1dbddf429SAlex Dewar // SPDX-License-Identifier: GPL-2.0
21da177e4SLinus Torvalds /*
31da177e4SLinus Torvalds * Copyright (C) 2000, 2001 Jeff Dike (jdike@karaya.com)
41da177e4SLinus Torvalds */
51da177e4SLinus Torvalds
637185b33SAl Viro #include <linux/posix_types.h>
737185b33SAl Viro #include <linux/tty.h>
837185b33SAl Viro #include <linux/tty_flip.h>
937185b33SAl Viro #include <linux/types.h>
1037185b33SAl Viro #include <linux/major.h>
1137185b33SAl Viro #include <linux/kdev_t.h>
1237185b33SAl Viro #include <linux/console.h>
1337185b33SAl Viro #include <linux/string.h>
1437185b33SAl Viro #include <linux/sched.h>
1537185b33SAl Viro #include <linux/list.h>
1637185b33SAl Viro #include <linux/init.h>
1737185b33SAl Viro #include <linux/interrupt.h>
1837185b33SAl Viro #include <linux/slab.h>
1937185b33SAl Viro #include <linux/hardirq.h>
2037185b33SAl Viro #include <asm/current.h>
2137185b33SAl Viro #include <asm/irq.h>
221da177e4SLinus Torvalds #include "stdio_console.h"
23510c72a3SAl Viro #include "chan.h"
2437185b33SAl Viro #include <irq_user.h>
251da177e4SLinus Torvalds #include "mconsole_kern.h"
2637185b33SAl Viro #include <init.h>
271da177e4SLinus Torvalds
281da177e4SLinus Torvalds #define MAX_TTYS (16)
291da177e4SLinus Torvalds
stdio_announce(char * dev_name,int dev)30074a0db8SWANG Cong static void stdio_announce(char *dev_name, int dev)
311da177e4SLinus Torvalds {
321da177e4SLinus Torvalds printk(KERN_INFO "Virtual console %d assigned device '%s'\n", dev,
331da177e4SLinus Torvalds dev_name);
341da177e4SLinus Torvalds }
351da177e4SLinus Torvalds
36a52f362fSJeff Dike /* Almost const, except that xterm_title may be changed in an initcall */
371da177e4SLinus Torvalds static struct chan_opts opts = {
381da177e4SLinus Torvalds .announce = stdio_announce,
391da177e4SLinus Torvalds .xterm_title = "Virtual Console #%d",
401da177e4SLinus Torvalds .raw = 1,
411da177e4SLinus Torvalds };
421da177e4SLinus Torvalds
43f28169d2SJeff Dike static int con_config(char *str, char **error_out);
441da177e4SLinus Torvalds static int con_get_config(char *dev, char *str, int size, char **error_out);
45f28169d2SJeff Dike static int con_remove(int n, char **con_remove);
461da177e4SLinus Torvalds
47d5c9ffc6SJeff Dike
48d5c9ffc6SJeff Dike /* Const, except for .mc.list */
491da177e4SLinus Torvalds static struct line_driver driver = {
501da177e4SLinus Torvalds .name = "UML console",
511da177e4SLinus Torvalds .device_name = "tty",
521da177e4SLinus Torvalds .major = TTY_MAJOR,
531da177e4SLinus Torvalds .minor_start = 0,
541da177e4SLinus Torvalds .type = TTY_DRIVER_TYPE_CONSOLE,
551da177e4SLinus Torvalds .subtype = SYSTEM_TYPE_CONSOLE,
561da177e4SLinus Torvalds .read_irq_name = "console",
571da177e4SLinus Torvalds .write_irq_name = "console-write",
581da177e4SLinus Torvalds .mc = {
59c0961c18SJeff Dike .list = LIST_HEAD_INIT(driver.mc.list),
601da177e4SLinus Torvalds .name = "con",
611da177e4SLinus Torvalds .config = con_config,
621da177e4SLinus Torvalds .get_config = con_get_config,
6329d56cfeSJeff Dike .id = line_id,
641da177e4SLinus Torvalds .remove = con_remove,
651da177e4SLinus Torvalds },
661da177e4SLinus Torvalds };
671da177e4SLinus Torvalds
68d5c9ffc6SJeff Dike /* The array is initialized by line_init, at initcall time. The
69d5c9ffc6SJeff Dike * elements are locked individually as needed.
701da177e4SLinus Torvalds */
7143574c1aSAl Viro static char *vt_conf[MAX_TTYS];
7243574c1aSAl Viro static char *def_conf;
7343574c1aSAl Viro static struct line vts[MAX_TTYS];
741da177e4SLinus Torvalds
con_config(char * str,char ** error_out)75f28169d2SJeff Dike static int con_config(char *str, char **error_out)
761da177e4SLinus Torvalds {
77f28169d2SJeff Dike return line_config(vts, ARRAY_SIZE(vts), str, &opts, error_out);
781da177e4SLinus Torvalds }
791da177e4SLinus Torvalds
con_get_config(char * dev,char * str,int size,char ** error_out)801da177e4SLinus Torvalds static int con_get_config(char *dev, char *str, int size, char **error_out)
811da177e4SLinus Torvalds {
820834cc77SJeff Dike return line_get_config(dev, vts, ARRAY_SIZE(vts), str, size, error_out);
831da177e4SLinus Torvalds }
841da177e4SLinus Torvalds
con_remove(int n,char ** error_out)85f28169d2SJeff Dike static int con_remove(int n, char **error_out)
861da177e4SLinus Torvalds {
87f28169d2SJeff Dike return line_remove(vts, ARRAY_SIZE(vts), n, error_out);
881da177e4SLinus Torvalds }
891da177e4SLinus Torvalds
90730760e9SJeff Dike /* Set in an initcall, checked in an exitcall */
91*4dc5a328SXin Gao static int con_init_done;
921da177e4SLinus Torvalds
con_install(struct tty_driver * driver,struct tty_struct * tty)9379e0273dSRichard Weinberger static int con_install(struct tty_driver *driver, struct tty_struct *tty)
9479e0273dSRichard Weinberger {
9579e0273dSRichard Weinberger return line_install(driver, tty, &vts[tty->index]);
9679e0273dSRichard Weinberger }
9779e0273dSRichard Weinberger
985e7672ecSJeff Dike static const struct tty_operations console_ops = {
9979e0273dSRichard Weinberger .open = line_open,
10079e0273dSRichard Weinberger .install = con_install,
1011da177e4SLinus Torvalds .close = line_close,
1021da177e4SLinus Torvalds .write = line_write,
1031da177e4SLinus Torvalds .write_room = line_write_room,
1041da177e4SLinus Torvalds .chars_in_buffer = line_chars_in_buffer,
105b97b77ccSPaolo 'Blaisorblade' Giarrusso .flush_buffer = line_flush_buffer,
106b97b77ccSPaolo 'Blaisorblade' Giarrusso .flush_chars = line_flush_chars,
107e4dcee80SJeff Dike .throttle = line_throttle,
108e4dcee80SJeff Dike .unthrottle = line_unthrottle,
10979e0273dSRichard Weinberger .hangup = line_hangup,
1101da177e4SLinus Torvalds };
1111da177e4SLinus Torvalds
uml_console_write(struct console * console,const char * string,unsigned len)1121da177e4SLinus Torvalds static void uml_console_write(struct console *console, const char *string,
1131da177e4SLinus Torvalds unsigned len)
1141da177e4SLinus Torvalds {
1151da177e4SLinus Torvalds struct line *line = &vts[console->index];
116b97b77ccSPaolo 'Blaisorblade' Giarrusso unsigned long flags;
1171da177e4SLinus Torvalds
118b97b77ccSPaolo 'Blaisorblade' Giarrusso spin_lock_irqsave(&line->lock, flags);
119bed5e39cSAl Viro console_write_chan(line->chan_out, string, len);
120b97b77ccSPaolo 'Blaisorblade' Giarrusso spin_unlock_irqrestore(&line->lock, flags);
1211da177e4SLinus Torvalds }
1221da177e4SLinus Torvalds
uml_console_device(struct console * c,int * index)1231da177e4SLinus Torvalds static struct tty_driver *uml_console_device(struct console *c, int *index)
1241da177e4SLinus Torvalds {
1251da177e4SLinus Torvalds *index = c->index;
126cfe6b7c7SAl Viro return driver.driver;
1271da177e4SLinus Torvalds }
1281da177e4SLinus Torvalds
uml_console_setup(struct console * co,char * options)1291da177e4SLinus Torvalds static int uml_console_setup(struct console *co, char *options)
1301da177e4SLinus Torvalds {
1311da177e4SLinus Torvalds struct line *line = &vts[co->index];
1321da177e4SLinus Torvalds
133a52f362fSJeff Dike return console_open_chan(line, co);
1341da177e4SLinus Torvalds }
1351da177e4SLinus Torvalds
136d5c9ffc6SJeff Dike /* No locking for register_console call - relies on single-threaded initcalls */
1371da177e4SLinus Torvalds static struct console stdiocons = {
1381da177e4SLinus Torvalds .name = "tty",
1391da177e4SLinus Torvalds .write = uml_console_write,
1401da177e4SLinus Torvalds .device = uml_console_device,
1411da177e4SLinus Torvalds .setup = uml_console_setup,
142b5337885SPaolo 'Blaisorblade' Giarrusso .flags = CON_PRINTBUFFER|CON_ANYTIME,
1431da177e4SLinus Torvalds .index = -1,
1441da177e4SLinus Torvalds };
1451da177e4SLinus Torvalds
stdio_init(void)146074a0db8SWANG Cong static int stdio_init(void)
1471da177e4SLinus Torvalds {
1481da177e4SLinus Torvalds char *new_title;
149cfe6b7c7SAl Viro int err;
15043574c1aSAl Viro int i;
1511da177e4SLinus Torvalds
152cfe6b7c7SAl Viro err = register_lines(&driver, &console_ops, vts,
1531da177e4SLinus Torvalds ARRAY_SIZE(vts));
154cfe6b7c7SAl Viro if (err)
155cfe6b7c7SAl Viro return err;
15604292b2cSAl Viro
1571da177e4SLinus Torvalds printk(KERN_INFO "Initialized stdio console driver\n");
1581da177e4SLinus Torvalds
1591da177e4SLinus Torvalds new_title = add_xterm_umid(opts.xterm_title);
1601da177e4SLinus Torvalds if(new_title != NULL)
1611da177e4SLinus Torvalds opts.xterm_title = new_title;
1621da177e4SLinus Torvalds
16304292b2cSAl Viro for (i = 0; i < MAX_TTYS; i++) {
16404292b2cSAl Viro char *error;
16504292b2cSAl Viro char *s = vt_conf[i];
16604292b2cSAl Viro if (!s)
16704292b2cSAl Viro s = def_conf;
16804292b2cSAl Viro if (!s)
16904292b2cSAl Viro s = i ? CONFIG_CON_CHAN : CONFIG_CON_ZERO_CHAN;
17004292b2cSAl Viro if (setup_one_line(vts, i, s, &opts, &error))
17104292b2cSAl Viro printk(KERN_ERR "setup_one_line failed for "
17204292b2cSAl Viro "device %d : %s\n", i, error);
17304292b2cSAl Viro }
17457ac895aSDavide Brini
1751da177e4SLinus Torvalds con_init_done = 1;
1761da177e4SLinus Torvalds register_console(&stdiocons);
177d50084a2SJeff Dike return 0;
1781da177e4SLinus Torvalds }
1791da177e4SLinus Torvalds late_initcall(stdio_init);
1801da177e4SLinus Torvalds
console_exit(void)1811da177e4SLinus Torvalds static void console_exit(void)
1821da177e4SLinus Torvalds {
1831da177e4SLinus Torvalds if (!con_init_done)
1841da177e4SLinus Torvalds return;
1850834cc77SJeff Dike close_lines(vts, ARRAY_SIZE(vts));
1861da177e4SLinus Torvalds }
1871da177e4SLinus Torvalds __uml_exitcall(console_exit);
1881da177e4SLinus Torvalds
console_chan_setup(char * str)1891da177e4SLinus Torvalds static int console_chan_setup(char *str)
1901da177e4SLinus Torvalds {
191745a600cSMasami Hiramatsu if (!strncmp(str, "sole=", 5)) /* console= option specifies tty */
192745a600cSMasami Hiramatsu return 0;
193745a600cSMasami Hiramatsu
19443574c1aSAl Viro line_setup(vt_conf, MAX_TTYS, &def_conf, str, "console");
195f28169d2SJeff Dike return 1;
1961da177e4SLinus Torvalds }
1971da177e4SLinus Torvalds __setup("con", console_chan_setup);
1981da177e4SLinus Torvalds __channel_help(console_chan_setup, "con");
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