-/* sja1000.c
- * Linux CAN-bus device driver.
- * Written by Arnaud Westenberg email:arnaud@wanadoo.nl
- * Changed for PeliCan mode SJA1000 by Tomasz Motylewski (BFAD GmbH)
- * T.Motylewski@bfad.de
- * Rewritten for new CAN queues by Pavel Pisa - OCERA team member
- * email:pisa@cmp.felk.cvut.cz
- * This software is released under the GPL-License.
- * Version lincan-0.3 17 Jun 2004
- */
+/**************************************************************************/
+/* File: sja1000p.c - Philips/NXP SJA1000 chip PeliCanCAN mode support */
+/* */
+/* LinCAN - (Not only) Linux CAN bus driver */
+/* Copyright (C) 2002-2009 DCE FEE CTU Prague <http://dce.felk.cvut.cz> */
+/* Copyright (C) 2002-2009 Pavel Pisa <pisa@cmp.felk.cvut.cz> */
+/* Copyright (C) 2004-2005 Tomasz Motylewski (BFAD GmbH) */
+/* Funded by OCERA and FRESCOR IST projects */
+/* Based on CAN driver code by Arnaud Westenberg <arnaud@wanadoo.nl> */
+/* */
+/* LinCAN is free software; you can redistribute it and/or modify it */
+/* under terms of the GNU General Public License as published by the */
+/* Free Software Foundation; either version 2, or (at your option) any */
+/* later version. LinCAN 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 LinCAN; see file */
+/* COPYING. If not, write to the Free Software Foundation, 675 Mass Ave, */
+/* Cambridge, MA 02139, USA. */
+/* */
+/* To allow use of LinCAN in the compact embedded systems firmware */
+/* and RT-executives (RTEMS for example), main authors agree with next */
+/* special exception: */
+/* */
+/* Including LinCAN header files in a file, instantiating LinCAN generics */
+/* or templates, or linking other files with LinCAN objects to produce */
+/* an application image/executable, does not by itself cause the */
+/* resulting application image/executable to be covered by */
+/* the GNU General Public License. */
+/* This exception does not however invalidate any other reasons */
+/* why the executable file might be covered by the GNU Public License. */
+/* Publication of enhanced or derived LinCAN files is required although. */
+/**************************************************************************/
#include "./can/can.h"
#include "./can/can_sysdep.h"
return 0;
}
+
+/**
+ * sja1000p_set_bittiming: - set bittiming according to already computed parameters.
+ * @chip: pointer to chip state structure
+ * @bpr: baud rate prescaler
+ * @sjw: synchronization jump width in bittime quanta
+ * @tseg1: length of the segment 1 in bittime quanta
+ * @tseg2: length of the segment 2 in bittime quanta
+ *
+ * Return Value: negative value reports error.
+ * File: src/sja1000p.c
+ */
+int sja1000p_set_bittiming(struct canchip_t *chip, int brp, int sjw, int tseg1, int tseg2)
+{
+ uint8_t sam3times = 0; /* 0 = the bus is sampled once */
+
+ if((--brp)<0)
+ return -EINVAL;
+
+ if((--sjw)<0)
+ return -EINVAL;
+
+ if((--tseg1)<0)
+ return -EINVAL;
+
+ if((--tseg2)<0)
+ return -EINVAL;
+
+
+
+ if (sja1000p_enable_configuration(chip))
+ return -ENODEV;
+
+ can_write_reg(chip, sjw<<6 | brp, SJABTR0);
+ can_write_reg(chip, (sam3times<<7) | (tseg2<<4) | tseg1, SJABTR1);
+
+ sja1000p_disable_configuration(chip);
+
+ return 0;
+}
+
+/**
+ * sja1000p_get_bittiming_const: - obtain description of chip bittiming calculation.
+ * @chip: pointer to chip state structure
+ * @btc: pointer to the structure filled by data
+ *
+ * Return Value: negative value reports error.
+ * File: src/sja1000p.c
+ */
+int sja1000p_get_bittiming_const(struct canchip_t *chip, struct can_bittiming_const *btc)
+{
+ btc->tseg1_min = 1;
+ btc->tseg1_max = 16; /* sjaMAX_TSEG1+1 */
+ btc->tseg2_min = 1;
+ btc->tseg2_max = 8; /* sjaMAX_TSEG2+1 */
+ btc->sjw_max = 4;
+ btc->brp_min = 1;
+ btc->brp_max = 64;
+ btc->brp_inc = 1;
+
+ return 0;
+}
+
+
/**
* sja1000p_read: - reads and distributes one or more received messages
* @chip: pointer to chip state structure
chipspecops->stop_chip=sja1000p_stop_chip;
chipspecops->irq_handler=sja1000p_irq_handler;
chipspecops->irq_accept=NULL;
+ chipspecops->set_bittiming=sja1000p_set_bittiming;
+ chipspecops->get_bittiming_const=sja1000p_get_bittiming_const;
return 0;
}