1 files changed, 251 insertions, 0 deletions
diff --git a/arch/um/drivers/ssl.c b/arch/um/drivers/ssl.c
new file mode 100644
index 000000000000..c5839c3141f8
--- /dev/null
+++ b/arch/um/drivers/ssl.c
@@ -0,0 +1,251 @@
+/* 
+ * Copyright (C) 2000, 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#include "linux/config.h"
+#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 "line.h"
+#include "ssl.h"
+#include "chan_kern.h"
+#include "user_util.h"
+#include "kern_util.h"
+#include "kern.h"
+#include "init.h"
+#include "irq_user.h"
+#include "mconsole_kern.h"
+#include "2_5compat.h"
+
+static int ssl_version = 1;
+
+/* Referenced only by tty_driver below - presumably it's locked correctly
+ * by the tty driver.
+ */
+
+static struct tty_driver *ssl_driver;
+
+#define NR_PORTS 64
+
+void ssl_announce(char *dev_name, int dev)
+{
+	printk(KERN_INFO "Serial line %d assigned device '%s'\n", dev,
+	       dev_name);
+}
+
+static struct chan_opts opts = {
+	.announce 	= ssl_announce,
+	.xterm_title	= "Serial Line #%d",
+	.raw		= 1,
+	.tramp_stack 	= 0,
+	.in_kernel 	= 1,
+};
+
+static int ssl_config(char *str);
+static int ssl_get_config(char *dev, char *str, int size, char **error_out);
+static int ssl_remove(char *str);
+
+static struct line_driver driver = {
+	.name 			= "UML serial line",
+	.device_name 		= "ttyS",
+	.devfs_name 		= "tts/",
+	.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",
+	.symlink_from 		= "serial",
+	.symlink_to 		= "tts",
+	.mc  = {
+		.name  		= "ssl",
+		.config 	= ssl_config,
+		.get_config 	= ssl_get_config,
+		.remove 	= ssl_remove,
+	},
+};
+
+/* The array is initialized by line_init, which is an initcall.  The 
+ * individual elements are protected by individual semaphores.
+ */
+static struct line serial_lines[NR_PORTS] =
+	{ [0 ... NR_PORTS - 1] = LINE_INIT(CONFIG_SSL_CHAN, &driver) };
+
+static struct lines lines = LINES_INIT(NR_PORTS);
+
+static int ssl_config(char *str)
+{
+	return(line_config(serial_lines, 
+			   sizeof(serial_lines)/sizeof(serial_lines[0]), str));
+}
+
+static int ssl_get_config(char *dev, char *str, int size, char **error_out)
+{
+	return(line_get_config(dev, serial_lines, 
+			       sizeof(serial_lines)/sizeof(serial_lines[0]), 
+			       str, size, error_out));
+}
+
+static int ssl_remove(char *str)
+{
+	return(line_remove(serial_lines, 
+			   sizeof(serial_lines)/sizeof(serial_lines[0]), str));
+}
+
+int ssl_open(struct tty_struct *tty, struct file *filp)
+{
+	return line_open(serial_lines, tty, &opts);
+}
+
+#if 0
+static int ssl_chars_in_buffer(struct tty_struct *tty)
+{
+	return(0);
+}
+
+static void ssl_flush_buffer(struct tty_struct *tty)
+{
+	return;
+}
+
+static void ssl_throttle(struct tty_struct * tty)
+{
+	printk(KERN_ERR "Someone should implement ssl_throttle\n");
+}
+
+static void ssl_unthrottle(struct tty_struct * tty)
+{
+	printk(KERN_ERR "Someone should implement ssl_unthrottle\n");
+}
+
+static void ssl_stop(struct tty_struct *tty)
+{
+	printk(KERN_ERR "Someone should implement ssl_stop\n");
+}
+
+static void ssl_start(struct tty_struct *tty)
+{
+	printk(KERN_ERR "Someone should implement ssl_start\n");
+}
+
+void ssl_hangup(struct tty_struct *tty)
+{
+}
+#endif
+
+static struct tty_operations ssl_ops = {
+	.open 	 		= ssl_open,
+	.close 	 		= line_close,
+	.write 	 		= line_write,
+	.put_char 		= line_put_char,
+	.write_room		= line_write_room,
+	.chars_in_buffer 	= line_chars_in_buffer,
+	.set_termios 		= line_set_termios,
+	.ioctl 	 		= line_ioctl,
+#if 0
+	.flush_chars 		= ssl_flush_chars,
+	.flush_buffer 		= ssl_flush_buffer,
+	.throttle 		= ssl_throttle,
+	.unthrottle 		= ssl_unthrottle,
+	.stop 	 		= ssl_stop,
+	.start 	 		= ssl_start,
+	.hangup 	 	= ssl_hangup,
+#endif
+};
+
+/* 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];
+
+	down(&line->sem);
+	console_write_chan(&line->chan_list, string, len);
+	up(&line->sem);
+}
+
+static struct tty_driver *ssl_console_device(struct console *c, int *index)
+{
+	*index = c->index;
+	return ssl_driver;
+}
+
+static int ssl_console_setup(struct console *co, char *options)
+{
+	struct line *line = &serial_lines[co->index];
+
+	return console_open_chan(line,co,&opts);
+}
+
+static struct console ssl_cons = {
+	.name		= "ttyS",
+	.write		= ssl_console_write,
+	.device		= ssl_console_device,
+	.setup		= ssl_console_setup,
+	.flags		= CON_PRINTBUFFER,
+	.index		= -1,
+};
+
+int ssl_init(void)
+{
+	char *new_title;
+
+	printk(KERN_INFO "Initializing software serial port version %d\n", 
+	       ssl_version);
+	ssl_driver = line_register_devfs(&lines, &driver, &ssl_ops,
+					 serial_lines, ARRAY_SIZE(serial_lines));
+
+	lines_init(serial_lines, sizeof(serial_lines)/sizeof(serial_lines[0]));
+
+	new_title = add_xterm_umid(opts.xterm_title);
+	if (new_title != NULL)
+		opts.xterm_title = new_title;
+
+	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,
+		    sizeof(serial_lines)/sizeof(serial_lines[0]));
+}
+__uml_exitcall(ssl_exit);
+
+static int ssl_chan_setup(char *str)
+{
+	return(line_setup(serial_lines,
+			  sizeof(serial_lines)/sizeof(serial_lines[0]),
+			  str, 1));
+}
+
+__setup("ssl", ssl_chan_setup);
+__channel_help(ssl_chan_setup, "ssl");
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */