X-Git-Url: http://rtime.felk.cvut.cz/gitweb/lincan.git/blobdiff_plain/76c47d35c22c9c3b38dcfd2515accd3ac1b85f7c..HEAD:/lincan/src/main.c diff --git a/lincan/src/main.c b/lincan/src/main.c index 92d7966..c2c8b1e 100644 --- a/lincan/src/main.c +++ b/lincan/src/main.c @@ -1,18 +1,41 @@ -/* main.c - * Linux CAN-bus device driver. - * Written by Arnaud Westenberg email:arnaud@wanadoo.nl - * 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: main.c - the CAN driver top level glue code (needs rewrite) */ +/* */ +/* 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. */ +/**************************************************************************/ #ifndef EXPORT_SYMTAB #define EXPORT_SYMTAB #endif -#include - #include #include @@ -20,10 +43,10 @@ #include #include #include -#include #include #if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,0)) + #include #include #else #include @@ -38,7 +61,7 @@ #endif #endif -#if !defined (__GENKSYMS__) +#if !defined (__GENKSYMS__) #if (defined (MODVERSIONS) && !defined(NOVER)) #include /*#include "../include/main.ver"*/ @@ -76,46 +99,76 @@ can_spinlock_t canuser_manipulation_lock; -/* Module parameters, some must be supplied at module loading time */ int major=CAN_MAJOR; -MODULE_PARM(major,"1i"); -MODULE_PARM_DESC(major,"can be used to change default major [" __MODULE_STRING(CAN_MAJOR) "]"); int minor[MAX_TOT_CHIPS]={-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1}; +int extended=0; +int pelican=0; +int baudrate[MAX_TOT_CHIPS]; +char *hw[MAX_HW_CARDS]={NULL,}; +int irq[MAX_IRQ]={-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1}; +unsigned long io[MAX_HW_CARDS]={-1,-1,-1,-1,-1,-1,-1,-1}; +long clockfreq[MAX_HW_CARDS]; +int stdmask=0; +int extmask=0; +int mo15mask=0; +int processlocal=0; + +unsigned int minor_specified; +unsigned int baudrate_specified; +unsigned int hw_specified; +unsigned int irq_specified; +unsigned int io_specified; +unsigned int clockfreq_specified; + +#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,12)) +/* Module parameters, some must be supplied at module loading time */ +MODULE_PARM(major,"1i"); /*MODULE_PARM(minor, "1-" __MODULE_STRING(MAX_TOT_CHIPS)"i");*/ MODULE_PARM(minor, "1-" __MODULE_STRING(MAX_TOT_CHIPS_STR)"i"); -MODULE_PARM_DESC(minor,"can be used to change default starting minor for each channel"); -int extended=0; MODULE_PARM(extended,"1i"); +MODULE_PARM(pelican,"1i"); +MODULE_PARM(baudrate, "1-" __MODULE_STRING(MAX_TOT_CHIPS_STR)"i"); +MODULE_PARM(hw, "1-" __MODULE_STRING(MAX_HW_CARDS)"s"); +MODULE_PARM(irq, "1-" __MODULE_STRING(MAX_IRQ)"i"); +MODULE_PARM(io, "1-" __MODULE_STRING(MAX_HW_CARDS)"i"); +MODULE_PARM(clockfreq, "1-" __MODULE_STRING(MAX_HW_CARDS)"i"); +MODULE_PARM(stdmask, "1i"); +MODULE_PARM(extmask, "1i"); +MODULE_PARM(mo15mask, "1i"); +MODULE_PARM(processlocal, "1i"); + +#else /* LINUX_VERSION_CODE >= 2,6,12 */ +module_param(major, int, 0); +module_param_array(minor, int, &minor_specified, 0); +module_param(extended, int, 0); +module_param(pelican, int, 0); +module_param_array(baudrate, int, &baudrate_specified, 0); +module_param_array(hw, charp, &hw_specified, 0); +module_param_array(irq, int, &irq_specified, 0); +module_param_array(io, ulong, &io_specified, 0); +module_param_array(clockfreq, long, &clockfreq_specified, 0); +module_param(stdmask, int, 0); +module_param(extmask, int, 0); +module_param(mo15mask, int, 