1 /* $NetBSD: uhci_pci.c,v 1.40 2007/12/09 20:28:13 jmcneill 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 1.40 2007/12/09 20:28:13 jmcneill 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 65 static bool uhci_pci_resume(device_t); 66 67 struct 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 77 static int 78 uhci_pci_match(struct device *parent, struct cfdata *match, 79 void *aux) 80 { 81 struct pci_attach_args *pa = (struct pci_attach_args *) aux; 82 83 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_SERIALBUS && 84 PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_SERIALBUS_USB && 85 PCI_INTERFACE(pa->pa_class) == PCI_INTERFACE_UHCI) 86 return (1); 87 88 return (0); 89 } 90 91 static void 92 uhci_pci_attach(struct device *parent, struct device *self, void *aux) 93 { 94 struct uhci_pci_softc *sc = (struct uhci_pci_softc *)self; 95 struct pci_attach_args *pa = (struct pci_attach_args *)aux; 96 pci_chipset_tag_t pc = pa->pa_pc; 97 pcitag_t tag = pa->pa_tag; 98 char const *intrstr; 99 pci_intr_handle_t ih; 100 pcireg_t csr; 101 const char *vendor; 102 const char *devname = sc->sc.sc_bus.bdev.dv_xname; 103 char devinfo[256]; 104 usbd_status r; 105 int s; 106 107 aprint_naive("\n"); 108 109 pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo)); 110 aprint_normal(": %s (rev. 0x%02x)\n", 111 devinfo, PCI_REVISION(pa->pa_class)); 112 113 /* Map I/O registers */ 114 if (pci_mapreg_map(pa, PCI_CBIO, PCI_MAPREG_TYPE_IO, 0, 115 &sc->sc.iot, &sc->sc.ioh, NULL, &sc->sc.sc_size)) { 116 aprint_error("%s: can't map i/o space\n", devname); 117 return; 118 } 119 120 /* 121 * Disable interrupts, so we don't get any spurious ones. 122 * Acknowledge all pending interrupts. 123 */ 124 bus_space_write_2(sc->sc.iot, sc->sc.ioh, UHCI_INTR, 0); 125 bus_space_write_2(sc->sc.iot, sc->sc.ioh, UHCI_STS, 126 bus_space_read_2(sc->sc.iot, sc->sc.ioh, UHCI_STS)); 127 128 sc->sc_pc = pc; 129 sc->sc_tag = tag; 130 sc->sc.sc_bus.dmatag = pa->pa_dmat; 131 132 /* Enable the device. */ 133 csr = pci_conf_read(pc, tag, PCI_COMMAND_STATUS_REG); 134 pci_conf_write(pc, tag, PCI_COMMAND_STATUS_REG, 135 csr | PCI_COMMAND_MASTER_ENABLE); 136 137 /* Map and establish the interrupt. */ 138 if (pci_intr_map(pa, &ih)) { 139 aprint_error("%s: couldn't map interrupt\n", devname); 140 return; 141 } 142 intrstr = pci_intr_string(pc, ih); 143 sc->sc_ih = pci_intr_establish(pc, ih, IPL_USB, uhci_intr, sc); 144 if (sc->sc_ih == NULL) { 145 aprint_error("%s: couldn't establish interrupt", devname); 146 if (intrstr != NULL) 147 aprint_normal(" at %s", intrstr); 148 aprint_normal("\n"); 149 return; 150 } 151 aprint_normal("%s: interrupting at %s\n", devname, intrstr); 152 153 /* 154 * Set LEGSUP register to its default value. 155 * This can re-enable or trigger interrupts, so protect against 156 * them and explicitly disable and ACK them afterwards. 157 */ 158 s = splhardusb(); 159 pci_conf_write(pc, tag, PCI_LEGSUP, PCI_LEGSUP_USBPIRQDEN); 160 bus_space_write_2(sc->sc.iot, sc->sc.ioh, UHCI_INTR, 0); 161 bus_space_write_2(sc->sc.iot, sc->sc.ioh, UHCI_STS, 162 bus_space_read_2(sc->sc.iot, sc->sc.ioh, UHCI_STS)); 163 splx(s); 164 165 switch(pci_conf_read(pc, tag, PCI_USBREV) & PCI_USBREV_MASK) { 166 case PCI_USBREV_PRE_1_0: 167 sc->sc.sc_bus.usbrev = USBREV_PRE_1_0; 168 break; 169 case PCI_USBREV_1_0: 170 sc->sc.sc_bus.usbrev = USBREV_1_0; 171 break; 172 case PCI_USBREV_1_1: 173 sc->sc.sc_bus.usbrev = USBREV_1_1; 174 break; 175 default: 176 sc->sc.sc_bus.usbrev = USBREV_UNKNOWN; 177 break; 178 } 179 180 /* Figure out vendor for root hub descriptor. */ 181 vendor = pci_findvendor(pa->pa_id); 182 sc->sc.sc_id_vendor = PCI_VENDOR(pa->pa_id); 183 if (vendor) 184 strlcpy(sc->sc.sc_vendor, vendor, sizeof(sc->sc.sc_vendor)); 185 else 186 snprintf(sc->sc.sc_vendor, sizeof(sc->sc.sc_vendor), 187 "vendor 0x%04x", PCI_VENDOR(pa->pa_id)); 188 189 r = uhci_init(&sc->sc); 190 if (r != USBD_NORMAL_COMPLETION) { 191 aprint_error("%s: init failed, error=%d\n", devname, r); 192 return; 193 } 194 195 #if NEHCI > 0 196 usb_pci_add(&sc->sc_pci, pa, &sc->sc.sc_bus); 197 #endif 198 199 if (!pmf_device_register(self, uhci_suspend, uhci_pci_resume)) 200 aprint_error_dev(self, "couldn't establish power handler\n"); 201 202 /* Attach usb device. */ 203 sc->sc.sc_child = config_found((void *)sc, &sc->sc.sc_bus, 204 usbctlprint); 205 } 206 207 static int 208 uhci_pci_detach(device_ptr_t self, int flags) 209 { 210 struct uhci_pci_softc *sc = (struct uhci_pci_softc *)self; 211 int rv; 212 213 pmf_device_deregister(self); 214 215 rv = uhci_detach(&sc->sc, flags); 216 if (rv) 217 return (rv); 218 if (sc->sc_ih != NULL) { 219 pci_intr_disestablish(sc->sc_pc, sc->sc_ih); 220 sc->sc_ih = NULL; 221 } 222 if (sc->sc.sc_size) { 223 bus_space_unmap(sc->sc.iot, sc->sc.ioh, sc->sc.sc_size); 224 sc->sc.sc_size = 0; 225 } 226 #if NEHCI > 0 227 usb_pci_rem(&sc->sc_pci); 228 #endif 229 return (0); 230 } 231 232 static bool 233 uhci_pci_resume(device_t dv) 234 { 235 struct uhci_pci_softc *sc = device_private(dv); 236 237 /* Set LEGSUP register to its default value. */ 238 pci_conf_write(sc->sc_pc, sc->sc_tag, PCI_LEGSUP, 239 PCI_LEGSUP_USBPIRQDEN); 240 241 return uhci_resume(dv); 242 } 243 244 CFATTACH_DECL(uhci_pci, sizeof(struct uhci_pci_softc), 245 uhci_pci_match, uhci_pci_attach, uhci_pci_detach, uhci_activate); 246