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tegra_ehci.c revision 1.3 
      1 /* $NetBSD: tegra_ehci.c,v 1.3 2015/05/09 12:07:52 jmcneill Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2015 Jared D. McNeill <jmcneill (at) invisible.ca>
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     21  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     22  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     23  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     24  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #include "locators.h"
     30 
     31 #include <sys/cdefs.h>
     32 __KERNEL_RCSID(0, "$NetBSD: tegra_ehci.c,v 1.3 2015/05/09 12:07:52 jmcneill Exp $");
     33 
     34 #include <sys/param.h>
     35 #include <sys/bus.h>
     36 #include <sys/device.h>
     37 #include <sys/intr.h>
     38 #include <sys/systm.h>
     39 #include <sys/kernel.h>
     40 
     41 #include <dev/usb/usb.h>
     42 #include <dev/usb/usbdi.h>
     43 #include <dev/usb/usbdivar.h>
     44 #include <dev/usb/usb_mem.h>
     45 #include <dev/usb/ehcireg.h>
     46 #include <dev/usb/ehcivar.h>
     47 
     48 #include <arm/nvidia/tegra_var.h>
     49 
     50 #define TEGRA_EHCI_REG_OFFSET	0x100
     51 
     52 static int	tegra_ehci_match(device_t, cfdata_t, void *);
     53 static void	tegra_ehci_attach(device_t, device_t, void *);
     54 
     55 struct tegra_ehci_softc {
     56 	struct ehci_softc	sc;
     57 	void			*sc_ih;
     58 
     59 	struct tegra_gpio_pin	*sc_pin_vbus;
     60 };
     61 
     62 CFATTACH_DECL2_NEW(tegra_ehci, sizeof(struct tegra_ehci_softc),
     63 	tegra_ehci_match, tegra_ehci_attach, NULL,
     64 	ehci_activate, NULL, ehci_childdet);
     65 
     66 static int
     67 tegra_ehci_match(device_t parent, cfdata_t cf, void *aux)
     68 {
     69 	return 1;
     70 }
     71 
     72 static void
     73 tegra_ehci_attach(device_t parent, device_t self, void *aux)
     74 {
     75 	struct tegra_ehci_softc * const sc = device_private(self);
     76 	struct tegraio_attach_args * const tio = aux;
     77 	const struct tegra_locators * const loc = &tio->tio_loc;
     78 	prop_dictionary_t prop = device_properties(self);
     79 	const char *pin;
     80 	int error;
     81 
     82 	sc->sc.sc_dev = self;
     83 	sc->sc.sc_bus.hci_private = &sc->sc;
     84 	sc->sc.sc_bus.dmatag = tio->tio_dmat;
     85 	sc->sc.sc_bus.usbrev = USBREV_2_0;
     86 	sc->sc.sc_flags = EHCIF_ETTF;
     87 	sc->sc.sc_id_vendor = 0x10de;
     88 	strlcpy(sc->sc.sc_vendor, "Tegra", sizeof(sc->sc.sc_vendor));
     89 	sc->sc.sc_size = loc->loc_size;
     90 	sc->sc.iot = tio->tio_bst;
     91 	bus_space_subregion(tio->tio_bst, tio->tio_bsh,
     92 	    loc->loc_offset + TEGRA_EHCI_REG_OFFSET,
     93 	    loc->loc_size - TEGRA_EHCI_REG_OFFSET, &sc->sc.ioh);
     94 
     95 	aprint_naive("\n");
     96 	aprint_normal(": USB%d\n", loc->loc_port + 1);
     97 
     98 	if (prop_dictionary_get_cstring_nocopy(prop, "vbus-gpio", &pin)) {
     99 		sc->sc_pin_vbus = tegra_gpio_acquire(pin,
    100 		    GPIO_PIN_OUTPUT | GPIO_PIN_OPENDRAIN);
    101 		if (sc->sc_pin_vbus)
    102 			tegra_gpio_write(sc->sc_pin_vbus, 1);
    103         }
    104 
    105 	sc->sc.sc_offs = EREAD1(&sc->sc, EHCI_CAPLENGTH);
    106 
    107 	sc->sc_ih = intr_establish(loc->loc_intr, IPL_USB, IST_LEVEL,
    108 	    ehci_intr, &sc->sc);
    109 	if (sc->sc_ih == NULL) {
    110 		aprint_error_dev(self, "couldn't establish interrupt %d\n",
    111 		    loc->loc_intr);
    112 		return;
    113 	}
    114 	aprint_normal_dev(self, "interrupting on irq %d\n", loc->loc_intr);
    115 
    116 	error = ehci_init(&sc->sc);
    117 	if (error != USBD_NORMAL_COMPLETION) {
    118 		aprint_error_dev(self, "init failed, error = %d\n", error);
    119 		return;
    120 	}
    121 
    122 	sc->sc.sc_child = config_found(self, &sc->sc.sc_bus, usbctlprint);
    123 }
    124