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-rw-r--r--drivers/extcon/Kconfig12
-rw-r--r--drivers/extcon/Makefile1
-rw-r--r--drivers/extcon/extcon-rt8973a.c740
-rw-r--r--drivers/extcon/extcon-rt8973a.h203
4 files changed, 956 insertions, 0 deletions
diff --git a/drivers/extcon/Kconfig b/drivers/extcon/Kconfig
index 764f3a113e0a..6a1f7de6fa54 100644
--- a/drivers/extcon/Kconfig
+++ b/drivers/extcon/Kconfig
@@ -70,6 +70,18 @@ config EXTCON_PALMAS
70 Say Y here to enable support for USB peripheral and USB host 70 Say Y here to enable support for USB peripheral and USB host
71 detection by palmas usb. 71 detection by palmas usb.
72 72
73config EXTCON_RT8973A
74 tristate "RT8973A EXTCON support"
75 depends on I2C
76 select IRQ_DOMAIN
77 select REGMAP_I2C
78 select REGMAP_IRQ
79 help
80 If you say yes here you get support for the MUIC device of
81 Richtek RT8973A. The RT8973A is a USB port accessory detector
82 and switch that is optimized to protect low voltage system
83 from abnormal high input voltage (up to 28V).
84
73config EXTCON_SM5502 85config EXTCON_SM5502
74 tristate "SM5502 EXTCON support" 86 tristate "SM5502 EXTCON support"
75 depends on I2C 87 depends on I2C
diff --git a/drivers/extcon/Makefile b/drivers/extcon/Makefile
index b38546eb522a..0370b42e5a27 100644
--- a/drivers/extcon/Makefile
+++ b/drivers/extcon/Makefile
@@ -10,4 +10,5 @@ obj-$(CONFIG_EXTCON_MAX14577) += extcon-max14577.o
10obj-$(CONFIG_EXTCON_MAX77693) += extcon-max77693.o 10obj-$(CONFIG_EXTCON_MAX77693) += extcon-max77693.o
11obj-$(CONFIG_EXTCON_MAX8997) += extcon-max8997.o 11obj-$(CONFIG_EXTCON_MAX8997) += extcon-max8997.o
12obj-$(CONFIG_EXTCON_PALMAS) += extcon-palmas.o 12obj-$(CONFIG_EXTCON_PALMAS) += extcon-palmas.o
13obj-$(CONFIG_EXTCON_RT8973A) += extcon-rt8973a.o
13obj-$(CONFIG_EXTCON_SM5502) += extcon-sm5502.o 14obj-$(CONFIG_EXTCON_SM5502) += extcon-sm5502.o
diff --git a/drivers/extcon/extcon-rt8973a.c b/drivers/extcon/extcon-rt8973a.c
new file mode 100644
index 000000000000..a784b2d5ee72
--- /dev/null
+++ b/drivers/extcon/extcon-rt8973a.c
@@ -0,0 +1,740 @@
1/*
2 * extcon-rt8973a.c - Richtek RT8973A extcon driver to support USB switches
3 *
4 * Copyright (c) 2014 Samsung Electronics Co., Ltd
5 * Author: Chanwoo Choi <cw00.choi@samsung.com>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
11 */
12
13#include <linux/err.h>
14#include <linux/i2c.h>
15#include <linux/input.h>
16#include <linux/interrupt.h>
17#include <linux/irqdomain.h>
18#include <linux/kernel.h>
19#include <linux/module.h>
20#include <linux/platform_device.h>
21#include <linux/regmap.h>
22#include <linux/slab.h>
23#include <linux/extcon.h>
24
25#include "extcon-rt8973a.h"
26
27#define DELAY_MS_DEFAULT 20000 /* unit: millisecond */
28
29struct muic_irq {
30 unsigned int irq;
31 const char *name;
32 unsigned int virq;
33};
34
35struct reg_data {
36 u8 reg;
37 u8 mask;
38 u8 val;
39 bool invert;
40};
41
42struct rt8973a_muic_info {
43 struct device *dev;
44 struct extcon_dev *edev;
45
46 struct i2c_client *i2c;
47 struct regmap *regmap;
48
49 struct regmap_irq_chip_data *irq_data;
50 struct muic_irq *muic_irqs;
51 unsigned int num_muic_irqs;
52 int irq;
53 bool irq_attach;
54 bool irq_detach;
55 bool irq_ovp;
56 bool irq_otp;
57 struct work_struct irq_work;
58
59 struct reg_data *reg_data;
60 unsigned int num_reg_data;
61 bool auto_config;
62
63 struct mutex mutex;
64
65 /*
66 * Use delayed workqueue to detect cable state and then
67 * notify cable state to notifiee/platform through uevent.
68 * After completing the booting of platform, the extcon provider
69 * driver should notify cable state to upper layer.
