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 | ||
1da177e4 LT |
35 | #define DRIVER_AUTHOR "Peter Berger <pberger@brimson.com>, Al Borchers <borchers@steinerpoint.com>" |
36 | #define DRIVER_DESC "Digi AccelePort USB-2/USB-4 Serial Converter driver" | |
37 | ||
38 | /* port output buffer length -- must be <= transfer buffer length - 2 */ | |
39 | /* so we can be sure to send the full buffer in one urb */ | |
40 | #define DIGI_OUT_BUF_SIZE 8 | |
41 | ||
42 | /* port input buffer length -- must be >= transfer buffer length - 3 */ | |
43 | /* so we can be sure to hold at least one full buffer from one urb */ | |
44 | #define DIGI_IN_BUF_SIZE 64 | |
45 | ||
46 | /* retry timeout while sleeping */ | |
47 | #define DIGI_RETRY_TIMEOUT (HZ/10) | |
48 | ||
49 | /* timeout while waiting for tty output to drain in close */ | |
50 | /* this delay is used twice in close, so the total delay could */ | |
51 | /* be twice this value */ | |
52 | #define DIGI_CLOSE_TIMEOUT (5*HZ) | |
53 | ||
54 | ||
55 | /* AccelePort USB Defines */ | |
56 | ||
57 | /* ids */ | |
58 | #define DIGI_VENDOR_ID 0x05c5 | |
59 | #define DIGI_2_ID 0x0002 /* USB-2 */ | |
60 | #define DIGI_4_ID 0x0004 /* USB-4 */ | |
61 | ||
62 | /* commands | |
63 | * "INB": can be used on the in-band endpoint | |
64 | * "OOB": can be used on the out-of-band endpoint | |
65 | */ | |
66 | #define DIGI_CMD_SET_BAUD_RATE 0 /* INB, OOB */ | |
67 | #define DIGI_CMD_SET_WORD_SIZE 1 /* INB, OOB */ | |
68 | #define DIGI_CMD_SET_PARITY 2 /* INB, OOB */ | |
69 | #define DIGI_CMD_SET_STOP_BITS 3 /* INB, OOB */ | |
70 | #define DIGI_CMD_SET_INPUT_FLOW_CONTROL 4 /* INB, OOB */ | |
71 | #define DIGI_CMD_SET_OUTPUT_FLOW_CONTROL 5 /* INB, OOB */ | |
72 | #define DIGI_CMD_SET_DTR_SIGNAL 6 /* INB, OOB */ | |
73 | #define DIGI_CMD_SET_RTS_SIGNAL 7 /* INB, OOB */ | |
74 | #define DIGI_CMD_READ_INPUT_SIGNALS 8 /* OOB */ | |
75 | #define DIGI_CMD_IFLUSH_FIFO 9 /* OOB */ | |
76 | #define DIGI_CMD_RECEIVE_ENABLE 10 /* INB, OOB */ | |
77 | #define DIGI_CMD_BREAK_CONTROL 11 /* INB, OOB */ | |
78 | #define DIGI_CMD_LOCAL_LOOPBACK 12 /* INB, OOB */ | |
79 | #define DIGI_CMD_TRANSMIT_IDLE 13 /* INB, OOB */ | |
80 | #define DIGI_CMD_READ_UART_REGISTER 14 /* OOB */ | |
81 | #define DIGI_CMD_WRITE_UART_REGISTER 15 /* INB, OOB */ | |
82 | #define DIGI_CMD_AND_UART_REGISTER 16 /* INB, OOB */ | |
83 | #define DIGI_CMD_OR_UART_REGISTER 17 /* INB, OOB */ | |
84 | #define DIGI_CMD_SEND_DATA 18 /* INB */ | |
85 | #define DIGI_CMD_RECEIVE_DATA 19 /* INB */ | |
86 | #define DIGI_CMD_RECEIVE_DISABLE 20 /* INB */ | |
87 | #define DIGI_CMD_GET_PORT_TYPE 21 /* OOB */ | |
88 | ||
89 | /* baud rates */ | |
90 | #define DIGI_BAUD_50 0 | |
91 | #define DIGI_BAUD_75 1 | |
92 | #define DIGI_BAUD_110 2 | |
93 | #define DIGI_BAUD_150 3 | |
94 | #define DIGI_BAUD_200 4 | |
95 | #define DIGI_BAUD_300 5 | |
96 | #define DIGI_BAUD_600 6 | |
97 | #define DIGI_BAUD_1200 7 | |
98 | #define DIGI_BAUD_1800 8 | |
99 | #define DIGI_BAUD_2400 9 | |
100 | #define DIGI_BAUD_4800 10 | |
101 | #define DIGI_BAUD_7200 11 | |
102 | #define DIGI_BAUD_9600 12 | |
103 | #define DIGI_BAUD_14400 13 | |
104 | #define DIGI_BAUD_19200 14 | |
105 | #define DIGI_BAUD_28800 15 | |
106 | #define DIGI_BAUD_38400 16 | |
107 | #define DIGI_BAUD_57600 17 | |
108 | #define DIGI_BAUD_76800 18 | |
109 | #define DIGI_BAUD_115200 19 | |
110 | #define DIGI_BAUD_153600 20 | |
111 | #define DIGI_BAUD_230400 21 | |
112 | #define DIGI_BAUD_460800 22 | |
113 | ||
114 | /* arguments */ | |
115 | #define DIGI_WORD_SIZE_5 0 | |
116 | #define DIGI_WORD_SIZE_6 1 | |
117 | #define DIGI_WORD_SIZE_7 2 | |
118 | #define DIGI_WORD_SIZE_8 3 | |
119 | ||
120 | #define DIGI_PARITY_NONE 0 | |
121 | #define DIGI_PARITY_ODD 1 | |
122 | #define DIGI_PARITY_EVEN 2 | |
123 | #define DIGI_PARITY_MARK 3 | |
124 | #define DIGI_PARITY_SPACE 4 | |
125 | ||
126 | #define DIGI_STOP_BITS_1 0 | |
127 | #define DIGI_STOP_BITS_2 1 | |
128 | ||
129 | #define DIGI_INPUT_FLOW_CONTROL_XON_XOFF 1 | |
130 | #define DIGI_INPUT_FLOW_CONTROL_RTS 2 | |
131 | #define DIGI_INPUT_FLOW_CONTROL_DTR 4 | |
132 | ||
133 | #define DIGI_OUTPUT_FLOW_CONTROL_XON_XOFF 1 | |
134 | #define DIGI_OUTPUT_FLOW_CONTROL_CTS 2 | |
135 | #define DIGI_OUTPUT_FLOW_CONTROL_DSR 4 | |
136 | ||
137 | #define DIGI_DTR_INACTIVE 0 | |
138 | #define DIGI_DTR_ACTIVE 1 | |
139 | #define DIGI_DTR_INPUT_FLOW_CONTROL 2 | |
140 | ||
141 | #define DIGI_RTS_INACTIVE 0 | |
142 | #define DIGI_RTS_ACTIVE 1 | |
143 | #define DIGI_RTS_INPUT_FLOW_CONTROL 2 | |
144 | #define DIGI_RTS_TOGGLE 3 | |
145 | ||
146 | #define DIGI_FLUSH_TX 1 | |
147 | #define DIGI_FLUSH_RX 2 | |
148 | #define DIGI_RESUME_TX 4 /* clears xoff condition */ | |
149 | ||
150 | #define DIGI_TRANSMIT_NOT_IDLE 0 | |
151 | #define DIGI_TRANSMIT_IDLE 1 | |
152 | ||
153 | #define DIGI_DISABLE 0 | |
154 | #define DIGI_ENABLE 1 | |
155 | ||
156 | #define DIGI_DEASSERT 0 | |
157 | #define DIGI_ASSERT 1 | |
158 | ||
159 | /* in band status codes */ | |
160 | #define DIGI_OVERRUN_ERROR 4 | |
161 | #define DIGI_PARITY_ERROR 8 | |
162 | #define DIGI_FRAMING_ERROR 16 | |
163 | #define DIGI_BREAK_ERROR 32 | |
164 | ||
165 | /* out of band status */ | |
166 | #define DIGI_NO_ERROR 0 | |
167 | #define DIGI_BAD_FIRST_PARAMETER 1 | |
168 | #define DIGI_BAD_SECOND_PARAMETER 2 | |
169 | #define DIGI_INVALID_LINE 3 | |
170 | #define DIGI_INVALID_OPCODE 4 | |
171 | ||
172 | /* input signals */ | |
173 | #define DIGI_READ_INPUT_SIGNALS_SLOT 1 | |
174 | #define DIGI_READ_INPUT_SIGNALS_ERR 2 | |
175 | #define DIGI_READ_INPUT_SIGNALS_BUSY 4 | |
176 | #define DIGI_READ_INPUT_SIGNALS_PE 8 | |
177 | #define DIGI_READ_INPUT_SIGNALS_CTS 16 | |
178 | #define DIGI_READ_INPUT_SIGNALS_DSR 32 | |
179 | #define DIGI_READ_INPUT_SIGNALS_RI 64 | |
180 | #define DIGI_READ_INPUT_SIGNALS_DCD 128 | |
181 | ||
182 | ||
183 | /* Structures */ | |
184 | ||
185 | struct digi_serial { | |
186 | spinlock_t ds_serial_lock; | |
187 | struct usb_serial_port *ds_oob_port; /* out-of-band port */ | |
188 | int ds_oob_port_num; /* index of out-of-band port */ | |
189 | int ds_device_started; | |
190 | }; | |
191 | ||
192 | struct digi_port { | |
193 | spinlock_t dp_port_lock; | |
194 | int dp_port_num; | |
195 | int dp_out_buf_len; | |
196 | unsigned char dp_out_buf[DIGI_OUT_BUF_SIZE]; | |
1da177e4 LT |
197 | int dp_write_urb_in_use; |
198 | unsigned int dp_modem_signals; | |
199 | wait_queue_head_t dp_modem_change_wait; | |
200 | int dp_transmit_idle; | |
201 | wait_queue_head_t dp_transmit_idle_wait; | |
202 | int dp_throttled; | |
203 | int dp_throttle_restart; | |
204 | wait_queue_head_t dp_flush_wait; | |
1da177e4 LT |
205 | wait_queue_head_t dp_close_wait; /* wait queue for close */ |
206 | struct work_struct dp_wakeup_work; | |
c4028958 | 207 | struct usb_serial_port *dp_port; |
1da177e4 LT |
208 | }; |
209 | ||
210 | ||
211 | /* Local Function Declarations */ | |
212 | ||
c6d61269 | 213 | static void digi_wakeup_write(struct usb_serial_port *port); |
c4028958 | 214 | static void digi_wakeup_write_lock(struct work_struct *work); |
c6d61269 AC |
215 | static int digi_write_oob_command(struct usb_serial_port *port, |
216 | unsigned char *buf, int count, int interruptible); | |
