OMAPL138如何在Linux下使用EDMA3驱动

yyj

1 s% O. C/ D; O- a  |% X7 L; g

1. [code]EDMA sample test application
   / k: f# Y5 b/ @3 r7 c7 U
2. /*
   
3. * edma_test.c
   $ t9 h1 r/ Z. B+ c5 ~
4. *
   + w! d' p; w- H# z6 i
5. * brief  EDMA3 Test Application
   , g, J4 U; D) \; J7 k. u6 \2 B
6. *
   
7. *   This file contains EDMA3 Test code.
   ( g; e3 V- u7 i$ _. Z- z4 h; G3 R
8. *
   6 H2 |1 D% i0 K4 l) O) ~
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   , H' t3 i3 k1 W3 i
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    
12. *
    ! c7 F5 n  A; T% i% R4 P
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
      G2 j8 J4 R% u; e% M3 C
14. *
    
15. * This program is free software; you can redistribute it and/or
    5 H( N& I# v2 O# ^( ?/ F
16. * modify it under the terms of the GNU General Public License as
    9 [. b6 g; V( m5 e5 l  h# U
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    + j+ Y  i6 C, @/ N9 C) N
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.
    4 k5 M5 X( g: n- w' |. t* j
23. */
    
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    3 [5 x# u( ]$ P2 |; S0 V- N
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    2 S3 j" F6 H* m* H. S; ~
30. #include <asm/io.h>
    $ u: H2 s2 p1 U1 J9 ?
31. #include <linux/moduleparam.h>
    / x3 f- @4 h$ A; M4 S
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    7 S' A3 y" C0 m$ D* H8 _
35. 
    9 E1 {9 q4 B6 \( V, T2 ~* t
36. #include <mach/memory.h>
    - j, Z' V; }; @5 P
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    8 }6 C, T, z# G4 R4 s
39. #include <asm/hardware/edma.h>
    : Z2 R0 a: f3 f; s
40. 
    5 ~0 ~7 `* \$ g. F5 y( @
41. #undef EDMA3_DEBUG
    * \9 n$ P/ D" S6 @; A
42. /*#define EDMA3_DEBUG*/
    " v0 X/ m3 i" C
43. 
    
44. #ifdef EDMA3_DEBUG
    * P* o$ K1 i6 ]/ {' H3 v3 u
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    & Y  U3 d4 ^- J- h$ E6 `
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... )
    
50. #define DMA_FN_IN
    # [4 R4 K3 n; x' O; Y, v& p: c# o
51. #define DMA_FN_OUT
    2 {, A/ v* n! H
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    8 j- b6 A6 m8 @' U0 O- o* M! p
56. #define TCINTEN_SHIFT               20
    . M& ^4 b) ^% L9 c* l2 b: i) ^
57. #define ITCINTEN_SHIFT              21
    3 X/ S+ K- F- K  A( t
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    : L2 a, c6 h5 o$ t. b* A* i( @
61. static volatile int irqraised1 = 0;
    7 _8 C+ @9 R- W
62. static volatile int irqraised2 = 0;
    0 L9 V0 [) s: k: a" a
63. 
    / T6 N8 e/ E0 p
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);
    6 ~8 l, v7 j/ u4 Q' M1 @
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;
    . b  W% x& r$ p" r, q3 R$ O. Q- C
69. dma_addr_t dmaphyssrc2 = 0;
    3 E/ L+ X* h4 l! Z7 s) H) j" ]' J
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    ! [; M% H3 O! o5 y( B
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    " Z# ?7 ~6 Z. l; @$ R1 U5 g- S
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    " x: B4 B" j& _0 V% k
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    - Z; I/ [+ x1 s+ Y
84. module_param(ccnt, int, S_IRUGO);

复制代码

* U% R0 v) m- z      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
/ U% Z4 p. v3 U& W' p% ~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。

1 @2 a2 x5 M$ ^0 V+ f
1 k1 J0 m; K+ ~4 C- m5 r