OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   ( ~7 R# o, E" s2 h% B( n
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   7 A1 s" Q9 _+ f5 S' v
7. *   This file contains EDMA3 Test code.
   0 ]( a8 ^: m( T) g" P: z, |" C6 N
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   ; O* p, b. ?6 O# L$ Y7 ?
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    / p8 X; g9 f7 I2 f. U$ l' h
11. *         TO CHANGE.
    ; h7 l& R7 z) E* x4 v' l
12. *
    / I3 Z1 E* }1 f+ x8 u( C
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    , ]& ~2 r! B2 S$ r
14. *
    + [6 ]/ t& a- N: q
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
    7 Q8 j" `  H& q, ^7 s
20. * kind, whether express or implied; without even the implied warranty
    + n8 D, Q0 j( N) x$ q
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    ) R0 U) ^" `% F" Q* R4 L
24. 
    - q0 c6 L+ Y1 m1 \1 b5 y2 i: b
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    0 Z$ r' h1 R' ^9 P1 z2 f
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    ( O/ W2 C0 q% i7 A6 t9 [
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    7 }. b0 P+ V% g' W3 t/ |# v! m2 F, s) E
32. #include <linux/sysctl.h>
    2 c: t7 D# ^0 }
33. #include <linux/mm.h>
    % R7 |3 C) u2 f7 }6 Q7 r
34. #include <linux/dma-mapping.h>
    # n: L" Z, V0 k
35. 
    7 t8 K& o/ t3 g) F7 d8 X
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    4 t- E4 b9 @$ t( `
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
      [+ @- \. W# g% O
43. 
    
44. #ifdef EDMA3_DEBUG
    3 @9 ?$ {3 t- m- U
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    3 Q" K0 X( [. ~4 _. h" X% S$ B4 K
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    2 t4 u# D; ?" o* G6 [
52. #endif
    $ F" n7 W# G& t
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    5 k7 B2 z  X) V- d
55. #define STATIC_SHIFT                3
    % N4 x6 O- z3 K6 h
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    5 U$ u" v; n+ \! ^- Y9 J3 V
58. #define TCCHEN_SHIFT                22
    ) C; ]" |) F4 R% Y, P7 f7 D
59. #define ITCCHEN_SHIFT               23
    
60. 
    7 d: J1 m7 J- ^$ n
61. static volatile int irqraised1 = 0;
    ' x$ U5 K# \& K* |# n
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);
    9 J8 O, _& v7 D' U) V2 g
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ) t, s6 {8 E- ?! x/ h7 G: \: A; Y
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;
    - @1 ?/ |' a# }8 a4 y9 w4 I# p
72. 
    
73. char *dmabufsrc1 = NULL;
    0 e$ A8 j& t3 F0 g# }
74. char *dmabufsrc2 = NULL;
    5 o- O3 {0 g2 c- ]1 i9 c
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    " T/ {/ W- C% z: O
81. 
    + h$ R, y# W3 y' u/ M
82. module_param(acnt, int, S_IRUGO);
    1 U6 ~& l* }2 e8 c, e% q; y" U
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

! a9 Y( u! D2 @  T
      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
/ l2 u: m# {3 v) T: w: j( w9 Jarm-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。
% X  v$ c- J+ `! t- B7 J' F
+ ?4 I! \6 r5 j7 v; S: {