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ahcisata_pci.c revision 1.1 
      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 		    &regt, &regh, 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