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authorArtur Petrosyan <Arthur.Petrosyan@synopsys.com>2021-04-08 13:45:01 +0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2021-04-09 15:16:38 +0200
commit139fae7a08381c21026b05732e63c79018bb6c60 (patch)
treecca884a4d1c464188d896ed3588ce28682bbcd41 /drivers/usb/dwc2
parentb77b0d0021ec8f6bbcce659c5e6500e2dbc74e3c (diff)
usb: dwc2: Update port suspend/resume function definitions.
Earlier "dwc2_port_suspend()" and "dwc2_port_resume()" functions were implemented without proper description and host or device mode difference. - Added "dwc2_port_suspend" and "dwc2_port_resume" functions to "core.h" header file. - Updated function description in documentation. Acked-by: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com> Signed-off-by: Artur Petrosyan <Arthur.Petrosyan@synopsys.com> Link: https://lore.kernel.org/r/20210408094502.61D18A0232@mailhost.synopsys.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/dwc2')
-rw-r--r--drivers/usb/dwc2/core.h4
-rw-r--r--drivers/usb/dwc2/hcd.c25
2 files changed, 23 insertions, 6 deletions
diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h
index 39037709a2ad..b7d99cf9e84c 100644
--- a/drivers/usb/dwc2/core.h
+++ b/drivers/usb/dwc2/core.h
@@ -1470,6 +1470,8 @@ void dwc2_hcd_connect(struct dwc2_hsotg *hsotg);
void dwc2_hcd_disconnect(struct dwc2_hsotg *hsotg, bool force);
void dwc2_hcd_start(struct dwc2_hsotg *hsotg);
int dwc2_core_init(struct dwc2_hsotg *hsotg, bool initial_setup);
+void dwc2_port_suspend(struct dwc2_hsotg *hsotg, u16 windex);
+void dwc2_port_resume(struct dwc2_hsotg *hsotg);
int dwc2_backup_host_registers(struct dwc2_hsotg *hsotg);
int dwc2_restore_host_registers(struct dwc2_hsotg *hsotg);
int dwc2_host_enter_hibernation(struct dwc2_hsotg *hsotg);
@@ -1493,6 +1495,8 @@ static inline void dwc2_hcd_start(struct dwc2_hsotg *hsotg) {}
static inline void dwc2_hcd_remove(struct dwc2_hsotg *hsotg) {}
static inline int dwc2_core_init(struct dwc2_hsotg *hsotg, bool initial_setup)
{ return 0; }
+static inline void dwc2_port_suspend(struct dwc2_hsotg *hsotg, u16 windex) {}
+static inline void dwc2_port_resume(struct dwc2_hsotg *hsotg) {}
static inline int dwc2_hcd_init(struct dwc2_hsotg *hsotg)
{ return 0; }
static inline int dwc2_backup_host_registers(struct dwc2_hsotg *hsotg)
diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c
index dd0362e07444..f4247a66c2b2 100644
--- a/drivers/usb/dwc2/hcd.c
+++ b/drivers/usb/dwc2/hcd.c
@@ -56,8 +56,6 @@
#include "core.h"
#include "hcd.h"
-static void dwc2_port_resume(struct dwc2_hsotg *hsotg);
-
/*
* =========================================================================
* Host Core Layer Functions
@@ -3277,8 +3275,16 @@ static int dwc2_host_is_b_hnp_enabled(struct dwc2_hsotg *hsotg)
return hcd->self.b_hnp_enable;
}
-/* Must NOT be called with interrupt disabled or spinlock held */
-static void dwc2_port_suspend(struct dwc2_hsotg *hsotg, u16 windex)
+/**
+ * dwc2_port_suspend() - Put controller in suspend mode for host.
+ *
+ * @hsotg: Programming view of the DWC_otg controller
+ * @windex: The control request wIndex field
+ *
+ * This function is for entering Host mode suspend.
+ * Must NOT be called with interrupt disabled or spinlock held.
+ */
+void dwc2_port_suspend(struct dwc2_hsotg *hsotg, u16 windex)
{
unsigned long flags;
u32 hprt0;
@@ -3328,8 +3334,15 @@ static void dwc2_port_suspend(struct dwc2_hsotg *hsotg, u16 windex)
}
}
-/* Must NOT be called with interrupt disabled or spinlock held */
-static void dwc2_port_resume(struct dwc2_hsotg *hsotg)
+/**
+ * dwc2_port_resume() - Exit controller from suspend mode for host.
+ *
+ * @hsotg: Programming view of the DWC_otg controller
+ *
+ * This function is for exiting Host mode suspend.
+ * Must NOT be called with interrupt disabled or spinlock held.
+ */
+void dwc2_port_resume(struct dwc2_hsotg *hsotg)
{
unsigned long flags;
u32 hprt0;