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, | |
c03e017c CC |
195 | .num_regs = 2, |
196 | .irqs = rt8973a_irqs, | |
197 | .num_irqs = ARRAY_SIZE(rt8973a_irqs), | |
198 | }; | |
199 | ||
200 | /* Define regmap configuration of RT8973A for I2C communication */ | |
201 | static bool rt8973a_muic_volatile_reg(struct device *dev, unsigned int reg) | |
202 | { | |
203 | switch (reg) { | |
204 | case RT8973A_REG_INTM1: | |
205 | case RT8973A_REG_INTM2: | |
206 | return true; | |
207 | default: | |
208 | break; | |
209 | } | |
210 | return false; | |
211 | } | |
212 | ||
213 | static const struct regmap_config rt8973a_muic_regmap_config = { | |
214 | .reg_bits = 8, | |
215 | .val_bits = 8, | |
216 | .volatile_reg = rt8973a_muic_volatile_reg, | |
217 | .max_register = RT8973A_REG_END, | |
218 | }; | |
219 | ||
220 | /* Change DM_CON/DP_CON/VBUSIN switch according to cable type */ | |
221 | static int rt8973a_muic_set_path(struct rt8973a_muic_info *info, | |
222 | unsigned int con_sw, bool attached) | |
223 | { | |
224 | int ret; | |
225 | ||
226 | /* | |
227 | * Don't need to set h/w path according to cable type | |
228 | * if Auto-configuration mode of CONTROL1 register is true. | |
229 | */ | |
230 | if (info->auto_config) | |
231 | return 0; | |
232 | ||
233 | if (!attached) | |
234 | con_sw = DM_DP_SWITCH_UART; | |
235 | ||
236 | switch (con_sw) { | |
237 | case DM_DP_SWITCH_OPEN: | |
238 | case DM_DP_SWITCH_USB: | |
239 | case DM_DP_SWITCH_UART: | |
240 | ret = regmap_update_bits(info->regmap, RT8973A_REG_MANUAL_SW1, | |
241 | RT8973A_REG_MANUAL_SW1_DP_MASK | | |
242 | RT8973A_REG_MANUAL_SW1_DM_MASK, | |
243 | con_sw); | |
244 | if (ret < 0) { | |
245 | dev_err(info->dev, | |
246 | "cannot update DM_CON/DP_CON switch\n"); | |
247 | return ret; | |
248 | } | |
249 | break; | |
250 | default: | |
251 | dev_err(info->dev, "Unknown DM_CON/DP_CON switch type (%d)\n", | |
252 | con_sw); | |
253 | return -EINVAL; | |
254 | } | |
255 | ||
256 | return 0; | |
257 | } | |
258 | ||
259 | static int rt8973a_muic_get_cable_type(struct rt8973a_muic_info *info) | |
260 | { | |
261 | unsigned int adc, dev1; | |
262 | int ret, cable_type; | |
263 | ||
264 | /* Read ADC value according to external cable or button */ | |
265 | ret = regmap_read(info->regmap, RT8973A_REG_ADC, &adc); | |
266 | if (ret) { | |
267 | dev_err(info->dev, "failed to read ADC register\n"); | |
268 | return ret; | |
269 | } | |
270 | cable_type = adc & RT8973A_REG_ADC_MASK; | |
271 | ||
272 | /* Read Device 1 reigster to identify correct cable type */ | |
273 | ret = regmap_read(info->regmap, RT8973A_REG_DEV1, &dev1); | |
274 | if (ret) { | |
275 | dev_err(info->dev, "failed to read DEV1 register\n"); | |
276 | return ret; | |
277 | } | |
278 | ||
279 | switch (adc) { | |
280 | case RT8973A_MUIC_ADC_OPEN: | |
281 | if (dev1 & RT8973A_REG_DEV1_USB_MASK) | |
282 | cable_type = RT8973A_MUIC_ADC_USB; | |
283 | else if (dev1 & RT8973A_REG_DEV1_DCPORT_MASK) | |
284 | cable_type = RT8973A_MUIC_ADC_TA; | |
285 | else | |
286 | cable_type = RT8973A_MUIC_ADC_OPEN; | |