70 */
71 struct delayed_work wq_detcable;
72};
73
74/* Default value of RT8973A register to bring up MUIC device. */
75static struct reg_data rt8973a_reg_data[] = {
76 {
77 .reg = RT8973A_REG_CONTROL1,
78 .mask = RT8973A_REG_CONTROL1_ADC_EN_MASK
79 | RT8973A_REG_CONTROL1_USB_CHD_EN_MASK
80 | RT8973A_REG_CONTROL1_CHGTYP_MASK
81 | RT8973A_REG_CONTROL1_SWITCH_OPEN_MASK
82 | RT8973A_REG_CONTROL1_AUTO_CONFIG_MASK
83 | RT8973A_REG_CONTROL1_INTM_MASK,
84 .val = RT8973A_REG_CONTROL1_ADC_EN_MASK
85 | RT8973A_REG_CONTROL1_USB_CHD_EN_MASK
86 | RT8973A_REG_CONTROL1_CHGTYP_MASK,
87 .invert = false,
88 },
89 { /* sentinel */ }
90};
91
92/* List of detectable cables */
93enum {
94 EXTCON_CABLE_USB = 0,
95 EXTCON_CABLE_USB_HOST,
96 EXTCON_CABLE_TA,
97 EXTCON_CABLE_JIG_OFF_USB,
98 EXTCON_CABLE_JIG_ON_USB,
99 EXTCON_CABLE_JIG_OFF_UART,
100 EXTCON_CABLE_JIG_ON_UART,
101
102 EXTCON_CABLE_END,
103};
104
105static const char *rt8973a_extcon_cable[] = {
106 [EXTCON_CABLE_USB] = "USB",
107 [EXTCON_CABLE_USB_HOST] = "USB-Host",
108 [EXTCON_CABLE_TA] = "TA",
109 [EXTCON_CABLE_JIG_OFF_USB] = "JIG-USB-OFF",
110 [EXTCON_CABLE_JIG_ON_USB] = "JIG-USB-ON",
111 [EXTCON_CABLE_JIG_OFF_UART] = "JIG-UART-OFF",
112 [EXTCON_CABLE_JIG_ON_UART] = "JIG-UART-ON",
113 NULL,
114};
115
116/* Define OVP (Over Voltage Protection), OTP (Over Temperature Protection) */
117enum rt8973a_event_type {
118 RT8973A_EVENT_ATTACH = 1,
119 RT8973A_EVENT_DETACH,
120 RT8973A_EVENT_OVP,
121 RT8973A_EVENT_OTP,
122};
123
124/* Define supported accessory type */
125enum rt8973a_muic_acc_type {
126 RT8973A_MUIC_ADC_OTG = 0x0,
127 RT8973A_MUIC_ADC_AUDIO_SEND_END_BUTTON,
128 RT8973A_MUIC_ADC_AUDIO_REMOTE_S1_BUTTON,
129 RT8973A_MUIC_ADC_AUDIO_REMOTE_S2_BUTTON,
130 RT8973A_MUIC_ADC_AUDIO_REMOTE_S3_BUTTON,
131 RT8973A_MUIC_ADC_AUDIO_REMOTE_S4_BUTTON,
132 RT8973A_MUIC_ADC_AUDIO_REMOTE_S5_BUTTON,
133 RT8973A_MUIC_ADC_AUDIO_REMOTE_S6_BUTTON,
134 RT8973A_MUIC_ADC_AUDIO_REMOTE_S7_BUTTON,
135 RT8973A_MUIC_ADC_AUDIO_REMOTE_S8_BUTTON,
136 RT8973A_MUIC_ADC_AUDIO_REMOTE_S9_BUTTON,
137 RT8973A_MUIC_ADC_AUDIO_REMOTE_S10_BUTTON,
138 RT8973A_MUIC_ADC_AUDIO_REMOTE_S11_BUTTON,
139 RT8973A_MUIC_ADC_AUDIO_REMOTE_S12_BUTTON,
140 RT8973A_MUIC_ADC_RESERVED_ACC_1,
141 RT8973A_MUIC_ADC_RESERVED_ACC_2,
142 RT8973A_MUIC_ADC_RESERVED_ACC_3,
143 RT8973A_MUIC_ADC_RESERVED_ACC_4,
144 RT8973A_MUIC_ADC_RESERVED_ACC_5,
145 RT8973A_MUIC_ADC_AUDIO_TYPE2,
146 RT8973A_MUIC_ADC_PHONE_POWERED_DEV,
147 RT8973A_MUIC_ADC_UNKNOWN_ACC_1,
148 RT8973A_MUIC_ADC_UNKNOWN_ACC_2,
149 RT8973A_MUIC_ADC_TA,
150 RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB,
151 RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB,
152 RT8973A_MUIC_ADC_UNKNOWN_ACC_3,
153 RT8973A_MUIC_ADC_UNKNOWN_ACC_4,
154 RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART,
155 RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART,
156 RT8973A_MUIC_ADC_UNKNOWN_ACC_5,
157 RT8973A_MUIC_ADC_OPEN = 0x1f,
158
159 /* The below accessories has same ADC value (0x1f).
160 So, Device type1 is used to separate specific accessory. */
161 /* |---------|--ADC| */
162 /* | [7:5]|[4:0]| */
163 RT8973A_MUIC_ADC_USB = 0x3f, /* | 001|11111| */
164};
165
166/* List of supported interrupt for RT8973A */
167static struct muic_irq rt8973a_muic_irqs[] = {
168 { RT8973A_INT1_ATTACH, "muic-attach" },
169 { RT8973A_INT1_DETACH, "muic-detach" },
170 { RT8973A_INT1_CHGDET, "muic-chgdet" },
171 { RT8973A_INT1_DCD_T, "muic-dcd-t" },
172 { RT8973A_INT1_OVP, "muic-ovp" },
173 { RT8973A_INT1_CONNECT, "muic-connect" },
174 { RT8973A_INT1_ADC_CHG, "muic-adc-chg" },
175 { RT8973A_INT1_OTP, "muic-otp" },
176 { RT8973A_INT2_UVLO, "muic-uvlo" },
177 { RT8973A_INT2_POR, "muic-por" },
178 { RT8973A_INT2_OTP_FET, "muic-otp-fet" },
179 { RT8973A_INT2_OVP_FET, "muic-ovp-fet" },
180 { RT8973A_INT2_OCP_LATCH, "muic-ocp-latch" },
181 { RT8973A_INT2_OCP, "muic-ocp" },
182 { RT8973A_INT2_OVP_OCP, "muic-ovp-ocp" },
183};
184
185/* Define interrupt list of RT8973A to register regmap_irq */
186static const struct regmap_irq rt8973a_irqs[] = {
187 /* INT1 interrupts */
188 { .reg_offset = 0, .mask = RT8973A_INT1_ATTACH_MASK, },
189 { .reg_offset = 0, .mask = RT8973A_INT1_DETACH_MASK, },
190 { .reg_offset = 0, .mask = RT8973A_INT1_CHGDET_MASK, },
191 { .reg_offset = 0, .mask = RT8973A_INT1_DCD_T_MASK, },
192 { .reg_offset = 0, .mask = RT8973A_INT1_OVP_MASK, },
193 { .reg_offset = 0, .mask = RT8973A_INT1_CONNECT_MASK, },
194 { .reg_offset = 0, .mask = RT8973A_INT1_ADC_CHG_MASK, },
195 { .reg_offset = 0, .mask = RT8973A_INT1_OTP_MASK, },
196
197 /* INT2 interrupts */
198 { .reg_offset = 1, .mask = RT8973A_INT2_UVLOT_MASK,},
