162 lines
4.6 KiB
C
162 lines
4.6 KiB
C
/* $NetBSD: epohci.c,v 1.3 2008/04/03 15:08:58 drochner Exp $ */
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/*-
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* Copyright (c) 2004 Jesse Off
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* All rights reserved.
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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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* USB Open Host Controller driver.
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*
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* OHCI spec: ftp://ftp.compaq.com/pub/supportinformation/papers/hcir1_0a.exe
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* USB spec: http://www.usb.org/developers/data/usb11.pdf
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: epohci.c,v 1.3 2008/04/03 15:08:58 drochner 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/device.h>
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#include <sys/proc.h>
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#include <sys/queue.h>
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/* busdma */
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#include <sys/mbuf.h>
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#include <uvm/uvm_extern.h>
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#include <machine/bus.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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#include <dev/usb/ohcireg.h>
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#include <dev/usb/ohcivar.h>
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#include <arm/ep93xx/ep93xxreg.h>
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#include <arm/ep93xx/ep93xxvar.h>
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#include <arm/ep93xx/epsocvar.h>
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int epohci_match(struct device *, struct cfdata *, void *);
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void epohci_attach(struct device *, struct device *, void *);
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void epohci_callback(struct device *);
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struct epohci_softc {
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struct ohci_softc sc;
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void *sc_ih;
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int sc_intr;
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};
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CFATTACH_DECL_NEW(epohci, sizeof(struct epohci_softc),
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epohci_match, epohci_attach, NULL, NULL);
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int
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epohci_match(struct device *parent, struct cfdata *match, void *aux)
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{
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/* EP93xx builtin OHCI module */
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return (1);
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}
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void
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epohci_attach(struct device *parent, struct device *self, void *aux)
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{
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struct epohci_softc *sc = device_private(self);
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struct epsoc_attach_args *sa = aux;
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u_int32_t i;
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bus_space_handle_t syscon_ioh;
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sc->sc.sc_dev = self;
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sc->sc.sc_bus.hci_private = sc;
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sc->sc.iot = sa->sa_iot;
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sc->sc.sc_bus.dmatag = sa->sa_dmat;
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sc->sc_intr = sa->sa_intr;
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/* Map I/O space */
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if (bus_space_map(sc->sc.iot, sa->sa_addr, sa->sa_size,
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0, &sc->sc.ioh)) {
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printf(": cannot map mem space\n");
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return;
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}
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/* Enable hclk clock gating to the USB block. */
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bus_space_map(sc->sc.iot, EP93XX_APB_HWBASE + EP93XX_APB_SYSCON,
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EP93XX_APB_SYSCON_SIZE, 0, &syscon_ioh);
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i = bus_space_read_4(sc->sc.iot, syscon_ioh, EP93XX_SYSCON_PwrCnt);
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i |= 0x10000000;
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bus_space_write_4(sc->sc.iot, syscon_ioh, EP93XX_SYSCON_PwrCnt, i);
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/*
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* Not sure if I understand the datasheet here, but we must wait a
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* few instructions and also make certain PLL2 is stable before
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* continuing. Hopefully, the check for PLL2 is enough, as the
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* datasheet is elusive to actually how many insns we need.
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*/
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do {
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i = bus_space_read_4(sc->sc.iot, syscon_ioh,
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EP93XX_SYSCON_PwrSts);
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} while ((i & 0x100) == 0);
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bus_space_unmap(sc->sc.iot, syscon_ioh, EP93XX_APB_SYSCON_SIZE);
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printf("\n");
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/* Defer the rest until later */
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config_defer(self, epohci_callback);
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}
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void
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epohci_callback(self)
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struct device *self;
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{
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struct epohci_softc *sc = device_private(self);
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usbd_status r;
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/* Disable interrupts, so we don't get any spurious ones. */
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bus_space_write_4(sc->sc.iot, sc->sc.ioh, OHCI_INTERRUPT_DISABLE,
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OHCI_ALL_INTRS);
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strlcpy(sc->sc.sc_vendor, "Cirrus Logic", sizeof sc->sc.sc_vendor);
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sc->sc_ih = ep93xx_intr_establish(sc->sc_intr, IPL_USB,
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ohci_intr, sc);
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r = ohci_init(&sc->sc);
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if (r != USBD_NORMAL_COMPLETION) {
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printf("%s: init failed, error=%d\n", device_xname(self), r);
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ep93xx_intr_disestablish(sc->sc_ih);
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return;
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}
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/* Attach usb device. */
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sc->sc.sc_child = config_found(self, &sc->sc.sc_bus, usbctlprint);
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}
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