串口驅(qū)動程序

1、Driver for Samsung S3C6400 and S3C6410 SoC onboard UARTs.Copyright 2008 Openmoko, Inc.Copyright 2008 Simtec ElectronicsBen Dooks HYPERLINK http:/armlinux.simtec.co.uk/ http:/armlinux.simtec.co.uk/This program is free software; you can redistribute it and/or modifyit under the terms of the GNU Genera

2、l Public License version 2 aspublished by the Free Software Foundation.*/#include #include #include #include #include #include #include #include #include #include #include “Samsung.hstatic int s3c6400_serial_setsource(struct uart_port *port, struct s3c24xx_uart_clksrc *clk)(unsigned long ucon = rd_r

3、egl(port, S3C2410_UCON);if (strcmp (字符串函數(shù),比較兩個字符串的大小)(clk-name, “ucIkO”) = 0) ucon &= S3C6400_UCON_CLKMASK;ucon | = S3C6400_UCON_UCLK0; else if (strcmp(clk-name, uclkl) = 0)ucon | = S3C6400_UCON_UCLK1;else if (strcmp(clk-name, ,pclk,) = 0) (/* See notes about transitioning from UCLK to PCLK */ ucon

4、&= S3C6400_UCON_UCLK0; else (printk(KERN_ERR unknown clock source %sn, clk-name);return -EINVAL;wr_regl(port, S3C2410_UCON, ucon);return 0;static int s3c6400_serial_getsource(struct uart_port *port, struct s3c24xx_uart_clksrc *clk)(u32 ucon = rd_regl(port S3C2410_UCON);clk-divisor = 1;switch (ucon &

5、 S3C6400_UCON_CLKMASK) case S3C6400_UCON_UCLK0:clk-name = ucIkO;break;case S3C6400_UCON_UCLK1:clk-name = uclkl1;break;case S3C6400_UCON_PCLK:case S3C6400_UCON_PCLK2:clk-name = pclk”；break;return 0;static int s3c6400_serial_resetport(struct uart_port *port, struct s3c2410_uartcfg *cfg)(unsigned long

6、ucon = rd_regl(portz S3C2410_UCON);dbg(Hs3c6400_serial_resetport: port=%p (%08lx), cfg=%pn/ port, port-mapbase, cfg);/* ensure we dont change the clock settings. */ucon &= S3C6400_UCON_CLKMASK;wr_regl(port, S3C2410_UCON, ucon | cfg-ucon);wr_regl(port, S3C2410_ULCON, cfg-ulcon);/* reset both fifos */

7、wr_regl(port,S3C2410_UFCON, cfg-ufcon | S3C2410_UFCON_RESETBOTH);wr_regl(port, S3C2410_UFCON, cfg-ufcon);return 0;)static struct s3c24xx_uartjnfo s3c6400_uart_inf = .name= Samsung S3C6400 UART”，.type= PORT_S3C6400,.fifosize = 64,.rxjifomask= S3C2440_U FSTAT_RX M ASK,.rxjifoshift= S3C2440_U FSTAT_RXS

8、H I FT,.rxjifofull= S3C2440_UFSTAT_RXFULL,.txjifofull= S3C2440_UFSTAT_TXFULL,.txjifomask= S3C2440_UFSTAT_TXMASK,.txjifoshift= S3C2440_U FSTAT_TXSH I FT,get_clksrc= s3c6400_serial_getsource,.set_clksrc= s3c6400_serial_setsource,reset_port= s3c6400_serial_resetport,)； /* device management */static int

9、 s3c6400_serial_probe(struct platform_device *dev) (dbg(”s3c6400_serial_probe: dev=%pn,/ dev);return -s3c24xx_serial_probe(dev, &s3c6400_uart_inf);static struct platform_driver s3c6400_serial_drv = (.probe= s3c6400_serial_probe,.remove= s3c24xx_serial_remove,.driver= .name= s3c6400uart,.owner= THIS_

10、MODULE,， ）；s3c24xx_console_init(&s3c6400_serial_drv, &s3c6400_uart_inf);static int _init s3c6400_serial_init(void)(return s3c24xx_serial_init(&s3c6400_serial_drv, &s3c6400_uart_inf);static void _exit s3c6400_serial_exit(void)(platform_driver_unregister(&s3c6400_serial_drv);module Jnit(s3c6400_serialJnit);module_exit(s3c6400_serial_exit