/* * 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 #include #include #include #include #include #include #include #include #include #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);