124 lines
2.7 KiB
C
124 lines
2.7 KiB
C
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/*
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* Sonics Silicon Backplane
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* PCI Hostdevice wrapper
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*
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* Copyright (c) 2005 Martin Langer <martin-langer@gmx.de>
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* Copyright (c) 2005 Stefano Brivio <st3@riseup.net>
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* Copyright (c) 2005 Danny van Dyk <kugelfang@gentoo.org>
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* Copyright (c) 2005 Andreas Jaggi <andreas.jaggi@waterwave.ch>
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* Copyright (c) 2005-2007 Michael Buesch <m@bues.ch>
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*
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* Licensed under the GNU/GPL. See COPYING for details.
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*/
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#include <linux/pci.h>
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#include <linux/export.h>
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#include <linux/slab.h>
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#include <linux/ssb/ssb.h>
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#ifdef CONFIG_PM
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static int ssb_pcihost_suspend(struct pci_dev *dev, pm_message_t state)
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{
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struct ssb_bus *ssb = pci_get_drvdata(dev);
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int err;
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err = ssb_bus_suspend(ssb);
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if (err)
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return err;
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pci_save_state(dev);
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pci_disable_device(dev);
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pci_set_power_state(dev, pci_choose_state(dev, state));
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return 0;
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}
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static int ssb_pcihost_resume(struct pci_dev *dev)
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{
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struct ssb_bus *ssb = pci_get_drvdata(dev);
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int err;
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pci_set_power_state(dev, 0);
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err = pci_enable_device(dev);
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if (err)
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return err;
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pci_restore_state(dev);
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err = ssb_bus_resume(ssb);
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if (err)
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return err;
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return 0;
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}
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#else /* CONFIG_PM */
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# define ssb_pcihost_suspend NULL
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# define ssb_pcihost_resume NULL
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#endif /* CONFIG_PM */
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static int __devinit ssb_pcihost_probe(struct pci_dev *dev,
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const struct pci_device_id *id)
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{
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struct ssb_bus *ssb;
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int err = -ENOMEM;
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const char *name;
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u32 val;
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ssb = kzalloc(sizeof(*ssb), GFP_KERNEL);
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if (!ssb)
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goto out;
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err = pci_enable_device(dev);
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if (err)
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goto err_kfree_ssb;
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name = dev_name(&dev->dev);
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if (dev->driver && dev->driver->name)
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name = dev->driver->name;
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err = pci_request_regions(dev, name);
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if (err)
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goto err_pci_disable;
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pci_set_master(dev);
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/* Disable the RETRY_TIMEOUT register (0x41) to keep
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* PCI Tx retries from interfering with C3 CPU state */
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pci_read_config_dword(dev, 0x40, &val);
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if ((val & 0x0000ff00) != 0)
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pci_write_config_dword(dev, 0x40, val & 0xffff00ff);
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err = ssb_bus_pcibus_register(ssb, dev);
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if (err)
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goto err_pci_release_regions;
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pci_set_drvdata(dev, ssb);
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out:
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return err;
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err_pci_release_regions:
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pci_release_regions(dev);
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err_pci_disable:
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pci_disable_device(dev);
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err_kfree_ssb:
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kfree(ssb);
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return err;
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}
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static void ssb_pcihost_remove(struct pci_dev *dev)
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{
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struct ssb_bus *ssb = pci_get_drvdata(dev);
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ssb_bus_unregister(ssb);
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pci_release_regions(dev);
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pci_disable_device(dev);
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kfree(ssb);
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pci_set_drvdata(dev, NULL);
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}
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int __devinit ssb_pcihost_register(struct pci_driver *driver)
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{
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driver->probe = ssb_pcihost_probe;
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driver->remove = ssb_pcihost_remove;
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driver->suspend = ssb_pcihost_suspend;
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driver->resume = ssb_pcihost_resume;
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return pci_register_driver(driver);
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}
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EXPORT_SYMBOL(ssb_pcihost_register);
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