1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * typec_wcove.c - WhiskeyCove PMIC USB Type-C PHY driver
4 *
5 * Copyright (C) 2017 Intel Corporation
6 * Author: Heikki Krogerus <heikki.krogerus@linux.intel.com>
7 */
8
9 #include <linux/acpi.h>
10 #include <linux/module.h>
11 #include <linux/usb/tcpm.h>
12 #include <linux/interrupt.h>
13 #include <linux/platform_device.h>
14 #include <linux/mfd/intel_soc_pmic.h>
15
16 /* Register offsets */
17 #define WCOVE_CHGRIRQ0 0x4e09
18
19 #define USBC_CONTROL1 0x7001
20 #define USBC_CONTROL2 0x7002
21 #define USBC_CONTROL3 0x7003
22 #define USBC_CC1_CTRL 0x7004
23 #define USBC_CC2_CTRL 0x7005
24 #define USBC_STATUS1 0x7007
25 #define USBC_STATUS2 0x7008
26 #define USBC_STATUS3 0x7009
27 #define USBC_CC1 0x700a
28 #define USBC_CC2 0x700b
29 #define USBC_CC1_STATUS 0x700c
30 #define USBC_CC2_STATUS 0x700d
31 #define USBC_IRQ1 0x7015
32 #define USBC_IRQ2 0x7016
33 #define USBC_IRQMASK1 0x7017
34 #define USBC_IRQMASK2 0x7018
35 #define USBC_PDCFG2 0x701a
36 #define USBC_PDCFG3 0x701b
37 #define USBC_PDSTATUS 0x701c
38 #define USBC_RXSTATUS 0x701d
39 #define USBC_RXINFO 0x701e
40 #define USBC_TXCMD 0x701f
41 #define USBC_TXINFO 0x7020
42 #define USBC_RX_DATA 0x7028
43 #define USBC_TX_DATA 0x7047
44
45 /* Register bits */
46
47 #define USBC_CONTROL1_MODE_MASK 0x3
48 #define USBC_CONTROL1_MODE_SNK 0
49 #define USBC_CONTROL1_MODE_SNKACC 1
50 #define USBC_CONTROL1_MODE_SRC 2
51 #define USBC_CONTROL1_MODE_SRCACC 3
52 #define USBC_CONTROL1_MODE_DRP 4
53 #define USBC_CONTROL1_MODE_DRPACC 5
54 #define USBC_CONTROL1_MODE_TEST 7
55 #define USBC_CONTROL1_CURSRC_MASK 0xc
56 #define USBC_CONTROL1_CURSRC_UA_0 (0 << 3)
57 #define USBC_CONTROL1_CURSRC_UA_80 (1 << 3)
58 #define USBC_CONTROL1_CURSRC_UA_180 (2 << 3)
59 #define USBC_CONTROL1_CURSRC_UA_330 (3 << 3)
60 #define USBC_CONTROL1_DRPTOGGLE_RANDOM 0xe0
61
62 #define USBC_CONTROL2_UNATT_SNK BIT(0)
63 #define USBC_CONTROL2_UNATT_SRC BIT(1)
64 #define USBC_CONTROL2_DIS_ST BIT(2)
65
66 #define USBC_CONTROL3_DET_DIS BIT(0)
67 #define USBC_CONTROL3_PD_DIS BIT(1)
68 #define USBC_CONTROL3_RESETPHY BIT(2)
69
70 #define USBC_CC_CTRL_PU_EN BIT(0)
71 #define USBC_CC_CTRL_VCONN_EN BIT(1)
72 #define USBC_CC_CTRL_TX_EN BIT(2)
73 #define USBC_CC_CTRL_PD_EN BIT(3)
74 #define USBC_CC_CTRL_CDET_EN BIT(4)
75 #define USBC_CC_CTRL_RDET_EN BIT(5)
76 #define USBC_CC_CTRL_ADC_EN BIT(6)
77 #define USBC_CC_CTRL_VBUSOK BIT(7)
78
79 #define USBC_STATUS1_DET_ONGOING BIT(6)
80 #define USBC_STATUS1_RSLT(r) ((r) & 0xf)
81 #define USBC_RSLT_NOTHING 0
82 #define USBC_RSLT_SRC_DEFAULT 1
83 #define USBC_RSLT_SRC_1_5A 2
84 #define USBC_RSLT_SRC_3_0A 3
85 #define USBC_RSLT_SNK 4
86 #define USBC_RSLT_DEBUG_ACC 5
87 #define USBC_RSLT_AUDIO_ACC 6
88 #define USBC_RSLT_UNDEF 15
89 #define USBC_STATUS1_ORIENT(r) (((r) >> 4) & 0x3)
90 #define USBC_ORIENT_NORMAL 1
91 #define USBC_ORIENT_REVERSE 2
92
93 #define USBC_STATUS2_VBUS_REQ BIT(5)
94
95 #define UCSC_CC_STATUS_SNK_RP BIT(0)
96 #define UCSC_CC_STATUS_PWRDEFSNK BIT(1)
97 #define UCSC_CC_STATUS_PWR_1P5A_SNK BIT(2)
98 #define UCSC_CC_STATUS_PWR_3A_SNK BIT(3)
99 #define UCSC_CC_STATUS_SRC_RP BIT(4)
100 #define UCSC_CC_STATUS_RX(r) (((r) >> 5) & 0x3)
101 #define USBC_CC_STATUS_RD 1
102 #define USBC_CC_STATUS_RA 2
103
104 #define USBC_IRQ1_ADCDONE1 BIT(2)
105 #define USBC_IRQ1_OVERTEMP BIT(1)
106 #define USBC_IRQ1_SHORT BIT(0)
107
108 #define USBC_IRQ2_CC_CHANGE BIT(7)
109 #define USBC_IRQ2_RX_PD BIT(6)
110 #define USBC_IRQ2_RX_HR BIT(5)
111 #define USBC_IRQ2_RX_CR BIT(4)
112 #define USBC_IRQ2_TX_SUCCESS BIT(3)
113 #define USBC_IRQ2_TX_FAIL BIT(2)
114
115 #define USBC_IRQMASK1_ALL (USBC_IRQ1_ADCDONE1 | USBC_IRQ1_OVERTEMP | \
116 USBC_IRQ1_SHORT)
117
118 #define USBC_IRQMASK2_ALL (USBC_IRQ2_CC_CHANGE | USBC_IRQ2_RX_PD | \
119 USBC_IRQ2_RX_HR | USBC_IRQ2_RX_CR | \
120 USBC_IRQ2_TX_SUCCESS | USBC_IRQ2_TX_FAIL)
121
122 #define USBC_PDCFG2_SOP BIT(0)
123 #define USBC_PDCFG2_SOP_P BIT(1)
124 #define USBC_PDCFG2_SOP_PP BIT(2)
125 #define USBC_PDCFG2_SOP_P_DEBUG BIT(3)
126 #define USBC_PDCFG2_SOP_PP_DEBUG BIT(4)
127
128 #define USBC_PDCFG3_DATAROLE_SHIFT 1
129 #define USBC_PDCFG3_SOP_SHIFT 2
130
131 #define USBC_RXSTATUS_RXCLEAR BIT(0)
132 #define USBC_RXSTATUS_RXDATA BIT(7)
133
134 #define USBC_RXINFO_RXBYTES(i) (((i) >> 3) & 0x1f)
135
136 #define USBC_TXCMD_BUF_RDY BIT(0)
137 #define USBC_TXCMD_START BIT(1)
138 #define USBC_TXCMD_NOP (0 << 5)
139 #define USBC_TXCMD_MSG (1 << 5)
140 #define USBC_TXCMD_CR (2 << 5)
141 #define USBC_TXCMD_HR (3 << 5)
142 #define USBC_TXCMD_BIST (4 << 5)
143
144 #define USBC_TXINFO_RETRIES(d) (d << 3)
145
146 struct wcove_typec {
147 struct mutex lock; /* device lock */
148 struct device *dev;
149 struct regmap *regmap;
150 guid_t guid;
151
152 bool vbus;
153
154 struct tcpc_dev tcpc;
155 struct tcpm_port *tcpm;
156 };
157
158 #define tcpc_to_wcove(_tcpc_) container_of(_tcpc_, struct wcove_typec, tcpc)
159
160 enum wcove_typec_func {
161 WCOVE_FUNC_DRIVE_VBUS = 1,
162 WCOVE_FUNC_ORIENTATION,
163 WCOVE_FUNC_ROLE,
164 WCOVE_FUNC_DRIVE_VCONN,
165 };
166
