1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* |
3 | * STMicroelectronics STUSB160x Type-C controller family driver |
4 | * |
5 | * Copyright (C) 2020, STMicroelectronics |
6 | * Author(s): Amelie Delaunay <amelie.delaunay@st.com> |
7 | */ |
8 | |
9 | #include <linux/bitfield.h> |
10 | #include <linux/i2c.h> |
11 | #include <linux/interrupt.h> |
12 | #include <linux/kernel.h> |
13 | #include <linux/module.h> |
14 | #include <linux/regmap.h> |
15 | #include <linux/regulator/consumer.h> |
16 | #include <linux/usb/role.h> |
17 | #include <linux/usb/typec.h> |
18 | |
19 | #define STUSB160X_ALERT_STATUS 0x0B /* RC */ |
20 | #define STUSB160X_ALERT_STATUS_MASK_CTRL 0x0C /* RW */ |
21 | #define STUSB160X_CC_CONNECTION_STATUS_TRANS 0x0D /* RC */ |
22 | #define STUSB160X_CC_CONNECTION_STATUS 0x0E /* RO */ |
23 | #define STUSB160X_MONITORING_STATUS_TRANS 0x0F /* RC */ |
24 | #define STUSB160X_MONITORING_STATUS 0x10 /* RO */ |
25 | #define STUSB160X_CC_OPERATION_STATUS 0x11 /* RO */ |
26 | #define STUSB160X_HW_FAULT_STATUS_TRANS 0x12 /* RC */ |
27 | #define STUSB160X_HW_FAULT_STATUS 0x13 /* RO */ |
28 | #define STUSB160X_CC_CAPABILITY_CTRL 0x18 /* RW */ |
29 | #define STUSB160X_CC_VCONN_SWITCH_CTRL 0x1E /* RW */ |
30 | #define STUSB160X_VCONN_MONITORING_CTRL 0x20 /* RW */ |
31 | #define STUSB160X_VBUS_MONITORING_RANGE_CTRL 0x22 /* RW */ |
32 | #define STUSB160X_RESET_CTRL 0x23 /* RW */ |
33 | #define STUSB160X_VBUS_DISCHARGE_TIME_CTRL 0x25 /* RW */ |
34 | #define STUSB160X_VBUS_DISCHARGE_STATUS 0x26 /* RO */ |
35 | #define STUSB160X_VBUS_ENABLE_STATUS 0x27 /* RO */ |
36 | #define STUSB160X_CC_POWER_MODE_CTRL 0x28 /* RW */ |
37 | #define STUSB160X_VBUS_MONITORING_CTRL 0x2E /* RW */ |
38 | #define STUSB1600_REG_MAX 0x2F /* RO - Reserved */ |
39 | |
40 | /* STUSB160X_ALERT_STATUS/STUSB160X_ALERT_STATUS_MASK_CTRL bitfields */ |
41 | #define STUSB160X_HW_FAULT BIT(4) |
42 | #define STUSB160X_MONITORING BIT(5) |
43 | #define STUSB160X_CC_CONNECTION BIT(6) |
44 | #define STUSB160X_ALL_ALERTS GENMASK(6, 4) |
45 | |
46 | /* STUSB160X_CC_CONNECTION_STATUS_TRANS bitfields */ |
47 | #define STUSB160X_CC_ATTACH_TRANS BIT(0) |
48 | |
49 | /* STUSB160X_CC_CONNECTION_STATUS bitfields */ |
50 | #define STUSB160X_CC_ATTACH BIT(0) |
51 | #define STUSB160X_CC_VCONN_SUPPLY BIT(1) |
52 | #define STUSB160X_CC_DATA_ROLE(s) (!!((s) & BIT(2))) |
53 | #define STUSB160X_CC_POWER_ROLE(s) (!!((s) & BIT(3))) |
54 | #define STUSB160X_CC_ATTACHED_MODE GENMASK(7, 5) |
55 | |
56 | /* STUSB160X_MONITORING_STATUS_TRANS bitfields */ |
57 | #define STUSB160X_VCONN_PRESENCE_TRANS BIT(0) |
58 | #define STUSB160X_VBUS_PRESENCE_TRANS BIT(1) |
59 | #define STUSB160X_VBUS_VSAFE0V_TRANS BIT(2) |
60 | #define STUSB160X_VBUS_VALID_TRANS BIT(3) |
61 | |
62 | /* STUSB160X_MONITORING_STATUS bitfields */ |
63 | #define STUSB160X_VCONN_PRESENCE BIT(0) |
64 | #define STUSB160X_VBUS_PRESENCE BIT(1) |
65 | #define STUSB160X_VBUS_VSAFE0V BIT(2) |
66 | #define STUSB160X_VBUS_VALID BIT(3) |
67 | |
68 | /* STUSB160X_CC_OPERATION_STATUS bitfields */ |
69 | #define STUSB160X_TYPEC_FSM_STATE GENMASK(4, 0) |
70 | #define STUSB160X_SINK_POWER_STATE GENMASK(6, 5) |
71 | #define STUSB160X_CC_ATTACHED BIT(7) |
72 | |
73 | /* STUSB160X_HW_FAULT_STATUS_TRANS bitfields */ |
74 | #define STUSB160X_VCONN_SW_OVP_FAULT_TRANS BIT(0) |
75 | #define STUSB160X_VCONN_SW_OCP_FAULT_TRANS BIT(1) |
76 | #define STUSB160X_VCONN_SW_RVP_FAULT_TRANS BIT(2) |
77 | #define STUSB160X_VPU_VALID_TRANS BIT(4) |
78 | #define STUSB160X_VPU_OVP_FAULT_TRANS BIT(5) |
79 | #define STUSB160X_THERMAL_FAULT BIT(7) |
80 | |
81 | /* STUSB160X_HW_FAULT_STATUS bitfields */ |
82 | #define STUSB160X_VCONN_SW_OVP_FAULT_CC2 BIT(0) |
83 | #define STUSB160X_VCONN_SW_OVP_FAULT_CC1 BIT(1) |
