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);
160 static int xr21v141x_write_start(struct xr21v141x *xr21v141x, int wbn)
163 struct xr21v141x_wb *wb = &xr21v141x->wb[wbn];
166 spin_lock_irqsave(&xr21v141x->write_lock, flags);
167 if (!xr21v141x->dev) {
169 spin_unlock_irqrestore(&xr21v141x->write_lock, flags);
173 dev_vdbg(&xr21v141x->data->dev, "%s - susp_count %d\n", __func__,
174 xr21v141x->susp_count);
175 usb_autopm_get_interface_async(xr21v141x->control);
176 if (xr21v141x->susp_count) {
177 if (!xr21v141x->delayed_wb)
178 xr21v141x->delayed_wb = wb;
180 usb_autopm_put_interface_async(xr21v141x->control);
181 spin_unlock_irqrestore(&xr21v141x->write_lock, flags);
182 return 0; /* A white lie */
184 usb_mark_last_busy(xr21v141x->dev);
186 rc = xr21v141x_start_wb(xr21v141x, wb);
187 spin_unlock_irqrestore(&xr21v141x->write_lock, flags);
193 * attributes exported through sysfs
195 static ssize_t show_caps
196 (struct device *dev, struct device_attribute *attr, char *buf)
198 struct usb_interface *intf = to_usb_interface(dev);
199 struct xr21v141x *xr21v141x = usb_get_intfdata(intf);
201 return sprintf(buf, "%d", xr21v141x->ctrl_caps);
203 static DEVICE_ATTR(bmCapabilities, S_IRUGO, show_caps, NULL);
205 static ssize_t show_country_codes
206 (struct device *dev, struct device_attribute *attr, char *buf)
208 struct usb_interface *intf = to_usb_interface(dev);
209 struct xr21v141x *xr21v141x = usb_get_intfdata(intf);
211 memcpy(buf, xr21v141x->country_codes, xr21v141x->country_code_size);
212 return xr21v141x->country_code_size;
215 static DEVICE_ATTR(wCountryCodes, S_IRUGO, show_country_codes, NULL);
217 static ssize_t show_country_rel_date
218 (struct device *dev, struct device_attribute *attr, char *buf)
220 struct usb_interface *intf = to_usb_interface(dev);
221 struct xr21v141x *xr21v141x = usb_get_intfdata(intf);
223 return sprintf(buf, "%d", xr21v141x->country_rel_date);
226 static DEVICE_ATTR(iCountryCodeRelDate, S_IRUGO, show_country_rel_date, NULL);
228 * Interrupt handlers for various ACM device responses
231 /* control interface reports status changes with "interrupt" transfers */
232 static void xr21v141x_ctrl_irq(struct urb *urb)
234 struct xr21v141x *xr21v141x = urb->context;
235 struct usb_cdc_notification *dr = urb->transfer_buffer;
236 struct tty_struct *tty;
240 int status = urb->status;
249 /* this urb is terminated, clean up */
250 dev_dbg(&xr21v141x->control->dev,
251 "%s - urb shutting down with status: %d\n",
255 dev_dbg(&xr21v141x->control->dev,
256 "%s - nonzero urb status received: %d\n",
261 usb_mark_last_busy(xr21v141x->dev);
263 data = (unsigned char *)(dr + 1);
264 switch (dr->bNotificationType) {
265 case USB_CDC_NOTIFY_NETWORK_CONNECTION:
266 dev_dbg(&xr21v141x->control->dev, "%s - network connection: %d\n",
267 __func__, dr->wValue);
270 case USB_CDC_NOTIFY_SERIAL_STATE:
271 tty = tty_port_tty_get(&xr21v141x->port);
272 newctrl = get_unaligned_le16(data);
275 if (!xr21v141x->clocal &&
276 (xr21v141x->ctrlin & ~newctrl & ACM_CTRL_DCD)) {
277 dev_dbg(&xr21v141x->control->dev,
278 "%s - calling hangup\n", __func__);
284 xr21v141x->ctrlin = newctrl;
286 dev_dbg(&xr21v141x->control->dev,
287 "%s - input control lines: dcd%c dsr%c break%c "
288 "ring%c framing%c parity%c overrun%c\n",
290 xr21v141x->ctrlin & ACM_CTRL_DCD ? '+' : '-',
291 xr21v141x->ctrlin & ACM_CTRL_DSR ? '+' : '-',
292 xr21v141x->ctrlin & ACM_CTRL_BRK ? '+' : '-',
293 xr21v141x->ctrlin & ACM_CTRL_RI ? '+' : '-',
294 xr21v141x->ctrlin & ACM_CTRL_FRAMING ? '+' : '-',
295 xr21v141x->ctrlin & ACM_CTRL_PARITY ? '+' : '-',
296 xr21v141x->ctrlin & ACM_CTRL_OVERRUN ? '+' : '-');
300 dev_dbg(&xr21v141x->control->dev,
301 "%s - unknown notification %d received: index %d "
302 "len %d data0 %d data1 %d\n",
304 dr->bNotificationType, dr->wIndex,
305 dr->wLength, data[0], data[1]);
309 retval = usb_submit_urb(urb, GFP_ATOMIC);
311 dev_err(&xr21v141x->control->dev, "%s - usb_submit_urb failed: %d\n",
315 static int xr21v141x_submit_read_urb(struct xr21v141x *xr21v141x, int index, gfp_t mem_flags)
319 if (!test_and_clear_bit(index, &xr21v141x->read_urbs_free))
322 dev_vdbg(&xr21v141x->data->dev, "%s - urb %d\n", __func__, index);
324 res = usb_submit_urb(xr21v141x->read_urbs[index], mem_flags);
327 dev_err(&xr21v141x->data->dev,
328 "%s - usb_submit_urb failed: %d\n",
331 set_bit(index, &xr21v141x->read_urbs_free);
338 static int xr21v141x_submit_read_urbs(struct xr21v141x *xr21v141x, gfp_t mem_flags)
343 for (i = 0; i < xr21v141x->rx_buflimit; ++i) {
344 res = xr21v141x_submit_read_urb(xr21v141x, i, mem_flags);
352 static void xr21v141x_process_read_urb(struct xr21v141x *xr21v141x, struct urb *urb)
354 struct tty_struct *tty;
356 if (!urb->actual_length)
359 tty = tty_port_tty_get(&xr21v141x->port);
363 tty_insert_flip_string(tty, urb->transfer_buffer, urb->actual_length);
364 tty_flip_buffer_push(tty);
369 static void xr21v141x_read_bulk_callback(struct urb *urb)
371 struct xr21v141x_rb *rb = urb->context;
372 struct xr21v141x *xr21v141x = rb->instance;
375 dev_vdbg(&xr21v141x->data->dev, "%s - urb %d, len %d\n", __func__,
376 rb->index, urb->actual_length);
377 set_bit(rb->index, &xr21v141x->read_urbs_free);
379 if (!xr21v141x->dev) {
380 dev_dbg(&xr21v141x->data->dev, "%s - disconnected\n", __func__);
383 usb_mark_last_busy(xr21v141x->dev);
386 dev_dbg(&xr21v141x->data->dev, "%s - non-zero urb status: %d\n",
387 __func__, urb->status);
390 xr21v141x_process_read_urb(xr21v141x, urb);
392 /* throttle device if requested by tty */
393 spin_lock_irqsave(&xr21v141x->read_lock, flags);
394 xr21v141x->throttled = xr21v141x->throttle_req;
395 if (!xr21v141x->throttled && !xr21v141x->susp_count) {
396 spin_unlock_irqrestore(&xr21v141x->read_lock, flags);
397 xr21v141x_submit_read_urb(xr21v141x, rb->index, GFP_ATOMIC);
399 spin_unlock_irqrestore(&xr21v141x->read_lock, flags);
403 /* data interface wrote those outgoing bytes */
404 static void xr21v141x_write_bulk(struct urb *urb)
406 struct xr21v141x_wb *wb = urb->context;
407 struct xr21v141x *xr21v141x = wb->instance;
410 if (urb->status || (urb->actual_length != urb->transfer_buffer_length))
411 dev_vdbg(&xr21v141x->data->dev, "%s - len %d/%d, status %d\n",
414 urb->transfer_buffer_length,
417 spin_lock_irqsave(&xr21v141x->write_lock, flags);
418 xr21v141x_write_done(xr21v141x, wb);
419 spin_unlock_irqrestore(&xr21v141x->write_lock, flags);
420 schedule_work(&xr21v141x->work);
423 static void xr21v141x_softint(struct work_struct *work)
425 struct xr21v141x *xr21v141x = container_of(work, struct xr21v141x, work);
426 struct tty_struct *tty;
428 dev_vdbg(&xr21v141x->data->dev, "%s\n", __func__);
430 tty = tty_port_tty_get(&xr21v141x->port);
441 static struct xr21v141x *xr21v141x_get_by_index(unsigned index)
443 struct xr21v141x *xr21v141x;
445 mutex_lock(&xr21v141x_table_lock);
446 xr21v141x = xr21v141x_table[index];
448 mutex_lock(&xr21v141x->mutex);
449 if (xr21v141x->disconnected) {
450 mutex_unlock(&xr21v141x->mutex);
453 tty_port_get(&xr21v141x->port);
454 mutex_unlock(&xr21v141x->mutex);
457 mutex_unlock(&xr21v141x_table_lock);
462 * Try to find an available minor number and if found, associate it with 'xr21v141x'.
464 static int xr21v141x_alloc_minor(struct xr21v141x *xr21v141x)
468 mutex_lock(&xr21v141x_table_lock);
469 for (minor = 0; minor < XR21V141X_TTY_MINORS; minor++) {
470 if (!xr21v141x_table[minor]) {
471 xr21v141x_table[minor] = xr21v141x;
475 mutex_unlock(&xr21v141x_table_lock);
480 /* Release the minor number associated with 'xr21v141x'. */
481 static void xr21v141x_release_minor(struct xr21v141x *xr21v141x)
483 mutex_lock(&xr21v141x_table_lock);
484 xr21v141x_table[xr21v141x->minor] = NULL;
485 mutex_unlock(&xr21v141x_table_lock);
488 static int xr21v141x_tty_install(struct tty_driver *driver, struct tty_struct *tty)
490 struct xr21v141x *xr21v141x;
493 dev_dbg(tty->dev, "%s\n", __func__);
495 xr21v141x = xr21v141x_get_by_index(tty->index);
499 retval = tty_standard_install(driver, tty);
501 goto error_init_termios;
503 tty->driver_data = xr21v141x;
508 tty_port_put(&xr21v141x->port);
512 static int xr21v141x_tty_open(struct tty_struct *tty, struct file *filp)
514 struct xr21v141x *xr21v141x = tty->driver_data;
516 dev_dbg(tty->dev, "%s\n", __func__);
518 return tty_port_open(&xr21v141x->port, tty, filp);
521 static int xr21v141x_port_activate(struct tty_port *port, struct tty_struct *tty)
523 struct xr21v141x *xr21v141x = container_of(port, struct xr21v141x, port);
524 int retval = -ENODEV;
526 dev_dbg(&xr21v141x->control->dev, "%s\n", __func__);
528 mutex_lock(&xr21v141x->mutex);
529 if (xr21v141x->disconnected)
532 retval = usb_autopm_get_interface(xr21v141x->control);
534 goto error_get_interface;
536 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
537 xr21v141x->control->needs_remote_wakeup = 1;
539 xr21v141x->ctrlurb->dev = xr21v141x->dev;
540 if (usb_submit_urb(xr21v141x->ctrlurb, GFP_KERNEL)) {
541 dev_err(&xr21v141x->control->dev,
542 "%s - usb_submit_urb(ctrl irq) failed\n", __func__);
543 goto error_submit_urb;
546 xr21v141x->ctrlout = ACM_CTRL_DTR | ACM_CTRL_RTS;
547 if (xr21v141x_set_control(xr21v141x, xr21v141x->ctrlout) < 0 &&
548 (xr21v141x->ctrl_caps & USB_CDC_CAP_LINE))
549 goto error_set_control;
551 usb_autopm_put_interface(xr21v141x->control);
554 * Unthrottle device in case the TTY was closed while throttled.
556 spin_lock_irq(&xr21v141x->read_lock);
557 xr21v141x->throttled = 0;
558 xr21v141x->throttle_req = 0;
559 spin_unlock_irq(&xr21v141x->read_lock);
561 if (xr21v141x_submit_read_urbs(xr21v141x, GFP_KERNEL))
562 goto error_submit_read_urbs;
564 mutex_unlock(&xr21v141x->mutex);
568 error_submit_read_urbs:
569 xr21v141x->ctrlout = 0;
570 xr21v141x_set_control(xr21v141x, xr21v141x->ctrlout);
572 usb_kill_urb(xr21v141x->ctrlurb);
574 usb_autopm_put_interface(xr21v141x->control);
577 mutex_unlock(&xr21v141x->mutex);
581 static void xr21v141x_port_destruct(struct tty_port *port)
583 struct xr21v141x *xr21v141x = container_of(port, struct xr21v141x, port);
585 dev_dbg(&xr21v141x->control->dev, "%s\n", __func__);
587 tty_unregister_device(xr21v141x_tty_driver, xr21v141x->minor);
588 xr21v141x_release_minor(xr21v141x);
589 usb_put_intf(xr21v141x->control);
590 kfree(xr21v141x->country_codes);
594 static void xr21v141x_port_shutdown(struct tty_port *port)
596 struct xr21v141x *xr21v141x = container_of(port, struct xr21v141x, port);
599 dev_dbg(&xr21v141x->control->dev, "%s\n", __func__);
601 mutex_lock(&xr21v141x->mutex);
602 if (!xr21v141x->disconnected) {
603 usb_autopm_get_interface(xr21v141x->control);
604 xr21v141x_set_control(xr21v141x, xr21v141x->ctrlout = 0);
605 usb_kill_urb(xr21v141x->ctrlurb);
606 for (i = 0; i < ACM_NW; i++)
607 usb_kill_urb(xr21v141x->wb[i].urb);
608 for (i = 0; i < xr21v141x->rx_buflimit; i++)
609 usb_kill_urb(xr21v141x->read_urbs[i]);
610 xr21v141x->control->needs_remote_wakeup = 0;
611 usb_autopm_put_interface(xr21v141x->control);
613 mutex_unlock(&xr21v141x->mutex);
616 static void xr21v141x_tty_cleanup(struct tty_struct *tty)
618 struct xr21v141x *xr21v141x = tty->driver_data;
619 dev_dbg(&xr21v141x->control->dev, "%s\n", __func__);
620 tty_port_put(&xr21v141x->port);
623 static void xr21v141x_tty_hangup(struct tty_struct *tty)
625 struct xr21v141x *xr21v141x = tty->driver_data;
626 dev_dbg(&xr21v141x->control->dev, "%s\n", __func__);
627 tty_port_hangup(&xr21v141x->port);
630 static void xr21v141x_tty_close(struct tty_struct *tty, struct file *filp)
632 struct xr21v141x *xr21v141x = tty->driver_data;
633 dev_dbg(&xr21v141x->control->dev, "%s\n", __func__);
634 tty_port_close(&xr21v141x->port, tty, filp);
637 static int xr21v141x_tty_write(struct tty_struct *tty,
638 const unsigned char *buf, int count)
640 struct xr21v141x *xr21v141x = tty->driver_data;
644 struct xr21v141x_wb *wb;
649 dev_vdbg(&xr21v141x->data->dev, "%s - count %d\n", __func__, count);
651 spin_lock_irqsave(&xr21v141x->write_lock, flags);
652 wbn = xr21v141x_wb_alloc(xr21v141x);
654 spin_unlock_irqrestore(&xr21v141x->write_lock, flags);
657 wb = &xr21v141x->wb[wbn];
659 count = (count > xr21v141x->writesize) ? xr21v141x->writesize : count;
660 dev_vdbg(&xr21v141x->data->dev, "%s - write %d\n", __func__, count);
661 memcpy(wb->buf, buf, count);
663 spin_unlock_irqrestore(&xr21v141x->write_lock, flags);
665 stat = xr21v141x_write_start(xr21v141x, wbn);
671 static int xr21v141x_tty_write_room(struct tty_struct *tty)
673 struct xr21v141x *xr21v141x = tty->driver_data;
675 return xr21v141x_wb_is_avail(xr21v141x) ? xr21v141x->writesize : 0;
678 static int xr21v141x_tty_chars_in_buffer(struct tty_struct *tty)
680 struct xr21v141x *xr21v141x = tty->driver_data;
682 * if the device was unplugged then any remaining characters fell out
683 * of the connector ;)
685 if (xr21v141x->disconnected)
688 return (ACM_NW - xr21v141x_wb_is_avail(xr21v141x)) * xr21v141x->writesize;
691 static void xr21v141x_tty_throttle(struct tty_struct *tty)
693 struct xr21v141x *xr21v141x = tty->driver_data;
695 spin_lock_irq(&xr21v141x->read_lock);
696 xr21v141x->throttle_req = 1;
697 spin_unlock_irq(&xr21v141x->read_lock);
700 static void xr21v141x_tty_unthrottle(struct tty_struct *tty)
702 struct xr21v141x *xr21v141x = tty->driver_data;
703 unsigned int was_throttled;
705 spin_lock_irq(&xr21v141x->read_lock);
706 was_throttled = xr21v141x->throttled;
707 xr21v141x->throttled = 0;
708 xr21v141x->throttle_req = 0;
709 spin_unlock_irq(&xr21v141x->read_lock);
712 xr21v141x_submit_read_urbs(xr21v141x, GFP_KERNEL);
715 static int xr21v141x_tty_break_ctl(struct tty_struct *tty, int state)
717 struct xr21v141x *xr21v141x = tty->driver_data;
720 retval = xr21v141x_send_break(xr21v141x, state ? 0xffff : 0);
722 dev_dbg(&xr21v141x->control->dev, "%s - send break failed\n",
727 static int xr21v141x_tty_tiocmget(struct tty_struct *tty)
729 struct xr21v141x *xr21v141x = tty->driver_data;
731 return (xr21v141x->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) |
732 (xr21v141x->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) |
733 (xr21v141x->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) |
734 (xr21v141x->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) |
735 (xr21v141x->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) |
739 static int xr21v141x_tty_tiocmset(struct tty_struct *tty,
740 unsigned int set, unsigned int clear)
742 struct xr21v141x *xr21v141x = tty->driver_data;
743 unsigned int newctrl;
745 newctrl = xr21v141x->ctrlout;
746 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
747 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0);
748 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
749 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0);
751 newctrl = (newctrl & ~clear) | set;
753 if (xr21v141x->ctrlout == newctrl)
755 return xr21v141x_set_control(xr21v141x, xr21v141x->ctrlout = newctrl);
758 static int get_serial_info(struct xr21v141x *xr21v141x, struct serial_struct __user *info)
760 struct serial_struct tmp;
765 memset(&tmp, 0, sizeof(tmp));
766 tmp.flags = ASYNC_LOW_LATENCY;
767 tmp.xmit_fifo_size = xr21v141x->writesize;
768 tmp.baud_base = le32_to_cpu(xr21v141x->line.dwDTERate);
769 tmp.close_delay = xr21v141x->port.close_delay / 10;
770 tmp.closing_wait = xr21v141x->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
771 ASYNC_CLOSING_WAIT_NONE :
772 xr21v141x->port.closing_wait / 10;
774 if (copy_to_user(info, &tmp, sizeof(tmp)))
780 static int set_serial_info(struct xr21v141x *xr21v141x,
781 struct serial_struct __user *newinfo)
783 struct serial_struct new_serial;
784 unsigned int closing_wait, close_delay;
787 if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
790 close_delay = new_serial.close_delay * 10;
791 closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
792 ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10;
794 mutex_lock(&xr21v141x->port.mutex);
796 if (!capable(CAP_SYS_ADMIN)) {
797 if ((close_delay != xr21v141x->port.close_delay) ||
798 (closing_wait != xr21v141x->port.closing_wait))
801 retval = -EOPNOTSUPP;
803 xr21v141x->port.close_delay = close_delay;
804 xr21v141x->port.closing_wait = closing_wait;
807 mutex_unlock(&xr21v141x->port.mutex);
813 static int vizzini_set_reg(struct xr21v141x *xr21v141x,
814 int block, int regnum, int value)
818 dev_dbg(&xr21v141x->control->dev, "%s 0x%02x:0x%02x = 0x%02x\n", __func__, block, regnum, value);
820 result = usb_control_msg(xr21v141x->dev, /* usb device */
821 usb_sndctrlpipe(xr21v141x->dev, 0), /* endpoint pipe */
822 XR_SET_REG, /* request */
823 USB_DIR_OUT | USB_TYPE_VENDOR, /* request_type */
824 value, /* request value */
825 regnum | (block << 8), /* index */
833 static int vizzini_get_reg(struct xr21v141x *xr21v141x,
834 int block, int reg, char *value)
838 result = usb_control_msg(xr21v141x->dev, /* usb device */
839 usb_rcvctrlpipe(xr21v141x->dev, 0), /* endpoint pipe */
840 XR_GETN_REG, /* request */
841 USB_DIR_IN | USB_TYPE_VENDOR, /* request_type */
842 0, /* request value */
843 reg | (block << 8), /* index */
852 static void vizzini_disable(struct xr21v141x *xr21v141x)
854 int block = xr21v141x->block;
856 vizzini_set_reg(xr21v141x, block, UART_ENABLE, 0);
857 vizzini_set_reg(xr21v141x, URM_REG_BLOCK, URM_ENABLE_BASE + block, 0);
861 static void vizzini_enable(struct xr21v141x *xr21v141x)
863 int block = xr21v141x->block;
865 vizzini_set_reg(xr21v141x, URM_REG_BLOCK, URM_ENABLE_BASE + block, URM_ENABLE_0_TX);
866 vizzini_set_reg(xr21v141x, block, UART_ENABLE, UART_ENABLE_TX | UART_ENABLE_RX);
867 vizzini_set_reg(xr21v141x, URM_REG_BLOCK, URM_ENABLE_BASE + block, URM_ENABLE_0_TX | URM_ENABLE_0_RX);
871 static void vizzini_loopback(struct xr21v141x *xr21v141x, int from)
873 int block = xr21v141x->block;
878 case 0: lb = UART_LOOPBACK_CTL_RX_UART0; break;
879 case 1: lb = UART_LOOPBACK_CTL_RX_UART1; break;
880 case 2: lb = UART_LOOPBACK_CTL_RX_UART2; break;
881 case 3: lb = UART_LOOPBACK_CTL_RX_UART3; break;
885 dev_info(&xr21v141x->control->dev, "Internal loopback from %d\n", from);
887 vizzini_disable(xr21v141x);
888 vizzini_set_reg(xr21v141x, block, UART_LOOPBACK_CTL, UART_LOOPBACK_CTL_ENABLE | lb);
889 vizzini_enable(xr21v141x);
892 static int vizzini_test_mode(struct xr21v141x *xr21v141x,
895 int retval = usb_control_msg(xr21v141x->dev, usb_sndctrlpipe(xr21v141x->dev, 0),
897 USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_DEVICE,
898 USB_DEVICE_TEST_MODE,
901 dev_dbg(&xr21v141x->control->dev, "vz_test_mode: selector=0x%02x\n", selector);
902 return retval < 0 ? retval : 0;
905 static int xr21v141x_tty_ioctl(struct tty_struct *tty,
906 unsigned int cmd, unsigned long arg)
908 struct xr21v141x *xr21v141x = tty->driver_data;
909 int rv = -ENOIOCTLCMD;
911 unsigned int block, reg, val, match, preciseflags, unicast, broadcast, flow, selector;
915 case TIOCGSERIAL: /* gets serial port data */
916 rv = get_serial_info(xr21v141x, (struct serial_struct __user *) arg);
919 rv = set_serial_info(xr21v141x, (struct serial_struct __user *) arg);
923 if (get_user(block, (int __user *)arg))
925 if (get_user(reg, (int __user *)(arg + sizeof(int))))
928 data = kmalloc(1, GFP_KERNEL);
930 dev_err(&xr21v141x->control->dev, "%s - Cannot allocate USB buffer.\n", __func__);
935 block = xr21v141x->block;
937 rv = vizzini_get_reg(xr21v141x, block, reg, data);
939 dev_err(&xr21v141x->control->dev, "Cannot get register (%d)\n", rv);
944 if (put_user(data[0], (int __user *)(arg + 2 * sizeof(int)))) {
945 dev_err(&xr21v141x->control->dev, "Cannot put user result\n");
954 if (get_user(block, (int __user *)arg))
956 if (get_user(reg, (int __user *)(arg + sizeof(int))))
958 if (get_user(val, (int __user *)(arg + 2 * sizeof(int))))
962 block = xr21v141x->block;
964 rv = vizzini_set_reg(xr21v141x, block, reg, val);
969 case VZIOC_SET_ADDRESS_MATCH:
972 dev_dbg(&xr21v141x->control->dev, "%s VIOC_SET_ADDRESS_MATCH %d\n", __func__, match);
974 vizzini_disable(xr21v141x);
976 if (match & VZ_ADDRESS_MATCH_DISABLE) {
977 flow = UART_FLOW_MODE_NONE;
979 flow = UART_FLOW_MODE_ADDR_MATCH_TX;
980 unicast = (match >> VZ_ADDRESS_UNICAST_S) & 0xff;
981 broadcast = (match >> VZ_ADDRESS_BROADCAST_S) & 0xff;
984 dev_dbg(&xr21v141x->control->dev, "address match: flow=%d ucast=%d bcast=%u\n",
985 flow, unicast, broadcast);
986 vizzini_set_reg(xr21v141x, xr21v141x->block, UART_FLOW, flow);
987 vizzini_set_reg(xr21v141x, xr21v141x->block, UART_XON_CHAR, unicast);
988 vizzini_set_reg(xr21v141x, xr21v141x->block, UART_XOFF_CHAR, broadcast);
990 vizzini_enable(xr21v141x);
993 case VZIOC_SET_PRECISE_FLAGS:
996 dev_dbg(&xr21v141x->control->dev, "%s VIOC_SET_PRECISE_FLAGS %d\n", __func__, preciseflags);
998 vizzini_disable(xr21v141x);
1001 xr21v141x->preciseflags = 1;
1003 xr21v141x->preciseflags = 0;
1006 vizzini_set_reg(xr21v141x, EPLOCALS_REG_BLOCK,
1007 (xr21v141x->block * MEM_EP_LOCALS_SIZE) + EP_WIDE_MODE,
1008 xr21v141x->preciseflags);
1010 vizzini_enable(xr21v141x);
1014 case VZIOC_TEST_MODE:
1016 dev_dbg(&xr21v141x->control->dev, "%s VIOC_TEST_MODE 0x%02x\n", __func__, selector);
1017 vizzini_test_mode(xr21v141x, selector);
1021 case VZIOC_LOOPBACK:
1023 dev_dbg(&xr21v141x->control->dev, "VIOC_LOOPBACK 0x%02x\n", selector);
1024 vizzini_loopback(xr21v141x, selector);
1032 struct vizzini_baud_rate
1039 static struct vizzini_baud_rate vizzini_baud_rates[] = {
1040 { 0x000, 0x000, 0x000 },
1041 { 0x000, 0x000, 0x000 },
1042 { 0x100, 0x000, 0x100 },
1043 { 0x020, 0x400, 0x020 },
1044 { 0x010, 0x100, 0x010 },
1045 { 0x208, 0x040, 0x208 },
1046 { 0x104, 0x820, 0x108 },
1047 { 0x844, 0x210, 0x884 },
1048 { 0x444, 0x110, 0x444 },
1049 { 0x122, 0x888, 0x224 },
1050 { 0x912, 0x448, 0x924 },
1051 { 0x492, 0x248, 0x492 },
1052 { 0x252, 0x928, 0x292 },
1053 { 0X94A, 0X4A4, 0XA52 },
1054 { 0X52A, 0XAA4, 0X54A },
1055 { 0XAAA, 0x954, 0X4AA },
1056 { 0XAAA, 0x554, 0XAAA },
1057 { 0x555, 0XAD4, 0X5AA },
1058 { 0XB55, 0XAB4, 0X55A },
1059 { 0X6B5, 0X5AC, 0XB56 },
1060 { 0X5B5, 0XD6C, 0X6D6 },
1061 { 0XB6D, 0XB6A, 0XDB6 },
1062 { 0X76D, 0X6DA, 0XBB6 },
1063 { 0XEDD, 0XDDA, 0X76E },
1064 { 0XDDD, 0XBBA, 0XEEE },
1065 { 0X7BB, 0XF7A, 0XDDE },
1066 { 0XF7B, 0XEF6, 0X7DE },
1067 { 0XDF7, 0XBF6, 0XF7E },
1068 { 0X7F7, 0XFEE, 0XEFE },
1069 { 0XFDF, 0XFBE, 0X7FE },
1070 { 0XF7F, 0XEFE, 0XFFE },
1071 { 0XFFF, 0XFFE, 0XFFD },
1074 static int vizzini_set_baud_rate(struct xr21v141x *xr21v141x, unsigned int rate)
1076 int block = xr21v141x->block;
1077 unsigned int divisor = 48000000 / rate;
1078 unsigned int i = ((32 * 48000000) / rate) & 0x1f;
1079 unsigned int tx_mask = vizzini_baud_rates[i].tx;
1080 unsigned int rx_mask = (divisor & 1) ? vizzini_baud_rates[i].rx1 : vizzini_baud_rates[i].rx0;
1082 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);
1084 vizzini_set_reg(xr21v141x, block, UART_CLOCK_DIVISOR_0, (divisor >> 0) & 0xff);
1085 vizzini_set_reg(xr21v141x, block, UART_CLOCK_DIVISOR_1, (divisor >> 8) & 0xff);
1086 vizzini_set_reg(xr21v141x, block, UART_CLOCK_DIVISOR_2, (divisor >> 16) & 0xff);
1087 vizzini_set_reg(xr21v141x, block, UART_TX_CLOCK_MASK_0, (tx_mask >> 0) & 0xff);
1088 vizzini_set_reg(xr21v141x, block, UART_TX_CLOCK_MASK_1, (tx_mask >> 8) & 0xff);
1089 vizzini_set_reg(xr21v141x, block, UART_RX_CLOCK_MASK_0, (rx_mask >> 0) & 0xff);
1090 vizzini_set_reg(xr21v141x, block, UART_RX_CLOCK_MASK_1, (rx_mask >> 8) & 0xff);
1096 static void xr21v141x_tty_set_termios(struct tty_struct *tty,
1097 struct ktermios *termios_old)
1099 struct xr21v141x *xr21v141x = tty->driver_data;
1100 unsigned int cflag, block;
1102 unsigned int format_size, format_parity, format_stop, flow, gpio_mode;
1104 cflag = tty->termios->c_cflag;
1106 xr21v141x->clocal = ((cflag & CLOCAL) != 0);
1108 block = xr21v141x->block;
1110 vizzini_disable(xr21v141x);
1112 if ((cflag & CSIZE) == CS7) {
1113 format_size = UART_FORMAT_SIZE_7;
1114 } else if ((cflag & CSIZE) == CS5) {
1115 /* Enabling 5-bit mode is really 9-bit mode! */
1116 format_size = UART_FORMAT_SIZE_9;
1118 format_size = UART_FORMAT_SIZE_8;
1120 xr21v141x->trans9 = (format_size == UART_FORMAT_SIZE_9);
1122 if (cflag & PARENB) {
1123 if (cflag & PARODD) {
1124 if (cflag & CMSPAR) {
1125 format_parity = UART_FORMAT_PARITY_1;
1127 format_parity = UART_FORMAT_PARITY_ODD;
1130 if (cflag & CMSPAR) {
1131 format_parity = UART_FORMAT_PARITY_0;
1133 format_parity = UART_FORMAT_PARITY_EVEN;
1137 format_parity = UART_FORMAT_PARITY_NONE;
1140 if (cflag & CSTOPB) {
1141 format_stop = UART_FORMAT_STOP_2;
1143 format_stop = UART_FORMAT_STOP_1;
1147 if (format_size == UART_FORMAT_SIZE_8) {
1148 xr21v141x->iwa = format_parity;
1149 if (portdata->iwa != UART_FORMAT_PARITY_NONE) {
1150 format_size = UART_FORMAT_SIZE_9;
1151 format_parity = UART_FORMAT_PARITY_NONE;
1154 xr21v141x->iwa = UART_FORMAT_PARITY_NONE;
1157 vizzini_set_reg(xr21v141x, block, UART_FORMAT, format_size | format_parity | format_stop);
1159 if (cflag & CRTSCTS) {
1160 flow = UART_FLOW_MODE_HW;
1161 gpio_mode = UART_GPIO_MODE_SEL_RTS_CTS;
1162 } else if (I_IXOFF(tty) || I_IXON(tty)) {
1163 unsigned char start_char = START_CHAR(tty);
1164 unsigned char stop_char = STOP_CHAR(tty);
1166 flow = UART_FLOW_MODE_SW;
1167 gpio_mode = UART_GPIO_MODE_SEL_GPIO;
1169 vizzini_set_reg(xr21v141x, block, UART_XON_CHAR, start_char);
1170 vizzini_set_reg(xr21v141x, block, UART_XOFF_CHAR, stop_char);
1172 flow = UART_FLOW_MODE_NONE;
1173 gpio_mode = UART_GPIO_MODE_SEL_GPIO;
1176 vizzini_set_reg(xr21v141x, block, UART_FLOW, flow);
1177 vizzini_set_reg(xr21v141x, block, UART_GPIO_MODE, gpio_mode);
1179 if (xr21v141x->trans9) {
1180 /* Turn on wide mode if we're 9-bit transparent. */
1181 vizzini_set_reg(xr21v141x, EPLOCALS_REG_BLOCK, (block * MEM_EP_LOCALS_SIZE) + EP_WIDE_MODE, 1);
1183 } else if (xr21v141x->iwa != UART_FORMAT_PARITY_NONE) {
1184 vizzini_set_reg(xr21v141x, EPLOCALS_REG_BLOCK, (block * MEM_EP_LOCALS_SIZE) + EP_WIDE_MODE, 1);
1186 } else if (!xr21v141x->preciseflags) {
1187 /* Turn off wide mode unless we have precise flags. */
1188 vizzini_set_reg(xr21v141x, EPLOCALS_REG_BLOCK, (block * MEM_EP_LOCALS_SIZE) + EP_WIDE_MODE, 0);
1191 rate = cpu_to_le32(tty_get_baud_rate(tty));
1193 vizzini_set_baud_rate(xr21v141x, rate);
1195 xr21v141x->line.dwDTERate = rate;
1196 xr21v141x->line.bCharFormat = format_stop;
1197 xr21v141x->line.bParityType = format_parity;
1198 xr21v141x->line.bDataBits = format_size;
1200 vizzini_enable(xr21v141x);
1203 static const struct tty_port_operations xr21v141x_port_ops = {
1204 .shutdown = xr21v141x_port_shutdown,
1205 .activate = xr21v141x_port_activate,
1206 .destruct = xr21v141x_port_destruct,
1210 * USB probe and disconnect routines.
1213 /* Little helpers: write/read buffers free */
1214 static void xr21v141x_write_buffers_free(struct xr21v141x *xr21v141x)
1217 struct xr21v141x_wb *wb;
1218 struct usb_device *usb_dev = interface_to_usbdev(xr21v141x->control);
1220 for (wb = &xr21v141x->wb[0], i = 0; i < ACM_NW; i++, wb++)
1221 usb_free_coherent(usb_dev, xr21v141x->writesize, wb->buf, wb->dmah);
1224 static void xr21v141x_read_buffers_free(struct xr21v141x *xr21v141x)
1226 struct usb_device *usb_dev = interface_to_usbdev(xr21v141x->control);
1229 for (i = 0; i < xr21v141x->rx_buflimit; i++)
1230 usb_free_coherent(usb_dev, xr21v141x->readsize,
1231 xr21v141x->read_buffers[i].base, xr21v141x->read_buffers[i].dma);
1234 /* Little helper: write buffers allocate */
1235 static int xr21v141x_write_buffers_alloc(struct xr21v141x *xr21v141x)
1238 struct xr21v141x_wb *wb;
1240 for (wb = &xr21v141x->wb[0], i = 0; i < ACM_NW; i++, wb++) {
1241 wb->buf = usb_alloc_coherent(xr21v141x->dev, xr21v141x->writesize, GFP_KERNEL,
1247 usb_free_coherent(xr21v141x->dev, xr21v141x->writesize,
1256 static int xr21v141x_probe(struct usb_interface *intf,
1257 const struct usb_device_id *id)
1259 struct usb_cdc_union_desc *union_header = NULL;
1260 struct usb_cdc_country_functional_desc *cfd = NULL;
1261 unsigned char *buffer = intf->altsetting->extra;
1262 int buflen = intf->altsetting->extralen;
1263 struct usb_interface *control_interface;
1264 struct usb_interface *data_interface;
1265 struct usb_endpoint_descriptor *epctrl = NULL;
1266 struct usb_endpoint_descriptor *epread = NULL;
1267 struct usb_endpoint_descriptor *epwrite = NULL;
1268 struct usb_device *usb_dev = interface_to_usbdev(intf);
1269 struct xr21v141x *xr21v141x;
1271 int ctrlsize, readsize;
1273 u8 ac_management_function = 0;
1274 u8 call_management_function = 0;
1275 int call_interface_num = -1;
1276 int data_interface_num = -1;
1277 unsigned long quirks;
1280 int combined_interfaces = 0;
1283 quirks = (unsigned long)id->driver_info;
1284 num_rx_buf = ACM_NR;
1288 dev_err(&intf->dev, "Weird descriptor references\n");
1293 if (intf->cur_altsetting->endpoint &&
1294 intf->cur_altsetting->endpoint->extralen &&
1295 intf->cur_altsetting->endpoint->extra) {
1297 "Seeking extra descriptors on endpoint\n");
1298 buflen = intf->cur_altsetting->endpoint->extralen;
1299 buffer = intf->cur_altsetting->endpoint->extra;
1302 "Zero length descriptor references\n");
1307 while (buflen > 0) {
1308 if (buffer[1] != USB_DT_CS_INTERFACE) {
1309 dev_err(&intf->dev, "skipping garbage\n");
1313 switch (buffer[2]) {
1314 case USB_CDC_UNION_TYPE: /* we've found it */
1316 dev_err(&intf->dev, "More than one "
1317 "union descriptor, skipping ...\n");
1320 union_header = (struct usb_cdc_union_desc *)buffer;
1322 case USB_CDC_COUNTRY_TYPE: /* export through sysfs*/
1323 cfd = (struct usb_cdc_country_functional_desc *)buffer;
1325 case USB_CDC_HEADER_TYPE: /* maybe check version */
1326 break; /* for now we ignore it */
1327 case USB_CDC_ACM_TYPE:
1328 ac_management_function = buffer[3];
1330 case USB_CDC_CALL_MANAGEMENT_TYPE:
1331 call_management_function = buffer[3];
1332 call_interface_num = buffer[4];
1333 if ((quirks & NOT_A_MODEM) == 0 && (call_management_function & 3) != 3)
1334 dev_err(&intf->dev, "This device cannot do calls on its own. It is not a modem.\n");
1337 /* there are LOTS more CDC descriptors that
1338 * could legitimately be found here.
1340 dev_dbg(&intf->dev, "Ignoring descriptor: "
1341 "type %02x, length %d\n",
1342 buffer[2], buffer[0]);
1346 buflen -= buffer[0];
1347 buffer += buffer[0];
1350 if (!union_header) {
1351 if (call_interface_num > 0) {
1352 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n");
1353 /* quirks for Droids MuIn LCD */
1354 if (quirks & NO_DATA_INTERFACE)
1355 data_interface = usb_ifnum_to_if(usb_dev, 0);
1357 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = call_interface_num));
1358 control_interface = intf;
1360 if (intf->cur_altsetting->desc.bNumEndpoints != 3) {
1361 dev_dbg(&intf->dev,"No union descriptor, giving up\n");
1364 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n");
1365 combined_interfaces = 1;
1366 control_interface = data_interface = intf;
1367 goto look_for_collapsed_interface;
1371 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0);
1372 data_interface = usb_ifnum_to_if(usb_dev, (data_interface_num = union_header->bSlaveInterface0));
1373 if (!control_interface || !data_interface) {
1374 dev_dbg(&intf->dev, "no interfaces\n");
1379 if (data_interface_num != call_interface_num)
1380 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n");
1382 if (control_interface == data_interface) {
1383 /* some broken devices designed for windows work this way */
1384 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n");
1385 combined_interfaces = 1;
1386 /* a popular other OS doesn't use it */
1387 quirks |= NO_CAP_LINE;
1388 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) {
1389 dev_err(&intf->dev, "This needs exactly 3 endpoints\n");
1392 look_for_collapsed_interface:
1393 for (i = 0; i < 3; i++) {
1394 struct usb_endpoint_descriptor *ep;
1395 ep = &data_interface->cur_altsetting->endpoint[i].desc;
1397 if (usb_endpoint_is_int_in(ep))
1399 else if (usb_endpoint_is_bulk_out(ep))
1401 else if (usb_endpoint_is_bulk_in(ep))
1406 if (!epctrl || !epread || !epwrite)
1409 goto made_compressed_probe;
1412 /*workaround for switched interfaces */
1413 if (data_interface->cur_altsetting->desc.bInterfaceClass
1414 != CDC_DATA_INTERFACE_TYPE) {
1415 if (control_interface->cur_altsetting->desc.bInterfaceClass
1416 == CDC_DATA_INTERFACE_TYPE) {
1417 struct usb_interface *t;
1419 "Your device has switched interfaces.\n");
1420 t = control_interface;
1421 control_interface = data_interface;
1428 /* Accept probe requests only for the control interface */
1429 if (!combined_interfaces && intf != control_interface)
1432 if (!combined_interfaces && usb_interface_claimed(data_interface)) {
1433 /* valid in this context */
1434 dev_dbg(&intf->dev, "The data interface isn't available\n");
1439 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 ||
1440 control_interface->cur_altsetting->desc.bNumEndpoints == 0)
1443 epctrl = &control_interface->cur_altsetting->endpoint[0].desc;
1444 epread = &data_interface->cur_altsetting->endpoint[0].desc;
1445 epwrite = &data_interface->cur_altsetting->endpoint[1].desc;
1448 /* workaround for switched endpoints */
1449 if (!usb_endpoint_dir_in(epread)) {
1450 /* descriptors are swapped */
1451 struct usb_endpoint_descriptor *t;
1452 //dev_dbg(&intf->dev,
1453 // "The data interface has switched endpoints\n");
1458 made_compressed_probe:
1459 dev_dbg(&intf->dev, "interfaces are valid\n");
1461 xr21v141x = kzalloc(sizeof(struct xr21v141x), GFP_KERNEL);
1462 if (xr21v141x == NULL) {
1463 dev_err(&intf->dev, "out of memory (xr21v141x kzalloc)\n");
1467 minor = xr21v141x_alloc_minor(xr21v141x);
1468 if (minor == XR21V141X_TTY_MINORS) {
1469 dev_err(&intf->dev, "no more free xr21v141x devices\n");
1474 ctrlsize = usb_endpoint_maxp(epctrl);
1475 readsize = usb_endpoint_maxp(epread) *
1476 (quirks == SINGLE_RX_URB ? 1 : 2);
1477 xr21v141x->combined_interfaces = combined_interfaces;
1478 xr21v141x->writesize = usb_endpoint_maxp(epwrite) * 20;
1479 xr21v141x->control = control_interface;
1480 xr21v141x->data = data_interface;
1481 xr21v141x->minor = minor;
1482 xr21v141x->dev = usb_dev;
1483 xr21v141x->ctrl_caps = ac_management_function;
1484 if (quirks & NO_CAP_LINE)
1485 xr21v141x->ctrl_caps &= ~USB_CDC_CAP_LINE;
1486 xr21v141x->ctrlsize = ctrlsize;
1487 xr21v141x->readsize = readsize;
1488 xr21v141x->rx_buflimit = num_rx_buf;
1489 INIT_WORK(&xr21v141x->work, xr21v141x_softint);
1490 spin_lock_init(&xr21v141x->write_lock);
1491 spin_lock_init(&xr21v141x->read_lock);
1492 mutex_init(&xr21v141x->mutex);
1493 xr21v141x->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress);
1494 xr21v141x->is_int_ep = usb_endpoint_xfer_int(epread);
1495 if (xr21v141x->is_int_ep)
1496 xr21v141x->bInterval = epread->bInterval;
1497 tty_port_init(&xr21v141x->port);
1498 xr21v141x->port.ops = &xr21v141x_port_ops;
1500 xr21v141x->block = epwrite->bEndpointAddress - 1;
1502 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &xr21v141x->ctrl_dma);
1504 dev_err(&intf->dev, "out of memory (ctrl buffer alloc)\n");
1507 xr21v141x->ctrl_buffer = buf;
1509 if (xr21v141x_write_buffers_alloc(xr21v141x) < 0) {
1510 dev_err(&intf->dev, "out of memory (write buffer alloc)\n");
1514 xr21v141x->ctrlurb = usb_alloc_urb(0, GFP_KERNEL);
1515 if (!xr21v141x->ctrlurb) {
1516 dev_err(&intf->dev, "out of memory (ctrlurb kmalloc)\n");
1519 for (i = 0; i < num_rx_buf; i++) {
1520 struct xr21v141x_rb *rb = &(xr21v141x->read_buffers[i]);
1523 rb->base = usb_alloc_coherent(xr21v141x->dev, readsize, GFP_KERNEL,
1526 dev_err(&intf->dev, "out of memory "
1527 "(read bufs usb_alloc_coherent)\n");
1531 rb->instance = xr21v141x;
1533 urb = usb_alloc_urb(0, GFP_KERNEL);
1536 "out of memory (read urbs usb_alloc_urb)\n");
1539 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1540 urb->transfer_dma = rb->dma;
1541 if (xr21v141x->is_int_ep) {
1542 usb_fill_int_urb(urb, xr21v141x->dev,
1543 xr21v141x->rx_endpoint,
1545 xr21v141x->readsize,
1546 xr21v141x_read_bulk_callback, rb,
1547 xr21v141x->bInterval);
1549 usb_fill_bulk_urb(urb, xr21v141x->dev,
1550 xr21v141x->rx_endpoint,
1552 xr21v141x->readsize,
1553 xr21v141x_read_bulk_callback, rb);
1556 xr21v141x->read_urbs[i] = urb;
1557 __set_bit(i, &xr21v141x->read_urbs_free);
1559 for (i = 0; i < ACM_NW; i++) {
1560 struct xr21v141x_wb *snd = &(xr21v141x->wb[i]);
1562 snd->urb = usb_alloc_urb(0, GFP_KERNEL);
1563 if (snd->urb == NULL) {
1565 "out of memory (write urbs usb_alloc_urb)\n");
1569 if (usb_endpoint_xfer_int(epwrite))
1570 usb_fill_int_urb(snd->urb, usb_dev,
1571 usb_sndintpipe(usb_dev, epwrite->bEndpointAddress),
1572 NULL, xr21v141x->writesize, xr21v141x_write_bulk, snd, epwrite->bInterval);
1574 usb_fill_bulk_urb(snd->urb, usb_dev,
1575 usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress),
1576 NULL, xr21v141x->writesize, xr21v141x_write_bulk, snd);
1577 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1578 snd->instance = xr21v141x;
1581 usb_set_intfdata(intf, xr21v141x);
1583 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities);
1587 if (cfd) { /* export the country data */
1588 xr21v141x->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL);
1589 if (!xr21v141x->country_codes)
1590 goto skip_countries;
1591 xr21v141x->country_code_size = cfd->bLength - 4;
1592 memcpy(xr21v141x->country_codes, (u8 *)&cfd->wCountyCode0,
1594 xr21v141x->country_rel_date = cfd->iCountryCodeRelDate;
1596 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);
1598 kfree(xr21v141x->country_codes);
1599 xr21v141x->country_codes = NULL;
1600 xr21v141x->country_code_size = 0;
1601 goto skip_countries;
1604 i = device_create_file(&intf->dev,
1605 &dev_attr_iCountryCodeRelDate);
1607 device_remove_file(&intf->dev, &dev_attr_wCountryCodes);
1608 kfree(xr21v141x->country_codes);
1609 xr21v141x->country_codes = NULL;
1610 xr21v141x->country_code_size = 0;
1611 goto skip_countries;
1616 usb_fill_int_urb(xr21v141x->ctrlurb, usb_dev,
1617 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress),
1618 xr21v141x->ctrl_buffer, ctrlsize, xr21v141x_ctrl_irq, xr21v141x,
1619 /* works around buggy devices */
1620 epctrl->bInterval ? epctrl->bInterval : 0xff);
1621 xr21v141x->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1622 xr21v141x->ctrlurb->transfer_dma = xr21v141x->ctrl_dma;
1624 dev_info(&intf->dev, "ttyUSB%d: XR21v14x usb uart device\n", minor);
1626 xr21v141x_set_control(xr21v141x, xr21v141x->ctrlout);
1628 xr21v141x->line.dwDTERate = cpu_to_le32(9600);
1629 xr21v141x->line.bDataBits = 8;
1630 xr21v141x_set_line(xr21v141x, &xr21v141x->line);
1632 usb_driver_claim_interface(&xr21v141x_driver, data_interface, xr21v141x);
1633 usb_set_intfdata(data_interface, xr21v141x);
1635 usb_get_intf(control_interface);
1636 tty_register_device(xr21v141x_tty_driver, minor, &control_interface->dev);
1640 for (i = 0; i < ACM_NW; i++)
1641 usb_free_urb(xr21v141x->wb[i].urb);
1643 for (i = 0; i < num_rx_buf; i++)
1644 usb_free_urb(xr21v141x->read_urbs[i]);
1645 xr21v141x_read_buffers_free(xr21v141x);
1646 usb_free_urb(xr21v141x->ctrlurb);
1648 xr21v141x_write_buffers_free(xr21v141x);
1650 usb_free_coherent(usb_dev, ctrlsize, xr21v141x->ctrl_buffer, xr21v141x->ctrl_dma);
1652 xr21v141x_release_minor(xr21v141x);
1658 static void stop_data_traffic(struct xr21v141x *xr21v141x)
1662 dev_dbg(&xr21v141x->control->dev, "%s\n", __func__);
1664 usb_kill_urb(xr21v141x->ctrlurb);
1665 for (i = 0; i < ACM_NW; i++)
1666 usb_kill_urb(xr21v141x->wb[i].urb);
1667 for (i = 0; i < xr21v141x->rx_buflimit; i++)
1668 usb_kill_urb(xr21v141x->read_urbs[i]);
1670 cancel_work_sync(&xr21v141x->work);
1673 static void xr21v141x_disconnect(struct usb_interface *intf)
1675 struct xr21v141x *xr21v141x = usb_get_intfdata(intf);
1676 struct usb_device *usb_dev = interface_to_usbdev(intf);
1677 struct tty_struct *tty;
1680 dev_dbg(&intf->dev, "%s\n", __func__);
1682 /* sibling interface is already cleaning up */
1686 mutex_lock(&xr21v141x->mutex);
1687 xr21v141x->disconnected = true;
1688 if (xr21v141x->country_codes) {
1689 device_remove_file(&xr21v141x->control->dev,
1690 &dev_attr_wCountryCodes);
1691 device_remove_file(&xr21v141x->control->dev,
1692 &dev_attr_iCountryCodeRelDate);
1694 device_remove_file(&xr21v141x->control->dev, &dev_attr_bmCapabilities);
1695 usb_set_intfdata(xr21v141x->control, NULL);
1696 usb_set_intfdata(xr21v141x->data, NULL);
1697 mutex_unlock(&xr21v141x->mutex);
1699 tty = tty_port_tty_get(&xr21v141x->port);
1705 stop_data_traffic(xr21v141x);
1707 usb_free_urb(xr21v141x->ctrlurb);
1708 for (i = 0; i < ACM_NW; i++)
1709 usb_free_urb(xr21v141x->wb[i].urb);
1710 for (i = 0; i < xr21v141x->rx_buflimit; i++)
1711 usb_free_urb(xr21v141x->read_urbs[i]);
1712 xr21v141x_write_buffers_free(xr21v141x);
1713 usb_free_coherent(usb_dev, xr21v141x->ctrlsize, xr21v141x->ctrl_buffer, xr21v141x->ctrl_dma);
1714 xr21v141x_read_buffers_free(xr21v141x);
1716 if (!xr21v141x->combined_interfaces)
1717 usb_driver_release_interface(&xr21v141x_driver, intf == xr21v141x->control ?
1718 xr21v141x->data : xr21v141x->control);
1720 tty_port_put(&xr21v141x->port);
1724 static int xr21v141x_suspend(struct usb_interface *intf, pm_message_t message)
1726 struct xr21v141x *xr21v141x = usb_get_intfdata(intf);
1729 if (PMSG_IS_AUTO(message)) {
1732 spin_lock_irq(&xr21v141x->write_lock);
1733 b = xr21v141x->transmitting;
1734 spin_unlock_irq(&xr21v141x->write_lock);
1739 spin_lock_irq(&xr21v141x->read_lock);
1740 spin_lock(&xr21v141x->write_lock);
1741 cnt = xr21v141x->susp_count++;
1742 spin_unlock(&xr21v141x->write_lock);
1743 spin_unlock_irq(&xr21v141x->read_lock);
1748 if (test_bit(ASYNCB_INITIALIZED, &xr21v141x->port.flags))
1749 stop_data_traffic(xr21v141x);
1754 static int xr21v141x_resume(struct usb_interface *intf)
1756 struct xr21v141x *xr21v141x = usb_get_intfdata(intf);
1757 struct xr21v141x_wb *wb;
1761 spin_lock_irq(&xr21v141x->read_lock);
1762 xr21v141x->susp_count -= 1;
1763 cnt = xr21v141x->susp_count;
1764 spin_unlock_irq(&xr21v141x->read_lock);
1769 if (test_bit(ASYNCB_INITIALIZED, &xr21v141x->port.flags)) {
1770 rv = usb_submit_urb(xr21v141x->ctrlurb, GFP_NOIO);
1772 spin_lock_irq(&xr21v141x->write_lock);
1773 if (xr21v141x->delayed_wb) {
1774 wb = xr21v141x->delayed_wb;
1775 xr21v141x->delayed_wb = NULL;
1776 spin_unlock_irq(&xr21v141x->write_lock);
1777 xr21v141x_start_wb(xr21v141x, wb);
1779 spin_unlock_irq(&xr21v141x->write_lock);
1783 * delayed error checking because we must
1784 * do the write path at all cost
1789 rv = xr21v141x_submit_read_urbs(xr21v141x, GFP_NOIO);
1796 static int xr21v141x_reset_resume(struct usb_interface *intf)
1798 struct xr21v141x *xr21v141x = usb_get_intfdata(intf);
1799 struct tty_struct *tty;
1801 if (test_bit(ASYNCB_INITIALIZED, &xr21v141x->port.flags)) {
1802 tty = tty_port_tty_get(&xr21v141x->port);
1809 return xr21v141x_resume(intf);
1812 #endif /* CONFIG_PM */
1815 * USB driver structure.
1818 static const struct usb_device_id xrusb_ids[] = {
1819 { USB_DEVICE(0x04e2, 0x1410),
1821 { USB_DEVICE(0x04e2, 0x1412),
1823 { USB_DEVICE(0x04e2, 0x1414),
1828 MODULE_DEVICE_TABLE(usb, xrusb_ids);
1830 static struct usb_driver xr21v141x_driver = {
1832 .probe = xr21v141x_probe,
1833 .disconnect = xr21v141x_disconnect,
1835 .suspend = xr21v141x_suspend,
1836 .resume = xr21v141x_resume,
1837 .reset_resume = xr21v141x_reset_resume,
1839 .id_table = xrusb_ids,
1841 .supports_autosuspend = 1,
1843 .disable_hub_initiated_lpm = 1,
1847 * TTY driver structures.
1850 static const struct tty_operations xr21v141x_ops = {
1851 .install = xr21v141x_tty_install,
1852 .open = xr21v141x_tty_open,
1853 .close = xr21v141x_tty_close,
1854 .cleanup = xr21v141x_tty_cleanup,
1855 .hangup = xr21v141x_tty_hangup,
1856 .write = xr21v141x_tty_write,
1857 .write_room = xr21v141x_tty_write_room,
1858 .ioctl = xr21v141x_tty_ioctl,
1859 .throttle = xr21v141x_tty_throttle,
1860 .unthrottle = xr21v141x_tty_unthrottle,
1861 .chars_in_buffer = xr21v141x_tty_chars_in_buffer,
1862 .break_ctl = xr21v141x_tty_break_ctl,
1863 .set_termios = xr21v141x_tty_set_termios,
1864 .tiocmget = xr21v141x_tty_tiocmget,
1865 .tiocmset = xr21v141x_tty_tiocmset,
1872 static int __init xr21v141x_init(void)
1875 xr21v141x_tty_driver = alloc_tty_driver(XR21V141X_TTY_MINORS);
1876 if (!xr21v141x_tty_driver)
1878 xr21v141x_tty_driver->driver_name = "vizzini",
1879 xr21v141x_tty_driver->name = "ttyUSB",
1880 xr21v141x_tty_driver->major = XR21V141X_TTY_MAJOR,
1881 xr21v141x_tty_driver->minor_start = 0,
1882 xr21v141x_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
1883 xr21v141x_tty_driver->subtype = SERIAL_TYPE_NORMAL,
1884 xr21v141x_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1885 xr21v141x_tty_driver->init_termios = tty_std_termios;
1886 xr21v141x_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
1888 tty_set_operations(xr21v141x_tty_driver, &xr21v141x_ops);
1890 retval = tty_register_driver(xr21v141x_tty_driver);
1892 put_tty_driver(xr21v141x_tty_driver);
1896 retval = usb_register(&xr21v141x_driver);
1898 tty_unregister_driver(xr21v141x_tty_driver);
1899 put_tty_driver(xr21v141x_tty_driver);
1903 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1908 static void __exit xr21v141x_exit(void)
1910 usb_deregister(&xr21v141x_driver);
1911 tty_unregister_driver(xr21v141x_tty_driver);
1912 put_tty_driver(xr21v141x_tty_driver);
1915 module_init(xr21v141x_init);
1916 module_exit(xr21v141x_exit);
1918 MODULE_AUTHOR(DRIVER_AUTHOR);
1919 MODULE_DESCRIPTION(DRIVER_DESC);
1920 MODULE_LICENSE("GPL");
1921 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR);