OMAPL138如何在Linux下使用EDMA3驱动

yyj

* P! ]7 ]# ?3 x

1. [code]EDMA sample test application
   
2. /*
   & v0 y: J2 q8 q1 J
3. * edma_test.c
   " v0 f; ^8 S* ?9 |( _8 }
4. *
   
5. * brief  EDMA3 Test Application
   . O9 p; M3 ?7 @
6. *
   
7. *   This file contains EDMA3 Test code.
   & c6 w8 P0 l0 d
8. *
   5 G  D  `3 @4 c  e
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
    : b, i3 q/ Q0 f2 o
11. *         TO CHANGE.
    - d. |% ~+ N8 V* L6 E& x
12. *
    $ B% q9 `2 D1 n( m( l  t2 ?
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    ) k  }$ e9 A- J4 U, {! C- E% G
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.
    4 I$ P, L1 c7 ?: x3 p
18. *
    7 k' e0 G* a" ]$ G+ s% c' _% m
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    * S5 A' r. R$ ]* O1 p
20. * kind, whether express or implied; without even the implied warranty
      {$ T: y7 X6 i2 T
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    + r, v: m5 ]$ ~
24. 
    
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>
    6 [  l$ T- ?' M& b9 i1 X
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    ) G+ ^! `6 q& f
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    / l9 j1 u: A/ j. L! V1 n2 ?$ G
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    + `# }/ M& u+ @0 t& l$ h  e$ p% U
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
      A/ B9 R0 p: h
42. /*#define EDMA3_DEBUG*/
    9 |2 p! U6 F# X) O
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    ' F# P  ?1 F1 \$ c- x& ^
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    9 p; S! D7 c  m% @% u+ S
48. #else
    % f9 A3 E+ s( Y, I, a+ L
49. #define DMA_PRINTK( x... )
    + M/ P( ^7 @, }6 D  A
50. #define DMA_FN_IN
    5 O5 h, O7 J; `6 N2 S
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    ' V9 Y, V9 ^5 [+ ~1 e% {# l
55. #define STATIC_SHIFT                3
    . v, g4 k- J! K$ ]1 H2 c' W
56. #define TCINTEN_SHIFT               20
    + C. c+ F3 q4 P  Q* H* n
57. #define ITCINTEN_SHIFT              21
    9 k7 C7 o3 ]  v6 S; K  U
58. #define TCCHEN_SHIFT                22
    ' y& X& F4 U5 s% u- b, X4 i
59. #define ITCCHEN_SHIFT               23
    
60. 
    0 `9 ~$ C& i8 Z* E
61. static volatile int irqraised1 = 0;
    ) E) M, e3 \! c* J
62. static volatile int irqraised2 = 0;
    ) q) p# @3 A* \
63. 
    7 a" q+ n2 n- ?
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);
    
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    3 {9 e- W! ~0 o# W  Q
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    2 L  Z! ?% `+ }$ \" J1 k
69. dma_addr_t dmaphyssrc2 = 0;
    ; E& O8 P5 `+ O: \- ]1 V1 F
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    + i; P: W7 y. m8 T2 Y
72. 
    
73. char *dmabufsrc1 = NULL;
    4 |- B5 d) P+ `
74. char *dmabufsrc2 = NULL;
    % a3 b1 w$ e0 C% @- B% ]* A
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    9 g* N3 ?/ O- j! @3 q$ Z+ x
78. static int acnt = 512;
    " ]. l# d7 v; q$ F) E1 J' ~% |2 K
79. static int bcnt = 8;
    & Q6 H* I: q, X* D! P
80. static int ccnt = 8;
    
81. 
    . @3 k2 a# @& c2 m
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    , v* c+ m. \/ r, Y
84. module_param(ccnt, int, S_IRUGO);

复制代码

1 c- i7 F* y. M* @
5 N. ]4 v. }' v) ^      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
, ~  y4 v; N1 O4 Earm-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。
- C+ q0 ?* r0 \7 E3 ^6 c) b     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
& g0 |" [0 \- C

6 S8 o& u; s6 L