84 | #define STUSB160X_VCONN_SW_OCP_FAULT_CC2 BIT(2) |
85 | #define STUSB160X_VCONN_SW_OCP_FAULT_CC1 BIT(3) |
86 | #define STUSB160X_VCONN_SW_RVP_FAULT_CC2 BIT(4) |
87 | #define STUSB160X_VCONN_SW_RVP_FAULT_CC1 BIT(5) |
88 | #define STUSB160X_VPU_VALID BIT(6) |
89 | #define STUSB160X_VPU_OVP_FAULT BIT(7) |
90 | |
91 | /* STUSB160X_CC_CAPABILITY_CTRL bitfields */ |
92 | #define STUSB160X_CC_VCONN_SUPPLY_EN BIT(0) |
93 | #define STUSB160X_CC_VCONN_DISCHARGE_EN BIT(4) |
94 | #define STUSB160X_CC_CURRENT_ADVERTISED GENMASK(7, 6) |
95 | |
96 | /* STUSB160X_VCONN_SWITCH_CTRL bitfields */ |
97 | #define STUSB160X_CC_VCONN_SWITCH_ILIM GENMASK(3, 0) |
98 | |
99 | /* STUSB160X_VCONN_MONITORING_CTRL bitfields */ |
100 | #define STUSB160X_VCONN_UVLO_THRESHOLD BIT(6) |
101 | #define STUSB160X_VCONN_MONITORING_EN BIT(7) |
102 | |
103 | /* STUSB160X_VBUS_MONITORING_RANGE_CTRL bitfields */ |
104 | #define STUSB160X_SHIFT_LOW_VBUS_LIMIT GENMASK(3, 0) |
105 | #define STUSB160X_SHIFT_HIGH_VBUS_LIMIT GENMASK(7, 4) |
106 | |
107 | /* STUSB160X_RESET_CTRL bitfields */ |
108 | #define STUSB160X_SW_RESET_EN BIT(0) |
109 | |
110 | /* STUSB160X_VBUS_DISCHARGE_TIME_CTRL bitfields */ |
111 | #define STUSBXX02_VBUS_DISCHARGE_TIME_TO_PDO GENMASK(3, 0) |
112 | #define STUSB160X_VBUS_DISCHARGE_TIME_TO_0V GENMASK(7, 4) |
113 | |
114 | /* STUSB160X_VBUS_DISCHARGE_STATUS bitfields */ |
115 | #define STUSB160X_VBUS_DISCHARGE_EN BIT(7) |
116 | |
117 | /* STUSB160X_VBUS_ENABLE_STATUS bitfields */ |
118 | #define STUSB160X_VBUS_SOURCE_EN BIT(0) |
119 | #define STUSB160X_VBUS_SINK_EN BIT(1) |
120 | |
121 | /* STUSB160X_CC_POWER_MODE_CTRL bitfields */ |
122 | #define STUSB160X_CC_POWER_MODE GENMASK(2, 0) |
123 | |
124 | /* STUSB160X_VBUS_MONITORING_CTRL bitfields */ |
125 | #define STUSB160X_VDD_UVLO_DISABLE BIT(0) |
126 | #define STUSB160X_VBUS_VSAFE0V_THRESHOLD GENMASK(2, 1) |
127 | #define STUSB160X_VBUS_RANGE_DISABLE BIT(4) |
128 | #define STUSB160X_VDD_OVLO_DISABLE BIT(6) |
129 | |
130 | enum stusb160x_pwr_mode { |
131 | SOURCE_WITH_ACCESSORY, |
132 | SINK_WITH_ACCESSORY, |
133 | SINK_WITHOUT_ACCESSORY, |
134 | DUAL_WITH_ACCESSORY, |
135 | DUAL_WITH_ACCESSORY_AND_TRY_SRC, |
136 | DUAL_WITH_ACCESSORY_AND_TRY_SNK, |
137 | }; |
138 | |
139 | enum stusb160x_attached_mode { |
140 | NO_DEVICE_ATTACHED, |
141 | SINK_ATTACHED, |
142 | SOURCE_ATTACHED, |
143 | DEBUG_ACCESSORY_ATTACHED, |
144 | AUDIO_ACCESSORY_ATTACHED, |
145 | }; |
146 | |
147 | struct stusb160x { |
148 | struct device *dev; |
149 | struct regmap *regmap; |
150 | struct regulator *vdd_supply; |
151 | struct regulator *vsys_supply; |
152 | struct regulator *vconn_supply; |
153 | struct regulator *main_supply; |
154 | |
155 | struct typec_port *port; |
156 | struct typec_capability capability; |
157 | struct typec_partner *partner; |
158 | |
159 | enum typec_port_type port_type; |
160 | enum typec_pwr_opmode pwr_opmode; |
161 | bool vbus_on; |
162 | |
163 | struct usb_role_switch *role_sw; |
164 | }; |
165 | |
166 | static bool stusb160x_reg_writeable(struct device *dev, unsigned int reg) |
167 | { |
168 | switch (reg) { |
169 | case STUSB160X_ALERT_STATUS_MASK_CTRL: |
170 | case STUSB160X_CC_CAPABILITY_CTRL: |
171 | case STUSB160X_CC_VCONN_SWITCH_CTRL: |
172 | case STUSB160X_VCONN_MONITORING_CTRL: |
173 | case STUSB160X_VBUS_MONITORING_RANGE_CTRL: |
174 | case STUSB160X_RESET_CTRL: |
175 | case STUSB160X_VBUS_DISCHARGE_TIME_CTRL: |
176 | case STUSB160X_CC_POWER_MODE_CTRL: |
177 | case STUSB160X_VBUS_MONITORING_CTRL: |
178 | return true; |
179 | default: |
180 | return false; |
181 | } |
182 | } |
183 | |
184 | static bool stusb160x_reg_readable(struct device *dev, unsigned int reg) |
185 | { |
186 | if (reg <= 0x0A || |
187 | (reg >= 0x14 && reg <= 0x17) || |
188 | (reg >= 0x19 && reg <= 0x1D) || |
