OMAPL138如何在Linux下使用EDMA3驱动

yyj

) a# r0 S' W& T2 u( o' {

1. [code]EDMA sample test application
   
2. /*
   6 `' C  }! O/ b0 D3 G! o' c, L1 Z
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   6 K( I8 k( Y+ E% o2 t0 n8 p0 Z1 K
6. *
   0 Z; f, p" E: a# T/ p: s
7. *   This file contains EDMA3 Test code.
   
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   ! a' b$ G1 d9 e; ^# T( r
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    # I/ G0 P1 Y" I; Y
14. *
    4 l) D  [( g' {4 c, y/ Y5 X
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
    0 o( S0 F# ^7 J- Z6 \
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    : O+ }2 u2 _# \. d. A' M+ F& x7 i
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.
    # N! {3 B* |) J6 Z* y0 c1 ~* ]. r
23. */
    
24. 
    
25. #include <linux/module.h>
    & R) m9 \3 G1 W% i
26. #include <linux/init.h>
    / j+ Q4 _& m# B! Y! x- q6 s
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    : J4 \$ o+ L/ s, I
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    / a6 Q) i# Z) q$ q% Y, a: I
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    3 b; }+ a8 w+ V: d$ F8 b5 {; z
35. 
    + y$ g8 G; B7 p* E5 c" h2 l% A
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    8 Y- R2 A! Z; ]- Z8 h% d' e6 Q+ f( B, B) y
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    $ ~3 [5 l0 V* E! ~* G# k- a" [# O7 ?
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    ( b% ~) k$ T: j: a% B" w" N
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    * S4 S) I8 J: g4 r  {
49. #define DMA_PRINTK( x... )
    . O* |* L* S; \2 D# T# g& u* [; R
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    & M0 s4 u# g' s2 V1 y# M$ ~
59. #define ITCCHEN_SHIFT               23
    ! D* h- Q8 Y$ l9 ~7 ?8 v$ Q8 y
60. 
    / r; R  J: X$ S3 Y  C- _1 |8 e
61. static volatile int irqraised1 = 0;
    ) Q( J5 U: @" [. {  M
62. static volatile int irqraised2 = 0;
    : P$ G$ n. T. N$ r' I
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    * H; g3 A6 j% G$ c
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. 
    , t( J1 d. p, v
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    % X9 k# g' P2 {5 G% ~! b/ ?/ U$ Q
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    1 q1 r3 f  D! B" D' V: m6 n, r
74. char *dmabufsrc2 = NULL;
    2 b2 V& i: G* A/ x# o3 g+ O% ]9 f
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    6 ^# ^; y3 C5 T9 W
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    * f7 v( ?0 V$ z% L
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    0 W* d; x' d0 y  v3 s
83. module_param(bcnt, int, S_IRUGO);
    " u  t; v: Q0 s5 ^4 X5 j% x, |
84. module_param(ccnt, int, S_IRUGO);

复制代码

! _5 A: `" Z% T1 u. P6 y. c0 y
      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 L  ^9 m5 i1 |+ B/ ~( D! Farm-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。
9 [# l3 K; K1 Z) V: y
' @5 }: ~$ b, g* I& e
! A, b1 I6 f1 \, V- s+ v/ a