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![Jeff Garzik](/assets/img/avatar_default.png)
Our info structure and info->hdev is always passed to the IRQ handler, so we don't have to worry about these checks in every interrupt. Leave a BUG_ON() just to help unwary programmers, but these could probably be removed as well. Signed-off-by: Jeff Garzik <jgarzik@redhat.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
721 lines
15 KiB
C
721 lines
15 KiB
C
/*
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*
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* A driver for Nokia Connectivity Card DTL-1 devices
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*
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* Copyright (C) 2001-2002 Marcel Holtmann <marcel@holtmann.org>
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation;
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The initial developer of the original code is David A. Hinds
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* <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
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* are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
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*
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/types.h>
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#include <linux/delay.h>
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#include <linux/errno.h>
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#include <linux/ptrace.h>
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#include <linux/ioport.h>
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#include <linux/spinlock.h>
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#include <linux/moduleparam.h>
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#include <linux/skbuff.h>
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#include <linux/string.h>
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#include <linux/serial.h>
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#include <linux/serial_reg.h>
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#include <linux/bitops.h>
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#include <asm/system.h>
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#include <asm/io.h>
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#include <pcmcia/cs_types.h>
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#include <pcmcia/cs.h>
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#include <pcmcia/cistpl.h>
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#include <pcmcia/ciscode.h>
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#include <pcmcia/ds.h>
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#include <pcmcia/cisreg.h>
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#include <net/bluetooth/bluetooth.h>
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#include <net/bluetooth/hci_core.h>
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/* ======================== Module parameters ======================== */
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MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
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MODULE_DESCRIPTION("Bluetooth driver for Nokia Connectivity Card DTL-1");
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MODULE_LICENSE("GPL");
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/* ======================== Local structures ======================== */
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typedef struct dtl1_info_t {
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struct pcmcia_device *p_dev;
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dev_node_t node;
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struct hci_dev *hdev;
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spinlock_t lock; /* For serializing operations */
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unsigned long flowmask; /* HCI flow mask */
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int ri_latch;
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struct sk_buff_head txq;
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unsigned long tx_state;
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unsigned long rx_state;
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unsigned long rx_count;
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struct sk_buff *rx_skb;
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} dtl1_info_t;
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static int dtl1_config(struct pcmcia_device *link);
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static void dtl1_release(struct pcmcia_device *link);
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static void dtl1_detach(struct pcmcia_device *p_dev);
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/* Transmit states */
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#define XMIT_SENDING 1
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#define XMIT_WAKEUP 2
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#define XMIT_WAITING 8
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/* Receiver States */
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#define RECV_WAIT_NSH 0
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#define RECV_WAIT_DATA 1
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typedef struct {
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u8 type;
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u8 zero;
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u16 len;
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} __attribute__ ((packed)) nsh_t; /* Nokia Specific Header */
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#define NSHL 4 /* Nokia Specific Header Length */
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/* ======================== Interrupt handling ======================== */
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static int dtl1_write(unsigned int iobase, int fifo_size, __u8 *buf, int len)
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{
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int actual = 0;
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/* Tx FIFO should be empty */
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if (!(inb(iobase + UART_LSR) & UART_LSR_THRE))
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return 0;
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/* Fill FIFO with current frame */
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while ((fifo_size-- > 0) && (actual < len)) {
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/* Transmit next byte */
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outb(buf[actual], iobase + UART_TX);
