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:
+ */