Commit | Line | Data |
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bc4c4f45 HJK |
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"); |