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914b881f CC |
1 | /* |
2 | * extcon-sm5502.c - Silicon Mitus SM5502 extcon drvier 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. | |
914b881f CC |
11 | */ |
12 | ||
13 | #include <linux/err.h> | |
14 | #include <linux/i2c.h> | |
914b881f CC |
15 | #include <linux/interrupt.h> |
16 | #include <linux/irqdomain.h> | |
17 | #include <linux/kernel.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/platform_device.h> | |
20 | #include <linux/regmap.h> | |
21 | #include <linux/slab.h> | |
22 | #include <linux/extcon.h> | |
ca2a07e4 CC |
23 | |
24 | #include "extcon-sm5502.h" | |
914b881f | 25 | |
e1954452 CC |
26 | #define DELAY_MS_DEFAULT 17000 /* unit: millisecond */ |
27 | ||
914b881f CC |
28 | struct muic_irq { |
29 | unsigned int irq; | |
30 | const char *name; | |
31 | unsigned int virq; | |
32 | }; | |
33 | ||
34 | struct reg_data { | |
35 | u8 reg; | |
36 | unsigned int val; | |
37 | bool invert; | |
38 | }; | |
39 | ||
40 | struct sm5502_muic_info { | |
41 | struct device *dev; | |
42 | struct extcon_dev *edev; | |
43 | ||
44 | struct i2c_client *i2c; | |
45 | struct regmap *regmap; | |
46 | ||
47 | struct regmap_irq_chip_data *irq_data; | |
48 | struct muic_irq *muic_irqs; | |
49 | unsigned int num_muic_irqs; | |
50 | int irq; | |
51 | bool irq_attach; | |
52 | bool irq_detach; | |
53 | struct work_struct irq_work; | |
54 | ||
55 | struct reg_data *reg_data; | |
56 | unsigned int num_reg_data; | |
57 | ||
58 | struct mutex mutex; | |
e1954452 CC |
59 | |
60 | /* | |
61 | * Use delayed workqueue to detect cable state and then | |
62 | * notify cable state to notifiee/platform through uevent. | |
63 | * After completing the booting of platform, the extcon provider | |
64 | * driver should notify cable state to upper layer. | |
65 | */ | |
66 | struct delayed_work wq_detcable; | |
914b881f CC |
67 | }; |
68 | ||
69 | /* Default value of SM5502 register to bring up MUIC device. */ | |
70 | static struct reg_data sm5502_reg_data[] = { | |
71 | { | |
72 | .reg = SM5502_REG_CONTROL, | |
73 | .val = SM5502_REG_CONTROL_MASK_INT_MASK, | |
74 | .invert = false, | |
75 | }, { | |
76 | .reg = SM5502_REG_INTMASK1, | |
77 | .val = SM5502_REG_INTM1_KP_MASK | |
78 | | SM5502_REG_INTM1_LKP_MASK | |
79 | | SM5502_REG_INTM1_LKR_MASK, | |
80 | .invert = true, | |
81 | }, { | |
82 | .reg = SM5502_REG_INTMASK2, | |
83 | .val = SM5502_REG_INTM2_VBUS_DET_MASK | |
84 | | SM5502_REG_INTM2_REV_ACCE_MASK | |
85 | | SM5502_REG_INTM2_ADC_CHG_MASK | |
86 | | SM5502_REG_INTM2_STUCK_KEY_MASK | |
87 | | SM5502_REG_INTM2_STUCK_KEY_RCV_MASK | |
88 | | SM5502_REG_INTM2_MHL_MASK, | |
89 | .invert = true, | |
90 | }, | |
91 | { } | |
92 | }; | |
93 | ||
94 | /* List of detectable cables */ | |
73b6ecdb | 95 | static const unsigned int sm5502_extcon_cable[] = { |
2a9de9c0 CC |
96 | EXTCON_USB, |
97 | EXTCON_USB_HOST, | |
8b45b6a0 | 98 | EXTCON_CHG_USB_SDP, |
11eecf91 | 99 | EXTCON_CHG_USB_DCP, |
2a9de9c0 | 100 | EXTCON_NONE, |
914b881f CC |
101 | }; |
102 | ||
103 | /* Define supported accessory type */ | |
104 | enum sm5502_muic_acc_type { | |
105 | SM5502_MUIC_ADC_GROUND = 0x0, | |
106 | SM5502_MUIC_ADC_SEND_END_BUTTON, | |
107 | SM5502_MUIC_ADC_REMOTE_S1_BUTTON, | |
