Commit | Line | Data |
---|---|---|
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 | 273 | |
1da177e4 LT |
274 | /* device info needed for the Digi serial converter */ |
275 | ||
ea65370d | 276 | static struct usb_serial_driver digi_acceleport_2_device = { |
18fcac35 | 277 | .driver = { |
269bda1c GKH |
278 | .owner = THIS_MODULE, |
279 | .name = "digi_2", | |
18fcac35 | 280 | }, |
269bda1c | 281 | .description = "Digi 2 port USB adapter", |
1da177e4 | 282 | .id_table = id_table_2, |
1da177e4 LT |
283 | .num_ports = 3, |
284 | .open = digi_open, | |
285 | .close = digi_close, | |
335f8514 | 286 | .dtr_rts = digi_dtr_rts, |
1da177e4 LT |
287 | .write = digi_write, |
288 | .write_room = digi_write_room, | |
289 | .write_bulk_callback = digi_write_bulk_callback, | |
290 | .read_bulk_callback = digi_read_bulk_callback, | |
291 | .chars_in_buffer = digi_chars_in_buffer, | |
292 | .throttle = digi_rx_throttle, | |
293 | .unthrottle = digi_rx_unthrottle, | |
1da177e4 LT |
294 | .set_termios = digi_set_termios, |
295 | .break_ctl = digi_break_ctl, | |
296 | .tiocmget = digi_tiocmget, | |
297 | .tiocmset = digi_tiocmset, | |
298 | .attach = digi_startup, | |
f9c99bb8 AS |
299 | .disconnect = digi_disconnect, |
300 | .release = digi_release, | |
1da177e4 LT |
301 | }; |
302 | ||
ea65370d | 303 | static struct usb_serial_driver digi_acceleport_4_device = { |
18fcac35 | 304 | .driver = { |
269bda1c GKH |
305 | .owner = THIS_MODULE, |
306 | .name = "digi_4", | |
18fcac35 | 307 | }, |
269bda1c | 308 | .description = "Digi 4 port USB adapter", |
1da177e4 | 309 | .id_table = id_table_4, |
1da177e4 LT |
310 | .num_ports = 4, |
311 | .open = digi_open, | |
312 | .close = digi_close, | |
313 | .write = digi_write, | |
314 | .write_room = digi_write_room, | |
315 | .write_bulk_callback = digi_write_bulk_callback, | |
316 | .read_bulk_callback = digi_read_bulk_callback, | |
317 | .chars_in_buffer = digi_chars_in_buffer, | |
318 | .throttle = digi_rx_throttle, | |
319 | .unthrottle = digi_rx_unthrottle, | |
1da177e4 LT |
320 | .set_termios = digi_set_termios, |
321 | .break_ctl = digi_break_ctl, | |
322 | .tiocmget = digi_tiocmget, | |
323 | .tiocmset = digi_tiocmset, | |
324 | .attach = digi_startup, | |
f9c99bb8 AS |
325 | .disconnect = digi_disconnect, |
326 | .release = digi_release, | |
1da177e4 LT |
327 | }; |
328 | ||
97b6b6d2 AS |
329 | static struct usb_serial_driver * const serial_drivers[] = { |
330 | &digi_acceleport_2_device, &digi_acceleport_4_device, NULL | |
331 | }; | |
1da177e4 LT |
332 | |
333 | /* Functions */ | |
334 | ||
335 | /* | |
41ad427d AC |
336 | * Cond Wait Interruptible Timeout Irqrestore |
337 | * | |
338 | * Do spin_unlock_irqrestore and interruptible_sleep_on_timeout | |
339 | * so that wake ups are not lost if they occur between the unlock | |
340 | * and the sleep. In other words, spin_unlock_irqrestore and | |
341 | * interruptible_sleep_on_timeout are "atomic" with respect to | |
342 | * wake ups. This is used to implement condition variables. | |
343 | * | |
344 | * interruptible_sleep_on_timeout is deprecated and has been replaced | |
345 | * with the equivalent code. | |
346 | */ | |
1da177e4 | 347 | |
c6d61269 | 348 | static long cond_wait_interruptible_timeout_irqrestore( |
1da177e4 | 349 | wait_queue_head_t *q, long timeout, |
c6d61269 | 350 | spinlock_t *lock, unsigned long flags) |
5a33956a | 351 | __releases(lock) |
1da177e4 LT |
352 | { |
353 | DEFINE_WAIT(wait); | |
354 | ||
45f23f18 | 355 | prepare_to_wait(q, &wait, TASK_INTERRUPTIBLE); |
1da177e4 LT |
356 | spin_unlock_irqrestore(lock, flags); |
357 | timeout = schedule_timeout(timeout); | |
358 | finish_wait(q, &wait); | |
359 | ||
360 | return timeout; | |
1da177e4 LT |
361 | } |
362 | ||
363 | ||
364 | /* | |
41ad427d AC |
365 | * Digi Wakeup Write |
366 | * | |
367 | * Wake up port, line discipline, and tty processes sleeping | |
368 | * on writes. | |
369 | */ | |
1da177e4 | 370 | |
c4028958 | 371 | static void digi_wakeup_write_lock(struct work_struct *work) |
1da177e4 | 372 | { |
41ad427d AC |
373 | struct digi_port *priv = |
374 | container_of(work, struct digi_port, dp_wakeup_work); | |
c4028958 | 375 | struct usb_serial_port *port = priv->dp_port; |
1da177e4 | 376 | unsigned long flags; |
1da177e4 | 377 | |
c6d61269 AC |
378 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
379 | digi_wakeup_write(port); | |
380 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); | |
1da177e4 LT |
381 | } |
382 | ||
c6d61269 | 383 | static void digi_wakeup_write(struct usb_serial_port *port) |
1da177e4 | 384 | { |
4a90f09b | 385 | struct tty_struct *tty = tty_port_tty_get(&port->port); |
4287341d AC |
386 | if (tty) { |
387 | tty_wakeup(tty); | |
388 | tty_kref_put(tty); | |
389 | } | |
1da177e4 LT |
390 | } |
391 | ||
392 | ||
393 | /* | |
41ad427d AC |
394 | * Digi Write OOB Command |
395 | * | |
396 | * Write commands on the out of band port. Commands are 4 | |
397 | * bytes each, multiple commands can be sent at once, and | |
398 | * no command will be split across USB packets. Returns 0 | |
399 | * if successful, -EINTR if interrupted while sleeping and | |
400 | * the interruptible flag is true, or a negative error | |
401 | * returned by usb_submit_urb. | |
402 | */ | |
1da177e4 | 403 | |
c6d61269 AC |
404 | static int digi_write_oob_command(struct usb_serial_port *port, |
405 | unsigned char *buf, int count, int interruptible) | |
1da177e4 LT |
406 | { |
407 | ||
408 | int ret = 0; | |
409 | int len; | |
410 | struct usb_serial_port *oob_port = (struct usb_serial_port *)((struct digi_serial *)(usb_get_serial_data(port->serial)))->ds_oob_port; | |
411 | struct digi_port *oob_priv = usb_get_serial_port_data(oob_port); | |
412 | unsigned long flags = 0; | |
413 | ||
c6d61269 | 414 | dbg("digi_write_oob_command: TOP: port=%d, count=%d", oob_priv->dp_port_num, count); |
1da177e4 | 415 | |
c6d61269 | 416 | spin_lock_irqsave(&oob_priv->dp_port_lock, flags); |
41ad427d | 417 | while (count > 0) { |
50de36f7 | 418 | while (oob_priv->dp_write_urb_in_use) { |
1da177e4 LT |
419 | cond_wait_interruptible_timeout_irqrestore( |
420 | &oob_port->write_wait, DIGI_RETRY_TIMEOUT, | |
c6d61269 AC |
421 | &oob_priv->dp_port_lock, flags); |
422 | if (interruptible && signal_pending(current)) | |
423 | return -EINTR; | |
424 | spin_lock_irqsave(&oob_priv->dp_port_lock, flags); | |
1da177e4 LT |
425 | } |
426 | ||
427 | /* len must be a multiple of 4, so commands are not split */ | |
c6d61269 AC |
428 | len = min(count, oob_port->bulk_out_size); |
429 | if (len > 4) | |
1da177e4 | 430 | len &= ~3; |
c6d61269 | 431 | memcpy(oob_port->write_urb->transfer_buffer, buf, len); |
