Commit | Line | Data |
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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
c03e017c CC |
2 | /* |
3 | * extcon-rt8973a.c - Richtek RT8973A extcon driver to support USB switches | |
4 | * | |
5 | * Copyright (c) 2014 Samsung Electronics Co., Ltd | |
6 | * Author: Chanwoo Choi <cw00.choi@samsung.com> | |
c03e017c CC |
7 | */ |
8 | ||
9 | #include <linux/err.h> | |
10 | #include <linux/i2c.h> | |
11 | #include <linux/input.h> | |
12 | #include <linux/interrupt.h> | |
13 | #include <linux/irqdomain.h> | |
14 | #include <linux/kernel.h> | |
15 | #include <linux/module.h> | |
16 | #include <linux/platform_device.h> | |
17 | #include <linux/regmap.h> | |
18 | #include <linux/slab.h> | |
176aa360 | 19 | #include <linux/extcon-provider.h> |
c03e017c CC |
20 | |
21 | #include "extcon-rt8973a.h" | |
22 | ||
23 | #define DELAY_MS_DEFAULT 20000 /* unit: millisecond */ | |
24 | ||
25 | struct muic_irq { | |
26 | unsigned int irq; | |
27 | const char *name; | |
28 | unsigned int virq; | |
29 | }; | |
30 | ||
31 | struct reg_data { | |
32 | u8 reg; | |
33 | u8 mask; | |
34 | u8 val; | |
35 | bool invert; | |
36 | }; | |
37 | ||
38 | struct rt8973a_muic_info { | |
39 | struct device *dev; | |
40 | struct extcon_dev *edev; | |
41 | ||
42 | struct i2c_client *i2c; | |
43 | struct regmap *regmap; | |
44 | ||
45 | struct regmap_irq_chip_data *irq_data; | |
46 | struct muic_irq *muic_irqs; | |
47 | unsigned int num_muic_irqs; | |
48 | int irq; | |
49 | bool irq_attach; | |
50 | bool irq_detach; | |
51 | bool irq_ovp; | |
52 | bool irq_otp; | |
53 | struct work_struct irq_work; | |
54 | ||
55 | struct reg_data *reg_data; | |
56 | unsigned int num_reg_data; | |
57 | bool auto_config; | |
58 | ||
59 | struct mutex mutex; | |
60 | ||
61 | /* | |
62 | * Use delayed workqueue to detect cable state and then | |
63 | * notify cable state to notifiee/platform through uevent. | |
64 | * After completing the booting of platform, the extcon provider | |
65 | * driver should notify cable state to upper layer. | |
66 | */ | |
67 | struct delayed_work wq_detcable; | |
68 | }; | |
69 | ||
70 | /* Default value of RT8973A register to bring up MUIC device. */ | |
71 | static struct reg_data rt8973a_reg_data[] = { | |
72 | { | |
73 | .reg = RT8973A_REG_CONTROL1, | |
74 | .mask = RT8973A_REG_CONTROL1_ADC_EN_MASK | |
75 | | RT8973A_REG_CONTROL1_USB_CHD_EN_MASK | |
76 | | RT8973A_REG_CONTROL1_CHGTYP_MASK | |
77 | | RT8973A_REG_CONTROL1_SWITCH_OPEN_MASK | |
78 | | RT8973A_REG_CONTROL1_AUTO_CONFIG_MASK | |
79 | | RT8973A_REG_CONTROL1_INTM_MASK, | |
80 | .val = RT8973A_REG_CONTROL1_ADC_EN_MASK | |
81 | | RT8973A_REG_CONTROL1_USB_CHD_EN_MASK | |
82 | | RT8973A_REG_CONTROL1_CHGTYP_MASK, | |
83 | .invert = false, | |
84 | }, | |
85 | { /* sentinel */ } | |
86 | }; | |
87 | ||
88 | /* List of detectable cables */ | |
73b6ecdb | 89 | static const unsigned int rt8973a_extcon_cable[] = { |
2a9de9c0 CC |
90 | EXTCON_USB, |
91 | EXTCON_USB_HOST, | |
8b45b6a0 | 92 | EXTCON_CHG_USB_SDP, |
11eecf91 | 93 | EXTCON_CHG_USB_DCP, |
2a9de9c0 CC |
94 | EXTCON_JIG, |
95 | EXTCON_NONE, | |
c03e017c CC |
96 | }; |
97 | ||
98 | /* Define OVP (Over Voltage Protection), OTP (Over Temperature Protection) */ | |
