Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 880 insertions, 0 deletions

diff --git a/drivers/bluetooth/btuart_cs.c b/drivers/bluetooth/btuart_cs.c
new file mode 100644
index 000000000000..ad8d972444a5
--- /dev/null
+++ b/drivers/bluetooth/btuart_cs.c
@@ -0,0 +1,880 @@
+/*
+ *
+ *  Driver for Bluetooth PCMCIA cards with HCI UART interface
+ *
+ *  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>
+#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/errno.h>
+#include <linux/ptrace.h>
+#include <linux/ioport.h>
+#include <linux/spinlock.h>
+#include <linux/moduleparam.h>
+
+#include <linux/skbuff.h>
+#include <linux/string.h>
+#include <linux/serial.h>
+#include <linux/serial_reg.h>
+#include <linux/bitops.h>
+#include <asm/system.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>
+
+
+
+/* ======================== Module parameters ======================== */
+
+
+MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
+MODULE_DESCRIPTION("Bluetooth driver for Bluetooth PCMCIA cards with HCI UART interface");
+MODULE_LICENSE("GPL");
+
+
+
+/* ======================== Local structures ======================== */
+
+
+typedef struct btuart_info_t {
+        dev_link_t link;
+        dev_node_t node;
+
+        struct hci_dev *hdev;
+
+        spinlock_t lock;        /* For serializing operations */
+
+        struct sk_buff_head txq;
+        unsigned long tx_state;
+
+        unsigned long rx_state;
+        unsigned long rx_count;
+        struct sk_buff *rx_skb;
+} btuart_info_t;
+
+
+static void btuart_config(dev_link_t *link);
+static void btuart_release(dev_link_t *link);
+static int btuart_event(event_t event, int priority, event_callback_args_t *args);
+
+static dev_info_t dev_info = "btuart_cs";
+
+static dev_link_t *btuart_attach(void);
+static void btuart_detach(dev_link_t *);
+
+static dev_link_t *dev_list = NULL;
+
+
+/* Maximum baud rate */
+#define SPEED_MAX  115200
+
+/* Default baud rate: 57600, 115200, 230400 or 460800 */
+#define DEFAULT_BAUD_RATE  115200
+
+
+/* Transmit states  */
+#define XMIT_SENDING    1
+#define XMIT_WAKEUP     2
+#define XMIT_WAITING    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
+
+
+
+/* ======================== Interrupt handling ======================== */
+
+
+static int btuart_write(unsigned int iobase, int fifo_size, __u8 *buf, int len)
+{
+        int actual = 0;
+
+        /* Tx FIFO should be empty */
+        if (!(inb(iobase + UART_LSR) & UART_LSR_THRE))
+                return 0;
+
+        /* Fill FIFO with current frame */
+        while ((fifo_size-- > 0) && (actual < len)) {
+                /* Transmit next byte */
+                outb(buf[actual], iobase + UART_TX);
+                actual++;
+        }
+
+        return actual;
+}
+
+
+static void btuart_write_wakeup(btuart_info_t *info)
+{
+        if (!info) {
+                BT_ERR("Unknown device");
+                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 struct sk_buff *skb;
+                register int len;
+
+                clear_bit(XMIT_WAKEUP, &(info->tx_state));
+
+                if (!(info->link.state & DEV_PRESENT))
+                        return;
+
+                if (!(skb = skb_dequeue(&(info->txq))))
+                        break;
+
+                /* Send frame */
+                len = btuart_write(iobase, 16, skb->data, skb->len);
+                set_bit(XMIT_WAKEUP, &(info->tx_state));
+
+                if (len == skb->len) {
+                        kfree_skb(skb);
+                } else {
+                        skb_pull(skb, len);
+                        skb_queue_head(&(info->txq), skb);
+                }
+
+                info->hdev->stat.byte_tx += len;
+
+        } while (test_bit(XMIT_WAKEUP, &(info->tx_state)));
+
+        clear_bit(XMIT_SENDING, &(info->tx_state));
+}
+
+
+static void btuart_receive(btuart_info_t *info)
+{
+        unsigned int iobase;
+        int boguscount = 0;
+
+        if (!info) {
