1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright(c) 1999 - 2018 Intel Corporation. */
3 
4 #include "e1000.h"
5 
6 static s32 e1000_wait_autoneg(struct e1000_hw *hw);
7 static s32 e1000_access_phy_wakeup_reg_bm(struct e1000_hw *hw, u32 offset,
8 					  u16 *data, bool read, bool page_set);
9 static u32 e1000_get_phy_addr_for_hv_page(u32 page);
10 static s32 e1000_access_phy_debug_regs_hv(struct e1000_hw *hw, u32 offset,
11 					  u16 *data, bool read);
12 
13 /* Cable length tables */
14 static const u16 e1000_m88_cable_length_table[] = {
15 	0, 50, 80, 110, 140, 140, E1000_CABLE_LENGTH_UNDEFINED
16 };
17 
18 #define M88E1000_CABLE_LENGTH_TABLE_SIZE \
19 		ARRAY_SIZE(e1000_m88_cable_length_table)
20 
21 static const u16 e1000_igp_2_cable_length_table[] = {
22 	0, 0, 0, 0, 0, 0, 0, 0, 3, 5, 8, 11, 13, 16, 18, 21, 0, 0, 0, 3,
23 	6, 10, 13, 16, 19, 23, 26, 29, 32, 35, 38, 41, 6, 10, 14, 18, 22,
24 	26, 30, 33, 37, 41, 44, 48, 51, 54, 58, 61, 21, 26, 31, 35, 40,
25 	44, 49, 53, 57, 61, 65, 68, 72, 75, 79, 82, 40, 45, 51, 56, 61,
26 	66, 70, 75, 79, 83, 87, 91, 94, 98, 101, 104, 60, 66, 72, 77, 82,
27 	87, 92, 96, 100, 104, 108, 111, 114, 117, 119, 121, 83, 89, 95,
28 	100, 105, 109, 113, 116, 119, 122, 124, 104, 109, 114, 118, 121,
29 	124
30 };
31 
32 #define IGP02E1000_CABLE_LENGTH_TABLE_SIZE \
33 		ARRAY_SIZE(e1000_igp_2_cable_length_table)
34 
35 /**
36  *  e1000e_check_reset_block_generic - Check if PHY reset is blocked
37  *  @hw: pointer to the HW structure
38  *
39  *  Read the PHY management control register and check whether a PHY reset
40  *  is blocked.  If a reset is not blocked return 0, otherwise
41  *  return E1000_BLK_PHY_RESET (12).
42  **/
43 s32 e1000e_check_reset_block_generic(struct e1000_hw *hw)
44 {
45 	u32 manc;
46 
47 	manc = er32(MANC);
48 
49 	return (manc & E1000_MANC_BLK_PHY_RST_ON_IDE) ? E1000_BLK_PHY_RESET : 0;
50 }
51 
52 /**
53  *  e1000e_get_phy_id - Retrieve the PHY ID and revision
54  *  @hw: pointer to the HW structure
55  *
56  *  Reads the PHY registers and stores the PHY ID and possibly the PHY
57  *  revision in the hardware structure.
58  **/
59 s32 e1000e_get_phy_id(struct e1000_hw *hw)
60 {
61 	struct e1000_phy_info *phy = &hw->phy;
62 	s32 ret_val = 0;
63 	u16 phy_id;
64 	u16 retry_count = 0;
65 
66 	if (!phy->ops.read_reg)
67 		return 0;
68 
69 	while (retry_count < 2) {
70 		ret_val = e1e_rphy(hw, MII_PHYSID1, &phy_id);
71 		if (ret_val)
72 			return ret_val;
73 
74 		phy->id = (u32)(phy_id << 16);
75 		usleep_range(20, 40);
76 		ret_val = e1e_rphy(hw, MII_PHYSID2, &phy_id);
77 		if (ret_val)
78 			return ret_val;
79 
80 		phy->id |= (u32)(phy_id & PHY_REVISION_MASK);
81 		phy->revision = (u32)(phy_id & ~PHY_REVISION_MASK);
82 
83 		if (phy->id != 0 && phy->id != PHY_REVISION_MASK)
84 			return 0;
85 
86 		retry_count++;
87 	}
88 
89 	return 0;
90 }
91 
92 /**
93  *  e1000e_phy_reset_dsp - Reset PHY DSP
94  *  @hw: pointer to the HW structure
95  *
96  *  Reset the digital signal processor.
97  **/
98 s32 e1000e_phy_reset_dsp(struct e1000_hw *hw)
99 {
100 	s32 ret_val;
101 
102 	ret_val = e1e_wphy(hw, M88E1000_PHY_GEN_CONTROL, 0xC1);
103 	if (ret_val)
104 		return ret_val;
105 
106 	return e1e_wphy(hw, M88E1000_PHY_GEN_CONTROL, 0);
107 }
108 
109 /**
110  *  e1000e_read_phy_reg_mdic - Read MDI control register
111  *  @hw: pointer to the HW structure
112  *  @offset: register offset to be read
113  *  @data: pointer to the read data
114  *
115  *  Reads the MDI control register in the PHY at offset and stores the
116  *  information read to data.
117  **/
118 s32 e1000e_read_phy_reg_mdic(struct e1000_hw *hw, u32 offset, u16 *data)
119 {
120 	struct e1000_phy_info *phy = &hw->phy;
121 	u32 i, mdic = 0;
122 
123 	if (offset > MAX_PHY_REG_ADDRESS) {
124 		e_dbg("PHY Address %d is out of range\n", offset);
125 		return -E1000_ERR_PARAM;
126 	}
127 
128 	/* Set up Op-code, Phy Address, and register offset in the MDI
129 	 * Control register.  The MAC will take care of interfacing with the
130 	 * PHY to retrieve the desired data.
131 	 */
132 	mdic = ((offset << E1000_MDIC_REG_SHIFT) |
133 		(phy->addr << E1000_MDIC_PHY_SHIFT) |
134 		(E1000_MDIC_OP_READ));
135 
136 	ew32(MDIC, mdic);
137 
138 	/* Poll the ready bit to see if the MDI read completed
139 	 * Increasing the time out as testing showed failures with
140 	 * the lower time out
141 	 */
142 	for (i = 0; i < (E1000_GEN_POLL_TIMEOUT * 3); i++) {
143 		udelay(50);
144 		mdic = er32(MDIC);
145 		if (mdic & E1000_MDIC_READY)
146 			break;
147 	}
148 	if (!(mdic & E1000_MDIC_READY)) {
149 		e_dbg("MDI Read did not complete\n");
150 		return -E1000_ERR_PHY;
151 	}
152 	if (mdic & E1000_MDIC_ERROR) {
153 		e_dbg("MDI Error\n");
154 		return -E1000_ERR_PHY;
155 	}
156 	if (((mdic & E1000_MDIC_REG_MASK) >> E1000_MDIC_REG_SHIFT) != offset) {
157 		e_dbg("MDI Read offset error - requested %d, returned %d\n",
158 		      offset,
159 		      (mdic & E1000_MDIC_REG_MASK) >> E1000_MDIC_REG_SHIFT);
160 		return -E1000_ERR_PHY;
161 	}
162 	*data = (u16)mdic;
163 
164 	/* Allow some time after each MDIC transaction to avoid
165 	 * reading duplicate data in the next MDIC transaction.
166 	 */
167 	if (hw->mac.type == e1000_pch2lan)
168 		udelay(100);
169 
170 	return 0;
171 }
172 
173 /**
174  *  e1000e_write_phy_reg_mdic - Write MDI control register
175  *  @hw: pointer to the HW structure
176  *  @offset: register offset to write to
177  *  @data: data to write to register at offset
178  *
179  *  Writes data to MDI control register in the PHY at offset.
180  **/
181 s32 e1000e_write_phy_reg_mdic(struct e1000_hw *hw, u32 offset, u16 data)
182 {
183 	struct e1000_phy_info *phy = &hw->phy;
184 	u32 i, mdic = 0;
185 
186 	if (offset > MAX_PHY_REG_ADDRESS) {
187 		e_dbg("PHY Address %d is out of range\n", offset);
188 		return -E1000_ERR_PARAM;
189 	}
190 
191 	/* Set up Op-code, Phy Address, and register offset in the MDI
192 	 * Control register.  The MAC will take care of interfacing with the
193 	 * PHY to retrieve the desired data.
194 	 */
195 	mdic = (((u32)data) |
196 		(offset << E1000_MDIC_REG_SHIFT) |
197 		(phy->addr << E1000_MDIC_PHY_SHIFT) |
198 		(E1000_MDIC_OP_WRITE));
199 
200 	ew32(MDIC, mdic);
201 
202 	/* Poll the ready bit to see if the MDI read completed
203 	 * Increasing the time out as testing showed failures with
204 	 * the lower time out
205 	 */
206 	for (i = 0; i < (E1000_GEN_POLL_TIMEOUT * 3); i++) {
207 		udelay(50);
208 		mdic = er32(MDIC);
209 		if (mdic & E1000_MDIC_READY)
210 			break;
211 	}
212 	if (!(mdic & E1000_MDIC_READY)) {
213 		e_dbg("MDI Write did not complete\n");
214 		return -E1000_ERR_PHY;
215 	}
216 	if (mdic & E1000_MDIC_ERROR) {
217 		e_dbg("MDI Error\n");
218 		return -E1000_ERR_PHY;
219 	}
220 	if (((mdic & E1000_MDIC_REG_MASK) >> E1000_MDIC_REG_SHIFT) != offset) {
221 		e_dbg("MDI Write offset error - requested %d, returned %d\n",
222 		      offset,
223 		      (mdic & E1000_MDIC_REG_MASK) >> E1000_MDIC_REG_SHIFT);
224 		return -E1000_ERR_PHY;
225 	}
226 
227 	/* Allow some time after each MDIC transaction to avoid
228 	 * reading duplicate data in the next MDIC transaction.
229 	 */
230 	if (hw->mac.type == e1000_pch2lan)
231 		udelay(100);
232 
233 	return 0;
234 }
235 
236 /**
237  *  e1000e_read_phy_reg_m88 - Read m88 PHY register
238  *  @hw: pointer to the HW structure
239  *  @offset: register offset to be read
240  *  @data: pointer to the read data
241  *
242  *  Acquires semaphore, if necessary, then reads the PHY register at offset
243  *  and storing the retrieved information in data.  Release any acquired
244  *  semaphores before exiting.
245  **/
246 s32 e1000e_read_phy_reg_m88(struct e1000_hw *hw, u32 offset, u16 *data)
247 {
248 	s32 ret_val;
249 
250 	ret_val = hw->phy.ops.acquire(hw);
251 	if (ret_val)
252 		return ret_val;
253 
254 	ret_val = e1000e_read_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & offset,
255 					   data);
256 
257 	hw->phy.ops.release(hw);
258 
259 	return ret_val;
260 }
261 
262 /**
263  *  e1000e_write_phy_reg_m88 - Write m88 PHY register
264  *  @hw: pointer to the HW structure
265  *  @offset: register offset to write to
266  *  @data: data to write at register offset
267  *
268  *  Acquires semaphore, if necessary, then writes the data to PHY register
269  *  at the offset.  Release any acquired semaphores before exiting.
270  **/
271 s32 e1000e_write_phy_reg_m88(struct e1000_hw *hw, u32 offset, u16 data)
272 {
273 	s32 ret_val;
274 
275 	ret_val = hw->phy.ops.acquire(hw);
276 	if (ret_val)
277 		return ret_val;
278 
279 	ret_val = e1000e_write_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & offset,
280 					    data);
281 
282 	hw->phy.ops.release(hw);
283 
284 	return ret_val;
285 }
286 
287 /**
288  *  e1000_set_page_igp - Set page as on IGP-like PHY(s)
289  *  @hw: pointer to the HW structure
290  *  @page: page to set (shifted left when necessary)
291  *
292  *  Sets PHY page required for PHY register access.  Assumes semaphore is
293  *  already acquired.  Note, this function sets phy.addr to 1 so the caller
294  *  must set it appropriately (if necessary) after this function returns.
295  **/
296 s32 e1000_set_page_igp(struct e1000_hw *hw, u16 page)
297 {
298 	e_dbg("Setting page 0x%x\n", page);
299 
300 	hw->phy.addr = 1;
301 
302 	return e1000e_write_phy_reg_mdic(hw, IGP01E1000_PHY_PAGE_SELECT, page);
303 }
304 
305 /**
306  *  __e1000e_read_phy_reg_igp - Read igp PHY register
307  *  @hw: pointer to the HW structure
308  *  @offset: register offset to be read
309  *  @data: pointer to the read data
310  *  @locked: semaphore has already been acquired or not
311  *
312  *  Acquires semaphore, if necessary, then reads the PHY register at offset
313  *  and stores the retrieved information in data.  Release any acquired
314  *  semaphores before exiting.
315  **/
316 static s32 __e1000e_read_phy_reg_igp(struct e1000_hw *hw, u32 offset, u16 *data,
317 				     bool locked)
318 {
319 	s32 ret_val = 0;
320 
321 	if (!locked) {
322 		if (!hw->phy.ops.acquire)
323 			return 0;
324 
325 		ret_val = hw->phy.ops.acquire(hw);
326 		if (ret_val)
327 			return ret_val;
328 	}
329 
330 	if (offset > MAX_PHY_MULTI_PAGE_REG)
331 		ret_val = e1000e_write_phy_reg_mdic(hw,
332 						    IGP01E1000_PHY_PAGE_SELECT,
333 						    (u16)offset);
334 	if (!ret_val)
335 		ret_val = e1000e_read_phy_reg_mdic(hw,
336 						   MAX_PHY_REG_ADDRESS & offset,
337 						   data);
338 	if (!locked)
339 		hw->phy.ops.release(hw);
340 
341 	return ret_val;
342 }
343 
344 /**
345  *  e1000e_read_phy_reg_igp - Read igp PHY register
346  *  @hw: pointer to the HW structure
347  *  @offset: register offset to be read
348  *  @data: pointer to the read data
349  *
350  *  Acquires semaphore then reads the PHY register at offset and stores the
351  *  retrieved information in data.
352  *  Release the acquired semaphore before exiting.
353  **/
354 s32 e1000e_read_phy_reg_igp(struct e1000_hw *hw, u32 offset, u16 *data)
355 {
356 	return __e1000e_read_phy_reg_igp(hw, offset, data, false);
357 }
358 
359 /**
360  *  e1000e_read_phy_reg_igp_locked - Read igp PHY register
361  *  @hw: pointer to the HW structure
362  *  @offset: register offset to be read
363  *  @data: pointer to the read data
364  *
365  *  Reads the PHY register at offset and stores the retrieved information
366  *  in data.  Assumes semaphore already acquired.
367  **/
368 s32 e1000e_read_phy_reg_igp_locked(struct e1000_hw *hw, u32 offset, u16 *data)
369 {
370 	return __e1000e_read_phy_reg_igp(hw, offset, data, true);
371 }
372 
373 /**
374  *  __e1000e_write_phy_reg_igp - Write igp PHY register
375  *  @hw: pointer to the HW structure
376  *  @offset: register offset to write to
377  *  @data: data to write at register offset
378  *  @locked: semaphore has already been acquired or not
379  *
380  *  Acquires semaphore, if necessary, then writes the data to PHY register
381  *  at the offset.  Release any acquired semaphores before exiting.
382  **/
383 static s32 __e1000e_write_phy_reg_igp(struct e1000_hw *hw, u32 offset, u16 data,
384 				      bool locked)
385 {
386 	s32 ret_val = 0;
387 
388 	if (!locked) {
389 		if (!hw->phy.ops.acquire)
390 			return 0;
391 
392 		ret_val = hw->phy.ops.acquire(hw);
393 		if (ret_val)
394 			return ret_val;
395 	}
396 
397 	if (offset > MAX_PHY_MULTI_PAGE_REG)
398 		ret_val = e1000e_write_phy_reg_mdic(hw,
399 						    IGP01E1000_PHY_PAGE_SELECT,
400 						    (u16)offset);
401 	if (!ret_val)
402 		ret_val = e1000e_write_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS &
403 						    offset, data);
404 	if (!locked)
405 		hw->phy.ops.release(hw);
406 
407 	return ret_val;
408 }
409 
410 /**
411  *  e1000e_write_phy_reg_igp - Write igp PHY register
412  *  @hw: pointer to the HW structure
413  *  @offset: register offset to write to
414  *  @data: data to write at register offset
415  *
416  *  Acquires semaphore then writes the data to PHY register
417  *  at the offset.  Release any acquired semaphores before exiting.
418  **/
419 s32 e1000e_write_phy_reg_igp(struct e1000_hw *hw, u32 offset, u16 data)
420 {
421 	return __e1000e_write_phy_reg_igp(hw, offset, data, false);
422 }
423 
424 /**
425  *  e1000e_write_phy_reg_igp_locked - Write igp PHY register
426  *  @hw: pointer to the HW structure
427  *  @offset: register offset to write to
428  *  @data: data to write at register offset
429  *
430  *  Writes the data to PHY register at the offset.
431  *  Assumes semaphore already acquired.
432  **/
433 s32 e1000e_write_phy_reg_igp_locked(struct e1000_hw *hw, u32 offset, u16 data)
434 {
435 	return __e1000e_write_phy_reg_igp(hw, offset, data, true);
436 }
437 
438 /**
439  *  __e1000_read_kmrn_reg - Read kumeran register
440  *  @hw: pointer to the HW structure
441  *  @offset: register offset to be read
442  *  @data: pointer to the read data
443  *  @locked: semaphore has already been acquired or not
444  *
445  *  Acquires semaphore, if necessary.  Then reads the PHY register at offset
446  *  using the kumeran interface.  The information retrieved is stored in data.
447  *  Release any acquired semaphores before exiting.
448  **/
449 static s32 __e1000_read_kmrn_reg(struct e1000_hw *hw, u32 offset, u16 *data,
450 				 bool locked)
451 {
452 	u32 kmrnctrlsta;
453 
454 	if (!locked) {
455 		s32 ret_val = 0;
456 
457 		if (!hw->phy.ops.acquire)
458 			return 0;
459 
460 		ret_val = hw->phy.ops.acquire(hw);
461 		if (ret_val)
462 			return ret_val;
463 	}
464 
465 	kmrnctrlsta = ((offset << E1000_KMRNCTRLSTA_OFFSET_SHIFT) &
466 		       E1000_KMRNCTRLSTA_OFFSET) | E1000_KMRNCTRLSTA_REN;
467 	ew32(KMRNCTRLSTA, kmrnctrlsta);
468 	e1e_flush();
469 
470 	udelay(2);
471 
472 	kmrnctrlsta = er32(KMRNCTRLSTA);
473 	*data = (u16)kmrnctrlsta;
474 
475 	if (!locked)
476 		hw->phy.ops.release(hw);
477 
478 	return 0;
479 }
480 
481 /**
482  *  e1000e_read_kmrn_reg -  Read kumeran register
483  *  @hw: pointer to the HW structure
484  *  @offset: register offset to be read
485  *  @data: pointer to the read data
486  *
487  *  Acquires semaphore then reads the PHY register at offset using the
488  *  kumeran interface.  The information retrieved is stored in data.
489  *  Release the acquired semaphore before exiting.
490  **/
491 s32 e1000e_read_kmrn_reg(struct e1000_hw *hw, u32 offset, u16 *data)
492 {
493 	return __e1000_read_kmrn_reg(hw, offset, data, false);
494 }
495 
496 /**
497  *  e1000e_read_kmrn_reg_locked -  Read kumeran register
498  *  @hw: pointer to the HW structure
499  *  @offset: register offset to be read
500  *  @data: pointer to the read data
501  *
502  *  Reads the PHY register at offset using the kumeran interface.  The
503  *  information retrieved is stored in data.
504  *  Assumes semaphore already acquired.
505  **/
506 s32 e1000e_read_kmrn_reg_locked(struct e1000_hw *hw, u32 offset, u16 *data)
507 {
508 	return __e1000_read_kmrn_reg(hw, offset, data, true);
509 }
510 
511 /**
512  *  __e1000_write_kmrn_reg - Write kumeran register
513  *  @hw: pointer to the HW structure
514  *  @offset: register offset to write to
515  *  @data: data to write at register offset
516  *  @locked: semaphore has already been acquired or not
517  *
518  *  Acquires semaphore, if necessary.  Then write the data to PHY register
519  *  at the offset using the kumeran interface.  Release any acquired semaphores
520  *  before exiting.
521  **/
522 static s32 __e1000_write_kmrn_reg(struct e1000_hw *hw, u32 offset, u16 data,
523 				  bool locked)
524 {
525 	u32 kmrnctrlsta;
526 
527 	if (!locked) {
528 		s32 ret_val = 0;
529 
530 		if (!hw->phy.ops.acquire)
531 			return 0;
532 
533 		ret_val = hw->phy.ops.acquire(hw);
534 		if (ret_val)
535 			return ret_val;
536 	}
537 
538 	kmrnctrlsta = ((offset << E1000_KMRNCTRLSTA_OFFSET_SHIFT) &
539 		       E1000_KMRNCTRLSTA_OFFSET) | data;
540 	ew32(KMRNCTRLSTA, kmrnctrlsta);
541 	e1e_flush();
542 
543 	udelay(2);
544 
545 	if (!locked)
546 		hw->phy.ops.release(hw);
547 
548 	return 0;
549 }
550 
551 /**
552  *  e1000e_write_kmrn_reg -  Write kumeran register
553  *  @hw: pointer to the HW structure
554  *  @offset: register offset to write to
555  *  @data: data to write at register offset
556  *
557  *  Acquires semaphore then writes the data to the PHY register at the offset
558  *  using the kumeran interface.  Release the acquired semaphore before exiting.
559  **/
560 s32 e1000e_write_kmrn_reg(struct e1000_hw *hw, u32 offset, u16 data)
561 {
562 	return __e1000_write_kmrn_reg(hw, offset, data, false);
563 }
564 
565 /**
566  *  e1000e_write_kmrn_reg_locked -  Write kumeran register
567  *  @hw: pointer to the HW structure
568  *  @offset: register offset to write to
569  *  @data: data to write at register offset
570  *
571  *  Write the data to PHY register at the offset using the kumeran interface.
572  *  Assumes semaphore already acquired.
573  **/
574 s32 e1000e_write_kmrn_reg_locked(struct e1000_hw *hw, u32 offset, u16 data)
575 {
576 	return __e1000_write_kmrn_reg(hw, offset, data, true);
577 }
578 
579 /**
580  *  e1000_set_master_slave_mode - Setup PHY for Master/slave mode
581  *  @hw: pointer to the HW structure
582  *
583  *  Sets up Master/slave mode
584  **/
585 static s32 e1000_set_master_slave_mode(struct e1000_hw *hw)
586 {
587 	s32 ret_val;
588 	u16 phy_data;
589 
590 	/* Resolve Master/Slave mode */
591 	ret_val = e1e_rphy(hw, MII_CTRL1000, &phy_data);
592 	if (ret_val)
593 		return ret_val;
594 
595 	/* load defaults for future use */
596 	hw->phy.original_ms_type = (phy_data & CTL1000_ENABLE_MASTER) ?
597 	    ((phy_data & CTL1000_AS_MASTER) ?
598 	     e1000_ms_force_master : e1000_ms_force_slave) : e1000_ms_auto;
599 
600 	switch (hw->phy.ms_type) {
601 	case e1000_ms_force_master:
602 		phy_data |= (CTL1000_ENABLE_MASTER | CTL1000_AS_MASTER);
603 		break;
604 	case e1000_ms_force_slave:
605 		phy_data |= CTL1000_ENABLE_MASTER;
606 		phy_data &= ~(CTL1000_AS_MASTER);
607 		break;
608 	case e1000_ms_auto:
609 		phy_data &= ~CTL1000_ENABLE_MASTER;
610 		fallthrough;
611 	default:
612 		break;
613 	}
614 
615 	return e1e_wphy(hw, MII_CTRL1000, phy_data);
616 }
617 
618 /**
619  *  e1000_copper_link_setup_82577 - Setup 82577 PHY for copper link
620  *  @hw: pointer to the HW structure
621  *
622  *  Sets up Carrier-sense on Transmit and downshift values.
623  **/
624 s32 e1000_copper_link_setup_82577(struct e1000_hw *hw)
625 {
626 	s32 ret_val;
627 	u16 phy_data;
628 
629 	/* Enable CRS on Tx. This must be set for half-duplex operation. */
630 	ret_val = e1e_rphy(hw, I82577_CFG_REG, &phy_data);
631 	if (ret_val)
632 		return ret_val;
633 
634 	phy_data |= I82577_CFG_ASSERT_CRS_ON_TX;
635 
636 	/* Enable downshift */
637 	phy_data |= I82577_CFG_ENABLE_DOWNSHIFT;
638 
639 	ret_val = e1e_wphy(hw, I82577_CFG_REG, phy_data);
640 	if (ret_val)
641 		return ret_val;
642 
643 	/* Set MDI/MDIX mode */
644 	ret_val = e1e_rphy(hw, I82577_PHY_CTRL_2, &phy_data);
645 	if (ret_val)
646 		return ret_val;
647 	phy_data &= ~I82577_PHY_CTRL2_MDIX_CFG_MASK;
648 	/* Options:
649 	 *   0 - Auto (default)
650 	 *   1 - MDI mode
651 	 *   2 - MDI-X mode
652 	 */
653 	switch (hw->phy.mdix) {
654 	case 1:
655 		break;
656 	case 2:
657 		phy_data |= I82577_PHY_CTRL2_MANUAL_MDIX;
658 		break;
659 	case 0:
660 	default:
661 		phy_data |= I82577_PHY_CTRL2_AUTO_MDI_MDIX;
662 		break;
663 	}
664 	ret_val = e1e_wphy(hw, I82577_PHY_CTRL_2, phy_data);
665 	if (ret_val)
666 		return ret_val;
667 
668 	return e1000_set_master_slave_mode(hw);
669 }
670 
671 /**
672  *  e1000e_copper_link_setup_m88 - Setup m88 PHY's for copper link
673  *  @hw: pointer to the HW structure
674  *
675  *  Sets up MDI/MDI-X and polarity for m88 PHY's.  If necessary, transmit clock
676  *  and downshift values are set also.
677  **/
678 s32 e1000e_copper_link_setup_m88(struct e1000_hw *hw)
679 {
680 	struct e1000_phy_info *phy = &hw->phy;
681 	s32 ret_val;
682 	u16 phy_data;
683 
684 	/* Enable CRS on Tx. This must be set for half-duplex operation. */
685 	ret_val = e1e_rphy(hw, M88E1000_PHY_SPEC_CTRL, &phy_data);
686 	if (ret_val)
687 		return ret_val;
688 
689 	/* For BM PHY this bit is downshift enable */
690 	if (phy->type != e1000_phy_bm)
691 		phy_data |= M88E1000_PSCR_ASSERT_CRS_ON_TX;
692 
693 	/* Options:
694 	 *   MDI/MDI-X = 0 (default)
695 	 *   0 - Auto for all speeds
696 	 *   1 - MDI mode
697 	 *   2 - MDI-X mode
698 	 *   3 - Auto for 1000Base-T only (MDI-X for 10/100Base-T modes)
699 	 */
700 	phy_data &= ~M88E1000_PSCR_AUTO_X_MODE;
701 
702 	switch (phy->mdix) {
703 	case 1:
704 		phy_data |= M88E1000_PSCR_MDI_MANUAL_MODE;
705 		break;
706 	case 2:
707 		phy_data |= M88E1000_PSCR_MDIX_MANUAL_MODE;
708 		break;
709 	case 3:
710 		phy_data |= M88E1000_PSCR_AUTO_X_1000T;
711 		break;
712 	case 0:
713 	default:
714 		phy_data |= M88E1000_PSCR_AUTO_X_MODE;
715 		break;
716 	}
717 
718 	/* Options:
719 	 *   disable_polarity_correction = 0 (default)
720 	 *       Automatic Correction for Reversed Cable Polarity
721 	 *   0 - Disabled
722 	 *   1 - Enabled
723 	 */
724 	phy_data &= ~M88E1000_PSCR_POLARITY_REVERSAL;
725 	if (phy->disable_polarity_correction)
726 		phy_data |= M88E1000_PSCR_POLARITY_REVERSAL;
727 
728 	/* Enable downshift on BM (disabled by default) */
729 	if (phy->type == e1000_phy_bm) {
730 		/* For 82574/82583, first disable then enable downshift */
731 		if (phy->id == BME1000_E_PHY_ID_R2) {
732 			phy_data &= ~BME1000_PSCR_ENABLE_DOWNSHIFT;
733 			ret_val = e1e_wphy(hw, M88E1000_PHY_SPEC_CTRL,
734 					   phy_data);
735 			if (ret_val)
736 				return ret_val;
737 			/* Commit the changes. */
738 			ret_val = phy->ops.commit(hw);
739 			if (ret_val) {
740 				e_dbg("Error committing the PHY changes\n");
741 				return ret_val;
742 			}
743 		}
744 
745 		phy_data |= BME1000_PSCR_ENABLE_DOWNSHIFT;
746 	}
747 
748 	ret_val = e1e_wphy(hw, M88E1000_PHY_SPEC_CTRL, phy_data);
749 	if (ret_val)
750 		return ret_val;
751 
752 	if ((phy->type == e1000_phy_m88) &&
753 	    (phy->revision < E1000_REVISION_4) &&
754 	    (phy->id != BME1000_E_PHY_ID_R2)) {
755 		/* Force TX_CLK in the Extended PHY Specific Control Register
756 		 * to 25MHz clock.
757 		 */
758 		ret_val = e1e_rphy(hw, M88E1000_EXT_PHY_SPEC_CTRL, &phy_data);
759 		if (ret_val)
760 			return ret_val;
761 
762 		phy_data |= M88E1000_EPSCR_TX_CLK_25;
763 
764 		if ((phy->revision == 2) && (phy->id == M88E1111_I_PHY_ID)) {
765 			/* 82573L PHY - set the downshift counter to 5x. */
766 			phy_data &= ~M88EC018_EPSCR_DOWNSHIFT_COUNTER_MASK;
767 			phy_data |= M88EC018_EPSCR_DOWNSHIFT_COUNTER_5X;
768 		} else {
769 			/* Configure Master and Slave downshift values */
770 			phy_data &= ~(M88E1000_EPSCR_MASTER_DOWNSHIFT_MASK |
771 				      M88E1000_EPSCR_SLAVE_DOWNSHIFT_MASK);
772 			phy_data |= (M88E1000_EPSCR_MASTER_DOWNSHIFT_1X |
773 				     M88E1000_EPSCR_SLAVE_DOWNSHIFT_1X);
774 		}
775 		ret_val = e1e_wphy(hw, M88E1000_EXT_PHY_SPEC_CTRL, phy_data);
776 		if (ret_val)
777 			return ret_val;
778 	}
779 
780 	if ((phy->type == e1000_phy_bm) && (phy->id == BME1000_E_PHY_ID_R2)) {
781 		/* Set PHY page 0, register 29 to 0x0003 */
782 		ret_val = e1e_wphy(hw, 29, 0x0003);
783 		if (ret_val)
784 			return ret_val;
785 
786 		/* Set PHY page 0, register 30 to 0x0000 */
787 		ret_val = e1e_wphy(hw, 30, 0x0000);
788 		if (ret_val)
789 			return ret_val;
790 	}
791 
792 	/* Commit the changes. */
793 	if (phy->ops.commit) {
794 		ret_val = phy->ops.commit(hw);
795 		if (ret_val) {
796 			e_dbg("Error committing the PHY changes\n");
797 			return ret_val;
798 		}
799 	}
800 
801 	if (phy->type == e1000_phy_82578) {
802 		ret_val = e1e_rphy(hw, M88E1000_EXT_PHY_SPEC_CTRL, &phy_data);
803 		if (ret_val)
804 			return ret_val;
805 
806 		/* 82578 PHY - set the downshift count to 1x. */
807 		phy_data |= I82578_EPSCR_DOWNSHIFT_ENABLE;
808 		phy_data &= ~I82578_EPSCR_DOWNSHIFT_COUNTER_MASK;
809 		ret_val = e1e_wphy(hw, M88E1000_EXT_PHY_SPEC_CTRL, phy_data);
810 		if (ret_val)
811 			return ret_val;
812 	}
813 
814 	return 0;
815 }
816 
817 /**
818  *  e1000e_copper_link_setup_igp - Setup igp PHY's for copper link
819  *  @hw: pointer to the HW structure
820  *
821  *  Sets up LPLU, MDI/MDI-X, polarity, Smartspeed and Master/Slave config for
822  *  igp PHY's.
823  **/
824 s32 e1000e_copper_link_setup_igp(struct e1000_hw *hw)
825 {
826 	struct e1000_phy_info *phy = &hw->phy;
827 	s32 ret_val;
828 	u16 data;
829 
830 	ret_val = e1000_phy_hw_reset(hw);
831 	if (ret_val) {
832 		e_dbg("Error resetting the PHY.\n");
833 		return ret_val;
834 	}
835 
836 	/* Wait 100ms for MAC to configure PHY from NVM settings, to avoid
837 	 * timeout issues when LFS is enabled.
