1 /*
2 * AMD 10Gb Ethernet PHY driver
3 *
4 * This file is available to you under your choice of the following two
5 * licenses:
6 *
7 * License 1: GPLv2
8 *
9 * Copyright (c) 2014 Advanced Micro Devices, Inc.
10 *
11 * This file is free software; you may copy, redistribute and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation, either version 2 of the License, or (at
14 * your option) any later version.
15 *
16 * This file is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program. If not, see <http://www.gnu.org/licenses/>.
23 *
24 *
25 * License 2: Modified BSD
26 *
27 * Copyright (c) 2014 Advanced Micro Devices, Inc.
28 * All rights reserved.
29 *
30 * Redistribution and use in source and binary forms, with or without
31 * modification, are permitted provided that the following conditions are met:
32 * * Redistributions of source code must retain the above copyright
33 * notice, this list of conditions and the following disclaimer.
34 * * Redistributions in binary form must reproduce the above copyright
35 * notice, this list of conditions and the following disclaimer in the
36 * documentation and/or other materials provided with the distribution.
37 * * Neither the name of Advanced Micro Devices, Inc. nor the
38 * names of its contributors may be used to endorse or promote products
39 * derived from this software without specific prior written permission.
40 *
41 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
42 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
45 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
46 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
48 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
49 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
50 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
51 */
52
53 #include <linux/kernel.h>
54 #include <linux/device.h>
55 #include <linux/platform_device.h>
56 #include <linux/string.h>
57 #include <linux/errno.h>
58 #include <linux/unistd.h>
59 #include <linux/slab.h>
60 #include <linux/interrupt.h>
61 #include <linux/init.h>
62 #include <linux/delay.h>
63 #include <linux/workqueue.h>
64 #include <linux/netdevice.h>
65 #include <linux/etherdevice.h>
66 #include <linux/skbuff.h>
67 #include <linux/mm.h>
68 #include <linux/module.h>
69 #include <linux/mii.h>
70 #include <linux/ethtool.h>
71 #include <linux/phy.h>
72 #include <linux/mdio.h>
73 #include <linux/io.h>
74 #include <linux/of.h>
75 #include <linux/of_platform.h>
76 #include <linux/of_device.h>
77 #include <linux/uaccess.h>
78 #include <linux/bitops.h>
79 #include <linux/property.h>
80 #include <linux/acpi.h>
81 #include <linux/jiffies.h>
82
83 MODULE_AUTHOR("Tom Lendacky <thomas.lendacky@amd.com>");
84 MODULE_LICENSE("Dual BSD/GPL");
85 MODULE_VERSION("1.0.0-a");
86 MODULE_DESCRIPTION("AMD 10GbE (amd-xgbe) PHY driver");
87
88 #define XGBE_PHY_ID 0x000162d0
89 #define XGBE_PHY_MASK 0xfffffff0
90
91 #define XGBE_PHY_SPEEDSET_PROPERTY "amd,speed-set"
92 #define XGBE_PHY_BLWC_PROPERTY "amd,serdes-blwc"
93 #define XGBE_PHY_CDR_RATE_PROPERTY "amd,serdes-cdr-rate"
94 #define XGBE_PHY_PQ_SKEW_PROPERTY "amd,serdes-pq-skew"
95 #define XGBE_PHY_TX_AMP_PROPERTY "amd,serdes-tx-amp"
96 #define XGBE_PHY_DFE_CFG_PROPERTY "amd,serdes-dfe-tap-config"
97 #define XGBE_PHY_DFE_ENA_PROPERTY "amd,serdes-dfe-tap-enable"
98
99 #define XGBE_PHY_SPEEDS 3
100 #define XGBE_PHY_SPEED_1000 0
101 #define XGBE_PHY_SPEED_2500 1
102 #define XGBE_PHY_SPEED_10000 2
103
104 #define XGBE_AN_MS_TIMEOUT 500
105
106 #define XGBE_AN_INT_CMPLT 0x01
107 #define XGBE_AN_INC_LINK 0x02
108 #define XGBE_AN_PG_RCV 0x04
109 #define XGBE_AN_INT_MASK 0x07
110
111 #define XNP_MCF_NULL_MESSAGE 0x001
112 #define XNP_ACK_PROCESSED BIT(12)
113 #define XNP_MP_FORMATTED BIT(13)
114 #define XNP_NP_EXCHANGE BIT(15)
115
116 #define XGBE_PHY_RATECHANGE_COUNT 500
117
118 #define XGBE_PHY_KR_TRAINING_START 0x01
119 #define XGBE_PHY_KR_TRAINING_ENABLE 0x02
120
121 #define XGBE_PHY_FEC_ENABLE 0x01
122 #define XGBE_PHY_FEC_FORWARD 0x02
123 #define XGBE_PHY_FEC_MASK 0x03
124
125 #ifndef MDIO_PMA_10GBR_PMD_CTRL
126 #define MDIO_PMA_10GBR_PMD_CTRL 0x0096
127 #endif
128
129 #ifndef MDIO_PMA_10GBR_FEC_ABILITY
130 #define MDIO_PMA_10GBR_FEC_ABILITY 0x00aa
131 #endif
132
133 #ifndef MDIO_PMA_10GBR_FEC_CTRL
134 #define MDIO_PMA_10GBR_FEC_CTRL 0x00ab
135 #endif
136
137 #ifndef MDIO_AN_XNP
138 #define MDIO_AN_XNP 0x0016
139 #endif
140
141 #ifndef MDIO_AN_LPX
142 #define MDIO_AN_LPX 0x0019
143 #endif
144
145 #ifndef MDIO_AN_INTMASK
146 #define MDIO_AN_INTMASK 0x8001
147 #endif
148
149 #ifndef MDIO_AN_INT
150 #define MDIO_AN_INT 0x8002
151 #endif
152
153 #ifndef MDIO_CTRL1_SPEED1G
154 #define MDIO_CTRL1_SPEED1G (MDIO_CTRL1_SPEED10G & ~BMCR_SPEED100)
155 #endif
156
157 /* SerDes integration register offsets */
158 #define SIR0_KR_RT_1 0x002c
159 #define SIR0_STATUS 0x0040
160 #define SIR1_SPEED 0x0000
161
162 /* SerDes integration register entry bit positions and sizes */
163 #define SIR0_KR_RT_1_RESET_INDEX 11
164 #define SIR0_KR_RT_1_RESET_WIDTH 1
165 #define SIR0_STATUS_RX_READY_INDEX 0
166 #define SIR0_STATUS_RX_READY_WIDTH 1
167 #define SIR0_STATUS_TX_READY_INDEX 8
168 #define SIR0_STATUS_TX_READY_WIDTH 1
169 #define SIR1_SPEED_CDR_RATE_INDEX 12
170 #define SIR1_SPEED_CDR_RATE_WIDTH 4
171 #define SIR1_SPEED_DATARATE_INDEX 4
172 #define SIR1_SPEED_DATARATE_WIDTH 2
173 #define SIR1_SPEED_PLLSEL_INDEX 3
174 #define SIR1_SPEED_PLLSEL_WIDTH 1
175 #define SIR1_SPEED_RATECHANGE_INDEX 6
176 #define SIR1_SPEED_RATECHANGE_WIDTH 1
177 #define SIR1_SPEED_TXAMP_INDEX 8
178 #define SIR1_SPEED_TXAMP_WIDTH 4
179 #define SIR1_SPEED_WORDMODE_INDEX 0
180 #define SIR1_SPEED_WORDMODE_WIDTH 3
181
182 #define SPEED_10000_BLWC 0
183 #define SPEED_10000_CDR 0x7
184 #define SPEED_10000_PLL 0x1
185 #define SPEED_10000_PQ 0x12
186 #define SPEED_10000_RATE 0x0
187 #define SPEED_10000_TXAMP 0xa
188 #define SPEED_10000_WORD 0x7
189 #define SPEED_10000_DFE_TAP_CONFIG 0x1
190 #define SPEED_10000_DFE_TAP_ENABLE 0x7f
191
192 #define SPEED_2500_BLWC 1
193 #define SPEED_2500_CDR 0x2
194 #define SPEED_2500_PLL 0x0
195 #define SPEED_2500_PQ 0xa
196 #define SPEED_2500_RATE 0x1
197 #define SPEED_2500_TXAMP 0xf
198 #define SPEED_2500_WORD 0x1
199 #define SPEED_2500_DFE_TAP_CONFIG 0x3
200 #define SPEED_2500_DFE_TAP_ENABLE 0x0
201
202 #define SPEED_1000_BLWC 1
203 #define SPEED_1000_CDR 0x2
