+/*
+ * vizzini.c
+ *
+ * Copyright (c) 2013 Exar Corporation, Inc.
+ *
+ * ChangeLog:
+ *
+ * v1.0- Support for Kernel 3.5 and newer,
+ * based on cdc-acm.c sample of 3.6 kernel.
+ */
+
+
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#undef DEBUG
+#undef VERBOSE_DEBUG
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/tty.h>
+#include <linux/serial.h>
+#include <linux/tty_driver.h>
+#include <linux/tty_flip.h>
+#include <linux/serial.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/uaccess.h>
+#include <linux/usb.h>
+#include <linux/usb/cdc.h>
+#include <asm/byteorder.h>
+#include <asm/unaligned.h>
+#include <linux/list.h>
+
+#include "vizzini.h"
+#include "vzioctl.h"
+
+#define DRIVER_AUTHOR "Ravi Reddy"
+#define DRIVER_DESC "Exar USB UART Driver for XR21V141x "
+
+static struct usb_driver xr21v141x_driver;
+static struct tty_driver *xr21v141x_tty_driver;
+static struct xr21v141x *xr21v141x_table[XR21V141X_TTY_MINORS];
+
+static DEFINE_MUTEX(xr21v141x_table_lock);
+
+/*
+ * Functions for ACM control messages.
+ */
+
+static int xr21v141x_ctrl_msg(struct xr21v141x *xr21v141x, int request, int value,
+ void *buf, int len)
+{
+ int retval = usb_control_msg(xr21v141x->dev, usb_sndctrlpipe(xr21v141x->dev, 0),
+ request, USB_RT_ACM, value,
+ xr21v141x->control->altsetting[0].desc.bInterfaceNumber,
+ buf, len, 5000);
+ dev_dbg(&xr21v141x->control->dev,
+ "%s - rq 0x%02x, val %#x, len %#x, result %d\n",
+ __func__, request, value, len, retval);
+ return retval < 0 ? retval : 0;
+}
+
+#define xr21v141x_set_control(xr21v141x, control) \
+ xr21v141x_ctrl_msg(xr21v141x, USB_CDC_REQ_SET_CONTROL_LINE_STATE, control, NULL, 0)
+#define xr21v141x_set_line(xr21v141x, line) \
+ xr21v141x_ctrl_msg(xr21v141x, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line))
+#define xr21v141x_send_break(xr21v141x, ms) \
+ xr21v141x_ctrl_msg(xr21v141x, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0)
+
+/*
+ * Write buffer management.
+ * All of these assume proper locks taken by the caller.
+ */
+
+static int xr21v141x_wb_alloc(struct xr21v141x *xr21v141x)
+{
+ int i, wbn;
+ struct xr21v141x_wb *wb;
+
+ wbn = 0;
+ i = 0;
+ for (;;) {
+ wb = &xr21v141x->wb[wbn];
+ if (!wb->use) {
+ wb->use = 1;
+ return wbn;
+ }
+ wbn = (wbn + 1) % ACM_NW;
+ if (++i >= ACM_NW)
+ return -1;
+ }
+}
+
+static int xr21v141x_wb_is_avail(struct xr21v141x *xr21v141x)
+{
+ int i, n;
+ unsigned long flags;
+
+ n = ACM_NW;
+ spin_lock_irqsave(&xr21v141x->write_lock, flags);
+ for (i = 0; i < ACM_NW; i++)
+ n -= xr21v141x->wb[i].use;
+ spin_unlock_irqrestore(&xr21v141x->write_lock, flags);
+ return n;
+}
+
+/*
+ * Finish write. Caller must hold xr21v141x->write_lock
+ */
+static void xr21v141x_write_done(struct xr21v141x *xr21v141x, struct xr21v141x_wb *wb)
+{
+ wb->use = 0;
+ xr21v141x->transmitting--;
+ usb_autopm_put_interface_async(xr21v141x->control);
+}
+
+/*
+ * Poke write.
+ *
+ * the caller is responsible for locking
+ */
+
+static int xr21v141x_start_wb(struct xr21v141x *xr21v141x, struct xr21v141x_wb *wb)
+{
+ int rc;
+
+ xr21v141x->transmitting++;
+
+ wb->urb->transfer_buffer = wb->buf;
+ wb->urb->transfer_dma = wb->dmah;
+ wb->urb->transfer_buffer_length = wb->len;
+ wb->urb->dev = xr21v141x->dev;
+
+ rc = usb_submit_urb(wb->urb, GFP_ATOMIC);
+ if (rc < 0) {
+ dev_err(&xr21v141x->data->dev,
+ "%s - usb_submit_urb(write bulk) failed: %d\n",
+ __func__, rc);
+ xr21v141x_write_done(xr21v141x, wb);
+ }
+ return rc;
+}
+
+static int xr21v141x_write_start(struct xr21v141x *xr21v141x, int wbn)
+{
+ unsigned long flags;
+ struct xr21v141x_wb *wb = &xr21v141x->wb[wbn];
+ int rc;
+
+ spin_lock_irqsave(&xr21v141x->write_lock, flags);
+ if (!xr21v141x->dev) {
+ wb->use = 0;
+ spin_unlock_irqrestore(&xr21v141x->write_lock, flags);
+ return -ENODEV;
+ }
+
+ dev_vdbg(&xr21v141x->data->dev, "%s - susp_count %d\n", __func__,
+ xr21v141x->susp_count);
+ usb_autopm_get_interface_async(xr21v141x->control);
+ if (xr21v141x->susp_count) {
+ if (!xr21v141x->delayed_wb)
+ xr21v141x->delayed_wb = wb;
+ else
+ usb_autopm_put_interface_async(xr21v141x->control);
+ spin_unlock_irqrestore(&xr21v141x->write_lock, flags);
+ return 0; /* A white lie */
+ }
+ usb_mark_last_busy(xr21v141x->dev);
+
+ rc = xr21v141x_start_wb(xr21v141x, wb);
+ spin_unlock_irqrestore(&xr21v141x->write_lock, flags);
+
+ return rc;
+
+}
+/*
+ * attributes exported through sysfs
+ */
+static ssize_t show_caps
+(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct usb_interface *intf = to_usb_interface(dev);
+ struct xr21v141x *xr21v141x = usb_get_intfdata(intf);
+
+ return sprintf(buf, "%d", xr21v141x->ctrl_caps);
+}
+static DEVICE_ATTR(bmCapabilities, S_IRUGO, show_caps, NULL);
+
+static ssize_t show_country_codes
+(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct usb_interface *intf = to_usb_interface(dev);
+ struct xr21v141x *xr21v141x = usb_get_intfdata(intf);
+
+ memcpy(buf, xr21v141x->country_codes, xr21v141x->country_code_size);
+ return xr21v141x->country_code_size;
+}
+
+static DEVICE_ATTR(wCountryCodes, S_IRUGO, show_country_codes, NULL);
+
+static ssize_t show_country_rel_date
+(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct usb_interface *intf = to_usb_interface(dev);
+ struct xr21v141x *xr21v141x = usb_get_intfdata(intf);
+
+ return sprintf(buf, "%d", xr21v141x->country_rel_date);
+}
+
+static DEVICE_ATTR(iCountryCodeRelDate, S_IRUGO, show_country_rel_date, NULL);
+/*
+ * Interrupt handlers for various ACM device responses
+ */
+
+/* control interface reports status changes with "interrupt" transfers */
+static void xr21v141x_ctrl_irq(struct urb *urb)
+{
+ struct xr21v141x *xr21v141x = urb->context;
+ struct usb_cdc_notification *dr = urb->transfer_buffer;
+ struct tty_struct *tty;
+ unsigned char *data;
+ int newctrl;
+ int retval;
+ int status = urb->status;
+
+ switch (status) {
+ case 0:
+ /* success */
+ break;
+ case -ECONNRESET:
+ case -ENOENT:
+ case -ESHUTDOWN:
+ /* this urb is terminated, clean up */
+ dev_dbg(&xr21v141x->control->dev,
+ "%s - urb shutting down with status: %d\n",
+ __func__, status);
+ return;
+ default:
+ dev_dbg(&xr21v141x->control->dev,
+ "%s - nonzero urb status received: %d\n",
+ __func__, status);
+ goto exit;
+ }
+
+ usb_mark_last_busy(xr21v141x->dev);
+
+ data = (unsigned char *)(dr + 1);
+ switch (dr->bNotificationType) {
+ case USB_CDC_NOTIFY_NETWORK_CONNECTION:
+ dev_dbg(&xr21v141x->control->dev, "%s - network connection: %d\n",
+ __func__, dr->wValue);
+ break;
+
+ case USB_CDC_NOTIFY_SERIAL_STATE:
+ tty = tty_port_tty_get(&xr21v141x->port);
+ newctrl = get_unaligned_le16(data);
+
+ if (tty) {
+ if (!xr21v141x->clocal &&
+ (xr21v141x->ctrlin & ~newctrl & ACM_CTRL_DCD)) {
+ dev_dbg(&xr21v141x->control->dev,
+ "%s - calling hangup\n", __func__);
+ tty_hangup(tty);
+ }
+ tty_kref_put(tty);
+ }
+
+ xr21v141x->ctrlin = newctrl;
+
+ dev_dbg(&xr21v141x->control->dev,
+ "%s - input control lines: dcd%c dsr%c break%c "
+ "ring%c framing%c parity%c overrun%c\n",
+ __func__,
+ xr21v141x->ctrlin & ACM_CTRL_DCD ? '+' : '-',
+ xr21v141x->ctrlin & ACM_CTRL_DSR ? '+' : '-',
+ xr21v141x->ctrlin & ACM_CTRL_BRK ? '+' : '-',
+ xr21v141x->ctrlin & ACM_CTRL_RI ? '+' : '-',
+ xr21v141x->ctrlin & ACM_CTRL_FRAMING ? '+' : '-',
+ xr21v141x->ctrlin & ACM_CTRL_PARITY ? '+' : '-',
+ xr21v141x->ctrlin & ACM_CTRL_OVERRUN ? '+' : '-');
+ break;
+
+ default:
+ dev_dbg(&xr21v141x->control->dev,
+ "%s - unknown notification %d received: index %d "
+ "len %d data0 %d data1 %d\n",
+ __func__,
+ dr->bNotificationType, dr->wIndex,
+ dr->wLength, data[0], data[1]);
+ break;
+ }
+exit:
+ retval = usb_submit_urb(urb, GFP_ATOMIC);
+ if (retval)
+ dev_err(&xr21v141x->control->dev, "%s - usb_submit_urb failed: %d\n",
+ __func__, retval);
+}
+
+static int xr21v141x_submit_read_urb(struct xr21v141x *xr21v141x, int index, gfp_t mem_flags)
+{
+ int res;
+
+ if (!test_and_clear_bit(index, &xr21v141x->read_urbs_free))
+ return 0;
+
+ dev_vdbg(&xr21v141x->data->dev, "%s - urb %d\n", __func__, index);
+
+ res = usb_submit_urb(xr21v141x->read_urbs[index], mem_flags);
+ if (res) {
+ if (res != -EPERM) {
+ dev_err(&xr21v141x->data->dev,
+ "%s - usb_submit_urb failed: %d\n",
+ __func__, res);
+ }
+ set_bit(index, &xr21v141x->read_urbs_free);
+ return res;
+ }
+
+ return 0;
+}
+
+static int xr21v141x_submit_read_urbs(struct xr21v141x *xr21v141x, gfp_t mem_flags)
+{
+ int res;
+ int i;
+
+ for (i = 0; i < xr21v141x->rx_buflimit; ++i) {
+ res = xr21v141x_submit_read_urb(xr21v141x, i, mem_flags);
+ if (res)
+ return res;
+ }
+
+ return 0;
+}
+
+static void xr21v141x_process_read_urb(struct xr21v141x *xr21v141x, struct urb *urb)
+{
+ struct tty_struct *tty;
+
+ if (!urb->actual_length)
+ return;
+
+ tty = tty_port_tty_get(&xr21v141x->port);
+ if (!tty)
+ return;
+
+ tty_insert_flip_string(tty, urb->transfer_buffer, urb->actual_length);
+ tty_flip_buffer_push(tty);
+
+ tty_kref_put(tty);
+}
+
+static void xr21v141x_read_bulk_callback(struct urb *urb)
+{
+ struct xr21v141x_rb *rb = urb->context;
+ struct xr21v141x *xr21v141x = rb->instance;
+ unsigned long flags;
+
+ dev_vdbg(&xr21v141x->data->dev, "%s - urb %d, len %d\n", __func__,
+ rb->index, urb->actual_length);
+ set_bit(rb->index, &xr21v141x->read_urbs_free);
+
+ if (!xr21v141x->dev) {
+ dev_dbg(&xr21v141x->data->dev, "%s - disconnected\n", __func__);
+ return;
+ }
+ usb_mark_last_busy(xr21v141x->dev);
+
+ if (urb->status) {
+ dev_dbg(&xr21v141x->data->dev, "%s - non-zero urb status: %d\n",
+ __func__, urb->status);
+ return;
+ }
+ xr21v141x_process_read_urb(xr21v141x, urb);
+
+ /* throttle device if requested by tty */
+ spin_lock_irqsave(&xr21v141x->read_lock, flags);
+ xr21v141x->throttled = xr21v141x->throttle_req;
+ if (!xr21v141x->throttled && !xr21v141x->susp_count) {
+ spin_unlock_irqrestore(&xr21v141x->read_lock, flags);
+ xr21v141x_submit_read_urb(xr21v141x, rb->index, GFP_ATOMIC);
+ } else {
+ spin_unlock_irqrestore(&xr21v141x->read_lock, flags);
+ }
+}
+
+/* data interface wrote those outgoing bytes */
+static void xr21v141x_write_bulk(struct urb *urb)
+{
+ struct xr21v141x_wb *wb = urb->context;
+ struct xr21v141x *xr21v141x = wb->instance;
+ unsigned long flags;
+
+ if (urb->status || (urb->actual_length != urb->transfer_buffer_length))
+ dev_vdbg(&xr21v141x->data->dev, "%s - len %d/%d, status %d\n",
+ __func__,
+ urb->actual_length,
+ urb->transfer_buffer_length,
+ urb->status);
+
+ spin_lock_irqsave(&xr21v141x->write_lock, flags);
+ xr21v141x_write_done(xr21v141x, wb);
+ spin_unlock_irqrestore(&xr21v141x->write_lock, flags);
+ schedule_work(&xr21v141x->work);
+}
+
+static void xr21v141x_softint(struct work_struct *work)
+{
+ struct xr21v141x *xr21v141x = container_of(work, struct xr21v141x, work);
+ struct tty_struct *tty;
+
+ dev_vdbg(&xr21v141x->data->dev, "%s\n", __func__);
+
+ tty = tty_port_tty_get(&xr21v141x->port);
+ if (!tty)
+ return;
+ tty_wakeup(tty);
+ tty_kref_put(tty);
+}
+
+/*
+ * TTY handlers
+ */
+
+static struct xr21v141x *xr21v141x_get_by_index(unsigned index)
+{
+ struct xr21v141x *xr21v141x;
+
+ mutex_lock(&xr21v141x_table_lock);
+ xr21v141x = xr21v141x_table[index];
+ if (xr21v141x) {
+ mutex_lock(&xr21v141x->mutex);
+ if (xr21v141x->disconnected) {
+ mutex_unlock(&xr21v141x->mutex);
+ xr21v141x = NULL;
+ } else {
+ tty_port_get(&xr21v141x->port);
+ mutex_unlock(&xr21v141x->mutex);
+ }
+ }
+ mutex_unlock(&xr21v141x_table_lock);
+ return xr21v141x;
+}
+
+/*
+ * Try to find an available minor number and if found, associate it with 'xr21v141x'.
+ */
+static int xr21v141x_alloc_minor(struct xr21v141x *xr21v141x)
+{
+ int minor;
+
+ mutex_lock(&xr21v141x_table_lock);
+ for (minor = 0; minor < XR21V141X_TTY_MINORS; minor++) {
+ if (!xr21v141x_table[minor]) {
+ xr21v141x_table[minor] = xr21v141x;
+ break;
+ }
+ }
+ mutex_unlock(&xr21v141x_table_lock);
+
+ return minor;
+}
+
+/* Release the minor number associated with 'xr21v141x'. */
+static void xr21v141x_release_minor(struct xr21v141x *xr21v141x)
+{
+ mutex_lock(&xr21v141x_table_lock);
+ xr21v141x_table[xr21v141x->minor] = NULL;
+ mutex_unlock(&xr21v141x_table_lock);
+}
+
+static int xr21v141x_tty_install(struct tty_driver *driver, struct tty_struct *tty)
+{
+ struct xr21v141x *xr21v141x;
+ int retval;
+
+ dev_dbg(tty->dev, "%s\n", __func__);
+
+ xr21v141x = xr21v141x_get_by_index(tty->index);
+ if (!xr21v141x)
+ return -ENODEV;
+
+ retval = tty_standard_install(driver, tty);
+ if (retval)
+ goto error_init_termios;
+
+ tty->driver_data = xr21v141x;
+
+ return 0;
+
+error_init_termios:
+ tty_port_put(&xr21v141x->port);
+ return retval;
+}
+
+static int xr21v141x_tty_open(struct tty_struct *tty, struct file *filp)
+{
+ struct xr21v141x *xr21v141x = tty->driver_data;
+
+ dev_dbg(tty->dev, "%s\n", __func__);
+
+ return tty_port_open(&xr21v141x->port, tty, filp);
+}
+
+static int xr21v141x_port_activate(struct tty_port *port, struct tty_struct *tty)
+{
+ struct xr21v141x *xr21v141x = container_of(port, struct xr21v141x, port);
+ int retval = -ENODEV;
+
+ dev_dbg(&xr21v141x->control->dev, "%s\n", __func__);
+
+ mutex_lock(&xr21v141x->mutex);
+ if (xr21v141x->disconnected)
+ goto disconnected;
+
+ retval = usb_autopm_get_interface(xr21v141x->control);
+ if (retval)
+ goto error_get_interface;
+
+ set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
+ xr21v141x->control->needs_remote_wakeup = 1;
+
+ xr21v141x->ctrlurb->dev = xr21v141x->dev;
+ if (usb_submit_urb(xr21v141x->ctrlurb, GFP_KERNEL)) {
+ dev_err(&xr21v141x->control->dev,
+ "%s - usb_submit_urb(ctrl irq) failed\n", __func__);
+ goto error_submit_urb;
+ }
+
+ xr21v141x->ctrlout = ACM_CTRL_DTR | ACM_CTRL_RTS;
+ if (xr21v141x_set_control(xr21v141x, xr21v141x->ctrlout) < 0 &&
+ (xr21v141x->ctrl_caps & USB_CDC_CAP_LINE))
+ goto error_set_control;
+
+ usb_autopm_put_interface(xr21v141x->control);
+
+ /*
+ * Unthrottle device in case the TTY was closed while throttled.
+ */
+ spin_lock_irq(&xr21v141x->read_lock);
+ xr21v141x->throttled = 0;
+ xr21v141x->throttle_req = 0;
+ spin_unlock_irq(&xr21v141x->read_lock);
+
+ if (xr21v141x_submit_read_urbs(xr21v141x, GFP_KERNEL))
+ goto error_submit_read_urbs;
+
+ mutex_unlock(&xr21v141x->mutex);
+
+ return 0;
+
+error_submit_read_urbs:
+ xr21v141x->ctrlout = 0;
+ xr21v141x_set_control(xr21v141x, xr21v141x->ctrlout);
+error_set_control:
+ usb_kill_urb(xr21v141x->ctrlurb);
+error_submit_urb:
+ usb_autopm_put_interface(xr21v141x->control);
+error_get_interface:
+disconnected:
+ mutex_unlock(&xr21v141x->mutex);
+ return retval;
+}
+
+static void xr21v141x_port_destruct(struct tty_port *port)
+{
+ struct xr21v141x *xr21v141x = container_of(port, struct xr21v141x, port);
+
+ dev_dbg(&xr21v141x->control->dev, "%s\n", __func__);
+
+ tty_unregister_device(xr21v141x_tty_driver, xr21v141x->minor);
+ xr21v141x_release_minor(xr21v141x);
+ usb_put_intf(xr21v141x->control);
+ kfree(xr21v141x->country_codes);
+ kfree(xr21v141x);
+}
+
+static void xr21v141x_port_shutdown(struct tty_port *port)
+{
+ struct xr21v141x *xr21v141x = container_of(port, struct xr21v141x, port);
+ int i;
+
+ dev_dbg(&xr21v141x->control->dev, "%s\n", __func__);
+
+ mutex_lock(&xr21v141x->mutex);
+ if (!xr21v141x->disconnected) {
+ usb_autopm_get_interface(xr21v141x->control);
+ xr21v141x_set_control(xr21v141x, xr21v141x->ctrlout = 0);
+ usb_kill_urb(xr21v141x->ctrlurb);
+ for (i = 0; i < ACM_NW; i++)
+ usb_kill_urb(xr21v141x->wb[i].urb);
+ for (i = 0; i < xr21v141x->rx_buflimit; i++)
+ usb_kill_urb(xr21v141x->read_urbs[i]);
+ xr21v141x->control->needs_remote_wakeup = 0;
+ usb_autopm_put_interface(xr21v141x->control);
+ }
+ mutex_unlock(&xr21v141x->mutex);
+}
+
+static void xr21v141x_tty_cleanup(struct tty_struct *tty)
+{
+ struct xr21v141x *xr21v141x = tty->driver_data;
+ dev_dbg(&xr21v141x->control->dev, "%s\n", __func__);
+ tty_port_put(&xr21v141x->port);
+}
+
+static void xr21v141x_tty_hangup(struct tty_struct *tty)
+{
+ struct xr21v141x *xr21v141x = tty->driver_data;
+ dev_dbg(&xr21v141x->control->dev, "%s\n", __func__);
+ tty_port_hangup(&xr21v141x->port);
+}
+
+static void xr21v141x_tty_close(struct tty_struct *tty, struct file *filp)
+{
+ struct xr21v141x *xr21v141x = tty->driver_data;
+ dev_dbg(&xr21v141x->control->dev, "%s\n", __func__);
+ tty_port_close(&xr21v141x->port, tty, filp);
+}
+
+static int xr21v141x_tty_write(struct tty_struct *tty,
+ const unsigned char *buf, int count)
+{
+ struct xr21v141x *xr21v141x = tty->driver_data;
+ int stat;
+ unsigned long flags;
+ int wbn;
+ struct xr21v141x_wb *wb;
+
+ if (!count)
+ return 0;
+
+ dev_vdbg(&xr21v141x->data->dev, "%s - count %d\n", __func__, count);
+
+ spin_lock_irqsave(&xr21v141x->write_lock, flags);
+ wbn = xr21v141x_wb_alloc(xr21v141x);
+ if (wbn < 0) {
+ spin_unlock_irqrestore(&xr21v141x->write_lock, flags);
+ return 0;
+ }
+ wb = &xr21v141x->wb[wbn];
+
+ count = (count > xr21v141x->writesize) ? xr21v141x->writesize : count;
+ dev_vdbg(&xr21v141x->data->dev, "%s - write %d\n", __func__, count);
+ memcpy(wb->buf, buf, count);
+ wb->len = count;
+ spin_unlock_irqrestore(&xr21v141x->write_lock, flags);
+
+ stat = xr21v141x_write_start(xr21v141x, wbn);
+ if (stat < 0)
+ return stat;
+ return count;
+}
+
+static int xr21v141x_tty_write_room(struct tty_struct *tty)
+{
+ struct xr21v141x *xr21v141x = tty->driver_data;
+
+ return xr21v141x_wb_is_avail(xr21v141x) ? xr21v141x->writesize : 0;
+}
+
+static int xr21v141x_tty_chars_in_buffer(struct tty_struct *tty)
+{
+ struct xr21v141x *xr21v141x = tty->driver_data;
+ /*
+ * if the device was unplugged then any remaining characters fell out
+ * of the connector ;)
+ */
+ if (xr21v141x->disconnected)
+ return 0;
+
+ return (ACM_NW - xr21v141x_wb_is_avail(xr21v141x)) * xr21v141x->writesize;
+}
+
+static void xr21v141x_tty_throttle(struct tty_struct *tty)
+{
+ struct xr21v141x *xr21v141x = tty->driver_data;
+
+ spin_lock_irq(&xr21v141x->read_lock);
+ xr21v141x->throttle_req = 1;
+ spin_unlock_irq(&xr21v141x->read_lock);
+}
+
+static void xr21v141x_tty_unthrottle(struct tty_struct *tty)
+{
+ struct xr21v141x *xr21v141x = tty->driver_data;
+ unsigned int was_throttled;
+
+ spin_lock_irq(&xr21v141x->read_lock);
+ was_throttled = xr21v141x->throttled;
+ xr21v141x->throttled = 0;
+ xr21v141x->throttle_req = 0;
+ spin_unlock_irq(&xr21v141x->read_lock);
+
+ if (was_throttled)
+ xr21v141x_submit_read_urbs(xr21v141x, GFP_KERNEL);
+}
+
+static int xr21v141x_tty_break_ctl(struct tty_struct *tty, int state)
+{
+ struct xr21v141x *xr21v141x = tty->driver_data;
+ int retval;
+
+ retval = xr21v141x_send_break(xr21v141x, state ? 0xffff : 0);
+ if (retval < 0)
+ dev_dbg(&xr21v141x->control->dev, "%s - send break failed\n",
+ __func__);
+ return retval;
+}
+
+static int xr21v141x_tty_tiocmget(struct tty_struct *tty)
+{
+ struct xr21v141x *xr21v141x = tty->driver_data;
+
+ return (xr21v141x->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) |
+ (xr21v141x->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) |
+ (xr21v141x->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) |
+ (xr21v141x->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) |
+ (xr21v141x->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) |
+ TIOCM_CTS;
+}
+
+static int xr21v141x_tty_tiocmset(struct tty_struct *tty,
+ unsigned int set, unsigned int clear)
+{
+ struct xr21v141x *xr21v141x = tty->driver_data;
+ unsigned int newctrl;
+
+ newctrl = xr21v141x->ctrlout;
+ set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
+ (set & TIOCM_RTS ? ACM_CTRL_RTS : 0);
+ clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
+ (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0);
+
+ newctrl = (newctrl & ~clear) | set;
+
+ if (xr21v141x->ctrlout == newctrl)
+ return 0;
+ return xr21v141x_set_control(xr21v141x, xr21v141x->ctrlout = newctrl);
+}
+
+static int get_serial_info(struct xr21v141x *xr21v141x, struct serial_struct __user *info)
+{
+ struct serial_struct tmp;
+
+ if (!info)
+ return -EINVAL;
+
+ memset(&tmp, 0, sizeof(tmp));
+ tmp.flags = ASYNC_LOW_LATENCY;
+ tmp.xmit_fifo_size = xr21v141x->writesize;
+ tmp.baud_base = le32_to_cpu(xr21v141x->line.dwDTERate);
+ tmp.close_delay = xr21v141x->port.close_delay / 10;
+ tmp.closing_wait = xr21v141x->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
+ ASYNC_CLOSING_WAIT_NONE :
+ xr21v141x->port.closing_wait / 10;
+
+ if (copy_to_user(info, &tmp, sizeof(tmp)))
+ return -EFAULT;
+ else
+ return 0;
+}
+
+static int set_serial_info(struct xr21v141x *xr21v141x,
+ struct serial_struct __user *newinfo)
+{
+ struct serial_struct new_serial;
+ unsigned int closing_wait, close_delay;
+ int retval = 0;
+
+ if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
+ return -EFAULT;
+
+ close_delay = new_serial.close_delay * 10;
+ closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
+ ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10;
+
+ mutex_lock(&xr21v141x->port.mutex);
+
+ if (!capable(CAP_SYS_ADMIN)) {
+ if ((close_delay != xr21v141x->port.close_delay) ||
+ (closing_wait != xr21v141x->port.closing_wait))
+ retval = -EPERM;
+ else
+ retval = -EOPNOTSUPP;
+ } else {
+ xr21v141x->port.close_delay = close_delay;
+ xr21v141x->port.closing_wait = closing_wait;
+ }
+
+ mutex_unlock(&xr21v141x->port.mutex);
+ return retval;
+}
+
+
+
+static int vizzini_set_reg(struct xr21v141x *xr21v141x,
+ int block, int regnum, int value)
+{
+ int result;
+
+ dev_dbg(&xr21v141x->control->dev, "%s 0x%02x:0x%02x = 0x%02x\n", __func__, block, regnum, value);
+
+ result = usb_control_msg(xr21v141x->dev, /* usb device */
+ usb_sndctrlpipe(xr21v141x->dev, 0), /* endpoint pipe */
+ XR_SET_REG, /* request */
+ USB_DIR_OUT | USB_TYPE_VENDOR, /* request_type */
+ value, /* request value */
+ regnum | (block << 8), /* index */
+ NULL, /* data */
+ 0, /* size */
+ 5000); /* timeout */
+ return result;
+}
+
+
+static int vizzini_get_reg(struct xr21v141x *xr21v141x,
+ int block, int reg, char *value)
+{
+ int result;
+
+ result = usb_control_msg(xr21v141x->dev, /* usb device */
+ usb_rcvctrlpipe(xr21v141x->dev, 0), /* endpoint pipe */
+ XR_GETN_REG, /* request */
+ USB_DIR_IN | USB_TYPE_VENDOR, /* request_type */
+ 0, /* request value */
+ reg | (block << 8), /* index */
+ value, /* data */
+ 1, /* size */
+ 5000); /* timeout */
+
+ return result;
+}
+
+
+static void vizzini_disable(struct xr21v141x *xr21v141x)
+{
+ int block = xr21v141x->block;
+
+ vizzini_set_reg(xr21v141x, block, UART_ENABLE, 0);
+ vizzini_set_reg(xr21v141x, URM_REG_BLOCK, URM_ENABLE_BASE + block, 0);
+}
+
+
+static void vizzini_enable(struct xr21v141x *xr21v141x)
+{
+ int block = xr21v141x->block;
+
+ vizzini_set_reg(xr21v141x, URM_REG_BLOCK, URM_ENABLE_BASE + block, URM_ENABLE_0_TX);
+ vizzini_set_reg(xr21v141x, block, UART_ENABLE, UART_ENABLE_TX | UART_ENABLE_RX);
+ vizzini_set_reg(xr21v141x, URM_REG_BLOCK, URM_ENABLE_BASE + block, URM_ENABLE_0_TX | URM_ENABLE_0_RX);
+}
+
+
+static void vizzini_loopback(struct xr21v141x *xr21v141x, int from)
+{
+ int block = xr21v141x->block;
+ int lb;
+
+ switch (from)
+ {
+ case 0: lb = UART_LOOPBACK_CTL_RX_UART0; break;
+ case 1: lb = UART_LOOPBACK_CTL_RX_UART1; break;
+ case 2: lb = UART_LOOPBACK_CTL_RX_UART2; break;
+ case 3: lb = UART_LOOPBACK_CTL_RX_UART3; break;
+ default: return;
+ }
+
+ dev_info(&xr21v141x->control->dev, "Internal loopback from %d\n", from);
+
+ vizzini_disable(xr21v141x);
+ vizzini_set_reg(xr21v141x, block, UART_LOOPBACK_CTL, UART_LOOPBACK_CTL_ENABLE | lb);
+ vizzini_enable(xr21v141x);
+}
+
+static int vizzini_test_mode(struct xr21v141x *xr21v141x,
+ int selector)
+{
+ int retval = usb_control_msg(xr21v141x->dev, usb_sndctrlpipe(xr21v141x->dev, 0),
+ USB_REQ_SET_FEATURE,
+ USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_DEVICE,
+ USB_DEVICE_TEST_MODE,
+ selector << 8,
+ NULL, 0, 5000);
+ dev_dbg(&xr21v141x->control->dev, "vz_test_mode: selector=0x%02x\n", selector);
+ return retval < 0 ? retval : 0;
+}
+
+static int xr21v141x_tty_ioctl(struct tty_struct *tty,
+ unsigned int cmd, unsigned long arg)
+{
+ struct xr21v141x *xr21v141x = tty->driver_data;
+ int rv = -ENOIOCTLCMD;
+
+ unsigned int block, reg, val, match, preciseflags, unicast, broadcast, flow, selector;
+ char *data;
+
+ switch (cmd) {
+ case TIOCGSERIAL: /* gets serial port data */
+ rv = get_serial_info(xr21v141x, (struct serial_struct __user *) arg);
+ break;
+ case TIOCSSERIAL:
+ rv = set_serial_info(xr21v141x, (struct serial_struct __user *) arg);
+ break;
+
+ case VZIOC_GET_REG:
+ if (get_user(block, (int __user *)arg))
+ return -EFAULT;
+ if (get_user(reg, (int __user *)(arg + sizeof(int))))
+ return -EFAULT;
+
+ data = kmalloc(1, GFP_KERNEL);
+ if (data == NULL) {
+ dev_err(&xr21v141x->control->dev, "%s - Cannot allocate USB buffer.\n", __func__);
+ return -ENOMEM;
+ }
+
+ if (block == -1)
+ block = xr21v141x->block;
+
+ rv = vizzini_get_reg(xr21v141x, block, reg, data);
+ if (rv != 1) {
+ dev_err(&xr21v141x->control->dev, "Cannot get register (%d)\n", rv);
+ kfree(data);
+ return -EFAULT;
+ }
+
+ if (put_user(data[0], (int __user *)(arg + 2 * sizeof(int)))) {
+ dev_err(&xr21v141x->control->dev, "Cannot put user result\n");
+ kfree(data);
+ return -EFAULT;
+ }
+
+ kfree(data);
+ break;
+
+ case VZIOC_SET_REG:
+ if (get_user(block, (int __user *)arg))
+ return -EFAULT;
+ if (get_user(reg, (int __user *)(arg + sizeof(int))))
+ return -EFAULT;
+ if (get_user(val, (int __user *)(arg + 2 * sizeof(int))))
+ return -EFAULT;
+
+ if (block == -1)
+ block = xr21v141x->block;
+
+ rv = vizzini_set_reg(xr21v141x, block, reg, val);
+ if (rv < 0)
+ return -EFAULT;
+ break;
+
+ case VZIOC_SET_ADDRESS_MATCH:
+ match = arg;
+
+ dev_dbg(&xr21v141x->control->dev, "%s VIOC_SET_ADDRESS_MATCH %d\n", __func__, match);
+
+ vizzini_disable(xr21v141x);
+
+ if (match & VZ_ADDRESS_MATCH_DISABLE) {
+ flow = UART_FLOW_MODE_NONE;
+ } else {
+ flow = UART_FLOW_MODE_ADDR_MATCH_TX;
+ unicast = (match >> VZ_ADDRESS_UNICAST_S) & 0xff;
+ broadcast = (match >> VZ_ADDRESS_BROADCAST_S) & 0xff;
+ }
+
+ dev_dbg(&xr21v141x->control->dev, "address match: flow=%d ucast=%d bcast=%u\n",
+ flow, unicast, broadcast);
+ vizzini_set_reg(xr21v141x, xr21v141x->block, UART_FLOW, flow);
+ vizzini_set_reg(xr21v141x, xr21v141x->block, UART_XON_CHAR, unicast);
+ vizzini_set_reg(xr21v141x, xr21v141x->block, UART_XOFF_CHAR, broadcast);
+
+ vizzini_enable(xr21v141x);
+ break;
+
+ case VZIOC_SET_PRECISE_FLAGS:
+ preciseflags = arg;
+
+ dev_dbg(&xr21v141x->control->dev, "%s VIOC_SET_PRECISE_FLAGS %d\n", __func__, preciseflags);
+
+ vizzini_disable(xr21v141x);
+
+ if (preciseflags) {
+ xr21v141x->preciseflags = 1;
+ } else {
+ xr21v141x->preciseflags = 0;
+ }
+
+ vizzini_set_reg(xr21v141x, EPLOCALS_REG_BLOCK,
+ (xr21v141x->block * MEM_EP_LOCALS_SIZE) + EP_WIDE_MODE,
+ xr21v141x->preciseflags);
+
+ vizzini_enable(xr21v141x);
+ rv = 0;
+ break;
+
+ case VZIOC_TEST_MODE:
+ selector = arg;
+ dev_dbg(&xr21v141x->control->dev, "%s VIOC_TEST_MODE 0x%02x\n", __func__, selector);
+ vizzini_test_mode(xr21v141x, selector);
+ rv = 0;
+ break;
+
+ case VZIOC_LOOPBACK:
+ selector = arg;
+ dev_dbg(&xr21v141x->control->dev, "VIOC_LOOPBACK 0x%02x\n", selector);
+ vizzini_loopback(xr21v141x, selector);
+ rv = 0;
+ break;
+ }
+
+ return rv;
+}
+
+struct vizzini_baud_rate
+{
+ unsigned int tx;
+ unsigned int rx0;
+ unsigned int rx1;
+};
+
+static struct vizzini_baud_rate vizzini_baud_rates[] = {
+ { 0x000, 0x000, 0x000 },
+ { 0x000, 0x000, 0x000 },
+ { 0x100, 0x000, 0x100 },
+ { 0x020, 0x400, 0x020 },
+ { 0x010, 0x100, 0x010 },
+ { 0x208, 0x040, 0x208 },
+ { 0x104, 0x820, 0x108 },
+ { 0x844, 0x210, 0x884 },
+ { 0x444, 0x110, 0x444 },
+ { 0x122, 0x888, 0x224 },
+ { 0x912, 0x448, 0x924 },
+ { 0x492, 0x248, 0x492 },
+ { 0x252, 0x928, 0x292 },
+ { 0X94A, 0X4A4, 0XA52 },
+ { 0X52A, 0XAA4, 0X54A },
+ { 0XAAA, 0x954, 0X4AA },
+ { 0XAAA, 0x554, 0XAAA },
+ { 0x555, 0XAD4, 0X5AA },
+ { 0XB55, 0XAB4, 0X55A },
+ { 0X6B5, 0X5AC, 0XB56 },
+ { 0X5B5, 0XD6C, 0X6D6 },
+ { 0XB6D, 0XB6A, 0XDB6 },
+ { 0X76D, 0X6DA, 0XBB6 },
+ { 0XEDD, 0XDDA, 0X76E },
+ { 0XDDD, 0XBBA, 0XEEE },
+ { 0X7BB, 0XF7A, 0XDDE },
+ { 0XF7B, 0XEF6, 0X7DE },
+ { 0XDF7, 0XBF6, 0XF7E },
+ { 0X7F7, 0XFEE, 0XEFE },
+ { 0XFDF, 0XFBE, 0X7FE },
+ { 0XF7F, 0XEFE, 0XFFE },
+ { 0XFFF, 0XFFE, 0XFFD },
+};
+
+static int vizzini_set_baud_rate(struct xr21v141x *xr21v141x, unsigned int rate)
+{
+ int block = xr21v141x->block;
+ unsigned int divisor = 48000000 / rate;
+ unsigned int i = ((32 * 48000000) / rate) & 0x1f;
+ unsigned int tx_mask = vizzini_baud_rates[i].tx;
+ unsigned int rx_mask = (divisor & 1) ? vizzini_baud_rates[i].rx1 : vizzini_baud_rates[i].rx0;
+
+ dev_dbg(&xr21v141x->control->dev, "Setting baud rate to %d: i=%u div=%u tx=%03x rx=%03x\n", rate, i, divisor, tx_mask, rx_mask);
+
+ vizzini_set_reg(xr21v141x, block, UART_CLOCK_DIVISOR_0, (divisor >> 0) & 0xff);
+ vizzini_set_reg(xr21v141x, block, UART_CLOCK_DIVISOR_1, (divisor >> 8) & 0xff);
+ vizzini_set_reg(xr21v141x, block, UART_CLOCK_DIVISOR_2, (divisor >> 16) & 0xff);
+ vizzini_set_reg(xr21v141x, block, UART_TX_CLOCK_MASK_0, (tx_mask >> 0) & 0xff);
+ vizzini_set_reg(xr21v141x, block, UART_TX_CLOCK_MASK_1, (tx_mask >> 8) & 0xff);
+ vizzini_set_reg(xr21v141x, block, UART_RX_CLOCK_MASK_0, (rx_mask >> 0) & 0xff);
+ vizzini_set_reg(xr21v141x, block, UART_RX_CLOCK_MASK_1, (rx_mask >> 8) & 0xff);
+
+ return -EINVAL;
+}
+
+
+static void xr21v141x_tty_set_termios(struct tty_struct *tty,
+ struct ktermios *termios_old)
+{
+ struct xr21v141x *xr21v141x = tty->driver_data;
+ unsigned int cflag, block;
+ speed_t rate;
+ unsigned int format_size, format_parity, format_stop, flow, gpio_mode;
+
+ cflag = tty->termios->c_cflag;
+
+ xr21v141x->clocal = ((cflag & CLOCAL) != 0);
+
+ block = xr21v141x->block;
+
+ vizzini_disable(xr21v141x);
+
+ if ((cflag & CSIZE) == CS7) {
+ format_size = UART_FORMAT_SIZE_7;
+ } else if ((cflag & CSIZE) == CS5) {
+ /* Enabling 5-bit mode is really 9-bit mode! */
+ format_size = UART_FORMAT_SIZE_9;
+ } else {
+ format_size = UART_FORMAT_SIZE_8;
+ }
+ xr21v141x->trans9 = (format_size == UART_FORMAT_SIZE_9);
+
+ if (cflag & PARENB) {
+ if (cflag & PARODD) {
+ if (cflag & CMSPAR) {
+ format_parity = UART_FORMAT_PARITY_1;
+ } else {
+ format_parity = UART_FORMAT_PARITY_ODD;
+ }
+ } else {
+ if (cflag & CMSPAR) {
+ format_parity = UART_FORMAT_PARITY_0;
+ } else {
+ format_parity = UART_FORMAT_PARITY_EVEN;
+ }
+ }
+ } else {
+ format_parity = UART_FORMAT_PARITY_NONE;
+ }
+
+ if (cflag & CSTOPB) {
+ format_stop = UART_FORMAT_STOP_2;
+ } else {
+ format_stop = UART_FORMAT_STOP_1;
+ }
+
+#ifdef VIZZINI_IWA
+ if (format_size == UART_FORMAT_SIZE_8) {
+ xr21v141x->iwa = format_parity;
+ if (portdata->iwa != UART_FORMAT_PARITY_NONE) {
+ format_size = UART_FORMAT_SIZE_9;
+ format_parity = UART_FORMAT_PARITY_NONE;
+ }
+ } else {
+ xr21v141x->iwa = UART_FORMAT_PARITY_NONE;
+ }
+#endif
+ vizzini_set_reg(xr21v141x, block, UART_FORMAT, format_size | format_parity | format_stop);
+
+ if (cflag & CRTSCTS) {
+ flow = UART_FLOW_MODE_HW;
+ gpio_mode = UART_GPIO_MODE_SEL_RTS_CTS;
+ } else if (I_IXOFF(tty) || I_IXON(tty)) {
+ unsigned char start_char = START_CHAR(tty);
+ unsigned char stop_char = STOP_CHAR(tty);
+
+ flow = UART_FLOW_MODE_SW;
+ gpio_mode = UART_GPIO_MODE_SEL_GPIO;
+
+ vizzini_set_reg(xr21v141x, block, UART_XON_CHAR, start_char);
+ vizzini_set_reg(xr21v141x, block, UART_XOFF_CHAR, stop_char);
+ } else {
+ flow = UART_FLOW_MODE_NONE;
+ gpio_mode = UART_GPIO_MODE_SEL_GPIO;
+ }
+
+ vizzini_set_reg(xr21v141x, block, UART_FLOW, flow);
+ vizzini_set_reg(xr21v141x, block, UART_GPIO_MODE, gpio_mode);
+
+ if (xr21v141x->trans9) {
+ /* Turn on wide mode if we're 9-bit transparent. */
+ vizzini_set_reg(xr21v141x, EPLOCALS_REG_BLOCK, (block * MEM_EP_LOCALS_SIZE) + EP_WIDE_MODE, 1);
+#ifdef VIZZINI_IWA
+ } else if (xr21v141x->iwa != UART_FORMAT_PARITY_NONE) {
+ vizzini_set_reg(xr21v141x, EPLOCALS_REG_BLOCK, (block * MEM_EP_LOCALS_SIZE) + EP_WIDE_MODE, 1);
+#endif
+ } else if (!xr21v141x->preciseflags) {
+ /* Turn off wide mode unless we have precise flags. */
+ vizzini_set_reg(xr21v141x, EPLOCALS_REG_BLOCK, (block * MEM_EP_LOCALS_SIZE) + EP_WIDE_MODE, 0);
+ }
+
+ rate = cpu_to_le32(tty_get_baud_rate(tty));
+ if(rate)
+ vizzini_set_baud_rate(xr21v141x, rate);
+
+ xr21v141x->line.dwDTERate = rate;
+ xr21v141x->line.bCharFormat = format_stop;
+ xr21v141x->line.bParityType = format_parity;
+ xr21v141x->line.bDataBits = format_size;
+
+ vizzini_enable(xr21v141x);
+}
+
+static const struct tty_port_operations xr21v141x_port_ops = {
+ .shutdown = xr21v141x_port_shutdown,
+ .activate = xr21v141x_port_activate,
+ .destruct = xr21v141x_port_destruct,
+};
+
+/*
+ * USB probe and disconnect routines.
+ */
+
+/* Little helpers: write/read buffers free */
+static void xr21v141x_write_buffers_free(struct xr21v141x *xr21v141x)
+{
+ int i;
+ struct xr21v141x_wb *wb;
+ struct usb_device *usb_dev = interface_to_usbdev(xr21v141x->control);
+
+ for (wb = &xr21v141x->wb[0], i = 0; i < ACM_NW; i++, wb++)
+ usb_free_coherent(usb_dev, xr21v141x->writesize, wb->buf, wb->dmah);
+}
+
+static void xr21v141x_read_buffers_free(struct xr21v141x *xr21v141x)
+{
+ struct usb_device *usb_dev = interface_to_usbdev(xr21v141x->control);
+ int i;
+
+ for (i = 0; i < xr21v141x->rx_buflimit; i++)
+ usb_free_coherent(usb_dev, xr21v141x->readsize,
+ xr21v141x->read_buffers[i].base, xr21v141x->read_buffers[i].dma);
+}
+
+/* Little helper: write buffers allocate */
+static int xr21v141x_write_buffers_alloc(struct xr21v141x *xr21v141x)
+{
+ int i;
+ struct xr21v141x_wb *wb;
+
+ for (wb = &xr21v141x->wb[0], i = 0; i < ACM_NW; i++, wb++) {
+ wb->buf = usb_alloc_coherent(xr21v141x->dev, xr21v141x->writesize, GFP_KERNEL,
+ &wb->dmah);
+ if (!wb->buf) {
+ while (i != 0) {
+ --i;
+ --wb;
+ usb_free_coherent(xr21v141x->dev, xr21v141x->writesize,
+ wb->buf, wb->dmah);
+ }
+ return -ENOMEM;
+ }
+ }
+ return 0;
+}
+
+static int xr21v141x_probe(struct usb_interface *intf,
+ const struct usb_device_id *id)
+{
+ struct usb_cdc_union_desc *union_header = NULL;
+ struct usb_cdc_country_functional_desc *cfd = NULL;
+ unsigned char *buffer = intf->altsetting->extra;
+ int buflen = intf->altsetting->extralen;
+ struct usb_interface *control_interface;
+ struct usb_interface *data_interface;
+ struct usb_endpoint_descriptor *epctrl = NULL;
+ struct usb_endpoint_descriptor *epread = NULL;
+ struct usb_endpoint_descriptor *epwrite = NULL;
+ struct usb_device *usb_dev = interface_to_usbdev(intf);
+ struct xr21v141x *xr21v141x;
+ int minor;
+ int ctrlsize, readsize;
+ u8 *buf;
+ u8 ac_management_function = 0;
+ u8 call_management_function = 0;
+ int call_interface_num = -1;
+ int data_interface_num = -1;
+ unsigned long quirks;
+ int num_rx_buf;
+ int i;
+ int combined_interfaces = 0;
+
+ /* normal quirks */
+ quirks = (unsigned long)id->driver_info;
+ num_rx_buf = ACM_NR;
+
+ /* normal probing*/
+ if (!buffer) {
+ dev_err(&intf->dev, "Weird descriptor references\n");
+ return -EINVAL;
+ }
+
+ if (!buflen) {
+ if (intf->cur_altsetting->endpoint &&
+ intf->cur_altsetting->endpoint->extralen &&
+ intf->cur_altsetting->endpoint->extra) {
+ dev_dbg(&intf->dev,
+ "Seeking extra descriptors on endpoint\n");
+ buflen = intf->cur_altsetting->endpoint->extralen;
+ buffer = intf->cur_altsetting->endpoint->extra;
+ } else {
+ dev_err(&intf->dev,
+ "Zero length descriptor references\n");
+ return -EINVAL;
+ }
+ }
+
+ while (buflen > 0) {
+ if (buffer[1] != USB_DT_CS_INTERFACE) {
+ dev_err(&intf->dev, "skipping garbage\n");
+ goto next_desc;
+ }
+
+ switch (buffer[2]) {
+ case USB_CDC_UNION_TYPE: /* we've found it */
+ if (union_header) {
+ dev_err(&intf->dev, "More than one "
+ "union descriptor, skipping ...\n");
+ goto next_desc;
+ }
+ union_header = (struct usb_cdc_union_desc *)buffer;
+ break;
+ case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/
+ cfd = (struct usb_cdc_country_functional_desc *)buffer;
+ break;
+ case USB_CDC_HEADER_TYPE: /* maybe check version */
+ break; /* for now we ignore it */
+ case USB_CDC_ACM_TYPE:
+ ac_management_function = buffer[3];
+ break;
+ case USB_CDC_CALL_MANAGEMENT_TYPE:
+ call_management_function = buffer[3];
+ call_interface_num = buffer[4];
+ if ((quirks & NOT_A_MODEM) == 0 && (call_management_function & 3) != 3)
+ dev_err(&intf->dev, "This device cannot do calls on its own. It is not a modem.\n");
+ break;
+ default:
+ /* there are LOTS more CDC descriptors that
+ * could legitimately be found here.
+ */
+ dev_dbg(&intf->dev, "Ignoring descriptor: "
+ "type %02x, length %d\n",
+ buffer[2], buffer[0]);
+ break;
+ }
+next_desc:
+ buflen -= buffer[0];
+ buffer += buffer[0];
+ }
+
+ if (!union_header) {
+ if (call_interface_num > 0) {
+ dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");
+ /* quirks for Droids MuIn LCD */
+ if (quirks & NO_DATA_INTERFACE)
+ data_interface = usb_ifnum_to_if(usb_dev, 0);
+ else
+ data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num));
+ control_interface = intf;
+ } else {
+ if (intf->cur_altsetting->desc.bNumEndpoints != 3) {
+ dev_dbg(&intf->dev,"No union descriptor, giving up\n");
+ return -ENODEV;
+ } else {
+ dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n");
+ combined_interfaces = 1;
+ control_interface = data_interface = intf;
+ goto look_for_collapsed_interface;
+ }
+ }
+ } else {
+ control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
+ data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0));
+ if (!control_interface || !data_interface) {
+ dev_dbg(&intf->dev, "no interfaces\n");
+ return -ENODEV;
+ }
+ }
+
+ if (data_interface_num != call_interface_num)
+ dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n");
+
+ if (control_interface == data_interface) {
+ /* some broken devices designed for windows work this way */
+ dev_warn(&intf->dev,"Control and data interfaces are not separated!\n");
+ combined_interfaces = 1;
+ /* a popular other OS doesn't use it */
+ quirks |= NO_CAP_LINE;
+ if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) {
+ dev_err(&intf->dev, "This needs exactly 3 endpoints\n");
+ return -EINVAL;
+ }
+look_for_collapsed_interface:
+ for (i = 0; i < 3; i++) {
+ struct usb_endpoint_descriptor *ep;
+ ep = &data_interface->cur_altsetting->endpoint[i].desc;
+
+ if (usb_endpoint_is_int_in(ep))
+ epctrl = ep;
+ else if (usb_endpoint_is_bulk_out(ep))
+ epwrite = ep;
+ else if (usb_endpoint_is_bulk_in(ep))
+ epread = ep;
+ else
+ return -EINVAL;
+ }
+ if (!epctrl || !epread || !epwrite)
+ return -ENODEV;
+ else
+ goto made_compressed_probe;
+ }
+
+ /*workaround for switched interfaces */
+ if (data_interface->cur_altsetting->desc.bInterfaceClass
+ != CDC_DATA_INTERFACE_TYPE) {
+ if (control_interface->cur_altsetting->desc.bInterfaceClass
+ == CDC_DATA_INTERFACE_TYPE) {
+ struct usb_interface *t;
+ dev_dbg(&intf->dev,
+ "Your device has switched interfaces.\n");
+ t = control_interface;
+ control_interface = data_interface;
+ data_interface = t;
+ } else {
+ return -EINVAL;
+ }
+ }
+
+ /* Accept probe requests only for the control interface */
+ if (!combined_interfaces && intf != control_interface)
+ return -ENODEV;
+
+ if (!combined_interfaces && usb_interface_claimed(data_interface)) {
+ /* valid in this context */
+ dev_dbg(&intf->dev, "The data interface isn't available\n");
+ return -EBUSY;
+ }
+
+
+ if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 ||
+ control_interface->cur_altsetting->desc.bNumEndpoints == 0)
+ return -EINVAL;
+
+ epctrl = &control_interface->cur_altsetting->endpoint[0].desc;
+ epread = &data_interface->cur_altsetting->endpoint[0].desc;
+ epwrite = &data_interface->cur_altsetting->endpoint[1].desc;
+
+
+ /* workaround for switched endpoints */
+ if (!usb_endpoint_dir_in(epread)) {
+ /* descriptors are swapped */
+ struct usb_endpoint_descriptor *t;
+ //dev_dbg(&intf->dev,
+ // "The data interface has switched endpoints\n");
+ t = epread;
+ epread = epwrite;
+ epwrite = t;
+ }
+made_compressed_probe:
+ dev_dbg(&intf->dev, "interfaces are valid\n");
+
+ xr21v141x = kzalloc(sizeof(struct xr21v141x), GFP_KERNEL);
+ if (xr21v141x == NULL) {
+ dev_err(&intf->dev, "out of memory (xr21v141x kzalloc)\n");
+ goto alloc_fail;
+ }
+
+ minor = xr21v141x_alloc_minor(xr21v141x);
+ if (minor == XR21V141X_TTY_MINORS) {
+ dev_err(&intf->dev, "no more free xr21v141x devices\n");
+ kfree(xr21v141x);
+ return -ENODEV;
+ }
+
+ ctrlsize = usb_endpoint_maxp(epctrl);
+ readsize = usb_endpoint_maxp(epread) *
+ (quirks == SINGLE_RX_URB ? 1 : 2);
+ xr21v141x->combined_interfaces = combined_interfaces;
+ xr21v141x->writesize = usb_endpoint_maxp(epwrite) * 20;
+ xr21v141x->control = control_interface;
+ xr21v141x->data = data_interface;
+ xr21v141x->minor = minor;
+ xr21v141x->dev = usb_dev;
+ xr21v141x->ctrl_caps = ac_management_function;
+ if (quirks & NO_CAP_LINE)
+ xr21v141x->ctrl_caps &= ~USB_CDC_CAP_LINE;
+ xr21v141x->ctrlsize = ctrlsize;
+ xr21v141x->readsize = readsize;
+ xr21v141x->rx_buflimit = num_rx_buf;
+ INIT_WORK(&xr21v141x->work, xr21v141x_softint);
+ spin_lock_init(&xr21v141x->write_lock);
+ spin_lock_init(&xr21v141x->read_lock);
+ mutex_init(&xr21v141x->mutex);
+ xr21v141x->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress);
+ xr21v141x->is_int_ep = usb_endpoint_xfer_int(epread);
+ if (xr21v141x->is_int_ep)
+ xr21v141x->bInterval = epread->bInterval;
+ tty_port_init(&xr21v141x->port);
+ xr21v141x->port.ops = &xr21v141x_port_ops;
+
+ xr21v141x->block = epwrite->bEndpointAddress - 1;
+
+ buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &xr21v141x->ctrl_dma);
+ if (!buf) {
+ dev_err(&intf->dev, "out of memory (ctrl buffer alloc)\n");
+ goto alloc_fail2;
+ }
+ xr21v141x->ctrl_buffer = buf;
+
+ if (xr21v141x_write_buffers_alloc(xr21v141x) < 0) {
+ dev_err(&intf->dev, "out of memory (write buffer alloc)\n");
+ goto alloc_fail4;
+ }
+
+ xr21v141x->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!xr21v141x->ctrlurb) {
+ dev_err(&intf->dev, "out of memory (ctrlurb kmalloc)\n");
+ goto alloc_fail5;
+ }
+ for (i = 0; i < num_rx_buf; i++) {
+ struct xr21v141x_rb *rb = &(xr21v141x->read_buffers[i]);
+ struct urb *urb;
+
+ rb->base = usb_alloc_coherent(xr21v141x->dev, readsize, GFP_KERNEL,
+ &rb->dma);
+ if (!rb->base) {
+ dev_err(&intf->dev, "out of memory "
+ "(read bufs usb_alloc_coherent)\n");
+ goto alloc_fail6;
+ }
+ rb->index = i;
+ rb->instance = xr21v141x;
+
+ urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!urb) {
+ dev_err(&intf->dev,
+ "out of memory (read urbs usb_alloc_urb)\n");
+ goto alloc_fail6;
+ }
+ urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+ urb->transfer_dma = rb->dma;
+ if (xr21v141x->is_int_ep) {
+ usb_fill_int_urb(urb, xr21v141x->dev,
+ xr21v141x->rx_endpoint,
+ rb->base,
+ xr21v141x->readsize,
+ xr21v141x_read_bulk_callback, rb,
+ xr21v141x->bInterval);
+ } else {
+ usb_fill_bulk_urb(urb, xr21v141x->dev,
+ xr21v141x->rx_endpoint,
+ rb->base,
+ xr21v141x->readsize,
+ xr21v141x_read_bulk_callback, rb);
+ }
+
+ xr21v141x->read_urbs[i] = urb;
+ __set_bit(i, &xr21v141x->read_urbs_free);
+ }
+ for (i = 0; i < ACM_NW; i++) {
+ struct xr21v141x_wb *snd = &(xr21v141x->wb[i]);
+
+ snd->urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (snd->urb == NULL) {
+ dev_err(&intf->dev,
+ "out of memory (write urbs usb_alloc_urb)\n");
+ goto alloc_fail7;
+ }
+
+ if (usb_endpoint_xfer_int(epwrite))
+ usb_fill_int_urb(snd->urb, usb_dev,
+ usb_sndintpipe(usb_dev, epwrite->bEndpointAddress),
+ NULL, xr21v141x->writesize, xr21v141x_write_bulk, snd, epwrite->bInterval);
+ else
+ usb_fill_bulk_urb(snd->urb, usb_dev,
+ usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress),
+ NULL, xr21v141x->writesize, xr21v141x_write_bulk, snd);
+ snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+ snd->instance = xr21v141x;
+ }
+
+ usb_set_intfdata(intf, xr21v141x);
+
+ i = device_create_file(&intf->dev, &dev_attr_bmCapabilities);
+ if (i < 0)
+ goto alloc_fail7;
+
+ if (cfd) { /* export the country data */
+ xr21v141x->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL);
+ if (!xr21v141x->country_codes)
+ goto skip_countries;
+ xr21v141x->country_code_size = cfd->bLength - 4;
+ memcpy(xr21v141x->country_codes, (u8 *)&cfd->wCountyCode0,
+ cfd->bLength - 4);
+ xr21v141x->country_rel_date = cfd->iCountryCodeRelDate;
+
+ i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);
+ if (i < 0) {
+ kfree(xr21v141x->country_codes);
+ xr21v141x->country_codes = NULL;
+ xr21v141x->country_code_size = 0;
+ goto skip_countries;
+ }
+
+ i = device_create_file(&intf->dev,
+ &dev_attr_iCountryCodeRelDate);
+ if (i < 0) {
+ device_remove_file(&intf->dev, &dev_attr_wCountryCodes);
+ kfree(xr21v141x->country_codes);
+ xr21v141x->country_codes = NULL;
+ xr21v141x->country_code_size = 0;
+ goto skip_countries;
+ }
+ }
+
+skip_countries:
+ usb_fill_int_urb(xr21v141x->ctrlurb, usb_dev,
+ usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress),
+ xr21v141x->ctrl_buffer, ctrlsize, xr21v141x_ctrl_irq, xr21v141x,
+ /* works around buggy devices */
+ epctrl->bInterval ? epctrl->bInterval : 0xff);
+ xr21v141x->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+ xr21v141x->ctrlurb->transfer_dma = xr21v141x->ctrl_dma;
+
+ dev_info(&intf->dev, "ttyUSB%d: XR21v14x usb uart device\n", minor);
+
+ xr21v141x_set_control(xr21v141x, xr21v141x->ctrlout);
+
+ xr21v141x->line.dwDTERate = cpu_to_le32(9600);
+ xr21v141x->line.bDataBits = 8;
+ xr21v141x_set_line(xr21v141x, &xr21v141x->line);
+
+ usb_driver_claim_interface(&xr21v141x_driver, data_interface, xr21v141x);
+ usb_set_intfdata(data_interface, xr21v141x);
+
+ usb_get_intf(control_interface);
+ tty_register_device(xr21v141x_tty_driver, minor, &control_interface->dev);
+
+ return 0;
+alloc_fail7:
+ for (i = 0; i < ACM_NW; i++)
+ usb_free_urb(xr21v141x->wb[i].urb);
+alloc_fail6:
+ for (i = 0; i < num_rx_buf; i++)
+ usb_free_urb(xr21v141x->read_urbs[i]);
+ xr21v141x_read_buffers_free(xr21v141x);
+ usb_free_urb(xr21v141x->ctrlurb);
+alloc_fail5:
+ xr21v141x_write_buffers_free(xr21v141x);
+alloc_fail4:
+ usb_free_coherent(usb_dev, ctrlsize, xr21v141x->ctrl_buffer, xr21v141x->ctrl_dma);
+alloc_fail2:
+ xr21v141x_release_minor(xr21v141x);
+ kfree(xr21v141x);
+alloc_fail:
+ return -ENOMEM;
+}
+
+static void stop_data_traffic(struct xr21v141x *xr21v141x)
+{
+ int i;
+
+ dev_dbg(&xr21v141x->control->dev, "%s\n", __func__);
+
+ usb_kill_urb(xr21v141x->ctrlurb);
+ for (i = 0; i < ACM_NW; i++)
+ usb_kill_urb(xr21v141x->wb[i].urb);
+ for (i = 0; i < xr21v141x->rx_buflimit; i++)
+ usb_kill_urb(xr21v141x->read_urbs[i]);
+
+ cancel_work_sync(&xr21v141x->work);
+}
+
+static void xr21v141x_disconnect(struct usb_interface *intf)
+{
+ struct xr21v141x *xr21v141x = usb_get_intfdata(intf);
+ struct usb_device *usb_dev = interface_to_usbdev(intf);
+ struct tty_struct *tty;
+ int i;
+
+ dev_dbg(&intf->dev, "%s\n", __func__);
+
+ /* sibling interface is already cleaning up */
+ if (!xr21v141x)
+ return;
+
+ mutex_lock(&xr21v141x->mutex);
+ xr21v141x->disconnected = true;
+ if (xr21v141x->country_codes) {
+ device_remove_file(&xr21v141x->control->dev,
+ &dev_attr_wCountryCodes);
+ device_remove_file(&xr21v141x->control->dev,
+ &dev_attr_iCountryCodeRelDate);
+ }
+ device_remove_file(&xr21v141x->control->dev, &dev_attr_bmCapabilities);
+ usb_set_intfdata(xr21v141x->control, NULL);
+ usb_set_intfdata(xr21v141x->data, NULL);
+ mutex_unlock(&xr21v141x->mutex);
+
+ tty = tty_port_tty_get(&xr21v141x->port);
+ if (tty) {
+ tty_vhangup(tty);
+ tty_kref_put(tty);
+ }
+
+ stop_data_traffic(xr21v141x);
+
+ usb_free_urb(xr21v141x->ctrlurb);
+ for (i = 0; i < ACM_NW; i++)
+ usb_free_urb(xr21v141x->wb[i].urb);
+ for (i = 0; i < xr21v141x->rx_buflimit; i++)
+ usb_free_urb(xr21v141x->read_urbs[i]);
+ xr21v141x_write_buffers_free(xr21v141x);
+ usb_free_coherent(usb_dev, xr21v141x->ctrlsize, xr21v141x->ctrl_buffer, xr21v141x->ctrl_dma);
+ xr21v141x_read_buffers_free(xr21v141x);
+
+ if (!xr21v141x->combined_interfaces)
+ usb_driver_release_interface(&xr21v141x_driver, intf == xr21v141x->control ?
+ xr21v141x->data : xr21v141x->control);
+
+ tty_port_put(&xr21v141x->port);
+}
+
+#ifdef CONFIG_PM
+static int xr21v141x_suspend(struct usb_interface *intf, pm_message_t message)
+{
+ struct xr21v141x *xr21v141x = usb_get_intfdata(intf);
+ int cnt;
+
+ if (PMSG_IS_AUTO(message)) {
+ int b;
+
+ spin_lock_irq(&xr21v141x->write_lock);
+ b = xr21v141x->transmitting;
+ spin_unlock_irq(&xr21v141x->write_lock);
+ if (b)
+ return -EBUSY;
+ }
+
+ spin_lock_irq(&xr21v141x->read_lock);
+ spin_lock(&xr21v141x->write_lock);
+ cnt = xr21v141x->susp_count++;
+ spin_unlock(&xr21v141x->write_lock);
+ spin_unlock_irq(&xr21v141x->read_lock);
+
+ if (cnt)
+ return 0;
+
+ if (test_bit(ASYNCB_INITIALIZED, &xr21v141x->port.flags))
+ stop_data_traffic(xr21v141x);
+
+ return 0;
+}
+
+static int xr21v141x_resume(struct usb_interface *intf)
+{
+ struct xr21v141x *xr21v141x = usb_get_intfdata(intf);
+ struct xr21v141x_wb *wb;
+ int rv = 0;
+ int cnt;
+
+ spin_lock_irq(&xr21v141x->read_lock);
+ xr21v141x->susp_count -= 1;
+ cnt = xr21v141x->susp_count;
+ spin_unlock_irq(&xr21v141x->read_lock);
+
+ if (cnt)
+ return 0;
+
+ if (test_bit(ASYNCB_INITIALIZED, &xr21v141x->port.flags)) {
+ rv = usb_submit_urb(xr21v141x->ctrlurb, GFP_NOIO);
+
+ spin_lock_irq(&xr21v141x->write_lock);
+ if (xr21v141x->delayed_wb) {
+ wb = xr21v141x->delayed_wb;
+ xr21v141x->delayed_wb = NULL;
+ spin_unlock_irq(&xr21v141x->write_lock);
+ xr21v141x_start_wb(xr21v141x, wb);
+ } else {
+ spin_unlock_irq(&xr21v141x->write_lock);
+ }
+
+ /*
+ * delayed error checking because we must
+ * do the write path at all cost
+ */
+ if (rv < 0)
+ goto err_out;
+
+ rv = xr21v141x_submit_read_urbs(xr21v141x, GFP_NOIO);
+ }
+
+err_out:
+ return rv;
+}
+
+static int xr21v141x_reset_resume(struct usb_interface *intf)
+{
+ struct xr21v141x *xr21v141x = usb_get_intfdata(intf);
+ struct tty_struct *tty;
+
+ if (test_bit(ASYNCB_INITIALIZED, &xr21v141x->port.flags)) {
+ tty = tty_port_tty_get(&xr21v141x->port);
+ if (tty) {
+ tty_hangup(tty);
+ tty_kref_put(tty);
+ }
+ }
+
+ return xr21v141x_resume(intf);
+}
+
+#endif /* CONFIG_PM */
+
+/*
+ * USB driver structure.
+ */
+
+static const struct usb_device_id xrusb_ids[] = {
+ { USB_DEVICE(0x04e2, 0x1410),
+ },
+ { USB_DEVICE(0x04e2, 0x1412),
+ },
+ { USB_DEVICE(0x04e2, 0x1414),
+ },
+ { }
+};
+
+MODULE_DEVICE_TABLE(usb, xrusb_ids);
+
+static struct usb_driver xr21v141x_driver = {
+ .name = "vizzini",
+ .probe = xr21v141x_probe,
+ .disconnect = xr21v141x_disconnect,
+#ifdef CONFIG_PM
+ .suspend = xr21v141x_suspend,
+ .resume = xr21v141x_resume,
+ .reset_resume = xr21v141x_reset_resume,
+#endif
+ .id_table = xrusb_ids,
+#ifdef CONFIG_PM
+ .supports_autosuspend = 1,
+#endif
+ .disable_hub_initiated_lpm = 1,
+};
+
+/*
+ * TTY driver structures.
+ */
+
+static const struct tty_operations xr21v141x_ops = {
+ .install = xr21v141x_tty_install,
+ .open = xr21v141x_tty_open,
+ .close = xr21v141x_tty_close,
+ .cleanup = xr21v141x_tty_cleanup,
+ .hangup = xr21v141x_tty_hangup,
+ .write = xr21v141x_tty_write,
+ .write_room = xr21v141x_tty_write_room,
+ .ioctl = xr21v141x_tty_ioctl,
+ .throttle = xr21v141x_tty_throttle,
+ .unthrottle = xr21v141x_tty_unthrottle,
+ .chars_in_buffer = xr21v141x_tty_chars_in_buffer,
+ .break_ctl = xr21v141x_tty_break_ctl,
+ .set_termios = xr21v141x_tty_set_termios,
+ .tiocmget = xr21v141x_tty_tiocmget,
+ .tiocmset = xr21v141x_tty_tiocmset,
+};
+
+/*
+ * Init / exit.
+ */
+
+static int __init xr21v141x_init(void)
+{
+ int retval;
+ xr21v141x_tty_driver = alloc_tty_driver(XR21V141X_TTY_MINORS);
+ if (!xr21v141x_tty_driver)
+ return -ENOMEM;
+ xr21v141x_tty_driver->driver_name = "vizzini",
+ xr21v141x_tty_driver->name = "ttyUSB",
+ xr21v141x_tty_driver->major = XR21V141X_TTY_MAJOR,
+ xr21v141x_tty_driver->minor_start = 0,
+ xr21v141x_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
+ xr21v141x_tty_driver->subtype = SERIAL_TYPE_NORMAL,
+ xr21v141x_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
+ xr21v141x_tty_driver->init_termios = tty_std_termios;
+ xr21v141x_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
+ HUPCL | CLOCAL;
+ tty_set_operations(xr21v141x_tty_driver, &xr21v141x_ops);
+
+ retval = tty_register_driver(xr21v141x_tty_driver);
+ if (retval) {
+ put_tty_driver(xr21v141x_tty_driver);
+ return retval;
+ }
+
+ retval = usb_register(&xr21v141x_driver);
+ if (retval) {
+ tty_unregister_driver(xr21v141x_tty_driver);
+ put_tty_driver(xr21v141x_tty_driver);
+ return retval;
+ }
+
+ printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
+
+ return 0;
+}
+
+static void __exit xr21v141x_exit(void)
+{
+ usb_deregister(&xr21v141x_driver);
+ tty_unregister_driver(xr21v141x_tty_driver);
+ put_tty_driver(xr21v141x_tty_driver);
+}
+
+module_init(xr21v141x_init);
+module_exit(xr21v141x_exit);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR);
projects / exar-uart-driver.git / commitdiff