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8#include <common.h>
9#include <power/pmic.h>
10#include <power/max77693_fg.h>
11#include <i2c.h>
12#include <power/power_chrg.h>
13#include <power/battery.h>
14#include <power/fg_battery_cell_params.h>
15#include <errno.h>
16
17static int max77693_get_vcell(u32 *vcell)
18{
19 u16 value;
20 u8 ret;
21
22 ret = i2c_read(MAX77693_FUEL_I2C_ADDR, MAX77693_VCELL, 1,
23 (u8 *)&value, 2);
24 if (ret)
25 return ret;
26
27 *vcell = (u32)(value >> 3);
28 *vcell = *vcell * 625;
29
30 return 0;
31}
32
33static int max77693_get_soc(u32 *soc)
34{
35 u16 value;
36 u8 ret;
37
38 ret = i2c_read(MAX77693_FUEL_I2C_ADDR, MAX77693_VFSOC, 1,
39 (u8 *)&value, 2);
40 if (ret)
41 return ret;
42
43 *soc = (u32)(value >> 8);
44
45 return 0;
46}
47
48static int power_update_battery(struct pmic *p, struct pmic *bat)
49{
50 struct power_battery *pb = bat->pbat;
51 int ret;
52
53 if (pmic_probe(p)) {
54 puts("Can't find max77693 fuel gauge\n");
55 return -1;
56 }
57
58 ret = max77693_get_soc(&pb->bat->state_of_chrg);
59 if (ret)
60 return ret;
61
62 max77693_get_vcell(&pb->bat->voltage_uV);
63 if (ret)
64 return ret;
65
66 return 0;
67}
68
69static int power_check_battery(struct pmic *p, struct pmic *bat)
70{
71 struct power_battery *pb = bat->pbat;
72 unsigned int val;
73 int ret = 0;
74
75 if (pmic_probe(p)) {
76 puts("Can't find max77693 fuel gauge\n");
77 return -1;
78 }
79
80 ret = pmic_reg_read(p, MAX77693_STATUS, &val);
81 if (ret)
82 return ret;
83 debug("fg status: 0x%x\n", val);
84
85 ret = pmic_reg_read(p, MAX77693_VERSION, &pb->bat->version);
86 if (ret)
87 return ret;
88
89 ret = power_update_battery(p, bat);
90 if (ret)
91 return ret;
92 debug("fg ver: 0x%x\n", pb->bat->version);
93 printf("BAT: state_of_charge(SOC):%d%%\n",
94 pb->bat->state_of_chrg);
95
96 printf(" voltage: %d.%6.6d [V] (expected to be %d [mAh])\n",
97 pb->bat->voltage_uV / 1000000,
98 pb->bat->voltage_uV % 1000000,
99 pb->bat->capacity);
100
101 if (pb->bat->voltage_uV > 3850000)
102 pb->bat->state = EXT_SOURCE;
103 else if (pb->bat->voltage_uV < 3600000 || pb->bat->state_of_chrg < 5)
104 pb->bat->state = CHARGE;
105 else
106 pb->bat->state = NORMAL;
107
108 return 0;
109}
110
111static struct power_fg power_fg_ops = {
112 .fg_battery_check = power_check_battery,
113 .fg_battery_update = power_update_battery,
114};
115
116int power_fg_init(unsigned char bus)
117{
118 static const char name[] = "MAX77693_FG";
119 struct pmic *p = pmic_alloc();
120
121 if (!p) {
122 printf("%s: POWER allocation error!\n", __func__);
123 return -ENOMEM;
124 }
125
126 debug("Board Fuel Gauge init\n");
127
128 p->name = name;
129 p->interface = PMIC_I2C;
130 p->number_of_regs = FG_NUM_OF_REGS;
131 p->hw.i2c.addr = MAX77693_FUEL_I2C_ADDR;
132 p->hw.i2c.tx_num = 2;
133 p->sensor_byte_order = PMIC_SENSOR_BYTE_ORDER_BIG;
134 p->bus = bus;
135
136 p->fg = &power_fg_ops;
137
138 return 0;
139}
140
