Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / staging / comedi / comedi_pci.c

diff --git a/kernel/drivers/staging/comedi/comedi_pci.c b/kernel/drivers/staging/comedi/comedi_pci.c
new file mode 100644 (file)
index 0000000..027f0f4
--- /dev/null
+++ b/kernel/drivers/staging/comedi/comedi_pci.c
@@ -0,0 +1,185 @@
+/*
+ * comedi_pci.c
+ * Comedi PCI driver specific functions.
+ *
+ * COMEDI - Linux Control and Measurement Device Interface
+ * Copyright (C) 1997-2000 David A. Schleef <ds@schleef.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/interrupt.h>
+
+#include "comedi_pci.h"
+
+/**
+ * comedi_to_pci_dev() - comedi_device pointer to pci_dev pointer.
+ * @dev: comedi_device struct
+ */
+struct pci_dev *comedi_to_pci_dev(struct comedi_device *dev)
+{
+       return dev->hw_dev ? to_pci_dev(dev->hw_dev) : NULL;
+}
+EXPORT_SYMBOL_GPL(comedi_to_pci_dev);
+
+/**
+ * comedi_pci_enable() - Enable the PCI device and request the regions.
+ * @dev: comedi_device struct
+ */
+int comedi_pci_enable(struct comedi_device *dev)
+{
+       struct pci_dev *pcidev = comedi_to_pci_dev(dev);
+       int rc;
+
+       if (!pcidev)
+               return -ENODEV;
+
+       rc = pci_enable_device(pcidev);
+       if (rc < 0)
+               return rc;
+
+       rc = pci_request_regions(pcidev, dev->board_name);
+       if (rc < 0)
+               pci_disable_device(pcidev);
+       else
+               dev->ioenabled = true;
+
+       return rc;
+}
+EXPORT_SYMBOL_GPL(comedi_pci_enable);
+
+/**
+ * comedi_pci_disable() - Release the regions and disable the PCI device.
+ * @dev: comedi_device struct
+ */
+void comedi_pci_disable(struct comedi_device *dev)
+{
+       struct pci_dev *pcidev = comedi_to_pci_dev(dev);
+
+       if (pcidev && dev->ioenabled) {
+               pci_release_regions(pcidev);
+               pci_disable_device(pcidev);
+       }
+       dev->ioenabled = false;
+}
+EXPORT_SYMBOL_GPL(comedi_pci_disable);
+
+/**
+ * comedi_pci_detach() - A generic (*detach) function for PCI drivers.
+ * @dev: comedi_device struct
+ */
+void comedi_pci_detach(struct comedi_device *dev)
+{
+       struct pci_dev *pcidev = comedi_to_pci_dev(dev);
+
+       if (!pcidev || !dev->ioenabled)
+               return;
+
+       if (dev->irq) {
+               free_irq(dev->irq, dev);
+               dev->irq = 0;
+       }
+       if (dev->mmio) {
+               iounmap(dev->mmio);
+               dev->mmio = NULL;
+       }
+       comedi_pci_disable(dev);
+}
+EXPORT_SYMBOL_GPL(comedi_pci_detach);
+
+/**
+ * comedi_pci_auto_config() - Configure/probe a comedi PCI driver.
+ * @pcidev: pci_dev struct
+ * @driver: comedi_driver struct
+ * @context: driver specific data, passed to comedi_auto_config()
+ *
+ * Typically called from the pci_driver (*probe) function.
+ */
+int comedi_pci_auto_config(struct pci_dev *pcidev,
+                          struct comedi_driver *driver,
+                          unsigned long context)
+{
+       return comedi_auto_config(&pcidev->dev, driver, context);
+}
+EXPORT_SYMBOL_GPL(comedi_pci_auto_config);
+
+/**
+ * comedi_pci_auto_unconfig() - Unconfigure/remove a comedi PCI driver.
+ * @pcidev: pci_dev struct
+ *
+ * Typically called from the pci_driver (*remove) function.
+ */
+void comedi_pci_auto_unconfig(struct pci_dev *pcidev)
+{
+       comedi_auto_unconfig(&pcidev->dev);
+}
+EXPORT_SYMBOL_GPL(comedi_pci_auto_unconfig);
+
+/**
+ * comedi_pci_driver_register() - Register a comedi PCI driver.
+ * @comedi_driver: comedi_driver struct
+ * @pci_driver: pci_driver struct
+ *
+ * This function is used for the module_init() of comedi PCI drivers.
+ * Do not call it directly, use the module_comedi_pci_driver() helper
+ * macro instead.
+ */
+int comedi_pci_driver_register(struct comedi_driver *comedi_driver,
+                              struct pci_driver *pci_driver)
+{
+       int ret;
+
+       ret = comedi_driver_register(comedi_driver);
+       if (ret < 0)
+               return ret;
+
+       ret = pci_register_driver(pci_driver);
+       if (ret < 0) {
+               comedi_driver_unregister(comedi_driver);
+               return ret;
+       }
+
+       return 0;
+}
+EXPORT_SYMBOL_GPL(comedi_pci_driver_register);
+
+/**
+ * comedi_pci_driver_unregister() - Unregister a comedi PCI driver.
+ * @comedi_driver: comedi_driver struct
+ * @pci_driver: pci_driver struct
+ *
+ * This function is used for the module_exit() of comedi PCI drivers.
+ * Do not call it directly, use the module_comedi_pci_driver() helper
+ * macro instead.
+ */
+void comedi_pci_driver_unregister(struct comedi_driver *comedi_driver,
+                                 struct pci_driver *pci_driver)
+{
+       pci_unregister_driver(pci_driver);
+       comedi_driver_unregister(comedi_driver);
+}
+EXPORT_SYMBOL_GPL(comedi_pci_driver_unregister);
+
+static int __init comedi_pci_init(void)
+{
+       return 0;
+}
+module_init(comedi_pci_init);
+
+static void __exit comedi_pci_exit(void)
+{
+}
+module_exit(comedi_pci_exit);
+
+MODULE_AUTHOR("http://www.comedi.org");
+MODULE_DESCRIPTION("Comedi PCI interface module");
+MODULE_LICENSE("GPL");