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Commit | Line | Data |
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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) | |
1da177e4 LT |
16 | */ |
17 | ||
1da177e4 LT |
18 | #include <linux/kernel.h> |
19 | #include <linux/errno.h> | |
20 | #include <linux/init.h> | |
21 | #include <linux/slab.h> | |
22 | #include <linux/tty.h> | |
23 | #include <linux/tty_driver.h> | |
24 | #include <linux/tty_flip.h> | |
25 | #include <linux/module.h> | |
26 | #include <linux/spinlock.h> | |
27 | #include <linux/workqueue.h> | |
41ad427d | 28 | #include <linux/uaccess.h> |
1da177e4 LT |
29 | #include <linux/usb.h> |
30 | #include <linux/wait.h> | |
a969888c | 31 | #include <linux/usb/serial.h> |
1da177e4 LT |
32 | |
33 | /* Defines */ | |
34 | ||
35 | /* | |
36 | * Version Information | |
37 | */ | |
38 | #define DRIVER_VERSION "v1.80.1.2" | |
39 | #define DRIVER_AUTHOR "Peter Berger <pberger@brimson.com>, Al Borchers <borchers@steinerpoint.com>" | |
40 | #define DRIVER_DESC "Digi AccelePort USB-2/USB-4 Serial Converter driver" | |
41 | ||
42 | /* port output buffer length -- must be <= transfer buffer length - 2 */ | |
43 | /* so we can be sure to send the full buffer in one urb */ | |
44 | #define DIGI_OUT_BUF_SIZE 8 | |
45 | ||
46 | /* port input buffer length -- must be >= transfer buffer length - 3 */ | |
47 | /* so we can be sure to hold at least one full buffer from one urb */ | |
48 | #define DIGI_IN_BUF_SIZE 64 | |
49 | ||
50 | /* retry timeout while sleeping */ | |
51 | #define DIGI_RETRY_TIMEOUT (HZ/10) | |
52 | ||
53 | /* timeout while waiting for tty output to drain in close */ | |
54 | /* this delay is used twice in close, so the total delay could */ | |
55 | /* be twice this value */ | |
56 | #define DIGI_CLOSE_TIMEOUT (5*HZ) | |
57 | ||
58 | ||
59 | /* AccelePort USB Defines */ | |
60 | ||
61 | /* ids */ | |
62 | #define DIGI_VENDOR_ID 0x05c5 | |
63 | #define DIGI_2_ID 0x0002 /* USB-2 */ | |
64 | #define DIGI_4_ID 0x0004 /* USB-4 */ | |
65 | ||
66 | /* commands | |
67 | * "INB": can be used on the in-band endpoint | |
68 | * "OOB": can be used on the out-of-band endpoint | |
69 | */ | |
70 | #define DIGI_CMD_SET_BAUD_RATE 0 /* INB, OOB */ | |
71 | #define DIGI_CMD_SET_WORD_SIZE 1 /* INB, OOB */ | |
72 | #define DIGI_CMD_SET_PARITY 2 /* INB, OOB */ | |
73 | #define DIGI_CMD_SET_STOP_BITS 3 /* INB, OOB */ | |
74 | #define DIGI_CMD_SET_INPUT_FLOW_CONTROL 4 /* INB, OOB */ | |
75 | #define DIGI_CMD_SET_OUTPUT_FLOW_CONTROL 5 /* INB, OOB */ | |
76 | #define DIGI_CMD_SET_DTR_SIGNAL 6 /* INB, OOB */ | |
77 | #define DIGI_CMD_SET_RTS_SIGNAL 7 /* INB, OOB */ | |
78 | #define DIGI_CMD_READ_INPUT_SIGNALS 8 /* OOB */ | |
79 | #define DIGI_CMD_IFLUSH_FIFO 9 /* OOB */ | |
80 | #define DIGI_CMD_RECEIVE_ENABLE 10 /* INB, OOB */ | |
81 | #define DIGI_CMD_BREAK_CONTROL 11 /* INB, OOB */ | |
82 | #define DIGI_CMD_LOCAL_LOOPBACK 12 /* INB, OOB */ | |
83 | #define DIGI_CMD_TRANSMIT_IDLE 13 /* INB, OOB */ | |
84 | #define DIGI_CMD_READ_UART_REGISTER 14 /* OOB */ | |
85 | #define DIGI_CMD_WRITE_UART_REGISTER 15 /* INB, OOB */ | |
86 | #define DIGI_CMD_AND_UART_REGISTER 16 /* INB, OOB */ | |
87 | #define DIGI_CMD_OR_UART_REGISTER 17 /* INB, OOB */ | |
88 | #define DIGI_CMD_SEND_DATA 18 /* INB */ | |
89 | #define DIGI_CMD_RECEIVE_DATA 19 /* INB */ | |
90 | #define DIGI_CMD_RECEIVE_DISABLE 20 /* INB */ | |
91 | #define DIGI_CMD_GET_PORT_TYPE 21 /* OOB */ | |
92 | ||
93 | /* baud rates */ | |
94 | #define DIGI_BAUD_50 0 | |
95 | #define DIGI_BAUD_75 1 | |
96 | #define DIGI_BAUD_110 2 | |
97 | #define DIGI_BAUD_150 3 | |
98 | #define DIGI_BAUD_200 4 | |
99 | #define DIGI_BAUD_300 5 | |
100 | #define DIGI_BAUD_600 6 | |
101 | #define DIGI_BAUD_1200 7 | |
102 | #define DIGI_BAUD_1800 8 | |
103 | #define DIGI_BAUD_2400 9 | |
104 | #define DIGI_BAUD_4800 10 | |
105 | #define DIGI_BAUD_7200 11 | |
106 | #define DIGI_BAUD_9600 12 | |
107 | #define DIGI_BAUD_14400 13 | |
108 | #define DIGI_BAUD_19200 14 | |
109 | #define DIGI_BAUD_28800 15 | |
110 | #define DIGI_BAUD_38400 16 | |
111 | #define DIGI_BAUD_57600 17 | |
112 | #define DIGI_BAUD_76800 18 | |
113 | #define DIGI_BAUD_115200 19 | |
114 | #define DIGI_BAUD_153600 20 | |
115 | #define DIGI_BAUD_230400 21 | |
116 | #define DIGI_BAUD_460800 22 | |
117 | ||
118 | /* arguments */ | |
119 | #define DIGI_WORD_SIZE_5 0 | |
120 | #define DIGI_WORD_SIZE_6 1 | |
121 | #define DIGI_WORD_SIZE_7 2 | |
122 | #define DIGI_WORD_SIZE_8 3 | |
123 | ||
124 | #define DIGI_PARITY_NONE 0 | |
125 | #define DIGI_PARITY_ODD 1 | |
126 | #define DIGI_PARITY_EVEN 2 | |
127 | #define DIGI_PARITY_MARK 3 | |
128 | #define DIGI_PARITY_SPACE 4 | |
129 | ||
130 | #define DIGI_STOP_BITS_1 0 | |
131 | #define DIGI_STOP_BITS_2 1 | |
132 | ||
133 | #define DIGI_INPUT_FLOW_CONTROL_XON_XOFF 1 | |
134 | #define DIGI_INPUT_FLOW_CONTROL_RTS 2 | |
135 | #define DIGI_INPUT_FLOW_CONTROL_DTR 4 | |
136 | ||
137 | #define DIGI_OUTPUT_FLOW_CONTROL_XON_XOFF 1 | |
138 | #define DIGI_OUTPUT_FLOW_CONTROL_CTS 2 | |
139 | #define DIGI_OUTPUT_FLOW_CONTROL_DSR 4 | |
140 | ||
141 | #define DIGI_DTR_INACTIVE 0 | |
142 | #define DIGI_DTR_ACTIVE 1 | |
143 | #define DIGI_DTR_INPUT_FLOW_CONTROL 2 | |
144 | ||
145 | #define DIGI_RTS_INACTIVE 0 | |
146 | #define DIGI_RTS_ACTIVE 1 | |
147 | #define DIGI_RTS_INPUT_FLOW_CONTROL 2 | |
148 | #define DIGI_RTS_TOGGLE 3 | |
149 | ||
150 | #define DIGI_FLUSH_TX 1 | |
151 | #define DIGI_FLUSH_RX 2 | |
152 | #define DIGI_RESUME_TX 4 /* clears xoff condition */ | |
153 | ||
154 | #define DIGI_TRANSMIT_NOT_IDLE 0 | |
155 | #define DIGI_TRANSMIT_IDLE 1 | |
156 | ||
157 | #define DIGI_DISABLE 0 | |
158 | #define DIGI_ENABLE 1 | |
159 | ||
160 | #define DIGI_DEASSERT 0 | |
161 | #define DIGI_ASSERT 1 | |
162 | ||
163 | /* in band status codes */ | |
164 | #define DIGI_OVERRUN_ERROR 4 | |
165 | #define DIGI_PARITY_ERROR 8 | |
166 | #define DIGI_FRAMING_ERROR 16 | |
167 | #define DIGI_BREAK_ERROR 32 | |
168 | ||
169 | /* out of band status */ | |
170 | #define DIGI_NO_ERROR 0 | |
171 | #define DIGI_BAD_FIRST_PARAMETER 1 | |
172 | #define DIGI_BAD_SECOND_PARAMETER 2 | |
173 | #define DIGI_INVALID_LINE 3 | |
174 | #define DIGI_INVALID_OPCODE 4 | |
175 | ||
176 | /* input signals */ | |
177 | #define DIGI_READ_INPUT_SIGNALS_SLOT 1 | |
178 | #define DIGI_READ_INPUT_SIGNALS_ERR 2 | |
179 | #define DIGI_READ_INPUT_SIGNALS_BUSY 4 | |
180 | #define DIGI_READ_INPUT_SIGNALS_PE 8 | |
181 | #define DIGI_READ_INPUT_SIGNALS_CTS 16 | |
182 | #define DIGI_READ_INPUT_SIGNALS_DSR 32 | |
183 | #define DIGI_READ_INPUT_SIGNALS_RI 64 | |
184 | #define DIGI_READ_INPUT_SIGNALS_DCD 128 | |
185 | ||
186 | ||
187 | /* Structures */ | |
188 | ||
189 | struct digi_serial { | |
190 | spinlock_t ds_serial_lock; | |
191 | struct usb_serial_port *ds_oob_port; /* out-of-band port */ | |
192 | int ds_oob_port_num; /* index of out-of-band port */ | |
193 | int ds_device_started; | |
194 | }; | |
195 | ||
196 | struct digi_port { | |
197 | spinlock_t dp_port_lock; | |
198 | int dp_port_num; | |
199 | int dp_out_buf_len; | |
200 | unsigned char dp_out_buf[DIGI_OUT_BUF_SIZE]; | |
1da177e4 LT |
201 | int dp_write_urb_in_use; |
202 | unsigned int dp_modem_signals; | |
203 | wait_queue_head_t dp_modem_change_wait; | |
204 | int dp_transmit_idle; | |
205 | wait_queue_head_t dp_transmit_idle_wait; | |
206 | int dp_throttled; | |
207 | int dp_throttle_restart; | |
208 | wait_queue_head_t dp_flush_wait; | |
1da177e4 LT |
209 | wait_queue_head_t dp_close_wait; /* wait queue for close */ |
210 | struct work_struct dp_wakeup_work; | |
c4028958 | 211 | struct usb_serial_port *dp_port; |
1da177e4 LT |
212 | }; |
213 | ||
214 | ||
215 | /* Local Function Declarations */ | |
216 | ||
c6d61269 | 217 | static void digi_wakeup_write(struct usb_serial_port *port); |
c4028958 | 218 | static void digi_wakeup_write_lock(struct work_struct *work); |
c6d61269 AC |
219 | static int digi_write_oob_command(struct usb_serial_port *port, |
220 | unsigned char *buf, int count, int interruptible); | |
221 | static int digi_write_inb_command(struct usb_serial_port *port, | |
222 | unsigned char *buf, int count, unsigned long timeout); | |
223 | static int digi_set_modem_signals(struct usb_serial_port *port, | |
224 | unsigned int modem_signals, int interruptible); | |