0); +module_param(processlocal, int, 0); +#endif /* LINUX_VERSION_CODE >= 2,6,12 */ + +MODULE_PARM_DESC(major,"can be used to change default major [" __MODULE_STRING(CAN_MAJOR) "]"); +MODULE_PARM_DESC(minor,"can be used to change default starting minor for each channel"); MODULE_PARM_DESC(extended,"enables automatic switching to extended format if ID>2047," " selects extended frames reception for i82527"); -int pelican=0; -MODULE_PARM(pelican,"1i"); MODULE_PARM_DESC(pelican,"unused parameter, PeliCAN used by default for sja1000p chips"); -int baudrate[MAX_TOT_CHIPS]; -MODULE_PARM(baudrate, "1-" __MODULE_STRING(MAX_TOT_CHIPS_STR)"i"); MODULE_PARM_DESC(baudrate,"baudrate for each channel in step of 1kHz"); -char *hw[MAX_HW_CARDS]={NULL,}; -MODULE_PARM(hw, "1-" __MODULE_STRING(MAX_HW_CARDS)"s"); MODULE_PARM_DESC(hw,"list of boards types to initialize - virtual,pip5,..."); -int irq[MAX_IRQ]={-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1}; -MODULE_PARM(irq, "1-" __MODULE_STRING(MAX_IRQ)"i"); MODULE_PARM_DESC(irq,"list of iterrupt signal numbers, most ISA has one per chip, no value for PCI or virtual"); -unsigned long io[MAX_HW_CARDS]={-1,-1,-1,-1,-1,-1,-1,-1}; -MODULE_PARM(io, "1-" __MODULE_STRING(MAX_HW_CARDS)"i"); MODULE_PARM_DESC(io,"IO address for each board, use 0 for PCI or virtual"); -int stdmask=0; -MODULE_PARM(stdmask, "1i"); +MODULE_PARM_DESC(clockfreq,"base board clock source frequency in step of 1kHz"); MODULE_PARM_DESC(stdmask,"default standard mask for i82527 chips"); -int extmask=0; -MODULE_PARM(extmask, "1i"); MODULE_PARM_DESC(extmask,"default extended mask for i82527 chips"); -int mo15mask=0; -MODULE_PARM(mo15mask, "1i"); MODULE_PARM_DESC(mo15mask,"mask for communication object 15 of i82527 chips"); -int processlocal=0; -MODULE_PARM(processlocal, "1i"); MODULE_PARM_DESC(processlocal,"select postprocessing/loopback of transmitted messages - " "0 .. disabled, 1 .. can be enabled by FIFO filter, 2 .. enabled by default"); + #ifdef CAN_WITH_RTL int can_rtl_priority=-1; MODULE_PARM(can_rtl_priority, "1i"); @@ -147,6 +200,13 @@ devfs_handle_t devfs_handles[MAX_TOT_MSGOBJS]; #endif #endif +#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,36)) +static int can_oldapi_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) +{ + return can_ioctl(file, cmd, arg); +} +#endif /* 2.6.36 */ + /* Pointers to dynamically allocated memory are maintained in a linked list * to ease memory deallocation. */ @@ -155,12 +215,16 @@ struct mem_addr *mem_head=NULL; struct file_operations can_fops= { #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)) - owner: THIS_MODULE, + owner: THIS_MODULE, #endif read: can_read, write: can_write, poll: can_poll, - ioctl: can_ioctl, + #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,36)) + ioctl: can_oldapi_ioctl, + #else /* Linux 3.x */ + unlocked_ioctl: can_ioctl, + #endif /* Linux 3.x */ open: can_open, release: can_close, #ifdef CAN_ENABLE_KERN_FASYNC @@ -186,7 +250,7 @@ struct rtl_file_operations can_fops_rtl = { /* 2.6 kernel attributes for sysfs - + static ssize_t show_xxx(struct class_device *cdev, char *buf) { return sprintf(buf, "xxxx\n"); @@ -241,14 +305,14 @@ int init_module(void) for (i=0; inr_boards; i++) { candev=hardware_p->candevice[i]; - if (candev->hwspecops->request_io(candev)) + if (candev->hwspecops->request_io(candev)) goto request_io_error; candev->flags|=CANDEV_IO_RESERVED; } for (i=0; inr_boards; i++) { candev=hardware_p->candevice[i]; - if (candev->hwspecops->reset(candev)) + if (candev->hwspecops->reset(candev)) goto reset_error; } @@ -267,7 +331,7 @@ int init_module(void) } chip->flags |= CHIP_ATTACHED; - + if(can_chip_setup_irq(chip)<0) { CANMSG("Error to setup chip IRQ\n"); goto interrupt_error; @@ -294,8 +358,10 @@ int init_module(void) { #if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,0)) char dev_name[32]; - #else + #elif LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,25) /* >= 2.6.15 */ struct class_device *this_dev; + #else + struct device *this_dev; #endif int dev_minor; for(i=0;i= 2.6.15 */ + #elif LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,25) /* >= 2.6.15 */ this_dev=class_device_create(can_class, NULL, MKDEV(major, dev_minor), NULL, "can%d", dev_minor); - #endif /* >= 2.6.15 */ + #elif LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,27) + this_dev=device_create_drvdata(can_class, NULL, MKDEV(major, dev_minor), objects_p[i], "can%d", dev_minor); + #else /* >= 2.6.28 */ + this_dev=device_create(can_class, NULL, MKDEV(major, dev_minor), objects_p[i], "can%d", dev_minor); + #endif /* >= 2.6.28 */ if(IS_ERR(this_dev)){ CANMSG("problem to create device \"can%d\" in the class \"can\"\n", dev_minor); + #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,25) }else{ /*this_dev->class_data=objects_p[i];*/ class_set_devdata(this_dev,objects_p[i]); + #endif /* <= 2.6.25 */ } #ifdef CONFIG_DEVFS_FS devfs_mk_cdev(MKDEV(major, dev_minor), S_IFCHR | S_IRUGO | S_IWUGO, "can%d", dev_minor); @@ -331,7 +403,7 @@ int init_module(void) #ifdef CONFIG_PROC_FS proc_error: ; CANMSG("Error registering /proc entry.\n"); - goto memory_error; + goto memory_error; #endif interrupt_error: ; @@ -354,14 +426,11 @@ int init_module(void) canqueue_rtl_done(); #endif /*CAN_WITH_RTL*/ - res=unregister_chrdev(major,DEVICE_NAME); - if (res<0) - CANMSG("Error unloading CAN driver, error: %d\n",res); - else - CANMSG("No CAN devices or driver setup error.\n"); + unregister_chrdev(major,DEVICE_NAME); + CANMSG("No CAN devices or driver setup error.\n"); register_error: - if ( can_del_mem_list() ) + if ( can_del_mem_list() ) CANMSG("Error deallocating memory\n"); return -ENODEV; @@ -369,11 +438,13 @@ int init_module(void) void cleanup_module(void) { - int res=0,i=0; +#if defined(CONFIG_DEVFS_FS) || (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)) + int i=0; +#endif #ifdef CONFIG_PROC_FS if (can_delete_procdir()) - CANMSG("Error unregistering /proc/can entry.\n"); + CANMSG("Error unregistering /proc/can entry.\n"); #endif #if defined(CONFIG_DEVFS_FS) || (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)) @@ -389,7 +460,11 @@ void cleanup_module(void) #ifdef CONFIG_DEVFS_FS devfs_remove("can%d", dev_minor); #endif + #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,25) class_device_destroy(can_class, MKDEV(major, dev_minor)); + #else /* >= 2.6.26 */ + device_destroy(can_class, MKDEV(major, dev_minor)); + #endif /* >= 2.6.26 */ } #endif } @@ -406,10 +481,8 @@ void cleanup_module(void) canqueue_rtl_done(); #endif /*CAN_WITH_RTL*/ - if ( can_del_mem_list() ) + if ( can_del_mem_list() ) CANMSG("Error deallocating memory\n"); - res=unregister_chrdev(major,DEVICE_NAME); - if (res<0) - CANMSG("Error unregistering CAN driver, error: %d\n",res); + unregister_chrdev(major,DEVICE_NAME); }