199 { .reg_offset = 1, .mask = RT8973A_INT2_POR_MASK, },
200 { .reg_offset = 1, .mask = RT8973A_INT2_OTP_FET_MASK, },
201 { .reg_offset = 1, .mask = RT8973A_INT2_OVP_FET_MASK, },
202 { .reg_offset = 1, .mask = RT8973A_INT2_OCP_LATCH_MASK, },
203 { .reg_offset = 1, .mask = RT8973A_INT2_OCP_MASK, },
204 { .reg_offset = 1, .mask = RT8973A_INT2_OVP_OCP_MASK, },
205};
206
207static const struct regmap_irq_chip rt8973a_muic_irq_chip = {
208 .name = "rt8973a",
209 .status_base = RT8973A_REG_INT1,
210 .mask_base = RT8973A_REG_INTM1,
211 .mask_invert = false,
212 .num_regs = 2,
213 .irqs = rt8973a_irqs,
214 .num_irqs = ARRAY_SIZE(rt8973a_irqs),
215};
216
217/* Define regmap configuration of RT8973A for I2C communication */
218static bool rt8973a_muic_volatile_reg(struct device *dev, unsigned int reg)
219{
220 switch (reg) {
221 case RT8973A_REG_INTM1:
222 case RT8973A_REG_INTM2:
223 return true;
224 default:
225 break;
226 }
227 return false;
228}
229
230static const struct regmap_config rt8973a_muic_regmap_config = {
231 .reg_bits = 8,
232 .val_bits = 8,
233 .volatile_reg = rt8973a_muic_volatile_reg,
234 .max_register = RT8973A_REG_END,
235};
236
237/* Change DM_CON/DP_CON/VBUSIN switch according to cable type */
238static int rt8973a_muic_set_path(struct rt8973a_muic_info *info,
239 unsigned int con_sw, bool attached)
240{
241 int ret;
242
243 /*
244 * Don't need to set h/w path according to cable type
245 * if Auto-configuration mode of CONTROL1 register is true.
246 */
247 if (info->auto_config)
248 return 0;
249
250 if (!attached)
251 con_sw = DM_DP_SWITCH_UART;
252
253 switch (con_sw) {
254 case DM_DP_SWITCH_OPEN:
255 case DM_DP_SWITCH_USB:
256 case DM_DP_SWITCH_UART:
257 ret = regmap_update_bits(info->regmap, RT8973A_REG_MANUAL_SW1,
258 RT8973A_REG_MANUAL_SW1_DP_MASK |
259 RT8973A_REG_MANUAL_SW1_DM_MASK,
260 con_sw);
261 if (ret < 0) {
262 dev_err(info->dev,
263 "cannot update DM_CON/DP_CON switch\n");
264 return ret;
265 }
266 break;
267 default:
268 dev_err(info->dev, "Unknown DM_CON/DP_CON switch type (%d)\n",
269 con_sw);
270 return -EINVAL;
271 }
272
273 return 0;
274}
275
276static int rt8973a_muic_get_cable_type(struct rt8973a_muic_info *info)
277{
278 unsigned int adc, dev1;
279 int ret, cable_type;
280
281 /* Read ADC value according to external cable or button */
282 ret = regmap_read(info->regmap, RT8973A_REG_ADC, &adc);
283 if (ret) {
284 dev_err(info->dev, "failed to read ADC register\n");
285 return ret;
286 }
287 cable_type = adc & RT8973A_REG_ADC_MASK;
288
289 /* Read Device 1 reigster to identify correct cable type */
290 ret = regmap_read(info->regmap, RT8973A_REG_DEV1, &dev1);
291 if (ret) {
292 dev_err(info->dev, "failed to read DEV1 register\n");
293 return ret;
294 }
295
296 switch (adc) {
297 case RT8973A_MUIC_ADC_OPEN:
298 if (dev1 & RT8973A_REG_DEV1_USB_MASK)
299 cable_type = RT8973A_MUIC_ADC_USB;
300 else if (dev1 & RT8973A_REG_DEV1_DCPORT_MASK)
301 cable_type = RT8973A_MUIC_ADC_TA;
302 else
303 cable_type = RT8973A_MUIC_ADC_OPEN;
304 break;
305 default:
306 break;
307 }
308
309 return cable_type;
310}
311
312static int rt8973a_muic_cable_handler(struct rt8973a_muic_info *info,
313 enum rt8973a_event_type event)
314{
315 static unsigned int prev_cable_type;
316 const char **cable_names = info->edev->supported_cable;
317 unsigned int con_sw = DM_DP_SWITCH_UART;
318 int ret, idx = 0, cable_type;
319 bool attached = false;
320
321 if (!cable_names)
322 return 0;
323
324 switch (event) {
325 case RT8973A_EVENT_ATTACH:
326 cable_type = rt8973a_muic_get_cable_type(info);
327 attached = true;
328 break;
329 case RT8973A_EVENT_DETACH:
330 cable_type = prev_cable_type;
331 attached = false;
332 break;
333 case RT8973A_EVENT_OVP:
334 case RT8973A_EVENT_OTP:
335 dev_warn(info->dev,
336 "happen Over %s issue. Need to disconnect all cables\n",
337 event == RT8973A_EVENT_OVP ? "Voltage" : "Temperature");
338 cable_type = prev_cable_type;
339 attached = false;
340 break;
341 default:
342 dev_err(info->dev,
343 "Cannot handle this event (event:%d)\n", event);
344 return -EINVAL;
345 }
346 prev_cable_type = cable_type;
347
348 switch (cable_type) {
349 case RT8973A_MUIC_ADC_OTG:
350 idx = EXTCON_CABLE_USB_HOST;
351 con_sw = DM_DP_SWITCH_USB;
352 break;
353 case RT8973A_MUIC_ADC_TA:
354 idx = EXTCON_CABLE_TA;
355 con_sw = DM_DP_SWITCH_OPEN;
356 break;
357 case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB:
358 idx = EXTCON_CABLE_JIG_OFF_USB;
359 con_sw = DM_DP_SWITCH_UART;
360 break;
361 case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB:
362 idx = EXTCON_CABLE_JIG_ON_USB;
