1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
|
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 1995, 1996, 1997, 2002 by Ralf Baechle
* Copyright (C) 2001, 2002, 2003 by Liam Davies (ldavies@agile.tv)
*/
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <asm/pci.h>
#include <asm/io.h>
#include <asm/gt64120.h>
#include <asm/cobalt/cobalt.h>
/*
* Accessing device 31 hangs the GT64120. Not sure if this will also hang
* the GT64111, let's be paranoid for now.
*/
static inline int pci_range_ck(struct pci_bus *bus, unsigned int devfn)
{
if (bus->number == 0 && devfn == PCI_DEVFN(31, 0))
return -1;
return 0;
}
static int gt64111_pci_read_config(struct pci_bus *bus, unsigned int devfn,
int where, int size, u32 * val)
{
if (pci_range_ck(bus, devfn))
return PCIBIOS_DEVICE_NOT_FOUND;
switch (size) {
case 4:
PCI_CFG_SET(devfn, where);
*val = GALILEO_INL(GT_PCI0_CFGDATA_OFS);
return PCIBIOS_SUCCESSFUL;
case 2:
PCI_CFG_SET(devfn, (where & ~0x3));
*val = GALILEO_INL(GT_PCI0_CFGDATA_OFS)
>> ((where & 3) * 8);
return PCIBIOS_SUCCESSFUL;
case 1:
PCI_CFG_SET(devfn, (where & ~0x3));
*val = GALILEO_INL(GT_PCI0_CFGDATA_OFS)
>> ((where & 3) * 8);
return PCIBIOS_SUCCESSFUL;
}
return PCIBIOS_BAD_REGISTER_NUMBER;
}
static int gt64111_pci_write_config(struct pci_bus *bus, unsigned int devfn,
int where, int size, u32 val)
{
u32 tmp;
if (pci_range_ck(bus, devfn))
return PCIBIOS_DEVICE_NOT_FOUND;
switch (size) {
case 4:
PCI_CFG_SET(devfn, where);
GALILEO_OUTL(val, GT_PCI0_CFGDATA_OFS);
return PCIBIOS_SUCCESSFUL;
case 2:
PCI_CFG_SET(devfn, (where & ~0x3));
tmp = GALILEO_INL(GT_PCI0_CFGDATA_OFS);
tmp &= ~(0xffff << ((where & 0x3) * 8));
tmp |= (val << ((where & 0x3) * 8));
GALILEO_OUTL(tmp, GT_PCI0_CFGDATA_OFS);
return PCIBIOS_SUCCESSFUL;
case 1:
PCI_CFG_SET(devfn, (where & ~0x3));
tmp = GALILEO_INL(GT_PCI0_CFGDATA_OFS);
tmp &= ~(0xff << ((where & 0x3) * 8));
tmp |= (val << ((where & 0x3) * 8));
GALILEO_OUTL(tmp, GT_PCI0_CFGDATA_OFS);
return PCIBIOS_SUCCESSFUL;
}
return PCIBIOS_BAD_REGISTER_NUMBER;
}
struct pci_ops gt64111_pci_ops = {
.read = gt64111_pci_read_config,
.write = gt64111_pci_write_config,
};
|
