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>" | |
49cdee0e | 60 | |
7d40d7e8 | 61 | static const struct usb_device_id id_table[] = { |
49cdee0e KL |
62 | { USB_DEVICE(OTI6858_VENDOR_ID, OTI6858_PRODUCT_ID) }, |
63 | { } | |
64 | }; | |
65 | ||
66 | MODULE_DEVICE_TABLE(usb, id_table); | |
67 | ||
49cdee0e KL |
68 | /* requests */ |
69 | #define OTI6858_REQ_GET_STATUS (USB_DIR_IN | USB_TYPE_VENDOR | 0x00) | |
70 | #define OTI6858_REQ_T_GET_STATUS 0x01 | |
71 | ||
72 | #define OTI6858_REQ_SET_LINE (USB_DIR_OUT | USB_TYPE_VENDOR | 0x00) | |
73 | #define OTI6858_REQ_T_SET_LINE 0x00 | |
74 | ||
75 | #define OTI6858_REQ_CHECK_TXBUFF (USB_DIR_IN | USB_TYPE_VENDOR | 0x01) | |
76 | #define OTI6858_REQ_T_CHECK_TXBUFF 0x00 | |
77 | ||
78 | /* format of the control packet */ | |
79 | struct oti6858_control_pkt { | |
fd05e720 | 80 | __le16 divisor; /* baud rate = 96000000 / (16 * divisor), LE */ |
49cdee0e KL |
81 | #define OTI6858_MAX_BAUD_RATE 3000000 |
82 | u8 frame_fmt; | |
83 | #define FMT_STOP_BITS_MASK 0xc0 | |
84 | #define FMT_STOP_BITS_1 0x00 | |
85 | #define FMT_STOP_BITS_2 0x40 /* 1.5 stop bits if FMT_DATA_BITS_5 */ | |
86 | #define FMT_PARITY_MASK 0x38 | |
87 | #define FMT_PARITY_NONE 0x00 | |
88 | #define FMT_PARITY_ODD 0x08 | |
89 | #define FMT_PARITY_EVEN 0x18 | |
90 | #define FMT_PARITY_MARK 0x28 | |
91 | #define FMT_PARITY_SPACE 0x38 | |
92 | #define FMT_DATA_BITS_MASK 0x03 | |
93 | #define FMT_DATA_BITS_5 0x00 | |
94 | #define FMT_DATA_BITS_6 0x01 | |
95 | #define FMT_DATA_BITS_7 0x02 | |
96 | #define FMT_DATA_BITS_8 0x03 | |
97 | u8 something; /* always equals 0x43 */ | |
98 | u8 control; /* settings of flow control lines */ | |
99 | #define CONTROL_MASK 0x0c | |
100 | #define CONTROL_DTR_HIGH 0x08 | |
101 | #define CONTROL_RTS_HIGH 0x04 | |
102 | u8 tx_status; | |
103 | #define TX_BUFFER_EMPTIED 0x09 | |
104 | u8 pin_state; | |
105 | #define PIN_MASK 0x3f | |
106 | #define PIN_RTS 0x20 /* output pin */ | |
107 | #define PIN_CTS 0x10 /* input pin, active low */ | |
108 | #define PIN_DSR 0x08 /* input pin, active low */ | |
109 | #define PIN_DTR 0x04 /* output pin */ | |
110 | #define PIN_RI 0x02 /* input pin, active low */ | |
111 | #define PIN_DCD 0x01 /* input pin, active low */ | |
112 | u8 rx_bytes_avail; /* number of bytes in rx buffer */; | |
113 | }; | |
114 | ||
115 | #define OTI6858_CTRL_PKT_SIZE sizeof(struct oti6858_control_pkt) | |
116 | #define OTI6858_CTRL_EQUALS_PENDING(a, priv) \ | |
2a77c814 | 117 | (((a)->divisor == (priv)->pending_setup.divisor) \ |
49cdee0e | 118 | && ((a)->control == (priv)->pending_setup.control) \ |
2a77c814 | 119 | && ((a)->frame_fmt == (priv)->pending_setup.frame_fmt)) |
49cdee0e KL |
120 | |
121 | /* function prototypes */ | |
a509a7e4 | 122 | static int oti6858_open(struct tty_struct *tty, struct usb_serial_port *port); |
335f8514 | 123 | static void oti6858_close(struct usb_serial_port *port); |
95da310e AC |
124 | static void oti6858_set_termios(struct tty_struct *tty, |
125 | struct usb_serial_port *port, struct ktermios *old); | |
fe1ae7fd | 126 | static void oti6858_init_termios(struct tty_struct *tty); |
49cdee0e KL |
127 | static void oti6858_read_int_callback(struct urb *urb); |
128 | static void oti6858_read_bulk_callback(struct urb *urb); | |
129 | static void oti6858_write_bulk_callback(struct urb *urb); | |
95da310e | 130 | static int oti6858_write(struct tty_struct *tty, struct usb_serial_port *port, |
49cdee0e | 131 | const unsigned char *buf, int count); |
95da310e AC |
132 | static int oti6858_write_room(struct tty_struct *tty); |
133 | static int oti6858_chars_in_buffer(struct tty_struct *tty); | |
60b33c13 | 134 | static int oti6858_tiocmget(struct tty_struct *tty); |
20b9d177 | 135 | static int oti6858_tiocmset(struct tty_struct *tty, |
49cdee0e | 136 | unsigned int set, unsigned int clear); |
1c9f9953 | 137 | static int oti6858_tiocmiwait(struct tty_struct *tty, unsigned long arg); |
289b076f JH |
138 | static int oti6858_port_probe(struct usb_serial_port *port); |
139 | static int oti6858_port_remove(struct usb_serial_port *port); | |
49cdee0e | 140 | |
49cdee0e KL |
