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/*
* Copyright (c) 2025 Ian Marco Moffett and L5 engineers
* All rights reserved.
*
* 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.
* 3. Neither the name of the project nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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/types.h>
#include <sys/syslog.h>
#include <sys/errno.h>
#include <os/bus.h>
#include <os/mmio.h>
#include <io/usb/xhcivar.h>
#include <io/usb/xhciregs.h>
#include <io/pci/bar.h>
#include <io/pci/pci.h>
#include <os/module.h>
#define pr_trace(fmt, ...) printf("xhci: " fmt, ##__VA_ARGS__)
#if defined(XHCI_DEBUG)
#define dtrace(fmt, ...) printf("xhci: " fmt, ##__VA_ARGS__)
#else
#define dtrace(...) __nothing
#endif /* AHCI_DEBUG */
static struct pci_adv adv;
static struct pci_device dev;
static struct xhci_hcd hcd;
static int
xhci_init(struct module *modp)
{
int error;
if ((error = pci_advoc(&adv)) < 0) {
return error;
}
return 0;
}
static int
xhci_attach(struct pci_adv *ap)
{
static bool once = false;
struct bus_space bs;
int error;
/* Only run once */
if (once) {
return -EAGAIN;
}
once = true;
pr_trace("detected xHCI controller\n");
/* Get the BAR */
dev = ap->lookup;
error = pci_map_bar(&dev, 0, &bs);
if (error < 0) {
pr_trace("failed to get BAR 0 and 1\n");
return error;
}
hcd.io = bs.va_base;
return 0;
}
static struct pci_adv adv = {
.lookup = PCI_CSI_ID(0x0C, 0x03, 0x30),
.idtype = PCI_LU_ICLASSREV,
.attach = xhci_attach
};
MODULE_EXPORT("xhci", MODTYPE_PCI, xhci_init);
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