Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 264 insertions, 0 deletions

diff --git a/drivers/usb/serial/console.c b/drivers/usb/serial/console.c
new file mode 100644
index 000000000000..167f8ec56131
--- /dev/null
+++ b/drivers/usb/serial/console.c
@@ -0,0 +1,264 @@
+/*
+ * USB Serial Console driver
+ *
+ * Copyright (C) 2001 - 2002 Greg Kroah-Hartman (greg@kroah.com)
+ *
+ *      This program is free software; you can redistribute it and/or
+ *      modify it under the terms of the GNU General Public License version
+ *      2 as published by the Free Software Foundation.
+ * 
+ * Thanks to Randy Dunlap for the original version of this code.
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/tty.h>
+#include <linux/console.h>
+#include <linux/usb.h>
+
+static int debug;
+
+#include "usb-serial.h"
+
+struct usbcons_info {
+        int                     magic;
+        int                     break_flag;
+        struct usb_serial_port  *port;
+};
+
+static struct usbcons_info usbcons_info;
+static struct console usbcons;
+
+/*
+ * ------------------------------------------------------------
+ * USB Serial console driver
+ *
+ * Much of the code here is copied from drivers/char/serial.c
+ * and implements a phony serial console in the same way that
+ * serial.c does so that in case some software queries it,
+ * it will get the same results.
+ *
+ * Things that are different from the way the serial port code
+ * does things, is that we call the lower level usb-serial
+ * driver code to initialize the device, and we set the initial
+ * console speeds based on the command line arguments.
+ * ------------------------------------------------------------
+ */
+
+
+/*
+ * The parsing of the command line works exactly like the
+ * serial.c code, except that the specifier is "ttyUSB" instead
+ * of "ttyS".
+ */
+static int __init usb_console_setup(struct console *co, char *options)
+{
+        struct usbcons_info *info = &usbcons_info;
+        int baud = 9600;
+        int bits = 8;
+        int parity = 'n';
+        int doflow = 0;
+        int cflag = CREAD | HUPCL | CLOCAL;
+        char *s;
+        struct usb_serial *serial;
+        struct usb_serial_port *port;
+        int retval = 0;
+        struct tty_struct *tty;
+        struct termios *termios;
+
+        dbg ("%s", __FUNCTION__);
+
+        if (options) {
+                baud = simple_strtoul(options, NULL, 10);
+                s = options;
+                while (*s >= '0' && *s <= '9')
+                        s++;
+                if (*s)
+                        parity = *s++;
+                if (*s)
+                        bits   = *s++ - '0';
+                if (*s)
+                        doflow = (*s++ == 'r');
+        }
+
+        /* build a cflag setting */
+        switch (baud) {
+                case 1200:
+                        cflag |= B1200;
+                        break;
+                case 2400:
+                        cflag |= B2400;
+                        break;
+                case 4800:
+                        cflag |= B4800;
+                        break;
+                case 19200:
+                        cflag |= B19200;
+                        break;
+                case 38400:
+                        cflag |= B38400;
+                        break;
+                case 57600:
+                        cflag |= B57600;
+                        break;
+                case 115200:
+                        cflag |= B115200;
+                        break;
+                case 9600:
+                default:
+                        cflag |= B9600;
+                        /*
+                         * Set this to a sane value to prevent a divide error
+                         */
+                        baud  = 9600;
+                        break;
+        }
+        switch (bits) {
+                case 7:
+                        cflag |= CS7;
+                        break;
+                default:
+                case 8:
+                        cflag |= CS8;
+                        break;
+        }
+        switch (parity) {
+                case 'o': case 'O':
+                        cflag |= PARODD;
+                        break;
+                case 'e': case 'E':
+                        cflag |= PARENB;
+                        break;
+        }
+        co->cflag = cflag;
+
+        /* grab the first serial port that happens to be connected */
+        serial = usb_serial_get_by_index(0);
+        if (serial == NULL) {
+                /* no device is connected yet, sorry :( */
+                err ("No USB device connected to ttyUSB0");
+                return -ENODEV;
+        }
+
+        port = serial->port[0];
+        port->tty = NULL;
+
+        info->port = port;
+         
+        ++port->open_count;
+        if (port->open_count == 1) {
+                /* only call the device specific open if this 
+                 * is the first time the port is opened */
+                if (serial->type->open)
+                        retval = serial->type->open(port, NULL);
+                else
+                        retval = usb_serial_generic_open(port, NULL);
+                if (retval)
+                        port->open_count = 0;
+        }
+
+        if (retval) {
+                err ("could not open USB console port");
+                return retval;
+        }
+
+        if (serial->type->set_termios) {
+                /* build up a fake tty structure so that the open call has something
+                 * to look at to get the cflag value */
+                tty = kmalloc (sizeof (*tty), GFP_KERNEL);
+                if (!tty) {
+                        err ("no more memory");
+                        return -ENOMEM;
+                }
+                termios = kmalloc (sizeof (*termios), GFP_KERNEL);
+                if (!termios) {
+                        err ("no more memory");
+                        kfree (tty);
+                        return -ENOMEM;
+                }
+                memset (tty, 0x00, sizeof(*tty));
+                memset (termios, 0x00, sizeof(*termios));
+                termios->c_cflag = cflag;
+                tty->termios = termios;
+                port->tty = tty;
+
+                /* set up the initial termios settings */
+                serial->type->set_termios(port, NULL);
+                port->tty = NULL;
+                kfree (termios);
+                kfree (tty);
+        }
+
+        return retval;
+}
+
+static void usb_console_write(struct console *co, const char *buf, unsigned count)
+{
+        static struct usbcons_info *info = &usbcons_info;
+        struct usb_serial_port *port = info->port;
+        struct usb_serial *serial;
+        int retval = -ENODEV;
+
+        if (!port)
+                return;
+        serial = port->serial;
+
+        if (count == 0)
+                return;
+
+        dbg("%s - port %d, %d byte(s)", __FUNCTION__, port->number, count);
+
+        if (!port->open_count) {
+                dbg ("%s - port not opened", __FUNCTION__);
+                goto exit;
+        }
+
+        /* pass on to the driver specific version of this function if it is available */
+        if (serial->type->write)
+                retval = serial->type->write(port, buf, count);
+        else
+                retval = usb_serial_generic_write(port, buf, count);
+
+exit:
+        dbg("%s - return value (if we had one): %d", __FUNCTION__, retval);
+}
+
+static struct console usbcons = {
+        .name =         "ttyUSB",
+        .write =        usb_console_write,
+        .setup =        usb_console_setup,
+        .flags =        CON_PRINTBUFFER,
+        .index =        -1,
+};
+
+void usb_serial_console_init (int serial_debug, int minor)
+{
+        debug = serial_debug;
+
+        if (minor == 0) {
+                /* 
+                 * Call register_console() if this is the first device plugged
+                 * in.  If we call it earlier, then the callback to
+                 * console_setup() will fail, as there is not a device seen by
+                 * the USB subsystem yet.
+                 */
+                /*
+                 * Register console.
+                 * NOTES:
+                 * console_setup() is called (back) immediately (from register_console).
+                 * console_write() is called immediately from register_console iff
+                 * CON_PRINTBUFFER is set in flags.
+                 */
+                dbg ("registering the USB serial console.");
+                register_console(&usbcons);
+        }
+}
+
+void usb_serial_console_exit (void)
+{
+        unregister_console(&usbcons);
+}
+