From 7165d52f1d274e56fbda47fa1e93976ae4e67a9b Mon Sep 17 00:00:00 2001 From: Pavel Pisa Date: Mon, 13 Feb 2012 18:02:45 +0100 Subject: [PATCH] embedded: provide generic support functions for sysless variant. Signed-off-by: Pavel Pisa --- embedded/app/usbcan/Makefile.omk | 4 +- embedded/app/usbcan/sysdep_sysless.c | 164 +++++++++++++++++++++++++++ 2 files changed, 167 insertions(+), 1 deletion(-) create mode 100644 embedded/app/usbcan/sysdep_sysless.c diff --git a/embedded/app/usbcan/Makefile.omk b/embedded/app/usbcan/Makefile.omk index 3077876..723e157 100644 --- a/embedded/app/usbcan/Makefile.omk +++ b/embedded/app/usbcan/Makefile.omk @@ -19,7 +19,9 @@ INCLUDES += -I. #include_HEADERS = ul_idstr.h bin_PROGRAMS = usbcan -usbcan_SOURCES = main.c can_queue.c sja1000p.c devcommon.c setup.c finish.c usb_vend.c can_quesysless.c lpc17xx_can.c +usbcan_SOURCES = main.c can_queue.c sja1000p.c devcommon.c setup.c finish.c +usbcan_SOURCES += usb_vend.c can_quesysless.c sysdep_sysless.c +usbcan_SOURCES += lpc17xx_can.c #usbcan_SOURCES += can_lpcbusemu.c ul_usb1.c #usbtest_SOURCES += ul_idstr.c diff --git a/embedded/app/usbcan/sysdep_sysless.c b/embedded/app/usbcan/sysdep_sysless.c new file mode 100644 index 0000000..40ad822 --- /dev/null +++ b/embedded/app/usbcan/sysdep_sysless.c @@ -0,0 +1,164 @@ +/**************************************************************************/ +/* File: sysdep_sysless.c - System-less support routines */ +/* */ +/* LinCAN - (Not only) Linux CAN bus driver */ +/* Copyright (C) 2002-2009 DCE FEE CTU Prague */ +/* Copyright (C) 2002-2009 Pavel Pisa */ +/* Funded by OCERA and FRESCOR IST projects */ +/* Based on CAN driver code by Arnaud Westenberg */ +/* */ +/* 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 +#include +#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; + } +} + -- 2.39.2