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