d8e1a7b61a
where it looks straightforward, and pci_aprint_devinfo_fancy in a few
others where drivers want to supply their own device names instead
of the pcidevs generated one. More complicated cases, where names
are composed at runtime, are left alone for now. It certainly makes
sense to simplify the drivers here rather than inventing a catch-all API.
This should serve as as example for new drivers, and also ensure
consistent output in the AB_QUIET ("boot -q") case. Also, it avoids
excessive stack usage where drivers attach child devices because the
buffer for the device name is not kept on the local stack anymore.
132 lines
4.0 KiB
C
132 lines
4.0 KiB
C
/* $NetBSD: joy_pci.c,v 1.20 2012/01/30 19:41:22 drochner Exp $ */
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/*-
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* Copyright (c) 2000, 2008 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Martin Husemann <martin@NetBSD.org>.
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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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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* 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 IN
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* 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 THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: joy_pci.c,v 1.20 2012/01/30 19:41:22 drochner Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/device.h>
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#include <sys/bus.h>
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#include <dev/pci/pcireg.h>
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#include <dev/pci/pcivar.h>
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#include <dev/pci/pcidevs.h>
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#include <dev/ic/joyvar.h>
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struct joy_pci_softc {
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struct joy_softc sc_joy;
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kmutex_t sc_lock;
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};
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static int bar_is_io(pci_chipset_tag_t pc, pcitag_t tag, int reg);
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static int
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joy_pci_match(device_t parent, cfdata_t match, void *aux)
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{
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struct pci_attach_args *pa = aux;
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if (PCI_CLASS(pa->pa_class) == PCI_CLASS_INPUT &&
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PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_INPUT_GAMEPORT &&
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PCI_INTERFACE(pa->pa_class) == 0x10)
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return 1;
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if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_CREATIVELABS &&
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(PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_CREATIVELABS_SBJOY ||
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PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_CREATIVELABS_SBJOY2))
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return 1;
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return 0;
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}
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/* check if this BAR assigns/requests IO space */
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static int
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bar_is_io(pci_chipset_tag_t pc, pcitag_t tag, int reg)
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{
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pcireg_t address, mask;
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address = pci_conf_read(pc, tag, reg);
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pci_conf_write(pc, tag, reg, 0xffffffff);
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mask = pci_conf_read(pc, tag, reg);
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pci_conf_write(pc, tag, reg, address);
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return (PCI_MAPREG_TYPE(address) == PCI_MAPREG_TYPE_IO &&
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PCI_MAPREG_IO_SIZE(mask) > 0);
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}
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static void
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joy_pci_attach(device_t parent, device_t self, void *aux)
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{
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struct joy_pci_softc *psc = device_private(self);
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struct joy_softc *sc = &psc->sc_joy;
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struct pci_attach_args *pa = aux;
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bus_size_t mapsize;
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int reg;
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pci_aprint_devinfo(pa, NULL);
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for (reg = PCI_MAPREG_START; reg < PCI_MAPREG_END;
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reg += sizeof(pcireg_t))
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if (bar_is_io(pa->pa_pc, pa->pa_tag, reg))
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break;
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if (reg >= PCI_MAPREG_END) {
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aprint_error_dev(self,
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"violates PCI spec, no IO region found\n");
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return;
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}
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if (pci_mapreg_map(pa, reg, PCI_MAPREG_TYPE_IO, 0,
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&sc->sc_iot, &sc->sc_ioh, NULL, &mapsize)) {
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aprint_error_dev(self, "could not map IO space\n");
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return;
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}
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if (mapsize != 2) {
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if (!bus_space_subregion(sc->sc_iot, sc->sc_ioh, 1, 1,
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&sc->sc_ioh) < 0) {
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aprint_error_dev(self, "error mapping subregion\n");
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return;
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}
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}
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mutex_init(&psc->sc_lock, MUTEX_DEFAULT, IPL_NONE);
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sc->sc_dev = self;
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sc->sc_lock = &psc->sc_lock;
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joyattach(sc);
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}
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CFATTACH_DECL_NEW(joy_pci, sizeof(struct joy_pci_softc),
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joy_pci_match, joy_pci_attach, NULL, NULL);
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