UIO: fix Greg's stupid changes
[linux-3.10.git] / drivers / uio / uio_cif.c
1 /*
2  * UIO Hilscher CIF card driver
3  *
4  * (C) 2007 Hans J. Koch <hjk@linutronix.de>
5  * Original code (C) 2005 Benedikt Spranger <b.spranger@linutronix.de>
6  *
7  * Licensed under GPL version 2 only.
8  *
9  */
10
11 #include <linux/device.h>
12 #include <linux/module.h>
13 #include <linux/pci.h>
14 #include <linux/uio_driver.h>
15
16 #include <asm/io.h>
17
18 #ifndef PCI_DEVICE_ID_PLX_9030
19 #define PCI_DEVICE_ID_PLX_9030  0x9030
20 #endif
21
22 #define PLX9030_INTCSR          0x4C
23 #define INTSCR_INT1_ENABLE      0x01
24 #define INTSCR_INT1_STATUS      0x04
25 #define INT1_ENABLED_AND_ACTIVE (INTSCR_INT1_ENABLE | INTSCR_INT1_STATUS)
26
27 #define PCI_SUBVENDOR_ID_PEP    0x1518
28 #define CIF_SUBDEVICE_PROFIBUS  0x430
29 #define CIF_SUBDEVICE_DEVICENET 0x432
30
31
32 static irqreturn_t hilscher_handler(int irq, struct uio_info *dev_info)
33 {
34         void __iomem *plx_intscr = dev_info->mem[0].internal_addr
35                                         + PLX9030_INTCSR;
36
37         if ((ioread8(plx_intscr) & INT1_ENABLED_AND_ACTIVE)
38             != INT1_ENABLED_AND_ACTIVE)
39                 return IRQ_NONE;
40
41         /* Disable interrupt */
42         iowrite8(ioread8(plx_intscr) & ~INTSCR_INT1_ENABLE, plx_intscr);
43         return IRQ_HANDLED;
44 }
45
46 static int __devinit hilscher_pci_probe(struct pci_dev *dev,
47                                         const struct pci_device_id *id)
48 {
49         struct uio_info *info;
50
51         info = kzalloc(sizeof(struct uio_info), GFP_KERNEL);
52         if (!info)
53                 return -ENOMEM;
54
55         if (pci_enable_device(dev))
56                 goto out_free;
57
58         if (pci_request_regions(dev, "hilscher"))
59                 goto out_disable;
60
61         info->mem[0].addr = pci_resource_start(dev, 0);
62         if (!info->mem[0].addr)
63                 goto out_release;
64         info->mem[0].internal_addr = ioremap(pci_resource_start(dev, 0),
65                                              pci_resource_len(dev, 0));
66         if (!info->mem[0].internal_addr)
67                 goto out_release;
68
69         info->mem[0].size = pci_resource_len(dev, 0);
70         info->mem[0].memtype = UIO_MEM_PHYS;
71         info->mem[1].addr = pci_resource_start(dev, 2);
72         info->mem[1].size = pci_resource_len(dev, 2);
73         info->mem[1].memtype = UIO_MEM_PHYS;
74         switch (id->subdevice) {
75                 case CIF_SUBDEVICE_PROFIBUS:
76                         info->name = "CIF_Profibus";
77                         break;
78                 case CIF_SUBDEVICE_DEVICENET:
79                         info->name = "CIF_Devicenet";
80                         break;
81                 default:
82                         info->name = "CIF_???";
83         }
84         info->version = "0.0.1";
85         info->irq = dev->irq;
86         info->irq_flags = IRQF_DISABLED | IRQF_SHARED;
87         info->handler = hilscher_handler;
88
89         if (uio_register_device(&dev->dev, info))
90                 goto out_unmap;
91
92         pci_set_drvdata(dev, info);
93
94         return 0;
95 out_unmap:
96         iounmap(info->mem[0].internal_addr);
97 out_release:
98         pci_release_regions(dev);
99 out_disable:
100         pci_disable_device(dev);
101 out_free:
102         kfree (info);
103         return -ENODEV;
104 }
105
106 static void hilscher_pci_remove(struct pci_dev *dev)
107 {
108         struct uio_info *info = pci_get_drvdata(dev);
109
110         uio_unregister_device(info);
111         pci_release_regions(dev);
112         pci_disable_device(dev);
113         pci_set_drvdata(dev, NULL);
114         iounmap(info->mem[0].internal_addr);
115
116         kfree (info);
117 }
118
119 static struct pci_device_id hilscher_pci_ids[] = {
120         {
121                 .vendor =       PCI_VENDOR_ID_PLX,
122                 .device =       PCI_DEVICE_ID_PLX_9030,
123                 .subvendor =    PCI_SUBVENDOR_ID_PEP,
124                 .subdevice =    CIF_SUBDEVICE_PROFIBUS,
125         },
126         {
127                 .vendor =       PCI_VENDOR_ID_PLX,
128                 .device =       PCI_DEVICE_ID_PLX_9030,
129                 .subvendor =    PCI_SUBVENDOR_ID_PEP,
130                 .subdevice =    CIF_SUBDEVICE_DEVICENET,
131         },
132         { 0, }
133 };
134
135 static struct pci_driver hilscher_pci_driver = {
136         .name = "hilscher",
137         .id_table = hilscher_pci_ids,
138         .probe = hilscher_pci_probe,
139         .remove = hilscher_pci_remove,
140 };
141
142 static int __init hilscher_init_module(void)
143 {
144         return pci_register_driver(&hilscher_pci_driver);
145 }
146
147 static void __exit hilscher_exit_module(void)
148 {
149         pci_unregister_driver(&hilscher_pci_driver);
150 }
151
152 module_init(hilscher_init_module);
153 module_exit(hilscher_exit_module);
154
155 MODULE_LICENSE("GPL v2");
156 MODULE_AUTHOR("Hans J. Koch, Benedikt Spranger");