108 | SM5502_MUIC_ADC_REMOTE_S2_BUTTON, | |
109 | SM5502_MUIC_ADC_REMOTE_S3_BUTTON, | |
110 | SM5502_MUIC_ADC_REMOTE_S4_BUTTON, | |
111 | SM5502_MUIC_ADC_REMOTE_S5_BUTTON, | |
112 | SM5502_MUIC_ADC_REMOTE_S6_BUTTON, | |
113 | SM5502_MUIC_ADC_REMOTE_S7_BUTTON, | |
114 | SM5502_MUIC_ADC_REMOTE_S8_BUTTON, | |
115 | SM5502_MUIC_ADC_REMOTE_S9_BUTTON, | |
116 | SM5502_MUIC_ADC_REMOTE_S10_BUTTON, | |
117 | SM5502_MUIC_ADC_REMOTE_S11_BUTTON, | |
118 | SM5502_MUIC_ADC_REMOTE_S12_BUTTON, | |
119 | SM5502_MUIC_ADC_RESERVED_ACC_1, | |
120 | SM5502_MUIC_ADC_RESERVED_ACC_2, | |
121 | SM5502_MUIC_ADC_RESERVED_ACC_3, | |
122 | SM5502_MUIC_ADC_RESERVED_ACC_4, | |
123 | SM5502_MUIC_ADC_RESERVED_ACC_5, | |
124 | SM5502_MUIC_ADC_AUDIO_TYPE2, | |
125 | SM5502_MUIC_ADC_PHONE_POWERED_DEV, | |
126 | SM5502_MUIC_ADC_TTY_CONVERTER, | |
127 | SM5502_MUIC_ADC_UART_CABLE, | |
128 | SM5502_MUIC_ADC_TYPE1_CHARGER, | |
129 | SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB, | |
130 | SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB, | |
131 | SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE, | |
132 | SM5502_MUIC_ADC_TYPE2_CHARGER, | |
133 | SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART, | |
134 | SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART, | |
135 | SM5502_MUIC_ADC_AUDIO_TYPE1, | |
136 | SM5502_MUIC_ADC_OPEN = 0x1f, | |
137 | ||
138 | /* The below accessories have same ADC value (0x1f or 0x1e). | |
139 | So, Device type1 is used to separate specific accessory. */ | |
140 | /* |---------|--ADC| */ | |
141 | /* | [7:5]|[4:0]| */ | |
142 | SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE = 0x3e, /* | 001|11110| */ | |
143 | SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END = 0x5e, /* | 010|11110| */ | |
144 | /* |Dev Type1|--ADC| */ | |
145 | SM5502_MUIC_ADC_OPEN_USB = 0x5f, /* | 010|11111| */ | |
146 | SM5502_MUIC_ADC_OPEN_TA = 0xdf, /* | 110|11111| */ | |
147 | SM5502_MUIC_ADC_OPEN_USB_OTG = 0xff, /* | 111|11111| */ | |
148 | }; | |
149 | ||
150 | /* List of supported interrupt for SM5502 */ | |
151 | static struct muic_irq sm5502_muic_irqs[] = { | |
152 | { SM5502_IRQ_INT1_ATTACH, "muic-attach" }, | |
153 | { SM5502_IRQ_INT1_DETACH, "muic-detach" }, | |
154 | { SM5502_IRQ_INT1_KP, "muic-kp" }, | |
155 | { SM5502_IRQ_INT1_LKP, "muic-lkp" }, | |
156 | { SM5502_IRQ_INT1_LKR, "muic-lkr" }, | |
157 | { SM5502_IRQ_INT1_OVP_EVENT, "muic-ovp-event" }, | |
158 | { SM5502_IRQ_INT1_OCP_EVENT, "muic-ocp-event" }, | |
159 | { SM5502_IRQ_INT1_OVP_OCP_DIS, "muic-ovp-ocp-dis" }, | |
160 | { SM5502_IRQ_INT2_VBUS_DET, "muic-vbus-det" }, | |
161 | { SM5502_IRQ_INT2_REV_ACCE, "muic-rev-acce" }, | |
162 | { SM5502_IRQ_INT2_ADC_CHG, "muic-adc-chg" }, | |
163 | { SM5502_IRQ_INT2_STUCK_KEY, "muic-stuck-key" }, | |
164 | { SM5502_IRQ_INT2_STUCK_KEY_RCV, "muic-stuck-key-rcv" }, | |
165 | { SM5502_IRQ_INT2_MHL, "muic-mhl" }, | |
166 | }; | |
167 | ||
168 | /* Define interrupt list of SM5502 to register regmap_irq */ | |
169 | static const struct regmap_irq sm5502_irqs[] = { | |
170 | /* INT1 interrupts */ | |
171 | { .reg_offset = 0, .mask = SM5502_IRQ_INT1_ATTACH_MASK, }, | |
172 | { .reg_offset = 0, .mask = SM5502_IRQ_INT1_DETACH_MASK, }, | |
173 | { .reg_offset = 0, .mask = SM5502_IRQ_INT1_KP_MASK, }, | |
