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1da177e4 LT |
1 | /* |
2 | * Digi AccelePort USB-4 and USB-2 Serial Converters | |
3 | * | |
4 | * Copyright 2000 by Digi International | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * Shamelessly based on Brian Warner's keyspan_pda.c and Greg Kroah-Hartman's | |
12 | * usb-serial driver. | |
13 | * | |
14 | * Peter Berger (pberger@brimson.com) | |
15 | * Al Borchers (borchers@steinerpoint.com) | |
16 | * | |
17 | * (12/03/2001) gkh | |
95da310e | 18 | * switched to using port->port.count instead of private version. |
1da177e4 LT |
19 | * Removed port->active |
20 | * | |
21 | * (04/08/2001) gb | |
22 | * Identify version on module load. | |
23 | * | |
24 | * (11/01/2000) Adam J. Richter | |
25 | * usb_device_id table support | |
26 | * | |
27 | * (11/01/2000) pberger and borchers | |
28 | * -- Turned off the USB_DISABLE_SPD flag for write bulk urbs--it caused | |
29 | * USB 4 ports to hang on startup. | |
30 | * -- Serialized access to write urbs by adding the dp_write_urb_in_use | |
31 | * flag; otherwise, the driver caused SMP system hangs. Watching the | |
32 | * urb status is not sufficient. | |
33 | * | |
34 | * (10/05/2000) gkh | |
35 | * -- Fixed bug with urb->dev not being set properly, now that the usb | |
36 | * core needs it. | |
37 | * | |
38 | * (8/8/2000) pberger and borchers | |
39 | * -- Fixed close so that | |
40 | * - it can timeout while waiting for transmit idle, if needed; | |
41 | * - it ignores interrupts when flushing the port, turning | |
42 | * of modem signalling, and so on; | |
43 | * - it waits for the flush to really complete before returning. | |
44 | * -- Read_bulk_callback and write_bulk_callback check for a closed | |
45 | * port before using the tty struct or writing to the port. | |
46 | * -- The two changes above fix the oops caused by interrupted closes. | |
47 | * -- Added interruptible args to write_oob_command and set_modem_signals | |
48 | * and added a timeout arg to transmit_idle; needed for fixes to | |
49 | * close. | |
50 | * -- Added code for rx_throttle and rx_unthrottle so that input flow | |
51 | * control works. | |
52 | * -- Added code to set overrun, parity, framing, and break errors | |
53 | * (untested). | |
54 | * -- Set USB_DISABLE_SPD flag for write bulk urbs, so no 0 length | |
55 | * bulk writes are done. These hung the Digi USB device. The | |
56 | * 0 length bulk writes were a new feature of usb-uhci added in | |
57 | * the 2.4.0-test6 kernels. | |
58 | * -- Fixed mod inc race in open; do mod inc before sleeping to wait | |
59 | * for a close to finish. | |
60 | * | |
61 | * (7/31/2000) pberger | |
62 | * -- Fixed bugs with hardware handshaking: | |
63 | * - Added code to set/clear tty->hw_stopped in digi_read_oob_callback() | |
64 | * and digi_set_termios() | |
65 | * -- Added code in digi_set_termios() to | |
66 | * - add conditional in code handling transition from B0 to only | |
67 | * set RTS if RTS/CTS flow control is either not in use or if | |
68 | * the port is not currently throttled. | |
69 | * - handle turning off CRTSCTS. | |
70 | * | |
71 | * (7/30/2000) borchers | |
72 | * -- Added support for more than one Digi USB device by moving | |
73 | * globals to a private structure in the pointed to from the | |
74 | * usb_serial structure. | |
75 | * -- Moved the modem change and transmit idle wait queues into | |
76 | * the port private structure, so each port has its own queue | |
77 | * rather than sharing global queues. | |
78 | * -- Added support for break signals. | |
79 | * | |
80 | * (7/25/2000) pberger | |
81 | * -- Added USB-2 support. Note: the USB-2 supports 3 devices: two | |
82 | * serial and a parallel port. The parallel port is implemented | |
83 | * as a serial-to-parallel converter. That is, the driver actually | |
84 | * presents all three USB-2 interfaces as serial ports, but the third | |
85 | * one physically connects to a parallel device. Thus, for example, | |
86 | * one could plug a parallel printer into the USB-2's third port, | |
87 | * but from the kernel's (and userland's) point of view what's | |
88 | * actually out there is a serial device. | |
89 | * | |
90 | * (7/15/2000) borchers | |
91 | * -- Fixed race in open when a close is in progress. | |
92 | * -- Keep count of opens and dec the module use count for each | |
93 | * outstanding open when shutdown is called (on disconnect). | |
94 | * -- Fixed sanity checks in read_bulk_callback and write_bulk_callback | |
95 | * so pointers are checked before use. | |
96 | * -- Split read bulk callback into in band and out of band | |
97 | * callbacks, and no longer restart read chains if there is | |
98 | * a status error or a sanity error. This fixed the seg | |
99 | * faults and other errors we used to get on disconnect. | |
100 | * -- Port->active is once again a flag as usb-serial intended it | |
101 | * to be, not a count. Since it was only a char it would | |
102 | * have been limited to 256 simultaneous opens. Now the open | |
103 | * count is kept in the port private structure in dp_open_count. | |
104 | * -- Added code for modularization of the digi_acceleport driver. | |
105 | * | |
106 | * (6/27/2000) pberger and borchers | |
107 | * -- Zeroed out sync field in the wakeup_task before first use; | |
108 | * otherwise the uninitialized value might prevent the task from | |
109 | * being scheduled. | |
110 | * -- Initialized ret value to 0 in write_bulk_callback, otherwise | |
111 | * the uninitialized value could cause a spurious debugging message. | |
112 | * | |
113 | * (6/22/2000) pberger and borchers | |
114 | * -- Made cond_wait_... inline--apparently on SPARC the flags arg | |
115 | * to spin_lock_irqsave cannot be passed to another function | |
116 | * to call spin_unlock_irqrestore. Thanks to Pauline Middelink. | |
117 | * -- In digi_set_modem_signals the inner nested spin locks use just | |
118 | * spin_lock() rather than spin_lock_irqsave(). The old code | |
119 | * mistakenly left interrupts off. Thanks to Pauline Middelink. | |
120 | * -- copy_from_user (which can sleep) is no longer called while a | |
121 | * spinlock is held. We copy to a local buffer before getting | |
122 | * the spinlock--don't like the extra copy but the code is simpler. | |
123 | * -- Printk and dbg are no longer called while a spin lock is held. | |
124 | * | |
125 | * (6/4/2000) pberger and borchers | |
126 | * -- Replaced separate calls to spin_unlock_irqrestore and | |
127 | * interruptible_sleep_on_timeout with a new function | |
128 | * cond_wait_interruptible_timeout_irqrestore. This eliminates | |
129 | * the race condition where the wake up could happen after | |
130 | * the unlock and before the sleep. | |
131 | * -- Close now waits for output to drain. | |
132 | * -- Open waits until any close in progress is finished. | |
133 | * -- All out of band responses are now processed, not just the | |
134 | * first in a USB packet. | |
135 | * -- Fixed a bug that prevented the driver from working when the | |
136 | * first Digi port was not the first USB serial port--the driver | |
137 | * was mistakenly using the external USB serial port number to | |
138 | * try to index into its internal ports. | |
139 | * -- Fixed an SMP bug -- write_bulk_callback is called directly from | |
140 | * an interrupt, so spin_lock_irqsave/spin_unlock_irqrestore are | |
141 | * needed for locks outside write_bulk_callback that are also | |
142 | * acquired by write_bulk_callback to prevent deadlocks. | |
143 | * -- Fixed support for select() by making digi_chars_in_buffer() | |
144 | * return 256 when -EINPROGRESS is set, as the line discipline | |
145 | * code in n_tty.c expects. | |
146 | * -- Fixed an include file ordering problem that prevented debugging | |
147 | * messages from working. | |
148 | * -- Fixed an intermittent timeout problem that caused writes to | |
149 | * sometimes get stuck on some machines on some kernels. It turns | |
150 | * out in these circumstances write_chan() (in n_tty.c) was | |
151 | * asleep waiting for our wakeup call. Even though we call | |
152 | * wake_up_interruptible() in digi_write_bulk_callback(), there is | |
153 | * a race condition that could cause the wakeup to fail: if our | |
154 | * wake_up_interruptible() call occurs between the time that our | |
155 | * driver write routine finishes and write_chan() sets current->state | |
156 | * to TASK_INTERRUPTIBLE, the effect of our wakeup setting the state | |
157 | * to TASK_RUNNING will be lost and write_chan's subsequent call to | |
158 | * schedule() will never return (unless it catches a signal). | |
159 | * This race condition occurs because write_bulk_callback() (and thus | |
0779bf2d | 160 | * the wakeup) are called asynchronously from an interrupt, rather than |
1da177e4 LT |
161 | * from the scheduler. We can avoid the race by calling the wakeup |
162 | * from the scheduler queue and that's our fix: Now, at the end of | |
163 | * write_bulk_callback() we queue up a wakeup call on the scheduler | |
164 | * task queue. We still also invoke the wakeup directly since that | |
165 | * squeezes a bit more performance out of the driver, and any lost | |
166 | * race conditions will get cleaned up at the next scheduler run. | |
167 | * | |
168 | * NOTE: The problem also goes away if you comment out | |
169 | * the two code lines in write_chan() where current->state | |
170 | * is set to TASK_RUNNING just before calling driver.write() and to | |
171 | * TASK_INTERRUPTIBLE immediately afterwards. This is why the | |
172 | * problem did not show up with the 2.2 kernels -- they do not | |
173 | * include that code. | |
174 | * | |
175 | * (5/16/2000) pberger and borchers | |
176 | * -- Added timeouts to sleeps, to defend against lost wake ups. | |
177 | * -- Handle transition to/from B0 baud rate in digi_set_termios. | |
178 | * | |
179 | * (5/13/2000) pberger and borchers | |
180 | * -- All commands now sent on out of band port, using | |
181 | * digi_write_oob_command. | |
182 | * -- Get modem control signals whenever they change, support TIOCMGET/ | |
183 | * SET/BIS/BIC ioctls. | |
184 | * -- digi_set_termios now supports parity, word size, stop bits, and | |
185 | * receive enable. | |
186 | * -- Cleaned up open and close, use digi_set_termios and | |
