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
172
|
/*
* UIO driver for Hilscher NetX based fieldbus cards (cifX, comX).
* See http://www.hilscher.com for details.
*
* (C) 2007 Hans J. Koch <hjk@linutronix.de>
* (C) 2008 Manuel Traut <manut@linutronix.de>
*
* Licensed under GPL version 2 only.
*
*/
#include <linux/device.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/uio_driver.h>
#define PCI_VENDOR_ID_HILSCHER 0x15CF
#define PCI_DEVICE_ID_HILSCHER_NETX 0x0000
#define PCI_SUBDEVICE_ID_NXSB_PCA 0x3235
#define PCI_SUBDEVICE_ID_NXPCA 0x3335
#define DPM_HOST_INT_EN0 0xfff0
#define DPM_HOST_INT_STAT0 0xffe0
#define DPM_HOST_INT_MASK 0xe600ffff
#define DPM_HOST_INT_GLOBAL_EN 0x80000000
static irqreturn_t netx_handler(int irq, struct uio_info *dev_info)
{
void __iomem *int_enable_reg = dev_info->mem[0].internal_addr
+ DPM_HOST_INT_EN0;
void __iomem *int_status_reg = dev_info->mem[0].internal_addr
+ DPM_HOST_INT_STAT0;
/* Is one of our interrupts enabled and active ? */
if (!(ioread32(int_enable_reg) & ioread32(int_status_reg)
& DPM_HOST_INT_MASK))
return IRQ_NONE;
/* Disable interrupt */
iowrite32(ioread32(int_enable_reg) & ~DPM_HOST_INT_GLOBAL_EN,
int_enable_reg);
return IRQ_HANDLED;
}
static int __devinit netx_pci_probe(struct pci_dev *dev,
const struct pci_device_id *id)
{
struct uio_info *info;
int bar;
info = kzalloc(sizeof(struct uio_info), GFP_KERNEL);
if (!info)
return -ENOMEM;
if (pci_enable_device(dev))
goto out_free;
if (pci_request_regions(dev, "netx"))
goto out_disable;
switch (id->device) {
case PCI_DEVICE_ID_HILSCHER_NETX:
bar = 0;
info->name = "netx";
break;
default:
bar = 2;
info->name = "netx_plx";
}
/* BAR0 or 2 points to the card's dual port memory */
info->mem[0].addr = pci_resource_start(dev, bar);
if (!info->mem[0].addr)
goto out_release;
info->mem[0].internal_addr = ioremap(pci_resource_start(dev, bar),
pci_resource_len(dev, bar));
if (!info->mem[0].internal_addr)
goto out_release;
info->mem[0].size = pci_resource_len(dev, bar);
info->mem[0].memtype = UIO_MEM_PHYS;
info->irq = dev->irq;
info->irq_flags = IRQF_SHARED;
info->handler = netx_handler;
info->version = "0.0.1";
/* Make sure all interrupts are disabled */
iowrite32(0, info->mem[0].internal_addr + DPM_HOST_INT_EN0);
if (uio_register_device(&dev->dev, info))
goto out_unmap;
pci_set_drvdata(dev, info);
dev_info(&dev->dev, "Found %s card, registered UIO device.\n",
info->name);
return 0;
out_unmap:
iounmap(info->mem[0].internal_addr);
out_release:
pci_release_regions(dev);
out_disable:
pci_disable_device(dev);
out_free:
kfree(info);
return -ENODEV;
}
static void netx_pci_remove(struct pci_dev *dev)
{
struct uio_info *info = pci_get_drvdata(dev);
/* Disable all interrupts */
iowrite32(0, info->mem[0].internal_addr + DPM_HOST_INT_EN0);
uio_unregister_device(info);
pci_release_regions(dev);
pci_disable_device(dev);
pci_set_drvdata(dev, NULL);
iounmap(info->mem[0].internal_addr);
kfree(info);
}
static struct pci_device_id netx_pci_ids[] = {
{
.vendor = PCI_VENDOR_ID_HILSCHER,
.device = PCI_DEVICE_ID_HILSCHER_NETX,
.subvendor = 0,
.subdevice = 0,
},
{
.vendor = PCI_VENDOR_ID_PLX,
.device = PCI_DEVICE_ID_PLX_9030,
.subvendor = PCI_VENDOR_ID_PLX,
.subdevice = PCI_SUBDEVICE_ID_NXSB_PCA,
},
{
.vendor = PCI_VENDOR_ID_PLX,
.device = PCI_DEVICE_ID_PLX_9030,
.subvendor = PCI_VENDOR_ID_PLX,
.subdevice = PCI_SUBDEVICE_ID_NXPCA,
},
{ 0, }
};
static struct pci_driver netx_pci_driver = {
.name = "netx",
.id_table = netx_pci_ids,
.probe = netx_pci_probe,
.remove = netx_pci_remove,
};
static int __init netx_init_module(void)
{
return pci_register_driver(&netx_pci_driver);
}
static void __exit netx_exit_module(void)
{
pci_unregister_driver(&netx_pci_driver);
}
module_init(netx_init_module);
module_exit(netx_exit_module);
MODULE_DEVICE_TABLE(pci, netx_pci_ids);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Hans J. Koch, Manuel Traut");
|