174 | { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKP_MASK, }, | |
175 | { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKR_MASK, }, | |
176 | { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_EVENT_MASK, }, | |
177 | { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OCP_EVENT_MASK, }, | |
178 | { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_OCP_DIS_MASK, }, | |
179 | ||
180 | /* INT2 interrupts */ | |
181 | { .reg_offset = 1, .mask = SM5502_IRQ_INT2_VBUS_DET_MASK,}, | |
182 | { .reg_offset = 1, .mask = SM5502_IRQ_INT2_REV_ACCE_MASK, }, | |
183 | { .reg_offset = 1, .mask = SM5502_IRQ_INT2_ADC_CHG_MASK, }, | |
184 | { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_MASK, }, | |
185 | { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_RCV_MASK, }, | |
186 | { .reg_offset = 1, .mask = SM5502_IRQ_INT2_MHL_MASK, }, | |
187 | }; | |
188 | ||
189 | static const struct regmap_irq_chip sm5502_muic_irq_chip = { | |
190 | .name = "sm5502", | |
191 | .status_base = SM5502_REG_INT1, | |
192 | .mask_base = SM5502_REG_INTMASK1, | |
193 | .mask_invert = false, | |
194 | .num_regs = 2, | |
195 | .irqs = sm5502_irqs, | |
196 | .num_irqs = ARRAY_SIZE(sm5502_irqs), | |
197 | }; | |
198 | ||
199 | /* Define regmap configuration of SM5502 for I2C communication */ | |
200 | static bool sm5502_muic_volatile_reg(struct device *dev, unsigned int reg) | |
201 | { | |
202 | switch (reg) { | |
203 | case SM5502_REG_INTMASK1: | |
204 | case SM5502_REG_INTMASK2: | |
205 | return true; | |
206 | default: | |
207 | break; | |
208 | } | |
209 | return false; | |
210 | } | |
211 | ||
212 | static const struct regmap_config sm5502_muic_regmap_config = { | |
213 | .reg_bits = 8, | |
214 | .val_bits = 8, | |
215 | .volatile_reg = sm5502_muic_volatile_reg, | |
216 | .max_register = SM5502_REG_END, | |
217 | }; | |
218 | ||
a75fed2e CC |
219 | /* Change DM_CON/DP_CON/VBUSIN switch according to cable type */ |
220 | static int sm5502_muic_set_path(struct sm5502_muic_info *info, | |
221 | unsigned int con_sw, unsigned int vbus_sw, | |
222 | bool attached) | |
223 | { | |
224 | int ret; | |
225 | ||
226 | if (!attached) { | |
227 | con_sw = DM_DP_SWITCH_OPEN; | |
228 | vbus_sw = VBUSIN_SWITCH_OPEN; | |
229 | } | |
230 | ||
231 | switch (con_sw) { | |
232 | case DM_DP_SWITCH_OPEN: | |
233 | case DM_DP_SWITCH_USB: | |
234 | case DM_DP_SWITCH_AUDIO: | |
235 | case DM_DP_SWITCH_UART: | |
236 | ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1, | |
237 | SM5502_REG_MANUAL_SW1_DP_MASK | | |
238 | SM5502_REG_MANUAL_SW1_DM_MASK, | |
239 | con_sw); | |
240 | if (ret < 0) { | |
241 | dev_err(info->dev, | |
242 | "cannot update DM_CON/DP_CON switch\n"); | |
243 | return ret; | |
244 | } | |
245 | break; | |
246 | default: | |
247 | dev_err(info->dev, "Unknown DM_CON/DP_CON switch type (%d)\n", | |
248 | con_sw); | |
249 | return -EINVAL; | |
250 | }; | |
251 | ||
252 | switch (vbus_sw) { | |
253 | case VBUSIN_SWITCH_OPEN: | |
254 | case VBUSIN_SWITCH_VBUSOUT: | |
255 | case VBUSIN_SWITCH_MIC: | |
256 | case VBUSIN_SWITCH_VBUSOUT_WITH_USB: | |
257 | ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1, | |
258 | SM5502_REG_MANUAL_SW1_VBUSIN_MASK, | |
259 | vbus_sw); | |
260 | if (ret < 0) { | |
