 * @hw: pointer to hardware structure
209 * @reg_addr: 32 bit address of PHY register to read
210 * @phy_data: Pointer to read data from PHY register
211 **/
212 s32 ixgbe_read_phy_reg_generic(struct ixgbe_hw *hw, u32 reg_addr,
213 u32 device_type, u16 *phy_data)
214 {
215 u32 command;
216 u32 i;
217 u32 data;
218 s32 status = 0;
219 u16 gssr;
220
221 if (IXGBE_READ_REG(hw, IXGBE_STATUS) & IXGBE_STATUS_LAN_ID_1)
222 gssr = IXGBE_GSSR_PHY1_SM;
223 else
224 gssr = IXGBE_GSSR_PHY0_SM;
225
226 if (hw->mac.ops.acquire_swfw_sync(hw, gssr) != 0)
227 status = IXGBE_ERR_SWFW_SYNC;
228
229 if (status == 0) {
230 /* Setup and write the address cycle command */
231 command = ((reg_addr << IXGBE_MSCA_NP_ADDR_SHIFT) |
232 (device_type << IXGBE_MSCA_DEV_TYPE_SHIFT) |
233 (hw->phy.mdio.prtad << IXGBE_MSCA_PHY_ADDR_SHIFT) |
234 (IXGBE_MSCA_ADDR_CYCLE | IXGBE_MSCA_MDI_COMMAND));
235
236 IXGBE_WRITE_REG(hw, IXGBE_MSCA, command);
237
238 /*
239 * Check every 10 usec to see if the address cycle completed.
240 * The MDI Command bit will clear when the operation is
241 * complete
242 */
243 for (i = 0; i < IXGBE_MDIO_COMMAND_TIMEOUT; i++) {
244 udelay(10);
245
246 command = IXGBE_READ_REG(hw, IXGBE_MSCA);
247
248 if ((command & IXGBE_MSCA_MDI_COMMAND) == 0)
249 break;
250 }
251
252 if ((command & IXGBE_MSCA_MDI_COMMAND) != 0) {
253 hw_dbg(hw, "PHY address command did not complete.\n");
254 status = IXGBE_ERR_PHY;
255 }
256
257 if (status == 0) {
258 /*
259 * Address cycle complete, setup and write the read
260 * command
261 */
262 command = ((reg_addr << IXGBE_MSCA_NP_ADDR_SHIFT) |
263 (device_type << IXGBE_MSCA_DEV_TYPE_SHIFT) |
264 (hw->phy.mdio.prtad <<
265 IXGBE_MSCA_PHY_ADDR_SHIFT) |
266 (IXGBE_MSCA_READ | IXGBE_MSCA_MDI_COMMAND));
267
268 IXGBE_WRITE_REG(hw, IXGBE_MSCA, command);
269
270 /*
271 * Check every 10 usec to see if the address cycle
272 * completed. The MDI Command bit will clear when the
273 * operation is complete
274 */
275 for (i = 0; i < IXGBE_MDIO_COMMAND_TIMEOUT; i++) {
276 udelay(10);
277
278 command = IXGBE_READ_REG(hw, IXGBE_MSCA);
279
280 if ((command & IXGBE_MSCA_MDI_COMMAND) == 0)
281 break;
282 }
283
284 if ((command & IXGBE_MSCA_MDI_COMMAND) != 0) {
285 hw_dbg(hw, "PHY read command didn't complete\n");
286 status = IXGBE_ERR_PHY;
287 } else {
288 /*
289 * Read operation is complete. Get the data
290 * from MSRWD
291 */
292 data = IXGBE_READ_REG(hw, IXGBE_MSRWD);
293 data >>= IXGBE_MSRWD_READ_DATA_SHIFT;
294 *phy_data = (u16)(data);
295 }
296 }
297
298 hw->mac.ops.release_swfw_sync(hw, gssr);
299 }
300
301 return status;
302 }
303
304 /**
305 * ixgbe_write_phy_reg_generic - Writes a value to specified PHY register
306 * @hw: pointer to hardware structure
307 * @reg_addr: 32 bit PHY register to write
308 * @device_type: 5 bit device type
309 * @phy_data: Data to write to the PHY register
310 **/
311 s32 ixgbe_write_phy_reg_generic(struct ixgbe_hw *hw, u32 reg_addr,
312 u32 device_type, u16 phy_data)
313 {
314 u32 command;
315 u32 i;
316 s32 status = 0;
317 u16 gssr;
318
319 if (IXGBE_READ_REG(hw, IXGBE_STATUS) & IXGBE_STATUS_LAN_ID_1)
320 gssr = IXGBE_GSSR_PHY1_SM;
321 else
322 gssr = IXGBE_GSSR_PHY0_SM;
323
324 if (hw->mac.ops.acquire_swfw_sync(hw, gssr) != 0)
325 status = IXGBE_ERR_SWFW_SYNC;
326
327 if (status == 0) {
328 /* Put the data in the MDI single read and write data register*/
329 IXGBE_WRITE_REG(hw, IXGBE_MSRWD, (u32)phy_data);
330
331 /* Setup and write the address cycle command */
332 command = ((reg_addr << IXGBE_MSCA_NP_ADDR_SHIFT) |
333 (device_type << IXGBE_MSCA_DEV_TYPE_SHIFT) |
334 (hw->phy.mdio.prtad << IXGBE_MSCA_PHY_ADDR_SHIFT) |
335 (IXGBE_MSCA_ADDR_CYCLE | IXGBE_MSCA_MDI_COMMAND));
336
337 IXGBE_WRITE_REG(hw, IXGBE_MSCA, command);
338
339 /*
340 * Check every 10 usec to see if the address cycle completed.
341 * The MDI Command bit will clear when the operation is
342 * complete
343 */
344 for (i = 0; i < IXGBE_MDIO_COMMAND_TIMEOUT; i++) {
345 udelay(10);
346
347 command = IXGBE_READ_REG(hw, IXGBE_MSCA);
348
349 if ((command & IXGBE_MSCA_MDI_COMMAND) == 0)
350 break;
351 }
352
353 if ((command & IXGBE_MSCA_MDI_COMMAND) != 0) {
354 hw_dbg(hw, "PHY address cmd didn't complete\n");
355 status = IXGBE_ERR_PHY;
356 }
357
358 if (status == 0) {
359 /*
360 * Address cycle complete, setup and write the write
361 * command
362 */
363 command = ((reg_addr << IXGBE_MSCA_NP_ADDR_SHIFT) |
364 (device_type << IXGBE_MSCA_DEV_TYPE_SHIFT) |
365 (hw->phy.mdio.prtad <<
366 IXGBE_MSCA_PHY_ADDR_SHIFT) |
367 (IXGBE_MSCA_WRITE | IXGBE_MSCA_MDI_COMMAND));
368
369 IXGBE_WRITE_REG(hw, IXGBE_MSCA, command);
370
371 /*
372 * Check every 10 usec to see if the address cycle
373 * completed. The MDI Command bit will clear when the
374 * operation is complete
375 */
376 for (i = 0; i < IXGBE_MDIO_COMMAND_TIMEOUT; i++) {
377 udelay(10);
378
379 command = IXGBE_READ_REG(hw, IXGBE_MSCA);
380
381 if ((command & IXGBE_MSCA_MDI_COMMAND) == 0)
382 break;
383 }
384
385 if ((command & IXGBE_MSCA_MDI_COMMAND) != 0) {
386 hw_dbg(hw, "PHY address cmd didn't complete\n");
387 status = IXGBE_ERR_PHY;
388 }
389 }
390
391 hw->mac.ops.release_swfw_sync(hw, gssr);
392 }
393
394 return status;
395 }
396
397 /**
398 * ixgbe_setup_phy_link_generic - Set and restart autoneg
399 * @hw: pointer to hardware structure
400 *
401 * Restart autonegotiation and PHY and waits for completion.
