diff --git a/drivers/usb/dwc2/core.c b/drivers/usb/dwc2/core.c index 84990a82363b86cba972571c961628281f41ece0..bb17a45779028cbbdbfb2d1eb848d4f59c0d5cd4 100644 --- a/drivers/usb/dwc2/core.c +++ b/drivers/usb/dwc2/core.c @@ -165,7 +165,7 @@ int dwc2_exit_partial_power_down(struct dwc2_hsotg *hsotg, bool restore) return ret; } } else { - ret = dwc2_restore_device_registers(hsotg); + ret = dwc2_restore_device_registers(hsotg, 0); if (ret) { dev_err(hsotg->dev, "%s: failed to restore device registers\n", __func__); diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h index aa69f2838fcd3ad26a25a34c8e3a01e7ade7bca6..85e083f021dcd456e5b2123e12e41510cfef8b1d 100644 --- a/drivers/usb/dwc2/core.h +++ b/drivers/usb/dwc2/core.h @@ -1213,7 +1213,7 @@ void dwc2_hsotg_disconnect(struct dwc2_hsotg *dwc2); int dwc2_hsotg_set_test_mode(struct dwc2_hsotg *hsotg, int testmode); #define dwc2_is_device_connected(hsotg) (hsotg->connected) int dwc2_backup_device_registers(struct dwc2_hsotg *hsotg); -int dwc2_restore_device_registers(struct dwc2_hsotg *hsotg); +int dwc2_restore_device_registers(struct dwc2_hsotg *hsotg, int remote_wakeup); int dwc2_hsotg_tx_fifo_count(struct dwc2_hsotg *hsotg); int dwc2_hsotg_tx_fifo_total_depth(struct dwc2_hsotg *hsotg); int dwc2_hsotg_tx_fifo_average_depth(struct dwc2_hsotg *hsotg); @@ -1237,7 +1237,8 @@ static inline int dwc2_hsotg_set_test_mode(struct dwc2_hsotg *hsotg, #define dwc2_is_device_connected(hsotg) (0) static inline int dwc2_backup_device_registers(struct dwc2_hsotg *hsotg) { return 0; } -static inline int dwc2_restore_device_registers(struct dwc2_hsotg *hsotg) +static inline int dwc2_restore_device_registers(struct dwc2_hsotg *hsotg, + int remote_wakeup) { return 0; } static inline int dwc2_hsotg_tx_fifo_count(struct dwc2_hsotg *hsotg) { return 0; } diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c index 89c6714241ee5ce9770ecacc744ea0d8d0881db6..379d6e1baaaa4b7bbf885283512b2d67efff3ab1 100644 --- a/drivers/usb/dwc2/gadget.c +++ b/drivers/usb/dwc2/gadget.c @@ -4827,11 +4827,13 @@ int dwc2_backup_device_registers(struct dwc2_hsotg *hsotg) * if controller power were disabled. * * @hsotg: Programming view of the DWC_otg controller + * @remote_wakeup: Indicates whether resume is initiated by Device or Host. + * + * Return: 0 if successful, negative error code otherwise */ -int dwc2_restore_device_registers(struct dwc2_hsotg *hsotg) +int dwc2_restore_device_registers(struct dwc2_hsotg *hsotg, int remote_wakeup) { struct dwc2_dregs_backup *dr; - u32 dctl; int i; dev_dbg(hsotg->dev, "%s\n", __func__); @@ -4845,30 +4847,42 @@ int dwc2_restore_device_registers(struct dwc2_hsotg *hsotg) } dr->valid = false; - dwc2_writel(dr->dcfg, hsotg->regs + DCFG); - dwc2_writel(dr->dctl, hsotg->regs + DCTL); + if (!remote_wakeup) + dwc2_writel(dr->dctl, hsotg->regs + DCTL); + dwc2_writel(dr->daintmsk, hsotg->regs + DAINTMSK); dwc2_writel(dr->diepmsk, hsotg->regs + DIEPMSK); dwc2_writel(dr->doepmsk, hsotg->regs + DOEPMSK); for (i = 0; i < hsotg->num_of_eps; i++) { /* Restore IN EPs */ - dwc2_writel(dr->diepctl[i], hsotg->regs + DIEPCTL(i)); dwc2_writel(dr->dieptsiz[i], hsotg->regs + DIEPTSIZ(i)); dwc2_writel(dr->diepdma[i], hsotg->regs + DIEPDMA(i)); + dwc2_writel(dr->doeptsiz[i], hsotg->regs + DOEPTSIZ(i)); + /** WA for enabled EPx's IN in DDMA mode. On entering to + * hibernation wrong value read and saved from DIEPDMAx, + * as result BNA interrupt asserted on hibernation exit + * by restoring from saved area. + */ + if (hsotg->params.g_dma_desc && + (dr->diepctl[i] & DXEPCTL_EPENA)) + dr->diepdma[i] = hsotg->eps_in[i]->desc_list_dma; dwc2_writel(dr->dtxfsiz[i], hsotg->regs + DPTXFSIZN(i)); - + dwc2_writel(dr->diepctl[i], hsotg->regs + DIEPCTL(i)); /* Restore OUT EPs */ - dwc2_writel(dr->doepctl[i], hsotg->regs + DOEPCTL(i)); dwc2_writel(dr->doeptsiz[i], hsotg->regs + DOEPTSIZ(i)); + /* WA for enabled EPx's OUT in DDMA mode. On entering to + * hibernation wrong value read and saved from DOEPDMAx, + * as result BNA interrupt asserted on hibernation exit + * by restoring from saved area. + */ + if (hsotg->params.g_dma_desc && + (dr->doepctl[i] & DXEPCTL_EPENA)) + dr->doepdma[i] = hsotg->eps_out[i]->desc_list_dma; dwc2_writel(dr->doepdma[i], hsotg->regs + DOEPDMA(i)); + dwc2_writel(dr->doepctl[i], hsotg->regs + DOEPCTL(i)); } - /* Set the Power-On Programming done bit */ - dctl = dwc2_readl(hsotg->regs + DCTL); - dctl |= DCTL_PWRONPRGDONE; - dwc2_writel(dctl, hsotg->regs + DCTL); - return 0; }