261 | dev_err(info->dev, | |
262 | "cannot update VBUSIN switch\n"); | |
263 | return ret; | |
264 | } | |
265 | break; | |
266 | default: | |
267 | dev_err(info->dev, "Unknown VBUS switch type (%d)\n", vbus_sw); | |
268 | return -EINVAL; | |
269 | }; | |
270 | ||
271 | return 0; | |
272 | } | |
273 | ||
914b881f CC |
274 | /* Return cable type of attached or detached accessories */ |
275 | static unsigned int sm5502_muic_get_cable_type(struct sm5502_muic_info *info) | |
276 | { | |
277 | unsigned int cable_type = -1, adc, dev_type1; | |
278 | int ret; | |
279 | ||
280 | /* Read ADC value according to external cable or button */ | |
281 | ret = regmap_read(info->regmap, SM5502_REG_ADC, &adc); | |
282 | if (ret) { | |
283 | dev_err(info->dev, "failed to read ADC register\n"); | |
284 | return ret; | |
285 | } | |
286 | ||
287 | /* | |
288 | * If ADC is SM5502_MUIC_ADC_GROUND(0x0), external cable hasn't | |
289 | * connected with to MUIC device. | |
290 | */ | |
0ccc7955 | 291 | cable_type = adc & SM5502_REG_ADC_MASK; |
914b881f CC |
292 | if (cable_type == SM5502_MUIC_ADC_GROUND) |
293 | return SM5502_MUIC_ADC_GROUND; | |
294 | ||
295 | switch (cable_type) { | |
296 | case SM5502_MUIC_ADC_GROUND: | |
297 | case SM5502_MUIC_ADC_SEND_END_BUTTON: | |
298 | case SM5502_MUIC_ADC_REMOTE_S1_BUTTON: | |
299 | case SM5502_MUIC_ADC_REMOTE_S2_BUTTON: | |
300 | case SM5502_MUIC_ADC_REMOTE_S3_BUTTON: | |
301 | case SM5502_MUIC_ADC_REMOTE_S4_BUTTON: | |
302 | case SM5502_MUIC_ADC_REMOTE_S5_BUTTON: | |
303 | case SM5502_MUIC_ADC_REMOTE_S6_BUTTON: | |
304 | case SM5502_MUIC_ADC_REMOTE_S7_BUTTON: | |
305 | case SM5502_MUIC_ADC_REMOTE_S8_BUTTON: | |
306 | case SM5502_MUIC_ADC_REMOTE_S9_BUTTON: | |
307 | case SM5502_MUIC_ADC_REMOTE_S10_BUTTON: | |
308 | case SM5502_MUIC_ADC_REMOTE_S11_BUTTON: | |
309 | case SM5502_MUIC_ADC_REMOTE_S12_BUTTON: | |
310 | case SM5502_MUIC_ADC_RESERVED_ACC_1: | |
311 | case SM5502_MUIC_ADC_RESERVED_ACC_2: | |
312 | case SM5502_MUIC_ADC_RESERVED_ACC_3: | |
313 | case SM5502_MUIC_ADC_RESERVED_ACC_4: | |
314 | case SM5502_MUIC_ADC_RESERVED_ACC_5: | |
315 | case SM5502_MUIC_ADC_AUDIO_TYPE2: | |
316 | case SM5502_MUIC_ADC_PHONE_POWERED_DEV: | |
317 | case SM5502_MUIC_ADC_TTY_CONVERTER: | |
318 | case SM5502_MUIC_ADC_UART_CABLE: | |
319 | case SM5502_MUIC_ADC_TYPE1_CHARGER: | |
320 | case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB: | |
321 | case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB: | |
322 | case SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE: | |
323 | case SM5502_MUIC_ADC_TYPE2_CHARGER: | |
324 | case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART: | |
325 | case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART: | |
326 | break; | |
327 | case SM5502_MUIC_ADC_AUDIO_TYPE1: | |
328 | /* | |
329 | * Check whether cable type is | |
330 | * SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE | |
331 | * or SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END | |
332 | * by using Button event. | |
333 | */ | |
334 | break; | |
335 | case SM5502_MUIC_ADC_OPEN: | |
336 | ret = regmap_read(info->regmap, SM5502_REG_DEV_TYPE1, | |
337 | &dev_type1); | |
338 | if (ret) { | |
339 | dev_err(info->dev, "failed to read DEV_TYPE1 reg\n"); | |
