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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/bluetooth/btuart_cs.c
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!
Diffstat (limited to 'drivers/bluetooth/btuart_cs.c')
-rw-r--r--drivers/bluetooth/btuart_cs.c880
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);