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path: root/drivers/extcon/extcon-max8997.c
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Diffstat (limited to 'drivers/extcon/extcon-max8997.c')
-rw-r--r--drivers/extcon/extcon-max8997.c734
1 files changed, 496 insertions, 238 deletions
diff --git a/drivers/extcon/extcon-max8997.c b/drivers/extcon/extcon-max8997.c
index 93009fe6ef05..e636d950ad6c 100644
--- a/drivers/extcon/extcon-max8997.c
+++ b/drivers/extcon/extcon-max8997.c
@@ -29,51 +29,14 @@
29#include <linux/irqdomain.h> 29#include <linux/irqdomain.h>
30 30
31#define DEV_NAME "max8997-muic" 31#define DEV_NAME "max8997-muic"
32#define DELAY_MS_DEFAULT 20000 /* unit: millisecond */
32 33
33/* MAX8997-MUIC STATUS1 register */ 34enum max8997_muic_adc_debounce_time {
34#define STATUS1_ADC_SHIFT 0 35 ADC_DEBOUNCE_TIME_0_5MS = 0, /* 0.5ms */
35#define STATUS1_ADCLOW_SHIFT 5 36 ADC_DEBOUNCE_TIME_10MS, /* 10ms */
36#define STATUS1_ADCERR_SHIFT 6 37 ADC_DEBOUNCE_TIME_25MS, /* 25ms */
37#define STATUS1_ADC_MASK (0x1f << STATUS1_ADC_SHIFT) 38 ADC_DEBOUNCE_TIME_38_62MS, /* 38.62ms */
38#define STATUS1_ADCLOW_MASK (0x1 << STATUS1_ADCLOW_SHIFT) 39};
39#define STATUS1_ADCERR_MASK (0x1 << STATUS1_ADCERR_SHIFT)
40
41/* MAX8997-MUIC STATUS2 register */
42#define STATUS2_CHGTYP_SHIFT 0
43#define STATUS2_CHGDETRUN_SHIFT 3
44#define STATUS2_DCDTMR_SHIFT 4
45#define STATUS2_DBCHG_SHIFT 5
46#define STATUS2_VBVOLT_SHIFT 6
47#define STATUS2_CHGTYP_MASK (0x7 << STATUS2_CHGTYP_SHIFT)
48#define STATUS2_CHGDETRUN_MASK (0x1 << STATUS2_CHGDETRUN_SHIFT)
49#define STATUS2_DCDTMR_MASK (0x1 << STATUS2_DCDTMR_SHIFT)
50#define STATUS2_DBCHG_MASK (0x1 << STATUS2_DBCHG_SHIFT)
51#define STATUS2_VBVOLT_MASK (0x1 << STATUS2_VBVOLT_SHIFT)
52
53/* MAX8997-MUIC STATUS3 register */
54#define STATUS3_OVP_SHIFT 2
55#define STATUS3_OVP_MASK (0x1 << STATUS3_OVP_SHIFT)
56
57/* MAX8997-MUIC CONTROL1 register */
58#define COMN1SW_SHIFT 0
59#define COMP2SW_SHIFT 3
60#define COMN1SW_MASK (0x7 << COMN1SW_SHIFT)
61#define COMP2SW_MASK (0x7 << COMP2SW_SHIFT)
62#define SW_MASK (COMP2SW_MASK | COMN1SW_MASK)
63
64#define MAX8997_SW_USB ((1 << COMP2SW_SHIFT) | (1 << COMN1SW_SHIFT))
65#define MAX8997_SW_AUDIO ((2 << COMP2SW_SHIFT) | (2 << COMN1SW_SHIFT))
66#define MAX8997_SW_UART ((3 << COMP2SW_SHIFT) | (3 << COMN1SW_SHIFT))
67#define MAX8997_SW_OPEN ((0 << COMP2SW_SHIFT) | (0 << COMN1SW_SHIFT))
68
69#define MAX8997_ADC_GROUND 0x00
70#define MAX8997_ADC_MHL 0x01
71#define MAX8997_ADC_JIG_USB_1 0x18
72#define MAX8997_ADC_JIG_USB_2 0x19
73#define MAX8997_ADC_DESKDOCK 0x1a
74#define MAX8997_ADC_JIG_UART 0x1c
75#define MAX8997_ADC_CARDOCK 0x1d
76#define MAX8997_ADC_OPEN 0x1f
77 40
78struct max8997_muic_irq { 41struct max8997_muic_irq {
79 unsigned int irq; 42 unsigned int irq;
@@ -82,61 +45,303 @@ struct max8997_muic_irq {
82}; 45};
83 46
84static struct max8997_muic_irq muic_irqs[] = { 47static struct max8997_muic_irq muic_irqs[] = {
85 { MAX8997_MUICIRQ_ADCError, "muic-ADC_error" }, 48 { MAX8997_MUICIRQ_ADCError, "muic-ADCERROR" },
86 { MAX8997_MUICIRQ_ADCLow, "muic-ADC_low" }, 49 { MAX8997_MUICIRQ_ADCLow, "muic-ADCLOW" },
87 { MAX8997_MUICIRQ_ADC, "muic-ADC" }, 50 { MAX8997_MUICIRQ_ADC, "muic-ADC" },
