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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * extcon-sm5502.c - Silicon Mitus SM5502 extcon drvier to support USB switches
4 *
5 * Copyright (c) 2014 Samsung Electronics Co., Ltd
6 * Author: Chanwoo Choi <cw00.choi@samsung.com>
7 */
8
9#include <linux/err.h>
10#include <linux/i2c.h>
11#include <linux/interrupt.h>
12#include <linux/irqdomain.h>
13#include <linux/kernel.h>
14#include <linux/module.h>
15#include <linux/platform_device.h>
16#include <linux/regmap.h>
17#include <linux/slab.h>
18#include <linux/extcon-provider.h>
19
20#include "extcon-sm5502.h"
21
22#define DELAY_MS_DEFAULT 17000 /* unit: millisecond */
23
24struct muic_irq {
25 unsigned int irq;
26 const char *name;
27 unsigned int virq;
28};
29
30struct reg_data {
31 u8 reg;
32 unsigned int val;
33 bool invert;
34};
35
36struct sm5502_muic_info {
37 struct device *dev;
38 struct extcon_dev *edev;
39
40 struct i2c_client *i2c;
41 struct regmap *regmap;
42
43 const struct sm5502_type *type;
44 struct regmap_irq_chip_data *irq_data;
45 int irq;
46 bool irq_attach;
47 bool irq_detach;
48 struct work_struct irq_work;
49
50 struct mutex mutex;
51
52 /*
53 * Use delayed workqueue to detect cable state and then
54 * notify cable state to notifiee/platform through uevent.
55 * After completing the booting of platform, the extcon provider
56 * driver should notify cable state to upper layer.
57 */
58 struct delayed_work wq_detcable;
59};
60
61struct sm5502_type {
62 struct muic_irq *muic_irqs;
63 unsigned int num_muic_irqs;
64 const struct regmap_irq_chip *irq_chip;
65
66 struct reg_data *reg_data;
67 unsigned int num_reg_data;
68
69 unsigned int otg_dev_type1;
70 int (*parse_irq)(struct sm5502_muic_info *info, int irq_type);
71};
72
73/* Default value of SM5502 register to bring up MUIC device. */
74static struct reg_data sm5502_reg_data[] = {
75 {
76 .reg = SM5502_REG_RESET,
77 .val = SM5502_REG_RESET_MASK,
78 .invert = true,
79 }, {
80 .reg = SM5502_REG_CONTROL,
81 .val = SM5502_REG_CONTROL_MASK_INT_MASK,
82 .invert = false,
83 }, {
84 .reg = SM5502_REG_INTMASK1,
85 .val = SM5502_REG_INTM1_KP_MASK
86 | SM5502_REG_INTM1_LKP_MASK
87 | SM5502_REG_INTM1_LKR_MASK,
88 .invert = true,
89 }, {
90 .reg = SM5502_REG_INTMASK2,
91 .val = SM5502_REG_INTM2_VBUS_DET_MASK
92 | SM5502_REG_INTM2_REV_ACCE_MASK
93 | SM5502_REG_INTM2_ADC_CHG_MASK
94 | SM5502_REG_INTM2_STUCK_KEY_MASK
95 | SM5502_REG_INTM2_STUCK_KEY_RCV_MASK
96 | SM5502_REG_INTM2_MHL_MASK,
97 .invert = true,
98 },
99};
100
101/* Default value of SM5504 register to bring up MUIC device. */
102static struct reg_data sm5504_reg_data[] = {
103 {
104 .reg = SM5502_REG_RESET,
105 .val = SM5502_REG_RESET_MASK,
106 .invert = true,
107 }, {
108 .reg = SM5502_REG_INTMASK1,
109 .val = SM5504_REG_INTM1_ATTACH_MASK
110 | SM5504_REG_INTM1_DETACH_MASK,
111 .invert = false,
112 }, {
113 .reg = SM5502_REG_INTMASK2,
114 .val = SM5504_REG_INTM2_RID_CHG_MASK
115 | SM5504_REG_INTM2_UVLO_MASK
116 | SM5504_REG_INTM2_POR_MASK,
117 .invert = true,
118 }, {
119 .reg = SM5502_REG_CONTROL,
120 .val = SM5502_REG_CONTROL_MANUAL_SW_MASK
121 | SM5504_REG_CONTROL_CHGTYP_MASK
122 | SM5504_REG_CONTROL_USBCHDEN_MASK
123 | SM5504_REG_CONTROL_ADC_EN_MASK,
124 .invert = true,
125 },
126};
127
128/* List of detectable cables */
129static const unsigned int sm5502_extcon_cable[] = {
130 EXTCON_USB,
131 EXTCON_USB_HOST,
132 EXTCON_CHG_USB_SDP,
133 EXTCON_CHG_USB_DCP,
134 EXTCON_NONE,
135};
136
137/* Define supported accessory type */
138enum sm5502_muic_acc_type {
139 SM5502_MUIC_ADC_GROUND = 0x0,
140 SM5502_MUIC_ADC_SEND_END_BUTTON,
141 SM5502_MUIC_ADC_REMOTE_S1_BUTTON,
142 SM5502_MUIC_ADC_REMOTE_S2_BUTTON,
143 SM5502_MUIC_ADC_REMOTE_S3_BUTTON,
144 SM5502_MUIC_ADC_REMOTE_S4_BUTTON,
145 SM5502_MUIC_ADC_REMOTE_S5_BUTTON,
146 SM5502_MUIC_ADC_REMOTE_S6_BUTTON,
147 SM5502_MUIC_ADC_REMOTE_S7_BUTTON,
148 SM5502_MUIC_ADC_REMOTE_S8_BUTTON,
149 SM5502_MUIC_ADC_REMOTE_S9_BUTTON,
150 SM5502_MUIC_ADC_REMOTE_S10_BUTTON,
151 SM5502_MUIC_ADC_REMOTE_S11_BUTTON,
152 SM5502_MUIC_ADC_REMOTE_S12_BUTTON,
153 SM5502_MUIC_ADC_RESERVED_ACC_1,
154 SM5502_MUIC_ADC_RESERVED_ACC_2,
155 SM5502_MUIC_ADC_RESERVED_ACC_3,
156 SM5502_MUIC_ADC_RESERVED_ACC_4,
157 SM5502_MUIC_ADC_RESERVED_ACC_5,
158 SM5502_MUIC_ADC_AUDIO_TYPE2,
159 SM5502_MUIC_ADC_PHONE_POWERED_DEV,
160 SM5502_MUIC_ADC_TTY_CONVERTER,
161 SM5502_MUIC_ADC_UART_CABLE,
162 SM5502_MUIC_ADC_TYPE1_CHARGER,
163 SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB,
164 SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB,
165 SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE,
166 SM5502_MUIC_ADC_TYPE2_CHARGER,
167 SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART,
168 SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART,
169 SM5502_MUIC_ADC_AUDIO_TYPE1,
170 SM5502_MUIC_ADC_OPEN = 0x1f,
171
172 /*
173 * The below accessories have same ADC value (0x1f or 0x1e).
174 * So, Device type1 is used to separate specific accessory.
