/*
* tpm_tis_i2c_read() - read from TPM register
* @addr: register address to read from
* @buffer: provided by caller
* @len: number of bytes to read
*
* Read len bytes from TPM register and put them into
* buffer (little-endian format, i.e. first byte is put into buffer[0]).
*
* NOTE: TPM is big-endian for multi-byte values. Multi-byte
* values have to be swapped.
*
* Return -EIO on error, 0 on success.
*/
static int tpm_tis_i2c_read(struct udevice *dev, u8 addr, u8 *buffer,
size_t len)
{
struct tpm_chip *chip = dev_get_priv(dev);
int rc;
int count;
uint32_t addrbuf = addr;
if ((chip->chip_type == SLB9635) || (chip->chip_type == UNKNOWN)) {
/* slb9635 protocol should work in both cases */
for (count = 0; count < MAX_COUNT; count++) {
rc = dm_i2c_write(dev, 0, (uchar *)&addrbuf, 1);
if (rc == 0)
break; /* Success, break to skip sleep */
udelay(SLEEP_DURATION_US);
}
if (rc)
return rc;
/* After the TPM has successfully received the register address
* it needs some time, thus we're sleeping here again, before
* retrieving the data
*/
for (count = 0; count < MAX_COUNT; count++) {
udelay(SLEEP_DURATION_US);
rc = dm_i2c_read(dev, 0, buffer, len);
if (rc == 0)
break; /* success, break to skip sleep */
}
} else {
/*
* Use a combined read for newer chips.
* Unfortunately the smbus functions are not suitable due to
* the 32 byte limit of the smbus.
* Retries should usually not be needed, but are kept just to
* be safe on the safe side.
*/
for (count = 0; count < MAX_COUNT; count++) {
rc = dm_i2c_read(dev, addr, buffer, len);
if (rc == 0)
break; /* break here to skip sleep */
udelay(SLEEP_DURATION_US);
}
}
/* Take care of 'guard time' */
udelay(SLEEP_DURATION_US);
if (rc)
return rc;
return 0;
}
/*
* Set USB VBUS signals (via I2C IO expander/GPIO) as output and set
* output value as disabled
*
* Set USB Current Limit signals (via I2C IO expander/GPIO) as output
* and set output value as enabled
*/
int board_xhci_config(void)
{
struct udevice *dev;
int ret;
u8 buf[8];
if (of_machine_is_compatible("marvell,armada7040-db")) {
/* Configure IO exander PCA9555: 7bit address 0x21 */
ret = i2c_get_chip_for_busnum(0, I2C_IO_EXP_ADDR, 1, &dev);
if (ret) {
printf("Cannot find PCA9555: %d\n", ret);
return 0;
}
/*
* Read configuration (direction) and set VBUS pin as output
* (reset pin = output)
*/
ret = dm_i2c_read(dev, I2C_IO_CFG_REG_0, buf, 1);
if (ret) {
printf("Failed to read IO expander value via I2C\n");
return -EIO;
}
buf[0] &= ~I2C_IO_REG_VBUS;
buf[0] &= ~I2C_IO_REG_CL;
ret = dm_i2c_write(dev, I2C_IO_CFG_REG_0, buf, 1);
if (ret) {
printf("Failed to set IO expander via I2C\n");
return -EIO;
}
/* Read output value and configure it */
ret = dm_i2c_read(dev, I2C_IO_DATA_OUT_REG_0, buf, 1);
if (ret) {
printf("Failed to read IO expander value via I2C\n");
return -EIO;
}
buf[0] &= ~I2C_IO_REG_VBUS;
buf[0] |= I2C_IO_REG_CL;
ret = dm_i2c_write(dev, I2C_IO_DATA_OUT_REG_0, buf, 1);
if (ret) {
printf("Failed to set IO expander via I2C\n");
return -EIO;
}
mdelay(500); /* required delay to let output value settle */
}
return 0;
}
static int nand_sw_detect(void)
{
int rc;
uchar data[2];
struct udevice *dev;
rc = i2c_get_chip_for_busnum(NAND_PCF8575_I2C_BUS_NUM,
NAND_PCF8575_ADDR, 0, &dev);
if (rc)
return -1;
rc = dm_i2c_read(dev, 0, (uint8_t *)&data, sizeof(data));
if (rc)
return -1;
/* We are only interested in P10 and P11 on PCF8575 which is equal to
* bits 8 and 9.
*/
data[1] = data[1] & 0x3;
/* Ensure only P11 is set and P10 is cleared. This ensures only
* NAND (P10) is configured and not NOR (P11) which are both low
* true signals. NAND and NOR settings should not be enabled at
* the same time.
