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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
914b881f CC |
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> | |
914b881f CC |
7 | */ |
8 | ||
9 | #include <linux/err.h> | |
10 | #include <linux/i2c.h> | |
914b881f CC |
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> | |
176aa360 | 18 | #include <linux/extcon-provider.h> |
ca2a07e4 CC |
19 | |
20 | #include "extcon-sm5502.h" | |
914b881f | 21 | |
e1954452 CC |
22 | #define DELAY_MS_DEFAULT 17000 /* unit: millisecond */ |
23 | ||
914b881f CC |
24 | struct muic_irq { |
25 | unsigned int irq; | |
26 | const char *name; | |
27 | unsigned int virq; | |
28 | }; | |
29 | ||
30 | struct reg_data { | |
31 | u8 reg; | |
32 | unsigned int val; | |
33 | bool invert; | |
34 | }; | |
35 | ||
36 | struct sm5502_muic_info { | |
37 | struct device *dev; | |
38 | struct extcon_dev *edev; | |
39 | ||
40 | struct i2c_client *i2c; | |
41 | struct regmap *regmap; | |
42 | ||
43 | struct regmap_irq_chip_data *irq_data; | |
44 | struct muic_irq *muic_irqs; | |
45 | unsigned int num_muic_irqs; | |
46 | int irq; | |
47 | bool irq_attach; | |
48 | bool irq_detach; | |
49 | struct work_struct irq_work; | |
50 | ||
51 | struct reg_data *reg_data; | |
52 | unsigned int num_reg_data; | |
53 | ||
54 | struct mutex mutex; | |
e1954452 CC |
55 | |
56 | /* | |
57 | * Use delayed workqueue to detect cable state and then | |
58 | * notify cable state to notifiee/platform through uevent. | |
59 | * After completing the booting of platform, the extcon provider | |
60 | * driver should notify cable state to upper layer. | |
61 | */ | |
62 | struct delayed_work wq_detcable; | |
914b881f CC |
63 | }; |
64 | ||
65 | /* Default value of SM5502 register to bring up MUIC device. */ | |
66 | static struct reg_data sm5502_reg_data[] = { | |
67 | { | |
68 | .reg = SM5502_REG_CONTROL, | |
69 | .val = SM5502_REG_CONTROL_MASK_INT_MASK, | |
70 | .invert = false, | |
71 | }, { | |
72 | .reg = SM5502_REG_INTMASK1, | |
73 | .val = SM5502_REG_INTM1_KP_MASK | |
74 | | SM5502_REG_INTM1_LKP_MASK | |
75 | | SM5502_REG_INTM1_LKR_MASK, | |
76 | .invert = true, | |
77 | }, { | |
78 | .reg = SM5502_REG_INTMASK2, | |
79 | .val = SM5502_REG_INTM2_VBUS_DET_MASK | |
80 | | SM5502_REG_INTM2_REV_ACCE_MASK | |
81 | | SM5502_REG_INTM2_ADC_CHG_MASK | |
82 | | SM5502_REG_INTM2_STUCK_KEY_MASK | |
83 | | SM5502_REG_INTM2_STUCK_KEY_RCV_MASK | |
84 | | SM5502_REG_INTM2_MHL_MASK, | |
85 | .invert = true, | |
86 | }, | |
87 | { } | |
88 | }; | |
89 | ||
90 | /* List of detectable cables */ | |
73b6ecdb | 91 | static const unsigned int sm5502_extcon_cable[] = { |
2a9de9c0 CC |
92 | EXTCON_USB, |
93 | EXTCON_USB_HOST, | |
8b45b6a0 | 94 | EXTCON_CHG_USB_SDP, |
11eecf91 | 95 | EXTCON_CHG_USB_DCP, |
2a9de9c0 | 96 | EXTCON_NONE, |
914b881f CC |
97 | }; |
98 | ||
99 | /* Define supported accessory type */ | |
100 | enum sm5502_muic_acc_type { | |
101 | SM5502_MUIC_ADC_GROUND = 0x0, | |
102 | SM5502_MUIC_ADC_SEND_END_BUTTON, | |
103 | SM5502_MUIC_ADC_REMOTE_S1_BUTTON, | |
104 | SM5502_MUIC_ADC_REMOTE_S2_BUTTON, | |
105 | SM5502_MUIC_ADC_REMOTE_S3_BUTTON, | |
106 | SM5502_MUIC_ADC_REMOTE_S4_BUTTON, | |
107 | SM5502_MUIC_ADC_REMOTE_S5_BUTTON, | |
