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
24 struct muic_irq {
25 unsigned int irq;
26 const char *name;
27 unsigned int virq;
28 };
29
30 struct reg_data {
31 u8 reg;
32 unsigned int val;
33 bool invert;
34 };
35
36 struct 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. */
66 static 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 /* List of detectable cables */
94 static const unsigned int sm5502_extcon_cable[] = {
95 EXTCON_USB,
96 EXTCON_USB_HOST,
97 EXTCON_CHG_USB_SDP,
98 EXTCON_CHG_USB_DCP,
99 EXTCON_NONE,
100 };
101
102 /* Define supported accessory type */
103 enum sm5502_muic_acc_type {
104 SM5502_MUIC_ADC_GROUND = 0x0,
105 SM5502_MUIC_ADC_SEND_END_BUTTON,
106 SM5502_MUIC_ADC_REMOTE_S1_BUTTON,
107 SM5502_MUIC_ADC_REMOTE_S2_BUTTON,
108 SM5502_MUIC_ADC_REMOTE_S3_BUTTON,
109 SM5502_MUIC_ADC_REMOTE_S4_BUTTON,
110 SM5502_MUIC_ADC_REMOTE_S5_BUTTON,
111 SM5502_MUIC_ADC_REMOTE_S6_BUTTON,
112 SM5502_MUIC_ADC_REMOTE_S7_BUTTON,
113 SM5502_MUIC_ADC_REMOTE_S8_BUTTON,
114 SM5502_MUIC_ADC_REMOTE_S9_BUTTON,
115 SM5502_MUIC_ADC_REMOTE_S10_BUTTON,
116 SM5502_MUIC_ADC_REMOTE_S11_BUTTON,
117 SM5502_MUIC_ADC_REMOTE_S12_BUTTON,
118 SM5502_MUIC_ADC_RESERVED_ACC_1,
119 SM5502_MUIC_ADC_RESERVED_ACC_2,
120 SM5502_MUIC_ADC_RESERVED_ACC_3,
121 SM5502_MUIC_ADC_RESERVED_ACC_4,
122 SM5502_MUIC_ADC_RESERVED_ACC_5,
123 SM5502_MUIC_ADC_AUDIO_TYPE2,
124 SM5502_MUIC_ADC_PHONE_POWERED_DEV,
125 SM5502_MUIC_ADC_TTY_CONVERTER,
126 SM5502_MUIC_ADC_UART_CABLE,
127 SM5502_MUIC_ADC_TYPE1_CHARGER,
128 SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB,
129 SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB,
130 SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE,
131 SM5502_MUIC_ADC_TYPE2_CHARGER,
132 SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART,
133 SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART,
134 SM5502_MUIC_ADC_AUDIO_TYPE1,
135 SM5502_MUIC_ADC_OPEN = 0x1f,
136
137 /*
138 * The below accessories have same ADC value (0x1f or 0x1e).
139 * So, Device type1 is used to separate specific accessory.
140 */
141 /* |---------|--ADC| */
142 /* | [7:5]|[4:0]| */
143 SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE = 0x3e, /* | 001|11110| */
144 SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END = 0x5e, /* | 010|11110| */
145 /* |Dev Type1|--ADC| */
146 SM5502_MUIC_ADC_OPEN_USB = 0x5f, /* | 010|11111| */
147 SM5502_MUIC_ADC_OPEN_TA = 0xdf, /* | 110|11111| */
148 SM5502_MUIC_ADC_OPEN_USB_OTG = 0xff, /* | 111|11111| */
149 };
150
151 /* List of supported interrupt for SM5502 */
152 static struct muic_irq sm5502_muic_irqs[] = {
153 { SM5502_IRQ_INT1_ATTACH, "muic-attach" },
154 { SM5502_IRQ_INT1_DETACH, "muic-detach" },
155 { SM5502_IRQ_INT1_KP, "muic-kp" },
156 { SM5502_IRQ_INT1_LKP, "muic-lkp" },
157 { SM5502_IRQ_INT1_LKR, "muic-lkr" },
158 { SM5502_IRQ_INT1_OVP_EVENT, "muic-ovp-event" },
159 { SM5502_IRQ_INT1_OCP_EVENT, "muic-ocp-event" },
160 { SM5502_IRQ_INT1_OVP_OCP_DIS, "muic-ovp-ocp-dis" },
161 { SM5502_IRQ_INT2_VBUS_DET, "muic-vbus-det" },
162 { SM5502_IRQ_INT2_REV_ACCE, "muic-rev-acce" },
163 { SM5502_IRQ_INT2_ADC_CHG, "muic-adc-chg" },
164 { SM5502_IRQ_INT2_STUCK_KEY, "muic-stuck-key" },
165 { SM5502_IRQ_INT2_STUCK_KEY_RCV, "muic-stuck-key-rcv" },
166 { SM5502_IRQ_INT2_MHL, "muic-mhl" },
167 };
168
169 /* Define interrupt list of SM5502 to register regmap_irq */
170 static const struct regmap_irq sm5502_irqs[] = {
171 /* INT1 interrupts */
172 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_ATTACH_MASK, },
173 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_DETACH_MASK, },
174 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_KP_MASK, },
175 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKP_MASK, },
176 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKR_MASK, },
177 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_EVENT_MASK, },
178 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OCP_EVENT_MASK, },
179 { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_OCP_DIS_MASK, },
180
181 /* INT2 interrupts */
182 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_VBUS_DET_MASK,},
183 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_REV_ACCE_MASK, },
184 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_ADC_CHG_MASK, },
185 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_MASK, },
186 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_RCV_MASK, },
187 { .reg_offset = 1, .mask = SM5502_IRQ_INT2_MHL_MASK, },
188 };
189
190 static const struct regmap_irq_chip sm5502_muic_irq_chip = {
191 .name = "sm5502",
192 .status_base = SM5502_REG_INT1,
193 .mask_base = SM5502_REG_INTMASK1,
194 .mask_invert = false,
195 .num_regs = 2,
196 .irqs = sm5502_irqs,
197 .num_irqs = ARRAY_SIZE(sm5502_irqs),
198 };
199
200 /* Define regmap configuration of SM5502 for I2C communication */
sm5502_muic_volatile_reg(struct device * dev,unsigned int reg)201 static bool sm5502_muic_volatile_reg(struct device *dev, unsigned int reg)
202 {
203 switch (reg) {
204 case SM5502_REG_INTMASK1:
205 case SM5502_REG_INTMASK2:
206 return true;
207 default:
208 break;
209 }
210 return false;
211 }
212
213 static const struct regmap_config sm5502_muic_regmap_config = {
214 .reg_bits = 8,
215 .val_bits = 8,
216 .volatile_reg = sm5502_muic_volatile_reg,
217 .max_register = SM5502_REG_END,
218 };
219
220 /* Change DM_CON/DP_CON/VBUSIN switch according to cable type */
sm5502_muic_set_path(struct sm5502_muic_info * info,unsigned int con_sw,unsigned int vbus_sw,bool attached)221 static int sm5502_muic_set_path(struct sm5502_muic_info *info,
222 unsigned int con_sw, unsigned int vbus_sw,
223 bool attached)
224 {
225 int ret;
226
227 if (!attached) {
228 con_sw = DM_DP_SWITCH_OPEN;
229 vbus_sw = VBUSIN_SWITCH_OPEN;
230 }
231
232 switch (con_sw) {
233 case DM_DP_SWITCH_OPEN:
234 case DM_DP_SWITCH_USB:
235 case DM_DP_SWITCH_AUDIO:
236 case DM_DP_SWITCH_UART:
237 ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1,
238 SM5502_REG_MANUAL_SW1_DP_MASK |
239 SM5502_REG_MANUAL_SW1_DM_MASK,
240 con_sw);
241 if (ret < 0) {
242 dev_err(info->dev,
243 "cannot update DM_CON/DP_CON switch\n");
244 return ret;
245 }
246 break;
247 default:
248 dev_err(info->dev, "Unknown DM_CON/DP_CON switch type (%d)\n",
249 con_sw);
250 return -EINVAL;
251 }
252
253 switch (vbus_sw) {
254 case VBUSIN_SWITCH_OPEN:
255 case VBUSIN_SWITCH_VBUSOUT:
256 case VBUSIN_SWITCH_MIC:
257 case VBUSIN_SWITCH_VBUSOUT_WITH_USB:
258 ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1,
259 SM5502_REG_MANUAL_SW1_VBUSIN_MASK,
260 vbus_sw);
261 if (ret < 0) {
262 dev_err(info->dev,
263 "cannot update VBUSIN switch\n");
264 return ret;
265 }
266 break;
267 default:
268 dev_err(info->dev, "Unknown VBUS switch type (%d)\n", vbus_sw);
269 return -EINVAL;
270 }
271
272 return 0;
273 }
274
275 /* Return cable type of attached or detached accessories */
sm5502_muic_get_cable_type(struct sm5502_muic_info * info)276 static unsigned int sm5502_muic_get_cable_type(struct sm5502_muic_info *info)
277 {
278 unsigned int cable_type, adc, dev_type1;
279 int ret;
280
281 /* Read ADC value according to external cable or button */
282 ret = regmap_read(info->regmap, SM5502_REG_ADC, &adc);
283 if (ret) {
284 dev_err(info->dev, "failed to read ADC register\n");
285 return ret;
286 }
287
288 /*
289 * If ADC is SM5502_MUIC_ADC_GROUND(0x0), external cable hasn't
290 * connected with to MUIC device.
