From 8654dae3a55246763e385c38343789923d54c081 Mon Sep 17 00:00:00 2001 From: Ian Moffett Date: Tue, 18 Feb 2025 16:57:12 -0500 Subject: kernel: ahci: Add initial skeleton Signed-off-by: Ian Moffett --- sys/dev/ic/ahci.c | 66 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 66 insertions(+) create mode 100644 sys/dev/ic/ahci.c (limited to 'sys') diff --git a/sys/dev/ic/ahci.c b/sys/dev/ic/ahci.c new file mode 100644 index 0000000..d3d303b --- /dev/null +++ b/sys/dev/ic/ahci.c @@ -0,0 +1,66 @@ +/* + * Copyright (c) 2023-2025 Ian Marco Moffett and the Osmora Team. + * 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 Hyra 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 + +#define pr_trace(fmt, ...) kprintf("ahci: " fmt, ##__VA_ARGS__) +#define pr_error(...) pr_trace(__VA_ARGS__) + +static struct pci_device *ahci_dev; + +static int +ahci_init(void) +{ + struct pci_lookup lookup; + + lookup.pci_class = 0x01; + lookup.pci_subclass = 0x06; + + ahci_dev = pci_get_device(lookup, PCI_CLASS | PCI_SUBCLASS); + if (ahci_dev == NULL) { + return -ENODEV; + } + + /* + * The AHCI Host Bus Adapter (HBA) connects SATA + * devices to the PCI bus, acting as an interface + * between them. + */ + pr_trace("Detected AHCI HBA (%x:%x.%x, slot=%d)\n", + ahci_dev->bus, ahci_dev->device_id, ahci_dev->func, + ahci_dev->slot); + + return 0; +} + +DRIVER_EXPORT(ahci_init); -- cgit v1.2.3