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[mirror_ubuntu-zesty-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_FIBRE |
322 SUPPORTED_100baseT_Full |
323 SUPPORTED_100baseT_Half;
324 phydev->advertising &= ADVERTISED_FIBRE |
325 ADVERTISED_100baseT_Full |
326 ADVERTISED_100baseT_Half;
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 static int ksz9031_extended_write(struct phy_device *phydev,
443 u8 mode, u32 dev_addr, u32 regnum, u16 val)
444 {
445 phy_write(phydev, MII_KSZ9031RN_MMD_CTRL_REG, dev_addr);
446 phy_write(phydev, MII_KSZ9031RN_MMD_REGDATA_REG, regnum);
447 phy_write(phydev, MII_KSZ9031RN_MMD_CTRL_REG, (mode << 14) | dev_addr);
448 return phy_write(phydev, MII_KSZ9031RN_MMD_REGDATA_REG, val);
449 }
450
451 static int ksz9031_extended_read(struct phy_device *phydev,
452 u8 mode, u32 dev_addr, u32 regnum)
453 {
454 phy_write(phydev, MII_KSZ9031RN_MMD_CTRL_REG, dev_addr);
455 phy_write(phydev, MII_KSZ9031RN_MMD_REGDATA_REG, regnum);
456 phy_write(phydev, MII_KSZ9031RN_MMD_CTRL_REG, (mode << 14) | dev_addr);
457 return phy_read(phydev, MII_KSZ9031RN_MMD_REGDATA_REG);
458 }
459
460 static int ksz9031_of_load_skew_values(struct phy_device *phydev,
461 const struct device_node *of_node,
462 u16 reg, size_t field_sz,
463 const char *field[], u8 numfields)
464 {
465 int val[4] = {-1, -2, -3, -4};
466 int matches = 0;
467 u16 mask;
468 u16 maxval;
469 u16 newval;
470 int i;
471
472 for (i = 0; i < numfields; i++)
473 if (!of_property_read_u32(of_node, field[i], val + i))
474 matches++;
475
476 if (!matches)
477 return 0;
478
479 if (matches < numfields)
480 newval = ksz9031_extended_read(phydev, OP_DATA, 2, reg);
481 else
482 newval = 0;
483
484 maxval = (field_sz == 4) ? 0xf : 0x1f;
485 for (i = 0; i < numfields; i++)
486 if (val[i] != -(i + 1)) {
487 mask = 0xffff;
488 mask ^= maxval << (field_sz * i);
489 newval = (newval & mask) |
490 (((val[i] / KSZ9031_PS_TO_REG) & maxval)
491 << (field_sz * i));
492 }
493
494 return ksz9031_extended_write(phydev, OP_DATA, 2, reg, newval);
495 }
496
497 static int ksz9031_center_flp_timing(struct phy_device *phydev)
498 {
499 int result;
500
501 /* Center KSZ9031RNX FLP timing at 16ms. */
502 result = ksz9031_extended_write(phydev, OP_DATA, 0,
503 MII_KSZ9031RN_FLP_BURST_TX_HI, 0x0006);
504 result = ksz9031_extended_write(phydev, OP_DATA, 0,
505 MII_KSZ9031RN_FLP_BURST_TX_LO, 0x1A80);
506
507 if (result)
508 return result;
509
510 return genphy_restart_aneg(phydev);
511 }
512
513 static int ksz9031_config_init(struct phy_device *phydev)
514 {
515 const struct device *dev = &phydev->mdio.dev;
516 const struct device_node *of_node = dev->of_node;
517 static const char *clk_skews[2] = {"rxc-skew-ps", "txc-skew-ps"};
518 static const char *rx_data_skews[4] = {
519 "rxd0-skew-ps", "rxd1-skew-ps",
520 "rxd2-skew-ps", "rxd3-skew-ps"
521 };
522 static const char *tx_data_skews[4] = {
523 "txd0-skew-ps", "txd1-skew-ps",
524 "txd2-skew-ps", "txd3-skew-ps"
525 };
526 static const char *control_skews[2] = {"txen-skew-ps", "rxdv-skew-ps"};
527 const struct device *dev_walker;
528
529 /* The Micrel driver has a deprecated option to place phy OF
530 * properties in the MAC node. Walk up the tree of devices to
531 * find a device with an OF node.