204 #define SPEED_1000_PLL 0x0
205 #define SPEED_1000_PQ 0xa
206 #define SPEED_1000_RATE 0x3
207 #define SPEED_1000_TXAMP 0xf
208 #define SPEED_1000_WORD 0x1
209 #define SPEED_1000_DFE_TAP_CONFIG 0x3
210 #define SPEED_1000_DFE_TAP_ENABLE 0x0
211
212 /* SerDes RxTx register offsets */
213 #define RXTX_REG6 0x0018
214 #define RXTX_REG20 0x0050
215 #define RXTX_REG22 0x0058
216 #define RXTX_REG114 0x01c8
217 #define RXTX_REG129 0x0204
218
219 /* SerDes RxTx register entry bit positions and sizes */
220 #define RXTX_REG6_RESETB_RXD_INDEX 8
221 #define RXTX_REG6_RESETB_RXD_WIDTH 1
222 #define RXTX_REG20_BLWC_ENA_INDEX 2
223 #define RXTX_REG20_BLWC_ENA_WIDTH 1
224 #define RXTX_REG114_PQ_REG_INDEX 9
225 #define RXTX_REG114_PQ_REG_WIDTH 7
226 #define RXTX_REG129_RXDFE_CONFIG_INDEX 14
227 #define RXTX_REG129_RXDFE_CONFIG_WIDTH 2
228
229 /* Bit setting and getting macros
230 * The get macro will extract the current bit field value from within
231 * the variable
232 *
233 * The set macro will clear the current bit field value within the
234 * variable and then set the bit field of the variable to the
235 * specified value
236 */
237 #define GET_BITS(_var, _index, _width) \
238 (((_var) >> (_index)) & ((0x1 << (_width)) - 1))
239
240 #define SET_BITS(_var, _index, _width, _val) \
241 do { \
242 (_var) &= ~(((0x1 << (_width)) - 1) << (_index)); \
243 (_var) |= (((_val) & ((0x1 << (_width)) - 1)) << (_index)); \
244 } while (0)
245
246 #define XSIR_GET_BITS(_var, _prefix, _field) \
247 GET_BITS((_var), \
248 _prefix##_##_field##_INDEX, \
249 _prefix##_##_field##_WIDTH)
250
251 #define XSIR_SET_BITS(_var, _prefix, _field, _val) \
252 SET_BITS((_var), \
253 _prefix##_##_field##_INDEX, \
254 _prefix##_##_field##_WIDTH, (_val))
255
256 /* Macros for reading or writing SerDes integration registers
257 * The ioread macros will get bit fields or full values using the
258 * register definitions formed using the input names
259 *
260 * The iowrite macros will set bit fields or full values using the
261 * register definitions formed using the input names
262 */
263 #define XSIR0_IOREAD(_priv, _reg) \
264 ioread16((_priv)->sir0_regs + _reg)
265
266 #define XSIR0_IOREAD_BITS(_priv, _reg, _field) \
267 GET_BITS(XSIR0_IOREAD((_priv), _reg), \
268 _reg##_##_field##_INDEX, \
269 _reg##_##_field##_WIDTH)
270
271 #define XSIR0_IOWRITE(_priv, _reg, _val) \
272 iowrite16((_val), (_priv)->sir0_regs + _reg)
273
274 #define XSIR0_IOWRITE_BITS(_priv, _reg, _field, _val) \
275 do { \
276 u16 reg_val = XSIR0_IOREAD((_priv), _reg); \
277 SET_BITS(reg_val, \
278 _reg##_##_field##_INDEX, \
279 _reg##_##_field##_WIDTH, (_val)); \
280 XSIR0_IOWRITE((_priv), _reg, reg_val); \
281 } while (0)
282
283 #define XSIR1_IOREAD(_priv, _reg) \
284 ioread16((_priv)->sir1_regs + _reg)
285
286 #define XSIR1_IOREAD_BITS(_priv, _reg, _field) \
287 GET_BITS(XSIR1_IOREAD((_priv), _reg), \
288 _reg##_##_field##_INDEX, \
289 _reg##_##_field##_WIDTH)
290
291 #define XSIR1_IOWRITE(_priv, _reg, _val) \
292 iowrite16((_val), (_priv)->sir1_regs + _reg)
293
294 #define XSIR1_IOWRITE_BITS(_priv, _reg, _field, _val) \
295 do { \
296 u16 reg_val = XSIR1_IOREAD((_priv), _reg); \
297 SET_BITS(reg_val, \
298 _reg##_##_field##_INDEX, \
299 _reg##_##_field##_WIDTH, (_val)); \
300 XSIR1_IOWRITE((_priv), _reg, reg_val); \
301 } while (0)
302
303 /* Macros for reading or writing SerDes RxTx registers
304 * The ioread macros will get bit fields or full values using the
305 * register definitions formed using the input names
306 *
307 * The iowrite macros will set bit fields or full values using the
308 * register definitions formed using the input names
309 */
310 #define XRXTX_IOREAD(_priv, _reg) \
311 ioread16((_priv)->rxtx_regs + _reg)
312
313 #define XRXTX_IOREAD_BITS(_priv, _reg, _field) \
314 GET_BITS(XRXTX_IOREAD((_priv), _reg), \
315 _reg##_##_field##_INDEX, \
316 _reg##_##_field##_WIDTH)
317
318 #define XRXTX_IOWRITE(_priv, _reg, _val) \
319 iowrite16((_val), (_priv)->rxtx_regs + _reg)
320
321 #define XRXTX_IOWRITE_BITS(_priv, _reg, _field, _val) \
322 do { \
323 u16 reg_val = XRXTX_IOREAD((_priv), _reg); \
324 SET_BITS(reg_val, \
325 _reg##_##_field##_INDEX, \
326 _reg##_##_field##_WIDTH, (_val)); \
327 XRXTX_IOWRITE((_priv), _reg, reg_val); \
328 } while (0)
329
330 static const u32 amd_xgbe_phy_serdes_blwc[] = {
331 SPEED_1000_BLWC,
332 SPEED_2500_BLWC,
333 SPEED_10000_BLWC,
334 };
335
336 static const u32 amd_xgbe_phy_serdes_cdr_rate[] = {
337 SPEED_1000_CDR,
338 SPEED_2500_CDR,
339 SPEED_10000_CDR,
340 };
341
342 static const u32 amd_xgbe_phy_serdes_pq_skew[] = {
343 SPEED_1000_PQ,
344 SPEED_2500_PQ,
345 SPEED_10000_PQ,
346 };
347
348 static const u32 amd_xgbe_phy_serdes_tx_amp[] = {
349 SPEED_1000_TXAMP,
350 SPEED_2500_TXAMP,
351 SPEED_10000_TXAMP,
352 };
353
354 static const u32 amd_xgbe_phy_serdes_dfe_tap_cfg[] = {
355 SPEED_1000_DFE_TAP_CONFIG,
356 SPEED_2500_DFE_TAP_CONFIG,
357 SPEED_10000_DFE_TAP_CONFIG,
358 };
359
360 static const u32 amd_xgbe_phy_serdes_dfe_tap_ena[] = {
361 SPEED_1000_DFE_TAP_ENABLE,
362 SPEED_2500_DFE_TAP_ENABLE,
363 SPEED_10000_DFE_TAP_ENABLE,
364 };
365
366 enum amd_xgbe_phy_an {
367 AMD_XGBE_AN_READY = 0,
368 AMD_XGBE_AN_PAGE_RECEIVED,
369 AMD_XGBE_AN_INCOMPAT_LINK,
370 AMD_XGBE_AN_COMPLETE,
371 AMD_XGBE_AN_NO_LINK,
372 AMD_XGBE_AN_ERROR,
373 };
374
375 enum amd_xgbe_phy_rx {
376 AMD_XGBE_RX_BPA = 0,
377 AMD_XGBE_RX_XNP,
378 AMD_XGBE_RX_COMPLETE,
379 AMD_XGBE_RX_ERROR,
380 };
381
382 enum amd_xgbe_phy_mode {
383 AMD_XGBE_MODE_KR,
384 AMD_XGBE_MODE_KX,
385 };
386
387 enum amd_xgbe_phy_speedset {
388 AMD_XGBE_PHY_SPEEDSET_1000_10000 = 0,
389 AMD_XGBE_PHY_SPEEDSET_2500_10000,
390 };
391
392 struct amd_xgbe_phy_priv {
393 struct platform_device *pdev;
394 struct acpi_device *adev;
395 struct device *dev;
396
397 struct phy_device *phydev;
398
399 /* SerDes related mmio resources */
400 struct resource *rxtx_res;
401 struct resource *sir0_res;
402 struct resource *sir1_res;
403
404 /* SerDes related mmio registers */
405 void __iomem *rxtx_regs; /* SerDes Rx/Tx CSRs */
406 void __iomem *sir0_regs; /* SerDes integration registers (1/2) */
407 void __iomem *sir1_regs; /* SerDes integration registers (2/2) */
408
409 int an_irq;
410 char an_irq_name[IFNAMSIZ + 32];
411 struct work_struct an_irq_work;
412 unsigned int an_irq_allocated;
413
414 unsigned int speed_set;
415
416 /* SerDes UEFI configurable settings.
