diff options
Diffstat (limited to 'drivers/staging/comedi/comedi_pci.c')
| -rw-r--r-- | drivers/staging/comedi/comedi_pci.c | 228 |
1 files changed, 0 insertions, 228 deletions
diff --git a/drivers/staging/comedi/comedi_pci.c b/drivers/staging/comedi/comedi_pci.c deleted file mode 100644 index 54739af7eb71..000000000000 --- a/drivers/staging/comedi/comedi_pci.c +++ /dev/null @@ -1,228 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0+ -/* - * 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> - */ - -#include <linux/module.h> -#include <linux/interrupt.h> - -#include "comedi_pci.h" - -/** - * comedi_to_pci_dev() - Return PCI device attached to COMEDI device - * @dev: COMEDI device. - * - * Assuming @dev->hw_dev is non-%NULL, it is assumed to be pointing to a - * a &struct device embedded in a &struct pci_dev. - * - * Return: Attached PCI device if @dev->hw_dev is non-%NULL. - * Return %NULL if @dev->hw_dev is %NULL. - */ -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. - * - * Assuming @dev->hw_dev is non-%NULL, it is assumed to be pointing to a - * a &struct device embedded in a &struct pci_dev. Enable the PCI device - * and request its regions. Set @dev->ioenabled to %true if successful, - * otherwise undo what was done. - * - * Calls to comedi_pci_enable() and comedi_pci_disable() cannot be nested. - * - * Return: - * 0 on success, - * -%ENODEV if @dev->hw_dev is %NULL, - * -%EBUSY if regions busy, - * or some negative error number if failed to enable PCI device. - * - */ -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. - * - * Assuming @dev->hw_dev is non-%NULL, it is assumed to be pointing to a - * a &struct device embedded in a &struct pci_dev. If the earlier call - * to comedi_pci_enable() was successful, release the PCI device's regions - * and disable it. Reset @dev->ioenabled back to %false. - */ -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" handler for PCI COMEDI drivers - * @dev: COMEDI device. - * - * COMEDI drivers for PCI devices that need no special clean-up of private data - * and have no ioremapped regions other than that pointed to by @dev->mmio may - * use this function as its "detach" handler called by the COMEDI core when a - * COMEDI device is being detached from the low-level driver. It may be also - * called from a more specific "detach" handler that does additional clean-up. - * - * Free the IRQ if @dev->irq is non-zero, iounmap @dev->mmio if it is - * non-%NULL, and call comedi_pci_disable() to release the PCI device's regions - * and disable it. - */ -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 PCI COMEDI device - * @pcidev: PCI device. - * @driver: Registered COMEDI driver. - * @context: Driver specific data, passed to comedi_auto_config(). - * - * Typically called from the pci_driver (*probe) function. Auto-configure - * a COMEDI device, using the &struct device embedded in *@pcidev as the - * hardware device. The @context value gets passed through to @driver's - * "auto_attach" handler. The "auto_attach" handler may call - * comedi_to_pci_dev() on the passed in COMEDI device to recover @pcidev. - * - * Return: The result of calling comedi_auto_config() (0 on success, or - * a negative error number on failure). - */ -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 PCI COMEDI device - * @pcidev: PCI device. - * - * Typically called from the pci_driver (*remove) function. Auto-unconfigure - * a COMEDI device attached to this PCI device, using a pointer to the - * &struct device embedded in *@pcidev as the hardware device. The COMEDI - * driver's "detach" handler will be called during unconfiguration of the - * COMEDI device. - * - * Note that the COMEDI device may have already been unconfigured using the - * %COMEDI_DEVCONFIG ioctl, in which case this attempt to unconfigure it - * again should be ignored. - */ -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 PCI COMEDI driver - * @comedi_driver: COMEDI driver to be registered. - * @pci_driver: PCI driver to be registered. - * - * This function is called from the module_init() of PCI COMEDI driver modules - * to register the COMEDI driver and the PCI driver. Do not call it directly, - * use the module_comedi_pci_driver() helper macro instead. - * - * Return: 0 on success, or a negative error number on failure. - */ -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 PCI COMEDI driver - * @comedi_driver: COMEDI driver to be unregistered. - * @pci_driver: PCI driver to be unregistered. - * - * This function is called from the module_exit() of PCI COMEDI driver modules - * to unregister the PCI driver and the COMEDI driver. 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("https://www.comedi.org"); -MODULE_DESCRIPTION("Comedi PCI interface module"); -MODULE_LICENSE("GPL"); |