1// SPDX-License-Identifier: GPL-2.0
2/*
3 * UIO Hilscher CIF card driver
4 *
5 * (C) 2007 Hans J. Koch <hjk@hansjkoch.de>
6 * Original code (C) 2005 Benedikt Spranger <b.spranger@linutronix.de>
7 */
8
9#include <linux/device.h>
10#include <linux/module.h>
11#include <linux/pci.h>
12#include <linux/slab.h>
13#include <linux/uio_driver.h>
14
15#include <asm/io.h>
16
17#define PLX9030_INTCSR 0x4C
18#define INTSCR_INT1_ENABLE 0x01
19#define INTSCR_INT1_STATUS 0x04
20#define INT1_ENABLED_AND_ACTIVE (INTSCR_INT1_ENABLE | INTSCR_INT1_STATUS)
21
22#define PCI_SUBVENDOR_ID_PEP 0x1518
23#define CIF_SUBDEVICE_PROFIBUS 0x430
24#define CIF_SUBDEVICE_DEVICENET 0x432
25
26
27static irqreturn_t hilscher_handler(int irq, struct uio_info *dev_info)
28{
29 void __iomem *plx_intscr = dev_info->mem[0].internal_addr
30 + PLX9030_INTCSR;
31
32 if ((ioread8(plx_intscr) & INT1_ENABLED_AND_ACTIVE)
33 != INT1_ENABLED_AND_ACTIVE)
34 return IRQ_NONE;
35
36 /* Disable interrupt */
37 iowrite8(ioread8(plx_intscr) & ~INTSCR_INT1_ENABLE, plx_intscr);
38 return IRQ_HANDLED;
39}
40
41static int hilscher_pci_probe(struct pci_dev *dev,
42 const struct pci_device_id *id)
43{
44 struct uio_info *info;
45
46 info = kzalloc(sizeof(struct uio_info), GFP_KERNEL);
47 if (!info)
48 return -ENOMEM;
49
50 if (pci_enable_device(dev))
51 goto out_free;
52
53 if (pci_request_regions(dev, "hilscher"))
54 goto out_disable;
55
56 info->mem[0].addr = pci_resource_start(dev, 0);
57 if (!info->mem[0].addr)
58 goto out_release;
59 info->mem[0].internal_addr = pci_ioremap_bar(dev, 0);
60 if (!info->mem[0].internal_addr)
61 goto out_release;
62
63 info->mem[0].size = pci_resource_len(dev, 0);
64 info->mem[0].memtype = UIO_MEM_PHYS;
65 info->mem[1].addr = pci_resource_start(dev, 2);
66 info->mem[1].size = pci_resource_len(dev, 2);
67 info->mem[1].memtype = UIO_MEM_PHYS;
68 switch (id->subdevice) {
69 case CIF_SUBDEVICE_PROFIBUS:
70 info->name = "CIF_Profibus";
71 break;
72 case CIF_SUBDEVICE_DEVICENET:
73 info->name = "CIF_Devicenet";
74 break;
75 default:
76 info->name = "CIF_???";
77 }
78 info->version = "0.0.1";
79 info->irq = dev->irq;
80 info->irq_flags = IRQF_SHARED;
81 info->handler = hilscher_handler;
82
83 if (uio_register_device(&dev->dev, info))
84 goto out_unmap;
85
86 pci_set_drvdata(dev, info);
87
88 return 0;
89out_unmap:
90 iounmap(info->mem[0].internal_addr);
91out_release:
92 pci_release_regions(dev);
93out_disable:
94 pci_disable_device(dev);
95out_free:
96 kfree (info);
97 return -ENODEV;
98}
99
100static void hilscher_pci_remove(struct pci_dev *dev)
101{
102 struct uio_info *info = pci_get_drvdata(dev);
103
104 uio_unregister_device(info);
105 pci_release_regions(dev);
106 pci_disable_device(dev);
107 iounmap(info->mem[0].internal_addr);
108
109 kfree (info);
110}
111
112static struct pci_device_id hilscher_pci_ids[] = {
113 {
114 .vendor = PCI_VENDOR_ID_PLX,
115 .device = PCI_DEVICE_ID_PLX_9030,
116 .subvendor = PCI_SUBVENDOR_ID_PEP,
117 .subdevice = CIF_SUBDEVICE_PROFIBUS,
118 },
119 {
120 .vendor = PCI_VENDOR_ID_PLX,
121 .device = PCI_DEVICE_ID_PLX_9030,
122 .subvendor = PCI_SUBVENDOR_ID_PEP,
123 .subdevice = CIF_SUBDEVICE_DEVICENET,
124 },
125 { 0, }
126};
127
128static struct pci_driver hilscher_pci_driver = {
129 .name = "hilscher",
130 .id_table = hilscher_pci_ids,
131 .probe = hilscher_pci_probe,
132 .remove = hilscher_pci_remove,
133};
134
135module_pci_driver(hilscher_pci_driver);
136MODULE_DEVICE_TABLE(pci, hilscher_pci_ids);
137MODULE_LICENSE("GPL v2");
138MODULE_AUTHOR("Hans J. Koch, Benedikt Spranger");
139