217 | static int digi_write_inb_command(struct usb_serial_port *port, | |
218 | unsigned char *buf, int count, unsigned long timeout); | |
219 | static int digi_set_modem_signals(struct usb_serial_port *port, | |
220 | unsigned int modem_signals, int interruptible); | |
221 | static int digi_transmit_idle(struct usb_serial_port *port, | |
222 | unsigned long timeout); | |
41ad427d AC |
223 | static void digi_rx_throttle(struct tty_struct *tty); |
224 | static void digi_rx_unthrottle(struct tty_struct *tty); | |
95da310e AC |
225 | static void digi_set_termios(struct tty_struct *tty, |
226 | struct usb_serial_port *port, struct ktermios *old_termios); | |
227 | static void digi_break_ctl(struct tty_struct *tty, int break_state); | |
60b33c13 | 228 | static int digi_tiocmget(struct tty_struct *tty); |
20b9d177 AC |
229 | static int digi_tiocmset(struct tty_struct *tty, unsigned int set, |
230 | unsigned int clear); | |
95da310e | 231 | static int digi_write(struct tty_struct *tty, struct usb_serial_port *port, |
20b9d177 | 232 | const unsigned char *buf, int count); |
c6d61269 | 233 | static void digi_write_bulk_callback(struct urb *urb); |
95da310e AC |
234 | static int digi_write_room(struct tty_struct *tty); |
235 | static int digi_chars_in_buffer(struct tty_struct *tty); | |
a509a7e4 | 236 | static int digi_open(struct tty_struct *tty, struct usb_serial_port *port); |
335f8514 | 237 | static void digi_close(struct usb_serial_port *port); |
335f8514 | 238 | static void digi_dtr_rts(struct usb_serial_port *port, int on); |
c6d61269 AC |
239 | static int digi_startup_device(struct usb_serial *serial); |
240 | static int digi_startup(struct usb_serial *serial); | |
f9c99bb8 AS |
241 | static void digi_disconnect(struct usb_serial *serial); |
242 | static void digi_release(struct usb_serial *serial); | |
fb44ff85 JH |
243 | static int digi_port_probe(struct usb_serial_port *port); |
244 | static int digi_port_remove(struct usb_serial_port *port); | |
c6d61269 AC |
245 | static void digi_read_bulk_callback(struct urb *urb); |
246 | static int digi_read_inb_callback(struct urb *urb); | |
247 | static int digi_read_oob_callback(struct urb *urb); | |
1da177e4 LT |
248 | |
249 | ||
7d40d7e8 | 250 | static const struct usb_device_id id_table_combined[] = { |
1da177e4 LT |
251 | { USB_DEVICE(DIGI_VENDOR_ID, DIGI_2_ID) }, |
252 | { USB_DEVICE(DIGI_VENDOR_ID, DIGI_4_ID) }, | |
253 | { } /* Terminating entry */ | |
254 | }; | |
255 | ||
7d40d7e8 | 256 | static const struct usb_device_id id_table_2[] = { |
1da177e4 LT |
257 | { USB_DEVICE(DIGI_VENDOR_ID, DIGI_2_ID) }, |
258 | { } /* Terminating entry */ | |
259 | }; | |
260 | ||
7d40d7e8 | 261 | static const struct usb_device_id id_table_4[] = { |
1da177e4 LT |
262 | { USB_DEVICE(DIGI_VENDOR_ID, DIGI_4_ID) }, |
263 | { } /* Terminating entry */ | |
264 | }; | |
265 | ||
41ad427d | 266 | MODULE_DEVICE_TABLE(usb, id_table_combined); |
1da177e4 | 267 | |
1da177e4 LT |
268 | /* device info needed for the Digi serial converter */ |
269 | ||
ea65370d | 270 | static struct usb_serial_driver digi_acceleport_2_device = { |
18fcac35 | 271 | .driver = { |
269bda1c GKH |
272 | .owner = THIS_MODULE, |
273 | .name = "digi_2", | |
18fcac35 | 274 | }, |
269bda1c | 275 | .description = "Digi 2 port USB adapter", |
1da177e4 | 276 | .id_table = id_table_2, |
1da177e4 LT |
277 | .num_ports = 3, |
278 | .open = digi_open, | |
279 | .close = digi_close, | |
335f8514 | 280 | .dtr_rts = digi_dtr_rts, |
1da177e4 LT |
281 | .write = digi_write, |
282 | .write_room = digi_write_room, | |
283 | .write_bulk_callback = digi_write_bulk_callback, | |
284 | .read_bulk_callback = digi_read_bulk_callback, | |
285 | .chars_in_buffer = digi_chars_in_buffer, | |
286 | .throttle = digi_rx_throttle, | |
287 | .unthrottle = digi_rx_unthrottle, | |
1da177e4 LT |
288 | .set_termios = digi_set_termios, |
289 | .break_ctl = digi_break_ctl, | |
290 | .tiocmget = digi_tiocmget, | |
291 | .tiocmset = digi_tiocmset, | |
292 | .attach = digi_startup, | |
f9c99bb8 AS |
293 | .disconnect = digi_disconnect, |
294 | .release = digi_release, | |
fb44ff85 JH |
295 | .port_probe = digi_port_probe, |
296 | .port_remove = digi_port_remove, | |
1da177e4 LT |
297 | }; |
298 | ||
ea65370d | 299 | static struct usb_serial_driver digi_acceleport_4_device = { |
18fcac35 | 300 | .driver = { |
269bda1c GKH |
301 | .owner = THIS_MODULE, |
302 | .name = "digi_4", | |
18fcac35 | 303 | }, |
269bda1c | 304 | .description = "Digi 4 port USB adapter", |
1da177e4 | 305 | .id_table = id_table_4, |
1da177e4 LT |
306 | .num_ports = 4, |
307 | .open = digi_open, | |
308 | .close = digi_close, | |
309 | .write = digi_write, | |
310 | .write_room = digi_write_room, | |
311 | .write_bulk_callback = digi_write_bulk_callback, | |
312 | .read_bulk_callback = digi_read_bulk_callback, | |
313 | .chars_in_buffer = digi_chars_in_buffer, | |
314 | .throttle = digi_rx_throttle, | |
315 | .unthrottle = digi_rx_unthrottle, | |
1da177e4 LT |
316 | .set_termios = digi_set_termios, |
317 | .break_ctl = digi_break_ctl, | |
318 | .tiocmget = digi_tiocmget, | |
319 | .tiocmset = digi_tiocmset, | |
320 | .attach = digi_startup, | |
f9c99bb8 AS |
321 | .disconnect = digi_disconnect, |
322 | .release = digi_release, | |
fb44ff85 JH |
323 | .port_probe = digi_port_probe, |
324 | .port_remove = digi_port_remove, | |
1da177e4 LT |
325 | }; |
326 | ||
97b6b6d2 AS |
327 | static struct usb_serial_driver * const serial_drivers[] = { |
328 | &digi_acceleport_2_device, &digi_acceleport_4_device, NULL | |
329 | }; | |
1da177e4 LT |
330 | |
331 | /* Functions */ | |
332 | ||
333 | /* | |
41ad427d AC |
334 | * Cond Wait Interruptible Timeout Irqrestore |
335 | * | |
336 | * Do spin_unlock_irqrestore and interruptible_sleep_on_timeout | |
337 | * so that wake ups are not lost if they occur between the unlock | |
338 | * and the sleep. In other words, spin_unlock_irqrestore and | |
339 | * interruptible_sleep_on_timeout are "atomic" with respect to | |
340 | * wake ups. This is used to implement condition variables. | |
341 | * | |
342 | * interruptible_sleep_on_timeout is deprecated and has been replaced | |
343 | * with the equivalent code. | |
344 | */ | |
1da177e4 | 345 | |
c6d61269 | 346 | static long cond_wait_interruptible_timeout_irqrestore( |
1da177e4 | 347 | wait_queue_head_t *q, long timeout, |
c6d61269 | 348 | spinlock_t *lock, unsigned long flags) |
5a33956a | 349 | __releases(lock) |
1da177e4 LT |
350 | { |
351 | DEFINE_WAIT(wait); | |
352 | ||
45f23f18 | 353 | prepare_to_wait(q, &wait, TASK_INTERRUPTIBLE); |
1da177e4 LT |
354 | spin_unlock_irqrestore(lock, flags); |
355 | timeout = schedule_timeout(timeout); | |
356 | finish_wait(q, &wait); | |
357 | ||
358 | return timeout; | |
1da177e4 LT |
359 | } |
360 | ||
361 | ||
362 | /* | |
41ad427d AC |
363 | * Digi Wakeup Write |
364 | * | |
365 | * Wake up port, line discipline, and tty processes sleeping | |
366 | * on writes. | |
367 | */ | |
1da177e4 | 368 | |
c4028958 | 369 | static void digi_wakeup_write_lock(struct work_struct *work) |
1da177e4 | 370 | { |
41ad427d AC |
371 | struct digi_port *priv = |
372 | container_of(work, struct digi_port, dp_wakeup_work); | |
c4028958 | 373 | struct usb_serial_port *port = priv->dp_port; |