187 | * digi_write_oob_command to set port parameters. | |
188 | * -- Added digi_startup_device to start read chains on all ports. | |
189 | * -- Write buffer is only used when count==1, to be sure put_char can | |
190 | * write a char (unless the buffer is full). | |
191 | * | |
192 | * (5/10/2000) pberger and borchers | |
193 | * -- Added MOD_INC_USE_COUNT/MOD_DEC_USE_COUNT calls on open/close. | |
194 | * -- Fixed problem where the first incoming character is lost on | |
195 | * port opens after the first close on that port. Now we keep | |
196 | * the read_urb chain open until shutdown. | |
197 | * -- Added more port conditioning calls in digi_open and digi_close. | |
198 | * -- Convert port->active to a use count so that we can deal with multiple | |
199 | * opens and closes properly. | |
200 | * -- Fixed some problems with the locking code. | |
201 | * | |
202 | * (5/3/2000) pberger and borchers | |
203 | * -- First alpha version of the driver--many known limitations and bugs. | |
204 | * | |
205 | * | |
206 | * Locking and SMP | |
207 | * | |
208 | * - Each port, including the out-of-band port, has a lock used to | |
209 | * serialize all access to the port's private structure. | |
210 | * - The port lock is also used to serialize all writes and access to | |
211 | * the port's URB. | |
212 | * - The port lock is also used for the port write_wait condition | |
213 | * variable. Holding the port lock will prevent a wake up on the | |
214 | * port's write_wait; this can be used with cond_wait_... to be sure | |
215 | * the wake up is not lost in a race when dropping the lock and | |
216 | * sleeping waiting for the wakeup. | |
217 | * - digi_write() does not sleep, since it is sometimes called on | |
218 | * interrupt time. | |
219 | * - digi_write_bulk_callback() and digi_read_bulk_callback() are | |
220 | * called directly from interrupts. Hence spin_lock_irqsave() | |
221 | * and spin_unlock_irqrestore() are used in the rest of the code | |
222 | * for any locks they acquire. | |
223 | * - digi_write_bulk_callback() gets the port lock before waking up | |
224 | * processes sleeping on the port write_wait. It also schedules | |
225 | * wake ups so they happen from the scheduler, because the tty | |
226 | * system can miss wake ups from interrupts. | |
227 | * - All sleeps use a timeout of DIGI_RETRY_TIMEOUT before looping to | |
228 | * recheck the condition they are sleeping on. This is defensive, | |
229 | * in case a wake up is lost. | |
230 | * - Following Documentation/DocBook/kernel-locking.pdf no spin locks | |
231 | * are held when calling copy_to/from_user or printk. | |
1da177e4 LT |
232 | */ |
233 | ||
1da177e4 LT |
234 | #include <linux/kernel.h> |
235 | #include <linux/errno.h> | |
236 | #include <linux/init.h> | |
237 | #include <linux/slab.h> | |
238 | #include <linux/tty.h> | |
239 | #include <linux/tty_driver.h> | |
240 | #include <linux/tty_flip.h> | |
241 | #include <linux/module.h> | |
242 | #include <linux/spinlock.h> | |
243 | #include <linux/workqueue.h> | |
41ad427d | 244 | #include <linux/uaccess.h> |
1da177e4 LT |
245 | #include <linux/usb.h> |
246 | #include <linux/wait.h> | |
a969888c | 247 | #include <linux/usb/serial.h> |
1da177e4 LT |
248 | |
249 | /* Defines */ | |
250 | ||
251 | /* | |
252 | * Version Information | |
253 | */ | |
254 | #define DRIVER_VERSION "v1.80.1.2" | |
255 | #define DRIVER_AUTHOR "Peter Berger <pberger@brimson.com>, Al Borchers <borchers@steinerpoint.com>" | |
256 | #define DRIVER_DESC "Digi AccelePort USB-2/USB-4 Serial Converter driver" | |
257 | ||
258 | /* port output buffer length -- must be <= transfer buffer length - 2 */ | |
259 | /* so we can be sure to send the full buffer in one urb */ | |
260 | #define DIGI_OUT_BUF_SIZE 8 | |
261 | ||
262 | /* port input buffer length -- must be >= transfer buffer length - 3 */ | |
263 | /* so we can be sure to hold at least one full buffer from one urb */ | |
264 | #define DIGI_IN_BUF_SIZE 64 | |
265 | ||
266 | /* retry timeout while sleeping */ | |
267 | #define DIGI_RETRY_TIMEOUT (HZ/10) | |
268 | ||
269 | /* timeout while waiting for tty output to drain in close */ | |
270 | /* this delay is used twice in close, so the total delay could */ | |
271 | /* be twice this value */ | |
272 | #define DIGI_CLOSE_TIMEOUT (5*HZ) | |
273 | ||
274 | ||
275 | /* AccelePort USB Defines */ | |
276 | ||
277 | /* ids */ | |
278 | #define DIGI_VENDOR_ID 0x05c5 | |
279 | #define DIGI_2_ID 0x0002 /* USB-2 */ | |
280 | #define DIGI_4_ID 0x0004 /* USB-4 */ | |
281 | ||
282 | /* commands | |
283 | * "INB": can be used on the in-band endpoint | |
284 | * "OOB": can be used on the out-of-band endpoint | |
285 | */ | |
286 | #define DIGI_CMD_SET_BAUD_RATE 0 /* INB, OOB */ | |
287 | #define DIGI_CMD_SET_WORD_SIZE 1 /* INB, OOB */ | |
288 | #define DIGI_CMD_SET_PARITY 2 /* INB, OOB */ | |
289 | #define DIGI_CMD_SET_STOP_BITS 3 /* INB, OOB */ | |
290 | #define DIGI_CMD_SET_INPUT_FLOW_CONTROL 4 /* INB, OOB */ | |
291 | #define DIGI_CMD_SET_OUTPUT_FLOW_CONTROL 5 /* INB, OOB */ | |
292 | #define DIGI_CMD_SET_DTR_SIGNAL 6 /* INB, OOB */ | |
293 | #define DIGI_CMD_SET_RTS_SIGNAL 7 /* INB, OOB */ | |
294 | #define DIGI_CMD_READ_INPUT_SIGNALS 8 /* OOB */ | |
295 | #define DIGI_CMD_IFLUSH_FIFO 9 /* OOB */ | |
296 | #define DIGI_CMD_RECEIVE_ENABLE 10 /* INB, OOB */ | |
297 | #define DIGI_CMD_BREAK_CONTROL 11 /* INB, OOB */ | |
298 | #define DIGI_CMD_LOCAL_LOOPBACK 12 /* INB, OOB */ | |
299 | #define DIGI_CMD_TRANSMIT_IDLE 13 /* INB, OOB */ | |
300 | #define DIGI_CMD_READ_UART_REGISTER 14 /* OOB */ | |
301 | #define DIGI_CMD_WRITE_UART_REGISTER 15 /* INB, OOB */ | |
302 | #define DIGI_CMD_AND_UART_REGISTER 16 /* INB, OOB */ | |
303 | #define DIGI_CMD_OR_UART_REGISTER 17 /* INB, OOB */ | |
304 | #define DIGI_CMD_SEND_DATA 18 /* INB */ | |
305 | #define DIGI_CMD_RECEIVE_DATA 19 /* INB */ | |
306 | #define DIGI_CMD_RECEIVE_DISABLE 20 /* INB */ | |
307 | #define DIGI_CMD_GET_PORT_TYPE 21 /* OOB */ | |
308 | ||
309 | /* baud rates */ | |
310 | #define DIGI_BAUD_50 0 | |
311 | #define DIGI_BAUD_75 1 | |
312 | #define DIGI_BAUD_110 2 | |
313 | #define DIGI_BAUD_150 3 | |
314 | #define DIGI_BAUD_200 4 | |
315 | #define DIGI_BAUD_300 5 | |
316 | #define DIGI_BAUD_600 6 | |
317 | #define DIGI_BAUD_1200 7 | |
318 | #define DIGI_BAUD_1800 8 | |
319 | #define DIGI_BAUD_2400 9 | |
320 | #define DIGI_BAUD_4800 10 | |
321 | #define DIGI_BAUD_7200 11 | |
322 | #define DIGI_BAUD_9600 12 | |
323 | #define DIGI_BAUD_14400 13 | |
324 | #define DIGI_BAUD_19200 14 | |
325 | #define DIGI_BAUD_28800 15 | |
326 | #define DIGI_BAUD_38400 16 | |
327 | #define DIGI_BAUD_57600 17 | |
328 | #define DIGI_BAUD_76800 18 | |
329 | #define DIGI_BAUD_115200 19 | |
330 | #define DIGI_BAUD_153600 20 | |
331 | #define DIGI_BAUD_230400 21 | |
332 | #define DIGI_BAUD_460800 22 | |
333 | ||
334 | /* arguments */ | |
335 | #define DIGI_WORD_SIZE_5 0 | |
336 | #define DIGI_WORD_SIZE_6 1 | |
337 | #define DIGI_WORD_SIZE_7 2 | |
338 | #define DIGI_WORD_SIZE_8 3 | |
339 | ||
340 | #define DIGI_PARITY_NONE 0 | |
341 | #define DIGI_PARITY_ODD 1 | |
342 | #define DIGI_PARITY_EVEN 2 | |
343 | #define DIGI_PARITY_MARK 3 | |
344 | #define DIGI_PARITY_SPACE 4 | |
345 | ||
346 | #define DIGI_STOP_BITS_1 0 | |
347 | #define DIGI_STOP_BITS_2 1 | |
348 | ||
349 | #define DIGI_INPUT_FLOW_CONTROL_XON_XOFF 1 | |
350 | #define DIGI_INPUT_FLOW_CONTROL_RTS 2 | |
351 | #define DIGI_INPUT_FLOW_CONTROL_DTR 4 | |
352 | ||
353 | #define DIGI_OUTPUT_FLOW_CONTROL_XON_XOFF 1 | |
354 | #define DIGI_OUTPUT_FLOW_CONTROL_CTS 2 | |
355 | #define DIGI_OUTPUT_FLOW_CONTROL_DSR 4 | |
356 | ||
357 | #define DIGI_DTR_INACTIVE 0 | |
358 | #define DIGI_DTR_ACTIVE 1 | |
359 | #define DIGI_DTR_INPUT_FLOW_CONTROL 2 | |
360 | ||
361 | #define DIGI_RTS_INACTIVE 0 | |
362 | #define DIGI_RTS_ACTIVE 1 | |
363 | #define DIGI_RTS_INPUT_FLOW_CONTROL 2 | |
364 | #define DIGI_RTS_TOGGLE 3 | |
365 | ||
366 | #define DIGI_FLUSH_TX 1 | |
367 | #define DIGI_FLUSH_RX 2 | |
368 | #define DIGI_RESUME_TX 4 /* clears xoff condition */ | |
369 | ||
370 | #define DIGI_TRANSMIT_NOT_IDLE 0 | |
371 | #define DIGI_TRANSMIT_IDLE 1 | |
372 | ||
373 | #define DIGI_DISABLE 0 | |
374 | #define DIGI_ENABLE 1 | |
375 | ||
376 | #define DIGI_DEASSERT 0 | |
377 | #define DIGI_ASSERT 1 | |
378 | ||
379 | /* in band status codes */ | |
380 | #define DIGI_OVERRUN_ERROR 4 | |
381 | #define DIGI_PARITY_ERROR 8 | |
382 | #define DIGI_FRAMING_ERROR 16 | |
383 | #define DIGI_BREAK_ERROR 32 | |
384 | ||
385 | /* out of band status */ | |
386 | #define DIGI_NO_ERROR 0 | |
387 | #define DIGI_BAD_FIRST_PARAMETER 1 | |
388 | #define DIGI_BAD_SECOND_PARAMETER 2 | |
389 | #define DIGI_INVALID_LINE 3 | |
390 | #define DIGI_INVALID_OPCODE 4 | |
391 | ||
392 | /* input signals */ | |
393 | #define DIGI_READ_INPUT_SIGNALS_SLOT 1 | |
394 | #define DIGI_READ_INPUT_SIGNALS_ERR 2 | |
395 | #define DIGI_READ_INPUT_SIGNALS_BUSY 4 | |
396 | #define DIGI_READ_INPUT_SIGNALS_PE 8 | |
397 | #define DIGI_READ_INPUT_SIGNALS_CTS 16 | |
398 | #define DIGI_READ_INPUT_SIGNALS_DSR 32 | |
399 | #define DIGI_READ_INPUT_SIGNALS_RI 64 | |
400 | #define DIGI_READ_INPUT_SIGNALS_DCD 128 | |
401 | ||
402 | ||
403 | /* Structures */ | |
404 | ||
405 | struct digi_serial { | |
406 | spinlock_t ds_serial_lock; | |
407 | struct usb_serial_port *ds_oob_port; /* out-of-band port */ | |
408 | int ds_oob_port_num; /* index of out-of-band port */ | |
409 | int ds_device_started; | |
410 | }; | |
411 | ||
412 | struct digi_port { | |
413 | spinlock_t dp_port_lock; | |
414 | int dp_port_num; | |
415 | int dp_out_buf_len; | |
416 | unsigned char dp_out_buf[DIGI_OUT_BUF_SIZE]; | |
1da177e4 LT |
417 | int dp_write_urb_in_use; |
418 | unsigned int dp_modem_signals; | |
419 | wait_queue_head_t dp_modem_change_wait; | |
420 | int dp_transmit_idle; | |
421 | wait_queue_head_t dp_transmit_idle_wait; | |
422 | int dp_throttled; | |
423 | int dp_throttle_restart; | |
424 | wait_queue_head_t dp_flush_wait; | |
425 | int dp_in_close; /* close in progress */ | |
426 | wait_queue_head_t dp_close_wait; /* wait queue for close */ | |
427 | struct work_struct dp_wakeup_work; | |
c4028958 | 428 | struct usb_serial_port *dp_port; |
1da177e4 LT |
429 | }; |
430 | ||
431 | ||
432 | /* Local Function Declarations */ | |
433 | ||
c6d61269 | 434 | static void digi_wakeup_write(struct usb_serial_port *port); |
c4028958 | 435 | static void digi_wakeup_write_lock(struct work_struct *work); |
c6d61269 AC |
436 | static int digi_write_oob_command(struct usb_serial_port *port, |
437 | unsigned char *buf, int count, int interruptible); | |
438 | static int digi_write_inb_command(struct usb_serial_port *port, | |
439 | unsigned char *buf, int count, unsigned long timeout); | |
440 | static int digi_set_modem_signals(struct usb_serial_port *port, | |
441 | unsigned int modem_signals, int interruptible); | |
442 | static int digi_transmit_idle(struct usb_serial_port *port, | |
443 | unsigned long timeout); | |
41ad427d AC |
444 | static void digi_rx_throttle(struct tty_struct *tty); |
445 | static void digi_rx_unthrottle(struct tty_struct *tty); | |
95da310e AC |
446 | static void digi_set_termios(struct tty_struct *tty, |
447 | struct usb_serial_port *port, struct ktermios *old_termios); | |
448 | static void digi_break_ctl(struct tty_struct *tty, int break_state); | |
449 | static int digi_tiocmget(struct tty_struct *tty, struct file *file); | |
450 | static int digi_tiocmset(struct tty_struct *tty, struct file *file, | |
c6d61269 | 451 | unsigned int set, unsigned int clear); |
95da310e AC |
452 | static int digi_write(struct tty_struct *tty, struct usb_serial_port *port, |
453 | const unsigned char *buf, int count); | |
c6d61269 | 454 | static void digi_write_bulk_callback(struct urb *urb); |
95da310e AC |
455 | static int digi_write_room(struct tty_struct *tty); |
456 | static int digi_chars_in_buffer(struct tty_struct *tty); | |
457 | static int digi_open(struct tty_struct *tty, struct usb_serial_port *port, | |
458 | struct file *filp); | |
459 | static void digi_close(struct tty_struct *tty, struct usb_serial_port *port, | |
460 | struct file *filp); | |
c6d61269 AC |
461 | static int digi_startup_device(struct usb_serial *serial); |
462 | static int digi_startup(struct usb_serial *serial); | |
463 | static void digi_shutdown(struct usb_serial *serial); | |
464 | static void digi_read_bulk_callback(struct urb *urb); | |
465 | static int digi_read_inb_callback(struct urb *urb); | |
466 | static int digi_read_oob_callback(struct urb *urb); | |
1da177e4 LT |
467 | |
468 | ||
469 | /* Statics */ | |
470 | ||
471 | static int debug; | |
472 | ||
473 | static struct usb_device_id id_table_combined [] = { | |
474 | { USB_DEVICE(DIGI_VENDOR_ID, DIGI_2_ID) }, | |
475 | { USB_DEVICE(DIGI_VENDOR_ID, DIGI_4_ID) }, | |
476 | { } /* Terminating entry */ | |
477 | }; | |
478 | ||
479 | static struct usb_device_id id_table_2 [] = { | |
480 | { USB_DEVICE(DIGI_VENDOR_ID, DIGI_2_ID) }, | |
481 | { } /* Terminating entry */ | |
482 | }; | |
483 | ||
484 | static struct usb_device_id id_table_4 [] = { | |
485 | { USB_DEVICE(DIGI_VENDOR_ID, DIGI_4_ID) }, | |
486 | { } /* Terminating entry */ | |
487 | }; | |
488 | ||
41ad427d | 489 | MODULE_DEVICE_TABLE(usb, id_table_combined); |
1da177e4 LT |
490 | |
491 | static struct usb_driver digi_driver = { | |
1da177e4 LT |
492 | .name = "digi_acceleport", |
493 | .probe = usb_serial_probe, | |
494 | .disconnect = usb_serial_disconnect, | |
495 | .id_table = id_table_combined, | |
ba9dc657 | 496 | .no_dynamic_id = 1, |
1da177e4 LT |
497 | }; |
498 | ||
499 | ||
500 | /* device info needed for the Digi serial converter */ | |
501 | ||
ea65370d | 502 | static struct usb_serial_driver digi_acceleport_2_device = { |
18fcac35 | 503 | .driver = { |
269bda1c GKH |
504 | .owner = THIS_MODULE, |
505 | .name = "digi_2", | |
18fcac35 | 506 | }, |
269bda1c | 507 | .description = "Digi 2 port USB adapter", |
d9b1b787 | 508 | .usb_driver = &digi_driver, |
1da177e4 | 509 | .id_table = id_table_2, |
1da177e4 LT |
510 | .num_ports = 3, |
511 | .open = digi_open, | |
512 | .close = digi_close, | |
513 | .write = digi_write, | |
514 | .write_room = digi_write_room, | |
515 | .write_bulk_callback = digi_write_bulk_callback, | |
516 | .read_bulk_callback = digi_read_bulk_callback, | |
517 | .chars_in_buffer = digi_chars_in_buffer, | |
518 | .throttle = digi_rx_throttle, | |
519 | .unthrottle = digi_rx_unthrottle, | |
1da177e4 LT |
520 | .set_termios = digi_set_termios, |
521 | .break_ctl = digi_break_ctl, | |
522 | .tiocmget = digi_tiocmget, | |
523 | .tiocmset = digi_tiocmset, | |
524 | .attach = digi_startup, | |
525 | .shutdown = digi_shutdown, | |
526 | }; | |
527 | ||
ea65370d | 528 | static struct usb_serial_driver digi_acceleport_4_device = { |
18fcac35 | 529 | .driver = { |
269bda1c GKH |
530 | .owner = THIS_MODULE, |
531 | .name = "digi_4", | |
18fcac35 | 532 | }, |
269bda1c | 533 | .description = "Digi 4 port USB adapter", |
d9b1b787 | 534 | .usb_driver = &digi_driver, |
1da177e4 | 535 | .id_table = id_table_4, |
1da177e4 LT |
536 | .num_ports = 4, |
537 | .open = digi_open, | |
538 | .close = digi_close, | |
539 | .write = digi_write, | |
540 | .write_room = digi_write_room, | |
541 | .write_bulk_callback = digi_write_bulk_callback, | |
542 | .read_bulk_callback = digi_read_bulk_callback, | |
543 | .chars_in_buffer = digi_chars_in_buffer, | |
544 | .throttle = digi_rx_throttle, | |
545 | .unthrottle = digi_rx_unthrottle, | |
1da177e4 LT |
546 | .set_termios = digi_set_termios, |
547 | .break_ctl = digi_break_ctl, | |
548 | .tiocmget = digi_tiocmget, | |
549 | .tiocmset = digi_tiocmset, | |
550 | .attach = digi_startup, | |
551 | .shutdown = digi_shutdown, | |
552 | }; | |
553 | ||
554 | ||
555 | /* Functions */ | |
556 | ||
557 | /* | |
41ad427d AC |
558 | * Cond Wait Interruptible Timeout Irqrestore |
559 | * | |
560 | * Do spin_unlock_irqrestore and interruptible_sleep_on_timeout | |
561 | * so that wake ups are not lost if they occur between the unlock | |
562 | * and the sleep. In other words, spin_unlock_irqrestore and | |
563 | * interruptible_sleep_on_timeout are "atomic" with respect to | |
564 | * wake ups. This is used to implement condition variables. | |
565 | * | |
566 | * interruptible_sleep_on_timeout is deprecated and has been replaced | |
567 | * with the equivalent code. | |
568 | */ | |
1da177e4 | 569 | |
c6d61269 | 570 | static long cond_wait_interruptible_timeout_irqrestore( |
1da177e4 | 571 | wait_queue_head_t *q, long timeout, |
c6d61269 | 572 | spinlock_t *lock, unsigned long flags) |
5a33956a | 573 | __releases(lock) |
1da177e4 LT |
574 | { |
575 | DEFINE_WAIT(wait); | |
576 | ||
45f23f18 | 577 | prepare_to_wait(q, &wait, TASK_INTERRUPTIBLE); |
1da177e4 LT |
578 | spin_unlock_irqrestore(lock, flags); |
579 | timeout = schedule_timeout(timeout); | |
580 | finish_wait(q, &wait); | |
581 | ||
582 | return timeout; | |
1da177e4 LT |
583 | } |
584 | ||
585 | ||
586 | /* | |
41ad427d AC |
587 | * Digi Wakeup Write |
588 | * | |
589 | * Wake up port, line discipline, and tty processes sleeping | |
590 | * on writes. | |
591 | */ | |
1da177e4 | 592 | |
c4028958 | 593 | static void digi_wakeup_write_lock(struct work_struct *work) |
1da177e4 | 594 | { |
41ad427d AC |
595 | struct digi_port *priv = |
596 | container_of(work, struct digi_port, dp_wakeup_work); | |
c4028958 | 597 | struct usb_serial_port *port = priv->dp_port; |
1da177e4 | 598 | unsigned long flags; |
1da177e4 | 599 | |
c6d61269 AC |
600 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
601 | digi_wakeup_write(port); | |
602 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); | |
1da177e4 LT |
603 | } |
604 | ||
c6d61269 | 605 | static void digi_wakeup_write(struct usb_serial_port *port) |
1da177e4 | 606 | { |
4a90f09b AC |
607 | struct tty_struct *tty = tty_port_tty_get(&port->port); |
608 | tty_wakeup(tty); | |
609 | tty_kref_put(tty); | |
1da177e4 LT |
610 | } |
611 | ||
612 | ||
613 | /* | |
41ad427d AC |
614 | * Digi Write OOB Command |
615 | * | |
616 | * Write commands on the out of band port. Commands are 4 | |
617 | * bytes each, multiple commands can be sent at once, and | |
618 | * no command will be split across USB packets. Returns 0 | |
619 | * if successful, -EINTR if interrupted while sleeping and | |
620 | * the interruptible flag is true, or a negative error | |
621 | * returned by usb_submit_urb. | |
622 | */ | |
1da177e4 | 623 | |
c6d61269 AC |
624 | static int digi_write_oob_command(struct usb_serial_port *port, |
625 | unsigned char *buf, int count, int interruptible) | |
1da177e4 LT |
626 | { |
627 | ||
628 | int ret = 0; | |
629 | int len; | |
630 | struct usb_serial_port *oob_port = (struct usb_serial_port *)((struct digi_serial *)(usb_get_serial_data(port->serial)))->ds_oob_port; | |
631 | struct digi_port *oob_priv = usb_get_serial_port_data(oob_port); | |
632 | unsigned long flags = 0; | |
633 | ||
c6d61269 | 634 | dbg("digi_write_oob_command: TOP: port=%d, count=%d", oob_priv->dp_port_num, count); |
1da177e4 | 635 | |
c6d61269 | 636 | spin_lock_irqsave(&oob_priv->dp_port_lock, flags); |
41ad427d AC |
637 | while (count > 0) { |
638 | while (oob_port->write_urb->status == -EINPROGRESS | |
c6d61269 | 639 | || oob_priv->dp_write_urb_in_use) { |
1da177e4 LT |
640 | cond_wait_interruptible_timeout_irqrestore( |
641 | &oob_port->write_wait, DIGI_RETRY_TIMEOUT, | |
c6d61269 AC |
642 | &oob_priv->dp_port_lock, flags); |
643 | if (interruptible && signal_pending(current)) | |
644 | return -EINTR; | |
645 | spin_lock_irqsave(&oob_priv->dp_port_lock, flags); | |
1da177e4 LT |
646 | } |
647 | ||
648 | /* len must be a multiple of 4, so commands are not split */ | |
c6d61269 AC |
649 | len = min(count, oob_port->bulk_out_size); |
650 | if (len > 4) | |
1da177e4 | 651 | len &= ~3; |
c6d61269 | 652 | memcpy(oob_port->write_urb->transfer_buffer, buf, len); |
1da177e4 LT |
653 | oob_port->write_urb->transfer_buffer_length = len; |
654 | oob_port->write_urb->dev = port->serial->dev; | |
41ad427d AC |
655 | ret = usb_submit_urb(oob_port->write_urb, GFP_ATOMIC); |
656 | if (ret == 0) { | |
1da177e4 LT |
657 | oob_priv->dp_write_urb_in_use = 1; |
658 | count -= len; | |
659 | buf += len; | |
660 | } | |
1da177e4 | 661 | } |
c6d61269 AC |
662 | spin_unlock_irqrestore(&oob_priv->dp_port_lock, flags); |
663 | if (ret) | |
194343d9 GKH |
664 | dev_err(&port->dev, "%s: usb_submit_urb failed, ret=%d\n", |
665 | __func__, ret); | |
c6d61269 | 666 | return ret; |
1da177e4 LT |
667 | |
668 | } | |
669 | ||
670 | ||
671 | /* | |
41ad427d AC |
672 | * Digi Write In Band Command |
673 | * | |
674 | * Write commands on the given port. Commands are 4 | |
675 | * bytes each, multiple commands can be sent at once, and | |
676 | * no command will be split across USB packets. If timeout | |
677 | * is non-zero, write in band command will return after | |
678 | * waiting unsuccessfully for the URB status to clear for | |
679 | * timeout ticks. Returns 0 if successful, or a negative | |
680 | * error returned by digi_write. | |
681 | */ | |
1da177e4 | 682 | |
c6d61269 AC |
683 | static int digi_write_inb_command(struct usb_serial_port *port, |
684 | unsigned char *buf, int count, unsigned long timeout) | |
1da177e4 | 685 | { |
1da177e4 LT |
686 | int ret = 0; |
687 | int len; | |
688 | struct digi_port *priv = usb_get_serial_port_data(port); | |
689 | unsigned char *data = port->write_urb->transfer_buffer; | |
690 | unsigned long flags = 0; | |
691 | ||
c6d61269 AC |
692 | dbg("digi_write_inb_command: TOP: port=%d, count=%d", |
693 | priv->dp_port_num, count); | |
1da177e4 | 694 | |
c6d61269 | 695 | if (timeout) |
1da177e4 LT |
696 | timeout += jiffies; |
697 | else | |
698 | timeout = ULONG_MAX; | |
699 | ||
c6d61269 | 700 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
41ad427d AC |
701 | while (count > 0 && ret == 0) { |
702 | while ((port->write_urb->status == -EINPROGRESS | |
703 | || priv->dp_write_urb_in_use) | |
704 | && time_before(jiffies, timeout)) { | |
1da177e4 LT |
705 | cond_wait_interruptible_timeout_irqrestore( |
706 | &port->write_wait, DIGI_RETRY_TIMEOUT, | |
c6d61269 AC |
707 | &priv->dp_port_lock, flags); |
708 | if (signal_pending(current)) | |
709 | return -EINTR; | |
710 | spin_lock_irqsave(&priv->dp_port_lock, flags); | |
1da177e4 LT |
711 | } |
712 | ||
713 | /* len must be a multiple of 4 and small enough to */ | |
714 | /* guarantee the write will send buffered data first, */ | |
715 | /* so commands are in order with data and not split */ | |
c6d61269 AC |
716 | len = min(count, port->bulk_out_size-2-priv->dp_out_buf_len); |
717 | if (len > 4) | |
1da177e4 LT |
718 | len &= ~3; |
719 | ||
720 | /* write any buffered data first */ | |
c6d61269 | 721 | if (priv->dp_out_buf_len > 0) { |
1da177e4 LT |
722 | data[0] = DIGI_CMD_SEND_DATA; |
723 | data[1] = priv->dp_out_buf_len; | |
c6d61269 AC |
724 | memcpy(data + 2, priv->dp_out_buf, |
725 | priv->dp_out_buf_len); | |
726 | memcpy(data + 2 + priv->dp_out_buf_len, buf, len); | |
1da177e4 | 727 | port->write_urb->transfer_buffer_length |
c6d61269 | 728 | = priv->dp_out_buf_len + 2 + len; |
1da177e4 | 729 | } else { |
c6d61269 | 730 | memcpy(data, buf, len); |
1da177e4 LT |
731 | port->write_urb->transfer_buffer_length = len; |
732 | } | |
733 | port->write_urb->dev = port->serial->dev; | |
734 | ||
41ad427d AC |
735 | ret = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
736 | if (ret == 0) { | |
1da177e4 LT |
737 | priv->dp_write_urb_in_use = 1; |
738 | priv->dp_out_buf_len = 0; | |
739 | count -= len; | |
740 | buf += len; | |
741 | } | |
742 | ||
743 | } | |
c6d61269 | 744 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
1da177e4 | 745 | |
c6d61269 | 746 | if (ret) |
194343d9 GKH |
747 | dev_err(&port->dev, |
748 | "%s: usb_submit_urb failed, ret=%d, port=%d\n", | |
441b62c1 | 749 | __func__, ret, priv->dp_port_num); |
c6d61269 | 750 | return ret; |
1da177e4 LT |
751 | } |
752 | ||
753 | ||
754 | /* | |
41ad427d AC |
755 | * Digi Set Modem Signals |
756 | * | |
757 | * Sets or clears DTR and RTS on the port, according to the | |
758 | * modem_signals argument. Use TIOCM_DTR and TIOCM_RTS flags | |
759 | * for the modem_signals argument. Returns 0 if successful, | |
760 | * -EINTR if interrupted while sleeping, or a non-zero error | |
761 | * returned by usb_submit_urb. | |
762 | */ | |
1da177e4 | 763 | |
c6d61269 AC |
764 | static int digi_set_modem_signals(struct usb_serial_port *port, |
765 | unsigned int modem_signals, int interruptible) | |
1da177e4 LT |
766 | { |
767 | ||
768 | int ret; | |
769 | struct digi_port *port_priv = usb_get_serial_port_data(port); | |
41ad427d | 770 | struct usb_serial_port *oob_port = (struct usb_serial_port *) ((struct digi_serial *)(usb_get_serial_data(port->serial)))->ds_oob_port; |
1da177e4 LT |
771 | struct digi_port *oob_priv = usb_get_serial_port_data(oob_port); |
772 | unsigned char *data = oob_port->write_urb->transfer_buffer; | |
773 | unsigned long flags = 0; | |
774 | ||
775 | ||
c6d61269 AC |
776 | dbg("digi_set_modem_signals: TOP: port=%d, modem_signals=0x%x", |
777 | port_priv->dp_port_num, modem_signals); | |
1da177e4 | 778 | |
c6d61269 AC |
779 | spin_lock_irqsave(&oob_priv->dp_port_lock, flags); |
780 | spin_lock(&port_priv->dp_port_lock); | |
1da177e4 | 781 | |
41ad427d AC |
782 | while (oob_port->write_urb->status == -EINPROGRESS || |
783 | oob_priv->dp_write_urb_in_use) { | |
c6d61269 | 784 | spin_unlock(&port_priv->dp_port_lock); |
1da177e4 LT |
785 | cond_wait_interruptible_timeout_irqrestore( |
786 | &oob_port->write_wait, DIGI_RETRY_TIMEOUT, | |
c6d61269 AC |
787 | &oob_priv->dp_port_lock, flags); |
788 | if (interruptible && signal_pending(current)) | |
789 | return -EINTR; | |
790 | spin_lock_irqsave(&oob_priv->dp_port_lock, flags); | |
791 | spin_lock(&port_priv->dp_port_lock); | |
1da177e4 | 792 | } |
1da177e4 LT |
793 | data[0] = DIGI_CMD_SET_DTR_SIGNAL; |
794 | data[1] = port_priv->dp_port_num; | |
41ad427d AC |
795 | data[2] = (modem_signals & TIOCM_DTR) ? |
796 | DIGI_DTR_ACTIVE : DIGI_DTR_INACTIVE; | |
1da177e4 | 797 | data[3] = 0; |
1da177e4 LT |
798 | data[4] = DIGI_CMD_SET_RTS_SIGNAL; |
799 | data[5] = port_priv->dp_port_num; | |
41ad427d AC |
800 | data[6] = (modem_signals & TIOCM_RTS) ? |
801 | DIGI_RTS_ACTIVE : DIGI_RTS_INACTIVE; | |
1da177e4 LT |
802 | data[7] = 0; |
803 | ||
804 | oob_port->write_urb->transfer_buffer_length = 8; | |
805 | oob_port->write_urb->dev = port->serial->dev; | |
806 | ||
41ad427d AC |
807 | ret = usb_submit_urb(oob_port->write_urb, GFP_ATOMIC); |
808 | if (ret == 0) { | |
1da177e4 LT |
809 | oob_priv->dp_write_urb_in_use = 1; |
810 | port_priv->dp_modem_signals = | |
811 | (port_priv->dp_modem_signals&~(TIOCM_DTR|TIOCM_RTS)) | |
812 | | (modem_signals&(TIOCM_DTR|TIOCM_RTS)); | |
813 | } | |
c6d61269 AC |
814 | spin_unlock(&port_priv->dp_port_lock); |
815 | spin_unlock_irqrestore(&oob_priv->dp_port_lock, flags); | |
816 | if (ret) | |
194343d9 GKH |
817 | dev_err(&port->dev, "%s: usb_submit_urb failed, ret=%d\n", |
818 | __func__, ret); | |
c6d61269 | 819 | return ret; |
1da177e4 LT |
820 | } |
821 | ||
1da177e4 | 822 | /* |
41ad427d AC |
823 | * Digi Transmit Idle |
824 | * | |
825 | * Digi transmit idle waits, up to timeout ticks, for the transmitter | |
826 | * to go idle. It returns 0 if successful or a negative error. | |
827 | * | |
828 | * There are race conditions here if more than one process is calling | |
829 | * digi_transmit_idle on the same port at the same time. However, this | |
830 | * is only called from close, and only one process can be in close on a | |
831 | * port at a time, so its ok. | |
832 | */ | |
1da177e4 | 833 | |
c6d61269 AC |
834 | static int digi_transmit_idle(struct usb_serial_port *port, |
835 | unsigned long timeout) | |
1da177e4 | 836 | { |
1da177e4 LT |
837 | int ret; |
838 | unsigned char buf[2]; | |
839 | struct digi_port *priv = usb_get_serial_port_data(port); | |
840 | unsigned long flags = 0; | |
841 | ||
c6d61269 | 842 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 | 843 | priv->dp_transmit_idle = 0; |
c6d61269 | 844 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
1da177e4 LT |
845 | |
846 | buf[0] = DIGI_CMD_TRANSMIT_IDLE; | |
847 | buf[1] = 0; | |
848 | ||
849 | timeout += jiffies; | |
850 | ||
41ad427d AC |
851 | ret = digi_write_inb_command(port, buf, 2, timeout - jiffies); |
852 | if (ret != 0) | |
c6d61269 | 853 | return ret; |
1da177e4 | 854 | |
c6d61269 | 855 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 | 856 | |
41ad427d | 857 | while (time_before(jiffies, timeout) && !priv->dp_transmit_idle) { |
1da177e4 LT |
858 | cond_wait_interruptible_timeout_irqrestore( |
859 | &priv->dp_transmit_idle_wait, DIGI_RETRY_TIMEOUT, | |
c6d61269 AC |
860 | &priv->dp_port_lock, flags); |
861 | if (signal_pending(current)) | |
862 | return -EINTR; | |
863 | spin_lock_irqsave(&priv->dp_port_lock, flags); | |
1da177e4 | 864 | } |
1da177e4 | 865 | priv->dp_transmit_idle = 0; |
c6d61269 AC |
866 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
867 | return 0; | |
1da177e4 LT |
868 | |
869 | } | |
870 | ||
871 | ||
95da310e | 872 | static void digi_rx_throttle(struct tty_struct *tty) |
1da177e4 | 873 | { |
1da177e4 | 874 | unsigned long flags; |
95da310e | 875 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
876 | struct digi_port *priv = usb_get_serial_port_data(port); |
877 | ||
878 | ||
c6d61269 | 879 | dbg("digi_rx_throttle: TOP: port=%d", priv->dp_port_num); |
1da177e4 LT |
880 | |
881 | /* stop receiving characters by not resubmitting the read urb */ | |
c6d61269 | 882 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 LT |
883 | priv->dp_throttled = 1; |
884 | priv->dp_throttle_restart = 0; | |
c6d61269 | 885 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
1da177e4 LT |
886 | } |
887 | ||
888 | ||
95da310e | 889 | static void digi_rx_unthrottle(struct tty_struct *tty) |
1da177e4 | 890 | { |
1da177e4 | 891 | int ret = 0; |
1da177e4 | 892 | unsigned long flags; |
95da310e | 893 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 894 | struct digi_port *priv = usb_get_serial_port_data(port); |
1da177e4 | 895 | |
c6d61269 | 896 | dbg("digi_rx_unthrottle: TOP: port=%d", priv->dp_port_num); |
1da177e4 | 897 | |
c6d61269 | 898 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 | 899 | |
39892da4 ON |
900 | /* turn throttle off */ |
901 | priv->dp_throttled = 0; | |
39892da4 | 902 | priv->dp_throttle_restart = 0; |
1da177e4 LT |
903 | |
904 | /* restart read chain */ | |
c6d61269 | 905 | if (priv->dp_throttle_restart) { |
1da177e4 | 906 | port->read_urb->dev = port->serial->dev; |
c6d61269 | 907 | ret = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
1da177e4 LT |
908 | } |
909 | ||
c6d61269 | 910 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
1da177e4 | 911 | |
c6d61269 | 912 | if (ret) |