532 */
533 dev_walker = &phydev->mdio.dev;
534 do {
535 of_node = dev_walker->of_node;
536 dev_walker = dev_walker->parent;
537 } while (!of_node && dev_walker);
538
539 if (of_node) {
540 ksz9031_of_load_skew_values(phydev, of_node,
541 MII_KSZ9031RN_CLK_PAD_SKEW, 5,
542 clk_skews, 2);
543
544 ksz9031_of_load_skew_values(phydev, of_node,
545 MII_KSZ9031RN_CONTROL_PAD_SKEW, 4,
546 control_skews, 2);
547
548 ksz9031_of_load_skew_values(phydev, of_node,
549 MII_KSZ9031RN_RX_DATA_PAD_SKEW, 4,
550 rx_data_skews, 4);
551
552 ksz9031_of_load_skew_values(phydev, of_node,
553 MII_KSZ9031RN_TX_DATA_PAD_SKEW, 4,
554 tx_data_skews, 4);
555 }
556
557 return ksz9031_center_flp_timing(phydev);
558 }
559
560 #define KSZ8873MLL_GLOBAL_CONTROL_4 0x06
561 #define KSZ8873MLL_GLOBAL_CONTROL_4_DUPLEX BIT(6)
562 #define KSZ8873MLL_GLOBAL_CONTROL_4_SPEED BIT(4)
563 static int ksz8873mll_read_status(struct phy_device *phydev)
564 {
565 int regval;
566
567 /* dummy read */
568 regval = phy_read(phydev, KSZ8873MLL_GLOBAL_CONTROL_4);
569
570 regval = phy_read(phydev, KSZ8873MLL_GLOBAL_CONTROL_4);
571
572 if (regval & KSZ8873MLL_GLOBAL_CONTROL_4_DUPLEX)
573 phydev->duplex = DUPLEX_HALF;
574 else
575 phydev->duplex = DUPLEX_FULL;
576
577 if (regval & KSZ8873MLL_GLOBAL_CONTROL_4_SPEED)
578 phydev->speed = SPEED_10;
579 else
580 phydev->speed = SPEED_100;
581
582 phydev->link = 1;
583 phydev->pause = phydev->asym_pause = 0;
584
585 return 0;
586 }
587
588 static int ksz9031_read_status(struct phy_device *phydev)
589 {
590 int err;
591 int regval;
592
593 err = genphy_read_status(phydev);
594 if (err)
595 return err;
596
597 /* Make sure the PHY is not broken. Read idle error count,
598 * and reset the PHY if it is maxed out.
599 */
600 regval = phy_read(phydev, MII_STAT1000);
601 if ((regval & 0xFF) == 0xFF) {
602 phy_init_hw(phydev);
603 phydev->link = 0;
604 }
605
606 return 0;
607 }
608
609 static int ksz8873mll_config_aneg(struct phy_device *phydev)
610 {
611 return 0;
612 }
613
614 /* This routine returns -1 as an indication to the caller that the
615 * Micrel ksz9021 10/100/1000 PHY does not support standard IEEE
616 * MMD extended PHY registers.
617 */
618 static int
619 ksz9021_rd_mmd_phyreg(struct phy_device *phydev, int ptrad, int devnum,
620 int regnum)
621 {
622 return -1;
623 }
624
625 /* This routine does nothing since the Micrel ksz9021 does not support
626 * standard IEEE MMD extended PHY registers.
