OMAPL138如何在Linux下使用EDMA3驱动

yyj

9 c, b, N/ x1 I: O+ `# W

1. [code]EDMA sample test application
   , h7 u- o3 }1 C3 W, U
2. /*
   + d8 S' X' x. S  R
3. * edma_test.c
   
4. *
   8 O" b% t# j3 @7 I$ ^* w
5. * brief  EDMA3 Test Application
   
6. *
   2 g  o1 `- |; f" R7 E
7. *   This file contains EDMA3 Test code.
   / V& Y) |5 ]6 L# G" O0 B& {4 q
8. *
   # d: M$ F* M; w9 ?
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   $ q; ~$ t# a9 t
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/
    + \$ P/ I8 S5 p% {8 Q
14. *
    4 U4 Y+ G% L, A
15. * This program is free software; you can redistribute it and/or
    ! y( H3 T. K* C. u! ^
16. * modify it under the terms of the GNU General Public License as
    ) X% Q  |1 [0 Y& a  d  X7 [! J/ @
17. * published by the Free Software Foundation version 2.
    
18. *
    / F. }8 l# f* J9 Y3 l% d- i! o9 N
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
    1 X* R; `8 f! q) B7 k( B: C
22. * GNU General Public License for more details.
    
23. */
    
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    ( y% `$ ?, B( f# W7 N8 r- t' X% \% [
27. #include <linux/errno.h>
    2 V" S1 }6 [8 E+ f. H& E
28. #include <linux/types.h>
    / b/ ?# y4 w' P( r# \6 V' G' q# _
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    0 p* a' R  b! m# |9 r4 o
31. #include <linux/moduleparam.h>
    4 O# E. Q2 A- }' h# w6 [1 o
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    + Q/ O3 D1 |; a4 d
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    4 C8 x3 |2 i0 g2 K5 C  B) V, T+ L
38. #include <mach/irqs.h>
    + Q3 \: L; r9 o4 Z( H: F& J
39. #include <asm/hardware/edma.h>
    7 }: e& @$ e3 v
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    5 x% @# l! Z, T8 I' m
43. 
    . a4 Q* ]3 \6 K" O4 R
44. #ifdef EDMA3_DEBUG
    & B9 a/ c' K; x0 z9 ?
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__)
    1 g+ J$ N% M5 F. o* Y/ U7 B
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    9 b5 \& t8 F& Y' X) O
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    9 Z$ [, T- a, y8 u6 o. V
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    + V/ g8 T3 C$ ]7 Y+ I
58. #define TCCHEN_SHIFT                22
    1 ^$ m. v$ g: B1 }5 o: G0 E2 ^
59. #define ITCCHEN_SHIFT               23
    
60. 
    ! @" z: J1 k1 _7 {  _
61. static volatile int irqraised1 = 0;
    7 s" B' O6 Z4 U) {, R/ `6 V8 s
62. static volatile int irqraised2 = 0;
    6 `6 g$ @/ N) |: E  O
63. 
    * W* S7 l3 v( J' g7 Y$ x- T
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    5 n$ k$ c# O3 ]! O
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    2 ~0 _/ p+ q( r3 G3 D6 b2 \
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    " B- b/ Q' g! n9 b
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    7 M+ @$ d; Z) q; W% z  G* M
72. 
    
73. char *dmabufsrc1 = NULL;
    & w. X9 c. m% l* U3 `0 a, b. O4 w3 L
74. char *dmabufsrc2 = NULL;
    / a, L/ @0 r5 T
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    + [: W( T$ H5 L0 l0 {! ?/ j2 j1 s4 l
78. static int acnt = 512;
    . |& b! q" H/ q4 {4 b; Z6 t( |
79. static int bcnt = 8;
    ( l3 Z$ q7 I0 x2 X
80. static int ccnt = 8;
    " W7 Q1 j6 F/ T. l. n' U' \
81. 
    
82. module_param(acnt, int, S_IRUGO);
    2 m# b* I5 t+ y" h; q
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

! X0 ]. m2 q9 A. e1 n. E
      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
, V" x9 s6 k3 s& `6 V) Oarm-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。
* {# B/ j; U7 S7 @4 y