| Arthur Benilov | 3c2aabc | 2010-02-16 15:41:51 +0100 | [diff] [blame^] | 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 | |
| 13 | #include <linux/version.h> |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/types.h> |
| 16 | #include <linux/errno.h> |
| 17 | #include <linux/pci.h> |
| 18 | #include <linux/poll.h> |
| 19 | #include <linux/io.h> |
| 20 | |
| 21 | #include "vme_vmivme7805.h" |
| 22 | |
| 23 | static int __init vmic_init(void); |
| 24 | static int vmic_probe(struct pci_dev *, const struct pci_device_id *); |
| 25 | static void vmic_remove(struct pci_dev *); |
| 26 | static void __exit vmic_exit(void); |
| 27 | |
| 28 | /** Base address to access FPGA register */ |
| 29 | static void *vmic_base; |
| 30 | |
| 31 | static char driver_name[] = "vmivme_7805"; |
| 32 | |
| 33 | static struct pci_device_id vmic_ids[] = { |
| 34 | { PCI_DEVICE(PCI_VENDOR_ID_VMIC, PCI_DEVICE_ID_VTIMR) }, |
| 35 | { }, |
| 36 | }; |
| 37 | |
| 38 | static struct pci_driver vmic_driver = { |
| 39 | .name = driver_name, |
| 40 | .id_table = vmic_ids, |
| 41 | .probe = vmic_probe, |
| 42 | .remove = vmic_remove, |
| 43 | }; |
| 44 | |
| 45 | static int __init vmic_init(void) |
| 46 | { |
| 47 | return pci_register_driver(&vmic_driver); |
| 48 | } |
| 49 | |
| 50 | static int vmic_probe(struct pci_dev *pdev, const struct pci_device_id *id) |
| 51 | { |
| 52 | int retval; |
| 53 | u32 data; |
| 54 | |
| 55 | /* Enable the device */ |
| 56 | retval = pci_enable_device(pdev); |
| 57 | if (retval) { |
| 58 | dev_err(&pdev->dev, "Unable to enable device\n"); |
| 59 | goto err; |
| 60 | } |
| 61 | |
| 62 | /* Map Registers */ |
| 63 | retval = pci_request_regions(pdev, driver_name); |
| 64 | if (retval) { |
| 65 | dev_err(&pdev->dev, "Unable to reserve resources\n"); |
| 66 | goto err_resource; |
| 67 | } |
| 68 | |
| 69 | /* Map registers in BAR 0 */ |
| 70 | vmic_base = ioremap_nocache(pci_resource_start(pdev, 0), 16); |
| 71 | if (!vmic_base) { |
| 72 | dev_err(&pdev->dev, "Unable to remap CRG region\n"); |
| 73 | retval = -EIO; |
| 74 | goto err_remap; |
| 75 | } |
| 76 | |
| 77 | /* Clear the FPGA VME IF contents */ |
| 78 | iowrite32(0, vmic_base + VME_CONTROL); |
| 79 | |
| 80 | /* Clear any initial BERR */ |
| 81 | data = ioread32(vmic_base + VME_CONTROL) & 0x00000FFF; |
| 82 | data |= BM_VME_CONTROL_BERRST; |
| 83 | iowrite32(data, vmic_base + VME_CONTROL); |
| 84 | |
| 85 | /* Enable the vme interface and byte swapping */ |
| 86 | data = ioread32(vmic_base + VME_CONTROL) & 0x00000FFF; |
| 87 | data = data | BM_VME_CONTROL_MASTER_ENDIAN | |
| 88 | BM_VME_CONTROL_SLAVE_ENDIAN | |
| 89 | BM_VME_CONTROL_ABLE | |
| 90 | BM_VME_CONTROL_BERRI | |
| 91 | BM_VME_CONTROL_BPENA | |
| 92 | BM_VME_CONTROL_VBENA; |
| 93 | iowrite32(data, vmic_base + VME_CONTROL); |
| 94 | |
| 95 | return 0; |
| 96 | |
| 97 | err_remap: |
| 98 | pci_release_regions(pdev); |
| 99 | err_resource: |
| 100 | pci_disable_device(pdev); |
| 101 | err: |
| 102 | return retval; |
| 103 | } |
| 104 | |
| 105 | static void vmic_remove(struct pci_dev *pdev) |
| 106 | { |
| 107 | iounmap(vmic_base); |
| 108 | pci_release_regions(pdev); |
| 109 | pci_disable_device(pdev); |
| 110 | |
| 111 | } |
| 112 | |
| 113 | static void __exit vmic_exit(void) |
| 114 | { |
| 115 | pci_unregister_driver(&vmic_driver); |
| 116 | } |
| 117 | |
| 118 | MODULE_DESCRIPTION("VMIVME-7805 board support driver"); |
| 119 | MODULE_AUTHOR("Arthur Benilov <arthur.benilov@iba-group.com>"); |
| 120 | MODULE_LICENSE("GPL"); |
| 121 | |
| 122 | module_init(vmic_init); |
| 123 | module_exit(vmic_exit); |
| 124 | |