1// SPDX-License-Identifier: GPL-2.0
2
3#include <linux/bitfield.h>
4#include <linux/completion.h>
5#include <linux/i2c.h>
6#include <linux/interrupt.h>
7#include <linux/kernel.h>
8#include <linux/module.h>
9#include <linux/power_supply.h>
10#include <linux/regmap.h>
11#include <linux/usb/pd.h>
12#include <linux/usb/role.h>
13#include <linux/usb/typec.h>
14
15#define RT1719_REG_TXCTRL1 0x03
16#define RT1719_REG_TXCTRL2 0x04
17#define RT1719_REG_POLICYINFO 0x0E
18#define RT1719_REG_SRCPDO1 0x11
19#define RT1719_REG_MASKS 0x2D
20#define RT1719_REG_EVENTS 0x33
21#define RT1719_REG_STATS 0x37
22#define RT1719_REG_PSELINFO 0x3C
23#define RT1719_REG_USBSETINFO 0x3E
24#define RT1719_REG_VENID 0x82
25
26#define RT1719_UNIQUE_PID 0x1719
27#define RT1719_REQDRSWAP_MASK BIT(7)
28#define RT1719_EVALMODE_MASK BIT(4)
29#define RT1719_REQSRCPDO_MASK GENMASK(2, 0)
30#define RT1719_TXSPDOREQ_MASK BIT(7)
31#define RT1719_INT_DRSW_ACCEPT BIT(23)
32#define RT1719_INT_RX_SRCCAP BIT(21)
33#define RT1719_INT_VBUS_DCT BIT(6)
34#define RT1719_INT_VBUS_PRESENT BIT(5)
35#define RT1719_INT_PE_SNK_RDY BIT(2)
36#define RT1719_CC1_STAT GENMASK(9, 8)
37#define RT1719_CC2_STAT GENMASK(11, 10)
38#define RT1719_POLARITY_MASK BIT(23)
39#define RT1719_DATAROLE_MASK BIT(22)
40#define RT1719_PDSPECREV_MASK GENMASK(21, 20)
41#define RT1719_SPDOSEL_MASK GENMASK(18, 16)
42#define RT1719_SPDONUM_MASK GENMASK(15, 13)
43#define RT1719_ATTACH_VBUS BIT(12)
44#define RT1719_ATTACH_DBG BIT(10)
45#define RT1719_ATTACH_SNK BIT(9)
46#define RT1719_ATTACHDEV_MASK (RT1719_ATTACH_VBUS | RT1719_ATTACH_DBG | \
47 RT1719_ATTACH_SNK)
48#define RT1719_PE_EXP_CONTRACT BIT(2)
49#define RT1719_PSEL_SUPPORT BIT(15)
50#define RT1719_TBLSEL_MASK BIT(6)
51#define RT1719_LATPSEL_MASK GENMASK(5, 0)
52#define RT1719_USBINFO_MASK GENMASK(1, 0)
53#define RT1719_USB_DFPUFP 3
54#define RT1719_MAX_SRCPDO 7
55
56enum {
57 SNK_PWR_OPEN = 0,
58 SNK_PWR_DEF,
59 SNK_PWR_1P5A,
60 SNK_PWR_3A
61};
62
63enum {
64 USBPD_SPECREV_1_0 = 0,
65 USBPD_SPECREV_2_0,
66 USBPD_SPECREV_3_0
67};
68
69enum rt1719_snkcap {
70 RT1719_SNKCAP_5V = 0,
71 RT1719_SNKCAP_9V,
72 RT1719_SNKCAP_12V,
73 RT1719_SNKCAP_15V,
74 RT1719_SNKCAP_20V,
75 RT1719_MAX_SNKCAP
76};
77
78struct rt1719_psel_cap {
79 u8 lomask;
80 u8 himask;
81 u32 milliwatt;
82 u32 milliamp;
83};
84
85struct rt1719_data {
86 struct device *dev;
87 struct regmap *regmap;
88 struct typec_port *port;
89 struct usb_role_switch *role_sw;
90 struct power_supply *psy;
91 struct typec_partner *partner;
92 struct power_supply_desc psy_desc;
93 struct usb_pd_identity partner_ident;
94 struct typec_partner_desc partner_desc;
95 struct completion req_completion;
96 enum power_supply_usb_type usb_type;
97 bool attached;
98 bool pd_capable;
99 bool drswap_support;
100 u32 voltage;
101 u32 req_voltage;
102 u32 max_current;
103 u32 op_current;
104 u32 spdos[RT1719_MAX_SRCPDO];
105 u16 snkcaps[RT1719_MAX_SNKCAP];
106 int spdo_num;
107 int spdo_sel;
108 u32 conn_info;
109 u16 conn_stat;
110};
111
112static const enum power_supply_property rt1719_psy_properties[] = {
113 POWER_SUPPLY_PROP_ONLINE,
114 POWER_SUPPLY_PROP_USB_TYPE,
115 POWER_SUPPLY_PROP_VOLTAGE_NOW,
116 POWER_SUPPLY_PROP_CURRENT_MAX,
117 POWER_SUPPLY_PROP_CURRENT_NOW
118};
119
120static int rt1719_read16(struct rt1719_data *data, unsigned int reg, u16 *val)
121{
122 __le16 regval;
123 int ret;
124
125 ret = regmap_raw_read(map: data->regmap, reg, val: &regval, val_len: sizeof(regval));
