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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. /*+ n, }6 W' O. B6 x- p
  3. * edma_test.c% R$ L  k3 Y" N. W$ {. i
  4. *7 F! d6 h. _% C  l# g
  5. * brief  EDMA3 Test Application4 j$ c& z* O: k/ p
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  7. *   This file contains EDMA3 Test code.6 e2 v( [, d1 [( @9 @
  8. *% B5 F! e  O5 `% E$ c
  9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE. s. {9 K, M; \# y+ o
  10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT: h' v9 h6 _+ H
  11. *         TO CHANGE.7 O% l2 d% J; ]9 B0 m
  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& Z! M! Q3 ^3 C
  17. * published by the Free Software Foundation version 2./ M* m  i- b: f* m/ A- ~
  18. *
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  19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
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  20. * kind, whether express or implied; without even the implied warranty0 F' P( ]9 M) K. U( A( h
  21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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  22. * GNU General Public License for more details.
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  23. */) k: |/ q2 Y$ L2 t5 Z
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  25. #include <linux/module.h>
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  26. #include <linux/init.h>9 L" I2 a6 f* `( g$ ?
  27. #include <linux/errno.h>& [$ F: t1 N/ E+ Z  M9 L% r
  28. #include <linux/types.h>) N( n( M+ h' S' `
  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>
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  33. #include <linux/mm.h>$ H+ ~% \9 v5 _+ i' {1 B
  34. #include <linux/dma-mapping.h>. A; n6 p6 ]- w8 l# |

  35. ( P1 m: I) v) \, s
  36. #include <mach/memory.h>
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  37. #include <mach/hardware.h>
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  38. #include <mach/irqs.h>* P0 ^: ?) I/ C8 z0 e
  39. #include <asm/hardware/edma.h>1 q! g0 W# ?0 r& E6 x
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  41. #undef EDMA3_DEBUG
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  42. /*#define EDMA3_DEBUG*/. f" p5 W6 V$ d* ~; q
  43. ' B0 s1 t4 \7 f7 t
  44. #ifdef EDMA3_DEBUG" s7 W$ [* M4 e1 k
  45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
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  46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__): }7 i' _' m# X1 I! a" G
  47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)$ f  I; K: G. d% e
  48. #else6 ], k7 k0 F3 G. V0 K: R
  49. #define DMA_PRINTK( x... )1 r+ U3 [% A0 ?5 t3 F% p8 ~  \; C
  50. #define DMA_FN_IN
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  51. #define DMA_FN_OUT
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  52. #endif) z3 q3 b; m4 Q6 ?

  53. + _/ J. T) r5 I2 c6 `' i
  54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
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  55. #define STATIC_SHIFT                3# X8 C8 O  s: p' K9 A' D
  56. #define TCINTEN_SHIFT               20
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  57. #define ITCINTEN_SHIFT              21/ i' x4 Q+ f' ]' B0 w; `9 y
  58. #define TCCHEN_SHIFT                22
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  59. #define ITCCHEN_SHIFT               23
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  60. 5 U- U. u. s$ O6 y5 o. Q
  61. static volatile int irqraised1 = 0;
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  62. static volatile int irqraised2 = 0;
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  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. / K2 H: U; t/ D& G) O0 V" o
  68. dma_addr_t dmaphyssrc1 = 0;
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  69. dma_addr_t dmaphyssrc2 = 0;
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  70. dma_addr_t dmaphysdest1 = 0;
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  71. dma_addr_t dmaphysdest2 = 0;3 h' k7 K' {; ^2 n# z

  72. " Z" S6 q9 s0 y% o- ?( }. D! x$ |
  73. char *dmabufsrc1 = NULL;) ]; n, U4 r: w- J# k
  74. char *dmabufsrc2 = NULL;) M7 X# P% j2 A+ K: j( c1 x3 o
  75. char *dmabufdest1 = NULL;
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  76. char *dmabufdest2 = NULL;
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  77. 7 N8 c7 ~' W1 K" D9 N$ W3 O
  78. static int acnt = 512;
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  79. static int bcnt = 8;
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  80. static int ccnt = 8;
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  81. 6 P5 w# f9 H, J. P8 _3 r! [
  82. module_param(acnt, int, S_IRUGO);
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  83. module_param(bcnt, int, S_IRUGO);
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  84. module_param(ccnt, int, S_IRUGO);
复制代码

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      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  v9 Z1 q2 @( _; l$ h
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。# t$ y+ j4 m% g& x+ {4 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。
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