4 * Copyright (c) 2013 Exar Corporation, Inc.
8 * v1.0- Support for Kernel 3.5 and newer,
9 * based on cdc-acm.c sample of 3.6 kernel.
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
32 #include <linux/kernel.h>
33 #include <linux/errno.h>
34 #include <linux/init.h>
35 #include <linux/slab.h>
36 #include <linux/tty.h>
37 #include <linux/serial.h>
38 #include <linux/tty_driver.h>
39 #include <linux/tty_flip.h>
40 #include <linux/serial.h>
41 #include <linux/module.h>
42 #include <linux/mutex.h>
43 #include <linux/uaccess.h>
44 #include <linux/usb.h>
45 #include <linux/usb/cdc.h>
46 #include <asm/byteorder.h>
47 #include <asm/unaligned.h>
48 #include <linux/list.h>
53 #define DRIVER_AUTHOR "Ravi Reddy"
54 #define DRIVER_DESC "Exar USB UART Driver for XR21V141x "
56 static struct usb_driver xr21v141x_driver;
57 static struct tty_driver *xr21v141x_tty_driver;
58 static struct xr21v141x *xr21v141x_table[XR21V141X_TTY_MINORS];
60 static DEFINE_MUTEX(xr21v141x_table_lock);
63 * Functions for ACM control messages.
66 static int xr21v141x_ctrl_msg(struct xr21v141x *xr21v141x, int request, int value,
69 int retval = usb_control_msg(xr21v141x->dev, usb_sndctrlpipe(xr21v141x->dev, 0),
70 request, USB_RT_ACM, value,
71 xr21v141x->control->altsetting[0].desc.bInterfaceNumber,
73 dev_dbg(&xr21v141x->control->dev,
74 "%s - rq 0x%02x, val %#x, len %#x, result %d\n",
75 __func__, request, value, len, retval);
76 return retval < 0 ? retval : 0;
79 #define xr21v141x_set_control(xr21v141x, control) \
80 xr21v141x_ctrl_msg(xr21v141x, USB_CDC_REQ_SET_CONTROL_LINE_STATE, control, NULL, 0)
81 #define xr21v141x_set_line(xr21v141x, line) \
82 xr21v141x_ctrl_msg(xr21v141x, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line))
83 #define xr21v141x_send_break(xr21v141x, ms) \
84 xr21v141x_ctrl_msg(xr21v141x, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0)
87 * Write buffer management.
88 * All of these assume proper locks taken by the caller.
91 static int xr21v141x_wb_alloc(struct xr21v141x *xr21v141x)
94 struct xr21v141x_wb *wb;
99 wb = &xr21v141x->wb[wbn];
104 wbn = (wbn + 1) % ACM_NW;
110 static int xr21v141x_wb_is_avail(struct xr21v141x *xr21v141x)
116 spin_lock_irqsave(&xr21v141x->write_lock, flags);
117 for (i = 0; i < ACM_NW; i++)
118 n -= xr21v141x->wb[i].use;
119 spin_unlock_irqrestore(&xr21v141x->write_lock, flags);
124 * Finish write. Caller must hold xr21v141x->write_lock
126 static void xr21v141x_write_done(struct xr21v141x *xr21v141x, struct xr21v141x_wb *wb)
129 xr21v141x->transmitting--;
130 usb_autopm_put_interface_async(xr21v141x->control);
136 * the caller is responsible for locking
139 static int xr21v141x_start_wb(struct xr21v141x *xr21v141x, struct xr21v141x_wb *wb)
143 xr21v141x->transmitting++;
145 wb->urb->transfer_buffer = wb->buf;
146 wb->urb->transfer_dma = wb->dmah;
147 wb->urb->transfer_buffer_length = wb->len;
148 wb->urb->dev = xr21v141x->dev;
150 rc = usb_submit_urb(wb->urb, GFP_ATOMIC);
152 dev_err(&xr21v141x->data->dev,
153 "%s - usb_submit_urb(write bulk) failed: %d\n",
155 xr21v141x_write_done(xr21v141x, wb);
161 * attributes exported through sysfs
163 static ssize_t show_caps
164 (struct device *dev, struct device_attribute *attr, char *buf)
166 struct usb_interface *intf = to_usb_interface(dev);
167 struct xr21v141x *xr21v141x = usb_get_intfdata(intf);
169 return sprintf(buf, "%d", xr21v141x->ctrl_caps);
171 static DEVICE_ATTR(bmCapabilities, S_IRUGO, show_caps, NULL);
173 static ssize_t show_country_codes
174 (struct device *dev, struct device_attribute *attr, char *buf)
176 struct usb_interface *intf = to_usb_interface(dev);
177 struct xr21v141x *xr21v141x = usb_get_intfdata(intf);
179 memcpy(buf, xr21v141x->country_codes, xr21v141x->country_code_size);
180 return xr21v141x->country_code_size;
183 static DEVICE_ATTR(wCountryCodes, S_IRUGO, show_country_codes, NULL);
185 static ssize_t show_country_rel_date
186 (struct device *dev, struct device_attribute *attr, char *buf)
188 struct usb_interface *intf = to_usb_interface(dev);
189 struct xr21v141x *xr21v141x = usb_get_intfdata(intf);
191 return sprintf(buf, "%d", xr21v141x->country_rel_date);
194 static DEVICE_ATTR(iCountryCodeRelDate, S_IRUGO, show_country_rel_date, NULL);
196 * Interrupt handlers for various ACM device responses
199 /* control interface reports status changes with "interrupt" transfers */
200 static void xr21v141x_ctrl_irq(struct urb *urb)
202 struct xr21v141x *xr21v141x = urb->context;
203 struct usb_cdc_notification *dr = urb->transfer_buffer;
207 int status = urb->status;
216 /* this urb is terminated, clean up */
217 dev_dbg(&xr21v141x->control->dev,
218 "%s - urb shutting down with status: %d\n",
222 dev_dbg(&xr21v141x->control->dev,
223 "%s - nonzero urb status received: %d\n",
228 usb_mark_last_busy(xr21v141x->dev);
230 data = (unsigned char *)(dr + 1);
231 switch (dr->bNotificationType) {
232 case USB_CDC_NOTIFY_NETWORK_CONNECTION:
233 dev_dbg(&xr21v141x->control->dev, "%s - network connection: %d\n",
234 __func__, dr->wValue);
237 case USB_CDC_NOTIFY_SERIAL_STATE:
238 newctrl = get_unaligned_le16(data);
240 if (!xr21v141x->clocal && (xr21v141x->ctrlin & ~newctrl & ACM_CTRL_DCD)) {
241 dev_dbg(&xr21v141x->control->dev,
242 "%s - calling hangup\n", __func__);
243 tty_port_tty_hangup(&xr21v141x->port, false);
246 xr21v141x->ctrlin = newctrl;
248 dev_dbg(&xr21v141x->control->dev,
249 "%s - input control lines: dcd%c dsr%c break%c "
250 "ring%c framing%c parity%c overrun%c\n",
252 xr21v141x->ctrlin & ACM_CTRL_DCD ? '+' : '-',
253 xr21v141x->ctrlin & ACM_CTRL_DSR ? '+' : '-',
254 xr21v141x->ctrlin & ACM_CTRL_BRK ? '+' : '-',
255 xr21v141x->ctrlin & ACM_CTRL_RI ? '+' : '-',
256 xr21v141x->ctrlin & ACM_CTRL_FRAMING ? '+' : '-',
257 xr21v141x->ctrlin & ACM_CTRL_PARITY ? '+' : '-',
