+/**************************************************************************/
+/* File: sysdep_sysless.c - System-less support routines */
+/* */
+/* 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> */
+/* 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 <cpu_def.h>
+#include <system_def.h>
+#include "./can/can.h"
+#include "./can/can_sysdep.h"
+#include "./can/main.h"
+#include "./can/devcommon.h"
+#include "./can/setup.h"
+#include "./can/finish.h"
+
+#ifndef IRQF_SHARED
+#define IRQF_SHARED 0
+#endif /*IRQF_SHARED*/
+
+IRQ_HANDLER_FNC(can_default_irq_dispatch);
+
+/**
+ * can_request_io_region - request IO space region
+ * @start: the first IO port address
+ * @n: number of the consecutive IO port addresses
+ * @name: name/label for the requested region
+ *
+ * The function hides system specific implementation of the feature.
+ *
+ * Return Value: returns positive value (1) in the case, that region could
+ * be reserved for the driver. Returns zero (0) if there is collision with
+ * other driver or region cannot be taken for some other reason.
+ */
+int can_request_io_region(unsigned long start, unsigned long n, const char *name)
+{
+ return 1;
+}
+
+/**
+ * can_release_io_region - release IO space region
+ * @start: the first IO port address
+ * @n: number of the consecutive IO port addresses
+ */
+void can_release_io_region(unsigned long start, unsigned long n)
+{
+}
+
+/**
+ * can_request_mem_region - request memory space region
+ * @start: the first memory port physical address
+ * @n: number of the consecutive memory port addresses
+ * @name: name/label for the requested region
+ *
+ * The function hides system specific implementation of the feature.
+ *
+ * Return Value: returns positive value (1) in the case, that region could
+ * be reserved for the driver. Returns zero (0) if there is collision with
+ * other driver or region cannot be taken for some other reason.
+ */
+int can_request_mem_region(unsigned long start, unsigned long n, const char *name)
+{
+ return 1;
+}
+
+/**
+ * can_release_mem_region - release memory space region
+ * @start: the first memory port physical address
+ * @n: number of the consecutive memory port addresses
+ */
+void can_release_mem_region(unsigned long start, unsigned long n)
+{
+ return;
+}
+
+
+/**
+ * can_default_irq_dispatch - the first level interrupt dispatch handler
+ * @irq: interrupt vector number, this value is system specific
+ * @dev_id: driver private pointer registered at time of request_irq() call.
+ * The CAN driver uses this pointer to store relationship of interrupt
+ * to chip state structure - @struct canchip_t
+ * @regs: system dependent value pointing to registers stored in exception frame
+ *
+ * File: src/setup.c
+ */
+IRQ_HANDLER_FNC(can_default_irq_dispatch)
+{
+ int retval;
+ struct canchip_t *chip;
+
+ chip = (struct canchip_t*)irq_handler_get_context();
+
+ retval=chip->chipspecops->irq_handler(0, chip);
+ return CAN_IRQ_RETVAL(retval);
+}
+
+/**
+ * can_chip_setup_irq - attaches chip to the system interrupt processing
+ * @chip: pointer to CAN chip structure
+ *
+ * Return Value: returns negative number in the case of fail
+ */
+int can_chip_setup_irq(struct canchip_t *chip)
+{
+ if(chip==NULL)
+ return -1;
+ if(!chip->chipspecops->irq_handler)
+ return 0;
+ if(chip->flags & CHIP_IRQ_CUSTOM)
+ return 1;
+
+ if (request_irq(chip->chip_irq,can_default_irq_dispatch,IRQF_SHARED,DEVICE_NAME,chip))
+ return -1;
+ else {
+ DEBUGMSG("Registered interrupt %d\n",chip->chip_irq);
+ chip->flags |= CHIP_IRQ_SETUP;
+ }
+ return 1;
+}
+
+
+/**
+ * can_chip_free_irq - unregisters chip interrupt handler from the system
+ * @chip: pointer to CAN chip structure
+ */
+void can_chip_free_irq(struct canchip_t *chip)
+{
+ if((chip->flags & CHIP_IRQ_SETUP) && (chip->chip_irq>=0)) {
+ if(chip->flags & CHIP_IRQ_CUSTOM)
+ return;
+
+ free_irq(chip->chip_irq, chip);
+ chip->flags &= ~CHIP_IRQ_SETUP;
+ }
+}
+
projects / lincan.git / commitdiff