static void hci_usb_bulk_read(struct urb *urb)
{
struct hci_usb *husb = (struct hci_usb *) urb->context;
unsigned char *data = urb->transfer_buffer;
int count = urb->actual_length, status;
struct sk_buff *skb;
hci_acl_hdr *ah;
register __u16 dlen;
if (!husb)
return;
DBG("%s status %d, count %d, flags %x", husb->hdev.name, urb->status, count, urb->transfer_flags);
if (urb->status) {
/* Do not re-submit URB on critical errors */
switch (urb->status) {
case -ENOENT:
return;
default:
goto resubmit;
};
}
if (!count)
goto resubmit;
DMP(data, count);
ah = (hci_acl_hdr *) data;
dlen = le16_to_cpu(ah->dlen);
/* Verify frame len and completeness */
if ((count - HCI_ACL_HDR_SIZE) != dlen) {
ERR("%s corrupted ACL packet: count %d, plen %d", husb->hdev.name, count, dlen);
goto resubmit;
}
/* Allocate packet */
if (!(skb = bluez_skb_alloc(count, GFP_ATOMIC))) {
ERR("Can't allocate mem for new packet");
goto resubmit;
}
memcpy(skb_put(skb, count), data, count);
skb->dev = (void *) &husb->hdev;
skb->pkt_type = HCI_ACLDATA_PKT;
husb->hdev.stat.byte_rx += skb->len;
hci_recv_frame(skb);
resubmit:
husb->read_urb->dev = husb->udev;
if ((status = usb_submit_urb(husb->read_urb)))
DBG("%s read URB submit failed %d", husb->hdev.name, status);
DBG("%s read URB re-submited", husb->hdev.name);
}
int n_hci_tx_wakeup(struct n_hci *n_hci)
{
register struct tty_struct *tty = n_hci->tty;
if (test_and_set_bit(TRANS_SENDING, &n_hci->tx_state)) {
set_bit(TRANS_WAKEUP, &n_hci->tx_state);
return 0;
}
DBG("");
do {
register struct sk_buff *skb;
register int len;
clear_bit(TRANS_WAKEUP, &n_hci->tx_state);
if (!(skb = skb_dequeue(&n_hci->txq)))
break;
DMP(skb->data, skb->len);
/* Send frame to TTY driver */
tty->flags |= (1 << TTY_DO_WRITE_WAKEUP);
len = tty->driver.write(tty, 0, skb->data, skb->len);
n_hci->hdev.stat.byte_tx += len;
DBG("sent %d", len);
if (len == skb->len) {
/* Full frame was sent */
kfree_skb(skb);
} else {
/* Subtract sent part and requeue */
skb_pull(skb, len);
skb_queue_head(&n_hci->txq, skb);
}
} while (test_bit(TRANS_WAKEUP, &n_hci->tx_state));
clear_bit(TRANS_SENDING, &n_hci->tx_state);
return 0;
}
static inline int n_hci_check_data_len(struct n_hci *n_hci, int len)
{
register int room = skb_tailroom(n_hci->rx_skb);
DBG("len %d room %d", len, room);
if (!len) {
DMP(n_hci->rx_skb->data, n_hci->rx_skb->len);
hci_recv_frame(n_hci->rx_skb);
} else if (len > room) {
ERR("Data length is to large");
kfree_skb(n_hci->rx_skb);
n_hci->hdev.stat.err_rx++;
} else {
n_hci->rx_state = WAIT_DATA;
n_hci->rx_count = len;
return len;
}
n_hci->rx_state = WAIT_PACKET_TYPE;
n_hci->rx_skb = NULL;
n_hci->rx_count = 0;
return 0;
}
// Parse RAW data and store internally
rr_ret
rr_parse(rr_ctx *ctx, UInt32 len, UInt8 *d)
{
rr_ret ret;
UInt32 n, m;
UInt32 (*fn)(rr_ctx *, UInt32, UInt8 *);
int nextState;
n = 0;
while (n < len && !ctx->done)
{
switch (ctx->state)
{
case DDS_INIT:
DMP("INIT\n");
fn = rr_init;
nextState = DDS_INTERSPACE;
break;
case DDS_INTERSPACE:
DMP("INTERSPACE\n");
fn = rr_interspace;
nextState = DDS_PULSE;
break;
case DDS_PULSE:
DMP("PULSE\n");
fn = rr_pulse;
nextState = DDS_SPACE;
break;
case DDS_SPACE:
DMP("SPACE\n");
fn = rr_space;
nextState = DDS_PULSE;
break;
default:
fn = NULL;
}
m = fn(ctx, len - n, &d[n]);
ctx->state = nextState;
if (m > len - n) break;
n += m;
}
ret.n = n;
if (ctx->done)
{
ret.done = 1;
if (ret.n >= 2)
{
ret.m = (ctx->done == 1 ? n - 2 : n); // partial
} else
{
ret.m = ret.n;
}
ret.d[0] = ret.d[1] = 0; // 0 inter-space delay
ctx->state = DDS_INIT;
ctx->done = 0;
} else
{
ret.done = 0;
ret.m = ret.n;
}
return ret;