225 | static int digi_transmit_idle(struct usb_serial_port *port, | |
226 | unsigned long timeout); | |
41ad427d AC |
227 | static void digi_rx_throttle(struct tty_struct *tty); |
228 | static void digi_rx_unthrottle(struct tty_struct *tty); | |
95da310e AC |
229 | static void digi_set_termios(struct tty_struct *tty, |
230 | struct usb_serial_port *port, struct ktermios *old_termios); | |
231 | static void digi_break_ctl(struct tty_struct *tty, int break_state); | |
60b33c13 | 232 | static int digi_tiocmget(struct tty_struct *tty); |
20b9d177 AC |
233 | static int digi_tiocmset(struct tty_struct *tty, unsigned int set, |
234 | unsigned int clear); | |
95da310e | 235 | static int digi_write(struct tty_struct *tty, struct usb_serial_port *port, |
20b9d177 | 236 | const unsigned char *buf, int count); |
c6d61269 | 237 | static void digi_write_bulk_callback(struct urb *urb); |
95da310e AC |
238 | static int digi_write_room(struct tty_struct *tty); |
239 | static int digi_chars_in_buffer(struct tty_struct *tty); | |
a509a7e4 | 240 | static int digi_open(struct tty_struct *tty, struct usb_serial_port *port); |
335f8514 | 241 | static void digi_close(struct usb_serial_port *port); |
335f8514 | 242 | static void digi_dtr_rts(struct usb_serial_port *port, int on); |
c6d61269 AC |
243 | static int digi_startup_device(struct usb_serial *serial); |
244 | static int digi_startup(struct usb_serial *serial); | |
f9c99bb8 AS |
245 | static void digi_disconnect(struct usb_serial *serial); |
246 | static void digi_release(struct usb_serial *serial); | |
c6d61269 AC |
247 | static void digi_read_bulk_callback(struct urb *urb); |
248 | static int digi_read_inb_callback(struct urb *urb); | |
249 | static int digi_read_oob_callback(struct urb *urb); | |
1da177e4 LT |
250 | |
251 | ||
252 | /* Statics */ | |
253 | ||
90ab5ee9 | 254 | static bool debug; |
1da177e4 | 255 | |
7d40d7e8 | 256 | static const struct usb_device_id id_table_combined[] = { |
1da177e4 LT |
257 | { USB_DEVICE(DIGI_VENDOR_ID, DIGI_2_ID) }, |
258 | { USB_DEVICE(DIGI_VENDOR_ID, DIGI_4_ID) }, | |
259 | { } /* Terminating entry */ | |
260 | }; | |
261 | ||
7d40d7e8 | 262 | static const struct usb_device_id id_table_2[] = { |
1da177e4 LT |
263 | { USB_DEVICE(DIGI_VENDOR_ID, DIGI_2_ID) }, |
264 | { } /* Terminating entry */ | |
265 | }; | |
266 | ||
7d40d7e8 | 267 | static const struct usb_device_id id_table_4[] = { |
1da177e4 LT |
268 | { USB_DEVICE(DIGI_VENDOR_ID, DIGI_4_ID) }, |
269 | { } /* Terminating entry */ | |
270 | }; | |
271 | ||
41ad427d | 272 | MODULE_DEVICE_TABLE(usb, id_table_combined); |
1da177e4 LT |
273 | |
274 | static struct usb_driver digi_driver = { | |
1da177e4 LT |
275 | .name = "digi_acceleport", |
276 | .probe = usb_serial_probe, | |
277 | .disconnect = usb_serial_disconnect, | |
278 | .id_table = id_table_combined, | |
ba9dc657 | 279 | .no_dynamic_id = 1, |
1da177e4 LT |
280 | }; |
281 | ||
282 | ||
283 | /* device info needed for the Digi serial converter */ | |
284 | ||
ea65370d | 285 | static struct usb_serial_driver digi_acceleport_2_device = { |
18fcac35 | 286 | .driver = { |
269bda1c GKH |
287 | .owner = THIS_MODULE, |
288 | .name = "digi_2", | |
18fcac35 | 289 | }, |
269bda1c | 290 | .description = "Digi 2 port USB adapter", |
d9b1b787 | 291 | .usb_driver = &digi_driver, |
1da177e4 | 292 | .id_table = id_table_2, |
1da177e4 LT |
293 | .num_ports = 3, |
294 | .open = digi_open, | |
295 | .close = digi_close, | |
335f8514 | 296 | .dtr_rts = digi_dtr_rts, |
1da177e4 LT |
297 | .write = digi_write, |
298 | .write_room = digi_write_room, | |
299 | .write_bulk_callback = digi_write_bulk_callback, | |
300 | .read_bulk_callback = digi_read_bulk_callback, | |
301 | .chars_in_buffer = digi_chars_in_buffer, | |
302 | .throttle = digi_rx_throttle, | |
303 | .unthrottle = digi_rx_unthrottle, | |
1da177e4 LT |
304 | .set_termios = digi_set_termios, |
305 | .break_ctl = digi_break_ctl, | |
306 | .tiocmget = digi_tiocmget, | |
307 | .tiocmset = digi_tiocmset, | |
308 | .attach = digi_startup, | |
f9c99bb8 AS |
309 | .disconnect = digi_disconnect, |
310 | .release = digi_release, | |
1da177e4 LT |
311 | }; |
312 | ||
ea65370d | 313 | static struct usb_serial_driver digi_acceleport_4_device = { |
18fcac35 | 314 | .driver = { |
269bda1c GKH |
315 | .owner = THIS_MODULE, |
316 | .name = "digi_4", | |
18fcac35 | 317 | }, |
269bda1c | 318 | .description = "Digi 4 port USB adapter", |
d9b1b787 | 319 | .usb_driver = &digi_driver, |
1da177e4 | 320 | .id_table = id_table_4, |
1da177e4 LT |
321 | .num_ports = 4, |
322 | .open = digi_open, | |
323 | .close = digi_close, | |
324 | .write = digi_write, | |
325 | .write_room = digi_write_room, | |
326 | .write_bulk_callback = digi_write_bulk_callback, | |
327 | .read_bulk_callback = digi_read_bulk_callback, | |
328 | .chars_in_buffer = digi_chars_in_buffer, | |
329 | .throttle = digi_rx_throttle, | |
330 | .unthrottle = digi_rx_unthrottle, | |
1da177e4 LT |
331 | .set_termios = digi_set_termios, |
332 | .break_ctl = digi_break_ctl, | |
333 | .tiocmget = digi_tiocmget, | |
334 | .tiocmset = digi_tiocmset, | |
335 | .attach = digi_startup, | |
f9c99bb8 AS |
336 | .disconnect = digi_disconnect, |
337 | .release = digi_release, | |
1da177e4 LT |
338 | }; |
339 | ||
340 | ||
341 | /* Functions */ | |
342 | ||
343 | /* | |
41ad427d AC |
344 | * Cond Wait Interruptible Timeout Irqrestore |
345 | * | |
346 | * Do spin_unlock_irqrestore and interruptible_sleep_on_timeout | |
347 | * so that wake ups are not lost if they occur between the unlock | |
348 | * and the sleep. In other words, spin_unlock_irqrestore and | |
349 | * interruptible_sleep_on_timeout are "atomic" with respect to | |
350 | * wake ups. This is used to implement condition variables. | |
351 | * | |
352 | * interruptible_sleep_on_timeout is deprecated and has been replaced | |
353 | * with the equivalent code. | |
354 | */ | |
1da177e4 | 355 | |
c6d61269 | 356 | static long cond_wait_interruptible_timeout_irqrestore( |
1da177e4 | 357 | wait_queue_head_t *q, long timeout, |
c6d61269 | 358 | spinlock_t *lock, unsigned long flags) |
5a33956a | 359 | __releases(lock) |
1da177e4 LT |
360 | { |
361 | DEFINE_WAIT(wait); | |
362 | ||
45f23f18 | 363 | prepare_to_wait(q, &wait, TASK_INTERRUPTIBLE); |
1da177e4 LT |
364 | spin_unlock_irqrestore(lock, flags); |
365 | timeout = schedule_timeout(timeout); | |
366 | finish_wait(q, &wait); | |
367 | ||
368 | return timeout; | |
1da177e4 LT |
369 | } |
370 | ||
371 | ||
372 | /* | |
41ad427d AC |
373 | * Digi Wakeup Write |
374 | * | |
375 | * Wake up port, line discipline, and tty processes sleeping | |
376 | * on writes. | |
377 | */ | |
1da177e4 | 378 | |
c4028958 | 379 | static void digi_wakeup_write_lock(struct work_struct *work) |
1da177e4 | 380 | { |
41ad427d AC |
381 | struct digi_port *priv = |
382 | container_of(work, struct digi_port, dp_wakeup_work); | |
c4028958 | 383 | struct usb_serial_port *port = priv->dp_port; |
1da177e4 | 384 | unsigned long flags; |
1da177e4 | 385 | |
c6d61269 AC |
386 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
387 | digi_wakeup_write(port); | |
388 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); | |
1da177e4 LT |
389 | } |
390 | ||
c6d61269 | 391 | static void digi_wakeup_write(struct usb_serial_port *port) |
1da177e4 | 392 | { |
4a90f09b | 393 | struct tty_struct *tty = tty_port_tty_get(&port->port); |
4287341d AC |
394 | if (tty) { |
395 | tty_wakeup(tty); | |
396 | tty_kref_put(tty); | |
397 | } | |
1da177e4 LT |
398 | } |
399 | ||
400 | ||
401 | /* | |
41ad427d AC |
402 | * Digi Write OOB Command |
403 | * | |
404 | * Write commands on the out of band port. Commands are 4 | |
405 | * bytes each, multiple commands can be sent at once, and | |
406 | * no command will be split across USB packets. Returns 0 | |
407 | * if successful, -EINTR if interrupted while sleeping and | |
408 | * the interruptible flag is true, or a negative error | |
409 | * returned by usb_submit_urb. | |
410 | */ | |
1da177e4 | 411 | |
c6d61269 AC |
412 | static int digi_write_oob_command(struct usb_serial_port *port, |
413 | unsigned char *buf, int count, int interruptible) | |
1da177e4 LT |
414 | { |
415 | ||
416 | int ret = 0; | |
417 | int len; | |
418 | struct usb_serial_port *oob_port = (struct usb_serial_port *)((struct digi_serial *)(usb_get_serial_data(port->serial)))->ds_oob_port; | |
419 | struct digi_port *oob_priv = usb_get_serial_port_data(oob_port); | |
420 | unsigned long flags = 0; | |
421 | ||
c6d61269 | 422 | dbg("digi_write_oob_command: TOP: port=%d, count=%d", oob_priv->dp_port_num, count); |
1da177e4 | 423 | |
c6d61269 | 424 | spin_lock_irqsave(&oob_priv->dp_port_lock, flags); |
41ad427d | 425 | while (count > 0) { |
50de36f7 | 426 | while (oob_priv->dp_write_urb_in_use) { |
1da177e4 LT |
427 | cond_wait_interruptible_timeout_irqrestore( |
428 | &oob_port->write_wait, DIGI_RETRY_TIMEOUT, | |
c6d61269 AC |
429 | &oob_priv->dp_port_lock, flags); |
430 | if (interruptible && signal_pending(current)) | |
431 | return -EINTR; | |
432 | spin_lock_irqsave(&oob_priv->dp_port_lock, flags); | |
1da177e4 LT |
433 | } |
434 | ||
435 | /* len must be a multiple of 4, so commands are not split */ | |
c6d61269 AC |
436 | len = min(count, oob_port->bulk_out_size); |
437 | if (len > 4) | |
1da177e4 | 438 | len &= ~3; |
c6d61269 | 439 | memcpy(oob_port->write_urb->transfer_buffer, buf, len); |
1da177e4 | 440 | oob_port->write_urb->transfer_buffer_length = len; |
41ad427d AC |
441 | ret = usb_submit_urb(oob_port->write_urb, GFP_ATOMIC); |
442 | if (ret == 0) { | |
1da177e4 LT |
443 | oob_priv->dp_write_urb_in_use = 1; |
444 | count -= len; | |
445 | buf += len; | |
446 | } | |
1da177e4 | 447 | } |
c6d61269 AC |
448 | spin_unlock_irqrestore(&oob_priv->dp_port_lock, flags); |
449 | if (ret) | |
194343d9 GKH |
450 | dev_err(&port->dev, "%s: usb_submit_urb failed, ret=%d\n", |
451 | __func__, ret); | |
c6d61269 | 452 | return ret; |
1da177e4 LT |
453 | |
454 | } | |
455 | ||
456 | ||
457 | /* | |
41ad427d AC |
458 | * Digi Write In Band Command |
459 | * | |
460 | * Write commands on the given port. Commands are 4 | |
461 | * bytes each, multiple commands can be sent at once, and | |
462 | * no command will be split across USB packets. If timeout | |
463 | * is non-zero, write in band command will return after | |
464 | * waiting unsuccessfully for the URB status to clear for | |
465 | * timeout ticks. Returns 0 if successful, or a negative | |
466 | * error returned by digi_write. | |
467 | */ | |
1da177e4 | 468 | |
c6d61269 AC |
469 | static int digi_write_inb_command(struct usb_serial_port *port, |
470 | unsigned char *buf, int count, unsigned long timeout) | |
1da177e4 | 471 | { |
1da177e4 LT |
472 | int ret = 0; |
473 | int len; | |
474 | struct digi_port *priv = usb_get_serial_port_data(port); | |
475 | unsigned char *data = port->write_urb->transfer_buffer; | |
476 | unsigned long flags = 0; | |
477 | ||
c6d61269 AC |
478 | dbg("digi_write_inb_command: TOP: port=%d, count=%d", |
479 | priv->dp_port_num, count); | |
1da177e4 | 480 | |
c6d61269 | 481 | if (timeout) |
1da177e4 LT |
482 | timeout += jiffies; |
483 | else | |
484 | timeout = ULONG_MAX; | |
485 | ||
c6d61269 | 486 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
41ad427d | 487 | while (count > 0 && ret == 0) { |
50de36f7 GKH |
488 | while (priv->dp_write_urb_in_use && |
489 | time_before(jiffies, timeout)) { | |
1da177e4 LT |
490 | cond_wait_interruptible_timeout_irqrestore( |
491 | &port->write_wait, DIGI_RETRY_TIMEOUT, | |
c6d61269 AC |
492 | &priv->dp_port_lock, flags); |
493 | if (signal_pending(current)) | |
494 | return -EINTR; | |
495 | spin_lock_irqsave(&priv->dp_port_lock, flags); | |
1da177e4 LT |
496 | } |
497 | ||
498 | /* len must be a multiple of 4 and small enough to */ | |
499 | /* guarantee the write will send buffered data first, */ | |
500 | /* so commands are in order with data and not split */ | |
c6d61269 AC |
501 | len = min(count, port->bulk_out_size-2-priv->dp_out_buf_len); |
502 | if (len > 4) | |
1da177e4 LT |
503 | len &= ~3; |
504 | ||
505 | /* write any buffered data first */ | |
c6d61269 | 506 | if (priv->dp_out_buf_len > 0) { |
1da177e4 LT |
507 | data[0] = DIGI_CMD_SEND_DATA; |
508 | data[1] = priv->dp_out_buf_len; | |
c6d61269 AC |
509 | memcpy(data + 2, priv->dp_out_buf, |
510 | priv->dp_out_buf_len); | |
511 | memcpy(data + 2 + priv->dp_out_buf_len, buf, len); | |
1da177e4 | 512 | port->write_urb->transfer_buffer_length |
c6d61269 | 513 | = priv->dp_out_buf_len + 2 + len; |
1da177e4 | 514 | } else { |
c6d61269 | 515 | memcpy(data, buf, len); |
1da177e4 LT |
516 | port->write_urb->transfer_buffer_length = len; |
517 | } | |
1da177e4 | 518 | |
41ad427d AC |
519 | ret = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
520 | if (ret == 0) { | |
1da177e4 LT |
521 | priv->dp_write_urb_in_use = 1; |
522 | priv->dp_out_buf_len = 0; | |
523 | count -= len; | |
524 | buf += len; | |
525 | } | |
526 | ||
527 | } | |
c6d61269 | 528 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
1da177e4 | 529 | |
c6d61269 | 530 | if (ret) |
194343d9 GKH |
531 | dev_err(&port->dev, |
532 | "%s: usb_submit_urb failed, ret=%d, port=%d\n", | |
441b62c1 | 533 | __func__, ret, priv->dp_port_num); |
c6d61269 | 534 | return ret; |
1da177e4 LT |
535 | } |
536 | ||
537 | ||
538 | /* | |
41ad427d AC |
539 | * Digi Set Modem Signals |
540 | * | |
541 | * Sets or clears DTR and RTS on the port, according to the | |
542 | * modem_signals argument. Use TIOCM_DTR and TIOCM_RTS flags | |
543 | * for the modem_signals argument. Returns 0 if successful, | |
544 | * -EINTR if interrupted while sleeping, or a non-zero error | |
545 | * returned by usb_submit_urb. | |
546 | */ | |
1da177e4 | 547 | |
c6d61269 AC |
548 | static int digi_set_modem_signals(struct usb_serial_port *port, |
549 | unsigned int modem_signals, int interruptible) | |
1da177e4 LT |
550 | { |
551 | ||
552 | int ret; | |
553 | struct digi_port *port_priv = usb_get_serial_port_data(port); | |
41ad427d | 554 | struct usb_serial_port *oob_port = (struct usb_serial_port *) ((struct digi_serial *)(usb_get_serial_data(port->serial)))->ds_oob_port; |
1da177e4 LT |
555 | struct digi_port *oob_priv = usb_get_serial_port_data(oob_port); |
556 | unsigned char *data = oob_port->write_urb->transfer_buffer; | |
557 | unsigned long flags = 0; | |
558 | ||
559 | ||
c6d61269 AC |
560 | dbg("digi_set_modem_signals: TOP: port=%d, modem_signals=0x%x", |
561 | port_priv->dp_port_num, modem_signals); | |
1da177e4 | 562 | |
c6d61269 AC |
563 | spin_lock_irqsave(&oob_priv->dp_port_lock, flags); |
564 | spin_lock(&port_priv->dp_port_lock); | |
1da177e4 | 565 | |
50de36f7 | 566 | while (oob_priv->dp_write_urb_in_use) { |
c6d61269 | 567 | spin_unlock(&port_priv->dp_port_lock); |
1da177e4 LT |
568 | cond_wait_interruptible_timeout_irqrestore( |
569 | &oob_port->write_wait, DIGI_RETRY_TIMEOUT, | |
c6d61269 AC |
570 | &oob_priv->dp_port_lock, flags); |
571 | if (interruptible && signal_pending(current)) | |
572 | return -EINTR; | |
573 | spin_lock_irqsave(&oob_priv->dp_port_lock, flags); | |
574 | spin_lock(&port_priv->dp_port_lock); | |
1da177e4 | 575 | } |
1da177e4 LT |
576 | data[0] = DIGI_CMD_SET_DTR_SIGNAL; |
577 | data[1] = port_priv->dp_port_num; | |
41ad427d AC |
578 | data[2] = (modem_signals & TIOCM_DTR) ? |
579 | DIGI_DTR_ACTIVE : DIGI_DTR_INACTIVE; | |
1da177e4 | 580 | data[3] = 0; |
1da177e4 LT |
581 | data[4] = DIGI_CMD_SET_RTS_SIGNAL; |
582 | data[5] = port_priv->dp_port_num; | |
41ad427d AC |
583 | data[6] = (modem_signals & TIOCM_RTS) ? |
584 | DIGI_RTS_ACTIVE : DIGI_RTS_INACTIVE; | |
1da177e4 LT |
585 | data[7] = 0; |
586 | ||
587 | oob_port->write_urb->transfer_buffer_length = 8; | |
1da177e4 | 588 | |
41ad427d AC |
589 | ret = usb_submit_urb(oob_port->write_urb, GFP_ATOMIC); |
590 | if (ret == 0) { | |
1da177e4 LT |
591 | oob_priv->dp_write_urb_in_use = 1; |
592 | port_priv->dp_modem_signals = | |
593 | (port_priv->dp_modem_signals&~(TIOCM_DTR|TIOCM_RTS)) | |
594 | | (modem_signals&(TIOCM_DTR|TIOCM_RTS)); | |
595 | } | |
c6d61269 AC |
596 | spin_unlock(&port_priv->dp_port_lock); |
597 | spin_unlock_irqrestore(&oob_priv->dp_port_lock, flags); | |
598 | if (ret) | |
194343d9 GKH |
599 | dev_err(&port->dev, "%s: usb_submit_urb failed, ret=%d\n", |
600 | __func__, ret); | |
c6d61269 | 601 | return ret; |
1da177e4 LT |
602 | } |
603 | ||
1da177e4 | 604 | /* |
41ad427d AC |
605 | * Digi Transmit Idle |
606 | * | |
607 | * Digi transmit idle waits, up to timeout ticks, for the transmitter | |
608 | * to go idle. It returns 0 if successful or a negative error. | |
609 | * | |
610 | * There are race conditions here if more than one process is calling | |
