1. Add missing definitions in ch9.h for requests tarageted to an
Interface: GET_STATUS & SET_FEATURE(FUNC_SUSPEND).
2. Add func_wakeup api to usb_gadget_ops.
Super-Speed device must provide interface number to the UDC when
it triggers remote wakeup (function wake).
The func_wakeup api is used instead of the wakeup api, when the
gadget is connected in Super-Speed. The wakeup api is left as is,
and it is used when the gadget is connected in High-Speed. Therefore,
no change is required in non Super-Speed UDCs.
Signed-off-by: Amit Blay <ablay@xxxxxxxxxxxxxx>
---
drivers/usb/gadget/udc-core.c | 2 +-
drivers/usb/gadget/zero.c | 6 +++++-
include/linux/usb/ch9.h | 8 ++++++++
include/linux/usb/gadget.h | 35 +++++++++++++++++++++++++++--------
4 files changed, 41 insertions(+), 10 deletions(-)
diff --git a/drivers/usb/gadget/udc-core.c b/drivers/usb/gadget/udc-core.c
index 05ba472..beb7e89 100644
--- a/drivers/usb/gadget/udc-core.c
+++ b/drivers/usb/gadget/udc-core.c
@@ -347,7 +347,7 @@ static ssize_t usb_udc_srp_store(struct device *dev,
struct usb_udc *udc = dev_get_drvdata(dev);
if (sysfs_streq(buf, "1"))
- usb_gadget_wakeup(udc->gadget);
+ usb_gadget_wakeup(udc->gadget, 0);
return n;
}
diff --git a/drivers/usb/gadget/zero.c b/drivers/usb/gadget/zero.c
index 00e2fd2..a5d13c6 100644
--- a/drivers/usb/gadget/zero.c
+++ b/drivers/usb/gadget/zero.c
@@ -239,7 +239,11 @@ static void zero_autoresume(unsigned long _c)
* because of some direct user request.
*/
if (g->speed != USB_SPEED_UNKNOWN) {
- int status = usb_gadget_wakeup(g);
+ /*
+ * The single interface of the current configuration
+ * triggers the wakeup.
+ */
+ int status = usb_gadget_wakeup(g, 1);
INFO(cdev, "%s --> %d\n", __func__, status);
}
}
diff --git a/include/linux/usb/ch9.h b/include/linux/usb/ch9.h
index 0fd3fbd..404c10e 100644
--- a/include/linux/usb/ch9.h
+++ b/include/linux/usb/ch9.h
@@ -142,7 +142,13 @@
#define USB_DEVICE_LTM_ENABLE 50 /* dev may send LTM */
#define USB_INTRF_FUNC_SUSPEND 0 /* function suspend */
+/*
+ * Function Suspend Options as defined by USB 3.0
+ * See USB 3.0 spec Table 9-7
+ */
#define USB_INTR_FUNC_SUSPEND_OPT_MASK 0xFF00
+#define USB_INTR_FUNC_SUSPEND_SUSP 1 /* function suspend option */
+#define USB_INTR_FUNC_SUSPEND_RWAKE_EN 2 /* function wake enabled option */
#define USB_ENDPOINT_HALT 0 /* IN/OUT will STALL */
@@ -150,6 +156,8 @@
#define USB_DEV_STAT_U1_ENABLED 2 /* transition into U1 state */
#define USB_DEV_STAT_U2_ENABLED 3 /* transition into U2 state */
#define USB_DEV_STAT_LTM_ENABLED 4 /* Latency tolerance messages */
+#define USB_INTR_STAT_RWAKE_CAP 0 /* Function wake capable */
+#define USB_INTR_STAT_RWAKE_EN 1 /* Function wake enabled */
/**
* struct usb_ctrlrequest - SETUP data for a USB device control request
diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h
index 087f4b9..3ebbc11 100644
--- a/include/linux/usb/gadget.h
+++ b/include/linux/usb/gadget.h
@@ -458,7 +458,11 @@ struct usb_gadget_ops {
int (*pullup) (struct usb_gadget *, int is_on);
int (*ioctl)(struct usb_gadget *,
unsigned code, unsigned long param);
+
+ /* USB 3.0 additions */
void (*get_config_params)(struct usb_dcd_config_params *);
+ int (*func_wakeup)(struct usb_gadget *, int interface_id);
+
int (*udc_start)(struct usb_gadget *,
struct usb_gadget_driver *);
int (*udc_stop)(struct usb_gadget *,
@@ -607,21 +611,36 @@ static inline int usb_gadget_frame_number(struct usb_gadget *gadget)
/**
* usb_gadget_wakeup - tries to wake up the host connected to this gadget
* @gadget: controller used to wake up the host
+ * @interface_id: id of the first interface of the function that
+ * triggered the wake up
*
* Returns zero on success, else negative error code if the hardware
* doesn't support such attempts, or its support has not been enabled
* by the usb host. Drivers must return device descriptors that report
* their ability to support this, or hosts won't enable it.
+ * For Super-Speed devices only, the gadget should provide the
+ * id of the first interface that triggered the wake up
+ * (function wake). For non Super-Speed devices, the value of
+ * this parameter doesn't matter.
*
- * This may also try to use SRP to wake the host and start enumeration,
- * even if OTG isn't otherwise in use. OTG devices may also start
- * remote wakeup even when hosts don't explicitly enable it.
+ * This may also try to use SRP to wake the host and start
+ * enumeration, even if OTG isn't otherwise in use. OTG devices
+ * may also start remote wakeup even when hosts don't explicitly
+ * enable it.
*/
-static inline int usb_gadget_wakeup(struct usb_gadget *gadget)
+static inline int usb_gadget_wakeup(struct usb_gadget *gadget, int interface_id)
{
- if (!gadget->ops->wakeup)
- return -EOPNOTSUPP;
- return gadget->ops->wakeup(gadget);
+ if (gadget->speed == USB_SPEED_SUPER) {
+ if (!gadget->ops->func_wakeup)
+ return -EOPNOTSUPP;
+
+ return gadget->ops->func_wakeup(gadget, interface_id);
+ } else {
+ if (!gadget->ops->wakeup)
+ return -EOPNOTSUPP;
+
+ return gadget->ops->wakeup(gadget);
+ }
}
/**
--
1.7.3.3
--
Sent by an employee of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.
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