258 xr21v141x->ctrlin & ACM_CTRL_OVERRUN ? '+' : '-');
262 dev_dbg(&xr21v141x->control->dev,
263 "%s - unknown notification %d received: index %d "
264 "len %d data0 %d data1 %d\n",
266 dr->bNotificationType, dr->wIndex,
267 dr->wLength, data[0], data[1]);
271 retval = usb_submit_urb(urb, GFP_ATOMIC);
273 dev_err(&xr21v141x->control->dev, "%s - usb_submit_urb failed: %d\n",
277 static int xr21v141x_submit_read_urb(struct xr21v141x *xr21v141x, int index, gfp_t mem_flags)
281 if (!test_and_clear_bit(index, &xr21v141x->read_urbs_free))
284 dev_vdbg(&xr21v141x->data->dev, "%s - urb %d\n", __func__, index);
286 res = usb_submit_urb(xr21v141x->read_urbs[index], mem_flags);
289 dev_err(&xr21v141x->data->dev,
290 "%s - usb_submit_urb failed: %d\n",
293 set_bit(index, &xr21v141x->read_urbs_free);
300 static int xr21v141x_submit_read_urbs(struct xr21v141x *xr21v141x, gfp_t mem_flags)
305 for (i = 0; i < xr21v141x->rx_buflimit; ++i) {
306 res = xr21v141x_submit_read_urb(xr21v141x, i, mem_flags);
314 static void xr21v141x_process_read_urb(struct xr21v141x *xr21v141x, struct urb *urb)
316 if (!urb->actual_length)
319 tty_insert_flip_string(&xr21v141x->port, urb->transfer_buffer, urb->actual_length);
320 tty_flip_buffer_push(&xr21v141x->port);
323 static void xr21v141x_read_bulk_callback(struct urb *urb)
325 struct xr21v141x_rb *rb = urb->context;
326 struct xr21v141x *xr21v141x = rb->instance;
329 dev_vdbg(&xr21v141x->data->dev, "%s - urb %d, len %d\n", __func__,
330 rb->index, urb->actual_length);
331 set_bit(rb->index, &xr21v141x->read_urbs_free);
333 if (!xr21v141x->dev) {
334 dev_dbg(&xr21v141x->data->dev, "%s - disconnected\n", __func__);
337 usb_mark_last_busy(xr21v141x->dev);
340 dev_dbg(&xr21v141x->data->dev, "%s - non-zero urb status: %d\n",
341 __func__, urb->status);
344 xr21v141x_process_read_urb(xr21v141x, urb);
346 /* throttle device if requested by tty */
347 spin_lock_irqsave(&xr21v141x->read_lock, flags);
348 xr21v141x->throttled = xr21v141x->throttle_req;
349 if (!xr21v141x->throttled && !xr21v141x->susp_count) {
350 spin_unlock_irqrestore(&xr21v141x->read_lock, flags);
351 xr21v141x_submit_read_urb(xr21v141x, rb->index, GFP_ATOMIC);
353 spin_unlock_irqrestore(&xr21v141x->read_lock, flags);
357 /* data interface wrote those outgoing bytes */
358 static void xr21v141x_write_bulk(struct urb *urb)
360 struct xr21v141x_wb *wb = urb->context;
361 struct xr21v141x *xr21v141x = wb->instance;
364 if (urb->status || (urb->actual_length != urb->transfer_buffer_length))
365 dev_vdbg(&xr21v141x->data->dev, "%s - len %d/%d, status %d\n",
368 urb->transfer_buffer_length,
371 spin_lock_irqsave(&xr21v141x->write_lock, flags);
372 xr21v141x_write_done(xr21v141x, wb);
373 spin_unlock_irqrestore(&xr21v141x->write_lock, flags);
374 schedule_work(&xr21v141x->work);
377 static void xr21v141x_softint(struct work_struct *work)
379 struct xr21v141x *xr21v141x = container_of(work, struct xr21v141x, work);
381 dev_vdbg(&xr21v141x->data->dev, "%s\n", __func__);
383 tty_port_tty_wakeup(&xr21v141x->port);
390 static struct xr21v141x *xr21v141x_get_by_index(unsigned index)
392 struct xr21v141x *xr21v141x;
394 mutex_lock(&xr21v141x_table_lock);
395 xr21v141x = xr21v141x_table[index];
397 mutex_lock(&xr21v141x->mutex);
398 if (xr21v141x->disconnected) {
399 mutex_unlock(&xr21v141x->mutex);
402 tty_port_get(&xr21v141x->port);
403 mutex_unlock(&xr21v141x->mutex);
406 mutex_unlock(&xr21v141x_table_lock);
411 * Try to find an available minor number and if found, associate it with 'xr21v141x'.
413 static int xr21v141x_alloc_minor(struct xr21v141x *xr21v141x)
417 mutex_lock(&xr21v141x_table_lock);
418 for (minor = 0; minor < XR21V141X_TTY_MINORS; minor++) {
419 if (!xr21v141x_table[minor]) {
420 xr21v141x_table[minor] = xr21v141x;
424 mutex_unlock(&xr21v141x_table_lock);
429 /* Release the minor number associated with 'xr21v141x'. */
430 static void xr21v141x_release_minor(struct xr21v141x *xr21v141x)
432 mutex_lock(&xr21v141x_table_lock);
433 xr21v141x_table[xr21v141x->minor] = NULL;
434 mutex_unlock(&xr21v141x_table_lock);
437 static int xr21v141x_tty_install(struct tty_driver *driver, struct tty_struct *tty)
439 struct xr21v141x *xr21v141x;
442 dev_dbg(tty->dev, "%s\n", __func__);
444 xr21v141x = xr21v141x_get_by_index(tty->index);
448 retval = tty_standard_install(driver, tty);
450 goto error_init_termios;
452 tty->driver_data = xr21v141x;
457 tty_port_put(&xr21v141x->port);
461 static int xr21v141x_tty_open(struct tty_struct *tty, struct file *filp)
463 struct xr21v141x *xr21v141x = tty->driver_data;
465 dev_dbg(tty->dev, "%s\n", __func__);
467 return tty_port_open(&xr21v141x->port, tty, filp);
470 static int xr21v141x_port_activate(struct tty_port *port, struct tty_struct *tty)
472 struct xr21v141x *xr21v141x = container_of(port, struct xr21v141x, port);
473 int retval = -ENODEV;
475 dev_dbg(&xr21v141x->control->dev, "%s\n", __func__);
477 mutex_lock(&xr21v141x->mutex);
478 if (xr21v141x->disconnected)
481 retval = usb_autopm_get_interface(xr21v141x->control);
483 goto error_get_interface;
485 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
486 xr21v141x->control->needs_remote_wakeup = 1;
488 xr21v141x->ctrlurb->dev = xr21v141x->dev;
489 if (usb_submit_urb(xr21v141x->ctrlurb, GFP_KERNEL)) {
490 dev_err(&xr21v141x->control->dev,
491 "%s - usb_submit_urb(ctrl irq) failed\n", __func__);
492 usb_autopm_put_interface(xr21v141x->control);
493 goto error_submit_urb;
496 xr21v141x->ctrlout = ACM_CTRL_DTR | ACM_CTRL_RTS;
497 if (xr21v141x_set_control(xr21v141x, xr21v141x->ctrlout) < 0 &&
498 (xr21v141x->ctrl_caps & USB_CDC_CAP_LINE)) {
499 usb_autopm_put_interface(xr21v141x->control);
500 goto error_set_control;
503 usb_autopm_put_interface(xr21v141x->control);
506 * Unthrottle device in case the TTY was closed while throttled.