175 */
176 /* |---------|--ADC| */
177 /* | [7:5]|[4:0]| */
178 SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE = 0x3e, /* | 001|11110| */
179 SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END = 0x5e, /* | 010|11110| */
180 /* |Dev Type1|--ADC| */
181 SM5502_MUIC_ADC_GROUND_USB_OTG = 0x80, /* | 100|00000| */
182 SM5502_MUIC_ADC_OPEN_USB = 0x5f, /* | 010|11111| */
183 SM5502_MUIC_ADC_OPEN_TA = 0xdf, /* | 110|11111| */
184 SM5502_MUIC_ADC_OPEN_USB_OTG = 0xff, /* | 111|11111| */
185};
186
187/* List of supported interrupt for SM5502 */
188static struct muic_irq sm5502_muic_irqs[] = {
189 { SM5502_IRQ_INT1_ATTACH, "muic-attach" },
190 { SM5502_IRQ_INT1_DETACH, "muic-detach" },
191 { SM5502_IRQ_INT1_KP, "muic-kp" },
192 { SM5502_IRQ_INT1_LKP, "muic-lkp" },
193 { SM5502_IRQ_INT1_LKR, "muic-lkr" },
194 { SM5502_IRQ_INT1_OVP_EVENT, "muic-ovp-event" },
195 { SM5502_IRQ_INT1_OCP_EVENT, "muic-ocp-event" },
196 { SM5502_IRQ_INT1_OVP_OCP_DIS, "muic-ovp-ocp-dis" },
197 { SM5502_IRQ_INT2_VBUS_DET, "muic-vbus-det" },
198 { SM5502_IRQ_INT2_REV_ACCE, "muic-rev-acce" },
199 { SM5502_IRQ_INT2_ADC_CHG, "muic-adc-chg" },
200 { SM5502_IRQ_INT2_STUCK_KEY, "muic-stuck-key" },
201 { SM5502_IRQ_INT2_STUCK_KEY_RCV, "muic-stuck-key-rcv" },
202 { SM5502_IRQ_INT2_MHL, "muic-mhl" },
203};
204
205/* Define interrupt list of SM5502 to register regmap_irq */
206static const struct regmap_irq sm5502_irqs[] = {
207 /* INT1 interrupts */
208 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_ATTACH_MASK, },
209 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_DETACH_MASK, },
210 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_KP_MASK, },
211 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKP_MASK, },
212 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKR_MASK, },
213 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_EVENT_MASK, },
214 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OCP_EVENT_MASK, },
215 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_OCP_DIS_MASK, },
216
217 /* INT2 interrupts */
218 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_VBUS_DET_MASK,},
219 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_REV_ACCE_MASK, },
220 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_ADC_CHG_MASK, },
221 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_MASK, },
222 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_RCV_MASK, },
223 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_MHL_MASK, },
224};
225
226static const struct regmap_irq_chip sm5502_muic_irq_chip = {
227 .name = "sm5502",
228 .status_base = SM5502_REG_INT1,
229 .mask_base = SM5502_REG_INTMASK1,
230 .num_regs = 2,
231 .irqs = sm5502_irqs,
232 .num_irqs = ARRAY_SIZE(sm5502_irqs),
233};
234
235/* List of supported interrupt for SM5504 */
236static struct muic_irq sm5504_muic_irqs[] = {
237 { SM5504_IRQ_INT1_ATTACH, "muic-attach" },
238 { SM5504_IRQ_INT1_DETACH, "muic-detach" },
239 { SM5504_IRQ_INT1_CHG_DET, "muic-chg-det" },
240 { SM5504_IRQ_INT1_DCD_OUT, "muic-dcd-out" },
241 { SM5504_IRQ_INT1_OVP_EVENT, "muic-ovp-event" },
242 { SM5504_IRQ_INT1_CONNECT, "muic-connect" },
243 { SM5504_IRQ_INT1_ADC_CHG, "muic-adc-chg" },
244 { SM5504_IRQ_INT2_RID_CHG, "muic-rid-chg" },
245 { SM5504_IRQ_INT2_UVLO, "muic-uvlo" },
246 { SM5504_IRQ_INT2_POR, "muic-por" },
247 { SM5504_IRQ_INT2_OVP_FET, "muic-ovp-fet" },
248 { SM5504_IRQ_INT2_OCP_LATCH, "muic-ocp-latch" },
249 { SM5504_IRQ_INT2_OCP_EVENT, "muic-ocp-event" },
250 { SM5504_IRQ_INT2_OVP_OCP_EVENT, "muic-ovp-ocp-event" },
251};
252
253/* Define interrupt list of SM5504 to register regmap_irq */
254static const struct regmap_irq sm5504_irqs[] = {
255 /* INT1 interrupts */
256 { .reg_offset = 0, .mask = SM5504_IRQ_INT1_ATTACH_MASK, },
257 { .reg_offset = 0, .mask = SM5504_IRQ_INT1_DETACH_MASK, },
258 { .reg_offset = 0, .mask = SM5504_IRQ_INT1_CHG_DET_MASK, },
259 { .reg_offset = 0, .mask = SM5504_IRQ_INT1_DCD_OUT_MASK, },
260 { .reg_offset = 0, .mask = SM5504_IRQ_INT1_OVP_MASK, },
261 { .reg_offset = 0, .mask = SM5504_IRQ_INT1_CONNECT_MASK, },
262 { .reg_offset = 0, .mask = SM5504_IRQ_INT1_ADC_CHG_MASK, },
263
264 /* INT2 interrupts */
265 { .reg_offset = 1, .mask = SM5504_IRQ_INT2_RID_CHG_MASK,},
266 { .reg_offset = 1, .mask = SM5504_IRQ_INT2_UVLO_MASK, },
267 { .reg_offset = 1, .mask = SM5504_IRQ_INT2_POR_MASK, },
268 { .reg_offset = 1, .mask = SM5504_IRQ_INT2_OVP_FET_MASK, },
269 { .reg_offset = 1, .mask = SM5504_IRQ_INT2_OCP_LATCH_MASK, },
270 { .reg_offset = 1, .mask = SM5504_IRQ_INT2_OCP_EVENT_MASK, },
271 { .reg_offset = 1, .mask = SM5504_IRQ_INT2_OVP_OCP_EVENT_MASK, },
272};
273
274static const struct regmap_irq_chip sm5504_muic_irq_chip = {
275 .name = "sm5504",
276 .status_base = SM5502_REG_INT1,
277 .mask_base = SM5502_REG_INTMASK1,
278 .num_regs = 2,
279 .irqs = sm5504_irqs,
280 .num_irqs = ARRAY_SIZE(sm5504_irqs),
281};
282
283/* Define regmap configuration of SM5502 for I2C communication */
284static bool sm5502_muic_volatile_reg(struct device *dev, unsigned int reg)
285{
286 switch (reg) {
287 case SM5502_REG_INTMASK1:
288 case SM5502_REG_INTMASK2:
289 return true;
290 default:
291 break;
292 }
293 return false;
294}
295
296static const struct regmap_config sm5502_muic_regmap_config = {
297 .reg_bits = 8,
298 .val_bits = 8,
299 .volatile_reg = sm5502_muic_volatile_reg,
300 .max_register = SM5502_REG_END,
301};
302
303/* Change DM_CON/DP_CON/VBUSIN switch according to cable type */
304static int sm5502_muic_set_path(struct sm5502_muic_info *info,
305 unsigned int con_sw, unsigned int vbus_sw,
306 bool attached)
307{
308 int ret;
309
310 if (!attached) {
311 con_sw = DM_DP_SWITCH_OPEN;
312 vbus_sw = VBUSIN_SWITCH_OPEN;
313 }
314
315 switch (con_sw) {
316 case DM_DP_SWITCH_OPEN:
317 case DM_DP_SWITCH_USB:
318 case DM_DP_SWITCH_AUDIO:
319 case DM_DP_SWITCH_UART:
320 ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1,
321 SM5502_REG_MANUAL_SW1_DP_MASK |
322 SM5502_REG_MANUAL_SW1_DM_MASK,
323 con_sw);
324 if (ret < 0) {
325 dev_err(info->dev,
326 "cannot update DM_CON/DP_CON switch\n");
327 return ret;
328 }
329 break;
330 default:
331 dev_err(info->dev, "Unknown DM_CON/DP_CON switch type (%d)\n",
332 con_sw);
333 return -EINVAL;
334 }
335
336 switch (vbus_sw) {
337 case VBUSIN_SWITCH_OPEN:
338 case VBUSIN_SWITCH_VBUSOUT:
339 case VBUSIN_SWITCH_MIC:
340 case VBUSIN_SWITCH_VBUSOUT_WITH_USB:
341 ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1,
342 SM5502_REG_MANUAL_SW1_VBUSIN_MASK,
343 vbus_sw);
344 if (ret < 0) {
345 dev_err(info->dev,
346 "cannot update VBUSIN switch\n");
347 return ret;
348 }
349 break;
350 default:
351 dev_err(info->dev, "Unknown VBUS switch type (%d)\n", vbus_sw);
352 return -EINVAL;
353 }
354
355 return 0;
356}
357
358/* Return cable type of attached or detached accessories */
359static unsigned int sm5502_muic_get_cable_type(struct sm5502_muic_info *info)
360{
361 unsigned int cable_type, adc, dev_type1;
362 int ret;
363
364 /* Read ADC value according to external cable or button */
365 ret = regmap_read(info->regmap, SM5502_REG_ADC, &adc);
366 if (ret) {
367 dev_err(info->dev, "failed to read ADC register\n");
368 return ret;
369 }
370
371 /*
372 * If ADC is SM5502_MUIC_ADC_GROUND(0x0), external cable hasn't
373 * connected with to MUIC device.