189 | (reg >= 0x29 && reg <= 0x2D) || |
190 | (reg == 0x1F || reg == 0x21 || reg == 0x24 || reg == 0x2F)) |
191 | return false; |
192 | else |
193 | return true; |
194 | } |
195 | |
196 | static bool stusb160x_reg_volatile(struct device *dev, unsigned int reg) |
197 | { |
198 | switch (reg) { |
199 | case STUSB160X_ALERT_STATUS: |
200 | case STUSB160X_CC_CONNECTION_STATUS_TRANS: |
201 | case STUSB160X_CC_CONNECTION_STATUS: |
202 | case STUSB160X_MONITORING_STATUS_TRANS: |
203 | case STUSB160X_MONITORING_STATUS: |
204 | case STUSB160X_CC_OPERATION_STATUS: |
205 | case STUSB160X_HW_FAULT_STATUS_TRANS: |
206 | case STUSB160X_HW_FAULT_STATUS: |
207 | case STUSB160X_VBUS_DISCHARGE_STATUS: |
208 | case STUSB160X_VBUS_ENABLE_STATUS: |
209 | return true; |
210 | default: |
211 | return false; |
212 | } |
213 | } |
214 | |
215 | static bool stusb160x_reg_precious(struct device *dev, unsigned int reg) |
216 | { |
217 | switch (reg) { |
218 | case STUSB160X_ALERT_STATUS: |
219 | case STUSB160X_CC_CONNECTION_STATUS_TRANS: |
220 | case STUSB160X_MONITORING_STATUS_TRANS: |
221 | case STUSB160X_HW_FAULT_STATUS_TRANS: |
222 | return true; |
223 | default: |
224 | return false; |
225 | } |
226 | } |
227 | |
228 | static const struct regmap_config stusb1600_regmap_config = { |
229 | .reg_bits = 8, |
230 | .reg_stride = 1, |
231 | .val_bits = 8, |
232 | .max_register = STUSB1600_REG_MAX, |
233 | .writeable_reg = stusb160x_reg_writeable, |
234 | .readable_reg = stusb160x_reg_readable, |
235 | .volatile_reg = stusb160x_reg_volatile, |
236 | .precious_reg = stusb160x_reg_precious, |
237 | .cache_type = REGCACHE_RBTREE, |
238 | }; |
239 | |
240 | static bool stusb160x_get_vconn(struct stusb160x *chip) |
241 | { |
242 | u32 val; |
243 | int ret; |
244 | |
245 | ret = regmap_read(map: chip->regmap, STUSB160X_CC_CAPABILITY_CTRL, val: &val); |
246 | if (ret) { |
247 | dev_err(chip->dev, "Unable to get Vconn status: %d\n" , ret); |
248 | return false; |
249 | } |
250 | |
251 | return !!FIELD_GET(STUSB160X_CC_VCONN_SUPPLY_EN, val); |
252 | } |
253 | |
254 | static int stusb160x_set_vconn(struct stusb160x *chip, bool on) |
255 | { |
256 | int ret; |
257 | |
258 | /* Manage VCONN input supply */ |
259 | if (chip->vconn_supply) { |
260 | if (on) { |
261 | ret = regulator_enable(regulator: chip->vconn_supply); |
262 | if (ret) { |
263 | dev_err(chip->dev, |
264 | "failed to enable vconn supply: %d\n" , |
265 | ret); |
266 | return ret; |
267 | } |
268 | } else { |
269 | regulator_disable(regulator: chip->vconn_supply); |
270 | } |
271 | } |
272 | |
273 | /* Manage VCONN monitoring and power path */ |
274 | ret = regmap_update_bits(map: chip->regmap, STUSB160X_VCONN_MONITORING_CTRL, |
275 | STUSB160X_VCONN_MONITORING_EN, |
276 | val: on ? STUSB160X_VCONN_MONITORING_EN : 0); |
277 | if (ret) |
278 | goto vconn_reg_disable; |
279 | |
280 | return 0; |
281 | |
282 | vconn_reg_disable: |
283 | if (chip->vconn_supply && on) |
284 | regulator_disable(regulator: chip->vconn_supply); |
285 | |
286 | return ret; |
287 | } |
288 | |
289 | static enum typec_pwr_opmode stusb160x_get_pwr_opmode(struct stusb160x *chip) |
290 | { |
291 | u32 val; |
292 | int ret; |
293 | |
294 | ret = regmap_read(map: chip->regmap, STUSB160X_CC_CAPABILITY_CTRL, val: &val); |
295 | if (ret) { |
296 | dev_err(chip->dev, "Unable to get pwr opmode: %d\n" , ret); |
297 | return TYPEC_PWR_MODE_USB; |
298 | } |
299 | |
300 | return FIELD_GET(STUSB160X_CC_CURRENT_ADVERTISED, val); |
301 | } |
302 | |
303 | static enum typec_accessory stusb160x_get_accessory(u32 status) |
304 | { |
305 | enum stusb160x_attached_mode mode; |
306 | |
307 | mode = FIELD_GET(STUSB160X_CC_ATTACHED_MODE, status); |
308 | |
309 | switch (mode) { |
310 | case DEBUG_ACCESSORY_ATTACHED: |
311 | return TYPEC_ACCESSORY_DEBUG; |
