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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/config.h>

#ifdef CONFIG_MODVERSIONS
#ifndef MODVERSIONS
#define MODVERSIONS
#endif
#include <linux/version.h>
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
#include <linux/modversions.h>
#else
#include <config/modversions.h>
#endif
#endif

#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/timer.h>
#include <linux/errno.h>
#include <linux/ptrace.h>
#include <linux/ioport.h>
#include <linux/spinlock.h>
#include <linux/skbuff.h>
#include <asm/io.h>

#include <pcmcia/version.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>
#include <affix/bluez.h>



/* ======================== Module parameters ======================== */


/* Bit map of interrupts to choose from */
static u_int irq_mask = 0x86bc;
static int irq_list[4] = { -1 };

MODULE_PARM(irq_mask, "i");
MODULE_PARM(irq_list, "1-4i");

MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
MODULE_DESCRIPTION("BlueZ driver for the Anycom BlueCard (LSE039/LSE041)");
MODULE_LICENSE("GPL");



/* ======================== Local structures ======================== */


typedef struct bluecard_info_t {
      dev_link_t link;
      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;


void bluecard_config(dev_link_t *link);
void bluecard_release(u_long arg);
int bluecard_event(event_t event, int priority, event_callback_args_t *args);

static dev_info_t dev_info = "bluecard_cs";

dev_link_t *bluecard_attach(void);
void bluecard_detach(dev_link_t *);

static dev_link_t *dev_list = NULL;

#if LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)
static struct pcmcia_driver bluecard_driver = {
      .drv        = {
            .name = "bluecard_cs",
      },
      .attach           = bluecard_attach,
      .detach           = bluecard_detach,
      .owner            = THIS_MODULE,
};
#endif

/* 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 ======================== */


void bluecard_activity_led_timeout(u_long arg)
{
      bluecard_info_t *info = (bluecard_info_t *)arg;
      unsigned int iobase = info->link.io.BasePort1;

      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->link.io.BasePort1;

      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) {
            printk(KERN_WARNING "bluecard_cs: Call of write_wakeup for unknown device.\n");
            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->link.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 (!(info->link.state & DEV_PRESENT))
                  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 (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 (skb->pkt_type & 0x80) {

                  wait_queue_head_t wait;
                  unsigned char baud_reg;

                  switch (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 */
                  init_waitqueue_head(&wait);
                  interruptible_sleep_on_timeout(&wait, HZ / 10);

                  /* 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 */
                  interruptible_sleep_on_timeout(&wait, HZ);

            }

            if (len == skb->len) {
                  dev_kfree_skb_any(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) {
            printk(KERN_WARNING "bluecard_cs: Call of receive for unknown device.\n");
            return;
      }

      iobase = info->link.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 = bluez_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) {
                        printk(KERN_WARNING "bluecard_cs: Can't allocate mem for new packet.\n");
                        return;
                  }
            }

            if (info->rx_state == RECV_WAIT_PACKET_TYPE) {

                  info->rx_skb->dev = (void *)&(info->hdev);
                  info->rx_skb->pkt_type = buf[i];

                  switch (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);
                        }

                        dev_kfree_skb_any(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 */
                        printk(KERN_WARNING "bluecard_cs: Unknown HCI packet with type 0x%02x received.\n", info->rx_skb->pkt_type);
                        info->hdev.stat.err_rx++;

                        dev_kfree_skb_any(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;
                        hci_event_hdr *eh;
                        hci_acl_hdr *ah;
                        hci_sco_hdr *sh;

                        switch (info->rx_state) {

                        case RECV_WAIT_EVENT_HEADER:
                              eh = (hci_event_hdr *)(info->rx_skb->data);
                              info->rx_state = RECV_WAIT_DATA;
                              info->rx_count = eh->plen;
                              break;

                        case RECV_WAIT_ACL_HEADER:
                              ah = (hci_acl_hdr *)(info->rx_skb->data);
                              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->data);
                              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;
}


void bluecard_interrupt(int irq, void *dev_inst, struct pt_regs *regs)
{
      bluecard_info_t *info = dev_inst;
      unsigned int iobase;
      unsigned char reg;

      if (!info) {
            printk(KERN_WARNING "bluecard_cs: Call of irq %d for unknown device.\n", irq);
            return;
      }

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

      iobase = info->link.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));
}



/* ======================== 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 = bluez_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) {
            printk(KERN_WARNING "bluecard_cs: Can't allocate mem for new packet.\n");
            return -1;
      }

      switch (baud) {
      case 460800:
            cmd[4] = 0x00;
            skb->pkt_type = PKT_BAUD_RATE_460800;
            break;
      case 230400:
            cmd[4] = 0x01;
            skb->pkt_type = PKT_BAUD_RATE_230400;
            break;
      case 115200:
            cmd[4] = 0x02;
            skb->pkt_type = PKT_BAUD_RATE_115200;
            break;
      case 57600:
            /* Fall through... */
      default:
            cmd[4] = 0x03;
            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->link.io.BasePort1;

      bluecard_hci_set_baud_rate(hdev, DEFAULT_BAUD_RATE);

      if (test_and_set_bit(HCI_RUNNING, &(hdev->flags)))
            return 0;

