/* $NetBSD: if_ath_pci.c,v 1.33 2009/05/06 09:25:15 cegger Exp $ */ /*- * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer, * without modification. * 2. Redistributions in binary form must reproduce at minimum a disclaimer * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any * redistribution must be conditioned upon including a substantially * similar Disclaimer requirement for further binary redistribution. * 3. Neither the names of the above-listed copyright holders nor the names * of any contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * Alternatively, this software may be distributed under the terms of the * GNU General Public License ("GPL") version 2 as published by the Free * Software Foundation. * * NO WARRANTY * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF * THE POSSIBILITY OF SUCH DAMAGES. */ #include #ifdef __FreeBSD__ __FBSDID("$FreeBSD: src/sys/dev/ath/if_ath_pci.c,v 1.11 2005/01/18 18:08:16 sam Exp $"); #endif #ifdef __NetBSD__ __KERNEL_RCSID(0, "$NetBSD: if_ath_pci.c,v 1.33 2009/05/06 09:25:15 cegger Exp $"); #endif /* * PCI/Cardbus front-end for the Atheros Wireless LAN controller driver. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef INET #include #endif #include #include #include #include #include #include /* * PCI glue. */ struct ath_pci_softc { struct ath_softc sc_sc; pci_chipset_tag_t sc_pc; pcitag_t sc_pcitag; pci_intr_handle_t sc_pih; void *sc_ih; /* interrupt handler */ bus_space_tag_t sc_iot; bus_space_handle_t sc_ioh; bus_size_t sc_mapsz; }; #define BS_BAR 0x10 static void ath_pci_attach(device_t, device_t, void *); static int ath_pci_detach(device_t, int); static int ath_pci_match(device_t, cfdata_t, void *); static int ath_pci_detach(device_t, int); CFATTACH_DECL_NEW(ath_pci, sizeof(struct ath_pci_softc), ath_pci_match, ath_pci_attach, ath_pci_detach, NULL); static int ath_pci_match(device_t parent, cfdata_t match, void *aux) { const char* devname; struct pci_attach_args *pa = aux; devname = ath_hal_probe(PCI_VENDOR(pa->pa_id), PCI_PRODUCT(pa->pa_id)); if (devname != NULL) return 1; return 0; } static bool ath_pci_suspend(device_t self PMF_FN_ARGS) { struct ath_pci_softc *sc = device_private(self); ath_suspend(&sc->sc_sc); pci_intr_disestablish(sc->sc_pc, sc->sc_ih); sc->sc_ih = NULL; return true; } static bool ath_pci_resume(device_t self PMF_FN_ARGS) { struct ath_pci_softc *sc = device_private(self); sc->sc_ih = pci_intr_establish(sc->sc_pc, sc->sc_pih, IPL_NET, ath_intr, &sc->sc_sc); if (sc->sc_ih == NULL) { aprint_error_dev(self, "couldn't map interrupt\n"); return false; } ath_resume(&sc->sc_sc); return true; } static int ath_pci_setup(struct ath_pci_softc *sc) { pcireg_t bhlc, csr, icr, lattimer; /* * Enable memory mapping and bus mastering. */ csr = pci_conf_read(sc->sc_pc, sc->sc_pcitag, PCI_COMMAND_STATUS_REG); csr |= PCI_COMMAND_MASTER_ENABLE | PCI_COMMAND_MEM_ENABLE; pci_conf_write(sc->sc_pc, sc->sc_pcitag, PCI_COMMAND_STATUS_REG, csr); csr = pci_conf_read(sc->sc_pc, sc->sc_pcitag, PCI_COMMAND_STATUS_REG); if ((csr & PCI_COMMAND_MEM_ENABLE) == 0) { aprint_error("couldn't enable memory mapping\n"); return 0; } if ((csr & PCI_COMMAND_MASTER_ENABLE) == 