xref: /openbmc/linux/drivers/usb/typec/anx7411.c (revision 7126a2ae)
1 // SPDX-License-Identifier: GPL-2.0-only
2 
3 /*
4  * Driver for Analogix ANX7411 USB Type-C and PD controller
5  *
6  * Copyright(c) 2022, Analogix Semiconductor. All rights reserved.
7  *
8  */
9 #include <linux/gpio/consumer.h>
10 #include <linux/i2c.h>
11 #include <linux/interrupt.h>
12 #include <linux/iopoll.h>
13 #include <linux/kernel.h>
14 #include <linux/module.h>
15 #include <linux/mutex.h>
16 #include <linux/of_graph.h>
17 #include <linux/of_platform.h>
18 #include <linux/pm_runtime.h>
19 #include <linux/regulator/consumer.h>
20 #include <linux/slab.h>
21 #include <linux/types.h>
22 #include <linux/usb/pd.h>
23 #include <linux/usb/role.h>
24 #include <linux/usb/tcpci.h>
25 #include <linux/usb/typec.h>
26 #include <linux/usb/typec_dp.h>
27 #include <linux/usb/typec_mux.h>
28 #include <linux/workqueue.h>
29 #include <linux/power_supply.h>
30 
31 #define TCPC_ADDRESS1		0x58
32 #define TCPC_ADDRESS2		0x56
33 #define TCPC_ADDRESS3		0x54
34 #define TCPC_ADDRESS4		0x52
35 #define SPI_ADDRESS1		0x7e
36 #define SPI_ADDRESS2		0x6e
37 #define SPI_ADDRESS3		0x64
38 #define SPI_ADDRESS4		0x62
39 
40 struct anx7411_i2c_select {
41 	u8 tcpc_address;
42 	u8 spi_address;
43 };
44 
45 #define VID_ANALOGIX		0x1F29
46 #define PID_ANALOGIX		0x7411
47 
48 /* TCPC register define */
49 
50 #define ANALOG_CTRL_10		0xAA
51 
52 #define STATUS_LEN		2
53 #define ALERT_0			0xCB
54 #define RECEIVED_MSG		BIT(7)
55 #define SOFTWARE_INT		BIT(6)
56 #define MSG_LEN			32
57 #define HEADER_LEN		2
58 #define MSG_HEADER		0x00
59 #define MSG_TYPE		0x01
60 #define MSG_RAWDATA		0x02
61 #define MSG_LEN_MASK		0x1F
62 
63 #define ALERT_1			0xCC
64 #define INTP_POW_ON		BIT(7)
65 #define INTP_POW_OFF		BIT(6)
66 
67 #define VBUS_THRESHOLD_H	0xDD
68 #define VBUS_THRESHOLD_L	0xDE
69 
70 #define FW_CTRL_0		0xF0
71 #define UNSTRUCT_VDM_EN		BIT(0)
72 #define DELAY_200MS		BIT(1)
73 #define VSAFE0			0
74 #define VSAFE1			BIT(2)
75 #define VSAFE2			BIT(3)
76 #define VSAFE3			(BIT(2) | BIT(3))
77 #define FRS_EN			BIT(7)
78 
79 #define FW_PARAM		0xF1
80 #define DONGLE_IOP		BIT(0)
81 
82 #define FW_CTRL_2		0xF7
83 #define SINK_CTRL_DIS_FLAG	BIT(5)
84 
85 /* SPI register define */
86 #define OCM_CTRL_0		0x6E
87 #define OCM_RESET		BIT(6)
88 
89 #define MAX_VOLTAGE		0xAC
90 #define MAX_POWER		0xAD
91 #define MIN_POWER		0xAE
92 
93 #define REQUEST_VOLTAGE		0xAF
94 #define VOLTAGE_UNIT		100 /* mV per unit */
95 
96 #define REQUEST_CURRENT		0xB1
97 #define CURRENT_UNIT		50 /* mA per unit */
98 
99 #define CMD_SEND_BUF		0xC0
100 #define CMD_RECV_BUF		0xE0
101 
102 #define REQ_VOL_20V_IN_100MV	0xC8
103 #define REQ_CUR_2_25A_IN_50MA	0x2D
104 #define REQ_CUR_3_25A_IN_50MA	0x41
105 
106 #define DEF_5V			5000
107 #define DEF_1_5A		1500
108 
109 #define LOBYTE(w)		((u8)((w) & 0xFF))
110 #define HIBYTE(w)		((u8)(((u16)(w) >> 8) & 0xFF))
111 
112 enum anx7411_typec_message_type {
113 	TYPE_SRC_CAP = 0x00,
114 	TYPE_SNK_CAP = 0x01,
115 	TYPE_SNK_IDENTITY = 0x02,
116 	TYPE_SVID = 0x03,
117 	TYPE_SET_SNK_DP_CAP = 0x08,
118 	TYPE_PSWAP_REQ = 0x10,
119 	TYPE_DSWAP_REQ = 0x11,
120 	TYPE_VDM = 0x14,
121 	TYPE_OBJ_REQ = 0x16,
122 	TYPE_DP_ALT_ENTER = 0x19,
123 	TYPE_DP_DISCOVER_MODES_INFO = 0x27,
124 	TYPE_GET_DP_CONFIG = 0x29,
125 	TYPE_DP_CONFIGURE = 0x2A,
126 	TYPE_GET_DP_DISCOVER_MODES_INFO = 0x2E,
127 	TYPE_GET_DP_ALT_ENTER = 0x2F,
128 };
129 
130 #define FW_CTRL_1		0xB2
131 #define AUTO_PD_EN		BIT(1)
132 #define TRYSRC_EN		BIT(2)
133 #define TRYSNK_EN		BIT(3)
134 #define FORCE_SEND_RDO		BIT(6)
135 
136 #define FW_VER			0xB4
137 #define FW_SUBVER		0xB5
138 
139 #define INT_MASK		0xB6
140 #define INT_STS			0xB7
141 #define OCM_BOOT_UP		BIT(0)
142 #define OC_OV_EVENT		BIT(1)
143 #define VCONN_CHANGE		BIT(2)
144 #define VBUS_CHANGE		BIT(3)
145 #define CC_STATUS_CHANGE	BIT(4)
146 #define DATA_ROLE_CHANGE	BIT(5)
147 #define PR_CONSUMER_GOT_POWER	BIT(6)
148 #define HPD_STATUS_CHANGE	BIT(7)
149 
150 #define SYSTEM_STSTUS		0xB8
151 /* 0: SINK off; 1: SINK on */
152 #define SINK_STATUS		BIT(1)
153 /* 0: VCONN off; 1: VCONN on*/
154 #define VCONN_STATUS		BIT(2)
155 /* 0: vbus off; 1: vbus on*/
156 #define VBUS_STATUS		BIT(3)
157 /* 1: host; 0:device*/
158 #define DATA_ROLE		BIT(5)
159 /* 0: Chunking; 1: Unchunked*/
160 #define SUPPORT_UNCHUNKING	BIT(6)
161 /* 0: HPD low; 1: HPD high*/
162 #define HPD_STATUS		BIT(7)
163 
164 #define DATA_DFP		1
165 #define DATA_UFP		2
166 #define POWER_SOURCE		1
167 #define POWER_SINK		2
168 
169 #define CC_STATUS		0xB9
170 #define CC1_RD			BIT(0)
171 #define CC2_RD			BIT(4)
172 #define CC1_RA			BIT(1)
173 #define CC2_RA			BIT(5)
174 #define CC1_RD			BIT(0)
175 #define CC1_RP(cc)		(((cc) >> 2) & 0x03)
176 #define CC2_RP(cc)		(((cc) >> 6) & 0x03)
177 
178 #define PD_REV_INIT		0xBA
179 
180 #define PD_EXT_MSG_CTRL		0xBB
181 #define SRC_CAP_EXT_REPLY	BIT(0)
182 #define MANUFACTURER_INFO_REPLY	BIT(1)
183 #define BATTERY_STS_REPLY	BIT(2)
184 #define BATTERY_CAP_REPLY	BIT(3)
185 #define ALERT_REPLY		BIT(4)
186 #define STATUS_REPLY		BIT(5)
187 #define PPS_STATUS_REPLY	BIT(6)
188 #define SNK_CAP_EXT_REPLY	BIT(7)
189 
190 #define NO_CONNECT		0x00
191 #define USB3_1_CONNECTED	0x01
192 #define DP_ALT_4LANES		0x02
193 #define USB3_1_DP_2LANES	0x03
194 #define CC1_CONNECTED		0x01
195 #define CC2_CONNECTED		0x02
196 #define SELECT_PIN_ASSIGMENT_C	0x04
197 #define SELECT_PIN_ASSIGMENT_D	0x08
198 #define SELECT_PIN_ASSIGMENT_E	0x10
199 #define SELECT_PIN_ASSIGMENT_U	0x00
200 #define REDRIVER_ADDRESS	0x20
201 #define REDRIVER_OFFSET		0x00
202 
203 #define DP_SVID			0xFF01
204 #define VDM_ACK			0x40
205 #define VDM_CMD_RES		0x00
206 #define VDM_CMD_DIS_ID		0x01
207 #define VDM_CMD_DIS_SVID	0x02
208 #define VDM_CMD_DIS_MOD		0x03
209 #define VDM_CMD_ENTER_MODE	0x04
210 #define VDM_CMD_EXIT_MODE	0x05
211 #define VDM_CMD_ATTENTION	0x06
212 #define VDM_CMD_GET_STS		0x10
213 #define VDM_CMD_AND_ACK_MASK	0x5F
214 
215 #define MAX_ALTMODE		2
216 
217 #define HAS_SOURCE_CAP		BIT(0)
218 #define HAS_SINK_CAP		BIT(1)
219 #define HAS_SINK_WATT		BIT(2)
220 
221 enum anx7411_psy_state {
222 	/* copy from drivers/usb/typec/tcpm */
223 	ANX7411_PSY_OFFLINE = 0,
