1 /* $NetBSD: uhci_pci.c,v 1.60 2016/04/23 10:15:31 skrll 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 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __KERNEL_RCSID(0, "$NetBSD: uhci_pci.c,v 1.60 2016/04/23 10:15:31 skrll Exp $"); 35 36 #include "ehci.h" 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/kernel.h> 41 #include <sys/device.h> 42 #include <sys/proc.h> 43 #include <sys/queue.h> 44 45 #include <sys/bus.h> 46 47 #include <dev/pci/pcivar.h> 48 #include <dev/pci/usb_pci.h> 49 50 #include <dev/usb/usb.h> 51 #include <dev/usb/usbdi.h> 52 #include <dev/usb/usbdivar.h> 53 #include <dev/usb/usb_mem.h> 54 55 #include <dev/usb/uhcireg.h> 56 #include <dev/usb/uhcivar.h> 57 58 static bool uhci_pci_resume(device_t, const pmf_qual_t *); 59 60 struct uhci_pci_softc { 61 uhci_softc_t sc; 62 #if NEHCI > 0 63 struct usb_pci sc_pci; 64 #endif 65 pci_chipset_tag_t sc_pc; 66 pcitag_t sc_tag; 67 void *sc_ih; /* interrupt vectoring */ 68 unsigned sc_initialized; 69 #define SC_INIT_UHCI 1 70 #define SC_INIT_PMF 2 71 }; 72 73 static int 74 uhci_pci_match(device_t parent, cfdata_t match, void *aux) 75 { 76 struct pci_attach_args *pa = (struct pci_attach_args *) aux; 77 78 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_SERIALBUS && 79 PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_SERIALBUS_USB && 80 PCI_INTERFACE(pa->pa_class) == PCI_INTERFACE_UHCI) 81 return 1; 82 83 return 0; 84 } 85 86 static void 87 uhci_pci_attach(device_t parent, device_t self, void *aux) 88 { 89 struct uhci_pci_softc *sc = device_private(self); 90 struct pci_attach_args *pa = (struct pci_attach_args *)aux; 91 pci_chipset_tag_t pc = pa->pa_pc; 92 pcitag_t tag = pa->pa_tag; 93 char const *intrstr; 94 pci_intr_handle_t ih; 95 pcireg_t csr; 96 int s; 97 char intrbuf[PCI_INTRSTR_LEN]; 98 99 sc->sc.sc_dev = self; 100 sc->sc.sc_bus.ub_hcpriv = sc; 101 102 pci_aprint_devinfo(pa, NULL); 103 104 /* Map I/O registers */ 105 if (pci_mapreg_map(pa, PCI_CBIO, PCI_MAPREG_TYPE_IO, 0, 106 &sc->sc.iot, &sc->sc.ioh, NULL, &sc->sc.sc_size)) { 107 aprint_error_dev(self, "can't map i/o space\n"); 108 return; 109 } 110 111 /* 112 * Disable interrupts, so we don't get any spurious ones. 113 * Acknowledge all pending interrupts. 114 */ 115 bus_space_write_2(sc->sc.iot, sc->sc.ioh, UHCI_INTR, 0); 116 bus_space_write_2(sc->sc.iot, sc->sc.ioh, UHCI_STS, 117 bus_space_read_2(sc->sc.iot, sc->sc.ioh, UHCI_STS)); 118 119 sc->sc_pc = pc; 120 sc->sc_tag = tag; 121 sc->sc.sc_bus.ub_dmatag = pa->pa_dmat; 122 123 /* Enable the device. */ 124 csr = pci_conf_read(pc, tag, PCI_COMMAND_STATUS_REG); 125 pci_conf_write(pc, tag, PCI_COMMAND_STATUS_REG, 126 csr | PCI_COMMAND_MASTER_ENABLE); 127 128 /* Map and establish the interrupt. */ 129 if (pci_intr_map(pa, &ih)) { 130 aprint_error_dev(self, "couldn't map interrupt\n"); 131 return; 132 } 133 intrstr = pci_intr_string(pc, ih, intrbuf, sizeof(intrbuf)); 134 sc->sc_ih = pci_intr_establish(pc, ih, IPL_USB, uhci_intr, sc); 135 if (sc->sc_ih == NULL) { 136 aprint_error_dev(self, "couldn't establish interrupt"); 137 if (intrstr != NULL) 138 aprint_error(" at %s", intrstr); 139 aprint_error("\n"); 140 return; 141 } 142 aprint_normal_dev(self, "interrupting at %s\n", intrstr); 143 144 /* 145 * Set LEGSUP register to its default value. 146 * This can re-enable or trigger interrupts, so protect against 147 * them and explicitly disable and ACK them afterwards. 148 */ 149 s = splhardusb(); 150 pci_conf_write(pc, tag, PCI_LEGSUP, PCI_LEGSUP_USBPIRQDEN); 151 bus_space_write_2(sc->sc.iot, sc->sc.ioh, UHCI_INTR, 0); 152 bus_space_write_2(sc->sc.iot, sc->sc.ioh, UHCI_STS, 153 bus_space_read_2(sc->sc.iot, sc->sc.ioh, UHCI_STS)); 154 splx(s); 155 156 switch(pci_conf_read(pc, tag, PCI_USBREV) & PCI_USBREV_MASK) { 157 case PCI_USBREV_PRE_1_0: 158 sc->sc.sc_bus.ub_revision = USBREV_PRE_1_0; 159 break; 160 case PCI_USBREV_1_0: 161 sc->sc.sc_bus.ub_revision = USBREV_1_0; 162 break; 163 case PCI_USBREV_1_1: 164 sc->sc.sc_bus.ub_revision = USBREV_1_1; 165 break; 166 default: 167 sc->sc.sc_bus.ub_revision = USBREV_UNKNOWN; 168 break; 169 } 170 171 /* Figure out vendor for root hub descriptor. */ 172 sc->sc.sc_id_vendor = PCI_VENDOR(pa->pa_id); 173 pci_findvendor(sc->sc.sc_vendor, sizeof(sc->sc.sc_vendor), 174 sc->sc.sc_id_vendor); 175 int err = uhci_init(&sc->sc); 176 if (err) { 177 aprint_error_dev(self, "init failed, error=%d\n", err); 178 return; 179 } 180 sc->sc_initialized = SC_INIT_UHCI; 181 182 #if NEHCI > 0 183 usb_pci_add(&sc->sc_pci, pa, self); 184 #endif 185 186 if (!pmf_device_register(self, uhci_suspend, uhci_pci_resume)) 187 aprint_error_dev(self, "couldn't establish power handler\n"); 188 else 189 sc->sc_initialized |= SC_INIT_PMF; 190 191 /* Attach usb device. */ 192 sc->sc.sc_child = config_found(self, &sc->sc.sc_bus, usbctlprint); 193 } 194 195 static int 196 uhci_pci_detach(device_t self, int flags) 197 { 198 struct uhci_pci_softc *sc = device_private(self); 199 int rv; 200 201 if (sc->sc_initialized & SC_INIT_UHCI) { 202 rv = uhci_detach(&sc->sc, flags); 203 if (rv) 204 return rv; 205 } 206 207 if (sc->sc_initialized & SC_INIT_PMF) 208 pmf_device_deregister(self); 209 210 /* disable interrupts and acknowledge any pending */ 211 bus_space_write_2(sc->sc.iot, sc->sc.ioh, UHCI_INTR, 0); 212 bus_space_write_2(sc->sc.iot, sc->sc.ioh, UHCI_STS, 213 bus_space_read_2(sc->sc.iot, sc->sc.ioh, UHCI_STS)); 214 215 if (sc->sc_ih != NULL) { 216 pci_intr_disestablish(sc->sc_pc, sc->sc_ih); 217 sc->sc_ih = NULL; 218 } 219 if (sc->sc.sc_size) { 220 bus_space_unmap(sc->sc.iot, sc->sc.ioh, sc->sc.sc_size); 221 sc->sc.sc_size = 0; 222 } 223 #if NEHCI > 0 224 usb_pci_rem(&sc->sc_pci); 225 #endif 226 return 0; 227 } 228 229 static bool 230 uhci_pci_resume(device_t dv, const pmf_qual_t *qual) 231 { 232 struct uhci_pci_softc *sc = device_private(dv); 233 234 /* Set LEGSUP register to its default value. */ 235 pci_conf_write(sc->sc_pc, sc->sc_tag, PCI_LEGSUP, 236 PCI_LEGSUP_USBPIRQDEN); 237 238 return uhci_resume(dv, qual); 239 } 240 241 CFATTACH_DECL3_NEW(uhci_pci, sizeof(struct uhci_pci_softc), 242 uhci_pci_match, uhci_pci_attach, uhci_pci_detach, uhci_activate, 243 NULL, uhci_childdet, DVF_DETACH_SHUTDOWN); 244