340 | return ret; | |
341 | } | |
342 | ||
343 | switch (dev_type1) { | |
344 | case SM5502_REG_DEV_TYPE1_USB_SDP_MASK: | |
345 | cable_type = SM5502_MUIC_ADC_OPEN_USB; | |
346 | break; | |
347 | case SM5502_REG_DEV_TYPE1_DEDICATED_CHG_MASK: | |
348 | cable_type = SM5502_MUIC_ADC_OPEN_TA; | |
349 | break; | |
350 | case SM5502_REG_DEV_TYPE1_USB_OTG_MASK: | |
351 | cable_type = SM5502_MUIC_ADC_OPEN_USB_OTG; | |
352 | break; | |
353 | default: | |
354 | dev_dbg(info->dev, | |
34825e51 CC |
355 | "cannot identify the cable type: adc(0x%x)\n", |
356 | adc); | |
914b881f CC |
357 | return -EINVAL; |
358 | }; | |
359 | break; | |
360 | default: | |
361 | dev_err(info->dev, | |
362 | "failed to identify the cable type: adc(0x%x)\n", adc); | |
363 | return -EINVAL; | |
364 | }; | |
365 | ||
366 | return cable_type; | |
367 | } | |
368 | ||
369 | static int sm5502_muic_cable_handler(struct sm5502_muic_info *info, | |
370 | bool attached) | |
371 | { | |
372 | static unsigned int prev_cable_type = SM5502_MUIC_ADC_GROUND; | |
914b881f | 373 | unsigned int cable_type = SM5502_MUIC_ADC_GROUND; |
a75fed2e CC |
374 | unsigned int con_sw = DM_DP_SWITCH_OPEN; |
375 | unsigned int vbus_sw = VBUSIN_SWITCH_OPEN; | |
73b6ecdb | 376 | unsigned int id; |
a75fed2e | 377 | int ret; |
914b881f | 378 | |
914b881f CC |
379 | /* Get the type of attached or detached cable */ |
380 | if (attached) | |
381 | cable_type = sm5502_muic_get_cable_type(info); | |
fbae30d8 | 382 | else |
914b881f CC |
383 | cable_type = prev_cable_type; |
384 | prev_cable_type = cable_type; | |
385 | ||
386 | switch (cable_type) { | |
387 | case SM5502_MUIC_ADC_OPEN_USB: | |
2a9de9c0 | 388 | id = EXTCON_USB; |
a75fed2e CC |
389 | con_sw = DM_DP_SWITCH_USB; |
390 | vbus_sw = VBUSIN_SWITCH_VBUSOUT_WITH_USB; | |
914b881f CC |
391 | break; |
392 | case SM5502_MUIC_ADC_OPEN_TA: | |
11eecf91 | 393 | id = EXTCON_CHG_USB_DCP; |
a75fed2e CC |
394 | con_sw = DM_DP_SWITCH_OPEN; |
395 | vbus_sw = VBUSIN_SWITCH_VBUSOUT; | |
914b881f CC |
396 | break; |
397 | case SM5502_MUIC_ADC_OPEN_USB_OTG: | |
2a9de9c0 | 398 | id = EXTCON_USB_HOST; |
a75fed2e CC |
399 | con_sw = DM_DP_SWITCH_USB; |
400 | vbus_sw = VBUSIN_SWITCH_OPEN; | |
e1954452 | 401 | break; |
914b881f CC |
402 | default: |
403 | dev_dbg(info->dev, | |
404 | "cannot handle this cable_type (0x%x)\n", cable_type); | |
405 | return 0; | |
406 | }; | |
407 | ||
a75fed2e CC |
408 | /* Change internal hardware path(DM_CON/DP_CON, VBUSIN) */ |
409 | ret = sm5502_muic_set_path(info, con_sw, vbus_sw, attached); | |
410 | if (ret < 0) | |
411 | return ret; | |
412 | ||
413 | /* Change the state of external accessory */ | |
2a9de9c0 | 414 | extcon_set_cable_state_(info->edev, id, attached); |
8b45b6a0 CC |
415 | if (id == EXTCON_USB) |
416 | extcon_set_cable_state_(info->edev, EXTCON_CHG_USB_SDP, | |
417 | attached); | |
914b881f CC |
418 | |
419 | return 0; | |
420 | } | |
421 | ||
422 | static void sm5502_muic_irq_work(struct work_struct *work) | |
423 | { | |
424 | struct sm5502_muic_info *info = container_of(work, | |
425 | struct sm5502_muic_info, irq_work); | |
426 | int ret = 0; | |
427 | ||
428 | if (!info->edev) | |
429 | return; | |
430 | ||
431 | mutex_lock(&info->mutex); | |
432 | ||
