OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   / h0 }# I/ z' S( v1 c- _% Z
2. /*
   
3. * edma_test.c
   * V2 N& E" \; y1 D. s% s/ t; R9 e
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   ( j5 z  I( \/ V5 `6 H8 o& j. s. b2 ]: i
7. *   This file contains EDMA3 Test code.
   
8. *
   ) v5 o" r6 j+ D* q# D$ X8 ~
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   . S. ^+ e- q, U/ z
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    5 e( E- j, j. R+ U3 P$ h
11. *         TO CHANGE.
    $ i2 j% _, v* L2 \# R8 z& m& j% n
12. *
    , q: _: b* ?# j! f8 R
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
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. *
    4 S; _! Z' ~; n8 p- @5 I  U
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    - p0 h+ {% _1 F* b, P, u
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    ' W/ X5 D6 V* \( Z% i3 i
22. * GNU General Public License for more details.
    
23. */
    * d6 z7 t; x" q1 D; w
24. 
    
25. #include <linux/module.h>
    ) u1 k( I6 Y) D: l
26. #include <linux/init.h>
    $ w7 R, P: c- v) e. @6 Y8 g
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    9 J0 z- e# l0 g0 k# |# q$ g* c- V
30. #include <asm/io.h>
    6 v& j) r; Y7 l3 h' R4 }
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    4 K9 l+ E/ V6 C; B7 s  y: ]$ @
33. #include <linux/mm.h>
    # \6 c6 }' Q6 m2 n! B
34. #include <linux/dma-mapping.h>
    % o" ^+ @3 p. U: h
35. 
    5 {/ o5 ^6 j- y' h0 N9 o
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
    / f1 y1 I. {5 o( [& P9 K
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    & y; U; i6 l9 ?( j8 E8 U  q6 w' ]
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    ! ~2 x: z: Y* G
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    8 i1 r, }& W+ ^* `4 Z
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
      n" X' y* S8 |1 _: d7 u
52. #endif
    $ ]9 m1 c& K! M0 k' L- q
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    . P2 W# w' p# D
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    . @8 O6 O7 {7 U, _
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    ! P" a$ f" U9 I5 u
59. #define ITCCHEN_SHIFT               23
    ; C( {5 Z: k: A1 S  C8 A7 C1 c" S
60. 
    1 k- u& }, B6 z9 s
61. static volatile int irqraised1 = 0;
    ' U8 x9 \4 L( `
62. static volatile int irqraised2 = 0;
    
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    4 Y$ R1 y5 Y- H4 H8 {* }( {, [8 T
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;
    
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;
    3 D4 V( \* ?6 D
75. char *dmabufdest1 = NULL;
    % I$ A) Y9 e/ j1 _  a+ A4 k
76. char *dmabufdest2 = NULL;
    , C3 ?" r1 e: c1 u8 a, V5 k5 K+ C
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    9 ^8 M! N3 n: u# k2 H. w" z
80. static int ccnt = 8;
    6 Z5 F: S- t& M
81. 
    , G5 C! N( p6 z4 g/ w
82. module_param(acnt, int, S_IRUGO);
    / t  C8 m  c* Q* J
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

' ]0 t- r$ s; w9 v4 |3 s
      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
3 ^. K" Y6 f' w+ G; Y$ L8 narm-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。
; }6 n6 ?) p6 v2 r0 w