/*
   *
   *  Bluetooth driver for the Anycom BlueCard (LSE039/LSE041)
   *
   *  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/sched.h>
  #include <linux/delay.h>
  #include <linux/timer.h>
  #include <linux/errno.h>
  #include <linux/ptrace.h>
  #include <linux/ioport.h>
  #include <linux/spinlock.h>
  #include <linux/moduleparam.h>
  #include <linux/wait.h>
  
  #include <linux/skbuff.h>

  #include <linux/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 the Anycom BlueCard (LSE039/LSE041)");
  MODULE_LICENSE("GPL");
  
  
  
  /* ======================== Local structures ======================== */
  
  
  typedef struct bluecard_info_t {

  	struct pcmcia_device *p_dev;

  
  	struct hci_dev *hdev;
  
  	spinlock_t lock;		/* For serializing operations */
  	struct timer_list timer;	/* For LED control */
  
  	struct sk_buff_head txq;
  	unsigned long tx_state;
  
  	unsigned long rx_state;
  	unsigned long rx_count;
  	struct sk_buff *rx_skb;
  
  	unsigned char ctrl_reg;
  	unsigned long hw_state;		/* Status of the hardware and LED control */
  } bluecard_info_t;

  static int bluecard_config(struct pcmcia_device *link);

  static void bluecard_release(struct pcmcia_device *link);

  static void bluecard_detach(struct pcmcia_device *p_dev);

  
  /* Default baud rate: 57600, 115200, 230400 or 460800 */
  #define DEFAULT_BAUD_RATE  230400
  
  
  /* Hardware states */
  #define CARD_READY             1
  #define CARD_HAS_PCCARD_ID     4
  #define CARD_HAS_POWER_LED     5
  #define CARD_HAS_ACTIVITY_LED  6
  
  /* Transmit states  */
  #define XMIT_SENDING         1
  #define XMIT_WAKEUP          2
  #define XMIT_BUFFER_NUMBER   5	/* unset = buffer one, set = buffer two */
  #define XMIT_BUF_ONE_READY   6
  #define XMIT_BUF_TWO_READY   7
  #define XMIT_SENDING_READY   8
  
  /* Receiver states */
  #define RECV_WAIT_PACKET_TYPE   0
  #define RECV_WAIT_EVENT_HEADER  1
  #define RECV_WAIT_ACL_HEADER    2
  #define RECV_WAIT_SCO_HEADER    3
  #define RECV_WAIT_DATA          4
  
  /* Special packet types */
  #define PKT_BAUD_RATE_57600   0x80
  #define PKT_BAUD_RATE_115200  0x81
  #define PKT_BAUD_RATE_230400  0x82
  #define PKT_BAUD_RATE_460800  0x83
  
  
  /* These are the register offsets */
  #define REG_COMMAND     0x20
  #define REG_INTERRUPT   0x21
  #define REG_CONTROL     0x22
  #define REG_RX_CONTROL  0x24
  #define REG_CARD_RESET  0x30
  #define REG_LED_CTRL    0x30
  
  /* REG_COMMAND */
  #define REG_COMMAND_TX_BUF_ONE  0x01
  #define REG_COMMAND_TX_BUF_TWO  0x02
  #define REG_COMMAND_RX_BUF_ONE  0x04
  #define REG_COMMAND_RX_BUF_TWO  0x08
  #define REG_COMMAND_RX_WIN_ONE  0x00
  #define REG_COMMAND_RX_WIN_TWO  0x10
  
  /* REG_CONTROL */
  #define REG_CONTROL_BAUD_RATE_57600   0x00
  #define REG_CONTROL_BAUD_RATE_115200  0x01
  #define REG_CONTROL_BAUD_RATE_230400  0x02
  #define REG_CONTROL_BAUD_RATE_460800  0x03
  #define REG_CONTROL_RTS               0x04
  #define REG_CONTROL_BT_ON             0x08
  #define REG_CONTROL_BT_RESET          0x10
  #define REG_CONTROL_BT_RES_PU         0x20
  #define REG_CONTROL_INTERRUPT         0x40
  #define REG_CONTROL_CARD_RESET        0x80
  
  /* REG_RX_CONTROL */
  #define RTS_LEVEL_SHIFT_BITS  0x02
  
  
  
