static void phy_ready(void)
{
int modemstate = bb_getpowerstate();
if (dlevel & DLEVEL_PM)
pr_info("%s.\n", __func__);
switch (modemstate) {
case BBSTATE_UNKNOWN:
/* Wait for CP to indicate ready - by driving USB_CWR high. */
if (gpio_wait_timeout(bb_sdata.gpio_cwr, 1, 10) != 0) {
pr_info("%s: Timeout 4 modem ready. Maybe 1st enum ?\n",
__func__);
/* For first enumeration don't drive AWR high */
break;
}
/* Signal AP ready - Drive USB_AWR high. */
pr_info("%s : Driving AWR high.\n", __func__);
bb_set_awr(1);
break;
default:
pr_err("%s: Error. Unexp modemstate %x. Should be %d.\n",
__func__, modemstate, BBSTATE_UNKNOWN);
break;
}
}
static int m7400_enum_handshake(void)
{
int retval = 0;
/* Wait for CP to indicate ready - by driving USB_CWR high. */
if (gpio_wait_timeout(gpio_cwr, 1, 10) != 0) {
pr_info("%s: Error: timeout waiting for modem resume.\n",
__func__);
retval = -1;
}
/* Signal AP ready - Drive USB_AWR high. */
gpio_set_value(gpio_awr, 1);
return retval;
}
static int m7400_apup_handshake(bool checkresponse)
{
int retval = 0;
/* Signal AP ready - Drive USB_AWR high. */
gpio_set_value(gpio_awr, 1);
if (checkresponse) {
/* Wait for CP ack - by driving USB_CWR high. */
if (gpio_wait_timeout(gpio_cwr, 1, 10) != 0) {
pr_info("%s: Error: timeout waiting for modem ack.\n",
__func__);
retval = -1;
}
}
return retval;
}
static int apup_handshake(bool checkresponse)
{
int retval = 0;
/* Signal AP ready - Drive USB_AWR high. */
bb_set_awr(1);
if (checkresponse) {
/* Wait for CP ack - by driving USB_CWR high. */
if (gpio_wait_timeout(bb_sdata.gpio_cwr, 1,
WAKE_TIMEOUT_MS) != 0) {
pr_err("%s: Error: Timeout waiting for modem ack.\n",
__func__);
retval = -1;
}
}
return retval;
}
static void m7400_l2_resume(void)
{
/* Gets called for two cases :
a) L2 resume.
b) bus resume phase of L3 resume. */
if (modem_status == BBSTATE_L0)
return;
/* Pre bus resume: Drive ARR high. */
gpio_set_value(gpio_arr, 1);
/* If host initiated resume - Wait for CP ack (CWR goes high). */
/* If device initiated resume - CWR will be already high. */
if (gpio_wait_timeout(gpio_cwr, 1, 10) != 0) {
pr_info("%s: Error: timeout waiting for modem ack.\n",
__func__);
return;
}
modem_status = BBSTATE_L0;
}
