diff options
| author | Sebastian Reichel <sre@kernel.org> | 2017-03-28 18:59:34 +0300 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2017-04-12 23:12:17 +0300 |
| commit | aeac30140694824f26d14655271e1dcf3e32fd49 (patch) | |
| tree | e3c11cc8c3231ae7c6bd60ef20bf9871500cd91d | |
| parent | 756db778748949f6403b727fc6251674dbfcb1a2 (diff) | |
| download | linux-aeac30140694824f26d14655271e1dcf3e32fd49.tar.xz | |
Bluetooth: hci_uart: add support for word alignment
This will be used by Nokia's H4+ protocol, which
uses 2-byte aligned packets.
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
| -rw-r--r-- | drivers/bluetooth/hci_h4.c | 17 | ||||
| -rw-r--r-- | drivers/bluetooth/hci_ldisc.c | 4 | ||||
| -rw-r--r-- | drivers/bluetooth/hci_uart.h | 3 |
3 files changed, 24 insertions, 0 deletions
diff --git a/drivers/bluetooth/hci_h4.c b/drivers/bluetooth/hci_h4.c index 635597b6e168..82e5a32b87a4 100644 --- a/drivers/bluetooth/hci_h4.c +++ b/drivers/bluetooth/hci_h4.c @@ -171,9 +171,20 @@ struct sk_buff *h4_recv_buf(struct hci_dev *hdev, struct sk_buff *skb, const unsigned char *buffer, int count, const struct h4_recv_pkt *pkts, int pkts_count) { + struct hci_uart *hu = hci_get_drvdata(hdev); + u8 alignment = hu->alignment; + while (count) { int i, len; + /* remove padding bytes from buffer */ + for (; hu->padding && count > 0; hu->padding--) { + count--; + buffer++; + } + if (!count) + break; + if (!skb) { for (i = 0; i < pkts_count; i++) { if (buffer[0] != (&pkts[i])->type) @@ -253,11 +264,17 @@ struct sk_buff *h4_recv_buf(struct hci_dev *hdev, struct sk_buff *skb, } if (!dlen) { + hu->padding = (skb->len - 1) % alignment; + hu->padding = (alignment - hu->padding) % alignment; + /* No more data, complete frame */ (&pkts[i])->recv(hdev, skb); skb = NULL; } } else { + hu->padding = (skb->len - 1) % alignment; + hu->padding = (alignment - hu->padding) % alignment; + /* Complete frame */ (&pkts[i])->recv(hdev, skb); skb = NULL; diff --git a/drivers/bluetooth/hci_ldisc.c b/drivers/bluetooth/hci_ldisc.c index 9497c469efd2..0ec8a94bd712 100644 --- a/drivers/bluetooth/hci_ldisc.c +++ b/drivers/bluetooth/hci_ldisc.c @@ -459,6 +459,10 @@ static int hci_uart_tty_open(struct tty_struct *tty) hu->tty = tty; tty->receive_room = 65536; + /* disable alignment support by default */ + hu->alignment = 1; + hu->padding = 0; + INIT_WORK(&hu->init_ready, hci_uart_init_work); INIT_WORK(&hu->write_work, hci_uart_write_work); diff --git a/drivers/bluetooth/hci_uart.h b/drivers/bluetooth/hci_uart.h index 070139513e65..4aff50960cac 100644 --- a/drivers/bluetooth/hci_uart.h +++ b/drivers/bluetooth/hci_uart.h @@ -92,6 +92,9 @@ struct hci_uart { unsigned int init_speed; unsigned int oper_speed; + + u8 alignment; + u8 padding; }; /* HCI_UART proto flag bits */ |