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标题: OMAPL138如何在Linux下使用EDMA3驱动 [打印本页]
作者: yyj    时间: 2018-1-30 11:01
标题: OMAPL138如何在Linux下使用EDMA3驱动
本帖最后由 yyj 于 2018-1-30 11:01 编辑
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  1. [code]EDMA sample test application
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  2. /*
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  3. * edma_test.c" b- x) n. O% ?. N$ R5 v1 U
  4. *+ ^% G2 s5 p* y* C5 f
  5. * brief  EDMA3 Test Application  W- l+ E2 q8 Z# W5 H
  6. *
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  7. *   This file contains EDMA3 Test code.
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  8. */ u: J) |' G1 g9 ~/ Q" ?
  9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE4 |) R9 [7 [( Z$ j! S( ^
  10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT: a" S) }' e7 p6 P% S
  11. *         TO CHANGE.8 h# L3 H4 T  J, J2 v
  12. *
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  13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
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  14. *
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  15. * This program is free software; you can redistribute it and/or
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  16. * modify it under the terms of the GNU General Public License as
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  17. * published by the Free Software Foundation version 2.
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  18. *! I, B: s* y9 }6 {8 V
  19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any- W# L( r; O, l& S( r. I' u8 n
  20. * kind, whether express or implied; without even the implied warranty
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  21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the6 G. H* S% _1 k* }1 u& S
  22. * GNU General Public License for more details.
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  23. */, Z- V7 X' d7 u! t) l
  24. ) I+ Z, D5 {+ R% r
  25. #include <linux/module.h>
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  26. #include <linux/init.h>
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  27. #include <linux/errno.h>
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  28. #include <linux/types.h>
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  29. #include <linux/interrupt.h>
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  30. #include <asm/io.h>
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  31. #include <linux/moduleparam.h>
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  32. #include <linux/sysctl.h>- x& T4 J7 p( Q6 q$ Q
  33. #include <linux/mm.h>! h" \' E0 n# s/ u
  34. #include <linux/dma-mapping.h>( S8 N  z$ m4 T' Y) c+ |* u

  35. $ {2 R# Y/ `* p$ x$ f# M& H
  36. #include <mach/memory.h>& v. {* w3 M5 |0 i2 D
  37. #include <mach/hardware.h>
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  38. #include <mach/irqs.h>
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  39. #include <asm/hardware/edma.h>8 `) q% [, c( V7 h: G1 I; u

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  41. #undef EDMA3_DEBUG
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  42. /*#define EDMA3_DEBUG*/" m; F% k# X! U
  43. . ]/ B; K% ~( h1 H- ^, f# g& ~. [% z
  44. #ifdef EDMA3_DEBUG$ u% r7 a2 _- Q  [* o! K
  45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)# k/ ?$ u2 t: q6 a- D
  46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)5 O0 U4 d& z: G! G
  47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)$ f1 |3 e( p4 G, y7 n' I
  48. #else
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  49. #define DMA_PRINTK( x... )( c) a5 o) ?4 S9 s- ^
  50. #define DMA_FN_IN" }9 U) l/ p/ V  w, J
  51. #define DMA_FN_OUT
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  52. #endif
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  53.   C4 e9 X( T5 w) t, D1 K8 T, \
  54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)! [9 Z% f4 L$ R% s, k
  55. #define STATIC_SHIFT                3# U! ^& [3 U1 r9 r
  56. #define TCINTEN_SHIFT               209 @" W1 S+ a6 m: g
  57. #define ITCINTEN_SHIFT              210 l) Q" W: X: Q, v; e- r
  58. #define TCCHEN_SHIFT                227 W1 K4 A, H! w. Q; ?0 ]
  59. #define ITCCHEN_SHIFT               23
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  60. , t2 L( g# O  a; J1 y
  61. static volatile int irqraised1 = 0;8 @5 W, \/ l" u* r8 [  Q9 k/ J
  62. static volatile int irqraised2 = 0;$ P; o* w' A9 `0 j( ?' P) ?
  63. / x3 O: e! F! L1 G- t7 a
  64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
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  65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
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  66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
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  67. / E: ?- p4 [6 b3 T9 x
  68. dma_addr_t dmaphyssrc1 = 0;: G# P) g+ M  i" h: A% g+ Q  ?1 O
  69. dma_addr_t dmaphyssrc2 = 0;0 z& A' ]* i, [( u
  70. dma_addr_t dmaphysdest1 = 0;
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  71. dma_addr_t dmaphysdest2 = 0;+ T" ~3 l3 c3 U# p& E
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  73. char *dmabufsrc1 = NULL;
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  74. char *dmabufsrc2 = NULL;
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  75. char *dmabufdest1 = NULL;
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  76. char *dmabufdest2 = NULL;2 `1 v- \. @6 K0 A( q
  77. 0 x; P/ |5 {1 L$ R+ R
  78. static int acnt = 512;5 O' v* T% ]8 t- r4 F/ V8 A& E8 t
  79. static int bcnt = 8;7 S$ M+ |# Y  F3 Z* [
  80. static int ccnt = 8;% x% \& \2 B3 K: E) J- E
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  82. module_param(acnt, int, S_IRUGO);
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  83. module_param(bcnt, int, S_IRUGO);/ {5 k$ x$ o+ r) u0 y9 Z
  84. module_param(ccnt, int, S_IRUGO);
复制代码
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" N6 n2 K' o) U  l/ G% h! W; w: S      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
1 J) h$ N8 T6 i9 J) ?/ V& V. Karm-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。
: F; J. D4 b( f     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。7 V, ]. v) x+ H3 Z- R* B
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