1da177e4 | 432 | oob_port->write_urb->transfer_buffer_length = len; |
41ad427d AC |
433 | ret = usb_submit_urb(oob_port->write_urb, GFP_ATOMIC); |
434 | if (ret == 0) { | |
1da177e4 LT |
435 | oob_priv->dp_write_urb_in_use = 1; |
436 | count -= len; | |
437 | buf += len; | |
438 | } | |
1da177e4 | 439 | } |
c6d61269 AC |
440 | spin_unlock_irqrestore(&oob_priv->dp_port_lock, flags); |
441 | if (ret) | |
194343d9 GKH |
442 | dev_err(&port->dev, "%s: usb_submit_urb failed, ret=%d\n", |
443 | __func__, ret); | |
c6d61269 | 444 | return ret; |
1da177e4 LT |
445 | |
446 | } | |
447 | ||
448 | ||
449 | /* | |
41ad427d AC |
450 | * Digi Write In Band Command |
451 | * | |
452 | * Write commands on the given port. Commands are 4 | |
453 | * bytes each, multiple commands can be sent at once, and | |
454 | * no command will be split across USB packets. If timeout | |
455 | * is non-zero, write in band command will return after | |
456 | * waiting unsuccessfully for the URB status to clear for | |
457 | * timeout ticks. Returns 0 if successful, or a negative | |
458 | * error returned by digi_write. | |
459 | */ | |
1da177e4 | 460 | |
c6d61269 AC |
461 | static int digi_write_inb_command(struct usb_serial_port *port, |
462 | unsigned char *buf, int count, unsigned long timeout) | |
1da177e4 | 463 | { |
1da177e4 LT |
464 | int ret = 0; |
465 | int len; | |
466 | struct digi_port *priv = usb_get_serial_port_data(port); | |
467 | unsigned char *data = port->write_urb->transfer_buffer; | |
468 | unsigned long flags = 0; | |
469 | ||
c6d61269 AC |
470 | dbg("digi_write_inb_command: TOP: port=%d, count=%d", |
471 | priv->dp_port_num, count); | |
1da177e4 | 472 | |
c6d61269 | 473 | if (timeout) |
1da177e4 LT |
474 | timeout += jiffies; |
475 | else | |
476 | timeout = ULONG_MAX; | |
477 | ||
c6d61269 | 478 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
41ad427d | 479 | while (count > 0 && ret == 0) { |
50de36f7 GKH |
480 | while (priv->dp_write_urb_in_use && |
481 | time_before(jiffies, timeout)) { | |
1da177e4 LT |
482 | cond_wait_interruptible_timeout_irqrestore( |
483 | &port->write_wait, DIGI_RETRY_TIMEOUT, | |
c6d61269 AC |
484 | &priv->dp_port_lock, flags); |
485 | if (signal_pending(current)) | |
486 | return -EINTR; | |
487 | spin_lock_irqsave(&priv->dp_port_lock, flags); | |
1da177e4 LT |
488 | } |
489 | ||
490 | /* len must be a multiple of 4 and small enough to */ | |
491 | /* guarantee the write will send buffered data first, */ | |
492 | /* so commands are in order with data and not split */ | |
c6d61269 AC |
493 | len = min(count, port->bulk_out_size-2-priv->dp_out_buf_len); |
494 | if (len > 4) | |
1da177e4 LT |
495 | len &= ~3; |
496 | ||
497 | /* write any buffered data first */ | |
c6d61269 | 498 | if (priv->dp_out_buf_len > 0) { |
1da177e4 LT |
499 | data[0] = DIGI_CMD_SEND_DATA; |
500 | data[1] = priv->dp_out_buf_len; | |
c6d61269 AC |
501 | memcpy(data + 2, priv->dp_out_buf, |
502 | priv->dp_out_buf_len); | |
503 | memcpy(data + 2 + priv->dp_out_buf_len, buf, len); | |
1da177e4 | 504 | port->write_urb->transfer_buffer_length |
c6d61269 | 505 | = priv->dp_out_buf_len + 2 + len; |
1da177e4 | 506 | } else { |
c6d61269 | 507 | memcpy(data, buf, len); |
1da177e4 LT |
508 | port->write_urb->transfer_buffer_length = len; |
509 | } | |
1da177e4 | 510 | |
41ad427d AC |
511 | ret = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
512 | if (ret == 0) { | |
1da177e4 LT |
513 | priv->dp_write_urb_in_use = 1; |
514 | priv->dp_out_buf_len = 0; | |
515 | count -= len; | |
516 | buf += len; | |
517 | } | |
518 | ||
519 | } | |
c6d61269 | 520 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
1da177e4 | 521 | |
c6d61269 | 522 | if (ret) |
194343d9 GKH |
523 | dev_err(&port->dev, |
524 | "%s: usb_submit_urb failed, ret=%d, port=%d\n", | |
441b62c1 | 525 | __func__, ret, priv->dp_port_num); |
c6d61269 | 526 | return ret; |
1da177e4 LT |
527 | } |
528 | ||
529 | ||
530 | /* | |
41ad427d AC |
531 | * Digi Set Modem Signals |
532 | * | |
533 | * Sets or clears DTR and RTS on the port, according to the | |
534 | * modem_signals argument. Use TIOCM_DTR and TIOCM_RTS flags | |
535 | * for the modem_signals argument. Returns 0 if successful, | |
536 | * -EINTR if interrupted while sleeping, or a non-zero error | |
537 | * returned by usb_submit_urb. | |
538 | */ | |
1da177e4 | 539 | |
c6d61269 AC |
540 | static int digi_set_modem_signals(struct usb_serial_port *port, |
541 | unsigned int modem_signals, int interruptible) | |
1da177e4 LT |
542 | { |
543 | ||
544 | int ret; | |
545 | struct digi_port *port_priv = usb_get_serial_port_data(port); | |
41ad427d | 546 | struct usb_serial_port *oob_port = (struct usb_serial_port *) ((struct digi_serial *)(usb_get_serial_data(port->serial)))->ds_oob_port; |
1da177e4 LT |
547 | struct digi_port *oob_priv = usb_get_serial_port_data(oob_port); |
548 | unsigned char *data = oob_port->write_urb->transfer_buffer; | |
549 | unsigned long flags = 0; | |
550 | ||
551 | ||
c6d61269 AC |
552 | dbg("digi_set_modem_signals: TOP: port=%d, modem_signals=0x%x", |
553 | port_priv->dp_port_num, modem_signals); | |
1da177e4 | 554 | |
c6d61269 AC |
555 | spin_lock_irqsave(&oob_priv->dp_port_lock, flags); |
556 | spin_lock(&port_priv->dp_port_lock); | |
1da177e4 | 557 | |
50de36f7 | 558 | while (oob_priv->dp_write_urb_in_use) { |
c6d61269 | 559 | spin_unlock(&port_priv->dp_port_lock); |
1da177e4 LT |
560 | cond_wait_interruptible_timeout_irqrestore( |
561 | &oob_port->write_wait, DIGI_RETRY_TIMEOUT, | |
c6d61269 AC |
562 | &oob_priv->dp_port_lock, flags); |
563 | if (interruptible && signal_pending(current)) | |
564 | return -EINTR; | |
565 | spin_lock_irqsave(&oob_priv->dp_port_lock, flags); | |
566 | spin_lock(&port_priv->dp_port_lock); | |
1da177e4 | 567 | } |
1da177e4 LT |
568 | data[0] = DIGI_CMD_SET_DTR_SIGNAL; |
569 | data[1] = port_priv->dp_port_num; | |
41ad427d AC |
570 | data[2] = (modem_signals & TIOCM_DTR) ? |
571 | DIGI_DTR_ACTIVE : DIGI_DTR_INACTIVE; | |
1da177e4 | 572 | data[3] = 0; |
1da177e4 LT |
573 | data[4] = DIGI_CMD_SET_RTS_SIGNAL; |
574 | data[5] = port_priv->dp_port_num; | |
41ad427d AC |
575 | data[6] = (modem_signals & TIOCM_RTS) ? |
576 | DIGI_RTS_ACTIVE : DIGI_RTS_INACTIVE; | |
1da177e4 LT |
577 | data[7] = 0; |
578 | ||
579 | oob_port->write_urb->transfer_buffer_length = 8; | |
1da177e4 | 580 | |
41ad427d AC |
581 | ret = usb_submit_urb(oob_port->write_urb, GFP_ATOMIC); |
582 | if (ret == 0) { | |
1da177e4 LT |
583 | oob_priv->dp_write_urb_in_use = 1; |
584 | port_priv->dp_modem_signals = | |
585 | (port_priv->dp_modem_signals&~(TIOCM_DTR|TIOCM_RTS)) | |
586 | | (modem_signals&(TIOCM_DTR|TIOCM_RTS)); | |