363 con_sw = DM_DP_SWITCH_UART;
364 break;
365 case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART:
366 idx = EXTCON_CABLE_JIG_OFF_UART;
367 con_sw = DM_DP_SWITCH_UART;
368 break;
369 case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART:
370 idx = EXTCON_CABLE_JIG_ON_UART;
371 con_sw = DM_DP_SWITCH_UART;
372 break;
373 case RT8973A_MUIC_ADC_USB:
374 idx = EXTCON_CABLE_USB;
375 con_sw = DM_DP_SWITCH_USB;
376 break;
377 case RT8973A_MUIC_ADC_OPEN:
378 return 0;
379 case RT8973A_MUIC_ADC_UNKNOWN_ACC_1:
380 case RT8973A_MUIC_ADC_UNKNOWN_ACC_2:
381 case RT8973A_MUIC_ADC_UNKNOWN_ACC_3:
382 case RT8973A_MUIC_ADC_UNKNOWN_ACC_4:
383 case RT8973A_MUIC_ADC_UNKNOWN_ACC_5:
384 dev_warn(info->dev,
385 "Unknown accessory type (adc:0x%x)\n", cable_type);
386 return 0;
387 case RT8973A_MUIC_ADC_AUDIO_SEND_END_BUTTON:
388 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S1_BUTTON:
389 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S2_BUTTON:
390 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S3_BUTTON:
391 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S4_BUTTON:
392 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S5_BUTTON:
393 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S6_BUTTON:
394 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S7_BUTTON:
395 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S8_BUTTON:
396 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S9_BUTTON:
397 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S10_BUTTON:
398 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S11_BUTTON:
399 case RT8973A_MUIC_ADC_AUDIO_REMOTE_S12_BUTTON:
400 case RT8973A_MUIC_ADC_AUDIO_TYPE2:
401 dev_warn(info->dev,
402 "Audio device/button type (adc:0x%x)\n", cable_type);
403 return 0;
404 case RT8973A_MUIC_ADC_RESERVED_ACC_1:
405 case RT8973A_MUIC_ADC_RESERVED_ACC_2:
406 case RT8973A_MUIC_ADC_RESERVED_ACC_3:
407 case RT8973A_MUIC_ADC_RESERVED_ACC_4:
408 case RT8973A_MUIC_ADC_RESERVED_ACC_5:
409 case RT8973A_MUIC_ADC_PHONE_POWERED_DEV:
410 return 0;
411 default:
412 dev_err(info->dev,
413 "Cannot handle this cable_type (adc:0x%x)\n",
414 cable_type);
415 return -EINVAL;
416 }
417
418 /* Change internal hardware path(DM_CON/DP_CON) */
419 ret = rt8973a_muic_set_path(info, con_sw, attached);
420 if (ret < 0)
421 return ret;
422
423 /* Change the state of external accessory */
424 extcon_set_cable_state(info->edev, cable_names[idx], attached);
425
426 return 0;
427}
428
429static void rt8973a_muic_irq_work(struct work_struct *work)
430{
431 struct rt8973a_muic_info *info = container_of(work,
432 struct rt8973a_muic_info, irq_work);
433 int ret = 0;
434
435 if (!info->edev)
436 return;
437
438 mutex_lock(&info->mutex);
439
440 /* Detect attached or detached cables */
441 if (info->irq_attach) {
442 ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_ATTACH);
443 info->irq_attach = false;
444 }
445
446 if (info->irq_detach) {
447 ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_DETACH);
448 info->irq_detach = false;
449 }
450
451 if (info->irq_ovp) {
452 ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_OVP);
453 info->irq_ovp = false;
454 }
455
456 if (info->irq_otp) {
457 ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_OTP);
458 info->irq_otp = false;
459 }
460
461 if (ret < 0)
462 dev_err(info->dev, "failed to handle MUIC interrupt\n");
463
464 mutex_unlock(&info->mutex);
465}
466
467static irqreturn_t rt8973a_muic_irq_handler(int irq, void *data)
468{
469 struct rt8973a_muic_info *info = data;
470 int i, irq_type = -1;
471
472 for (i = 0; i < info->num_muic_irqs; i++)
473 if (irq == info->muic_irqs[i].virq)
474 irq_type = info->muic_irqs[i].irq;
475
476 switch (irq_type) {
477 case RT8973A_INT1_ATTACH:
478 info->irq_attach = true;
479 break;
480 case RT8973A_INT1_DETACH:
481 info->irq_detach = true;
482 break;
483 case RT8973A_INT1_OVP:
484 info->irq_ovp = true;
485 break;
486 case RT8973A_INT1_OTP:
487 info->irq_otp = true;
488 break;
489 case RT8973A_INT1_CHGDET:
490 case RT8973A_INT1_DCD_T:
491 case RT8973A_INT1_CONNECT:
492 case RT8973A_INT1_ADC_CHG:
493 case RT8973A_INT2_UVLO:
494 case RT8973A_INT2_POR:
495 case RT8973A_INT2_OTP_FET:
496 case RT8973A_INT2_OVP_FET:
497 case RT8973A_INT2_OCP_LATCH:
498 case RT8973A_INT2_OCP:
499 case RT8973A_INT2_OVP_OCP:
500 default:
501 dev_dbg(info->dev,
502 "Cannot handle this interrupt (%d)\n", irq_type);
503 break;
504 }
505
506 schedule_work(&info->irq_work);
507
508 return IRQ_HANDLED;
509}
510
511static void rt8973a_muic_detect_cable_wq(struct work_struct *work)
512{
