引言
之前，曾经在orpsoc的平台上，测试验证过其sd card controller的linux的驱动，但是并不是很完美，经过努力，终于在eCos下完成了其全部功能的验证，包括驱动层验证，文件系统的挂载，应用层的创建文件，打开文件，复制文件，源文件与复制文件的比较等，此外，还有创建目录，切换目录等操作。
本小节就分享一下整个验证过程。
关于基于orpsoc+linux下的sd card controller验证，请参考：
http://blog.csdn.net/rill_zhen/article/details/9111213
1，硬件部分
1>基本信息
本次验证，采用的是最初的orpsoc的硬件结构，没有进行任何改动，唯一做的工作就是将硬件配置信息提前烧到了外部的spi-flash，每次上电可自动执行，省去每次调试前的FPGA配置工作。
关于如何烧写外部spi-flash,请参考：http://blog.csdn.net/rill_zhen/article/details/9162275
此外，需要了解sd卡控制器这个ipcore的一些信息，比如wishbone地址等，也在之前的blog中做过介绍，这里不再赘述。
2>sd card controller的仿真
关于ipcore的仿真，之前也做过很多实验，如果有什么问题，可以先参考之前的内容，或者写评论给我，我会尽快回答。这里只给出仿真波形和仿真输出信息。如下：
1》仿真波形
2》仿真信息
可以看出，有一个错误。但我觉得不影响使用。
# T0 Start # # access_to_reg TEST # Time: 925 # TEST 0: 3 32-BIT READ-WRITE REGISTERS ( VARIOUS BUS DELAYS ) # # =========================================================================== # T0 test_access_to_reg Completed # =========================================================================== # T1 Start # # test_send_cmd TEST # Time: 4435 # TEST 0: 0: Send CMD, No Response # # =========================================================================== # T1 test_send_cmd Completed # =========================================================================== # T2 Start # # access_to_reg TEST # Time: 8153 # TEST 3.0: 0: Init Seq, No Response # V 1.0 Card, Timeout In TEST 3.0 00008004 # CID reg 1: ffffffdd # RCA Response: 20000700 # RCA Nr for data transfer: 00002000 # # =========================================================================== # T2 test_init_sequence Completed # =========================================================================== # T3 Start # # access_to_reg TEST # Time: 61583 # TEST 4.0: Send data # V 1.0 Card, Timeout In TEST 4.0 00008004 # CID reg 1: ffffffdd # RCA Response: 20000700 # RCA Nr for data transfer: 00002000 # 2**BUS WIDTH 4 # Card status after Bus width set 00000920 # # =========================================================================== # T3 test_send_data Completed # =========================================================================== # T4 Start # Time: 208639 # TEST 4.0: Send data # V 1.0 Card, Timeout In TEST 4.0 00008004 # CID reg 1: ffffffdd # RCA Response: 20000700 # RCA Nr for data transfer: 00002000 # 2**BUS WIDTH 4 # Card status after Bus width set 00000920 # # =========================================================================== # T4 test_send_rec_data Completed # =========================================================================== # T5 Start # # test_send_cmd_error_rsp # Time: 416327 # TEST 5 part 0: Send CMD, No Response # Time: 419969 # TEST 5, part 1: Send CMD, 48-Bit Response, No error check # Time: 426521 # TEST 5, part 2: Send CMD3, 48-Bit Response, All Error check enable # Time: 433177 # Bus error succesfully catched, Error status register: 0000000a # Time: 433177 # Test 5 part 4: Send CMD2, 136-Bit # # =========================================================================== # T5 test_send_cmd_error_rsp Complete # =========================================================================== # # access_to_reg TEST # Time: 444277 # TEST 4.0: Send data # V 1.0 Card, Timeout In TEST 4.0 00008004 # CID reg 1: ffffffdd # RCA Response: 20000700 # RCA Nr for data transfer: 00002000 # 2**BUS WIDTH 4 # Card status after Bus width set 00000920 # T6 test_send_cmd_error_rsp Complete # All Test finnished. Nr Failed: 0, Nr Succes: 7
2，软件部分
1>与上次的比较
本次验证和上次验证的最大不同是软件。
首先，OS变了，上次采用的是linux，SD controller的驱动也是参考ipcore附带的testbench，ipcore附带的裸机程序，经过自己整理，变换，最后完成的linux下的驱动。
其次，测试程序也变了，上次只在linux驱动层进行了测试，这次不仅进行了driver的测试，还进行了应用层的测试。
最后，验证形式也变了，上次只是进行了基本的I/O验证，这次验证包括了文件系统，是文件级的测试。
2>验证准备
首先要搭建eCos运行环境，请参考：http://blog.csdn.net/rill_zhen/article/details/9271721
其次是搭建ORPSoC的调试环境，请参考：http://blog.csdn.net/rill_zhen/article/details/8700937
3>软件编码
1》编写基于eCos的sd卡控制器的driver
此驱动已经在eCos工程内，路径是：eCos/packages/devs/disk/opencores/sdcmsc/current/src/if_sdcmsc.c
为了更清楚，更真实的展示验证过程，在里面增加调试信息，修改后，代码请参考附录。
2》修改eCos中关于fatfs部分的代码
eCos本身的fatfs部分有一些问题，如果不修改的话，在测试程序将无法挂载sd卡的文件系统。
在这之前，有必要梳理一下mount（）函数的执行过程，如下：
a，应用程序的mount（）
如下便是测试程序的部分代码：
这里需要说明的是，mount的第一个参数，必须和驱动中注册的设备名称一致。
b，eCos中mount（）函数的实现入口，misc.cxx：mount()
之前说过，eCos只是一个库，并不是一个platform，所以应用程序和eCos在逻辑上是平等的，既然应用程序mount()返回错误，那么我们需要查找其具体实现。
如下图：
c，mount（）对应的具体文件系统的mount实现入口,fatfs.c：fatfs_mount()
这里需要说明的有两点：
第一，fatfs_mount()会首先调用cyg_io_lookup()函数，而这个函数最终会调用驱动（if_sdcmsc.c）中的sdcmsc_disk_loopup（）函数，sdcmsc_disk_loopup（）函数会调用sdcmsc_disk_init()，实现SD卡的初始化工作，也就是上次基于linux的验证时，给SD卡发送一连串的命令。
第二，fatfs_mount()会调用cyg_io_lookup()函数之后，会调用fatfs_init()函数，fatfs_init()函数会首先调用read_boot_record()函数，这个函数会读取FATFS的格式化信息。
如下图：
d，读取boot record信息,fatfs_supp.c：fatfs_init()
eCos就是在这里出现了问题！eCos默认是从SD卡的第0个sector读取boot record，但是并不是所有的SD卡的文件系统格式化信息都存在那里，所以，如果你的SD卡的文件系统信息没有存在第0个sector，eCos就无法挂载。很不幸，我用的SD卡的fat fs的boot record 信息就不在第0个sector，所以一直无法挂载，出现“invalid argument”的错误。
如果想让eCos能读到boot record信息，需要修改读取地址。如何知道你的SD卡的boot record信息的起始地址在哪里呢？可以下载安装winhex这个软件来查看，安装完成后，将SD卡通过读卡器插到电脑上，打开winhex的tool->open disk，选择你的SD卡，就可以看到文件系统的格式化信息。
我的SD卡的boot record信息在第135个sector，起始地址是0x10e00，eCos里面的地址是0，所以肯定读不到正确的值，无法挂载也就可以理解了。
winhex我已上传：http://download.csdn.net/detail/rill_zhen/5776013
关于fat fs的格式化信息，请参考：http://averstak.tripod.com/fatdox/bootsec.htm#ef
fatfs_init()，如下图：
read_boot_record(),如下图：这里需要修改！
boot record的结构体，如下图：
e，code list
请参考附录部分的内容。
3，验证
验证过程是简单的。
1>配置eCos
要进行本次验证，需要增加5个package。执行如下操作：
如下所示：
1》增加依赖包：
ecosconfig new orpsoc default
ecosconfig add CYGPKG_IO_DISK
ecosconfig add CYGPKG_IO_FILEIO
ecosconfig add CYGPKG_FS_FAT
ecosconfig add CYGPKG_BLOCK_LIB
ecosconfig add CYGPKG_LINUX_COMPAT
2》检查冲突，要没有冲突才行
ecosconfig check
3》编译
ecosconfig tree
make
4》编译测试
make tests
2>编译测试文件
到测试文件所在目录，执行make即可。
如果有问题，请参考：http://blog.csdn.net/rill_zhen/article/details/9271721
3>下载验证
将生成的测试文件，通过or32-elf-gdb烧到板子上。
当然，如果你的板子的硬件配置没有事先烧到spi-flash里面，需要用jtag将orpsoc_top.svf 烧到板子上。
这一步的具体操作过程，之前也有介绍，这里不再赘述。
4，验证结果
如果一切顺利，你会看到如下打印信息。
从中可以看出，我的SD卡是FAT16格式的，卡的capacity是1.9G左右，mount成功，可以read，write文件。
打印信息如下：
openrisc@openrisc-VirtualBox:~/share/ecos_sdc_test$ picocom --b 115200 --p n --d 8 --f xon /dev/ttyUSB2 picocom v1.4 port is : /dev/ttyUSB2 flowcontrol : xon/xoff baudrate is : 115200 parity is : none databits are : 8 escape is : C-a noinit is : no noreset is : no nolock is : no send_cmd is : ascii_xfr -s -v -l10 receive_cmd is : rz -vv Terminal ready is_v20:0x1 is_sdhc:0x0 rca:0xe6240000 card capacity:0x3af000 sdc init success! data:0x2dbe8 fatfs boot record:---> sig:0x29 marker0:0x55 marker1:0xaa jump:0x3ceb oem_name[0]:M oem_name[1]:S oem_name[2]:D oem_name[3]:O oem_name[4]:S oem_name[5]:5 oem_name[6]:. oem_name[7]:0 bytes_per_sec:0x200 sec_per_clu:0x40 res_sec_num:0x8 fat_tbls_num:0x2 max_root_dents:0x200 sec_num_32:0x0 media_desc:0xf8 sec_per_fat:0xec sec_per_track:0x3f heads_num:0xff hsec_num:0x87 sec_num:0x3ae039 sec_num_32:0x0 sec_num_32:0x0 marker0:0x55 marker1:0xaa sec_per_fat_32:0x290f4 ext_flags:0x2 fs_ver:0x836c root_cluster:0x0 fs_info_sec:0x2 bk_boot_sec:0xdc5c drv_num:0x80 ext_sig:0x29 ser_num:0x6eef0577 vol_name[0]:N vol_name[1]:O vol_name[2]: vol_name[3]:N vol_name[4]:A vol_name[5]:M vol_name[6]:E vol_name[7]: vol_name[8]: vol_name[9]: vol_name[10]: fat_name[0]:F fat_name[1]:A fat_name[2]:T fat_name[3]:1 fat_name[4]:6 fat_name[5]: fat_name[6]: fat_name[7]: mount ok! chdir ok! <INFO>: reading directory / <INFO>: entry RILL [mode 00000008 ino 00000009 nlink 1 size 10] <INFO>: entry FOO [mode 00000008 ino 00000003 nlink 1 size 10] <INFO>: entry FEE [mode 00000008 ino 00000004 nlink 1 size 10] <INFO>: entry FP_FILE [mode 00000008 ino 00000008 nlink 1 size 10] <INFO>: create file /mkg_rill size 10 <INFO>: check file mkg_rill <INFO>: copy file mkg_rill -> mkg_rill_bak <INFO>: check file mkg_rill_bak <INFO>: compare files mkg_rill_bak == /mkg_rill buf1[0](00) == buf2[0](00) buf1[1](01) == buf2[1](01) buf1[2](02) == buf2[2](02) buf1[3](03) == buf2[3](03) buf1[4](04) == buf2[4](04) buf1[5](05) == buf2[5](05) buf1[6](06) == buf2[6](06) buf1[7](07) == buf2[7](07) buf1[8](08) == buf2[8](08) buf1[9](09) == buf2[9](09) PASS:<fatfs1> EXIT:<done>
5，小结
经过努力，基于ORPSoC的SD卡控制器的验证工作终于可以告一段落了。通过目前的工作，有如下收获：
首先，证明了opencores上面的这个sd卡控制器的硬件是没有问题的。
其次，ORPSoC对这个ipcore的集成，也是没问题的。
第三，得到了一个可以work的SD卡控制器的基于eCos的驱动。
6，future work
1，将if_sdcmsc.c移植到linux上，实现SD卡的基本I/O操作。
2，基于linux系统，实现SD卡文件系统的挂载。
3，修改eCos的fatfs代码，使之能自动识别boot record的起始地址。
7，附录 code list
1>驱动：if_sdcmsc.c
//=========================================================================
//
// if_sdcmsc.c
//
// Provide a disk device driver for SDCard Mass Storage Controller
//
//==========================================================================
// ####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 2004, 2006 Free Software Foundation, Inc.