194343d9 GKH |
913 | dev_err(&port->dev, |
914 | "%s: usb_submit_urb failed, ret=%d, port=%d\n", | |
441b62c1 | 915 | __func__, ret, priv->dp_port_num); |
1da177e4 LT |
916 | } |
917 | ||
918 | ||
41ad427d | 919 | static void digi_set_termios(struct tty_struct *tty, |
95da310e | 920 | struct usb_serial_port *port, struct ktermios *old_termios) |
1da177e4 | 921 | { |
1da177e4 | 922 | struct digi_port *priv = usb_get_serial_port_data(port); |
c6d61269 AC |
923 | unsigned int iflag = tty->termios->c_iflag; |
924 | unsigned int cflag = tty->termios->c_cflag; | |
1da177e4 LT |
925 | unsigned int old_iflag = old_termios->c_iflag; |
926 | unsigned int old_cflag = old_termios->c_cflag; | |
927 | unsigned char buf[32]; | |
928 | unsigned int modem_signals; | |
41ad427d | 929 | int arg, ret; |
1da177e4 | 930 | int i = 0; |
c6d61269 | 931 | speed_t baud; |
1da177e4 | 932 | |
c6d61269 | 933 | dbg("digi_set_termios: TOP: port=%d, iflag=0x%x, old_iflag=0x%x, cflag=0x%x, old_cflag=0x%x", priv->dp_port_num, iflag, old_iflag, cflag, old_cflag); |
1da177e4 LT |
934 | |
935 | /* set baud rate */ | |
41ad427d AC |
936 | baud = tty_get_baud_rate(tty); |
937 | if (baud != tty_termios_baud_rate(old_termios)) { | |
1da177e4 LT |
938 | arg = -1; |
939 | ||
940 | /* reassert DTR and (maybe) RTS on transition from B0 */ | |
c6d61269 | 941 | if ((old_cflag&CBAUD) == B0) { |
1da177e4 LT |
942 | /* don't set RTS if using hardware flow control */ |
943 | /* and throttling input */ | |
944 | modem_signals = TIOCM_DTR; | |
c6d61269 AC |
945 | if (!(tty->termios->c_cflag & CRTSCTS) || |
946 | !test_bit(TTY_THROTTLED, &tty->flags)) | |
1da177e4 | 947 | modem_signals |= TIOCM_RTS; |
c6d61269 | 948 | digi_set_modem_signals(port, modem_signals, 1); |
1da177e4 | 949 | } |
c6d61269 | 950 | switch (baud) { |
41ad427d AC |
951 | /* drop DTR and RTS on transition to B0 */ |
952 | case 0: digi_set_modem_signals(port, 0, 1); break; | |
953 | case 50: arg = DIGI_BAUD_50; break; | |
954 | case 75: arg = DIGI_BAUD_75; break; | |
955 | case 110: arg = DIGI_BAUD_110; break; | |
956 | case 150: arg = DIGI_BAUD_150; break; | |
957 | case 200: arg = DIGI_BAUD_200; break; | |
958 | case 300: arg = DIGI_BAUD_300; break; | |
959 | case 600: arg = DIGI_BAUD_600; break; | |
960 | case 1200: arg = DIGI_BAUD_1200; break; | |
961 | case 1800: arg = DIGI_BAUD_1800; break; | |
962 | case 2400: arg = DIGI_BAUD_2400; break; | |
963 | case 4800: arg = DIGI_BAUD_4800; break; | |
964 | case 9600: arg = DIGI_BAUD_9600; break; | |
965 | case 19200: arg = DIGI_BAUD_19200; break; | |
966 | case 38400: arg = DIGI_BAUD_38400; break; | |
967 | case 57600: arg = DIGI_BAUD_57600; break; | |
968 | case 115200: arg = DIGI_BAUD_115200; break; | |
969 | case 230400: arg = DIGI_BAUD_230400; break; | |
970 | case 460800: arg = DIGI_BAUD_460800; break; | |
971 | default: | |
972 | arg = DIGI_BAUD_9600; | |
973 | baud = 9600; | |
974 | break; | |
1da177e4 | 975 | } |
c6d61269 | 976 | if (arg != -1) { |
1da177e4 LT |
977 | buf[i++] = DIGI_CMD_SET_BAUD_RATE; |
978 | buf[i++] = priv->dp_port_num; | |
979 | buf[i++] = arg; | |
980 | buf[i++] = 0; | |
981 | } | |
1da177e4 | 982 | } |
1da177e4 | 983 | /* set parity */ |
7fa36a99 AC |
984 | tty->termios->c_cflag &= ~CMSPAR; |
985 | ||
c6d61269 AC |
986 | if ((cflag&(PARENB|PARODD)) != (old_cflag&(PARENB|PARODD))) { |
987 | if (cflag&PARENB) { | |
988 | if (cflag&PARODD) | |
1da177e4 LT |
989 | arg = DIGI_PARITY_ODD; |
990 | else | |
991 | arg = DIGI_PARITY_EVEN; | |
992 | } else { | |
993 | arg = DIGI_PARITY_NONE; | |
994 | } | |
1da177e4 LT |
995 | buf[i++] = DIGI_CMD_SET_PARITY; |
996 | buf[i++] = priv->dp_port_num; | |
997 | buf[i++] = arg; | |
998 | buf[i++] = 0; | |
1da177e4 | 999 | } |
1da177e4 | 1000 | /* set word size */ |
c6d61269 | 1001 | if ((cflag&CSIZE) != (old_cflag&CSIZE)) { |
1da177e4 | 1002 | arg = -1; |
c6d61269 | 1003 | switch (cflag&CSIZE) { |
1da177e4 LT |
1004 | case CS5: arg = DIGI_WORD_SIZE_5; break; |
1005 | case CS6: arg = DIGI_WORD_SIZE_6; break; | |
1006 | case CS7: arg = DIGI_WORD_SIZE_7; break; | |
1007 | case CS8: arg = DIGI_WORD_SIZE_8; break; | |
1008 | default: | |
c6d61269 AC |
1009 | dbg("digi_set_termios: can't handle word size %d", |
1010 | (cflag&CSIZE)); | |
1da177e4 LT |
1011 | break; |
1012 | } | |
1013 | ||
c6d61269 | 1014 | if (arg != -1) { |
1da177e4 LT |
1015 | buf[i++] = DIGI_CMD_SET_WORD_SIZE; |
1016 | buf[i++] = priv->dp_port_num; | |
1017 | buf[i++] = arg; | |
1018 | buf[i++] = 0; | |
1019 | } | |
1020 | ||
1021 | } | |
1022 | ||
1023 | /* set stop bits */ | |
c6d61269 | 1024 | if ((cflag&CSTOPB) != (old_cflag&CSTOPB)) { |
1da177e4 | 1025 | |
c6d61269 | 1026 | if ((cflag&CSTOPB)) |
1da177e4 LT |
1027 | arg = DIGI_STOP_BITS_2; |
1028 | else | |
1029 | arg = DIGI_STOP_BITS_1; | |
1030 | ||
1031 | buf[i++] = DIGI_CMD_SET_STOP_BITS; | |
1032 | buf[i++] = priv->dp_port_num; | |
1033 | buf[i++] = arg; | |
1034 | buf[i++] = 0; | |
1035 | ||
1036 | } | |
1037 | ||
1038 | /* set input flow control */ | |
c6d61269 AC |
1039 | if ((iflag&IXOFF) != (old_iflag&IXOFF) |
1040 | || (cflag&CRTSCTS) != (old_cflag&CRTSCTS)) { | |
1da177e4 | 1041 | arg = 0; |
c6d61269 | 1042 | if (iflag&IXOFF) |
1da177e4 LT |
1043 | arg |= DIGI_INPUT_FLOW_CONTROL_XON_XOFF; |
1044 | else | |
1045 | arg &= ~DIGI_INPUT_FLOW_CONTROL_XON_XOFF; | |
1046 | ||
c6d61269 | 1047 | if (cflag&CRTSCTS) { |
1da177e4 LT |
1048 | arg |= DIGI_INPUT_FLOW_CONTROL_RTS; |
1049 | ||
1050 | /* On USB-4 it is necessary to assert RTS prior */ | |
1051 | /* to selecting RTS input flow control. */ | |
1052 | buf[i++] = DIGI_CMD_SET_RTS_SIGNAL; | |
1053 | buf[i++] = priv->dp_port_num; | |
1054 | buf[i++] = DIGI_RTS_ACTIVE; | |
1055 | buf[i++] = 0; | |
1056 | ||
1057 | } else { | |
1058 | arg &= ~DIGI_INPUT_FLOW_CONTROL_RTS; | |
1059 | } | |
1da177e4 LT |
1060 | buf[i++] = DIGI_CMD_SET_INPUT_FLOW_CONTROL; |
1061 | buf[i++] = priv->dp_port_num; | |
1062 | buf[i++] = arg; | |
1063 | buf[i++] = 0; | |
1da177e4 LT |
1064 | } |
1065 | ||
1066 | /* set output flow control */ | |
7fa36a99 AC |
1067 | if ((iflag & IXON) != (old_iflag & IXON) |
1068 | || (cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { | |
1da177e4 | 1069 | arg = 0; |
7fa36a99 | 1070 | if (iflag & IXON) |
1da177e4 LT |
1071 | arg |= DIGI_OUTPUT_FLOW_CONTROL_XON_XOFF; |
1072 | else | |
1073 | arg &= ~DIGI_OUTPUT_FLOW_CONTROL_XON_XOFF; | |
1074 | ||
7fa36a99 | 1075 | if (cflag & CRTSCTS) { |
1da177e4 LT |
1076 | arg |= DIGI_OUTPUT_FLOW_CONTROL_CTS; |
1077 | } else { | |
1078 | arg &= ~DIGI_OUTPUT_FLOW_CONTROL_CTS; | |
c6d61269 | 1079 | tty->hw_stopped = 0; |
1da177e4 LT |
1080 | } |
1081 | ||
1082 | buf[i++] = DIGI_CMD_SET_OUTPUT_FLOW_CONTROL; | |
1083 | buf[i++] = priv->dp_port_num; | |
1084 | buf[i++] = arg; | |
1085 | buf[i++] = 0; | |
1da177e4 LT |
1086 | } |
1087 | ||
1088 | /* set receive enable/disable */ | |
7fa36a99 AC |
1089 | if ((cflag & CREAD) != (old_cflag & CREAD)) { |
1090 | if (cflag & CREAD) | |
1da177e4 LT |
1091 | arg = DIGI_ENABLE; |
1092 | else | |
1093 | arg = DIGI_DISABLE; | |
1094 | ||
1095 | buf[i++] = DIGI_CMD_RECEIVE_ENABLE; | |
1096 | buf[i++] = priv->dp_port_num; | |
1097 | buf[i++] = arg; | |
1098 | buf[i++] = 0; | |
1da177e4 | 1099 | } |
41ad427d AC |
1100 | ret = digi_write_oob_command(port, buf, i, 1); |
1101 | if (ret != 0) | |
c6d61269 | 1102 | dbg("digi_set_termios: write oob failed, ret=%d", ret); |
7fa36a99 | 1103 | tty_encode_baud_rate(tty, baud, baud); |
1da177e4 LT |
1104 | } |
1105 | ||
1106 | ||
95da310e | 1107 | static void digi_break_ctl(struct tty_struct *tty, int break_state) |
1da177e4 | 1108 | { |
95da310e | 1109 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
1110 | unsigned char buf[4]; |
1111 | ||
1da177e4 LT |
1112 | buf[0] = DIGI_CMD_BREAK_CONTROL; |
1113 | buf[1] = 2; /* length */ | |
1114 | buf[2] = break_state ? 1 : 0; | |
1115 | buf[3] = 0; /* pad */ | |
c6d61269 | 1116 | digi_write_inb_command(port, buf, 4, 0); |
1da177e4 LT |
1117 | } |
1118 | ||
1119 | ||
95da310e | 1120 | static int digi_tiocmget(struct tty_struct *tty, struct file *file) |
1da177e4 | 1121 | { |
95da310e | 1122 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
1123 | struct digi_port *priv = usb_get_serial_port_data(port); |
1124 | unsigned int val; | |
1125 | unsigned long flags; | |
1126 | ||
441b62c1 | 1127 | dbg("%s: TOP: port=%d", __func__, priv->dp_port_num); |
1da177e4 | 1128 | |
c6d61269 | 1129 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 | 1130 | val = priv->dp_modem_signals; |
c6d61269 | 1131 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
1da177e4 LT |
1132 | return val; |
1133 | } | |
1134 | ||
1135 | ||
95da310e | 1136 | static int digi_tiocmset(struct tty_struct *tty, struct file *file, |
c6d61269 | 1137 | unsigned int set, unsigned int clear) |
1da177e4 | 1138 | { |
95da310e | 1139 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
1140 | struct digi_port *priv = usb_get_serial_port_data(port); |
1141 | unsigned int val; | |
1142 | unsigned long flags; | |
1143 | ||
441b62c1 | 1144 | dbg("%s: TOP: port=%d", __func__, priv->dp_port_num); |
1da177e4 | 1145 | |
c6d61269 | 1146 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 | 1147 | val = (priv->dp_modem_signals & ~clear) | set; |
c6d61269 AC |
1148 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
1149 | return digi_set_modem_signals(port, val, 1); | |
1da177e4 LT |
1150 | } |
1151 | ||
1152 | ||
95da310e AC |
1153 | static int digi_write(struct tty_struct *tty, struct usb_serial_port *port, |
1154 | const unsigned char *buf, int count) | |
1da177e4 LT |
1155 | { |
1156 | ||
41ad427d | 1157 | int ret, data_len, new_len; |
1da177e4 LT |
1158 | struct digi_port *priv = usb_get_serial_port_data(port); |
1159 | unsigned char *data = port->write_urb->transfer_buffer; | |
1160 | unsigned long flags = 0; | |
1161 | ||
c6d61269 AC |
1162 | dbg("digi_write: TOP: port=%d, count=%d, in_interrupt=%ld", |
1163 | priv->dp_port_num, count, in_interrupt()); | |
1da177e4 LT |
1164 | |
1165 | /* copy user data (which can sleep) before getting spin lock */ | |
c6d61269 AC |
1166 | count = min(count, port->bulk_out_size-2); |
1167 | count = min(64, count); | |
1da177e4 LT |
1168 | |
1169 | /* be sure only one write proceeds at a time */ | |
1170 | /* there are races on the port private buffer */ | |
