// SPDX-License-Identifier: GPL-2.0 /* * UIO driver for Hilscher NetX based fieldbus cards (cifX, comX). * See http://www.hilscher.com for details. * * (C) 2007 Hans J. Koch <hjk@hansjkoch.de> * (C) 2008 Manuel Traut <manut@linutronix.de> * */ #include <linux/device.h> #include <linux/io.h> #include <linux/module.h> #include <linux/pci.h> #include <linux/slab.h> #include <linux/uio_driver.h> #define PCI_VENDOR_ID_HILSCHER 0x15CF #define PCI_DEVICE_ID_HILSCHER_NETX 0x0000 #define PCI_DEVICE_ID_HILSCHER_NETPLC 0x0010 #define PCI_SUBDEVICE_ID_NETPLC_RAM 0x0000 #define PCI_SUBDEVICE_ID_NETPLC_FLASH 0x0001 #define PCI_SUBDEVICE_ID_NXSB_PCA 0x3235 #define PCI_SUBDEVICE_ID_NXPCA 0x3335 #define DPM_HOST_INT_EN0 0xfff0 #define DPM_HOST_INT_STAT0 0xffe0 #define DPM_HOST_INT_MASK 0xe600ffff #define DPM_HOST_INT_GLOBAL_EN 0x80000000 static irqreturn_t netx_handler(int irq, struct uio_info *dev_info) { void __iomem *int_enable_reg = dev_info->mem[0].internal_addr + DPM_HOST_INT_EN0; void __iomem *int_status_reg = dev_info->mem[0].internal_addr + DPM_HOST_INT_STAT0; /* Is one of our interrupts enabled and active ? */ if (!(ioread32(int_enable_reg) & ioread32(int_status_reg) & DPM_HOST_INT_MASK)) return IRQ_NONE; /* Disable interrupt */ iowrite32(ioread32(int_enable_reg) & ~DPM_HOST_INT_GLOBAL_EN, int_enable_reg); return IRQ_HANDLED; } static int netx_pci_probe(struct pci_dev *dev, const struct pci_device_id *id) { struct uio_info *info; int bar; info = devm_kzalloc(&dev->dev, sizeof(struct uio_info), GFP_KERNEL); if (!info) return -ENOMEM; if (pci_enable_device(dev)) return -ENODEV; if (pci_request_regions(dev, "netx")) goto out_disable; switch (id->device) { case PCI_DEVICE_ID_HILSCHER_NETX: bar = 0; info->name = "netx"; break; case PCI_DEVICE_ID_HILSCHER_NETPLC: bar = 0; info->name = "netplc"; break; default: bar = 2; info->name = "netx_plx"; } /* BAR0 or 2 points to the card's dual port memory */ info->mem[0].addr = pci_resource_start(dev, bar); if (!info->mem[0].addr) goto out_release; info->mem[0].internal_addr = ioremap(pci_resource_start(dev, bar), pci_resource_len(dev, bar)); if (!info->mem[0].internal_addr) goto out_release; info->mem[0].size = pci_resource_len(dev, bar); info->mem[0].memtype = UIO_MEM_PHYS; info->irq = dev->irq; info->irq_flags = IRQF_SHARED; info->handler = netx_handler; info->version = "0.0.1"; /* Make sure all interrupts are disabled */ iowrite32(0, info->mem[0].internal_addr + DPM_HOST_INT_EN0); if (uio_register_device(&dev->dev, info)) goto out_unmap; pci_set_drvdata(dev, info); dev_info(&dev->dev, "Found %s card, registered UIO device.\n", info->name); return 0; out_unmap: iounmap(info->mem[0].internal_addr); out_release: pci_release_regions(dev); out_disable: pci_disable_device(dev); return -ENODEV; } static void netx_pci_remove(struct pci_dev *dev) { struct uio_info *info = pci_get_drvdata(dev); /* Disable all interrupts */ iowrite32(0, info->mem[0].internal_addr + DPM_HOST_INT_EN0); uio_unregister_device(info); pci_release_regions(dev); pci_disable_device(dev); iounmap(info->mem[0].internal_addr); } static struct pci_device_id netx_pci_ids[] = { { .vendor = PCI_VENDOR_ID_HILSCHER, .device = PCI_DEVICE_ID_HILSCHER_NETX, .subvendor = 0, .subdevice = 0, }, { .vendor = PCI_VENDOR_ID_HILSCHER, .device = PCI_DEVICE_ID_HILSCHER_NETPLC, .subvendor = PCI_VENDOR_ID_HILSCHER, .subdevice = PCI_SUBDEVICE_ID_NETPLC_RAM, }, { .vendor = PCI_VENDOR_ID_HILSCHER, .device = PCI_DEVICE_ID_HILSCHER_NETPLC, .subvendor = PCI_VENDOR_ID_HILSCHER, .subdevice = PCI_SUBDEVICE_ID_NETPLC_FLASH, }, { .vendor = PCI_VENDOR_ID_PLX, .device = PCI_DEVICE_ID_PLX_9030, .subvendor = PCI_VENDOR_ID_PLX, .subdevice = PCI_SUBDEVICE_ID_NXSB_PCA, }, { .vendor = PCI_VENDOR_ID_PLX, .device = PCI_DEVICE_ID_PLX_9030, .subvendor = PCI_VENDOR_ID_PLX, .subdevice = PCI_SUBDEVICE_ID_NXPCA, }, { 0, } }; static struct pci_driver netx_pci_driver = { .name = "netx", .id_table = netx_pci_ids, .probe = netx_pci_probe, .remove = netx_pci_remove, }; module_pci_driver(netx_pci_driver); MODULE_DEVICE_TABLE(pci, netx_pci_ids); MODULE_LICENSE("GPL v2"); MODULE_AUTHOR("Hans J. Koch, Manuel Traut");