513 struct rt8973a_muic_info *info = container_of(to_delayed_work(work),
514 struct rt8973a_muic_info, wq_detcable);
515 int ret;
516
517 /* Notify the state of connector cable or not */
518 ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_ATTACH);
519 if (ret < 0)
520 dev_warn(info->dev, "failed to detect cable state\n");
521}
522
523static void rt8973a_init_dev_type(struct rt8973a_muic_info *info)
524{
525 unsigned int data, vendor_id, version_id;
526 int i, ret;
527
528 /* To test I2C, Print version_id and vendor_id of RT8973A */
529 ret = regmap_read(info->regmap, RT8973A_REG_DEVICE_ID, &data);
530 if (ret) {
531 dev_err(info->dev,
532 "failed to read DEVICE_ID register: %d\n", ret);
533 return;
534 }
535
536 vendor_id = ((data & RT8973A_REG_DEVICE_ID_VENDOR_MASK) >>
537 RT8973A_REG_DEVICE_ID_VENDOR_SHIFT);
538 version_id = ((data & RT8973A_REG_DEVICE_ID_VERSION_MASK) >>
539 RT8973A_REG_DEVICE_ID_VERSION_SHIFT);
540
541 dev_info(info->dev, "Device type: version: 0x%x, vendor: 0x%x\n",
542 version_id, vendor_id);
543
544 /* Initiazle the register of RT8973A device to bring-up */
545 for (i = 0; i < info->num_reg_data; i++) {
546 u8 reg = info->reg_data[i].reg;
547 u8 mask = info->reg_data[i].mask;
548 u8 val = 0;
549
550 if (info->reg_data[i].invert)
551 val = ~info->reg_data[i].val;
552 else
553 val = info->reg_data[i].val;
554
555 regmap_update_bits(info->regmap, reg, mask, val);
556 }
557
558 /* Check whether RT8973A is auto swithcing mode or not */
559 ret = regmap_read(info->regmap, RT8973A_REG_CONTROL1, &data);
560 if (ret) {
561 dev_err(info->dev,
562 "failed to read CONTROL1 register: %d\n", ret);
563 return;
564 }
565
566 data &= RT8973A_REG_CONTROL1_AUTO_CONFIG_MASK;
567 if (data) {
568 info->auto_config = true;
569 dev_info(info->dev,
570 "Enable Auto-configuration for internal path\n");
571 }
572}
573
574static int rt8973a_muic_i2c_probe(struct i2c_client *i2c,
575 const struct i2c_device_id *id)
576{
577 struct device_node *np = i2c->dev.of_node;
578 struct rt8973a_muic_info *info;
579 int i, ret, irq_flags;
580
581 if (!np)
582 return -EINVAL;
583
584 info = devm_kzalloc(&i2c->dev, sizeof(*info), GFP_KERNEL);
585 if (!info) {
586 dev_err(&i2c->dev, "failed to allocate memory\n");
587 return -ENOMEM;
588 }
589 i2c_set_clientdata(i2c, info);
590
591 info->dev = &i2c->dev;
592 info->i2c = i2c;
593 info->irq = i2c->irq;
594 info->muic_irqs = rt8973a_muic_irqs;
595 info->num_muic_irqs = ARRAY_SIZE(rt8973a_muic_irqs);
596 info->reg_data = rt8973a_reg_data;
597 info->num_reg_data = ARRAY_SIZE(rt8973a_reg_data);
598
599 mutex_init(&info->mutex);
600
601 INIT_WORK(&info->irq_work, rt8973a_muic_irq_work);
602
603 info->regmap = devm_regmap_init_i2c(i2c, &rt8973a_muic_regmap_config);
604 if (IS_ERR(info->regmap)) {
605 ret = PTR_ERR(info->regmap);
606 dev_err(info->dev, "failed to allocate register map: %d\n",
607 ret);
608 return ret;
609 }
610
611 /* Support irq domain for RT8973A MUIC device */
612 irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED;
613 ret = regmap_add_irq_chip(info->regmap, info->irq, irq_flags, 0,
614 &rt8973a_muic_irq_chip, &info->irq_data);
615 if (ret != 0) {
616 dev_err(info->dev, "failed to add irq_chip (irq:%d, err:%d)\n",
617 info->irq, ret);
618 return ret;
619 }
620
621 for (i = 0; i < info->num_muic_irqs; i++) {
622 struct muic_irq *muic_irq = &info->muic_irqs[i];
623 unsigned int virq = 0;
624
625 virq = regmap_irq_get_virq(info->irq_data, muic_irq->irq);
626 if (virq <= 0)
627 return -EINVAL;
628 muic_irq->virq = virq;
629
630 ret = devm_request_threaded_irq(info->dev, virq, NULL,
631 rt8973a_muic_irq_handler,
632 IRQF_NO_SUSPEND,
633 muic_irq->name, info);
634 if (ret) {
635 dev_err(info->dev,
636 "failed: irq request (IRQ: %d, error :%d)\n",
637 muic_irq->irq, ret);
638 return ret;
639 }
640 }
641
642 /* Allocate extcon device */
643 info->edev = devm_extcon_dev_allocate(info->dev, rt8973a_extcon_cable);
644 if (IS_ERR(info->edev)) {
645 dev_err(info->dev, "failed to allocate memory for extcon\n");
646 return -ENOMEM;
647 }
648 info->edev->name = np->name;
649
650 /* Register extcon device */
651 ret = devm_extcon_dev_register(info->dev, info->edev);
652 if (ret) {
653 dev_err(info->dev, "failed to register extcon device\n");
654 return ret;
655 }
656
657 /*
658 * Detect accessory after completing the initialization of platform
659 *
660 * - Use delayed workqueue to detect cable state and then
661 * notify cable state to notifiee/platform through uevent.
662 * After completing the booting of platform, the extcon provider
663 * driver should notify cable state to upper layer.
