linux串口(serial、uart)驱动程序设计

《linux串口(serial、uart)驱动程序设计》由会员上传分享，免费在线阅读，更多相关内容在工程资料-天天文库。

1、Linux串口（serial、uart）驱动程序设计http://blog.chinaunix.net/space.php?uid二23089249&do二blog&id二34481一、核心数据结构串口驱动有3个核心数据结构，它们都定义在<#includclinux/scrial_corc.h>1、uart_driveruart_driver包含了串口设备名、串口驱动名、主次设备号、串口控制台（可选）等信息，还封装了tty_driver（底层串口驱动无需关心tty_driver）ostructuart

2、_driver{structmodule*owner;/*拥有该uart_driver的模块,一般为THIS_MODULE*/constchar*driver_name;/*屮丨I驱动名，串口设备文件名以驱动名为皋础*/constchar*dev_name;/*串口设备名*/intmajor;/*主设备号*/intminor;/*次设备号*/intnr;/*该uart_driver支持的串口个数（最大）*/structconsole*cons;/*其杲寸应的console.若该uart_driver支

3、持serialconsole,否则为NULL*//**theseareprivate;thelowleveldrivershouldnot*touchthese;theyshouldbeinitialisedtoNULL*/structuart_state*state;structtty_driver*tty_driver;}；2、uart_portuart_port用丁•描述串口端口的1/0端口或1/0内存地址、FIFO大小、端口类型、串口血钟等信息。实际上，一个uart_port实例对应一个串口设

4、备struetuartport{spinlock_tlock;/*串口端口锁*/unsignedintiobase;/*10端口基地址*/unsignedchar_iomem*membase;*1()内吐地」二,纟仝映讨(如iox'iii"]))后的10内存虚拟基地址*/unsignedintirq;/*中断号*/unsignedintuartclk;/*串口时钟*/unsignedintfifosize;*串丨丨FIFO缓冲大小*/unsignedcharx_char;/*xon/xoff字符*/u

5、nsignedcharregshift:/*寄存器位移*/unsignedchariotype;/*10访问方式*/unsignedcharunusedl;ttdefineLPIO_PORT(0)/*10端口*/ttdefineUPI0_HUB6(1)ttdefineUPIOMEM(2)/*10内存*/^defineUPI0_MEM32(3)^defineUPTO_AU(4)/*Au1x00type10*/ttdefineUPI0_TSI(5)/*Tsil08/109type10*/ttdefineU

6、PIO_DWAPB(6)/*DesignWareAPBUART*/ttdefineUPIORM9000(7)/*RM9000type10*/unsignedintread_status_mask;*关心的Rxerrorsteitus*unsignedintignore_status_mask;/*忽略的Rxerrorstatus*/structuart_info*info;，*pointertoparentinfo*,，struetuarticounticount;/*计数器*/structconso

7、le*cons;*consol纟人构体*ttifdefCONFIG_SERIAL_CORE_CONSOLEunsignedlongsysrq;*sysrqtimeout*/#endifupf_tflags;ttdefineLPF_FOURPORT((_forceupf_t)(1«1))ttdefineUPFSAK((_forceupft)(1«2))ttdefineUPFSPDMASK((forceupft)(0x1030))#defineUPF^SPDJII((_forceupf_t)(0x0010

8、))^defineUPF_SPD_VHI((_forceupf_t)(0x0020))ttdefineUPF_SPD_CUST((_forceupf_t)(0x0030))ttdefineUPF_SPD_SHI((「forceupf_t)(0x1000))ttdefineUPFSPDWARP((forceupft)(0x1010))ttdefineUPF_SKIP_TEST((_forceupf_t)(1«6))ttdefineUPF_AUTO_IRQ(