*/
if (data[1] == 0x2)
return 0;
return -1;
}
static int set_ethaddr_from_at24mac(void)
{
const int ETH_ADDR_LEN = 6;
unsigned char ethaddr[ETH_ADDR_LEN];
const char *ETHADDR_NAME = "ethaddr";
struct udevice *bus, *dev;
if (getenv(ETHADDR_NAME))
return 0;
if (uclass_get_device_by_seq(UCLASS_I2C, AT24MAC_ON_I2C_BUS, &bus)) {
printf("Cannot find I2C bus\n");
return -1;
}
if (dm_i2c_probe(bus, AT24MAC_ADDR, 0, &dev)) {
printf("Failed to probe I2C device chip\n");
return -1;
}
if (dm_i2c_read(dev, AT24MAC_REG, ethaddr, ETH_ADDR_LEN)) {
printf("Failed to read ethernet address from AT24MAC\n");
return -1;
}
if (!is_valid_ethaddr(ethaddr)) {
printf("The ethernet address read from AT24MAC is not valid\n");
return -1;
}
return eth_setenv_enetaddr(ETHADDR_NAME, ethaddr);
}
static int pcf2127_rtc_get(struct udevice *dev, struct rtc_time *tm)
{
int ret = 0;
uchar buf[10] = { PCF2127_REG_CTRL1 };
ret = dm_i2c_write(dev, PCF2127_REG_CTRL1, buf, 1);
if (ret < 0)
return ret;
ret = dm_i2c_read(dev, PCF2127_REG_CTRL1, buf, sizeof(buf));
if (ret < 0)
return ret;
if (buf[PCF2127_REG_CTRL3] & 0x04)
puts("### Warning: RTC Low Voltage - date/time not reliable\n");
tm->tm_sec = bcd2bin(buf[PCF2127_REG_SC] & 0x7F);
tm->tm_min = bcd2bin(buf[PCF2127_REG_MN] & 0x7F);
tm->tm_hour = bcd2bin(buf[PCF2127_REG_HR] & 0x3F);
tm->tm_mday = bcd2bin(buf[PCF2127_REG_DM] & 0x3F);
tm->tm_mon = bcd2bin(buf[PCF2127_REG_MO] & 0x1F) - 1;
tm->tm_year = bcd2bin(buf[PCF2127_REG_YR]) + 1900;
if (tm->tm_year < 1970)
tm->tm_year += 100; /* assume we are in 1970...2069 */
tm->tm_wday = buf[PCF2127_REG_DW] & 0x07;
tm->tm_yday = 0;
tm->tm_isdst = 0;
debug("Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
tm->tm_year, tm->tm_mon, tm->tm_mday, tm->tm_wday,
tm->tm_hour, tm->tm_min, tm->tm_sec);
return ret;
}
static int pca953x_read_regs(struct udevice *dev, int reg, u8 *val)
{
struct pca953x_info *info = dev_get_platdata(dev);
int ret = 0;
if (info->gpio_count <= 8) {
ret = dm_i2c_read(dev, reg, val, 1);
} else if (info->gpio_count <= 16) {
ret = dm_i2c_read(dev, reg << 1, val, info->bank_count);
} else {
dev_err(dev, "Unsupported now\n");
return -EINVAL;
}
return ret;
}
static int act8846_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
{
if (dm_i2c_read(dev, reg, buff, len)) {
debug("read error from device: %p register: %#x!\n", dev, reg);
return -EIO;
}
return 0;
}
static int lp873x_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
{
if (dm_i2c_read(dev, reg, buff, len)) {
error("read error from device: %p register: %#x!", dev, reg);
return -EIO;
}
return 0;
}
static int max8997_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
{
int ret;
ret = dm_i2c_read(dev, reg, buff, len);
if (ret)
pr_err("read error from device: %p register: %#x!", dev, reg);
return ret;
}
static int stpmu1_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
{
int ret;
ret = dm_i2c_read(dev, reg, buff, len);
if (ret)
dev_err(dev, "%s: failed to read register %#x : %d",
__func__, reg, ret);
return ret;
}
static int pmic_tps65910_read(struct udevice *dev, uint reg, u8 *buffer,
int len)
{
int ret;
ret = dm_i2c_read(dev, reg, buffer, len);
if (ret)
pr_err("%s read error on register %02x\n", dev->name, reg);
return ret;
}
int dm_i2c_reg_read(struct udevice *dev, uint offset)
{
uint8_t val;
int ret;
ret = dm_i2c_read(dev, offset, &val, 1);
if (ret < 0)
return ret;
return val;
}
int i2c_read(uint8_t chip_addr, unsigned int addr, int alen, uint8_t *buffer,
int len)
{
struct udevice *dev;
int ret;
ret = i2c_compat_get_device(chip_addr, alen, &dev);
if (ret)
return ret;
return dm_i2c_read(dev, addr, buffer, len);
}
/*
* st33zp24_i2c_read8_reg
* Recv byte from the TIS register according to the ST33ZP24 I2C protocol.
* @param: tpm_register, the tpm tis register where the data should be read
* @param: tpm_data, the TPM response
* @param: tpm_size, tpm TPM response size to read.
* @return: Number of byte read successfully else an error code.
*/
static int st33zp24_i2c_read8_reg(struct udevice *dev, u8 tpm_register,
u8 *tpm_data, size_t tpm_size)
{
int status;
u8 data;
data = TPM_DUMMY_BYTE;
status = st33zp24_i2c_write8_reg(dev, tpm_register, &data, 1);
if (status < 0)
return status;
return dm_i2c_read(dev, 0, tpm_data, tpm_size);
}
static int pca953x_read_single(struct udevice *dev, int reg, u8 *val,
int offset)
{
struct pca953x_info *info = dev_get_platdata(dev);
int bank_shift = fls((info->gpio_count - 1) / BANK_SZ);
int off = offset / BANK_SZ;
int ret;
u8 byte;
ret = dm_i2c_read(dev, (reg << bank_shift) + off, &byte, 1);
if (ret) {
dev_err(dev, "%s error\n", __func__);
return ret;
}
*val = byte;
return 0;
}
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;
}
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;
}
}
int board_xhci_enable(void)
{
struct udevice *dev;
int ret;
u8 buf[8];
if (of_machine_is_compatible("marvell,armada7040-db")) {
/*
* This function enables all USB ports simultaniously,
* it only needs to get called once
*/
if (usb_enabled)
return 0;
/* Configure IO exander PCA9555: 7bit address 0x21 */
ret = i2c_get_chip_for_busnum(0, I2C_IO_EXP_ADDR, 1, &dev);
if (ret) {
printf("Cannot find PCA9555: %d\n", ret);
return 0;
}
/* Read VBUS output value */
ret = dm_i2c_read(dev, I2C_IO_DATA_OUT_REG_0, buf, 1);
if (ret) {
printf("Failed to read IO expander value via I2C\n");
return -EIO;
}
/* Enable VBUS power: Set output value of VBUS pin as enabled */
buf[0] |= I2C_IO_REG_VBUS;
ret = dm_i2c_write(dev, I2C_IO_DATA_OUT_REG_0, buf, 1);
if (ret) {
printf("Failed to set IO expander via I2C\n");
return -EIO;
}
mdelay(500); /* required delay to let output value settle */
usb_enabled = 1;
}
return 0;
}
int arch_misc_init(void)
{
/* Disable PMIC sleep mode on low supply voltage */
struct udevice *dev;
u8 addr, data[1];
int err;
err = i2c_get_chip_for_busnum(0, PMU_I2C_ADDRESS, 1, &dev);
if (err) {
debug("%s: Cannot find PMIC I2C chip\n", __func__);
return err;
}
addr = PMU_SUPPLYENE;
err = dm_i2c_read(dev, addr, data, 1);
if (err) {
debug("failed to get PMU_SUPPLYENE\n");
return err;
}
data[0] &= ~PMU_SUPPLYENE_SYSINEN;
data[0] |= PMU_SUPPLYENE_EXITSLREQ;
err = dm_i2c_write(dev, addr, data, 1);
if (err) {
debug("failed to set PMU_SUPPLYENE\n");
return err;
}
/* make sure SODIMM pin 87 nRESET_OUT is released properly */
pinmux_set_func(PMUX_PINGRP_ATA, PMUX_FUNC_GMI);
if (readl(NV_PA_BASE_SRAM + NVBOOTINFOTABLE_BOOTTYPE) ==
NVBOOTTYPE_RECOVERY)
printf("USB recovery mode\n");
return 0;
}
void reset_cpu(ulong addr)
{
struct udevice *dev;
const u8 pmic_bus = 6;
const u8 pmic_addr = 0x5a;
u8 data;
int ret;
ret = i2c_get_chip_for_busnum(pmic_bus, pmic_addr, 1, &dev);
if (ret)
hang();
ret = dm_i2c_read(dev, 0x13, &data, 1);
if (ret)
hang();
data |= BIT(1);
ret = dm_i2c_write(dev, 0x13, &data, 1);
if (ret)
hang();
}
int board_late_init(void)
{
struct udevice *dev;
u8 buf[8];
int ret;
/* Configure SMSC USB2513 USB Hub: 7bit address 0x2c */
ret = i2c_get_chip_for_busnum(0, 0x2c, 1, &dev);
if (ret) {
printf("Cannot find USB2513: %d\n", ret);
return 0;
}
/*
* The first access to the USB Hub fails sometimes, so lets read
* a dummy byte to be sure here
*/
dm_i2c_read(dev, 0x00, buf, 1);
/*
* The SMSC hub is not visible on the I2C bus after the first
* configuration at power-up. The following code deliberately
* does not report upon failure of these I2C write calls.
*/
buf[0] = 0x93;
dm_i2c_write(dev, 0x06, buf, 1);
buf[0] = 0xaa;
dm_i2c_write(dev, 0xf8, buf, 1);
buf[0] = 0x0f;
dm_i2c_write(dev, 0xfa, buf, 1);
buf[0] = 0x01;
dm_i2c_write(dev, 0xff, buf, 1);
return 0;
}
static int cros_ec_i2c_command(struct udevice *udev, uint8_t cmd,
int cmd_version, const uint8_t *dout,
int dout_len, uint8_t **dinp, int din_len)
{
struct cros_ec_dev *dev = dev_get_uclass_priv(udev);
/* version8, cmd8, arglen8, out8[dout_len], csum8 */
int out_bytes = dout_len + 4;
/* response8, arglen8, in8[din_len], checksum8 */
int in_bytes = din_len + 3;
uint8_t *ptr;
/* Receive input data, so that args will be dword aligned */
uint8_t *in_ptr;
int len, csum, ret;
/*
* Sanity-check I/O sizes given transaction overhead in internal
* buffers.
*/
if (out_bytes > sizeof(dev->dout)) {
debug("%s: Cannot send %d bytes\n", __func__, dout_len);
return -1;
}
if (in_bytes > sizeof(dev->din)) {
debug("%s: Cannot receive %d bytes\n", __func__, din_len);
return -1;
}
assert(dout_len >= 0);
assert(dinp);
/*
* Copy command and data into output buffer so we can do a single I2C
* burst transaction.
*/
ptr = dev->dout;
/*
* in_ptr starts of pointing to a dword-aligned input data buffer.
* We decrement it back by the number of header bytes we expect to
* receive, so that the first parameter of the resulting input data
* will be dword aligned.
*/
in_ptr = dev->din + sizeof(int64_t);
if (dev->protocol_version != 2) {
/* Something we don't support */
debug("%s: Protocol version %d unsupported\n",
__func__, dev->protocol_version);
return -1;
}
*ptr++ = EC_CMD_VERSION0 + cmd_version;
*ptr++ = cmd;
*ptr++ = dout_len;
in_ptr -= 2; /* Expect status, length bytes */
memcpy(ptr, dout, dout_len);
ptr += dout_len;
*ptr++ = (uint8_t)
cros_ec_calc_checksum(dev->dout, dout_len + 3);
/* Send output data */
cros_ec_dump_data("out", -1, dev->dout, out_bytes);
ret = dm_i2c_write(udev, 0, dev->dout, out_bytes);
if (ret) {
debug("%s: Cannot complete I2C write to %s\n", __func__,
udev->name);
ret = -1;
}
if (!ret) {
ret = dm_i2c_read(udev, 0, in_ptr, in_bytes);
if (ret) {
debug("%s: Cannot complete I2C read from %s\n",
__func__, udev->name);
ret = -1;
}
}
if (*in_ptr != EC_RES_SUCCESS) {
debug("%s: Received bad result code %d\n", __func__, *in_ptr);
return -(int)*in_ptr;
}
len = in_ptr[1];
if (len + 3 > sizeof(dev->din)) {
debug("%s: Received length %#02x too large\n",
__func__, len);
return -1;
}
csum = cros_ec_calc_checksum(in_ptr, 2 + len);
if (csum != in_ptr[2 + len]) {
debug("%s: Invalid checksum rx %#02x, calced %#02x\n",
__func__, in_ptr[2 + din_len], csum);
return -1;
}
din_len = min(din_len, len);
cros_ec_dump_data("in", -1, in_ptr, din_len + 3);
/* Return pointer to dword-aligned input data, if any */
*dinp = dev->din + sizeof(int64_t);
return din_len;
}
static int i2c_eeprom_std_read(struct udevice *dev, int offset, uint8_t *buf,
int size)
{
return dm_i2c_read(dev, offset, buf, size);
}