224 	ANX7411_PSY_FIXED_ONLINE,
225 
226 	/* private */
227 	/* PD keep in, but disconnct power to bq25700,
228 	 * this state can be active when higher capacity adapter plug in,
229 	 * and change to ONLINE state when higher capacity adapter plug out
230 	 */
231 	ANX7411_PSY_HANG = 0xff,
232 };
233 
234 struct typec_params {
235 	int request_current; /* ma */
236 	int request_voltage; /* mv */
237 	int cc_connect;
238 	int cc_orientation_valid;
239 	int cc_status;
240 	int data_role;
241 	int power_role;
242 	int vconn_role;
243 	int dp_altmode_enter;
244 	int cust_altmode_enter;
245 	struct usb_role_switch *role_sw;
246 	struct typec_port *port;
247 	struct typec_partner *partner;
248 	struct typec_mux_dev *typec_mux;
249 	struct typec_switch_dev *typec_switch;
250 	struct typec_altmode *amode[MAX_ALTMODE];
251 	struct typec_altmode *port_amode[MAX_ALTMODE];
252 	struct typec_displayport_data data;
253 	int pin_assignment;
254 	struct typec_capability caps;
255 	u32 src_pdo[PDO_MAX_OBJECTS];
256 	u32 sink_pdo[PDO_MAX_OBJECTS];
257 	u8 caps_flags;
258 	u8 src_pdo_nr;
259 	u8 sink_pdo_nr;
260 	u8 sink_watt;
261 	u8 sink_voltage;
262 };
263 
264 #define MAX_BUF_LEN	30
265 struct fw_msg {
266 	u8 msg_len;
267 	u8 msg_type;
268 	u8 buf[MAX_BUF_LEN];
269 } __packed;
270 
271 struct anx7411_data {
272 	int fw_version;
273 	int fw_subversion;
274 	struct i2c_client *tcpc_client;
275 	struct i2c_client *spi_client;
276 	struct fw_msg send_msg;
277 	struct fw_msg recv_msg;
278 	struct gpio_desc *intp_gpiod;
279 	struct fwnode_handle *connector_fwnode;
280 	struct typec_params typec;
281 	int intp_irq;
282 	struct work_struct work;
283 	struct workqueue_struct *workqueue;
284 	/* Lock for interrupt work queue */
285 	struct mutex lock;
286 
287 	enum anx7411_psy_state psy_online;
288 	enum power_supply_usb_type usb_type;
289 	struct power_supply *psy;
290 	struct power_supply_desc psy_desc;
291 	struct device *dev;
292 };
293 
294 static u8 snk_identity[] = {
295 	LOBYTE(VID_ANALOGIX), HIBYTE(VID_ANALOGIX), 0x00, 0x82, /* snk_id_hdr */
296 	0x00, 0x00, 0x00, 0x00,                                 /* snk_cert */
297 	0x00, 0x00, LOBYTE(PID_ANALOGIX), HIBYTE(PID_ANALOGIX), /* 5snk_ama */
298 };
299 
300 static u8 dp_caps[4] = {0xC6, 0x00, 0x00, 0x00};
301 
anx7411_reg_read(struct i2c_client * client,u8 reg_addr)302 static int anx7411_reg_read(struct i2c_client *client,
303 			    u8 reg_addr)
304 {
305 	return i2c_smbus_read_byte_data(client, reg_addr);
306 }
307 
anx7411_reg_block_read(struct i2c_client * client,u8 reg_addr,u8 len,u8 * buf)308 static int anx7411_reg_block_read(struct i2c_client *client,
309 				  u8 reg_addr, u8 len, u8 *buf)
310 {
311 	return i2c_smbus_read_i2c_block_data(client, reg_addr, len, buf);
312 }
313 
anx7411_reg_write(struct i2c_client * client,u8 reg_addr,u8 reg_val)314 static int anx7411_reg_write(struct i2c_client *client,
315 			     u8 reg_addr, u8 reg_val)
316 {
317 	return i2c_smbus_write_byte_data(client, reg_addr, reg_val);
318 }
319 
anx7411_reg_block_write(struct i2c_client * client,u8 reg_addr,u8 len,u8 * buf)320 static int anx7411_reg_block_write(struct i2c_client *client,
321 				   u8 reg_addr, u8 len, u8 *buf)
322 {
323 	return i2c_smbus_write_i2c_block_data(client, reg_addr, len, buf);
324 }
325 
326 static struct anx7411_i2c_select anx7411_i2c_addr[] = {
327 	{TCPC_ADDRESS1, SPI_ADDRESS1},
328 	{TCPC_ADDRESS2, SPI_ADDRESS2},
329 	{TCPC_ADDRESS3, SPI_ADDRESS3},
330 	{TCPC_ADDRESS4, SPI_ADDRESS4},
331 };
332 
anx7411_detect_power_mode(struct anx7411_data * ctx)333 static int anx7411_detect_power_mode(struct anx7411_data *ctx)
334 {
335 	int ret;
336 	int mode;
337 
338 	ret = anx7411_reg_read(ctx->spi_client, REQUEST_CURRENT);
339 	if (ret < 0)
340 		return ret;
341 
342 	ctx->typec.request_current = ret * CURRENT_UNIT; /* 50ma per unit */
343 
344 	ret = anx7411_reg_read(ctx->spi_client, REQUEST_VOLTAGE);
345 	if (ret < 0)
346 		return ret;
347 
348 	ctx->typec.request_voltage = ret * VOLTAGE_UNIT; /* 100mv per unit */
349 
350 	if (ctx->psy_online == ANX7411_PSY_OFFLINE) {
351 		ctx->psy_online = ANX7411_PSY_FIXED_ONLINE;
352 		ctx->usb_type = POWER_SUPPLY_USB_TYPE_PD;
353 		power_supply_changed(ctx->psy);
354 	}
355 
356 	if (!ctx->typec.cc_orientation_valid)
357 		return 0;
358 
359 	if (ctx->typec.cc_connect == CC1_CONNECTED)
360 		mode = CC1_RP(ctx->typec.cc_status);
361 	else
362 		mode = CC2_RP(ctx->typec.cc_status);
363 	if (mode) {
364 		typec_set_pwr_opmode(ctx->typec.port, mode - 1);
365 		return 0;
366 	}
367 
368 	typec_set_pwr_opmode(ctx->typec.port, TYPEC_PWR_MODE_PD);
369 
370 	return 0;
371 }
372 
anx7411_register_partner(struct anx7411_data * ctx,int pd,int accessory)373 static int anx7411_register_partner(struct anx7411_data *ctx,
374 				    int pd, int accessory)
375 {
376 	struct typec_partner_desc desc;
377 	struct typec_partner *partner;
378 
379 	if (ctx->typec.partner)
380 		return 0;
381 
382 	desc.usb_pd = pd;
383 	desc.accessory = accessory;
384 	desc.identity = NULL;
385 	partner = typec_register_partner(ctx->typec.port, &desc);
386 	if (IS_ERR(partner))
387 		return PTR_ERR(partner);
388 
389 	ctx->typec.partner = partner;
390 
391 	return 0;
392 }
393 
anx7411_detect_cc_orientation(struct anx7411_data * ctx)394 static int anx7411_detect_cc_orientation(struct anx7411_data *ctx)
395 {
396 	struct device *dev = &ctx->spi_client->dev;
397 	int ret;
398 	int cc1_rd, cc2_rd;
399 	int cc1_ra, cc2_ra;
400 	int cc1_rp, cc2_rp;
401 
402 	ret = anx7411_reg_read(ctx->spi_client, CC_STATUS);
403 	if (ret < 0)
404 		return ret;
405 
406 	ctx->typec.cc_status = ret;
407 
408 	cc1_rd = ret & CC1_RD ? 1 : 0;
409 	cc2_rd = ret & CC2_RD ? 1 : 0;
410 	cc1_ra = ret & CC1_RA ? 1 : 0;
411 	cc2_ra = ret & CC2_RA ? 1 : 0;
412 	cc1_rp = CC1_RP(ret);
413 	cc2_rp = CC2_RP(ret);
414 
415 	/* Debug cable, nothing to do */
416 	if (cc1_rd && cc2_rd) {
417 		ctx->typec.cc_orientation_valid = 0;
418 		return anx7411_register_partner(ctx, 0, TYPEC_ACCESSORY_DEBUG);
419 	}
420 
421 	if (cc1_ra && cc2_ra) {
422 		ctx->typec.cc_orientation_valid = 0;
423 		return anx7411_register_partner(ctx, 0, TYPEC_ACCESSORY_AUDIO);
424 	}
425 
426 	ctx->typec.cc_orientation_valid = 1;
427 
428 	ret = anx7411_register_partner(ctx, 1, TYPEC_ACCESSORY_NONE);
429 	if (ret) {
430 		dev_err(dev, "register partner\n");
431 		return ret;
432 	}
433 
434 	if (cc1_rd || cc1_rp) {
435 		typec_set_orientation(ctx->typec.port, TYPEC_ORIENTATION_NORMAL);
436 		ctx->typec.cc_connect = CC1_CONNECTED;
437 	}
438 
439 	if (cc2_rd || cc2_rp) {
440 		typec_set_orientation(ctx->typec.port, TYPEC_ORIENTATION_REVERSE);
441 		ctx->typec.cc_connect = CC2_CONNECTED;
442 	}
443 
444 	return 0;
445 }
446 
anx7411_set_mux(struct anx7411_data * ctx,int pin_assignment)447 static int anx7411_set_mux(struct anx7411_data *ctx, int pin_assignment)
448 {
449 	int mode = TYPEC_STATE_SAFE;
450 
451 	switch (pin_assignment) {
452 	case SELECT_PIN_ASSIGMENT_U:
453 		/* default 4 line USB 3.1 */
454 		mode = TYPEC_STATE_MODAL;
455 		break;
456 	case SELECT_PIN_ASSIGMENT_C:
457 	case SELECT_PIN_ASSIGMENT_E:
458 		/* 4 line DP */
459 		mode = TYPEC_STATE_SAFE;
460 		break;
461 	case SELECT_PIN_ASSIGMENT_D:
462 		/* 2 line DP, 2 line USB */
463 		mode = TYPEC_MODE_USB3;
464 		break;
465 	default:
466 		mode = TYPEC_STATE_SAFE;
467 		break;
468 	}
469 
470 	ctx->typec.pin_assignment = pin_assignment;
471 
472 	return typec_set_mode(ctx->typec.port, mode);
473 }
474 
anx7411_set_usb_role(struct anx7411_data * ctx,enum usb_role role)475 static int anx7411_set_usb_role(struct anx7411_data *ctx, enum usb_role role)
476 {
477 	if (!ctx->typec.role_sw)
478 		return 0;
479 
480 	return usb_role_switch_set_role(ctx->typec.role_sw, role);
481 }
482 
anx7411_data_role_detect(struct anx7411_data * ctx)483 static int anx7411_data_role_detect(struct anx7411_data *ctx)
484 {
485 	int ret;
486 
487 	ret = anx7411_reg_read(ctx->spi_client, SYSTEM_STSTUS);
488 	if (ret < 0)
489 		return ret;
490 
491 	ctx->typec.data_role = (ret & DATA_ROLE) ? TYPEC_HOST : TYPEC_DEVICE;
492 	ctx->typec.vconn_role = (ret & VCONN_STATUS) ? TYPEC_SOURCE : TYPEC_SINK;
493 
494 	typec_set_data_role(ctx->typec.port, ctx->typec.data_role);
495 
496 	typec_set_vconn_role(ctx->typec.port, ctx->typec.vconn_role);
497 
498 	if (ctx->typec.data_role == TYPEC_HOST)
499 		return anx7411_set_usb_role(ctx, USB_ROLE_HOST);
500 
501 	return anx7411_set_usb_role(ctx, USB_ROLE_DEVICE);
502 }
503 
anx7411_power_role_detect(struct anx7411_data * ctx)504 static int anx7411_power_role_detect(struct anx7411_data *ctx)
505 {
506 	int ret;
507 
508 	ret = anx7411_reg_read(ctx->spi_client, SYSTEM_STSTUS);
509 	if (ret < 0)
510 		return ret;
511 
512 	ctx->typec.power_role = (ret & SINK_STATUS) ? TYPEC_SINK : TYPEC_SOURCE;
513 
514 	if (ctx->typec.power_role == TYPEC_SOURCE) {
515 		ctx->typec.request_current = DEF_1_5A;
516 		ctx->typec.request_voltage = DEF_5V;
517 	}
518 
519 	typec_set_pwr_role(ctx->typec.port, ctx->typec.power_role);
520 
521 	return 0;
522 }
523 
anx7411_cc_status_detect(struct anx7411_data * ctx)524 static int anx7411_cc_status_detect(struct anx7411_data *ctx)
525 {
526 	anx7411_detect_cc_orientation(ctx);
527 	anx7411_detect_power_mode(ctx);
528 
529 	return 0;
530 }
531 
anx7411_partner_unregister_altmode(struct anx7411_data * ctx)532 static void anx7411_partner_unregister_altmode(struct anx7411_data *ctx)
533 {
534 	int i;
535 
536 	ctx->typec.dp_altmode_enter = 0;
537 	ctx->typec.cust_altmode_enter = 0;
538 
539 	for (i = 0; i < MAX_ALTMODE; i++)
540 		if (ctx->typec.amode[i]) {
541 			typec_unregister_altmode(ctx->typec.amode[i]);
542 			ctx->typec.amode[i] = NULL;
543 		}
544 
545 	ctx->typec.pin_assignment = 0;
546 }
547 
anx7411_typec_register_altmode(struct anx7411_data * ctx,int svid,int vdo)548 static int anx7411_typec_register_altmode(struct anx7411_data *ctx,
549 					  int svid, int vdo)
550 {
551 	struct device *dev = &ctx->spi_client->dev;
552 	struct typec_altmode_desc desc;
553 	int err;
554 	int i;
555 
556 	desc.svid = svid;
557 	desc.vdo = vdo;
558 
559 	for (i = 0; i < MAX_ALTMODE; i++)
560 		if (!ctx->typec.amode[i])
561 			break;
562 
563 	desc.mode = i + 1; /* start with 1 */
564 
565 	if (i >= MAX_ALTMODE) {
566 		dev_err(dev, "no altmode space for registering\n");
567 		return -ENOMEM;
568 	}
569 
570 	ctx->typec.amode[i] = typec_partner_register_altmode(ctx->typec.partner,
571 							     &desc);
572 	if (IS_ERR(ctx->typec.amode[i])) {
573 		dev_err(dev, "failed to register altmode\n");
574 		err = PTR_ERR(ctx->typec.amode[i]);
575 		ctx->typec.amode[i] = NULL;
576 		return err;
577 	}
578 
579 	return 0;
580 }
581 
anx7411_unregister_partner(struct anx7411_data * ctx)582 static void anx7411_unregister_partner(struct anx7411_data *ctx)
583 {
584 	if (ctx->typec.partner) {
585 		typec_unregister_partner(ctx->typec.partner);
586 		ctx->typec.partner = NULL;
587 	}
588 }
589 
anx7411_update_altmode(struct anx7411_data * ctx,int svid)590 static int anx7411_update_altmode(struct anx7411_data *ctx, int svid)
591 {
592 	int i;
593 
594 	if (svid == DP_SVID)
595 		ctx->typec.dp_altmode_enter = 1;
596 	else
597 		ctx->typec.cust_altmode_enter = 1;
598 
599 	for (i = 0; i < MAX_ALTMODE; i++) {
600 		if (!ctx->typec.amode[i])
601 			continue;
602 
603 		if (ctx->typec.amode[i]->svid == svid) {
604 			typec_altmode_update_active(ctx->typec.amode[i], true);
605 			typec_altmode_notify(ctx->typec.amode[i],
606 					     ctx->typec.pin_assignment,
607 					     &ctx->typec.data);
608 			break;
609 		}
610 	}
611 
612 	return 0;
613 }
614 
anx7411_register_altmode(struct anx7411_data * ctx,bool dp_altmode,u8 * buf)615 static int anx7411_register_altmode(struct anx7411_data *ctx,
616 				    bool dp_altmode, u8 *buf)
617 {
618 	int ret;
619 	int svid;
620 	int mid;
621 
622 	if (!ctx->typec.partner)
623 		return 0;
624 
625 	svid = DP_SVID;
626 	if (dp_altmode) {
627 		mid = buf[0] | (buf[1] << 8) | (buf[2] << 16) | (buf[3] << 24);
628 
629 		return anx7411_typec_register_altmode(ctx, svid, mid);
630 	}
631 
632 	svid = (buf[3] << 8) | buf[2];
633 	if ((buf[0] & VDM_CMD_AND_ACK_MASK) != (VDM_ACK | VDM_CMD_ENTER_MODE))
634 		return anx7411_update_altmode(ctx, svid);
635 
636 	if ((buf[0] & VDM_CMD_AND_ACK_MASK) != (VDM_ACK | VDM_CMD_DIS_MOD))
637 		return 0;
638 
639 	mid = buf[4] | (buf[5] << 8) | (buf[6] << 16) | (buf[7] << 24);
640 
641 	ret = anx7411_typec_register_altmode(ctx, svid, mid);
642 	if (ctx->typec.cust_altmode_enter)
643 		ret |= anx7411_update_altmode(ctx, svid);
644 
645 	return ret;
646 }
647 
anx7411_parse_cmd(struct anx7411_data * ctx,u8 type,u8 * buf,u8 len)648 static int anx7411_parse_cmd(struct anx7411_data *ctx, u8 type, u8 *buf, u8 len)
649 {
650 	struct device *dev = &ctx->spi_client->dev;
651 	u8 cur_50ma, vol_100mv;
652 
653 	switch (type) {
654 	case TYPE_SRC_CAP:
655 		cur_50ma = anx7411_reg_read(ctx->spi_client, REQUEST_CURRENT);
656 		vol_100mv = anx7411_reg_read(ctx->spi_client, REQUEST_VOLTAGE);
657 
658 		ctx->typec.request_voltage = vol_100mv * VOLTAGE_UNIT;
659 		ctx->typec.request_current = cur_50ma * CURRENT_UNIT;
660 
661 		ctx->psy_online = ANX7411_PSY_FIXED_ONLINE;
662 		ctx->usb_type = POWER_SUPPLY_USB_TYPE_PD;
663 		power_supply_changed(ctx->psy);
664 		break;
665 	case TYPE_SNK_CAP:
666 		break;
667 	case TYPE_SVID:
668 		break;
669 	case TYPE_SNK_IDENTITY:
670 		break;
671 	case TYPE_GET_DP_ALT_ENTER:
672 		/* DP alt mode enter success */
673 		if (buf[0])
674 			anx7411_update_altmode(ctx, DP_SVID);
675 		break;
676 	case TYPE_DP_ALT_ENTER:
677 		/* Update DP altmode */
678 		anx7411_update_altmode(ctx, DP_SVID);
679 		break;
680 	case TYPE_OBJ_REQ:
681 		anx7411_detect_power_mode(ctx);
682 		break;
683 	case TYPE_DP_CONFIGURE:
684 		anx7411_set_mux(ctx, buf[1]);
685 		break;
686 	case TYPE_DP_DISCOVER_MODES_INFO:
687 		/* Make sure discover modes valid */
688 		if (buf[0] | buf[1])
689 			/* Register DP Altmode */
690 			anx7411_register_altmode(ctx, 1, buf);
691 		break;
692 	case TYPE_VDM:
693 		/* Register other altmode */
694 		anx7411_register_altmode(ctx, 0, buf);
695 		break;
696 	default:
697 		dev_err(dev, "ignore message(0x%.02x).\n", type);
698 		break;
699 	}
700 
701 	return 0;
702 }
703 
checksum(struct device * dev,u8 * buf,u8 len)704 static u8 checksum(struct device *dev, u8 *buf, u8 len)
705 {
706 	u8 ret = 0;
707 	u8 i;
708 
709 	for (i = 0; i < len; i++)
710 		ret += buf[i];
711 
712 	return ret;
713 }
714 
anx7411_read_msg_ctrl_status(struct i2c_client * client)715 static int anx7411_read_msg_ctrl_status(struct i2c_client *client)
716 {
717 	return anx7411_reg_read(client, CMD_SEND_BUF);
718 }
719 
anx7411_wait_msg_empty(struct i2c_client * client)720 static int anx7411_wait_msg_empty(struct i2c_client *client)
721 {
722 	int val;
723 
724 	return readx_poll_timeout(anx7411_read_msg_ctrl_status,
725 				  client, val, (val < 0) || (val == 0),
726 				  2000, 2000 * 150);
727 }
728 
anx7411_send_msg(struct anx7411_data * ctx,u8 type,u8 * buf,u8 size)729 static int anx7411_send_msg(struct anx7411_data *ctx, u8 type, u8 *buf, u8 size)
730 {
731 	struct device *dev = &ctx->spi_client->dev;
732 	struct fw_msg *msg = &ctx->send_msg;
733 	u8 crc;
734 	int ret;
735 
736 	size = min_t(u8, size, (u8)MAX_BUF_LEN);
737 	memcpy(msg->buf, buf, size);
738 	msg->msg_type = type;
739 	/* msg len equals buffer length + msg_type */
740 	msg->msg_len = size + 1;
741 
742 	/* Do CRC check for all buffer data and msg_len and msg_type */
743 	crc = checksum(dev, (u8 *)msg, size + HEADER_LEN);
744 	msg->buf[size] = 0 - crc;
745 
746 	ret = anx7411_wait_msg_empty(ctx->spi_client);
747 	if (ret)
748 		return ret;
749 
750 	ret = anx7411_reg_block_write(ctx->spi_client,
751 				      CMD_SEND_BUF + 1, size + HEADER_LEN,
752 				      &msg->msg_type);
753 	ret |= anx7411_reg_write(ctx->spi_client, CMD_SEND_BUF,
754 				 msg->msg_len);
755 	return ret;
756 }
757 
anx7411_process_cmd(struct anx7411_data * ctx)758 static int anx7411_process_cmd(struct anx7411_data *ctx)
759 {
760 	struct device *dev = &ctx->spi_client->dev;
761 	struct fw_msg *msg = &ctx->recv_msg;
762 	u8 len;
763 	u8 crc;
764 	int ret;
765 
766 	/* Read message from firmware */
767 	ret = anx7411_reg_block_read(ctx->spi_client, CMD_RECV_BUF,
768 				     MSG_LEN, (u8 *)msg);
769 	if (ret < 0)
770 		return 0;
771 
772 	if (!msg->msg_len)
773 		return 0;
774 
775 	ret = anx7411_reg_write(ctx->spi_client, CMD_RECV_BUF, 0);
776 	if (ret)
777 		return ret;
778 
779 	len = msg->msg_len & MSG_LEN_MASK;
780 	crc = checksum(dev, (u8 *)msg, len + HEADER_LEN);
781 	if (crc) {
782 		dev_err(dev, "message error crc(0x%.02x)\n", crc);
783 		return -ERANGE;
784 	}
785 
786 	return anx7411_parse_cmd(ctx, msg->msg_type, msg->buf, len - 1);
787 }
788 
anx7411_translate_payload(struct device * dev,__le32 * payload,u32 * pdo,int nr,const char * type)789 static void anx7411_translate_payload(struct device *dev, __le32 *payload,
790 				      u32 *pdo, int nr, const char *type)
791 {
792 	int i;
793 
794 	if (nr > PDO_MAX_OBJECTS) {
795 		dev_err(dev, "nr(%d) exceed PDO_MAX_OBJECTS(%d)\n",
796 			nr, PDO_MAX_OBJECTS);
797 
798 		return;
799 	}
800 
801 	for (i = 0; i < nr; i++)
802 		payload[i] = cpu_to_le32(pdo[i]);
803 }
804 
anx7411_config(struct anx7411_data * ctx)805 static int anx7411_config(struct anx7411_data *ctx)
806 {
807 	struct device *dev = &ctx->spi_client->dev;
808 	struct typec_params *typecp = &ctx->typec;
809 	__le32 payload[PDO_MAX_OBJECTS];
810 	int ret;
811 
812 	/* Config PD FW work under PD 2.0 */
813 	ret = anx7411_reg_write(ctx->spi_client, PD_REV_INIT, PD_REV20);
814 	ret |= anx7411_reg_write(ctx->tcpc_client, FW_CTRL_0,
815 				 UNSTRUCT_VDM_EN | DELAY_200MS |
816 				 VSAFE1 | FRS_EN);
817 	ret |= anx7411_reg_write(ctx->spi_client, FW_CTRL_1,
818 				 AUTO_PD_EN | FORCE_SEND_RDO);
819 
820 	/* Set VBUS current threshold */
821 	ret |= anx7411_reg_write(ctx->tcpc_client, VBUS_THRESHOLD_H, 0xff);
822 	ret |= anx7411_reg_write(ctx->tcpc_client, VBUS_THRESHOLD_L, 0x03);
823 
824 	/* Fix dongle compatible issue */
825 	ret |= anx7411_reg_write(ctx->tcpc_client, FW_PARAM,
826 				 anx7411_reg_read(ctx->tcpc_client, FW_PARAM) |
827 				 DONGLE_IOP);
828 	ret |= anx7411_reg_write(ctx->spi_client, INT_MASK, 0);
829 
830 	ret |= anx7411_reg_write(ctx->spi_client, PD_EXT_MSG_CTRL, 0xFF);
831 	if (ret)
832 		return ret;
833 
834 	if (typecp->caps_flags & HAS_SOURCE_CAP) {
