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ehci_acpi.c revision 1.2 
      1 /* $NetBSD: ehci_acpi.c,v 1.2 2018/10/26 23:33:38 jmcneill Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2018 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jared McNeill <jmcneill (at) invisible.ca>.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 __KERNEL_RCSID(0, "$NetBSD: ehci_acpi.c,v 1.2 2018/10/26 23:33:38 jmcneill Exp $");
     34 
     35 #include <sys/param.h>
     36 #include <sys/bus.h>
     37 #include <sys/cpu.h>
     38 #include <sys/device.h>
     39 
     40 #include <dev/usb/usb.h>
     41 #include <dev/usb/usbdi.h>
     42 #include <dev/usb/usbdivar.h>
     43 #include <dev/usb/usb_mem.h>
     44 #include <dev/usb/ehcireg.h>
     45 #include <dev/usb/ehcivar.h>
     46 
     47 #include <dev/acpi/acpireg.h>
     48 #include <dev/acpi/acpivar.h>
     49 #include <dev/acpi/acpi_usb.h>
     50 
     51 static const char * const compatible[] = {
     52 	"PNP0D20",	/* EHCI-compliant USB controller without standard debug */
     53 	"PNP0D25",	/* EHCI-compliant USB controller with standard debug */
     54 	NULL
     55 };
     56 
     57 struct ehci_acpi_softc {
     58 	struct ehci_softc	sc_ehci;
     59 	ACPI_HANDLE		sc_handle;
     60 };
     61 
     62 static int	ehci_acpi_match(device_t, cfdata_t, void *);
     63 static void	ehci_acpi_attach(device_t, device_t, void *);
     64 
     65 static void	ehci_acpi_init(struct ehci_softc *);
     66 
     67 CFATTACH_DECL2_NEW(ehci_acpi, sizeof(struct ehci_acpi_softc),
     68 	ehci_acpi_match, ehci_acpi_attach, NULL,
     69 	ehci_activate, NULL, ehci_childdet);
     70 
     71 static int
     72 ehci_acpi_match(device_t parent, cfdata_t cf, void *aux)
     73 {
     74 	struct acpi_attach_args *aa = aux;
     75 
     76 	if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE)
     77 		return 0;
     78 
     79 	return acpi_match_hid(aa->aa_node->ad_devinfo, compatible);
     80 }
     81 
     82 static void
     83 ehci_acpi_attach(device_t parent, device_t self, void *aux)
     84 {
     85 	struct ehci_acpi_softc * const asc = device_private(self);
     86 	struct ehci_softc * const sc = &asc->sc_ehci;
     87 	struct acpi_attach_args *aa = aux;
     88 	struct acpi_resources res;
     89 	struct acpi_mem *mem;
     90 	struct acpi_irq *irq;
     91 	ACPI_STATUS rv;
     92 	int error;
     93 	void *ih;
     94 
     95 	asc->sc_handle = aa->aa_node->ad_handle;
     96 
     97 	sc->sc_dev = self;
     98 	sc->sc_bus.ub_hcpriv = sc;
     99 	sc->sc_bus.ub_dmatag = aa->aa_dmat;
    100 	sc->sc_bus.ub_revision = USBREV_2_0;
    101 	sc->sc_flags = EHCIF_ETTF;
    102 	sc->sc_vendor_init = ehci_acpi_init;
    103 
    104 	rv = acpi_resource_parse(sc->sc_dev, asc->sc_handle, "_CRS",
    105 	    &res, &acpi_resource_parse_ops_default);
    106 	if (ACPI_FAILURE(rv))
    107 		return;
    108 
    109 	mem = acpi_res_mem(&res, 0);
    110 	if (mem == NULL) {
    111 		aprint_error_dev(self, "couldn't find mem resource\n");
    112 		goto done;
    113 	}
    114 
    115 	irq = acpi_res_irq(&res, 0);
    116 	if (mem == NULL) {
    117 		aprint_error_dev(self, "couldn't find irq resource\n");
    118 		goto done;
    119 	}
    120 
    121 	sc->sc_size = mem->ar_length;
    122 	sc->iot = aa->aa_memt;
    123 	error = bus_space_map(sc->iot, mem->ar_base, mem->ar_length, 0, &sc->ioh);
    124 	if (error) {
    125 		aprint_error_dev(self, "couldn't map registers\n");
    126 		return;
    127 	}
    128 
    129 	/* Disable interrupts */
    130 	sc->sc_offs = EREAD1(sc, EHCI_CAPLENGTH);
    131 	EOWRITE4(sc, EHCI_USBINTR, 0);
    132 
    133 	const int type = (irq->ar_type == ACPI_EDGE_SENSITIVE) ? IST_EDGE : IST_LEVEL;
    134 	ih = intr_establish(irq->ar_irq, IPL_USB, type, ehci_intr, sc);
    135 	if (ih == NULL) {
    136 		aprint_error_dev(self, "couldn't establish interrupt\n");
    137 		return;
    138 	}
    139 
    140 	error = ehci_init(sc);
    141 	if (error) {
    142 		aprint_error_dev(self, "init failed, error = %d\n", error);
    143 		return;
    144 	}
    145 
    146 	sc->sc_child = config_found(self, &sc->sc_bus, usbctlprint);
    147 
    148 done:
    149 	acpi_resource_cleanup(&res);
    150 }
    151 
    152 static void
    153 ehci_acpi_init(struct ehci_softc *sc)
    154 {
    155 	struct ehci_acpi_softc * const asc = (struct ehci_acpi_softc *)sc;
    156 
    157 	acpi_usb_post_reset(asc->sc_handle);
    158 }
    159