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 | ||
90ab5ee9 | 69 | static bool debug; |
49cdee0e | 70 | |
49cdee0e KL |
71 | /* requests */ |
72 | #define OTI6858_REQ_GET_STATUS (USB_DIR_IN | USB_TYPE_VENDOR | 0x00) | |
73 | #define OTI6858_REQ_T_GET_STATUS 0x01 | |
74 | ||
75 | #define OTI6858_REQ_SET_LINE (USB_DIR_OUT | USB_TYPE_VENDOR | 0x00) | |
76 | #define OTI6858_REQ_T_SET_LINE 0x00 | |
77 | ||
78 | #define OTI6858_REQ_CHECK_TXBUFF (USB_DIR_IN | USB_TYPE_VENDOR | 0x01) | |
79 | #define OTI6858_REQ_T_CHECK_TXBUFF 0x00 | |
80 | ||
81 | /* format of the control packet */ | |
82 | struct oti6858_control_pkt { | |
fd05e720 | 83 | __le16 divisor; /* baud rate = 96000000 / (16 * divisor), LE */ |
49cdee0e KL |
84 | #define OTI6858_MAX_BAUD_RATE 3000000 |
85 | u8 frame_fmt; | |
86 | #define FMT_STOP_BITS_MASK 0xc0 | |
87 | #define FMT_STOP_BITS_1 0x00 | |
88 | #define FMT_STOP_BITS_2 0x40 /* 1.5 stop bits if FMT_DATA_BITS_5 */ | |
89 | #define FMT_PARITY_MASK 0x38 | |
90 | #define FMT_PARITY_NONE 0x00 | |
91 | #define FMT_PARITY_ODD 0x08 | |
92 | #define FMT_PARITY_EVEN 0x18 | |
93 | #define FMT_PARITY_MARK 0x28 | |
94 | #define FMT_PARITY_SPACE 0x38 | |
95 | #define FMT_DATA_BITS_MASK 0x03 | |
96 | #define FMT_DATA_BITS_5 0x00 | |
97 | #define FMT_DATA_BITS_6 0x01 | |
98 | #define FMT_DATA_BITS_7 0x02 | |
99 | #define FMT_DATA_BITS_8 0x03 | |
100 | u8 something; /* always equals 0x43 */ | |
101 | u8 control; /* settings of flow control lines */ | |
102 | #define CONTROL_MASK 0x0c | |
103 | #define CONTROL_DTR_HIGH 0x08 | |
104 | #define CONTROL_RTS_HIGH 0x04 | |
105 | u8 tx_status; | |
106 | #define TX_BUFFER_EMPTIED 0x09 | |
107 | u8 pin_state; | |
108 | #define PIN_MASK 0x3f | |
109 | #define PIN_RTS 0x20 /* output pin */ | |
110 | #define PIN_CTS 0x10 /* input pin, active low */ | |
111 | #define PIN_DSR 0x08 /* input pin, active low */ | |
112 | #define PIN_DTR 0x04 /* output pin */ | |
113 | #define PIN_RI 0x02 /* input pin, active low */ | |
114 | #define PIN_DCD 0x01 /* input pin, active low */ | |
115 | u8 rx_bytes_avail; /* number of bytes in rx buffer */; | |
116 | }; | |
117 | ||
118 | #define OTI6858_CTRL_PKT_SIZE sizeof(struct oti6858_control_pkt) | |
119 | #define OTI6858_CTRL_EQUALS_PENDING(a, priv) \ | |
2a77c814 | 120 | (((a)->divisor == (priv)->pending_setup.divisor) \ |
49cdee0e | 121 | && ((a)->control == (priv)->pending_setup.control) \ |
2a77c814 | 122 | && ((a)->frame_fmt == (priv)->pending_setup.frame_fmt)) |
49cdee0e KL |
123 | |
124 | /* function prototypes */ | |
a509a7e4 | 125 | static int oti6858_open(struct tty_struct *tty, struct usb_serial_port *port); |
335f8514 | 126 | static void oti6858_close(struct usb_serial_port *port); |
95da310e AC |
127 | static void oti6858_set_termios(struct tty_struct *tty, |
128 | struct usb_serial_port *port, struct ktermios *old); | |
fe1ae7fd | 129 | static void oti6858_init_termios(struct tty_struct *tty); |
00a0d0d6 | 130 | static int oti6858_ioctl(struct tty_struct *tty, |
49cdee0e KL |
131 | unsigned int cmd, unsigned long arg); |
132 | static void oti6858_read_int_callback(struct urb *urb); | |
133 | static void oti6858_read_bulk_callback(struct urb *urb); | |
134 | static void oti6858_write_bulk_callback(struct urb *urb); | |
95da310e | 135 | static int oti6858_write(struct tty_struct *tty, struct usb_serial_port *port, |
49cdee0e | 136 | const unsigned char *buf, int count); |
95da310e AC |
137 | static int oti6858_write_room(struct tty_struct *tty); |
138 | static int oti6858_chars_in_buffer(struct tty_struct *tty); | |
60b33c13 | 139 | static int oti6858_tiocmget(struct tty_struct *tty); |
20b9d177 | 140 | static int oti6858_tiocmset(struct tty_struct *tty, |
49cdee0e KL |
141 | unsigned int set, unsigned int clear); |
142 | static int oti6858_startup(struct usb_serial *serial); | |
f9c99bb8 | 143 | static void oti6858_release(struct usb_serial *serial); |
49cdee0e | 144 | |
49cdee0e KL |
145 | /* device info */ |
146 | static struct usb_serial_driver oti6858_device = { | |
147 | .driver = { | |
148 | .owner = THIS_MODULE, | |
149 | .name = "oti6858", | |
150 | }, | |
151 | .id_table = id_table, | |
49cdee0e KL |
152 | .num_ports = 1, |
153 | .open = oti6858_open, | |