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actual++;
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}
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return actual;
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}
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static void dtl1_write_wakeup(dtl1_info_t *info)
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{
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if (!info) {
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BT_ERR("Unknown device");
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return;
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}
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if (test_bit(XMIT_WAITING, &(info->tx_state))) {
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set_bit(XMIT_WAKEUP, &(info->tx_state));
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return;
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}
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if (test_and_set_bit(XMIT_SENDING, &(info->tx_state))) {
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set_bit(XMIT_WAKEUP, &(info->tx_state));
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return;
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}
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do {
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register unsigned int iobase = info->p_dev->io.BasePort1;
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register struct sk_buff *skb;
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register int len;
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clear_bit(XMIT_WAKEUP, &(info->tx_state));
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if (!pcmcia_dev_present(info->p_dev))
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return;
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if (!(skb = skb_dequeue(&(info->txq))))
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break;
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/* Send frame */
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len = dtl1_write(iobase, 32, skb->data, skb->len);
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if (len == skb->len) {
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set_bit(XMIT_WAITING, &(info->tx_state));
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kfree_skb(skb);
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} else {
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skb_pull(skb, len);
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skb_queue_head(&(info->txq), skb);
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}
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info->hdev->stat.byte_tx += len;
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} while (test_bit(XMIT_WAKEUP, &(info->tx_state)));
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clear_bit(XMIT_SENDING, &(info->tx_state));
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}
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static void dtl1_control(dtl1_info_t *info, struct sk_buff *skb)
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{
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u8 flowmask = *(u8 *)skb->data;
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int i;
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printk(KERN_INFO "Bluetooth: Nokia control data =");
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for (i = 0; i < skb->len; i++) {
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printk(" %02x", skb->data[i]);
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}
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printk("\n");
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/* transition to active state */
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if (((info->flowmask & 0x07) == 0) && ((flowmask & 0x07) != 0)) {
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clear_bit(XMIT_WAITING, &(info->tx_state));
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dtl1_write_wakeup(info);
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}
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info->flowmask = flowmask;
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kfree_skb(skb);
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}
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static void dtl1_receive(dtl1_info_t *info)
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{
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unsigned int iobase;
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nsh_t *nsh;
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int boguscount = 0;
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if (!info) {
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BT_ERR("Unknown device");
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return;
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}
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iobase = info->p_dev->io.BasePort1;
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do {
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info->hdev->stat.byte_rx++;
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/* Allocate packet */
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if (info->rx_skb == NULL)
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if (!(info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) {
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BT_ERR("Can't allocate mem for new packet");
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info->rx_state = RECV_WAIT_NSH;
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info->rx_count = NSHL;
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return;
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}
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*skb_put(info->rx_skb, 1) = inb(iobase + UART_RX);
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nsh = (nsh_t *)info->rx_skb->data;
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info->rx_count--;
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if (info->rx_count == 0) {
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switch (info->rx_state) {
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case RECV_WAIT_NSH:
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info->rx_state = RECV_WAIT_DATA;
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info->rx_count = nsh->len + (nsh->len & 0x0001);
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break;
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case RECV_WAIT_DATA:
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bt_cb(info->rx_skb)->pkt_type = nsh->type;
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/* remove PAD byte if it exists */
