1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Copyright(c) 2007 Atheros Corporation. All rights reserved.
4  *
5  * Derived from Intel e1000 driver
6  * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
7  */
8 #include <linux/pci.h>
9 #include <linux/delay.h>
10 #include <linux/mii.h>
11 #include <linux/crc32.h>
12 
13 #include "atl1c.h"
14 
15 /*
16  * check_eeprom_exist
17  * return 1 if eeprom exist
18  */
19 int atl1c_check_eeprom_exist(struct atl1c_hw *hw)
20 {
21 	u32 data;
22 
23 	AT_READ_REG(hw, REG_TWSI_DEBUG, &data);
24 	if (data & TWSI_DEBUG_DEV_EXIST)
25 		return 1;
26 
27 	AT_READ_REG(hw, REG_MASTER_CTRL, &data);
28 	if (data & MASTER_CTRL_OTP_SEL)
29 		return 1;
30 	return 0;
31 }
32 
33 void atl1c_hw_set_mac_addr(struct atl1c_hw *hw, u8 *mac_addr)
34 {
35 	u32 value;
36 	/*
37 	 * 00-0B-6A-F6-00-DC
38 	 * 0:  6AF600DC 1: 000B
39 	 * low dword
40 	 */
41 	value = mac_addr[2] << 24 |
42 		mac_addr[3] << 16 |
43 		mac_addr[4] << 8  |
44 		mac_addr[5];
45 	AT_WRITE_REG_ARRAY(hw, REG_MAC_STA_ADDR, 0, value);
46 	/* hight dword */
47 	value = mac_addr[0] << 8 |
48 		mac_addr[1];
49 	AT_WRITE_REG_ARRAY(hw, REG_MAC_STA_ADDR, 1, value);
50 }
51 
52 /* read mac address from hardware register */
53 static bool atl1c_read_current_addr(struct atl1c_hw *hw, u8 *eth_addr)
54 {
55 	u32 addr[2];
56 
57 	AT_READ_REG(hw, REG_MAC_STA_ADDR, &addr[0]);
58 	AT_READ_REG(hw, REG_MAC_STA_ADDR + 4, &addr[1]);
59 
60 	*(u32 *) &eth_addr[2] = htonl(addr[0]);
61 	*(u16 *) &eth_addr[0] = htons((u16)addr[1]);
62 
63 	return is_valid_ether_addr(eth_addr);
64 }
65 
66 /*
67  * atl1c_get_permanent_address
68  * return 0 if get valid mac address,
69  */
70 static int atl1c_get_permanent_address(struct atl1c_hw *hw)
71 {
72 	u32 i;
73 	u32 otp_ctrl_data;
74 	u32 twsi_ctrl_data;
75 	u16 phy_data;
76 	bool raise_vol = false;
77 
78 	/* MAC-address from BIOS is the 1st priority */
79 	if (atl1c_read_current_addr(hw, hw->perm_mac_addr))
80 		return 0;
81 
82 	/* init */
83 	AT_READ_REG(hw, REG_OTP_CTRL, &otp_ctrl_data);
84 	if (atl1c_check_eeprom_exist(hw)) {
85 		if (hw->nic_type == athr_l1c || hw->nic_type == athr_l2c) {
86 			/* Enable OTP CLK */
87 			if (!(otp_ctrl_data & OTP_CTRL_CLK_EN)) {
88 				otp_ctrl_data |= OTP_CTRL_CLK_EN;
89 				AT_WRITE_REG(hw, REG_OTP_CTRL, otp_ctrl_data);
90 				AT_WRITE_FLUSH(hw);
91 				msleep(1);
92 			}
93 		}
94 		/* raise voltage temporally for l2cb */
95 		if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2) {
96 			atl1c_read_phy_dbg(hw, MIIDBG_ANACTRL, &phy_data);
97 			phy_data &= ~ANACTRL_HB_EN;
98 			atl1c_write_phy_dbg(hw, MIIDBG_ANACTRL, phy_data);
99 			atl1c_read_phy_dbg(hw, MIIDBG_VOLT_CTRL, &phy_data);
100 			phy_data |= VOLT_CTRL_SWLOWEST;
101 			atl1c_write_phy_dbg(hw, MIIDBG_VOLT_CTRL, phy_data);
102 			udelay(20);
103 			raise_vol = true;
104 		}
105 
106 		AT_READ_REG(hw, REG_TWSI_CTRL, &twsi_ctrl_data);
107 		twsi_ctrl_data |= TWSI_CTRL_SW_LDSTART;
108 		AT_WRITE_REG(hw, REG_TWSI_CTRL, twsi_ctrl_data);
109 		for (i = 0; i < AT_TWSI_EEPROM_TIMEOUT; i++) {
110 			msleep(10);
111 			AT_READ_REG(hw, REG_TWSI_CTRL, &twsi_ctrl_data);
112 			if ((twsi_ctrl_data & TWSI_CTRL_SW_LDSTART) == 0)
113 				break;
114 		}
115 		if (i >= AT_TWSI_EEPROM_TIMEOUT)
116 			return -1;
117 	}
118 	/* Disable OTP_CLK */
119 	if ((hw->nic_type == athr_l1c || hw->nic_type == athr_l2c)) {
120 		otp_ctrl_data &= ~OTP_CTRL_CLK_EN;
