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


struct bluecard_info {
        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 */
};


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_ACTIVITY          2
#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(struct timer_list *t)
{
        struct bluecard_info *info = timer_container_of(info, t, timer);
        unsigned int iobase = info->p_dev->resource[0]->start;

        if (test_bit(CARD_ACTIVITY, &(info->hw_state))) {
                /* leave LED in inactive state for HZ/10 for blink effect */
                clear_bit(CARD_ACTIVITY, &(info->hw_state));
                mod_timer(&(info->timer), jiffies + HZ / 10);
        }

        /* Disable activity LED, enable power LED */
        outb(0x08 | 0x20, iobase + 0x30);
}


static void bluecard_enable_activity_led(struct bluecard_info *info)
{
        unsigned int iobase = info->p_dev->resource[0]->start;

        /* don't disturb running blink timer */
        if (timer_pending(&(info->timer)))
                return;

        set_bit(CARD_ACTIVITY, &(info->hw_state));

        if (test_bit(CARD_HAS_ACTIVITY_LED, &(info->hw_state))) {
                /* Enable activity LED, keep power LED enabled */
                outb(0x18 | 0x60, iobase + 0x30);
        } else {
                /* Disable power LED */
                outb(0x00, iobase + 0x30);
        }

        /* Stop the LED after HZ/10 */
        mod_timer(&(info->timer), jiffies + HZ / 10);
}



/* ======================== 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(struct bluecard_info *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 {
                unsigned int iobase = info->p_dev->resource[0]->start;
                unsigned int offset;
                unsigned char command;
                unsigned long ready_bit;
                register struct sk_buff *skb;
                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;
                }

                skb = skb_dequeue(&(info->txq));
                if (!skb)
                        break;

                if (hci_skb_pkt_type(skb) & 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 (hci_skb_pkt_type(skb) & 0x80) {
                        DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);
                        DEFINE_WAIT(wait);

                        unsigned char baud_reg;

                        switch (hci_skb_pkt_type(skb)) {
                        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:
                        default:
                                baud_reg = REG_CONTROL_BAUD_RATE_57600;
                                break;
                        }

                        /* Wait until the command reaches the baseband */
                        mdelay(100);

                        /* 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 */
                        mdelay(1000);
                }

                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(struct bluecard_info *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) {
                        info->rx_state = RECV_WAIT_PACKET_TYPE;
                        info->rx_count = 0;
                        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");
                                return;
                        }
                }

                if (info->rx_state == RECV_WAIT_PACKET_TYPE) {

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

                        switch (hci_skb_pkt_type(info->rx_skb)) {

                        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",
                                       hci_skb_pkt_type(info->rx_skb));
                                info->hdev->stat.err_rx++;

                                kfree_skb(info->rx_skb);
                                info->rx_skb = NULL;
                                break;

                        }

                } else {

                        skb_put_u8(info->rx_skb, 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->hdev, info->rx_skb);
                                        info->rx_skb = NULL;
                                        break;

                                }

                        }

                }


        }

        info->hdev->stat.byte_rx += len;
}


static irqreturn_t bluecard_interrupt(int irq, void *dev_inst)
{
        struct bluecard_info *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)
{
        struct bluecard_info *info = hci_get_drvdata(hdev);
        struct sk_buff *skb;

        /* Ericsson baud rate command */
        unsigned char cmd[] = { HCI_COMMAND_PKT, 0x09, 0xfc, 0x01, 0x03 };

        skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_KERNEL);
        if (!skb) {
                BT_ERR("Can't allocate mem for new packet");
                return -1;
        }

        switch (baud) {
        case 460800:
                cmd[4] = 0x00;
                hci_skb_pkt_type(skb) = PKT_BAUD_RATE_460800;
                break;
        case 230400:
                cmd[4] = 0x01;
                hci_skb_pkt_type(skb) = PKT_BAUD_RATE_230400;
                break;
        case 115200:
                cmd[4] = 0x02;
                hci_skb_pkt_type(skb) = PKT_BAUD_RATE_115200;
                break;
        case 57600:
        default:
                cmd[4] = 0x03;
                hci_skb_pkt_type(skb) = PKT_BAUD_RATE_57600;
                break;
        }

        skb_put_data(skb, 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)
{
        struct bluecard_info *info = hci_get_drvdata(hdev);

        /* Drop TX queue */
        skb_queue_purge(&(info->txq));

        return 0;
}


static int bluecard_hci_open(struct hci_dev *hdev)
{
        struct bluecard_info *info = hci_get_drvdata(hdev);
        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);

        /* Enable power LED */
        outb(0x08 | 0x20, iobase + 0x30);

        return 0;
}


static int bluecard_hci_close(struct hci_dev *hdev)
{
        struct bluecard_info *info = hci_get_drvdata(hdev);
        unsigned int iobase = info->p_dev->resource[0]->start;

        bluecard_hci_flush(hdev);

        /* Stop LED timer */
        timer_delete_sync(&(info->timer));

        /* Disable power LED */
        outb(0x00, iobase + 0x30);

        return 0;
}


static int bluecard_hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
{
        struct bluecard_info *info = hci_get_drvdata(hdev);

        switch (hci_skb_pkt_type(skb)) {
        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), &hci_skb_pkt_type(skb), 1);
        skb_queue_tail(&(info->txq), skb);

        bluecard_write_wakeup(info);

        return 0;
}



/* ======================== Card services HCI interaction ======================== */


static int bluecard_open(struct bluecard_info *info)
{
        unsigned int iobase = info->p_dev->resource[0]->start;
        struct hci_dev *hdev;
        unsigned char id;

        spin_lock_init(&(info->lock));

        timer_setup(&info->timer, bluecard_activity_led_timeout, 0);

        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;
        hci_set_drvdata(hdev, 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;

        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(struct bluecard_info *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)
{
        struct bluecard_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;

        return bluecard_config(link);
}


static void bluecard_detach(struct pcmcia_device *link)
{
        bluecard_release(link);
}


static int bluecard_config(struct pcmcia_device *link)
{
        struct bluecard_info *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)
{
        struct bluecard_info *info = link->priv;

        bluecard_close(info);

        timer_delete_sync(&(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,
};
module_pcmcia_driver(bluecard_driver);