587 | } | |
c6d61269 AC |
588 | spin_unlock(&port_priv->dp_port_lock); |
589 | spin_unlock_irqrestore(&oob_priv->dp_port_lock, flags); | |
590 | if (ret) | |
194343d9 GKH |
591 | dev_err(&port->dev, "%s: usb_submit_urb failed, ret=%d\n", |
592 | __func__, ret); | |
c6d61269 | 593 | return ret; |
1da177e4 LT |
594 | } |
595 | ||
1da177e4 | 596 | /* |
41ad427d AC |
597 | * Digi Transmit Idle |
598 | * | |
599 | * Digi transmit idle waits, up to timeout ticks, for the transmitter | |
600 | * to go idle. It returns 0 if successful or a negative error. | |
601 | * | |
602 | * There are race conditions here if more than one process is calling | |
603 | * digi_transmit_idle on the same port at the same time. However, this | |
604 | * is only called from close, and only one process can be in close on a | |
605 | * port at a time, so its ok. | |
606 | */ | |
1da177e4 | 607 | |
c6d61269 AC |
608 | static int digi_transmit_idle(struct usb_serial_port *port, |
609 | unsigned long timeout) | |
1da177e4 | 610 | { |
1da177e4 LT |
611 | int ret; |
612 | unsigned char buf[2]; | |
613 | struct digi_port *priv = usb_get_serial_port_data(port); | |
614 | unsigned long flags = 0; | |
615 | ||
c6d61269 | 616 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 | 617 | priv->dp_transmit_idle = 0; |
c6d61269 | 618 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
1da177e4 LT |
619 | |
620 | buf[0] = DIGI_CMD_TRANSMIT_IDLE; | |
621 | buf[1] = 0; | |
622 | ||
623 | timeout += jiffies; | |
624 | ||
41ad427d AC |
625 | ret = digi_write_inb_command(port, buf, 2, timeout - jiffies); |
626 | if (ret != 0) | |
c6d61269 | 627 | return ret; |
1da177e4 | 628 | |
c6d61269 | 629 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 | 630 | |
41ad427d | 631 | while (time_before(jiffies, timeout) && !priv->dp_transmit_idle) { |
1da177e4 LT |
632 | cond_wait_interruptible_timeout_irqrestore( |
633 | &priv->dp_transmit_idle_wait, DIGI_RETRY_TIMEOUT, | |
c6d61269 AC |
634 | &priv->dp_port_lock, flags); |
635 | if (signal_pending(current)) | |
636 | return -EINTR; | |
637 | spin_lock_irqsave(&priv->dp_port_lock, flags); | |
1da177e4 | 638 | } |
1da177e4 | 639 | priv->dp_transmit_idle = 0; |
c6d61269 AC |
640 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
641 | return 0; | |
1da177e4 LT |
642 | |
643 | } | |
644 | ||
645 | ||
95da310e | 646 | static void digi_rx_throttle(struct tty_struct *tty) |
1da177e4 | 647 | { |
1da177e4 | 648 | unsigned long flags; |
95da310e | 649 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
650 | struct digi_port *priv = usb_get_serial_port_data(port); |
651 | ||
1da177e4 | 652 | /* stop receiving characters by not resubmitting the read urb */ |
c6d61269 | 653 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 LT |
654 | priv->dp_throttled = 1; |
655 | priv->dp_throttle_restart = 0; | |
c6d61269 | 656 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
1da177e4 LT |
657 | } |
658 | ||
659 | ||
95da310e | 660 | static void digi_rx_unthrottle(struct tty_struct *tty) |
1da177e4 | 661 | { |
1da177e4 | 662 | int ret = 0; |
1da177e4 | 663 | unsigned long flags; |
95da310e | 664 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 665 | struct digi_port *priv = usb_get_serial_port_data(port); |
1da177e4 | 666 | |
c6d61269 | 667 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 | 668 | |
1da177e4 | 669 | /* restart read chain */ |
5833041f | 670 | if (priv->dp_throttle_restart) |
c6d61269 | 671 | ret = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
1da177e4 | 672 | |
ba6b702f JH |
673 | /* turn throttle off */ |
674 | priv->dp_throttled = 0; | |
675 | priv->dp_throttle_restart = 0; | |
676 | ||
c6d61269 | 677 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
1da177e4 | 678 | |
c6d61269 | 679 | if (ret) |
194343d9 GKH |
680 | dev_err(&port->dev, |
681 | "%s: usb_submit_urb failed, ret=%d, port=%d\n", | |
441b62c1 | 682 | __func__, ret, priv->dp_port_num); |
1da177e4 LT |
683 | } |
684 | ||
685 | ||
41ad427d | 686 | static void digi_set_termios(struct tty_struct *tty, |
95da310e | 687 | struct usb_serial_port *port, struct ktermios *old_termios) |
1da177e4 | 688 | { |
1da177e4 | 689 | struct digi_port *priv = usb_get_serial_port_data(port); |
c6d61269 AC |
690 | unsigned int iflag = tty->termios->c_iflag; |
691 | unsigned int cflag = tty->termios->c_cflag; | |
1da177e4 LT |
692 | unsigned int old_iflag = old_termios->c_iflag; |
693 | unsigned int old_cflag = old_termios->c_cflag; | |
694 | unsigned char buf[32]; | |
695 | unsigned int modem_signals; | |
41ad427d | 696 | int arg, ret; |
1da177e4 | 697 | int i = 0; |
c6d61269 | 698 | speed_t baud; |
1da177e4 | 699 | |
c6d61269 | 700 | 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 |
701 | |
702 | /* set baud rate */ | |
41ad427d AC |
703 | baud = tty_get_baud_rate(tty); |
704 | if (baud != tty_termios_baud_rate(old_termios)) { | |
1da177e4 LT |
705 | arg = -1; |
706 | ||
707 | /* reassert DTR and (maybe) RTS on transition from B0 */ | |
c6d61269 | 708 | if ((old_cflag&CBAUD) == B0) { |
1da177e4 LT |
709 | /* don't set RTS if using hardware flow control */ |
710 | /* and throttling input */ | |
711 | modem_signals = TIOCM_DTR; | |
c6d61269 AC |
712 | if (!(tty->termios->c_cflag & CRTSCTS) || |
713 | !test_bit(TTY_THROTTLED, &tty->flags)) | |
1da177e4 | 714 | modem_signals |= TIOCM_RTS; |
c6d61269 | 715 | digi_set_modem_signals(port, modem_signals, 1); |
1da177e4 | 716 | } |
c6d61269 | 717 | switch (baud) { |
41ad427d AC |
718 | /* drop DTR and RTS on transition to B0 */ |
719 | case 0: digi_set_modem_signals(port, 0, 1); break; | |
720 | case 50: arg = DIGI_BAUD_50; break; | |
721 | case 75: arg = DIGI_BAUD_75; break; | |
722 | case 110: arg = DIGI_BAUD_110; break; | |
723 | case 150: arg = DIGI_BAUD_150; break; | |
724 | case 200: arg = DIGI_BAUD_200; break; | |
725 | case 300: arg = DIGI_BAUD_300; break; | |
726 | case 600: arg = DIGI_BAUD_600; break; | |
727 | case 1200: arg = DIGI_BAUD_1200; break; | |
728 | case 1800: arg = DIGI_BAUD_1800; break; | |
729 | case 2400: arg = DIGI_BAUD_2400; break; | |
730 | case 4800: arg = DIGI_BAUD_4800; break; | |
731 | case 9600: arg = DIGI_BAUD_9600; break; | |
732 | case 19200: arg = DIGI_BAUD_19200; break; | |
733 | case 38400: arg = DIGI_BAUD_38400; break; | |
734 | case 57600: arg = DIGI_BAUD_57600; break; | |
735 | case 115200: arg = DIGI_BAUD_115200; break; | |
736 | case 230400: arg = DIGI_BAUD_230400; break; | |
737 | case 460800: arg = DIGI_BAUD_460800; break; | |
738 | default: | |
739 | arg = DIGI_BAUD_9600; | |
740 | baud = 9600; | |
741 | break; | |
1da177e4 | 742 | } |
c6d61269 | 743 | if (arg != -1) { |
1da177e4 LT |