88 { MAX8997_MUICIRQ_VBVolt, "muic-VB_voltage" }, 51 { MAX8997_MUICIRQ_VBVolt, "muic-VBVOLT" },
89 { MAX8997_MUICIRQ_DBChg, "muic-DB_charger" }, 52 { MAX8997_MUICIRQ_DBChg, "muic-DBCHG" },
90 { MAX8997_MUICIRQ_DCDTmr, "muic-DCD_timer" }, 53 { MAX8997_MUICIRQ_DCDTmr, "muic-DCDTMR" },
91 { MAX8997_MUICIRQ_ChgDetRun, "muic-CDR_status" }, 54 { MAX8997_MUICIRQ_ChgDetRun, "muic-CHGDETRUN" },
92 { MAX8997_MUICIRQ_ChgTyp, "muic-charger_type" }, 55 { MAX8997_MUICIRQ_ChgTyp, "muic-CHGTYP" },
93 { MAX8997_MUICIRQ_OVP, "muic-over_voltage" }, 56 { MAX8997_MUICIRQ_OVP, "muic-OVP" },
57};
58
59/* Define supported cable type */
60enum max8997_muic_acc_type {
61 MAX8997_MUIC_ADC_GROUND = 0x0,
62 MAX8997_MUIC_ADC_MHL, /* MHL*/
63 MAX8997_MUIC_ADC_REMOTE_S1_BUTTON,
64 MAX8997_MUIC_ADC_REMOTE_S2_BUTTON,
65 MAX8997_MUIC_ADC_REMOTE_S3_BUTTON,
66 MAX8997_MUIC_ADC_REMOTE_S4_BUTTON,
67 MAX8997_MUIC_ADC_REMOTE_S5_BUTTON,
68 MAX8997_MUIC_ADC_REMOTE_S6_BUTTON,
69 MAX8997_MUIC_ADC_REMOTE_S7_BUTTON,
70 MAX8997_MUIC_ADC_REMOTE_S8_BUTTON,
71 MAX8997_MUIC_ADC_REMOTE_S9_BUTTON,
72 MAX8997_MUIC_ADC_REMOTE_S10_BUTTON,
73 MAX8997_MUIC_ADC_REMOTE_S11_BUTTON,
74 MAX8997_MUIC_ADC_REMOTE_S12_BUTTON,
75 MAX8997_MUIC_ADC_RESERVED_ACC_1,
76 MAX8997_MUIC_ADC_RESERVED_ACC_2,
77 MAX8997_MUIC_ADC_RESERVED_ACC_3,
78 MAX8997_MUIC_ADC_RESERVED_ACC_4,
79 MAX8997_MUIC_ADC_RESERVED_ACC_5,
80 MAX8997_MUIC_ADC_CEA936_AUDIO,
81 MAX8997_MUIC_ADC_PHONE_POWERED_DEV,
82 MAX8997_MUIC_ADC_TTY_CONVERTER,
83 MAX8997_MUIC_ADC_UART_CABLE,
84 MAX8997_MUIC_ADC_CEA936A_TYPE1_CHG,
85 MAX8997_MUIC_ADC_FACTORY_MODE_USB_OFF, /* JIG-USB-OFF */
86 MAX8997_MUIC_ADC_FACTORY_MODE_USB_ON, /* JIG-USB-ON */
87 MAX8997_MUIC_ADC_AV_CABLE_NOLOAD, /* DESKDOCK */
88 MAX8997_MUIC_ADC_CEA936A_TYPE2_CHG,
89 MAX8997_MUIC_ADC_FACTORY_MODE_UART_OFF, /* JIG-UART */
90 MAX8997_MUIC_ADC_FACTORY_MODE_UART_ON, /* CARDOCK */
91 MAX8997_MUIC_ADC_AUDIO_MODE_REMOTE,
92 MAX8997_MUIC_ADC_OPEN, /* OPEN */
93};
94
95enum max8997_muic_cable_group {
96 MAX8997_CABLE_GROUP_ADC = 0,
97 MAX8997_CABLE_GROUP_ADC_GND,
98 MAX8997_CABLE_GROUP_CHG,
99 MAX8997_CABLE_GROUP_VBVOLT,
100};
101
102enum max8997_muic_usb_type {
103 MAX8997_USB_HOST,
104 MAX8997_USB_DEVICE,
105};
106
107enum max8997_muic_charger_type {
108 MAX8997_CHARGER_TYPE_NONE = 0,
109 MAX8997_CHARGER_TYPE_USB,
110 MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT,
111 MAX8997_CHARGER_TYPE_DEDICATED_CHG,
112 MAX8997_CHARGER_TYPE_500MA,
113 MAX8997_CHARGER_TYPE_1A,
114 MAX8997_CHARGER_TYPE_DEAD_BATTERY = 7,
94}; 115};
95 116
96struct max8997_muic_info { 117struct max8997_muic_info {
97 struct device *dev; 118 struct device *dev;
98 struct i2c_client *muic; 119 struct i2c_client *muic;
99 struct max8997_muic_platform_data *muic_pdata; 120 struct extcon_dev *edev;
121 int prev_cable_type;
122 int prev_chg_type;
123 u8 status[2];
100 124
101 int irq; 125 int irq;
102 struct work_struct irq_work; 126 struct work_struct irq_work;
127 struct mutex mutex;
103 128
129 struct max8997_muic_platform_data *muic_pdata;
104 enum max8997_muic_charger_type pre_charger_type; 130 enum max8997_muic_charger_type pre_charger_type;
105 int pre_adc;
106 131
107 struct mutex mutex; 132 /*
133 * Use delayed workqueue to detect cable state and then
134 * notify cable state to notifiee/platform through uevent.
135 * After completing the booting of platform, the extcon provider
136 * driver should notify cable state to upper layer.
137 */
138 struct delayed_work wq_detcable;
139
140 /*
141 * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
142 * h/w path of COMP2/COMN1 on CONTROL1 register.
143 */
144 int path_usb;
145 int path_uart;
146};
108 147
109 struct extcon_dev *edev; 148enum {
149 EXTCON_CABLE_USB = 0,
150 EXTCON_CABLE_USB_HOST,
151 EXTCON_CABLE_TA,
152 EXTCON_CABLE_FAST_CHARGER,
153 EXTCON_CABLE_SLOW_CHARGER,
154 EXTCON_CABLE_CHARGE_DOWNSTREAM,
155 EXTCON_CABLE_MHL,
156 EXTCON_CABLE_DOCK_DESK,
157 EXTCON_CABLE_DOCK_CARD,
158 EXTCON_CABLE_JIG,
159
160 _EXTCON_CABLE_NUM,
110}; 161};
111 162
112const char *max8997_extcon_cable[] = { 163static const char *max8997_extcon_cable[] = {
113 [0] = "USB", 164 [EXTCON_CABLE_USB] = "USB",
114 [1] = "USB-Host", 165 [EXTCON_CABLE_USB_HOST] = "USB-Host",
115 [2] = "TA", 166 [EXTCON_CABLE_TA] = "TA",
116 [3] = "Fast-charger", 167 [EXTCON_CABLE_FAST_CHARGER] = "Fast-charger",
117 [4] = "Slow-charger", 168 [EXTCON_CABLE_SLOW_CHARGER] = "Slow-charger",
118 [5] = "Charge-downstream", 169 [EXTCON_CABLE_CHARGE_DOWNSTREAM] = "Charge-downstream",
119 [6] = "MHL", 170 [EXTCON_CABLE_MHL] = "MHL",
120 [7] = "Dock-desk", 171 [EXTCON_CABLE_DOCK_DESK] = "Dock-Desk",
121 [8] = "Dock-card", 172 [EXTCON_CABLE_DOCK_CARD] = "Dock-Card",
122 [9] = "JIG", 173 [EXTCON_CABLE_JIG] = "JIG",
123 174
124 NULL, 175 NULL,
125}; 176};
126 177
178/*
179 * max8997_muic_set_debounce_time - Set the debounce time of ADC
180 * @info: the instance including private data of max8997 MUIC
181 * @time: the debounce time of ADC
182 */
183static int max8997_muic_set_debounce_time(struct max8997_muic_info *info,
184 enum max8997_muic_adc_debounce_time time)
185{
186 int ret;
187
188 switch (time) {
189 case ADC_DEBOUNCE_TIME_0_5MS:
190 case ADC_DEBOUNCE_TIME_10MS:
191 case ADC_DEBOUNCE_TIME_25MS:
192 case ADC_DEBOUNCE_TIME_38_62MS:
193 ret = max8997_update_reg(info->muic,
194 MAX8997_MUIC_REG_CONTROL3,
195 time << CONTROL3_ADCDBSET_SHIFT,
196 CONTROL3_ADCDBSET_MASK);
197 if (ret) {
198 dev_err(info->dev, "failed to set ADC debounce time\n");
199 return -EAGAIN;
200 }
201 break;
202 default:
203 dev_err(info->dev, "invalid ADC debounce time\n");
204 return -EINVAL;
205 }
206
207 return 0;
208};
209
210/*
211 * max8997_muic_set_path - Set hardware line according to attached cable
212 * @info: the instance including private data of max8997 MUIC
213 * @value: the path according to attached cable
214 * @attached: the state of cable (true:attached, false:detached)
215 *
216 * The max8997 MUIC device share outside H/W line among a varity of cables,
217 * so this function set internal path of H/W line according to the type of
218 * attached cable.
219 */
220static int max8997_muic_set_path(struct max8997_muic_info *info,
221 u8 val, bool attached)
222{
223 int ret = 0;
224 u8 ctrl1, ctrl2 = 0;
225
226 if (attached)
227 ctrl1 = val;
228 else
229 ctrl1 = CONTROL1_SW_OPEN;
230
231 ret = max8997_update_reg(info->muic,
232 MAX8997_MUIC_REG_CONTROL1, ctrl1, COMP_SW_MASK);
233 if (ret < 0) {
234 dev_err(info->dev, "failed to update MUIC register\n");
235 return -EAGAIN;
236 }
237
238 if (attached)
239 ctrl2 |= CONTROL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */
240 else
241 ctrl2 |= CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */
242
243 ret = max8997_update_reg(info->muic,
244 MAX8997_MUIC_REG_CONTROL2, ctrl2,
245 CONTROL2_LOWPWR_MASK | CONTROL2_CPEN_MASK);
246 if (ret < 0) {
247 dev_err(info->dev, "failed to update MUIC register\n");
248 return -EAGAIN;
249 }
250
251 dev_info(info->dev,
252 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
253 ctrl1, ctrl2, attached ? "attached" : "detached");
254
255 return 0;
256}
257
258/*
259 * max8997_muic_get_cable_type - Return cable type and check cable state
260 * @info: the instance including private data of max8997 MUIC
261 * @group: the path according to attached cable
262 * @attached: store cable state and return
263 *
264 * This function check the cable state either attached or detached,
265 * and then divide precise type of cable according to cable group.
266 * - MAX8997_CABLE_GROUP_ADC
267 * - MAX8997_CABLE_GROUP_CHG
268 */
269static int max8997_muic_get_cable_type(struct max8997_muic_info *info,
270 enum max8997_muic_cable_group group, bool *attached)
271{
272 int cable_type = 0;
273 int adc;
274 int chg_type;
275
276 switch (group) {
277 case MAX8997_CABLE_GROUP_ADC:
278 /*
279 * Read ADC value to check cable type and decide cable state
280 * according to cable type
281 */
282 adc = info->status[0] & STATUS1_ADC_MASK;
283 adc >>= STATUS1_ADC_SHIFT;
284
285 /*
286 * Check current cable state/cable type and store cable type
287 * (info->prev_cable_type) for handling cable when cable is
288 * detached.
289 */
290 if (adc == MAX8997_MUIC_ADC_OPEN) {
291 *attached = false;
292
293 cable_type = info->prev_cable_type;
294 info->prev_cable_type = MAX8997_MUIC_ADC_OPEN;
295 } else {
296 *attached = true;
297
298 cable_type = info->prev_cable_type = adc;
299 }
300 break;
301 case MAX8997_CABLE_GROUP_CHG:
302 /*
303 * Read charger type to check cable type and decide cable state
304 * according to type of charger cable.
305 */
306 chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
307 chg_type >>= STATUS2_CHGTYP_SHIFT;
308
309 if (chg_type == MAX8997_CHARGER_TYPE_NONE) {
310 *attached = false;
311
312 cable_type = info->prev_chg_type;
313 info->prev_chg_type = MAX8997_CHARGER_TYPE_NONE;
314 } else {
315 *attached = true;
316
317 /*
318 * Check current cable state/cable type and store cable
319 * type(info->prev_chg_type) for handling cable when
320 * charger cable is detached.
321 */
322 cable_type = info->prev_chg_type = chg_type;
323 }
324
325 break;
326 default:
327 dev_err(info->dev, "Unknown cable group (%d)\n", group);
328 cable_type = -EINVAL;
329 break;
330 }
331
332 return cable_type;
333}
334
127static int max8997_muic_handle_usb(struct max8997_muic_info *info, 335static int max8997_muic_handle_usb(struct max8997_muic_info *info,
128 enum max8997_muic_usb_type usb_type, bool attached) 336 enum max8997_muic_usb_type usb_type, bool attached)
129{ 337{
130 int ret = 0; 338 int ret = 0;
131 339
132 if (usb_type == MAX8997_USB_HOST) { 340 if (usb_type == MAX8997_USB_HOST) {
133 /* switch to USB */ 341 ret = max8997_muic_set_path(info, info->path_usb, attached);
134 ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL1, 342 if (ret < 0) {
135 attached ? MAX8997_SW_USB : MAX8997_SW_OPEN,
136 SW_MASK);
137 if (ret) {
138 dev_err(info->dev, "failed to update muic register\n"); 343 dev_err(info->dev, "failed to update muic register\n");
139 goto out; 344 return ret;
140 } 345 }
141 } 346 }
142 347
@@ -148,41 +353,39 @@ static int max8997_muic_handle_usb(struct max8997_muic_info *info,
148 extcon_set_cable_state(info->edev, "USB", attached); 353 extcon_set_cable_state(info->edev, "USB", attached);
149 break; 354 break;
150 default: 355 default:
151 ret = -EINVAL; 356 dev_err(info->dev, "failed to detect %s usb cable\n",
152 break; 357 attached ? "attached" : "detached");
358 return -EINVAL;
153 } 359 }
154 360
155out: 361 return 0;
156 return ret;
157} 362}
158 363
159static int max8997_muic_handle_dock(struct max8997_muic_info *info, 364static int max8997_muic_handle_dock(struct max8997_muic_info *info,
160 int adc, bool attached) 365 int cable_type, bool attached)
161{ 366{
162 int ret = 0; 367 int ret = 0;
163 368
164 /* switch to AUDIO */ 369 ret = max8997_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
165 ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL1,
166 attached ? MAX8997_SW_AUDIO : MAX8997_SW_OPEN,
167 SW_MASK);
168 if (ret) { 370 if (ret) {
169 dev_err(info->dev, "failed to update muic register\n"); 371 dev_err(info->dev, "failed to update muic register\n");
170 goto out; 372 return ret;
171 } 373 }
172 374
173 switch (adc) { 375 switch (cable_type) {
174 case MAX8997_ADC_DESKDOCK: 376 case MAX8997_MUIC_ADC_AV_CABLE_NOLOAD:
175 extcon_set_cable_state(info->edev, "Dock-desk", attached); 377 extcon_set_cable_state(info->edev, "Dock-desk", attached);
176 break; 378 break;
177 case MAX8997_ADC_CARDOCK: 379 case MAX8997_MUIC_ADC_FACTORY_MODE_UART_ON:
178 extcon_set_cable_state(info->edev, "Dock-card", attached); 380 extcon_set_cable_state(info->edev, "Dock-card", attached);
179 break; 381 break;
180 default: 382 default:
181 ret = -EINVAL; 383 dev_err(info->dev, "failed to detect %s dock device\n",
182 break; 384 attached ? "attached" : "detached");
385 return -EINVAL;
183 } 386 }
184out: 387
185 return ret; 388 return 0;
186} 389}
187 390
188static int max8997_muic_handle_jig_uart(struct max8997_muic_info *info, 391static int max8997_muic_handle_jig_uart(struct max8997_muic_info *info,
@@ -191,199 +394,188 @@ static int max8997_muic_handle_jig_uart(struct max8997_muic_info *info,
191 int ret = 0; 394 int ret = 0;
192 395
193 /* switch to UART */ 396 /* switch to UART */
194 ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL1, 397 ret = max8997_muic_set_path(info, info->path_uart, attached);
195 attached ? MAX8997_SW_UART : MAX8997_SW_OPEN,
196 SW_MASK);
197 if (ret) { 398 if (ret) {
198 dev_err(info->dev, "failed to update muic register\n"); 399 dev_err(info->dev, "failed to update muic register\n");
199 goto out; 400 return -EINVAL;
200 } 401 }
201 402
202 extcon_set_cable_state(info->edev, "JIG", attached); 403 extcon_set_cable_state(info->edev, "JIG", attached);
203out:
204 return ret;
205}
206
207static int max8997_muic_handle_adc_detach(struct max8997_muic_info *info)
208{
209 int ret = 0;
210 404
211 switch (info->pre_adc) { 405 return 0;
212 case MAX8997_ADC_GROUND:
213 ret = max8997_muic_handle_usb(info, MAX8997_USB_HOST, false);
214 break;
215 case MAX8997_ADC_MHL:
216 extcon_set_cable_state(info->edev, "MHL", false);
217 break;
218 case MAX8997_ADC_JIG_USB_1:
219 case MAX8997_ADC_JIG_USB_2:
220 ret = max8997_muic_handle_usb(info, MAX8997_USB_DEVICE, false);
221 break;
222 case MAX8997_ADC_DESKDOCK:
223 case MAX8997_ADC_CARDOCK:
224 ret = max8997_muic_handle_dock(info, info->pre_adc, false);
225 break;
226 case MAX8997_ADC_JIG_UART:
227 ret = max8997_muic_handle_jig_uart(info, false);
228 break;
229 default:
230 break;
231 }
232
233 return ret;
234} 406}
235 407
236static int max8997_muic_handle_adc(struct max8997_muic_info *info, int adc) 408static int max8997_muic_adc_handler(struct max8997_muic_info *info)
237{ 409{
410 int cable_type;
411 bool attached;
238 int ret = 0; 412 int ret = 0;
239 413
240 switch (adc) { 414 /* Check cable state which is either detached or attached */
241 case MAX8997_ADC_GROUND: 415 cable_type = max8997_muic_get_cable_type(info,
242 ret = max8997_muic_handle_usb(info, MAX8997_USB_HOST, true); 416 MAX8997_CABLE_GROUP_ADC, &attached);
243 break; 417
244 case MAX8997_ADC_MHL: 418 switch (cable_type) {
245 extcon_set_cable_state(info->edev, "MHL", true); 419 case MAX8997_MUIC_ADC_GROUND:
246 break; 420 ret = max8997_muic_handle_usb(info, MAX8997_USB_HOST, attached);
247 case MAX8997_ADC_JIG_USB_1: 421 if (ret < 0)
248 case MAX8997_ADC_JIG_USB_2: 422 return ret;
249 ret = max8997_muic_handle_usb(info, MAX8997_USB_DEVICE, true); 423 break;
250 break; 424 case MAX8997_MUIC_ADC_MHL:
251 case MAX8997_ADC_DESKDOCK: 425 extcon_set_cable_state(info->edev, "MHL", attached);
252 case MAX8997_ADC_CARDOCK: 426 break;
253 ret = max8997_muic_handle_dock(info, adc, true); 427 case MAX8997_MUIC_ADC_FACTORY_MODE_USB_OFF:
254 break; 428 case MAX8997_MUIC_ADC_FACTORY_MODE_USB_ON:
255 case MAX8997_ADC_JIG_UART: 429 ret = max8997_muic_handle_usb(info, MAX8997_USB_DEVICE, attached);
256 ret = max8997_muic_handle_jig_uart(info, true); 430 if (ret < 0)
257 break; 431 return ret;
258 case MAX8997_ADC_OPEN: 432 break;
259 ret = max8997_muic_handle_adc_detach(info); 433 case MAX8997_MUIC_ADC_AV_CABLE_NOLOAD:
260 break; 434 case MAX8997_MUIC_ADC_FACTORY_MODE_UART_ON:
261 default: 435 ret = max8997_muic_handle_dock(info, cable_type, attached);
262 ret = -EINVAL; 436 if (ret < 0)
263 goto out; 437 return ret;
264 } 438 break;
265 439 case MAX8997_MUIC_ADC_FACTORY_MODE_UART_OFF:
266 info->pre_adc = adc; 440 ret = max8997_muic_handle_jig_uart(info, attached);
267out: 441 break;
268 return ret; 442 case MAX8997_MUIC_ADC_REMOTE_S1_BUTTON:
269} 443 case MAX8997_MUIC_ADC_REMOTE_S2_BUTTON:
270 444 case MAX8997_MUIC_ADC_REMOTE_S3_BUTTON:
271static int max8997_muic_handle_charger_type_detach( 445 case MAX8997_MUIC_ADC_REMOTE_S4_BUTTON:
272 struct max8997_muic_info *info) 446 case MAX8997_MUIC_ADC_REMOTE_S5_BUTTON:
273{ 447 case MAX8997_MUIC_ADC_REMOTE_S6_BUTTON:
274 switch (info->pre_charger_type) { 448 case MAX8997_MUIC_ADC_REMOTE_S7_BUTTON:
275 case MAX8997_CHARGER_TYPE_USB: 449 case MAX8997_MUIC_ADC_REMOTE_S8_BUTTON:
276 extcon_set_cable_state(info->edev, "USB", false); 450 case MAX8997_MUIC_ADC_REMOTE_S9_BUTTON:
277 break; 451 case MAX8997_MUIC_ADC_REMOTE_S10_BUTTON:
278 case MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT: 452 case MAX8997_MUIC_ADC_REMOTE_S11_BUTTON:
279 extcon_set_cable_state(info->edev, "Charge-downstream", false); 453 case MAX8997_MUIC_ADC_REMOTE_S12_BUTTON:
280 break; 454 case MAX8997_MUIC_ADC_RESERVED_ACC_1:
281 case MAX8997_CHARGER_TYPE_DEDICATED_CHG: 455 case MAX8997_MUIC_ADC_RESERVED_ACC_2:
282 extcon_set_cable_state(info->edev, "TA", false); 456 case MAX8997_MUIC_ADC_RESERVED_ACC_3:
283 break; 457 case MAX8997_MUIC_ADC_RESERVED_ACC_4:
284 case MAX8997_CHARGER_TYPE_500MA: 458 case MAX8997_MUIC_ADC_RESERVED_ACC_5:
285 extcon_set_cable_state(info->edev, "Slow-charger", false); 459 case MAX8997_MUIC_ADC_CEA936_AUDIO:
286 break; 460 case MAX8997_MUIC_ADC_PHONE_POWERED_DEV:
287 case MAX8997_CHARGER_TYPE_1A: 461 case MAX8997_MUIC_ADC_TTY_CONVERTER:
288 extcon_set_cable_state(info->edev, "Fast-charger", false); 462 case MAX8997_MUIC_ADC_UART_CABLE:
289 break; 463 case MAX8997_MUIC_ADC_CEA936A_TYPE1_CHG:
464 case MAX8997_MUIC_ADC_CEA936A_TYPE2_CHG:
465 case MAX8997_MUIC_ADC_AUDIO_MODE_REMOTE:
466 /*
467 * This cable isn't used in general case if it is specially
468 * needed to detect additional cable, should implement
469 * proper operation when this cable is attached/detached.
470 */
471 dev_info(info->dev,
472 "cable is %s but it isn't used (type:0x%x)\n",
473 attached ? "attached" : "detached", cable_type);
474 return -EAGAIN;
290 default: 475 default:
476 dev_err(info->dev,
477 "failed to detect %s unknown cable (type:0x%x)\n",
478 attached ? "attached" : "detached", cable_type);
291 return -EINVAL; 479 return -EINVAL;
292 break;
293 } 480 }
294 481
295 return 0; 482 return 0;
296} 483}
297 484
298static int max8997_muic_handle_charger_type(struct max8997_muic_info *info, 485static int max8997_muic_chg_handler(struct max8997_muic_info *info)
299 enum max8997_muic_charger_type charger_type)
300{ 486{
301 u8 adc; 487 int chg_type;
302 int ret; 488 bool attached;
489 int adc;
303 490
304 ret = max8997_read_reg(info->muic, MAX8997_MUIC_REG_STATUS1, &adc); 491 chg_type = max8997_muic_get_cable_type(info,
305 if (ret) { 492 MAX8997_CABLE_GROUP_CHG, &attached);
306 dev_err(info->dev, "failed to read muic register\n");
307 goto out;
308 }
309 493
310 switch (charger_type) { 494 switch (chg_type) {
311 case MAX8997_CHARGER_TYPE_NONE: 495 case MAX8997_CHARGER_TYPE_NONE:
312 ret = max8997_muic_handle_charger_type_detach(info);
313 break; 496 break;
314 case MAX8997_CHARGER_TYPE_USB: 497 case MAX8997_CHARGER_TYPE_USB:
315 if ((adc & STATUS1_ADC_MASK) == MAX8997_ADC_OPEN) { 498 adc = info->status[0] & STATUS1_ADC_MASK;
499 adc >>= STATUS1_ADC_SHIFT;
500
501 if ((adc & STATUS1_ADC_MASK) == MAX8997_MUIC_ADC_OPEN) {
316 max8997_muic_handle_usb(info, 502 max8997_muic_handle_usb(info,
317 MAX8997_USB_DEVICE, true); 503 MAX8997_USB_DEVICE, attached);
318 } 504 }
319 break; 505 break;
320 case MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT: 506 case MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT:
321 extcon_set_cable_state(info->edev, "Charge-downstream", true); 507 extcon_set_cable_state(info->edev, "Charge-downstream", attached);
322 break; 508 break;
323 case MAX8997_CHARGER_TYPE_DEDICATED_CHG: 509 case MAX8997_CHARGER_TYPE_DEDICATED_CHG:
324 extcon_set_cable_state(info->edev, "TA", true); 510 extcon_set_cable_state(info->edev, "TA", attached);
325 break; 511 break;
326 case MAX8997_CHARGER_TYPE_500MA: 512 case MAX8997_CHARGER_TYPE_500MA:
327 extcon_set_cable_state(info->edev, "Slow-charger", true); 513 extcon_set_cable_state(info->edev, "Slow-charger", attached);
328 break; 514 break;
329 case MAX8997_CHARGER_TYPE_1A: 515 case MAX8997_CHARGER_TYPE_1A:
330 extcon_set_cable_state(info->edev, "Fast-charger", true); 516 extcon_set_cable_state(info->edev, "Fast-charger", attached);
331 break; 517 break;
332 default: 518 default:
333 ret = -EINVAL; 519 dev_err(info->dev,
334 goto out; 520 "failed to detect %s unknown chg cable (type:0x%x)\n",
521 attached ? "attached" : "detached", chg_type);
522 return -EINVAL;
335 } 523 }
336 524
337 info->pre_charger_type = charger_type; 525 return 0;
338out:
339 return ret;
340} 526}
341 527
342static void max8997_muic_irq_work(struct work_struct *work) 528static void max8997_muic_irq_work(struct work_struct *work)
343{ 529{
344 struct max8997_muic_info *info = container_of(work, 530 struct max8997_muic_info *info = container_of(work,
345 struct max8997_muic_info, irq_work); 531 struct max8997_muic_info, irq_work);
346 u8 status[2];
347 u8 adc, chg_type;
348 int irq_type = 0; 532 int irq_type = 0;
349 int i, ret; 533 int i, ret;
350 534
535 if (!info->edev)
536 return;
537
351 mutex_lock(&info->mutex); 538 mutex_lock(&info->mutex);
352 539
540 for (i = 0 ; i < ARRAY_SIZE(muic_irqs) ; i++)
541 if (info->irq == muic_irqs[i].virq)
542 irq_type = muic_irqs[i].irq;
543
353 ret = max8997_bulk_read(info->muic, MAX8997_MUIC_REG_STATUS1, 544 ret = max8997_bulk_read(info->muic, MAX8997_MUIC_REG_STATUS1,
354 2, status); 545 2, info->status);
355 if (ret) { 546 if (ret) {
356 dev_err(info->dev, "failed to read muic register\n"); 547 dev_err(info->dev, "failed to read muic register\n");
357 mutex_unlock(&info->mutex); 548 mutex_unlock(&info->mutex);
358 return; 549 return;
359 } 550 }
360 551
361 dev_dbg(info->dev, "%s: STATUS1:0x%x, 2:0x%x\n", __func__,
362 status[0], status[1]);
363
364 for (i = 0 ; i < ARRAY_SIZE(muic_irqs) ; i++)
365 if (info->irq == muic_irqs[i].virq)
366 irq_type = muic_irqs[i].irq;
367
368 switch (irq_type) { 552 switch (irq_type) {
553 case MAX8997_MUICIRQ_ADCError:
554 case MAX8997_MUICIRQ_ADCLow:
369 case MAX8997_MUICIRQ_ADC: 555 case MAX8997_MUICIRQ_ADC:
370 adc = status[0] & STATUS1_ADC_MASK; 556 /* Handle all of cable except for charger cable */
371 adc >>= STATUS1_ADC_SHIFT; 557 ret = max8997_muic_adc_handler(info);
372
373 max8997_muic_handle_adc(info, adc);
374 break; 558 break;
559 case MAX8997_MUICIRQ_VBVolt:
560 case MAX8997_MUICIRQ_DBChg:
561 case MAX8997_MUICIRQ_DCDTmr:
562 case MAX8997_MUICIRQ_ChgDetRun:
375 case MAX8997_MUICIRQ_ChgTyp: 563 case MAX8997_MUICIRQ_ChgTyp:
376 chg_type = status[1] & STATUS2_CHGTYP_MASK; 564 /* Handle charger cable */
377 chg_type >>= STATUS2_CHGTYP_SHIFT; 565 ret = max8997_muic_chg_handler(info);
378 566 break;
379 max8997_muic_handle_charger_type(info, chg_type); 567 case MAX8997_MUICIRQ_OVP:
380 break; 568 break;
381 default: 569 default:
382 dev_info(info->dev, "misc interrupt: irq %d occurred\n", 570 dev_info(info->dev, "misc interrupt: irq %d occurred\n",
383 irq_type); 571 irq_type);
384 break; 572 mutex_unlock(&info->mutex);
573 return;
385 } 574 }
386 575
576 if (ret < 0)
577 dev_err(info->dev, "failed to handle MUIC interrupt\n");
578
387 mutex_unlock(&info->mutex); 579 mutex_unlock(&info->mutex);
388 580
389 return; 581 return;
@@ -401,29 +593,60 @@ static irqreturn_t max8997_muic_irq_handler(int irq, void *data)
401 return IRQ_HANDLED; 593 return IRQ_HANDLED;
402} 594}
403 595
404static void max8997_muic_detect_dev(struct max8997_muic_info *info) 596static int max8997_muic_detect_dev(struct max8997_muic_info *info)
405{ 597{
406 int ret; 598 int ret = 0;
407 u8 status[2], adc, chg_type; 599 int adc;
600 int chg_type;
601 bool attached;
408 602
409 ret = max8997_bulk_read(info->muic, MAX8997_MUIC_REG_STATUS1, 603 mutex_lock(&info->mutex);
410 2, status); 604
605 /* Read STATUSx register to detect accessory */
606 ret = max8997_bulk_read(info->muic,
607 MAX8997_MUIC_REG_STATUS1, 2, info->status);
411 if (ret) { 608 if (ret) {
412 dev_err(info->dev, "failed to read muic register\n"); 609 dev_err(info->dev, "failed to read MUIC register\n");
413 return; 610 mutex_unlock(&info->mutex);
611 return -EINVAL;
414 } 612 }
415 613
416 dev_info(info->dev, "STATUS1:0x%x, STATUS2:0x%x\n", 614 adc = max8997_muic_get_cable_type(info, MAX8997_CABLE_GROUP_ADC,
417 status[0], status[1]); 615 &attached);
616 if (attached && adc != MAX8997_MUIC_ADC_OPEN) {
617 ret = max8997_muic_adc_handler(info);
618 if (ret < 0) {
619 dev_err(info->dev, "Cannot detect ADC cable\n");
620 mutex_unlock(&info->mutex);
621 return ret;
622 }
623 }
418 624
419 adc = status[0] & STATUS1_ADC_MASK; 625 chg_type = max8997_muic_get_cable_type(info, MAX8997_CABLE_GROUP_CHG,
420 adc >>= STATUS1_ADC_SHIFT; 626 &attached);
627 if (attached && chg_type != MAX8997_CHARGER_TYPE_NONE) {
628 ret = max8997_muic_chg_handler(info);
629 if (ret < 0) {
630 dev_err(info->dev, "Cannot detect charger cable\n");
631 mutex_unlock(&info->mutex);
632 return ret;
633 }
634 }
635
636 mutex_unlock(&info->mutex);
637
638 return 0;
639}
421 640
422 chg_type = status[1] & STATUS2_CHGTYP_MASK; 641static void max8997_muic_detect_cable_wq(struct work_struct *work)
423 chg_type >>= STATUS2_CHGTYP_SHIFT; 642{
643 struct max8997_muic_info *info = container_of(to_delayed_work(work),
644 struct max8997_muic_info, wq_detcable);
645 int ret;
424 646
425 max8997_muic_handle_adc(info, adc); 647 ret = max8997_muic_detect_dev(info);
426 max8997_muic_handle_charger_type(info, chg_type); 648 if (ret < 0)
649 pr_err("failed to detect cable type\n");
427} 650}
428 651
429static int max8997_muic_probe(struct platform_device *pdev) 652static int max8997_muic_probe(struct platform_device *pdev)
@@ -431,6 +654,7 @@ static int max8997_muic_probe(struct platform_device *pdev)
431 struct max8997_dev *max8997 = dev_get_drvdata(pdev->dev.parent); 654 struct max8997_dev *max8997 = dev_get_drvdata(pdev->dev.parent);
432 struct max8997_platform_data *pdata = dev_get_platdata(max8997->dev); 655 struct max8997_platform_data *pdata = dev_get_platdata(max8997->dev);
433 struct max8997_muic_info *info; 656 struct max8997_muic_info *info;
657 int delay_jiffies;
434 int ret, i; 658 int ret, i;
435 659
436 info = devm_kzalloc(&pdev->dev, sizeof(struct max8997_muic_info), 660 info = devm_kzalloc(&pdev->dev, sizeof(struct max8997_muic_info),
@@ -459,8 +683,10 @@ static int max8997_muic_probe(struct platform_device *pdev)
459 } 683 }
460 muic_irq->virq = virq; 684 muic_irq->virq = virq;
461 685
462 ret = request_threaded_irq(virq, NULL, max8997_muic_irq_handler, 686 ret = request_threaded_irq(virq, NULL,
463 0, muic_irq->name, info); 687 max8997_muic_irq_handler,
688 IRQF_NO_SUSPEND,
689 muic_irq->name, info);
464 if (ret) { 690 if (ret) {
465 dev_err(&pdev->dev, 691 dev_err(&pdev->dev,
466 "failed: irq request (IRQ: %d," 692 "failed: irq request (IRQ: %d,"
@@ -496,10 +722,42 @@ static int max8997_muic_probe(struct platform_device *pdev)
496 } 722 }
497 } 723 }
498 724
499 /* Initial device detection */ 725 /*
500 max8997_muic_detect_dev(info); 726 * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
727 * h/w path of COMP2/COMN1 on CONTROL1 register.
728 */
729 if (pdata->muic_pdata->path_uart)
730 info->path_uart = pdata->muic_pdata->path_uart;
731 else
732 info->path_uart = CONTROL1_SW_UART;
733
734 if (pdata->muic_pdata->path_usb)
735 info->path_usb = pdata->muic_pdata->path_usb;
736 else
737 info->path_usb = CONTROL1_SW_USB;
738
739 /* Set initial path for UART */
740 max8997_muic_set_path(info, info->path_uart, true);
741
742 /* Set ADC debounce time */
743 max8997_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
744
745 /*
746 * Detect accessory after completing the initialization of platform
747 *
748 * - Use delayed workqueue to detect cable state and then
749 * notify cable state to notifiee/platform through uevent.
750 * After completing the booting of platform, the extcon provider
751 * driver should notify cable state to upper layer.
752 */
753 INIT_DELAYED_WORK(&info->wq_detcable, max8997_muic_detect_cable_wq);
754 if (pdata->muic_pdata->detcable_delay_ms)
755 delay_jiffies = msecs_to_jiffies(pdata->muic_pdata->detcable_delay_ms);
756 else
757 delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
758 schedule_delayed_work(&info->wq_detcable, delay_jiffies);
501 759
502 return ret; 760 return 0;
503 761
504err_irq: 762err_irq:
505 while (--i >= 0) 763 while (--i >= 0)
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-23 11:35:18 -0500