99 | enum rt8973a_event_type { | |
100 | RT8973A_EVENT_ATTACH = 1, | |
101 | RT8973A_EVENT_DETACH, | |
102 | RT8973A_EVENT_OVP, | |
103 | RT8973A_EVENT_OTP, | |
104 | }; | |
105 | ||
106 | /* Define supported accessory type */ | |
107 | enum rt8973a_muic_acc_type { | |
108 | RT8973A_MUIC_ADC_OTG = 0x0, | |
109 | RT8973A_MUIC_ADC_AUDIO_SEND_END_BUTTON, | |
110 | RT8973A_MUIC_ADC_AUDIO_REMOTE_S1_BUTTON, | |
111 | RT8973A_MUIC_ADC_AUDIO_REMOTE_S2_BUTTON, | |
112 | RT8973A_MUIC_ADC_AUDIO_REMOTE_S3_BUTTON, | |
113 | RT8973A_MUIC_ADC_AUDIO_REMOTE_S4_BUTTON, | |
114 | RT8973A_MUIC_ADC_AUDIO_REMOTE_S5_BUTTON, | |
115 | RT8973A_MUIC_ADC_AUDIO_REMOTE_S6_BUTTON, | |
116 | RT8973A_MUIC_ADC_AUDIO_REMOTE_S7_BUTTON, | |
117 | RT8973A_MUIC_ADC_AUDIO_REMOTE_S8_BUTTON, | |
118 | RT8973A_MUIC_ADC_AUDIO_REMOTE_S9_BUTTON, | |
119 | RT8973A_MUIC_ADC_AUDIO_REMOTE_S10_BUTTON, | |
120 | RT8973A_MUIC_ADC_AUDIO_REMOTE_S11_BUTTON, | |
121 | RT8973A_MUIC_ADC_AUDIO_REMOTE_S12_BUTTON, | |
122 | RT8973A_MUIC_ADC_RESERVED_ACC_1, | |
123 | RT8973A_MUIC_ADC_RESERVED_ACC_2, | |
124 | RT8973A_MUIC_ADC_RESERVED_ACC_3, | |
125 | RT8973A_MUIC_ADC_RESERVED_ACC_4, | |
126 | RT8973A_MUIC_ADC_RESERVED_ACC_5, | |
127 | RT8973A_MUIC_ADC_AUDIO_TYPE2, | |
128 | RT8973A_MUIC_ADC_PHONE_POWERED_DEV, | |
129 | RT8973A_MUIC_ADC_UNKNOWN_ACC_1, | |
130 | RT8973A_MUIC_ADC_UNKNOWN_ACC_2, | |
131 | RT8973A_MUIC_ADC_TA, | |
132 | RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB, | |
133 | RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB, | |
134 | RT8973A_MUIC_ADC_UNKNOWN_ACC_3, | |
135 | RT8973A_MUIC_ADC_UNKNOWN_ACC_4, | |
136 | RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART, | |
137 | RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART, | |
138 | RT8973A_MUIC_ADC_UNKNOWN_ACC_5, | |
139 | RT8973A_MUIC_ADC_OPEN = 0x1f, | |
140 | ||
af57fa4d SR |
141 | /* |
142 | * The below accessories has same ADC value (0x1f). | |
143 | * So, Device type1 is used to separate specific accessory. | |
144 | */ | |
c03e017c CC |
145 | /* |---------|--ADC| */ |
146 | /* | [7:5]|[4:0]| */ | |
147 | RT8973A_MUIC_ADC_USB = 0x3f, /* | 001|11111| */ | |
148 | }; | |
149 | ||
150 | /* List of supported interrupt for RT8973A */ | |
151 | static struct muic_irq rt8973a_muic_irqs[] = { | |
152 | { RT8973A_INT1_ATTACH, "muic-attach" }, | |
153 | { RT8973A_INT1_DETACH, "muic-detach" }, | |
154 | { RT8973A_INT1_CHGDET, "muic-chgdet" }, | |
155 | { RT8973A_INT1_DCD_T, "muic-dcd-t" }, | |
156 | { RT8973A_INT1_OVP, "muic-ovp" }, | |
157 | { RT8973A_INT1_CONNECT, "muic-connect" }, | |
158 | { RT8973A_INT1_ADC_CHG, "muic-adc-chg" }, | |
159 | { RT8973A_INT1_OTP, "muic-otp" }, | |
160 | { RT8973A_INT2_UVLO, "muic-uvlo" }, | |
161 | { RT8973A_INT2_POR, "muic-por" }, | |
162 | { RT8973A_INT2_OTP_FET, "muic-otp-fet" }, | |
163 | { RT8973A_INT2_OVP_FET, "muic-ovp-fet" }, | |
164 | { RT8973A_INT2_OCP_LATCH, "muic-ocp-latch" }, | |
165 | { RT8973A_INT2_OCP, "muic-ocp" }, | |
166 | { RT8973A_INT2_OVP_OCP, "muic-ovp-ocp" }, | |
167 | }; | |
168 | ||
169 | /* Define interrupt list of RT8973A to register regmap_irq */ | |
170 | static const struct regmap_irq rt8973a_irqs[] = { | |
171 | /* INT1 interrupts */ | |
172 | { .reg_offset = 0, .mask = RT8973A_INT1_ATTACH_MASK, }, | |
