1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2010
4 * Texas Instruments, <www.ti.com>
5 */
6 #include <config.h>
7
8 #include <twl6030.h>
9
10 static struct twl6030_data *twl;
11
12 static struct twl6030_data twl6030_info = {
13 .chip_type = chip_TWL6030,
14 .adc_rbase = GPCH0_LSB,
15 .adc_ctrl = CTRL_P2,
16 .adc_enable = CTRL_P2_SP2,
17 .vbat_mult = TWL6030_VBAT_MULT,
18 .vbat_shift = TWL6030_VBAT_SHIFT,
19 };
20
21 static struct twl6030_data twl6032_info = {
22 .chip_type = chip_TWL6032,
23 .adc_rbase = TWL6032_GPCH0_LSB,
24 .adc_ctrl = TWL6032_CTRL_P1,
25 .adc_enable = CTRL_P1_SP1,
26 .vbat_mult = TWL6032_VBAT_MULT,
27 .vbat_shift = TWL6032_VBAT_SHIFT,
28 };
29
30
twl6030_gpadc_read_channel(u8 channel_no)31 static int twl6030_gpadc_read_channel(u8 channel_no)
32 {
33 u8 lsb = 0;
34 u8 msb = 0;
35 int ret = 0;
36
37 ret = twl6030_i2c_read_u8(TWL6030_CHIP_ADC,
38 twl->adc_rbase + channel_no * 2, &lsb);
39 if (ret)
40 return ret;
41
42 ret = twl6030_i2c_read_u8(TWL6030_CHIP_ADC,
43 twl->adc_rbase + 1 + channel_no * 2, &msb);
44 if (ret)
45 return ret;
46
47 return (msb << 8) | lsb;
48 }
49
twl6030_gpadc_sw2_trigger(void)50 static int twl6030_gpadc_sw2_trigger(void)
51 {
52 u8 val;
53 int ret = 0;
54
55 ret = twl6030_i2c_write_u8(TWL6030_CHIP_ADC,
56 twl->adc_ctrl, twl->adc_enable);
57 if (ret)
58 return ret;
59
60 /* Waiting until the SW1 conversion ends*/
61 val = CTRL_P2_BUSY;
62
63 while (!((val & CTRL_P2_EOCP2) && (!(val & CTRL_P2_BUSY)))) {
64 ret = twl6030_i2c_read_u8(TWL6030_CHIP_ADC,
65 twl->adc_ctrl, &val);
66 if (ret)
67 return ret;
68 udelay(1000);
69 }
70
71 return 0;
72 }
73
twl6030_power_off(void)74 void twl6030_power_off(void)
75 {
76 twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_PHOENIX_DEV_ON,
77 TWL6030_PHOENIX_APP_DEVOFF | TWL6030_PHOENIX_CON_DEVOFF |
78 TWL6030_PHOENIX_MOD_DEVOFF);
79 }
80
twl6030_stop_usb_charging(void)81 void twl6030_stop_usb_charging(void)
82 {
83 twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CONTROLLER_CTRL1, 0);
84
85 return;
86 }
87
twl6030_start_usb_charging(void)88 void twl6030_start_usb_charging(void)
89 {
90 twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
91 CHARGERUSB_VICHRG, CHARGERUSB_VICHRG_1500);
92 twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
93 CHARGERUSB_CINLIMIT, CHARGERUSB_CIN_LIMIT_NONE);
94 twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
95 CONTROLLER_INT_MASK, MBAT_TEMP);
96 twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
97 CHARGERUSB_INT_MASK, MASK_MCHARGERUSB_THMREG);
98 twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
99 CHARGERUSB_VOREG, CHARGERUSB_VOREG_4P0);
100 twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
101 CHARGERUSB_CTRL2, CHARGERUSB_CTRL2_VITERM_400);
102 twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CHARGERUSB_CTRL1, TERM);
103 /* Enable USB charging */
104 twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER,
105 CONTROLLER_CTRL1, CONTROLLER_CTRL1_EN_CHARGER);