+                BT_ERR("Unknown device");
+                return;
+        }
+
+        iobase = info->link.io.BasePort1;
+
+        do {
+                info->hdev->stat.byte_rx++;
+
+                /* 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;
+                        info->rx_skb->pkt_type = inb(iobase + UART_RX);
+
+                        switch (info->rx_skb->pkt_type) {
+
+                        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", info->rx_skb->pkt_type);
+                                info->hdev->stat.err_rx++;
+                                clear_bit(HCI_RUNNING, &(info->hdev->flags));
+
+                                kfree_skb(info->rx_skb);
+                                info->rx_skb = NULL;
+                                break;
+
+                        }
+
+                } else {
+
+                        *skb_put(info->rx_skb, 1) = inb(iobase + UART_RX);
+                        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 = (struct 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 = (struct 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 = (struct 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;
+
+                                }
+
+                        }
+
+                }
+
+                /* Make sure we don't stay here too long */
+                if (boguscount++ > 16)
+                        break;
+
+        } while (inb(iobase + UART_LSR) & UART_LSR_DR);
+}
+
+
+static irqreturn_t btuart_interrupt(int irq, void *dev_inst, struct pt_regs *regs)
+{
+        btuart_info_t *info = dev_inst;
+        unsigned int iobase;
+        int boguscount = 0;
+        int iir, lsr;
+
+        if (!info || !info->hdev) {
+                BT_ERR("Call of irq %d for unknown device", irq);
+                return IRQ_NONE;
+        }
+
+        iobase = info->link.io.BasePort1;
+
+        spin_lock(&(info->lock));
+
+        iir = inb(iobase + UART_IIR) & UART_IIR_ID;
+        while (iir) {
+
+                /* Clear interrupt */
+                lsr = inb(iobase + UART_LSR);
+
+                switch (iir) {
+                case UART_IIR_RLSI:
+                        BT_ERR("RLSI");
+                        break;
+                case UART_IIR_RDI:
+                        /* Receive interrupt */
+                        btuart_receive(info);
+                        break;
+                case UART_IIR_THRI:
+                        if (lsr & UART_LSR_THRE) {
+                                /* Transmitter ready for data */
+                                btuart_write_wakeup(info);
+                        }
+                        break;
+                default:
+                        BT_ERR("Unhandled IIR=%#x", iir);
+                        break;
+                }
+
+                /* Make sure we don't stay here too long */
+                if (boguscount++ > 100)
+                        break;
+
+                iir = inb(iobase + UART_IIR) & UART_IIR_ID;
+
+        }
+
+        spin_unlock(&(info->lock));
+
+        return IRQ_HANDLED;
+}
+
+
+static void btuart_change_speed(btuart_info_t *info, unsigned int speed)
+{
+        unsigned long flags;
+        unsigned int iobase;
+        int fcr;                /* FIFO control reg */
+        int lcr;                /* Line control reg */
+        int divisor;
+
+        if (!info) {
+                BT_ERR("Unknown device");
+                return;
+        }
+
+        iobase = info->link.io.BasePort1;
+
+        spin_lock_irqsave(&(info->lock), flags);
+
+        /* Turn off interrupts */
+        outb(0, iobase + UART_IER);
+
+        divisor = SPEED_MAX / speed;
+
+        fcr = UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT;
+
+        /* 
+         * Use trigger level 1 to avoid 3 ms. timeout delay at 9600 bps, and
+         * almost 1,7 ms at 19200 bps. At speeds above that we can just forget
+         * about this timeout since it will always be fast enough. 
