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#include <common.h>
#include <command.h>
#include <linux/ctype.h>
#include <asm/errno.h>
#include "../../../include/i2c.h"
#include "../../wmt_battery.h"
#include "sp2541_battery.h"
static int i2c_bus = I2C_BUS_ID;
static int sp2541_read(u8 cmd, u8 reg, u8 *rt_value, unsigned int len)
{
struct i2c_msg_s msg[2];
unsigned char data[2] = {cmd, reg};
msg[0].addr = SP2541_I2C_ADDR;
msg[0].flags = 0;
msg[0].len = 2;
msg[0].buf = data;
msg[1].addr = SP2541_I2C_ADDR;
msg[1].flags = I2C_M_RD;
msg[1].len = len;
msg[1].buf = rt_value;
return wmt_i2c_transfer(msg, 2, i2c_bus);
}
static int sp2541_write(u8 cmd, u8 reg, u8 const buf)
{
struct i2c_msg_s msg;
char data[3] = {cmd, reg, buf};
msg.addr = SP2541_I2C_ADDR;
msg.flags = 0;
msg.len = 3;
msg.buf = data;
return wmt_i2c_transfer(&msg, 1, i2c_bus);
}
static int EEPROM_read_byte(int addr, u8 *data)
{
u8 addr_hi, addr_lo, i;
u8 tmp = -1;
addr_hi = (addr >> 8) & 0xFF;
addr_lo = addr & 0xFF;
if (sp2541_write(EEPROM_WRITE_CMD, 0x00, addr_lo) < 0)
return -1;
if (sp2541_write(EEPROM_WRITE_CMD, 0x01, addr_hi) < 0)
return -1;
if (sp2541_write(EEPROM_WRITE_CMD, 0x03, 0x06) < 0)
return -1;
for (i=0; i<10; i++) {
sp2541_read(EEPROM_READ_CMD, 0x03, &tmp, 1);
if (tmp == 0)
break;
}
if (i == 10)
return -1;
if (sp2541_read(EEPROM_READ_CMD, 0x02, data, 1) < 0)
return -1;
return 0;
}
static int EEPROM_write_byte(int addr, u8 data)
{
u8 addr_hi, addr_lo, i;
u8 tmp = -1;
addr_hi = (addr >> 8) & 0xFF;
addr_lo = addr & 0xFF;
if (sp2541_write(EEPROM_WRITE_CMD, 0x00, addr_lo) < 0)
return -1;
if (sp2541_write(EEPROM_WRITE_CMD, 0x01, addr_hi) < 0)
return -1;
if (sp2541_write(EEPROM_WRITE_CMD, 0x02, data) < 0)
return -1;
if (sp2541_write(EEPROM_WRITE_CMD, 0x03, 0x05) < 0)
return -1;
for (i=0; i<10; i++) {
sp2541_read(EEPROM_READ_CMD, 0x03, &tmp, 1);
if (tmp == 0)
break;
}
if (i == 10)
return -1;
return 0;
}
static int sp2541_init(void)
{
char *env, *p;
char *endp;
p = env = getenv("wmt.battery.param");
if (!p)
return -EINVAL;
if (prefixcmp(p, "sp2541"))
return -EINVAL;
p = strchr(env, ':');
p++;
i2c_bus = simple_strtol(p, &endp, 10);
if (*endp != ':')
return -EINVAL;
return 0;
}
static int sp2541_get_capacity(void)
{
unsigned char buf[2];
int ret;
ret = sp2541_read(RAM_READ_CMD, SP2541_REG_SOC, buf, 2);
if (ret<0) {
printf("error reading capacity\n");
return ret;
}
ret = buf[0] | buf[1] << 8;
printf("Current capacity: %d\%\n", ret);
return ret;
}
static int sp2541_get_voltage(void)
{
unsigned char buf[2];
int ret;
ret = sp2541_read(RAM_READ_CMD, SP2541_REG_VOLT, buf, 2);
if (ret<0) {
printf("error reading capacity\n");
return ret;
}
return buf[0] | buf[1] << 8;
}
static int sp2541_get_current(void)
{
unsigned char buf[2];
int ret;
ret = sp2541_read(RAM_READ_CMD, SP2541_REG_AI, buf, 2);
if (ret<0) {
printf("error reading capacity\n");
return ret;
}
return buf[0] | buf[1] << 8;
}
static int sp2541_check_bl(void)
{
int capacity;
capacity = sp2541_get_capacity();
if (capacity < 0)
return -1;
return (capacity < 3);
}
struct battery_dev sp2541_battery_dev = {
.name = "sp2541",
.is_gauge = 1,
.init = sp2541_init,
.get_capacity = sp2541_get_capacity,
.get_voltage = sp2541_get_voltage,
.get_current = sp2541_get_current,
.check_batlow = sp2541_check_bl,
};
static int do_sp2541(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
int i, j;
int capacity,voltage,current;
u8 data_buf;
int eeprom_data;
int ret;
if (sp2541_init())
return 0;
capacity = sp2541_get_capacity();
voltage = sp2541_get_voltage();
current = sp2541_get_current();
printf("capacity = %d\n", capacity);
printf("voltage = %d\n", voltage);
printf("current = %d\n", current);
/*for (i = 0; i < ARRAY_SIZE(default_table); i++) {
printf("{0x%x, %d, %x}\n", default_table[i].addr, default_table[i].len, default_table[i].data);
for (j = 0; j < default_table[i].len; j++) {
data_buf = (default_table[i].data >> (8*(default_table[i].len-j-1))) & 0xFF;
ret = EEPROM_write_byte(default_table[i].addr + j, data_buf);
if (ret<0) {
printf("error write eeprom.\n");
return 0;
}
}
}*/
for (i = 0; i < ARRAY_SIZE(default_table); i++) {
eeprom_data = 0;
for (j = 0; j < default_table[i].len; j++) {
ret = EEPROM_read_byte(default_table[i].addr + j, &data_buf);
if (ret<0) {
printf("error read eeprom.\n");
return 0;
}
eeprom_data = (eeprom_data << 8*j) | data_buf;
}
//printf("{0x%x, %d, %x}\n", default_table[i].addr, default_table[i].len, default_table[i].data);
printf("0x%x: %x\n", default_table[i].addr, eeprom_data);
}
return 0;
}
U_BOOT_CMD(
sp2541, 1, 1, do_sp2541,
"sp2541\n",
NULL
);
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