]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Digi AccelePort USB-4 and USB-2 Serial Converters | |
3 | * | |
4 | * Copyright 2000 by Digi International | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * Shamelessly based on Brian Warner's keyspan_pda.c and Greg Kroah-Hartman's | |
12 | * usb-serial driver. | |
13 | * | |
14 | * Peter Berger (pberger@brimson.com) | |
15 | * Al Borchers (borchers@steinerpoint.com) | |
1da177e4 LT |
16 | */ |
17 | ||
1da177e4 LT |
18 | #include <linux/kernel.h> |
19 | #include <linux/errno.h> | |
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> | |
a969888c | 30 | #include <linux/usb/serial.h> |
1da177e4 LT |
31 | |
32 | /* Defines */ | |
33 | ||
1da177e4 LT |
34 | #define DRIVER_AUTHOR "Peter Berger <pberger@brimson.com>, Al Borchers <borchers@steinerpoint.com>" |
35 | #define DRIVER_DESC "Digi AccelePort USB-2/USB-4 Serial Converter driver" | |
36 | ||
37 | /* port output buffer length -- must be <= transfer buffer length - 2 */ | |
38 | /* so we can be sure to send the full buffer in one urb */ | |
39 | #define DIGI_OUT_BUF_SIZE 8 | |
40 | ||
41 | /* port input buffer length -- must be >= transfer buffer length - 3 */ | |
42 | /* so we can be sure to hold at least one full buffer from one urb */ | |
43 | #define DIGI_IN_BUF_SIZE 64 | |
44 | ||
45 | /* retry timeout while sleeping */ | |
46 | #define DIGI_RETRY_TIMEOUT (HZ/10) | |
47 | ||
48 | /* timeout while waiting for tty output to drain in close */ | |
49 | /* this delay is used twice in close, so the total delay could */ | |
50 | /* be twice this value */ | |
51 | #define DIGI_CLOSE_TIMEOUT (5*HZ) | |
52 | ||
53 | ||
54 | /* AccelePort USB Defines */ | |
55 | ||
56 | /* ids */ | |
57 | #define DIGI_VENDOR_ID 0x05c5 | |
58 | #define DIGI_2_ID 0x0002 /* USB-2 */ | |
59 | #define DIGI_4_ID 0x0004 /* USB-4 */ | |
60 | ||
61 | /* commands | |
62 | * "INB": can be used on the in-band endpoint | |
63 | * "OOB": can be used on the out-of-band endpoint | |
64 | */ | |
65 | #define DIGI_CMD_SET_BAUD_RATE 0 /* INB, OOB */ | |
66 | #define DIGI_CMD_SET_WORD_SIZE 1 /* INB, OOB */ | |
67 | #define DIGI_CMD_SET_PARITY 2 /* INB, OOB */ | |
68 | #define DIGI_CMD_SET_STOP_BITS 3 /* INB, OOB */ | |
69 | #define DIGI_CMD_SET_INPUT_FLOW_CONTROL 4 /* INB, OOB */ | |
70 | #define DIGI_CMD_SET_OUTPUT_FLOW_CONTROL 5 /* INB, OOB */ | |
71 | #define DIGI_CMD_SET_DTR_SIGNAL 6 /* INB, OOB */ | |
72 | #define DIGI_CMD_SET_RTS_SIGNAL 7 /* INB, OOB */ | |
73 | #define DIGI_CMD_READ_INPUT_SIGNALS 8 /* OOB */ | |
74 | #define DIGI_CMD_IFLUSH_FIFO 9 /* OOB */ | |
75 | #define DIGI_CMD_RECEIVE_ENABLE 10 /* INB, OOB */ | |
76 | #define DIGI_CMD_BREAK_CONTROL 11 /* INB, OOB */ | |
77 | #define DIGI_CMD_LOCAL_LOOPBACK 12 /* INB, OOB */ | |
78 | #define DIGI_CMD_TRANSMIT_IDLE 13 /* INB, OOB */ | |
79 | #define DIGI_CMD_READ_UART_REGISTER 14 /* OOB */ | |
80 | #define DIGI_CMD_WRITE_UART_REGISTER 15 /* INB, OOB */ | |
81 | #define DIGI_CMD_AND_UART_REGISTER 16 /* INB, OOB */ | |
82 | #define DIGI_CMD_OR_UART_REGISTER 17 /* INB, OOB */ | |
83 | #define DIGI_CMD_SEND_DATA 18 /* INB */ | |
84 | #define DIGI_CMD_RECEIVE_DATA 19 /* INB */ | |
85 | #define DIGI_CMD_RECEIVE_DISABLE 20 /* INB */ | |
86 | #define DIGI_CMD_GET_PORT_TYPE 21 /* OOB */ | |
87 | ||
88 | /* baud rates */ | |
89 | #define DIGI_BAUD_50 0 | |
90 | #define DIGI_BAUD_75 1 | |
91 | #define DIGI_BAUD_110 2 | |
92 | #define DIGI_BAUD_150 3 | |
93 | #define DIGI_BAUD_200 4 | |
94 | #define DIGI_BAUD_300 5 | |
95 | #define DIGI_BAUD_600 6 | |
96 | #define DIGI_BAUD_1200 7 | |
97 | #define DIGI_BAUD_1800 8 | |
98 | #define DIGI_BAUD_2400 9 | |
99 | #define DIGI_BAUD_4800 10 | |
100 | #define DIGI_BAUD_7200 11 | |
101 | #define DIGI_BAUD_9600 12 | |
102 | #define DIGI_BAUD_14400 13 | |
103 | #define DIGI_BAUD_19200 14 | |
104 | #define DIGI_BAUD_28800 15 | |
105 | #define DIGI_BAUD_38400 16 | |
106 | #define DIGI_BAUD_57600 17 | |
107 | #define DIGI_BAUD_76800 18 | |
108 | #define DIGI_BAUD_115200 19 | |
109 | #define DIGI_BAUD_153600 20 | |
110 | #define DIGI_BAUD_230400 21 | |
111 | #define DIGI_BAUD_460800 22 | |
112 | ||
113 | /* arguments */ | |
114 | #define DIGI_WORD_SIZE_5 0 | |
115 | #define DIGI_WORD_SIZE_6 1 | |
116 | #define DIGI_WORD_SIZE_7 2 | |
117 | #define DIGI_WORD_SIZE_8 3 | |
118 | ||
119 | #define DIGI_PARITY_NONE 0 | |
120 | #define DIGI_PARITY_ODD 1 | |
121 | #define DIGI_PARITY_EVEN 2 | |
122 | #define DIGI_PARITY_MARK 3 | |
123 | #define DIGI_PARITY_SPACE 4 | |
124 | ||
125 | #define DIGI_STOP_BITS_1 0 | |
126 | #define DIGI_STOP_BITS_2 1 | |
127 | ||
128 | #define DIGI_INPUT_FLOW_CONTROL_XON_XOFF 1 | |
129 | #define DIGI_INPUT_FLOW_CONTROL_RTS 2 | |
130 | #define DIGI_INPUT_FLOW_CONTROL_DTR 4 | |
131 | ||
132 | #define DIGI_OUTPUT_FLOW_CONTROL_XON_XOFF 1 | |
133 | #define DIGI_OUTPUT_FLOW_CONTROL_CTS 2 | |
134 | #define DIGI_OUTPUT_FLOW_CONTROL_DSR 4 | |
135 | ||
136 | #define DIGI_DTR_INACTIVE 0 | |
137 | #define DIGI_DTR_ACTIVE 1 | |
138 | #define DIGI_DTR_INPUT_FLOW_CONTROL 2 | |
139 | ||
140 | #define DIGI_RTS_INACTIVE 0 | |
141 | #define DIGI_RTS_ACTIVE 1 | |
142 | #define DIGI_RTS_INPUT_FLOW_CONTROL 2 | |
143 | #define DIGI_RTS_TOGGLE 3 | |
144 | ||
145 | #define DIGI_FLUSH_TX 1 | |
146 | #define DIGI_FLUSH_RX 2 | |
147 | #define DIGI_RESUME_TX 4 /* clears xoff condition */ | |
148 | ||
149 | #define DIGI_TRANSMIT_NOT_IDLE 0 | |
150 | #define DIGI_TRANSMIT_IDLE 1 | |
151 | ||
152 | #define DIGI_DISABLE 0 | |
153 | #define DIGI_ENABLE 1 | |
154 | ||
155 | #define DIGI_DEASSERT 0 | |
156 | #define DIGI_ASSERT 1 | |
157 | ||
158 | /* in band status codes */ | |
159 | #define DIGI_OVERRUN_ERROR 4 | |
160 | #define DIGI_PARITY_ERROR 8 | |
161 | #define DIGI_FRAMING_ERROR 16 | |
162 | #define DIGI_BREAK_ERROR 32 | |
163 | ||
164 | /* out of band status */ | |
165 | #define DIGI_NO_ERROR 0 | |
166 | #define DIGI_BAD_FIRST_PARAMETER 1 | |
167 | #define DIGI_BAD_SECOND_PARAMETER 2 | |
168 | #define DIGI_INVALID_LINE 3 | |
169 | #define DIGI_INVALID_OPCODE 4 | |
170 | ||
171 | /* input signals */ | |
172 | #define DIGI_READ_INPUT_SIGNALS_SLOT 1 | |
173 | #define DIGI_READ_INPUT_SIGNALS_ERR 2 | |
174 | #define DIGI_READ_INPUT_SIGNALS_BUSY 4 | |
175 | #define DIGI_READ_INPUT_SIGNALS_PE 8 | |
176 | #define DIGI_READ_INPUT_SIGNALS_CTS 16 | |
177 | #define DIGI_READ_INPUT_SIGNALS_DSR 32 | |
178 | #define DIGI_READ_INPUT_SIGNALS_RI 64 | |
179 | #define DIGI_READ_INPUT_SIGNALS_DCD 128 | |
180 | ||
181 | ||
182 | /* Structures */ | |
183 | ||
184 | struct digi_serial { | |
185 | spinlock_t ds_serial_lock; | |
186 | struct usb_serial_port *ds_oob_port; /* out-of-band port */ | |
187 | int ds_oob_port_num; /* index of out-of-band port */ | |
188 | int ds_device_started; | |
189 | }; | |
190 | ||
191 | struct digi_port { | |
192 | spinlock_t dp_port_lock; | |
193 | int dp_port_num; | |
194 | int dp_out_buf_len; | |
195 | unsigned char dp_out_buf[DIGI_OUT_BUF_SIZE]; | |
1da177e4 LT |
196 | int dp_write_urb_in_use; |
197 | unsigned int dp_modem_signals; | |
1da177e4 LT |
198 | int dp_transmit_idle; |
199 | wait_queue_head_t dp_transmit_idle_wait; | |
200 | int dp_throttled; | |
201 | int dp_throttle_restart; | |
202 | wait_queue_head_t dp_flush_wait; | |
1da177e4 LT |
203 | wait_queue_head_t dp_close_wait; /* wait queue for close */ |
204 | struct work_struct dp_wakeup_work; | |
c4028958 | 205 | struct usb_serial_port *dp_port; |
1da177e4 LT |
206 | }; |
207 | ||
208 | ||
209 | /* Local Function Declarations */ | |
210 | ||
c4028958 | 211 | static void digi_wakeup_write_lock(struct work_struct *work); |
c6d61269 AC |
212 | static int digi_write_oob_command(struct usb_serial_port *port, |
213 | unsigned char *buf, int count, int interruptible); | |
214 | static int digi_write_inb_command(struct usb_serial_port *port, | |
215 | unsigned char *buf, int count, unsigned long timeout); | |
216 | static int digi_set_modem_signals(struct usb_serial_port *port, | |
217 | unsigned int modem_signals, int interruptible); | |
218 | static int digi_transmit_idle(struct usb_serial_port *port, | |
219 | unsigned long timeout); | |
41ad427d AC |
220 | static void digi_rx_throttle(struct tty_struct *tty); |
221 | static void digi_rx_unthrottle(struct tty_struct *tty); | |
95da310e AC |
222 | static void digi_set_termios(struct tty_struct *tty, |
223 | struct usb_serial_port *port, struct ktermios *old_termios); | |
224 | static void digi_break_ctl(struct tty_struct *tty, int break_state); | |
60b33c13 | 225 | static int digi_tiocmget(struct tty_struct *tty); |
20b9d177 AC |
226 | static int digi_tiocmset(struct tty_struct *tty, unsigned int set, |
227 | unsigned int clear); | |
95da310e | 228 | static int digi_write(struct tty_struct *tty, struct usb_serial_port *port, |
20b9d177 | 229 | const unsigned char *buf, int count); |
c6d61269 | 230 | static void digi_write_bulk_callback(struct urb *urb); |
95da310e AC |
231 | static int digi_write_room(struct tty_struct *tty); |
232 | static int digi_chars_in_buffer(struct tty_struct *tty); | |
a509a7e4 | 233 | static int digi_open(struct tty_struct *tty, struct usb_serial_port *port); |
335f8514 | 234 | static void digi_close(struct usb_serial_port *port); |
335f8514 | 235 | static void digi_dtr_rts(struct usb_serial_port *port, int on); |
c6d61269 AC |
236 | static int digi_startup_device(struct usb_serial *serial); |
237 | static int digi_startup(struct usb_serial *serial); | |
f9c99bb8 AS |
238 | static void digi_disconnect(struct usb_serial *serial); |
239 | static void digi_release(struct usb_serial *serial); | |
fb44ff85 JH |
240 | static int digi_port_probe(struct usb_serial_port *port); |
241 | static int digi_port_remove(struct usb_serial_port *port); | |
c6d61269 AC |
242 | static void digi_read_bulk_callback(struct urb *urb); |
243 | static int digi_read_inb_callback(struct urb *urb); | |
244 | static int digi_read_oob_callback(struct urb *urb); | |
1da177e4 LT |
245 | |
246 | ||
7d40d7e8 | 247 | static const struct usb_device_id id_table_combined[] = { |
1da177e4 LT |
248 | { USB_DEVICE(DIGI_VENDOR_ID, DIGI_2_ID) }, |
249 | { USB_DEVICE(DIGI_VENDOR_ID, DIGI_4_ID) }, | |
250 | { } /* Terminating entry */ | |
251 | }; | |
252 | ||
7d40d7e8 | 253 | static const struct usb_device_id id_table_2[] = { |
1da177e4 LT |
254 | { USB_DEVICE(DIGI_VENDOR_ID, DIGI_2_ID) }, |
255 | { } /* Terminating entry */ | |
256 | }; | |
257 | ||
7d40d7e8 | 258 | static const struct usb_device_id id_table_4[] = { |
1da177e4 LT |
259 | { USB_DEVICE(DIGI_VENDOR_ID, DIGI_4_ID) }, |
260 | { } /* Terminating entry */ | |
261 | }; | |
262 | ||
41ad427d | 263 | MODULE_DEVICE_TABLE(usb, id_table_combined); |
1da177e4 | 264 | |
1da177e4 LT |
265 | /* device info needed for the Digi serial converter */ |
266 | ||
ea65370d | 267 | static struct usb_serial_driver digi_acceleport_2_device = { |
18fcac35 | 268 | .driver = { |
269bda1c GKH |
269 | .owner = THIS_MODULE, |
270 | .name = "digi_2", | |
18fcac35 | 271 | }, |
269bda1c | 272 | .description = "Digi 2 port USB adapter", |
1da177e4 | 273 | .id_table = id_table_2, |
1da177e4 LT |
274 | .num_ports = 3, |
275 | .open = digi_open, | |
276 | .close = digi_close, | |
335f8514 | 277 | .dtr_rts = digi_dtr_rts, |
1da177e4 LT |
278 | .write = digi_write, |
279 | .write_room = digi_write_room, | |
280 | .write_bulk_callback = digi_write_bulk_callback, | |
281 | .read_bulk_callback = digi_read_bulk_callback, | |
282 | .chars_in_buffer = digi_chars_in_buffer, | |
283 | .throttle = digi_rx_throttle, | |
284 | .unthrottle = digi_rx_unthrottle, | |
1da177e4 LT |
285 | .set_termios = digi_set_termios, |
286 | .break_ctl = digi_break_ctl, | |
287 | .tiocmget = digi_tiocmget, | |
288 | .tiocmset = digi_tiocmset, | |
289 | .attach = digi_startup, | |
f9c99bb8 AS |
290 | .disconnect = digi_disconnect, |
291 | .release = digi_release, | |
fb44ff85 JH |
292 | .port_probe = digi_port_probe, |
293 | .port_remove = digi_port_remove, | |
1da177e4 LT |
294 | }; |
295 | ||
ea65370d | 296 | static struct usb_serial_driver digi_acceleport_4_device = { |
18fcac35 | 297 | .driver = { |
269bda1c GKH |
298 | .owner = THIS_MODULE, |
299 | .name = "digi_4", | |
18fcac35 | 300 | }, |
269bda1c | 301 | .description = "Digi 4 port USB adapter", |
1da177e4 | 302 | .id_table = id_table_4, |
1da177e4 LT |
303 | .num_ports = 4, |
304 | .open = digi_open, | |
305 | .close = digi_close, | |
306 | .write = digi_write, | |
307 | .write_room = digi_write_room, | |
308 | .write_bulk_callback = digi_write_bulk_callback, | |
309 | .read_bulk_callback = digi_read_bulk_callback, | |
310 | .chars_in_buffer = digi_chars_in_buffer, | |
311 | .throttle = digi_rx_throttle, | |
312 | .unthrottle = digi_rx_unthrottle, | |
1da177e4 LT |
313 | .set_termios = digi_set_termios, |
314 | .break_ctl = digi_break_ctl, | |
315 | .tiocmget = digi_tiocmget, | |
316 | .tiocmset = digi_tiocmset, | |
317 | .attach = digi_startup, | |
f9c99bb8 AS |
318 | .disconnect = digi_disconnect, |
319 | .release = digi_release, | |
fb44ff85 JH |
320 | .port_probe = digi_port_probe, |
321 | .port_remove = digi_port_remove, | |
1da177e4 LT |
322 | }; |
323 | ||
97b6b6d2 AS |
324 | static struct usb_serial_driver * const serial_drivers[] = { |
325 | &digi_acceleport_2_device, &digi_acceleport_4_device, NULL | |
326 | }; | |
1da177e4 LT |
327 | |
328 | /* Functions */ | |
329 | ||
330 | /* | |
41ad427d AC |
331 | * Cond Wait Interruptible Timeout Irqrestore |
332 | * | |
333 | * Do spin_unlock_irqrestore and interruptible_sleep_on_timeout | |
334 | * so that wake ups are not lost if they occur between the unlock | |
335 | * and the sleep. In other words, spin_unlock_irqrestore and | |
336 | * interruptible_sleep_on_timeout are "atomic" with respect to | |
337 | * wake ups. This is used to implement condition variables. | |
338 | * | |
339 | * interruptible_sleep_on_timeout is deprecated and has been replaced | |
340 | * with the equivalent code. | |
341 | */ | |
1da177e4 | 342 | |
c6d61269 | 343 | static long cond_wait_interruptible_timeout_irqrestore( |
1da177e4 | 344 | wait_queue_head_t *q, long timeout, |
c6d61269 | 345 | spinlock_t *lock, unsigned long flags) |
5a33956a | 346 | __releases(lock) |
1da177e4 LT |
347 | { |
348 | DEFINE_WAIT(wait); | |
349 | ||
45f23f18 | 350 | prepare_to_wait(q, &wait, TASK_INTERRUPTIBLE); |
1da177e4 LT |
351 | spin_unlock_irqrestore(lock, flags); |
352 | timeout = schedule_timeout(timeout); | |
353 | finish_wait(q, &wait); | |
354 | ||
355 | return timeout; | |
1da177e4 LT |
356 | } |
357 | ||
358 | ||
359 | /* | |
41ad427d AC |
360 | * Digi Wakeup Write |
361 | * | |
362 | * Wake up port, line discipline, and tty processes sleeping | |
363 | * on writes. | |
364 | */ | |
1da177e4 | 365 | |
c4028958 | 366 | static void digi_wakeup_write_lock(struct work_struct *work) |
1da177e4 | 367 | { |
41ad427d AC |
368 | struct digi_port *priv = |
369 | container_of(work, struct digi_port, dp_wakeup_work); | |
c4028958 | 370 | struct usb_serial_port *port = priv->dp_port; |
1da177e4 | 371 | unsigned long flags; |
1da177e4 | 372 | |
c6d61269 | 373 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
6aad04f2 | 374 | tty_port_tty_wakeup(&port->port); |
c6d61269 | 375 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
1da177e4 LT |
376 | } |
377 | ||
1da177e4 | 378 | /* |
41ad427d AC |
379 | * Digi Write OOB Command |
380 | * | |
381 | * Write commands on the out of band port. Commands are 4 | |
382 | * bytes each, multiple commands can be sent at once, and | |
383 | * no command will be split across USB packets. Returns 0 | |
384 | * if successful, -EINTR if interrupted while sleeping and | |
385 | * the interruptible flag is true, or a negative error | |
386 | * returned by usb_submit_urb. | |
387 | */ | |
1da177e4 | 388 | |
c6d61269 AC |
389 | static int digi_write_oob_command(struct usb_serial_port *port, |
390 | unsigned char *buf, int count, int interruptible) | |