+         */
+
+        if (speed < 38400)
+                fcr |= UART_FCR_TRIGGER_1;
+        else
+                fcr |= UART_FCR_TRIGGER_14;
+
+        /* Bluetooth cards use 8N1 */
+        lcr = UART_LCR_WLEN8;
+
+        outb(UART_LCR_DLAB | lcr, iobase + UART_LCR);   /* Set DLAB */
+        outb(divisor & 0xff, iobase + UART_DLL);        /* Set speed */
+        outb(divisor >> 8, iobase + UART_DLM);
+        outb(lcr, iobase + UART_LCR);   /* Set 8N1  */
+        outb(fcr, iobase + UART_FCR);   /* Enable FIFO's */
+
+        /* Turn on interrups */
+        outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER);
+
+        spin_unlock_irqrestore(&(info->lock), flags);
+}
+
+
+
+/* ======================== HCI interface ======================== */
+
+
+static int btuart_hci_flush(struct hci_dev *hdev)
+{
+        btuart_info_t *info = (btuart_info_t *)(hdev->driver_data);
+
+        /* Drop TX queue */
+        skb_queue_purge(&(info->txq));
+
+        return 0;
+}
+
+
+static int btuart_hci_open(struct hci_dev *hdev)
+{
+        set_bit(HCI_RUNNING, &(hdev->flags));
+
+        return 0;
+}
+
+
+static int btuart_hci_close(struct hci_dev *hdev)
+{
+        if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags)))
+                return 0;
+
+        btuart_hci_flush(hdev);
+
+        return 0;
+}
+
+
+static int btuart_hci_send_frame(struct sk_buff *skb)
+{
+        btuart_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 = (btuart_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);
+
+        btuart_write_wakeup(info);
+
+        return 0;
+}
+
+
+static void btuart_hci_destruct(struct hci_dev *hdev)
+{
+}
+
+
+static int btuart_hci_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg)
+{
+        return -ENOIOCTLCMD;
+}
+
+
+
+/* ======================== Card services HCI interaction ======================== */
+
+
+static int btuart_open(btuart_info_t *info)
+{
+        unsigned long flags;
+        unsigned int iobase = info->link.io.BasePort1;
+        struct hci_dev *hdev;
+
+        spin_lock_init(&(info->lock));
+
+        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;
+
+        hdev->open     = btuart_hci_open;
+        hdev->close    = btuart_hci_close;
+        hdev->flush    = btuart_hci_flush;
+        hdev->send     = btuart_hci_send_frame;
+        hdev->destruct = btuart_hci_destruct;
+        hdev->ioctl    = btuart_hci_ioctl;
+
+        hdev->owner = THIS_MODULE;
+
+        spin_lock_irqsave(&(info->lock), flags);
+
+        /* Reset UART */
+        outb(0, iobase + UART_MCR);
+
+        /* Turn off interrupts */
+        outb(0, iobase + UART_IER);
+
+        /* Initialize UART */
+        outb(UART_LCR_WLEN8, iobase + UART_LCR);        /* Reset DLAB */
+        outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase + UART_MCR);
+
+        /* Turn on interrupts */
+        // outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER);
+
+        spin_unlock_irqrestore(&(info->lock), flags);
+
+        btuart_change_speed(info, DEFAULT_BAUD_RATE);
+
+        /* Timeout before it is safe to send the first HCI packet */
+        msleep(1000);
+
+        /* 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 btuart_close(btuart_info_t *info)
+{
+        unsigned long flags;
+        unsigned int iobase = info->link.io.BasePort1;
+        struct hci_dev *hdev = info->hdev;
+
+        if (!hdev)
+                return -ENODEV;
+
+        btuart_hci_close(hdev);
+
+        spin_lock_irqsave(&(info->lock), flags);
+
+        /* Reset UART */
+        outb(0, iobase + UART_MCR);
+
+        /* Turn off interrupts */
+        outb(0, iobase + UART_IER);
+
+        spin_unlock_irqrestore(&(info->lock), flags);
+
+        if (hci_unregister_dev(hdev) < 0)
+                BT_ERR("Can't unregister HCI device %s", hdev->name);
+
+        hci_free_dev(hdev);
+
+        return 0;
+}
+
+static dev_link_t *btuart_attach(void)
+{
+        btuart_info_t *info;
+        client_reg_t client_reg;
+        dev_link_t *link;
+        int 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;
+
+        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 = btuart_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.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 = &btuart_event;
+        client_reg.Version = 0x0210;
+        client_reg.event_callback_args.client_data = link;
+
+        ret = pcmcia_register_client(&link->handle, &client_reg);
+        if (ret != CS_SUCCESS) {
+                cs_error(link->handle, RegisterClient, ret);
+                btuart_detach(link);
+                return NULL;
+        }
+
+        return link;
+}
+
+
+static void btuart_detach(dev_link_t *link)
+{
+        btuart_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 (link->state & DEV_CONFIG)
+                btuart_release(link);
+
+        if (link->handle) {
+                ret = pcmcia_deregister_client(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(client_handle_t handle, tuple_t *tuple, cisparse_t *parse)
+{
+        int i;
+
+        i = pcmcia_get_tuple_data(handle, tuple);
+        if (i != CS_SUCCESS)
+                return i;
+
+        return pcmcia_parse_tuple(handle, tuple, parse);
+}
+
+static int first_tuple(client_handle_t handle, tuple_t *tuple, cisparse_t *parse)
+{
+        if (pcmcia_get_first_tuple(handle, tuple) != CS_SUCCESS)
+                return CS_NO_MORE_ITEMS;
+        return get_tuple(handle, tuple, parse);
+}
+
+static int next_tuple(client_handle_t handle, tuple_t *tuple, cisparse_t *parse)
+{
+        if (pcmcia_get_next_tuple(handle, tuple) != CS_SUCCESS)
+                return CS_NO_MORE_ITEMS;
+        return get_tuple(handle, tuple, parse);
+}
+
+static void btuart_config(dev_link_t *link)
+{
+        static kio_addr_t base[5] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, 0x0 };
+        client_handle_t handle = link->handle;
+        btuart_info_t *info = link->priv;
+        tuple_t tuple;
+        u_short buf[256];
+        cisparse_t parse;
+        cistpl_cftable_entry_t *cf = &parse.cftable_entry;
+        config_info_t config;
+        int i, j, try, 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 = pcmcia_get_configuration_info(handle, &config);
+        link->conf.Vcc = config.Vcc;
+
+        /* First pass: look for a config entry that looks normal. */
+        tuple.TupleData = (cisdata_t *) buf;
+        tuple.TupleOffset = 0;
+        tuple.TupleDataMax = 255;
+        tuple.Attributes = 0;
+        tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
+        /* Two tries: without IO aliases, then with aliases */
+        for (try = 0; try < 2; try++) {
+                i = first_tuple(handle, &tuple, &parse);
+                while (i != CS_NO_MORE_ITEMS) {
+                        if (i != CS_SUCCESS)
+                                goto next_entry;
+                        if (cf->vpp1.present & (1 << CISTPL_POWER_VNOM))
+                                link->conf.Vpp1 = link->conf.Vpp2 = cf->vpp1.param[CISTPL_POWER_VNOM] / 10000;
+                        if ((cf->io.nwin > 0) && (cf->io.win[0].len == 8) && (cf->io.win[0].base != 0)) {
+                                link->conf.ConfigIndex = cf->index;
+                                link->io.BasePort1 = cf->io.win[0].base;
+                                link->io.IOAddrLines = (try == 0) ? 16 : cf->io.flags & CISTPL_IO_LINES_MASK;
+                                i = pcmcia_request_io(link->handle, &link->io);
+                                if (i == CS_SUCCESS)
+                                        goto found_port;
+                        }
+next_entry:
+                        i = next_tuple(handle, &tuple, &parse);
+                }
+        }
+
+        /* Second pass: try to find an entry that isn't picky about
