/*
|
*
|
* Driver for the 3Com Bluetooth PCMCIA card
|
*
|
* 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
|
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
|
* 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
|
* <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
|
* are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
|
*
|
*/
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
#include <linux/init.h>
|
#include <linux/slab.h>
|
#include <linux/types.h>
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#include <linux/delay.h>
|
#include <linux/errno.h>
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#include <linux/ptrace.h>
|
#include <linux/ioport.h>
|
#include <linux/spinlock.h>
|
#include <linux/moduleparam.h>
|
|
#include <linux/skbuff.h>
|
#include <linux/string.h>
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#include <linux/serial.h>
|
#include <linux/serial_reg.h>
|
#include <linux/bitops.h>
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#include <asm/io.h>
|
|
#include <linux/device.h>
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#include <linux/firmware.h>
|
|
#include <pcmcia/cistpl.h>
|
#include <pcmcia/ciscode.h>
|
#include <pcmcia/ds.h>
|
#include <pcmcia/cisreg.h>
|
|
#include <net/bluetooth/bluetooth.h>
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#include <net/bluetooth/hci_core.h>
|
|
|
|
/* ======================== Module parameters ======================== */
|
|
|
MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
|
MODULE_DESCRIPTION("Bluetooth driver for the 3Com Bluetooth PCMCIA card");
|
MODULE_LICENSE("GPL");
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MODULE_FIRMWARE("BT3CPCC.bin");
|
|
|
|
/* ======================== Local structures ======================== */
|
|
|
struct bt3c_info {
|
struct pcmcia_device *p_dev;
|
|
struct hci_dev *hdev;
|
|
spinlock_t lock; /* For serializing operations */
|
|
struct sk_buff_head txq;
|
unsigned long tx_state;
|
|
unsigned long rx_state;
|
unsigned long rx_count;
|
struct sk_buff *rx_skb;
|
};
|
|
|
static int bt3c_config(struct pcmcia_device *link);
|
static void bt3c_release(struct pcmcia_device *link);
|
|
static void bt3c_detach(struct pcmcia_device *p_dev);
|
|
|
/* Transmit states */
|
#define XMIT_SENDING 1
|
#define XMIT_WAKEUP 2
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#define XMIT_WAITING 8
|
|
/* Receiver states */
|
#define RECV_WAIT_PACKET_TYPE 0
|
#define RECV_WAIT_EVENT_HEADER 1
|
#define RECV_WAIT_ACL_HEADER 2
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#define RECV_WAIT_SCO_HEADER 3
|
#define RECV_WAIT_DATA 4
|
|
|
|
/* ======================== Special I/O functions ======================== */
|
|
|
#define DATA_L 0
|
#define DATA_H 1
|
#define ADDR_L 2
|
#define ADDR_H 3
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#define CONTROL 4
|
|
|
static inline void bt3c_address(unsigned int iobase, unsigned short addr)
|
{
|
outb(addr & 0xff, iobase + ADDR_L);
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outb((addr >> 8) & 0xff, iobase + ADDR_H);
|
}
|
|
|
static inline void bt3c_put(unsigned int iobase, unsigned short value)
|
{
|
outb(value & 0xff, iobase + DATA_L);
|
outb((value >> 8) & 0xff, iobase + DATA_H);
|
}
|
|
|
static inline void bt3c_io_write(unsigned int iobase, unsigned short addr, unsigned short value)
|
{
|
bt3c_address(iobase, addr);
|
bt3c_put(iobase, value);
|
}
|
|
|
static inline unsigned short bt3c_get(unsigned int iobase)
|
{
|
unsigned short value = inb(iobase + DATA_L);
|
|
value |= inb(iobase + DATA_H) << 8;
|
|
return value;
|
