summaryrefslogtreecommitdiff
path: root/drivers/net/ethernet/atheros/atl1e/atl1e_hw.c
blob: 923063d2e5bbcd90a04fffe0642e8ca5bab32da6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
/*
 * Copyright(c) 2007 Atheros Corporation. All rights reserved.
 *
 * Derived from Intel e1000 driver
 * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 59
 * Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/mii.h>
#include <linux/crc32.h>

#include "atl1e.h"

/*
 * check_eeprom_exist
 * return 0 if eeprom exist
 */
int atl1e_check_eeprom_exist(struct atl1e_hw *hw)
{
	u32 value;

	value = AT_READ_REG(hw, REG_SPI_FLASH_CTRL);
	if (value & SPI_FLASH_CTRL_EN_VPD) {
		value &= ~SPI_FLASH_CTRL_EN_VPD;
		AT_WRITE_REG(hw, REG_SPI_FLASH_CTRL, value);
	}
	value = AT_READ_REGW(hw, REG_PCIE_CAP_LIST);
	return ((value & 0xFF00) == 0x6C00) ? 0 : 1;
}

void atl1e_hw_set_mac_addr(struct atl1e_hw *hw)
{
	u32 value;
	/*
	 * 00-0B-6A-F6-00-DC
	 * 0:  6AF600DC 1: 000B
	 * low dword
	 */
	value = (((u32)hw->mac_addr[2]) << 24) |
		(((u32)hw->mac_addr[3]) << 16) |
		(((u32)hw->mac_addr[4]) << 8)  |
		(((u32)hw->mac_addr[5])) ;
	AT_WRITE_REG_ARRAY(hw, REG_MAC_STA_ADDR, 0, value);
	/* hight dword */
	value = (((u32)hw->mac_addr[0]) << 8) |
		(((u32)hw->mac_addr[1])) ;
	AT_WRITE_REG_ARRAY(hw, REG_MAC_STA_ADDR, 1, value);
}

/*
 * atl1e_get_permanent_address
 * return 0 if get valid mac address,
 */
static int atl1e_get_permanent_address(struct atl1e_hw *hw)
{
	u32 addr[2];
	u32 i;
	u32 twsi_ctrl_data;
	u8  eth_addr[ETH_ALEN];

	if (is_valid_ether_addr(hw->perm_mac_addr))
		return 0;

	/* init */
	addr[0] = addr[1] = 0;

	if (!atl1e_check_eeprom_exist(hw)) {
		/* eeprom exist */
		twsi_ctrl_data = AT_READ_REG(hw, REG_TWSI_CTRL);
		twsi_ctrl_data |= TWSI_CTRL_SW_LDSTART;
		AT_WRITE_REG(hw, REG_TWSI_CTRL, twsi_ctrl_data);
		for (i = 0; i < AT_TWSI_EEPROM_TIMEOUT; i++) {
			msleep(10);
			twsi_ctrl_data = AT_READ_REG(hw, REG_TWSI_CTRL);
			if ((twsi_ctrl_data & TWSI_CTRL_SW_LDSTART) == 0)
				break;
		}
		if (i >= AT_TWSI_EEPROM_TIMEOUT)
			return AT_ERR_TIMEOUT;
	}

	/* maybe MAC-address is from BIOS */
	addr[0] = AT_READ_REG(hw, REG_MAC_STA_ADDR);
	addr[1] = AT_READ_REG(hw, REG_MAC_STA_ADDR + 4);
	*(u32 *) &eth_addr[2] = swab32(addr[0]);
	*(u16 *) &eth_addr[0] = swab16(*(u16 *)&addr[1]);

	if (is_valid_ether_addr(eth_addr)) {
		memcpy(hw->perm_mac_addr, eth_addr, ETH_ALEN);
		return 0;
	}

	return AT_ERR_EEPROM;
}

bool atl1e_write_eeprom(struct atl1e_hw *hw, u32 offset, u32 value)
{
	return true;
}

bool atl1e_read_eeprom(struct atl1e_hw *hw, u32 offset, u32 *p_value)
{
	int i;
	u32 control;

	if (offset & 3)
		return false; /* address do not align */

	AT_WRITE_REG(hw, REG_VPD_DATA, 0);
	control = (offset & VPD_CAP_VPD_ADDR_MASK) << VPD_CAP_VPD_ADDR_SHIFT;
	AT_WRITE_REG(hw, REG_VPD_CAP, control);

	for (i = 0; i < 10; i++) {
		msleep(2);
		control = AT_READ_REG(hw, REG_VPD_CAP);
		if (control & VPD_CAP_VPD_FLAG)
			break;
	}
	if (control & VPD_CAP_VPD_FLAG) {
		*p_value = AT_READ_REG(hw, REG_VPD_DATA);
		return true;
	}
	return false; /* timeout */
}

void atl1e_force_ps(struct atl1e_hw *hw)
{
	AT_WRITE_REGW(hw, REG_GPHY_CTRL,
			GPHY_CTRL_PW_WOL_DIS | GPHY_CTRL_EXT_RESET);
}

/*
 * Reads the adapter's MAC address from the EEPROM
 *
 * hw - Struct containing variables accessed by shared code
 */
int atl1e_read_mac_addr(struct atl1e_hw *hw)
{
	int err = 0;

	err = atl1e_get_permanent_address(hw);
	if (err)
		return AT_ERR_EEPROM;
	memcpy(hw->mac_addr, hw->perm_mac_addr, sizeof(hw->perm_mac_addr));
	return 0;
}

/*
 * atl1e_hash_mc_addr
 *  purpose
 *      set hash value for a multicast address
 */
u32 atl1e_hash_mc_addr(struct atl1e_hw *hw, u8 *mc_addr)
{
	u32 crc32;
	u32 value = 0;
	int i;

	crc32 = ether_crc_le(6, mc_addr);
	for (i = 0; i < 32; i++)
		value |= (((crc32 >> i) & 1) << (31 - i));

	return value;
}

/*
 * Sets the bit in the multicast table corresponding to the hash value.
 * hw - Struct containing variables accessed by shared code
 * hash_value - Multicast address hash value
 */
void atl1e_hash_set(struct atl1e_hw *hw, u32 hash_value)
{
	u32 hash_bit, hash_reg;
	u32 mta;

	/*
	 * The HASH Table  is a register array of 2 32-bit registers.
	 * It is treated like an array of 64 bits.  We want to set
	 * bit BitArray[hash_value]. So we figure out what register
	 * the bit is in, read it, OR in the new bit, then write
	 * back the new value.  The register is determined by the
	 * upper 7 bits of the hash value and the bit within that
	 * register are determined by the lower 5 bits of the value.
	 */
	hash_reg = (hash_value >> 31) & 0x1;
	hash_bit = (hash_value >> 26) & 0x1F;

	mta = AT_READ_REG_ARRAY(hw, REG_RX_HASH_TABLE, hash_reg);

	mta |= (1 << hash_bit);

	AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, hash_reg, mta);
}
/*
 * Reads the value from a PHY register
 * hw - Struct containing variables accessed by shared code
 * reg_addr - address of the PHY register to read
 */
int atl1e_read_phy_reg(struct atl1e_hw *hw, u16 reg_addr, u16 *phy_data)
{
	u32 val;
	int i;

	val = ((u32)(reg_addr & MDIO_REG_ADDR_MASK)) << MDIO_REG_ADDR_SHIFT |
		MDIO_START | MDIO_SUP_PREAMBLE | MDIO_RW |
		MDIO_CLK_25_4 << MDIO_CLK_SEL_SHIFT;

	AT_WRITE_REG(hw, REG_MDIO_CTRL, val);

	wmb();

	for (i = 0; i < MDIO_WAIT_TIMES; i++) {
		udelay(2);
		val = AT_READ_REG(hw, REG_MDIO_CTRL);
		if (!(val & (MDIO_START | MDIO_BUSY)))
			break;
		wmb();
	}
	if (!(val & (MDIO_START | MDIO_BUSY))) {
		*phy_data = (u16)val;
		return 0;
	}

	return AT_ERR_PHY;
}

/*
 * Writes a value to a PHY register
 * hw - Struct containing variables accessed by shared code
 * reg_addr - address of the PHY register to write
 * data - data to write to the PHY
 */
int atl1e_write_phy_reg(struct atl1e_hw *hw, u32 reg_addr, u16 phy_data)
{
	int i;
	u32 val;

	val = ((u32)(phy_data & MDIO_DATA_MASK)) << MDIO_DATA_SHIFT |
	       (reg_addr&MDIO_REG_ADDR_MASK) << MDIO_REG_ADDR_SHIFT |
	       MDIO_SUP_PREAMBLE |
	       MDIO_START |
	       MDIO_CLK_25_4 << MDIO_CLK_SEL_SHIFT;