835 		anx7411_translate_payload(dev, payload, typecp->src_pdo,
836 					  typecp->src_pdo_nr, "source");
837 		anx7411_send_msg(ctx, TYPE_SRC_CAP, (u8 *)&payload,
838 				 typecp->src_pdo_nr * 4);
839 		anx7411_send_msg(ctx, TYPE_SNK_IDENTITY, snk_identity,
840 				 sizeof(snk_identity));
841 		anx7411_send_msg(ctx, TYPE_SET_SNK_DP_CAP, dp_caps,
842 				 sizeof(dp_caps));
843 	}
844 
845 	if (typecp->caps_flags & HAS_SINK_CAP) {
846 		anx7411_translate_payload(dev, payload, typecp->sink_pdo,
847 					  typecp->sink_pdo_nr, "sink");
848 		anx7411_send_msg(ctx, TYPE_SNK_CAP, (u8 *)&payload,
849 				 typecp->sink_pdo_nr * 4);
850 	}
851 
852 	if (typecp->caps_flags & HAS_SINK_WATT) {
853 		if (typecp->sink_watt) {
854 			ret |= anx7411_reg_write(ctx->spi_client, MAX_POWER,
855 						 typecp->sink_watt);
856 			/* Set min power to 1W */
857 			ret |= anx7411_reg_write(ctx->spi_client, MIN_POWER, 2);
858 		}
859 
860 		if (typecp->sink_voltage)
861 			ret |= anx7411_reg_write(ctx->spi_client, MAX_VOLTAGE,
862 					  typecp->sink_voltage);
863 		if (ret)
864 			return ret;
865 	}
866 
867 	if (!typecp->caps_flags)
868 		usleep_range(5000, 6000);
869 
870 	ctx->fw_version = anx7411_reg_read(ctx->spi_client, FW_VER);
871 	ctx->fw_subversion = anx7411_reg_read(ctx->spi_client, FW_SUBVER);
872 
873 	return 0;
874 }
875 
anx7411_chip_standby(struct anx7411_data * ctx)876 static void anx7411_chip_standby(struct anx7411_data *ctx)
877 {
878 	int ret;
879 	u8 cc1, cc2;
880 	struct device *dev = &ctx->spi_client->dev;
881 
882 	ret = anx7411_reg_write(ctx->spi_client, OCM_CTRL_0,
883 				anx7411_reg_read(ctx->spi_client, OCM_CTRL_0) |
884 				OCM_RESET);
885 	ret |= anx7411_reg_write(ctx->tcpc_client, ANALOG_CTRL_10, 0x80);
886 	/* Set TCPC to RD and DRP enable */
887 	cc1 = TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC1_SHIFT;
888 	cc2 = TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC2_SHIFT;
889 	ret |= anx7411_reg_write(ctx->tcpc_client, TCPC_ROLE_CTRL,
890 				 TCPC_ROLE_CTRL_DRP | cc1 | cc2);
891 
892 	/* Send DRP toggle command */
893 	ret |= anx7411_reg_write(ctx->tcpc_client, TCPC_COMMAND,
894 				 TCPC_CMD_LOOK4CONNECTION);
895 
896 	/* Send TCPC enter standby command */
897 	ret |= anx7411_reg_write(ctx->tcpc_client,
898 				 TCPC_COMMAND, TCPC_CMD_I2C_IDLE);
899 	if (ret)
900 		dev_err(dev, "Chip standby failed\n");
901 }
902 
anx7411_work_func(struct work_struct * work)903 static void anx7411_work_func(struct work_struct *work)
904 {
905 	int ret;
906 	u8 buf[STATUS_LEN];
907 	u8 int_change; /* Interrupt change */
908 	u8 int_status; /* Firmware status update */
909 	u8 alert0, alert1; /* Interrupt alert source */
910 	struct anx7411_data *ctx = container_of(work, struct anx7411_data, work);
911 	struct device *dev = &ctx->spi_client->dev;
912 
913 	mutex_lock(&ctx->lock);
914 
915 	/* Read interrupt change status */
916 	ret = anx7411_reg_block_read(ctx->spi_client, INT_STS, STATUS_LEN, buf);
917 	if (ret < 0) {
918 		/* Power standby mode, just return */
919 		goto unlock;
920 	}
921 	int_change = buf[0];
922 	int_status = buf[1];
923 
924 	/* Read alert register */
925 	ret = anx7411_reg_block_read(ctx->tcpc_client, ALERT_0, STATUS_LEN, buf);
926 	if (ret < 0)
927 		goto unlock;
928 
929 	alert0 = buf[0];
930 	alert1 = buf[1];
931 
932 	/* Clear interrupt and alert status */
933 	ret = anx7411_reg_write(ctx->spi_client, INT_STS, 0);
934 	ret |= anx7411_reg_write(ctx->tcpc_client, ALERT_0, alert0);
935 	ret |= anx7411_reg_write(ctx->tcpc_client, ALERT_1, alert1);
936 	if (ret)
937 		goto unlock;
938 
939 	if (alert1 & INTP_POW_OFF) {
940 		anx7411_partner_unregister_altmode(ctx);
941 		if (anx7411_set_usb_role(ctx, USB_ROLE_NONE))
942 			dev_err(dev, "Set usb role\n");
943 		anx7411_unregister_partner(ctx);
944 		ctx->psy_online = ANX7411_PSY_OFFLINE;
945 		ctx->usb_type = POWER_SUPPLY_USB_TYPE_C;
946 		ctx->typec.request_voltage = 0;
947 		ctx->typec.request_current = 0;
948 		power_supply_changed(ctx->psy);
949 		anx7411_chip_standby(ctx);
950 		goto unlock;
951 	}
952 
953 	if ((alert0 & SOFTWARE_INT) && (int_change & OCM_BOOT_UP)) {
954 		if (anx7411_config(ctx))
955 			dev_err(dev, "Config failed\n");
956 		if (anx7411_data_role_detect(ctx))
957 			dev_err(dev, "set PD data role\n");
958 		if (anx7411_power_role_detect(ctx))
959 			dev_err(dev, "set PD power role\n");
960 		anx7411_set_mux(ctx, SELECT_PIN_ASSIGMENT_C);
961 	}
962 
963 	if (alert0 & RECEIVED_MSG)
964 		anx7411_process_cmd(ctx);
965 
966 	ret = (int_status & DATA_ROLE) ? TYPEC_HOST : TYPEC_DEVICE;
967 	if (ctx->typec.data_role != ret)
968 		if (anx7411_data_role_detect(ctx))
969 			dev_err(dev, "set PD data role\n");
970 
971 	ret = (int_status & SINK_STATUS) ? TYPEC_SINK : TYPEC_SOURCE;
972 	if (ctx->typec.power_role != ret)
973 		if (anx7411_power_role_detect(ctx))
974 			dev_err(dev, "set PD power role\n");
975 
976 	if ((alert0 & SOFTWARE_INT) && (int_change & CC_STATUS_CHANGE))
977 		anx7411_cc_status_detect(ctx);
978 
979 unlock:
980 	mutex_unlock(&ctx->lock);
981 }
982 
anx7411_intr_isr(int irq,void * data)983 static irqreturn_t anx7411_intr_isr(int irq, void *data)
984 {
985 	struct anx7411_data *ctx = (struct anx7411_data *)data;
986 
987 	queue_work(ctx->workqueue, &ctx->work);
988 
989 	return IRQ_HANDLED;
990 }
991 
anx7411_register_i2c_dummy_clients(struct anx7411_data * ctx,struct i2c_client * client)992 static int anx7411_register_i2c_dummy_clients(struct anx7411_data *ctx,
993 					      struct i2c_client *client)
994 {
995 	int i;
996 	u8 spi_addr;
997 
998 	for (i = 0; i < ARRAY_SIZE(anx7411_i2c_addr); i++) {
999 		if (client->addr == (anx7411_i2c_addr[i].tcpc_address >> 1)) {
1000 			spi_addr = anx7411_i2c_addr[i].spi_address >> 1;
1001 			ctx->spi_client = i2c_new_dummy_device(client->adapter,
1002 							       spi_addr);
1003 			if (!IS_ERR(ctx->spi_client))
1004 				return 0;
1005 		}
1006 	}
1007 
1008 	dev_err(&client->dev, "unable to get SPI slave\n");
1009 	return -ENOMEM;
1010 }
1011 
anx7411_port_unregister_altmodes(struct typec_altmode ** adev)1012 static void anx7411_port_unregister_altmodes(struct typec_altmode **adev)