838 	 */
839 	msleep(100);
840 
841 	/* disable lplu d0 during driver init */
842 	if (hw->phy.ops.set_d0_lplu_state) {
843 		ret_val = hw->phy.ops.set_d0_lplu_state(hw, false);
844 		if (ret_val) {
845 			e_dbg("Error Disabling LPLU D0\n");
846 			return ret_val;
847 		}
848 	}
849 	/* Configure mdi-mdix settings */
850 	ret_val = e1e_rphy(hw, IGP01E1000_PHY_PORT_CTRL, &data);
851 	if (ret_val)
852 		return ret_val;
853 
854 	data &= ~IGP01E1000_PSCR_AUTO_MDIX;
855 
856 	switch (phy->mdix) {
857 	case 1:
858 		data &= ~IGP01E1000_PSCR_FORCE_MDI_MDIX;
859 		break;
860 	case 2:
861 		data |= IGP01E1000_PSCR_FORCE_MDI_MDIX;
862 		break;
863 	case 0:
864 	default:
865 		data |= IGP01E1000_PSCR_AUTO_MDIX;
866 		break;
867 	}
868 	ret_val = e1e_wphy(hw, IGP01E1000_PHY_PORT_CTRL, data);
869 	if (ret_val)
870 		return ret_val;
871 
872 	/* set auto-master slave resolution settings */
873 	if (hw->mac.autoneg) {
874 		/* when autonegotiation advertisement is only 1000Mbps then we
875 		 * should disable SmartSpeed and enable Auto MasterSlave
876 		 * resolution as hardware default.
877 		 */
878 		if (phy->autoneg_advertised == ADVERTISE_1000_FULL) {
879 			/* Disable SmartSpeed */
880 			ret_val = e1e_rphy(hw, IGP01E1000_PHY_PORT_CONFIG,
881 					   &data);
882 			if (ret_val)
883 				return ret_val;
884 
885 			data &= ~IGP01E1000_PSCFR_SMART_SPEED;
886 			ret_val = e1e_wphy(hw, IGP01E1000_PHY_PORT_CONFIG,
887 					   data);
888 			if (ret_val)
889 				return ret_val;
890 
891 			/* Set auto Master/Slave resolution process */
892 			ret_val = e1e_rphy(hw, MII_CTRL1000, &data);
893 			if (ret_val)
894 				return ret_val;
895 
896 			data &= ~CTL1000_ENABLE_MASTER;
897 			ret_val = e1e_wphy(hw, MII_CTRL1000, data);
898 			if (ret_val)
899 				return ret_val;
900 		}
901 
902 		ret_val = e1000_set_master_slave_mode(hw);
903 	}
904 
905 	return ret_val;
906 }
907 
908 /**
909  *  e1000_phy_setup_autoneg - Configure PHY for auto-negotiation
910  *  @hw: pointer to the HW structure
911  *
912  *  Reads the MII auto-neg advertisement register and/or the 1000T control
913  *  register and if the PHY is already setup for auto-negotiation, then
914  *  return successful.  Otherwise, setup advertisement and flow control to
915  *  the appropriate values for the wanted auto-negotiation.
916  **/
917 static s32 e1000_phy_setup_autoneg(struct e1000_hw *hw)
918 {
919 	struct e1000_phy_info *phy = &hw->phy;
920 	s32 ret_val;
921 	u16 mii_autoneg_adv_reg;
922 	u16 mii_1000t_ctrl_reg = 0;
923 
924 	phy->autoneg_advertised &= phy->autoneg_mask;
925 
926 	/* Read the MII Auto-Neg Advertisement Register (Address 4). */
927 	ret_val = e1e_rphy(hw, MII_ADVERTISE, &mii_autoneg_adv_reg);
928 	if (ret_val)
929 		return ret_val;
930 
931 	if (phy->autoneg_mask & ADVERTISE_1000_FULL) {
932 		/* Read the MII 1000Base-T Control Register (Address 9). */
933 		ret_val = e1e_rphy(hw, MII_CTRL1000, &mii_1000t_ctrl_reg);
934 		if (ret_val)
935 			return ret_val;
936 	}
937 
938 	/* Need to parse both autoneg_advertised and fc and set up
939 	 * the appropriate PHY registers.  First we will parse for
940 	 * autoneg_advertised software override.  Since we can advertise
941 	 * a plethora of combinations, we need to check each bit
942 	 * individually.
943 	 */
944 
945 	/* First we clear all the 10/100 mb speed bits in the Auto-Neg
946 	 * Advertisement Register (Address 4) and the 1000 mb speed bits in
947 	 * the  1000Base-T Control Register (Address 9).
948 	 */
949 	mii_autoneg_adv_reg &= ~(ADVERTISE_100FULL |
950 				 ADVERTISE_100HALF |
951 				 ADVERTISE_10FULL | ADVERTISE_10HALF);
952 	mii_1000t_ctrl_reg &= ~(ADVERTISE_1000HALF | ADVERTISE_1000FULL);
953 
954 	e_dbg("autoneg_advertised %x\n", phy->autoneg_advertised);
955 
956 	/* Do we want to advertise 10 Mb Half Duplex? */
957 	if (phy->autoneg_advertised & ADVERTISE_10_HALF) {
958 		e_dbg("Advertise 10mb Half duplex\n");
959 		mii_autoneg_adv_reg |= ADVERTISE_10HALF;
960 	}
961 
962 	/* Do we want to advertise 10 Mb Full Duplex? */
963 	if (phy->autoneg_advertised & ADVERTISE_10_FULL) {
964 		e_dbg("Advertise 10mb Full duplex\n");
965 		mii_autoneg_adv_reg |= ADVERTISE_10FULL;
966 	}
967 
968 	/* Do we want to advertise 100 Mb Half Duplex? */
969 	if (phy->autoneg_advertised & ADVERTISE_100_HALF) {
970 		e_dbg("Advertise 100mb Half duplex\n");
971 		mii_autoneg_adv_reg |= ADVERTISE_100HALF;
972 	}
973 
974 	/* Do we want to advertise 100 Mb Full Duplex? */
975 	if (phy->autoneg_advertised & ADVERTISE_100_FULL) {
976 		e_dbg("Advertise 100mb Full duplex\n");
977 		mii_autoneg_adv_reg |= ADVERTISE_100FULL;
978 	}
979 
980 	/* We do not allow the Phy to advertise 1000 Mb Half Duplex */
981 	if (phy->autoneg_advertised & ADVERTISE_1000_HALF)
982 		e_dbg("Advertise 1000mb Half duplex request denied!\n");
983 
984 	/* Do we want to advertise 1000 Mb Full Duplex? */
985 	if (phy->autoneg_advertised & ADVERTISE_1000_FULL) {
986 		e_dbg("Advertise 1000mb Full duplex\n");
987 		mii_1000t_ctrl_reg |= ADVERTISE_1000FULL;
988 	}
989 
990 	/* Check for a software override of the flow control settings, and
991 	 * setup the PHY advertisement registers accordingly.  If
992 	 * auto-negotiation is enabled, then software will have to set the
993 	 * "PAUSE" bits to the correct value in the Auto-Negotiation
994 	 * Advertisement Register (MII_ADVERTISE) and re-start auto-
995 	 * negotiation.
996 	 *
997 	 * The possible values of the "fc" parameter are:
998 	 *      0:  Flow control is completely disabled
999 	 *      1:  Rx flow control is enabled (we can receive pause frames
1000 	 *          but not send pause frames).
1001 	 *      2:  Tx flow control is enabled (we can send pause frames
1002 	 *          but we do not support receiving pause frames).
1003 	 *      3:  Both Rx and Tx flow control (symmetric) are enabled.
1004 	 *  other:  No software override.  The flow control configuration
1005 	 *          in the EEPROM is used.
1006 	 */
1007 	switch (hw->fc.current_mode) {
1008 	case e1000_fc_none:
1009 		/* Flow control (Rx & Tx) is completely disabled by a
1010 		 * software over-ride.
1011 		 */
1012 		mii_autoneg_adv_reg &=
1013 		    ~(ADVERTISE_PAUSE_ASYM | ADVERTISE_PAUSE_CAP);
1014 		break;
1015 	case e1000_fc_rx_pause:
1016 		/* Rx Flow control is enabled, and Tx Flow control is
1017 		 * disabled, by a software over-ride.
1018 		 *
1019 		 * Since there really isn't a way to advertise that we are
1020 		 * capable of Rx Pause ONLY, we will advertise that we
1021 		 * support both symmetric and asymmetric Rx PAUSE.  Later
1022 		 * (in e1000e_config_fc_after_link_up) we will disable the
1023 		 * hw's ability to send PAUSE frames.
1024 		 */
1025 		mii_autoneg_adv_reg |=
1026 		    (ADVERTISE_PAUSE_ASYM | ADVERTISE_PAUSE_CAP);
1027 		break;
1028 	case e1000_fc_tx_pause:
1029 		/* Tx Flow control is enabled, and Rx Flow control is
1030 		 * disabled, by a software over-ride.
1031 		 */
1032 		mii_autoneg_adv_reg |= ADVERTISE_PAUSE_ASYM;
1033 		mii_autoneg_adv_reg &= ~ADVERTISE_PAUSE_CAP;
1034 		break;
1035 	case e1000_fc_full:
1036 		/* Flow control (both Rx and Tx) is enabled by a software
1037 		 * over-ride.
1038 		 */
1039 		mii_autoneg_adv_reg |=
1040 		    (ADVERTISE_PAUSE_ASYM | ADVERTISE_PAUSE_CAP);
1041 		break;
1042 	default:
1043 		e_dbg("Flow control param set incorrectly\n");
1044 		return -E1000_ERR_CONFIG;
1045 	}
1046 
1047 	ret_val = e1e_wphy(hw, MII_ADVERTISE, mii_autoneg_adv_reg);
1048 	if (ret_val)
1049 		return ret_val;
1050 
1051 	e_dbg("Auto-Neg Advertising %x\n", mii_autoneg_adv_reg);
1052 
1053 	if (phy->autoneg_mask & ADVERTISE_1000_FULL)
1054 		ret_val = e1e_wphy(hw, MII_CTRL1000, mii_1000t_ctrl_reg);
1055 
1056 	return ret_val;
1057 }
1058 
1059 /**
1060  *  e1000_copper_link_autoneg - Setup/Enable autoneg for copper link
1061  *  @hw: pointer to the HW structure
1062  *
1063  *  Performs initial bounds checking on autoneg advertisement parameter, then
1064  *  configure to advertise the full capability.  Setup the PHY to autoneg
1065  *  and restart the negotiation process between the link partner.  If
1066  *  autoneg_wait_to_complete, then wait for autoneg to complete before exiting.
1067  **/
1068 static s32 e1000_copper_link_autoneg(struct e1000_hw *hw)
1069 {
1070 	struct e1000_phy_info *phy = &hw->phy;
1071 	s32 ret_val;
1072 	u16 phy_ctrl;
1073 
1074 	/* Perform some bounds checking on the autoneg advertisement
1075 	 * parameter.
1076 	 */
1077 	phy->autoneg_advertised &= phy->autoneg_mask;
1078 
1079 	/* If autoneg_advertised is zero, we assume it was not defaulted
1080 	 * by the calling code so we set to advertise full capability.
1081 	 */
1082 	if (!phy->autoneg_advertised)
1083 		phy->autoneg_advertised = phy->autoneg_mask;
1084 
1085 	e_dbg("Reconfiguring auto-neg advertisement params\n");
1086 	ret_val = e1000_phy_setup_autoneg(hw);
1087 	if (ret_val) {
1088 		e_dbg("Error Setting up Auto-Negotiation\n");
1089 		return ret_val;
1090 	}
1091 	e_dbg("Restarting Auto-Neg\n");
1092 
1093 	/* Restart auto-negotiation by setting the Auto Neg Enable bit and
1094 	 * the Auto Neg Restart bit in the PHY control register.
1095 	 */
1096 	ret_val = e1e_rphy(hw, MII_BMCR, &phy_ctrl);
1097 	if (ret_val)
1098 		return ret_val;
1099 
1100 	phy_ctrl |= (BMCR_ANENABLE | BMCR_ANRESTART);
1101 	ret_val = e1e_wphy(hw, MII_BMCR, phy_ctrl);
1102 	if (ret_val)
1103 		return ret_val;
1104 
1105 	/* Does the user want to wait for Auto-Neg to complete here, or
1106 	 * check at a later time (for example, callback routine).
1107 	 */
1108 	if (phy->autoneg_wait_to_complete) {
1109 		ret_val = e1000_wait_autoneg(hw);
1110 		if (ret_val) {
1111 			e_dbg("Error while waiting for autoneg to complete\n");
1112 			return ret_val;
1113 		}
1114 	}
1115 
1116 	hw->mac.get_link_status = true;
1117 
1118 	return ret_val;
1119 }
1120 
1121 /**
1122  *  e1000e_setup_copper_link - Configure copper link settings
1123  *  @hw: pointer to the HW structure
1124  *
1125  *  Calls the appropriate function to configure the link for auto-neg or forced
1126  *  speed and duplex.  Then we check for link, once link is established calls
1127  *  to configure collision distance and flow control are called.  If link is
1128  *  not established, we return -E1000_ERR_PHY (-2).
1129  **/
1130 s32 e1000e_setup_copper_link(struct e1000_hw *hw)
1131 {
1132 	s32 ret_val;
1133 	bool link;
1134 
1135 	if (hw->mac.autoneg) {
1136 		/* Setup autoneg and flow control advertisement and perform
1137 		 * autonegotiation.
1138 		 */
1139 		ret_val = e1000_copper_link_autoneg(hw);
1140 		if (ret_val)
1141 			return ret_val;
1142 	} else {
1143 		/* PHY will be set to 10H, 10F, 100H or 100F
1144 		 * depending on user settings.
1145 		 */
1146 		e_dbg("Forcing Speed and Duplex\n");
1147 		ret_val = hw->phy.ops.force_speed_duplex(hw);
1148 		if (ret_val) {
1149 			e_dbg("Error Forcing Speed and Duplex\n");
1150 			return ret_val;
1151 		}
1152 	}
1153 
1154 	/* Check link status. Wait up to 100 microseconds for link to become
1155 	 * valid.
1156 	 */
1157 	ret_val = e1000e_phy_has_link_generic(hw, COPPER_LINK_UP_LIMIT, 10,
1158 					      &link);
1159 	if (ret_val)
1160 		return ret_val;
1161 
1162 	if (link) {
1163 		e_dbg("Valid link established!!!\n");
1164 		hw->mac.ops.config_collision_dist(hw);
1165 		ret_val = e1000e_config_fc_after_link_up(hw);
1166 	} else {
1167 		e_dbg("Unable to establish link!!!\n");
1168 	}
1169 
1170 	return ret_val;
1171 }
1172 
1173 /**
1174  *  e1000e_phy_force_speed_duplex_igp - Force speed/duplex for igp PHY
1175  *  @hw: pointer to the HW structure
1176  *
1177  *  Calls the PHY setup function to force speed and duplex.  Clears the
1178  *  auto-crossover to force MDI manually.  Waits for link and returns
1179  *  successful if link up is successful, else -E1000_ERR_PHY (-2).
1180  **/
1181 s32 e1000e_phy_force_speed_duplex_igp(struct e1000_hw *hw)
1182 {
1183 	struct e1000_phy_info *phy = &hw->phy;
1184 	s32 ret_val;
1185 	u16 phy_data;
1186 	bool link;
1187 
1188 	ret_val = e1e_rphy(hw, MII_BMCR, &phy_data);
1189 	if (ret_val)
1190 		return ret_val;
1191 
1192 	e1000e_phy_force_speed_duplex_setup(hw, &phy_data);
1193 
1194 	ret_val = e1e_wphy(hw, MII_BMCR, phy_data);
1195 	if (ret_val)
1196 		return ret_val;
1197 
1198 	/* Clear Auto-Crossover to force MDI manually.  IGP requires MDI
1199 	 * forced whenever speed and duplex are forced.
1200 	 */
1201 	ret_val = e1e_rphy(hw, IGP01E1000_PHY_PORT_CTRL, &phy_data);
1202 	if (ret_val)
1203 		return ret_val;
1204 
1205 	phy_data &= ~IGP01E1000_PSCR_AUTO_MDIX;
1206 	phy_data &= ~IGP01E1000_PSCR_FORCE_MDI_MDIX;
1207 
1208 	ret_val = e1e_wphy(hw, IGP01E1000_PHY_PORT_CTRL, phy_data);
1209 	if (ret_val)
1210 		return ret_val;
1211 
1212 	e_dbg("IGP PSCR: %X\n", phy_data);
1213 
1214 	udelay(1);
1215 
1216 	if (phy->autoneg_wait_to_complete) {
1217 		e_dbg("Waiting for forced speed/duplex link on IGP phy.\n");
1218 
1219 		ret_val = e1000e_phy_has_link_generic(hw, PHY_FORCE_LIMIT,
1220 						      100000, &link);
1221 		if (ret_val)
1222 			return ret_val;
1223 
1224 		if (!link)
1225 			e_dbg("Link taking longer than expected.\n");
1226 
1227 		/* Try once more */
1228 		ret_val = e1000e_phy_has_link_generic(hw, PHY_FORCE_LIMIT,
1229 						      100000, &link);
1230 	}
1231 
1232 	return ret_val;
1233 }
1234 
1235 /**
1236  *  e1000e_phy_force_speed_duplex_m88 - Force speed/duplex for m88 PHY
1237  *  @hw: pointer to the HW structure
1238  *
1239  *  Calls the PHY setup function to force speed and duplex.  Clears the
1240  *  auto-crossover to force MDI manually.  Resets the PHY to commit the
1241  *  changes.  If time expires while waiting for link up, we reset the DSP.
