Commit | Line | Data |
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49cdee0e KL |
1 | /* |
2 | * Ours Technology Inc. OTi-6858 USB to serial adapter driver. | |
3 | * | |
4 | * Copyleft (C) 2007 Kees Lemmens (adapted for kernel 2.6.20) | |
5 | * Copyright (C) 2006 Tomasz Michal Lukaszewski (FIXME: add e-mail) | |
6 | * Copyright (C) 2001-2004 Greg Kroah-Hartman (greg@kroah.com) | |
7 | * Copyright (C) 2003 IBM Corp. | |
8 | * | |
9 | * Many thanks to the authors of pl2303 driver: all functions in this file | |
10 | * are heavily based on pl2303 code, buffering code is a 1-to-1 copy. | |
11 | * | |
12 | * Warning! You use this driver on your own risk! The only official | |
13 | * description of this device I have is datasheet from manufacturer, | |
14 | * and it doesn't contain almost any information needed to write a driver. | |
15 | * Almost all knowlegde used while writing this driver was gathered by: | |
16 | * - analyzing traffic between device and the M$ Windows 2000 driver, | |
17 | * - trying different bit combinations and checking pin states | |
18 | * with a voltmeter, | |
19 | * - receiving malformed frames and producing buffer overflows | |
20 | * to learn how errors are reported, | |
21 | * So, THIS CODE CAN DESTROY OTi-6858 AND ANY OTHER DEVICES, THAT ARE | |
22 | * CONNECTED TO IT! | |
23 | * | |
24 | * This program is free software; you can redistribute it and/or modify | |
25 | * it under the terms of the GNU General Public License as published by | |
26 | * the Free Software Foundation; either version 2 of the License. | |
27 | * | |
2a77c814 AC |
28 | * See Documentation/usb/usb-serial.txt for more information on using this |
29 | * driver | |
49cdee0e KL |
30 | * |
31 | * TODO: | |
32 | * - implement correct flushing for ioctls and oti6858_close() | |
33 | * - check how errors (rx overflow, parity error, framing error) are reported | |
34 | * - implement oti6858_break_ctl() | |
35 | * - implement more ioctls | |
36 | * - test/implement flow control | |
37 | * - allow setting custom baud rates | |
38 | */ | |
39 | ||
40 | #include <linux/kernel.h> | |
41 | #include <linux/errno.h> | |
42 | #include <linux/init.h> | |
43 | #include <linux/slab.h> | |
44 | #include <linux/tty.h> | |
45 | #include <linux/tty_driver.h> | |
46 | #include <linux/tty_flip.h> | |
47 | #include <linux/serial.h> | |
48 | #include <linux/module.h> | |
49 | #include <linux/moduleparam.h> | |
50 | #include <linux/spinlock.h> | |
51 | #include <linux/usb.h> | |
52 | #include <linux/usb/serial.h> | |
2a77c814 | 53 | #include <linux/uaccess.h> |
e3c1803f | 54 | #include <linux/kfifo.h> |
49cdee0e KL |
55 | #include "oti6858.h" |
56 | ||
57 | #define OTI6858_DESCRIPTION \ | |
58 | "Ours Technology Inc. OTi-6858 USB to serial adapter driver" | |
59 | #define OTI6858_AUTHOR "Tomasz Michal Lukaszewski <FIXME@FIXME>" | |
e3c1803f | 60 | #define OTI6858_VERSION "0.2" |
49cdee0e | 61 | |
7d40d7e8 | 62 | static const struct usb_device_id id_table[] = { |
49cdee0e KL |
63 | { USB_DEVICE(OTI6858_VENDOR_ID, OTI6858_PRODUCT_ID) }, |
64 | { } | |
65 | }; | |
66 | ||
67 | MODULE_DEVICE_TABLE(usb, id_table); | |
68 | ||
69 | static struct usb_driver oti6858_driver = { | |
70 | .name = "oti6858", | |
71 | .probe = usb_serial_probe, | |
72 | .disconnect = usb_serial_disconnect, | |
73 | .id_table = id_table, | |
74 | .no_dynamic_id = 1, | |
75 | }; | |
76 | ||
77 | static int debug; | |
78 | ||
49cdee0e KL |
79 | /* requests */ |
80 | #define OTI6858_REQ_GET_STATUS (USB_DIR_IN | USB_TYPE_VENDOR | 0x00) | |
81 | #define OTI6858_REQ_T_GET_STATUS 0x01 | |
82 | ||
83 | #define OTI6858_REQ_SET_LINE (USB_DIR_OUT | USB_TYPE_VENDOR | 0x00) | |
84 | #define OTI6858_REQ_T_SET_LINE 0x00 | |
85 | ||
86 | #define OTI6858_REQ_CHECK_TXBUFF (USB_DIR_IN | USB_TYPE_VENDOR | 0x01) | |
87 | #define OTI6858_REQ_T_CHECK_TXBUFF 0x00 | |
88 | ||
89 | /* format of the control packet */ | |
90 | struct oti6858_control_pkt { | |
fd05e720 | 91 | __le16 divisor; /* baud rate = 96000000 / (16 * divisor), LE */ |
49cdee0e KL |
92 | #define OTI6858_MAX_BAUD_RATE 3000000 |
93 | u8 frame_fmt; | |
94 | #define FMT_STOP_BITS_MASK 0xc0 | |
95 | #define FMT_STOP_BITS_1 0x00 | |
96 | #define FMT_STOP_BITS_2 0x40 /* 1.5 stop bits if FMT_DATA_BITS_5 */ | |
97 | #define FMT_PARITY_MASK 0x38 | |
98 | #define FMT_PARITY_NONE 0x00 | |
99 | #define FMT_PARITY_ODD 0x08 | |
100 | #define FMT_PARITY_EVEN 0x18 | |
101 | #define FMT_PARITY_MARK 0x28 | |
102 | #define FMT_PARITY_SPACE 0x38 | |
103 | #define FMT_DATA_BITS_MASK 0x03 | |
104 | #define FMT_DATA_BITS_5 0x00 | |
105 | #define FMT_DATA_BITS_6 0x01 | |
106 | #define FMT_DATA_BITS_7 0x02 | |
107 | #define FMT_DATA_BITS_8 0x03 | |
108 | u8 something; /* always equals 0x43 */ | |
109 | u8 control; /* settings of flow control lines */ | |
110 | #define CONTROL_MASK 0x0c | |
111 | #define CONTROL_DTR_HIGH 0x08 | |
112 | #define CONTROL_RTS_HIGH 0x04 | |
113 | u8 tx_status; | |
114 | #define TX_BUFFER_EMPTIED 0x09 | |
115 | u8 pin_state; | |