108 | SM5502_MUIC_ADC_REMOTE_S6_BUTTON, | |
109 | SM5502_MUIC_ADC_REMOTE_S7_BUTTON, | |
110 | SM5502_MUIC_ADC_REMOTE_S8_BUTTON, | |
111 | SM5502_MUIC_ADC_REMOTE_S9_BUTTON, | |
112 | SM5502_MUIC_ADC_REMOTE_S10_BUTTON, | |
113 | SM5502_MUIC_ADC_REMOTE_S11_BUTTON, | |
114 | SM5502_MUIC_ADC_REMOTE_S12_BUTTON, | |
115 | SM5502_MUIC_ADC_RESERVED_ACC_1, | |
116 | SM5502_MUIC_ADC_RESERVED_ACC_2, | |
117 | SM5502_MUIC_ADC_RESERVED_ACC_3, | |
118 | SM5502_MUIC_ADC_RESERVED_ACC_4, | |
119 | SM5502_MUIC_ADC_RESERVED_ACC_5, | |
120 | SM5502_MUIC_ADC_AUDIO_TYPE2, | |
121 | SM5502_MUIC_ADC_PHONE_POWERED_DEV, | |
122 | SM5502_MUIC_ADC_TTY_CONVERTER, | |
123 | SM5502_MUIC_ADC_UART_CABLE, | |
124 | SM5502_MUIC_ADC_TYPE1_CHARGER, | |
125 | SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB, | |
126 | SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB, | |
127 | SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE, | |
128 | SM5502_MUIC_ADC_TYPE2_CHARGER, | |
129 | SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART, | |
130 | SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART, | |
131 | SM5502_MUIC_ADC_AUDIO_TYPE1, | |
132 | SM5502_MUIC_ADC_OPEN = 0x1f, | |
133 | ||
af57fa4d SR |
134 | /* |
135 | * The below accessories have same ADC value (0x1f or 0x1e). | |
136 | * So, Device type1 is used to separate specific accessory. | |
137 | */ | |
914b881f CC |
138 | /* |---------|--ADC| */ |
139 | /* | [7:5]|[4:0]| */ | |
140 | SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE = 0x3e, /* | 001|11110| */ | |
141 | SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END = 0x5e, /* | 010|11110| */ | |
142 | /* |Dev Type1|--ADC| */ | |
143 | SM5502_MUIC_ADC_OPEN_USB = 0x5f, /* | 010|11111| */ | |
144 | SM5502_MUIC_ADC_OPEN_TA = 0xdf, /* | 110|11111| */ | |
145 | SM5502_MUIC_ADC_OPEN_USB_OTG = 0xff, /* | 111|11111| */ | |
146 | }; | |
147 | ||
148 | /* List of supported interrupt for SM5502 */ | |
149 | static struct muic_irq sm5502_muic_irqs[] = { | |
150 | { SM5502_IRQ_INT1_ATTACH, "muic-attach" }, | |
151 | { SM5502_IRQ_INT1_DETACH, "muic-detach" }, | |
152 | { SM5502_IRQ_INT1_KP, "muic-kp" }, | |
153 | { SM5502_IRQ_INT1_LKP, "muic-lkp" }, | |
154 | { SM5502_IRQ_INT1_LKR, "muic-lkr" }, | |
155 | { SM5502_IRQ_INT1_OVP_EVENT, "muic-ovp-event" }, | |
156 | { SM5502_IRQ_INT1_OCP_EVENT, "muic-ocp-event" }, | |
157 | { SM5502_IRQ_INT1_OVP_OCP_DIS, "muic-ovp-ocp-dis" }, | |
158 | { SM5502_IRQ_INT2_VBUS_DET, "muic-vbus-det" }, | |
159 | { SM5502_IRQ_INT2_REV_ACCE, "muic-rev-acce" }, | |
160 | { SM5502_IRQ_INT2_ADC_CHG, "muic-adc-chg" }, | |
161 | { SM5502_IRQ_INT2_STUCK_KEY, "muic-stuck-key" }, | |
162 | { SM5502_IRQ_INT2_STUCK_KEY_RCV, "muic-stuck-key-rcv" }, | |
163 | { SM5502_IRQ_INT2_MHL, "muic-mhl" }, | |
164 | }; | |
165 | ||
166 | /* Define interrupt list of SM5502 to register regmap_irq */ | |
167 | static const struct regmap_irq sm5502_irqs[] = { | |
168 | /* INT1 interrupts */ | |
169 | { .reg_offset = 0, .mask = SM5502_IRQ_INT1_ATTACH_MASK, }, | |
170 | { .reg_offset = 0, .mask = SM5502_IRQ_INT1_DETACH_MASK, }, | |
171 | { .reg_offset = 0, .mask = SM5502_IRQ_INT1_KP_MASK, }, | |
172 | { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKP_MASK, }, | |
