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author | Gregory Nutt <gnutt@nuttx.org> | 2013-11-04 08:57:27 -0600 |
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committer | Gregory Nutt <gnutt@nuttx.org> | 2013-11-04 08:57:27 -0600 |
commit | 56d21b36736854d04ad4a82bd30517a46bfb985a (patch) | |
tree | 1280c35028b8a94bf29d52003aa72fdd0b469fb4 | |
parent | 757043087f32159603cd38d5963d5999f540bec8 (diff) | |
download | nuttx-56d21b36736854d04ad4a82bd30517a46bfb985a.tar.gz nuttx-56d21b36736854d04ad4a82bd30517a46bfb985a.tar.bz2 nuttx-56d21b36736854d04ad4a82bd30517a46bfb985a.zip |
SAMA5 CAN: File that I forgot to add in a previous commit
-rw-r--r-- | nuttx/configs/sama5d3x-ek/src/sam_can.c | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/nuttx/configs/sama5d3x-ek/src/sam_can.c b/nuttx/configs/sama5d3x-ek/src/sam_can.c new file mode 100644 index 000000000..241043e3c --- /dev/null +++ b/nuttx/configs/sama5d3x-ek/src/sam_can.c @@ -0,0 +1,140 @@ +/************************************************************************************ + * configs/sama5d3-ek/src/up_can.c + * + * Copyright (C) 2013 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * 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 NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * 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. + * + ************************************************************************************/ + +/************************************************************************************ + * Included Files + ************************************************************************************/ + +#include <nuttx/config.h> + +#include <errno.h> +#include <debug.h> + +#include <nuttx/can.h> +#include <arch/board/board.h> + +#include "chip.h" +#include "up_arch.h" + +#include "sam_can.h" +#include "sama5d3x-ek.h" + +#if defined(CONFIG_CAN) && (defined(CONFIG_SAMA5_CAN0) || defined(CONFIG_SAMA5_CAN1)) + +/************************************************************************************ + * Pre-processor Definitions + ************************************************************************************/ +/* Configuration ********************************************************************/ + +#if defined(CONFIG_SAMA5_CAN0) && defined(CONFIG_SAMA5_CAN1) +# warning "Both CAN0 and CAN1 are enabled. Assuming only CAN0." +# undef CONFIG_SAMA5_CAN1 +#endif + +#ifdef CONFIG_SAMA5_CAN0 +# define CAN_PORT 0 +#else +# define CAN_PORT 1 +#endif + +/* Debug ***************************************************************************/ +/* Non-standard debug that may be enabled just for testing CAN */ + +#ifdef CONFIG_DEBUG_CAN +# define candbg dbg +# define canvdbg vdbg +# define canlldbg lldbg +# define canllvdbg llvdbg +#else +# define candbg(x...) +# define canvdbg(x...) +# define canlldbg(x...) +# define canllvdbg(x...) +#endif + +/************************************************************************************ + * Private Functions + ************************************************************************************/ + +/************************************************************************************ + * Public Functions + ************************************************************************************/ + +/************************************************************************************ + * Name: can_devinit + * + * Description: + * All STM32 architectures must provide the following interface to work with + * examples/can. + * + ************************************************************************************/ + +int can_devinit(void) +{ + static bool initialized = false; + struct can_dev_s *can; + int ret; + + /* Check if we have already initialized */ + + if (!initialized) + { + /* Call stm32_caninitialize() to get an instance of the CAN interface */ + + can = sam_caninitialize(CAN_PORT); + if (can == NULL) + { + candbg("ERROR: Failed to get CAN interface\n"); + return -ENODEV; + } + + /* Register the CAN driver at "/dev/can0" */ + + ret = can_register("/dev/can0", can); + if (ret < 0) + { + candbg("ERROR: can_register failed: %d\n", ret); + return ret; + } + + /* Now we are initialized */ + + initialized = true; + } + + return OK; +} + +#endif /* CONFIG_CAN && (CONFIG_SAMA5_CAN0 || CONFIG_SAMA5_CAN1) */ |