OMAPL138如何在Linux下使用EDMA3驱动

yyj

0 Q2 O; h: s7 E- {. k, o

1. [code]EDMA sample test application
   
2. /*
   " R1 b+ }" H$ `  z' n0 A
3. * edma_test.c
   
4. *
   , V& j, ^; y& Q$ T% l  S- |% N
5. * brief  EDMA3 Test Application
   
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
    " ~0 Q; p4 S" Z+ @+ N+ e1 r- M, R: N
11. *         TO CHANGE.
    + _2 b1 o+ ^  v( X- m
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    3 e- B, m4 d" U* j2 G
14. *
    8 r7 \# O7 t* x  f( B
15. * This program is free software; you can redistribute it and/or
    2 E0 X) J' @. K  Q( F5 i
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    " F. ]% g; d+ d& F1 {# w( W
18. *
    ( p  o3 M( s2 G, O5 m  @0 U0 p
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    9 h+ @8 R+ |0 A) e$ t2 O: ^/ ]
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.
    2 ~/ y2 {! m! B8 x0 E
23. */
    
24. 
    % C3 V3 l0 V/ z
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    ( C$ _7 R$ R6 W; v6 a8 N8 R
28. #include <linux/types.h>
    " [! `5 G. K" r8 j
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    ( o7 N1 _5 b/ S/ j) u# {6 t: w. Y" h
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    - M2 R1 [6 {# a# T. ]/ P  B1 I( T* X' k
33. #include <linux/mm.h>
    ' j0 l: {; r. G" S) E& Y
34. #include <linux/dma-mapping.h>
    7 @# m, w* r( m! D4 z; w
35. 
    ; f( [& X* v8 F
36. #include <mach/memory.h>
    0 v8 G. ?5 B* r9 W
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*/
    . U2 S' h1 R/ n/ r, X7 ^
43. 
    6 W* i3 P  \5 V" m9 F! K3 T
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__)
    " l- c) s) j, A5 `. |7 u1 f& J) F* n
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    0 j  ?+ E# o: K
48. #else
      b0 |; P- G9 S3 w  d: ?# o
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    2 O$ G6 T) o: y
51. #define DMA_FN_OUT
    ! _/ d2 \5 f$ H  ]6 m. K
52. #endif
    * b' N. M" |' T2 S9 p
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    % J/ }$ h0 W1 u' k- ]
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
      f2 g1 x5 J& g( D
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    6 C  I2 y& [9 r2 }. _) E
62. static volatile int irqraised2 = 0;
    ; {, G( A( x8 q
63. 
    5 j6 h# \% J( x0 T  m: [
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    8 s5 e9 G0 Q2 _# G) U
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. 
    / ?4 @% e% Q* L4 c1 u$ `
68. dma_addr_t dmaphyssrc1 = 0;
    # m. `9 P" M8 K; z
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    " x8 A8 C5 g; x% e1 P  g
72. 
    9 O7 p+ m5 ^' s
73. char *dmabufsrc1 = NULL;
    8 P1 H1 Q, v6 \+ d: A
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    . t0 e: N) H2 q4 t  ^3 N) c
77. 
    3 \8 \6 U0 A2 c; {
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    - w2 ~. r% @/ B; {
82. module_param(acnt, int, S_IRUGO);
    ) k3 _/ O$ d7 b1 x! T7 y- ^/ H
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

      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
, @2 Z* b. R: ]. i* k1 m# ]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。
' P- z$ F9 B' 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。
/ O- F9 F3 A4 B$ S8 x1 z

. M$ O) U+ ]/ r; ~0 u8 e( [; K# p