uhci_pci.c revision 1.38
1/* $NetBSD: uhci_pci.c,v 1.38 2007/11/24 02:13:49 gavan Exp $ */ 2 3/* 4 * Copyright (c) 1998 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@augustsson.net) at 9 * Carlstedt Research & Technology. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40#include <sys/cdefs.h> 41__KERNEL_RCSID(0, "$NetBSD: uhci_pci.c,v 1.38 2007/11/24 02:13:49 gavan Exp $"); 42 43#include "ehci.h" 44 45#include <sys/param.h> 46#include <sys/systm.h> 47#include <sys/kernel.h> 48#include <sys/device.h> 49#include <sys/proc.h> 50#include <sys/queue.h> 51 52#include <sys/bus.h> 53 54#include <dev/pci/pcivar.h> 55#include <dev/pci/usb_pci.h> 56 57#include <dev/usb/usb.h> 58#include <dev/usb/usbdi.h> 59#include <dev/usb/usbdivar.h> 60#include <dev/usb/usb_mem.h> 61 62#include <dev/usb/uhcireg.h> 63#include <dev/usb/uhcivar.h> 64 65static void uhci_pci_powerhook(int, void *); 66 67struct uhci_pci_softc { 68 uhci_softc_t sc; 69#if NEHCI > 0 70 struct usb_pci sc_pci; 71#endif 72 pci_chipset_tag_t sc_pc; 73 pcitag_t sc_tag; 74 void *sc_ih; /* interrupt vectoring */ 75 76 void *sc_powerhook; 77 struct pci_conf_state sc_pciconf; 78}; 79 80static int 81uhci_pci_match(struct device *parent, struct cfdata *match, 82 void *aux) 83{ 84 struct pci_attach_args *pa = (struct pci_attach_args *) aux; 85 86 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_SERIALBUS && 87 PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_SERIALBUS_USB && 88 PCI_INTERFACE(pa->pa_class) == PCI_INTERFACE_UHCI) 89 return (1); 90 91 return (0); 92} 93 94static void 95uhci_pci_attach(struct device *parent, struct device *self, void *aux) 96{ 97 struct uhci_pci_softc *sc = (struct uhci_pci_softc *)self; 98 struct pci_attach_args *pa = (struct pci_attach_args *)aux; 99 pci_chipset_tag_t pc = pa->pa_pc; 100 pcitag_t tag = pa->pa_tag; 101 char const *intrstr; 102 pci_intr_handle_t ih; 103 pcireg_t csr; 104 const char *vendor; 105 const char *devname = sc->sc.sc_bus.bdev.dv_xname; 106 char devinfo[256]; 107 usbd_status r; 108 int s; 109 110 aprint_naive("\n"); 111 112 pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo)); 113 aprint_normal(": %s (rev. 0x%02x)\n", 114 devinfo, PCI_REVISION(pa->pa_class)); 115 116 /* Map I/O registers */ 117 if (pci_mapreg_map(pa, PCI_CBIO, PCI_MAPREG_TYPE_IO, 0, 118 &sc->sc.iot, &sc->sc.ioh, NULL, &sc->sc.sc_size)) { 119 aprint_error("%s: can't map i/o space\n", devname); 120 return; 121 } 122 123 /* 124 * Disable interrupts, so we don't get any spurious ones. 125 * Acknolewdge all pending interrupts. 126 */ 127 bus_space_write_2(sc->sc.iot, sc->sc.ioh, UHCI_INTR, 0); 128 bus_space_write_2(sc->sc.iot, sc->sc.ioh, UHCI_STS, 129 bus_space_read_2(sc->sc.iot, sc->sc.ioh, UHCI_STS)); 130 131 sc->sc_pc = pc; 132 sc->sc_tag = tag; 133 sc->sc.sc_bus.dmatag = pa->pa_dmat; 134 135 /* Enable the device. */ 136 csr = pci_conf_read(pc, tag, PCI_COMMAND_STATUS_REG); 137 pci_conf_write(pc, tag, PCI_COMMAND_STATUS_REG, 138 csr | PCI_COMMAND_MASTER_ENABLE); 139 140 /* Map and establish the interrupt. */ 141 if (pci_intr_map(pa, &ih)) { 142 aprint_error("%s: couldn't map interrupt\n", devname); 143 return; 144 } 145 intrstr = pci_intr_string(pc, ih); 146 sc->sc_ih = pci_intr_establish(pc, ih, IPL_USB, uhci_intr, sc); 147 if (sc->sc_ih == NULL) { 148 aprint_error("%s: couldn't establish interrupt", devname); 149 if (intrstr != NULL) 150 aprint_normal(" at %s", intrstr); 151 aprint_normal("\n"); 152 return; 153 } 154 aprint_normal("%s: interrupting at %s\n", devname, intrstr); 155 156 /* 157 * Set LEGSUP register to its default value. 158 * This can reenable or trigger interrupts, so protect against them 159 * and explicitly disable and ACK them afterwards. 160 */ 161 s = splhardusb(); 162 pci_conf_write(pc, tag, PCI_LEGSUP, PCI_LEGSUP_USBPIRQDEN); 163 bus_space_write_2(sc->sc.iot, sc->sc.ioh, UHCI_INTR, 0); 164 bus_space_write_2(sc->sc.iot, sc->sc.ioh, UHCI_STS, 165 bus_space_read_2(sc->sc.iot, sc->sc.ioh, UHCI_STS)); 166 splx(s); 167 168 switch(pci_conf_read(pc, tag, PCI_USBREV) & PCI_USBREV_MASK) { 169 case PCI_USBREV_PRE_1_0: 170 sc->sc.sc_bus.usbrev = USBREV_PRE_1_0; 171 break; 172 case PCI_USBREV_1_0: 173 sc->sc.sc_bus.usbrev = USBREV_1_0; 174 break; 175 case PCI_USBREV_1_1: 176 sc->sc.sc_bus.usbrev = USBREV_1_1; 177 break; 178 default: 179 sc->sc.sc_bus.usbrev = USBREV_UNKNOWN; 180 break; 181 } 182 183 /* Figure out vendor for root hub descriptor. */ 184 vendor = pci_findvendor(pa->pa_id); 185 sc->sc.sc_id_vendor = PCI_VENDOR(pa->pa_id); 186 if (vendor) 187 strlcpy(sc->sc.sc_vendor, vendor, sizeof(sc->sc.sc_vendor)); 188 else 189 snprintf(sc->sc.sc_vendor, sizeof(sc->sc.sc_vendor), 190 "vendor 0x%04x", PCI_VENDOR(pa->pa_id)); 191 192 /* 193 * Establish our powerhook before uhci_init() does its powerhook. 194 */ 195 sc->sc_powerhook = powerhook_establish(USBDEVNAME(sc->sc.sc_bus.bdev), 196 uhci_pci_powerhook, sc); 197 if (sc->sc_powerhook == NULL) 198 aprint_error("%s: couldn't establish powerhook\n", 199 devname); 200 201 r = uhci_init(&sc->sc); 202 if (r != USBD_NORMAL_COMPLETION) { 203 aprint_error("%s: init failed, error=%d\n", devname, r); 204 return; 205 } 206 207#if NEHCI > 0 208 usb_pci_add(&sc->sc_pci, pa, &sc->sc.sc_bus); 209#endif 210 211 /* Attach usb device. */ 212 sc->sc.sc_child = config_found((void *)sc, &sc->sc.sc_bus, 213 usbctlprint); 214} 215 216static int 217uhci_pci_detach(device_ptr_t self, int flags) 218{ 219 struct uhci_pci_softc *sc = (struct uhci_pci_softc *)self; 220 int rv; 221 222 if (sc->sc_powerhook != NULL) 223 powerhook_disestablish(sc->sc_powerhook); 224 225 rv = uhci_detach(&sc->sc, flags); 226 if (rv) 227 return (rv); 228 if (sc->sc_ih != NULL) { 229 pci_intr_disestablish(sc->sc_pc, sc->sc_ih); 230 sc->sc_ih = NULL; 231 } 232 if (sc->sc.sc_size) { 233 bus_space_unmap(sc->sc.iot, sc->sc.ioh, sc->sc.sc_size); 234 sc->sc.sc_size = 0; 235 } 236#if NEHCI > 0 237 usb_pci_rem(&sc->sc_pci); 238#endif 239 return (0); 240} 241 242static void 243uhci_pci_powerhook(int why, void *opaque) 244{ 245 struct uhci_pci_softc *sc; 246 pci_chipset_tag_t pc; 247 pcitag_t tag; 248 pcireg_t reg; 249 250 sc = (struct uhci_pci_softc *)opaque; 251 pc = sc->sc_pc; 252 tag = sc->sc_tag; 253 254 switch (why) { 255 case PWR_SUSPEND: 256 case PWR_STANDBY: 257 pci_conf_capture(pc, tag, &sc->sc_pciconf); 258 break; 259 case PWR_RESUME: 260 pci_conf_restore(pc, tag, &sc->sc_pciconf); 261 /* the BIOS might change this on us */ 262 reg = pci_conf_read(pc, tag, PCI_LEGSUP); 263 reg |= PCI_LEGSUP_USBPIRQDEN; 264 reg &= ~PCI_LEGSUP_USBSMIEN; 265 pci_conf_write(pc, tag, PCI_LEGSUP, reg); 266 break; 267 } 268 269 return; 270} 271 272CFATTACH_DECL(uhci_pci, sizeof(struct uhci_pci_softc), 273 uhci_pci_match, uhci_pci_attach, uhci_pci_detach, uhci_activate); 274