//
// eCos is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 2 or (at your option) any later
// version.
//
// eCos is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
// for more details.
//
// You should have received a copy of the GNU General Public License
// along with eCos; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
// As a special exception, if other files instantiate templates or use
// macros or inline functions from this file, or you compile this file
// and link it with other works to produce a work based on this file,
// this file does not by itself cause the resulting work to be covered by
// the GNU General Public License. However the source code for this file
// must still be made available in accordance with section (3) of the GNU
// General Public License v2.
//
// This exception does not invalidate any other reasons why a work based
// on this file might be covered by the GNU General Public License.
// -------------------------------------------
// ####ECOSGPLCOPYRIGHTEND####
//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author: Piotr Skrzypek
// Date: 2012-05-01
//
//####DESCRIPTIONEND####
//==========================================================================
#include <pkgconf/system.h>
#include <cyg/infra/cyg_type.h>
#include <cyg/infra/cyg_ass.h>
#include <cyg/infra/diag.h>
#include <cyg/hal/hal_arch.h>
#include <cyg/hal/hal_if.h>
#include <cyg/hal/hal_intr.h>
#include <string.h>
#include <errno.h>
#include <cyg/io/io.h>
#include <cyg/io/devtab.h>
#include <cyg/io/disk.h>
// Settings exported from CDL
#include <pkgconf/devs_disk_opencores_sdcmsc.h>
// SDCMSC address space
#define SDCMSC_BASE 0x9e000000
// Register space
#define SDCMSC_ARGUMENT 0x00
#define SDCMSC_COMMAND 0x04
#define SDCMSC_CARD_STATUS 0x08
#define SDCMSC_RESPONSE 0x0C
#define SDCMSC_CONTROLLER_SETTING 0x1C
#define SDCMSC_BLOCK_SIZE 0x20
#define SDCMSC_POWER_CONTROL 0x24
#define SDCMSC_SOFTWARE_RESET 0x28
#define SDCMSC_TIMEOUT 0x2C
#define SDCMSC_NORMAL_INT_STATUS 0x30
#define SDCMSC_ERROR_INT_STATUS 0x34
#define SDCMSC_NORMAL_INT_ENABLE 0x38
#define SDCMSC_ERROR_INT_ENABLE 0x3C
#define SDCMSC_CAPABILITY 0x48
#define SDCMSC_CLOCK_DIVIDER 0x4C
#define SDCMSC_BD_BUFFER_STATUS 0x50
#define SDCMSC_DAT_INT_STATUS 0x54
#define SDCMSC_DAT_INT_ENABLE 0x58
#define SDCMSC_BD_RX 0x60
#define SDCMSC_BD_TX 0x80
// SDCMSC_COMMAND bits
#define SDCMSC_COMMAND_CMDI(x) (x << 8)
#define SDCMSC_COMMAND_CMDW(x) (x << 6)
#define SDCMSC_COMMAND_CICE 0x10
#define SDCMSC_COMMAND_CIRC 0x08
#define SDCMSC_COMMAND_RTS_48 0x02
#define SDCMSC_COMMAND_RTS_136 0x01
//SDCMSC_CARD_STATUS bits
#define SDCMSC_CARD_STATUS_CICMD 0x01
// SDCMSC_NORMAL_INT_STATUS bits
#define SDCMSC_NORMAL_INT_STATUS_EI 0x8000
#define SDCMSC_NORMAL_INT_STATUS_CC 0x0001
// SDCMSC_DAT_INT_STATUS
#define SDCMSC_DAT_INT_STATUS_TRS 0x01
typedef struct cyg_sdcmsc_disk_info_t {
int is_v20;
int is_sdhc;
cyg_uint32 rca;
int connected;
} cyg_sdcmsc_disk_info_t;
static int sdcmsc_card_cmd(cyg_uint32 cmd,
cyg_uint32 arg,
cyg_uint32 *response) {
// Send command to card
HAL_WRITE_UINT32(SDCMSC_BASE + SDCMSC_COMMAND, cmd);
HAL_WRITE_UINT32(SDCMSC_BASE + SDCMSC_ARGUMENT, arg);
// Wait for response
cyg_uint32 reg;
cyg_uint32 mask = SDCMSC_NORMAL_INT_STATUS_EI |
SDCMSC_NORMAL_INT_STATUS_CC;
do {
HAL_READ_UINT32(SDCMSC_BASE + SDCMSC_NORMAL_INT_STATUS, reg);
} while(!(reg & mask));
HAL_WRITE_UINT32(SDCMSC_BASE + SDCMSC_NORMAL_INT_STATUS, 0);
// Optionally read response register
if(response) {
HAL_READ_UINT32(SDCMSC_BASE + SDCMSC_RESPONSE, *response);
}
// Check for errors
if(reg & SDCMSC_NORMAL_INT_STATUS_EI) {
HAL_READ_UINT32(SDCMSC_BASE + SDCMSC_ERROR_INT_STATUS, reg);
if(reg & (1 << 3)) diag_printf("Command index error
");
if(reg & (1 << 1)) diag_printf("Command CRC error
");
if(reg & (1 << 0)) diag_printf("Command timeout
");
HAL_WRITE_UINT32(SDCMSC_BASE + SDCMSC_ERROR_INT_STATUS, 0);
return 0;
}
else {
return 1;
}
}
// Card initialization and identification implemented according to
// Physical Layer Simplified Specification Version 3.01
static int sdcmsc_card_init(cyg_sdcmsc_disk_info_t *data,
char *serial,
char *firmware_rev,
char *model_num,
cyg_uint32 *capacity) {
cyg_uint32 reg;
cyg_uint32 cmd;
cyg_uint32 arg;
// Send CMD0 to switch the card to idle state
cmd = SDCMSC_COMMAND_CMDI(0);
if(!sdcmsc_card_cmd(cmd, 0, NULL)) return 0;
// Send CMD8 offering 2.7V to 3.6V range
// If the card doesn't responde it means either:
// 1. Card supports v2.0 but can't communicate using
// current voltage levels
// 2. Card does not support v2.0
cmd = SDCMSC_COMMAND_CMDI(8) |
SDCMSC_COMMAND_CICE |
SDCMSC_COMMAND_CIRC |
SDCMSC_COMMAND_RTS_48;
data->is_v20 = sdcmsc_card_cmd(cmd, 0x1AA, NULL);
diag_printf("is_v20:0x%x
",data->is_v20);//rill add debug
do {
HAL_READ_UINT32(SDCMSC_BASE + SDCMSC_CARD_STATUS, reg);
} while(reg & SDCMSC_CARD_STATUS_CICMD);
// Repeat ACMD41 until card set the busy bit to 1
// Since ACMD is an extended command, it must be preceded
// by CMD55
do {
cmd = SDCMSC_COMMAND_CMDI(55) |
SDCMSC_COMMAND_CICE |
SDCMSC_COMMAND_CIRC |
SDCMSC_COMMAND_RTS_48;
if(!sdcmsc_card_cmd(cmd, 0, NULL)) return 0;
cmd = SDCMSC_COMMAND_CMDI(41) |
SDCMSC_COMMAND_RTS_48;
arg = data->is_v20 ?