173 | { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKR_MASK, }, | |
174 | { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_EVENT_MASK, }, | |
175 | { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OCP_EVENT_MASK, }, | |
176 | { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_OCP_DIS_MASK, }, | |
177 | ||
178 | /* INT2 interrupts */ | |
179 | { .reg_offset = 1, .mask = SM5502_IRQ_INT2_VBUS_DET_MASK,}, | |
180 | { .reg_offset = 1, .mask = SM5502_IRQ_INT2_REV_ACCE_MASK, }, | |
181 | { .reg_offset = 1, .mask = SM5502_IRQ_INT2_ADC_CHG_MASK, }, | |
182 | { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_MASK, }, | |
183 | { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_RCV_MASK, }, | |
184 | { .reg_offset = 1, .mask = SM5502_IRQ_INT2_MHL_MASK, }, | |
185 | }; | |
186 | ||
187 | static const struct regmap_irq_chip sm5502_muic_irq_chip = { | |
188 | .name = "sm5502", | |
189 | .status_base = SM5502_REG_INT1, | |
190 | .mask_base = SM5502_REG_INTMASK1, | |
191 | .mask_invert = false, | |
192 | .num_regs = 2, | |
193 | .irqs = sm5502_irqs, | |
194 | .num_irqs = ARRAY_SIZE(sm5502_irqs), | |
195 | }; | |
196 | ||
197 | /* Define regmap configuration of SM5502 for I2C communication */ | |
198 | static bool sm5502_muic_volatile_reg(struct device *dev, unsigned int reg) | |
199 | { | |
200 | switch (reg) { | |
201 | case SM5502_REG_INTMASK1: | |
202 | case SM5502_REG_INTMASK2: | |
203 | return true; | |
204 | default: | |
205 | break; | |
206 | } | |
207 | return false; | |
208 | } | |
209 | ||
210 | static const struct regmap_config sm5502_muic_regmap_config = { | |
211 | .reg_bits = 8, | |
212 | .val_bits = 8, | |
213 | .volatile_reg = sm5502_muic_volatile_reg, | |
214 | .max_register = SM5502_REG_END, | |
215 | }; | |
216 | ||
a75fed2e CC |
217 | /* Change DM_CON/DP_CON/VBUSIN switch according to cable type */ |
218 | static int sm5502_muic_set_path(struct sm5502_muic_info *info, | |
219 | unsigned int con_sw, unsigned int vbus_sw, | |
220 | bool attached) | |
221 | { | |
222 | int ret; | |
223 | ||
224 | if (!attached) { | |
225 | con_sw = DM_DP_SWITCH_OPEN; | |
226 | vbus_sw = VBUSIN_SWITCH_OPEN; | |
227 | } | |
228 | ||
229 | switch (con_sw) { | |
230 | case DM_DP_SWITCH_OPEN: | |
231 | case DM_DP_SWITCH_USB: | |
232 | case DM_DP_SWITCH_AUDIO: | |
233 | case DM_DP_SWITCH_UART: | |
234 | ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1, | |
235 | SM5502_REG_MANUAL_SW1_DP_MASK | | |
236 | SM5502_REG_MANUAL_SW1_DM_MASK, | |
237 | con_sw); | |
238 | if (ret < 0) { | |
239 | dev_err(info->dev, | |
240 | "cannot update DM_CON/DP_CON switch\n"); | |
241 | return ret; | |
242 | } | |
243 | break; | |
244 | default: | |
245 | dev_err(info->dev, "Unknown DM_CON/DP_CON switch type (%d)\n", | |
246 | con_sw); | |
247 | return -EINVAL; | |
248 | }; | |
249 | ||
250 | switch (vbus_sw) { | |
251 | case VBUSIN_SWITCH_OPEN: | |
252 | case VBUSIN_SWITCH_VBUSOUT: | |
253 | case VBUSIN_SWITCH_MIC: | |
254 | case VBUSIN_SWITCH_VBUSOUT_WITH_USB: | |
255 | ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1, | |
256 | SM5502_REG_MANUAL_SW1_VBUSIN_MASK, | |
257 | vbus_sw); | |
258 | if (ret < 0) { | |
259 | dev_err(info->dev, | |
260 | "cannot update VBUSIN switch\n"); | |
261 | return ret; | |
