135 lines
3.2 KiB
C
135 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* UIO Hilscher CIF card driver
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*
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* (C) 2007 Hans J. Koch <hjk@hansjkoch.de>
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* Original code (C) 2005 Benedikt Spranger <b.spranger@linutronix.de>
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*/
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#include <linux/device.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/slab.h>
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#include <linux/uio_driver.h>
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#include <asm/io.h>
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#define PLX9030_INTCSR 0x4C
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#define INTSCR_INT1_ENABLE 0x01
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#define INTSCR_INT1_STATUS 0x04
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#define INT1_ENABLED_AND_ACTIVE (INTSCR_INT1_ENABLE | INTSCR_INT1_STATUS)
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#define PCI_SUBVENDOR_ID_PEP 0x1518
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#define CIF_SUBDEVICE_PROFIBUS 0x430
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#define CIF_SUBDEVICE_DEVICENET 0x432
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static irqreturn_t hilscher_handler(int irq, struct uio_info *dev_info)
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{
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void __iomem *plx_intscr = dev_info->mem[0].internal_addr
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+ PLX9030_INTCSR;
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if ((ioread8(plx_intscr) & INT1_ENABLED_AND_ACTIVE)
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!= INT1_ENABLED_AND_ACTIVE)
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return IRQ_NONE;
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/* Disable interrupt */
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iowrite8(ioread8(plx_intscr) & ~INTSCR_INT1_ENABLE, plx_intscr);
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return IRQ_HANDLED;
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}
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static int hilscher_pci_probe(struct pci_dev *dev,
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const struct pci_device_id *id)
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{
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struct uio_info *info;
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info = devm_kzalloc(&dev->dev, sizeof(struct uio_info), GFP_KERNEL);
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if (!info)
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return -ENOMEM;
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if (pci_enable_device(dev))
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return -ENODEV;
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if (pci_request_regions(dev, "hilscher"))
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goto out_disable;
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info->mem[0].addr = pci_resource_start(dev, 0);
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if (!info->mem[0].addr)
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goto out_release;
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info->mem[0].internal_addr = pci_ioremap_bar(dev, 0);
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if (!info->mem[0].internal_addr)
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goto out_release;
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info->mem[0].size = pci_resource_len(dev, 0);
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info->mem[0].memtype = UIO_MEM_PHYS;
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info->mem[1].addr = pci_resource_start(dev, 2);
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info->mem[1].size = pci_resource_len(dev, 2);
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info->mem[1].memtype = UIO_MEM_PHYS;
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switch (id->subdevice) {
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case CIF_SUBDEVICE_PROFIBUS:
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info->name = "CIF_Profibus";
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break;
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case CIF_SUBDEVICE_DEVICENET:
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info->name = "CIF_Devicenet";
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break;
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default:
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info->name = "CIF_???";
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}
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info->version = "0.0.1";
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info->irq = dev->irq;
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info->irq_flags = IRQF_SHARED;
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info->handler = hilscher_handler;
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if (uio_register_device(&dev->dev, info))
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goto out_unmap;
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pci_set_drvdata(dev, info);
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return 0;
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out_unmap:
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iounmap(info->mem[0].internal_addr);
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out_release:
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pci_release_regions(dev);
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out_disable:
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pci_disable_device(dev);
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return -ENODEV;
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}
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static void hilscher_pci_remove(struct pci_dev *dev)
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{
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struct uio_info *info = pci_get_drvdata(dev);
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uio_unregister_device(info);
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pci_release_regions(dev);
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pci_disable_device(dev);
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iounmap(info->mem[0].internal_addr);
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}
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static struct pci_device_id hilscher_pci_ids[] = {
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{
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.vendor = PCI_VENDOR_ID_PLX,
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.device = PCI_DEVICE_ID_PLX_9030,
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.subvendor = PCI_SUBVENDOR_ID_PEP,
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.subdevice = CIF_SUBDEVICE_PROFIBUS,
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},
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{
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.vendor = PCI_VENDOR_ID_PLX,
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.device = PCI_DEVICE_ID_PLX_9030,
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.subvendor = PCI_SUBVENDOR_ID_PEP,
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.subdevice = CIF_SUBDEVICE_DEVICENET,
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},
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{ 0, }
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};
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static struct pci_driver hilscher_pci_driver = {
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.name = "hilscher",
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.id_table = hilscher_pci_ids,
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.probe = hilscher_pci_probe,
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.remove = hilscher_pci_remove,
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};
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module_pci_driver(hilscher_pci_driver);
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MODULE_DEVICE_TABLE(pci, hilscher_pci_ids);
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MODULE_LICENSE("GPL v2");
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MODULE_AUTHOR("Hans J. Koch, Benedikt Spranger");
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