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      1 /* $NetBSD: ahcisata_acpi.c,v 1.6 2020/12/07 10:02:51 jmcneill Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2018 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jared McNeill <jmcneill (at) invisible.ca>.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 __KERNEL_RCSID(0, "$NetBSD: ahcisata_acpi.c,v 1.6 2020/12/07 10:02:51 jmcneill Exp $");
     34 
     35 #include <sys/param.h>
     36 #include <sys/bus.h>
     37 #include <sys/cpu.h>
     38 #include <sys/device.h>
     39 #include <sys/termios.h>
     40 
     41 #include <dev/ata/atavar.h>
     42 #include <dev/ic/ahcisatavar.h>
     43 
     44 #include <dev/acpi/acpireg.h>
     45 #include <dev/acpi/acpivar.h>
     46 #include <dev/acpi/acpi_intr.h>
     47 
     48 #include <dev/pci/pcireg.h>
     49 
     50 static int	ahcisata_acpi_match(device_t, cfdata_t, void *);
     51 static void	ahcisata_acpi_attach(device_t, device_t, void *);
     52 
     53 CFATTACH_DECL_NEW(ahcisata_acpi, sizeof(struct ahci_softc), ahcisata_acpi_match, ahcisata_acpi_attach, NULL, NULL);
     54 
     55 static int
     56 ahcisata_acpi_match(device_t parent, cfdata_t cf, void *aux)
     57 {
     58 	struct acpi_attach_args *aa = aux;
     59 
     60 	if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE)
     61 		return 0;
     62 
     63 	return acpi_match_class(aa->aa_node->ad_handle,
     64 	    PCI_CLASS_MASS_STORAGE,
     65 	    PCI_SUBCLASS_MASS_STORAGE_SATA,
     66 	    PCI_INTERFACE_SATA_AHCI10);
     67 }
     68 
     69 static void
     70 ahcisata_acpi_attach(device_t parent, device_t self, void *aux)
     71 {
     72 	struct ahci_softc * const sc = device_private(self);
     73 	struct acpi_attach_args *aa = aux;
     74 	struct acpi_resources res;
     75 	struct acpi_mem *mem;
     76 	struct acpi_irq *irq;
     77 	ACPI_STATUS rv;
     78 	uint32_t cap;
     79 	void *ih;
     80 
     81 	rv = acpi_resource_parse(self, aa->aa_node->ad_handle, "_CRS",
     82 	    &res, &acpi_resource_parse_ops_default);
     83 	if (ACPI_FAILURE(rv))
     84 		return;
     85 
     86 	mem = acpi_res_mem(&res, 0);
     87 	if (mem == NULL) {
     88 		aprint_error(": couldn't find mem resource\n");
     89 		goto done;
     90 	}
     91 
     92 	irq = acpi_res_irq(&res, 0);
     93 	if (irq == NULL) {
     94 		aprint_error(": couldn't find irq resource\n");
     95 		goto done;
     96 	}
     97 
     98 	sc->sc_atac.atac_dev = self;
     99 	sc->sc_ahcit = aa->aa_memt;
    100 	sc->sc_ahcis = mem->ar_length;
    101 	if (bus_space_map(aa->aa_memt, mem->ar_base, mem->ar_length, 0, &sc->sc_ahcih) != 0) {
    102 		aprint_error(": couldn't map registers\n");
    103 		goto done;
    104 	}
    105 
    106 	cap = AHCI_READ(sc, AHCI_CAP);
    107 	if ((cap & AHCI_CAP_64BIT) != 0 && BUS_DMA_TAG_VALID(aa->aa_dmat64)) {
    108 		aprint_verbose_dev(self, "using 64-bit DMA\n");
    109 		sc->sc_dmat = aa->aa_dmat64;
    110 	} else {
    111 		aprint_verbose_dev(self, "using 32-bit DMA\n");
    112 		sc->sc_dmat = aa->aa_dmat;
    113 	}
    114 
    115 	ih = acpi_intr_establish(self,
    116 	    (uint64_t)(uintptr_t)aa->aa_node->ad_handle,
    117 	    IPL_BIO, false, ahci_intr, sc, device_xname(self));
    118 	if (ih == NULL) {
    119 		aprint_error_dev(self, "couldn't install interrupt handler\n");
    120 		return;
    121 	}
    122 
    123 	ahci_attach(sc);
    124 
    125 done:
    126 	acpi_resource_cleanup(&res);
    127 }
    128