1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
|
// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2010
* Texas Instruments, <www.ti.com>
*/
#include <config.h>
#include <twl6030.h>
static struct twl6030_data *twl;
static struct twl6030_data twl6030_info = {
.chip_type = chip_TWL6030,
.adc_rbase = GPCH0_LSB,
.adc_ctrl = CTRL_P2,
.adc_enable = CTRL_P2_SP2,
.vbat_mult = TWL6030_VBAT_MULT,
.vbat_shift = TWL6030_VBAT_SHIFT,
};
static struct twl6030_data twl6032_info = {
.chip_type = chip_TWL6032,
.adc_rbase = TWL6032_GPCH0_LSB,
.adc_ctrl = TWL6032_CTRL_P1,
.adc_enable = CTRL_P1_SP1,
.vbat_mult = TWL6032_VBAT_MULT,
.vbat_shift = TWL6032_VBAT_SHIFT,
};
static int twl6030_gpadc_read_channel(u8 channel_no)
{
u8 lsb = 0;
u8 msb = 0;
int ret = 0;
ret = twl6030_i2c_read_u8(TWL6030_CHIP_ADC,
twl->adc_rbase + channel_no * 2, &lsb);
if (ret)
return ret;
ret = twl6030_i2c_read_u8(TWL6030_CHIP_ADC,
twl->adc_rbase + 1 + channel_no * 2, &msb);
if (ret)
return ret;
return (msb << 8) | lsb;
}
static int twl6030_gpadc_sw2_trigger(void)
{
u8 val;
int ret = 0;
ret = twl6030_i2c_write_u8(TWL6030_CHIP_ADC,
twl->adc_ctrl, twl->adc_enable);
if (ret)
return ret;
/* Waiting until the SW1 conversion ends*/
val = CTRL_P2_BUSY;
while (!((val & CTRL_P2_EOCP2) && (!(val & CTRL_P2_BUSY)))) {
ret = twl6030_i2c_read_u8(TWL6030_CHIP_ADC,
twl->adc_ctrl, &val);
if (ret)
return ret;
udelay(1000);
}
return 0;
}
void twl6030_power_off(void)
{
twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_PHOENIX_DEV_ON,
TWL6030_PHOENIX_APP_DEVOFF | TWL6030_PHOENIX_CON_DEVOFF |
TWL6030_PHOENIX_MOD_DEVOFF);
}
void twl6030_stop_usb_charging(void)
{
twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CONTROLLER_CTRL1, 0);
return;
}
void twl6030_start_usb_charging(void)
{
twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
CHARGERUSB_VICHRG, CHARGERUSB_VICHRG_1500);
twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
CHARGERUSB_CINLIMIT, CHARGERUSB_CIN_LIMIT_NONE);
twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
CONTROLLER_INT_MASK, MBAT_TEMP);
twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
CHARGERUSB_INT_MASK, MASK_MCHARGERUSB_THMREG);
twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
CHARGERUSB_VOREG, CHARGERUSB_VOREG_4P0);
twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
CHARGERUSB_CTRL2, CHARGERUSB_CTRL2_VITERM_400);
twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CHARGERUSB_CTRL1, TERM);
/* Enable USB charging */
twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
CONTROLLER_CTRL1, CONTROLLER_CTRL1_EN_CHARGER);
return;
}
int twl6030_get_battery_current(void)
{
int battery_current = 0;
u8 msb = 0;
u8 lsb = 0;
twl6030_i2c_read_u8(TWL6030_CHIP_CHARGER, FG_REG_11, &msb);
twl6030_i2c_read_u8(TWL6030_CHIP_CHARGER, FG_REG_10, &lsb);
battery_current = ((msb << 8) | lsb);
/* convert 10 bit signed number to 16 bit signed number */
if (battery_current >= 0x2000)
battery_current = (battery_current - 0x4000);
battery_current = battery_current * 3000 / 4096;
printf("Battery Current: %d mA\n", battery_current);
return battery_current;
}
int twl6030_get_battery_voltage(void)
{
int battery_volt = 0;
int ret = 0;
u8 vbatch;
if (twl->chip_type == chip_TWL6030) {
vbatch = TWL6030_GPADC_VBAT_CHNL;
} else {
ret = twl6030_i2c_write_u8(TWL6030_CHIP_ADC,
TWL6032_GPSELECT_ISB,
TWL6032_GPADC_VBAT_CHNL);
if (ret)
return ret;
vbatch = 0;
}
/* Start GPADC SW conversion */
ret = twl6030_gpadc_sw2_trigger();
if (ret) {
printf("Failed to convert battery voltage\n");
return ret;
}
/* measure Vbat voltage */
battery_volt = twl6030_gpadc_read_channel(vbatch);
if (battery_volt < 0) {
printf("Failed to read battery voltage\n");
return ret;
}
battery_volt = (battery_volt * twl->vbat_mult) >> twl->vbat_shift;
printf("Battery Voltage: %d mV\n", battery_volt);
return battery_volt;
}
void twl6030_init_battery_charging(void)
{
u8 val = 0;
int battery_volt = 0;
int ret = 0;
ret = twl6030_i2c_read_u8(TWL6030_CHIP_USB, USB_PRODUCT_ID_LSB, &val);
if (ret) {
puts("twl6030_init_battery_charging(): could not determine chip!\n");
return;
}
if (val == 0x30) {
twl = &twl6030_info;
} else if (val == 0x32) {
twl = &twl6032_info;
} else {
puts("twl6030_init_battery_charging(): unsupported chip type\n");
return;
}
/* Enable VBAT measurement */
if (twl->chip_type == chip_TWL6030) {
twl6030_i2c_write_u8(TWL6030_CHIP_PM, MISC1, VBAT_MEAS);
twl6030_i2c_write_u8(TWL6030_CHIP_ADC,
TWL6030_GPADC_CTRL,
GPADC_CTRL_SCALER_DIV4);
} else {
twl6030_i2c_write_u8(TWL6030_CHIP_ADC,
TWL6032_GPADC_CTRL2,
GPADC_CTRL2_CH18_SCALER_EN);
}
/* Enable GPADC module */
ret = twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, TOGGLE1, FGS | GPADCS);
if (ret) {
printf("Failed to enable GPADC\n");
return;
}
battery_volt = twl6030_get_battery_voltage();
if (battery_volt < 0)
return;
if (battery_volt < 3000)
printf("Main battery voltage too low!\n");
/* Check for the presence of USB charger */
twl6030_i2c_read_u8(TWL6030_CHIP_CHARGER, CONTROLLER_STAT1, &val);
/* check for battery presence indirectly via Fuel gauge */
if ((val & VBUS_DET) && (battery_volt < 3300))
twl6030_start_usb_charging();
return;
}
void twl6030_power_mmc_init(int dev_index)
{
u8 value = 0;
if (dev_index == 0) {
/* 3.0V voltage output for VMMC */
twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VMMC_CFG_VOLTAGE,
TWL6030_CFG_VOLTAGE_30);
/* Enable P1 output for VMMC */
twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VMMC_CFG_STATE,
TWL6030_CFG_STATE_P1 | TWL6030_CFG_STATE_ON);
} else if (dev_index == 1) {
twl6030_i2c_read_u8(TWL6030_CHIP_PM, TWL6030_PH_STS_BOOT,
&value);
/* BOOT2 indicates 1.8V/2.8V VAUX1 for eMMC */
if (value & TWL6030_PH_STS_BOOT2) {
/* 1.8V voltage output for VAUX1 */
twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VAUX1_CFG_VOLTAGE,
TWL6030_CFG_VOLTAGE_18);
} else {
/* 2.8V voltage output for VAUX1 */
twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VAUX1_CFG_VOLTAGE,
TWL6030_CFG_VOLTAGE_28);
}
/* Enable P1 output for VAUX */
twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VAUX1_CFG_STATE,
TWL6030_CFG_STATE_P1 | TWL6030_CFG_STATE_ON);
}
}
void twl6030_usb_device_settings()
{
u8 value = 0;
/* 3.3V voltage output for VUSB */
twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VUSB_CFG_VOLTAGE,
TWL6030_CFG_VOLTAGE_33);
/* Enable P1 output for VUSB */
twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VUSB_CFG_STATE,
TWL6030_CFG_STATE_P1 | TWL6030_CFG_STATE_ON);
/* Select the input supply for VUSB regulator */
twl6030_i2c_read_u8(TWL6030_CHIP_PM, TWL6030_MISC2, &value);
value |= TWL6030_MISC2_VUSB_IN_VSYS;
value &= ~TWL6030_MISC2_VUSB_IN_PMID;
twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_MISC2, value);
}
#ifdef CONFIG_DM_I2C
int twl6030_i2c_write_u8(u8 chip_no, u8 reg, u8 val)
{
struct udevice *dev;
int ret;
ret = i2c_get_chip_for_busnum(0, chip_no, 1, &dev);
if (ret) {
pr_err("unable to get I2C bus. ret %d\n", ret);
return ret;
}
ret = dm_i2c_reg_write(dev, reg, val);
if (ret) {
pr_err("writing to twl6030 failed. ret %d\n", ret);
return ret;
}
return 0;
}
int twl6030_i2c_read_u8(u8 chip_no, u8 reg, u8 *valp)
{
struct udevice *dev;
int ret;
ret = i2c_get_chip_for_busnum(0, chip_no, 1, &dev);
if (ret) {
pr_err("unable to get I2C bus. ret %d\n", ret);
return ret;
}
ret = dm_i2c_reg_read(dev, reg);
if (ret < 0) {
pr_err("reading from twl6030 failed. ret %d\n", ret);
return ret;
}
*valp = (u8)ret;
return 0;
}
#endif
|
