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      1 /*	$NetBSD: obio_ehci.c,v 1.7 2021/08/07 16:18:44 thorpej Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2001, 2002 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Lennart Augustsson (lennart (at) augustsson.net).
      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: obio_ehci.c,v 1.7 2021/08/07 16:18:44 thorpej Exp $");
     34 
     35 #include "locators.h"
     36 
     37 #include <sys/param.h>
     38 #include <sys/systm.h>
     39 #include <sys/kernel.h>
     40 #include <sys/device.h>
     41 #include <sys/proc.h>
     42 #include <sys/queue.h>
     43 
     44 #include <sys/bus.h>
     45 
     46 #include <arm/gemini/gemini_reg.h>
     47 #include <arm/gemini/gemini_obiovar.h>
     48 
     49 #include <dev/usb/usb.h>
     50 #include <dev/usb/usbdi.h>
     51 #include <dev/usb/usbdivar.h>
     52 #include <dev/usb/usb_mem.h>
     53 
     54 #include <dev/usb/ehcireg.h>
     55 #include <dev/usb/ehcivar.h>
     56 
     57 #ifdef EHCI_DEBUG
     58 #define DPRINTF(x)	if (ehcidebug) printf x
     59 extern int ehcidebug;
     60 #else
     61 #define DPRINTF(x)
     62 #endif
     63 
     64 #define	EHCI_HCOTGDEV_INTR_STATUS		0xc0
     65 #define	EHCI_HCOTGDEV_INTR_MASK			0xc4
     66 #define	HC_INT					0x04
     67 #define	OTG_INT					0x02
     68 #define	DEV_INT					0x01
     69 
     70 static int
     71 ehci_obio_intr(void *arg)
     72 {
     73 	struct ehci_softc * const sc = arg;
     74 	int rv = 0;
     75 	uint32_t v;
     76 
     77 	v = bus_space_read_4(sc->iot, sc->ioh, EHCI_HCOTGDEV_INTR_STATUS);
     78 	bus_space_write_4(sc->iot, sc->ioh, EHCI_HCOTGDEV_INTR_STATUS, v);
     79 	if (v & HC_INT)
     80 		rv = ehci_intr(sc);
     81 	return rv;
     82 }
     83 
     84 static int
     85 ehci_obio_match(device_t parent, cfdata_t match, void *aux)
     86 {
     87 	struct obio_attach_args * const obio = aux;
     88 
     89 	if (obio->obio_addr == GEMINI_USB0_BASE
     90 	    || obio->obio_addr == GEMINI_USB1_BASE)
     91 		return 1;
     92 
     93 	return 0;
     94 }
     95 
     96 static void
     97 ehci_obio_attach(device_t parent, device_t self, void *aux)
     98 {
     99 	struct ehci_softc * const sc = device_private(self);
    100 	struct obio_attach_args * const obio = aux;
    101 	const char * const devname = device_xname(self);
    102 
    103 	sc->sc_dev = self;
    104 	sc->sc_bus.ub_hcpriv = sc;
    105 	sc->iot = obio->obio_iot;
    106 
    107 	aprint_naive(": EHCI USB controller\n");
    108 	aprint_normal(": EHCI USB controller\n");
    109 
    110 	/* Map I/O registers */
    111 	if (bus_space_map(sc->iot, obio->obio_addr, obio->obio_size, 0,
    112 			   &sc->ioh)) {
    113 		aprint_error("%s: can't map memory space\n", devname);
    114 		return;
    115 	}
    116 
    117 	sc->sc_bus.ub_dmatag = obio->obio_dmat;
    118 
    119 	/* Disable interrupts, so we don't get any spurious ones. */
    120 	sc->sc_offs = EREAD1(sc, EHCI_CAPLENGTH);
    121 	DPRINTF(("%s: offs=%d\n", devname, sc->sc_offs));
    122 	EOWRITE4(sc, EHCI_USBINTR, 0);
    123 	bus_space_write_4(sc->iot, sc->ioh, EHCI_HCOTGDEV_INTR_MASK,
    124 	    OTG_INT|DEV_INT);
    125 
    126 	if (obio->obio_intr != OBIOCF_INTR_DEFAULT) {
    127 		intr_establish(obio->obio_intr, IPL_USB, IST_LEVEL,
    128 		    ehci_obio_intr, sc);
    129 	}
    130 
    131 	sc->sc_bus.ub_revision = USBREV_2_0;
    132 
    133 	int err = ehci_init(sc);
    134 	if (err) {
    135 		aprint_error("%s: init failed, error=%d\n", devname, err);
    136 		return;
    137 	}
    138 
    139 	/* Attach usb device. */
    140 	sc->sc_child = config_found(self, &sc->sc_bus, usbctlprint, CFARGS_NONE);
    141 }
    142 
    143 CFATTACH_DECL2_NEW(ehci_obio, sizeof(struct ehci_softc),
    144     ehci_obio_match, ehci_obio_attach, NULL, NULL, NULL, ehci_childdet);
    145