      /* 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->link.io.BasePort1;

      if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags)))
            return 0;

      bluecard_hci_flush(hdev);

      /* 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) {
            printk(KERN_WARNING "bluecard_cs: Frame for unknown HCI device (hdev=NULL).");
            return -ENODEV;
      }

      info = (bluecard_info_t *)(hdev->driver_data);

      switch (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), &(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 ======================== */


int bluecard_open(bluecard_info_t *info)
{
      unsigned int iobase = info->link.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;

      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 */
      set_current_state(TASK_INTERRUPTIBLE);
      schedule_timeout(HZ / 100);

      /* 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);

      /* 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 */
      set_current_state(TASK_INTERRUPTIBLE);
      schedule_timeout((HZ * 5) / 4);           // or set it to 3/2


      /* Initialize and register HCI device */

      hdev = &(info->hdev);

      hdev->type = HCI_PCCARD;
      hdev->driver_data = info;

      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;

      if (hci_register_dev(hdev) < 0) {
            printk(KERN_WARNING "bluecard_cs: Can't register HCI device %s.\n", hdev->name);
            return -ENODEV;
      }

      return 0;
}


int bluecard_close(bluecard_info_t *info)
{
      unsigned int iobase = info->link.io.BasePort1;
      struct hci_dev *hdev = &(info->hdev);

      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)
            printk(KERN_WARNING "bluecard_cs: Can't unregister HCI device %s.\n", hdev->name);

      return 0;
}



/* ======================== Card services ======================== */


#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
static void cs_error(client_handle_t handle, int func, int ret)
{
      error_info_t err = { func, ret };

      CardServices(ReportError, handle, &err);
}
#endif

dev_link_t *bluecard_attach(void)
{
      bluecard_info_t *info;
      client_reg_t client_reg;
      dev_link_t *link;
      int i, ret;

      /* Create new info device */
      info = kmalloc(sizeof(*info), GFP_KERNEL);
      if (!info)
            return NULL;
      memset(info, 0, sizeof(*info));

      link = &info->link;
      link->priv = info;

#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
      link->release.function = &bluecard_release;
      link->release.data = (u_long)link;
#endif
      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_INFO2_VALID | IRQ_LEVEL_ID;

      if (irq_list[0] == -1)
            link->irq.IRQInfo2 = irq_mask;
      else
            for (i = 0; i < 4; i++)
                  link->irq.IRQInfo2 |= 1 << irq_list[i];

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

      link->conf.Attributes = CONF_ENABLE_IRQ;
      link->conf.Vcc = 50;
      link->conf.IntType = INT_MEMORY_AND_IO;

      /* Register with Card Services */
      link->next = dev_list;
      dev_list = link;
      client_reg.dev_info = &dev_info;
      client_reg.Attributes = INFO_IO_CLIENT | INFO_CARD_SHARE;
      client_reg.EventMask =
            CS_EVENT_CARD_INSERTION | CS_EVENT_CARD_REMOVAL |
            CS_EVENT_RESET_PHYSICAL | CS_EVENT_CARD_RESET |
            CS_EVENT_PM_SUSPEND | CS_EVENT_PM_RESUME;
      client_reg.event_handler = &bluecard_event;
      client_reg.Version = 0x0210;
      client_reg.event_callback_args.client_data = link;

      ret = CardServices(RegisterClient, &link->handle, &client_reg);
      if (ret != CS_SUCCESS) {
            cs_error(link->handle, RegisterClient, ret);
            bluecard_detach(link);
            return NULL;
      }

      return link;
}


void bluecard_detach(dev_link_t *link)
{
      bluecard_info_t *info = link->priv;
      dev_link_t **linkp;
      int ret;

      /* Locate device structure */
      for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
            if (*linkp == link)
                  break;

      if (*linkp == NULL)
            return;

#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
      del_timer(&link->release);
#endif
      if (link->state & DEV_CONFIG)
            bluecard_release((u_long)link);

      if (link->handle) {
            ret = CardServices(DeregisterClient, link->handle);
            if (ret != CS_SUCCESS)
                  cs_error(link->handle, DeregisterClient, ret);
      }

