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usb: dwc2: exit hibernation on session request

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Controller enters hibernation through suspend interrupt on
disconnection. On connection, session request interrupt is generated.
dwc2 must exit hibernation and restore state from this interrupt
before continuing.

In host mode, exit from hibernation is handled by bus_resume function.

Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@intel.com>
Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Tested-by: Robert Baldyga <r.baldyga@samsung.com>
Tested-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Tested-by: John Youn <johnyoun@synopsys.com>
Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Mian Yousaf Kaukab 2015-09-29 12:08:30 +02:00 committed by Felipe Balbi
parent 8fc37b82a4
commit 21795c826a
1 changed files with 17 additions and 5 deletions
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18
drivers/usb/dwc2/core_intr.c
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@ -313,17 +313,29 @@ static void dwc2_handle_conn_id_status_change_intr(struct dwc2_hsotg *hsotg)
*/ */
static void dwc2_handle_session_req_intr(struct dwc2_hsotg *hsotg) static void dwc2_handle_session_req_intr(struct dwc2_hsotg *hsotg)
{ {
dev_dbg(hsotg->dev, "++Session Request Interrupt++\n"); int ret;
dev_dbg(hsotg->dev, "Session request interrupt - lx_state=%d\n",
hsotg->lx_state);
/* Clear interrupt */ /* Clear interrupt */
dwc2_writel(GINTSTS_SESSREQINT, hsotg->regs + GINTSTS); dwc2_writel(GINTSTS_SESSREQINT, hsotg->regs + GINTSTS);
if (dwc2_is_device_mode(hsotg)) {
if (hsotg->lx_state == DWC2_L2) {
ret = dwc2_exit_hibernation(hsotg, true);
if (ret && (ret != -ENOTSUPP))
dev_err(hsotg->dev,
"exit hibernation failed\n");
}
/* /*
* Report disconnect if there is any previous session established * Report disconnect if there is any previous session
* established
*/ */
if (dwc2_is_device_mode(hsotg))
dwc2_hsotg_disconnect(hsotg); dwc2_hsotg_disconnect(hsotg);
} }
}
/* /*
* This interrupt indicates that the DWC_otg controller has detected a * This interrupt indicates that the DWC_otg controller has detected a