OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   4 E8 X4 a' I1 }. y& c# N0 `( s
2. /*
   
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   5 R- s# s/ z  `; o* M
6. *
   $ D1 {% |, ^6 \8 W
7. *   This file contains EDMA3 Test code.
   
8. *
   $ a9 U* ^. N  [5 l9 I4 F. ]
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    0 R: x/ n- x8 j9 o1 y9 \
11. *         TO CHANGE.
    
12. *
    9 R: J" E& b0 O- ]" T4 ~+ F- M
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    
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( Y& h) i9 V2 X+ A, @
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    5 J& s( f9 d& \1 \5 a0 A# O7 b9 w
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    & i$ @9 l" I, u2 m7 U% P. i
22. * GNU General Public License for more details.
    1 P5 F, D& D; o. `& o
23. */
    
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    4 {8 I$ v- ~! O4 x  }
27. #include <linux/errno.h>
    ; X" U1 i7 W' m4 R) o8 s! Y' Y2 I
28. #include <linux/types.h>
    , `3 U4 Z! F6 ?
29. #include <linux/interrupt.h>
    9 C5 M6 f$ q; ?' t( \
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    $ _* U' ]8 x! L
32. #include <linux/sysctl.h>
    4 a4 L: n, i5 D+ A. T0 }) P) v, P
33. #include <linux/mm.h>
    8 n' X  X& m; }  e2 W5 h; o
34. #include <linux/dma-mapping.h>
    # n+ ?6 }. j2 d; V8 N) j# w- i
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
      M  C$ h0 M! J9 [% |( r  T4 B" o; O+ }
39. #include <asm/hardware/edma.h>
    
40. 
    * R( n- f9 @- Q+ ~* X
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    8 N2 [) H! m& g) J& P1 R% U$ Q
43. 
    ! x- |" @0 P* P/ K
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    6 E9 n3 I/ ^: i, j5 ^: t0 v0 c7 k
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... )
    ; @! P# |) I' f7 t9 l( ]# H0 r, ?
50. #define DMA_FN_IN
    2 ~! o$ t) N7 p, f! z) e$ M
51. #define DMA_FN_OUT
    
52. #endif
    4 N& r$ l; o3 s' m- j
53. 
    - C0 w0 ~4 A0 M9 \9 B  H
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    # b( a  U5 `7 `( M- r
56. #define TCINTEN_SHIFT               20
    9 p$ g) @) }/ b- O
57. #define ITCINTEN_SHIFT              21
    " C0 ]" w2 r- L) U8 [5 |8 t( [
58. #define TCCHEN_SHIFT                22
    : N$ e2 `: }1 s( P/ z
59. #define ITCCHEN_SHIFT               23
    - M& g- V, J0 R8 E9 F: W# n
60. 
    3 M. G& `, b% B
61. static volatile int irqraised1 = 0;
    ' K. z' t) ~. L# S
62. static volatile int irqraised2 = 0;
    , R7 p( o9 h/ h8 Y4 Q% p+ u
63. 
    ) k0 q: F( p4 @
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    : w+ V3 U- `' G( d. v
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    8 |$ Z3 M  A  i
67. 
    ' K, ]: p9 H5 Z/ d- G5 Q
68. dma_addr_t dmaphyssrc1 = 0;
    1 m' N) ]+ E0 N3 t
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    ) d8 e% D! @. @- I; n$ |5 X
71. dma_addr_t dmaphysdest2 = 0;
    2 g+ }: n9 r$ n" n$ \
72. 
    
73. char *dmabufsrc1 = NULL;
    ' _* }" D+ ?% ?9 M3 F( C7 ^! ^
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    % y- U4 [8 {' d' k$ K2 t* q" L
77. 
    
78. static int acnt = 512;
    1 Z5 J3 E: A7 l2 P4 D
79. static int bcnt = 8;
    2 @* N6 F; W1 t8 x8 ?
80. static int ccnt = 8;
    0 a" H6 A$ D, q7 i
81. 
    , L/ f" U- q1 _! A# H
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    $ f2 f( }5 q6 d: F9 L" _
84. module_param(ccnt, int, S_IRUGO);

复制代码

      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
4 b2 F8 `. N, u3 c& U6 B; s5 y6 r: Carm-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。
6 q3 W! D9 ?- c; @: e% F4 i% |     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
; |& S* t: D; b4 u8 r6 [7 L9 |5 q
" G/ f' n. P5 L% |5 {