312 | case AUDIO_ACCESSORY_ATTACHED: |
313 | return TYPEC_ACCESSORY_AUDIO; |
314 | default: |
315 | return TYPEC_ACCESSORY_NONE; |
316 | } |
317 | } |
318 | |
319 | static enum typec_role stusb160x_get_vconn_role(u32 status) |
320 | { |
321 | if (FIELD_GET(STUSB160X_CC_VCONN_SUPPLY, status)) |
322 | return TYPEC_SOURCE; |
323 | |
324 | return TYPEC_SINK; |
325 | } |
326 | |
327 | static void stusb160x_set_data_role(struct stusb160x *chip, |
328 | enum typec_data_role data_role, |
329 | bool attached) |
330 | { |
331 | enum usb_role usb_role = USB_ROLE_NONE; |
332 | |
333 | if (attached) { |
334 | if (data_role == TYPEC_HOST) |
335 | usb_role = USB_ROLE_HOST; |
336 | else |
337 | usb_role = USB_ROLE_DEVICE; |
338 | } |
339 | |
340 | usb_role_switch_set_role(sw: chip->role_sw, role: usb_role); |
341 | typec_set_data_role(port: chip->port, role: data_role); |
342 | } |
343 | |
344 | static int stusb160x_attach(struct stusb160x *chip, u32 status) |
345 | { |
346 | struct typec_partner_desc desc; |
347 | int ret; |
348 | |
349 | if ((STUSB160X_CC_POWER_ROLE(status) == TYPEC_SOURCE) && |
350 | chip->vdd_supply) { |
351 | ret = regulator_enable(regulator: chip->vdd_supply); |
352 | if (ret) { |
353 | dev_err(chip->dev, |
354 | "Failed to enable Vbus supply: %d\n" , ret); |
355 | return ret; |
356 | } |
357 | chip->vbus_on = true; |
358 | } |
359 | |
360 | desc.usb_pd = false; |
361 | desc.accessory = stusb160x_get_accessory(status); |
362 | desc.identity = NULL; |
363 | |
364 | chip->partner = typec_register_partner(port: chip->port, desc: &desc); |
365 | if (IS_ERR(ptr: chip->partner)) { |
366 | ret = PTR_ERR(ptr: chip->partner); |
367 | goto vbus_disable; |
368 | } |
369 | |
370 | typec_set_pwr_role(port: chip->port, STUSB160X_CC_POWER_ROLE(status)); |
371 | typec_set_pwr_opmode(port: chip->port, mode: stusb160x_get_pwr_opmode(chip)); |
372 | typec_set_vconn_role(port: chip->port, role: stusb160x_get_vconn_role(status)); |
373 | stusb160x_set_data_role(chip, STUSB160X_CC_DATA_ROLE(status), attached: true); |
374 | |
375 | return 0; |
376 | |
377 | vbus_disable: |
378 | if (chip->vbus_on) { |
379 | regulator_disable(regulator: chip->vdd_supply); |
380 | chip->vbus_on = false; |
381 | } |
382 | |
383 | return ret; |
384 | } |
385 | |
386 | static void stusb160x_detach(struct stusb160x *chip, u32 status) |
387 | { |
388 | typec_unregister_partner(partner: chip->partner); |
389 | chip->partner = NULL; |
390 | |
391 | typec_set_pwr_role(port: chip->port, STUSB160X_CC_POWER_ROLE(status)); |
392 | typec_set_pwr_opmode(port: chip->port, mode: TYPEC_PWR_MODE_USB); |
393 | typec_set_vconn_role(port: chip->port, role: stusb160x_get_vconn_role(status)); |
394 | stusb160x_set_data_role(chip, STUSB160X_CC_DATA_ROLE(status), attached: false); |
395 | |
396 | if (chip->vbus_on) { |
397 | regulator_disable(regulator: chip->vdd_supply); |
398 | chip->vbus_on = false; |
399 | } |
400 | } |
401 | |
402 | static irqreturn_t stusb160x_irq_handler(int irq, void *data) |
403 | { |
404 | struct stusb160x *chip = data; |
405 | u32 pending, trans, status; |
406 | int ret; |
407 | |
408 | ret = regmap_read(map: chip->regmap, STUSB160X_ALERT_STATUS, val: &pending); |
409 | if (ret) |
410 | goto err; |
411 | |
412 | if (pending & STUSB160X_CC_CONNECTION) { |
413 | ret = regmap_read(map: chip->regmap, |
414 | STUSB160X_CC_CONNECTION_STATUS_TRANS, val: &trans); |
415 | if (ret) |
416 | goto err; |
417 | ret = regmap_read(map: chip->regmap, |
418 | STUSB160X_CC_CONNECTION_STATUS, val: &status); |
419 | if (ret) |
420 | goto err; |
421 | |
422 | if (trans & STUSB160X_CC_ATTACH_TRANS) { |
423 | if (status & STUSB160X_CC_ATTACH) { |
424 | ret = stusb160x_attach(chip, status); |
425 | if (ret) |
426 | goto err; |
427 | } else { |
