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
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
|
/*
* PCI bus setup for Marvell mv64360/mv64460 host bridges (Discovery)
*
* Author: Dale Farnsworth <dale@farnsworth.org>
*
* 2007 (c) MontaVista, Software, Inc. This file is licensed under
* the terms of the GNU General Public License version 2. This program
* is licensed "as is" without any warranty of any kind, whether express
* or implied.
*/
#include <linux/stddef.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/stat.h>
#include <linux/pci.h>
#include <asm/prom.h>
#include <asm/pci-bridge.h>
#define PCI_HEADER_TYPE_INVALID 0x7f /* Invalid PCI header type */
#ifdef CONFIG_SYSFS
/* 32-bit hex or dec stringified number + '\n' */
#define MV64X60_VAL_LEN_MAX 11
#define MV64X60_PCICFG_CPCI_HOTSWAP 0x68
static ssize_t mv64x60_hs_reg_read(struct file *filp, struct kobject *kobj,
struct bin_attribute *attr, char *buf,
loff_t off, size_t count)
{
struct pci_dev *phb;
u32 v;
if (off > 0)
return 0;
if (count < MV64X60_VAL_LEN_MAX)
return -EINVAL;
phb = pci_get_bus_and_slot(0, PCI_DEVFN(0, 0));
if (!phb)
return -ENODEV;
pci_read_config_dword(phb, MV64X60_PCICFG_CPCI_HOTSWAP, &v);
pci_dev_put(phb);
return sprintf(buf, "0x%08x\n", v);
}
static ssize_t mv64x60_hs_reg_write(struct file *filp, struct kobject *kobj,
struct bin_attribute *attr, char *buf,
loff_t off, size_t count)
{
struct pci_dev *phb;
u32 v;
if (off > 0)
return 0;
if (count <= 0)
return -EINVAL;
if (sscanf(buf, "%i", &v) != 1)
return -EINVAL;
phb = pci_get_bus_and_slot(0, PCI_DEVFN(0, 0));
if (!phb)
return -ENODEV;
pci_write_config_dword(phb, MV64X60_PCICFG_CPCI_HOTSWAP, v);
pci_dev_put(phb);
return count;
}
static const struct bin_attribute mv64x60_hs_reg_attr = { /* Hotswap register */
.attr = {
.name = "hs_reg",
.mode = S_IRUGO | S_IWUSR,
},
.size = MV64X60_VAL_LEN_MAX,
.read = mv64x60_hs_reg_read,
.write = mv64x60_hs_reg_write,
};
static int __init mv64x60_sysfs_init(void)
{
struct device_node *np;
struct platform_device *pdev;
const unsigned int *prop;
np = of_find_compatible_node(NULL, NULL, "marvell,mv64360");
if (!np)
return 0;
prop = of_get_property(np, "hs_reg_valid", NULL);
of_node_put(np);
pdev = platform_device_register_simple("marvell,mv64360", 0, NULL, 0);
if (IS_ERR(pdev))
return PTR_ERR(pdev);
return sysfs_create_bin_file(&pdev->dev.kobj, &mv64x60_hs_reg_attr);
}
subsys_initcall(mv64x60_sysfs_init);
#endif /* CONFIG_SYSFS */
static void mv64x60_pci_fixup_early(struct pci_dev *dev)
{
/*
* Set the host bridge hdr_type to an invalid value so that
* pci_setup_device() will ignore the host bridge.
*/
dev->hdr_type = PCI_HEADER_TYPE_INVALID;
}
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_MARVELL, PCI_DEVICE_ID_MARVELL_MV64360,
mv64x60_pci_fixup_early);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_MARVELL, PCI_DEVICE_ID_MARVELL_MV64460,
mv64x60_pci_fixup_early);
static int __init mv64x60_add_bridge(struct device_node *dev)
{
int len;
struct pci_controller *hose;
struct resource rsrc;
const int *bus_range;
int primary;
memset(&rsrc, 0, sizeof(rsrc));
/* Fetch host bridge registers address */
if (of_address_to_resource(dev, 0, &rsrc)) {
printk(KERN_ERR "No PCI reg property in device tree\n");
return -ENODEV;
}
/* Get bus range if any */
bus_range = of_get_property(dev, "bus-range", &len);
if (bus_range == NULL || len < 2 * sizeof(int))
printk(KERN_WARNING "Can't get bus-range for %pOF, assume"
" bus 0\n", dev);
hose = pcibios_alloc_controller(dev);
if (!hose)
return -ENOMEM;
hose->first_busno = bus_range ? bus_range[0] : 0;
hose->last_busno = bus_range ? bus_range[1] : 0xff;
setup_indirect_pci(hose, rsrc.start, rsrc.start + 4, 0);
hose->self_busno = hose->first_busno;
printk(KERN_INFO "Found MV64x60 PCI host bridge at 0x%016llx. "
"Firmware bus number: %d->%d\n",
(unsigned long long)rsrc.start, hose->first_busno,
hose->last_busno);
/* Interpret the "ranges" property */
/* This also maps the I/O region and sets isa_io/mem_base */
primary = (hose->first_busno == 0);
pci_process_bridge_OF_ranges(hose, dev, primary);
return 0;
}
void __init mv64x60_pci_init(void)
{
struct device_node *np;
for_each_compatible_node(np, "pci", "marvell,mv64360-pci")
mv64x60_add_bridge(np);
}
|
