/*- * Copyright (c) 2002-2008 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. * * 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. * * $FreeBSD: head/sys/dev/ath/if_ath_pci.c 192147 2009-05-15 17:02:11Z imp $ */ /* * PCI/Cardbus front-end for the Atheros Wireless LAN controller driver. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* * PCI glue. */ struct ath_pci_softc { struct ath_softc sc_sc; struct resource *sc_sr; /* memory resource */ struct resource *sc_irq; /* irq resource */ void *sc_ih; /* interrupt handler */ }; #define BS_BAR 0x10 #define PCIR_RETRY_TIMEOUT 0x41 static int ath_pci_probe(device_t dev) { const char* devname; wlan_serialize_enter(); devname = ath_hal_probe(pci_get_vendor(dev), pci_get_device(dev)); if (devname != NULL) { device_set_desc(dev, devname); wlan_serialize_exit(); return BUS_PROBE_DEFAULT; } wlan_serialize_exit(); return ENXIO; } static int ath_pci_attach(device_t dev) { struct ath_pci_softc *psc = device_get_softc(dev); struct ath_softc *sc = &psc->sc_sc; int error = ENXIO; int rid; wlan_serialize_enter(); sc->sc_dev = dev; /* * Enable bus mastering. */ pci_enable_busmaster(dev); /* * Disable retry timeout to keep PCI Tx retries from * interfering with C3 CPU state. */ pci_write_config(dev, PCIR_RETRY_TIMEOUT, 0, 1); /* * Setup memory-mapping of PCI registers. */ rid = BS_BAR; psc->sc_sr = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE); if (psc->sc_sr == NULL) { device_printf(dev, "cannot map register space\n"); goto bad; } /* XXX uintptr_t is a bandaid for ia64; to be fixed */ sc->sc_st = (HAL_BUS_TAG)(uintptr_t) rman_get_bustag(psc->sc_sr); sc->sc_sh = (HAL_BUS_HANDLE) rman_get_bushandle(psc->sc_sr); /* * Mark device invalid so any interrupts (shared or otherwise) * that arrive before the HAL is setup are discarded. */ sc->sc_invalid = 1; /* * Arrange interrupt line. */ rid = 0; psc->sc_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_SHAREABLE|RF_ACTIVE); if (psc->sc_irq == NULL) { device_printf(dev, "could not map interrupt\n"); goto bad1; } if (bus_setup_intr(dev, psc->sc_irq, INTR_MPSAFE, ath_intr, sc, &psc->sc_ih, &wlan_global_serializer)) { device_printf(dev, "could not establish interrupt\n"); goto bad2; } /* * Setup DMA descriptor area. */ if (bus_dma_tag_create(sc->sc_dmat, /* parent */ 4, 0, /* alignment, bounds */ BUS_SPACE_MAXADDR_32BIT, /* lowaddr */ BUS_SPACE_MAXADDR, /* highaddr */ NULL, NULL, /* filter, filterarg */ 0x3ffff, /* maxsize XXX */ ATH_MAX_SCATTER, /* nsegments */ 0x3ffff, /* maxsegsize XXX */ BUS_DMA_ALLOCNOW, /* flags */ &sc->sc_dmat)) { device_printf(dev, "cannot allocate DMA tag\n"); goto bad3; } error = ath_attach(pci_get_device(dev), sc); if (error == 0) { /* success */ wlan_serialize_exit(); return 0; } bus_dma_tag_destroy(sc->sc_dmat); bad3: bus_teardown_intr(dev, psc->sc_irq, psc->sc_ih); bad2: bus_release_resource(dev, SYS_RES_IRQ, 0, psc->sc_irq); bad1: bus_release_resource(dev, SYS_RES_MEMORY, BS_BAR, psc->sc_sr); bad: wlan_serialize_exit(); return (error); } static int ath_pci_detach(device_t dev) { struct ath_pci_softc *psc = device_get_softc(dev); struct ath_softc *sc = &psc->sc_sc; wlan_serialize_enter(); /* check if device was removed */ sc->sc_invalid = !bus_child_present(dev); ath_detach(sc); bus_generic_detach(dev); bus_teardown_intr(dev, psc->sc_irq, psc->sc_ih); bus_release_resource(dev, SYS_RES_IRQ, 0, psc->sc_irq); bus_dma_tag_destroy(sc->sc_dmat); bus_release_resource(dev, SYS_RES_MEMORY, BS_BAR, psc->sc_sr); wlan_serialize_exit(); return (0); } static int ath_pci_shutdown(device_t dev) { struct ath_pci_softc *psc = device_get_softc(dev); wlan_serialize_enter(); ath_shutdown(&psc->sc_sc); wlan_serialize_exit(); return (0); } static int ath_pci_suspend(device_t dev) { struct ath_pci_softc *psc = device_get_softc(dev); wlan_serialize_enter(); ath_suspend(&psc->sc_sc); wlan_serialize_exit(); return (0); } static int ath_pci_resume(device_t dev) { struct ath_pci_softc *psc = device_get_softc(dev); wlan_serialize_enter(); ath_resume(&psc->sc_sc); wlan_serialize_exit(); return (0); } static device_method_t ath_pci_methods[] = { /* Device interface */ DEVMETHOD(device_probe, ath_pci_probe), DEVMETHOD(device_attach, ath_pci_attach), DEVMETHOD(device_detach, ath_pci_detach), DEVMETHOD(device_shutdown, ath_pci_shutdown), DEVMETHOD(device_suspend, ath_pci_suspend), DEVMETHOD(device_resume, ath_pci_resume), DEVMETHOD_END }; static driver_t ath_pci_driver = { "ath", ath_pci_methods, sizeof (struct ath_pci_softc) }; static devclass_t ath_devclass; DRIVER_MODULE(ath, pci, ath_pci_driver, ath_devclass, NULL, NULL); MODULE_VERSION(ath, 1); MODULE_DEPEND(ath, ath_hal, 1, 1, 1); /* Atheros HAL */ MODULE_DEPEND(ath, ath_rate, 1, 1, 1); /* rate control algorithm */ MODULE_DEPEND(ath, wlan, 1, 1, 1); /* 802.11 media layer */