287 | break; | |
288 | default: | |
289 | break; | |
290 | } | |
291 | ||
292 | return cable_type; | |
293 | } | |
294 | ||
295 | static int rt8973a_muic_cable_handler(struct rt8973a_muic_info *info, | |
296 | enum rt8973a_event_type event) | |
297 | { | |
298 | static unsigned int prev_cable_type; | |
c03e017c | 299 | unsigned int con_sw = DM_DP_SWITCH_UART; |
2a9de9c0 | 300 | int ret, cable_type; |
73b6ecdb | 301 | unsigned int id; |
c03e017c CC |
302 | bool attached = false; |
303 | ||
c03e017c CC |
304 | switch (event) { |
305 | case RT8973A_EVENT_ATTACH: | |
306 | cable_type = rt8973a_muic_get_cable_type(info); | |
307 | attached = true; | |
308 | break; | |
309 | case RT8973A_EVENT_DETACH: | |
310 | cable_type = prev_cable_type; | |
311 | attached = false; | |
312 | break; | |
313 | case RT8973A_EVENT_OVP: | |
314 | case RT8973A_EVENT_OTP: | |
315 | dev_warn(info->dev, | |
316 | "happen Over %s issue. Need to disconnect all cables\n", | |
317 | event == RT8973A_EVENT_OVP ? "Voltage" : "Temperature"); | |
318 | cable_type = prev_cable_type; | |
319 | attached = false; | |
320 | break; | |
321 | default: | |
322 | dev_err(info->dev, | |
323 | "Cannot handle this event (event:%d)\n", event); | |
324 | return -EINVAL; | |
325 | } | |
326 | prev_cable_type = cable_type; | |
327 | ||
328 | switch (cable_type) { | |
329 | case RT8973A_MUIC_ADC_OTG: | |
2a9de9c0 | 330 | id = EXTCON_USB_HOST; |
c03e017c CC |
331 | con_sw = DM_DP_SWITCH_USB; |
332 | break; | |
333 | case RT8973A_MUIC_ADC_TA: | |
11eecf91 | 334 | id = EXTCON_CHG_USB_DCP; |
c03e017c CC |
335 | con_sw = DM_DP_SWITCH_OPEN; |
336 | break; | |
337 | case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB: | |
c03e017c | 338 | case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB: |
2a9de9c0 | 339 | id = EXTCON_JIG; |
41b3c015 | 340 | con_sw = DM_DP_SWITCH_USB; |
c03e017c CC |
341 | break; |
342 | case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART: | |
c03e017c | 343 | case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART: |
2a9de9c0 | 344 | id = EXTCON_JIG; |
c03e017c CC |
345 | con_sw = DM_DP_SWITCH_UART; |
346 | break; | |
347 | case RT8973A_MUIC_ADC_USB: | |
2a9de9c0 | 348 | id = EXTCON_USB; |
c03e017c CC |
349 | con_sw = DM_DP_SWITCH_USB; |
350 | break; | |
351 | case RT8973A_MUIC_ADC_OPEN: | |
352 | return 0; | |
353 | case RT8973A_MUIC_ADC_UNKNOWN_ACC_1: | |
354 | case RT8973A_MUIC_ADC_UNKNOWN_ACC_2: | |
355 | case RT8973A_MUIC_ADC_UNKNOWN_ACC_3: | |
356 | case RT8973A_MUIC_ADC_UNKNOWN_ACC_4: | |
357 | case RT8973A_MUIC_ADC_UNKNOWN_ACC_5: | |
358 | dev_warn(info->dev, | |
359 | "Unknown accessory type (adc:0x%x)\n", cable_type); | |
360 | return 0; | |
361 | case RT8973A_MUIC_ADC_AUDIO_SEND_END_BUTTON: | |
362 | case RT8973A_MUIC_ADC_AUDIO_REMOTE_S1_BUTTON: | |
363 | case RT8973A_MUIC_ADC_AUDIO_REMOTE_S2_BUTTON: | |
364 | case RT8973A_MUIC_ADC_AUDIO_REMOTE_S3_BUTTON: | |
365 | case RT8973A_MUIC_ADC_AUDIO_REMOTE_S4_BUTTON: | |
366 | case RT8973A_MUIC_ADC_AUDIO_REMOTE_S5_BUTTON: | |
367 | case RT8973A_MUIC_ADC_AUDIO_REMOTE_S6_BUTTON: | |