1242  *  After reset, TX_CLK and CRS on Tx must be set.  Return successful upon
1243  *  successful completion, else return corresponding error code.
1244  **/
1245 s32 e1000e_phy_force_speed_duplex_m88(struct e1000_hw *hw)
1246 {
1247 	struct e1000_phy_info *phy = &hw->phy;
1248 	s32 ret_val;
1249 	u16 phy_data;
1250 	bool link;
1251 
1252 	/* Clear Auto-Crossover to force MDI manually.  M88E1000 requires MDI
1253 	 * forced whenever speed and duplex are forced.
1254 	 */
1255 	ret_val = e1e_rphy(hw, M88E1000_PHY_SPEC_CTRL, &phy_data);
1256 	if (ret_val)
1257 		return ret_val;
1258 
1259 	phy_data &= ~M88E1000_PSCR_AUTO_X_MODE;
1260 	ret_val = e1e_wphy(hw, M88E1000_PHY_SPEC_CTRL, phy_data);
1261 	if (ret_val)
1262 		return ret_val;
1263 
1264 	e_dbg("M88E1000 PSCR: %X\n", phy_data);
1265 
1266 	ret_val = e1e_rphy(hw, MII_BMCR, &phy_data);
1267 	if (ret_val)
1268 		return ret_val;
1269 
1270 	e1000e_phy_force_speed_duplex_setup(hw, &phy_data);
1271 
1272 	ret_val = e1e_wphy(hw, MII_BMCR, phy_data);
1273 	if (ret_val)
1274 		return ret_val;
1275 
1276 	/* Reset the phy to commit changes. */
1277 	if (hw->phy.ops.commit) {
1278 		ret_val = hw->phy.ops.commit(hw);
1279 		if (ret_val)
1280 			return ret_val;
1281 	}
1282 
1283 	if (phy->autoneg_wait_to_complete) {
1284 		e_dbg("Waiting for forced speed/duplex link on M88 phy.\n");
1285 
1286 		ret_val = e1000e_phy_has_link_generic(hw, PHY_FORCE_LIMIT,
1287 						      100000, &link);
1288 		if (ret_val)
1289 			return ret_val;
1290 
1291 		if (!link) {
1292 			if (hw->phy.type != e1000_phy_m88) {
1293 				e_dbg("Link taking longer than expected.\n");
1294 			} else {
1295 				/* We didn't get link.
1296 				 * Reset the DSP and cross our fingers.
1297 				 */
1298 				ret_val = e1e_wphy(hw, M88E1000_PHY_PAGE_SELECT,
1299 						   0x001d);
1300 				if (ret_val)
1301 					return ret_val;
1302 				ret_val = e1000e_phy_reset_dsp(hw);
1303 				if (ret_val)
1304 					return ret_val;
1305 			}
1306 		}
1307 
1308 		/* Try once more */
1309 		ret_val = e1000e_phy_has_link_generic(hw, PHY_FORCE_LIMIT,
1310 						      100000, &link);
1311 		if (ret_val)
1312 			return ret_val;
1313 	}
1314 
1315 	if (hw->phy.type != e1000_phy_m88)
1316 		return 0;
1317 
1318 	ret_val = e1e_rphy(hw, M88E1000_EXT_PHY_SPEC_CTRL, &phy_data);
1319 	if (ret_val)
1320 		return ret_val;
1321 
1322 	/* Resetting the phy means we need to re-force TX_CLK in the
1323 	 * Extended PHY Specific Control Register to 25MHz clock from
1324 	 * the reset value of 2.5MHz.
1325 	 */
1326 	phy_data |= M88E1000_EPSCR_TX_CLK_25;
1327 	ret_val = e1e_wphy(hw, M88E1000_EXT_PHY_SPEC_CTRL, phy_data);
1328 	if (ret_val)
1329 		return ret_val;
1330 
1331 	/* In addition, we must re-enable CRS on Tx for both half and full
1332 	 * duplex.
1333 	 */
1334 	ret_val = e1e_rphy(hw, M88E1000_PHY_SPEC_CTRL, &phy_data);
1335 	if (ret_val)
1336 		return ret_val;
1337 
1338 	phy_data |= M88E1000_PSCR_ASSERT_CRS_ON_TX;
1339 	ret_val = e1e_wphy(hw, M88E1000_PHY_SPEC_CTRL, phy_data);
1340 
1341 	return ret_val;
1342 }
1343 
1344 /**
1345  *  e1000_phy_force_speed_duplex_ife - Force PHY speed & duplex
1346  *  @hw: pointer to the HW structure
1347  *
1348  *  Forces the speed and duplex settings of the PHY.
1349  *  This is a function pointer entry point only called by
1350  *  PHY setup routines.
1351  **/
1352 s32 e1000_phy_force_speed_duplex_ife(struct e1000_hw *hw)
1353 {
1354 	struct e1000_phy_info *phy = &hw->phy;
1355 	s32 ret_val;
1356 	u16 data;
1357 	bool link;
1358 
1359 	ret_val = e1e_rphy(hw, MII_BMCR, &data);
1360 	if (ret_val)
1361 		return ret_val;
1362 
1363 	e1000e_phy_force_speed_duplex_setup(hw, &data);
1364 
1365 	ret_val = e1e_wphy(hw, MII_BMCR, data);
1366 	if (ret_val)
1367 		return ret_val;
1368 
1369 	/* Disable MDI-X support for 10/100 */
1370 	ret_val = e1e_rphy(hw, IFE_PHY_MDIX_CONTROL, &data);
1371 	if (ret_val)
1372 		return ret_val;
1373 
1374 	data &= ~IFE_PMC_AUTO_MDIX;
1375 	data &= ~IFE_PMC_FORCE_MDIX;
1376 
1377 	ret_val = e1e_wphy(hw, IFE_PHY_MDIX_CONTROL, data);
1378 	if (ret_val)
1379 		return ret_val;
1380 
1381 	e_dbg("IFE PMC: %X\n", data);
1382 
1383 	udelay(1);
1384 
1385 	if (phy->autoneg_wait_to_complete) {
1386 		e_dbg("Waiting for forced speed/duplex link on IFE phy.\n");
1387 
1388 		ret_val = e1000e_phy_has_link_generic(hw, PHY_FORCE_LIMIT,
1389 						      100000, &link);
1390 		if (ret_val)
1391 			return ret_val;
1392 
1393 		if (!link)
1394 			e_dbg("Link taking longer than expected.\n");
1395 
1396 		/* Try once more */
1397 		ret_val = e1000e_phy_has_link_generic(hw, PHY_FORCE_LIMIT,
1398 						      100000, &link);
1399 		if (ret_val)
1400 			return ret_val;
1401 	}
1402 
1403 	return 0;
1404 }
1405 
1406 /**
1407  *  e1000e_phy_force_speed_duplex_setup - Configure forced PHY speed/duplex
1408  *  @hw: pointer to the HW structure
1409  *  @phy_ctrl: pointer to current value of MII_BMCR
1410  *
1411  *  Forces speed and duplex on the PHY by doing the following: disable flow
1412  *  control, force speed/duplex on the MAC, disable auto speed detection,
1413  *  disable auto-negotiation, configure duplex, configure speed, configure
1414  *  the collision distance, write configuration to CTRL register.  The
1415  *  caller must write to the MII_BMCR register for these settings to
1416  *  take affect.
1417  **/
1418 void e1000e_phy_force_speed_duplex_setup(struct e1000_hw *hw, u16 *phy_ctrl)
1419 {
1420 	struct e1000_mac_info *mac = &hw->mac;
1421 	u32 ctrl;
1422 
1423 	/* Turn off flow control when forcing speed/duplex */
1424 	hw->fc.current_mode = e1000_fc_none;
1425 
1426 	/* Force speed/duplex on the mac */
1427 	ctrl = er32(CTRL);
1428 	ctrl |= (E1000_CTRL_FRCSPD | E1000_CTRL_FRCDPX);
1429 	ctrl &= ~E1000_CTRL_SPD_SEL;
1430 
1431 	/* Disable Auto Speed Detection */
1432 	ctrl &= ~E1000_CTRL_ASDE;
1433 
1434 	/* Disable autoneg on the phy */
1435 	*phy_ctrl &= ~BMCR_ANENABLE;
1436 
1437 	/* Forcing Full or Half Duplex? */
1438 	if (mac->forced_speed_duplex & E1000_ALL_HALF_DUPLEX) {
1439 		ctrl &= ~E1000_CTRL_FD;
1440 		*phy_ctrl &= ~BMCR_FULLDPLX;
1441 		e_dbg("Half Duplex\n");
1442 	} else {
1443 		ctrl |= E1000_CTRL_FD;
1444 		*phy_ctrl |= BMCR_FULLDPLX;
1445 		e_dbg("Full Duplex\n");
1446 	}
1447 
1448 	/* Forcing 10mb or 100mb? */
1449 	if (mac->forced_speed_duplex & E1000_ALL_100_SPEED) {
1450 		ctrl |= E1000_CTRL_SPD_100;
1451 		*phy_ctrl |= BMCR_SPEED100;
1452 		*phy_ctrl &= ~BMCR_SPEED1000;
1453 		e_dbg("Forcing 100mb\n");
1454 	} else {
1455 		ctrl &= ~(E1000_CTRL_SPD_1000 | E1000_CTRL_SPD_100);
1456 		*phy_ctrl &= ~(BMCR_SPEED1000 | BMCR_SPEED100);
1457 		e_dbg("Forcing 10mb\n");
1458 	}
1459 
1460 	hw->mac.ops.config_collision_dist(hw);
1461 
1462 	ew32(CTRL, ctrl);
1463 }
1464 
1465 /**
1466  *  e1000e_set_d3_lplu_state - Sets low power link up state for D3
1467  *  @hw: pointer to the HW structure
1468  *  @active: boolean used to enable/disable lplu
1469  *
1470  *  Success returns 0, Failure returns 1
1471  *
1472  *  The low power link up (lplu) state is set to the power management level D3
1473  *  and SmartSpeed is disabled when active is true, else clear lplu for D3
1474  *  and enable Smartspeed.  LPLU and Smartspeed are mutually exclusive.  LPLU
1475  *  is used during Dx states where the power conservation is most important.
1476  *  During driver activity, SmartSpeed should be enabled so performance is
1477  *  maintained.
1478  **/
1479 s32 e1000e_set_d3_lplu_state(struct e1000_hw *hw, bool active)
1480 {
1481 	struct e1000_phy_info *phy = &hw->phy;
1482 	s32 ret_val;
1483 	u16 data;
1484 
1485 	ret_val = e1e_rphy(hw, IGP02E1000_PHY_POWER_MGMT, &data);
1486 	if (ret_val)
1487 		return ret_val;
1488 
1489 	if (!active) {
1490 		data &= ~IGP02E1000_PM_D3_LPLU;
1491 		ret_val = e1e_wphy(hw, IGP02E1000_PHY_POWER_MGMT, data);
1492 		if (ret_val)
1493 			return ret_val;
1494 		/* LPLU and SmartSpeed are mutually exclusive.  LPLU is used
1495 		 * during Dx states where the power conservation is most
1496 		 * important.  During driver activity we should enable
1497 		 * SmartSpeed, so performance is maintained.
1498 		 */
1499 		if (phy->smart_speed == e1000_smart_speed_on) {
1500 			ret_val = e1e_rphy(hw, IGP01E1000_PHY_PORT_CONFIG,
1501 					   &data);
1502 			if (ret_val)
1503 				return ret_val;
1504 
1505 			data |= IGP01E1000_PSCFR_SMART_SPEED;
1506 			ret_val = e1e_wphy(hw, IGP01E1000_PHY_PORT_CONFIG,
1507 					   data);
1508 			if (ret_val)
1509 				return ret_val;
1510 		} else if (phy->smart_speed == e1000_smart_speed_off) {
1511 			ret_val = e1e_rphy(hw, IGP01E1000_PHY_PORT_CONFIG,
1512 					   &data);
1513 			if (ret_val)
1514 				return ret_val;
1515 
1516 			data &= ~IGP01E1000_PSCFR_SMART_SPEED;
1517 			ret_val = e1e_wphy(hw, IGP01E1000_PHY_PORT_CONFIG,
1518 					   data);
1519 			if (ret_val)
1520 				return ret_val;
1521 		}
1522 	} else if ((phy->autoneg_advertised == E1000_ALL_SPEED_DUPLEX) ||
1523 		   (phy->autoneg_advertised == E1000_ALL_NOT_GIG) ||
1524 		   (phy->autoneg_advertised == E1000_ALL_10_SPEED)) {
1525 		data |= IGP02E1000_PM_D3_LPLU;
1526 		ret_val = e1e_wphy(hw, IGP02E1000_PHY_POWER_MGMT, data);
1527 		if (ret_val)
1528 			return ret_val;
1529 
1530 		/* When LPLU is enabled, we should disable SmartSpeed */
1531 		ret_val = e1e_rphy(hw, IGP01E1000_PHY_PORT_CONFIG, &data);
1532 		if (ret_val)
1533 			return ret_val;
1534 
1535 		data &= ~IGP01E1000_PSCFR_SMART_SPEED;
1536 		ret_val = e1e_wphy(hw, IGP01E1000_PHY_PORT_CONFIG, data);
1537 	}
1538 
1539 	return ret_val;
1540 }
1541 
1542 /**
1543  *  e1000e_check_downshift - Checks whether a downshift in speed occurred
1544  *  @hw: pointer to the HW structure
1545  *
1546  *  Success returns 0, Failure returns 1
1547  *
1548  *  A downshift is detected by querying the PHY link health.
1549  **/
1550 s32 e1000e_check_downshift(struct e1000_hw *hw)
1551 {
1552 	struct e1000_phy_info *phy = &hw->phy;
1553 	s32 ret_val;
1554 	u16 phy_data, offset, mask;
1555 
1556 	switch (phy->type) {
1557 	case e1000_phy_m88:
1558 	case e1000_phy_gg82563:
1559 	case e1000_phy_bm:
1560 	case e1000_phy_82578:
1561 		offset = M88E1000_PHY_SPEC_STATUS;
1562 		mask = M88E1000_PSSR_DOWNSHIFT;
1563 		break;
1564 	case e1000_phy_igp_2:
1565 	case e1000_phy_igp_3:
1566 		offset = IGP01E1000_PHY_LINK_HEALTH;
1567 		mask = IGP01E1000_PLHR_SS_DOWNGRADE;
1568 		break;
1569 	default:
1570 		/* speed downshift not supported */
1571 		phy->speed_downgraded = false;
1572 		return 0;
1573 	}
1574 
1575 	ret_val = e1e_rphy(hw, offset, &phy_data);
1576 
1577 	if (!ret_val)
1578 		phy->speed_downgraded = !!(phy_data & mask);
1579 
1580 	return ret_val;
1581 }
1582 
1583 /**
1584  *  e1000_check_polarity_m88 - Checks the polarity.
1585  *  @hw: pointer to the HW structure
1586  *
1587  *  Success returns 0, Failure returns -E1000_ERR_PHY (-2)
1588  *
1589  *  Polarity is determined based on the PHY specific status register.
1590  **/
1591 s32 e1000_check_polarity_m88(struct e1000_hw *hw)
1592 {
1593 	struct e1000_phy_info *phy = &hw->phy;
1594 	s32 ret_val;
1595 	u16 data;
1596 
1597 	ret_val = e1e_rphy(hw, M88E1000_PHY_SPEC_STATUS, &data);
1598 
1599 	if (!ret_val)
1600 		phy->cable_polarity = ((data & M88E1000_PSSR_REV_POLARITY)
1601 				       ? e1000_rev_polarity_reversed
1602 				       : e1000_rev_polarity_normal);
1603 
1604 	return ret_val;
1605 }
1606 
1607 /**
1608  *  e1000_check_polarity_igp - Checks the polarity.
1609  *  @hw: pointer to the HW structure
1610  *
1611  *  Success returns 0, Failure returns -E1000_ERR_PHY (-2)
1612  *
1613  *  Polarity is determined based on the PHY port status register, and the
1614  *  current speed (since there is no polarity at 100Mbps).
1615  **/
1616 s32 e1000_check_polarity_igp(struct e1000_hw *hw)
1617 {
1618 	struct e1000_phy_info *phy = &hw->phy;
1619 	s32 ret_val;
1620 	u16 data, offset, mask;
1621 
1622 	/* Polarity is determined based on the speed of
1623 	 * our connection.
1624 	 */
1625 	ret_val = e1e_rphy(hw, IGP01E1000_PHY_PORT_STATUS, &data);
1626 	if (ret_val)
1627 		return ret_val;
1628 
1629 	if ((data & IGP01E1000_PSSR_SPEED_MASK) ==
1630 	    IGP01E1000_PSSR_SPEED_1000MBPS) {
1631 		offset = IGP01E1000_PHY_PCS_INIT_REG;
1632 		mask = IGP01E1000_PHY_POLARITY_MASK;
1633 	} else {
1634 		/* This really only applies to 10Mbps since
1635 		 * there is no polarity for 100Mbps (always 0).
1636 		 */
1637 		offset = IGP01E1000_PHY_PORT_STATUS;
1638 		mask = IGP01E1000_PSSR_POLARITY_REVERSED;
1639 	}
1640 
1641 	ret_val = e1e_rphy(hw, offset, &data);
1642 
1643 	if (!ret_val)
1644 		phy->cable_polarity = ((data & mask)
1645 				       ? e1000_rev_polarity_reversed
1646 				       : e1000_rev_polarity_normal);
1647 
1648 	return ret_val;
1649 }
1650 
1651 /**
1652  *  e1000_check_polarity_ife - Check cable polarity for IFE PHY
1653  *  @hw: pointer to the HW structure
1654  *
1655  *  Polarity is determined on the polarity reversal feature being enabled.
1656  **/
1657 s32 e1000_check_polarity_ife(struct e1000_hw *hw)
1658 {
1659 	struct e1000_phy_info *phy = &hw->phy;
1660 	s32 ret_val;
1661 	u16 phy_data, offset, mask;
1662 
1663 	/* Polarity is determined based on the reversal feature being enabled.
1664 	 */
1665 	if (phy->polarity_correction) {
1666 		offset = IFE_PHY_EXTENDED_STATUS_CONTROL;
1667 		mask = IFE_PESC_POLARITY_REVERSED;
1668 	} else {
1669 		offset = IFE_PHY_SPECIAL_CONTROL;
1670 		mask = IFE_PSC_FORCE_POLARITY;
1671 	}
1672 
1673 	ret_val = e1e_rphy(hw, offset, &phy_data);
1674 
1675 	if (!ret_val)
1676 		phy->cable_polarity = ((phy_data & mask)
1677 				       ? e1000_rev_polarity_reversed
1678 				       : e1000_rev_polarity_normal);
1679 
1680 	return ret_val;
1681 }
1682 
1683 /**
1684  *  e1000_wait_autoneg - Wait for auto-neg completion
1685  *  @hw: pointer to the HW structure
1686  *
1687  *  Waits for auto-negotiation to complete or for the auto-negotiation time
1688  *  limit to expire, which ever happens first.
1689  **/
1690 static s32 e1000_wait_autoneg(struct e1000_hw *hw)
1691 {
1692 	s32 ret_val = 0;
1693 	u16 i, phy_status;
1694 
1695 	/* Break after autoneg completes or PHY_AUTO_NEG_LIMIT expires. */
1696 	for (i = PHY_AUTO_NEG_LIMIT; i > 0; i--) {
1697 		ret_val = e1e_rphy(hw, MII_BMSR, &phy_status);
1698 		if (ret_val)
1699 			break;
1700 		ret_val = e1e_rphy(hw, MII_BMSR, &phy_status);
1701 		if (ret_val)
1702 			break;
1703 		if (phy_status & BMSR_ANEGCOMPLETE)
1704 			break;
1705 		msleep(100);
1706 	}
1707 
1708 	/* PHY_AUTO_NEG_TIME expiration doesn't guarantee auto-negotiation
1709 	 * has completed.
1710 	 */
1711 	return ret_val;
1712 }
1713 
1714 /**
1715  *  e1000e_phy_has_link_generic - Polls PHY for link
1716  *  @hw: pointer to the HW structure
1717  *  @iterations: number of times to poll for link
1718  *  @usec_interval: delay between polling attempts
1719  *  @success: pointer to whether polling was successful or not
1720  *
1721  *  Polls the PHY status register for link, 'iterations' number of times.
1722  **/
1723 s32 e1000e_phy_has_link_generic(struct e1000_hw *hw, u32 iterations,
1724 				u32 usec_interval, bool *success)
1725 {
1726 	s32 ret_val = 0;
1727 	u16 i, phy_status;
1728 
1729 	*success = false;
1730 	for (i = 0; i < iterations; i++) {
1731 		/* Some PHYs require the MII_BMSR register to be read
1732 		 * twice due to the link bit being sticky.  No harm doing
1733 		 * it across the board.
1734 		 */
1735 		ret_val = e1e_rphy(hw, MII_BMSR, &phy_status);
1736 		if (ret_val) {
1737 			/* If the first read fails, another entity may have
1738 			 * ownership of the resources, wait and try again to
1739 			 * see if they have relinquished the resources yet.
1740 			 */
1741 			if (usec_interval >= 1000)
1742 				msleep(usec_interval / 1000);
1743 			else
1744 				udelay(usec_interval);
1745 		}
1746 		ret_val = e1e_rphy(hw, MII_BMSR, &phy_status);
1747 		if (ret_val)
1748 			break;
1749 		if (phy_status & BMSR_LSTATUS) {
1750 			*success = true;
1751 			break;
1752 		}
1753 		if (usec_interval >= 1000)
1754 			msleep(usec_interval / 1000);
1755 		else
1756 			udelay(usec_interval);
1757 	}
1758 
1759 	return ret_val;
1760 }
1761 
1762 /**
1763  *  e1000e_get_cable_length_m88 - Determine cable length for m88 PHY
1764  *  @hw: pointer to the HW structure
1765  *
1766  *  Reads the PHY specific status register to retrieve the cable length
1767  *  information.  The cable length is determined by averaging the minimum and
1768  *  maximum values to get the "average" cable length.  The m88 PHY has four
1769  *  possible cable length values, which are:
1770  *	Register Value		Cable Length
1771  *	0			< 50 meters
1772  *	1			50 - 80 meters
1773  *	2			80 - 110 meters
1774  *	3			110 - 140 meters
1775  *	4			> 140 meters
1776  **/
1777 s32 e1000e_get_cable_length_m88(struct e1000_hw *hw)
1778 {
1779 	struct e1000_phy_info *phy = &hw->phy;
1780 	s32 ret_val;
1781 	u16 phy_data, index;
1782 
1783 	ret_val = e1e_rphy(hw, M88E1000_PHY_SPEC_STATUS, &phy_data);
1784 	if (ret_val)
1785 		return ret_val;
1786 
1787 	index = ((phy_data & M88E1000_PSSR_CABLE_LENGTH) >>
1788 		 M88E1000_PSSR_CABLE_LENGTH_SHIFT);
1789 
1790 	if (index >= M88E1000_CABLE_LENGTH_TABLE_SIZE - 1)
1791 		return -E1000_ERR_PHY;
1792 
1793 	phy->min_cable_length = e1000_m88_cable_length_table[index];
1794 	phy->max_cable_length = e1000_m88_cable_length_table[index + 1];
1795 
1796 	phy->cable_length = (phy->min_cable_length + phy->max_cable_length) / 2;
1797 
1798 	return 0;
1799 }
1800 
1801 /**
1802  *  e1000e_get_cable_length_igp_2 - Determine cable length for igp2 PHY
1803  *  @hw: pointer to the HW structure
1804  *
1805  *  The automatic gain control (agc) normalizes the amplitude of the
1806  *  received signal, adjusting for the attenuation produced by the
1807  *  cable.  By reading the AGC registers, which represent the
1808  *  combination of coarse and fine gain value, the value can be put
1809  *  into a lookup table to obtain the approximate cable length
1810  *  for each channel.
1811  **/
1812 s32 e1000e_get_cable_length_igp_2(struct e1000_hw *hw)
1813 {
1814 	struct e1000_phy_info *phy = &hw->phy;
1815 	s32 ret_val;
1816 	u16 phy_data, i, agc_value = 0;
1817 	u16 cur_agc_index, max_agc_index = 0;
1818 	u16 min_agc_index = IGP02E1000_CABLE_LENGTH_TABLE_SIZE - 1;
1819 	static const u16 agc_reg_array[IGP02E1000_PHY_CHANNEL_NUM] = {
1820 		IGP02E1000_PHY_AGC_A,
1821 		IGP02E1000_PHY_AGC_B,
1822 		IGP02E1000_PHY_AGC_C,
1823 		IGP02E1000_PHY_AGC_D
1824 	};
1825 
1826 	/* Read the AGC registers for all channels */
1827 	for (i = 0; i < IGP02E1000_PHY_CHANNEL_NUM; i++) {
1828 		ret_val = e1e_rphy(hw, agc_reg_array[i], &phy_data);
1829 		if (ret_val)
1830 			return ret_val;
1831 
1832 		/* Getting bits 15:9, which represent the combination of
1833 		 * coarse and fine gain values.  The result is a number
1834 		 * that can be put into the lookup table to obtain the
1835 		 * approximate cable length.
1836 		 */
1837 		cur_agc_index = ((phy_data >> IGP02E1000_AGC_LENGTH_SHIFT) &
1838 				 IGP02E1000_AGC_LENGTH_MASK);
1839 
1840 		/* Array index bound check. */
1841 		if ((cur_agc_index >= IGP02E1000_CABLE_LENGTH_TABLE_SIZE) ||
1842 		    (cur_agc_index == 0))
1843 			return -E1000_ERR_PHY;
1844 
1845 		/* Remove min & max AGC values from calculation. */
1846 		if (e1000_igp_2_cable_length_table[min_agc_index] >
1847 		    e1000_igp_2_cable_length_table[cur_agc_index])
1848 			min_agc_index = cur_agc_index;
1849 		if (e1000_igp_2_cable_length_table[max_agc_index] <
1850 		    e1000_igp_2_cable_length_table[cur_agc_index])
1851 			max_agc_index = cur_agc_index;
1852 
1853 		agc_value += e1000_igp_2_cable_length_table[cur_agc_index];
1854 	}
1855 
1856 	agc_value -= (e1000_igp_2_cable_length_table[min_agc_index] +
1857 		      e1000_igp_2_cable_length_table[max_agc_index]);
1858 	agc_value /= (IGP02E1000_PHY_CHANNEL_NUM - 2);
1859 
1860 	/* Calculate cable length with the error range of +/- 10 meters. */
1861 	phy->min_cable_length = (((agc_value - IGP02E1000_AGC_RANGE) > 0) ?
1862 				 (agc_value - IGP02E1000_AGC_RANGE) : 0);
1863 	phy->max_cable_length = agc_value + IGP02E1000_AGC_RANGE;
1864 
1865 	phy->cable_length = (phy->min_cable_length + phy->max_cable_length) / 2;
1866 
1867 	return 0;
1868 }
1869 
1870 /**
1871  *  e1000e_get_phy_info_m88 - Retrieve PHY information
1872  *  @hw: pointer to the HW structure
1873  *
1874  *  Valid for only copper links.  Read the PHY status register (sticky read)
1875  *  to verify that link is up.  Read the PHY special control register to
1876  *  determine the polarity and 10base-T extended distance.  Read the PHY
1877  *  special status register to determine MDI/MDIx and current speed.  If
1878  *  speed is 1000, then determine cable length, local and remote receiver.
1879  **/
1880 s32 e1000e_get_phy_info_m88(struct e1000_hw *hw)
1881 {
1882 	struct e1000_phy_info *phy = &hw->phy;
1883 	s32 ret_val;
1884 	u16 phy_data;
1885 	bool link;
1886 
1887 	if (phy->media_type != e1000_media_type_copper) {
1888 		e_dbg("Phy info is only valid for copper media\n");
1889 		return -E1000_ERR_CONFIG;
1890 	}
1891 
1892 	ret_val = e1000e_phy_has_link_generic(hw, 1, 0, &link);
1893 	if (ret_val)
1894 		return ret_val;
1895 
1896 	if (!link) {
1897 		e_dbg("Phy info is only valid if link is up\n");
1898 		return -E1000_ERR_CONFIG;
1899 	}
1900 
1901 	ret_val = e1e_rphy(hw, M88E1000_PHY_SPEC_CTRL, &phy_data);
1902 	if (ret_val)
1903 		return ret_val;
1904 
1905 	phy->polarity_correction = !!(phy_data &
1906 				      M88E1000_PSCR_POLARITY_REVERSAL);
1907 
1908 	ret_val = e1000_check_polarity_m88(hw);
1909 	if (ret_val)
1910 		return ret_val;
1911 
1912 	ret_val = e1e_rphy(hw, M88E1000_PHY_SPEC_STATUS, &phy_data);
1913 	if (ret_val)
1914 		return ret_val;
1915 
1916 	phy->is_mdix = !!(phy_data & M88E1000_PSSR_MDIX);
1917 
1918 	if ((phy_data & M88E1000_PSSR_SPEED) == M88E1000_PSSR_1000MBS) {
1919 		ret_val = hw->phy.ops.get_cable_length(hw);
1920 		if (ret_val)
1921 			return ret_val;
1922 
1923 		ret_val = e1e_rphy(hw, MII_STAT1000, &phy_data);
1924 		if (ret_val)
1925 			return ret_val;
1926 
1927 		phy->local_rx = (phy_data & LPA_1000LOCALRXOK)
1928 		    ? e1000_1000t_rx_status_ok : e1000_1000t_rx_status_not_ok;
1929 
1930 		phy->remote_rx = (phy_data & LPA_1000REMRXOK)
1931 		    ? e1000_1000t_rx_status_ok : e1000_1000t_rx_status_not_ok;
1932 	} else {
1933 		/* Set values to "undefined" */
1934 		phy->cable_length = E1000_CABLE_LENGTH_UNDEFINED;
1935 		phy->local_rx = e1000_1000t_rx_status_undefined;
1936 		phy->remote_rx = e1000_1000t_rx_status_undefined;
1937 	}
1938 
1939 	return ret_val;
1940 }
1941 
1942 /**
1943  *  e1000e_get_phy_info_igp - Retrieve igp PHY information
1944  *  @hw: pointer to the HW structure
1945  *
1946  *  Read PHY status to determine if link is up.  If link is up, then
1947  *  set/determine 10base-T extended distance and polarity correction.  Read
1948  *  PHY port status to determine MDI/MDIx and speed.  Based on the speed,
1949  *  determine on the cable length, local and remote receiver.
1950  **/
1951 s32 e1000e_get_phy_info_igp(struct e1000_hw *hw)
1952 {
1953 	struct e1000_phy_info *phy = &hw->phy;
1954 	s32 ret_val;
1955 	u16 data;
1956 	bool link;
1957 
1958 	ret_val = e1000e_phy_has_link_generic(hw, 1, 0, &link);
1959 	if (ret_val)
1960 		return ret_val;
1961 
1962 	if (!link) {
1963 		e_dbg("Phy info is only valid if link is up\n");
1964 		return -E1000_ERR_CONFIG;
1965 	}
1966 
1967 	phy->polarity_correction = true;
1968 
1969 	ret_val = e1000_check_polarity_igp(hw);
1970 	if (ret_val)
1971 		return ret_val;
1972 
1973 	ret_val = e1e_rphy(hw, IGP01E1000_PHY_PORT_STATUS, &data);
1974 	if (ret_val)
1975 		return ret_val;
1976 
1977 	phy->is_mdix = !!(data & IGP01E1000_PSSR_MDIX);
1978 
1979 	if ((data & IGP01E1000_PSSR_SPEED_MASK) ==
1980 	    IGP01E1000_PSSR_SPEED_1000MBPS) {
1981 		ret_val = phy->ops.get_cable_length(hw);
1982 		if (ret_val)
1983 			return ret_val;
1984 
1985 		ret_val = e1e_rphy(hw, MII_STAT1000, &data);
1986 		if (ret_val)
1987 			return ret_val;
1988 
1989 		phy->local_rx = (data & LPA_1000LOCALRXOK)
1990 		    ? e1000_1000t_rx_status_ok : e1000_1000t_rx_status_not_ok;
1991 
1992 		phy->remote_rx = (data & LPA_1000REMRXOK)
1993 		    ? e1000_1000t_rx_status_ok : e1000_1000t_rx_status_not_ok;
1994 	} else {
1995 		phy->cable_length = E1000_CABLE_LENGTH_UNDEFINED;
1996 		phy->local_rx = e1000_1000t_rx_status_undefined;
1997 		phy->remote_rx = e1000_1000t_rx_status_undefined;
1998 	}
1999 
2000 	return ret_val;
2001 }
2002 
2003 /**
2004  *  e1000_get_phy_info_ife - Retrieves various IFE PHY states
2005  *  @hw: pointer to the HW structure
2006  *
2007  *  Populates "phy" structure with various feature states.