173 | { .reg_offset = 0, .mask = RT8973A_INT1_DETACH_MASK, }, | |
174 | { .reg_offset = 0, .mask = RT8973A_INT1_CHGDET_MASK, }, | |
175 | { .reg_offset = 0, .mask = RT8973A_INT1_DCD_T_MASK, }, | |
176 | { .reg_offset = 0, .mask = RT8973A_INT1_OVP_MASK, }, | |
177 | { .reg_offset = 0, .mask = RT8973A_INT1_CONNECT_MASK, }, | |
178 | { .reg_offset = 0, .mask = RT8973A_INT1_ADC_CHG_MASK, }, | |
179 | { .reg_offset = 0, .mask = RT8973A_INT1_OTP_MASK, }, | |
180 | ||
181 | /* INT2 interrupts */ | |
182 | { .reg_offset = 1, .mask = RT8973A_INT2_UVLOT_MASK,}, | |
183 | { .reg_offset = 1, .mask = RT8973A_INT2_POR_MASK, }, | |
184 | { .reg_offset = 1, .mask = RT8973A_INT2_OTP_FET_MASK, }, | |
185 | { .reg_offset = 1, .mask = RT8973A_INT2_OVP_FET_MASK, }, | |
186 | { .reg_offset = 1, .mask = RT8973A_INT2_OCP_LATCH_MASK, }, | |
187 | { .reg_offset = 1, .mask = RT8973A_INT2_OCP_MASK, }, | |
188 | { .reg_offset = 1, .mask = RT8973A_INT2_OVP_OCP_MASK, }, | |
189 | }; | |
190 | ||
191 | static const struct regmap_irq_chip rt8973a_muic_irq_chip = { | |
192 | .name = "rt8973a", | |
193 | .status_base = RT8973A_REG_INT1, | |
194 | .mask_base = RT8973A_REG_INTM1, | |
195 | .mask_invert = false, | |
196 | .num_regs = 2, | |
197 | .irqs = rt8973a_irqs, | |
198 | .num_irqs = ARRAY_SIZE(rt8973a_irqs), | |
199 | }; | |
200 | ||
201 | /* Define regmap configuration of RT8973A for I2C communication */ | |
202 | static bool rt8973a_muic_volatile_reg(struct device *dev, unsigned int reg) | |
203 | { | |
204 | switch (reg) { | |
205 | case RT8973A_REG_INTM1: | |
206 | case RT8973A_REG_INTM2: | |
207 | return true; | |
208 | default: | |
209 | break; | |
210 | } | |
211 | return false; | |
212 | } | |
213 | ||
214 | static const struct regmap_config rt8973a_muic_regmap_config = { | |
215 | .reg_bits = 8, | |
216 | .val_bits = 8, | |
217 | .volatile_reg = rt8973a_muic_volatile_reg, | |
218 | .max_register = RT8973A_REG_END, | |
219 | }; | |
220 | ||
221 | /* Change DM_CON/DP_CON/VBUSIN switch according to cable type */ | |
222 | static int rt8973a_muic_set_path(struct rt8973a_muic_info *info, | |
223 | unsigned int con_sw, bool attached) | |
224 | { | |
225 | int ret; | |
226 | ||
227 | /* | |
228 | * Don't need to set h/w path according to cable type | |
229 | * if Auto-configuration mode of CONTROL1 register is true. | |
230 | */ | |
231 | if (info->auto_config) | |
232 | return 0; | |
233 | ||
234 | if (!attached) | |
235 | con_sw = DM_DP_SWITCH_UART; | |
236 | ||
237 | switch (con_sw) { | |
238 | case DM_DP_SWITCH_OPEN: | |
239 | case DM_DP_SWITCH_USB: | |
240 | case DM_DP_SWITCH_UART: | |
241 | ret = regmap_update_bits(info->regmap, RT8973A_REG_MANUAL_SW1, | |
242 | RT8973A_REG_MANUAL_SW1_DP_MASK | | |
243 | RT8973A_REG_MANUAL_SW1_DM_MASK, | |
244 | con_sw); | |
245 | if (ret < 0) { | |
246 | dev_err(info->dev, | |
247 | "cannot update DM_CON/DP_CON switch\n"); | |
248 | return ret; | |
249 | } | |
250 | break; | |
251 | default: | |
252 | dev_err(info->dev, "Unknown DM_CON/DP_CON switch type (%d)\n", | |
253 | con_sw); | |
254 | return -EINVAL; | |
255 | } | |
256 | ||
257 | return 0; | |
258 | } | |
259 | ||
260 | static int rt8973a_muic_get_cable_type(struct rt8973a_muic_info *info) | |
261 | { | |
