diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.19/950-0312-usb-dwc2-Disable-all-EP-s-on-disconnect.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.19/950-0312-usb-dwc2-Disable-all-EP-s-on-disconnect.patch | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.19/950-0312-usb-dwc2-Disable-all-EP-s-on-disconnect.patch b/target/linux/brcm2708/patches-4.19/950-0312-usb-dwc2-Disable-all-EP-s-on-disconnect.patch new file mode 100644 index 0000000000..90004c8b0f --- /dev/null +++ b/target/linux/brcm2708/patches-4.19/950-0312-usb-dwc2-Disable-all-EP-s-on-disconnect.patch @@ -0,0 +1,107 @@ +From e87be7d6627b4dc1ebd9173b1bf29c16b4ebd93f Mon Sep 17 00:00:00 2001 +From: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com> +Date: Wed, 19 Sep 2018 18:13:52 +0400 +Subject: [PATCH 312/703] usb: dwc2: Disable all EP's on disconnect + +commit dccf1bad4be7eaa096c1f3697bd37883f9a08ecb upstream. + +Disabling all EP's allow to reset EP's to initial state. +On disconnect disable all EP's instead of just killing +all requests. Because of some platform didn't catch +disconnect event, same stuff added to +dwc2_hsotg_core_init_disconnected() function when USB +reset detected on the bus. + +Changed from version 1: +Changed lock acquire flow in dwc2_hsotg_ep_disable() +function. + +Signed-off-by: Minas Harutyunyan <hminas@synopsys.com> +Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com> +--- + drivers/usb/dwc2/gadget.c | 30 +++++++++++++++++++++++------- + 1 file changed, 23 insertions(+), 7 deletions(-) + +--- a/drivers/usb/dwc2/gadget.c ++++ b/drivers/usb/dwc2/gadget.c +@@ -3107,6 +3107,8 @@ static void kill_all_requests(struct dwc + dwc2_hsotg_txfifo_flush(hsotg, ep->fifo_index); + } + ++static int dwc2_hsotg_ep_disable(struct usb_ep *ep); ++ + /** + * dwc2_hsotg_disconnect - disconnect service + * @hsotg: The device state. +@@ -3125,13 +3127,12 @@ void dwc2_hsotg_disconnect(struct dwc2_h + hsotg->connected = 0; + hsotg->test_mode = 0; + ++ /* all endpoints should be shutdown */ + for (ep = 0; ep < hsotg->num_of_eps; ep++) { + if (hsotg->eps_in[ep]) +- kill_all_requests(hsotg, hsotg->eps_in[ep], +- -ESHUTDOWN); ++ dwc2_hsotg_ep_disable(&hsotg->eps_in[ep]->ep); + if (hsotg->eps_out[ep]) +- kill_all_requests(hsotg, hsotg->eps_out[ep], +- -ESHUTDOWN); ++ dwc2_hsotg_ep_disable(&hsotg->eps_out[ep]->ep); + } + + call_gadget(hsotg, disconnect); +@@ -3189,13 +3190,23 @@ void dwc2_hsotg_core_init_disconnected(s + u32 val; + u32 usbcfg; + u32 dcfg = 0; ++ int ep; + + /* Kill any ep0 requests as controller will be reinitialized */ + kill_all_requests(hsotg, hsotg->eps_out[0], -ECONNRESET); + +- if (!is_usb_reset) ++ if (!is_usb_reset) { + if (dwc2_core_reset(hsotg, true)) + return; ++ } else { ++ /* all endpoints should be shutdown */ ++ for (ep = 1; ep < hsotg->num_of_eps; ep++) { ++ if (hsotg->eps_in[ep]) ++ dwc2_hsotg_ep_disable(&hsotg->eps_in[ep]->ep); ++ if (hsotg->eps_out[ep]) ++ dwc2_hsotg_ep_disable(&hsotg->eps_out[ep]->ep); ++ } ++ } + + /* + * we must now enable ep0 ready for host detection and then +@@ -3996,6 +4007,7 @@ static int dwc2_hsotg_ep_disable(struct + unsigned long flags; + u32 epctrl_reg; + u32 ctrl; ++ int locked; + + dev_dbg(hsotg->dev, "%s(ep %p)\n", __func__, ep); + +@@ -4011,7 +4023,9 @@ static int dwc2_hsotg_ep_disable(struct + + epctrl_reg = dir_in ? DIEPCTL(index) : DOEPCTL(index); + +- spin_lock_irqsave(&hsotg->lock, flags); ++ locked = spin_is_locked(&hsotg->lock); ++ if (!locked) ++ spin_lock_irqsave(&hsotg->lock, flags); + + ctrl = dwc2_readl(hsotg, epctrl_reg); + +@@ -4035,7 +4049,9 @@ static int dwc2_hsotg_ep_disable(struct + hs_ep->fifo_index = 0; + hs_ep->fifo_size = 0; + +- spin_unlock_irqrestore(&hsotg->lock, flags); ++ if (!locked) ++ spin_unlock_irqrestore(&hsotg->lock, flags); ++ + return 0; + } + |