664 */
665 INIT_DELAYED_WORK(&info->wq_detcable, rt8973a_muic_detect_cable_wq);
666 queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
667 msecs_to_jiffies(DELAY_MS_DEFAULT));
668
669 /* Initialize RT8973A device and print vendor id and version id */
670 rt8973a_init_dev_type(info);
671
672 return 0;
673}
674
675static int rt8973a_muic_i2c_remove(struct i2c_client *i2c)
676{
677 struct rt8973a_muic_info *info = i2c_get_clientdata(i2c);
678
679 regmap_del_irq_chip(info->irq, info->irq_data);
680
681 return 0;
682}
683
684static struct of_device_id rt8973a_dt_match[] = {
685 { .compatible = "richtek,rt8973a-muic" },
686 { },
687};
688
689#ifdef CONFIG_PM_SLEEP
690static int rt8973a_muic_suspend(struct device *dev)
691{
692 struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
693 struct rt8973a_muic_info *info = i2c_get_clientdata(i2c);
694
695 enable_irq_wake(info->irq);
696
697 return 0;
698}
699
700static int rt8973a_muic_resume(struct device *dev)
701{
702 struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
703 struct rt8973a_muic_info *info = i2c_get_clientdata(i2c);
704
705 disable_irq_wake(info->irq);
706
707 return 0;
708}
709#endif
710
711static SIMPLE_DEV_PM_OPS(rt8973a_muic_pm_ops,
712 rt8973a_muic_suspend, rt8973a_muic_resume);
713
714static const struct i2c_device_id rt8973a_i2c_id[] = {
715 { "rt8973a", TYPE_RT8973A },
716 { }
717};
718MODULE_DEVICE_TABLE(i2c, rt8973a_i2c_id);
719
720static struct i2c_driver rt8973a_muic_i2c_driver = {
721 .driver = {
722 .name = "rt8973a",
723 .owner = THIS_MODULE,
724 .pm = &rt8973a_muic_pm_ops,
725 .of_match_table = rt8973a_dt_match,
726 },
727 .probe = rt8973a_muic_i2c_probe,
728 .remove = rt8973a_muic_i2c_remove,
729 .id_table = rt8973a_i2c_id,
730};
731
732static int __init rt8973a_muic_i2c_init(void)
733{
734 return i2c_add_driver(&rt8973a_muic_i2c_driver);
735}
736subsys_initcall(rt8973a_muic_i2c_init);
737
738MODULE_DESCRIPTION("Richtek RT8973A Extcon driver");
739MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
740MODULE_LICENSE("GPL");
diff --git a/drivers/extcon/extcon-rt8973a.h b/drivers/extcon/extcon-rt8973a.h
new file mode 100644
index 000000000000..9dc3e0227eb7
--- /dev/null
+++ b/drivers/extcon/extcon-rt8973a.h
@@ -0,0 +1,203 @@
1/*
2 * rt8973a.h
3 *
4 * Copyright (c) 2014 Samsung Electronics Co., Ltd
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2 of the License, or (at your
9 * option) any later version.
10 */
11
12#ifndef __LINUX_EXTCON_RT8973A_H
13#define __LINUX_EXTCON_RT8973A_H
14
15enum rt8973a_types {
16 TYPE_RT8973A,
17};
18
19/* RT8973A registers */
20enum rt8973A_reg {
21 RT8973A_REG_DEVICE_ID = 0x1,
22 RT8973A_REG_CONTROL1,
23 RT8973A_REG_INT1,
24 RT8973A_REG_INT2,
25 RT8973A_REG_INTM1,
26 RT8973A_REG_INTM2,
27 RT8973A_REG_ADC,
28 RT8973A_REG_RSVD_1,
29 RT8973A_REG_RSVD_2,
30 RT8973A_REG_DEV1,
31 RT8973A_REG_DEV2,
32 RT8973A_REG_RSVD_3,
33 RT8973A_REG_RSVD_4,
34 RT8973A_REG_RSVD_5,
35 RT8973A_REG_RSVD_6,
36 RT8973A_REG_RSVD_7,
37 RT8973A_REG_RSVD_8,
38 RT8973A_REG_RSVD_9,
39 RT8973A_REG_MANUAL_SW1,
40 RT8973A_REG_MANUAL_SW2,
41 RT8973A_REG_RSVD_10,
42 RT8973A_REG_RSVD_11,
43 RT8973A_REG_RSVD_12,
44 RT8973A_REG_RSVD_13,
45 RT8973A_REG_RSVD_14,
46 RT8973A_REG_RSVD_15,
47 RT8973A_REG_RESET,
48
49 RT8973A_REG_END,
50};
51
52/* Define RT8973A MASK/SHIFT constant */
53#define RT8973A_REG_DEVICE_ID_VENDOR_SHIFT 0
54#define RT8973A_REG_DEVICE_ID_VERSION_SHIFT 3
55#define RT8973A_REG_DEVICE_ID_VENDOR_MASK (0x7 << RT8973A_REG_DEVICE_ID_VENDOR_SHIFT)
56#define RT8973A_REG_DEVICE_ID_VERSION_MASK (0x1f << RT8973A_REG_DEVICE_ID_VERSION_SHIFT)
57
