OMAPL138如何在Linux下使用EDMA3驱动

yyj

& r9 b/ m' z1 H% ~4 l

1. [code]EDMA sample test application
   
2. /*
   & Z4 c, I& Q7 Y0 n
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   6 j4 R0 e( ^, `1 P* m2 g( E+ j
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
    : k/ E/ H5 \1 W/ Y9 Z: t
11. *         TO CHANGE.
    
12. *
    ; @/ b* g- Z# _$ g
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    , B0 P. r5 d* w7 W
15. * This program is free software; you can redistribute it and/or
    * M2 k; m) s/ ~& g; P
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    / U/ B) I( b3 F( D0 P
18. *
      U6 H" u9 j! |/ B2 e/ V; o
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
    
22. * GNU General Public License for more details.
    % ]' u2 \' |% |
23. */
    8 R  G/ ]5 ]3 A( `
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    8 ?* s" Y9 D5 n  ?2 i
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    0 }4 C2 D; q. N5 e" H- }
31. #include <linux/moduleparam.h>
    1 S. L0 l2 @# |- ?8 Y$ i7 ?! n
32. #include <linux/sysctl.h>
    " `  h! K1 ?4 \6 [2 n- [9 c9 o; l- n
33. #include <linux/mm.h>
    % i0 k* M, z; ~( E+ R+ x! r' d
34. #include <linux/dma-mapping.h>
    - B& \* L! N7 u8 G( ~
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    * \+ Y" d8 {, j; b  R
38. #include <mach/irqs.h>
    + h8 s; H9 r, g: A" \* r5 H" B
39. #include <asm/hardware/edma.h>
    ( r" }# [+ T8 o4 A& e, J! z
40. 
    
41. #undef EDMA3_DEBUG
    ) }# F2 @' @4 ?2 D
42. /*#define EDMA3_DEBUG*/
    * L5 P  K7 s& V5 G( h% G4 Q4 ]
43. 
    # q5 Y$ H* g1 ?4 F
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    " D* Y! `: ^* J! z2 k( O
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    " r& f0 e, v2 j" Y+ ]
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    ' o2 `. @% J, t( l  L
48. #else
    " _* L1 I* }- z( h
49. #define DMA_PRINTK( x... )
    + W: P" A) }4 }6 R. _
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    8 J5 ^" x7 h: ^, `
52. #endif
    % t# ?) I4 v# h
53. 
      F( G+ V. |: D
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    3 c# S9 s; k6 p; I, ~, b$ [5 b
55. #define STATIC_SHIFT                3
    & \7 q/ z% s! w/ j2 E
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    1 C0 D( y* @- s# h$ _7 {0 d5 [/ C+ J
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    2 j4 M4 l7 o3 f. N5 ~3 p2 _
60. 
    
61. static volatile int irqraised1 = 0;
    2 I# v0 g0 O+ n7 ^
62. static volatile int irqraised2 = 0;
    ) ]* z& ]4 F% k" L
63. 
    3 R2 R/ i  L/ y, Q1 X6 x
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);
    " t! C- }" C; V5 }
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    , D" b0 q4 T/ L  g7 q6 i
67. 
    3 I% ~4 O; n. o8 l& ?3 |4 M
68. dma_addr_t dmaphyssrc1 = 0;
    # E$ a1 d7 s5 g1 T" m/ B
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    & J3 L" H' k* O+ s
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    4 e' l! m$ I9 x
73. char *dmabufsrc1 = NULL;
    2 l, U6 J+ y* r
74. char *dmabufsrc2 = NULL;
    ( ?: Z) a6 j9 V2 L7 {) g+ z/ Y
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    ( e  g' K6 Z) i" l
78. static int acnt = 512;
    3 x* T& V# E3 K- N" K( I
79. static int bcnt = 8;
    1 g4 }) D+ \$ V& y
80. static int ccnt = 8;
    9 J1 o3 w9 A  K6 C0 X% D! A0 Y# U
81. 
    
82. module_param(acnt, int, S_IRUGO);
    ; o3 V5 ?% _, ^/ o
83. module_param(bcnt, int, S_IRUGO);
    % c2 z, N7 H7 E
84. module_param(ccnt, int, S_IRUGO);

复制代码

0 z  I7 \) o7 {% t' {7 i
      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
) y4 b, g& ?- n. u, q/ I  u3 z  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。
- b- F- z: b8 W: `; I/ _
0 \& b% G" _2 R  B