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, 618 insertions, 0 deletions

diff --git a/kernel/drivers/bluetooth/dtl1_cs.c b/kernel/drivers/bluetooth/dtl1_cs.c
new file mode 100644
index 000000000..78e10f0c6
--- /dev/null
+++ b/kernel/drivers/bluetooth/dtl1_cs.c
@@ -0,0 +1,618 @@
+/*
+ *
+ *  A driver for Nokia Connectivity Card DTL-1 devices
+ *
+ *  Copyright (C) 2001-2002  Marcel Holtmann <marcel@holtmann.org>
+ *
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 as
+ *  published by the Free Software Foundation;
+ *
+ *  Software distributed under the License is distributed on an "AS
+ *  IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+ *  implied. See the License for the specific language governing
+ *  rights and limitations under the License.
+ *
+ *  The initial developer of the original code is David A. Hinds
+ *  <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
+ *  are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
+ *
+ */
+
+#include <linux/module.h>
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/ptrace.h>
+#include <linux/ioport.h>
+#include <linux/spinlock.h>
+#include <linux/moduleparam.h>
+
+#include <linux/skbuff.h>
+#include <linux/string.h>
+#include <linux/serial.h>
+#include <linux/serial_reg.h>
+#include <linux/bitops.h>
+#include <asm/io.h>
+
+#include <pcmcia/cistpl.h>
+#include <pcmcia/ciscode.h>
+#include <pcmcia/ds.h>
+#include <pcmcia/cisreg.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+
+
+
+/* ======================== Module parameters ======================== */
+
+
+MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
+MODULE_DESCRIPTION("Bluetooth driver for Nokia Connectivity Card DTL-1");
+MODULE_LICENSE("GPL");
+
+
+
+/* ======================== Local structures ======================== */
+
+
+struct dtl1_info {
+	struct pcmcia_device *p_dev;
+
+	struct hci_dev *hdev;
+
+	spinlock_t lock;		/* For serializing operations */
+
+	unsigned long flowmask;		/* HCI flow mask */
+	int ri_latch;
+
+	struct sk_buff_head txq;
+	unsigned long tx_state;
+
+	unsigned long rx_state;
+	unsigned long rx_count;
+	struct sk_buff *rx_skb;
+};
+
+
+static int dtl1_config(struct pcmcia_device *link);
+
+
+/* Transmit states  */
+#define XMIT_SENDING  1
+#define XMIT_WAKEUP   2
+#define XMIT_WAITING  8
+
+/* Receiver States */
+#define RECV_WAIT_NSH   0
+#define RECV_WAIT_DATA  1
+
+
+struct nsh {
+	u8 type;
+	u8 zero;
+	u16 len;
+} __packed;	/* Nokia Specific Header */
+
+#define NSHL  4				/* Nokia Specific Header Length */
+
+
+
+/* ======================== Interrupt handling ======================== */
+
+
+static int dtl1_write(unsigned int iobase, int fifo_size, __u8 *buf, int len)
+{
+	int actual = 0;
+
+	/* Tx FIFO should be empty */
+	if (!(inb(iobase + UART_LSR) & UART_LSR_THRE))
+		return 0;
+
+	/* Fill FIFO with current frame */
+	while ((fifo_size-- > 0) && (actual < len)) {
+		/* Transmit next byte */
+		outb(buf[actual], iobase + UART_TX);
+		actual++;
+	}
+
+	return actual;
+}
+
+
+static void dtl1_write_wakeup(struct dtl1_info *info)
+{
+	if (!info) {
+		BT_ERR("Unknown device");
+		return;
+	}
+
+	if (test_bit(XMIT_WAITING, &(info->tx_state))) {
+		set_bit(XMIT_WAKEUP, &(info->tx_state));
+		return;
+	}
+
+	if (test_and_set_bit(XMIT_SENDING, &(info->tx_state))) {
+		set_bit(XMIT_WAKEUP, &(info->tx_state));
+		return;
