Merge "USB: dwc3-msm: Initialize DBM ep before BAM pipe reset"

drivers/usb/dwc3/dbm.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012-2015, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2012-2016, The Linux Foundation. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 and
@@ -312,9 +312,6 @@ int dbm_ep_config(struct dbm *dbm, u8 usb_ep, u8 bam_pipe, bool producer,
 		return -ENODEV;
 	}
 
-	/* First, reset the dbm endpoint */
-	ep_soft_reset(dbm, dbm_ep, 0);
-
 	/* Set ioc bit for dbm_ep if needed */
 	msm_dbm_write_reg_field(dbm, DBM_DBG_CNFG,
 		DBM_ENABLE_IOC_MASK & 1 << dbm_ep, ioc ? 1 : 0);
@@ -391,23 +388,10 @@ int dbm_ep_unconfig(struct dbm *dbm, u8 usb_ep)
 	data &= (~0x1);
 	msm_dbm_write_ep_reg(dbm, DBM_EP_CFG, dbm_ep, data);
 
-	/* Reset the dbm endpoint */
-	ep_soft_reset(dbm, dbm_ep, true);
 	/*
-	 * The necessary delay between asserting and deasserting the dbm ep
-	 * reset is based on the number of active endpoints. If there is more
-	 * than one endpoint, a 1 msec delay is required. Otherwise, a shorter
-	 * delay will suffice.
-	 *
-	 * As this function can be called in atomic context, sleeping variants
-	 * for delay are not possible - albeit a 1ms delay.
+	 * ep_soft_reset is not required during disconnect as pipe reset on
+	 * next connect will take care of the same.
 	 */
-	if (dbm_get_num_of_eps_configured(dbm) > 1)
-		udelay(1000);
-	else
-		udelay(10);
-	ep_soft_reset(dbm, dbm_ep, false);
-
 	return 0;
 }
 

drivers/usb/dwc3/dwc3-msm.c

@@ -624,11 +624,6 @@ static int dwc3_msm_ep_queue(struct usb_ep *ep,
 	struct dwc3_msm_req_complete *req_complete;
 	unsigned long flags;
 	int ret = 0, size;
-	u8 bam_pipe;
-	bool producer;
-	bool disable_wb;
-	bool internal_mem;
-	bool ioc;
 	bool superspeed;
 
 	if (!(request->udc_priv & MSM_SPS_MODE)) {
@@ -661,23 +656,6 @@ static int dwc3_msm_ep_queue(struct usb_ep *ep,
 	list_add_tail(&req_complete->list_item, &mdwc->req_complete_list);
 	request->complete = dwc3_msm_req_complete_func;
 
-	/*
-	 * Configure the DBM endpoint
-	 */
-	bam_pipe = request->udc_priv & MSM_PIPE_ID_MASK;
-	producer = ((request->udc_priv & MSM_PRODUCER) ? true : false);
-	disable_wb = ((request->udc_priv & MSM_DISABLE_WB) ? true : false);
-	internal_mem = ((request->udc_priv & MSM_INTERNAL_MEM) ? true : false);
-	ioc = ((request->udc_priv & MSM_ETD_IOC) ? true : false);
-
-	ret = dbm_ep_config(mdwc->dbm, dep->number, bam_pipe, producer,
-				disable_wb, internal_mem, ioc);
-	if (ret < 0) {
-		dev_err(mdwc->dev,
-			"error %d after calling dbm_ep_config\n", ret);
-		return ret;
-	}
-
 	dev_vdbg(dwc->dev, "%s: queing request %p to ep %s length %d\n",
 			__func__, request, ep->name, request->length);
 	size = dwc3_msm_read_reg(mdwc->base, DWC3_GEVNTSIZ(0));
@@ -1348,12 +1326,19 @@ static int dwc3_msm_gsi_ep_op(struct usb_ep *ep,
  *
  * @return int - 0 on success, negetive on error.
  */
-int msm_ep_config(struct usb_ep *ep)
+int msm_ep_config(struct usb_ep *ep, struct usb_request *request,
+							gfp_t gfp_flags)
 {
 	struct dwc3_ep *dep = to_dwc3_ep(ep);
 	struct dwc3 *dwc = dep->dwc;
 	struct dwc3_msm *mdwc = dev_get_drvdata(dwc->dev->parent);
 	struct usb_ep_ops *new_ep_ops;
+	int ret = 0;
+	u8 bam_pipe;
+	bool producer;
+	bool disable_wb;
+	bool internal_mem;
+	bool ioc;
 
 
 	/* Save original ep ops for future restore*/
@@ -1366,7 +1351,7 @@ int msm_ep_config(struct usb_ep *ep)
 	mdwc->original_ep_ops[dep->number] = ep->ops;
 
 	/* Set new usb ops as we like */
-	new_ep_ops = kzalloc(sizeof(struct usb_ep_ops), GFP_ATOMIC);
+	new_ep_ops = kzalloc(sizeof(struct usb_ep_ops), gfp_flags);
 	if (!new_ep_ops) {
 		dev_err(mdwc->dev,
 			"%s: unable to allocate mem for new usb ep ops\n",
@@ -1378,10 +1363,25 @@ int msm_ep_config(struct usb_ep *ep)
 	new_ep_ops->gsi_ep_op = dwc3_msm_gsi_ep_op;
 	ep->ops = new_ep_ops;
 
+	if (!mdwc->dbm || !request || (dep->endpoint.ep_type == EP_TYPE_GSI))
+		return 0;
+
 	/*
-	 * Do HERE more usb endpoint configurations
-	 * which are specific to MSM.
+	 * Configure the DBM endpoint if required.
 	 */
+	bam_pipe = request->udc_priv & MSM_PIPE_ID_MASK;
+	producer = ((request->udc_priv & MSM_PRODUCER) ? true : false);
+	disable_wb = ((request->udc_priv & MSM_DISABLE_WB) ? true : false);
+	internal_mem = ((request->udc_priv & MSM_INTERNAL_MEM) ? true : false);
+	ioc = ((request->udc_priv & MSM_ETD_IOC) ? true : false);
+
+	ret = dbm_ep_config(mdwc->dbm, dep->number, bam_pipe, producer,
+					disable_wb, internal_mem, ioc);
+	if (ret < 0) {
+		dev_err(mdwc->dev,
+			"error %d after calling dbm_ep_config\n", ret);
+		return ret;
+	}
 
 	return 0;
 }

drivers/usb/gadget/function/f_gsi.c

@@ -2245,7 +2245,7 @@ skip_string_id_alloc:
 		if (!ep)
 			goto fail;
 		gsi->d_port.in_ep = ep;
-		msm_ep_config(gsi->d_port.in_ep);
+		msm_ep_config(gsi->d_port.in_ep, NULL, GFP_KERNEL);
 		ep->driver_data = cdev;	/* claim */
 	}
 
@@ -2255,7 +2255,7 @@ skip_string_id_alloc:
 		if (!ep)
 			goto fail;
 		gsi->d_port.out_ep = ep;
-		msm_ep_config(gsi->d_port.out_ep);
+		msm_ep_config(gsi->d_port.out_ep, NULL, GFP_KERNEL);
 		ep->driver_data = cdev;	/* claim */
 	}
 

drivers/usb/gadget/function/u_data_ipa.c

@@ -457,7 +457,7 @@ static void ipa_data_connect_work(struct work_struct *w)
 		configure_fifo(port->usb_bam_type,
 				port->src_connection_idx,
 				port->port_usb->out);
-		ret = msm_ep_config(gport->out);
+		ret = msm_ep_config(gport->out, port->rx_req, GFP_ATOMIC);
 		if (ret) {
 			pr_err("msm_ep_config() failed for OUT EP\n");
 			usb_bam_free_fifos(port->usb_bam_type,
@@ -475,7 +475,7 @@ static void ipa_data_connect_work(struct work_struct *w)
 		port->tx_req->udc_priv = sps_params;
 		configure_fifo(port->usb_bam_type,
 				port->dst_connection_idx, gport->in);
-		ret = msm_ep_config(gport->in);
+		ret = msm_ep_config(gport->in, port->tx_req, GFP_ATOMIC);
 		if (ret) {
 			pr_err("msm_ep_config() failed for IN EP\n");
 			goto unconfig_msm_ep_out;

drivers/usb/gadget/function/u_qdss.c

@@ -94,11 +94,12 @@ int set_qdss_data_connection(struct usb_gadget *gadget,
 
 static int init_data(struct usb_ep *ep)
 {
+	struct f_qdss *qdss = ep->driver_data;
 	int res = 0;
 
 	pr_debug("init_data\n");
 
-	res = msm_ep_config(ep);
+	res = msm_ep_config(ep, qdss->endless_req, GFP_ATOMIC);
 	if (res)
 		pr_err("msm_ep_config failed\n");
 

include/linux/usb/msm_hsusb.h

@@ -296,7 +296,8 @@ static inline void msm_usb_irq_disable(bool disable)
 #endif
 
 #ifdef CONFIG_USB_DWC3_QCOM
-int msm_ep_config(struct usb_ep *ep);
+int msm_ep_config(struct usb_ep *ep, struct usb_request *request,
+							gfp_t gfp_flags);
 int msm_ep_unconfig(struct usb_ep *ep);
 void dwc3_tx_fifo_resize_request(struct usb_ep *ep, bool qdss_enable);
 int msm_data_fifo_config(struct usb_ep *ep, phys_addr_t addr, u32 size,
@@ -311,7 +312,8 @@ static inline int msm_data_fifo_config(struct usb_ep *ep, phys_addr_t addr,
 	return -ENODEV;
 }
 
-static inline int msm_ep_config(struct usb_ep *ep)
+static inline int msm_ep_config(struct usb_ep *ep, struct usb_request *request,
+							gfp_t gfp_flags)
 {
 	return -ENODEV;
 }