hwc_con.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:2k
- /*
- * drivers/s390/char/hwc_con.c
- * HWC line mode console driver
- *
- * S390 version
- * Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
- * Author(s): Martin Peschke <mpeschke@de.ibm.com>
- */
- #include <linux/config.h>
- #include <linux/kernel.h>
- #include <linux/major.h>
- #include <linux/errno.h>
- #include <linux/kdev_t.h>
- #include <linux/string.h>
- #include <linux/console.h>
- #include <linux/fs.h>
- #include <linux/init.h>
- #include "hwc_rw.h"
- #ifdef CONFIG_HWC_CONSOLE
- #define hwc_console_major 4
- #define hwc_console_minor 64
- #define hwc_console_name "console"
- void hwc_console_write (struct console *, const char *, unsigned int);
- kdev_t hwc_console_device (struct console *);
- void hwc_console_unblank (void);
- #define HWC_CON_PRINT_HEADER "hwc console driver: "
- struct console hwc_console = {
- name: hwc_console_name,
- write: hwc_console_write,
- device: hwc_console_device,
- unblank:hwc_console_unblank,
- flags: CON_PRINTBUFFER,
- };
- void
- hwc_console_write (
- struct console *console,
- const char *message,
- unsigned int count)
- {
- if (console->device (console) != hwc_console.device (&hwc_console)) {
- hwc_printk (KERN_WARNING HWC_CON_PRINT_HEADER
- "hwc_console_write() called with wrong "
- "device number");
- return;
- }
- hwc_write (0, message, count);
- }
- kdev_t
- hwc_console_device (struct console * c)
- {
- return MKDEV (hwc_console_major, hwc_console_minor);
- }
- void
- hwc_console_unblank (void)
- {
- hwc_unblank ();
- }
- #endif
- void __init
- hwc_console_init (void)
- {
- if (!MACHINE_HAS_HWC)
- return;
- if (hwc_init () == 0) {
- #ifdef CONFIG_HWC_CONSOLE
- if (CONSOLE_IS_HWC)
- register_console (&hwc_console);
- #endif
- } else
- panic (HWC_CON_PRINT_HEADER "hwc initialisation failed !");
- return;
- }