+           its base address, then try to grab any standard serial port
+           address, and finally try to get any free port. */
+        i = first_tuple(handle, &tuple, &parse);
+        while (i != CS_NO_MORE_ITEMS) {
+                if ((i == CS_SUCCESS) && (cf->io.nwin > 0)
+                    && ((cf->io.flags & CISTPL_IO_LINES_MASK) <= 3)) {
+                        link->conf.ConfigIndex = cf->index;
+                        for (j = 0; j < 5; j++) {
+                                link->io.BasePort1 = base[j];
+                                link->io.IOAddrLines = base[j] ? 16 : 3;
+                                i = pcmcia_request_io(link->handle, &link->io);
+                                if (i == CS_SUCCESS)
+                                        goto found_port;
+                        }
+                }
+                i = next_tuple(handle, &tuple, &parse);
+        }
+
+found_port:
+        if (i != CS_SUCCESS) {
+                BT_ERR("No usable port range found");
+                cs_error(link->handle, RequestIO, i);
+                goto failed;
+        }
+
+        i = pcmcia_request_irq(link->handle, &link->irq);
+        if (i != CS_SUCCESS) {
+                cs_error(link->handle, RequestIRQ, i);
+                link->irq.AssignedIRQ = 0;
+        }
+
+        i = pcmcia_request_configuration(link->handle, &link->conf);
+        if (i != CS_SUCCESS) {
+                cs_error(link->handle, RequestConfiguration, i);
+                goto failed;
+        }
+
+        if (btuart_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:
+        btuart_release(link);
+}
+
+
+static void btuart_release(dev_link_t *link)
+{
+        btuart_info_t *info = link->priv;
+
+        if (link->state & DEV_PRESENT)
+                btuart_close(info);
+
+        link->dev = NULL;
+
+        pcmcia_release_configuration(link->handle);
+        pcmcia_release_io(link->handle, &link->io);
+        pcmcia_release_irq(link->handle, &link->irq);
+
+        link->state &= ~DEV_CONFIG;
+}
+
+
+static int btuart_event(event_t event, int priority, event_callback_args_t *args)
+{
+        dev_link_t *link = args->client_data;
+        btuart_info_t *info = link->priv;
+
+        switch (event) {
+        case CS_EVENT_CARD_REMOVAL:
+                link->state &= ~DEV_PRESENT;
+                if (link->state & DEV_CONFIG) {
+                        btuart_close(info);
+                        btuart_release(link);
+                }
+                break;
+        case CS_EVENT_CARD_INSERTION:
+                link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
+                btuart_config(link);
+                break;
+        case CS_EVENT_PM_SUSPEND:
+                link->state |= DEV_SUSPEND;
+                /* Fall through... */
+        case CS_EVENT_RESET_PHYSICAL:
+                if (link->state & DEV_CONFIG)
+                        pcmcia_release_configuration(link->handle);
+                break;
+        case CS_EVENT_PM_RESUME:
+                link->state &= ~DEV_SUSPEND;
+                /* Fall through... */
+        case CS_EVENT_CARD_RESET:
+                if (DEV_OK(link))
+                        pcmcia_request_configuration(link->handle, &link->conf);
+                break;
+        }
+
+        return 0;
+}
+
+static struct pcmcia_driver btuart_driver = {
+        .owner          = THIS_MODULE,
+        .drv            = {
+                .name   = "btuart_cs",
+        },
+        .attach         = btuart_attach,
+        .detach         = btuart_detach,
+};
+
+static int __init init_btuart_cs(void)
+{
+        return pcmcia_register_driver(&btuart_driver);
+}
+
+
+static void __exit exit_btuart_cs(void)
+{
+        pcmcia_unregister_driver(&btuart_driver);
+        BUG_ON(dev_list != NULL);
+}
+
+module_init(init_btuart_cs);
+module_exit(exit_btuart_cs);