[Bluetooth] Cleanup of the HCI UART driver

This patch contains the big cleanup of the HCI UART driver. The uneeded
header files are removed and their structure declarations are moved into
the protocol implementations.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

1 files changed, 78 insertions, 42 deletions

diff --git a/drivers/bluetooth/hci_bcsp.c b/drivers/bluetooth/hci_bcsp.c
index 91bd293d7a0a..0a4761415ac3 100644
--- a/drivers/bluetooth/hci_bcsp.c
+++ b/drivers/bluetooth/hci_bcsp.c
@@ -1,35 +1,27 @@
-/* 
-   BlueCore Serial Protocol (BCSP) for Linux Bluetooth stack (BlueZ).
-   Copyright 2002 by Fabrizio Gennari <fabrizio.gennari@philips.com>
-
-   Based on
-       hci_h4.c  by Maxim Krasnyansky <maxk@qualcomm.com>
-       ABCSP     by Carl Orsborn <cjo@csr.com>
-
-   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;
-
-   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
-   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
-   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES 
-   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 
-   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 
-   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-
-   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, 
-   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS 
-   SOFTWARE IS DISCLAIMED.
-*/
-
 /*
- * $Id: hci_bcsp.c,v 1.2 2002/09/26 05:05:14 maxk Exp $
+ *
+ *  Bluetooth HCI UART driver
+ *
+ *  Copyright (C) 2002-2003  Fabrizio Gennari <fabrizio.gennari@philips.com>
+ *  Copyright (C) 2004-2005  Marcel Holtmann <marcel@holtmann.org>
+ *
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
  */
 
-#define VERSION "0.3"
-
 #include <linux/config.h>
 #include <linux/module.h>
 
@@ -52,17 +44,56 @@
 
 #include <net/bluetooth/bluetooth.h>
 #include <net/bluetooth/hci_core.h>
+
 #include "hci_uart.h"
-#include "hci_bcsp.h"
 
 #ifndef CONFIG_BT_HCIUART_DEBUG
 #undef  BT_DBG
 #define BT_DBG( A... )
 #endif
 
+#define VERSION "0.3"
+
 static int txcrc = 1;
 static int hciextn = 1;
 
+#define BCSP_TXWINSIZE  4
+
+#define BCSP_ACK_PKT    0x05
+#define BCSP_LE_PKT     0x06
+
+struct bcsp_struct {
+        struct sk_buff_head unack;      /* Unack'ed packets queue */
+        struct sk_buff_head rel;        /* Reliable packets queue */
+        struct sk_buff_head unrel;      /* Unreliable packets queue */
+
+        unsigned long rx_count;
+        struct  sk_buff *rx_skb;
+        u8      rxseq_txack;            /* rxseq == txack. */
+        u8      rxack;                  /* Last packet sent by us that the peer ack'ed */
+        struct  timer_list tbcsp;
+
+        enum {
+                BCSP_W4_PKT_DELIMITER,
+                BCSP_W4_PKT_START,
+                BCSP_W4_BCSP_HDR,
+                BCSP_W4_DATA,
+                BCSP_W4_CRC
+        } rx_state;
+
+        enum {
+                BCSP_ESCSTATE_NOESC,
+                BCSP_ESCSTATE_ESC
+        } rx_esc_state;
+
+        u8      use_crc;
+        u16     message_crc;
+        u8      txack_req;              /* Do we need to send ack's to the peer? */
+
+        /* Reliable packet sequence number - used to assign seq to each rel pkt. */
+        u8      msgq_txseq;
+};
+
 /* ---- BCSP CRC calculation ---- */
 
 /* Table for calculating CRC for polynomial 0x1021, LSB processed first,
@@ -112,6 +143,7 @@ static u16 bcsp_crc_reverse(u16 crc)
                 rev |= (crc & 1);
                 crc = crc >> 1;
         }
+
         return (rev);
 }
 
@@ -120,6 +152,7 @@ static u16 bcsp_crc_reverse(u16 crc)
 static void bcsp_slip_msgdelim(struct sk_buff *skb)
 {
         const char pkt_delim = 0xc0;
+
         memcpy(skb_put(skb, 1), &pkt_delim, 1);
 }
 
@@ -315,7 +348,6 @@ 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 ? */
@@ -361,7 +393,7 @@ static void bcsp_pkt_cull(struct bcsp_struct *bcsp)
                 BT_ERR("Peer acked invalid packet");
 
         BT_DBG("Removing %u pkts out of %u, up to seqno %u",
-               pkts_to_be_removed, bcsp->unack.qlen, (seqno - 1) & 0x07);
+                pkts_to_be_removed, bcsp->unack.qlen, (seqno - 1) & 0x07);
 
         for (i = 0, skb = ((struct sk_buff *) &bcsp->unack)->next; i < pkts_to_be_removed
                         && skb != (struct sk_buff *) &bcsp->unack; i++) {
@@ -372,8 +404,10 @@ static void bcsp_pkt_cull(struct bcsp_struct *bcsp)
                 kfree_skb(skb);
                 skb = nskb;
         }
+
         if (bcsp->unack.qlen == 0)
                 del_timer(&bcsp->tbcsp);
+
         spin_unlock_irqrestore(&bcsp->unack.lock, flags);
 
         if (i != pkts_to_be_removed)
@@ -528,6 +562,7 @@ static inline void bcsp_complete_rx_pkt(struct hci_uart *hu)
 
                 hci_recv_frame(bcsp->rx_skb);
         }
+
         bcsp->rx_state = BCSP_W4_PKT_DELIMITER;
         bcsp->rx_skb = NULL;
 }
@@ -596,8 +631,8 @@ static int bcsp_recv(struct hci_uart *hu, void *data, int count)
 
                                 BT_ERR ("Checksum failed: computed %04x received %04x",
                                         bcsp_crc_reverse(bcsp->message_crc),
-                                        (bcsp->rx_skb-> data[bcsp->rx_skb->len - 2] << 8) +
-                                        bcsp->rx_skb->data[bcsp->rx_skb->len - 1]);
+                                        (bcsp->rx_skb-> data[bcsp->rx_skb->len - 2] << 8) +
+                                        bcsp->rx_skb->data[bcsp->rx_skb->len - 1]);
 
                                 kfree_skb(bcsp->rx_skb);
                                 bcsp->rx_state = BCSP_W4_PKT_DELIMITER;
@@ -631,7 +666,7 @@ static int bcsp_recv(struct hci_uart *hu, void *data, int count)
                                 bcsp->rx_count = 4;
                                 bcsp->rx_esc_state = BCSP_ESCSTATE_NOESC;
                                 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) */
@@ -719,18 +754,19 @@ static int bcsp_close(struct hci_uart *hu)
 }
 
 static struct hci_uart_proto bcsp = {
-        .id      = HCI_UART_BCSP,
-        .open    = bcsp_open,
-        .close   = bcsp_close,
-        .enqueue = bcsp_enqueue,
-        .dequeue = bcsp_dequeue,
-        .recv    = bcsp_recv,
-        .flush   = bcsp_flush
+        .id             = HCI_UART_BCSP,
+        .open           = bcsp_open,
+        .close          = bcsp_close,
+        .enqueue        = bcsp_enqueue,
+        .dequeue        = bcsp_dequeue,
+        .recv           = bcsp_recv,
+        .flush          = bcsp_flush
 };
 
 int bcsp_init(void)
 {
         int err = hci_uart_register_proto(&bcsp);
+
         if (!err)
                 BT_INFO("HCI BCSP protocol initialized");
         else