298 lines
7.4 KiB
C
298 lines
7.4 KiB
C
/*-
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* Copyright (c) 2002-2008 Sam Leffler, Errno Consulting
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
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* redistribution must be conditioned upon including a substantially
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* similar Disclaimer requirement for further binary redistribution.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
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* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* PCI/Cardbus front-end for the Atheros Wireless LAN controller driver.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/module.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/errno.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <sys/bus.h>
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#include <sys/rman.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#include <net/if_media.h>
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#include <net/if_arp.h>
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#include <net80211/ieee80211_var.h>
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#include <dev/ath/if_athvar.h>
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#include <dev/pci/pcivar.h>
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#include <dev/pci/pcireg.h>
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/*
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* PCI glue.
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*/
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struct ath_pci_softc {
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struct ath_softc sc_sc;
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struct resource *sc_sr; /* memory resource */
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struct resource *sc_irq; /* irq resource */
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void *sc_ih; /* interrupt handler */
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};
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#define BS_BAR 0x10
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#define PCIR_RETRY_TIMEOUT 0x41
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#define PCIR_CFG_PMCSR 0x48
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static void
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ath_pci_setup(device_t dev)
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{
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#ifdef ATH_PCI_LATENCY_WAR
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/* Override the system latency timer */
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pci_write_config(dev, PCIR_LATTIMER, 0x80, 1);
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#endif
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/* If a PCI NIC, force wakeup */
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#ifdef ATH_PCI_WAKEUP_WAR
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/* XXX TODO: don't do this for non-PCI (ie, PCIe, Cardbus!) */
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if (1) {
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uint16_t pmcsr;
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pmcsr = pci_read_config(dev, PCIR_CFG_PMCSR, 2);
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pmcsr |= 3;
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pci_write_config(dev, PCIR_CFG_PMCSR, pmcsr, 2);
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pmcsr &= ~3;
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pci_write_config(dev, PCIR_CFG_PMCSR, pmcsr, 2);
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}
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#endif
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/*
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* Disable retry timeout to keep PCI Tx retries from
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* interfering with C3 CPU state.
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*/
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pci_write_config(dev, PCIR_RETRY_TIMEOUT, 0, 1);
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}
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static int
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ath_pci_probe(device_t dev)
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{
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const char* devname;
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devname = ath_hal_probe(pci_get_vendor(dev), pci_get_device(dev));
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if (devname != NULL) {
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device_set_desc(dev, devname);
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return BUS_PROBE_DEFAULT;
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}
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return ENXIO;
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}
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static int
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ath_pci_attach(device_t dev)
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{
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struct ath_pci_softc *psc = device_get_softc(dev);
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struct ath_softc *sc = &psc->sc_sc;
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int error = ENXIO;
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int rid;
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sc->sc_dev = dev;
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/*
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* Enable bus mastering.
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*/
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pci_enable_busmaster(dev);
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/*
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* Setup other PCI bus configuration parameters.
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*/
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ath_pci_setup(dev);
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/*
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* Setup memory-mapping of PCI registers.
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*/
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rid = BS_BAR;
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psc->sc_sr = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
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RF_ACTIVE);
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if (psc->sc_sr == NULL) {
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device_printf(dev, "cannot map register space\n");
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goto bad;
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}
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/* XXX uintptr_t is a bandaid for ia64; to be fixed */
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sc->sc_st = (HAL_BUS_TAG)(uintptr_t) rman_get_bustag(psc->sc_sr);
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sc->sc_sh = (HAL_BUS_HANDLE) rman_get_bushandle(psc->sc_sr);
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/*
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* Mark device invalid so any interrupts (shared or otherwise)
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* that arrive before the HAL is setup are discarded.
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*/
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sc->sc_invalid = 1;
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/*
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* Arrange interrupt line.
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*/
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rid = 0;
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psc->sc_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
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RF_SHAREABLE|RF_ACTIVE);
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if (psc->sc_irq == NULL) {
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device_printf(dev, "could not map interrupt\n");
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goto bad1;
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}
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if (bus_setup_intr(dev, psc->sc_irq,
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INTR_TYPE_NET | INTR_MPSAFE,
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NULL, ath_intr, sc, &psc->sc_ih)) {
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device_printf(dev, "could not establish interrupt\n");
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goto bad2;
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}
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/*
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* Setup DMA descriptor area.
