615 lines
12 KiB
C
615 lines
12 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/io.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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struct dtl1_info {
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struct pcmcia_device *p_dev;
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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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};
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static int dtl1_config(struct pcmcia_device *link);
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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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struct nsh {
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u8 type;
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u8 zero;
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u16 len;
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} __packed; /* 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(struct dtl1_info *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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unsigned int iobase = info->p_dev->resource[0]->start;
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register struct sk_buff *skb;
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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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skb = skb_dequeue(&(info->txq));
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if (!skb)
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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(struct dtl1_info *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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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(struct dtl1_info *info)
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{
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unsigned int iobase;
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struct nsh *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->resource[0]->start;
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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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info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC);
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if (!info->rx_skb) {
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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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}
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skb_put_u8(info->rx_skb, inb(iobase + UART_RX));
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nsh = (struct nsh *)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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hci_skb_pkt_type(info->rx_skb) = 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 (hci_skb_pkt_type(info->rx_skb)) {
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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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hci_skb_pkt_type(info->rx_skb) &= 0x0f;
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hci_recv_frame(info->hdev, 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",
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hci_skb_pkt_type(info->rx_skb));
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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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struct dtl1_info *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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irqreturn_t r = IRQ_NONE;
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if (!info || !info->hdev)
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/* our irq handler is shared */
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return IRQ_NONE;
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iobase = info->p_dev->resource[0]->start;
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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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r = IRQ_HANDLED;
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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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r = IRQ_HANDLED;
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}
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spin_unlock(&(info->lock));
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return r;
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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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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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struct dtl1_info *info = hci_get_drvdata(hdev);
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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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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 hci_dev *hdev, struct sk_buff *skb)
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{
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struct dtl1_info *info = hci_get_drvdata(hdev);
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struct sk_buff *s;
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struct nsh nsh;
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switch (hci_skb_pkt_type(skb)) {
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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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default:
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return -EILSEQ;
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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_u8(s, 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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/* ======================== Card services HCI interaction ======================== */
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static int dtl1_open(struct dtl1_info *info)
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{
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unsigned long flags;
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unsigned int iobase = info->p_dev->resource[0]->start;
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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->bus = HCI_PCCARD;
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hci_set_drvdata(hdev, 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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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->resource[0]->start + UART_MSR)
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& 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(struct dtl1_info *info)
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{
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unsigned long flags;
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unsigned int iobase = info->p_dev->resource[0]->start;
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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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hci_unregister_dev(hdev);
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hci_free_dev(hdev);
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return 0;
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}
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static int dtl1_probe(struct pcmcia_device *link)
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{
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struct dtl1_info *info;
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/* Create new info device */
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info = devm_kzalloc(&link->dev, sizeof(*info), GFP_KERNEL);
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if (!info)
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return -ENOMEM;
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info->p_dev = link;
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link->priv = info;
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link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
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return dtl1_config(link);
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}
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static void dtl1_detach(struct pcmcia_device *link)
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{
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struct dtl1_info *info = link->priv;
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dtl1_close(info);
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pcmcia_disable_device(link);
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}
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static int dtl1_confcheck(struct pcmcia_device *p_dev, void *priv_data)
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{
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if ((p_dev->resource[1]->end) || (p_dev->resource[1]->end < 8))
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return -ENODEV;
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p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
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p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
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return pcmcia_request_io(p_dev);
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}
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static int dtl1_config(struct pcmcia_device *link)
|
|
{
|
|
struct dtl1_info *info = link->priv;
|
|
int ret;
|
|
|
|
/* Look for a generic full-sized window */
|
|
link->resource[0]->end = 8;
|
|
ret = pcmcia_loop_config(link, dtl1_confcheck, NULL);
|
|
if (ret)
|
|
goto failed;
|
|
|
|
ret = pcmcia_request_irq(link, dtl1_interrupt);
|
|
if (ret)
|
|
goto failed;
|
|
|
|
ret = pcmcia_enable_device(link);
|
|
if (ret)
|
|
goto failed;
|
|
|
|
ret = dtl1_open(info);
|
|
if (ret)
|
|
goto failed;
|
|
|
|
return 0;
|
|
|
|
failed:
|
|
dtl1_detach(link);
|
|
return ret;
|
|
}
|
|
|
|
static const 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,
|
|
.name = "dtl1_cs",
|
|
.probe = dtl1_probe,
|
|
.remove = dtl1_detach,
|
|
.id_table = dtl1_ids,
|
|
};
|
|
module_pcmcia_driver(dtl1_driver);
|