5.4-stable review patch. If anyone has any objections, please let me know.
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From: Minas Harutyunyan Minas.Harutyunyan@synopsys.com
commit bae2bc73a59c200db53b6c15fb26bb758e2c6108 upstream.
Starting from core v4.30a changed order of programming GPWRDN_PMUACTV to 0 in case of exit from hibernation on remote wakeup signaling from device.
Fixes: c5c403dc4336 ("usb: dwc2: Add host/device hibernation functions") CC: stable@vger.kernel.org Signed-off-by: Minas Harutyunyan Minas.Harutyunyan@synopsys.com Link: https://lore.kernel.org/r/99385ec55ce73445b6fbd0f471c9bd40eb1c9b9e.170893979... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/dwc2/core.h | 1 + drivers/usb/dwc2/hcd.c | 17 +++++++++++++---- 2 files changed, 14 insertions(+), 4 deletions(-)
--- a/drivers/usb/dwc2/core.h +++ b/drivers/usb/dwc2/core.h @@ -1087,6 +1087,7 @@ struct dwc2_hsotg { bool needs_byte_swap;
/* DWC OTG HW Release versions */ +#define DWC2_CORE_REV_4_30a 0x4f54430a #define DWC2_CORE_REV_2_71a 0x4f54271a #define DWC2_CORE_REV_2_72a 0x4f54272a #define DWC2_CORE_REV_2_80a 0x4f54280a --- a/drivers/usb/dwc2/hcd.c +++ b/drivers/usb/dwc2/hcd.c @@ -5523,10 +5523,12 @@ int dwc2_host_exit_hibernation(struct dw dwc2_writel(hsotg, hr->hcfg, HCFG);
/* De-assert Wakeup Logic */ - gpwrdn = dwc2_readl(hsotg, GPWRDN); - gpwrdn &= ~GPWRDN_PMUACTV; - dwc2_writel(hsotg, gpwrdn, GPWRDN); - udelay(10); + if (!(rem_wakeup && hsotg->hw_params.snpsid >= DWC2_CORE_REV_4_30a)) { + gpwrdn = dwc2_readl(hsotg, GPWRDN); + gpwrdn &= ~GPWRDN_PMUACTV; + dwc2_writel(hsotg, gpwrdn, GPWRDN); + udelay(10); + }
hprt0 = hr->hprt0; hprt0 |= HPRT0_PWR; @@ -5551,6 +5553,13 @@ int dwc2_host_exit_hibernation(struct dw hprt0 |= HPRT0_RES; dwc2_writel(hsotg, hprt0, HPRT0);
+ /* De-assert Wakeup Logic */ + if ((rem_wakeup && hsotg->hw_params.snpsid >= DWC2_CORE_REV_4_30a)) { + gpwrdn = dwc2_readl(hsotg, GPWRDN); + gpwrdn &= ~GPWRDN_PMUACTV; + dwc2_writel(hsotg, gpwrdn, GPWRDN); + udelay(10); + } /* Wait for Resume time and then program HPRT again */ mdelay(100); hprt0 &= ~HPRT0_RES;