433 | /* Detect attached or detached cables */ | |
434 | if (info->irq_attach) { | |
435 | ret = sm5502_muic_cable_handler(info, true); | |
436 | info->irq_attach = false; | |
437 | } | |
438 | if (info->irq_detach) { | |
439 | ret = sm5502_muic_cable_handler(info, false); | |
440 | info->irq_detach = false; | |
441 | } | |
442 | ||
443 | if (ret < 0) | |
444 | dev_err(info->dev, "failed to handle MUIC interrupt\n"); | |
445 | ||
446 | mutex_unlock(&info->mutex); | |
914b881f CC |
447 | } |
448 | ||
449 | /* | |
450 | * Sets irq_attach or irq_detach in sm5502_muic_info and returns 0. | |
451 | * Returns -ESRCH if irq_type does not match registered IRQ for this dev type. | |
452 | */ | |
453 | static int sm5502_parse_irq(struct sm5502_muic_info *info, int irq_type) | |
454 | { | |
455 | switch (irq_type) { | |
456 | case SM5502_IRQ_INT1_ATTACH: | |
457 | info->irq_attach = true; | |
458 | break; | |
459 | case SM5502_IRQ_INT1_DETACH: | |
460 | info->irq_detach = true; | |
461 | break; | |
462 | case SM5502_IRQ_INT1_KP: | |
463 | case SM5502_IRQ_INT1_LKP: | |
464 | case SM5502_IRQ_INT1_LKR: | |
465 | case SM5502_IRQ_INT1_OVP_EVENT: | |
466 | case SM5502_IRQ_INT1_OCP_EVENT: | |
467 | case SM5502_IRQ_INT1_OVP_OCP_DIS: | |
468 | case SM5502_IRQ_INT2_VBUS_DET: | |
469 | case SM5502_IRQ_INT2_REV_ACCE: | |
470 | case SM5502_IRQ_INT2_ADC_CHG: | |
471 | case SM5502_IRQ_INT2_STUCK_KEY: | |
472 | case SM5502_IRQ_INT2_STUCK_KEY_RCV: | |
473 | case SM5502_IRQ_INT2_MHL: | |
474 | default: | |
475 | break; | |
476 | } | |
477 | ||
478 | return 0; | |
479 | } | |
480 | ||
481 | static irqreturn_t sm5502_muic_irq_handler(int irq, void *data) | |
482 | { | |
483 | struct sm5502_muic_info *info = data; | |
484 | int i, irq_type = -1, ret; | |
485 | ||
486 | for (i = 0; i < info->num_muic_irqs; i++) | |
487 | if (irq == info->muic_irqs[i].virq) | |
488 | irq_type = info->muic_irqs[i].irq; | |
489 | ||
490 | ret = sm5502_parse_irq(info, irq_type); | |
491 | if (ret < 0) { | |
492 | dev_warn(info->dev, "cannot handle is interrupt:%d\n", | |
493 | irq_type); | |
494 | return IRQ_HANDLED; | |
495 | } | |
496 | schedule_work(&info->irq_work); | |
497 | ||
498 | return IRQ_HANDLED; | |
499 | } | |
500 | ||
e1954452 CC |
501 | static void sm5502_muic_detect_cable_wq(struct work_struct *work) |
502 | { | |
503 | struct sm5502_muic_info *info = container_of(to_delayed_work(work), | |
504 | struct sm5502_muic_info, wq_detcable); | |
505 | int ret; | |
506 | ||
507 | /* Notify the state of connector cable or not */ | |
508 | ret = sm5502_muic_cable_handler(info, true); | |
509 | if (ret < 0) | |
510 | dev_warn(info->dev, "failed to detect cable state\n"); | |
511 | } | |
512 | ||
914b881f CC |
513 | static void sm5502_init_dev_type(struct sm5502_muic_info *info) |
514 | { | |
515 | unsigned int reg_data, vendor_id, version_id; | |
516 | int i, ret; | |
517 | ||
518 | /* To test I2C, Print version_id and vendor_id of SM5502 */ | |
519 | ret = regmap_read(info->regmap, SM5502_REG_DEVICE_ID, ®_data); | |
520 | if (ret) { | |
521 | dev_err(info->dev, | |
522 | "failed to read DEVICE_ID register: %d\n", ret); | |
523 | return; | |
524 | } | |
525 | ||
526 | vendor_id = ((reg_data & SM5502_REG_DEVICE_ID_VENDOR_MASK) >> | |
527 | SM5502_REG_DEVICE_ID_VENDOR_SHIFT); | |
528 | version_id = ((reg_data & SM5502_REG_DEVICE_ID_VERSION_MASK) >> | |
529 | SM5502_REG_DEVICE_ID_VERSION_SHIFT); | |
530 | ||
531 | dev_info(info->dev, "Device type: version: 0x%x, vendor: 0x%x\n", | |
532 | version_id, vendor_id); | |
533 | ||
534 | /* Initiazle the register of SM5502 device to bring-up */ | |
535 | for (i = 0; i < info->num_reg_data; i++) { | |
536 | unsigned int val = 0; | |
537 | ||
538 | if (!info->reg_data[i].invert) | |
539 | val |= ~info->reg_data[i].val; | |
540 | else | |
541 | val = info->reg_data[i].val; | |
542 | regmap_write(info->regmap, info->reg_data[i].reg, val); | |
543 | } | |
544 | } | |
545 | ||
546 | static int sm5022_muic_i2c_probe(struct i2c_client *i2c, | |
547 | const struct i2c_device_id *id) | |
548 | { | |
549 | struct device_node *np = i2c->dev.of_node; | |
550 | struct sm5502_muic_info *info; | |
551 | int i, ret, irq_flags; | |
552 | ||
553 | if (!np) | |
554 | return -EINVAL; | |
555 | ||
556 | info = devm_kzalloc(&i2c->dev, sizeof(*info), GFP_KERNEL); | |
557 | if (!info) | |
558 | return -ENOMEM; | |
559 | i2c_set_clientdata(i2c, info); | |
560 | ||
561 | info->dev = &i2c->dev; | |
562 | info->i2c = i2c; | |
563 | info->irq = i2c->irq; | |
564 | info->muic_irqs = sm5502_muic_irqs; | |
565 | info->num_muic_irqs = ARRAY_SIZE(sm5502_muic_irqs); | |
566 | info->reg_data = sm5502_reg_data; | |
567 | info->num_reg_data = ARRAY_SIZE(sm5502_reg_data); | |
568 | ||
569 | mutex_init(&info->mutex); | |
570 | ||
571 | INIT_WORK(&info->irq_work, sm5502_muic_irq_work); | |
572 | ||
573 | info->regmap = devm_regmap_init_i2c(i2c, &sm5502_muic_regmap_config); | |
574 | if (IS_ERR(info->regmap)) { | |
575 | ret = PTR_ERR(info->regmap); | |
576 | dev_err(info->dev, "failed to allocate register map: %d\n", | |
577 | ret); | |
578 | return ret; | |
579 | } | |
580 | ||
581 | /* Support irq domain for SM5502 MUIC device */ | |
582 | irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED; | |
583 | ret = regmap_add_irq_chip(info->regmap, info->irq, irq_flags, 0, | |
584 | &sm5502_muic_irq_chip, &info->irq_data); | |
585 | if (ret != 0) { | |
586 | dev_err(info->dev, "failed to request IRQ %d: %d\n", | |
587 | info->irq, ret); | |
588 | return ret; | |
589 | } | |
590 | ||
591 | for (i = 0; i < info->num_muic_irqs; i++) { | |
592 | struct muic_irq *muic_irq = &info->muic_irqs[i]; | |
363b3891 | 593 | int virq = 0; |
914b881f CC |
594 | |
595 | virq = regmap_irq_get_virq(info->irq_data, muic_irq->irq); | |
596 | if (virq <= 0) | |
597 | return -EINVAL; | |
598 | muic_irq->virq = virq; | |
599 | ||
600 | ret = devm_request_threaded_irq(info->dev, virq, NULL, | |
601 | sm5502_muic_irq_handler, | |
602 | IRQF_NO_SUSPEND, | |
603 | muic_irq->name, info); | |
604 | if (ret) { | |
fbae30d8 CC |
605 | dev_err(info->dev, |
606 | "failed: irq request (IRQ: %d, error :%d)\n", | |
607 | muic_irq->irq, ret); | |
914b881f CC |
608 | return ret; |
609 | } | |
610 | } | |
611 | ||
612 | /* Allocate extcon device */ | |
613 | info->edev = devm_extcon_dev_allocate(info->dev, sm5502_extcon_cable); | |
614 | if (IS_ERR(info->edev)) { | |
615 | dev_err(info->dev, "failed to allocate memory for extcon\n"); | |
616 | return -ENOMEM; | |
617 | } | |
914b881f CC |
