linux-kernel - [PATCHv7 4/8] usb: dwc2: Initialize the USB core for peripheral mode

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Date:	Tue, 11 Nov 2014 11:13:36 -0600
From:	<dinguyen@...nsource.altera.com>
To:	<paulz@...opsys.com>, <balbi@...com>
CC:	<dinh.linux@...il.com>, <swarren@...dotorg.org>,
	<b.zolnierkie@...sung.com>, <matthijs@...in.nl>,
	<r.baldyga@...sung.com>, <jg1.han@...sung.com>,
	<sachin.kamat@...aro.org>, <ben-linux@...ff.org>,
	<dianders@...omium.org>, <kever.yang@...k-chips.com>,
	<linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	Dinh Nguyen <dinguyen@...nsource.altera.com>
Subject: [PATCHv7 4/8] usb: dwc2: Initialize the USB core for peripheral mode

From: Dinh Nguyen <dinguyen@...nsource.altera.com>

Initialize the USB driver to peripheral mode when a B-Device connector
is attached.

Signed-off-by: Dinh Nguyen <dinguyen@...nsource.altera.com>
Acked-by: Paul Zimmerman <paulz@...opsys.com>
---
v7: s3c_hsotg_core_init became s3c_hsotg_core_init_disconnected
v5: move the export of s3c_hsotg_core_init into this patch
---
 drivers/usb/dwc2/core.h   | 4 ++++
 drivers/usb/dwc2/gadget.c | 4 ++--
 drivers/usb/dwc2/hcd.c    | 2 ++
 3 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h
index 4905d88..4710935 100644
--- a/drivers/usb/dwc2/core.h
+++ b/drivers/usb/dwc2/core.h
@@ -966,6 +966,8 @@ extern int s3c_hsotg_remove(struct dwc2_hsotg *hsotg);
 extern int s3c_hsotg_suspend(struct dwc2_hsotg *dwc2);
 extern int s3c_hsotg_resume(struct dwc2_hsotg *dwc2);
 extern int dwc2_gadget_init(struct dwc2_hsotg *hsotg, int irq);
+extern void s3c_hsotg_core_init_disconnected(struct dwc2_hsotg *dwc2);
+extern void s3c_hsotg_core_connect(struct dwc2_hsotg *hsotg);
 #else
 static inline int s3c_hsotg_remove(struct dwc2_hsotg *dwc2)
 { return 0; }
@@ -975,6 +977,8 @@ static inline int s3c_hsotg_resume(struct dwc2_hsotg *dwc2)
 { return 0; }
 static inline int dwc2_gadget_init(struct dwc2_hsotg *hsotg, int irq)
 { return 0; }
+static inline void s3c_hsotg_core_init_disconnected(struct dwc2_hsotg *dwc2) {}
+static inline void s3c_hsotg_core_connect(struct dwc2_hsotg *hsotg) {}
 #endif
 
 #if IS_ENABLED(CONFIG_USB_DWC2_HOST) || IS_ENABLED(CONFIG_USB_DWC2_DUAL_ROLE)
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index 9caea51..ec85340 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -2125,7 +2125,7 @@ static int s3c_hsotg_corereset(struct dwc2_hsotg *hsotg)
  *
  * Issue a soft reset to the core, and await the core finishing it.
  */
-static void s3c_hsotg_core_init_disconnected(struct dwc2_hsotg *hsotg)
+void s3c_hsotg_core_init_disconnected(struct dwc2_hsotg *hsotg)
 {
 	s3c_hsotg_corereset(hsotg);
 
@@ -2257,7 +2257,7 @@ static void s3c_hsotg_core_disconnect(struct dwc2_hsotg *hsotg)
 	__orr32(hsotg->regs + DCTL, DCTL_SFTDISCON);
 }
 
-static void s3c_hsotg_core_connect(struct dwc2_hsotg *hsotg)
+void s3c_hsotg_core_connect(struct dwc2_hsotg *hsotg)
 {
 	/* remove the soft-disconnect and let's go */
 	__bic32(hsotg->regs + DCTL, DCTL_SFTDISCON);
diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c
index 4a3cce0..fa60f4a 100644
--- a/drivers/usb/dwc2/hcd.c
+++ b/drivers/usb/dwc2/hcd.c
@@ -1371,6 +1371,8 @@ static void dwc2_conn_id_status_change(struct work_struct *work)
 		hsotg->op_state = OTG_STATE_B_PERIPHERAL;
 		dwc2_core_init(hsotg, false, -1);
 		dwc2_enable_global_interrupts(hsotg);
+		s3c_hsotg_core_init_disconnected(hsotg);
+		s3c_hsotg_core_connect(hsotg);
 	} else {
 		/* A-Device connector (Host Mode) */
 		dev_dbg(hsotg->dev, "connId A\n");
-- 
2.0.3

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