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
|
/*
* MEN Chameleon Bus.
*
* Copyright (C) 2014 MEN Mikroelektronik GmbH (www.men.de)
* Author: Johannes Thumshirn <johannes.thumshirn@men.de>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; version 2 of the License.
*/
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/mcb.h>
#include "mcb-internal.h"
struct priv {
struct mcb_bus *bus;
phys_addr_t mapbase;
void __iomem *base;
};
static int mcb_pci_get_irq(struct mcb_device *mdev)
{
struct mcb_bus *mbus = mdev->bus;
struct device *dev = mbus->carrier;
struct pci_dev *pdev = to_pci_dev(dev);
return pdev->irq;
}
static int mcb_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
struct resource *res;
struct priv *priv;
int ret;
unsigned long flags;
priv = devm_kzalloc(&pdev->dev, sizeof(struct priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
ret = pci_enable_device(pdev);
if (ret) {
dev_err(&pdev->dev, "Failed to enable PCI device\n");
return -ENODEV;
}
priv->mapbase = pci_resource_start(pdev, 0);
if (!priv->mapbase) {
dev_err(&pdev->dev, "No PCI resource\n");
ret = -ENODEV;
goto out_disable;
}
res = devm_request_mem_region(&pdev->dev, priv->mapbase,
CHAM_HEADER_SIZE,
KBUILD_MODNAME);
if (!res) {
dev_err(&pdev->dev, "Failed to request PCI memory\n");
ret = -EBUSY;
goto out_disable;
}
priv->base = devm_ioremap(&pdev->dev, priv->mapbase, CHAM_HEADER_SIZE);
if (!priv->base) {
dev_err(&pdev->dev, "Cannot ioremap\n");
ret = -ENOMEM;
goto out_disable;
}
flags = pci_resource_flags(pdev, 0);
if (flags & IORESOURCE_IO) {
ret = -ENOTSUPP;
dev_err(&pdev->dev,
"IO mapped PCI devices are not supported\n");
goto out_disable;
}
pci_set_drvdata(pdev, priv);
priv->bus = mcb_alloc_bus(&pdev->dev);
if (IS_ERR(priv->bus)) {
ret = PTR_ERR(priv->bus);
goto out_disable;
}
priv->bus->get_irq = mcb_pci_get_irq;
ret = chameleon_parse_cells(priv->bus, priv->mapbase, priv->base);
if (ret < 0)
goto out_mcb_bus;
dev_dbg(&pdev->dev, "Found %d cells\n", ret);
mcb_bus_add_devices(priv->bus);
return 0;
out_mcb_bus:
mcb_release_bus(priv->bus);
out_disable:
pci_disable_device(pdev);
return ret;
}
static void mcb_pci_remove(struct pci_dev *pdev)
{
struct priv *priv = pci_get_drvdata(pdev);
mcb_release_bus(priv->bus);
pci_disable_device(pdev);
}
static const struct pci_device_id mcb_pci_tbl[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_MEN, PCI_DEVICE_ID_MEN_CHAMELEON) },
{ 0 },
};
MODULE_DEVICE_TABLE(pci, mcb_pci_tbl);
static struct pci_driver mcb_pci_driver = {
.name = "mcb-pci",
.id_table = mcb_pci_tbl,
.probe = mcb_pci_probe,
.remove = mcb_pci_remove,
};
module_pci_driver(mcb_pci_driver);
MODULE_AUTHOR("Johannes Thumshirn <johannes.thumshirn@men.de>");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("MCB over PCI support");
|