0x40FF8000 :
0x00FF8000;
if(!sdcmsc_card_cmd(cmd, arg, ®)) return 0;
} while(!(reg & 0x80000000));
data->is_sdhc = !!(reg & 0x40000000);
diag_printf("is_sdhc:0x%x
",data->is_sdhc);
// Issue CMD2 to switch from ready state to ident. Unfortunately, it is
// not possible to read whole CID because the command can be issued only
// once, and the peripheral can store only 32bit of the command at once.
cmd = SDCMSC_COMMAND_CMDI(2) |
SDCMSC_COMMAND_RTS_136;
if(!sdcmsc_card_cmd(cmd, 0, NULL)) return 0;
// Issue CMD3 to get RCA and switch from ident state to stby.
cmd = SDCMSC_COMMAND_CMDI(3) |
SDCMSC_COMMAND_CICE |
SDCMSC_COMMAND_CIRC |
SDCMSC_COMMAND_RTS_48;
if(!sdcmsc_card_cmd(cmd, 0, ®)) return 0;
data->rca = reg & 0xFFFF0000;
diag_printf("rca:0x%x
",data->rca);
// Calculate card capacity. Use information stored in CSD register.
cyg_uint32 card_capacity;
if(data->is_sdhc) {
cmd = SDCMSC_COMMAND_CMDI(9) |
SDCMSC_COMMAND_CMDW(1) |
SDCMSC_COMMAND_RTS_136;
if(!sdcmsc_card_cmd(cmd, data->rca, ®)) return 0;
card_capacity = reg & 0x3F;
card_capacity <<= 16;
cmd = SDCMSC_COMMAND_CMDI(9) |
SDCMSC_COMMAND_CMDW(2) |
SDCMSC_COMMAND_RTS_136;
if(!sdcmsc_card_cmd(cmd, data->rca, ®)) return 0;
reg >>= 16;
card_capacity |= reg;
card_capacity += 1;
card_capacity *= 1000;
}
else {
cmd = SDCMSC_COMMAND_CMDI(9) |
SDCMSC_COMMAND_CMDW(1) |
SDCMSC_COMMAND_RTS_136;
if(!sdcmsc_card_cmd(cmd, data->rca, ®)) return 0;
cyg_uint32 read_bl_len = (reg >> 16) & 0x0F;
cyg_uint32 c_size = reg & 0x3FF;
c_size <<= 2;
cmd = SDCMSC_COMMAND_CMDI(9) |
SDCMSC_COMMAND_CMDW(2) |
SDCMSC_COMMAND_RTS_136;
if(!sdcmsc_card_cmd(cmd, data->rca, ®)) return 0;
c_size |= (reg >> 30) & 0x03;
cyg_uint32 c_size_mult = (reg >> 15) & 0x07;
card_capacity = c_size + 1;
card_capacity *= 1 << (c_size_mult + 2);
card_capacity *= 1 << (read_bl_len);
card_capacity >>= 9;
}
diag_printf("card capacity:0x%x
",card_capacity);
// Fill disk identification struct using information in CID register
// use OEM/APPlication ID field to fill model_num,
// Product revision field to fill firmware_rev,
// and Product serial number to field to fill serial
cmd = SDCMSC_COMMAND_CMDI(10) |
SDCMSC_COMMAND_CMDW(0) |
SDCMSC_COMMAND_RTS_136;
if(!sdcmsc_card_cmd(cmd, data->rca, ®)) return 0;
model_num[0] = (reg >> 16) & 0xFF;
model_num[1] = (reg >> 8) & 0xFF;
model_num[2] = 0;
cmd = SDCMSC_COMMAND_CMDI(10) |
SDCMSC_COMMAND_CMDW(2) |
SDCMSC_COMMAND_RTS_136;
if(!sdcmsc_card_cmd(cmd, data->rca, ®)) return 0;
firmware_rev[0] = (reg >> 24) & 0xFF;
firmware_rev[1] = 0;
serial[0] = (reg >> 16) & 0xFF;
serial[1] = (reg >> 8) & 0xFF;
serial[2] = reg & 0xFF;
cmd = SDCMSC_COMMAND_CMDI(10) |
SDCMSC_COMMAND_CMDW(3) |
SDCMSC_COMMAND_RTS_136;
if(!sdcmsc_card_cmd(cmd, data->rca, ®)) return 0;
serial[3] = (reg >> 24) & 0xFF;
// Put card in transfer state
cmd = SDCMSC_COMMAND_CMDI(7) |
SDCMSC_COMMAND_CICE |
SDCMSC_COMMAND_CIRC |
SDCMSC_COMMAND_RTS_48;
if(!sdcmsc_card_cmd(cmd, data->rca, ®)) return 0;
if(reg != 0x700) return 0;
// Set block size to 512
cmd = SDCMSC_COMMAND_CMDI(16) |
SDCMSC_COMMAND_CICE |
SDCMSC_COMMAND_CIRC |
SDCMSC_COMMAND_RTS_48;
if(!sdcmsc_card_cmd(cmd, 512, NULL)) return 0;
// Set 4-bits bus mode
cmd = SDCMSC_COMMAND_CMDI(55) |
SDCMSC_COMMAND_CICE |
SDCMSC_COMMAND_CIRC |
SDCMSC_COMMAND_RTS_48;
if(!sdcmsc_card_cmd(cmd, data->rca, NULL)) return 0;
cmd = SDCMSC_COMMAND_CMDI(6) |
SDCMSC_COMMAND_CICE |
SDCMSC_COMMAND_CIRC |
SDCMSC_COMMAND_RTS_48;
if(!sdcmsc_card_cmd(cmd, 0x02, NULL)) return 0;
diag_printf("sdc init success!
");
return 1;
}
static int sdcmsc_card_queue(cyg_sdcmsc_disk_info_t *data,
int direction_transmit,
int block_addr,
cyg_uint32 buffer_addr) {
// SDSC cards use byte addressing, while SDHC use block addressing.
// It is therefore required to multiply the address by 512 if
// we are dealing with SDSC card, to remain compatible with the API.
if(!data->is_sdhc) {
block_addr <<= 9;
}
if(direction_transmit) {
HAL_WRITE_UINT32(SDCMSC_BASE + SDCMSC_BD_TX, buffer_addr);
HAL_WRITE_UINT32(SDCMSC_BASE + SDCMSC_BD_TX, block_addr);
}
else {
HAL_WRITE_UINT32(SDCMSC_BASE + SDCMSC_BD_RX, buffer_addr);
HAL_WRITE_UINT32(SDCMSC_BASE + SDCMSC_BD_RX, block_addr);
}
// Now wait for the response
cyg_uint32 reg;
do {
HAL_READ_UINT32(SDCMSC_BASE + SDCMSC_DAT_INT_STATUS, reg);
} while(!reg);
HAL_WRITE_UINT32(SDCMSC_BASE + SDCMSC_DAT_INT_STATUS, 0);
// Check for errors
if(reg == SDCMSC_DAT_INT_STATUS_TRS) {
return 1;
}
else {
if(reg & (1 << 5)) diag_printf("Transmission error
");
if(reg & (1 << 4)) diag_printf("Command error
");
if(reg & (1 << 2)) diag_printf("FIFO error
");
if(reg & (1 << 1)) diag_printf("Retry error
");
return 0;
}
}
// This is an API function. Is is called once, in the beginning
static cyg_bool sdcmsc_disk_init(struct cyg_devtab_entry* tab) {
// Set highest possible timeout
HAL_WRITE_UINT32(SDCMSC_BASE + SDCMSC_TIMEOUT, 0xFFFE);
// Reset the peripheral
HAL_WRITE_UINT32(SDCMSC_BASE + SDCMSC_SOFTWARE_RESET, 1);
HAL_WRITE_UINT32(SDCMSC_BASE + SDCMSC_CLOCK_DIVIDER, 2);
HAL_WRITE_UINT32(SDCMSC_BASE + SDCMSC_SOFTWARE_RESET, 0);
// Call upper level
disk_channel* ch = (disk_channel*) tab->priv;
return (*ch->callbacks->disk_init)(tab);
}
// This function is called when user mounts the disk
static Cyg_ErrNo sdcmsc_disk_lookup(struct cyg_devtab_entry** tab,
struct cyg_devtab_entry *sub_tab,
const char* name) {
disk_channel *ch = (disk_channel*) (*tab)->priv;
cyg_sdcmsc_disk_info_t *data = (cyg_sdcmsc_disk_info_t*) ch->dev_priv;
// If the card was not initialized yet, it's time to do it
// and call disk_connected callback
if(!data->connected) {
cyg_disk_identify_t id;
// Pass dummy CHS geometry and hope the upper level
// will use LBA mode. To guess CHS we would need to
// analyze partition table and confront LBA and CHS
// addresses. And it would work only if proper LBA
// field is stored in MBR. Is is definitely something
// that should be done by upper level.
id.cylinders_num = 1;
id.heads_num = 1;
id.sectors_num = 1;
id.phys_block_size = 1;
id.max_transfer = 512;
// Initialize the card
data->connected = sdcmsc_card_init(data,
id.serial,
id.firmware_rev,
id.model_num,
&id.lba_sectors_num);
if(data->connected) {
// Let upper level know there is a new disk
(*ch->callbacks->disk_connected)(*tab, &id);
}
}
// Call upper level
return (*ch->callbacks->disk_lookup)(tab, sub_tab, name);
}
// API function to read block from the disk
static Cyg_ErrNo sdcmsc_disk_read(disk_channel* ch,
void* buf,
cyg_uint32 blocks,
cyg_uint32 first_block) {
cyg_sdcmsc_disk_info_t *data = (cyg_sdcmsc_disk_info_t*) ch->dev_priv;
int i;
int result;
cyg_uint32 reg;
for(i = 0; i < blocks; i++) {
// Check for free receive buffers
HAL_READ_UINT32(SDCMSC_BASE + SDCMSC_BD_BUFFER_STATUS, reg);
reg >>= 8;
reg &= 0xFF;
if(reg == 0) {
return -EIO;
}
result = sdcmsc_card_queue(data, 0, first_block, (cyg_uint32) buf);
if(!result) {
return -EIO;
}
}
return ENOERR;
}
// API function to write block to disk
static Cyg_ErrNo sdcmsc_disk_write(disk_channel* ch,
const void* buf,
cyg_uint32 blocks,
cyg_uint32 first_block) {
cyg_sdcmsc_disk_info_t *data = (cyg_sdcmsc_disk_info_t*) ch->dev_priv;
int i;
int result;
cyg_uint32 reg;
for(i = 0; i < blocks; i++) {
// Check for free transmit buffers
HAL_READ_UINT32(SDCMSC_BASE + SDCMSC_BD_BUFFER_STATUS, reg);
reg &= 0xFF;
if(reg == 0) {
return -EIO;
}
result = sdcmsc_card_queue(data, 1, first_block, (cyg_uint32) buf);
if(!result) {
return -EIO;
}
}
return ENOERR;
}
// API function to fetch driver configuration and disk info.
static Cyg_ErrNo sdcmsc_disk_get_config(disk_channel* ch,
cyg_uint32 key,
const void* buf,
cyg_uint32* len) {
CYG_UNUSED_PARAM(disk_channel*, ch);
CYG_UNUSED_PARAM(cyg_uint32, key);
CYG_UNUSED_PARAM(const void*, buf);
CYG_UNUSED_PARAM(cyg_uint32*, len);
return -EINVAL;
}
// API function to update driver status information.
