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> | |
49cdee0e KL |
42 | #include <linux/slab.h> |
43 | #include <linux/tty.h> | |
44 | #include <linux/tty_driver.h> | |
45 | #include <linux/tty_flip.h> | |
46 | #include <linux/serial.h> | |
47 | #include <linux/module.h> | |
48 | #include <linux/moduleparam.h> | |
49 | #include <linux/spinlock.h> | |
50 | #include <linux/usb.h> | |
51 | #include <linux/usb/serial.h> | |
2a77c814 | 52 | #include <linux/uaccess.h> |
e3c1803f | 53 | #include <linux/kfifo.h> |
49cdee0e KL |
54 | #include "oti6858.h" |
55 | ||
56 | #define OTI6858_DESCRIPTION \ | |
57 | "Ours Technology Inc. OTi-6858 USB to serial adapter driver" | |
58 | #define OTI6858_AUTHOR "Tomasz Michal Lukaszewski <FIXME@FIXME>" | |
49cdee0e | 59 | |
7d40d7e8 | 60 | static const struct usb_device_id id_table[] = { |
49cdee0e KL |
61 | { USB_DEVICE(OTI6858_VENDOR_ID, OTI6858_PRODUCT_ID) }, |
62 | { } | |
63 | }; | |
64 | ||
65 | MODULE_DEVICE_TABLE(usb, id_table); | |
66 | ||
49cdee0e KL |
67 | /* requests */ |
68 | #define OTI6858_REQ_GET_STATUS (USB_DIR_IN | USB_TYPE_VENDOR | 0x00) | |
69 | #define OTI6858_REQ_T_GET_STATUS 0x01 | |
70 | ||
71 | #define OTI6858_REQ_SET_LINE (USB_DIR_OUT | USB_TYPE_VENDOR | 0x00) | |
72 | #define OTI6858_REQ_T_SET_LINE 0x00 | |
73 | ||
74 | #define OTI6858_REQ_CHECK_TXBUFF (USB_DIR_IN | USB_TYPE_VENDOR | 0x01) | |
75 | #define OTI6858_REQ_T_CHECK_TXBUFF 0x00 | |
76 | ||
77 | /* format of the control packet */ | |
78 | struct oti6858_control_pkt { | |
fd05e720 | 79 | __le16 divisor; /* baud rate = 96000000 / (16 * divisor), LE */ |
49cdee0e KL |
80 | #define OTI6858_MAX_BAUD_RATE 3000000 |
81 | u8 frame_fmt; | |
82 | #define FMT_STOP_BITS_MASK 0xc0 | |
83 | #define FMT_STOP_BITS_1 0x00 | |
84 | #define FMT_STOP_BITS_2 0x40 /* 1.5 stop bits if FMT_DATA_BITS_5 */ | |
85 | #define FMT_PARITY_MASK 0x38 | |
86 | #define FMT_PARITY_NONE 0x00 | |
87 | #define FMT_PARITY_ODD 0x08 | |
88 | #define FMT_PARITY_EVEN 0x18 | |
89 | #define FMT_PARITY_MARK 0x28 | |
90 | #define FMT_PARITY_SPACE 0x38 | |
91 | #define FMT_DATA_BITS_MASK 0x03 | |
92 | #define FMT_DATA_BITS_5 0x00 | |
93 | #define FMT_DATA_BITS_6 0x01 | |
94 | #define FMT_DATA_BITS_7 0x02 | |
95 | #define FMT_DATA_BITS_8 0x03 | |
96 | u8 something; /* always equals 0x43 */ | |
97 | u8 control; /* settings of flow control lines */ | |
98 | #define CONTROL_MASK 0x0c | |
99 | #define CONTROL_DTR_HIGH 0x08 | |
100 | #define CONTROL_RTS_HIGH 0x04 | |
101 | u8 tx_status; | |
102 | #define TX_BUFFER_EMPTIED 0x09 | |
103 | u8 pin_state; | |
104 | #define PIN_MASK 0x3f | |
1acc36e9 | 105 | #define PIN_MSR_MASK 0x1b |
49cdee0e KL |
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); |
289b076f JH |
137 | static int oti6858_port_probe(struct usb_serial_port *port); |
138 | static int oti6858_port_remove(struct usb_serial_port *port); | |
49cdee0e | 139 | |
49cdee0e KL |
140 | /* device info */ |
141 | static struct usb_serial_driver oti6858_device = { | |
142 | .driver = { | |
143 | .owner = THIS_MODULE, | |
144 | .name = "oti6858", | |
145 | }, | |
146 | .id_table = id_table, | |
49cdee0e KL |
147 | .num_ports = 1, |
148 | .open = oti6858_open, | |
149 | .close = oti6858_close, | |
150 | .write = oti6858_write, | |
49cdee0e | 151 | .set_termios = oti6858_set_termios, |
fe1ae7fd | 152 | .init_termios = oti6858_init_termios, |
49cdee0e KL |
153 | .tiocmget = oti6858_tiocmget, |
154 | .tiocmset = oti6858_tiocmset, | |
bd6383c8 | 155 | .tiocmiwait = usb_serial_generic_tiocmiwait, |
49cdee0e KL |
156 | .read_bulk_callback = oti6858_read_bulk_callback, |
157 | .read_int_callback = oti6858_read_int_callback, | |
158 | .write_bulk_callback = oti6858_write_bulk_callback, | |
159 | .write_room = oti6858_write_room, | |
160 | .chars_in_buffer = oti6858_chars_in_buffer, | |
289b076f JH |
161 | .port_probe = oti6858_port_probe, |
162 | .port_remove = oti6858_port_remove, | |
49cdee0e KL |
163 | }; |
164 | ||
f667ddad AS |
165 | static struct usb_serial_driver * const serial_drivers[] = { |
166 | &oti6858_device, NULL | |
167 | }; | |
168 | ||
49cdee0e KL |
169 | struct oti6858_private { |
170 | spinlock_t lock; | |
171 | ||
49cdee0e KL |
172 | struct oti6858_control_pkt status; |
173 | ||
174 | struct { | |
175 | u8 read_urb_in_use; | |
176 | u8 write_urb_in_use; | |
49cdee0e KL |
177 | } flags; |
178 | struct delayed_work delayed_write_work; | |
179 | ||
180 | struct { | |
fd05e720 | 181 | __le16 divisor; |
49cdee0e KL |
182 | u8 frame_fmt; |
183 | u8 control; | |
184 | } pending_setup; | |
185 | u8 transient; | |
186 | u8 setup_done; | |
187 | struct delayed_work delayed_setup_work; | |
188 | ||
2a77c814 | 189 | struct usb_serial_port *port; /* USB port with which associated */ |
49cdee0e KL |
190 | }; |
191 | ||
49cdee0e KL |
192 | static void setup_line(struct work_struct *work) |
193 | { | |
2a77c814 AC |
194 | struct oti6858_private *priv = container_of(work, |
195 | struct oti6858_private, delayed_setup_work.work); | |
49cdee0e KL |
196 | struct usb_serial_port *port = priv->port; |
197 | struct oti6858_control_pkt *new_setup; | |
198 | unsigned long flags; | |
199 | int result; | |
200 | ||
2a77c814 | 201 | new_setup = kmalloc(OTI6858_CTRL_PKT_SIZE, GFP_KERNEL); |
10c642d0 | 202 | if (!new_setup) { |
49cdee0e | 203 | /* we will try again */ |
2a77c814 AC |
204 | schedule_delayed_work(&priv->delayed_setup_work, |
205 | msecs_to_jiffies(2)); | |
49cdee0e KL |
206 | return; |
207 | } | |
208 | ||
209 | result = usb_control_msg(port->serial->dev, | |
210 | usb_rcvctrlpipe(port->serial->dev, 0), | |
211 | OTI6858_REQ_T_GET_STATUS, | |
212 | OTI6858_REQ_GET_STATUS, | |
213 | 0, 0, | |
214 | new_setup, OTI6858_CTRL_PKT_SIZE, | |
215 | 100); | |
216 | ||
217 | if (result != OTI6858_CTRL_PKT_SIZE) { | |
441b62c1 | 218 | dev_err(&port->dev, "%s(): error reading status\n", __func__); |
49cdee0e KL |
219 | kfree(new_setup); |
220 | /* we will try again */ | |
2a77c814 AC |
221 | schedule_delayed_work(&priv->delayed_setup_work, |
222 | msecs_to_jiffies(2)); | |
49cdee0e KL |
223 | return; |
224 | } | |
225 | ||
226 | spin_lock_irqsave(&priv->lock, flags); | |
227 | if (!OTI6858_CTRL_EQUALS_PENDING(new_setup, priv)) { | |
228 | new_setup->divisor = priv->pending_setup.divisor; | |
229 | new_setup->control = priv->pending_setup.control; | |
230 | new_setup->frame_fmt = priv->pending_setup.frame_fmt; | |
231 | ||
232 | spin_unlock_irqrestore(&priv->lock, flags); | |
233 | result = usb_control_msg(port->serial->dev, | |
234 | usb_sndctrlpipe(port->serial->dev, 0), | |
235 | OTI6858_REQ_T_SET_LINE, | |
236 | OTI6858_REQ_SET_LINE, | |
237 | 0, 0, | |
238 | new_setup, OTI6858_CTRL_PKT_SIZE, | |
239 | 100); | |
240 | } else { | |
241 | spin_unlock_irqrestore(&priv->lock, flags); | |
242 | result = 0; | |
243 | } | |
244 | kfree(new_setup); | |
245 | ||
246 | spin_lock_irqsave(&priv->lock, flags); | |
247 | if (result != OTI6858_CTRL_PKT_SIZE) | |
248 | priv->transient = 0; | |
249 | priv->setup_done = 1; | |
250 | spin_unlock_irqrestore(&priv->lock, flags); | |
251 | ||
8c8e87bc | 252 | dev_dbg(&port->dev, "%s(): submitting interrupt urb\n", __func__); |
40d28582 | 253 | result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
49cdee0e | 254 | if (result != 0) { |
8c8e87bc GKH |
255 | dev_err(&port->dev, "%s(): usb_submit_urb() failed with error %d\n", |
256 | __func__, result); | |
49cdee0e KL |
257 | } |
258 | } | |
259 | ||
7d7917bc | 260 | static void send_data(struct work_struct *work) |
49cdee0e | 261 | { |
2a77c814 AC |
262 | struct oti6858_private *priv = container_of(work, |