744 | buf[i++] = DIGI_CMD_SET_BAUD_RATE; |
745 | buf[i++] = priv->dp_port_num; | |
746 | buf[i++] = arg; | |
747 | buf[i++] = 0; | |
748 | } | |
1da177e4 | 749 | } |
1da177e4 | 750 | /* set parity */ |
7fa36a99 AC |
751 | tty->termios->c_cflag &= ~CMSPAR; |
752 | ||
c6d61269 AC |
753 | if ((cflag&(PARENB|PARODD)) != (old_cflag&(PARENB|PARODD))) { |
754 | if (cflag&PARENB) { | |
755 | if (cflag&PARODD) | |
1da177e4 LT |
756 | arg = DIGI_PARITY_ODD; |
757 | else | |
758 | arg = DIGI_PARITY_EVEN; | |
759 | } else { | |
760 | arg = DIGI_PARITY_NONE; | |
761 | } | |
1da177e4 LT |
762 | buf[i++] = DIGI_CMD_SET_PARITY; |
763 | buf[i++] = priv->dp_port_num; | |
764 | buf[i++] = arg; | |
765 | buf[i++] = 0; | |
1da177e4 | 766 | } |
1da177e4 | 767 | /* set word size */ |
c6d61269 | 768 | if ((cflag&CSIZE) != (old_cflag&CSIZE)) { |
1da177e4 | 769 | arg = -1; |
c6d61269 | 770 | switch (cflag&CSIZE) { |
1da177e4 LT |
771 | case CS5: arg = DIGI_WORD_SIZE_5; break; |
772 | case CS6: arg = DIGI_WORD_SIZE_6; break; | |
773 | case CS7: arg = DIGI_WORD_SIZE_7; break; | |
774 | case CS8: arg = DIGI_WORD_SIZE_8; break; | |
775 | default: | |
c6d61269 AC |
776 | dbg("digi_set_termios: can't handle word size %d", |
777 | (cflag&CSIZE)); | |
1da177e4 LT |
778 | break; |
779 | } | |
780 | ||
c6d61269 | 781 | if (arg != -1) { |
1da177e4 LT |
782 | buf[i++] = DIGI_CMD_SET_WORD_SIZE; |
783 | buf[i++] = priv->dp_port_num; | |
784 | buf[i++] = arg; | |
785 | buf[i++] = 0; | |
786 | } | |
787 | ||
788 | } | |
789 | ||
790 | /* set stop bits */ | |
c6d61269 | 791 | if ((cflag&CSTOPB) != (old_cflag&CSTOPB)) { |
1da177e4 | 792 | |
c6d61269 | 793 | if ((cflag&CSTOPB)) |
1da177e4 LT |
794 | arg = DIGI_STOP_BITS_2; |
795 | else | |
796 | arg = DIGI_STOP_BITS_1; | |
797 | ||
798 | buf[i++] = DIGI_CMD_SET_STOP_BITS; | |
799 | buf[i++] = priv->dp_port_num; | |
800 | buf[i++] = arg; | |
801 | buf[i++] = 0; | |
802 | ||
803 | } | |
804 | ||
805 | /* set input flow control */ | |
c6d61269 AC |
806 | if ((iflag&IXOFF) != (old_iflag&IXOFF) |
807 | || (cflag&CRTSCTS) != (old_cflag&CRTSCTS)) { | |
1da177e4 | 808 | arg = 0; |
c6d61269 | 809 | if (iflag&IXOFF) |
1da177e4 LT |
810 | arg |= DIGI_INPUT_FLOW_CONTROL_XON_XOFF; |
811 | else | |
812 | arg &= ~DIGI_INPUT_FLOW_CONTROL_XON_XOFF; | |
813 | ||
c6d61269 | 814 | if (cflag&CRTSCTS) { |
1da177e4 LT |
815 | arg |= DIGI_INPUT_FLOW_CONTROL_RTS; |
816 | ||
817 | /* On USB-4 it is necessary to assert RTS prior */ | |
818 | /* to selecting RTS input flow control. */ | |
819 | buf[i++] = DIGI_CMD_SET_RTS_SIGNAL; | |
820 | buf[i++] = priv->dp_port_num; | |
821 | buf[i++] = DIGI_RTS_ACTIVE; | |
822 | buf[i++] = 0; | |
823 | ||
824 | } else { | |
825 | arg &= ~DIGI_INPUT_FLOW_CONTROL_RTS; | |
826 | } | |
1da177e4 LT |
827 | buf[i++] = DIGI_CMD_SET_INPUT_FLOW_CONTROL; |
828 | buf[i++] = priv->dp_port_num; | |
829 | buf[i++] = arg; | |
830 | buf[i++] = 0; | |
1da177e4 LT |
831 | } |
832 | ||
833 | /* set output flow control */ | |
7fa36a99 AC |
834 | if ((iflag & IXON) != (old_iflag & IXON) |
835 | || (cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { | |
1da177e4 | 836 | arg = 0; |
7fa36a99 | 837 | if (iflag & IXON) |
1da177e4 LT |
838 | arg |= DIGI_OUTPUT_FLOW_CONTROL_XON_XOFF; |
839 | else | |
840 | arg &= ~DIGI_OUTPUT_FLOW_CONTROL_XON_XOFF; | |
841 | ||
7fa36a99 | 842 | if (cflag & CRTSCTS) { |
1da177e4 LT |
843 | arg |= DIGI_OUTPUT_FLOW_CONTROL_CTS; |
844 | } else { | |
845 | arg &= ~DIGI_OUTPUT_FLOW_CONTROL_CTS; | |
c6d61269 | 846 | tty->hw_stopped = 0; |
1da177e4 LT |
847 | } |
848 | ||
849 | buf[i++] = DIGI_CMD_SET_OUTPUT_FLOW_CONTROL; | |
850 | buf[i++] = priv->dp_port_num; | |
851 | buf[i++] = arg; | |
852 | buf[i++] = 0; | |
1da177e4 LT |
853 | } |
854 | ||
855 | /* set receive enable/disable */ | |
7fa36a99 AC |
856 | if ((cflag & CREAD) != (old_cflag & CREAD)) { |
857 | if (cflag & CREAD) | |
1da177e4 LT |
858 | arg = DIGI_ENABLE; |
859 | else | |
860 | arg = DIGI_DISABLE; | |
861 | ||
862 | buf[i++] = DIGI_CMD_RECEIVE_ENABLE; | |
863 | buf[i++] = priv->dp_port_num; | |
864 | buf[i++] = arg; | |
865 | buf[i++] = 0; | |
1da177e4 | 866 | } |
41ad427d AC |
867 | ret = digi_write_oob_command(port, buf, i, 1); |
868 | if (ret != 0) | |
c6d61269 | 869 | dbg("digi_set_termios: write oob failed, ret=%d", ret); |
7fa36a99 | 870 | tty_encode_baud_rate(tty, baud, baud); |
1da177e4 LT |
871 | } |
872 | ||
873 | ||
95da310e | 874 | static void digi_break_ctl(struct tty_struct *tty, int break_state) |
1da177e4 | 875 | { |
95da310e | 876 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
877 | unsigned char buf[4]; |
878 | ||
1da177e4 LT |
879 | buf[0] = DIGI_CMD_BREAK_CONTROL; |
880 | buf[1] = 2; /* length */ | |
881 | buf[2] = break_state ? 1 : 0; | |
882 | buf[3] = 0; /* pad */ | |
c6d61269 | 883 | digi_write_inb_command(port, buf, 4, 0); |
1da177e4 LT |
884 | } |
885 | ||
886 | ||
60b33c13 | 887 | static int digi_tiocmget(struct tty_struct *tty) |
1da177e4 | 888 | { |
95da310e | 889 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
890 | struct digi_port *priv = usb_get_serial_port_data(port); |
891 | unsigned int val; | |
892 | unsigned long flags; | |
893 | ||
c6d61269 | 894 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 | 895 | val = priv->dp_modem_signals; |
c6d61269 | 896 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
1da177e4 LT |
897 | return val; |
898 | } | |
899 | ||
900 | ||
20b9d177 AC |
901 | static int digi_tiocmset(struct tty_struct *tty, |
902 | unsigned int set, unsigned int clear) | |
1da177e4 | 903 | { |
95da310e | 904 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
905 | struct digi_port *priv = usb_get_serial_port_data(port); |
906 | unsigned int val; | |
907 | unsigned long flags; | |
908 | ||
c6d61269 | 909 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 | 910 | val = (priv->dp_modem_signals & ~clear) | set; |
c6d61269 AC |
911 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
912 | return digi_set_modem_signals(port, val, 1); | |
1da177e4 LT |
913 | } |
914 | ||
915 | ||
95da310e AC |
916 | static int digi_write(struct tty_struct *tty, struct usb_serial_port *port, |
917 | const unsigned char *buf, int count) | |
1da177e4 LT |
918 | { |
919 | ||
41ad427d | 920 | int ret, data_len, new_len; |
1da177e4 LT |
921 | struct digi_port *priv = usb_get_serial_port_data(port); |
922 | unsigned char *data = port->write_urb->transfer_buffer; | |
923 | unsigned long flags = 0; | |
924 | ||
c6d61269 AC |
925 | dbg("digi_write: TOP: port=%d, count=%d, in_interrupt=%ld", |
926 | priv->dp_port_num, count, in_interrupt()); | |
1da177e4 LT |
927 | |
928 | /* copy user data (which can sleep) before getting spin lock */ | |