611 | * digi_transmit_idle on the same port at the same time. However, this | |
612 | * is only called from close, and only one process can be in close on a | |
613 | * port at a time, so its ok. | |
614 | */ | |
1da177e4 | 615 | |
c6d61269 AC |
616 | static int digi_transmit_idle(struct usb_serial_port *port, |
617 | unsigned long timeout) | |
1da177e4 | 618 | { |
1da177e4 LT |
619 | int ret; |
620 | unsigned char buf[2]; | |
621 | struct digi_port *priv = usb_get_serial_port_data(port); | |
622 | unsigned long flags = 0; | |
623 | ||
c6d61269 | 624 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 | 625 | priv->dp_transmit_idle = 0; |
c6d61269 | 626 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
1da177e4 LT |
627 | |
628 | buf[0] = DIGI_CMD_TRANSMIT_IDLE; | |
629 | buf[1] = 0; | |
630 | ||
631 | timeout += jiffies; | |
632 | ||
41ad427d AC |
633 | ret = digi_write_inb_command(port, buf, 2, timeout - jiffies); |
634 | if (ret != 0) | |
c6d61269 | 635 | return ret; |
1da177e4 | 636 | |
c6d61269 | 637 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 | 638 | |
41ad427d | 639 | while (time_before(jiffies, timeout) && !priv->dp_transmit_idle) { |
1da177e4 LT |
640 | cond_wait_interruptible_timeout_irqrestore( |
641 | &priv->dp_transmit_idle_wait, DIGI_RETRY_TIMEOUT, | |
c6d61269 AC |
642 | &priv->dp_port_lock, flags); |
643 | if (signal_pending(current)) | |
644 | return -EINTR; | |
645 | spin_lock_irqsave(&priv->dp_port_lock, flags); | |
1da177e4 | 646 | } |
1da177e4 | 647 | priv->dp_transmit_idle = 0; |
c6d61269 AC |
648 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
649 | return 0; | |
1da177e4 LT |
650 | |
651 | } | |
652 | ||
653 | ||
95da310e | 654 | static void digi_rx_throttle(struct tty_struct *tty) |
1da177e4 | 655 | { |
1da177e4 | 656 | unsigned long flags; |
95da310e | 657 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
658 | struct digi_port *priv = usb_get_serial_port_data(port); |
659 | ||
660 | ||
c6d61269 | 661 | dbg("digi_rx_throttle: TOP: port=%d", priv->dp_port_num); |
1da177e4 LT |
662 | |
663 | /* stop receiving characters by not resubmitting the read urb */ | |
c6d61269 | 664 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 LT |
665 | priv->dp_throttled = 1; |
666 | priv->dp_throttle_restart = 0; | |
c6d61269 | 667 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
1da177e4 LT |
668 | } |
669 | ||
670 | ||
95da310e | 671 | static void digi_rx_unthrottle(struct tty_struct *tty) |
1da177e4 | 672 | { |
1da177e4 | 673 | int ret = 0; |
1da177e4 | 674 | unsigned long flags; |
95da310e | 675 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 676 | struct digi_port *priv = usb_get_serial_port_data(port); |
1da177e4 | 677 | |
c6d61269 | 678 | dbg("digi_rx_unthrottle: TOP: port=%d", priv->dp_port_num); |
1da177e4 | 679 | |
c6d61269 | 680 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 | 681 | |
1da177e4 | 682 | /* restart read chain */ |
5833041f | 683 | if (priv->dp_throttle_restart) |
c6d61269 | 684 | ret = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
1da177e4 | 685 | |
ba6b702f JH |
686 | /* turn throttle off */ |
687 | priv->dp_throttled = 0; | |
688 | priv->dp_throttle_restart = 0; | |
689 | ||
c6d61269 | 690 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
1da177e4 | 691 | |
c6d61269 | 692 | if (ret) |
194343d9 GKH |
693 | dev_err(&port->dev, |
694 | "%s: usb_submit_urb failed, ret=%d, port=%d\n", | |
441b62c1 | 695 | __func__, ret, priv->dp_port_num); |
1da177e4 LT |
696 | } |
697 | ||
698 | ||
41ad427d | 699 | static void digi_set_termios(struct tty_struct *tty, |
95da310e | 700 | struct usb_serial_port *port, struct ktermios *old_termios) |
1da177e4 | 701 | { |
1da177e4 | 702 | struct digi_port *priv = usb_get_serial_port_data(port); |
c6d61269 AC |
703 | unsigned int iflag = tty->termios->c_iflag; |
704 | unsigned int cflag = tty->termios->c_cflag; | |
1da177e4 LT |
705 | unsigned int old_iflag = old_termios->c_iflag; |
706 | unsigned int old_cflag = old_termios->c_cflag; | |
707 | unsigned char buf[32]; | |
708 | unsigned int modem_signals; | |
41ad427d | 709 | int arg, ret; |
1da177e4 | 710 | int i = 0; |
c6d61269 | 711 | speed_t baud; |
1da177e4 | 712 | |
c6d61269 | 713 | 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 |
714 | |
715 | /* set baud rate */ | |
41ad427d AC |
716 | baud = tty_get_baud_rate(tty); |
717 | if (baud != tty_termios_baud_rate(old_termios)) { | |
1da177e4 LT |
718 | arg = -1; |
719 | ||
720 | /* reassert DTR and (maybe) RTS on transition from B0 */ | |
c6d61269 | 721 | if ((old_cflag&CBAUD) == B0) { |
1da177e4 LT |
722 | /* don't set RTS if using hardware flow control */ |
723 | /* and throttling input */ | |
724 | modem_signals = TIOCM_DTR; | |
c6d61269 AC |
725 | if (!(tty->termios->c_cflag & CRTSCTS) || |
726 | !test_bit(TTY_THROTTLED, &tty->flags)) | |
1da177e4 | 727 | modem_signals |= TIOCM_RTS; |
c6d61269 | 728 | digi_set_modem_signals(port, modem_signals, 1); |
1da177e4 | 729 | } |
c6d61269 | 730 | switch (baud) { |
41ad427d AC |
731 | /* drop DTR and RTS on transition to B0 */ |
732 | case 0: digi_set_modem_signals(port, 0, 1); break; | |
733 | case 50: arg = DIGI_BAUD_50; break; | |
734 | case 75: arg = DIGI_BAUD_75; break; | |
735 | case 110: arg = DIGI_BAUD_110; break; | |
736 | case 150: arg = DIGI_BAUD_150; break; | |
737 | case 200: arg = DIGI_BAUD_200; break; | |
738 | case 300: arg = DIGI_BAUD_300; break; | |
739 | case 600: arg = DIGI_BAUD_600; break; | |
740 | case 1200: arg = DIGI_BAUD_1200; break; | |
741 | case 1800: arg = DIGI_BAUD_1800; break; | |
742 | case 2400: arg = DIGI_BAUD_2400; break; | |
743 | case 4800: arg = DIGI_BAUD_4800; break; | |
744 | case 9600: arg = DIGI_BAUD_9600; break; | |
745 | case 19200: arg = DIGI_BAUD_19200; break; | |
746 | case 38400: arg = DIGI_BAUD_38400; break; | |
747 | case 57600: arg = DIGI_BAUD_57600; break; | |
748 | case 115200: arg = DIGI_BAUD_115200; break; | |
749 | case 230400: arg = DIGI_BAUD_230400; break; | |
750 | case 460800: arg = DIGI_BAUD_460800; break; | |
751 | default: | |
752 | arg = DIGI_BAUD_9600; | |
753 | baud = 9600; | |
754 | break; | |
1da177e4 | 755 | } |
c6d61269 | 756 | if (arg != -1) { |
1da177e4 LT |
757 | buf[i++] = DIGI_CMD_SET_BAUD_RATE; |
758 | buf[i++] = priv->dp_port_num; | |
759 | buf[i++] = arg; | |
760 | buf[i++] = 0; | |
761 | } | |
1da177e4 | 762 | } |
1da177e4 | 763 | /* set parity */ |
7fa36a99 AC |
764 | tty->termios->c_cflag &= ~CMSPAR; |
765 | ||
c6d61269 AC |
766 | if ((cflag&(PARENB|PARODD)) != (old_cflag&(PARENB|PARODD))) { |
767 | if (cflag&PARENB) { | |
768 | if (cflag&PARODD) | |
1da177e4 LT |
769 | arg = DIGI_PARITY_ODD; |
770 | else | |
771 | arg = DIGI_PARITY_EVEN; | |
772 | } else { | |
773 | arg = DIGI_PARITY_NONE; | |
774 | } | |
1da177e4 LT |
775 | buf[i++] = DIGI_CMD_SET_PARITY; |
776 | buf[i++] = priv->dp_port_num; | |
777 | buf[i++] = arg; | |
778 | buf[i++] = 0; | |
1da177e4 | 779 | } |
1da177e4 | 780 | /* set word size */ |
c6d61269 | 781 | if ((cflag&CSIZE) != (old_cflag&CSIZE)) { |
1da177e4 | 782 | arg = -1; |
c6d61269 | 783 | switch (cflag&CSIZE) { |
1da177e4 LT |
784 | case CS5: arg = DIGI_WORD_SIZE_5; break; |
785 | case CS6: arg = DIGI_WORD_SIZE_6; break; | |
786 | case CS7: arg = DIGI_WORD_SIZE_7; break; | |
787 | case CS8: arg = DIGI_WORD_SIZE_8; break; | |
788 | default: | |
c6d61269 AC |
789 | dbg("digi_set_termios: can't handle word size %d", |
790 | (cflag&CSIZE)); | |
1da177e4 LT |
791 | break; |
792 | } | |
793 | ||
c6d61269 | 794 | if (arg != -1) { |
1da177e4 LT |
795 | buf[i++] = DIGI_CMD_SET_WORD_SIZE; |
796 | buf[i++] = priv->dp_port_num; | |
797 | buf[i++] = arg; | |
798 | buf[i++] = 0; | |
799 | } | |
800 | ||
801 | } | |
802 | ||
803 | /* set stop bits */ | |
c6d61269 | 804 | if ((cflag&CSTOPB) != (old_cflag&CSTOPB)) { |
1da177e4 | 805 | |
c6d61269 | 806 | if ((cflag&CSTOPB)) |
1da177e4 LT |
807 | arg = DIGI_STOP_BITS_2; |
808 | else | |
809 | arg = DIGI_STOP_BITS_1; | |
810 | ||
811 | buf[i++] = DIGI_CMD_SET_STOP_BITS; | |
812 | buf[i++] = priv->dp_port_num; | |
813 | buf[i++] = arg; | |
814 | buf[i++] = 0; | |
815 | ||
816 | } | |
817 | ||
818 | /* set input flow control */ | |
c6d61269 AC |
819 | if ((iflag&IXOFF) != (old_iflag&IXOFF) |
820 | || (cflag&CRTSCTS) != (old_cflag&CRTSCTS)) { | |
1da177e4 | 821 | arg = 0; |
