使用adb命令dump isp相关寄存器发生KE解决方法

[DESCRIPTION]
因为linux 3.10内核， proc文件系统的创建接口已经由proc_file_entry()变为proc_create()，同时proc文件系统的设备方法接口定义发生了一些变化。以/proc/driver/isp_reg为例，当使用adb shell cat/proc/driver/isp_reg就会发生KE。下面以/proc/driver/isp_reg为例介绍解决方法：
[SOLUTION]
1、修改/proc/driver/isp_reg的文件设备方法。
isp_reg的设备方法定义在alps/kernel-
3.10/drivers/misc/mediate/mach/<project>/CAMERA_isp.c文件中。代码如下，左边为修改前的定义，右边为修改后的定义。

2proc_camera_isp_open函数的定义如下：

1. static int proc_camera_isp_open(struct inode *inode, struct file *file)
   
2. {
   
3. return single_open(file, subsys_camera_isp_read, NULL);
   
4. };

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3、 Single_open()函数由内核提供；
4、 subsys_camera_isp_read()函数的定义：

1. static int subsys_camera_isp_read(struct seq_file *m, void *v)
   
2. {
   
3. int i;
   
4. seq_printf(m,"======top====\n");
   
5. for (i = 0x0; i<= 0x1AC; i += 4)
   
6. {
   
7. seq_printf(m,"+0x%08x 0x%08x\n", (unsigned int)(ISP_ADDR+ i),
   
8. (unsignedint)ISP_RD32(ISP_ADDR +i));
   
9. }
   
10. seq_printf(m,"======DMA====\n");
    
11. for (i = 0X200;i <= 0x3D8; i += 4)
    
12. {
    
13. seq_printf(m,"+0x%08x 0x%08x\n\r", (unsignedint)(ISP_ADDR +i),(unsigned
    
14. int)ISP_RD32(ISP_ADDR+ i));
    
15. }
    
16. seq_printf(m,"======tg ====\n");
    
17. for (i = 0x400;i <= 0x4EC; i += 4)
    
18. {
    
19. seq_printf(m,"+0x%08x 0x%08x\n", (unsigned int)(ISP_ADDR+ i),
    
20. (unsignedint)ISP_RD32(ISP_ADDR +i));
    
21. }
    
22. seq_printf(m,"======cdp(including EIS)====\n");
    
23. for (i = 0xB00;i <= 0xDE0; i += 4)
    
24. {
    
25. seq_printf(m,"+0x%08x 0x%08x\n", (unsigned int)(ISP_ADDR+ i),
    
26. (unsignedint)ISP_RD32(ISP_ADDR +i));
    
27. }
    
28. seq_printf(m,"======seninf ====\n");
    
29. for (i = 0x4000; i <= 0x40C0; i+= 4)
    
30. {
    
31. seq_printf(m,"+0x%08x 0x%08x\n", (unsigned int)(ISP_ADDR+ i),
    
32. (unsignedint)ISP_RD32(ISP_ADDR +i));
    
33. }
    
34. for (i = 0x4100; i <= 0x41BC; i+= 4)
    
35. {
    
36. seq_printf(m,"+0x%08x 0x%08x\n", (unsigned int)(ISP_ADDR+ i),
    
37. (unsignedint)ISP_RD32(ISP_ADDR +i));
    
38. }
    
39. for (i = 0x4200; i <= 0x4208; i+= 4)
    
40. {
    
41. seq_printf(m,"+0x%08x 0x%08x\n", (unsigned int)(ISP_ADDR+ i),
    
42. (unsignedint)ISP_RD32(ISP_ADDR +i));
    
43. }
    
44. for (i = 0x4300; i <= 0x4310; i+= 4)
    
45. {
    
46. seq_printf(m,"+0x%08x 0x%08x\n", (unsigned int)(ISP_ADDR+ i),
    
47. (unsignedint)ISP_RD32(ISP_ADDR +i));
    
48. }
    
49. for (i = 0x43A0; i <= 0x43B0; i += 4)
    
50. {
    
51. seq_printf(m,"+0x%08x 0x%08x\n", (unsigned int)(ISP_ADDR+ i),
    
52. (unsignedint)ISP_RD32(ISP_ADDR +i));
    
53. }
    
54. for (i = 0x4400; i <= 0x4424; i += 4)
    
55. {
    
56. seq_printf(m,"+0x%08x 0x%08x\n", (unsigned int)(ISP_ADDR+ i),
    
57. (unsignedint)ISP_RD32(ISP_ADDR +i));
    
58. }
    
59. for (i = 0x4500; i <= 0x4520; i += 4)
    
60. {
    
61. seq_printf(m,"+0x%08x 0x%08x\n", (unsigned int)(ISP_ADDR+ i),
    
62. (unsignedint)ISP_RD32(ISP_ADDR +i));
    
63. }
    
64. for (i = 0x4600; i <= 0x4608; i += 4)
    
65. {
    
66. seq_printf(m,"+0x%08x 0x%08x\n", (unsigned int)(ISP_ADDR+ i),
    
67. (unsignedint)ISP_RD32(ISP_ADDR +i));
    
68. }
    
69. for (i = 0x4A00; i <= 0x4A08; i += 4)
    
70. {
    
71. seq_printf(m,"+0x%08x 0x%08x\n", (unsigned int)(ISP_ADDR+ i),
    
72. (unsignedint)ISP_RD32(ISP_ADDR +i));
    
73. }
    
74. seq_printf(m, "====== 3DNR ====\n");
    
75. for (i = 0x4F00; i <= 0x4F38; i += 4)
    
76. {
    
77. seq_printf(m,"+0x%08x 0x%08x\n", (unsigned int)(ISP_ADDR+ i),
    
78. (unsignedint)ISP_RD32(ISP_ADDR +i));
    
79. }
    
80. return 0;
    
81. };

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5、 seq_read()函数由内核提供， ISP_RegDebug()保持不变。因为linux-3.10 procfs API changed， adb shell cat proc/diver/camio_reg同样需要修改，修改的方法和修改cat proc/diver/isp_reg类似；