}
|
|
|
static inline unsigned short bt3c_read(unsigned int iobase, unsigned short addr)
|
{
|
bt3c_address(iobase, addr);
|
|
return bt3c_get(iobase);
|
}
|
|
|
|
/* ======================== Interrupt handling ======================== */
|
|
|
static int bt3c_write(unsigned int iobase, int fifo_size, __u8 *buf, int len)
|
{
|
int actual = 0;
|
|
bt3c_address(iobase, 0x7080);
|
|
/* Fill FIFO with current frame */
|
while (actual < len) {
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/* Transmit next byte */
|
bt3c_put(iobase, buf[actual]);
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actual++;
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}
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|
bt3c_io_write(iobase, 0x7005, actual);
|
|
return actual;
|
}
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|
|
static void bt3c_write_wakeup(struct bt3c_info *info)
|
{
|
if (!info) {
|
BT_ERR("Unknown device");
|
return;
|
}
|
|
if (test_and_set_bit(XMIT_SENDING, &(info->tx_state)))
|
return;
|
|
do {
|
unsigned int iobase = info->p_dev->resource[0]->start;
|
register struct sk_buff *skb;
|
int len;
|
|
if (!pcmcia_dev_present(info->p_dev))
|
break;
|
|
skb = skb_dequeue(&(info->txq));
|
if (!skb) {
|
clear_bit(XMIT_SENDING, &(info->tx_state));
|
break;
|
}
|
|
/* Send frame */
|
len = bt3c_write(iobase, 256, skb->data, skb->len);
|
|
if (len != skb->len)
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BT_ERR("Very strange");
|
|
kfree_skb(skb);
|
|
info->hdev->stat.byte_tx += len;
|
|
} while (0);
|
}
|
|
|
static void bt3c_receive(struct bt3c_info *info)
|
{
|
unsigned int iobase;
|
int size = 0, avail;
|
|
if (!info) {
|
BT_ERR("Unknown device");
|
return;
|
}
|
|
iobase = info->p_dev->resource[0]->start;
|
|
avail = bt3c_read(iobase, 0x7006);
|
|
bt3c_address(iobase, 0x7480);
|
while (size < avail) {
|
size++;
|
info->hdev->stat.byte_rx++;
|
|
/* Allocate packet */
|
if (!info->rx_skb) {
|
info->rx_state = RECV_WAIT_PACKET_TYPE;
|
info->rx_count = 0;
|
info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC);
|
if (!info->rx_skb) {
|
BT_ERR("Can't allocate mem for new packet");
|
return;
|
}
|
}
|
|
|
if (info->rx_state == RECV_WAIT_PACKET_TYPE) {
|
|
hci_skb_pkt_type(info->rx_skb) = inb(iobase + DATA_L);
|
inb(iobase + DATA_H);
|
|
switch (hci_skb_pkt_type(info->rx_skb)) {
|
|
case HCI_EVENT_PKT:
|
info->rx_state = RECV_WAIT_EVENT_HEADER;
|
info->rx_count = HCI_EVENT_HDR_SIZE;
|
break;
|
|
case HCI_ACLDATA_PKT:
|
info->rx_state = RECV_WAIT_ACL_HEADER;
|
info->rx_count = HCI_ACL_HDR_SIZE;
|
break;
|
|
case HCI_SCODATA_PKT:
|
info->rx_state = RECV_WAIT_SCO_HEADER;
|
info->rx_count = HCI_SCO_HDR_SIZE;
|
break;
|
|
default:
|
/* Unknown packet */
|
BT_ERR("Unknown HCI packet with type 0x%02x received",
|
hci_skb_pkt_type(info->rx_skb));
|
info->hdev->stat.err_rx++;
|
|
kfree_skb(info->rx_skb);
|
info->rx_skb = NULL;
|
break;
|
|
}
|
|
} else {
|
|
__u8 x = inb(iobase + DATA_L);
|
|
skb_put_u8(info->rx_skb, x);
|
inb(iobase + DATA_H);
|
info->rx_count--;
|
|
if (info->rx_count == 0) {
|
|
int dlen;
|
struct hci_event_hdr *eh;
|
struct hci_acl_hdr *ah;
|
struct hci_sco_hdr *sh;
|
|
switch (info->rx_state) {
|
|
case RECV_WAIT_EVENT_HEADER:
|
eh = hci_event_hdr(info->rx_skb);
|
info->rx_state = RECV_WAIT_DATA;
|
info->rx_count = eh->plen;
|
break;
|
|
case RECV_WAIT_ACL_HEADER:
|
ah = hci_acl_hdr(info->rx_skb);
|
dlen = __le16_to_cpu(ah->dlen);
|
info->rx_state = RECV_WAIT_DATA;
|
info->rx_count = dlen;
|
break;
|
|
case RECV_WAIT_SCO_HEADER:
|
sh = hci_sco_hdr(info->rx_skb);
|
info->rx_state = RECV_WAIT_DATA;
|
