static int pci_disable(void)
{
struct pci_dev *dev = ltp_pci.dev;
prk_info("disable pci device");
/* check if device pointer exists */
if (!dev) {
prk_err("dev is NULL");
return TFAIL;
}
prk_info("is pci enabled '%d', is managed '%d'",
pci_is_enabled(dev), pci_is_managed(dev));
pci_release_regions(dev);
pci_disable_device(dev);
if (dev->current_state == PCI_D3hot ||
dev->current_state == PCI_D3cold) {
prk_info("disabled pci device, state '%s'",
pci_power_name(dev->current_state));
return TPASS;
}
prk_err("failed to disable pci device, state '%s'",
pci_power_name(dev->current_state));
return TFAIL;
}
static int hcd_pci_suspend_noirq(struct device *dev)
{
struct pci_dev *pci_dev = to_pci_dev(dev);
struct usb_hcd *hcd = pci_get_drvdata(pci_dev);
int retval;
retval = check_root_hub_suspended(dev);
if (retval)
return retval;
pci_save_state(pci_dev);
/* If the root hub is HALTed rather than SUSPENDed,
* disallow remote wakeup.
*/
if (hcd->state == HC_STATE_HALT)
device_set_wakeup_enable(dev, 0);
dev_dbg(dev, "wakeup: %d\n", device_may_wakeup(dev));
/* Possibly enable remote wakeup,
* choose the appropriate low-power state, and go to that state.
*/
retval = pci_prepare_to_sleep(pci_dev);
if (retval == -EIO) { /* Low-power not supported */
dev_dbg(dev, "--> PCI D0 legacy\n");
retval = 0;
} else if (retval == 0) {
dev_dbg(dev, "--> PCI %s\n",
pci_power_name(pci_dev->current_state));
} else {
suspend_report_result(pci_prepare_to_sleep, retval);
return retval;
}
#ifdef CONFIG_PPC_PMAC
/* Disable ASIC clocks for USB */
if (machine_is(powermac)) {
struct device_node *of_node;
of_node = pci_device_to_OF_node(pci_dev);
if (of_node)
pmac_call_feature(PMAC_FTR_USB_ENABLE, of_node, 0, 0);
}
#endif
return retval;
}