106 return;
107 }
108
twl6030_get_battery_current(void)109 int twl6030_get_battery_current(void)
110 {
111 int battery_current = 0;
112 u8 msb = 0;
113 u8 lsb = 0;
114
115 twl6030_i2c_read_u8(TWL6030_CHIP_CHARGER, FG_REG_11, &msb);
116 twl6030_i2c_read_u8(TWL6030_CHIP_CHARGER, FG_REG_10, &lsb);
117 battery_current = ((msb << 8) | lsb);
118
119 /* convert 10 bit signed number to 16 bit signed number */
120 if (battery_current >= 0x2000)
121 battery_current = (battery_current - 0x4000);
122
123 battery_current = battery_current * 3000 / 4096;
124 printf("Battery Current: %d mA\n", battery_current);
125
126 return battery_current;
127 }
128
twl6030_get_battery_voltage(void)129 int twl6030_get_battery_voltage(void)
130 {
131 int battery_volt = 0;
132 int ret = 0;
133 u8 vbatch;
134
135 if (twl->chip_type == chip_TWL6030) {
136 vbatch = TWL6030_GPADC_VBAT_CHNL;
137 } else {
138 ret = twl6030_i2c_write_u8(TWL6030_CHIP_ADC,
139 TWL6032_GPSELECT_ISB,
140 TWL6032_GPADC_VBAT_CHNL);
141 if (ret)
142 return ret;
143 vbatch = 0;
144 }
145
146 /* Start GPADC SW conversion */
147 ret = twl6030_gpadc_sw2_trigger();
148 if (ret) {
149 printf("Failed to convert battery voltage\n");
150 return ret;
151 }
152
153 /* measure Vbat voltage */
154 battery_volt = twl6030_gpadc_read_channel(vbatch);
155 if (battery_volt < 0) {
156 printf("Failed to read battery voltage\n");
157 return ret;
158 }
159 battery_volt = (battery_volt * twl->vbat_mult) >> twl->vbat_shift;
160 printf("Battery Voltage: %d mV\n", battery_volt);
161
162 return battery_volt;
163 }
164
twl6030_init_battery_charging(void)165 void twl6030_init_battery_charging(void)
166 {
167 u8 val = 0;
168 int battery_volt = 0;
169 int ret = 0;
170
171 ret = twl6030_i2c_read_u8(TWL6030_CHIP_USB, USB_PRODUCT_ID_LSB, &val);
172 if (ret) {
173 puts("twl6030_init_battery_charging(): could not determine chip!\n");
174 return;
175 }
176 if (val == 0x30) {
177 twl = &twl6030_info;
178 } else if (val == 0x32) {
179 twl = &twl6032_info;
180 } else {
181 puts("twl6030_init_battery_charging(): unsupported chip type\n");
182 return;
183 }
184
185 /* Enable VBAT measurement */
186 if (twl->chip_type == chip_TWL6030) {
187 twl6030_i2c_write_u8(TWL6030_CHIP_PM, MISC1, VBAT_MEAS);
188 twl6030_i2c_write_u8(TWL6030_CHIP_ADC,
189 TWL6030_GPADC_CTRL,
190 GPADC_CTRL_SCALER_DIV4);
191 } else {
192 twl6030_i2c_write_u8(TWL6030_CHIP_ADC,
193 TWL6032_GPADC_CTRL2,
194 GPADC_CTRL2_CH18_SCALER_EN);
195 }
196
197 /* Enable GPADC module */
198 ret = twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, TOGGLE1, FGS | GPADCS);
199 if (ret) {
200 printf("Failed to enable GPADC\n");
201 return;
202 }
203
204 battery_volt = twl6030_get_battery_voltage();
205 if (battery_volt < 0)
206 return;
207
208 if (battery_volt < 3000)
209 printf("Main battery voltage too low!\n");
210
211 /* Check for the presence of USB charger */
212 twl6030_i2c_read_u8(TWL6030_CHIP_CHARGER, CONTROLLER_STAT1, &val);
213
