1 // SPDX-License-Identifier: GPL-2.0
2 /* Driver for the Texas Instruments DP83869 PHY
3 * Copyright (C) 2019 Texas Instruments Inc.
4 */
5
6 #include <linux/ethtool.h>
7 #include <linux/etherdevice.h>
8 #include <linux/kernel.h>
9 #include <linux/mii.h>
10 #include <linux/module.h>
11 #include <linux/of.h>
12 #include <linux/phy.h>
13 #include <linux/delay.h>
14 #include <linux/bitfield.h>
15
16 #include <dt-bindings/net/ti-dp83869.h>
17
18 #define DP83869_PHY_ID 0x2000a0f1
19 #define DP83561_PHY_ID 0x2000a1a4
20 #define DP83869_DEVADDR 0x1f
21
22 #define MII_DP83869_PHYCTRL 0x10
23 #define MII_DP83869_MICR 0x12
24 #define MII_DP83869_ISR 0x13
25 #define DP83869_CFG2 0x14
26 #define DP83869_CTRL 0x1f
27 #define DP83869_CFG4 0x1e
28
29 /* Extended Registers */
30 #define DP83869_GEN_CFG3 0x0031
31 #define DP83869_RGMIICTL 0x0032
32 #define DP83869_STRAP_STS1 0x006e
33 #define DP83869_RGMIIDCTL 0x0086
34 #define DP83869_RXFCFG 0x0134
35 #define DP83869_RXFPMD1 0x0136
36 #define DP83869_RXFPMD2 0x0137
37 #define DP83869_RXFPMD3 0x0138
38 #define DP83869_RXFSOP1 0x0139
39 #define DP83869_RXFSOP2 0x013A
40 #define DP83869_RXFSOP3 0x013B
41 #define DP83869_IO_MUX_CFG 0x0170
42 #define DP83869_OP_MODE 0x01df
43 #define DP83869_FX_CTRL 0x0c00
44
45 #define DP83869_SW_RESET BIT(15)
46 #define DP83869_SW_RESTART BIT(14)
47
48 /* MICR Interrupt bits */
49 #define MII_DP83869_MICR_AN_ERR_INT_EN BIT(15)
50 #define MII_DP83869_MICR_SPEED_CHNG_INT_EN BIT(14)
51 #define MII_DP83869_MICR_DUP_MODE_CHNG_INT_EN BIT(13)
52 #define MII_DP83869_MICR_PAGE_RXD_INT_EN BIT(12)
53 #define MII_DP83869_MICR_AUTONEG_COMP_INT_EN BIT(11)
54 #define MII_DP83869_MICR_LINK_STS_CHNG_INT_EN BIT(10)
55 #define MII_DP83869_MICR_FALSE_CARRIER_INT_EN BIT(8)
56 #define MII_DP83869_MICR_SLEEP_MODE_CHNG_INT_EN BIT(4)
57 #define MII_DP83869_MICR_WOL_INT_EN BIT(3)
58 #define MII_DP83869_MICR_XGMII_ERR_INT_EN BIT(2)
59 #define MII_DP83869_MICR_POL_CHNG_INT_EN BIT(1)
60 #define MII_DP83869_MICR_JABBER_INT_EN BIT(0)
61
62 #define MII_DP83869_BMCR_DEFAULT (BMCR_ANENABLE | \
63 BMCR_FULLDPLX | \
64 BMCR_SPEED1000)
65
66 #define MII_DP83869_FIBER_ADVERTISE (ADVERTISED_FIBRE | \
67 ADVERTISED_Pause | \
68 ADVERTISED_Asym_Pause)
69
70 /* This is the same bit mask as the BMCR so re-use the BMCR default */
71 #define DP83869_FX_CTRL_DEFAULT MII_DP83869_BMCR_DEFAULT
72
73 /* CFG1 bits */
74 #define DP83869_CFG1_DEFAULT (ADVERTISE_1000HALF | \
75 ADVERTISE_1000FULL | \
76 CTL1000_AS_MASTER)
77
78 /* RGMIICTL bits */
79 #define DP83869_RGMII_TX_CLK_DELAY_EN BIT(1)
80 #define DP83869_RGMII_RX_CLK_DELAY_EN BIT(0)
81
82 /* RGMIIDCTL */
83 #define DP83869_RGMII_CLK_DELAY_SHIFT 4
84 #define DP83869_CLK_DELAY_DEF 7
85
86 /* STRAP_STS1 bits */
87 #define DP83869_STRAP_OP_MODE_MASK GENMASK(2, 0)
88 #define DP83869_STRAP_STS1_RESERVED BIT(11)
89 #define DP83869_STRAP_MIRROR_ENABLED BIT(12)
90
91 /* PHYCTRL bits */
92 #define DP83869_RX_FIFO_SHIFT 12
93 #define DP83869_TX_FIFO_SHIFT 14
94
95 /* PHY_CTRL lower bytes 0x48 are declared as reserved */
96 #define DP83869_PHY_CTRL_DEFAULT 0x48
97 #define DP83869_PHYCR_FIFO_DEPTH_MASK GENMASK(15, 12)
98 #define DP83869_PHYCR_RESERVED_MASK BIT(11)
99
100 /* IO_MUX_CFG bits */
101 #define DP83869_IO_MUX_CFG_IO_IMPEDANCE_CTRL 0x1f
102
103 #define DP83869_IO_MUX_CFG_IO_IMPEDANCE_MAX 0x0
104 #define DP83869_IO_MUX_CFG_IO_IMPEDANCE_MIN 0x1f
105 #define DP83869_IO_MUX_CFG_CLK_O_SEL_MASK (0x1f << 8)