1da177e4 | 374 | unsigned long flags; |
1da177e4 | 375 | |
c6d61269 AC |
376 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
377 | digi_wakeup_write(port); | |
378 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); | |
1da177e4 LT |
379 | } |
380 | ||
c6d61269 | 381 | static void digi_wakeup_write(struct usb_serial_port *port) |
1da177e4 | 382 | { |
4a90f09b | 383 | struct tty_struct *tty = tty_port_tty_get(&port->port); |
4287341d AC |
384 | if (tty) { |
385 | tty_wakeup(tty); | |
386 | tty_kref_put(tty); | |
387 | } | |
1da177e4 LT |
388 | } |
389 | ||
390 | ||
391 | /* | |
41ad427d AC |
392 | * Digi Write OOB Command |
393 | * | |
394 | * Write commands on the out of band port. Commands are 4 | |
395 | * bytes each, multiple commands can be sent at once, and | |
396 | * no command will be split across USB packets. Returns 0 | |
397 | * if successful, -EINTR if interrupted while sleeping and | |
398 | * the interruptible flag is true, or a negative error | |
399 | * returned by usb_submit_urb. | |
400 | */ | |
1da177e4 | 401 | |
c6d61269 AC |
402 | static int digi_write_oob_command(struct usb_serial_port *port, |
403 | unsigned char *buf, int count, int interruptible) | |
1da177e4 | 404 | { |
1da177e4 LT |
405 | int ret = 0; |
406 | int len; | |
407 | struct usb_serial_port *oob_port = (struct usb_serial_port *)((struct digi_serial *)(usb_get_serial_data(port->serial)))->ds_oob_port; | |
408 | struct digi_port *oob_priv = usb_get_serial_port_data(oob_port); | |
409 | unsigned long flags = 0; | |
410 | ||
f9dfbebb GKH |
411 | dev_dbg(&port->dev, |
412 | "digi_write_oob_command: TOP: port=%d, count=%d\n", | |
413 | oob_priv->dp_port_num, count); | |
1da177e4 | 414 | |
c6d61269 | 415 | spin_lock_irqsave(&oob_priv->dp_port_lock, flags); |
41ad427d | 416 | while (count > 0) { |
50de36f7 | 417 | while (oob_priv->dp_write_urb_in_use) { |
1da177e4 LT |
418 | cond_wait_interruptible_timeout_irqrestore( |
419 | &oob_port->write_wait, DIGI_RETRY_TIMEOUT, | |
c6d61269 AC |
420 | &oob_priv->dp_port_lock, flags); |
421 | if (interruptible && signal_pending(current)) | |
422 | return -EINTR; | |
423 | spin_lock_irqsave(&oob_priv->dp_port_lock, flags); | |
1da177e4 LT |
424 | } |
425 | ||
426 | /* len must be a multiple of 4, so commands are not split */ | |
c6d61269 AC |
427 | len = min(count, oob_port->bulk_out_size); |
428 | if (len > 4) | |
1da177e4 | 429 | len &= ~3; |
c6d61269 | 430 | memcpy(oob_port->write_urb->transfer_buffer, buf, len); |
1da177e4 | 431 | oob_port->write_urb->transfer_buffer_length = len; |
41ad427d AC |
432 | ret = usb_submit_urb(oob_port->write_urb, GFP_ATOMIC); |
433 | if (ret == 0) { | |
1da177e4 LT |
434 | oob_priv->dp_write_urb_in_use = 1; |
435 | count -= len; | |
436 | buf += len; | |
437 | } | |
1da177e4 | 438 | } |
c6d61269 AC |
439 | spin_unlock_irqrestore(&oob_priv->dp_port_lock, flags); |
440 | if (ret) | |
194343d9 GKH |
441 | dev_err(&port->dev, "%s: usb_submit_urb failed, ret=%d\n", |
442 | __func__, ret); | |
c6d61269 | 443 | return ret; |
1da177e4 LT |
444 | |
445 | } | |
446 | ||
447 | ||
448 | /* | |
41ad427d AC |
449 | * Digi Write In Band Command |
450 | * | |
451 | * Write commands on the given port. Commands are 4 | |
452 | * bytes each, multiple commands can be sent at once, and | |
453 | * no command will be split across USB packets. If timeout | |
454 | * is non-zero, write in band command will return after | |
455 | * waiting unsuccessfully for the URB status to clear for | |
456 | * timeout ticks. Returns 0 if successful, or a negative | |
457 | * error returned by digi_write. | |
458 | */ | |
1da177e4 | 459 | |
c6d61269 AC |
460 | static int digi_write_inb_command(struct usb_serial_port *port, |
461 | unsigned char *buf, int count, unsigned long timeout) | |
1da177e4 | 462 | { |
1da177e4 LT |
463 | int ret = 0; |
464 | int len; | |
465 | struct digi_port *priv = usb_get_serial_port_data(port); | |
466 | unsigned char *data = port->write_urb->transfer_buffer; | |
467 | unsigned long flags = 0; | |
468 | ||
f9dfbebb | 469 | dev_dbg(&port->dev, "digi_write_inb_command: TOP: port=%d, count=%d\n", |
c6d61269 | 470 | priv->dp_port_num, count); |
1da177e4 | 471 | |
c6d61269 | 472 | if (timeout) |
1da177e4 LT |
473 | timeout += jiffies; |
474 | else | |
475 | timeout = ULONG_MAX; | |
476 | ||
c6d61269 | 477 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
41ad427d | 478 | while (count > 0 && ret == 0) { |
50de36f7 GKH |
479 | while (priv->dp_write_urb_in_use && |
480 | time_before(jiffies, timeout)) { | |
1da177e4 LT |
481 | cond_wait_interruptible_timeout_irqrestore( |
482 | &port->write_wait, DIGI_RETRY_TIMEOUT, | |
c6d61269 AC |
483 | &priv->dp_port_lock, flags); |
484 | if (signal_pending(current)) | |
485 | return -EINTR; | |
486 | spin_lock_irqsave(&priv->dp_port_lock, flags); | |
1da177e4 LT |
487 | } |
488 | ||
489 | /* len must be a multiple of 4 and small enough to */ | |
490 | /* guarantee the write will send buffered data first, */ | |
491 | /* so commands are in order with data and not split */ | |
c6d61269 AC |
492 | len = min(count, port->bulk_out_size-2-priv->dp_out_buf_len); |
493 | if (len > 4) | |
1da177e4 LT |
494 | len &= ~3; |
495 | ||
496 | /* write any buffered data first */ | |
c6d61269 | 497 | if (priv->dp_out_buf_len > 0) { |
1da177e4 LT |
498 | data[0] = DIGI_CMD_SEND_DATA; |
499 | data[1] = priv->dp_out_buf_len; | |
c6d61269 AC |
500 | memcpy(data + 2, priv->dp_out_buf, |
501 | priv->dp_out_buf_len); | |
502 | memcpy(data + 2 + priv->dp_out_buf_len, buf, len); | |
1da177e4 | 503 | port->write_urb->transfer_buffer_length |
c6d61269 | 504 | = priv->dp_out_buf_len + 2 + len; |
1da177e4 | 505 | } else { |
c6d61269 | 506 | memcpy(data, buf, len); |
1da177e4 LT |
507 | port->write_urb->transfer_buffer_length = len; |
508 | } | |
1da177e4 | 509 | |
41ad427d AC |
510 | ret = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
511 | if (ret == 0) { | |
1da177e4 LT |
512 | priv->dp_write_urb_in_use = 1; |
513 | priv->dp_out_buf_len = 0; | |
514 | count -= len; | |
515 | buf += len; | |
516 | } | |
517 | ||
518 | } | |
c6d61269 | 519 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
1da177e4 | 520 | |
c6d61269 | 521 | if (ret) |
194343d9 GKH |
522 | dev_err(&port->dev, |
523 | "%s: usb_submit_urb failed, ret=%d, port=%d\n", | |
441b62c1 | 524 | __func__, ret, priv->dp_port_num); |
c6d61269 | 525 | return ret; |
1da177e4 LT |
526 | } |
527 | ||
528 | ||
529 | /* | |
41ad427d AC |
530 | * Digi Set Modem Signals |
531 | * | |
532 | * Sets or clears DTR and RTS on the port, according to the | |
533 | * modem_signals argument. Use TIOCM_DTR and TIOCM_RTS flags | |
534 | * for the modem_signals argument. Returns 0 if successful, | |
535 | * -EINTR if interrupted while sleeping, or a non-zero error | |
536 | * returned by usb_submit_urb. | |
537 | */ | |
1da177e4 | 538 | |
c6d61269 AC |
539 | static int digi_set_modem_signals(struct usb_serial_port *port, |
540 | unsigned int modem_signals, int interruptible) | |
1da177e4 LT |
541 | { |
542 | ||
543 | int ret; | |
544 | struct digi_port *port_priv = usb_get_serial_port_data(port); | |
41ad427d | 545 | struct usb_serial_port *oob_port = (struct usb_serial_port *) ((struct digi_serial *)(usb_get_serial_data(port->serial)))->ds_oob_port; |
