distribution/packages/network/bluez/patches/bluez-08-hciattach-retry-device-reset-when-no-response.patch

From 57f7aead147b138109709bbef9d4c674a3a6dc9b Mon Sep 17 00:00:00 2001
From: meijjaa <jjmeijer88@gmail.com>
Date: Mon, 23 Jan 2017 22:35:33 +0100
Subject: [PATCH] hciattach: retry device reset when no response

Some bcm chips need a couple of retries to reset. Currently init will just
timeout after a failed reset.

Signed-off-by: meijjaa <jjmeijer88@gmail.com>
---
 tools/hciattach_bcm43xx.c | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/tools/hciattach_bcm43xx.c b/tools/hciattach_bcm43xx.c
index bb24483..ad89161 100644
--- a/tools/hciattach_bcm43xx.c
+++ b/tools/hciattach_bcm43xx.c
@@ -24,6 +24,7 @@
 #include <time.h>
 #include <limits.h>
 #include <sys/stat.h>
+#include <signal.h>

 #include "lib/bluetooth.h"
 #include "lib/hci.h"
@@ -82,21 +83,31 @@ fail:
 	return -1;
 }

+int _fd;
+void expired(int sig)
+{
+	unsigned char cmd[] = { HCI_COMMAND_PKT, 0x03, 0x0C, 0x00 };
+	write(_fd, cmd, sizeof(cmd)) != sizeof(cmd);
+	alarm(4);
+}
+
 static int bcm43xx_reset(int fd)
 {
 	unsigned char cmd[] = { HCI_COMMAND_PKT, 0x03, 0x0C, 0x00 };
 	unsigned char resp[CC_MIN_SIZE];

+	_fd = fd;
+	signal(SIGALRM, expired);
 	if (write(fd, cmd, sizeof(cmd)) != sizeof(cmd)) {
 		fprintf(stderr, "Failed to write reset command\n");
 		return -1;
 	}
-
+	alarm(4);
 	if (read_hci_event(fd, resp, sizeof(resp)) < CC_MIN_SIZE) {
 		fprintf(stderr, "Failed to reset chip, invalid HCI event\n");
 		return -1;
 	}
-
+	alarm(0);
 	if (resp[4] != cmd[1] || resp[5] != cmd[2] || resp[6] != CMD_SUCCESS) {
 		fprintf(stderr, "Failed to reset chip, command failure\n");
 		return -1;
--
2.38.1