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