154 | .close = oti6858_close, | |
155 | .write = oti6858_write, | |
156 | .ioctl = oti6858_ioctl, | |
49cdee0e | 157 | .set_termios = oti6858_set_termios, |
fe1ae7fd | 158 | .init_termios = oti6858_init_termios, |
49cdee0e KL |
159 | .tiocmget = oti6858_tiocmget, |
160 | .tiocmset = oti6858_tiocmset, | |
161 | .read_bulk_callback = oti6858_read_bulk_callback, | |
162 | .read_int_callback = oti6858_read_int_callback, | |
163 | .write_bulk_callback = oti6858_write_bulk_callback, | |
164 | .write_room = oti6858_write_room, | |
165 | .chars_in_buffer = oti6858_chars_in_buffer, | |
166 | .attach = oti6858_startup, | |
f9c99bb8 | 167 | .release = oti6858_release, |
49cdee0e KL |
168 | }; |
169 | ||
f667ddad AS |
170 | static struct usb_serial_driver * const serial_drivers[] = { |
171 | &oti6858_device, NULL | |
172 | }; | |
173 | ||
49cdee0e KL |
174 | struct oti6858_private { |
175 | spinlock_t lock; | |
176 | ||
49cdee0e KL |
177 | struct oti6858_control_pkt status; |
178 | ||
179 | struct { | |
180 | u8 read_urb_in_use; | |
181 | u8 write_urb_in_use; | |
49cdee0e KL |
182 | } flags; |
183 | struct delayed_work delayed_write_work; | |
184 | ||
185 | struct { | |
fd05e720 | 186 | __le16 divisor; |
49cdee0e KL |
187 | u8 frame_fmt; |
188 | u8 control; | |
189 | } pending_setup; | |
190 | u8 transient; | |
191 | u8 setup_done; | |
192 | struct delayed_work delayed_setup_work; | |
193 | ||
194 | wait_queue_head_t intr_wait; | |
2a77c814 | 195 | struct usb_serial_port *port; /* USB port with which associated */ |
49cdee0e KL |
196 | }; |
197 | ||
49cdee0e KL |
198 | static void setup_line(struct work_struct *work) |
199 | { | |
2a77c814 AC |
200 | struct oti6858_private *priv = container_of(work, |
201 | struct oti6858_private, delayed_setup_work.work); | |
49cdee0e KL |
202 | struct usb_serial_port *port = priv->port; |
203 | struct oti6858_control_pkt *new_setup; | |
204 | unsigned long flags; | |
205 | int result; | |
206 | ||
2a77c814 AC |
207 | new_setup = kmalloc(OTI6858_CTRL_PKT_SIZE, GFP_KERNEL); |
208 | if (new_setup == NULL) { | |
441b62c1 | 209 | dev_err(&port->dev, "%s(): out of memory!\n", __func__); |
49cdee0e | 210 | /* we will try again */ |
2a77c814 AC |
211 | schedule_delayed_work(&priv->delayed_setup_work, |
212 | msecs_to_jiffies(2)); | |
49cdee0e KL |
213 | return; |
214 | } | |
215 | ||
216 | result = usb_control_msg(port->serial->dev, | |
217 | usb_rcvctrlpipe(port->serial->dev, 0), | |
218 | OTI6858_REQ_T_GET_STATUS, | |
219 | OTI6858_REQ_GET_STATUS, | |
220 | 0, 0, | |
221 | new_setup, OTI6858_CTRL_PKT_SIZE, | |
222 | 100); | |
223 | ||
224 | if (result != OTI6858_CTRL_PKT_SIZE) { | |
441b62c1 | 225 | dev_err(&port->dev, "%s(): error reading status\n", __func__); |
49cdee0e KL |
226 | kfree(new_setup); |
227 | /* we will try again */ | |
2a77c814 AC |
228 | schedule_delayed_work(&priv->delayed_setup_work, |
229 | msecs_to_jiffies(2)); | |
49cdee0e KL |
230 | return; |
231 | } | |
232 | ||
233 | spin_lock_irqsave(&priv->lock, flags); | |
234 | if (!OTI6858_CTRL_EQUALS_PENDING(new_setup, priv)) { | |
235 | new_setup->divisor = priv->pending_setup.divisor; | |
236 | new_setup->control = priv->pending_setup.control; | |
237 | new_setup->frame_fmt = priv->pending_setup.frame_fmt; | |
238 | ||
239 | spin_unlock_irqrestore(&priv->lock, flags); | |
240 | result = usb_control_msg(port->serial->dev, | |
241 | usb_sndctrlpipe(port->serial->dev, 0), | |
242 | OTI6858_REQ_T_SET_LINE, | |
243 | OTI6858_REQ_SET_LINE, | |
244 | 0, 0, | |
245 | new_setup, OTI6858_CTRL_PKT_SIZE, | |
246 | 100); | |
247 | } else { | |
248 | spin_unlock_irqrestore(&priv->lock, flags); | |
249 | result = 0; | |
250 | } | |
251 | kfree(new_setup); | |
252 | ||
253 | spin_lock_irqsave(&priv->lock, flags); | |
254 | if (result != OTI6858_CTRL_PKT_SIZE) | |
255 | priv->transient = 0; | |
256 | priv->setup_done = 1; | |
257 | spin_unlock_irqrestore(&priv->lock, flags); | |
258 | ||
441b62c1 | 259 | dbg("%s(): submitting interrupt urb", __func__); |
40d28582 | 260 | result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
49cdee0e KL |
261 | if (result != 0) { |
262 | dev_err(&port->dev, "%s(): usb_submit_urb() failed" | |
441b62c1 | 263 | " with error %d\n", __func__, result); |
49cdee0e KL |
264 | } |
265 | } | |
266 | ||
7d7917bc | 267 | static void send_data(struct work_struct *work) |
49cdee0e | 268 | { |
2a77c814 AC |
269 | struct oti6858_private *priv = container_of(work, |
270 | struct oti6858_private, delayed_write_work.work); | |
49cdee0e KL |
271 | struct usb_serial_port *port = priv->port; |
272 | int count = 0, result; | |
273 | unsigned long flags; | |
d2126326 | 274 | u8 *allow; |
49cdee0e | 275 | |
49cdee0e KL |
276 | spin_lock_irqsave(&priv->lock, flags); |
277 | if (priv->flags.write_urb_in_use) { | |
278 | spin_unlock_irqrestore(&priv->lock, flags); | |
2a77c814 AC |
279 | schedule_delayed_work(&priv->delayed_write_work, |
280 | msecs_to_jiffies(2)); | |
49cdee0e KL |
281 | return; |
282 | } | |
283 | priv->flags.write_urb_in_use = 1; | |
49cdee0e | 284 | spin_unlock_irqrestore(&priv->lock, flags); |
28f27dcb JH |
285 | |
286 | spin_lock_irqsave(&port->lock, flags); | |
287 | count = kfifo_len(&port->write_fifo); | |
288 | spin_unlock_irqrestore(&port->lock, flags); | |
289 | ||
49cdee0e KL |
290 | if (count > port->bulk_out_size) |
291 | count = port->bulk_out_size; | |
292 | ||
293 | if (count != 0) { | |
d2126326 JH |
294 | allow = kmalloc(1, GFP_KERNEL); |
295 | if (!allow) { | |
22a416c4 | 296 | dev_err_console(port, "%s(): kmalloc failed\n", |
d2126326 JH |
297 | __func__); |
298 | return; | |
299 | } | |
49cdee0e KL |
300 | result = usb_control_msg(port->serial->dev, |
301 | usb_rcvctrlpipe(port->serial->dev, 0), | |
302 | OTI6858_REQ_T_CHECK_TXBUFF, | |
303 | OTI6858_REQ_CHECK_TXBUFF, | |
d2126326 JH |
304 | count, 0, allow, 1, 100); |
305 | if (result != 1 || *allow != 0) | |
49cdee0e | 306 | count = 0; |
d2126326 | 307 | kfree(allow); |
49cdee0e KL |
308 | } |
309 | ||
310 | if (count == 0) { | |
311 | priv->flags.write_urb_in_use = 0; | |
312 | ||
441b62c1 | 313 | dbg("%s(): submitting interrupt urb", __func__); |
40d28582 | 314 | result = usb_submit_urb(port->interrupt_in_urb, GFP_NOIO); |
49cdee0e KL |
315 | if (result != 0) { |
316 | dev_err(&port->dev, "%s(): usb_submit_urb() failed" | |
441b62c1 | 317 | " with error %d\n", __func__, result); |
49cdee0e KL |
318 | } |
319 | return; | |
320 | } | |
321 | ||
28f27dcb | 322 | count = kfifo_out_locked(&port->write_fifo, |
e3c1803f | 323 | port->write_urb->transfer_buffer, |
28f27dcb | 324 | count, &port->lock); |
49cdee0e | 325 | port->write_urb->transfer_buffer_length = count; |
40d28582 | 326 | result = usb_submit_urb(port->write_urb, GFP_NOIO); |
49cdee0e | 327 | if (result != 0) { |
22a416c4 | 328 | dev_err_console(port, "%s(): usb_submit_urb() failed" |
441b62c1 | 329 | " with error %d\n", __func__, result); |
49cdee0e KL |
330 | priv->flags.write_urb_in_use = 0; |
331 | } | |
332 | ||
333 | usb_serial_port_softint(port); | |
334 | } | |
335 | ||
336 | static int oti6858_startup(struct usb_serial *serial) | |
337 | { | |
2a77c814 AC |
338 | struct usb_serial_port *port = serial->port[0]; |
339 | struct oti6858_private *priv; | |
49cdee0e KL |
340 | int i; |
341 | ||
342 | for (i = 0; i < serial->num_ports; ++i) { | |
343 | priv = kzalloc(sizeof(struct oti6858_private), GFP_KERNEL); | |
344 | if (!priv) | |
345 | break; | |
49cdee0e KL |
346 | |
347 | spin_lock_init(&priv->lock); | |
348 | init_waitqueue_head(&priv->intr_wait); | |
2a77c814 AC |
349 | /* INIT_WORK(&priv->setup_work, setup_line, serial->port[i]); */ |
350 | /* INIT_WORK(&priv->write_work, send_data, serial->port[i]); */ | |
49cdee0e KL |
351 | priv->port = port; |
352 | INIT_DELAYED_WORK(&priv->delayed_setup_work, setup_line); | |
353 | INIT_DELAYED_WORK(&priv->delayed_write_work, send_data); | |
354 | ||
355 | usb_set_serial_port_data(serial->port[i], priv); | |
356 | } | |
357 | if (i == serial->num_ports) | |
358 | return 0; | |
359 | ||
360 | for (--i; i >= 0; --i) { | |
361 | priv = usb_get_serial_port_data(serial->port[i]); | |
49cdee0e KL |
362 | kfree(priv); |
363 | usb_set_serial_port_data(serial->port[i], NULL); | |
364 | } | |
365 | return -ENOMEM; | |
366 | } | |
367 | ||
95da310e | 368 | static int oti6858_write(struct tty_struct *tty, struct usb_serial_port *port, |
49cdee0e KL |
369 | const unsigned char *buf, int count) |
370 | { | |
49cdee0e KL |
371 | if (!count) |
372 | return count; | |
373 | ||
