Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / ssb / pcihost_wrapper.c

diff --git a/kernel/drivers/ssb/pcihost_wrapper.c b/kernel/drivers/ssb/pcihost_wrapper.c
new file mode 100644 (file)
index 0000000..410215c
--- /dev/null
+++ b/kernel/drivers/ssb/pcihost_wrapper.c
@@ -0,0 +1,134 @@
+/*
+ * Sonics Silicon Backplane
+ * PCI Hostdevice wrapper
+ *
+ * Copyright (c) 2005 Martin Langer <martin-langer@gmx.de>
+ * Copyright (c) 2005 Stefano Brivio <st3@riseup.net>
+ * Copyright (c) 2005 Danny van Dyk <kugelfang@gentoo.org>
+ * Copyright (c) 2005 Andreas Jaggi <andreas.jaggi@waterwave.ch>
+ * Copyright (c) 2005-2007 Michael Buesch <m@bues.ch>
+ *
+ * Licensed under the GNU/GPL. See COPYING for details.
+ */
+
+#include <linux/pm.h>
+#include <linux/pci.h>
+#include <linux/export.h>
+#include <linux/slab.h>
+#include <linux/ssb/ssb.h>
+
+
+#ifdef CONFIG_PM_SLEEP
+static int ssb_pcihost_suspend(struct device *d)
+{
+       struct pci_dev *dev = to_pci_dev(d);
+       struct ssb_bus *ssb = pci_get_drvdata(dev);
+       int err;
+
+       err = ssb_bus_suspend(ssb);
+       if (err)
+               return err;
+       pci_save_state(dev);
+       pci_disable_device(dev);
+
+       /* if there is a wakeup enabled child device on ssb bus,
+          enable pci wakeup posibility. */
+       device_set_wakeup_enable(d, d->power.wakeup_path);
+
+       pci_prepare_to_sleep(dev);
+
+       return 0;
+}
+
+static int ssb_pcihost_resume(struct device *d)
+{
+       struct pci_dev *dev = to_pci_dev(d);
+       struct ssb_bus *ssb = pci_get_drvdata(dev);
+       int err;
+
+       pci_back_from_sleep(dev);
+       err = pci_enable_device(dev);
+       if (err)
+               return err;
+       pci_restore_state(dev);
+       err = ssb_bus_resume(ssb);
+       if (err)
+               return err;
+
+       return 0;
+}
+
+static const struct dev_pm_ops ssb_pcihost_pm_ops = {
+       SET_SYSTEM_SLEEP_PM_OPS(ssb_pcihost_suspend, ssb_pcihost_resume)
+};
+
+#endif /* CONFIG_PM_SLEEP */
+
+static int ssb_pcihost_probe(struct pci_dev *dev,
+                            const struct pci_device_id *id)
+{
+       struct ssb_bus *ssb;
+       int err = -ENOMEM;
+       const char *name;
+       u32 val;
+
+       ssb = kzalloc(sizeof(*ssb), GFP_KERNEL);
+       if (!ssb)
+               goto out;
+       err = pci_enable_device(dev);
+       if (err)
+               goto err_kfree_ssb;
+       name = dev_name(&dev->dev);
+       if (dev->driver && dev->driver->name)
+               name = dev->driver->name;
+       err = pci_request_regions(dev, name);
+       if (err)
+               goto err_pci_disable;
+       pci_set_master(dev);
+
+       /* Disable the RETRY_TIMEOUT register (0x41) to keep
+        * PCI Tx retries from interfering with C3 CPU state */
+       pci_read_config_dword(dev, 0x40, &val);
+       if ((val & 0x0000ff00) != 0)
+               pci_write_config_dword(dev, 0x40, val & 0xffff00ff);
+
+       err = ssb_bus_pcibus_register(ssb, dev);
+       if (err)
+               goto err_pci_release_regions;
+
+       pci_set_drvdata(dev, ssb);
+
+out:
+       return err;
+
+err_pci_release_regions:
+       pci_release_regions(dev);
+err_pci_disable:
+       pci_disable_device(dev);
+err_kfree_ssb:
+       kfree(ssb);
+       return err;
+}
+
+static void ssb_pcihost_remove(struct pci_dev *dev)
+{
+       struct ssb_bus *ssb = pci_get_drvdata(dev);
+
+       ssb_bus_unregister(ssb);
+       pci_release_regions(dev);
+       pci_disable_device(dev);
+       kfree(ssb);
+       pci_set_drvdata(dev, NULL);
+}
+
+int ssb_pcihost_register(struct pci_driver *driver)
+{
+       driver->probe = ssb_pcihost_probe;
+       driver->remove = ssb_pcihost_remove;
+#ifdef CONFIG_PM_SLEEP
+       driver->driver.pm = &ssb_pcihost_pm_ops;
+#endif
+
+       return pci_register_driver(driver);
+}
+EXPORT_SYMBOL(ssb_pcihost_register);