OMAPL138如何在Linux下使用EDMA3驱动

yyj

" G3 S2 H  H$ S" r* C: y) q# S

1. [code]EDMA sample test application
   9 U: s4 R, O( K9 w8 V6 r  a7 |
2. /*
   
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   ) e9 m5 N9 l. |9 X
6. *
   9 V: A0 {- M6 V9 W  u& H0 d' i
7. *   This file contains EDMA3 Test code.
   
8. *
   : p4 ?9 }2 N6 y# ?
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
    3 H* [) b2 N- O0 B( O" h, k
11. *         TO CHANGE.
    ! G" y0 w- L2 q6 u. q
12. *
    & p$ c6 h, \) x: C1 b
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    / f: p) j! H- N3 I$ }
14. *
    - S. {4 ~0 Y' E; i7 f1 U
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
    % p! Q1 u: j0 y6 V% o& N  S
17. * published by the Free Software Foundation version 2.
    ) ?2 z# \9 Y0 m* w. A
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    1 ?9 }+ p1 H" g( G5 s
20. * kind, whether express or implied; without even the implied warranty
    # q# g! P8 Y( x
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    & f/ [4 E$ @- F9 |
23. */
    3 A4 x" C% S" H+ \- P
24. 
    3 s! `9 l6 p8 x' y
25. #include <linux/module.h>
    1 E, {* O' B/ Q* b/ q. I% x# ]* I
26. #include <linux/init.h>
    0 G' \2 q& Z$ d4 S, ]
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    ! ^* j2 F: C% t1 h  R; p# v- [
30. #include <asm/io.h>
    1 Y/ s. ]' p) u  N4 L
31. #include <linux/moduleparam.h>
    / B4 R9 J9 g  W$ r* z
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    2 q# I2 ?9 `& A8 C- l6 o! F$ [" e
34. #include <linux/dma-mapping.h>
    
35. 
    ( S# G8 s/ z. \  ?6 |
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    $ A2 C  ]+ a) @! [: i
39. #include <asm/hardware/edma.h>
    6 G. h/ A! D$ M' u6 O( n/ b. F% h! Q
40. 
    
41. #undef EDMA3_DEBUG
    ) o4 V9 r. y  a0 g5 f
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    ; e* r" A: r4 l4 c+ b
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    ' G8 A, q* ?3 g) F
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    2 ?. z: b# U* m+ B( G
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    # R  S" c" s) z" s: e, c* J
51. #define DMA_FN_OUT
    2 n* @" k5 f5 W; ^+ @
52. #endif
    - f. g7 _& [# j/ _! }# Q
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    * x2 R% e. F$ u3 b7 H  n" W
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    + r! l$ R$ A2 I8 \: ~
59. #define ITCCHEN_SHIFT               23
    
60. 
    
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);
    
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    $ b' q3 {2 f! D# U  q/ Q3 A) V
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    / j  X7 _( s2 d. `& I) G
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    3 v2 S6 z; ^) Q! f1 k- N7 T  b
69. dma_addr_t dmaphyssrc2 = 0;
    , g% ~2 N& e/ K& _0 Y" i  M
70. dma_addr_t dmaphysdest1 = 0;
    ( l0 c0 X0 p( t
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    ; q: D; b$ a  q/ T6 {
76. char *dmabufdest2 = NULL;
    
77. 
    " J0 z1 g8 G& U& g7 x4 e" k: u
78. static int acnt = 512;
    
79. static int bcnt = 8;
    - l/ y0 }( D8 R3 `' [( o; I
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    + X. T" ^0 T8 Y
83. module_param(bcnt, int, S_IRUGO);
    4 R9 h( q& Z; r
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
! Y9 q2 ^) A3 Y' v0 ~/ m0 j% harm-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。
# }' x$ ^( R  s; C     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。


1 W: }5 m! a3 H" i