/**
* ipa_data_resume() - Initiate USB resume functionality
* @gp: Gadget IPA port
* @port_num: port number used by function
*
* It is being used to initiate USB resume functionality
* for USB bus resume case.
*/
void ipa_data_resume(struct gadget_ipa_port *gp, u8 port_num)
{
struct ipa_data_ch_info *port;
unsigned long flags;
struct usb_gadget *gadget = NULL;
int ret;
pr_debug("dev:%p port number:%d\n", gp, port_num);
if (port_num >= n_ipa_ports) {
pr_err("invalid ipa portno#%d\n", port_num);
return;
}
if (!gp) {
pr_err("data port is null\n");
return;
}
port = ipa_data_ports[port_num];
if (!port) {
pr_err("port %u is NULL", port_num);
return;
}
pr_debug("%s: resume started\n", __func__);
spin_lock_irqsave(&port->port_lock, flags);
gadget = port->port_usb->cdev->gadget;
if (!gadget) {
spin_unlock_irqrestore(&port->port_lock, flags);
pr_err("%s(): Gadget is NULL.\n", __func__);
return;
}
ret = usb_bam_register_wake_cb(port->dst_connection_idx, NULL, NULL);
if (ret) {
spin_unlock_irqrestore(&port->port_lock, flags);
pr_err("%s(): Failed to register BAM wake callback.\n",
__func__);
return;
}
if (msm_dwc3_reset_ep_after_lpm(gadget)) {
configure_fifo(port->src_bam_idx, port->port_usb->out);
configure_fifo(port->dst_bam_idx, port->port_usb->in);
spin_unlock_irqrestore(&port->port_lock, flags);
msm_dwc3_reset_dbm_ep(port->port_usb->in);
spin_lock_irqsave(&port->port_lock, flags);
usb_bam_resume(&port->ipa_params);
}
spin_unlock_irqrestore(&port->port_lock, flags);
}
static void bam2bam_data_resume_work(struct work_struct *w)
{
struct bam_data_port *port =
container_of(w, struct bam_data_port, resume_w);
struct bam_data_ch_info *d = &port->data_ch;
struct data_port *d_port = port->port_usb;
struct usb_gadget *gadget = d_port->cdev->gadget;
int ret;
pr_debug("%s: resume work started\n", __func__);
if (!port->is_connected) {
pr_info("%s: Port is disconnected. Bailing out.\n", __func__);
return;
}
ret = usb_bam_register_wake_cb(d->dst_connection_idx, NULL, NULL);
if (ret) {
pr_err("%s(): Failed to un-register BAM wake callback.\n",
__func__);
return;
}
if (d->trans == USB_GADGET_XPORT_BAM2BAM_IPA) {
if (gadget_is_dwc3(gadget) &&
msm_dwc3_reset_ep_after_lpm(gadget)) {
configure_usb_data_fifo(d->src_bam_idx,
port->port_usb->out,
d->src_pipe_type);
configure_usb_data_fifo(d->dst_bam_idx,
port->port_usb->in,
d->dst_pipe_type);
msm_dwc3_reset_dbm_ep(port->port_usb->in);
}
usb_bam_resume(&d->ipa_params);
}
}