info->rx_count = sh->dlen;
|
break;
|
|
case RECV_WAIT_DATA:
|
hci_recv_frame(info->hdev, info->rx_skb);
|
info->rx_skb = NULL;
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
bt3c_io_write(iobase, 0x7006, 0x0000);
|
}
|
|
|
static irqreturn_t bt3c_interrupt(int irq, void *dev_inst)
|
{
|
struct bt3c_info *info = dev_inst;
|
unsigned int iobase;
|
int iir;
|
irqreturn_t r = IRQ_NONE;
|
|
if (!info || !info->hdev)
|
/* our irq handler is shared */
|
return IRQ_NONE;
|
|
iobase = info->p_dev->resource[0]->start;
|
|
spin_lock(&(info->lock));
|
|
iir = inb(iobase + CONTROL);
|
if (iir & 0x80) {
|
int stat = bt3c_read(iobase, 0x7001);
|
|
if ((stat & 0xff) == 0x7f) {
|
BT_ERR("Very strange (stat=0x%04x)", stat);
|
} else if ((stat & 0xff) != 0xff) {
|
if (stat & 0x0020) {
|
int status = bt3c_read(iobase, 0x7002) & 0x10;
|
bt_dev_info(info->hdev, "Antenna %s",
|
status ? "out" : "in");
|
}
|
if (stat & 0x0001)
|
bt3c_receive(info);
|
if (stat & 0x0002) {
|
clear_bit(XMIT_SENDING, &(info->tx_state));
|
bt3c_write_wakeup(info);
|
}
|
|
bt3c_io_write(iobase, 0x7001, 0x0000);
|
|
outb(iir, iobase + CONTROL);
|
}
|
r = IRQ_HANDLED;
|
}
|
|
spin_unlock(&(info->lock));
|
|
return r;
|
}
|
|
|
|
/* ======================== HCI interface ======================== */
|
|
|
static int bt3c_hci_flush(struct hci_dev *hdev)
|
{
|
struct bt3c_info *info = hci_get_drvdata(hdev);
|
|
/* Drop TX queue */
|
skb_queue_purge(&(info->txq));
|
|
return 0;
|
}
|
|
|
static int bt3c_hci_open(struct hci_dev *hdev)
|
{
|
return 0;
|
}
|
|
|
static int bt3c_hci_close(struct hci_dev *hdev)
|
{
|
bt3c_hci_flush(hdev);
|
|
return 0;
|
}
|
|
|
static int bt3c_hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
|
{
|
struct bt3c_info *info = hci_get_drvdata(hdev);
|
unsigned long flags;
|
|
switch (hci_skb_pkt_type(skb)) {
|
case HCI_COMMAND_PKT:
|
hdev->stat.cmd_tx++;
|
break;
|
case HCI_ACLDATA_PKT:
|
hdev->stat.acl_tx++;
|
break;
|
case HCI_SCODATA_PKT:
|
hdev->stat.sco_tx++;
|
break;
|
}
|
|
/* Prepend skb with frame type */
|
memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1);
|
skb_queue_tail(&(info->txq), skb);
|
|
spin_lock_irqsave(&(info->lock), flags);
|
|
bt3c_write_wakeup(info);
|
|
spin_unlock_irqrestore(&(info->lock), flags);
|
|
return 0;
|
}
|
|
|
|
/* ======================== Card services HCI interaction ======================== */
|
|
|
static int bt3c_load_firmware(struct bt3c_info *info,
|
const unsigned char *firmware,
|
int count)
|
{
|
char *ptr = (char *) firmware;
|
char b[9];
|
unsigned int iobase, tmp, tn;
|
unsigned long size, addr, fcs;
|
int i, err = 0;
|
|
iobase = info->p_dev->resource[0]->start;
|
|
/* Reset */
|
bt3c_io_write(iobase, 0x8040, 0x0404);
|
bt3c_io_write(iobase, 0x8040, 0x0400);
|
|
udelay(1);
|
|
bt3c_io_write(iobase, 0x8040, 0x0404);
|
|
udelay(17);
|
|
/* Load */
|
while (count) {
|
if (ptr[0] != 'S') {
|
BT_ERR("Bad address in firmware");
|
err = -EFAULT;
|
goto error;
|
}
|
|
memset(b, 0, sizeof(b));
|
memcpy(b, ptr + 2, 2);
|
if (kstrtoul(b, 16, &size) < 0)
|
return -EINVAL;
|
|
memset(b, 0, sizeof(b));
|
memcpy(b, ptr + 4, 8);
|
if (kstrtoul(b, 16, &addr) < 0)
|
return -EINVAL;
|
|
memset(b, 0, sizeof(b));
|
memcpy(b, ptr + (size * 2) + 2, 2);
|
if (kstrtoul(b, 16, &fcs) < 0)
|
return -EINVAL;
|
|
memset(b, 0, sizeof(b));
|
for (tmp = 0, i = 0; i < size; i++) {
|
memcpy(b, ptr + (i * 2) + 2, 2);
|
if (kstrtouint(b, 16, &tn))
|
return -EINVAL;
|
tmp += tn;
|
}
|
|
if (((tmp + fcs) & 0xff) != 0xff) {
|
BT_ERR("Checksum error in firmware");
|
err = -EILSEQ;
|
goto error;
|
}
|
|
if (ptr[1] == '3') {
|
bt3c_address(iobase, addr);
