OMAPL138如何在Linux下使用EDMA3驱动

yyj

2 V+ H3 J8 k3 E+ q% {7 y( ~5 O

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   , l# {9 D* ?3 a( K8 l% K
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   ( D, ^( [. z2 l; @1 H
8. *
   8 e' g  o( u4 |6 G9 q7 |2 S9 T  k* }5 C
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   0 O1 r3 U  Y8 Z) V9 r" v  w
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    6 @4 j; I9 P! v* e- @( l% }0 t; m
11. *         TO CHANGE.
    / j# I; G) b" j
12. *
    " h! `7 U: M2 |% |: k$ |
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    : [8 \) G9 M+ N- a6 }
14. *
    
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
    / I) `# v. T: ^! {
17. * published by the Free Software Foundation version 2.
    : a/ u6 r! ?4 f
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    * d" N0 ~0 L. M  o) I
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    ; a5 Y- b/ G) [. m
22. * GNU General Public License for more details.
    
23. */
    # I4 @! t& a" t) O/ e  r5 w
24. 
    
25. #include <linux/module.h>
    ' m! }2 Z% ^0 A7 V! D/ h
26. #include <linux/init.h>
    : R( W/ X0 h' [; h6 {/ w
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    * o8 M0 `) {3 o9 o) z
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    ( X! T) z( G( v; [" A" L
32. #include <linux/sysctl.h>
    ! X6 a# W0 Y0 J8 O2 y% ^
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    ) k" l+ `" K5 h- J: V
35. 
    
36. #include <mach/memory.h>
    ! {; f# ?# m' P. Y; s- ^
37. #include <mach/hardware.h>
    ! H6 n8 h& F! v6 o' g
38. #include <mach/irqs.h>
    + A+ o" R/ ^$ m6 K  T. x! l
39. #include <asm/hardware/edma.h>
    * t8 c4 l' h% y2 @4 @- C3 R' \
40. 
    
41. #undef EDMA3_DEBUG
    / d5 d) @( X( r1 N
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    % M9 J$ {) ]# ^8 D4 m: X( c6 U5 p6 P
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    2 v0 u3 d2 F0 q/ K, K& A9 q
49. #define DMA_PRINTK( x... )
    7 g. ?0 P; E  L( Y. U) j; ^0 C
50. #define DMA_FN_IN
    1 q$ s% W  p0 j5 m
51. #define DMA_FN_OUT
    2 a# c8 x- I. Z' @0 [2 M
52. #endif
    * O+ @" U% y. i$ T* U2 p
53. 
    ( b. b5 k; b- Y) F
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    + {; t- H6 v. z% T+ G
55. #define STATIC_SHIFT                3
    7 M& t( h: E# i
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    " u6 a( e. a0 B1 F
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    7 k( v$ q, ~" w4 ~% B$ g
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    ) t4 Z5 W0 `: i0 i6 Z
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);
    % H$ ?) ^8 ~! m& H$ E# z/ w1 ~
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ; l0 j+ g4 {% t5 Z* q
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    : v% R/ l* |0 b6 g
69. dma_addr_t dmaphyssrc2 = 0;
    5 n6 P" v! x, Q" F: z. w" D
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    : H9 }1 H) Y" a* t, N
72. 
    ! Z3 Y9 r; m& a
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    3 C) L9 q/ f6 Y2 B; _- H* m" w: d
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    0 {6 a& l9 B& S% r) w
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    8 H' b0 E. u; E6 M
81. 
    5 m% E0 N9 n9 D$ ?. a9 V
82. module_param(acnt, int, S_IRUGO);
    % A9 P& b( y6 [
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

' ^' @3 {  A3 i, w0 ]7 b  G7 u5 R
. {5 k8 _0 [% @) F- 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
/ e# q0 {# G  G2 f' F; ~arm-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。
& g3 b( T- Y9 n! t5 n8 `. n     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 u; E/ \2 \# H4 p8 l
, [) A2 F9 g2 g4 v5 ~5 e+ Y
' ^* |9 S2 I4 M- r2 h& P