OMAPL138如何在Linux下使用EDMA3驱动

yyj

* K- \( U) \2 z& G1 W; d3 O

1. [code]EDMA sample test application
   
2. /*
   7 U. ^% `5 `6 n2 |7 }: W# `, M
3. * edma_test.c
   
4. *
   7 l3 ?/ w) u* h% A
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   9 d5 _' _/ n1 H$ F, N
8. *
   - E9 f1 h  {+ g! }
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. *
    ( v* Q8 S# M- u+ Q6 F; k
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    3 l4 j+ t% Y8 S& h
15. * This program is free software; you can redistribute it and/or
    6 f4 d" h9 V7 v, \4 I
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    . o5 e" P# t; R: J9 H: F
18. *
    ) m8 m8 m/ M: a
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    4 Q* [: k) Q5 a9 O
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    # E" Y. ~  K- G
22. * GNU General Public License for more details.
    9 P0 P/ X* W9 z1 T; w( [
23. */
    
24. 
    ( \8 w& X8 k7 S/ \  _6 a3 h
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    1 k/ Y" g1 o/ i' h( [9 w
27. #include <linux/errno.h>
    ) V5 \( a/ c# q9 ?$ w& K: p
28. #include <linux/types.h>
    . c! Y) H) H& N! S- p+ N6 ^
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    0 Z( @. u5 B9 X+ N. D
39. #include <asm/hardware/edma.h>
    . |9 Y. }7 z; \. k3 ^* W, I
40. 
    5 l4 b4 X$ m! I
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    4 l( ?  v4 ^- \, L, J
43. 
    
44. #ifdef EDMA3_DEBUG
    5 ~4 l8 d5 O+ K5 i
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    # ?7 K4 A( D0 F4 \- B
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    * i! D6 X, `, K
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    2 d# ]  ~& j/ Z8 j
51. #define DMA_FN_OUT
    ) t- Y/ ?( N$ K+ h! s2 {4 U: M
52. #endif
    9 {) H. K% z7 ^. P
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    ( t6 |. J! N. J" p7 o
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    ; X2 G$ W& h4 g; w: V( X7 P
59. #define ITCCHEN_SHIFT               23
    * l6 u4 [; b3 s* S0 F* b
60. 
    
61. static volatile int irqraised1 = 0;
    ! y; s' O* K& p8 b
62. static volatile int irqraised2 = 0;
    ' \4 X" J- O6 p9 U
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);
    
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;
    
69. dma_addr_t dmaphyssrc2 = 0;
    . G, Y/ I7 X$ x) z
70. dma_addr_t dmaphysdest1 = 0;
    % p7 t1 a7 z5 @
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    5 L- e+ o" `3 R% S6 e
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    / g+ o9 d. t5 {
77. 
    2 V' A( Y# ]0 P  z: ]
78. static int acnt = 512;
    / k$ O2 R! @& l
79. static int bcnt = 8;
    8 {' T' s8 ^* z7 c8 J! t0 X
80. static int ccnt = 8;
    
81. 
    ! ^9 @8 P% b6 {4 p
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

, v# F2 K' }5 d' l' K2 Q  x
      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。
     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。

$ |- P' b, q  T# H$ G+ f' O