c6d61269 | 822 | if (iflag&IXOFF) |
1da177e4 LT |
823 | arg |= DIGI_INPUT_FLOW_CONTROL_XON_XOFF; |
824 | else | |
825 | arg &= ~DIGI_INPUT_FLOW_CONTROL_XON_XOFF; | |
826 | ||
c6d61269 | 827 | if (cflag&CRTSCTS) { |
1da177e4 LT |
828 | arg |= DIGI_INPUT_FLOW_CONTROL_RTS; |
829 | ||
830 | /* On USB-4 it is necessary to assert RTS prior */ | |
831 | /* to selecting RTS input flow control. */ | |
832 | buf[i++] = DIGI_CMD_SET_RTS_SIGNAL; | |
833 | buf[i++] = priv->dp_port_num; | |
834 | buf[i++] = DIGI_RTS_ACTIVE; | |
835 | buf[i++] = 0; | |
836 | ||
837 | } else { | |
838 | arg &= ~DIGI_INPUT_FLOW_CONTROL_RTS; | |
839 | } | |
1da177e4 LT |
840 | buf[i++] = DIGI_CMD_SET_INPUT_FLOW_CONTROL; |
841 | buf[i++] = priv->dp_port_num; | |
842 | buf[i++] = arg; | |
843 | buf[i++] = 0; | |
1da177e4 LT |
844 | } |
845 | ||
846 | /* set output flow control */ | |
7fa36a99 AC |
847 | if ((iflag & IXON) != (old_iflag & IXON) |
848 | || (cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { | |
1da177e4 | 849 | arg = 0; |
7fa36a99 | 850 | if (iflag & IXON) |
1da177e4 LT |
851 | arg |= DIGI_OUTPUT_FLOW_CONTROL_XON_XOFF; |
852 | else | |
853 | arg &= ~DIGI_OUTPUT_FLOW_CONTROL_XON_XOFF; | |
854 | ||
7fa36a99 | 855 | if (cflag & CRTSCTS) { |
1da177e4 LT |
856 | arg |= DIGI_OUTPUT_FLOW_CONTROL_CTS; |
857 | } else { | |
858 | arg &= ~DIGI_OUTPUT_FLOW_CONTROL_CTS; | |
c6d61269 | 859 | tty->hw_stopped = 0; |
1da177e4 LT |
860 | } |
861 | ||
862 | buf[i++] = DIGI_CMD_SET_OUTPUT_FLOW_CONTROL; | |
863 | buf[i++] = priv->dp_port_num; | |
864 | buf[i++] = arg; | |
865 | buf[i++] = 0; | |
1da177e4 LT |
866 | } |
867 | ||
868 | /* set receive enable/disable */ | |
7fa36a99 AC |
869 | if ((cflag & CREAD) != (old_cflag & CREAD)) { |
870 | if (cflag & CREAD) | |
1da177e4 LT |
871 | arg = DIGI_ENABLE; |
872 | else | |
873 | arg = DIGI_DISABLE; | |
874 | ||
875 | buf[i++] = DIGI_CMD_RECEIVE_ENABLE; | |
876 | buf[i++] = priv->dp_port_num; | |
877 | buf[i++] = arg; | |
878 | buf[i++] = 0; | |
1da177e4 | 879 | } |
41ad427d AC |
880 | ret = digi_write_oob_command(port, buf, i, 1); |
881 | if (ret != 0) | |
c6d61269 | 882 | dbg("digi_set_termios: write oob failed, ret=%d", ret); |
7fa36a99 | 883 | tty_encode_baud_rate(tty, baud, baud); |
1da177e4 LT |
884 | } |
885 | ||
886 | ||
95da310e | 887 | static void digi_break_ctl(struct tty_struct *tty, int break_state) |
1da177e4 | 888 | { |
95da310e | 889 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
890 | unsigned char buf[4]; |
891 | ||
1da177e4 LT |
892 | buf[0] = DIGI_CMD_BREAK_CONTROL; |
893 | buf[1] = 2; /* length */ | |
894 | buf[2] = break_state ? 1 : 0; | |
895 | buf[3] = 0; /* pad */ | |
c6d61269 | 896 | digi_write_inb_command(port, buf, 4, 0); |
1da177e4 LT |
897 | } |
898 | ||
899 | ||
60b33c13 | 900 | static int digi_tiocmget(struct tty_struct *tty) |
1da177e4 | 901 | { |
95da310e | 902 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
903 | struct digi_port *priv = usb_get_serial_port_data(port); |
904 | unsigned int val; | |
905 | unsigned long flags; | |
906 | ||
441b62c1 | 907 | dbg("%s: TOP: port=%d", __func__, priv->dp_port_num); |
1da177e4 | 908 | |
c6d61269 | 909 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 | 910 | val = priv->dp_modem_signals; |
c6d61269 | 911 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
1da177e4 LT |
912 | return val; |
913 | } | |
914 | ||
915 | ||
20b9d177 AC |
916 | static int digi_tiocmset(struct tty_struct *tty, |
917 | unsigned int set, unsigned int clear) | |
1da177e4 | 918 | { |
95da310e | 919 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
920 | struct digi_port *priv = usb_get_serial_port_data(port); |
921 | unsigned int val; | |
922 | unsigned long flags; | |
923 | ||
441b62c1 | 924 | dbg("%s: TOP: port=%d", __func__, priv->dp_port_num); |
1da177e4 | 925 | |
c6d61269 | 926 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 | 927 | val = (priv->dp_modem_signals & ~clear) | set; |
c6d61269 AC |
928 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
929 | return digi_set_modem_signals(port, val, 1); | |
1da177e4 LT |
930 | } |
931 | ||
932 | ||
95da310e AC |
933 | static int digi_write(struct tty_struct *tty, struct usb_serial_port *port, |
934 | const unsigned char *buf, int count) | |
1da177e4 LT |
935 | { |
936 | ||
41ad427d | 937 | int ret, data_len, new_len; |
1da177e4 LT |
938 | struct digi_port *priv = usb_get_serial_port_data(port); |
939 | unsigned char *data = port->write_urb->transfer_buffer; | |
940 | unsigned long flags = 0; | |
941 | ||
c6d61269 AC |
942 | dbg("digi_write: TOP: port=%d, count=%d, in_interrupt=%ld", |
943 | priv->dp_port_num, count, in_interrupt()); | |
1da177e4 LT |
944 | |
945 | /* copy user data (which can sleep) before getting spin lock */ | |
c6d61269 AC |
946 | count = min(count, port->bulk_out_size-2); |
947 | count = min(64, count); | |
1da177e4 LT |
948 | |
949 | /* be sure only one write proceeds at a time */ | |
950 | /* there are races on the port private buffer */ | |
c6d61269 | 951 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 LT |
952 | |
953 | /* wait for urb status clear to submit another urb */ | |
50de36f7 | 954 | if (priv->dp_write_urb_in_use) { |
1da177e4 | 955 | /* buffer data if count is 1 (probably put_char) if possible */ |
c6d61269 | 956 | if (count == 1 && priv->dp_out_buf_len < DIGI_OUT_BUF_SIZE) { |
1da177e4 LT |
957 | priv->dp_out_buf[priv->dp_out_buf_len++] = *buf; |
958 | new_len = 1; | |
959 | } else { | |
960 | new_len = 0; | |
961 | } | |
c6d61269 AC |
962 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
963 | return new_len; | |
1da177e4 LT |
964 | } |
965 | ||
966 | /* allow space for any buffered data and for new data, up to */ | |
967 | /* transfer buffer size - 2 (for command and length bytes) */ | |
968 | new_len = min(count, port->bulk_out_size-2-priv->dp_out_buf_len); | |
969 | data_len = new_len + priv->dp_out_buf_len; | |
970 | ||
c6d61269 AC |
971 | if (data_len == 0) { |
972 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); | |
973 | return 0; | |
1da177e4 LT |
974 | } |
975 | ||
976 | port->write_urb->transfer_buffer_length = data_len+2; | |
1da177e4 LT |
977 | |
978 | *data++ = DIGI_CMD_SEND_DATA; | |
979 | *data++ = data_len; | |
980 | ||
981 | /* copy in buffered data first */ | |
c6d61269 | 982 | memcpy(data, priv->dp_out_buf, priv->dp_out_buf_len); |
1da177e4 LT |
983 | data += priv->dp_out_buf_len; |
984 | ||
985 | /* copy in new data */ | |
c6d61269 | 986 | memcpy(data, buf, new_len); |
1da177e4 | 987 | |
41ad427d AC |
988 | ret = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
989 | if (ret == 0) { | |
1da177e4 LT |
990 | priv->dp_write_urb_in_use = 1; |
991 | ret = new_len; | |
992 | priv->dp_out_buf_len = 0; | |
993 | } | |
994 | ||
995 | /* return length of new data written, or error */ | |
c6d61269 AC |
996 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
997 | if (ret < 0) | |
194343d9 GKH |
998 | dev_err(&port->dev, |
999 | "%s: usb_submit_urb failed, ret=%d, port=%d\n", | |
441b62c1 | 1000 | __func__, ret, priv->dp_port_num); |
c6d61269 AC |
1001 | dbg("digi_write: returning %d", ret); |
1002 | return ret; | |
1da177e4 | 1003 | |
41ad427d | 1004 | } |
1da177e4 | 1005 | |
c6d61269 | 1006 | static void digi_write_bulk_callback(struct urb *urb) |
1da177e4 LT |
1007 | { |
1008 | ||
cdc97792 | 1009 | struct usb_serial_port *port = urb->context; |
1da177e4 LT |
1010 | struct usb_serial *serial; |
1011 | struct digi_port *priv; | |
1012 | struct digi_serial *serial_priv; | |
1013 | int ret = 0; | |
85d75107 | 1014 | int status = urb->status; |
1da177e4 | 1015 | |
50de36f7 | 1016 | dbg("digi_write_bulk_callback: TOP, status=%d", status); |
1da177e4 LT |
1017 | |
1018 | /* port and serial sanity check */ | |
41ad427d | 1019 | if (port == NULL || (priv = usb_get_serial_port_data(port)) == NULL) { |
109f34e7 | 1020 | pr_err("%s: port or port->private is NULL, status=%d\n", |
194343d9 | 1021 | __func__, status); |
1da177e4 LT |
1022 | return; |
1023 | } | |
1024 | serial = port->serial; | |
41ad427d | 1025 | if (serial == NULL || (serial_priv = usb_get_serial_data(serial)) == NULL) { |
194343d9 GKH |
1026 | dev_err(&port->dev, |
1027 | "%s: serial or serial->private is NULL, status=%d\n", | |
1028 | __func__, status); | |
1da177e4 LT |
1029 | return; |
1030 | } | |
1031 | ||
