ehci_pci.c revision 1.29.2.4
1 /* $NetBSD: ehci_pci.c,v 1.29.2.4 2007/10/01 05:37:36 joerg Exp $ */ 2 3 /* 4 * Copyright (c) 2001, 2002 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 (at) augustsson.net). 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: ehci_pci.c,v 1.29.2.4 2007/10/01 05:37:36 joerg Exp $"); 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/kernel.h> 45 #include <sys/device.h> 46 #include <sys/proc.h> 47 #include <sys/queue.h> 48 49 #include <machine/bus.h> 50 51 #include <dev/pci/pcidevs.h> 52 #include <dev/pci/pcivar.h> 53 #include <dev/pci/usb_pci.h> 54 55 #include <dev/usb/usb.h> 56 #include <dev/usb/usbdi.h> 57 #include <dev/usb/usbdivar.h> 58 #include <dev/usb/usb_mem.h> 59 60 #include <dev/usb/ehcireg.h> 61 #include <dev/usb/ehcivar.h> 62 63 #ifdef EHCI_DEBUG 64 #define DPRINTF(x) if (ehcidebug) printf x 65 extern int ehcidebug; 66 #else 67 #define DPRINTF(x) 68 #endif 69 70 static void ehci_get_ownership(ehci_softc_t *sc, pci_chipset_tag_t pc, 71 pcitag_t tag); 72 static void ehci_pci_resume(device_t); 73 74 struct ehci_pci_softc { 75 ehci_softc_t sc; 76 pci_chipset_tag_t sc_pc; 77 pcitag_t sc_tag; 78 void *sc_ih; /* interrupt vectoring */ 79 }; 80 81 #define EHCI_MAX_BIOS_WAIT 1000 /* ms */ 82 83 static int 84 ehci_pci_match(struct device *parent, struct cfdata *match, 85 void *aux) 86 { 87 struct pci_attach_args *pa = (struct pci_attach_args *) aux; 88 89 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_SERIALBUS && 90 PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_SERIALBUS_USB && 91 PCI_INTERFACE(pa->pa_class) == PCI_INTERFACE_EHCI) 92 return (1); 93 94 return (0); 95 } 96 97 static void 98 ehci_pci_attach(struct device *parent, struct device *self, void *aux) 99 { 100 struct ehci_pci_softc *sc = (struct ehci_pci_softc *)self; 101 struct pci_attach_args *pa = (struct pci_attach_args *)aux; 102 pci_chipset_tag_t pc = pa->pa_pc; 103 pcitag_t tag = pa->pa_tag; 104 pnp_status_t status; 105 char const *intrstr; 106 pci_intr_handle_t ih; 107 pcireg_t csr; 108 const char *vendor; 109 const char *devname = sc->sc.sc_bus.bdev.dv_xname; 110 char devinfo[256]; 111 usbd_status r; 112 int ncomp; 113 struct usb_pci *up; 114 115 aprint_naive(": USB controller\n"); 116 117 pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo)); 118 aprint_normal(": %s (rev. 0x%02x)\n", devinfo, 119 PCI_REVISION(pa->pa_class)); 120 121 /* Map I/O registers */ 122 if (pci_mapreg_map(pa, PCI_CBMEM, PCI_MAPREG_TYPE_MEM, 0, 123 &sc->sc.iot, &sc->sc.ioh, NULL, &sc->sc.sc_size)) { 124 aprint_error("%s: can't map memory space\n", devname); 125 return; 126 } 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 /* Disable interrupts, so we don't get any spurious ones. */ 138 sc->sc.sc_offs = EREAD1(&sc->sc, EHCI_CAPLENGTH); 139 DPRINTF(("%s: offs=%d\n", devname, sc->sc.sc_offs)); 140 EOWRITE2(&sc->sc, EHCI_USBINTR, 0); 141 142 /* Map and establish the interrupt. */ 143 if (pci_intr_map(pa, &ih)) { 144 aprint_error("%s: couldn't map interrupt\n", devname); 145 return; 146 } 147 intrstr = pci_intr_string(pc, ih); 148 sc->sc_ih = pci_intr_establish(pc, ih, IPL_USB, ehci_intr, sc); 149 if (sc->sc_ih == NULL) { 150 aprint_error("%s: couldn't establish interrupt", devname); 151 if (intrstr != NULL) 152 aprint_normal(" at %s", intrstr); 153 aprint_normal("\n"); 154 return; 155 } 156 aprint_normal("%s: interrupting at %s\n", devname, intrstr); 157 158 switch(pci_conf_read(pc, tag, PCI_USBREV) & PCI_USBREV_MASK) { 159 case PCI_USBREV_PRE_1_0: 160 case PCI_USBREV_1_0: 161 case PCI_USBREV_1_1: 162 sc->sc.sc_bus.usbrev = USBREV_UNKNOWN; 163 aprint_verbose("%s: pre-2.0 USB rev\n", devname); 164 return; 165 case PCI_USBREV_2_0: 166 sc->sc.sc_bus.usbrev = USBREV_2_0; 167 break; 168 default: 169 sc->sc.sc_bus.usbrev = USBREV_UNKNOWN; 170 break; 171 } 172 173 /* Figure out vendor for root hub descriptor. */ 174 vendor = pci_findvendor(pa->pa_id); 175 sc->sc.sc_id_vendor = PCI_VENDOR(pa->pa_id); 176 if (vendor) 177 strlcpy(sc->sc.sc_vendor, vendor, sizeof(sc->sc.sc_vendor)); 178 else 179 snprintf(sc->sc.sc_vendor, sizeof(sc->sc.sc_vendor), 180 "vendor 0x%04x", PCI_VENDOR(pa->pa_id)); 181 182 /* Enable workaround for dropped interrupts as required */ 183 switch (sc->sc.sc_id_vendor) { 184 case PCI_VENDOR_ATI: 185 case PCI_VENDOR_VIATECH: 186 sc->sc.sc_flags |= EHCIF_DROPPED_INTR_WORKAROUND; 187 aprint_normal("%s: dropped intr workaround enabled\n", devname); 188 break; 189 default: 190 break; 191 } 192 193 /* 194 * Find companion controllers. According to the spec they always 195 * have lower function numbers so they should be enumerated already. 196 */ 197 ncomp = 0; 198 TAILQ_FOREACH(up, &ehci_pci_alldevs, next) { 199 if (up->bus == pa->pa_bus && up->device == pa->pa_device) { 200 DPRINTF(("ehci_pci_attach: companion %s\n", 201 USBDEVNAME(up->usb->bdev))); 202 sc->sc.sc_comps[ncomp++] = up->usb; 203 if (ncomp >= EHCI_COMPANION_MAX) 204 break; 205 } 206 } 207 sc->sc.sc_ncomp = ncomp; 208 209 ehci_get_ownership(&sc->sc, pc, tag); 210 211 r = ehci_init(&sc->sc); 212 if (r != USBD_NORMAL_COMPLETION) { 213 aprint_error("%s: init failed, error=%d\n", devname, r); 214 return; 215 } 216 217 status = pci_generic_power_register(self, pa->pa_pc, pa->pa_tag, 218 ehci_suspend, ehci_pci_resume); 219 if (status != PNP_STATUS_SUCCESS) { 220 aprint_error("%s: couldn't establish power handler\n", 221 device_xname(self)); 222 } 223 224 /* Attach usb device. */ 225 sc->sc.sc_child = config_found((void *)sc, &sc->sc.sc_bus, 226 usbctlprint); 227 } 228 229 static int 230 ehci_pci_detach(device_ptr_t self, int flags) 231 { 232 struct ehci_pci_softc *sc = (struct ehci_pci_softc *)self; 233 int rv; 234 235 pci_generic_power_deregister(self); 236 rv = ehci_detach(&sc->sc, flags); 237 if (rv) 238 return (rv); 239 if (sc->sc_ih != NULL) { 240 pci_intr_disestablish(sc->sc_pc, sc->sc_ih); 241 sc->sc_ih = NULL; 242 } 243 if (sc->sc.sc_size) { 244 bus_space_unmap(sc->sc.iot, sc->sc.ioh, sc->sc.sc_size); 245 sc->sc.sc_size = 0; 246 } 247 return (0); 248 } 249 250 CFATTACH_DECL(ehci_pci, sizeof(struct ehci_pci_softc), 251 ehci_pci_match, ehci_pci_attach, ehci_pci_detach, ehci_activate); 252 253 #ifdef EHCI_DEBUG 254 static void 255 ehci_dump_caps(ehci_softc_t *sc, pci_chipset_tag_t pc, pcitag_t tag) 256 { 257 u_int32_t cparams, legctlsts, addr, cap, id; 258 int maxdump = 10; 259 260 cparams = EREAD4(sc, EHCI_HCCPARAMS); 261 addr = EHCI_HCC_EECP(cparams); 262 while (addr != 0) { 263 cap = pci_conf_read(pc, tag, addr); 264 id = EHCI_CAP_GET_ID(cap); 265 switch (id) { 266 case EHCI_CAP_ID_LEGACY: 267 legctlsts = pci_conf_read(pc, tag, 268 addr + PCI_EHCI_USBLEGCTLSTS); 269 printf("ehci_dump_caps: legsup=0x%08x " 270 "legctlsts=0x%08x\n", cap, legctlsts); 271 break; 272 default: 273 printf("ehci_dump_caps: cap=0x%08x\n", cap); 274 break; 275 } 276 if (--maxdump < 0) 277 break; 278 addr = EHCI_CAP_GET_NEXT(cap); 279 } 280 } 281 #endif 282 283 static void 284 ehci_get_ownership(ehci_softc_t *sc, pci_chipset_tag_t pc, pcitag_t tag) 285 { 286 const char *devname = sc->sc_bus.bdev.dv_xname; 287 u_int32_t cparams, addr, cap, legsup; 288 int maxcap = 10; 289 int ms; 290 291 #ifdef EHCI_DEBUG 292 if (ehcidebug) 293 ehci_dump_caps(sc, pc, tag); 294 #endif 295 cparams = EREAD4(sc, EHCI_HCCPARAMS); 296 addr = EHCI_HCC_EECP(cparams); 297 while (addr != 0) { 298 cap = pci_conf_read(pc, tag, addr); 299 if (EHCI_CAP_GET_ID(cap) == EHCI_CAP_ID_LEGACY) 300 break; 301 if (--maxcap < 0) { 302 aprint_normal("%s: broken extended capabilities " 303 "ignored\n", devname); 304 return; 305 } 306 addr = EHCI_CAP_GET_NEXT(cap); 307 } 308 309 /* If the USB legacy capability is not specified, we are done */ 310 if (addr == 0) 311 return; 312 313 legsup = pci_conf_read(pc, tag, addr + PCI_EHCI_USBLEGSUP); 314 /* Ask BIOS to give up ownership */ 315 legsup |= EHCI_LEG_HC_OS_OWNED; 316 pci_conf_write(pc, tag, addr + PCI_EHCI_USBLEGSUP, legsup); 317 for (ms = 0; ms < EHCI_MAX_BIOS_WAIT; ms++) { 318 legsup = pci_conf_read(pc, tag, addr + PCI_EHCI_USBLEGSUP); 319 if (!(legsup & EHCI_LEG_HC_BIOS_OWNED)) 320 break; 321 delay(1000); 322 } 323 if (ms == EHCI_MAX_BIOS_WAIT) { 324 aprint_normal("%s: BIOS refuses to give up ownership, " 325 "using force\n", devname); 326 pci_conf_write(pc, tag, addr + PCI_EHCI_USBLEGSUP, 0); 327 pci_conf_write(pc, tag, addr + PCI_EHCI_USBLEGCTLSTS, 0); 328 } else { 329 aprint_verbose("%s: BIOS has given up ownership\n", devname); 330 } 331 } 332 333 static void 334 ehci_pci_resume(device_t dv) 335 { 336 struct ehci_pci_softc *sc = device_private(dv); 337 338 ehci_get_ownership(&sc->sc, sc->sc_pc, sc->sc_tag); 339 ehci_resume(dv); 340 } 341
Indexes created Sat Oct 11 14:09:46 GMT 2025