OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   ) t0 D* _  C8 {5 Y+ j7 S
2. /*
   ' V* h) A$ O% s+ w6 [; r8 R
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   & d) J* ^/ w. A/ T0 N6 f" s4 _
7. *   This file contains EDMA3 Test code.
   8 @7 ?1 j8 U. r0 ~% ~$ U
8. *
   
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
    
11. *         TO CHANGE.
    
12. *
    3 ]  R4 }3 \( ], G# x3 b
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    ) d; |1 ]) G  K4 J  K
14. *
    ) F& G3 k; p! [, D
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
    . S/ {( J0 }5 f) U1 i0 r: p
17. * published by the Free Software Foundation version 2.
    
18. *
    " D1 r0 E6 V9 ~# p+ \$ R! j1 S
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    6 A" X# }9 k% t9 h
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    5 L/ d& ]- U+ p" [5 A, p3 T# Z( n2 ^
22. * GNU General Public License for more details.
    
23. */
    
24. 
    . N2 F3 V! M. \0 z8 S
25. #include <linux/module.h>
    $ t# n8 Y6 I. E( L0 k7 z* c6 {, @
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    + G. E# t& k! t: t
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    7 \, r' d0 k* W8 F% L: l
31. #include <linux/moduleparam.h>
    ( M# ^7 e; h* s0 n- Z
32. #include <linux/sysctl.h>
    # G& u8 K1 N7 `6 c4 ^! M. L
33. #include <linux/mm.h>
    1 z  T+ J2 _: `. Z
34. #include <linux/dma-mapping.h>
    
35. 
    ; C( ^3 Q/ M/ j0 ?8 j$ c" }
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    ; o7 H, z4 y5 }
39. #include <asm/hardware/edma.h>
    
40. 
    . Z1 a8 b* b% R/ J. f9 F" c
41. #undef EDMA3_DEBUG
    * X/ ?. P- T$ i* C, h/ w& E
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    ( P4 R5 Y5 o, f4 v1 |% P
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    4 W$ z1 N7 Q0 t! C0 E0 z' k
49. #define DMA_PRINTK( x... )
    3 J+ P  D" ?+ |6 @: }
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    $ L" P( }) O3 r; R% O1 Q/ H& J+ r
52. #endif
    ( p+ M! q5 _5 k0 J
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    , Q/ X/ b0 {) ~) b- P& K
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    7 X% |6 I3 o8 W, {) }, \# g9 D
62. static volatile int irqraised2 = 0;
    
63. 
    8 w$ n5 T( M  l. r7 e
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);
    9 [2 L2 @1 R* \. s) L) d1 E  r
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    / t. l! C1 b% }7 S! N, m4 H# A2 A
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    ( \" `7 X% k: N
74. char *dmabufsrc2 = NULL;
    9 S9 e. L* x. G# G
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    " J2 w5 ]3 N" C, T4 z- |
77. 
    - F: G' [: G* @
78. static int acnt = 512;
    1 T  n8 g( N3 [7 ]
79. static int bcnt = 8;
    8 E3 u1 s  c. u3 _: J. C% g" z- T
80. static int ccnt = 8;
    
81. 
    & `( y) \$ q2 Y& }: P: t, C
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    6 B! i" k- }  b" y7 W
84. module_param(ccnt, int, S_IRUGO);

复制代码

: a2 K- ]: X/ u/ R5 A9 Y      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。
$ ^$ R- v' t% m7 [# s, Y     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
% N' H7 X0 d  i6 x: X6 g( f, A
+ f; C! @$ ]3 f0 Y; a