c6d61269 AC |
929 | count = min(count, port->bulk_out_size-2); |
930 | count = min(64, count); | |
1da177e4 LT |
931 | |
932 | /* be sure only one write proceeds at a time */ | |
933 | /* there are races on the port private buffer */ | |
c6d61269 | 934 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 LT |
935 | |
936 | /* wait for urb status clear to submit another urb */ | |
50de36f7 | 937 | if (priv->dp_write_urb_in_use) { |
1da177e4 | 938 | /* buffer data if count is 1 (probably put_char) if possible */ |
c6d61269 | 939 | if (count == 1 && priv->dp_out_buf_len < DIGI_OUT_BUF_SIZE) { |
1da177e4 LT |
940 | priv->dp_out_buf[priv->dp_out_buf_len++] = *buf; |
941 | new_len = 1; | |
942 | } else { | |
943 | new_len = 0; | |
944 | } | |
c6d61269 AC |
945 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
946 | return new_len; | |
1da177e4 LT |
947 | } |
948 | ||
949 | /* allow space for any buffered data and for new data, up to */ | |
950 | /* transfer buffer size - 2 (for command and length bytes) */ | |
951 | new_len = min(count, port->bulk_out_size-2-priv->dp_out_buf_len); | |
952 | data_len = new_len + priv->dp_out_buf_len; | |
953 | ||
c6d61269 AC |
954 | if (data_len == 0) { |
955 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); | |
956 | return 0; | |
1da177e4 LT |
957 | } |
958 | ||
959 | port->write_urb->transfer_buffer_length = data_len+2; | |
1da177e4 LT |
960 | |
961 | *data++ = DIGI_CMD_SEND_DATA; | |
962 | *data++ = data_len; | |
963 | ||
964 | /* copy in buffered data first */ | |
c6d61269 | 965 | memcpy(data, priv->dp_out_buf, priv->dp_out_buf_len); |
1da177e4 LT |
966 | data += priv->dp_out_buf_len; |
967 | ||
968 | /* copy in new data */ | |
c6d61269 | 969 | memcpy(data, buf, new_len); |
1da177e4 | 970 | |
41ad427d AC |
971 | ret = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
972 | if (ret == 0) { | |
1da177e4 LT |
973 | priv->dp_write_urb_in_use = 1; |
974 | ret = new_len; | |
975 | priv->dp_out_buf_len = 0; | |
976 | } | |
977 | ||
978 | /* return length of new data written, or error */ | |
c6d61269 AC |
979 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
980 | if (ret < 0) | |
22a416c4 | 981 | dev_err_console(port, |
194343d9 | 982 | "%s: usb_submit_urb failed, ret=%d, port=%d\n", |
441b62c1 | 983 | __func__, ret, priv->dp_port_num); |
c6d61269 AC |
984 | dbg("digi_write: returning %d", ret); |
985 | return ret; | |
1da177e4 | 986 | |
41ad427d | 987 | } |
1da177e4 | 988 | |
c6d61269 | 989 | static void digi_write_bulk_callback(struct urb *urb) |
1da177e4 LT |
990 | { |
991 | ||
cdc97792 | 992 | struct usb_serial_port *port = urb->context; |
1da177e4 LT |
993 | struct usb_serial *serial; |
994 | struct digi_port *priv; | |
995 | struct digi_serial *serial_priv; | |
996 | int ret = 0; | |
85d75107 | 997 | int status = urb->status; |
1da177e4 | 998 | |
1da177e4 | 999 | /* port and serial sanity check */ |
41ad427d | 1000 | if (port == NULL || (priv = usb_get_serial_port_data(port)) == NULL) { |
109f34e7 | 1001 | pr_err("%s: port or port->private is NULL, status=%d\n", |
194343d9 | 1002 | __func__, status); |
1da177e4 LT |
1003 | return; |
1004 | } | |
1005 | serial = port->serial; | |
41ad427d | 1006 | if (serial == NULL || (serial_priv = usb_get_serial_data(serial)) == NULL) { |
194343d9 GKH |
1007 | dev_err(&port->dev, |
1008 | "%s: serial or serial->private is NULL, status=%d\n", | |
1009 | __func__, status); | |
1da177e4 LT |
1010 | return; |
1011 | } | |
1012 | ||
1013 | /* handle oob callback */ | |
c6d61269 AC |
1014 | if (priv->dp_port_num == serial_priv->ds_oob_port_num) { |
1015 | dbg("digi_write_bulk_callback: oob callback"); | |
1016 | spin_lock(&priv->dp_port_lock); | |
1da177e4 | 1017 | priv->dp_write_urb_in_use = 0; |
c6d61269 AC |
1018 | wake_up_interruptible(&port->write_wait); |
1019 | spin_unlock(&priv->dp_port_lock); | |
1da177e4 LT |
1020 | return; |
1021 | } | |
1022 | ||
1f87158e | 1023 | /* try to send any buffered data on this port */ |
c6d61269 | 1024 | spin_lock(&priv->dp_port_lock); |
1da177e4 | 1025 | priv->dp_write_urb_in_use = 0; |
1f87158e | 1026 | if (priv->dp_out_buf_len > 0) { |
1da177e4 LT |
1027 | *((unsigned char *)(port->write_urb->transfer_buffer)) |
1028 | = (unsigned char)DIGI_CMD_SEND_DATA; | |
41ad427d | 1029 | *((unsigned char *)(port->write_urb->transfer_buffer) + 1) |
1da177e4 | 1030 | = (unsigned char)priv->dp_out_buf_len; |
41ad427d AC |
1031 | port->write_urb->transfer_buffer_length = |
1032 | priv->dp_out_buf_len + 2; | |
41ad427d | 1033 | memcpy(port->write_urb->transfer_buffer + 2, priv->dp_out_buf, |
c6d61269 | 1034 | priv->dp_out_buf_len); |
41ad427d AC |
1035 | ret = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
1036 | if (ret == 0) { | |
1da177e4 LT |
1037 | priv->dp_write_urb_in_use = 1; |
1038 | priv->dp_out_buf_len = 0; | |
1039 | } | |
1da177e4 | 1040 | } |
1da177e4 | 1041 | /* wake up processes sleeping on writes immediately */ |
c6d61269 | 1042 | digi_wakeup_write(port); |
1da177e4 LT |
1043 | /* also queue up a wakeup at scheduler time, in case we */ |
1044 | /* lost the race in write_chan(). */ | |
1045 | schedule_work(&priv->dp_wakeup_work); | |
1046 | ||
c6d61269 | 1047 | spin_unlock(&priv->dp_port_lock); |
1f87158e | 1048 | if (ret && ret != -EPERM) |
22a416c4 | 1049 | dev_err_console(port, |
194343d9 | 1050 | "%s: usb_submit_urb failed, ret=%d, port=%d\n", |
441b62c1 | 1051 | __func__, ret, priv->dp_port_num); |
1da177e4 LT |
1052 | } |
1053 | ||
95da310e | 1054 | static int digi_write_room(struct tty_struct *tty) |
1da177e4 | 1055 | { |
95da310e | 1056 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 1057 | struct digi_port *priv = usb_get_serial_port_data(port); |
95da310e | 1058 | int room; |
1da177e4 LT |
1059 | unsigned long flags = 0; |
1060 | ||
c6d61269 | 1061 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 | 1062 | |
50de36f7 | 1063 | if (priv->dp_write_urb_in_use) |
1da177e4 LT |
1064 | room = 0; |
1065 | else | |
1066 | room = port->bulk_out_size - 2 - priv->dp_out_buf_len; | |
1067 | ||
c6d61269 AC |
1068 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
1069 | dbg("digi_write_room: port=%d, room=%d", priv->dp_port_num, room); | |
1070 | return room; | |
1da177e4 LT |
1071 | |
1072 | } | |
1073 | ||
95da310e | 1074 | static int digi_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 1075 | { |
95da310e | 1076 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
1077 | struct digi_port *priv = usb_get_serial_port_data(port); |
1078 | ||
50de36f7 | 1079 | if (priv->dp_write_urb_in_use) { |
c6d61269 AC |
1080 | dbg("digi_chars_in_buffer: port=%d, chars=%d", |