374 */
375 cable_type = adc & SM5502_REG_ADC_MASK;
376
377 switch (cable_type) {
378 case SM5502_MUIC_ADC_GROUND:
379 ret = regmap_read(info->regmap, SM5502_REG_DEV_TYPE1,
380 &dev_type1);
381 if (ret) {
382 dev_err(info->dev, "failed to read DEV_TYPE1 reg\n");
383 return ret;
384 }
385
386 if (dev_type1 == info->type->otg_dev_type1) {
387 cable_type = SM5502_MUIC_ADC_GROUND_USB_OTG;
388 } else {
389 dev_dbg(info->dev,
390 "cannot identify the cable type: adc(0x%x), dev_type1(0x%x)\n",
391 adc, dev_type1);
392 return -EINVAL;
393 }
394 break;
395 case SM5502_MUIC_ADC_SEND_END_BUTTON:
396 case SM5502_MUIC_ADC_REMOTE_S1_BUTTON:
397 case SM5502_MUIC_ADC_REMOTE_S2_BUTTON:
398 case SM5502_MUIC_ADC_REMOTE_S3_BUTTON:
399 case SM5502_MUIC_ADC_REMOTE_S4_BUTTON:
400 case SM5502_MUIC_ADC_REMOTE_S5_BUTTON:
401 case SM5502_MUIC_ADC_REMOTE_S6_BUTTON:
402 case SM5502_MUIC_ADC_REMOTE_S7_BUTTON:
403 case SM5502_MUIC_ADC_REMOTE_S8_BUTTON:
404 case SM5502_MUIC_ADC_REMOTE_S9_BUTTON:
405 case SM5502_MUIC_ADC_REMOTE_S10_BUTTON:
406 case SM5502_MUIC_ADC_REMOTE_S11_BUTTON:
407 case SM5502_MUIC_ADC_REMOTE_S12_BUTTON:
408 case SM5502_MUIC_ADC_RESERVED_ACC_1:
409 case SM5502_MUIC_ADC_RESERVED_ACC_2:
410 case SM5502_MUIC_ADC_RESERVED_ACC_3:
411 case SM5502_MUIC_ADC_RESERVED_ACC_4:
412 case SM5502_MUIC_ADC_RESERVED_ACC_5:
413 case SM5502_MUIC_ADC_AUDIO_TYPE2:
414 case SM5502_MUIC_ADC_PHONE_POWERED_DEV:
415 case SM5502_MUIC_ADC_TTY_CONVERTER:
416 case SM5502_MUIC_ADC_UART_CABLE:
417 case SM5502_MUIC_ADC_TYPE1_CHARGER:
418 case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB:
419 case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB:
420 case SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE:
421 case SM5502_MUIC_ADC_TYPE2_CHARGER:
422 case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART:
423 case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART:
424 break;
425 case SM5502_MUIC_ADC_AUDIO_TYPE1:
426 /*
427 * Check whether cable type is
428 * SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE
429 * or SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END
430 * by using Button event.
431 */
432 break;
433 case SM5502_MUIC_ADC_OPEN:
434 ret = regmap_read(info->regmap, SM5502_REG_DEV_TYPE1,
435 &dev_type1);
436 if (ret) {
437 dev_err(info->dev, "failed to read DEV_TYPE1 reg\n");
438 return ret;
439 }
440
441 if (dev_type1 == info->type->otg_dev_type1) {
442 cable_type = SM5502_MUIC_ADC_OPEN_USB_OTG;
443 break;
444 }
445
446 switch (dev_type1) {
447 case SM5502_REG_DEV_TYPE1_USB_SDP_MASK:
448 cable_type = SM5502_MUIC_ADC_OPEN_USB;
449 break;
450 case SM5502_REG_DEV_TYPE1_DEDICATED_CHG_MASK:
451 cable_type = SM5502_MUIC_ADC_OPEN_TA;
452 break;
453 default:
454 dev_dbg(info->dev,
455 "cannot identify the cable type: adc(0x%x)\n",
456 adc);
457 return -EINVAL;
458 }
459 break;
460 default:
461 dev_err(info->dev,
462 "failed to identify the cable type: adc(0x%x)\n", adc);
463 return -EINVAL;
464 }
465
466 return cable_type;
467}
468
469static int sm5502_muic_cable_handler(struct sm5502_muic_info *info,
470 bool attached)
471{
472 static unsigned int prev_cable_type = SM5502_MUIC_ADC_GROUND;
473 unsigned int cable_type = SM5502_MUIC_ADC_GROUND;
474 unsigned int con_sw = DM_DP_SWITCH_OPEN;
475 unsigned int vbus_sw = VBUSIN_SWITCH_OPEN;
476 unsigned int id;
477 int ret;
478
479 /* Get the type of attached or detached cable */
480 if (attached)
481 cable_type = sm5502_muic_get_cable_type(info);
482 else
483 cable_type = prev_cable_type;
484 prev_cable_type = cable_type;
485
486 switch (cable_type) {
487 case SM5502_MUIC_ADC_OPEN_USB:
488 id = EXTCON_USB;
489 con_sw = DM_DP_SWITCH_USB;
490 vbus_sw = VBUSIN_SWITCH_VBUSOUT_WITH_USB;
491 break;
492 case SM5502_MUIC_ADC_OPEN_TA:
493 id = EXTCON_CHG_USB_DCP;
494 con_sw = DM_DP_SWITCH_OPEN;
495 vbus_sw = VBUSIN_SWITCH_VBUSOUT;
496 break;
497 case SM5502_MUIC_ADC_GROUND_USB_OTG:
498 case SM5502_MUIC_ADC_OPEN_USB_OTG:
499 id = EXTCON_USB_HOST;
500 con_sw = DM_DP_SWITCH_USB;
501 vbus_sw = VBUSIN_SWITCH_OPEN;
502 break;
503 default:
504 dev_dbg(info->dev,
505 "cannot handle this cable_type (0x%x)\n", cable_type);
506 return 0;
507 }
508
509 /* Change internal hardware path(DM_CON/DP_CON, VBUSIN) */
510 ret = sm5502_muic_set_path(info, con_sw, vbus_sw, attached);
511 if (ret < 0)
512 return ret;
513
514 /* Change the state of external accessory */
515 extcon_set_state_sync(info->edev, id, attached);
516 if (id == EXTCON_USB)
517 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
518 attached);
519
520 return 0;
521}
522
523static void sm5502_muic_irq_work(struct work_struct *work)
524{
525 struct sm5502_muic_info *info = container_of(work,
526 struct sm5502_muic_info, irq_work);
527 int ret = 0;
528
529 if (!info->edev)
530 return;
531
532 mutex_lock(&info->mutex);
533
534 /* Detect attached or detached cables */
535 if (info->irq_attach) {
536 ret = sm5502_muic_cable_handler(info, true);
537 info->irq_attach = false;
538 }
539 if (info->irq_detach) {
540 ret = sm5502_muic_cable_handler(info, false);
541 info->irq_detach = false;
542 }
543
544 if (ret < 0)
545 dev_err(info->dev, "failed to handle MUIC interrupt\n");
546
547 mutex_unlock(&info->mutex);
548}
549
550/*
551 * Sets irq_attach or irq_detach in sm5502_muic_info and returns 0.
552 * Returns -ESRCH if irq_type does not match registered IRQ for this dev type.
553 */
554static int sm5502_parse_irq(struct sm5502_muic_info *info, int irq_type)
555{
556 switch (irq_type) {
557 case SM5502_IRQ_INT1_ATTACH:
558 info->irq_attach = true;
559 break;
560 case SM5502_IRQ_INT1_DETACH:
561 info->irq_detach = true;
562 break;
563 case SM5502_IRQ_INT1_KP:
564 case SM5502_IRQ_INT1_LKP:
565 case SM5502_IRQ_INT1_LKR:
566 case SM5502_IRQ_INT1_OVP_EVENT:
567 case SM5502_IRQ_INT1_OCP_EVENT:
568 case SM5502_IRQ_INT1_OVP_OCP_DIS:
569 case SM5502_IRQ_INT2_VBUS_DET:
570 case SM5502_IRQ_INT2_REV_ACCE:
571 case SM5502_IRQ_INT2_ADC_CHG:
572 case SM5502_IRQ_INT2_STUCK_KEY:
573 case SM5502_IRQ_INT2_STUCK_KEY_RCV:
574 case SM5502_IRQ_INT2_MHL:
575 default:
576 break;
577 }
578
579 return 0;
580}
581
582static int sm5504_parse_irq(struct sm5502_muic_info *info, int irq_type)
583{
584 switch (irq_type) {
585 case SM5504_IRQ_INT1_ATTACH:
586 info->irq_attach = true;
587 break;
588 case SM5504_IRQ_INT1_DETACH:
589 info->irq_detach = true;
590 break;
591 case SM5504_IRQ_INT1_CHG_DET:
592 case SM5504_IRQ_INT1_DCD_OUT:
593 case SM5504_IRQ_INT1_OVP_EVENT:
594 case SM5504_IRQ_INT1_CONNECT:
595 case SM5504_IRQ_INT1_ADC_CHG:
596 case SM5504_IRQ_INT2_RID_CHG:
597 case SM5504_IRQ_INT2_UVLO:
598 case SM5504_IRQ_INT2_POR:
599 case SM5504_IRQ_INT2_OVP_FET:
600 case SM5504_IRQ_INT2_OCP_LATCH:
601 case SM5504_IRQ_INT2_OCP_EVENT:
602 case SM5504_IRQ_INT2_OVP_OCP_EVENT:
603 default:
604 break;
605 }
606
607 return 0;
608}
609
610static irqreturn_t sm5502_muic_irq_handler(int irq, void *data)
611{
612 struct sm5502_muic_info *info = data;
613 int i, irq_type = -1, ret;
614
615 for (i = 0; i < info->type->num_muic_irqs; i++)
616 if (irq == info->type->muic_irqs[i].virq)
617 irq_type = info->type->muic_irqs[i].irq;
618
619 ret = info->type->parse_irq(info, irq_type);
620 if (ret < 0) {
621 dev_warn(info->dev, "cannot handle is interrupt:%d\n",
622 irq_type);
623 return IRQ_HANDLED;
624 }
625 schedule_work(&info->irq_work);
626
627 return IRQ_HANDLED;
628}
629
630static void sm5502_muic_detect_cable_wq(struct work_struct *work)
631{
632 struct sm5502_muic_info *info = container_of(to_delayed_work(work),
633 struct sm5502_muic_info, wq_detcable);
634 int ret;
635
636 /* Notify the state of connector cable or not */
637 ret = sm5502_muic_cable_handler(info, true);
638 if (ret < 0)
639 dev_warn(info->dev, "failed to detect cable state\n");
640}
641
642static void sm5502_init_dev_type(struct sm5502_muic_info *info)
643{
644 unsigned int reg_data, vendor_id, version_id;
645 int i, ret;
646
647 /* To test I2C, Print version_id and vendor_id of SM5502 */
648 ret = regmap_read(info->regmap, SM5502_REG_DEVICE_ID, ®_data);
649 if (ret) {
650 dev_err(info->dev,
651 "failed to read DEVICE_ID register: %d\n", ret);
652 return;
653 }
654
655 vendor_id = ((reg_data & SM5502_REG_DEVICE_ID_VENDOR_MASK) >>
656 SM5502_REG_DEVICE_ID_VENDOR_SHIFT);
657 version_id = ((reg_data & SM5502_REG_DEVICE_ID_VERSION_MASK) >>
658 SM5502_REG_DEVICE_ID_VERSION_SHIFT);
659
660 dev_info(info->dev, "Device type: version: 0x%x, vendor: 0x%x\n",
661 version_id, vendor_id);
662
663 /* Initiazle the register of SM5502 device to bring-up */
664 for (i = 0; i < info->type->num_reg_data; i++) {
665 unsigned int val = 0;
666
667 if (!info->type->reg_data[i].invert)
668 val |= ~info->type->reg_data[i].val;
669 else
670 val = info->type->reg_data[i].val;
671 regmap_write(info->regmap, info->type->reg_data[i].reg, val);
672 }
673}
674
675static int sm5022_muic_i2c_probe(struct i2c_client *i2c)
676{
677 struct device_node *np = i2c->dev.of_node;
678 struct sm5502_muic_info *info;
679 int i, ret, irq_flags;
680
681 if (!np)
682 return -EINVAL;
683
684 info = devm_kzalloc(&i2c->dev, sizeof(*info), GFP_KERNEL);
685 if (!info)
686 return -ENOMEM;
687 i2c_set_clientdata(i2c, info);
688
689 info->dev = &i2c->dev;
690 info->i2c = i2c;
691 info->irq = i2c->irq;
692 info->type = device_get_match_data(info->dev);
693 if (!info->type)
694 return -EINVAL;
695 if (!info->type->parse_irq) {
696 dev_err(info->dev, "parse_irq missing in struct sm5502_type\n");
697 return -EINVAL;
698 }
699
700 mutex_init(&info->mutex);
701
702 INIT_WORK(&info->irq_work, sm5502_muic_irq_work);
703
704 info->regmap = devm_regmap_init_i2c(i2c, &sm5502_muic_regmap_config);
705 if (IS_ERR(info->regmap)) {
706 ret = PTR_ERR(info->regmap);
707 dev_err(info->dev, "failed to allocate register map: %d\n",
708 ret);
709 return ret;
710 }
711
712 /* Support irq domain for SM5502 MUIC device */
713 irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED;
714 ret = devm_regmap_add_irq_chip(info->dev, info->regmap, info->irq,
715 irq_flags, 0, info->type->irq_chip,
716 &info->irq_data);
717 if (ret != 0) {
718 dev_err(info->dev, "failed to request IRQ %d: %d\n",
719 info->irq, ret);
720 return ret;
721 }
722
723 for (i = 0; i < info->type->num_muic_irqs; i++) {
724 struct muic_irq *muic_irq = &info->type->muic_irqs[i];
725 int virq = 0;
726
727 virq = regmap_irq_get_virq(info->irq_data, muic_irq->irq);
728 if (virq <= 0)
729 return -EINVAL;
730 muic_irq->virq = virq;
731
732 ret = devm_request_threaded_irq(info->dev, virq, NULL,
733 sm5502_muic_irq_handler,
734 IRQF_NO_SUSPEND | IRQF_ONESHOT,
735 muic_irq->name, info);
736 if (ret) {
737 dev_err(info->dev,
738 "failed: irq request (IRQ: %d, error :%d)\n",
739 muic_irq->irq, ret);
740 return ret;
741 }
742 }
743
744 /* Allocate extcon device */
745 info->edev = devm_extcon_dev_allocate(info->dev, sm5502_extcon_cable);
746 if (IS_ERR(info->edev)) {
747 dev_err(info->dev, "failed to allocate memory for extcon\n");
748 return -ENOMEM;
749 }
750
751 /* Register extcon device */
752 ret = devm_extcon_dev_register(info->dev, info->edev);
753 if (ret) {
754 dev_err(info->dev, "failed to register extcon device\n");
755 return ret;
756 }
757
758 /*
759 * Detect accessory after completing the initialization of platform
760 *
761 * - Use delayed workqueue to detect cable state and then
762 * notify cable state to notifiee/platform through uevent.