263 | struct oti6858_private, delayed_write_work.work); | |
49cdee0e KL |
264 | struct usb_serial_port *port = priv->port; |
265 | int count = 0, result; | |
266 | unsigned long flags; | |
d2126326 | 267 | u8 *allow; |
49cdee0e | 268 | |
49cdee0e KL |
269 | spin_lock_irqsave(&priv->lock, flags); |
270 | if (priv->flags.write_urb_in_use) { | |
271 | spin_unlock_irqrestore(&priv->lock, flags); | |
2a77c814 AC |
272 | schedule_delayed_work(&priv->delayed_write_work, |
273 | msecs_to_jiffies(2)); | |
49cdee0e KL |
274 | return; |
275 | } | |
276 | priv->flags.write_urb_in_use = 1; | |
49cdee0e | 277 | spin_unlock_irqrestore(&priv->lock, flags); |
28f27dcb JH |
278 | |
279 | spin_lock_irqsave(&port->lock, flags); | |
280 | count = kfifo_len(&port->write_fifo); | |
281 | spin_unlock_irqrestore(&port->lock, flags); | |
282 | ||
49cdee0e KL |
283 | if (count > port->bulk_out_size) |
284 | count = port->bulk_out_size; | |
285 | ||
286 | if (count != 0) { | |
d2126326 | 287 | allow = kmalloc(1, GFP_KERNEL); |
10c642d0 | 288 | if (!allow) |
d2126326 | 289 | return; |
10c642d0 | 290 | |
49cdee0e KL |
291 | result = usb_control_msg(port->serial->dev, |
292 | usb_rcvctrlpipe(port->serial->dev, 0), | |
293 | OTI6858_REQ_T_CHECK_TXBUFF, | |
294 | OTI6858_REQ_CHECK_TXBUFF, | |
d2126326 JH |
295 | count, 0, allow, 1, 100); |
296 | if (result != 1 || *allow != 0) | |
49cdee0e | 297 | count = 0; |
d2126326 | 298 | kfree(allow); |
49cdee0e KL |
299 | } |
300 | ||
301 | if (count == 0) { | |
302 | priv->flags.write_urb_in_use = 0; | |
303 | ||
8c8e87bc | 304 | dev_dbg(&port->dev, "%s(): submitting interrupt urb\n", __func__); |
40d28582 | 305 | result = usb_submit_urb(port->interrupt_in_urb, GFP_NOIO); |
49cdee0e | 306 | if (result != 0) { |
8c8e87bc GKH |
307 | dev_err(&port->dev, "%s(): usb_submit_urb() failed with error %d\n", |
308 | __func__, result); | |
49cdee0e KL |
309 | } |
310 | return; | |
311 | } | |
312 | ||
28f27dcb | 313 | count = kfifo_out_locked(&port->write_fifo, |
e3c1803f | 314 | port->write_urb->transfer_buffer, |
28f27dcb | 315 | count, &port->lock); |
49cdee0e | 316 | port->write_urb->transfer_buffer_length = count; |
40d28582 | 317 | result = usb_submit_urb(port->write_urb, GFP_NOIO); |
49cdee0e | 318 | if (result != 0) { |
8c8e87bc GKH |
319 | dev_err_console(port, "%s(): usb_submit_urb() failed with error %d\n", |
320 | __func__, result); | |
49cdee0e KL |
321 | priv->flags.write_urb_in_use = 0; |
322 | } | |
323 | ||
324 | usb_serial_port_softint(port); | |
325 | } | |
326 | ||
289b076f | 327 | static int oti6858_port_probe(struct usb_serial_port *port) |
49cdee0e | 328 | { |
2a77c814 | 329 | struct oti6858_private *priv; |
49cdee0e | 330 | |
289b076f JH |
331 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
332 | if (!priv) | |
333 | return -ENOMEM; | |
334 | ||
335 | spin_lock_init(&priv->lock); | |
289b076f JH |
336 | priv->port = port; |
337 | INIT_DELAYED_WORK(&priv->delayed_setup_work, setup_line); | |
338 | INIT_DELAYED_WORK(&priv->delayed_write_work, send_data); | |
339 | ||
340 | usb_set_serial_port_data(port, priv); | |
341 | ||
d7be6221 JH |
342 | port->port.drain_delay = 256; /* FIXME: check the FIFO length */ |
343 | ||
289b076f JH |
344 | return 0; |
345 | } | |
346 | ||
347 | static int oti6858_port_remove(struct usb_serial_port *port) | |
348 | { | |
349 | struct oti6858_private *priv; | |
350 | ||
351 | priv = usb_get_serial_port_data(port); | |
352 | kfree(priv); | |
353 | ||
354 | return 0; | |
49cdee0e KL |
355 | } |
356 | ||
95da310e | 357 | static int oti6858_write(struct tty_struct *tty, struct usb_serial_port *port, |
49cdee0e KL |
358 | const unsigned char *buf, int count) |
359 | { | |
49cdee0e KL |
360 | if (!count) |
361 | return count; | |
362 | ||