262 | unsigned int adc, dev1; | |
263 | int ret, cable_type; | |
264 | ||
265 | /* Read ADC value according to external cable or button */ | |
266 | ret = regmap_read(info->regmap, RT8973A_REG_ADC, &adc); | |
267 | if (ret) { | |
268 | dev_err(info->dev, "failed to read ADC register\n"); | |
269 | return ret; | |
270 | } | |
271 | cable_type = adc & RT8973A_REG_ADC_MASK; | |
272 | ||
273 | /* Read Device 1 reigster to identify correct cable type */ | |
274 | ret = regmap_read(info->regmap, RT8973A_REG_DEV1, &dev1); | |
275 | if (ret) { | |
276 | dev_err(info->dev, "failed to read DEV1 register\n"); | |
277 | return ret; | |
278 | } | |
279 | ||
280 | switch (adc) { | |
281 | case RT8973A_MUIC_ADC_OPEN: | |
282 | if (dev1 & RT8973A_REG_DEV1_USB_MASK) | |
283 | cable_type = RT8973A_MUIC_ADC_USB; | |
284 | else if (dev1 & RT8973A_REG_DEV1_DCPORT_MASK) | |
285 | cable_type = RT8973A_MUIC_ADC_TA; | |
286 | else | |
287 | cable_type = RT8973A_MUIC_ADC_OPEN; | |
288 | break; | |
289 | default: | |
290 | break; | |
291 | } | |
292 | ||
293 | return cable_type; | |
294 | } | |
295 | ||
296 | static int rt8973a_muic_cable_handler(struct rt8973a_muic_info *info, | |
297 | enum rt8973a_event_type event) | |
298 | { | |
299 | static unsigned int prev_cable_type; | |
c03e017c | 300 | unsigned int con_sw = DM_DP_SWITCH_UART; |
2a9de9c0 | 301 | int ret, cable_type; |
73b6ecdb | 302 | unsigned int id; |
c03e017c CC |
303 | bool attached = false; |
304 | ||
c03e017c CC |
305 | switch (event) { |
306 | case RT8973A_EVENT_ATTACH: | |
307 | cable_type = rt8973a_muic_get_cable_type(info); | |
308 | attached = true; | |
309 | break; | |
310 | case RT8973A_EVENT_DETACH: | |
311 | cable_type = prev_cable_type; | |
312 | attached = false; | |
313 | break; | |
314 | case RT8973A_EVENT_OVP: | |
315 | case RT8973A_EVENT_OTP: | |
316 | dev_warn(info->dev, | |
317 | "happen Over %s issue. Need to disconnect all cables\n", | |
318 | event == RT8973A_EVENT_OVP ? "Voltage" : "Temperature"); | |
319 | cable_type = prev_cable_type; | |
320 | attached = false; | |
321 | break; | |
322 | default: | |
323 | dev_err(info->dev, | |
324 | "Cannot handle this event (event:%d)\n", event); | |
325 | return -EINVAL; | |
326 | } | |
327 | prev_cable_type = cable_type; | |
328 | ||
329 | switch (cable_type) { | |
330 | case RT8973A_MUIC_ADC_OTG: | |
2a9de9c0 | 331 | id = EXTCON_USB_HOST; |
c03e017c CC |
332 | con_sw = DM_DP_SWITCH_USB; |
333 | break; | |
334 | case RT8973A_MUIC_ADC_TA: | |
11eecf91 | 335 | id = EXTCON_CHG_USB_DCP; |
c03e017c CC |
336 | con_sw = DM_DP_SWITCH_OPEN; |
337 | break; | |
338 | case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB: | |
c03e017c | 339 | case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB: |
2a9de9c0 | 340 | id = EXTCON_JIG; |
41b3c015 | 341 | con_sw = DM_DP_SWITCH_USB; |
c03e017c CC |
342 | break; |
343 | case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART: | |
c03e017c | 344 | case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART: |
2a9de9c0 | 345 | id = EXTCON_JIG; |
c03e017c CC |
346 | con_sw = DM_DP_SWITCH_UART; |
347 | break; | |
348 | case RT8973A_MUIC_ADC_USB: | |
2a9de9c0 | 349 | id = EXTCON_USB; |
c03e017c CC |
350 | con_sw = DM_DP_SWITCH_USB; |
351 | break; | |
352 | case RT8973A_MUIC_ADC_OPEN: | |
353 | return 0; | |
354 | case RT8973A_MUIC_ADC_UNKNOWN_ACC_1: | |
355 | case RT8973A_MUIC_ADC_UNKNOWN_ACC_2: | |
356 | case RT8973A_MUIC_ADC_UNKNOWN_ACC_3: | |
357 | case RT8973A_MUIC_ADC_UNKNOWN_ACC_4: | |
358 | case RT8973A_MUIC_ADC_UNKNOWN_ACC_5: | |
359 | dev_warn(info->dev, | |
360 | "Unknown accessory type (adc:0x%x)\n", cable_type); | |
361 | return 0; | |
362 | case RT8973A_MUIC_ADC_AUDIO_SEND_END_BUTTON: | |
363 | case RT8973A_MUIC_ADC_AUDIO_REMOTE_S1_BUTTON: | |
364 | case RT8973A_MUIC_ADC_AUDIO_REMOTE_S2_BUTTON: | |
365 | case RT8973A_MUIC_ADC_AUDIO_REMOTE_S3_BUTTON: | |
366 | case RT8973A_MUIC_ADC_AUDIO_REMOTE_S4_BUTTON: | |
367 | case RT8973A_MUIC_ADC_AUDIO_REMOTE_S5_BUTTON: | |
368 | case RT8973A_MUIC_ADC_AUDIO_REMOTE_S6_BUTTON: | |
369 | case RT8973A_MUIC_ADC_AUDIO_REMOTE_S7_BUTTON: | |
370 | case RT8973A_MUIC_ADC_AUDIO_REMOTE_S8_BUTTON: | |
371 | case RT8973A_MUIC_ADC_AUDIO_REMOTE_S9_BUTTON: | |
372 | case RT8973A_MUIC_ADC_AUDIO_REMOTE_S10_BUTTON: | |
373 | case RT8973A_MUIC_ADC_AUDIO_REMOTE_S11_BUTTON: | |
374 | case RT8973A_MUIC_ADC_AUDIO_REMOTE_S12_BUTTON: | |
375 | case RT8973A_MUIC_ADC_AUDIO_TYPE2: | |
376 | dev_warn(info->dev, | |
377 | "Audio device/button type (adc:0x%x)\n", cable_type); | |
378 | return 0; | |
379 | case RT8973A_MUIC_ADC_RESERVED_ACC_1: | |
380 | case RT8973A_MUIC_ADC_RESERVED_ACC_2: | |
381 | case RT8973A_MUIC_ADC_RESERVED_ACC_3: | |
382 | case RT8973A_MUIC_ADC_RESERVED_ACC_4: | |
383 | case RT8973A_MUIC_ADC_RESERVED_ACC_5: | |
384 | case RT8973A_MUIC_ADC_PHONE_POWERED_DEV: | |
385 | return 0; | |
386 | default: | |
387 | dev_err(info->dev, | |
388 | "Cannot handle this cable_type (adc:0x%x)\n", | |
389 | cable_type); | |
390 | return -EINVAL; | |
391 | } | |
392 | ||
393 | /* Change internal hardware path(DM_CON/DP_CON) */ | |
394 | ret = rt8973a_muic_set_path(info, con_sw, attached); | |
395 | if (ret < 0) | |
396 | return ret; | |
397 | ||
398 | /* Change the state of external accessory */ | |
8670b459 | 399 | extcon_set_state_sync(info->edev, id, attached); |
8b45b6a0 | 400 | if (id == EXTCON_USB) |
8670b459 | 401 | extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP, |
8b45b6a0 | 402 | attached); |
c03e017c CC |
403 | |
404 | return 0; | |
405 | } | |
406 | ||
407 | static void rt8973a_muic_irq_work(struct work_struct *work) | |
408 | { | |
409 | struct rt8973a_muic_info *info = container_of(work, | |
410 | struct rt8973a_muic_info, irq_work); | |
411 | int ret = 0; | |
412 | ||
413 | if (!info->edev) | |
414 | return; | |
415 | ||
416 | mutex_lock(&info->mutex); | |
417 | ||
418 | /* Detect attached or detached cables */ | |
419 | if (info->irq_attach) { | |
420 | ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_ATTACH); | |
421 | info->irq_attach = false; | |
422 | } | |
423 | ||
424 | if (info->irq_detach) { | |
425 | ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_DETACH); | |
426 | info->irq_detach = false; | |
427 | } | |
428 | ||
429 | if (info->irq_ovp) { | |
430 | ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_OVP); | |
431 | info->irq_ovp = false; | |
432 | } | |
433 | ||
434 | if (info->irq_otp) { | |
435 | ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_OTP); | |