2008  **/
2009 s32 e1000_get_phy_info_ife(struct e1000_hw *hw)
2010 {
2011 	struct e1000_phy_info *phy = &hw->phy;
2012 	s32 ret_val;
2013 	u16 data;
2014 	bool link;
2015 
2016 	ret_val = e1000e_phy_has_link_generic(hw, 1, 0, &link);
2017 	if (ret_val)
2018 		return ret_val;
2019 
2020 	if (!link) {
2021 		e_dbg("Phy info is only valid if link is up\n");
2022 		return -E1000_ERR_CONFIG;
2023 	}
2024 
2025 	ret_val = e1e_rphy(hw, IFE_PHY_SPECIAL_CONTROL, &data);
2026 	if (ret_val)
2027 		return ret_val;
2028 	phy->polarity_correction = !(data & IFE_PSC_AUTO_POLARITY_DISABLE);
2029 
2030 	if (phy->polarity_correction) {
2031 		ret_val = e1000_check_polarity_ife(hw);
2032 		if (ret_val)
2033 			return ret_val;
2034 	} else {
2035 		/* Polarity is forced */
2036 		phy->cable_polarity = ((data & IFE_PSC_FORCE_POLARITY)
2037 				       ? e1000_rev_polarity_reversed
2038 				       : e1000_rev_polarity_normal);
2039 	}
2040 
2041 	ret_val = e1e_rphy(hw, IFE_PHY_MDIX_CONTROL, &data);
2042 	if (ret_val)
2043 		return ret_val;
2044 
2045 	phy->is_mdix = !!(data & IFE_PMC_MDIX_STATUS);
2046 
2047 	/* The following parameters are undefined for 10/100 operation. */
2048 	phy->cable_length = E1000_CABLE_LENGTH_UNDEFINED;
2049 	phy->local_rx = e1000_1000t_rx_status_undefined;
2050 	phy->remote_rx = e1000_1000t_rx_status_undefined;
2051 
2052 	return 0;
2053 }
2054 
2055 /**
2056  *  e1000e_phy_sw_reset - PHY software reset
2057  *  @hw: pointer to the HW structure
2058  *
2059  *  Does a software reset of the PHY by reading the PHY control register and
2060  *  setting/write the control register reset bit to the PHY.
2061  **/
2062 s32 e1000e_phy_sw_reset(struct e1000_hw *hw)
2063 {
2064 	s32 ret_val;
2065 	u16 phy_ctrl;
2066 
2067 	ret_val = e1e_rphy(hw, MII_BMCR, &phy_ctrl);
2068 	if (ret_val)
2069 		return ret_val;
2070 
2071 	phy_ctrl |= BMCR_RESET;
2072 	ret_val = e1e_wphy(hw, MII_BMCR, phy_ctrl);
2073 	if (ret_val)
2074 		return ret_val;
2075 
2076 	udelay(1);
2077 
2078 	return ret_val;
2079 }
2080 
2081 /**
2082  *  e1000e_phy_hw_reset_generic - PHY hardware reset
2083  *  @hw: pointer to the HW structure
2084  *
2085  *  Verify the reset block is not blocking us from resetting.  Acquire
2086  *  semaphore (if necessary) and read/set/write the device control reset
2087  *  bit in the PHY.  Wait the appropriate delay time for the device to
2088  *  reset and release the semaphore (if necessary).
2089  **/
2090 s32 e1000e_phy_hw_reset_generic(struct e1000_hw *hw)
2091 {
2092 	struct e1000_phy_info *phy = &hw->phy;
2093 	s32 ret_val;
2094 	u32 ctrl;
2095 
2096 	if (phy->ops.check_reset_block) {
2097 		ret_val = phy->ops.check_reset_block(hw);
2098 		if (ret_val)
2099 			return 0;
2100 	}
2101 
2102 	ret_val = phy->ops.acquire(hw);
2103 	if (ret_val)
2104 		return ret_val;
2105 
2106 	ctrl = er32(CTRL);
2107 	ew32(CTRL, ctrl | E1000_CTRL_PHY_RST);
2108 	e1e_flush();
2109 
2110 	udelay(phy->reset_delay_us);
2111 
2112 	ew32(CTRL, ctrl);
2113 	e1e_flush();
2114 
2115 	usleep_range(150, 300);
2116 
2117 	phy->ops.release(hw);
2118 
2119 	return phy->ops.get_cfg_done(hw);
2120 }
2121 
2122 /**
2123  *  e1000e_get_cfg_done_generic - Generic configuration done
2124  *  @hw: pointer to the HW structure
2125  *
2126  *  Generic function to wait 10 milli-seconds for configuration to complete
2127  *  and return success.
2128  **/
2129 s32 e1000e_get_cfg_done_generic(struct e1000_hw __always_unused *hw)
2130 {
2131 	mdelay(10);
2132 
2133 	return 0;
2134 }
2135 
2136 /**
2137  *  e1000e_phy_init_script_igp3 - Inits the IGP3 PHY
2138  *  @hw: pointer to the HW structure
2139  *
2140  *  Initializes a Intel Gigabit PHY3 when an EEPROM is not present.
2141  **/
2142 s32 e1000e_phy_init_script_igp3(struct e1000_hw *hw)
2143 {
2144 	e_dbg("Running IGP 3 PHY init script\n");
2145 
2146 	/* PHY init IGP 3 */
2147 	/* Enable rise/fall, 10-mode work in class-A */
2148 	e1e_wphy(hw, 0x2F5B, 0x9018);
2149 	/* Remove all caps from Replica path filter */
2150 	e1e_wphy(hw, 0x2F52, 0x0000);
2151 	/* Bias trimming for ADC, AFE and Driver (Default) */
2152 	e1e_wphy(hw, 0x2FB1, 0x8B24);
2153 	/* Increase Hybrid poly bias */
2154 	e1e_wphy(hw, 0x2FB2, 0xF8F0);
2155 	/* Add 4% to Tx amplitude in Gig mode */
2156 	e1e_wphy(hw, 0x2010, 0x10B0);
2157 	/* Disable trimming (TTT) */
2158 	e1e_wphy(hw, 0x2011, 0x0000);
2159 	/* Poly DC correction to 94.6% + 2% for all channels */
2160 	e1e_wphy(hw, 0x20DD, 0x249A);
2161 	/* ABS DC correction to 95.9% */
2162 	e1e_wphy(hw, 0x20DE, 0x00D3);
2163 	/* BG temp curve trim */
2164 	e1e_wphy(hw, 0x28B4, 0x04CE);
2165 	/* Increasing ADC OPAMP stage 1 currents to max */
2166 	e1e_wphy(hw, 0x2F70, 0x29E4);
2167 	/* Force 1000 ( required for enabling PHY regs configuration) */
2168 	e1e_wphy(hw, 0x0000, 0x0140);
2169 	/* Set upd_freq to 6 */
2170 	e1e_wphy(hw, 0x1F30, 0x1606);
2171 	/* Disable NPDFE */
2172 	e1e_wphy(hw, 0x1F31, 0xB814);
2173 	/* Disable adaptive fixed FFE (Default) */
2174 	e1e_wphy(hw, 0x1F35, 0x002A);
2175 	/* Enable FFE hysteresis */
2176 	e1e_wphy(hw, 0x1F3E, 0x0067);
2177 	/* Fixed FFE for short cable lengths */
2178 	e1e_wphy(hw, 0x1F54, 0x0065);
2179 	/* Fixed FFE for medium cable lengths */
2180 	e1e_wphy(hw, 0x1F55, 0x002A);
2181 	/* Fixed FFE for long cable lengths */
2182 	e1e_wphy(hw, 0x1F56, 0x002A);
2183 	/* Enable Adaptive Clip Threshold */
2184 	e1e_wphy(hw, 0x1F72, 0x3FB0);
2185 	/* AHT reset limit to 1 */
2186 	e1e_wphy(hw, 0x1F76, 0xC0FF);
2187 	/* Set AHT master delay to 127 msec */
2188 	e1e_wphy(hw, 0x1F77, 0x1DEC);
2189 	/* Set scan bits for AHT */
2190 	e1e_wphy(hw, 0x1F78, 0xF9EF);
2191 	/* Set AHT Preset bits */
2192 	e1e_wphy(hw, 0x1F79, 0x0210);
2193 	/* Change integ_factor of channel A to 3 */
2194 	e1e_wphy(hw, 0x1895, 0x0003);
2195 	/* Change prop_factor of channels BCD to 8 */
2196 	e1e_wphy(hw, 0x1796, 0x0008);
2197 	/* Change cg_icount + enable integbp for channels BCD */
2198 	e1e_wphy(hw, 0x1798, 0xD008);
2199 	/* Change cg_icount + enable integbp + change prop_factor_master
2200 	 * to 8 for channel A
2201 	 */
2202 	e1e_wphy(hw, 0x1898, 0xD918);
2203 	/* Disable AHT in Slave mode on channel A */
2204 	e1e_wphy(hw, 0x187A, 0x0800);
2205 	/* Enable LPLU and disable AN to 1000 in non-D0a states,
2206 	 * Enable SPD+B2B
2207 	 */
2208 	e1e_wphy(hw, 0x0019, 0x008D);
2209 	/* Enable restart AN on an1000_dis change */
2210 	e1e_wphy(hw, 0x001B, 0x2080);
2211 	/* Enable wh_fifo read clock in 10/100 modes */
2212 	e1e_wphy(hw, 0x0014, 0x0045);
2213 	/* Restart AN, Speed selection is 1000 */
2214 	e1e_wphy(hw, 0x0000, 0x1340);
2215 
2216 	return 0;
2217 }
2218 
2219 /**
2220  *  e1000e_get_phy_type_from_id - Get PHY type from id
2221  *  @phy_id: phy_id read from the phy
2222  *
2223  *  Returns the phy type from the id.
2224  **/
2225 enum e1000_phy_type e1000e_get_phy_type_from_id(u32 phy_id)
2226 {
2227 	enum e1000_phy_type phy_type = e1000_phy_unknown;
2228 
2229 	switch (phy_id) {
2230 	case M88E1000_I_PHY_ID:
2231 	case M88E1000_E_PHY_ID:
2232 	case M88E1111_I_PHY_ID:
2233 	case M88E1011_I_PHY_ID:
2234 		phy_type = e1000_phy_m88;
2235 		break;
2236 	case IGP01E1000_I_PHY_ID:	/* IGP 1 & 2 share this */
2237 		phy_type = e1000_phy_igp_2;
2238 		break;
2239 	case GG82563_E_PHY_ID:
2240 		phy_type = e1000_phy_gg82563;
2241 		break;
2242 	case IGP03E1000_E_PHY_ID:
2243 		phy_type = e1000_phy_igp_3;
2244 		break;
2245 	case IFE_E_PHY_ID:
2246 	case IFE_PLUS_E_PHY_ID:
2247 	case IFE_C_E_PHY_ID:
2248 		phy_type = e1000_phy_ife;
2249 		break;
2250 	case BME1000_E_PHY_ID:
2251 	case BME1000_E_PHY_ID_R2:
2252 		phy_type = e1000_phy_bm;
2253 		break;
2254 	case I82578_E_PHY_ID:
2255 		phy_type = e1000_phy_82578;
2256 		break;
2257 	case I82577_E_PHY_ID:
2258 		phy_type = e1000_phy_82577;
2259 		break;
2260 	case I82579_E_PHY_ID:
2261 		phy_type = e1000_phy_82579;
2262 		break;
2263 	case I217_E_PHY_ID:
2264 		phy_type = e1000_phy_i217;
2265 		break;
2266 	default:
2267 		phy_type = e1000_phy_unknown;
2268 		break;
2269 	}
2270 	return phy_type;
2271 }
2272 
2273 /**
2274  *  e1000e_determine_phy_address - Determines PHY address.
2275  *  @hw: pointer to the HW structure
2276  *
2277  *  This uses a trial and error method to loop through possible PHY
2278  *  addresses. It tests each by reading the PHY ID registers and
2279  *  checking for a match.
2280  **/
2281 s32 e1000e_determine_phy_address(struct e1000_hw *hw)
2282 {
2283 	u32 phy_addr = 0;
2284 	u32 i;
2285 	enum e1000_phy_type phy_type = e1000_phy_unknown;
2286 
2287 	hw->phy.id = phy_type;
2288 
2289 	for (phy_addr = 0; phy_addr < E1000_MAX_PHY_ADDR; phy_addr++) {
2290 		hw->phy.addr = phy_addr;
2291 		i = 0;
2292 
2293 		do {
2294 			e1000e_get_phy_id(hw);
2295 			phy_type = e1000e_get_phy_type_from_id(hw->phy.id);
2296 
2297 			/* If phy_type is valid, break - we found our
2298 			 * PHY address
2299 			 */
2300 			if (phy_type != e1000_phy_unknown)
2301 				return 0;
2302 
2303 			usleep_range(1000, 2000);
2304 			i++;
2305 		} while (i < 10);
2306 	}
2307 
2308 	return -E1000_ERR_PHY_TYPE;
2309 }
2310 
2311 /**
2312  *  e1000_get_phy_addr_for_bm_page - Retrieve PHY page address
2313  *  @page: page to access
2314  *  @reg: register to check
2315  *
2316  *  Returns the phy address for the page requested.
2317  **/
2318 static u32 e1000_get_phy_addr_for_bm_page(u32 page, u32 reg)
2319 {
2320 	u32 phy_addr = 2;
2321 
2322 	if ((page >= 768) || (page == 0 && reg == 25) || (reg == 31))
2323 		phy_addr = 1;
2324 
2325 	return phy_addr;
2326 }
2327 
2328 /**
2329  *  e1000e_write_phy_reg_bm - Write BM PHY register
2330  *  @hw: pointer to the HW structure
2331  *  @offset: register offset to write to
2332  *  @data: data to write at register offset
2333  *
2334  *  Acquires semaphore, if necessary, then writes the data to PHY register
2335  *  at the offset.  Release any acquired semaphores before exiting.
2336  **/
2337 s32 e1000e_write_phy_reg_bm(struct e1000_hw *hw, u32 offset, u16 data)
2338 {
2339 	s32 ret_val;
2340 	u32 page = offset >> IGP_PAGE_SHIFT;
2341 
2342 	ret_val = hw->phy.ops.acquire(hw);
2343 	if (ret_val)
2344 		return ret_val;
2345 
2346 	/* Page 800 works differently than the rest so it has its own func */
2347 	if (page == BM_WUC_PAGE) {
2348 		ret_val = e1000_access_phy_wakeup_reg_bm(hw, offset, &data,
2349 							 false, false);
2350 		goto release;
2351 	}
2352 
2353 	hw->phy.addr = e1000_get_phy_addr_for_bm_page(page, offset);
2354 
2355 	if (offset > MAX_PHY_MULTI_PAGE_REG) {
2356 		u32 page_shift, page_select;
2357 
2358 		/* Page select is register 31 for phy address 1 and 22 for
2359 		 * phy address 2 and 3. Page select is shifted only for
2360 		 * phy address 1.
2361 		 */
2362 		if (hw->phy.addr == 1) {
2363 			page_shift = IGP_PAGE_SHIFT;
2364 			page_select = IGP01E1000_PHY_PAGE_SELECT;
2365 		} else {
2366 			page_shift = 0;
2367 			page_select = BM_PHY_PAGE_SELECT;
2368 		}
2369 
2370 		/* Page is shifted left, PHY expects (page x 32) */
2371 		ret_val = e1000e_write_phy_reg_mdic(hw, page_select,
2372 						    (page << page_shift));
2373 		if (ret_val)
2374 			goto release;
2375 	}
2376 
2377 	ret_val = e1000e_write_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & offset,
2378 					    data);
2379 
2380 release:
2381 	hw->phy.ops.release(hw);
2382 	return ret_val;
2383 }
2384 
2385 /**
2386  *  e1000e_read_phy_reg_bm - Read BM PHY register
2387  *  @hw: pointer to the HW structure
2388  *  @offset: register offset to be read
2389  *  @data: pointer to the read data
2390  *
2391  *  Acquires semaphore, if necessary, then reads the PHY register at offset
2392  *  and storing the retrieved information in data.  Release any acquired
2393  *  semaphores before exiting.
2394  **/
2395 s32 e1000e_read_phy_reg_bm(struct e1000_hw *hw, u32 offset, u16 *data)
2396 {
2397 	s32 ret_val;
2398 	u32 page = offset >> IGP_PAGE_SHIFT;
2399 
2400 	ret_val = hw->phy.ops.acquire(hw);
2401 	if (ret_val)
2402 		return ret_val;
2403 
2404 	/* Page 800 works differently than the rest so it has its own func */
2405 	if (page == BM_WUC_PAGE) {
2406 		ret_val = e1000_access_phy_wakeup_reg_bm(hw, offset, data,
2407 							 true, false);
2408 		goto release;
2409 	}
2410 
2411 	hw->phy.addr = e1000_get_phy_addr_for_bm_page(page, offset);
2412 
2413 	if (offset > MAX_PHY_MULTI_PAGE_REG) {
2414 		u32 page_shift, page_select;
2415 
2416 		/* Page select is register 31 for phy address 1 and 22 for
2417 		 * phy address 2 and 3. Page select is shifted only for
2418 		 * phy address 1.
