OMAPL138如何在Linux下使用EDMA3驱动

yyj

$ L' }6 b0 T: F8 H* l

1. [code]EDMA sample test application
   
2. /*
   ) X' N7 x2 \# ?( k
3. * edma_test.c
   
4. *
   ; ~' ?; F' J7 Q. J/ w4 _" M7 @
5. * brief  EDMA3 Test Application
   
6. *
   * V. g  B. o7 u+ s: C/ `# C9 j1 G
7. *   This file contains EDMA3 Test code.
   % l2 k% b, j* Y# g. p  J% q
8. *
   : i9 s0 L- E/ W7 U- `/ S+ E% h
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   ; k0 ~# D: g! ]& V- q
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
      I( O! S2 B( V; {$ x% W9 M4 s0 O- P
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
      }" H6 z; k1 U! [7 Y7 }" t
14. *
    
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
    
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    * P! }( P9 U3 Q. v! F" I
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    
24. 
    & L& @, M- X; e$ k6 Y" j* L2 h: N
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    4 r$ U1 h: M5 [+ }
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    - ]8 _- m2 g1 A
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    # \7 H8 ~1 C% R6 R: s
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
      y) _' Z' A% L- W& `
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    3 ]# ~7 B! {* p! W3 P/ I
40. 
    $ F* H) q; L! r+ L2 o/ D1 g
41. #undef EDMA3_DEBUG
    ! x9 |& N! [: Z. z4 |
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    * S& B- B# N9 r+ E* f: ]) `
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    2 q5 ]+ f) [5 `$ U! V
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    . @% J9 V! {5 O: A* Y; m! \
48. #else
    5 {; N" N$ r  b" a1 k3 R. P
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    $ I2 Z, d: F+ w
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    2 [( {; L* G1 m- l1 {
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    1 }7 S& Q' A' e. Q. T$ g
62. static volatile int irqraised2 = 0;
    
63. 
    / v+ m) `% d5 J& t. Y' I, `- Y3 C& ?
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);
    % ]+ @1 a& j7 N/ Z5 J- W7 B
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    5 W2 L5 ?; L) s% X
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    % j3 ^. _1 ~/ B7 N- |
69. dma_addr_t dmaphyssrc2 = 0;
    - |  H, v  J6 _1 N5 ^& W) t
70. dma_addr_t dmaphysdest1 = 0;
    1 {1 Y7 D/ L- g# ?! U
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    + [1 J5 C, e9 U: c
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    - l4 u6 |* Y" w! }8 _) `
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
      O  R' p1 k; y* s7 e% B
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    6 ~# h3 w6 |0 p5 V1 i5 Q! z
83. module_param(bcnt, int, S_IRUGO);
    $ a4 G, V# y/ C: ?$ m" i9 Z  D
84. module_param(ccnt, int, S_IRUGO);

复制代码

5 z( g0 Z3 {& U7 W2 C( m
      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
; d* |4 f& |; D" H$ s0 F& I! darm-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。
- I7 _' z8 R% x: n     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
9 S# T5 l- {8 t% `% `9 q- b
( H. p6 V0 N7 G- Z5 o! ], U