[deliverable/linux.git] / arch / um / drivers / ssl.c

/* 
 * Copyright (C) 2000, 2002 Jeff Dike (jdike@karaya.com)
 * Licensed under the GPL
 */

#include <linux/fs.h>
#include <linux/tty.h>
#include <linux/tty_driver.h>
#include <linux/major.h>
#include <linux/mm.h>
#include <linux/init.h>
#include <linux/console.h>
#include <asm/termbits.h>
#include <asm/irq.h>
#include "ssl.h"
#include "chan.h"
#include <init.h>
#include <irq_user.h>
#include "mconsole_kern.h"

static const int ssl_version = 1;

#define NR_PORTS 64

static void ssl_announce(char *dev_name, int dev)
{
	printk(KERN_INFO "Serial line %d assigned device '%s'\n", dev,
	       dev_name);
}

/* Almost const, except that xterm_title may be changed in an initcall */
static struct chan_opts opts = {
	.announce 	= ssl_announce,
	.xterm_title	= "Serial Line #%d",
	.raw		= 1,
};

static int ssl_config(char *str, char **error_out);
static int ssl_get_config(char *dev, char *str, int size, char **error_out);
static int ssl_remove(int n, char **error_out);


/* Const, except for .mc.list */
static struct line_driver driver = {
	.name 			= "UML serial line",
	.device_name 		= "ttyS",
	.major 			= TTY_MAJOR,
	.minor_start 		= 64,
	.type 		 	= TTY_DRIVER_TYPE_SERIAL,
	.subtype 	 	= 0,
	.read_irq 		= SSL_IRQ,
	.read_irq_name 		= "ssl",
	.write_irq 		= SSL_WRITE_IRQ,
	.write_irq_name 	= "ssl-write",
	.mc  = {
		.list		= LIST_HEAD_INIT(driver.mc.list),
		.name  		= "ssl",
		.config 	= ssl_config,
		.get_config 	= ssl_get_config,
		.id		= line_id,
		.remove 	= ssl_remove,
	},
};

/* The array is initialized by line_init, at initcall time.  The
 * elements are locked individually as needed.
 */
static char *conf[NR_PORTS];
static char *def_conf = CONFIG_SSL_CHAN;
static struct line serial_lines[NR_PORTS];

static int ssl_config(char *str, char **error_out)
{
	return line_config(serial_lines, ARRAY_SIZE(serial_lines), str, &opts,
			   error_out);
}

static int ssl_get_config(char *dev, char *str, int size, char **error_out)
{
	return line_get_config(dev, serial_lines, ARRAY_SIZE(serial_lines), str,
			       size, error_out);
}

static int ssl_remove(int n, char **error_out)
{
	return line_remove(serial_lines, ARRAY_SIZE(serial_lines), n,
			   error_out);
}

static int ssl_install(struct tty_driver *driver, struct tty_struct *tty)
{
	return line_install(driver, tty, &serial_lines[tty->index]);
}

static const struct tty_operations ssl_ops = {
	.open 	 		= line_open,
	.close 	 		= line_close,
	.write 	 		= line_write,
	.put_char 		= line_put_char,
	.write_room		= line_write_room,
	.chars_in_buffer 	= line_chars_in_buffer,
	.flush_buffer 		= line_flush_buffer,
	.flush_chars 		= line_flush_chars,
	.set_termios 		= line_set_termios,
	.throttle 		= line_throttle,
	.unthrottle 		= line_unthrottle,
	.install		= ssl_install,
	.hangup			= line_hangup,
};

/* Changed by ssl_init and referenced by ssl_exit, which are both serialized
 * by being an initcall and exitcall, respectively.
 */
static int ssl_init_done = 0;

static void ssl_console_write(struct console *c, const char *string,
			      unsigned len)
{
	struct line *line = &serial_lines[c->index];
	unsigned long flags;

	spin_lock_irqsave(&line->lock, flags);
	console_write_chan(line->chan_out, string, len);
	spin_unlock_irqrestore(&line->lock, flags);
}

static struct tty_driver *ssl_console_device(struct console *c, int *index)
{
	*index = c->index;
	return driver.driver;
}

static int ssl_console_setup(struct console *co, char *options)
{
	struct line *line = &serial_lines[co->index];

	return console_open_chan(line, co);
}

/* No locking for register_console call - relies on single-threaded initcalls */
static struct console ssl_cons = {
	.name		= "ttyS",
	.write		= ssl_console_write,
	.device		= ssl_console_device,
	.setup		= ssl_console_setup,
	.flags		= CON_PRINTBUFFER|CON_ANYTIME,
	.index		= -1,
};

static int ssl_init(void)
{
	char *new_title;
	int err;
	int i;

	printk(KERN_INFO "Initializing software serial port version %d\n",
	       ssl_version);

	err = register_lines(&driver, &ssl_ops, serial_lines,
				    ARRAY_SIZE(serial_lines));
	if (err)
		return err;

	new_title = add_xterm_umid(opts.xterm_title);
	if (new_title != NULL)
		opts.xterm_title = new_title;

	for (i = 0; i < NR_PORTS; i++) {
		char *error;
		char *s = conf[i];
		if (!s)
			s = def_conf;
		if (setup_one_line(serial_lines, i, s, &opts, &error))
			printk(KERN_ERR "setup_one_line failed for "
			       "device %d : %s\n", i, error);
	}

	ssl_init_done = 1;
	register_console(&ssl_cons);
	return 0;
}
late_initcall(ssl_init);

static void ssl_exit(void)
{
	if (!ssl_init_done)
		return;
	close_lines(serial_lines, ARRAY_SIZE(serial_lines));
}
__uml_exitcall(ssl_exit);

static int ssl_chan_setup(char *str)
{
	line_setup(conf, NR_PORTS, &def_conf, str, "serial line");
	return 1;
}

__setup("ssl", ssl_chan_setup);
__channel_help(ssl_chan_setup, "ssl");
Commit	Line	Data
	1	/*
	2	* Copyright (C) 2000, 2002 Jeff Dike (jdike@karaya.com)
	3	* Licensed under the GPL
	4	*/
	5
	6	#include <linux/fs.h>
	7	#include <linux/tty.h>
	8	#include <linux/tty_driver.h>
	9	#include <linux/major.h>
	10	#include <linux/mm.h>
	11	#include <linux/init.h>
	12	#include <linux/console.h>
	13	#include <asm/termbits.h>
	14	#include <asm/irq.h>
	15	#include "ssl.h"
	16	#include "chan.h"
	17	#include <init.h>
	18	#include <irq_user.h>
	19	#include "mconsole_kern.h"
	20
	21	static const int ssl_version = 1;
	22
	23	#define NR_PORTS 64
	24
	25	static void ssl_announce(char *dev_name, int dev)
	26	{
	27	printk(KERN_INFO "Serial line %d assigned device '%s'\n", dev,
	28	dev_name);
	29	}
	30
	31	/* Almost const, except that xterm_title may be changed in an initcall */
	32	static struct chan_opts opts = {
	33	.announce = ssl_announce,
	34	.xterm_title = "Serial Line #%d",
	35	.raw = 1,
	36	};
	37
	38	static int ssl_config(char str, char *error_out);
	39	static int ssl_get_config(char dev, char str, int size, char **error_out);
	40	static int ssl_remove(int n, char **error_out);
	41
	42
	43	/* Const, except for .mc.list */
	44	static struct line_driver driver = {
	45	.name = "UML serial line",
	46	.device_name = "ttyS",
	47	.major = TTY_MAJOR,
	48	.minor_start = 64,
	49	.type = TTY_DRIVER_TYPE_SERIAL,
	50	.subtype = 0,
	51	.read_irq = SSL_IRQ,
	52	.read_irq_name = "ssl",
	53	.write_irq = SSL_WRITE_IRQ,
	54	.write_irq_name = "ssl-write",
	55	.mc = {
	56	.list = LIST_HEAD_INIT(driver.mc.list),
	57	.name = "ssl",
	58	.config = ssl_config,
	59	.get_config = ssl_get_config,
	60	.id = line_id,
	61	.remove = ssl_remove,
	62	},
	63	};
	64
	65	/* The array is initialized by line_init, at initcall time. The
	66	* elements are locked individually as needed.
	67	*/
	68	static char *conf[NR_PORTS];
	69	static char *def_conf = CONFIG_SSL_CHAN;
	70	static struct line serial_lines[NR_PORTS];
	71
	72	static int ssl_config(char str, char *error_out)
	73	{
	74	return line_config(serial_lines, ARRAY_SIZE(serial_lines), str, &opts,
	75	error_out);
	76	}
	77
	78	static int ssl_get_config(char dev, char str, int size, char **error_out)
	79	{
	80	return line_get_config(dev, serial_lines, ARRAY_SIZE(serial_lines), str,
	81	size, error_out);
	82	}
	83
	84	static int ssl_remove(int n, char **error_out)
	85	{
	86	return line_remove(serial_lines, ARRAY_SIZE(serial_lines), n,
	87	error_out);
	88	}
	89
	90	static int ssl_install(struct tty_driver driver, struct tty_struct tty)
	91	{
	92	return line_install(driver, tty, &serial_lines[tty->index]);
	93	}
	94
	95	static const struct tty_operations ssl_ops = {
	96	.open = line_open,
	97	.close = line_close,
	98	.write = line_write,
	99	.put_char = line_put_char,
	100	.write_room = line_write_room,
	101	.chars_in_buffer = line_chars_in_buffer,
	102	.flush_buffer = line_flush_buffer,
	103	.flush_chars = line_flush_chars,
	104	.set_termios = line_set_termios,
	105	.throttle = line_throttle,
	106	.unthrottle = line_unthrottle,
	107	.install = ssl_install,
	108	.hangup = line_hangup,
	109	};
	110
	111	/* Changed by ssl_init and referenced by ssl_exit, which are both serialized
	112	* by being an initcall and exitcall, respectively.
	113	*/
	114	static int ssl_init_done = 0;
	115
	116	static void ssl_console_write(struct console c, const char string,
	117	unsigned len)
	118	{
	119	struct line *line = &serial_lines[c->index];
	120	unsigned long flags;
	121
	122	spin_lock_irqsave(&line->lock, flags);
	123	console_write_chan(line->chan_out, string, len);
	124	spin_unlock_irqrestore(&line->lock, flags);
	125	}
	126
	127	static struct tty_driver ssl_console_device(struct console c, int *index)
	128	{
	129	*index = c->index;
	130	return driver.driver;
	131	}
	132
	133	static int ssl_console_setup(struct console co, char options)
	134	{
	135	struct line *line = &serial_lines[co->index];
	136
	137	return console_open_chan(line, co);
	138	}
	139
	140	/* No locking for register_console call - relies on single-threaded initcalls */
	141	static struct console ssl_cons = {
	142	.name = "ttyS",
	143	.write = ssl_console_write,
	144	.device = ssl_console_device,
	145	.setup = ssl_console_setup,
	146	.flags = CON_PRINTBUFFER\|CON_ANYTIME,
	147	.index = -1,
	148	};
	149
	150	static int ssl_init(void)
	151	{
	152	char *new_title;
	153	int err;
	154	int i;
	155
	156	printk(KERN_INFO "Initializing software serial port version %d\n",
	157	ssl_version);
	158
	159	err = register_lines(&driver, &ssl_ops, serial_lines,
	160	ARRAY_SIZE(serial_lines));
	161	if (err)
	162	return err;
	163
	164	new_title = add_xterm_umid(opts.xterm_title);
	165	if (new_title != NULL)
	166	opts.xterm_title = new_title;
	167
	168	for (i = 0; i < NR_PORTS; i++) {
	169	char *error;
	170	char *s = conf[i];
	171	if (!s)
	172	s = def_conf;
	173	if (setup_one_line(serial_lines, i, s, &opts, &error))
	174	printk(KERN_ERR "setup_one_line failed for "
	175	"device %d : %s\n", i, error);
	176	}
	177
	178	ssl_init_done = 1;
	179	register_console(&ssl_cons);
	180	return 0;
	181	}
	182	late_initcall(ssl_init);
	183
	184	static void ssl_exit(void)
	185	{
	186	if (!ssl_init_done)
	187	return;
	188	close_lines(serial_lines, ARRAY_SIZE(serial_lines));
	189	}
	190	__uml_exitcall(ssl_exit);
	191
	192	static int ssl_chan_setup(char *str)
	193	{
	194	line_setup(conf, NR_PORTS, &def_conf, str, "serial line");
	195	return 1;
	196	}
	197
	198	__setup("ssl", ssl_chan_setup);
	199	__channel_help(ssl_chan_setup, "ssl");