Add sllin kernel module for LIN support

For porter ext01 board use ldattach 25 /dev/ttySC9 to enable sllin line
discipline.

4 files changed, 139 insertions, 0 deletions

diff --git a/common/recipes-support/sllin/files/0001-cross-compile.patch b/common/recipes-support/sllin/files/0001-cross-compile.patch
new file mode 100644
index 0000000..8011028
--- /dev/null
+++ b/common/recipes-support/sllin/files/0001-cross-compile.patch
@@ -0,0 +1,26 @@
+From c65b62a8e1b183fac9a32f7b0282b4f3156a5840 Mon Sep 17 00:00:00 2001
+From: Andrey Gusakov <andrey.gusakov@cogentembedded.com>
+Date: Tue, 19 Apr 2016 14:15:07 +0300
+Subject: [PATCH 1/2] cross-compile
+
+
+Signed-off-by: Andrey Gusakov <andrey.gusakov@cogentembedded.com>
+---
+ sllin/Makefile |    4 +---
+ 1 file changed, 1 insertion(+), 3 deletions(-)
+
+diff --git a/sllin/Makefile b/sllin/Makefile
+index 8ae7510..23caf8e 100644
+--- a/sllin/Makefile
++++ b/sllin/Makefile
+@@ -1,7 +1,5 @@
+ obj-m += sllin.o
+-KPATH=/lib/modules/$(shell uname -r)/build
+-#KPATH=/mnt/data/_dokumenty_/_w_/_dce_can_/src/can-benchmark/kernel/build/shark/3.0.4
+-#KPATH=/mnt/data/_dokumenty_/_w_/_dce_can_/src/can-benchmark/kernel/build/shark/2.6.36
++#KPATH=/lib/modules/$(shell uname -r)/build
+
+ all:
+	make -C ${KPATH} M=$(PWD) modules
+--
+1.7.10.4
diff --git a/common/recipes-support/sllin/files/0002-fix-termios-struct-access.patch b/common/recipes-support/sllin/files/0002-fix-termios-struct-access.patch
new file mode 100644
index 0000000..74c29e0
--- /dev/null
+++ b/common/recipes-support/sllin/files/0002-fix-termios-struct-access.patch
@@ -0,0 +1,40 @@
+From 79fa7985df1f77a34d03188f1251fb7aa8efce0c Mon Sep 17 00:00:00 2001
+From: Andrey Gusakov <andrey.gusakov@cogentembedded.com>
+Date: Tue, 19 Apr 2016 15:38:29 +0300
+Subject: [PATCH 2/2] fix termios struct access
+
+
+Signed-off-by: Andrey Gusakov <andrey.gusakov@cogentembedded.com>
+---
+ sllin/sllin.c |   10 +++++-----
+ 1 file changed, 5 insertions(+), 5 deletions(-)
+
+diff --git a/sllin/sllin.c b/sllin/sllin.c
+index b97219e..54aff92 100644
+--- a/sllin/sllin.c
++++ b/sllin/sllin.c
+@@ -210,17 +210,17 @@ static int sltty_change_speed(struct tty_struct *tty, unsigned speed)
+
+	mutex_lock(&tty->termios_mutex);
+
+-	old_termios = *(tty->termios);
++	old_termios = tty->termios;
+
+	cflag = CS8 | CREAD | CLOCAL | HUPCL;
+	cflag &= ~(CBAUD | CIBAUD);
+	cflag |= BOTHER;
+-	tty->termios->c_cflag = cflag;
+-	tty->termios->c_oflag = 0;
+-	tty->termios->c_lflag = 0;
++	tty->termios.c_cflag = cflag;
++	tty->termios.c_oflag = 0;
++	tty->termios.c_lflag = 0;
+
+	/* Enable interrupt when UART-Break or Framing error received */
+-	tty->termios->c_iflag = BRKINT | INPCK;
++	tty->termios.c_iflag = BRKINT | INPCK;
+
+	tty_encode_baud_rate(tty, speed, speed);
+
+--
+1.7.10.4
diff --git a/common/recipes-support/sllin/files/0003-disable-debug-fix-otput-formating.patch b/common/recipes-support/sllin/files/0003-disable-debug-fix-otput-formating.patch
new file mode 100644
index 0000000..3fe0052
--- /dev/null
+++ b/common/recipes-support/sllin/files/0003-disable-debug-fix-otput-formating.patch
@@ -0,0 +1,38 @@
+From 2348a515641bc661570c4d3706149d6814c4f727 Mon Sep 17 00:00:00 2001
+From: Andrey Gusakov <andrey.gusakov@cogentembedded.com>
+Date: Thu, 21 Apr 2016 12:57:07 +0300
+Subject: [PATCH] disable debug, fix otput formating
+
+
+Signed-off-by: Andrey Gusakov <andrey.gusakov@cogentembedded.com>
+---
+ sllin/sllin.c |    6 ++----
+ 1 file changed, 2 insertions(+), 4 deletions(-)
+
+diff --git a/sllin/sllin.c b/sllin/sllin.c
+index 54aff92..9402f54 100644
+--- a/sllin/sllin.c
++++ b/sllin/sllin.c
+@@ -41,8 +41,6 @@
+  * Funded by:  Volkswagen Group Research
+  */
+
+-#define DEBUG			1 /* Enables pr_debug() printouts */
+-
+ #include <linux/module.h>
+ #include <linux/moduleparam.h>
+
+@@ -1442,9 +1440,9 @@ static int __init sllin_init(void)
+	}
+
+ #ifdef BREAK_BY_BAUD
+-	pr_debug("sllin: Break is generated by baud-rate change.");
++	pr_debug("sllin: Break is generated by baud-rate change.\n");
+ #else
+-	pr_debug("sllin: Break is generated manually with tiny sleep.");
++	pr_debug("sllin: Break is generated manually with tiny sleep.\n");
+ #endif
+
+	return status;
+--
+1.7.10.4
diff --git a/common/recipes-support/sllin/sllin_git.bb b/common/recipes-support/sllin/sllin_git.bb
new file mode 100644
index 0000000..775e1d2
--- /dev/null
+++ b/common/recipes-support/sllin/sllin_git.bb
@@ -0,0 +1,35 @@
+SUMMARY = "Linux LIN bus drivers and tools"
+SECTION = "kernel/modules"
+DEPENDS = "virtual/kernel"
+
+LICENSE = "GPLv2"
+LIC_FILES_CHKSUM = "file://sllin.c;md5=ac3527fbbdb552a45de22cc3f56a7fe4"
+
+PN = "sllin"
+PE = "1"
+PV = "0.1"
+
+SRC_URI = "git://rtime.felk.cvut.cz/linux-lin.git \
+	file://0001-cross-compile.patch;striplevel=2 \
+	file://0002-fix-termios-struct-access.patch;striplevel=2 \
+	file://0003-disable-debug-fix-otput-formating.patch;striplevel=2 \
+"
+SRCREV = "5c02d1856f32f8206f467b11cb61faf557c1882f"
+
+S = "${WORKDIR}/git/sllin"
+
+inherit module
+
+EXTRA_OEMAKE = "KPATH=${STAGING_KERNEL_DIR} KLIB=${D}"
+
+do_install() {
+    # Create shared folder
+    install -d ${D}/lib/modules/${KERNEL_VERSION}/tty/
+
+    # Copy kernel module
+    install -m 0644 ${S}/sllin.ko ${D}/lib/modules/${KERNEL_VERSION}/tty/
+}
+
+FILES_kernel-module-${PN} = " \
+    /lib/modules/${KERNEL_VERSION}/tty/sllin.ko \
+"
\ No newline at end of file