291 */
292 cable_type = adc & SM5502_REG_ADC_MASK;
293 if (cable_type == SM5502_MUIC_ADC_GROUND)
294 return SM5502_MUIC_ADC_GROUND;
295
296 switch (cable_type) {
297 case SM5502_MUIC_ADC_GROUND:
298 case SM5502_MUIC_ADC_SEND_END_BUTTON:
299 case SM5502_MUIC_ADC_REMOTE_S1_BUTTON:
300 case SM5502_MUIC_ADC_REMOTE_S2_BUTTON:
301 case SM5502_MUIC_ADC_REMOTE_S3_BUTTON:
302 case SM5502_MUIC_ADC_REMOTE_S4_BUTTON:
303 case SM5502_MUIC_ADC_REMOTE_S5_BUTTON:
304 case SM5502_MUIC_ADC_REMOTE_S6_BUTTON:
305 case SM5502_MUIC_ADC_REMOTE_S7_BUTTON:
306 case SM5502_MUIC_ADC_REMOTE_S8_BUTTON:
307 case SM5502_MUIC_ADC_REMOTE_S9_BUTTON:
308 case SM5502_MUIC_ADC_REMOTE_S10_BUTTON:
309 case SM5502_MUIC_ADC_REMOTE_S11_BUTTON:
310 case SM5502_MUIC_ADC_REMOTE_S12_BUTTON:
311 case SM5502_MUIC_ADC_RESERVED_ACC_1:
312 case SM5502_MUIC_ADC_RESERVED_ACC_2:
313 case SM5502_MUIC_ADC_RESERVED_ACC_3:
314 case SM5502_MUIC_ADC_RESERVED_ACC_4:
315 case SM5502_MUIC_ADC_RESERVED_ACC_5:
316 case SM5502_MUIC_ADC_AUDIO_TYPE2:
317 case SM5502_MUIC_ADC_PHONE_POWERED_DEV:
318 case SM5502_MUIC_ADC_TTY_CONVERTER:
319 case SM5502_MUIC_ADC_UART_CABLE:
320 case SM5502_MUIC_ADC_TYPE1_CHARGER:
321 case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB:
322 case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB:
323 case SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE:
324 case SM5502_MUIC_ADC_TYPE2_CHARGER:
325 case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART:
326 case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART:
327 break;
328 case SM5502_MUIC_ADC_AUDIO_TYPE1:
329 /*
330 * Check whether cable type is
331 * SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE
332 * or SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END
333 * by using Button event.