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if (nsh->len & 0x0001) {
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info->rx_skb->tail--;
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info->rx_skb->len--;
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}
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/* remove NSH */
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skb_pull(info->rx_skb, NSHL);
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switch (bt_cb(info->rx_skb)->pkt_type) {
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case 0x80:
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/* control data for the Nokia Card */
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dtl1_control(info, info->rx_skb);
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break;
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case 0x82:
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case 0x83:
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case 0x84:
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/* send frame to the HCI layer */
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info->rx_skb->dev = (void *) info->hdev;
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bt_cb(info->rx_skb)->pkt_type &= 0x0f;
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hci_recv_frame(info->rx_skb);
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break;
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default:
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/* unknown packet */
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BT_ERR("Unknown HCI packet with type 0x%02x received", bt_cb(info->rx_skb)->pkt_type);
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kfree_skb(info->rx_skb);
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break;
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}
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info->rx_state = RECV_WAIT_NSH;
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info->rx_count = NSHL;
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info->rx_skb = NULL;
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break;
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}
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}
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/* Make sure we don't stay here too long */
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if (boguscount++ > 32)
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break;
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} while (inb(iobase + UART_LSR) & UART_LSR_DR);
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}
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static irqreturn_t dtl1_interrupt(int irq, void *dev_inst)
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{
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dtl1_info_t *info = dev_inst;
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unsigned int iobase;
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unsigned char msr;
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int boguscount = 0;
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int iir, lsr;
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BUG_ON(!info->hdev);
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iobase = info->p_dev->io.BasePort1;
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spin_lock(&(info->lock));
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iir = inb(iobase + UART_IIR) & UART_IIR_ID;
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while (iir) {
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/* Clear interrupt */
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lsr = inb(iobase + UART_LSR);
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switch (iir) {
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case UART_IIR_RLSI:
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BT_ERR("RLSI");
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break;
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case UART_IIR_RDI:
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/* Receive interrupt */
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dtl1_receive(info);
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break;
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case UART_IIR_THRI:
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if (lsr & UART_LSR_THRE) {
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/* Transmitter ready for data */
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dtl1_write_wakeup(info);
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}
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break;
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default:
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BT_ERR("Unhandled IIR=%#x", iir);
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break;
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}
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/* Make sure we don't stay here too long */
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if (boguscount++ > 100)
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break;
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iir = inb(iobase + UART_IIR) & UART_IIR_ID;
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}
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msr = inb(iobase + UART_MSR);
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if (info->ri_latch ^ (msr & UART_MSR_RI)) {
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info->ri_latch = msr & UART_MSR_RI;
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clear_bit(XMIT_WAITING, &(info->tx_state));
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dtl1_write_wakeup(info);
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}
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spin_unlock(&(info->lock));
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return IRQ_HANDLED;
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}
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/* ======================== HCI interface ======================== */
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static int dtl1_hci_open(struct hci_dev *hdev)
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{
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set_bit(HCI_RUNNING, &(hdev->flags));
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return 0;
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}
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static int dtl1_hci_flush(struct hci_dev *hdev)
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{
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dtl1_info_t *info = (dtl1_info_t *)(hdev->driver_data);
