OMAPL138如何在Linux下使用EDMA3驱动

yyj

; f+ J7 w) z' z3 b# X) x  E

1. [code]EDMA sample test application
   1 K' X6 u, i# {) e1 I% m: p$ ~
2. /*
   
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   ' m2 C" L- b( T1 @+ S7 i7 u$ R
8. *
   ; [3 ~( [" p5 h2 u8 {
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 ?! D2 j6 v% `
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    / K& k9 s0 m5 Q( v/ v
14. *
    0 ^* T6 `5 s/ |; d; v2 L) F
15. * This program is free software; you can redistribute it and/or
    ; ]6 \2 H% @. O% U( U
16. * modify it under the terms of the GNU General Public License as
    3 b& M8 \8 [  G0 S2 ?/ e! a( y
17. * published by the Free Software Foundation version 2.
    * c. X6 a" a5 ]6 t
18. *
    + R8 J$ E. M* K6 z. e3 O
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    4 }: G1 S2 Z& F+ n# c% l) K
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    6 i, }+ z3 T% o. _  N, Q: |
22. * GNU General Public License for more details.
    
23. */
    1 ^% {0 b2 {4 u
24. 
    ; \' q- g  k- x7 P: o
25. #include <linux/module.h>
    8 j( K+ `, S5 c- P
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    3 [: H: U, W/ U' c
30. #include <asm/io.h>
    . }, R! x' b$ S4 u( y! v
31. #include <linux/moduleparam.h>
    1 v6 a' P; `6 S8 F, |/ I# K
32. #include <linux/sysctl.h>
    4 r% x+ v. L9 t6 ~3 S$ p
33. #include <linux/mm.h>
    3 g% X2 E  S( ^, l
34. #include <linux/dma-mapping.h>
    / o" f& Y7 D3 |8 O4 J* K4 y% p
35. 
    & c' A% l. s' ^" {& T" A
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    8 R; Y! u2 i% D: G, S, g2 Q+ q
40. 
    
41. #undef EDMA3_DEBUG
    " _/ d7 ]8 _( L5 |! ~( \/ E' S  ~
42. /*#define EDMA3_DEBUG*/
    & t. L* X; [3 x: _2 P* R
43. 
    
44. #ifdef EDMA3_DEBUG
    ' |! t5 o. n; {
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
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
    1 E, q: m/ o3 `- b
49. #define DMA_PRINTK( x... )
    # h9 G6 H% r9 k) |7 t  X
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    # R. B7 i$ J6 h. u# V
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    6 q: B2 ?9 O+ U9 u3 N7 u
55. #define STATIC_SHIFT                3
    . f. g" j+ v' P0 J, U3 J" V% d
56. #define TCINTEN_SHIFT               20
    " w; _# \2 F6 J, Y. }% r8 w
57. #define ITCINTEN_SHIFT              21
    0 c' `8 R+ o+ ~: t* W
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    ( ^: B5 Y# O8 o5 P* b2 M
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    6 H  d& H- N2 F  e
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);
    3 [& ]) O/ e! x; P. n
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    2 \/ U6 _# u6 b. c3 c
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    ' ^5 c# C8 K9 V! J8 v4 @
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    2 V& n; {- T7 p
71. dma_addr_t dmaphysdest2 = 0;
    0 g2 r  ^9 H/ c1 o
72. 
    
73. char *dmabufsrc1 = NULL;
    ) H* ~% L( {! N- D/ Z; N
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    ; v4 l; T! ^' g2 X- Z
77. 
    ) |% [6 i9 t) U+ _
78. static int acnt = 512;
    $ Q% P( p( Q6 F
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    9 u  ~3 q% J8 t) L: w- A$ R
81. 
    
82. module_param(acnt, int, S_IRUGO);
    / ~( i6 k$ R! O. w% k
83. module_param(bcnt, int, S_IRUGO);
    6 u9 A: f+ g" N" a% ?$ C2 h6 `
84. module_param(ccnt, int, S_IRUGO);

复制代码

" ]) b1 W6 l0 }2 B: i2 w
. {4 G. G2 j9 u; q      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
1 b9 o" M, d  s  tarm-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。
6 I- Y  M, K$ q- X5 H     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
. L: p: y& ^* f2 ?+ ?4 P
' C9 \6 |! a6 J7 a' a# X
" P6 k& s0 d1 e% k  j