334 */
335 break;
336 case SM5502_MUIC_ADC_OPEN:
337 ret = regmap_read(info->regmap, SM5502_REG_DEV_TYPE1,
338 &dev_type1);
339 if (ret) {
340 dev_err(info->dev, "failed to read DEV_TYPE1 reg\n");
341 return ret;
342 }
343
344 switch (dev_type1) {
345 case SM5502_REG_DEV_TYPE1_USB_SDP_MASK:
346 cable_type = SM5502_MUIC_ADC_OPEN_USB;
347 break;
348 case SM5502_REG_DEV_TYPE1_DEDICATED_CHG_MASK:
349 cable_type = SM5502_MUIC_ADC_OPEN_TA;
350 break;
351 case SM5502_REG_DEV_TYPE1_USB_OTG_MASK:
352 cable_type = SM5502_MUIC_ADC_OPEN_USB_OTG;
353 break;
354 default:
355 dev_dbg(info->dev,
356 "cannot identify the cable type: adc(0x%x)\n",
357 adc);
358 return -EINVAL;
359 }
360 break;
361 default:
362 dev_err(info->dev,
363 "failed to identify the cable type: adc(0x%x)\n", adc);
364 return -EINVAL;
365 }
366
367 return cable_type;
368 }
369
sm5502_muic_cable_handler(struct sm5502_muic_info * info,bool attached)370 static int sm5502_muic_cable_handler(struct sm5502_muic_info *info,
371 bool attached)
372 {
373 static unsigned int prev_cable_type = SM5502_MUIC_ADC_GROUND;
374 unsigned int cable_type = SM5502_MUIC_ADC_GROUND;
375 unsigned int con_sw = DM_DP_SWITCH_OPEN;
376 unsigned int vbus_sw = VBUSIN_SWITCH_OPEN;
377 unsigned int id;
378 int ret;
379
380 /* Get the type of attached or detached cable */
381 if (attached)
382 cable_type = sm5502_muic_get_cable_type(info);
383 else
384 cable_type = prev_cable_type;
385 prev_cable_type = cable_type;
386
387 switch (cable_type) {
388 case SM5502_MUIC_ADC_OPEN_USB:
389 id = EXTCON_USB;
390 con_sw = DM_DP_SWITCH_USB;
391 vbus_sw = VBUSIN_SWITCH_VBUSOUT_WITH_USB;
392 break;
393 case SM5502_MUIC_ADC_OPEN_TA:
394 id = EXTCON_CHG_USB_DCP;
395 con_sw = DM_DP_SWITCH_OPEN;
396 vbus_sw = VBUSIN_SWITCH_VBUSOUT;
397 break;
398 case SM5502_MUIC_ADC_OPEN_USB_OTG:
399 id = EXTCON_USB_HOST;
400 con_sw = DM_DP_SWITCH_USB;
401 vbus_sw = VBUSIN_SWITCH_OPEN;
402 break;
403 default:
404 dev_dbg(info->dev,
405 "cannot handle this cable_type (0x%x)\n", cable_type);
406 return 0;
407 }
408
409 /* Change internal hardware path(DM_CON/DP_CON, VBUSIN) */
410 ret = sm5502_muic_set_path(info, con_sw, vbus_sw, attached);
411 if (ret < 0)
412 return ret;
413
414 /* Change the state of external accessory */
415 extcon_set_state_sync(info->edev, id, attached);
416 if (id == EXTCON_USB)
417 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
418 attached);
419
420 return 0;
421 }
422
sm5502_muic_irq_work(struct work_struct * work)423 static void sm5502_muic_irq_work(struct work_struct *work)
424 {
425 struct sm5502_muic_info *info = container_of(work,
426 struct sm5502_muic_info, irq_work);
427 int ret = 0;
428
429 if (!info->edev)
430 return;
431
432 mutex_lock(&info->mutex);
433
434 /* Detect attached or detached cables */
435 if (info->irq_attach) {
436 ret = sm5502_muic_cable_handler(info, true);
437 info->irq_attach = false;
438 }
439 if (info->irq_detach) {
440 ret = sm5502_muic_cable_handler(info, false);
441 info->irq_detach = false;
442 }
443
444 if (ret < 0)
445 dev_err(info->dev, "failed to handle MUIC interrupt\n");
446
447 mutex_unlock(&info->mutex);
448 }
449
450 /*
451 * Sets irq_attach or irq_detach in sm5502_muic_info and returns 0.
452 * Returns -ESRCH if irq_type does not match registered IRQ for this dev type.