121 		AT_WRITE_REG(hw, REG_OTP_CTRL, otp_ctrl_data);
122 		msleep(1);
123 	}
124 	if (raise_vol) {
125 		atl1c_read_phy_dbg(hw, MIIDBG_ANACTRL, &phy_data);
126 		phy_data |= ANACTRL_HB_EN;
127 		atl1c_write_phy_dbg(hw, MIIDBG_ANACTRL, phy_data);
128 		atl1c_read_phy_dbg(hw, MIIDBG_VOLT_CTRL, &phy_data);
129 		phy_data &= ~VOLT_CTRL_SWLOWEST;
130 		atl1c_write_phy_dbg(hw, MIIDBG_VOLT_CTRL, phy_data);
131 		udelay(20);
132 	}
133 
134 	if (atl1c_read_current_addr(hw, hw->perm_mac_addr))
135 		return 0;
136 
137 	return -1;
138 }
139 
140 bool atl1c_read_eeprom(struct atl1c_hw *hw, u32 offset, u32 *p_value)
141 {
142 	int i;
143 	bool ret = false;
144 	u32 otp_ctrl_data;
145 	u32 control;
146 	u32 data;
147 
148 	if (offset & 3)
149 		return ret; /* address do not align */
150 
151 	AT_READ_REG(hw, REG_OTP_CTRL, &otp_ctrl_data);
152 	if (!(otp_ctrl_data & OTP_CTRL_CLK_EN))
153 		AT_WRITE_REG(hw, REG_OTP_CTRL,
154 				(otp_ctrl_data | OTP_CTRL_CLK_EN));
155 
156 	AT_WRITE_REG(hw, REG_EEPROM_DATA_LO, 0);
157 	control = (offset & EEPROM_CTRL_ADDR_MASK) << EEPROM_CTRL_ADDR_SHIFT;
158 	AT_WRITE_REG(hw, REG_EEPROM_CTRL, control);
159 
160 	for (i = 0; i < 10; i++) {
161 		udelay(100);
162 		AT_READ_REG(hw, REG_EEPROM_CTRL, &control);
163 		if (control & EEPROM_CTRL_RW)
164 			break;
165 	}
166 	if (control & EEPROM_CTRL_RW) {
167 		AT_READ_REG(hw, REG_EEPROM_CTRL, &data);
168 		AT_READ_REG(hw, REG_EEPROM_DATA_LO, p_value);
169 		data = data & 0xFFFF;
170 		*p_value = swab32((data << 16) | (*p_value >> 16));
171 		ret = true;
172 	}
173 	if (!(otp_ctrl_data & OTP_CTRL_CLK_EN))
174 		AT_WRITE_REG(hw, REG_OTP_CTRL, otp_ctrl_data);
175 
176 	return ret;
177 }
178 /*
179  * Reads the adapter's MAC address from the EEPROM
180  *
181  * hw - Struct containing variables accessed by shared code
182  */
183 int atl1c_read_mac_addr(struct atl1c_hw *hw)
184 {
185 	int err = 0;
186 
187 	err = atl1c_get_permanent_address(hw);
188 	if (err)
189 		eth_random_addr(hw->perm_mac_addr);
190 
191 	memcpy(hw->mac_addr, hw->perm_mac_addr, sizeof(hw->perm_mac_addr));
192 	return err;
193 }
194 
195 /*
196  * atl1c_hash_mc_addr
197  *  purpose
198  *      set hash value for a multicast address
199  *      hash calcu processing :
200  *          1. calcu 32bit CRC for multicast address
201  *          2. reverse crc with MSB to LSB
202  */
203 u32 atl1c_hash_mc_addr(struct atl1c_hw *hw, u8 *mc_addr)
204 {
205 	u32 crc32;
206 	u32 value = 0;
207 	int i;
208 
209 	crc32 = ether_crc_le(6, mc_addr);
210 	for (i = 0; i < 32; i++)
211 		value |= (((crc32 >> i) & 1) << (31 - i));
212 
213 	return value;
214 }
215 
216 /*
217  * Sets the bit in the multicast table corresponding to the hash value.
218  * hw - Struct containing variables accessed by shared code
219  * hash_value - Multicast address hash value
220  */
221 void atl1c_hash_set(struct atl1c_hw *hw, u32 hash_value)
222 {
223 	u32 hash_bit, hash_reg;
224 	u32 mta;
225 
226 	/*
227 	 * The HASH Table  is a register array of 2 32-bit registers.
228 	 * It is treated like an array of 64 bits.  We want to set
229 	 * bit BitArray[hash_value]. So we figure out what register
230 	 * the bit is in, read it, OR in the new bit, then write
231 	 * back the new value.  The register is determined by the
232 	 * upper bit of the hash value and the bit within that
233 	 * register are determined by the lower 5 bits of the value.