106 #define DP83869_IO_MUX_CFG_CLK_O_SEL_SHIFT 8
107
108 /* CFG3 bits */
109 #define DP83869_CFG3_PORT_MIRROR_EN BIT(0)
110
111 /* CFG4 bits */
112 #define DP83869_INT_OE BIT(7)
113
114 /* OP MODE */
115 #define DP83869_OP_MODE_MII BIT(5)
116 #define DP83869_SGMII_RGMII_BRIDGE BIT(6)
117
118 /* RXFCFG bits*/
119 #define DP83869_WOL_MAGIC_EN BIT(0)
120 #define DP83869_WOL_PATTERN_EN BIT(1)
121 #define DP83869_WOL_BCAST_EN BIT(2)
122 #define DP83869_WOL_UCAST_EN BIT(4)
123 #define DP83869_WOL_SEC_EN BIT(5)
124 #define DP83869_WOL_ENH_MAC BIT(7)
125
126 /* CFG2 bits */
127 #define DP83869_DOWNSHIFT_EN (BIT(8) | BIT(9))
128 #define DP83869_DOWNSHIFT_ATTEMPT_MASK (BIT(10) | BIT(11))
129 #define DP83869_DOWNSHIFT_1_COUNT_VAL 0
130 #define DP83869_DOWNSHIFT_2_COUNT_VAL 1
131 #define DP83869_DOWNSHIFT_4_COUNT_VAL 2
132 #define DP83869_DOWNSHIFT_8_COUNT_VAL 3
133 #define DP83869_DOWNSHIFT_1_COUNT 1
134 #define DP83869_DOWNSHIFT_2_COUNT 2
135 #define DP83869_DOWNSHIFT_4_COUNT 4
136 #define DP83869_DOWNSHIFT_8_COUNT 8
137
138 enum {
139 DP83869_PORT_MIRRORING_KEEP,
140 DP83869_PORT_MIRRORING_EN,
141 DP83869_PORT_MIRRORING_DIS,
142 };
143
144 struct dp83869_private {
145 int tx_fifo_depth;
146 int rx_fifo_depth;
147 s32 rx_int_delay;
148 s32 tx_int_delay;
149 int io_impedance;
150 int port_mirroring;
151 bool rxctrl_strap_quirk;
152 int clk_output_sel;
153 int mode;
154 };
155
dp83869_config_aneg(struct phy_device * phydev)156 static int dp83869_config_aneg(struct phy_device *phydev)
157 {
158 struct dp83869_private *dp83869 = phydev->priv;
159
160 if (dp83869->mode != DP83869_RGMII_1000_BASE)
161 return genphy_config_aneg(phydev);
162
163 return genphy_c37_config_aneg(phydev);
164 }
165
dp83869_read_status(struct phy_device * phydev)166 static int dp83869_read_status(struct phy_device *phydev)
167 {
168 struct dp83869_private *dp83869 = phydev->priv;
169 bool changed;
170 int ret;
171
172 if (dp83869->mode == DP83869_RGMII_1000_BASE)
173 return genphy_c37_read_status(phydev, &changed);
174
175 ret = genphy_read_status(phydev);
176 if (ret)
177 return ret;
178
179 if (dp83869->mode == DP83869_RGMII_100_BASE) {
180 if (phydev->link) {
181 phydev->speed = SPEED_100;
182 } else {
183 phydev->speed = SPEED_UNKNOWN;
184 phydev->duplex = DUPLEX_UNKNOWN;
185 }
186 }
187
188 return 0;
189 }
190
dp83869_ack_interrupt(struct phy_device * phydev)191 static int dp83869_ack_interrupt(struct phy_device *phydev)
192 {
193 int err = phy_read(phydev, MII_DP83869_ISR);
194
195 if (err < 0)
196 return err;
197
198 return 0;
199 }
200
dp83869_config_intr(struct phy_device * phydev)201 static int dp83869_config_intr(struct phy_device *phydev)
202 {
203 int micr_status = 0, err;
204
205 if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
206 err = dp83869_ack_interrupt(phydev);
207 if (err)
208 return err;
209
210 micr_status = phy_read(phydev, MII_DP83869_MICR);
211 if (micr_status < 0)
212 return micr_status;
213
214 micr_status |=
215 (MII_DP83869_MICR_AN_ERR_INT_EN |
216 MII_DP83869_MICR_SPEED_CHNG_INT_EN |
217 MII_DP83869_MICR_AUTONEG_COMP_INT_EN |
218 MII_DP83869_MICR_LINK_STS_CHNG_INT_EN |
219 MII_DP83869_MICR_DUP_MODE_CHNG_INT_EN |
220 MII_DP83869_MICR_SLEEP_MODE_CHNG_INT_EN);
221
222 err = phy_write(phydev, MII_DP83869_MICR, micr_status);
223 } else {
224 err = phy_write(phydev, MII_DP83869_MICR, micr_status);
225 if (err)
226 return err;
227
228 err = dp83869_ack_interrupt(phydev);
229 }
230
231 return err;
232 }
233
