OMAPL138如何在Linux下使用EDMA3驱动

yyj

' ?8 w& t: U' l0 \1 c

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   4 H8 d( x. a5 d$ I
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   + H* T5 m% S# `# \  A
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
    
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    ) U% q2 T& }4 ]% \. p% t, {
14. *
    # Q0 g4 {  E: K  a- k2 H3 p4 e5 K
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
    0 [# B6 P6 h: ]$ W/ Z( U: N) F" ~
17. * published by the Free Software Foundation version 2.
    ) B% M2 I4 n7 ]* u0 I3 \
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    & P5 M3 K: d& A
20. * kind, whether express or implied; without even the implied warranty
    ' T+ ?) {1 b. |3 B3 m
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    ) `9 T+ w4 P1 R9 t( S9 m3 B; B
22. * GNU General Public License for more details.
    & \  @) ^. D0 N/ X  M
23. */
      |4 u) d  F" H6 o
24. 
    ' I- K( i- v0 _" [4 g5 N4 j% x
25. #include <linux/module.h>
    ! G) P& g6 B% l. ^8 J
26. #include <linux/init.h>
    ! }$ S7 O! E) G% U2 Q  d
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    : k& o- V& f4 g2 T" \( @/ Y* ]
30. #include <asm/io.h>
    5 e5 A, y! H4 Q# o9 ?( f
31. #include <linux/moduleparam.h>
    ' Z3 }6 e: G+ q# K( m9 s$ f
32. #include <linux/sysctl.h>
    : @) y# a% g! S' B8 m! o- X
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    5 i4 {/ }9 _) u5 t# D
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    : X8 s5 d5 L  W* M/ T6 S
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    9 b. s# U, D* C$ U: d8 [1 U
41. #undef EDMA3_DEBUG
    ; j& W3 p, `* e1 V- A* k, o
42. /*#define EDMA3_DEBUG*/
    0 W3 J* P* ?6 q: r9 F+ U0 W
43. 
    , w9 ?7 v  H9 C* J1 n7 y. 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__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    ) b8 t# z/ S$ A! k
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    / r+ f0 v) z' s+ r0 L
51. #define DMA_FN_OUT
    2 c% u/ }/ Z$ G+ R: R2 }- J
52. #endif
    
53. 
    " g9 q9 W1 n0 [; D8 F% y2 A2 t
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    . @4 I/ b7 w# D; R" f
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    5 g, O" ^0 t- [; I) Y
60. 
    & Z! V8 g5 \$ ]2 f. u) G% `4 _
61. static volatile int irqraised1 = 0;
    ; S" M2 ?* H7 i( v
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);
    
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    % u# Y6 C8 S" o# K
68. dma_addr_t dmaphyssrc1 = 0;
    , z  Z2 W) W  j7 G
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    8 ~3 H/ X- c3 m# {* X
71. dma_addr_t dmaphysdest2 = 0;
    ! I" |& {3 `# l& o$ U+ [
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    - B' M2 J# r4 A; P7 H* t* `
76. char *dmabufdest2 = NULL;
    6 o3 k7 {: n$ }* B( C: [
77. 
    
78. static int acnt = 512;
    + {, a/ U8 p3 W3 l; c) r' h
79. static int bcnt = 8;
    0 P. r7 R5 w# u- ], V! |# Z
80. static int ccnt = 8;
    - k# o$ N/ r, Y" t+ R! V6 e. r
81. 
    
82. module_param(acnt, int, S_IRUGO);
    1 U) P. a/ }; b3 }% D
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

- x* c7 x' D% r) `3 S5 X$ {      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
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。
     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
' `% k+ J  H( A