[Bluetooth] Remove TXCRC compile option for BCSP driver

The TXCRC compile option is not really useful and thus change it
into a module parameter.

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

diff --git a/drivers/bluetooth/Kconfig b/drivers/bluetooth/Kconfig
index 543f93e..b9fbe6e 100644 (file)
--- a/drivers/bluetooth/Kconfig
+++ b/drivers/bluetooth/Kconfig
@@ -55,14 +55,6 @@ config BT_HCIUART_BCSP
 
          Say Y here to compile support for HCI BCSP protocol.
 
-config BT_HCIUART_BCSP_TXCRC
-       bool "Transmit CRC with every BCSP packet"
-       depends on BT_HCIUART_BCSP
-       help
-         If you say Y here, a 16-bit CRC checksum will be transmitted along with
-         every BCSP (BlueCore Serial Protocol) packet sent to the Bluetooth chip.
-         This increases reliability, but slightly reduces efficiency.
-
 config BT_HCIBCM203X
        tristate "HCI BCM203x USB driver"
        depends on USB

diff --git a/drivers/bluetooth/hci_bcsp.c b/drivers/bluetooth/hci_bcsp.c
index 0ee324e..91bd293 100644 (file)
--- a/drivers/bluetooth/hci_bcsp.c
+++ b/drivers/bluetooth/hci_bcsp.c
@@ -28,7 +28,7 @@
  * $Id: hci_bcsp.c,v 1.2 2002/09/26 05:05:14 maxk Exp $
  */
 
-#define VERSION "0.2"
+#define VERSION "0.3"
 
 #include <linux/config.h>
 #include <linux/module.h>
@@ -60,6 +60,7 @@
 #define BT_DBG( A... )
 #endif
 
+static int txcrc = 1;
 static int hciextn = 1;
 
 /* ---- BCSP CRC calculation ---- */
@@ -173,11 +174,8 @@ static struct sk_buff *bcsp_prepare_pkt(struct bcsp_struct *bcsp, u8 *data,
 {
        struct sk_buff *nskb;
        u8 hdr[4], chan;
-       int rel, i;
-
-#ifdef CONFIG_BT_HCIUART_BCSP_TXCRC
        u16 BCSP_CRC_INIT(bcsp_txmsg_crc);
-#endif
+       int rel, i;
 
        switch (pkt_type) {
        case HCI_ACLDATA_PKT:
@@ -240,9 +238,9 @@ static struct sk_buff *bcsp_prepare_pkt(struct bcsp_struct *bcsp, u8 *data,
                BT_DBG("Sending packet with seqno %u", bcsp->msgq_txseq);
                bcsp->msgq_txseq = ++(bcsp->msgq_txseq) & 0x07;
        }
-#ifdef CONFIG_BT_HCIUART_BCSP_TXCRC
-       hdr[0] |= 0x40;
-#endif
+
+       if (bcsp->use_crc)
+               hdr[0] |= 0x40;
 
        hdr[1] = ((len << 4) & 0xff) | chan;
        hdr[2] = len >> 4;
@@ -251,25 +249,25 @@ static struct sk_buff *bcsp_prepare_pkt(struct bcsp_struct *bcsp, u8 *data,
        /* Put BCSP header */
        for (i = 0; i < 4; i++) {
                bcsp_slip_one_byte(nskb, hdr[i]);
-#ifdef CONFIG_BT_HCIUART_BCSP_TXCRC
-               bcsp_crc_update(&bcsp_txmsg_crc, hdr[i]);
-#endif
+
+               if (bcsp->use_crc)
+                       bcsp_crc_update(&bcsp_txmsg_crc, hdr[i]);
        }
 
        /* Put payload */
        for (i = 0; i < len; i++) {
                bcsp_slip_one_byte(nskb, data[i]);
-#ifdef CONFIG_BT_HCIUART_BCSP_TXCRC
-               bcsp_crc_update(&bcsp_txmsg_crc, data[i]);
-#endif
+
+               if (bcsp->use_crc)
+                       bcsp_crc_update(&bcsp_txmsg_crc, data[i]);
        }
 
-#ifdef CONFIG_BT_HCIUART_BCSP_TXCRC
        /* Put CRC */
-       bcsp_txmsg_crc = bcsp_crc_reverse(bcsp_txmsg_crc);
-       bcsp_slip_one_byte(nskb, (u8) ((bcsp_txmsg_crc >> 8) & 0x00ff));
-       bcsp_slip_one_byte(nskb, (u8) (bcsp_txmsg_crc & 0x00ff));
-#endif
+       if (bcsp->use_crc) {
+               bcsp_txmsg_crc = bcsp_crc_reverse(bcsp_txmsg_crc);
+               bcsp_slip_one_byte(nskb, (u8) ((bcsp_txmsg_crc >> 8) & 0x00ff));
+               bcsp_slip_one_byte(nskb, (u8) (bcsp_txmsg_crc & 0x00ff));
+       }
 
        bcsp_slip_msgdelim(nskb);
        return nskb;
@@ -698,6 +696,9 @@ static int bcsp_open(struct hci_uart *hu)
 
        bcsp->rx_state = BCSP_W4_PKT_DELIMITER;
 
+       if (txcrc)
+               bcsp->use_crc = 1;
+
        return 0;
 }
 
@@ -743,5 +744,8 @@ int bcsp_deinit(void)
        return hci_uart_unregister_proto(&bcsp);
 }
 
+module_param(txcrc, bool, 0644);
+MODULE_PARM_DESC(txcrc, "Transmit CRC with every BCSP packet");
+
 module_param(hciextn, bool, 0644);
 MODULE_PARM_DESC(hciextn, "Convert HCI Extensions into BCSP packets");

diff --git a/drivers/bluetooth/hci_bcsp.h b/drivers/bluetooth/hci_bcsp.h
index a2b3bb9..01bbc66 100644 (file)
--- a/drivers/bluetooth/hci_bcsp.h
+++ b/drivers/bluetooth/hci_bcsp.h
@@ -60,6 +60,7 @@ struct bcsp_struct {
                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? */
 

diff --git a/drivers/bluetooth/hci_ldisc.c b/drivers/bluetooth/hci_ldisc.c
index aed80cc..8c9317b 100644 (file)
--- a/drivers/bluetooth/hci_ldisc.c
+++ b/drivers/bluetooth/hci_ldisc.c
@@ -27,7 +27,7 @@
  *
  * $Id: hci_ldisc.c,v 1.5 2002/10/02 18:37:20 maxk Exp $    
  */
-#define VERSION "2.1"
+#define VERSION "2.2"
 
 #include <linux/config.h>
 #include <linux/module.h>