1da177e4 | 391 | { |
1da177e4 LT |
392 | int ret = 0; |
393 | int len; | |
394 | struct usb_serial_port *oob_port = (struct usb_serial_port *)((struct digi_serial *)(usb_get_serial_data(port->serial)))->ds_oob_port; | |
395 | struct digi_port *oob_priv = usb_get_serial_port_data(oob_port); | |
396 | unsigned long flags = 0; | |
397 | ||
f9dfbebb GKH |
398 | dev_dbg(&port->dev, |
399 | "digi_write_oob_command: TOP: port=%d, count=%d\n", | |
400 | oob_priv->dp_port_num, count); | |
1da177e4 | 401 | |
c6d61269 | 402 | spin_lock_irqsave(&oob_priv->dp_port_lock, flags); |
41ad427d | 403 | while (count > 0) { |
50de36f7 | 404 | while (oob_priv->dp_write_urb_in_use) { |
1da177e4 LT |
405 | cond_wait_interruptible_timeout_irqrestore( |
406 | &oob_port->write_wait, DIGI_RETRY_TIMEOUT, | |
c6d61269 AC |
407 | &oob_priv->dp_port_lock, flags); |
408 | if (interruptible && signal_pending(current)) | |
409 | return -EINTR; | |
410 | spin_lock_irqsave(&oob_priv->dp_port_lock, flags); | |
1da177e4 LT |
411 | } |
412 | ||
413 | /* len must be a multiple of 4, so commands are not split */ | |
c6d61269 AC |
414 | len = min(count, oob_port->bulk_out_size); |
415 | if (len > 4) | |
1da177e4 | 416 | len &= ~3; |
c6d61269 | 417 | memcpy(oob_port->write_urb->transfer_buffer, buf, len); |
1da177e4 | 418 | oob_port->write_urb->transfer_buffer_length = len; |
41ad427d AC |
419 | ret = usb_submit_urb(oob_port->write_urb, GFP_ATOMIC); |
420 | if (ret == 0) { | |
1da177e4 LT |
421 | oob_priv->dp_write_urb_in_use = 1; |
422 | count -= len; | |
423 | buf += len; | |
424 | } | |
1da177e4 | 425 | } |
c6d61269 AC |
426 | spin_unlock_irqrestore(&oob_priv->dp_port_lock, flags); |
427 | if (ret) | |
194343d9 GKH |
428 | dev_err(&port->dev, "%s: usb_submit_urb failed, ret=%d\n", |
429 | __func__, ret); | |
c6d61269 | 430 | return ret; |
1da177e4 LT |
431 | |
432 | } | |
433 | ||
434 | ||
435 | /* | |
41ad427d AC |
436 | * Digi Write In Band Command |
437 | * | |
438 | * Write commands on the given port. Commands are 4 | |
439 | * bytes each, multiple commands can be sent at once, and | |
440 | * no command will be split across USB packets. If timeout | |
441 | * is non-zero, write in band command will return after | |
442 | * waiting unsuccessfully for the URB status to clear for | |
443 | * timeout ticks. Returns 0 if successful, or a negative | |
444 | * error returned by digi_write. | |
445 | */ | |
1da177e4 | 446 | |
c6d61269 AC |
447 | static int digi_write_inb_command(struct usb_serial_port *port, |
448 | unsigned char *buf, int count, unsigned long timeout) | |
1da177e4 | 449 | { |
1da177e4 LT |
450 | int ret = 0; |
451 | int len; | |
452 | struct digi_port *priv = usb_get_serial_port_data(port); | |
453 | unsigned char *data = port->write_urb->transfer_buffer; | |
454 | unsigned long flags = 0; | |
455 | ||
f9dfbebb | 456 | dev_dbg(&port->dev, "digi_write_inb_command: TOP: port=%d, count=%d\n", |
c6d61269 | 457 | priv->dp_port_num, count); |
1da177e4 | 458 | |
c6d61269 | 459 | if (timeout) |
1da177e4 LT |
460 | timeout += jiffies; |
461 | else | |
462 | timeout = ULONG_MAX; | |
463 | ||
c6d61269 | 464 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
41ad427d | 465 | while (count > 0 && ret == 0) { |
50de36f7 GKH |
466 | while (priv->dp_write_urb_in_use && |
467 | time_before(jiffies, timeout)) { | |
1da177e4 LT |
468 | cond_wait_interruptible_timeout_irqrestore( |
469 | &port->write_wait, DIGI_RETRY_TIMEOUT, | |
c6d61269 AC |
470 | &priv->dp_port_lock, flags); |
471 | if (signal_pending(current)) | |
472 | return -EINTR; | |
473 | spin_lock_irqsave(&priv->dp_port_lock, flags); | |
1da177e4 LT |
474 | } |
475 | ||
476 | /* len must be a multiple of 4 and small enough to */ | |
477 | /* guarantee the write will send buffered data first, */ | |
478 | /* so commands are in order with data and not split */ | |
c6d61269 AC |
479 | len = min(count, port->bulk_out_size-2-priv->dp_out_buf_len); |
480 | if (len > 4) | |
1da177e4 LT |
481 | len &= ~3; |
482 | ||
483 | /* write any buffered data first */ | |
c6d61269 | 484 | if (priv->dp_out_buf_len > 0) { |
1da177e4 LT |
485 | data[0] = DIGI_CMD_SEND_DATA; |
486 | data[1] = priv->dp_out_buf_len; | |
c6d61269 AC |
487 | memcpy(data + 2, priv->dp_out_buf, |
488 | priv->dp_out_buf_len); | |
489 | memcpy(data + 2 + priv->dp_out_buf_len, buf, len); | |
1da177e4 | 490 | port->write_urb->transfer_buffer_length |
c6d61269 | 491 | = priv->dp_out_buf_len + 2 + len; |
1da177e4 | 492 | } else { |
c6d61269 | 493 | memcpy(data, buf, len); |
1da177e4 LT |
494 | port->write_urb->transfer_buffer_length = len; |
495 | } | |
1da177e4 | 496 | |
41ad427d AC |
497 | ret = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
498 | if (ret == 0) { | |
1da177e4 LT |
499 | priv->dp_write_urb_in_use = 1; |
500 | priv->dp_out_buf_len = 0; | |
501 | count -= len; | |
502 | buf += len; | |
503 | } | |
504 | ||
505 | } | |
c6d61269 | 506 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
1da177e4 | 507 | |
c6d61269 | 508 | if (ret) |
194343d9 GKH |
509 | dev_err(&port->dev, |
510 | "%s: usb_submit_urb failed, ret=%d, port=%d\n", | |
441b62c1 | 511 | __func__, ret, priv->dp_port_num); |
c6d61269 | 512 | return ret; |
1da177e4 LT |
513 | } |
514 | ||
515 | ||
516 | /* | |
41ad427d AC |
517 | * Digi Set Modem Signals |
518 | * | |
519 | * Sets or clears DTR and RTS on the port, according to the | |
520 | * modem_signals argument. Use TIOCM_DTR and TIOCM_RTS flags | |
521 | * for the modem_signals argument. Returns 0 if successful, | |
522 | * -EINTR if interrupted while sleeping, or a non-zero error | |
523 | * returned by usb_submit_urb. | |
524 | */ | |
1da177e4 | 525 | |
c6d61269 AC |
526 | static int digi_set_modem_signals(struct usb_serial_port *port, |
527 | unsigned int modem_signals, int interruptible) | |
1da177e4 LT |
528 | { |
529 | ||
530 | int ret; | |
531 | struct digi_port *port_priv = usb_get_serial_port_data(port); | |
41ad427d | 532 | struct usb_serial_port *oob_port = (struct usb_serial_port *) ((struct digi_serial *)(usb_get_serial_data(port->serial)))->ds_oob_port; |
1da177e4 LT |
533 | struct digi_port *oob_priv = usb_get_serial_port_data(oob_port); |
534 | unsigned char *data = oob_port->write_urb->transfer_buffer; | |
535 | unsigned long flags = 0; | |
536 | ||
537 | ||
f9dfbebb GKH |
538 | dev_dbg(&port->dev, |
539 | "digi_set_modem_signals: TOP: port=%d, modem_signals=0x%x\n", | |
c6d61269 | 540 | port_priv->dp_port_num, modem_signals); |
1da177e4 | 541 | |
c6d61269 AC |
542 | spin_lock_irqsave(&oob_priv->dp_port_lock, flags); |
543 | spin_lock(&port_priv->dp_port_lock); | |
1da177e4 | 544 | |
50de36f7 | 545 | while (oob_priv->dp_write_urb_in_use) { |
c6d61269 | 546 | spin_unlock(&port_priv->dp_port_lock); |
1da177e4 LT |
547 | cond_wait_interruptible_timeout_irqrestore( |
548 | &oob_port->write_wait, DIGI_RETRY_TIMEOUT, | |
c6d61269 AC |
549 | &oob_priv->dp_port_lock, flags); |
550 | if (interruptible && signal_pending(current)) | |
551 | return -EINTR; | |
552 | spin_lock_irqsave(&oob_priv->dp_port_lock, flags); | |
553 | spin_lock(&port_priv->dp_port_lock); | |
1da177e4 | 554 | } |
1da177e4 LT |
555 | data[0] = DIGI_CMD_SET_DTR_SIGNAL; |
556 | data[1] = port_priv->dp_port_num; | |
41ad427d AC |
557 | data[2] = (modem_signals & TIOCM_DTR) ? |
558 | DIGI_DTR_ACTIVE : DIGI_DTR_INACTIVE; | |
1da177e4 | 559 | data[3] = 0; |
1da177e4 LT |
560 | data[4] = DIGI_CMD_SET_RTS_SIGNAL; |
561 | data[5] = port_priv->dp_port_num; | |
41ad427d AC |
562 | data[6] = (modem_signals & TIOCM_RTS) ? |
563 | DIGI_RTS_ACTIVE : DIGI_RTS_INACTIVE; | |
1da177e4 LT |
564 | data[7] = 0; |
565 | ||
566 | oob_port->write_urb->transfer_buffer_length = 8; | |
1da177e4 | 567 | |
41ad427d AC |
568 | ret = usb_submit_urb(oob_port->write_urb, GFP_ATOMIC); |
569 | if (ret == 0) { | |
1da177e4 LT |
570 | oob_priv->dp_write_urb_in_use = 1; |
571 | port_priv->dp_modem_signals = | |
