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
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
|
/* $Id: pci.c,v 1.8 1999/10/09 00:00:59 ralf Exp $
*
* 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.
*
* SNI specific PCI support for RM200/RM300.
*
* Copyright (C) 1997, 1998, 1999 Ralf Baechle
*/
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/types.h>
#include <asm/byteorder.h>
#include <asm/sni.h>
#ifdef CONFIG_PCI
#define mkaddr(dev, where) \
do { \
if ((dev)->bus->number == 0) \
return -1; \
*(volatile u32 *)PCIMT_CONFIG_ADDRESS = \
((dev->bus->number & 0xff) << 0x10) | \
((dev->dev_fn & 0xff) << 0x08) | \
(where & 0xfc); \
} while(0);
/* To do: Bring this uptodate ... */
static void pcimt_pcibios_fixup (void)
{
struct pci_dev *dev;
for (dev=pci_devices; dev; dev=dev->next) {
/*
* TODO: Take care of RM300 revision D boards for where the
* network slot became an ordinary PCI slot.
*/
if (dev->devfn == PCI_DEVFN(1, 0)) {
/* Evil hack ... */
set_cp0_config(CONF_CM_CMASK, CONF_CM_CACHABLE_NO_WA);
dev->irq = PCIMT_IRQ_SCSI;
continue;
}
if (dev->devfn == PCI_DEVFN(2, 0)) {
dev->irq = PCIMT_IRQ_ETHERNET;
continue;
}
switch(dev->irq) {
case 1 ... 4:
dev->irq += PCIMT_IRQ_INTA - 1;
break;
case 0:
break;
default:
printk("PCI device on bus %d, dev %d, function %d "
"impossible interrupt configured.\n",
dev->bus->number, PCI_SLOT(dev->devfn),
PCI_SLOT(dev->devfn));
}
}
}
/*
* We can't address 8 and 16 bit words directly. Instead we have to
* read/write a 32bit word and mask/modify the data we actually want.
*/
static int pcimt_read_config_byte (struct pci_dev *dev,
int where, unsigned char *val)
{
u32 res;
mkaddr(dev, where);
res = *(volatile u32 *)PCIMT_CONFIG_DATA;
res = (le32_to_cpu(res) >> ((where & 3) << 3)) & 0xff;
*val = res;
return PCIBIOS_SUCCESSFUL;
}
static int pcimt_read_config_word (struct pci_dev *dev,
int where, unsigned short *val)
{
u32 res;
if (where & 1)
return PCIBIOS_BAD_REGISTER_NUMBER;
mkaddr(dev, where);
res = *(volatile u32 *)PCIMT_CONFIG_DATA;
res = (le32_to_cpu(res) >> ((where & 3) << 3)) & 0xffff;
*val = res;
return PCIBIOS_SUCCESSFUL;
}
static int pcimt_read_config_dword (struct pci_dev *dev,
int where, unsigned int *val)
{
u32 res;
if (where & 3)
return PCIBIOS_BAD_REGISTER_NUMBER;
mkaddr(dev, where);
res = *(volatile u32 *)PCIMT_CONFIG_DATA;
res = le32_to_cpu(res);
*val = res;
return PCIBIOS_SUCCESSFUL;
}
static int pcimt_write_config_byte (struct pci_dev *dev,
int where, unsigned char val)
{
mkaddr(dev, where);
*(volatile u8 *)(PCIMT_CONFIG_DATA + (where & 3)) = val;
return PCIBIOS_SUCCESSFUL;
}
static int pcimt_write_config_word (struct pci_dev *dev,
int where, unsigned short val)
{
if (where & 1)
return PCIBIOS_BAD_REGISTER_NUMBER;
mkaddr(dev, where);
*(volatile u16 *)(PCIMT_CONFIG_DATA + (where & 3)) = le16_to_cpu(val);
return PCIBIOS_SUCCESSFUL;
}
static int pcimt_write_config_dword (struct pci_dev *dev,
int where, unsigned int val)
{
if (where & 3)
return PCIBIOS_BAD_REGISTER_NUMBER;
mkaddr(dev, where);
*(volatile u32 *)PCIMT_CONFIG_DATA = le32_to_cpu(val);
return PCIBIOS_SUCCESSFUL;
}
struct pci_ops sni_pci_ops = {
pcimt_read_config_byte,
pcimt_read_config_word,
pcimt_read_config_dword,
pcimt_write_config_byte,
pcimt_write_config_word,
pcimt_write_config_dword
};
#endif /* CONFIG_PCI */
|
