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
sbpcihb_match(device_t parent,cfdata_t match,void * aux)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
sbpcihb_attach(device_t parent,device_t self,void * aux)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