1171 | /* and races to check write_urb->status */ | |
c6d61269 | 1172 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 LT |
1173 | |
1174 | /* wait for urb status clear to submit another urb */ | |
41ad427d AC |
1175 | if (port->write_urb->status == -EINPROGRESS || |
1176 | priv->dp_write_urb_in_use) { | |
1da177e4 | 1177 | /* buffer data if count is 1 (probably put_char) if possible */ |
c6d61269 | 1178 | if (count == 1 && priv->dp_out_buf_len < DIGI_OUT_BUF_SIZE) { |
1da177e4 LT |
1179 | priv->dp_out_buf[priv->dp_out_buf_len++] = *buf; |
1180 | new_len = 1; | |
1181 | } else { | |
1182 | new_len = 0; | |
1183 | } | |
c6d61269 AC |
1184 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
1185 | return new_len; | |
1da177e4 LT |
1186 | } |
1187 | ||
1188 | /* allow space for any buffered data and for new data, up to */ | |
1189 | /* transfer buffer size - 2 (for command and length bytes) */ | |
1190 | new_len = min(count, port->bulk_out_size-2-priv->dp_out_buf_len); | |
1191 | data_len = new_len + priv->dp_out_buf_len; | |
1192 | ||
c6d61269 AC |
1193 | if (data_len == 0) { |
1194 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); | |
1195 | return 0; | |
1da177e4 LT |
1196 | } |
1197 | ||
1198 | port->write_urb->transfer_buffer_length = data_len+2; | |
1199 | port->write_urb->dev = port->serial->dev; | |
1200 | ||
1201 | *data++ = DIGI_CMD_SEND_DATA; | |
1202 | *data++ = data_len; | |
1203 | ||
1204 | /* copy in buffered data first */ | |
c6d61269 | 1205 | memcpy(data, priv->dp_out_buf, priv->dp_out_buf_len); |
1da177e4 LT |
1206 | data += priv->dp_out_buf_len; |
1207 | ||
1208 | /* copy in new data */ | |
c6d61269 | 1209 | memcpy(data, buf, new_len); |
1da177e4 | 1210 | |
41ad427d AC |
1211 | ret = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
1212 | if (ret == 0) { | |
1da177e4 LT |
1213 | priv->dp_write_urb_in_use = 1; |
1214 | ret = new_len; | |
1215 | priv->dp_out_buf_len = 0; | |
1216 | } | |
1217 | ||
1218 | /* return length of new data written, or error */ | |
c6d61269 AC |
1219 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
1220 | if (ret < 0) | |
194343d9 GKH |
1221 | dev_err(&port->dev, |
1222 | "%s: usb_submit_urb failed, ret=%d, port=%d\n", | |
441b62c1 | 1223 | __func__, ret, priv->dp_port_num); |
c6d61269 AC |
1224 | dbg("digi_write: returning %d", ret); |
1225 | return ret; | |
1da177e4 | 1226 | |
41ad427d | 1227 | } |
1da177e4 | 1228 | |
c6d61269 | 1229 | static void digi_write_bulk_callback(struct urb *urb) |
1da177e4 LT |
1230 | { |
1231 | ||
cdc97792 | 1232 | struct usb_serial_port *port = urb->context; |
1da177e4 LT |
1233 | struct usb_serial *serial; |
1234 | struct digi_port *priv; | |
1235 | struct digi_serial *serial_priv; | |
1236 | int ret = 0; | |
85d75107 | 1237 | int status = urb->status; |
1da177e4 | 1238 | |
c6d61269 | 1239 | dbg("digi_write_bulk_callback: TOP, urb->status=%d", status); |
1da177e4 LT |
1240 | |
1241 | /* port and serial sanity check */ | |
41ad427d | 1242 | if (port == NULL || (priv = usb_get_serial_port_data(port)) == NULL) { |
194343d9 GKH |
1243 | dev_err(&port->dev, |
1244 | "%s: port or port->private is NULL, status=%d\n", | |
1245 | __func__, status); | |
1da177e4 LT |
1246 | return; |
1247 | } | |
1248 | serial = port->serial; | |
41ad427d | 1249 | if (serial == NULL || (serial_priv = usb_get_serial_data(serial)) == NULL) { |
194343d9 GKH |
1250 | dev_err(&port->dev, |
1251 | "%s: serial or serial->private is NULL, status=%d\n", | |
1252 | __func__, status); | |
1da177e4 LT |
1253 | return; |
1254 | } | |
1255 | ||
1256 | /* handle oob callback */ | |
c6d61269 AC |
1257 | if (priv->dp_port_num == serial_priv->ds_oob_port_num) { |
1258 | dbg("digi_write_bulk_callback: oob callback"); | |
1259 | spin_lock(&priv->dp_port_lock); | |
1da177e4 | 1260 | priv->dp_write_urb_in_use = 0; |
c6d61269 AC |
1261 | wake_up_interruptible(&port->write_wait); |
1262 | spin_unlock(&priv->dp_port_lock); | |
1da177e4 LT |
1263 | return; |
1264 | } | |
1265 | ||
1266 | /* try to send any buffered data on this port, if it is open */ | |
c6d61269 | 1267 | spin_lock(&priv->dp_port_lock); |
1da177e4 | 1268 | priv->dp_write_urb_in_use = 0; |
95da310e | 1269 | if (port->port.count && port->write_urb->status != -EINPROGRESS |
c6d61269 | 1270 | && priv->dp_out_buf_len > 0) { |
1da177e4 LT |
1271 | *((unsigned char *)(port->write_urb->transfer_buffer)) |
1272 | = (unsigned char)DIGI_CMD_SEND_DATA; | |
41ad427d | 1273 | *((unsigned char *)(port->write_urb->transfer_buffer) + 1) |
1da177e4 | 1274 | = (unsigned char)priv->dp_out_buf_len; |
41ad427d AC |
1275 | port->write_urb->transfer_buffer_length = |
1276 | priv->dp_out_buf_len + 2; | |
1da177e4 | 1277 | port->write_urb->dev = serial->dev; |
41ad427d | 1278 | memcpy(port->write_urb->transfer_buffer + 2, priv->dp_out_buf, |
c6d61269 | 1279 | priv->dp_out_buf_len); |
41ad427d AC |
1280 | ret = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
1281 | if (ret == 0) { | |
1da177e4 LT |
1282 | priv->dp_write_urb_in_use = 1; |
1283 | priv->dp_out_buf_len = 0; | |
1284 | } | |
1da177e4 | 1285 | } |
1da177e4 | 1286 | /* wake up processes sleeping on writes immediately */ |
c6d61269 | 1287 | digi_wakeup_write(port); |
1da177e4 LT |
1288 | /* also queue up a wakeup at scheduler time, in case we */ |
1289 | /* lost the race in write_chan(). */ | |
1290 | schedule_work(&priv->dp_wakeup_work); | |
1291 | ||
c6d61269 AC |
1292 | spin_unlock(&priv->dp_port_lock); |
1293 | if (ret) | |
194343d9 GKH |
1294 | dev_err(&port->dev, |
1295 | "%s: usb_submit_urb failed, ret=%d, port=%d\n", | |
441b62c1 | 1296 | __func__, ret, priv->dp_port_num); |
1da177e4 LT |
1297 | } |
1298 | ||
95da310e | 1299 | static int digi_write_room(struct tty_struct *tty) |
1da177e4 | 1300 | { |
95da310e | 1301 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 1302 | struct digi_port *priv = usb_get_serial_port_data(port); |
95da310e | 1303 | int room; |
1da177e4 LT |
1304 | unsigned long flags = 0; |
1305 | ||
c6d61269 | 1306 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 | 1307 | |
41ad427d AC |
1308 | if (port->write_urb->status == -EINPROGRESS || |
1309 | priv->dp_write_urb_in_use) | |
1da177e4 LT |
1310 | room = 0; |
1311 | else | |
1312 | room = port->bulk_out_size - 2 - priv->dp_out_buf_len; | |
1313 | ||
c6d61269 AC |
1314 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
1315 | dbg("digi_write_room: port=%d, room=%d", priv->dp_port_num, room); | |
1316 | return room; | |
1da177e4 LT |
1317 | |
1318 | } | |
1319 | ||
95da310e | 1320 | static int digi_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 1321 | { |
95da310e | 1322 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
1323 | struct digi_port *priv = usb_get_serial_port_data(port); |
1324 | ||
c6d61269 AC |
1325 | if (port->write_urb->status == -EINPROGRESS |
1326 | || priv->dp_write_urb_in_use) { | |
1327 | dbg("digi_chars_in_buffer: port=%d, chars=%d", | |
1328 | priv->dp_port_num, port->bulk_out_size - 2); | |
1329 | /* return(port->bulk_out_size - 2); */ | |
1330 | return 256; | |
1da177e4 | 1331 | } else { |
c6d61269 AC |
1332 | dbg("digi_chars_in_buffer: port=%d, chars=%d", |
1333 | priv->dp_port_num, priv->dp_out_buf_len); | |
1334 | return priv->dp_out_buf_len; | |
1da177e4 LT |
1335 | } |
1336 | ||
1337 | } | |
1338 | ||
1339 | ||
95da310e AC |
1340 | static int digi_open(struct tty_struct *tty, struct usb_serial_port *port, |
1341 | struct file *filp) | |
1da177e4 | 1342 | { |
1da177e4 LT |
1343 | int ret; |
1344 | unsigned char buf[32]; | |
1345 | struct digi_port *priv = usb_get_serial_port_data(port); | |
606d099c | 1346 | struct ktermios not_termios; |
1da177e4 LT |
1347 | unsigned long flags = 0; |
1348 | ||
c6d61269 | 1349 | dbg("digi_open: TOP: port=%d, open_count=%d", |
95da310e | 1350 | priv->dp_port_num, port->port.count); |
1da177e4 LT |
1351 | |
1352 | /* be sure the device is started up */ | |
c6d61269 AC |
1353 | if (digi_startup_device(port->serial) != 0) |
1354 | return -ENXIO; | |
1da177e4 | 1355 | |
c6d61269 | 1356 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 LT |
1357 | |
1358 | /* don't wait on a close in progress for non-blocking opens */ | |
c6d61269 AC |
1359 | if (priv->dp_in_close && (filp->f_flags&(O_NDELAY|O_NONBLOCK)) == 0) { |
1360 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); | |
1361 | return -EAGAIN; | |
1da177e4 LT |
1362 | } |
1363 | ||
1364 | /* wait for a close in progress to finish */ | |
41ad427d | 1365 | while (priv->dp_in_close) { |
1da177e4 LT |
1366 | cond_wait_interruptible_timeout_irqrestore( |
1367 | &priv->dp_close_wait, DIGI_RETRY_TIMEOUT, | |
c6d61269 AC |
1368 | &priv->dp_port_lock, flags); |
1369 | if (signal_pending(current)) | |
1370 | return -EINTR; | |
1371 | spin_lock_irqsave(&priv->dp_port_lock, flags); | |
1da177e4 LT |
1372 | } |
1373 | ||
c6d61269 | 1374 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
41ad427d | 1375 | |
1da177e4 LT |
1376 | /* read modem signals automatically whenever they change */ |
1377 | buf[0] = DIGI_CMD_READ_INPUT_SIGNALS; | |
1378 | buf[1] = priv->dp_port_num; | |
1379 | buf[2] = DIGI_ENABLE; | |
1380 | buf[3] = 0; | |
1381 | ||
1382 | /* flush fifos */ | |
1383 | buf[4] = DIGI_CMD_IFLUSH_FIFO; | |
1384 | buf[5] = priv->dp_port_num; | |
1385 | buf[6] = DIGI_FLUSH_TX | DIGI_FLUSH_RX; | |
1386 | buf[7] = 0; | |
1387 | ||
41ad427d AC |
1388 | ret = digi_write_oob_command(port, buf, 8, 1); |
1389 | if (ret != 0) | |
c6d61269 | 1390 | dbg("digi_open: write oob failed, ret=%d", ret); |
1da177e4 LT |
1391 | |
1392 | /* set termios settings */ | |
95da310e AC |
1393 | if (tty) { |
1394 | not_termios.c_cflag = ~tty->termios->c_cflag; | |
1395 | not_termios.c_iflag = ~tty->termios->c_iflag; | |
1396 | digi_set_termios(tty, port, ¬_termios); | |
1397 | } | |
1da177e4 LT |
1398 | |
1399 | /* set DTR and RTS */ | |
c6d61269 | 1400 | digi_set_modem_signals(port, TIOCM_DTR|TIOCM_RTS, 1); |
1da177e4 | 1401 | |
c6d61269 | 1402 | return 0; |
1da177e4 LT |
1403 | } |
1404 | ||
1405 | ||
95da310e AC |
1406 | static void digi_close(struct tty_struct *tty, struct usb_serial_port *port, |
1407 | struct file *filp) | |
1da177e4 LT |
1408 | { |
1409 | DEFINE_WAIT(wait); | |
1410 | int ret; | |
1411 | unsigned char buf[32]; | |
1da177e4 | 1412 | struct digi_port *priv = usb_get_serial_port_data(port); |