141 | /* device info */ |
142 | static struct usb_serial_driver oti6858_device = { | |
143 | .driver = { | |
144 | .owner = THIS_MODULE, | |
145 | .name = "oti6858", | |
146 | }, | |
147 | .id_table = id_table, | |
49cdee0e KL |
148 | .num_ports = 1, |
149 | .open = oti6858_open, | |
150 | .close = oti6858_close, | |
151 | .write = oti6858_write, | |
49cdee0e | 152 | .set_termios = oti6858_set_termios, |
fe1ae7fd | 153 | .init_termios = oti6858_init_termios, |
49cdee0e KL |
154 | .tiocmget = oti6858_tiocmget, |
155 | .tiocmset = oti6858_tiocmset, | |
1c9f9953 | 156 | .tiocmiwait = oti6858_tiocmiwait, |
49cdee0e KL |
157 | .read_bulk_callback = oti6858_read_bulk_callback, |
158 | .read_int_callback = oti6858_read_int_callback, | |
159 | .write_bulk_callback = oti6858_write_bulk_callback, | |
160 | .write_room = oti6858_write_room, | |
161 | .chars_in_buffer = oti6858_chars_in_buffer, | |
289b076f JH |
162 | .port_probe = oti6858_port_probe, |
163 | .port_remove = oti6858_port_remove, | |
49cdee0e KL |
164 | }; |
165 | ||
f667ddad AS |
166 | static struct usb_serial_driver * const serial_drivers[] = { |
167 | &oti6858_device, NULL | |
168 | }; | |
169 | ||
49cdee0e KL |
170 | struct oti6858_private { |
171 | spinlock_t lock; | |
172 | ||
49cdee0e KL |
173 | struct oti6858_control_pkt status; |
174 | ||
175 | struct { | |
176 | u8 read_urb_in_use; | |
177 | u8 write_urb_in_use; | |
49cdee0e KL |
178 | } flags; |
179 | struct delayed_work delayed_write_work; | |
180 | ||
181 | struct { | |
fd05e720 | 182 | __le16 divisor; |
49cdee0e KL |
183 | u8 frame_fmt; |
184 | u8 control; | |
185 | } pending_setup; | |
186 | u8 transient; | |
187 | u8 setup_done; | |
188 | struct delayed_work delayed_setup_work; | |
189 | ||
2a77c814 | 190 | struct usb_serial_port *port; /* USB port with which associated */ |
49cdee0e KL |
191 | }; |
192 | ||
49cdee0e KL |
193 | static void setup_line(struct work_struct *work) |
194 | { | |
2a77c814 AC |
195 | struct oti6858_private *priv = container_of(work, |
196 | struct oti6858_private, delayed_setup_work.work); | |
49cdee0e KL |
197 | struct usb_serial_port *port = priv->port; |
198 | struct oti6858_control_pkt *new_setup; | |
199 | unsigned long flags; | |
200 | int result; | |
201 | ||
2a77c814 AC |
202 | new_setup = kmalloc(OTI6858_CTRL_PKT_SIZE, GFP_KERNEL); |
203 | if (new_setup == NULL) { | |
441b62c1 | 204 | dev_err(&port->dev, "%s(): out of memory!\n", __func__); |
49cdee0e | 205 | /* we will try again */ |
2a77c814 AC |
206 | schedule_delayed_work(&priv->delayed_setup_work, |
207 | msecs_to_jiffies(2)); | |
49cdee0e KL |
208 | return; |
209 | } | |
210 | ||
211 | result = usb_control_msg(port->serial->dev, | |
212 | usb_rcvctrlpipe(port->serial->dev, 0), | |
213 | OTI6858_REQ_T_GET_STATUS, | |
214 | OTI6858_REQ_GET_STATUS, | |
215 | 0, 0, | |
216 | new_setup, OTI6858_CTRL_PKT_SIZE, | |
217 | 100); | |
218 | ||
219 | if (result != OTI6858_CTRL_PKT_SIZE) { | |
441b62c1 | 220 | dev_err(&port->dev, "%s(): error reading status\n", __func__); |
49cdee0e KL |
221 | kfree(new_setup); |
222 | /* we will try again */ | |
2a77c814 AC |
223 | schedule_delayed_work(&priv->delayed_setup_work, |
224 | msecs_to_jiffies(2)); | |
49cdee0e KL |
225 | return; |
226 | } | |
227 | ||
228 | spin_lock_irqsave(&priv->lock, flags); | |
229 | if (!OTI6858_CTRL_EQUALS_PENDING(new_setup, priv)) { | |
230 | new_setup->divisor = priv->pending_setup.divisor; | |
231 | new_setup->control = priv->pending_setup.control; | |
232 | new_setup->frame_fmt = priv->pending_setup.frame_fmt; | |
233 | ||
234 | spin_unlock_irqrestore(&priv->lock, flags); | |
235 | result = usb_control_msg(port->serial->dev, | |
236 | usb_sndctrlpipe(port->serial->dev, 0), | |
237 | OTI6858_REQ_T_SET_LINE, | |
238 | OTI6858_REQ_SET_LINE, | |
239 | 0, 0, | |
240 | new_setup, OTI6858_CTRL_PKT_SIZE, | |
241 | 100); | |
242 | } else { | |
243 | spin_unlock_irqrestore(&priv->lock, flags); | |
244 | result = 0; | |
245 | } | |
246 | kfree(new_setup); | |
247 | ||
248 | spin_lock_irqsave(&priv->lock, flags); | |
249 | if (result != OTI6858_CTRL_PKT_SIZE) | |
250 | priv->transient = 0; | |