453 */
sm5502_parse_irq(struct sm5502_muic_info * info,int irq_type)454 static int sm5502_parse_irq(struct sm5502_muic_info *info, int irq_type)
455 {
456 switch (irq_type) {
457 case SM5502_IRQ_INT1_ATTACH:
458 info->irq_attach = true;
459 break;
460 case SM5502_IRQ_INT1_DETACH:
461 info->irq_detach = true;
462 break;
463 case SM5502_IRQ_INT1_KP:
464 case SM5502_IRQ_INT1_LKP:
465 case SM5502_IRQ_INT1_LKR:
466 case SM5502_IRQ_INT1_OVP_EVENT:
467 case SM5502_IRQ_INT1_OCP_EVENT:
468 case SM5502_IRQ_INT1_OVP_OCP_DIS:
469 case SM5502_IRQ_INT2_VBUS_DET:
470 case SM5502_IRQ_INT2_REV_ACCE:
471 case SM5502_IRQ_INT2_ADC_CHG:
472 case SM5502_IRQ_INT2_STUCK_KEY:
473 case SM5502_IRQ_INT2_STUCK_KEY_RCV:
474 case SM5502_IRQ_INT2_MHL:
475 default:
476 break;
477 }
478
479 return 0;
480 }
481
sm5502_muic_irq_handler(int irq,void * data)482 static irqreturn_t sm5502_muic_irq_handler(int irq, void *data)
483 {
484 struct sm5502_muic_info *info = data;
485 int i, irq_type = -1, ret;
486
487 for (i = 0; i < info->num_muic_irqs; i++)
488 if (irq == info->muic_irqs[i].virq)
489 irq_type = info->muic_irqs[i].irq;
490
491 ret = sm5502_parse_irq(info, irq_type);
492 if (ret < 0) {
493 dev_warn(info->dev, "cannot handle is interrupt:%d\n",
494 irq_type);
495 return IRQ_HANDLED;
496 }
497 schedule_work(&info->irq_work);
498
499 return IRQ_HANDLED;
500 }
501
sm5502_muic_detect_cable_wq(struct work_struct * work)502 static void sm5502_muic_detect_cable_wq(struct work_struct *work)
503 {
504 struct sm5502_muic_info *info = container_of(to_delayed_work(work),
505 struct sm5502_muic_info, wq_detcable);
506 int ret;
507
508 /* Notify the state of connector cable or not */
509 ret = sm5502_muic_cable_handler(info, true);
510 if (ret < 0)
511 dev_warn(info->dev, "failed to detect cable state\n");
512 }
513
sm5502_init_dev_type(struct sm5502_muic_info * info)514 static void sm5502_init_dev_type(struct sm5502_muic_info *info)
515 {
516 unsigned int reg_data, vendor_id, version_id;
517 int i, ret;
518
519 /* To test I2C, Print version_id and vendor_id of SM5502 */
520 ret = regmap_read(info->regmap, SM5502_REG_DEVICE_ID, ®_data);
521 if (ret) {
522 dev_err(info->dev,
523 "failed to read DEVICE_ID register: %d\n", ret);
524 return;
525 }
526
527 vendor_id = ((reg_data & SM5502_REG_DEVICE_ID_VENDOR_MASK) >>
528 SM5502_REG_DEVICE_ID_VENDOR_SHIFT);
529 version_id = ((reg_data & SM5502_REG_DEVICE_ID_VERSION_MASK) >>
530 SM5502_REG_DEVICE_ID_VERSION_SHIFT);
531
532 dev_info(info->dev, "Device type: version: 0x%x, vendor: 0x%x\n",
533 version_id, vendor_id);
534
535 /* Initiazle the register of SM5502 device to bring-up */
536 for (i = 0; i < info->num_reg_data; i++) {
537 unsigned int val = 0;
538
539 if (!info->reg_data[i].invert)
540 val |= ~info->reg_data[i].val;
541 else
542 val = info->reg_data[i].val;
543 regmap_write(info->regmap, info->reg_data[i].reg, val);
544 }
545 }
546
sm5022_muic_i2c_probe(struct i2c_client * i2c,const struct i2c_device_id * id)547 static int sm5022_muic_i2c_probe(struct i2c_client *i2c,
548 const struct i2c_device_id *id)
549 {
550 struct device_node *np = i2c->dev.of_node;
551 struct sm5502_muic_info *info;
552 int i, ret, irq_flags;
553
554 if (!np)
555 return -EINVAL;
556
557 info = devm_kzalloc(&i2c->dev, sizeof(*info), GFP_KERNEL);
558 if (!info)
559 return -ENOMEM;
560 i2c_set_clientdata(i2c, info);
561
562 info->dev = &i2c->dev;
563 info->i2c = i2c;
564 info->irq = i2c->irq;
565 info->muic_irqs = sm5502_muic_irqs;
566 info->num_muic_irqs = ARRAY_SIZE(sm5502_muic_irqs);
567 info->reg_data = sm5502_reg_data;
568 info->num_reg_data = ARRAY_SIZE(sm5502_reg_data);
569
570 mutex_init(&info->mutex);
571
572 INIT_WORK(&info->irq_work, sm5502_muic_irq_work);
573
574 info->regmap = devm_regmap_init_i2c(i2c, &sm5502_muic_regmap_config);
575 if (IS_ERR(info->regmap)) {
576 ret = PTR_ERR(info->regmap);
577 dev_err(info->dev, "failed to allocate register map: %d\n",
578 ret);
579 return ret;
580 }
581
582 /* Support irq domain for SM5502 MUIC device */
583 irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED;
584 ret = regmap_add_irq_chip(info->regmap, info->irq, irq_flags, 0,
585 &sm5502_muic_irq_chip, &info->irq_data);
586 if (ret != 0) {
587 dev_err(info->dev, "failed to request IRQ %d: %d\n",
588 info->irq, ret);
589 return ret;
590 }
591
592 for (i = 0; i < info->num_muic_irqs; i++) {
593 struct muic_irq *muic_irq = &info->muic_irqs[i];
594 int virq = 0;
595
596 virq = regmap_irq_get_virq(info->irq_data, muic_irq->irq);
597 if (virq <= 0)
598 return -EINVAL;
599 muic_irq->virq = virq;
600
601 ret = devm_request_threaded_irq(info->dev, virq, NULL,
602 sm5502_muic_irq_handler,
603 IRQF_NO_SUSPEND | IRQF_ONESHOT,
604 muic_irq->name, info);
605 if (ret) {
606 dev_err(info->dev,
607 "failed: irq request (IRQ: %d, error :%d)\n",
608 muic_irq->irq, ret);
609 return ret;
610 }
611 }
612
613 /* Allocate extcon device */
614 info->edev = devm_extcon_dev_allocate(info->dev, sm5502_extcon_cable);
615 if (IS_ERR(info->edev)) {
616 dev_err(info->dev, "failed to allocate memory for extcon\n");
617 return -ENOMEM;
618 }
619
620 /* Register extcon device */
621 ret = devm_extcon_dev_register(info->dev, info->edev);
622 if (ret) {
623 dev_err(info->dev, "failed to register extcon device\n");
624 return ret;
625 }
626
627 /*
628 * Detect accessory after completing the initialization of platform
629 *
630 * - Use delayed workqueue to detect cable state and then
631 * notify cable state to notifiee/platform through uevent.
632 * After completing the booting of platform, the extcon provider
633 * driver should notify cable state to upper layer.
634 */
635 INIT_DELAYED_WORK(&info->wq_detcable, sm5502_muic_detect_cable_wq);
636 queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
637 msecs_to_jiffies(DELAY_MS_DEFAULT));
638
639 /* Initialize SM5502 device and print vendor id and version id */
640 sm5502_init_dev_type(info);
641
642 return 0;
643 }
644
sm5502_muic_i2c_remove(struct i2c_client * i2c)645 static int sm5502_muic_i2c_remove(struct i2c_client *i2c)
646 {
647 struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
648
649 regmap_del_irq_chip(info->irq, info->irq_data);
650
651 return 0;
652 }
653
654 static const struct of_device_id sm5502_dt_match[] = {
655 { .compatible = "siliconmitus,sm5502-muic" },
656 { },
657 };
658 MODULE_DEVICE_TABLE(of, sm5502_dt_match);
659
660 #ifdef CONFIG_PM_SLEEP
sm5502_muic_suspend(struct device * dev)661 static int sm5502_muic_suspend(struct device *dev)
662 {
663 struct i2c_client *i2c = to_i2c_client(dev);
664 struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
665
666 enable_irq_wake(info->irq);
667
668 return 0;
669 }
670
sm5502_muic_resume(struct device * dev)671 static int sm5502_muic_resume(struct device *dev)
672 {
673 struct i2c_client *i2c = to_i2c_client(dev);
674 struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
675
676 disable_irq_wake(info->irq);
677
678 return 0;
679 }
680 #endif
681
682 static SIMPLE_DEV_PM_OPS(sm5502_muic_pm_ops,
683 sm5502_muic_suspend, sm5502_muic_resume);
684
685 static const struct i2c_device_id sm5502_i2c_id[] = {
686 { "sm5502", TYPE_SM5502 },
687 { }
688 };
689 MODULE_DEVICE_TABLE(i2c, sm5502_i2c_id);
690
691 static struct i2c_driver sm5502_muic_i2c_driver = {
692 .driver = {
693 .name = "sm5502",
694 .pm = &sm5502_muic_pm_ops,
695 .of_match_table = sm5502_dt_match,
696 },
697 .probe = sm5022_muic_i2c_probe,
698 .remove = sm5502_muic_i2c_remove,
699 .id_table = sm5502_i2c_id,
700 };
701
sm5502_muic_i2c_init(void)702 static int __init sm5502_muic_i2c_init(void)
703 {
704 return i2c_add_driver(&sm5502_muic_i2c_driver);
705 }
706 subsys_initcall(sm5502_muic_i2c_init);
707
708 MODULE_DESCRIPTION("Silicon Mitus SM5502 Extcon driver");
709 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
710 MODULE_LICENSE("GPL");
711