1 /* $NetBSD: pq3ehci.c,v 1.8 2016/04/23 10:15:30 skrll 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 1.8 2016/04/23 10:15:30 skrll Exp $"); 33 34 #include "opt_usb.h" 35 36 #include <sys/param.h> 37 #include <sys/systm.h> 38 #include <sys/device.h> 39 #include <sys/kernel.h> 40 #include <sys/proc.h> 41 #include <sys/queue.h> 42 43 #include <sys/bus.h> 44 45 #include <powerpc/booke/cpuvar.h> 46 #include <powerpc/booke/e500var.h> 47 #include <powerpc/booke/e500reg.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 /* 58 * This is relative to the start of the unreserved registers in USB contoller 59 * block and not the full USB block which would be 0x1a8. 60 */ 61 #define PQ3_USBMODE 0xa8 /* USB mode */ 62 #define USBMODE_CM __BITS(0,1) /* Controller Mode */ 63 #define USBMODE_CM_IDLE __SHIFTIN(0,USBMODE_CM) /* Idle (both) */ 64 #define USBMODE_CM_DEVICE __SHIFTIN(2,USBMODE_CM) /* Device Controller */ 65 #define USBMODE_CM_HOST __SHIFTIN(3,USBMODE_CM) /* Host Controller */ 66 67 #ifdef EHCI_DEBUG 68 #define DPRINTF(x) if (ehcidebug) printf x 69 extern int ehcidebug; 70 #else 71 #define DPRINTF(x) 72 #endif 73 74 static int pq3ehci_match(device_t, cfdata_t, void *); 75 static void pq3ehci_attach(device_t, device_t, void *); 76 77 struct pq3ehci_softc { 78 ehci_softc_t sc; 79 void *sc_ih; /* interrupt vectoring */ 80 }; 81 82 static void pq3ehci_init(struct ehci_softc *); 83 84 CFATTACH_DECL_NEW(pq3ehci, sizeof(struct pq3ehci_softc), 85 pq3ehci_match, pq3ehci_attach, NULL, NULL); 86 87 static int 88 pq3ehci_match(device_t parent, cfdata_t cf, void *aux) 89 { 90 91 if (!e500_cpunode_submatch(parent, cf, cf->cf_name, aux)) 92 return 0; 93 94 return 1; 95 } 96 97 static void 98 pq3ehci_attach(device_t parent, device_t self, void *aux) 99 { 100 struct cpunode_softc * const psc = device_private(parent); 101 struct pq3ehci_softc * const sc = device_private(self); 102 struct cpunode_attach_args * const cna = aux; 103 struct cpunode_locators * const cnl = &cna->cna_locs; 104 int error; 105 106 psc->sc_children |= cna->cna_childmask; 107 sc->sc.iot = cna->cna_le_memt; /* EHCI registers are little endian */ 108 sc->sc.sc_dev = self; 109 sc->sc.sc_bus.ub_dmatag = cna->cna_dmat; 110 sc->sc.sc_bus.ub_hcpriv = sc; 111 sc->sc.sc_bus.ub_revision = USBREV_2_0; 112 sc->sc.sc_ncomp = 0; 113 sc->sc.sc_flags |= EHCIF_ETTF; 114 sc->sc.sc_vendor_init = pq3ehci_init; 115 116 aprint_naive(": USB controller\n"); 117 aprint_normal(": USB controller\n"); 118 119 error = bus_space_map(sc->sc.iot, cnl->cnl_addr, cnl->cnl_size, 0, 120 &sc->sc.ioh); 121 if (error) { 122 aprint_error_dev(self, 123 "can't map registers for %s#%u: %d\n", 124 cnl->cnl_name, cnl->cnl_instance, error); 125 return; 126 } 127 sc->sc.sc_size = cnl->cnl_size; 128 129 /* 130 * We need to tell the USB interface to snoop all off RAM starting 131 * at 0. Since it can do it by powers of 2, get the highest RAM 132 * address and roughly round it to the next power of 2 and find 133 * the number of leading zero bits. 134 */ 135 cpu_write_4(cnl->cnl_addr + USB_SNOOP1, 136 SNOOP_2GB - __builtin_clz(curcpu()->ci_softc->cpu_highmem * 2 - 1)); 137 cpu_write_4(cnl->cnl_addr + USB_CONTROL, USB_EN); 138 139 sc->sc_ih = intr_establish(cnl->cnl_intrs[0], IPL_USB, IST_ONCHIP, 140 ehci_intr, sc); 141 if (sc->sc_ih == NULL) { 142 aprint_error_dev(self, "failed to establish interrupt %d\n", 143 cnl->cnl_intrs[0]); 144 goto fail; 145 } 146 aprint_normal_dev(self, "interrupting on irq %d\n", 147 cnl->cnl_intrs[0]); 148 149 /* offs is needed for EOWRITEx */ 150 sc->sc.sc_offs = EREAD1(&sc->sc, EHCI_CAPLENGTH); 151 152 /* Disable interrupts, so we don't get any spurious ones. */ 153 DPRINTF(("%s: offs=%d\n", device_xname(self), sc->sc.sc_offs)); 154 EOWRITE4(&sc->sc, EHCI_USBINTR, 0); 155 156 error = ehci_init(&sc->sc); 157 if (error) { 158 aprint_error_dev(self, "init failed, error=%d\n", error); 159 goto fail; 160 } 161 162 /* Attach usb device. */ 163 sc->sc.sc_child = config_found(self, &sc->sc.sc_bus, usbctlprint); 164 return; 165 166 fail: 167 if (sc->sc_ih) { 168 intr_disestablish(sc->sc_ih); 169 sc->sc_ih = NULL; 170 } 171 if (sc->sc.sc_size) { 172 bus_space_unmap(sc->sc.iot, sc->sc.ioh, sc->sc.sc_size); 173 sc->sc.sc_size = 0; 174 } 175 return; 176 } 177 178 static void 179 pq3ehci_init(struct ehci_softc *hsc) 180 { 181 uint32_t old = bus_space_read_4(hsc->iot, hsc->ioh, PQ3_USBMODE); 182 uint32_t reg = old; 183 184 reg &= ~USBMODE_CM; 185 reg |= USBMODE_CM_HOST; 186 if (reg != old) 187 bus_space_write_4(hsc->iot, hsc->ioh, PQ3_USBMODE, reg); 188 } 189