28f27dcb | 363 | count = kfifo_in_locked(&port->write_fifo, buf, count, &port->lock); |
49cdee0e KL |
364 | |
365 | return count; | |
366 | } | |
367 | ||
95da310e | 368 | static int oti6858_write_room(struct tty_struct *tty) |
49cdee0e | 369 | { |
95da310e | 370 | struct usb_serial_port *port = tty->driver_data; |
49cdee0e KL |
371 | int room = 0; |
372 | unsigned long flags; | |
373 | ||
28f27dcb JH |
374 | spin_lock_irqsave(&port->lock, flags); |
375 | room = kfifo_avail(&port->write_fifo); | |
376 | spin_unlock_irqrestore(&port->lock, flags); | |
49cdee0e KL |
377 | |
378 | return room; | |
379 | } | |
380 | ||
95da310e | 381 | static int oti6858_chars_in_buffer(struct tty_struct *tty) |
49cdee0e | 382 | { |
95da310e | 383 | struct usb_serial_port *port = tty->driver_data; |
49cdee0e KL |
384 | int chars = 0; |
385 | unsigned long flags; | |
386 | ||
28f27dcb JH |
387 | spin_lock_irqsave(&port->lock, flags); |
388 | chars = kfifo_len(&port->write_fifo); | |
389 | spin_unlock_irqrestore(&port->lock, flags); | |
49cdee0e KL |
390 | |
391 | return chars; | |
392 | } | |
393 | ||
fe1ae7fd AC |
394 | static void oti6858_init_termios(struct tty_struct *tty) |
395 | { | |
adc8d746 AC |
396 | tty->termios = tty_std_termios; |
397 | tty->termios.c_cflag = B38400 | CS8 | CREAD | HUPCL | CLOCAL; | |
398 | tty->termios.c_ispeed = 38400; | |
399 | tty->termios.c_ospeed = 38400; | |
fe1ae7fd AC |
400 | } |
401 | ||
95da310e AC |
402 | static void oti6858_set_termios(struct tty_struct *tty, |
403 | struct usb_serial_port *port, struct ktermios *old_termios) | |
49cdee0e KL |
404 | { |
405 | struct oti6858_private *priv = usb_get_serial_port_data(port); | |
406 | unsigned long flags; | |
407 | unsigned int cflag; | |
408 | u8 frame_fmt, control; | |
fd05e720 | 409 | __le16 divisor; |
49cdee0e KL |
410 | int br; |
411 | ||
adc8d746 | 412 | cflag = tty->termios.c_cflag; |
49cdee0e KL |
413 | |
414 | spin_lock_irqsave(&priv->lock, flags); | |
415 | divisor = priv->pending_setup.divisor; | |
416 | frame_fmt = priv->pending_setup.frame_fmt; | |
417 | control = priv->pending_setup.control; | |
418 | spin_unlock_irqrestore(&priv->lock, flags); | |
419 | ||
420 | frame_fmt &= ~FMT_DATA_BITS_MASK; | |
421 | switch (cflag & CSIZE) { | |
2a77c814 AC |
422 | case CS5: |
423 | frame_fmt |= FMT_DATA_BITS_5; | |
424 | break; | |
425 | case CS6: | |
426 | frame_fmt |= FMT_DATA_BITS_6; | |
427 | break; | |
428 | case CS7: | |
429 | frame_fmt |= FMT_DATA_BITS_7; | |
430 | break; | |
431 | default: | |
432 | case CS8: | |
433 | frame_fmt |= FMT_DATA_BITS_8; | |
434 | break; | |
49cdee0e KL |
435 | } |
436 | ||
437 | /* manufacturer claims that this device can work with baud rates | |
438 | * up to 3 Mbps; I've tested it only on 115200 bps, so I can't | |
439 | * guarantee that any other baud rate will work (especially | |
440 | * the higher ones) | |
441 | */ | |
95da310e | 442 | br = tty_get_baud_rate(tty); |
49cdee0e KL |
443 | if (br == 0) { |
444 | divisor = 0; | |
b0a239da | 445 | } else { |
49cdee0e | 446 | int real_br; |
fd05e720 | 447 | int new_divisor; |
b0a239da | 448 | br = min(br, OTI6858_MAX_BAUD_RATE); |
49cdee0e | 449 | |
fd05e720 AV |
450 | new_divisor = (96000000 + 8 * br) / (16 * br); |
451 | real_br = 96000000 / (16 * new_divisor); | |
452 | divisor = cpu_to_le16(new_divisor); | |
95da310e | 453 | tty_encode_baud_rate(tty, real_br, real_br); |
49cdee0e KL |
454 | } |
455 | ||
456 | frame_fmt &= ~FMT_STOP_BITS_MASK; | |
2a77c814 | 457 | if ((cflag & CSTOPB) != 0) |
49cdee0e | 458 | frame_fmt |= FMT_STOP_BITS_2; |
2a77c814 | 459 | else |
49cdee0e | 460 | frame_fmt |= FMT_STOP_BITS_1; |
49cdee0e KL |
461 | |
462 | frame_fmt &= ~FMT_PARITY_MASK; | |
463 | if ((cflag & PARENB) != 0) { | |
2a77c814 | 464 | if ((cflag & PARODD) != 0) |
