Commit 01d5e44a authored by Marcel Holtmann's avatar Marcel Holtmann Committed by Johan Hedberg

Bluetooth: hci_bcm: Handle empty packet after firmware loading

The Broadcom controller on the Raspberry Pi3 sends an empty packet with
packet type 0x00 after launching the firmware. This will cause logging
of errors.

  Bluetooth: hci0: Frame reassembly failed (-84)

Since this seems to be an intented behaviour of the controller, handle
it gracefully by parsing that empty packet with packet type 0x00 and
then just simply report it as diagnostic packet.

With that change no errors are logging and the packet itself is actually
recorded in the Bluetooth monitor traces.

  < HCI Command: Broadcom Launch RAM (0x3f|0x004e) plen 4
         Address: 0xffffffff
  > HCI Event: Command Complete (0x0e) plen 4
       Broadcom Launch RAM (0x3f|0x004e) ncmd 1
         Status: Success (0x00)
  = Vendor Diagnostic (len 0)
  < HCI Command: Broadcom Update UART Baud Rate (0x3f|0x0018) plen 6
         00 00 00 10 0e 00                                ......
  > HCI Event: Command Complete (0x0e) plen 4
       Broadcom Update UART Baud Rate (0x3f|0x0018) ncmd 1
         Status: Success (0x00)
  < HCI Command: Reset (0x03|0x0003) plen 0
  > HCI Event: Command Complete (0x0e) plen 4
       Reset (0x03|0x0003) ncmd 1
         Status: Success (0x00)
Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: default avatarJohan Hedberg <johan.hedberg@intel.com>
parent 778ead34
...@@ -44,6 +44,9 @@ ...@@ -44,6 +44,9 @@
#include "btbcm.h" #include "btbcm.h"
#include "hci_uart.h" #include "hci_uart.h"
#define BCM_NULL_PKT 0x00
#define BCM_NULL_SIZE 0
#define BCM_LM_DIAG_PKT 0x07 #define BCM_LM_DIAG_PKT 0x07
#define BCM_LM_DIAG_SIZE 63 #define BCM_LM_DIAG_SIZE 63
...@@ -468,11 +471,19 @@ static int bcm_setup(struct hci_uart *hu) ...@@ -468,11 +471,19 @@ static int bcm_setup(struct hci_uart *hu)
.lsize = 0, \ .lsize = 0, \
.maxlen = BCM_LM_DIAG_SIZE .maxlen = BCM_LM_DIAG_SIZE
#define BCM_RECV_NULL \
.type = BCM_NULL_PKT, \
.hlen = BCM_NULL_SIZE, \
.loff = 0, \
.lsize = 0, \
.maxlen = BCM_NULL_SIZE
static const struct h4_recv_pkt bcm_recv_pkts[] = { static const struct h4_recv_pkt bcm_recv_pkts[] = {
{ H4_RECV_ACL, .recv = hci_recv_frame }, { H4_RECV_ACL, .recv = hci_recv_frame },
{ H4_RECV_SCO, .recv = hci_recv_frame }, { H4_RECV_SCO, .recv = hci_recv_frame },
{ H4_RECV_EVENT, .recv = hci_recv_frame }, { H4_RECV_EVENT, .recv = hci_recv_frame },
{ BCM_RECV_LM_DIAG, .recv = hci_recv_diag }, { BCM_RECV_LM_DIAG, .recv = hci_recv_diag },
{ BCM_RECV_NULL, .recv = hci_recv_diag },
}; };
static int bcm_recv(struct hci_uart *hu, const void *data, int count) static int bcm_recv(struct hci_uart *hu, const void *data, int count)
......
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