OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   5 z7 _3 q4 V" [" S
2. /*
   
3. * edma_test.c
   " @; i/ c; @" W7 |* K, I4 J
4. *
   
5. * brief  EDMA3 Test Application
   . U: E" F/ T) `7 K0 v
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   : b& O# j! [) \' P
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
    - O' H& V7 v8 n
11. *         TO CHANGE.
    
12. *
    $ g; O5 ~# ~$ [# N9 G: Q' J
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    8 n( x# P8 Q& }9 ]1 S" b& U/ R. A
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
    ! l9 @* e+ J& y  F
17. * published by the Free Software Foundation version 2.
    
18. *
    - c3 x" G; ~) U' t3 u# H
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    + `9 N5 |% _% b7 E4 s. ^9 D2 u
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    / o$ I9 j1 l* R) L
22. * GNU General Public License for more details.
    
23. */
    + T& H! u3 ~3 R0 `+ y
24. 
    
25. #include <linux/module.h>
    7 ~' O3 r% r+ m9 C
26. #include <linux/init.h>
    , x6 [, g/ L- o' P* M
27. #include <linux/errno.h>
    * o& Z1 p/ V5 ~* e8 g+ p/ H
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    . u) Y5 k: L5 l) z( ]0 S# ?
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    6 q& A; L; w1 R& L6 ]" M- P& \: r, }
33. #include <linux/mm.h>
    & t0 |, @6 H8 W, K! Z1 }1 R
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    0 T5 B  |) o+ I9 F7 ?$ ?
37. #include <mach/hardware.h>
    0 O  `5 k5 x  J5 K
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    " A# v4 \0 }: a8 P9 T' o' G
40. 
    + f% M- H  K6 m2 I. i9 C  {
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    9 D# I& r, {+ R, C% T/ Z
43. 
    - D% z" I0 \! [3 d: \/ e/ M
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    6 D4 I7 h. o( H0 C9 ?$ m- m/ u
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... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    ; ?. \. [9 p8 S5 C+ }1 ]1 Y
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    1 G# H% t  F" `
58. #define TCCHEN_SHIFT                22
    , V9 C4 v  y. u% f
59. #define ITCCHEN_SHIFT               23
    
60. 
    4 V2 F! @0 D) K, n9 w
61. static volatile int irqraised1 = 0;
    # k- Q* F, R; N, I' ^4 `3 Y: f# w
62. static volatile int irqraised2 = 0;
    % Z# p/ H8 f  j: N# B
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    8 ^* A" {7 |6 Y3 k
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    9 P* A$ V9 O1 Y$ a
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;
    + I6 F5 p: t  y- K5 A5 x: I: i2 b
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    6 T) o, K5 T/ y+ w+ f
71. dma_addr_t dmaphysdest2 = 0;
    ) u7 ~$ _$ h! f9 d# l& Z/ }; x
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    + n2 e$ R0 R# o0 ~: g
78. static int acnt = 512;
    ' {* s1 s) _: a  ^" w& r$ M* ~
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    1 w- c1 m3 _4 \9 @% u' x+ w* Y
81. 
    2 p, G/ C  t9 ^( t8 ^. U& ]1 \+ L: b0 {- ^
82. module_param(acnt, int, S_IRUGO);
    . a3 C  G) q  p6 U: J# R
83. module_param(bcnt, int, S_IRUGO);
    9 r8 e: ?0 \7 a/ h% P2 L
84. module_param(ccnt, int, S_IRUGO);

复制代码

" b8 A* N) j* Q2 ~& T" J* `
      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
7 U# t7 p& n+ z. X5 t* ^8 Jarm-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。


# Q: x2 c7 Y, H" m