49cdee0e | 465 | frame_fmt |= FMT_PARITY_ODD; |
2a77c814 | 466 | else |
49cdee0e | 467 | frame_fmt |= FMT_PARITY_EVEN; |
49cdee0e KL |
468 | } else { |
469 | frame_fmt |= FMT_PARITY_NONE; | |
470 | } | |
471 | ||
472 | control &= ~CONTROL_MASK; | |
473 | if ((cflag & CRTSCTS) != 0) | |
474 | control |= (CONTROL_DTR_HIGH | CONTROL_RTS_HIGH); | |
475 | ||
476 | /* change control lines if we are switching to or from B0 */ | |
477 | /* FIXME: | |
478 | spin_lock_irqsave(&priv->lock, flags); | |
479 | control = priv->line_control; | |
480 | if ((cflag & CBAUD) == B0) | |
481 | priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); | |
482 | else | |
483 | priv->line_control |= (CONTROL_DTR | CONTROL_RTS); | |
484 | if (control != priv->line_control) { | |
485 | control = priv->line_control; | |
486 | spin_unlock_irqrestore(&priv->lock, flags); | |
487 | set_control_lines(serial->dev, control); | |
488 | } else { | |
489 | spin_unlock_irqrestore(&priv->lock, flags); | |
490 | } | |
491 | */ | |
492 | ||
493 | spin_lock_irqsave(&priv->lock, flags); | |
494 | if (divisor != priv->pending_setup.divisor | |
495 | || control != priv->pending_setup.control | |
496 | || frame_fmt != priv->pending_setup.frame_fmt) { | |
497 | priv->pending_setup.divisor = divisor; | |
498 | priv->pending_setup.control = control; | |
499 | priv->pending_setup.frame_fmt = frame_fmt; | |
500 | } | |
501 | spin_unlock_irqrestore(&priv->lock, flags); | |
502 | } | |
503 | ||
a509a7e4 | 504 | static int oti6858_open(struct tty_struct *tty, struct usb_serial_port *port) |
49cdee0e KL |
505 | { |
506 | struct oti6858_private *priv = usb_get_serial_port_data(port); | |
49cdee0e KL |
507 | struct usb_serial *serial = port->serial; |
508 | struct oti6858_control_pkt *buf; | |
509 | unsigned long flags; | |
510 | int result; | |
511 | ||
49cdee0e KL |
512 | usb_clear_halt(serial->dev, port->write_urb->pipe); |
513 | usb_clear_halt(serial->dev, port->read_urb->pipe); | |
514 | ||
2a77c814 | 515 | buf = kmalloc(OTI6858_CTRL_PKT_SIZE, GFP_KERNEL); |
10c642d0 | 516 | if (!buf) |
49cdee0e | 517 | return -ENOMEM; |
49cdee0e KL |
518 | |
519 | result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), | |
520 | OTI6858_REQ_T_GET_STATUS, | |
521 | OTI6858_REQ_GET_STATUS, | |
522 | 0, 0, | |
523 | buf, OTI6858_CTRL_PKT_SIZE, | |
524 | 100); | |
525 | if (result != OTI6858_CTRL_PKT_SIZE) { | |
526 | /* assume default (after power-on reset) values */ | |
527 | buf->divisor = cpu_to_le16(0x009c); /* 38400 bps */ | |
528 | buf->frame_fmt = 0x03; /* 8N1 */ | |
529 | buf->something = 0x43; | |
530 | buf->control = 0x4c; /* DTR, RTS */ | |
531 | buf->tx_status = 0x00; | |
532 | buf->pin_state = 0x5b; /* RTS, CTS, DSR, DTR, RI, DCD */ | |
533 | buf->rx_bytes_avail = 0x00; | |
534 | } | |
535 | ||
536 | spin_lock_irqsave(&priv->lock, flags); | |
537 | memcpy(&priv->status, buf, OTI6858_CTRL_PKT_SIZE); | |
538 | priv->pending_setup.divisor = buf->divisor; | |
539 | priv->pending_setup.frame_fmt = buf->frame_fmt; | |
540 | priv->pending_setup.control = buf->control; | |
541 | spin_unlock_irqrestore(&priv->lock, flags); | |
542 | kfree(buf); | |
543 | ||
8c8e87bc | 544 | dev_dbg(&port->dev, "%s(): submitting interrupt urb\n", __func__); |
49cdee0e KL |
545 | result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
546 | if (result != 0) { | |
8c8e87bc GKH |
547 | dev_err(&port->dev, "%s(): usb_submit_urb() failed with error %d\n", |
548 | __func__, result); | |
335f8514 | 549 | oti6858_close(port); |
d5e450ee | 550 | return result; |
49cdee0e KL |
551 | } |
552 | ||
553 | /* setup termios */ | |
95da310e | 554 | if (tty) |
dc43ff92 | 555 | oti6858_set_termios(tty, port, NULL); |
d7be6221 | 556 | |
49cdee0e KL |
557 | return 0; |
558 | } | |
559 | ||
335f8514 | 560 | static void oti6858_close(struct usb_serial_port *port) |