1da177e4 LT |
546 | struct digi_port *oob_priv = usb_get_serial_port_data(oob_port); |
547 | unsigned char *data = oob_port->write_urb->transfer_buffer; | |
548 | unsigned long flags = 0; | |
549 | ||
550 | ||
f9dfbebb GKH |
551 | dev_dbg(&port->dev, |
552 | "digi_set_modem_signals: TOP: port=%d, modem_signals=0x%x\n", | |
c6d61269 | 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); |
f9dfbebb | 690 | struct device *dev = &port->dev; |
adc8d746 AC |
691 | unsigned int iflag = tty->termios.c_iflag; |
692 | unsigned int cflag = tty->termios.c_cflag; | |
1da177e4 LT |
693 | unsigned int old_iflag = old_termios->c_iflag; |
694 | unsigned int old_cflag = old_termios->c_cflag; | |
695 | unsigned char buf[32]; | |
696 | unsigned int modem_signals; | |
41ad427d | 697 | int arg, ret; |
1da177e4 | 698 | int i = 0; |
c6d61269 | 699 | speed_t baud; |
1da177e4 | 700 | |
f9dfbebb GKH |
701 | dev_dbg(dev, |
702 | "digi_set_termios: TOP: port=%d, iflag=0x%x, old_iflag=0x%x, cflag=0x%x, old_cflag=0x%x\n", | |
703 | priv->dp_port_num, iflag, old_iflag, cflag, old_cflag); | |
1da177e4 LT |
704 | |
705 | /* set baud rate */ | |
41ad427d AC |
706 | baud = tty_get_baud_rate(tty); |
707 | if (baud != tty_termios_baud_rate(old_termios)) { | |
1da177e4 LT |
708 | arg = -1; |
709 | ||
710 | /* reassert DTR and (maybe) RTS on transition from B0 */ | |
c6d61269 | 711 | if ((old_cflag&CBAUD) == B0) { |
1da177e4 LT |
712 | /* don't set RTS if using hardware flow control */ |
713 | /* and throttling input */ | |
714 | modem_signals = TIOCM_DTR; | |
adc8d746 | 715 | if (!(tty->termios.c_cflag & CRTSCTS) || |
c6d61269 | 716 | !test_bit(TTY_THROTTLED, &tty->flags)) |
1da177e4 | 717 | modem_signals |= TIOCM_RTS; |
c6d61269 | 718 | digi_set_modem_signals(port, modem_signals, 1); |
1da177e4 | 719 | } |
c6d61269 | 720 | switch (baud) { |
41ad427d AC |
721 | /* drop DTR and RTS on transition to B0 */ |
722 | case 0: digi_set_modem_signals(port, 0, 1); break; | |
723 | case 50: arg = DIGI_BAUD_50; break; | |
724 | case 75: arg = DIGI_BAUD_75; break; | |
725 | case 110: arg = DIGI_BAUD_110; break; | |
726 | case 150: arg = DIGI_BAUD_150; break; | |
727 | case 200: arg = DIGI_BAUD_200; break; | |
728 | case 300: arg = DIGI_BAUD_300; break; | |
729 | case 600: arg = DIGI_BAUD_600; break; | |
730 | case 1200: arg = DIGI_BAUD_1200; break; | |
731 | case 1800: arg = DIGI_BAUD_1800; break; | |
732 | case 2400: arg = DIGI_BAUD_2400; break; | |
733 | case 4800: arg = DIGI_BAUD_4800; break; | |
734 | case 9600: arg = DIGI_BAUD_9600; break; | |
735 | case 19200: arg = DIGI_BAUD_19200; break; | |
736 | case 38400: arg = DIGI_BAUD_38400; break; | |
737 | case 57600: arg = DIGI_BAUD_57600; break; | |
738 | case 115200: arg = DIGI_BAUD_115200; break; | |
739 | case 230400: arg = DIGI_BAUD_230400; break; | |
740 | case 460800: arg = DIGI_BAUD_460800; break; | |
741 | default: | |
742 | arg = DIGI_BAUD_9600; | |
743 | baud = 9600; | |
744 | break; | |
1da177e4 | 745 | } |
c6d61269 | 746 | if (arg != -1) { |
1da177e4 LT |
747 | buf[i++] = DIGI_CMD_SET_BAUD_RATE; |
748 | buf[i++] = priv->dp_port_num; | |
749 | buf[i++] = arg; | |
750 | buf[i++] = 0; | |
751 | } | |
1da177e4 | 752 | } |
1da177e4 | 753 | /* set parity */ |
adc8d746 | 754 | tty->termios.c_cflag &= ~CMSPAR; |
7fa36a99 | 755 | |
c6d61269 AC |
756 | if ((cflag&(PARENB|PARODD)) != (old_cflag&(PARENB|PARODD))) { |
757 | if (cflag&PARENB) { | |
758 | if (cflag&PARODD) | |
1da177e4 LT |
759 | arg = DIGI_PARITY_ODD; |
760 | else | |
761 | arg = DIGI_PARITY_EVEN; | |
762 | } else { | |
763 | arg = DIGI_PARITY_NONE; | |
764 | } | |
1da177e4 LT |
765 | buf[i++] = DIGI_CMD_SET_PARITY; |
766 | buf[i++] = priv->dp_port_num; | |
767 | buf[i++] = arg; | |
768 | buf[i++] = 0; | |
1da177e4 | 769 | } |
1da177e4 | 770 | /* set word size */ |
c6d61269 | 771 | if ((cflag&CSIZE) != (old_cflag&CSIZE)) { |
1da177e4 | 772 | arg = -1; |
c6d61269 | 773 | switch (cflag&CSIZE) { |
1da177e4 LT |
774 | case CS5: arg = DIGI_WORD_SIZE_5; break; |
775 | case CS6: arg = DIGI_WORD_SIZE_6; break; | |
776 | case CS7: arg = DIGI_WORD_SIZE_7; break; | |
777 | case CS8: arg = DIGI_WORD_SIZE_8; break; | |
778 | default: | |
f9dfbebb GKH |
779 | dev_dbg(dev, |
780 | "digi_set_termios: can't handle word size %d\n", | |
c6d61269 | 781 | (cflag&CSIZE)); |
1da177e4 LT |
782 | break; |
783 | } | |
784 | ||
c6d61269 | 785 | if (arg != -1) { |
1da177e4 LT |
786 | buf[i++] = DIGI_CMD_SET_WORD_SIZE; |
787 | buf[i++] = priv->dp_port_num; | |
788 | buf[i++] = arg; | |
789 | buf[i++] = 0; | |
790 | } | |
791 | ||
792 | } | |
793 | ||
794 | /* set stop bits */ | |
c6d61269 | 795 | if ((cflag&CSTOPB) != (old_cflag&CSTOPB)) { |
1da177e4 | 796 | |
c6d61269 | 797 | if ((cflag&CSTOPB)) |
1da177e4 LT |
798 | arg = DIGI_STOP_BITS_2; |
799 | else | |
800 | arg = DIGI_STOP_BITS_1; | |
801 | ||
802 | buf[i++] = DIGI_CMD_SET_STOP_BITS; | |
803 | buf[i++] = priv->dp_port_num; | |
804 | buf[i++] = arg; | |
805 | buf[i++] = 0; | |
806 | ||
807 | } | |
808 | ||
809 | /* set input flow control */ | |
c6d61269 AC |
810 | if ((iflag&IXOFF) != (old_iflag&IXOFF) |
811 | || (cflag&CRTSCTS) != (old_cflag&CRTSCTS)) { | |
1da177e4 | 812 | arg = 0; |
c6d61269 | 813 | if (iflag&IXOFF) |
1da177e4 LT |
814 | arg |= DIGI_INPUT_FLOW_CONTROL_XON_XOFF; |
815 | else | |
816 | arg &= ~DIGI_INPUT_FLOW_CONTROL_XON_XOFF; | |
817 | ||
c6d61269 | 818 | if (cflag&CRTSCTS) { |
1da177e4 LT |
819 | arg |= DIGI_INPUT_FLOW_CONTROL_RTS; |
820 | ||
821 | /* On USB-4 it is necessary to assert RTS prior */ | |
822 | /* to selecting RTS input flow control. */ | |
823 | buf[i++] = DIGI_CMD_SET_RTS_SIGNAL; | |
824 | buf[i++] = priv->dp_port_num; | |
825 | buf[i++] = DIGI_RTS_ACTIVE; | |
826 | buf[i++] = 0; | |
827 | ||
828 | } else { | |
829 | arg &= ~DIGI_INPUT_FLOW_CONTROL_RTS; | |
830 | } | |
1da177e4 LT |
831 | buf[i++] = DIGI_CMD_SET_INPUT_FLOW_CONTROL; |
832 | buf[i++] = priv->dp_port_num; | |
833 | buf[i++] = arg; | |
834 | buf[i++] = 0; | |
1da177e4 LT |
835 | } |
836 | ||
837 | /* set output flow control */ | |
7fa36a99 AC |
838 | if ((iflag & IXON) != (old_iflag & IXON) |
839 | || (cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { | |
1da177e4 | 840 | arg = 0; |
7fa36a99 | 841 | if (iflag & IXON) |
1da177e4 LT |
842 | arg |= DIGI_OUTPUT_FLOW_CONTROL_XON_XOFF; |
843 | else | |
844 | arg &= ~DIGI_OUTPUT_FLOW_CONTROL_XON_XOFF; | |
845 | ||
7fa36a99 | 846 | if (cflag & CRTSCTS) { |
1da177e4 LT |
847 | arg |= DIGI_OUTPUT_FLOW_CONTROL_CTS; |
848 | } else { | |
849 | arg &= ~DIGI_OUTPUT_FLOW_CONTROL_CTS; | |
c6d61269 | 850 | tty->hw_stopped = 0; |
1da177e4 LT |
851 | } |
852 | ||
853 | buf[i++] = DIGI_CMD_SET_OUTPUT_FLOW_CONTROL; | |
854 | buf[i++] = priv->dp_port_num; | |
855 | buf[i++] = arg; | |
856 | buf[i++] = 0; | |
1da177e4 LT |
857 | } |
858 | ||
859 | /* set receive enable/disable */ | |
7fa36a99 AC |
860 | if ((cflag & CREAD) != (old_cflag & CREAD)) { |
861 | if (cflag & CREAD) | |
1da177e4 LT |
862 | arg = DIGI_ENABLE; |
863 | else | |
864 | arg = DIGI_DISABLE; | |
865 | ||
866 | buf[i++] = DIGI_CMD_RECEIVE_ENABLE; | |
867 | buf[i++] = priv->dp_port_num; | |
868 | buf[i++] = arg; | |
869 | buf[i++] = 0; | |
1da177e4 | 870 | } |
