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      1 /* $NetBSD: sbpcihb.c,v 1.3 2011/07/10 23:32:03 matt Exp $ */
      2 
      3 /*
      4  * Copyright 2000, 2001
      5  * Broadcom Corporation. All rights reserved.
      6  *
      7  * This software is furnished under license and may be used and copied only
      8  * in accordance with the following terms and conditions.  Subject to these
      9  * conditions, you may download, copy, install, use, modify and distribute
     10  * modified or unmodified copies of this software in source and/or binary
     11  * form. No title or ownership is transferred hereby.
     12  *
     13  * 1) Any source code used, modified or distributed must reproduce and
     14  *    retain this copyright notice and list of conditions as they appear in
     15  *    the source file.
     16  *
     17  * 2) No right is granted to use any trade name, trademark, or logo of
     18  *    Broadcom Corporation. Neither the "Broadcom Corporation" name nor any
     19  *    trademark or logo of Broadcom Corporation may be used to endorse or
     20  *    promote products derived from this software without the prior written
     21  *    permission of Broadcom Corporation.
     22  *
     23  * 3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR IMPLIED
     24  *    WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED WARRANTIES OF
     25  *    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
     26  *    NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL BROADCOM BE LIABLE
     27  *    FOR ANY DAMAGES WHATSOEVER, AND IN PARTICULAR, BROADCOM SHALL NOT BE
     28  *    LIABLE FOR DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     29  *    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     30  *    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
     31  *    BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     32  *    WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
     33  *    OR OTHERWISE), EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     34  */
     35 
     36 /*
     37  * Driver for SB-1250 PCI Host Bridge.
     38  *
     39  * Doesn't have to do much at all.
     40  */
     41 
     42 #include <sys/param.h>
     43 #include <sys/device.h>
     44 #include <sys/systm.h>
     45 
     46 #include <dev/pci/pcireg.h>
     47 #include <dev/pci/pcivar.h>
     48 #include <dev/pci/ppbreg.h>
     49 #include <dev/pci/pcidevs.h>
     50 
     51 #include <mips/locore.h>
     52 #include <mips/sibyte/include/sb1250_regs.h>
     53 #include <mips/sibyte/include/sb1250_scd.h>
     54 
     55 static int	sbpcihb_match(device_t, cfdata_t, void *);
     56 static void	sbpcihb_attach(device_t, device_t, void *);
     57 
     58 CFATTACH_DECL_NEW(sbpcihb, 0,
     59     sbpcihb_match, sbpcihb_attach, NULL, NULL);
     60 
     61 static int
     62 sbpcihb_match(device_t parent, cfdata_t match, void *aux)
     63 {
     64 	struct pci_attach_args *pa = aux;
     65 	int bus, device;
     66 
     67 	pci_decompose_tag(pa->pa_pc, pa->pa_tag, &bus, &device, NULL);
     68 
     69 	/* Check for a vendor/device match.  */
     70 	if (bus == 0 && device == 0
     71 	    && PCI_VENDOR(pa->pa_id) == PCI_VENDOR_SIBYTE
     72 	    && PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_SIBYTE_BCM1250_PCIHB)
     73 		return 1;
     74 
     75 	return 0;
     76 }
     77 
     78 static void
     79 sbpcihb_attach(device_t parent, device_t self, void *aux)
     80 {
     81 	uint64_t regval;
     82 	bool host;
     83 
     84 	/* Tell the user whether it's host or device mode. */
     85 	regval = mips3_ld((void *)MIPS_PHYS_TO_KSEG0(A_SCD_SYSTEM_CFG));
     86 	host = (regval & M_SYS_PCI_HOST) != 0;
     87 
     88 	aprint_normal(": %s mode\n", host ? "host" : "device");
     89 }
     90