234 	 */
235 	hash_reg = (hash_value >> 31) & 0x1;
236 	hash_bit = (hash_value >> 26) & 0x1F;
237 
238 	mta = AT_READ_REG_ARRAY(hw, REG_RX_HASH_TABLE, hash_reg);
239 
240 	mta |= (1 << hash_bit);
241 
242 	AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, hash_reg, mta);
243 }
244 
245 /*
246  * wait mdio module be idle
247  * return true: idle
248  *        false: still busy
249  */
250 bool atl1c_wait_mdio_idle(struct atl1c_hw *hw)
251 {
252 	u32 val;
253 	int i;
254 
255 	for (i = 0; i < MDIO_MAX_AC_TO; i++) {
256 		AT_READ_REG(hw, REG_MDIO_CTRL, &val);
257 		if (!(val & (MDIO_CTRL_BUSY | MDIO_CTRL_START)))
258 			break;
259 		udelay(10);
260 	}
261 
262 	return i != MDIO_MAX_AC_TO;
263 }
264 
265 void atl1c_stop_phy_polling(struct atl1c_hw *hw)
266 {
267 	if (!(hw->ctrl_flags & ATL1C_FPGA_VERSION))
268 		return;
269 
270 	AT_WRITE_REG(hw, REG_MDIO_CTRL, 0);
271 	atl1c_wait_mdio_idle(hw);
272 }
273 
274 void atl1c_start_phy_polling(struct atl1c_hw *hw, u16 clk_sel)
275 {
276 	u32 val;
277 
278 	if (!(hw->ctrl_flags & ATL1C_FPGA_VERSION))
279 		return;
280 
281 	val = MDIO_CTRL_SPRES_PRMBL |
282 		FIELDX(MDIO_CTRL_CLK_SEL, clk_sel) |
283 		FIELDX(MDIO_CTRL_REG, 1) |
284 		MDIO_CTRL_START |
285 		MDIO_CTRL_OP_READ;
286 	AT_WRITE_REG(hw, REG_MDIO_CTRL, val);
287 	atl1c_wait_mdio_idle(hw);
288 	val |= MDIO_CTRL_AP_EN;
289 	val &= ~MDIO_CTRL_START;
290 	AT_WRITE_REG(hw, REG_MDIO_CTRL, val);
291 	udelay(30);
292 }
293 
294 
295 /*
296  * atl1c_read_phy_core
297  * core function to read register in PHY via MDIO control register.
298  * ext: extension register (see IEEE 802.3)
299  * dev: device address (see IEEE 802.3 DEVAD, PRTAD is fixed to 0)
300  * reg: reg to read
301  */
302 int atl1c_read_phy_core(struct atl1c_hw *hw, bool ext, u8 dev,
303 			u16 reg, u16 *phy_data)
304 {
305 	u32 val;
306 	u16 clk_sel = MDIO_CTRL_CLK_25_4;
307 
308 	atl1c_stop_phy_polling(hw);
309 
310 	*phy_data = 0;
311 
312 	/* only l2c_b2 & l1d_2 could use slow clock */
313 	if ((hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) &&
314 		hw->hibernate)
315 		clk_sel = MDIO_CTRL_CLK_25_128;
316 	if (ext) {
317 		val = FIELDX(MDIO_EXTN_DEVAD, dev) | FIELDX(MDIO_EXTN_REG, reg);
318 		AT_WRITE_REG(hw, REG_MDIO_EXTN, val);
319 		val = MDIO_CTRL_SPRES_PRMBL |
320 			FIELDX(MDIO_CTRL_CLK_SEL, clk_sel) |
321 			MDIO_CTRL_START |
322 			MDIO_CTRL_MODE_EXT |
323 			MDIO_CTRL_OP_READ;
324 	} else {
325 		val = MDIO_CTRL_SPRES_PRMBL |
326 			FIELDX(MDIO_CTRL_CLK_SEL, clk_sel) |
327 			FIELDX(MDIO_CTRL_REG, reg) |
328 			MDIO_CTRL_START |
329 			MDIO_CTRL_OP_READ;
330 	}
331 	AT_WRITE_REG(hw, REG_MDIO_CTRL, val);
332 
333 	if (!atl1c_wait_mdio_idle(hw))
334 		return -1;
335 
336 	AT_READ_REG(hw, REG_MDIO_CTRL, &val);
337 	*phy_data = (u16)FIELD_GETX(val, MDIO_CTRL_DATA);
338 
339 	atl1c_start_phy_polling(hw, clk_sel);
340 
341 	return 0;
342 }
343 
344 /*
345  * atl1c_write_phy_core
346  * core function to write to register in PHY via MDIO control register.