41ad427d AC |
871 | ret = digi_write_oob_command(port, buf, i, 1); |
872 | if (ret != 0) | |
f9dfbebb | 873 | dev_dbg(dev, "digi_set_termios: write oob failed, ret=%d\n", ret); |
7fa36a99 | 874 | tty_encode_baud_rate(tty, baud, baud); |
1da177e4 LT |
875 | } |
876 | ||
877 | ||
95da310e | 878 | static void digi_break_ctl(struct tty_struct *tty, int break_state) |
1da177e4 | 879 | { |
95da310e | 880 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
881 | unsigned char buf[4]; |
882 | ||
1da177e4 LT |
883 | buf[0] = DIGI_CMD_BREAK_CONTROL; |
884 | buf[1] = 2; /* length */ | |
885 | buf[2] = break_state ? 1 : 0; | |
886 | buf[3] = 0; /* pad */ | |
c6d61269 | 887 | digi_write_inb_command(port, buf, 4, 0); |
1da177e4 LT |
888 | } |
889 | ||
890 | ||
60b33c13 | 891 | static int digi_tiocmget(struct tty_struct *tty) |
1da177e4 | 892 | { |
95da310e | 893 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
894 | struct digi_port *priv = usb_get_serial_port_data(port); |
895 | unsigned int val; | |
896 | unsigned long flags; | |
897 | ||
c6d61269 | 898 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 | 899 | val = priv->dp_modem_signals; |
c6d61269 | 900 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
1da177e4 LT |
901 | return val; |
902 | } | |
903 | ||
904 | ||
20b9d177 AC |
905 | static int digi_tiocmset(struct tty_struct *tty, |
906 | unsigned int set, unsigned int clear) | |
1da177e4 | 907 | { |
95da310e | 908 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
909 | struct digi_port *priv = usb_get_serial_port_data(port); |
910 | unsigned int val; | |
911 | unsigned long flags; | |
912 | ||
c6d61269 | 913 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 | 914 | val = (priv->dp_modem_signals & ~clear) | set; |
c6d61269 AC |
915 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
916 | return digi_set_modem_signals(port, val, 1); | |
1da177e4 LT |
917 | } |
918 | ||
919 | ||
95da310e AC |
920 | static int digi_write(struct tty_struct *tty, struct usb_serial_port *port, |
921 | const unsigned char *buf, int count) | |
1da177e4 LT |
922 | { |
923 | ||
41ad427d | 924 | int ret, data_len, new_len; |
1da177e4 LT |
925 | struct digi_port *priv = usb_get_serial_port_data(port); |
926 | unsigned char *data = port->write_urb->transfer_buffer; | |
927 | unsigned long flags = 0; | |
928 | ||
f9dfbebb GKH |
929 | dev_dbg(&port->dev, |
930 | "digi_write: TOP: port=%d, count=%d, in_interrupt=%ld\n", | |
c6d61269 | 931 | priv->dp_port_num, count, in_interrupt()); |
1da177e4 LT |
932 | |
933 | /* copy user data (which can sleep) before getting spin lock */ | |
c6d61269 AC |
934 | count = min(count, port->bulk_out_size-2); |
935 | count = min(64, count); | |
1da177e4 LT |
936 | |
937 | /* be sure only one write proceeds at a time */ | |
938 | /* there are races on the port private buffer */ | |
c6d61269 | 939 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 LT |
940 | |
941 | /* wait for urb status clear to submit another urb */ | |
50de36f7 | 942 | if (priv->dp_write_urb_in_use) { |
1da177e4 | 943 | /* buffer data if count is 1 (probably put_char) if possible */ |
c6d61269 | 944 | if (count == 1 && priv->dp_out_buf_len < DIGI_OUT_BUF_SIZE) { |
1da177e4 LT |
945 | priv->dp_out_buf[priv->dp_out_buf_len++] = *buf; |
946 | new_len = 1; | |
947 | } else { | |
948 | new_len = 0; | |
949 | } | |
c6d61269 AC |
950 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
951 | return new_len; | |
1da177e4 LT |
952 | } |
953 | ||
954 | /* allow space for any buffered data and for new data, up to */ | |
955 | /* transfer buffer size - 2 (for command and length bytes) */ | |
956 | new_len = min(count, port->bulk_out_size-2-priv->dp_out_buf_len); | |
957 | data_len = new_len + priv->dp_out_buf_len; | |
958 | ||
c6d61269 AC |
959 | if (data_len == 0) { |
960 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); | |
961 | return 0; | |
1da177e4 LT |
962 | } |
963 | ||
964 | port->write_urb->transfer_buffer_length = data_len+2; | |
1da177e4 LT |
965 | |
966 | *data++ = DIGI_CMD_SEND_DATA; | |
967 | *data++ = data_len; | |
968 | ||
969 | /* copy in buffered data first */ | |
c6d61269 | 970 | memcpy(data, priv->dp_out_buf, priv->dp_out_buf_len); |
1da177e4 LT |
971 | data += priv->dp_out_buf_len; |
972 | ||
973 | /* copy in new data */ | |
c6d61269 | 974 | memcpy(data, buf, new_len); |
1da177e4 | 975 | |
41ad427d AC |
976 | ret = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
977 | if (ret == 0) { | |
1da177e4 LT |
978 | priv->dp_write_urb_in_use = 1; |
979 | ret = new_len; | |
980 | priv->dp_out_buf_len = 0; | |
981 | } | |
982 | ||
983 | /* return length of new data written, or error */ | |
c6d61269 AC |
984 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
985 | if (ret < 0) | |
22a416c4 | 986 | dev_err_console(port, |
194343d9 | 987 | "%s: usb_submit_urb failed, ret=%d, port=%d\n", |
441b62c1 | 988 | __func__, ret, priv->dp_port_num); |
f9dfbebb | 989 | dev_dbg(&port->dev, "digi_write: returning %d\n", ret); |
c6d61269 | 990 | return ret; |
1da177e4 | 991 | |
41ad427d | 992 | } |
1da177e4 | 993 | |
c6d61269 | 994 | static void digi_write_bulk_callback(struct urb *urb) |
1da177e4 LT |
995 | { |
996 | ||
cdc97792 | 997 | struct usb_serial_port *port = urb->context; |
1da177e4 LT |
998 | struct usb_serial *serial; |
999 | struct digi_port *priv; | |
1000 | struct digi_serial *serial_priv; | |
1001 | int ret = 0; | |
85d75107 | 1002 | int status = urb->status; |
1da177e4 | 1003 | |
1da177e4 | 1004 | /* port and serial sanity check */ |
41ad427d | 1005 | if (port == NULL || (priv = usb_get_serial_port_data(port)) == NULL) { |
109f34e7 | 1006 | pr_err("%s: port or port->private is NULL, status=%d\n", |
194343d9 | 1007 | __func__, status); |
1da177e4 LT |
1008 | return; |
1009 | } | |
1010 | serial = port->serial; | |
41ad427d | 1011 | if (serial == NULL || (serial_priv = usb_get_serial_data(serial)) == NULL) { |
194343d9 GKH |
1012 | dev_err(&port->dev, |
1013 | "%s: serial or serial->private is NULL, status=%d\n", | |
1014 | __func__, status); | |
1da177e4 LT |
1015 | return; |
1016 | } | |
1017 | ||
1018 | /* handle oob callback */ | |
c6d61269 | 1019 | if (priv->dp_port_num == serial_priv->ds_oob_port_num) { |
f9dfbebb | 1020 | dev_dbg(&port->dev, "digi_write_bulk_callback: oob callback\n"); |
c6d61269 | 1021 | spin_lock(&priv->dp_port_lock); |
1da177e4 | 1022 | priv->dp_write_urb_in_use = 0; |
c6d61269 AC |
1023 | wake_up_interruptible(&port->write_wait); |
1024 | spin_unlock(&priv->dp_port_lock); | |
1da177e4 LT |
1025 | return; |
1026 | } | |
1027 | ||
1f87158e | 1028 | /* try to send any buffered data on this port */ |
c6d61269 | 1029 | spin_lock(&priv->dp_port_lock); |
1da177e4 | 1030 | priv->dp_write_urb_in_use = 0; |
1f87158e | 1031 | if (priv->dp_out_buf_len > 0) { |
1da177e4 LT |
1032 | *((unsigned char *)(port->write_urb->transfer_buffer)) |
1033 | = (unsigned char)DIGI_CMD_SEND_DATA; | |
41ad427d | 1034 | *((unsigned char *)(port->write_urb->transfer_buffer) + 1) |
1da177e4 | 1035 | = (unsigned char)priv->dp_out_buf_len; |
41ad427d AC |
1036 | port->write_urb->transfer_buffer_length = |
1037 | priv->dp_out_buf_len + 2; | |
41ad427d | 1038 | memcpy(port->write_urb->transfer_buffer + 2, priv->dp_out_buf, |
c6d61269 | 1039 | priv->dp_out_buf_len); |
41ad427d AC |
1040 | ret = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
1041 | if (ret == 0) { | |
1da177e4 LT |
1042 | priv->dp_write_urb_in_use = 1; |
1043 | priv->dp_out_buf_len = 0; | |
1044 | } | |
1da177e4 | 1045 | } |
1da177e4 | 1046 | /* wake up processes sleeping on writes immediately */ |
c6d61269 | 1047 | digi_wakeup_write(port); |
1da177e4 LT |
1048 | /* also queue up a wakeup at scheduler time, in case we */ |
1049 | /* lost the race in write_chan(). */ | |
1050 | schedule_work(&priv->dp_wakeup_work); | |
1051 | ||
c6d61269 | 1052 | spin_unlock(&priv->dp_port_lock); |
1f87158e | 1053 | if (ret && ret != -EPERM) |
22a416c4 | 1054 | dev_err_console(port, |
194343d9 | 1055 | "%s: usb_submit_urb failed, ret=%d, port=%d\n", |
441b62c1 | 1056 | __func__, ret, priv->dp_port_num); |
1da177e4 LT |
1057 | } |
1058 | ||
95da310e | 1059 | static int digi_write_room(struct tty_struct *tty) |
1da177e4 | 1060 | { |
95da310e | 1061 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 1062 | struct digi_port *priv = usb_get_serial_port_data(port); |
95da310e | 1063 | int room; |
1da177e4 LT |
1064 | unsigned long flags = 0; |
1065 | ||
c6d61269 | 1066 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 | 1067 | |
50de36f7 | 1068 | if (priv->dp_write_urb_in_use) |
1da177e4 LT |
1069 | room = 0; |
1070 | else | |
1071 | room = port->bulk_out_size - 2 - priv->dp_out_buf_len; | |
1072 | ||
c6d61269 | 1073 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
f9dfbebb | 1074 | dev_dbg(&port->dev, "digi_write_room: port=%d, room=%d\n", priv->dp_port_num, room); |
c6d61269 | 1075 | return room; |
1da177e4 LT |
1076 | |
1077 | } | |
1078 | ||
95da310e | 1079 | static int digi_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 1080 | { |
95da310e | 1081 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
1082 | struct digi_port *priv = usb_get_serial_port_data(port); |
1083 | ||
50de36f7 | 1084 | if (priv->dp_write_urb_in_use) { |
f9dfbebb | 1085 | dev_dbg(&port->dev, "digi_chars_in_buffer: port=%d, chars=%d\n", |
c6d61269 AC |
1086 | priv->dp_port_num, port->bulk_out_size - 2); |
1087 | /* return(port->bulk_out_size - 2); */ | |
1088 | return 256; | |
1da177e4 | 1089 | } else { |
f9dfbebb | 1090 | dev_dbg(&port->dev, "digi_chars_in_buffer: port=%d, chars=%d\n", |
c6d61269 AC |
1091 | priv->dp_port_num, priv->dp_out_buf_len); |
1092 | return priv->dp_out_buf_len; | |
1da177e4 LT |
1093 | } |
1094 | ||
1095 | } | |
1096 | ||
335f8514 AC |
1097 | static void digi_dtr_rts(struct usb_serial_port *port, int on) |
1098 | { | |
1099 | /* Adjust DTR and RTS */ | |
1100 | digi_set_modem_signals(port, on * (TIOCM_DTR|TIOCM_RTS), 1); | |
1101 | } | |
1102 | ||
a509a7e4 | 1103 | static int digi_open(struct tty_struct *tty, struct usb_serial_port *port) |
1da177e4 | 1104 | { |
1da177e4 LT |
1105 | int ret; |
1106 | unsigned char buf[32]; | |
1107 | struct digi_port *priv = usb_get_serial_port_data(port); | |
606d099c | 1108 | struct ktermios not_termios; |
1da177e4 | 1109 | |
1da177e4 | 1110 | /* be sure the device is started up */ |
c6d61269 AC |
1111 | if (digi_startup_device(port->serial) != 0) |
1112 | return -ENXIO; | |
1da177e4 | 1113 | |
1da177e4 LT |
1114 | /* read modem signals automatically whenever they change */ |
1115 | buf[0] = DIGI_CMD_READ_INPUT_SIGNALS; | |
1116 | buf[1] = priv->dp_port_num; | |
1117 | buf[2] = DIGI_ENABLE; | |
1118 | buf[3] = 0; | |
1119 | ||
1120 | /* flush fifos */ | |
1121 | buf[4] = DIGI_CMD_IFLUSH_FIFO; | |
1122 | buf[5] = priv->dp_port_num; | |
1123 | buf[6] = DIGI_FLUSH_TX | DIGI_FLUSH_RX; | |
1124 | buf[7] = 0; | |
1125 | ||
41ad427d AC |
1126 | ret = digi_write_oob_command(port, buf, 8, 1); |
1127 | if (ret != 0) | |
f9dfbebb | 1128 | dev_dbg(&port->dev, "digi_open: write oob failed, ret=%d\n", ret); |
1da177e4 LT |
1129 | |
1130 | /* set termios settings */ | |
95da310e | 1131 | if (tty) { |
adc8d746 AC |
1132 | not_termios.c_cflag = ~tty->termios.c_cflag; |
1133 | not_termios.c_iflag = ~tty->termios.c_iflag; | |
95da310e AC |
1134 | digi_set_termios(tty, port, ¬_termios); |
1135 | } | |
c6d61269 | 1136 | return 0; |
1da177e4 LT |
1137 | } |
1138 | ||
1139 | ||
335f8514 | 1140 | static void digi_close(struct usb_serial_port *port) |
1da177e4 LT |
1141 | { |
1142 | DEFINE_WAIT(wait); | |
1143 | int ret; | |
1144 | unsigned char buf[32]; | |
1da177e4 | 1145 | struct digi_port *priv = usb_get_serial_port_data(port); |
1da177e4 | 1146 | |
0915f490 | 1147 | mutex_lock(&port->serial->disc_mutex); |
1da177e4 | 1148 | /* if disconnected, just clear flags */ |
0915f490 | 1149 | if (port->serial->disconnected) |
1da177e4 LT |
1150 | goto exit; |
1151 | ||
1da177e4 | 1152 | if (port->serial->dev) { |
335f8514 AC |
1153 | /* FIXME: Transmit idle belongs in the wait_unti_sent path */ |
1154 | digi_transmit_idle(port, DIGI_CLOSE_TIMEOUT); | |
1da177e4 LT |
1155 | |
1156 | /* disable input flow control */ | |
1157 | buf[0] = DIGI_CMD_SET_INPUT_FLOW_CONTROL; | |
1158 | buf[1] = priv->dp_port_num; | |
1159 | buf[2] = DIGI_DISABLE; | |
1160 | buf[3] = 0; | |
1161 | ||
1162 | /* disable output flow control */ | |
1163 | buf[4] = DIGI_CMD_SET_OUTPUT_FLOW_CONTROL; | |
1164 | buf[5] = priv->dp_port_num; | |
1165 | buf[6] = DIGI_DISABLE; | |
1166 | buf[7] = 0; | |
1167 | ||
1168 | /* disable reading modem signals automatically */ | |
1169 | buf[8] = DIGI_CMD_READ_INPUT_SIGNALS; | |
1170 | buf[9] = priv->dp_port_num; | |
1171 | buf[10] = DIGI_DISABLE; | |
1172 | buf[11] = 0; | |
1173 | ||
1174 | /* disable receive */ | |
1175 | buf[12] = DIGI_CMD_RECEIVE_ENABLE; | |
1176 | buf[13] = priv->dp_port_num; | |
1177 | buf[14] = DIGI_DISABLE; | |
1178 | buf[15] = 0; | |
1179 | ||
1180 | /* flush fifos */ | |
1181 | buf[16] = DIGI_CMD_IFLUSH_FIFO; | |
1182 | buf[17] = priv->dp_port_num; | |
1183 | buf[18] = DIGI_FLUSH_TX | DIGI_FLUSH_RX; | |
1184 | buf[19] = 0; | |
1185 | ||
41ad427d AC |
1186 | ret = digi_write_oob_command(port, buf, 20, 0); |
1187 | if (ret != 0) | |
f9dfbebb | 1188 | dev_dbg(&port->dev, "digi_close: write oob failed, ret=%d\n", ret); |
1da177e4 LT |
1189 | |
1190 | /* wait for final commands on oob port to complete */ | |
41ad427d AC |
1191 | prepare_to_wait(&priv->dp_flush_wait, &wait, |
1192 | TASK_INTERRUPTIBLE); | |
1da177e4 LT |
1193 | schedule_timeout(DIGI_CLOSE_TIMEOUT); |
1194 | finish_wait(&priv->dp_flush_wait, &wait); | |
1195 | ||
1196 | /* shutdown any outstanding bulk writes */ | |
1197 | usb_kill_urb(port->write_urb); | |
1198 | } | |
1da177e4 | 1199 | exit: |
0915f490 | 1200 | spin_lock_irq(&priv->dp_port_lock); |
1da177e4 | 1201 | priv->dp_write_urb_in_use = 0; |
c6d61269 | 1202 | wake_up_interruptible(&priv->dp_close_wait); |
0915f490 ON |
1203 | spin_unlock_irq(&priv->dp_port_lock); |
1204 | mutex_unlock(&port->serial->disc_mutex); | |
1da177e4 LT |
1205 | } |
1206 | ||
1207 | ||
1208 | /* | |
41ad427d AC |
1209 | * Digi Startup Device |
1210 | * | |
1211 | * Starts reads on all ports. Must be called AFTER startup, with | |
1212 | * urbs initialized. Returns 0 if successful, non-zero error otherwise. | |
1213 | */ | |
1da177e4 | 1214 | |
c6d61269 | 1215 | static int digi_startup_device(struct usb_serial *serial) |
