drivers/pci/pcie/portdrv_pci.c

   1 /*
   2  * File:        portdrv_pci.c
   3  * Purpose:     PCI Express Port Bus Driver
   4  *
   5  * Copyright (C) 2004 Intel
   6  * Copyright (C) Tom Long Nguyen (tom.l.nguyen@intel.com)
   7  */
   8
   9 #include <linux/module.h>
  10 #include <linux/pci.h>
  11 #include <linux/kernel.h>
  12 #include <linux/errno.h>
  13 #include <linux/pm.h>
  14 #include <linux/init.h>
  15 #include <linux/pcieport_if.h>
  16
  17 #include "portdrv.h"
  18
  19 /*
  20  * Version Information
  21  */
  22 #define DRIVER_VERSION "v1.0"
  23 #define DRIVER_AUTHOR "tom.l.nguyen@intel.com"
  24 #define DRIVER_DESC "PCIE Port Bus Driver"
  25 MODULE_AUTHOR(DRIVER_AUTHOR);
  26 MODULE_DESCRIPTION(DRIVER_DESC);
  27 MODULE_LICENSE("GPL");
  28
  29 /* global data */
  30 static const char device_name[] = "pcieport-driver";
  31
  32 /*
  33  * pcie_portdrv_probe - Probe PCI-Express port devices
  34  * @dev: PCI-Express port device being probed
  35  *
  36  * If detected invokes the pcie_port_device_register() method for
  37  * this port device.
  38  *
  39  */
  40 static int __devinit pcie_portdrv_probe (struct pci_dev *dev,
  41                                 const struct pci_device_id *id )
  42 {
  43         int                     status;
  44
  45         status = pcie_port_device_probe(dev);
  46         if (status)
  47                 return status;
  48
  49         if (pci_enable_device(dev) < 0)
  50                 return -ENODEV;
  51
  52         pci_set_master(dev);
  53         if (!dev->irq) {
  54                 printk(KERN_WARNING
  55                 "%s->Dev[%04x:%04x] has invalid IRQ. Check vendor BIOS\n",
  56                 __FUNCTION__, dev->device, dev->vendor);
  57         }
  58         if (pcie_port_device_register(dev))
  59                 return -ENOMEM;
  60
  61         return 0;
  62 }
  63
  64 static void pcie_portdrv_remove (struct pci_dev *dev)
  65 {
  66         pcie_port_device_remove(dev);
  67 }
  68
  69 #ifdef CONFIG_PM
  70 static int pcie_portdrv_suspend (struct pci_dev *dev, u32 state)
  71 {
  72         return pcie_port_device_suspend(dev, state);
  73 }
  74
  75 static int pcie_portdrv_resume (struct pci_dev *dev)
  76 {
  77         return pcie_port_device_resume(dev);
  78 }
  79 #endif
  80
  81 /*
  82  * LINUX Device Driver Model
  83  */
  84 static const struct pci_device_id port_pci_ids[] = { {
  85         /* handle any PCI-Express port */
  86         PCI_DEVICE_CLASS(((PCI_CLASS_BRIDGE_PCI << 8) | 0x00), ~0),
  87         }, { /* end: all zeroes */ }
  88 };
  89 MODULE_DEVICE_TABLE(pci, port_pci_ids);
  90
  91 static struct pci_driver pcie_portdrv = {
  92         .name           = (char *)device_name,
  93         .id_table       = &port_pci_ids[0],
  94
  95         .probe          = pcie_portdrv_probe,
  96         .remove         = pcie_portdrv_remove,
  97
  98 #ifdef  CONFIG_PM
  99         .suspend        = pcie_portdrv_suspend,
 100         .resume         = pcie_portdrv_resume,
 101 #endif  /* PM */
 102 };
 103
 104 static int __init pcie_portdrv_init(void)
 105 {
 106         int retval = 0;
 107
 108         pcie_port_bus_register();
 109         retval = pci_register_driver(&pcie_portdrv);
 110         if (retval)
 111                 pcie_port_bus_unregister();
 112         return retval;
 113 }
 114
 115 static void __exit pcie_portdrv_exit(void)
 116 {
 117         pci_unregister_driver(&pcie_portdrv);
 118         pcie_port_bus_unregister();
 119 }
 120
 121 module_init(pcie_portdrv_init);
 122 module_exit(pcie_portdrv_exit);