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/* Drop TX queue */
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skb_queue_purge(&(info->txq));
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return 0;
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}
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static int dtl1_hci_close(struct hci_dev *hdev)
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{
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if (!test_and_clear_bit(HCI_RUNNING, &(hdev->flags)))
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return 0;
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dtl1_hci_flush(hdev);
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return 0;
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}
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static int dtl1_hci_send_frame(struct sk_buff *skb)
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{
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dtl1_info_t *info;
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struct hci_dev *hdev = (struct hci_dev *)(skb->dev);
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struct sk_buff *s;
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nsh_t nsh;
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if (!hdev) {
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BT_ERR("Frame for unknown HCI device (hdev=NULL)");
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return -ENODEV;
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}
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info = (dtl1_info_t *)(hdev->driver_data);
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switch (bt_cb(skb)->pkt_type) {
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case HCI_COMMAND_PKT:
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hdev->stat.cmd_tx++;
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nsh.type = 0x81;
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break;
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case HCI_ACLDATA_PKT:
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hdev->stat.acl_tx++;
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nsh.type = 0x82;
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break;
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case HCI_SCODATA_PKT:
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hdev->stat.sco_tx++;
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nsh.type = 0x83;
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break;
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};
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nsh.zero = 0;
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nsh.len = skb->len;
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s = bt_skb_alloc(NSHL + skb->len + 1, GFP_ATOMIC);
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if (!s)
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return -ENOMEM;
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skb_reserve(s, NSHL);
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skb_copy_from_linear_data(skb, skb_put(s, skb->len), skb->len);
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if (skb->len & 0x0001)
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*skb_put(s, 1) = 0; /* PAD */
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/* Prepend skb with Nokia frame header and queue */
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memcpy(skb_push(s, NSHL), &nsh, NSHL);
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skb_queue_tail(&(info->txq), s);
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dtl1_write_wakeup(info);
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kfree_skb(skb);
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return 0;
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}
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static void dtl1_hci_destruct(struct hci_dev *hdev)
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{
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}
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static int dtl1_hci_ioctl(struct hci_dev *hdev, unsigned int cmd, unsigned long arg)
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{
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return -ENOIOCTLCMD;
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}
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/* ======================== Card services HCI interaction ======================== */
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static int dtl1_open(dtl1_info_t *info)
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{
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unsigned long flags;
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unsigned int iobase = info->p_dev->io.BasePort1;
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struct hci_dev *hdev;
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spin_lock_init(&(info->lock));
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skb_queue_head_init(&(info->txq));
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info->rx_state = RECV_WAIT_NSH;
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info->rx_count = NSHL;
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info->rx_skb = NULL;
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set_bit(XMIT_WAITING, &(info->tx_state));
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/* Initialize HCI device */
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hdev = hci_alloc_dev();
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if (!hdev) {
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BT_ERR("Can't allocate HCI device");
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return -ENOMEM;
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}
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info->hdev = hdev;
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hdev->type = HCI_PCCARD;
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hdev->driver_data = info;
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SET_HCIDEV_DEV(hdev, &info->p_dev->dev);
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hdev->open = dtl1_hci_open;
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hdev->close = dtl1_hci_close;
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hdev->flush = dtl1_hci_flush;
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hdev->send = dtl1_hci_send_frame;
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hdev->destruct = dtl1_hci_destruct;
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hdev->ioctl = dtl1_hci_ioctl;
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hdev->owner = THIS_MODULE;