368 | case RT8973A_MUIC_ADC_AUDIO_REMOTE_S7_BUTTON: | |
369 | case RT8973A_MUIC_ADC_AUDIO_REMOTE_S8_BUTTON: | |
370 | case RT8973A_MUIC_ADC_AUDIO_REMOTE_S9_BUTTON: | |
371 | case RT8973A_MUIC_ADC_AUDIO_REMOTE_S10_BUTTON: | |
372 | case RT8973A_MUIC_ADC_AUDIO_REMOTE_S11_BUTTON: | |
373 | case RT8973A_MUIC_ADC_AUDIO_REMOTE_S12_BUTTON: | |
374 | case RT8973A_MUIC_ADC_AUDIO_TYPE2: | |
375 | dev_warn(info->dev, | |
376 | "Audio device/button type (adc:0x%x)\n", cable_type); | |
377 | return 0; | |
378 | case RT8973A_MUIC_ADC_RESERVED_ACC_1: | |
379 | case RT8973A_MUIC_ADC_RESERVED_ACC_2: | |
380 | case RT8973A_MUIC_ADC_RESERVED_ACC_3: | |
381 | case RT8973A_MUIC_ADC_RESERVED_ACC_4: | |
382 | case RT8973A_MUIC_ADC_RESERVED_ACC_5: | |
383 | case RT8973A_MUIC_ADC_PHONE_POWERED_DEV: | |
384 | return 0; | |
385 | default: | |
386 | dev_err(info->dev, | |
387 | "Cannot handle this cable_type (adc:0x%x)\n", | |
388 | cable_type); | |
389 | return -EINVAL; | |
390 | } | |
391 | ||
392 | /* Change internal hardware path(DM_CON/DP_CON) */ | |
393 | ret = rt8973a_muic_set_path(info, con_sw, attached); | |
394 | if (ret < 0) | |
395 | return ret; | |
396 | ||
397 | /* Change the state of external accessory */ | |
8670b459 | 398 | extcon_set_state_sync(info->edev, id, attached); |
8b45b6a0 | 399 | if (id == EXTCON_USB) |
8670b459 | 400 | extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP, |
8b45b6a0 | 401 | attached); |
c03e017c CC |
402 | |
403 | return 0; | |
404 | } | |
405 | ||
406 | static void rt8973a_muic_irq_work(struct work_struct *work) | |
407 | { | |
408 | struct rt8973a_muic_info *info = container_of(work, | |
409 | struct rt8973a_muic_info, irq_work); | |
410 | int ret = 0; | |
411 | ||
412 | if (!info->edev) | |
413 | return; | |
414 | ||
415 | mutex_lock(&info->mutex); | |
416 | ||
417 | /* Detect attached or detached cables */ | |
418 | if (info->irq_attach) { | |
419 | ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_ATTACH); | |
420 | info->irq_attach = false; | |
421 | } | |
422 | ||
423 | if (info->irq_detach) { | |
424 | ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_DETACH); | |
425 | info->irq_detach = false; | |
426 | } | |
427 | ||
428 | if (info->irq_ovp) { | |
429 | ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_OVP); | |
430 | info->irq_ovp = false; | |
431 | } | |
432 | ||
433 | if (info->irq_otp) { | |
434 | ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_OTP); | |
435 | info->irq_otp = false; | |
436 | } | |
437 | ||
438 | if (ret < 0) | |
439 | dev_err(info->dev, "failed to handle MUIC interrupt\n"); | |
440 | ||
441 | mutex_unlock(&info->mutex); | |
442 | } | |
443 | ||
444 | static irqreturn_t rt8973a_muic_irq_handler(int irq, void *data) | |
445 | { | |
446 | struct rt8973a_muic_info *info = data; | |
447 | int i, irq_type = -1; | |
448 | ||
449 | for (i = 0; i < info->num_muic_irqs; i++) | |
450 | if (irq == info->muic_irqs[i].virq) | |
451 | irq_type = info->muic_irqs[i].irq; | |
452 | ||
453 | switch (irq_type) { | |
454 | case RT8973A_INT1_ATTACH: | |
455 | info->irq_attach = true; | |
456 | break; | |
457 | case RT8973A_INT1_DETACH: | |
458 | info->irq_detach = true; | |
459 | break; | |
460 | case RT8973A_INT1_OVP: | |
461 | info->irq_ovp = true; | |
462 | break; | |
463 | case RT8973A_INT1_OTP: | |
464 | info->irq_otp = true; | |
465 | break; | |
466 | case RT8973A_INT1_CHGDET: | |
467 | case RT8973A_INT1_DCD_T: | |
468 | case RT8973A_INT1_CONNECT: | |
469 | case RT8973A_INT1_ADC_CHG: | |
470 | case RT8973A_INT2_UVLO: | |
471 | case RT8973A_INT2_POR: | |
472 | case RT8973A_INT2_OTP_FET: | |
473 | case RT8973A_INT2_OVP_FET: | |
474 | case RT8973A_INT2_OCP_LATCH: | |
475 | case RT8973A_INT2_OCP: | |
476 | case RT8973A_INT2_OVP_OCP: | |
477 | default: | |
478 | dev_dbg(info->dev, | |
479 | "Cannot handle this interrupt (%d)\n", irq_type); | |
480 | break; | |
481 | } | |
482 | ||
483 | schedule_work(&info->irq_work); | |
484 | ||
485 | return IRQ_HANDLED; | |
486 | } | |
487 | ||
488 | static void rt8973a_muic_detect_cable_wq(struct work_struct *work) | |
489 | { | |
490 | struct rt8973a_muic_info *info = container_of(to_delayed_work(work), | |
491 | struct rt8973a_muic_info, wq_detcable); | |
492 | int ret; | |
493 | ||
494 | /* Notify the state of connector cable or not */ | |
495 | ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_ATTACH); | |
496 | if (ret < 0) | |
497 | dev_warn(info->dev, "failed to detect cable state\n"); | |
498 | } | |
499 | ||
500 | static void rt8973a_init_dev_type(struct rt8973a_muic_info *info) | |
501 | { | |
502 | unsigned int data, vendor_id, version_id; | |
503 | int i, ret; | |
504 | ||
505 | /* To test I2C, Print version_id and vendor_id of RT8973A */ | |
506 | ret = regmap_read(info->regmap, RT8973A_REG_DEVICE_ID, &data); | |
507 | if (ret) { | |
508 | dev_err(info->dev, | |
509 | "failed to read DEVICE_ID register: %d\n", ret); | |
510 | return; | |
511 | } | |
512 | ||
513 | vendor_id = ((data & RT8973A_REG_DEVICE_ID_VENDOR_MASK) >> | |
514 | RT8973A_REG_DEVICE_ID_VENDOR_SHIFT); | |
515 | version_id = ((data & RT8973A_REG_DEVICE_ID_VERSION_MASK) >> | |
516 | RT8973A_REG_DEVICE_ID_VERSION_SHIFT); | |
517 | ||
518 | dev_info(info->dev, "Device type: version: 0x%x, vendor: 0x%x\n", | |
519 | version_id, vendor_id); | |
520 | ||
521 | /* Initiazle the register of RT8973A device to bring-up */ | |
522 | for (i = 0; i < info->num_reg_data; i++) { | |
523 | u8 reg = info->reg_data[i].reg; | |
524 | u8 mask = info->reg_data[i].mask; | |
525 | u8 val = 0; | |
526 | ||
527 | if (info->reg_data[i].invert) | |
528 | val = ~info->reg_data[i].val; | |
529 | else | |
530 | val = info->reg_data[i].val; | |
531 | ||
532 | regmap_update_bits(info->regmap, reg, mask, val); | |
533 | } | |
534 | ||
c6efb58d | 535 | /* Check whether RT8973A is auto switching mode or not */ |
c03e017c CC |
536 | ret = regmap_read(info->regmap, RT8973A_REG_CONTROL1, &data); |
537 | if (ret) { | |
538 | dev_err(info->dev, | |
539 | "failed to read CONTROL1 register: %d\n", ret); | |
540 | return; | |
541 | } | |
542 | ||