428 | stusb160x_detach(chip, status); |
429 | } |
430 | } |
431 | } |
432 | err: |
433 | return IRQ_HANDLED; |
434 | } |
435 | |
436 | static int stusb160x_irq_init(struct stusb160x *chip, int irq) |
437 | { |
438 | u32 status; |
439 | int ret; |
440 | |
441 | ret = regmap_read(map: chip->regmap, |
442 | STUSB160X_CC_CONNECTION_STATUS, val: &status); |
443 | if (ret) |
444 | return ret; |
445 | |
446 | if (status & STUSB160X_CC_ATTACH) { |
447 | ret = stusb160x_attach(chip, status); |
448 | if (ret) |
449 | dev_err(chip->dev, "attach failed: %d\n" , ret); |
450 | } |
451 | |
452 | ret = devm_request_threaded_irq(dev: chip->dev, irq, NULL, |
453 | thread_fn: stusb160x_irq_handler, IRQF_ONESHOT, |
454 | devname: dev_name(dev: chip->dev), dev_id: chip); |
455 | if (ret) |
456 | goto partner_unregister; |
457 | |
458 | /* Unmask CC_CONNECTION events */ |
459 | ret = regmap_write_bits(map: chip->regmap, STUSB160X_ALERT_STATUS_MASK_CTRL, |
460 | STUSB160X_CC_CONNECTION, val: 0); |
461 | if (ret) |
462 | goto partner_unregister; |
463 | |
464 | return 0; |
465 | |
466 | partner_unregister: |
467 | if (chip->partner) { |
468 | typec_unregister_partner(partner: chip->partner); |
469 | chip->partner = NULL; |
470 | } |
471 | |
472 | return ret; |
473 | } |
474 | |
475 | static int stusb160x_chip_init(struct stusb160x *chip) |
476 | { |
477 | u32 val; |
478 | int ret; |
479 | |
480 | /* Change the default Type-C power mode */ |
481 | if (chip->port_type == TYPEC_PORT_SRC) |
482 | ret = regmap_update_bits(map: chip->regmap, |
483 | STUSB160X_CC_POWER_MODE_CTRL, |
484 | STUSB160X_CC_POWER_MODE, |
485 | val: SOURCE_WITH_ACCESSORY); |
486 | else if (chip->port_type == TYPEC_PORT_SNK) |
487 | ret = regmap_update_bits(map: chip->regmap, |
488 | STUSB160X_CC_POWER_MODE_CTRL, |
489 | STUSB160X_CC_POWER_MODE, |
490 | val: SINK_WITH_ACCESSORY); |
491 | else /* (chip->port_type == TYPEC_PORT_DRP) */ |
492 | ret = regmap_update_bits(map: chip->regmap, |
493 | STUSB160X_CC_POWER_MODE_CTRL, |
494 | STUSB160X_CC_POWER_MODE, |
495 | val: DUAL_WITH_ACCESSORY); |
496 | if (ret) |
497 | return ret; |
498 | |
499 | if (chip->port_type == TYPEC_PORT_SNK) |
500 | goto skip_src; |
501 | |
502 | /* Change the default Type-C Source power operation mode capability */ |
503 | ret = regmap_update_bits(map: chip->regmap, STUSB160X_CC_CAPABILITY_CTRL, |
504 | STUSB160X_CC_CURRENT_ADVERTISED, |
505 | FIELD_PREP(STUSB160X_CC_CURRENT_ADVERTISED, |
506 | chip->pwr_opmode)); |
507 | if (ret) |
508 | return ret; |
509 | |
510 | /* Manage Type-C Source Vconn supply */ |
511 | if (stusb160x_get_vconn(chip)) { |
512 | ret = stusb160x_set_vconn(chip, on: true); |
513 | if (ret) |
514 | return ret; |
515 | } |
516 | |
517 | skip_src: |
518 | /* Mask all events interrupts - to be unmasked with interrupt support */ |
519 | ret = regmap_update_bits(map: chip->regmap, STUSB160X_ALERT_STATUS_MASK_CTRL, |
520 | STUSB160X_ALL_ALERTS, STUSB160X_ALL_ALERTS); |
521 | if (ret) |
522 | return ret; |
523 | |
524 | /* Read status at least once to clear any stale interrupts */ |
525 | regmap_read(map: chip->regmap, STUSB160X_ALERT_STATUS, val: &val); |
526 | regmap_read(map: chip->regmap, STUSB160X_CC_CONNECTION_STATUS_TRANS, val: &val); |
527 | regmap_read(map: chip->regmap, STUSB160X_MONITORING_STATUS_TRANS, val: &val); |
528 | regmap_read(map: chip->regmap, STUSB160X_HW_FAULT_STATUS_TRANS, val: &val); |
529 | |
530 | return 0; |
531 | } |
532 | |
533 | static int stusb160x_get_fw_caps(struct stusb160x *chip, |
534 | struct fwnode_handle *fwnode) |
535 | { |
536 | const char *cap_str; |
537 | int ret; |
538 | |
539 | chip->capability.fwnode = fwnode; |
540 | |
541 | /* |
542 | * Supported port type can be configured through device tree |
543 | * else it is read from chip registers in stusb160x_get_caps. |
544 | */ |
545 | ret = fwnode_property_read_string(fwnode, propname: "power-role" , val: &cap_str); |
546 | if (!ret) { |
547 | ret = typec_find_port_power_role(name: cap_str); |
548 | if (ret < 0) |
549 | return ret; |
550 | chip->port_type = ret; |
551 | } |
552 | chip->capability.type = chip->port_type; |
553 | |
554 | /* Skip DRP/Source capabilities in case of Sink only */ |
555 | if (chip->port_type == TYPEC_PORT_SNK) |
556 | return 0; |
557 | |
558 | if (chip->port_type == TYPEC_PORT_DRP) |
559 | chip->capability.prefer_role = TYPEC_SINK; |
560 | |
561 | /* |
562 | * Supported power operation mode can be configured through device tree |
563 | * else it is read from chip registers in stusb160x_get_caps. |
564 | */ |
565 | ret = fwnode_property_read_string(fwnode, propname: "typec-power-opmode" , val: &cap_str); |
566 | if (!ret) { |
567 | ret = typec_find_pwr_opmode(name: cap_str); |
568 | /* Power delivery not yet supported */ |
569 | if (ret < 0 || ret == TYPEC_PWR_MODE_PD) { |
570 | dev_err(chip->dev, "bad power operation mode: %d\n" , ret); |
571 | return -EINVAL; |
572 | } |
573 | chip->pwr_opmode = ret; |
574 | } |
575 | |
576 | return 0; |
577 | } |
578 | |
579 | static int stusb160x_get_caps(struct stusb160x *chip) |
580 | { |
581 | enum typec_port_type *type = &chip->capability.type; |
582 | enum typec_port_data *data = &chip->capability.data; |
583 | enum typec_accessory *accessory = chip->capability.accessory; |
584 | u32 val; |
585 | int ret; |
586 | |
587 | chip->capability.revision = USB_TYPEC_REV_1_2; |
588 | |
589 | ret = regmap_read(map: chip->regmap, STUSB160X_CC_POWER_MODE_CTRL, val: &val); |
590 | if (ret) |
591 | return ret; |
592 | |
593 | switch (FIELD_GET(STUSB160X_CC_POWER_MODE, val)) { |
594 | case SOURCE_WITH_ACCESSORY: |
595 | *type = TYPEC_PORT_SRC; |
596 | *data = TYPEC_PORT_DFP; |
597 | *accessory++ = TYPEC_ACCESSORY_AUDIO; |
598 | *accessory++ = TYPEC_ACCESSORY_DEBUG; |
599 | break; |
600 | case SINK_WITH_ACCESSORY: |
601 | *type = TYPEC_PORT_SNK; |
602 | *data = TYPEC_PORT_UFP; |
603 | *accessory++ = TYPEC_ACCESSORY_AUDIO; |
604 | *accessory++ = TYPEC_ACCESSORY_DEBUG; |
605 | break; |
606 | case SINK_WITHOUT_ACCESSORY: |
607 | *type = TYPEC_PORT_SNK; |
608 | *data = TYPEC_PORT_UFP; |
609 | break; |
610 | case DUAL_WITH_ACCESSORY: |
611 | case DUAL_WITH_ACCESSORY_AND_TRY_SRC: |
612 | case DUAL_WITH_ACCESSORY_AND_TRY_SNK: |
613 | *type = TYPEC_PORT_DRP; |
614 | *data = TYPEC_PORT_DRD; |
615 | *accessory++ = TYPEC_ACCESSORY_AUDIO; |
616 | *accessory++ = TYPEC_ACCESSORY_DEBUG; |
617 | break; |
618 | default: |
619 | return -EINVAL; |
620 | } |
621 | |
622 | chip->port_type = *type; |
623 | chip->pwr_opmode = stusb160x_get_pwr_opmode(chip); |
624 | |
625 | return 0; |
626 | } |
627 | |
628 | static const struct of_device_id stusb160x_of_match[] = { |
629 | { .compatible = "st,stusb1600" , .data = &stusb1600_regmap_config}, |
630 | {}, |
631 | }; |
632 | MODULE_DEVICE_TABLE(of, stusb160x_of_match); |
633 | |
634 | static int stusb160x_probe(struct i2c_client *client) |
635 | { |
636 | struct stusb160x *chip; |
637 | const struct of_device_id *match; |
638 | struct regmap_config *regmap_config; |
639 | struct fwnode_handle *fwnode; |
640 | int ret; |
641 | |
642 | chip = devm_kzalloc(dev: &client->dev, size: sizeof(struct stusb160x), GFP_KERNEL); |
643 | if (!chip) |
644 | return -ENOMEM; |
645 | |
646 | i2c_set_clientdata(client, data: chip); |
647 | |
648 | match = i2c_of_match_device(matches: stusb160x_of_match, client); |
649 | regmap_config = (struct regmap_config *)match->data; |
650 | chip->regmap = devm_regmap_init_i2c(client, regmap_config); |
651 | if (IS_ERR(ptr: chip->regmap)) { |
652 | ret = PTR_ERR(ptr: chip->regmap); |
