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Commit 76b35fa8 authored by Chandana Kishori Chiluveru's avatar Chandana Kishori Chiluveru
Browse files

usb: f_gsi: Report Function Remote Wake capabilities 



Add support for sending Function Wake capabilities in
response to GET_STATUS from the host. GET_STATUS addressed
to an Interface allows the device to report if it is capable
of doing a Function Remote Wake. Windows8/10 MBIM hosts request
this information before enabling Suspend in SS mode.

Change-Id: Ic0a6db57b2b46804a82847de511feb433a3dfca6
Signed-off-by: default avatarDevdutt Patnaik <dpatnaik@codeaurora.org>
Signed-off-by: default avatarChandana Kishori Chiluveru <cchiluve@codeaurora.org>
parent 3f60b750

drivers/usb/dwc3/ep0.c

+9 −1
Original line number Diff line number Diff line
@@ -43,6 +43,8 @@ MODULE_PARM_DESC(enable_dwc3_u1u2, "Enable support for U1U2 low power modes"); 
static void __dwc3_ep0_do_control_status(struct dwc3 *dwc, struct dwc3_ep *dep);

static void __dwc3_ep0_do_control_data(struct dwc3 *dwc,

		struct dwc3_ep *dep, struct dwc3_request *req);

static int dwc3_ep0_delegate_req(struct dwc3 *dwc,

		struct usb_ctrlrequest *ctrl);



static void dwc3_ep0_prepare_one_trb(struct dwc3_ep *dep,

		dma_addr_t buf_dma, u32 len, u32 type, bool chain)
@@ -332,12 +334,14 @@ static struct dwc3_ep *dwc3_wIndex_to_dep(struct dwc3 *dwc, __le16 wIndex_le) 
static void dwc3_ep0_status_cmpl(struct usb_ep *ep, struct usb_request *req)

{

}



/*

 * ch 9.4.5

 */

static int dwc3_ep0_handle_status(struct dwc3 *dwc,

		struct usb_ctrlrequest *ctrl)

{

	int ret;

	struct dwc3_ep		*dep;

	u32			recip;

	u32			value;
@@ -377,7 +381,8 @@ static int dwc3_ep0_handle_status(struct dwc3 *dwc, 
		 * Function Remote Wake Capable	D0

		 * Function Remote Wakeup	D1

		 */

		break;

		ret = dwc3_ep0_delegate_req(dwc, ctrl);

		return ret;



	case USB_RECIP_ENDPOINT:

		dep = dwc3_wIndex_to_dep(dwc, ctrl->wIndex);
@@ -538,6 +543,9 @@ static int dwc3_ep0_handle_intf(struct dwc3 *dwc, 
		 * For now, we're not doing anything, just making sure we return

		 * 0 so USB Command Verifier tests pass without any errors.

		 */

		ret = dwc3_ep0_delegate_req(dwc, ctrl);

		if (ret)

			return ret;

		break;

	default:

		ret = -EINVAL;

drivers/usb/gadget/function/f_gsi.c

+9 −0
Original line number Diff line number Diff line
@@ -2342,6 +2342,14 @@ static void gsi_resume(struct usb_function *f) 
	log_event_dbg("%s: completed", __func__);

}



static int gsi_get_status(struct usb_function *f)

{

	unsigned int remote_wakeup_en_status = f->func_wakeup_allowed ? 1 : 0;



	return (remote_wakeup_en_status << FUNC_WAKEUP_ENABLE_SHIFT) |

		(1 << FUNC_WAKEUP_CAPABLE_SHIFT);

}



static int gsi_func_suspend(struct usb_function *f, u8 options)

{

	bool func_wakeup_allowed;
@@ -3002,6 +3010,7 @@ static int gsi_bind_config(struct f_gsi *gsi) 
	gsi->function.disable = gsi_disable;

	gsi->function.free_func = gsi_free_func;

	gsi->function.suspend = gsi_suspend;

	gsi->function.get_status = gsi_get_status;

	gsi->function.func_suspend = gsi_func_suspend;

	gsi->function.resume = gsi_resume;

include/linux/usb/composite.h

+3 −0
Original line number Diff line number Diff line
@@ -45,6 +45,9 @@ 
#define FUNC_SUSPEND_OPT_SUSP_MASK BIT(0)

#define FUNC_SUSPEND_OPT_RW_EN_MASK BIT(1)



#define FUNC_WAKEUP_CAPABLE_SHIFT  0

#define FUNC_WAKEUP_ENABLE_SHIFT   1



/*

 * USB function drivers should return USB_GADGET_DELAYED_STATUS if they

 * wish to delay the data/status stages of the control transfer till they