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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 .mask_invert = false,
231 .num_regs = 2,
232 .irqs = sm5502_irqs,
233 .num_irqs = ARRAY_SIZE(sm5502_irqs),
234};
235
236/* List of supported interrupt for SM5504 */
237static struct muic_irq sm5504_muic_irqs[] = {
238 { SM5504_IRQ_INT1_ATTACH, "muic-attach" },
239 { SM5504_IRQ_INT1_DETACH, "muic-detach" },
240 { SM5504_IRQ_INT1_CHG_DET, "muic-chg-det" },
241 { SM5504_IRQ_INT1_DCD_OUT, "muic-dcd-out" },
242 { SM5504_IRQ_INT1_OVP_EVENT, "muic-ovp-event" },
243 { SM5504_IRQ_INT1_CONNECT, "muic-connect" },
244 { SM5504_IRQ_INT1_ADC_CHG, "muic-adc-chg" },
245 { SM5504_IRQ_INT2_RID_CHG, "muic-rid-chg" },
246 { SM5504_IRQ_INT2_UVLO, "muic-uvlo" },
247 { SM5504_IRQ_INT2_POR, "muic-por" },
248 { SM5504_IRQ_INT2_OVP_FET, "muic-ovp-fet" },
249 { SM5504_IRQ_INT2_OCP_LATCH, "muic-ocp-latch" },
250 { SM5504_IRQ_INT2_OCP_EVENT, "muic-ocp-event" },
251 { SM5504_IRQ_INT2_OVP_OCP_EVENT, "muic-ovp-ocp-event" },
252};
253
254/* Define interrupt list of SM5504 to register regmap_irq */
255static const struct regmap_irq sm5504_irqs[] = {
256 /* INT1 interrupts */
257 { .reg_offset = 0, .mask = SM5504_IRQ_INT1_ATTACH_MASK, },
258 { .reg_offset = 0, .mask = SM5504_IRQ_INT1_DETACH_MASK, },
259 { .reg_offset = 0, .mask = SM5504_IRQ_INT1_CHG_DET_MASK, },
260 { .reg_offset = 0, .mask = SM5504_IRQ_INT1_DCD_OUT_MASK, },
261 { .reg_offset = 0, .mask = SM5504_IRQ_INT1_OVP_MASK, },
262 { .reg_offset = 0, .mask = SM5504_IRQ_INT1_CONNECT_MASK, },
263 { .reg_offset = 0, .mask = SM5504_IRQ_INT1_ADC_CHG_MASK, },
264
265 /* INT2 interrupts */
266 { .reg_offset = 1, .mask = SM5504_IRQ_INT2_RID_CHG_MASK,},
267 { .reg_offset = 1, .mask = SM5504_IRQ_INT2_UVLO_MASK, },
268 { .reg_offset = 1, .mask = SM5504_IRQ_INT2_POR_MASK, },
269 { .reg_offset = 1, .mask = SM5504_IRQ_INT2_OVP_FET_MASK, },
270 { .reg_offset = 1, .mask = SM5504_IRQ_INT2_OCP_LATCH_MASK, },
271 { .reg_offset = 1, .mask = SM5504_IRQ_INT2_OCP_EVENT_MASK, },
272 { .reg_offset = 1, .mask = SM5504_IRQ_INT2_OVP_OCP_EVENT_MASK, },
273};
274
275static const struct regmap_irq_chip sm5504_muic_irq_chip = {
276 .name = "sm5504",
277 .status_base = SM5502_REG_INT1,
278 .mask_base = SM5502_REG_INTMASK1,
279 .mask_invert = false,
280 .num_regs = 2,
281 .irqs = sm5504_irqs,
282 .num_irqs = ARRAY_SIZE(sm5504_irqs),
283};
284
285/* Define regmap configuration of SM5502 for I2C communication */
286static bool sm5502_muic_volatile_reg(struct device *dev, unsigned int reg)
287{
288 switch (reg) {
289 case SM5502_REG_INTMASK1:
290 case SM5502_REG_INTMASK2:
291 return true;
292 default:
293 break;
294 }
295 return false;
296}
297
298static const struct regmap_config sm5502_muic_regmap_config = {
299 .reg_bits = 8,
300 .val_bits = 8,
301 .volatile_reg = sm5502_muic_volatile_reg,
302 .max_register = SM5502_REG_END,
303};
304
305/* Change DM_CON/DP_CON/VBUSIN switch according to cable type */
306static int sm5502_muic_set_path(struct sm5502_muic_info *info,
307 unsigned int con_sw, unsigned int vbus_sw,