1081 | priv->dp_port_num, port->bulk_out_size - 2); | |
1082 | /* return(port->bulk_out_size - 2); */ | |
1083 | return 256; | |
1da177e4 | 1084 | } else { |
c6d61269 AC |
1085 | dbg("digi_chars_in_buffer: port=%d, chars=%d", |
1086 | priv->dp_port_num, priv->dp_out_buf_len); | |
1087 | return priv->dp_out_buf_len; | |
1da177e4 LT |
1088 | } |
1089 | ||
1090 | } | |
1091 | ||
335f8514 AC |
1092 | static void digi_dtr_rts(struct usb_serial_port *port, int on) |
1093 | { | |
1094 | /* Adjust DTR and RTS */ | |
1095 | digi_set_modem_signals(port, on * (TIOCM_DTR|TIOCM_RTS), 1); | |
1096 | } | |
1097 | ||
a509a7e4 | 1098 | static int digi_open(struct tty_struct *tty, struct usb_serial_port *port) |
1da177e4 | 1099 | { |
1da177e4 LT |
1100 | int ret; |
1101 | unsigned char buf[32]; | |
1102 | struct digi_port *priv = usb_get_serial_port_data(port); | |
606d099c | 1103 | struct ktermios not_termios; |
1da177e4 | 1104 | |
1da177e4 | 1105 | /* be sure the device is started up */ |
c6d61269 AC |
1106 | if (digi_startup_device(port->serial) != 0) |
1107 | return -ENXIO; | |
1da177e4 | 1108 | |
1da177e4 LT |
1109 | /* read modem signals automatically whenever they change */ |
1110 | buf[0] = DIGI_CMD_READ_INPUT_SIGNALS; | |
1111 | buf[1] = priv->dp_port_num; | |
1112 | buf[2] = DIGI_ENABLE; | |
1113 | buf[3] = 0; | |
1114 | ||
1115 | /* flush fifos */ | |
1116 | buf[4] = DIGI_CMD_IFLUSH_FIFO; | |
1117 | buf[5] = priv->dp_port_num; | |
1118 | buf[6] = DIGI_FLUSH_TX | DIGI_FLUSH_RX; | |
1119 | buf[7] = 0; | |
1120 | ||
41ad427d AC |
1121 | ret = digi_write_oob_command(port, buf, 8, 1); |
1122 | if (ret != 0) | |
c6d61269 | 1123 | dbg("digi_open: write oob failed, ret=%d", ret); |
1da177e4 LT |
1124 | |
1125 | /* set termios settings */ | |
95da310e AC |
1126 | if (tty) { |
1127 | not_termios.c_cflag = ~tty->termios->c_cflag; | |
1128 | not_termios.c_iflag = ~tty->termios->c_iflag; | |
1129 | digi_set_termios(tty, port, ¬_termios); | |
1130 | } | |
c6d61269 | 1131 | return 0; |
1da177e4 LT |
1132 | } |
1133 | ||
1134 | ||
335f8514 | 1135 | static void digi_close(struct usb_serial_port *port) |
1da177e4 LT |
1136 | { |
1137 | DEFINE_WAIT(wait); | |
1138 | int ret; | |
1139 | unsigned char buf[32]; | |
1da177e4 | 1140 | struct digi_port *priv = usb_get_serial_port_data(port); |
1da177e4 | 1141 | |
0915f490 | 1142 | mutex_lock(&port->serial->disc_mutex); |
1da177e4 | 1143 | /* if disconnected, just clear flags */ |
0915f490 | 1144 | if (port->serial->disconnected) |
1da177e4 LT |
1145 | goto exit; |
1146 | ||
1da177e4 | 1147 | if (port->serial->dev) { |
335f8514 AC |
1148 | /* FIXME: Transmit idle belongs in the wait_unti_sent path */ |
1149 | digi_transmit_idle(port, DIGI_CLOSE_TIMEOUT); | |
1da177e4 LT |
1150 | |
1151 | /* disable input flow control */ | |
1152 | buf[0] = DIGI_CMD_SET_INPUT_FLOW_CONTROL; | |
1153 | buf[1] = priv->dp_port_num; | |
1154 | buf[2] = DIGI_DISABLE; | |
1155 | buf[3] = 0; | |
1156 | ||
1157 | /* disable output flow control */ | |
1158 | buf[4] = DIGI_CMD_SET_OUTPUT_FLOW_CONTROL; | |
1159 | buf[5] = priv->dp_port_num; | |
1160 | buf[6] = DIGI_DISABLE; | |
1161 | buf[7] = 0; | |
1162 | ||
1163 | /* disable reading modem signals automatically */ | |
1164 | buf[8] = DIGI_CMD_READ_INPUT_SIGNALS; | |
1165 | buf[9] = priv->dp_port_num; | |
1166 | buf[10] = DIGI_DISABLE; | |
1167 | buf[11] = 0; | |
1168 | ||
1169 | /* disable receive */ | |
1170 | buf[12] = DIGI_CMD_RECEIVE_ENABLE; | |
1171 | buf[13] = priv->dp_port_num; | |
1172 | buf[14] = DIGI_DISABLE; | |
1173 | buf[15] = 0; | |
1174 | ||
1175 | /* flush fifos */ | |
1176 | buf[16] = DIGI_CMD_IFLUSH_FIFO; | |
1177 | buf[17] = priv->dp_port_num; | |
1178 | buf[18] = DIGI_FLUSH_TX | DIGI_FLUSH_RX; | |
1179 | buf[19] = 0; | |
1180 | ||
41ad427d AC |
1181 | ret = digi_write_oob_command(port, buf, 20, 0); |
1182 | if (ret != 0) | |
c6d61269 | 1183 | dbg("digi_close: write oob failed, ret=%d", ret); |
1da177e4 LT |
1184 | |
1185 | /* wait for final commands on oob port to complete */ | |
41ad427d AC |
1186 | prepare_to_wait(&priv->dp_flush_wait, &wait, |
1187 | TASK_INTERRUPTIBLE); | |
1da177e4 LT |
1188 | schedule_timeout(DIGI_CLOSE_TIMEOUT); |
1189 | finish_wait(&priv->dp_flush_wait, &wait); | |
1190 | ||
1191 | /* shutdown any outstanding bulk writes */ | |
1192 | usb_kill_urb(port->write_urb); | |
1193 | } | |
1da177e4 | 1194 | exit: |
0915f490 | 1195 | spin_lock_irq(&priv->dp_port_lock); |
1da177e4 | 1196 | priv->dp_write_urb_in_use = 0; |
c6d61269 | 1197 | wake_up_interruptible(&priv->dp_close_wait); |
0915f490 ON |
1198 | spin_unlock_irq(&priv->dp_port_lock); |
1199 | mutex_unlock(&port->serial->disc_mutex); | |
1da177e4 LT |
1200 | } |
1201 | ||
1202 | ||
1203 | /* | |
41ad427d AC |
1204 | * Digi Startup Device |
1205 | * | |
1206 | * Starts reads on all ports. Must be called AFTER startup, with | |
1207 | * urbs initialized. Returns 0 if successful, non-zero error otherwise. | |
1208 | */ | |
1da177e4 | 1209 | |
c6d61269 | 1210 | static int digi_startup_device(struct usb_serial *serial) |
1da177e4 | 1211 | { |
41ad427d | 1212 | int i, ret = 0; |
1da177e4 LT |
1213 | struct digi_serial *serial_priv = usb_get_serial_data(serial); |
1214 | struct usb_serial_port *port; | |
1215 | ||
1da177e4 | 1216 | /* be sure this happens exactly once */ |
c6d61269 AC |
1217 | spin_lock(&serial_priv->ds_serial_lock); |
1218 | if (serial_priv->ds_device_started) { | |
1219 | spin_unlock(&serial_priv->ds_serial_lock); | |
1220 | return 0; | |
1da177e4 LT |
1221 | } |
1222 | serial_priv->ds_device_started = 1; | |
c6d61269 | 1223 | spin_unlock(&serial_priv->ds_serial_lock); |
1da177e4 LT |
1224 | |
1225 | /* start reading from each bulk in endpoint for the device */ | |
1226 | /* set USB_DISABLE_SPD flag for write bulk urbs */ | |
c6d61269 | 1227 | for (i = 0; i < serial->type->num_ports + 1; i++) { |
1da177e4 | 1228 | port = serial->port[i]; |
41ad427d AC |
1229 | ret = usb_submit_urb(port->read_urb, GFP_KERNEL); |
1230 | if (ret != 0) { | |
194343d9 GKH |
1231 | dev_err(&port->dev, |
1232 | "%s: usb_submit_urb failed, ret=%d, port=%d\n", | |
1233 | __func__, ret, i); | |
1da177e4 LT |
1234 | break; |
1235 | } | |
1da177e4 | 1236 | } |
c6d61269 | 1237 | return ret; |
1da177e4 LT |
1238 | } |
1239 | ||
1240 | ||
c6d61269 | 1241 | static int digi_startup(struct usb_serial *serial) |
1da177e4 LT |
1242 | { |
1243 | ||
1244 | int i; | |
1245 | struct digi_port *priv; | |
1246 | struct digi_serial *serial_priv; | |
1247 | ||
1da177e4 LT |
1248 | /* allocate the private data structures for all ports */ |
1249 | /* number of regular ports + 1 for the out-of-band port */ | |
41ad427d | 1250 | for (i = 0; i < serial->type->num_ports + 1; i++) { |