618 | |
619 | /* Register extcon device */ | |
620 | ret = devm_extcon_dev_register(info->dev, info->edev); | |
621 | if (ret) { | |
622 | dev_err(info->dev, "failed to register extcon device\n"); | |
623 | return ret; | |
624 | } | |
625 | ||
e1954452 CC |
626 | /* |
627 | * Detect accessory after completing the initialization of platform | |
628 | * | |
629 | * - Use delayed workqueue to detect cable state and then | |
630 | * notify cable state to notifiee/platform through uevent. | |
631 | * After completing the booting of platform, the extcon provider | |
632 | * driver should notify cable state to upper layer. | |
633 | */ | |
634 | INIT_DELAYED_WORK(&info->wq_detcable, sm5502_muic_detect_cable_wq); | |
635 | queue_delayed_work(system_power_efficient_wq, &info->wq_detcable, | |
636 | msecs_to_jiffies(DELAY_MS_DEFAULT)); | |
637 | ||
914b881f CC |
638 | /* Initialize SM5502 device and print vendor id and version id */ |
639 | sm5502_init_dev_type(info); | |
640 | ||
641 | return 0; | |
642 | } | |
643 | ||
644 | static int sm5502_muic_i2c_remove(struct i2c_client *i2c) | |
645 | { | |
646 | struct sm5502_muic_info *info = i2c_get_clientdata(i2c); | |
647 | ||
648 | regmap_del_irq_chip(info->irq, info->irq_data); | |
649 | ||
650 | return 0; | |
651 | } | |
652 | ||
34825e51 | 653 | static const struct of_device_id sm5502_dt_match[] = { |
914b881f CC |
654 | { .compatible = "siliconmitus,sm5502-muic" }, |
655 | { }, | |
656 | }; | |
ff612f91 | 657 | MODULE_DEVICE_TABLE(of, sm5502_dt_match); |
914b881f CC |
658 | |
659 | #ifdef CONFIG_PM_SLEEP | |
660 | static int sm5502_muic_suspend(struct device *dev) | |
661 | { | |
d5859342 | 662 | struct i2c_client *i2c = to_i2c_client(dev); |
914b881f CC |
663 | struct sm5502_muic_info *info = i2c_get_clientdata(i2c); |
664 | ||
665 | enable_irq_wake(info->irq); | |
666 | ||
667 | return 0; | |
668 | } | |
669 | ||
670 | static int sm5502_muic_resume(struct device *dev) | |
671 | { | |
d5859342 | 672 | struct i2c_client *i2c = to_i2c_client(dev); |
914b881f CC |
673 | struct sm5502_muic_info *info = i2c_get_clientdata(i2c); |
674 | ||
675 | disable_irq_wake(info->irq); | |
676 | ||
677 | return 0; | |
678 | } | |
679 | #endif | |
680 | ||
681 | static SIMPLE_DEV_PM_OPS(sm5502_muic_pm_ops, | |
682 | sm5502_muic_suspend, sm5502_muic_resume); | |
683 | ||
684 | static const struct i2c_device_id sm5502_i2c_id[] = { | |
685 | { "sm5502", TYPE_SM5502 }, | |
686 | { } | |
687 | }; | |
688 | MODULE_DEVICE_TABLE(i2c, sm5502_i2c_id); | |
689 | ||
690 | static struct i2c_driver sm5502_muic_i2c_driver = { | |
691 | .driver = { | |
692 | .name = "sm5502", | |
914b881f CC |
693 | .pm = &sm5502_muic_pm_ops, |
694 | .of_match_table = sm5502_dt_match, | |
695 | }, | |
696 | .probe = sm5022_muic_i2c_probe, | |
697 | .remove = sm5502_muic_i2c_remove, | |
698 | .id_table = sm5502_i2c_id, | |
699 | }; | |
700 | ||
701 | static int __init sm5502_muic_i2c_init(void) | |
702 | { | |
703 | return i2c_add_driver(&sm5502_muic_i2c_driver); | |
704 | } | |
705 | subsys_initcall(sm5502_muic_i2c_init); | |
706 | ||
707 | MODULE_DESCRIPTION("Silicon Mitus SM5502 Extcon driver"); | |
708 | MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>"); | |
709 | MODULE_LICENSE("GPL"); |