436 | info->irq_otp = false; | |
437 | } | |
438 | ||
439 | if (ret < 0) | |
440 | dev_err(info->dev, "failed to handle MUIC interrupt\n"); | |
441 | ||
442 | mutex_unlock(&info->mutex); | |
443 | } | |
444 | ||
445 | static irqreturn_t rt8973a_muic_irq_handler(int irq, void *data) | |
446 | { | |
447 | struct rt8973a_muic_info *info = data; | |
448 | int i, irq_type = -1; | |
449 | ||
450 | for (i = 0; i < info->num_muic_irqs; i++) | |
451 | if (irq == info->muic_irqs[i].virq) | |
452 | irq_type = info->muic_irqs[i].irq; | |
453 | ||
454 | switch (irq_type) { | |
455 | case RT8973A_INT1_ATTACH: | |
456 | info->irq_attach = true; | |
457 | break; | |
458 | case RT8973A_INT1_DETACH: | |
459 | info->irq_detach = true; | |
460 | break; | |
461 | case RT8973A_INT1_OVP: | |
462 | info->irq_ovp = true; | |
463 | break; | |
464 | case RT8973A_INT1_OTP: | |
465 | info->irq_otp = true; | |
466 | break; | |
467 | case RT8973A_INT1_CHGDET: | |
468 | case RT8973A_INT1_DCD_T: | |
469 | case RT8973A_INT1_CONNECT: | |
470 | case RT8973A_INT1_ADC_CHG: | |
471 | case RT8973A_INT2_UVLO: | |
472 | case RT8973A_INT2_POR: | |
473 | case RT8973A_INT2_OTP_FET: | |
474 | case RT8973A_INT2_OVP_FET: | |
475 | case RT8973A_INT2_OCP_LATCH: | |
476 | case RT8973A_INT2_OCP: | |
477 | case RT8973A_INT2_OVP_OCP: | |
478 | default: | |
479 | dev_dbg(info->dev, | |
480 | "Cannot handle this interrupt (%d)\n", irq_type); | |
481 | break; | |
482 | } | |
483 | ||
484 | schedule_work(&info->irq_work); | |
485 | ||
486 | return IRQ_HANDLED; | |
487 | } | |
488 | ||
489 | static void rt8973a_muic_detect_cable_wq(struct work_struct *work) | |
490 | { | |
491 | struct rt8973a_muic_info *info = container_of(to_delayed_work(work), | |
492 | struct rt8973a_muic_info, wq_detcable); | |
493 | int ret; | |
494 | ||
495 | /* Notify the state of connector cable or not */ | |
496 | ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_ATTACH); | |
497 | if (ret < 0) | |
498 | dev_warn(info->dev, "failed to detect cable state\n"); | |
499 | } | |
500 | ||
501 | static void rt8973a_init_dev_type(struct rt8973a_muic_info *info) | |
502 | { | |
503 | unsigned int data, vendor_id, version_id; | |
504 | int i, ret; | |
505 | ||
506 | /* To test I2C, Print version_id and vendor_id of RT8973A */ | |
507 | ret = regmap_read(info->regmap, RT8973A_REG_DEVICE_ID, &data); | |
508 | if (ret) { | |
509 | dev_err(info->dev, | |
510 | "failed to read DEVICE_ID register: %d\n", ret); | |
511 | return; | |
512 | } | |
513 | ||
514 | vendor_id = ((data & RT8973A_REG_DEVICE_ID_VENDOR_MASK) >> | |
515 | RT8973A_REG_DEVICE_ID_VENDOR_SHIFT); | |
516 | version_id = ((data & RT8973A_REG_DEVICE_ID_VERSION_MASK) >> | |
517 | RT8973A_REG_DEVICE_ID_VERSION_SHIFT); | |
518 | ||
519 | dev_info(info->dev, "Device type: version: 0x%x, vendor: 0x%x\n", | |
520 | version_id, vendor_id); | |
521 | ||
522 | /* Initiazle the register of RT8973A device to bring-up */ | |
523 | for (i = 0; i < info->num_reg_data; i++) { | |
524 | u8 reg = info->reg_data[i].reg; | |
525 | u8 mask = info->reg_data[i].mask; | |
526 | u8 val = 0; | |
527 | ||
528 | if (info->reg_data[i].invert) | |
529 | val = ~info->reg_data[i].val; | |
530 | else | |
531 | val = info->reg_data[i].val; | |
532 | ||