58#define RT8973A_REG_CONTROL1_INTM_SHIFT 0
59#define RT8973A_REG_CONTROL1_AUTO_CONFIG_SHIFT 2
60#define RT8973A_REG_CONTROL1_I2C_RST_EN_SHIFT 3
61#define RT8973A_REG_CONTROL1_SWITCH_OPEN_SHIFT 4
62#define RT8973A_REG_CONTROL1_CHGTYP_SHIFT 5
63#define RT8973A_REG_CONTROL1_USB_CHD_EN_SHIFT 6
64#define RT8973A_REG_CONTROL1_ADC_EN_SHIFT 7
65#define RT8973A_REG_CONTROL1_INTM_MASK (0x1 << RT8973A_REG_CONTROL1_INTM_SHIFT)
66#define RT8973A_REG_CONTROL1_AUTO_CONFIG_MASK (0x1 << RT8973A_REG_CONTROL1_AUTO_CONFIG_SHIFT)
67#define RT8973A_REG_CONTROL1_I2C_RST_EN_MASK (0x1 << RT8973A_REG_CONTROL1_I2C_RST_EN_SHIFT)
68#define RT8973A_REG_CONTROL1_SWITCH_OPEN_MASK (0x1 << RT8973A_REG_CONTROL1_SWITCH_OPEN_SHIFT)
69#define RT8973A_REG_CONTROL1_CHGTYP_MASK (0x1 << RT8973A_REG_CONTROL1_CHGTYP_SHIFT)
70#define RT8973A_REG_CONTROL1_USB_CHD_EN_MASK (0x1 << RT8973A_REG_CONTROL1_USB_CHD_EN_SHIFT)
71#define RT8973A_REG_CONTROL1_ADC_EN_MASK (0x1 << RT8973A_REG_CONTROL1_ADC_EN_SHIFT)
72
73#define RT9873A_REG_INTM1_ATTACH_SHIFT 0
74#define RT9873A_REG_INTM1_DETACH_SHIFT 1
75#define RT9873A_REG_INTM1_CHGDET_SHIFT 2
76#define RT9873A_REG_INTM1_DCD_T_SHIFT 3
77#define RT9873A_REG_INTM1_OVP_SHIFT 4
78#define RT9873A_REG_INTM1_CONNECT_SHIFT 5
79#define RT9873A_REG_INTM1_ADC_CHG_SHIFT 6
80#define RT9873A_REG_INTM1_OTP_SHIFT 7
81#define RT9873A_REG_INTM1_ATTACH_MASK (0x1 << RT9873A_REG_INTM1_ATTACH_SHIFT)
82#define RT9873A_REG_INTM1_DETACH_MASK (0x1 << RT9873A_REG_INTM1_DETACH_SHIFT)
83#define RT9873A_REG_INTM1_CHGDET_MASK (0x1 << RT9873A_REG_INTM1_CHGDET_SHIFT)
84#define RT9873A_REG_INTM1_DCD_T_MASK (0x1 << RT9873A_REG_INTM1_DCD_T_SHIFT)
85#define RT9873A_REG_INTM1_OVP_MASK (0x1 << RT9873A_REG_INTM1_OVP_SHIFT)
86#define RT9873A_REG_INTM1_CONNECT_MASK (0x1 << RT9873A_REG_INTM1_CONNECT_SHIFT)
87#define RT9873A_REG_INTM1_ADC_CHG_MASK (0x1 << RT9873A_REG_INTM1_ADC_CHG_SHIFT)
88#define RT9873A_REG_INTM1_OTP_MASK (0x1 << RT9873A_REG_INTM1_OTP_SHIFT)
89
90#define RT9873A_REG_INTM2_UVLO_SHIFT 1
91#define RT9873A_REG_INTM2_POR_SHIFT 2
92#define RT9873A_REG_INTM2_OTP_FET_SHIFT 3
93#define RT9873A_REG_INTM2_OVP_FET_SHIFT 4
94#define RT9873A_REG_INTM2_OCP_LATCH_SHIFT 5
95#define RT9873A_REG_INTM2_OCP_SHIFT 6
96#define RT9873A_REG_INTM2_OVP_OCP_SHIFT 7
97#define RT9873A_REG_INTM2_UVLO_MASK (0x1 << RT9873A_REG_INTM2_UVLO_SHIFT)
98#define RT9873A_REG_INTM2_POR_MASK (0x1 << RT9873A_REG_INTM2_POR_SHIFT)
99#define RT9873A_REG_INTM2_OTP_FET_MASK (0x1 << RT9873A_REG_INTM2_OTP_FET_SHIFT)
100#define RT9873A_REG_INTM2_OVP_FET_MASK (0x1 << RT9873A_REG_INTM2_OVP_FET_SHIFT)
101#define RT9873A_REG_INTM2_OCP_LATCH_MASK (0x1 << RT9873A_REG_INTM2_OCP_LATCH_SHIFT)
102#define RT9873A_REG_INTM2_OCP_MASK (0x1 << RT9873A_REG_INTM2_OCP_SHIFT)
103#define RT9873A_REG_INTM2_OVP_OCP_MASK (0x1 << RT9873A_REG_INTM2_OVP_OCP_SHIFT)
104
105#define RT8973A_REG_ADC_SHIFT 0
106#define RT8973A_REG_ADC_MASK (0x1f << RT8973A_REG_ADC_SHIFT)
107
108#define RT8973A_REG_DEV1_OTG_SHIFT 0
109#define RT8973A_REG_DEV1_SDP_SHIFT 2
110#define RT8973A_REG_DEV1_UART_SHIFT 3
111#define RT8973A_REG_DEV1_CAR_KIT_TYPE1_SHIFT 4
112#define RT8973A_REG_DEV1_CDPORT_SHIFT 5
113#define RT8973A_REG_DEV1_DCPORT_SHIFT 6
114#define RT8973A_REG_DEV1_OTG_MASK (0x1 << RT8973A_REG_DEV1_OTG_SHIFT)
115#define RT8973A_REG_DEV1_SDP_MASK (0x1 << RT8973A_REG_DEV1_SDP_SHIFT)
116#define RT8973A_REG_DEV1_UART_MASK (0x1 << RT8973A_REG_DEV1_UART_SHIFT)
117#define RT8973A_REG_DEV1_CAR_KIT_TYPE1_MASK (0x1 << RT8973A_REG_DEV1_CAR_KIT_TYPE1_SHIFT)
118#define RT8973A_REG_DEV1_CDPORT_MASK (0x1 << RT8973A_REG_DEV1_CDPORT_SHIFT)
119#define RT8973A_REG_DEV1_DCPORT_MASK (0x1 << RT8973A_REG_DEV1_DCPORT_SHIFT)