572 | (port_priv->dp_modem_signals&~(TIOCM_DTR|TIOCM_RTS)) | |
573 | | (modem_signals&(TIOCM_DTR|TIOCM_RTS)); | |
574 | } | |
c6d61269 AC |
575 | spin_unlock(&port_priv->dp_port_lock); |
576 | spin_unlock_irqrestore(&oob_priv->dp_port_lock, flags); | |
577 | if (ret) | |
194343d9 GKH |
578 | dev_err(&port->dev, "%s: usb_submit_urb failed, ret=%d\n", |
579 | __func__, ret); | |
c6d61269 | 580 | return ret; |
1da177e4 LT |
581 | } |
582 | ||
1da177e4 | 583 | /* |
41ad427d AC |
584 | * Digi Transmit Idle |
585 | * | |
586 | * Digi transmit idle waits, up to timeout ticks, for the transmitter | |
587 | * to go idle. It returns 0 if successful or a negative error. | |
588 | * | |
589 | * There are race conditions here if more than one process is calling | |
590 | * digi_transmit_idle on the same port at the same time. However, this | |
591 | * is only called from close, and only one process can be in close on a | |
592 | * port at a time, so its ok. | |
593 | */ | |
1da177e4 | 594 | |
c6d61269 AC |
595 | static int digi_transmit_idle(struct usb_serial_port *port, |
596 | unsigned long timeout) | |
1da177e4 | 597 | { |
1da177e4 LT |
598 | int ret; |
599 | unsigned char buf[2]; | |
600 | struct digi_port *priv = usb_get_serial_port_data(port); | |
601 | unsigned long flags = 0; | |
602 | ||
c6d61269 | 603 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 | 604 | priv->dp_transmit_idle = 0; |
c6d61269 | 605 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
1da177e4 LT |
606 | |
607 | buf[0] = DIGI_CMD_TRANSMIT_IDLE; | |
608 | buf[1] = 0; | |
609 | ||
610 | timeout += jiffies; | |
611 | ||
41ad427d AC |
612 | ret = digi_write_inb_command(port, buf, 2, timeout - jiffies); |
613 | if (ret != 0) | |
c6d61269 | 614 | return ret; |
1da177e4 | 615 | |
c6d61269 | 616 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 | 617 | |
41ad427d | 618 | while (time_before(jiffies, timeout) && !priv->dp_transmit_idle) { |
1da177e4 LT |
619 | cond_wait_interruptible_timeout_irqrestore( |
620 | &priv->dp_transmit_idle_wait, DIGI_RETRY_TIMEOUT, | |
c6d61269 AC |
621 | &priv->dp_port_lock, flags); |
622 | if (signal_pending(current)) | |
623 | return -EINTR; | |
624 | spin_lock_irqsave(&priv->dp_port_lock, flags); | |
1da177e4 | 625 | } |
1da177e4 | 626 | priv->dp_transmit_idle = 0; |
c6d61269 AC |
627 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
628 | return 0; | |
1da177e4 LT |
629 | |
630 | } | |
631 | ||
632 | ||
95da310e | 633 | static void digi_rx_throttle(struct tty_struct *tty) |
1da177e4 | 634 | { |
1da177e4 | 635 | unsigned long flags; |
95da310e | 636 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
637 | struct digi_port *priv = usb_get_serial_port_data(port); |
638 | ||
1da177e4 | 639 | /* stop receiving characters by not resubmitting the read urb */ |
c6d61269 | 640 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 LT |
641 | priv->dp_throttled = 1; |
642 | priv->dp_throttle_restart = 0; | |
c6d61269 | 643 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
1da177e4 LT |
644 | } |
645 | ||
646 | ||
95da310e | 647 | static void digi_rx_unthrottle(struct tty_struct *tty) |
1da177e4 | 648 | { |
1da177e4 | 649 | int ret = 0; |
1da177e4 | 650 | unsigned long flags; |
95da310e | 651 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 652 | struct digi_port *priv = usb_get_serial_port_data(port); |
1da177e4 | 653 | |
c6d61269 | 654 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 | 655 | |
1da177e4 | 656 | /* restart read chain */ |
5833041f | 657 | if (priv->dp_throttle_restart) |
c6d61269 | 658 | ret = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
1da177e4 | 659 | |
ba6b702f JH |
660 | /* turn throttle off */ |
661 | priv->dp_throttled = 0; | |
662 | priv->dp_throttle_restart = 0; | |
663 | ||
c6d61269 | 664 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
1da177e4 | 665 | |
c6d61269 | 666 | if (ret) |
194343d9 GKH |
667 | dev_err(&port->dev, |
668 | "%s: usb_submit_urb failed, ret=%d, port=%d\n", | |
441b62c1 | 669 | __func__, ret, priv->dp_port_num); |
1da177e4 LT |
670 | } |
671 | ||
672 | ||
41ad427d | 673 | static void digi_set_termios(struct tty_struct *tty, |
95da310e | 674 | struct usb_serial_port *port, struct ktermios *old_termios) |
1da177e4 | 675 | { |
1da177e4 | 676 | struct digi_port *priv = usb_get_serial_port_data(port); |
f9dfbebb | 677 | struct device *dev = &port->dev; |
adc8d746 AC |
678 | unsigned int iflag = tty->termios.c_iflag; |
679 | unsigned int cflag = tty->termios.c_cflag; | |
1da177e4 LT |
680 | unsigned int old_iflag = old_termios->c_iflag; |
681 | unsigned int old_cflag = old_termios->c_cflag; | |
682 | unsigned char buf[32]; | |
683 | unsigned int modem_signals; | |
41ad427d | 684 | int arg, ret; |
1da177e4 | 685 | int i = 0; |
c6d61269 | 686 | speed_t baud; |
1da177e4 | 687 | |
f9dfbebb GKH |
688 | dev_dbg(dev, |
689 | "digi_set_termios: TOP: port=%d, iflag=0x%x, old_iflag=0x%x, cflag=0x%x, old_cflag=0x%x\n", | |
690 | priv->dp_port_num, iflag, old_iflag, cflag, old_cflag); | |
1da177e4 LT |
691 | |
692 | /* set baud rate */ | |
41ad427d AC |
693 | baud = tty_get_baud_rate(tty); |
694 | if (baud != tty_termios_baud_rate(old_termios)) { | |
1da177e4 LT |
695 | arg = -1; |
696 | ||
697 | /* reassert DTR and (maybe) RTS on transition from B0 */ | |
9db276f8 | 698 | if ((old_cflag & CBAUD) == B0) { |
1da177e4 LT |
699 | /* don't set RTS if using hardware flow control */ |
700 | /* and throttling input */ | |
701 | modem_signals = TIOCM_DTR; | |
97ef38b8 | 702 | if (!C_CRTSCTS(tty) || !tty_throttled(tty)) |
1da177e4 | 703 | modem_signals |= TIOCM_RTS; |
c6d61269 | 704 | digi_set_modem_signals(port, modem_signals, 1); |
1da177e4 | 705 | } |
c6d61269 | 706 | switch (baud) { |
41ad427d AC |
707 | /* drop DTR and RTS on transition to B0 */ |
708 | case 0: digi_set_modem_signals(port, 0, 1); break; | |
709 | case 50: arg = DIGI_BAUD_50; break; | |
710 | case 75: arg = DIGI_BAUD_75; break; | |
711 | case 110: arg = DIGI_BAUD_110; break; | |
712 | case 150: arg = DIGI_BAUD_150; break; | |
713 | case 200: arg = DIGI_BAUD_200; break; | |
714 | case 300: arg = DIGI_BAUD_300; break; | |
715 | case 600: arg = DIGI_BAUD_600; break; | |
716 | case 1200: arg = DIGI_BAUD_1200; break; | |
717 | case 1800: arg = DIGI_BAUD_1800; break; | |
718 | case 2400: arg = DIGI_BAUD_2400; break; | |
719 | case 4800: arg = DIGI_BAUD_4800; break; | |
720 | case 9600: arg = DIGI_BAUD_9600; break; | |
721 | case 19200: arg = DIGI_BAUD_19200; break; | |
722 | case 38400: arg = DIGI_BAUD_38400; break; | |
723 | case 57600: arg = DIGI_BAUD_57600; break; | |
724 | case 115200: arg = DIGI_BAUD_115200; break; | |
725 | case 230400: arg = DIGI_BAUD_230400; break; | |
726 | case 460800: arg = DIGI_BAUD_460800; break; | |
727 | default: | |
728 | arg = DIGI_BAUD_9600; | |
729 | baud = 9600; | |
730 | break; | |
1da177e4 | 731 | } |
c6d61269 | 732 | if (arg != -1) { |
1da177e4 LT |
733 | buf[i++] = DIGI_CMD_SET_BAUD_RATE; |
734 | buf[i++] = priv->dp_port_num; | |
735 | buf[i++] = arg; | |
736 | buf[i++] = 0; | |
737 | } | |
1da177e4 | 738 | } |
1da177e4 | 739 | /* set parity */ |
adc8d746 | 740 | tty->termios.c_cflag &= ~CMSPAR; |
7fa36a99 | 741 | |
c6d61269 AC |
742 | if ((cflag&(PARENB|PARODD)) != (old_cflag&(PARENB|PARODD))) { |
743 | if (cflag&PARENB) { | |
744 | if (cflag&PARODD) | |
1da177e4 LT |
745 | arg = DIGI_PARITY_ODD; |
746 | else | |
747 | arg = DIGI_PARITY_EVEN; | |
748 | } else { | |
749 | arg = DIGI_PARITY_NONE; | |
750 | } | |
1da177e4 LT |
751 | buf[i++] = DIGI_CMD_SET_PARITY; |
752 | buf[i++] = priv->dp_port_num; | |
753 | buf[i++] = arg; | |
754 | buf[i++] = 0; | |
1da177e4 | 755 | } |
1da177e4 | 756 | /* set word size */ |
c6d61269 | 757 | if ((cflag&CSIZE) != (old_cflag&CSIZE)) { |
1da177e4 | 758 | arg = -1; |
c6d61269 | 759 | switch (cflag&CSIZE) { |
1da177e4 LT |
760 | case CS5: arg = DIGI_WORD_SIZE_5; break; |
761 | case CS6: arg = DIGI_WORD_SIZE_6; break; | |
762 | case CS7: arg = DIGI_WORD_SIZE_7; break; | |
763 | case CS8: arg = DIGI_WORD_SIZE_8; break; | |
764 | default: | |
f9dfbebb GKH |
765 | dev_dbg(dev, |
766 | "digi_set_termios: can't handle word size %d\n", | |
c6d61269 | 767 | (cflag&CSIZE)); |
1da177e4 LT |
768 | break; |
769 | } | |
770 | ||
c6d61269 | 771 | if (arg != -1) { |
1da177e4 LT |
772 | buf[i++] = DIGI_CMD_SET_WORD_SIZE; |
773 | buf[i++] = priv->dp_port_num; | |
774 | buf[i++] = arg; | |
775 | buf[i++] = 0; | |
776 | } | |
777 | ||
778 | } | |
779 | ||
780 | /* set stop bits */ | |
c6d61269 | 781 | if ((cflag&CSTOPB) != (old_cflag&CSTOPB)) { |
1da177e4 | 782 | |
c6d61269 | 783 | if ((cflag&CSTOPB)) |
1da177e4 LT |
784 | arg = DIGI_STOP_BITS_2; |
785 | else | |
786 | arg = DIGI_STOP_BITS_1; | |
787 | ||
788 | buf[i++] = DIGI_CMD_SET_STOP_BITS; | |
789 | buf[i++] = priv->dp_port_num; | |
790 | buf[i++] = arg; | |
791 | buf[i++] = 0; | |
792 | ||
793 | } | |
794 | ||
795 | /* set input flow control */ | |
c6d61269 AC |
796 | if ((iflag&IXOFF) != (old_iflag&IXOFF) |
797 | || (cflag&CRTSCTS) != (old_cflag&CRTSCTS)) { | |
1da177e4 | 798 | arg = 0; |
c6d61269 | 799 | if (iflag&IXOFF) |
1da177e4 LT |
800 | arg |= DIGI_INPUT_FLOW_CONTROL_XON_XOFF; |
801 | else | |
802 | arg &= ~DIGI_INPUT_FLOW_CONTROL_XON_XOFF; | |
803 | ||
c6d61269 | 804 | if (cflag&CRTSCTS) { |
1da177e4 LT |
805 | arg |= DIGI_INPUT_FLOW_CONTROL_RTS; |
806 | ||
807 | /* On USB-4 it is necessary to assert RTS prior */ | |
808 | /* to selecting RTS input flow control. */ | |
809 | buf[i++] = DIGI_CMD_SET_RTS_SIGNAL; | |
810 | buf[i++] = priv->dp_port_num; | |
811 | buf[i++] = DIGI_RTS_ACTIVE; | |
812 | buf[i++] = 0; | |
813 | ||
814 | } else { | |
815 | arg &= ~DIGI_INPUT_FLOW_CONTROL_RTS; | |
816 | } | |
1da177e4 LT |
817 | buf[i++] = DIGI_CMD_SET_INPUT_FLOW_CONTROL; |
818 | buf[i++] = priv->dp_port_num; | |
819 | buf[i++] = arg; | |
820 | buf[i++] = 0; | |
1da177e4 LT |
821 | } |
822 | ||
823 | /* set output flow control */ | |
7fa36a99 AC |
824 | if ((iflag & IXON) != (old_iflag & IXON) |
825 | || (cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { | |
1da177e4 | 826 | arg = 0; |
7fa36a99 | 827 | if (iflag & IXON) |
1da177e4 LT |
828 | arg |= DIGI_OUTPUT_FLOW_CONTROL_XON_XOFF; |
829 | else | |
830 | arg &= ~DIGI_OUTPUT_FLOW_CONTROL_XON_XOFF; | |
831 | ||
7fa36a99 | 832 | if (cflag & CRTSCTS) { |
1da177e4 LT |
833 | arg |= DIGI_OUTPUT_FLOW_CONTROL_CTS; |
834 | } else { | |
835 | arg &= ~DIGI_OUTPUT_FLOW_CONTROL_CTS; | |
1da177e4 LT |
836 | } |
837 | ||
838 | buf[i++] = DIGI_CMD_SET_OUTPUT_FLOW_CONTROL; | |
839 | buf[i++] = priv->dp_port_num; | |
840 | buf[i++] = arg; | |
841 | buf[i++] = 0; | |
1da177e4 LT |
842 | } |
843 | ||
844 | /* set receive enable/disable */ | |
7fa36a99 AC |
845 | if ((cflag & CREAD) != (old_cflag & CREAD)) { |
846 | if (cflag & CREAD) | |
1da177e4 LT |
847 | arg = DIGI_ENABLE; |
848 | else | |
849 | arg = DIGI_DISABLE; | |
850 | ||
851 | buf[i++] = DIGI_CMD_RECEIVE_ENABLE; | |
852 | buf[i++] = priv->dp_port_num; | |
853 | buf[i++] = arg; | |
854 | buf[i++] = 0; | |
1da177e4 | 855 | } |
41ad427d AC |
856 | ret = digi_write_oob_command(port, buf, i, 1); |
857 | if (ret != 0) | |
f9dfbebb | 858 | dev_dbg(dev, "digi_set_termios: write oob failed, ret=%d\n", ret); |
7fa36a99 | 859 | tty_encode_baud_rate(tty, baud, baud); |
1da177e4 LT |
860 | } |
861 | ||
862 | ||
95da310e | 863 | static void digi_break_ctl(struct tty_struct *tty, int break_state) |
1da177e4 | 864 | { |
95da310e | 865 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
866 | unsigned char buf[4]; |
867 | ||
1da177e4 LT |
868 | buf[0] = DIGI_CMD_BREAK_CONTROL; |
869 | buf[1] = 2; /* length */ | |
870 | buf[2] = break_state ? 1 : 0; | |
871 | buf[3] = 0; /* pad */ | |
c6d61269 | 872 | digi_write_inb_command(port, buf, 4, 0); |
1da177e4 LT |
873 | } |
874 | ||
875 | ||
60b33c13 | 876 | static int digi_tiocmget(struct tty_struct *tty) |
1da177e4 | 877 | { |
95da310e | 878 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
879 | struct digi_port *priv = usb_get_serial_port_data(port); |
880 | unsigned int val; | |
881 | unsigned long flags; | |
882 | ||
c6d61269 | 883 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 | 884 | val = priv->dp_modem_signals; |
c6d61269 | 885 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
1da177e4 LT |
886 | return val; |
887 | } | |
888 | ||
889 | ||
20b9d177 AC |
890 | static int digi_tiocmset(struct tty_struct *tty, |
891 | unsigned int set, unsigned int clear) | |
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 & ~clear) | set; |
c6d61269 AC |
900 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
901 | return digi_set_modem_signals(port, val, 1); | |
1da177e4 LT |
902 | } |
903 | ||
904 | ||
95da310e AC |
905 | static int digi_write(struct tty_struct *tty, struct usb_serial_port *port, |
906 | const unsigned char *buf, int count) | |
1da177e4 LT |
907 | { |
908 | ||
41ad427d | 909 | int ret, data_len, new_len; |
1da177e4 LT |
910 | struct digi_port *priv = usb_get_serial_port_data(port); |
911 | unsigned char *data = port->write_urb->transfer_buffer; | |
912 | unsigned long flags = 0; | |
913 | ||
f9dfbebb GKH |
914 | dev_dbg(&port->dev, |
915 | "digi_write: TOP: port=%d, count=%d, in_interrupt=%ld\n", | |
c6d61269 | 916 | priv->dp_port_num, count, in_interrupt()); |
1da177e4 LT |
917 | |
918 | /* copy user data (which can sleep) before getting spin lock */ | |
c6d61269 AC |
919 | count = min(count, port->bulk_out_size-2); |
920 | count = min(64, count); | |
1da177e4 LT |
921 | |
922 | /* be sure only one write proceeds at a time */ | |
923 | /* there are races on the port private buffer */ | |
c6d61269 | 924 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 LT |
925 | |
926 | /* wait for urb status clear to submit another urb */ | |
50de36f7 | 927 | if (priv->dp_write_urb_in_use) { |
1da177e4 | 928 | /* buffer data if count is 1 (probably put_char) if possible */ |
c6d61269 | 929 | if (count == 1 && priv->dp_out_buf_len < DIGI_OUT_BUF_SIZE) { |
1da177e4 LT |
930 | priv->dp_out_buf[priv->dp_out_buf_len++] = *buf; |
931 | new_len = 1; | |
932 | } else { | |
933 | new_len = 0; | |
934 | } | |
c6d61269 AC |
935 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
936 | return new_len; | |
1da177e4 LT |
937 | } |
938 | ||
939 | /* allow space for any buffered data and for new data, up to */ | |
940 | /* transfer buffer size - 2 (for command and length bytes) */ | |
941 | new_len = min(count, port->bulk_out_size-2-priv->dp_out_buf_len); | |
942 | data_len = new_len + priv->dp_out_buf_len; | |
943 | ||
c6d61269 AC |
944 | if (data_len == 0) { |
945 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); | |
946 | return 0; | |
1da177e4 LT |
947 | } |
948 | ||
949 | port->write_urb->transfer_buffer_length = data_len+2; | |
1da177e4 LT |
950 | |
951 | *data++ = DIGI_CMD_SEND_DATA; | |
952 | *data++ = data_len; | |
953 | ||
954 | /* copy in buffered data first */ | |
c6d61269 | 955 | memcpy(data, priv->dp_out_buf, priv->dp_out_buf_len); |
1da177e4 LT |
956 | data += priv->dp_out_buf_len; |
957 | ||
958 | /* copy in new data */ | |
c6d61269 | 959 | memcpy(data, buf, new_len); |
1da177e4 | 960 | |
41ad427d AC |
961 | ret = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
962 | if (ret == 0) { | |
1da177e4 LT |
963 | priv->dp_write_urb_in_use = 1; |
964 | ret = new_len; | |
965 | priv->dp_out_buf_len = 0; | |
966 | } | |
967 | ||
968 | /* return length of new data written, or error */ | |
c6d61269 AC |
969 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
970 | if (ret < 0) | |
22a416c4 | 971 | dev_err_console(port, |
194343d9 | 972 | "%s: usb_submit_urb failed, ret=%d, port=%d\n", |
441b62c1 | 973 | __func__, ret, priv->dp_port_num); |
f9dfbebb | 974 | dev_dbg(&port->dev, "digi_write: returning %d\n", ret); |
c6d61269 | 975 | return ret; |
1da177e4 | 976 | |
41ad427d | 977 | } |
1da177e4 | 978 | |