+	}
+
+	do {
+		unsigned int iobase = info->p_dev->resource[0]->start;
+		register struct sk_buff *skb;
+		int len;
+
+		clear_bit(XMIT_WAKEUP, &(info->tx_state));
+
+		if (!pcmcia_dev_present(info->p_dev))
+			return;
+
+		skb = skb_dequeue(&(info->txq));
+		if (!skb)
+			break;
+
+		/* Send frame */
+		len = dtl1_write(iobase, 32, skb->data, skb->len);
+
+		if (len == skb->len) {
+			set_bit(XMIT_WAITING, &(info->tx_state));
+			kfree_skb(skb);
+		} else {
+			skb_pull(skb, len);
+			skb_queue_head(&(info->txq), skb);
+		}
+
+		info->hdev->stat.byte_tx += len;
+
+	} while (test_bit(XMIT_WAKEUP, &(info->tx_state)));
+
+	clear_bit(XMIT_SENDING, &(info->tx_state));
+}
+
+
+static void dtl1_control(struct dtl1_info *info, struct sk_buff *skb)
+{
+	u8 flowmask = *(u8 *)skb->data;
+	int i;
+
+	printk(KERN_INFO "Bluetooth: Nokia control data =");
+	for (i = 0; i < skb->len; i++) {
+		printk(" %02x", skb->data[i]);
+	}
+	printk("\n");
+
+	/* transition to active state */
+	if (((info->flowmask & 0x07) == 0) && ((flowmask & 0x07) != 0)) {
+		clear_bit(XMIT_WAITING, &(info->tx_state));
+		dtl1_write_wakeup(info);
+	}
+
+	info->flowmask = flowmask;
+
+	kfree_skb(skb);
+}
+
+
+static void dtl1_receive(struct dtl1_info *info)
+{
+	unsigned int iobase;
+	struct nsh *nsh;
+	int boguscount = 0;
+
+	if (!info) {
+		BT_ERR("Unknown device");
+		return;
+	}
+
+	iobase = info->p_dev->resource[0]->start;
+
+	do {
+		info->hdev->stat.byte_rx++;
+
+		/* Allocate packet */
+		if (info->rx_skb == NULL) {
+			info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC);
+			if (!info->rx_skb) {
+				BT_ERR("Can't allocate mem for new packet");
+				info->rx_state = RECV_WAIT_NSH;
+				info->rx_count = NSHL;
+				return;
+			}
+		}
+
+		*skb_put(info->rx_skb, 1) = inb(iobase + UART_RX);
+		nsh = (struct nsh *)info->rx_skb->data;
+
+		info->rx_count--;
+
+		if (info->rx_count == 0) {
+
+			switch (info->rx_state) {
+			case RECV_WAIT_NSH:
+				info->rx_state = RECV_WAIT_DATA;
+				info->rx_count = nsh->len + (nsh->len & 0x0001);
+				break;
+			case RECV_WAIT_DATA:
+				bt_cb(info->rx_skb)->pkt_type = nsh->type;
+
+				/* remove PAD byte if it exists */
+				if (nsh->len & 0x0001) {
+					info->rx_skb->tail--;
+					info->rx_skb->len--;
+				}
+
+				/* remove NSH */
+				skb_pull(info->rx_skb, NSHL);
+
+				switch (bt_cb(info->rx_skb)->pkt_type) {
+				case 0x80:
+					/* control data for the Nokia Card */
+					dtl1_control(info, info->rx_skb);
+					break;
+				case 0x82:
+				case 0x83:
+				case 0x84:
+					/* send frame to the HCI layer */
+					bt_cb(info->rx_skb)->pkt_type &= 0x0f;
+					hci_recv_frame(info->hdev, info->rx_skb);
+					break;
+				default:
+					/* unknown packet */
+					BT_ERR("Unknown HCI packet with type 0x%02x received", bt_cb(info->rx_skb)->pkt_type);
+					kfree_skb(info->rx_skb);
+					break;
+				}
+
+				info->rx_state = RECV_WAIT_NSH;
+				info->rx_count = NSHL;
+				info->rx_skb = NULL;
+				break;
+			}
+
+		}
+
+		/* Make sure we don't stay here too long */
+		if (boguscount++ > 32)
+			break;
+
+	} while (inb(iobase + UART_LSR) & UART_LSR_DR);
+}
+
+
+static irqreturn_t dtl1_interrupt(int irq, void *dev_inst)
+{
+	struct dtl1_info *info = dev_inst;
+	unsigned int iobase;
+	unsigned char msr;
+	int boguscount = 0;
+	int iir, lsr;
+	irqreturn_t r = IRQ_NONE;
+
+	if (!info || !info->hdev)
+		/* our irq handler is shared */
+		return IRQ_NONE;
+
+	iobase = info->p_dev->resource[0]->start;
+
+	spin_lock(&(info->lock));
+
+	iir = inb(iobase + UART_IIR) & UART_IIR_ID;
+	while (iir) {
+
+		r = IRQ_HANDLED;
+		/* Clear interrupt */
+		lsr = inb(iobase + UART_LSR);
+
+		switch (iir) {
+		case UART_IIR_RLSI:
+			BT_ERR("RLSI");
+			break;
+		case UART_IIR_RDI:
+			/* Receive interrupt */
+			dtl1_receive(info);
+			break;
+		case UART_IIR_THRI:
+			if (lsr & UART_LSR_THRE) {
+				/* Transmitter ready for data */
+				dtl1_write_wakeup(info);
+			}
+			break;
+		default:
+			BT_ERR("Unhandled IIR=%#x", iir);
+			break;
+		}
+
+		/* Make sure we don't stay here too long */
+		if (boguscount++ > 100)
+			break;
+
+		iir = inb(iobase + UART_IIR) & UART_IIR_ID;
+
+	}
+
+	msr = inb(iobase + UART_MSR);
+
+	if (info->ri_latch ^ (msr & UART_MSR_RI)) {
+		info->ri_latch = msr & UART_MSR_RI;
+		clear_bit(XMIT_WAITING, &(info->tx_state));
+		dtl1_write_wakeup(info);
+		r = IRQ_HANDLED;
+	}
+
+	spin_unlock(&(info->lock));
+
+	return r;
+}
+
+
+
+/* ======================== HCI interface ======================== */
+
+
+static int dtl1_hci_open(struct hci_dev *hdev)
+{
+	set_bit(HCI_RUNNING, &(hdev->flags));
+
+	return 0;
+}
+
+
+static int dtl1_hci_flush(struct hci_dev *hdev)
+{
+	struct dtl1_info *info = hci_get_drvdata(hdev);
+
+	/* Drop TX queue */
+	skb_queue_purge(&(info->txq));
+
+	return 0;
+}
+
+
+static int dtl1_hci_close(struct hci_dev *hdev)
+{
+	if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags)))
+		return 0;
+
+	dtl1_hci_flush(hdev);
+
+	return 0;
+}
+
+
+static int dtl1_hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct dtl1_info *info = hci_get_drvdata(hdev);
+	struct sk_buff *s;
+	struct nsh nsh;
+
+	switch (bt_cb(skb)->pkt_type) {
+	case HCI_COMMAND_PKT:
+		hdev->stat.cmd_tx++;
+		nsh.type = 0x81;
+		break;
+	case HCI_ACLDATA_PKT:
+		hdev->stat.acl_tx++;
+		nsh.type = 0x82;
+		break;
+	case HCI_SCODATA_PKT:
+		hdev->stat.sco_tx++;
+		nsh.type = 0x83;
+		break;
+	default:
+		return -EILSEQ;
+	};
+
+	nsh.zero = 0;
+	nsh.len = skb->len;
+
+	s = bt_skb_alloc(NSHL + skb->len + 1, GFP_ATOMIC);
+	if (!s)
+		return -ENOMEM;
+
+	skb_reserve(s, NSHL);
+	skb_copy_from_linear_data(skb, skb_put(s, skb->len), skb->len);
+	if (skb->len & 0x0001)
+		*skb_put(s, 1) = 0;	/* PAD */
+
+	/* Prepend skb with Nokia frame header and queue */
+	memcpy(skb_push(s, NSHL), &nsh, NSHL);
+	skb_queue_tail(&(info->txq), s);
+
+	dtl1_write_wakeup(info);
+
+	kfree_skb(skb);
+
+	return 0;
+}
+
+
+
+/* ======================== Card services HCI interaction ======================== */
+
+
+static int dtl1_open(struct dtl1_info *info)
+{
+	unsigned long flags;
+	unsigned int iobase = info->p_dev->resource[0]->start;
+	struct hci_dev *hdev;
+
+	spin_lock_init(&(info->lock));
+
+	skb_queue_head_init(&(info->txq));
+
+	info->rx_state = RECV_WAIT_NSH;
+	info->rx_count = NSHL;
+	info->rx_skb = NULL;
+
+	set_bit(XMIT_WAITING, &(info->tx_state));
+
+	/* Initialize HCI device */
+	hdev = hci_alloc_dev();
+	if (!hdev) {
+		BT_ERR("Can't allocate HCI device");
+		return -ENOMEM;
+	}
+
+	info->hdev = hdev;
+
+	hdev->bus = HCI_PCCARD;
+	hci_set_drvdata(hdev, info);
+	SET_HCIDEV_DEV(hdev, &info->p_dev->dev);
+
+	hdev->open  = dtl1_hci_open;
+	hdev->close = dtl1_hci_close;
+	hdev->flush = dtl1_hci_flush;
+	hdev->send  = dtl1_hci_send_frame;
+
+	spin_lock_irqsave(&(info->lock), flags);
+
+	/* Reset UART */
+	outb(0, iobase + UART_MCR);
+
+	/* Turn off interrupts */
+	outb(0, iobase + UART_IER);
+
+	/* Initialize UART */
+	outb(UART_LCR_WLEN8, iobase + UART_LCR);	/* Reset DLAB */
+	outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase + UART_MCR);
+
+	info->ri_latch = inb(info->p_dev->resource[0]->start + UART_MSR)
+				& UART_MSR_RI;
+
+	/* Turn on interrupts */
+	outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER);
+
+	spin_unlock_irqrestore(&(info->lock), flags);
+
+	/* Timeout before it is safe to send the first HCI packet */
+	msleep(2000);
+
+	/* Register HCI device */
+	if (hci_register_dev(hdev) < 0) {
+		BT_ERR("Can't register HCI device");
+		info->hdev = NULL;
+		hci_free_dev(hdev);
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+
+static int dtl1_close(struct dtl1_info *info)
+{
+	unsigned long flags;
+	unsigned int iobase = info->p_dev->resource[0]->start;
+	struct hci_dev *hdev = info->hdev;
+
+	if (!hdev)
+		return -ENODEV;
+
+	dtl1_hci_close(hdev);
+
+	spin_lock_irqsave(&(info->lock), flags);
+
+	/* Reset UART */
+	outb(0, iobase + UART_MCR);
+
+	/* Turn off interrupts */
+	outb(0, iobase + UART_IER);
+
+	spin_unlock_irqrestore(&(info->lock), flags);
+
+	hci_unregister_dev(hdev);
+	hci_free_dev(hdev);
+
+	return 0;
+}
+
+static int dtl1_probe(struct pcmcia_device *link)
+{
+	struct dtl1_info *info;
+
+	/* Create new info device */
+	info = devm_kzalloc(&link->dev, sizeof(*info), GFP_KERNEL);
+	if (!info)
+		return -ENOMEM;
+
+	info->p_dev = link;
+	link->priv = info;
+
+	link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
+
+	return dtl1_config(link);
+}
+
+
+static void dtl1_detach(struct pcmcia_device *link)
+{
+	struct dtl1_info *info = link->priv;
+
+	dtl1_close(info);
+	pcmcia_disable_device(link);
+}
+
+static int dtl1_confcheck(struct pcmcia_device *p_dev, void *priv_data)
+{
+	if ((p_dev->resource[1]->end) || (p_dev->resource[1]->end < 8))
+		return -ENODEV;
+
+	p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
+	p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
+
+	return pcmcia_request_io(p_dev);
+}
+
+static int dtl1_config(struct pcmcia_device *link)
+{
+	struct dtl1_info *info = link->priv;
+	int ret;
+
+	/* Look for a generic full-sized window */
+	link->resource[0]->end = 8;
+	ret = pcmcia_loop_config(link, dtl1_confcheck, NULL);
+	if (ret)
+		goto failed;
+
+	ret = pcmcia_request_irq(link, dtl1_interrupt);
+	if (ret)
+		goto failed;
+
+	ret = pcmcia_enable_device(link);
+	if (ret)
+		goto failed;
+
+	ret = dtl1_open(info);
+	if (ret)
+		goto failed;
+
+	return 0;
+
+failed:
+	dtl1_detach(link);
+	return ret;
+}
+
+static const struct pcmcia_device_id dtl1_ids[] = {
+	PCMCIA_DEVICE_PROD_ID12("Nokia Mobile Phones", "DTL-1", 0xe1bfdd64, 0xe168480d),
+	PCMCIA_DEVICE_PROD_ID12("Nokia Mobile Phones", "DTL-4", 0xe1bfdd64, 0x9102bc82),
+	PCMCIA_DEVICE_PROD_ID12("Socket", "CF", 0xb38bcc2e, 0x44ebf863),
+	PCMCIA_DEVICE_PROD_ID12("Socket", "CF+ Personal Network Card", 0xb38bcc2e, 0xe732bae3),
+	PCMCIA_DEVICE_NULL
+};
+MODULE_DEVICE_TABLE(pcmcia, dtl1_ids);
+
+static struct pcmcia_driver dtl1_driver = {
+	.owner		= THIS_MODULE,
+	.name		= "dtl1_cs",
+	.probe		= dtl1_probe,
+	.remove		= dtl1_detach,
+	.id_table	= dtl1_ids,
+};
+module_pcmcia_driver(dtl1_driver);