262 | } | |
263 | break; | |
264 | default: | |
265 | dev_err(info->dev, "Unknown VBUS switch type (%d)\n", vbus_sw); | |
266 | return -EINVAL; | |
267 | }; | |
268 | ||
269 | return 0; | |
270 | } | |
271 | ||
914b881f CC |
272 | /* Return cable type of attached or detached accessories */ |
273 | static unsigned int sm5502_muic_get_cable_type(struct sm5502_muic_info *info) | |
274 | { | |
275 | unsigned int cable_type = -1, adc, dev_type1; | |
276 | int ret; | |
277 | ||
278 | /* Read ADC value according to external cable or button */ | |
279 | ret = regmap_read(info->regmap, SM5502_REG_ADC, &adc); | |
280 | if (ret) { | |
281 | dev_err(info->dev, "failed to read ADC register\n"); | |
282 | return ret; | |
283 | } | |
284 | ||
285 | /* | |
286 | * If ADC is SM5502_MUIC_ADC_GROUND(0x0), external cable hasn't | |
287 | * connected with to MUIC device. | |
288 | */ | |
0ccc7955 | 289 | cable_type = adc & SM5502_REG_ADC_MASK; |
914b881f CC |
290 | if (cable_type == SM5502_MUIC_ADC_GROUND) |
291 | return SM5502_MUIC_ADC_GROUND; | |
292 | ||
293 | switch (cable_type) { | |
294 | case SM5502_MUIC_ADC_GROUND: | |
295 | case SM5502_MUIC_ADC_SEND_END_BUTTON: | |
296 | case SM5502_MUIC_ADC_REMOTE_S1_BUTTON: | |
297 | case SM5502_MUIC_ADC_REMOTE_S2_BUTTON: | |
298 | case SM5502_MUIC_ADC_REMOTE_S3_BUTTON: | |
299 | case SM5502_MUIC_ADC_REMOTE_S4_BUTTON: | |
300 | case SM5502_MUIC_ADC_REMOTE_S5_BUTTON: | |
301 | case SM5502_MUIC_ADC_REMOTE_S6_BUTTON: | |
302 | case SM5502_MUIC_ADC_REMOTE_S7_BUTTON: | |
303 | case SM5502_MUIC_ADC_REMOTE_S8_BUTTON: | |
304 | case SM5502_MUIC_ADC_REMOTE_S9_BUTTON: | |
305 | case SM5502_MUIC_ADC_REMOTE_S10_BUTTON: | |
306 | case SM5502_MUIC_ADC_REMOTE_S11_BUTTON: | |
307 | case SM5502_MUIC_ADC_REMOTE_S12_BUTTON: | |
308 | case SM5502_MUIC_ADC_RESERVED_ACC_1: | |
309 | case SM5502_MUIC_ADC_RESERVED_ACC_2: | |
310 | case SM5502_MUIC_ADC_RESERVED_ACC_3: | |
311 | case SM5502_MUIC_ADC_RESERVED_ACC_4: | |
312 | case SM5502_MUIC_ADC_RESERVED_ACC_5: | |
313 | case SM5502_MUIC_ADC_AUDIO_TYPE2: | |
314 | case SM5502_MUIC_ADC_PHONE_POWERED_DEV: | |
315 | case SM5502_MUIC_ADC_TTY_CONVERTER: | |
316 | case SM5502_MUIC_ADC_UART_CABLE: | |
317 | case SM5502_MUIC_ADC_TYPE1_CHARGER: | |
318 | case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB: | |
319 | case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB: | |
320 | case SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE: | |
321 | case SM5502_MUIC_ADC_TYPE2_CHARGER: | |
322 | case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART: | |
323 | case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART: | |
324 | break; | |
325 | case SM5502_MUIC_ADC_AUDIO_TYPE1: | |
326 | /* | |
327 | * Check whether cable type is | |
328 | * SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE | |
329 | * or SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END | |
330 | * by using Button event. | |
331 | */ | |
332 | break; | |
333 | case SM5502_MUIC_ADC_OPEN: | |
334 | ret = regmap_read(info->regmap, SM5502_REG_DEV_TYPE1, | |
335 | &dev_type1); | |
336 | if (ret) { | |
337 | dev_err(info->dev, "failed to read DEV_TYPE1 reg\n"); | |
338 | return ret; | |
339 | } | |
340 | ||
341 | switch (dev_type1) { | |
