drivers/ssb/pcihost_wrapper.c

   1 /*
   2  * Sonics Silicon Backplane
   3  * PCI Hostdevice wrapper
   4  *
   5  * Copyright (c) 2005 Martin Langer <martin-langer@gmx.de>
   6  * Copyright (c) 2005 Stefano Brivio <st3@riseup.net>
   7  * Copyright (c) 2005 Danny van Dyk <kugelfang@gentoo.org>
   8  * Copyright (c) 2005 Andreas Jaggi <andreas.jaggi@waterwave.ch>
   9  * Copyright (c) 2005-2007 Michael Buesch <mbuesch@freenet.de>
  10  *
  11  * Licensed under the GNU/GPL. See COPYING for details.
  12  */
  13
  14 #include <linux/pci.h>
  15 #include <linux/ssb/ssb.h>
  16
  17
  18 #ifdef CONFIG_PM
  19 static int ssb_pcihost_suspend(struct pci_dev *dev, pm_message_t state)
  20 {
  21         pci_save_state(dev);
  22         pci_disable_device(dev);
  23         pci_set_power_state(dev, pci_choose_state(dev, state));
  24
  25         return 0;
  26 }
  27
  28 static int ssb_pcihost_resume(struct pci_dev *dev)
  29 {
  30         int err;
  31
  32         pci_set_power_state(dev, 0);
  33         err = pci_enable_device(dev);
  34         if (err)
  35                 return err;
  36         pci_restore_state(dev);
  37
  38         return 0;
  39 }
  40 #else /* CONFIG_PM */
  41 # define ssb_pcihost_suspend    NULL
  42 # define ssb_pcihost_resume     NULL
  43 #endif /* CONFIG_PM */
  44
  45 static int ssb_pcihost_probe(struct pci_dev *dev,
  46                              const struct pci_device_id *id)
  47 {
  48         struct ssb_bus *ssb;
  49         int err = -ENOMEM;
  50         const char *name;
  51
  52         ssb = kzalloc(sizeof(*ssb), GFP_KERNEL);
  53         if (!ssb)
  54                 goto out;
  55         err = pci_enable_device(dev);
  56         if (err)
  57                 goto err_kfree_ssb;
  58         name = dev->dev.bus_id;
  59         if (dev->driver && dev->driver->name)
  60                 name = dev->driver->name;
  61         err = pci_request_regions(dev, name);
  62         if (err)
  63                 goto err_pci_disable;
  64         pci_set_master(dev);
  65
  66         err = ssb_bus_pcibus_register(ssb, dev);
  67         if (err)
  68                 goto err_pci_release_regions;
  69
  70         pci_set_drvdata(dev, ssb);
  71
  72 out:
  73         return err;
  74
  75 err_pci_release_regions:
  76         pci_release_regions(dev);
  77 err_pci_disable:
  78         pci_disable_device(dev);
  79 err_kfree_ssb:
  80         kfree(ssb);
  81         return err;
  82 }
  83
  84 static void ssb_pcihost_remove(struct pci_dev *dev)
  85 {
  86         struct ssb_bus *ssb = pci_get_drvdata(dev);
  87
  88         ssb_bus_unregister(ssb);
  89         pci_release_regions(dev);
  90         pci_disable_device(dev);
  91         kfree(ssb);
  92         pci_set_drvdata(dev, NULL);
  93 }
  94
  95 int ssb_pcihost_register(struct pci_driver *driver)
  96 {
  97         driver->probe = ssb_pcihost_probe;
  98         driver->remove = ssb_pcihost_remove;
  99         driver->suspend = ssb_pcihost_suspend;
 100         driver->resume = ssb_pcihost_resume;
 101
 102         return pci_register_driver(driver);
 103 }
 104 EXPORT_SYMBOL(ssb_pcihost_register);