1032 | /* handle oob callback */ | |
c6d61269 AC |
1033 | if (priv->dp_port_num == serial_priv->ds_oob_port_num) { |
1034 | dbg("digi_write_bulk_callback: oob callback"); | |
1035 | spin_lock(&priv->dp_port_lock); | |
1da177e4 | 1036 | priv->dp_write_urb_in_use = 0; |
c6d61269 AC |
1037 | wake_up_interruptible(&port->write_wait); |
1038 | spin_unlock(&priv->dp_port_lock); | |
1da177e4 LT |
1039 | return; |
1040 | } | |
1041 | ||
1f87158e | 1042 | /* try to send any buffered data on this port */ |
c6d61269 | 1043 | spin_lock(&priv->dp_port_lock); |
1da177e4 | 1044 | priv->dp_write_urb_in_use = 0; |
1f87158e | 1045 | if (priv->dp_out_buf_len > 0) { |
1da177e4 LT |
1046 | *((unsigned char *)(port->write_urb->transfer_buffer)) |
1047 | = (unsigned char)DIGI_CMD_SEND_DATA; | |
41ad427d | 1048 | *((unsigned char *)(port->write_urb->transfer_buffer) + 1) |
1da177e4 | 1049 | = (unsigned char)priv->dp_out_buf_len; |
41ad427d AC |
1050 | port->write_urb->transfer_buffer_length = |
1051 | priv->dp_out_buf_len + 2; | |
41ad427d | 1052 | memcpy(port->write_urb->transfer_buffer + 2, priv->dp_out_buf, |
c6d61269 | 1053 | priv->dp_out_buf_len); |
41ad427d AC |
1054 | ret = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
1055 | if (ret == 0) { | |
1da177e4 LT |
1056 | priv->dp_write_urb_in_use = 1; |
1057 | priv->dp_out_buf_len = 0; | |
1058 | } | |
1da177e4 | 1059 | } |
1da177e4 | 1060 | /* wake up processes sleeping on writes immediately */ |
c6d61269 | 1061 | digi_wakeup_write(port); |
1da177e4 LT |
1062 | /* also queue up a wakeup at scheduler time, in case we */ |
1063 | /* lost the race in write_chan(). */ | |
1064 | schedule_work(&priv->dp_wakeup_work); | |
1065 | ||
c6d61269 | 1066 | spin_unlock(&priv->dp_port_lock); |
1f87158e | 1067 | if (ret && ret != -EPERM) |
194343d9 GKH |
1068 | dev_err(&port->dev, |
1069 | "%s: usb_submit_urb failed, ret=%d, port=%d\n", | |
441b62c1 | 1070 | __func__, ret, priv->dp_port_num); |
1da177e4 LT |
1071 | } |
1072 | ||
95da310e | 1073 | static int digi_write_room(struct tty_struct *tty) |
1da177e4 | 1074 | { |
95da310e | 1075 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 1076 | struct digi_port *priv = usb_get_serial_port_data(port); |
95da310e | 1077 | int room; |
1da177e4 LT |
1078 | unsigned long flags = 0; |
1079 | ||
c6d61269 | 1080 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 | 1081 | |
50de36f7 | 1082 | if (priv->dp_write_urb_in_use) |
1da177e4 LT |
1083 | room = 0; |
1084 | else | |
1085 | room = port->bulk_out_size - 2 - priv->dp_out_buf_len; | |
1086 | ||
c6d61269 AC |
1087 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
1088 | dbg("digi_write_room: port=%d, room=%d", priv->dp_port_num, room); | |
1089 | return room; | |
1da177e4 LT |
1090 | |
1091 | } | |
1092 | ||
95da310e | 1093 | static int digi_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 1094 | { |
95da310e | 1095 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
1096 | struct digi_port *priv = usb_get_serial_port_data(port); |
1097 | ||
50de36f7 | 1098 | if (priv->dp_write_urb_in_use) { |
c6d61269 AC |
1099 | dbg("digi_chars_in_buffer: port=%d, chars=%d", |
1100 | priv->dp_port_num, port->bulk_out_size - 2); | |
1101 | /* return(port->bulk_out_size - 2); */ | |
1102 | return 256; | |
1da177e4 | 1103 | } else { |
c6d61269 AC |
1104 | dbg("digi_chars_in_buffer: port=%d, chars=%d", |
1105 | priv->dp_port_num, priv->dp_out_buf_len); | |
1106 | return priv->dp_out_buf_len; | |
1da177e4 LT |
1107 | } |
1108 | ||
1109 | } | |
1110 | ||
335f8514 AC |
1111 | static void digi_dtr_rts(struct usb_serial_port *port, int on) |
1112 | { | |
1113 | /* Adjust DTR and RTS */ | |
1114 | digi_set_modem_signals(port, on * (TIOCM_DTR|TIOCM_RTS), 1); | |
1115 | } | |
1116 | ||
a509a7e4 | 1117 | static int digi_open(struct tty_struct *tty, struct usb_serial_port *port) |
1da177e4 | 1118 | { |
1da177e4 LT |
1119 | int ret; |
1120 | unsigned char buf[32]; | |
1121 | struct digi_port *priv = usb_get_serial_port_data(port); | |
606d099c | 1122 | struct ktermios not_termios; |
1da177e4 | 1123 | |
1f87158e | 1124 | dbg("digi_open: TOP: port=%d", priv->dp_port_num); |
1da177e4 LT |
1125 | |
1126 | /* be sure the device is started up */ | |
c6d61269 AC |
1127 | if (digi_startup_device(port->serial) != 0) |
1128 | return -ENXIO; | |
1da177e4 | 1129 | |
1da177e4 LT |
1130 | /* read modem signals automatically whenever they change */ |
1131 | buf[0] = DIGI_CMD_READ_INPUT_SIGNALS; | |
1132 | buf[1] = priv->dp_port_num; | |
1133 | buf[2] = DIGI_ENABLE; | |
1134 | buf[3] = 0; | |
1135 | ||
1136 | /* flush fifos */ | |
1137 | buf[4] = DIGI_CMD_IFLUSH_FIFO; | |
1138 | buf[5] = priv->dp_port_num; | |
1139 | buf[6] = DIGI_FLUSH_TX | DIGI_FLUSH_RX; | |
1140 | buf[7] = 0; | |
1141 | ||
41ad427d AC |
1142 | ret = digi_write_oob_command(port, buf, 8, 1); |
1143 | if (ret != 0) | |
c6d61269 | 1144 | dbg("digi_open: write oob failed, ret=%d", ret); |
1da177e4 LT |
1145 | |
1146 | /* set termios settings */ | |
95da310e AC |
1147 | if (tty) { |
1148 | not_termios.c_cflag = ~tty->termios->c_cflag; | |
1149 | not_termios.c_iflag = ~tty->termios->c_iflag; | |
1150 | digi_set_termios(tty, port, ¬_termios); | |
1151 | } | |
c6d61269 | 1152 | return 0; |
1da177e4 LT |
1153 | } |
1154 | ||
1155 | ||
335f8514 | 1156 | static void digi_close(struct usb_serial_port *port) |
1da177e4 LT |
1157 | { |
1158 | DEFINE_WAIT(wait); | |
1159 | int ret; | |
1160 | unsigned char buf[32]; | |
1da177e4 | 1161 | struct digi_port *priv = usb_get_serial_port_data(port); |
1da177e4 | 1162 | |
1f87158e | 1163 | dbg("digi_close: TOP: port=%d", priv->dp_port_num); |
1da177e4 | 1164 | |
0915f490 | 1165 | mutex_lock(&port->serial->disc_mutex); |
1da177e4 | 1166 | /* if disconnected, just clear flags */ |
0915f490 | 1167 | if (port->serial->disconnected) |
1da177e4 LT |
1168 | goto exit; |
1169 | ||
1da177e4 | 1170 | if (port->serial->dev) { |
335f8514 AC |
1171 | /* FIXME: Transmit idle belongs in the wait_unti_sent path */ |
1172 | digi_transmit_idle(port, DIGI_CLOSE_TIMEOUT); | |
1da177e4 LT |
1173 | |
1174 | /* disable input flow control */ | |
1175 | buf[0] = DIGI_CMD_SET_INPUT_FLOW_CONTROL; | |
1176 | buf[1] = priv->dp_port_num; | |
1177 | buf[2] = DIGI_DISABLE; | |
1178 | buf[3] = 0; | |
1179 | ||
1180 | /* disable output flow control */ | |
1181 | buf[4] = DIGI_CMD_SET_OUTPUT_FLOW_CONTROL; | |
1182 | buf[5] = priv->dp_port_num; | |
1183 | buf[6] = DIGI_DISABLE; | |
1184 | buf[7] = 0; | |
1185 | ||
1186 | /* disable reading modem signals automatically */ | |
1187 | buf[8] = DIGI_CMD_READ_INPUT_SIGNALS; | |
1188 | buf[9] = priv->dp_port_num; | |
1189 | buf[10] = DIGI_DISABLE; | |
1190 | buf[11] = 0; | |
1191 | ||
1192 | /* disable receive */ | |
1193 | buf[12] = DIGI_CMD_RECEIVE_ENABLE; | |
1194 | buf[13] = priv->dp_port_num; | |
1195 | buf[14] = DIGI_DISABLE; | |
1196 | buf[15] = 0; | |
1197 | ||
1198 | /* flush fifos */ | |
1199 | buf[16] = DIGI_CMD_IFLUSH_FIFO; | |
1200 | buf[17] = priv->dp_port_num; | |
1201 | buf[18] = DIGI_FLUSH_TX | DIGI_FLUSH_RX; | |
1202 | buf[19] = 0; | |
1203 | ||
41ad427d AC |
1204 | ret = digi_write_oob_command(port, buf, 20, 0); |
1205 | if (ret != 0) | |
c6d61269 | 1206 | dbg("digi_close: write oob failed, ret=%d", ret); |
1da177e4 LT |
1207 | |
1208 | /* wait for final commands on oob port to complete */ | |
41ad427d AC |
1209 | prepare_to_wait(&priv->dp_flush_wait, &wait, |
1210 | TASK_INTERRUPTIBLE); | |
1da177e4 LT |
1211 | schedule_timeout(DIGI_CLOSE_TIMEOUT); |
1212 | finish_wait(&priv->dp_flush_wait, &wait); | |
1213 | ||
1214 | /* shutdown any outstanding bulk writes */ | |
1215 | usb_kill_urb(port->write_urb); | |
1216 | } | |
1da177e4 | 1217 | exit: |
0915f490 | 1218 | spin_lock_irq(&priv->dp_port_lock); |
1da177e4 | 1219 | priv->dp_write_urb_in_use = 0; |
c6d61269 | 1220 | wake_up_interruptible(&priv->dp_close_wait); |
0915f490 ON |
1221 | spin_unlock_irq(&priv->dp_port_lock); |
1222 | mutex_unlock(&port->serial->disc_mutex); | |
c6d61269 | 1223 | dbg("digi_close: done"); |
1da177e4 LT |
1224 | } |
1225 | ||
1226 | ||
1227 | /* | |
41ad427d AC |
1228 | * Digi Startup Device |
1229 | * | |
1230 | * Starts reads on all ports. Must be called AFTER startup, with | |
1231 | * urbs initialized. Returns 0 if successful, non-zero error otherwise. | |
1232 | */ | |
1da177e4 | 1233 | |
