static int hvsi_handshake(struct hvsi_struct *hp)
{
int ret;
/*
* We could have a CLOSE or other data waiting for us before we even try
* to open; try to throw it all away so we don't get confused. (CLOSE
* is the first message sent up the pipe when the FSP comes online. We
* need to distinguish between "it came up a while ago and we're the first
* user" and "it was just reset before it saw our handshake packet".)
*/
hvsi_drain_input(hp);
set_state(hp, HVSI_WAIT_FOR_VER_RESPONSE);
ret = hvsi_query(hp, VSV_SEND_VERSION_NUMBER);
if (ret < 0) {
printk(KERN_ERR "hvsi%i: couldn't send version query\n", hp->index);
return ret;
}
ret = hvsi_wait(hp, HVSI_OPEN);
if (ret < 0)
return ret;
return 0;
}
static int hvsi_get_mctrl(struct hvsi_struct *hp)
{
int ret;
set_state(hp, HVSI_WAIT_FOR_MCTRL_RESPONSE);
hvsi_query(hp, VSV_SEND_MODEM_CTL_STATUS);
ret = hvsi_wait(hp, HVSI_OPEN);
if (ret < 0) {
printk(KERN_ERR "hvsi%i: didn't get modem flags\n", hp->index);
set_state(hp, HVSI_OPEN);
return ret;
}
pr_debug("%s: mctrl 0x%x\n", __FUNCTION__, hp->mctrl);
return 0;
}
static int hvsi_get_mctrl(struct hvsi_struct *hp)
{
int ret;
set_state(hp, HVSI_WAIT_FOR_MCTRL_RESPONSE);
hvsi_query(hp, VSV_SEND_MODEM_CTL_STATUS);
ret = hvsi_wait(hp, HVSI_OPEN);
if (ret < 0) {
;
set_state(hp, HVSI_OPEN);
return ret;
}
pr_debug("%s: mctrl 0x%x\n", __func__, hp->mctrl);
return 0;
}
