From fcc9d2e5a6c89d22b8b773a64fb4ad21ac318446 Mon Sep 17 00:00:00 2001
From: Jonathan Herman <hermanjl@cs.unc.edu>
Date: Tue, 22 Jan 2013 10:38:37 -0500
Subject: Added missing tegra files.
---
drivers/usb/serial/ezusb.c | 61 ++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 61 insertions(+)
create mode 100644 drivers/usb/serial/ezusb.c
(limited to 'drivers/usb/serial/ezusb.c')
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);
+
--
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