1 /**************************************************************************/
2 /* File: can_sysdep.h - hides differences between individual Linux kernel */
3 /* versions and RT extensions */
5 /* LinCAN - (Not only) Linux CAN bus driver */
6 /* Copyright (C) 2002-2009 DCE FEE CTU Prague <http://dce.felk.cvut.cz> */
7 /* Copyright (C) 2002-2009 Pavel Pisa <pisa@cmp.felk.cvut.cz> */
8 /* Funded by OCERA and FRESCOR IST projects */
10 /* LinCAN is free software; you can redistribute it and/or modify it */
11 /* under terms of the GNU General Public License as published by the */
12 /* Free Software Foundation; either version 2, or (at your option) any */
13 /* later version. LinCAN is distributed in the hope that it will be */
14 /* useful, but WITHOUT ANY WARRANTY; without even the implied warranty */
15 /* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU */
16 /* General Public License for more details. You should have received a */
17 /* copy of the GNU General Public License along with LinCAN; see file */
18 /* COPYING. If not, write to the Free Software Foundation, 675 Mass Ave, */
19 /* Cambridge, MA 02139, USA. */
21 /* To allow use of LinCAN in the compact embedded systems firmware */
22 /* and RT-executives (RTEMS for example), main authors agree with next */
23 /* special exception: */
25 /* Including LinCAN header files in a file, instantiating LinCAN generics */
26 /* or templates, or linking other files with LinCAN objects to produce */
27 /* an application image/executable, does not by itself cause the */
28 /* resulting application image/executable to be covered by */
29 /* the GNU General Public License. */
30 /* This exception does not however invalidate any other reasons */
31 /* why the executable file might be covered by the GNU Public License. */
32 /* Publication of enhanced or derived LinCAN files is required although. */
33 /**************************************************************************/
42 #include <rtl_mutex.h>
43 #include <rtl_sched.h>
45 #endif /*CAN_WITH_RTL*/
47 /*#define __NO_VERSION__*/
48 /*#include <linux/module.h>*/
50 #include <linux/version.h>
51 #include <linux/wait.h>
52 #include <linux/list.h>
54 #include <linux/ioport.h>
55 #include <linux/delay.h>
56 #include <linux/sched.h>
57 #include <linux/interrupt.h>
58 #include <linux/time.h>
59 #include <asm/errno.h>
62 #include <asm/atomic.h>
64 #include <asm/uaccess.h>
66 #include "lincan_config.h"
69 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0))
70 #define CAN_ENABLE_KERN_FASYNC
72 #define CAN_ENABLE_PCI_SUPPORT
74 #ifdef CONFIG_OC_LINCANVME
75 #define CAN_ENABLE_VME_SUPPORT
79 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,4,0))
80 #include <linux/malloc.h>
82 #include <linux/slab.h>
85 #ifdef CAN_ENABLE_PCI_SUPPORT
86 #include "linux/pci.h"
87 #endif /*CAN_ENABLE_PCI_SUPPORT*/
89 /* Next is not sctrictly correct, because of 2.3.0, 2.3.1, 2.3.2
90 kernels need next definitions too */
91 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,2,19)) /* may need correction */
92 #define wait_queue_head_t struct wait_queue *
93 #define wait_queue_t struct wait_queue
94 #define init_waitqueue_head(queue_head) (*queue_head=NULL)
95 #define init_waitqueue_entry(qentry,qtask) \
96 (qentry->next=NULL,qentry->task=qtask)
97 #define DECLARE_WAIT_QUEUE_HEAD(name) \
98 struct wait_queue * name=NULL
99 #define DECLARE_WAITQUEUE(wait, current) \
100 struct wait_queue wait = { current, NULL }
101 #define init_MUTEX(sem) (*sem=MUTEX)
102 #define DECLARE_MUTEX(name) struct semaphore name=MUTEX
105 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,4,0)) && !defined(DECLARE_TASKLET)
106 #define tasklet_struct tq_struct
107 #define DECLARE_TASKLET(_name, _func, _data) \
108 struct tq_struct _name = { sync: 0, routine: _func, data: (void*)_data }
110 /* void tasklet_init(struct tasklet_struct *t, void (*func)(unsigned long), unsigned long data); */
111 #define tasklet_init(_tasklet, _func, _data) \
113 /* (_tasklet)->next=NULL; */ \
114 /* Above not needed for 2.2.x and buggy for 2.4.x */ \
115 (_tasklet)->sync=0; \
116 (_tasklet)->routine=_func; \
117 (_tasklet)->data=(void*)_data; \
120 /* void tasklet_schedule(struct tasklet_struct *t) */
121 #define tasklet_schedule(_tasklet) \
123 queue_task(_tasklet,&tq_immediate); \
124 mark_bh(IMMEDIATE_BH); \
127 /* void tasklet_kill(struct tasklet_struct *t); */
128 #define tasklet_kill(_tasklet) \
134 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,7)) || (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0))
137 (MINOR(file->f_dentry->d_inode->i_rdev))
139 #else /* Linux kernel < 2.5.7 or >= 2.6.0 */
142 (minor(file->f_dentry->d_inode->i_rdev))
144 #endif /* Linux kernel < 2.5.7 or >= 2.6.0 */
147 #if ((LINUX_VERSION_CODE < KERNEL_VERSION(2,5,68)) && !defined(IRQ_RETVAL))
148 typedef void can_irqreturn_t;
150 #define CAN_IRQ_HANDLED
151 #define CAN_IRQ_RETVAL(x)
153 typedef irqreturn_t can_irqreturn_t;
154 #define CAN_IRQ_NONE IRQ_NONE
155 #define CAN_IRQ_HANDLED IRQ_HANDLED
156 #define CAN_IRQ_RETVAL IRQ_RETVAL
157 #endif /* <=2.5.67 */
158 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19))
159 #define CAN_IRQ_HANDLER_ARGS(irq_number, dev_id) \
160 int irq_number, void *dev_id, struct pt_regs *regs
162 #define CAN_IRQ_HANDLER_ARGS(irq_number, dev_id) \
163 int irq_number, void *dev_id
164 #endif /* < 2.6.19 */
165 #else /*CAN_WITH_RTL*/
166 typedef int can_irqreturn_t;
167 #define CAN_IRQ_NONE 0
168 #define CAN_IRQ_HANDLED 1
169 #define CAN_IRQ_RETVAL(x) ((x) != 0)
170 #define CAN_IRQ_HANDLER_ARGS(irq_number, dev_id) \
171 int irq_number, void *dev_id, struct pt_regs *regs
172 #endif /*CAN_WITH_RTL*/
174 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,33))
175 #define can_synchronize_irq(irqnum) synchronize_irq()
177 #define can_synchronize_irq synchronize_irq
180 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,4,0))
181 #define del_timer_sync del_timer
184 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,9))
185 typedef unsigned long can_ioptr_t;
186 #define can_ioptr2ulong(ioaddr) ((unsigned long)(ioaddr))
187 #define can_ulong2ioptr(addr) ((unsigned long)(addr))
188 #define can_inb(ioaddr) inb(ioaddr)
189 #define can_outb(data,ioaddr) outb(data,ioaddr)
190 #define can_inw(ioaddr) inw(ioaddr)
191 #define can_outw(data,ioaddr) outw(data,ioaddr)
192 #define can_inl(ioaddr) inl(ioaddr)
193 #define can_outl(data,ioaddr) outl(data,ioaddr)
195 typedef void __iomem * can_ioptr_t;
196 #define can_ioptr2ulong(ioaddr) ((unsigned long __force)(ioaddr))
197 #define can_ulong2ioptr(addr) ((can_ioptr_t)(addr))
198 #define can_inb(ioaddr) inb(can_ioptr2ulong(ioaddr))
199 #define can_outb(data,ioaddr) outb(data,can_ioptr2ulong(ioaddr))
200 #define can_inw(ioaddr) inw(can_ioptr2ulong(ioaddr))
201 #define can_outw(data,ioaddr) outw(data,can_ioptr2ulong(ioaddr))
202 #define can_inl(ioaddr) inl(can_ioptr2ulong(ioaddr))
