static int anx7688_init(int port)
{
int rv = 0;
int mask = 0;
/*
* 7688 POWER_STATUS[6] is not reliable for tcpci_tcpm_init() to poll
* due to it is default 0 in HW, and we cannot write TCPC until it is
* ready, or something goes wrong. (Issue 52772)
* Instead we poll TCPC 0x50:0xe7 bit6 here to make sure bootdone is
* ready(50ms). Then PD main flow can process cc debounce in 50ms ~
* 100ms to follow cts.
*/
while (1) {
rv = i2c_read8(I2C_PORT_TCPC, ANX7688_USBC_ADDR,
ANX7688_REG_RAMCTRL, &mask);
if (rv == EC_SUCCESS && (mask & ANX7688_REG_RAMCTRL_BOOT_DONE))
break;
msleep(10);
}
rv = tcpci_tcpm_drv.init(port);
if (rv)
return rv;
rv = tcpc_read16(port, TCPC_REG_ALERT_MASK, &mask);
if (rv)
return rv;
/* enable vendor specific alert */
mask |= ANX7688_VENDOR_ALERT;
rv = tcpc_write16(port, TCPC_REG_ALERT_MASK, mask);
return rv;
}
static void anx7688_tcpc_alert(int port)
{
int alert, rv;
rv = tcpc_read16(port, TCPC_REG_ALERT, &alert);
/* process and clear alert status */
tcpci_tcpm_drv.tcpc_alert(port);
if (!rv && (alert & ANX7688_VENDOR_ALERT))
anx7688_update_hpd_enable(port);
}
static int tcpci_tcpm_get_message(int port, uint32_t *payload, int *head)
{
int rv, cnt, reg = TCPC_REG_RX_DATA;
rv = tcpc_read(port, TCPC_REG_RX_BYTE_CNT, &cnt);
rv |= tcpc_read16(port, TCPC_REG_RX_HDR, (int *)head);
if (rv == EC_SUCCESS && cnt > 0) {
tcpc_lock(port, 1);
rv = tcpc_xfer(port,
(uint8_t *)®, 1, (uint8_t *)payload,
cnt, I2C_XFER_SINGLE);
tcpc_lock(port, 0);
}
/* Read complete, clear RX status alert bit */
tcpc_write16(port, TCPC_REG_ALERT, TCPC_REG_ALERT_RX_STATUS);
return rv;
}
static int anx74xx_tcpm_get_message(int port, uint32_t *payload, int *head)
{
int reg = 0, rv = EC_SUCCESS;
int len = 0;
/* Fetch the header */
rv |= tcpc_read16(port, ANX74XX_REG_PD_HEADER, ®);
if (rv) {
*head = 0;
/* Clear receive message interrupt bit(bit-0) */
tcpc_read(port, ANX74XX_REG_IRQ_SOURCE_RECV_MSG, ®);
tcpc_write(port, ANX74XX_REG_IRQ_SOURCE_RECV_MSG,
reg & (~0x01));
return EC_ERROR_UNKNOWN;
}
*head = reg;
len = PD_HEADER_CNT(*head) * 4;
if (!len) {
/* Clear receive message interrupt bit(bit-0) */
tcpc_read(port, ANX74XX_REG_IRQ_SOURCE_RECV_MSG, ®);
tcpc_write(port, ANX74XX_REG_IRQ_SOURCE_RECV_MSG,
reg & (~0x01));
return EC_SUCCESS;
}
/* Receive message : assuming payload have enough
* memory allocated
*/
rv |= anx74xx_read_pd_obj(port, (uint8_t *)payload, len);
if (rv) {
*head = 0;
return EC_ERROR_UNKNOWN;
}
return rv;
}
static int tcpm_alert_status(int port, int *alert)
{
/* Read TCPC Alert register */
return tcpc_read16(port, TCPC_REG_ALERT, alert);
}