zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/drivers/usb/serial/metro-usb.c b/ap/os/linux/linux-3.4.x/drivers/usb/serial/metro-usb.c
new file mode 100644
index 0000000..7c14671
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/usb/serial/metro-usb.c
@@ -0,0 +1,394 @@
+/*
+ Some of this code is credited to Linux USB open source files that are
+ distributed with Linux.
+
+ Copyright: 2007 Metrologic Instruments. All rights reserved.
+ Copyright: 2011 Azimut Ltd. <http://azimutrzn.ru/>
+*/
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/tty.h>
+#include <linux/module.h>
+#include <linux/usb.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/tty_driver.h>
+#include <linux/tty_flip.h>
+#include <linux/moduleparam.h>
+#include <linux/spinlock.h>
+#include <linux/errno.h>
+#include <linux/uaccess.h>
+#include <linux/usb/serial.h>
+
+/* Version Information */
+#define DRIVER_VERSION "v1.2.0.0"
+#define DRIVER_DESC "Metrologic Instruments Inc. - USB-POS driver"
+
+/* Product information. */
+#define FOCUS_VENDOR_ID 0x0C2E
+#define FOCUS_PRODUCT_ID_BI 0x0720
+#define FOCUS_PRODUCT_ID_UNI 0x0700
+
+#define METROUSB_SET_REQUEST_TYPE 0x40
+#define METROUSB_SET_MODEM_CTRL_REQUEST 10
+#define METROUSB_SET_BREAK_REQUEST 0x40
+#define METROUSB_MCR_NONE 0x08 /* Deactivate DTR and RTS. */
+#define METROUSB_MCR_RTS 0x0a /* Activate RTS. */
+#define METROUSB_MCR_DTR 0x09 /* Activate DTR. */
+#define WDR_TIMEOUT 5000 /* default urb timeout. */
+
+/* Private data structure. */
+struct metrousb_private {
+ spinlock_t lock;
+ int throttled;
+ unsigned long control_state;
+};
+
+/* Device table list. */
+static struct usb_device_id id_table[] = {
+ { USB_DEVICE(FOCUS_VENDOR_ID, FOCUS_PRODUCT_ID_BI) },
+ { USB_DEVICE(FOCUS_VENDOR_ID, FOCUS_PRODUCT_ID_UNI) },
+ { }, /* Terminating entry. */
+};
+MODULE_DEVICE_TABLE(usb, id_table);
+
+/* Input parameter constants. */
+static bool debug;
+
+static void metrousb_read_int_callback(struct urb *urb)
+{
+ struct usb_serial_port *port = urb->context;
+ struct metrousb_private *metro_priv = usb_get_serial_port_data(port);
+ struct tty_struct *tty;
+ unsigned char *data = urb->transfer_buffer;
+ int throttled = 0;
+ int result = 0;
+ unsigned long flags = 0;
+
+ dev_dbg(&port->dev, "%s\n", __func__);
+
+ switch (urb->status) {
+ case 0:
+ /* Success status, read from the port. */
+ break;
+ case -ECONNRESET:
+ case -ENOENT:
+ case -ESHUTDOWN:
+ /* urb has been terminated. */
+ dev_dbg(&port->dev,
+ "%s - urb shutting down, error code=%d\n",
+ __func__, result);
+ return;
+ default:
+ dev_dbg(&port->dev,
+ "%s - non-zero urb received, error code=%d\n",
+ __func__, result);
+ goto exit;
+ }
+
+
+ /* Set the data read from the usb port into the serial port buffer. */
+ tty = tty_port_tty_get(&port->port);
+ if (!tty) {
+ dev_dbg(&port->dev, "%s - bad tty pointer - exiting\n",
+ __func__);
+ return;
+ }
+
+ if (tty && urb->actual_length) {
+ /* Loop through the data copying each byte to the tty layer. */
+ tty_insert_flip_string(tty, data, urb->actual_length);
+
+ /* Force the data to the tty layer. */
+ tty_flip_buffer_push(tty);
+ }
+ tty_kref_put(tty);
+
+ /* Set any port variables. */
+ spin_lock_irqsave(&metro_priv->lock, flags);
+ throttled = metro_priv->throttled;
+ spin_unlock_irqrestore(&metro_priv->lock, flags);
+
+ /* Continue trying to read if set. */
+ if (!throttled) {
+ usb_fill_int_urb(port->interrupt_in_urb, port->serial->dev,
+ usb_rcvintpipe(port->serial->dev, port->interrupt_in_endpointAddress),
+ port->interrupt_in_urb->transfer_buffer,
+ port->interrupt_in_urb->transfer_buffer_length,
+ metrousb_read_int_callback, port, 1);
+
+ result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC);
+
+ if (result)
+ dev_dbg(&port->dev,
+ "%s - failed submitting interrupt in urb, error code=%d\n",
+ __func__, result);
+ }
+ return;
+
+exit:
+ /* Try to resubmit the urb. */
+ result = usb_submit_urb(urb, GFP_ATOMIC);
+ if (result)
+ dev_dbg(&port->dev,
+ "%s - failed submitting interrupt in urb, error code=%d\n",
+ __func__, result);
+}
+
+static void metrousb_cleanup(struct usb_serial_port *port)
+{
+ dev_dbg(&port->dev, "%s\n", __func__);
+
+ if (port->serial->dev) {
+ /* Shutdown any interrupt in urbs. */
+ if (port->interrupt_in_urb) {
+ usb_unlink_urb(port->interrupt_in_urb);
+ usb_kill_urb(port->interrupt_in_urb);
+ }
+ }
+}
+
+static int metrousb_open(struct tty_struct *tty, struct usb_serial_port *port)
+{
+ struct usb_serial *serial = port->serial;
+ struct metrousb_private *metro_priv = usb_get_serial_port_data(port);
+ unsigned long flags = 0;
+ int result = 0;
+
+ dev_dbg(&port->dev, "%s\n", __func__);
+
+ /* Make sure the urb is initialized. */
+ if (!port->interrupt_in_urb) {
+ dev_dbg(&port->dev, "%s - interrupt urb not initialized\n",
+ __func__);
+ return -ENODEV;
+ }
+
+ /* Set the private data information for the port. */
+ spin_lock_irqsave(&metro_priv->lock, flags);
+ metro_priv->control_state = 0;
+ metro_priv->throttled = 0;
+ spin_unlock_irqrestore(&metro_priv->lock, flags);
+
+ /* Clear the urb pipe. */
+ usb_clear_halt(serial->dev, port->interrupt_in_urb->pipe);
+
+ /* Start reading from the device */
+ usb_fill_int_urb(port->interrupt_in_urb, serial->dev,
+ usb_rcvintpipe(serial->dev, port->interrupt_in_endpointAddress),
+ port->interrupt_in_urb->transfer_buffer,
+ port->interrupt_in_urb->transfer_buffer_length,
+ metrousb_read_int_callback, port, 1);
+ result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
+
+ if (result) {
+ dev_dbg(&port->dev,
+ "%s - failed submitting interrupt in urb, error code=%d\n",
+ __func__, result);
+ goto exit;
+ }
+
+ dev_dbg(&port->dev, "%s - port open\n", __func__);
+exit:
+ return result;
+}
+
+static int metrousb_set_modem_ctrl(struct usb_serial *serial, unsigned int control_state)
+{
+ int retval = 0;
+ unsigned char mcr = METROUSB_MCR_NONE;
+
+ dev_dbg(&serial->dev->dev, "%s - control state = %d\n",
+ __func__, control_state);
+
+ /* Set the modem control value. */
+ if (control_state & TIOCM_DTR)
+ mcr |= METROUSB_MCR_DTR;
+ if (control_state & TIOCM_RTS)
+ mcr |= METROUSB_MCR_RTS;
+
+ /* Send the command to the usb port. */
+ retval = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
+ METROUSB_SET_REQUEST_TYPE, METROUSB_SET_MODEM_CTRL_REQUEST,
+ control_state, 0, NULL, 0, WDR_TIMEOUT);
+ if (retval < 0)
+ dev_dbg(&serial->dev->dev,
+ "%s - set modem ctrl=0x%x failed, error code=%d\n",
+ __func__, mcr, retval);
+
+ return retval;
+}
+
+static void metrousb_shutdown(struct usb_serial *serial)
+{
+ int i = 0;
+
+ dev_dbg(&serial->dev->dev, "%s\n", __func__);
+
+ /* Stop reading and writing on all ports. */
+ for (i = 0; i < serial->num_ports; ++i) {
+ /* Close any open urbs. */
+ metrousb_cleanup(serial->port[i]);
+
+ /* Free memory. */
+ kfree(usb_get_serial_port_data(serial->port[i]));
+ usb_set_serial_port_data(serial->port[i], NULL);
+
+ dev_dbg(&serial->dev->dev, "%s - freed port number=%d\n",
+ __func__, serial->port[i]->number);
+ }
+}
+
+static int metrousb_startup(struct usb_serial *serial)
+{
+ struct metrousb_private *metro_priv;
+ struct usb_serial_port *port;
+ int i = 0;
+
+ dev_dbg(&serial->dev->dev, "%s\n", __func__);
+
+ /* Loop through the serial ports setting up the private structures.
+ * Currently we only use one port. */
+ for (i = 0; i < serial->num_ports; ++i) {
+ port = serial->port[i];
+
+ /* Declare memory. */
+ metro_priv = kzalloc(sizeof(struct metrousb_private), GFP_KERNEL);
+ if (!metro_priv)
+ return -ENOMEM;
+
+ /* Initialize memory. */
+ spin_lock_init(&metro_priv->lock);
+ usb_set_serial_port_data(port, metro_priv);
+
+ dev_dbg(&serial->dev->dev, "%s - port number=%d\n ",
+ __func__, port->number);
+ }
+
+ return 0;
+}
+
+static void metrousb_throttle(struct tty_struct *tty)
+{
+ struct usb_serial_port *port = tty->driver_data;
+ struct metrousb_private *metro_priv = usb_get_serial_port_data(port);
+ unsigned long flags = 0;
+
+ dev_dbg(tty->dev, "%s\n", __func__);
+
+ /* Set the private information for the port to stop reading data. */
+ spin_lock_irqsave(&metro_priv->lock, flags);
+ metro_priv->throttled = 1;
+ spin_unlock_irqrestore(&metro_priv->lock, flags);
+}
+
+static int metrousb_tiocmget(struct tty_struct *tty)
+{
+ unsigned long control_state = 0;
+ struct usb_serial_port *port = tty->driver_data;
+ struct metrousb_private *metro_priv = usb_get_serial_port_data(port);
+ unsigned long flags = 0;
+
+ dev_dbg(tty->dev, "%s\n", __func__);
+
+ spin_lock_irqsave(&metro_priv->lock, flags);
+ control_state = metro_priv->control_state;
+ spin_unlock_irqrestore(&metro_priv->lock, flags);
+
+ return control_state;
+}
+
+static int metrousb_tiocmset(struct tty_struct *tty,
+ unsigned int set, unsigned int clear)
+{
+ struct usb_serial_port *port = tty->driver_data;
+ struct usb_serial *serial = port->serial;
+ struct metrousb_private *metro_priv = usb_get_serial_port_data(port);
+ unsigned long flags = 0;
+ unsigned long control_state = 0;
+
+ dev_dbg(tty->dev, "%s - set=%d, clear=%d\n", __func__, set, clear);
+
+ spin_lock_irqsave(&metro_priv->lock, flags);
+ control_state = metro_priv->control_state;
+
+ /* Set the RTS and DTR values. */
+ if (set & TIOCM_RTS)
+ control_state |= TIOCM_RTS;
+ if (set & TIOCM_DTR)
+ control_state |= TIOCM_DTR;
+ if (clear & TIOCM_RTS)
+ control_state &= ~TIOCM_RTS;
+ if (clear & TIOCM_DTR)
+ control_state &= ~TIOCM_DTR;
+
+ metro_priv->control_state = control_state;
+ spin_unlock_irqrestore(&metro_priv->lock, flags);
+ return metrousb_set_modem_ctrl(serial, control_state);
+}
+
+static void metrousb_unthrottle(struct tty_struct *tty)
+{
+ struct usb_serial_port *port = tty->driver_data;
+ struct metrousb_private *metro_priv = usb_get_serial_port_data(port);
+ unsigned long flags = 0;
+ int result = 0;
+
+ dev_dbg(tty->dev, "%s\n", __func__);
+
+ /* Set the private information for the port to resume reading data. */
+ spin_lock_irqsave(&metro_priv->lock, flags);
+ metro_priv->throttled = 0;
+ spin_unlock_irqrestore(&metro_priv->lock, flags);
+
+ /* Submit the urb to read from the port. */
+ port->interrupt_in_urb->dev = port->serial->dev;
+ result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC);
+ if (result)
+ dev_dbg(tty->dev,
+ "failed submitting interrupt in urb error code=%d\n",
+ result);
+}
+
+static struct usb_driver metrousb_driver = {
+ .name = "metro-usb",
+ .probe = usb_serial_probe,
+ .disconnect = usb_serial_disconnect,
+ .id_table = id_table
+};
+
+static struct usb_serial_driver metrousb_device = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "metro-usb",
+ },
+ .description = "Metrologic USB to serial converter.",
+ .id_table = id_table,
+ .num_ports = 1,
+ .open = metrousb_open,
+ .close = metrousb_cleanup,
+ .read_int_callback = metrousb_read_int_callback,
+ .attach = metrousb_startup,
+ .release = metrousb_shutdown,
+ .throttle = metrousb_throttle,
+ .unthrottle = metrousb_unthrottle,
+ .tiocmget = metrousb_tiocmget,
+ .tiocmset = metrousb_tiocmset,
+};
+
+static struct usb_serial_driver * const serial_drivers[] = {
+ &metrousb_device,
+ NULL,
+};
+
+module_usb_serial_driver(metrousb_driver, serial_drivers);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Philip Nicastro");
+MODULE_AUTHOR("Aleksey Babahin <tamerlan311@gmail.com>");
+MODULE_DESCRIPTION(DRIVER_DESC);
+
+/* Module input parameters */
+module_param(debug, bool, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(debug, "Print debug info (bool 1=on, 0=off)");