763 * After completing the booting of platform, the extcon provider
764 * driver should notify cable state to upper layer.
765 */
766 INIT_DELAYED_WORK(&info->wq_detcable, sm5502_muic_detect_cable_wq);
767 queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
768 msecs_to_jiffies(DELAY_MS_DEFAULT));
769
770 /* Initialize SM5502 device and print vendor id and version id */
771 sm5502_init_dev_type(info);
772
773 return 0;
774}
775
776static const struct sm5502_type sm5502_data = {
777 .muic_irqs = sm5502_muic_irqs,
778 .num_muic_irqs = ARRAY_SIZE(sm5502_muic_irqs),
779 .irq_chip = &sm5502_muic_irq_chip,
780 .reg_data = sm5502_reg_data,
781 .num_reg_data = ARRAY_SIZE(sm5502_reg_data),
782 .otg_dev_type1 = SM5502_REG_DEV_TYPE1_USB_OTG_MASK,
783 .parse_irq = sm5502_parse_irq,
784};
785
786static const struct sm5502_type sm5504_data = {
787 .muic_irqs = sm5504_muic_irqs,
788 .num_muic_irqs = ARRAY_SIZE(sm5504_muic_irqs),
789 .irq_chip = &sm5504_muic_irq_chip,
790 .reg_data = sm5504_reg_data,
791 .num_reg_data = ARRAY_SIZE(sm5504_reg_data),
792 .otg_dev_type1 = SM5504_REG_DEV_TYPE1_USB_OTG_MASK,
793 .parse_irq = sm5504_parse_irq,
794};
795
796static const struct of_device_id sm5502_dt_match[] = {
797 { .compatible = "siliconmitus,sm5502-muic", .data = &sm5502_data },
798 { .compatible = "siliconmitus,sm5504-muic", .data = &sm5504_data },
799 { .compatible = "siliconmitus,sm5703-muic", .data = &sm5502_data },
800 { },
801};
802MODULE_DEVICE_TABLE(of, sm5502_dt_match);
803
804#ifdef CONFIG_PM_SLEEP
805static int sm5502_muic_suspend(struct device *dev)
806{
807 struct i2c_client *i2c = to_i2c_client(dev);
808 struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
809
810 enable_irq_wake(info->irq);
811
812 return 0;
813}
814
815static int sm5502_muic_resume(struct device *dev)
816{
817 struct i2c_client *i2c = to_i2c_client(dev);
818 struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
819
820 disable_irq_wake(info->irq);
821
822 return 0;
823}
824#endif
825
826static SIMPLE_DEV_PM_OPS(sm5502_muic_pm_ops,
827 sm5502_muic_suspend, sm5502_muic_resume);
828
829static const struct i2c_device_id sm5502_i2c_id[] = {
830 { "sm5502", (kernel_ulong_t)&sm5502_data },
831 { "sm5504", (kernel_ulong_t)&sm5504_data },
832 { "sm5703-muic", (kernel_ulong_t)&sm5502_data },
833 { }
834};
835MODULE_DEVICE_TABLE(i2c, sm5502_i2c_id);
836
837static struct i2c_driver sm5502_muic_i2c_driver = {
838 .driver = {
839 .name = "sm5502",
840 .pm = &sm5502_muic_pm_ops,
841 .of_match_table = sm5502_dt_match,
842 },
843 .probe_new = sm5022_muic_i2c_probe,
844 .id_table = sm5502_i2c_id,
845};
846
847static int __init sm5502_muic_i2c_init(void)
848{
849 return i2c_add_driver(&sm5502_muic_i2c_driver);
850}
851subsys_initcall(sm5502_muic_i2c_init);
852
853MODULE_DESCRIPTION("Silicon Mitus SM5502 Extcon driver");
854MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
855MODULE_LICENSE("GPL");
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * extcon-sm5502.c - Silicon Mitus SM5502 extcon drvier to support USB switches
4 *
5 * Copyright (c) 2014 Samsung Electronics Co., Ltd
6 * Author: Chanwoo Choi <cw00.choi@samsung.com>
7 */
8
9#include <linux/err.h>
10#include <linux/i2c.h>
11#include <linux/interrupt.h>
12#include <linux/irqdomain.h>
13#include <linux/kernel.h>
14#include <linux/module.h>
15#include <linux/platform_device.h>
16#include <linux/regmap.h>
17#include <linux/slab.h>
18#include <linux/extcon-provider.h>
19
20#include "extcon-sm5502.h"
21
22#define DELAY_MS_DEFAULT 17000 /* unit: millisecond */
23
24struct muic_irq {
25 unsigned int irq;
26 const char *name;
27 unsigned int virq;
28};
29
30struct reg_data {
31 u8 reg;
32 unsigned int val;
33 bool invert;
34};
35
36struct sm5502_muic_info {
37 struct device *dev;
38 struct extcon_dev *edev;
39
40 struct i2c_client *i2c;
41 struct regmap *regmap;
42
43 struct regmap_irq_chip_data *irq_data;
44 struct muic_irq *muic_irqs;
45 unsigned int num_muic_irqs;
46 int irq;
47 bool irq_attach;
48 bool irq_detach;
49 struct work_struct irq_work;
50
51 struct reg_data *reg_data;
52 unsigned int num_reg_data;
53
54 struct mutex mutex;
55
56 /*
57 * Use delayed workqueue to detect cable state and then
58 * notify cable state to notifiee/platform through uevent.
59 * After completing the booting of platform, the extcon provider
60 * driver should notify cable state to upper layer.
61 */
62 struct delayed_work wq_detcable;
63};
64
65/* Default value of SM5502 register to bring up MUIC device. */
66static struct reg_data sm5502_reg_data[] = {
67 {
68 .reg = SM5502_REG_RESET,
69 .val = SM5502_REG_RESET_MASK,
70 .invert = true,
71 }, {
72 .reg = SM5502_REG_CONTROL,
73 .val = SM5502_REG_CONTROL_MASK_INT_MASK,
74 .invert = false,
75 }, {
76 .reg = SM5502_REG_INTMASK1,
77 .val = SM5502_REG_INTM1_KP_MASK
78 | SM5502_REG_INTM1_LKP_MASK
79 | SM5502_REG_INTM1_LKR_MASK,
80 .invert = true,
81 }, {
82 .reg = SM5502_REG_INTMASK2,
83 .val = SM5502_REG_INTM2_VBUS_DET_MASK
84 | SM5502_REG_INTM2_REV_ACCE_MASK
85 | SM5502_REG_INTM2_ADC_CHG_MASK
86 | SM5502_REG_INTM2_STUCK_KEY_MASK
87 | SM5502_REG_INTM2_STUCK_KEY_RCV_MASK
88 | SM5502_REG_INTM2_MHL_MASK,
89 .invert = true,
90 },
91 { }
92};
93
94/* List of detectable cables */
95static const unsigned int sm5502_extcon_cable[] = {
96 EXTCON_USB,
97 EXTCON_USB_HOST,
98 EXTCON_CHG_USB_SDP,
99 EXTCON_CHG_USB_DCP,
100 EXTCON_NONE,
101};
102
103/* Define supported accessory type */
104enum sm5502_muic_acc_type {
105 SM5502_MUIC_ADC_GROUND = 0x0,
106 SM5502_MUIC_ADC_SEND_END_BUTTON,
107 SM5502_MUIC_ADC_REMOTE_S1_BUTTON,
108 SM5502_MUIC_ADC_REMOTE_S2_BUTTON,
109 SM5502_MUIC_ADC_REMOTE_S3_BUTTON,
110 SM5502_MUIC_ADC_REMOTE_S4_BUTTON,
111 SM5502_MUIC_ADC_REMOTE_S5_BUTTON,
112 SM5502_MUIC_ADC_REMOTE_S6_BUTTON,
113 SM5502_MUIC_ADC_REMOTE_S7_BUTTON,
114 SM5502_MUIC_ADC_REMOTE_S8_BUTTON,
115 SM5502_MUIC_ADC_REMOTE_S9_BUTTON,
116 SM5502_MUIC_ADC_REMOTE_S10_BUTTON,
117 SM5502_MUIC_ADC_REMOTE_S11_BUTTON,
118 SM5502_MUIC_ADC_REMOTE_S12_BUTTON,
119 SM5502_MUIC_ADC_RESERVED_ACC_1,
120 SM5502_MUIC_ADC_RESERVED_ACC_2,
121 SM5502_MUIC_ADC_RESERVED_ACC_3,
122 SM5502_MUIC_ADC_RESERVED_ACC_4,
123 SM5502_MUIC_ADC_RESERVED_ACC_5,
124 SM5502_MUIC_ADC_AUDIO_TYPE2,
125 SM5502_MUIC_ADC_PHONE_POWERED_DEV,
126 SM5502_MUIC_ADC_TTY_CONVERTER,
127 SM5502_MUIC_ADC_UART_CABLE,
128 SM5502_MUIC_ADC_TYPE1_CHARGER,
129 SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB,
130 SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB,
131 SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE,
132 SM5502_MUIC_ADC_TYPE2_CHARGER,
133 SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART,
134 SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART,
135 SM5502_MUIC_ADC_AUDIO_TYPE1,
136 SM5502_MUIC_ADC_OPEN = 0x1f,
137
138 /*
139 * The below accessories have same ADC value (0x1f or 0x1e).
