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[mirror_ubuntu-bionic-kernel.git] / drivers / net / phy / micrel.c
1 /*
2 * drivers/net/phy/micrel.c
3 *
4 * Driver for Micrel PHYs
5 *
6 * Author: David J. Choi
7 *
8 * Copyright (c) 2010-2013 Micrel, Inc.
9 * Copyright (c) 2014 Johan Hovold <johan@kernel.org>
10 *
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License as published by the
13 * Free Software Foundation; either version 2 of the License, or (at your
14 * option) any later version.
15 *
16 * Support : Micrel Phys:
17 * Giga phys: ksz9021, ksz9031
18 * 100/10 Phys : ksz8001, ksz8721, ksz8737, ksz8041
19 * ksz8021, ksz8031, ksz8051,
20 * ksz8081, ksz8091,
21 * ksz8061,
22 * Switch : ksz8873, ksz886x
23 */
24
25 #include <linux/kernel.h>
26 #include <linux/module.h>
27 #include <linux/phy.h>
28 #include <linux/micrel_phy.h>
29 #include <linux/of.h>
30 #include <linux/clk.h>
31
32 /* Operation Mode Strap Override */
33 #define MII_KSZPHY_OMSO 0x16
34 #define KSZPHY_OMSO_B_CAST_OFF BIT(9)
35 #define KSZPHY_OMSO_NAND_TREE_ON BIT(5)
36 #define KSZPHY_OMSO_RMII_OVERRIDE BIT(1)
37 #define KSZPHY_OMSO_MII_OVERRIDE BIT(0)
38
39 /* general Interrupt control/status reg in vendor specific block. */
40 #define MII_KSZPHY_INTCS 0x1B
41 #define KSZPHY_INTCS_JABBER BIT(15)
42 #define KSZPHY_INTCS_RECEIVE_ERR BIT(14)
43 #define KSZPHY_INTCS_PAGE_RECEIVE BIT(13)
44 #define KSZPHY_INTCS_PARELLEL BIT(12)
45 #define KSZPHY_INTCS_LINK_PARTNER_ACK BIT(11)
46 #define KSZPHY_INTCS_LINK_DOWN BIT(10)
47 #define KSZPHY_INTCS_REMOTE_FAULT BIT(9)
48 #define KSZPHY_INTCS_LINK_UP BIT(8)
49 #define KSZPHY_INTCS_ALL (KSZPHY_INTCS_LINK_UP |\
50 KSZPHY_INTCS_LINK_DOWN)
51
52 /* PHY Control 1 */
53 #define MII_KSZPHY_CTRL_1 0x1e
54
55 /* PHY Control 2 / PHY Control (if no PHY Control 1) */
56 #define MII_KSZPHY_CTRL_2 0x1f
57 #define MII_KSZPHY_CTRL MII_KSZPHY_CTRL_2
58 /* bitmap of PHY register to set interrupt mode */
59 #define KSZPHY_CTRL_INT_ACTIVE_HIGH BIT(9)
60 #define KSZPHY_RMII_REF_CLK_SEL BIT(7)
61
62 /* Write/read to/from extended registers */
63 #define MII_KSZPHY_EXTREG 0x0b
64 #define KSZPHY_EXTREG_WRITE 0x8000
65
66 #define MII_KSZPHY_EXTREG_WRITE 0x0c
67 #define MII_KSZPHY_EXTREG_READ 0x0d
68
69 /* Extended registers */
70 #define MII_KSZPHY_CLK_CONTROL_PAD_SKEW 0x104
71 #define MII_KSZPHY_RX_DATA_PAD_SKEW 0x105
72 #define MII_KSZPHY_TX_DATA_PAD_SKEW 0x106
73
74 #define PS_TO_REG 200
75
76 struct kszphy_hw_stat {
77 const char *string;
78 u8 reg;
79 u8 bits;
80 };
81
82 static struct kszphy_hw_stat kszphy_hw_stats[] = {
83 { "phy_receive_errors", 21, 16},
84 { "phy_idle_errors", 10, 8 },
85 };
86
87 struct kszphy_type {
88 u32 led_mode_reg;
89 u16 interrupt_level_mask;
90 bool has_broadcast_disable;
91 bool has_nand_tree_disable;
92 bool has_rmii_ref_clk_sel;
93 };
94
95 struct kszphy_priv {
96 const struct kszphy_type *type;
97 int led_mode;
98 bool rmii_ref_clk_sel;
99 bool rmii_ref_clk_sel_val;
100 u64 stats[ARRAY_SIZE(kszphy_hw_stats)];
101 };
102
103 static const struct kszphy_type ksz8021_type = {
104 .led_mode_reg = MII_KSZPHY_CTRL_2,
105 .has_broadcast_disable = true,
106 .has_nand_tree_disable = true,
107 .has_rmii_ref_clk_sel = true,
108 };
109
110 static const struct kszphy_type ksz8041_type = {
111 .led_mode_reg = MII_KSZPHY_CTRL_1,
112 };
113
114 static const struct kszphy_type ksz8051_type = {
115 .led_mode_reg = MII_KSZPHY_CTRL_2,
116 .has_nand_tree_disable = true,
117 };
118
119 static const struct kszphy_type ksz8081_type = {
120 .led_mode_reg = MII_KSZPHY_CTRL_2,
121 .has_broadcast_disable = true,
122 .has_nand_tree_disable = true,
123 .has_rmii_ref_clk_sel = true,
124 };
125
126 static const struct kszphy_type ks8737_type = {
127 .interrupt_level_mask = BIT(14),
128 };
129
130 static const struct kszphy_type ksz9021_type = {
131 .interrupt_level_mask = BIT(14),
132 };
133
134 static int kszphy_extended_write(struct phy_device *phydev,
135 u32 regnum, u16 val)
136 {
137 phy_write(phydev, MII_KSZPHY_EXTREG, KSZPHY_EXTREG_WRITE | regnum);
138 return phy_write(phydev, MII_KSZPHY_EXTREG_WRITE, val);
139 }
140
141 static int kszphy_extended_read(struct phy_device *phydev,
142 u32 regnum)
143 {
144 phy_write(phydev, MII_KSZPHY_EXTREG, regnum);
145 return phy_read(phydev, MII_KSZPHY_EXTREG_READ);
146 }
147
148 static int kszphy_ack_interrupt(struct phy_device *phydev)
149 {
150 /* bit[7..0] int status, which is a read and clear register. */
151 int rc;
152
153 rc = phy_read(phydev, MII_KSZPHY_INTCS);
154
155 return (rc < 0) ? rc : 0;
156 }
157
158 static int kszphy_config_intr(struct phy_device *phydev)
159 {
160 const struct kszphy_type *type = phydev->drv->driver_data;
161 int temp;
162 u16 mask;
163
164 if (type && type->interrupt_level_mask)
165 mask = type->interrupt_level_mask;
166 else
167 mask = KSZPHY_CTRL_INT_ACTIVE_HIGH;
168
169 /* set the interrupt pin active low */
170 temp = phy_read(phydev, MII_KSZPHY_CTRL);
171 if (temp < 0)
172 return temp;
173 temp &= ~mask;
174 phy_write(phydev, MII_KSZPHY_CTRL, temp);
175
176 /* enable / disable interrupts */
177 if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
178 temp = KSZPHY_INTCS_ALL;
179 else
180 temp = 0;
181
182 return phy_write(phydev, MII_KSZPHY_INTCS, temp);
183 }
184
185 static int kszphy_rmii_clk_sel(struct phy_device *phydev, bool val)
186 {
187 int ctrl;
188
189 ctrl = phy_read(phydev, MII_KSZPHY_CTRL);
190 if (ctrl < 0)
191 return ctrl;
192
193 if (val)
194 ctrl |= KSZPHY_RMII_REF_CLK_SEL;
195 else
196 ctrl &= ~KSZPHY_RMII_REF_CLK_SEL;
197
198 return phy_write(phydev, MII_KSZPHY_CTRL, ctrl);
199 }
200
201 static int kszphy_setup_led(struct phy_device *phydev, u32 reg, int val)
202 {
203 int rc, temp, shift;
204
205 switch (reg) {
206 case MII_KSZPHY_CTRL_1:
207 shift = 14;
208 break;
209 case MII_KSZPHY_CTRL_2:
210 shift = 4;
211 break;
212 default:
213 return -EINVAL;
214 }
215
216 temp = phy_read(phydev, reg);
217 if (temp < 0) {
218 rc = temp;
219 goto out;
220 }
221
222 temp &= ~(3 << shift);
223 temp |= val << shift;
224 rc = phy_write(phydev, reg, temp);
225 out:
226 if (rc < 0)
227 phydev_err(phydev, "failed to set led mode\n");
228
229 return rc;
230 }
231
232 /* Disable PHY address 0 as the broadcast address, so that it can be used as a
233 * unique (non-broadcast) address on a shared bus.
234 */
235 static int kszphy_broadcast_disable(struct phy_device *phydev)
236 {
237 int ret;
238
239 ret = phy_read(phydev, MII_KSZPHY_OMSO);
240 if (ret < 0)
241 goto out;
242
243 ret = phy_write(phydev, MII_KSZPHY_OMSO, ret | KSZPHY_OMSO_B_CAST_OFF);
244 out:
245 if (ret)
246 phydev_err(phydev, "failed to disable broadcast address\n");
247
248 return ret;
249 }
250
251 static int kszphy_nand_tree_disable(struct phy_device *phydev)
252 {
253 int ret;
254
255 ret = phy_read(phydev, MII_KSZPHY_OMSO);
256 if (ret < 0)
257 goto out;
258
259 if (!(ret & KSZPHY_OMSO_NAND_TREE_ON))
260 return 0;
261
262 ret = phy_write(phydev, MII_KSZPHY_OMSO,
263 ret & ~KSZPHY_OMSO_NAND_TREE_ON);
264 out:
265 if (ret)
266 phydev_err(phydev, "failed to disable NAND tree mode\n");
267
268 return ret;
269 }
270
271 static int kszphy_config_init(struct phy_device *phydev)
272 {
273 struct kszphy_priv *priv = phydev->priv;
274 const struct kszphy_type *type;
275 int ret;
276
277 if (!priv)
278 return 0;
279
280 type = priv->type;
281
282 if (type->has_broadcast_disable)
283 kszphy_broadcast_disable(phydev);
284
285 if (type->has_nand_tree_disable)
286 kszphy_nand_tree_disable(phydev);
287
288 if (priv->rmii_ref_clk_sel) {
289 ret = kszphy_rmii_clk_sel(phydev, priv->rmii_ref_clk_sel_val);
290 if (ret) {
291 phydev_err(phydev,
292 "failed to set rmii reference clock\n");
293 return ret;
294 }
295 }
296
297 if (priv->led_mode >= 0)
298 kszphy_setup_led(phydev, type->led_mode_reg, priv->led_mode);
299
300 if (phy_interrupt_is_valid(phydev)) {
301 int ctl = phy_read(phydev, MII_BMCR);
302
303 if (ctl < 0)
304 return ctl;
305
306 ret = phy_write(phydev, MII_BMCR, ctl & ~BMCR_ANENABLE);
307 if (ret < 0)
308 return ret;
309 }
310
311 return 0;
312 }
313
314 static int ksz8041_config_init(struct phy_device *phydev)
315 {
316 struct device_node *of_node = phydev->mdio.dev.of_node;
317
318 /* Limit supported and advertised modes in fiber mode */
319 if (of_property_read_bool(of_node, "micrel,fiber-mode")) {
320 phydev->dev_flags |= MICREL_PHY_FXEN;
321 phydev->supported &= SUPPORTED_100baseT_Full |
322 SUPPORTED_100baseT_Half;
323 phydev->supported |= SUPPORTED_FIBRE;
324 phydev->advertising &= ADVERTISED_100baseT_Full |
325 ADVERTISED_100baseT_Half;
326 phydev->advertising |= ADVERTISED_FIBRE;
327 phydev->autoneg = AUTONEG_DISABLE;
328 }
329
330 return kszphy_config_init(phydev);
331 }
332
333 static int ksz8041_config_aneg(struct phy_device *phydev)
334 {
335 /* Skip auto-negotiation in fiber mode */
336 if (phydev->dev_flags & MICREL_PHY_FXEN) {
337 phydev->speed = SPEED_100;
338 return 0;
339 }
340
341 return genphy_config_aneg(phydev);
342 }
343
344 static int ksz9021_load_values_from_of(struct phy_device *phydev,
345 const struct device_node *of_node,
346 u16 reg,
347 const char *field1, const char *field2,
348 const char *field3, const char *field4)
349 {
350 int val1 = -1;
351 int val2 = -2;
352 int val3 = -3;
353 int val4 = -4;
354 int newval;
355 int matches = 0;
356
357 if (!of_property_read_u32(of_node, field1, &val1))
358 matches++;
359
360 if (!of_property_read_u32(of_node, field2, &val2))
361 matches++;
362
363 if (!of_property_read_u32(of_node, field3, &val3))
364 matches++;
365
366 if (!of_property_read_u32(of_node, field4, &val4))
367 matches++;
368
369 if (!matches)
370 return 0;
371
372 if (matches < 4)
373 newval = kszphy_extended_read(phydev, reg);
374 else
375 newval = 0;
376
377 if (val1 != -1)
378 newval = ((newval & 0xfff0) | ((val1 / PS_TO_REG) & 0xf) << 0);
379
380 if (val2 != -2)
381 newval = ((newval & 0xff0f) | ((val2 / PS_TO_REG) & 0xf) << 4);
382
383 if (val3 != -3)
384 newval = ((newval & 0xf0ff) | ((val3 / PS_TO_REG) & 0xf) << 8);
385
386 if (val4 != -4)
387 newval = ((newval & 0x0fff) | ((val4 / PS_TO_REG) & 0xf) << 12);
388
389 return kszphy_extended_write(phydev, reg, newval);
390 }
391
392 static int ksz9021_config_init(struct phy_device *phydev)
393 {
394 const struct device *dev = &phydev->mdio.dev;
395 const struct device_node *of_node = dev->of_node;
396 const struct device *dev_walker;
397
398 /* The Micrel driver has a deprecated option to place phy OF
399 * properties in the MAC node. Walk up the tree of devices to
400 * find a device with an OF node.
401 */
402 dev_walker = &phydev->mdio.dev;
403 do {
404 of_node = dev_walker->of_node;
405 dev_walker = dev_walker->parent;
406
407 } while (!of_node && dev_walker);
408
409 if (of_node) {
410 ksz9021_load_values_from_of(phydev, of_node,
411 MII_KSZPHY_CLK_CONTROL_PAD_SKEW,
412 "txen-skew-ps", "txc-skew-ps",
413 "rxdv-skew-ps", "rxc-skew-ps");
414 ksz9021_load_values_from_of(phydev, of_node,
415 MII_KSZPHY_RX_DATA_PAD_SKEW,
416 "rxd0-skew-ps", "rxd1-skew-ps",
417 "rxd2-skew-ps", "rxd3-skew-ps");
418 ksz9021_load_values_from_of(phydev, of_node,
419 MII_KSZPHY_TX_DATA_PAD_SKEW,
420 "txd0-skew-ps", "txd1-skew-ps",
421 "txd2-skew-ps", "txd3-skew-ps");
422 }
423 return 0;
424 }
425
426 #define MII_KSZ9031RN_MMD_CTRL_REG 0x0d
427 #define MII_KSZ9031RN_MMD_REGDATA_REG 0x0e
428 #define OP_DATA 1
429 #define KSZ9031_PS_TO_REG 60
430
431 /* Extended registers */
432 /* MMD Address 0x0 */
433 #define MII_KSZ9031RN_FLP_BURST_TX_LO 3
434 #define MII_KSZ9031RN_FLP_BURST_TX_HI 4
435
436 /* MMD Address 0x2 */
437 #define MII_KSZ9031RN_CONTROL_PAD_SKEW 4
438 #define MII_KSZ9031RN_RX_DATA_PAD_SKEW 5
439 #define MII_KSZ9031RN_TX_DATA_PAD_SKEW 6
440 #define MII_KSZ9031RN_CLK_PAD_SKEW 8
441
442 /* MMD Address 0x1C */
443 #define MII_KSZ9031RN_EDPD 0x23
444 #define MII_KSZ9031RN_EDPD_ENABLE BIT(0)
445
446 static int ksz9031_extended_write(struct phy_device *phydev,
447 u8 mode, u32 dev_addr, u32 regnum, u16 val)
448 {
449 phy_write(phydev, MII_KSZ9031RN_MMD_CTRL_REG, dev_addr);
450 phy_write(phydev, MII_KSZ9031RN_MMD_REGDATA_REG, regnum);
451 phy_write(phydev, MII_KSZ9031RN_MMD_CTRL_REG, (mode << 14) | dev_addr);
452 return phy_write(phydev, MII_KSZ9031RN_MMD_REGDATA_REG, val);
453 }
454
455 static int ksz9031_extended_read(struct phy_device *phydev,
456 u8 mode, u32 dev_addr, u32 regnum)
457 {
458 phy_write(phydev, MII_KSZ9031RN_MMD_CTRL_REG, dev_addr);
459 phy_write(phydev, MII_KSZ9031RN_MMD_REGDATA_REG, regnum);
460 phy_write(phydev, MII_KSZ9031RN_MMD_CTRL_REG, (mode << 14) | dev_addr);
461 return phy_read(phydev, MII_KSZ9031RN_MMD_REGDATA_REG);
462 }
463
464 static int ksz9031_of_load_skew_values(struct phy_device *phydev,
465 const struct device_node *of_node,
466 u16 reg, size_t field_sz,
467 const char *field[], u8 numfields)
468 {
469 int val[4] = {-1, -2, -3, -4};
470 int matches = 0;
471 u16 mask;
472 u16 maxval;
473 u16 newval;
474 int i;
475
476 for (i = 0; i < numfields; i++)
477 if (!of_property_read_u32(of_node, field[i], val + i))
478 matches++;
479
480 if (!matches)
481 return 0;
482
483 if (matches < numfields)
484 newval = ksz9031_extended_read(phydev, OP_DATA, 2, reg);
485 else
486 newval = 0;
487
488 maxval = (field_sz == 4) ? 0xf : 0x1f;
489 for (i = 0; i < numfields; i++)
490 if (val[i] != -(i + 1)) {
491 mask = 0xffff;
492 mask ^= maxval << (field_sz * i);
493 newval = (newval & mask) |
494 (((val[i] / KSZ9031_PS_TO_REG) & maxval)
495 << (field_sz * i));
496 }
497
498 return ksz9031_extended_write(phydev, OP_DATA, 2, reg, newval);
499 }
500
501 static int ksz9031_center_flp_timing(struct phy_device *phydev)
502 {
503 int result;
504
505 /* Center KSZ9031RNX FLP timing at 16ms. */
506 result = ksz9031_extended_write(phydev, OP_DATA, 0,
507 MII_KSZ9031RN_FLP_BURST_TX_HI, 0x0006);
508 result = ksz9031_extended_write(phydev, OP_DATA, 0,
509 MII_KSZ9031RN_FLP_BURST_TX_LO, 0x1A80);
510
511 if (result)
512 return result;
513
514 return genphy_restart_aneg(phydev);
515 }
516
517 /* Enable energy-detect power-down mode */
518 static int ksz9031_enable_edpd(struct phy_device *phydev)
519 {
520 int reg;
521
522 reg = ksz9031_extended_read(phydev, OP_DATA, 0x1C, MII_KSZ9031RN_EDPD);
523 if (reg < 0)
524 return reg;
525 return ksz9031_extended_write(phydev, OP_DATA, 0x1C, MII_KSZ9031RN_EDPD,
526 reg | MII_KSZ9031RN_EDPD_ENABLE);
527 }
528
529 static int ksz9031_config_init(struct phy_device *phydev)
530 {
531 const struct device *dev = &phydev->mdio.dev;
532 const struct device_node *of_node = dev->of_node;
533 static const char *clk_skews[2] = {"rxc-skew-ps", "txc-skew-ps"};
534 static const char *rx_data_skews[4] = {
535 "rxd0-skew-ps", "rxd1-skew-ps",
536 "rxd2-skew-ps", "rxd3-skew-ps"
537 };
538 static const char *tx_data_skews[4] = {
539 "txd0-skew-ps", "txd1-skew-ps",
540 "txd2-skew-ps", "txd3-skew-ps"
541 };
542 static const char *control_skews[2] = {"txen-skew-ps", "rxdv-skew-ps"};
543 const struct device *dev_walker;
544 int result;
545
546 result = ksz9031_enable_edpd(phydev);
547 if (result < 0)
548 return result;
549
550 /* The Micrel driver has a deprecated option to place phy OF
551 * properties in the MAC node. Walk up the tree of devices to
552 * find a device with an OF node.
553 */
554 dev_walker = &phydev->mdio.dev;
555 do {
556 of_node = dev_walker->of_node;
557 dev_walker = dev_walker->parent;
558 } while (!of_node && dev_walker);
559
560 if (of_node) {
561 ksz9031_of_load_skew_values(phydev, of_node,
562 MII_KSZ9031RN_CLK_PAD_SKEW, 5,
563 clk_skews, 2);
564
565 ksz9031_of_load_skew_values(phydev, of_node,
566 MII_KSZ9031RN_CONTROL_PAD_SKEW, 4,
567 control_skews, 2);
568
569 ksz9031_of_load_skew_values(phydev, of_node,
570 MII_KSZ9031RN_RX_DATA_PAD_SKEW, 4,
571 rx_data_skews, 4);
572
573 ksz9031_of_load_skew_values(phydev, of_node,
574 MII_KSZ9031RN_TX_DATA_PAD_SKEW, 4,
575 tx_data_skews, 4);
576 }
577
578 return ksz9031_center_flp_timing(phydev);
579 }
580
581 #define KSZ8873MLL_GLOBAL_CONTROL_4 0x06
582 #define KSZ8873MLL_GLOBAL_CONTROL_4_DUPLEX BIT(6)
583 #define KSZ8873MLL_GLOBAL_CONTROL_4_SPEED BIT(4)
584 static int ksz8873mll_read_status(struct phy_device *phydev)
585 {
586 int regval;
587
588 /* dummy read */
589 regval = phy_read(phydev, KSZ8873MLL_GLOBAL_CONTROL_4);
590
591 regval = phy_read(phydev, KSZ8873MLL_GLOBAL_CONTROL_4);
592
593 if (regval & KSZ8873MLL_GLOBAL_CONTROL_4_DUPLEX)
594 phydev->duplex = DUPLEX_HALF;
595 else
596 phydev->duplex = DUPLEX_FULL;
597
598 if (regval & KSZ8873MLL_GLOBAL_CONTROL_4_SPEED)
599 phydev->speed = SPEED_10;
600 else
601 phydev->speed = SPEED_100;
602
603 phydev->link = 1;
604 phydev->pause = phydev->asym_pause = 0;
605
606 return 0;
607 }
608
609 static int ksz9031_read_status(struct phy_device *phydev)
610 {
611 int err;
612 int regval;
613
614 err = genphy_read_status(phydev);
615 if (err)
616 return err;
617
618 /* Make sure the PHY is not broken. Read idle error count,
619 * and reset the PHY if it is maxed out.
620 */
621 regval = phy_read(phydev, MII_STAT1000);
622 if ((regval & 0xFF) == 0xFF) {
623 phy_init_hw(phydev);
624 phydev->link = 0;
625 }
626
627 return 0;
628 }
629
630 static int ksz8873mll_config_aneg(struct phy_device *phydev)
631 {
632 return 0;
633 }
634
635 /* This routine returns -1 as an indication to the caller that the
636 * Micrel ksz9021 10/100/1000 PHY does not support standard IEEE
637 * MMD extended PHY registers.
638 */
639 static int
640 ksz9021_rd_mmd_phyreg(struct phy_device *phydev, int ptrad, int devnum,
641 int regnum)
642 {
643 return -1;
644 }
645
646 /* This routine does nothing since the Micrel ksz9021 does not support
647 * standard IEEE MMD extended PHY registers.
648 */
649 static void
650 ksz9021_wr_mmd_phyreg(struct phy_device *phydev, int ptrad, int devnum,
651 int regnum, u32 val)
652 {
653 }
654
655 static int kszphy_get_sset_count(struct phy_device *phydev)
656 {
657 return ARRAY_SIZE(kszphy_hw_stats);
658 }
659
660 static void kszphy_get_strings(struct phy_device *phydev, u8 *data)
661 {
662 int i;
663
664 for (i = 0; i < ARRAY_SIZE(kszphy_hw_stats); i++) {
665 memcpy(data + i * ETH_GSTRING_LEN,
666 kszphy_hw_stats[i].string, ETH_GSTRING_LEN);
667 }
668 }
669
670 #ifndef UINT64_MAX
671 #define UINT64_MAX (u64)(~((u64)0))
672 #endif
673 static u64 kszphy_get_stat(struct phy_device *phydev, int i)
674 {
675 struct kszphy_hw_stat stat = kszphy_hw_stats[i];
676 struct kszphy_priv *priv = phydev->priv;
677 int val;
678 u64 ret;
679
680 val = phy_read(phydev, stat.reg);
681 if (val < 0) {
682 ret = UINT64_MAX;
683 } else {
684 val = val & ((1 << stat.bits) - 1);
685 priv->stats[i] += val;
686 ret = priv->stats[i];
687 }
688
689 return ret;
690 }
691
692 static void kszphy_get_stats(struct phy_device *phydev,
693 struct ethtool_stats *stats, u64 *data)
694 {
695 int i;
696
697 for (i = 0; i < ARRAY_SIZE(kszphy_hw_stats); i++)
698 data[i] = kszphy_get_stat(phydev, i);
699 }
700
701 static int kszphy_suspend(struct phy_device *phydev)
702 {
703 /* Disable PHY Interrupts */
704 if (phy_interrupt_is_valid(phydev)) {
705 phydev->interrupts = PHY_INTERRUPT_DISABLED;
706 if (phydev->drv->config_intr)
707 phydev->drv->config_intr(phydev);
708 }
709
710 return genphy_suspend(phydev);
711 }
712
713 static int kszphy_resume(struct phy_device *phydev)
714 {
715 genphy_resume(phydev);
716
717 /* Enable PHY Interrupts */
718 if (phy_interrupt_is_valid(phydev)) {
719 phydev->interrupts = PHY_INTERRUPT_ENABLED;
720 if (phydev->drv->config_intr)
721 phydev->drv->config_intr(phydev);
722 }
723
724 return 0;
725 }
726
727 static int kszphy_probe(struct phy_device *phydev)
728 {
729 const struct kszphy_type *type = phydev->drv->driver_data;
730 const struct device_node *np = phydev->mdio.dev.of_node;
731 struct kszphy_priv *priv;
732 struct clk *clk;
733 int ret;
734
735 priv = devm_kzalloc(&phydev->mdio.dev, sizeof(*priv), GFP_KERNEL);
736 if (!priv)
737 return -ENOMEM;
738
739 phydev->priv = priv;
740
741 priv->type = type;
742
743 if (type->led_mode_reg) {
744 ret = of_property_read_u32(np, "micrel,led-mode",
745 &priv->led_mode);
746 if (ret)
747 priv->led_mode = -1;
748
749 if (priv->led_mode > 3) {
750 phydev_err(phydev, "invalid led mode: 0x%02x\n",
751 priv->led_mode);
752 priv->led_mode = -1;
753 }
754 } else {
755 priv->led_mode = -1;
756 }
757
758 clk = devm_clk_get(&phydev->mdio.dev, "rmii-ref");
759 /* NOTE: clk may be NULL if building without CONFIG_HAVE_CLK */
760 if (!IS_ERR_OR_NULL(clk)) {
761 unsigned long rate = clk_get_rate(clk);
762 bool rmii_ref_clk_sel_25_mhz;
763
764 priv->rmii_ref_clk_sel = type->has_rmii_ref_clk_sel;
765 rmii_ref_clk_sel_25_mhz = of_property_read_bool(np,
766 "micrel,rmii-reference-clock-select-25-mhz");
767
768 if (rate > 24500000 && rate < 25500000) {
769 priv->rmii_ref_clk_sel_val = rmii_ref_clk_sel_25_mhz;
770 } else if (rate > 49500000 && rate < 50500000) {
771 priv->rmii_ref_clk_sel_val = !rmii_ref_clk_sel_25_mhz;
772 } else {
773 phydev_err(phydev, "Clock rate out of range: %ld\n",
774 rate);
775 return -EINVAL;
776 }
777 }
778
779 /* Support legacy board-file configuration */
780 if (phydev->dev_flags & MICREL_PHY_50MHZ_CLK) {
781 priv->rmii_ref_clk_sel = true;
782 priv->rmii_ref_clk_sel_val = true;
783 }
784
785 return 0;
786 }
787
788 static struct phy_driver ksphy_driver[] = {
789 {
790 .phy_id = PHY_ID_KS8737,
791 .phy_id_mask = MICREL_PHY_ID_MASK,
792 .name = "Micrel KS8737",
793 .features = PHY_BASIC_FEATURES,
794 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
795 .driver_data = &ks8737_type,
796 .config_init = kszphy_config_init,
797 .config_aneg = genphy_config_aneg,
798 .read_status = genphy_read_status,
799 .ack_interrupt = kszphy_ack_interrupt,
800 .config_intr = kszphy_config_intr,
801 .get_sset_count = kszphy_get_sset_count,
802 .get_strings = kszphy_get_strings,
803 .get_stats = kszphy_get_stats,
804 .suspend = genphy_suspend,
805 .resume = genphy_resume,
806 }, {
807 .phy_id = PHY_ID_KSZ8021,
808 .phy_id_mask = 0x00ffffff,
809 .name = "Micrel KSZ8021 or KSZ8031",
810 .features = PHY_BASIC_FEATURES,
811 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
812 .driver_data = &ksz8021_type,
813 .probe = kszphy_probe,
814 .config_init = kszphy_config_init,
815 .config_aneg = genphy_config_aneg,
816 .read_status = genphy_read_status,
817 .ack_interrupt = kszphy_ack_interrupt,
818 .config_intr = kszphy_config_intr,
819 .get_sset_count = kszphy_get_sset_count,
820 .get_strings = kszphy_get_strings,
821 .get_stats = kszphy_get_stats,
822 .suspend = genphy_suspend,
823 .resume = genphy_resume,
824 }, {
825 .phy_id = PHY_ID_KSZ8031,
826 .phy_id_mask = 0x00ffffff,
827 .name = "Micrel KSZ8031",
828 .features = PHY_BASIC_FEATURES,
829 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
830 .driver_data = &ksz8021_type,
831 .probe = kszphy_probe,
832 .config_init = kszphy_config_init,
833 .config_aneg = genphy_config_aneg,
834 .read_status = genphy_read_status,
835 .ack_interrupt = kszphy_ack_interrupt,
836 .config_intr = kszphy_config_intr,
837 .get_sset_count = kszphy_get_sset_count,
838 .get_strings = kszphy_get_strings,
839 .get_stats = kszphy_get_stats,
840 .suspend = genphy_suspend,
841 .resume = genphy_resume,
842 }, {
843 .phy_id = PHY_ID_KSZ8041,
844 .phy_id_mask = MICREL_PHY_ID_MASK,
845 .name = "Micrel KSZ8041",
846 .features = PHY_BASIC_FEATURES,
847 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
848 .driver_data = &ksz8041_type,
849 .probe = kszphy_probe,
850 .config_init = ksz8041_config_init,
851 .config_aneg = ksz8041_config_aneg,
852 .read_status = genphy_read_status,
853 .ack_interrupt = kszphy_ack_interrupt,
854 .config_intr = kszphy_config_intr,
855 .get_sset_count = kszphy_get_sset_count,
856 .get_strings = kszphy_get_strings,
857 .get_stats = kszphy_get_stats,
858 .suspend = genphy_suspend,
859 .resume = genphy_resume,
860 }, {
861 .phy_id = PHY_ID_KSZ8041RNLI,
862 .phy_id_mask = MICREL_PHY_ID_MASK,
863 .name = "Micrel KSZ8041RNLI",
864 .features = PHY_BASIC_FEATURES,
865 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
866 .driver_data = &ksz8041_type,
867 .probe = kszphy_probe,
868 .config_init = kszphy_config_init,
869 .config_aneg = genphy_config_aneg,
870 .read_status = genphy_read_status,
871 .ack_interrupt = kszphy_ack_interrupt,
872 .config_intr = kszphy_config_intr,
873 .get_sset_count = kszphy_get_sset_count,
874 .get_strings = kszphy_get_strings,
875 .get_stats = kszphy_get_stats,
876 .suspend = genphy_suspend,
877 .resume = genphy_resume,
878 }, {
879 .phy_id = PHY_ID_KSZ8051,
880 .phy_id_mask = MICREL_PHY_ID_MASK,
881 .name = "Micrel KSZ8051",
882 .features = PHY_BASIC_FEATURES,
883 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
884 .driver_data = &ksz8051_type,
885 .probe = kszphy_probe,
886 .config_init = kszphy_config_init,
887 .config_aneg = genphy_config_aneg,
888 .read_status = genphy_read_status,
889 .ack_interrupt = kszphy_ack_interrupt,
890 .config_intr = kszphy_config_intr,
891 .get_sset_count = kszphy_get_sset_count,
892 .get_strings = kszphy_get_strings,
893 .get_stats = kszphy_get_stats,
894 .suspend = genphy_suspend,
895 .resume = genphy_resume,
896 }, {
897 .phy_id = PHY_ID_KSZ8001,
898 .name = "Micrel KSZ8001 or KS8721",
899 .phy_id_mask = 0x00fffffc,
900 .features = PHY_BASIC_FEATURES,
901 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
902 .driver_data = &ksz8041_type,
903 .probe = kszphy_probe,
904 .config_init = kszphy_config_init,
905 .config_aneg = genphy_config_aneg,
906 .read_status = genphy_read_status,
907 .ack_interrupt = kszphy_ack_interrupt,
908 .config_intr = kszphy_config_intr,
909 .get_sset_count = kszphy_get_sset_count,
910 .get_strings = kszphy_get_strings,
911 .get_stats = kszphy_get_stats,
912 .suspend = genphy_suspend,
913 .resume = genphy_resume,
914 }, {
915 .phy_id = PHY_ID_KSZ8081,
916 .name = "Micrel KSZ8081 or KSZ8091",
917 .phy_id_mask = MICREL_PHY_ID_MASK,
918 .features = PHY_BASIC_FEATURES,
919 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
920 .driver_data = &ksz8081_type,
921 .probe = kszphy_probe,
922 .config_init = kszphy_config_init,
923 .config_aneg = genphy_config_aneg,
924 .read_status = genphy_read_status,
925 .ack_interrupt = kszphy_ack_interrupt,
926 .config_intr = kszphy_config_intr,
927 .get_sset_count = kszphy_get_sset_count,
928 .get_strings = kszphy_get_strings,
929 .get_stats = kszphy_get_stats,
930 .suspend = kszphy_suspend,
931 .resume = kszphy_resume,
932 }, {
933 .phy_id = PHY_ID_KSZ8061,
934 .name = "Micrel KSZ8061",
935 .phy_id_mask = MICREL_PHY_ID_MASK,
936 .features = PHY_BASIC_FEATURES,
937 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
938 .config_init = kszphy_config_init,
939 .config_aneg = genphy_config_aneg,
940 .read_status = genphy_read_status,
941 .ack_interrupt = kszphy_ack_interrupt,
942 .config_intr = kszphy_config_intr,
943 .get_sset_count = kszphy_get_sset_count,
944 .get_strings = kszphy_get_strings,
945 .get_stats = kszphy_get_stats,
946 .suspend = genphy_suspend,
947 .resume = genphy_resume,
948 }, {
949 .phy_id = PHY_ID_KSZ9021,
950 .phy_id_mask = 0x000ffffe,
951 .name = "Micrel KSZ9021 Gigabit PHY",
952 .features = PHY_GBIT_FEATURES,
953 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
954 .driver_data = &ksz9021_type,
955 .config_init = ksz9021_config_init,
956 .config_aneg = genphy_config_aneg,
957 .read_status = genphy_read_status,
958 .ack_interrupt = kszphy_ack_interrupt,
959 .config_intr = kszphy_config_intr,
960 .get_sset_count = kszphy_get_sset_count,
961 .get_strings = kszphy_get_strings,
962 .get_stats = kszphy_get_stats,
963 .suspend = genphy_suspend,
964 .resume = genphy_resume,
965 .read_mmd_indirect = ksz9021_rd_mmd_phyreg,
966 .write_mmd_indirect = ksz9021_wr_mmd_phyreg,
967 }, {
968 .phy_id = PHY_ID_KSZ9031,
969 .phy_id_mask = MICREL_PHY_ID_MASK,
970 .name = "Micrel KSZ9031 Gigabit PHY",
971 .features = PHY_GBIT_FEATURES,
972 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
973 .driver_data = &ksz9021_type,
974 .config_init = ksz9031_config_init,
975 .config_aneg = genphy_config_aneg,
976 .read_status = ksz9031_read_status,
977 .ack_interrupt = kszphy_ack_interrupt,
978 .config_intr = kszphy_config_intr,
979 .get_sset_count = kszphy_get_sset_count,
980 .get_strings = kszphy_get_strings,
981 .get_stats = kszphy_get_stats,
982 .suspend = genphy_suspend,
983 .resume = kszphy_resume,
984 }, {
985 .phy_id = PHY_ID_KSZ8873MLL,
986 .phy_id_mask = MICREL_PHY_ID_MASK,
987 .name = "Micrel KSZ8873MLL Switch",
988 .flags = PHY_HAS_MAGICANEG,
989 .config_init = kszphy_config_init,
990 .config_aneg = ksz8873mll_config_aneg,
991 .read_status = ksz8873mll_read_status,
992 .get_sset_count = kszphy_get_sset_count,
993 .get_strings = kszphy_get_strings,
994 .get_stats = kszphy_get_stats,
995 .suspend = genphy_suspend,
996 .resume = genphy_resume,
997 }, {
998 .phy_id = PHY_ID_KSZ886X,
999 .phy_id_mask = MICREL_PHY_ID_MASK,
1000 .name = "Micrel KSZ886X Switch",
1001 .features = PHY_BASIC_FEATURES,
1002 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
1003 .config_init = kszphy_config_init,
1004 .config_aneg = genphy_config_aneg,
1005 .read_status = genphy_read_status,
1006 .get_sset_count = kszphy_get_sset_count,
1007 .get_strings = kszphy_get_strings,
1008 .get_stats = kszphy_get_stats,
1009 .suspend = genphy_suspend,
1010 .resume = genphy_resume,
1011 }, {
1012 .phy_id = PHY_ID_KSZ8795,
1013 .phy_id_mask = MICREL_PHY_ID_MASK,
1014 .name = "Micrel KSZ8795",
1015 .features = PHY_BASIC_FEATURES,
1016 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
1017 .config_init = kszphy_config_init,
1018 .config_aneg = ksz8873mll_config_aneg,
1019 .read_status = ksz8873mll_read_status,
1020 .get_sset_count = kszphy_get_sset_count,
1021 .get_strings = kszphy_get_strings,
1022 .get_stats = kszphy_get_stats,
1023 .suspend = genphy_suspend,
1024 .resume = genphy_resume,
1025 } };
1026
1027 module_phy_driver(ksphy_driver);
1028
1029 MODULE_DESCRIPTION("Micrel PHY driver");
1030 MODULE_AUTHOR("David J. Choi");
1031 MODULE_LICENSE("GPL");
1032
1033 static struct mdio_device_id __maybe_unused micrel_tbl[] = {
1034 { PHY_ID_KSZ9021, 0x000ffffe },
1035 { PHY_ID_KSZ9031, MICREL_PHY_ID_MASK },
1036 { PHY_ID_KSZ8001, 0x00fffffc },
1037 { PHY_ID_KS8737, MICREL_PHY_ID_MASK },
1038 { PHY_ID_KSZ8021, 0x00ffffff },
1039 { PHY_ID_KSZ8031, 0x00ffffff },
1040 { PHY_ID_KSZ8041, MICREL_PHY_ID_MASK },
1041 { PHY_ID_KSZ8051, MICREL_PHY_ID_MASK },
1042 { PHY_ID_KSZ8061, MICREL_PHY_ID_MASK },
1043 { PHY_ID_KSZ8081, MICREL_PHY_ID_MASK },
1044 { PHY_ID_KSZ8873MLL, MICREL_PHY_ID_MASK },
1045 { PHY_ID_KSZ886X, MICREL_PHY_ID_MASK },
1046 { }
1047 };
1048
1049 MODULE_DEVICE_TABLE(mdio, micrel_tbl);
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