347  * ext: extension register (see IEEE 802.3)
348  * dev: device address (see IEEE 802.3 DEVAD, PRTAD is fixed to 0)
349  * reg: reg to write
350  */
351 int atl1c_write_phy_core(struct atl1c_hw *hw, bool ext, u8 dev,
352 			u16 reg, u16 phy_data)
353 {
354 	u32 val;
355 	u16 clk_sel = MDIO_CTRL_CLK_25_4;
356 
357 	atl1c_stop_phy_polling(hw);
358 
359 
360 	/* only l2c_b2 & l1d_2 could use slow clock */
361 	if ((hw->nic_type == athr_l2c_b2 || hw->nic_type == athr_l1d_2) &&
362 		hw->hibernate)
363 		clk_sel = MDIO_CTRL_CLK_25_128;
364 
365 	if (ext) {
366 		val = FIELDX(MDIO_EXTN_DEVAD, dev) | FIELDX(MDIO_EXTN_REG, reg);
367 		AT_WRITE_REG(hw, REG_MDIO_EXTN, val);
368 		val = MDIO_CTRL_SPRES_PRMBL |
369 			FIELDX(MDIO_CTRL_CLK_SEL, clk_sel) |
370 			FIELDX(MDIO_CTRL_DATA, phy_data) |
371 			MDIO_CTRL_START |
372 			MDIO_CTRL_MODE_EXT;
373 	} else {
374 		val = MDIO_CTRL_SPRES_PRMBL |
375 			FIELDX(MDIO_CTRL_CLK_SEL, clk_sel) |
376 			FIELDX(MDIO_CTRL_DATA, phy_data) |
377 			FIELDX(MDIO_CTRL_REG, reg) |
378 			MDIO_CTRL_START;
379 	}
380 	AT_WRITE_REG(hw, REG_MDIO_CTRL, val);
381 
382 	if (!atl1c_wait_mdio_idle(hw))
383 		return -1;
384 
385 	atl1c_start_phy_polling(hw, clk_sel);
386 
387 	return 0;
388 }
389 
390 /*
391  * Reads the value from a PHY register
392  * hw - Struct containing variables accessed by shared code
393  * reg_addr - address of the PHY register to read
394  */
395 int atl1c_read_phy_reg(struct atl1c_hw *hw, u16 reg_addr, u16 *phy_data)
396 {
397 	return atl1c_read_phy_core(hw, false, 0, reg_addr, phy_data);
398 }
399 
400 /*
401  * Writes a value to a PHY register
402  * hw - Struct containing variables accessed by shared code
403  * reg_addr - address of the PHY register to write
404  * data - data to write to the PHY
405  */
406 int atl1c_write_phy_reg(struct atl1c_hw *hw, u32 reg_addr, u16 phy_data)
407 {
408 	return atl1c_write_phy_core(hw, false, 0, reg_addr, phy_data);
409 }
410 
411 /* read from PHY extension register */
412 int atl1c_read_phy_ext(struct atl1c_hw *hw, u8 dev_addr,
413 			u16 reg_addr, u16 *phy_data)
414 {
415 	return atl1c_read_phy_core(hw, true, dev_addr, reg_addr, phy_data);
416 }
417 
418 /* write to PHY extension register */
419 int atl1c_write_phy_ext(struct atl1c_hw *hw, u8 dev_addr,
420 			u16 reg_addr, u16 phy_data)
421 {
422 	return atl1c_write_phy_core(hw, true, dev_addr, reg_addr, phy_data);
423 }
424 
425 int atl1c_read_phy_dbg(struct atl1c_hw *hw, u16 reg_addr, u16 *phy_data)
426 {
427 	int err;
428 
429 	err = atl1c_write_phy_reg(hw, MII_DBG_ADDR, reg_addr);
430 	if (unlikely(err))
431 		return err;
432 	else
433 		err = atl1c_read_phy_reg(hw, MII_DBG_DATA, phy_data);
434 
435 	return err;
436 }
437 
438 int atl1c_write_phy_dbg(struct atl1c_hw *hw, u16 reg_addr, u16 phy_data)
439 {
440 	int err;
441 
442 	err = atl1c_write_phy_reg(hw, MII_DBG_ADDR, reg_addr);
443 	if (unlikely(err))
444 		return err;
445 	else
446 		err = atl1c_write_phy_reg(hw, MII_DBG_DATA, phy_data);
447 
448 	return err;
449 }
450 
451 /*
452  * Configures PHY autoneg and flow control advertisement settings
453  *
454  * hw - Struct containing variables accessed by shared code
455  */
456 static int atl1c_phy_setup_adv(struct atl1c_hw *hw)
457 {
458 	u16 mii_adv_data = ADVERTISE_DEFAULT_CAP & ~ADVERTISE_ALL;
