1 /* $NetBSD: ahcisata_pci.c,v 1.1 2007/05/12 11:04:59 bouyer Exp $ */ 2 3 /* 4 * Copyright (c) 2006 Manuel Bouyer. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Manuel Bouyer. 17 * 4. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 * 31 */ 32 33 #include <sys/cdefs.h> 34 __KERNEL_RCSID(0, "$NetBSD: ahcisata_pci.c,v 1.1 2007/05/12 11:04:59 bouyer Exp $"); 35 36 #include <sys/types.h> 37 #include <sys/malloc.h> 38 #include <sys/param.h> 39 #include <sys/kernel.h> 40 #include <sys/systm.h> 41 #include <sys/disklabel.h> 42 43 #include <uvm/uvm_extern.h> 44 45 #include <dev/pci/pcivar.h> 46 #include <dev/pci/pcidevs.h> 47 #include <dev/pci/pciidereg.h> 48 #include <dev/pci/pciidevar.h> 49 #include <dev/ic/ahcisatavar.h> 50 51 static int ahci_pci_match(struct device *, struct cfdata *, void *); 52 static void ahci_pci_attach(struct device *, struct device *, void *); 53 54 CFATTACH_DECL(ahcisata_pci, sizeof(struct ahci_softc), 55 ahci_pci_match, ahci_pci_attach, NULL, NULL); 56 57 static int 58 ahci_pci_match(struct device *parent, struct cfdata *match, 59 void *aux) 60 { 61 struct pci_attach_args *pa = aux; 62 bus_space_tag_t regt; 63 bus_space_handle_t regh; 64 bus_size_t size; 65 int ret = 0; 66 67 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_MASS_STORAGE && 68 PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_MASS_STORAGE_SATA && 69 PCI_INTERFACE(pa->pa_class) == PCI_INTERFACE_SATA_AHCI) { 70 /* check if the chip is in ahci mode */ 71 if (pci_mapreg_map(pa, AHCI_PCI_ABAR, 72 PCI_MAPREG_TYPE_MEM | PCI_MAPREG_MEM_TYPE_32BIT, 0, 73 ®t, ®h, NULL, &size) != 0) 74 return (0); 75 if (bus_space_read_4(regt, regh, AHCI_GHC) & AHCI_GHC_AE) 76 ret = 3; 77 bus_space_unmap(regt, regh, size); 78 return (3); 79 } 80 81 return (ret); 82 } 83 84 static void 85 ahci_pci_attach(struct device *parent, struct device *self, void *aux) 86 { 87 struct pci_attach_args *pa = aux; 88 struct ahci_softc *sc = (struct ahci_softc *)self; 89 bus_size_t size; 90 char devinfo[256]; 91 const char *intrstr; 92 pci_intr_handle_t intrhandle; 93 void *ih; 94 95 if (pci_mapreg_map(pa, AHCI_PCI_ABAR, 96 PCI_MAPREG_TYPE_MEM | PCI_MAPREG_MEM_TYPE_32BIT, 0, 97 &sc->sc_ahcit, &sc->sc_ahcih, NULL, &size) != 0) { 98 aprint_error("%s: can't map ahci registers\n", AHCINAME(sc)); 99 return; 100 } 101 pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo)); 102 aprint_naive(": AHCI disk controller\n"); 103 aprint_normal(": %s\n", devinfo); 104 105 if (pci_intr_map(pa, &intrhandle) != 0) { 106 aprint_error("%s: couldn't map interrupt\n", AHCINAME(sc)); 107 return; 108 } 109 intrstr = pci_intr_string(pa->pa_pc, intrhandle); 110 ih = pci_intr_establish(pa->pa_pc, intrhandle, IPL_BIO, ahci_intr, sc); 111 if (ih == NULL) { 112 aprint_error("%s: couldn't establish interrupt", AHCINAME(sc)); 113 return; 114 } 115 aprint_normal("%s: interrupting at %s\n", AHCINAME(sc), 116 intrstr ? intrstr : "unknown interrupt"); 117 sc->sc_dmat = pa->pa_dmat; 118 ahci_attach(sc); 119 } 120