308 bool attached)
309{
310 int ret;
311
312 if (!attached) {
313 con_sw = DM_DP_SWITCH_OPEN;
314 vbus_sw = VBUSIN_SWITCH_OPEN;
315 }
316
317 switch (con_sw) {
318 case DM_DP_SWITCH_OPEN:
319 case DM_DP_SWITCH_USB:
320 case DM_DP_SWITCH_AUDIO:
321 case DM_DP_SWITCH_UART:
322 ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1,
323 SM5502_REG_MANUAL_SW1_DP_MASK |
324 SM5502_REG_MANUAL_SW1_DM_MASK,
325 con_sw);
326 if (ret < 0) {
327 dev_err(info->dev,
328 "cannot update DM_CON/DP_CON switch\n");
329 return ret;
330 }
331 break;
332 default:
333 dev_err(info->dev, "Unknown DM_CON/DP_CON switch type (%d)\n",
334 con_sw);
335 return -EINVAL;
336 }
337
338 switch (vbus_sw) {
339 case VBUSIN_SWITCH_OPEN:
340 case VBUSIN_SWITCH_VBUSOUT:
341 case VBUSIN_SWITCH_MIC:
342 case VBUSIN_SWITCH_VBUSOUT_WITH_USB:
343 ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1,
344 SM5502_REG_MANUAL_SW1_VBUSIN_MASK,
345 vbus_sw);
346 if (ret < 0) {
347 dev_err(info->dev,
348 "cannot update VBUSIN switch\n");
349 return ret;
350 }
351 break;
352 default:
353 dev_err(info->dev, "Unknown VBUS switch type (%d)\n", vbus_sw);
354 return -EINVAL;
355 }
356
357 return 0;
358}
359
360/* Return cable type of attached or detached accessories */
361static unsigned int sm5502_muic_get_cable_type(struct sm5502_muic_info *info)
362{
363 unsigned int cable_type, adc, dev_type1;
364 int ret;
365
366 /* Read ADC value according to external cable or button */
367 ret = regmap_read(info->regmap, SM5502_REG_ADC, &adc);
368 if (ret) {
369 dev_err(info->dev, "failed to read ADC register\n");
370 return ret;
371 }
372
373 /*
374 * If ADC is SM5502_MUIC_ADC_GROUND(0x0), external cable hasn't
375 * connected with to MUIC device.
376 */
377 cable_type = adc & SM5502_REG_ADC_MASK;
378
379 switch (cable_type) {
380 case SM5502_MUIC_ADC_GROUND:
381 ret = regmap_read(info->regmap, SM5502_REG_DEV_TYPE1,
382 &dev_type1);
383 if (ret) {
384 dev_err(info->dev, "failed to read DEV_TYPE1 reg\n");
385 return ret;
386 }
387
388 if (dev_type1 == info->type->otg_dev_type1) {
389 cable_type = SM5502_MUIC_ADC_GROUND_USB_OTG;
390 } else {
391 dev_dbg(info->dev,
392 "cannot identify the cable type: adc(0x%x), dev_type1(0x%x)\n",
393 adc, dev_type1);
394 return -EINVAL;
395 }
396 break;
397 case SM5502_MUIC_ADC_SEND_END_BUTTON:
398 case SM5502_MUIC_ADC_REMOTE_S1_BUTTON:
399 case SM5502_MUIC_ADC_REMOTE_S2_BUTTON:
400 case SM5502_MUIC_ADC_REMOTE_S3_BUTTON:
401 case SM5502_MUIC_ADC_REMOTE_S4_BUTTON:
402 case SM5502_MUIC_ADC_REMOTE_S5_BUTTON:
403 case SM5502_MUIC_ADC_REMOTE_S6_BUTTON:
404 case SM5502_MUIC_ADC_REMOTE_S7_BUTTON:
405 case SM5502_MUIC_ADC_REMOTE_S8_BUTTON:
406 case SM5502_MUIC_ADC_REMOTE_S9_BUTTON:
407 case SM5502_MUIC_ADC_REMOTE_S10_BUTTON:
408 case SM5502_MUIC_ADC_REMOTE_S11_BUTTON:
409 case SM5502_MUIC_ADC_REMOTE_S12_BUTTON:
410 case SM5502_MUIC_ADC_RESERVED_ACC_1:
411 case SM5502_MUIC_ADC_RESERVED_ACC_2:
412 case SM5502_MUIC_ADC_RESERVED_ACC_3:
413 case SM5502_MUIC_ADC_RESERVED_ACC_4:
414 case SM5502_MUIC_ADC_RESERVED_ACC_5:
415 case SM5502_MUIC_ADC_AUDIO_TYPE2:
416 case SM5502_MUIC_ADC_PHONE_POWERED_DEV:
417 case SM5502_MUIC_ADC_TTY_CONVERTER:
418 case SM5502_MUIC_ADC_UART_CABLE:
419 case SM5502_MUIC_ADC_TYPE1_CHARGER:
420 case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB:
421 case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB:
422 case SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE:
423 case SM5502_MUIC_ADC_TYPE2_CHARGER:
424 case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART:
425 case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART:
426 break;
427 case SM5502_MUIC_ADC_AUDIO_TYPE1:
428 /*
429 * Check whether cable type is
430 * SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE
431 * or SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END
432 * by using Button event.
433 */
434 break;
435 case SM5502_MUIC_ADC_OPEN:
436 ret = regmap_read(info->regmap, SM5502_REG_DEV_TYPE1,
437 &dev_type1);
438 if (ret) {
439 dev_err(info->dev, "failed to read DEV_TYPE1 reg\n");
440 return ret;
441 }
442
443 if (dev_type1 == info->type->otg_dev_type1) {
444 cable_type = SM5502_MUIC_ADC_OPEN_USB_OTG;
445 break;
446 }
447
448 switch (dev_type1) {
449 case SM5502_REG_DEV_TYPE1_USB_SDP_MASK:
450 cable_type = SM5502_MUIC_ADC_OPEN_USB;
451 break;
452 case SM5502_REG_DEV_TYPE1_DEDICATED_CHG_MASK:
453 cable_type = SM5502_MUIC_ADC_OPEN_TA;
454 break;
455 default:
456 dev_dbg(info->dev,
457 "cannot identify the cable type: adc(0x%x)\n",
458 adc);
459 return -EINVAL;
460 }
461 break;
462 default:
463 dev_err(info->dev,
464 "failed to identify the cable type: adc(0x%x)\n", adc);
465 return -EINVAL;
466 }
467
468 return cable_type;
469}
470
471static int sm5502_muic_cable_handler(struct sm5502_muic_info *info,
472 bool attached)
473{
474 static unsigned int prev_cable_type = SM5502_MUIC_ADC_GROUND;
475 unsigned int cable_type = SM5502_MUIC_ADC_GROUND;
476 unsigned int con_sw = DM_DP_SWITCH_OPEN;
477 unsigned int vbus_sw = VBUSIN_SWITCH_OPEN;
478 unsigned int id;
479 int ret;
480
481 /* Get the type of attached or detached cable */
482 if (attached)
483 cable_type = sm5502_muic_get_cable_type(info);
484 else
485 cable_type = prev_cable_type;
486 prev_cable_type = cable_type;
487
488 switch (cable_type) {
489 case SM5502_MUIC_ADC_OPEN_USB:
490 id = EXTCON_USB;
491 con_sw = DM_DP_SWITCH_USB;
492 vbus_sw = VBUSIN_SWITCH_VBUSOUT_WITH_USB;
493 break;
494 case SM5502_MUIC_ADC_OPEN_TA:
495 id = EXTCON_CHG_USB_DCP;
496 con_sw = DM_DP_SWITCH_OPEN;
497 vbus_sw = VBUSIN_SWITCH_VBUSOUT;
498 break;
499 case SM5502_MUIC_ADC_GROUND_USB_OTG:
500 case SM5502_MUIC_ADC_OPEN_USB_OTG:
501 id = EXTCON_USB_HOST;
502 con_sw = DM_DP_SWITCH_USB;
503 vbus_sw = VBUSIN_SWITCH_OPEN;
504 break;
505 default:
506 dev_dbg(info->dev,
507 "cannot handle this cable_type (0x%x)\n", cable_type);
508 return 0;
509 }
510
511 /* Change internal hardware path(DM_CON/DP_CON, VBUSIN) */
512 ret = sm5502_muic_set_path(info, con_sw, vbus_sw, attached);
513 if (ret < 0)
514 return ret;
515
516 /* Change the state of external accessory */
517 extcon_set_state_sync(info->edev, id, attached);
518 if (id == EXTCON_USB)
519 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
520 attached);
521
522 return 0;
523}
524
525static void sm5502_muic_irq_work(struct work_struct *work)
526{
527 struct sm5502_muic_info *info = container_of(work,
528 struct sm5502_muic_info, irq_work);
529 int ret = 0;
530
531 if (!info->edev)
532 return;
533
534 mutex_lock(&info->mutex);
535
536 /* Detect attached or detached cables */
537 if (info->irq_attach) {
538 ret = sm5502_muic_cable_handler(info, true);
539 info->irq_attach = false;
540 }
541 if (info->irq_detach) {
542 ret = sm5502_muic_cable_handler(info, false);
543 info->irq_detach = false;
544 }
545
546 if (ret < 0)
547 dev_err(info->dev, "failed to handle MUIC interrupt\n");
548
549 mutex_unlock(&info->mutex);
550}
551
552/*
553 * Sets irq_attach or irq_detach in sm5502_muic_info and returns 0.
554 * Returns -ESRCH if irq_type does not match registered IRQ for this dev type.
555 */
556static int sm5502_parse_irq(struct sm5502_muic_info *info, int irq_type)
557{
558 switch (irq_type) {
559 case SM5502_IRQ_INT1_ATTACH:
560 info->irq_attach = true;
561 break;
562 case SM5502_IRQ_INT1_DETACH:
563 info->irq_detach = true;
564 break;
565 case SM5502_IRQ_INT1_KP:
566 case SM5502_IRQ_INT1_LKP:
567 case SM5502_IRQ_INT1_LKR:
568 case SM5502_IRQ_INT1_OVP_EVENT:
569 case SM5502_IRQ_INT1_OCP_EVENT:
570 case SM5502_IRQ_INT1_OVP_OCP_DIS:
571 case SM5502_IRQ_INT2_VBUS_DET:
572 case SM5502_IRQ_INT2_REV_ACCE:
573 case SM5502_IRQ_INT2_ADC_CHG:
574 case SM5502_IRQ_INT2_STUCK_KEY:
575 case SM5502_IRQ_INT2_STUCK_KEY_RCV:
576 case SM5502_IRQ_INT2_MHL:
577 default:
578 break;
579 }
580
581 return 0;
582}
583
584static int sm5504_parse_irq(struct sm5502_muic_info *info, int irq_type)
585{
586 switch (irq_type) {
587 case SM5504_IRQ_INT1_ATTACH:
588 info->irq_attach = true;
589 break;
590 case SM5504_IRQ_INT1_DETACH:
591 info->irq_detach = true;
592 break;
593 case SM5504_IRQ_INT1_CHG_DET:
594 case SM5504_IRQ_INT1_DCD_OUT:
595 case SM5504_IRQ_INT1_OVP_EVENT:
596 case SM5504_IRQ_INT1_CONNECT:
597 case SM5504_IRQ_INT1_ADC_CHG:
598 case SM5504_IRQ_INT2_RID_CHG:
599 case SM5504_IRQ_INT2_UVLO:
600 case SM5504_IRQ_INT2_POR:
601 case SM5504_IRQ_INT2_OVP_FET:
602 case SM5504_IRQ_INT2_OCP_LATCH:
603 case SM5504_IRQ_INT2_OCP_EVENT:
604 case SM5504_IRQ_INT2_OVP_OCP_EVENT:
605 default:
606 break;
607 }
608
609 return 0;
610}
611
612static irqreturn_t sm5502_muic_irq_handler(int irq, void *data)
613{
614 struct sm5502_muic_info *info = data;
615 int i, irq_type = -1, ret;
616
617 for (i = 0; i < info->type->num_muic_irqs; i++)
618 if (irq == info->type->muic_irqs[i].virq)
619 irq_type = info->type->muic_irqs[i].irq;
620
621 ret = info->type->parse_irq(info, irq_type);
622 if (ret < 0) {
623 dev_warn(info->dev, "cannot handle is interrupt:%d\n",
624 irq_type);
625 return IRQ_HANDLED;
626 }
627 schedule_work(&info->irq_work);
628
629 return IRQ_HANDLED;
630}
631
632static void sm5502_muic_detect_cable_wq(struct work_struct *work)
633{
634 struct sm5502_muic_info *info = container_of(to_delayed_work(work),
635 struct sm5502_muic_info, wq_detcable);
636 int ret;
637
638 /* Notify the state of connector cable or not */
639 ret = sm5502_muic_cable_handler(info, true);
640 if (ret < 0)
641 dev_warn(info->dev, "failed to detect cable state\n");
642}
643
644static void sm5502_init_dev_type(struct sm5502_muic_info *info)
645{
646 unsigned int reg_data, vendor_id, version_id;
647 int i, ret;
648
649 /* To test I2C, Print version_id and vendor_id of SM5502 */
650 ret = regmap_read(info->regmap, SM5502_REG_DEVICE_ID, ®_data);
651 if (ret) {
652 dev_err(info->dev,
653 "failed to read DEVICE_ID register: %d\n", ret);
654 return;
655 }
656
657 vendor_id = ((reg_data & SM5502_REG_DEVICE_ID_VENDOR_MASK) >>
658 SM5502_REG_DEVICE_ID_VENDOR_SHIFT);
659 version_id = ((reg_data & SM5502_REG_DEVICE_ID_VERSION_MASK) >>
660 SM5502_REG_DEVICE_ID_VERSION_SHIFT);
661
662 dev_info(info->dev, "Device type: version: 0x%x, vendor: 0x%x\n",
663 version_id, vendor_id);
664
665 /* Initiazle the register of SM5502 device to bring-up */
666 for (i = 0; i < info->type->num_reg_data; i++) {
667 unsigned int val = 0;
668
669 if (!info->type->reg_data[i].invert)
670 val |= ~info->type->reg_data[i].val;
671 else
672 val = info->type->reg_data[i].val;
673 regmap_write(info->regmap, info->type->reg_data[i].reg, val);
674 }
675}
676
677static int sm5022_muic_i2c_probe(struct i2c_client *i2c)
678{
679 struct device_node *np = i2c->dev.of_node;
680 struct sm5502_muic_info *info;
681 int i, ret, irq_flags;
682
683 if (!np)
684 return -EINVAL;
685
686 info = devm_kzalloc(&i2c->dev, sizeof(*info), GFP_KERNEL);
687 if (!info)
688 return -ENOMEM;
689 i2c_set_clientdata(i2c, info);
690
691 info->dev = &i2c->dev;
692 info->i2c = i2c;
693 info->irq = i2c->irq;
694 info->type = device_get_match_data(info->dev);
695 if (!info->type)
696 return -EINVAL;
697 if (!info->type->parse_irq) {
698 dev_err(info->dev, "parse_irq missing in struct sm5502_type\n");
699 return -EINVAL;
700 }
701
702 mutex_init(&info->mutex);
703
704 INIT_WORK(&info->irq_work, sm5502_muic_irq_work);
705
706 info->regmap = devm_regmap_init_i2c(i2c, &sm5502_muic_regmap_config);
707 if (IS_ERR(info->regmap)) {
708 ret = PTR_ERR(info->regmap);
709 dev_err(info->dev, "failed to allocate register map: %d\n",
710 ret);
711 return ret;
712 }
713
714 /* Support irq domain for SM5502 MUIC device */
715 irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED;
716 ret = devm_regmap_add_irq_chip(info->dev, info->regmap, info->irq,
717 irq_flags, 0, info->type->irq_chip,
718 &info->irq_data);
719 if (ret != 0) {
720 dev_err(info->dev, "failed to request IRQ %d: %d\n",
721 info->irq, ret);
722 return ret;
723 }
724
725 for (i = 0; i < info->type->num_muic_irqs; i++) {
726 struct muic_irq *muic_irq = &info->type->muic_irqs[i];
727 int virq = 0;
728
729 virq = regmap_irq_get_virq(info->irq_data, muic_irq->irq);
730 if (virq <= 0)
731 return -EINVAL;
732 muic_irq->virq = virq;
733
734 ret = devm_request_threaded_irq(info->dev, virq, NULL,
735 sm5502_muic_irq_handler,
