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| 1 | /* |
| 2 | * UIO driver for Hilscher NetX based fieldbus cards (cifX, comX). |
| 3 | * See http://www.hilscher.com for details. |
| 4 | * |
| 5 | * (C) 2007 Hans J. Koch <hjk@hansjkoch.de> |
| 6 | * (C) 2008 Manuel Traut <manut@linutronix.de> |
| 7 | * |
| 8 | * Licensed under GPL version 2 only. |
| 9 | * |
| 10 | */ |
| 11 | |
| 12 | #include <linux/device.h> |
| 13 | #include <linux/io.h> |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/pci.h> |
| 16 | #include <linux/slab.h> |
| 17 | #include <linux/uio_driver.h> |
| 18 | |
| 19 | #define PCI_VENDOR_ID_HILSCHER 0x15CF |
| 20 | #define PCI_DEVICE_ID_HILSCHER_NETX 0x0000 |
| 21 | #define PCI_DEVICE_ID_HILSCHER_NETPLC 0x0010 |
| 22 | #define PCI_SUBDEVICE_ID_NETPLC_RAM 0x0000 |
| 23 | #define PCI_SUBDEVICE_ID_NETPLC_FLASH 0x0001 |
| 24 | #define PCI_SUBDEVICE_ID_NXSB_PCA 0x3235 |
| 25 | #define PCI_SUBDEVICE_ID_NXPCA 0x3335 |
| 26 | |
| 27 | #define DPM_HOST_INT_EN0 0xfff0 |
| 28 | #define DPM_HOST_INT_STAT0 0xffe0 |
| 29 | |
| 30 | #define DPM_HOST_INT_MASK 0xe600ffff |
| 31 | #define DPM_HOST_INT_GLOBAL_EN 0x80000000 |
| 32 | |
| 33 | static irqreturn_t netx_handler(int irq, struct uio_info *dev_info) |
| 34 | { |
| 35 | void __iomem *int_enable_reg = dev_info->mem[0].internal_addr |
| 36 | + DPM_HOST_INT_EN0; |
| 37 | void __iomem *int_status_reg = dev_info->mem[0].internal_addr |
| 38 | + DPM_HOST_INT_STAT0; |
| 39 | |
| 40 | /* Is one of our interrupts enabled and active ? */ |
| 41 | if (!(ioread32(int_enable_reg) & ioread32(int_status_reg) |
| 42 | & DPM_HOST_INT_MASK)) |
| 43 | return IRQ_NONE; |
| 44 | |
| 45 | /* Disable interrupt */ |
| 46 | iowrite32(ioread32(int_enable_reg) & ~DPM_HOST_INT_GLOBAL_EN, |
| 47 | int_enable_reg); |
| 48 | return IRQ_HANDLED; |
| 49 | } |
| 50 | |
| 51 | static int __devinit netx_pci_probe(struct pci_dev *dev, |
| 52 | const struct pci_device_id *id) |
| 53 | { |
| 54 | struct uio_info *info; |
| 55 | int bar; |
| 56 | |
| 57 | info = kzalloc(sizeof(struct uio_info), GFP_KERNEL); |
| 58 | if (!info) |
| 59 | return -ENOMEM; |
| 60 | |
| 61 | if (pci_enable_device(dev)) |
| 62 | goto out_free; |
| 63 | |
| 64 | if (pci_request_regions(dev, "netx")) |
| 65 | goto out_disable; |
| 66 | |
| 67 | switch (id->device) { |
| 68 | case PCI_DEVICE_ID_HILSCHER_NETX: |
| 69 | bar = 0; |
| 70 | info->name = "netx"; |
| 71 | break; |
| 72 | case PCI_DEVICE_ID_HILSCHER_NETPLC: |
| 73 | bar = 0; |
| 74 | info->name = "netplc"; |
| 75 | break; |
| 76 | default: |
| 77 | bar = 2; |
| 78 | info->name = "netx_plx"; |
| 79 | } |
| 80 | |
| 81 | /* BAR0 or 2 points to the card's dual port memory */ |
| 82 | info->mem[0].addr = pci_resource_start(dev, bar); |
| 83 | if (!info->mem[0].addr) |
| 84 | goto out_release; |
| 85 | info->mem[0].internal_addr = ioremap(pci_resource_start(dev, bar), |
| 86 | pci_resource_len(dev, bar)); |
| 87 | |
| 88 | if (!info->mem[0].internal_addr) |
| 89 | goto out_release; |
| 90 | |
| 91 | info->mem[0].size = pci_resource_len(dev, bar); |
| 92 | info->mem[0].memtype = UIO_MEM_PHYS; |
| 93 | info->irq = dev->irq; |
| 94 | info->irq_flags = IRQF_SHARED; |
| 95 | info->handler = netx_handler; |
| 96 | info->version = "0.0.1"; |
| 97 | |
| 98 | /* Make sure all interrupts are disabled */ |
| 99 | iowrite32(0, info->mem[0].internal_addr + DPM_HOST_INT_EN0); |
| 100 | |
| 101 | if (uio_register_device(&dev->dev, info)) |
| 102 | goto out_unmap; |
| 103 | |
| 104 | pci_set_drvdata(dev, info); |
| 105 | dev_info(&dev->dev, "Found %s card, registered UIO device.\n", |
| 106 | info->name); |
| 107 | |
| 108 | return 0; |
| 109 | |
| 110 | out_unmap: |
| 111 | iounmap(info->mem[0].internal_addr); |
| 112 | out_release: |
| 113 | pci_release_regions(dev); |
| 114 | out_disable: |
| 115 | pci_disable_device(dev); |
| 116 | out_free: |
| 117 | kfree(info); |
| 118 | return -ENODEV; |
| 119 | } |
| 120 | |
| 121 | static void netx_pci_remove(struct pci_dev *dev) |
| 122 | { |
| 123 | struct uio_info *info = pci_get_drvdata(dev); |
| 124 | |
| 125 | /* Disable all interrupts */ |
| 126 | iowrite32(0, info->mem[0].internal_addr + DPM_HOST_INT_EN0); |
| 127 | uio_unregister_device(info); |
| 128 | pci_release_regions(dev); |
| 129 | pci_disable_device(dev); |
| 130 | pci_set_drvdata(dev, NULL); |
| 131 | iounmap(info->mem[0].internal_addr); |
| 132 | |
| 133 | kfree(info); |
| 134 | } |
| 135 | |
| 136 | static struct pci_device_id netx_pci_ids[] = { |
| 137 | { |
| 138 | .vendor = PCI_VENDOR_ID_HILSCHER, |
| 139 | .device = PCI_DEVICE_ID_HILSCHER_NETX, |
| 140 | .subvendor = 0, |
| 141 | .subdevice = 0, |
| 142 | }, |
| 143 | { |
| 144 | .vendor = PCI_VENDOR_ID_HILSCHER, |
| 145 | .device = PCI_DEVICE_ID_HILSCHER_NETPLC, |
| 146 | .subvendor = PCI_VENDOR_ID_HILSCHER, |
| 147 | .subdevice = PCI_SUBDEVICE_ID_NETPLC_RAM, |
| 148 | }, |
| 149 | { |
| 150 | .vendor = PCI_VENDOR_ID_HILSCHER, |
| 151 | .device = PCI_DEVICE_ID_HILSCHER_NETPLC, |
| 152 | .subvendor = PCI_VENDOR_ID_HILSCHER, |
| 153 | .subdevice = PCI_SUBDEVICE_ID_NETPLC_FLASH, |
| 154 | }, |
| 155 | { |
| 156 | .vendor = PCI_VENDOR_ID_PLX, |
| 157 | .device = PCI_DEVICE_ID_PLX_9030, |
| 158 | .subvendor = PCI_VENDOR_ID_PLX, |
| 159 | .subdevice = PCI_SUBDEVICE_ID_NXSB_PCA, |
| 160 | }, |
| 161 | { |
| 162 | .vendor = PCI_VENDOR_ID_PLX, |
| 163 | .device = PCI_DEVICE_ID_PLX_9030, |
| 164 | .subvendor = PCI_VENDOR_ID_PLX, |
| 165 | .subdevice = PCI_SUBDEVICE_ID_NXPCA, |
| 166 | }, |
| 167 | { 0, } |
| 168 | }; |
| 169 | |
| 170 | static struct pci_driver netx_pci_driver = { |
| 171 | .name = "netx", |
| 172 | .id_table = netx_pci_ids, |
| 173 | .probe = netx_pci_probe, |
| 174 | .remove = netx_pci_remove, |
| 175 | }; |
| 176 | |
| 177 | static int __init netx_init_module(void) |
| 178 | { |
| 179 | return pci_register_driver(&netx_pci_driver); |
| 180 | } |
| 181 | |
| 182 | static void __exit netx_exit_module(void) |
| 183 | { |
| 184 | pci_unregister_driver(&netx_pci_driver); |
| 185 | } |
| 186 | |
| 187 | module_init(netx_init_module); |
| 188 | module_exit(netx_exit_module); |
| 189 | |
| 190 | MODULE_DEVICE_TABLE(pci, netx_pci_ids); |
| 191 | MODULE_LICENSE("GPL v2"); |
| 192 | MODULE_AUTHOR("Hans J. Koch, Manuel Traut"); |
| 193 |
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Tags:
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