forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
749 lines
15 KiB
749 lines
15 KiB
/* |
|
* |
|
* Driver for the 3Com Bluetooth PCMCIA card |
|
* |
|
* Copyright (C) 2001-2002 Marcel Holtmann <[email protected]> |
|
* Jose Orlando Pereira <[email protected]> |
|
* |
|
* |
|
* This program is free software; you can redistribute it and/or modify |
|
* it under the terms of the GNU General Public License version 2 as |
|
* published by the Free Software Foundation; |
|
* |
|
* Software distributed under the License is distributed on an "AS |
|
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or |
|
* implied. See the License for the specific language governing |
|
* rights and limitations under the License. |
|
* |
|
* The initial developer of the original code is David A. Hinds |
|
* <[email protected]>. 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> |
|
#include <linux/delay.h> |
|
#include <linux/errno.h> |
|
#include <linux/ptrace.h> |
|
#include <linux/ioport.h> |
|
#include <linux/spinlock.h> |
|
#include <linux/moduleparam.h> |
|
|
|
#include <linux/skbuff.h> |
|
#include <linux/string.h> |
|
#include <linux/serial.h> |
|
#include <linux/serial_reg.h> |
|
#include <linux/bitops.h> |
|
#include <asm/io.h> |
|
|
|
#include <linux/device.h> |
|
#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> |
|
#include <net/bluetooth/hci_core.h> |
|
|
|
|
|
|
|
/* ======================== Module parameters ======================== */ |
|
|
|
|
|
MODULE_AUTHOR("Marcel Holtmann <[email protected]>"); |
|
MODULE_DESCRIPTION("Bluetooth driver for the 3Com Bluetooth PCMCIA card"); |
|
MODULE_LICENSE("GPL"); |
|
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 |
|
#define XMIT_WAITING 8 |
|
|
|
/* Receiver states */ |
|
#define RECV_WAIT_PACKET_TYPE 0 |
|
#define RECV_WAIT_EVENT_HEADER 1 |
|
#define RECV_WAIT_ACL_HEADER 2 |
|
#define RECV_WAIT_SCO_HEADER 3 |
|
#define RECV_WAIT_DATA 4 |
|
|
|
|
|
|
|
/* ======================== Special I/O functions ======================== */ |
|
|
|
|
|
#define DATA_L 0 |
|
#define DATA_H 1 |
|
#define ADDR_L 2 |
|
#define ADDR_H 3 |
|
#define CONTROL 4 |
|
|
|
|
|
static inline void bt3c_address(unsigned int iobase, unsigned short addr) |
|
{ |
|
outb(addr & 0xff, iobase + ADDR_L); |
|
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) { |
|
/* Transmit next byte */ |
|
bt3c_put(iobase, buf[actual]); |
|
actual++; |
|
} |
|
|
|
bt3c_io_write(iobase, 0x7005, actual); |
|
|
|
return actual; |
|
} |
|
|
|
|
|
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) |
|
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);
|
|
|