Added missing tegra files.HEADmaster

1 files changed, 61 insertions, 0 deletions

diff --git a/drivers/usb/serial/ezusb.c b/drivers/usb/serial/ezusb.c
new file mode 100644
index 00000000000..3cfc762f505
--- /dev/null
+++ b/drivers/usb/serial/ezusb.c
@@ -0,0 +1,61 @@
+/*
+ * EZ-USB specific functions used by some of the USB to Serial drivers.
+ *
+ * Copyright (C) 1999 - 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.
+ */
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/tty.h>
+#include <linux/module.h>
+#include <linux/usb.h>
+#include <linux/usb/serial.h>
+
+/* EZ-USB Control and Status Register.  Bit 0 controls 8051 reset */
+#define CPUCS_REG    0x7F92
+
+int ezusb_writememory(struct usb_serial *serial, int address,
+                                unsigned char *data, int length, __u8 request)
+{
+        int result;
+        unsigned char *transfer_buffer;
+
+        /* dbg("ezusb_writememory %x, %d", address, length); */
+        if (!serial->dev) {
+                printk(KERN_ERR "ezusb: %s - no physical device present, "
+                       "failing.\n", __func__);
+                return -ENODEV;
+        }
+
+        transfer_buffer = kmemdup(data, length, GFP_KERNEL);
+        if (!transfer_buffer) {
+                dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n",
+                                                        __func__, length);
+                return -ENOMEM;
+        }
+        result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
+                     request, 0x40, address, 0, transfer_buffer, length, 3000);
+        kfree(transfer_buffer);
+        return result;
+}
+EXPORT_SYMBOL_GPL(ezusb_writememory);
+
+int ezusb_set_reset(struct usb_serial *serial, unsigned char reset_bit)
+{
+        int response;
+
+        /* dbg("%s - %d", __func__, reset_bit); */
+        response = ezusb_writememory(serial, CPUCS_REG, &reset_bit, 1, 0xa0);
+        if (response < 0)
+                dev_err(&serial->dev->dev, "%s- %d failed\n",
+                                                __func__, reset_bit);
+        return response;
+}
+EXPORT_SYMBOL_GPL(ezusb_set_reset);
+