/* * Probe to determine the endianness of the controller. * We know that bit 7 of the PORTSC1 register is always set * and bit 15 is always clear. If uhci_readw() yields a value * with bit 7 (0x80) turned on then the current little-endian * setting is correct. Otherwise we assume the value was * byte-swapped; hence the register interface and presumably * also the descriptors are big-endian.
*/ if (!(uhci_readw(uhci, USBPORTSC1) & 0x80)) {
uhci->big_endian_mmio = 1;
uhci->big_endian_desc = 1;
}
uhci->rh_numports = uhci_count_ports(hcd);
/* Set up pointers to generic functions */
uhci->reset_hc = uhci_generic_reset_hc;
uhci->check_and_reset_hc = uhci_generic_check_and_reset_hc; /* No special actions need to be taken for the functions below */
uhci->configure_hc = NULL;
uhci->resume_detect_interrupts_are_broken = NULL;
uhci->global_suspend_mode_is_broken = NULL;
/* Reset if the controller isn't already safely quiescent. */
check_and_reset_hc(uhci); return 0;
}
/* Make sure the controller is quiescent and that we're not using it * any more. This is mainly for the benefit of programs which, like kexec, * expect the hardware to be idle: not doing DMA or generating IRQs. * * This routine may be called in a damaged or failing kernel. Hence we * do not acquire the spinlock before shutting down the controller.
*/ staticvoid uhci_hcd_grlib_shutdown(struct platform_device *op)
{ struct usb_hcd *hcd = platform_get_drvdata(op);
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