}/* Take a well-known service name so that clients can find us */r =sd_bus_request_name(bus,"net.poettering.Calculator",0);if(r <0) {fprintf(stderr,"Failed to acquire service name: %s\n",strerror(-r));gotofinish; }for(;;) {/* Process requests */r =sd_bus_process(bus,NU...
Informs the bus driver to perform the abort I/O procedure, using CMD52, for the I/O function receiving the request. The abort procedure is used in conjunction with CMD53 when the number of blocks in the command argument is set to zero. This value in the command argument instructs the ...
Informs the bus driver to perform the abort I/O procedure, usingCMD52, for the I/O function receiving the request. The abort procedure is used in conjunction withCMD53when the number of blocks in the command argument is set to zero. This value in the command argument instructs the I/O...
SD_BUS_TYPE_BOOLEAN = 'b', SD_BUS_TYPE_INT16 = 'n', SD_BUS_TYPE_UINT16 = 'q', SD_BUS_TYPE_INT32 = 'i', SD_BUS_TYPE_UINT32 = 'u', SD_BUS_TYPE_INT64 = 'x', SD_BUS_TYPE_UINT64 = 't', SD_BUS_TYPE_DOUBLE = 'd', SD_BUS_TYPE_STRING = 's', SD_BUS_TYPE_OBJEC...
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在对sdhci_s3c_driver进行注册的过程中,系统会根据sdhci_s3c_driver->driver.name成员变量(此处是“s3c-sdhci”)在platform_bus 总线上寻找同名字的platform_dvice(这个过程称之为“探测”),通过上面对s3c_device_hsmmc3的注册分析,发现s3c_device_mmc3.name也刚好是“s3c-sdhci”,所以他俩刚好可以配对,探测成功,...
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其中,request函数指针指向的函数用来处理host向从设备发送命令的请求, set_ios用来设置电源、时钟等等之类(需要重点关注), get_ro用来判断是否写保护 再来看该函数里面的中断注册部分 我们先看一下mmc_add_host这个函数,它的功能就是通过device_add函数将设备注册进linux设备模型,最终的结果就是在sys/bus/platform/de...
This information is used to cancel or track a bus request. SD_CARD_INTERFACE This structure stores information on the physical nature of an SD card and its interface. SD_CARD_INTERFACE_EX This structure stores information on the physical nature of an SD card and its interface. SD_CARD_...
.detect操作函数:驱动程序经常需要调用此函数去检测mmc卡的状态,具体实现是发送CMD13命令,并读回响应,如果响应错误,则依次调用.remove、detach_bus来移除卡及释放总线。 2 core的flow 内核启动时,首先执行core/core.c的mmc_init,注册mmc、sd总线,以及一个host class设备。接着执行card/block.c中mmc_blk_init(),...