LinCAN PCI cards support updated to support PCI devices reference counting.

[lincan.git] / lincan / src / esdpci200.c

diff --git a/lincan/src/esdpci200.c b/lincan/src/esdpci200.c
index 1d10d64cc675cb188e4f7b61df710f3dd6489d9c..292ae9071b6820433ac219de25afd54361ca04b0 100644 (file)
--- a/lincan/src/esdpci200.c
+++ b/lincan/src/esdpci200.c
@@ -1,10 +1,37 @@
-/* esdpci200.c - support for ESD Electronics' CAN/PCI-200 cards
- * Linux CAN-bus device driver.
- * The card support was added by Manuel Bessler <m.bessler@gmx.net>
- * Based on adlink7841.c and nsi_canpci.c
- * This software is released under the GPL-License.
- * Version lincan-0.3.3
- */ 
+/**************************************************************************/
+/* File: esdpci200.c - support for ESD Electronics' CAN/PCI-200 cards     */
+/*                                                                        */
+/* LinCAN - (Not only) Linux CAN bus driver                               */
+/* Copyright (C) 2002-2009 DCE FEE CTU Prague <http://dce.felk.cvut.cz>   */
+/* Copyright (C) 2002-2009 Pavel Pisa <pisa@cmp.felk.cvut.cz>             */
+/* Copyright (C) 2007 Manuel Bessler <m.bessler@gmx.net>                  */
+/* Funded by OCERA and FRESCOR IST projects                               */
+/* Based on CAN driver code by Arnaud Westenberg <arnaud@wanadoo.nl>      */
+/*                                                                        */
+/* LinCAN is free software; you can redistribute it and/or modify it      */
+/* under terms of the GNU General Public License as published by the      */
+/* Free Software Foundation; either version 2, or (at your option) any    */
+/* later version.  LinCAN 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. You should have received a    */
+/* copy of the GNU General Public License along with LinCAN; see file     */
+/* COPYING. If not, write to the Free Software Foundation, 675 Mass Ave,  */
+/* Cambridge, MA 02139, USA.                                              */
+/*                                                                        */
+/* To allow use of LinCAN in the compact embedded systems firmware        */
+/* and RT-executives (RTEMS for example), main authors agree with next    */
+/* special exception:                                                     */
+/*                                                                        */
+/* Including LinCAN header files in a file, instantiating LinCAN generics */
+/* or templates, or linking other files with LinCAN objects to produce    */
+/* an application image/executable, does not by itself cause the          */
+/* resulting application image/executable to be covered by                */
+/* the GNU General Public License.                                        */
+/* This exception does not however invalidate any other reasons           */
+/* why the executable file might be covered by the GNU Public License.    */
+/* Publication of enhanced or derived LinCAN files is required although.  */
+/**************************************************************************/
 
 #include "../include/can.h"
 #include "../include/can_sysdep.h"
@@ -263,15 +290,15 @@ int esdpci200_reset(struct candevice_t *candev)
 
 int esdpci200_init_hw_data(struct candevice_t *candev)
 {
-       struct pci_dev *pcidev = NULL;
+       struct pci_dev *pcidev;
+
+       pcidev = can_pci_get_next_untaken_device(ESDPCI200_PCI_VENDOR_ID, ESDPCI200_PCI_PRODUCT_ID);
+       if(pcidev == NULL)
+               return -ENODEV;
 
-       do {
-               pcidev = pci_find_device(ESDPCI200_PCI_VENDOR_ID, ESDPCI200_PCI_PRODUCT_ID, pcidev);
-               if(pcidev == NULL) return -ENODEV;
-       } while(can_check_dev_taken(pcidev));
-       
        if (pci_enable_device (pcidev)){
                printk(KERN_CRIT "Setup of ESDPCI200 failed\n");
+               can_pci_dev_put(pcidev);
                return -EIO;
        }
        candev->sysdevptr.pcidev=pcidev;
@@ -281,17 +308,20 @@ int esdpci200_init_hw_data(struct candevice_t *candev)
        if(!(pci_resource_flags(pcidev, 0)&IORESOURCE_MEM))
        {
           printk(KERN_CRIT "PCI200 region %d is not MEM\n",0);
+          can_pci_dev_put(pcidev);
           return -EIO;
        }
        if(!(pci_resource_flags(pcidev, 1)&IORESOURCE_IO))
        {
           printk(KERN_CRIT "PCI200 region %d is not IO\n",1);
+          can_pci_dev_put(pcidev);
           return -EIO;
        }
 
        if(!(pci_resource_flags(pcidev,2)&IORESOURCE_MEM))
        {
           printk(KERN_CRIT "PCI200 region %d is not MEM\n",2);
+          can_pci_dev_put(pcidev);
           return -EIO;
        }
 
@@ -312,6 +342,12 @@ int esdpci200_init_hw_data(struct candevice_t *candev)
        return 0;
 }
 
+void esdpci200_done_hw_data(struct candevice_t *candev)
+{
+       struct pci_dev *pcidev = candev->sysdevptr.pcidev;
+       can_pci_dev_put(pcidev);
+}
+
 int esdpci200_init_chip_data(struct candevice_t *candev, int chipnr)
 {
 
@@ -362,6 +398,7 @@ int esdpci200_register(struct hwspecops_t *hwspecops)
        hwspecops->release_io = esdpci200_release_io;
        hwspecops->reset = esdpci200_reset;
        hwspecops->init_hw_data = esdpci200_init_hw_data;
+       hwspecops->done_hw_data = esdpci200_done_hw_data;
        hwspecops->init_chip_data = esdpci200_init_chip_data;
        hwspecops->init_obj_data = esdpci200_init_obj_data;
        hwspecops->write_register = esdpci200_write_register;