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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.
*/
/*
* Description: AHCI HBA driver
* Author: Ian Marco Moffett
*/
#include <sys/types.h>
#include <sys/syslog.h>
#include <sys/cdefs.h>
#include <io/pci/pci.h>
#include <os/module.h>
/*
* 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);
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