1da177e4 | 1216 | { |
41ad427d | 1217 | int i, ret = 0; |
1da177e4 LT |
1218 | struct digi_serial *serial_priv = usb_get_serial_data(serial); |
1219 | struct usb_serial_port *port; | |
1220 | ||
1da177e4 | 1221 | /* be sure this happens exactly once */ |
c6d61269 AC |
1222 | spin_lock(&serial_priv->ds_serial_lock); |
1223 | if (serial_priv->ds_device_started) { | |
1224 | spin_unlock(&serial_priv->ds_serial_lock); | |
1225 | return 0; | |
1da177e4 LT |
1226 | } |
1227 | serial_priv->ds_device_started = 1; | |
c6d61269 | 1228 | spin_unlock(&serial_priv->ds_serial_lock); |
1da177e4 LT |
1229 | |
1230 | /* start reading from each bulk in endpoint for the device */ | |
1231 | /* set USB_DISABLE_SPD flag for write bulk urbs */ | |
c6d61269 | 1232 | for (i = 0; i < serial->type->num_ports + 1; i++) { |
1da177e4 | 1233 | port = serial->port[i]; |
41ad427d AC |
1234 | ret = usb_submit_urb(port->read_urb, GFP_KERNEL); |
1235 | if (ret != 0) { | |
194343d9 GKH |
1236 | dev_err(&port->dev, |
1237 | "%s: usb_submit_urb failed, ret=%d, port=%d\n", | |
1238 | __func__, ret, i); | |
1da177e4 LT |
1239 | break; |
1240 | } | |
1da177e4 | 1241 | } |
c6d61269 | 1242 | return ret; |
1da177e4 LT |
1243 | } |
1244 | ||
fb44ff85 | 1245 | static int digi_port_init(struct usb_serial_port *port, unsigned port_num) |
1da177e4 | 1246 | { |
1da177e4 | 1247 | struct digi_port *priv; |
1da177e4 | 1248 | |
fb44ff85 JH |
1249 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
1250 | if (!priv) | |
1251 | return -ENOMEM; | |
1da177e4 | 1252 | |
fb44ff85 JH |
1253 | spin_lock_init(&priv->dp_port_lock); |
1254 | priv->dp_port_num = port_num; | |
1255 | init_waitqueue_head(&priv->dp_modem_change_wait); | |
1256 | init_waitqueue_head(&priv->dp_transmit_idle_wait); | |
1257 | init_waitqueue_head(&priv->dp_flush_wait); | |
1258 | init_waitqueue_head(&priv->dp_close_wait); | |
1259 | INIT_WORK(&priv->dp_wakeup_work, digi_wakeup_write_lock); | |
1260 | priv->dp_port = port; | |
1da177e4 | 1261 | |
fb44ff85 JH |
1262 | init_waitqueue_head(&port->write_wait); |
1263 | ||
1264 | usb_set_serial_port_data(port, priv); | |
1265 | ||
1266 | return 0; | |
1267 | } | |
1268 | ||
1269 | static int digi_startup(struct usb_serial *serial) | |
1270 | { | |
1271 | struct digi_serial *serial_priv; | |
1272 | int ret; | |
1273 | ||
1274 | serial_priv = kzalloc(sizeof(*serial_priv), GFP_KERNEL); | |
1275 | if (!serial_priv) | |
1276 | return -ENOMEM; | |
1da177e4 | 1277 | |
c6d61269 | 1278 | spin_lock_init(&serial_priv->ds_serial_lock); |
1da177e4 LT |
1279 | serial_priv->ds_oob_port_num = serial->type->num_ports; |
1280 | serial_priv->ds_oob_port = serial->port[serial_priv->ds_oob_port_num]; | |
fb44ff85 JH |
1281 | |
1282 | ret = digi_port_init(serial_priv->ds_oob_port, | |
1283 | serial_priv->ds_oob_port_num); | |
1284 | if (ret) { | |
1285 | kfree(serial_priv); | |
1286 | return ret; | |
1287 | } | |
1288 | ||
1da177e4 LT |
1289 | usb_set_serial_data(serial, serial_priv); |
1290 | ||
c6d61269 | 1291 | return 0; |
1da177e4 LT |
1292 | } |
1293 | ||
1294 | ||
f9c99bb8 | 1295 | static void digi_disconnect(struct usb_serial *serial) |
1da177e4 | 1296 | { |
1da177e4 | 1297 | int i; |
1da177e4 LT |
1298 | |
1299 | /* stop reads and writes on all ports */ | |
c6d61269 | 1300 | for (i = 0; i < serial->type->num_ports + 1; i++) { |
1da177e4 LT |
1301 | usb_kill_urb(serial->port[i]->read_urb); |
1302 | usb_kill_urb(serial->port[i]->write_urb); | |
1303 | } | |
f9c99bb8 AS |
1304 | } |
1305 | ||
1306 | ||
1307 | static void digi_release(struct usb_serial *serial) | |
1308 | { | |
fb44ff85 JH |
1309 | struct digi_serial *serial_priv; |
1310 | struct digi_port *priv; | |
1311 | ||
1312 | serial_priv = usb_get_serial_data(serial); | |
1313 | ||
1314 | priv = usb_get_serial_port_data(serial_priv->ds_oob_port); | |
1315 | kfree(priv); | |
1da177e4 | 1316 | |
fb44ff85 | 1317 | kfree(serial_priv); |
1da177e4 LT |
1318 | } |
1319 | ||
fb44ff85 JH |
1320 | static int digi_port_probe(struct usb_serial_port *port) |
1321 | { | |
1322 | unsigned port_num; | |
1323 | ||
1324 | port_num = port->number - port->serial->minor; | |
1325 | ||
1326 | return digi_port_init(port, port_num); | |
1327 | } | |
1328 | ||
1329 | static int digi_port_remove(struct usb_serial_port *port) | |
1330 | { | |
1331 | struct digi_port *priv; | |
1332 | ||
1333 | priv = usb_get_serial_port_data(port); | |
1334 | kfree(priv); | |
1335 | ||
1336 | return 0; | |
1337 | } | |
1da177e4 | 1338 | |
c6d61269 | 1339 | static void digi_read_bulk_callback(struct urb *urb) |
1da177e4 | 1340 | { |
cdc97792 | 1341 | struct usb_serial_port *port = urb->context; |
1da177e4 LT |
1342 | struct digi_port *priv; |
1343 | struct digi_serial *serial_priv; | |
1344 | int ret; | |
85d75107 | 1345 | int status = urb->status; |
1da177e4 | 1346 | |
1da177e4 | 1347 | /* port sanity check, do not resubmit if port is not valid */ |
194343d9 GKH |
1348 | if (port == NULL) |
1349 | return; | |
1350 | priv = usb_get_serial_port_data(port); | |
1351 | if (priv == NULL) { | |
1352 | dev_err(&port->dev, "%s: port->private is NULL, status=%d\n", | |
1353 | __func__, status); | |
1da177e4 LT |
1354 | return; |
1355 | } | |
c6d61269 | 1356 | if (port->serial == NULL || |
41ad427d | 1357 | (serial_priv = usb_get_serial_data(port->serial)) == NULL) { |
194343d9 GKH |
1358 | dev_err(&port->dev, "%s: serial is bad or serial->private " |
1359 | "is NULL, status=%d\n", __func__, status); | |
1da177e4 LT |
1360 | return; |
1361 | } | |
1362 | ||
1363 | /* do not resubmit urb if it has any status error */ | |
85d75107 | 1364 | if (status) { |
194343d9 GKH |
1365 | dev_err(&port->dev, |
1366 | "%s: nonzero read bulk status: status=%d, port=%d\n", | |
1367 | __func__, status, priv->dp_port_num); | |
1da177e4 LT |
1368 | return; |
1369 | } | |
1370 | ||
1371 | /* handle oob or inb callback, do not resubmit if error */ | |
c6d61269 AC |
1372 | if (priv->dp_port_num == serial_priv->ds_oob_port_num) { |
1373 | if (digi_read_oob_callback(urb) != 0) | |
1da177e4 LT |
1374 | return; |
1375 | } else { | |
c6d61269 | 1376 | if (digi_read_inb_callback(urb) != 0) |
1da177e4 LT |
1377 | return; |
1378 | } | |
1379 | ||
1380 | /* continue read */ | |
41ad427d | 1381 | ret = usb_submit_urb(urb, GFP_ATOMIC); |
1f87158e | 1382 | if (ret != 0 && ret != -EPERM) { |
194343d9 GKH |
1383 | dev_err(&port->dev, |
1384 | "%s: failed resubmitting urb, ret=%d, port=%d\n", | |
1385 | __func__, ret, priv->dp_port_num); | |
1da177e4 LT |
1386 | } |
1387 | ||
1388 | } | |
1389 | ||
41ad427d AC |
1390 | /* |
1391 | * Digi Read INB Callback | |
1392 | * | |
1393 | * Digi Read INB Callback handles reads on the in band ports, sending | |
1394 | * the data on to the tty subsystem. When called we know port and | |
1395 | * port->private are not NULL and port->serial has been validated. | |
1396 | * It returns 0 if successful, 1 if successful but the port is | |
1397 | * throttled, and -1 if the sanity checks failed. | |
1398 | */ | |
1da177e4 | 1399 | |
c6d61269 | 1400 | static int digi_read_inb_callback(struct urb *urb) |
1da177e4 | 1401 | { |
cdc97792 | 1402 | struct usb_serial_port *port = urb->context; |
1da177e4 LT |
1403 | struct digi_port *priv = usb_get_serial_port_data(port); |