1da177e4 | 1413 | |
c6d61269 | 1414 | dbg("digi_close: TOP: port=%d, open_count=%d", |
95da310e | 1415 | priv->dp_port_num, port->port.count); |
1da177e4 | 1416 | |
0915f490 | 1417 | mutex_lock(&port->serial->disc_mutex); |
1da177e4 | 1418 | /* if disconnected, just clear flags */ |
0915f490 | 1419 | if (port->serial->disconnected) |
1da177e4 LT |
1420 | goto exit; |
1421 | ||
1422 | /* do cleanup only after final close on this port */ | |
0915f490 | 1423 | spin_lock_irq(&priv->dp_port_lock); |
1da177e4 | 1424 | priv->dp_in_close = 1; |
0915f490 | 1425 | spin_unlock_irq(&priv->dp_port_lock); |
1da177e4 LT |
1426 | |
1427 | /* tell line discipline to process only XON/XOFF */ | |
1428 | tty->closing = 1; | |
1429 | ||
1430 | /* wait for output to drain */ | |
c6d61269 AC |
1431 | if ((filp->f_flags&(O_NDELAY|O_NONBLOCK)) == 0) |
1432 | tty_wait_until_sent(tty, DIGI_CLOSE_TIMEOUT); | |
1da177e4 LT |
1433 | |
1434 | /* flush driver and line discipline buffers */ | |
f34d7a5b | 1435 | tty_driver_flush_buffer(tty); |
1da177e4 LT |
1436 | tty_ldisc_flush(tty); |
1437 | ||
1438 | if (port->serial->dev) { | |
1439 | /* wait for transmit idle */ | |
41ad427d | 1440 | if ((filp->f_flags&(O_NDELAY|O_NONBLOCK)) == 0) |
c6d61269 | 1441 | digi_transmit_idle(port, DIGI_CLOSE_TIMEOUT); |
1da177e4 | 1442 | /* drop DTR and RTS */ |
c6d61269 | 1443 | digi_set_modem_signals(port, 0, 0); |
1da177e4 LT |
1444 | |
1445 | /* disable input flow control */ | |
1446 | buf[0] = DIGI_CMD_SET_INPUT_FLOW_CONTROL; | |
1447 | buf[1] = priv->dp_port_num; | |
1448 | buf[2] = DIGI_DISABLE; | |
1449 | buf[3] = 0; | |
1450 | ||
1451 | /* disable output flow control */ | |
1452 | buf[4] = DIGI_CMD_SET_OUTPUT_FLOW_CONTROL; | |
1453 | buf[5] = priv->dp_port_num; | |
1454 | buf[6] = DIGI_DISABLE; | |
1455 | buf[7] = 0; | |
1456 | ||
1457 | /* disable reading modem signals automatically */ | |
1458 | buf[8] = DIGI_CMD_READ_INPUT_SIGNALS; | |
1459 | buf[9] = priv->dp_port_num; | |
1460 | buf[10] = DIGI_DISABLE; | |
1461 | buf[11] = 0; | |
1462 | ||
1463 | /* disable receive */ | |
1464 | buf[12] = DIGI_CMD_RECEIVE_ENABLE; | |
1465 | buf[13] = priv->dp_port_num; | |
1466 | buf[14] = DIGI_DISABLE; | |
1467 | buf[15] = 0; | |
1468 | ||
1469 | /* flush fifos */ | |
1470 | buf[16] = DIGI_CMD_IFLUSH_FIFO; | |
1471 | buf[17] = priv->dp_port_num; | |
1472 | buf[18] = DIGI_FLUSH_TX | DIGI_FLUSH_RX; | |
1473 | buf[19] = 0; | |
1474 | ||
41ad427d AC |
1475 | ret = digi_write_oob_command(port, buf, 20, 0); |
1476 | if (ret != 0) | |
c6d61269 | 1477 | dbg("digi_close: write oob failed, ret=%d", ret); |
1da177e4 LT |
1478 | |
1479 | /* wait for final commands on oob port to complete */ | |
41ad427d AC |
1480 | prepare_to_wait(&priv->dp_flush_wait, &wait, |
1481 | TASK_INTERRUPTIBLE); | |
1da177e4 LT |
1482 | schedule_timeout(DIGI_CLOSE_TIMEOUT); |
1483 | finish_wait(&priv->dp_flush_wait, &wait); | |
1484 | ||
1485 | /* shutdown any outstanding bulk writes */ | |
1486 | usb_kill_urb(port->write_urb); | |
1487 | } | |
1da177e4 | 1488 | tty->closing = 0; |
1da177e4 | 1489 | exit: |
0915f490 | 1490 | spin_lock_irq(&priv->dp_port_lock); |
1da177e4 LT |
1491 | priv->dp_write_urb_in_use = 0; |
1492 | priv->dp_in_close = 0; | |
c6d61269 | 1493 | wake_up_interruptible(&priv->dp_close_wait); |
0915f490 ON |
1494 | spin_unlock_irq(&priv->dp_port_lock); |
1495 | mutex_unlock(&port->serial->disc_mutex); | |
c6d61269 | 1496 | dbg("digi_close: done"); |
1da177e4 LT |
1497 | } |
1498 | ||
1499 | ||
1500 | /* | |
41ad427d AC |
1501 | * Digi Startup Device |
1502 | * | |
1503 | * Starts reads on all ports. Must be called AFTER startup, with | |
1504 | * urbs initialized. Returns 0 if successful, non-zero error otherwise. | |
1505 | */ | |
1da177e4 | 1506 | |
c6d61269 | 1507 | static int digi_startup_device(struct usb_serial *serial) |
1da177e4 | 1508 | { |
41ad427d | 1509 | int i, ret = 0; |
1da177e4 LT |
1510 | struct digi_serial *serial_priv = usb_get_serial_data(serial); |
1511 | struct usb_serial_port *port; | |
1512 | ||
1da177e4 | 1513 | /* be sure this happens exactly once */ |
c6d61269 AC |
1514 | spin_lock(&serial_priv->ds_serial_lock); |
1515 | if (serial_priv->ds_device_started) { | |
1516 | spin_unlock(&serial_priv->ds_serial_lock); | |
1517 | return 0; | |
1da177e4 LT |
1518 | } |
1519 | serial_priv->ds_device_started = 1; | |
c6d61269 | 1520 | spin_unlock(&serial_priv->ds_serial_lock); |
1da177e4 LT |
1521 | |
1522 | /* start reading from each bulk in endpoint for the device */ | |
1523 | /* set USB_DISABLE_SPD flag for write bulk urbs */ | |
c6d61269 | 1524 | for (i = 0; i < serial->type->num_ports + 1; i++) { |
1da177e4 | 1525 | port = serial->port[i]; |
1da177e4 | 1526 | port->write_urb->dev = port->serial->dev; |
41ad427d AC |
1527 | ret = usb_submit_urb(port->read_urb, GFP_KERNEL); |
1528 | if (ret != 0) { | |
194343d9 GKH |
1529 | dev_err(&port->dev, |
1530 | "%s: usb_submit_urb failed, ret=%d, port=%d\n", | |
1531 | __func__, ret, i); | |
1da177e4 LT |
1532 | break; |
1533 | } | |
1da177e4 | 1534 | } |
c6d61269 | 1535 | return ret; |
1da177e4 LT |
1536 | } |
1537 | ||
1538 | ||
c6d61269 | 1539 | static int digi_startup(struct usb_serial *serial) |
1da177e4 LT |
1540 | { |
1541 | ||
1542 | int i; | |
1543 | struct digi_port *priv; | |
1544 | struct digi_serial *serial_priv; | |
1545 | ||
c6d61269 | 1546 | dbg("digi_startup: TOP"); |
1da177e4 LT |
1547 | |
1548 | /* allocate the private data structures for all ports */ | |
1549 | /* number of regular ports + 1 for the out-of-band port */ | |
41ad427d | 1550 | for (i = 0; i < serial->type->num_ports + 1; i++) { |
1da177e4 | 1551 | /* allocate port private structure */ |
c6d61269 AC |
1552 | priv = kmalloc(sizeof(struct digi_port), GFP_KERNEL); |
1553 | if (priv == NULL) { | |
1554 | while (--i >= 0) | |
1555 | kfree(usb_get_serial_port_data(serial->port[i])); | |
1556 | return 1; /* error */ | |
1da177e4 LT |
1557 | } |
1558 | ||
1559 | /* initialize port private structure */ | |
c6d61269 | 1560 | spin_lock_init(&priv->dp_port_lock); |
1da177e4 LT |
1561 | priv->dp_port_num = i; |
1562 | priv->dp_out_buf_len = 0; | |
1da177e4 LT |
1563 | priv->dp_write_urb_in_use = 0; |
1564 | priv->dp_modem_signals = 0; | |
c6d61269 | 1565 | init_waitqueue_head(&priv->dp_modem_change_wait); |
1da177e4 | 1566 | priv->dp_transmit_idle = 0; |
c6d61269 | 1567 | init_waitqueue_head(&priv->dp_transmit_idle_wait); |
1da177e4 LT |
1568 | priv->dp_throttled = 0; |
1569 | priv->dp_throttle_restart = 0; | |
c6d61269 | 1570 | init_waitqueue_head(&priv->dp_flush_wait); |
1da177e4 | 1571 | priv->dp_in_close = 0; |
c6d61269 | 1572 | init_waitqueue_head(&priv->dp_close_wait); |
c4028958 DH |
1573 | INIT_WORK(&priv->dp_wakeup_work, digi_wakeup_write_lock); |
1574 | priv->dp_port = serial->port[i]; | |
1da177e4 | 1575 | /* initialize write wait queue for this port */ |
c6d61269 | 1576 | init_waitqueue_head(&serial->port[i]->write_wait); |
1da177e4 LT |
1577 | |
1578 | usb_set_serial_port_data(serial->port[i], priv); | |
1579 | } | |
1580 | ||
1581 | /* allocate serial private structure */ | |
c6d61269 AC |
1582 | serial_priv = kmalloc(sizeof(struct digi_serial), GFP_KERNEL); |
1583 | if (serial_priv == NULL) { | |
1584 | for (i = 0; i < serial->type->num_ports + 1; i++) | |
1585 | kfree(usb_get_serial_port_data(serial->port[i])); | |
1586 | return 1; /* error */ | |
1da177e4 LT |
1587 | } |
1588 | ||
1589 | /* initialize serial private structure */ | |
c6d61269 | 1590 | spin_lock_init(&serial_priv->ds_serial_lock); |
1da177e4 LT |
1591 | serial_priv->ds_oob_port_num = serial->type->num_ports; |
1592 | serial_priv->ds_oob_port = serial->port[serial_priv->ds_oob_port_num]; | |
1593 | serial_priv->ds_device_started = 0; | |
1594 | usb_set_serial_data(serial, serial_priv); | |
1595 | ||
c6d61269 | 1596 | return 0; |
1da177e4 LT |
1597 | } |
1598 | ||
1599 | ||
c6d61269 | 1600 | static void digi_shutdown(struct usb_serial *serial) |
1da177e4 | 1601 | { |
1da177e4 | 1602 | int i; |
c6d61269 | 1603 | dbg("digi_shutdown: TOP, in_interrupt()=%ld", in_interrupt()); |
1da177e4 LT |
1604 | |
1605 | /* stop reads and writes on all ports */ | |
c6d61269 | 1606 | for (i = 0; i < serial->type->num_ports + 1; i++) { |
1da177e4 LT |
1607 | usb_kill_urb(serial->port[i]->read_urb); |
1608 | usb_kill_urb(serial->port[i]->write_urb); | |
1609 | } | |
1610 | ||
1611 | /* free the private data structures for all ports */ | |
1612 | /* number of regular ports + 1 for the out-of-band port */ | |
41ad427d | 1613 | for (i = 0; i < serial->type->num_ports + 1; i++) |
c6d61269 AC |
1614 | kfree(usb_get_serial_port_data(serial->port[i])); |
1615 | kfree(usb_get_serial_data(serial)); | |
1da177e4 LT |
1616 | } |
1617 | ||
1618 | ||
c6d61269 | 1619 | static void digi_read_bulk_callback(struct urb *urb) |
1da177e4 | 1620 | { |
cdc97792 | 1621 | struct usb_serial_port *port = urb->context; |
1da177e4 LT |
1622 | struct digi_port *priv; |
1623 | struct digi_serial *serial_priv; | |
1624 | int ret; | |
85d75107 | 1625 | int status = urb->status; |
1da177e4 | 1626 | |
c6d61269 | 1627 | dbg("digi_read_bulk_callback: TOP"); |
1da177e4 LT |
1628 | |
1629 | /* port sanity check, do not resubmit if port is not valid */ | |
194343d9 GKH |
1630 | if (port == NULL) |
1631 | return; | |
1632 | priv = usb_get_serial_port_data(port); | |
1633 | if (priv == NULL) { | |
1634 | dev_err(&port->dev, "%s: port->private is NULL, status=%d\n", | |
1635 | __func__, status); | |
1da177e4 LT |
1636 | return; |
1637 | } | |
c6d61269 | 1638 | if (port->serial == NULL || |
41ad427d | 1639 | (serial_priv = usb_get_serial_data(port->serial)) == NULL) { |
194343d9 GKH |
1640 | dev_err(&port->dev, "%s: serial is bad or serial->private " |
1641 | "is NULL, status=%d\n", __func__, status); | |
1da177e4 LT |
1642 | return; |
1643 | } | |
1644 | ||
1645 | /* do not resubmit urb if it has any status error */ | |
85d75107 | 1646 | if (status) { |
194343d9 GKH |
1647 | dev_err(&port->dev, |
1648 | "%s: nonzero read bulk status: status=%d, port=%d\n", | |
1649 | __func__, status, priv->dp_port_num); | |
1da177e4 LT |
1650 | return; |
1651 | } | |
1652 | ||
1653 | /* handle oob or inb callback, do not resubmit if error */ | |
c6d61269 AC |
1654 | if (priv->dp_port_num == serial_priv->ds_oob_port_num) { |