	AT_WRITE_REG(hw, REG_MDIO_CTRL, val);
	wmb();

	for (i = 0; i < MDIO_WAIT_TIMES; i++) {
		udelay(2);
		val = AT_READ_REG(hw, REG_MDIO_CTRL);
		if (!(val & (MDIO_START | MDIO_BUSY)))
			break;
		wmb();
	}

	if (!(val & (MDIO_START | MDIO_BUSY)))
		return 0;

	return AT_ERR_PHY;
}

/*
 * atl1e_init_pcie - init PCIE module
 */
static void atl1e_init_pcie(struct atl1e_hw *hw)
{
	u32 value;
	/* comment 2lines below to save more power when sususpend
	   value = LTSSM_TEST_MODE_DEF;
	   AT_WRITE_REG(hw, REG_LTSSM_TEST_MODE, value);
	 */

	/* pcie flow control mode change */
	value = AT_READ_REG(hw, 0x1008);
	value |= 0x8000;
	AT_WRITE_REG(hw, 0x1008, value);
}
/*
 * Configures PHY autoneg and flow control advertisement settings
 *
 * hw - Struct containing variables accessed by shared code
 */
static int atl1e_phy_setup_autoneg_adv(struct atl1e_hw *hw)
{
	s32 ret_val;
	u16 mii_autoneg_adv_reg;
	u16 mii_1000t_ctrl_reg;

	if (0 != hw->mii_autoneg_adv_reg)
		return 0;
	/* Read the MII Auto-Neg Advertisement Register (Address 4/9). */
	mii_autoneg_adv_reg = MII_AR_DEFAULT_CAP_MASK;
	mii_1000t_ctrl_reg  = MII_AT001_CR_1000T_DEFAULT_CAP_MASK;

	/*
	 * Need to parse autoneg_advertised  and set up
	 * the appropriate PHY registers.  First we will parse for
	 * autoneg_advertised software override.  Since we can advertise
	 * a plethora of combinations, we need to check each bit
	 * individually.
	 */

	/*
	 * First we clear all the 10/100 mb speed bits in the Auto-Neg
	 * Advertisement Register (Address 4) and the 1000 mb speed bits in
	 * the  1000Base-T control Register (Address 9).
	 */
	mii_autoneg_adv_reg &= ~ADVERTISE_ALL;
	mii_1000t_ctrl_reg  &= ~MII_AT001_CR_1000T_SPEED_MASK;

	/*
	 * Need to parse MediaType and setup the
	 * appropriate PHY registers.
	 */
	switch (hw->media_type) {
	case MEDIA_TYPE_AUTO_SENSOR:
		mii_autoneg_adv_reg |= ADVERTISE_ALL;
		hw->autoneg_advertised = ADVERTISE_ALL;
		if (hw->nic_type == athr_l1e) {
			mii_1000t_ctrl_reg |= ADVERTISE_1000FULL;
			hw->autoneg_advertised |= ADVERTISE_1000_FULL;
		}
		break;

	case MEDIA_TYPE_100M_FULL:
		mii_autoneg_adv_reg   |= ADVERTISE_100FULL;
		hw->autoneg_advertised = ADVERTISE_100_FULL;
		break;

	case MEDIA_TYPE_100M_HALF:
		mii_autoneg_adv_reg   |= ADVERTISE_100_HALF;
		hw->autoneg_advertised = ADVERTISE_100_HALF;
		break;

	case MEDIA_TYPE_10M_FULL:
		mii_autoneg_adv_reg   |= ADVERTISE_10_FULL;
		hw->autoneg_advertised = ADVERTISE_10_FULL;
		break;

	default:
		mii_autoneg_adv_reg   |= ADVERTISE_10_HALF;
		hw->autoneg_advertised = ADVERTISE_10_HALF;
		break;
	}

	/* flow control fixed to enable all */
	mii_autoneg_adv_reg |= (ADVERTISE_PAUSE_ASYM | ADVERTISE_PAUSE_CAP);

	hw->mii_autoneg_adv_reg = mii_autoneg_adv_reg;
	hw->mii_1000t_ctrl_reg  = mii_1000t_ctrl_reg;

	ret_val = atl1e_write_phy_reg(hw, MII_ADVERTISE, mii_autoneg_adv_reg);
	if (ret_val)
		return ret_val;

	if (hw->nic_type == athr_l1e || hw->nic_type == athr_l2e_revA) {
		ret_val = atl1e_write_phy_reg(hw, MII_CTRL1000,
					   mii_1000t_ctrl_reg);
		if (ret_val)
			return ret_val;
	}

	return 0;
}


/*
 * Resets the PHY and make all config validate
 *
 * hw - Struct containing variables accessed by shared code
 *
 * Sets bit 15 and 12 of the MII control regiser (for F001 bug)
 */
int atl1e_phy_commit(struct atl1e_hw *hw)
{
	struct atl1e_adapter *adapter = hw->adapter;
	int ret_val;
	u16 phy_data;

