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3c2aabc4 AB |
1 | /* |
2 | * Support for the VMIVME-7805 board access to the Universe II bridge. | |
3 | * | |
4 | * Author: Arthur Benilov <arthur.benilov@iba-group.com> | |
5 | * Copyright 2010 Ion Beam Application, Inc. | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify it | |
8 | * under the terms of the GNU General Public License as published by the | |
9 | * Free Software Foundation; either version 2 of the License, or (at your | |
10 | * option) any later version. | |
11 | */ | |
12 | ||
3c2aabc4 AB |
13 | #include <linux/module.h> |
14 | #include <linux/types.h> | |
15 | #include <linux/errno.h> | |
16 | #include <linux/pci.h> | |
17 | #include <linux/poll.h> | |
18 | #include <linux/io.h> | |
19 | ||
20 | #include "vme_vmivme7805.h" | |
21 | ||
22 | static int __init vmic_init(void); | |
23 | static int vmic_probe(struct pci_dev *, const struct pci_device_id *); | |
24 | static void vmic_remove(struct pci_dev *); | |
25 | static void __exit vmic_exit(void); | |
26 | ||
27 | /** Base address to access FPGA register */ | |
28 | static void *vmic_base; | |
29 | ||
584721ca | 30 | static const char driver_name[] = "vmivme_7805"; |
3c2aabc4 | 31 | |
584721ca | 32 | static DEFINE_PCI_DEVICE_TABLE(vmic_ids) = { |
3c2aabc4 AB |
33 | { PCI_DEVICE(PCI_VENDOR_ID_VMIC, PCI_DEVICE_ID_VTIMR) }, |
34 | { }, | |
35 | }; | |
36 | ||
37 | static struct pci_driver vmic_driver = { | |
38 | .name = driver_name, | |
39 | .id_table = vmic_ids, | |
40 | .probe = vmic_probe, | |
41 | .remove = vmic_remove, | |
42 | }; | |
43 | ||
44 | static int __init vmic_init(void) | |
45 | { | |
46 | return pci_register_driver(&vmic_driver); | |
47 | } | |
48 | ||
49 | static int vmic_probe(struct pci_dev *pdev, const struct pci_device_id *id) | |
50 | { | |
51 | int retval; | |
52 | u32 data; | |
53 | ||
54 | /* Enable the device */ | |
55 | retval = pci_enable_device(pdev); | |
56 | if (retval) { | |
57 | dev_err(&pdev->dev, "Unable to enable device\n"); | |
58 | goto err; | |
59 | } | |
60 | ||
61 | /* Map Registers */ | |
62 | retval = pci_request_regions(pdev, driver_name); | |
63 | if (retval) { | |
64 | dev_err(&pdev->dev, "Unable to reserve resources\n"); | |
65 | goto err_resource; | |
66 | } | |
67 | ||
68 | /* Map registers in BAR 0 */ | |
69 | vmic_base = ioremap_nocache(pci_resource_start(pdev, 0), 16); | |
70 | if (!vmic_base) { | |
71 | dev_err(&pdev->dev, "Unable to remap CRG region\n"); | |
72 | retval = -EIO; | |
73 | goto err_remap; | |
74 | } | |
75 | ||
76 | /* Clear the FPGA VME IF contents */ | |
77 | iowrite32(0, vmic_base + VME_CONTROL); | |
78 | ||
79 | /* Clear any initial BERR */ | |
80 | data = ioread32(vmic_base + VME_CONTROL) & 0x00000FFF; | |
81 | data |= BM_VME_CONTROL_BERRST; | |
82 | iowrite32(data, vmic_base + VME_CONTROL); | |
83 | ||
84 | /* Enable the vme interface and byte swapping */ | |
85 | data = ioread32(vmic_base + VME_CONTROL) & 0x00000FFF; | |
86 | data = data | BM_VME_CONTROL_MASTER_ENDIAN | | |
87 | BM_VME_CONTROL_SLAVE_ENDIAN | | |
88 | BM_VME_CONTROL_ABLE | | |
89 | BM_VME_CONTROL_BERRI | | |
90 | BM_VME_CONTROL_BPENA | | |
91 | BM_VME_CONTROL_VBENA; | |
92 | iowrite32(data, vmic_base + VME_CONTROL); | |
93 | ||
94 | return 0; | |
95 | ||
96 | err_remap: | |
97 | pci_release_regions(pdev); | |
98 | err_resource: | |
99 | pci_disable_device(pdev); | |
100 | err: | |
101 | return retval; | |
102 | } | |
103 | ||
104 | static void vmic_remove(struct pci_dev *pdev) | |
105 | { | |
106 | iounmap(vmic_base); | |
107 | pci_release_regions(pdev); | |
108 | pci_disable_device(pdev); | |
109 | ||
110 | } | |
111 | ||
112 | static void __exit vmic_exit(void) | |
113 | { | |
114 | pci_unregister_driver(&vmic_driver); | |
115 | } | |
116 | ||
117 | MODULE_DESCRIPTION("VMIVME-7805 board support driver"); | |
118 | MODULE_AUTHOR("Arthur Benilov <arthur.benilov@iba-group.com>"); | |
119 | MODULE_LICENSE("GPL"); | |
120 | ||
121 | module_init(vmic_init); | |
122 | module_exit(vmic_exit); | |
123 |