1013 {
1014 	int i;
1015 
1016 	for (i = 0; i < MAX_ALTMODE; i++)
1017 		if (adev[i]) {
1018 			typec_unregister_altmode(adev[i]);
1019 			adev[i] = NULL;
1020 		}
1021 }
1022 
anx7411_usb_mux_set(struct typec_mux_dev * mux,struct typec_mux_state * state)1023 static int anx7411_usb_mux_set(struct typec_mux_dev *mux,
1024 			       struct typec_mux_state *state)
1025 {
1026 	struct anx7411_data *ctx = typec_mux_get_drvdata(mux);
1027 	struct device *dev = &ctx->spi_client->dev;
1028 	int has_dp;
1029 
1030 	has_dp = (state->alt && state->alt->svid == USB_TYPEC_DP_SID &&
1031 		  state->alt->mode == USB_TYPEC_DP_MODE);
1032 	if (!has_dp)
1033 		dev_err(dev, "dp altmode not register\n");
1034 
1035 	return 0;
1036 }
1037 
anx7411_usb_set_orientation(struct typec_switch_dev * sw,enum typec_orientation orientation)1038 static int anx7411_usb_set_orientation(struct typec_switch_dev *sw,
1039 				       enum typec_orientation orientation)
1040 {
1041 	/* No need set */
1042 
1043 	return 0;
1044 }
1045 
anx7411_register_switch(struct anx7411_data * ctx,struct device * dev,struct fwnode_handle * fwnode)1046 static int anx7411_register_switch(struct anx7411_data *ctx,
1047 				   struct device *dev,
1048 				   struct fwnode_handle *fwnode)
1049 {
1050 	struct typec_switch_desc sw_desc = { };
1051 
1052 	sw_desc.fwnode = fwnode;
1053 	sw_desc.drvdata = ctx;
1054 	sw_desc.name = fwnode_get_name(fwnode);
1055 	sw_desc.set = anx7411_usb_set_orientation;
1056 
1057 	ctx->typec.typec_switch = typec_switch_register(dev, &sw_desc);
1058 	if (IS_ERR(ctx->typec.typec_switch)) {
1059 		dev_err(dev, "switch register failed\n");
1060 		return PTR_ERR(ctx->typec.typec_switch);
1061 	}
1062 
1063 	return 0;
1064 }
1065 
anx7411_register_mux(struct anx7411_data * ctx,struct device * dev,struct fwnode_handle * fwnode)1066 static int anx7411_register_mux(struct anx7411_data *ctx,
1067 				struct device *dev,
1068 				struct fwnode_handle *fwnode)
1069 {
1070 	struct typec_mux_desc mux_desc = { };
1071 
1072 	mux_desc.fwnode = fwnode;
1073 	mux_desc.drvdata = ctx;
1074 	mux_desc.name = fwnode_get_name(fwnode);
1075 	mux_desc.set = anx7411_usb_mux_set;
1076 
1077 	ctx->typec.typec_mux = typec_mux_register(dev, &mux_desc);
1078 	if (IS_ERR(ctx->typec.typec_mux)) {
1079 		dev_err(dev, "mux register failed\n");
1080 		return PTR_ERR(ctx->typec.typec_mux);
1081 	}
1082 
1083 	return 0;
1084 }
1085 
anx7411_unregister_mux(struct anx7411_data * ctx)1086 static void anx7411_unregister_mux(struct anx7411_data *ctx)
1087 {
1088 	if (ctx->typec.typec_mux) {
1089 		typec_mux_unregister(ctx->typec.typec_mux);
1090 		ctx->typec.typec_mux = NULL;
1091 	}
1092 }
1093 
anx7411_unregister_switch(struct anx7411_data * ctx)1094 static void anx7411_unregister_switch(struct anx7411_data *ctx)
1095 {
1096 	if (ctx->typec.typec_switch) {
1097 		typec_switch_unregister(ctx->typec.typec_switch);
1098 		ctx->typec.typec_switch = NULL;
1099 	}
1100 }
1101 
anx7411_typec_switch_probe(struct anx7411_data * ctx,struct device * dev)1102 static int anx7411_typec_switch_probe(struct anx7411_data *ctx,
1103 				      struct device *dev)
1104 {
1105 	int ret;
1106 	struct device_node *node;
1107 
1108 	node = of_get_child_by_name(dev->of_node, "orientation_switch");
1109 	if (!node)
1110 		return 0;
1111 
1112 	ret = anx7411_register_switch(ctx, dev, &node->fwnode);
1113 	if (ret) {
1114 		dev_err(dev, "failed register switch");
1115 		return ret;
1116 	}
1117 
1118 	node = of_get_child_by_name(dev->of_node, "mode_switch");
1119 	if (!node) {
1120 		dev_err(dev, "no typec mux exist");
1121 		ret = -ENODEV;
1122 		goto unregister_switch;
1123 	}
1124 
1125 	ret = anx7411_register_mux(ctx, dev, &node->fwnode);
1126 	if (ret) {
1127 		dev_err(dev, "failed register mode switch");
1128 		ret = -ENODEV;
1129 		goto unregister_switch;
1130 	}
1131 
1132 	return 0;
1133 
1134 unregister_switch:
1135 	anx7411_unregister_switch(ctx);
1136 
1137 	return ret;
1138 }
1139 
anx7411_typec_port_probe(struct anx7411_data * ctx,struct device * dev)1140 static int anx7411_typec_port_probe(struct anx7411_data *ctx,
1141 				    struct device *dev)
1142 {
1143 	struct typec_capability *cap = &ctx->typec.caps;
1144 	struct typec_params *typecp = &ctx->typec;
1145 	struct fwnode_handle *fwnode;
1146 	const char *buf;
1147 	int ret, i;
1148 
1149 	fwnode = device_get_named_child_node(dev, "connector");
1150 	if (!fwnode)
1151 		return -EINVAL;
1152 
1153 	ret = fwnode_property_read_string(fwnode, "power-role", &buf);
1154 	if (ret) {
1155 		dev_err(dev, "power-role not found: %d\n", ret);
1156 		return ret;
1157 	}
1158 
1159 	ret = typec_find_port_power_role(buf);
1160 	if (ret < 0)
1161 		return ret;
1162 	cap->type = ret;
1163 
1164 	ret = fwnode_property_read_string(fwnode, "data-role", &buf);
1165 	if (ret) {
1166 		dev_err(dev, "data-role not found: %d\n", ret);
1167 		return ret;
1168 	}
1169 
1170 	ret = typec_find_port_data_role(buf);
1171 	if (ret < 0)
1172 		return ret;
1173 	cap->data = ret;
1174 
1175 	ret = fwnode_property_read_string(fwnode, "try-power-role", &buf);
1176 	if (ret) {
1177 		dev_err(dev, "try-power-role not found: %d\n", ret);
1178 		return ret;
1179 	}
1180 
1181 	ret = typec_find_power_role(buf);
1182 	if (ret < 0)
1183 		return ret;
1184 	cap->prefer_role = ret;
1185 
1186 	/* Get source pdos */
1187 	ret = fwnode_property_count_u32(fwnode, "source-pdos");
1188 	if (ret > 0) {
1189 		typecp->src_pdo_nr = min_t(u8, ret, PDO_MAX_OBJECTS);
1190 		ret = fwnode_property_read_u32_array(fwnode, "source-pdos",
1191 						     typecp->src_pdo,
1192 						     typecp->src_pdo_nr);
1193 		if (ret < 0) {
1194 			dev_err(dev, "source cap validate failed: %d\n", ret);
1195 			return -EINVAL;
1196 		}
1197 
1198 		typecp->caps_flags |= HAS_SOURCE_CAP;
1199 	}
1200 
1201 	ret = fwnode_property_count_u32(fwnode, "sink-pdos");
1202 	if (ret > 0) {
1203 		typecp->sink_pdo_nr = min_t(u8, ret, PDO_MAX_OBJECTS);
1204 		ret = fwnode_property_read_u32_array(fwnode, "sink-pdos",
1205 						     typecp->sink_pdo,
1206 						     typecp->sink_pdo_nr);
1207 		if (ret < 0) {
1208 			dev_err(dev, "sink cap validate failed: %d\n", ret);
