diff options
Diffstat (limited to 'drivers/usb/chipidea/udc.c')
| -rw-r--r-- | drivers/usb/chipidea/udc.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c index 8c3e3a635ac2..54c09245ad05 100644 --- a/drivers/usb/chipidea/udc.c +++ b/drivers/usb/chipidea/udc.c @@ -2181,6 +2181,34 @@ static void udc_id_switch_for_host(struct ci_hdrc *ci) ci->platdata->pins_default); } +#ifdef CONFIG_PM_SLEEP +static void udc_suspend(struct ci_hdrc *ci) +{ + /* + * Set OP_ENDPTLISTADDR to be non-zero for + * checking if controller resume from power lost + * in non-host mode. + */ + if (hw_read(ci, OP_ENDPTLISTADDR, ~0) == 0) + hw_write(ci, OP_ENDPTLISTADDR, ~0, ~0); +} + +static void udc_resume(struct ci_hdrc *ci, bool power_lost) +{ + if (power_lost) { + if (ci->is_otg) + hw_write_otgsc(ci, OTGSC_BSVIS | OTGSC_BSVIE, + OTGSC_BSVIS | OTGSC_BSVIE); + if (ci->vbus_active) + usb_gadget_vbus_disconnect(&ci->gadget); + } + + /* Restore value 0 if it was set for power lost check */ + if (hw_read(ci, OP_ENDPTLISTADDR, ~0) == 0xFFFFFFFF) + hw_write(ci, OP_ENDPTLISTADDR, ~0, 0); +} +#endif + /** * ci_hdrc_gadget_init - initialize device related bits * @ci: the controller @@ -2201,6 +2229,10 @@ int ci_hdrc_gadget_init(struct ci_hdrc *ci) rdrv->start = udc_id_switch_for_device; rdrv->stop = udc_id_switch_for_host; +#ifdef CONFIG_PM_SLEEP + rdrv->suspend = udc_suspend; + rdrv->resume = udc_resume; +#endif rdrv->irq = udc_irq; rdrv->name = "gadget"; |