459 	u16 mii_giga_ctrl_data = GIGA_CR_1000T_DEFAULT_CAP &
460 				~GIGA_CR_1000T_SPEED_MASK;
461 
462 	if (hw->autoneg_advertised & ADVERTISED_10baseT_Half)
463 		mii_adv_data |= ADVERTISE_10HALF;
464 	if (hw->autoneg_advertised & ADVERTISED_10baseT_Full)
465 		mii_adv_data |= ADVERTISE_10FULL;
466 	if (hw->autoneg_advertised & ADVERTISED_100baseT_Half)
467 		mii_adv_data |= ADVERTISE_100HALF;
468 	if (hw->autoneg_advertised & ADVERTISED_100baseT_Full)
469 		mii_adv_data |= ADVERTISE_100FULL;
470 
471 	if (hw->autoneg_advertised & ADVERTISED_Autoneg)
472 		mii_adv_data |= ADVERTISE_10HALF  | ADVERTISE_10FULL |
473 				ADVERTISE_100HALF | ADVERTISE_100FULL;
474 
475 	if (hw->link_cap_flags & ATL1C_LINK_CAP_1000M) {
476 		if (hw->autoneg_advertised & ADVERTISED_1000baseT_Half)
477 			mii_giga_ctrl_data |= ADVERTISE_1000HALF;
478 		if (hw->autoneg_advertised & ADVERTISED_1000baseT_Full)
479 			mii_giga_ctrl_data |= ADVERTISE_1000FULL;
480 		if (hw->autoneg_advertised & ADVERTISED_Autoneg)
481 			mii_giga_ctrl_data |= ADVERTISE_1000HALF |
482 					ADVERTISE_1000FULL;
483 	}
484 
485 	if (atl1c_write_phy_reg(hw, MII_ADVERTISE, mii_adv_data) != 0 ||
486 	    atl1c_write_phy_reg(hw, MII_CTRL1000, mii_giga_ctrl_data) != 0)
487 		return -1;
488 	return 0;
489 }
490 
491 void atl1c_phy_disable(struct atl1c_hw *hw)
492 {
493 	atl1c_power_saving(hw, 0);
494 }
495 
496 
497 int atl1c_phy_reset(struct atl1c_hw *hw)
498 {
499 	struct atl1c_adapter *adapter = hw->adapter;
500 	struct pci_dev *pdev = adapter->pdev;
501 	u16 phy_data;
502 	u32 phy_ctrl_data, lpi_ctrl;
503 	int err;
504 
505 	/* reset PHY core */
506 	AT_READ_REG(hw, REG_GPHY_CTRL, &phy_ctrl_data);
507 	phy_ctrl_data &= ~(GPHY_CTRL_EXT_RESET | GPHY_CTRL_PHY_IDDQ |
508 		GPHY_CTRL_GATE_25M_EN | GPHY_CTRL_PWDOWN_HW | GPHY_CTRL_CLS);
509 	phy_ctrl_data |= GPHY_CTRL_SEL_ANA_RST;
510 	if (!(hw->ctrl_flags & ATL1C_HIB_DISABLE))
511 		phy_ctrl_data |= (GPHY_CTRL_HIB_EN | GPHY_CTRL_HIB_PULSE);
512 	else
513 		phy_ctrl_data &= ~(GPHY_CTRL_HIB_EN | GPHY_CTRL_HIB_PULSE);
514 	AT_WRITE_REG(hw, REG_GPHY_CTRL, phy_ctrl_data);
515 	AT_WRITE_FLUSH(hw);
516 	udelay(10);
517 	AT_WRITE_REG(hw, REG_GPHY_CTRL, phy_ctrl_data | GPHY_CTRL_EXT_RESET);
518 	AT_WRITE_FLUSH(hw);
519 	udelay(10 * GPHY_CTRL_EXT_RST_TO);	/* delay 800us */
520 
521 	/* switch clock */
522 	if (hw->nic_type == athr_l2c_b) {
523 		atl1c_read_phy_dbg(hw, MIIDBG_CFGLPSPD, &phy_data);
524 		atl1c_write_phy_dbg(hw, MIIDBG_CFGLPSPD,
525 			phy_data & ~CFGLPSPD_RSTCNT_CLK125SW);
526 	}
527 
528 	/* tx-half amplitude issue fix */
529 	if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2) {
530 		atl1c_read_phy_dbg(hw, MIIDBG_CABLE1TH_DET, &phy_data);
531 		phy_data |= CABLE1TH_DET_EN;
532 		atl1c_write_phy_dbg(hw, MIIDBG_CABLE1TH_DET, phy_data);
533 	}
534 
535 	/* clear bit3 of dbgport 3B to lower voltage */
536 	if (!(hw->ctrl_flags & ATL1C_HIB_DISABLE)) {
537 		if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2) {
538 			atl1c_read_phy_dbg(hw, MIIDBG_VOLT_CTRL, &phy_data);
539 			phy_data &= ~VOLT_CTRL_SWLOWEST;
540 			atl1c_write_phy_dbg(hw, MIIDBG_VOLT_CTRL, phy_data);
541 		}
542 		/* power saving config */
543 		phy_data =
544 			hw->nic_type == athr_l1d || hw->nic_type == athr_l1d_2 ?