c6d61269 | 1234 | static int digi_startup_device(struct usb_serial *serial) |
1da177e4 | 1235 | { |
41ad427d | 1236 | int i, ret = 0; |
1da177e4 LT |
1237 | struct digi_serial *serial_priv = usb_get_serial_data(serial); |
1238 | struct usb_serial_port *port; | |
1239 | ||
1da177e4 | 1240 | /* be sure this happens exactly once */ |
c6d61269 AC |
1241 | spin_lock(&serial_priv->ds_serial_lock); |
1242 | if (serial_priv->ds_device_started) { | |
1243 | spin_unlock(&serial_priv->ds_serial_lock); | |
1244 | return 0; | |
1da177e4 LT |
1245 | } |
1246 | serial_priv->ds_device_started = 1; | |
c6d61269 | 1247 | spin_unlock(&serial_priv->ds_serial_lock); |
1da177e4 LT |
1248 | |
1249 | /* start reading from each bulk in endpoint for the device */ | |
1250 | /* set USB_DISABLE_SPD flag for write bulk urbs */ | |
c6d61269 | 1251 | for (i = 0; i < serial->type->num_ports + 1; i++) { |
1da177e4 | 1252 | port = serial->port[i]; |
41ad427d AC |
1253 | ret = usb_submit_urb(port->read_urb, GFP_KERNEL); |
1254 | if (ret != 0) { | |
194343d9 GKH |
1255 | dev_err(&port->dev, |
1256 | "%s: usb_submit_urb failed, ret=%d, port=%d\n", | |
1257 | __func__, ret, i); | |
1da177e4 LT |
1258 | break; |
1259 | } | |
1da177e4 | 1260 | } |
c6d61269 | 1261 | return ret; |
1da177e4 LT |
1262 | } |
1263 | ||
1264 | ||
c6d61269 | 1265 | static int digi_startup(struct usb_serial *serial) |
1da177e4 LT |
1266 | { |
1267 | ||
1268 | int i; | |
1269 | struct digi_port *priv; | |
1270 | struct digi_serial *serial_priv; | |
1271 | ||
c6d61269 | 1272 | dbg("digi_startup: TOP"); |
1da177e4 LT |
1273 | |
1274 | /* allocate the private data structures for all ports */ | |
1275 | /* number of regular ports + 1 for the out-of-band port */ | |
41ad427d | 1276 | for (i = 0; i < serial->type->num_ports + 1; i++) { |
1da177e4 | 1277 | /* allocate port private structure */ |
c6d61269 AC |
1278 | priv = kmalloc(sizeof(struct digi_port), GFP_KERNEL); |
1279 | if (priv == NULL) { | |
1280 | while (--i >= 0) | |
1281 | kfree(usb_get_serial_port_data(serial->port[i])); | |
1282 | return 1; /* error */ | |
1da177e4 LT |
1283 | } |
1284 | ||
1285 | /* initialize port private structure */ | |
c6d61269 | 1286 | spin_lock_init(&priv->dp_port_lock); |
1da177e4 LT |
1287 | priv->dp_port_num = i; |
1288 | priv->dp_out_buf_len = 0; | |
1da177e4 LT |
1289 | priv->dp_write_urb_in_use = 0; |
1290 | priv->dp_modem_signals = 0; | |
c6d61269 | 1291 | init_waitqueue_head(&priv->dp_modem_change_wait); |
1da177e4 | 1292 | priv->dp_transmit_idle = 0; |
c6d61269 | 1293 | init_waitqueue_head(&priv->dp_transmit_idle_wait); |
1da177e4 LT |
1294 | priv->dp_throttled = 0; |
1295 | priv->dp_throttle_restart = 0; | |
c6d61269 | 1296 | init_waitqueue_head(&priv->dp_flush_wait); |
c6d61269 | 1297 | init_waitqueue_head(&priv->dp_close_wait); |
c4028958 DH |
1298 | INIT_WORK(&priv->dp_wakeup_work, digi_wakeup_write_lock); |
1299 | priv->dp_port = serial->port[i]; | |
1da177e4 | 1300 | /* initialize write wait queue for this port */ |
c6d61269 | 1301 | init_waitqueue_head(&serial->port[i]->write_wait); |
1da177e4 LT |
1302 | |
1303 | usb_set_serial_port_data(serial->port[i], priv); | |
1304 | } | |
1305 | ||
1306 | /* allocate serial private structure */ | |
c6d61269 AC |
1307 | serial_priv = kmalloc(sizeof(struct digi_serial), GFP_KERNEL); |
1308 | if (serial_priv == NULL) { | |
1309 | for (i = 0; i < serial->type->num_ports + 1; i++) | |
1310 | kfree(usb_get_serial_port_data(serial->port[i])); | |
1311 | return 1; /* error */ | |
1da177e4 LT |
1312 | } |
1313 | ||
1314 | /* initialize serial private structure */ | |
c6d61269 | 1315 | spin_lock_init(&serial_priv->ds_serial_lock); |
1da177e4 LT |
1316 | serial_priv->ds_oob_port_num = serial->type->num_ports; |
1317 | serial_priv->ds_oob_port = serial->port[serial_priv->ds_oob_port_num]; | |
1318 | serial_priv->ds_device_started = 0; | |
1319 | usb_set_serial_data(serial, serial_priv); | |
1320 | ||
c6d61269 | 1321 | return 0; |
1da177e4 LT |
1322 | } |
1323 | ||
1324 | ||
f9c99bb8 | 1325 | static void digi_disconnect(struct usb_serial *serial) |
1da177e4 | 1326 | { |
1da177e4 | 1327 | int i; |
f9c99bb8 | 1328 | dbg("digi_disconnect: TOP, in_interrupt()=%ld", in_interrupt()); |
1da177e4 LT |
1329 | |
1330 | /* stop reads and writes on all ports */ | |
c6d61269 | 1331 | for (i = 0; i < serial->type->num_ports + 1; i++) { |
1da177e4 LT |
1332 | usb_kill_urb(serial->port[i]->read_urb); |
1333 | usb_kill_urb(serial->port[i]->write_urb); | |
1334 | } | |
f9c99bb8 AS |
1335 | } |
1336 | ||
1337 | ||
1338 | static void digi_release(struct usb_serial *serial) | |
1339 | { | |
1340 | int i; | |
1341 | dbg("digi_release: TOP, in_interrupt()=%ld", in_interrupt()); | |
1da177e4 LT |
1342 | |
1343 | /* free the private data structures for all ports */ | |
1344 | /* number of regular ports + 1 for the out-of-band port */ | |
41ad427d | 1345 | for (i = 0; i < serial->type->num_ports + 1; i++) |
c6d61269 AC |
1346 | kfree(usb_get_serial_port_data(serial->port[i])); |
1347 | kfree(usb_get_serial_data(serial)); | |
1da177e4 LT |
1348 | } |
1349 | ||
1350 | ||
c6d61269 | 1351 | static void digi_read_bulk_callback(struct urb *urb) |
1da177e4 | 1352 | { |
cdc97792 | 1353 | struct usb_serial_port *port = urb->context; |
1da177e4 LT |
1354 | struct digi_port *priv; |
1355 | struct digi_serial *serial_priv; | |
1356 | int ret; | |
85d75107 | 1357 | int status = urb->status; |
1da177e4 | 1358 | |
c6d61269 | 1359 | dbg("digi_read_bulk_callback: TOP"); |
1da177e4 LT |
1360 | |
1361 | /* port sanity check, do not resubmit if port is not valid */ | |
194343d9 GKH |
1362 | if (port == NULL) |
1363 | return; | |
1364 | priv = usb_get_serial_port_data(port); | |
1365 | if (priv == NULL) { | |
1366 | dev_err(&port->dev, "%s: port->private is NULL, status=%d\n", | |
1367 | __func__, status); | |
1da177e4 LT |
1368 | return; |
1369 | } | |
c6d61269 | 1370 | if (port->serial == NULL || |
41ad427d | 1371 | (serial_priv = usb_get_serial_data(port->serial)) == NULL) { |
194343d9 GKH |
1372 | dev_err(&port->dev, "%s: serial is bad or serial->private " |
1373 | "is NULL, status=%d\n", __func__, status); | |
1da177e4 LT |
1374 | return; |
1375 | } | |
1376 | ||
1377 | /* do not resubmit urb if it has any status error */ | |
85d75107 | 1378 | if (status) { |
194343d9 GKH |
1379 | dev_err(&port->dev, |
1380 | "%s: nonzero read bulk status: status=%d, port=%d\n", | |
1381 | __func__, status, priv->dp_port_num); | |
1da177e4 LT |
1382 | return; |
1383 | } | |
1384 | ||
1385 | /* handle oob or inb callback, do not resubmit if error */ | |
c6d61269 AC |
1386 | if (priv->dp_port_num == serial_priv->ds_oob_port_num) { |
1387 | if (digi_read_oob_callback(urb) != 0) | |
1da177e4 LT |
1388 | return; |
1389 | } else { | |
c6d61269 | 1390 | if (digi_read_inb_callback(urb) != 0) |
1da177e4 LT |
1391 | return; |
1392 | } | |
1393 | ||
1394 | /* continue read */ | |
41ad427d | 1395 | ret = usb_submit_urb(urb, GFP_ATOMIC); |
1f87158e | 1396 | if (ret != 0 && ret != -EPERM) { |
194343d9 GKH |
1397 | dev_err(&port->dev, |
1398 | "%s: failed resubmitting urb, ret=%d, port=%d\n", | |
1399 | __func__, ret, priv->dp_port_num); | |
1da177e4 LT |
1400 | } |
1401 | ||
1402 | } | |
1403 | ||
41ad427d AC |
1404 | /* |
1405 | * Digi Read INB Callback | |
1406 | * | |
1407 | * Digi Read INB Callback handles reads on the in band ports, sending | |
1408 | * the data on to the tty subsystem. When called we know port and | |
1409 | * port->private are not NULL and port->serial has been validated. | |
1410 | * It returns 0 if successful, 1 if successful but the port is | |
1411 | * throttled, and -1 if the sanity checks failed. | |
1412 | */ | |
1da177e4 | 1413 | |
c6d61269 | 1414 | static int digi_read_inb_callback(struct urb *urb) |
1da177e4 LT |
1415 | { |
1416 | ||
cdc97792 | 1417 | struct usb_serial_port *port = urb->context; |
4a90f09b | 1418 | struct tty_struct *tty; |
1da177e4 LT |
1419 | struct digi_port *priv = usb_get_serial_port_data(port); |
1420 | int opcode = ((unsigned char *)urb->transfer_buffer)[0]; | |
1421 | int len = ((unsigned char *)urb->transfer_buffer)[1]; | |
85d75107 | 1422 | int port_status = ((unsigned char *)urb->transfer_buffer)[2]; |
41ad427d AC |
1423 | unsigned char *data = ((unsigned char *)urb->transfer_buffer) + 3; |
1424 | int flag, throttled; | |
