OMAPL138如何在Linux下使用EDMA3驱动

yyj

! X4 }; U2 D( V6 Z  r7 F$ |

1. [code]EDMA sample test application
   2 a9 b7 A4 p  Q( E$ e( I
2. /*
   6 U5 ~2 S5 B8 [! D3 _6 N
3. * edma_test.c
   
4. *
   * q' k0 z, d% [) ~* f
5. * brief  EDMA3 Test Application
   
6. *
   ! J" u3 q  N$ [) |4 u
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/
    3 }: @! C; |' L: M7 G1 }
14. *
    
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
    
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    ; A" N  R3 Z0 S
20. * kind, whether express or implied; without even the implied warranty
    , B" {2 w0 @# s/ n# @2 v
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    2 n' T5 o& G: ]: ~
24. 
    : Y8 O7 A/ Z& b+ V" Z
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
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>
    7 o4 Q+ R0 N( j3 ], L
39. #include <asm/hardware/edma.h>
    ; |2 u. B" N8 t9 G1 O, X# A* V; l
40. 
    3 X/ \$ U& C6 F
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)
    ) u8 w; E6 z+ W' O
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    2 C( X5 k, W' Q. h  R+ k: R4 g
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    + T& c1 E* U( _  e6 y6 K) B1 E+ F$ ^
52. #endif
    
53. 
    # D! v' J/ x  a  Q* Y
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    * J2 Z5 \9 x4 V' m$ b
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    " U3 i6 k! p+ Z
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    $ W/ t# C; p1 v* j7 L# P, Y. ^
60. 
    
61. static volatile int irqraised1 = 0;
    2 _5 ^! f8 q/ K
62. static volatile int irqraised2 = 0;
    
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);
    1 Q' F8 R" j4 M
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    9 r; Y) ^0 M/ h- B2 m: \
67. 
    # H: L0 v1 i9 }7 [3 w6 ^& U. l) w
68. dma_addr_t dmaphyssrc1 = 0;
    . N2 p* q$ z7 N2 f: d. E+ r8 k5 K
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
      R' Q$ Y& c2 F
71. dma_addr_t dmaphysdest2 = 0;
    3 p' ]  {, Q/ d) {
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    + v& x1 w, I" Q" F$ e9 _
76. char *dmabufdest2 = NULL;
    % R; |+ P6 [! b8 W' E2 e! i
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    * O: t9 O+ w# m2 L) u9 n3 M
81. 
    1 @2 Q% u3 u: n! G, R3 _" _% F' ?* F
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

: u" H2 N+ T; k1 w: K3 ]; i
* a. p' _, i; |2 j0 V8 _5 |      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。
5 c2 M3 j: ]9 q" u& H' d; j     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。

. e) [1 H. T  ]+ G. L2 I( s
9 H! y$ e) d5 q% V9 p