/**
* ipa_data_disconnect() - Restore USB ep operation and disable USB endpoint
* @gp: USB gadget IPA Port
* @port_num: Port num used by function driver which need to be disable
*
* It is being called from atomic context from gadget driver when particular
* function is being disable due to USB cable disconnect or USB composition
* switch is being trigger. This API performs restoring USB endpoint operation
* and disable USB endpoint used for accelerated path.
*/
void ipa_data_disconnect(struct gadget_ipa_port *gp, u8 port_num)
{
struct ipa_data_ch_info *port;
unsigned long flags;
struct usb_gadget *gadget = NULL;
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;
}
spin_lock_irqsave(&port->port_lock, flags);
if (port->port_usb) {
gadget = port->port_usb->cdev->gadget;
port->port_usb->ipa_consumer_ep = -1;
port->port_usb->ipa_producer_ep = -1;
if (port->port_usb->in) {
/*
* Disable endpoints.
* Unlocking is needed since disabling the eps might
* stop active transfers and therefore the request
* complete function will be called, where we try
* to obtain the spinlock as well.
*/
if (gadget_is_dwc3(gadget))
msm_ep_unconfig(port->port_usb->in);
spin_unlock_irqrestore(&port->port_lock, flags);
usb_ep_disable(port->port_usb->in);
spin_lock_irqsave(&port->port_lock, flags);
port->port_usb->in->endless = false;
}
if (port->port_usb->out) {
if (gadget_is_dwc3(gadget))
msm_ep_unconfig(port->port_usb->out);
spin_unlock_irqrestore(&port->port_lock, flags);
usb_ep_disable(port->port_usb->out);
spin_lock_irqsave(&port->port_lock, flags);
port->port_usb->out->endless = false;
}
port->port_usb = NULL;
}
spin_unlock_irqrestore(&port->port_lock, flags);
queue_work(ipa_data_wq, &port->disconnect_w);
}
int uninit_data(struct usb_ep *ep)
{
struct f_qdss *qdss = ep->driver_data;
struct usb_gadget *gadget = qdss->cdev->gadget;
int res = 0;
pr_err("uninit_data\n");
if (gadget_is_dwc3(gadget)) {
res = msm_ep_unconfig(ep);
if (res)
pr_err("msm_ep_unconfig failed\n");
}
return res;
}
/**
* ipa_data_connect_work() - Perform USB IPA BAM connect
* @w: connect work
*
* It is being schedule from ipa_data_connect() API when particular function
* which is using USB IPA accelerated path. This API performs allocating request
* for USB endpoint (tx/rx) for endless purpose, configure USB endpoint to be
* used in accelerated path, connect of USB BAM pipe, IPA BAM pipe and also
* initiate USB IPA BAM pipe handshake for connect sequence.
*/
static void ipa_data_connect_work(struct work_struct *w)
{
struct ipa_data_ch_info *port = container_of(w, struct ipa_data_ch_info,
connect_w);
struct gadget_ipa_port *gport;
struct usb_gadget *gadget = NULL;
u32 sps_params;
int ret;
unsigned long flags;
bool is_ipa_disconnected = true;
pr_debug("%s: Connect workqueue started", __func__);
spin_lock_irqsave(&port->port_lock, flags);
if (!port->port_usb) {
spin_unlock_irqrestore(&port->port_lock, flags);
pr_err("%s(): port_usb is NULL.\n", __func__);
return;
}
gport = port->port_usb;
if (gport && gport->cdev)
gadget = gport->cdev->gadget;
if (!gadget) {
spin_unlock_irqrestore(&port->port_lock, flags);
pr_err("%s: gport is NULL.\n", __func__);
return;
}
gport->ipa_consumer_ep = -1;
gport->ipa_producer_ep = -1;
if (gport->out) {
port->rx_req = usb_ep_alloc_request(gport->out, GFP_ATOMIC);
if (!port->rx_req) {
spin_unlock_irqrestore(&port->port_lock, flags);
pr_err("%s: failed to allocate rx_req\n", __func__);
return;
}
port->rx_req->context = port;
port->rx_req->complete = ipa_data_endless_complete;
port->rx_req->length = 0;
port->rx_req->no_interrupt = 1;
}
if (gport->in) {
port->tx_req = usb_ep_alloc_request(gport->in, GFP_ATOMIC);
if (!port->tx_req) {
spin_unlock_irqrestore(&port->port_lock, flags);
pr_err("%s: failed to allocate tx_req\n", __func__);
goto free_rx_req;
}
port->tx_req->context = port;
port->tx_req->complete = ipa_data_endless_complete;
port->tx_req->length = 0;
port->tx_req->no_interrupt = 1;
}
port->is_connected = true;
spin_unlock_irqrestore(&port->port_lock, flags);
/* update IPA Parameteres here. */
port->ipa_params.usb_connection_speed = gadget->speed;
if (gadget_is_dwc3(gadget))
port->ipa_params.reset_pipe_after_lpm =
msm_dwc3_reset_ep_after_lpm(gadget);
port->ipa_params.skip_ep_cfg = true;
port->ipa_params.keep_ipa_awake = true;
port->ipa_params.cons_clnt_hdl = -1;
port->ipa_params.prod_clnt_hdl = -1;
/*
* Perform below operations for Tx from Device (OUT transfer)
* 1. Connect with pipe of USB BAM with IPA BAM pipe
* 2. Update USB Endpoint related information using SPS Param.
* 3. Configure USB Endpoint/DBM for the same.
* 4. Override USB ep queue functionality for endless transfer.
*/
if (gport->out) {
pr_debug("configure bam ipa connect for USB OUT\n");
port->ipa_params.dir = USB_TO_PEER_PERIPHERAL;
ret = usb_bam_connect_ipa(&port->ipa_params);
if (ret) {
pr_err("usb_bam_connect_ipa out failed err:%d\n", ret);
goto free_rx_tx_req;
}
gadget->bam2bam_func_enabled = true;
gport->ipa_consumer_ep = port->ipa_params.ipa_cons_ep_idx;
if (gadget_is_dwc3(gadget)) {
sps_params = MSM_SPS_MODE | MSM_DISABLE_WB
| MSM_PRODUCER | port->src_pipe_idx;
port->rx_req->length = 32*1024;
} else {
sps_params = (MSM_SPS_MODE | port->src_pipe_idx |
MSM_VENDOR_ID) & ~MSM_IS_FINITE_TRANSFER;
}
port->rx_req->udc_priv = sps_params;
port->src_bam_idx = usb_bam_get_connection_idx(
gadget->name, IPA_P_BAM,
USB_TO_PEER_PERIPHERAL,
USB_BAM_DEVICE, 1);
if (port->src_bam_idx < 0) {
pr_err("src_bam: get_connection_idx failed\n");
goto disconnect_usb_bam_ipa_out;
}
if (gadget_is_dwc3(gadget)) {
configure_fifo(port->src_bam_idx, port->port_usb->out);
ret = msm_ep_config(port->port_usb->out);
if (ret) {
pr_err("msm_ep_config() failed for OUT EP\n");
goto disconnect_usb_bam_ipa_out;
}
}
is_ipa_disconnected = false;
}
if (gport->in) {
pr_debug("configure bam ipa connect for USB IN\n");
port->ipa_params.dir = PEER_PERIPHERAL_TO_USB;
port->ipa_params.dst_client = IPA_CLIENT_USB_DPL_CONS;
ret = usb_bam_connect_ipa(&port->ipa_params);
if (ret) {
pr_err("usb_bam_connect_ipa IN failed err:%d\n", ret);
goto unconfig_msm_ep_out;
}
gadget->bam2bam_func_enabled = true;
gport->ipa_producer_ep = port->ipa_params.ipa_prod_ep_idx;
if (gadget_is_dwc3(gadget)) {
sps_params = MSM_SPS_MODE | MSM_DISABLE_WB |
port->dst_pipe_idx;
port->tx_req->length = 32*1024;
} else {
sps_params = (MSM_SPS_MODE | port->dst_pipe_idx |
MSM_VENDOR_ID) & ~MSM_IS_FINITE_TRANSFER;
}
port->tx_req->udc_priv = sps_params;
port->dst_bam_idx = usb_bam_get_connection_idx(gadget->name,
IPA_P_BAM, PEER_PERIPHERAL_TO_USB,
USB_BAM_DEVICE, 1);
if (port->dst_bam_idx < 0) {
pr_err("dst_bam: get_connection_idx failed\n");
goto disconnect_usb_bam_ipa_in;
}
if (gadget_is_dwc3(gadget)) {
configure_fifo(port->dst_bam_idx, gport->in);
ret = msm_ep_config(gport->in);
if (ret) {
pr_err("msm_ep_config() failed for IN EP\n");
goto disconnect_usb_bam_ipa_in;
}
}
is_ipa_disconnected = false;
}
pr_debug("ipa_producer_ep:%d ipa_consumer_ep:%d\n",
gport->ipa_producer_ep,
gport->ipa_consumer_ep);
gqti_ctrl_update_ipa_pipes(NULL, DPL_QTI_CTRL_PORT_NO,
gport->ipa_producer_ep,
gport->ipa_consumer_ep);
pr_debug("src_bam_idx:%d dst_bam_idx:%d\n",
port->src_bam_idx, port->dst_bam_idx);
if (gport->out)
ipa_data_start_endless_xfer(port, false);
if (gport->in)
ipa_data_start_endless_xfer(port, true);
pr_debug("Connect workqueue done (port %p)", port);
return;
disconnect_usb_bam_ipa_in:
if (!is_ipa_disconnected) {
usb_bam_disconnect_ipa(&port->ipa_params);
is_ipa_disconnected = true;
}
unconfig_msm_ep_out:
if (gport->out)
msm_ep_unconfig(port->port_usb->out);
disconnect_usb_bam_ipa_out:
if (!is_ipa_disconnected) {
usb_bam_disconnect_ipa(&port->ipa_params);
is_ipa_disconnected = true;
}
free_rx_tx_req:
spin_lock_irqsave(&port->port_lock, flags);
port->is_connected = false;
spin_unlock_irqrestore(&port->port_lock, flags);
if (gport->in && port->tx_req)
usb_ep_free_request(gport->in, port->tx_req);
free_rx_req:
if (gport->out && port->rx_req)
usb_ep_free_request(gport->out, port->rx_req);
}
