OMAPL138如何在Linux下使用EDMA3驱动

yyj

- T; |# Y) ^. Q1 n9 G8 Z

1. [code]EDMA sample test application
   ; j( ~$ e) v4 f, a" q& j+ U* f
2. /*
   1 V, j6 r# s( F( T3 m2 F, [) }
3. * edma_test.c
   
4. *
   ' D9 t; K( X% k2 f: j
5. * brief  EDMA3 Test Application
   
6. *
   ; H& {* ]& o2 y
7. *   This file contains EDMA3 Test code.
   
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   ) e7 V4 j7 }, y8 s/ Z& ]
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    
12. *
    : ~+ e5 R  x$ e+ B
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    0 @1 _# D% u( H! Z; [
15. * This program is free software; you can redistribute it and/or
    
16. * modify it under the terms of the GNU General Public License as
    ( O: S$ U3 K$ t
17. * published by the Free Software Foundation version 2.
    5 t8 @" ~- w) D/ ?$ v% k) p4 \, V* N
18. *
    5 `  u9 {, ^4 b. n9 R+ |9 k$ U
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    ) U! o; q. C6 C* q' ~
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    5 [( C: |- @0 j# N" C
24. 
    
25. #include <linux/module.h>
    ' M2 l1 b" s' h
26. #include <linux/init.h>
    3 y8 M* e1 r' H. Y
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    8 _, q9 [1 e: a2 |+ `' B6 W5 W
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    ( u5 Y! w7 J8 `
33. #include <linux/mm.h>
    , Y0 ^: x4 h9 S& ^: |
34. #include <linux/dma-mapping.h>
    5 w/ s! t& u0 T# G' [% F6 F
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    2 c* T7 p$ G. M! Y7 j: z" z3 {
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    9 d# i" {: Q$ t0 p
43. 
    
44. #ifdef EDMA3_DEBUG
    . K5 `* ~4 C1 A" x
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    / y$ @0 x1 t' e  K1 c
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    / ~3 p" T4 k  d* G/ n3 i
50. #define DMA_FN_IN
    ( v% A8 G( \  a; j2 D( |
51. #define DMA_FN_OUT
    . a8 t% `0 d2 u! [9 E2 o
52. #endif
    9 ?4 q6 i% [' U8 r& ?* W% z" P
53. 
    ! P, t2 f# M! q7 F6 i2 `/ [
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    2 W( X2 P. C- w1 S  _. p& o
55. #define STATIC_SHIFT                3
    # m2 b' n% l1 O+ [& f
56. #define TCINTEN_SHIFT               20
    2 H8 S  f  u8 w& W
57. #define ITCINTEN_SHIFT              21
    + Z% ?3 O( F" F
58. #define TCCHEN_SHIFT                22
    : Q7 R3 b- x. t: p
59. #define ITCCHEN_SHIFT               23
    6 z/ a4 k1 V! K; T" t6 _. @' k
60. 
    
61. static volatile int irqraised1 = 0;
    2 Y2 B4 X( q( @: E! h
62. static volatile int irqraised2 = 0;
    ) K2 A$ n' @* ]# i) v
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    # d; r2 ?0 \* Z! n) i
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    ' z/ q  X) F7 Z. }) ?
69. dma_addr_t dmaphyssrc2 = 0;
    + m! E" g. q. G+ t. Q* j* }
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    , |, M5 C- ^& g& u4 e$ V
79. static int bcnt = 8;
    , r9 q, y; L2 p3 k/ N/ p% M" q
80. static int ccnt = 8;
    5 l. ?7 ?4 k% C. F- V+ L" t1 R& D
81. 
    2 d( S+ R2 I8 z5 {5 i) y4 C
82. module_param(acnt, int, S_IRUGO);
    * J* ]' l+ e( T$ l6 S) P" [
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

* F! o; G6 ?( G) A5 c- V8 {: n+ b
" i  g* ^7 O. g7 r; G      这是在TI上找到的一个针对Davanci处理器简单的EDMA3驱动程序测试例程的一部分，我在编译的过程中是用
5 Y9 C+ y% O0 g0 S" O( farm-none-linux-gnueabi-gcc  -I /home/tl/omapl138/linux-3.3/arch/arm/include -I /home/tl/omapl138/linux-3.3/include  EDMA3test.cpp -o EDMA3这个命令来链接库文件进行编译，但是报的错误特别多，我又试着一个函数一个函数往进加，仍然是很多错误。
& v. h/ n: X( g: ?$ H# M     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。


4 T/ D, w: R6 ?7 A  [/ J/ C4 A$ G