417 * Switching between modes/speeds requires new values for some
418 * SerDes settings. The values can be supplied as device
419 * properties in array format. The first array entry is for
420 * 1GbE, second for 2.5GbE and third for 10GbE
421 */
422 u32 serdes_blwc[XGBE_PHY_SPEEDS];
423 u32 serdes_cdr_rate[XGBE_PHY_SPEEDS];
424 u32 serdes_pq_skew[XGBE_PHY_SPEEDS];
425 u32 serdes_tx_amp[XGBE_PHY_SPEEDS];
426 u32 serdes_dfe_tap_cfg[XGBE_PHY_SPEEDS];
427 u32 serdes_dfe_tap_ena[XGBE_PHY_SPEEDS];
428
429 /* Auto-negotiation state machine support */
430 struct mutex an_mutex;
431 enum amd_xgbe_phy_an an_result;
432 enum amd_xgbe_phy_an an_state;
433 enum amd_xgbe_phy_rx kr_state;
434 enum amd_xgbe_phy_rx kx_state;
435 struct work_struct an_work;
436 struct workqueue_struct *an_workqueue;
437 unsigned int an_supported;
438 unsigned int parallel_detect;
439 unsigned int fec_ability;
440 unsigned long an_start;
441
442 unsigned int lpm_ctrl; /* CTRL1 for resume */
443 };
444
amd_xgbe_an_enable_kr_training(struct phy_device * phydev)445 static int amd_xgbe_an_enable_kr_training(struct phy_device *phydev)
446 {
447 int ret;
448
449 ret = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_PMA_10GBR_PMD_CTRL);
450 if (ret < 0)
451 return ret;
452
453 ret |= XGBE_PHY_KR_TRAINING_ENABLE;
454 phy_write_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_PMA_10GBR_PMD_CTRL, ret);
455
456 return 0;
457 }
458
amd_xgbe_an_disable_kr_training(struct phy_device * phydev)459 static int amd_xgbe_an_disable_kr_training(struct phy_device *phydev)
460 {
461 int ret;
462
463 ret = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_PMA_10GBR_PMD_CTRL);
464 if (ret < 0)
465 return ret;
466
467 ret &= ~XGBE_PHY_KR_TRAINING_ENABLE;
468 phy_write_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_PMA_10GBR_PMD_CTRL, ret);
469
470 return 0;
471 }
472
amd_xgbe_phy_pcs_power_cycle(struct phy_device * phydev)473 static int amd_xgbe_phy_pcs_power_cycle(struct phy_device *phydev)
474 {
475 int ret;
476
477 ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1);
478 if (ret < 0)
479 return ret;
480
481 ret |= MDIO_CTRL1_LPOWER;
482 phy_write_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1, ret);
483
484 usleep_range(75, 100);
485
486 ret &= ~MDIO_CTRL1_LPOWER;
487 phy_write_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1, ret);
488
489 return 0;
490 }
491
amd_xgbe_phy_serdes_start_ratechange(struct phy_device * phydev)492 static void amd_xgbe_phy_serdes_start_ratechange(struct phy_device *phydev)
493 {
494 struct amd_xgbe_phy_priv *priv = phydev->priv;
495
496 /* Assert Rx and Tx ratechange */
497 XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, RATECHANGE, 1);
498 }
499
amd_xgbe_phy_serdes_complete_ratechange(struct phy_device * phydev)500 static void amd_xgbe_phy_serdes_complete_ratechange(struct phy_device *phydev)
501 {
502 struct amd_xgbe_phy_priv *priv = phydev->priv;
503 unsigned int wait;
504 u16 status;
505
506 /* Release Rx and Tx ratechange */
507 XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, RATECHANGE, 0);
508
509 /* Wait for Rx and Tx ready */
510 wait = XGBE_PHY_RATECHANGE_COUNT;
511 while (wait--) {
512 usleep_range(50, 75);
513
514 status = XSIR0_IOREAD(priv, SIR0_STATUS);
515 if (XSIR_GET_BITS(status, SIR0_STATUS, RX_READY) &&
516 XSIR_GET_BITS(status, SIR0_STATUS, TX_READY))
517 goto rx_reset;
518 }
519
520 netdev_dbg(phydev->attached_dev, "SerDes rx/tx not ready (%#hx)\n",
521 status);
522
523 rx_reset:
524 /* Perform Rx reset for the DFE changes */
525 XRXTX_IOWRITE_BITS(priv, RXTX_REG6, RESETB_RXD, 0);
526 XRXTX_IOWRITE_BITS(priv, RXTX_REG6, RESETB_RXD, 1);
527 }
528
amd_xgbe_phy_xgmii_mode(struct phy_device * phydev)529 static int amd_xgbe_phy_xgmii_mode(struct phy_device *phydev)
530 {
531 struct amd_xgbe_phy_priv *priv = phydev->priv;
532 int ret;
533
534 /* Enable KR training */
535 ret = amd_xgbe_an_enable_kr_training(phydev);
536 if (ret < 0)
537 return ret;
538
539 /* Set PCS to KR/10G speed */
540 ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL2);
541 if (ret < 0)
542 return ret;
543
544 ret &= ~MDIO_PCS_CTRL2_TYPE;
545 ret |= MDIO_PCS_CTRL2_10GBR;
546 phy_write_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL2, ret);
547
548 ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1);
549 if (ret < 0)
550 return ret;
551
552 ret &= ~MDIO_CTRL1_SPEEDSEL;
553 ret |= MDIO_CTRL1_SPEED10G;
554 phy_write_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1, ret);
555
556 ret = amd_xgbe_phy_pcs_power_cycle(phydev);
557 if (ret < 0)
558 return ret;
559
560 /* Set SerDes to 10G speed */
561 amd_xgbe_phy_serdes_start_ratechange(phydev);
562
563 XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, DATARATE, SPEED_10000_RATE);
564 XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, WORDMODE, SPEED_10000_WORD);
565 XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, PLLSEL, SPEED_10000_PLL);
566
567 XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, CDR_RATE,
568 priv->serdes_cdr_rate[XGBE_PHY_SPEED_10000]);
569 XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, TXAMP,
570 priv->serdes_tx_amp[XGBE_PHY_SPEED_10000]);
571 XRXTX_IOWRITE_BITS(priv, RXTX_REG20, BLWC_ENA,
572 priv->serdes_blwc[XGBE_PHY_SPEED_10000]);
573 XRXTX_IOWRITE_BITS(priv, RXTX_REG114, PQ_REG,
574 priv->serdes_pq_skew[XGBE_PHY_SPEED_10000]);
575 XRXTX_IOWRITE_BITS(priv, RXTX_REG129, RXDFE_CONFIG,
576 priv->serdes_dfe_tap_cfg[XGBE_PHY_SPEED_10000]);
577 XRXTX_IOWRITE(priv, RXTX_REG22,
578 priv->serdes_dfe_tap_ena[XGBE_PHY_SPEED_10000]);
579
580 amd_xgbe_phy_serdes_complete_ratechange(phydev);
581
582 return 0;
583 }
584
amd_xgbe_phy_gmii_2500_mode(struct phy_device * phydev)585 static int amd_xgbe_phy_gmii_2500_mode(struct phy_device *phydev)
586 {
587 struct amd_xgbe_phy_priv *priv = phydev->priv;
588 int ret;
589
590 /* Disable KR training */
591 ret = amd_xgbe_an_disable_kr_training(phydev);
592 if (ret < 0)
593 return ret;
594
595 /* Set PCS to KX/1G speed */
596 ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL2);
597 if (ret < 0)
598 return ret;
599
600 ret &= ~MDIO_PCS_CTRL2_TYPE;
601 ret |= MDIO_PCS_CTRL2_10GBX;
602 phy_write_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL2, ret);
603
604 ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1);
605 if (ret < 0)
606 return ret;
607
608 ret &= ~MDIO_CTRL1_SPEEDSEL;
609 ret |= MDIO_CTRL1_SPEED1G;
610 phy_write_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1, ret);
611
612 ret = amd_xgbe_phy_pcs_power_cycle(phydev);
613 if (ret < 0)
614 return ret;
615
616 /* Set SerDes to 2.5G speed */
617 amd_xgbe_phy_serdes_start_ratechange(phydev);
618
619 XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, DATARATE, SPEED_2500_RATE);
620 XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, WORDMODE, SPEED_2500_WORD);
621 XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, PLLSEL, SPEED_2500_PLL);
622
623 XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, CDR_RATE,
624 priv->serdes_cdr_rate[XGBE_PHY_SPEED_2500]);
625 XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, TXAMP,
626 priv->serdes_tx_amp[XGBE_PHY_SPEED_2500]);
627 XRXTX_IOWRITE_BITS(priv, RXTX_REG20, BLWC_ENA,
628 priv->serdes_blwc[XGBE_PHY_SPEED_2500]);
629 XRXTX_IOWRITE_BITS(priv, RXTX_REG114, PQ_REG,
630 priv->serdes_pq_skew[XGBE_PHY_SPEED_2500]);
631 XRXTX_IOWRITE_BITS(priv, RXTX_REG129, RXDFE_CONFIG,
632 priv->serdes_dfe_tap_cfg[XGBE_PHY_SPEED_2500]);
633 XRXTX_IOWRITE(priv, RXTX_REG22,
634 priv->serdes_dfe_tap_ena[XGBE_PHY_SPEED_2500]);
635
636 amd_xgbe_phy_serdes_complete_ratechange(phydev);
637
638 return 0;
639 }
640
amd_xgbe_phy_gmii_mode(struct phy_device * phydev)641 static int amd_xgbe_phy_gmii_mode(struct phy_device *phydev)
642 {
643 struct amd_xgbe_phy_priv *priv = phydev->priv;
644 int ret;
645
646 /* Disable KR training */
647 ret = amd_xgbe_an_disable_kr_training(phydev);
648 if (ret < 0)
649 return ret;
650
651 /* Set PCS to KX/1G speed */
652 ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL2);
653 if (ret < 0)
654 return ret;
655
656 ret &= ~MDIO_PCS_CTRL2_TYPE;
657 ret |= MDIO_PCS_CTRL2_10GBX;
658 phy_write_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL2, ret);
659
660 ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1);
661 if (ret < 0)
662 return ret;
663
664 ret &= ~MDIO_CTRL1_SPEEDSEL;
665 ret |= MDIO_CTRL1_SPEED1G;
666 phy_write_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1, ret);
667
668 ret = amd_xgbe_phy_pcs_power_cycle(phydev);
669 if (ret < 0)
670 return ret;
671
672 /* Set SerDes to 1G speed */
673 amd_xgbe_phy_serdes_start_ratechange(phydev);
674
675 XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, DATARATE, SPEED_1000_RATE);
676 XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, WORDMODE, SPEED_1000_WORD);
677 XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, PLLSEL, SPEED_1000_PLL);
678
679 XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, CDR_RATE,
680 priv->serdes_cdr_rate[XGBE_PHY_SPEED_1000]);
681 XSIR1_IOWRITE_BITS(priv, SIR1_SPEED, TXAMP,
682 priv->serdes_tx_amp[XGBE_PHY_SPEED_1000]);
683 XRXTX_IOWRITE_BITS(priv, RXTX_REG20, BLWC_ENA,
684 priv->serdes_blwc[XGBE_PHY_SPEED_1000]);
685 XRXTX_IOWRITE_BITS(priv, RXTX_REG114, PQ_REG,
686 priv->serdes_pq_skew[XGBE_PHY_SPEED_1000]);
687 XRXTX_IOWRITE_BITS(priv, RXTX_REG129, RXDFE_CONFIG,
688 priv->serdes_dfe_tap_cfg[XGBE_PHY_SPEED_1000]);
689 XRXTX_IOWRITE(priv, RXTX_REG22,
690 priv->serdes_dfe_tap_ena[XGBE_PHY_SPEED_1000]);
691
692 amd_xgbe_phy_serdes_complete_ratechange(phydev);
693
694 return 0;
695 }
696
amd_xgbe_phy_cur_mode(struct phy_device * phydev,enum amd_xgbe_phy_mode * mode)697 static int amd_xgbe_phy_cur_mode(struct phy_device *phydev,
698 enum amd_xgbe_phy_mode *mode)
699 {
700 int ret;
701
702 ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL2);
703 if (ret < 0)
704 return ret;
705
706 if ((ret & MDIO_PCS_CTRL2_TYPE) == MDIO_PCS_CTRL2_10GBR)
707 *mode = AMD_XGBE_MODE_KR;
708 else
709 *mode = AMD_XGBE_MODE_KX;
710
711 return 0;
712 }
713
amd_xgbe_phy_in_kr_mode(struct phy_device * phydev)714 static bool amd_xgbe_phy_in_kr_mode(struct phy_device *phydev)
715 {
716 enum amd_xgbe_phy_mode mode;
717
718 if (amd_xgbe_phy_cur_mode(phydev, &mode))
719 return false;
720
721 return (mode == AMD_XGBE_MODE_KR);
722 }
723
amd_xgbe_phy_switch_mode(struct phy_device * phydev)724 static int amd_xgbe_phy_switch_mode(struct phy_device *phydev)
725 {
726 struct amd_xgbe_phy_priv *priv = phydev->priv;
727 int ret;
728
729 /* If we are in KR switch to KX, and vice-versa */
730 if (amd_xgbe_phy_in_kr_mode(phydev)) {
731 if (priv->speed_set == AMD_XGBE_PHY_SPEEDSET_1000_10000)
732 ret = amd_xgbe_phy_gmii_mode(phydev);
733 else
734 ret = amd_xgbe_phy_gmii_2500_mode(phydev);
735 } else {
736 ret = amd_xgbe_phy_xgmii_mode(phydev);
737 }
738
739 return ret;
740 }
741
amd_xgbe_phy_set_mode(struct phy_device * phydev,enum amd_xgbe_phy_mode mode)742 static int amd_xgbe_phy_set_mode(struct phy_device *phydev,
743 enum amd_xgbe_phy_mode mode)
744 {
745 enum amd_xgbe_phy_mode cur_mode;
746 int ret;
747
748 ret = amd_xgbe_phy_cur_mode(phydev, &cur_mode);
749 if (ret)
750 return ret;
751
752 if (mode != cur_mode)
753 ret = amd_xgbe_phy_switch_mode(phydev);
754
755 return ret;
756 }
757
amd_xgbe_phy_use_xgmii_mode(struct phy_device * phydev)758 static bool amd_xgbe_phy_use_xgmii_mode(struct phy_device *phydev)
759 {
760 if (phydev->autoneg == AUTONEG_ENABLE) {
761 if (phydev->advertising & ADVERTISED_10000baseKR_Full)
762 return true;
763 } else {
764 if (phydev->speed == SPEED_10000)
765 return true;
766 }
767
768 return false;
769 }
770
amd_xgbe_phy_use_gmii_2500_mode(struct phy_device * phydev)771 static bool amd_xgbe_phy_use_gmii_2500_mode(struct phy_device *phydev)
772 {
773 if (phydev->autoneg == AUTONEG_ENABLE) {
774 if (phydev->advertising & ADVERTISED_2500baseX_Full)
775 return true;
776 } else {
777 if (phydev->speed == SPEED_2500)
778 return true;
779 }
780
781 return false;
782 }
783
amd_xgbe_phy_use_gmii_mode(struct phy_device * phydev)784 static bool amd_xgbe_phy_use_gmii_mode(struct phy_device *phydev)
785 {
786 if (phydev->autoneg == AUTONEG_ENABLE) {
787 if (phydev->advertising & ADVERTISED_1000baseKX_Full)
788 return true;
789 } else {
790 if (phydev->speed == SPEED_1000)
791 return true;
792 }
793
794 return false;
795 }
796
amd_xgbe_phy_set_an(struct phy_device * phydev,bool enable,bool restart)797 static int amd_xgbe_phy_set_an(struct phy_device *phydev, bool enable,
798 bool restart)
799 {
800 int ret;
801
802 ret = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_CTRL1);
803 if (ret < 0)
804 return ret;
805
806 ret &= ~MDIO_AN_CTRL1_ENABLE;
807
808 if (enable)
809 ret |= MDIO_AN_CTRL1_ENABLE;
810
811 if (restart)
812 ret |= MDIO_AN_CTRL1_RESTART;
813
814 phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_CTRL1, ret);
815
816 return 0;
817 }
818
amd_xgbe_phy_restart_an(struct phy_device * phydev)819 static int amd_xgbe_phy_restart_an(struct phy_device *phydev)
820 {
821 return amd_xgbe_phy_set_an(phydev, true, true);
822 }
823
amd_xgbe_phy_disable_an(struct phy_device * phydev)824 static int amd_xgbe_phy_disable_an(struct phy_device *phydev)
825 {
826 return amd_xgbe_phy_set_an(phydev, false, false);
827 }
828
amd_xgbe_an_tx_training(struct phy_device * phydev,enum amd_xgbe_phy_rx * state)829 static enum amd_xgbe_phy_an amd_xgbe_an_tx_training(struct phy_device *phydev,
830 enum amd_xgbe_phy_rx *state)
831 {
832 struct amd_xgbe_phy_priv *priv = phydev->priv;
833 int ad_reg, lp_reg, ret;
834
835 *state = AMD_XGBE_RX_COMPLETE;
836
837 /* If we're not in KR mode then we're done */
838 if (!amd_xgbe_phy_in_kr_mode(phydev))
839 return AMD_XGBE_AN_PAGE_RECEIVED;
840
841 /* Enable/Disable FEC */
842 ad_reg = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 2);
843 if (ad_reg < 0)
844 return AMD_XGBE_AN_ERROR;
845
846 lp_reg = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_LPA + 2);
847 if (lp_reg < 0)
848 return AMD_XGBE_AN_ERROR;
849
850 ret = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_PMA_10GBR_FEC_CTRL);
851 if (ret < 0)
852 return AMD_XGBE_AN_ERROR;
853
854 ret &= ~XGBE_PHY_FEC_MASK;
855 if ((ad_reg & 0xc000) && (lp_reg & 0xc000))
856 ret |= priv->fec_ability;
857
858 phy_write_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_PMA_10GBR_FEC_CTRL, ret);
859
860 /* Start KR training */
861 ret = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_PMA_10GBR_PMD_CTRL);
862 if (ret < 0)
863 return AMD_XGBE_AN_ERROR;
864
865 if (ret & XGBE_PHY_KR_TRAINING_ENABLE) {
866 XSIR0_IOWRITE_BITS(priv, SIR0_KR_RT_1, RESET, 1);
867
868 ret |= XGBE_PHY_KR_TRAINING_START;
869 phy_write_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_PMA_10GBR_PMD_CTRL,
870 ret);
871
872 XSIR0_IOWRITE_BITS(priv, SIR0_KR_RT_1, RESET, 0);
873 }
874
875 return AMD_XGBE_AN_PAGE_RECEIVED;
876 }
877
amd_xgbe_an_tx_xnp(struct phy_device * phydev,enum amd_xgbe_phy_rx * state)878 static enum amd_xgbe_phy_an amd_xgbe_an_tx_xnp(struct phy_device *phydev,
879 enum amd_xgbe_phy_rx *state)
880 {
881 u16 msg;
882
883 *state = AMD_XGBE_RX_XNP;
884
885 msg = XNP_MCF_NULL_MESSAGE;
886 msg |= XNP_MP_FORMATTED;
887
888 phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_XNP + 2, 0);
889 phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_XNP + 1, 0);
890 phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_XNP, msg);
891
892 return AMD_XGBE_AN_PAGE_RECEIVED;
893 }
894
amd_xgbe_an_rx_bpa(struct phy_device * phydev,enum amd_xgbe_phy_rx * state)895 static enum amd_xgbe_phy_an amd_xgbe_an_rx_bpa(struct phy_device *phydev,
896 enum amd_xgbe_phy_rx *state)
897 {
898 unsigned int link_support;
899 int ret, ad_reg, lp_reg;
900
901 /* Read Base Ability register 2 first */
902 ret = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_LPA + 1);
903 if (ret < 0)
904 return AMD_XGBE_AN_ERROR;
905
906 /* Check for a supported mode, otherwise restart in a different one */
907 link_support = amd_xgbe_phy_in_kr_mode(phydev) ? 0x80 : 0x20;
908 if (!(ret & link_support))
909 return AMD_XGBE_AN_INCOMPAT_LINK;
910
911 /* Check Extended Next Page support */
912 ad_reg = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_ADVERTISE);
913 if (ad_reg < 0)
914 return AMD_XGBE_AN_ERROR;
915
916 lp_reg = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_LPA);
917 if (lp_reg < 0)
918 return AMD_XGBE_AN_ERROR;
919
920 return ((ad_reg & XNP_NP_EXCHANGE) || (lp_reg & XNP_NP_EXCHANGE)) ?
921 amd_xgbe_an_tx_xnp(phydev, state) :
922 amd_xgbe_an_tx_training(phydev, state);
923 }
924
amd_xgbe_an_rx_xnp(struct phy_device * phydev,enum amd_xgbe_phy_rx * state)925 static enum amd_xgbe_phy_an amd_xgbe_an_rx_xnp(struct phy_device *phydev,
926 enum amd_xgbe_phy_rx *state)
927 {
928 int ad_reg, lp_reg;
929
930 /* Check Extended Next Page support */
931 ad_reg = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_XNP);
932 if (ad_reg < 0)
933 return AMD_XGBE_AN_ERROR;
934
935 lp_reg = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_LPX);
936 if (lp_reg < 0)
937 return AMD_XGBE_AN_ERROR;
938
939 return ((ad_reg & XNP_NP_EXCHANGE) || (lp_reg & XNP_NP_EXCHANGE)) ?
940 amd_xgbe_an_tx_xnp(phydev, state) :
941 amd_xgbe_an_tx_training(phydev, state);
942 }
943
amd_xgbe_an_page_received(struct phy_device * phydev)944 static enum amd_xgbe_phy_an amd_xgbe_an_page_received(struct phy_device *phydev)
945 {
946 struct amd_xgbe_phy_priv *priv = phydev->priv;
947 enum amd_xgbe_phy_rx *state;
948 unsigned long an_timeout;
949 int ret;
950
951 if (!priv->an_start) {
952 priv->an_start = jiffies;
953 } else {
954 an_timeout = priv->an_start +
955 msecs_to_jiffies(XGBE_AN_MS_TIMEOUT);
956 if (time_after(jiffies, an_timeout)) {
957 /* Auto-negotiation timed out, reset state */
958 priv->kr_state = AMD_XGBE_RX_BPA;
959 priv->kx_state = AMD_XGBE_RX_BPA;
960
961 priv->an_start = jiffies;
962 }
963 }
964
965 state = amd_xgbe_phy_in_kr_mode(phydev) ? &priv->kr_state
966 : &priv->kx_state;
967
968 switch (*state) {
969 case AMD_XGBE_RX_BPA:
970 ret = amd_xgbe_an_rx_bpa(phydev, state);
971 break;
972
973 case AMD_XGBE_RX_XNP:
974 ret = amd_xgbe_an_rx_xnp(phydev, state);
975 break;
976
977 default:
978 ret = AMD_XGBE_AN_ERROR;
979 }
980
981 return ret;
982 }
983
amd_xgbe_an_incompat_link(struct phy_device * phydev)984 static enum amd_xgbe_phy_an amd_xgbe_an_incompat_link(struct phy_device *phydev)
985 {
986 struct amd_xgbe_phy_priv *priv = phydev->priv;
987 int ret;
988
989 /* Be sure we aren't looping trying to negotiate */
990 if (amd_xgbe_phy_in_kr_mode(phydev)) {
991 priv->kr_state = AMD_XGBE_RX_ERROR;
992
993 if (!(phydev->advertising & SUPPORTED_1000baseKX_Full) &&
994 !(phydev->advertising & SUPPORTED_2500baseX_Full))
995 return AMD_XGBE_AN_NO_LINK;
996
997 if (priv->kx_state != AMD_XGBE_RX_BPA)
998 return AMD_XGBE_AN_NO_LINK;
999 } else {
1000 priv->kx_state = AMD_XGBE_RX_ERROR;
1001
1002 if (!(phydev->advertising & SUPPORTED_10000baseKR_Full))
1003 return AMD_XGBE_AN_NO_LINK;
1004
1005 if (priv->kr_state != AMD_XGBE_RX_BPA)
1006 return AMD_XGBE_AN_NO_LINK;
1007 }
1008
1009 ret = amd_xgbe_phy_disable_an(phydev);
1010 if (ret)
1011 return AMD_XGBE_AN_ERROR;
1012
1013 ret = amd_xgbe_phy_switch_mode(phydev);
1014 if (ret)
1015 return AMD_XGBE_AN_ERROR;
1016
1017 ret = amd_xgbe_phy_restart_an(phydev);
1018 if (ret)
1019 return AMD_XGBE_AN_ERROR;
1020
1021 return AMD_XGBE_AN_INCOMPAT_LINK;
1022 }
1023
amd_xgbe_an_isr(int irq,void * data)1024 static irqreturn_t amd_xgbe_an_isr(int irq, void *data)
1025 {
1026 struct amd_xgbe_phy_priv *priv = (struct amd_xgbe_phy_priv *)data;
1027
1028 /* Interrupt reason must be read and cleared outside of IRQ context */
1029 disable_irq_nosync(priv->an_irq);
1030
1031 queue_work(priv->an_workqueue, &priv->an_irq_work);
1032
1033 return IRQ_HANDLED;
1034 }
1035
amd_xgbe_an_irq_work(struct work_struct * work)1036 static void amd_xgbe_an_irq_work(struct work_struct *work)
1037 {
1038 struct amd_xgbe_phy_priv *priv = container_of(work,
1039 struct amd_xgbe_phy_priv,
1040 an_irq_work);
1041
1042 /* Avoid a race between enabling the IRQ and exiting the work by
1043 * waiting for the work to finish and then queueing it
1044 */
1045 flush_work(&priv->an_work);
1046 queue_work(priv->an_workqueue, &priv->an_work);
1047 }
1048
amd_xgbe_an_state_machine(struct work_struct * work)1049 static void amd_xgbe_an_state_machine(struct work_struct *work)
1050 {
1051 struct amd_xgbe_phy_priv *priv = container_of(work,
1052 struct amd_xgbe_phy_priv,
1053 an_work);
1054 struct phy_device *phydev = priv->phydev;
1055 enum amd_xgbe_phy_an cur_state = priv->an_state;
1056 int int_reg, int_mask;
1057
1058 mutex_lock(&priv->an_mutex);
1059
1060 /* Read the interrupt */
1061 int_reg = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_INT);
1062 if (!int_reg)
1063 goto out;
1064
1065 next_int:
1066 if (int_reg < 0) {
1067 priv->an_state = AMD_XGBE_AN_ERROR;
1068 int_mask = XGBE_AN_INT_MASK;
1069 } else if (int_reg & XGBE_AN_PG_RCV) {
1070 priv->an_state = AMD_XGBE_AN_PAGE_RECEIVED;
1071 int_mask = XGBE_AN_PG_RCV;
1072 } else if (int_reg & XGBE_AN_INC_LINK) {
1073 priv->an_state = AMD_XGBE_AN_INCOMPAT_LINK;
1074 int_mask = XGBE_AN_INC_LINK;
1075 } else if (int_reg & XGBE_AN_INT_CMPLT) {
1076 priv->an_state = AMD_XGBE_AN_COMPLETE;
1077 int_mask = XGBE_AN_INT_CMPLT;
1078 } else {
1079 priv->an_state = AMD_XGBE_AN_ERROR;
1080 int_mask = 0;
1081 }
1082
1083 /* Clear the interrupt to be processed */
1084 int_reg &= ~int_mask;
1085 phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_INT, int_reg);
1086
1087 priv->an_result = priv->an_state;
1088
1089 again:
1090 cur_state = priv->an_state;
1091
1092 switch (priv->an_state) {
1093 case AMD_XGBE_AN_READY:
1094 priv->an_supported = 0;
1095 break;
1096
1097 case AMD_XGBE_AN_PAGE_RECEIVED:
1098 priv->an_state = amd_xgbe_an_page_received(phydev);
1099 priv->an_supported++;
1100 break;
1101
1102 case AMD_XGBE_AN_INCOMPAT_LINK:
1103 priv->an_supported = 0;
1104 priv->parallel_detect = 0;
1105 priv->an_state = amd_xgbe_an_incompat_link(phydev);
1106 break;
1107
1108 case AMD_XGBE_AN_COMPLETE:
1109 priv->parallel_detect = priv->an_supported ? 0 : 1;
1110 netdev_dbg(phydev->attached_dev, "%s successful\n",
1111 priv->an_supported ? "Auto negotiation"
1112 : "Parallel detection");
1113 break;
1114
1115 case AMD_XGBE_AN_NO_LINK:
1116 break;
1117
1118 default:
1119 priv->an_state = AMD_XGBE_AN_ERROR;
1120 }
1121
1122 if (priv->an_state == AMD_XGBE_AN_NO_LINK) {
1123 int_reg = 0;
1124 phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_INT, 0);
1125 } else if (priv->an_state == AMD_XGBE_AN_ERROR) {
1126 netdev_err(phydev->attached_dev,
1127 "error during auto-negotiation, state=%u\n",
1128 cur_state);
1129
1130 int_reg = 0;
1131 phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_INT, 0);
1132 }
1133
1134 if (priv->an_state >= AMD_XGBE_AN_COMPLETE) {
1135 priv->an_result = priv->an_state;
1136 priv->an_state = AMD_XGBE_AN_READY;
1137 priv->kr_state = AMD_XGBE_RX_BPA;
1138 priv->kx_state = AMD_XGBE_RX_BPA;
1139 priv->an_start = 0;
1140 }
1141
1142 if (cur_state != priv->an_state)
1143 goto again;
1144
1145 if (int_reg)
1146 goto next_int;
1147
1148 out:
1149 enable_irq(priv->an_irq);
1150
1151 mutex_unlock(&priv->an_mutex);
1152 }
1153
amd_xgbe_an_init(struct phy_device * phydev)1154 static int amd_xgbe_an_init(struct phy_device *phydev)
1155 {
1156 int ret;
1157
1158 /* Set up Advertisement register 3 first */
1159 ret = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 2);
1160 if (ret < 0)
1161 return ret;
1162
1163 if (phydev->advertising & SUPPORTED_10000baseR_FEC)
1164 ret |= 0xc000;
1165 else
1166 ret &= ~0xc000;
1167
1168 phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 2, ret);
1169
1170 /* Set up Advertisement register 2 next */
1171 ret = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 1);
1172 if (ret < 0)
1173 return ret;
1174
1175 if (phydev->advertising & SUPPORTED_10000baseKR_Full)
1176 ret |= 0x80;
1177 else
1178 ret &= ~0x80;
1179
1180 if ((phydev->advertising & SUPPORTED_1000baseKX_Full) ||
1181 (phydev->advertising & SUPPORTED_2500baseX_Full))
1182 ret |= 0x20;
1183 else
1184 ret &= ~0x20;
1185
1186 phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 1, ret);
1187
1188 /* Set up Advertisement register 1 last */
1189 ret = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_ADVERTISE);
1190 if (ret < 0)
1191 return ret;
1192
1193 if (phydev->advertising & SUPPORTED_Pause)
1194 ret |= 0x400;
1195 else
1196 ret &= ~0x400;
1197
1198 if (phydev->advertising & SUPPORTED_Asym_Pause)
1199 ret |= 0x800;
1200 else
1201 ret &= ~0x800;
1202
1203 /* We don't intend to perform XNP */
1204 ret &= ~XNP_NP_EXCHANGE;
1205
1206 phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_ADVERTISE, ret);
1207
1208 return 0;
1209 }
1210
amd_xgbe_phy_soft_reset(struct phy_device * phydev)1211 static int amd_xgbe_phy_soft_reset(struct phy_device *phydev)
1212 {
1213 int count, ret;
1214
1215 ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1);
1216 if (ret < 0)
1217 return ret;
1218
1219 ret |= MDIO_CTRL1_RESET;
1220 phy_write_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1, ret);
1221
1222 count = 50;
1223 do {
1224 msleep(20);
1225 ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1);
1226 if (ret < 0)
1227 return ret;
1228 } while ((ret & MDIO_CTRL1_RESET) && --count);
1229
1230 if (ret & MDIO_CTRL1_RESET)
1231 return -ETIMEDOUT;
1232
1233 /* Disable auto-negotiation for now */
1234 ret = amd_xgbe_phy_disable_an(phydev);
1235 if (ret < 0)
1236 return ret;
1237
1238 /* Clear auto-negotiation interrupts */
1239 phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_INT, 0);
1240
1241 return 0;
1242 }
1243
amd_xgbe_phy_config_init(struct phy_device * phydev)1244 static int amd_xgbe_phy_config_init(struct phy_device *phydev)
1245 {
1246 struct amd_xgbe_phy_priv *priv = phydev->priv;
1247 struct net_device *netdev = phydev->attached_dev;
1248 int ret;
1249
1250 if (!priv->an_irq_allocated) {
1251 /* Allocate the auto-negotiation workqueue and interrupt */
1252 snprintf(priv->an_irq_name, sizeof(priv->an_irq_name) - 1,
1253 "%s-pcs", netdev_name(netdev));
1254
1255 priv->an_workqueue =
1256 create_singlethread_workqueue(priv->an_irq_name);
1257 if (!priv->an_workqueue) {
1258 netdev_err(netdev, "phy workqueue creation failed\n");
1259 return -ENOMEM;
1260 }
1261
1262 ret = devm_request_irq(priv->dev, priv->an_irq,
1263 amd_xgbe_an_isr, 0, priv->an_irq_name,
1264 priv);
1265 if (ret) {
1266 netdev_err(netdev, "phy irq request failed\n");
1267 destroy_workqueue(priv->an_workqueue);
1268 return ret;
1269 }
1270
1271 priv->an_irq_allocated = 1;
1272 }
1273
1274 /* Set initial mode - call the mode setting routines
1275 * directly to insure we are properly configured
1276 */
1277 if (amd_xgbe_phy_use_xgmii_mode(phydev))
1278 ret = amd_xgbe_phy_xgmii_mode(phydev);
1279 else if (amd_xgbe_phy_use_gmii_mode(phydev))
1280 ret = amd_xgbe_phy_gmii_mode(phydev);
1281 else if (amd_xgbe_phy_use_gmii_2500_mode(phydev))
1282 ret = amd_xgbe_phy_gmii_2500_mode(phydev);
1283 else
1284 ret = -EINVAL;
1285 if (ret < 0)
1286 return ret;
1287
1288 /* Set up advertisement registers based on current settings */
1289 ret = amd_xgbe_an_init(phydev);
1290 if (ret)
1291 return ret;
1292
1293 /* Enable auto-negotiation interrupts */
1294 phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_INTMASK, 0x07);
1295
1296 return 0;
1297 }
1298
amd_xgbe_phy_setup_forced(struct phy_device * phydev)1299 static int amd_xgbe_phy_setup_forced(struct phy_device *phydev)
1300 {
1301 int ret;
1302
1303 /* Disable auto-negotiation */
1304 ret = amd_xgbe_phy_disable_an(phydev);
1305 if (ret < 0)
1306 return ret;
1307
1308 /* Validate/Set specified speed */
1309 switch (phydev->speed) {
1310 case SPEED_10000:
1311 ret = amd_xgbe_phy_set_mode(phydev, AMD_XGBE_MODE_KR);
1312 break;
1313
1314 case SPEED_2500:
1315 case SPEED_1000:
1316 ret = amd_xgbe_phy_set_mode(phydev, AMD_XGBE_MODE_KX);
1317 break;
1318
1319 default:
1320 ret = -EINVAL;
1321 }
1322
1323 if (ret < 0)
1324 return ret;
1325
1326 /* Validate duplex mode */
1327 if (phydev->duplex != DUPLEX_FULL)
1328 return -EINVAL;
1329
1330 phydev->pause = 0;
1331 phydev->asym_pause = 0;
1332
1333 return 0;
1334 }
1335
__amd_xgbe_phy_config_aneg(struct phy_device * phydev)1336 static int __amd_xgbe_phy_config_aneg(struct phy_device *phydev)
1337 {
1338 struct amd_xgbe_phy_priv *priv = phydev->priv;
1339 u32 mmd_mask = phydev->c45_ids.devices_in_package;
1340 int ret;
1341
1342 if (phydev->autoneg != AUTONEG_ENABLE)
1343 return amd_xgbe_phy_setup_forced(phydev);
1344
1345 /* Make sure we have the AN MMD present */
1346 if (!(mmd_mask & MDIO_DEVS_AN))
1347 return -EINVAL;
1348
1349 /* Disable auto-negotiation interrupt */
1350 disable_irq(priv->an_irq);
1351
1352 /* Start auto-negotiation in a supported mode */
1353 if (phydev->advertising & SUPPORTED_10000baseKR_Full)
1354 ret = amd_xgbe_phy_set_mode(phydev, AMD_XGBE_MODE_KR);
1355 else if ((phydev->advertising & SUPPORTED_1000baseKX_Full) ||
1356 (phydev->advertising & SUPPORTED_2500baseX_Full))
1357 ret = amd_xgbe_phy_set_mode(phydev, AMD_XGBE_MODE_KX);
1358 else
1359 ret = -EINVAL;
1360 if (ret < 0) {
1361 enable_irq(priv->an_irq);
1362 return ret;
1363 }
1364
1365 /* Disable and stop any in progress auto-negotiation */
1366 ret = amd_xgbe_phy_disable_an(phydev);
1367 if (ret < 0)
1368 return ret;
1369
1370 /* Clear any auto-negotitation interrupts */
1371 phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_INT, 0);
1372
1373 priv->an_result = AMD_XGBE_AN_READY;
1374 priv->an_state = AMD_XGBE_AN_READY;
1375 priv->kr_state = AMD_XGBE_RX_BPA;
1376 priv->kx_state = AMD_XGBE_RX_BPA;
1377
1378 /* Re-enable auto-negotiation interrupt */
1379 enable_irq(priv->an_irq);
1380
1381 /* Set up advertisement registers based on current settings */
1382 ret = amd_xgbe_an_init(phydev);
1383 if (ret)
1384 return ret;
1385
1386 /* Enable and start auto-negotiation */
1387 return amd_xgbe_phy_restart_an(phydev);
1388 }
1389
amd_xgbe_phy_config_aneg(struct phy_device * phydev)1390 static int amd_xgbe_phy_config_aneg(struct phy_device *phydev)
1391 {
1392 struct amd_xgbe_phy_priv *priv = phydev->priv;
1393 int ret;
1394
1395 mutex_lock(&priv->an_mutex);
1396
1397 ret = __amd_xgbe_phy_config_aneg(phydev);
1398
1399 mutex_unlock(&priv->an_mutex);
1400
1401 return ret;
1402 }
1403
amd_xgbe_phy_aneg_done(struct phy_device * phydev)1404 static int amd_xgbe_phy_aneg_done(struct phy_device *phydev)
1405 {
1406 struct amd_xgbe_phy_priv *priv = phydev->priv;
1407
1408 return (priv->an_result == AMD_XGBE_AN_COMPLETE);
1409 }
1410
amd_xgbe_phy_update_link(struct phy_device * phydev)1411 static int amd_xgbe_phy_update_link(struct phy_device *phydev)
