OMAPL138如何在Linux下使用EDMA3驱动

yyj

5 P& C9 m( a+ k; d

1. [code]EDMA sample test application
   3 v/ P- e2 q* ]/ s
2. /*
   $ e% `, @3 i( J. O: z7 N
3. * edma_test.c
   - R: Y  E3 @1 ~$ V  Z1 z4 X
4. *
   : v' Y! S; m1 t5 Q/ f
5. * brief  EDMA3 Test Application
   
6. *
   % a0 \( s% k# @' s) F. ?
7. *   This file contains EDMA3 Test code.
   ; O9 _8 y$ k* J! v! p2 C
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   7 F; }. I4 X1 J% b
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    0 Y4 \0 p$ g( x  i' ]* s; C) r) b
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    
15. * This program is free software; you can redistribute it and/or
    5 x8 z$ {0 O6 l; {
16. * modify it under the terms of the GNU General Public License as
    ) ~# I0 M9 J8 [9 U6 A& W
17. * published by the Free Software Foundation version 2.
    4 L2 E+ t: m; |  t: D& S/ I0 n
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    , z: C/ \/ w. Q# n( T0 [5 g% s. w
24. 
    3 d+ x4 e) Z6 O: n* B! C0 L/ A
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    ) P  y" {  o3 @4 V. ^) C
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    6 O1 P, J1 i. Q- ^
30. #include <asm/io.h>
    - S9 U* e* u' A8 s
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    0 H+ g8 B6 z& T' a7 b$ v  P; F
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    5 J" S4 F$ i0 F1 @: _4 H! B
40. 
    $ L8 u5 f: d3 F# R9 f% f# I
41. #undef EDMA3_DEBUG
    3 I1 y' T/ x) o$ \; G6 o
42. /*#define EDMA3_DEBUG*/
    
43. 
    6 }: d8 U( d) _: R+ d2 E
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    ( M( `% J: g, F$ h& o
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
      x) m% @1 C1 u8 K' C0 P" Z
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    & ^% T' D# W  W6 }. D; n) [) U
48. #else
    3 ]; r. {8 g) {2 v: |
49. #define DMA_PRINTK( x... )
    7 x6 j) U8 \9 ^& |5 i9 T4 G  S
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    / d2 s) s% j' S* R! T
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    2 }6 n6 C9 O; N  A" ^8 k6 h+ u
56. #define TCINTEN_SHIFT               20
    & {! w8 Q' ]1 D) x9 `
57. #define ITCINTEN_SHIFT              21
    2 H5 S  m! t# W" l  j3 f
58. #define TCCHEN_SHIFT                22
    ' ^. }  c( I4 U9 c
59. #define ITCCHEN_SHIFT               23
    & s3 Z* q1 L& B( l
60. 
    9 ~2 S3 r% Z, J, o+ L
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    : Q. \' g, E6 C4 _
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);
    / n/ f) ^( T9 L' T6 _
67. 
    0 s, Y) z6 \. O7 c/ e/ z
68. dma_addr_t dmaphyssrc1 = 0;
    5 i6 J+ Z  z2 f- i- @& f/ w/ I
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    ( e" h! p% b7 S+ q. K
72. 
    2 N( @) j2 ^: ~8 ?3 I, U* c
73. char *dmabufsrc1 = NULL;
    : @6 G! I! G" O- R4 L  Q+ X9 g
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    ' _& b5 }3 J- M' q" `- y4 S
76. char *dmabufdest2 = NULL;
    + G% L# n! T0 t- ]
77. 
    ) S5 ?; o* |8 C& M2 J# I
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    & p$ K7 c3 _3 ?
84. module_param(ccnt, int, S_IRUGO);

复制代码

2 [; v9 M  `" H: r9 f7 _
& x2 {0 l# G: D! f  X3 d      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
9 O# i2 k" F' ^5 |# c: Larm-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。
7 W, c$ q4 t4 d" W* F6 O     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
; e7 R2 }1 C) L
+ Y4 e4 ~* [6 J6 a4 m) V" p& t9 m
. [- m3 H. ]! z" o* r( H  S