Re: [PATCH v8 4/4] can: Allwinner A10/A20 CAN Controller support - Kernel module

[Maxime Ripard]

On Wed, Sep 16, 2015 at 01:21:22PM +0200, Gerhard Bertelsmann wrote:
> Kernel module for Allwinner A10/A20 CAN
> 
> Signed-off-by: Gerhard Bertelsmann 

Acked-by: Maxime Ripard 

Thanks!
Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com


signature.asc
Description: Digital signature

[PATCH v8 4/4] can: Allwinner A10/A20 CAN Controller support - Kernel module

[Gerhard Bertelsmann]

Kernel module for Allwinner A10/A20 CAN

Signed-off-by: Gerhard Bertelsmann 
---

 drivers/net/can/Kconfig|  10 +
 drivers/net/can/Makefile   |   1 +
 drivers/net/can/sun4i_can.c| 857 +
 3 files changed, 868 insertions(+)


diff --git a/drivers/net/can/Kconfig b/drivers/net/can/Kconfig
index e8c96b8..6d04183 100644
--- a/drivers/net/can/Kconfig
+++ b/drivers/net/can/Kconfig
@@ -129,6 +129,16 @@ config CAN_RCAR
  To compile this driver as a module, choose M here: the module will
  be called rcar_can.
 
+config CAN_SUN4I
+   tristate "Allwinner A10 CAN controller"
+   depends on MACH_SUN4I || MACH_SUN7I || COMPILE_TEST
+   ---help---
+ Say Y here if you want to use CAN controller found on Allwinner
+ A10/A20 SoCs.
+
+ To compile this driver as a module, choose M here: the module will
+ be called sun4i_can.
+
 config CAN_XILINXCAN
tristate "Xilinx CAN"
depends on ARCH_ZYNQ || ARM64 || MICROBLAZE || COMPILE_TEST
diff --git a/drivers/net/can/Makefile b/drivers/net/can/Makefile
index c533c62..1f21cef 100644
--- a/drivers/net/can/Makefile
+++ b/drivers/net/can/Makefile
@@ -27,6 +27,7 @@ obj-$(CONFIG_CAN_FLEXCAN) += flexcan.o
 obj-$(CONFIG_PCH_CAN)  += pch_can.o
 obj-$(CONFIG_CAN_GRCAN)+= grcan.o
 obj-$(CONFIG_CAN_RCAR) += rcar_can.o
+obj-$(CONFIG_CAN_SUN4I)+= sun4i_can.o
 obj-$(CONFIG_CAN_XILINXCAN)+= xilinx_can.o
 
 subdir-ccflags-y += -D__CHECK_ENDIAN__
diff --git a/drivers/net/can/sun4i_can.c b/drivers/net/can/sun4i_can.c
new file mode 100644
index 000..10d8497
--- /dev/null
+++ b/drivers/net/can/sun4i_can.c
@@ -0,0 +1,857 @@
+/*
+ * sun4i_can.c - CAN bus controller driver for Allwinner SUN4I based SoCs
+ *
+ * Copyright (C) 2013 Peter Chen
+ * Copyright (C) 2015 Gerhard Bertelsmann
+ * All rights reserved.
+ *
+ * Parts of this software are based on (derived from) the SJA1000 code by:
+ *   Copyright (C) 2014 Oliver Hartkopp 
+ *   Copyright (C) 2007 Wolfgang Grandegger 
+ *   Copyright (C) 2002-2007 Volkswagen Group Electronic Research
+ *   Copyright (C) 2003 Matthias Brukner, Trajet Gmbh, Rebenring 33,
+ *   38106 Braunschweig, GERMANY
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *notice, this list of conditions and the following disclaimer in the
+ *documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of Volkswagen nor the names of its contributors
+ *may be used to endorse or promote products derived from this software
+ *without specific prior written permission.
+ *
+ * Alternatively, provided that this notice is retained in full, this
+ * software may be distributed under the terms of the GNU General
+ * Public License ("GPL") version 2, in which case the provisions of the
+ * GPL apply INSTEAD OF those given above.
+ *
+ * The provided data structures and external interfaces from this code
+ * are not restricted to be used by modules with a GPL compatible license.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ *
+ */
+
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+
+#define DRV_NAME "sun4i_can"
+
+/* Registers address (physical base address 0x01C2BC00) */
+#define SUN4I_REG_MSEL_ADDR0x  /* CAN Mode Select */
+#define SUN4I_REG_CMD_ADDR 0x0004  /* CAN Command */
+#define SUN4I_REG_STA_ADDR 0x0008  /* CAN Status */
+#define SUN4I_REG_INT_ADDR 0x000c  /* CAN Interrupt Flag */
+#define SUN4I_REG_INTEN_ADDR   0x0010  /* CAN Interrupt Enable */
+#define SUN4I_REG_BTIME_ADDR   0x0014  /* CAN Bus Timing 0 */
+#define SUN4I_REG_TEWL_ADDR0x0018  /*