int i2c_get_chip_for_busnum(int busnum, int chip_addr, uint offset_len,
struct udevice **devp)
{
struct udevice *bus;
int ret;
ret = uclass_get_device_by_seq(UCLASS_I2C, busnum, &bus);
if (ret) {
debug("Cannot find I2C bus %d\n", busnum);
return ret;
}
/* detect the presence of the chip on the bus */
ret = i2c_probe_chip(bus, chip_addr, 0);
debug("%s: bus='%s', address %02x, ret=%d\n", __func__, bus->name,
chip_addr, ret);
if (ret) {
debug("Cannot detect I2C chip %02x on bus %d\n", chip_addr,
busnum);
return ret;
}
ret = i2c_get_chip(bus, chip_addr, offset_len, devp);
if (ret) {
debug("Cannot find I2C chip %02x on bus %d\n", chip_addr,
busnum);
return ret;
}
return 0;
}
static bool disable_mcu_watchdog(void)
{
struct udevice *bus, *dev;
int ret, retry = 3;
uchar buf[1] = {0x0};
if (uclass_get_device_by_name(UCLASS_I2C, OMNIA_I2C_MCU_DM_NAME, &bus)) {
puts("Cannot find MCU bus! Can not disable MCU WDT.\n");
return false;
}
ret = i2c_get_chip(bus, OMNIA_I2C_MCU, 1, &dev);
if (ret) {
puts("Cannot get MCU chip! Can not disable MCU WDT.\n");
return false;
}
for (; retry > 0; --retry)
if (!dm_i2c_write(dev, OMNIA_I2C_MCU_WDT_ADDR, (uchar *) buf, 1))
break;
if (retry <= 0) {
puts("I2C MCU watchdog failed to disable!\n");
return false;
}
return true;
}
/**
* ti_i2c_set_alen - Set chip's i2c address length
* @bus_addr - I2C bus number
* @dev_addr - I2C eeprom id
* @alen - I2C address length in bytes
*
* DM_I2C by default sets the address length to be used to 1. This
* function allows this address length to be changed to match the
* eeprom used for board detection.
*/
int __maybe_unused ti_i2c_set_alen(int bus_addr, int dev_addr, int alen)
{
struct udevice *dev;
struct udevice *bus;
int rc;
rc = uclass_get_device_by_seq(UCLASS_I2C, bus_addr, &bus);
if (rc)
return rc;
rc = i2c_get_chip(bus, dev_addr, 1, &dev);
if (rc)
return rc;
rc = i2c_set_chip_offset_len(dev, alen);
if (rc)
return rc;
return 0;
}
int i2c_get_chip_for_busnum(int busnum, int chip_addr, struct udevice **devp)
{
struct udevice *bus;
int ret;
ret = uclass_get_device_by_seq(UCLASS_I2C, busnum, &bus);
if (ret) {
debug("Cannot find I2C bus %d\n", busnum);
return ret;
}
ret = i2c_get_chip(bus, chip_addr, devp);
if (ret) {
debug("Cannot find I2C chip %02x on bus %d\n", chip_addr,
busnum);
return ret;
}
return 0;
}
static bool omnia_detect_sata(void)
{
struct udevice *bus, *dev;
int ret, retry = 3;
u16 mode;
puts("SERDES0 card detect: ");
if (uclass_get_device_by_name(UCLASS_I2C, OMNIA_I2C_MCU_DM_NAME, &bus)) {
puts("Cannot find MCU bus!\n");
return false;
}
ret = i2c_get_chip(bus, OMNIA_I2C_MCU, 1, &dev);
if (ret) {
puts("Cannot get MCU chip!\n");
return false;
}
for (; retry > 0; --retry) {
ret = dm_i2c_read(dev, OMNIA_I2C_MCU_ADDR_STATUS, (uchar *) &mode, 2);
if (!ret)
break;
}
if (!retry) {
puts("I2C read failed! Default PEX\n");
return false;
}
if (!(mode & OMNIA_I2C_MCU_CARDDET)) {
puts("NONE\n");
return false;
}
if (mode & OMNIA_I2C_MCU_SATA) {
puts("SATA\n");
return true;
} else {
puts("PEX\n");
return false;
}
}
static bool omnia_read_eeprom(struct omnia_eeprom *oep)
{
struct udevice *bus, *dev;
int ret, crc, retry = 3;
if (uclass_get_device_by_name(UCLASS_I2C, OMNIA_I2C_EEPROM_DM_NAME, &bus)) {
puts("Cannot find EEPROM bus\n");
return false;
}
ret = i2c_get_chip(bus, OMNIA_I2C_EEPROM, OMNIA_I2C_EEPROM_ADDRLEN, &dev);
if (ret) {
puts("Cannot get EEPROM chip\n");
return false;
}
for (; retry > 0; --retry) {
ret = dm_i2c_read(dev, OMNIA_I2C_EEPROM_CONFIG_ADDR, (uchar *) oep, sizeof(struct omnia_eeprom));
if (ret)
continue;
if (oep->magic != OMNIA_I2C_EEPROM_MAGIC) {
puts("I2C EEPROM missing magic number!\n");
continue;
}
crc = crc32(0, (unsigned char *) oep,
sizeof(struct omnia_eeprom) - 4);
if (crc == oep->crc) {
break;
} else {
printf("CRC of EEPROM memory config failed! "
"calc=0x%04x saved=0x%04x\n", crc, oep->crc);
}
}
if (!retry) {
puts("I2C EEPROM read failed!\n");
return false;
}
return true;
}
int dm_i2c_probe(struct udevice *bus, uint chip_addr, uint chip_flags,
struct udevice **devp)
{
int ret;
*devp = NULL;
/* First probe that chip */
ret = i2c_probe_chip(bus, chip_addr, chip_flags);
debug("%s: bus='%s', address %02x, ret=%d\n", __func__, bus->name,
chip_addr, ret);
if (ret)
return ret;
/* The chip was found, see if we have a driver, and probe it */
ret = i2c_get_chip(bus, chip_addr, 1, devp);
debug("%s: i2c_get_chip: ret=%d\n", __func__, ret);
return ret;
}
int pmu_set_nominal(void)
{
struct udevice *bus, *dev;
int core, cpu;
int ret;
/* by default, the table has been filled with T25 settings */
switch (tegra_get_chip_sku()) {
case TEGRA_SOC_T20:
core = VDD_CORE_NOMINAL_T20;
cpu = VDD_CPU_NOMINAL_T20;
break;
case TEGRA_SOC_T25:
core = VDD_CORE_NOMINAL_T25;
cpu = VDD_CPU_NOMINAL_T25;
break;
default:
debug("%s: Unknown SKU id\n", __func__);
return -1;
}
ret = tegra_i2c_get_dvc_bus(&bus);
if (ret) {
debug("%s: Cannot find DVC I2C bus\n", __func__);
return ret;
}
ret = i2c_get_chip(bus, PMI_I2C_ADDRESS, &dev);
if (ret) {
debug("%s: Cannot find DVC I2C chip\n", __func__);
return ret;
}
tps6586x_init(dev);
tps6586x_set_pwm_mode(TPS6586X_PWM_SM1);
return tps6586x_adjust_sm0_sm1(core, cpu, VDD_TRANSITION_STEP,
VDD_TRANSITION_RATE, VDD_RELATION);
}