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809 lines
16 KiB
809 lines
16 KiB
/*
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*
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* Driver for the 3Com Bluetooth PCMCIA card
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*
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* Copyright (C) 2001-2002 Marcel Holtmann <marcel@holtmann.org>
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* Jose Orlando Pereira <jop@di.uminho.pt>
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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 <linux/device.h>
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#include <linux/firmware.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 the 3Com Bluetooth PCMCIA card");
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MODULE_LICENSE("GPL");
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MODULE_FIRMWARE("BT3CPCC.bin");
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/* ======================== Local structures ======================== */
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typedef struct bt3c_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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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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} bt3c_info_t;
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static int bt3c_config(struct pcmcia_device *link);
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static void bt3c_release(struct pcmcia_device *link);
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static void bt3c_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_PACKET_TYPE 0
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#define RECV_WAIT_EVENT_HEADER 1
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#define RECV_WAIT_ACL_HEADER 2
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#define RECV_WAIT_SCO_HEADER 3
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#define RECV_WAIT_DATA 4
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/* ======================== Special I/O functions ======================== */
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#define DATA_L 0
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#define DATA_H 1
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#define ADDR_L 2
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#define ADDR_H 3
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#define CONTROL 4
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static inline void bt3c_address(unsigned int iobase, unsigned short addr)
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{
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outb(addr & 0xff, iobase + ADDR_L);
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outb((addr >> 8) & 0xff, iobase + ADDR_H);
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}
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static inline void bt3c_put(unsigned int iobase, unsigned short value)
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{
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outb(value & 0xff, iobase + DATA_L);
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outb((value >> 8) & 0xff, iobase + DATA_H);
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}
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static inline void bt3c_io_write(unsigned int iobase, unsigned short addr, unsigned short value)
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{
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bt3c_address(iobase, addr);
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bt3c_put(iobase, value);
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}
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static inline unsigned short bt3c_get(unsigned int iobase)
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{
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unsigned short value = inb(iobase + DATA_L);
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value |= inb(iobase + DATA_H) << 8;
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return value;
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}
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static inline unsigned short bt3c_read(unsigned int iobase, unsigned short addr)
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{
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bt3c_address(iobase, addr);
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return bt3c_get(iobase);
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}
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/* ======================== Interrupt handling ======================== */
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static int bt3c_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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bt3c_address(iobase, 0x7080);
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/* Fill FIFO with current frame */
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while (actual < len) {
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/* Transmit next byte */
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bt3c_put(iobase, buf[actual]);
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actual++;
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}
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bt3c_io_write(iobase, 0x7005, actual);
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return actual;
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}
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static void bt3c_write_wakeup(bt3c_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_and_set_bit(XMIT_SENDING, &(info->tx_state)))
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return;
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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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if (!pcmcia_dev_present(info->p_dev))
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break;
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if (!(skb = skb_dequeue(&(info->txq)))) {
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clear_bit(XMIT_SENDING, &(info->tx_state));
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break;
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}
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/* Send frame */
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len = bt3c_write(iobase, 256, skb->data, skb->len);
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if (len != skb->len) {
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BT_ERR("Very strange");
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}
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kfree_skb(skb);
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info->hdev->stat.byte_tx += len;
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} while (0);
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}