1da177e4 | 1251 | /* allocate port private structure */ |
c6d61269 AC |
1252 | priv = kmalloc(sizeof(struct digi_port), GFP_KERNEL); |
1253 | if (priv == NULL) { | |
1254 | while (--i >= 0) | |
1255 | kfree(usb_get_serial_port_data(serial->port[i])); | |
1256 | return 1; /* error */ | |
1da177e4 LT |
1257 | } |
1258 | ||
1259 | /* initialize port private structure */ | |
c6d61269 | 1260 | spin_lock_init(&priv->dp_port_lock); |
1da177e4 LT |
1261 | priv->dp_port_num = i; |
1262 | priv->dp_out_buf_len = 0; | |
1da177e4 LT |
1263 | priv->dp_write_urb_in_use = 0; |
1264 | priv->dp_modem_signals = 0; | |
c6d61269 | 1265 | init_waitqueue_head(&priv->dp_modem_change_wait); |
1da177e4 | 1266 | priv->dp_transmit_idle = 0; |
c6d61269 | 1267 | init_waitqueue_head(&priv->dp_transmit_idle_wait); |
1da177e4 LT |
1268 | priv->dp_throttled = 0; |
1269 | priv->dp_throttle_restart = 0; | |
c6d61269 | 1270 | init_waitqueue_head(&priv->dp_flush_wait); |
c6d61269 | 1271 | init_waitqueue_head(&priv->dp_close_wait); |
c4028958 DH |
1272 | INIT_WORK(&priv->dp_wakeup_work, digi_wakeup_write_lock); |
1273 | priv->dp_port = serial->port[i]; | |
1da177e4 | 1274 | /* initialize write wait queue for this port */ |
c6d61269 | 1275 | init_waitqueue_head(&serial->port[i]->write_wait); |
1da177e4 LT |
1276 | |
1277 | usb_set_serial_port_data(serial->port[i], priv); | |
1278 | } | |
1279 | ||
1280 | /* allocate serial private structure */ | |
c6d61269 AC |
1281 | serial_priv = kmalloc(sizeof(struct digi_serial), GFP_KERNEL); |
1282 | if (serial_priv == NULL) { | |
1283 | for (i = 0; i < serial->type->num_ports + 1; i++) | |
1284 | kfree(usb_get_serial_port_data(serial->port[i])); | |
1285 | return 1; /* error */ | |
1da177e4 LT |
1286 | } |
1287 | ||
1288 | /* initialize serial private structure */ | |
c6d61269 | 1289 | spin_lock_init(&serial_priv->ds_serial_lock); |
1da177e4 LT |
1290 | serial_priv->ds_oob_port_num = serial->type->num_ports; |
1291 | serial_priv->ds_oob_port = serial->port[serial_priv->ds_oob_port_num]; | |
1292 | serial_priv->ds_device_started = 0; | |
1293 | usb_set_serial_data(serial, serial_priv); | |
1294 | ||
c6d61269 | 1295 | return 0; |
1da177e4 LT |
1296 | } |
1297 | ||
1298 | ||
f9c99bb8 | 1299 | static void digi_disconnect(struct usb_serial *serial) |
1da177e4 | 1300 | { |
1da177e4 | 1301 | int i; |
1da177e4 LT |
1302 | |
1303 | /* stop reads and writes on all ports */ | |
c6d61269 | 1304 | for (i = 0; i < serial->type->num_ports + 1; i++) { |
1da177e4 LT |
1305 | usb_kill_urb(serial->port[i]->read_urb); |
1306 | usb_kill_urb(serial->port[i]->write_urb); | |
1307 | } | |
f9c99bb8 AS |
1308 | } |
1309 | ||
1310 | ||
1311 | static void digi_release(struct usb_serial *serial) | |
1312 | { | |
1313 | int i; | |
1da177e4 LT |
1314 | |
1315 | /* free the private data structures for all ports */ | |
1316 | /* number of regular ports + 1 for the out-of-band port */ | |
41ad427d | 1317 | for (i = 0; i < serial->type->num_ports + 1; i++) |
c6d61269 AC |
1318 | kfree(usb_get_serial_port_data(serial->port[i])); |
1319 | kfree(usb_get_serial_data(serial)); | |
1da177e4 LT |
1320 | } |
1321 | ||
1322 | ||
c6d61269 | 1323 | static void digi_read_bulk_callback(struct urb *urb) |
1da177e4 | 1324 | { |
cdc97792 | 1325 | struct usb_serial_port *port = urb->context; |
1da177e4 LT |
1326 | struct digi_port *priv; |
1327 | struct digi_serial *serial_priv; | |
1328 | int ret; | |
85d75107 | 1329 | int status = urb->status; |
1da177e4 | 1330 | |
1da177e4 | 1331 | /* port sanity check, do not resubmit if port is not valid */ |
194343d9 GKH |
1332 | if (port == NULL) |
1333 | return; | |
1334 | priv = usb_get_serial_port_data(port); | |
1335 | if (priv == NULL) { | |
1336 | dev_err(&port->dev, "%s: port->private is NULL, status=%d\n", | |
1337 | __func__, status); | |
1da177e4 LT |
1338 | return; |
1339 | } | |
c6d61269 | 1340 | if (port->serial == NULL || |
41ad427d | 1341 | (serial_priv = usb_get_serial_data(port->serial)) == NULL) { |
194343d9 GKH |
1342 | dev_err(&port->dev, "%s: serial is bad or serial->private " |
1343 | "is NULL, status=%d\n", __func__, status); | |
1da177e4 LT |
1344 | return; |
1345 | } | |
1346 | ||
1347 | /* do not resubmit urb if it has any status error */ | |
85d75107 | 1348 | if (status) { |
194343d9 GKH |
1349 | dev_err(&port->dev, |
1350 | "%s: nonzero read bulk status: status=%d, port=%d\n", | |
1351 | __func__, status, priv->dp_port_num); | |
1da177e4 LT |
1352 | return; |
1353 | } | |
1354 | ||
1355 | /* handle oob or inb callback, do not resubmit if error */ | |
c6d61269 AC |
1356 | if (priv->dp_port_num == serial_priv->ds_oob_port_num) { |
1357 | if (digi_read_oob_callback(urb) != 0) | |
1da177e4 LT |
1358 | return; |
1359 | } else { | |
c6d61269 | 1360 | if (digi_read_inb_callback(urb) != 0) |
1da177e4 LT |
1361 | return; |
1362 | } | |
1363 | ||
1364 | /* continue read */ | |
41ad427d | 1365 | ret = usb_submit_urb(urb, GFP_ATOMIC); |
1f87158e | 1366 | if (ret != 0 && ret != -EPERM) { |
194343d9 GKH |
1367 | dev_err(&port->dev, |
1368 | "%s: failed resubmitting urb, ret=%d, port=%d\n", | |
1369 | __func__, ret, priv->dp_port_num); | |
1da177e4 LT |
1370 | } |
1371 | ||
1372 | } | |
1373 | ||
41ad427d AC |
1374 | /* |
1375 | * Digi Read INB Callback | |
1376 | * | |
1377 | * Digi Read INB Callback handles reads on the in band ports, sending | |
1378 | * the data on to the tty subsystem. When called we know port and | |
1379 | * port->private are not NULL and port->serial has been validated. | |
1380 | * It returns 0 if successful, 1 if successful but the port is | |
1381 | * throttled, and -1 if the sanity checks failed. | |
1382 | */ | |
1da177e4 | 1383 | |
c6d61269 | 1384 | static int digi_read_inb_callback(struct urb *urb) |
1da177e4 LT |
1385 | { |
1386 | ||
cdc97792 | 1387 | struct usb_serial_port *port = urb->context; |
4a90f09b | 1388 | struct tty_struct *tty; |
1da177e4 LT |
1389 | struct digi_port *priv = usb_get_serial_port_data(port); |
1390 | int opcode = ((unsigned char *)urb->transfer_buffer)[0]; | |
1391 | int len = ((unsigned char *)urb->transfer_buffer)[1]; | |
85d75107 | 1392 | int port_status = ((unsigned char *)urb->transfer_buffer)[2]; |
41ad427d AC |
1393 | unsigned char *data = ((unsigned char *)urb->transfer_buffer) + 3; |
1394 | int flag, throttled; | |
85d75107 | 1395 | int status = urb->status; |
1da177e4 LT |
1396 | |
1397 | /* do not process callbacks on closed ports */ | |
1398 | /* but do continue the read chain */ | |
1f87158e | 1399 | if (urb->status == -ENOENT) |
c6d61269 | 1400 | return 0; |
1da177e4 LT |
1401 | |
1402 | /* short/multiple packet check */ | |
c6d61269 | 1403 | if (urb->actual_length != len + 2) { |