545 			L1D_LEGCYPS_DEF : L1C_LEGCYPS_DEF;
546 		atl1c_write_phy_dbg(hw, MIIDBG_LEGCYPS, phy_data);
547 		/* hib */
548 		atl1c_write_phy_dbg(hw, MIIDBG_SYSMODCTRL,
549 			SYSMODCTRL_IECHOADJ_DEF);
550 	} else {
551 		/* disable pws */
552 		atl1c_read_phy_dbg(hw, MIIDBG_LEGCYPS, &phy_data);
553 		atl1c_write_phy_dbg(hw, MIIDBG_LEGCYPS,
554 			phy_data & ~LEGCYPS_EN);
555 		/* disable hibernate */
556 		atl1c_read_phy_dbg(hw, MIIDBG_HIBNEG, &phy_data);
557 		atl1c_write_phy_dbg(hw, MIIDBG_HIBNEG,
558 			phy_data & HIBNEG_PSHIB_EN);
559 	}
560 	/* disable AZ(EEE) by default */
561 	if (hw->nic_type == athr_l1d || hw->nic_type == athr_l1d_2 ||
562 	    hw->nic_type == athr_l2c_b2) {
563 		AT_READ_REG(hw, REG_LPI_CTRL, &lpi_ctrl);
564 		AT_WRITE_REG(hw, REG_LPI_CTRL, lpi_ctrl & ~LPI_CTRL_EN);
565 		atl1c_write_phy_ext(hw, MIIEXT_ANEG, MIIEXT_LOCAL_EEEADV, 0);
566 		atl1c_write_phy_ext(hw, MIIEXT_PCS, MIIEXT_CLDCTRL3,
567 			L2CB_CLDCTRL3);
568 	}
569 
570 	/* other debug port to set */
571 	atl1c_write_phy_dbg(hw, MIIDBG_ANACTRL, ANACTRL_DEF);
572 	atl1c_write_phy_dbg(hw, MIIDBG_SRDSYSMOD, SRDSYSMOD_DEF);
573 	atl1c_write_phy_dbg(hw, MIIDBG_TST10BTCFG, TST10BTCFG_DEF);
574 	/* UNH-IOL test issue, set bit7 */
575 	atl1c_write_phy_dbg(hw, MIIDBG_TST100BTCFG,
576 		TST100BTCFG_DEF | TST100BTCFG_LITCH_EN);
577 
578 	/* set phy interrupt mask */
579 	phy_data = IER_LINK_UP | IER_LINK_DOWN;
580 	err = atl1c_write_phy_reg(hw, MII_IER, phy_data);
581 	if (err) {
582 		if (netif_msg_hw(adapter))
583 			dev_err(&pdev->dev,
584 				"Error enable PHY linkChange Interrupt\n");
585 		return err;
586 	}
587 	return 0;
588 }
589 
590 int atl1c_phy_init(struct atl1c_hw *hw)
591 {
592 	struct atl1c_adapter *adapter = hw->adapter;
593 	struct pci_dev *pdev = adapter->pdev;
594 	int ret_val;
595 	u16 mii_bmcr_data = BMCR_RESET;
596 
597 	if (hw->nic_type == athr_mt) {
598 		hw->phy_configured = true;
599 		return 0;
600 	}
601 
602 	if ((atl1c_read_phy_reg(hw, MII_PHYSID1, &hw->phy_id1) != 0) ||
603 		(atl1c_read_phy_reg(hw, MII_PHYSID2, &hw->phy_id2) != 0)) {
604 		dev_err(&pdev->dev, "Error get phy ID\n");
605 		return -1;
606 	}
607 	switch (hw->media_type) {
608 	case MEDIA_TYPE_AUTO_SENSOR:
609 		ret_val = atl1c_phy_setup_adv(hw);
610 		if (ret_val) {
611 			if (netif_msg_link(adapter))
612 				dev_err(&pdev->dev,
613 					"Error Setting up Auto-Negotiation\n");
614 			return ret_val;
615 		}
616 		mii_bmcr_data |= BMCR_ANENABLE | BMCR_ANRESTART;
617 		break;
618 	case MEDIA_TYPE_100M_FULL:
619 		mii_bmcr_data |= BMCR_SPEED100 | BMCR_FULLDPLX;
620 		break;
621 	case MEDIA_TYPE_100M_HALF:
622 		mii_bmcr_data |= BMCR_SPEED100;
623 		break;
624 	case MEDIA_TYPE_10M_FULL:
625 		mii_bmcr_data |= BMCR_FULLDPLX;
626 		break;
627 	case MEDIA_TYPE_10M_HALF:
628 		break;
629 	default:
630 		if (netif_msg_link(adapter))
631 			dev_err(&pdev->dev, "Wrong Media type %d\n",
632 				hw->media_type);
633 		return -1;
634 	}
635 
636 	ret_val = atl1c_write_phy_reg(hw, MII_BMCR, mii_bmcr_data);
637 	if (ret_val)
638 		return ret_val;
639 	hw->phy_configured = true;
640 
641 	return 0;
642 }
643 
644 bool atl1c_get_link_status(struct atl1c_hw *hw)
645 {
646 	u16 phy_data;
647 
648 	if (hw->nic_type == athr_mt) {
649 		u32 spd;
650 
651 		AT_READ_REG(hw, REG_MT_SPEED, &spd);
652 		return !!spd;
653 	}
654 
655 	/* MII_BMSR must be read twice */
656 	atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
657 	atl1c_read_phy_reg(hw, MII_BMSR, &phy_data);
658 	return !!(phy_data & BMSR_LSTATUS);
659 }
660 
661 /*
662  * Detects the current speed and duplex settings of the hardware.
663  *
664  * hw - Struct containing variables accessed by shared code
665  * speed - Speed of the connection
666  * duplex - Duplex setting of the connection
667  */
668 int atl1c_get_speed_and_duplex(struct atl1c_hw *hw, u16 *speed, u16 *duplex)
669 {
670 	int err;
671 	u16 phy_data;
672 
673 	if (hw->nic_type == athr_mt) {
674 		u32 spd;
675 
676 		AT_READ_REG(hw, REG_MT_SPEED, &spd);
677 		*speed = spd;
678 		*duplex = FULL_DUPLEX;
679 		return 0;
680 	}
681 
682 	/* Read   PHY Specific Status Register (17) */
683 	err = atl1c_read_phy_reg(hw, MII_GIGA_PSSR, &phy_data);
684 	if (err)
685 		return err;
686 
687 	if (!(phy_data & GIGA_PSSR_SPD_DPLX_RESOLVED))
688 		return -1;
689 
690 	switch (phy_data & GIGA_PSSR_SPEED) {
691 	case GIGA_PSSR_1000MBS:
692 		*speed = SPEED_1000;
693 		break;
694 	case GIGA_PSSR_100MBS:
695 		*speed = SPEED_100;
696 		break;
697 	case  GIGA_PSSR_10MBS:
698 		*speed = SPEED_10;
699 		break;
700 	default:
701 		return -1;
702 	}
703 
704 	if (phy_data & GIGA_PSSR_DPLX)
705 		*duplex = FULL_DUPLEX;
706 	else
707 		*duplex = HALF_DUPLEX;
708 
709 	return 0;
710 }
711 
712 /* select one link mode to get lower power consumption */
713 int atl1c_phy_to_ps_link(struct atl1c_hw *hw)
714 {
715 	struct atl1c_adapter *adapter = hw->adapter;
716 	struct pci_dev *pdev = adapter->pdev;
717 	int ret = 0;
718 	u16 autoneg_advertised = ADVERTISED_10baseT_Half;
719 	u16 save_autoneg_advertised;
720 	u16 mii_lpa_data;
721 	u16 speed = SPEED_0;
722 	u16 duplex = FULL_DUPLEX;
723 	int i;
724 
725 	if (atl1c_get_link_status(hw)) {
726 		atl1c_read_phy_reg(hw, MII_LPA, &mii_lpa_data);
727 		if (mii_lpa_data & LPA_10FULL)
728 			autoneg_advertised = ADVERTISED_10baseT_Full;
729 		else if (mii_lpa_data & LPA_10HALF)
730 			autoneg_advertised = ADVERTISED_10baseT_Half;
731 		else if (mii_lpa_data & LPA_100HALF)
732 			autoneg_advertised = ADVERTISED_100baseT_Half;
733 		else if (mii_lpa_data & LPA_100FULL)
734 			autoneg_advertised = ADVERTISED_100baseT_Full;
735 
736 		save_autoneg_advertised = hw->autoneg_advertised;
737 		hw->phy_configured = false;
738 		hw->autoneg_advertised = autoneg_advertised;
739 		if (atl1c_restart_autoneg(hw) != 0) {
740 			dev_dbg(&pdev->dev, "phy autoneg failed\n");
741 			ret = -1;
742 		}
743 		hw->autoneg_advertised = save_autoneg_advertised;
744 
745 		if (mii_lpa_data) {
746 			for (i = 0; i < AT_SUSPEND_LINK_TIMEOUT; i++) {
747 				mdelay(100);
748 				if (atl1c_get_link_status(hw)) {
749 					if (atl1c_get_speed_and_duplex(hw, &speed,
750 									&duplex) != 0)
751 						dev_dbg(&pdev->dev,
752 							"get speed and duplex failed\n");
753 					break;
754 				}
755 			}
756 		}
757 	} else {
758 		speed = SPEED_10;
759 		duplex = HALF_DUPLEX;
760 	}
761 	adapter->link_speed = speed;
762 	adapter->link_duplex = duplex;
763 
764 	return ret;
765 }
766 
767 int atl1c_restart_autoneg(struct atl1c_hw *hw)
768 {
769 	int err = 0;
770 	u16 mii_bmcr_data = BMCR_RESET;
771 
772 	err = atl1c_phy_setup_adv(hw);
773 	if (err)
774 		return err;
775 	mii_bmcr_data |= BMCR_ANENABLE | BMCR_ANRESTART;
776 
777 	return atl1c_write_phy_reg(hw, MII_BMCR, mii_bmcr_data);
778 }
779 
780 int atl1c_power_saving(struct atl1c_hw *hw, u32 wufc)
781 {
782 	struct atl1c_adapter *adapter = hw->adapter;
783 	struct pci_dev *pdev = adapter->pdev;
784 	u32 master_ctrl, mac_ctrl, phy_ctrl;
785 	u32 wol_ctrl, speed;
786 	u16 phy_data;
787 
788 	wol_ctrl = 0;
789 	speed = adapter->link_speed == SPEED_1000 ?