627 */
628 static void
629 ksz9021_wr_mmd_phyreg(struct phy_device *phydev, int ptrad, int devnum,
630 int regnum, u32 val)
631 {
632 }
633
634 static int kszphy_get_sset_count(struct phy_device *phydev)
635 {
636 return ARRAY_SIZE(kszphy_hw_stats);
637 }
638
639 static void kszphy_get_strings(struct phy_device *phydev, u8 *data)
640 {
641 int i;
642
643 for (i = 0; i < ARRAY_SIZE(kszphy_hw_stats); i++) {
644 memcpy(data + i * ETH_GSTRING_LEN,
645 kszphy_hw_stats[i].string, ETH_GSTRING_LEN);
646 }
647 }
648
649 #ifndef UINT64_MAX
650 #define UINT64_MAX (u64)(~((u64)0))
651 #endif
652 static u64 kszphy_get_stat(struct phy_device *phydev, int i)
653 {
654 struct kszphy_hw_stat stat = kszphy_hw_stats[i];
655 struct kszphy_priv *priv = phydev->priv;
656 int val;
657 u64 ret;
658
659 val = phy_read(phydev, stat.reg);
660 if (val < 0) {
661 ret = UINT64_MAX;
662 } else {
663 val = val & ((1 << stat.bits) - 1);
664 priv->stats[i] += val;
665 ret = priv->stats[i];
666 }
667
668 return ret;
669 }
670
671 static void kszphy_get_stats(struct phy_device *phydev,
672 struct ethtool_stats *stats, u64 *data)
673 {
674 int i;
675
676 for (i = 0; i < ARRAY_SIZE(kszphy_hw_stats); i++)
677 data[i] = kszphy_get_stat(phydev, i);
678 }
679
680 static int kszphy_resume(struct phy_device *phydev)
681 {
682 int value;
683
684 mutex_lock(&phydev->lock);
685
686 value = phy_read(phydev, MII_BMCR);
687 phy_write(phydev, MII_BMCR, value & ~BMCR_PDOWN);
688
689 kszphy_config_intr(phydev);
690 mutex_unlock(&phydev->lock);
691
692 return 0;
693 }
694
695 static int kszphy_probe(struct phy_device *phydev)
696 {
697 const struct kszphy_type *type = phydev->drv->driver_data;
698 const struct device_node *np = phydev->mdio.dev.of_node;
699 struct kszphy_priv *priv;
700 struct clk *clk;
701 int ret;
702
703 priv = devm_kzalloc(&phydev->mdio.dev, sizeof(*priv), GFP_KERNEL);
704 if (!priv)
705 return -ENOMEM;
706
707 phydev->priv = priv;
708
709 priv->type = type;
710
711 if (type->led_mode_reg) {
712 ret = of_property_read_u32(np, "micrel,led-mode",
713 &priv->led_mode);
714 if (ret)
715 priv->led_mode = -1;
716
717 if (priv->led_mode > 3) {
718 phydev_err(phydev, "invalid led mode: 0x%02x\n",
719 priv->led_mode);
720 priv->led_mode = -1;
721 }
722 } else {
723 priv->led_mode = -1;
724 }
725
726 clk = devm_clk_get(&phydev->mdio.dev, "rmii-ref");
727 /* NOTE: clk may be NULL if building without CONFIG_HAVE_CLK */
728 if (!IS_ERR_OR_NULL(clk)) {
729 unsigned long rate = clk_get_rate(clk);
730 bool rmii_ref_clk_sel_25_mhz;
731
732 priv->rmii_ref_clk_sel = type->has_rmii_ref_clk_sel;
733 rmii_ref_clk_sel_25_mhz = of_property_read_bool(np,
734 "micrel,rmii-reference-clock-select-25-mhz");
735
736 if (rate > 24500000 && rate < 25500000) {
737 priv->rmii_ref_clk_sel_val = rmii_ref_clk_sel_25_mhz;
738 } else if (rate > 49500000 && rate < 50500000) {
739 priv->rmii_ref_clk_sel_val = !rmii_ref_clk_sel_25_mhz;
740 } else {
741 phydev_err(phydev, "Clock rate out of range: %ld\n",
742 rate);
743 return -EINVAL;
744 }
745 }
746
747 /* Support legacy board-file configuration */
748 if (phydev->dev_flags & MICREL_PHY_50MHZ_CLK) {
749 priv->rmii_ref_clk_sel = true;
750 priv->rmii_ref_clk_sel_val = true;
751 }
752
753 return 0;
754 }
755
756 static struct phy_driver ksphy_driver[] = {
757 {
758 .phy_id = PHY_ID_KS8737,
759 .phy_id_mask = MICREL_PHY_ID_MASK,
760 .name = "Micrel KS8737",
761 .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause),
762 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
763 .driver_data = &ks8737_type,
764 .config_init = kszphy_config_init,
765 .config_aneg = genphy_config_aneg,
766 .read_status = genphy_read_status,
767 .ack_interrupt = kszphy_ack_interrupt,
768 .config_intr = kszphy_config_intr,
769 .get_sset_count = kszphy_get_sset_count,
770 .get_strings = kszphy_get_strings,
771 .get_stats = kszphy_get_stats,
772 .suspend = genphy_suspend,
773 .resume = genphy_resume,
774 }, {
775 .phy_id = PHY_ID_KSZ8021,
776 .phy_id_mask = 0x00ffffff,
777 .name = "Micrel KSZ8021 or KSZ8031",
778 .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause |
779 SUPPORTED_Asym_Pause),
780 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
781 .driver_data = &ksz8021_type,
782 .probe = kszphy_probe,
783 .config_init = kszphy_config_init,
784 .config_aneg = genphy_config_aneg,
785 .read_status = genphy_read_status,
786 .ack_interrupt = kszphy_ack_interrupt,
787 .config_intr = kszphy_config_intr,
788 .get_sset_count = kszphy_get_sset_count,
789 .get_strings = kszphy_get_strings,
790 .get_stats = kszphy_get_stats,
791 .suspend = genphy_suspend,
792 .resume = genphy_resume,
793 }, {
794 .phy_id = PHY_ID_KSZ8031,
795 .phy_id_mask = 0x00ffffff,
796 .name = "Micrel KSZ8031",
797 .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause |
798 SUPPORTED_Asym_Pause),
799 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
800 .driver_data = &ksz8021_type,
801 .probe = kszphy_probe,
802 .config_init = kszphy_config_init,
803 .config_aneg = genphy_config_aneg,
804 .read_status = genphy_read_status,
805 .ack_interrupt = kszphy_ack_interrupt,
806 .config_intr = kszphy_config_intr,
807 .get_sset_count = kszphy_get_sset_count,
808 .get_strings = kszphy_get_strings,
809 .get_stats = kszphy_get_stats,
810 .suspend = genphy_suspend,
811 .resume = genphy_resume,
812 }, {
813 .phy_id = PHY_ID_KSZ8041,
814 .phy_id_mask = MICREL_PHY_ID_MASK,
815 .name = "Micrel KSZ8041",
816 .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause
817 | SUPPORTED_Asym_Pause),
818 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
819 .driver_data = &ksz8041_type,
820 .probe = kszphy_probe,
821 .config_init = ksz8041_config_init,
822 .config_aneg = ksz8041_config_aneg,
823 .read_status = genphy_read_status,
824 .ack_interrupt = kszphy_ack_interrupt,
825 .config_intr = kszphy_config_intr,
826 .get_sset_count = kszphy_get_sset_count,
827 .get_strings = kszphy_get_strings,
828 .get_stats = kszphy_get_stats,
829 .suspend = genphy_suspend,
830 .resume = genphy_resume,
831 }, {
832 .phy_id = PHY_ID_KSZ8041RNLI,
833 .phy_id_mask = MICREL_PHY_ID_MASK,
834 .name = "Micrel KSZ8041RNLI",
835 .features = PHY_BASIC_FEATURES |
836 SUPPORTED_Pause | SUPPORTED_Asym_Pause,
837 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
838 .driver_data = &ksz8041_type,
839 .probe = kszphy_probe,
840 .config_init = kszphy_config_init,
841 .config_aneg = genphy_config_aneg,
842 .read_status = genphy_read_status,
843 .ack_interrupt = kszphy_ack_interrupt,
844 .config_intr = kszphy_config_intr,
845 .get_sset_count = kszphy_get_sset_count,
846 .get_strings = kszphy_get_strings,
847 .get_stats = kszphy_get_stats,
848 .suspend = genphy_suspend,
849 .resume = genphy_resume,
850 }, {
851 .phy_id = PHY_ID_KSZ8051,
852 .phy_id_mask = MICREL_PHY_ID_MASK,
853 .name = "Micrel KSZ8051",
854 .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause
855 | SUPPORTED_Asym_Pause),
856 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
857 .driver_data = &ksz8051_type,
858 .probe = kszphy_probe,
859 .config_init = kszphy_config_init,
860 .config_aneg = genphy_config_aneg,
861 .read_status = genphy_read_status,
862 .ack_interrupt = kszphy_ack_interrupt,
863 .config_intr = kszphy_config_intr,
864 .get_sset_count = kszphy_get_sset_count,
865 .get_strings = kszphy_get_strings,
866 .get_stats = kszphy_get_stats,
867 .suspend = genphy_suspend,
868 .resume = genphy_resume,
869 }, {
870 .phy_id = PHY_ID_KSZ8001,
871 .name = "Micrel KSZ8001 or KS8721",
872 .phy_id_mask = 0x00fffffc,
873 .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause),
874 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
875 .driver_data = &ksz8041_type,
876 .probe = kszphy_probe,
877 .config_init = kszphy_config_init,
878 .config_aneg = genphy_config_aneg,
879 .read_status = genphy_read_status,
880 .ack_interrupt = kszphy_ack_interrupt,
881 .config_intr = kszphy_config_intr,
882 .get_sset_count = kszphy_get_sset_count,
883 .get_strings = kszphy_get_strings,
884 .get_stats = kszphy_get_stats,
885 .suspend = genphy_suspend,
886 .resume = genphy_resume,
887 }, {
888 .phy_id = PHY_ID_KSZ8081,
889 .name = "Micrel KSZ8081 or KSZ8091",
890 .phy_id_mask = MICREL_PHY_ID_MASK,
891 .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause),
892 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
893 .driver_data = &ksz8081_type,
894 .probe = kszphy_probe,
895 .config_init = kszphy_config_init,
896 .config_aneg = genphy_config_aneg,
897 .read_status = genphy_read_status,
898 .ack_interrupt = kszphy_ack_interrupt,
899 .config_intr = kszphy_config_intr,
900 .get_sset_count = kszphy_get_sset_count,
901 .get_strings = kszphy_get_strings,
902 .get_stats = kszphy_get_stats,
903 .suspend = genphy_suspend,
904 .resume = kszphy_resume,
905 }, {
906 .phy_id = PHY_ID_KSZ8061,
907 .name = "Micrel KSZ8061",
908 .phy_id_mask = MICREL_PHY_ID_MASK,
909 .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause),
910 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
911 .config_init = kszphy_config_init,
912 .config_aneg = genphy_config_aneg,
913 .read_status = genphy_read_status,
914 .ack_interrupt = kszphy_ack_interrupt,
915 .config_intr = kszphy_config_intr,
916 .get_sset_count = kszphy_get_sset_count,
917 .get_strings = kszphy_get_strings,
918 .get_stats = kszphy_get_stats,
919 .suspend = genphy_suspend,
920 .resume = genphy_resume,
921 }, {
922 .phy_id = PHY_ID_KSZ9021,
923 .phy_id_mask = 0x000ffffe,
924 .name = "Micrel KSZ9021 Gigabit PHY",
925 .features = (PHY_GBIT_FEATURES | SUPPORTED_Pause),
926 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
927 .driver_data = &ksz9021_type,
928 .config_init = ksz9021_config_init,
929 .config_aneg = genphy_config_aneg,
930 .read_status = genphy_read_status,
931 .ack_interrupt = kszphy_ack_interrupt,
932 .config_intr = kszphy_config_intr,
933 .get_sset_count = kszphy_get_sset_count,
934 .get_strings = kszphy_get_strings,
935 .get_stats = kszphy_get_stats,
936 .suspend = genphy_suspend,
937 .resume = genphy_resume,
938 .read_mmd_indirect = ksz9021_rd_mmd_phyreg,
939 .write_mmd_indirect = ksz9021_wr_mmd_phyreg,
940 }, {
941 .phy_id = PHY_ID_KSZ9031,
942 .phy_id_mask = MICREL_PHY_ID_MASK,
943 .name = "Micrel KSZ9031 Gigabit PHY",
944 .features = (PHY_GBIT_FEATURES | SUPPORTED_Pause),
945 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
946 .driver_data = &ksz9021_type,
947 .config_init = ksz9031_config_init,
948 .config_aneg = genphy_config_aneg,
949 .read_status = ksz9031_read_status,
950 .ack_interrupt = kszphy_ack_interrupt,
951 .config_intr = kszphy_config_intr,
952 .get_sset_count = kszphy_get_sset_count,
953 .get_strings = kszphy_get_strings,
954 .get_stats = kszphy_get_stats,
955 .suspend = genphy_suspend,
956 .resume = genphy_resume,
957 }, {
958 .phy_id = PHY_ID_KSZ8873MLL,
959 .phy_id_mask = MICREL_PHY_ID_MASK,
960 .name = "Micrel KSZ8873MLL Switch",
961 .features = (SUPPORTED_Pause | SUPPORTED_Asym_Pause),
962 .flags = PHY_HAS_MAGICANEG,
963 .config_init = kszphy_config_init,
964 .config_aneg = ksz8873mll_config_aneg,
965 .read_status = ksz8873mll_read_status,
966 .get_sset_count = kszphy_get_sset_count,
967 .get_strings = kszphy_get_strings,
968 .get_stats = kszphy_get_stats,
969 .suspend = genphy_suspend,
970 .resume = genphy_resume,
971 }, {
972 .phy_id = PHY_ID_KSZ886X,
973 .phy_id_mask = MICREL_PHY_ID_MASK,
974 .name = "Micrel KSZ886X Switch",
975 .features = (PHY_BASIC_FEATURES | SUPPORTED_Pause),
976 .flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
977 .config_init = kszphy_config_init,
978 .config_aneg = genphy_config_aneg,
979 .read_status = genphy_read_status,
980 .get_sset_count = kszphy_get_sset_count,
981 .get_strings = kszphy_get_strings,
982 .get_stats = kszphy_get_stats,
983 .suspend = genphy_suspend,
984 .resume = genphy_resume,
985 } };
986
987 module_phy_driver(ksphy_driver);
988
989 MODULE_DESCRIPTION("Micrel PHY driver");
990 MODULE_AUTHOR("David J. Choi");
991 MODULE_LICENSE("GPL");
992
993 static struct mdio_device_id __maybe_unused micrel_tbl[] = {
994 { PHY_ID_KSZ9021, 0x000ffffe },
995 { PHY_ID_KSZ9031, MICREL_PHY_ID_MASK },
996 { PHY_ID_KSZ8001, 0x00fffffc },
997 { PHY_ID_KS8737, MICREL_PHY_ID_MASK },
998 { PHY_ID_KSZ8021, 0x00ffffff },
999 { PHY_ID_KSZ8031, 0x00ffffff },
1000 { PHY_ID_KSZ8041, MICREL_PHY_ID_MASK },
1001 { PHY_ID_KSZ8051, MICREL_PHY_ID_MASK },
1002 { PHY_ID_KSZ8061, MICREL_PHY_ID_MASK },
1003 { PHY_ID_KSZ8081, MICREL_PHY_ID_MASK },
1004 { PHY_ID_KSZ8873MLL, MICREL_PHY_ID_MASK },
1005 { PHY_ID_KSZ886X, MICREL_PHY_ID_MASK },
1006 { }
1007 };
1008
1009 MODULE_DEVICE_TABLE(mdio, micrel_tbl);
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