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static void bt3c_receive(bt3c_info_t *info)
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{
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unsigned int iobase;
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int size = 0, avail;
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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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avail = bt3c_read(iobase, 0x7006);
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//printk("bt3c_cs: receiving %d bytes\n", avail);
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bt3c_address(iobase, 0x7480);
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while (size < avail) {
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size++;
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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_state = RECV_WAIT_PACKET_TYPE;
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info->rx_count = 0;
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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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return;
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}
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}
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if (info->rx_state == RECV_WAIT_PACKET_TYPE) {
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info->rx_skb->dev = (void *) info->hdev;
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bt_cb(info->rx_skb)->pkt_type = inb(iobase + DATA_L);
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inb(iobase + DATA_H);
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//printk("bt3c: PACKET_TYPE=%02x\n", bt_cb(info->rx_skb)->pkt_type);
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switch (bt_cb(info->rx_skb)->pkt_type) {
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case HCI_EVENT_PKT:
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info->rx_state = RECV_WAIT_EVENT_HEADER;
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info->rx_count = HCI_EVENT_HDR_SIZE;
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break;
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case HCI_ACLDATA_PKT:
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info->rx_state = RECV_WAIT_ACL_HEADER;
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info->rx_count = HCI_ACL_HDR_SIZE;
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break;
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case HCI_SCODATA_PKT:
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info->rx_state = RECV_WAIT_SCO_HEADER;
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info->rx_count = HCI_SCO_HDR_SIZE;
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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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info->hdev->stat.err_rx++;
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clear_bit(HCI_RUNNING, &(info->hdev->flags));
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kfree_skb(info->rx_skb);
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info->rx_skb = NULL;
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break;
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}
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} else {
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__u8 x = inb(iobase + DATA_L);
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*skb_put(info->rx_skb, 1) = x;
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inb(iobase + DATA_H);
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info->rx_count--;
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if (info->rx_count == 0) {
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int dlen;
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struct hci_event_hdr *eh;
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struct hci_acl_hdr *ah;
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struct hci_sco_hdr *sh;
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switch (info->rx_state) {
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case RECV_WAIT_EVENT_HEADER:
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eh = hci_event_hdr(info->rx_skb);
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info->rx_state = RECV_WAIT_DATA;
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info->rx_count = eh->plen;
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break;
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case RECV_WAIT_ACL_HEADER:
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ah = hci_acl_hdr(info->rx_skb);
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dlen = __le16_to_cpu(ah->dlen);
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info->rx_state = RECV_WAIT_DATA;
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info->rx_count = dlen;
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break;
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case RECV_WAIT_SCO_HEADER:
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sh = hci_sco_hdr(info->rx_skb);
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info->rx_state = RECV_WAIT_DATA;
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info->rx_count = sh->dlen;
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break;
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case RECV_WAIT_DATA:
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hci_recv_frame(info->rx_skb);
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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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}
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}
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bt3c_io_write(iobase, 0x7006, 0x0000);
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}
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static irqreturn_t bt3c_interrupt(int irq, void *dev_inst)
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{
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bt3c_info_t *info = dev_inst;
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unsigned int iobase;
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int iir;
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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 + CONTROL);
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if (iir & 0x80) {
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int stat = bt3c_read(iobase, 0x7001);
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if ((stat & 0xff) == 0x7f) {
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BT_ERR("Very strange (stat=0x%04x)", stat);
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} else if ((stat & 0xff) != 0xff) {
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if (stat & 0x0020) {
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int stat = bt3c_read(iobase, 0x7002) & 0x10;
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BT_INFO("%s: Antenna %s", info->hdev->name,
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stat ? "out" : "in");
