OMAPL138如何在Linux下使用EDMA3驱动

yyj

& \% _) E9 }" |7 _( N

1. [code]EDMA sample test application
   6 p" r% ~# c% x* Y3 C
2. /*
   - z: X6 G; c- _6 D3 u0 `$ F0 p
3. * edma_test.c
   
4. *
   6 e6 D- c3 W2 M4 l4 c
5. * brief  EDMA3 Test Application
   
6. *
   6 n8 u  g5 ]1 u0 Q
7. *   This file contains EDMA3 Test code.
   
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   * u# H$ s9 v) n* w0 j
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    % q& o/ _" r/ N; w& Y' t& [
11. *         TO CHANGE.
    ; N( {0 r; M+ h. I" G8 Y: T
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    / A8 T# ?" j7 B6 o# Z. D( v3 m
14. *
    & Q9 F& I; x) W
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
    ; j2 X  e2 A  r/ F
17. * published by the Free Software Foundation version 2.
    4 U5 k$ F$ W/ N* T
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    5 w7 l8 B$ {3 ^9 J: [. _. S# S$ I
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    & g! L$ u8 c( z4 B% V, K; T0 w
23. */
    
24. 
    * t) ~7 E: S. v6 M1 Z) ]5 |. y
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    . R: x2 o  C) X! E
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    4 j+ P0 [. r) Z2 q$ r7 i: u: [- B
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    % A% H3 R" f. O8 p2 J
31. #include <linux/moduleparam.h>
    ' @, C! v! Y6 }5 S. C
32. #include <linux/sysctl.h>
      x6 Q7 X# h5 O8 G! ]
33. #include <linux/mm.h>
    ) `0 C  d" [3 R6 t. Q
34. #include <linux/dma-mapping.h>
    6 t! R9 P5 f* B$ l
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    ) d* x# U  I/ ^* [$ s
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    ! G1 _, [: x$ W$ v1 i) O0 n) f0 |
40. 
    
41. #undef EDMA3_DEBUG
    ! I1 u8 L; H3 C& I: E% H# ~6 M
42. /*#define EDMA3_DEBUG*/
    3 d/ W: w/ P- h, p5 s$ h* i: R. _
43. 
    8 T$ S" Z" j: l- O! @4 v
44. #ifdef EDMA3_DEBUG
    $ M) P0 W$ H' E! r8 n# M
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    ' Z9 L4 |6 L1 k& W2 }
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    - g* Y3 u+ B4 e' t% j7 K! s
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    4 w2 t# y: q4 Z
49. #define DMA_PRINTK( x... )
    ) ^# d) Q2 M1 i3 N' g* G
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    5 d  ]& T; t" d- U9 V1 H
59. #define ITCCHEN_SHIFT               23
    
60. 
    6 C7 ?- w, D# t$ C0 ^
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    5 q$ F/ F% k4 B
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. 
    - s% g8 a7 G; e6 \. J8 Z$ @
68. dma_addr_t dmaphyssrc1 = 0;
    9 e$ ^& W$ E) `2 ^  p
69. dma_addr_t dmaphyssrc2 = 0;
    ; a! H8 A* b1 W' Y3 z' w; S
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    3 D1 y. j# W, h; S% Z  B, B
72. 
    ( }6 B7 i3 R- A1 ]( C, r" I0 V+ d
73. char *dmabufsrc1 = NULL;
    ) F" r: Q' ?+ y$ u3 Y! d
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    , b* O( [6 v% B
77. 
    7 n2 B# q$ w% x2 ^
78. static int acnt = 512;
    
79. static int bcnt = 8;
    9 ^8 T$ ~4 L7 h
80. static int ccnt = 8;
    
81. 
    , r7 u( s) O) d: q9 D; G) b
82. module_param(acnt, int, S_IRUGO);
    # N, ~" p" d0 b! [8 r
83. module_param(bcnt, int, S_IRUGO);
    ( S. |, [& D& ?
84. module_param(ccnt, int, S_IRUGO);

复制代码

1 u! Y: t$ k0 u) 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。
& |+ ^! Y" B/ N% n$ m     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
. p# r% l0 m8 Q( t8 V% t+ @! d