214 /* check for battery presence indirectly via Fuel gauge */
215 if ((val & VBUS_DET) && (battery_volt < 3300))
216 twl6030_start_usb_charging();
217
218 return;
219 }
220
twl6030_power_mmc_init(int dev_index)221 void twl6030_power_mmc_init(int dev_index)
222 {
223 u8 value = 0;
224
225 if (dev_index == 0) {
226 /* 3.0V voltage output for VMMC */
227 twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VMMC_CFG_VOLTAGE,
228 TWL6030_CFG_VOLTAGE_30);
229
230 /* Enable P1 output for VMMC */
231 twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VMMC_CFG_STATE,
232 TWL6030_CFG_STATE_P1 | TWL6030_CFG_STATE_ON);
233 } else if (dev_index == 1) {
234 twl6030_i2c_read_u8(TWL6030_CHIP_PM, TWL6030_PH_STS_BOOT,
235 &value);
236 /* BOOT2 indicates 1.8V/2.8V VAUX1 for eMMC */
237 if (value & TWL6030_PH_STS_BOOT2) {
238 /* 1.8V voltage output for VAUX1 */
239 twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VAUX1_CFG_VOLTAGE,
240 TWL6030_CFG_VOLTAGE_18);
241 } else {
242 /* 2.8V voltage output for VAUX1 */
243 twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VAUX1_CFG_VOLTAGE,
244 TWL6030_CFG_VOLTAGE_28);
245 }
246
247 /* Enable P1 output for VAUX */
248 twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VAUX1_CFG_STATE,
249 TWL6030_CFG_STATE_P1 | TWL6030_CFG_STATE_ON);
250 }
251 }
252
twl6030_usb_device_settings()253 void twl6030_usb_device_settings()
254 {
255 u8 value = 0;
256
257 /* 3.3V voltage output for VUSB */
258 twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VUSB_CFG_VOLTAGE,
259 TWL6030_CFG_VOLTAGE_33);
260
261 /* Enable P1 output for VUSB */
262 twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VUSB_CFG_STATE,
263 TWL6030_CFG_STATE_P1 | TWL6030_CFG_STATE_ON);
264
265 /* Select the input supply for VUSB regulator */
266 twl6030_i2c_read_u8(TWL6030_CHIP_PM, TWL6030_MISC2, &value);
267 value |= TWL6030_MISC2_VUSB_IN_VSYS;
268 value &= ~TWL6030_MISC2_VUSB_IN_PMID;
269 twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_MISC2, value);
270 }
271
272 #ifdef CONFIG_DM_I2C
twl6030_i2c_write_u8(u8 chip_no,u8 reg,u8 val)273 int twl6030_i2c_write_u8(u8 chip_no, u8 reg, u8 val)
274 {
275 struct udevice *dev;
276 int ret;
277
278 ret = i2c_get_chip_for_busnum(0, chip_no, 1, &dev);
279 if (ret) {
280 pr_err("unable to get I2C bus. ret %d\n", ret);
281 return ret;
282 }
283 ret = dm_i2c_reg_write(dev, reg, val);
284 if (ret) {
285 pr_err("writing to twl6030 failed. ret %d\n", ret);
286 return ret;
287 }
288 return 0;
289 }
290
twl6030_i2c_read_u8(u8 chip_no,u8 reg,u8 * valp)291 int twl6030_i2c_read_u8(u8 chip_no, u8 reg, u8 *valp)
292 {
293 struct udevice *dev;
294 int ret;
295
296 ret = i2c_get_chip_for_busnum(0, chip_no, 1, &dev);
297 if (ret) {
298 pr_err("unable to get I2C bus. ret %d\n", ret);
299 return ret;
300 }
301 ret = dm_i2c_reg_read(dev, reg);
302 if (ret < 0) {
303 pr_err("reading from twl6030 failed. ret %d\n", ret);
304 return ret;
305 }
306 *valp = (u8)ret;
307 return 0;
308 }
309 #endif
310