1655 | if (digi_read_oob_callback(urb) != 0) | |
1da177e4 LT |
1656 | return; |
1657 | } else { | |
c6d61269 | 1658 | if (digi_read_inb_callback(urb) != 0) |
1da177e4 LT |
1659 | return; |
1660 | } | |
1661 | ||
1662 | /* continue read */ | |
1663 | urb->dev = port->serial->dev; | |
41ad427d AC |
1664 | ret = usb_submit_urb(urb, GFP_ATOMIC); |
1665 | if (ret != 0) { | |
194343d9 GKH |
1666 | dev_err(&port->dev, |
1667 | "%s: failed resubmitting urb, ret=%d, port=%d\n", | |
1668 | __func__, ret, priv->dp_port_num); | |
1da177e4 LT |
1669 | } |
1670 | ||
1671 | } | |
1672 | ||
41ad427d AC |
1673 | /* |
1674 | * Digi Read INB Callback | |
1675 | * | |
1676 | * Digi Read INB Callback handles reads on the in band ports, sending | |
1677 | * the data on to the tty subsystem. When called we know port and | |
1678 | * port->private are not NULL and port->serial has been validated. | |
1679 | * It returns 0 if successful, 1 if successful but the port is | |
1680 | * throttled, and -1 if the sanity checks failed. | |
1681 | */ | |
1da177e4 | 1682 | |
c6d61269 | 1683 | static int digi_read_inb_callback(struct urb *urb) |
1da177e4 LT |
1684 | { |
1685 | ||
cdc97792 | 1686 | struct usb_serial_port *port = urb->context; |
4a90f09b | 1687 | struct tty_struct *tty; |
1da177e4 LT |
1688 | struct digi_port *priv = usb_get_serial_port_data(port); |
1689 | int opcode = ((unsigned char *)urb->transfer_buffer)[0]; | |
1690 | int len = ((unsigned char *)urb->transfer_buffer)[1]; | |
85d75107 | 1691 | int port_status = ((unsigned char *)urb->transfer_buffer)[2]; |
41ad427d AC |
1692 | unsigned char *data = ((unsigned char *)urb->transfer_buffer) + 3; |
1693 | int flag, throttled; | |
33f0f88f | 1694 | int i; |
85d75107 | 1695 | int status = urb->status; |
1da177e4 LT |
1696 | |
1697 | /* do not process callbacks on closed ports */ | |
1698 | /* but do continue the read chain */ | |
95da310e | 1699 | if (port->port.count == 0) |
c6d61269 | 1700 | return 0; |
1da177e4 LT |
1701 | |
1702 | /* short/multiple packet check */ | |
c6d61269 | 1703 | if (urb->actual_length != len + 2) { |
194343d9 GKH |
1704 | dev_err(&port->dev, "%s: INCOMPLETE OR MULTIPLE PACKET, " |
1705 | "urb->status=%d, port=%d, opcode=%d, len=%d, " | |
1706 | "actual_length=%d, status=%d\n", __func__, status, | |
1707 | priv->dp_port_num, opcode, len, urb->actual_length, | |
1708 | port_status); | |
c6d61269 | 1709 | return -1; |
1da177e4 LT |
1710 | } |
1711 | ||
4a90f09b | 1712 | tty = tty_port_tty_get(&port->port); |
c6d61269 | 1713 | spin_lock(&priv->dp_port_lock); |
1da177e4 LT |
1714 | |
1715 | /* check for throttle; if set, do not resubmit read urb */ | |
1716 | /* indicate the read chain needs to be restarted on unthrottle */ | |
1717 | throttled = priv->dp_throttled; | |
c6d61269 | 1718 | if (throttled) |
1da177e4 LT |
1719 | priv->dp_throttle_restart = 1; |
1720 | ||
1721 | /* receive data */ | |
c6d61269 | 1722 | if (opcode == DIGI_CMD_RECEIVE_DATA) { |
85d75107 | 1723 | /* get flag from port_status */ |
1da177e4 LT |
1724 | flag = 0; |
1725 | ||
1726 | /* overrun is special, not associated with a char */ | |
c6d61269 AC |
1727 | if (port_status & DIGI_OVERRUN_ERROR) |
1728 | tty_insert_flip_char(tty, 0, TTY_OVERRUN); | |
1da177e4 LT |
1729 | |
1730 | /* break takes precedence over parity, */ | |
1731 | /* which takes precedence over framing errors */ | |
c6d61269 | 1732 | if (port_status & DIGI_BREAK_ERROR) |
1da177e4 | 1733 | flag = TTY_BREAK; |
c6d61269 | 1734 | else if (port_status & DIGI_PARITY_ERROR) |
1da177e4 | 1735 | flag = TTY_PARITY; |
c6d61269 | 1736 | else if (port_status & DIGI_FRAMING_ERROR) |
1da177e4 | 1737 | flag = TTY_FRAME; |
1da177e4 | 1738 | |
85d75107 | 1739 | /* data length is len-1 (one byte of len is port_status) */ |
1da177e4 LT |
1740 | --len; |
1741 | ||
39892da4 | 1742 | len = tty_buffer_request_room(tty, len); |
c6d61269 | 1743 | if (len > 0) { |
39892da4 | 1744 | /* Hot path */ |
c6d61269 | 1745 | if (flag == TTY_NORMAL) |
39892da4 ON |
1746 | tty_insert_flip_string(tty, data, len); |
1747 | else { | |
41ad427d AC |
1748 | for (i = 0; i < len; i++) |
1749 | tty_insert_flip_char(tty, | |
1750 | data[i], flag); | |
1da177e4 | 1751 | } |
c6d61269 | 1752 | tty_flip_buffer_push(tty); |
1da177e4 | 1753 | } |
1da177e4 | 1754 | } |
c6d61269 | 1755 | spin_unlock(&priv->dp_port_lock); |
4a90f09b | 1756 | tty_kref_put(tty); |
1da177e4 | 1757 | |
c6d61269 | 1758 | if (opcode == DIGI_CMD_RECEIVE_DISABLE) |
441b62c1 | 1759 | dbg("%s: got RECEIVE_DISABLE", __func__); |
c6d61269 | 1760 | else if (opcode != DIGI_CMD_RECEIVE_DATA) |
441b62c1 | 1761 | dbg("%s: unknown opcode: %d", __func__, opcode); |
1da177e4 | 1762 | |
41ad427d | 1763 | return throttled ? 1 : 0; |
1da177e4 LT |
1764 | |
1765 | } | |
1766 | ||
1767 | ||
41ad427d AC |
1768 | /* |
1769 | * Digi Read OOB Callback | |
1770 | * | |
1771 | * Digi Read OOB Callback handles reads on the out of band port. | |
1772 | * When called we know port and port->private are not NULL and | |
1773 | * the port->serial is valid. It returns 0 if successful, and | |
1774 | * -1 if the sanity checks failed. | |
1775 | */ | |
1da177e4 | 1776 | |
c6d61269 | 1777 | static int digi_read_oob_callback(struct urb *urb) |
1da177e4 LT |
1778 | { |
1779 | ||
cdc97792 | 1780 | struct usb_serial_port *port = urb->context; |
1da177e4 | 1781 | struct usb_serial *serial = port->serial; |
4a90f09b | 1782 | struct tty_struct *tty; |
1da177e4 LT |
1783 | struct digi_port *priv = usb_get_serial_port_data(port); |
1784 | int opcode, line, status, val; | |
1785 | int i; | |
41ad427d | 1786 | unsigned int rts; |
1da177e4 | 1787 | |
c6d61269 AC |
1788 | dbg("digi_read_oob_callback: port=%d, len=%d", |
1789 | priv->dp_port_num, urb->actual_length); | |
1da177e4 LT |
1790 | |
1791 | /* handle each oob command */ | |
41ad427d | 1792 | for (i = 0; i < urb->actual_length - 3;) { |
1da177e4 LT |
1793 | opcode = ((unsigned char *)urb->transfer_buffer)[i++]; |
1794 | line = ((unsigned char *)urb->transfer_buffer)[i++]; | |
1795 | status = ((unsigned char *)urb->transfer_buffer)[i++]; | |
1796 | val = ((unsigned char *)urb->transfer_buffer)[i++]; | |
1797 | ||
c6d61269 AC |
1798 | dbg("digi_read_oob_callback: opcode=%d, line=%d, status=%d, val=%d", |
1799 | opcode, line, status, val); | |
1da177e4 | 1800 | |
c6d61269 | 1801 | if (status != 0 || line >= serial->type->num_ports) |
1da177e4 LT |
1802 | continue; |
1803 | ||
1804 | port = serial->port[line]; | |
1805 | ||
41ad427d AC |
1806 | priv = usb_get_serial_port_data(port); |
1807 | if (priv == NULL) | |
1da177e4 LT |
1808 | return -1; |
1809 | ||
4a90f09b | 1810 | tty = tty_port_tty_get(&port->port); |
41ad427d AC |
1811 | rts = 0; |
1812 | if (port->port.count) | |
4a90f09b AC |
1813 | rts = tty->termios->c_cflag & CRTSCTS; |
1814 | ||
c6d61269 AC |
1815 | if (opcode == DIGI_CMD_READ_INPUT_SIGNALS) { |
1816 | spin_lock(&priv->dp_port_lock); | |
1da177e4 | 1817 | /* convert from digi flags to termiox flags */ |
c6d61269 | 1818 | if (val & DIGI_READ_INPUT_SIGNALS_CTS) { |
1da177e4 LT |
1819 | priv->dp_modem_signals |= TIOCM_CTS; |
1820 | /* port must be open to use tty struct */ | |
41ad427d | 1821 | if (rts) { |
4a90f09b | 1822 | tty->hw_stopped = 0; |
c6d61269 | 1823 | digi_wakeup_write(port); |
1da177e4 LT |
1824 | } |
1825 | } else { | |
1826 | priv->dp_modem_signals &= ~TIOCM_CTS; | |
1827 | /* port must be open to use tty struct */ | |
41ad427d | 1828 | if (rts) |
4a90f09b | 1829 | tty->hw_stopped = 1; |
1da177e4 | 1830 | } |
c6d61269 | 1831 | if (val & DIGI_READ_INPUT_SIGNALS_DSR) |
1da177e4 LT |
1832 | priv->dp_modem_signals |= TIOCM_DSR; |
1833 | else | |
1834 | priv->dp_modem_signals &= ~TIOCM_DSR; | |
c6d61269 | 1835 | if (val & DIGI_READ_INPUT_SIGNALS_RI) |
1da177e4 LT |
1836 | priv->dp_modem_signals |= TIOCM_RI; |
1837 | else | |
1838 | priv->dp_modem_signals &= ~TIOCM_RI; | |
c6d61269 | 1839 | if (val & DIGI_READ_INPUT_SIGNALS_DCD) |
1da177e4 LT |
1840 | priv->dp_modem_signals |= TIOCM_CD; |
1841 | else | |
1842 | priv->dp_modem_signals &= ~TIOCM_CD; | |
1843 | ||
c6d61269 AC |
1844 | wake_up_interruptible(&priv->dp_modem_change_wait); |
1845 | spin_unlock(&priv->dp_port_lock); | |
1846 | } else if (opcode == DIGI_CMD_TRANSMIT_IDLE) { | |
1847 | spin_lock(&priv->dp_port_lock); | |
1da177e4 | 1848 | priv->dp_transmit_idle = 1; |
c6d61269 AC |
1849 | wake_up_interruptible(&priv->dp_transmit_idle_wait); |
1850 | spin_unlock(&priv->dp_port_lock); | |
1851 | } else if (opcode == DIGI_CMD_IFLUSH_FIFO) { | |
1852 | wake_up_interruptible(&priv->dp_flush_wait); | |
1da177e4 | 1853 | } |
4a90f09b | 1854 | tty_kref_put(tty); |
1da177e4 | 1855 | } |
c6d61269 | 1856 | return 0; |
1da177e4 LT |
1857 | |
1858 | } | |
1859 | ||
c6d61269 | 1860 | static int __init digi_init(void) |
1da177e4 LT |
1861 | { |
1862 | int retval; | |
1863 | retval = usb_serial_register(&digi_acceleport_2_device); | |
1864 | if (retval) | |
1865 | goto failed_acceleport_2_device; | |
1866 | retval = usb_serial_register(&digi_acceleport_4_device); | |
41ad427d | 1867 | if (retval) |
1da177e4 LT |
1868 | goto failed_acceleport_4_device; |
1869 | retval = usb_register(&digi_driver); | |
1870 | if (retval) | |
1871 | goto failed_usb_register; | |
c197a8db GKH |
1872 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" |
1873 | DRIVER_DESC "\n"); | |
1da177e4 LT |
1874 | return 0; |
1875 | failed_usb_register: | |
1876 | usb_serial_deregister(&digi_acceleport_4_device); | |
1877 | failed_acceleport_4_device: | |
1878 | usb_serial_deregister(&digi_acceleport_2_device); | |
1879 | failed_acceleport_2_device: | |
1880 | return retval; | |
1881 | } | |
1882 | ||
1da177e4 LT |
1883 | static void __exit digi_exit (void) |
1884 | { | |
c6d61269 AC |
1885 | usb_deregister(&digi_driver); |
1886 | usb_serial_deregister(&digi_acceleport_2_device); | |
1887 | usb_serial_deregister(&digi_acceleport_4_device); | |
1da177e4 LT |
1888 | } |
1889 | ||
1890 | ||
1891 | module_init(digi_init); | |
1892 | module_exit(digi_exit); | |
1893 | ||
1894 | ||
c6d61269 AC |
1895 | MODULE_AUTHOR(DRIVER_AUTHOR); |
1896 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 LT |
1897 | MODULE_LICENSE("GPL"); |
1898 | ||
1899 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
1900 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |