/* $NetBSD: gcscehci.c,v 1.15 2021/08/07 16:18:55 thorpej Exp $ */

/* $NetBSD: gcscehci.c,v 1.15 2021/08/07 16:18:55 thorpej Exp $ */

/*
* Copyright (c) 2001, 2002, 2007 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Lennart Augustsson ([email protected])
* and Jared D. McNeill ([email protected])
*
* 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.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: gcscehci.c,v 1.15 2021/08/07 16:18:55 thorpej Exp $");

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

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

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

#include <dev/usb/usb.h>
#include <dev/usb/usbdi.h>
#include <dev/usb/usbdivar.h>
#include <dev/usb/usb_mem.h>

#include <dev/usb/ehcireg.h>
#include <dev/usb/ehcivar.h>

#ifdef EHCI_DEBUG
#define DPRINTF(x) if (ehcidebug) printf x
extern int ehcidebug;
#else
#define DPRINTF(x)
#endif

#define GCSCUSB_MSR_BASE 0x51200000
#define GCSCUSB_MSR_EHCB (GCSCUSB_MSR_BASE + 0x09)

struct gcscehci_softc {
ehci_softc_t sc;
pci_chipset_tag_t sc_pc;
pcitag_t sc_tag;
void *sc_ih; /* interrupt vectoring */
};

static int
gcscehci_match(device_t parent, cfdata_t match, void *aux)
{
struct pci_attach_args *pa = (struct pci_attach_args *) aux;

if (PCI_CLASS(pa->pa_class) == PCI_CLASS_SERIALBUS &&
PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_SERIALBUS_USB &&
PCI_INTERFACE(pa->pa_class) == PCI_INTERFACE_EHCI &&
PCI_VENDOR(pa->pa_id) == PCI_VENDOR_AMD &&
PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_AMD_CS5536_EHCI)
return 10; /* beat ehci_pci */

return 0;
}

static void
gcscehci_attach(device_t parent, device_t self, void *aux)
{
struct gcscehci_softc *sc = device_private(self);
struct pci_attach_args *pa = (struct pci_attach_args *)aux;
pci_chipset_tag_t pc = pa->pa_pc;
pcitag_t tag = pa->pa_tag;
char const *intrstr;
pci_intr_handle_t ih;
const char *devname = device_xname(self);
char devinfo[256];
bus_addr_t ehcibase;
int ncomp;
struct usb_pci *up;
char buf[PCI_INTRSTR_LEN];

sc->sc.sc_dev = self;
sc->sc.sc_bus.ub_hcpriv = sc;

aprint_naive(": USB controller\n");

pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo));
aprint_normal(": %s (rev. 0x%02x)\n", devinfo,
PCI_REVISION(pa->pa_class));

/* Map I/O registers */
ehcibase = rdmsr(GCSCUSB_MSR_EHCB) & 0xffffff00;
sc->sc.iot = pa->pa_memt;
sc->sc.sc_size = 256;
if (bus_space_map(sc->sc.iot, ehcibase, 256, 0, &sc->sc.ioh)) {
aprint_error("%s: can't map memory space\n", devname);
return;
}

sc->sc_pc = pc;
sc->sc_tag = tag;
sc->sc.sc_bus.ub_dmatag = pa->pa_dmat;

/* Disable interrupts, so we don't get any spurious ones. */
sc->sc.sc_offs = EREAD1(&sc->sc, EHCI_CAPLENGTH);
DPRINTF(("%s: offs=%d\n", devname, sc->sc.sc_offs));
EOWRITE2(&sc->sc, EHCI_USBINTR, 0);

/* Map and establish the interrupt. */
if (pci_intr_map(pa, &ih)) {
aprint_error("%s: couldn't map interrupt\n", devname);
return;
}
intrstr = pci_intr_string(pc, ih, buf, sizeof(buf));
sc->sc_ih = pci_intr_establish(pc, ih, IPL_USB, ehci_intr, sc);
if (sc->sc_ih == NULL) {
aprint_error("%s: couldn't establish interrupt", devname);
if (intrstr != NULL)
aprint_error(" at %s", intrstr);
aprint_error("\n");
return;
}
aprint_normal("%s: interrupting at %s\n", devname, intrstr);

sc->sc.sc_bus.ub_revision = USBREV_2_0;

/*
* Find companion controllers. According to the spec they always
* have lower function numbers so they should be enumerated already.
*/
ncomp = 0;
TAILQ_FOREACH(up, &ehci_pci_alldevs, next) {
if (up->bus == pa->pa_bus && up->device == pa->pa_device) {
DPRINTF(("gcscehci_attach: companion %s\n",
device_xname(up->usb)));
sc->sc.sc_comps[ncomp++] = up->usb;
if (ncomp >= EHCI_COMPANION_MAX)
break;
}
}
sc->sc.sc_ncomp = ncomp;

int err = ehci_init(&sc->sc);
if (err) {
aprint_error("%s: init failed, error=%d\n", devname, err);
return;
}

/* Attach usb device. */
sc->sc.sc_child = config_found(self, &sc->sc.sc_bus, usbctlprint,
CFARGS_NONE);
}

CFATTACH_DECL_NEW(gcscehci, sizeof(struct gcscehci_softc),
gcscehci_match, gcscehci_attach, NULL, ehci_activate);