402 **/
403 s32 ixgbe_setup_phy_link_generic(struct ixgbe_hw *hw)
404 {
405 s32 status = 0;
406 u32 time_out;
407 u32 max_time_out = 10;
408 u16 autoneg_reg = IXGBE_MII_AUTONEG_REG;
409 bool autoneg = false;
410 ixgbe_link_speed speed;
411
412 ixgbe_get_copper_link_capabilities_generic(hw, &speed, &autoneg);
413
414 if (speed & IXGBE_LINK_SPEED_10GB_FULL) {
415 /* Set or unset auto-negotiation 10G advertisement */
416 hw->phy.ops.read_reg(hw, MDIO_AN_10GBT_CTRL,
417 MDIO_MMD_AN,
418 &autoneg_reg);
419
420 autoneg_reg &= ~MDIO_AN_10GBT_CTRL_ADV10G;
421 if (hw->phy.autoneg_advertised & IXGBE_LINK_SPEED_10GB_FULL)
422 autoneg_reg |= MDIO_AN_10GBT_CTRL_ADV10G;
423
424 hw->phy.ops.write_reg(hw, MDIO_AN_10GBT_CTRL,
425 MDIO_MMD_AN,
426 autoneg_reg);
427 }
428
429 if (speed & IXGBE_LINK_SPEED_1GB_FULL) {
430 /* Set or unset auto-negotiation 1G advertisement */
431 hw->phy.ops.read_reg(hw,
432 IXGBE_MII_AUTONEG_VENDOR_PROVISION_1_REG,
433 MDIO_MMD_AN,
434 &autoneg_reg);
435
436 autoneg_reg &= ~IXGBE_MII_1GBASE_T_ADVERTISE;
437 if (hw->phy.autoneg_advertised & IXGBE_LINK_SPEED_1GB_FULL)
438 autoneg_reg |= IXGBE_MII_1GBASE_T_ADVERTISE;
439
440 hw->phy.ops.write_reg(hw,
441 IXGBE_MII_AUTONEG_VENDOR_PROVISION_1_REG,
442 MDIO_MMD_AN,
443 autoneg_reg);
444 }
445
446 if (speed & IXGBE_LINK_SPEED_100_FULL) {
447 /* Set or unset auto-negotiation 100M advertisement */
448 hw->phy.ops.read_reg(hw, MDIO_AN_ADVERTISE,
449 MDIO_MMD_AN,
450 &autoneg_reg);
451
452 autoneg_reg &= ~(ADVERTISE_100FULL |
453 ADVERTISE_100HALF);
454 if (hw->phy.autoneg_advertised & IXGBE_LINK_SPEED_100_FULL)
455 autoneg_reg |= ADVERTISE_100FULL;
456
457 hw->phy.ops.write_reg(hw, MDIO_AN_ADVERTISE,
458 MDIO_MMD_AN,
459 autoneg_reg);
460 }
461
462 /* Restart PHY autonegotiation and wait for completion */
463 hw->phy.ops.read_reg(hw, MDIO_CTRL1,
464 MDIO_MMD_AN, &autoneg_reg);
465
466 autoneg_reg |= MDIO_AN_CTRL1_RESTART;
467
468 hw->phy.ops.write_reg(hw, MDIO_CTRL1,
469 MDIO_MMD_AN, autoneg_reg);
470
471 /* Wait for autonegotiation to finish */
472 for (time_out = 0; time_out < max_time_out; time_out++) {
473 udelay(10);
474 /* Restart PHY autonegotiation and wait for completion */
475 status = hw->phy.ops.read_reg(hw, MDIO_STAT1,
476 MDIO_MMD_AN,
477 &autoneg_reg);
478
479 autoneg_reg &= MDIO_AN_STAT1_COMPLETE;
480 if (autoneg_reg == MDIO_AN_STAT1_COMPLETE) {
481 break;
482 }
483 }
484
485 if (time_out == max_time_out) {
486 status = IXGBE_ERR_LINK_SETUP;
487 hw_dbg(hw, "ixgbe_setup_phy_link_generic: time out");
488 }
489
490 return status;
491 }
492
493 /**
494 * ixgbe_setup_phy_link_speed_generic - Sets the auto advertised capabilities
495 * @hw: pointer to hardware structure
496 * @speed: new link speed
497 * @autoneg: true if autonegotiation enabled
498 **/
499 s32 ixgbe_setup_phy_link_speed_generic(struct ixgbe_hw *hw,
500 ixgbe_link_speed speed,
501 bool autoneg,
502 bool autoneg_wait_to_complete)
503 {
504
505 /*
506 * Clear autoneg_advertised and set new values based on input link
507 * speed.
508 */
509 hw->phy.autoneg_advertised = 0;
510
511 if (speed & IXGBE_LINK_SPEED_10GB_FULL)
512 hw->phy.autoneg_advertised |= IXGBE_LINK_SPEED_10GB_FULL;
513
514 if (speed & IXGBE_LINK_SPEED_1GB_FULL)
515 hw->phy.autoneg_advertised |= IXGBE_LINK_SPEED_1GB_FULL;
516
517 if (speed & IXGBE_LINK_SPEED_100_FULL)
518 hw->phy.autoneg_advertised |= IXGBE_LINK_SPEED_100_FULL;
519
520 /* Setup link based on the new speed settings */
521 hw->phy.ops.setup_link(hw);
522
523 return 0;
524 }
525
526 /**
527 * ixgbe_get_copper_link_capabilities_generic - Determines link capabilities
528 * @hw: pointer to hardware structure
529 * @speed: pointer to link speed
530 * @autoneg: boolean auto-negotiation value
531 *
532 * Determines the link capabilities by reading the AUTOC register.
533 */
534 s32 ixgbe_get_copper_link_capabilities_generic(struct ixgbe_hw *hw,
535 ixgbe_link_speed *speed,
536 bool *autoneg)
537 {
538 s32 status = IXGBE_ERR_LINK_SETUP;
539 u16 speed_ability;
540
541 *speed = 0;
542 *autoneg = true;
543
544 status = hw->phy.ops.read_reg(hw, MDIO_SPEED, MDIO_MMD_PMAPMD,
545 &speed_ability);
546
547 if (status == 0) {
548 if (speed_ability & MDIO_SPEED_10G)
549 *speed |= IXGBE_LINK_SPEED_10GB_FULL;
550 if (speed_ability & MDIO_PMA_SPEED_1000)
551 *speed |= IXGBE_LINK_SPEED_1GB_FULL;
552 if (speed_ability & MDIO_PMA_SPEED_100)
553 *speed |= IXGBE_LINK_SPEED_100_FULL;
554 }
555
556 return status;
557 }
558
559 /**
560 * ixgbe_check_phy_link_tnx - Determine link and speed status
561 * @hw: pointer to hardware structure
562 *
563 * Reads the VS1 register to determine if link is up and the current speed for
564 * the PHY.
565 **/
566 s32 ixgbe_check_phy_link_tnx(struct ixgbe_hw *hw, ixgbe_link_speed *speed,
567 bool *link_up)
568 {
569 s32 status = 0;
570 u32 time_out;
571 u32 max_time_out = 10;
572 u16 phy_link = 0;
573 u16 phy_speed = 0;
574 u16 phy_data = 0;
575
576 /* Initialize speed and link to default case */
577 *link_up = false;
578 *speed = IXGBE_LINK_SPEED_10GB_FULL;
579
580 /*
581 * Check current speed and link status of the PHY register.
582 * This is a vendor specific register and may have to
583 * be changed for other copper PHYs.