	phy_data = BMCR_RESET | BMCR_ANENABLE | BMCR_ANRESTART;

	ret_val = atl1e_write_phy_reg(hw, MII_BMCR, phy_data);
	if (ret_val) {
		u32 val;
		int i;
		/**************************************
		 * pcie serdes link may be down !
		 **************************************/
		for (i = 0; i < 25; i++) {
			msleep(1);
			val = AT_READ_REG(hw, REG_MDIO_CTRL);
			if (!(val & (MDIO_START | MDIO_BUSY)))
				break;
		}

		if (0 != (val & (MDIO_START | MDIO_BUSY))) {
			netdev_err(adapter->netdev,
				   "pcie linkdown at least for 25ms\n");
			return ret_val;
		}

		netdev_err(adapter->netdev, "pcie linkup after %d ms\n", i);
	}
	return 0;
}

int atl1e_phy_init(struct atl1e_hw *hw)
{
	struct atl1e_adapter *adapter = hw->adapter;
	s32 ret_val;
	u16 phy_val;

	if (hw->phy_configured) {
		if (hw->re_autoneg) {
			hw->re_autoneg = false;
			return atl1e_restart_autoneg(hw);
		}
		return 0;
	}

	/* RESET GPHY Core */
	AT_WRITE_REGW(hw, REG_GPHY_CTRL, GPHY_CTRL_DEFAULT);
	msleep(2);
	AT_WRITE_REGW(hw, REG_GPHY_CTRL, GPHY_CTRL_DEFAULT |
		      GPHY_CTRL_EXT_RESET);
	msleep(2);

	/* patches */
	/* p1. eable hibernation mode */
	ret_val = atl1e_write_phy_reg(hw, MII_DBG_ADDR, 0xB);
	if (ret_val)
		return ret_val;
	ret_val = atl1e_write_phy_reg(hw, MII_DBG_DATA, 0xBC00);
	if (ret_val)
		return ret_val;
	/* p2. set Class A/B for all modes */
	ret_val = atl1e_write_phy_reg(hw, MII_DBG_ADDR, 0);
	if (ret_val)
		return ret_val;
	phy_val = 0x02ef;
	/* remove Class AB */
	/* phy_val = hw->emi_ca ? 0x02ef : 0x02df; */
	ret_val = atl1e_write_phy_reg(hw, MII_DBG_DATA, phy_val);
	if (ret_val)
		return ret_val;
	/* p3. 10B ??? */
	ret_val = atl1e_write_phy_reg(hw, MII_DBG_ADDR, 0x12);
	if (ret_val)
		return ret_val;
	ret_val = atl1e_write_phy_reg(hw, MII_DBG_DATA, 0x4C04);
	if (ret_val)
		return ret_val;
	/* p4. 1000T power */
	ret_val = atl1e_write_phy_reg(hw, MII_DBG_ADDR, 0x4);
	if (ret_val)
		return ret_val;
	ret_val = atl1e_write_phy_reg(hw, MII_DBG_DATA, 0x8BBB);
	if (ret_val)
		return ret_val;

	ret_val = atl1e_write_phy_reg(hw, MII_DBG_ADDR, 0x5);
	if (ret_val)
		return ret_val;
	ret_val = atl1e_write_phy_reg(hw, MII_DBG_DATA, 0x2C46);
	if (ret_val)
		return ret_val;

	msleep(1);

	/*Enable PHY LinkChange Interrupt */
	ret_val = atl1e_write_phy_reg(hw, MII_INT_CTRL, 0xC00);
	if (ret_val) {
		netdev_err(adapter->netdev,
			   "Error enable PHY linkChange Interrupt\n");
		return ret_val;
	}
	/* setup AutoNeg parameters */
	ret_val = atl1e_phy_setup_autoneg_adv(hw);
	if (ret_val) {
		netdev_err(adapter->netdev,
			   "Error Setting up Auto-Negotiation\n");
		return ret_val;
	}
	/* SW.Reset & En-Auto-Neg to restart Auto-Neg*/
	netdev_dbg(adapter->netdev, "Restarting Auto-Negotiation\n");
	ret_val = atl1e_phy_commit(hw);
	if (ret_val) {
		netdev_err(adapter->netdev, "Error resetting the phy\n");
		return ret_val;
	}

	hw->phy_configured = true;

	return 0;
}

/*
 * Reset the transmit and receive units; mask and clear all interrupts.
 * hw - Struct containing variables accessed by shared code
 * return : 0  or  idle status (if error)
 */
int atl1e_reset_hw(struct atl1e_hw *hw)
{
	struct atl1e_adapter *adapter = hw->adapter;
	struct pci_dev *pdev = adapter->pdev;

	u32 idle_status_data = 0;
	u16 pci_cfg_cmd_word = 0;
	int timeout = 0;