167 enum wcove_typec_orientation {
168 WCOVE_ORIENTATION_NORMAL,
169 WCOVE_ORIENTATION_REVERSE,
170 };
171
172 enum wcove_typec_role {
173 WCOVE_ROLE_HOST,
174 WCOVE_ROLE_DEVICE,
175 };
176
177 #define WCOVE_DSM_UUID "482383f0-2876-4e49-8685-db66211af037"
178
wcove_typec_func(struct wcove_typec * wcove,enum wcove_typec_func func,int param)179 static int wcove_typec_func(struct wcove_typec *wcove,
180 enum wcove_typec_func func, int param)
181 {
182 union acpi_object *obj;
183 union acpi_object tmp;
184 union acpi_object argv4 = ACPI_INIT_DSM_ARGV4(1, &tmp);
185
186 tmp.type = ACPI_TYPE_INTEGER;
187 tmp.integer.value = param;
188
189 obj = acpi_evaluate_dsm(ACPI_HANDLE(wcove->dev), &wcove->guid, 1, func,
190 &argv4);
191 if (!obj) {
192 dev_err(wcove->dev, "%s: failed to evaluate _DSM\n", __func__);
193 return -EIO;
194 }
195
196 ACPI_FREE(obj);
197 return 0;
198 }
199
wcove_init(struct tcpc_dev * tcpc)200 static int wcove_init(struct tcpc_dev *tcpc)
201 {
202 struct wcove_typec *wcove = tcpc_to_wcove(tcpc);
203 int ret;
204
205 ret = regmap_write(wcove->regmap, USBC_CONTROL1, 0);
206 if (ret)
207 return ret;
208
209 /* Unmask everything */
210 ret = regmap_write(wcove->regmap, USBC_IRQMASK1, 0);
211 if (ret)
212 return ret;
213
214 return regmap_write(wcove->regmap, USBC_IRQMASK2, 0);
215 }
216
wcove_get_vbus(struct tcpc_dev * tcpc)217 static int wcove_get_vbus(struct tcpc_dev *tcpc)
218 {
219 struct wcove_typec *wcove = tcpc_to_wcove(tcpc);
220 unsigned int cc1ctrl;
221 int ret;
222
223 ret = regmap_read(wcove->regmap, USBC_CC1_CTRL, &cc1ctrl);
224 if (ret)
225 return ret;
226
227 wcove->vbus = !!(cc1ctrl & USBC_CC_CTRL_VBUSOK);
228
229 return wcove->vbus;
230 }
231
wcove_set_vbus(struct tcpc_dev * tcpc,bool on,bool sink)232 static int wcove_set_vbus(struct tcpc_dev *tcpc, bool on, bool sink)
233 {
234 struct wcove_typec *wcove = tcpc_to_wcove(tcpc);
235
236 return wcove_typec_func(wcove, WCOVE_FUNC_DRIVE_VBUS, on);
237 }
238
wcove_set_vconn(struct tcpc_dev * tcpc,bool on)239 static int wcove_set_vconn(struct tcpc_dev *tcpc, bool on)
240 {
241 struct wcove_typec *wcove = tcpc_to_wcove(tcpc);
242
243 return wcove_typec_func(wcove, WCOVE_FUNC_DRIVE_VCONN, on);
244 }
245
wcove_to_typec_cc(unsigned int cc)246 static enum typec_cc_status wcove_to_typec_cc(unsigned int cc)
247 {
248 if (cc & UCSC_CC_STATUS_SNK_RP) {
249 if (cc & UCSC_CC_STATUS_PWRDEFSNK)
250 return TYPEC_CC_RP_DEF;
251 else if (cc & UCSC_CC_STATUS_PWR_1P5A_SNK)
252 return TYPEC_CC_RP_1_5;
253 else if (cc & UCSC_CC_STATUS_PWR_3A_SNK)
254 return TYPEC_CC_RP_3_0;
255 } else {
256 switch (UCSC_CC_STATUS_RX(cc)) {
257 case USBC_CC_STATUS_RD:
258 return TYPEC_CC_RD;
259 case USBC_CC_STATUS_RA:
260 return TYPEC_CC_RA;
261 default:
262 break;
263 }
264 }
265 return TYPEC_CC_OPEN;
266 }
267
wcove_get_cc(struct tcpc_dev * tcpc,enum typec_cc_status * cc1,enum typec_cc_status * cc2)268 static int wcove_get_cc(struct tcpc_dev *tcpc, enum typec_cc_status *cc1,
269 enum typec_cc_status *cc2)
270 {
271 struct wcove_typec *wcove = tcpc_to_wcove(tcpc);
272 unsigned int cc1_status;
273 unsigned int cc2_status;
274 int ret;
275
276 ret = regmap_read(wcove->regmap, USBC_CC1_STATUS, &cc1_status);
277 if (ret)
278 return ret;
279
280 ret = regmap_read(wcove->regmap, USBC_CC2_STATUS, &cc2_status);
281 if (ret)
282 return ret;
283
284 *cc1 = wcove_to_typec_cc(cc1_status);
285 *cc2 = wcove_to_typec_cc(cc2_status);
286
287 return 0;
288 }
289
wcove_set_cc(struct tcpc_dev * tcpc,enum typec_cc_status cc)290 static int wcove_set_cc(struct tcpc_dev *tcpc, enum typec_cc_status cc)
291 {
292 struct wcove_typec *wcove = tcpc_to_wcove(tcpc);
293 unsigned int ctrl;
294
295 switch (cc) {
296 case TYPEC_CC_RD:
297 ctrl = USBC_CONTROL1_MODE_SNK;
298 break;
299 case TYPEC_CC_RP_DEF:
300 ctrl = USBC_CONTROL1_CURSRC_UA_80 | USBC_CONTROL1_MODE_SRC;
301 break;
302 case TYPEC_CC_RP_1_5:
303 ctrl = USBC_CONTROL1_CURSRC_UA_180 | USBC_CONTROL1_MODE_SRC;
304 break;
305 case TYPEC_CC_RP_3_0:
306 ctrl = USBC_CONTROL1_CURSRC_UA_330 | USBC_CONTROL1_MODE_SRC;
307 break;
308 case TYPEC_CC_OPEN:
309 ctrl = 0;
310 break;
311 default:
312 return -EINVAL;
313 }
314
315 return regmap_write(wcove->regmap, USBC_CONTROL1, ctrl);
316 }
317
wcove_set_polarity(struct tcpc_dev * tcpc,enum typec_cc_polarity pol)318 static int wcove_set_polarity(struct tcpc_dev *tcpc, enum typec_cc_polarity pol)
319 {
320 struct wcove_typec *wcove = tcpc_to_wcove(tcpc);
321
322 return wcove_typec_func(wcove, WCOVE_FUNC_ORIENTATION, pol);
323 }
324
wcove_set_current_limit(struct tcpc_dev * tcpc,u32 max_ma,u32 mv)325 static int wcove_set_current_limit(struct tcpc_dev *tcpc, u32 max_ma, u32 mv)
326 {
327 return 0;
328 }
329
wcove_set_roles(struct tcpc_dev * tcpc,bool attached,enum typec_role role,enum typec_data_role data)330 static int wcove_set_roles(struct tcpc_dev *tcpc, bool attached,
331 enum typec_role role, enum typec_data_role data)
332 {
333 struct wcove_typec *wcove = tcpc_to_wcove(tcpc);
334 unsigned int val;
335 int ret;
336
337 ret = wcove_typec_func(wcove, WCOVE_FUNC_ROLE, data == TYPEC_HOST ?