1412 {
1413 struct amd_xgbe_phy_priv *priv = phydev->priv;
1414 int ret;
1415
1416 /* If we're doing auto-negotiation don't report link down */
1417 if (priv->an_state != AMD_XGBE_AN_READY) {
1418 phydev->link = 1;
1419 return 0;
1420 }
1421
1422 /* Link status is latched low, so read once to clear
1423 * and then read again to get current state
1424 */
1425 ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_STAT1);
1426 if (ret < 0)
1427 return ret;
1428
1429 ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_STAT1);
1430 if (ret < 0)
1431 return ret;
1432
1433 phydev->link = (ret & MDIO_STAT1_LSTATUS) ? 1 : 0;
1434
1435 return 0;
1436 }
1437
amd_xgbe_phy_read_status(struct phy_device * phydev)1438 static int amd_xgbe_phy_read_status(struct phy_device *phydev)
1439 {
1440 struct amd_xgbe_phy_priv *priv = phydev->priv;
1441 u32 mmd_mask = phydev->c45_ids.devices_in_package;
1442 int ret, ad_ret, lp_ret;
1443
1444 ret = amd_xgbe_phy_update_link(phydev);
1445 if (ret)
1446 return ret;
1447
1448 if ((phydev->autoneg == AUTONEG_ENABLE) &&
1449 !priv->parallel_detect) {
1450 if (!(mmd_mask & MDIO_DEVS_AN))
1451 return -EINVAL;
1452
1453 if (!amd_xgbe_phy_aneg_done(phydev))
1454 return 0;
1455
1456 /* Compare Advertisement and Link Partner register 1 */
1457 ad_ret = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_ADVERTISE);
1458 if (ad_ret < 0)
1459 return ad_ret;
1460 lp_ret = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_LPA);
1461 if (lp_ret < 0)
1462 return lp_ret;
1463
1464 ad_ret &= lp_ret;
1465 phydev->pause = (ad_ret & 0x400) ? 1 : 0;
1466 phydev->asym_pause = (ad_ret & 0x800) ? 1 : 0;
1467
1468 /* Compare Advertisement and Link Partner register 2 */
1469 ad_ret = phy_read_mmd(phydev, MDIO_MMD_AN,
1470 MDIO_AN_ADVERTISE + 1);
1471 if (ad_ret < 0)
1472 return ad_ret;
1473 lp_ret = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_LPA + 1);
1474 if (lp_ret < 0)
1475 return lp_ret;
1476
1477 ad_ret &= lp_ret;
1478 if (ad_ret & 0x80) {
1479 phydev->speed = SPEED_10000;
1480 ret = amd_xgbe_phy_set_mode(phydev, AMD_XGBE_MODE_KR);
1481 if (ret)
1482 return ret;
1483 } else {
1484 switch (priv->speed_set) {
1485 case AMD_XGBE_PHY_SPEEDSET_1000_10000:
1486 phydev->speed = SPEED_1000;
1487 break;
1488
1489 case AMD_XGBE_PHY_SPEEDSET_2500_10000:
1490 phydev->speed = SPEED_2500;
1491 break;
1492 }
1493
1494 ret = amd_xgbe_phy_set_mode(phydev, AMD_XGBE_MODE_KX);
1495 if (ret)
1496 return ret;
1497 }
1498
1499 phydev->duplex = DUPLEX_FULL;
1500 } else {
1501 if (amd_xgbe_phy_in_kr_mode(phydev)) {
1502 phydev->speed = SPEED_10000;
1503 } else {
1504 switch (priv->speed_set) {
1505 case AMD_XGBE_PHY_SPEEDSET_1000_10000:
1506 phydev->speed = SPEED_1000;
1507 break;
1508
1509 case AMD_XGBE_PHY_SPEEDSET_2500_10000:
1510 phydev->speed = SPEED_2500;
1511 break;
1512 }
1513 }
1514 phydev->duplex = DUPLEX_FULL;
1515 phydev->pause = 0;
1516 phydev->asym_pause = 0;
1517 }
1518
1519 return 0;
1520 }
1521
amd_xgbe_phy_suspend(struct phy_device * phydev)1522 static int amd_xgbe_phy_suspend(struct phy_device *phydev)
1523 {
1524 struct amd_xgbe_phy_priv *priv = phydev->priv;
1525 int ret;
1526
1527 mutex_lock(&phydev->lock);
1528
1529 ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1);
1530 if (ret < 0)
1531 goto unlock;
1532
1533 priv->lpm_ctrl = ret;
1534
1535 ret |= MDIO_CTRL1_LPOWER;
1536 phy_write_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1, ret);
1537
1538 ret = 0;
1539
1540 unlock:
1541 mutex_unlock(&phydev->lock);
1542
1543 return ret;
1544 }
1545
amd_xgbe_phy_resume(struct phy_device * phydev)1546 static int amd_xgbe_phy_resume(struct phy_device *phydev)
1547 {
1548 struct amd_xgbe_phy_priv *priv = phydev->priv;
1549
1550 mutex_lock(&phydev->lock);
1551
1552 priv->lpm_ctrl &= ~MDIO_CTRL1_LPOWER;
1553 phy_write_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1, priv->lpm_ctrl);
1554
1555 mutex_unlock(&phydev->lock);
1556
1557 return 0;
1558 }
1559
amd_xgbe_phy_resource_count(struct platform_device * pdev,unsigned int type)1560 static unsigned int amd_xgbe_phy_resource_count(struct platform_device *pdev,
1561 unsigned int type)
1562 {
1563 unsigned int count;
1564 int i;
1565
1566 for (i = 0, count = 0; i < pdev->num_resources; i++) {
1567 struct resource *r = &pdev->resource[i];
1568
1569 if (type == resource_type(r))
1570 count++;
1571 }
1572
1573 return count;
1574 }
1575
amd_xgbe_phy_probe(struct phy_device * phydev)1576 static int amd_xgbe_phy_probe(struct phy_device *phydev)
1577 {
1578 struct amd_xgbe_phy_priv *priv;
1579 struct platform_device *phy_pdev;
1580 struct device *dev, *phy_dev;
1581 unsigned int phy_resnum, phy_irqnum;
1582 int ret;
1583
1584 if (!phydev->bus || !phydev->bus->parent)
1585 return -EINVAL;
1586
1587 dev = phydev->bus->parent;
1588
1589 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
1590 if (!priv)
1591 return -ENOMEM;
1592
1593 priv->pdev = to_platform_device(dev);
1594 priv->adev = ACPI_COMPANION(dev);
1595 priv->dev = dev;
1596 priv->phydev = phydev;
1597 mutex_init(&priv->an_mutex);
1598 INIT_WORK(&priv->an_irq_work, amd_xgbe_an_irq_work);
1599 INIT_WORK(&priv->an_work, amd_xgbe_an_state_machine);
1600
1601 if (!priv->adev || acpi_disabled) {
1602 struct device_node *bus_node;
1603 struct device_node *phy_node;
1604
1605 bus_node = priv->dev->of_node;
1606 phy_node = of_parse_phandle(bus_node, "phy-handle", 0);
1607 if (!phy_node) {
1608 dev_err(dev, "unable to parse phy-handle\n");
1609 ret = -EINVAL;
1610 goto err_priv;
1611 }
1612
1613 phy_pdev = of_find_device_by_node(phy_node);
1614 of_node_put(phy_node);
1615
1616 if (!phy_pdev) {
1617 dev_err(dev, "unable to obtain phy device\n");
1618 ret = -EINVAL;
1619 goto err_priv;
1620 }
1621
1622 phy_resnum = 0;
1623 phy_irqnum = 0;
1624 } else {
1625 /* In ACPI, the XGBE and PHY resources are the grouped
1626 * together with the PHY resources at the end
1627 */
1628 phy_pdev = priv->pdev;
1629 phy_resnum = amd_xgbe_phy_resource_count(phy_pdev,
1630 IORESOURCE_MEM) - 3;
1631 phy_irqnum = amd_xgbe_phy_resource_count(phy_pdev,
1632 IORESOURCE_IRQ) - 1;
1633 }
1634 phy_dev = &phy_pdev->dev;
1635
1636 /* Get the device mmio areas */
1637 priv->rxtx_res = platform_get_resource(phy_pdev, IORESOURCE_MEM,
1638 phy_resnum++);
1639 priv->rxtx_regs = devm_ioremap_resource(dev, priv->rxtx_res);
1640 if (IS_ERR(priv->rxtx_regs)) {
1641 dev_err(dev, "rxtx ioremap failed\n");
1642 ret = PTR_ERR(priv->rxtx_regs);
1643 goto err_put;
1644 }
1645
1646 priv->sir0_res = platform_get_resource(phy_pdev, IORESOURCE_MEM,
1647 phy_resnum++);
1648 priv->sir0_regs = devm_ioremap_resource(dev, priv->sir0_res);
1649 if (IS_ERR(priv->sir0_regs)) {
1650 dev_err(dev, "sir0 ioremap failed\n");
1651 ret = PTR_ERR(priv->sir0_regs);
1652 goto err_rxtx;
1653 }
1654
1655 priv->sir1_res = platform_get_resource(phy_pdev, IORESOURCE_MEM,
1656 phy_resnum++);
1657 priv->sir1_regs = devm_ioremap_resource(dev, priv->sir1_res);
1658 if (IS_ERR(priv->sir1_regs)) {
1659 dev_err(dev, "sir1 ioremap failed\n");
1660 ret = PTR_ERR(priv->sir1_regs);
1661 goto err_sir0;
