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      1 /*	$NetBSD: ohci_plb.c,v 1.2 2026/06/19 18:55:23 rkujawa Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2026 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Radoslaw Kujawa.
      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 AUTHOR ``AS IS'' AND ANY EXPRESS OR
     20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     21  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     22  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     24  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     28  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 /*
     32  * OHCI companion of on-chip EHCI
     33  */
     34 
     35 #include <sys/cdefs.h>
     36 __KERNEL_RCSID(0, "$NetBSD: ohci_plb.c,v 1.2 2026/06/19 18:55:23 rkujawa Exp $");
     37 
     38 #include "opt_ppc4xx.h"
     39 
     40 #include <sys/param.h>
     41 #include <sys/bus.h>
     42 #include <sys/device.h>
     43 #include <sys/extent.h>
     44 
     45 #include <powerpc/ibm4xx/cpu.h>
     46 #include <powerpc/ibm4xx/dev/plbvar.h>
     47 #ifdef PPC4XX_L2CACHE
     48 #include <powerpc/ibm4xx/ibm4xx_460ex_l2.h>
     49 #endif
     50 
     51 #include <dev/usb/usb.h>
     52 #include <dev/usb/usbdi.h>
     53 #include <dev/usb/usbdivar.h>
     54 #include <dev/usb/usb_mem.h>
     55 #include <dev/usb/ohcireg.h>
     56 #include <dev/usb/ohcivar.h>
     57 
     58 #define OHCI_PLB_SIZE	0x400	/* EHCI follows at +0x400 */
     59 
     60 #include "locators.h"
     61 
     62 static int	ohci_plb_match(device_t, cfdata_t, void *);
     63 static void	ohci_plb_attach(device_t, device_t, void *);
     64 
     65 CFATTACH_DECL_NEW(ohci_plb, sizeof(struct ohci_softc),
     66     ohci_plb_match, ohci_plb_attach, NULL, NULL);
     67 
     68 static struct powerpc_bus_space ohci_plb_tag = {
     69 	_BUS_SPACE_LITTLE_ENDIAN | _BUS_SPACE_MEM_TYPE,
     70 	0x00000000,
     71 };
     72 static char ohci_ex_storage[EXTENT_FIXED_STORAGE_SIZE(8)]
     73     __attribute__((aligned(8)));
     74 
     75 static int
     76 ohci_plb_match(device_t parent, cfdata_t match, void *aux)
     77 {
     78 	struct plb_attach_args *paa = aux;
     79 
     80 	if (strcmp(paa->plb_name, match->cf_name) != 0)
     81 		return 0;
     82 
     83 	if (match->cf_loc[PLBCF_ADDR] == PLBCF_ADDR_DEFAULT)
     84 		panic("ohci_plb_match: wildcard addr not allowed");
     85 	if (match->cf_loc[PLBCF_IRQ] == PLBCF_IRQ_DEFAULT)
     86 		panic("ohci_plb_match: wildcard IRQ not allowed");
     87 
     88 	paa->plb_addr = match->cf_loc[PLBCF_ADDR];
     89 	paa->plb_irq = match->cf_loc[PLBCF_IRQ];
     90 	return 1;
     91 }
     92 
     93 static void
     94 ohci_plb_attach(device_t parent, device_t self, void *aux)
     95 {
     96 	struct ohci_softc *sc = device_private(self);
     97 	struct plb_attach_args *paa = aux;
     98 	int error;
     99 
    100 	sc->sc_dev = self;
    101 	sc->sc_bus.ub_hcpriv = sc;
    102 #ifdef PPC4XX_L2CACHE
    103 	/* USB DMA needs software L2 invalidation (hardware snoop misses it). */
    104 	sc->sc_bus.ub_dmatag = ibm4xx_460ex_l2_dmatag();
    105 #else
    106 	sc->sc_bus.ub_dmatag = paa->plb_dmat;
    107 #endif
    108 	sc->sc_bus.ub_revision = USBREV_1_0;
    109 
    110 	ohci_plb_tag.pbs_base = paa->plb_addr;
    111 	ohci_plb_tag.pbs_limit = paa->plb_addr + OHCI_PLB_SIZE;
    112 	sc->iot = &ohci_plb_tag;
    113 
    114 	if (bus_space_init(&ohci_plb_tag, "ohciplb", ohci_ex_storage,
    115 	      sizeof(ohci_ex_storage)) ||
    116 	    bus_space_map(sc->iot, paa->plb_addr, OHCI_PLB_SIZE, 0,
    117 	      &sc->ioh)) {
    118 		aprint_error(": can't map registers\n");
    119 		return;
    120 	}
    121 	sc->sc_size = OHCI_PLB_SIZE;
    122 
    123 	aprint_normal(": OHCI USB controller\n");
    124 
    125 	bus_space_write_4(sc->iot, sc->ioh, OHCI_INTERRUPT_DISABLE,
    126 	    OHCI_ALL_INTRS);
    127 
    128 	intr_establish_xname(paa->plb_irq, IST_LEVEL, IPL_USB, ohci_intr,
    129 	    sc, device_xname(self));
    130 
    131 	error = ohci_init(sc);
    132 	if (error) {
    133 		aprint_error_dev(self, "init failed, error=%d\n", error);
    134 		return;
    135 	}
    136 
    137 	sc->sc_child = config_found(self, &sc->sc_bus, usbctlprint,
    138 	    CFARGS_NONE);
    139 }
    140