1404 | int opcode = ((unsigned char *)urb->transfer_buffer)[0]; | |
1405 | int len = ((unsigned char *)urb->transfer_buffer)[1]; | |
85d75107 | 1406 | int port_status = ((unsigned char *)urb->transfer_buffer)[2]; |
41ad427d AC |
1407 | unsigned char *data = ((unsigned char *)urb->transfer_buffer) + 3; |
1408 | int flag, throttled; | |
85d75107 | 1409 | int status = urb->status; |
1da177e4 LT |
1410 | |
1411 | /* do not process callbacks on closed ports */ | |
1412 | /* but do continue the read chain */ | |
1f87158e | 1413 | if (urb->status == -ENOENT) |
c6d61269 | 1414 | return 0; |
1da177e4 LT |
1415 | |
1416 | /* short/multiple packet check */ | |
c6d61269 | 1417 | if (urb->actual_length != len + 2) { |
194343d9 | 1418 | dev_err(&port->dev, "%s: INCOMPLETE OR MULTIPLE PACKET, " |
50de36f7 | 1419 | "status=%d, port=%d, opcode=%d, len=%d, " |
194343d9 GKH |
1420 | "actual_length=%d, status=%d\n", __func__, status, |
1421 | priv->dp_port_num, opcode, len, urb->actual_length, | |
1422 | port_status); | |
c6d61269 | 1423 | return -1; |
1da177e4 LT |
1424 | } |
1425 | ||
c6d61269 | 1426 | spin_lock(&priv->dp_port_lock); |
1da177e4 LT |
1427 | |
1428 | /* check for throttle; if set, do not resubmit read urb */ | |
1429 | /* indicate the read chain needs to be restarted on unthrottle */ | |
1430 | throttled = priv->dp_throttled; | |
c6d61269 | 1431 | if (throttled) |
1da177e4 LT |
1432 | priv->dp_throttle_restart = 1; |
1433 | ||
1434 | /* receive data */ | |
2e124b4a | 1435 | if (opcode == DIGI_CMD_RECEIVE_DATA) { |
85d75107 | 1436 | /* get flag from port_status */ |
1da177e4 LT |
1437 | flag = 0; |
1438 | ||
1439 | /* overrun is special, not associated with a char */ | |
c6d61269 | 1440 | if (port_status & DIGI_OVERRUN_ERROR) |
92a19f9c | 1441 | tty_insert_flip_char(&port->port, 0, TTY_OVERRUN); |
1da177e4 LT |
1442 | |
1443 | /* break takes precedence over parity, */ | |
1444 | /* which takes precedence over framing errors */ | |
c6d61269 | 1445 | if (port_status & DIGI_BREAK_ERROR) |
1da177e4 | 1446 | flag = TTY_BREAK; |
c6d61269 | 1447 | else if (port_status & DIGI_PARITY_ERROR) |
1da177e4 | 1448 | flag = TTY_PARITY; |
c6d61269 | 1449 | else if (port_status & DIGI_FRAMING_ERROR) |
1da177e4 | 1450 | flag = TTY_FRAME; |
1da177e4 | 1451 | |
85d75107 | 1452 | /* data length is len-1 (one byte of len is port_status) */ |
1da177e4 | 1453 | --len; |
c6d61269 | 1454 | if (len > 0) { |
2f693357 JS |
1455 | tty_insert_flip_string_fixed_flag(&port->port, data, |
1456 | flag, len); | |
2e124b4a | 1457 | tty_flip_buffer_push(&port->port); |
1da177e4 | 1458 | } |
1da177e4 | 1459 | } |
c6d61269 | 1460 | spin_unlock(&priv->dp_port_lock); |
1da177e4 | 1461 | |
c6d61269 | 1462 | if (opcode == DIGI_CMD_RECEIVE_DISABLE) |
f9dfbebb | 1463 | dev_dbg(&port->dev, "%s: got RECEIVE_DISABLE\n", __func__); |
c6d61269 | 1464 | else if (opcode != DIGI_CMD_RECEIVE_DATA) |
f9dfbebb | 1465 | dev_dbg(&port->dev, "%s: unknown opcode: %d\n", __func__, opcode); |
1da177e4 | 1466 | |
41ad427d | 1467 | return throttled ? 1 : 0; |
1da177e4 LT |
1468 | |
1469 | } | |
1470 | ||
1471 | ||
41ad427d AC |
1472 | /* |
1473 | * Digi Read OOB Callback | |
1474 | * | |
1475 | * Digi Read OOB Callback handles reads on the out of band port. | |
1476 | * When called we know port and port->private are not NULL and | |
1477 | * the port->serial is valid. It returns 0 if successful, and | |
1478 | * -1 if the sanity checks failed. | |
1479 | */ | |
1da177e4 | 1480 | |
c6d61269 | 1481 | static int digi_read_oob_callback(struct urb *urb) |
1da177e4 LT |
1482 | { |
1483 | ||
cdc97792 | 1484 | struct usb_serial_port *port = urb->context; |
1da177e4 | 1485 | struct usb_serial *serial = port->serial; |
4a90f09b | 1486 | struct tty_struct *tty; |
1da177e4 LT |
1487 | struct digi_port *priv = usb_get_serial_port_data(port); |
1488 | int opcode, line, status, val; | |
1489 | int i; | |
41ad427d | 1490 | unsigned int rts; |
1da177e4 | 1491 | |
1da177e4 | 1492 | /* handle each oob command */ |
41ad427d | 1493 | for (i = 0; i < urb->actual_length - 3;) { |
1da177e4 LT |
1494 | opcode = ((unsigned char *)urb->transfer_buffer)[i++]; |
1495 | line = ((unsigned char *)urb->transfer_buffer)[i++]; | |
1496 | status = ((unsigned char *)urb->transfer_buffer)[i++]; | |
1497 | val = ((unsigned char *)urb->transfer_buffer)[i++]; | |
1498 | ||
f9dfbebb | 1499 | dev_dbg(&port->dev, "digi_read_oob_callback: opcode=%d, line=%d, status=%d, val=%d\n", |
c6d61269 | 1500 | opcode, line, status, val); |
1da177e4 | 1501 | |
c6d61269 | 1502 | if (status != 0 || line >= serial->type->num_ports) |
1da177e4 LT |
1503 | continue; |
1504 | ||
1505 | port = serial->port[line]; | |
1506 | ||
41ad427d AC |
1507 | priv = usb_get_serial_port_data(port); |
1508 | if (priv == NULL) | |
1da177e4 LT |
1509 | return -1; |
1510 | ||
4a90f09b | 1511 | tty = tty_port_tty_get(&port->port); |
4287341d | 1512 | |
41ad427d | 1513 | rts = 0; |
4287341d | 1514 | if (tty) |
adc8d746 | 1515 | rts = tty->termios.c_cflag & CRTSCTS; |
4a90f09b | 1516 | |
4287341d | 1517 | if (tty && opcode == DIGI_CMD_READ_INPUT_SIGNALS) { |
c6d61269 | 1518 | spin_lock(&priv->dp_port_lock); |
1da177e4 | 1519 | /* convert from digi flags to termiox flags */ |
c6d61269 | 1520 | if (val & DIGI_READ_INPUT_SIGNALS_CTS) { |
1da177e4 LT |
1521 | priv->dp_modem_signals |= TIOCM_CTS; |
1522 | /* port must be open to use tty struct */ | |
41ad427d | 1523 | if (rts) { |
4a90f09b | 1524 | tty->hw_stopped = 0; |
c6d61269 | 1525 | digi_wakeup_write(port); |
1da177e4 LT |
1526 | } |
1527 | } else { | |
1528 | priv->dp_modem_signals &= ~TIOCM_CTS; | |
1529 | /* port must be open to use tty struct */ | |
41ad427d | 1530 | if (rts) |
4a90f09b | 1531 | tty->hw_stopped = 1; |
1da177e4 | 1532 | } |
c6d61269 | 1533 | if (val & DIGI_READ_INPUT_SIGNALS_DSR) |
1da177e4 LT |
1534 | priv->dp_modem_signals |= TIOCM_DSR; |
1535 | else | |
1536 | priv->dp_modem_signals &= ~TIOCM_DSR; | |
c6d61269 | 1537 | if (val & DIGI_READ_INPUT_SIGNALS_RI) |
1da177e4 LT |
1538 | priv->dp_modem_signals |= TIOCM_RI; |
1539 | else | |
1540 | priv->dp_modem_signals &= ~TIOCM_RI; | |
c6d61269 | 1541 | if (val & DIGI_READ_INPUT_SIGNALS_DCD) |
1da177e4 LT |
1542 | priv->dp_modem_signals |= TIOCM_CD; |
1543 | else | |
1544 | priv->dp_modem_signals &= ~TIOCM_CD; | |
1545 | ||
c6d61269 AC |
1546 | wake_up_interruptible(&priv->dp_modem_change_wait); |
1547 | spin_unlock(&priv->dp_port_lock); | |
1548 | } else if (opcode == DIGI_CMD_TRANSMIT_IDLE) { | |
1549 | spin_lock(&priv->dp_port_lock); | |
1da177e4 | 1550 | priv->dp_transmit_idle = 1; |
c6d61269 AC |
1551 | wake_up_interruptible(&priv->dp_transmit_idle_wait); |
1552 | spin_unlock(&priv->dp_port_lock); | |
1553 | } else if (opcode == DIGI_CMD_IFLUSH_FIFO) { | |
1554 | wake_up_interruptible(&priv->dp_flush_wait); | |
1da177e4 | 1555 | } |
4a90f09b | 1556 | tty_kref_put(tty); |
1da177e4 | 1557 | } |
c6d61269 | 1558 | return 0; |
1da177e4 LT |
1559 | |
1560 | } | |
1561 | ||
68e24113 | 1562 | module_usb_serial_driver(serial_drivers, id_table_combined); |
1da177e4 | 1563 | |
c6d61269 AC |
1564 | MODULE_AUTHOR(DRIVER_AUTHOR); |
1565 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 | 1566 | MODULE_LICENSE("GPL"); |