1209 			return -EINVAL;
1210 		}
1211 
1212 		for (i = 0; i < typecp->sink_pdo_nr; i++) {
1213 			ret = 0;
1214 			switch (pdo_type(typecp->sink_pdo[i])) {
1215 			case PDO_TYPE_FIXED:
1216 				ret = pdo_fixed_voltage(typecp->sink_pdo[i]);
1217 				break;
1218 			case PDO_TYPE_BATT:
1219 			case PDO_TYPE_VAR:
1220 				ret = pdo_max_voltage(typecp->sink_pdo[i]);
1221 				break;
1222 			case PDO_TYPE_APDO:
1223 			default:
1224 				ret = 0;
1225 				break;
1226 			}
1227 
1228 			/* 100mv per unit */
1229 			typecp->sink_voltage = max(5000, ret) / 100;
1230 		}
1231 
1232 		typecp->caps_flags |= HAS_SINK_CAP;
1233 	}
1234 
1235 	if (!fwnode_property_read_u32(fwnode, "op-sink-microwatt", &ret)) {
1236 		typecp->sink_watt = ret / 500000; /* 500mw per unit */
1237 		typecp->caps_flags |= HAS_SINK_WATT;
1238 	}
1239 
1240 	cap->fwnode = fwnode;
1241 
1242 	ctx->typec.role_sw = usb_role_switch_get(dev);
1243 	if (IS_ERR(ctx->typec.role_sw)) {
1244 		dev_err(dev, "USB role switch not found.\n");
1245 		ctx->typec.role_sw = NULL;
1246 	}
1247 
1248 	ctx->typec.port = typec_register_port(dev, cap);
1249 	if (IS_ERR(ctx->typec.port)) {
1250 		ret = PTR_ERR(ctx->typec.port);
1251 		ctx->typec.port = NULL;
1252 		dev_err(dev, "Failed to register type c port %d\n", ret);
1253 		return ret;
1254 	}
1255 
1256 	typec_port_register_altmodes(ctx->typec.port, NULL, ctx,
1257 				     ctx->typec.port_amode,
1258 				     MAX_ALTMODE);
1259 	return 0;
1260 }
1261 
anx7411_typec_check_connection(struct anx7411_data * ctx)1262 static int anx7411_typec_check_connection(struct anx7411_data *ctx)
1263 {
1264 	int ret;
1265 
1266 	ret = anx7411_reg_read(ctx->spi_client, FW_VER);
1267 	if (ret < 0)
1268 		return 0; /* No device attached in typec port */
1269 
1270 	/* Clear interrupt and alert status */
1271 	ret = anx7411_reg_write(ctx->spi_client, INT_STS, 0);
1272 	ret |= anx7411_reg_write(ctx->tcpc_client, ALERT_0, 0xFF);
1273 	ret |= anx7411_reg_write(ctx->tcpc_client, ALERT_1, 0xFF);
1274 	if (ret)
1275 		return ret;
1276 
1277 	ret = anx7411_cc_status_detect(ctx);
1278 	ret |= anx7411_power_role_detect(ctx);
1279 	ret |= anx7411_data_role_detect(ctx);
1280 	ret |= anx7411_set_mux(ctx, SELECT_PIN_ASSIGMENT_C);
1281 	if (ret)
1282 		return ret;
1283 
1284 	ret = anx7411_send_msg(ctx, TYPE_GET_DP_ALT_ENTER, NULL, 0);
1285 	ret |= anx7411_send_msg(ctx, TYPE_GET_DP_DISCOVER_MODES_INFO, NULL, 0);
1286 
1287 	return ret;
1288 }
1289 
anx7411_runtime_pm_suspend(struct device * dev)1290 static int __maybe_unused anx7411_runtime_pm_suspend(struct device *dev)
1291 {
1292 	struct anx7411_data *ctx = dev_get_drvdata(dev);
1293 
1294 	mutex_lock(&ctx->lock);
1295 
1296 	anx7411_partner_unregister_altmode(ctx);
1297 
1298 	if (ctx->typec.partner)
1299 		anx7411_unregister_partner(ctx);
1300 
1301 	mutex_unlock(&ctx->lock);
1302 
1303 	return 0;
1304 }
1305 
anx7411_runtime_pm_resume(struct device * dev)1306 static int __maybe_unused anx7411_runtime_pm_resume(struct device *dev)
1307 {
1308 	struct anx7411_data *ctx = dev_get_drvdata(dev);
1309 
1310 	mutex_lock(&ctx->lock);
1311 	/* Detect PD connection */
1312 	if (anx7411_typec_check_connection(ctx))
1313 		dev_err(dev, "check connection");
1314 
1315 	mutex_unlock(&ctx->lock);
1316 
1317 	return 0;
1318 }
1319 
1320 static const struct dev_pm_ops anx7411_pm_ops = {
1321 	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
1322 				pm_runtime_force_resume)
1323 	SET_RUNTIME_PM_OPS(anx7411_runtime_pm_suspend,
1324 			   anx7411_runtime_pm_resume, NULL)
1325 };
1326 
anx7411_get_gpio_irq(struct anx7411_data * ctx)1327 static void anx7411_get_gpio_irq(struct anx7411_data *ctx)
1328 {
1329 	struct device *dev = &ctx->tcpc_client->dev;
1330 
1331 	ctx->intp_gpiod = devm_gpiod_get_optional(dev, "interrupt", GPIOD_IN);
1332 	if (IS_ERR_OR_NULL(ctx->intp_gpiod)) {
1333 		dev_err(dev, "no interrupt gpio property\n");
1334 		return;
1335 	}
1336 
1337 	ctx->intp_irq = gpiod_to_irq(ctx->intp_gpiod);
1338 	if (ctx->intp_irq < 0)
1339 		dev_err(dev, "failed to get GPIO IRQ\n");
1340 }
1341 
1342 static enum power_supply_usb_type anx7411_psy_usb_types[] = {
1343 	POWER_SUPPLY_USB_TYPE_C,
1344 	POWER_SUPPLY_USB_TYPE_PD,
1345 	POWER_SUPPLY_USB_TYPE_PD_PPS,
1346 };
1347 
1348 static enum power_supply_property anx7411_psy_props[] = {
1349 	POWER_SUPPLY_PROP_USB_TYPE,
1350 	POWER_SUPPLY_PROP_ONLINE,
1351 	POWER_SUPPLY_PROP_VOLTAGE_MIN,
1352 	POWER_SUPPLY_PROP_VOLTAGE_MAX,
1353 	POWER_SUPPLY_PROP_VOLTAGE_NOW,
1354 	POWER_SUPPLY_PROP_CURRENT_MAX,
1355 	POWER_SUPPLY_PROP_CURRENT_NOW,
1356 };
1357 
anx7411_psy_set_prop(struct power_supply * psy,enum power_supply_property psp,const union power_supply_propval * val)1358 static int anx7411_psy_set_prop(struct power_supply *psy,
1359 				enum power_supply_property psp,
1360 				const union power_supply_propval *val)
1361 {
1362 	struct anx7411_data *ctx = power_supply_get_drvdata(psy);
1363 	int ret = 0;
1364 
1365 	if (psp == POWER_SUPPLY_PROP_ONLINE)
1366 		ctx->psy_online = val->intval;
1367 	else
1368 		ret = -EINVAL;
1369 
1370 	power_supply_changed(ctx->psy);
1371 	return ret;
1372 }
1373 
anx7411_psy_prop_writeable(struct power_supply * psy,enum power_supply_property psp)1374 static int anx7411_psy_prop_writeable(struct power_supply *psy,
1375 				      enum power_supply_property psp)
1376 {
1377 	return psp == POWER_SUPPLY_PROP_ONLINE;
1378 }
1379 
anx7411_psy_get_prop(struct power_supply * psy,enum power_supply_property psp,union power_supply_propval * val)1380 static int anx7411_psy_get_prop(struct power_supply *psy,
1381 				enum power_supply_property psp,
1382 				union power_supply_propval *val)
1383 {
1384 	struct anx7411_data *ctx = power_supply_get_drvdata(psy);
1385 	int ret = 0;
1386 
1387 	switch (psp) {
1388 	case POWER_SUPPLY_PROP_USB_TYPE:
1389 		val->intval = ctx->usb_type;
1390 		break;
1391 	case POWER_SUPPLY_PROP_ONLINE:
1392 		val->intval = ctx->psy_online;
1393 		break;
1394 	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
1395 	case POWER_SUPPLY_PROP_VOLTAGE_MIN:
1396 	case POWER_SUPPLY_PROP_VOLTAGE_MAX:
1397 		val->intval = (ctx->psy_online) ?