140 * So, Device type1 is used to separate specific accessory.
141 */
142 /* |---------|--ADC| */
143 /* | [7:5]|[4:0]| */
144 SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE = 0x3e, /* | 001|11110| */
145 SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END = 0x5e, /* | 010|11110| */
146 /* |Dev Type1|--ADC| */
147 SM5502_MUIC_ADC_OPEN_USB = 0x5f, /* | 010|11111| */
148 SM5502_MUIC_ADC_OPEN_TA = 0xdf, /* | 110|11111| */
149 SM5502_MUIC_ADC_OPEN_USB_OTG = 0xff, /* | 111|11111| */
150};
151
152/* List of supported interrupt for SM5502 */
153static struct muic_irq sm5502_muic_irqs[] = {
154 { SM5502_IRQ_INT1_ATTACH, "muic-attach" },
155 { SM5502_IRQ_INT1_DETACH, "muic-detach" },
156 { SM5502_IRQ_INT1_KP, "muic-kp" },
157 { SM5502_IRQ_INT1_LKP, "muic-lkp" },
158 { SM5502_IRQ_INT1_LKR, "muic-lkr" },
159 { SM5502_IRQ_INT1_OVP_EVENT, "muic-ovp-event" },
160 { SM5502_IRQ_INT1_OCP_EVENT, "muic-ocp-event" },
161 { SM5502_IRQ_INT1_OVP_OCP_DIS, "muic-ovp-ocp-dis" },
162 { SM5502_IRQ_INT2_VBUS_DET, "muic-vbus-det" },
163 { SM5502_IRQ_INT2_REV_ACCE, "muic-rev-acce" },
164 { SM5502_IRQ_INT2_ADC_CHG, "muic-adc-chg" },
165 { SM5502_IRQ_INT2_STUCK_KEY, "muic-stuck-key" },
166 { SM5502_IRQ_INT2_STUCK_KEY_RCV, "muic-stuck-key-rcv" },
167 { SM5502_IRQ_INT2_MHL, "muic-mhl" },
168};
169
170/* Define interrupt list of SM5502 to register regmap_irq */
171static const struct regmap_irq sm5502_irqs[] = {
172 /* INT1 interrupts */
173 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_ATTACH_MASK, },
174 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_DETACH_MASK, },
175 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_KP_MASK, },
176 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKP_MASK, },
177 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKR_MASK, },
178 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_EVENT_MASK, },
179 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OCP_EVENT_MASK, },
180 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_OCP_DIS_MASK, },
181
182 /* INT2 interrupts */
183 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_VBUS_DET_MASK,},
184 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_REV_ACCE_MASK, },
185 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_ADC_CHG_MASK, },
186 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_MASK, },
187 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_RCV_MASK, },
188 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_MHL_MASK, },
189};
190
191static const struct regmap_irq_chip sm5502_muic_irq_chip = {
192 .name = "sm5502",
193 .status_base = SM5502_REG_INT1,
194 .mask_base = SM5502_REG_INTMASK1,
195 .mask_invert = false,
196 .num_regs = 2,
197 .irqs = sm5502_irqs,
198 .num_irqs = ARRAY_SIZE(sm5502_irqs),
199};
200
201/* Define regmap configuration of SM5502 for I2C communication */
202static bool sm5502_muic_volatile_reg(struct device *dev, unsigned int reg)
203{
204 switch (reg) {
205 case SM5502_REG_INTMASK1:
206 case SM5502_REG_INTMASK2:
207 return true;
208 default:
209 break;
210 }
211 return false;
212}
213
214static const struct regmap_config sm5502_muic_regmap_config = {
215 .reg_bits = 8,
216 .val_bits = 8,
217 .volatile_reg = sm5502_muic_volatile_reg,
218 .max_register = SM5502_REG_END,
219};
220
221/* Change DM_CON/DP_CON/VBUSIN switch according to cable type */
222static int sm5502_muic_set_path(struct sm5502_muic_info *info,
223 unsigned int con_sw, unsigned int vbus_sw,
224 bool attached)
225{
226 int ret;
227
228 if (!attached) {
229 con_sw = DM_DP_SWITCH_OPEN;
230 vbus_sw = VBUSIN_SWITCH_OPEN;
231 }
232
233 switch (con_sw) {
234 case DM_DP_SWITCH_OPEN:
235 case DM_DP_SWITCH_USB:
236 case DM_DP_SWITCH_AUDIO:
237 case DM_DP_SWITCH_UART:
238 ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1,
239 SM5502_REG_MANUAL_SW1_DP_MASK |
240 SM5502_REG_MANUAL_SW1_DM_MASK,
241 con_sw);
242 if (ret < 0) {
243 dev_err(info->dev,
244 "cannot update DM_CON/DP_CON switch\n");
245 return ret;
246 }
247 break;
248 default:
249 dev_err(info->dev, "Unknown DM_CON/DP_CON switch type (%d)\n",
250 con_sw);
251 return -EINVAL;
252 }
253
254 switch (vbus_sw) {
255 case VBUSIN_SWITCH_OPEN:
256 case VBUSIN_SWITCH_VBUSOUT:
257 case VBUSIN_SWITCH_MIC:
258 case VBUSIN_SWITCH_VBUSOUT_WITH_USB:
259 ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1,
260 SM5502_REG_MANUAL_SW1_VBUSIN_MASK,
261 vbus_sw);
262 if (ret < 0) {
263 dev_err(info->dev,
264 "cannot update VBUSIN switch\n");
265 return ret;
266 }
267 break;
268 default:
269 dev_err(info->dev, "Unknown VBUS switch type (%d)\n", vbus_sw);
270 return -EINVAL;
271 }
272
273 return 0;
274}
275
276/* Return cable type of attached or detached accessories */
277static unsigned int sm5502_muic_get_cable_type(struct sm5502_muic_info *info)
278{
279 unsigned int cable_type, adc, dev_type1;
280 int ret;
281
282 /* Read ADC value according to external cable or button */
283 ret = regmap_read(info->regmap, SM5502_REG_ADC, &adc);
284 if (ret) {
285 dev_err(info->dev, "failed to read ADC register\n");
286 return ret;
287 }
288
289 /*
290 * If ADC is SM5502_MUIC_ADC_GROUND(0x0), external cable hasn't
291 * connected with to MUIC device.
