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iBoot/drivers/ti/sn2400/sn2400.c

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/*
* Copyright (C) 2007-2008 Apple Inc. All rights reserved.
* Copyright (C) 2006 Apple Computer, Inc. All rights reserved.
*
* This document is the property of Apple Inc.
* It is considered confidential and proprietary.
*
* This document may not be reproduced or transmitted in any form,
* in whole or in part, without the express written permission of
* Apple Inc.
*/
#include <debug.h>
#include <drivers/iic.h>
#include <drivers/charger.h>
#include <drivers/power.h>
#include <platform.h>
#include <platform/gpiodef.h>
#include <sys.h>
#include <sys/boot.h>
#include <sys/menu.h>
#include <sys/task.h>
#include <target/powerconfig.h>
#define SN2400_ADDR_R 0xEA
#define SN2400_ADDR_W 0xEB
static int charger_reset_battery_protection(void);
enum {
FAULT_LOG = 0x00,
FAULT_LOG_BAT_SHORT = (1 << 0),
IRQ_1_MASK = 0x01,
IRQ_2_MASK = 0x02,
IRQ_3_MASK = 0x03,
EVENT_count = 3,
EVENT_1 = 0x04,
EVENT_1_VBUS_OV = (1 << 7),
EVENT_1_VBUS_UV = (1 << 6),
EVENT_1_VBUS_OC = (1 << 5),
EVENT_1_OVER_TEMP = (1 << 4),
EVENT_1_TEMP_WARNING = (1 << 3),
EVENT_1_BAT_SHORT = (1 << 2),
EVENT_1_MAIN_SHORT = (1 << 1),
EVENT_1_RECOVERY_TIMEOUT = (1 << 0),
EVENT_2 = 0x05,
EVENT_2_LDO_OCP = (1 << 7),
EVENT_2_BATT_ALERT = (1 << 6),
EVENT_2_MISSING_BATTERY = (1 << 5),
EVENT_2_HDQ_HOST_ALERT = (1 << 4),
EVENT_2_VBUS_VLIM_ACTIVE = (1 << 3),
EVENT_2_ACCUM_OVERFLOW = (1 << 2),
EVENT_2_ADC_DONE = (1 << 1),
EVENT_2_HDQ_INT = (1 << 0),
EVENT_3 = 0x06,
EVENT_3_MAX_DUTY = (1 << 2),
EVENT_3_ZERO_IBAT = (1 << 1),
EVENT_3_VBUS_DET = (1 << 0),
SYSTEM_STATE = 0x07,
SYSTEM_STATE_BUCK_EN_STAT = (1 << 7),
SYSTEM_STATE_EXT_OVP_STAT = (1 << 6),
SYSTEM_STATE_VBUS_DET_STAT = (1 << 5),
SYSTEM_STATE_SYS_ALIVE_STAT = (1 << 4),
SYSTEM_STATE_DISCHARGE_BAT_STAT = (1 << 3),
SYSTEM_STATE_IBAT_ZERO = (1 << 2),
SYSTEM_STATE_RECOVERY_STAT = (1 << 1),
SYSTEM_STATE_CHARGE_EN = (1 << 0),
DC_LIMITER = 0x08,
DC_LIMITER_I_REDUCED = (1 << 6),
DC_LIMITER_BUCK_EN = (1 << 5),
DC_LIMITER_VBUS_LIM = (1 << 4),
DC_LIMITER_ICHG_LIM = (1 << 3),
DC_LIMITER_VBAT_LIM = (1 << 2),
DC_LIMITER_VMAIN_LIM = (1 << 1),
DC_LIMITER_VBUS_VLIM = (1 << 0),
INPUT_CURRENT_LIMIT = 0x09,
INPUT_CURRENT_LIMIT_base = 90,
INPUT_CURRENT_LIMIT_step = 10,
INPUT_CURRENT_LIMIT_100mA = 0x01,
INPUT_CURRENT_LIMIT_500mA = 0x29,
INPUT_CURRENT_LIMIT_1000mA = 0x5B,
INPUT_CURRENT_LIMIT_1500mA = 0x8D,
