OMAPL138如何在Linux下使用EDMA3驱动

yyj

5 \# y, Z4 @' G8 f

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   
4. *
   ( X! s0 Z3 c# o( V6 s
5. * brief  EDMA3 Test Application
   + {, e) q5 i) s* ~1 K# R3 M: J
6. *
   7 z: v! A8 y3 B% b- h
7. *   This file contains EDMA3 Test code.
   " q2 f& ]+ U. L! }" M
8. *
   # N/ l0 A$ ^- Z0 d* c6 g/ J7 O- ]
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
    / E8 P# _% F0 @1 m% @8 ]  t# c
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    * u/ h0 \- c4 N- T( Q
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
    9 t5 |+ N% C& D( D) `
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    4 s7 O* i+ |1 v$ b
20. * kind, whether express or implied; without even the implied warranty
    , R4 {; G0 [2 q2 _$ H
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    , z3 H) d- I, ]0 |
22. * GNU General Public License for more details.
    
23. */
    . i) P% k9 j1 |' g4 g
24. 
    
25. #include <linux/module.h>
    ! j  v) P  Y' F! Q/ q
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    / w" ^. K: _- q# O3 v( R
28. #include <linux/types.h>
    ! v3 a, r, F& V& l& a, L2 W
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    ( c) l% i1 M- g
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    4 U1 {  f8 r! i: l) i. l% o
33. #include <linux/mm.h>
    2 n/ R! {! s  S# B; V
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    - T# p% N7 m8 [1 [. w8 O
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    - A+ c! l9 _. \+ {( ]2 l
39. #include <asm/hardware/edma.h>
    
40. 
      m- }  B9 u& r& [, L, z
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    & g/ S4 ~) t) B3 ~3 r: i3 D3 _
43. 
    / x/ g! O: E! ^( c5 O
44. #ifdef EDMA3_DEBUG
    4 I* h- K4 U1 ~* }% j! S( x( l
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
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    ) c# [4 H3 l# o7 e" i+ f2 x* v
51. #define DMA_FN_OUT
    . w& Q- @9 H- c& ^
52. #endif
    9 q9 [2 J* u" v4 A( ~+ h7 x( d& h/ `
53. 
    9 @7 @- {/ K7 w" Z( ^- \
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    * X1 E) Z& O1 S% E% N
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    , H9 H- X. n" _* K* O
59. #define ITCCHEN_SHIFT               23
    
60. 
    $ ~4 F/ V$ Q. x; d) P9 c: E& ^
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);
    2 a4 U. B( G% y7 z: Q: I3 S" O5 D
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);
    ) m7 p  h6 F6 F3 [' f! _
67. 
    * z. r- J* v) q' V) M8 U# T
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    , M% o# f  A! A3 ]
71. dma_addr_t dmaphysdest2 = 0;
    7 _& `9 k* ]& h, t7 M
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    ! q& D; y" b$ ~' d9 d; y5 M% W
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    . |4 h) c# M3 e) H! j- r# N
77. 
      ?9 Y9 w7 S8 y1 v/ e) E2 e+ ~# l
78. static int acnt = 512;
    $ R2 f# e) m! ^4 l( D1 {
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    1 H) x& L9 S  e3 V* s+ X+ u# X! J$ c
81. 
    
82. module_param(acnt, int, S_IRUGO);
    ) F* u* X6 x9 V& B& G1 i
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

! ], J3 G$ G0 \0 j% A& H; Z/ ^
      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
) o8 q' t$ t& J) i7 k) j+ e1 \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。
8 S  N' V9 \9 m2 \; Y% ~     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( v2 U8 q) y- `+ n
, ^" w4 n% d! G2 l+ `+ o