--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/drivers/can_copcican_comedi/can_copcican_comedi.c Fri Nov 12 22:24:06 2010 +0100
@@ -0,0 +1,490 @@
+/*
+This file is part of CanFestival, a library implementing CanOpen Stack.
+
+Copyright (C): Cosateq GmbH & Co.KG
+ http://www.cosateq.com/
+ http://www.scale-rt.com/
+
+See COPYING file for copyrights details.
+
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version.
+
+This library 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
+Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with this library; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+*/
+
+/*
+ COMEDI interface for CO-PCICAN card.
+*/
+
+#include <linux/module.h>
+#include <linux/comedi.h>
+#include <linux/comedilib.h>
+
+#define NEED_PRINT_MESSAGE
+#include "can_driver.h"
+#include "def.h"
+#include "co_pcicanops.h"
+
+MODULE_LICENSE("GPL");
+
+/* at the moment not threadsafe :-( */
+static unsigned char selectedChannelRx = 0, selectedChannelTx = 0;
+
+static int rt_strcmp( const char *src, const char *dst )
+{
+ int ret = 0;
+
+ while( ! (ret = *(unsigned char *)src - *(unsigned char *)dst) && *dst)
+ {
+ src++;
+ dst++;
+ }
+
+ if( ret < 0 )
+ {
+ ret = -1 ;
+ }
+ else
+ {
+ if( ret > 0 )
+ ret = 1 ;
+ }
+
+ return ret;
+}
+
+static int TranslateBaudRate( char* optarg )
+{
+ /* values see documentation of CO-PCICAN */
+ if( !rt_strcmp( optarg, "1M" ) ) return 0;
+ if( !rt_strcmp( optarg, "800K" ) ) return 1;
+ if( !rt_strcmp( optarg, "500K" ) ) return 2;
+ if( !rt_strcmp( optarg, "250K" ) ) return 3;
+ if( !rt_strcmp( optarg, "125K" ) ) return 4;
+ if( !rt_strcmp( optarg, "100K" ) ) return 5;
+ if( !rt_strcmp( optarg, "83.3K" ) ) return 6;
+ if( !rt_strcmp( optarg, "10K" ) ) return 7;
+
+ return -1;
+}
+
+/*********CO-PCICAN specific functions to communicate with the board**********/
+typedef struct
+{
+ char used;
+ CAN_HANDLE fd;
+ void* receiveTask;
+ void* d;
+} CANPort; /* taken from drivers/unix.c */
+
+comedi_t* get_dev_of_port( CAN_PORT port )
+{
+ CANPort *thisPort = (CANPort*)port;
+ CAN_HANDLE thisHandle;
+ comedi_t *dev;
+
+ if( thisPort == NULL )
+ {
+ MSG("can_copcican_comedi: get_dev_of_port(): thisPort is NULL\n");
+ return NULL;
+ }
+
+ thisHandle = thisPort->fd;
+
+ if( thisHandle == NULL )
+ {
+ MSG("can_copcican_comedi: get_dev_of_port(): thisHandle is NULL\n");
+ return NULL;
+ }
+
+ dev = (comedi_t*)thisHandle;
+
+ /*MSG("can_copcican_comedi: get_dev_of_port(): handle is 0x%08x\n", (unsigned int)dev);*/
+
+ return dev;
+}
+
+int co_pcican_enter_run_mode( comedi_t *dev )
+{
+ unsigned int opcmd[15];
+ unsigned int opcode = CMDQ_OPC_ENTER_RUN_MODE;
+ comedi_insn insn;
+
+ if( dev == NULL )
+ {