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*/
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if (bus_dma_tag_create(bus_get_dma_tag(dev), /* parent */
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1, 0, /* alignment, bounds */
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BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
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BUS_SPACE_MAXADDR, /* highaddr */
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NULL, NULL, /* filter, filterarg */
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0x3ffff, /* maxsize XXX */
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ATH_MAX_SCATTER, /* nsegments */
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0x3ffff, /* maxsegsize XXX */
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BUS_DMA_ALLOCNOW, /* flags */
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NULL, /* lockfunc */
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NULL, /* lockarg */
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&sc->sc_dmat)) {
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device_printf(dev, "cannot allocate DMA tag\n");
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goto bad3;
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}
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ATH_LOCK_INIT(sc);
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ATH_PCU_LOCK_INIT(sc);
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error = ath_attach(pci_get_device(dev), sc);
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if (error == 0) /* success */
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return 0;
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ATH_PCU_LOCK_DESTROY(sc);
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ATH_LOCK_DESTROY(sc);
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bus_dma_tag_destroy(sc->sc_dmat);
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bad3:
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bus_teardown_intr(dev, psc->sc_irq, psc->sc_ih);
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bad2:
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bus_release_resource(dev, SYS_RES_IRQ, 0, psc->sc_irq);
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bad1:
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bus_release_resource(dev, SYS_RES_MEMORY, BS_BAR, psc->sc_sr);
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bad:
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return (error);
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}
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static int
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ath_pci_detach(device_t dev)
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{
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struct ath_pci_softc *psc = device_get_softc(dev);
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struct ath_softc *sc = &psc->sc_sc;
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/* check if device was removed */
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sc->sc_invalid = !bus_child_present(dev);
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/*
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* Do a config read to clear pre-existing pci error status.
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*/
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(void) pci_read_config(dev, PCIR_COMMAND, 4);
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ath_detach(sc);
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bus_generic_detach(dev);
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bus_teardown_intr(dev, psc->sc_irq, psc->sc_ih);
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bus_release_resource(dev, SYS_RES_IRQ, 0, psc->sc_irq);
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bus_dma_tag_destroy(sc->sc_dmat);
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bus_release_resource(dev, SYS_RES_MEMORY, BS_BAR, psc->sc_sr);
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ATH_PCU_LOCK_DESTROY(sc);
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ATH_LOCK_DESTROY(sc);
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return (0);
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}
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static int
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ath_pci_shutdown(device_t dev)
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{
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struct ath_pci_softc *psc = device_get_softc(dev);
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ath_shutdown(&psc->sc_sc);
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return (0);
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}
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static int
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ath_pci_suspend(device_t dev)
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{
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struct ath_pci_softc *psc = device_get_softc(dev);
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ath_suspend(&psc->sc_sc);
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return (0);
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}
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static int
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ath_pci_resume(device_t dev)
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{
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struct ath_pci_softc *psc = device_get_softc(dev);
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/*
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* Suspend/resume resets the PCI configuration space.
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*/
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ath_pci_setup(dev);
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ath_resume(&psc->sc_sc);
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return (0);
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}
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static device_method_t ath_pci_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, ath_pci_probe),
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DEVMETHOD(device_attach, ath_pci_attach),
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DEVMETHOD(device_detach, ath_pci_detach),
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DEVMETHOD(device_shutdown, ath_pci_shutdown),
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DEVMETHOD(device_suspend, ath_pci_suspend),
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DEVMETHOD(device_resume, ath_pci_resume),
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{ 0,0 }
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};
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static driver_t ath_pci_driver = {
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"ath",
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ath_pci_methods,
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sizeof (struct ath_pci_softc)
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};
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static devclass_t ath_devclass;
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DRIVER_MODULE(ath_pci, pci, ath_pci_driver, ath_devclass, 0, 0);
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MODULE_VERSION(ath_pci, 1);
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MODULE_DEPEND(ath_pci, wlan, 1, 1, 1); /* 802.11 media layer */
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MODULE_DEPEND(ath_pci, if_ath, 1, 1, 1); /* if_ath driver */
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