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}
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if (stat & 0x0001)
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bt3c_receive(info);
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if (stat & 0x0002) {
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//BT_ERR("Ack (stat=0x%04x)", stat);
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clear_bit(XMIT_SENDING, &(info->tx_state));
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bt3c_write_wakeup(info);
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}
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bt3c_io_write(iobase, 0x7001, 0x0000);
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outb(iir, iobase + CONTROL);
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}
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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 bt3c_hci_flush(struct hci_dev *hdev)
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{
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bt3c_info_t *info = (bt3c_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 bt3c_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 bt3c_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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bt3c_hci_flush(hdev);
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return 0;
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}
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static int bt3c_hci_send_frame(struct sk_buff *skb)
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{
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bt3c_info_t *info;
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struct hci_dev *hdev = (struct hci_dev *)(skb->dev);
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unsigned long flags;
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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 = (bt3c_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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break;
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case HCI_ACLDATA_PKT:
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hdev->stat.acl_tx++;
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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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break;
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};
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/* Prepend skb with frame type */
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memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
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skb_queue_tail(&(info->txq), skb);
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spin_lock_irqsave(&(info->lock), flags);
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bt3c_write_wakeup(info);
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spin_unlock_irqrestore(&(info->lock), flags);
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return 0;
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}
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static void bt3c_hci_destruct(struct hci_dev *hdev)
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{
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}
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static int bt3c_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 bt3c_load_firmware(bt3c_info_t *info, const unsigned char *firmware,
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int count)
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{
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char *ptr = (char *) firmware;
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char b[9];
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unsigned int iobase, size, addr, fcs, tmp;
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int i, err = 0;
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iobase = info->p_dev->io.BasePort1;
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/* Reset */
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bt3c_io_write(iobase, 0x8040, 0x0404);
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bt3c_io_write(iobase, 0x8040, 0x0400);
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udelay(1);
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bt3c_io_write(iobase, 0x8040, 0x0404);
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udelay(17);
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/* Load */
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while (count) {
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if (ptr[0] != 'S') {
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BT_ERR("Bad address in firmware");
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err = -EFAULT;
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goto error;
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}
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memset(b, 0, sizeof(b));
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memcpy(b, ptr + 2, 2);
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size = simple_strtol(b, NULL, 16);
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memset(b, 0, sizeof(b));
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memcpy(b, ptr + 4, 8);
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addr = simple_strtol(b, NULL, 16);
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memset(b, 0, sizeof(b));
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memcpy(b, ptr + (size * 2) + 2, 2);
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fcs = simple_strtol(b, NULL, 16);
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memset(b, 0, sizeof(b));
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for (tmp = 0, i = 0; i < size; i++) {
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memcpy(b, ptr + (i * 2) + 2, 2);
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tmp += simple_strtol(b, NULL, 16);
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}
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if (((tmp + fcs) & 0xff) != 0xff) {
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BT_ERR("Checksum error in firmware");
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err = -EILSEQ;
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goto error;
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}
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if (ptr[1] == '3') {
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bt3c_address(iobase, addr);
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memset(b, 0, sizeof(b));
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for (i = 0; i < (size - 4) / 2; i++) {
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memcpy(b, ptr + (i * 4) + 12, 4);
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tmp = simple_strtol(b, NULL, 16);
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bt3c_put(iobase, tmp);
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}