342 | case SM5502_REG_DEV_TYPE1_USB_SDP_MASK: | |
343 | cable_type = SM5502_MUIC_ADC_OPEN_USB; | |
344 | break; | |
345 | case SM5502_REG_DEV_TYPE1_DEDICATED_CHG_MASK: | |
346 | cable_type = SM5502_MUIC_ADC_OPEN_TA; | |
347 | break; | |
348 | case SM5502_REG_DEV_TYPE1_USB_OTG_MASK: | |
349 | cable_type = SM5502_MUIC_ADC_OPEN_USB_OTG; | |
350 | break; | |
351 | default: | |
352 | dev_dbg(info->dev, | |
34825e51 CC |
353 | "cannot identify the cable type: adc(0x%x)\n", |
354 | adc); | |
914b881f CC |
355 | return -EINVAL; |
356 | }; | |
357 | break; | |
358 | default: | |
359 | dev_err(info->dev, | |
360 | "failed to identify the cable type: adc(0x%x)\n", adc); | |
361 | return -EINVAL; | |
362 | }; | |
363 | ||
364 | return cable_type; | |
365 | } | |
366 | ||
367 | static int sm5502_muic_cable_handler(struct sm5502_muic_info *info, | |
368 | bool attached) | |
369 | { | |
370 | static unsigned int prev_cable_type = SM5502_MUIC_ADC_GROUND; | |
914b881f | 371 | unsigned int cable_type = SM5502_MUIC_ADC_GROUND; |
a75fed2e CC |
372 | unsigned int con_sw = DM_DP_SWITCH_OPEN; |
373 | unsigned int vbus_sw = VBUSIN_SWITCH_OPEN; | |
73b6ecdb | 374 | unsigned int id; |
a75fed2e | 375 | int ret; |
914b881f | 376 | |
914b881f CC |
377 | /* Get the type of attached or detached cable */ |
378 | if (attached) | |
379 | cable_type = sm5502_muic_get_cable_type(info); | |
fbae30d8 | 380 | else |
914b881f CC |
381 | cable_type = prev_cable_type; |
382 | prev_cable_type = cable_type; | |
383 | ||
384 | switch (cable_type) { | |
385 | case SM5502_MUIC_ADC_OPEN_USB: | |
2a9de9c0 | 386 | id = EXTCON_USB; |
a75fed2e CC |
387 | con_sw = DM_DP_SWITCH_USB; |
388 | vbus_sw = VBUSIN_SWITCH_VBUSOUT_WITH_USB; | |
914b881f CC |
389 | break; |
390 | case SM5502_MUIC_ADC_OPEN_TA: | |
11eecf91 | 391 | id = EXTCON_CHG_USB_DCP; |
a75fed2e CC |
392 | con_sw = DM_DP_SWITCH_OPEN; |
393 | vbus_sw = VBUSIN_SWITCH_VBUSOUT; | |
914b881f CC |
394 | break; |
395 | case SM5502_MUIC_ADC_OPEN_USB_OTG: | |
2a9de9c0 | 396 | id = EXTCON_USB_HOST; |
a75fed2e CC |
397 | con_sw = DM_DP_SWITCH_USB; |
398 | vbus_sw = VBUSIN_SWITCH_OPEN; | |
e1954452 | 399 | break; |
914b881f CC |
400 | default: |
401 | dev_dbg(info->dev, | |
402 | "cannot handle this cable_type (0x%x)\n", cable_type); | |
403 | return 0; | |
404 | }; | |
405 | ||
a75fed2e CC |
406 | /* Change internal hardware path(DM_CON/DP_CON, VBUSIN) */ |
407 | ret = sm5502_muic_set_path(info, con_sw, vbus_sw, attached); | |
408 | if (ret < 0) | |
409 | return ret; | |
410 | ||
411 | /* Change the state of external accessory */ | |
8670b459 | 412 | extcon_set_state_sync(info->edev, id, attached); |
8b45b6a0 | 413 | if (id == EXTCON_USB) |
8670b459 | 414 | extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP, |
8b45b6a0 | 415 | attached); |
914b881f CC |
416 | |
417 | return 0; | |
418 | } | |
419 | ||
420 | static void sm5502_muic_irq_work(struct work_struct *work) | |
421 | { | |
422 | struct sm5502_muic_info *info = container_of(work, | |
423 | struct sm5502_muic_info, irq_work); | |
424 | int ret = 0; | |
425 | ||
426 | if (!info->edev) | |
427 | return; | |
428 | ||
429 | mutex_lock(&info->mutex); | |
430 | ||
431 | /* Detect attached or detached cables */ | |
432 | if (info->irq_attach) { | |
433 | ret = sm5502_muic_cable_handler(info, true); | |
434 | info->irq_attach = false; | |
435 | } | |
436 | if (info->irq_detach) { | |
437 | ret = sm5502_muic_cable_handler(info, false); | |
438 | info->irq_detach = false; | |
439 | } | |
440 | ||
441 | if (ret < 0) | |
442 | dev_err(info->dev, "failed to handle MUIC interrupt\n"); | |
443 | ||
444 | mutex_unlock(&info->mutex); | |
914b881f CC |
445 | } |
446 | ||
447 | /* | |
448 | * Sets irq_attach or irq_detach in sm5502_muic_info and returns 0. | |
449 | * Returns -ESRCH if irq_type does not match registered IRQ for this dev type. | |
450 | */ | |
451 | static int sm5502_parse_irq(struct sm5502_muic_info *info, int irq_type) | |
452 | { | |
453 | switch (irq_type) { | |
454 | case SM5502_IRQ_INT1_ATTACH: | |
455 | info->irq_attach = true; | |
456 | break; | |
457 | case SM5502_IRQ_INT1_DETACH: | |
458 | info->irq_detach = true; | |
459 | break; | |
460 | case SM5502_IRQ_INT1_KP: | |
461 | case SM5502_IRQ_INT1_LKP: | |
462 | case SM5502_IRQ_INT1_LKR: | |
463 | case SM5502_IRQ_INT1_OVP_EVENT: | |
464 | case SM5502_IRQ_INT1_OCP_EVENT: | |
465 | case SM5502_IRQ_INT1_OVP_OCP_DIS: | |
466 | case SM5502_IRQ_INT2_VBUS_DET: | |
467 | case SM5502_IRQ_INT2_REV_ACCE: | |
468 | case SM5502_IRQ_INT2_ADC_CHG: | |
469 | case SM5502_IRQ_INT2_STUCK_KEY: | |
470 | case SM5502_IRQ_INT2_STUCK_KEY_RCV: | |
471 | case SM5502_IRQ_INT2_MHL: | |
472 | default: | |
473 | break; | |
474 | } | |
475 | ||
476 | return 0; | |
477 | } | |
478 | ||
479 | static irqreturn_t sm5502_muic_irq_handler(int irq, void *data) | |
480 | { | |
481 | struct sm5502_muic_info *info = data; | |
482 | int i, irq_type = -1, ret; | |
483 | ||
484 | for (i = 0; i < info->num_muic_irqs; i++) | |
485 | if (irq == info->muic_irqs[i].virq) | |
486 | irq_type = info->muic_irqs[i].irq; | |
487 | ||
488 | ret = sm5502_parse_irq(info, irq_type); | |
489 | if (ret < 0) { | |
490 | dev_warn(info->dev, "cannot handle is interrupt:%d\n", | |
491 | irq_type); | |
492 | return IRQ_HANDLED; | |
493 | } | |
494 | schedule_work(&info->irq_work); | |
495 | ||
496 | return IRQ_HANDLED; | |
497 | } | |
498 | ||
e1954452 CC |
499 | static void sm5502_muic_detect_cable_wq(struct work_struct *work) |
500 | { | |
501 | struct sm5502_muic_info *info = container_of(to_delayed_work(work), | |
502 | struct sm5502_muic_info, wq_detcable); | |
503 | int ret; | |
504 | ||
505 | /* Notify the state of connector cable or not */ | |
506 | ret = sm5502_muic_cable_handler(info, true); | |
507 | if (ret < 0) | |
508 | dev_warn(info->dev, "failed to detect cable state\n"); | |
509 | } | |
510 | ||
914b881f CC |
511 | static void sm5502_init_dev_type(struct sm5502_muic_info *info) |
512 | { | |
513 | unsigned int reg_data, vendor_id, version_id; | |
514 | int i, ret; | |
515 | ||
516 | /* To test I2C, Print version_id and vendor_id of SM5502 */ | |
517 | ret = regmap_read(info->regmap, SM5502_REG_DEVICE_ID, ®_data); | |
518 | if (ret) { | |
519 | dev_err(info->dev, | |
520 | "failed to read DEVICE_ID register: %d\n", ret); | |
521 | return; | |
522 | } | |
523 | ||
524 | vendor_id = ((reg_data & SM5502_REG_DEVICE_ID_VENDOR_MASK) >> | |
525 | SM5502_REG_DEVICE_ID_VENDOR_SHIFT); | |
526 | version_id = ((reg_data & SM5502_REG_DEVICE_ID_VERSION_MASK) >> | |
527 | SM5502_REG_DEVICE_ID_VERSION_SHIFT); | |
528 | ||
529 | dev_info(info->dev, "Device type: version: 0x%x, vendor: 0x%x\n", | |
530 | version_id, vendor_id); | |
531 | ||
532 | /* Initiazle the register of SM5502 device to bring-up */ | |
533 | for (i = 0; i < info->num_reg_data; i++) { | |
534 | unsigned int val = 0; | |
535 | ||
536 | if (!info->reg_data[i].invert) | |
537 | val |= ~info->reg_data[i].val; | |
538 | else | |
539 | val = info->reg_data[i].val; | |
540 | regmap_write(info->regmap, info->reg_data[i].reg, val); | |
541 | } | |
542 | } | |
543 | ||
544 | static int sm5022_muic_i2c_probe(struct i2c_client *i2c, | |
545 | const struct i2c_device_id *id) | |
546 | { | |
547 | struct device_node *np = i2c->dev.of_node; | |
548 | struct sm5502_muic_info *info; | |
549 | int i, ret, irq_flags; | |
550 | ||
551 | if (!np) | |
552 | return -EINVAL; | |
553 | ||
554 | info = devm_kzalloc(&i2c->dev, sizeof(*info), GFP_KERNEL); | |
555 | if (!info) | |
556 | return -ENOMEM; | |
557 | i2c_set_clientdata(i2c, info); | |
558 | ||
559 | info->dev = &i2c->dev; | |
560 | info->i2c = i2c; | |
561 | info->irq = i2c->irq; | |
562 | info->muic_irqs = sm5502_muic_irqs; | |
563 | info->num_muic_irqs = ARRAY_SIZE(sm5502_muic_irqs); | |
564 | info->reg_data = sm5502_reg_data; | |
565 | info->num_reg_data = ARRAY_SIZE(sm5502_reg_data); | |
566 | ||
567 | mutex_init(&info->mutex); | |
568 | ||
569 | INIT_WORK(&info->irq_work, sm5502_muic_irq_work); | |
570 | ||
571 | info->regmap = devm_regmap_init_i2c(i2c, &sm5502_muic_regmap_config); | |
572 | if (IS_ERR(info->regmap)) { | |
573 | ret = PTR_ERR(info->regmap); | |
574 | dev_err(info->dev, "failed to allocate register map: %d\n", | |
575 | ret); | |
576 | return ret; | |
577 | } | |
578 | ||
579 | /* Support irq domain for SM5502 MUIC device */ | |
580 | irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED; | |
581 | ret = regmap_add_irq_chip(info->regmap, info->irq, irq_flags, 0, | |
582 | &sm5502_muic_irq_chip, &info->irq_data); | |
583 | if (ret != 0) { | |
584 | dev_err(info->dev, "failed to request IRQ %d: %d\n", | |
585 | info->irq, ret); | |
586 | return ret; | |
587 | } | |
588 | ||
589 | for (i = 0; i < info->num_muic_irqs; i++) { | |
590 | struct muic_irq *muic_irq = &info->muic_irqs[i]; | |
363b3891 | 591 | int virq = 0; |
914b881f CC |
592 | |
593 | virq = regmap_irq_get_virq(info->irq_data, muic_irq->irq); | |
594 | if (virq <= 0) | |
595 | return -EINVAL; | |
596 | muic_irq->virq = virq; | |
597 | ||
598 | ret = devm_request_threaded_irq(info->dev, virq, NULL, | |
599 | sm5502_muic_irq_handler, | |
600 | IRQF_NO_SUSPEND, | |
601 | muic_irq->name, info); | |
602 | if (ret) { | |
fbae30d8 CC |
603 | dev_err(info->dev, |
604 | "failed: irq request (IRQ: %d, error :%d)\n", | |
605 | muic_irq->irq, ret); | |
914b881f CC |
606 | return ret; |
607 | } | |
608 | } | |
609 | ||
610 | /* Allocate extcon device */ | |
611 | info->edev = devm_extcon_dev_allocate(info->dev, sm5502_extcon_cable); | |
612 | if (IS_ERR(info->edev)) { | |
613 | dev_err(info->dev, "failed to allocate memory for extcon\n"); | |
614 | return -ENOMEM; | |
615 | } | |
914b881f CC |
616 | |
617 | /* Register extcon device */ | |
618 | ret = devm_extcon_dev_register(info->dev, info->edev); | |
619 | if (ret) { | |
620 | dev_err(info->dev, "failed to register extcon device\n"); | |
621 | return ret; | |
622 | } | |
623 | ||
e1954452 CC |
624 | /* |
625 | * Detect accessory after completing the initialization of platform | |
626 | * | |
627 | * - Use delayed workqueue to detect cable state and then | |
628 | * notify cable state to notifiee/platform through uevent. | |
629 | * After completing the booting of platform, the extcon provider | |
630 | * driver should notify cable state to upper layer. | |
631 | */ | |
632 | INIT_DELAYED_WORK(&info->wq_detcable, sm5502_muic_detect_cable_wq); | |
633 | queue_delayed_work(system_power_efficient_wq, &info->wq_detcable, | |
634 | msecs_to_jiffies(DELAY_MS_DEFAULT)); | |
635 | ||
914b881f CC |
636 | /* Initialize SM5502 device and print vendor id and version id */ |
637 | sm5502_init_dev_type(info); | |
638 | ||
639 | return 0; | |
640 | } | |
641 | ||
642 | static int sm5502_muic_i2c_remove(struct i2c_client *i2c) | |
643 | { | |
644 | struct sm5502_muic_info *info = i2c_get_clientdata(i2c); | |
645 | ||
646 | regmap_del_irq_chip(info->irq, info->irq_data); | |
647 | ||
648 | return 0; | |
649 | } | |
650 | ||
34825e51 | 651 | static const struct of_device_id sm5502_dt_match[] = { |
914b881f CC |
652 | { .compatible = "siliconmitus,sm5502-muic" }, |
653 | { }, | |
654 | }; | |
ff612f91 | 655 | MODULE_DEVICE_TABLE(of, sm5502_dt_match); |
914b881f CC |
656 | |
657 | #ifdef CONFIG_PM_SLEEP | |
658 | static int sm5502_muic_suspend(struct device *dev) | |
659 | { | |
d5859342 | 660 | struct i2c_client *i2c = to_i2c_client(dev); |
914b881f CC |
661 | struct sm5502_muic_info *info = i2c_get_clientdata(i2c); |
662 | ||
663 | enable_irq_wake(info->irq); | |
664 | ||
665 | return 0; | |
666 | } | |
667 | ||
668 | static int sm5502_muic_resume(struct device *dev) | |
669 | { | |
d5859342 | 670 | struct i2c_client *i2c = to_i2c_client(dev); |
914b881f CC |
671 | struct sm5502_muic_info *info = i2c_get_clientdata(i2c); |
672 | ||
673 | disable_irq_wake(info->irq); | |
674 | ||
675 | return 0; | |
676 | } | |
677 | #endif | |
678 | ||
679 | static SIMPLE_DEV_PM_OPS(sm5502_muic_pm_ops, | |
680 | sm5502_muic_suspend, sm5502_muic_resume); | |
681 | ||
682 | static const struct i2c_device_id sm5502_i2c_id[] = { | |
683 | { "sm5502", TYPE_SM5502 }, | |
684 | { } | |
685 | }; | |
686 | MODULE_DEVICE_TABLE(i2c, sm5502_i2c_id); | |
687 | ||
688 | static struct i2c_driver sm5502_muic_i2c_driver = { | |
689 | .driver = { | |
690 | .name = "sm5502", | |
914b881f CC |
691 | .pm = &sm5502_muic_pm_ops, |
692 | .of_match_table = sm5502_dt_match, | |
693 | }, | |
694 | .probe = sm5022_muic_i2c_probe, | |
695 | .remove = sm5502_muic_i2c_remove, | |
696 | .id_table = sm5502_i2c_id, | |
697 | }; | |
698 | ||
699 | static int __init sm5502_muic_i2c_init(void) | |
700 | { | |
701 | return i2c_add_driver(&sm5502_muic_i2c_driver); | |
702 | } | |
703 | subsys_initcall(sm5502_muic_i2c_init); | |
704 | ||
705 | MODULE_DESCRIPTION("Silicon Mitus SM5502 Extcon driver"); | |
706 | MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>"); | |
707 | MODULE_LICENSE("GPL"); |