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3.4.2 SD/MMC Driver

Figure 15: Working Principle of SD/MMC

The SD/MMC card drivers under a Linux system typically include four parts

- SD/MMC core, mmc_block, mmc_queue and SD/MMC driver;

 SD/MMC core implements the structure independent core code in

SD/MMC related operations;

 mmc_block implements the driver structure used when SD/MMC

cards work as block devices;

 mmc_queue implements management of the request queue;

 SD/MMC driver implements the controller drivers;

Reference

linux-2.6.32-sbc8140/drivers/mmc/

linux-2.6.32-sbc8140/drivers/mmc/host/omap_hsmmc.c

1 2 ... 47 48 49 50 51 52 53 54 55 56 57 ... 143 144

SBC8140 1
Copyright Statement: 2
Revision History: 2
Table of Contents 3
1 Product Overview 7
1.3 Product Features 8
1.3.2 Expansion Board 10
Page 12
1.5 System Block Diagram 13
1.6 Hardware Dimensions 14
1.6.2 Expansion Board 15
Page 16
*=Source code provided 16
2 Introduction to Hardware 17
2.1.4 Display Subsystem 18
2.2.2 H9DA4GH2GJAMCR Memory 20
2.2.4 FE1.1 USB Hub 20
2.2.6 MAX3232 Transceiver 21
Mini8510 22
Page 23
Page 24
Page 25
Page 26
Page 27
Page 28
Page 29
Page 30
2.3.3 CN3 JTAG Interface 31
2.3.4 CN4 Camera Interface 31
Page 32
2.3.5 LED Indicators 33
2.4.1 Power Jack 34
2.4.2 TFT_LCD Interface 34
Page 35
Page 36
2.4.3 Audio Output Interface 37
2.4.4 Audio Input Interface 37
2.4.5 Serial Interface 37
2.4.6 Ethernet Interface 38
2.4.7 USB OTG Interface 38
2.4.8 USB HOST Interface 39
2.4.9 SD Card Interface 39
2.4.10 LED Indicators 40
2.4.11 Buttons 40
3 Linux Operating System 41
3.2 Software Features 42
2. Copying More Tools; 43
3.3.2 System Compilation 44
1. Uncompress Source Code; 44
4. Compiling Kernel; 46
5. Making Filesystem; 46
3.3.3 Customizing the System 47
3.4 Introduction to Drivers 48
Page 49
Page 50
3.4.1 NAND Flash Driver 51
3.4.2 SD/MMC Driver 52
3.4.4 Video Capture Driver 54
3.5 Driver Development 57
3. Driver Design; 58
Page 59
Page 60
Page 61
3.5.2 GPIO_LEDs Driver 62
1. Device Definitions; 62
1） Driver Design; 64
Page 65
3.6 System Update 67
2. Updating Image Files; 68
Page 69
Page 70
Page 71
Page 72
Page 73
Page 74
Page 75
Page 77
2. Configuring for a 7” LCD; 79
3.8 Tests and Demonstrations 80
Page 84
Page 87
Notice: 90
Page 93
Page 95
4 WinCE Operating System 96
4.2 BSP Package Contents 97
Page 98
4.3.1 Installing the IDE 99
4.4 Introduction to Drivers 101
Page 102
Page 103
4.5 System Update 104
Page 105
Page 106
Page 107
1. Formatting an SD Card; 108
4.6 Other Operations 109
Page 110
Page 111
Page 112
1. Enable the GPIO device; 114
5. Operations on GPIO pins 115
7. Disable the GPIO device; 116
Linux System 117
Page 118
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Page 120
Page 121
Page 123
Page 124
Page 125
Page 126
Page 127
Page 128
Of Linux USB Ethernet/RNDIS 129
Page 131
Cylinders; 134
Page 135
Page 136
Appendix 5: FAQ 139
Appendix 1: ESD Precautions 140
& Handling Procedures 140
Appendix 2: Technical 141
2.4 Value Added Services 144

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