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spin_lock_irqsave(&(info->lock), flags);
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/* Reset UART */
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outb(0, iobase + UART_MCR);
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/* Turn off interrupts */
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outb(0, iobase + UART_IER);
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/* Initialize UART */
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outb(UART_LCR_WLEN8, iobase + UART_LCR); /* Reset DLAB */
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outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase + UART_MCR);
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info->ri_latch = inb(info->p_dev->io.BasePort1 + UART_MSR) & UART_MSR_RI;
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/* Turn on interrupts */
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outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER);
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spin_unlock_irqrestore(&(info->lock), flags);
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/* Timeout before it is safe to send the first HCI packet */
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msleep(2000);
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/* Register HCI device */
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if (hci_register_dev(hdev) < 0) {
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BT_ERR("Can't register HCI device");
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info->hdev = NULL;
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hci_free_dev(hdev);
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return -ENODEV;
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}
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return 0;
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}
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static int dtl1_close(dtl1_info_t *info)
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{
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unsigned long flags;
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unsigned int iobase = info->p_dev->io.BasePort1;
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struct hci_dev *hdev = info->hdev;
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if (!hdev)
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return -ENODEV;
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dtl1_hci_close(hdev);
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spin_lock_irqsave(&(info->lock), flags);
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/* Reset UART */
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outb(0, iobase + UART_MCR);
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/* Turn off interrupts */
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outb(0, iobase + UART_IER);
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spin_unlock_irqrestore(&(info->lock), flags);
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|
if (hci_unregister_dev(hdev) < 0)
|
|
BT_ERR("Can't unregister HCI device %s", hdev->name);
|
|
|
|
hci_free_dev(hdev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dtl1_probe(struct pcmcia_device *link)
|
|
{
|
|
dtl1_info_t *info;
|
|
|
|
/* Create new info device */
|
|
info = kzalloc(sizeof(*info), GFP_KERNEL);
|
|
if (!info)
|
|
return -ENOMEM;
|
|
|
|
info->p_dev = 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 = dtl1_interrupt;
|
|
link->irq.Instance = info;
|
|
|
|
link->conf.Attributes = CONF_ENABLE_IRQ;
|
|
link->conf.IntType = INT_MEMORY_AND_IO;
|
|
|
|
return dtl1_config(link);
|
|
}
|
|
|
|
|
|
static void dtl1_detach(struct pcmcia_device *link)
|
|
{
|
|
dtl1_info_t *info = link->priv;
|
|
|
|
dtl1_release(link);
|
|
|
|
kfree(info);
|
|
}
|
|
|
|
static int get_tuple(struct pcmcia_device *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(struct pcmcia_device *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(struct pcmcia_device *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 int dtl1_config(struct pcmcia_device *link)
|
|
{
|
|
dtl1_info_t *info = link->priv;
|
|
tuple_t tuple;
|
|
u_short buf[256];
|
|
cisparse_t parse;
|
|
cistpl_cftable_entry_t *cf = &parse.cftable_entry;
|
|
int i;
|
|
|
|
tuple.TupleData = (cisdata_t *)buf;
|
|
tuple.TupleOffset = 0;
|
|
tuple.TupleDataMax = 255;
|
|
tuple.Attributes = 0;
|
|
tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
|
|
|
|
/* Look for a generic full-sized window */
|
|
link->io.NumPorts1 = 8;
|
|
i = first_tuple(link, &tuple, &parse);
|
|
while (i != CS_NO_MORE_ITEMS) {
|
|
if ((i == CS_SUCCESS) && (cf->io.nwin == 1) && (cf->io.win[0].len > 8)) {
|
|
link->conf.ConfigIndex = cf->index;
|
|
link->io.BasePort1 = cf->io.win[0].base;
|
|
link->io.NumPorts1 = cf->io.win[0].len; /*yo */
|
|
link->io.IOAddrLines = cf->io.flags & CISTPL_IO_LINES_MASK;
|
|
i = pcmcia_request_io(link, &link->io);
|
|
if (i == CS_SUCCESS)
|
|
break;
|
|
}
|
|
i = next_tuple(link, &tuple, &parse);
|
|
}
|
|
|
|
if (i != CS_SUCCESS) {
|
|
cs_error(link, RequestIO, i);
|
|
goto failed;
|
|
}
|
|
|
|
i = pcmcia_request_irq(link, &link->irq);
|
|
if (i != CS_SUCCESS) {
|
|
cs_error(link, RequestIRQ, i);
|
|
link->irq.AssignedIRQ = 0;
|
|
}
|
|
|
|
i = pcmcia_request_configuration(link, &link->conf);
|
|
if (i != CS_SUCCESS) {
|
|
cs_error(link, RequestConfiguration, i);
|
|
goto failed;
|
|
}
|
|
|
|
if (dtl1_open(info) != 0)
|
|
goto failed;
|
|
|
|
strcpy(info->node.dev_name, info->hdev->name);
|
|
link->dev_node = &info->node;
|
|
|
|
return 0;
|
|
|
|
failed:
|
|
dtl1_release(link);
|
|
return -ENODEV;
|
|
}
|
|
|
|
|
|
static void dtl1_release(struct pcmcia_device *link)
|
|
{
|
|
dtl1_info_t *info = link->priv;
|
|
|
|
dtl1_close(info);
|
|
|
|
pcmcia_disable_device(link);
|
|
}
|
|
|
|
|
|
static struct pcmcia_device_id dtl1_ids[] = {
|
|
PCMCIA_DEVICE_PROD_ID12("Nokia Mobile Phones", "DTL-1", 0xe1bfdd64, 0xe168480d),
|
|
PCMCIA_DEVICE_PROD_ID12("Nokia Mobile Phones", "DTL-4", 0xe1bfdd64, 0x9102bc82),
|
|
PCMCIA_DEVICE_PROD_ID12("Socket", "CF", 0xb38bcc2e, 0x44ebf863),
|
|
PCMCIA_DEVICE_PROD_ID12("Socket", "CF+ Personal Network Card", 0xb38bcc2e, 0xe732bae3),
|
|
PCMCIA_DEVICE_NULL
|
|
};
|
|
MODULE_DEVICE_TABLE(pcmcia, dtl1_ids);
|
|
|
|
static struct pcmcia_driver dtl1_driver = {
|
|
.owner = THIS_MODULE,
|
|
.drv = {
|
|
.name = "dtl1_cs",
|
|
},
|
|
.probe = dtl1_probe,
|
|
.remove = dtl1_detach,
|
|
.id_table = dtl1_ids,
|
|
};
|
|
|
|
static int __init init_dtl1_cs(void)
|
|
{
|
|
return pcmcia_register_driver(&dtl1_driver);
|
|
}
|
|
|
|
|
|
static void __exit exit_dtl1_cs(void)
|
|
{
|
|
pcmcia_unregister_driver(&dtl1_driver);
|
|
}
|
|
|
|
module_init(init_dtl1_cs);
|
|
module_exit(exit_dtl1_cs);
|