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a830d28b JZ |
1 | /* |
2 | * Battery driver for Marvell 88PM860x PMIC | |
3 | * | |
4 | * Copyright (c) 2012 Marvell International Ltd. | |
5 | * Author: Jett Zhou <jtzhou@marvell.com> | |
6 | * Haojian Zhuang <haojian.zhuang@marvell.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | */ | |
12 | ||
13 | #include <linux/kernel.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/platform_device.h> | |
16 | #include <linux/slab.h> | |
17 | #include <linux/mutex.h> | |
18 | #include <linux/string.h> | |
19 | #include <linux/power_supply.h> | |
20 | #include <linux/mfd/88pm860x.h> | |
21 | #include <linux/delay.h> | |
22 | ||
23 | /* bit definitions of Status Query Interface 2 */ | |
24 | #define STATUS2_CHG (1 << 2) | |
25 | #define STATUS2_BAT (1 << 3) | |
26 | #define STATUS2_VBUS (1 << 4) | |
27 | ||
28 | /* bit definitions of Measurement Enable 1 Register */ | |
29 | #define MEAS1_TINT (1 << 3) | |
30 | #define MEAS1_GP1 (1 << 5) | |
31 | ||
32 | /* bit definitions of Measurement Enable 3 Register */ | |
33 | #define MEAS3_IBAT (1 << 0) | |
34 | #define MEAS3_BAT_DET (1 << 1) | |
35 | #define MEAS3_CC (1 << 2) | |
36 | ||
37 | /* bit definitions of Measurement Off Time Register */ | |
38 | #define MEAS_OFF_SLEEP_EN (1 << 1) | |
39 | ||
40 | /* bit definitions of GPADC Bias Current 2 Register */ | |
41 | #define GPBIAS2_GPADC1_SET (2 << 4) | |
42 | /* GPADC1 Bias Current value in uA unit */ | |
43 | #define GPBIAS2_GPADC1_UA ((GPBIAS2_GPADC1_SET >> 4) * 5 + 1) | |
44 | ||
45 | /* bit definitions of GPADC Misc 1 Register */ | |
46 | #define GPMISC1_GPADC_EN (1 << 0) | |
47 | ||
48 | /* bit definitions of Charger Control 6 Register */ | |
49 | #define CC6_BAT_DET_GPADC1 1 | |
50 | ||
51 | /* bit definitions of Coulomb Counter Reading Register */ | |
52 | #define CCNT_AVG_SEL (4 << 3) | |
53 | ||
54 | /* bit definitions of RTC miscellaneous Register1 */ | |
55 | #define RTC_SOC_5LSB (0x1F << 3) | |
56 | ||
57 | /* bit definitions of RTC Register1 */ | |
58 | #define RTC_SOC_3MSB (0x7) | |
59 | ||
60 | /* bit definitions of Power up Log register */ | |
61 | #define BAT_WU_LOG (1<<6) | |
62 | ||
63 | /* coulomb counter index */ | |
64 | #define CCNT_POS1 0 | |
65 | #define CCNT_POS2 1 | |
66 | #define CCNT_NEG1 2 | |
67 | #define CCNT_NEG2 3 | |
68 | #define CCNT_SPOS 4 | |
69 | #define CCNT_SNEG 5 | |
70 | ||
71 | /* OCV -- Open Circuit Voltage */ | |
72 | #define OCV_MODE_ACTIVE 0 | |
73 | #define OCV_MODE_SLEEP 1 | |
74 | ||
75 | /* Vbat range of CC for measuring Rbat */ | |
76 | #define LOW_BAT_THRESHOLD 3600 | |
77 | #define VBATT_RESISTOR_MIN 3800 | |
78 | #define VBATT_RESISTOR_MAX 4100 | |
79 | ||
80 | /* TBAT for batt, TINT for chip itself */ | |
81 | #define PM860X_TEMP_TINT (0) | |
82 | #define PM860X_TEMP_TBAT (1) | |
83 | ||
84 | /* | |
85 | * Battery temperature based on NTC resistor, defined | |
86 | * corresponding resistor value -- Ohm / C degeree. | |
87 | */ | |
88 | #define TBAT_NEG_25D 127773 /* -25 */ | |
89 | #define TBAT_NEG_10D 54564 /* -10 */ | |
90 | #define TBAT_0D 32330 /* 0 */ | |
91 | #define TBAT_10D 19785 /* 10 */ | |
92 | #define TBAT_20D 12468 /* 20 */ | |
93 | #define TBAT_30D 8072 /* 30 */ | |
94 | #define TBAT_40D 5356 /* 40 */ | |
95 | ||
96 | struct pm860x_battery_info { | |
97 | struct pm860x_chip *chip; | |
98 | struct i2c_client *i2c; | |
99 | struct device *dev; | |
100 | ||
297d716f | 101 | struct power_supply *battery; |
a830d28b JZ |
102 | struct mutex lock; |
103 | int status; | |
104 | int irq_cc; | |
105 | int irq_batt; | |
106 | int max_capacity; | |
107 | int resistor; /* Battery Internal Resistor */ | |
108 | int last_capacity; | |
109 | int start_soc; | |
110 | unsigned present:1; | |
111 | unsigned temp_type:1; /* TINT or TBAT */ | |
112 | }; | |
113 | ||
114 | struct ccnt { | |
115 | unsigned long long int pos; | |
116 | unsigned long long int neg; | |
117 | unsigned int spos; | |
118 | unsigned int sneg; | |
119 | ||
120 | int total_chg; /* mAh(3.6C) */ | |
121 | int total_dischg; /* mAh(3.6C) */ | |
122 | }; | |
123 | ||
124 | /* | |
125 | * State of Charge. | |
126 | * The first number is mAh(=3.6C), and the second number is percent point. | |
127 | */ | |
f1ade352 | 128 | static int array_soc[][2] = { |
a830d28b JZ |
129 | {4170, 100}, {4154, 99}, {4136, 98}, {4122, 97}, {4107, 96}, |