508 spin_lock_irq(&xr21v141x->read_lock);
509 xr21v141x->throttled = 0;
510 xr21v141x->throttle_req = 0;
511 spin_unlock_irq(&xr21v141x->read_lock);
513 if (xr21v141x_submit_read_urbs(xr21v141x, GFP_KERNEL))
514 goto error_submit_read_urbs;
516 mutex_unlock(&xr21v141x->mutex);
520 error_submit_read_urbs:
521 xr21v141x->ctrlout = 0;
522 xr21v141x_set_control(xr21v141x, xr21v141x->ctrlout);
524 usb_kill_urb(xr21v141x->ctrlurb);
528 mutex_unlock(&xr21v141x->mutex);
532 static void xr21v141x_port_destruct(struct tty_port *port)
534 struct xr21v141x *xr21v141x = container_of(port, struct xr21v141x, port);
536 dev_dbg(&xr21v141x->control->dev, "%s\n", __func__);
538 xr21v141x_release_minor(xr21v141x);
539 usb_put_intf(xr21v141x->control);
540 kfree(xr21v141x->country_codes);
544 static void xr21v141x_port_shutdown(struct tty_port *port)
546 struct xr21v141x *xr21v141x = container_of(port, struct xr21v141x, port);
549 dev_dbg(&xr21v141x->control->dev, "%s\n", __func__);
551 mutex_lock(&xr21v141x->mutex);
552 if (!xr21v141x->disconnected) {
553 usb_autopm_get_interface(xr21v141x->control);
554 xr21v141x_set_control(xr21v141x, xr21v141x->ctrlout = 0);
555 usb_kill_urb(xr21v141x->ctrlurb);
556 for (i = 0; i < ACM_NW; i++)
557 usb_kill_urb(xr21v141x->wb[i].urb);
558 for (i = 0; i < xr21v141x->rx_buflimit; i++)
559 usb_kill_urb(xr21v141x->read_urbs[i]);
560 xr21v141x->control->needs_remote_wakeup = 0;
561 usb_autopm_put_interface(xr21v141x->control);
563 mutex_unlock(&xr21v141x->mutex);
566 static void xr21v141x_tty_cleanup(struct tty_struct *tty)
568 struct xr21v141x *xr21v141x = tty->driver_data;
569 dev_dbg(&xr21v141x->control->dev, "%s\n", __func__);
570 tty_port_put(&xr21v141x->port);
573 static void xr21v141x_tty_hangup(struct tty_struct *tty)
575 struct xr21v141x *xr21v141x = tty->driver_data;
576 dev_dbg(&xr21v141x->control->dev, "%s\n", __func__);
577 tty_port_hangup(&xr21v141x->port);
580 static void xr21v141x_tty_close(struct tty_struct *tty, struct file *filp)
582 struct xr21v141x *xr21v141x = tty->driver_data;
583 dev_dbg(&xr21v141x->control->dev, "%s\n", __func__);
584 tty_port_close(&xr21v141x->port, tty, filp);
587 static int xr21v141x_tty_write(struct tty_struct *tty,
588 const unsigned char *buf, int count)
590 struct xr21v141x *xr21v141x = tty->driver_data;
594 struct xr21v141x_wb *wb;
599 dev_vdbg(&xr21v141x->data->dev, "%s - count %d\n", __func__, count);
601 spin_lock_irqsave(&xr21v141x->write_lock, flags);
602 wbn = xr21v141x_wb_alloc(xr21v141x);
604 spin_unlock_irqrestore(&xr21v141x->write_lock, flags);
607 wb = &xr21v141x->wb[wbn];
609 if (!xr21v141x->dev) {
611 spin_unlock_irqrestore(&xr21v141x->write_lock, flags);
615 count = (count > xr21v141x->writesize) ? xr21v141x->writesize : count;
616 dev_vdbg(&xr21v141x->data->dev, "%s - write %d\n", __func__, count);
617 memcpy(wb->buf, buf, count);
620 usb_autopm_get_interface_async(xr21v141x->control);
621 if (xr21v141x->susp_count) {
622 if (!xr21v141x->delayed_wb)
623 xr21v141x->delayed_wb = wb;
625 usb_autopm_put_interface_async(xr21v141x->control);
626 spin_unlock_irqrestore(&xr21v141x->write_lock, flags);
627 return count; /* A white lie */
629 usb_mark_last_busy(xr21v141x->dev);
631 stat = xr21v141x_start_wb(xr21v141x, wb);
632 spin_unlock_irqrestore(&xr21v141x->write_lock, flags);
639 static int xr21v141x_tty_write_room(struct tty_struct *tty)
641 struct xr21v141x *xr21v141x = tty->driver_data;
643 return xr21v141x_wb_is_avail(xr21v141x) ? xr21v141x->writesize : 0;
646 static int xr21v141x_tty_chars_in_buffer(struct tty_struct *tty)
648 struct xr21v141x *xr21v141x = tty->driver_data;
650 * if the device was unplugged then any remaining characters fell out
651 * of the connector ;)
653 if (xr21v141x->disconnected)
656 return (ACM_NW - xr21v141x_wb_is_avail(xr21v141x)) * xr21v141x->writesize;
659 static void xr21v141x_tty_throttle(struct tty_struct *tty)
661 struct xr21v141x *xr21v141x = tty->driver_data;
663 spin_lock_irq(&xr21v141x->read_lock);
664 xr21v141x->throttle_req = 1;
665 spin_unlock_irq(&xr21v141x->read_lock);
668 static void xr21v141x_tty_unthrottle(struct tty_struct *tty)
670 struct xr21v141x *xr21v141x = tty->driver_data;
671 unsigned int was_throttled;
673 spin_lock_irq(&xr21v141x->read_lock);
674 was_throttled = xr21v141x->throttled;
675 xr21v141x->throttled = 0;
676 xr21v141x->throttle_req = 0;
677 spin_unlock_irq(&xr21v141x->read_lock);
680 xr21v141x_submit_read_urbs(xr21v141x, GFP_KERNEL);
683 static int xr21v141x_tty_break_ctl(struct tty_struct *tty, int state)
685 struct xr21v141x *xr21v141x = tty->driver_data;
688 retval = xr21v141x_send_break(xr21v141x, state ? 0xffff : 0);
690 dev_dbg(&xr21v141x->control->dev, "%s - send break failed\n",
695 static int xr21v141x_tty_tiocmget(struct tty_struct *tty)
697 struct xr21v141x *xr21v141x = tty->driver_data;
699 return (xr21v141x->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) |
700 (xr21v141x->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) |
701 (xr21v141x->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) |
702 (xr21v141x->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) |
703 (xr21v141x->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) |
707 static int xr21v141x_tty_tiocmset(struct tty_struct *tty,
708 unsigned int set, unsigned int clear)
710 struct xr21v141x *xr21v141x = tty->driver_data;
711 unsigned int newctrl;
713 newctrl = xr21v141x->ctrlout;
714 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
715 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0);
716 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
717 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0);
719 newctrl = (newctrl & ~clear) | set;
721 if (xr21v141x->ctrlout == newctrl)
723 return xr21v141x_set_control(xr21v141x, xr21v141x->ctrlout = newctrl);
726 static int get_serial_info(struct xr21v141x *xr21v141x, struct serial_struct __user *info)
728 struct serial_struct tmp;
733 memset(&tmp, 0, sizeof(tmp));
734 tmp.flags = ASYNC_LOW_LATENCY;
735 tmp.xmit_fifo_size = xr21v141x->writesize;
736 tmp.baud_base = le32_to_cpu(xr21v141x->line.dwDTERate);
737 tmp.close_delay = xr21v141x->port.close_delay / 10;
738 tmp.closing_wait = xr21v141x->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
739 ASYNC_CLOSING_WAIT_NONE :
740 xr21v141x->port.closing_wait / 10;
742 if (copy_to_user(info, &tmp, sizeof(tmp)))
748 static int set_serial_info(struct xr21v141x *xr21v141x,
749 struct serial_struct __user *newinfo)
751 struct serial_struct new_serial;
752 unsigned int closing_wait, close_delay;
755 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
758 close_delay = new_serial.close_delay * 10;
759 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
760 ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10;
762 mutex_lock(&xr21v141x->port.mutex);
764 if (!capable(CAP_SYS_ADMIN)) {
765 if ((close_delay != xr21v141x->port.close_delay) ||
766 (closing_wait != xr21v141x->port.closing_wait))
769 retval = -EOPNOTSUPP;
771 xr21v141x->port.close_delay = close_delay;
772 xr21v141x->port.closing_wait = closing_wait;
775 mutex_unlock(&xr21v141x->port.mutex);
781 static int vizzini_set_reg(struct xr21v141x *xr21v141x,
782 int block, int regnum, int value)
786 dev_dbg(&xr21v141x->control->dev, "%s 0x%02x:0x%02x = 0x%02x\n", __func__, block, regnum, value);
788 result = usb_control_msg(xr21v141x->dev, /* usb device */
789 usb_sndctrlpipe(xr21v141x->dev, 0), /* endpoint pipe */
790 XR_SET_REG, /* request */
791 USB_DIR_OUT | USB_TYPE_VENDOR, /* request_type */
792 value, /* request value */
793 regnum | (block << 8), /* index */
801 static int vizzini_get_reg(struct xr21v141x *xr21v141x,
802 int block, int reg, char *value)
806 result = usb_control_msg(xr21v141x->dev, /* usb device */
807 usb_rcvctrlpipe(xr21v141x->dev, 0), /* endpoint pipe */
808 XR_GETN_REG, /* request */
809 USB_DIR_IN | USB_TYPE_VENDOR, /* request_type */
810 0, /* request value */
811 reg | (block << 8), /* index */
820 static void vizzini_disable(struct xr21v141x *xr21v141x)
822 int block = xr21v141x->block;
824 vizzini_set_reg(xr21v141x, block, UART_ENABLE, 0);
825 vizzini_set_reg(xr21v141x, URM_REG_BLOCK, URM_ENABLE_BASE + block, 0);
829 static void vizzini_enable(struct xr21v141x *xr21v141x)
831 int block = xr21v141x->block;
833 vizzini_set_reg(xr21v141x, URM_REG_BLOCK, URM_ENABLE_BASE + block, URM_ENABLE_0_TX);
834 vizzini_set_reg(xr21v141x, block, UART_ENABLE, UART_ENABLE_TX | UART_ENABLE_RX);
835 vizzini_set_reg(xr21v141x, URM_REG_BLOCK, URM_ENABLE_BASE + block, URM_ENABLE_0_TX | URM_ENABLE_0_RX);
839 static void vizzini_loopback(struct xr21v141x *xr21v141x, int from)
841 int block = xr21v141x->block;
846 case 0: lb = UART_LOOPBACK_CTL_RX_UART0; break;
847 case 1: lb = UART_LOOPBACK_CTL_RX_UART1; break;
848 case 2: lb = UART_LOOPBACK_CTL_RX_UART2; break;
849 case 3: lb = UART_LOOPBACK_CTL_RX_UART3; break;
853 dev_info(&xr21v141x->control->dev, "Internal loopback from %d\n", from);
855 vizzini_disable(xr21v141x);
856 vizzini_set_reg(xr21v141x, block, UART_LOOPBACK_CTL, UART_LOOPBACK_CTL_ENABLE | lb);
857 vizzini_enable(xr21v141x);
860 static int vizzini_test_mode(struct xr21v141x *xr21v141x,
863 int retval = usb_control_msg(xr21v141x->dev, usb_sndctrlpipe(xr21v141x->dev, 0),
865 USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_DEVICE,
866 USB_DEVICE_TEST_MODE,
869 dev_dbg(&xr21v141x->control->dev, "vz_test_mode: selector=0x%02x\n", selector);
870 return retval < 0 ? retval : 0;
873 static int xr21v141x_tty_ioctl(struct tty_struct *tty,
874 unsigned int cmd, unsigned long arg)
876 struct xr21v141x *xr21v141x = tty->driver_data;
877 int rv = -ENOIOCTLCMD;
879 unsigned int block, reg, val, match, preciseflags, unicast, broadcast, flow, selector;
883 case TIOCGSERIAL: /* gets serial port data */
884 rv = get_serial_info(xr21v141x, (struct serial_struct __user *) arg);
887 rv = set_serial_info(xr21v141x, (struct serial_struct __user *) arg);
891 if (get_user(block, (int __user *)arg))
893 if (get_user(reg, (int __user *)(arg + sizeof(int))))
896 data = kmalloc(1, GFP_KERNEL);
898 dev_err(&xr21v141x->control->dev, "%s - Cannot allocate USB buffer.\n", __func__);
903 block = xr21v141x->block;
905 rv = vizzini_get_reg(xr21v141x, block, reg, data);
907 dev_err(&xr21v141x->control->dev, "Cannot get register (%d)\n", rv);
912 if (put_user(data[0], (int __user *)(arg + 2 * sizeof(int)))) {
913 dev_err(&xr21v141x->control->dev, "Cannot put user result\n");
922 if (get_user(block, (int __user *)arg))
924 if (get_user(reg, (int __user *)(arg + sizeof(int))))
926 if (get_user(val, (int __user *)(arg + 2 * sizeof(int))))
930 block = xr21v141x->block;
932 rv = vizzini_set_reg(xr21v141x, block, reg, val);
937 case VZIOC_SET_ADDRESS_MATCH:
940 dev_dbg(&xr21v141x->control->dev, "%s VIOC_SET_ADDRESS_MATCH %d\n", __func__, match);
942 vizzini_disable(xr21v141x);
944 if (match & VZ_ADDRESS_MATCH_DISABLE) {
945 flow = UART_FLOW_MODE_NONE;
947 flow = UART_FLOW_MODE_ADDR_MATCH_TX;
948 unicast = (match >> VZ_ADDRESS_UNICAST_S) & 0xff;
949 broadcast = (match >> VZ_ADDRESS_BROADCAST_S) & 0xff;
952 dev_dbg(&xr21v141x->control->dev, "address match: flow=%d ucast=%d bcast=%u\n",
953 flow, unicast, broadcast);
954 vizzini_set_reg(xr21v141x, xr21v141x->block, UART_FLOW, flow);
955 vizzini_set_reg(xr21v141x, xr21v141x->block, UART_XON_CHAR, unicast);
956 vizzini_set_reg(xr21v141x, xr21v141x->block, UART_XOFF_CHAR, broadcast);
958 vizzini_enable(xr21v141x);
961 case VZIOC_SET_PRECISE_FLAGS:
964 dev_dbg(&xr21v141x->control->dev, "%s VIOC_SET_PRECISE_FLAGS %d\n", __func__, preciseflags);
966 vizzini_disable(xr21v141x);
969 xr21v141x->preciseflags = 1;
971 xr21v141x->preciseflags = 0;
974 vizzini_set_reg(xr21v141x, EPLOCALS_REG_BLOCK,
975 (xr21v141x->block * MEM_EP_LOCALS_SIZE) + EP_WIDE_MODE,
976 xr21v141x->preciseflags);
978 vizzini_enable(xr21v141x);
982 case VZIOC_TEST_MODE:
984 dev_dbg(&xr21v141x->control->dev, "%s VIOC_TEST_MODE 0x%02x\n", __func__, selector);
985 vizzini_test_mode(xr21v141x, selector);
991 dev_dbg(&xr21v141x->control->dev, "VIOC_LOOPBACK 0x%02x\n", selector);
992 vizzini_loopback(xr21v141x, selector);
1000 struct vizzini_baud_rate
1007 static struct vizzini_baud_rate vizzini_baud_rates[] = {
1008 { 0x000, 0x000, 0x000 },
1009 { 0x000, 0x000, 0x000 },
1010 { 0x100, 0x000, 0x100 },
1011 { 0x020, 0x400, 0x020 },
1012 { 0x010, 0x100, 0x010 },
1013 { 0x208, 0x040, 0x208 },
1014 { 0x104, 0x820, 0x108 },
1015 { 0x844, 0x210, 0x884 },
1016 { 0x444, 0x110, 0x444 },
1017 { 0x122, 0x888, 0x224 },
1018 { 0x912, 0x448, 0x924 },
1019 { 0x492, 0x248, 0x492 },
1020 { 0x252, 0x928, 0x292 },
1021 { 0X94A, 0X4A4, 0XA52 },
1022 { 0X52A, 0XAA4, 0X54A },
1023 { 0XAAA, 0x954, 0X4AA },
1024 { 0XAAA, 0x554, 0XAAA },
1025 { 0x555, 0XAD4, 0X5AA },
1026 { 0XB55, 0XAB4, 0X55A },
1027 { 0X6B5, 0X5AC, 0XB56 },
1028 { 0X5B5, 0XD6C, 0X6D6 },
1029 { 0XB6D, 0XB6A, 0XDB6 },
1030 { 0X76D, 0X6DA, 0XBB6 },
1031 { 0XEDD, 0XDDA, 0X76E },
1032 { 0XDDD, 0XBBA, 0XEEE },
1033 { 0X7BB, 0XF7A, 0XDDE },
1034 { 0XF7B, 0XEF6, 0X7DE },
1035 { 0XDF7, 0XBF6, 0XF7E },
1036 { 0X7F7, 0XFEE, 0XEFE },
1037 { 0XFDF, 0XFBE, 0X7FE },
1038 { 0XF7F, 0XEFE, 0XFFE },
1039 { 0XFFF, 0XFFE, 0XFFD },
1042 static int vizzini_set_baud_rate(struct xr21v141x *xr21v141x, unsigned int rate)
1044 int block = xr21v141x->block;
1045 unsigned int divisor = 48000000 / rate;
1046 unsigned int i = ((32 * 48000000) / rate) & 0x1f;
1047 unsigned int tx_mask = vizzini_baud_rates[i].tx;
1048 unsigned int rx_mask = (divisor & 1) ? vizzini_baud_rates[i].rx1 : vizzini_baud_rates[i].rx0;
1050 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);
1052 vizzini_set_reg(xr21v141x, block, UART_CLOCK_DIVISOR_0, (divisor >> 0) & 0xff);
1053 vizzini_set_reg(xr21v141x, block, UART_CLOCK_DIVISOR_1, (divisor >> 8) & 0xff);
1054 vizzini_set_reg(xr21v141x, block, UART_CLOCK_DIVISOR_2, (divisor >> 16) & 0xff);
1055 vizzini_set_reg(xr21v141x, block, UART_TX_CLOCK_MASK_0, (tx_mask >> 0) & 0xff);
1056 vizzini_set_reg(xr21v141x, block, UART_TX_CLOCK_MASK_1, (tx_mask >> 8) & 0xff);
1057 vizzini_set_reg(xr21v141x, block, UART_RX_CLOCK_MASK_0, (rx_mask >> 0) & 0xff);
1058 vizzini_set_reg(xr21v141x, block, UART_RX_CLOCK_MASK_1, (rx_mask >> 8) & 0xff);
1064 static void xr21v141x_tty_set_termios(struct tty_struct *tty,
1065 struct ktermios *termios_old)
1067 struct xr21v141x *xr21v141x = tty->driver_data;
1068 unsigned int cflag, block;
1070 unsigned int format_size, format_parity, format_stop, flow, gpio_mode;
1072 cflag = tty->termios.c_cflag;
1074 xr21v141x->clocal = ((cflag & CLOCAL) != 0);
1076 block = xr21v141x->block;
1078 vizzini_disable(xr21v141x);
1080 if ((cflag & CSIZE) == CS7) {
1081 format_size = UART_FORMAT_SIZE_7;
1082 } else if ((cflag & CSIZE) == CS5) {
1083 /* Enabling 5-bit mode is really 9-bit mode! */
1084 format_size = UART_FORMAT_SIZE_9;
1086 format_size = UART_FORMAT_SIZE_8;
1088 xr21v141x->trans9 = (format_size == UART_FORMAT_SIZE_9);
1090 if (cflag & PARENB) {
1091 if (cflag & PARODD) {
1092 if (cflag & CMSPAR) {
1093 format_parity = UART_FORMAT_PARITY_1;
1095 format_parity = UART_FORMAT_PARITY_ODD;
1098 if (cflag & CMSPAR) {
1099 format_parity = UART_FORMAT_PARITY_0;
1101 format_parity = UART_FORMAT_PARITY_EVEN;
1105 format_parity = UART_FORMAT_PARITY_NONE;
1108 if (cflag & CSTOPB) {
1109 format_stop = UART_FORMAT_STOP_2;
1111 format_stop = UART_FORMAT_STOP_1;
1115 if (format_size == UART_FORMAT_SIZE_8) {
1116 xr21v141x->iwa = format_parity;
1117 if (portdata->iwa != UART_FORMAT_PARITY_NONE) {
1118 format_size = UART_FORMAT_SIZE_9;
1119 format_parity = UART_FORMAT_PARITY_NONE;
1122 xr21v141x->iwa = UART_FORMAT_PARITY_NONE;
1125 vizzini_set_reg(xr21v141x, block, UART_FORMAT, format_size | format_parity | format_stop);
1127 if (cflag & CRTSCTS) {
1128 flow = UART_FLOW_MODE_HW;
1129 gpio_mode = UART_GPIO_MODE_SEL_RTS_CTS;
1130 } else if (I_IXOFF(tty) || I_IXON(tty)) {
1131 unsigned char start_char = START_CHAR(tty);
1132 unsigned char stop_char = STOP_CHAR(tty);
1134 flow = UART_FLOW_MODE_SW;
1135 gpio_mode = UART_GPIO_MODE_SEL_GPIO;
1137 vizzini_set_reg(xr21v141x, block, UART_XON_CHAR, start_char);
1138 vizzini_set_reg(xr21v141x, block, UART_XOFF_CHAR, stop_char);
1140 flow = UART_FLOW_MODE_NONE;
1141 gpio_mode = UART_GPIO_MODE_SEL_GPIO;
1144 vizzini_set_reg(xr21v141x, block, UART_FLOW, flow);
1145 vizzini_set_reg(xr21v141x, block, UART_GPIO_MODE, gpio_mode);
1147 if (xr21v141x->trans9) {
1148 /* Turn on wide mode if we're 9-bit transparent. */
1149 vizzini_set_reg(xr21v141x, EPLOCALS_REG_BLOCK, (block * MEM_EP_LOCALS_SIZE) + EP_WIDE_MODE, 1);
1151 } else if (xr21v141x->iwa != UART_FORMAT_PARITY_NONE) {
1152 vizzini_set_reg(xr21v141x, EPLOCALS_REG_BLOCK, (block * MEM_EP_LOCALS_SIZE) + EP_WIDE_MODE, 1);
1154 } else if (!xr21v141x->preciseflags) {
1155 /* Turn off wide mode unless we have precise flags. */
1156 vizzini_set_reg(xr21v141x, EPLOCALS_REG_BLOCK, (block * MEM_EP_LOCALS_SIZE) + EP_WIDE_MODE, 0);
1159 rate = cpu_to_le32(tty_get_baud_rate(tty));
1161 vizzini_set_baud_rate(xr21v141x, rate);
1163 xr21v141x->line.dwDTERate = rate;
1164 xr21v141x->line.bCharFormat = format_stop;
1165 xr21v141x->line.bParityType = format_parity;
1166 xr21v141x->line.bDataBits = format_size;
1168 vizzini_enable(xr21v141x);
1171 static const struct tty_port_operations xr21v141x_port_ops = {
1172 .shutdown = xr21v141x_port_shutdown,
1173 .activate = xr21v141x_port_activate,
1174 .destruct = xr21v141x_port_destruct,
1178 * USB probe and disconnect routines.
1181 /* Little helpers: write/read buffers free */
1182 static void xr21v141x_write_buffers_free(struct xr21v141x *xr21v141x)
1185 struct xr21v141x_wb *wb;
1186 struct usb_device *usb_dev = interface_to_usbdev(xr21v141x->control);
1188 for (wb = &xr21v141x->wb[0], i = 0; i < ACM_NW; i++, wb++)
1189 usb_free_coherent(usb_dev, xr21v141x->writesize, wb->buf, wb->dmah);
1192 static void xr21v141x_read_buffers_free(struct xr21v141x *xr21v141x)
1194 struct usb_device *usb_dev = interface_to_usbdev(xr21v141x->control);
1197 for (i = 0; i < xr21v141x->rx_buflimit; i++)
1198 usb_free_coherent(usb_dev, xr21v141x->readsize,
1199 xr21v141x->read_buffers[i].base, xr21v141x->read_buffers[i].dma);
1202 /* Little helper: write buffers allocate */
1203 static int xr21v141x_write_buffers_alloc(struct xr21v141x *xr21v141x)
1206 struct xr21v141x_wb *wb;
1208 for (wb = &xr21v141x->wb[0], i = 0; i < ACM_NW; i++, wb++) {
1209 wb->buf = usb_alloc_coherent(xr21v141x->dev, xr21v141x->writesize, GFP_KERNEL,
1215 usb_free_coherent(xr21v141x->dev, xr21v141x->writesize,
1224 static int xr21v141x_probe(struct usb_interface *intf,
1225 const struct usb_device_id *id)
1227 struct usb_cdc_union_desc *union_header = NULL;
1228 struct usb_cdc_country_functional_desc *cfd = NULL;
1229 unsigned char *buffer = intf->altsetting->extra;
1230 int buflen = intf->altsetting->extralen;
1231 struct usb_interface *control_interface;
1232 struct usb_interface *data_interface;
1233 struct usb_endpoint_descriptor *epctrl = NULL;
1234 struct usb_endpoint_descriptor *epread = NULL;
1235 struct usb_endpoint_descriptor *epwrite = NULL;
1236 struct usb_device *usb_dev = interface_to_usbdev(intf);
1237 struct xr21v141x *xr21v141x;
1239 int ctrlsize, readsize;
1241 u8 ac_management_function = 0;
1242 u8 call_management_function = 0;
1243 int call_interface_num = -1;
1244 int data_interface_num = -1;
1245 unsigned long quirks;
1248 int combined_interfaces = 0;
1249 struct device *tty_dev;
1253 quirks = (unsigned long)id->driver_info;
1254 num_rx_buf = ACM_NR;
1258 dev_err(&intf->dev, "Weird descriptor references\n");
1263 if (intf->cur_altsetting->endpoint &&
1264 intf->cur_altsetting->endpoint->extralen &&
1265 intf->cur_altsetting->endpoint->extra) {
1267 "Seeking extra descriptors on endpoint\n");
1268 buflen = intf->cur_altsetting->endpoint->extralen;
1269 buffer = intf->cur_altsetting->endpoint->extra;
1272 "Zero length descriptor references\n");
1277 while (buflen > 0) {
1278 if (buffer[1] != USB_DT_CS_INTERFACE) {
1279 dev_err(&intf->dev, "skipping garbage\n");
1283 switch (buffer[2]) {
1284 case USB_CDC_UNION_TYPE: /* we've found it */
1286 dev_err(&intf->dev, "More than one "
1287 "union descriptor, skipping ...\n");
1290 union_header = (struct usb_cdc_union_desc *)buffer;
1292 case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/
1293 cfd = (struct usb_cdc_country_functional_desc *)buffer;
1295 case USB_CDC_HEADER_TYPE: /* maybe check version */
1296 break; /* for now we ignore it */
1297 case USB_CDC_ACM_TYPE:
1298 ac_management_function = buffer[3];
1300 case USB_CDC_CALL_MANAGEMENT_TYPE:
1301 call_management_function = buffer[3];
1302 call_interface_num = buffer[4];
1303 if ((quirks & NOT_A_MODEM) == 0 && (call_management_function & 3) != 3)
1304 dev_err(&intf->dev, "This device cannot do calls on its own. It is not a modem.\n");
1307 /* there are LOTS more CDC descriptors that
1308 * could legitimately be found here.
1310 dev_dbg(&intf->dev, "Ignoring descriptor: "
1311 "type %02x, length %d\n",
1312 buffer[2], buffer[0]);
1316 buflen -= buffer[0];
1317 buffer += buffer[0];
1320 if (!union_header) {
1321 if (call_interface_num > 0) {
1322 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");
1323 /* quirks for Droids MuIn LCD */
1324 if (quirks & NO_DATA_INTERFACE)
1325 data_interface = usb_ifnum_to_if(usb_dev, 0);
1327 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num));
1328 control_interface = intf;
1330 if (intf->cur_altsetting->desc.bNumEndpoints != 3) {
1331 dev_dbg(&intf->dev,"No union descriptor, giving up\n");
1334 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n");
1335 combined_interfaces = 1;
1336 control_interface = data_interface = intf;
1337 goto look_for_collapsed_interface;
1341 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
1342 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0));
1343 if (!control_interface || !data_interface) {
1344 dev_dbg(&intf->dev, "no interfaces\n");
1349 if (data_interface_num != call_interface_num)
1350 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n");
1352 if (control_interface == data_interface) {
1353 /* some broken devices designed for windows work this way */
1354 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n");
1355 combined_interfaces = 1;
1356 /* a popular other OS doesn't use it */
1357 quirks |= NO_CAP_LINE;
1358 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) {
1359 dev_err(&intf->dev, "This needs exactly 3 endpoints\n");
1362 look_for_collapsed_interface:
1363 for (i = 0; i < 3; i++) {
1364 struct usb_endpoint_descriptor *ep;
1365 ep = &data_interface->cur_altsetting->endpoint[i].desc;
1367 if (usb_endpoint_is_int_in(ep))
1369 else if (usb_endpoint_is_bulk_out(ep))
1371 else if (usb_endpoint_is_bulk_in(ep))
1376 if (!epctrl || !epread || !epwrite)
1379 goto made_compressed_probe;
1382 /*workaround for switched interfaces */
1383 if (data_interface->cur_altsetting->desc.bInterfaceClass
1384 != CDC_DATA_INTERFACE_TYPE) {
1385 if (control_interface->cur_altsetting->desc.bInterfaceClass
1386 == CDC_DATA_INTERFACE_TYPE) {
1387 struct usb_interface *t;
1389 "Your device has switched interfaces.\n");
1390 t = control_interface;
1391 control_interface = data_interface;
1398 /* Accept probe requests only for the control interface */
1399 if (!combined_interfaces && intf != control_interface)
1402 if (!combined_interfaces && usb_interface_claimed(data_interface)) {
1403 /* valid in this context */
1404 dev_dbg(&intf->dev, "The data interface isn't available\n");
1409 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 ||
1410 control_interface->cur_altsetting->desc.bNumEndpoints == 0)
1413 epctrl = &control_interface->cur_altsetting->endpoint[0].desc;
1414 epread = &data_interface->cur_altsetting->endpoint[0].desc;
1415 epwrite = &data_interface->cur_altsetting->endpoint[1].desc;
1418 /* workaround for switched endpoints */
1419 if (!usb_endpoint_dir_in(epread)) {
1420 /* descriptors are swapped */
1421 struct usb_endpoint_descriptor *t;
1422 //dev_dbg(&intf->dev,
1423 // "The data interface has switched endpoints\n");
1428 made_compressed_probe:
1429 dev_dbg(&intf->dev, "interfaces are valid\n");
1431 xr21v141x = kzalloc(sizeof(struct xr21v141x), GFP_KERNEL);
1432 if (xr21v141x == NULL) {
1433 dev_err(&intf->dev, "out of memory (xr21v141x kzalloc)\n");
1437 minor = xr21v141x_alloc_minor(xr21v141x);
1438 if (minor == XR21V141X_TTY_MINORS) {
1439 dev_err(&intf->dev, "no more free xr21v141x devices\n");
1444 ctrlsize = usb_endpoint_maxp(epctrl);
1445 readsize = usb_endpoint_maxp(epread) *
1446 (quirks == SINGLE_RX_URB ? 1 : 2);
1447 xr21v141x->combined_interfaces = combined_interfaces;
1448 xr21v141x->writesize = usb_endpoint_maxp(epwrite) * 20;
1449 xr21v141x->control = control_interface;
1450 xr21v141x->data = data_interface;
1451 xr21v141x->minor = minor;
1452 xr21v141x->dev = usb_dev;
1453 xr21v141x->ctrl_caps = ac_management_function;
1454 if (quirks & NO_CAP_LINE)
1455 xr21v141x->ctrl_caps &= ~USB_CDC_CAP_LINE;
1456 xr21v141x->ctrlsize = ctrlsize;
1457 xr21v141x->readsize = readsize;
1458 xr21v141x->rx_buflimit = num_rx_buf;
1459 INIT_WORK(&xr21v141x->work, xr21v141x_softint);
1460 spin_lock_init(&xr21v141x->write_lock);
1461 spin_lock_init(&xr21v141x->read_lock);
1462 mutex_init(&xr21v141x->mutex);
1463 xr21v141x->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress);
1464 xr21v141x->is_int_ep = usb_endpoint_xfer_int(epread);
1465 if (xr21v141x->is_int_ep)
1466 xr21v141x->bInterval = epread->bInterval;
1467 tty_port_init(&xr21v141x->port);
1468 xr21v141x->port.ops = &xr21v141x_port_ops;
1470 xr21v141x->block = epwrite->bEndpointAddress - 1;
1472 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &xr21v141x->ctrl_dma);
1474 dev_err(&intf->dev, "out of memory (ctrl buffer alloc)\n");
1477 xr21v141x->ctrl_buffer = buf;
1479 if (xr21v141x_write_buffers_alloc(xr21v141x) < 0) {
1480 dev_err(&intf->dev, "out of memory (write buffer alloc)\n");
1484 xr21v141x->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);
1485 if (!xr21v141x->ctrlurb) {
1486 dev_err(&intf->dev, "out of memory (ctrlurb kmalloc)\n");
1489 for (i = 0; i < num_rx_buf; i++) {
1490 struct xr21v141x_rb *rb = &(xr21v141x->read_buffers[i]);
1493 rb->base = usb_alloc_coherent(xr21v141x->dev, readsize, GFP_KERNEL,
1496 dev_err(&intf->dev, "out of memory "
1497 "(read bufs usb_alloc_coherent)\n");
1501 rb->instance = xr21v141x;
1503 urb = usb_alloc_urb(0, GFP_KERNEL);
1506 "out of memory (read urbs usb_alloc_urb)\n");
1509 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1510 urb->transfer_dma = rb->dma;
1511 if (xr21v141x->is_int_ep) {
1512 usb_fill_int_urb(urb, xr21v141x->dev,
1513 xr21v141x->rx_endpoint,
1515 xr21v141x->readsize,
1516 xr21v141x_read_bulk_callback, rb,
1517 xr21v141x->bInterval);
1519 usb_fill_bulk_urb(urb, xr21v141x->dev,
1520 xr21v141x->rx_endpoint,
1522 xr21v141x->readsize,
1523 xr21v141x_read_bulk_callback, rb);
1526 xr21v141x->read_urbs[i] = urb;
1527 __set_bit(i, &xr21v141x->read_urbs_free);
1529 for (i = 0; i < ACM_NW; i++) {
1530 struct xr21v141x_wb *snd = &(xr21v141x->wb[i]);
1532 snd->urb = usb_alloc_urb(0, GFP_KERNEL);
1533 if (snd->urb == NULL) {
1535 "out of memory (write urbs usb_alloc_urb)\n");
1539 if (usb_endpoint_xfer_int(epwrite))
1540 usb_fill_int_urb(snd->urb, usb_dev,
1541 usb_sndintpipe(usb_dev, epwrite->bEndpointAddress),
1542 NULL, xr21v141x->writesize, xr21v141x_write_bulk, snd, epwrite->bInterval);
1544 usb_fill_bulk_urb(snd->urb, usb_dev,
1545 usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress),
1546 NULL, xr21v141x->writesize, xr21v141x_write_bulk, snd);
1547 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1548 snd->instance = xr21v141x;
1551 usb_set_intfdata(intf, xr21v141x);
1553 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities);
1557 if (cfd) { /* export the country data */
1558 xr21v141x->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL);
1559 if (!xr21v141x->country_codes)
1560 goto skip_countries;
1561 xr21v141x->country_code_size = cfd->bLength - 4;
1562 memcpy(xr21v141x->country_codes, (u8 *)&cfd->wCountyCode0,
1564 xr21v141x->country_rel_date = cfd->iCountryCodeRelDate;
1566 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);
1568 kfree(xr21v141x->country_codes);
1569 xr21v141x->country_codes = NULL;
1570 xr21v141x->country_code_size = 0;
1571 goto skip_countries;
1574 i = device_create_file(&intf->dev,
1575 &dev_attr_iCountryCodeRelDate);
1577 device_remove_file(&intf->dev, &dev_attr_wCountryCodes);
1578 kfree(xr21v141x->country_codes);
1579 xr21v141x->country_codes = NULL;
1580 xr21v141x->country_code_size = 0;
1581 goto skip_countries;
1586 usb_fill_int_urb(xr21v141x->ctrlurb, usb_dev,
1587 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress),
1588 xr21v141x->ctrl_buffer, ctrlsize, xr21v141x_ctrl_irq, xr21v141x,
1589 /* works around buggy devices */
1590 epctrl->bInterval ? epctrl->bInterval : 16);
1591 xr21v141x->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1592 xr21v141x->ctrlurb->transfer_dma = xr21v141x->ctrl_dma;
1594 dev_info(&intf->dev, "ttyUSB%d: XR21v14x usb uart device\n", minor);
1596 xr21v141x_set_control(xr21v141x, xr21v141x->ctrlout);
1598 xr21v141x->line.dwDTERate = cpu_to_le32(9600);
1599 xr21v141x->line.bDataBits = 8;
1600 xr21v141x_set_line(xr21v141x, &xr21v141x->line);
1602 usb_driver_claim_interface(&xr21v141x_driver, data_interface, xr21v141x);
1603 usb_set_intfdata(data_interface, xr21v141x);
1605 usb_get_intf(control_interface);
1606 tty_dev = tty_port_register_device(&xr21v141x->port, xr21v141x_tty_driver,
1607 minor, &control_interface->dev);
1608 if (IS_ERR(tty_dev)) {
1609 rv = PTR_ERR(tty_dev);
1615 if (xr21v141x->country_codes) {
1616 device_remove_file(&xr21v141x->control->dev,
1617 &dev_attr_wCountryCodes);
1618 device_remove_file(&xr21v141x->control->dev,
1619 &dev_attr_iCountryCodeRelDate);
1621 device_remove_file(&xr21v141x->control->dev, &dev_attr_bmCapabilities);
1623 usb_set_intfdata(intf, NULL);
1624 for (i = 0; i < ACM_NW; i++)
1625 usb_free_urb(xr21v141x->wb[i].urb);
1627 for (i = 0; i < num_rx_buf; i++)
1628 usb_free_urb(xr21v141x->read_urbs[i]);
1629 xr21v141x_read_buffers_free(xr21v141x);
1630 usb_free_urb(xr21v141x->ctrlurb);
1632 xr21v141x_write_buffers_free(xr21v141x);
1634 usb_free_coherent(usb_dev, ctrlsize, xr21v141x->ctrl_buffer, xr21v141x->ctrl_dma);
1636 xr21v141x_release_minor(xr21v141x);
1642 static void stop_data_traffic(struct xr21v141x *xr21v141x)
1646 dev_dbg(&xr21v141x->control->dev, "%s\n", __func__);
1648 usb_kill_urb(xr21v141x->ctrlurb);
1649 for (i = 0; i < ACM_NW; i++)
1650 usb_kill_urb(xr21v141x->wb[i].urb);
1651 for (i = 0; i < xr21v141x->rx_buflimit; i++)
1652 usb_kill_urb(xr21v141x->read_urbs[i]);
1654 cancel_work_sync(&xr21v141x->work);
1657 static void xr21v141x_disconnect(struct usb_interface *intf)
1659 struct xr21v141x *xr21v141x = usb_get_intfdata(intf);
1660 struct usb_device *usb_dev = interface_to_usbdev(intf);
1661 struct tty_struct *tty;
1664 dev_dbg(&intf->dev, "%s\n", __func__);
1666 /* sibling interface is already cleaning up */
1670 mutex_lock(&xr21v141x->mutex);
1671 xr21v141x->disconnected = true;
1672 if (xr21v141x->country_codes) {
1673 device_remove_file(&xr21v141x->control->dev,
1674 &dev_attr_wCountryCodes);
1675 device_remove_file(&xr21v141x->control->dev,
1676 &dev_attr_iCountryCodeRelDate);
1678 device_remove_file(&xr21v141x->control->dev, &dev_attr_bmCapabilities);
1679 usb_set_intfdata(xr21v141x->control, NULL);
1680 usb_set_intfdata(xr21v141x->data, NULL);
1681 mutex_unlock(&xr21v141x->mutex);
1683 tty = tty_port_tty_get(&xr21v141x->port);
1689 stop_data_traffic(xr21v141x);
1691 tty_unregister_device(xr21v141x_tty_driver, xr21v141x->minor);
1693 usb_free_urb(xr21v141x->ctrlurb);
1694 for (i = 0; i < ACM_NW; i++)
1695 usb_free_urb(xr21v141x->wb[i].urb);
1696 for (i = 0; i < xr21v141x->rx_buflimit; i++)
1697 usb_free_urb(xr21v141x->read_urbs[i]);
1698 xr21v141x_write_buffers_free(xr21v141x);
1699 usb_free_coherent(usb_dev, xr21v141x->ctrlsize, xr21v141x->ctrl_buffer, xr21v141x->ctrl_dma);
1700 xr21v141x_read_buffers_free(xr21v141x);
1702 if (!xr21v141x->combined_interfaces)
1703 usb_driver_release_interface(&xr21v141x_driver, intf == xr21v141x->control ?
1704 xr21v141x->data : xr21v141x->control);
1706 tty_port_put(&xr21v141x->port);
1710 static int xr21v141x_suspend(struct usb_interface *intf, pm_message_t message)
1712 struct xr21v141x *xr21v141x = usb_get_intfdata(intf);
1715 if (PMSG_IS_AUTO(message)) {
1718 spin_lock_irq(&xr21v141x->write_lock);
1719 b = xr21v141x->transmitting;
1720 spin_unlock_irq(&xr21v141x->write_lock);
1725 spin_lock_irq(&xr21v141x->read_lock);
1726 spin_lock(&xr21v141x->write_lock);
1727 cnt = xr21v141x->susp_count++;
1728 spin_unlock(&xr21v141x->write_lock);
1729 spin_unlock_irq(&xr21v141x->read_lock);
1734 if (test_bit(ASYNCB_INITIALIZED, &xr21v141x->port.flags))
1735 stop_data_traffic(xr21v141x);
1740 static int xr21v141x_resume(struct usb_interface *intf)
1742 struct xr21v141x *xr21v141x = usb_get_intfdata(intf);
1743 struct xr21v141x_wb *wb;
1747 spin_lock_irq(&xr21v141x->read_lock);
1748 xr21v141x->susp_count -= 1;
1749 cnt = xr21v141x->susp_count;
1750 spin_unlock_irq(&xr21v141x->read_lock);
1755 if (test_bit(ASYNCB_INITIALIZED, &xr21v141x->port.flags)) {
1756 rv = usb_submit_urb(xr21v141x->ctrlurb, GFP_NOIO);
1758 spin_lock_irq(&xr21v141x->write_lock);
1759 if (xr21v141x->delayed_wb) {
1760 wb = xr21v141x->delayed_wb;
1761 xr21v141x->delayed_wb = NULL;
1762 spin_unlock_irq(&xr21v141x->write_lock);
1763 xr21v141x_start_wb(xr21v141x, wb);
1765 spin_unlock_irq(&xr21v141x->write_lock);
1769 * delayed error checking because we must
1770 * do the write path at all cost
1775 rv = xr21v141x_submit_read_urbs(xr21v141x, GFP_NOIO);
1782 static int xr21v141x_reset_resume(struct usb_interface *intf)
1784 struct xr21v141x *xr21v141x = usb_get_intfdata(intf);
1786 if (test_bit(ASYNCB_INITIALIZED, &xr21v141x->port.flags))
1787 tty_port_tty_hangup(&xr21v141x->port, false);
1789 return xr21v141x_resume(intf);
1792 #endif /* CONFIG_PM */
1795 * USB driver structure.
1798 static const struct usb_device_id xrusb_ids[] = {
1799 { USB_DEVICE(0x04e2, 0x1410),
1801 { USB_DEVICE(0x04e2, 0x1412),
1803 { USB_DEVICE(0x04e2, 0x1414),
1808 MODULE_DEVICE_TABLE(usb, xrusb_ids);
1810 static struct usb_driver xr21v141x_driver = {
1812 .probe = xr21v141x_probe,
1813 .disconnect = xr21v141x_disconnect,
1815 .suspend = xr21v141x_suspend,
1816 .resume = xr21v141x_resume,
1817 .reset_resume = xr21v141x_reset_resume,
1819 .id_table = xrusb_ids,
1821 .supports_autosuspend = 1,
1823 .disable_hub_initiated_lpm = 1,
1827 * TTY driver structures.
1830 static const struct tty_operations xr21v141x_ops = {
1831 .install = xr21v141x_tty_install,
1832 .open = xr21v141x_tty_open,
1833 .close = xr21v141x_tty_close,
1834 .cleanup = xr21v141x_tty_cleanup,
1835 .hangup = xr21v141x_tty_hangup,
1836 .write = xr21v141x_tty_write,
1837 .write_room = xr21v141x_tty_write_room,
1838 .ioctl = xr21v141x_tty_ioctl,
1839 .throttle = xr21v141x_tty_throttle,
1840 .unthrottle = xr21v141x_tty_unthrottle,
1841 .chars_in_buffer = xr21v141x_tty_chars_in_buffer,
1842 .break_ctl = xr21v141x_tty_break_ctl,
1843 .set_termios = xr21v141x_tty_set_termios,
1844 .tiocmget = xr21v141x_tty_tiocmget,
1845 .tiocmset = xr21v141x_tty_tiocmset,
1852 static int __init xr21v141x_init(void)
1855 xr21v141x_tty_driver = alloc_tty_driver(XR21V141X_TTY_MINORS);
1856 if (!xr21v141x_tty_driver)
1858 xr21v141x_tty_driver->driver_name = "vizzini",
1859 xr21v141x_tty_driver->name = "ttyUSB",
1860 xr21v141x_tty_driver->major = XR21V141X_TTY_MAJOR,
1861 xr21v141x_tty_driver->minor_start = 0,
1862 xr21v141x_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
1863 xr21v141x_tty_driver->subtype = SERIAL_TYPE_NORMAL,
1864 xr21v141x_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1865 xr21v141x_tty_driver->init_termios = tty_std_termios;
1866 xr21v141x_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
1868 tty_set_operations(xr21v141x_tty_driver, &xr21v141x_ops);
1870 retval = tty_register_driver(xr21v141x_tty_driver);
1872 put_tty_driver(xr21v141x_tty_driver);
1876 retval = usb_register(&xr21v141x_driver);
1878 tty_unregister_driver(xr21v141x_tty_driver);
1879 put_tty_driver(xr21v141x_tty_driver);
1883 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1888 static void __exit xr21v141x_exit(void)
1890 usb_deregister(&xr21v141x_driver);
1891 tty_unregister_driver(xr21v141x_tty_driver);
1892 put_tty_driver(xr21v141x_tty_driver);
1895 module_init(xr21v141x_init);
1896 module_exit(xr21v141x_exit);
1898 MODULE_AUTHOR(DRIVER_AUTHOR);
1899 MODULE_DESCRIPTION(DRIVER_DESC);
1900 MODULE_LICENSE("GPL");
1901 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR);