OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   $ x# m9 s  j9 V/ W6 n2 r
2. /*
   
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   0 k: z0 b' l! r7 N: k
6. *
   
7. *   This file contains EDMA3 Test code.
   3 `; a) e) B! G! \4 J6 _
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.
    5 h7 }$ A% ~9 q/ y6 `3 y3 S
12. *
    . T4 H4 ?0 P5 ?' ^9 u' ?  w% e
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
      a; T) A- O9 Z! G( N' s% C1 E
14. *
    8 u) D3 w- s: n
15. * This program is free software; you can redistribute it and/or
    * ?" c" v+ M. h# n
16. * modify it under the terms of the GNU General Public License as
    + K" R* s# R1 M# G* w
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    ) U0 l+ l- m# I* t6 S
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    + q5 j1 G9 W( h2 t7 K4 p
24. 
    8 }5 j& Q' ?* y7 z% s
25. #include <linux/module.h>
    ) K- ~1 N  V7 l  K
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    . k" o. b" ]+ |. M1 p6 o
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    ; f+ z: G+ ~5 u
30. #include <asm/io.h>
    " T8 q7 C, s, g0 E7 U( F
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    9 u% J" s, F' s8 @. b
34. #include <linux/dma-mapping.h>
    9 \+ _7 ^' ^  ^' w5 x
35. 
    & x3 X8 R) T5 l8 F! S
36. #include <mach/memory.h>
    + o3 a; W3 G% ~: i
37. #include <mach/hardware.h>
    5 Y/ ~7 B; @- [
38. #include <mach/irqs.h>
    " D4 P' K+ o$ I* M2 u: u
39. #include <asm/hardware/edma.h>
    
40. 
    7 v0 ]. a4 q1 r- h, b& n
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    1 L9 c/ C% x+ W5 ~. J" q
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    ( ~" i1 W0 `3 e1 p
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    : y. |; \% ~, g2 [% Y/ Z7 D
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    9 F4 P5 n/ N  j* Q9 j; ]9 N- N
49. #define DMA_PRINTK( x... )
    + b( V% V: U5 ~4 B3 I& w) a
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    - I# }6 m0 y. }5 {( X& q+ b- c
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    3 G2 Y9 ~) H8 E# y  C
56. #define TCINTEN_SHIFT               20
    ; }, Z3 R: }0 `1 f  ^7 V0 ]& Q
57. #define ITCINTEN_SHIFT              21
    0 i$ d6 o& x4 ]% s) `
58. #define TCCHEN_SHIFT                22
    ! f4 E0 ]5 Q$ k
59. #define ITCCHEN_SHIFT               23
    
60. 
    : U9 N. }3 Z) u" S
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    # `8 M0 P5 v2 y, B. H) J  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. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    - a- ~& Z3 O% z% y+ o6 n
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    6 r% ?/ [6 L7 Y& r/ t" y1 K# ~
76. char *dmabufdest2 = NULL;
    # a/ R6 X5 {% Q; M
77. 
    4 {. Z8 ^* d9 j5 a
78. static int acnt = 512;
    : P( R$ ~5 U7 Q& N% W
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    + q9 |7 ~0 \# ]) F
81. 
    ( p3 u3 o- v1 ]2 x5 m, R5 D4 i
82. module_param(acnt, int, S_IRUGO);
    - k- e. f% Z! k6 u& u9 j1 E: c
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

& D. L$ ^, e9 Y7 b' I( G
      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
- {6 f5 A' s+ h: m7 {% Q1 _! yarm-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$ @" u$ i( W
% i3 v; h0 v3 d8 G9 F