130 | {4102, 95}, {4088, 94}, {4081, 93}, {4070, 92}, {4060, 91}, | |
131 | {4053, 90}, {4044, 89}, {4035, 88}, {4028, 87}, {4019, 86}, | |
132 | {4013, 85}, {4006, 84}, {3995, 83}, {3987, 82}, {3982, 81}, | |
133 | {3976, 80}, {3968, 79}, {3962, 78}, {3954, 77}, {3946, 76}, | |
134 | {3941, 75}, {3934, 74}, {3929, 73}, {3922, 72}, {3916, 71}, | |
135 | {3910, 70}, {3904, 69}, {3898, 68}, {3892, 67}, {3887, 66}, | |
136 | {3880, 65}, {3874, 64}, {3868, 63}, {3862, 62}, {3854, 61}, | |
137 | {3849, 60}, {3843, 59}, {3840, 58}, {3833, 57}, {3829, 56}, | |
138 | {3824, 55}, {3818, 54}, {3815, 53}, {3810, 52}, {3808, 51}, | |
139 | {3804, 50}, {3801, 49}, {3798, 48}, {3796, 47}, {3792, 46}, | |
140 | {3789, 45}, {3785, 44}, {3784, 43}, {3782, 42}, {3780, 41}, | |
141 | {3777, 40}, {3776, 39}, {3774, 38}, {3772, 37}, {3771, 36}, | |
142 | {3769, 35}, {3768, 34}, {3764, 33}, {3763, 32}, {3760, 31}, | |
143 | {3760, 30}, {3754, 29}, {3750, 28}, {3749, 27}, {3744, 26}, | |
144 | {3740, 25}, {3734, 24}, {3732, 23}, {3728, 22}, {3726, 21}, | |
145 | {3720, 20}, {3716, 19}, {3709, 18}, {3703, 17}, {3698, 16}, | |
146 | {3692, 15}, {3683, 14}, {3675, 13}, {3670, 12}, {3665, 11}, | |
147 | {3661, 10}, {3649, 9}, {3637, 8}, {3622, 7}, {3609, 6}, | |
148 | {3580, 5}, {3558, 4}, {3540, 3}, {3510, 2}, {3429, 1}, | |
149 | }; | |
150 | ||
151 | static struct ccnt ccnt_data; | |
152 | ||
153 | /* | |
154 | * register 1 bit[7:0] -- bit[11:4] of measured value of voltage | |
155 | * register 0 bit[3:0] -- bit[3:0] of measured value of voltage | |
156 | */ | |
157 | static int measure_12bit_voltage(struct pm860x_battery_info *info, | |
158 | int offset, int *data) | |
159 | { | |
160 | unsigned char buf[2]; | |
161 | int ret; | |
162 | ||
163 | ret = pm860x_bulk_read(info->i2c, offset, 2, buf); | |
164 | if (ret < 0) | |
165 | return ret; | |
166 | ||
167 | *data = ((buf[0] & 0xff) << 4) | (buf[1] & 0x0f); | |
168 | /* V_MEAS(mV) = data * 1.8 * 1000 / (2^12) */ | |
169 | *data = ((*data & 0xfff) * 9 * 25) >> 9; | |
170 | return 0; | |
171 | } | |
172 | ||
173 | static int measure_vbatt(struct pm860x_battery_info *info, int state, | |
174 | int *data) | |
175 | { | |
176 | unsigned char buf[5]; | |
177 | int ret; | |
178 | ||
179 | switch (state) { | |
180 | case OCV_MODE_ACTIVE: | |
181 | ret = measure_12bit_voltage(info, PM8607_VBAT_MEAS1, data); | |
182 | if (ret) | |
183 | return ret; | |
184 | /* V_BATT_MEAS(mV) = value * 3 * 1.8 * 1000 / (2^12) */ | |
185 | *data *= 3; | |
186 | break; | |
187 | case OCV_MODE_SLEEP: | |
188 | /* | |
189 | * voltage value of VBATT in sleep mode is saved in different | |
190 | * registers. | |
191 | * bit[11:10] -- bit[7:6] of LDO9(0x18) | |
192 | * bit[9:8] -- bit[7:6] of LDO8(0x17) | |
193 | * bit[7:6] -- bit[7:6] of LDO7(0x16) | |
194 | * bit[5:4] -- bit[7:6] of LDO6(0x15) | |
195 | * bit[3:0] -- bit[7:4] of LDO5(0x14) | |
196 | */ | |
197 | ret = pm860x_bulk_read(info->i2c, PM8607_LDO5, 5, buf); | |
198 | if (ret < 0) | |
199 | return ret; | |
200 | ret = ((buf[4] >> 6) << 10) | ((buf[3] >> 6) << 8) | |
201 | | ((buf[2] >> 6) << 6) | ((buf[1] >> 6) << 4) | |
202 | | (buf[0] >> 4); | |
203 | /* V_BATT_MEAS(mV) = data * 3 * 1.8 * 1000 / (2^12) */ | |
204 | *data = ((*data & 0xff) * 27 * 25) >> 9; | |
205 | break; | |
206 | default: | |
207 | return -EINVAL; | |
208 | } | |
209 | return 0; | |
210 | } | |
211 | ||
212 | /* | |
213 | * Return value is signed data. | |
214 | * Negative value means discharging, and positive value means charging. | |
215 | */ | |
216 | static int measure_current(struct pm860x_battery_info *info, int *data) | |
217 | { | |
218 | unsigned char buf[2]; | |
219 | short s; | |
220 | int ret; | |
221 | ||
222 | ret = pm860x_bulk_read(info->i2c, PM8607_IBAT_MEAS1, 2, buf); | |
223 | if (ret < 0) | |
224 | return ret; | |
225 | ||
226 | s = ((buf[0] & 0xff) << 8) | (buf[1] & 0xff); | |
227 | /* current(mA) = value * 0.125 */ | |
228 | *data = s >> 3; | |
229 | return 0; | |
230 | } | |
231 | ||
232 | static int set_charger_current(struct pm860x_battery_info *info, int data, | |
233 | int *old) | |
234 | { | |
235 | int ret; | |
236 | ||
237 | if (data < 50 || data > 1600 || !old) | |
238 | return -EINVAL; | |
239 | ||
240 | data = ((data - 50) / 50) & 0x1f; | |
241 | *old = pm860x_reg_read(info->i2c, PM8607_CHG_CTRL2); | |
242 | *old = (*old & 0x1f) * 50 + 50; | |
243 | ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL2, 0x1f, data); | |
244 | if (ret < 0) | |
245 | return ret; | |
246 | return 0; | |
247 | } | |
248 | ||
249 | static int read_ccnt(struct pm860x_battery_info *info, int offset, | |
250 | int *ccnt) | |
251 | { | |
252 | unsigned char buf[2]; | |
253 | int ret; | |
254 | ||
255 | ret = pm860x_set_bits(info->i2c, PM8607_CCNT, 7, offset & 7); | |
256 | if (ret < 0) | |
257 | goto out; | |
258 | ret = pm860x_bulk_read(info->i2c, PM8607_CCNT_MEAS1, 2, buf); | |
259 | if (ret < 0) | |
260 | goto out; | |
261 | *ccnt = ((buf[0] & 0xff) << 8) | (buf[1] & 0xff); | |
262 | return 0; | |
263 | out: | |
264 | return ret; | |
265 | } | |
266 | ||
267 | static int calc_ccnt(struct pm860x_battery_info *info, struct ccnt *ccnt) | |
268 | { | |
269 | unsigned int sum; | |
270 | int ret; | |
271 | int data; | |
272 | ||
273 | ret = read_ccnt(info, CCNT_POS1, &data); | |
274 | if (ret) | |
275 | goto out; | |
276 | sum = data & 0xffff; | |
277 | ret = read_ccnt(info, CCNT_POS2, &data); | |
278 | if (ret) | |
279 | goto out; | |
280 | sum |= (data & 0xffff) << 16; | |
281 | ccnt->pos += sum; | |
282 | ||
283 | ret = read_ccnt(info, CCNT_NEG1, &data); | |
284 | if (ret) | |
285 | goto out; | |
286 | sum = data & 0xffff; | |
287 | ret = read_ccnt(info, CCNT_NEG2, &data); | |
288 | if (ret) | |
289 | goto out; | |
290 | sum |= (data & 0xffff) << 16; | |
291 | sum = ~sum + 1; /* since it's negative */ | |
292 | ccnt->neg += sum; | |
293 | ||
294 | ret = read_ccnt(info, CCNT_SPOS, &data); | |
295 | if (ret) | |
296 | goto out; | |
297 | ccnt->spos += data; | |
298 | ret = read_ccnt(info, CCNT_SNEG, &data); | |
299 | if (ret) | |
300 | goto out; | |
301 | ||
302 | /* | |
303 | * charge(mAh) = count * 1.6984 * 1e(-8) | |
304 | * = count * 16984 * 1.024 * 1.024 * 1.024 / (2 ^ 40) | |
305 | * = count * 18236 / (2 ^ 40) | |
306 | */ | |
307 | ccnt->total_chg = (int) ((ccnt->pos * 18236) >> 40); | |
308 | ccnt->total_dischg = (int) ((ccnt->neg * 18236) >> 40); | |
309 | return 0; | |
310 | out: | |
311 | return ret; | |
312 | } | |
313 | ||
314 | static int clear_ccnt(struct pm860x_battery_info *info, struct ccnt *ccnt) | |
315 | { | |
316 | int data; | |
317 | ||
318 | memset(ccnt, 0, sizeof(*ccnt)); | |
319 | /* read to clear ccnt */ | |
320 | read_ccnt(info, CCNT_POS1, &data); | |
321 | read_ccnt(info, CCNT_POS2, &data); | |
322 | read_ccnt(info, CCNT_NEG1, &data); | |
323 | read_ccnt(info, CCNT_NEG2, &data); | |
324 | read_ccnt(info, CCNT_SPOS, &data); | |
325 | read_ccnt(info, CCNT_SNEG, &data); | |
326 | return 0; | |
327 | } | |
328 | ||
329 | /* Calculate Open Circuit Voltage */ | |
330 | static int calc_ocv(struct pm860x_battery_info *info, int *ocv) | |
331 | { | |
332 | int ret; | |
333 | int i; | |
334 | int data; | |
335 | int vbatt_avg; | |
336 | int vbatt_sum; | |
337 | int ibatt_avg; | |
338 | int ibatt_sum; | |
339 | ||
340 | if (!ocv) | |
341 | return -EINVAL; | |
342 | ||
343 | for (i = 0, ibatt_sum = 0, vbatt_sum = 0; i < 10; i++) { | |
344 | ret = measure_vbatt(info, OCV_MODE_ACTIVE, &data); | |
345 | if (ret) | |
346 | goto out; | |
347 | vbatt_sum += data; | |
348 | ret = measure_current(info, &data); | |
349 | if (ret) | |
350 | goto out; | |
351 | ibatt_sum += data; | |
352 | } | |
353 | vbatt_avg = vbatt_sum / 10; | |
354 | ibatt_avg = ibatt_sum / 10; | |
355 | ||
356 | mutex_lock(&info->lock); | |
357 | if (info->present) | |
358 | *ocv = vbatt_avg - ibatt_avg * info->resistor / 1000; | |
359 | else | |
360 | *ocv = vbatt_avg; | |
361 | mutex_unlock(&info->lock); | |
362 | dev_dbg(info->dev, "VBAT average:%d, OCV:%d\n", vbatt_avg, *ocv); | |
363 | return 0; | |
364 | out: | |
365 | return ret; | |
366 | } | |
367 | ||
368 | /* Calculate State of Charge (percent points) */ | |
369 | static int calc_soc(struct pm860x_battery_info *info, int state, int *soc) | |
370 | { | |
371 | int i; | |
372 | int ocv; | |
373 | int count; | |
374 | int ret = -EINVAL; | |
375 | ||
376 | if (!soc) | |
377 | return -EINVAL; | |
378 | ||
379 | switch (state) { | |
380 | case OCV_MODE_ACTIVE: | |
381 | ret = calc_ocv(info, &ocv); | |
382 | break; | |
383 | case OCV_MODE_SLEEP: | |
384 | ret = measure_vbatt(info, OCV_MODE_SLEEP, &ocv); | |
385 | break; | |
386 | } | |