static Cyg_ErrNo sdcmsc_disk_set_config(disk_channel* ch,
cyg_uint32 key,
const void* buf,
cyg_uint32* len) {
cyg_sdcmsc_disk_info_t *data = (cyg_sdcmsc_disk_info_t*) ch->dev_priv;
if(key == CYG_IO_SET_CONFIG_DISK_UMOUNT) {
if(ch->info->mounts == 0) {
data->connected = false;
return (ch->callbacks->disk_disconnected)(ch);
}
else {
return ENOERR;
}
}
else {
return -EINVAL;
}
}
// Register the driver in the system
static cyg_sdcmsc_disk_info_t cyg_sdcmsc_disk0_hwinfo = {
.connected = 0
};
DISK_FUNS(cyg_sdcmsc_disk_funs,
sdcmsc_disk_read,
sdcmsc_disk_write,
sdcmsc_disk_get_config,
sdcmsc_disk_set_config
);
DISK_CONTROLLER(cyg_sdcmsc_disk_controller_0, cyg_sdcmsc_disk0_hwinfo);
DISK_CHANNEL(cyg_sdcmsc_disk0_channel,
cyg_sdcmsc_disk_funs,
cyg_sdcmsc_disk0_hwinfo,
cyg_sdcmsc_disk_controller_0,
true, //mbr supported
4 //partitions
);
BLOCK_DEVTAB_ENTRY(cyg_sdcmsc_disk0_devtab_entry,
CYGDAT_DEVS_DISK_OPENCORES_SDCMSC_DISK0_NAME,
0,
&cyg_io_disk_devio,
&sdcmsc_disk_init,
&sdcmsc_disk_lookup,
&cyg_sdcmsc_disk0_channel);
// EOF if_sdcmsc.c
2>测试程序：helloworld.c,Makefile
1》helloworld.c
//==========================================================================
//
// fatfs1.c
//
// Test fileio system
//
//==========================================================================
// ####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 1998, 1999, 2000, 2001, 2002, 2004 Free Software Foundation, Inc.
//
// eCos is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 2 or (at your option) any later
// version.
//
// eCos is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
// for more details.
//
// You should have received a copy of the GNU General Public License
// along with eCos; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
// As a special exception, if other files instantiate templates or use
// macros or inline functions from this file, or you compile this file
// and link it with other works to produce a work based on this file,
// this file does not by itself cause the resulting work to be covered by
// the GNU General Public License. However the source code for this file
// must still be made available in accordance with section (3) of the GNU
// General Public License v2.
//
// This exception does not invalidate any other reasons why a work based
// on this file might be covered by the GNU General Public License.
// -------------------------------------------
// ####ECOSGPLCOPYRIGHTEND####
//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s): nickg
// Contributors: nickg
// Date: 2000-05-25
// Purpose: Test fileio system
// Description: This test uses the testfs to check out the initialization
// and basic operation of the fileio system
//
//
//
//
//
//
//
//####DESCRIPTIONEND####
//
//==========================================================================
#include <pkgconf/hal.h>
#include <pkgconf/io_fileio.h>
#include <pkgconf/fs_fat.h>
#include <cyg/infra/cyg_trac.h> // tracing macros
#include <cyg/infra/cyg_ass.h> // assertion macros
#include <unistd.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <errno.h>
#include <string.h>
#include <dirent.h>
#include <stdio.h>
#include <cyg/fileio/fileio.h>
#include <cyg/infra/testcase.h>
#include <cyg/infra/diag.h> // HAL polled output
#include <cyg/fs/fatfs.h>
//==========================================================================
#define SHOW_RESULT( _fn, _res )
diag_printf("<FAIL>: " #_fn "() returned %d %s
", _res, _res<0?strerror(errno):"");
//==========================================================================
#define IOSIZE 100
#define LONGNAME1 "long_file_name_that_should_take_up_more_than_one_directory_entry_1"
#define LONGNAME2 "long_file_name_that_should_take_up_more_than_one_directory_entry_2"
//==========================================================================
#ifndef CYGPKG_LIBC_STRING
char *strcat( char *s1, const char *s2 )
{
char *s = s1;
while( *s1 ) s1++;
while( (*s1++ = *s2++) != 0);
return s;
}
#endif
//==========================================================================
static void listdir( char *name, int statp, int numexpected, int *numgot )
{
int err;
DIR *dirp;
int num=0;
diag_printf("<INFO>: reading directory %s
",name);
dirp = opendir( name );
if( dirp == NULL ) SHOW_RESULT( opendir, -1 );
for(;;)
{
struct dirent *entry = readdir( dirp );
if( entry == NULL )
break;
num++;
diag_printf("<INFO>: entry %14s",entry->d_name);
#ifdef CYGPKG_FS_FAT_RET_DIRENT_DTYPE
diag_printf(" d_type %2x", entry->d_type);
#endif
if( statp )
{
char fullname[PATH_MAX];
struct stat sbuf;
if( name[0] )
{
strcpy(fullname, name );
if( !(name[0] == '/' && name[1] == 0 ) )
strcat(fullname, "/" );
}
else fullname[0] = 0;
strcat(fullname, entry->d_name );
err = stat( fullname, &sbuf );
if( err < 0 )
{
if( errno == ENOSYS )
diag_printf(" <no status available>");
else SHOW_RESULT( stat, err );
}
else
{
diag_printf(" [mode %08x ino %08x nlink %d size %ld]",
sbuf.st_mode,sbuf.st_ino,sbuf.st_nlink,(long)sbuf.st_size);
}
#ifdef CYGPKG_FS_FAT_RET_DIRENT_DTYPE
if ((entry->d_type & S_IFMT) != (sbuf.st_mode & S_IFMT))
CYG_TEST_FAIL("File mode's don't match between dirent and stat");
#endif
}
diag_printf("
");
}
err = closedir( dirp );
if( err < 0 ) SHOW_RESULT( stat, err );
if (numexpected >= 0 && num != numexpected)
CYG_TEST_FAIL("Wrong number of dir entries
");
if ( numgot != NULL )
*numgot = num;
}
//==========================================================================
static void createfile( char *name, size_t size )
{
char buf[IOSIZE];
int fd;
ssize_t wrote;
int i;
int err;
diag_printf("<INFO>: create file %s size %zd