116 | #define PIN_MASK 0x3f | |
117 | #define PIN_RTS 0x20 /* output pin */ | |
118 | #define PIN_CTS 0x10 /* input pin, active low */ | |
119 | #define PIN_DSR 0x08 /* input pin, active low */ | |
120 | #define PIN_DTR 0x04 /* output pin */ | |
121 | #define PIN_RI 0x02 /* input pin, active low */ | |
122 | #define PIN_DCD 0x01 /* input pin, active low */ | |
123 | u8 rx_bytes_avail; /* number of bytes in rx buffer */; | |
124 | }; | |
125 | ||
126 | #define OTI6858_CTRL_PKT_SIZE sizeof(struct oti6858_control_pkt) | |
127 | #define OTI6858_CTRL_EQUALS_PENDING(a, priv) \ | |
2a77c814 | 128 | (((a)->divisor == (priv)->pending_setup.divisor) \ |
49cdee0e | 129 | && ((a)->control == (priv)->pending_setup.control) \ |
2a77c814 | 130 | && ((a)->frame_fmt == (priv)->pending_setup.frame_fmt)) |
49cdee0e KL |
131 | |
132 | /* function prototypes */ | |
a509a7e4 | 133 | static int oti6858_open(struct tty_struct *tty, struct usb_serial_port *port); |
335f8514 | 134 | static void oti6858_close(struct usb_serial_port *port); |
95da310e AC |
135 | static void oti6858_set_termios(struct tty_struct *tty, |
136 | struct usb_serial_port *port, struct ktermios *old); | |
fe1ae7fd | 137 | static void oti6858_init_termios(struct tty_struct *tty); |
95da310e | 138 | static int oti6858_ioctl(struct tty_struct *tty, struct file *file, |
49cdee0e KL |
139 | unsigned int cmd, unsigned long arg); |
140 | static void oti6858_read_int_callback(struct urb *urb); | |
141 | static void oti6858_read_bulk_callback(struct urb *urb); | |
142 | static void oti6858_write_bulk_callback(struct urb *urb); | |
95da310e | 143 | static int oti6858_write(struct tty_struct *tty, struct usb_serial_port *port, |
49cdee0e | 144 | const unsigned char *buf, int count); |
95da310e AC |
145 | static int oti6858_write_room(struct tty_struct *tty); |
146 | static int oti6858_chars_in_buffer(struct tty_struct *tty); | |
147 | static int oti6858_tiocmget(struct tty_struct *tty, struct file *file); | |
148 | static int oti6858_tiocmset(struct tty_struct *tty, struct file *file, | |
49cdee0e KL |
149 | unsigned int set, unsigned int clear); |
150 | static int oti6858_startup(struct usb_serial *serial); | |
f9c99bb8 | 151 | static void oti6858_release(struct usb_serial *serial); |
49cdee0e | 152 | |
49cdee0e KL |
153 | /* device info */ |
154 | static struct usb_serial_driver oti6858_device = { | |
155 | .driver = { | |
156 | .owner = THIS_MODULE, | |
157 | .name = "oti6858", | |
158 | }, | |
159 | .id_table = id_table, | |
49cdee0e KL |
160 | .num_ports = 1, |
161 | .open = oti6858_open, | |
162 | .close = oti6858_close, | |
163 | .write = oti6858_write, | |
164 | .ioctl = oti6858_ioctl, | |
49cdee0e | 165 | .set_termios = oti6858_set_termios, |
fe1ae7fd | 166 | .init_termios = oti6858_init_termios, |
49cdee0e KL |
167 | .tiocmget = oti6858_tiocmget, |
168 | .tiocmset = oti6858_tiocmset, | |
169 | .read_bulk_callback = oti6858_read_bulk_callback, | |
170 | .read_int_callback = oti6858_read_int_callback, | |
171 | .write_bulk_callback = oti6858_write_bulk_callback, | |
172 | .write_room = oti6858_write_room, | |
173 | .chars_in_buffer = oti6858_chars_in_buffer, | |
174 | .attach = oti6858_startup, | |
f9c99bb8 | 175 | .release = oti6858_release, |
49cdee0e KL |
176 | }; |
177 | ||
178 | struct oti6858_private { | |
179 | spinlock_t lock; | |
180 | ||
49cdee0e KL |
181 | struct oti6858_control_pkt status; |
182 | ||
183 | struct { | |
184 | u8 read_urb_in_use; | |
185 | u8 write_urb_in_use; | |
49cdee0e KL |
186 | } flags; |
187 | struct delayed_work delayed_write_work; | |
188 | ||
189 | struct { | |
fd05e720 | 190 | __le16 divisor; |
49cdee0e KL |
191 | u8 frame_fmt; |
192 | u8 control; | |
193 | } pending_setup; | |
194 | u8 transient; | |
195 | u8 setup_done; | |
196 | struct delayed_work delayed_setup_work; | |
197 | ||
198 | wait_queue_head_t intr_wait; | |
2a77c814 | 199 | struct usb_serial_port *port; /* USB port with which associated */ |
49cdee0e KL |
200 | }; |
201 | ||
49cdee0e KL |
202 | static void setup_line(struct work_struct *work) |
203 | { | |
2a77c814 AC |
204 | struct oti6858_private *priv = container_of(work, |
205 | struct oti6858_private, delayed_setup_work.work); | |
49cdee0e KL |
206 | struct usb_serial_port *port = priv->port; |
207 | struct oti6858_control_pkt *new_setup; | |
208 | unsigned long flags; | |
209 | int result; | |
210 | ||
441b62c1 | 211 | dbg("%s(port = %d)", __func__, port->number); |
49cdee0e | 212 | |
2a77c814 AC |
213 | new_setup = kmalloc(OTI6858_CTRL_PKT_SIZE, GFP_KERNEL); |
214 | if (new_setup == NULL) { | |
441b62c1 | 215 | dev_err(&port->dev, "%s(): out of memory!\n", __func__); |
49cdee0e | 216 | /* we will try again */ |
2a77c814 AC |
217 | schedule_delayed_work(&priv->delayed_setup_work, |
218 | msecs_to_jiffies(2)); | |
49cdee0e KL |
219 | return; |
220 | } | |
221 | ||
222 | result = usb_control_msg(port->serial->dev, | |
223 | usb_rcvctrlpipe(port->serial->dev, 0), | |
224 | OTI6858_REQ_T_GET_STATUS, | |
225 | OTI6858_REQ_GET_STATUS, | |
226 | 0, 0, | |
227 | new_setup, OTI6858_CTRL_PKT_SIZE, | |
228 | 100); | |
229 | ||
230 | if (result != OTI6858_CTRL_PKT_SIZE) { | |
441b62c1 | 231 | dev_err(&port->dev, "%s(): error reading status\n", __func__); |
49cdee0e KL |
232 | kfree(new_setup); |
233 | /* we will try again */ | |
2a77c814 AC |
234 | schedule_delayed_work(&priv->delayed_setup_work, |
235 | msecs_to_jiffies(2)); | |
49cdee0e KL |
236 | return; |
237 | } | |
238 | ||
239 | spin_lock_irqsave(&priv->lock, flags); | |
240 | if (!OTI6858_CTRL_EQUALS_PENDING(new_setup, priv)) { | |
241 | new_setup->divisor = priv->pending_setup.divisor; | |
242 | new_setup->control = priv->pending_setup.control; | |
243 | new_setup->frame_fmt = priv->pending_setup.frame_fmt; | |
244 | ||
245 | spin_unlock_irqrestore(&priv->lock, flags); | |
246 | result = usb_control_msg(port->serial->dev, | |
247 | usb_sndctrlpipe(port->serial->dev, 0), | |
248 | OTI6858_REQ_T_SET_LINE, | |
249 | OTI6858_REQ_SET_LINE, | |
250 | 0, 0, | |
251 | new_setup, OTI6858_CTRL_PKT_SIZE, | |
252 | 100); | |
253 | } else { | |
254 | spin_unlock_irqrestore(&priv->lock, flags); | |
255 | result = 0; | |
256 | } | |
257 | kfree(new_setup); | |
258 | ||
259 | spin_lock_irqsave(&priv->lock, flags); | |
260 | if (result != OTI6858_CTRL_PKT_SIZE) | |
261 | priv->transient = 0; | |
262 | priv->setup_done = 1; | |
263 | spin_unlock_irqrestore(&priv->lock, flags); | |
264 | ||
441b62c1 | 265 | dbg("%s(): submitting interrupt urb", __func__); |
49cdee0e | 266 | port->interrupt_in_urb->dev = port->serial->dev; |
40d28582 | 267 | result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
49cdee0e KL |
268 | if (result != 0) { |
269 | dev_err(&port->dev, "%s(): usb_submit_urb() failed" | |
441b62c1 | 270 | " with error %d\n", __func__, result); |
49cdee0e KL |
271 | } |
272 | } | |
273 | ||
7d7917bc | 274 | static void send_data(struct work_struct *work) |
49cdee0e | 275 | { |
2a77c814 AC |
276 | struct oti6858_private *priv = container_of(work, |
277 | struct oti6858_private, delayed_write_work.work); | |
49cdee0e KL |
278 | struct usb_serial_port *port = priv->port; |
279 | int count = 0, result; | |
280 | unsigned long flags; | |
d2126326 | 281 | u8 *allow; |
49cdee0e | 282 | |
441b62c1 | 283 | dbg("%s(port = %d)", __func__, port->number); |
49cdee0e KL |
284 | |
285 | spin_lock_irqsave(&priv->lock, flags); | |
286 | if (priv->flags.write_urb_in_use) { | |
287 | spin_unlock_irqrestore(&priv->lock, flags); | |
2a77c814 AC |
288 | schedule_delayed_work(&priv->delayed_write_work, |
289 | msecs_to_jiffies(2)); | |
49cdee0e KL |
290 | return; |
291 | } | |
292 | priv->flags.write_urb_in_use = 1; | |
49cdee0e | 293 | spin_unlock_irqrestore(&priv->lock, flags); |
28f27dcb JH |
294 | |
295 | spin_lock_irqsave(&port->lock, flags); | |
296 | count = kfifo_len(&port->write_fifo); | |
297 | spin_unlock_irqrestore(&port->lock, flags); | |
298 | ||
49cdee0e KL |
299 | if (count > port->bulk_out_size) |
300 | count = port->bulk_out_size; | |
301 | ||
302 | if (count != 0) { | |
d2126326 JH |
303 | allow = kmalloc(1, GFP_KERNEL); |
304 | if (!allow) { | |
305 | dev_err(&port->dev, "%s(): kmalloc failed\n", | |
306 | __func__); | |
307 | return; | |
308 | } | |
49cdee0e KL |
309 | result = usb_control_msg(port->serial->dev, |
310 | usb_rcvctrlpipe(port->serial->dev, 0), | |
311 | OTI6858_REQ_T_CHECK_TXBUFF, | |
312 | OTI6858_REQ_CHECK_TXBUFF, | |
d2126326 JH |
313 | count, 0, allow, 1, 100); |
314 | if (result != 1 || *allow != 0) | |
49cdee0e | 315 | count = 0; |
d2126326 | 316 | kfree(allow); |
49cdee0e KL |
317 | } |
318 | ||
319 | if (count == 0) { | |
320 | priv->flags.write_urb_in_use = 0; | |
321 | ||
441b62c1 | 322 | dbg("%s(): submitting interrupt urb", __func__); |
49cdee0e | 323 | port->interrupt_in_urb->dev = port->serial->dev; |
40d28582 | 324 | result = usb_submit_urb(port->interrupt_in_urb, GFP_NOIO); |
49cdee0e KL |
325 | if (result != 0) { |
326 | dev_err(&port->dev, "%s(): usb_submit_urb() failed" | |
441b62c1 | 327 | " with error %d\n", __func__, result); |
49cdee0e KL |
328 | } |
329 | return; | |
330 | } | |
331 | ||
28f27dcb | 332 | count = kfifo_out_locked(&port->write_fifo, |
e3c1803f | 333 | port->write_urb->transfer_buffer, |
28f27dcb | 334 | count, &port->lock); |
49cdee0e KL |
335 | port->write_urb->transfer_buffer_length = count; |
336 | port->write_urb->dev = port->serial->dev; | |
40d28582 | 337 | result = usb_submit_urb(port->write_urb, GFP_NOIO); |
49cdee0e KL |
338 | if (result != 0) { |
339 | dev_err(&port->dev, "%s(): usb_submit_urb() failed" | |
441b62c1 | 340 | " with error %d\n", __func__, result); |
49cdee0e KL |
341 | priv->flags.write_urb_in_use = 0; |
342 | } | |
343 | ||
344 | usb_serial_port_softint(port); | |
345 | } | |
346 | ||
347 | static int oti6858_startup(struct usb_serial *serial) | |
348 | { | |
2a77c814 AC |
349 | struct usb_serial_port *port = serial->port[0]; |
350 | struct oti6858_private *priv; | |
49cdee0e KL |
351 | int i; |
352 | ||
353 | for (i = 0; i < serial->num_ports; ++i) { | |
354 | priv = kzalloc(sizeof(struct oti6858_private), GFP_KERNEL); | |
355 | if (!priv) | |
356 | break; | |
49cdee0e KL |
357 | |
358 | spin_lock_init(&priv->lock); | |
359 | init_waitqueue_head(&priv->intr_wait); | |
2a77c814 AC |
360 | /* INIT_WORK(&priv->setup_work, setup_line, serial->port[i]); */ |
361 | /* INIT_WORK(&priv->write_work, send_data, serial->port[i]); */ | |
49cdee0e KL |
362 | priv->port = port; |
363 | INIT_DELAYED_WORK(&priv->delayed_setup_work, setup_line); | |
364 | INIT_DELAYED_WORK(&priv->delayed_write_work, send_data); | |
365 | ||
366 | usb_set_serial_port_data(serial->port[i], priv); | |
367 | } | |
368 | if (i == serial->num_ports) | |
369 | return 0; | |
370 | ||
371 | for (--i; i >= 0; --i) { | |
372 | priv = usb_get_serial_port_data(serial->port[i]); | |
49cdee0e KL |
373 | kfree(priv); |
374 | usb_set_serial_port_data(serial->port[i], NULL); | |
375 | } | |
376 | return -ENOMEM; | |
377 | } | |
378 | ||
95da310e | 379 | static int oti6858_write(struct tty_struct *tty, struct usb_serial_port *port, |
49cdee0e KL |
380 | const unsigned char *buf, int count) |
381 | { | |
441b62c1 | 382 | dbg("%s(port = %d, count = %d)", __func__, port->number, count); |
49cdee0e KL |
383 | |
384 | if (!count) | |
385 | return count; | |
386 | ||
28f27dcb | 387 | count = kfifo_in_locked(&port->write_fifo, buf, count, &port->lock); |
49cdee0e KL |
388 | |
389 | return count; | |
390 | } | |
391 | ||
95da310e | 392 | static int oti6858_write_room(struct tty_struct *tty) |
49cdee0e | 393 | { |
95da310e | 394 | struct usb_serial_port *port = tty->driver_data; |
49cdee0e KL |
395 | int room = 0; |
396 | unsigned long flags; | |
397 | ||
441b62c1 | 398 | dbg("%s(port = %d)", __func__, port->number); |
49cdee0e | 399 | |
28f27dcb JH |
400 | spin_lock_irqsave(&port->lock, flags); |
401 | room = kfifo_avail(&port->write_fifo); | |
402 | spin_unlock_irqrestore(&port->lock, flags); | |
49cdee0e KL |
403 | |
404 | return room; | |
405 | } | |
406 | ||
95da310e | 407 | static int oti6858_chars_in_buffer(struct tty_struct *tty) |
49cdee0e | 408 | { |
95da310e | 409 | struct usb_serial_port *port = tty->driver_data; |
49cdee0e KL |
410 | int chars = 0; |
411 | unsigned long flags; | |
412 | ||
441b62c1 | 413 | dbg("%s(port = %d)", __func__, port->number); |
49cdee0e | 414 | |
28f27dcb JH |
415 | spin_lock_irqsave(&port->lock, flags); |
416 | chars = kfifo_len(&port->write_fifo); | |
417 | spin_unlock_irqrestore(&port->lock, flags); | |
49cdee0e KL |
418 | |
419 | return chars; | |
420 | } | |
421 | ||
fe1ae7fd AC |
422 | static void oti6858_init_termios(struct tty_struct *tty) |
423 | { | |
424 | *(tty->termios) = tty_std_termios; | |
425 | tty->termios->c_cflag = B38400 | CS8 | CREAD | HUPCL | CLOCAL; | |
426 | tty->termios->c_ispeed = 38400; | |
427 | tty->termios->c_ospeed = 38400; | |
428 | } | |
429 | ||
95da310e AC |
430 | static void oti6858_set_termios(struct tty_struct *tty, |
431 | struct usb_serial_port *port, struct ktermios *old_termios) | |
49cdee0e KL |
432 | { |
433 | struct oti6858_private *priv = usb_get_serial_port_data(port); | |
434 | unsigned long flags; | |
435 | unsigned int cflag; | |
436 | u8 frame_fmt, control; | |
fd05e720 | 437 | __le16 divisor; |
49cdee0e KL |
438 | int br; |
439 | ||
441b62c1 | 440 | dbg("%s(port = %d)", __func__, port->number); |
49cdee0e | 441 | |
95da310e | 442 | if (!tty) { |
441b62c1 | 443 | dbg("%s(): no tty structures", __func__); |
49cdee0e KL |
444 | return; |
445 | } | |
446 | ||
95da310e | 447 | cflag = tty->termios->c_cflag; |
49cdee0e KL |
448 | |
449 | spin_lock_irqsave(&priv->lock, flags); | |
450 | divisor = priv->pending_setup.divisor; | |
451 | frame_fmt = priv->pending_setup.frame_fmt; | |
452 | control = priv->pending_setup.control; | |
453 | spin_unlock_irqrestore(&priv->lock, flags); | |
454 | ||
455 | frame_fmt &= ~FMT_DATA_BITS_MASK; | |
456 | switch (cflag & CSIZE) { | |
2a77c814 AC |
457 | case CS5: |
458 | frame_fmt |= FMT_DATA_BITS_5; | |
459 | break; | |
460 | case CS6: | |
461 | frame_fmt |= FMT_DATA_BITS_6; | |
462 | break; | |
463 | case CS7: | |
464 | frame_fmt |= FMT_DATA_BITS_7; | |
465 | break; | |
466 | default: | |
467 | case CS8: | |
468 | frame_fmt |= FMT_DATA_BITS_8; | |
469 | break; | |
49cdee0e KL |
470 | } |
471 | ||
472 | /* manufacturer claims that this device can work with baud rates | |
473 | * up to 3 Mbps; I've tested it only on 115200 bps, so I can't | |
474 | * guarantee that any other baud rate will work (especially | |
475 | * the higher ones) | |
476 | */ | |
95da310e | 477 | br = tty_get_baud_rate(tty); |
49cdee0e KL |
478 | if (br == 0) { |
479 | divisor = 0; | |
b0a239da | 480 | } else { |
49cdee0e | 481 | int real_br; |
fd05e720 | 482 | int new_divisor; |
b0a239da | 483 | br = min(br, OTI6858_MAX_BAUD_RATE); |
49cdee0e | 484 | |
fd05e720 AV |
485 | new_divisor = (96000000 + 8 * br) / (16 * br); |
486 | real_br = 96000000 / (16 * new_divisor); | |
487 | divisor = cpu_to_le16(new_divisor); | |
95da310e | 488 | tty_encode_baud_rate(tty, real_br, real_br); |
49cdee0e KL |
489 | } |
490 | ||
491 | frame_fmt &= ~FMT_STOP_BITS_MASK; | |
2a77c814 | 492 | if ((cflag & CSTOPB) != 0) |
49cdee0e | 493 | frame_fmt |= FMT_STOP_BITS_2; |
2a77c814 | 494 | else |
49cdee0e | 495 | frame_fmt |= FMT_STOP_BITS_1; |
49cdee0e KL |
496 | |
497 | frame_fmt &= ~FMT_PARITY_MASK; | |
498 | if ((cflag & PARENB) != 0) { | |
2a77c814 | 499 | if ((cflag & PARODD) != 0) |
49cdee0e | 500 | frame_fmt |= FMT_PARITY_ODD; |
2a77c814 | 501 | else |
49cdee0e | 502 | frame_fmt |= FMT_PARITY_EVEN; |
49cdee0e KL |
503 | } else { |
504 | frame_fmt |= FMT_PARITY_NONE; | |
505 | } | |
506 | ||
507 | control &= ~CONTROL_MASK; | |
508 | if ((cflag & CRTSCTS) != 0) | |
509 | control |= (CONTROL_DTR_HIGH | CONTROL_RTS_HIGH); | |
510 | ||
511 | /* change control lines if we are switching to or from B0 */ | |
512 | /* FIXME: | |
513 | spin_lock_irqsave(&priv->lock, flags); | |
514 | control = priv->line_control; | |
515 | if ((cflag & CBAUD) == B0) | |
516 | priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); | |
517 | else | |
518 | priv->line_control |= (CONTROL_DTR | CONTROL_RTS); | |
519 | if (control != priv->line_control) { | |
520 | control = priv->line_control; | |
521 | spin_unlock_irqrestore(&priv->lock, flags); | |
522 | set_control_lines(serial->dev, control); | |
523 | } else { | |
524 | spin_unlock_irqrestore(&priv->lock, flags); | |
525 | } | |
526 | */ | |
527 | ||
528 | spin_lock_irqsave(&priv->lock, flags); | |
529 | if (divisor != priv->pending_setup.divisor | |
530 | || control != priv->pending_setup.control | |
531 | || frame_fmt != priv->pending_setup.frame_fmt) { | |
532 | priv->pending_setup.divisor = divisor; | |
533 | priv->pending_setup.control = control; | |
534 | priv->pending_setup.frame_fmt = frame_fmt; | |
535 | } | |
536 | spin_unlock_irqrestore(&priv->lock, flags); | |
537 | } | |
538 | ||
a509a7e4 | 539 | static int oti6858_open(struct tty_struct *tty, struct usb_serial_port *port) |
49cdee0e KL |
540 | { |
541 | struct oti6858_private *priv = usb_get_serial_port_data(port); | |
542 | struct ktermios tmp_termios; | |
543 | struct usb_serial *serial = port->serial; | |
544 | struct oti6858_control_pkt *buf; | |
545 | unsigned long flags; | |
546 | int result; | |
547 | ||
441b62c1 | 548 | dbg("%s(port = %d)", __func__, port->number); |
49cdee0e KL |
549 | |
550 | usb_clear_halt(serial->dev, port->write_urb->pipe); | |
551 | usb_clear_halt(serial->dev, port->read_urb->pipe); | |
552 | ||
2a77c814 AC |
553 | buf = kmalloc(OTI6858_CTRL_PKT_SIZE, GFP_KERNEL); |
554 | if (buf == NULL) { | |
441b62c1 | 555 | dev_err(&port->dev, "%s(): out of memory!\n", __func__); |
49cdee0e KL |
556 | return -ENOMEM; |
557 | } | |
558 | ||
559 | result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), | |
560 | OTI6858_REQ_T_GET_STATUS, | |
561 | OTI6858_REQ_GET_STATUS, | |
562 | 0, 0, | |
563 | buf, OTI6858_CTRL_PKT_SIZE, | |
564 | 100); | |
565 | if (result != OTI6858_CTRL_PKT_SIZE) { | |
566 | /* assume default (after power-on reset) values */ | |
567 | buf->divisor = cpu_to_le16(0x009c); /* 38400 bps */ | |
568 | buf->frame_fmt = 0x03; /* 8N1 */ | |
569 | buf->something = 0x43; | |
570 | buf->control = 0x4c; /* DTR, RTS */ | |
571 | buf->tx_status = 0x00; | |
572 | buf->pin_state = 0x5b; /* RTS, CTS, DSR, DTR, RI, DCD */ | |
573 | buf->rx_bytes_avail = 0x00; | |
574 | } | |
575 | ||
576 | spin_lock_irqsave(&priv->lock, flags); | |
577 | memcpy(&priv->status, buf, OTI6858_CTRL_PKT_SIZE); | |
578 | priv->pending_setup.divisor = buf->divisor; | |
579 | priv->pending_setup.frame_fmt = buf->frame_fmt; | |
580 | priv->pending_setup.control = buf->control; | |
581 | spin_unlock_irqrestore(&priv->lock, flags); | |
582 | kfree(buf); | |
583 | ||
441b62c1 | 584 | dbg("%s(): submitting interrupt urb", __func__); |
49cdee0e KL |
585 | port->interrupt_in_urb->dev = serial->dev; |
586 | result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); | |
587 | if (result != 0) { | |
588 | dev_err(&port->dev, "%s(): usb_submit_urb() failed" | |
441b62c1 | 589 | " with error %d\n", __func__, result); |
335f8514 | 590 | oti6858_close(port); |
49cdee0e KL |
591 | return -EPROTO; |
592 | } | |
593 | ||
594 | /* setup termios */ | |
95da310e AC |
595 | if (tty) |
596 | oti6858_set_termios(tty, port, &tmp_termios); | |
335f8514 | 597 | port->port.drain_delay = 256; /* FIXME: check the FIFO length */ |
49cdee0e KL |
598 | return 0; |
599 | } | |
600 | ||
335f8514 | 601 | static void oti6858_close(struct usb_serial_port *port) |
49cdee0e KL |
602 | { |
603 | struct oti6858_private *priv = usb_get_serial_port_data(port); | |
604 | unsigned long flags; | |
49cdee0e | 605 | |
441b62c1 | 606 | dbg("%s(port = %d)", __func__, port->number); |
49cdee0e | 607 | |
28f27dcb | 608 | spin_lock_irqsave(&port->lock, flags); |
49cdee0e | 609 | /* clear out any remaining data in the buffer */ |
28f27dcb JH |
610 | kfifo_reset_out(&port->write_fifo); |
611 | spin_unlock_irqrestore(&port->lock, flags); | |
49cdee0e | 612 | |
335f8514 | 613 | dbg("%s(): after buf_clear()", __func__); |
49cdee0e KL |
614 | |
615 | /* cancel scheduled setup */ | |
616 | cancel_delayed_work(&priv->delayed_setup_work); | |
617 | cancel_delayed_work(&priv->delayed_write_work); | |
618 | flush_scheduled_work(); | |
619 | ||
620 | /* shutdown our urbs */ | |
441b62c1 | 621 | dbg("%s(): shutting down urbs", __func__); |
49cdee0e KL |
622 | usb_kill_urb(port->write_urb); |
623 | usb_kill_urb(port->read_urb); | |
624 | usb_kill_urb(port->interrupt_in_urb); | |
49cdee0e KL |
625 | } |
626 | ||
95da310e | 627 | static int oti6858_tiocmset(struct tty_struct *tty, struct file *file, |
49cdee0e KL |
628 | unsigned int set, unsigned int clear) |
629 | { | |
95da310e | 630 | struct usb_serial_port *port = tty->driver_data; |
49cdee0e KL |
631 | struct oti6858_private *priv = usb_get_serial_port_data(port); |
632 | unsigned long flags; | |
633 | u8 control; | |
634 | ||
635 | dbg("%s(port = %d, set = 0x%08x, clear = 0x%08x)", | |
441b62c1 | 636 | __func__, port->number, set, clear); |
49cdee0e KL |
637 | |
638 | if (!usb_get_intfdata(port->serial->interface)) | |
639 | return -ENODEV; | |
640 | ||
641 | /* FIXME: check if this is correct (active high/low) */ | |
642 | spin_lock_irqsave(&priv->lock, flags); | |
643 | control = priv->pending_setup.control; | |
644 | if ((set & TIOCM_RTS) != 0) | |
645 | control |= CONTROL_RTS_HIGH; | |
646 | if ((set & TIOCM_DTR) != 0) | |
647 | control |= CONTROL_DTR_HIGH; | |
648 | if ((clear & TIOCM_RTS) != 0) | |
649 | control &= ~CONTROL_RTS_HIGH; | |
650 | if ((clear & TIOCM_DTR) != 0) | |
651 | control &= ~CONTROL_DTR_HIGH; | |
652 | ||
2a77c814 | 653 | if (control != priv->pending_setup.control) |
49cdee0e | 654 | priv->pending_setup.control = control; |
49cdee0e | 655 | |
2a77c814 | 656 | spin_unlock_irqrestore(&priv->lock, flags); |
49cdee0e KL |
657 | return 0; |
658 | } | |
659 | ||
95da310e | 660 | static int oti6858_tiocmget(struct tty_struct *tty, struct file *file) |
49cdee0e | 661 | { |
95da310e | 662 | struct usb_serial_port *port = tty->driver_data; |
49cdee0e KL |
663 | struct oti6858_private *priv = usb_get_serial_port_data(port); |
664 | unsigned long flags; | |
665 | unsigned pin_state; | |
666 | unsigned result = 0; | |
667 | ||
441b62c1 | 668 | dbg("%s(port = %d)", __func__, port->number); |
49cdee0e KL |
669 | |
670 | if (!usb_get_intfdata(port->serial->interface)) | |
671 | return -ENODEV; | |
672 | ||
673 | spin_lock_irqsave(&priv->lock, flags); | |
674 | pin_state = priv->status.pin_state & PIN_MASK; | |
675 | spin_unlock_irqrestore(&priv->lock, flags); | |
676 | ||
677 | /* FIXME: check if this is correct (active high/low) */ | |
678 | if ((pin_state & PIN_RTS) != 0) | |
679 | result |= TIOCM_RTS; | |
680 | if ((pin_state & PIN_CTS) != 0) | |
681 | result |= TIOCM_CTS; | |
682 | if ((pin_state & PIN_DSR) != 0) | |
683 | result |= TIOCM_DSR; | |
684 | if ((pin_state & PIN_DTR) != 0) | |
685 | result |= TIOCM_DTR; | |
686 | if ((pin_state & PIN_RI) != 0) | |
687 | result |= TIOCM_RI; | |
688 | if ((pin_state & PIN_DCD) != 0) | |
689 | result |= TIOCM_CD; | |
690 | ||
441b62c1 | 691 | dbg("%s() = 0x%08x", __func__, result); |
49cdee0e KL |
692 | |
693 | return result; | |
694 | } | |
695 | ||
696 | static int wait_modem_info(struct usb_serial_port *port, unsigned int arg) | |
697 | { | |
698 | struct oti6858_private *priv = usb_get_serial_port_data(port); | |
699 | unsigned long flags; | |
700 | unsigned int prev, status; | |
701 | unsigned int changed; | |
702 | ||
703 | spin_lock_irqsave(&priv->lock, flags); | |
704 | prev = priv->status.pin_state; | |
705 | spin_unlock_irqrestore(&priv->lock, flags); | |
706 | ||
707 | while (1) { | |
2a77c814 AC |
708 | wait_event_interruptible(priv->intr_wait, |
709 | priv->status.pin_state != prev); | |
49cdee0e KL |
710 | if (signal_pending(current)) |
711 | return -ERESTARTSYS; | |
712 | ||
713 | spin_lock_irqsave(&priv->lock, flags); | |
714 | status = priv->status.pin_state & PIN_MASK; | |
715 | spin_unlock_irqrestore(&priv->lock, flags); | |
716 | ||
717 | changed = prev ^ status; | |
718 | /* FIXME: check if this is correct (active high/low) */ | |
2a77c814 AC |
719 | if (((arg & TIOCM_RNG) && (changed & PIN_RI)) || |
720 | ((arg & TIOCM_DSR) && (changed & PIN_DSR)) || | |
721 | ((arg & TIOCM_CD) && (changed & PIN_DCD)) || | |
722 | ((arg & TIOCM_CTS) && (changed & PIN_CTS))) | |
723 | return 0; | |
49cdee0e KL |
724 | prev = status; |
725 | } | |
726 | ||
727 | /* NOTREACHED */ | |
728 | return 0; | |
729 | } | |
730 | ||
95da310e | 731 | static int oti6858_ioctl(struct tty_struct *tty, struct file *file, |
49cdee0e KL |
732 | unsigned int cmd, unsigned long arg) |
733 | { | |
95da310e | 734 | struct usb_serial_port *port = tty->driver_data; |
49cdee0e KL |
735 | |
736 | dbg("%s(port = %d, cmd = 0x%04x, arg = 0x%08lx)", | |
441b62c1 | 737 | __func__, port->number, cmd, arg); |
49cdee0e KL |
738 | |
739 | switch (cmd) { | |
2a77c814 AC |
740 | case TIOCMIWAIT: |
741 | dbg("%s(): TIOCMIWAIT", __func__); | |
742 | return wait_modem_info(port, arg); | |
743 | default: | |
744 | dbg("%s(): 0x%04x not supported", __func__, cmd); | |
745 | break; | |
49cdee0e | 746 | } |
49cdee0e KL |
747 | return -ENOIOCTLCMD; |
748 | } | |
749 | ||
49cdee0e | 750 | |
f9c99bb8 | 751 | static void oti6858_release(struct usb_serial *serial) |
49cdee0e | 752 | { |
49cdee0e KL |
753 | int i; |
754 | ||
441b62c1 | 755 | dbg("%s()", __func__); |
49cdee0e | 756 | |
28f27dcb JH |
757 | for (i = 0; i < serial->num_ports; ++i) |
758 | kfree(usb_get_serial_port_data(serial->port[i])); | |
49cdee0e KL |
759 | } |
760 | ||
761 | static void oti6858_read_int_callback(struct urb *urb) | |
762 | { | |
cdc97792 | 763 | struct usb_serial_port *port = urb->context; |
49cdee0e KL |
764 | struct oti6858_private *priv = usb_get_serial_port_data(port); |
765 | int transient = 0, can_recv = 0, resubmit = 1; | |
78c26aeb | 766 | int status = urb->status; |
49cdee0e | 767 | |
78c26aeb | 768 | dbg("%s(port = %d, status = %d)", |
441b62c1 | 769 | __func__, port->number, status); |
49cdee0e | 770 | |
78c26aeb | 771 | switch (status) { |
49cdee0e KL |
772 | case 0: |
773 | /* success */ | |
774 | break; | |
775 | case -ECONNRESET: | |
776 | case -ENOENT: | |
777 | case -ESHUTDOWN: | |
778 | /* this urb is terminated, clean up */ | |
779 | dbg("%s(): urb shutting down with status: %d", | |
441b62c1 | 780 | __func__, status); |
49cdee0e KL |
781 | return; |
782 | default: | |
783 | dbg("%s(): nonzero urb status received: %d", | |
441b62c1 | 784 | __func__, status); |
49cdee0e KL |
785 | break; |
786 | } | |
787 | ||
78c26aeb | 788 | if (status == 0 && urb->actual_length == OTI6858_CTRL_PKT_SIZE) { |
49cdee0e KL |
789 | struct oti6858_control_pkt *xs = urb->transfer_buffer; |
790 | unsigned long flags; | |
791 | ||
792 | spin_lock_irqsave(&priv->lock, flags); | |
793 | ||
794 | if (!priv->transient) { | |
795 | if (!OTI6858_CTRL_EQUALS_PENDING(xs, priv)) { | |
796 | if (xs->rx_bytes_avail == 0) { | |
797 | priv->transient = 4; | |
798 | priv->setup_done = 0; | |
799 | resubmit = 0; | |
800 | dbg("%s(): scheduling setup_line()", | |
441b62c1 | 801 | __func__); |
49cdee0e KL |
802 | schedule_delayed_work(&priv->delayed_setup_work, 0); |
803 | } | |
804 | } | |
805 | } else { | |
806 | if (OTI6858_CTRL_EQUALS_PENDING(xs, priv)) { | |
807 | priv->transient = 0; | |
808 | } else if (!priv->setup_done) { | |
809 | resubmit = 0; | |
810 | } else if (--priv->transient == 0) { | |
811 | if (xs->rx_bytes_avail == 0) { | |
812 | priv->transient = 4; | |
813 | priv->setup_done = 0; | |
814 | resubmit = 0; | |
815 | dbg("%s(): scheduling setup_line()", | |
441b62c1 | 816 | __func__); |
49cdee0e KL |
817 | schedule_delayed_work(&priv->delayed_setup_work, 0); |
818 | } | |
819 | } | |
820 | } | |
821 | ||
822 | if (!priv->transient) { | |
823 | if (xs->pin_state != priv->status.pin_state) | |
824 | wake_up_interruptible(&priv->intr_wait); | |
825 | memcpy(&priv->status, xs, OTI6858_CTRL_PKT_SIZE); | |
826 | } | |
827 | ||
828 | if (!priv->transient && xs->rx_bytes_avail != 0) { | |
829 | can_recv = xs->rx_bytes_avail; | |
830 | priv->flags.read_urb_in_use = 1; | |
831 | } | |
832 | ||
833 | transient = priv->transient; | |
834 | spin_unlock_irqrestore(&priv->lock, flags); | |
835 | } | |
836 | ||
837 | if (can_recv) { | |
838 | int result; | |
839 | ||
840 | port->read_urb->dev = port->serial->dev; | |
841 | result = usb_submit_urb(port->read_urb, GFP_ATOMIC); | |
842 | if (result != 0) { | |
843 | priv->flags.read_urb_in_use = 0; | |
844 | dev_err(&port->dev, "%s(): usb_submit_urb() failed," | |
441b62c1 | 845 | " error %d\n", __func__, result); |
49cdee0e KL |
846 | } else { |
847 | resubmit = 0; | |
848 | } | |
849 | } else if (!transient) { | |
850 | unsigned long flags; | |
28f27dcb JH |
851 | int count; |
852 | ||
853 | spin_lock_irqsave(&port->lock, flags); | |
854 | count = kfifo_len(&port->write_fifo); | |
855 | spin_unlock_irqrestore(&port->lock, flags); | |
49cdee0e KL |
856 | |
857 | spin_lock_irqsave(&priv->lock, flags); | |
28f27dcb | 858 | if (priv->flags.write_urb_in_use == 0 && count != 0) { |
2a77c814 | 859 | schedule_delayed_work(&priv->delayed_write_work, 0); |
49cdee0e KL |
860 | resubmit = 0; |
861 | } | |
862 | spin_unlock_irqrestore(&priv->lock, flags); | |
863 | } | |
864 | ||
865 | if (resubmit) { | |
866 | int result; | |
867 | ||
2a77c814 | 868 | /* dbg("%s(): submitting interrupt urb", __func__); */ |
49cdee0e KL |
869 | urb->dev = port->serial->dev; |
870 | result = usb_submit_urb(urb, GFP_ATOMIC); | |
871 | if (result != 0) { | |
872 | dev_err(&urb->dev->dev, | |
873 | "%s(): usb_submit_urb() failed with" | |
441b62c1 | 874 | " error %d\n", __func__, result); |
49cdee0e KL |
875 | } |
876 | } | |
877 | } | |
878 | ||
879 | static void oti6858_read_bulk_callback(struct urb *urb) | |
880 | { | |
cdc97792 | 881 | struct usb_serial_port *port = urb->context; |
49cdee0e KL |
882 | struct oti6858_private *priv = usb_get_serial_port_data(port); |
883 | struct tty_struct *tty; | |
884 | unsigned char *data = urb->transfer_buffer; | |
885 | unsigned long flags; | |
78c26aeb | 886 | int status = urb->status; |
b0a239da | 887 | int result; |
49cdee0e | 888 | |
78c26aeb | 889 | dbg("%s(port = %d, status = %d)", |
441b62c1 | 890 | __func__, port->number, status); |
49cdee0e KL |
891 | |
892 | spin_lock_irqsave(&priv->lock, flags); | |
893 | priv->flags.read_urb_in_use = 0; | |
894 | spin_unlock_irqrestore(&priv->lock, flags); | |
895 | ||
78c26aeb | 896 | if (status != 0) { |
49cdee0e | 897 | /* |
78c26aeb | 898 | if (status == -EPROTO) { |
2a77c814 AC |
899 | * PL2303 mysteriously fails with -EPROTO reschedule |
900 | the read * | |
901 | dbg("%s - caught -EPROTO, resubmitting the urb", | |
902 | __func__); | |
49cdee0e KL |
903 | result = usb_submit_urb(urb, GFP_ATOMIC); |
904 | if (result) | |
441b62c1 | 905 | dev_err(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n", __func__, result); |
49cdee0e KL |
906 | return; |
907 | } | |
908 | */ | |
441b62c1 | 909 | dbg("%s(): unable to handle the error, exiting", __func__); |
49cdee0e KL |
910 | return; |
911 | } | |
912 | ||
4a90f09b | 913 | tty = tty_port_tty_get(&port->port); |
49cdee0e | 914 | if (tty != NULL && urb->actual_length > 0) { |
b0a239da | 915 | tty_insert_flip_string(tty, data, urb->actual_length); |
49cdee0e KL |
916 | tty_flip_buffer_push(tty); |
917 | } | |
4a90f09b | 918 | tty_kref_put(tty); |
49cdee0e | 919 | |
1f87158e AS |
920 | /* schedule the interrupt urb */ |
921 | port->interrupt_in_urb->dev = port->serial->dev; | |
922 | result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC); | |
923 | if (result != 0 && result != -EPERM) { | |
924 | dev_err(&port->dev, "%s(): usb_submit_urb() failed," | |
925 | " error %d\n", __func__, result); | |
49cdee0e KL |
926 | } |
927 | } | |
928 | ||
929 | static void oti6858_write_bulk_callback(struct urb *urb) | |
930 | { | |
cdc97792 | 931 | struct usb_serial_port *port = urb->context; |
49cdee0e | 932 | struct oti6858_private *priv = usb_get_serial_port_data(port); |
78c26aeb | 933 | int status = urb->status; |
49cdee0e KL |
934 | int result; |
935 | ||
78c26aeb | 936 | dbg("%s(port = %d, status = %d)", |
441b62c1 | 937 | __func__, port->number, status); |
49cdee0e | 938 | |
78c26aeb | 939 | switch (status) { |
49cdee0e KL |
940 | case 0: |
941 | /* success */ | |
942 | break; | |
943 | case -ECONNRESET: | |
944 | case -ENOENT: | |
945 | case -ESHUTDOWN: | |
946 | /* this urb is terminated, clean up */ | |
947 | dbg("%s(): urb shutting down with status: %d", | |
441b62c1 | 948 | __func__, status); |
49cdee0e KL |
949 | priv->flags.write_urb_in_use = 0; |
950 | return; | |
951 | default: | |
952 | /* error in the urb, so we have to resubmit it */ | |
953 | dbg("%s(): nonzero write bulk status received: %d", | |
441b62c1 HH |
954 | __func__, status); |
955 | dbg("%s(): overflow in write", __func__); | |
49cdee0e KL |
956 | |
957 | port->write_urb->transfer_buffer_length = 1; | |
958 | port->write_urb->dev = port->serial->dev; | |
959 | result = usb_submit_urb(port->write_urb, GFP_ATOMIC); | |
960 | if (result) { | |
961 | dev_err(&port->dev, "%s(): usb_submit_urb() failed," | |
441b62c1 | 962 | " error %d\n", __func__, result); |
49cdee0e KL |
963 | } else { |
964 | return; | |
965 | } | |
966 | } | |
967 | ||
968 | priv->flags.write_urb_in_use = 0; | |
969 | ||
2a77c814 | 970 | /* schedule the interrupt urb if we are still open */ |
49cdee0e | 971 | port->interrupt_in_urb->dev = port->serial->dev; |
441b62c1 | 972 | dbg("%s(): submitting interrupt urb", __func__); |
49cdee0e KL |
973 | result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC); |
974 | if (result != 0) { | |
975 | dev_err(&port->dev, "%s(): failed submitting int urb," | |
441b62c1 | 976 | " error %d\n", __func__, result); |
49cdee0e KL |
977 | } |
978 | } | |
979 | ||
49cdee0e KL |
980 | /* module description and (de)initialization */ |
981 | ||
982 | static int __init oti6858_init(void) | |
983 | { | |
984 | int retval; | |
985 | ||
2a77c814 AC |
986 | retval = usb_serial_register(&oti6858_device); |
987 | if (retval == 0) { | |
988 | retval = usb_register(&oti6858_driver); | |
989 | if (retval) | |
49cdee0e | 990 | usb_serial_deregister(&oti6858_device); |
49cdee0e | 991 | } |
49cdee0e KL |
992 | return retval; |
993 | } | |
994 | ||
995 | static void __exit oti6858_exit(void) | |
996 | { | |
997 | usb_deregister(&oti6858_driver); | |
998 | usb_serial_deregister(&oti6858_device); | |
999 | } | |
1000 | ||
1001 | module_init(oti6858_init); | |
1002 | module_exit(oti6858_exit); | |
1003 | ||
1004 | MODULE_DESCRIPTION(OTI6858_DESCRIPTION); | |
1005 | MODULE_AUTHOR(OTI6858_AUTHOR); | |
1006 | MODULE_VERSION(OTI6858_VERSION); | |
1007 | MODULE_LICENSE("GPL"); | |
1008 | ||
1009 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
1010 | MODULE_PARM_DESC(debug, "enable debug output"); | |
1011 |