584 */
585 for (time_out = 0; time_out < max_time_out; time_out++) {
586 udelay(10);
587 status = hw->phy.ops.read_reg(hw,
588 MDIO_STAT1,
589 MDIO_MMD_VEND1,
590 &phy_data);
591 phy_link = phy_data &
592 IXGBE_MDIO_VENDOR_SPECIFIC_1_LINK_STATUS;
593 phy_speed = phy_data &
594 IXGBE_MDIO_VENDOR_SPECIFIC_1_SPEED_STATUS;
595 if (phy_link == IXGBE_MDIO_VENDOR_SPECIFIC_1_LINK_STATUS) {
596 *link_up = true;
597 if (phy_speed ==
598 IXGBE_MDIO_VENDOR_SPECIFIC_1_SPEED_STATUS)
599 *speed = IXGBE_LINK_SPEED_1GB_FULL;
600 break;
601 }
602 }
603
604 return status;
605 }
606
607 /**
608 * ixgbe_setup_phy_link_tnx - Set and restart autoneg
609 * @hw: pointer to hardware structure
610 *
611 * Restart autonegotiation and PHY and waits for completion.
612 **/
613 s32 ixgbe_setup_phy_link_tnx(struct ixgbe_hw *hw)
614 {
615 s32 status = 0;
616 u32 time_out;
617 u32 max_time_out = 10;
618 u16 autoneg_reg = IXGBE_MII_AUTONEG_REG;
619 bool autoneg = false;
620 ixgbe_link_speed speed;
621
622 ixgbe_get_copper_link_capabilities_generic(hw, &speed, &autoneg);
623
624 if (speed & IXGBE_LINK_SPEED_10GB_FULL) {
625 /* Set or unset auto-negotiation 10G advertisement */
626 hw->phy.ops.read_reg(hw, MDIO_AN_10GBT_CTRL,
627 MDIO_MMD_AN,
628 &autoneg_reg);
629
630 autoneg_reg &= ~MDIO_AN_10GBT_CTRL_ADV10G;
631 if (hw->phy.autoneg_advertised & IXGBE_LINK_SPEED_10GB_FULL)
632 autoneg_reg |= MDIO_AN_10GBT_CTRL_ADV10G;
633
634 hw->phy.ops.write_reg(hw, MDIO_AN_10GBT_CTRL,
635 MDIO_MMD_AN,
636 autoneg_reg);
637 }
638
639 if (speed & IXGBE_LINK_SPEED_1GB_FULL) {
640 /* Set or unset auto-negotiation 1G advertisement */
641 hw->phy.ops.read_reg(hw, IXGBE_MII_AUTONEG_XNP_TX_REG,
642 MDIO_MMD_AN,
643 &autoneg_reg);
644
645 autoneg_reg &= ~IXGBE_MII_1GBASE_T_ADVERTISE_XNP_TX;
646 if (hw->phy.autoneg_advertised & IXGBE_LINK_SPEED_1GB_FULL)
647 autoneg_reg |= IXGBE_MII_1GBASE_T_ADVERTISE_XNP_TX;
648
649 hw->phy.ops.write_reg(hw, IXGBE_MII_AUTONEG_XNP_TX_REG,
650 MDIO_MMD_AN,
651 autoneg_reg);
652 }
653
654 if (speed & IXGBE_LINK_SPEED_100_FULL) {
655 /* Set or unset auto-negotiation 100M advertisement */
656 hw->phy.ops.read_reg(hw, MDIO_AN_ADVERTISE,
657 MDIO_MMD_AN,
658 &autoneg_reg);
659
660 autoneg_reg &= ~(ADVERTISE_100FULL |
661 ADVERTISE_100HALF);
662 if (hw->phy.autoneg_advertised & IXGBE_LINK_SPEED_100_FULL)
663 autoneg_reg |= ADVERTISE_100FULL;
664
665 hw->phy.ops.write_reg(hw, MDIO_AN_ADVERTISE,
666 MDIO_MMD_AN,
667 autoneg_reg);
668 }
669
670 /* Restart PHY autonegotiation and wait for completion */
671 hw->phy.ops.read_reg(hw, MDIO_CTRL1,
672 MDIO_MMD_AN, &autoneg_reg);
673
674 autoneg_reg |= MDIO_AN_CTRL1_RESTART;
675
676 hw->phy.ops.write_reg(hw, MDIO_CTRL1,
677 MDIO_MMD_AN, autoneg_reg);
678
679 /* Wait for autonegotiation to finish */
680 for (time_out = 0; time_out < max_time_out; time_out++) {
681 udelay(10);
682 /* Restart PHY autonegotiation and wait for completion */
683 status = hw->phy.ops.read_reg(hw, MDIO_STAT1,
684 MDIO_MMD_AN,
685 &autoneg_reg);
686
687 autoneg_reg &= MDIO_AN_STAT1_COMPLETE;
688 if (autoneg_reg == MDIO_AN_STAT1_COMPLETE)
689 break;
690 }
691
692 if (time_out == max_time_out) {
693 status = IXGBE_ERR_LINK_SETUP;
694 hw_dbg(hw, "ixgbe_setup_phy_link_tnx: time out");
695 }
696
697 return status;
698 }
699
700 /**
701 * ixgbe_get_phy_firmware_version_tnx - Gets the PHY Firmware Version
702 * @hw: pointer to hardware structure
703 * @firmware_version: pointer to the PHY Firmware Version
704 **/
705 s32 ixgbe_get_phy_firmware_version_tnx(struct ixgbe_hw *hw,
706 u16 *firmware_version)
707 {
708 s32 status = 0;
709
710 status = hw->phy.ops.read_reg(hw, TNX_FW_REV,
711 MDIO_MMD_VEND1,
712 firmware_version);
713
714 return status;
715 }
716
717 /**
718 * ixgbe_get_phy_firmware_version_generic - Gets the PHY Firmware Version
719 * @hw: pointer to hardware structure
720 * @firmware_version: pointer to the PHY Firmware Version
721 **/
722 s32 ixgbe_get_phy_firmware_version_generic(struct ixgbe_hw *hw,
723 u16 *firmware_version)
724 {
725 s32 status = 0;
726
727 status = hw->phy.ops.read_reg(hw, AQ_FW_REV,
728 MDIO_MMD_VEND1,
729 firmware_version);
730
731 return status;
732 }
733
734 /**
735 * ixgbe_reset_phy_nl - Performs a PHY reset
736 * @hw: pointer to hardware structure
737 **/
738 s32 ixgbe_reset_phy_nl(struct ixgbe_hw *hw)
739 {
740 u16 phy_offset, control, eword, edata, block_crc;
741 bool end_data = false;
742 u16 list_offset, data_offset;
743 u16 phy_data = 0;
744 s32 ret_val = 0;
745 u32 i;
746
747 hw->phy.ops.read_reg(hw, MDIO_CTRL1, MDIO_MMD_PHYXS, &phy_data);
748
749 /* reset the PHY and poll for completion */
750 hw->phy.ops.write_reg(hw, MDIO_CTRL1, MDIO_MMD_PHYXS,
751 (phy_data | MDIO_CTRL1_RESET));
752
753 for (i = 0; i < 100; i++) {
754 hw->phy.ops.read_reg(hw, MDIO_CTRL1, MDIO_MMD_PHYXS,
755 &phy_data);
756 if ((phy_data & MDIO_CTRL1_RESET) == 0)
757 break;
758 usleep_range(10000, 20000);
759 }
760
761 if ((phy_data & MDIO_CTRL1_RESET) != 0) {
762 hw_dbg(hw, "PHY reset did not complete.\n");
763 ret_val = IXGBE_ERR_PHY;
764 goto out;
765 }
766
767 /* Get init offsets */
768 ret_val = ixgbe_get_sfp_init_sequence_offsets(hw, &list_offset,
769 &data_offset);
770 if (ret_val != 0)
771 goto out;
772
773 ret_val = hw->eeprom.ops.read(hw, data_offset, &block_crc);
774 data_offset++;
775 while (!end_data) {
776 /*
777 * Read control word from PHY init contents offset
778 */
779 ret_val = hw->eeprom.ops.read(hw, data_offset, &eword);
780 control = (eword & IXGBE_CONTROL_MASK_NL) >>
781 IXGBE_CONTROL_SHIFT_NL;
782 edata = eword & IXGBE_DATA_MASK_NL;
783 switch (control) {
784 case IXGBE_DELAY_NL:
785 data_offset++;
786 hw_dbg(hw, "DELAY: %d MS\n", edata);
787 usleep_range(edata * 1000, edata * 2000);
788 break;
789 case IXGBE_DATA_NL:
790 hw_dbg(hw, "DATA:\n");
791 data_offset++;
792 hw->eeprom.ops.read(hw, data_offset++,
793 &phy_offset);
794 for (i = 0; i < edata; i++) {
795 hw->eeprom.ops.read(hw, data_offset, &eword);
796 hw->phy.ops.write_reg(hw, phy_offset,
797 MDIO_MMD_PMAPMD, eword);
798 hw_dbg(hw, "Wrote %4.4x to %4.4x\n", eword,
799 phy_offset);
800 data_offset++;
801 phy_offset++;
802 }
803 break;
804 case IXGBE_CONTROL_NL:
805 data_offset++;
806 hw_dbg(hw, "CONTROL:\n");
807 if (edata == IXGBE_CONTROL_EOL_NL) {
808 hw_dbg(hw, "EOL\n");
809 end_data = true;
810 } else if (edata == IXGBE_CONTROL_SOL_NL) {
811 hw_dbg(hw, "SOL\n");
812 } else {
813 hw_dbg(hw, "Bad control value\n");
814 ret_val = IXGBE_ERR_PHY;
815 goto out;
816 }
817 break;
818 default:
819 hw_dbg(hw, "Bad control type\n");
820 ret_val = IXGBE_ERR_PHY;
821 goto out;
822 }
823 }
824
825 out:
826 return ret_val;
827 }
828
829 /**
830 * ixgbe_identify_sfp_module_generic - Identifies SFP modules
831 * @hw: pointer to hardware structure
832 *
833 * Searches for and identifies the SFP module and assigns appropriate PHY type.
834 **/
835 s32 ixgbe_identify_sfp_module_generic(struct ixgbe_hw *hw)
836 {
837 s32 status = IXGBE_ERR_PHY_ADDR_INVALID;
838 u32 vendor_oui = 0;
839 enum ixgbe_sfp_type stored_sfp_type = hw->phy.sfp_type;
840 u8 identifier = 0;
841 u8 comp_codes_1g = 0;
842 u8 comp_codes_10g = 0;
843 u8 oui_bytes[3] = {0, 0, 0};
844 u8 cable_tech = 0;
845 u8 cable_spec = 0;
846 u16 enforce_sfp = 0;
847
848 if (hw->mac.ops.get_media_type(hw) != ixgbe_media_type_fiber) {
849 hw->phy.sfp_type = ixgbe_sfp_type_not_present;
850 status = IXGBE_ERR_SFP_NOT_PRESENT;
851 goto out;
852 }
853
854 status = hw->phy.ops.read_i2c_eeprom(hw,
855 IXGBE_SFF_IDENTIFIER,
856 &identifier);
857
858 if (status == IXGBE_ERR_SWFW_SYNC ||
859 status == IXGBE_ERR_I2C ||
860 status == IXGBE_ERR_SFP_NOT_PRESENT)
861 goto err_read_i2c_eeprom;
862
863 /* LAN ID is needed for sfp_type determination */
864 hw->mac.ops.set_lan_id(hw);
865
866 if (identifier != IXGBE_SFF_IDENTIFIER_SFP) {
867 hw->phy.type = ixgbe_phy_sfp_unsupported;
868 status = IXGBE_ERR_SFP_NOT_SUPPORTED;
869 } else {
870 status = hw->phy.ops.read_i2c_eeprom(hw,
871 IXGBE_SFF_1GBE_COMP_CODES,
872 &comp_codes_1g);
873
874 if (status == IXGBE_ERR_SWFW_SYNC ||
875 status == IXGBE_ERR_I2C ||
876 status == IXGBE_ERR_SFP_NOT_PRESENT)
877 goto err_read_i2c_eeprom;
878
879 status = hw->phy.ops.read_i2c_eeprom(hw,
880 IXGBE_SFF_10GBE_COMP_CODES,
881 &comp_codes_10g);
882
883 if (status == IXGBE_ERR_SWFW_SYNC ||
884 status == IXGBE_ERR_I2C ||
885 status == IXGBE_ERR_SFP_NOT_PRESENT)
886 goto err_read_i2c_eeprom;
887 status = hw->phy.ops.read_i2c_eeprom(hw,
888 IXGBE_SFF_CABLE_TECHNOLOGY,
889 &cable_tech);
890
891 if (status == IXGBE_ERR_SWFW_SYNC ||
892 status == IXGBE_ERR_I2C ||
893 status == IXGBE_ERR_SFP_NOT_PRESENT)
894 goto err_read_i2c_eeprom;
895
896 /* ID Module
897 * =========
898 * 0 SFP_DA_CU
899 * 1 SFP_SR
900 * 2 SFP_LR
901 * 3 SFP_DA_CORE0 - 82599-specific
902 * 4 SFP_DA_CORE1 - 82599-specific
903 * 5 SFP_SR/LR_CORE0 - 82599-specific
904 * 6 SFP_SR/LR_CORE1 - 82599-specific
905 * 7 SFP_act_lmt_DA_CORE0 - 82599-specific
906 * 8 SFP_act_lmt_DA_CORE1 - 82599-specific
907 * 9 SFP_1g_cu_CORE0 - 82599-specific
908 * 10 SFP_1g_cu_CORE1 - 82599-specific
909 */
910 if (hw->mac.type == ixgbe_mac_82598EB) {
911 if (cable_tech & IXGBE_SFF_DA_PASSIVE_CABLE)
912 hw->phy.sfp_type = ixgbe_sfp_type_da_cu;
913 else if (comp_codes_10g & IXGBE_SFF_10GBASESR_CAPABLE)
914 hw->phy.sfp_type = ixgbe_sfp_type_sr;
915 else if (comp_codes_10g & IXGBE_SFF_10GBASELR_CAPABLE)
916 hw->phy.sfp_type = ixgbe_sfp_type_lr;
917 else
918 hw->phy.sfp_type = ixgbe_sfp_type_unknown;
919 } else if (hw->mac.type == ixgbe_mac_82599EB) {
920 if (cable_tech & IXGBE_SFF_DA_PASSIVE_CABLE) {
921 if (hw->bus.lan_id == 0)
922 hw->phy.sfp_type =
923 ixgbe_sfp_type_da_cu_core0;
924 else
925 hw->phy.sfp_type =
926 ixgbe_sfp_type_da_cu_core1;
927 } else if (cable_tech & IXGBE_SFF_DA_ACTIVE_CABLE) {
928 hw->phy.ops.read_i2c_eeprom(
929 hw, IXGBE_SFF_CABLE_SPEC_COMP,
930 &cable_spec);
931 if (cable_spec &
932 IXGBE_SFF_DA_SPEC_ACTIVE_LIMITING) {
933 if (hw->bus.lan_id == 0)
934 hw->phy.sfp_type =
935 ixgbe_sfp_type_da_act_lmt_core0;
936 else
937 hw->phy.sfp_type =
938 ixgbe_sfp_type_da_act_lmt_core1;
939 } else {
940 hw->phy.sfp_type =
941 ixgbe_sfp_type_unknown;
942 }
943 } else if (comp_codes_10g &
944 (IXGBE_SFF_10GBASESR_CAPABLE |
945 IXGBE_SFF_10GBASELR_CAPABLE)) {
946 if (hw->bus.lan_id == 0)
947 hw->phy.sfp_type =
948 ixgbe_sfp_type_srlr_core0;
949 else
950 hw->phy.sfp_type =
951 ixgbe_sfp_type_srlr_core1;
952 } else if (comp_codes_1g & IXGBE_SFF_1GBASET_CAPABLE) {
953 if (hw->bus.lan_id == 0)
954 hw->phy.sfp_type =
955 ixgbe_sfp_type_1g_cu_core0;
956 else
957 hw->phy.sfp_type =
958 ixgbe_sfp_type_1g_cu_core1;
959 } else {
960 hw->phy.sfp_type = ixgbe_sfp_type_unknown;
961 }
962 }
963
964 if (hw->phy.sfp_type != stored_sfp_type)
965 hw->phy.sfp_setup_needed = true;
966
967 /* Determine if the SFP+ PHY is dual speed or not. */
968 hw->phy.multispeed_fiber = false;
969 if (((comp_codes_1g & IXGBE_SFF_1GBASESX_CAPABLE) &&
970 (comp_codes_10g & IXGBE_SFF_10GBASESR_CAPABLE)) ||
971 ((comp_codes_1g & IXGBE_SFF_1GBASELX_CAPABLE) &&
972 (comp_codes_10g & IXGBE_SFF_10GBASELR_CAPABLE)))
973 hw->phy.multispeed_fiber = true;
974
975 /* Determine PHY vendor */
976 if (hw->phy.type != ixgbe_phy_nl) {
977 hw->phy.id = identifier;
978 status = hw->phy.ops.read_i2c_eeprom(hw,
979 IXGBE_SFF_VENDOR_OUI_BYTE0,
980 &oui_bytes[0]);
981
982 if (status == IXGBE_ERR_SWFW_SYNC ||
983 status == IXGBE_ERR_I2C ||
984 status == IXGBE_ERR_SFP_NOT_PRESENT)
985 goto err_read_i2c_eeprom;
986
987 status = hw->phy.ops.read_i2c_eeprom(hw,
988 IXGBE_SFF_VENDOR_OUI_BYTE1,
989 &oui_bytes[1]);
990
991 if (status == IXGBE_ERR_SWFW_SYNC ||
992 status == IXGBE_ERR_I2C ||
993 status == IXGBE_ERR_SFP_NOT_PRESENT)
994 goto err_read_i2c_eeprom;
995
996 status = hw->phy.ops.read_i2c_eeprom(hw,
997 IXGBE_SFF_VENDOR_OUI_BYTE2,
998 &oui_bytes[2]);
999
1000 if (status == IXGBE_ERR_SWFW_SYNC ||
1001 status == IXGBE_ERR_I2C ||
1002 status == IXGBE_ERR_SFP_NOT_PRESENT)
1003 goto err_read_i2c_eeprom;
1004
1005 vendor_oui =
1006 ((oui_bytes[0] << IXGBE_SFF_VENDOR_OUI_BYTE0_SHIFT) |
1007 (oui_bytes[1] << IXGBE_SFF_VENDOR_OUI_BYTE1_SHIFT) |
1008 (oui_bytes[2] << IXGBE_SFF_VENDOR_OUI_BYTE2_SHIFT));
1009
1010 switch (vendor_oui) {
1011 case IXGBE_SFF_VENDOR_OUI_TYCO:
1012 if (cable_tech & IXGBE_SFF_DA_PASSIVE_CABLE)
1013 hw->phy.type =
1014 ixgbe_phy_sfp_passive_tyco;
1015 break;
1016 case IXGBE_SFF_VENDOR_OUI_FTL:
1017 if (cable_tech & IXGBE_SFF_DA_ACTIVE_CABLE)
1018 hw->phy.type = ixgbe_phy_sfp_ftl_active;
1019 else
1020 hw->phy.type = ixgbe_phy_sfp_ftl;
1021 break;
1022 case IXGBE_SFF_VENDOR_OUI_AVAGO:
1023 hw->phy.type = ixgbe_phy_sfp_avago;
1024 break;
1025 case IXGBE_SFF_VENDOR_OUI_INTEL:
1026 hw->phy.type = ixgbe_phy_sfp_intel;
1027 break;
1028 default:
1029 if (cable_tech & IXGBE_SFF_DA_PASSIVE_CABLE)
1030 hw->phy.type =
1031 ixgbe_phy_sfp_passive_unknown;
1032 else if (cable_tech & IXGBE_SFF_DA_ACTIVE_CABLE)
1033 hw->phy.type =
1034 ixgbe_phy_sfp_active_unknown;
1035 else
1036 hw->phy.type = ixgbe_phy_sfp_unknown;
1037 break;
1038 }
1039 }
1040
1041 /* Allow any DA cable vendor */
1042 if (cable_tech & (IXGBE_SFF_DA_PASSIVE_CABLE |
1043 IXGBE_SFF_DA_ACTIVE_CABLE)) {
1044 status = 0;
1045 goto out;
1046 }
1047
1048 /* Verify supported 1G SFP modules */
1049 if (comp_codes_10g == 0 &&
1050 !(hw->phy.sfp_type == ixgbe_sfp_type_1g_cu_core1 ||
1051 hw->phy.sfp_type == ixgbe_sfp_type_1g_cu_core0)) {
1052 hw->phy.type = ixgbe_phy_sfp_unsupported;
1053 status = IXGBE_ERR_SFP_NOT_SUPPORTED;
1054 goto out;
1055 }
1056
1057 /* Anything else 82598-based is supported */
1058 if (hw->mac.type == ixgbe_mac_82598EB) {
1059 status = 0;
1060 goto out;
1061 }
1062
1063 hw->mac.ops.get_device_caps(hw, &enforce_sfp);
1064 if (!(enforce_sfp & IXGBE_DEVICE_CAPS_ALLOW_ANY_SFP) &&
1065 !((hw->phy.sfp_type == ixgbe_sfp_type_1g_cu_core0) ||
1066 (hw->phy.sfp_type == ixgbe_sfp_type_1g_cu_core1))) {
1067 /* Make sure we're a supported PHY type */
1068 if (hw->phy.type == ixgbe_phy_sfp_intel) {
1069 status = 0;
1070 } else {
1071 hw_dbg(hw, "SFP+ module not supported\n");
1072 hw->phy.type = ixgbe_phy_sfp_unsupported;
1073 status = IXGBE_ERR_SFP_NOT_SUPPORTED;
1074 }
1075 } else {
1076 status = 0;
1077 }
1078 }
1079
1080 out:
1081 return status;
1082
1083 err_read_i2c_eeprom:
1084 hw->phy.sfp_type = ixgbe_sfp_type_not_present;
1085 if (hw->phy.type != ixgbe_phy_nl) {
1086 hw->phy.id = 0;
1087 hw->phy.type = ixgbe_phy_unknown;
1088 }
1089 return IXGBE_ERR_SFP_NOT_PRESENT;
1090 }
1091
1092 /**
1093 * ixgbe_get_sfp_init_sequence_offsets - Provides offset of PHY init sequence
1094 * @hw: pointer to hardware structure
1095 * @list_offset: offset to the SFP ID list
1096 * @data_offset: offset to the SFP data block
1097 *
1098 * Checks the MAC's EEPROM to see if it supports a given SFP+ module type, if
1099 * so it returns the offsets to the phy init sequence block.
1100 **/
1101 s32 ixgbe_get_sfp_init_sequence_offsets(struct ixgbe_hw *hw,
1102 u16 *list_offset,
1103 u16 *data_offset)
1104 {
1105 u16 sfp_id;
1106 u16 sfp_type = hw->phy.sfp_type;
1107
1108 if (hw->phy.sfp_type == ixgbe_sfp_type_unknown)
1109 return IXGBE_ERR_SFP_NOT_SUPPORTED;
1110
1111 if (hw->phy.sfp_type == ixgbe_sfp_type_not_present)
1112 return IXGBE_ERR_SFP_NOT_PRESENT;
1113
1114 if ((hw->device_id == IXGBE_DEV_ID_82598_SR_DUAL_PORT_EM) &&
1115 (hw->phy.sfp_type == ixgbe_sfp_type_da_cu))
1116 return IXGBE_ERR_SFP_NOT_SUPPORTED;
1117
1118 /*
1119 * Limiting active cables and 1G Phys must be initialized as
1120 * SR modules
1121 */
1122 if (sfp_type == ixgbe_sfp_type_da_act_lmt_core0 ||
1123 sfp_type == ixgbe_sfp_type_1g_cu_core0)
1124 sfp_type = ixgbe_sfp_type_srlr_core0;
1125 else if (sfp_type == ixgbe_sfp_type_da_act_lmt_core1 ||
1126 sfp_type == ixgbe_sfp_type_1g_cu_core1)
1127 sfp_type = ixgbe_sfp_type_srlr_core1;
1128
1129 /* Read offset to PHY init contents */
1130 hw->eeprom.ops.read(hw, IXGBE_PHY_INIT_OFFSET_NL, list_offset);
1131
1132 if ((!*list_offset) || (*list_offset == 0xFFFF))
1133 return IXGBE_ERR_SFP_NO_INIT_SEQ_PRESENT;
1134
1135 /* Shift offset to first ID word */
1136 (*list_offset)++;
1137
1138 /*
1139 * Find the matching SFP ID in the EEPROM
1140 * and program the init sequence
1141 */
1142 hw->eeprom.ops.read(hw, *list_offset, &sfp_id);
1143
1144 while (sfp_id != IXGBE_PHY_INIT_END_NL) {
1145 if (sfp_id == sfp_type) {
1146 (*list_offset)++;
1147 hw->eeprom.ops.read(hw, *list_offset, data_offset);
1148 if ((!*data_offset) || (*data_offset == 0xFFFF)) {
1149 hw_dbg(hw, "SFP+ module not supported\n");
1150 return IXGBE_ERR_SFP_NOT_SUPPORTED;
1151 } else {
1152 break;
1153 }
1154 } else {
1155 (*list_offset) += 2;
1156 if (hw->eeprom.ops.read(hw, *list_offset, &sfp_id))
1157 return IXGBE_ERR_PHY;
1158 }
1159 }
1160
1161 if (sfp_id == IXGBE_PHY_INIT_END_NL) {
1162 hw_dbg(hw, "No matching SFP+ module found\n");
1163 return IXGBE_ERR_SFP_NOT_SUPPORTED;
1164 }
1165
1166 return 0;
1167 }
1168
1169 /**
1170 * ixgbe_read_i2c_eeprom_generic - Reads 8 bit EEPROM word over I2C interface
1171 * @hw: pointer to hardware structure
1172 * @byte_offset: EEPROM byte offset to read
1173 * @eeprom_data: value read
1174 *
1175 * Performs byte read operation to SFP module's EEPROM over I2C interface.
1176 **/
1177 s32 ixgbe_read_i2c_eeprom_generic(struct ixgbe_hw *hw, u8 byte_offset,
1178 u8 *eeprom_data)
1179 {
1180 return hw->phy.ops.read_i2c_byte(hw, byte_offset,
1181 IXGBE_I2C_EEPROM_DEV_ADDR,
1182 eeprom_data);
1183 }
1184
1185 /**
1186 * ixgbe_write_i2c_eeprom_generic - Writes 8 bit EEPROM word over I2C interface
1187 * @hw: pointer to hardware structure
1188 * @byte_offset: EEPROM byte offset to write
1189 * @eeprom_data: value to write
1190 *
1191 * Performs byte write operation to SFP module's EEPROM over I2C interface.
1192 **/
1193 s32 ixgbe_write_i2c_eeprom_generic(struct ixgbe_hw *hw, u8 byte_offset,
1194 u8 eeprom_data)
1195 {
1196 return hw->phy.ops.write_i2c_byte(hw, byte_offset,
1197 IXGBE_I2C_EEPROM_DEV_ADDR,
1198 eeprom_data);
1199 }
1200
1201 /**
1202 * ixgbe_read_i2c_byte_generic - Reads 8 bit word over I2C
1203 * @hw: pointer to hardware structure
1204 * @byte_offset: byte offset to read
1205 * @data: value read
1206 *
1207 * Performs byte read operation to SFP module's EEPROM over I2C interface at
1208 * a specified device address.
1209 **/
1210 s32 ixgbe_read_i2c_byte_generic(struct ixgbe_hw *hw, u8 byte_offset,
1211 u8 dev_addr, u8 *data)
1212 {
1213 s32 status = 0;
1214 u32 max_retry = 10;
1215 u32 retry = 0;
1216 u16 swfw_mask = 0;
1217 bool nack = 1;
1218 *data = 0;
1219
1220 if (IXGBE_READ_REG(hw, IXGBE_STATUS) & IXGBE_STATUS_LAN_ID_1)
1221 swfw_mask = IXGBE_GSSR_PHY1_SM;
1222 else
1223 swfw_mask = IXGBE_GSSR_PHY0_SM;
1224
1225 do {
1226 if (hw->mac.ops.acquire_swfw_sync(hw, swfw_mask) != 0) {
1227 status = IXGBE_ERR_SWFW_SYNC;
1228 goto read_byte_out;
1229 }
1230
1231 ixgbe_i2c_start(hw);
1232
1233 /* Device Address and write indication */
1234 status = ixgbe_clock_out_i2c_byte(hw, dev_addr);
1235 if (status != 0)
1236 goto fail;
1237
1238 status = ixgbe_get_i2c_ack(hw);
1239 if (status != 0)
1240 goto fail;
1241
1242 status = ixgbe_clock_out_i2c_byte(hw, byte_offset);
1243 if (status != 0)
1244 goto fail;
1245
1246 status = ixgbe_get_i2c_ack(hw);
1247 if (status != 0)
1248 goto fail;
1249
1250 ixgbe_i2c_start(hw);
1251
1252 /* Device Address and read indication */
1253 status = ixgbe_clock_out_i2c_byte(hw, (dev_addr | 0x1));
1254 if (status != 0)
1255 goto fail;
1256
1257 status = ixgbe_get_i2c_ack(hw);
1258 if (status != 0)
1259 goto fail;
1260
1261 status = ixgbe_clock_in_i2c_byte(hw, data);
1262 if (status != 0)
1263 goto fail;
1264
1265 status = ixgbe_clock_out_i2c_bit(hw, nack);
1266 if (status != 0)
1267 goto fail;
1268
1269 ixgbe_i2c_stop(hw);
1270 break;
1271
1272 fail:
1273 hw->mac.ops.release_swfw_sync(hw, swfw_mask);
1274 msleep(100);
1275 ixgbe_i2c_bus_clear(hw);
1276 retry++;
1277 if (retry < max_retry)
1278 hw_dbg(hw, "I2C byte read error - Retrying.\n");
1279 else
1280 hw_dbg(hw, "I2C byte read error.\n");
1281
1282 } while (retry < max_retry);
1283
1284 hw->mac.ops.release_swfw_sync(hw, swfw_mask);
1285
1286 read_byte_out:
1287 return status;
1288 }
1289
1290 /**
1291 * ixgbe_write_i2c_byte_generic - Writes 8 bit word over I2C
1292 * @hw: pointer to hardware structure
1293 * @byte_offset: byte offset to write
1294 * @data: value to write
1295 *
1296 * Performs byte write operation to SFP module's EEPROM over I2C interface at
1297 * a specified device address.
1298 **/
1299 s32 ixgbe_write_i2c_byte_generic(struct ixgbe_hw *hw, u8 byte_offset,
1300 u8 dev_addr, u8 data)
1301 {
1302 s32 status = 0;
1303 u32 max_retry = 1;
1304 u32 retry = 0;
1305 u16 swfw_mask = 0;
1306
1307 if (IXGBE_READ_REG(hw, IXGBE_STATUS) & IXGBE_STATUS_LAN_ID_1)
1308 swfw_mask = IXGBE_GSSR_PHY1_SM;
1309 else
1310 swfw_mask = IXGBE_GSSR_PHY0_SM;
1311
1312 if (hw->mac.ops.acquire_swfw_sync(hw, swfw_mask) != 0) {
1313 status = IXGBE_ERR_SWFW_SYNC;
1314 goto write_byte_out;
1315 }
1316
1317 do {
1318 ixgbe_i2c_start(hw);
1319
1320 status = ixgbe_clock_out_i2c_byte(hw, dev_addr);
1321 if (status != 0)
1322 goto fail;
1323
1324 status = ixgbe_get_i2c_ack(hw);
1325 if (status != 0)
1326 goto fail;
1327
1328 status = ixgbe_clock_out_i2c_byte(hw, byte_offset);
1329 if (status != 0)
1330 goto fail;
1331
1332 status = ixgbe_get_i2c_ack(hw);
1333 if (status != 0)
1334 goto fail;
1335
1336 status = ixgbe_clock_out_i2c_byte(hw, data);
1337 if (status != 0)
1338 goto fail;
1339
1340 status = ixgbe_get_i2c_ack(hw);
1341 if (status != 0)
1342 goto fail;
1343
1344 ixgbe_i2c_stop(hw);
1345 break;
1346
1347 fail:
1348 ixgbe_i2c_bus_clear(hw);
1349 retry++;
1350 if (retry < max_retry)
1351 hw_dbg(hw, "I2C byte write error - Retrying.\n");
1352 else
1353 hw_dbg(hw, "I2C byte write error.\n");
1354 } while (retry < max_retry);
1355
1356 hw->mac.ops.release_swfw_sync(hw, swfw_mask);
1357
1358 write_byte_out:
1359 return status;
1360 }
1361
1362 /**
1363 * ixgbe_i2c_start - Sets I2C start condition
1364 * @hw: pointer to hardware structure
1365 *
1366 * Sets I2C start condition (High -> Low on SDA while SCL is High)
1367 **/
1368 static void ixgbe_i2c_start(struct ixgbe_hw *hw)
1369 {
1370 u32 i2cctl = IXGBE_READ_REG(hw, IXGBE_I2CCTL);
1371
1372 /* Start condition must begin with data and clock high */
1373 ixgbe_set_i2c_data(hw, &i2cctl, 1);
1374 ixgbe_raise_i2c_clk(hw, &i2cctl);
1375
1376 /* Setup time for start condition (4.7us) */
1377 udelay(IXGBE_I2C_T_SU_STA);
1378
1379 ixgbe_set_i2c_data(hw, &i2cctl, 0);
1380
1381 /* Hold time for start condition (4us) */
1382 udelay(IXGBE_I2C_T_HD_STA);
1383
1384 ixgbe_lower_i2c_clk(hw, &i2cctl);
1385
1386 /* Minimum low period of clock is 4.7 us */
1387 udelay(IXGBE_I2C_T_LOW);
1388
1389 }
1390
1391 /**
1392 * ixgbe_i2c_stop - Sets I2C stop condition
1393 * @hw: pointer to hardware structure
1394 *
1395 * Sets I2C stop condition (Low -> High on SDA while SCL is High)
1396 **/
1397 static void ixgbe_i2c_stop(struct ixgbe_hw *hw)
1398 {
1399 u32 i2cctl = IXGBE_READ_REG(hw, IXGBE_I2CCTL);
1400
1401 /* Stop condition must begin with data low and clock high */
1402 ixgbe_set_i2c_data(hw, &i2cctl, 0);
1403 ixgbe_raise_i2c_clk(hw, &i2cctl);
1404
1405 /* Setup time for stop condition (4us) */
1406 udelay(IXGBE_I2C_T_SU_STO);
1407
1408 ixgbe_set_i2c_data(hw, &i2cctl, 1);
1409
1410 /* bus free time between stop and start (4.7us)*/
1411 udelay(IXGBE_I2C_T_BUF);
1412 }
1413
1414 /**
1415 * ixgbe_clock_in_i2c_byte - Clocks in one byte via I2C
1416 * @hw: pointer to hardware structure
1417 * @data: data byte to clock in
1418 *
1419 * Clocks in one byte data via I2C data/clock
1420 **/
1421 static s32 ixgbe_clock_in_i2c_byte(struct ixgbe_hw *hw, u8 *data)
1422 {
1423 s32 status = 0;
1424 s32 i;
1425 bool bit = 0;
1426
1427 for (i = 7; i >= 0; i--) {
1428 status = ixgbe_clock_in_i2c_bit(hw, &bit);
1429 *data |= bit << i;
1430
1431 if (status != 0)
1432 break;
1433 }
1434
1435 return status;
1436 }
1437
1438 /**
1439 * ixgbe_clock_out_i2c_byte - Clocks out one byte via I2C
1440 * @hw: pointer to hardware structure
1441 * @data: data byte clocked out
1442 *
1443 * Clocks out one byte data via I2C data/clock
1444 **/
1445 static s32 ixgbe_clock_out_i2c_byte(struct ixgbe_hw *hw, u8 data)
1446 {
1447 s32 status = 0;
1448 s32 i;
1449 u32 i2cctl;
1450 bool bit = 0;
1451
1452 for (i = 7; i >= 0; i--) {
1453 bit = (data >> i) & 0x1;
1454 status = ixgbe_clock_out_i2c_bit(hw, bit);
1455
1456 if (status != 0)
1457 break;
1458 }
1459
1460 /* Release SDA line (set high) */
1461 i2cctl = IXGBE_READ_REG(hw, IXGBE_I2CCTL);
1462 i2cctl |= IXGBE_I2C_DATA_OUT;
1463 IXGBE_WRITE_REG(hw, IXGBE_I2CCTL, i2cctl);
1464
1465 return status;
1466 }
1467
1468 /**
1469 * ixgbe_get_i2c_ack - Polls for I2C ACK
1470 * @hw: pointer to hardware structure
1471 *
1472 * Clocks in/out one bit via I2C data/clock
1473 **/
1474 static s32 ixgbe_get_i2c_ack(struct ixgbe_hw *hw)
1475 {
1476 s32 status;
1477 u32 i = 0;
1478 u32 i2cctl = IXGBE_READ_REG(hw, IXGBE_I2CCTL);
1479 u32 timeout = 10;
1480 bool ack = 1;
1481
1482 status = ixgbe_raise_i2c_clk(hw, &i2cctl);
1483
1484 if (status != 0)
1485 goto out;
1486
1487 /* Minimum high period of clock is 4us */
1488 udelay(IXGBE_I2C_T_HIGH);
1489
1490 /* Poll for ACK. Note that ACK in I2C spec is
1491 * transition from 1 to 0 */
1492 for (i = 0; i < timeout; i++) {
1493 i2cctl = IXGBE_READ_REG(hw, IXGBE_I2CCTL);
1494 ack = ixgbe_get_i2c_data(&i2cctl);
1495
1496 udelay(1);
1497 if (ack == 0)
1498 break;
1499 }
1500
1501 if (ack == 1) {
1502 hw_dbg(hw, "I2C ack was not received.\n");
1503 status = IXGBE_ERR_I2C;
1504 }
1505
1506 ixgbe_lower_i2c_clk(hw, &i2cctl);
1507
1508 /* Minimum low period of clock is 4.7 us */
1509 udelay(IXGBE_I2C_T_LOW);
1510
1511 out:
1512 return status;
1513 }
1514
1515 /**
1516 * ixgbe_clock_in_i2c_bit - Clocks in one bit via I2C data/clock
1517 * @hw: pointer to hardware structure
1518 * @data: read data value
1519 *
1520 * Clocks in one bit via I2C data/clock
1521 **/
1522 static s32 ixgbe_clock_in_i2c_bit(struct ixgbe_hw *hw, bool *data)
1523 {
1524 s32 status;
1525 u32 i2cctl = IXGBE_READ_REG(hw, IXGBE_I2CCTL);
1526
1527 status = ixgbe_raise_i2c_clk(hw, &i2cctl);
1528
1529 /* Minimum high period of clock is 4us */
1530 udelay(IXGBE_I2C_T_HIGH);
1531
1532 i2cctl = IXGBE_READ_REG(hw, IXGBE_I2CCTL);
1533 *data = ixgbe_get_i2c_data(&i2cctl);
1534
1535 ixgbe_lower_i2c_clk(hw, &i2cctl);
1536
1537 /* Minimum low period of clock is 4.7 us */
1538 udelay(IXGBE_I2C_T_LOW);
1539
1540 return status;
1541 }
1542
1543 /**
1544 * ixgbe_clock_out_i2c_bit - Clocks in/out one bit via I2C data/clock
1545 * @hw: pointer to hardware structure
1546 * @data: data value to write
1547 *
1548 * Clocks out one bit via I2C data/clock
1549 **/
1550 static s32 ixgbe_clock_out_i2c_bit(struct ixgbe_hw *hw, bool data)
1551 {
1552 s32 status;
1553 u32 i2cctl = IXGBE_READ_REG(hw, IXGBE_I2CCTL);
1554
1555 status = ixgbe_set_i2c_data(hw, &i2cctl, data);
1556 if (status == 0) {
1557 status = ixgbe_raise_i2c_clk(hw, &i2cctl);
1558
1559 /* Minimum high period of clock is 4us */
1560 udelay(IXGBE_I2C_T_HIGH);
1561
1562 ixgbe_lower_i2c_clk(hw, &i2cctl);
1563
1564 /* Minimum low period of clock is 4.7 us.