|
|
memset(b, 0, sizeof(b));
|
for (i = 0; i < (size - 4) / 2; i++) {
|
memcpy(b, ptr + (i * 4) + 12, 4);
|
if (kstrtouint(b, 16, &tmp))
|
return -EINVAL;
|
bt3c_put(iobase, tmp);
|
}
|
}
|
|
ptr += (size * 2) + 6;
|
count -= (size * 2) + 6;
|
}
|
|
udelay(17);
|
|
/* Boot */
|
bt3c_address(iobase, 0x3000);
|
outb(inb(iobase + CONTROL) | 0x40, iobase + CONTROL);
|
|
error:
|
udelay(17);
|
|
/* Clear */
|
bt3c_io_write(iobase, 0x7006, 0x0000);
|
bt3c_io_write(iobase, 0x7005, 0x0000);
|
bt3c_io_write(iobase, 0x7001, 0x0000);
|
|
return err;
|
}
|
|
|
static int bt3c_open(struct bt3c_info *info)
|
{
|
const struct firmware *firmware;
|
struct hci_dev *hdev;
|
int err;
|
|
spin_lock_init(&(info->lock));
|
|
skb_queue_head_init(&(info->txq));
|
|
info->rx_state = RECV_WAIT_PACKET_TYPE;
|
info->rx_count = 0;
|
info->rx_skb = NULL;
|
|
/* Initialize HCI device */
|
hdev = hci_alloc_dev();
|
if (!hdev) {
|
BT_ERR("Can't allocate HCI device");
|
return -ENOMEM;
|
}
|
|
info->hdev = hdev;
|
|
hdev->bus = HCI_PCCARD;
|
hci_set_drvdata(hdev, 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;
|
|
/* 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(struct bt3c_info *info)
|
{
|
struct hci_dev *hdev = info->hdev;
|
|
if (!hdev)
|
return -ENODEV;
|
|
bt3c_hci_close(hdev);
|
|
hci_unregister_dev(hdev);
|
hci_free_dev(hdev);
|
|
return 0;
|
}
|
|
static int bt3c_probe(struct pcmcia_device *link)
|
{
|
struct bt3c_info *info;
|
|
/* Create new info device */
|
info = devm_kzalloc(&link->dev, sizeof(*info), GFP_KERNEL);
|
if (!info)
|
return -ENOMEM;
|
|
info->p_dev = link;
|
link->priv = info;
|
|
link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_VPP |
|
CONF_AUTO_SET_IO;
|
|
return bt3c_config(link);
|
}
|
|
|
static void bt3c_detach(struct pcmcia_device *link)
|
{
|
bt3c_release(link);
|
}
|
|
static int bt3c_check_config(struct pcmcia_device *p_dev, void *priv_data)
|
{
|
int *try = priv_data;
|
|
if (!try)
|
p_dev->io_lines = 16;
|
|
if ((p_dev->resource[0]->end != 8) || (p_dev->resource[0]->start == 0))
|
return -EINVAL;
|
|
p_dev->resource[0]->end = 8;
|
p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
|
p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
|
|
return pcmcia_request_io(p_dev);
|
}
|
|
static int bt3c_check_config_notpicky(struct pcmcia_device *p_dev,
|
void *priv_data)
|
{
|
static unsigned int base[5] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, 0x0 };
|
int j;
|
|
if (p_dev->io_lines > 3)
|
return -ENODEV;
|
|
p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
|
p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
|
p_dev->resource[0]->end = 8;
|
|
for (j = 0; j < 5; j++) {
|
p_dev->resource[0]->start = base[j];
|
p_dev->io_lines = base[j] ? 16 : 3;
|
if (!pcmcia_request_io(p_dev))
|
return 0;
|
}
|
return -ENODEV;
|
}
|
|
static int bt3c_config(struct pcmcia_device *link)
|
{
|
struct bt3c_info *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");
|
goto failed;
|
|
found_port:
|
i = pcmcia_request_irq(link, &bt3c_interrupt);
|
if (i != 0)
|
goto failed;
|
|
i = pcmcia_enable_device(link);
|
if (i != 0)
|
goto failed;
|
|
if (bt3c_open(info) != 0)
|
goto failed;
|
|
return 0;
|
|
failed:
|
bt3c_release(link);
|
return -ENODEV;
|
}
|
|
|
static void bt3c_release(struct pcmcia_device *link)
|
{
|
struct bt3c_info *info = link->priv;
|
|
bt3c_close(info);
|
|
pcmcia_disable_device(link);
|
}
|
|
|
static const 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,
|
.name = "bt3c_cs",
|
.probe = bt3c_probe,
|
.remove = bt3c_detach,
|
.id_table = bt3c_ids,
|
};
|
module_pcmcia_driver(bt3c_driver);
|
