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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [drivers/] [bluetooth/] [btuart_cs.c] - Blame information for rev 1765

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/*
 *
 *  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/timer.h>
#include <linux/errno.h>
#include <linux/ptrace.h>
#include <linux/ioport.h>
#include <linux/spinlock.h>
 
#include <linux/skbuff.h>
#include <linux/string.h>
#include <linux/serial.h>
#include <linux/serial_reg.h>
#include <asm/system.h>
#include <asm/bitops.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 ======================== */
 
 
/* Bit map of interrupts to choose from */
static u_int irq_mask = 0xffff;
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 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;
 
 
void btuart_config(dev_link_t *link);
void btuart_release(u_long arg);
int btuart_event(event_t event, int priority, event_callback_args_t *args);
 
static dev_info_t dev_info = "btuart_cs";
 
dev_link_t *btuart_attach(void);
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) {
                printk(KERN_WARNING "btuart_cs: Call of write_wakeup for unknown device.\n");
                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) {
                printk(KERN_WARNING "btuart_cs: Call of receive for unknown device.\n");
                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 = bluez_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) {
                                printk(KERN_WARNING "btuart_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 = 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 */
                                printk(KERN_WARNING "btuart_cs: Unknown HCI packet with type 0x%02x received.\n", 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;
                                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;
 
                                }
 
                        }
 
                }
 
                /* Make sure we don't stay here to long */
                if (boguscount++ > 16)
                        break;
 
        } while (inb(iobase + UART_LSR) & UART_LSR_DR);
}
 
 
void 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) {
                printk(KERN_WARNING "btuart_cs: Call of irq %d for unknown device.\n", irq);
                return;
        }
 
        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:
                        printk(KERN_NOTICE "btuart_cs: RLSI\n");
                        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:
                        printk(KERN_NOTICE "btuart_cs: Unhandled IIR=%#x\n", iir);
                        break;
                }
 
                /* Make sure we don't stay here to long */
                if (boguscount++ > 100)
                        break;
 
                iir = inb(iobase + UART_IIR) & UART_IIR_ID;
 
        }
 
        spin_unlock(&(info->lock));
}
 
 
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) {
                printk(KERN_WARNING "btuart_cs: Call of change speed for unknown device.\n");
                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) {
                printk(KERN_WARNING "btuart_cs: 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 ======================== */
 
 
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;
 
        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 */
        set_current_state(TASK_INTERRUPTIBLE);
        schedule_timeout(HZ);
 
 
        /* Initialize and register HCI device */
 
        hdev = &(info->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;
 
        if (hci_register_dev(hdev) < 0) {
                printk(KERN_WARNING "btuart_cs: Can't register HCI device %s.\n", hdev->name);
                return -ENODEV;
        }
 
        return 0;
}
 
 
int btuart_close(btuart_info_t *info)
{
        unsigned long flags;
        unsigned int iobase = info->link.io.BasePort1;
        struct hci_dev *hdev = &(info->hdev);
 
        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)
                printk(KERN_WARNING "btuart_cs: Can't unregister HCI device %s.\n", hdev->name);
 
        return 0;
}
 
 
 
/* ======================== Card services ======================== */
 
 
static void cs_error(client_handle_t handle, int func, int ret)
{
        error_info_t err = { func, ret };
 
        CardServices(ReportError, handle, &err);
}
 
 
dev_link_t *btuart_attach(void)
{
        btuart_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;
 
        link->release.function = &btuart_release;
        link->release.data = (u_long)link;
        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 = 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.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 = &btuart_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);
                btuart_detach(link);
                return NULL;
        }
 
        return link;
}
 
 
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;
 
        del_timer(&link->release);
        if (link->state & DEV_CONFIG)
                btuart_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 btuart_config(dev_link_t *link)
{
        static ioaddr_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 = CardServices(GetConfigurationInfo, 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 = CardServices(RequestIO, 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 = CardServices(RequestIO, link->handle, &link->io);
                                if (i == CS_SUCCESS)
                                        goto found_port;
                        }
                }
                i = next_tuple(handle, &tuple, &parse);
        }
 
found_port:
        if (i != CS_SUCCESS) {
                printk(KERN_NOTICE "btuart_cs: No usable port range found. Giving up.\n");
                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;
        }
 
        MOD_INC_USE_COUNT;
 
        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((u_long) link);
}
 
 
void btuart_release(u_long arg)
{
        dev_link_t *link = (dev_link_t *)arg;
        btuart_info_t *info = link->priv;
 
        if (link->state & DEV_PRESENT)
                btuart_close(info);
 
        MOD_DEC_USE_COUNT;
 
        link->dev = NULL;
 
        CardServices(ReleaseConfiguration, link->handle);
        CardServices(ReleaseIO, link->handle, &link->io);
        CardServices(ReleaseIRQ, link->handle, &link->irq);
 
        link->state &= ~DEV_CONFIG;
}
 
 
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);
                        mod_timer(&link->release, jiffies + HZ / 20);
                }
                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)
                        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_btuart_cs(void)
{
        servinfo_t serv;
        int err;
 
        CardServices(GetCardServicesInfo, &serv);
        if (serv.Revision != CS_RELEASE_CODE) {
                printk(KERN_NOTICE "btuart_cs: Card Services release does not match!\n");
                return -1;
        }
 
        err = register_pccard_driver(&dev_info, &btuart_attach, &btuart_detach);
 
        return err;
}
 
 
void __exit exit_btuart_cs(void)
{
        unregister_pccard_driver(&dev_info);
 
        while (dev_list != NULL)
                btuart_detach(dev_list);
}
 
 
module_init(init_btuart_cs);
module_exit(exit_btuart_cs);
 
EXPORT_NO_SYMBOLS;
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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [drivers/] [bluetooth/] [btuart_cs.c] - Blame information for rev 1765

Line No.	Rev	Author	Line
1	1275	phoenix	`/*`
2			`*`
3			`* Driver for Bluetooth PCMCIA cards with HCI UART interface`
4			`*`
5			`* Copyright (C) 2001-2002 Marcel Holtmann <marcel@holtmann.org>`
6			`*`
7			`*`
8			`* This program is free software; you can redistribute it and/or modify`
9			`* it under the terms of the GNU General Public License version 2 as`
10			`* published by the Free Software Foundation;`
11			`*`
12			`* Software distributed under the License is distributed on an "AS`
13			`* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or`
14			`* implied. See the License for the specific language governing`
15			`* rights and limitations under the License.`
16			`*`
17			`* The initial developer of the original code is David A. Hinds`
18			`* <dahinds@users.sourceforge.net>. Portions created by David A. Hinds`
19			`* are Copyright (C) 1999 David A. Hinds. All Rights Reserved.`
20			`*`
21			`*/`
22
23			`#include <linux/config.h>`
24			`#include <linux/module.h>`
25
26			`#include <linux/kernel.h>`
27			`#include <linux/init.h>`
28			`#include <linux/slab.h>`
29			`#include <linux/types.h>`
30			`#include <linux/sched.h>`
31			`#include <linux/timer.h>`
32			`#include <linux/errno.h>`
33			`#include <linux/ptrace.h>`
34			`#include <linux/ioport.h>`
35			`#include <linux/spinlock.h>`
36
37			`#include <linux/skbuff.h>`
38			`#include <linux/string.h>`
39			`#include <linux/serial.h>`
40			`#include <linux/serial_reg.h>`