/* $NetBSD: iop_pci.c,v 1.30 2018/12/09 11:14:02 jdolecek Exp $ */

/* $NetBSD: iop_pci.c,v 1.30 2018/12/09 11:14:02 jdolecek Exp $ */

/*-
* Copyright (c) 2000, 2001, 2002 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Andrew Doran.
*
* 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.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 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 DAMAGE.
*/

/*
* PCI front-end for `iop' driver.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: iop_pci.c,v 1.30 2018/12/09 11:14:02 jdolecek Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/queue.h>
#include <sys/proc.h>

#include <machine/endian.h>
#include <sys/bus.h>

#include <dev/pci/pcidevs.h>
#include <dev/pci/pcivar.h>

#include <dev/i2o/i2o.h>
#include <dev/i2o/iopreg.h>
#include <dev/i2o/iopio.h>
#include <dev/i2o/iopvar.h>

#define PCI_INTERFACE_I2O_POLLED 0x00
#define PCI_INTERFACE_I2O_INTRDRIVEN 0x01

static void iop_pci_attach(device_t, device_t, void *);
static int iop_pci_match(device_t, cfdata_t, void *);

CFATTACH_DECL_NEW(iop_pci, sizeof(struct iop_softc),
iop_pci_match, iop_pci_attach, NULL, NULL);

static int
iop_pci_match(device_t parent, cfdata_t match, void *aux)
{
struct pci_attach_args *pa;
u_int product, vendor;
pcireg_t reg;

pa = aux;

/*
* Look for an "intelligent I/O processor" that adheres to the I2O
* specification. Ignore the device if it doesn't support interrupt
* driven operation.
*/
if (PCI_CLASS(pa->pa_class) == PCI_CLASS_I2O &&
PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_I2O_STANDARD &&
PCI_INTERFACE(pa->pa_class) == PCI_INTERFACE_I2O_INTRDRIVEN)
return (1);

/*
* Match boards that don't conform exactly to the spec.
*/
vendor = PCI_VENDOR(pa->pa_id);
product = PCI_PRODUCT(pa->pa_id);

if (vendor == PCI_VENDOR_DPT &&
(product == PCI_PRODUCT_DPT_RAID_I2O ||
product == PCI_PRODUCT_DPT_RAID_2005S))
return (1);

if (vendor == PCI_VENDOR_INTEL &&
(product == PCI_PRODUCT_INTEL_80960RM_2 ||
product == PCI_PRODUCT_INTEL_80960_RP)) {
reg = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_SUBSYS_ID_REG);
if (PCI_VENDOR(reg) == PCI_VENDOR_PROMISE)
return (1);
}

return (0);
}

static void
iop_pci_attach(device_t parent, device_t self, void *aux)
{
struct pci_attach_args *pa;
struct iop_softc *sc;
pci_chipset_tag_t pc;
pci_intr_handle_t ih;
const char *intrstr;
pcireg_t reg;
int i;
char intrbuf[PCI_INTRSTR_LEN];

sc = device_private(self);
sc->sc_dev = self;
pa = aux;
pc = pa->pa_pc;
printf(": ");

/*
* The kernel always uses the first memory mapping to communicate
* with the IOP.
*/
for (i = PCI_MAPREG_START; i < PCI_MAPREG_END; i += 4) {
reg = pci_conf_read(pc, pa->pa_tag, i);
if (PCI_MAPREG_TYPE(reg) == PCI_MAPREG_TYPE_MEM) {
sc->sc_memaddr = PCI_MAPREG_MEM_ADDR(reg);
break;
}
}
if (i == PCI_MAPREG_END) {
aprint_error("can't find mapping\n");
return;
}

/* Map the register window. */
if (pci_mapreg_map(pa, i, PCI_MAPREG_TYPE_MEM, 0, &sc->sc_iot,
&sc->sc_ioh, NULL, NULL)) {
aprint_error_dev(self, "can't map register window\n");
return;
}

/* Map the 2nd register window. */
if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_DPT &&
PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_DPT_RAID_2005S) {
i += 4; /* next BAR */
if (i == PCI_MAPREG_END) {
aprint_error("can't find mapping\n");
return;
}

#if 0
/* Should we check it? (see FreeBSD's asr driver) */
reg = pci_conf_read(pc, pa->pa_tag, PCI_SUBSYS_ID_REG);
printf("subid %x, %x\n", PCI_VENDOR(reg), PCI_PRODUCT(reg));
#endif
if (pci_mapreg_map(pa, i, PCI_MAPREG_TYPE_MEM, 0,
&sc->sc_msg_iot, &sc->sc_msg_ioh, NULL, NULL)) {
aprint_error_dev(self,
"can't map 2nd register window\n");
return;
}
} else {
/* iop devices other than 2005S */
sc->sc_msg_iot = sc->sc_iot;
sc->sc_msg_ioh = sc->sc_ioh;
}

sc->sc_pcibus = pa->pa_bus;
sc->sc_pcidev = pa->pa_device;
sc->sc_dmat = pa->pa_dmat;
sc->sc_bus_memt = pa->pa_memt;
sc->sc_bus_iot = pa->pa_iot;

/* Enable the device. */
reg = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG);
pci_conf_write(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG,
reg | PCI_COMMAND_MASTER_ENABLE);

/* Map and establish the interrupt.. */
if (pci_intr_map(pa, &ih)) {
aprint_error("can't map interrupt\n");
return;
}
intrstr = pci_intr_string(pc, ih, intrbuf, sizeof(intrbuf));
sc->sc_ih = pci_intr_establish_xname(pc, ih, IPL_BIO, iop_intr, sc,
device_xname(self));
if (sc->sc_ih == NULL) {
aprint_error("can't establish interrupt");
if (intrstr != NULL)
aprint_error(" at %s", intrstr);
aprint_error("\n");
return;
}

/* Attach to the bus-independent code. */
iop_init(sc, intrstr);
}