387 | if (ret) | |
388 | return ret; | |
389 | ||
390 | count = ARRAY_SIZE(array_soc); | |
391 | if (ocv < array_soc[count - 1][0]) { | |
392 | *soc = 0; | |
393 | return 0; | |
394 | } | |
395 | ||
396 | for (i = 0; i < count; i++) { | |
397 | if (ocv >= array_soc[i][0]) { | |
398 | *soc = array_soc[i][1]; | |
399 | break; | |
400 | } | |
401 | } | |
402 | return 0; | |
403 | } | |
404 | ||
405 | static irqreturn_t pm860x_coulomb_handler(int irq, void *data) | |
406 | { | |
407 | struct pm860x_battery_info *info = data; | |
408 | ||
409 | calc_ccnt(info, &ccnt_data); | |
410 | return IRQ_HANDLED; | |
411 | } | |
412 | ||
413 | static irqreturn_t pm860x_batt_handler(int irq, void *data) | |
414 | { | |
415 | struct pm860x_battery_info *info = data; | |
416 | int ret; | |
417 | ||
418 | mutex_lock(&info->lock); | |
419 | ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2); | |
420 | if (ret & STATUS2_BAT) { | |
421 | info->present = 1; | |
422 | info->temp_type = PM860X_TEMP_TBAT; | |
423 | } else { | |
424 | info->present = 0; | |
425 | info->temp_type = PM860X_TEMP_TINT; | |
426 | } | |
427 | mutex_unlock(&info->lock); | |
428 | /* clear ccnt since battery is attached or dettached */ | |
429 | clear_ccnt(info, &ccnt_data); | |
430 | return IRQ_HANDLED; | |
431 | } | |
432 | ||
433 | static void pm860x_init_battery(struct pm860x_battery_info *info) | |
434 | { | |
435 | unsigned char buf[2]; | |
436 | int ret; | |
437 | int data; | |
438 | int bat_remove; | |
439 | int soc; | |
440 | ||
441 | /* measure enable on GPADC1 */ | |
442 | data = MEAS1_GP1; | |
443 | if (info->temp_type == PM860X_TEMP_TINT) | |
444 | data |= MEAS1_TINT; | |
445 | ret = pm860x_set_bits(info->i2c, PM8607_MEAS_EN1, data, data); | |
446 | if (ret) | |
447 | goto out; | |
448 | ||
449 | /* measure enable on IBAT, BAT_DET, CC. IBAT is depend on CC. */ | |
450 | data = MEAS3_IBAT | MEAS3_BAT_DET | MEAS3_CC; | |
451 | ret = pm860x_set_bits(info->i2c, PM8607_MEAS_EN3, data, data); | |
452 | if (ret) | |
453 | goto out; | |
454 | ||
455 | /* measure disable CC in sleep time */ | |
456 | ret = pm860x_reg_write(info->i2c, PM8607_MEAS_OFF_TIME1, 0x82); | |
457 | if (ret) | |
458 | goto out; | |
459 | ret = pm860x_reg_write(info->i2c, PM8607_MEAS_OFF_TIME2, 0x6c); | |
460 | if (ret) | |
461 | goto out; | |
462 | ||
463 | /* enable GPADC */ | |
464 | ret = pm860x_set_bits(info->i2c, PM8607_GPADC_MISC1, | |
465 | GPMISC1_GPADC_EN, GPMISC1_GPADC_EN); | |
466 | if (ret < 0) | |
467 | goto out; | |
468 | ||
469 | /* detect battery via GPADC1 */ | |
470 | ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL6, | |
471 | CC6_BAT_DET_GPADC1, CC6_BAT_DET_GPADC1); | |
472 | if (ret < 0) | |
473 | goto out; | |
474 | ||
475 | ret = pm860x_set_bits(info->i2c, PM8607_CCNT, 7 << 3, | |
476 | CCNT_AVG_SEL); | |
477 | if (ret < 0) | |
478 | goto out; | |
479 | ||
480 | /* set GPADC1 bias */ | |
481 | ret = pm860x_set_bits(info->i2c, PM8607_GP_BIAS2, 0xF << 4, | |
482 | GPBIAS2_GPADC1_SET); | |
483 | if (ret < 0) | |
484 | goto out; | |
485 | ||
486 | /* check whether battery present) */ | |
487 | mutex_lock(&info->lock); | |
488 | ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2); | |
489 | if (ret < 0) { | |
490 | mutex_unlock(&info->lock); | |
491 | goto out; | |
492 | } | |
493 | if (ret & STATUS2_BAT) { | |
494 | info->present = 1; | |
495 | info->temp_type = PM860X_TEMP_TBAT; | |
496 | } else { | |
497 | info->present = 0; | |
498 | info->temp_type = PM860X_TEMP_TINT; | |
499 | } | |
500 | mutex_unlock(&info->lock); | |
501 | ||
502 | calc_soc(info, OCV_MODE_ACTIVE, &soc); | |
503 | ||
504 | data = pm860x_reg_read(info->i2c, PM8607_POWER_UP_LOG); | |
505 | bat_remove = data & BAT_WU_LOG; | |
506 | ||
507 | dev_dbg(info->dev, "battery wake up? %s\n", | |
508 | bat_remove != 0 ? "yes" : "no"); | |
509 | ||
510 | /* restore SOC from RTC domain register */ | |
511 | if (bat_remove == 0) { | |
512 | buf[0] = pm860x_reg_read(info->i2c, PM8607_RTC_MISC2); | |
513 | buf[1] = pm860x_reg_read(info->i2c, PM8607_RTC1); | |
514 | data = ((buf[1] & 0x3) << 5) | ((buf[0] >> 3) & 0x1F); | |
515 | if (data > soc + 15) | |
516 | info->start_soc = soc; | |
517 | else if (data < soc - 15) | |
518 | info->start_soc = soc; | |
519 | else | |
520 | info->start_soc = data; | |
521 | dev_dbg(info->dev, "soc_rtc %d, soc_ocv :%d\n", data, soc); | |