28f27dcb | 374 | count = kfifo_in_locked(&port->write_fifo, buf, count, &port->lock); |
49cdee0e KL |
375 | |
376 | return count; | |
377 | } | |
378 | ||
95da310e | 379 | static int oti6858_write_room(struct tty_struct *tty) |
49cdee0e | 380 | { |
95da310e | 381 | struct usb_serial_port *port = tty->driver_data; |
49cdee0e KL |
382 | int room = 0; |
383 | unsigned long flags; | |
384 | ||
28f27dcb JH |
385 | spin_lock_irqsave(&port->lock, flags); |
386 | room = kfifo_avail(&port->write_fifo); | |
387 | spin_unlock_irqrestore(&port->lock, flags); | |
49cdee0e KL |
388 | |
389 | return room; | |
390 | } | |
391 | ||
95da310e | 392 | static int oti6858_chars_in_buffer(struct tty_struct *tty) |
49cdee0e | 393 | { |
95da310e | 394 | struct usb_serial_port *port = tty->driver_data; |
49cdee0e KL |
395 | int chars = 0; |
396 | unsigned long flags; | |
397 | ||
28f27dcb JH |
398 | spin_lock_irqsave(&port->lock, flags); |
399 | chars = kfifo_len(&port->write_fifo); | |
400 | spin_unlock_irqrestore(&port->lock, flags); | |
49cdee0e KL |
401 | |
402 | return chars; | |
403 | } | |
404 | ||
fe1ae7fd AC |
405 | static void oti6858_init_termios(struct tty_struct *tty) |
406 | { | |
adc8d746 AC |
407 | tty->termios = tty_std_termios; |
408 | tty->termios.c_cflag = B38400 | CS8 | CREAD | HUPCL | CLOCAL; | |
409 | tty->termios.c_ispeed = 38400; | |
410 | tty->termios.c_ospeed = 38400; | |
fe1ae7fd AC |
411 | } |
412 | ||
95da310e AC |
413 | static void oti6858_set_termios(struct tty_struct *tty, |
414 | struct usb_serial_port *port, struct ktermios *old_termios) | |
49cdee0e KL |
415 | { |
416 | struct oti6858_private *priv = usb_get_serial_port_data(port); | |
417 | unsigned long flags; | |
418 | unsigned int cflag; | |
419 | u8 frame_fmt, control; | |
fd05e720 | 420 | __le16 divisor; |
49cdee0e KL |
421 | int br; |
422 | ||
95da310e | 423 | if (!tty) { |
441b62c1 | 424 | dbg("%s(): no tty structures", __func__); |
49cdee0e KL |
425 | return; |
426 | } | |
427 | ||
adc8d746 | 428 | cflag = tty->termios.c_cflag; |
49cdee0e KL |
429 | |
430 | spin_lock_irqsave(&priv->lock, flags); | |
431 | divisor = priv->pending_setup.divisor; | |
432 | frame_fmt = priv->pending_setup.frame_fmt; | |
433 | control = priv->pending_setup.control; | |
434 | spin_unlock_irqrestore(&priv->lock, flags); | |
435 | ||
436 | frame_fmt &= ~FMT_DATA_BITS_MASK; | |
437 | switch (cflag & CSIZE) { | |
2a77c814 AC |
438 | case CS5: |
439 | frame_fmt |= FMT_DATA_BITS_5; | |
440 | break; | |
441 | case CS6: | |
442 | frame_fmt |= FMT_DATA_BITS_6; | |
443 | break; | |
444 | case CS7: | |
445 | frame_fmt |= FMT_DATA_BITS_7; | |
446 | break; | |
447 | default: | |
448 | case CS8: | |
449 | frame_fmt |= FMT_DATA_BITS_8; | |
450 | break; | |
49cdee0e KL |
451 | } |
452 | ||
453 | /* manufacturer claims that this device can work with baud rates | |
454 | * up to 3 Mbps; I've tested it only on 115200 bps, so I can't | |
455 | * guarantee that any other baud rate will work (especially | |
456 | * the higher ones) | |
457 | */ | |
95da310e | 458 | br = tty_get_baud_rate(tty); |
49cdee0e KL |
459 | if (br == 0) { |
460 | divisor = 0; | |
b0a239da | 461 | } else { |
49cdee0e | 462 | int real_br; |
fd05e720 | 463 | int new_divisor; |
b0a239da | 464 | br = min(br, OTI6858_MAX_BAUD_RATE); |
49cdee0e | 465 | |
fd05e720 AV |
466 | new_divisor = (96000000 + 8 * br) / (16 * br); |
467 | real_br = 96000000 / (16 * new_divisor); | |
468 | divisor = cpu_to_le16(new_divisor); | |
95da310e | 469 | tty_encode_baud_rate(tty, real_br, real_br); |
49cdee0e KL |
470 | } |
471 | ||
472 | frame_fmt &= ~FMT_STOP_BITS_MASK; | |
2a77c814 | 473 | if ((cflag & CSTOPB) != 0) |
49cdee0e | 474 | frame_fmt |= FMT_STOP_BITS_2; |
2a77c814 | 475 | else |
49cdee0e | 476 | frame_fmt |= FMT_STOP_BITS_1; |
49cdee0e KL |
477 | |
478 | frame_fmt &= ~FMT_PARITY_MASK; | |
479 | if ((cflag & PARENB) != 0) { | |
2a77c814 | 480 | if ((cflag & PARODD) != 0) |
49cdee0e | 481 | frame_fmt |= FMT_PARITY_ODD; |
2a77c814 | 482 | else |
49cdee0e | 483 | frame_fmt |= FMT_PARITY_EVEN; |
49cdee0e KL |
484 | } else { |
485 | frame_fmt |= FMT_PARITY_NONE; | |
486 | } | |
487 | ||
488 | control &= ~CONTROL_MASK; | |
489 | if ((cflag & CRTSCTS) != 0) | |
490 | control |= (CONTROL_DTR_HIGH | CONTROL_RTS_HIGH); | |
491 | ||
492 | /* change control lines if we are switching to or from B0 */ | |
493 | /* FIXME: | |
494 | spin_lock_irqsave(&priv->lock, flags); | |
495 | control = priv->line_control; | |
496 | if ((cflag & CBAUD) == B0) | |
497 | priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); | |
498 | else | |
499 | priv->line_control |= (CONTROL_DTR | CONTROL_RTS); | |
500 | if (control != priv->line_control) { | |
501 | control = priv->line_control; | |
502 | spin_unlock_irqrestore(&priv->lock, flags); | |
503 | set_control_lines(serial->dev, control); | |
504 | } else { | |
505 | spin_unlock_irqrestore(&priv->lock, flags); | |
506 | } | |
507 | */ | |
508 | ||
509 | spin_lock_irqsave(&priv->lock, flags); | |
510 | if (divisor != priv->pending_setup.divisor | |
511 | || control != priv->pending_setup.control | |
512 | || frame_fmt != priv->pending_setup.frame_fmt) { | |
513 | priv->pending_setup.divisor = divisor; | |
514 | priv->pending_setup.control = control; | |
515 | priv->pending_setup.frame_fmt = frame_fmt; | |
516 | } | |
517 | spin_unlock_irqrestore(&priv->lock, flags); | |
518 | } | |
519 | ||
a509a7e4 | 520 | static int oti6858_open(struct tty_struct *tty, struct usb_serial_port *port) |
49cdee0e KL |
521 | { |
522 | struct oti6858_private *priv = usb_get_serial_port_data(port); | |
523 | struct ktermios tmp_termios; | |
524 | struct usb_serial *serial = port->serial; | |
525 | struct oti6858_control_pkt *buf; | |
526 | unsigned long flags; | |
527 | int result; | |
528 | ||
49cdee0e KL |
529 | usb_clear_halt(serial->dev, port->write_urb->pipe); |
530 | usb_clear_halt(serial->dev, port->read_urb->pipe); | |
531 | ||
2a77c814 AC |
532 | buf = kmalloc(OTI6858_CTRL_PKT_SIZE, GFP_KERNEL); |
533 | if (buf == NULL) { | |
441b62c1 | 534 | dev_err(&port->dev, "%s(): out of memory!\n", __func__); |
49cdee0e KL |
535 | return -ENOMEM; |
536 | } | |
537 | ||
538 | result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), | |
539 | OTI6858_REQ_T_GET_STATUS, | |
540 | OTI6858_REQ_GET_STATUS, | |
541 | 0, 0, | |
542 | buf, OTI6858_CTRL_PKT_SIZE, | |
543 | 100); | |
544 | if (result != OTI6858_CTRL_PKT_SIZE) { | |
545 | /* assume default (after power-on reset) values */ | |
546 | buf->divisor = cpu_to_le16(0x009c); /* 38400 bps */ | |
547 | buf->frame_fmt = 0x03; /* 8N1 */ | |
548 | buf->something = 0x43; | |
549 | buf->control = 0x4c; /* DTR, RTS */ | |
550 | buf->tx_status = 0x00; | |
551 | buf->pin_state = 0x5b; /* RTS, CTS, DSR, DTR, RI, DCD */ | |
552 | buf->rx_bytes_avail = 0x00; | |
553 | } | |
554 | ||
555 | spin_lock_irqsave(&priv->lock, flags); | |
556 | memcpy(&priv->status, buf, OTI6858_CTRL_PKT_SIZE); | |
557 | priv->pending_setup.divisor = buf->divisor; | |
558 | priv->pending_setup.frame_fmt = buf->frame_fmt; | |
559 | priv->pending_setup.control = buf->control; | |
560 | spin_unlock_irqrestore(&priv->lock, flags); | |
561 | kfree(buf); | |
562 | ||
441b62c1 | 563 | dbg("%s(): submitting interrupt urb", __func__); |
49cdee0e KL |
564 | result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
565 | if (result != 0) { | |
566 | dev_err(&port->dev, "%s(): usb_submit_urb() failed" | |
441b62c1 | 567 | " with error %d\n", __func__, result); |
335f8514 | 568 | oti6858_close(port); |
d5e450ee | 569 | return result; |
49cdee0e KL |
570 | } |
571 | ||
572 | /* setup termios */ | |
95da310e AC |
573 | if (tty) |
574 | oti6858_set_termios(tty, port, &tmp_termios); | |
335f8514 | 575 | port->port.drain_delay = 256; /* FIXME: check the FIFO length */ |
49cdee0e KL |
576 | return 0; |
577 | } | |
578 | ||
335f8514 | 579 | static void oti6858_close(struct usb_serial_port *port) |
49cdee0e KL |
580 | { |
581 | struct oti6858_private *priv = usb_get_serial_port_data(port); | |
582 | unsigned long flags; | |
49cdee0e | 583 | |
28f27dcb | 584 | spin_lock_irqsave(&port->lock, flags); |
49cdee0e | 585 | /* clear out any remaining data in the buffer */ |
28f27dcb JH |
586 | kfifo_reset_out(&port->write_fifo); |
587 | spin_unlock_irqrestore(&port->lock, flags); | |
49cdee0e | 588 | |
335f8514 | 589 | dbg("%s(): after buf_clear()", __func__); |
49cdee0e KL |
590 | |
591 | /* cancel scheduled setup */ | |
569ff2de TH |
592 | cancel_delayed_work_sync(&priv->delayed_setup_work); |
593 | cancel_delayed_work_sync(&priv->delayed_write_work); | |
49cdee0e KL |
594 | |
595 | /* shutdown our urbs */ | |
441b62c1 | 596 | dbg("%s(): shutting down urbs", __func__); |
49cdee0e KL |
597 | usb_kill_urb(port->write_urb); |
598 | usb_kill_urb(port->read_urb); | |
599 | usb_kill_urb(port->interrupt_in_urb); | |
49cdee0e KL |
600 | } |
601 | ||
20b9d177 | 602 | static int oti6858_tiocmset(struct tty_struct *tty, |
49cdee0e KL |
603 | unsigned int set, unsigned int clear) |
604 | { | |
95da310e | 605 | struct usb_serial_port *port = tty->driver_data; |
49cdee0e KL |
606 | struct oti6858_private *priv = usb_get_serial_port_data(port); |
607 | unsigned long flags; | |
608 | u8 control; | |
609 | ||
610 | dbg("%s(port = %d, set = 0x%08x, clear = 0x%08x)", | |
441b62c1 | 611 | __func__, port->number, set, clear); |
49cdee0e | 612 | |
49cdee0e KL |
613 | /* FIXME: check if this is correct (active high/low) */ |
614 | spin_lock_irqsave(&priv->lock, flags); | |
615 | control = priv->pending_setup.control; | |
616 | if ((set & TIOCM_RTS) != 0) | |
617 | control |= CONTROL_RTS_HIGH; | |
618 | if ((set & TIOCM_DTR) != 0) | |
619 | control |= CONTROL_DTR_HIGH; | |
620 | if ((clear & TIOCM_RTS) != 0) | |
621 | control &= ~CONTROL_RTS_HIGH; | |
622 | if ((clear & TIOCM_DTR) != 0) | |
623 | control &= ~CONTROL_DTR_HIGH; | |
624 | ||
2a77c814 | 625 | if (control != priv->pending_setup.control) |
49cdee0e | 626 | priv->pending_setup.control = control; |
49cdee0e | 627 | |
2a77c814 | 628 | spin_unlock_irqrestore(&priv->lock, flags); |
49cdee0e KL |
629 | return 0; |
630 | } | |
631 | ||
60b33c13 | 632 | static int oti6858_tiocmget(struct tty_struct *tty) |
49cdee0e | 633 | { |
95da310e | 634 | struct usb_serial_port *port = tty->driver_data; |
49cdee0e KL |
635 | struct oti6858_private *priv = usb_get_serial_port_data(port); |
636 | unsigned long flags; | |
637 | unsigned pin_state; | |
638 | unsigned result = 0; | |
639 | ||
49cdee0e KL |
640 | spin_lock_irqsave(&priv->lock, flags); |
641 | pin_state = priv->status.pin_state & PIN_MASK; | |
642 | spin_unlock_irqrestore(&priv->lock, flags); | |
643 | ||
644 | /* FIXME: check if this is correct (active high/low) */ | |
645 | if ((pin_state & PIN_RTS) != 0) | |
646 | result |= TIOCM_RTS; | |
647 | if ((pin_state & PIN_CTS) != 0) | |
648 | result |= TIOCM_CTS; | |
649 | if ((pin_state & PIN_DSR) != 0) | |
650 | result |= TIOCM_DSR; | |
651 | if ((pin_state & PIN_DTR) != 0) | |
652 | result |= TIOCM_DTR; | |
653 | if ((pin_state & PIN_RI) != 0) | |
654 | result |= TIOCM_RI; | |
655 | if ((pin_state & PIN_DCD) != 0) | |
656 | result |= TIOCM_CD; | |
657 | ||
441b62c1 | 658 | dbg("%s() = 0x%08x", __func__, result); |
49cdee0e KL |
659 | |
660 | return result; | |
661 | } | |
662 | ||
663 | static int wait_modem_info(struct usb_serial_port *port, unsigned int arg) | |
664 | { | |
665 | struct oti6858_private *priv = usb_get_serial_port_data(port); | |
666 | unsigned long flags; | |
667 | unsigned int prev, status; | |
668 | unsigned int changed; | |
669 | ||
670 | spin_lock_irqsave(&priv->lock, flags); | |
671 | prev = priv->status.pin_state; | |
672 | spin_unlock_irqrestore(&priv->lock, flags); | |
673 | ||
674 | while (1) { | |
2a77c814 AC |
675 | wait_event_interruptible(priv->intr_wait, |
676 | priv->status.pin_state != prev); | |
49cdee0e KL |
677 | if (signal_pending(current)) |
678 | return -ERESTARTSYS; | |
679 | ||
680 | spin_lock_irqsave(&priv->lock, flags); | |
681 | status = priv->status.pin_state & PIN_MASK; | |
682 | spin_unlock_irqrestore(&priv->lock, flags); | |
683 | ||
684 | changed = prev ^ status; | |
685 | /* FIXME: check if this is correct (active high/low) */ | |
2a77c814 AC |
686 | if (((arg & TIOCM_RNG) && (changed & PIN_RI)) || |
687 | ((arg & TIOCM_DSR) && (changed & PIN_DSR)) || | |
688 | ((arg & TIOCM_CD) && (changed & PIN_DCD)) || | |
689 | ((arg & TIOCM_CTS) && (changed & PIN_CTS))) | |
690 | return 0; | |
49cdee0e KL |
691 | prev = status; |
692 | } | |
693 | ||
694 | /* NOTREACHED */ | |
695 | return 0; | |
696 | } | |
697 | ||
00a0d0d6 | 698 | static int oti6858_ioctl(struct tty_struct *tty, |
49cdee0e KL |
699 | unsigned int cmd, unsigned long arg) |
700 | { | |
95da310e | 701 | struct usb_serial_port *port = tty->driver_data; |
49cdee0e KL |
702 | |
703 | dbg("%s(port = %d, cmd = 0x%04x, arg = 0x%08lx)", | |
441b62c1 | 704 | __func__, port->number, cmd, arg); |
49cdee0e KL |
705 | |
706 | switch (cmd) { | |
2a77c814 AC |
707 | case TIOCMIWAIT: |
708 | dbg("%s(): TIOCMIWAIT", __func__); | |
709 | return wait_modem_info(port, arg); | |
710 | default: | |
711 | dbg("%s(): 0x%04x not supported", __func__, cmd); | |
712 | break; | |
49cdee0e | 713 | } |
49cdee0e KL |
714 | return -ENOIOCTLCMD; |
715 | } | |
716 | ||
49cdee0e | 717 | |
f9c99bb8 | 718 | static void oti6858_release(struct usb_serial *serial) |
49cdee0e | 719 | { |
49cdee0e KL |
720 | int i; |
721 | ||
28f27dcb JH |
722 | for (i = 0; i < serial->num_ports; ++i) |
723 | kfree(usb_get_serial_port_data(serial->port[i])); | |
49cdee0e KL |
724 | } |
725 | ||
726 | static void oti6858_read_int_callback(struct urb *urb) | |
727 | { | |
cdc97792 | 728 | struct usb_serial_port *port = urb->context; |
49cdee0e KL |
729 | struct oti6858_private *priv = usb_get_serial_port_data(port); |
730 | int transient = 0, can_recv = 0, resubmit = 1; | |
78c26aeb | 731 | int status = urb->status; |
49cdee0e | 732 | |
78c26aeb | 733 | switch (status) { |
49cdee0e KL |
734 | case 0: |
735 | /* success */ | |
736 | break; | |
737 | case -ECONNRESET: | |
738 | case -ENOENT: | |
739 | case -ESHUTDOWN: | |
740 | /* this urb is terminated, clean up */ | |
741 | dbg("%s(): urb shutting down with status: %d", | |
441b62c1 | 742 | __func__, status); |
49cdee0e KL |
743 | return; |
744 | default: | |
745 | dbg("%s(): nonzero urb status received: %d", | |
441b62c1 | 746 | __func__, status); |
49cdee0e KL |
747 | break; |
748 | } | |
749 | ||
78c26aeb | 750 | if (status == 0 && urb->actual_length == OTI6858_CTRL_PKT_SIZE) { |
49cdee0e KL |
751 | struct oti6858_control_pkt *xs = urb->transfer_buffer; |
752 | unsigned long flags; | |
753 | ||
754 | spin_lock_irqsave(&priv->lock, flags); | |
755 | ||
756 | if (!priv->transient) { | |
757 | if (!OTI6858_CTRL_EQUALS_PENDING(xs, priv)) { | |
758 | if (xs->rx_bytes_avail == 0) { | |
759 | priv->transient = 4; | |
760 | priv->setup_done = 0; | |
761 | resubmit = 0; | |
762 | dbg("%s(): scheduling setup_line()", | |
441b62c1 | 763 | __func__); |
49cdee0e KL |
764 | schedule_delayed_work(&priv->delayed_setup_work, 0); |
765 | } | |
766 | } | |
767 | } else { | |
768 | if (OTI6858_CTRL_EQUALS_PENDING(xs, priv)) { | |
769 | priv->transient = 0; | |
770 | } else if (!priv->setup_done) { | |
771 | resubmit = 0; | |
772 | } else if (--priv->transient == 0) { | |
773 | if (xs->rx_bytes_avail == 0) { | |
774 | priv->transient = 4; | |
775 | priv->setup_done = 0; | |
776 | resubmit = 0; | |
777 | dbg("%s(): scheduling setup_line()", | |
441b62c1 | 778 | __func__); |
49cdee0e KL |
779 | schedule_delayed_work(&priv->delayed_setup_work, 0); |
780 | } | |
781 | } | |
782 | } | |
783 | ||
784 | if (!priv->transient) { | |
785 | if (xs->pin_state != priv->status.pin_state) | |
786 | wake_up_interruptible(&priv->intr_wait); | |
787 | memcpy(&priv->status, xs, OTI6858_CTRL_PKT_SIZE); | |
788 | } | |
789 | ||
790 | if (!priv->transient && xs->rx_bytes_avail != 0) { | |
791 | can_recv = xs->rx_bytes_avail; | |
792 | priv->flags.read_urb_in_use = 1; | |
793 | } | |
794 | ||
795 | transient = priv->transient; | |
796 | spin_unlock_irqrestore(&priv->lock, flags); | |
797 | } | |
798 | ||
799 | if (can_recv) { | |
800 | int result; | |
801 | ||
49cdee0e KL |
802 | result = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
803 | if (result != 0) { | |
804 | priv->flags.read_urb_in_use = 0; | |
805 | dev_err(&port->dev, "%s(): usb_submit_urb() failed," | |
441b62c1 | 806 | " error %d\n", __func__, result); |
49cdee0e KL |
807 | } else { |
808 | resubmit = 0; | |
809 | } | |
810 | } else if (!transient) { | |
811 | unsigned long flags; | |
28f27dcb JH |
812 | int count; |
813 | ||
814 | spin_lock_irqsave(&port->lock, flags); | |
815 | count = kfifo_len(&port->write_fifo); | |
816 | spin_unlock_irqrestore(&port->lock, flags); | |
49cdee0e KL |
817 | |
818 | spin_lock_irqsave(&priv->lock, flags); | |
28f27dcb | 819 | if (priv->flags.write_urb_in_use == 0 && count != 0) { |
2a77c814 | 820 | schedule_delayed_work(&priv->delayed_write_work, 0); |
49cdee0e KL |
821 | resubmit = 0; |
822 | } | |
823 | spin_unlock_irqrestore(&priv->lock, flags); | |
824 | } | |
825 | ||
826 | if (resubmit) { | |
827 | int result; | |
828 | ||
2a77c814 | 829 | /* dbg("%s(): submitting interrupt urb", __func__); */ |
49cdee0e KL |
830 | result = usb_submit_urb(urb, GFP_ATOMIC); |
831 | if (result != 0) { | |
832 | dev_err(&urb->dev->dev, | |
833 | "%s(): usb_submit_urb() failed with" | |
441b62c1 | 834 | " error %d\n", __func__, result); |
49cdee0e KL |
835 | } |
836 | } | |
837 | } | |
838 | ||
839 | static void oti6858_read_bulk_callback(struct urb *urb) | |
840 | { | |
cdc97792 | 841 | struct usb_serial_port *port = urb->context; |
49cdee0e KL |
842 | struct oti6858_private *priv = usb_get_serial_port_data(port); |
843 | struct tty_struct *tty; | |
844 | unsigned char *data = urb->transfer_buffer; | |
845 | unsigned long flags; | |
78c26aeb | 846 | int status = urb->status; |
b0a239da | 847 | int result; |
49cdee0e | 848 | |
49cdee0e KL |
849 | spin_lock_irqsave(&priv->lock, flags); |
850 | priv->flags.read_urb_in_use = 0; | |
851 | spin_unlock_irqrestore(&priv->lock, flags); | |
852 | ||
78c26aeb | 853 | if (status != 0) { |
441b62c1 | 854 | dbg("%s(): unable to handle the error, exiting", __func__); |
49cdee0e KL |
855 | return; |
856 | } | |
857 | ||
4a90f09b | 858 | tty = tty_port_tty_get(&port->port); |
49cdee0e | 859 | if (tty != NULL && urb->actual_length > 0) { |
b0a239da | 860 | tty_insert_flip_string(tty, data, urb->actual_length); |
49cdee0e KL |
861 | tty_flip_buffer_push(tty); |
862 | } | |
4a90f09b | 863 | tty_kref_put(tty); |
49cdee0e | 864 | |
1f87158e | 865 | /* schedule the interrupt urb */ |
1f87158e AS |
866 | result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC); |
867 | if (result != 0 && result != -EPERM) { | |
868 | dev_err(&port->dev, "%s(): usb_submit_urb() failed," | |
869 | " error %d\n", __func__, result); | |
49cdee0e KL |
870 | } |
871 | } | |
872 | ||
873 | static void oti6858_write_bulk_callback(struct urb *urb) | |
874 | { | |
cdc97792 | 875 | struct usb_serial_port *port = urb->context; |
49cdee0e | 876 | struct oti6858_private *priv = usb_get_serial_port_data(port); |
78c26aeb | 877 | int status = urb->status; |
49cdee0e KL |
878 | int result; |
879 | ||
78c26aeb | 880 | switch (status) { |
49cdee0e KL |
881 | case 0: |
882 | /* success */ | |
883 | break; | |
884 | case -ECONNRESET: | |
885 | case -ENOENT: | |
886 | case -ESHUTDOWN: | |
887 | /* this urb is terminated, clean up */ | |
888 | dbg("%s(): urb shutting down with status: %d", | |
441b62c1 | 889 | __func__, status); |
49cdee0e KL |
890 | priv->flags.write_urb_in_use = 0; |
891 | return; | |
892 | default: | |
893 | /* error in the urb, so we have to resubmit it */ | |
894 | dbg("%s(): nonzero write bulk status received: %d", | |
441b62c1 HH |
895 | __func__, status); |
896 | dbg("%s(): overflow in write", __func__); | |
49cdee0e KL |
897 | |
898 | port->write_urb->transfer_buffer_length = 1; | |
49cdee0e KL |
899 | result = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
900 | if (result) { | |
22a416c4 | 901 | dev_err_console(port, "%s(): usb_submit_urb() failed," |
441b62c1 | 902 | " error %d\n", __func__, result); |
49cdee0e KL |
903 | } else { |
904 | return; | |
905 | } | |
906 | } | |
907 | ||
908 | priv->flags.write_urb_in_use = 0; | |
909 | ||
2a77c814 | 910 | /* schedule the interrupt urb if we are still open */ |
441b62c1 | 911 | dbg("%s(): submitting interrupt urb", __func__); |
49cdee0e KL |
912 | result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC); |
913 | if (result != 0) { | |
914 | dev_err(&port->dev, "%s(): failed submitting int urb," | |
441b62c1 | 915 | " error %d\n", __func__, result); |
49cdee0e KL |
916 | } |
917 | } | |
918 | ||
68e24113 | 919 | module_usb_serial_driver(serial_drivers, id_table); |
49cdee0e KL |
920 | |
921 | MODULE_DESCRIPTION(OTI6858_DESCRIPTION); | |
922 | MODULE_AUTHOR(OTI6858_AUTHOR); | |
923 | MODULE_VERSION(OTI6858_VERSION); | |
924 | MODULE_LICENSE("GPL"); | |
925 | ||
926 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
927 | MODULE_PARM_DESC(debug, "enable debug output"); | |
928 |