c6d61269 | 979 | static void digi_write_bulk_callback(struct urb *urb) |
1da177e4 LT |
980 | { |
981 | ||
cdc97792 | 982 | struct usb_serial_port *port = urb->context; |
1da177e4 LT |
983 | struct usb_serial *serial; |
984 | struct digi_port *priv; | |
985 | struct digi_serial *serial_priv; | |
986 | int ret = 0; | |
85d75107 | 987 | int status = urb->status; |
1da177e4 | 988 | |
1da177e4 | 989 | /* port and serial sanity check */ |
41ad427d | 990 | if (port == NULL || (priv = usb_get_serial_port_data(port)) == NULL) { |
109f34e7 | 991 | pr_err("%s: port or port->private is NULL, status=%d\n", |
194343d9 | 992 | __func__, status); |
1da177e4 LT |
993 | return; |
994 | } | |
995 | serial = port->serial; | |
41ad427d | 996 | if (serial == NULL || (serial_priv = usb_get_serial_data(serial)) == NULL) { |
194343d9 GKH |
997 | dev_err(&port->dev, |
998 | "%s: serial or serial->private is NULL, status=%d\n", | |
999 | __func__, status); | |
1da177e4 LT |
1000 | return; |
1001 | } | |
1002 | ||
1003 | /* handle oob callback */ | |
c6d61269 | 1004 | if (priv->dp_port_num == serial_priv->ds_oob_port_num) { |
f9dfbebb | 1005 | dev_dbg(&port->dev, "digi_write_bulk_callback: oob callback\n"); |
c6d61269 | 1006 | spin_lock(&priv->dp_port_lock); |
1da177e4 | 1007 | priv->dp_write_urb_in_use = 0; |
c6d61269 AC |
1008 | wake_up_interruptible(&port->write_wait); |
1009 | spin_unlock(&priv->dp_port_lock); | |
1da177e4 LT |
1010 | return; |
1011 | } | |
1012 | ||
1f87158e | 1013 | /* try to send any buffered data on this port */ |
c6d61269 | 1014 | spin_lock(&priv->dp_port_lock); |
1da177e4 | 1015 | priv->dp_write_urb_in_use = 0; |
1f87158e | 1016 | if (priv->dp_out_buf_len > 0) { |
1da177e4 LT |
1017 | *((unsigned char *)(port->write_urb->transfer_buffer)) |
1018 | = (unsigned char)DIGI_CMD_SEND_DATA; | |
41ad427d | 1019 | *((unsigned char *)(port->write_urb->transfer_buffer) + 1) |
1da177e4 | 1020 | = (unsigned char)priv->dp_out_buf_len; |
41ad427d AC |
1021 | port->write_urb->transfer_buffer_length = |
1022 | priv->dp_out_buf_len + 2; | |
41ad427d | 1023 | memcpy(port->write_urb->transfer_buffer + 2, priv->dp_out_buf, |
c6d61269 | 1024 | priv->dp_out_buf_len); |
41ad427d AC |
1025 | ret = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
1026 | if (ret == 0) { | |
1da177e4 LT |
1027 | priv->dp_write_urb_in_use = 1; |
1028 | priv->dp_out_buf_len = 0; | |
1029 | } | |
1da177e4 | 1030 | } |
1da177e4 | 1031 | /* wake up processes sleeping on writes immediately */ |
6aad04f2 | 1032 | tty_port_tty_wakeup(&port->port); |
1da177e4 LT |
1033 | /* also queue up a wakeup at scheduler time, in case we */ |
1034 | /* lost the race in write_chan(). */ | |
1035 | schedule_work(&priv->dp_wakeup_work); | |
1036 | ||
c6d61269 | 1037 | spin_unlock(&priv->dp_port_lock); |
1f87158e | 1038 | if (ret && ret != -EPERM) |
22a416c4 | 1039 | dev_err_console(port, |
194343d9 | 1040 | "%s: usb_submit_urb failed, ret=%d, port=%d\n", |
441b62c1 | 1041 | __func__, ret, priv->dp_port_num); |
1da177e4 LT |
1042 | } |
1043 | ||
95da310e | 1044 | static int digi_write_room(struct tty_struct *tty) |
1da177e4 | 1045 | { |
95da310e | 1046 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 1047 | struct digi_port *priv = usb_get_serial_port_data(port); |
95da310e | 1048 | int room; |
1da177e4 LT |
1049 | unsigned long flags = 0; |
1050 | ||
c6d61269 | 1051 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 | 1052 | |
50de36f7 | 1053 | if (priv->dp_write_urb_in_use) |
1da177e4 LT |
1054 | room = 0; |
1055 | else | |
1056 | room = port->bulk_out_size - 2 - priv->dp_out_buf_len; | |
1057 | ||
c6d61269 | 1058 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
f9dfbebb | 1059 | dev_dbg(&port->dev, "digi_write_room: port=%d, room=%d\n", priv->dp_port_num, room); |
c6d61269 | 1060 | return room; |
1da177e4 LT |
1061 | |
1062 | } | |
1063 | ||
95da310e | 1064 | static int digi_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 1065 | { |
95da310e | 1066 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
1067 | struct digi_port *priv = usb_get_serial_port_data(port); |
1068 | ||
50de36f7 | 1069 | if (priv->dp_write_urb_in_use) { |
f9dfbebb | 1070 | dev_dbg(&port->dev, "digi_chars_in_buffer: port=%d, chars=%d\n", |
c6d61269 AC |
1071 | priv->dp_port_num, port->bulk_out_size - 2); |
1072 | /* return(port->bulk_out_size - 2); */ | |
1073 | return 256; | |
1da177e4 | 1074 | } else { |
f9dfbebb | 1075 | dev_dbg(&port->dev, "digi_chars_in_buffer: port=%d, chars=%d\n", |
c6d61269 AC |
1076 | priv->dp_port_num, priv->dp_out_buf_len); |
1077 | return priv->dp_out_buf_len; | |
1da177e4 LT |
1078 | } |
1079 | ||
1080 | } | |
1081 | ||
335f8514 AC |
1082 | static void digi_dtr_rts(struct usb_serial_port *port, int on) |
1083 | { | |
1084 | /* Adjust DTR and RTS */ | |
1085 | digi_set_modem_signals(port, on * (TIOCM_DTR|TIOCM_RTS), 1); | |
1086 | } | |
1087 | ||
a509a7e4 | 1088 | static int digi_open(struct tty_struct *tty, struct usb_serial_port *port) |
1da177e4 | 1089 | { |
1da177e4 LT |
1090 | int ret; |
1091 | unsigned char buf[32]; | |
1092 | struct digi_port *priv = usb_get_serial_port_data(port); | |
606d099c | 1093 | struct ktermios not_termios; |
1da177e4 | 1094 | |
1da177e4 | 1095 | /* be sure the device is started up */ |
c6d61269 AC |
1096 | if (digi_startup_device(port->serial) != 0) |
1097 | return -ENXIO; | |
1da177e4 | 1098 | |
1da177e4 LT |
1099 | /* read modem signals automatically whenever they change */ |
1100 | buf[0] = DIGI_CMD_READ_INPUT_SIGNALS; | |
1101 | buf[1] = priv->dp_port_num; | |
1102 | buf[2] = DIGI_ENABLE; | |
1103 | buf[3] = 0; | |
1104 | ||
1105 | /* flush fifos */ | |
1106 | buf[4] = DIGI_CMD_IFLUSH_FIFO; | |
1107 | buf[5] = priv->dp_port_num; | |
1108 | buf[6] = DIGI_FLUSH_TX | DIGI_FLUSH_RX; | |
1109 | buf[7] = 0; | |
1110 | ||
41ad427d AC |
1111 | ret = digi_write_oob_command(port, buf, 8, 1); |
1112 | if (ret != 0) | |
f9dfbebb | 1113 | dev_dbg(&port->dev, "digi_open: write oob failed, ret=%d\n", ret); |
1da177e4 LT |
1114 | |
1115 | /* set termios settings */ | |
95da310e | 1116 | if (tty) { |
adc8d746 AC |
1117 | not_termios.c_cflag = ~tty->termios.c_cflag; |
1118 | not_termios.c_iflag = ~tty->termios.c_iflag; | |
95da310e AC |
1119 | digi_set_termios(tty, port, ¬_termios); |
1120 | } | |
c6d61269 | 1121 | return 0; |
1da177e4 LT |
1122 | } |
1123 | ||
1124 | ||
335f8514 | 1125 | static void digi_close(struct usb_serial_port *port) |
1da177e4 LT |
1126 | { |
1127 | DEFINE_WAIT(wait); | |
1128 | int ret; | |
1129 | unsigned char buf[32]; | |
1da177e4 | 1130 | struct digi_port *priv = usb_get_serial_port_data(port); |
1da177e4 | 1131 | |
0915f490 | 1132 | mutex_lock(&port->serial->disc_mutex); |
1da177e4 | 1133 | /* if disconnected, just clear flags */ |
0915f490 | 1134 | if (port->serial->disconnected) |
1da177e4 LT |
1135 | goto exit; |
1136 | ||
28e679ae JH |
1137 | /* FIXME: Transmit idle belongs in the wait_unti_sent path */ |
1138 | digi_transmit_idle(port, DIGI_CLOSE_TIMEOUT); | |
1139 | ||
1140 | /* disable input flow control */ | |
1141 | buf[0] = DIGI_CMD_SET_INPUT_FLOW_CONTROL; | |
1142 | buf[1] = priv->dp_port_num; | |
1143 | buf[2] = DIGI_DISABLE; | |
1144 | buf[3] = 0; | |
1145 | ||
1146 | /* disable output flow control */ | |
1147 | buf[4] = DIGI_CMD_SET_OUTPUT_FLOW_CONTROL; | |
1148 | buf[5] = priv->dp_port_num; | |
1149 | buf[6] = DIGI_DISABLE; | |
1150 | buf[7] = 0; | |
1151 | ||
1152 | /* disable reading modem signals automatically */ | |
1153 | buf[8] = DIGI_CMD_READ_INPUT_SIGNALS; | |
1154 | buf[9] = priv->dp_port_num; | |
1155 | buf[10] = DIGI_DISABLE; | |
1156 | buf[11] = 0; | |
1157 | ||
1158 | /* disable receive */ | |
1159 | buf[12] = DIGI_CMD_RECEIVE_ENABLE; | |
1160 | buf[13] = priv->dp_port_num; | |
1161 | buf[14] = DIGI_DISABLE; | |
1162 | buf[15] = 0; | |
1163 | ||
1164 | /* flush fifos */ | |
1165 | buf[16] = DIGI_CMD_IFLUSH_FIFO; | |
1166 | buf[17] = priv->dp_port_num; | |
1167 | buf[18] = DIGI_FLUSH_TX | DIGI_FLUSH_RX; | |
1168 | buf[19] = 0; | |
1169 | ||
1170 | ret = digi_write_oob_command(port, buf, 20, 0); | |
1171 | if (ret != 0) | |
1172 | dev_dbg(&port->dev, "digi_close: write oob failed, ret=%d\n", | |
1173 | ret); | |
1174 | /* wait for final commands on oob port to complete */ | |
1175 | prepare_to_wait(&priv->dp_flush_wait, &wait, | |
1176 | TASK_INTERRUPTIBLE); | |
1177 | schedule_timeout(DIGI_CLOSE_TIMEOUT); | |
1178 | finish_wait(&priv->dp_flush_wait, &wait); | |
1179 | ||
1180 | /* shutdown any outstanding bulk writes */ | |
1181 | usb_kill_urb(port->write_urb); | |
1da177e4 | 1182 | exit: |
0915f490 | 1183 | spin_lock_irq(&priv->dp_port_lock); |
1da177e4 | 1184 | priv->dp_write_urb_in_use = 0; |
c6d61269 | 1185 | wake_up_interruptible(&priv->dp_close_wait); |
0915f490 ON |
1186 | spin_unlock_irq(&priv->dp_port_lock); |
1187 | mutex_unlock(&port->serial->disc_mutex); | |
1da177e4 LT |
1188 | } |
1189 | ||
1190 | ||
1191 | /* | |
41ad427d AC |
1192 | * Digi Startup Device |
1193 | * | |
1194 | * Starts reads on all ports. Must be called AFTER startup, with | |
1195 | * urbs initialized. Returns 0 if successful, non-zero error otherwise. | |
1196 | */ | |
1da177e4 | 1197 | |
c6d61269 | 1198 | static int digi_startup_device(struct usb_serial *serial) |
1da177e4 | 1199 | { |
41ad427d | 1200 | int i, ret = 0; |
1da177e4 LT |
1201 | struct digi_serial *serial_priv = usb_get_serial_data(serial); |
1202 | struct usb_serial_port *port; | |
1203 | ||
1da177e4 | 1204 | /* be sure this happens exactly once */ |
c6d61269 AC |
1205 | spin_lock(&serial_priv->ds_serial_lock); |
1206 | if (serial_priv->ds_device_started) { | |
1207 | spin_unlock(&serial_priv->ds_serial_lock); | |
1208 | return 0; | |
1da177e4 LT |
1209 | } |
1210 | serial_priv->ds_device_started = 1; | |
c6d61269 | 1211 | spin_unlock(&serial_priv->ds_serial_lock); |
1da177e4 LT |
1212 | |
1213 | /* start reading from each bulk in endpoint for the device */ | |
1214 | /* set USB_DISABLE_SPD flag for write bulk urbs */ | |
c6d61269 | 1215 | for (i = 0; i < serial->type->num_ports + 1; i++) { |
1da177e4 | 1216 | port = serial->port[i]; |
41ad427d AC |
1217 | ret = usb_submit_urb(port->read_urb, GFP_KERNEL); |
1218 | if (ret != 0) { | |
194343d9 GKH |
1219 | dev_err(&port->dev, |
1220 | "%s: usb_submit_urb failed, ret=%d, port=%d\n", | |
1221 | __func__, ret, i); | |
1da177e4 LT |
1222 | break; |
1223 | } | |
1da177e4 | 1224 | } |
c6d61269 | 1225 | return ret; |
1da177e4 LT |
1226 | } |
1227 | ||
fb44ff85 | 1228 | static int digi_port_init(struct usb_serial_port *port, unsigned port_num) |
1da177e4 | 1229 | { |
1da177e4 | 1230 | struct digi_port *priv; |
1da177e4 | 1231 | |
fb44ff85 JH |
1232 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
1233 | if (!priv) | |
1234 | return -ENOMEM; | |
1da177e4 | 1235 | |
fb44ff85 JH |
1236 | spin_lock_init(&priv->dp_port_lock); |
1237 | priv->dp_port_num = port_num; | |
fb44ff85 JH |
1238 | init_waitqueue_head(&priv->dp_transmit_idle_wait); |
1239 | init_waitqueue_head(&priv->dp_flush_wait); | |
1240 | init_waitqueue_head(&priv->dp_close_wait); | |
1241 | INIT_WORK(&priv->dp_wakeup_work, digi_wakeup_write_lock); | |
1242 | priv->dp_port = port; | |
1da177e4 | 1243 | |
fb44ff85 JH |
1244 | init_waitqueue_head(&port->write_wait); |
1245 | ||
1246 | usb_set_serial_port_data(port, priv); | |
1247 | ||
1248 | return 0; | |
1249 | } | |
1250 | ||
1251 | static int digi_startup(struct usb_serial *serial) | |
1252 | { | |
5a07975a | 1253 | struct device *dev = &serial->interface->dev; |
fb44ff85 JH |
1254 | struct digi_serial *serial_priv; |
1255 | int ret; | |
5a07975a ON |
1256 | int i; |
1257 | ||
1258 | /* check whether the device has the expected number of endpoints */ | |
1259 | if (serial->num_port_pointers < serial->type->num_ports + 1) { | |
1260 | dev_err(dev, "OOB endpoints missing\n"); | |
1261 | return -ENODEV; | |
1262 | } | |
1263 | ||
1264 | for (i = 0; i < serial->type->num_ports + 1 ; i++) { | |
1265 | if (!serial->port[i]->read_urb) { | |
1266 | dev_err(dev, "bulk-in endpoint missing\n"); | |
1267 | return -ENODEV; | |
1268 | } | |
1269 | if (!serial->port[i]->write_urb) { | |
1270 | dev_err(dev, "bulk-out endpoint missing\n"); | |
1271 | return -ENODEV; | |
1272 | } | |
1273 | } | |
fb44ff85 JH |
1274 | |
1275 | serial_priv = kzalloc(sizeof(*serial_priv), GFP_KERNEL); | |
1276 | if (!serial_priv) | |
1277 | return -ENOMEM; | |
1da177e4 | 1278 | |
c6d61269 | 1279 | spin_lock_init(&serial_priv->ds_serial_lock); |
1da177e4 LT |
1280 | serial_priv->ds_oob_port_num = serial->type->num_ports; |
1281 | serial_priv->ds_oob_port = serial->port[serial_priv->ds_oob_port_num]; | |
fb44ff85 JH |
1282 | |
1283 | ret = digi_port_init(serial_priv->ds_oob_port, | |
1284 | serial_priv->ds_oob_port_num); | |
1285 | if (ret) { | |
1286 | kfree(serial_priv); | |
1287 | return ret; | |
1288 | } | |
1289 | ||
1da177e4 LT |
1290 | usb_set_serial_data(serial, serial_priv); |
1291 | ||
c6d61269 | 1292 | return 0; |
1da177e4 LT |
1293 | } |
1294 | ||
1295 | ||
f9c99bb8 | 1296 | static void digi_disconnect(struct usb_serial *serial) |
1da177e4 | 1297 | { |
1da177e4 | 1298 | int i; |
1da177e4 LT |
1299 | |
1300 | /* stop reads and writes on all ports */ | |
c6d61269 | 1301 | for (i = 0; i < serial->type->num_ports + 1; i++) { |
1da177e4 LT |
1302 | usb_kill_urb(serial->port[i]->read_urb); |
1303 | usb_kill_urb(serial->port[i]->write_urb); | |
1304 | } | |
f9c99bb8 AS |
1305 | } |
1306 | ||
1307 | ||
1308 | static void digi_release(struct usb_serial *serial) | |
1309 | { | |
fb44ff85 JH |
1310 | struct digi_serial *serial_priv; |
1311 | struct digi_port *priv; | |
1312 | ||
1313 | serial_priv = usb_get_serial_data(serial); | |
1314 | ||
1315 | priv = usb_get_serial_port_data(serial_priv->ds_oob_port); | |
1316 | kfree(priv); | |
1da177e4 | 1317 | |
fb44ff85 | 1318 | kfree(serial_priv); |
1da177e4 LT |
1319 | } |
1320 | ||
fb44ff85 JH |
1321 | static int digi_port_probe(struct usb_serial_port *port) |
1322 | { | |
1143832e | 1323 | return digi_port_init(port, port->port_number); |
fb44ff85 JH |
1324 | } |
1325 | ||
1326 | static int digi_port_remove(struct usb_serial_port *port) | |
1327 | { | |
1328 | struct digi_port *priv; | |
1329 | ||
1330 | priv = usb_get_serial_port_data(port); | |
1331 | kfree(priv); | |
1332 | ||
1333 | return 0; | |
1334 | } | |
1da177e4 | 1335 | |
c6d61269 | 1336 | static void digi_read_bulk_callback(struct urb *urb) |
1da177e4 | 1337 | { |
cdc97792 | 1338 | struct usb_serial_port *port = urb->context; |
1da177e4 LT |
1339 | struct digi_port *priv; |
1340 | struct digi_serial *serial_priv; | |
1341 | int ret; | |
85d75107 | 1342 | int status = urb->status; |
1da177e4 | 1343 | |
1da177e4 | 1344 | /* port sanity check, do not resubmit if port is not valid */ |
194343d9 GKH |
1345 | if (port == NULL) |
1346 | return; | |
1347 | priv = usb_get_serial_port_data(port); | |
1348 | if (priv == NULL) { | |
1349 | dev_err(&port->dev, "%s: port->private is NULL, status=%d\n", | |
1350 | __func__, status); | |
1da177e4 LT |
1351 | return; |
1352 | } | |
c6d61269 | 1353 | if (port->serial == NULL || |
41ad427d | 1354 | (serial_priv = usb_get_serial_data(port->serial)) == NULL) { |
194343d9 GKH |
1355 | dev_err(&port->dev, "%s: serial is bad or serial->private " |
1356 | "is NULL, status=%d\n", __func__, status); | |
1da177e4 LT |
1357 | return; |
1358 | } | |
1359 | ||
1360 | /* do not resubmit urb if it has any status error */ | |
85d75107 | 1361 | if (status) { |
194343d9 GKH |
1362 | dev_err(&port->dev, |
1363 | "%s: nonzero read bulk status: status=%d, port=%d\n", | |
1364 | __func__, status, priv->dp_port_num); | |
1da177e4 LT |
1365 | return; |
1366 | } | |
1367 | ||
1368 | /* handle oob or inb callback, do not resubmit if error */ | |
c6d61269 AC |
1369 | if (priv->dp_port_num == serial_priv->ds_oob_port_num) { |
1370 | if (digi_read_oob_callback(urb) != 0) | |
1da177e4 LT |
