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Subject[PATCH/RFC 2/5] usb:dummy_hcd: connect/disconnect test support
Date
This implementation adds a new proprietary device control requests (to be
handled by the dummy_hcd) that initiates a connect/disconnect sequence.
The bRequest value of the new control request is 0x52.
It is used by the user-space Unit testing application.

Signed-off-by: Tatyana Linder <tlinder@codeaurora.org>

---
drivers/usb/gadget/dummy_hcd.c | 48 ++++++++++++++++++++++++++++++++++++++++
1 files changed, 48 insertions(+), 0 deletions(-)

diff --git a/drivers/usb/gadget/dummy_hcd.c b/drivers/usb/gadget/dummy_hcd.c
index 74b7655..7d0a6fe 100644
--- a/drivers/usb/gadget/dummy_hcd.c
+++ b/drivers/usb/gadget/dummy_hcd.c
@@ -179,6 +179,7 @@ struct dummy_hcd {
unsigned active:1;
unsigned old_active:1;
unsigned resuming:1;
+ struct work_struct conn_disc_work;
};

struct dummy {
@@ -1362,6 +1363,43 @@ static struct dummy_ep *find_endpoint (struct dummy *dum, u8 address)
#define Ep_Request (USB_TYPE_STANDARD | USB_RECIP_ENDPOINT)
#define Ep_InRequest (Ep_Request | USB_DIR_IN)

+/**
+ * dummy_hcd_conn_disc_work() - performs a disconnect/connect sequence.
+ * @data: pointer to the sceduled work_struct
+ */
+static void dummy_hcd_conn_disc_work(struct work_struct *data)
+{
+ struct dummy_hcd *dum_hcd =
+ container_of(data, struct dummy_hcd, conn_disc_work);
+ int ret_val;
+
+ if (!dum_hcd->dum->driver) {
+ dev_err(dummy_dev(dum_hcd),
+ "dummy_hcd_conn_disc_work called without connected "
+ "device\n");
+ return;
+ }
+
+ dev_info(dummy_dev(dum_hcd), "disconnecting device...\n");
+ ret_val = dummy_pullup(&dum_hcd->dum->gadget, 0);
+ if (ret_val) {
+ dev_err(dummy_dev(dum_hcd), "dummy_hcd_conn_disc_work:"
+ " couldn't disconnect device:"
+ " ret_val=%d\n",
+ ret_val);
+ return;
+ }
+
+ dev_info(dummy_dev(dum_hcd), "re-connecting device...\n");
+ /* We have to let the hub task to update the device disconnect state */
+ msleep_interruptible(1000);
+ ret_val = dummy_pullup(&dum_hcd->dum->gadget, 1);
+ if (ret_val)
+ dev_err(dummy_dev(dum_hcd), "dummy_hcd_conn_disc_work:"
+ " couldn't re-connect device:"
+ " ret_val=%d\n",
+ ret_val);
+}

/**
* handle_control_request() - handles all control transfers
@@ -1534,6 +1572,10 @@ static int handle_control_request(struct dummy_hcd *dum_hcd, struct urb *urb,
*status = 0;
}
break;
+ case 0x52: /* UT: Connect/disconnect the device */
+ schedule_work(&dum_hcd->conn_disc_work);
+ ret_val = 0;
+ break;
}
return ret_val;
}
@@ -2249,6 +2291,8 @@ static int dummy_setup(struct usb_hcd *hcd)
if (usb_hcd_is_primary_hcd(hcd)) {
the_controller.hs_hcd = hcd_to_dummy_hcd(hcd);
the_controller.hs_hcd->dum = &the_controller;
+ INIT_WORK(&the_controller.hs_hcd->conn_disc_work,
+ dummy_hcd_conn_disc_work);
/*
* Mark the first roothub as being USB 2.0.
* The USB 3.0 roothub will be registered later by
@@ -2259,6 +2303,8 @@ static int dummy_setup(struct usb_hcd *hcd)
} else {
the_controller.ss_hcd = hcd_to_dummy_hcd(hcd);
the_controller.ss_hcd->dum = &the_controller;
+ INIT_WORK(&the_controller.ss_hcd->conn_disc_work,
+ dummy_hcd_conn_disc_work);
hcd->speed = HCD_USB3;
hcd->self.root_hub->speed = USB_SPEED_SUPER;
}
@@ -2364,9 +2410,11 @@ static int dummy_hcd_remove (struct platform_device *pdev)
if (dum->ss_hcd) {
usb_remove_hcd(dummy_hcd_to_hcd(dum->ss_hcd));
usb_put_hcd(dummy_hcd_to_hcd(dum->ss_hcd));
+ cancel_work_sync(&dum->ss_hcd->conn_disc_work);
}
usb_remove_hcd(dummy_hcd_to_hcd(dum->hs_hcd));
usb_put_hcd(dummy_hcd_to_hcd(dum->hs_hcd));
+ cancel_work_sync(&dum->hs_hcd->conn_disc_work);
the_controller.ss_hcd = the_controller.hs_hcd = NULL;
return 0;
}
--
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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