OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   8 U/ K4 D, {( \: r/ c6 ~. u) I; B) p
4. *
   
5. * brief  EDMA3 Test Application
   9 t! r* ~1 c3 A- 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
    4 F5 k6 R5 h/ a1 ^
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    . ^  T# e: T& {3 [9 |) \
15. * This program is free software; you can redistribute it and/or
    & U9 W6 W  |$ ~, M; [
16. * modify it under the terms of the GNU General Public License as
      }$ E- `0 p1 ?( H1 L3 f& P/ {
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    9 x; [) g- i7 X+ L; }
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    3 n4 q* [, c& y0 W
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    7 y' _: N. `9 ]0 Q# _. A
28. #include <linux/types.h>
    5 x$ \3 r0 q8 r9 w3 {
29. #include <linux/interrupt.h>
    ) k* k+ {+ _7 Z# U9 ~. n( q9 K3 G2 H
30. #include <asm/io.h>
    , a3 I' [+ c: @" K& x
31. #include <linux/moduleparam.h>
    & }3 b6 v- z) n0 `6 g; D3 o0 a
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    ( G+ ^' k; j1 G/ d
35. 
    ( {3 [& N& `, c
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
    
42. /*#define EDMA3_DEBUG*/
    4 Y: k( M- H& {5 y# ^
43. 
    , m7 [( S, b" e2 P! V
44. #ifdef EDMA3_DEBUG
    9 S, p% k' }5 y$ k- ~5 t% Y2 e
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    ) u* a& w4 U- A! z1 D
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    8 i5 A6 @. i: ^' n4 O6 D; g# a
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    6 l  Q: s4 e6 `
48. #else
    - g& `# d) b: O# E
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    5 b3 X- `4 t, t, z8 u
51. #define DMA_FN_OUT
    4 [1 n  V) \' ^, H  s
52. #endif
    
53. 
    2 Y& b* t; n! `9 p
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
      p+ i. c0 L3 o! v/ i! P1 q- o
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    7 t) L$ [+ A6 A. P- C
63. 
    1 _' W8 t/ k) {# p. b7 X  A; a/ ]
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);
    
67. 
    8 s9 Z" t1 N# D: P# `" l
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    ! p+ F/ U4 B7 N1 M6 }( a: c  |
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    3 F3 Z2 C! K8 ~5 i
72. 
    , ]3 e6 ^; T4 A, \* @
73. char *dmabufsrc1 = NULL;
    * ?; u7 A1 q/ A8 Y
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    ( G1 L! m5 `- j* ?/ R  x) j- J
77. 
    
78. static int acnt = 512;
    / `2 H5 b$ s  M0 X& t6 k- i6 F
79. static int bcnt = 8;
    % r7 X4 H' i9 x# t+ Q7 i: P4 x, U
80. static int ccnt = 8;
    . `9 C5 \4 H) H+ U' b7 j
81. 
    
82. module_param(acnt, int, S_IRUGO);
      h6 j# Z# k2 L: b
83. module_param(bcnt, int, S_IRUGO);
    + |+ n5 i! Z" c* x  C1 h+ B, p! u8 U
84. module_param(ccnt, int, S_IRUGO);

复制代码

. \, V1 X2 L* T$ k7 X
' ?5 T* f4 D- L# X  x: N' 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
8 e% N' ~% p, U% E; N6 y# xarm-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。
# u* j. d8 K3 A. W: p: T+ D( z% r     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
3 i% A. _; H6 S) H- u
+ K# p+ k+ w% ~7 x6 X) N+ R