  /* ======================== LED handling routines ======================== */
  
  
  static void bluecard_activity_led_timeout(u_long arg)
  {
  	bluecard_info_t *info = (bluecard_info_t *)arg;

  	unsigned int iobase = info->p_dev->resource[0]->start;

  
  	if (!test_bit(CARD_HAS_PCCARD_ID, &(info->hw_state)))
  		return;
  
  	if (test_bit(CARD_HAS_ACTIVITY_LED, &(info->hw_state))) {
  		/* Disable activity LED */
  		outb(0x08 | 0x20, iobase + 0x30);
  	} else {
  		/* Disable power LED */
  		outb(0x00, iobase + 0x30);
  	}
  }
  
  
  static void bluecard_enable_activity_led(bluecard_info_t *info)
  {

  	unsigned int iobase = info->p_dev->resource[0]->start;

  
  	if (!test_bit(CARD_HAS_PCCARD_ID, &(info->hw_state)))
  		return;
  
  	if (test_bit(CARD_HAS_ACTIVITY_LED, &(info->hw_state))) {
  		/* Enable activity LED */
  		outb(0x10 | 0x40, iobase + 0x30);
  
  		/* Stop the LED after HZ/4 */
  		mod_timer(&(info->timer), jiffies + HZ / 4);
  	} else {
  		/* Enable power LED */
  		outb(0x08 | 0x20, iobase + 0x30);
  
  		/* Stop the LED after HZ/2 */
  		mod_timer(&(info->timer), jiffies + HZ / 2);
  	}
  }
  
  
  
  /* ======================== Interrupt handling ======================== */
  
  
  static int bluecard_write(unsigned int iobase, unsigned int offset, __u8 *buf, int len)
  {
  	int i, actual;
  
  	actual = (len > 15) ? 15 : len;
  
  	outb_p(actual, iobase + offset);
  
  	for (i = 0; i < actual; i++)
  		outb_p(buf[i], iobase + offset + i + 1);
  
  	return actual;
  }
  
  
  static void bluecard_write_wakeup(bluecard_info_t *info)
  {
  	if (!info) {
  		BT_ERR("Unknown device");
  		return;
  	}
  
  	if (!test_bit(XMIT_SENDING_READY, &(info->tx_state)))
  		return;
  
  	if (test_and_set_bit(XMIT_SENDING, &(info->tx_state))) {
  		set_bit(XMIT_WAKEUP, &(info->tx_state));
  		return;
  	}
  
  	do {

  		register unsigned int iobase = info->p_dev->resource[0]->start;

  		register unsigned int offset;
  		register unsigned char command;
  		register unsigned long ready_bit;
  		register struct sk_buff *skb;
  		register int len;
  
  		clear_bit(XMIT_WAKEUP, &(info->tx_state));

  		if (!pcmcia_dev_present(info->p_dev))

  			return;
  
  		if (test_bit(XMIT_BUFFER_NUMBER, &(info->tx_state))) {
  			if (!test_bit(XMIT_BUF_TWO_READY, &(info->tx_state)))
  				break;
  			offset = 0x10;
  			command = REG_COMMAND_TX_BUF_TWO;
  			ready_bit = XMIT_BUF_TWO_READY;
  		} else {
  			if (!test_bit(XMIT_BUF_ONE_READY, &(info->tx_state)))
  				break;
  			offset = 0x00;
  			command = REG_COMMAND_TX_BUF_ONE;
  			ready_bit = XMIT_BUF_ONE_READY;
  		}
  
  		if (!(skb = skb_dequeue(&(info->txq))))
  			break;

  		if (bt_cb(skb)->pkt_type & 0x80) {

  			/* Disable RTS */
  			info->ctrl_reg |= REG_CONTROL_RTS;
  			outb(info->ctrl_reg, iobase + REG_CONTROL);
  		}
  
  		/* Activate LED */
  		bluecard_enable_activity_led(info);
  
  		/* Send frame */
  		len = bluecard_write(iobase, offset, skb->data, skb->len);
  
  		/* Tell the FPGA to send the data */
  		outb_p(command, iobase + REG_COMMAND);
  
  		/* Mark the buffer as dirty */
  		clear_bit(ready_bit, &(info->tx_state));

  		if (bt_cb(skb)->pkt_type & 0x80) {

  			DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);

