OMAPL138如何在Linux下使用EDMA3驱动

yyj

8 m0 n. r) i9 s' J1 w- r

1. [code]EDMA sample test application
   7 {7 o- v& o1 g3 D. x: G7 d
2. /*
   ' o9 B1 f) F: ^4 {/ q
3. * edma_test.c
   , x8 T8 O+ T* ~/ A1 q
4. *
   ; K' f, U$ s! {5 j
5. * brief  EDMA3 Test Application
   * R" l( E- E6 N% g* w
6. *
   7 E3 Y% Z& ]7 [+ `+ t7 Z8 @- s
7. *   This file contains EDMA3 Test code.
   
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   7 M5 ?; [/ N. }, n0 \* U! ?' V
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/
    9 ~* |$ ]7 m2 g6 G7 z
14. *
    $ [" }* d$ v' m0 N( u
15. * This program is free software; you can redistribute it and/or
    ( o. a$ Z- Q# v6 j
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
    
20. * kind, whether express or implied; without even the implied warranty
    ! T) H! F% _1 I- o, B; f
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      U  \2 p! E% ^
22. * GNU General Public License for more details.
      O/ G! W/ ?' T' K
23. */
    8 E, Z/ r6 q  k8 P1 l$ J& H
24. 
    " R$ K/ J) y5 ?8 S5 t$ V
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    2 A' J* ~7 Y5 r. `0 O+ z1 y
27. #include <linux/errno.h>
    0 S+ R8 \% }" ?7 Z
28. #include <linux/types.h>
    3 X* |: Q9 ?+ r- u# B
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    ; _7 C. y: p: _. k2 H& ~
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    * P& m8 ^2 Y1 ~" r
39. #include <asm/hardware/edma.h>
    ! p9 N: t# O8 \# t, r
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
      }' t6 W8 h2 [4 l+ s( ?
44. #ifdef EDMA3_DEBUG
    & H5 }: }+ R: p2 z" N
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    5 a8 a$ e! D6 X4 g" x- b. ^( I. h) A
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    * O" ]! [+ u7 g) w8 A  Q+ q( t' i
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    + ?3 c6 U( A5 J( w/ z" y
48. #else
    6 G+ C6 V% H4 h* j, }1 a0 L
49. #define DMA_PRINTK( x... )
    & m3 q4 m, J; ^! c. }0 I" |  L5 n6 M
50. #define DMA_FN_IN
    % s- \$ A2 H  W( v8 A/ y
51. #define DMA_FN_OUT
    ! R( O0 Y' ?9 c% n" d* C9 Z! \0 m
52. #endif
    3 p  W: M3 |: ?2 x4 e
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    * \  h, h* H7 q- @5 _' v
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    $ O5 R2 Y! D; \5 x
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    3 R. W1 f/ ]7 X& r. B
60. 
      N, l+ p- Y( x: r
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    / ^+ O0 ^' j, H+ Y# O  e
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    $ ]: V2 ^- [$ D0 T
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);
    0 |0 l7 u2 x" Q: d3 j* I
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    6 S1 y& s1 p  k: T+ l0 S
69. dma_addr_t dmaphyssrc2 = 0;
    5 H; U6 P, K2 O& A
70. dma_addr_t dmaphysdest1 = 0;
    / g: i- s& A0 X
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    & F0 p: ]4 J2 S; @0 V
77. 
    
78. static int acnt = 512;
    ' F' G6 N% I( V$ j! T2 c7 c' w
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    $ t7 `$ ~5 w, g& R/ U: M# H
83. module_param(bcnt, int, S_IRUGO);
    + Q  A, \7 z; t
84. module_param(ccnt, int, S_IRUGO);

复制代码

* c) [- `+ s+ c; H7 G
      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。
4 Z# U; f* U/ [3 g, a$ W     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
# J# B$ t- U! E' e3 ?