From e2edc0c3988319f94f2d3706299f4e9ebe388b1d Mon Sep 17 00:00:00 2001
From: "matthias.ringwald"
 <matthias.ringwald@1a0a8af8-31b5-11de-8e0c-53a27eea117e>
Date: Sun, 25 Jul 2010 15:11:33 +0000
Subject: [PATCH] read buffer size on hci init

---
 include/btstack/hci_cmds.h |  1 +
 src/hci.c                  | 27 +++++++++++++++++++++------
 src/hci.h                  |  4 +++-
 src/hci_cmds.c             | 11 ++++++++---
 4 files changed, 33 insertions(+), 10 deletions(-)

diff --git a/include/btstack/hci_cmds.h b/include/btstack/hci_cmds.h
index 0437c607d..852562b64 100644
--- a/include/btstack/hci_cmds.h
+++ b/include/btstack/hci_cmds.h
@@ -209,6 +209,7 @@ extern hci_cmd_t hci_pin_code_request_reply;
 extern hci_cmd_t hci_pin_code_request_negative_reply;
 extern hci_cmd_t hci_qos_setup;
 extern hci_cmd_t hci_read_bd_addr;
+extern hci_cmd_t hci_read_buffer_size;
 extern hci_cmd_t hci_read_link_policy_settings;
 extern hci_cmd_t hci_read_link_supervision_timeout;
 extern hci_cmd_t hci_remote_name_request;
diff --git a/src/hci.c b/src/hci.c
index 6f72e29d6..5b2d234a7 100644
--- a/src/hci.c
+++ b/src/hci.c
@@ -257,12 +257,24 @@ static void event_handler(uint8_t *packet, int size){
     hci_con_handle_t handle;
     hci_connection_t * conn;
     
+    // get num_cmd_packets
+    if (packet[0] == HCI_EVENT_COMMAND_COMPLETE || packet[0] == HCI_EVENT_COMMAND_STATUS){
+        // Get Num_HCI_Command_Packets
+        hci_stack.num_cmd_packets = packet[2];
+    }
+    
     switch (packet[0]) {
             
         case HCI_EVENT_COMMAND_COMPLETE:
-        case HCI_EVENT_COMMAND_STATUS:
-            // Get Num_HCI_Command_Packets
-            hci_stack.num_cmd_packets = packet[2];
+            if (COMMAND_COMPLETE_EVENT(packet, hci_read_buffer_size)){
+                // from offset 5
+                // status 
+                hci_stack.acl_data_packet_length = READ_BT_16(packet, 6);
+                // SCO data packet len (8)
+                hci_stack.total_num_acl_packets  = packet[9];
+                // total num SCO packets
+                log_dbg("hci_read_buffer_size: size %u, count %u\n", hci_stack.acl_data_packet_length, hci_stack.total_num_acl_packets); 
+            }
             break;
         
         case HCI_EVENT_CONNECTION_REQUEST:
@@ -462,14 +474,17 @@ void hci_run(){
 				case 1:
 					hci_send_cmd(&hci_read_bd_addr);
 					break;
-                case 2:
+				case 2:
+					hci_send_cmd(&hci_read_buffer_size);
+					break;
+                case 3:
                     // ca. 15 sec
                     hci_send_cmd(&hci_write_page_timeout, 0x6000);
                     break;
-				case 3:
+				case 4:
 					hci_send_cmd(&hci_write_scan_enable, 3); // 3 inq scan + page scan
 					break;
-                case 4:
+                case 5:
                     // done.
                     hci_stack.state = HCI_STATE_WORKING;
                     hci_emit_state();
diff --git a/src/hci.h b/src/hci.h
index e6b09e180..1eaf80b67 100644
--- a/src/hci.h
+++ b/src/hci.h
@@ -189,7 +189,9 @@ typedef struct {
     
     /* host to controller flow control */
     uint8_t  num_cmd_packets;
-    uint8_t  num_acl_packets;
+    // uint8_t  total_num_cmd_packets;
+    uint8_t  total_num_acl_packets;
+    uint16_t acl_data_packet_length;
 
     /* callback to L2CAP layer */
     void (*packet_handler)(uint8_t packet_type, uint8_t *packet, uint16_t size);
diff --git a/src/hci_cmds.c b/src/hci_cmds.c
index b85108c20..3e4316fb6 100644
--- a/src/hci_cmds.c
+++ b/src/hci_cmds.c
@@ -238,7 +238,7 @@ OPCODE(OGF_LINK_POLICY, 0x0c), "H"
 };
 hci_cmd_t hci_write_link_policy_settings = {
 OPCODE(OGF_LINK_POLICY, 0x0d), "H2"
-// handlee, settings
+// handle, settings
 };
 
 /**
@@ -296,19 +296,24 @@ hci_cmd_t hci_write_extended_inquiry_response = {
 OPCODE(OGF_CONTROLLER_BASEBAND, 0x52), "1E"
 // FEC_Required, Exstended Inquiry Response
 };
-
 hci_cmd_t hci_write_simple_pairing_mode = {
 OPCODE(OGF_CONTROLLER_BASEBAND, 0x56), "1"
 // mode: 0 = off, 1 = on
 };
 
+/**
+ * Informational Parameters
+ */
+hci_cmd_t hci_read_buffer_size = {
+OPCODE(OGF_INFORMATIONAL_PARAMETERS, 0x05), ""
+// no params
+};
 hci_cmd_t hci_read_bd_addr = {
 OPCODE(OGF_INFORMATIONAL_PARAMETERS, 0x09), ""
 // no params
 };
 
 // BTstack commands
-
 hci_cmd_t btstack_get_state = {
 OPCODE(OGF_BTSTACK, BTSTACK_GET_STATE), ""
 // no params ->