251 | priv->setup_done = 1; | |
252 | spin_unlock_irqrestore(&priv->lock, flags); | |
253 | ||
8c8e87bc | 254 | dev_dbg(&port->dev, "%s(): submitting interrupt urb\n", __func__); |
40d28582 | 255 | result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
49cdee0e | 256 | if (result != 0) { |
8c8e87bc GKH |
257 | dev_err(&port->dev, "%s(): usb_submit_urb() failed with error %d\n", |
258 | __func__, result); | |
49cdee0e KL |
259 | } |
260 | } | |
261 | ||
7d7917bc | 262 | static void send_data(struct work_struct *work) |
49cdee0e | 263 | { |
2a77c814 AC |
264 | struct oti6858_private *priv = container_of(work, |
265 | struct oti6858_private, delayed_write_work.work); | |
49cdee0e KL |
266 | struct usb_serial_port *port = priv->port; |
267 | int count = 0, result; | |
268 | unsigned long flags; | |
d2126326 | 269 | u8 *allow; |
49cdee0e | 270 | |
49cdee0e KL |
271 | spin_lock_irqsave(&priv->lock, flags); |
272 | if (priv->flags.write_urb_in_use) { | |
273 | spin_unlock_irqrestore(&priv->lock, flags); | |
2a77c814 AC |
274 | schedule_delayed_work(&priv->delayed_write_work, |
275 | msecs_to_jiffies(2)); | |
49cdee0e KL |
276 | return; |
277 | } | |
278 | priv->flags.write_urb_in_use = 1; | |
49cdee0e | 279 | spin_unlock_irqrestore(&priv->lock, flags); |
28f27dcb JH |
280 | |
281 | spin_lock_irqsave(&port->lock, flags); | |
282 | count = kfifo_len(&port->write_fifo); | |
283 | spin_unlock_irqrestore(&port->lock, flags); | |
284 | ||
49cdee0e KL |
285 | if (count > port->bulk_out_size) |
286 | count = port->bulk_out_size; | |
287 | ||
288 | if (count != 0) { | |
d2126326 JH |
289 | allow = kmalloc(1, GFP_KERNEL); |
290 | if (!allow) { | |
22a416c4 | 291 | dev_err_console(port, "%s(): kmalloc failed\n", |
d2126326 JH |
292 | __func__); |
293 | return; | |
294 | } | |
49cdee0e KL |
295 | result = usb_control_msg(port->serial->dev, |
296 | usb_rcvctrlpipe(port->serial->dev, 0), | |
297 | OTI6858_REQ_T_CHECK_TXBUFF, | |
298 | OTI6858_REQ_CHECK_TXBUFF, | |
d2126326 JH |
299 | count, 0, allow, 1, 100); |
300 | if (result != 1 || *allow != 0) | |
49cdee0e | 301 | count = 0; |
d2126326 | 302 | kfree(allow); |
49cdee0e KL |
303 | } |
304 | ||
305 | if (count == 0) { | |
306 | priv->flags.write_urb_in_use = 0; | |
307 | ||
8c8e87bc | 308 | dev_dbg(&port->dev, "%s(): submitting interrupt urb\n", __func__); |
40d28582 | 309 | result = usb_submit_urb(port->interrupt_in_urb, GFP_NOIO); |
49cdee0e | 310 | if (result != 0) { |
8c8e87bc GKH |
311 | dev_err(&port->dev, "%s(): usb_submit_urb() failed with error %d\n", |
312 | __func__, result); | |
49cdee0e KL |
313 | } |
314 | return; | |
315 | } | |
316 | ||
28f27dcb | 317 | count = kfifo_out_locked(&port->write_fifo, |
e3c1803f | 318 | port->write_urb->transfer_buffer, |
28f27dcb | 319 | count, &port->lock); |
49cdee0e | 320 | port->write_urb->transfer_buffer_length = count; |
40d28582 | 321 | result = usb_submit_urb(port->write_urb, GFP_NOIO); |
49cdee0e | 322 | if (result != 0) { |
8c8e87bc GKH |
323 | dev_err_console(port, "%s(): usb_submit_urb() failed with error %d\n", |
324 | __func__, result); | |
49cdee0e KL |
325 | priv->flags.write_urb_in_use = 0; |
326 | } | |
327 | ||
328 | usb_serial_port_softint(port); | |
329 | } | |
330 | ||
289b076f | 331 | static int oti6858_port_probe(struct usb_serial_port *port) |
49cdee0e | 332 | { |
2a77c814 | 333 | struct oti6858_private *priv; |
49cdee0e | 334 | |
289b076f JH |
335 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
336 | if (!priv) | |
337 | return -ENOMEM; | |
338 | ||
339 | spin_lock_init(&priv->lock); | |
289b076f JH |
340 | priv->port = port; |
341 | INIT_DELAYED_WORK(&priv->delayed_setup_work, setup_line); | |
342 | INIT_DELAYED_WORK(&priv->delayed_write_work, send_data); | |
343 | ||
344 | usb_set_serial_port_data(port, priv); | |
345 | ||
346 | return 0; | |
347 | } | |
348 | ||
349 | static int oti6858_port_remove(struct usb_serial_port *port) | |
350 | { | |
351 | struct oti6858_private *priv; | |
352 | ||
353 | priv = usb_get_serial_port_data(port); | |
354 | kfree(priv); | |
355 | ||
356 | return 0; | |
49cdee0e KL |
357 | } |
358 | ||
