From: Srinivas Kandagatla srinivas.kandaga...@st.com
This patch adds support to ASC (asynchronous serial controller)
driver, which is basically a standard serial driver. This IP is common
across all the ST parts for settop box platforms.
ASC is embedded in ST COMMS IP block. It supports Rx Tx functionality.
It support all industry standard baud rates.
Signed-off-by: Srinivas Kandagatla srinivas.kandaga...@st.com
CC: Stephen Gallimore stephen.gallim...@st.com
CC: Stuart Menefy stuart.men...@st.com
CC: Arnd Bergmann a...@arndb.de
CC: Greg Kroah-Hartman gre...@linuxfoundation.org
---
Hi Greg,
This patch is the part of the driver support for Sti SOCs.
This patch undergone 3-4 cycles of review in arm-kernel mailing list.
As Arnd prefered to take only SOC support patches via arm-soc, Am
sending this patch seperately.
If its not too late, can you consider this patch for 3.11 via tty tree?
Thanks,
srini
Changes since v4:
- rebased with tty-next branch from git.kernel.org tty repo.
Changes since v3:
- None.
Changes since v2:
- st-asc driver made POSIX compatible based on Russell K comment.
Changes since RFC:
- modified kconfig to remove default y
- removed all the forward declaration.
- use dynamic major numbering.
- merge header-file in to driver.
.../devicetree/bindings/tty/serial/st-asc.txt | 18 +
drivers/tty/serial/Kconfig | 16 +
drivers/tty/serial/Makefile|1 +
drivers/tty/serial/st-asc.c| 939
include/uapi/linux/serial_core.h |3 +
5 files changed, 977 insertions(+), 0 deletions(-)
create mode 100644 Documentation/devicetree/bindings/tty/serial/st-asc.txt
create mode 100644 drivers/tty/serial/st-asc.c
diff --git a/Documentation/devicetree/bindings/tty/serial/st-asc.txt
b/Documentation/devicetree/bindings/tty/serial/st-asc.txt
new file mode 100644
index 000..75d877f
--- /dev/null
+++ b/Documentation/devicetree/bindings/tty/serial/st-asc.txt
@@ -0,0 +1,18 @@
+*st-asc(Serial Port)
+
+Required properties:
+- compatible : Should be st,asc.
+- reg, reg-names, interrupts, interrupt-names : Standard way to define device
+ resources with names. look in
+ Documentation/devicetree/bindings/resource-names.txt
+
+Optional properties:
+- st,hw-flow-ctrl bool flag to enable hardware flow control.
+- st,force-m1 bool flat to force asc to be in Mode-1 recommeded
+ for high bit rates (above 19.2K)
+Example:
+serial@fe44{
+compatible= st,asc;
+reg = 0xfe44 0x2c;
+interrupts = 0 209 0;
+};
diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index 46dd1c7..4e0a3a6 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -1497,6 +1497,22 @@ config SERIAL_FSL_LPUART_CONSOLE
If you have enabled the lpuart serial port on the Freescale SoCs,
you can make it the console by answering Y to this option.
+config SERIAL_ST_ASC
+ tristate ST ASC serial port support
+ select SERIAL_CORE
+ help
+ This driver is for the on-chip Asychronous Serial Controller on
+ STMicroelectronics STi SoCs.
+ ASC is embedded in ST COMMS IP block. It supports Rx Tx
functionality.
+ It support all industry standard baud rates.
+
+ If unsure, say N.
+
+config SERIAL_ST_ASC_CONSOLE
+ bool Support for console on ST ASC
+ depends on SERIAL_ST_ASC=y
+ select SERIAL_CORE_CONSOLE
+
endmenu
endif # TTY
diff --git a/drivers/tty/serial/Makefile b/drivers/tty/serial/Makefile
index cf650f0..47b679c 100644
--- a/drivers/tty/serial/Makefile
+++ b/drivers/tty/serial/Makefile
@@ -65,6 +65,7 @@ obj-$(CONFIG_SERIAL_KGDB_NMI) += kgdb_nmi.o
obj-$(CONFIG_SERIAL_KS8695) += serial_ks8695.o
obj-$(CONFIG_SERIAL_OMAP) += omap-serial.o
obj-$(CONFIG_SERIAL_ALTERA_UART) += altera_uart.o
+obj-$(CONFIG_SERIAL_ST_ASC) += st-asc.o
obj-$(CONFIG_KGDB_SERIAL_CONSOLE) += kgdboc.o
obj-$(CONFIG_SERIAL_QE) += ucc_uart.o
obj-$(CONFIG_SERIAL_TIMBERDALE)+= timbuart.o
diff --git a/drivers/tty/serial/st-asc.c b/drivers/tty/serial/st-asc.c
new file mode 100644
index 000..5edf82f
--- /dev/null
+++ b/drivers/tty/serial/st-asc.c
@@ -0,0 +1,939 @@
+/*
+ * st-asc.c: ST Asynchronous serial controller (ASC) driver
+ *
+ * Copyright (C) 2003-2013 STMicroelectronics (RD) Limited
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ */
+
+#if defined(CONFIG_SERIAL_ST_ASC_CONSOLE) defined(CONFIG_MAGIC_SYSRQ)
+#define SUPPORT_SYSRQ
+#endif
+
+#include linux/module.h
+#include linux/serial.h
+#include linux/console.h
+#include
