diff options
Diffstat (limited to 'patches.tizen/1030-USB-gadget-s3c-hsotg-fix-disconnect-handling.patch')
| -rw-r--r-- | patches.tizen/1030-USB-gadget-s3c-hsotg-fix-disconnect-handling.patch | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/patches.tizen/1030-USB-gadget-s3c-hsotg-fix-disconnect-handling.patch b/patches.tizen/1030-USB-gadget-s3c-hsotg-fix-disconnect-handling.patch new file mode 100644 index 00000000000..2e55676d75e --- /dev/null +++ b/patches.tizen/1030-USB-gadget-s3c-hsotg-fix-disconnect-handling.patch @@ -0,0 +1,57 @@ +From 2d4c789908c85dbb8f5ea362f1bb626fe7b428be Mon Sep 17 00:00:00 2001 +From: Robert Baldyga <r.baldyga@samsung.com> +Date: Thu, 14 Nov 2013 12:10:20 +0100 +Subject: [PATCH 1030/1302] USB: gadget: s3c-hsotg: fix disconnect handling + +This patch moves s3c_hsotg_disconnect function call from USBSusp interrupt +handler to SET_ADDRESS request handler. + +It's because disconnected state can't be detected directly, because this +hardware doesn't support Disconnected interrupt for device mode. For both +Suspend and Disconnect events there is one interrupt USBSusp, but calling +s3c_hsotg_disconnect from this interrupt handler causes config reset in +composite layer, which is not undesirable for Suspended state. + +For this reason s3c_hsotg_disconnect is called from SET_ADDRESS request +handler, which occurs always after disconnection, so we do disconnect +immediately before we are connected again. It's probably only way we +can do handle disconnection correctly. + +Change-Id: I8e69b532077c6ad76489e70fcc3f8d525fe75cf3 +Signed-off-by: Robert Baldyga <r.baldyga@samsung.com> +Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com> +--- + drivers/usb/gadget/s3c-hsotg.c | 3 ++- + 1 file changed, 2 insertions(+), 1 deletion(-) + +diff --git a/drivers/usb/gadget/s3c-hsotg.c b/drivers/usb/gadget/s3c-hsotg.c +index 6cfb562..175f35a 100644 +--- a/drivers/usb/gadget/s3c-hsotg.c ++++ b/drivers/usb/gadget/s3c-hsotg.c +@@ -1167,6 +1167,7 @@ static int s3c_hsotg_process_req_feature(struct s3c_hsotg *hsotg, + } + + static void s3c_hsotg_enqueue_setup(struct s3c_hsotg *hsotg); ++static void s3c_hsotg_disconnect(struct s3c_hsotg *hsotg); + + /** + * s3c_hsotg_process_control - process a control request +@@ -1208,6 +1209,7 @@ static void s3c_hsotg_process_control(struct s3c_hsotg *hsotg, + if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) { + switch (ctrl->bRequest) { + case USB_REQ_SET_ADDRESS: ++ s3c_hsotg_disconnect(hsotg); + dcfg = readl(hsotg->regs + DCFG); + dcfg &= ~DCFG_DevAddr_MASK; + dcfg |= ctrl->wValue << DCFG_DevAddr_SHIFT; +@@ -2501,7 +2503,6 @@ irq_retry: + writel(GINTSTS_USBSusp, hsotg->regs + GINTSTS); + + call_gadget(hsotg, suspend); +- s3c_hsotg_disconnect(hsotg); + } + + if (gintsts & GINTSTS_WkUpInt) { +-- +1.8.3.2 + |