533 | regmap_update_bits(info->regmap, reg, mask, val); | |
534 | } | |
535 | ||
c6efb58d | 536 | /* Check whether RT8973A is auto switching mode or not */ |
c03e017c CC |
537 | ret = regmap_read(info->regmap, RT8973A_REG_CONTROL1, &data); |
538 | if (ret) { | |
539 | dev_err(info->dev, | |
540 | "failed to read CONTROL1 register: %d\n", ret); | |
541 | return; | |
542 | } | |
543 | ||
544 | data &= RT8973A_REG_CONTROL1_AUTO_CONFIG_MASK; | |
545 | if (data) { | |
546 | info->auto_config = true; | |
547 | dev_info(info->dev, | |
548 | "Enable Auto-configuration for internal path\n"); | |
549 | } | |
550 | } | |
551 | ||
552 | static int rt8973a_muic_i2c_probe(struct i2c_client *i2c, | |
553 | const struct i2c_device_id *id) | |
554 | { | |
555 | struct device_node *np = i2c->dev.of_node; | |
556 | struct rt8973a_muic_info *info; | |
557 | int i, ret, irq_flags; | |
558 | ||
559 | if (!np) | |
560 | return -EINVAL; | |
561 | ||
562 | info = devm_kzalloc(&i2c->dev, sizeof(*info), GFP_KERNEL); | |
34825e51 | 563 | if (!info) |
c03e017c | 564 | return -ENOMEM; |
c03e017c CC |
565 | i2c_set_clientdata(i2c, info); |
566 | ||
567 | info->dev = &i2c->dev; | |
568 | info->i2c = i2c; | |
569 | info->irq = i2c->irq; | |
570 | info->muic_irqs = rt8973a_muic_irqs; | |
571 | info->num_muic_irqs = ARRAY_SIZE(rt8973a_muic_irqs); | |
572 | info->reg_data = rt8973a_reg_data; | |
573 | info->num_reg_data = ARRAY_SIZE(rt8973a_reg_data); | |
574 | ||
575 | mutex_init(&info->mutex); | |
576 | ||
577 | INIT_WORK(&info->irq_work, rt8973a_muic_irq_work); | |
578 | ||
579 | info->regmap = devm_regmap_init_i2c(i2c, &rt8973a_muic_regmap_config); | |
580 | if (IS_ERR(info->regmap)) { | |
581 | ret = PTR_ERR(info->regmap); | |
582 | dev_err(info->dev, "failed to allocate register map: %d\n", | |
583 | ret); | |
584 | return ret; | |
585 | } | |
586 | ||
587 | /* Support irq domain for RT8973A MUIC device */ | |
588 | irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED; | |
589 | ret = regmap_add_irq_chip(info->regmap, info->irq, irq_flags, 0, | |
590 | &rt8973a_muic_irq_chip, &info->irq_data); | |
591 | if (ret != 0) { | |
592 | dev_err(info->dev, "failed to add irq_chip (irq:%d, err:%d)\n", | |
593 | info->irq, ret); | |
594 | return ret; | |
595 | } | |
596 | ||
597 | for (i = 0; i < info->num_muic_irqs; i++) { | |
598 | struct muic_irq *muic_irq = &info->muic_irqs[i]; | |
238ffc2e | 599 | int virq = 0; |
c03e017c CC |
600 | |
601 | virq = regmap_irq_get_virq(info->irq_data, muic_irq->irq); | |
602 | if (virq <= 0) | |
603 | return -EINVAL; | |
604 | muic_irq->virq = virq; | |
605 | ||
606 | ret = devm_request_threaded_irq(info->dev, virq, NULL, | |
607 | rt8973a_muic_irq_handler, | |
5f01e6bc | 608 | IRQF_NO_SUSPEND | IRQF_ONESHOT, |
c03e017c CC |
609 | muic_irq->name, info); |
610 | if (ret) { | |
611 | dev_err(info->dev, | |
612 | "failed: irq request (IRQ: %d, error :%d)\n", | |
613 | muic_irq->irq, ret); | |
614 | return ret; | |
615 | } | |
616 | } | |
617 | ||
618 | /* Allocate extcon device */ | |
619 | info->edev = devm_extcon_dev_allocate(info->dev, rt8973a_extcon_cable); | |
620 | if (IS_ERR(info->edev)) { | |
621 | dev_err(info->dev, "failed to allocate memory for extcon\n"); | |
622 | return -ENOMEM; | |
623 | } | |
c03e017c CC |
624 | |
625 | /* Register extcon device */ | |
626 | ret = devm_extcon_dev_register(info->dev, info->edev); | |
627 | if (ret) { | |
628 | dev_err(info->dev, "failed to register extcon device\n"); | |
629 | return ret; | |
630 | } | |
631 | ||
632 | /* | |
633 | * Detect accessory after completing the initialization of platform | |
634 | * | |
635 | * - Use delayed workqueue to detect cable state and then | |
636 | * notify cable state to notifiee/platform through uevent. | |
637 | * After completing the booting of platform, the extcon provider | |
638 | * driver should notify cable state to upper layer. | |
639 | */ | |
640 | INIT_DELAYED_WORK(&info->wq_detcable, rt8973a_muic_detect_cable_wq); | |
641 | queue_delayed_work(system_power_efficient_wq, &info->wq_detcable, | |
642 | msecs_to_jiffies(DELAY_MS_DEFAULT)); | |
643 | ||
644 | /* Initialize RT8973A device and print vendor id and version id */ | |
645 | rt8973a_init_dev_type(info); | |
646 | ||
647 | return 0; | |
648 | } | |
649 | ||
650 | static int rt8973a_muic_i2c_remove(struct i2c_client *i2c) | |
651 | { | |
652 | struct rt8973a_muic_info *info = i2c_get_clientdata(i2c); | |
653 | ||
654 | regmap_del_irq_chip(info->irq, info->irq_data); | |
655 | ||
656 | return 0; | |
657 | } | |
658 | ||
34825e51 | 659 | static const struct of_device_id rt8973a_dt_match[] = { |
c03e017c CC |
660 | { .compatible = "richtek,rt8973a-muic" }, |
661 | { }, | |
662 | }; | |
ff612f91 | 663 | MODULE_DEVICE_TABLE(of, rt8973a_dt_match); |
c03e017c CC |
664 | |
665 | #ifdef CONFIG_PM_SLEEP | |
666 | static int rt8973a_muic_suspend(struct device *dev) | |
667 | { | |
d5859342 | 668 | struct i2c_client *i2c = to_i2c_client(dev); |
c03e017c CC |
669 | struct rt8973a_muic_info *info = i2c_get_clientdata(i2c); |
670 | ||
671 | enable_irq_wake(info->irq); | |
672 | ||
673 | return 0; | |
674 | } | |
675 | ||
676 | static int rt8973a_muic_resume(struct device *dev) | |
677 | { | |
d5859342 | 678 | struct i2c_client *i2c = to_i2c_client(dev); |
c03e017c CC |
679 | struct rt8973a_muic_info *info = i2c_get_clientdata(i2c); |
680 | ||
681 | disable_irq_wake(info->irq); | |
682 | ||
683 | return 0; | |
684 | } | |
685 | #endif | |
686 | ||
687 | static SIMPLE_DEV_PM_OPS(rt8973a_muic_pm_ops, | |
688 | rt8973a_muic_suspend, rt8973a_muic_resume); | |
689 | ||
690 | static const struct i2c_device_id rt8973a_i2c_id[] = { | |
691 | { "rt8973a", TYPE_RT8973A }, | |
692 | { } | |
693 | }; | |
694 | MODULE_DEVICE_TABLE(i2c, rt8973a_i2c_id); | |
695 | ||
696 | static struct i2c_driver rt8973a_muic_i2c_driver = { | |
697 | .driver = { | |
698 | .name = "rt8973a", | |
c03e017c CC |
699 | .pm = &rt8973a_muic_pm_ops, |
700 | .of_match_table = rt8973a_dt_match, | |
701 | }, | |
702 | .probe = rt8973a_muic_i2c_probe, | |
703 | .remove = rt8973a_muic_i2c_remove, | |
704 | .id_table = rt8973a_i2c_id, | |
705 | }; | |
706 | ||
707 | static int __init rt8973a_muic_i2c_init(void) | |
708 | { | |
709 | return i2c_add_driver(&rt8973a_muic_i2c_driver); | |
710 | } | |
711 | subsys_initcall(rt8973a_muic_i2c_init); | |
712 | ||
713 | MODULE_DESCRIPTION("Richtek RT8973A Extcon driver"); | |
714 | MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>"); | |
715 | MODULE_LICENSE("GPL"); |