126 if (ret)
127 return ret;
128
129 *val = le16_to_cpu(regval);
130 return 0;
131}
132
133static int rt1719_read32(struct rt1719_data *data, unsigned int reg, u32 *val)
134{
135 __le32 regval;
136 int ret;
137
138 ret = regmap_raw_read(map: data->regmap, reg, val: &regval, val_len: sizeof(regval));
139 if (ret)
140 return ret;
141
142 *val = le32_to_cpu(regval);
143 return 0;
144}
145
146static int rt1719_write32(struct rt1719_data *data, unsigned int reg, u32 val)
147{
148 __le32 regval = cpu_to_le32(val);
149
150 return regmap_raw_write(map: data->regmap, reg, val: &regval, val_len: sizeof(regval));
151}
152
153static enum typec_pwr_opmode rt1719_get_pwr_opmode(u32 conn, u16 stat)
154{
155 u16 cc1, cc2, cc_stat;
156
157 cc1 = FIELD_GET(RT1719_CC1_STAT, stat);
158 cc2 = FIELD_GET(RT1719_CC2_STAT, stat);
159
160 if (conn & RT1719_ATTACH_SNK) {
161 if (conn & RT1719_POLARITY_MASK)
162 cc_stat = cc2;
163 else
164 cc_stat = cc1;
165
166 switch (cc_stat) {
167 case SNK_PWR_3A:
168 return TYPEC_PWR_MODE_3_0A;
169 case SNK_PWR_1P5A:
170 return TYPEC_PWR_MODE_1_5A;
171 }
172 } else if (conn & RT1719_ATTACH_DBG) {
173 if ((cc1 == SNK_PWR_1P5A && cc2 == SNK_PWR_DEF) ||
174 (cc1 == SNK_PWR_DEF && cc2 == SNK_PWR_1P5A))
175 return TYPEC_PWR_MODE_1_5A;
176 else if ((cc1 == SNK_PWR_3A && cc2 == SNK_PWR_DEF) ||
177 (cc1 == SNK_PWR_DEF && cc2 == SNK_PWR_3A))
178 return TYPEC_PWR_MODE_3_0A;
179 }
180
181 return TYPEC_PWR_MODE_USB;
182}
183
184static enum typec_data_role rt1719_get_data_role(u32 conn)
185{
186 if (conn & RT1719_DATAROLE_MASK)
187 return TYPEC_HOST;
188 return TYPEC_DEVICE;
189}
190
191static void rt1719_set_data_role(struct rt1719_data *data,
192 enum typec_data_role data_role,
193 bool attached)
194{
195 enum usb_role usb_role = USB_ROLE_NONE;
196
197 if (attached) {
198 if (data_role == TYPEC_HOST)
199 usb_role = USB_ROLE_HOST;
200 else
201 usb_role = USB_ROLE_DEVICE;
202 }
203
204 usb_role_switch_set_role(sw: data->role_sw, role: usb_role);
205 typec_set_data_role(port: data->port, role: data_role);
206}
207
208static void rt1719_update_data_role(struct rt1719_data *data)
209{
210 if (!data->attached)
211 return;
212
213 rt1719_set_data_role(data, data_role: rt1719_get_data_role(conn: data->conn_info), attached: true);
214}
215
216static void rt1719_register_partner(struct rt1719_data *data)
217{
218 u16 spec_rev = 0;
219
220 if (data->pd_capable) {
221 u32 rev;
222
223 rev = FIELD_GET(RT1719_PDSPECREV_MASK, data->conn_info);
224 switch (rev) {
225 case USBPD_SPECREV_3_0:
226 spec_rev = 0x0300;
227 break;
228 case USBPD_SPECREV_2_0:
229 spec_rev = 0x0200;
230 break;
231 default:
232 spec_rev = 0x0100;
233 break;
234 }
235 }
236
237 /* Just to prevent multiple times attach */
238 if (data->partner)
239 typec_unregister_partner(partner: data->partner);
240
241 memset(&data->partner_ident, 0, sizeof(data->partner_ident));
242 data->partner_desc.usb_pd = data->pd_capable;
243 data->partner_desc.pd_revision = spec_rev;
244
245 if (data->conn_info & RT1719_ATTACH_DBG)
246 data->partner_desc.accessory = TYPEC_ACCESSORY_DEBUG;
247 else
248 data->partner_desc.accessory = TYPEC_ACCESSORY_NONE;
249
250 data->partner = typec_register_partner(port: data->port, desc: &data->partner_desc);
251}
252
253static void rt1719_attach(struct rt1719_data *data)
254{
255 enum typec_pwr_opmode pwr_opmode;
256 enum typec_data_role data_role;
257 u32 volt = 5000, curr = 500;
