OMAPL138如何在Linux下使用EDMA3驱动

yyj

, E5 \  Y' |0 o) |

1. [code]EDMA sample test application
   2 d2 r* Z' x: h/ G+ a- I
2. /*
   
3. * edma_test.c
   8 _, S. S( e! ?7 d
4. *
   4 k( |* U- F3 x
5. * brief  EDMA3 Test Application
   
6. *
   % ^; X% p" ]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
    
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    6 G7 @2 U, a4 A* a0 d" s
14. *
    
15. * This program is free software; you can redistribute it and/or
    ( S3 z; g3 ?4 v  W$ s8 c% N, F
16. * modify it under the terms of the GNU General Public License as
    " Q3 m% ?2 ?" C- C; R+ N
17. * published by the Free Software Foundation version 2.
    0 G# Y5 D' \  H  T
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    6 ]5 E1 K4 @& i2 G) ]
20. * kind, whether express or implied; without even the implied warranty
    : n# D/ l- b9 \1 F* X; j
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    . b. u6 `' B/ T8 a& P
27. #include <linux/errno.h>
    $ v* K4 b) Z+ u! e8 r; l3 r" _
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    5 {: w9 _  q8 R
30. #include <asm/io.h>
    / `/ j8 O$ Z! Z- K" c! ~! B% S! o2 e
31. #include <linux/moduleparam.h>
      r9 `; n. |( \7 L6 w
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    ( E2 [/ u. ]2 o" U6 j" g& {
36. #include <mach/memory.h>
    " C' ~+ j0 ?7 F5 l  Z
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    6 E! \8 {! J$ l; |5 ?
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    . N) ]1 a0 j% B
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    & k/ q! R0 F6 ^; L  V6 B( X
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    , C+ ]1 O) R: Y
48. #else
    3 `* w- l& i8 c) v0 c
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    4 M8 W! {. R, b
51. #define DMA_FN_OUT
    
52. #endif
    5 o: r7 h/ g7 ?' l
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    & ?5 L, R" y: G. k2 L; D6 ^& {
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    ' A, I# D- H' [# I0 N- F2 C
61. static volatile int irqraised1 = 0;
    ; j6 S) G, v) O: [" p' o
62. static volatile int irqraised2 = 0;
    ; z# G7 |0 Y# R' T; J" Y( G) X3 V' p
63. 
    9 V! ?- E8 a: E; B, ]+ s. l4 y
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    - C2 u7 C6 T( j% i
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);
    . ?. C3 ?% f/ g! d' \
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    0 D) h9 o8 M6 Q9 d5 B  O; S
70. dma_addr_t dmaphysdest1 = 0;
    # J- n" h  ]4 O5 G& ~
71. dma_addr_t dmaphysdest2 = 0;
    : h6 m/ s9 U7 M3 Q* R
72. 
    4 a3 X. k3 h: F3 k
73. char *dmabufsrc1 = NULL;
    9 C2 a* a: X% O' t
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    2 T+ K. B% t# |) T  k* C, Q$ P
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    9 F* k- j9 H& r
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    ; ~! J5 H. o6 s" g  ^
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

0 L( b) c" R) z
/ Z) v1 ?, k) Q' l  v# G8 _0 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
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。
* X+ p0 F+ m% `0 }     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
% |( _! S% h0 d4 Z7 `( r* y
" E3 T& R" T1 [6 ?- o8 {
! \( E; C! C2 b- B+ i