",name,size);
err = access( name, F_OK );
if( err < 0 && errno != EACCES ) SHOW_RESULT( access, err );
for( i = 0; i < IOSIZE; i++ ) buf[i] = i%256;
fd = open( name, O_WRONLY|O_CREAT );
if( fd < 0 ) SHOW_RESULT( open, fd );
while( size > 0 )
{
ssize_t len = size;
if ( len > IOSIZE ) len = IOSIZE;
wrote = write( fd, buf, len );
if( wrote != len ) SHOW_RESULT( write, (int)wrote );
size -= wrote;
}
err = close( fd );
if( err < 0 ) SHOW_RESULT( close, err );
}
//==========================================================================
static void maxfile( char *name )
{
char buf[IOSIZE];
int fd;
ssize_t wrote;
int i;
int err;
size_t size = 0;
size_t prevsize = 0;
diag_printf("<INFO>: create maximal file %s
",name);
diag_printf("<INFO>: This may take a few minutes
");
err = access( name, F_OK );
if( err < 0 && errno != EACCES ) SHOW_RESULT( access, err );
for( i = 0; i < IOSIZE; i++ ) buf[i] = i%256;
fd = open( name, O_WRONLY|O_CREAT );
if( fd < 0 ) SHOW_RESULT( open, fd );
do
{
wrote = write( fd, buf, IOSIZE );
//if( wrote < 0 ) SHOW_RESULT( write, wrote );
if( wrote >= 0 )
size += wrote;
if( (size-prevsize) > 100000 )
{
diag_printf("<INFO>: size = %zd
", size);
prevsize = size;
}
} while( wrote == IOSIZE );
diag_printf("<INFO>: file size == %zd
",size);
err = close( fd );
if( err < 0 ) SHOW_RESULT( close, err );
}
//==========================================================================
static void checkfile( char *name )
{
char buf[IOSIZE];
int fd;
ssize_t done;
int i;
int err;
off_t pos = 0;
diag_printf("<INFO>: check file %s
",name);
err = access( name, F_OK );
if( err != 0 ) SHOW_RESULT( access, err );
fd = open( name, O_RDONLY );
if( fd < 0 ) SHOW_RESULT( open, fd );
for(;;)
{
done = read( fd, buf, IOSIZE );
if( done < 0 ) SHOW_RESULT( read, (int)done );
if( done == 0 ) break;
for( i = 0; i < done; i++ )
if( buf[i] != i%256 )
{
diag_printf("buf[%ld+%d](%02x) != %02x
",pos,i,buf[i],i%256);
CYG_TEST_FAIL("Data read not equal to data written
");
}
pos += done;
}
err = close( fd );
if( err < 0 ) SHOW_RESULT( close, err );
}
#ifdef CYGCFG_FS_FAT_USE_ATTRIBUTES
//==========================================================================
static void checkattrib(const char *name,
const cyg_fs_attrib_t test_attrib )
{
int err;
cyg_fs_attrib_t file_attrib;
diag_printf("<INFO>: check attrib %s
",name);
err = cyg_fs_get_attrib(name, &file_attrib);
if( err != 0 ) SHOW_RESULT( stat, err );
if ( (file_attrib & S_FATFS_ATTRIB) != test_attrib )
diag_printf("<FAIL>: attrib %s incorrect
Expected %x Was %x
",
name,test_attrib,(file_attrib & S_FATFS_ATTRIB));
}
#endif // CYGCFG_FS_FAT_USE_ATTRIBUTES
//==========================================================================
static void copyfile( char *name2, char *name1 )
{
int err;
char buf[IOSIZE];
int fd1, fd2;
ssize_t done, wrote;
diag_printf("<INFO>: copy file %s -> %s
",name2,name1);
err = access( name1, F_OK );
if( err < 0 && errno != EACCES ) SHOW_RESULT( access, err );
err = access( name2, F_OK );
if( err != 0 ) SHOW_RESULT( access, err );
fd1 = open( name1, O_WRONLY|O_CREAT );
if( fd1 < 0 ) SHOW_RESULT( open, fd1 );
fd2 = open( name2, O_RDONLY );
if( fd2 < 0 ) SHOW_RESULT( open, fd2 );
for(;;)
{
done = read( fd2, buf, IOSIZE );
if( done < 0 ) SHOW_RESULT( read, (int)done );
if( done == 0 ) break;
wrote = write( fd1, buf, done );
if( wrote != done ) SHOW_RESULT( write, (int) wrote );
if( wrote != done ) break;
}
err = close( fd1 );
if( err < 0 ) SHOW_RESULT( close, err );
err = close( fd2 );
if( err < 0 ) SHOW_RESULT( close, err );
}
//==========================================================================
static void comparefiles( char *name2, char *name1 )
{
int err;
char buf1[IOSIZE];
char buf2[IOSIZE];
int fd1, fd2;
ssize_t done1, done2;
int i;
diag_printf("<INFO>: compare files %s == %s
",name2,name1);
err = access( name1, F_OK );
if( err != 0 ) SHOW_RESULT( access, err );
err = access( name1, F_OK );
if( err != 0 ) SHOW_RESULT( access, err );
fd1 = open( name1, O_RDONLY );
if( fd1 < 0 ) SHOW_RESULT( open, fd1 );
fd2 = open( name2, O_RDONLY );
if( fd2 < 0 ) SHOW_RESULT( open, fd2 );
for(;;)
{
done1 = read( fd1, buf1, IOSIZE );
if( done1 < 0 ) SHOW_RESULT( read, (int)done1 );
done2 = read( fd2, buf2, IOSIZE );
if( done2 < 0 ) SHOW_RESULT( read, (int)done2 );
if( done1 != done2 )
diag_printf("Files different sizes
");
if( done1 == 0 ) break;
for( i = 0; i < done1; i++ )
if( buf1[i] != buf2[i] )
{
diag_printf("buf1[%d](%02x) != buf1[%d](%02x)
",i,buf1[i],i,buf2[i]);
CYG_TEST_FAIL("Data in files not equal
");
}
else
{
diag_printf("buf1[%d](%02x) == buf2[%d](%02x)
",i,buf1[i],i,buf2[i]);
}
}
err = close( fd1 );
if( err < 0 ) SHOW_RESULT( close, err );
err = close( fd2 );
if( err < 0 ) SHOW_RESULT( close, err );
}
//==========================================================================
void checkcwd( const char *cwd )
{
static char cwdbuf[PATH_MAX];
char *ret;
ret = getcwd( cwdbuf, sizeof(cwdbuf));
if( ret == NULL ) SHOW_RESULT( getcwd, (int)ret );
if( strcmp( cwdbuf, cwd ) != 0 )
{
diag_printf( "cwdbuf %s cwd %s
",cwdbuf, cwd );
CYG_TEST_FAIL( "Current directory mismatch");
}
}
//==========================================================================
// main
int main( int argc, char **argv )
{
int err;
int existingdirents=-1;
int fd = 0;
char buff[20] = {0};
char buff1[20] = {0};
int loop = 0;
FILE *fp = NULL;
CYG_TEST_INIT();
err = mount("/dev/mmcdisk0/","/","fatfs");
if( err < 0 )
{
SHOW_RESULT( mount, err );
}
else
{
diag_printf("mount ok!
");
}
err = chdir( "/" );
if( err < 0 )
{
SHOW_RESULT( chdir, err );
}
else
{
diag_printf("chdir ok!
");
}
checkcwd( "/" );
listdir( "/", true, -1, &existingdirents );
createfile( "/mkg_rill", 10 );
checkfile( "mkg_rill" );
copyfile( "mkg_rill", "mkg_rill_bak");
checkfile( "mkg_rill_bak" );
comparefiles( "mkg_rill_bak", "/mkg_rill" );
#if 0
diag_printf("<INFO>: mkdir bar
");
err = mkdir( "/bar", 0 );
if( err < 0 ) SHOW_RESULT( mkdir, err );
listdir( "/" , true, existingdirents+3, NULL );
copyfile( "fee", "/bar/fum" );
checkfile( "bar/fum" );
comparefiles( "/fee", "bar/fum" );
diag_printf("<INFO>: cd bar
");
err = chdir( "bar" );
if( err < 0 ) SHOW_RESULT( chdir, err );
checkcwd( "/bar" );
diag_printf("<INFO>: rename /foo bundy
");
err = rename( "/foo", "bundy" );
if( err < 0 ) SHOW_RESULT( rename, err );
listdir( "/", true, existingdirents+2, NULL );
listdir( "" , true, 4, NULL );
checkfile( "/bar/bundy" );
comparefiles("/fee", "bundy" );
diag_printf("<INFO>: unlink fee
");
err = unlink( "/fee" );
if( err < 0 ) SHOW_RESULT( unlink, err );
diag_printf("<INFO>: unlink fum
");
err = unlink( "fum" );
if( err < 0 ) SHOW_RESULT( unlink, err );
diag_printf("<INFO>: unlink /bar/bundy
");
err = unlink( "/bar/bundy" );
if( err < 0 ) SHOW_RESULT( unlink, err );
diag_printf("<INFO>: cd /
");
err = chdir( "/" );
if( err < 0 ) SHOW_RESULT( chdir, err );
checkcwd( "/" );
diag_printf("<INFO>: rmdir /bar
");
err = rmdir( "/bar" );
if( err < 0 ) SHOW_RESULT( rmdir, err );
listdir( "/", false, existingdirents, NULL );
#endif
err = umount( "/" );
if( err < 0 ) SHOW_RESULT( umount, err );
CYG_TEST_PASS_FINISH("fatfs1");
}
// -------------------------------------------------------------------------
// EOF fatfs1.c
2》Makefile
# This variable should point to the directory where you # installed your eCos build. ECOS_INSTALL := /home/openrisc/share/eCos/ecos-work/install # As part of the build process, eCos automatically creates # a file with compiler flags. Those flags are computed based # on the ecc configuration file. It is smart to use them when # compiling your application. include $(ECOS_INSTALL)/include/pkgconf/ecos.mak # Unfortunately, some flags are C++ flags and some are C. We # need to separate them. The file rules.mak shipped with the eCos # repository contains the rules to do it. So we need to include # this file in the end of the makefile and use more generic # names. We also add the paths to the installation directory. CFLAGS := $(ECOS_GLOBAL_CFLAGS) -I $(ECOS_INSTALL)/include LDFLAGS := $(ECOS_GLOBAL_LDFLAGS) -L $(ECOS_INSTALL)/lib -T $(ECOS_INSTALL)/lib/target.ld # Rules to build the application all: hello_world hello_world: hello_world.c $(ECOS_COMMAND_PREFIX)gcc $(ACTUAL_CFLAGS) $(LDFLAGS) $< -o $@ # Now include the file with rules. This file must be included # in the end, otherwise it interferes with the makefile target. #include $(ECOS_REPOSITORY)/pkgconf/rules.mak include /home/openrisc/share/eCos/packages/pkgconf/rules.mak
3>read_boot_record()函数修改
static int
read_boot_record(fatfs_disk_t *disk, fat_boot_record_t *fbr)
{
cyg_uint8 data[0x5A];
cyg_uint32 len;
int err;
len = 0x5A;
err = disk_read(disk, (void*)data, &len, 0x10e00);//Rill modify at 130717
if (err != ENOERR)
return err;
GET_WORD(data, fbr->jump, 0x00);
GET_BYTES(data, fbr->oem_name, 8, 0x03);
GET_WORD(data, fbr->bytes_per_sec, 0x0B);
GET_BYTE(data, fbr->sec_per_clu, 0x0D);
GET_WORD(data, fbr->res_sec_num, 0x0E);
GET_BYTE(data, fbr->fat_tbls_num, 0x10);
GET_WORD(data, fbr->max_root_dents, 0x11);
GET_WORD(data, fbr->sec_num_32, 0x13);
GET_BYTE(data, fbr->media_desc, 0x15);
GET_WORD(data, fbr->sec_per_fat, 0x16);
GET_WORD(data, fbr->sec_per_track, 0x18);
GET_WORD(data, fbr->heads_num, 0x1A);
GET_DWORD(data, fbr->hsec_num, 0x1C);
GET_DWORD(data, fbr->sec_num, 0x20);
// This is a quick check for FAT12/16 or FAT32 boot record.
// The sec_per_fat field must be 0 on FAT32, since this
// field plays a crucial role in detection of the FAT type
// (12,16,32) it is quite safe to make this assumption.
if (0 == fbr->sec_per_fat)
{
GET_DWORD(data, fbr->sec_per_fat_32, 0x24);
GET_WORD(data, fbr->ext_flags, 0x28);
GET_WORD(data, fbr->fs_ver, 0x2A);
GET_DWORD(data, fbr->root_cluster, 0x2C);
GET_WORD(data, fbr->fs_info_sec, 0x30);
GET_WORD(data, fbr->bk_boot_sec, 0x32);
GET_BYTE(data, fbr->drv_num, 0x40);
GET_BYTE(data, fbr->ext_sig, 0x42);
GET_DWORD(data, fbr->ser_num, 0x43);
GET_BYTES(data, fbr->vol_name, 11, 0x47);
GET_BYTES(data, fbr->fat_name, 8, 0x52);
}
else
{
GET_BYTE(data, fbr->drv_num, 0x24);
GET_BYTE(data, fbr->ext_sig, 0x26);
GET_DWORD(data, fbr->ser_num, 0x27);
GET_BYTES(data, fbr->vol_name, 11, 0x2B);
GET_BYTES(data, fbr->fat_name, 8, 0x36);
}
// Read the end marker
len = 0x02;
err = disk_read(disk, (void*)data, &len, 0x1FE);
if (err != ENOERR)
return err;
GET_BYTES(data, fbr->exe_marker, 2, 0);
// Zero terminate strings
fbr->oem_name[8] = ' ';
fbr->vol_name[11] = ' ';
fbr->fat_name[8] = ' ';
#if TDE
print_boot_record(fbr);
#endif
return ENOERR;
}