  			DEFINE_WAIT(wait);
  
  			unsigned char baud_reg;

  			switch (bt_cb(skb)->pkt_type) {

  			case PKT_BAUD_RATE_460800:
  				baud_reg = REG_CONTROL_BAUD_RATE_460800;
  				break;
  			case PKT_BAUD_RATE_230400:
  				baud_reg = REG_CONTROL_BAUD_RATE_230400;
  				break;
  			case PKT_BAUD_RATE_115200:
  				baud_reg = REG_CONTROL_BAUD_RATE_115200;
  				break;
  			case PKT_BAUD_RATE_57600:
  				/* Fall through... */
  			default:
  				baud_reg = REG_CONTROL_BAUD_RATE_57600;
  				break;
  			}
  
  			/* Wait until the command reaches the baseband */
  			prepare_to_wait(&wq, &wait, TASK_INTERRUPTIBLE);
  			schedule_timeout(HZ/10);
  			finish_wait(&wq, &wait);
  
  			/* Set baud on baseband */
  			info->ctrl_reg &= ~0x03;
  			info->ctrl_reg |= baud_reg;
  			outb(info->ctrl_reg, iobase + REG_CONTROL);
  
  			/* Enable RTS */
  			info->ctrl_reg &= ~REG_CONTROL_RTS;
  			outb(info->ctrl_reg, iobase + REG_CONTROL);
  
  			/* Wait before the next HCI packet can be send */
  			prepare_to_wait(&wq, &wait, TASK_INTERRUPTIBLE);
  			schedule_timeout(HZ);
  			finish_wait(&wq, &wait);
  		}
  
  		if (len == skb->len) {
  			kfree_skb(skb);
  		} else {
  			skb_pull(skb, len);
  			skb_queue_head(&(info->txq), skb);
  		}
  
  		info->hdev->stat.byte_tx += len;
  
  		/* Change buffer */
  		change_bit(XMIT_BUFFER_NUMBER, &(info->tx_state));
  
  	} while (test_bit(XMIT_WAKEUP, &(info->tx_state)));
  
  	clear_bit(XMIT_SENDING, &(info->tx_state));
  }
  
  
  static int bluecard_read(unsigned int iobase, unsigned int offset, __u8 *buf, int size)
  {
  	int i, n, len;
  
  	outb(REG_COMMAND_RX_WIN_ONE, iobase + REG_COMMAND);
  
  	len = inb(iobase + offset);
  	n = 0;
  	i = 1;
  
  	while (n < len) {
  
  		if (i == 16) {
  			outb(REG_COMMAND_RX_WIN_TWO, iobase + REG_COMMAND);
  			i = 0;
  		}
  
  		buf[n] = inb(iobase + offset + i);
  
  		n++;
  		i++;
  
  	}
  
  	return len;
  }
  
  
  static void bluecard_receive(bluecard_info_t *info, unsigned int offset)
  {
  	unsigned int iobase;
  	unsigned char buf[31];
  	int i, len;
  
  	if (!info) {
  		BT_ERR("Unknown device");
  		return;
  	}

  	iobase = info->p_dev->resource[0]->start;

  
  	if (test_bit(XMIT_SENDING_READY, &(info->tx_state)))
  		bluecard_enable_activity_led(info);
  
  	len = bluecard_read(iobase, offset, buf, sizeof(buf));
  
  	for (i = 0; i < len; i++) {
  
  		/* Allocate packet */
  		if (info->rx_skb == NULL) {
  			info->rx_state = RECV_WAIT_PACKET_TYPE;
  			info->rx_count = 0;
  			if (!(info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) {
  				BT_ERR("Can't allocate mem for new packet");
  				return;
  			}
  		}
  
  		if (info->rx_state == RECV_WAIT_PACKET_TYPE) {
  
  			info->rx_skb->dev = (void *) info->hdev;

  			bt_cb(info->rx_skb)->pkt_type = buf[i];

  			switch (bt_cb(info->rx_skb)->pkt_type) {

  
  			case 0x00:
  				/* init packet */
  				if (offset != 0x00) {
  					set_bit(XMIT_BUF_ONE_READY, &(info->tx_state));
  					set_bit(XMIT_BUF_TWO_READY, &(info->tx_state));
  					set_bit(XMIT_SENDING_READY, &(info->tx_state));
  					bluecard_write_wakeup(info);
  				}
  
  				kfree_skb(info->rx_skb);
  				info->rx_skb = NULL;
  				break;
  
  			case HCI_EVENT_PKT:
  				info->rx_state = RECV_WAIT_EVENT_HEADER;
  				info->rx_count = HCI_EVENT_HDR_SIZE;
  				break;
  
  			case HCI_ACLDATA_PKT:
  				info->rx_state = RECV_WAIT_ACL_HEADER;
  				info->rx_count = HCI_ACL_HDR_SIZE;
  				break;
  
  			case HCI_SCODATA_PKT:
  				info->rx_state = RECV_WAIT_SCO_HEADER;
  				info->rx_count = HCI_SCO_HDR_SIZE;
  				break;
  
  			default:
  				/* unknown packet */

  				BT_ERR("Unknown HCI packet with type 0x%02x received", bt_cb(info->rx_skb)->pkt_type);

  				info->hdev->stat.err_rx++;
  
  				kfree_skb(info->rx_skb);
  				info->rx_skb = NULL;
  				break;
  
  			}
  
  		} else {
  
  			*skb_put(info->rx_skb, 1) = buf[i];
  			info->rx_count--;
  
  			if (info->rx_count == 0) {
  
  				int dlen;
  				struct hci_event_hdr *eh;
  				struct hci_acl_hdr *ah;
  				struct hci_sco_hdr *sh;
  
  				switch (info->rx_state) {
  
  				case RECV_WAIT_EVENT_HEADER:

  					eh = hci_event_hdr(info->rx_skb);

  					info->rx_state = RECV_WAIT_DATA;
  					info->rx_count = eh->plen;
  					break;
  
  				case RECV_WAIT_ACL_HEADER:

  					ah = hci_acl_hdr(info->rx_skb);

  					dlen = __le16_to_cpu(ah->dlen);
  					info->rx_state = RECV_WAIT_DATA;
  					info->rx_count = dlen;
  					break;
  
  				case RECV_WAIT_SCO_HEADER:

  					sh = hci_sco_hdr(info->rx_skb);

  					info->rx_state = RECV_WAIT_DATA;
  					info->rx_count = sh->dlen;
  					break;
  
  				case RECV_WAIT_DATA:
  					hci_recv_frame(info->rx_skb);
  					info->rx_skb = NULL;
  					break;
  
  				}
  
  			}
  
  		}
  
  
  	}
  
  	info->hdev->stat.byte_rx += len;
  }

  static irqreturn_t bluecard_interrupt(int irq, void *dev_inst)

  {
  	bluecard_info_t *info = dev_inst;
  	unsigned int iobase;
  	unsigned char reg;

  	if (!info || !info->hdev)
  		/* our irq handler is shared */
  		return IRQ_NONE;

  
  	if (!test_bit(CARD_READY, &(info->hw_state)))
  		return IRQ_HANDLED;

  	iobase = info->p_dev->resource[0]->start;

  
  	spin_lock(&(info->lock));
  
  	/* Disable interrupt */
  	info->ctrl_reg &= ~REG_CONTROL_INTERRUPT;
  	outb(info->ctrl_reg, iobase + REG_CONTROL);
  
  	reg = inb(iobase + REG_INTERRUPT);
  
  	if ((reg != 0x00) && (reg != 0xff)) {
  
  		if (reg & 0x04) {
  			bluecard_receive(info, 0x00);
  			outb(0x04, iobase + REG_INTERRUPT);
  			outb(REG_COMMAND_RX_BUF_ONE, iobase + REG_COMMAND);
  		}
  
  		if (reg & 0x08) {
  			bluecard_receive(info, 0x10);
  			outb(0x08, iobase + REG_INTERRUPT);
  			outb(REG_COMMAND_RX_BUF_TWO, iobase + REG_COMMAND);
  		}
  
  		if (reg & 0x01) {
  			set_bit(XMIT_BUF_ONE_READY, &(info->tx_state));
  			outb(0x01, iobase + REG_INTERRUPT);
  			bluecard_write_wakeup(info);
  		}
  
  		if (reg & 0x02) {
  			set_bit(XMIT_BUF_TWO_READY, &(info->tx_state));
  			outb(0x02, iobase + REG_INTERRUPT);
  			bluecard_write_wakeup(info);
  		}
  
  	}
  
  	/* Enable interrupt */
  	info->ctrl_reg |= REG_CONTROL_INTERRUPT;
  	outb(info->ctrl_reg, iobase + REG_CONTROL);
  
  	spin_unlock(&(info->lock));
  
  	return IRQ_HANDLED;
  }
  
  
  
  /* ======================== Device specific HCI commands ======================== */
  
  
  static int bluecard_hci_set_baud_rate(struct hci_dev *hdev, int baud)
  {
  	bluecard_info_t *info = (bluecard_info_t *)(hdev->driver_data);
  	struct sk_buff *skb;
  
  	/* Ericsson baud rate command */
  	unsigned char cmd[] = { HCI_COMMAND_PKT, 0x09, 0xfc, 0x01, 0x03 };
  
  	if (!(skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) {
  		BT_ERR("Can't allocate mem for new packet");
  		return -1;
  	}
  
  	switch (baud) {
  	case 460800:
  		cmd[4] = 0x00;

  		bt_cb(skb)->pkt_type = PKT_BAUD_RATE_460800;

  		break;
  	case 230400:
  		cmd[4] = 0x01;

  		bt_cb(skb)->pkt_type = PKT_BAUD_RATE_230400;

  		break;
  	case 115200:
  		cmd[4] = 0x02;

  		bt_cb(skb)->pkt_type = PKT_BAUD_RATE_115200;

  		break;
  	case 57600:
  		/* Fall through... */
  	default:
  		cmd[4] = 0x03;

  		bt_cb(skb)->pkt_type = PKT_BAUD_RATE_57600;

  		break;
  	}
  
  	memcpy(skb_put(skb, sizeof(cmd)), cmd, sizeof(cmd));
  
  	skb_queue_tail(&(info->txq), skb);
  
  	bluecard_write_wakeup(info);
  
  	return 0;
  }
  
  
  
  /* ======================== HCI interface ======================== */
  
  
  static int bluecard_hci_flush(struct hci_dev *hdev)
  {
  	bluecard_info_t *info = (bluecard_info_t *)(hdev->driver_data);
  
  	/* Drop TX queue */
  	skb_queue_purge(&(info->txq));
  
  	return 0;
  }
  
  
  static int bluecard_hci_open(struct hci_dev *hdev)
  {
  	bluecard_info_t *info = (bluecard_info_t *)(hdev->driver_data);

  	unsigned int iobase = info->p_dev->resource[0]->start;

  
  	if (test_bit(CARD_HAS_PCCARD_ID, &(info->hw_state)))
  		bluecard_hci_set_baud_rate(hdev, DEFAULT_BAUD_RATE);
  
  	if (test_and_set_bit(HCI_RUNNING, &(hdev->flags)))
  		return 0;
  
  	if (test_bit(CARD_HAS_PCCARD_ID, &(info->hw_state))) {
  		/* Enable LED */
  		outb(0x08 | 0x20, iobase + 0x30);
  	}
  
  	return 0;
  }
  
  
  static int bluecard_hci_close(struct hci_dev *hdev)
  {
  	bluecard_info_t *info = (bluecard_info_t *)(hdev->driver_data);

  	unsigned int iobase = info->p_dev->resource[0]->start;

  
  	if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags)))
  		return 0;
  
  	bluecard_hci_flush(hdev);
  
  	if (test_bit(CARD_HAS_PCCARD_ID, &(info->hw_state))) {
  		/* Disable LED */
  		outb(0x00, iobase + 0x30);
  	}
  
  	return 0;
  }
  
  
  static int bluecard_hci_send_frame(struct sk_buff *skb)
  {
  	bluecard_info_t *info;
  	struct hci_dev *hdev = (struct hci_dev *)(skb->dev);
  
  	if (!hdev) {
  		BT_ERR("Frame for unknown HCI device (hdev=NULL)");
  		return -ENODEV;
  	}
  
  	info = (bluecard_info_t *)(hdev->driver_data);

  	switch (bt_cb(skb)->pkt_type) {

  	case HCI_COMMAND_PKT:
  		hdev->stat.cmd_tx++;
  		break;
  	case HCI_ACLDATA_PKT:
  		hdev->stat.acl_tx++;
  		break;
  	case HCI_SCODATA_PKT:
  		hdev->stat.sco_tx++;
  		break;
  	};
  
  	/* Prepend skb with frame type */

  	memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);

  	skb_queue_tail(&(info->txq), skb);
  
  	bluecard_write_wakeup(info);
  
  	return 0;
  }
  
  
  static void bluecard_hci_destruct(struct hci_dev *hdev)
  {
  }
  
  
  static int bluecard_hci_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg)
  {
  	return -ENOIOCTLCMD;
  }
  
  
  
  /* ======================== Card services HCI interaction ======================== */
  
  
  static int bluecard_open(bluecard_info_t *info)
  {

  	unsigned int iobase = info->p_dev->resource[0]->start;

  	struct hci_dev *hdev;
  	unsigned char id;
  
  	spin_lock_init(&(info->lock));
  
  	init_timer(&(info->timer));
  	info->timer.function = &bluecard_activity_led_timeout;
  	info->timer.data = (u_long)info;
  
  	skb_queue_head_init(&(info->txq));
  
  	info->rx_state = RECV_WAIT_PACKET_TYPE;
  	info->rx_count = 0;
  	info->rx_skb = NULL;
  
  	/* 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;

  	hdev->driver_data = info;

  	SET_HCIDEV_DEV(hdev, &info->p_dev->dev);

  
  	hdev->open     = bluecard_hci_open;
  	hdev->close    = bluecard_hci_close;
  	hdev->flush    = bluecard_hci_flush;
  	hdev->send     = bluecard_hci_send_frame;
  	hdev->destruct = bluecard_hci_destruct;
  	hdev->ioctl    = bluecard_hci_ioctl;
  
  	hdev->owner = THIS_MODULE;
  
  	id = inb(iobase + 0x30);
  
  	if ((id & 0x0f) == 0x02)
  		set_bit(CARD_HAS_PCCARD_ID, &(info->hw_state));
  
  	if (id & 0x10)
  		set_bit(CARD_HAS_POWER_LED, &(info->hw_state));
  
  	if (id & 0x20)
  		set_bit(CARD_HAS_ACTIVITY_LED, &(info->hw_state));
  
  	/* Reset card */
  	info->ctrl_reg = REG_CONTROL_BT_RESET | REG_CONTROL_CARD_RESET;
  	outb(info->ctrl_reg, iobase + REG_CONTROL);
  
  	/* Turn FPGA off */
  	outb(0x80, iobase + 0x30);
  
  	/* Wait some time */
  	msleep(10);
  
  	/* Turn FPGA on */
  	outb(0x00, iobase + 0x30);
  
  	/* Activate card */
  	info->ctrl_reg = REG_CONTROL_BT_ON | REG_CONTROL_BT_RES_PU;
  	outb(info->ctrl_reg, iobase + REG_CONTROL);
  
  	/* Enable interrupt */
  	outb(0xff, iobase + REG_INTERRUPT);
  	info->ctrl_reg |= REG_CONTROL_INTERRUPT;
  	outb(info->ctrl_reg, iobase + REG_CONTROL);
  
  	if ((id & 0x0f) == 0x03) {
  		/* Disable RTS */
  		info->ctrl_reg |= REG_CONTROL_RTS;
  		outb(info->ctrl_reg, iobase + REG_CONTROL);
  
  		/* Set baud rate */
  		info->ctrl_reg |= 0x03;
  		outb(info->ctrl_reg, iobase + REG_CONTROL);
  
  		/* Enable RTS */
  		info->ctrl_reg &= ~REG_CONTROL_RTS;
  		outb(info->ctrl_reg, iobase + REG_CONTROL);
  
  		set_bit(XMIT_BUF_ONE_READY, &(info->tx_state));
  		set_bit(XMIT_BUF_TWO_READY, &(info->tx_state));
  		set_bit(XMIT_SENDING_READY, &(info->tx_state));
  	}
  
  	/* Start the RX buffers */
  	outb(REG_COMMAND_RX_BUF_ONE, iobase + REG_COMMAND);
  	outb(REG_COMMAND_RX_BUF_TWO, iobase + REG_COMMAND);
  
  	/* Signal that the hardware is ready */
  	set_bit(CARD_READY, &(info->hw_state));
  
  	/* Drop TX queue */
  	skb_queue_purge(&(info->txq));
  
  	/* Control the point at which RTS is enabled */
  	outb((0x0f << RTS_LEVEL_SHIFT_BITS) | 1, iobase + REG_RX_CONTROL);
  
  	/* Timeout before it is safe to send the first HCI packet */
  	msleep(1250);
  
  	/* 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 bluecard_close(bluecard_info_t *info)
  {

  	unsigned int iobase = info->p_dev->resource[0]->start;

  	struct hci_dev *hdev = info->hdev;
  
  	if (!hdev)
  		return -ENODEV;
  
  	bluecard_hci_close(hdev);
  
  	clear_bit(CARD_READY, &(info->hw_state));
  
  	/* Reset card */
  	info->ctrl_reg = REG_CONTROL_BT_RESET | REG_CONTROL_CARD_RESET;
  	outb(info->ctrl_reg, iobase + REG_CONTROL);
  
  	/* Turn FPGA off */
  	outb(0x80, iobase + 0x30);

  	hci_unregister_dev(hdev);

  	hci_free_dev(hdev);
  
  	return 0;
  }

  static int bluecard_probe(struct pcmcia_device *link)

  {
  	bluecard_info_t *info;

  
  	/* Create new info device */

  	info = kzalloc(sizeof(*info), GFP_KERNEL);

  	if (!info)

  		return -ENOMEM;

  	info->p_dev = link;

  	link->priv = info;

  	link->config_flags |= CONF_ENABLE_IRQ;

  	return bluecard_config(link);

  }

  static void bluecard_detach(struct pcmcia_device *link)

  {
  	bluecard_info_t *info = link->priv;

  	bluecard_release(link);

  	kfree(info);
  }

  static int bluecard_config(struct pcmcia_device *link)

  {

  	bluecard_info_t *info = link->priv;

  	int i, n;

  	link->config_index = 0x20;

  
  	link->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
  	link->resource[0]->end = 64;
  	link->io_lines = 6;

  
  	for (n = 0; n < 0x400; n += 0x40) {

  		link->resource[0]->start = n ^ 0x300;
  		i = pcmcia_request_io(link);

  		if (i == 0)

  			break;
  	}

  	if (i != 0)

  		goto failed;

  	i = pcmcia_request_irq(link, bluecard_interrupt);

  	if (i != 0)

  		goto failed;

  	i = pcmcia_enable_device(link);

  	if (i != 0)

  		goto failed;

  
  	if (bluecard_open(info) != 0)
  		goto failed;

  	return 0;

  failed:
  	bluecard_release(link);

  	return -ENODEV;

  }

  static void bluecard_release(struct pcmcia_device *link)

  {
  	bluecard_info_t *info = link->priv;

  	bluecard_close(info);

  
  	del_timer(&(info->timer));

  	pcmcia_disable_device(link);

  }

  static const struct pcmcia_device_id bluecard_ids[] = {

  	PCMCIA_DEVICE_PROD_ID12("BlueCard", "LSE041", 0xbaf16fbf, 0x657cc15e),
  	PCMCIA_DEVICE_PROD_ID12("BTCFCARD", "LSE139", 0xe3987764, 0x2524b59c),
  	PCMCIA_DEVICE_PROD_ID12("WSS", "LSE039", 0x0a0736ec, 0x24e6dfab),
  	PCMCIA_DEVICE_NULL
  };
  MODULE_DEVICE_TABLE(pcmcia, bluecard_ids);

  static struct pcmcia_driver bluecard_driver = {
  	.owner		= THIS_MODULE,

  	.name		= "bluecard_cs",

  	.probe		= bluecard_probe,

  	.remove		= bluecard_detach,

  	.id_table	= bluecard_ids,

  };
  
  static int __init init_bluecard_cs(void)
  {
  	return pcmcia_register_driver(&bluecard_driver);
  }
  
  
  static void __exit exit_bluecard_cs(void)
  {
  	pcmcia_unregister_driver(&bluecard_driver);

  }
  
  module_init(init_bluecard_cs);
  module_exit(exit_bluecard_cs);