1 /* $NetBSD: pciconf_ofmethod.c,v 1.7 2021/01/06 08:17:46 rin Exp $ */
2
3 /*-
4 * Copyright (c) 2007 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jochen Kunz and Tim Rightnour
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 /*
33 * Generic PowerPC functions for talking to a PCI Bridge via the RTAS or
34 * OF methods of the device.
35 */
36
37 #define _POWERPC_BUS_DMA_PRIVATE
38
39 #include <sys/cdefs.h>
40 __KERNEL_RCSID(0, "$NetBSD: pciconf_ofmethod.c,v 1.7 2021/01/06 08:17:46 rin Exp $");
41
42 #include <sys/types.h>
43 #include <sys/param.h>
44 #include <sys/time.h>
45 #include <sys/systm.h>
46 #include <sys/errno.h>
47 #include <sys/device.h>
48 #include <sys/bus.h>
49 #include <sys/intr.h>
50
51 #include <uvm/uvm_extern.h>
52
53 #include <machine/pio.h>
54
55 #include <dev/ofw/openfirm.h>
56 #include <dev/ofw/ofw_pci.h>
57
58 #include <dev/pci/pcivar.h>
59 #include <dev/pci/pcireg.h>
60 #include <dev/pci/pcidevs.h>
61
62 void
genppc_pci_ofmethod_attach_hook(device_t parent,device_t self,struct pcibus_attach_args * pba)63 genppc_pci_ofmethod_attach_hook(device_t parent, device_t self,
64 struct pcibus_attach_args *pba)
65 {
66
67 if (pba->pba_bus != 0)
68 return;
69
70 aprint_normal(": OFW method configuration space access");
71 }
72
73 pcitag_t
genppc_pci_ofmethod_make_tag(void * v,int bus,int dev,int func)74 genppc_pci_ofmethod_make_tag(void *v, int bus, int dev, int func)
75 {
76 return ((bus << OFW_PCI_PHYS_HI_BUSSHIFT) & OFW_PCI_PHYS_HI_BUSMASK) |
77 ((dev << OFW_PCI_PHYS_HI_DEVICESHIFT) & OFW_PCI_PHYS_HI_DEVICEMASK)|
78 ((func << OFW_PCI_PHYS_HI_FUNCTIONSHIFT) &
79 OFW_PCI_PHYS_HI_FUNCTIONMASK);
80 }
81
82 void
genppc_pci_ofmethod_decompose_tag(void * v,pcitag_t tag,int * bp,int * dp,int * fp)83 genppc_pci_ofmethod_decompose_tag(void *v, pcitag_t tag, int *bp, int *dp,
84 int *fp)
85 {
86
87 if (bp != NULL)
88 *bp = OFW_PCI_PHYS_HI_BUS(tag);
89 if (dp != NULL)
90 *dp = OFW_PCI_PHYS_HI_DEVICE(tag);
91 if (fp != NULL)
92 *fp = OFW_PCI_PHYS_HI_FUNCTION(tag);
93 return;
94 }
95
96 pcireg_t
genppc_pci_ofmethod_conf_read(void * v,pcitag_t tag,int reg)97 genppc_pci_ofmethod_conf_read(void *v, pcitag_t tag, int reg)
98 {
99 pci_chipset_tag_t pc = (pci_chipset_tag_t)v;
100 pcireg_t data;
101
102 if ((unsigned int)reg >= PCI_CONF_SIZE)
103 return (pcireg_t) -1;
104
105 tag &= OFW_PCI_PHYS_HI_BUSMASK | OFW_PCI_PHYS_HI_DEVICEMASK |
106 OFW_PCI_PHYS_HI_FUNCTIONMASK;
107 tag |= reg & OFW_PCI_PHYS_HI_REGISTERMASK;
108 if (OF_call_method("config-l@", pc->pc_ihandle, 1, 1, tag, &data) < 0)
109 return (pcireg_t) -1;
110 /*printf("data=0x%x\n", data); */
111 return data;
112 }
113
114 void
genppc_pci_ofmethod_conf_write(void * v,pcitag_t tag,int reg,pcireg_t data)115 genppc_pci_ofmethod_conf_write(void *v, pcitag_t tag, int reg, pcireg_t data)
116 {
117 pci_chipset_tag_t pc = (pci_chipset_tag_t)v;
118
119 if ((unsigned int)reg >= PCI_CONF_SIZE)
120 return;
121
122 tag &= OFW_PCI_PHYS_HI_BUSMASK | OFW_PCI_PHYS_HI_DEVICEMASK |
123 OFW_PCI_PHYS_HI_FUNCTIONMASK;
124 tag |= reg & OFW_PCI_PHYS_HI_REGISTERMASK;
125 OF_call_method("config-l!", pc->pc_ihandle, 2, 0, data, tag);
126 }
127