158 lines
4.0 KiB
C
158 lines
4.0 KiB
C
/* $OpenBSD: iosf_pci.c,v 1.1 2023/04/23 00:20:26 dlg Exp $ */
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/*
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* Copyright (c) 2023 David Gwynne <dlg@openbsd.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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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/device.h>
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#include <sys/mutex.h>
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#include <sys/rwlock.h>
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#include <machine/bus.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/iosfvar.h>
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/*
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* Intel OnChip System Fabric driver
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*/
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struct iosf_pci_softc {
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struct device sc_dev;
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pci_chipset_tag_t sc_pc;
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pcitag_t sc_pcitag;
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int sc_semaddr;
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struct iosf_mbi sc_mbi;
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};
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static int iosf_pci_match(struct device *, void *, void *);
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static void iosf_pci_attach(struct device *, struct device *, void *);
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static uint32_t iosf_pci_mbi_mdr_rd(struct iosf_mbi *, uint32_t, uint32_t);
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static void iosf_pci_mbi_mdr_wr(struct iosf_mbi *, uint32_t, uint32_t,
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uint32_t);
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const struct cfattach iosf_pci_ca = {
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sizeof(struct iosf_pci_softc), iosf_pci_match, iosf_pci_attach
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};
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struct iosf_pci_device {
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struct pci_matchid id_pm;
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int id_semaddr;
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};
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static const struct iosf_pci_device iosf_pci_devices[] = {
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{ { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_BAYTRAIL_HB }, 0x7 },
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{ { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_BSW_HB }, 0x10e },
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/* Quark X1000, -1 */
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/* Tangier, -1 */
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};
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static const struct iosf_pci_device *
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iosf_pci_device_match(struct pci_attach_args *pa)
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{
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pci_vendor_id_t vid = PCI_VENDOR(pa->pa_id);
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pci_product_id_t pid = PCI_PRODUCT(pa->pa_id);
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const struct iosf_pci_device *id;
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size_t i;
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for (i = 0; i < nitems(iosf_pci_devices); i++) {
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id = &iosf_pci_devices[i];
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if (id->id_pm.pm_vid == vid && id->id_pm.pm_pid == pid)
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return (id);
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}
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return (NULL);
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}
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static int
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iosf_pci_match(struct device *parent, void *match, void *aux)
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{
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struct pci_attach_args *pa = aux;
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if (iosf_pci_device_match(pa) != NULL) {
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/* match higher than pchb(4) */
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return (2);
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}
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return (0);
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}
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static void
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iosf_pci_attach(struct device *parent, struct device *self, void *aux)
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{
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struct iosf_pci_softc *sc = (struct iosf_pci_softc *)self;
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struct pci_attach_args *pa = aux;
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const struct iosf_pci_device *id = iosf_pci_device_match(pa);
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sc->sc_pc = pa->pa_pc;
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sc->sc_pcitag = pa->pa_tag;
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printf(": mbi\n");
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sc->sc_mbi.mbi_dev = self;
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sc->sc_mbi.mbi_prio = 2; /* prefer pci over acpi ops */
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sc->sc_mbi.mbi_semaddr = id->id_semaddr;
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sc->sc_mbi.mbi_mdr_rd = iosf_pci_mbi_mdr_rd;
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sc->sc_mbi.mbi_mdr_wr = iosf_pci_mbi_mdr_wr;
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iosf_mbi_attach(&sc->sc_mbi);
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}
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/*
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* mbi mdr pciconf operations
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*/
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#define IOSF_PCI_MBI_MCR 0xd0
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#define IOSF_PCI_MBI_MDR 0xd4
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#define IOSF_PCI_MBI_MCRX 0xd8
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static uint32_t
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iosf_pci_mbi_mdr_rd(struct iosf_mbi *mbi, uint32_t mcr, uint32_t mcrx)
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{
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struct iosf_pci_softc *sc = (struct iosf_pci_softc *)mbi->mbi_dev;
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if (mcrx != 0) {
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pci_conf_write(sc->sc_pc, sc->sc_pcitag,
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IOSF_PCI_MBI_MCRX, mcrx);
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}
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pci_conf_write(sc->sc_pc, sc->sc_pcitag, IOSF_PCI_MBI_MCR, mcr);
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return (pci_conf_read(sc->sc_pc, sc->sc_pcitag, IOSF_PCI_MBI_MDR));
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}
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static void
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iosf_pci_mbi_mdr_wr(struct iosf_mbi *mbi, uint32_t mcr, uint32_t mcrx,
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uint32_t mdr)
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{
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struct iosf_pci_softc *sc = (struct iosf_pci_softc *)mbi->mbi_dev;
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pci_conf_write(sc->sc_pc, sc->sc_pcitag, IOSF_PCI_MBI_MDR, mdr);
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if (mcrx != 0) {
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pci_conf_write(sc->sc_pc, sc->sc_pcitag,
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IOSF_PCI_MBI_MCRX, mcrx);
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}
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pci_conf_write(sc->sc_pc, sc->sc_pcitag, IOSF_PCI_MBI_MCR, mcr);
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}
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