736 IRQF_NO_SUSPEND | IRQF_ONESHOT,
737 muic_irq->name, info);
738 if (ret) {
739 dev_err(info->dev,
740 "failed: irq request (IRQ: %d, error :%d)\n",
741 muic_irq->irq, ret);
742 return ret;
743 }
744 }
745
746 /* Allocate extcon device */
747 info->edev = devm_extcon_dev_allocate(info->dev, sm5502_extcon_cable);
748 if (IS_ERR(info->edev)) {
749 dev_err(info->dev, "failed to allocate memory for extcon\n");
750 return -ENOMEM;
751 }
752
753 /* Register extcon device */
754 ret = devm_extcon_dev_register(info->dev, info->edev);
755 if (ret) {
756 dev_err(info->dev, "failed to register extcon device\n");
757 return ret;
758 }
759
760 /*
761 * Detect accessory after completing the initialization of platform
762 *
763 * - Use delayed workqueue to detect cable state and then
764 * notify cable state to notifiee/platform through uevent.
765 * After completing the booting of platform, the extcon provider
766 * driver should notify cable state to upper layer.
767 */
768 INIT_DELAYED_WORK(&info->wq_detcable, sm5502_muic_detect_cable_wq);
769 queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
770 msecs_to_jiffies(DELAY_MS_DEFAULT));
771
772 /* Initialize SM5502 device and print vendor id and version id */
773 sm5502_init_dev_type(info);
774
775 return 0;
776}
777
778static const struct sm5502_type sm5502_data = {
779 .muic_irqs = sm5502_muic_irqs,
780 .num_muic_irqs = ARRAY_SIZE(sm5502_muic_irqs),
781 .irq_chip = &sm5502_muic_irq_chip,
782 .reg_data = sm5502_reg_data,
783 .num_reg_data = ARRAY_SIZE(sm5502_reg_data),
784 .otg_dev_type1 = SM5502_REG_DEV_TYPE1_USB_OTG_MASK,
785 .parse_irq = sm5502_parse_irq,
786};
787
788static const struct sm5502_type sm5504_data = {
789 .muic_irqs = sm5504_muic_irqs,
790 .num_muic_irqs = ARRAY_SIZE(sm5504_muic_irqs),
791 .irq_chip = &sm5504_muic_irq_chip,
792 .reg_data = sm5504_reg_data,
793 .num_reg_data = ARRAY_SIZE(sm5504_reg_data),
794 .otg_dev_type1 = SM5504_REG_DEV_TYPE1_USB_OTG_MASK,
795 .parse_irq = sm5504_parse_irq,
796};
797
798static const struct of_device_id sm5502_dt_match[] = {
799 { .compatible = "siliconmitus,sm5502-muic", .data = &sm5502_data },
800 { .compatible = "siliconmitus,sm5504-muic", .data = &sm5504_data },
801 { },
802};
803MODULE_DEVICE_TABLE(of, sm5502_dt_match);
804
805#ifdef CONFIG_PM_SLEEP
806static int sm5502_muic_suspend(struct device *dev)
807{
808 struct i2c_client *i2c = to_i2c_client(dev);
809 struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
810
811 enable_irq_wake(info->irq);
812
813 return 0;
814}
815
816static int sm5502_muic_resume(struct device *dev)
817{
818 struct i2c_client *i2c = to_i2c_client(dev);
819 struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
820
821 disable_irq_wake(info->irq);
822
823 return 0;
824}
825#endif
826
827static SIMPLE_DEV_PM_OPS(sm5502_muic_pm_ops,
828 sm5502_muic_suspend, sm5502_muic_resume);
829
830static const struct i2c_device_id sm5502_i2c_id[] = {
831 { "sm5502", (kernel_ulong_t)&sm5502_data },
832 { "sm5504", (kernel_ulong_t)&sm5504_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");