OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   ! G/ G5 s1 O0 w2 I3 \
2. /*
   
3. * edma_test.c
   
4. *
   . {; P: n: v' [6 W" x! t0 G" E/ K! o
5. * brief  EDMA3 Test Application
   
6. *
   $ z& x: f2 h  {/ M& N
7. *   This file contains EDMA3 Test code.
   * {" O5 b  z+ ]0 n5 U# J
8. *
   ; C% W( @2 D5 @, ^+ d! C! {  o1 C9 X* i
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   - L; d# d+ M0 ~* H4 P2 P! c/ e+ q
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    / y! U5 X: a0 [  [" u8 ~( S
11. *         TO CHANGE.
    
12. *
    4 h, ~0 i. A  R& k' L
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    & n+ t# E/ \: r, D# l, w9 X+ u
14. *
    3 B3 o. `6 o& ?; S
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. *
    # s/ a$ L. R, D6 C/ I0 d) R
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    ( b7 R* y7 T2 Z' {- F# D9 g) F2 H, N
20. * kind, whether express or implied; without even the implied warranty
    , e8 D+ J% z& p  j- g0 V" K: \/ G) z+ L
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    2 q2 l5 J9 Z0 g/ L7 O8 ]
22. * GNU General Public License for more details.
    8 @5 k6 X: r9 f& M) Y- _* e$ J
23. */
    6 h( B7 a2 c& G8 V" `2 s
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    . ?' m' y+ c& Q& ]% r6 z; b1 `, e
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    / h" t6 v7 K& P! N
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>
    
35. 
    
36. #include <mach/memory.h>
    0 C& ~0 w0 u7 z6 X$ T
37. #include <mach/hardware.h>
    ( P2 n9 Z; O: D* D) A$ `
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    " C# n( T; }' `4 x1 R
40. 
    ( t  Q3 U2 `& ]' r, D2 ^" \
41. #undef EDMA3_DEBUG
    7 o0 B" ]( M( B" ~% f
42. /*#define EDMA3_DEBUG*/
    . ?. L" j  @( l4 u7 D
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    % {3 r! {3 T6 s1 A& j
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    # g8 w7 P$ u6 q5 m5 r9 k
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    : s7 q" b2 U5 s) R2 ^
52. #endif
    ( j9 \1 y. V4 v" s0 x: u
53. 
    ( J7 o/ w5 S7 h7 A# P
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    , O$ L9 t* \) M& E: ?; [: T
58. #define TCCHEN_SHIFT                22
    9 U0 e' L! X4 {, f- ~( l
59. #define ITCCHEN_SHIFT               23
    
60. 
    " Q* R/ |; ~& s' b3 k5 X; X, M
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    , z. A* ?* _( i* ?& p
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);
    9 B9 l9 M0 T+ @  g4 c' G$ M$ m
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    , P4 {) m- r4 z& R3 j( m
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    ( `5 f' u! a0 ~
71. dma_addr_t dmaphysdest2 = 0;
    * c0 {' m9 R2 k* B2 k7 i- Z7 T
72. 
    
73. char *dmabufsrc1 = NULL;
    9 E1 w2 {( ?2 n( h" u. _0 @# c9 \) x
74. char *dmabufsrc2 = NULL;
    ) C/ x+ _9 }- O3 m% B; B
75. char *dmabufdest1 = NULL;
    # o  `3 W: t  A& D  J# j- I
76. char *dmabufdest2 = NULL;
    
77. 
    , S0 j: ^- n4 X6 W8 f3 c
78. static int acnt = 512;
    
79. static int bcnt = 8;
    ; y9 E$ H" w( J; B8 n9 Y8 X1 W
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    1 A: l1 _0 Z9 S; l# k  o& X; g
84. module_param(ccnt, int, S_IRUGO);

复制代码

" J+ Q- E7 I. p. H' J$ v
7 G- u% p" j. a" V; L* J5 w      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。
- V/ w+ f: y; O4 d( b" u3 M9 N* S5 |     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
6 X$ H* s7 A3 h1 b: s; X0 W+ C
2 h- _9 F# P/ p& ?* ?