+ MSG("can_copcican_comedi: co_pcican_enter_run_mode(): dev is NULL\n");
+ return 1;
+ }
+
+ memset( opcmd, 0x00, sizeof(opcmd) );
+ opcmd[0] = 0;
+
+ memset( &insn, 0x00, sizeof(insn) );
+ insn.insn = INSN_CONFIG;
+ insn.n = 1;
+ insn.data = (void*)opcmd;
+ insn.subdev = 0;
+ insn.unused[0] = opcode; /* in use for CO-PCICAN */
+
+ comedi_do_insn( dev, &insn );
+
+ opcmd[0] = 2;
+ insn.subdev = 2;
+ insn.unused[0] = opcode; /* in use for CO-PCICAN */
+
+ return comedi_do_insn( dev, &insn );
+}
+
+int co_pcican_enter_config_mode( comedi_t *dev )
+{
+ unsigned int opcmd[15];
+ unsigned int opcode = CMDQ_OPC_ENTER_CONFIG_MODE;
+ comedi_insn insn;
+
+ if( dev == NULL )
+ {
+ MSG("can_copcican_comedi: co_pcican_enter_config_mode(): dev is NULL\n");
+ return 1;
+ }
+
+ memset( opcmd, 0x00, sizeof(opcmd) );
+ opcmd[0] = 0;
+
+ memset( &insn, 0x00, sizeof(insn) );
+ insn.insn = INSN_CONFIG;
+ insn.n = 1;
+ insn.data = (void*)opcmd;
+ insn.subdev = 0;
+ insn.unused[0] = opcode; /* in use for CO-PCICAN */
+
+ comedi_do_insn( dev, &insn );
+
+ opcmd[0] = 2;
+ insn.subdev = 2;
+ insn.unused[0] = opcode; /* in use for CO-PCICAN */
+
+ return comedi_do_insn( dev, &insn );
+}
+
+int co_pcican_select_channel( const unsigned char channel, const unsigned int direction )
+{
+ if( channel >= NUM_CAN_CHANNELS )
+ {
+ MSG("can_copcican_comedi: co_pcican_select_channel(): invalid channel\n");
+ return -1;
+ }
+
+ /* at the moment not threadsafe :-( */
+ switch( direction )
+ {
+ case RX: selectedChannelRx = channel;
+ break;
+ case TX: selectedChannelTx = channel;
+ break;
+ default: return -1;
+ }
+
+ return 0;
+}
+
+int co_pcican_configure_selected_channel( comedi_t *dev, s_BOARD *board, const unsigned int direction )
+{
+ unsigned int opcmd[15];
+ unsigned int opcode = CMDQ_OPC_SET_CONFIG_CHANNEL;
+ unsigned int selectedChannel;
+ comedi_insn insn;
+
+ if( dev == NULL )
+ {
+ MSG("can_copcican_comedi: co_pcican_configure_selected_channel(): dev is NULL\n");
+ return -1;
+ }
+
+ if( board == NULL )
+ {
+ MSG("can_copcican_comedi: co_pcican_configure_selected_channel(): board is NULL\n");
+ return -1;
+ }
+
+ if( board->baudrate == NULL )
+ {
+ MSG("can_copcican_comedi: co_pcican_configure_selected_channel(): baudrate is NULL\n");
+ return -1;
+ }
+
+ switch( direction )
+ {
+ case RX: selectedChannel = selectedChannelRx;
+ break;
+ case TX: selectedChannel = selectedChannelTx;
+ break;
+ default: selectedChannel = 0xff;
+ }
+
+ if( selectedChannel >= NUM_CAN_CHANNELS )
+ {
+ MSG("can_copcican_comedi: co_pcican_configure_selected_channel(): invalid channel selected\n");
+ return -1;
+ }
+
+ memset( opcmd, 0x00, sizeof(opcmd) );
+ opcmd[0] = selectedChannel;
+ opcmd[1] = TranslateBaudRate( board->baudrate );
+
+ memset( &insn, 0x00, sizeof(insn) );
+ insn.insn = INSN_CONFIG;
+ insn.n = 1;
+ insn.data = (void*)opcmd;
+
+ if( selectedChannel < 2 )
+ insn.subdev = 0;
+ else
+ insn.subdev = 2;
+
+ insn.unused[0] = opcode; /* in use for CO-PCICAN */
+
+ return comedi_do_insn( dev, &insn );
+}
+
+/*********functions which permit to communicate with the board****************/
+UNS8 canReceive_driver( CAN_HANDLE fd0, Message *m )
+{
+ MESSAGE_T canmsg;
+ comedi_insn insn;
+ UNS8 ret = 0;
+ comedi_t *dev = (comedi_t*)fd0;
+
+ if( dev == NULL )
+ {
+ MSG("can_copcican_comedi: canReceive_driver(): dev is NULL\n");
+ return 1;
+ }
+
+ if( selectedChannelRx >= NUM_CAN_CHANNELS )
+ {
+ MSG("can_copcican_comedi: canReceive_driver(): invalid channel selected\n");
+ return 1;
+ }
+
+ if( m == NULL )
+ {
+ MSG("can_copcican_comedi: canReceive_driver(): message is NULL\n");
+ return 1;
+ }
+
+ memset( &canmsg, 0x00, sizeof(MESSAGE_T) );
+
+ memset( &insn, 0x00, sizeof(insn) );
+ insn.insn = INSN_READ;
+ insn.n = 1;
+ insn.data = (void*)&canmsg;
+
+ if( selectedChannelRx < 2 )
+ insn.subdev = comedi_find_subdevice_by_type(dev, COMEDI_SUBD_DI, 0);
+ else
+ insn.subdev = comedi_find_subdevice_by_type(dev, COMEDI_SUBD_DI, 2);
+
+ insn.unused[1] = selectedChannelRx; /* in use for CO-PCICAN */
+ insn.unused[2] = sizeof(MESSAGE_T); /* in use for CO-PCICAN */
+
+ comedi_do_insn( dev, &insn );
+
+ if( canmsg.timestamp_lo == 0 )
+ {
+ memset( m, 0x00, sizeof(Message) );
+
+ m->cob_id = 0xffff; /* set to invalid so nothing happens */
+ }
+ else
+ {
+ m->len = canmsg.size;
+ m->cob_id = canmsg.id;
+ m->rtr = canmsg.type & MSG_RTR;
+
+ if( !m->rtr )
+ {
+ /* this is for safety */
+ if( m->len > 8 )
+ m->len = 8;
+
+ memcpy( m->data, canmsg.data, m->len);
+ }
+ }
+
+ return ret;
+}
+
+/***************************************************************************/
+UNS8 canSend_driver( CAN_HANDLE fd0, Message *m )
+{
+ MESSAGE_T canmsg;
+ comedi_insn insn;
+ UNS8 ret = 0;
+ comedi_t *dev = (comedi_t*)fd0;
+
+ if( dev == NULL )
+ {
+ MSG("can_copcican_comedi: canSend_driver(): dev is NULL\n");
+ return 1;
+ }
+
+ if( selectedChannelTx >= NUM_CAN_CHANNELS )
+ {
+ MSG("can_copcican_comedi: canSend_driver(): invalid channel selected\n");
+ return 1;
+ }
+
+ if( m == NULL )
+ {
+ MSG("can_copcican_comedi: canSend_driver(): message is NULL\n");
+ return 1;
+ }
+
+ memset( &canmsg, 0x00, sizeof(MESSAGE_T) );
+ canmsg.size = m->len;
+ canmsg.id = m->cob_id;
+
+ if( canmsg.id >= 0x800 )
+ canmsg.type |= MSG_EXT;
+
+ if( m->rtr )
+ {
+ canmsg.type |= MSG_RTR;
+ }
+ else
+ {
+ /* this is for safety */
+ if( canmsg.size > 8 )
+ canmsg.size = 8;
+
+ memcpy( canmsg.data, m->data, canmsg.size);
+ }
+
+ memset( &insn, 0x00, sizeof(insn) );
+ insn.insn = INSN_WRITE;
+ insn.n = 1;
+ insn.data = (void*)&canmsg;
+
+ if( selectedChannelTx < 2 )
+ insn.subdev = comedi_find_subdevice_by_type(dev, COMEDI_SUBD_DO, 0);
+ else
+ insn.subdev = comedi_find_subdevice_by_type(dev, COMEDI_SUBD_DO, 2);
+
+ insn.unused[1] = selectedChannelTx; /* in use for CO-PCICAN */
+ insn.unused[2] = sizeof(MESSAGE_T) - sizeof(unsigned long); /* in use for CO-PCICAN, no timestamp for tx */
+
+ if( comedi_do_insn( dev, &insn ) < 0 )
+ ret = 1;
+
+ return ret;
+}
+
+/***************************************************************************/
+CAN_HANDLE canOpen_driver( s_BOARD *board )
+{
+ comedi_t *dev;
+
+ if( board == NULL )
+ {
+ MSG("can_copcican_comedi: canOpen_driver(): board is NULL\n");
+ return NULL;
+ }
+
+ if( board->busname == NULL )
+ {
+ MSG("can_copcican_comedi: canOpen_driver(): busname is NULL\n");
+ return NULL;
+ }
+
+ dev = comedi_open( board->busname );
+
+ /*MSG("can_copcican_comedi: canOpen_driver(): handle is 0x%08x\n", (unsigned int)dev);*/
+
+ return dev;
+}
+
+/***************************************************************************/
+int canClose_driver( CAN_HANDLE fd0 )
+{
+ comedi_t *dev = (comedi_t*)fd0;
+
+ if( dev == NULL )
+ {
+ MSG("can_copcican_comedi: canClose_driver(): dev is NULL\n");
+ return 1;
+ }
+
+ comedi_close( dev );
+
+ selectedChannelRx = 0;
+ selectedChannelTx = 0;
+
+ return 0;
+}
+
+/***************************************************************************/
+UNS8 canChangeBaudRate_driver( CAN_HANDLE fd0, char* baud )
+{
+ s_BOARD board;
+ UNS8 ret = 0;
+ comedi_t *dev = (comedi_t*)fd0;
+
+ if( dev == NULL )
+ {
+ MSG("can_copcican_comedi: canChangeBaudRate_driver(): dev is NULL\n");
+ return 1;
+ }
+
+ if( baud == NULL )
+ {
+ MSG("can_copcican_comedi: canChangeBaudRate_driver(): baud is NULL\n");
+ return 1;
+ }
+
+ memset( &board, 0x00, sizeof(s_BOARD) );
+ board.baudrate = baud;
+
+ if( co_pcican_configure_selected_channel( dev, &board, RX ) < 0 )
+ ret = 1;
+
+ if( co_pcican_configure_selected_channel( dev, &board, TX ) < 0 )
+ ret = 1;
+
+ return ret;
+}
+
+static int init(void)
+{
+ printk("can_copcican_comedi for CanFestival loaded\n");
+
+ return 0;
+}
+
+static void exit(void)
+{
+ printk("can_copcican_comedi unloaded\n");
+}
+
+module_init(init);
+module_exit(exit);
+
+EXPORT_SYMBOL(get_dev_of_port);
+EXPORT_SYMBOL(co_pcican_enter_run_mode);
+EXPORT_SYMBOL(co_pcican_enter_config_mode);
+EXPORT_SYMBOL(co_pcican_select_channel);
+EXPORT_SYMBOL(co_pcican_configure_selected_channel);
+EXPORT_SYMBOL(canOpen_driver);
+EXPORT_SYMBOL(canClose_driver);
+EXPORT_SYMBOL(canSend_driver);
+EXPORT_SYMBOL(canReceive_driver);
+EXPORT_SYMBOL(canChangeBaudRate_driver);