95da310e | 359 | static int oti6858_write(struct tty_struct *tty, struct usb_serial_port *port, |
49cdee0e KL |
360 | const unsigned char *buf, int count) |
361 | { | |
49cdee0e KL |
362 | if (!count) |
363 | return count; | |
364 | ||
28f27dcb | 365 | count = kfifo_in_locked(&port->write_fifo, buf, count, &port->lock); |
49cdee0e KL |
366 | |
367 | return count; | |
368 | } | |
369 | ||
95da310e | 370 | static int oti6858_write_room(struct tty_struct *tty) |
49cdee0e | 371 | { |
95da310e | 372 | struct usb_serial_port *port = tty->driver_data; |
49cdee0e KL |
373 | int room = 0; |
374 | unsigned long flags; | |
375 | ||
28f27dcb JH |
376 | spin_lock_irqsave(&port->lock, flags); |
377 | room = kfifo_avail(&port->write_fifo); | |
378 | spin_unlock_irqrestore(&port->lock, flags); | |
49cdee0e KL |
379 | |
380 | return room; | |
381 | } | |
382 | ||
95da310e | 383 | static int oti6858_chars_in_buffer(struct tty_struct *tty) |
49cdee0e | 384 | { |
95da310e | 385 | struct usb_serial_port *port = tty->driver_data; |
49cdee0e KL |
386 | int chars = 0; |
387 | unsigned long flags; | |
388 | ||
28f27dcb JH |
389 | spin_lock_irqsave(&port->lock, flags); |
390 | chars = kfifo_len(&port->write_fifo); | |
391 | spin_unlock_irqrestore(&port->lock, flags); | |
49cdee0e KL |
392 | |
393 | return chars; | |
394 | } | |
395 | ||
fe1ae7fd AC |
396 | static void oti6858_init_termios(struct tty_struct *tty) |
397 | { | |
adc8d746 AC |
398 | tty->termios = tty_std_termios; |
399 | tty->termios.c_cflag = B38400 | CS8 | CREAD | HUPCL | CLOCAL; | |
400 | tty->termios.c_ispeed = 38400; | |
401 | tty->termios.c_ospeed = 38400; | |
fe1ae7fd AC |
402 | } |
403 | ||
95da310e AC |
404 | static void oti6858_set_termios(struct tty_struct *tty, |
405 | struct usb_serial_port *port, struct ktermios *old_termios) | |
49cdee0e KL |
406 | { |
407 | struct oti6858_private *priv = usb_get_serial_port_data(port); | |
408 | unsigned long flags; | |
409 | unsigned int cflag; | |
410 | u8 frame_fmt, control; | |
fd05e720 | 411 | __le16 divisor; |
49cdee0e KL |
412 | int br; |
413 | ||
8c8e87bc | 414 | if (!tty) |
49cdee0e | 415 | return; |
49cdee0e | 416 | |
adc8d746 | 417 | cflag = tty->termios.c_cflag; |
49cdee0e KL |
418 | |
419 | spin_lock_irqsave(&priv->lock, flags); | |
420 | divisor = priv->pending_setup.divisor; | |
421 | frame_fmt = priv->pending_setup.frame_fmt; | |
422 | control = priv->pending_setup.control; | |
423 | spin_unlock_irqrestore(&priv->lock, flags); | |
424 | ||
425 | frame_fmt &= ~FMT_DATA_BITS_MASK; | |
426 | switch (cflag & CSIZE) { | |
2a77c814 AC |
427 | case CS5: |
428 | frame_fmt |= FMT_DATA_BITS_5; | |
429 | break; | |
430 | case CS6: | |
431 | frame_fmt |= FMT_DATA_BITS_6; | |
432 | break; | |
433 | case CS7: | |
434 | frame_fmt |= FMT_DATA_BITS_7; | |
435 | break; | |
436 | default: | |
437 | case CS8: | |
438 | frame_fmt |= FMT_DATA_BITS_8; | |
439 | break; | |
49cdee0e KL |
440 | } |
441 | ||
442 | /* manufacturer claims that this device can work with baud rates | |
443 | * up to 3 Mbps; I've tested it only on 115200 bps, so I can't | |
444 | * guarantee that any other baud rate will work (especially | |
445 | * the higher ones) | |
446 | */ | |
95da310e | 447 | br = tty_get_baud_rate(tty); |
49cdee0e KL |
448 | if (br == 0) { |
449 | divisor = 0; | |
b0a239da | 450 | } else { |
49cdee0e | 451 | int real_br; |
fd05e720 | 452 | int new_divisor; |
b0a239da | 453 | br = min(br, OTI6858_MAX_BAUD_RATE); |
49cdee0e | 454 | |
fd05e720 AV |
455 | new_divisor = (96000000 + 8 * br) / (16 * br); |
456 | real_br = 96000000 / (16 * new_divisor); | |
457 | divisor = cpu_to_le16(new_divisor); | |
95da310e | 458 | tty_encode_baud_rate(tty, real_br, real_br); |
49cdee0e KL |
459 | } |
460 | ||
461 | frame_fmt &= ~FMT_STOP_BITS_MASK; | |
2a77c814 | 462 | if ((cflag & CSTOPB) != 0) |
49cdee0e | 463 | frame_fmt |= FMT_STOP_BITS_2; |
2a77c814 | 464 | else |
49cdee0e | 465 | frame_fmt |= FMT_STOP_BITS_1; |
49cdee0e KL |
466 | |
467 | frame_fmt &= ~FMT_PARITY_MASK; | |
468 | if ((cflag & PARENB) != 0) { | |
2a77c814 | 469 | if ((cflag & PARODD) != 0) |
49cdee0e | 470 | frame_fmt |= FMT_PARITY_ODD; |
2a77c814 | 471 | else |
49cdee0e | 472 | frame_fmt |= FMT_PARITY_EVEN; |
49cdee0e KL |
473 | } else { |
474 | frame_fmt |= FMT_PARITY_NONE; | |
475 | } | |
476 | ||
477 | control &= ~CONTROL_MASK; | |
478 | if ((cflag & CRTSCTS) != 0) | |
479 | control |= (CONTROL_DTR_HIGH | CONTROL_RTS_HIGH); | |
480 | ||
481 | /* change control lines if we are switching to or from B0 */ | |
482 | /* FIXME: | |
483 | spin_lock_irqsave(&priv->lock, flags); | |
484 | control = priv->line_control; | |
485 | if ((cflag & CBAUD) == B0) | |
486 | priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); | |
487 | else | |
488 | priv->line_control |= (CONTROL_DTR | CONTROL_RTS); | |
489 | if (control != priv->line_control) { | |
490 | control = priv->line_control; | |
491 | spin_unlock_irqrestore(&priv->lock, flags); | |
492 | set_control_lines(serial->dev, control); | |
493 | } else { | |
494 | spin_unlock_irqrestore(&priv->lock, flags); | |
495 | } | |
496 | */ | |
497 | ||
498 | spin_lock_irqsave(&priv->lock, flags); | |
499 | if (divisor != priv->pending_setup.divisor | |
500 | || control != priv->pending_setup.control | |
501 | || frame_fmt != priv->pending_setup.frame_fmt) { | |
502 | priv->pending_setup.divisor = divisor; | |
503 | priv->pending_setup.control = control; | |
504 | priv->pending_setup.frame_fmt = frame_fmt; | |
505 | } | |
506 | spin_unlock_irqrestore(&priv->lock, flags); | |
507 | } | |
508 | ||
a509a7e4 | 509 | static int oti6858_open(struct tty_struct *tty, struct usb_serial_port *port) |
49cdee0e KL |
510 | { |
511 | struct oti6858_private *priv = usb_get_serial_port_data(port); | |
512 | struct ktermios tmp_termios; | |
513 | struct usb_serial *serial = port->serial; | |
514 | struct oti6858_control_pkt *buf; | |
515 | unsigned long flags; | |
516 | int result; | |
517 | ||
49cdee0e KL |
518 | usb_clear_halt(serial->dev, port->write_urb->pipe); |
519 | usb_clear_halt(serial->dev, port->read_urb->pipe); | |
520 | ||
2a77c814 AC |
521 | buf = kmalloc(OTI6858_CTRL_PKT_SIZE, GFP_KERNEL); |
522 | if (buf == NULL) { | |
441b62c1 | 523 | dev_err(&port->dev, "%s(): out of memory!\n", __func__); |
49cdee0e KL |
524 | return -ENOMEM; |
525 | } | |
526 | ||
527 | result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), | |
528 | OTI6858_REQ_T_GET_STATUS, | |
529 | OTI6858_REQ_GET_STATUS, | |
530 | 0, 0, | |
531 | buf, OTI6858_CTRL_PKT_SIZE, | |
532 | 100); | |
533 | if (result != OTI6858_CTRL_PKT_SIZE) { | |
534 | /* assume default (after power-on reset) values */ | |
535 | buf->divisor = cpu_to_le16(0x009c); /* 38400 bps */ | |
536 | buf->frame_fmt = 0x03; /* 8N1 */ | |
537 | buf->something = 0x43; | |
538 | buf->control = 0x4c; /* DTR, RTS */ | |
539 | buf->tx_status = 0x00; | |
540 | buf->pin_state = 0x5b; /* RTS, CTS, DSR, DTR, RI, DCD */ | |
541 | buf->rx_bytes_avail = 0x00; | |
542 | } | |
543 | ||
544 | spin_lock_irqsave(&priv->lock, flags); | |
545 | memcpy(&priv->status, buf, OTI6858_CTRL_PKT_SIZE); | |
546 | priv->pending_setup.divisor = buf->divisor; | |
547 | priv->pending_setup.frame_fmt = buf->frame_fmt; | |
548 | priv->pending_setup.control = buf->control; | |
549 | spin_unlock_irqrestore(&priv->lock, flags); | |
550 | kfree(buf); | |
551 | ||
8c8e87bc | 552 | dev_dbg(&port->dev, "%s(): submitting interrupt urb\n", __func__); |
49cdee0e KL |
553 | result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
554 | if (result != 0) { | |
8c8e87bc GKH |
555 | dev_err(&port->dev, "%s(): usb_submit_urb() failed with error %d\n", |
556 | __func__, result); | |
335f8514 | 557 | oti6858_close(port); |
d5e450ee | 558 | return result; |
49cdee0e KL |
559 | } |
560 | ||
561 | /* setup termios */ | |
95da310e AC |
562 | if (tty) |
563 | oti6858_set_termios(tty, port, &tmp_termios); | |
335f8514 | 564 | port->port.drain_delay = 256; /* FIXME: check the FIFO length */ |
49cdee0e KL |
565 | return 0; |
566 | } | |
567 | ||
335f8514 | 568 | static void oti6858_close(struct usb_serial_port *port) |
49cdee0e KL |
569 | { |
570 | struct oti6858_private *priv = usb_get_serial_port_data(port); | |
571 | unsigned long flags; | |
49cdee0e | 572 | |
