354 lines
8.8 KiB
C
354 lines
8.8 KiB
C
/* $NetBSD: exynos_usb.c,v 1.13 2014/09/30 14:23:41 reinoud Exp $ */
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/*-
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* Copyright (c) 2014 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Reinoud Zandijk.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "locators.h"
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#include "ohci.h"
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#include "ehci.h"
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#include <sys/cdefs.h>
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__KERNEL_RCSID(1, "$NetBSD: exynos_usb.c,v 1.13 2014/09/30 14:23:41 reinoud Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/intr.h>
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#include <sys/bus.h>
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#include <sys/device.h>
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#include <sys/proc.h>
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#include <sys/queue.h>
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#include <sys/kmem.h>
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#include <sys/gpio.h>
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#include <dev/usb/usb.h>
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#include <dev/usb/usbdi.h>
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#include <dev/usb/usbdivar.h>
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#include <dev/usb/usb_mem.h>
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#if NOHCI > 0
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#include <dev/usb/ohcireg.h>
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#include <dev/usb/ohcivar.h>
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#endif
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#if NEHCI > 0
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#include <dev/usb/ehcireg.h>
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#include <dev/usb/ehcivar.h>
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#endif
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#include <arm/samsung/exynos_reg.h>
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#include <arm/samsung/exynos_var.h>
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#include <arm/samsung/exynos_io.h>
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struct exynos_usb_softc {
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device_t sc_self;
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/* keep our tags here */
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bus_dma_tag_t sc_dmat;
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bus_space_tag_t sc_bst;
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bus_space_handle_t sc_ehci_bsh;
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bus_space_handle_t sc_ohci_bsh;
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bus_space_handle_t sc_usb2phy_bsh;
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device_t sc_ohci_dev;
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device_t sc_ehci_dev;
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int sc_irq;
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void *sc_intrh;
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} exynos_usb_sc;
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struct exynos_usb_attach_args {
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const char *name;
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};
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/* forwards */
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static int exynos_usb_intr(void *arg);
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static int exynos_usb_match(device_t, cfdata_t, void *);
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static void exynos_usb_attach(device_t, device_t, void *);
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CFATTACH_DECL_NEW(exyo_usb, 0,
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exynos_usb_match, exynos_usb_attach, NULL, NULL);
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static int
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exynos_usb_match(device_t parent, cfdata_t cf, void *aux)
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{
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/* there can only be one */
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if (exynos_usb_sc.sc_self)
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return 0;
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return 1;
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}
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static void
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exynos_usb_attach(device_t parent, device_t self, void *aux)
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{
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struct exynos_usb_softc * const sc = &exynos_usb_sc;
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struct exyo_attach_args *exyoaa = (struct exyo_attach_args *) aux;
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struct exyo_locators *loc = &exyoaa->exyo_loc;
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bus_size_t ehci_offset, ohci_offset, usb2phy_offset;
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/* no locators expected */
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KASSERT(loc->loc_port == EXYOCF_PORT_DEFAULT);
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KASSERT(loc->loc_intr != EXYOCF_INTR_DEFAULT);
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/* copy our device handle */
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sc->sc_self = self;
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sc->sc_irq = loc->loc_intr;
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/* get our bushandles */
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sc->sc_bst = exyoaa->exyo_core_bst;
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sc->sc_dmat = exyoaa->exyo_dmat;
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// sc->sc_dmat = exyoaa->exyo_coherent_dmat;
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#ifdef EXYNOS4
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ehci_offset = EXYNOS4_USB2_HOST_EHCI_OFFSET;
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ohci_offset = EXYNOS4_USB2_HOST_OHCI_OFFSET;
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usb2phy_offset = EXYNOS4_USB2_HOST_PHYCTRL_OFFSET;
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#endif
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#ifdef EXYNOS5
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ehci_offset = EXYNOS5_USB2_HOST_EHCI_OFFSET;
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ohci_offset = EXYNOS5_USB2_HOST_OHCI_OFFSET;
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usb2phy_offset = EXYNOS5_USB2_HOST_PHYCTRL_OFFSET;
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#endif
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bus_space_subregion(sc->sc_bst, exyoaa->exyo_core_bsh,
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ehci_offset, EXYNOS_BLOCK_SIZE,
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&sc->sc_ehci_bsh);
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bus_space_subregion(sc->sc_bst, exyoaa->exyo_core_bsh,
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ohci_offset, EXYNOS_BLOCK_SIZE,
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&sc->sc_ohci_bsh);
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bus_space_subregion(sc->sc_bst, exyoaa->exyo_core_bsh,
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usb2phy_offset, EXYNOS_BLOCK_SIZE,
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&sc->sc_usb2phy_bsh);
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aprint_naive("\n");
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aprint_normal("\n");
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/* power up USB subsystem */
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exynos_usb_soc_powerup();
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/* init USB phys */
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exynos_usb_phy_init(sc->sc_usb2phy_bsh);
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/*
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* Disable interrupts
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*
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* To prevent OHCI lockups on Exynos5 SoCs, we first have to read the
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* address before we set it; this is most likely a bug in the SoC
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*/
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#if NOHCI > 0
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int regval;
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regval = bus_space_read_1(sc->sc_bst, sc->sc_ohci_bsh,
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OHCI_INTERRUPT_DISABLE);
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regval = OHCI_ALL_INTRS;
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bus_space_write_4(sc->sc_bst, sc->sc_ohci_bsh,
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OHCI_INTERRUPT_DISABLE, regval);
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#endif
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#if NEHCI > 0
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bus_size_t caplength = bus_space_read_1(sc->sc_bst,
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sc->sc_ehci_bsh, EHCI_CAPLENGTH);
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bus_space_write_4(sc->sc_bst, sc->sc_ehci_bsh,
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caplength + EHCI_USBINTR, 0);
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#endif
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/* claim shared interrupt for OHCI/EHCI */
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sc->sc_intrh = intr_establish(sc->sc_irq,
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IPL_USB, IST_LEVEL, exynos_usb_intr, sc);
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if (!sc->sc_intrh) {
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aprint_error(": unable to establish interrupt at irq %d\n",
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sc->sc_irq);
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/* disable? TBD */
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return;
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}
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aprint_normal_dev(sc->sc_self, "USB2 host interrupting on irq %d\n",
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sc->sc_irq);
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#if NOHCI > 0
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/* attach OHCI */
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struct exynos_usb_attach_args usb_ohci = {
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.name = "ohci",
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};
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sc->sc_ohci_dev = config_found(self, &usb_ohci, NULL);
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#endif
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#if NEHCI > 0
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/* attach EHCI */
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struct exynos_usb_attach_args usb_ehci = {
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.name = "ehci",
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};
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sc->sc_ehci_dev = config_found(self, &usb_ehci, NULL);
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#endif
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}
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static int
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exynos_usb_intr(void *arg)
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{
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struct exynos_usb_softc *sc = (struct exynos_usb_softc *) arg;
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void *private;
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int ret = 0;
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#if NEHCI > 0
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private = device_private(sc->sc_ehci_dev);
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if (private)
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ret = ehci_intr(private);
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#endif
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/* XXX should we always deliver to ohci even if ehci takes it? */
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// if (ret)
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// return ret;
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#if NOHCI > 0
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private = device_private(sc->sc_ohci_dev);
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if (private)
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ret = ohci_intr(private);
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#endif
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return ret;
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}
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#if NOHCI > 0
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static int exynos_ohci_match(device_t, cfdata_t, void *);
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static void exynos_ohci_attach(device_t, device_t, void *);
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CFATTACH_DECL_NEW(ohci_exyousb, sizeof(struct ohci_softc),
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exynos_ohci_match, exynos_ohci_attach, NULL, NULL);
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static int
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exynos_ohci_match(device_t parent, cfdata_t cf, void *aux)
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{
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struct exynos_usb_attach_args *euaa = aux;
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if (strcmp(euaa->name, "ohci"))
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return 0;
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return 1;
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}
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static void
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exynos_ohci_attach(device_t parent, device_t self, void *aux)
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{
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struct exynos_usb_softc *usbsc = &exynos_usb_sc;
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struct ohci_softc *sc = device_private(self);
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int r;
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sc->sc_dev = self;
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sc->iot = usbsc->sc_bst;
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sc->ioh = usbsc->sc_ohci_bsh;
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sc->sc_size = EXYNOS_BLOCK_SIZE;
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sc->sc_bus.dmatag = usbsc->sc_dmat;
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sc->sc_bus.hci_private = sc;
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strlcpy(sc->sc_vendor, "exynos", sizeof(sc->sc_vendor));
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aprint_naive(": OHCI USB controller\n");
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aprint_normal(": OHCI USB controller\n");
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/* attach */
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r = ohci_init(sc);
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if (r != USBD_NORMAL_COMPLETION) {
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aprint_error_dev(self, "init failed, error = %d\n", r);
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/* disable : TBD */
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return;
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}
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sc->sc_child = config_found(self, &sc->sc_bus, usbctlprint);
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aprint_normal_dev(sc->sc_dev, "interrupting on irq %d\n",
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usbsc->sc_irq);
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}
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#endif
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#if NEHCI > 0
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static int exynos_ehci_match(device_t, cfdata_t, void *);
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static void exynos_ehci_attach(device_t, device_t, void *);
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CFATTACH_DECL_NEW(ehci_exyousb, sizeof(struct ehci_softc),
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exynos_ehci_match, exynos_ehci_attach, NULL, NULL);
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static int
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exynos_ehci_match(device_t parent, cfdata_t cf, void *aux)
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{
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struct exynos_usb_attach_args *euaa = aux;
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if (strcmp(euaa->name, "ehci"))
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return 0;
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return 1;
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}
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static void
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exynos_ehci_attach(device_t parent, device_t self, void *aux)
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{
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struct exynos_usb_softc *usbsc = &exynos_usb_sc;
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struct ehci_softc *sc = device_private(self);
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int r;
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sc->sc_dev = self;
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sc->iot = usbsc->sc_bst;
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sc->ioh = usbsc->sc_ehci_bsh;
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sc->sc_size = EXYNOS_BLOCK_SIZE;
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sc->sc_bus.dmatag = usbsc->sc_dmat;
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sc->sc_bus.hci_private = sc;
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sc->sc_bus.usbrev = USBREV_2_0;
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sc->sc_ncomp = 0;
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if (usbsc->sc_ohci_dev != NULL)
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sc->sc_comps[sc->sc_ncomp++] = usbsc->sc_ohci_dev;
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strlcpy(sc->sc_vendor, "exynos", sizeof(sc->sc_vendor));
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aprint_naive(": EHCI USB controller\n");
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aprint_normal(": EHCI USB controller\n");
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/* attach */
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r = ehci_init(sc);
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if (r != USBD_NORMAL_COMPLETION) {
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aprint_error_dev(self, "init failed, error = %d\n", r);
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/* disable : TBD */
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return;
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}
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sc->sc_child = config_found(self, &sc->sc_bus, usbctlprint);
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aprint_normal_dev(sc->sc_dev, "interrupting on irq %d\n",
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usbsc->sc_irq);
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}
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#endif
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