OMAPL138如何在Linux下使用EDMA3驱动

yyj

* p# F) U3 t9 I; R, H

1. [code]EDMA sample test application
   0 B7 C  t  z. W) S
2. /*
   
3. * edma_test.c
   8 Y- {" o# y! e5 c6 z: M6 T
4. *
   ; Q" B) J9 O# z2 V; ^  f! w
5. * brief  EDMA3 Test Application
   
6. *
   
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
    ' K2 i0 p2 A  ]! x
11. *         TO CHANGE.
    1 y5 X9 Y1 d1 U( B
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    - ]! u$ n" C- \( T, b9 ]
14. *
    1 h3 n; n# V7 M9 Q  E' `
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
    / |9 w/ P& f, Q7 y# s  d( P
17. * published by the Free Software Foundation version 2.
    . ^7 [- H6 b1 C: w3 |" s
18. *
    , D6 w4 n: V: p& [5 o
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    - o9 @" S7 W' I* u
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    4 u% O9 F) M6 R7 Q' K: ^
22. * GNU General Public License for more details.
    , ]# R. K' w9 }( Y6 d* \/ W" K' d
23. */
    7 J/ X2 N0 v: a; s/ P0 q) G
24. 
    0 F: {+ ^  t  c. {+ |
25. #include <linux/module.h>
      j! q; ?! m- s; H5 U8 N. ?, r( S
26. #include <linux/init.h>
    5 `  F8 G# |# @! ^4 w5 w: @8 l9 z
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    2 U, h9 Q" l; W* `, t9 F2 M
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    + m: l; d, d3 u' W6 b9 v/ A" ?0 W  k
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    & ^, g% i. T9 i) O4 V
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    / r% {  S4 p# [5 R- Q
39. #include <asm/hardware/edma.h>
    9 W* X7 U' n& Q8 @  S& w4 v+ Z8 S
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    5 m, Q! `: m% a7 t- p/ U+ ]
43. 
    2 A! o3 H) Y3 C
44. #ifdef EDMA3_DEBUG
    6 k$ D, S: l8 U! k) r3 \  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__)
    4 Q. k) K0 e3 t0 J, B5 u2 w- ^$ e) ~
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    # d- N% e2 f8 w* b8 h  f8 q4 `
50. #define DMA_FN_IN
    + q0 D& i% g! V: O+ F8 ]% Y
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    # R2 y! a; v* Z+ u/ x
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    1 w# y# m' m. S" B# A; ^* b
55. #define STATIC_SHIFT                3
    ; ?2 e2 U2 [, g8 F/ p: a
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    9 r% u0 {+ @& p. f) a7 U# v4 r
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    - Y. t3 h" h, I! }
62. static volatile int irqraised2 = 0;
    
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);
    . h, j* u$ ]  N
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ( [$ O; N. e+ j2 W: R# {
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    5 W0 Y2 a# g- I; ?5 s- J
74. char *dmabufsrc2 = NULL;
    ' x1 V: q) l$ j
75. char *dmabufdest1 = NULL;
    4 H# ?( o6 r, u+ u- Q) W; a, ~( a
76. char *dmabufdest2 = NULL;
    
77. 
    2 m" _" Y( O) ]5 [9 L
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    , P* {' @6 ]) s( m1 f
81. 
    
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

+ A; T3 l; {, B$ V5 ?" j: e$ S
      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
0 L6 R8 h7 n" V$ t$ X- Varm-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。

2 a& L' \( S( s8 @. s
$ {3 f8 A8 ]! j( T- q" r& u