RE: [RESEND PATCH v2] usb/gadget: make composite gadget meet usb compliance for vbus draw

2015-08-31 Thread Du, Changbin 
I am sorry, I forget to remove them. It is generated by git and I send the 
patch with outlook.
I will use git-send-email instead next time if my email account work.

Regards
Du, Changbin

> -Original Message-
> From: 'Greg Kroah-Hartman' [mailto:gre...@linuxfoundation.org]
> Sent: Monday, August 31, 2015 10:01 PM
> To: Du, Changbin
> Cc: 'Felipe Balbi'; 'Andrzej Pietrasiewicz'; 'linux-...@vger.kernel.org'; 
> 'linux-
> ker...@vger.kernel.org'
> Subject: Re: [RESEND PATCH v2] usb/gadget: make composite gadget meet
> usb compliance for vbus draw
> 
> On Mon, Aug 31, 2015 at 04:51:22AM +, Du, Changbin wrote:
> > >From 08df419517694c4dd9ff328f5644b46a99c2999e Mon Sep 17 00:00:00
> 2001
> > From: "Du, Changbin" 
> > Date: Thu, 23 Jul 2015 20:08:04 +0800
> > Subject: [PATCH v2] usb/gadget: make composite gadget meet usb
> compliance for
> >  vbus draw
> 
> What is this mess here for?

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Re: [RESEND PATCH v2] usb/gadget: make composite gadget meet usb compliance for vbus draw

2015-08-31 Thread 'Greg Kroah-Hartman' 
On Mon, Aug 31, 2015 at 04:51:22AM +, Du, Changbin wrote:
> >From 08df419517694c4dd9ff328f5644b46a99c2999e Mon Sep 17 00:00:00 2001
> From: "Du, Changbin" 
> Date: Thu, 23 Jul 2015 20:08:04 +0800
> Subject: [PATCH v2] usb/gadget: make composite gadget meet usb compliance for
>  vbus draw

What is this mess here for?

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RE: [RESEND PATCH v2] usb/gadget: make composite gadget meet usb compliance for vbus draw

2015-08-31 Thread Du, Changbin 
I am sorry, I forget to remove them. It is generated by git and I send the 
patch with outlook.
I will use git-send-email instead next time if my email account work.

Regards
Du, Changbin

> -Original Message-
> From: 'Greg Kroah-Hartman' [mailto:gre...@linuxfoundation.org]
> Sent: Monday, August 31, 2015 10:01 PM
> To: Du, Changbin
> Cc: 'Felipe Balbi'; 'Andrzej Pietrasiewicz'; 'linux-...@vger.kernel.org'; 
> 'linux-
> ker...@vger.kernel.org'
> Subject: Re: [RESEND PATCH v2] usb/gadget: make composite gadget meet
> usb compliance for vbus draw
> 
> On Mon, Aug 31, 2015 at 04:51:22AM +, Du, Changbin wrote:
> > >From 08df419517694c4dd9ff328f5644b46a99c2999e Mon Sep 17 00:00:00
> 2001
> > From: "Du, Changbin" <changbin...@intel.com>
> > Date: Thu, 23 Jul 2015 20:08:04 +0800
> > Subject: [PATCH v2] usb/gadget: make composite gadget meet usb
> compliance for
> >  vbus draw
> 
> What is this mess here for?

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Please read the FAQ at  http://www.tux.org/lkml/

Re: [RESEND PATCH v2] usb/gadget: make composite gadget meet usb compliance for vbus draw

2015-08-31 Thread 'Greg Kroah-Hartman' 
On Mon, Aug 31, 2015 at 04:51:22AM +, Du, Changbin wrote:
> >From 08df419517694c4dd9ff328f5644b46a99c2999e Mon Sep 17 00:00:00 2001
> From: "Du, Changbin" 
> Date: Thu, 23 Jul 2015 20:08:04 +0800
> Subject: [PATCH v2] usb/gadget: make composite gadget meet usb compliance for
>  vbus draw

What is this mess here for?

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the body of a message to majord...@vger.kernel.org
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Please read the FAQ at  http://www.tux.org/lkml/

[RESEND PATCH v2] usb/gadget: make composite gadget meet usb compliance for vbus draw

2015-08-30 Thread Du, Changbin 
>From 08df419517694c4dd9ff328f5644b46a99c2999e Mon Sep 17 00:00:00 2001
From: "Du, Changbin" 
Date: Thu, 23 Jul 2015 20:08:04 +0800
Subject: [PATCH v2] usb/gadget: make composite gadget meet usb compliance for
 vbus draw

USB-IF compliance requirement limits the vbus current according to
current state. USB2 Spec requires that un-configured current must
be <= 100mA, for USB3 is 150mA, OTG is 2.5mA. So set corresponding
vbus draw current according to device mode.

Signed-off-by: Du, Changbin 
---
Resend patch since no response for 4 weeks, probably bee missed.
Changes from v1:
Also update configfs to use new api composite_reset.

---
 drivers/usb/gadget/composite.c | 39 ---
 drivers/usb/gadget/configfs.c  |  2 +-
 include/linux/usb/composite.h  |  1 +
 include/uapi/linux/usb/ch9.h   |  9 +
 4 files changed, 43 insertions(+), 8 deletions(-)

diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index 4e3447b..b3896e9 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -610,6 +610,21 @@ static void device_qual(struct usb_composite_dev *cdev)
qual->bRESERVED = 0;
 }
 
+static unsigned unconfigured_vbus_draw(struct usb_composite_dev *cdev)
+{
+   struct usb_gadget *g = cdev->gadget;
+   unsigned power;
+
+   if (gadget_is_otg(g))
+   power = USB_OTG_UNCONF_STATE_VBUS_MAX_DRAW;
+   else if (g->speed == USB_SPEED_SUPER)
+   power = USB3_UNCONF_STATE_VBUS_MAX_DRAW;
+   else
+   power = USB2_UNCONF_STATE_VBUS_MAX_DRAW;
+
+   return power;
+}
+
 /*-*/
 
 static void reset_config(struct usb_composite_dev *cdev)
@@ -634,7 +649,7 @@ static int set_config(struct usb_composite_dev *cdev,
struct usb_gadget   *gadget = cdev->gadget;
struct usb_configuration *c = NULL;
int result = -EINVAL;
-   unsignedpower = gadget_is_otg(gadget) ? 8 : 100;
+   unsignedpower = unconfigured_vbus_draw(cdev);
int tmp;
 
if (number) {
@@ -1829,6 +1844,15 @@ done:
return value;
 }
 
+void composite_reset(struct usb_gadget *gadget)
+{
+   struct usb_composite_dev *cdev = get_gadget_data(gadget);
+
+   DBG(cdev, "reset\n");
+   usb_gadget_vbus_draw(gadget, unconfigured_vbus_draw(cdev));
+   composite_disconnect(gadget);
+}
+
 void composite_disconnect(struct usb_gadget *gadget)
 {
struct usb_composite_dev*cdev = get_gadget_data(gadget);
@@ -2095,7 +2119,7 @@ void composite_suspend(struct usb_gadget *gadget)
 
cdev->suspended = 1;
 
-   usb_gadget_vbus_draw(gadget, 2);
+   usb_gadget_vbus_draw(gadget, USB_SUSPEND_STATE_VBUS_MAX_DRAW);
 }
 
 void composite_resume(struct usb_gadget *gadget)
@@ -2117,10 +2141,11 @@ void composite_resume(struct usb_gadget *gadget)
}
 
maxpower = cdev->config->MaxPower;
-
-   usb_gadget_vbus_draw(gadget, maxpower ?
-   maxpower : CONFIG_USB_GADGET_VBUS_DRAW);
-   }
+   if (!maxpower)
+   maxpower = CONFIG_USB_GADGET_VBUS_DRAW;
+   } else
+   maxpower = unconfigured_vbus_draw(cdev);
+   usb_gadget_vbus_draw(gadget, maxpower);
 
cdev->suspended = 0;
 }
@@ -2132,7 +2157,7 @@ static const struct usb_gadget_driver 
composite_driver_template = {
.unbind = composite_unbind,
 
.setup  = composite_setup,
-   .reset  = composite_disconnect,
+   .reset  = composite_reset,
.disconnect = composite_disconnect,
 
.suspend= composite_suspend,
diff --git a/drivers/usb/gadget/configfs.c b/drivers/usb/gadget/configfs.c
index 0495c94..e16335d 100644
--- a/drivers/usb/gadget/configfs.c
+++ b/drivers/usb/gadget/configfs.c
@@ -1449,7 +1449,7 @@ static const struct usb_gadget_driver 
configfs_driver_template = {
.unbind = configfs_composite_unbind,
 
.setup  = composite_setup,
-   .reset  = composite_disconnect,
+   .reset  = composite_reset,
.disconnect = composite_disconnect,
 
.suspend= composite_suspend,
diff --git a/include/linux/usb/composite.h b/include/linux/usb/composite.h
index 2511469..825ad39 100644
--- a/include/linux/usb/composite.h
+++ b/include/linux/usb/composite.h
@@ -506,6 +506,7 @@ extern struct usb_string *usb_gstrings_attach(struct 
usb_composite_dev *cdev,
 
 extern int usb_string_ids_n(struct usb_composite_dev *c, unsigned n);
 
+extern void composite_reset(struct usb_gadget *gadget);
 extern void composite_disconnect(struct usb_gadget *gadget);
 extern int composite_setup(struct usb_gadget *gadget,
const struct usb_ctrlrequest *ctrl);
diff --git a/include/uapi/linux/usb/ch9.h

[RESEND PATCH v2] usb/gadget: make composite gadget meet usb compliance for vbus draw

2015-08-30 Thread Du, Changbin 
From 08df419517694c4dd9ff328f5644b46a99c2999e Mon Sep 17 00:00:00 2001
From: Du, Changbin changbin...@intel.com
Date: Thu, 23 Jul 2015 20:08:04 +0800
Subject: [PATCH v2] usb/gadget: make composite gadget meet usb compliance for
 vbus draw

USB-IF compliance requirement limits the vbus current according to
current state. USB2 Spec requires that un-configured current must
be = 100mA, for USB3 is 150mA, OTG is 2.5mA. So set corresponding
vbus draw current according to device mode.

Signed-off-by: Du, Changbin changbin...@intel.com
---
Resend patch since no response for 4 weeks, probably bee missed.
Changes from v1:
Also update configfs to use new api composite_reset.

---
 drivers/usb/gadget/composite.c | 39 ---
 drivers/usb/gadget/configfs.c  |  2 +-
 include/linux/usb/composite.h  |  1 +
 include/uapi/linux/usb/ch9.h   |  9 +
 4 files changed, 43 insertions(+), 8 deletions(-)

diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index 4e3447b..b3896e9 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -610,6 +610,21 @@ static void device_qual(struct usb_composite_dev *cdev)
qual-bRESERVED = 0;
 }
 
+static unsigned unconfigured_vbus_draw(struct usb_composite_dev *cdev)
+{
+   struct usb_gadget *g = cdev-gadget;
+   unsigned power;
+
+   if (gadget_is_otg(g))
+   power = USB_OTG_UNCONF_STATE_VBUS_MAX_DRAW;
+   else if (g-speed == USB_SPEED_SUPER)
+   power = USB3_UNCONF_STATE_VBUS_MAX_DRAW;
+   else
+   power = USB2_UNCONF_STATE_VBUS_MAX_DRAW;
+
+   return power;
+}
+
 /*-*/
 
 static void reset_config(struct usb_composite_dev *cdev)
@@ -634,7 +649,7 @@ static int set_config(struct usb_composite_dev *cdev,
struct usb_gadget   *gadget = cdev-gadget;
struct usb_configuration *c = NULL;
int result = -EINVAL;
-   unsignedpower = gadget_is_otg(gadget) ? 8 : 100;
+   unsignedpower = unconfigured_vbus_draw(cdev);
int tmp;
 
if (number) {
@@ -1829,6 +1844,15 @@ done:
return value;
 }
 
+void composite_reset(struct usb_gadget *gadget)
+{
+   struct usb_composite_dev *cdev = get_gadget_data(gadget);
+
+   DBG(cdev, reset\n);
+   usb_gadget_vbus_draw(gadget, unconfigured_vbus_draw(cdev));
+   composite_disconnect(gadget);
+}
+
 void composite_disconnect(struct usb_gadget *gadget)
 {
struct usb_composite_dev*cdev = get_gadget_data(gadget);
@@ -2095,7 +2119,7 @@ void composite_suspend(struct usb_gadget *gadget)
 
cdev-suspended = 1;
 
-   usb_gadget_vbus_draw(gadget, 2);
+   usb_gadget_vbus_draw(gadget, USB_SUSPEND_STATE_VBUS_MAX_DRAW);
 }
 
 void composite_resume(struct usb_gadget *gadget)
@@ -2117,10 +2141,11 @@ void composite_resume(struct usb_gadget *gadget)
}
 
maxpower = cdev-config-MaxPower;
-
-   usb_gadget_vbus_draw(gadget, maxpower ?
-   maxpower : CONFIG_USB_GADGET_VBUS_DRAW);
-   }
+   if (!maxpower)
+   maxpower = CONFIG_USB_GADGET_VBUS_DRAW;
+   } else
+   maxpower = unconfigured_vbus_draw(cdev);
+   usb_gadget_vbus_draw(gadget, maxpower);
 
cdev-suspended = 0;
 }
@@ -2132,7 +2157,7 @@ static const struct usb_gadget_driver 
composite_driver_template = {
.unbind = composite_unbind,
 
.setup  = composite_setup,
-   .reset  = composite_disconnect,
+   .reset  = composite_reset,
.disconnect = composite_disconnect,
 
.suspend= composite_suspend,
diff --git a/drivers/usb/gadget/configfs.c b/drivers/usb/gadget/configfs.c
index 0495c94..e16335d 100644
--- a/drivers/usb/gadget/configfs.c
+++ b/drivers/usb/gadget/configfs.c
@@ -1449,7 +1449,7 @@ static const struct usb_gadget_driver 
configfs_driver_template = {
.unbind = configfs_composite_unbind,
 
.setup  = composite_setup,
-   .reset  = composite_disconnect,
+   .reset  = composite_reset,
.disconnect = composite_disconnect,
 
.suspend= composite_suspend,
diff --git a/include/linux/usb/composite.h b/include/linux/usb/composite.h
index 2511469..825ad39 100644
--- a/include/linux/usb/composite.h
+++ b/include/linux/usb/composite.h
@@ -506,6 +506,7 @@ extern struct usb_string *usb_gstrings_attach(struct 
usb_composite_dev *cdev,
 
 extern int usb_string_ids_n(struct usb_composite_dev *c, unsigned n);
 
+extern void composite_reset(struct usb_gadget *gadget);
 extern void composite_disconnect(struct usb_gadget *gadget);
 extern int composite_setup(struct usb_gadget *gadget,
const struct usb_ctrlrequest *ctrl);
diff --git