49cdee0e KL |
561 | { |
562 | struct oti6858_private *priv = usb_get_serial_port_data(port); | |
563 | unsigned long flags; | |
49cdee0e | 564 | |
28f27dcb | 565 | spin_lock_irqsave(&port->lock, flags); |
49cdee0e | 566 | /* clear out any remaining data in the buffer */ |
28f27dcb JH |
567 | kfifo_reset_out(&port->write_fifo); |
568 | spin_unlock_irqrestore(&port->lock, flags); | |
49cdee0e | 569 | |
8c8e87bc | 570 | dev_dbg(&port->dev, "%s(): after buf_clear()\n", __func__); |
49cdee0e KL |
571 | |
572 | /* cancel scheduled setup */ | |
569ff2de TH |
573 | cancel_delayed_work_sync(&priv->delayed_setup_work); |
574 | cancel_delayed_work_sync(&priv->delayed_write_work); | |
49cdee0e KL |
575 | |
576 | /* shutdown our urbs */ | |
8c8e87bc | 577 | dev_dbg(&port->dev, "%s(): shutting down urbs\n", __func__); |
49cdee0e KL |
578 | usb_kill_urb(port->write_urb); |
579 | usb_kill_urb(port->read_urb); | |
580 | usb_kill_urb(port->interrupt_in_urb); | |
49cdee0e KL |
581 | } |
582 | ||
20b9d177 | 583 | static int oti6858_tiocmset(struct tty_struct *tty, |
49cdee0e KL |
584 | unsigned int set, unsigned int clear) |
585 | { | |
95da310e | 586 | struct usb_serial_port *port = tty->driver_data; |
49cdee0e KL |
587 | struct oti6858_private *priv = usb_get_serial_port_data(port); |
588 | unsigned long flags; | |
589 | u8 control; | |
590 | ||
8c8e87bc GKH |
591 | dev_dbg(&port->dev, "%s(set = 0x%08x, clear = 0x%08x)\n", |
592 | __func__, set, clear); | |
49cdee0e | 593 | |
49cdee0e KL |
594 | /* FIXME: check if this is correct (active high/low) */ |
595 | spin_lock_irqsave(&priv->lock, flags); | |
596 | control = priv->pending_setup.control; | |
597 | if ((set & TIOCM_RTS) != 0) | |
598 | control |= CONTROL_RTS_HIGH; | |
599 | if ((set & TIOCM_DTR) != 0) | |
600 | control |= CONTROL_DTR_HIGH; | |
601 | if ((clear & TIOCM_RTS) != 0) | |
602 | control &= ~CONTROL_RTS_HIGH; | |
603 | if ((clear & TIOCM_DTR) != 0) | |
604 | control &= ~CONTROL_DTR_HIGH; | |
605 | ||
2a77c814 | 606 | if (control != priv->pending_setup.control) |
49cdee0e | 607 | priv->pending_setup.control = control; |
49cdee0e | 608 | |
2a77c814 | 609 | spin_unlock_irqrestore(&priv->lock, flags); |
49cdee0e KL |
610 | return 0; |
611 | } | |
612 | ||
60b33c13 | 613 | static int oti6858_tiocmget(struct tty_struct *tty) |
49cdee0e | 614 | { |
95da310e | 615 | struct usb_serial_port *port = tty->driver_data; |
49cdee0e KL |
616 | struct oti6858_private *priv = usb_get_serial_port_data(port); |
617 | unsigned long flags; | |
618 | unsigned pin_state; | |
619 | unsigned result = 0; | |
620 | ||
49cdee0e KL |
621 | spin_lock_irqsave(&priv->lock, flags); |
622 | pin_state = priv->status.pin_state & PIN_MASK; | |
623 | spin_unlock_irqrestore(&priv->lock, flags); | |
624 | ||
625 | /* FIXME: check if this is correct (active high/low) */ | |
626 | if ((pin_state & PIN_RTS) != 0) | |
627 | result |= TIOCM_RTS; | |
628 | if ((pin_state & PIN_CTS) != 0) | |
629 | result |= TIOCM_CTS; | |
630 | if ((pin_state & PIN_DSR) != 0) | |
631 | result |= TIOCM_DSR; | |
632 | if ((pin_state & PIN_DTR) != 0) | |
633 | result |= TIOCM_DTR; | |
634 | if ((pin_state & PIN_RI) != 0) | |
635 | result |= TIOCM_RI; | |
636 | if ((pin_state & PIN_DCD) != 0) | |
637 | result |= TIOCM_CD; | |
638 | ||
8c8e87bc | 639 | dev_dbg(&port->dev, "%s() = 0x%08x\n", __func__, result); |
49cdee0e KL |
640 | |
641 | return result; | |
642 | } | |
643 | ||
49cdee0e KL |
644 | static void oti6858_read_int_callback(struct urb *urb) |
645 | { | |
cdc97792 | 646 | struct usb_serial_port *port = urb->context; |
49cdee0e KL |
647 | struct oti6858_private *priv = usb_get_serial_port_data(port); |
648 | int transient = 0, can_recv = 0, resubmit = 1; | |
78c26aeb | 649 | int status = urb->status; |
