1 /* $NetBSD: pq3ehci.c,v 1.3 2011/02/16 18:46:37 matt Exp $ */ 2 /*- 3 * Copyright (c) 2010, 2011 The NetBSD Foundation, Inc. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to The NetBSD Foundation 7 * by Matt Thomas of 3am Software Foundry. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include <sys/cdefs.h> 32 __KERNEL_RCSID(0, "$NetBSD: pq3ehci.c,v 1.3 2011/02/16 18:46:37 matt Exp $"); 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/device.h> 37 #include <sys/kernel.h> 38 #include <sys/proc.h> 39 #include <sys/queue.h> 40 41 #include <sys/bus.h> 42 43 #include <powerpc/booke/cpuvar.h> 44 #include <powerpc/booke/e500var.h> 45 #include <powerpc/booke/e500reg.h> 46 47 #include <dev/usb/usb.h> 48 #include <dev/usb/usbdi.h> 49 #include <dev/usb/usbdivar.h> 50 #include <dev/usb/usb_mem.h> 51 52 #include <dev/usb/ehcireg.h> 53 #include <dev/usb/ehcivar.h> 54 55 #ifdef EHCI_DEBUG 56 #define DPRINTF(x) if (ehcidebug) printf x 57 extern int ehcidebug; 58 #else 59 #define DPRINTF(x) 60 #endif 61 62 static int pq3ehci_match(device_t, cfdata_t, void *); 63 static void pq3ehci_attach(device_t, device_t, void *); 64 65 struct pq3ehci_softc { 66 ehci_softc_t sc; 67 void *sc_ih; /* interrupt vectoring */ 68 }; 69 70 CFATTACH_DECL_NEW(pq3ehci, sizeof(struct pq3ehci_softc), 71 pq3ehci_match, pq3ehci_attach, NULL, NULL); 72 73 static int 74 pq3ehci_match(device_t parent, cfdata_t cf, void *aux) 75 { 76 77 if (!e500_cpunode_submatch(parent, cf, cf->cf_name, aux)) 78 return 0; 79 80 return 1; 81 } 82 83 static void 84 pq3ehci_attach(device_t parent, device_t self, void *aux) 85 { 86 struct cpunode_softc * const psc = device_private(parent); 87 struct pq3ehci_softc * const sc = device_private(self); 88 struct cpunode_attach_args * const cna = aux; 89 struct cpunode_locators * const cnl = &cna->cna_locs; 90 int error; 91 92 psc->sc_children |= cna->cna_childmask; 93 sc->sc.iot = cna->cna_le_memt; /* EHCI registers are little endian */ 94 sc->sc.sc_dev = self; 95 sc->sc.sc_bus.dmatag = cna->cna_dmat; 96 sc->sc.sc_bus.hci_private = sc; 97 sc->sc.sc_bus.usbrev = USBREV_2_0; 98 sc->sc.sc_ncomp = 0; 99 sc->sc.sc_flags |= EHCIF_ETTF; 100 101 aprint_naive(": USB controller\n"); 102 aprint_normal(": USB controller\n"); 103 104 error = bus_space_map(sc->sc.iot, cnl->cnl_addr, cnl->cnl_size, 0, 105 &sc->sc.ioh); 106 if (error) { 107 aprint_error_dev(self, 108 "can't map registers for %s#%u: %d\n", 109 cnl->cnl_name, cnl->cnl_instance, error); 110 return; 111 } 112 sc->sc.sc_size = cnl->cnl_size; 113 114 /* 115 * We need to tell the USB interface to snoop all off RAM starting 116 * at 0. Since it can do it by powers of 2, get the highest RAM 117 * address and roughly round it to the next power of 2 and find 118 * the number of leading zero bits. 119 */ 120 cpu_write_4(cnl->cnl_addr + USB_SNOOP1, 121 SNOOP_2GB - __builtin_clz(curcpu()->ci_softc->cpu_highmem * 2 - 1)); 122 123 sc->sc_ih = intr_establish(cnl->cnl_intrs[0], IPL_USB, IST_ONCHIP, 124 ehci_intr, sc); 125 if (sc->sc_ih == NULL) { 126 aprint_error_dev(self, "failed to establish interrupt %d\n", 127 cnl->cnl_intrs[0]); 128 goto fail; 129 } 130 aprint_normal_dev(self, "interrupting on irq %d\n", 131 cnl->cnl_intrs[0]); 132 133 /* offs is needed for EOWRITEx */ 134 sc->sc.sc_offs = EREAD1(&sc->sc, EHCI_CAPLENGTH); 135 136 /* Disable interrupts, so we don't get any spurious ones. */ 137 DPRINTF(("%s: offs=%d\n", device_xname(self), sc->sc.sc_offs)); 138 EOWRITE2(&sc->sc, EHCI_USBINTR, 0); 139 140 error = ehci_init(&sc->sc); 141 if (error != USBD_NORMAL_COMPLETION) { 142 aprint_error_dev(self, "init failed, error=%d\n", error); 143 goto fail; 144 } 145 146 /* Attach usb device. */ 147 sc->sc.sc_child = config_found(self, &sc->sc.sc_bus, usbctlprint); 148 return; 149 150 fail: 151 if (sc->sc_ih) { 152 intr_disestablish(sc->sc_ih); 153 sc->sc_ih = NULL; 154 } 155 if (sc->sc.sc_size) { 156 bus_space_unmap(sc->sc.iot, sc->sc.ioh, sc->sc.sc_size); 157 sc->sc.sc_size = 0; 158 } 159 return; 160 } 161