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}
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ptr += (size * 2) + 6;
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count -= (size * 2) + 6;
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}
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udelay(17);
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/* Boot */
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bt3c_address(iobase, 0x3000);
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outb(inb(iobase + CONTROL) | 0x40, iobase + CONTROL);
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error:
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udelay(17);
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/* Clear */
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bt3c_io_write(iobase, 0x7006, 0x0000);
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bt3c_io_write(iobase, 0x7005, 0x0000);
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bt3c_io_write(iobase, 0x7001, 0x0000);
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return err;
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}
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static int bt3c_open(bt3c_info_t *info)
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{
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const struct firmware *firmware;
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struct hci_dev *hdev;
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int err;
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spin_lock_init(&(info->lock));
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|
|
skb_queue_head_init(&(info->txq));
|
|
|
|
info->rx_state = RECV_WAIT_PACKET_TYPE;
|
|
info->rx_count = 0;
|
|
info->rx_skb = NULL;
|
|
|
|
/* Initialize HCI device */
|
|
hdev = hci_alloc_dev();
|
|
if (!hdev) {
|
|
BT_ERR("Can't allocate HCI device");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
info->hdev = hdev;
|
|
|
|
hdev->type = HCI_PCCARD;
|
|
hdev->driver_data = info;
|
|
SET_HCIDEV_DEV(hdev, &info->p_dev->dev);
|
|
|
|
hdev->open = bt3c_hci_open;
|
|
hdev->close = bt3c_hci_close;
|
|
hdev->flush = bt3c_hci_flush;
|
|
hdev->send = bt3c_hci_send_frame;
|
|
hdev->destruct = bt3c_hci_destruct;
|
|
hdev->ioctl = bt3c_hci_ioctl;
|
|
|
|
hdev->owner = THIS_MODULE;
|
|
|
|
/* Load firmware */
|
|
err = request_firmware(&firmware, "BT3CPCC.bin", &info->p_dev->dev);
|
|
if (err < 0) {
|
|
BT_ERR("Firmware request failed");
|
|
goto error;
|
|
}
|
|
|
|
err = bt3c_load_firmware(info, firmware->data, firmware->size);
|
|
|
|
release_firmware(firmware);
|
|
|
|
if (err < 0) {
|
|
BT_ERR("Firmware loading failed");
|
|
goto error;
|
|
}
|
|
|
|
/* Timeout before it is safe to send the first HCI packet */
|
|
msleep(1000);
|
|
|
|
/* Register HCI device */
|
|
err = hci_register_dev(hdev);
|
|
if (err < 0) {
|
|
BT_ERR("Can't register HCI device");
|
|
goto error;
|
|
}
|
|
|
|
return 0;
|
|
|
|
error:
|
|
info->hdev = NULL;
|
|
hci_free_dev(hdev);
|
|
return err;
|
|
}
|
|
|
|
|
|
static int bt3c_close(bt3c_info_t *info)
|
|
{
|
|
struct hci_dev *hdev = info->hdev;
|
|
|
|
if (!hdev)
|
|
return -ENODEV;
|
|
|
|
bt3c_hci_close(hdev);
|
|
|
|
if (hci_unregister_dev(hdev) < 0)
|
|
BT_ERR("Can't unregister HCI device %s", hdev->name);
|
|
|
|
hci_free_dev(hdev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int bt3c_probe(struct pcmcia_device *link)
|
|
{
|
|
bt3c_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 = bt3c_interrupt;
|
|
link->irq.Instance = info;
|
|
|
|
link->conf.Attributes = CONF_ENABLE_IRQ;
|
|
link->conf.IntType = INT_MEMORY_AND_IO;
|
|
|
|
return bt3c_config(link);
|
|
}
|
|
|
|
|
|
static void bt3c_detach(struct pcmcia_device *link)
|
|
{
|
|
bt3c_info_t *info = link->priv;
|
|
|
|
bt3c_release(link);
|
|
kfree(info);
|
|
}
|
|
|
|
static int bt3c_check_config(struct pcmcia_device *p_dev,
|
|
cistpl_cftable_entry_t *cf,
|
|
cistpl_cftable_entry_t *dflt,
|
|
unsigned int vcc,
|
|
void *priv_data)
|
|
{
|
|
unsigned long try = (unsigned long) priv_data;
|
|
|
|
if (cf->vpp1.present & (1 << CISTPL_POWER_VNOM))
|
|
p_dev->conf.Vpp = cf->vpp1.param[CISTPL_POWER_VNOM] / 10000;
|
|
if ((cf->io.nwin > 0) && (cf->io.win[0].len == 8) &&
|
|
(cf->io.win[0].base != 0)) {
|
|
p_dev->io.BasePort1 = cf->io.win[0].base;
|
|
p_dev->io.IOAddrLines = (try == 0) ? 16 :
|
|
cf->io.flags & CISTPL_IO_LINES_MASK;
|
|
if (!pcmcia_request_io(p_dev, &p_dev->io))
|
|
return 0;
|
|
}
|
|
return -ENODEV;
|
|
}
|
|
|
|
static int bt3c_check_config_notpicky(struct pcmcia_device *p_dev,
|
|
cistpl_cftable_entry_t *cf,
|
|
cistpl_cftable_entry_t *dflt,
|
|
unsigned int vcc,
|
|
void *priv_data)
|
|
{
|
|
static unsigned int base[5] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, 0x0 };
|
|
int j;
|
|
|
|
if ((cf->io.nwin > 0) && ((cf->io.flags & CISTPL_IO_LINES_MASK) <= 3)) {
|
|
for (j = 0; j < 5; j++) {
|
|
p_dev->io.BasePort1 = base[j];
|
|
p_dev->io.IOAddrLines = base[j] ? 16 : 3;
|
|
if (!pcmcia_request_io(p_dev, &p_dev->io))
|
|
return 0;
|
|
}
|
|
}
|
|
return -ENODEV;
|
|
}
|
|
|
|
static int bt3c_config(struct pcmcia_device *link)
|
|
{
|
|
bt3c_info_t *info = link->priv;
|
|
int i;
|
|
unsigned long try;
|
|
|
|
/* First pass: look for a config entry that looks normal.
|
|
Two tries: without IO aliases, then with aliases */
|
|
for (try = 0; try < 2; try++)
|
|
if (!pcmcia_loop_config(link, bt3c_check_config, (void *) try))
|
|
goto found_port;
|
|
|
|
/* 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. */
|
|
if (!pcmcia_loop_config(link, bt3c_check_config_notpicky, NULL))
|
|
goto found_port;
|
|
|
|
BT_ERR("No usable port range found");
|
|
cs_error(link, RequestIO, -ENODEV);
|
|
goto failed;
|
|
|
|
found_port:
|
|
i = pcmcia_request_irq(link, &link->irq);
|
|
if (i != 0) {
|
|
cs_error(link, RequestIRQ, i);
|
|
link->irq.AssignedIRQ = 0;
|
|
}
|
|
|
|
i = pcmcia_request_configuration(link, &link->conf);
|
|
if (i != 0) {
|
|
cs_error(link, RequestConfiguration, i);
|
|
goto failed;
|
|
}
|
|
|
|
if (bt3c_open(info) != 0)
|
|
goto failed;
|
|
|
|
strcpy(info->node.dev_name, info->hdev->name);
|
|
link->dev_node = &info->node;
|
|
|
|
return 0;
|
|
|
|
failed:
|
|
bt3c_release(link);
|
|
return -ENODEV;
|
|
}
|
|
|
|
|
|
static void bt3c_release(struct pcmcia_device *link)
|
|
{
|
|
bt3c_info_t *info = link->priv;
|
|
|
|
bt3c_close(info);
|
|
|
|
pcmcia_disable_device(link);
|
|
}
|
|
|
|
|
|
static struct pcmcia_device_id bt3c_ids[] = {
|
|
PCMCIA_DEVICE_PROD_ID13("3COM", "Bluetooth PC Card", 0xefce0a31, 0xd4ce9b02),
|
|
PCMCIA_DEVICE_NULL
|
|
};
|
|
MODULE_DEVICE_TABLE(pcmcia, bt3c_ids);
|
|
|
|
static struct pcmcia_driver bt3c_driver = {
|
|
.owner = THIS_MODULE,
|
|
.drv = {
|
|
.name = "bt3c_cs",
|
|
},
|
|
.probe = bt3c_probe,
|
|
.remove = bt3c_detach,
|
|
.id_table = bt3c_ids,
|
|
};
|
|
|
|
static int __init init_bt3c_cs(void)
|
|
{
|
|
return pcmcia_register_driver(&bt3c_driver);
|
|
}
|
|
|
|
|
|
static void __exit exit_bt3c_cs(void)
|
|
{
|
|
pcmcia_unregister_driver(&bt3c_driver);
|
|
}
|
|
|
|
module_init(init_bt3c_cs);
|
|
module_exit(exit_bt3c_cs);
|
|
|