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11#include <linux/bitfield.h>
12#include <linux/clk.h>
13#include <linux/kernel.h>
14#include <linux/mfd/syscon.h>
15#include <linux/module.h>
16#include <linux/phy/phy.h>
17#include <linux/platform_device.h>
18#include <linux/regmap.h>
19
20#define SCTRL_SCDEEPSLEEPED (0x0)
21#define USB_CLK_SELECTED BIT(20)
22
23#define PERI_CRG_PEREN0 (0x00)
24#define PERI_CRG_PERDIS0 (0x04)
25#define PERI_CRG_PEREN4 (0x40)
26#define PERI_CRG_PERDIS4 (0x44)
27#define PERI_CRG_PERRSTEN4 (0x90)
28#define PERI_CRG_PERRSTDIS4 (0x94)
29#define PERI_CRG_ISODIS (0x148)
30#define PERI_CRG_PEREN6 (0x410)
31#define PERI_CRG_PERDIS6 (0x414)
32
33#define USB_REFCLK_ISO_EN BIT(25)
34
35#define GT_CLK_USB2PHY_REF BIT(19)
36
37#define PCTRL_PERI_CTRL3 (0x10)
38#define PCTRL_PERI_CTRL3_MSK_START (16)
39#define USB_TCXO_EN BIT(1)
40
41#define PCTRL_PERI_CTRL24 (0x64)
42#define SC_CLK_USB3PHY_3MUX1_SEL BIT(25)
43
44#define USB3OTG_CTRL0 (0x00)
45#define USB3OTG_CTRL3 (0x0c)
46#define USB3OTG_CTRL4 (0x10)
47#define USB3OTG_CTRL5 (0x14)
48#define USB3OTG_CTRL7 (0x1c)
49#define USB_MISC_CFG50 (0x50)
50#define USB_MISC_CFG54 (0x54)
51#define USB_MISC_CFG58 (0x58)
52#define USB_MISC_CFG5C (0x5c)
53#define USB_MISC_CFGA0 (0xa0)
54#define TCA_CLK_RST (0x200)
55#define TCA_INTR_EN (0x204)
56#define TCA_INTR_STS (0x208)
57#define TCA_GCFG (0x210)
58#define TCA_TCPC (0x214)
59#define TCA_SYSMODE_CFG (0x218)
60#define TCA_VBUS_CTRL (0x240)
61
62#define CTRL0_USB3_VBUSVLD BIT(7)
63#define CTRL0_USB3_VBUSVLD_SEL BIT(6)
64
65#define CTRL3_USB2_VBUSVLDEXT0 BIT(6)
66#define CTRL3_USB2_VBUSVLDEXTSEL0 BIT(5)
67
68#define CTRL5_USB2_SIDDQ BIT(0)
69
70#define CTRL7_USB2_REFCLKSEL_MASK GENMASK(4, 3)
71#define CTRL7_USB2_REFCLKSEL_ABB (BIT(4) | BIT(3))
72#define CTRL7_USB2_REFCLKSEL_PAD BIT(4)
73
74#define CFG50_USB3_PHY_TEST_POWERDOWN BIT(23)
75
76#define CFG54_USB31PHY_CR_ADDR_MASK GENMASK(31, 16)
77
78#define CFG54_USB3PHY_REF_USE_PAD BIT(12)
79#define CFG54_PHY0_PMA_PWR_STABLE BIT(11)
80#define CFG54_PHY0_PCS_PWR_STABLE BIT(9)
81#define CFG54_USB31PHY_CR_ACK BIT(7)
82#define CFG54_USB31PHY_CR_WR_EN BIT(5)
83#define CFG54_USB31PHY_CR_SEL BIT(4)
84#define CFG54_USB31PHY_CR_RD_EN BIT(3)
85#define CFG54_USB31PHY_CR_CLK BIT(2)
86#define CFG54_USB3_PHY0_ANA_PWR_EN BIT(1)
87
88#define CFG58_USB31PHY_CR_DATA_MASK GENMASK(31, 16)
89
90#define CFG5C_USB3_PHY0_SS_MPLLA_SSC_EN BIT(1)
91
92#define CFGA0_VAUX_RESET BIT(9)
93#define CFGA0_USB31C_RESET BIT(8)
94#define CFGA0_USB2PHY_REFCLK_SELECT BIT(4)
95#define CFGA0_USB3PHY_RESET BIT(1)
96#define CFGA0_USB2PHY_POR BIT(0)
97
98#define INTR_EN_XA_TIMEOUT_EVT_EN BIT(1)
99#define INTR_EN_XA_ACK_EVT_EN BIT(0)
100
101#define CLK_RST_TCA_REF_CLK_EN BIT(1)
102#define CLK_RST_SUSPEND_CLK_EN BIT(0)
103
104#define GCFG_ROLE_HSTDEV BIT(4)
105#define GCFG_OP_MODE GENMASK(1, 0)
106#define GCFG_OP_MODE_CTRL_SYNC_MODE BIT(0)
107
108#define TCPC_VALID BIT(4)
109#define TCPC_LOW_POWER_EN BIT(3)
110#define TCPC_MUX_CONTROL_MASK GENMASK(1, 0)
111#define TCPC_MUX_CONTROL_USB31 BIT(0)
112
113#define SYSMODE_CFG_TYPEC_DISABLE BIT(3)
114
115#define VBUS_CTRL_POWERPRESENT_OVERRD GENMASK(3, 2)
116#define VBUS_CTRL_VBUSVALID_OVERRD GENMASK(1, 0)
117
118#define KIRIN970_USB_DEFAULT_PHY_PARAM (0xfdfee4)
119#define KIRIN970_USB_DEFAULT_PHY_VBOOST (0x5)
120
121#define TX_VBOOST_LVL_REG (0xf)
122#define TX_VBOOST_LVL_START (6)
123#define TX_VBOOST_LVL_ENABLE BIT(9)
124
125struct hi3670_priv {
126 struct device *dev;
127 struct regmap *peri_crg;
128 struct regmap *pctrl;
129 struct regmap *sctrl;
130 struct regmap *usb31misc;
131
132 u32 eye_diagram_param;
133 u32 tx_vboost_lvl;
134
135 u32 peri_crg_offset;
136 u32 pctrl_offset;
137 u32 usb31misc_offset;
138};
139
140static int hi3670_phy_cr_clk(struct regmap *usb31misc)
141{
142 int ret;
143
144
145 ret = regmap_update_bits(usb31misc, USB_MISC_CFG54,
146 CFG54_USB31PHY_CR_CLK, CFG54_USB31PHY_CR_CLK);
147 if (ret)
148 return ret;
149
150
151 return regmap_update_bits(usb31misc, USB_MISC_CFG54,
152 CFG54_USB31PHY_CR_CLK, 0);
153}
154
155static int hi3670_phy_cr_set_sel(struct regmap *usb31misc)
156{
157 return regmap_update_bits(usb31misc, USB_MISC_CFG54,
158 CFG54_USB31PHY_CR_SEL, CFG54_USB31PHY_CR_SEL);
159}
160
161static int hi3670_phy_cr_start(struct regmap *usb31misc, int direction)
162{
163 int ret, reg;
164
165 if (direction)
166 reg = CFG54_USB31PHY_CR_WR_EN;
167 else
168 reg = CFG54_USB31PHY_CR_RD_EN;
169
170 ret = regmap_update_bits(usb31misc, USB_MISC_CFG54, reg, reg);
171
172 if (ret)
173 return ret;
174
175 ret = hi3670_phy_cr_clk(usb31misc);
176 if (ret)
177 return ret;
178
179 return regmap_update_bits(usb31misc, USB_MISC_CFG54,
180 CFG54_USB31PHY_CR_RD_EN | CFG54_USB31PHY_CR_WR_EN, 0);
181}
182
183static int hi3670_phy_cr_wait_ack(struct regmap *usb31misc)
184{
185 u32 reg;
186 int retry = 10;
187 int ret;
188
189 while (retry-- > 0) {
190 ret = regmap_read(usb31misc, USB_MISC_CFG54, ®);
191 if (ret)
192 return ret;
193 if ((reg & CFG54_USB31PHY_CR_ACK) == CFG54_USB31PHY_CR_ACK)
194 return 0;
195
196 ret = hi3670_phy_cr_clk(usb31misc);
197 if (ret)
198 return ret;
199
200 usleep_range(10, 20);
201 }
202
203 return -ETIMEDOUT;
204}
205
206static int hi3670_phy_cr_set_addr(struct regmap *usb31misc, u32 addr)
207{
208 u32 reg;
209 int ret;
210
211 ret = regmap_read(usb31misc, USB_MISC_CFG54, ®);
212 if (ret)
213 return ret;
214
215 reg = FIELD_PREP(CFG54_USB31PHY_CR_ADDR_MASK, addr);
216
217 return regmap_update_bits(usb31misc, USB_MISC_CFG54,
218 CFG54_USB31PHY_CR_ADDR_MASK, reg);
219}
220
221static int hi3670_phy_cr_read(struct regmap *usb31misc, u32 addr, u32 *val)
222{
223 int reg, i, ret;
224
225 for (i = 0; i < 100; i++) {
226 ret = hi3670_phy_cr_clk(usb31misc);
227 if (ret)
228 return ret;
229 }
230
231 ret = hi3670_phy_cr_set_sel(usb31misc);
232 if (ret)
233 return ret;
234
235 ret = hi3670_phy_cr_set_addr(usb31misc, addr);
236 if (ret)
237 return ret;
238
239 ret = hi3670_phy_cr_start(usb31misc, 0);
240 if (ret)
241 return ret;
242
243 ret = hi3670_phy_cr_wait_ack(usb31misc);
244 if (ret)
245 return ret;
246
247 ret = regmap_read(usb31misc, USB_MISC_CFG58, ®);
248 if (ret)
249 return ret;
250
251 *val = FIELD_GET(CFG58_USB31PHY_CR_DATA_MASK, reg);
252
253 return 0;
254}
255
256static int hi3670_phy_cr_write(struct regmap *usb31misc, u32 addr, u32 val)
257{
258 int i;
259 int ret;
260
261 for (i = 0; i < 100; i++) {
262 ret = hi3670_phy_cr_clk(usb31misc);
263 if (ret)
264 return ret;
265 }
266
267 ret = hi3670_phy_cr_set_sel(usb31misc);
268 if (ret)
269 return ret;
270
271 ret = hi3670_phy_cr_set_addr(usb31misc, addr);
272 if (ret)
273 return ret;
274
275 ret = regmap_write(usb31misc, USB_MISC_CFG58,
276 FIELD_PREP(CFG58_USB31PHY_CR_DATA_MASK, val));
277 if (ret)
278 return ret;
279
280 ret = hi3670_phy_cr_start(usb31misc, 1);
281 if (ret)
282 return ret;
283
284 return hi3670_phy_cr_wait_ack(usb31misc);
285}
286
287static int hi3670_phy_set_params(struct hi3670_priv *priv)
288{
289 u32 reg;
290 int ret;
291 int retry = 3;
292
293 ret = regmap_write(priv->usb31misc, USB3OTG_CTRL4,
294 priv->eye_diagram_param);
295 if (ret) {
296 dev_err(priv->dev, "set USB3OTG_CTRL4 failed\n");
297 return ret;
298 }
299
300 while (retry-- > 0) {
301 ret = hi3670_phy_cr_read(priv->usb31misc,
302 TX_VBOOST_LVL_REG, ®);
303 if (!ret)
304 break;
305
306 if (ret != -ETIMEDOUT) {
307 dev_err(priv->dev, "read TX_VBOOST_LVL_REG failed\n");
308 return ret;
309 }
310 }
311 if (ret)
312 return ret;
313
314 reg |= (TX_VBOOST_LVL_ENABLE | (priv->tx_vboost_lvl << TX_VBOOST_LVL_START));
315 ret = hi3670_phy_cr_write(priv->usb31misc, TX_VBOOST_LVL_REG, reg);
316 if (ret)
317 dev_err(priv->dev, "write TX_VBOOST_LVL_REG failed\n");
318
319 return ret;
320}
321
322static bool hi3670_is_abbclk_selected(struct hi3670_priv *priv)
323{
324 u32 reg;
325
326 if (!priv->sctrl) {
327 dev_err(priv->dev, "priv->sctrl is null!\n");
328 return false;
329 }
330
331 if (regmap_read(priv->sctrl, SCTRL_SCDEEPSLEEPED, ®)) {
332 dev_err(priv->dev, "SCTRL_SCDEEPSLEEPED read failed!\n");
333 return false;
334 }
335
336 if ((reg & USB_CLK_SELECTED) == 0)
337 return false;
338
339 return true;
340}
341
342static int hi3670_config_phy_clock(struct hi3670_priv *priv)
343{
344 u32 val, mask;
345 int ret;
346
347 if (!hi3670_is_abbclk_selected(priv)) {
348
349 ret = regmap_write(priv->peri_crg, PERI_CRG_ISODIS,
350 USB_REFCLK_ISO_EN);
351 if (ret)
352 goto out;
353
354
355 ret = regmap_write(priv->pctrl, PCTRL_PERI_CTRL3,
356 USB_TCXO_EN |
357 (USB_TCXO_EN << PCTRL_PERI_CTRL3_MSK_START));
358
359
360 mask = SC_CLK_USB3PHY_3MUX1_SEL;
361 ret = regmap_update_bits(priv->pctrl,
362 PCTRL_PERI_CTRL24, mask, 0);
363 if (ret)
364 goto out;
365
366 ret = regmap_update_bits(priv->usb31misc, USB_MISC_CFGA0,
367 CFGA0_USB2PHY_REFCLK_SELECT, 0);
368 if (ret)
369 goto out;
370
371 ret = regmap_read(priv->usb31misc, USB3OTG_CTRL7, &val);
372 if (ret)
373 goto out;
374 val &= ~CTRL7_USB2_REFCLKSEL_MASK;
375 val |= CTRL7_USB2_REFCLKSEL_ABB;
376 ret = regmap_write(priv->usb31misc, USB3OTG_CTRL7, val);
377 if (ret)
378 goto out;
379
380 return 0;
381 }
382
383 ret = regmap_update_bits(priv->usb31misc, USB_MISC_CFG54,
384 CFG54_USB3PHY_REF_USE_PAD,
385 CFG54_USB3PHY_REF_USE_PAD);
386 if (ret)
387 goto out;
388
389 ret = regmap_update_bits(priv->usb31misc, USB_MISC_CFGA0,
390 CFGA0_USB2PHY_REFCLK_SELECT,
391 CFGA0_USB2PHY_REFCLK_SELECT);
392 if (ret)
393 goto out;
394
395 ret = regmap_read(priv->usb31misc, USB3OTG_CTRL7, &val);
396 if (ret)
397 goto out;
398 val &= ~CTRL7_USB2_REFCLKSEL_MASK;
399 val |= CTRL7_USB2_REFCLKSEL_PAD;
400 ret = regmap_write(priv->usb31misc, USB3OTG_CTRL7, val);
401 if (ret)
402 goto out;
403
404 ret = regmap_write(priv->peri_crg,
405 PERI_CRG_PEREN6, GT_CLK_USB2PHY_REF);
406 if (ret)
407 goto out;
408
409 return 0;
410out:
411 dev_err(priv->dev, "failed to config phy clock ret: %d\n", ret);
412 return ret;
413}
414
415static int hi3670_config_tca(struct hi3670_priv *priv)
416{
417 u32 val, mask;
418 int ret;
419
420 ret = regmap_write(priv->usb31misc, TCA_INTR_STS, 0xffff);
421 if (ret)
422 goto out;
423
424 ret = regmap_write(priv->usb31misc, TCA_INTR_EN,
425 INTR_EN_XA_TIMEOUT_EVT_EN | INTR_EN_XA_ACK_EVT_EN);
426 if (ret)
427 goto out;
428
429 mask = CLK_RST_TCA_REF_CLK_EN | CLK_RST_SUSPEND_CLK_EN;
430 ret = regmap_update_bits(priv->usb31misc, TCA_CLK_RST, mask, 0);
431 if (ret)
432 goto out;
433
434 ret = regmap_update_bits(priv->usb31misc, TCA_GCFG,
435 GCFG_ROLE_HSTDEV | GCFG_OP_MODE,
436 GCFG_ROLE_HSTDEV | GCFG_OP_MODE_CTRL_SYNC_MODE);
437 if (ret)
438 goto out;
439
440 ret = regmap_update_bits(priv->usb31misc, TCA_SYSMODE_CFG,
441 SYSMODE_CFG_TYPEC_DISABLE, 0);
442 if (ret)
443 goto out;
444
445 ret = regmap_read(priv->usb31misc, TCA_TCPC, &val);
446 if (ret)
447 goto out;
448 val &= ~(TCPC_VALID | TCPC_LOW_POWER_EN | TCPC_MUX_CONTROL_MASK);
449 val |= (TCPC_VALID | TCPC_MUX_CONTROL_USB31);
450 ret = regmap_write(priv->usb31misc, TCA_TCPC, val);
451 if (ret)
452 goto out;
453
454 ret = regmap_write(priv->usb31misc, TCA_VBUS_CTRL,
455 VBUS_CTRL_POWERPRESENT_OVERRD | VBUS_CTRL_VBUSVALID_OVERRD);
456 if (ret)
457 goto out;
458
459 return 0;
460out:
461 dev_err(priv->dev, "failed to config phy clock ret: %d\n", ret);
462 return ret;
463}
464
465static int hi3670_phy_init(struct phy *phy)
466{
467 struct hi3670_priv *priv = phy_get_drvdata(phy);
468 u32 val;
469 int ret;
470
471
472 val = CFGA0_VAUX_RESET | CFGA0_USB31C_RESET |
473 CFGA0_USB3PHY_RESET | CFGA0_USB2PHY_POR;
474 ret = regmap_update_bits(priv->usb31misc, USB_MISC_CFGA0, val, 0);
475 if (ret)
476 goto out;
477
478 ret = hi3670_config_phy_clock(priv);
479 if (ret)
480 goto out;
481
482
483 ret = regmap_update_bits(priv->usb31misc, USB3OTG_CTRL5,
484 CTRL5_USB2_SIDDQ, 0);
485 if (ret)
486 goto out;
487
488
489 ret = regmap_update_bits(priv->usb31misc, USB_MISC_CFG50,
490 CFG50_USB3_PHY_TEST_POWERDOWN, 0);
491 if (ret)
492 goto out;
493
494
495 val = CFGA0_USB3PHY_RESET | CFGA0_USB2PHY_POR;
496 ret = regmap_update_bits(priv->usb31misc, USB_MISC_CFGA0, val, val);
497 if (ret)
498 goto out;
499
500 usleep_range(100, 120);
501
502
503 val = CFG54_USB3_PHY0_ANA_PWR_EN | CFG54_PHY0_PCS_PWR_STABLE |
504 CFG54_PHY0_PMA_PWR_STABLE;
505 ret = regmap_update_bits(priv->usb31misc, USB_MISC_CFG54,
506 val, val);
507 if (ret)
508 goto out;
509
510 ret = hi3670_config_tca(priv);
511 if (ret)
512 goto out;
513
514
515 ret = regmap_update_bits(priv->usb31misc, USB_MISC_CFG5C,
516 CFG5C_USB3_PHY0_SS_MPLLA_SSC_EN,
517 CFG5C_USB3_PHY0_SS_MPLLA_SSC_EN);
518 if (ret)
519 goto out;
520
521
522 val = CFGA0_VAUX_RESET | CFGA0_USB31C_RESET;
523 ret = regmap_update_bits(priv->usb31misc, USB_MISC_CFGA0, val, val);
524 if (ret)
525 goto out;
526
527 usleep_range(100, 120);
528
529
530 val = CTRL0_USB3_VBUSVLD | CTRL0_USB3_VBUSVLD_SEL;
531 ret = regmap_update_bits(priv->usb31misc, USB3OTG_CTRL0, val, val);
532 if (ret)
533 goto out;
534
535 val = CTRL3_USB2_VBUSVLDEXT0 | CTRL3_USB2_VBUSVLDEXTSEL0;
536 ret = regmap_update_bits(priv->usb31misc, USB3OTG_CTRL3, val, val);
537 if (ret)
538 goto out;
539
540 usleep_range(100, 120);
541
542 ret = hi3670_phy_set_params(priv);
543 if (ret)
544 goto out;
545
546 return 0;
547out:
548 dev_err(priv->dev, "failed to init phy ret: %d\n", ret);
549 return ret;
550}
551
552static int hi3670_phy_exit(struct phy *phy)
553{
554 struct hi3670_priv *priv = phy_get_drvdata(phy);
555 u32 mask;
556 int ret;
557
558
559 mask = CFGA0_USB3PHY_RESET | CFGA0_USB2PHY_POR;
560 ret = regmap_update_bits(priv->usb31misc, USB_MISC_CFGA0, mask, 0);
561 if (ret)
562 goto out;
563
564 if (!hi3670_is_abbclk_selected(priv)) {
565
566 ret = regmap_write(priv->pctrl, PCTRL_PERI_CTRL3,
567 USB_TCXO_EN << PCTRL_PERI_CTRL3_MSK_START);
568 } else {
569 ret = regmap_write(priv->peri_crg, PERI_CRG_PERDIS6,
570 GT_CLK_USB2PHY_REF);
571 if (ret)
572 goto out;
573 }
574
575 return 0;
576out:
577 dev_err(priv->dev, "failed to exit phy ret: %d\n", ret);
578 return ret;
579}
580
581static const struct phy_ops hi3670_phy_ops = {
582 .init = hi3670_phy_init,
583 .exit = hi3670_phy_exit,
584 .owner = THIS_MODULE,
585};
586
587static int hi3670_phy_probe(struct platform_device *pdev)
588{
589 struct phy_provider *phy_provider;
590 struct device *dev = &pdev->dev;
591 struct phy *phy;
592 struct hi3670_priv *priv;
593
594 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
595 if (!priv)
596 return -ENOMEM;
597
598 priv->dev = dev;
599 priv->peri_crg = syscon_regmap_lookup_by_phandle(dev->of_node,
600 "hisilicon,pericrg-syscon");
601 if (IS_ERR(priv->peri_crg)) {
602 dev_err(dev, "no hisilicon,pericrg-syscon\n");
603 return PTR_ERR(priv->peri_crg);
604 }
605
606 priv->pctrl = syscon_regmap_lookup_by_phandle(dev->of_node,
607 "hisilicon,pctrl-syscon");
608 if (IS_ERR(priv->pctrl)) {
609 dev_err(dev, "no hisilicon,pctrl-syscon\n");
610 return PTR_ERR(priv->pctrl);
611 }
612
613 priv->sctrl = syscon_regmap_lookup_by_phandle(dev->of_node,
614 "hisilicon,sctrl-syscon");
615 if (IS_ERR(priv->sctrl)) {
616 dev_err(dev, "no hisilicon,sctrl-syscon\n");
617 return PTR_ERR(priv->sctrl);
618 }
619
620
621 priv->usb31misc = syscon_node_to_regmap(dev->parent->of_node);
622 if (IS_ERR(priv->usb31misc)) {
623 dev_err(dev, "no hisilicon,usb3-otg-bc-syscon\n");
624 return PTR_ERR(priv->usb31misc);
625 }
626
627 if (of_property_read_u32(dev->of_node, "hisilicon,eye-diagram-param",
628 &priv->eye_diagram_param))
629 priv->eye_diagram_param = KIRIN970_USB_DEFAULT_PHY_PARAM;
630
631 if (of_property_read_u32(dev->of_node, "hisilicon,tx-vboost-lvl",
632 &priv->tx_vboost_lvl))
633 priv->tx_vboost_lvl = KIRIN970_USB_DEFAULT_PHY_VBOOST;
634
635 phy = devm_phy_create(dev, NULL, &hi3670_phy_ops);
636 if (IS_ERR(phy))
637 return PTR_ERR(phy);
638
639 phy_set_drvdata(phy, priv);
640 phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
641 return PTR_ERR_OR_ZERO(phy_provider);
642}
643
644static const struct of_device_id hi3670_phy_of_match[] = {
645 { .compatible = "hisilicon,hi3670-usb-phy" },
646 { },
647};
648MODULE_DEVICE_TABLE(of, hi3670_phy_of_match);
649
650static struct platform_driver hi3670_phy_driver = {
651 .probe = hi3670_phy_probe,
652 .driver = {
653 .name = "hi3670-usb-phy",
654 .of_match_table = hi3670_phy_of_match,
655 }
656};
657module_platform_driver(hi3670_phy_driver);
658
659MODULE_AUTHOR("Yu Chen <chenyu56@huawei.com>");
660MODULE_LICENSE("GPL v2");
661MODULE_DESCRIPTION("Hilisicon Kirin970 USB31 PHY Driver");
662