2419 		 */
2420 		if (hw->phy.addr == 1) {
2421 			page_shift = IGP_PAGE_SHIFT;
2422 			page_select = IGP01E1000_PHY_PAGE_SELECT;
2423 		} else {
2424 			page_shift = 0;
2425 			page_select = BM_PHY_PAGE_SELECT;
2426 		}
2427 
2428 		/* Page is shifted left, PHY expects (page x 32) */
2429 		ret_val = e1000e_write_phy_reg_mdic(hw, page_select,
2430 						    (page << page_shift));
2431 		if (ret_val)
2432 			goto release;
2433 	}
2434 
2435 	ret_val = e1000e_read_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & offset,
2436 					   data);
2437 release:
2438 	hw->phy.ops.release(hw);
2439 	return ret_val;
2440 }
2441 
2442 /**
2443  *  e1000e_read_phy_reg_bm2 - Read BM PHY register
2444  *  @hw: pointer to the HW structure
2445  *  @offset: register offset to be read
2446  *  @data: pointer to the read data
2447  *
2448  *  Acquires semaphore, if necessary, then reads the PHY register at offset
2449  *  and storing the retrieved information in data.  Release any acquired
2450  *  semaphores before exiting.
2451  **/
2452 s32 e1000e_read_phy_reg_bm2(struct e1000_hw *hw, u32 offset, u16 *data)
2453 {
2454 	s32 ret_val;
2455 	u16 page = (u16)(offset >> IGP_PAGE_SHIFT);
2456 
2457 	ret_val = hw->phy.ops.acquire(hw);
2458 	if (ret_val)
2459 		return ret_val;
2460 
2461 	/* Page 800 works differently than the rest so it has its own func */
2462 	if (page == BM_WUC_PAGE) {
2463 		ret_val = e1000_access_phy_wakeup_reg_bm(hw, offset, data,
2464 							 true, false);
2465 		goto release;
2466 	}
2467 
2468 	hw->phy.addr = 1;
2469 
2470 	if (offset > MAX_PHY_MULTI_PAGE_REG) {
2471 		/* Page is shifted left, PHY expects (page x 32) */
2472 		ret_val = e1000e_write_phy_reg_mdic(hw, BM_PHY_PAGE_SELECT,
2473 						    page);
2474 
2475 		if (ret_val)
2476 			goto release;
2477 	}
2478 
2479 	ret_val = e1000e_read_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & offset,
2480 					   data);
2481 release:
2482 	hw->phy.ops.release(hw);
2483 	return ret_val;
2484 }
2485 
2486 /**
2487  *  e1000e_write_phy_reg_bm2 - Write BM PHY register
2488  *  @hw: pointer to the HW structure
2489  *  @offset: register offset to write to
2490  *  @data: data to write at register offset
2491  *
2492  *  Acquires semaphore, if necessary, then writes the data to PHY register
2493  *  at the offset.  Release any acquired semaphores before exiting.
2494  **/
2495 s32 e1000e_write_phy_reg_bm2(struct e1000_hw *hw, u32 offset, u16 data)
2496 {
2497 	s32 ret_val;
2498 	u16 page = (u16)(offset >> IGP_PAGE_SHIFT);
2499 
2500 	ret_val = hw->phy.ops.acquire(hw);
2501 	if (ret_val)
2502 		return ret_val;
2503 
2504 	/* Page 800 works differently than the rest so it has its own func */
2505 	if (page == BM_WUC_PAGE) {
2506 		ret_val = e1000_access_phy_wakeup_reg_bm(hw, offset, &data,
2507 							 false, false);
2508 		goto release;
2509 	}
2510 
2511 	hw->phy.addr = 1;
2512 
2513 	if (offset > MAX_PHY_MULTI_PAGE_REG) {
2514 		/* Page is shifted left, PHY expects (page x 32) */
2515 		ret_val = e1000e_write_phy_reg_mdic(hw, BM_PHY_PAGE_SELECT,
2516 						    page);
2517 
2518 		if (ret_val)
2519 			goto release;
2520 	}
2521 
2522 	ret_val = e1000e_write_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & offset,
2523 					    data);
2524 
2525 release:
2526 	hw->phy.ops.release(hw);
2527 	return ret_val;
2528 }
2529 
2530 /**
2531  *  e1000_enable_phy_wakeup_reg_access_bm - enable access to BM wakeup registers
2532  *  @hw: pointer to the HW structure
2533  *  @phy_reg: pointer to store original contents of BM_WUC_ENABLE_REG
2534  *
2535  *  Assumes semaphore already acquired and phy_reg points to a valid memory
2536  *  address to store contents of the BM_WUC_ENABLE_REG register.
2537  **/
2538 s32 e1000_enable_phy_wakeup_reg_access_bm(struct e1000_hw *hw, u16 *phy_reg)
2539 {
2540 	s32 ret_val;
2541 	u16 temp;
2542 
2543 	/* All page select, port ctrl and wakeup registers use phy address 1 */
2544 	hw->phy.addr = 1;
2545 
2546 	/* Select Port Control Registers page */
2547 	ret_val = e1000_set_page_igp(hw, (BM_PORT_CTRL_PAGE << IGP_PAGE_SHIFT));
2548 	if (ret_val) {
2549 		e_dbg("Could not set Port Control page\n");
2550 		return ret_val;
2551 	}
2552 
2553 	ret_val = e1000e_read_phy_reg_mdic(hw, BM_WUC_ENABLE_REG, phy_reg);
2554 	if (ret_val) {
2555 		e_dbg("Could not read PHY register %d.%d\n",
2556 		      BM_PORT_CTRL_PAGE, BM_WUC_ENABLE_REG);
2557 		return ret_val;
2558 	}
2559 
2560 	/* Enable both PHY wakeup mode and Wakeup register page writes.
2561 	 * Prevent a power state change by disabling ME and Host PHY wakeup.
2562 	 */
2563 	temp = *phy_reg;
2564 	temp |= BM_WUC_ENABLE_BIT;
2565 	temp &= ~(BM_WUC_ME_WU_BIT | BM_WUC_HOST_WU_BIT);
2566 
2567 	ret_val = e1000e_write_phy_reg_mdic(hw, BM_WUC_ENABLE_REG, temp);
2568 	if (ret_val) {
2569 		e_dbg("Could not write PHY register %d.%d\n",
2570 		      BM_PORT_CTRL_PAGE, BM_WUC_ENABLE_REG);
2571 		return ret_val;
2572 	}
2573 
2574 	/* Select Host Wakeup Registers page - caller now able to write
2575 	 * registers on the Wakeup registers page
2576 	 */
2577 	return e1000_set_page_igp(hw, (BM_WUC_PAGE << IGP_PAGE_SHIFT));
2578 }
2579 
2580 /**
2581  *  e1000_disable_phy_wakeup_reg_access_bm - disable access to BM wakeup regs
2582  *  @hw: pointer to the HW structure
2583  *  @phy_reg: pointer to original contents of BM_WUC_ENABLE_REG
2584  *
2585  *  Restore BM_WUC_ENABLE_REG to its original value.
2586  *
2587  *  Assumes semaphore already acquired and *phy_reg is the contents of the
2588  *  BM_WUC_ENABLE_REG before register(s) on BM_WUC_PAGE were accessed by
2589  *  caller.
2590  **/
2591 s32 e1000_disable_phy_wakeup_reg_access_bm(struct e1000_hw *hw, u16 *phy_reg)
2592 {
2593 	s32 ret_val;
2594 
2595 	/* Select Port Control Registers page */
2596 	ret_val = e1000_set_page_igp(hw, (BM_PORT_CTRL_PAGE << IGP_PAGE_SHIFT));
2597 	if (ret_val) {
2598 		e_dbg("Could not set Port Control page\n");
2599 		return ret_val;
2600 	}
2601 
2602 	/* Restore 769.17 to its original value */
2603 	ret_val = e1000e_write_phy_reg_mdic(hw, BM_WUC_ENABLE_REG, *phy_reg);
2604 	if (ret_val)
2605 		e_dbg("Could not restore PHY register %d.%d\n",
2606 		      BM_PORT_CTRL_PAGE, BM_WUC_ENABLE_REG);
2607 
2608 	return ret_val;
2609 }
2610 
2611 /**
2612  *  e1000_access_phy_wakeup_reg_bm - Read/write BM PHY wakeup register
2613  *  @hw: pointer to the HW structure
2614  *  @offset: register offset to be read or written
2615  *  @data: pointer to the data to read or write
2616  *  @read: determines if operation is read or write
2617  *  @page_set: BM_WUC_PAGE already set and access enabled
2618  *
2619  *  Read the PHY register at offset and store the retrieved information in
2620  *  data, or write data to PHY register at offset.  Note the procedure to
2621  *  access the PHY wakeup registers is different than reading the other PHY
2622  *  registers. It works as such:
2623  *  1) Set 769.17.2 (page 769, register 17, bit 2) = 1
2624  *  2) Set page to 800 for host (801 if we were manageability)
2625  *  3) Write the address using the address opcode (0x11)
2626  *  4) Read or write the data using the data opcode (0x12)
2627  *  5) Restore 769.17.2 to its original value
2628  *
2629  *  Steps 1 and 2 are done by e1000_enable_phy_wakeup_reg_access_bm() and
2630  *  step 5 is done by e1000_disable_phy_wakeup_reg_access_bm().
2631  *
2632  *  Assumes semaphore is already acquired.  When page_set==true, assumes
2633  *  the PHY page is set to BM_WUC_PAGE (i.e. a function in the call stack
2634  *  is responsible for calls to e1000_[enable|disable]_phy_wakeup_reg_bm()).
2635  **/
2636 static s32 e1000_access_phy_wakeup_reg_bm(struct e1000_hw *hw, u32 offset,
2637 					  u16 *data, bool read, bool page_set)
2638 {
2639 	s32 ret_val;
2640 	u16 reg = BM_PHY_REG_NUM(offset);
2641 	u16 page = BM_PHY_REG_PAGE(offset);
2642 	u16 phy_reg = 0;
2643 
2644 	/* Gig must be disabled for MDIO accesses to Host Wakeup reg page */
2645 	if ((hw->mac.type == e1000_pchlan) &&
2646 	    (!(er32(PHY_CTRL) & E1000_PHY_CTRL_GBE_DISABLE)))
2647 		e_dbg("Attempting to access page %d while gig enabled.\n",
2648 		      page);
2649 
2650 	if (!page_set) {
2651 		/* Enable access to PHY wakeup registers */
2652 		ret_val = e1000_enable_phy_wakeup_reg_access_bm(hw, &phy_reg);
2653 		if (ret_val) {
2654 			e_dbg("Could not enable PHY wakeup reg access\n");
2655 			return ret_val;
2656 		}
2657 	}
2658 
2659 	e_dbg("Accessing PHY page %d reg 0x%x\n", page, reg);
2660 
2661 	/* Write the Wakeup register page offset value using opcode 0x11 */
2662 	ret_val = e1000e_write_phy_reg_mdic(hw, BM_WUC_ADDRESS_OPCODE, reg);
2663 	if (ret_val) {
2664 		e_dbg("Could not write address opcode to page %d\n", page);
2665 		return ret_val;
2666 	}
2667 
2668 	if (read) {
2669 		/* Read the Wakeup register page value using opcode 0x12 */
2670 		ret_val = e1000e_read_phy_reg_mdic(hw, BM_WUC_DATA_OPCODE,
2671 						   data);
2672 	} else {
2673 		/* Write the Wakeup register page value using opcode 0x12 */
2674 		ret_val = e1000e_write_phy_reg_mdic(hw, BM_WUC_DATA_OPCODE,
2675 						    *data);
2676 	}
2677 
2678 	if (ret_val) {
2679 		e_dbg("Could not access PHY reg %d.%d\n", page, reg);
2680 		return ret_val;
2681 	}
2682 
2683 	if (!page_set)
2684 		ret_val = e1000_disable_phy_wakeup_reg_access_bm(hw, &phy_reg);
2685 
2686 	return ret_val;
2687 }
2688 
2689 /**
2690  * e1000_power_up_phy_copper - Restore copper link in case of PHY power down
2691  * @hw: pointer to the HW structure
2692  *
2693  * In the case of a PHY power down to save power, or to turn off link during a
2694  * driver unload, or wake on lan is not enabled, restore the link to previous
2695  * settings.
2696  **/
2697 void e1000_power_up_phy_copper(struct e1000_hw *hw)
2698 {
2699 	u16 mii_reg = 0;
2700 
2701 	/* The PHY will retain its settings across a power down/up cycle */
2702 	e1e_rphy(hw, MII_BMCR, &mii_reg);
2703 	mii_reg &= ~BMCR_PDOWN;
2704 	e1e_wphy(hw, MII_BMCR, mii_reg);
2705 }
2706 
2707 /**
2708  * e1000_power_down_phy_copper - Restore copper link in case of PHY power down
2709  * @hw: pointer to the HW structure
2710  *
2711  * In the case of a PHY power down to save power, or to turn off link during a
2712  * driver unload, or wake on lan is not enabled, restore the link to previous
2713  * settings.
2714  **/
2715 void e1000_power_down_phy_copper(struct e1000_hw *hw)
2716 {
2717 	u16 mii_reg = 0;
2718 
2719 	/* The PHY will retain its settings across a power down/up cycle */
2720 	e1e_rphy(hw, MII_BMCR, &mii_reg);
2721 	mii_reg |= BMCR_PDOWN;
2722 	e1e_wphy(hw, MII_BMCR, mii_reg);
2723 	usleep_range(1000, 2000);
2724 }
2725 
2726 /**
2727  *  __e1000_read_phy_reg_hv -  Read HV PHY register
2728  *  @hw: pointer to the HW structure
2729  *  @offset: register offset to be read
2730  *  @data: pointer to the read data
2731  *  @locked: semaphore has already been acquired or not
2732  *  @page_set: BM_WUC_PAGE already set and access enabled
2733  *
2734  *  Acquires semaphore, if necessary, then reads the PHY register at offset
2735  *  and stores the retrieved information in data.  Release any acquired
2736  *  semaphore before exiting.
2737  **/
2738 static s32 __e1000_read_phy_reg_hv(struct e1000_hw *hw, u32 offset, u16 *data,
2739 				   bool locked, bool page_set)
2740 {
2741 	s32 ret_val;
2742 	u16 page = BM_PHY_REG_PAGE(offset);
2743 	u16 reg = BM_PHY_REG_NUM(offset);
2744 	u32 phy_addr = hw->phy.addr = e1000_get_phy_addr_for_hv_page(page);
2745 
2746 	if (!locked) {
2747 		ret_val = hw->phy.ops.acquire(hw);
2748 		if (ret_val)
2749 			return ret_val;
2750 	}
2751 
2752 	/* Page 800 works differently than the rest so it has its own func */
2753 	if (page == BM_WUC_PAGE) {
2754 		ret_val = e1000_access_phy_wakeup_reg_bm(hw, offset, data,
2755 							 true, page_set);
2756 		goto out;
2757 	}
2758 
2759 	if (page > 0 && page < HV_INTC_FC_PAGE_START) {
2760 		ret_val = e1000_access_phy_debug_regs_hv(hw, offset,
2761 							 data, true);
2762 		goto out;
2763 	}
2764 
2765 	if (!page_set) {
2766 		if (page == HV_INTC_FC_PAGE_START)
2767 			page = 0;
2768 
2769 		if (reg > MAX_PHY_MULTI_PAGE_REG) {
2770 			/* Page is shifted left, PHY expects (page x 32) */
2771 			ret_val = e1000_set_page_igp(hw,
2772 						     (page << IGP_PAGE_SHIFT));
2773 
2774 			hw->phy.addr = phy_addr;
2775 
2776 			if (ret_val)
2777 				goto out;
2778 		}
2779 	}
2780 
2781 	e_dbg("reading PHY page %d (or 0x%x shifted) reg 0x%x\n", page,
2782 	      page << IGP_PAGE_SHIFT, reg);
2783 
2784 	ret_val = e1000e_read_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & reg, data);
2785 out:
2786 	if (!locked)
2787 		hw->phy.ops.release(hw);
2788 
2789 	return ret_val;
2790 }
2791 
2792 /**
2793  *  e1000_read_phy_reg_hv -  Read HV PHY register
2794  *  @hw: pointer to the HW structure
2795  *  @offset: register offset to be read
2796  *  @data: pointer to the read data
2797  *
2798  *  Acquires semaphore then reads the PHY register at offset and stores
2799  *  the retrieved information in data.  Release the acquired semaphore
2800  *  before exiting.
2801  **/
2802 s32 e1000_read_phy_reg_hv(struct e1000_hw *hw, u32 offset, u16 *data)
2803 {
2804 	return __e1000_read_phy_reg_hv(hw, offset, data, false, false);
2805 }
2806 
2807 /**
2808  *  e1000_read_phy_reg_hv_locked -  Read HV PHY register
2809  *  @hw: pointer to the HW structure
2810  *  @offset: register offset to be read
2811  *  @data: pointer to the read data
2812  *
2813  *  Reads the PHY register at offset and stores the retrieved information
2814  *  in data.  Assumes semaphore already acquired.