120#define RT8973A_REG_DEV1_USB_MASK (RT8973A_REG_DEV1_SDP_MASK \
121 | RT8973A_REG_DEV1_CDPORT_MASK)
122
123#define RT8973A_REG_DEV2_JIG_USB_ON_SHIFT 0
124#define RT8973A_REG_DEV2_JIG_USB_OFF_SHIFT 1
125#define RT8973A_REG_DEV2_JIG_UART_ON_SHIFT 2
126#define RT8973A_REG_DEV2_JIG_UART_OFF_SHIFT 3
127#define RT8973A_REG_DEV2_JIG_USB_ON_MASK (0x1 << RT8973A_REG_DEV2_JIG_USB_ON_SHIFT)
128#define RT8973A_REG_DEV2_JIG_USB_OFF_MASK (0x1 << RT8973A_REG_DEV2_JIG_USB_OFF_SHIFT)
129#define RT8973A_REG_DEV2_JIG_UART_ON_MASK (0x1 << RT8973A_REG_DEV2_JIG_UART_ON_SHIFT)
130#define RT8973A_REG_DEV2_JIG_UART_OFF_MASK (0x1 << RT8973A_REG_DEV2_JIG_UART_OFF_SHIFT)
131
132#define RT8973A_REG_MANUAL_SW1_DP_SHIFT 2
133#define RT8973A_REG_MANUAL_SW1_DM_SHIFT 5
134#define RT8973A_REG_MANUAL_SW1_DP_MASK (0x7 << RT8973A_REG_MANUAL_SW1_DP_SHIFT)
135#define RT8973A_REG_MANUAL_SW1_DM_MASK (0x7 << RT8973A_REG_MANUAL_SW1_DM_SHIFT)
136#define DM_DP_CON_SWITCH_OPEN 0x0
137#define DM_DP_CON_SWITCH_USB 0x1
138#define DM_DP_CON_SWITCH_UART 0x3
139#define DM_DP_SWITCH_OPEN ((DM_DP_CON_SWITCH_OPEN << RT8973A_REG_MANUAL_SW1_DP_SHIFT) \
140 | (DM_DP_CON_SWITCH_OPEN << RT8973A_REG_MANUAL_SW1_DM_SHIFT))
141#define DM_DP_SWITCH_USB ((DM_DP_CON_SWITCH_USB << RT8973A_REG_MANUAL_SW1_DP_SHIFT) \
142 | (DM_DP_CON_SWITCH_USB << RT8973A_REG_MANUAL_SW1_DM_SHIFT))
143#define DM_DP_SWITCH_UART ((DM_DP_CON_SWITCH_UART << RT8973A_REG_MANUAL_SW1_DP_SHIFT) \
144 | (DM_DP_CON_SWITCH_UART << RT8973A_REG_MANUAL_SW1_DM_SHIFT))
145
146#define RT8973A_REG_MANUAL_SW2_FET_ON_SHIFT 0
147#define RT8973A_REG_MANUAL_SW2_JIG_ON_SHIFT 2
148#define RT8973A_REG_MANUAL_SW2_BOOT_SW_SHIFT 3
149#define RT8973A_REG_MANUAL_SW2_FET_ON_MASK (0x1 << RT8973A_REG_MANUAL_SW2_FET_ON_SHIFT)
150#define RT8973A_REG_MANUAL_SW2_JIG_ON_MASK (0x1 << RT8973A_REG_MANUAL_SW2_JIG_ON_SHIFT)
151#define RT8973A_REG_MANUAL_SW2_BOOT_SW_MASK (0x1 << RT8973A_REG_MANUAL_SW2_BOOT_SW_SHIFT)
152#define RT8973A_REG_MANUAL_SW2_FET_ON 0
153#define RT8973A_REG_MANUAL_SW2_FET_OFF 0x1
154#define RT8973A_REG_MANUAL_SW2_JIG_OFF 0
155#define RT8973A_REG_MANUAL_SW2_JIG_ON 0x1
156#define RT8973A_REG_MANUAL_SW2_BOOT_SW_ON 0
157#define RT8973A_REG_MANUAL_SW2_BOOT_SW_OFF 0x1
158
159#define RT8973A_REG_RESET_SHIFT 0
160#define RT8973A_REG_RESET_MASK (0x1 << RT8973A_REG_RESET_SHIFT)
161#define RT8973A_REG_RESET 0x1
162
163/* RT8973A Interrupts */
164enum rt8973a_irq {
165 /* Interrupt1*/
166 RT8973A_INT1_ATTACH,
167 RT8973A_INT1_DETACH,
168 RT8973A_INT1_CHGDET,
169 RT8973A_INT1_DCD_T,
170 RT8973A_INT1_OVP,
171 RT8973A_INT1_CONNECT,
172 RT8973A_INT1_ADC_CHG,
173 RT8973A_INT1_OTP,
174
175 /* Interrupt2*/
176 RT8973A_INT2_UVLO,
177 RT8973A_INT2_POR,
178 RT8973A_INT2_OTP_FET,
179 RT8973A_INT2_OVP_FET,
180 RT8973A_INT2_OCP_LATCH,
181 RT8973A_INT2_OCP,
182 RT8973A_INT2_OVP_OCP,
183
184 RT8973A_NUM,
185};
186
187#define RT8973A_INT1_ATTACH_MASK BIT(0)
188#define RT8973A_INT1_DETACH_MASK BIT(1)
189#define RT8973A_INT1_CHGDET_MASK BIT(2)
190#define RT8973A_INT1_DCD_T_MASK BIT(3)
191#define RT8973A_INT1_OVP_MASK BIT(4)
192#define RT8973A_INT1_CONNECT_MASK BIT(5)
193#define RT8973A_INT1_ADC_CHG_MASK BIT(6)
194#define RT8973A_INT1_OTP_MASK BIT(7)
195#define RT8973A_INT2_UVLOT_MASK BIT(0)
196#define RT8973A_INT2_POR_MASK BIT(1)
197#define RT8973A_INT2_OTP_FET_MASK BIT(2)
198#define RT8973A_INT2_OVP_FET_MASK BIT(3)
199#define RT8973A_INT2_OCP_LATCH_MASK BIT(4)
200#define RT8973A_INT2_OCP_MASK BIT(5)
201#define RT8973A_INT2_OVP_OCP_MASK BIT(6)
202
203#endif /* __LINUX_EXTCON_RT8973A_H */
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-31 16:27:07 -0500