pcan_sja1000_rt.c

linux下的CAN BUS驱动代码。适合在arm平台使用。

//****************************************************************************
// Copyright (C) 2001-2007  PEAK System-Technik GmbH
//
// [e-mail]
// www.peak-system.com
//
// 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.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
//
// Maintainer(s): Klaus Hitschler ([e-mail])
//
// Major contributions by:
//                Edouard Tisserant ([e-mail]) XENOMAI
//                Laurent Bessard   ([e-mail])   XENOMAI
//                Oliver Hartkopp   ([e-mail]) socketCAN
//
//****************************************************************************

//****************************************************************************
//
// pcan_sja1000_rt.c - all about sja1000 init and data handling
//
// $Id: pcan_sja1000_rt.c $
//
//****************************************************************************

//****************************************************************************
// DEFINES

#define SJA1000_IRQ_HANDLED RTDM_IRQ_HANDLED
#define SJA1000_IRQ_NONE RTDM_IRQ_NONE

#define SJA1000_METHOD_ARGS struct pcandev *dev, struct pcanctx_rt *ctx

#define SJA1000_LOCK_IRQSAVE(type) {rtdm_lockctx_t lockctx;\
                                 rtdm_lock_get_irqsave(&ctx->type, lockctx)
#define SJA1000_UNLOCK_IRQRESTORE(type) rtdm_lock_put_irqrestore(&ctx->type, lockctx);}

#define SJA1000_WAKEUP_READ() rtdm_event_signal(&ctx->in_event)
#define SJA1000_WAKEUP_WRITE() rtdm_event_signal(&ctx->out_event)
#define SJA1000_WAKEUP_EMPTY() if(result == -ENODATA)\
                                  rtdm_event_signal(&ctx->empty_event)

#define SJA1000_FUNCTION_CALL(name) name(dev,ctx)

//****************************************************************************
// CODE

int sja1000_irqhandler_rt(rtdm_irq_t *irq_context)
{
  struct pcanctx_rt *ctx;
  struct pcandev *dev;

  ctx = rtdm_irq_get_arg(irq_context, struct pcanctx_rt);
  dev = ctx->dev;

  return sja1000_irqhandler_common(dev, ctx);
}