203 #define can_outl(data,ioaddr) outl(data,can_ioptr2ulong(ioaddr))
206 #define can_readb readb
207 #define can_writeb writeb
208 #define can_readw readw
209 #define can_writew writew
210 #define can_readl readl
211 #define can_writel writel
213 #define can_ioport2ioptr can_ulong2ioptr
215 #ifdef __HAVE_ARCH_CMPXCHG
216 #define CAN_HAVE_ARCH_CMPXCHG
217 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0))
218 #define CAN_HAVE_ATOMIC_CMPXCHG
222 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0))
223 #define can_pci_dev_get(_M_pdev) (_M_pdev)
224 #define can_pci_dev_put(_M_pdev) do {} while(0)
225 #define can_pci_get_device pci_find_device
226 #define can_pci_get_subsys pci_find_subsys
228 #define can_pci_dev_get pci_dev_get
229 #define can_pci_dev_put pci_dev_put
230 #define can_pci_get_device pci_get_device
231 #define can_pci_get_subsys pci_get_subsys
235 /* Standard LINUX kernel */
237 #define can_spinlock_t spinlock_t
238 #define can_spin_irqflags_t unsigned long
239 #define can_spin_lock spin_lock
240 #define can_spin_unlock spin_unlock
241 #define can_spin_lock_irqsave spin_lock_irqsave
242 #define can_spin_unlock_irqrestore spin_unlock_irqrestore
243 #define can_spin_lock_init spin_lock_init
245 #ifndef DEFINE_SPINLOCK
246 #define CAN_DEFINE_SPINLOCK(x) can_spinlock_t x = SPIN_LOCK_UNLOCKED
247 #else /*DEFINE_SPINLOCK*/
248 #define CAN_DEFINE_SPINLOCK DEFINE_SPINLOCK
249 #endif /*DEFINE_SPINLOCK*/
251 #if !defined(CONFIG_PREEMPT_RT) && ( defined(CONFIG_PREEMPT) || (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)) )
252 #define can_preempt_disable preempt_disable
253 #define can_preempt_enable preempt_enable
254 #else /*CONFIG_PREEMPT*/
255 #define can_preempt_disable() do { } while (0)
256 #define can_preempt_enable() do { } while (0)
257 #endif /*CONFIG_PREEMPT*/
259 #define can_enable_irq enable_irq
260 #define can_disable_irq disable_irq
262 #define can_printk printk
264 /* CAN message timestamp source, it is called from interrupt context */
265 #define can_gettimeofday do_gettimeofday
267 #else /*CAN_WITH_RTL*/
269 #define can_spinlock_t rtl_spinlock_t
270 #define can_spin_irqflags_t rtl_irqstate_t
271 #define can_spin_lock rtl_spin_lock
272 #define can_spin_unlock rtl_spin_unlock
273 #define can_spin_lock_irqsave rtl_spin_lock_irqsave
274 #define can_spin_unlock_irqrestore rtl_spin_unlock_irqrestore
275 #define can_spin_lock_init rtl_spin_lock_init
277 #define CAN_DEFINE_SPINLOCK(x) can_spinlock_t x = SPIN_LOCK_UNLOCKED
279 #define can_preempt_disable() do { } while (0)
280 #define can_preempt_enable() do { } while (0)
282 #define can_enable_irq rtl_hard_enable_irq
283 #define can_disable_irq rtl_hard_disable_irq
285 #define can_printk rtl_printf
288 * terrible hack to test rtl_file private_data concept, ugh !!!
289 * this would result in crash on architectures, where
290 * sizeof(int) < sizeof(void *)
292 #define can_set_rtl_file_private_data(fptr, p) do{ fptr->f_minor=(long)(p); } while(0)
293 #define can_get_rtl_file_private_data(fptr) ((void*)((fptr)->f_minor))
295 extern can_spinlock_t can_irq_manipulation_lock;
297 /* CAN message timestamp source, it is called from interrupt context */
298 #define can_gettimeofday(ptr) do {\
299 struct timespec temp_timespec;\
300 clock_gettime(CLOCK_REALTIME,&temp_timespec);\
301 ptr->tv_usec=temp_timespec.tv_nsec/1000;\
302 ptr->tv_sec=temp_timespec.tv_sec;\
305 #endif /*CAN_WITH_RTL*/
307 #endif /*_CAN_SYSDEP_H*/