131 lines
2.8 KiB
C
131 lines
2.8 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/pm.h>
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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_SLEEP
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static int ssb_pcihost_suspend(struct device *d)
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{
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struct pci_dev *dev = to_pci_dev(d);
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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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/* if there is a wakeup enabled child device on ssb bus,
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enable pci wakeup posibility. */
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device_set_wakeup_enable(d, d->power.wakeup_path);
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pci_prepare_to_sleep(dev);
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return 0;
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}
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static int ssb_pcihost_resume(struct device *d)
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{
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struct pci_dev *dev = to_pci_dev(d);
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struct ssb_bus *ssb = pci_get_drvdata(dev);
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int err;
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pci_back_from_sleep(dev);
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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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static const struct dev_pm_ops ssb_pcihost_pm_ops = {
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SET_SYSTEM_SLEEP_PM_OPS(ssb_pcihost_suspend, ssb_pcihost_resume)
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};
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#endif /* CONFIG_PM_SLEEP */
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static int 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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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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err = pci_request_regions(dev, dev_driver_string(&dev->dev));
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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 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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#ifdef CONFIG_PM_SLEEP
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driver->driver.pm = &ssb_pcihost_pm_ops;
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#endif
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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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