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bluecard_cs.c

/*
 *
 *  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 <asm/io.h>

#include <pcmcia/cs_types.h>
#include <pcmcia/cs.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;
      dev_node_t node;

      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->io.BasePort1;

      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->io.BasePort1;

      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->io.BasePort1;
            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->io.BasePort1;

      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;

      BUG_ON(!info->hdev);

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

      iobase = info->p_dev->io.BasePort1;

      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->io.BasePort1;

      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->io.BasePort1;

      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->io.BasePort1;
      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->type = 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->io.BasePort1;
      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);

      if (hci_unregister_dev(hdev) < 0)
            BT_ERR("Can't unregister HCI device %s", hdev->name);

      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->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
      link->io.NumPorts1 = 8;
      link->irq.Attributes = IRQ_TYPE_EXCLUSIVE | IRQ_HANDLE_PRESENT;
      link->irq.IRQInfo1 = IRQ_LEVEL_ID;

      link->irq.Handler = bluecard_interrupt;
      link->irq.Instance = info;

      link->conf.Attributes = CONF_ENABLE_IRQ;
      link->conf.IntType = INT_MEMORY_AND_IO;

      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->conf.ConfigIndex = 0x20;
      link->io.NumPorts1 = 64;
      link->io.IOAddrLines = 6;

      for (n = 0; n < 0x400; n += 0x40) {
            link->io.BasePort1 = n ^ 0x300;
            i = pcmcia_request_io(link, &link->io);
            if (i == CS_SUCCESS)
                  break;
      }

      if (i != CS_SUCCESS) {
            cs_error(link, RequestIO, i);
            goto failed;
      }

      i = pcmcia_request_irq(link, &link->irq);
      if (i != CS_SUCCESS) {
            cs_error(link, RequestIRQ, i);
            link->irq.AssignedIRQ = 0;
      }

      i = pcmcia_request_configuration(link, &link->conf);
      if (i != CS_SUCCESS) {
            cs_error(link, RequestConfiguration, i);
            goto failed;
      }

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

      strcpy(info->node.dev_name, info->hdev->name);
      link->dev_node = &info->node;

      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 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,
      .drv        = {
            .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);

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