1662 }
1663
1664 /* Get the auto-negotiation interrupt */
1665 ret = platform_get_irq(phy_pdev, phy_irqnum);
1666 if (ret < 0) {
1667 dev_err(dev, "platform_get_irq failed\n");
1668 goto err_sir1;
1669 }
1670 priv->an_irq = ret;
1671
1672 /* Get the device speed set property */
1673 ret = device_property_read_u32(phy_dev, XGBE_PHY_SPEEDSET_PROPERTY,
1674 &priv->speed_set);
1675 if (ret) {
1676 dev_err(dev, "invalid %s property\n",
1677 XGBE_PHY_SPEEDSET_PROPERTY);
1678 goto err_sir1;
1679 }
1680
1681 switch (priv->speed_set) {
1682 case AMD_XGBE_PHY_SPEEDSET_1000_10000:
1683 case AMD_XGBE_PHY_SPEEDSET_2500_10000:
1684 break;
1685 default:
1686 dev_err(dev, "invalid %s property\n",
1687 XGBE_PHY_SPEEDSET_PROPERTY);
1688 ret = -EINVAL;
1689 goto err_sir1;
1690 }
1691
1692 if (device_property_present(phy_dev, XGBE_PHY_BLWC_PROPERTY)) {
1693 ret = device_property_read_u32_array(phy_dev,
1694 XGBE_PHY_BLWC_PROPERTY,
1695 priv->serdes_blwc,
1696 XGBE_PHY_SPEEDS);
1697 if (ret) {
1698 dev_err(dev, "invalid %s property\n",
1699 XGBE_PHY_BLWC_PROPERTY);
1700 goto err_sir1;
1701 }
1702 } else {
1703 memcpy(priv->serdes_blwc, amd_xgbe_phy_serdes_blwc,
1704 sizeof(priv->serdes_blwc));
1705 }
1706
1707 if (device_property_present(phy_dev, XGBE_PHY_CDR_RATE_PROPERTY)) {
1708 ret = device_property_read_u32_array(phy_dev,
1709 XGBE_PHY_CDR_RATE_PROPERTY,
1710 priv->serdes_cdr_rate,
1711 XGBE_PHY_SPEEDS);
1712 if (ret) {
1713 dev_err(dev, "invalid %s property\n",
1714 XGBE_PHY_CDR_RATE_PROPERTY);
1715 goto err_sir1;
1716 }
1717 } else {
1718 memcpy(priv->serdes_cdr_rate, amd_xgbe_phy_serdes_cdr_rate,
1719 sizeof(priv->serdes_cdr_rate));
1720 }
1721
1722 if (device_property_present(phy_dev, XGBE_PHY_PQ_SKEW_PROPERTY)) {
1723 ret = device_property_read_u32_array(phy_dev,
1724 XGBE_PHY_PQ_SKEW_PROPERTY,
1725 priv->serdes_pq_skew,
1726 XGBE_PHY_SPEEDS);
1727 if (ret) {
1728 dev_err(dev, "invalid %s property\n",
1729 XGBE_PHY_PQ_SKEW_PROPERTY);
1730 goto err_sir1;
1731 }
1732 } else {
1733 memcpy(priv->serdes_pq_skew, amd_xgbe_phy_serdes_pq_skew,
1734 sizeof(priv->serdes_pq_skew));
1735 }
1736
1737 if (device_property_present(phy_dev, XGBE_PHY_TX_AMP_PROPERTY)) {
1738 ret = device_property_read_u32_array(phy_dev,
1739 XGBE_PHY_TX_AMP_PROPERTY,
1740 priv->serdes_tx_amp,
1741 XGBE_PHY_SPEEDS);
1742 if (ret) {
1743 dev_err(dev, "invalid %s property\n",
1744 XGBE_PHY_TX_AMP_PROPERTY);
1745 goto err_sir1;
1746 }
1747 } else {
1748 memcpy(priv->serdes_tx_amp, amd_xgbe_phy_serdes_tx_amp,
1749 sizeof(priv->serdes_tx_amp));
1750 }
1751
1752 if (device_property_present(phy_dev, XGBE_PHY_DFE_CFG_PROPERTY)) {
1753 ret = device_property_read_u32_array(phy_dev,
1754 XGBE_PHY_DFE_CFG_PROPERTY,
1755 priv->serdes_dfe_tap_cfg,
1756 XGBE_PHY_SPEEDS);
1757 if (ret) {
1758 dev_err(dev, "invalid %s property\n",
1759 XGBE_PHY_DFE_CFG_PROPERTY);
1760 goto err_sir1;
1761 }
1762 } else {
1763 memcpy(priv->serdes_dfe_tap_cfg,
1764 amd_xgbe_phy_serdes_dfe_tap_cfg,
1765 sizeof(priv->serdes_dfe_tap_cfg));
1766 }
1767
1768 if (device_property_present(phy_dev, XGBE_PHY_DFE_ENA_PROPERTY)) {
1769 ret = device_property_read_u32_array(phy_dev,
1770 XGBE_PHY_DFE_ENA_PROPERTY,
1771 priv->serdes_dfe_tap_ena,
1772 XGBE_PHY_SPEEDS);
1773 if (ret) {
1774 dev_err(dev, "invalid %s property\n",
1775 XGBE_PHY_DFE_ENA_PROPERTY);
1776 goto err_sir1;
1777 }
1778 } else {
1779 memcpy(priv->serdes_dfe_tap_ena,
1780 amd_xgbe_phy_serdes_dfe_tap_ena,
1781 sizeof(priv->serdes_dfe_tap_ena));
1782 }
1783
1784 /* Initialize supported features */
1785 phydev->supported = SUPPORTED_Autoneg;
1786 phydev->supported |= SUPPORTED_Pause | SUPPORTED_Asym_Pause;
1787 phydev->supported |= SUPPORTED_Backplane;
1788 phydev->supported |= SUPPORTED_10000baseKR_Full;
1789 switch (priv->speed_set) {
1790 case AMD_XGBE_PHY_SPEEDSET_1000_10000:
1791 phydev->supported |= SUPPORTED_1000baseKX_Full;
1792 break;
1793 case AMD_XGBE_PHY_SPEEDSET_2500_10000:
1794 phydev->supported |= SUPPORTED_2500baseX_Full;
1795 break;
1796 }
1797
1798 ret = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_PMA_10GBR_FEC_ABILITY);
1799 if (ret < 0)
1800 return ret;
1801 priv->fec_ability = ret & XGBE_PHY_FEC_MASK;
1802 if (priv->fec_ability & XGBE_PHY_FEC_ENABLE)
1803 phydev->supported |= SUPPORTED_10000baseR_FEC;
1804
1805 phydev->advertising = phydev->supported;
1806
1807 phydev->priv = priv;
1808
1809 if (!priv->adev || acpi_disabled)
1810 platform_device_put(phy_pdev);
1811
1812 return 0;
1813
1814 err_sir1:
1815 devm_iounmap(dev, priv->sir1_regs);
1816 devm_release_mem_region(dev, priv->sir1_res->start,
1817 resource_size(priv->sir1_res));
1818
1819 err_sir0:
1820 devm_iounmap(dev, priv->sir0_regs);
1821 devm_release_mem_region(dev, priv->sir0_res->start,
1822 resource_size(priv->sir0_res));
1823
1824 err_rxtx:
1825 devm_iounmap(dev, priv->rxtx_regs);
1826 devm_release_mem_region(dev, priv->rxtx_res->start,
1827 resource_size(priv->rxtx_res));
1828
1829 err_put:
1830 if (!priv->adev || acpi_disabled)
1831 platform_device_put(phy_pdev);
1832
1833 err_priv:
1834 devm_kfree(dev, priv);
1835
1836 return ret;
1837 }
1838
amd_xgbe_phy_remove(struct phy_device * phydev)1839 static void amd_xgbe_phy_remove(struct phy_device *phydev)
1840 {
1841 struct amd_xgbe_phy_priv *priv = phydev->priv;
1842 struct device *dev = priv->dev;
1843
1844 if (priv->an_irq_allocated) {
1845 devm_free_irq(dev, priv->an_irq, priv);
1846
1847 flush_workqueue(priv->an_workqueue);
1848 destroy_workqueue(priv->an_workqueue);
1849 }
1850
1851 /* Release resources */
1852 devm_iounmap(dev, priv->sir1_regs);
1853 devm_release_mem_region(dev, priv->sir1_res->start,
1854 resource_size(priv->sir1_res));
1855
1856 devm_iounmap(dev, priv->sir0_regs);
1857 devm_release_mem_region(dev, priv->sir0_res->start,
1858 resource_size(priv->sir0_res));
1859
1860 devm_iounmap(dev, priv->rxtx_regs);
1861 devm_release_mem_region(dev, priv->rxtx_res->start,
1862 resource_size(priv->rxtx_res));
1863
1864 devm_kfree(dev, priv);
1865 }
1866
amd_xgbe_match_phy_device(struct phy_device * phydev)1867 static int amd_xgbe_match_phy_device(struct phy_device *phydev)
1868 {
1869 return phydev->c45_ids.device_ids[MDIO_MMD_PCS] == XGBE_PHY_ID;
1870 }
1871
1872 static struct phy_driver amd_xgbe_phy_driver[] = {
1873 {
1874 .phy_id = XGBE_PHY_ID,
1875 .phy_id_mask = XGBE_PHY_MASK,
1876 .name = "AMD XGBE PHY",
1877 .features = 0,
1878 .flags = PHY_IS_INTERNAL,
1879 .probe = amd_xgbe_phy_probe,
1880 .remove = amd_xgbe_phy_remove,
1881 .soft_reset = amd_xgbe_phy_soft_reset,
1882 .config_init = amd_xgbe_phy_config_init,
1883 .suspend = amd_xgbe_phy_suspend,
1884 .resume = amd_xgbe_phy_resume,
1885 .config_aneg = amd_xgbe_phy_config_aneg,
1886 .aneg_done = amd_xgbe_phy_aneg_done,
1887 .read_status = amd_xgbe_phy_read_status,
1888 .match_phy_device = amd_xgbe_match_phy_device,
1889 .driver = {
1890 .owner = THIS_MODULE,
1891 },
1892 },
1893 };
1894
1895 module_phy_driver(amd_xgbe_phy_driver);
1896
1897 static struct mdio_device_id __maybe_unused amd_xgbe_phy_ids[] = {
1898 { XGBE_PHY_ID, XGBE_PHY_MASK },
1899 { }
1900 };
1901 MODULE_DEVICE_TABLE(mdio, amd_xgbe_phy_ids);
1902