diff options
Diffstat (limited to 'drivers/bluetooth/hci_bcsp.c')
| -rw-r--r-- | drivers/bluetooth/hci_bcsp.c | 57 |
1 files changed, 31 insertions, 26 deletions
diff --git a/drivers/bluetooth/hci_bcsp.c b/drivers/bluetooth/hci_bcsp.c index 064f2fefad62..d7d23ceba4d1 100644 --- a/drivers/bluetooth/hci_bcsp.c +++ b/drivers/bluetooth/hci_bcsp.c @@ -102,13 +102,12 @@ static const u16 crc_table[] = { /* Initialise the crc calculator */ #define BCSP_CRC_INIT(x) x = 0xffff -/* - Update crc with next data byte - - Implementation note - The data byte is treated as two nibbles. The crc is generated - in reverse, i.e., bits are fed into the register from the top. -*/ +/* Update crc with next data byte + * + * Implementation note + * The data byte is treated as two nibbles. The crc is generated + * in reverse, i.e., bits are fed into the register from the top. + */ static void bcsp_crc_update(u16 *crc, u8 d) { u16 reg = *crc; @@ -223,9 +222,10 @@ static struct sk_buff *bcsp_prepare_pkt(struct bcsp_struct *bcsp, u8 *data, } /* Max len of packet: (original len +4(bcsp hdr) +2(crc))*2 - (because bytes 0xc0 and 0xdb are escaped, worst case is - when the packet is all made of 0xc0 and 0xdb :) ) - + 2 (0xc0 delimiters at start and end). */ + * (because bytes 0xc0 and 0xdb are escaped, worst case is + * when the packet is all made of 0xc0 and 0xdb :) ) + * + 2 (0xc0 delimiters at start and end). + */ nskb = alloc_skb((len + 6) * 2 + 2, GFP_ATOMIC); if (!nskb) @@ -285,7 +285,7 @@ static struct sk_buff *bcsp_dequeue(struct hci_uart *hu) struct bcsp_struct *bcsp = hu->priv; unsigned long flags; struct sk_buff *skb; - + /* First of all, check for unreliable messages in the queue, since they have priority */ @@ -305,8 +305,9 @@ static struct sk_buff *bcsp_dequeue(struct hci_uart *hu) } /* Now, try to send a reliable pkt. We can only send a - reliable packet if the number of packets sent but not yet ack'ed - is < than the winsize */ + * reliable packet if the number of packets sent but not yet ack'ed + * is < than the winsize + */ spin_lock_irqsave_nested(&bcsp->unack.lock, flags, SINGLE_DEPTH_NESTING); @@ -332,12 +333,14 @@ static struct sk_buff *bcsp_dequeue(struct hci_uart *hu) spin_unlock_irqrestore(&bcsp->unack.lock, flags); /* We could not send a reliable packet, either because there are - none or because there are too many unack'ed pkts. Did we receive - any packets we have not acknowledged yet ? */ + * none or because there are too many unack'ed pkts. Did we receive + * any packets we have not acknowledged yet ? + */ if (bcsp->txack_req) { /* if so, craft an empty ACK pkt and send it on BCSP unreliable - channel 0 */ + * channel 0 + */ struct sk_buff *nskb = bcsp_prepare_pkt(bcsp, NULL, 0, BCSP_ACK_PKT); return nskb; } @@ -399,8 +402,9 @@ static void bcsp_pkt_cull(struct bcsp_struct *bcsp) } /* Handle BCSP link-establishment packets. When we - detect a "sync" packet, symptom that the BT module has reset, - we do nothing :) (yet) */ + * detect a "sync" packet, symptom that the BT module has reset, + * we do nothing :) (yet) + */ static void bcsp_handle_le_pkt(struct hci_uart *hu) { struct bcsp_struct *bcsp = hu->priv; @@ -462,7 +466,7 @@ static inline void bcsp_unslip_one_byte(struct bcsp_struct *bcsp, unsigned char case 0xdd: memcpy(skb_put(bcsp->rx_skb, 1), &db, 1); if ((bcsp->rx_skb->data[0] & 0x40) != 0 && - bcsp->rx_state != BCSP_W4_CRC) + bcsp->rx_state != BCSP_W4_CRC) bcsp_crc_update(&bcsp->message_crc, 0xdb); bcsp->rx_esc_state = BCSP_ESCSTATE_NOESC; bcsp->rx_count--; @@ -534,7 +538,7 @@ static void bcsp_complete_rx_pkt(struct hci_uart *hu) } else { BT_ERR("Packet for unknown channel (%u %s)", bcsp->rx_skb->data[1] & 0x0f, - bcsp->rx_skb->data[0] & 0x80 ? + bcsp->rx_skb->data[0] & 0x80 ? "reliable" : "unreliable"); kfree_skb(bcsp->rx_skb); } @@ -562,7 +566,7 @@ static int bcsp_recv(struct hci_uart *hu, const void *data, int count) struct bcsp_struct *bcsp = hu->priv; const unsigned char *ptr; - BT_DBG("hu %p count %d rx_state %d rx_count %ld", + BT_DBG("hu %p count %d rx_state %d rx_count %ld", hu, count, bcsp->rx_state, bcsp->rx_count); ptr = data; @@ -591,7 +595,7 @@ static int bcsp_recv(struct hci_uart *hu, const void *data, int count) continue; } if (bcsp->rx_skb->data[0] & 0x80 /* reliable pkt */ - && (bcsp->rx_skb->data[0] & 0x07) != bcsp->rxseq_txack) { + && (bcsp->rx_skb->data[0] & 0x07) != bcsp->rxseq_txack) { BT_ERR("Out-of-order packet arrived, got %u expected %u", bcsp->rx_skb->data[0] & 0x07, bcsp->rxseq_txack); @@ -601,7 +605,7 @@ static int bcsp_recv(struct hci_uart *hu, const void *data, int count) continue; } bcsp->rx_state = BCSP_W4_DATA; - bcsp->rx_count = (bcsp->rx_skb->data[1] >> 4) + + bcsp->rx_count = (bcsp->rx_skb->data[1] >> 4) + (bcsp->rx_skb->data[2] << 4); /* May be 0 */ continue; @@ -615,7 +619,7 @@ static int bcsp_recv(struct hci_uart *hu, const void *data, int count) case BCSP_W4_CRC: if (bitrev16(bcsp->message_crc) != bscp_get_crc(bcsp)) { - BT_ERR ("Checksum failed: computed %04x received %04x", + BT_ERR("Checksum failed: computed %04x received %04x", bitrev16(bcsp->message_crc), bscp_get_crc(bcsp)); @@ -653,8 +657,9 @@ static int bcsp_recv(struct hci_uart *hu, const void *data, int count) BCSP_CRC_INIT(bcsp->message_crc); /* Do not increment ptr or decrement count - * Allocate packet. Max len of a BCSP pkt= - * 0xFFF (payload) +4 (header) +2 (crc) */ + * Allocate packet. Max len of a BCSP pkt= + * 0xFFF (payload) +4 (header) +2 (crc) + */ bcsp->rx_skb = bt_skb_alloc(0x1005, GFP_ATOMIC); if (!bcsp->rx_skb) { |