}
static void hci_usb_intr(struct urb *urb)
{
struct hci_usb *husb = (struct hci_usb *) urb->context;
unsigned char *data = urb->transfer_buffer;
register int count = urb->actual_length;
register struct sk_buff *skb = husb->intr_skb;
hci_event_hdr *eh;
register int len;
if (!husb)
return;
DBG("%s count %d", husb->hdev.name, count);
if (urb->status || !count) {
DBG("%s intr status %d, count %d", husb->hdev.name, urb->status, count);
return;
}
/* Do we really have to handle continuations here ? */
if (!skb) {
/* New frame */
if (count < HCI_EVENT_HDR_SIZE) {
DBG("%s bad frame len %d", husb->hdev.name, count);
return;
}
eh = (hci_event_hdr *) data;
len = eh->plen + HCI_EVENT_HDR_SIZE;
if (count > len) {
DBG("%s corrupted frame, len %d", husb->hdev.name, count);
return;
}
/* Allocate skb */
if (!(skb = bluez_skb_alloc(len, GFP_ATOMIC))) {
ERR("Can't allocate mem for new packet");
return;
}
skb->dev = (void *) &husb->hdev;
skb->pkt_type = HCI_EVENT_PKT;
husb->intr_skb = skb;
husb->intr_count = len;
} else {
/* Continuation */
if (count > husb->intr_count) {
ERR("%s bad frame len %d (expected %d)", husb->hdev.name, count, husb->intr_count);
kfree_skb(skb);
husb->intr_skb = NULL;
husb->intr_count = 0;
return;
}
}
memcpy(skb_put(skb, count), data, count);
husb->intr_count -= count;
DMP(data, count);
if (!husb->intr_count) {
/* Got complete frame */
husb->hdev.stat.byte_rx += skb->len;
hci_recv_frame(skb);
husb->intr_skb = NULL;
}
}
static inline void n_hci_rx(struct n_hci *n_hci, const __u8 * data, char *flags, int count)
{
register const char *ptr;
hci_event_hdr *eh;
hci_acl_hdr *ah;
hci_sco_hdr *sh;
register int len, type, dlen;
DBG("count %d state %ld rx_count %ld", count, n_hci->rx_state, n_hci->rx_count);
n_hci->hdev.stat.byte_rx += count;
ptr = data;
while (count) {
if (n_hci->rx_count) {
len = MIN(n_hci->rx_count, count);
memcpy(skb_put(n_hci->rx_skb, len), ptr, len);
n_hci->rx_count -= len; count -= len; ptr += len;
if (n_hci->rx_count)
continue;
switch (n_hci->rx_state) {
case WAIT_DATA:
DBG("Complete data");
DMP(n_hci->rx_skb->data, n_hci->rx_skb->len);
hci_recv_frame(n_hci->rx_skb);
n_hci->rx_state = WAIT_PACKET_TYPE;
n_hci->rx_skb = NULL;
continue;
case WAIT_EVENT_HDR:
eh = (hci_event_hdr *) n_hci->rx_skb->data;
DBG("Event header: evt 0x%2.2x plen %d", eh->evt, eh->plen);
n_hci_check_data_len(n_hci, eh->plen);
continue;
case WAIT_ACL_HDR:
ah = (hci_acl_hdr *) n_hci->rx_skb->data;
dlen = __le16_to_cpu(ah->dlen);
DBG("ACL header: dlen %d", dlen);
n_hci_check_data_len(n_hci, dlen);
continue;
case WAIT_SCO_HDR:
sh = (hci_sco_hdr *) n_hci->rx_skb->data;
DBG("SCO header: dlen %d", sh->dlen);
n_hci_check_data_len(n_hci, sh->dlen);
continue;
};
}
/* WAIT_PACKET_TYPE */
switch (*ptr) {
case HCI_EVENT_PKT:
DBG("Event packet");
n_hci->rx_state = WAIT_EVENT_HDR;
n_hci->rx_count = HCI_EVENT_HDR_SIZE;
type = HCI_EVENT_PKT;
break;
case HCI_ACLDATA_PKT:
DBG("ACL packet");
n_hci->rx_state = WAIT_ACL_HDR;
n_hci->rx_count = HCI_ACL_HDR_SIZE;
type = HCI_ACLDATA_PKT;
break;
case HCI_SCODATA_PKT:
DBG("SCO packet");
n_hci->rx_state = WAIT_SCO_HDR;
n_hci->rx_count = HCI_SCO_HDR_SIZE;
type = HCI_SCODATA_PKT;
break;
default:
ERR("Unknown HCI packet type %2.2x", (__u8)*ptr);
n_hci->hdev.stat.err_rx++;
ptr++; count--;
continue;
};
ptr++; count--;
/* Allocate packet */
if (!(n_hci->rx_skb = bluez_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC))) {
ERR("Can't allocate mem for new packet");
n_hci->rx_state = WAIT_PACKET_TYPE;
n_hci->rx_count = 0;
return;
}
n_hci->rx_skb->dev = (void *) &n_hci->hdev;
n_hci->rx_skb->pkt_type = type;
}
}