INPUT_CURRENT_LIMIT_2000mA = 0xBF,
INPUT_CURRENT_LIMIT_max = INPUT_CURRENT_LIMIT_2000mA,
POR_INPUT_CURRENT_LIMIT = 0x0A,
ACTUAL_INPUT_CURRENT_LIMIT = 0x0B,
TARGET_CHARGE_CURRENT = 0x0C,
CHARGE_CURRENT_base = 0,
CHARGE_CURRENT_step = 10,
CHARGE_CURRENT_disabled = 0x00,
CHARGE_CURRENT_10mA = 0x01,
CHARGE_CURRENT_max = 0xFF,
HOST_CONTROLLED_CHARGE_CURRENT = 0x0D,
ACTUAL_CHARGE_CURRENT = 0x0E,
TARGET_VOLTAGE_REGULATION = 0x0F,
VOLTAGE_REGULATION_base = 3000,
VOLTAGE_REGULATION_step = 10,
VOLTAGE_REGULATION_3000mV = 0x00,
VOLTAGE_REGULATION_4200mV = 0x78,
VOLTAGE_REGULATION_4300mV = 0x82,
VOLTAGE_REGULATION_4500mV = 0x96,
VOLTAGE_REGULATION_max = VOLTAGE_REGULATION_4500mV,
CONTROL = 0x10,
CONTROL_EN_ADAPTER_HS = (1 << 4),
CONTROL_USB_SUSP = (1 << 3),
CONTROL_VBUS_IMIL_SEL = (1 << 2),
CONTROL_BUCK_FREQ_SHIFT_mask = (3 << 0),
CONTROL_BUCK_FREQ_SHIFT_normal = (0 << 0),
CONTROL_BUCK_FREQ_SHIFT_plus_150 = (1 << 0),
CONTROL_BUCK_FREQ_SHIFT_minus_150 = (2 << 0),
CONTROL_BUCK_FREQ_SHIFT_spread = (3 << 0),
ADC_CONTROL = 0x11,
ADC_CONTROL_MANUAL_START = (1 << 4),
ADC_CONTROL_CHANNEL_mask = (7 << 1),
ADC_CONTROL_CHANNEL_vbus = (0 << 1),
ADC_CONTROL_CHANNEL_ibus = (1 << 1),
ADC_CONTROL_CHANNEL_ibat = (2 << 1),
ADC_CONTROL_CHANNEL_vdd_main = (3 << 1),
ADC_CONTROL_CHANNEL_die_temp = (4 << 1),
ADC_CONTROL_CHANNEL_vbat = (5 << 1),
ADC_CONTROL_ACCUM_RESET = (1 << 0),
ADC_OUTPUT = 0x12,
IBUS_AUTO = 0x13,
VBUS_AUTO = 0x14,
ADC_IBUS_ACCUMULATION_3 = 0x15,
ADC_IBUS_ACCUMULATION_2 = 0x16,
ADC_IBUS_ACCUMULATION_1 = 0x17,
ADC_VBUS_ACCUMULATION_3 = 0x18,
ADC_VBUS_ACCUMULATION_2 = 0x19,
ADC_VBUS_ACCUMULATION_1 = 0x1A,
SAMPLE_COUNT_2 = 0x1B,
SAMPLE_COUNT_1 = 0x1C,
HDQ_INTERFACE = 0x1D,
HDQ_INTERFACE_HDQ_MSTR_mask = (3 << 6),
HDQ_INTERFACE_HDQ_MSTR_none = (3 << 6),
HDQ_INTERFACE_HDQ_MSTR_charger = (3 << 6),
HDQ_INTERFACE_HDQ_MSTR_host = (3 << 6),
HDQ_INTERFACE_HDQ_MSTR_bmu = (3 << 6),
HDQ_INTERFACE_HDQ_HOST_EN = (1 << 5),
HDQ_INTERFACE_MISSING_BATTERY = (1 << 4),
HDQ_INTERFACE_MSTR_REQ_CHGR = (1 << 3),
HDQ_INTERFACE_MSTR_REQ_HOST = (1 << 2),
HDQ_INTERFACE_MSTR_REQ_BMU = (1 << 1),
HDQ_INTERFACE_MSTR_FORCE_HOST = (1 << 0),
TEST_MODE_ENABLE = 0x20,
TEST_MODE_ENABLE_off = 0x00,
TEST_MODE_ENABLE_on = 0xA5,
TEST_MODE_CONTROL = 0x21,
TEST_MODE_CONTROL_ENB_AUTOCONV = (1 << 5),
TEST_MODE_CONTROL_EN_FORCEMODE = (1 << 4),
TEST_MODE_CONTROL_FORCE_MODE_mask = (3 << 2),
TEST_MODE_CONTROL_FORCE_MODE_stdby = (0 << 2),
