3 files changed, 184 insertions, 0 deletions

diff --git a/drivers/uio/Kconfig b/drivers/uio/Kconfig
index 8aa1955f35ed..069b1443be6c 100644
--- a/drivers/uio/Kconfig
+++ b/drivers/uio/Kconfig
@@ -94,4 +94,15 @@ config UIO_PCI_GENERIC
           primarily, for virtualization scenarios.
           If you compile this as a module, it will be called uio_pci_generic.
 
+config UIO_NETX
+        tristate "Hilscher NetX Card driver"
+        depends on PCI
+        help
+          Driver for Hilscher NetX based fieldbus cards (cifX, comX).
+          This driver requires a userspace component that comes with the card
+          or is available from Hilscher (http://www.hilscher.com).
+
+          To compile this driver as a module, choose M here; the module
+          will be called uio_netx.
+
 endif
diff --git a/drivers/uio/Makefile b/drivers/uio/Makefile
index 73b2e7516729..aa7d0333fa78 100644
--- a/drivers/uio/Makefile
+++ b/drivers/uio/Makefile
@@ -6,3 +6,4 @@ obj-$(CONFIG_UIO_SMX)	+= uio_smx.o
 obj-$(CONFIG_UIO_AEC)   += uio_aec.o
 obj-$(CONFIG_UIO_SERCOS3)       += uio_sercos3.o
 obj-$(CONFIG_UIO_PCI_GENERIC)   += uio_pci_generic.o
+obj-$(CONFIG_UIO_NETX)  += uio_netx.o
diff --git a/drivers/uio/uio_netx.c b/drivers/uio/uio_netx.c
new file mode 100644
index 000000000000..afbf0bd55cc9
--- /dev/null
+++ b/drivers/uio/uio_netx.c
@@ -0,0 +1,172 @@
+/*
+ * UIO driver for Hilscher NetX based fieldbus cards (cifX, comX).
+ * See http://www.hilscher.com for details.
+ *
+ * (C) 2007 Hans J. Koch <hjk@linutronix.de>
+ * (C) 2008 Manuel Traut <manut@linutronix.de>
+ *
+ * Licensed under GPL version 2 only.
+ *
+ */
+
+#include <linux/device.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/uio_driver.h>
+
+#define PCI_VENDOR_ID_HILSCHER          0x15CF
+#define PCI_DEVICE_ID_HILSCHER_NETX     0x0000
+#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 __devinit netx_pci_probe(struct pci_dev *dev,
+                                        const struct pci_device_id *id)
+{
+        struct uio_info *info;
+        int bar;
+
+        info = kzalloc(sizeof(struct uio_info), GFP_KERNEL);
+        if (!info)
+                return -ENOMEM;
+
+        if (pci_enable_device(dev))
+                goto out_free;
+
+        if (pci_request_regions(dev, "netx"))
+                goto out_disable;
+
+        switch (id->device) {
+        case PCI_DEVICE_ID_HILSCHER_NETX:
+                bar = 0;
+                info->name = "netx";
+                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);
+out_free:
+        kfree(info);
+        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);
+        pci_set_drvdata(dev, NULL);
+        iounmap(info->mem[0].internal_addr);
+
+        kfree(info);
+}
+
+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_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,
+};
+
+static int __init netx_init_module(void)
+{
+        return pci_register_driver(&netx_pci_driver);
+}
+
+static void __exit netx_exit_module(void)
+{
+        pci_unregister_driver(&netx_pci_driver);
+}
+
+module_init(netx_init_module);
+module_exit(netx_exit_module);
+
+MODULE_DEVICE_TABLE(pci, netx_pci_ids);
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Hans J. Koch, Manuel Traut");