dp83869_handle_interrupt(struct phy_device * phydev)234 static irqreturn_t dp83869_handle_interrupt(struct phy_device *phydev)
235 {
236 int irq_status, irq_enabled;
237
238 irq_status = phy_read(phydev, MII_DP83869_ISR);
239 if (irq_status < 0) {
240 phy_error(phydev);
241 return IRQ_NONE;
242 }
243
244 irq_enabled = phy_read(phydev, MII_DP83869_MICR);
245 if (irq_enabled < 0) {
246 phy_error(phydev);
247 return IRQ_NONE;
248 }
249
250 if (!(irq_status & irq_enabled))
251 return IRQ_NONE;
252
253 phy_trigger_machine(phydev);
254
255 return IRQ_HANDLED;
256 }
257
dp83869_set_wol(struct phy_device * phydev,struct ethtool_wolinfo * wol)258 static int dp83869_set_wol(struct phy_device *phydev,
259 struct ethtool_wolinfo *wol)
260 {
261 struct net_device *ndev = phydev->attached_dev;
262 int val_rxcfg, val_micr;
263 const u8 *mac;
264 int ret;
265
266 val_rxcfg = phy_read_mmd(phydev, DP83869_DEVADDR, DP83869_RXFCFG);
267 if (val_rxcfg < 0)
268 return val_rxcfg;
269
270 val_micr = phy_read(phydev, MII_DP83869_MICR);
271 if (val_micr < 0)
272 return val_micr;
273
274 if (wol->wolopts & (WAKE_MAGIC | WAKE_MAGICSECURE | WAKE_UCAST |
275 WAKE_BCAST)) {
276 val_rxcfg |= DP83869_WOL_ENH_MAC;
277 val_micr |= MII_DP83869_MICR_WOL_INT_EN;
278
279 if (wol->wolopts & WAKE_MAGIC ||
280 wol->wolopts & WAKE_MAGICSECURE) {
281 mac = (const u8 *)ndev->dev_addr;
282
283 if (!is_valid_ether_addr(mac))
284 return -EINVAL;
285
286 ret = phy_write_mmd(phydev, DP83869_DEVADDR,
287 DP83869_RXFPMD1,
288 mac[1] << 8 | mac[0]);
289 if (ret)
290 return ret;
291
292 ret = phy_write_mmd(phydev, DP83869_DEVADDR,
293 DP83869_RXFPMD2,
294 mac[3] << 8 | mac[2]);
295 if (ret)
296 return ret;
297
298 ret = phy_write_mmd(phydev, DP83869_DEVADDR,
299 DP83869_RXFPMD3,
300 mac[5] << 8 | mac[4]);
301 if (ret)
302 return ret;
303
304 val_rxcfg |= DP83869_WOL_MAGIC_EN;
305 } else {
306 val_rxcfg &= ~DP83869_WOL_MAGIC_EN;
307 }
308
309 if (wol->wolopts & WAKE_MAGICSECURE) {
310 ret = phy_write_mmd(phydev, DP83869_DEVADDR,
311 DP83869_RXFSOP1,
312 (wol->sopass[1] << 8) | wol->sopass[0]);
313 if (ret)
314 return ret;
315
316 ret = phy_write_mmd(phydev, DP83869_DEVADDR,
317 DP83869_RXFSOP2,
318 (wol->sopass[3] << 8) | wol->sopass[2]);
319 if (ret)
320 return ret;
321 ret = phy_write_mmd(phydev, DP83869_DEVADDR,
322 DP83869_RXFSOP3,
323 (wol->sopass[5] << 8) | wol->sopass[4]);
324 if (ret)
325 return ret;
326
327 val_rxcfg |= DP83869_WOL_SEC_EN;
328 } else {
329 val_rxcfg &= ~DP83869_WOL_SEC_EN;
330 }
331
332 if (wol->wolopts & WAKE_UCAST)
333 val_rxcfg |= DP83869_WOL_UCAST_EN;
334 else
335 val_rxcfg &= ~DP83869_WOL_UCAST_EN;
336
337 if (wol->wolopts & WAKE_BCAST)
338 val_rxcfg |= DP83869_WOL_BCAST_EN;
339 else
340 val_rxcfg &= ~DP83869_WOL_BCAST_EN;
341 } else {
342 val_rxcfg &= ~DP83869_WOL_ENH_MAC;
343 val_micr &= ~MII_DP83869_MICR_WOL_INT_EN;
344 }
345
346 ret = phy_write_mmd(phydev, DP83869_DEVADDR, DP83869_RXFCFG, val_rxcfg);
347 if (ret)
348 return ret;
349
350 return phy_write(phydev, MII_DP83869_MICR, val_micr);
351 }
352
dp83869_get_wol(struct phy_device * phydev,struct ethtool_wolinfo * wol)353 static void dp83869_get_wol(struct phy_device *phydev,
354 struct ethtool_wolinfo *wol)
355 {
356 int value, sopass_val;
357
358 wol->supported = (WAKE_UCAST | WAKE_BCAST | WAKE_MAGIC |
359 WAKE_MAGICSECURE);
360 wol->wolopts = 0;
361
362 value = phy_read_mmd(phydev, DP83869_DEVADDR, DP83869_RXFCFG);
363 if (value < 0) {
364 phydev_err(phydev, "Failed to read RX CFG\n");
365 return;
366 }
367
368 if (value & DP83869_WOL_UCAST_EN)
369 wol->wolopts |= WAKE_UCAST;
370
371 if (value & DP83869_WOL_BCAST_EN)
372 wol->wolopts |= WAKE_BCAST;
373
374 if (value & DP83869_WOL_MAGIC_EN)
375 wol->wolopts |= WAKE_MAGIC;
376
377 if (value & DP83869_WOL_SEC_EN) {
378 sopass_val = phy_read_mmd(phydev, DP83869_DEVADDR,
379 DP83869_RXFSOP1);
380 if (sopass_val < 0) {
381 phydev_err(phydev, "Failed to read RX SOP 1\n");
382 return;
383 }
384
385 wol->sopass[0] = (sopass_val & 0xff);
386 wol->sopass[1] = (sopass_val >> 8);
387
388 sopass_val = phy_read_mmd(phydev, DP83869_DEVADDR,
389 DP83869_RXFSOP2);
390 if (sopass_val < 0) {
391 phydev_err(phydev, "Failed to read RX SOP 2\n");
392 return;
393 }
394
395 wol->sopass[2] = (sopass_val & 0xff);
396 wol->sopass[3] = (sopass_val >> 8);
397
398 sopass_val = phy_read_mmd(phydev, DP83869_DEVADDR,
399 DP83869_RXFSOP3);
400 if (sopass_val < 0) {
401 phydev_err(phydev, "Failed to read RX SOP 3\n");
402 return;
403 }
404
405 wol->sopass[4] = (sopass_val & 0xff);
406 wol->sopass[5] = (sopass_val >> 8);
407
408 wol->wolopts |= WAKE_MAGICSECURE;
409 }
410
411 if (!(value & DP83869_WOL_ENH_MAC))
412 wol->wolopts = 0;
413 }
414
dp83869_get_downshift(struct phy_device * phydev,u8 * data)415 static int dp83869_get_downshift(struct phy_device *phydev, u8 *data)
416 {
417 int val, cnt, enable, count;
418
419 val = phy_read(phydev, DP83869_CFG2);
420 if (val < 0)
421 return val;
422
423 enable = FIELD_GET(DP83869_DOWNSHIFT_EN, val);
424 cnt = FIELD_GET(DP83869_DOWNSHIFT_ATTEMPT_MASK, val);
425
426 switch (cnt) {
427 case DP83869_DOWNSHIFT_1_COUNT_VAL:
428 count = DP83869_DOWNSHIFT_1_COUNT;
429 break;
430 case DP83869_DOWNSHIFT_2_COUNT_VAL:
431 count = DP83869_DOWNSHIFT_2_COUNT;
432 break;
433 case DP83869_DOWNSHIFT_4_COUNT_VAL:
434 count = DP83869_DOWNSHIFT_4_COUNT;
435 break;
436 case DP83869_DOWNSHIFT_8_COUNT_VAL:
437 count = DP83869_DOWNSHIFT_8_COUNT;
438 break;
439 default:
440 return -EINVAL;
441 }
442
443 *data = enable ? count : DOWNSHIFT_DEV_DISABLE;
444
445 return 0;
446 }
447
dp83869_set_downshift(struct phy_device * phydev,u8 cnt)448 static int dp83869_set_downshift(struct phy_device *phydev, u8 cnt)
449 {
450 int val, count;
451
452 if (cnt > DP83869_DOWNSHIFT_8_COUNT)
453 return -EINVAL;
454
455 if (!cnt)
456 return phy_clear_bits(phydev, DP83869_CFG2,
457 DP83869_DOWNSHIFT_EN);
458
459 switch (cnt) {
460 case DP83869_DOWNSHIFT_1_COUNT:
461 count = DP83869_DOWNSHIFT_1_COUNT_VAL;
462 break;
463 case DP83869_DOWNSHIFT_2_COUNT:
464 count = DP83869_DOWNSHIFT_2_COUNT_VAL;
465 break;
466 case DP83869_DOWNSHIFT_4_COUNT:
467 count = DP83869_DOWNSHIFT_4_COUNT_VAL;
468 break;
469 case DP83869_DOWNSHIFT_8_COUNT:
470 count = DP83869_DOWNSHIFT_8_COUNT_VAL;
471 break;
472 default:
473 phydev_err(phydev,
474 "Downshift count must be 1, 2, 4 or 8\n");
475 return -EINVAL;
476 }
477
478 val = DP83869_DOWNSHIFT_EN;
479 val |= FIELD_PREP(DP83869_DOWNSHIFT_ATTEMPT_MASK, count);
480
481 return phy_modify(phydev, DP83869_CFG2,
482 DP83869_DOWNSHIFT_EN | DP83869_DOWNSHIFT_ATTEMPT_MASK,
483 val);
484 }
485
dp83869_get_tunable(struct phy_device * phydev,struct ethtool_tunable * tuna,void * data)486 static int dp83869_get_tunable(struct phy_device *phydev,
487 struct ethtool_tunable *tuna, void *data)
488 {
489 switch (tuna->id) {
490 case ETHTOOL_PHY_DOWNSHIFT:
491 return dp83869_get_downshift(phydev, data);
492 default:
493 return -EOPNOTSUPP;
494 }
495 }
496
dp83869_set_tunable(struct phy_device * phydev,struct ethtool_tunable * tuna,const void * data)497 static int dp83869_set_tunable(struct phy_device *phydev,
498 struct ethtool_tunable *tuna, const void *data)
499 {
500 switch (tuna->id) {
501 case ETHTOOL_PHY_DOWNSHIFT:
502 return dp83869_set_downshift(phydev, *(const u8 *)data);
503 default:
504 return -EOPNOTSUPP;
505 }
506 }
507
dp83869_config_port_mirroring(struct phy_device * phydev)508 static int dp83869_config_port_mirroring(struct phy_device *phydev)
509 {
510 struct dp83869_private *dp83869 = phydev->priv;
511
512 if (dp83869->port_mirroring == DP83869_PORT_MIRRORING_EN)
513 return phy_set_bits_mmd(phydev, DP83869_DEVADDR,
514 DP83869_GEN_CFG3,
515 DP83869_CFG3_PORT_MIRROR_EN);
516 else
517 return phy_clear_bits_mmd(phydev, DP83869_DEVADDR,
518 DP83869_GEN_CFG3,
519 DP83869_CFG3_PORT_MIRROR_EN);
520 }
521
dp83869_set_strapped_mode(struct phy_device * phydev)522 static int dp83869_set_strapped_mode(struct phy_device *phydev)
523 {
524 struct dp83869_private *dp83869 = phydev->priv;
525 int val;
526
527 val = phy_read_mmd(phydev, DP83869_DEVADDR, DP83869_STRAP_STS1);
528 if (val < 0)
529 return val;
530
531 dp83869->mode = val & DP83869_STRAP_OP_MODE_MASK;
532
533 return 0;
534 }
535
536 #if IS_ENABLED(CONFIG_OF_MDIO)
537 static const int dp83869_internal_delay[] = {250, 500, 750, 1000, 1250, 1500,
538 1750, 2000, 2250, 2500, 2750, 3000,
539 3250, 3500, 3750, 4000};
540
dp83869_of_init(struct phy_device * phydev)541 static int dp83869_of_init(struct phy_device *phydev)
542 {
543 struct device_node *of_node = phydev->mdio.dev.of_node;
544 struct dp83869_private *dp83869 = phydev->priv;
545 int delay_size = ARRAY_SIZE(dp83869_internal_delay);
546 int ret;
547
548 if (!of_node)
549 return -ENODEV;
550
551 dp83869->io_impedance = -EINVAL;
552
553 /* Optional configuration */
554 ret = of_property_read_u32(of_node, "ti,clk-output-sel",
555 &dp83869->clk_output_sel);
556 if (ret || dp83869->clk_output_sel > DP83869_CLK_O_SEL_REF_CLK)
557 dp83869->clk_output_sel = DP83869_CLK_O_SEL_REF_CLK;
558
559 ret = of_property_read_u32(of_node, "ti,op-mode", &dp83869->mode);
560 if (ret == 0) {
561 if (dp83869->mode < DP83869_RGMII_COPPER_ETHERNET ||
562 dp83869->mode > DP83869_SGMII_COPPER_ETHERNET)
563 return -EINVAL;
564 } else {
565 ret = dp83869_set_strapped_mode(phydev);
566 if (ret)
567 return ret;
568 }
569
570 if (of_property_read_bool(of_node, "ti,max-output-impedance"))
571 dp83869->io_impedance = DP83869_IO_MUX_CFG_IO_IMPEDANCE_MAX;
572 else if (of_property_read_bool(of_node, "ti,min-output-impedance"))
573 dp83869->io_impedance = DP83869_IO_MUX_CFG_IO_IMPEDANCE_MIN;
574
575 if (of_property_read_bool(of_node, "enet-phy-lane-swap")) {
576 dp83869->port_mirroring = DP83869_PORT_MIRRORING_EN;
577 } else {
578 /* If the lane swap is not in the DT then check the straps */
579 ret = phy_read_mmd(phydev, DP83869_DEVADDR, DP83869_STRAP_STS1);
580 if (ret < 0)
581 return ret;
582
583 if (ret & DP83869_STRAP_MIRROR_ENABLED)
584 dp83869->port_mirroring = DP83869_PORT_MIRRORING_EN;
585 else
586 dp83869->port_mirroring = DP83869_PORT_MIRRORING_DIS;
587
588 ret = 0;
589 }
590
591 if (of_property_read_u32(of_node, "rx-fifo-depth",
592 &dp83869->rx_fifo_depth))
593 dp83869->rx_fifo_depth = DP83869_PHYCR_FIFO_DEPTH_4_B_NIB;
594
595 if (of_property_read_u32(of_node, "tx-fifo-depth",
596 &dp83869->tx_fifo_depth))
597 dp83869->tx_fifo_depth = DP83869_PHYCR_FIFO_DEPTH_4_B_NIB;
598
599 dp83869->rx_int_delay = phy_get_internal_delay(phydev,
600 &dp83869_internal_delay[0],
601 delay_size, true);
602 if (dp83869->rx_int_delay < 0)
603 dp83869->rx_int_delay = DP83869_CLK_DELAY_DEF;
604
605 dp83869->tx_int_delay = phy_get_internal_delay(phydev,
606 &dp83869_internal_delay[0],
607 delay_size, false);
608 if (dp83869->tx_int_delay < 0)
609 dp83869->tx_int_delay = DP83869_CLK_DELAY_DEF;
610
611 return ret;
612 }
613 #else
dp83869_of_init(struct phy_device * phydev)614 static int dp83869_of_init(struct phy_device *phydev)
615 {
616 return dp83869_set_strapped_mode(phydev);
617 }
618 #endif /* CONFIG_OF_MDIO */
619
dp83869_configure_rgmii(struct phy_device * phydev,struct dp83869_private * dp83869)620 static int dp83869_configure_rgmii(struct phy_device *phydev,
621 struct dp83869_private *dp83869)
622 {
623 int ret = 0, val;
624
625 if (phy_interface_is_rgmii(phydev)) {
626 val = phy_read(phydev, MII_DP83869_PHYCTRL);
627 if (val < 0)
628 return val;
629
630 val &= ~DP83869_PHYCR_FIFO_DEPTH_MASK;
631 val |= (dp83869->tx_fifo_depth << DP83869_TX_FIFO_SHIFT);
632 val |= (dp83869->rx_fifo_depth << DP83869_RX_FIFO_SHIFT);
633
634 ret = phy_write(phydev, MII_DP83869_PHYCTRL, val);
635 if (ret)
636 return ret;
637 }
638
639 if (dp83869->io_impedance >= 0)
640 ret = phy_modify_mmd(phydev, DP83869_DEVADDR,
641 DP83869_IO_MUX_CFG,
642 DP83869_IO_MUX_CFG_IO_IMPEDANCE_CTRL,
643 dp83869->io_impedance &
644 DP83869_IO_MUX_CFG_IO_IMPEDANCE_CTRL);
645
646 return ret;
647 }
648
dp83869_configure_fiber(struct phy_device * phydev,struct dp83869_private * dp83869)649 static int dp83869_configure_fiber(struct phy_device *phydev,
650 struct dp83869_private *dp83869)
651 {
652 int bmcr;
653 int ret;
654
655 /* Only allow advertising what this PHY supports */
656 linkmode_and(phydev->advertising, phydev->advertising,
657 phydev->supported);
658
659 linkmode_set_bit(ETHTOOL_LINK_MODE_FIBRE_BIT, phydev->supported);
660
661 if (dp83869->mode == DP83869_RGMII_1000_BASE) {
662 linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT,
663 phydev->supported);
664 } else {
665 linkmode_set_bit(ETHTOOL_LINK_MODE_100baseFX_Full_BIT,
666 phydev->supported);
667 linkmode_set_bit(ETHTOOL_LINK_MODE_100baseFX_Half_BIT,
668 phydev->supported);
669
670 /* Auto neg is not supported in 100base FX mode */
671 bmcr = phy_read(phydev, MII_BMCR);
672 if (bmcr < 0)
673 return bmcr;
674
675 phydev->autoneg = AUTONEG_DISABLE;
676 linkmode_clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->supported);
677 linkmode_clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->advertising);
678
679 if (bmcr & BMCR_ANENABLE) {
680 ret = phy_modify(phydev, MII_BMCR, BMCR_ANENABLE, 0);
681 if (ret < 0)
682 return ret;
683 }
684 }
685
686 /* Update advertising from supported */
687 linkmode_or(phydev->advertising, phydev->advertising,
688 phydev->supported);
689
690 return 0;
691 }
692
dp83869_configure_mode(struct phy_device * phydev,struct dp83869_private * dp83869)693 static int dp83869_configure_mode(struct phy_device *phydev,
694 struct dp83869_private *dp83869)
695 {
696 int phy_ctrl_val;
697 int ret;
698
699 if (dp83869->mode < DP83869_RGMII_COPPER_ETHERNET ||
700 dp83869->mode > DP83869_SGMII_COPPER_ETHERNET)
701 return -EINVAL;
702
703 /* Below init sequence for each operational mode is defined in
704 * section 9.4.8 of the datasheet.
705 */
706 phy_ctrl_val = dp83869->mode;
707 if (phydev->interface == PHY_INTERFACE_MODE_MII) {
708 if (dp83869->mode == DP83869_100M_MEDIA_CONVERT ||
709 dp83869->mode == DP83869_RGMII_100_BASE ||
710 dp83869->mode == DP83869_RGMII_COPPER_ETHERNET) {
711 phy_ctrl_val |= DP83869_OP_MODE_MII;
712 } else {
713 phydev_err(phydev, "selected op-mode is not valid with MII mode\n");
714 return -EINVAL;
715 }
716 }
717
718 ret = phy_write_mmd(phydev, DP83869_DEVADDR, DP83869_OP_MODE,
719 phy_ctrl_val);
720 if (ret)
721 return ret;
722
723 ret = phy_write(phydev, MII_BMCR, MII_DP83869_BMCR_DEFAULT);
724 if (ret)
725 return ret;
726
727 phy_ctrl_val = (dp83869->rx_fifo_depth << DP83869_RX_FIFO_SHIFT |
728 dp83869->tx_fifo_depth << DP83869_TX_FIFO_SHIFT |
729 DP83869_PHY_CTRL_DEFAULT);
730
731 switch (dp83869->mode) {
732 case DP83869_RGMII_COPPER_ETHERNET:
733 ret = phy_write(phydev, MII_DP83869_PHYCTRL,
734 phy_ctrl_val);
735 if (ret)
736 return ret;
737
738 ret = phy_write(phydev, MII_CTRL1000, DP83869_CFG1_DEFAULT);
739 if (ret)
740 return ret;
741
742 ret = dp83869_configure_rgmii(phydev, dp83869);
743 if (ret)
744 return ret;
745 break;
746 case DP83869_RGMII_SGMII_BRIDGE:
747 ret = phy_modify_mmd(phydev, DP83869_DEVADDR, DP83869_OP_MODE,
748 DP83869_SGMII_RGMII_BRIDGE,
749 DP83869_SGMII_RGMII_BRIDGE);
750 if (ret)
751 return ret;
752
753 ret = phy_write_mmd(phydev, DP83869_DEVADDR,
754 DP83869_FX_CTRL, DP83869_FX_CTRL_DEFAULT);
755 if (ret)
756 return ret;
757
758 break;
759 case DP83869_1000M_MEDIA_CONVERT:
760 ret = phy_write(phydev, MII_DP83869_PHYCTRL,
761 phy_ctrl_val);
762 if (ret)
763 return ret;
764
765 ret = phy_write_mmd(phydev, DP83869_DEVADDR,
766 DP83869_FX_CTRL, DP83869_FX_CTRL_DEFAULT);
767 if (ret)
768 return ret;
769 break;
770 case DP83869_100M_MEDIA_CONVERT:
771 ret = phy_write(phydev, MII_DP83869_PHYCTRL,
772 phy_ctrl_val);
773 if (ret)
774 return ret;
775 break;
776 case DP83869_SGMII_COPPER_ETHERNET:
777 ret = phy_write(phydev, MII_DP83869_PHYCTRL,
778 phy_ctrl_val);
779 if (ret)
780 return ret;
781
782 ret = phy_write(phydev, MII_CTRL1000, DP83869_CFG1_DEFAULT);
783 if (ret)
784 return ret;
785
786 ret = phy_write_mmd(phydev, DP83869_DEVADDR,
787 DP83869_FX_CTRL, DP83869_FX_CTRL_DEFAULT);
788 if (ret)
789 return ret;
790
791 break;
792 case DP83869_RGMII_1000_BASE:
793 case DP83869_RGMII_100_BASE:
794 ret = dp83869_configure_fiber(phydev, dp83869);
795 break;
796 default:
797 return -EINVAL;
798 }
799
800 return ret;
801 }
802
dp83869_config_init(struct phy_device * phydev)803 static int dp83869_config_init(struct phy_device *phydev)
804 {
805 struct dp83869_private *dp83869 = phydev->priv;
806 int ret, val;
807
808 /* Force speed optimization for the PHY even if it strapped */
809 ret = phy_modify(phydev, DP83869_CFG2, DP83869_DOWNSHIFT_EN,
810 DP83869_DOWNSHIFT_EN);
811 if (ret)
812 return ret;
813
814 ret = dp83869_configure_mode(phydev, dp83869);
815 if (ret)
816 return ret;
817
818 /* Enable Interrupt output INT_OE in CFG4 register */
819 if (phy_interrupt_is_valid(phydev)) {
820 val = phy_read(phydev, DP83869_CFG4);
821 val |= DP83869_INT_OE;
822 phy_write(phydev, DP83869_CFG4, val);
823 }
824
825 if (dp83869->port_mirroring != DP83869_PORT_MIRRORING_KEEP)
826 dp83869_config_port_mirroring(phydev);
827
828 /* Clock output selection if muxing property is set */
829 if (dp83869->clk_output_sel != DP83869_CLK_O_SEL_REF_CLK)
830 ret = phy_modify_mmd(phydev,
831 DP83869_DEVADDR, DP83869_IO_MUX_CFG,
832 DP83869_IO_MUX_CFG_CLK_O_SEL_MASK,
833 dp83869->clk_output_sel <<
834 DP83869_IO_MUX_CFG_CLK_O_SEL_SHIFT);
835
836 if (phy_interface_is_rgmii(phydev)) {
837 ret = phy_write_mmd(phydev, DP83869_DEVADDR, DP83869_RGMIIDCTL,
838 dp83869->rx_int_delay |
839 dp83869->tx_int_delay << DP83869_RGMII_CLK_DELAY_SHIFT);
840 if (ret)
841 return ret;
842
843 val = phy_read_mmd(phydev, DP83869_DEVADDR, DP83869_RGMIICTL);
844 val |= (DP83869_RGMII_TX_CLK_DELAY_EN |
845 DP83869_RGMII_RX_CLK_DELAY_EN);
846
847 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID)
848 val &= ~(DP83869_RGMII_TX_CLK_DELAY_EN |
849 DP83869_RGMII_RX_CLK_DELAY_EN);
850
851 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID)
852 val &= ~DP83869_RGMII_TX_CLK_DELAY_EN;
853
854 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID)
855 val &= ~DP83869_RGMII_RX_CLK_DELAY_EN;
856
857 ret = phy_write_mmd(phydev, DP83869_DEVADDR, DP83869_RGMIICTL,
858 val);
859 }
860
861 return ret;
862 }
863
dp83869_probe(struct phy_device * phydev)864 static int dp83869_probe(struct phy_device *phydev)
865 {
866 struct dp83869_private *dp83869;
867 int ret;
868
869 dp83869 = devm_kzalloc(&phydev->mdio.dev, sizeof(*dp83869),
870 GFP_KERNEL);
871 if (!dp83869)
872 return -ENOMEM;
873
874 phydev->priv = dp83869;
875
876 ret = dp83869_of_init(phydev);
877 if (ret)
878 return ret;
879
880 if (dp83869->mode == DP83869_RGMII_100_BASE ||
881 dp83869->mode == DP83869_RGMII_1000_BASE)
882 phydev->port = PORT_FIBRE;
883
884 return dp83869_config_init(phydev);
885 }
886
dp83869_phy_reset(struct phy_device * phydev)887 static int dp83869_phy_reset(struct phy_device *phydev)
888 {
889 int ret;
890
891 ret = phy_write(phydev, DP83869_CTRL, DP83869_SW_RESET);
892 if (ret < 0)
893 return ret;
894
895 usleep_range(10, 20);
896
897 /* Global sw reset sets all registers to default.
898 * Need to set the registers in the PHY to the right config.
899 */
900 return dp83869_config_init(phydev);
901 }
902
903
904 #define DP83869_PHY_DRIVER(_id, _name) \
905 { \
906 PHY_ID_MATCH_MODEL(_id), \
907 .name = (_name), \
908 .probe = dp83869_probe, \
909 .config_init = dp83869_config_init, \
910 .soft_reset = dp83869_phy_reset, \
911 .config_intr = dp83869_config_intr, \
912 .handle_interrupt = dp83869_handle_interrupt, \
913 .config_aneg = dp83869_config_aneg, \
914 .read_status = dp83869_read_status, \
915 .get_tunable = dp83869_get_tunable, \
916 .set_tunable = dp83869_set_tunable, \
917 .get_wol = dp83869_get_wol, \
918 .set_wol = dp83869_set_wol, \
919 .suspend = genphy_suspend, \
920 .resume = genphy_resume, \
921 }
922
923 static struct phy_driver dp83869_driver[] = {
924 DP83869_PHY_DRIVER(DP83869_PHY_ID, "TI DP83869"),
925 DP83869_PHY_DRIVER(DP83561_PHY_ID, "TI DP83561-SP"),
926
927 };
928 module_phy_driver(dp83869_driver);
929
930 static const struct mdio_device_id __maybe_unused dp83869_tbl[] = {
931 { PHY_ID_MATCH_MODEL(DP83869_PHY_ID) },
932 { PHY_ID_MATCH_MODEL(DP83561_PHY_ID) },
933 { }
934 };
935 MODULE_DEVICE_TABLE(mdio, dp83869_tbl);
936
937 MODULE_DESCRIPTION("Texas Instruments DP83869 PHY driver");
938 MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com");
939 MODULE_LICENSE("GPL v2");
940