/* * 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. */ /* * Description: AHCI HBA driver * Author: Ian Marco Moffett */ #include #include #include #include #include /* * Represents the PCI advocation descriptor for this * device so we can advertise ourselves as its driver. */ static struct pci_adv driver; /* * Initialize only the AHCI driver's state rather than * the hardware it covers. This is used so we can advertise * ourself to the PCI driver. */ static int ahci_init(struct module *modp) { int error; if ((error = pci_advoc(&driver)) < 0) { printf("ahci_init: failed to advocate for HBA\n"); return error; } return 0; } /* * Ran when a device is attached, does the actual * hardware initialization. */ static int ahci_attach(struct pci_adv *adv) { printf("ahci: detected AHCI controller\n"); return 0; } static struct pci_adv driver = { .lookup = PCI_CS_ID(0x1, 0x06), .attach = ahci_attach, .classrev = 1 }; MODULE_EXPORT("ahci", MODTYPE_PCI, ahci_init);