2815  **/
2816 s32 e1000_read_phy_reg_hv_locked(struct e1000_hw *hw, u32 offset, u16 *data)
2817 {
2818 	return __e1000_read_phy_reg_hv(hw, offset, data, true, false);
2819 }
2820 
2821 /**
2822  *  e1000_read_phy_reg_page_hv - Read HV PHY register
2823  *  @hw: pointer to the HW structure
2824  *  @offset: register offset to write to
2825  *  @data: data to write at register offset
2826  *
2827  *  Reads the PHY register at offset and stores the retrieved information
2828  *  in data.  Assumes semaphore already acquired and page already set.
2829  **/
2830 s32 e1000_read_phy_reg_page_hv(struct e1000_hw *hw, u32 offset, u16 *data)
2831 {
2832 	return __e1000_read_phy_reg_hv(hw, offset, data, true, true);
2833 }
2834 
2835 /**
2836  *  __e1000_write_phy_reg_hv - Write HV PHY register
2837  *  @hw: pointer to the HW structure
2838  *  @offset: register offset to write to
2839  *  @data: data to write at register offset
2840  *  @locked: semaphore has already been acquired or not
2841  *  @page_set: BM_WUC_PAGE already set and access enabled
2842  *
2843  *  Acquires semaphore, if necessary, then writes the data to PHY register
2844  *  at the offset.  Release any acquired semaphores before exiting.
2845  **/
2846 static s32 __e1000_write_phy_reg_hv(struct e1000_hw *hw, u32 offset, u16 data,
2847 				    bool locked, bool page_set)
2848 {
2849 	s32 ret_val;
2850 	u16 page = BM_PHY_REG_PAGE(offset);
2851 	u16 reg = BM_PHY_REG_NUM(offset);
2852 	u32 phy_addr = hw->phy.addr = e1000_get_phy_addr_for_hv_page(page);
2853 
2854 	if (!locked) {
2855 		ret_val = hw->phy.ops.acquire(hw);
2856 		if (ret_val)
2857 			return ret_val;
2858 	}
2859 
2860 	/* Page 800 works differently than the rest so it has its own func */
2861 	if (page == BM_WUC_PAGE) {
2862 		ret_val = e1000_access_phy_wakeup_reg_bm(hw, offset, &data,
2863 							 false, page_set);
2864 		goto out;
2865 	}
2866 
2867 	if (page > 0 && page < HV_INTC_FC_PAGE_START) {
2868 		ret_val = e1000_access_phy_debug_regs_hv(hw, offset,
2869 							 &data, false);
2870 		goto out;
2871 	}
2872 
2873 	if (!page_set) {
2874 		if (page == HV_INTC_FC_PAGE_START)
2875 			page = 0;
2876 
2877 		/* Workaround MDIO accesses being disabled after entering IEEE
2878 		 * Power Down (when bit 11 of the PHY Control register is set)
2879 		 */
2880 		if ((hw->phy.type == e1000_phy_82578) &&
2881 		    (hw->phy.revision >= 1) &&
2882 		    (hw->phy.addr == 2) &&
2883 		    !(MAX_PHY_REG_ADDRESS & reg) && (data & BIT(11))) {
2884 			u16 data2 = 0x7EFF;
2885 
2886 			ret_val = e1000_access_phy_debug_regs_hv(hw,
2887 								 BIT(6) | 0x3,
2888 								 &data2, false);
2889 			if (ret_val)
2890 				goto out;
2891 		}
2892 
2893 		if (reg > MAX_PHY_MULTI_PAGE_REG) {
2894 			/* Page is shifted left, PHY expects (page x 32) */
2895 			ret_val = e1000_set_page_igp(hw,
2896 						     (page << IGP_PAGE_SHIFT));
2897 
2898 			hw->phy.addr = phy_addr;
2899 
2900 			if (ret_val)
2901 				goto out;
2902 		}
2903 	}
2904 
2905 	e_dbg("writing PHY page %d (or 0x%x shifted) reg 0x%x\n", page,
2906 	      page << IGP_PAGE_SHIFT, reg);
2907 
2908 	ret_val = e1000e_write_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & reg,
2909 					    data);
2910 
2911 out:
2912 	if (!locked)
2913 		hw->phy.ops.release(hw);
2914 
2915 	return ret_val;
2916 }
2917 
2918 /**
2919  *  e1000_write_phy_reg_hv - Write HV PHY register
2920  *  @hw: pointer to the HW structure
2921  *  @offset: register offset to write to
2922  *  @data: data to write at register offset
2923  *
2924  *  Acquires semaphore then writes the data to PHY register at the offset.
2925  *  Release the acquired semaphores before exiting.
2926  **/
2927 s32 e1000_write_phy_reg_hv(struct e1000_hw *hw, u32 offset, u16 data)
2928 {
2929 	return __e1000_write_phy_reg_hv(hw, offset, data, false, false);
2930 }
2931 
2932 /**
2933  *  e1000_write_phy_reg_hv_locked - Write HV PHY register
2934  *  @hw: pointer to the HW structure
2935  *  @offset: register offset to write to
2936  *  @data: data to write at register offset
2937  *
2938  *  Writes the data to PHY register at the offset.  Assumes semaphore
2939  *  already acquired.
2940  **/
2941 s32 e1000_write_phy_reg_hv_locked(struct e1000_hw *hw, u32 offset, u16 data)
2942 {
2943 	return __e1000_write_phy_reg_hv(hw, offset, data, true, false);
2944 }
2945 
2946 /**
2947  *  e1000_write_phy_reg_page_hv - Write HV PHY register
2948  *  @hw: pointer to the HW structure
2949  *  @offset: register offset to write to
2950  *  @data: data to write at register offset
2951  *
2952  *  Writes the data to PHY register at the offset.  Assumes semaphore
2953  *  already acquired and page already set.
2954  **/
2955 s32 e1000_write_phy_reg_page_hv(struct e1000_hw *hw, u32 offset, u16 data)
2956 {
2957 	return __e1000_write_phy_reg_hv(hw, offset, data, true, true);
2958 }
2959 
2960 /**
2961  *  e1000_get_phy_addr_for_hv_page - Get PHY address based on page
2962  *  @page: page to be accessed
2963  **/
2964 static u32 e1000_get_phy_addr_for_hv_page(u32 page)
2965 {
2966 	u32 phy_addr = 2;
2967 
2968 	if (page >= HV_INTC_FC_PAGE_START)
2969 		phy_addr = 1;
2970 
2971 	return phy_addr;
2972 }
2973 
2974 /**
2975  *  e1000_access_phy_debug_regs_hv - Read HV PHY vendor specific high registers
2976  *  @hw: pointer to the HW structure
2977  *  @offset: register offset to be read or written
2978  *  @data: pointer to the data to be read or written
2979  *  @read: determines if operation is read or write
2980  *
2981  *  Reads the PHY register at offset and stores the retrieved information
2982  *  in data.  Assumes semaphore already acquired.  Note that the procedure
2983  *  to access these regs uses the address port and data port to read/write.
2984  *  These accesses done with PHY address 2 and without using pages.
2985  **/
2986 static s32 e1000_access_phy_debug_regs_hv(struct e1000_hw *hw, u32 offset,
2987 					  u16 *data, bool read)
2988 {
2989 	s32 ret_val;
2990 	u32 addr_reg;
2991 	u32 data_reg;
2992 
2993 	/* This takes care of the difference with desktop vs mobile phy */
2994 	addr_reg = ((hw->phy.type == e1000_phy_82578) ?
2995 		    I82578_ADDR_REG : I82577_ADDR_REG);
2996 	data_reg = addr_reg + 1;
2997 
2998 	/* All operations in this function are phy address 2 */
2999 	hw->phy.addr = 2;
3000 
3001 	/* masking with 0x3F to remove the page from offset */
3002 	ret_val = e1000e_write_phy_reg_mdic(hw, addr_reg, (u16)offset & 0x3F);
3003 	if (ret_val) {
3004 		e_dbg("Could not write the Address Offset port register\n");
3005 		return ret_val;
3006 	}
3007 
3008 	/* Read or write the data value next */
3009 	if (read)
3010 		ret_val = e1000e_read_phy_reg_mdic(hw, data_reg, data);
3011 	else
3012 		ret_val = e1000e_write_phy_reg_mdic(hw, data_reg, *data);
3013 
3014 	if (ret_val)
3015 		e_dbg("Could not access the Data port register\n");
3016 
3017 	return ret_val;
3018 }
3019 
3020 /**
3021  *  e1000_link_stall_workaround_hv - Si workaround
3022  *  @hw: pointer to the HW structure
3023  *
3024  *  This function works around a Si bug where the link partner can get
3025  *  a link up indication before the PHY does.  If small packets are sent
3026  *  by the link partner they can be placed in the packet buffer without
3027  *  being properly accounted for by the PHY and will stall preventing
3028  *  further packets from being received.  The workaround is to clear the
3029  *  packet buffer after the PHY detects link up.
3030  **/
3031 s32 e1000_link_stall_workaround_hv(struct e1000_hw *hw)
3032 {
3033 	s32 ret_val = 0;
3034 	u16 data;
3035 
3036 	if (hw->phy.type != e1000_phy_82578)
3037 		return 0;
3038 
3039 	/* Do not apply workaround if in PHY loopback bit 14 set */
3040 	e1e_rphy(hw, MII_BMCR, &data);
3041 	if (data & BMCR_LOOPBACK)
3042 		return 0;
3043 
3044 	/* check if link is up and at 1Gbps */
3045 	ret_val = e1e_rphy(hw, BM_CS_STATUS, &data);
3046 	if (ret_val)
3047 		return ret_val;
3048 
3049 	data &= (BM_CS_STATUS_LINK_UP | BM_CS_STATUS_RESOLVED |
3050 		 BM_CS_STATUS_SPEED_MASK);
3051 
3052 	if (data != (BM_CS_STATUS_LINK_UP | BM_CS_STATUS_RESOLVED |
3053 		     BM_CS_STATUS_SPEED_1000))
3054 		return 0;
3055 
3056 	msleep(200);
3057 
3058 	/* flush the packets in the fifo buffer */
3059 	ret_val = e1e_wphy(hw, HV_MUX_DATA_CTRL,
3060 			   (HV_MUX_DATA_CTRL_GEN_TO_MAC |
3061 			    HV_MUX_DATA_CTRL_FORCE_SPEED));
3062 	if (ret_val)
3063 		return ret_val;
3064 
3065 	return e1e_wphy(hw, HV_MUX_DATA_CTRL, HV_MUX_DATA_CTRL_GEN_TO_MAC);
3066 }
3067 
3068 /**
3069  *  e1000_check_polarity_82577 - Checks the polarity.
3070  *  @hw: pointer to the HW structure
3071  *
3072  *  Success returns 0, Failure returns -E1000_ERR_PHY (-2)
3073  *
3074  *  Polarity is determined based on the PHY specific status register.
3075  **/
3076 s32 e1000_check_polarity_82577(struct e1000_hw *hw)
3077 {
3078 	struct e1000_phy_info *phy = &hw->phy;
3079 	s32 ret_val;
3080 	u16 data;
3081 
3082 	ret_val = e1e_rphy(hw, I82577_PHY_STATUS_2, &data);
3083 
3084 	if (!ret_val)
3085 		phy->cable_polarity = ((data & I82577_PHY_STATUS2_REV_POLARITY)
3086 				       ? e1000_rev_polarity_reversed
3087 				       : e1000_rev_polarity_normal);
3088 
3089 	return ret_val;
3090 }
3091 
3092 /**
3093  *  e1000_phy_force_speed_duplex_82577 - Force speed/duplex for I82577 PHY
3094  *  @hw: pointer to the HW structure
3095  *
3096  *  Calls the PHY setup function to force speed and duplex.
3097  **/
3098 s32 e1000_phy_force_speed_duplex_82577(struct e1000_hw *hw)
3099 {
3100 	struct e1000_phy_info *phy = &hw->phy;
3101 	s32 ret_val;
3102 	u16 phy_data;
3103 	bool link;
3104 
3105 	ret_val = e1e_rphy(hw, MII_BMCR, &phy_data);
3106 	if (ret_val)
3107 		return ret_val;
3108 
3109 	e1000e_phy_force_speed_duplex_setup(hw, &phy_data);
3110 
3111 	ret_val = e1e_wphy(hw, MII_BMCR, phy_data);
3112 	if (ret_val)
3113 		return ret_val;
3114 
3115 	udelay(1);
3116 
3117 	if (phy->autoneg_wait_to_complete) {
3118 		e_dbg("Waiting for forced speed/duplex link on 82577 phy\n");
3119 
3120 		ret_val = e1000e_phy_has_link_generic(hw, PHY_FORCE_LIMIT,
3121 						      100000, &link);
3122 		if (ret_val)
3123 			return ret_val;
3124 
3125 		if (!link)
3126 			e_dbg("Link taking longer than expected.\n");
3127 
3128 		/* Try once more */
3129 		ret_val = e1000e_phy_has_link_generic(hw, PHY_FORCE_LIMIT,
3130 						      100000, &link);
3131 	}
3132 
3133 	return ret_val;
3134 }
3135 
3136 /**
3137  *  e1000_get_phy_info_82577 - Retrieve I82577 PHY information
3138  *  @hw: pointer to the HW structure
3139  *
3140  *  Read PHY status to determine if link is up.  If link is up, then
3141  *  set/determine 10base-T extended distance and polarity correction.  Read
3142  *  PHY port status to determine MDI/MDIx and speed.  Based on the speed,
3143  *  determine on the cable length, local and remote receiver.
3144  **/
3145 s32 e1000_get_phy_info_82577(struct e1000_hw *hw)
3146 {
3147 	struct e1000_phy_info *phy = &hw->phy;
3148 	s32 ret_val;
3149 	u16 data;
3150 	bool link;
3151 
3152 	ret_val = e1000e_phy_has_link_generic(hw, 1, 0, &link);
3153 	if (ret_val)
3154 		return ret_val;
3155 
3156 	if (!link) {
3157 		e_dbg("Phy info is only valid if link is up\n");
3158 		return -E1000_ERR_CONFIG;
3159 	}
3160 
3161 	phy->polarity_correction = true;
3162 
3163 	ret_val = e1000_check_polarity_82577(hw);
3164 	if (ret_val)
3165 		return ret_val;
3166 
3167 	ret_val = e1e_rphy(hw, I82577_PHY_STATUS_2, &data);
3168 	if (ret_val)
3169 		return ret_val;
3170 
3171 	phy->is_mdix = !!(data & I82577_PHY_STATUS2_MDIX);
3172 
3173 	if ((data & I82577_PHY_STATUS2_SPEED_MASK) ==
3174 	    I82577_PHY_STATUS2_SPEED_1000MBPS) {
3175 		ret_val = hw->phy.ops.get_cable_length(hw);
3176 		if (ret_val)
3177 			return ret_val;
3178 
3179 		ret_val = e1e_rphy(hw, MII_STAT1000, &data);
3180 		if (ret_val)
3181 			return ret_val;
3182 
3183 		phy->local_rx = (data & LPA_1000LOCALRXOK)
3184 		    ? e1000_1000t_rx_status_ok : e1000_1000t_rx_status_not_ok;
3185 
3186 		phy->remote_rx = (data & LPA_1000REMRXOK)
3187 		    ? e1000_1000t_rx_status_ok : e1000_1000t_rx_status_not_ok;
3188 	} else {
3189 		phy->cable_length = E1000_CABLE_LENGTH_UNDEFINED;
3190 		phy->local_rx = e1000_1000t_rx_status_undefined;
3191 		phy->remote_rx = e1000_1000t_rx_status_undefined;
3192 	}
3193 
3194 	return 0;
3195 }
3196 
3197 /**
3198  *  e1000_get_cable_length_82577 - Determine cable length for 82577 PHY
3199  *  @hw: pointer to the HW structure
3200  *
3201  * Reads the diagnostic status register and verifies result is valid before
3202  * placing it in the phy_cable_length field.
3203  **/
3204 s32 e1000_get_cable_length_82577(struct e1000_hw *hw)
3205 {
3206 	struct e1000_phy_info *phy = &hw->phy;
3207 	s32 ret_val;
3208 	u16 phy_data, length;
3209 
3210 	ret_val = e1e_rphy(hw, I82577_PHY_DIAG_STATUS, &phy_data);
3211 	if (ret_val)
3212 		return ret_val;
3213 
3214 	length = ((phy_data & I82577_DSTATUS_CABLE_LENGTH) >>
3215 		  I82577_DSTATUS_CABLE_LENGTH_SHIFT);
3216 
3217 	if (length == E1000_CABLE_LENGTH_UNDEFINED)
3218 		return -E1000_ERR_PHY;
3219 
3220 	phy->cable_length = length;
3221 
3222 	return 0;
3223 }
3224