790 		MAC_CTRL_SPEED_1000 : MAC_CTRL_SPEED_10_100;
791 
792 	AT_READ_REG(hw, REG_MASTER_CTRL, &master_ctrl);
793 	AT_READ_REG(hw, REG_MAC_CTRL, &mac_ctrl);
794 	AT_READ_REG(hw, REG_GPHY_CTRL, &phy_ctrl);
795 
796 	master_ctrl &= ~MASTER_CTRL_CLK_SEL_DIS;
797 	mac_ctrl = FIELD_SETX(mac_ctrl, MAC_CTRL_SPEED, speed);
798 	mac_ctrl &= ~(MAC_CTRL_DUPLX | MAC_CTRL_RX_EN | MAC_CTRL_TX_EN);
799 	if (adapter->link_duplex == FULL_DUPLEX)
800 		mac_ctrl |= MAC_CTRL_DUPLX;
801 	phy_ctrl &= ~(GPHY_CTRL_EXT_RESET | GPHY_CTRL_CLS);
802 	phy_ctrl |= GPHY_CTRL_SEL_ANA_RST | GPHY_CTRL_HIB_PULSE |
803 		GPHY_CTRL_HIB_EN;
804 	if (!wufc) { /* without WoL */
805 		master_ctrl |= MASTER_CTRL_CLK_SEL_DIS;
806 		phy_ctrl |= GPHY_CTRL_PHY_IDDQ | GPHY_CTRL_PWDOWN_HW;
807 		AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl);
808 		AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl);
809 		AT_WRITE_REG(hw, REG_GPHY_CTRL, phy_ctrl);
810 		AT_WRITE_REG(hw, REG_WOL_CTRL, 0);
811 		hw->phy_configured = false; /* re-init PHY when resume */
812 		return 0;
813 	}
814 	phy_ctrl |= GPHY_CTRL_EXT_RESET;
815 	if (wufc & AT_WUFC_MAG) {
816 		mac_ctrl |= MAC_CTRL_RX_EN | MAC_CTRL_BC_EN;
817 		wol_ctrl |= WOL_MAGIC_EN | WOL_MAGIC_PME_EN;
818 		if (hw->nic_type == athr_l2c_b && hw->revision_id == L2CB_V11)
819 			wol_ctrl |= WOL_PATTERN_EN | WOL_PATTERN_PME_EN;
820 	}
821 	if (wufc & AT_WUFC_LNKC) {
822 		wol_ctrl |= WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN;
823 		if (atl1c_write_phy_reg(hw, MII_IER, IER_LINK_UP) != 0) {
824 			dev_dbg(&pdev->dev, "%s: write phy MII_IER failed.\n",
825 				atl1c_driver_name);
826 		}
827 	}
828 	/* clear PHY interrupt */
829 	atl1c_read_phy_reg(hw, MII_ISR, &phy_data);
830 
831 	dev_dbg(&pdev->dev, "%s: suspend MAC=%x,MASTER=%x,PHY=0x%x,WOL=%x\n",
832 		atl1c_driver_name, mac_ctrl, master_ctrl, phy_ctrl, wol_ctrl);
833 	AT_WRITE_REG(hw, REG_MASTER_CTRL, master_ctrl);
834 	AT_WRITE_REG(hw, REG_MAC_CTRL, mac_ctrl);
835 	AT_WRITE_REG(hw, REG_GPHY_CTRL, phy_ctrl);
836 	AT_WRITE_REG(hw, REG_WOL_CTRL, wol_ctrl);
837 
838 	return 0;
839 }
840 
841 
842 /* configure phy after Link change Event */
843 void atl1c_post_phy_linkchg(struct atl1c_hw *hw, u16 link_speed)
844 {
845 	u16 phy_val;
846 	bool adj_thresh = false;
847 
848 	if (hw->nic_type == athr_l2c_b || hw->nic_type == athr_l2c_b2 ||
849 	    hw->nic_type == athr_l1d || hw->nic_type == athr_l1d_2)
850 		adj_thresh = true;
851 
852 	if (link_speed != SPEED_0) { /* link up */
853 		/* az with brcm, half-amp */
854 		if (hw->nic_type == athr_l1d_2) {
855 			atl1c_read_phy_ext(hw, MIIEXT_PCS, MIIEXT_CLDCTRL6,
856 				&phy_val);
857 			phy_val = FIELD_GETX(phy_val, CLDCTRL6_CAB_LEN);
858 			phy_val = phy_val > CLDCTRL6_CAB_LEN_SHORT ?
859 				AZ_ANADECT_LONG : AZ_ANADECT_DEF;
860 			atl1c_write_phy_dbg(hw, MIIDBG_AZ_ANADECT, phy_val);
861 		}
862 		/* threshold adjust */
863 		if (adj_thresh && link_speed == SPEED_100 && hw->msi_lnkpatch) {
864 			atl1c_write_phy_dbg(hw, MIIDBG_MSE16DB, L1D_MSE16DB_UP);
865 			atl1c_write_phy_dbg(hw, MIIDBG_SYSMODCTRL,
866 				L1D_SYSMODCTRL_IECHOADJ_DEF);
867 		}
868 	} else { /* link down */
869 		if (adj_thresh && hw->msi_lnkpatch) {
870 			atl1c_write_phy_dbg(hw, MIIDBG_SYSMODCTRL,
871 				SYSMODCTRL_IECHOADJ_DEF);
872 			atl1c_write_phy_dbg(hw, MIIDBG_MSE16DB,
873 				L1D_MSE16DB_DOWN);
874 		}
875 	}
876 }
877