Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 221 insertions, 0 deletions

diff --git a/kernel/drivers/net/wireless/rt2x00/rt2x00pci.c b/kernel/drivers/net/wireless/rt2x00/rt2x00pci.c
new file mode 100644
index 000000000..d93db4b03
--- /dev/null
+++ b/kernel/drivers/net/wireless/rt2x00/rt2x00pci.c
@@ -0,0 +1,221 @@
+/*
+	Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
+	<http://rt2x00.serialmonkey.com>
+
+	This program is free software; you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation; either version 2 of the License, or
+	(at your option) any later version.
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+/*
+	Module: rt2x00pci
+	Abstract: rt2x00 generic pci device routines.
+ */
+
+#include <linux/dma-mapping.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/slab.h>
+
+#include "rt2x00.h"
+#include "rt2x00pci.h"
+
+/*
+ * PCI driver handlers.
+ */
+static void rt2x00pci_free_reg(struct rt2x00_dev *rt2x00dev)
+{
+	kfree(rt2x00dev->rf);
+	rt2x00dev->rf = NULL;
+
+	kfree(rt2x00dev->eeprom);
+	rt2x00dev->eeprom = NULL;
+
+	if (rt2x00dev->csr.base) {
+		iounmap(rt2x00dev->csr.base);
+		rt2x00dev->csr.base = NULL;
+	}
+}
+
+static int rt2x00pci_alloc_reg(struct rt2x00_dev *rt2x00dev)
+{
+	struct pci_dev *pci_dev = to_pci_dev(rt2x00dev->dev);
+
+	rt2x00dev->csr.base = pci_ioremap_bar(pci_dev, 0);
+	if (!rt2x00dev->csr.base)
+		goto exit;
+
+	rt2x00dev->eeprom = kzalloc(rt2x00dev->ops->eeprom_size, GFP_KERNEL);
+	if (!rt2x00dev->eeprom)
+		goto exit;
+
+	rt2x00dev->rf = kzalloc(rt2x00dev->ops->rf_size, GFP_KERNEL);
+	if (!rt2x00dev->rf)
+		goto exit;
+
+	return 0;
+
+exit:
+	rt2x00_probe_err("Failed to allocate registers\n");
+
+	rt2x00pci_free_reg(rt2x00dev);
+
+	return -ENOMEM;
+}
+
+int rt2x00pci_probe(struct pci_dev *pci_dev, const struct rt2x00_ops *ops)
+{
+	struct ieee80211_hw *hw;
+	struct rt2x00_dev *rt2x00dev;
+	int retval;
+	u16 chip;
+
+	retval = pci_enable_device(pci_dev);
+	if (retval) {
+		rt2x00_probe_err("Enable device failed\n");
+		return retval;
+	}
+
+	retval = pci_request_regions(pci_dev, pci_name(pci_dev));
+	if (retval) {
+		rt2x00_probe_err("PCI request regions failed\n");
+		goto exit_disable_device;
+	}
+
+	pci_set_master(pci_dev);
+
+	if (pci_set_mwi(pci_dev))
+		rt2x00_probe_err("MWI not available\n");
+
+	if (dma_set_mask(&pci_dev->dev, DMA_BIT_MASK(32))) {
+		rt2x00_probe_err("PCI DMA not supported\n");
+		retval = -EIO;
+		goto exit_release_regions;
+	}
+
+	hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw);
+	if (!hw) {
+		rt2x00_probe_err("Failed to allocate hardware\n");
+		retval = -ENOMEM;
+		goto exit_release_regions;
+	}
+
+	pci_set_drvdata(pci_dev, hw);
+
+	rt2x00dev = hw->priv;
+	rt2x00dev->dev = &pci_dev->dev;
+	rt2x00dev->ops = ops;
+	rt2x00dev->hw = hw;
+	rt2x00dev->irq = pci_dev->irq;
+	rt2x00dev->name = ops->name;
+
+	if (pci_is_pcie(pci_dev))
+		rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_PCIE);
+	else
+		rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_PCI);
+
+	retval = rt2x00pci_alloc_reg(rt2x00dev);
+	if (retval)
+		goto exit_free_device;
+
+	/*
+	 * Because rt3290 chip use different efuse offset to read efuse data.
+	 * So before read efuse it need to indicate it is the
+	 * rt3290 or not.
+	 */
+	pci_read_config_word(pci_dev, PCI_DEVICE_ID, &chip);
+	rt2x00dev->chip.rt = chip;
+
+	retval = rt2x00lib_probe_dev(rt2x00dev);
+	if (retval)
+		goto exit_free_reg;
+
+	return 0;
+
+exit_free_reg:
+	rt2x00pci_free_reg(rt2x00dev);
+
+exit_free_device:
+	ieee80211_free_hw(hw);
+
+exit_release_regions:
+	pci_release_regions(pci_dev);
+
+exit_disable_device:
+	pci_disable_device(pci_dev);
+
+	return retval;
+}
+EXPORT_SYMBOL_GPL(rt2x00pci_probe);
+
+void rt2x00pci_remove(struct pci_dev *pci_dev)
+{
+	struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
+	struct rt2x00_dev *rt2x00dev = hw->priv;
+
+	/*
+	 * Free all allocated data.
+	 */
+	rt2x00lib_remove_dev(rt2x00dev);
+	rt2x00pci_free_reg(rt2x00dev);
+	ieee80211_free_hw(hw);
+
+	/*
+	 * Free the PCI device data.
+	 */
+	pci_disable_device(pci_dev);
+	pci_release_regions(pci_dev);
+}
+EXPORT_SYMBOL_GPL(rt2x00pci_remove);
+
+#ifdef CONFIG_PM
+int rt2x00pci_suspend(struct pci_dev *pci_dev, pm_message_t state)
+{
+	struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
+	struct rt2x00_dev *rt2x00dev = hw->priv;
+	int retval;
+
+	retval = rt2x00lib_suspend(rt2x00dev, state);
+	if (retval)
+		return retval;
+
+	pci_save_state(pci_dev);
+	pci_disable_device(pci_dev);
+	return pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state));
+}
+EXPORT_SYMBOL_GPL(rt2x00pci_suspend);
+
+int rt2x00pci_resume(struct pci_dev *pci_dev)
+{
+	struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
+	struct rt2x00_dev *rt2x00dev = hw->priv;
+
+	if (pci_set_power_state(pci_dev, PCI_D0) ||
+	    pci_enable_device(pci_dev)) {
+		rt2x00_err(rt2x00dev, "Failed to resume device\n");
+		return -EIO;
+	}
+
+	pci_restore_state(pci_dev);
+	return rt2x00lib_resume(rt2x00dev);
+}
+EXPORT_SYMBOL_GPL(rt2x00pci_resume);
+#endif /* CONFIG_PM */
+
+/*
+ * rt2x00pci module information.
+ */
+MODULE_AUTHOR(DRV_PROJECT);
+MODULE_VERSION(DRV_VERSION);
+MODULE_DESCRIPTION("rt2x00 pci library");
+MODULE_LICENSE("GPL");