49cdee0e | 650 | |
78c26aeb | 651 | switch (status) { |
49cdee0e KL |
652 | case 0: |
653 | /* success */ | |
654 | break; | |
655 | case -ECONNRESET: | |
656 | case -ENOENT: | |
657 | case -ESHUTDOWN: | |
658 | /* this urb is terminated, clean up */ | |
8c8e87bc GKH |
659 | dev_dbg(&urb->dev->dev, "%s(): urb shutting down with status: %d\n", |
660 | __func__, status); | |
49cdee0e KL |
661 | return; |
662 | default: | |
8c8e87bc GKH |
663 | dev_dbg(&urb->dev->dev, "%s(): nonzero urb status received: %d\n", |
664 | __func__, status); | |
49cdee0e KL |
665 | break; |
666 | } | |
667 | ||
78c26aeb | 668 | if (status == 0 && urb->actual_length == OTI6858_CTRL_PKT_SIZE) { |
49cdee0e KL |
669 | struct oti6858_control_pkt *xs = urb->transfer_buffer; |
670 | unsigned long flags; | |
671 | ||
672 | spin_lock_irqsave(&priv->lock, flags); | |
673 | ||
674 | if (!priv->transient) { | |
675 | if (!OTI6858_CTRL_EQUALS_PENDING(xs, priv)) { | |
676 | if (xs->rx_bytes_avail == 0) { | |
677 | priv->transient = 4; | |
678 | priv->setup_done = 0; | |
679 | resubmit = 0; | |
8c8e87bc | 680 | dev_dbg(&port->dev, "%s(): scheduling setup_line()\n", __func__); |
49cdee0e KL |
681 | schedule_delayed_work(&priv->delayed_setup_work, 0); |
682 | } | |
683 | } | |
684 | } else { | |
685 | if (OTI6858_CTRL_EQUALS_PENDING(xs, priv)) { | |
686 | priv->transient = 0; | |
687 | } else if (!priv->setup_done) { | |
688 | resubmit = 0; | |
689 | } else if (--priv->transient == 0) { | |
690 | if (xs->rx_bytes_avail == 0) { | |
691 | priv->transient = 4; | |
692 | priv->setup_done = 0; | |
693 | resubmit = 0; | |
8c8e87bc | 694 | dev_dbg(&port->dev, "%s(): scheduling setup_line()\n", __func__); |
49cdee0e KL |
695 | schedule_delayed_work(&priv->delayed_setup_work, 0); |
696 | } | |
697 | } | |
698 | } | |
699 | ||
700 | if (!priv->transient) { | |
1acc36e9 JH |
701 | u8 delta = xs->pin_state ^ priv->status.pin_state; |
702 | ||
bd6383c8 JH |
703 | if (delta & PIN_MSR_MASK) { |
704 | if (delta & PIN_CTS) | |
705 | port->icount.cts++; | |
706 | if (delta & PIN_DSR) | |
707 | port->icount.dsr++; | |
708 | if (delta & PIN_RI) | |
709 | port->icount.rng++; | |
710 | if (delta & PIN_DCD) | |
711 | port->icount.dcd++; | |
712 | ||
215f6f04 | 713 | wake_up_interruptible(&port->port.delta_msr_wait); |
bd6383c8 | 714 | } |
1acc36e9 | 715 | |
49cdee0e KL |
716 | memcpy(&priv->status, xs, OTI6858_CTRL_PKT_SIZE); |
717 | } | |
718 | ||
719 | if (!priv->transient && xs->rx_bytes_avail != 0) { | |
720 | can_recv = xs->rx_bytes_avail; | |
721 | priv->flags.read_urb_in_use = 1; | |
722 | } | |
723 | ||
724 | transient = priv->transient; | |
725 | spin_unlock_irqrestore(&priv->lock, flags); | |
726 | } | |
727 | ||
728 | if (can_recv) { | |
729 | int result; | |
730 | ||
49cdee0e KL |
731 | result = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
732 | if (result != 0) { | |
733 | priv->flags.read_urb_in_use = 0; | |
734 | dev_err(&port->dev, "%s(): usb_submit_urb() failed," | |
441b62c1 | 735 | " error %d\n", __func__, result); |
49cdee0e KL |
736 | } else { |
737 | resubmit = 0; | |
738 | } | |
739 | } else if (!transient) { | |
740 | unsigned long flags; | |
28f27dcb JH |
741 | int count; |
742 | ||
743 | spin_lock_irqsave(&port->lock, flags); | |
744 | count = kfifo_len(&port->write_fifo); | |
745 | spin_unlock_irqrestore(&port->lock, flags); | |
49cdee0e KL |
746 | |
747 | spin_lock_irqsave(&priv->lock, flags); | |
28f27dcb | 748 | if (priv->flags.write_urb_in_use == 0 && count != 0) { |
2a77c814 | 749 | schedule_delayed_work(&priv->delayed_write_work, 0); |
49cdee0e KL |
750 | resubmit = 0; |
751 | } | |
752 | spin_unlock_irqrestore(&priv->lock, flags); | |
753 | } | |
754 | ||
755 | if (resubmit) { | |
756 | int result; | |
757 | ||