338 WCOVE_ROLE_HOST : WCOVE_ROLE_DEVICE);
339 if (ret)
340 return ret;
341
342 val = role;
343 val |= data << USBC_PDCFG3_DATAROLE_SHIFT;
344 val |= PD_REV20 << USBC_PDCFG3_SOP_SHIFT;
345
346 return regmap_write(wcove->regmap, USBC_PDCFG3, val);
347 }
348
wcove_set_pd_rx(struct tcpc_dev * tcpc,bool on)349 static int wcove_set_pd_rx(struct tcpc_dev *tcpc, bool on)
350 {
351 struct wcove_typec *wcove = tcpc_to_wcove(tcpc);
352
353 return regmap_write(wcove->regmap, USBC_PDCFG2,
354 on ? USBC_PDCFG2_SOP : 0);
355 }
356
wcove_pd_transmit(struct tcpc_dev * tcpc,enum tcpm_transmit_type type,const struct pd_message * msg,unsigned int negotiated_rev)357 static int wcove_pd_transmit(struct tcpc_dev *tcpc,
358 enum tcpm_transmit_type type,
359 const struct pd_message *msg,
360 unsigned int negotiated_rev)
361 {
362 struct wcove_typec *wcove = tcpc_to_wcove(tcpc);
363 unsigned int info = 0;
364 unsigned int cmd;
365 int ret;
366
367 ret = regmap_read(wcove->regmap, USBC_TXCMD, &cmd);
368 if (ret)
369 return ret;
370
371 if (!(cmd & USBC_TXCMD_BUF_RDY)) {
372 dev_warn(wcove->dev, "%s: Last transmission still ongoing!",
373 __func__);
374 return -EBUSY;
375 }
376
377 if (msg) {
378 const u8 *data = (void *)msg;
379 int i;
380
381 for (i = 0; i < pd_header_cnt_le(msg->header) * 4 + 2; i++) {
382 ret = regmap_write(wcove->regmap, USBC_TX_DATA + i,
383 data[i]);
384 if (ret)
385 return ret;
386 }
387 }
388
389 switch (type) {
390 case TCPC_TX_SOP:
391 case TCPC_TX_SOP_PRIME:
392 case TCPC_TX_SOP_PRIME_PRIME:
393 case TCPC_TX_SOP_DEBUG_PRIME:
394 case TCPC_TX_SOP_DEBUG_PRIME_PRIME:
395 info = type + 1;
396 cmd = USBC_TXCMD_MSG;
397 break;
398 case TCPC_TX_HARD_RESET:
399 cmd = USBC_TXCMD_HR;
400 break;
401 case TCPC_TX_CABLE_RESET:
402 cmd = USBC_TXCMD_CR;
403 break;
404 case TCPC_TX_BIST_MODE_2:
405 cmd = USBC_TXCMD_BIST;
406 break;
407 default:
408 return -EINVAL;
409 }
410
411 /* NOTE Setting maximum number of retries (7) */
412 ret = regmap_write(wcove->regmap, USBC_TXINFO,
413 info | USBC_TXINFO_RETRIES(7));
414 if (ret)
415 return ret;
416
417 return regmap_write(wcove->regmap, USBC_TXCMD, cmd | USBC_TXCMD_START);
418 }
419
wcove_start_toggling(struct tcpc_dev * tcpc,enum typec_port_type port_type,enum typec_cc_status cc)420 static int wcove_start_toggling(struct tcpc_dev *tcpc,
421 enum typec_port_type port_type,
422 enum typec_cc_status cc)
423 {
424 struct wcove_typec *wcove = tcpc_to_wcove(tcpc);
425 unsigned int usbc_ctrl;
426
427 if (port_type != TYPEC_PORT_DRP)
428 return -EOPNOTSUPP;
429
430 usbc_ctrl = USBC_CONTROL1_MODE_DRP | USBC_CONTROL1_DRPTOGGLE_RANDOM;
431
432 switch (cc) {
433 case TYPEC_CC_RP_1_5:
434 usbc_ctrl |= USBC_CONTROL1_CURSRC_UA_180;
435 break;
436 case TYPEC_CC_RP_3_0:
437 usbc_ctrl |= USBC_CONTROL1_CURSRC_UA_330;
438 break;
439 default:
440 usbc_ctrl |= USBC_CONTROL1_CURSRC_UA_80;
441 break;
442 }
443
444 return regmap_write(wcove->regmap, USBC_CONTROL1, usbc_ctrl);
445 }
446
wcove_read_rx_buffer(struct wcove_typec * wcove,struct pd_message * msg)447 static int wcove_read_rx_buffer(struct wcove_typec *wcove,
448 struct pd_message *msg)
449 {
450 unsigned int info, val, len;
451 u8 *buf = (u8 *)msg;
452 int ret;
453 int i;
454
455 ret = regmap_read(wcove->regmap, USBC_RXINFO, &info);
456 if (ret)
457 return ret;
458
459 len = min(USBC_RXINFO_RXBYTES(info), sizeof(*msg));
460
461 for (i = 0; i < len; i++) {
462 ret = regmap_read(wcove->regmap, USBC_RX_DATA + i, &val);
463 if (ret)
464 return ret;
465 buf[i] = val;
466 }
467
468 return regmap_write(wcove->regmap, USBC_RXSTATUS,
469 USBC_RXSTATUS_RXCLEAR);
470 }
471
wcove_typec_irq(int irq,void * data)472 static irqreturn_t wcove_typec_irq(int irq, void *data)
473 {
474 struct wcove_typec *wcove = data;
475 unsigned int usbc_irq1 = 0;
476 unsigned int usbc_irq2 = 0;
477 unsigned int cc1ctrl;
478 int ret;
479
480 mutex_lock(&wcove->lock);
481
482 /* Read.. */
483 ret = regmap_read(wcove->regmap, USBC_IRQ1, &usbc_irq1);
484 if (ret)
485 goto err;
486
487 ret = regmap_read(wcove->regmap, USBC_IRQ2, &usbc_irq2);
488 if (ret)
489 goto err;
490
491 ret = regmap_read(wcove->regmap, USBC_CC1_CTRL, &cc1ctrl);
492 if (ret)
493 goto err;
494
495 if (!wcove->tcpm)
496 goto err;
497
498 /* ..check.. */
499 if (usbc_irq1 & USBC_IRQ1_OVERTEMP) {
500 dev_err(wcove->dev, "VCONN Switch Over Temperature!\n");
501 wcove_typec_func(wcove, WCOVE_FUNC_DRIVE_VCONN, false);
502 /* REVISIT: Report an error? */
503 }
504
505 if (usbc_irq1 & USBC_IRQ1_SHORT) {
506 dev_err(wcove->dev, "VCONN Switch Short Circuit!\n");
507 wcove_typec_func(wcove, WCOVE_FUNC_DRIVE_VCONN, false);
508 /* REVISIT: Report an error? */
509 }
510
511 if (wcove->vbus != !!(cc1ctrl & USBC_CC_CTRL_VBUSOK))
512 tcpm_vbus_change(wcove->tcpm);
513
514 /* REVISIT: See if tcpm code can be made to consider Type-C HW FSMs */
515 if (usbc_irq2 & USBC_IRQ2_CC_CHANGE)
516 tcpm_cc_change(wcove->tcpm);
517
518 if (usbc_irq2 & USBC_IRQ2_RX_PD) {
519 unsigned int status;
520
521 /*
522 * FIXME: Need to check if TX is ongoing and report
523 * TX_DIREGARDED if needed?
524 */
525
526 ret = regmap_read(wcove->regmap, USBC_RXSTATUS, &status);
527 if (ret)
528 goto err;
529
530 /* Flush all buffers */
531 while (status & USBC_RXSTATUS_RXDATA) {
532 struct pd_message msg;
533
534 ret = wcove_read_rx_buffer(wcove, &msg);
535 if (ret) {
536 dev_err(wcove->dev, "%s: RX read failed\n",
537 __func__);
538 goto err;
539 }
540
541 tcpm_pd_receive(wcove->tcpm, &msg, TCPC_TX_SOP);
542
543 ret = regmap_read(wcove->regmap, USBC_RXSTATUS,
544 &status);
545 if (ret)
546 goto err;
547 }
548 }
549
550 if (usbc_irq2 & USBC_IRQ2_RX_HR)
551 tcpm_pd_hard_reset(wcove->tcpm);
552
553 /* REVISIT: if (usbc_irq2 & USBC_IRQ2_RX_CR) */
554
555 if (usbc_irq2 & USBC_IRQ2_TX_SUCCESS)
556 tcpm_pd_transmit_complete(wcove->tcpm, TCPC_TX_SUCCESS);
557
558 if (usbc_irq2 & USBC_IRQ2_TX_FAIL)
559 tcpm_pd_transmit_complete(wcove->tcpm, TCPC_TX_FAILED);
560
561 err:
562 /* ..and clear. */
563 if (usbc_irq1) {
564 ret = regmap_write(wcove->regmap, USBC_IRQ1, usbc_irq1);
565 if (ret)
566 dev_WARN(wcove->dev, "%s failed to clear IRQ1\n",
567 __func__);
568 }
569
570 if (usbc_irq2) {
571 ret = regmap_write(wcove->regmap, USBC_IRQ2, usbc_irq2);
572 if (ret)
573 dev_WARN(wcove->dev, "%s failed to clear IRQ2\n",
574 __func__);
575 }
576
577 /* REVISIT: Clear WhiskeyCove CHGR Type-C interrupt */
578 regmap_write(wcove->regmap, WCOVE_CHGRIRQ0, BIT(5));
579
580 mutex_unlock(&wcove->lock);
581 return IRQ_HANDLED;
582 }
583
584 /*
585 * The following power levels should be safe to use with Joule board.
586 */
587 static const u32 src_pdo[] = {
588 PDO_FIXED(5000, 1500, PDO_FIXED_DUAL_ROLE | PDO_FIXED_DATA_SWAP |
589 PDO_FIXED_USB_COMM),
590 };
591
592 static const u32 snk_pdo[] = {
593 PDO_FIXED(5000, 500, PDO_FIXED_DUAL_ROLE | PDO_FIXED_DATA_SWAP |
594 PDO_FIXED_USB_COMM),
595 PDO_VAR(5000, 12000, 3000),
596 };
597
598 static const struct property_entry wcove_props[] = {
599 PROPERTY_ENTRY_STRING("data-role", "dual"),
600 PROPERTY_ENTRY_STRING("power-role", "dual"),
601 PROPERTY_ENTRY_STRING("try-power-role", "sink"),
602 PROPERTY_ENTRY_U32_ARRAY("source-pdos", src_pdo),
603 PROPERTY_ENTRY_U32_ARRAY("sink-pdos", snk_pdo),
604 PROPERTY_ENTRY_U32("op-sink-microwatt", 15000000),
605 { }
606 };
607
wcove_typec_probe(struct platform_device * pdev)608 static int wcove_typec_probe(struct platform_device *pdev)
609 {
610 struct intel_soc_pmic *pmic = dev_get_drvdata(pdev->dev.parent);
611 struct wcove_typec *wcove;
612 int irq;
613 int ret;
614
615 wcove = devm_kzalloc(&pdev->dev, sizeof(*wcove), GFP_KERNEL);
616 if (!wcove)
617 return -ENOMEM;
618
619 mutex_init(&wcove->lock);
620 wcove->dev = &pdev->dev;
621 wcove->regmap = pmic->regmap;
622
623 irq = platform_get_irq(pdev, 0);
624 if (irq < 0)
625 return irq;
626
627 ret = guid_parse(WCOVE_DSM_UUID, &wcove->guid);
628 if (ret)
629 return ret;
630
631 if (!acpi_check_dsm(ACPI_HANDLE(&pdev->dev), &wcove->guid, 0, 0x1f)) {
632 dev_err(&pdev->dev, "Missing _DSM functions\n");
633 return -ENODEV;
634 }
635
636 wcove->tcpc.init = wcove_init;
637 wcove->tcpc.get_vbus = wcove_get_vbus;
638 wcove->tcpc.set_vbus = wcove_set_vbus;
639 wcove->tcpc.set_cc = wcove_set_cc;
640 wcove->tcpc.get_cc = wcove_get_cc;
641 wcove->tcpc.set_polarity = wcove_set_polarity;
642 wcove->tcpc.set_vconn = wcove_set_vconn;
643 wcove->tcpc.set_current_limit = wcove_set_current_limit;
644 wcove->tcpc.start_toggling = wcove_start_toggling;
645
646 wcove->tcpc.set_pd_rx = wcove_set_pd_rx;
647 wcove->tcpc.set_roles = wcove_set_roles;
648 wcove->tcpc.pd_transmit = wcove_pd_transmit;
649
650 wcove->tcpc.fwnode = fwnode_create_software_node(wcove_props, NULL);
651 if (IS_ERR(wcove->tcpc.fwnode))
652 return PTR_ERR(wcove->tcpc.fwnode);
653
654 wcove->tcpm = tcpm_register_port(wcove->dev, &wcove->tcpc);
655 if (IS_ERR(wcove->tcpm)) {
656 fwnode_remove_software_node(wcove->tcpc.fwnode);
657 return PTR_ERR(wcove->tcpm);
658 }
659
660 ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
661 wcove_typec_irq, IRQF_ONESHOT,
662 "wcove_typec", wcove);
663 if (ret) {
664 tcpm_unregister_port(wcove->tcpm);
665 fwnode_remove_software_node(wcove->tcpc.fwnode);
666 return ret;
667 }
668
669 platform_set_drvdata(pdev, wcove);
670 return 0;
671 }
672
wcove_typec_remove(struct platform_device * pdev)673 static void wcove_typec_remove(struct platform_device *pdev)
674 {
675 struct wcove_typec *wcove = platform_get_drvdata(pdev);
676 unsigned int val;
677
678 /* Mask everything */
679 regmap_read(wcove->regmap, USBC_IRQMASK1, &val);
680 regmap_write(wcove->regmap, USBC_IRQMASK1, val | USBC_IRQMASK1_ALL);
681 regmap_read(wcove->regmap, USBC_IRQMASK2, &val);
682 regmap_write(wcove->regmap, USBC_IRQMASK2, val | USBC_IRQMASK2_ALL);
683
684 tcpm_unregister_port(wcove->tcpm);
685 fwnode_remove_software_node(wcove->tcpc.fwnode);
686 }
687
688 static struct platform_driver wcove_typec_driver = {
689 .driver = {
690 .name = "bxt_wcove_usbc",
691 },
692 .probe = wcove_typec_probe,
693 .remove = wcove_typec_remove,
694 };
695
696 module_platform_driver(wcove_typec_driver);
697
698 MODULE_AUTHOR("Intel Corporation");
699 MODULE_LICENSE("GPL v2");
700 MODULE_DESCRIPTION("WhiskeyCove PMIC USB Type-C PHY driver");
701 MODULE_ALIAS("platform:bxt_wcove_usbc");
702