85d75107 | 1425 | int status = urb->status; |
1da177e4 LT |
1426 | |
1427 | /* do not process callbacks on closed ports */ | |
1428 | /* but do continue the read chain */ | |
1f87158e | 1429 | if (urb->status == -ENOENT) |
c6d61269 | 1430 | return 0; |
1da177e4 LT |
1431 | |
1432 | /* short/multiple packet check */ | |
c6d61269 | 1433 | if (urb->actual_length != len + 2) { |
194343d9 | 1434 | dev_err(&port->dev, "%s: INCOMPLETE OR MULTIPLE PACKET, " |
50de36f7 | 1435 | "status=%d, port=%d, opcode=%d, len=%d, " |
194343d9 GKH |
1436 | "actual_length=%d, status=%d\n", __func__, status, |
1437 | priv->dp_port_num, opcode, len, urb->actual_length, | |
1438 | port_status); | |
c6d61269 | 1439 | return -1; |
1da177e4 LT |
1440 | } |
1441 | ||
4a90f09b | 1442 | tty = tty_port_tty_get(&port->port); |
c6d61269 | 1443 | spin_lock(&priv->dp_port_lock); |
1da177e4 LT |
1444 | |
1445 | /* check for throttle; if set, do not resubmit read urb */ | |
1446 | /* indicate the read chain needs to be restarted on unthrottle */ | |
1447 | throttled = priv->dp_throttled; | |
c6d61269 | 1448 | if (throttled) |
1da177e4 LT |
1449 | priv->dp_throttle_restart = 1; |
1450 | ||
1451 | /* receive data */ | |
4287341d | 1452 | if (tty && opcode == DIGI_CMD_RECEIVE_DATA) { |
85d75107 | 1453 | /* get flag from port_status */ |
1da177e4 LT |
1454 | flag = 0; |
1455 | ||
1456 | /* overrun is special, not associated with a char */ | |
c6d61269 AC |
1457 | if (port_status & DIGI_OVERRUN_ERROR) |
1458 | tty_insert_flip_char(tty, 0, TTY_OVERRUN); | |
1da177e4 LT |
1459 | |
1460 | /* break takes precedence over parity, */ | |
1461 | /* which takes precedence over framing errors */ | |
c6d61269 | 1462 | if (port_status & DIGI_BREAK_ERROR) |
1da177e4 | 1463 | flag = TTY_BREAK; |
c6d61269 | 1464 | else if (port_status & DIGI_PARITY_ERROR) |
1da177e4 | 1465 | flag = TTY_PARITY; |
c6d61269 | 1466 | else if (port_status & DIGI_FRAMING_ERROR) |
1da177e4 | 1467 | flag = TTY_FRAME; |
1da177e4 | 1468 | |
85d75107 | 1469 | /* data length is len-1 (one byte of len is port_status) */ |
1da177e4 | 1470 | --len; |
c6d61269 | 1471 | if (len > 0) { |
70ced221 JH |
1472 | tty_insert_flip_string_fixed_flag(tty, data, flag, |
1473 | len); | |
c6d61269 | 1474 | tty_flip_buffer_push(tty); |
1da177e4 | 1475 | } |
1da177e4 | 1476 | } |
c6d61269 | 1477 | spin_unlock(&priv->dp_port_lock); |
4a90f09b | 1478 | tty_kref_put(tty); |
1da177e4 | 1479 | |
c6d61269 | 1480 | if (opcode == DIGI_CMD_RECEIVE_DISABLE) |
441b62c1 | 1481 | dbg("%s: got RECEIVE_DISABLE", __func__); |
c6d61269 | 1482 | else if (opcode != DIGI_CMD_RECEIVE_DATA) |
441b62c1 | 1483 | dbg("%s: unknown opcode: %d", __func__, opcode); |
1da177e4 | 1484 | |
41ad427d | 1485 | return throttled ? 1 : 0; |
1da177e4 LT |
1486 | |
1487 | } | |
1488 | ||
1489 | ||
41ad427d AC |
1490 | /* |
1491 | * Digi Read OOB Callback | |
1492 | * | |
1493 | * Digi Read OOB Callback handles reads on the out of band port. | |
1494 | * When called we know port and port->private are not NULL and | |
1495 | * the port->serial is valid. It returns 0 if successful, and | |
1496 | * -1 if the sanity checks failed. | |
1497 | */ | |
1da177e4 | 1498 | |
c6d61269 | 1499 | static int digi_read_oob_callback(struct urb *urb) |
1da177e4 LT |
1500 | { |
1501 | ||
cdc97792 | 1502 | struct usb_serial_port *port = urb->context; |
1da177e4 | 1503 | struct usb_serial *serial = port->serial; |
4a90f09b | 1504 | struct tty_struct *tty; |
1da177e4 LT |
1505 | struct digi_port *priv = usb_get_serial_port_data(port); |
1506 | int opcode, line, status, val; | |
1507 | int i; | |
41ad427d | 1508 | unsigned int rts; |
1da177e4 | 1509 | |
c6d61269 AC |
1510 | dbg("digi_read_oob_callback: port=%d, len=%d", |
1511 | priv->dp_port_num, urb->actual_length); | |
1da177e4 LT |
1512 | |
1513 | /* handle each oob command */ | |
41ad427d | 1514 | for (i = 0; i < urb->actual_length - 3;) { |
1da177e4 LT |
1515 | opcode = ((unsigned char *)urb->transfer_buffer)[i++]; |
1516 | line = ((unsigned char *)urb->transfer_buffer)[i++]; | |
1517 | status = ((unsigned char *)urb->transfer_buffer)[i++]; | |
1518 | val = ((unsigned char *)urb->transfer_buffer)[i++]; | |
1519 | ||
c6d61269 AC |
1520 | dbg("digi_read_oob_callback: opcode=%d, line=%d, status=%d, val=%d", |
1521 | opcode, line, status, val); | |
1da177e4 | 1522 | |
c6d61269 | 1523 | if (status != 0 || line >= serial->type->num_ports) |
1da177e4 LT |
1524 | continue; |
1525 | ||
1526 | port = serial->port[line]; | |
1527 | ||
41ad427d AC |
1528 | priv = usb_get_serial_port_data(port); |
1529 | if (priv == NULL) | |
1da177e4 LT |
1530 | return -1; |
1531 | ||
4a90f09b | 1532 | tty = tty_port_tty_get(&port->port); |
4287341d | 1533 | |
41ad427d | 1534 | rts = 0; |
4287341d AC |
1535 | if (tty) |
1536 | rts = tty->termios->c_cflag & CRTSCTS; | |
4a90f09b | 1537 | |
4287341d | 1538 | if (tty && opcode == DIGI_CMD_READ_INPUT_SIGNALS) { |
c6d61269 | 1539 | spin_lock(&priv->dp_port_lock); |
1da177e4 | 1540 | /* convert from digi flags to termiox flags */ |
c6d61269 | 1541 | if (val & DIGI_READ_INPUT_SIGNALS_CTS) { |
1da177e4 LT |
1542 | priv->dp_modem_signals |= TIOCM_CTS; |
1543 | /* port must be open to use tty struct */ | |
41ad427d | 1544 | if (rts) { |
4a90f09b | 1545 | tty->hw_stopped = 0; |
c6d61269 | 1546 | digi_wakeup_write(port); |
1da177e4 LT |
1547 | } |
1548 | } else { | |
1549 | priv->dp_modem_signals &= ~TIOCM_CTS; | |
1550 | /* port must be open to use tty struct */ | |
41ad427d | 1551 | if (rts) |
4a90f09b | 1552 | tty->hw_stopped = 1; |
1da177e4 | 1553 | } |
c6d61269 | 1554 | if (val & DIGI_READ_INPUT_SIGNALS_DSR) |
1da177e4 LT |
1555 | priv->dp_modem_signals |= TIOCM_DSR; |
1556 | else | |
1557 | priv->dp_modem_signals &= ~TIOCM_DSR; | |
c6d61269 | 1558 | if (val & DIGI_READ_INPUT_SIGNALS_RI) |
1da177e4 LT |
1559 | priv->dp_modem_signals |= TIOCM_RI; |
1560 | else | |
1561 | priv->dp_modem_signals &= ~TIOCM_RI; | |
c6d61269 | 1562 | if (val & DIGI_READ_INPUT_SIGNALS_DCD) |
1da177e4 LT |
1563 | priv->dp_modem_signals |= TIOCM_CD; |
1564 | else | |
1565 | priv->dp_modem_signals &= ~TIOCM_CD; | |
1566 | ||
c6d61269 AC |
1567 | wake_up_interruptible(&priv->dp_modem_change_wait); |
1568 | spin_unlock(&priv->dp_port_lock); | |
1569 | } else if (opcode == DIGI_CMD_TRANSMIT_IDLE) { | |
1570 | spin_lock(&priv->dp_port_lock); | |
1da177e4 | 1571 | priv->dp_transmit_idle = 1; |
c6d61269 AC |
1572 | wake_up_interruptible(&priv->dp_transmit_idle_wait); |
1573 | spin_unlock(&priv->dp_port_lock); | |
1574 | } else if (opcode == DIGI_CMD_IFLUSH_FIFO) { | |
1575 | wake_up_interruptible(&priv->dp_flush_wait); | |
1da177e4 | 1576 | } |
4a90f09b | 1577 | tty_kref_put(tty); |
1da177e4 | 1578 | } |
c6d61269 | 1579 | return 0; |
1da177e4 LT |
1580 | |
1581 | } | |
1582 | ||
c6d61269 | 1583 | static int __init digi_init(void) |
1da177e4 LT |
1584 | { |
1585 | int retval; | |
1586 | retval = usb_serial_register(&digi_acceleport_2_device); | |
1587 | if (retval) | |
1588 | goto failed_acceleport_2_device; | |
1589 | retval = usb_serial_register(&digi_acceleport_4_device); | |
41ad427d | 1590 | if (retval) |
1da177e4 LT |
1591 | goto failed_acceleport_4_device; |
1592 | retval = usb_register(&digi_driver); | |
1593 | if (retval) | |
1594 | goto failed_usb_register; | |
c197a8db GKH |
1595 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" |
1596 | DRIVER_DESC "\n"); | |
1da177e4 LT |
1597 | return 0; |
1598 | failed_usb_register: | |
1599 | usb_serial_deregister(&digi_acceleport_4_device); | |
1600 | failed_acceleport_4_device: | |
1601 | usb_serial_deregister(&digi_acceleport_2_device); | |
1602 | failed_acceleport_2_device: | |
1603 | return retval; | |
1604 | } | |
1605 | ||
1da177e4 LT |
1606 | static void __exit digi_exit (void) |
1607 | { | |
c6d61269 AC |
1608 | usb_deregister(&digi_driver); |
1609 | usb_serial_deregister(&digi_acceleport_2_device); | |
1610 | usb_serial_deregister(&digi_acceleport_4_device); | |
1da177e4 LT |
1611 | } |
1612 | ||
1613 | ||
1614 | module_init(digi_init); | |
1615 | module_exit(digi_exit); | |
1616 | ||
1617 | ||
c6d61269 AC |
1618 | MODULE_AUTHOR(DRIVER_AUTHOR); |
1619 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 LT |
1620 | MODULE_LICENSE("GPL"); |
1621 | ||
1622 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
1623 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |