1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * UIO Hilscher CIF card driver 4 * 5 * (C) 2007 Hans J. Koch <hjk@hansjkoch.de> 6 * Original code (C) 2005 Benedikt Spranger <b.spranger@linutronix.de> 7 */ 8 9 #include <linux/device.h> 10 #include <linux/module.h> 11 #include <linux/pci.h> 12 #include <linux/slab.h> 13 #include <linux/uio_driver.h> 14 15 #include <asm/io.h> 16 17 #define PLX9030_INTCSR 0x4C 18 #define INTSCR_INT1_ENABLE 0x01 19 #define INTSCR_INT1_STATUS 0x04 20 #define INT1_ENABLED_AND_ACTIVE (INTSCR_INT1_ENABLE | INTSCR_INT1_STATUS) 21 22 #define PCI_SUBVENDOR_ID_PEP 0x1518 23 #define CIF_SUBDEVICE_PROFIBUS 0x430 24 #define CIF_SUBDEVICE_DEVICENET 0x432 25 26 27 static irqreturn_t hilscher_handler(int irq, struct uio_info *dev_info) 28 { 29 void __iomem *plx_intscr = dev_info->mem[0].internal_addr 30 + PLX9030_INTCSR; 31 32 if ((ioread8(plx_intscr) & INT1_ENABLED_AND_ACTIVE) 33 != INT1_ENABLED_AND_ACTIVE) 34 return IRQ_NONE; 35 36 /* Disable interrupt */ 37 iowrite8(ioread8(plx_intscr) & ~INTSCR_INT1_ENABLE, plx_intscr); 38 return IRQ_HANDLED; 39 } 40 41 static int hilscher_pci_probe(struct pci_dev *dev, 42 const struct pci_device_id *id) 43 { 44 struct uio_info *info; 45 46 info = devm_kzalloc(&dev->dev, sizeof(struct uio_info), GFP_KERNEL); 47 if (!info) 48 return -ENOMEM; 49 50 if (pci_enable_device(dev)) 51 return -ENODEV; 52 53 if (pci_request_regions(dev, "hilscher")) 54 goto out_disable; 55 56 info->mem[0].addr = pci_resource_start(dev, 0); 57 if (!info->mem[0].addr) 58 goto out_release; 59 info->mem[0].internal_addr = pci_ioremap_bar(dev, 0); 60 if (!info->mem[0].internal_addr) 61 goto out_release; 62 63 info->mem[0].size = pci_resource_len(dev, 0); 64 info->mem[0].memtype = UIO_MEM_PHYS; 65 info->mem[1].addr = pci_resource_start(dev, 2); 66 info->mem[1].size = pci_resource_len(dev, 2); 67 info->mem[1].memtype = UIO_MEM_PHYS; 68 switch (id->subdevice) { 69 case CIF_SUBDEVICE_PROFIBUS: 70 info->name = "CIF_Profibus"; 71 break; 72 case CIF_SUBDEVICE_DEVICENET: 73 info->name = "CIF_Devicenet"; 74 break; 75 default: 76 info->name = "CIF_???"; 77 } 78 info->version = "0.0.1"; 79 info->irq = dev->irq; 80 info->irq_flags = IRQF_SHARED; 81 info->handler = hilscher_handler; 82 83 if (uio_register_device(&dev->dev, info)) 84 goto out_unmap; 85 86 pci_set_drvdata(dev, info); 87 88 return 0; 89 out_unmap: 90 iounmap(info->mem[0].internal_addr); 91 out_release: 92 pci_release_regions(dev); 93 out_disable: 94 pci_disable_device(dev); 95 return -ENODEV; 96 } 97 98 static void hilscher_pci_remove(struct pci_dev *dev) 99 { 100 struct uio_info *info = pci_get_drvdata(dev); 101 102 uio_unregister_device(info); 103 pci_release_regions(dev); 104 pci_disable_device(dev); 105 iounmap(info->mem[0].internal_addr); 106 } 107 108 static struct pci_device_id hilscher_pci_ids[] = { 109 { 110 .vendor = PCI_VENDOR_ID_PLX, 111 .device = PCI_DEVICE_ID_PLX_9030, 112 .subvendor = PCI_SUBVENDOR_ID_PEP, 113 .subdevice = CIF_SUBDEVICE_PROFIBUS, 114 }, 115 { 116 .vendor = PCI_VENDOR_ID_PLX, 117 .device = PCI_DEVICE_ID_PLX_9030, 118 .subvendor = PCI_SUBVENDOR_ID_PEP, 119 .subdevice = CIF_SUBDEVICE_DEVICENET, 120 }, 121 { 0, } 122 }; 123 124 static struct pci_driver hilscher_pci_driver = { 125 .name = "hilscher", 126 .id_table = hilscher_pci_ids, 127 .probe = hilscher_pci_probe, 128 .remove = hilscher_pci_remove, 129 }; 130 131 module_pci_driver(hilscher_pci_driver); 132 MODULE_DEVICE_TABLE(pci, hilscher_pci_ids); 133 MODULE_LICENSE("GPL v2"); 134 MODULE_AUTHOR("Hans J. Koch, Benedikt Spranger"); 135