	/* Workaround for PCI problem when BIOS sets MMRBC incorrectly. */
	pci_read_config_word(pdev, PCI_REG_COMMAND, &pci_cfg_cmd_word);
	if ((pci_cfg_cmd_word & (CMD_IO_SPACE |
				CMD_MEMORY_SPACE | CMD_BUS_MASTER))
			!= (CMD_IO_SPACE | CMD_MEMORY_SPACE | CMD_BUS_MASTER)) {
		pci_cfg_cmd_word |= (CMD_IO_SPACE |
				     CMD_MEMORY_SPACE | CMD_BUS_MASTER);
		pci_write_config_word(pdev, PCI_REG_COMMAND, pci_cfg_cmd_word);
	}

	/*
	 * Issue Soft Reset to the MAC.  This will reset the chip's
	 * transmit, receive, DMA.  It will not effect
	 * the current PCI configuration.  The global reset bit is self-
	 * clearing, and should clear within a microsecond.
	 */
	AT_WRITE_REG(hw, REG_MASTER_CTRL,
			MASTER_CTRL_LED_MODE | MASTER_CTRL_SOFT_RST);
	wmb();
	msleep(1);

	/* Wait at least 10ms for All module to be Idle */
	for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) {
		idle_status_data = AT_READ_REG(hw, REG_IDLE_STATUS);
		if (idle_status_data == 0)
			break;
		msleep(1);
		cpu_relax();
	}

	if (timeout >= AT_HW_MAX_IDLE_DELAY) {
		netdev_err(adapter->netdev,
			   "MAC state machine can't be idle since disabled for 10ms second\n");
		return AT_ERR_TIMEOUT;
	}

	return 0;
}


/*
 * Performs basic configuration of the adapter.
 *
 * hw - Struct containing variables accessed by shared code
 * Assumes that the controller has previously been reset and is in a
 * post-reset uninitialized state. Initializes multicast table,
 * and  Calls routines to setup link
 * Leaves the transmit and receive units disabled and uninitialized.
 */
int atl1e_init_hw(struct atl1e_hw *hw)
{
	s32 ret_val = 0;

	atl1e_init_pcie(hw);

	/* Zero out the Multicast HASH table */
	/* clear the old settings from the multicast hash table */
	AT_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
	AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);

	ret_val = atl1e_phy_init(hw);

	return ret_val;
}

/*
 * Detects the current speed and duplex settings of the hardware.
 *
 * hw - Struct containing variables accessed by shared code
 * speed - Speed of the connection
 * duplex - Duplex setting of the connection
 */
int atl1e_get_speed_and_duplex(struct atl1e_hw *hw, u16 *speed, u16 *duplex)
{
	int err;
	u16 phy_data;

	/* Read   PHY Specific Status Register (17) */
	err = atl1e_read_phy_reg(hw, MII_AT001_PSSR, &phy_data);
	if (err)
		return err;

	if (!(phy_data & MII_AT001_PSSR_SPD_DPLX_RESOLVED))
		return AT_ERR_PHY_RES;

	switch (phy_data & MII_AT001_PSSR_SPEED) {
	case MII_AT001_PSSR_1000MBS:
		*speed = SPEED_1000;
		break;
	case MII_AT001_PSSR_100MBS:
		*speed = SPEED_100;
		break;
	case MII_AT001_PSSR_10MBS:
		*speed = SPEED_10;
		break;
	default:
		return AT_ERR_PHY_SPEED;
		break;
	}

	if (phy_data & MII_AT001_PSSR_DPLX)
		*duplex = FULL_DUPLEX;
	else
		*duplex = HALF_DUPLEX;

	return 0;
}

int atl1e_restart_autoneg(struct atl1e_hw *hw)
{
	int err = 0;

	err = atl1e_write_phy_reg(hw, MII_ADVERTISE, hw->mii_autoneg_adv_reg);
	if (err)
		return err;

	if (hw->nic_type == athr_l1e || hw->nic_type == athr_l2e_revA) {
		err = atl1e_write_phy_reg(hw, MII_CTRL1000,
				       hw->mii_1000t_ctrl_reg);
		if (err)
			return err;
	}

	err = atl1e_write_phy_reg(hw, MII_BMCR,
			BMCR_RESET | BMCR_ANENABLE | BMCR_ANRESTART);
	return err;
}