1565 * This also takes care of the data hold time.
1566 */
1567 udelay(IXGBE_I2C_T_LOW);
1568 } else {
1569 status = IXGBE_ERR_I2C;
1570 hw_dbg(hw, "I2C data was not set to %X\n", data);
1571 }
1572
1573 return status;
1574 }
1575 /**
1576 * ixgbe_raise_i2c_clk - Raises the I2C SCL clock
1577 * @hw: pointer to hardware structure
1578 * @i2cctl: Current value of I2CCTL register
1579 *
1580 * Raises the I2C clock line '0'->'1'
1581 **/
1582 static s32 ixgbe_raise_i2c_clk(struct ixgbe_hw *hw, u32 *i2cctl)
1583 {
1584 s32 status = 0;
1585
1586 *i2cctl |= IXGBE_I2C_CLK_OUT;
1587
1588 IXGBE_WRITE_REG(hw, IXGBE_I2CCTL, *i2cctl);
1589 IXGBE_WRITE_FLUSH(hw);
1590
1591 /* SCL rise time (1000ns) */
1592 udelay(IXGBE_I2C_T_RISE);
1593
1594 return status;
1595 }
1596
1597 /**
1598 * ixgbe_lower_i2c_clk - Lowers the I2C SCL clock
1599 * @hw: pointer to hardware structure
1600 * @i2cctl: Current value of I2CCTL register
1601 *
1602 * Lowers the I2C clock line '1'->'0'
1603 **/
1604 static void ixgbe_lower_i2c_clk(struct ixgbe_hw *hw, u32 *i2cctl)
1605 {
1606
1607 *i2cctl &= ~IXGBE_I2C_CLK_OUT;
1608
1609 IXGBE_WRITE_REG(hw, IXGBE_I2CCTL, *i2cctl);
1610 IXGBE_WRITE_FLUSH(hw);
1611
1612 /* SCL fall time (300ns) */
1613 udelay(IXGBE_I2C_T_FALL);
1614 }
1615
1616 /**
1617 * ixgbe_set_i2c_data - Sets the I2C data bit
1618 * @hw: pointer to hardware structure
1619 * @i2cctl: Current value of I2CCTL register
1620 * @data: I2C data value (0 or 1) to set
1621 *
1622 * Sets the I2C data bit
1623 **/
1624 static s32 ixgbe_set_i2c_data(struct ixgbe_hw *hw, u32 *i2cctl, bool data)
1625 {
1626 s32 status = 0;
1627
1628 if (data)
1629 *i2cctl |= IXGBE_I2C_DATA_OUT;
1630 else
1631 *i2cctl &= ~IXGBE_I2C_DATA_OUT;
1632
1633 IXGBE_WRITE_REG(hw, IXGBE_I2CCTL, *i2cctl);
1634 IXGBE_WRITE_FLUSH(hw);
1635
1636 /* Data rise/fall (1000ns/300ns) and set-up time (250ns) */
1637 udelay(IXGBE_I2C_T_RISE + IXGBE_I2C_T_FALL + IXGBE_I2C_T_SU_DATA);
1638
1639 /* Verify data was set correctly */
1640 *i2cctl = IXGBE_READ_REG(hw, IXGBE_I2CCTL);
1641 if (data != ixgbe_get_i2c_data(i2cctl)) {
1642 status = IXGBE_ERR_I2C;
1643 hw_dbg(hw, "Error - I2C data was not set to %X.\n", data);
1644 }
1645
1646 return status;
1647 }
1648
1649 /**
1650 * ixgbe_get_i2c_data - Reads the I2C SDA data bit
1651 * @hw: pointer to hardware structure
1652 * @i2cctl: Current value of I2CCTL register
1653 *
1654 * Returns the I2C data bit value
1655 **/
1656 static bool ixgbe_get_i2c_data(u32 *i2cctl)
1657 {
1658 bool data;
1659
1660 if (*i2cctl & IXGBE_I2C_DATA_IN)
1661 data = 1;
1662 else
1663 data = 0;
1664
1665 return data;
1666 }
1667
1668 /**
1669 * ixgbe_i2c_bus_clear - Clears the I2C bus
1670 * @hw: pointer to hardware structure
1671 *
1672 * Clears the I2C bus by sending nine clock pulses.
1673 * Used when data line is stuck low.
1674 **/
1675 static void ixgbe_i2c_bus_clear(struct ixgbe_hw *hw)
1676 {
1677 u32 i2cctl = IXGBE_READ_REG(hw, IXGBE_I2CCTL);
1678 u32 i;
1679
1680 ixgbe_i2c_start(hw);
1681
1682 ixgbe_set_i2c_data(hw, &i2cctl, 1);
1683
1684 for (i = 0; i < 9; i++) {
1685 ixgbe_raise_i2c_clk(hw, &i2cctl);
1686
1687 /* Min high period of clock is 4us */
1688 udelay(IXGBE_I2C_T_HIGH);
1689
1690 ixgbe_lower_i2c_clk(hw, &i2cctl);
1691
1692 /* Min low period of clock is 4.7us*/
1693 udelay(IXGBE_I2C_T_LOW);
1694 }
1695
1696 ixgbe_i2c_start(hw);
1697
1698 /* Put the i2c bus back to default state */
1699 ixgbe_i2c_stop(hw);
1700 }
1701
1702 /**
1703 * ixgbe_tn_check_overtemp - Checks if an overtemp occurred.
1704 * @hw: pointer to hardware structure
1705 *
1706 * Checks if the LASI temp alarm status was triggered due to overtemp
1707 **/
1708 s32 ixgbe_tn_check_overtemp(struct ixgbe_hw *hw)
1709 {
1710 s32 status = 0;
1711 u16 phy_data = 0;
1712
1713 if (hw->device_id != IXGBE_DEV_ID_82599_T3_LOM)
1714 goto out;
1715
1716 /* Check that the LASI temp alarm status was triggered */
1717 hw->phy.ops.read_reg(hw, IXGBE_TN_LASI_STATUS_REG,
1718 MDIO_MMD_PMAPMD, &phy_data);
1719
1720 if (!(phy_data & IXGBE_TN_LASI_STATUS_TEMP_ALARM))
1721 goto out;
1722
1723 status = IXGBE_ERR_OVERTEMP;
1724 out:
1725 return status;
1726 }
Linux kernel - Deliverables
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