OMAPL138如何在Linux下使用EDMA3驱动

yyj

: S6 W; Z1 C2 e# N+ Y% o3 a4 x

1. [code]EDMA sample test application
   ( Z' H  ]0 r8 J; y0 {" i9 u
2. /*
   
3. * edma_test.c
   2 Y# H3 T  N& N/ L4 S
4. *
   7 ]* i( p) }$ }
5. * brief  EDMA3 Test Application
   ! u) `+ i8 U" x' X1 ?; ?
6. *
   
7. *   This file contains EDMA3 Test code.
   9 R9 Y7 c- }# d2 @5 Q
8. *
   & e  u1 u- G7 m# {! E& l- I" L9 G/ b
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 S9 k& B+ X% Y1 \1 S' ~, k7 w2 G
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    4 k1 L% J4 x1 I8 h. o, w; J
14. *
    5 \0 c" P- M$ L$ s  _/ ]
15. * This program is free software; you can redistribute it and/or
    8 J% V  C% `$ e7 Y
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
    , V2 g! _' m$ z7 [/ |, h* }
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    + D8 a  a2 i& d/ y/ s' L( h# Z. r
22. * GNU General Public License for more details.
    * x# M+ @& n5 @
23. */
    ) D; f/ U( l# }9 r0 G' d/ s7 x
24. 
    ) y# J4 O$ w4 W, ?( @+ J
25. #include <linux/module.h>
    8 h( c' y' V, l1 b# k! l; j/ b+ Y5 V
26. #include <linux/init.h>
    + i) b; z" g. P* \: [1 m
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    # i  }% r2 T  }% R8 `. K6 g/ w% A2 T" j
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    4 L. F1 O! G2 K" w/ T+ M6 w
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    2 G3 o1 X) J7 ?4 J0 T
39. #include <asm/hardware/edma.h>
    
40. 
    . E7 `- P: h4 Q! k4 ?
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    / C* G# w, J) @) \6 e7 }9 p' O- K- q
43. 
    % x" J  }5 [6 O7 m8 ?7 h9 ~; f
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    5 R, h0 I. t- f  D! V+ f3 F6 u
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
    ) i& R3 ]  g: s- C6 v1 E
49. #define DMA_PRINTK( x... )
    & S1 a3 Z2 r8 v2 B. Z6 V& y5 y0 j, ?
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    ) ~  O; E, L! ^1 n8 s/ R% C2 n
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    # ^" E5 G7 N) F$ f5 p4 R* t8 }
55. #define STATIC_SHIFT                3
    ; v) j5 o  }! i' v
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    / w, F! D- G# o" t/ \+ M( H+ F
59. #define ITCCHEN_SHIFT               23
    $ V+ m3 }  g# g
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);
    
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    " S& ]$ T3 V% @! T( Q7 h8 u1 e
67. 
    + I( k2 I; v" Q1 L$ R3 o
68. dma_addr_t dmaphyssrc1 = 0;
    - y( m( J8 ]% j8 n) d# f
69. dma_addr_t dmaphyssrc2 = 0;
    ; S  G6 P, l" K8 m* _# {& x
70. dma_addr_t dmaphysdest1 = 0;
    4 V& \+ L1 h7 o) A
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    2 o. B) P. m6 m4 ~! @0 _, @
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    " P+ y( N( b6 q5 V0 ]9 _
76. char *dmabufdest2 = NULL;
    
77. 
    / J& x) _8 y* G, m9 |- U
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    * r4 _7 P! s/ I2 c
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

4 v* Z4 W, Y" s& l      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
8 s' @4 X$ M9 zarm-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。
* D! u' u0 W' R' ^2 ]7 O4 t' L" j6 X     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
8 }& H' `) B  T  h: p3 w5 D  k
. |# C$ m/ J5 n7 B% a3 s6 o; w
) `( w/ `0 H$ \0 N1 S7 K9 x