OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   / a1 P6 G( u& @2 W  h5 o
2. /*
   + k" Z9 @$ z1 C$ p: x
3. * edma_test.c
   + H; b. i" l. t
4. *
   ) f' i3 ]! B" m, y+ |" i4 b
5. * brief  EDMA3 Test Application
   3 Y( E& g$ I, v, B+ s+ v1 t' ]& v
6. *
   . t2 Y) {6 Q9 Z4 r) F
7. *   This file contains EDMA3 Test code.
   
8. *
   
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
    
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    4 p! K4 a0 [3 g; E
14. *
    
15. * This program is free software; you can redistribute it and/or
    , B& Z9 N/ ?6 M  {
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    
18. *
    ' ?; j. m5 Y3 l
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    & c/ ?7 T3 X1 z1 K) u/ W! R; Z* @% m, s: F, [
22. * GNU General Public License for more details.
    * D' K; L8 `7 L& y
23. */
    ) `8 j; {+ A$ _' |8 Z& ~3 \2 I" c
24. 
    / Q; x4 u& G) I+ ~7 w: n# p
25. #include <linux/module.h>
    3 U% y3 q: H4 m4 `3 d% E; B' R3 F
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    ( M5 v' U( f$ l5 {/ `8 R
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    2 }/ b. T- s2 c( F4 E7 x
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    1 r  l/ V. |" \" I5 W! x: [
33. #include <linux/mm.h>
    8 K9 p! S0 }1 M% O' i& g, H
34. #include <linux/dma-mapping.h>
      d* q1 q0 P' Q( B) [
35. 
    
36. #include <mach/memory.h>
    / J# y  a$ Z1 b: L
37. #include <mach/hardware.h>
    ( p$ Z6 z: X. f* Y
38. #include <mach/irqs.h>
    / R8 H& g0 q. Y/ e2 G
39. #include <asm/hardware/edma.h>
    # o* A+ S4 q, f  I% a* F
40. 
    
41. #undef EDMA3_DEBUG
    $ T  ~+ K1 W$ d, C+ t5 Q2 ]
42. /*#define EDMA3_DEBUG*/
    ; \* t  q1 H* `
43. 
    & A! o4 B! w8 i: R
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
      ?; I9 q2 o- P0 u2 h" m  e
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    . P$ z* Q! Q: l6 V$ W
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    ; s3 r! v/ Y$ R" b: O2 X* q8 R
51. #define DMA_FN_OUT
    1 H/ x& y+ h4 ]; w) K
52. #endif
    * m2 j. S8 n) G9 P; {8 K  K* y( G
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    - o. m7 l( s* t! d: [3 U# e
58. #define TCCHEN_SHIFT                22
    9 M/ V, X3 d/ S% ]2 L
59. #define ITCCHEN_SHIFT               23
    : O7 {/ e% g% j: R5 m$ J8 N0 \
60. 
    # B: _% m) r" b% q  v( W) R
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    # _/ L7 O2 G7 O/ Q& x) j
63. 
    ( ?5 r* _, Z: F2 }& ]0 j) l
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    1 f: q; c( w" W. _. O1 ]# y6 `9 g' e
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);
    
67. 
    . o+ Q6 \/ U$ [) Z  X
68. dma_addr_t dmaphyssrc1 = 0;
    4 L% a! m2 s+ t; F# v1 ^
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    1 f8 N. z; C2 E8 a  D1 J) Q
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    ; V( F& V. j. z4 o& t
76. char *dmabufdest2 = NULL;
    $ b7 N5 O3 D9 q; N; \, d, h
77. 
    $ _, R6 D, C" Q2 L% C2 q
78. static int acnt = 512;
    
79. static int bcnt = 8;
    9 q/ k$ c: ]" H* M8 R/ G
80. static int ccnt = 8;
    
81. 
    3 s; d) N4 ~8 a+ n. q+ w
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    
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
arm-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。
+ N( P* n: N; Z9 I5 E     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
+ q2 D; l+ ?# a- j' v* J. J
/ u2 A" o% E: w
+ O8 q% Y' E. ?$ L' x7 }4 i* {, A