OMAPL138如何在Linux下使用EDMA3驱动

yyj

# Y4 a9 e$ p2 k& S9 b

1. [code]EDMA sample test application
   
2. /*
   # N! z5 w6 r3 q, Q: U4 s
3. * edma_test.c
   
4. *
   : h  _2 R, i( F$ K0 E
5. * brief  EDMA3 Test Application
   
6. *
   + P  Z$ Z  j# f2 t7 v$ ~
7. *   This file contains EDMA3 Test code.
   - c8 \  [* t4 A( x
8. *
   8 V) _/ O& ?8 {) `# Q; R/ l
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   + v- F4 {! t5 B6 H5 h: S9 j
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    * c+ L' x* `( O" G- S. }
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
      L& R6 w( y% N' @
14. *
    * R, R& a9 F* i% l0 g" {
15. * This program is free software; you can redistribute it and/or
    , L$ X2 L3 n7 D& U( ~
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    - B6 D7 L) g: W( M
18. *
    : p8 V; W+ [, q! r8 _
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    0 {4 G4 }. ]  B+ A  ~9 K
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    ) D# @; W2 A6 B8 y+ F9 _
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    $ j! m8 L+ }* r  v
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    ' G' w- y( Z, }+ e
35. 
      Q/ t6 A0 L3 L1 l3 O4 a) w5 U
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    - q& T3 K" s; [2 |
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    0 Z/ E9 W; x5 Z
40. 
    " w, g& p' v' G8 R: A% d- P7 A" V
41. #undef EDMA3_DEBUG
    7 ^7 c8 h; u) u: ]5 i2 p
42. /*#define EDMA3_DEBUG*/
    % y6 @. V7 K5 W, [  ]
43. 
    + C9 P. j0 ]+ ^5 O
44. #ifdef EDMA3_DEBUG
    5 T1 a: Y% Q+ A% r
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    % }7 \9 x: i& `( F" j
48. #else
    , |( x) n0 I2 ~9 p* J8 [* ?- y
49. #define DMA_PRINTK( x... )
    ( N$ Y, |  o6 Q6 W. G
50. #define DMA_FN_IN
    ) R6 z. I/ }1 S# R" }' m& \
51. #define DMA_FN_OUT
    5 ~7 P; ~/ h6 f5 }5 H4 e
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    ! \# Q7 }% d5 w/ [0 p4 B- p
55. #define STATIC_SHIFT                3
    ) A6 R3 ]7 `+ K( N& |0 g
56. #define TCINTEN_SHIFT               20
    # u1 [4 e, X5 f3 p% X6 k
57. #define ITCINTEN_SHIFT              21
    - d! i% v. f( L5 G! e) h' |) x
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    8 y$ J% d' w* c' F
60. 
    % J) c+ Y9 w* ^5 I
61. static volatile int irqraised1 = 0;
    8 {/ w, Z/ m" |/ @9 I; {2 a
62. static volatile int irqraised2 = 0;
    0 y% X$ U- ]* Q
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);
    + M) l+ L% j3 `2 C/ w5 @6 ]
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    7 ]' p! ?/ @/ x1 k% B; o0 T& n0 e/ Q
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
      i8 y! y9 S8 a9 I  H/ y& ?
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    . b" R- Z+ E9 m  \/ Z9 g
72. 
    
73. char *dmabufsrc1 = NULL;
    ' D9 X) E% _% |/ _! j
74. char *dmabufsrc2 = NULL;
    ) u' D6 z$ y) z
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    9 n0 l# u7 m  b1 D2 C1 a7 W; Y
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    : s# B" I) G7 A
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    ; |' J. W+ k; f& q) V" U4 o
84. module_param(ccnt, int, S_IRUGO);

复制代码

6 |5 k& J  S1 v: j& Y* a
5 ^7 t1 b( @3 C+ N+ d0 U4 @8 K      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
6 k$ ^, u, Y3 E4 zarm-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。
     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
( H# L% B9 x( N& \* d4 F) K