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