292 */
293 cable_type = adc & SM5502_REG_ADC_MASK;
294 if (cable_type == SM5502_MUIC_ADC_GROUND)
295 return SM5502_MUIC_ADC_GROUND;
296
297 switch (cable_type) {
298 case SM5502_MUIC_ADC_GROUND:
299 case SM5502_MUIC_ADC_SEND_END_BUTTON:
300 case SM5502_MUIC_ADC_REMOTE_S1_BUTTON:
301 case SM5502_MUIC_ADC_REMOTE_S2_BUTTON:
302 case SM5502_MUIC_ADC_REMOTE_S3_BUTTON:
303 case SM5502_MUIC_ADC_REMOTE_S4_BUTTON:
304 case SM5502_MUIC_ADC_REMOTE_S5_BUTTON:
305 case SM5502_MUIC_ADC_REMOTE_S6_BUTTON:
306 case SM5502_MUIC_ADC_REMOTE_S7_BUTTON:
307 case SM5502_MUIC_ADC_REMOTE_S8_BUTTON:
308 case SM5502_MUIC_ADC_REMOTE_S9_BUTTON:
309 case SM5502_MUIC_ADC_REMOTE_S10_BUTTON:
310 case SM5502_MUIC_ADC_REMOTE_S11_BUTTON:
311 case SM5502_MUIC_ADC_REMOTE_S12_BUTTON:
312 case SM5502_MUIC_ADC_RESERVED_ACC_1:
313 case SM5502_MUIC_ADC_RESERVED_ACC_2:
314 case SM5502_MUIC_ADC_RESERVED_ACC_3:
315 case SM5502_MUIC_ADC_RESERVED_ACC_4:
316 case SM5502_MUIC_ADC_RESERVED_ACC_5:
317 case SM5502_MUIC_ADC_AUDIO_TYPE2:
318 case SM5502_MUIC_ADC_PHONE_POWERED_DEV:
319 case SM5502_MUIC_ADC_TTY_CONVERTER:
320 case SM5502_MUIC_ADC_UART_CABLE:
321 case SM5502_MUIC_ADC_TYPE1_CHARGER:
322 case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB:
323 case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB:
324 case SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE:
325 case SM5502_MUIC_ADC_TYPE2_CHARGER:
326 case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART:
327 case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART:
328 break;
329 case SM5502_MUIC_ADC_AUDIO_TYPE1:
330 /*
331 * Check whether cable type is
332 * SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE
333 * or SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END
334 * by using Button event.
335 */
336 break;
337 case SM5502_MUIC_ADC_OPEN:
338 ret = regmap_read(info->regmap, SM5502_REG_DEV_TYPE1,
339 &dev_type1);
340 if (ret) {
341 dev_err(info->dev, "failed to read DEV_TYPE1 reg\n");
342 return ret;
343 }
344
345 switch (dev_type1) {
346 case SM5502_REG_DEV_TYPE1_USB_SDP_MASK:
347 cable_type = SM5502_MUIC_ADC_OPEN_USB;
348 break;
349 case SM5502_REG_DEV_TYPE1_DEDICATED_CHG_MASK:
350 cable_type = SM5502_MUIC_ADC_OPEN_TA;
351 break;
352 case SM5502_REG_DEV_TYPE1_USB_OTG_MASK:
353 cable_type = SM5502_MUIC_ADC_OPEN_USB_OTG;
354 break;
355 default:
356 dev_dbg(info->dev,
357 "cannot identify the cable type: adc(0x%x)\n",
358 adc);
359 return -EINVAL;
360 }
361 break;
362 default:
363 dev_err(info->dev,
364 "failed to identify the cable type: adc(0x%x)\n", adc);
365 return -EINVAL;
366 }
367
368 return cable_type;
369}
370
371static int sm5502_muic_cable_handler(struct sm5502_muic_info *info,
372 bool attached)
373{
374 static unsigned int prev_cable_type = SM5502_MUIC_ADC_GROUND;
375 unsigned int cable_type = SM5502_MUIC_ADC_GROUND;
376 unsigned int con_sw = DM_DP_SWITCH_OPEN;
377 unsigned int vbus_sw = VBUSIN_SWITCH_OPEN;
378 unsigned int id;
379 int ret;
380
381 /* Get the type of attached or detached cable */
382 if (attached)
383 cable_type = sm5502_muic_get_cable_type(info);
384 else
385 cable_type = prev_cable_type;
386 prev_cable_type = cable_type;
387
388 switch (cable_type) {
389 case SM5502_MUIC_ADC_OPEN_USB:
390 id = EXTCON_USB;
391 con_sw = DM_DP_SWITCH_USB;
392 vbus_sw = VBUSIN_SWITCH_VBUSOUT_WITH_USB;
393 break;
394 case SM5502_MUIC_ADC_OPEN_TA:
395 id = EXTCON_CHG_USB_DCP;
396 con_sw = DM_DP_SWITCH_OPEN;
397 vbus_sw = VBUSIN_SWITCH_VBUSOUT;
398 break;
399 case SM5502_MUIC_ADC_OPEN_USB_OTG:
400 id = EXTCON_USB_HOST;
401 con_sw = DM_DP_SWITCH_USB;
402 vbus_sw = VBUSIN_SWITCH_OPEN;
403 break;
404 default:
405 dev_dbg(info->dev,
406 "cannot handle this cable_type (0x%x)\n", cable_type);
407 return 0;
408 }
409
410 /* Change internal hardware path(DM_CON/DP_CON, VBUSIN) */
411 ret = sm5502_muic_set_path(info, con_sw, vbus_sw, attached);
412 if (ret < 0)
413 return ret;
414
415 /* Change the state of external accessory */
416 extcon_set_state_sync(info->edev, id, attached);
417 if (id == EXTCON_USB)
418 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
419 attached);
420
421 return 0;
422}
423
424static void sm5502_muic_irq_work(struct work_struct *work)
425{
426 struct sm5502_muic_info *info = container_of(work,
427 struct sm5502_muic_info, irq_work);
428 int ret = 0;
429
430 if (!info->edev)
431 return;
432
433 mutex_lock(&info->mutex);
434
435 /* Detect attached or detached cables */
436 if (info->irq_attach) {
437 ret = sm5502_muic_cable_handler(info, true);
438 info->irq_attach = false;
439 }
440 if (info->irq_detach) {
441 ret = sm5502_muic_cable_handler(info, false);
442 info->irq_detach = false;
443 }
444
445 if (ret < 0)
446 dev_err(info->dev, "failed to handle MUIC interrupt\n");
447
448 mutex_unlock(&info->mutex);
449}
450
451/*
452 * Sets irq_attach or irq_detach in sm5502_muic_info and returns 0.
453 * Returns -ESRCH if irq_type does not match registered IRQ for this dev type.
454 */
455static int sm5502_parse_irq(struct sm5502_muic_info *info, int irq_type)
456{
457 switch (irq_type) {
458 case SM5502_IRQ_INT1_ATTACH:
459 info->irq_attach = true;
460 break;
461 case SM5502_IRQ_INT1_DETACH:
462 info->irq_detach = true;
463 break;
464 case SM5502_IRQ_INT1_KP:
465 case SM5502_IRQ_INT1_LKP:
466 case SM5502_IRQ_INT1_LKR:
467 case SM5502_IRQ_INT1_OVP_EVENT:
468 case SM5502_IRQ_INT1_OCP_EVENT:
469 case SM5502_IRQ_INT1_OVP_OCP_DIS:
470 case SM5502_IRQ_INT2_VBUS_DET:
471 case SM5502_IRQ_INT2_REV_ACCE:
472 case SM5502_IRQ_INT2_ADC_CHG:
473 case SM5502_IRQ_INT2_STUCK_KEY:
474 case SM5502_IRQ_INT2_STUCK_KEY_RCV:
475 case SM5502_IRQ_INT2_MHL:
476 default:
477 break;
478 }
479
480 return 0;
481}
482
483static irqreturn_t sm5502_muic_irq_handler(int irq, void *data)
484{
485 struct sm5502_muic_info *info = data;
486 int i, irq_type = -1, ret;
487
488 for (i = 0; i < info->num_muic_irqs; i++)
489 if (irq == info->muic_irqs[i].virq)
490 irq_type = info->muic_irqs[i].irq;
491
492 ret = sm5502_parse_irq(info, irq_type);
493 if (ret < 0) {
494 dev_warn(info->dev, "cannot handle is interrupt:%d\n",
495 irq_type);
496 return IRQ_HANDLED;
497 }
498 schedule_work(&info->irq_work);
499
500 return IRQ_HANDLED;
501}
502
503static void sm5502_muic_detect_cable_wq(struct work_struct *work)
504{
505 struct sm5502_muic_info *info = container_of(to_delayed_work(work),
506 struct sm5502_muic_info, wq_detcable);
507 int ret;
508
509 /* Notify the state of connector cable or not */
510 ret = sm5502_muic_cable_handler(info, true);
511 if (ret < 0)
512 dev_warn(info->dev, "failed to detect cable state\n");
513}
514
515static void sm5502_init_dev_type(struct sm5502_muic_info *info)
516{
517 unsigned int reg_data, vendor_id, version_id;
518 int i, ret;
519
520 /* To test I2C, Print version_id and vendor_id of SM5502 */
521 ret = regmap_read(info->regmap, SM5502_REG_DEVICE_ID, ®_data);
522 if (ret) {
523 dev_err(info->dev,
524 "failed to read DEVICE_ID register: %d\n", ret);
525 return;
526 }
527
528 vendor_id = ((reg_data & SM5502_REG_DEVICE_ID_VENDOR_MASK) >>
529 SM5502_REG_DEVICE_ID_VENDOR_SHIFT);
530 version_id = ((reg_data & SM5502_REG_DEVICE_ID_VERSION_MASK) >>
531 SM5502_REG_DEVICE_ID_VERSION_SHIFT);
532
533 dev_info(info->dev, "Device type: version: 0x%x, vendor: 0x%x\n",
534 version_id, vendor_id);
535
536 /* Initiazle the register of SM5502 device to bring-up */
537 for (i = 0; i < info->num_reg_data; i++) {
538 unsigned int val = 0;
539
540 if (!info->reg_data[i].invert)
541 val |= ~info->reg_data[i].val;
542 else
543 val = info->reg_data[i].val;
544 regmap_write(info->regmap, info->reg_data[i].reg, val);
545 }
546}
547
548static int sm5022_muic_i2c_probe(struct i2c_client *i2c,
549 const struct i2c_device_id *id)
550{
551 struct device_node *np = i2c->dev.of_node;
552 struct sm5502_muic_info *info;
553 int i, ret, irq_flags;
554
555 if (!np)
556 return -EINVAL;
557
558 info = devm_kzalloc(&i2c->dev, sizeof(*info), GFP_KERNEL);
559 if (!info)
560 return -ENOMEM;
561 i2c_set_clientdata(i2c, info);
562
563 info->dev = &i2c->dev;
564 info->i2c = i2c;
565 info->irq = i2c->irq;
566 info->muic_irqs = sm5502_muic_irqs;
567 info->num_muic_irqs = ARRAY_SIZE(sm5502_muic_irqs);
568 info->reg_data = sm5502_reg_data;
569 info->num_reg_data = ARRAY_SIZE(sm5502_reg_data);
570
571 mutex_init(&info->mutex);
572
573 INIT_WORK(&info->irq_work, sm5502_muic_irq_work);
574
575 info->regmap = devm_regmap_init_i2c(i2c, &sm5502_muic_regmap_config);
576 if (IS_ERR(info->regmap)) {
577 ret = PTR_ERR(info->regmap);
578 dev_err(info->dev, "failed to allocate register map: %d\n",
579 ret);
580 return ret;
581 }
582
583 /* Support irq domain for SM5502 MUIC device */
584 irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED;
585 ret = regmap_add_irq_chip(info->regmap, info->irq, irq_flags, 0,
586 &sm5502_muic_irq_chip, &info->irq_data);
587 if (ret != 0) {
588 dev_err(info->dev, "failed to request IRQ %d: %d\n",
589 info->irq, ret);
590 return ret;
591 }
592
593 for (i = 0; i < info->num_muic_irqs; i++) {
594 struct muic_irq *muic_irq = &info->muic_irqs[i];
595 int virq = 0;
596
597 virq = regmap_irq_get_virq(info->irq_data, muic_irq->irq);
598 if (virq <= 0)
599 return -EINVAL;
600 muic_irq->virq = virq;
601
602 ret = devm_request_threaded_irq(info->dev, virq, NULL,
603 sm5502_muic_irq_handler,
604 IRQF_NO_SUSPEND | IRQF_ONESHOT,
605 muic_irq->name, info);
606 if (ret) {
607 dev_err(info->dev,
608 "failed: irq request (IRQ: %d, error :%d)\n",
609 muic_irq->irq, ret);
610 return ret;
611 }
612 }
613
614 /* Allocate extcon device */
615 info->edev = devm_extcon_dev_allocate(info->dev, sm5502_extcon_cable);
616 if (IS_ERR(info->edev)) {
617 dev_err(info->dev, "failed to allocate memory for extcon\n");
618 return -ENOMEM;
619 }
620
621 /* Register extcon device */
622 ret = devm_extcon_dev_register(info->dev, info->edev);
623 if (ret) {
624 dev_err(info->dev, "failed to register extcon device\n");
625 return ret;
626 }
627
628 /*
629 * Detect accessory after completing the initialization of platform
630 *
631 * - Use delayed workqueue to detect cable state and then
632 * notify cable state to notifiee/platform through uevent.
633 * After completing the booting of platform, the extcon provider
634 * driver should notify cable state to upper layer.
635 */
636 INIT_DELAYED_WORK(&info->wq_detcable, sm5502_muic_detect_cable_wq);
637 queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
638 msecs_to_jiffies(DELAY_MS_DEFAULT));
639
640 /* Initialize SM5502 device and print vendor id and version id */
641 sm5502_init_dev_type(info);
642
643 return 0;
644}
645
646static int sm5502_muic_i2c_remove(struct i2c_client *i2c)
647{
648 struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
649
650 regmap_del_irq_chip(info->irq, info->irq_data);
651
652 return 0;
653}
654
655static const struct of_device_id sm5502_dt_match[] = {
656 { .compatible = "siliconmitus,sm5502-muic" },
657 { },
658};
659MODULE_DEVICE_TABLE(of, sm5502_dt_match);
660
661#ifdef CONFIG_PM_SLEEP
662static int sm5502_muic_suspend(struct device *dev)
663{
664 struct i2c_client *i2c = to_i2c_client(dev);
665 struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
666
667 enable_irq_wake(info->irq);
668
669 return 0;
670}
671
672static int sm5502_muic_resume(struct device *dev)
673{
674 struct i2c_client *i2c = to_i2c_client(dev);
675 struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
676
677 disable_irq_wake(info->irq);
678
679 return 0;
680}
681#endif
682
683static SIMPLE_DEV_PM_OPS(sm5502_muic_pm_ops,
684 sm5502_muic_suspend, sm5502_muic_resume);
685
686static const struct i2c_device_id sm5502_i2c_id[] = {
687 { "sm5502", TYPE_SM5502 },
688 { }
689};
690MODULE_DEVICE_TABLE(i2c, sm5502_i2c_id);
691
692static struct i2c_driver sm5502_muic_i2c_driver = {
693 .driver = {
694 .name = "sm5502",
695 .pm = &sm5502_muic_pm_ops,
696 .of_match_table = sm5502_dt_match,
697 },
698 .probe = sm5022_muic_i2c_probe,
699 .remove = sm5502_muic_i2c_remove,
700 .id_table = sm5502_i2c_id,
701};
702
703static int __init sm5502_muic_i2c_init(void)
704{
705 return i2c_add_driver(&sm5502_muic_i2c_driver);
706}
707subsys_initcall(sm5502_muic_i2c_init);
708
709MODULE_DESCRIPTION("Silicon Mitus SM5502 Extcon driver");
710MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
711MODULE_LICENSE("GPL");