0) { aprint_error("couldn't enable bus mastering\n"); return 0; } /* * XXX Both this comment and code are replicated in * XXX cardbus_rescan(). * * Make sure the latency timer is set to some reasonable * value. * * I will set the initial value of the Latency Timer here. * * While a PCI device owns the bus, its Latency Timer counts * down bus cycles from its initial value to 0. Minimum * Grant tells for how long the device wants to own the * bus once it gets access, in units of 250ns. * * On a 33 MHz bus, there are 8 cycles per 250ns. So I * multiply the Minimum Grant by 8 to find out the initial * value of the Latency Timer. * * I never set a Latency Timer less than 0x10, since that * is what the old code did. */ bhlc = pci_conf_read(sc->sc_pc, sc->sc_pcitag, PCI_BHLC_REG); icr = pci_conf_read(sc->sc_pc, sc->sc_pcitag, PCI_INTERRUPT_REG); lattimer = MAX(0x10, MIN(0xf8, 8 * PCI_MIN_GNT(icr))); if (PCI_LATTIMER(bhlc) < lattimer) { bhlc &= ~(PCI_LATTIMER_MASK << PCI_LATTIMER_SHIFT); bhlc |= (lattimer << PCI_LATTIMER_SHIFT); pci_conf_write(sc->sc_pc, sc->sc_pcitag, PCI_BHLC_REG, bhlc); } return 1; } static void ath_pci_attach(device_t parent, device_t self, void *aux) { struct ath_pci_softc *psc = device_private(self); struct ath_softc *sc = &psc->sc_sc; struct pci_attach_args *pa = aux; pci_chipset_tag_t pc = pa->pa_pc; pcireg_t mem_type; const char *intrstr = NULL; sc->sc_dev = self; psc->sc_pc = pc; psc->sc_pcitag = pa->pa_tag; if (!ath_pci_setup(psc)) goto bad; /* * Setup memory-mapping of PCI registers. */ mem_type = pci_mapreg_type(pc, pa->pa_tag, BS_BAR); if (mem_type != PCI_MAPREG_TYPE_MEM && mem_type != PCI_MAPREG_MEM_TYPE_64BIT) { aprint_error("bad pci register type %d\n", (int)mem_type); goto bad; } if (pci_mapreg_map(pa, BS_BAR, mem_type, 0, &psc->sc_iot, &psc->sc_ioh, NULL, &psc->sc_mapsz)) { aprint_error("cannot map register space\n"); goto bad; } sc->sc_st = HALTAG(psc->sc_iot); sc->sc_sh = HALHANDLE(psc->sc_ioh); /* * Arrange interrupt line. */ if (pci_intr_map(pa, &psc->sc_pih)) { aprint_error("couldn't map interrupt\n"); goto bad1; } intrstr = pci_intr_string(pc, psc->sc_pih); psc->sc_ih = pci_intr_establish(pc, psc->sc_pih, IPL_NET, ath_intr, sc); if (psc->sc_ih == NULL) { aprint_error("couldn't map interrupt\n"); goto bad2; } aprint_normal("\n"); aprint_verbose_dev(self, "interrupting at %s\n", intrstr); sc->sc_dmat = pa->pa_dmat; ATH_LOCK_INIT(sc); if (ath_attach(PCI_PRODUCT(pa->pa_id), sc) != 0) goto bad3; if (!pmf_device_register(self, ath_pci_suspend, ath_pci_resume)) aprint_error_dev(self, "couldn't establish power handler\n"); else { pmf_class_network_register(self, &sc->sc_if); pmf_device_suspend_self(self); } return; bad3: ATH_LOCK_DESTROY(sc); pci_intr_disestablish(pc, psc->sc_ih); bad2: /* XXX */ bad1: bus_space_unmap(psc->sc_iot, psc->sc_ioh, psc->sc_mapsz); bad: /* XXX */ return; } static int ath_pci_detach(device_t self, int flags) { struct ath_pci_softc *psc = device_private(self); ath_detach(&psc->sc_sc); pmf_device_deregister(self); if (psc->sc_ih != NULL) pci_intr_disestablish(psc->sc_pc, psc->sc_ih); bus_space_unmap(psc->sc_iot, psc->sc_ioh, psc->sc_mapsz); ATH_LOCK_DESTROY(&psc->sc_sc); return (0); }