258
259 if (!(data->conn_info & RT1719_ATTACHDEV_MASK))
260 return;
261
262 pwr_opmode = rt1719_get_pwr_opmode(conn: data->conn_info, stat: data->conn_stat);
263 data_role = rt1719_get_data_role(conn: data->conn_info);
264
265 typec_set_pwr_opmode(port: data->port, mode: pwr_opmode);
266 rt1719_set_data_role(data, data_role, attached: true);
267
268 if (data->conn_info & RT1719_ATTACH_SNK)
269 rt1719_register_partner(data);
270
271 if (pwr_opmode == TYPEC_PWR_MODE_3_0A)
272 curr = 3000;
273 else if (pwr_opmode == TYPEC_PWR_MODE_1_5A)
274 curr = 1500;
275
276 data->voltage = volt * 1000;
277 data->max_current = data->op_current = curr * 1000;
278 data->attached = true;
279
280 power_supply_changed(psy: data->psy);
281}
282
283static void rt1719_detach(struct rt1719_data *data)
284{
285 if (!data->attached || (data->conn_info & RT1719_ATTACHDEV_MASK))
286 return;
287
288 typec_unregister_partner(partner: data->partner);
289 data->partner = NULL;
290
291 typec_set_pwr_opmode(port: data->port, mode: TYPEC_PWR_MODE_USB);
292 rt1719_set_data_role(data, data_role: TYPEC_DEVICE, attached: false);
293
294 memset32(s: data->spdos, v: 0, RT1719_MAX_SRCPDO);
295 data->spdo_num = 0;
296 data->voltage = data->max_current = data->op_current = 0;
297 data->attached = data->pd_capable = false;
298
299 data->usb_type = POWER_SUPPLY_USB_TYPE_C;
300
301 power_supply_changed(psy: data->psy);
302}
303
304static void rt1719_update_operating_status(struct rt1719_data *data)
305{
306 enum power_supply_usb_type usb_type = POWER_SUPPLY_USB_TYPE_PD;
307 u32 voltage, max_current, op_current;
308 int i, snk_sel;
309
310 for (i = 0; i < data->spdo_num; i++) {
311 u32 pdo = data->spdos[i];
312 enum pd_pdo_type type = pdo_type(pdo);
313
314 if (type == PDO_TYPE_APDO) {
315 usb_type = POWER_SUPPLY_USB_TYPE_PD_PPS;
316 break;
317 }
318 }
319
320 data->spdo_sel = FIELD_GET(RT1719_SPDOSEL_MASK, data->conn_info);
321 if (data->spdo_sel <= 0)
322 return;
323
324 data->usb_type = usb_type;
325
326 voltage = pdo_fixed_voltage(pdo: data->spdos[data->spdo_sel - 1]);
327 max_current = pdo_max_current(pdo: data->spdos[data->spdo_sel - 1]);
328
329 switch (voltage) {
330 case 5000:
331 snk_sel = RT1719_SNKCAP_5V;
332 break;
333 case 9000:
334 snk_sel = RT1719_SNKCAP_9V;
335 break;
336 case 12000:
337 snk_sel = RT1719_SNKCAP_12V;
338 break;
339 case 15000:
340 snk_sel = RT1719_SNKCAP_15V;
341 break;
342 case 20000:
343 snk_sel = RT1719_SNKCAP_20V;
344 break;
345 default:
346 return;
347 }
348
349 op_current = min(max_current, pdo_max_current(data->snkcaps[snk_sel]));
350
351 /* covert mV/mA to uV/uA */
352 data->voltage = voltage * 1000;
353 data->max_current = max_current * 1000;
354 data->op_current = op_current * 1000;
355
356 power_supply_changed(psy: data->psy);
357}
358
359static void rt1719_update_pwr_opmode(struct rt1719_data *data)
360{
361 if (!data->attached)
362 return;
363
364 if (!data->pd_capable) {
365 data->pd_capable = true;
366
367 typec_set_pwr_opmode(port: data->port, mode: TYPEC_PWR_MODE_PD);
368 rt1719_register_partner(data);
369 }
370
371 rt1719_update_operating_status(data);
372}
373
374static void rt1719_update_source_pdos(struct rt1719_data *data)
375{
376 int spdo_num = FIELD_GET(RT1719_SPDONUM_MASK, data->conn_info);
377 __le32 src_pdos[RT1719_MAX_SRCPDO] = { };
378 int i, ret;
379
380 if (!data->attached)
381 return;
382
383 ret = regmap_raw_read(map: data->regmap, RT1719_REG_SRCPDO1, val: src_pdos,
384 val_len: sizeof(__le32) * spdo_num);
385 if (ret)
386 return;
387
388 data->spdo_num = spdo_num;
389 for (i = 0; i < spdo_num; i++)
390 data->spdos[i] = le32_to_cpu(src_pdos[i]);
391}
392
393static int rt1719_dr_set(struct typec_port *port, enum typec_data_role role)
394{
395 struct rt1719_data *data = typec_get_drvdata(port);
396 enum typec_data_role cur_role;
397 int ret;
398
399 if (!data->attached || !data->pd_capable || !data->drswap_support)
400 return -EOPNOTSUPP;
401
402 if (data->spdo_num > 0 && !(data->spdos[0] & PDO_FIXED_DATA_SWAP))
403 return -EINVAL;
404
405 cur_role = rt1719_get_data_role(conn: data->conn_info);
406 if (cur_role == role)
407 return 0;
408
409 ret = regmap_update_bits(map: data->regmap, RT1719_REG_TXCTRL1,
410 RT1719_REQDRSWAP_MASK, RT1719_REQDRSWAP_MASK);
411 if (ret)
412 return ret;
413
414 reinit_completion(x: &data->req_completion);
415 ret = wait_for_completion_timeout(x: &data->req_completion,
416 timeout: msecs_to_jiffies(m: 400));
417 if (ret == 0)
418 return -ETIMEDOUT;
419
420 cur_role = rt1719_get_data_role(conn: data->conn_info);
421 if (cur_role != role)
422 return -EAGAIN;
423
424 rt1719_set_data_role(data, data_role: role, attached: true);
425 return 0;
426}
427
428static const struct typec_operations rt1719_port_ops = {
429 .dr_set = rt1719_dr_set,
430};
431
432static int rt1719_usbpd_request_voltage(struct rt1719_data *data)
433{
434 u32 src_voltage;
435 int snk_sel, src_sel = -1;
436 int i, ret;
437
438 if (!data->attached || !data->pd_capable || data->spdo_sel <= 0)
439 return -EINVAL;
440
441 src_voltage = pdo_fixed_voltage(pdo: data->spdos[data->spdo_sel - 1]);
442 if (src_voltage == data->req_voltage)
443 return 0;
444
445 switch (data->req_voltage) {
446 case 5000:
447 snk_sel = RT1719_SNKCAP_5V;
448 break;
449 case 9000:
450 snk_sel = RT1719_SNKCAP_9V;
451 break;
452 case 12000:
453 snk_sel = RT1719_SNKCAP_12V;
454 break;
455 case 15000:
456 snk_sel = RT1719_SNKCAP_15V;
457 break;
458 case 20000:
459 snk_sel = RT1719_SNKCAP_20V;
460 break;
461 default:
462 return -EINVAL;
463 }
464
465 if (!(data->snkcaps[snk_sel] & RT1719_PSEL_SUPPORT))
466 return -EINVAL;
467
468 for (i = 0; i < data->spdo_num; i++) {
469 enum pd_pdo_type type = pdo_type(pdo: data->spdos[i]);
470
471 if (type != PDO_TYPE_FIXED)
472 continue;
473
474 src_voltage = pdo_fixed_voltage(pdo: data->spdos[i]);
475 if (src_voltage == data->req_voltage) {
476 src_sel = i;
477 break;
478 }
479 }
480
481 if (src_sel == -1)
482 return -EOPNOTSUPP;
483
484 ret = regmap_update_bits(map: data->regmap, RT1719_REG_TXCTRL1,
485 RT1719_EVALMODE_MASK | RT1719_REQSRCPDO_MASK,
486 RT1719_EVALMODE_MASK | (src_sel + 1));
487 ret |= regmap_update_bits(map: data->regmap, RT1719_REG_TXCTRL2,
488 RT1719_TXSPDOREQ_MASK, RT1719_TXSPDOREQ_MASK);
489 if (ret)
490 return ret;
491
492 reinit_completion(x: &data->req_completion);
493 ret = wait_for_completion_timeout(x: &data->req_completion,
494 timeout: msecs_to_jiffies(m: 400));
495 if (!ret)
496 return -ETIMEDOUT;
497
498 return 0;
499}
500
501static int rt1719_psy_set_property(struct power_supply *psy,
502 enum power_supply_property psp,
503 const union power_supply_propval *val)
504{
505 struct rt1719_data *data = power_supply_get_drvdata(psy);
506
507 if (psp == POWER_SUPPLY_PROP_VOLTAGE_NOW) {
508 data->req_voltage = val->intval / 1000;
509 return rt1719_usbpd_request_voltage(data);
510 }
511
512 return -EINVAL;
513}
514
515static int rt1719_psy_get_property(struct power_supply *psy,
516 enum power_supply_property psp,
517 union power_supply_propval *val)
518{
519 struct rt1719_data *data = power_supply_get_drvdata(psy);
520 int ret = 0;
521
522 switch (psp) {
523 case POWER_SUPPLY_PROP_ONLINE:
524 val->intval = data->attached ? 1 : 0;
525 break;
526 case POWER_SUPPLY_PROP_USB_TYPE:
527 val->intval = data->usb_type;
528 break;
529 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
530 val->intval = data->voltage;
531 break;
532 case POWER_SUPPLY_PROP_CURRENT_MAX:
533 val->intval = data->max_current;
534 break;
535 case POWER_SUPPLY_PROP_CURRENT_NOW:
536 val->intval = data->op_current;
537 break;
538 default:
539 ret = -EINVAL;
540 break;
541 }
542
543 return ret;
544}
545
546static int rt1719_psy_property_is_writeable(struct power_supply *psy,
547 enum power_supply_property psp)
548{
549 if (psp == POWER_SUPPLY_PROP_VOLTAGE_NOW)
550 return 1;
551 return 0;
552}
553
554static int devm_rt1719_psy_register(struct rt1719_data *data)
555{
556 struct power_supply_config psy_cfg = { };
557 char *psy_name;
558
559 psy_cfg.fwnode = dev_fwnode(data->dev);
560 psy_cfg.drv_data = data;
561
562 psy_name = devm_kasprintf(dev: data->dev, GFP_KERNEL, fmt: "rt1719-source-psy-%s",
563 dev_name(dev: data->dev));
564 if (!psy_name)
565 return -ENOMEM;
566
567 data->psy_desc.name = psy_name;
568 data->psy_desc.type = POWER_SUPPLY_TYPE_USB;
569 data->psy_desc.usb_types = BIT(POWER_SUPPLY_USB_TYPE_C) |
570 BIT(POWER_SUPPLY_USB_TYPE_PD) |
571 BIT(POWER_SUPPLY_USB_TYPE_PD_PPS);
572 data->psy_desc.properties = rt1719_psy_properties;
573 data->psy_desc.num_properties = ARRAY_SIZE(rt1719_psy_properties);
574 data->psy_desc.get_property = rt1719_psy_get_property;
575 data->psy_desc.set_property = rt1719_psy_set_property;
576 data->psy_desc.property_is_writeable = rt1719_psy_property_is_writeable;
577
578 data->usb_type = POWER_SUPPLY_USB_TYPE_C;
579
580 data->psy = devm_power_supply_register(parent: data->dev, desc: &data->psy_desc,
581 cfg: &psy_cfg);
582
583 return PTR_ERR_OR_ZERO(ptr: data->psy);
584}
585
586static irqreturn_t rt1719_irq_handler(int irq, void *priv)
587{
588 struct rt1719_data *data = priv;
589 u32 events, conn_info;
590 u16 conn_stat;
591 int ret;
592
593 ret = rt1719_read32(data, RT1719_REG_EVENTS, val: &events);
594 ret |= rt1719_read32(data, RT1719_REG_POLICYINFO, val: &conn_info);
595 ret |= rt1719_read16(data, RT1719_REG_STATS, val: &conn_stat);
596 if (ret)
597 return IRQ_NONE;
598
599 data->conn_info = conn_info;
600 data->conn_stat = conn_stat;
601
602 events &= (RT1719_INT_DRSW_ACCEPT | RT1719_INT_RX_SRCCAP |
603 RT1719_INT_VBUS_PRESENT | RT1719_INT_VBUS_DCT |
604 RT1719_INT_PE_SNK_RDY);
605
606 if (events & RT1719_INT_DRSW_ACCEPT)
607 rt1719_update_data_role(data);
608
609 if (events & RT1719_INT_VBUS_PRESENT)
610 rt1719_attach(data);
611
612 if (events & RT1719_INT_VBUS_DCT)
613 rt1719_detach(data);
614
615 if (events & RT1719_INT_RX_SRCCAP)
616 rt1719_update_source_pdos(data);
617
618 if (events & RT1719_INT_PE_SNK_RDY) {
619 complete(&data->req_completion);
620 rt1719_update_pwr_opmode(data);
621 }
622
623 /* Write 1 to clear already handled events */
624 rt1719_write32(data, RT1719_REG_EVENTS, val: events);
625
626 return IRQ_HANDLED;
627}
628
629static int rt1719_irq_init(struct rt1719_data *data)
630{
631 struct i2c_client *i2c = to_i2c_client(data->dev);
632 u32 irq_enable;
633 int ret;
634
635 irq_enable = RT1719_INT_DRSW_ACCEPT | RT1719_INT_RX_SRCCAP |
636 RT1719_INT_VBUS_DCT | RT1719_INT_VBUS_PRESENT |
637 RT1719_INT_PE_SNK_RDY;
638
639 ret = rt1719_write32(data, RT1719_REG_MASKS, val: irq_enable);
640 if (ret) {
641 dev_err(&i2c->dev, "Failed to config irq enable\n");
642 return ret;
643 }
644
645 return devm_request_threaded_irq(dev: &i2c->dev, irq: i2c->irq, NULL,
646 thread_fn: rt1719_irq_handler, IRQF_ONESHOT,
647 devname: dev_name(dev: &i2c->dev), dev_id: data);
648}
649
650static int rt1719_init_attach_state(struct rt1719_data *data)
651{
652 u32 conn_info, irq_clear;
653 u16 conn_stat;
654 int ret;
655
656 irq_clear = RT1719_INT_DRSW_ACCEPT | RT1719_INT_RX_SRCCAP |
657 RT1719_INT_VBUS_DCT | RT1719_INT_VBUS_PRESENT |
658 RT1719_INT_PE_SNK_RDY;
659
660 ret = rt1719_read32(data, RT1719_REG_POLICYINFO, val: &conn_info);
661 ret |= rt1719_read16(data, RT1719_REG_STATS, val: &conn_stat);
662 ret |= rt1719_write32(data, RT1719_REG_EVENTS, val: irq_clear);
663 if (ret)
664 return ret;
665
666 data->conn_info = conn_info;
667 data->conn_stat = conn_stat;
668
669 if (conn_info & RT1719_ATTACHDEV_MASK)
670 rt1719_attach(data);
671
672 if (conn_info & RT1719_PE_EXP_CONTRACT) {
673 rt1719_update_source_pdos(data);
674 rt1719_update_pwr_opmode(data);
675 }
676
677 return 0;
678}
679
680#define RT1719_PSEL_CAPINFO(_lomask, _milliwatt, _himask, _milliamp) { \
681 .lomask = _lomask, \
682 .milliwatt = _milliwatt, \
683 .himask = _himask, \
684 .milliamp = _milliamp, \
685}
686
687static const struct rt1719_psel_cap rt1719_psel_caps[] = {
688 RT1719_PSEL_CAPINFO(0x18, 75000, 0x10, 5000),
689 RT1719_PSEL_CAPINFO(0x18, 60000, 0x10, 4500),
690 RT1719_PSEL_CAPINFO(0x18, 45000, 0x10, 4000),
691 RT1719_PSEL_CAPINFO(0x18, 30000, 0x10, 3500),
692 RT1719_PSEL_CAPINFO(0x18, 25000, 0x10, 3000),
693 RT1719_PSEL_CAPINFO(0x18, 20000, 0x10, 2500),
694 RT1719_PSEL_CAPINFO(0x18, 15000, 0x10, 2000),
695 RT1719_PSEL_CAPINFO(0x18, 10000, 0x10, 1000),
696 RT1719_PSEL_CAPINFO(0x1C, 60000, 0x1F, 5000),
697 RT1719_PSEL_CAPINFO(0x1C, 45000, 0x1F, 4500),
698 RT1719_PSEL_CAPINFO(0x1C, 30000, 0x1F, 4000),
699 RT1719_PSEL_CAPINFO(0x1C, 24000, 0x1F, 3500),
700 RT1719_PSEL_CAPINFO(0x1C, 15000, 0x1F, 3000),
701 RT1719_PSEL_CAPINFO(0x1C, 10000, 0x1F, 2500),
702 RT1719_PSEL_CAPINFO(0x0C, 60000, 0x1F, 2000),
703 RT1719_PSEL_CAPINFO(0x0C, 45000, 0x1F, 1000),
704 RT1719_PSEL_CAPINFO(0x0C, 36000, 0x08, 5000),
705 RT1719_PSEL_CAPINFO(0x0C, 30000, 0x08, 4500),
706 RT1719_PSEL_CAPINFO(0x0C, 24000, 0x08, 4000),
707 RT1719_PSEL_CAPINFO(0x0C, 15000, 0x08, 3500),
708 RT1719_PSEL_CAPINFO(0x0C, 10000, 0x08, 3000),
709 RT1719_PSEL_CAPINFO(0x1E, 45000, 0x08, 2500),
710 RT1719_PSEL_CAPINFO(0x1E, 36000, 0x08, 2000),
711 RT1719_PSEL_CAPINFO(0x1E, 27000, 0x08, 1500),
712 RT1719_PSEL_CAPINFO(0x1E, 20000, 0x08, 1000),
713 RT1719_PSEL_CAPINFO(0x1E, 15000, 0x0F, 5000),
714 RT1719_PSEL_CAPINFO(0x1E, 9000, 0x0F, 4500),
715 RT1719_PSEL_CAPINFO(0x0E, 45000, 0x0F, 4000),
716 RT1719_PSEL_CAPINFO(0x0E, 36000, 0x0F, 3500),
717 RT1719_PSEL_CAPINFO(0x0E, 27000, 0x0F, 3000),
718 RT1719_PSEL_CAPINFO(0x0E, 20000, 0x0F, 2500),
719 RT1719_PSEL_CAPINFO(0x0E, 15000, 0x0F, 2000),
720 RT1719_PSEL_CAPINFO(0x0E, 9000, 0x0F, 1500),
721 RT1719_PSEL_CAPINFO(0x06, 45000, 0x0F, 1000),
722 RT1719_PSEL_CAPINFO(0x06, 36000, 0x0F, 500),
723 RT1719_PSEL_CAPINFO(0x06, 27000, 0x04, 5000),
724 RT1719_PSEL_CAPINFO(0x06, 24000, 0x04, 4500),
725 RT1719_PSEL_CAPINFO(0x06, 18000, 0x04, 4000),
726 RT1719_PSEL_CAPINFO(0x06, 12000, 0x04, 3500),
727 RT1719_PSEL_CAPINFO(0x06, 9000, 0x04, 3000),
728 RT1719_PSEL_CAPINFO(0x1F, 25000, 0x04, 2500),
729 RT1719_PSEL_CAPINFO(0x1F, 20000, 0x04, 2000),
730 RT1719_PSEL_CAPINFO(0x1F, 15000, 0x04, 1500),
731 RT1719_PSEL_CAPINFO(0x1F, 10000, 0x04, 1000),
732 RT1719_PSEL_CAPINFO(0x1F, 7500, 0x07, 5000),
733 RT1719_PSEL_CAPINFO(0x0F, 25000, 0x07, 4500),
734 RT1719_PSEL_CAPINFO(0x0F, 20000, 0x07, 4000),
735 RT1719_PSEL_CAPINFO(0x0F, 15000, 0x07, 3500),
736 RT1719_PSEL_CAPINFO(0x0F, 10000, 0x07, 3000),
737 RT1719_PSEL_CAPINFO(0x0F, 7500, 0x07, 2500),
738 RT1719_PSEL_CAPINFO(0x07, 25000, 0x07, 2000),
739 RT1719_PSEL_CAPINFO(0x07, 20000, 0x07, 1500),
740 RT1719_PSEL_CAPINFO(0x07, 15000, 0x07, 1000),
741 RT1719_PSEL_CAPINFO(0x07, 10000, 0x07, 500),
742 RT1719_PSEL_CAPINFO(0x07, 7500, 0x03, 5000),
743 RT1719_PSEL_CAPINFO(0x03, 25000, 0x03, 4500),
744 RT1719_PSEL_CAPINFO(0x03, 20000, 0x03, 4000),
745 RT1719_PSEL_CAPINFO(0x03, 15000, 0x03, 3500),
746 RT1719_PSEL_CAPINFO(0x03, 10000, 0x03, 3000),
747 RT1719_PSEL_CAPINFO(0x03, 7500, 0x03, 2500),
748 RT1719_PSEL_CAPINFO(0x01, 15000, 0x03, 2000),
749 RT1719_PSEL_CAPINFO(0x01, 10000, 0x03, 1500),
750 RT1719_PSEL_CAPINFO(0x01, 7500, 0x03, 1000),
751 RT1719_PSEL_CAPINFO(0x01, 2500, 0x03, 500)
752};
753
754static u16 rt1719_gen_snkcap_by_current(const struct rt1719_psel_cap *psel_cap,
755 enum rt1719_snkcap capsel)
756{
757 u16 cap = RT1719_PSEL_SUPPORT;
758
759 if (!(psel_cap->himask & BIT(capsel)))
760 return 0;
761
762 cap |= psel_cap->milliamp / 10;
763 return cap;
764}
765
766static u16 rt1719_gen_snkcap_by_watt(const struct rt1719_psel_cap *psel_cap,
767 enum rt1719_snkcap capsel)
768{
769 u32 volt_div[RT1719_MAX_SNKCAP] = { 5, 9, 12, 15, 20 };
770 u16 cap = RT1719_PSEL_SUPPORT;
771
772 if (!(psel_cap->lomask & BIT(capsel)))
773 return 0;
774
775 cap |= min(psel_cap->milliwatt / volt_div[capsel], (u32)5000) / 10;
776 return cap;
777}
778
779static u16 rt1719_gen_snkcap(unsigned int pselinfo, enum rt1719_snkcap capsel)
780{
781 int psel = FIELD_GET(RT1719_LATPSEL_MASK, pselinfo);
782 const struct rt1719_psel_cap *psel_cap;
783 bool by_current = false;
784
785 if (pselinfo & RT1719_TBLSEL_MASK)
786 by_current = true;
787
788 psel_cap = rt1719_psel_caps + psel;
789 if (by_current)
790 return rt1719_gen_snkcap_by_current(psel_cap, capsel);
791
792 return rt1719_gen_snkcap_by_watt(psel_cap, capsel);
793}
794
795static int rt1719_get_caps(struct rt1719_data *data)
796{
797 unsigned int pselinfo, usbinfo;
798 int i, ret;
799
800 ret = regmap_read(map: data->regmap, RT1719_REG_PSELINFO, val: &pselinfo);
801 ret |= regmap_read(map: data->regmap, RT1719_REG_USBSETINFO, val: &usbinfo);
802 if (ret)
803 return ret;
804
805 for (i = 0; i < RT1719_MAX_SNKCAP; i++)
806 data->snkcaps[i] = rt1719_gen_snkcap(pselinfo, capsel: i);
807
808 usbinfo = FIELD_GET(RT1719_USBINFO_MASK, usbinfo);
809 if (usbinfo == RT1719_USB_DFPUFP)
810 data->drswap_support = true;
811
812 return 0;
813}
814
815static int rt1719_check_exist(struct rt1719_data *data)
816{
817 u16 pid;
818 int ret;
819
820 ret = rt1719_read16(data, RT1719_REG_VENID, val: &pid);
821 if (ret)
822 return ret;
823
824 if (pid != RT1719_UNIQUE_PID) {
825 dev_err(data->dev, "Incorrect PID 0x%04x\n", pid);
826 return -ENODEV;
827 }
828
829 return 0;
830}
831
832static const struct regmap_config rt1719_regmap_config = {
833 .reg_bits = 8,
834 .val_bits = 8,
835 .max_register = 0xff,
836};
837
838static int rt1719_probe(struct i2c_client *i2c)
839{
840 struct rt1719_data *data;
841 struct fwnode_handle *fwnode;
842 struct typec_capability typec_cap = { };
843 int ret;
844
845 data = devm_kzalloc(dev: &i2c->dev, size: sizeof(*data), GFP_KERNEL);
846 if (!data)
847 return -ENOMEM;
848
849 data->dev = &i2c->dev;
850 init_completion(x: &data->req_completion);
851
852 data->regmap = devm_regmap_init_i2c(i2c, &rt1719_regmap_config);
853 if (IS_ERR(ptr: data->regmap)) {
854 ret = PTR_ERR(ptr: data->regmap);
855 dev_err(&i2c->dev, "Failed to init regmap (%d)\n", ret);
856 return ret;
857 }
858
859 ret = rt1719_check_exist(data);
860 if (ret)
861 return ret;
862
863 ret = rt1719_get_caps(data);
864 if (ret)
865 return ret;
866
867 fwnode = device_get_named_child_node(dev: &i2c->dev, childname: "connector");
868 if (!fwnode)
869 return -ENODEV;
870
871 data->role_sw = fwnode_usb_role_switch_get(node: fwnode);
872 if (IS_ERR(ptr: data->role_sw)) {
873 ret = PTR_ERR(ptr: data->role_sw);
874 dev_err(&i2c->dev, "Failed to get usb role switch (%d)\n", ret);
875 goto err_fwnode_put;
876 }
877
878 ret = devm_rt1719_psy_register(data);
879 if (ret) {
880 dev_err(&i2c->dev, "Failed to register psy (%d)\n", ret);
881 goto err_role_put;
882 }
883
884 typec_cap.revision = USB_TYPEC_REV_1_2;
885 typec_cap.pd_revision = 0x300; /* USB-PD spec release 3.0 */
886 typec_cap.type = TYPEC_PORT_SNK;
887 typec_cap.data = TYPEC_PORT_DRD;
888 typec_cap.ops = &rt1719_port_ops;
889 typec_cap.fwnode = fwnode;
890 typec_cap.driver_data = data;
891 typec_cap.accessory[0] = TYPEC_ACCESSORY_DEBUG;
892
893 data->partner_desc.identity = &data->partner_ident;
894
895 data->port = typec_register_port(parent: &i2c->dev, cap: &typec_cap);
896 if (IS_ERR(ptr: data->port)) {
897 ret = PTR_ERR(ptr: data->port);
898 dev_err(&i2c->dev, "Failed to register typec port (%d)\n", ret);
899 goto err_role_put;
900 }
901
902 ret = rt1719_init_attach_state(data);
903 if (ret) {
904 dev_err(&i2c->dev, "Failed to init attach state (%d)\n", ret);
905 goto err_role_put;
906 }
907
908 ret = rt1719_irq_init(data);
909 if (ret) {
910 dev_err(&i2c->dev, "Failed to init irq\n");
911 goto err_role_put;
912 }
913
914 fwnode_handle_put(fwnode);
915
916 i2c_set_clientdata(client: i2c, data);
917
918 return 0;
919
920err_role_put:
921 usb_role_switch_put(sw: data->role_sw);
922err_fwnode_put:
923 fwnode_handle_put(fwnode);
924
925 return ret;
926}
927
928static void rt1719_remove(struct i2c_client *i2c)
929{
930 struct rt1719_data *data = i2c_get_clientdata(client: i2c);
931
932 typec_unregister_port(port: data->port);
933 usb_role_switch_put(sw: data->role_sw);
934}
935
936static const struct of_device_id __maybe_unused rt1719_device_table[] = {
937 { .compatible = "richtek,rt1719", },
938 { }
939};
940MODULE_DEVICE_TABLE(of, rt1719_device_table);
941
942static struct i2c_driver rt1719_driver = {
943 .driver = {
944 .name = "rt1719",
945 .of_match_table = rt1719_device_table,
946 },
947 .probe = rt1719_probe,
948 .remove = rt1719_remove,
949};
950module_i2c_driver(rt1719_driver);
951
952MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
953MODULE_DESCRIPTION("Richtek RT1719 Sink Only USBPD Controller Driver");
954MODULE_LICENSE("GPL v2");
955

source code of linux/drivers/usb/typec/rt1719.c