543 | data &= RT8973A_REG_CONTROL1_AUTO_CONFIG_MASK; | |
544 | if (data) { | |
545 | info->auto_config = true; | |
546 | dev_info(info->dev, | |
547 | "Enable Auto-configuration for internal path\n"); | |
548 | } | |
549 | } | |
550 | ||
881de30c | 551 | static int rt8973a_muic_i2c_probe(struct i2c_client *i2c) |
c03e017c CC |
552 | { |
553 | struct device_node *np = i2c->dev.of_node; | |
554 | struct rt8973a_muic_info *info; | |
555 | int i, ret, irq_flags; | |
556 | ||
557 | if (!np) | |
558 | return -EINVAL; | |
559 | ||
560 | info = devm_kzalloc(&i2c->dev, sizeof(*info), GFP_KERNEL); | |
34825e51 | 561 | if (!info) |
c03e017c | 562 | return -ENOMEM; |
c03e017c CC |
563 | i2c_set_clientdata(i2c, info); |
564 | ||
565 | info->dev = &i2c->dev; | |
566 | info->i2c = i2c; | |
567 | info->irq = i2c->irq; | |
568 | info->muic_irqs = rt8973a_muic_irqs; | |
569 | info->num_muic_irqs = ARRAY_SIZE(rt8973a_muic_irqs); | |
570 | info->reg_data = rt8973a_reg_data; | |
571 | info->num_reg_data = ARRAY_SIZE(rt8973a_reg_data); | |
572 | ||
573 | mutex_init(&info->mutex); | |
574 | ||
575 | INIT_WORK(&info->irq_work, rt8973a_muic_irq_work); | |
576 | ||
577 | info->regmap = devm_regmap_init_i2c(i2c, &rt8973a_muic_regmap_config); | |
578 | if (IS_ERR(info->regmap)) { | |
579 | ret = PTR_ERR(info->regmap); | |
580 | dev_err(info->dev, "failed to allocate register map: %d\n", | |
581 | ret); | |
582 | return ret; | |
583 | } | |
584 | ||
585 | /* Support irq domain for RT8973A MUIC device */ | |
586 | irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED; | |
587 | ret = regmap_add_irq_chip(info->regmap, info->irq, irq_flags, 0, | |
588 | &rt8973a_muic_irq_chip, &info->irq_data); | |
589 | if (ret != 0) { | |
590 | dev_err(info->dev, "failed to add irq_chip (irq:%d, err:%d)\n", | |
591 | info->irq, ret); | |
592 | return ret; | |
593 | } | |
594 | ||
595 | for (i = 0; i < info->num_muic_irqs; i++) { | |
596 | struct muic_irq *muic_irq = &info->muic_irqs[i]; | |
238ffc2e | 597 | int virq = 0; |
c03e017c CC |
598 | |
599 | virq = regmap_irq_get_virq(info->irq_data, muic_irq->irq); | |
600 | if (virq <= 0) | |
601 | return -EINVAL; | |
602 | muic_irq->virq = virq; | |
603 | ||
604 | ret = devm_request_threaded_irq(info->dev, virq, NULL, | |
605 | rt8973a_muic_irq_handler, | |
5f01e6bc | 606 | IRQF_NO_SUSPEND | IRQF_ONESHOT, |
c03e017c CC |
607 | muic_irq->name, info); |
608 | if (ret) { | |
609 | dev_err(info->dev, | |
610 | "failed: irq request (IRQ: %d, error :%d)\n", | |
611 | muic_irq->irq, ret); | |
612 | return ret; | |
613 | } | |
614 | } | |
615 | ||
616 | /* Allocate extcon device */ | |
617 | info->edev = devm_extcon_dev_allocate(info->dev, rt8973a_extcon_cable); | |
618 | if (IS_ERR(info->edev)) { | |
619 | dev_err(info->dev, "failed to allocate memory for extcon\n"); | |
620 | return -ENOMEM; | |
621 | } | |
c03e017c CC |
622 | |
623 | /* Register extcon device */ | |
624 | ret = devm_extcon_dev_register(info->dev, info->edev); | |
625 | if (ret) { | |
626 | dev_err(info->dev, "failed to register extcon device\n"); | |
627 | return ret; | |
628 | } | |
629 | ||
630 | /* | |
631 | * Detect accessory after completing the initialization of platform | |
632 | * | |
633 | * - Use delayed workqueue to detect cable state and then | |
634 | * notify cable state to notifiee/platform through uevent. | |
635 | * After completing the booting of platform, the extcon provider | |
636 | * driver should notify cable state to upper layer. | |
637 | */ | |
638 | INIT_DELAYED_WORK(&info->wq_detcable, rt8973a_muic_detect_cable_wq); | |
639 | queue_delayed_work(system_power_efficient_wq, &info->wq_detcable, | |
640 | msecs_to_jiffies(DELAY_MS_DEFAULT)); | |
641 | ||
642 | /* Initialize RT8973A device and print vendor id and version id */ | |
643 | rt8973a_init_dev_type(info); | |
644 | ||
645 | return 0; | |
646 | } | |
647 | ||
ed5c2f5f | 648 | static void rt8973a_muic_i2c_remove(struct i2c_client *i2c) |
c03e017c CC |
649 | { |
650 | struct rt8973a_muic_info *info = i2c_get_clientdata(i2c); | |
651 | ||
652 | regmap_del_irq_chip(info->irq, info->irq_data); | |
c03e017c CC |
653 | } |
654 | ||
34825e51 | 655 | static const struct of_device_id rt8973a_dt_match[] = { |
c03e017c CC |
656 | { .compatible = "richtek,rt8973a-muic" }, |
657 | { }, | |
658 | }; | |
ff612f91 | 659 | MODULE_DEVICE_TABLE(of, rt8973a_dt_match); |
c03e017c CC |
660 | |
661 | #ifdef CONFIG_PM_SLEEP | |
662 | static int rt8973a_muic_suspend(struct device *dev) | |
663 | { | |
d5859342 | 664 | struct i2c_client *i2c = to_i2c_client(dev); |
c03e017c CC |
665 | struct rt8973a_muic_info *info = i2c_get_clientdata(i2c); |
666 | ||
667 | enable_irq_wake(info->irq); | |
668 | ||
669 | return 0; | |
670 | } | |
671 | ||
672 | static int rt8973a_muic_resume(struct device *dev) | |
673 | { | |
d5859342 | 674 | struct i2c_client *i2c = to_i2c_client(dev); |
c03e017c CC |
675 | struct rt8973a_muic_info *info = i2c_get_clientdata(i2c); |
676 | ||
677 | disable_irq_wake(info->irq); | |
678 | ||
679 | return 0; | |
680 | } | |
681 | #endif | |
682 | ||
683 | static SIMPLE_DEV_PM_OPS(rt8973a_muic_pm_ops, | |
684 | rt8973a_muic_suspend, rt8973a_muic_resume); | |
685 | ||
686 | static const struct i2c_device_id rt8973a_i2c_id[] = { | |
687 | { "rt8973a", TYPE_RT8973A }, | |
688 | { } | |
689 | }; | |
690 | MODULE_DEVICE_TABLE(i2c, rt8973a_i2c_id); | |
691 | ||
692 | static struct i2c_driver rt8973a_muic_i2c_driver = { | |
693 | .driver = { | |
694 | .name = "rt8973a", | |
c03e017c CC |
695 | .pm = &rt8973a_muic_pm_ops, |
696 | .of_match_table = rt8973a_dt_match, | |
697 | }, | |
bcfa8e33 | 698 | .probe = rt8973a_muic_i2c_probe, |
c03e017c CC |
699 | .remove = rt8973a_muic_i2c_remove, |
700 | .id_table = rt8973a_i2c_id, | |
701 | }; | |
702 | ||
703 | static int __init rt8973a_muic_i2c_init(void) | |
704 | { | |
705 | return i2c_add_driver(&rt8973a_muic_i2c_driver); | |
706 | } | |
707 | subsys_initcall(rt8973a_muic_i2c_init); | |
708 | ||
709 | MODULE_DESCRIPTION("Richtek RT8973A Extcon driver"); | |
710 | MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>"); | |
711 | MODULE_LICENSE("GPL"); |