653 | dev_err(&client->dev, |
654 | "Failed to allocate register map:%d\n" , ret); |
655 | return ret; |
656 | } |
657 | |
658 | chip->dev = &client->dev; |
659 | |
660 | chip->vsys_supply = devm_regulator_get_optional(dev: chip->dev, id: "vsys" ); |
661 | if (IS_ERR(ptr: chip->vsys_supply)) { |
662 | ret = PTR_ERR(ptr: chip->vsys_supply); |
663 | if (ret != -ENODEV) |
664 | return ret; |
665 | chip->vsys_supply = NULL; |
666 | } |
667 | |
668 | chip->vdd_supply = devm_regulator_get_optional(dev: chip->dev, id: "vdd" ); |
669 | if (IS_ERR(ptr: chip->vdd_supply)) { |
670 | ret = PTR_ERR(ptr: chip->vdd_supply); |
671 | if (ret != -ENODEV) |
672 | return ret; |
673 | chip->vdd_supply = NULL; |
674 | } |
675 | |
676 | chip->vconn_supply = devm_regulator_get_optional(dev: chip->dev, id: "vconn" ); |
677 | if (IS_ERR(ptr: chip->vconn_supply)) { |
678 | ret = PTR_ERR(ptr: chip->vconn_supply); |
679 | if (ret != -ENODEV) |
680 | return ret; |
681 | chip->vconn_supply = NULL; |
682 | } |
683 | |
684 | fwnode = device_get_named_child_node(dev: chip->dev, childname: "connector" ); |
685 | if (!fwnode) |
686 | return -ENODEV; |
687 | |
688 | /* |
689 | * This fwnode has a "compatible" property, but is never populated as a |
690 | * struct device. Instead we simply parse it to read the properties. |
691 | * This it breaks fw_devlink=on. To maintain backward compatibility |
692 | * with existing DT files, we work around this by deleting any |
693 | * fwnode_links to/from this fwnode. |
694 | */ |
695 | fw_devlink_purge_absent_suppliers(fwnode); |
696 | |
697 | /* |
698 | * When both VDD and VSYS power supplies are present, the low power |
699 | * supply VSYS is selected when VSYS voltage is above 3.1 V. |
700 | * Otherwise VDD is selected. |
701 | */ |
702 | if (chip->vdd_supply && |
703 | (!chip->vsys_supply || |
704 | (regulator_get_voltage(regulator: chip->vsys_supply) <= 3100000))) |
705 | chip->main_supply = chip->vdd_supply; |
706 | else |
707 | chip->main_supply = chip->vsys_supply; |
708 | |
709 | if (chip->main_supply) { |
710 | ret = regulator_enable(regulator: chip->main_supply); |
711 | if (ret) { |
712 | dev_err(chip->dev, |
713 | "Failed to enable main supply: %d\n" , ret); |
714 | goto fwnode_put; |
715 | } |
716 | } |
717 | |
718 | /* Get configuration from chip */ |
719 | ret = stusb160x_get_caps(chip); |
720 | if (ret) { |
721 | dev_err(chip->dev, "Failed to get port caps: %d\n" , ret); |
722 | goto main_reg_disable; |
723 | } |
724 | |
725 | /* Get optional re-configuration from device tree */ |
726 | ret = stusb160x_get_fw_caps(chip, fwnode); |
727 | if (ret) { |
728 | dev_err(chip->dev, "Failed to get connector caps: %d\n" , ret); |
729 | goto main_reg_disable; |
730 | } |
731 | |
732 | ret = stusb160x_chip_init(chip); |
733 | if (ret) { |
734 | dev_err(chip->dev, "Failed to init port: %d\n" , ret); |
735 | goto main_reg_disable; |
736 | } |
737 | |
738 | chip->port = typec_register_port(parent: chip->dev, cap: &chip->capability); |
739 | if (IS_ERR(ptr: chip->port)) { |
740 | ret = PTR_ERR(ptr: chip->port); |
741 | goto all_reg_disable; |
742 | } |
743 | |
744 | /* |
745 | * Default power operation mode initialization: will be updated upon |
746 | * attach/detach interrupt |
747 | */ |
748 | typec_set_pwr_opmode(port: chip->port, mode: chip->pwr_opmode); |
749 | |
750 | if (client->irq) { |
751 | chip->role_sw = fwnode_usb_role_switch_get(node: fwnode); |
752 | if (IS_ERR(ptr: chip->role_sw)) { |
753 | ret = dev_err_probe(dev: chip->dev, err: PTR_ERR(ptr: chip->role_sw), |
754 | fmt: "Failed to get usb role switch\n" ); |
755 | goto port_unregister; |
756 | } |
757 | |
758 | ret = stusb160x_irq_init(chip, irq: client->irq); |
759 | if (ret) |
760 | goto role_sw_put; |
761 | } else { |
762 | /* |
763 | * If Source or Dual power role, need to enable VDD supply |
764 | * providing Vbus if present. In case of interrupt support, |
765 | * VDD supply will be dynamically managed upon attach/detach |
766 | * interrupt. |
767 | */ |
768 | if (chip->port_type != TYPEC_PORT_SNK && chip->vdd_supply) { |
769 | ret = regulator_enable(regulator: chip->vdd_supply); |
770 | if (ret) { |
771 | dev_err(chip->dev, |
772 | "Failed to enable VDD supply: %d\n" , |
773 | ret); |
774 | goto port_unregister; |
775 | } |
776 | chip->vbus_on = true; |
777 | } |
778 | } |
779 | |
780 | fwnode_handle_put(fwnode); |
781 | |
782 | return 0; |
783 | |
784 | role_sw_put: |
785 | if (chip->role_sw) |
786 | usb_role_switch_put(sw: chip->role_sw); |
787 | port_unregister: |
788 | typec_unregister_port(port: chip->port); |
789 | all_reg_disable: |
790 | if (stusb160x_get_vconn(chip)) |
791 | stusb160x_set_vconn(chip, on: false); |
792 | main_reg_disable: |
793 | if (chip->main_supply) |
794 | regulator_disable(regulator: chip->main_supply); |
795 | fwnode_put: |
796 | fwnode_handle_put(fwnode); |
797 | |
798 | return ret; |
799 | } |
800 | |
801 | static void stusb160x_remove(struct i2c_client *client) |
802 | { |
803 | struct stusb160x *chip = i2c_get_clientdata(client); |
804 | |
805 | if (chip->partner) { |
806 | typec_unregister_partner(partner: chip->partner); |
807 | chip->partner = NULL; |
808 | } |
809 | |
810 | if (chip->vbus_on) |
811 | regulator_disable(regulator: chip->vdd_supply); |
812 | |
813 | if (chip->role_sw) |
814 | usb_role_switch_put(sw: chip->role_sw); |
815 | |
816 | typec_unregister_port(port: chip->port); |
817 | |
818 | if (stusb160x_get_vconn(chip)) |
819 | stusb160x_set_vconn(chip, on: false); |
820 | |
821 | if (chip->main_supply) |
822 | regulator_disable(regulator: chip->main_supply); |
823 | } |
824 | |
825 | static int __maybe_unused stusb160x_suspend(struct device *dev) |
826 | { |
827 | struct stusb160x *chip = dev_get_drvdata(dev); |
828 | |
829 | /* Mask interrupts */ |
830 | return regmap_update_bits(map: chip->regmap, |
831 | STUSB160X_ALERT_STATUS_MASK_CTRL, |
832 | STUSB160X_ALL_ALERTS, STUSB160X_ALL_ALERTS); |
833 | } |
834 | |
835 | static int __maybe_unused stusb160x_resume(struct device *dev) |
836 | { |
837 | struct stusb160x *chip = dev_get_drvdata(dev); |
838 | u32 status; |
839 | int ret; |
840 | |
841 | ret = regcache_sync(map: chip->regmap); |
842 | if (ret) |
843 | return ret; |
844 | |
845 | /* Check if attach/detach occurred during low power */ |
846 | ret = regmap_read(map: chip->regmap, |
847 | STUSB160X_CC_CONNECTION_STATUS, val: &status); |
848 | if (ret) |
849 | return ret; |
850 | |
851 | if (chip->partner && !(status & STUSB160X_CC_ATTACH)) |
852 | stusb160x_detach(chip, status); |
853 | |
854 | if (!chip->partner && (status & STUSB160X_CC_ATTACH)) { |
855 | ret = stusb160x_attach(chip, status); |
856 | if (ret) |
857 | dev_err(chip->dev, "attach failed: %d\n" , ret); |
858 | } |
859 | |
860 | /* Unmask interrupts */ |
861 | return regmap_write_bits(map: chip->regmap, STUSB160X_ALERT_STATUS_MASK_CTRL, |
862 | STUSB160X_CC_CONNECTION, val: 0); |
863 | } |
864 | |
865 | static SIMPLE_DEV_PM_OPS(stusb160x_pm_ops, stusb160x_suspend, stusb160x_resume); |
866 | |
867 | static struct i2c_driver stusb160x_driver = { |
868 | .driver = { |
869 | .name = "stusb160x" , |
870 | .pm = &stusb160x_pm_ops, |
871 | .of_match_table = stusb160x_of_match, |
872 | }, |
873 | .probe = stusb160x_probe, |
874 | .remove = stusb160x_remove, |
875 | }; |
876 | module_i2c_driver(stusb160x_driver); |
877 | |
878 | MODULE_AUTHOR("Amelie Delaunay <amelie.delaunay@st.com>" ); |
879 | MODULE_DESCRIPTION("STMicroelectronics STUSB160x Type-C controller driver" ); |
880 | MODULE_LICENSE("GPL v2" ); |
881 | |