522 | } else { | |
523 | pm860x_set_bits(info->i2c, PM8607_POWER_UP_LOG, | |
524 | BAT_WU_LOG, BAT_WU_LOG); | |
525 | info->start_soc = soc; | |
526 | } | |
527 | info->last_capacity = info->start_soc; | |
528 | dev_dbg(info->dev, "init soc : %d\n", info->last_capacity); | |
529 | out: | |
530 | return; | |
531 | } | |
532 | ||
533 | static void set_temp_threshold(struct pm860x_battery_info *info, | |
534 | int min, int max) | |
535 | { | |
536 | int data; | |
537 | ||
538 | /* (tmp << 8) / 1800 */ | |
539 | if (min <= 0) | |
540 | data = 0; | |
541 | else | |
542 | data = (min << 8) / 1800; | |
543 | pm860x_reg_write(info->i2c, PM8607_GPADC1_HIGHTH, data); | |
544 | dev_dbg(info->dev, "TEMP_HIGHTH : min: %d, 0x%x\n", min, data); | |
545 | ||
546 | if (max <= 0) | |
547 | data = 0xff; | |
548 | else | |
549 | data = (max << 8) / 1800; | |
550 | pm860x_reg_write(info->i2c, PM8607_GPADC1_LOWTH, data); | |
551 | dev_dbg(info->dev, "TEMP_LOWTH:max : %d, 0x%x\n", max, data); | |
552 | } | |
553 | ||
554 | static int measure_temp(struct pm860x_battery_info *info, int *data) | |
555 | { | |
556 | int ret; | |
557 | int temp; | |
558 | int min; | |
559 | int max; | |
560 | ||
561 | if (info->temp_type == PM860X_TEMP_TINT) { | |
562 | ret = measure_12bit_voltage(info, PM8607_TINT_MEAS1, data); | |
563 | if (ret) | |
564 | return ret; | |
565 | *data = (*data - 884) * 1000 / 3611; | |
566 | } else { | |
567 | ret = measure_12bit_voltage(info, PM8607_GPADC1_MEAS1, data); | |
568 | if (ret) | |
569 | return ret; | |
570 | /* meausered Vtbat(mV) / Ibias_current(11uA)*/ | |
571 | *data = (*data * 1000) / GPBIAS2_GPADC1_UA; | |
572 | ||
573 | if (*data > TBAT_NEG_25D) { | |
574 | temp = -30; /* over cold , suppose -30 roughly */ | |
575 | max = TBAT_NEG_10D * GPBIAS2_GPADC1_UA / 1000; | |
576 | set_temp_threshold(info, 0, max); | |
577 | } else if (*data > TBAT_NEG_10D) { | |
578 | temp = -15; /* -15 degree, code */ | |
579 | max = TBAT_NEG_10D * GPBIAS2_GPADC1_UA / 1000; | |
580 | set_temp_threshold(info, 0, max); | |
581 | } else if (*data > TBAT_0D) { | |
582 | temp = -5; /* -5 degree */ | |
583 | min = TBAT_NEG_10D * GPBIAS2_GPADC1_UA / 1000; | |
584 | max = TBAT_40D * GPBIAS2_GPADC1_UA / 1000; | |
585 | set_temp_threshold(info, min, max); | |
586 | } else if (*data > TBAT_10D) { | |
587 | temp = 5; /* in range of (0, 10) */ | |
588 | min = TBAT_NEG_10D * GPBIAS2_GPADC1_UA / 1000; | |
589 | max = TBAT_40D * GPBIAS2_GPADC1_UA / 1000; | |
590 | set_temp_threshold(info, min, max); | |
591 | } else if (*data > TBAT_20D) { | |
592 | temp = 15; /* in range of (10, 20) */ | |
593 | min = TBAT_NEG_10D * GPBIAS2_GPADC1_UA / 1000; | |
594 | max = TBAT_40D * GPBIAS2_GPADC1_UA / 1000; | |
595 | set_temp_threshold(info, min, max); | |
596 | } else if (*data > TBAT_30D) { | |
597 | temp = 25; /* in range of (20, 30) */ | |
598 | min = TBAT_NEG_10D * GPBIAS2_GPADC1_UA / 1000; | |
599 | max = TBAT_40D * GPBIAS2_GPADC1_UA / 1000; | |
600 | set_temp_threshold(info, min, max); | |
601 | } else if (*data > TBAT_40D) { | |
602 | temp = 35; /* in range of (30, 40) */ | |
603 | min = TBAT_NEG_10D * GPBIAS2_GPADC1_UA / 1000; | |
604 | max = TBAT_40D * GPBIAS2_GPADC1_UA / 1000; | |
605 | set_temp_threshold(info, min, max); | |
606 | } else { | |
607 | min = TBAT_40D * GPBIAS2_GPADC1_UA / 1000; | |
608 | set_temp_threshold(info, min, 0); | |
609 | temp = 45; /* over heat ,suppose 45 roughly */ | |
610 | } | |
611 | ||
612 | dev_dbg(info->dev, "temp_C:%d C,temp_mv:%d mv\n", temp, *data); | |
613 | *data = temp; | |
614 | } | |
615 | return 0; | |
616 | } | |
617 | ||
618 | static int calc_resistor(struct pm860x_battery_info *info) | |
619 | { | |
620 | int vbatt_sum1; | |
621 | int vbatt_sum2; | |
622 | int chg_current; | |
623 | int ibatt_sum1; | |
624 | int ibatt_sum2; | |
625 | int data; | |
626 | int ret; | |
627 | int i; | |
628 | ||
629 | ret = measure_current(info, &data); | |
630 | /* make sure that charging is launched by data > 0 */ | |
631 | if (ret || data < 0) | |
632 | goto out; | |
633 | ||
634 | ret = measure_vbatt(info, OCV_MODE_ACTIVE, &data); | |
635 | if (ret) | |
636 | goto out; | |
637 | /* calculate resistor only in CC charge mode */ | |
638 | if (data < VBATT_RESISTOR_MIN || data > VBATT_RESISTOR_MAX) | |
639 | goto out; | |
640 | ||
641 | /* current is saved */ | |
642 | if (set_charger_current(info, 500, &chg_current)) | |
643 | goto out; | |
644 | ||
645 | /* | |
646 | * set charge current as 500mA, wait about 500ms till charging | |
647 | * process is launched and stable with the newer charging current. | |
648 | */ | |
649 | msleep(500); | |
650 | ||
651 | for (i = 0, vbatt_sum1 = 0, ibatt_sum1 = 0; i < 10; i++) { | |
652 | ret = measure_vbatt(info, OCV_MODE_ACTIVE, &data); | |
653 | if (ret) | |
654 | goto out_meas; | |
655 | vbatt_sum1 += data; | |
656 | ret = measure_current(info, &data); | |
657 | if (ret) | |
658 | goto out_meas; | |
659 | ||
660 | if (data < 0) | |
661 | ibatt_sum1 = ibatt_sum1 - data; /* discharging */ | |
662 | else | |
663 | ibatt_sum1 = ibatt_sum1 + data; /* charging */ | |
664 | } | |
665 | ||
666 | if (set_charger_current(info, 100, &ret)) | |
667 | goto out_meas; | |
668 | /* | |
669 | * set charge current as 100mA, wait about 500ms till charging | |
670 | * process is launched and stable with the newer charging current. | |
671 | */ | |
672 | msleep(500); | |
673 | ||
674 | for (i = 0, vbatt_sum2 = 0, ibatt_sum2 = 0; i < 10; i++) { | |
675 | ret = measure_vbatt(info, OCV_MODE_ACTIVE, &data); | |
676 | if (ret) | |
677 | goto out_meas; | |
678 | vbatt_sum2 += data; | |
679 | ret = measure_current(info, &data); | |
680 | if (ret) | |
681 | goto out_meas; | |
682 | ||
683 | if (data < 0) | |
684 | ibatt_sum2 = ibatt_sum2 - data; /* discharging */ | |
685 | else | |
686 | ibatt_sum2 = ibatt_sum2 + data; /* charging */ | |
687 | } | |
688 | ||
689 | /* restore current setting */ | |
690 | if (set_charger_current(info, chg_current, &ret)) | |
691 | goto out_meas; | |
692 | ||
693 | if ((vbatt_sum1 > vbatt_sum2) && (ibatt_sum1 > ibatt_sum2) && | |
694 | (ibatt_sum2 > 0)) { | |
695 | /* calculate resistor in discharging case */ | |
696 | data = 1000 * (vbatt_sum1 - vbatt_sum2) | |
697 | / (ibatt_sum1 - ibatt_sum2); | |
698 | if ((data - info->resistor > 0) && | |
699 | (data - info->resistor < info->resistor)) | |
700 | info->resistor = data; | |
701 | if ((info->resistor - data > 0) && | |
702 | (info->resistor - data < data)) | |
703 | info->resistor = data; | |
704 | } | |
705 | return 0; | |
706 | ||
707 | out_meas: | |
708 | set_charger_current(info, chg_current, &ret); | |
709 | out: | |
710 | return -EINVAL; | |
711 | } | |
712 | ||
713 | static int calc_capacity(struct pm860x_battery_info *info, int *cap) | |
714 | { | |
715 | int ret; | |
716 | int data; | |
717 | int ibat; | |
718 | int cap_ocv = 0; | |
719 | int cap_cc = 0; | |
720 | ||
721 | ret = calc_ccnt(info, &ccnt_data); | |
722 | if (ret) | |
723 | goto out; | |
724 | soc: | |
725 | data = info->max_capacity * info->start_soc / 100; | |
726 | if (ccnt_data.total_dischg - ccnt_data.total_chg <= data) { | |
727 | cap_cc = | |
728 | data + ccnt_data.total_chg - ccnt_data.total_dischg; | |
729 | } else { | |
730 | clear_ccnt(info, &ccnt_data); | |
731 | calc_soc(info, OCV_MODE_ACTIVE, &info->start_soc); | |
732 | dev_dbg(info->dev, "restart soc = %d !\n", | |
733 | info->start_soc); | |
734 | goto soc; | |
735 | } | |
736 | ||
737 | cap_cc = cap_cc * 100 / info->max_capacity; | |
738 | if (cap_cc < 0) | |
739 | cap_cc = 0; | |
740 | else if (cap_cc > 100) | |
741 | cap_cc = 100; | |
742 | ||
743 | dev_dbg(info->dev, "%s, last cap : %d", __func__, | |
744 | info->last_capacity); | |
745 | ||
746 | ret = measure_current(info, &ibat); | |
747 | if (ret) | |
748 | goto out; | |
749 | /* Calculate the capacity when discharging(ibat < 0) */ | |
750 | if (ibat < 0) { | |
751 | ret = calc_soc(info, OCV_MODE_ACTIVE, &cap_ocv); | |
752 | if (ret) | |
753 | cap_ocv = info->last_capacity; | |
754 | ret = measure_vbatt(info, OCV_MODE_ACTIVE, &data); | |
755 | if (ret) | |
756 | goto out; | |
757 | if (data <= LOW_BAT_THRESHOLD) { | |
758 | /* choose the lower capacity value to report | |
759 | * between vbat and CC when vbat < 3.6v; | |
760 | * than 3.6v; | |
761 | */ | |
762 | *cap = min(cap_ocv, cap_cc); | |
763 | } else { | |
764 | /* when detect vbat > 3.6v, but cap_cc < 15,and | |
765 | * cap_ocv is 10% larger than cap_cc, we can think | |
766 | * CC have some accumulation error, switch to OCV | |
767 | * to estimate capacity; | |
768 | * */ | |
769 | if (cap_cc < 15 && cap_ocv - cap_cc > 10) | |
770 | *cap = cap_ocv; | |
771 | else | |
772 | *cap = cap_cc; | |
773 | } | |
774 | /* when discharging, make sure current capacity | |
775 | * is lower than last*/ | |
776 | if (*cap > info->last_capacity) | |
777 | *cap = info->last_capacity; | |
778 | } else { | |
779 | *cap = cap_cc; | |
780 | } | |
781 | info->last_capacity = *cap; | |
782 | ||
783 | dev_dbg(info->dev, "%s, cap_ocv:%d cap_cc:%d, cap:%d\n", | |
784 | (ibat < 0) ? "discharging" : "charging", | |
785 | cap_ocv, cap_cc, *cap); | |
786 | /* | |
787 | * store the current capacity to RTC domain register, | |
788 | * after next power up , it will be restored. | |
789 | */ | |
790 | pm860x_set_bits(info->i2c, PM8607_RTC_MISC2, RTC_SOC_5LSB, | |
791 | (*cap & 0x1F) << 3); | |
792 | pm860x_set_bits(info->i2c, PM8607_RTC1, RTC_SOC_3MSB, | |
793 | ((*cap >> 5) & 0x3)); | |
794 | return 0; | |
795 | out: | |
796 | return ret; | |
797 | } | |
798 | ||
799 | static void pm860x_external_power_changed(struct power_supply *psy) | |
800 | { | |
297d716f | 801 | struct pm860x_battery_info *info = dev_get_drvdata(psy->dev.parent); |
a830d28b | 802 | |
a830d28b JZ |
803 | calc_resistor(info); |
804 | } | |
805 | ||
806 | static int pm860x_batt_get_prop(struct power_supply *psy, | |
807 | enum power_supply_property psp, | |
808 | union power_supply_propval *val) | |
809 | { | |
297d716f | 810 | struct pm860x_battery_info *info = dev_get_drvdata(psy->dev.parent); |
a830d28b JZ |
811 | int data; |
812 | int ret; | |
813 | ||
814 | switch (psp) { | |
815 | case POWER_SUPPLY_PROP_PRESENT: | |
816 | val->intval = info->present; | |
817 | break; | |
818 | case POWER_SUPPLY_PROP_CAPACITY: | |
819 | ret = calc_capacity(info, &data); | |
820 | if (ret) | |
821 | return ret; | |
822 | if (data < 0) | |
823 | data = 0; | |
824 | else if (data > 100) | |
825 | data = 100; | |
826 | /* return 100 if battery is not attached */ | |
827 | if (!info->present) | |
828 | data = 100; | |
829 | val->intval = data; | |
830 | break; | |
831 | case POWER_SUPPLY_PROP_TECHNOLOGY: | |
832 | val->intval = POWER_SUPPLY_TECHNOLOGY_LION; | |
833 | break; | |
834 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
835 | /* return real vbatt Voltage */ | |
836 | ret = measure_vbatt(info, OCV_MODE_ACTIVE, &data); | |
837 | if (ret) | |
838 | return ret; | |
839 | val->intval = data * 1000; | |
840 | break; | |
841 | case POWER_SUPPLY_PROP_VOLTAGE_AVG: | |
842 | /* return Open Circuit Voltage (not measured voltage) */ | |
843 | ret = calc_ocv(info, &data); | |
844 | if (ret) | |
845 | return ret; | |
846 | val->intval = data * 1000; | |
847 | break; | |
848 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
849 | ret = measure_current(info, &data); | |
850 | if (ret) | |
851 | return ret; | |
852 | val->intval = data; | |
853 | break; | |
854 | case POWER_SUPPLY_PROP_TEMP: | |
855 | if (info->present) { | |
856 | ret = measure_temp(info, &data); | |
857 | if (ret) | |
858 | return ret; | |
859 | data *= 10; | |
860 | } else { | |
861 | /* Fake Temp 25C Without Battery */ | |
862 | data = 250; | |
863 | } | |
864 | val->intval = data; | |
865 | break; | |
866 | default: | |
867 | return -ENODEV; | |
868 | } | |
869 | return 0; | |
870 | } | |
871 | ||
872 | static int pm860x_batt_set_prop(struct power_supply *psy, | |
873 | enum power_supply_property psp, | |
874 | const union power_supply_propval *val) | |
875 | { | |
297d716f | 876 | struct pm860x_battery_info *info = dev_get_drvdata(psy->dev.parent); |
a830d28b JZ |
877 | |
878 | switch (psp) { | |
879 | case POWER_SUPPLY_PROP_CHARGE_FULL: | |
880 | clear_ccnt(info, &ccnt_data); | |
881 | info->start_soc = 100; | |
882 | dev_dbg(info->dev, "chg done, update soc = %d\n", | |
883 | info->start_soc); | |
884 | break; | |
885 | default: | |
886 | return -EPERM; | |
887 | } | |
888 | ||
889 | return 0; | |
890 | } | |
891 | ||
892 | ||
893 | static enum power_supply_property pm860x_batt_props[] = { | |
894 | POWER_SUPPLY_PROP_PRESENT, | |
895 | POWER_SUPPLY_PROP_CAPACITY, | |
896 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
897 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
898 | POWER_SUPPLY_PROP_VOLTAGE_AVG, | |
899 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
900 | POWER_SUPPLY_PROP_TEMP, | |
901 | }; | |
902 | ||
297d716f KK |
903 | static const struct power_supply_desc pm860x_battery_desc = { |
904 | .name = "battery-monitor", | |
905 | .type = POWER_SUPPLY_TYPE_BATTERY, | |
906 | .properties = pm860x_batt_props, | |
907 | .num_properties = ARRAY_SIZE(pm860x_batt_props), | |
908 | .get_property = pm860x_batt_get_prop, | |
909 | .set_property = pm860x_batt_set_prop, | |
910 | .external_power_changed = pm860x_external_power_changed, | |
911 | }; | |
912 | ||
c8afa640 | 913 | static int pm860x_battery_probe(struct platform_device *pdev) |
a830d28b JZ |
914 | { |
915 | struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent); | |
916 | struct pm860x_battery_info *info; | |
917 | struct pm860x_power_pdata *pdata; | |
918 | int ret; | |
919 | ||
920 | info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); | |
921 | if (!info) | |
922 | return -ENOMEM; | |
923 | ||
924 | info->irq_cc = platform_get_irq(pdev, 0); | |
925 | if (info->irq_cc <= 0) { | |
926 | dev_err(&pdev->dev, "No IRQ resource!\n"); | |
08536992 | 927 | return -EINVAL; |
a830d28b JZ |
928 | } |
929 | ||
930 | info->irq_batt = platform_get_irq(pdev, 1); | |
931 | if (info->irq_batt <= 0) { | |
932 | dev_err(&pdev->dev, "No IRQ resource!\n"); | |
08536992 | 933 | return -EINVAL; |
a830d28b JZ |
934 | } |
935 | ||
936 | info->chip = chip; | |
937 | info->i2c = | |
938 | (chip->id == CHIP_PM8607) ? chip->client : chip->companion; | |
939 | info->dev = &pdev->dev; | |
940 | info->status = POWER_SUPPLY_STATUS_UNKNOWN; | |
941 | pdata = pdev->dev.platform_data; | |
942 | ||
943 | mutex_init(&info->lock); | |
944 | platform_set_drvdata(pdev, info); | |
945 | ||
946 | pm860x_init_battery(info); | |
947 | ||
a830d28b JZ |
948 | if (pdata && pdata->max_capacity) |
949 | info->max_capacity = pdata->max_capacity; | |
950 | else | |
951 | info->max_capacity = 1500; /* set default capacity */ | |
952 | if (pdata && pdata->resistor) | |
953 | info->resistor = pdata->resistor; | |
954 | else | |
955 | info->resistor = 300; /* set default internal resistor */ | |
956 | ||
2a9123f1 VT |
957 | info->battery = devm_power_supply_register(&pdev->dev, |
958 | &pm860x_battery_desc, | |
959 | NULL); | |
297d716f KK |
960 | if (IS_ERR(info->battery)) |
961 | return PTR_ERR(info->battery); | |
962 | info->battery->dev.parent = &pdev->dev; | |
a830d28b | 963 | |
2a9123f1 VT |
964 | ret = devm_request_threaded_irq(chip->dev, info->irq_cc, NULL, |
965 | pm860x_coulomb_handler, IRQF_ONESHOT, | |
966 | "coulomb", info); | |
a830d28b JZ |
967 | if (ret < 0) { |
968 | dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n", | |
969 | info->irq_cc, ret); | |
2a9123f1 | 970 | return ret; |
a830d28b JZ |
971 | } |
972 | ||
2a9123f1 VT |
973 | ret = devm_request_threaded_irq(chip->dev, info->irq_batt, NULL, |
974 | pm860x_batt_handler, | |
975 | IRQF_ONESHOT, "battery", info); | |
a830d28b JZ |
976 | if (ret < 0) { |
977 | dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n", | |
978 | info->irq_batt, ret); | |
2a9123f1 | 979 | return ret; |
a830d28b JZ |
980 | } |
981 | ||
982 | ||
a830d28b JZ |
983 | return 0; |
984 | } | |
985 | ||
986 | #ifdef CONFIG_PM_SLEEP | |
987 | static int pm860x_battery_suspend(struct device *dev) | |
988 | { | |
989 | struct platform_device *pdev = to_platform_device(dev); | |
990 | struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent); | |
991 | ||
992 | if (device_may_wakeup(dev)) | |
993 | chip->wakeup_flag |= 1 << PM8607_IRQ_CC; | |
994 | return 0; | |
995 | } | |
996 | ||
997 | static int pm860x_battery_resume(struct device *dev) | |
998 | { | |
999 | struct platform_device *pdev = to_platform_device(dev); | |
1000 | struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent); | |
1001 | ||
1002 | if (device_may_wakeup(dev)) | |
1003 | chip->wakeup_flag &= ~(1 << PM8607_IRQ_CC); | |
1004 | return 0; | |
1005 | } | |
1006 | #endif | |
1007 | ||
1008 | static SIMPLE_DEV_PM_OPS(pm860x_battery_pm_ops, | |
1009 | pm860x_battery_suspend, pm860x_battery_resume); | |
1010 | ||
1011 | static struct platform_driver pm860x_battery_driver = { | |
1012 | .driver = { | |
1013 | .name = "88pm860x-battery", | |
a830d28b JZ |
1014 | .pm = &pm860x_battery_pm_ops, |
1015 | }, | |
1016 | .probe = pm860x_battery_probe, | |
a830d28b JZ |
1017 | }; |
1018 | module_platform_driver(pm860x_battery_driver); | |
1019 | ||
1020 | MODULE_DESCRIPTION("Marvell 88PM860x Battery driver"); | |
1021 | MODULE_LICENSE("GPL"); |