TEST_MODE_CONTROL_FORCE_MODE_chgdis = (1 << 2),
TEST_MODE_CONTROL_FORCE_MODE_recov = (2 << 2),
TEST_MODE_CONTROL_FORCE_MODE_normal = (3 << 2),
TEST_MODE_CONTROL_GG_DIS = (1 << 1),
TEST_MODE_CONTROL_SOFT_RESET = (1 << 0),
};
static int charger_write(uint8_t reg, uint8_t value)
{
uint8_t data[2] = { reg, value };
return iic_write(CHARGER_IIC_BUS, SN2400_ADDR_W, data, sizeof(data));
}
static int charger_read(uint8_t reg, uint8_t *data)
{
return iic_read(CHARGER_IIC_BUS, SN2400_ADDR_R, &reg, sizeof(reg), data, sizeof(uint8_t), IIC_NORMAL);
}
static int charger_readn(uint8_t reg, uint8_t *data, unsigned int count)
{
return iic_read(CHARGER_IIC_BUS, SN2400_ADDR_R, &reg, sizeof(reg), data, count, IIC_NORMAL);
}
static int charger_read_events(uint8_t data[EVENT_count])
{
uint8_t reg = EVENT_1;
return iic_read(CHARGER_IIC_BUS, SN2400_ADDR_R, &reg, sizeof(reg), data, EVENT_count, IIC_NORMAL);
}
static int charger_read_adc(uint8_t channel, uint8_t *result)
{
uint8_t data = ADC_CONTROL_MANUAL_START | (channel & ADC_CONTROL_CHANNEL_mask);
if (charger_write(ADC_CONTROL, data) != 0) return -1;
do {
task_sleep(5 * 1000); // data sheet lists 3.7 ms as typ. average time
if (charger_read(ADC_CONTROL, &data) != 0) return -1;
} while (data & ADC_CONTROL_MANUAL_START);
return charger_read(ADC_OUTPUT, result);
}
void charger_early_init(void)
{
// clear any events
uint8_t events[EVENT_count];
charger_read_events(events);
#if TARGET_POWER_NEEDS_BATTERY_PROTECTION_RESET && PRODUCT_LLB
// check status for recovery mode
uint8_t data;
if (charger_read(SYSTEM_STATE, &data) == 0) {
dprintf(DEBUG_INFO, "sn2400 : 0x07=%02x\n", data);
if ((data & SYSTEM_STATE_RECOVERY_STAT) != 0) {
charger_reset_battery_protection();
}
}
#endif
}
void charger_clear_alternate_usb_current_limit(void)
{
uint8_t data;
charger_read(CONTROL, &data);
data |= CONTROL_VBUS_IMIL_SEL;
charger_write(CONTROL, data);
}
bool charger_has_usb(int dock)
{
uint8_t data;
charger_read(SYSTEM_STATE, &data);
return data & SYSTEM_STATE_VBUS_DET_STAT;
}
bool charger_has_firewire(int dock)
{
return false; // FW not supported
}
bool charger_has_external(int dock)
{
return false; // Ext. not supported
}
bool charger_check_usb_change(int dock, bool expected)
{
uint8_t events[EVENT_count];
if (charger_read_events(events) != 0) return false;
if (events[0] & (EVENT_1_VBUS_UV | EVENT_1_VBUS_OV)) return true;
if (events[2] & (EVENT_3_VBUS_DET)) return true;
return false;
}
// CBAT, maybe next...
static uint8_t sn2400_adjust_iset(uint32_t iset)
{
if ( iset==0 ) {
// leave it
} else if ( iset<3 ) {
iset=1;
} else if ( iset<INPUT_CURRENT_LIMIT_500mA ) {
iset-=2; // 20mA
} else if ( iset<INPUT_CURRENT_LIMIT_1000mA ) {
iset-=5; // 50mA
} else if ( iset<INPUT_CURRENT_LIMIT_1500mA ) {
iset-=8; // 80mA
} else {
iset-=10; // 100ma
}
return iset;
}
void charger_set_charging(int dock, uint32_t input_current_ma, uint32_t *charge_current_ma)
{
uint8_t charge_current;
if (*charge_current_ma > (CHARGE_CURRENT_base + (CHARGE_CURRENT_max * CHARGE_CURRENT_step))) {
charge_current = CHARGE_CURRENT_max;
} else {
charge_current = (*charge_current_ma - CHARGE_CURRENT_base) / CHARGE_CURRENT_step;
}
*charge_current_ma -= CHARGE_CURRENT_base + (charge_current * CHARGE_CURRENT_step);
charger_write(HOST_CONTROLLED_CHARGE_CURRENT, charge_current ) ;
if (input_current_ma < 100) {
charger_write(INPUT_CURRENT_LIMIT, INPUT_CURRENT_LIMIT_100mA);
uint8_t data;
if (charger_read(CONTROL, &data) != 0) return;
data |= CONTROL_USB_SUSP;
charger_write(CONTROL, data);
} else {
uint8_t data;
if (charger_read(CONTROL, &data) != 0) return;
if (data & CONTROL_USB_SUSP) {
data &= ~CONTROL_USB_SUSP;
charger_write(CONTROL, data);
task_sleep(100 * 1000);
}
if (charger_read(ACTUAL_INPUT_CURRENT_LIMIT, &data) != 0) return;
uint8_t input_current_limit;
if (input_current_ma > (INPUT_CURRENT_LIMIT_base + (INPUT_CURRENT_LIMIT_max * INPUT_CURRENT_LIMIT_step))) {
input_current_limit = INPUT_CURRENT_LIMIT_max;
} else {
input_current_limit = (input_current_ma - INPUT_CURRENT_LIMIT_base) / INPUT_CURRENT_LIMIT_step;
}
while (data < input_current_limit) {
data += (100 / INPUT_CURRENT_LIMIT_step);
if (data > input_current_limit) data = input_current_limit;
charger_write(INPUT_CURRENT_LIMIT, sn2400_adjust_iset(data) );
task_sleep(10 * 1000);
}
}
}
void charger_clear_usb_state(void)
{
// empty
}
bool charger_charge_done(int dock)
{
uint8_t data;
if (charger_read(SYSTEM_STATE, &data) != 0) return false;
return !(data & SYSTEM_STATE_CHARGE_EN);
}
bool charger_has_batterypack(int dock)
{
return true;
}
uint32_t charger_get_max_charge_current(int dock)
{
return CHARGE_CURRENT_base + (CHARGE_CURRENT_max * CHARGE_CURRENT_step);
}
int charger_read_battery_level(uint32_t *milliVolts)
{
uint8_t adc;
if (charger_read_adc(ADC_CONTROL_CHANNEL_vbat, &adc) != 0) return -1;
*milliVolts = 2500 + (10 * adc);
return 0;
}
int charger_set_gasgauge_interface(bool enabled)
{
if (enabled) {
if (charger_write(HDQ_INTERFACE, HDQ_INTERFACE_MSTR_REQ_HOST) != 0) return -1;
utime_t timeout = system_time() + 1*1000*1000;
for (;;) {
uint8_t data;
if (charger_read(HDQ_INTERFACE, &data) != 0) {
charger_write(HDQ_INTERFACE, 0);
return -1;
}
if (data & HDQ_INTERFACE_HDQ_HOST_EN) break;
if (system_time() > timeout) {
printf("charger HDQ interface request read timed out\n");
return (-1);
}
task_sleep(10 * 1000);
}
} else {
charger_write(HDQ_INTERFACE, 0);
}
return 0;
}
int charger_reset_battery_protection(void)
{
// enter test mode and force charging at 4.3V VBATREG and 10mA
// charging current for 20mS
int ret, ret2;
dprintf(DEBUG_CRITICAL, "starting battery protection reset...\n");
// check all PMU temp sensors for "ambient temperature" check
for (int idx = 1; idx <= 4; idx++) {
int temp_cC;
ret = pmu_read_system_temperature(idx, &temp_cC);
if (ret != 0) {
dprintf(DEBUG_CRITICAL, "temp failure\n");
return -1;
}
if (temp_cC <= 500 || temp_cC >= 4000) {
dprintf(DEBUG_CRITICAL, "system temp %d out of range: %d.%02dC\n", idx, temp_cC / 100, temp_cC % 100);
return -1;
}
}
ret = charger_write(HOST_CONTROLLED_CHARGE_CURRENT, CHARGE_CURRENT_10mA);
if (ret == 0) ret = charger_write(TEST_MODE_ENABLE, TEST_MODE_ENABLE_on);
if (ret == 0) ret = charger_write(TEST_MODE_CONTROL, TEST_MODE_CONTROL_GG_DIS);
if (ret == 0) ret = charger_write(TARGET_CHARGE_CURRENT, CHARGE_CURRENT_disabled);
if (ret == 0) ret = charger_write(TARGET_VOLTAGE_REGULATION, VOLTAGE_REGULATION_4300mV);
if (ret == 0) ret = charger_write(TARGET_CHARGE_CURRENT, CHARGE_CURRENT_10mA);
task_sleep(20 * 1000);
if (ret == 0) ret = charger_write(TARGET_CHARGE_CURRENT, CHARGE_CURRENT_disabled);
if (ret == 0) ret = charger_write(TARGET_VOLTAGE_REGULATION, VOLTAGE_REGULATION_4200mV);
if (ret == 0) ret = charger_write(TEST_MODE_CONTROL, 0x00);
// always attempt to take out of test mode, even on failure
ret2 = charger_write(TEST_MODE_ENABLE, TEST_MODE_ENABLE_off);
if (ret == 0) ret = ret2;
if (ret == 0) ret = charger_write(HOST_CONTROLLED_CHARGE_CURRENT, CHARGE_CURRENT_max);
dprintf(DEBUG_CRITICAL, "battery protection reset completed: %s\n", (ret == 0) ? "success" : "error");
return ret;
}
void charger_print_status(void)
{
int rc;
uint8_t data[7];
rc=charger_readn(SYSTEM_STATE, data, 2);
if ( rc!=0 ) {
dprintf(DEBUG_CRITICAL, "cannot read %x (%d)\n", SYSTEM_STATE, rc);
} else {
rc=charger_readn(ACTUAL_INPUT_CURRENT_LIMIT, &data[2], 5);
if ( rc!=0 ) {
dprintf(DEBUG_CRITICAL, "cannot read %x (%d)\n", ACTUAL_INPUT_CURRENT_LIMIT, rc);
} else {
dprintf(DEBUG_CRITICAL, "sn2400 : 0x07=%02x 0x08=%02x 0x0b=%02x 0x0c=%02x 0x0d=%02x 0x0e=%02x 0x0f=%02x\n",
data[0], data[1], data[2], data[3], data[4], data[5], data[6]);
}
}
}
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