1 | // SPDX-License-Identifier: GPL-2.0-or-later |
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> |
7 | */ |
8 | |
9 | #include <linux/err.h> |
10 | #include <linux/i2c.h> |
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> |
18 | #include <linux/extcon-provider.h> |
19 | |
20 | #include "extcon-sm5502.h" |
21 | |
22 | #define DELAY_MS_DEFAULT 17000 /* unit: millisecond */ |
23 | |
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 | const struct sm5502_type *type; |
44 | struct regmap_irq_chip_data *irq_data; |
45 | int irq; |
46 | bool irq_attach; |
47 | bool irq_detach; |
48 | struct work_struct irq_work; |
49 | |
50 | struct mutex mutex; |
51 | |
52 | /* |
53 | * Use delayed workqueue to detect cable state and then |
54 | * notify cable state to notifiee/platform through uevent. |
55 | * After completing the booting of platform, the extcon provider |
56 | * driver should notify cable state to upper layer. |
57 | */ |
58 | struct delayed_work wq_detcable; |
59 | }; |
60 | |
61 | struct sm5502_type { |
62 | struct muic_irq *muic_irqs; |
63 | unsigned int num_muic_irqs; |
64 | const struct regmap_irq_chip *irq_chip; |
65 | |
66 | struct reg_data *reg_data; |
67 | unsigned int num_reg_data; |
68 | |
69 | unsigned int otg_dev_type1; |
70 | int (*parse_irq)(struct sm5502_muic_info *info, int irq_type); |
71 | }; |
72 | |
73 | /* Default value of SM5502 register to bring up MUIC device. */ |
74 | static struct reg_data sm5502_reg_data[] = { |
75 | { |
76 | .reg = SM5502_REG_RESET, |
77 | .val = SM5502_REG_RESET_MASK, |
78 | .invert = true, |
79 | }, { |
80 | .reg = SM5502_REG_CONTROL, |
81 | .val = SM5502_REG_CONTROL_MASK_INT_MASK, |
82 | .invert = false, |
83 | }, { |
84 | .reg = SM5502_REG_INTMASK1, |
85 | .val = SM5502_REG_INTM1_KP_MASK |
86 | | SM5502_REG_INTM1_LKP_MASK |
87 | | SM5502_REG_INTM1_LKR_MASK, |
88 | .invert = true, |
89 | }, { |
90 | .reg = SM5502_REG_INTMASK2, |
91 | .val = SM5502_REG_INTM2_VBUS_DET_MASK |
92 | | SM5502_REG_INTM2_REV_ACCE_MASK |
93 | | SM5502_REG_INTM2_ADC_CHG_MASK |
94 | | SM5502_REG_INTM2_STUCK_KEY_MASK |
95 | | SM5502_REG_INTM2_STUCK_KEY_RCV_MASK |
96 | | SM5502_REG_INTM2_MHL_MASK, |
97 | .invert = true, |
98 | }, |
99 | }; |
100 | |
101 | /* Default value of SM5504 register to bring up MUIC device. */ |
102 | static struct reg_data sm5504_reg_data[] = { |
103 | { |
104 | .reg = SM5502_REG_RESET, |
105 | .val = SM5502_REG_RESET_MASK, |
106 | .invert = true, |
107 | }, { |
108 | .reg = SM5502_REG_INTMASK1, |
109 | .val = SM5504_REG_INTM1_ATTACH_MASK |
110 | | SM5504_REG_INTM1_DETACH_MASK, |
111 | .invert = false, |
112 | }, { |
113 | .reg = SM5502_REG_INTMASK2, |
114 | .val = SM5504_REG_INTM2_RID_CHG_MASK |
115 | | SM5504_REG_INTM2_UVLO_MASK |
116 | | SM5504_REG_INTM2_POR_MASK, |
117 | .invert = true, |
118 | }, { |
119 | .reg = SM5502_REG_CONTROL, |
120 | .val = SM5502_REG_CONTROL_MANUAL_SW_MASK |
121 | | SM5504_REG_CONTROL_CHGTYP_MASK |
122 | | SM5504_REG_CONTROL_USBCHDEN_MASK |
123 | | SM5504_REG_CONTROL_ADC_EN_MASK, |
124 | .invert = true, |
125 | }, |
126 | }; |
127 | |
128 | /* List of detectable cables */ |
129 | static const unsigned int sm5502_extcon_cable[] = { |
130 | EXTCON_USB, |
131 | EXTCON_USB_HOST, |
132 | EXTCON_CHG_USB_SDP, |
133 | EXTCON_CHG_USB_DCP, |
134 | EXTCON_NONE, |
135 | }; |
136 | |
137 | /* Define supported accessory type */ |
138 | enum sm5502_muic_acc_type { |
139 | SM5502_MUIC_ADC_GROUND = 0x0, |
140 | SM5502_MUIC_ADC_SEND_END_BUTTON, |
141 | SM5502_MUIC_ADC_REMOTE_S1_BUTTON, |
142 | SM5502_MUIC_ADC_REMOTE_S2_BUTTON, |
143 | SM5502_MUIC_ADC_REMOTE_S3_BUTTON, |
144 | SM5502_MUIC_ADC_REMOTE_S4_BUTTON, |
145 | SM5502_MUIC_ADC_REMOTE_S5_BUTTON, |
146 | SM5502_MUIC_ADC_REMOTE_S6_BUTTON, |
147 | SM5502_MUIC_ADC_REMOTE_S7_BUTTON, |
148 | SM5502_MUIC_ADC_REMOTE_S8_BUTTON, |
149 | SM5502_MUIC_ADC_REMOTE_S9_BUTTON, |
150 | SM5502_MUIC_ADC_REMOTE_S10_BUTTON, |
151 | SM5502_MUIC_ADC_REMOTE_S11_BUTTON, |
152 | SM5502_MUIC_ADC_REMOTE_S12_BUTTON, |
153 | SM5502_MUIC_ADC_RESERVED_ACC_1, |
154 | SM5502_MUIC_ADC_RESERVED_ACC_2, |
155 | SM5502_MUIC_ADC_RESERVED_ACC_3, |
156 | SM5502_MUIC_ADC_RESERVED_ACC_4, |
157 | SM5502_MUIC_ADC_RESERVED_ACC_5, |
158 | SM5502_MUIC_ADC_AUDIO_TYPE2, |
159 | SM5502_MUIC_ADC_PHONE_POWERED_DEV, |
160 | SM5502_MUIC_ADC_TTY_CONVERTER, |
161 | SM5502_MUIC_ADC_UART_CABLE, |
162 | SM5502_MUIC_ADC_TYPE1_CHARGER, |
163 | SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB, |
164 | SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB, |
165 | SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE, |
166 | SM5502_MUIC_ADC_TYPE2_CHARGER, |
167 | SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART, |
168 | SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART, |
169 | SM5502_MUIC_ADC_AUDIO_TYPE1, |
170 | SM5502_MUIC_ADC_OPEN = 0x1f, |
171 | |
172 | /* |
173 | * The below accessories have same ADC value (0x1f or 0x1e). |
174 | * So, Device type1 is used to separate specific accessory. |
175 | */ |
176 | /* |---------|--ADC| */ |
177 | /* | [7:5]|[4:0]| */ |
178 | SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE = 0x3e, /* | 001|11110| */ |
179 | SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END = 0x5e, /* | 010|11110| */ |
180 | /* |Dev Type1|--ADC| */ |
181 | SM5502_MUIC_ADC_GROUND_USB_OTG = 0x80, /* | 100|00000| */ |
182 | SM5502_MUIC_ADC_OPEN_USB = 0x5f, /* | 010|11111| */ |
183 | SM5502_MUIC_ADC_OPEN_TA = 0xdf, /* | 110|11111| */ |
184 | SM5502_MUIC_ADC_OPEN_USB_OTG = 0xff, /* | 111|11111| */ |
185 | }; |
186 | |
187 | /* List of supported interrupt for SM5502 */ |
188 | static struct muic_irq sm5502_muic_irqs[] = { |
189 | { SM5502_IRQ_INT1_ATTACH, "muic-attach" }, |
190 | { SM5502_IRQ_INT1_DETACH, "muic-detach" }, |
191 | { SM5502_IRQ_INT1_KP, "muic-kp" }, |
192 | { SM5502_IRQ_INT1_LKP, "muic-lkp" }, |
193 | { SM5502_IRQ_INT1_LKR, "muic-lkr" }, |
194 | { SM5502_IRQ_INT1_OVP_EVENT, "muic-ovp-event" }, |
195 | { SM5502_IRQ_INT1_OCP_EVENT, "muic-ocp-event" }, |
196 | { SM5502_IRQ_INT1_OVP_OCP_DIS, "muic-ovp-ocp-dis" }, |
197 | { SM5502_IRQ_INT2_VBUS_DET, "muic-vbus-det" }, |
198 | { SM5502_IRQ_INT2_REV_ACCE, "muic-rev-acce" }, |
199 | { SM5502_IRQ_INT2_ADC_CHG, "muic-adc-chg" }, |
200 | { SM5502_IRQ_INT2_STUCK_KEY, "muic-stuck-key" }, |
201 | { SM5502_IRQ_INT2_STUCK_KEY_RCV, "muic-stuck-key-rcv" }, |
202 | { SM5502_IRQ_INT2_MHL, "muic-mhl" }, |
203 | }; |
204 | |
205 | /* Define interrupt list of SM5502 to register regmap_irq */ |
206 | static const struct regmap_irq sm5502_irqs[] = { |
207 | /* INT1 interrupts */ |
208 | { .reg_offset = 0, .mask = SM5502_IRQ_INT1_ATTACH_MASK, }, |
209 | { .reg_offset = 0, .mask = SM5502_IRQ_INT1_DETACH_MASK, }, |
210 | { .reg_offset = 0, .mask = SM5502_IRQ_INT1_KP_MASK, }, |
211 | { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKP_MASK, }, |
212 | { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKR_MASK, }, |
213 | { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_EVENT_MASK, }, |
214 | { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OCP_EVENT_MASK, }, |
215 | { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_OCP_DIS_MASK, }, |
216 | |
217 | /* INT2 interrupts */ |
218 | { .reg_offset = 1, .mask = SM5502_IRQ_INT2_VBUS_DET_MASK,}, |
219 | { .reg_offset = 1, .mask = SM5502_IRQ_INT2_REV_ACCE_MASK, }, |
220 | { .reg_offset = 1, .mask = SM5502_IRQ_INT2_ADC_CHG_MASK, }, |
221 | { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_MASK, }, |
222 | { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_RCV_MASK, }, |
223 | { .reg_offset = 1, .mask = SM5502_IRQ_INT2_MHL_MASK, }, |
224 | }; |
225 | |
226 | static const struct regmap_irq_chip sm5502_muic_irq_chip = { |
227 | .name = "sm5502" , |
228 | .status_base = SM5502_REG_INT1, |
229 | .mask_base = SM5502_REG_INTMASK1, |
230 | .num_regs = 2, |
231 | .irqs = sm5502_irqs, |
232 | .num_irqs = ARRAY_SIZE(sm5502_irqs), |
233 | }; |
234 | |
235 | /* List of supported interrupt for SM5504 */ |
236 | static struct muic_irq sm5504_muic_irqs[] = { |
237 | { SM5504_IRQ_INT1_ATTACH, "muic-attach" }, |
238 | { SM5504_IRQ_INT1_DETACH, "muic-detach" }, |
239 | { SM5504_IRQ_INT1_CHG_DET, "muic-chg-det" }, |
240 | { SM5504_IRQ_INT1_DCD_OUT, "muic-dcd-out" }, |
241 | { SM5504_IRQ_INT1_OVP_EVENT, "muic-ovp-event" }, |
242 | { SM5504_IRQ_INT1_CONNECT, "muic-connect" }, |
243 | { SM5504_IRQ_INT1_ADC_CHG, "muic-adc-chg" }, |
244 | { SM5504_IRQ_INT2_RID_CHG, "muic-rid-chg" }, |
245 | { SM5504_IRQ_INT2_UVLO, "muic-uvlo" }, |
246 | { SM5504_IRQ_INT2_POR, "muic-por" }, |
247 | { SM5504_IRQ_INT2_OVP_FET, "muic-ovp-fet" }, |
248 | { SM5504_IRQ_INT2_OCP_LATCH, "muic-ocp-latch" }, |
249 | { SM5504_IRQ_INT2_OCP_EVENT, "muic-ocp-event" }, |
250 | { SM5504_IRQ_INT2_OVP_OCP_EVENT, "muic-ovp-ocp-event" }, |
251 | }; |
252 | |
253 | /* Define interrupt list of SM5504 to register regmap_irq */ |
254 | static const struct regmap_irq sm5504_irqs[] = { |
255 | /* INT1 interrupts */ |
256 | { .reg_offset = 0, .mask = SM5504_IRQ_INT1_ATTACH_MASK, }, |
257 | { .reg_offset = 0, .mask = SM5504_IRQ_INT1_DETACH_MASK, }, |
258 | { .reg_offset = 0, .mask = SM5504_IRQ_INT1_CHG_DET_MASK, }, |
259 | { .reg_offset = 0, .mask = SM5504_IRQ_INT1_DCD_OUT_MASK, }, |
260 | { .reg_offset = 0, .mask = SM5504_IRQ_INT1_OVP_MASK, }, |
261 | { .reg_offset = 0, .mask = SM5504_IRQ_INT1_CONNECT_MASK, }, |
262 | { .reg_offset = 0, .mask = SM5504_IRQ_INT1_ADC_CHG_MASK, }, |
263 | |
264 | /* INT2 interrupts */ |
265 | { .reg_offset = 1, .mask = SM5504_IRQ_INT2_RID_CHG_MASK,}, |
266 | { .reg_offset = 1, .mask = SM5504_IRQ_INT2_UVLO_MASK, }, |
267 | { .reg_offset = 1, .mask = SM5504_IRQ_INT2_POR_MASK, }, |
268 | { .reg_offset = 1, .mask = SM5504_IRQ_INT2_OVP_FET_MASK, }, |
269 | { .reg_offset = 1, .mask = SM5504_IRQ_INT2_OCP_LATCH_MASK, }, |
270 | { .reg_offset = 1, .mask = SM5504_IRQ_INT2_OCP_EVENT_MASK, }, |
271 | { .reg_offset = 1, .mask = SM5504_IRQ_INT2_OVP_OCP_EVENT_MASK, }, |
272 | }; |
273 | |
274 | static const struct regmap_irq_chip sm5504_muic_irq_chip = { |
275 | .name = "sm5504" , |
276 | .status_base = SM5502_REG_INT1, |
277 | .mask_base = SM5502_REG_INTMASK1, |
278 | .num_regs = 2, |
279 | .irqs = sm5504_irqs, |
280 | .num_irqs = ARRAY_SIZE(sm5504_irqs), |
281 | }; |
282 | |
283 | /* Define regmap configuration of SM5502 for I2C communication */ |
284 | static bool sm5502_muic_volatile_reg(struct device *dev, unsigned int reg) |
285 | { |
286 | switch (reg) { |
287 | case SM5502_REG_INTMASK1: |
288 | case SM5502_REG_INTMASK2: |
289 | return true; |
290 | default: |
291 | break; |
292 | } |
293 | return false; |
294 | } |
295 | |
296 | static const struct regmap_config sm5502_muic_regmap_config = { |
297 | .reg_bits = 8, |
298 | .val_bits = 8, |
299 | .volatile_reg = sm5502_muic_volatile_reg, |
300 | .max_register = SM5502_REG_END, |
301 | }; |
302 | |
303 | /* Change DM_CON/DP_CON/VBUSIN switch according to cable type */ |
304 | static int sm5502_muic_set_path(struct sm5502_muic_info *info, |
305 | unsigned int con_sw, unsigned int vbus_sw, |
306 | bool attached) |
307 | { |
308 | int ret; |
309 | |
310 | if (!attached) { |
311 | con_sw = DM_DP_SWITCH_OPEN; |
312 | vbus_sw = VBUSIN_SWITCH_OPEN; |
313 | } |
314 | |
315 | switch (con_sw) { |
316 | case DM_DP_SWITCH_OPEN: |
317 | case DM_DP_SWITCH_USB: |
318 | case DM_DP_SWITCH_AUDIO: |
319 | case DM_DP_SWITCH_UART: |
320 | ret = regmap_update_bits(map: info->regmap, reg: SM5502_REG_MANUAL_SW1, |
321 | SM5502_REG_MANUAL_SW1_DP_MASK | |
322 | SM5502_REG_MANUAL_SW1_DM_MASK, |
323 | val: con_sw); |
324 | if (ret < 0) { |
325 | dev_err(info->dev, |
326 | "cannot update DM_CON/DP_CON switch\n" ); |
327 | return ret; |
328 | } |
329 | break; |
330 | default: |
331 | dev_err(info->dev, "Unknown DM_CON/DP_CON switch type (%d)\n" , |
332 | con_sw); |
333 | return -EINVAL; |
334 | } |
335 | |
336 | switch (vbus_sw) { |
337 | case VBUSIN_SWITCH_OPEN: |
338 | case VBUSIN_SWITCH_VBUSOUT: |
339 | case VBUSIN_SWITCH_MIC: |
340 | case VBUSIN_SWITCH_VBUSOUT_WITH_USB: |
341 | ret = regmap_update_bits(map: info->regmap, reg: SM5502_REG_MANUAL_SW1, |
342 | SM5502_REG_MANUAL_SW1_VBUSIN_MASK, |
343 | val: vbus_sw); |
344 | if (ret < 0) { |
345 | dev_err(info->dev, |
346 | "cannot update VBUSIN switch\n" ); |
347 | return ret; |
348 | } |
349 | break; |
350 | default: |
351 | dev_err(info->dev, "Unknown VBUS switch type (%d)\n" , vbus_sw); |
352 | return -EINVAL; |
353 | } |
354 | |
355 | return 0; |
356 | } |
357 | |
358 | /* Return cable type of attached or detached accessories */ |
359 | static unsigned int sm5502_muic_get_cable_type(struct sm5502_muic_info *info) |
360 | { |
361 | unsigned int cable_type, adc, dev_type1; |
362 | int ret; |
363 | |
364 | /* Read ADC value according to external cable or button */ |
365 | ret = regmap_read(map: info->regmap, reg: SM5502_REG_ADC, val: &adc); |
366 | if (ret) { |
367 | dev_err(info->dev, "failed to read ADC register\n" ); |
368 | return ret; |
369 | } |
370 | |
371 | /* |
372 | * If ADC is SM5502_MUIC_ADC_GROUND(0x0), external cable hasn't |
373 | * connected with to MUIC device. |
374 | */ |
375 | cable_type = adc & SM5502_REG_ADC_MASK; |
376 | |
377 | switch (cable_type) { |
378 | case SM5502_MUIC_ADC_GROUND: |
379 | ret = regmap_read(map: info->regmap, reg: SM5502_REG_DEV_TYPE1, |
380 | val: &dev_type1); |
381 | if (ret) { |
382 | dev_err(info->dev, "failed to read DEV_TYPE1 reg\n" ); |
383 | return ret; |
384 | } |
385 | |
386 | if (dev_type1 == info->type->otg_dev_type1) { |
387 | cable_type = SM5502_MUIC_ADC_GROUND_USB_OTG; |
388 | } else { |
389 | dev_dbg(info->dev, |
390 | "cannot identify the cable type: adc(0x%x), dev_type1(0x%x)\n" , |
391 | adc, dev_type1); |
392 | return -EINVAL; |
393 | } |
394 | break; |
395 | case SM5502_MUIC_ADC_SEND_END_BUTTON: |
396 | case SM5502_MUIC_ADC_REMOTE_S1_BUTTON: |
397 | case SM5502_MUIC_ADC_REMOTE_S2_BUTTON: |
398 | case SM5502_MUIC_ADC_REMOTE_S3_BUTTON: |
399 | case SM5502_MUIC_ADC_REMOTE_S4_BUTTON: |
400 | case SM5502_MUIC_ADC_REMOTE_S5_BUTTON: |
401 | case SM5502_MUIC_ADC_REMOTE_S6_BUTTON: |
402 | case SM5502_MUIC_ADC_REMOTE_S7_BUTTON: |
403 | case SM5502_MUIC_ADC_REMOTE_S8_BUTTON: |
404 | case SM5502_MUIC_ADC_REMOTE_S9_BUTTON: |
405 | case SM5502_MUIC_ADC_REMOTE_S10_BUTTON: |
406 | case SM5502_MUIC_ADC_REMOTE_S11_BUTTON: |
407 | case SM5502_MUIC_ADC_REMOTE_S12_BUTTON: |
408 | case SM5502_MUIC_ADC_RESERVED_ACC_1: |
409 | case SM5502_MUIC_ADC_RESERVED_ACC_2: |
410 | case SM5502_MUIC_ADC_RESERVED_ACC_3: |
411 | case SM5502_MUIC_ADC_RESERVED_ACC_4: |
412 | case SM5502_MUIC_ADC_RESERVED_ACC_5: |
413 | case SM5502_MUIC_ADC_AUDIO_TYPE2: |
414 | case SM5502_MUIC_ADC_PHONE_POWERED_DEV: |
415 | case SM5502_MUIC_ADC_TTY_CONVERTER: |
416 | case SM5502_MUIC_ADC_UART_CABLE: |
417 | case SM5502_MUIC_ADC_TYPE1_CHARGER: |
418 | case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB: |
419 | case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB: |
420 | case SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE: |
421 | case SM5502_MUIC_ADC_TYPE2_CHARGER: |
422 | case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART: |
423 | case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART: |
424 | break; |
425 | case SM5502_MUIC_ADC_AUDIO_TYPE1: |
426 | /* |
427 | * Check whether cable type is |
428 | * SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE |
429 | * or SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END |
430 | * by using Button event. |
431 | */ |
432 | break; |
433 | case SM5502_MUIC_ADC_OPEN: |
434 | ret = regmap_read(map: info->regmap, reg: SM5502_REG_DEV_TYPE1, |
435 | val: &dev_type1); |
436 | if (ret) { |
437 | dev_err(info->dev, "failed to read DEV_TYPE1 reg\n" ); |
438 | return ret; |
439 | } |
440 | |
441 | if (dev_type1 == info->type->otg_dev_type1) { |
442 | cable_type = SM5502_MUIC_ADC_OPEN_USB_OTG; |
443 | break; |
444 | } |
445 | |
446 | switch (dev_type1) { |
447 | case SM5502_REG_DEV_TYPE1_USB_SDP_MASK: |
448 | cable_type = SM5502_MUIC_ADC_OPEN_USB; |
449 | break; |
450 | case SM5502_REG_DEV_TYPE1_DEDICATED_CHG_MASK: |
451 | cable_type = SM5502_MUIC_ADC_OPEN_TA; |
452 | break; |
453 | default: |
454 | dev_dbg(info->dev, |
455 | "cannot identify the cable type: adc(0x%x)\n" , |
456 | adc); |
457 | return -EINVAL; |
458 | } |
459 | break; |
460 | default: |
461 | dev_err(info->dev, |
462 | "failed to identify the cable type: adc(0x%x)\n" , adc); |
463 | return -EINVAL; |
464 | } |
465 | |
466 | return cable_type; |
467 | } |
468 | |
469 | static int sm5502_muic_cable_handler(struct sm5502_muic_info *info, |
470 | bool attached) |
471 | { |
472 | static unsigned int prev_cable_type = SM5502_MUIC_ADC_GROUND; |
473 | unsigned int cable_type = SM5502_MUIC_ADC_GROUND; |
474 | unsigned int con_sw = DM_DP_SWITCH_OPEN; |
475 | unsigned int vbus_sw = VBUSIN_SWITCH_OPEN; |
476 | unsigned int id; |
477 | int ret; |
478 | |
479 | /* Get the type of attached or detached cable */ |
480 | if (attached) |
481 | cable_type = sm5502_muic_get_cable_type(info); |
482 | else |
483 | cable_type = prev_cable_type; |
484 | prev_cable_type = cable_type; |
485 | |
486 | switch (cable_type) { |
487 | case SM5502_MUIC_ADC_OPEN_USB: |
488 | id = EXTCON_USB; |
489 | con_sw = DM_DP_SWITCH_USB; |
490 | vbus_sw = VBUSIN_SWITCH_VBUSOUT_WITH_USB; |
491 | break; |
492 | case SM5502_MUIC_ADC_OPEN_TA: |
493 | id = EXTCON_CHG_USB_DCP; |
494 | con_sw = DM_DP_SWITCH_OPEN; |
495 | vbus_sw = VBUSIN_SWITCH_VBUSOUT; |
496 | break; |
497 | case SM5502_MUIC_ADC_GROUND_USB_OTG: |
498 | case SM5502_MUIC_ADC_OPEN_USB_OTG: |
499 | id = EXTCON_USB_HOST; |
500 | con_sw = DM_DP_SWITCH_USB; |
501 | vbus_sw = VBUSIN_SWITCH_OPEN; |
502 | break; |
503 | default: |
504 | dev_dbg(info->dev, |
505 | "cannot handle this cable_type (0x%x)\n" , cable_type); |
506 | return 0; |
507 | } |
508 | |
509 | /* Change internal hardware path(DM_CON/DP_CON, VBUSIN) */ |
510 | ret = sm5502_muic_set_path(info, con_sw, vbus_sw, attached); |
511 | if (ret < 0) |
512 | return ret; |
513 | |
514 | /* Change the state of external accessory */ |
515 | extcon_set_state_sync(edev: info->edev, id, state: attached); |
516 | if (id == EXTCON_USB) |
517 | extcon_set_state_sync(edev: info->edev, EXTCON_CHG_USB_SDP, |
518 | state: attached); |
519 | |
520 | return 0; |
521 | } |
522 | |
523 | static void sm5502_muic_irq_work(struct work_struct *work) |
524 | { |
525 | struct sm5502_muic_info *info = container_of(work, |
526 | struct sm5502_muic_info, irq_work); |
527 | int ret = 0; |
528 | |
529 | if (!info->edev) |
530 | return; |
531 | |
532 | mutex_lock(&info->mutex); |
533 | |
534 | /* Detect attached or detached cables */ |
535 | if (info->irq_attach) { |
536 | ret = sm5502_muic_cable_handler(info, attached: true); |
537 | info->irq_attach = false; |
538 | } |
539 | if (info->irq_detach) { |
540 | ret = sm5502_muic_cable_handler(info, attached: false); |
541 | info->irq_detach = false; |
542 | } |
543 | |
544 | if (ret < 0) |
545 | dev_err(info->dev, "failed to handle MUIC interrupt\n" ); |
546 | |
547 | mutex_unlock(lock: &info->mutex); |
548 | } |
549 | |
550 | /* |
551 | * Sets irq_attach or irq_detach in sm5502_muic_info and returns 0. |
552 | * Returns -ESRCH if irq_type does not match registered IRQ for this dev type. |
553 | */ |
554 | static int sm5502_parse_irq(struct sm5502_muic_info *info, int irq_type) |
555 | { |
556 | switch (irq_type) { |
557 | case SM5502_IRQ_INT1_ATTACH: |
558 | info->irq_attach = true; |
559 | break; |
560 | case SM5502_IRQ_INT1_DETACH: |
561 | info->irq_detach = true; |
562 | break; |
563 | case SM5502_IRQ_INT1_KP: |
564 | case SM5502_IRQ_INT1_LKP: |
565 | case SM5502_IRQ_INT1_LKR: |
566 | case SM5502_IRQ_INT1_OVP_EVENT: |
567 | case SM5502_IRQ_INT1_OCP_EVENT: |
568 | case SM5502_IRQ_INT1_OVP_OCP_DIS: |
569 | case SM5502_IRQ_INT2_VBUS_DET: |
570 | case SM5502_IRQ_INT2_REV_ACCE: |
571 | case SM5502_IRQ_INT2_ADC_CHG: |
572 | case SM5502_IRQ_INT2_STUCK_KEY: |
573 | case SM5502_IRQ_INT2_STUCK_KEY_RCV: |
574 | case SM5502_IRQ_INT2_MHL: |
575 | default: |
576 | break; |
577 | } |
578 | |
579 | return 0; |
580 | } |
581 | |
582 | static int sm5504_parse_irq(struct sm5502_muic_info *info, int irq_type) |
583 | { |
584 | switch (irq_type) { |
585 | case SM5504_IRQ_INT1_ATTACH: |
586 | info->irq_attach = true; |
587 | break; |
588 | case SM5504_IRQ_INT1_DETACH: |
589 | info->irq_detach = true; |
590 | break; |
591 | case SM5504_IRQ_INT1_CHG_DET: |
592 | case SM5504_IRQ_INT1_DCD_OUT: |
593 | case SM5504_IRQ_INT1_OVP_EVENT: |
594 | case SM5504_IRQ_INT1_CONNECT: |
595 | case SM5504_IRQ_INT1_ADC_CHG: |
596 | case SM5504_IRQ_INT2_RID_CHG: |
597 | case SM5504_IRQ_INT2_UVLO: |
598 | case SM5504_IRQ_INT2_POR: |
599 | case SM5504_IRQ_INT2_OVP_FET: |
600 | case SM5504_IRQ_INT2_OCP_LATCH: |
601 | case SM5504_IRQ_INT2_OCP_EVENT: |
602 | case SM5504_IRQ_INT2_OVP_OCP_EVENT: |
603 | default: |
604 | break; |
605 | } |
606 | |
607 | return 0; |
608 | } |
609 | |
610 | static irqreturn_t sm5502_muic_irq_handler(int irq, void *data) |
611 | { |
612 | struct sm5502_muic_info *info = data; |
613 | int i, irq_type = -1, ret; |
614 | |
615 | for (i = 0; i < info->type->num_muic_irqs; i++) |
616 | if (irq == info->type->muic_irqs[i].virq) |
617 | irq_type = info->type->muic_irqs[i].irq; |
618 | |
619 | ret = info->type->parse_irq(info, irq_type); |
620 | if (ret < 0) { |
621 | dev_warn(info->dev, "cannot handle is interrupt:%d\n" , |
622 | irq_type); |
623 | return IRQ_HANDLED; |
624 | } |
625 | schedule_work(work: &info->irq_work); |
626 | |
627 | return IRQ_HANDLED; |
628 | } |
629 | |
630 | static void sm5502_muic_detect_cable_wq(struct work_struct *work) |
631 | { |
632 | struct sm5502_muic_info *info = container_of(to_delayed_work(work), |
633 | struct sm5502_muic_info, wq_detcable); |
634 | int ret; |
635 | |
636 | /* Notify the state of connector cable or not */ |
637 | ret = sm5502_muic_cable_handler(info, attached: true); |
638 | if (ret < 0) |
639 | dev_warn(info->dev, "failed to detect cable state\n" ); |
640 | } |
641 | |
642 | static void sm5502_init_dev_type(struct sm5502_muic_info *info) |
643 | { |
644 | unsigned int reg_data, vendor_id, version_id; |
645 | int i, ret; |
646 | |
647 | /* To test I2C, Print version_id and vendor_id of SM5502 */ |
648 | ret = regmap_read(map: info->regmap, reg: SM5502_REG_DEVICE_ID, val: ®_data); |
649 | if (ret) { |
650 | dev_err(info->dev, |
651 | "failed to read DEVICE_ID register: %d\n" , ret); |
652 | return; |
653 | } |
654 | |
655 | vendor_id = ((reg_data & SM5502_REG_DEVICE_ID_VENDOR_MASK) >> |
656 | SM5502_REG_DEVICE_ID_VENDOR_SHIFT); |
657 | version_id = ((reg_data & SM5502_REG_DEVICE_ID_VERSION_MASK) >> |
658 | SM5502_REG_DEVICE_ID_VERSION_SHIFT); |
659 | |
660 | dev_info(info->dev, "Device type: version: 0x%x, vendor: 0x%x\n" , |
661 | version_id, vendor_id); |
662 | |
663 | /* Initiazle the register of SM5502 device to bring-up */ |
664 | for (i = 0; i < info->type->num_reg_data; i++) { |
665 | unsigned int val = 0; |
666 | |
667 | if (!info->type->reg_data[i].invert) |
668 | val |= ~info->type->reg_data[i].val; |
669 | else |
670 | val = info->type->reg_data[i].val; |
671 | regmap_write(map: info->regmap, reg: info->type->reg_data[i].reg, val); |
672 | } |
673 | } |
674 | |
675 | static int sm5022_muic_i2c_probe(struct i2c_client *i2c) |
676 | { |
677 | struct device_node *np = i2c->dev.of_node; |
678 | struct sm5502_muic_info *info; |
679 | int i, ret, irq_flags; |
680 | |
681 | if (!np) |
682 | return -EINVAL; |
683 | |
684 | info = devm_kzalloc(dev: &i2c->dev, size: sizeof(*info), GFP_KERNEL); |
685 | if (!info) |
686 | return -ENOMEM; |
687 | i2c_set_clientdata(client: i2c, data: info); |
688 | |
689 | info->dev = &i2c->dev; |
690 | info->i2c = i2c; |
691 | info->irq = i2c->irq; |
692 | info->type = device_get_match_data(dev: info->dev); |
693 | if (!info->type) |
694 | return -EINVAL; |
695 | if (!info->type->parse_irq) { |
696 | dev_err(info->dev, "parse_irq missing in struct sm5502_type\n" ); |
697 | return -EINVAL; |
698 | } |
699 | |
700 | mutex_init(&info->mutex); |
701 | |
702 | INIT_WORK(&info->irq_work, sm5502_muic_irq_work); |
703 | |
704 | info->regmap = devm_regmap_init_i2c(i2c, &sm5502_muic_regmap_config); |
705 | if (IS_ERR(ptr: info->regmap)) { |
706 | ret = PTR_ERR(ptr: info->regmap); |
707 | dev_err(info->dev, "failed to allocate register map: %d\n" , |
708 | ret); |
709 | return ret; |
710 | } |
711 | |
712 | /* Support irq domain for SM5502 MUIC device */ |
713 | irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED; |
714 | ret = devm_regmap_add_irq_chip(dev: info->dev, map: info->regmap, irq: info->irq, |
715 | irq_flags, irq_base: 0, chip: info->type->irq_chip, |
716 | data: &info->irq_data); |
717 | if (ret != 0) { |
718 | dev_err(info->dev, "failed to request IRQ %d: %d\n" , |
719 | info->irq, ret); |
720 | return ret; |
721 | } |
722 | |
723 | for (i = 0; i < info->type->num_muic_irqs; i++) { |
724 | struct muic_irq *muic_irq = &info->type->muic_irqs[i]; |
725 | int virq = 0; |
726 | |
727 | virq = regmap_irq_get_virq(data: info->irq_data, irq: muic_irq->irq); |
728 | if (virq <= 0) |
729 | return -EINVAL; |
730 | muic_irq->virq = virq; |
731 | |
732 | ret = devm_request_threaded_irq(dev: info->dev, irq: virq, NULL, |
733 | thread_fn: sm5502_muic_irq_handler, |
734 | IRQF_NO_SUSPEND | IRQF_ONESHOT, |
735 | devname: muic_irq->name, dev_id: info); |
736 | if (ret) { |
737 | dev_err(info->dev, |
738 | "failed: irq request (IRQ: %d, error :%d)\n" , |
739 | muic_irq->irq, ret); |
740 | return ret; |
741 | } |
742 | } |
743 | |
744 | /* Allocate extcon device */ |
745 | info->edev = devm_extcon_dev_allocate(dev: info->dev, cable: sm5502_extcon_cable); |
746 | if (IS_ERR(ptr: info->edev)) { |
747 | dev_err(info->dev, "failed to allocate memory for extcon\n" ); |
748 | return -ENOMEM; |
749 | } |
750 | |
751 | /* Register extcon device */ |
752 | ret = devm_extcon_dev_register(dev: info->dev, edev: info->edev); |
753 | if (ret) { |
754 | dev_err(info->dev, "failed to register extcon device\n" ); |
755 | return ret; |
756 | } |
757 | |
758 | /* |
759 | * Detect accessory after completing the initialization of platform |
760 | * |
761 | * - Use delayed workqueue to detect cable state and then |
762 | * notify cable state to notifiee/platform through uevent. |
763 | * After completing the booting of platform, the extcon provider |
764 | * driver should notify cable state to upper layer. |
765 | */ |
766 | INIT_DELAYED_WORK(&info->wq_detcable, sm5502_muic_detect_cable_wq); |
767 | queue_delayed_work(wq: system_power_efficient_wq, dwork: &info->wq_detcable, |
768 | delay: msecs_to_jiffies(DELAY_MS_DEFAULT)); |
769 | |
770 | /* Initialize SM5502 device and print vendor id and version id */ |
771 | sm5502_init_dev_type(info); |
772 | |
773 | return 0; |
774 | } |
775 | |
776 | static const struct sm5502_type sm5502_data = { |
777 | .muic_irqs = sm5502_muic_irqs, |
778 | .num_muic_irqs = ARRAY_SIZE(sm5502_muic_irqs), |
779 | .irq_chip = &sm5502_muic_irq_chip, |
780 | .reg_data = sm5502_reg_data, |
781 | .num_reg_data = ARRAY_SIZE(sm5502_reg_data), |
782 | .otg_dev_type1 = SM5502_REG_DEV_TYPE1_USB_OTG_MASK, |
783 | .parse_irq = sm5502_parse_irq, |
784 | }; |
785 | |
786 | static const struct sm5502_type sm5504_data = { |
787 | .muic_irqs = sm5504_muic_irqs, |
788 | .num_muic_irqs = ARRAY_SIZE(sm5504_muic_irqs), |
789 | .irq_chip = &sm5504_muic_irq_chip, |
790 | .reg_data = sm5504_reg_data, |
791 | .num_reg_data = ARRAY_SIZE(sm5504_reg_data), |
792 | .otg_dev_type1 = SM5504_REG_DEV_TYPE1_USB_OTG_MASK, |
793 | .parse_irq = sm5504_parse_irq, |
794 | }; |
795 | |
796 | static const struct of_device_id sm5502_dt_match[] = { |
797 | { .compatible = "siliconmitus,sm5502-muic" , .data = &sm5502_data }, |
798 | { .compatible = "siliconmitus,sm5504-muic" , .data = &sm5504_data }, |
799 | { .compatible = "siliconmitus,sm5703-muic" , .data = &sm5502_data }, |
800 | { }, |
801 | }; |
802 | MODULE_DEVICE_TABLE(of, sm5502_dt_match); |
803 | |
804 | #ifdef CONFIG_PM_SLEEP |
805 | static int sm5502_muic_suspend(struct device *dev) |
806 | { |
807 | struct i2c_client *i2c = to_i2c_client(dev); |
808 | struct sm5502_muic_info *info = i2c_get_clientdata(client: i2c); |
809 | |
810 | enable_irq_wake(irq: info->irq); |
811 | |
812 | return 0; |
813 | } |
814 | |
815 | static int sm5502_muic_resume(struct device *dev) |
816 | { |
817 | struct i2c_client *i2c = to_i2c_client(dev); |
818 | struct sm5502_muic_info *info = i2c_get_clientdata(client: i2c); |
819 | |
820 | disable_irq_wake(irq: info->irq); |
821 | |
822 | return 0; |
823 | } |
824 | #endif |
825 | |
826 | static SIMPLE_DEV_PM_OPS(sm5502_muic_pm_ops, |
827 | sm5502_muic_suspend, sm5502_muic_resume); |
828 | |
829 | static const struct i2c_device_id sm5502_i2c_id[] = { |
830 | { "sm5502" , (kernel_ulong_t)&sm5502_data }, |
831 | { "sm5504" , (kernel_ulong_t)&sm5504_data }, |
832 | { "sm5703-muic" , (kernel_ulong_t)&sm5502_data }, |
833 | { } |
834 | }; |
835 | MODULE_DEVICE_TABLE(i2c, sm5502_i2c_id); |
836 | |
837 | static struct i2c_driver sm5502_muic_i2c_driver = { |
838 | .driver = { |
839 | .name = "sm5502" , |
840 | .pm = &sm5502_muic_pm_ops, |
841 | .of_match_table = sm5502_dt_match, |
842 | }, |
843 | .probe = sm5022_muic_i2c_probe, |
844 | .id_table = sm5502_i2c_id, |
845 | }; |
846 | |
847 | static int __init sm5502_muic_i2c_init(void) |
848 | { |
849 | return i2c_add_driver(&sm5502_muic_i2c_driver); |
850 | } |
851 | subsys_initcall(sm5502_muic_i2c_init); |
852 | |
853 | MODULE_DESCRIPTION("Silicon Mitus SM5502 Extcon driver" ); |
854 | MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>" ); |
855 | MODULE_LICENSE("GPL" ); |
856 | |