8c8e87bc | 758 | /* dev_dbg(&urb->dev->dev, "%s(): submitting interrupt urb\n", __func__); */ |
49cdee0e KL |
759 | result = usb_submit_urb(urb, GFP_ATOMIC); |
760 | if (result != 0) { | |
761 | dev_err(&urb->dev->dev, | |
762 | "%s(): usb_submit_urb() failed with" | |
441b62c1 | 763 | " error %d\n", __func__, result); |
49cdee0e KL |
764 | } |
765 | } | |
766 | } | |
767 | ||
768 | static void oti6858_read_bulk_callback(struct urb *urb) | |
769 | { | |
cdc97792 | 770 | struct usb_serial_port *port = urb->context; |
49cdee0e | 771 | struct oti6858_private *priv = usb_get_serial_port_data(port); |
49cdee0e KL |
772 | unsigned char *data = urb->transfer_buffer; |
773 | unsigned long flags; | |
78c26aeb | 774 | int status = urb->status; |
b0a239da | 775 | int result; |
49cdee0e | 776 | |
49cdee0e KL |
777 | spin_lock_irqsave(&priv->lock, flags); |
778 | priv->flags.read_urb_in_use = 0; | |
779 | spin_unlock_irqrestore(&priv->lock, flags); | |
780 | ||
78c26aeb | 781 | if (status != 0) { |
8c8e87bc | 782 | dev_dbg(&urb->dev->dev, "%s(): unable to handle the error, exiting\n", __func__); |
49cdee0e KL |
783 | return; |
784 | } | |
785 | ||
2e124b4a | 786 | if (urb->actual_length > 0) { |
05c7cd39 | 787 | tty_insert_flip_string(&port->port, data, urb->actual_length); |
2e124b4a | 788 | tty_flip_buffer_push(&port->port); |
49cdee0e KL |
789 | } |
790 | ||
1f87158e | 791 | /* schedule the interrupt urb */ |
1f87158e AS |
792 | result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC); |
793 | if (result != 0 && result != -EPERM) { | |
794 | dev_err(&port->dev, "%s(): usb_submit_urb() failed," | |
795 | " error %d\n", __func__, result); | |
49cdee0e KL |
796 | } |
797 | } | |
798 | ||
799 | static void oti6858_write_bulk_callback(struct urb *urb) | |
800 | { | |
cdc97792 | 801 | struct usb_serial_port *port = urb->context; |
49cdee0e | 802 | struct oti6858_private *priv = usb_get_serial_port_data(port); |
78c26aeb | 803 | int status = urb->status; |
49cdee0e KL |
804 | int result; |
805 | ||
78c26aeb | 806 | switch (status) { |
49cdee0e KL |
807 | case 0: |
808 | /* success */ | |
809 | break; | |
810 | case -ECONNRESET: | |
811 | case -ENOENT: | |
812 | case -ESHUTDOWN: | |
813 | /* this urb is terminated, clean up */ | |
8c8e87bc | 814 | dev_dbg(&urb->dev->dev, "%s(): urb shutting down with status: %d\n", __func__, status); |
49cdee0e KL |
815 | priv->flags.write_urb_in_use = 0; |
816 | return; | |
817 | default: | |
818 | /* error in the urb, so we have to resubmit it */ | |
8c8e87bc GKH |
819 | dev_dbg(&urb->dev->dev, "%s(): nonzero write bulk status received: %d\n", __func__, status); |
820 | dev_dbg(&urb->dev->dev, "%s(): overflow in write\n", __func__); | |
49cdee0e KL |
821 | |
822 | port->write_urb->transfer_buffer_length = 1; | |
49cdee0e KL |
823 | result = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
824 | if (result) { | |
22a416c4 | 825 | dev_err_console(port, "%s(): usb_submit_urb() failed," |
441b62c1 | 826 | " error %d\n", __func__, result); |
49cdee0e KL |
827 | } else { |
828 | return; | |
829 | } | |
830 | } | |
831 | ||
832 | priv->flags.write_urb_in_use = 0; | |
833 | ||
2a77c814 | 834 | /* schedule the interrupt urb if we are still open */ |
8c8e87bc | 835 | dev_dbg(&port->dev, "%s(): submitting interrupt urb\n", __func__); |
49cdee0e KL |
836 | result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC); |
837 | if (result != 0) { | |
838 | dev_err(&port->dev, "%s(): failed submitting int urb," | |
441b62c1 | 839 | " error %d\n", __func__, result); |
49cdee0e KL |
840 | } |
841 | } | |
842 | ||
68e24113 | 843 | module_usb_serial_driver(serial_drivers, id_table); |
49cdee0e KL |
844 | |
845 | MODULE_DESCRIPTION(OTI6858_DESCRIPTION); | |
846 | MODULE_AUTHOR(OTI6858_AUTHOR); | |
49cdee0e | 847 | MODULE_LICENSE("GPL"); |