194343d9 | 1404 | dev_err(&port->dev, "%s: INCOMPLETE OR MULTIPLE PACKET, " |
50de36f7 | 1405 | "status=%d, port=%d, opcode=%d, len=%d, " |
194343d9 GKH |
1406 | "actual_length=%d, status=%d\n", __func__, status, |
1407 | priv->dp_port_num, opcode, len, urb->actual_length, | |
1408 | port_status); | |
c6d61269 | 1409 | return -1; |
1da177e4 LT |
1410 | } |
1411 | ||
4a90f09b | 1412 | tty = tty_port_tty_get(&port->port); |
c6d61269 | 1413 | spin_lock(&priv->dp_port_lock); |
1da177e4 LT |
1414 | |
1415 | /* check for throttle; if set, do not resubmit read urb */ | |
1416 | /* indicate the read chain needs to be restarted on unthrottle */ | |
1417 | throttled = priv->dp_throttled; | |
c6d61269 | 1418 | if (throttled) |
1da177e4 LT |
1419 | priv->dp_throttle_restart = 1; |
1420 | ||
1421 | /* receive data */ | |
4287341d | 1422 | if (tty && opcode == DIGI_CMD_RECEIVE_DATA) { |
85d75107 | 1423 | /* get flag from port_status */ |
1da177e4 LT |
1424 | flag = 0; |
1425 | ||
1426 | /* overrun is special, not associated with a char */ | |
c6d61269 AC |
1427 | if (port_status & DIGI_OVERRUN_ERROR) |
1428 | tty_insert_flip_char(tty, 0, TTY_OVERRUN); | |
1da177e4 LT |
1429 | |
1430 | /* break takes precedence over parity, */ | |
1431 | /* which takes precedence over framing errors */ | |
c6d61269 | 1432 | if (port_status & DIGI_BREAK_ERROR) |
1da177e4 | 1433 | flag = TTY_BREAK; |
c6d61269 | 1434 | else if (port_status & DIGI_PARITY_ERROR) |
1da177e4 | 1435 | flag = TTY_PARITY; |
c6d61269 | 1436 | else if (port_status & DIGI_FRAMING_ERROR) |
1da177e4 | 1437 | flag = TTY_FRAME; |
1da177e4 | 1438 | |
85d75107 | 1439 | /* data length is len-1 (one byte of len is port_status) */ |
1da177e4 | 1440 | --len; |
c6d61269 | 1441 | if (len > 0) { |
70ced221 JH |
1442 | tty_insert_flip_string_fixed_flag(tty, data, flag, |
1443 | len); | |
c6d61269 | 1444 | tty_flip_buffer_push(tty); |
1da177e4 | 1445 | } |
1da177e4 | 1446 | } |
c6d61269 | 1447 | spin_unlock(&priv->dp_port_lock); |
4a90f09b | 1448 | tty_kref_put(tty); |
1da177e4 | 1449 | |
c6d61269 | 1450 | if (opcode == DIGI_CMD_RECEIVE_DISABLE) |
441b62c1 | 1451 | dbg("%s: got RECEIVE_DISABLE", __func__); |
c6d61269 | 1452 | else if (opcode != DIGI_CMD_RECEIVE_DATA) |
441b62c1 | 1453 | dbg("%s: unknown opcode: %d", __func__, opcode); |
1da177e4 | 1454 | |
41ad427d | 1455 | return throttled ? 1 : 0; |
1da177e4 LT |
1456 | |
1457 | } | |
1458 | ||
1459 | ||
41ad427d AC |
1460 | /* |
1461 | * Digi Read OOB Callback | |
1462 | * | |
1463 | * Digi Read OOB Callback handles reads on the out of band port. | |
1464 | * When called we know port and port->private are not NULL and | |
1465 | * the port->serial is valid. It returns 0 if successful, and | |
1466 | * -1 if the sanity checks failed. | |
1467 | */ | |
1da177e4 | 1468 | |
c6d61269 | 1469 | static int digi_read_oob_callback(struct urb *urb) |
1da177e4 LT |
1470 | { |
1471 | ||
cdc97792 | 1472 | struct usb_serial_port *port = urb->context; |
1da177e4 | 1473 | struct usb_serial *serial = port->serial; |
4a90f09b | 1474 | struct tty_struct *tty; |
1da177e4 LT |
1475 | struct digi_port *priv = usb_get_serial_port_data(port); |
1476 | int opcode, line, status, val; | |
1477 | int i; | |
41ad427d | 1478 | unsigned int rts; |
1da177e4 | 1479 | |
1da177e4 | 1480 | /* handle each oob command */ |
41ad427d | 1481 | for (i = 0; i < urb->actual_length - 3;) { |
1da177e4 LT |
1482 | opcode = ((unsigned char *)urb->transfer_buffer)[i++]; |
1483 | line = ((unsigned char *)urb->transfer_buffer)[i++]; | |
1484 | status = ((unsigned char *)urb->transfer_buffer)[i++]; | |
1485 | val = ((unsigned char *)urb->transfer_buffer)[i++]; | |
1486 | ||
c6d61269 AC |
1487 | dbg("digi_read_oob_callback: opcode=%d, line=%d, status=%d, val=%d", |
1488 | opcode, line, status, val); | |
1da177e4 | 1489 | |
c6d61269 | 1490 | if (status != 0 || line >= serial->type->num_ports) |
1da177e4 LT |
1491 | continue; |
1492 | ||
1493 | port = serial->port[line]; | |
1494 | ||
41ad427d AC |
1495 | priv = usb_get_serial_port_data(port); |
1496 | if (priv == NULL) | |
1da177e4 LT |
1497 | return -1; |
1498 | ||
4a90f09b | 1499 | tty = tty_port_tty_get(&port->port); |
4287341d | 1500 | |
41ad427d | 1501 | rts = 0; |
4287341d AC |
1502 | if (tty) |
1503 | rts = tty->termios->c_cflag & CRTSCTS; | |
4a90f09b | 1504 | |
4287341d | 1505 | if (tty && opcode == DIGI_CMD_READ_INPUT_SIGNALS) { |
c6d61269 | 1506 | spin_lock(&priv->dp_port_lock); |
1da177e4 | 1507 | /* convert from digi flags to termiox flags */ |
c6d61269 | 1508 | if (val & DIGI_READ_INPUT_SIGNALS_CTS) { |
1da177e4 LT |
1509 | priv->dp_modem_signals |= TIOCM_CTS; |
1510 | /* port must be open to use tty struct */ | |
41ad427d | 1511 | if (rts) { |
4a90f09b | 1512 | tty->hw_stopped = 0; |
c6d61269 | 1513 | digi_wakeup_write(port); |
1da177e4 LT |
1514 | } |
1515 | } else { | |
1516 | priv->dp_modem_signals &= ~TIOCM_CTS; | |
1517 | /* port must be open to use tty struct */ | |
41ad427d | 1518 | if (rts) |
4a90f09b | 1519 | tty->hw_stopped = 1; |
1da177e4 | 1520 | } |
c6d61269 | 1521 | if (val & DIGI_READ_INPUT_SIGNALS_DSR) |
1da177e4 LT |
1522 | priv->dp_modem_signals |= TIOCM_DSR; |
1523 | else | |
1524 | priv->dp_modem_signals &= ~TIOCM_DSR; | |
c6d61269 | 1525 | if (val & DIGI_READ_INPUT_SIGNALS_RI) |
1da177e4 LT |
1526 | priv->dp_modem_signals |= TIOCM_RI; |
1527 | else | |
1528 | priv->dp_modem_signals &= ~TIOCM_RI; | |
c6d61269 | 1529 | if (val & DIGI_READ_INPUT_SIGNALS_DCD) |
1da177e4 LT |
1530 | priv->dp_modem_signals |= TIOCM_CD; |
1531 | else | |
1532 | priv->dp_modem_signals &= ~TIOCM_CD; | |
1533 | ||
c6d61269 AC |
1534 | wake_up_interruptible(&priv->dp_modem_change_wait); |
1535 | spin_unlock(&priv->dp_port_lock); | |
1536 | } else if (opcode == DIGI_CMD_TRANSMIT_IDLE) { | |
1537 | spin_lock(&priv->dp_port_lock); | |
1da177e4 | 1538 | priv->dp_transmit_idle = 1; |
c6d61269 AC |
1539 | wake_up_interruptible(&priv->dp_transmit_idle_wait); |
1540 | spin_unlock(&priv->dp_port_lock); | |
1541 | } else if (opcode == DIGI_CMD_IFLUSH_FIFO) { | |
1542 | wake_up_interruptible(&priv->dp_flush_wait); | |
1da177e4 | 1543 | } |
4a90f09b | 1544 | tty_kref_put(tty); |
1da177e4 | 1545 | } |
c6d61269 | 1546 | return 0; |
1da177e4 LT |
1547 | |
1548 | } | |
1549 | ||
68e24113 | 1550 | module_usb_serial_driver(serial_drivers, id_table_combined); |
1da177e4 | 1551 | |
c6d61269 AC |
1552 | MODULE_AUTHOR(DRIVER_AUTHOR); |
1553 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 LT |
1554 | MODULE_LICENSE("GPL"); |
1555 | ||
1556 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
1557 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |