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         struct ssb_bus *ssb = pci_get_drvdata(dev);
  22         int err;
  23
  24         err = ssb_bus_suspend(ssb);
  25         if (err)
  26                 return err;
  27         pci_save_state(dev);
  28         pci_disable_device(dev);
  29         pci_set_power_state(dev, pci_choose_state(dev, state));
  30
  31         return 0;
  32 }
  33
  34 static int ssb_pcihost_resume(struct pci_dev *dev)
  35 {
  36         struct ssb_bus *ssb = pci_get_drvdata(dev);
  37         int err;
  38
  39         pci_set_power_state(dev, 0);
  40         err = pci_enable_device(dev);
  41         if (err)
  42                 return err;
  43         pci_restore_state(dev);
  44         err = ssb_bus_resume(ssb);
  45         if (err)
  46                 return err;
  47
  48         return 0;
  49 }
  50 #else /* CONFIG_PM */
  51 # define ssb_pcihost_suspend    NULL
  52 # define ssb_pcihost_resume     NULL
  53 #endif /* CONFIG_PM */
  54
  55 static int ssb_pcihost_probe(struct pci_dev *dev,
  56                              const struct pci_device_id *id)
  57 {
  58         struct ssb_bus *ssb;
  59         int err = -ENOMEM;
  60         const char *name;
  61
  62         ssb = kzalloc(sizeof(*ssb), GFP_KERNEL);
  63         if (!ssb)
  64                 goto out;
  65         err = pci_enable_device(dev);
  66         if (err)
  67                 goto err_kfree_ssb;
  68         name = dev_name(&dev->dev);
  69         if (dev->driver && dev->driver->name)
  70                 name = dev->driver->name;
  71         err = pci_request_regions(dev, name);
  72         if (err)
  73                 goto err_pci_disable;
  74         pci_set_master(dev);
  75
  76         err = ssb_bus_pcibus_register(ssb, dev);
  77         if (err)
  78                 goto err_pci_release_regions;
  79
  80         pci_set_drvdata(dev, ssb);
  81
  82 out:
  83         return err;
  84
  85 err_pci_release_regions:
  86         pci_release_regions(dev);
  87 err_pci_disable:
  88         pci_disable_device(dev);
  89 err_kfree_ssb:
  90         kfree(ssb);
  91         return err;
  92 }
  93
  94 static void ssb_pcihost_remove(struct pci_dev *dev)
  95 {
  96         struct ssb_bus *ssb = pci_get_drvdata(dev);
  97
  98         ssb_bus_unregister(ssb);
  99         pci_release_regions(dev);
 100         pci_disable_device(dev);
 101         kfree(ssb);
 102         pci_set_drvdata(dev, NULL);
 103 }
 104
 105 int ssb_pcihost_register(struct pci_driver *driver)
 106 {
 107         driver->probe = ssb_pcihost_probe;
 108         driver->remove = ssb_pcihost_remove;
 109         driver->suspend = ssb_pcihost_suspend;
 110         driver->resume = ssb_pcihost_resume;
 111
 112         return pci_register_driver(driver);
 113 }
 114 EXPORT_SYMBOL(ssb_pcihost_register);