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> | |
1da177e4 LT |
20 | #include <linux/slab.h> |
21 | #include <linux/tty.h> | |
22 | #include <linux/tty_driver.h> | |
23 | #include <linux/tty_flip.h> | |
24 | #include <linux/module.h> | |
25 | #include <linux/spinlock.h> | |
26 | #include <linux/workqueue.h> | |
41ad427d | 27 | #include <linux/uaccess.h> |
1da177e4 LT |
28 | #include <linux/usb.h> |
29 | #include <linux/wait.h> | |
174cd4b1 | 30 | #include <linux/sched/signal.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; | |
1da177e4 LT |
199 | int dp_transmit_idle; |
200 | wait_queue_head_t dp_transmit_idle_wait; | |
201 | int dp_throttled; | |
202 | int dp_throttle_restart; | |
203 | wait_queue_head_t dp_flush_wait; | |
1da177e4 LT |
204 | wait_queue_head_t dp_close_wait; /* wait queue for close */ |
205 | struct work_struct dp_wakeup_work; | |
c4028958 | 206 | struct usb_serial_port *dp_port; |
1da177e4 LT |
207 | }; |
208 | ||
209 | ||
210 | /* Local Function Declarations */ | |
211 | ||
c4028958 | 212 | static void digi_wakeup_write_lock(struct work_struct *work); |
c6d61269 AC |
213 | static int digi_write_oob_command(struct usb_serial_port *port, |
214 | unsigned char *buf, int count, int interruptible); | |
215 | static int digi_write_inb_command(struct usb_serial_port *port, | |
216 | unsigned char *buf, int count, unsigned long timeout); | |
217 | static int digi_set_modem_signals(struct usb_serial_port *port, | |
218 | unsigned int modem_signals, int interruptible); | |
219 | static int digi_transmit_idle(struct usb_serial_port *port, | |
220 | unsigned long timeout); | |
41ad427d AC |
221 | static void digi_rx_throttle(struct tty_struct *tty); |
222 | static void digi_rx_unthrottle(struct tty_struct *tty); | |
95da310e AC |
223 | static void digi_set_termios(struct tty_struct *tty, |
224 | struct usb_serial_port *port, struct ktermios *old_termios); | |
225 | static void digi_break_ctl(struct tty_struct *tty, int break_state); | |
60b33c13 | 226 | static int digi_tiocmget(struct tty_struct *tty); |
20b9d177 AC |
227 | static int digi_tiocmset(struct tty_struct *tty, unsigned int set, |
228 | unsigned int clear); | |
95da310e | 229 | static int digi_write(struct tty_struct *tty, struct usb_serial_port *port, |
20b9d177 | 230 | const unsigned char *buf, int count); |
c6d61269 | 231 | static void digi_write_bulk_callback(struct urb *urb); |
95da310e AC |
232 | static int digi_write_room(struct tty_struct *tty); |
233 | static int digi_chars_in_buffer(struct tty_struct *tty); | |
a509a7e4 | 234 | static int digi_open(struct tty_struct *tty, struct usb_serial_port *port); |
335f8514 | 235 | static void digi_close(struct usb_serial_port *port); |
335f8514 | 236 | static void digi_dtr_rts(struct usb_serial_port *port, int on); |
c6d61269 AC |
237 | static int digi_startup_device(struct usb_serial *serial); |
238 | static int digi_startup(struct usb_serial *serial); | |
f9c99bb8 AS |
239 | static void digi_disconnect(struct usb_serial *serial); |
240 | static void digi_release(struct usb_serial *serial); | |
fb44ff85 JH |
241 | static int digi_port_probe(struct usb_serial_port *port); |
242 | static int digi_port_remove(struct usb_serial_port *port); | |
c6d61269 AC |
243 | static void digi_read_bulk_callback(struct urb *urb); |
244 | static int digi_read_inb_callback(struct urb *urb); | |
245 | static int digi_read_oob_callback(struct urb *urb); | |
1da177e4 LT |
246 | |
247 | ||
7d40d7e8 | 248 | static const struct usb_device_id id_table_combined[] = { |
1da177e4 LT |
249 | { USB_DEVICE(DIGI_VENDOR_ID, DIGI_2_ID) }, |
250 | { USB_DEVICE(DIGI_VENDOR_ID, DIGI_4_ID) }, | |
251 | { } /* Terminating entry */ | |
252 | }; | |
253 | ||
7d40d7e8 | 254 | static const struct usb_device_id id_table_2[] = { |
1da177e4 LT |
255 | { USB_DEVICE(DIGI_VENDOR_ID, DIGI_2_ID) }, |
256 | { } /* Terminating entry */ | |
257 | }; | |
258 | ||
7d40d7e8 | 259 | static const struct usb_device_id id_table_4[] = { |
1da177e4 LT |
260 | { USB_DEVICE(DIGI_VENDOR_ID, DIGI_4_ID) }, |
261 | { } /* Terminating entry */ | |
262 | }; | |
263 | ||
41ad427d | 264 | MODULE_DEVICE_TABLE(usb, id_table_combined); |
1da177e4 | 265 | |
1da177e4 LT |
266 | /* device info needed for the Digi serial converter */ |
267 | ||
ea65370d | 268 | static struct usb_serial_driver digi_acceleport_2_device = { |
18fcac35 | 269 | .driver = { |
269bda1c GKH |
270 | .owner = THIS_MODULE, |
271 | .name = "digi_2", | |
18fcac35 | 272 | }, |
269bda1c | 273 | .description = "Digi 2 port USB adapter", |
1da177e4 | 274 | .id_table = id_table_2, |
1da177e4 LT |
275 | .num_ports = 3, |
276 | .open = digi_open, | |
277 | .close = digi_close, | |
335f8514 | 278 | .dtr_rts = digi_dtr_rts, |
1da177e4 LT |
279 | .write = digi_write, |
280 | .write_room = digi_write_room, | |
281 | .write_bulk_callback = digi_write_bulk_callback, | |
282 | .read_bulk_callback = digi_read_bulk_callback, | |
283 | .chars_in_buffer = digi_chars_in_buffer, | |
284 | .throttle = digi_rx_throttle, | |
285 | .unthrottle = digi_rx_unthrottle, | |
1da177e4 LT |
286 | .set_termios = digi_set_termios, |
287 | .break_ctl = digi_break_ctl, | |
288 | .tiocmget = digi_tiocmget, | |
289 | .tiocmset = digi_tiocmset, | |
290 | .attach = digi_startup, | |
f9c99bb8 AS |
291 | .disconnect = digi_disconnect, |
292 | .release = digi_release, | |
fb44ff85 JH |
293 | .port_probe = digi_port_probe, |
294 | .port_remove = digi_port_remove, | |
1da177e4 LT |
295 | }; |
296 | ||
ea65370d | 297 | static struct usb_serial_driver digi_acceleport_4_device = { |
18fcac35 | 298 | .driver = { |
269bda1c GKH |
299 | .owner = THIS_MODULE, |
300 | .name = "digi_4", | |
18fcac35 | 301 | }, |
269bda1c | 302 | .description = "Digi 4 port USB adapter", |
1da177e4 | 303 | .id_table = id_table_4, |
1da177e4 LT |
304 | .num_ports = 4, |
305 | .open = digi_open, | |
306 | .close = digi_close, | |
307 | .write = digi_write, | |
308 | .write_room = digi_write_room, | |
309 | .write_bulk_callback = digi_write_bulk_callback, | |
310 | .read_bulk_callback = digi_read_bulk_callback, | |
311 | .chars_in_buffer = digi_chars_in_buffer, | |
312 | .throttle = digi_rx_throttle, | |
313 | .unthrottle = digi_rx_unthrottle, | |
1da177e4 LT |
314 | .set_termios = digi_set_termios, |
315 | .break_ctl = digi_break_ctl, | |
316 | .tiocmget = digi_tiocmget, | |
317 | .tiocmset = digi_tiocmset, | |
318 | .attach = digi_startup, | |
f9c99bb8 AS |
319 | .disconnect = digi_disconnect, |
320 | .release = digi_release, | |
fb44ff85 JH |
321 | .port_probe = digi_port_probe, |
322 | .port_remove = digi_port_remove, | |
1da177e4 LT |
323 | }; |
324 | ||
97b6b6d2 AS |
325 | static struct usb_serial_driver * const serial_drivers[] = { |
326 | &digi_acceleport_2_device, &digi_acceleport_4_device, NULL | |
327 | }; | |
1da177e4 LT |
328 | |
329 | /* Functions */ | |
330 | ||
331 | /* | |
41ad427d AC |
332 | * Cond Wait Interruptible Timeout Irqrestore |
333 | * | |
334 | * Do spin_unlock_irqrestore and interruptible_sleep_on_timeout | |
335 | * so that wake ups are not lost if they occur between the unlock | |
336 | * and the sleep. In other words, spin_unlock_irqrestore and | |
337 | * interruptible_sleep_on_timeout are "atomic" with respect to | |
338 | * wake ups. This is used to implement condition variables. | |
339 | * | |
340 | * interruptible_sleep_on_timeout is deprecated and has been replaced | |
341 | * with the equivalent code. | |
342 | */ | |
1da177e4 | 343 | |
c6d61269 | 344 | static long cond_wait_interruptible_timeout_irqrestore( |
1da177e4 | 345 | wait_queue_head_t *q, long timeout, |
c6d61269 | 346 | spinlock_t *lock, unsigned long flags) |
5a33956a | 347 | __releases(lock) |
1da177e4 LT |
348 | { |
349 | DEFINE_WAIT(wait); | |
350 | ||
45f23f18 | 351 | prepare_to_wait(q, &wait, TASK_INTERRUPTIBLE); |
1da177e4 LT |
352 | spin_unlock_irqrestore(lock, flags); |
353 | timeout = schedule_timeout(timeout); | |
354 | finish_wait(q, &wait); | |
355 | ||
356 | return timeout; | |
1da177e4 LT |
357 | } |
358 | ||
359 | ||
360 | /* | |
41ad427d AC |
361 | * Digi Wakeup Write |
362 | * | |
363 | * Wake up port, line discipline, and tty processes sleeping | |
364 | * on writes. | |
365 | */ | |
1da177e4 | 366 | |
c4028958 | 367 | static void digi_wakeup_write_lock(struct work_struct *work) |
1da177e4 | 368 | { |
41ad427d AC |
369 | struct digi_port *priv = |
370 | container_of(work, struct digi_port, dp_wakeup_work); | |
c4028958 | 371 | struct usb_serial_port *port = priv->dp_port; |
1da177e4 | 372 | unsigned long flags; |
1da177e4 | 373 | |
c6d61269 | 374 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
6aad04f2 | 375 | tty_port_tty_wakeup(&port->port); |
c6d61269 | 376 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
1da177e4 LT |
377 | } |
378 | ||
1da177e4 | 379 | /* |
41ad427d AC |
380 | * Digi Write OOB Command |
381 | * | |
382 | * Write commands on the out of band port. Commands are 4 | |
383 | * bytes each, multiple commands can be sent at once, and | |
384 | * no command will be split across USB packets. Returns 0 | |
385 | * if successful, -EINTR if interrupted while sleeping and | |
386 | * the interruptible flag is true, or a negative error | |
387 | * returned by usb_submit_urb. | |
388 | */ | |
1da177e4 | 389 | |
c6d61269 AC |
390 | static int digi_write_oob_command(struct usb_serial_port *port, |
391 | unsigned char *buf, int count, int interruptible) | |
1da177e4 | 392 | { |
1da177e4 LT |
393 | int ret = 0; |
394 | int len; | |
395 | struct usb_serial_port *oob_port = (struct usb_serial_port *)((struct digi_serial *)(usb_get_serial_data(port->serial)))->ds_oob_port; | |
396 | struct digi_port *oob_priv = usb_get_serial_port_data(oob_port); | |
397 | unsigned long flags = 0; | |
398 | ||
f9dfbebb GKH |
399 | dev_dbg(&port->dev, |
400 | "digi_write_oob_command: TOP: port=%d, count=%d\n", | |
401 | oob_priv->dp_port_num, count); | |
1da177e4 | 402 | |
c6d61269 | 403 | spin_lock_irqsave(&oob_priv->dp_port_lock, flags); |
41ad427d | 404 | while (count > 0) { |
50de36f7 | 405 | while (oob_priv->dp_write_urb_in_use) { |
1da177e4 LT |
406 | cond_wait_interruptible_timeout_irqrestore( |
407 | &oob_port->write_wait, DIGI_RETRY_TIMEOUT, | |
c6d61269 AC |
408 | &oob_priv->dp_port_lock, flags); |
409 | if (interruptible && signal_pending(current)) | |
410 | return -EINTR; | |
411 | spin_lock_irqsave(&oob_priv->dp_port_lock, flags); | |
1da177e4 LT |
412 | } |
413 | ||
414 | /* len must be a multiple of 4, so commands are not split */ | |
c6d61269 AC |
415 | len = min(count, oob_port->bulk_out_size); |
416 | if (len > 4) | |
1da177e4 | 417 | len &= ~3; |
c6d61269 | 418 | memcpy(oob_port->write_urb->transfer_buffer, buf, len); |
1da177e4 | 419 | oob_port->write_urb->transfer_buffer_length = len; |
41ad427d AC |
420 | ret = usb_submit_urb(oob_port->write_urb, GFP_ATOMIC); |
421 | if (ret == 0) { | |
1da177e4 LT |
422 | oob_priv->dp_write_urb_in_use = 1; |
423 | count -= len; | |
424 | buf += len; | |
425 | } | |
1da177e4 | 426 | } |
c6d61269 AC |
427 | spin_unlock_irqrestore(&oob_priv->dp_port_lock, flags); |
428 | if (ret) | |
194343d9 GKH |
429 | dev_err(&port->dev, "%s: usb_submit_urb failed, ret=%d\n", |
430 | __func__, ret); | |
c6d61269 | 431 | return ret; |
1da177e4 LT |
432 | |
433 | } | |
434 | ||
435 | ||
436 | /* | |
41ad427d AC |
437 | * Digi Write In Band Command |
438 | * | |
439 | * Write commands on the given port. Commands are 4 | |
440 | * bytes each, multiple commands can be sent at once, and | |
441 | * no command will be split across USB packets. If timeout | |
442 | * is non-zero, write in band command will return after | |
443 | * waiting unsuccessfully for the URB status to clear for | |
444 | * timeout ticks. Returns 0 if successful, or a negative | |
445 | * error returned by digi_write. | |
446 | */ | |
1da177e4 | 447 | |
c6d61269 AC |
448 | static int digi_write_inb_command(struct usb_serial_port *port, |
449 | unsigned char *buf, int count, unsigned long timeout) | |
1da177e4 | 450 | { |
1da177e4 LT |
451 | int ret = 0; |
452 | int len; | |
453 | struct digi_port *priv = usb_get_serial_port_data(port); | |
454 | unsigned char *data = port->write_urb->transfer_buffer; | |
455 | unsigned long flags = 0; | |
456 | ||
f9dfbebb | 457 | dev_dbg(&port->dev, "digi_write_inb_command: TOP: port=%d, count=%d\n", |
c6d61269 | 458 | priv->dp_port_num, count); |
1da177e4 | 459 | |
c6d61269 | 460 | if (timeout) |
1da177e4 LT |
461 | timeout += jiffies; |
462 | else | |
463 | timeout = ULONG_MAX; | |
464 | ||
c6d61269 | 465 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
41ad427d | 466 | while (count > 0 && ret == 0) { |
50de36f7 GKH |
467 | while (priv->dp_write_urb_in_use && |
468 | time_before(jiffies, timeout)) { | |
1da177e4 LT |
469 | cond_wait_interruptible_timeout_irqrestore( |
470 | &port->write_wait, DIGI_RETRY_TIMEOUT, | |
c6d61269 AC |
471 | &priv->dp_port_lock, flags); |
472 | if (signal_pending(current)) | |
473 | return -EINTR; | |
474 | spin_lock_irqsave(&priv->dp_port_lock, flags); | |
1da177e4 LT |
475 | } |
476 | ||
477 | /* len must be a multiple of 4 and small enough to */ | |
478 | /* guarantee the write will send buffered data first, */ | |
479 | /* so commands are in order with data and not split */ | |
c6d61269 AC |
480 | len = min(count, port->bulk_out_size-2-priv->dp_out_buf_len); |
481 | if (len > 4) | |
1da177e4 LT |
482 | len &= ~3; |
483 | ||
484 | /* write any buffered data first */ | |
c6d61269 | 485 | if (priv->dp_out_buf_len > 0) { |
1da177e4 LT |
486 | data[0] = DIGI_CMD_SEND_DATA; |
487 | data[1] = priv->dp_out_buf_len; | |
c6d61269 AC |
488 | memcpy(data + 2, priv->dp_out_buf, |
489 | priv->dp_out_buf_len); | |
490 | memcpy(data + 2 + priv->dp_out_buf_len, buf, len); | |
1da177e4 | 491 | port->write_urb->transfer_buffer_length |
c6d61269 | 492 | = priv->dp_out_buf_len + 2 + len; |
1da177e4 | 493 | } else { |
c6d61269 | 494 | memcpy(data, buf, len); |
1da177e4 LT |
495 | port->write_urb->transfer_buffer_length = len; |
496 | } | |
1da177e4 | 497 | |
41ad427d AC |
498 | ret = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
499 | if (ret == 0) { | |
1da177e4 LT |
500 | priv->dp_write_urb_in_use = 1; |
501 | priv->dp_out_buf_len = 0; | |
502 | count -= len; | |
503 | buf += len; | |
504 | } | |
505 | ||
506 | } | |
c6d61269 | 507 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
1da177e4 | 508 | |
c6d61269 | 509 | if (ret) |
194343d9 GKH |
510 | dev_err(&port->dev, |
511 | "%s: usb_submit_urb failed, ret=%d, port=%d\n", | |
441b62c1 | 512 | __func__, ret, priv->dp_port_num); |
c6d61269 | 513 | return ret; |
1da177e4 LT |
514 | } |
515 | ||
516 | ||
517 | /* | |
41ad427d AC |
518 | * Digi Set Modem Signals |
519 | * | |
520 | * Sets or clears DTR and RTS on the port, according to the | |
521 | * modem_signals argument. Use TIOCM_DTR and TIOCM_RTS flags | |
522 | * for the modem_signals argument. Returns 0 if successful, | |
523 | * -EINTR if interrupted while sleeping, or a non-zero error | |
524 | * returned by usb_submit_urb. | |
525 | */ | |
1da177e4 | 526 | |
c6d61269 AC |
527 | static int digi_set_modem_signals(struct usb_serial_port *port, |
528 | unsigned int modem_signals, int interruptible) | |
1da177e4 LT |
529 | { |
530 | ||
531 | int ret; | |
532 | struct digi_port *port_priv = usb_get_serial_port_data(port); | |
41ad427d | 533 | struct usb_serial_port *oob_port = (struct usb_serial_port *) ((struct digi_serial *)(usb_get_serial_data(port->serial)))->ds_oob_port; |
1da177e4 LT |
534 | struct digi_port *oob_priv = usb_get_serial_port_data(oob_port); |
535 | unsigned char *data = oob_port->write_urb->transfer_buffer; | |
536 | unsigned long flags = 0; | |
537 | ||
538 | ||
f9dfbebb GKH |
539 | dev_dbg(&port->dev, |
540 | "digi_set_modem_signals: TOP: port=%d, modem_signals=0x%x\n", | |
c6d61269 | 541 | port_priv->dp_port_num, modem_signals); |
1da177e4 | 542 | |
c6d61269 AC |
543 | spin_lock_irqsave(&oob_priv->dp_port_lock, flags); |
544 | spin_lock(&port_priv->dp_port_lock); | |
1da177e4 | 545 | |
50de36f7 | 546 | while (oob_priv->dp_write_urb_in_use) { |
c6d61269 | 547 | spin_unlock(&port_priv->dp_port_lock); |
1da177e4 LT |
548 | cond_wait_interruptible_timeout_irqrestore( |
549 | &oob_port->write_wait, DIGI_RETRY_TIMEOUT, | |
c6d61269 AC |
550 | &oob_priv->dp_port_lock, flags); |
551 | if (interruptible && signal_pending(current)) | |
552 | return -EINTR; | |
553 | spin_lock_irqsave(&oob_priv->dp_port_lock, flags); | |
554 | spin_lock(&port_priv->dp_port_lock); | |
1da177e4 | 555 | } |
1da177e4 LT |
556 | data[0] = DIGI_CMD_SET_DTR_SIGNAL; |
557 | data[1] = port_priv->dp_port_num; | |
41ad427d AC |
558 | data[2] = (modem_signals & TIOCM_DTR) ? |
559 | DIGI_DTR_ACTIVE : DIGI_DTR_INACTIVE; | |
1da177e4 | 560 | data[3] = 0; |
1da177e4 LT |
561 | data[4] = DIGI_CMD_SET_RTS_SIGNAL; |
562 | data[5] = port_priv->dp_port_num; | |
41ad427d AC |
563 | data[6] = (modem_signals & TIOCM_RTS) ? |
564 | DIGI_RTS_ACTIVE : DIGI_RTS_INACTIVE; | |
1da177e4 LT |
565 | data[7] = 0; |
566 | ||
567 | oob_port->write_urb->transfer_buffer_length = 8; | |
1da177e4 | 568 | |
41ad427d AC |
569 | ret = usb_submit_urb(oob_port->write_urb, GFP_ATOMIC); |
570 | if (ret == 0) { | |
1da177e4 LT |
571 | oob_priv->dp_write_urb_in_use = 1; |
572 | port_priv->dp_modem_signals = | |
573 | (port_priv->dp_modem_signals&~(TIOCM_DTR|TIOCM_RTS)) | |
574 | | (modem_signals&(TIOCM_DTR|TIOCM_RTS)); | |
575 | } | |
c6d61269 AC |
576 | spin_unlock(&port_priv->dp_port_lock); |
577 | spin_unlock_irqrestore(&oob_priv->dp_port_lock, flags); | |
578 | if (ret) | |
194343d9 GKH |
579 | dev_err(&port->dev, "%s: usb_submit_urb failed, ret=%d\n", |
580 | __func__, ret); | |
c6d61269 | 581 | return ret; |
1da177e4 LT |
582 | } |
583 | ||
1da177e4 | 584 | /* |
41ad427d AC |
585 | * Digi Transmit Idle |
586 | * | |
587 | * Digi transmit idle waits, up to timeout ticks, for the transmitter | |
588 | * to go idle. It returns 0 if successful or a negative error. | |
589 | * | |
590 | * There are race conditions here if more than one process is calling | |
591 | * digi_transmit_idle on the same port at the same time. However, this | |
592 | * is only called from close, and only one process can be in close on a | |
593 | * port at a time, so its ok. | |
594 | */ | |
1da177e4 | 595 | |
c6d61269 AC |
596 | static int digi_transmit_idle(struct usb_serial_port *port, |
597 | unsigned long timeout) | |
1da177e4 | 598 | { |
1da177e4 LT |
599 | int ret; |
600 | unsigned char buf[2]; | |
601 | struct digi_port *priv = usb_get_serial_port_data(port); | |
602 | unsigned long flags = 0; | |
603 | ||
c6d61269 | 604 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 | 605 | priv->dp_transmit_idle = 0; |
c6d61269 | 606 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
1da177e4 LT |
607 | |
608 | buf[0] = DIGI_CMD_TRANSMIT_IDLE; | |
609 | buf[1] = 0; | |
610 | ||
611 | timeout += jiffies; | |
612 | ||
41ad427d AC |
613 | ret = digi_write_inb_command(port, buf, 2, timeout - jiffies); |
614 | if (ret != 0) | |
c6d61269 | 615 | return ret; |
1da177e4 | 616 | |
c6d61269 | 617 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 | 618 | |
41ad427d | 619 | while (time_before(jiffies, timeout) && !priv->dp_transmit_idle) { |
1da177e4 LT |
620 | cond_wait_interruptible_timeout_irqrestore( |
621 | &priv->dp_transmit_idle_wait, DIGI_RETRY_TIMEOUT, | |
c6d61269 AC |
622 | &priv->dp_port_lock, flags); |
623 | if (signal_pending(current)) | |
624 | return -EINTR; | |
625 | spin_lock_irqsave(&priv->dp_port_lock, flags); | |
1da177e4 | 626 | } |
1da177e4 | 627 | priv->dp_transmit_idle = 0; |
c6d61269 AC |
628 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
629 | return 0; | |
1da177e4 LT |
630 | |
631 | } | |
632 | ||
633 | ||
95da310e | 634 | static void digi_rx_throttle(struct tty_struct *tty) |
1da177e4 | 635 | { |
1da177e4 | 636 | unsigned long flags; |
95da310e | 637 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
638 | struct digi_port *priv = usb_get_serial_port_data(port); |
639 | ||
1da177e4 | 640 | /* stop receiving characters by not resubmitting the read urb */ |
c6d61269 | 641 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 LT |
642 | priv->dp_throttled = 1; |
643 | priv->dp_throttle_restart = 0; | |
c6d61269 | 644 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
1da177e4 LT |
645 | } |
646 | ||
647 | ||
95da310e | 648 | static void digi_rx_unthrottle(struct tty_struct *tty) |
1da177e4 | 649 | { |
1da177e4 | 650 | int ret = 0; |
1da177e4 | 651 | unsigned long flags; |
95da310e | 652 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 653 | struct digi_port *priv = usb_get_serial_port_data(port); |
1da177e4 | 654 | |
c6d61269 | 655 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 | 656 | |
1da177e4 | 657 | /* restart read chain */ |
5833041f | 658 | if (priv->dp_throttle_restart) |
c6d61269 | 659 | ret = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
1da177e4 | 660 | |
ba6b702f JH |
661 | /* turn throttle off */ |
662 | priv->dp_throttled = 0; | |
663 | priv->dp_throttle_restart = 0; | |
664 | ||
c6d61269 | 665 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
1da177e4 | 666 | |
c6d61269 | 667 | if (ret) |
194343d9 GKH |
668 | dev_err(&port->dev, |
669 | "%s: usb_submit_urb failed, ret=%d, port=%d\n", | |
441b62c1 | 670 | __func__, ret, priv->dp_port_num); |
1da177e4 LT |
671 | } |
672 | ||
673 | ||
41ad427d | 674 | static void digi_set_termios(struct tty_struct *tty, |
95da310e | 675 | struct usb_serial_port *port, struct ktermios *old_termios) |
1da177e4 | 676 | { |
1da177e4 | 677 | struct digi_port *priv = usb_get_serial_port_data(port); |
f9dfbebb | 678 | struct device *dev = &port->dev; |
adc8d746 AC |
679 | unsigned int iflag = tty->termios.c_iflag; |
680 | unsigned int cflag = tty->termios.c_cflag; | |
1da177e4 LT |
681 | unsigned int old_iflag = old_termios->c_iflag; |
682 | unsigned int old_cflag = old_termios->c_cflag; | |
683 | unsigned char buf[32]; | |
684 | unsigned int modem_signals; | |
41ad427d | 685 | int arg, ret; |
1da177e4 | 686 | int i = 0; |
c6d61269 | 687 | speed_t baud; |
1da177e4 | 688 | |
f9dfbebb GKH |
689 | dev_dbg(dev, |
690 | "digi_set_termios: TOP: port=%d, iflag=0x%x, old_iflag=0x%x, cflag=0x%x, old_cflag=0x%x\n", | |
691 | priv->dp_port_num, iflag, old_iflag, cflag, old_cflag); | |
1da177e4 LT |
692 | |
693 | /* set baud rate */ | |
41ad427d AC |
694 | baud = tty_get_baud_rate(tty); |
695 | if (baud != tty_termios_baud_rate(old_termios)) { | |
1da177e4 LT |
696 | arg = -1; |
697 | ||
698 | /* reassert DTR and (maybe) RTS on transition from B0 */ | |
9db276f8 | 699 | if ((old_cflag & CBAUD) == B0) { |
1da177e4 LT |
700 | /* don't set RTS if using hardware flow control */ |
701 | /* and throttling input */ | |
702 | modem_signals = TIOCM_DTR; | |
97ef38b8 | 703 | if (!C_CRTSCTS(tty) || !tty_throttled(tty)) |
1da177e4 | 704 | modem_signals |= TIOCM_RTS; |
c6d61269 | 705 | digi_set_modem_signals(port, modem_signals, 1); |
1da177e4 | 706 | } |
c6d61269 | 707 | switch (baud) { |
41ad427d AC |
708 | /* drop DTR and RTS on transition to B0 */ |
709 | case 0: digi_set_modem_signals(port, 0, 1); break; | |
710 | case 50: arg = DIGI_BAUD_50; break; | |
711 | case 75: arg = DIGI_BAUD_75; break; | |
712 | case 110: arg = DIGI_BAUD_110; break; | |
713 | case 150: arg = DIGI_BAUD_150; break; | |
714 | case 200: arg = DIGI_BAUD_200; break; | |
715 | case 300: arg = DIGI_BAUD_300; break; | |
716 | case 600: arg = DIGI_BAUD_600; break; | |
717 | case 1200: arg = DIGI_BAUD_1200; break; | |
718 | case 1800: arg = DIGI_BAUD_1800; break; | |
719 | case 2400: arg = DIGI_BAUD_2400; break; | |
720 | case 4800: arg = DIGI_BAUD_4800; break; | |
721 | case 9600: arg = DIGI_BAUD_9600; break; | |
722 | case 19200: arg = DIGI_BAUD_19200; break; | |
723 | case 38400: arg = DIGI_BAUD_38400; break; | |
724 | case 57600: arg = DIGI_BAUD_57600; break; | |
725 | case 115200: arg = DIGI_BAUD_115200; break; | |
726 | case 230400: arg = DIGI_BAUD_230400; break; | |
727 | case 460800: arg = DIGI_BAUD_460800; break; | |
728 | default: | |
729 | arg = DIGI_BAUD_9600; | |
730 | baud = 9600; | |
731 | break; | |
1da177e4 | 732 | } |
c6d61269 | 733 | if (arg != -1) { |
1da177e4 LT |
734 | buf[i++] = DIGI_CMD_SET_BAUD_RATE; |
735 | buf[i++] = priv->dp_port_num; | |
736 | buf[i++] = arg; | |
737 | buf[i++] = 0; | |
738 | } | |
1da177e4 | 739 | } |
1da177e4 | 740 | /* set parity */ |
adc8d746 | 741 | tty->termios.c_cflag &= ~CMSPAR; |
7fa36a99 | 742 | |
c6d61269 AC |
743 | if ((cflag&(PARENB|PARODD)) != (old_cflag&(PARENB|PARODD))) { |
744 | if (cflag&PARENB) { | |
745 | if (cflag&PARODD) | |
1da177e4 LT |
746 | arg = DIGI_PARITY_ODD; |
747 | else | |
748 | arg = DIGI_PARITY_EVEN; | |
749 | } else { | |
750 | arg = DIGI_PARITY_NONE; | |
751 | } | |
1da177e4 LT |
752 | buf[i++] = DIGI_CMD_SET_PARITY; |
753 | buf[i++] = priv->dp_port_num; | |
754 | buf[i++] = arg; | |
755 | buf[i++] = 0; | |
1da177e4 | 756 | } |
1da177e4 | 757 | /* set word size */ |
c6d61269 | 758 | if ((cflag&CSIZE) != (old_cflag&CSIZE)) { |
1da177e4 | 759 | arg = -1; |
c6d61269 | 760 | switch (cflag&CSIZE) { |
1da177e4 LT |
761 | case CS5: arg = DIGI_WORD_SIZE_5; break; |
762 | case CS6: arg = DIGI_WORD_SIZE_6; break; | |
763 | case CS7: arg = DIGI_WORD_SIZE_7; break; | |
764 | case CS8: arg = DIGI_WORD_SIZE_8; break; | |
765 | default: | |
f9dfbebb GKH |
766 | dev_dbg(dev, |
767 | "digi_set_termios: can't handle word size %d\n", | |
c6d61269 | 768 | (cflag&CSIZE)); |
1da177e4 LT |
769 | break; |
770 | } | |
771 | ||
c6d61269 | 772 | if (arg != -1) { |
1da177e4 LT |
773 | buf[i++] = DIGI_CMD_SET_WORD_SIZE; |
774 | buf[i++] = priv->dp_port_num; | |
775 | buf[i++] = arg; | |
776 | buf[i++] = 0; | |
777 | } | |
778 | ||
779 | } | |
780 | ||
781 | /* set stop bits */ | |
c6d61269 | 782 | if ((cflag&CSTOPB) != (old_cflag&CSTOPB)) { |
1da177e4 | 783 | |
c6d61269 | 784 | if ((cflag&CSTOPB)) |
1da177e4 LT |
785 | arg = DIGI_STOP_BITS_2; |
786 | else | |
787 | arg = DIGI_STOP_BITS_1; | |
788 | ||
789 | buf[i++] = DIGI_CMD_SET_STOP_BITS; | |
790 | buf[i++] = priv->dp_port_num; | |
791 | buf[i++] = arg; | |
792 | buf[i++] = 0; | |
793 | ||
794 | } | |
795 | ||
796 | /* set input flow control */ | |
c6d61269 AC |
797 | if ((iflag&IXOFF) != (old_iflag&IXOFF) |
798 | || (cflag&CRTSCTS) != (old_cflag&CRTSCTS)) { | |
1da177e4 | 799 | arg = 0; |
c6d61269 | 800 | if (iflag&IXOFF) |
1da177e4 LT |
801 | arg |= DIGI_INPUT_FLOW_CONTROL_XON_XOFF; |
802 | else | |
803 | arg &= ~DIGI_INPUT_FLOW_CONTROL_XON_XOFF; | |
804 | ||
c6d61269 | 805 | if (cflag&CRTSCTS) { |
1da177e4 LT |
806 | arg |= DIGI_INPUT_FLOW_CONTROL_RTS; |
807 | ||
808 | /* On USB-4 it is necessary to assert RTS prior */ | |
809 | /* to selecting RTS input flow control. */ | |
810 | buf[i++] = DIGI_CMD_SET_RTS_SIGNAL; | |
811 | buf[i++] = priv->dp_port_num; | |
812 | buf[i++] = DIGI_RTS_ACTIVE; | |
813 | buf[i++] = 0; | |
814 | ||
815 | } else { | |
816 | arg &= ~DIGI_INPUT_FLOW_CONTROL_RTS; | |
817 | } | |
1da177e4 LT |
818 | buf[i++] = DIGI_CMD_SET_INPUT_FLOW_CONTROL; |
819 | buf[i++] = priv->dp_port_num; | |
820 | buf[i++] = arg; | |
821 | buf[i++] = 0; | |
1da177e4 LT |
822 | } |
823 | ||
824 | /* set output flow control */ | |
7fa36a99 AC |
825 | if ((iflag & IXON) != (old_iflag & IXON) |
826 | || (cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { | |
1da177e4 | 827 | arg = 0; |
7fa36a99 | 828 | if (iflag & IXON) |
1da177e4 LT |
829 | arg |= DIGI_OUTPUT_FLOW_CONTROL_XON_XOFF; |
830 | else | |
831 | arg &= ~DIGI_OUTPUT_FLOW_CONTROL_XON_XOFF; | |
832 | ||
7fa36a99 | 833 | if (cflag & CRTSCTS) { |
1da177e4 LT |
834 | arg |= DIGI_OUTPUT_FLOW_CONTROL_CTS; |
835 | } else { | |
836 | arg &= ~DIGI_OUTPUT_FLOW_CONTROL_CTS; | |
1da177e4 LT |
837 | } |
838 | ||
839 | buf[i++] = DIGI_CMD_SET_OUTPUT_FLOW_CONTROL; | |
840 | buf[i++] = priv->dp_port_num; | |
841 | buf[i++] = arg; | |
842 | buf[i++] = 0; | |
1da177e4 LT |
843 | } |
844 | ||
845 | /* set receive enable/disable */ | |
7fa36a99 AC |
846 | if ((cflag & CREAD) != (old_cflag & CREAD)) { |
847 | if (cflag & CREAD) | |
1da177e4 LT |
848 | arg = DIGI_ENABLE; |
849 | else | |
850 | arg = DIGI_DISABLE; | |
851 | ||
852 | buf[i++] = DIGI_CMD_RECEIVE_ENABLE; | |
853 | buf[i++] = priv->dp_port_num; | |
854 | buf[i++] = arg; | |
855 | buf[i++] = 0; | |
1da177e4 | 856 | } |
41ad427d AC |
857 | ret = digi_write_oob_command(port, buf, i, 1); |
858 | if (ret != 0) | |
f9dfbebb | 859 | dev_dbg(dev, "digi_set_termios: write oob failed, ret=%d\n", ret); |
7fa36a99 | 860 | tty_encode_baud_rate(tty, baud, baud); |
1da177e4 LT |
861 | } |
862 | ||
863 | ||
95da310e | 864 | static void digi_break_ctl(struct tty_struct *tty, int break_state) |
1da177e4 | 865 | { |
95da310e | 866 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
867 | unsigned char buf[4]; |
868 | ||
1da177e4 LT |
869 | buf[0] = DIGI_CMD_BREAK_CONTROL; |
870 | buf[1] = 2; /* length */ | |
871 | buf[2] = break_state ? 1 : 0; | |
872 | buf[3] = 0; /* pad */ | |
c6d61269 | 873 | digi_write_inb_command(port, buf, 4, 0); |
1da177e4 LT |
874 | } |
875 | ||
876 | ||
60b33c13 | 877 | static int digi_tiocmget(struct tty_struct *tty) |
1da177e4 | 878 | { |
95da310e | 879 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
880 | struct digi_port *priv = usb_get_serial_port_data(port); |
881 | unsigned int val; | |
882 | unsigned long flags; | |
883 | ||
c6d61269 | 884 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 | 885 | val = priv->dp_modem_signals; |
c6d61269 | 886 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
1da177e4 LT |
887 | return val; |
888 | } | |
889 | ||
890 | ||
20b9d177 AC |
891 | static int digi_tiocmset(struct tty_struct *tty, |
892 | unsigned int set, unsigned int clear) | |
1da177e4 | 893 | { |
95da310e | 894 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
895 | struct digi_port *priv = usb_get_serial_port_data(port); |
896 | unsigned int val; | |
897 | unsigned long flags; | |
898 | ||
c6d61269 | 899 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 | 900 | val = (priv->dp_modem_signals & ~clear) | set; |
c6d61269 AC |
901 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
902 | return digi_set_modem_signals(port, val, 1); | |
1da177e4 LT |
903 | } |
904 | ||
905 | ||
95da310e AC |
906 | static int digi_write(struct tty_struct *tty, struct usb_serial_port *port, |
907 | const unsigned char *buf, int count) | |
1da177e4 LT |
908 | { |
909 | ||
41ad427d | 910 | int ret, data_len, new_len; |
1da177e4 LT |
911 | struct digi_port *priv = usb_get_serial_port_data(port); |
912 | unsigned char *data = port->write_urb->transfer_buffer; | |
913 | unsigned long flags = 0; | |
914 | ||
f9dfbebb GKH |
915 | dev_dbg(&port->dev, |
916 | "digi_write: TOP: port=%d, count=%d, in_interrupt=%ld\n", | |
c6d61269 | 917 | priv->dp_port_num, count, in_interrupt()); |
1da177e4 LT |
918 | |
919 | /* copy user data (which can sleep) before getting spin lock */ | |
c6d61269 AC |
920 | count = min(count, port->bulk_out_size-2); |
921 | count = min(64, count); | |
1da177e4 LT |
922 | |
923 | /* be sure only one write proceeds at a time */ | |
924 | /* there are races on the port private buffer */ | |
c6d61269 | 925 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 LT |
926 | |
927 | /* wait for urb status clear to submit another urb */ | |
50de36f7 | 928 | if (priv->dp_write_urb_in_use) { |
1da177e4 | 929 | /* buffer data if count is 1 (probably put_char) if possible */ |
c6d61269 | 930 | if (count == 1 && priv->dp_out_buf_len < DIGI_OUT_BUF_SIZE) { |
1da177e4 LT |
931 | priv->dp_out_buf[priv->dp_out_buf_len++] = *buf; |
932 | new_len = 1; | |
933 | } else { | |
934 | new_len = 0; | |
935 | } | |
c6d61269 AC |
936 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
937 | return new_len; | |
1da177e4 LT |
938 | } |
939 | ||
940 | /* allow space for any buffered data and for new data, up to */ | |
941 | /* transfer buffer size - 2 (for command and length bytes) */ | |
942 | new_len = min(count, port->bulk_out_size-2-priv->dp_out_buf_len); | |
943 | data_len = new_len + priv->dp_out_buf_len; | |
944 | ||
c6d61269 AC |
945 | if (data_len == 0) { |
946 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); | |
947 | return 0; | |
1da177e4 LT |
948 | } |
949 | ||
950 | port->write_urb->transfer_buffer_length = data_len+2; | |
1da177e4 LT |
951 | |
952 | *data++ = DIGI_CMD_SEND_DATA; | |
953 | *data++ = data_len; | |
954 | ||
955 | /* copy in buffered data first */ | |
c6d61269 | 956 | memcpy(data, priv->dp_out_buf, priv->dp_out_buf_len); |
1da177e4 LT |
957 | data += priv->dp_out_buf_len; |
958 | ||
959 | /* copy in new data */ | |
c6d61269 | 960 | memcpy(data, buf, new_len); |
1da177e4 | 961 | |
41ad427d AC |
962 | ret = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
963 | if (ret == 0) { | |
1da177e4 LT |
964 | priv->dp_write_urb_in_use = 1; |
965 | ret = new_len; | |
966 | priv->dp_out_buf_len = 0; | |
967 | } | |
968 | ||
969 | /* return length of new data written, or error */ | |
c6d61269 AC |
970 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
971 | if (ret < 0) | |
22a416c4 | 972 | dev_err_console(port, |
194343d9 | 973 | "%s: usb_submit_urb failed, ret=%d, port=%d\n", |
441b62c1 | 974 | __func__, ret, priv->dp_port_num); |
f9dfbebb | 975 | dev_dbg(&port->dev, "digi_write: returning %d\n", ret); |
c6d61269 | 976 | return ret; |
1da177e4 | 977 | |
41ad427d | 978 | } |
1da177e4 | 979 | |
c6d61269 | 980 | static void digi_write_bulk_callback(struct urb *urb) |
1da177e4 LT |
981 | { |
982 | ||
cdc97792 | 983 | struct usb_serial_port *port = urb->context; |
1da177e4 LT |
984 | struct usb_serial *serial; |
985 | struct digi_port *priv; | |
986 | struct digi_serial *serial_priv; | |
987 | int ret = 0; | |
85d75107 | 988 | int status = urb->status; |
1da177e4 | 989 | |
1da177e4 | 990 | /* port and serial sanity check */ |
41ad427d | 991 | if (port == NULL || (priv = usb_get_serial_port_data(port)) == NULL) { |
109f34e7 | 992 | pr_err("%s: port or port->private is NULL, status=%d\n", |
194343d9 | 993 | __func__, status); |
1da177e4 LT |
994 | return; |
995 | } | |
996 | serial = port->serial; | |
41ad427d | 997 | if (serial == NULL || (serial_priv = usb_get_serial_data(serial)) == NULL) { |
194343d9 GKH |
998 | dev_err(&port->dev, |
999 | "%s: serial or serial->private is NULL, status=%d\n", | |
1000 | __func__, status); | |
1da177e4 LT |
1001 | return; |
1002 | } | |
1003 | ||
1004 | /* handle oob callback */ | |
c6d61269 | 1005 | if (priv->dp_port_num == serial_priv->ds_oob_port_num) { |
f9dfbebb | 1006 | dev_dbg(&port->dev, "digi_write_bulk_callback: oob callback\n"); |
c6d61269 | 1007 | spin_lock(&priv->dp_port_lock); |
1da177e4 | 1008 | priv->dp_write_urb_in_use = 0; |
c6d61269 AC |
1009 | wake_up_interruptible(&port->write_wait); |
1010 | spin_unlock(&priv->dp_port_lock); | |
1da177e4 LT |
1011 | return; |
1012 | } | |
1013 | ||
1f87158e | 1014 | /* try to send any buffered data on this port */ |
c6d61269 | 1015 | spin_lock(&priv->dp_port_lock); |
1da177e4 | 1016 | priv->dp_write_urb_in_use = 0; |
1f87158e | 1017 | if (priv->dp_out_buf_len > 0) { |
1da177e4 LT |
1018 | *((unsigned char *)(port->write_urb->transfer_buffer)) |
1019 | = (unsigned char)DIGI_CMD_SEND_DATA; | |
41ad427d | 1020 | *((unsigned char *)(port->write_urb->transfer_buffer) + 1) |
1da177e4 | 1021 | = (unsigned char)priv->dp_out_buf_len; |
41ad427d AC |
1022 | port->write_urb->transfer_buffer_length = |
1023 | priv->dp_out_buf_len + 2; | |
41ad427d | 1024 | memcpy(port->write_urb->transfer_buffer + 2, priv->dp_out_buf, |
c6d61269 | 1025 | priv->dp_out_buf_len); |
41ad427d AC |
1026 | ret = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
1027 | if (ret == 0) { | |
1da177e4 LT |
1028 | priv->dp_write_urb_in_use = 1; |
1029 | priv->dp_out_buf_len = 0; | |
1030 | } | |
1da177e4 | 1031 | } |
1da177e4 | 1032 | /* wake up processes sleeping on writes immediately */ |
6aad04f2 | 1033 | tty_port_tty_wakeup(&port->port); |
1da177e4 LT |
1034 | /* also queue up a wakeup at scheduler time, in case we */ |
1035 | /* lost the race in write_chan(). */ | |
1036 | schedule_work(&priv->dp_wakeup_work); | |
1037 | ||
c6d61269 | 1038 | spin_unlock(&priv->dp_port_lock); |
1f87158e | 1039 | if (ret && ret != -EPERM) |
22a416c4 | 1040 | dev_err_console(port, |
194343d9 | 1041 | "%s: usb_submit_urb failed, ret=%d, port=%d\n", |
441b62c1 | 1042 | __func__, ret, priv->dp_port_num); |
1da177e4 LT |
1043 | } |
1044 | ||
95da310e | 1045 | static int digi_write_room(struct tty_struct *tty) |
1da177e4 | 1046 | { |
95da310e | 1047 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 1048 | struct digi_port *priv = usb_get_serial_port_data(port); |
95da310e | 1049 | int room; |
1da177e4 LT |
1050 | unsigned long flags = 0; |
1051 | ||
c6d61269 | 1052 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 | 1053 | |
50de36f7 | 1054 | if (priv->dp_write_urb_in_use) |
1da177e4 LT |
1055 | room = 0; |
1056 | else | |
1057 | room = port->bulk_out_size - 2 - priv->dp_out_buf_len; | |
1058 | ||
c6d61269 | 1059 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
f9dfbebb | 1060 | dev_dbg(&port->dev, "digi_write_room: port=%d, room=%d\n", priv->dp_port_num, room); |
c6d61269 | 1061 | return room; |
1da177e4 LT |
1062 | |
1063 | } | |
1064 | ||
95da310e | 1065 | static int digi_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 1066 | { |
95da310e | 1067 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
1068 | struct digi_port *priv = usb_get_serial_port_data(port); |
1069 | ||
50de36f7 | 1070 | if (priv->dp_write_urb_in_use) { |
f9dfbebb | 1071 | dev_dbg(&port->dev, "digi_chars_in_buffer: port=%d, chars=%d\n", |
c6d61269 AC |
1072 | priv->dp_port_num, port->bulk_out_size - 2); |
1073 | /* return(port->bulk_out_size - 2); */ | |
1074 | return 256; | |
1da177e4 | 1075 | } else { |
f9dfbebb | 1076 | dev_dbg(&port->dev, "digi_chars_in_buffer: port=%d, chars=%d\n", |
c6d61269 AC |
1077 | priv->dp_port_num, priv->dp_out_buf_len); |
1078 | return priv->dp_out_buf_len; | |
1da177e4 LT |
1079 | } |
1080 | ||
1081 | } | |
1082 | ||
335f8514 AC |
1083 | static void digi_dtr_rts(struct usb_serial_port *port, int on) |
1084 | { | |
1085 | /* Adjust DTR and RTS */ | |
1086 | digi_set_modem_signals(port, on * (TIOCM_DTR|TIOCM_RTS), 1); | |
1087 | } | |
1088 | ||
a509a7e4 | 1089 | static int digi_open(struct tty_struct *tty, struct usb_serial_port *port) |
1da177e4 | 1090 | { |
1da177e4 LT |
1091 | int ret; |
1092 | unsigned char buf[32]; | |
1093 | struct digi_port *priv = usb_get_serial_port_data(port); | |
606d099c | 1094 | struct ktermios not_termios; |
1da177e4 | 1095 | |
1da177e4 | 1096 | /* be sure the device is started up */ |
c6d61269 AC |
1097 | if (digi_startup_device(port->serial) != 0) |
1098 | return -ENXIO; | |
1da177e4 | 1099 | |
1da177e4 LT |
1100 | /* read modem signals automatically whenever they change */ |
1101 | buf[0] = DIGI_CMD_READ_INPUT_SIGNALS; | |
1102 | buf[1] = priv->dp_port_num; | |
1103 | buf[2] = DIGI_ENABLE; | |
1104 | buf[3] = 0; | |
1105 | ||
1106 | /* flush fifos */ | |
1107 | buf[4] = DIGI_CMD_IFLUSH_FIFO; | |
1108 | buf[5] = priv->dp_port_num; | |
1109 | buf[6] = DIGI_FLUSH_TX | DIGI_FLUSH_RX; | |
1110 | buf[7] = 0; | |
1111 | ||
41ad427d AC |
1112 | ret = digi_write_oob_command(port, buf, 8, 1); |
1113 | if (ret != 0) | |
f9dfbebb | 1114 | dev_dbg(&port->dev, "digi_open: write oob failed, ret=%d\n", ret); |
1da177e4 LT |
1115 | |
1116 | /* set termios settings */ | |
95da310e | 1117 | if (tty) { |
adc8d746 AC |
1118 | not_termios.c_cflag = ~tty->termios.c_cflag; |
1119 | not_termios.c_iflag = ~tty->termios.c_iflag; | |
95da310e AC |
1120 | digi_set_termios(tty, port, ¬_termios); |
1121 | } | |
c6d61269 | 1122 | return 0; |
1da177e4 LT |
1123 | } |
1124 | ||
1125 | ||
335f8514 | 1126 | static void digi_close(struct usb_serial_port *port) |
1da177e4 LT |
1127 | { |
1128 | DEFINE_WAIT(wait); | |
1129 | int ret; | |
1130 | unsigned char buf[32]; | |
1da177e4 | 1131 | struct digi_port *priv = usb_get_serial_port_data(port); |
1da177e4 | 1132 | |
0915f490 | 1133 | mutex_lock(&port->serial->disc_mutex); |
1da177e4 | 1134 | /* if disconnected, just clear flags */ |
0915f490 | 1135 | if (port->serial->disconnected) |
1da177e4 LT |
1136 | goto exit; |
1137 | ||
28e679ae JH |
1138 | /* FIXME: Transmit idle belongs in the wait_unti_sent path */ |
1139 | digi_transmit_idle(port, DIGI_CLOSE_TIMEOUT); | |
1140 | ||
1141 | /* disable input flow control */ | |
1142 | buf[0] = DIGI_CMD_SET_INPUT_FLOW_CONTROL; | |
1143 | buf[1] = priv->dp_port_num; | |
1144 | buf[2] = DIGI_DISABLE; | |
1145 | buf[3] = 0; | |
1146 | ||
1147 | /* disable output flow control */ | |
1148 | buf[4] = DIGI_CMD_SET_OUTPUT_FLOW_CONTROL; | |
1149 | buf[5] = priv->dp_port_num; | |
1150 | buf[6] = DIGI_DISABLE; | |
1151 | buf[7] = 0; | |
1152 | ||
1153 | /* disable reading modem signals automatically */ | |
1154 | buf[8] = DIGI_CMD_READ_INPUT_SIGNALS; | |
1155 | buf[9] = priv->dp_port_num; | |
1156 | buf[10] = DIGI_DISABLE; | |
1157 | buf[11] = 0; | |
1158 | ||
1159 | /* disable receive */ | |
1160 | buf[12] = DIGI_CMD_RECEIVE_ENABLE; | |
1161 | buf[13] = priv->dp_port_num; | |
1162 | buf[14] = DIGI_DISABLE; | |
1163 | buf[15] = 0; | |
1164 | ||
1165 | /* flush fifos */ | |
1166 | buf[16] = DIGI_CMD_IFLUSH_FIFO; | |
1167 | buf[17] = priv->dp_port_num; | |
1168 | buf[18] = DIGI_FLUSH_TX | DIGI_FLUSH_RX; | |
1169 | buf[19] = 0; | |
1170 | ||
1171 | ret = digi_write_oob_command(port, buf, 20, 0); | |
1172 | if (ret != 0) | |
1173 | dev_dbg(&port->dev, "digi_close: write oob failed, ret=%d\n", | |
1174 | ret); | |
1175 | /* wait for final commands on oob port to complete */ | |
1176 | prepare_to_wait(&priv->dp_flush_wait, &wait, | |
1177 | TASK_INTERRUPTIBLE); | |
1178 | schedule_timeout(DIGI_CLOSE_TIMEOUT); | |
1179 | finish_wait(&priv->dp_flush_wait, &wait); | |
1180 | ||
1181 | /* shutdown any outstanding bulk writes */ | |
1182 | usb_kill_urb(port->write_urb); | |
1da177e4 | 1183 | exit: |
0915f490 | 1184 | spin_lock_irq(&priv->dp_port_lock); |
1da177e4 | 1185 | priv->dp_write_urb_in_use = 0; |
c6d61269 | 1186 | wake_up_interruptible(&priv->dp_close_wait); |
0915f490 ON |
1187 | spin_unlock_irq(&priv->dp_port_lock); |
1188 | mutex_unlock(&port->serial->disc_mutex); | |
1da177e4 LT |
1189 | } |
1190 | ||
1191 | ||
1192 | /* | |
41ad427d AC |
1193 | * Digi Startup Device |
1194 | * | |
1195 | * Starts reads on all ports. Must be called AFTER startup, with | |
1196 | * urbs initialized. Returns 0 if successful, non-zero error otherwise. | |
1197 | */ | |
1da177e4 | 1198 | |
c6d61269 | 1199 | static int digi_startup_device(struct usb_serial *serial) |
1da177e4 | 1200 | { |
41ad427d | 1201 | int i, ret = 0; |
1da177e4 LT |
1202 | struct digi_serial *serial_priv = usb_get_serial_data(serial); |
1203 | struct usb_serial_port *port; | |
1204 | ||
1da177e4 | 1205 | /* be sure this happens exactly once */ |
c6d61269 AC |
1206 | spin_lock(&serial_priv->ds_serial_lock); |
1207 | if (serial_priv->ds_device_started) { | |
1208 | spin_unlock(&serial_priv->ds_serial_lock); | |
1209 | return 0; | |
1da177e4 LT |
1210 | } |
1211 | serial_priv->ds_device_started = 1; | |
c6d61269 | 1212 | spin_unlock(&serial_priv->ds_serial_lock); |
1da177e4 LT |
1213 | |
1214 | /* start reading from each bulk in endpoint for the device */ | |
1215 | /* set USB_DISABLE_SPD flag for write bulk urbs */ | |
c6d61269 | 1216 | for (i = 0; i < serial->type->num_ports + 1; i++) { |
1da177e4 | 1217 | port = serial->port[i]; |
41ad427d AC |
1218 | ret = usb_submit_urb(port->read_urb, GFP_KERNEL); |
1219 | if (ret != 0) { | |
194343d9 GKH |
1220 | dev_err(&port->dev, |
1221 | "%s: usb_submit_urb failed, ret=%d, port=%d\n", | |
1222 | __func__, ret, i); | |
1da177e4 LT |
1223 | break; |
1224 | } | |
1da177e4 | 1225 | } |
c6d61269 | 1226 | return ret; |
1da177e4 LT |
1227 | } |
1228 | ||
fb44ff85 | 1229 | static int digi_port_init(struct usb_serial_port *port, unsigned port_num) |
1da177e4 | 1230 | { |
1da177e4 | 1231 | struct digi_port *priv; |
1da177e4 | 1232 | |
fb44ff85 JH |
1233 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
1234 | if (!priv) | |
1235 | return -ENOMEM; | |
1da177e4 | 1236 | |
fb44ff85 JH |
1237 | spin_lock_init(&priv->dp_port_lock); |
1238 | priv->dp_port_num = port_num; | |
fb44ff85 JH |
1239 | init_waitqueue_head(&priv->dp_transmit_idle_wait); |
1240 | init_waitqueue_head(&priv->dp_flush_wait); | |
1241 | init_waitqueue_head(&priv->dp_close_wait); | |
1242 | INIT_WORK(&priv->dp_wakeup_work, digi_wakeup_write_lock); | |
1243 | priv->dp_port = port; | |
1da177e4 | 1244 | |
fb44ff85 JH |
1245 | init_waitqueue_head(&port->write_wait); |
1246 | ||
1247 | usb_set_serial_port_data(port, priv); | |
1248 | ||
1249 | return 0; | |
1250 | } | |
1251 | ||
1252 | static int digi_startup(struct usb_serial *serial) | |
1253 | { | |
5a07975a | 1254 | struct device *dev = &serial->interface->dev; |
fb44ff85 JH |
1255 | struct digi_serial *serial_priv; |
1256 | int ret; | |
5a07975a ON |
1257 | int i; |
1258 | ||
1259 | /* check whether the device has the expected number of endpoints */ | |
1260 | if (serial->num_port_pointers < serial->type->num_ports + 1) { | |
1261 | dev_err(dev, "OOB endpoints missing\n"); | |
1262 | return -ENODEV; | |
1263 | } | |
1264 | ||
1265 | for (i = 0; i < serial->type->num_ports + 1 ; i++) { | |
1266 | if (!serial->port[i]->read_urb) { | |
1267 | dev_err(dev, "bulk-in endpoint missing\n"); | |
1268 | return -ENODEV; | |
1269 | } | |
1270 | if (!serial->port[i]->write_urb) { | |
1271 | dev_err(dev, "bulk-out endpoint missing\n"); | |
1272 | return -ENODEV; | |
1273 | } | |
1274 | } | |
fb44ff85 JH |
1275 | |
1276 | serial_priv = kzalloc(sizeof(*serial_priv), GFP_KERNEL); | |
1277 | if (!serial_priv) | |
1278 | return -ENOMEM; | |
1da177e4 | 1279 | |
c6d61269 | 1280 | spin_lock_init(&serial_priv->ds_serial_lock); |
1da177e4 LT |
1281 | serial_priv->ds_oob_port_num = serial->type->num_ports; |
1282 | serial_priv->ds_oob_port = serial->port[serial_priv->ds_oob_port_num]; | |
fb44ff85 JH |
1283 | |
1284 | ret = digi_port_init(serial_priv->ds_oob_port, | |
1285 | serial_priv->ds_oob_port_num); | |
1286 | if (ret) { | |
1287 | kfree(serial_priv); | |
1288 | return ret; | |
1289 | } | |
1290 | ||
1da177e4 LT |
1291 | usb_set_serial_data(serial, serial_priv); |
1292 | ||
c6d61269 | 1293 | return 0; |
1da177e4 LT |
1294 | } |
1295 | ||
1296 | ||
f9c99bb8 | 1297 | static void digi_disconnect(struct usb_serial *serial) |
1da177e4 | 1298 | { |
1da177e4 | 1299 | int i; |
1da177e4 LT |
1300 | |
1301 | /* stop reads and writes on all ports */ | |
c6d61269 | 1302 | for (i = 0; i < serial->type->num_ports + 1; i++) { |
1da177e4 LT |
1303 | usb_kill_urb(serial->port[i]->read_urb); |
1304 | usb_kill_urb(serial->port[i]->write_urb); | |
1305 | } | |
f9c99bb8 AS |
1306 | } |
1307 | ||
1308 | ||
1309 | static void digi_release(struct usb_serial *serial) | |
1310 | { | |
fb44ff85 JH |
1311 | struct digi_serial *serial_priv; |
1312 | struct digi_port *priv; | |
1313 | ||
1314 | serial_priv = usb_get_serial_data(serial); | |
1315 | ||
1316 | priv = usb_get_serial_port_data(serial_priv->ds_oob_port); | |
1317 | kfree(priv); | |
1da177e4 | 1318 | |
fb44ff85 | 1319 | kfree(serial_priv); |
1da177e4 LT |
1320 | } |
1321 | ||
fb44ff85 JH |
1322 | static int digi_port_probe(struct usb_serial_port *port) |
1323 | { | |
1143832e | 1324 | return digi_port_init(port, port->port_number); |
fb44ff85 JH |
1325 | } |
1326 | ||
1327 | static int digi_port_remove(struct usb_serial_port *port) | |
1328 | { | |
1329 | struct digi_port *priv; | |
1330 | ||
1331 | priv = usb_get_serial_port_data(port); | |
1332 | kfree(priv); | |
1333 | ||
1334 | return 0; | |
1335 | } | |
1da177e4 | 1336 | |
c6d61269 | 1337 | static void digi_read_bulk_callback(struct urb *urb) |
1da177e4 | 1338 | { |
cdc97792 | 1339 | struct usb_serial_port *port = urb->context; |
1da177e4 LT |
1340 | struct digi_port *priv; |
1341 | struct digi_serial *serial_priv; | |
1342 | int ret; | |
85d75107 | 1343 | int status = urb->status; |
1da177e4 | 1344 | |
1da177e4 | 1345 | /* port sanity check, do not resubmit if port is not valid */ |
194343d9 GKH |
1346 | if (port == NULL) |
1347 | return; | |
1348 | priv = usb_get_serial_port_data(port); | |
1349 | if (priv == NULL) { | |
1350 | dev_err(&port->dev, "%s: port->private is NULL, status=%d\n", | |
1351 | __func__, status); | |
1da177e4 LT |
1352 | return; |
1353 | } | |
c6d61269 | 1354 | if (port->serial == NULL || |
41ad427d | 1355 | (serial_priv = usb_get_serial_data(port->serial)) == NULL) { |
194343d9 GKH |
1356 | dev_err(&port->dev, "%s: serial is bad or serial->private " |
1357 | "is NULL, status=%d\n", __func__, status); | |
1da177e4 LT |
1358 | return; |
1359 | } | |
1360 | ||
1361 | /* do not resubmit urb if it has any status error */ | |
85d75107 | 1362 | if (status) { |
194343d9 GKH |
1363 | dev_err(&port->dev, |
1364 | "%s: nonzero read bulk status: status=%d, port=%d\n", | |
1365 | __func__, status, priv->dp_port_num); | |
1da177e4 LT |
1366 | return; |
1367 | } | |
1368 | ||
1369 | /* handle oob or inb callback, do not resubmit if error */ | |
c6d61269 AC |
1370 | if (priv->dp_port_num == serial_priv->ds_oob_port_num) { |
1371 | if (digi_read_oob_callback(urb) != 0) | |
1da177e4 LT |
1372 | return; |
1373 | } else { | |
c6d61269 | 1374 | if (digi_read_inb_callback(urb) != 0) |
1da177e4 LT |
1375 | return; |
1376 | } | |
1377 | ||
1378 | /* continue read */ | |
41ad427d | 1379 | ret = usb_submit_urb(urb, GFP_ATOMIC); |
1f87158e | 1380 | if (ret != 0 && ret != -EPERM) { |
194343d9 GKH |
1381 | dev_err(&port->dev, |
1382 | "%s: failed resubmitting urb, ret=%d, port=%d\n", | |
1383 | __func__, ret, priv->dp_port_num); | |
1da177e4 LT |
1384 | } |
1385 | ||
1386 | } | |
1387 | ||
41ad427d AC |
1388 | /* |
1389 | * Digi Read INB Callback | |
1390 | * | |
1391 | * Digi Read INB Callback handles reads on the in band ports, sending | |
1392 | * the data on to the tty subsystem. When called we know port and | |
1393 | * port->private are not NULL and port->serial has been validated. | |
1394 | * It returns 0 if successful, 1 if successful but the port is | |
1395 | * throttled, and -1 if the sanity checks failed. | |
1396 | */ | |
1da177e4 | 1397 | |
c6d61269 | 1398 | static int digi_read_inb_callback(struct urb *urb) |
1da177e4 | 1399 | { |
cdc97792 | 1400 | struct usb_serial_port *port = urb->context; |
1da177e4 | 1401 | struct digi_port *priv = usb_get_serial_port_data(port); |
1b0aed2b JH |
1402 | unsigned char *buf = urb->transfer_buffer; |
1403 | int opcode; | |
1404 | int len; | |
1405 | int port_status; | |
1406 | unsigned char *data; | |
41ad427d | 1407 | int flag, throttled; |
1da177e4 LT |
1408 | |
1409 | /* short/multiple packet check */ | |
1b0aed2b JH |
1410 | if (urb->actual_length < 2) { |
1411 | dev_warn(&port->dev, "short packet received\n"); | |
1412 | return -1; | |
1413 | } | |
1414 | ||
1415 | opcode = buf[0]; | |
1416 | len = buf[1]; | |
1417 | ||
c6d61269 | 1418 | if (urb->actual_length != len + 2) { |
1b0aed2b JH |
1419 | dev_err(&port->dev, "malformed packet received: port=%d, opcode=%d, len=%d, actual_length=%u\n", |
1420 | priv->dp_port_num, opcode, len, urb->actual_length); | |
1421 | return -1; | |
1422 | } | |
1423 | ||
1424 | if (opcode == DIGI_CMD_RECEIVE_DATA && len < 1) { | |
1425 | dev_err(&port->dev, "malformed data packet received\n"); | |
c6d61269 | 1426 | return -1; |
1da177e4 LT |
1427 | } |
1428 | ||
c6d61269 | 1429 | spin_lock(&priv->dp_port_lock); |
1da177e4 LT |
1430 | |
1431 | /* check for throttle; if set, do not resubmit read urb */ | |
1432 | /* indicate the read chain needs to be restarted on unthrottle */ | |
1433 | throttled = priv->dp_throttled; | |
c6d61269 | 1434 | if (throttled) |
1da177e4 LT |
1435 | priv->dp_throttle_restart = 1; |
1436 | ||
1437 | /* receive data */ | |
2e124b4a | 1438 | if (opcode == DIGI_CMD_RECEIVE_DATA) { |
1b0aed2b JH |
1439 | port_status = buf[2]; |
1440 | data = &buf[3]; | |
1441 | ||
85d75107 | 1442 | /* get flag from port_status */ |
1da177e4 LT |
1443 | flag = 0; |
1444 | ||
1445 | /* overrun is special, not associated with a char */ | |
c6d61269 | 1446 | if (port_status & DIGI_OVERRUN_ERROR) |
92a19f9c | 1447 | tty_insert_flip_char(&port->port, 0, TTY_OVERRUN); |
1da177e4 LT |
1448 | |
1449 | /* break takes precedence over parity, */ | |
1450 | /* which takes precedence over framing errors */ | |
c6d61269 | 1451 | if (port_status & DIGI_BREAK_ERROR) |
1da177e4 | 1452 | flag = TTY_BREAK; |
c6d61269 | 1453 | else if (port_status & DIGI_PARITY_ERROR) |
1da177e4 | 1454 | flag = TTY_PARITY; |
c6d61269 | 1455 | else if (port_status & DIGI_FRAMING_ERROR) |
1da177e4 | 1456 | flag = TTY_FRAME; |
1da177e4 | 1457 | |
85d75107 | 1458 | /* data length is len-1 (one byte of len is port_status) */ |
1da177e4 | 1459 | --len; |
c6d61269 | 1460 | if (len > 0) { |
2f693357 JS |
1461 | tty_insert_flip_string_fixed_flag(&port->port, data, |
1462 | flag, len); | |
2e124b4a | 1463 | tty_flip_buffer_push(&port->port); |
1da177e4 | 1464 | } |
1da177e4 | 1465 | } |
c6d61269 | 1466 | spin_unlock(&priv->dp_port_lock); |
1da177e4 | 1467 | |
c6d61269 | 1468 | if (opcode == DIGI_CMD_RECEIVE_DISABLE) |
f9dfbebb | 1469 | dev_dbg(&port->dev, "%s: got RECEIVE_DISABLE\n", __func__); |
c6d61269 | 1470 | else if (opcode != DIGI_CMD_RECEIVE_DATA) |
f9dfbebb | 1471 | dev_dbg(&port->dev, "%s: unknown opcode: %d\n", __func__, opcode); |
1da177e4 | 1472 | |
41ad427d | 1473 | return throttled ? 1 : 0; |
1da177e4 LT |
1474 | |
1475 | } | |
1476 | ||
1477 | ||
41ad427d AC |
1478 | /* |
1479 | * Digi Read OOB Callback | |
1480 | * | |
1481 | * Digi Read OOB Callback handles reads on the out of band port. | |
1482 | * When called we know port and port->private are not NULL and | |
1483 | * the port->serial is valid. It returns 0 if successful, and | |
1484 | * -1 if the sanity checks failed. | |
1485 | */ | |
1da177e4 | 1486 | |
c6d61269 | 1487 | static int digi_read_oob_callback(struct urb *urb) |
1da177e4 LT |
1488 | { |
1489 | ||
cdc97792 | 1490 | struct usb_serial_port *port = urb->context; |
1da177e4 | 1491 | struct usb_serial *serial = port->serial; |
4a90f09b | 1492 | struct tty_struct *tty; |
1da177e4 | 1493 | struct digi_port *priv = usb_get_serial_port_data(port); |
2d380889 | 1494 | unsigned char *buf = urb->transfer_buffer; |
1da177e4 LT |
1495 | int opcode, line, status, val; |
1496 | int i; | |
41ad427d | 1497 | unsigned int rts; |
1da177e4 | 1498 | |
2d380889 JH |
1499 | if (urb->actual_length < 4) |
1500 | return -1; | |
1501 | ||
1da177e4 | 1502 | /* handle each oob command */ |
2d380889 JH |
1503 | for (i = 0; i < urb->actual_length - 4; i += 4) { |
1504 | opcode = buf[i]; | |
1505 | line = buf[i + 1]; | |
1506 | status = buf[i + 2]; | |
1507 | val = buf[i + 3]; | |
1da177e4 | 1508 | |
f9dfbebb | 1509 | dev_dbg(&port->dev, "digi_read_oob_callback: opcode=%d, line=%d, status=%d, val=%d\n", |
c6d61269 | 1510 | opcode, line, status, val); |
1da177e4 | 1511 | |
c6d61269 | 1512 | if (status != 0 || line >= serial->type->num_ports) |
1da177e4 LT |
1513 | continue; |
1514 | ||
1515 | port = serial->port[line]; | |
1516 | ||
41ad427d AC |
1517 | priv = usb_get_serial_port_data(port); |
1518 | if (priv == NULL) | |
1da177e4 LT |
1519 | return -1; |
1520 | ||
4a90f09b | 1521 | tty = tty_port_tty_get(&port->port); |
4287341d | 1522 | |
41ad427d | 1523 | rts = 0; |
4287341d | 1524 | if (tty) |
9db276f8 PH |
1525 | rts = C_CRTSCTS(tty); |
1526 | ||
4287341d | 1527 | if (tty && opcode == DIGI_CMD_READ_INPUT_SIGNALS) { |
c6d61269 | 1528 | spin_lock(&priv->dp_port_lock); |
1da177e4 | 1529 | /* convert from digi flags to termiox flags */ |
c6d61269 | 1530 | if (val & DIGI_READ_INPUT_SIGNALS_CTS) { |
1da177e4 LT |
1531 | priv->dp_modem_signals |= TIOCM_CTS; |
1532 | /* port must be open to use tty struct */ | |
d95e3cae | 1533 | if (rts) |
6aad04f2 | 1534 | tty_port_tty_wakeup(&port->port); |
1da177e4 LT |
1535 | } else { |
1536 | priv->dp_modem_signals &= ~TIOCM_CTS; | |
1537 | /* port must be open to use tty struct */ | |
1da177e4 | 1538 | } |
c6d61269 | 1539 | if (val & DIGI_READ_INPUT_SIGNALS_DSR) |
1da177e4 LT |
1540 | priv->dp_modem_signals |= TIOCM_DSR; |
1541 | else | |
1542 | priv->dp_modem_signals &= ~TIOCM_DSR; | |
c6d61269 | 1543 | if (val & DIGI_READ_INPUT_SIGNALS_RI) |
1da177e4 LT |
1544 | priv->dp_modem_signals |= TIOCM_RI; |
1545 | else | |
1546 | priv->dp_modem_signals &= ~TIOCM_RI; | |
c6d61269 | 1547 | if (val & DIGI_READ_INPUT_SIGNALS_DCD) |
1da177e4 LT |
1548 | priv->dp_modem_signals |= TIOCM_CD; |
1549 | else | |
1550 | priv->dp_modem_signals &= ~TIOCM_CD; | |
1551 | ||
c6d61269 AC |
1552 | spin_unlock(&priv->dp_port_lock); |
1553 | } else if (opcode == DIGI_CMD_TRANSMIT_IDLE) { | |
1554 | spin_lock(&priv->dp_port_lock); | |
1da177e4 | 1555 | priv->dp_transmit_idle = 1; |
c6d61269 AC |
1556 | wake_up_interruptible(&priv->dp_transmit_idle_wait); |
1557 | spin_unlock(&priv->dp_port_lock); | |
1558 | } else if (opcode == DIGI_CMD_IFLUSH_FIFO) { | |
1559 | wake_up_interruptible(&priv->dp_flush_wait); | |
1da177e4 | 1560 | } |
4a90f09b | 1561 | tty_kref_put(tty); |
1da177e4 | 1562 | } |
c6d61269 | 1563 | return 0; |
1da177e4 LT |
1564 | |
1565 | } | |
1566 | ||
68e24113 | 1567 | module_usb_serial_driver(serial_drivers, id_table_combined); |
1da177e4 | 1568 | |
c6d61269 AC |
1569 | MODULE_AUTHOR(DRIVER_AUTHOR); |
1570 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 | 1571 | MODULE_LICENSE("GPL"); |