28f27dcb | 573 | spin_lock_irqsave(&port->lock, flags); |
49cdee0e | 574 | /* clear out any remaining data in the buffer */ |
28f27dcb JH |
575 | kfifo_reset_out(&port->write_fifo); |
576 | spin_unlock_irqrestore(&port->lock, flags); | |
49cdee0e | 577 | |
8c8e87bc | 578 | dev_dbg(&port->dev, "%s(): after buf_clear()\n", __func__); |
49cdee0e KL |
579 | |
580 | /* cancel scheduled setup */ | |
569ff2de TH |
581 | cancel_delayed_work_sync(&priv->delayed_setup_work); |
582 | cancel_delayed_work_sync(&priv->delayed_write_work); | |
49cdee0e KL |
583 | |
584 | /* shutdown our urbs */ | |
8c8e87bc | 585 | dev_dbg(&port->dev, "%s(): shutting down urbs\n", __func__); |
49cdee0e KL |
586 | usb_kill_urb(port->write_urb); |
587 | usb_kill_urb(port->read_urb); | |
588 | usb_kill_urb(port->interrupt_in_urb); | |
49cdee0e KL |
589 | } |
590 | ||
20b9d177 | 591 | static int oti6858_tiocmset(struct tty_struct *tty, |
49cdee0e KL |
592 | unsigned int set, unsigned int clear) |
593 | { | |
95da310e | 594 | struct usb_serial_port *port = tty->driver_data; |
49cdee0e KL |
595 | struct oti6858_private *priv = usb_get_serial_port_data(port); |
596 | unsigned long flags; | |
597 | u8 control; | |
598 | ||
8c8e87bc GKH |
599 | dev_dbg(&port->dev, "%s(set = 0x%08x, clear = 0x%08x)\n", |
600 | __func__, set, clear); | |
49cdee0e | 601 | |
49cdee0e KL |
602 | /* FIXME: check if this is correct (active high/low) */ |
603 | spin_lock_irqsave(&priv->lock, flags); | |
604 | control = priv->pending_setup.control; | |
605 | if ((set & TIOCM_RTS) != 0) | |
606 | control |= CONTROL_RTS_HIGH; | |
607 | if ((set & TIOCM_DTR) != 0) | |
608 | control |= CONTROL_DTR_HIGH; | |
609 | if ((clear & TIOCM_RTS) != 0) | |
610 | control &= ~CONTROL_RTS_HIGH; | |
611 | if ((clear & TIOCM_DTR) != 0) | |
612 | control &= ~CONTROL_DTR_HIGH; | |
613 | ||
2a77c814 | 614 | if (control != priv->pending_setup.control) |
49cdee0e | 615 | priv->pending_setup.control = control; |
49cdee0e | 616 | |
2a77c814 | 617 | spin_unlock_irqrestore(&priv->lock, flags); |
49cdee0e KL |
618 | return 0; |
619 | } | |
620 | ||
60b33c13 | 621 | static int oti6858_tiocmget(struct tty_struct *tty) |
49cdee0e | 622 | { |
95da310e | 623 | struct usb_serial_port *port = tty->driver_data; |
49cdee0e KL |
624 | struct oti6858_private *priv = usb_get_serial_port_data(port); |
625 | unsigned long flags; | |
626 | unsigned pin_state; | |
627 | unsigned result = 0; | |
628 | ||
49cdee0e KL |
629 | spin_lock_irqsave(&priv->lock, flags); |
630 | pin_state = priv->status.pin_state & PIN_MASK; | |
631 | spin_unlock_irqrestore(&priv->lock, flags); | |
632 | ||
633 | /* FIXME: check if this is correct (active high/low) */ | |
634 | if ((pin_state & PIN_RTS) != 0) | |
635 | result |= TIOCM_RTS; | |
636 | if ((pin_state & PIN_CTS) != 0) | |
637 | result |= TIOCM_CTS; | |
638 | if ((pin_state & PIN_DSR) != 0) | |
639 | result |= TIOCM_DSR; | |
640 | if ((pin_state & PIN_DTR) != 0) | |
641 | result |= TIOCM_DTR; | |
642 | if ((pin_state & PIN_RI) != 0) | |
643 | result |= TIOCM_RI; | |
644 | if ((pin_state & PIN_DCD) != 0) | |
645 | result |= TIOCM_CD; | |
646 | ||
8c8e87bc | 647 | dev_dbg(&port->dev, "%s() = 0x%08x\n", __func__, result); |
49cdee0e KL |
648 | |
649 | return result; | |
650 | } | |
651 | ||
1c9f9953 | 652 | static int oti6858_tiocmiwait(struct tty_struct *tty, unsigned long arg) |
49cdee0e | 653 | { |
1c9f9953 | 654 | struct usb_serial_port *port = tty->driver_data; |
49cdee0e KL |
655 | struct oti6858_private *priv = usb_get_serial_port_data(port); |
656 | unsigned long flags; | |
657 | unsigned int prev, status; | |
658 | unsigned int changed; | |
659 | ||
660 | spin_lock_irqsave(&priv->lock, flags); | |
661 | prev = priv->status.pin_state; | |
662 | spin_unlock_irqrestore(&priv->lock, flags); | |
663 | ||
664 | while (1) { | |
215f6f04 | 665 | wait_event_interruptible(port->port.delta_msr_wait, |
8edfdab3 | 666 | port->serial->disconnected || |
2a77c814 | 667 | priv->status.pin_state != prev); |
49cdee0e KL |
668 | if (signal_pending(current)) |
669 | return -ERESTARTSYS; | |
670 | ||
8edfdab3 JH |
671 | if (port->serial->disconnected) |
672 | return -EIO; | |
673 | ||
49cdee0e KL |
674 | spin_lock_irqsave(&priv->lock, flags); |
675 | status = priv->status.pin_state & PIN_MASK; | |
676 | spin_unlock_irqrestore(&priv->lock, flags); | |
677 | ||
678 | changed = prev ^ status; | |
679 | /* FIXME: check if this is correct (active high/low) */ | |
2a77c814 AC |
680 | if (((arg & TIOCM_RNG) && (changed & PIN_RI)) || |
681 | ((arg & TIOCM_DSR) && (changed & PIN_DSR)) || | |
682 | ((arg & TIOCM_CD) && (changed & PIN_DCD)) || | |
683 | ((arg & TIOCM_CTS) && (changed & PIN_CTS))) | |
684 | return 0; | |
49cdee0e KL |
685 | prev = status; |
686 | } | |
687 | ||
688 | /* NOTREACHED */ | |
689 | return 0; | |
690 | } | |
691 | ||
49cdee0e KL |
692 | static void oti6858_read_int_callback(struct urb *urb) |
693 | { | |
cdc97792 | 694 | struct usb_serial_port *port = urb->context; |
49cdee0e KL |
695 | struct oti6858_private *priv = usb_get_serial_port_data(port); |
696 | int transient = 0, can_recv = 0, resubmit = 1; | |
78c26aeb | 697 | int status = urb->status; |
49cdee0e | 698 | |
78c26aeb | 699 | switch (status) { |
49cdee0e KL |
700 | case 0: |
701 | /* success */ | |
702 | break; | |
703 | case -ECONNRESET: | |
704 | case -ENOENT: | |
705 | case -ESHUTDOWN: | |
706 | /* this urb is terminated, clean up */ | |
8c8e87bc GKH |
707 | dev_dbg(&urb->dev->dev, "%s(): urb shutting down with status: %d\n", |
708 | __func__, status); | |
49cdee0e KL |
709 | return; |
710 | default: | |
8c8e87bc GKH |
711 | dev_dbg(&urb->dev->dev, "%s(): nonzero urb status received: %d\n", |
712 | __func__, status); | |
49cdee0e KL |
713 | break; |
714 | } | |
715 | ||
78c26aeb | 716 | if (status == 0 && urb->actual_length == OTI6858_CTRL_PKT_SIZE) { |
49cdee0e KL |
717 | struct oti6858_control_pkt *xs = urb->transfer_buffer; |
718 | unsigned long flags; | |
719 | ||
720 | spin_lock_irqsave(&priv->lock, flags); | |
721 | ||
722 | if (!priv->transient) { | |
723 | if (!OTI6858_CTRL_EQUALS_PENDING(xs, priv)) { | |
724 | if (xs->rx_bytes_avail == 0) { | |
725 | priv->transient = 4; | |
726 | priv->setup_done = 0; | |
727 | resubmit = 0; | |
8c8e87bc | 728 | dev_dbg(&port->dev, "%s(): scheduling setup_line()\n", __func__); |
49cdee0e KL |
729 | schedule_delayed_work(&priv->delayed_setup_work, 0); |
730 | } | |
731 | } | |
732 | } else { | |
733 | if (OTI6858_CTRL_EQUALS_PENDING(xs, priv)) { | |
734 | priv->transient = 0; | |
735 | } else if (!priv->setup_done) { | |
736 | resubmit = 0; | |
737 | } else if (--priv->transient == 0) { | |
738 | if (xs->rx_bytes_avail == 0) { | |
739 | priv->transient = 4; | |
740 | priv->setup_done = 0; | |
741 | resubmit = 0; | |
8c8e87bc | 742 | dev_dbg(&port->dev, "%s(): scheduling setup_line()\n", __func__); |
49cdee0e KL |
743 | schedule_delayed_work(&priv->delayed_setup_work, 0); |
744 | } | |
745 | } | |
746 | } | |
747 | ||
748 | if (!priv->transient) { | |
749 | if (xs->pin_state != priv->status.pin_state) | |
215f6f04 | 750 | wake_up_interruptible(&port->port.delta_msr_wait); |
49cdee0e KL |
751 | memcpy(&priv->status, xs, OTI6858_CTRL_PKT_SIZE); |
752 | } | |
753 | ||
754 | if (!priv->transient && xs->rx_bytes_avail != 0) { | |
755 | can_recv = xs->rx_bytes_avail; | |
756 | priv->flags.read_urb_in_use = 1; | |
757 | } | |
758 | ||
759 | transient = priv->transient; | |
760 | spin_unlock_irqrestore(&priv->lock, flags); | |
761 | } | |
762 | ||
763 | if (can_recv) { | |
764 | int result; | |
765 | ||
49cdee0e KL |
766 | result = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
767 | if (result != 0) { | |
768 | priv->flags.read_urb_in_use = 0; | |
769 | dev_err(&port->dev, "%s(): usb_submit_urb() failed," | |
441b62c1 | 770 | " error %d\n", __func__, result); |
49cdee0e KL |
771 | } else { |
772 | resubmit = 0; | |
773 | } | |
774 | } else if (!transient) { | |
775 | unsigned long flags; | |
28f27dcb JH |
776 | int count; |
777 | ||
778 | spin_lock_irqsave(&port->lock, flags); | |
779 | count = kfifo_len(&port->write_fifo); | |
780 | spin_unlock_irqrestore(&port->lock, flags); | |
49cdee0e KL |
781 | |
782 | spin_lock_irqsave(&priv->lock, flags); | |
28f27dcb | 783 | if (priv->flags.write_urb_in_use == 0 && count != 0) { |
2a77c814 | 784 | schedule_delayed_work(&priv->delayed_write_work, 0); |
49cdee0e KL |
785 | resubmit = 0; |
786 | } | |
787 | spin_unlock_irqrestore(&priv->lock, flags); | |
788 | } | |
789 | ||
790 | if (resubmit) { | |
791 | int result; | |
792 | ||
8c8e87bc | 793 | /* dev_dbg(&urb->dev->dev, "%s(): submitting interrupt urb\n", __func__); */ |
49cdee0e KL |
794 | result = usb_submit_urb(urb, GFP_ATOMIC); |
795 | if (result != 0) { | |
796 | dev_err(&urb->dev->dev, | |
797 | "%s(): usb_submit_urb() failed with" | |
441b62c1 | 798 | " error %d\n", __func__, result); |
49cdee0e KL |
799 | } |
800 | } | |
801 | } | |
802 | ||
803 | static void oti6858_read_bulk_callback(struct urb *urb) | |
804 | { | |
cdc97792 | 805 | struct usb_serial_port *port = urb->context; |
49cdee0e | 806 | struct oti6858_private *priv = usb_get_serial_port_data(port); |
49cdee0e KL |
807 | unsigned char *data = urb->transfer_buffer; |
808 | unsigned long flags; | |
78c26aeb | 809 | int status = urb->status; |
b0a239da | 810 | int result; |
49cdee0e | 811 | |
49cdee0e KL |
812 | spin_lock_irqsave(&priv->lock, flags); |
813 | priv->flags.read_urb_in_use = 0; | |
814 | spin_unlock_irqrestore(&priv->lock, flags); | |
815 | ||
78c26aeb | 816 | if (status != 0) { |
8c8e87bc | 817 | dev_dbg(&urb->dev->dev, "%s(): unable to handle the error, exiting\n", __func__); |
49cdee0e KL |
818 | return; |
819 | } | |
820 | ||
2e124b4a | 821 | if (urb->actual_length > 0) { |
05c7cd39 | 822 | tty_insert_flip_string(&port->port, data, urb->actual_length); |
2e124b4a | 823 | tty_flip_buffer_push(&port->port); |
49cdee0e KL |
824 | } |
825 | ||
1f87158e | 826 | /* schedule the interrupt urb */ |
1f87158e AS |
827 | result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC); |
828 | if (result != 0 && result != -EPERM) { | |
829 | dev_err(&port->dev, "%s(): usb_submit_urb() failed," | |
830 | " error %d\n", __func__, result); | |
49cdee0e KL |
831 | } |
832 | } | |
833 | ||
834 | static void oti6858_write_bulk_callback(struct urb *urb) | |
835 | { | |
cdc97792 | 836 | struct usb_serial_port *port = urb->context; |
49cdee0e | 837 | struct oti6858_private *priv = usb_get_serial_port_data(port); |
78c26aeb | 838 | int status = urb->status; |
49cdee0e KL |
839 | int result; |
840 | ||
78c26aeb | 841 | switch (status) { |
49cdee0e KL |
842 | case 0: |
843 | /* success */ | |
844 | break; | |
845 | case -ECONNRESET: | |
846 | case -ENOENT: | |
847 | case -ESHUTDOWN: | |
848 | /* this urb is terminated, clean up */ | |
8c8e87bc | 849 | dev_dbg(&urb->dev->dev, "%s(): urb shutting down with status: %d\n", __func__, status); |
49cdee0e KL |
850 | priv->flags.write_urb_in_use = 0; |
851 | return; | |
852 | default: | |
853 | /* error in the urb, so we have to resubmit it */ | |
8c8e87bc GKH |
854 | dev_dbg(&urb->dev->dev, "%s(): nonzero write bulk status received: %d\n", __func__, status); |
855 | dev_dbg(&urb->dev->dev, "%s(): overflow in write\n", __func__); | |
49cdee0e KL |
856 | |
857 | port->write_urb->transfer_buffer_length = 1; | |
49cdee0e KL |
858 | result = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
859 | if (result) { | |
22a416c4 | 860 | dev_err_console(port, "%s(): usb_submit_urb() failed," |
441b62c1 | 861 | " error %d\n", __func__, result); |
49cdee0e KL |
862 | } else { |
863 | return; | |
864 | } | |
865 | } | |
866 | ||
867 | priv->flags.write_urb_in_use = 0; | |
868 | ||
2a77c814 | 869 | /* schedule the interrupt urb if we are still open */ |
8c8e87bc | 870 | dev_dbg(&port->dev, "%s(): submitting interrupt urb\n", __func__); |
49cdee0e KL |
871 | result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC); |
872 | if (result != 0) { | |
873 | dev_err(&port->dev, "%s(): failed submitting int urb," | |
441b62c1 | 874 | " error %d\n", __func__, result); |
49cdee0e KL |
875 | } |
876 | } | |
877 | ||
68e24113 | 878 | module_usb_serial_driver(serial_drivers, id_table); |
49cdee0e KL |
879 | |
880 | MODULE_DESCRIPTION(OTI6858_DESCRIPTION); | |
881 | MODULE_AUTHOR(OTI6858_AUTHOR); | |
49cdee0e | 882 | MODULE_LICENSE("GPL"); |