      /* Unlink device structure, free bits */
      *linkp = link->next;

      kfree(info);
}


static int get_tuple(int fn, client_handle_t handle, tuple_t *tuple, cisparse_t *parse)
{
      int i;

      i = CardServices(fn, handle, tuple);
      if (i != CS_SUCCESS)
            return CS_NO_MORE_ITEMS;

      i = CardServices(GetTupleData, handle, tuple);
      if (i != CS_SUCCESS)
            return i;

      return CardServices(ParseTuple, handle, tuple, parse);
}


#define first_tuple(a, b, c) get_tuple(GetFirstTuple, a, b, c)
#define next_tuple(a, b, c) get_tuple(GetNextTuple, a, b, c)

void bluecard_config(dev_link_t *link)
{
      client_handle_t handle = link->handle;
      bluecard_info_t *info = link->priv;
      tuple_t tuple;
      u_short buf[256];
      cisparse_t parse;
      config_info_t config;
      int i, n, last_ret, last_fn;

      tuple.TupleData = (cisdata_t *)buf;
      tuple.TupleOffset = 0;
      tuple.TupleDataMax = 255;
      tuple.Attributes = 0;

      /* Get configuration register information */
      tuple.DesiredTuple = CISTPL_CONFIG;
      last_ret = first_tuple(handle, &tuple, &parse);
      if (last_ret != CS_SUCCESS) {
            last_fn = ParseTuple;
            goto cs_failed;
      }
      link->conf.ConfigBase = parse.config.base;
      link->conf.Present = parse.config.rmask[0];

      /* Configure card */
      link->state |= DEV_CONFIG;
      i = CardServices(GetConfigurationInfo, handle, &config);
      link->conf.Vcc = config.Vcc;

      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 = CardServices(RequestIO, link->handle, &link->io);
            if (i == CS_SUCCESS)
                  break;
      }

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

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

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

#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0)
        MOD_INC_USE_COUNT;
#endif

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

      strcpy(info->node.dev_name, info->hdev.name);
      link->dev = &info->node;
      link->state &= ~DEV_CONFIG_PENDING;

      return;

cs_failed:
      cs_error(link->handle, last_fn, last_ret);

failed:
      bluecard_release((u_long)link);
}


void bluecard_release(u_long arg)
{
      dev_link_t *link = (dev_link_t *)arg;
      bluecard_info_t *info = link->priv;

      if (link->state & DEV_PRESENT)
            bluecard_close(info);

#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0)
      MOD_DEC_USE_COUNT;
#endif

      link->dev = NULL;

      CardServices(ReleaseConfiguration, link->handle);
      CardServices(ReleaseIO, link->handle, &link->io);
      CardServices(ReleaseIRQ, link->handle, &link->irq);

      link->state &= ~DEV_CONFIG;
}


int bluecard_event(event_t event, int priority, event_callback_args_t *args)
{
      dev_link_t *link = args->client_data;
      bluecard_info_t *info = link->priv;

      switch (event) {
      case CS_EVENT_CARD_REMOVAL:
            link->state &= ~DEV_PRESENT;
            if (link->state & DEV_CONFIG) {
                  bluecard_close(info);
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
                  mod_timer(&link->release, jiffies + HZ / 20);
#endif
            }
            break;
      case CS_EVENT_CARD_INSERTION:
            link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
            bluecard_config(link);
            break;
      case CS_EVENT_PM_SUSPEND:
            link->state |= DEV_SUSPEND;
            /* Fall through... */
      case CS_EVENT_RESET_PHYSICAL:
            if (link->state & DEV_CONFIG)
                  CardServices(ReleaseConfiguration, link->handle);
            break;
      case CS_EVENT_PM_RESUME:
            link->state &= ~DEV_SUSPEND;
            /* Fall through... */
      case CS_EVENT_CARD_RESET:
            if (DEV_OK(link))
                  CardServices(RequestConfiguration, link->handle, &link->conf);
            break;
      }

      return 0;
}



/* ======================== Module initialization ======================== */


int __init init_bluecard_cs(void)
{
      servinfo_t serv;
      int err;

      CardServices(GetCardServicesInfo, &serv);
      if (serv.Revision != CS_RELEASE_CODE) {
            printk(KERN_NOTICE "bluecard_cs: Card Services release does not match!\n");
            return -1;
      }

#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
      err = register_pccard_driver(&dev_info, &bluecard_attach, &bluecard_detach);
#else
      err = pcmcia_register_driver(&bluecard_driver);
#endif

      return err;
}


void __exit exit_bluecard_cs(void)
{
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
      unregister_pccard_driver(&dev_info);
#else
      pcmcia_unregister_driver(&bluecard_driver);
#endif

      while (dev_list != NULL)
            bluecard_detach(dev_list);
}


module_init(init_bluecard_cs);
module_exit(exit_bluecard_cs);

EXPORT_NO_SYMBOLS;

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