1398 			ctx->typec.request_voltage * 1000 : 0;
1399 		break;
1400 	case POWER_SUPPLY_PROP_CURRENT_NOW:
1401 	case POWER_SUPPLY_PROP_CURRENT_MAX:
1402 		val->intval = (ctx->psy_online) ?
1403 			ctx->typec.request_current * 1000 : 0;
1404 		break;
1405 	default:
1406 		ret = -EINVAL;
1407 		break;
1408 	}
1409 	return ret;
1410 }
1411 
anx7411_psy_register(struct anx7411_data * ctx)1412 static int anx7411_psy_register(struct anx7411_data *ctx)
1413 {
1414 	struct power_supply_desc *psy_desc = &ctx->psy_desc;
1415 	struct power_supply_config psy_cfg = {};
1416 	char *psy_name;
1417 
1418 	psy_name = devm_kasprintf(ctx->dev, GFP_KERNEL, "anx7411-source-psy-%s",
1419 				  dev_name(ctx->dev));
1420 	if (!psy_name)
1421 		return -ENOMEM;
1422 
1423 	psy_desc->name = psy_name;
1424 	psy_desc->type = POWER_SUPPLY_TYPE_USB;
1425 	psy_desc->usb_types = anx7411_psy_usb_types;
1426 	psy_desc->num_usb_types = ARRAY_SIZE(anx7411_psy_usb_types);
1427 	psy_desc->properties = anx7411_psy_props;
1428 	psy_desc->num_properties = ARRAY_SIZE(anx7411_psy_props);
1429 
1430 	psy_desc->get_property = anx7411_psy_get_prop;
1431 	psy_desc->set_property = anx7411_psy_set_prop;
1432 	psy_desc->property_is_writeable = anx7411_psy_prop_writeable;
1433 
1434 	ctx->usb_type = POWER_SUPPLY_USB_TYPE_C;
1435 	ctx->psy = devm_power_supply_register(ctx->dev, psy_desc, &psy_cfg);
1436 
1437 	if (IS_ERR(ctx->psy))
1438 		dev_warn(ctx->dev, "unable to register psy\n");
1439 
1440 	return PTR_ERR_OR_ZERO(ctx->psy);
1441 }
1442 
anx7411_i2c_probe(struct i2c_client * client)1443 static int anx7411_i2c_probe(struct i2c_client *client)
1444 {
1445 	struct anx7411_data *plat;
1446 	struct device *dev = &client->dev;
1447 	int ret;
1448 
1449 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_I2C_BLOCK))
1450 		return -ENODEV;
1451 
1452 	plat = devm_kzalloc(dev, sizeof(*plat), GFP_KERNEL);
1453 	if (!plat)
1454 		return -ENOMEM;
1455 
1456 	plat->tcpc_client = client;
1457 	i2c_set_clientdata(client, plat);
1458 
1459 	mutex_init(&plat->lock);
1460 
1461 	ret = anx7411_register_i2c_dummy_clients(plat, client);
1462 	if (ret) {
1463 		dev_err(dev, "fail to reserve I2C bus\n");
1464 		return ret;
1465 	}
1466 
1467 	ret = anx7411_typec_switch_probe(plat, dev);
1468 	if (ret) {
1469 		dev_err(dev, "fail to probe typec switch\n");
1470 		goto free_i2c_dummy;
1471 	}
1472 
1473 	ret = anx7411_typec_port_probe(plat, dev);
1474 	if (ret) {
1475 		dev_err(dev, "fail to probe typec property.\n");
1476 		ret = -ENODEV;
1477 		goto free_typec_switch;
1478 	}
1479 
1480 	plat->intp_irq = client->irq;
1481 	if (!client->irq)
1482 		anx7411_get_gpio_irq(plat);
1483 
1484 	if (!plat->intp_irq) {
1485 		dev_err(dev, "fail to get interrupt IRQ\n");
1486 		ret = -EINVAL;
1487 		goto free_typec_port;
1488 	}
1489 
1490 	plat->dev = dev;
1491 	plat->psy_online = ANX7411_PSY_OFFLINE;
1492 	ret = anx7411_psy_register(plat);
1493 	if (ret) {
1494 		dev_err(dev, "register psy\n");
1495 		goto free_typec_port;
1496 	}
1497 
1498 	INIT_WORK(&plat->work, anx7411_work_func);
1499 	plat->workqueue = alloc_workqueue("anx7411_work",
1500 					  WQ_FREEZABLE |
1501 					  WQ_MEM_RECLAIM,
1502 					  1);
1503 	if (!plat->workqueue) {
1504 		dev_err(dev, "fail to create work queue\n");
1505 		ret = -ENOMEM;
1506 		goto free_typec_port;
1507 	}
1508 
1509 	ret = devm_request_threaded_irq(dev, plat->intp_irq,
1510 					NULL, anx7411_intr_isr,
1511 					IRQF_TRIGGER_FALLING |
1512 					IRQF_ONESHOT,
1513 					"anx7411-intp", plat);
1514 	if (ret) {
1515 		dev_err(dev, "fail to request irq\n");
1516 		goto free_wq;
1517 	}
1518 
1519 	if (anx7411_typec_check_connection(plat))
1520 		dev_err(dev, "check status\n");
1521 
1522 	pm_runtime_enable(dev);
1523 
1524 	return 0;
1525 
1526 free_wq:
1527 	destroy_workqueue(plat->workqueue);
1528 
1529 free_typec_port:
1530 	typec_unregister_port(plat->typec.port);
1531 	anx7411_port_unregister_altmodes(plat->typec.port_amode);
1532 
1533 free_typec_switch:
1534 	anx7411_unregister_switch(plat);
1535 	anx7411_unregister_mux(plat);
1536 
1537 free_i2c_dummy:
1538 	i2c_unregister_device(plat->spi_client);
1539 
1540 	return ret;
1541 }
1542 
anx7411_i2c_remove(struct i2c_client * client)1543 static void anx7411_i2c_remove(struct i2c_client *client)
1544 {
1545 	struct anx7411_data *plat = i2c_get_clientdata(client);
1546 
1547 	anx7411_partner_unregister_altmode(plat);
1548 	anx7411_unregister_partner(plat);
1549 
1550 	if (plat->workqueue)
1551 		destroy_workqueue(plat->workqueue);
1552 
1553 	if (plat->spi_client)
1554 		i2c_unregister_device(plat->spi_client);
1555 
1556 	if (plat->typec.role_sw)
1557 		usb_role_switch_put(plat->typec.role_sw);
1558 
1559 	anx7411_unregister_mux(plat);
1560 
1561 	anx7411_unregister_switch(plat);
1562 
1563 	if (plat->typec.port)
1564 		typec_unregister_port(plat->typec.port);
1565 
1566 	anx7411_port_unregister_altmodes(plat->typec.port_amode);
1567 }
1568 
1569 static const struct i2c_device_id anx7411_id[] = {
1570 	{"anx7411", 0},
1571 	{}
1572 };
1573 
1574 MODULE_DEVICE_TABLE(i2c, anx7411_id);
1575 
1576 static const struct of_device_id anx_match_table[] = {
1577 	{.compatible = "analogix,anx7411",},
1578 	{},
1579 };
1580 
1581 static struct i2c_driver anx7411_driver = {
1582 	.driver = {
1583 		.name = "anx7411",
1584 		.of_match_table = anx_match_table,
1585 		.pm = &anx7411_pm_ops,
1586 	},
1587 	.probe = anx7411_i2c_probe,
1588 	.remove = anx7411_i2c_remove,
1589 
1590 	.id_table = anx7411_id,
1591 };
1592 
1593 module_i2c_driver(anx7411_driver);
1594 
1595 MODULE_DESCRIPTION("Anx7411 USB Type-C PD driver");
1596 MODULE_AUTHOR("Xin Ji <xji@analogixsemi.com>");
1597 MODULE_LICENSE("GPL");
1598 MODULE_VERSION("0.1.5");
1599