1371 | return; |
1372 | } else { | |
c6d61269 | 1373 | if (digi_read_inb_callback(urb) != 0) |
1da177e4 LT |
1374 | return; |
1375 | } | |
1376 | ||
1377 | /* continue read */ | |
41ad427d | 1378 | ret = usb_submit_urb(urb, GFP_ATOMIC); |
1f87158e | 1379 | if (ret != 0 && ret != -EPERM) { |
194343d9 GKH |
1380 | dev_err(&port->dev, |
1381 | "%s: failed resubmitting urb, ret=%d, port=%d\n", | |
1382 | __func__, ret, priv->dp_port_num); | |
1da177e4 LT |
1383 | } |
1384 | ||
1385 | } | |
1386 | ||
41ad427d AC |
1387 | /* |
1388 | * Digi Read INB Callback | |
1389 | * | |
1390 | * Digi Read INB Callback handles reads on the in band ports, sending | |
1391 | * the data on to the tty subsystem. When called we know port and | |
1392 | * port->private are not NULL and port->serial has been validated. | |
1393 | * It returns 0 if successful, 1 if successful but the port is | |
1394 | * throttled, and -1 if the sanity checks failed. | |
1395 | */ | |
1da177e4 | 1396 | |
c6d61269 | 1397 | static int digi_read_inb_callback(struct urb *urb) |
1da177e4 | 1398 | { |
cdc97792 | 1399 | struct usb_serial_port *port = urb->context; |
1da177e4 LT |
1400 | struct digi_port *priv = usb_get_serial_port_data(port); |
1401 | int opcode = ((unsigned char *)urb->transfer_buffer)[0]; | |
1402 | int len = ((unsigned char *)urb->transfer_buffer)[1]; | |
85d75107 | 1403 | int port_status = ((unsigned char *)urb->transfer_buffer)[2]; |
41ad427d AC |
1404 | unsigned char *data = ((unsigned char *)urb->transfer_buffer) + 3; |
1405 | int flag, throttled; | |
85d75107 | 1406 | int status = urb->status; |
1da177e4 LT |
1407 | |
1408 | /* do not process callbacks on closed ports */ | |
1409 | /* but do continue the read chain */ | |
1f87158e | 1410 | if (urb->status == -ENOENT) |
c6d61269 | 1411 | return 0; |
1da177e4 LT |
1412 | |
1413 | /* short/multiple packet check */ | |
c6d61269 | 1414 | if (urb->actual_length != len + 2) { |
194343d9 | 1415 | dev_err(&port->dev, "%s: INCOMPLETE OR MULTIPLE PACKET, " |
50de36f7 | 1416 | "status=%d, port=%d, opcode=%d, len=%d, " |
194343d9 GKH |
1417 | "actual_length=%d, status=%d\n", __func__, status, |
1418 | priv->dp_port_num, opcode, len, urb->actual_length, | |
1419 | port_status); | |
c6d61269 | 1420 | return -1; |
1da177e4 LT |
1421 | } |
1422 | ||
c6d61269 | 1423 | spin_lock(&priv->dp_port_lock); |
1da177e4 LT |
1424 | |
1425 | /* check for throttle; if set, do not resubmit read urb */ | |
1426 | /* indicate the read chain needs to be restarted on unthrottle */ | |
1427 | throttled = priv->dp_throttled; | |
c6d61269 | 1428 | if (throttled) |
1da177e4 LT |
1429 | priv->dp_throttle_restart = 1; |
1430 | ||
1431 | /* receive data */ | |
2e124b4a | 1432 | if (opcode == DIGI_CMD_RECEIVE_DATA) { |
85d75107 | 1433 | /* get flag from port_status */ |
1da177e4 LT |
1434 | flag = 0; |
1435 | ||
1436 | /* overrun is special, not associated with a char */ | |
c6d61269 | 1437 | if (port_status & DIGI_OVERRUN_ERROR) |
92a19f9c | 1438 | tty_insert_flip_char(&port->port, 0, TTY_OVERRUN); |
1da177e4 LT |
1439 | |
1440 | /* break takes precedence over parity, */ | |
1441 | /* which takes precedence over framing errors */ | |
c6d61269 | 1442 | if (port_status & DIGI_BREAK_ERROR) |
1da177e4 | 1443 | flag = TTY_BREAK; |
c6d61269 | 1444 | else if (port_status & DIGI_PARITY_ERROR) |
1da177e4 | 1445 | flag = TTY_PARITY; |
c6d61269 | 1446 | else if (port_status & DIGI_FRAMING_ERROR) |
1da177e4 | 1447 | flag = TTY_FRAME; |
1da177e4 | 1448 | |
85d75107 | 1449 | /* data length is len-1 (one byte of len is port_status) */ |
1da177e4 | 1450 | --len; |
c6d61269 | 1451 | if (len > 0) { |
2f693357 JS |
1452 | tty_insert_flip_string_fixed_flag(&port->port, data, |
1453 | flag, len); | |
2e124b4a | 1454 | tty_flip_buffer_push(&port->port); |
1da177e4 | 1455 | } |
1da177e4 | 1456 | } |
c6d61269 | 1457 | spin_unlock(&priv->dp_port_lock); |
1da177e4 | 1458 | |
c6d61269 | 1459 | if (opcode == DIGI_CMD_RECEIVE_DISABLE) |
f9dfbebb | 1460 | dev_dbg(&port->dev, "%s: got RECEIVE_DISABLE\n", __func__); |
c6d61269 | 1461 | else if (opcode != DIGI_CMD_RECEIVE_DATA) |
f9dfbebb | 1462 | dev_dbg(&port->dev, "%s: unknown opcode: %d\n", __func__, opcode); |
1da177e4 | 1463 | |
41ad427d | 1464 | return throttled ? 1 : 0; |
1da177e4 LT |
1465 | |
1466 | } | |
1467 | ||
1468 | ||
41ad427d AC |
1469 | /* |
1470 | * Digi Read OOB Callback | |
1471 | * | |
1472 | * Digi Read OOB Callback handles reads on the out of band port. | |
1473 | * When called we know port and port->private are not NULL and | |
1474 | * the port->serial is valid. It returns 0 if successful, and | |
1475 | * -1 if the sanity checks failed. | |
1476 | */ | |
1da177e4 | 1477 | |
c6d61269 | 1478 | static int digi_read_oob_callback(struct urb *urb) |
1da177e4 LT |
1479 | { |
1480 | ||
cdc97792 | 1481 | struct usb_serial_port *port = urb->context; |
1da177e4 | 1482 | struct usb_serial *serial = port->serial; |
4a90f09b | 1483 | struct tty_struct *tty; |
1da177e4 | 1484 | struct digi_port *priv = usb_get_serial_port_data(port); |
91c01886 | 1485 | unsigned char *buf = urb->transfer_buffer; |
1da177e4 LT |
1486 | int opcode, line, status, val; |
1487 | int i; | |
41ad427d | 1488 | unsigned int rts; |
1da177e4 | 1489 | |
91c01886 JH |
1490 | if (urb->actual_length < 4) |
1491 | return -1; | |
1492 | ||
1da177e4 | 1493 | /* handle each oob command */ |
23fc0ba4 | 1494 | for (i = 0; i < urb->actual_length - 3; i += 4) { |
91c01886 JH |
1495 | opcode = buf[i]; |
1496 | line = buf[i + 1]; | |
1497 | status = buf[i + 2]; | |
1498 | val = buf[i + 3]; | |
1da177e4 | 1499 | |
f9dfbebb | 1500 | dev_dbg(&port->dev, "digi_read_oob_callback: opcode=%d, line=%d, status=%d, val=%d\n", |
c6d61269 | 1501 | opcode, line, status, val); |
1da177e4 | 1502 | |
c6d61269 | 1503 | if (status != 0 || line >= serial->type->num_ports) |
1da177e4 LT |
1504 | continue; |
1505 | ||
1506 | port = serial->port[line]; | |
1507 | ||
41ad427d AC |
1508 | priv = usb_get_serial_port_data(port); |
1509 | if (priv == NULL) | |
1da177e4 LT |
1510 | return -1; |
1511 | ||
4a90f09b | 1512 | tty = tty_port_tty_get(&port->port); |
4287341d | 1513 | |
41ad427d | 1514 | rts = 0; |
4287341d | 1515 | if (tty) |
9db276f8 PH |
1516 | rts = C_CRTSCTS(tty); |
1517 | ||
4287341d | 1518 | if (tty && opcode == DIGI_CMD_READ_INPUT_SIGNALS) { |
c6d61269 | 1519 | spin_lock(&priv->dp_port_lock); |
1da177e4 | 1520 | /* convert from digi flags to termiox flags */ |
c6d61269 | 1521 | if (val & DIGI_READ_INPUT_SIGNALS_CTS) { |
1da177e4 LT |
1522 | priv->dp_modem_signals |= TIOCM_CTS; |
1523 | /* port must be open to use tty struct */ | |
d95e3cae | 1524 | if (rts) |
6aad04f2 | 1525 | tty_port_tty_wakeup(&port->port); |
1da177e4 LT |
1526 | } else { |
1527 | priv->dp_modem_signals &= ~TIOCM_CTS; | |
1528 | /* port must be open to use tty struct */ | |
1da177e4 | 1529 | } |
c6d61269 | 1530 | if (val & DIGI_READ_INPUT_SIGNALS_DSR) |
1da177e4 LT |
1531 | priv->dp_modem_signals |= TIOCM_DSR; |
1532 | else | |
1533 | priv->dp_modem_signals &= ~TIOCM_DSR; | |
c6d61269 | 1534 | if (val & DIGI_READ_INPUT_SIGNALS_RI) |
1da177e4 LT |
1535 | priv->dp_modem_signals |= TIOCM_RI; |
1536 | else | |
1537 | priv->dp_modem_signals &= ~TIOCM_RI; | |
c6d61269 | 1538 | if (val & DIGI_READ_INPUT_SIGNALS_DCD) |
1da177e4 LT |
1539 | priv->dp_modem_signals |= TIOCM_CD; |
1540 | else | |
1541 | priv->dp_modem_signals &= ~TIOCM_CD; | |
1542 | ||
c6d61269 AC |
1543 | spin_unlock(&priv->dp_port_lock); |
1544 | } else if (opcode == DIGI_CMD_TRANSMIT_IDLE) { | |
1545 | spin_lock(&priv->dp_port_lock); | |
1da177e4 | 1546 | priv->dp_transmit_idle = 1; |
c6d61269 AC |
1547 | wake_up_interruptible(&priv->dp_transmit_idle_wait); |
1548 | spin_unlock(&priv->dp_port_lock); | |
1549 | } else if (opcode == DIGI_CMD_IFLUSH_FIFO) { | |
1550 | wake_up_interruptible(&priv->dp_flush_wait); | |
1da177e4 | 1551 | } |
4a90f09b | 1552 | tty_kref_put(tty); |
1da177e4 | 1553 | } |
c6d61269 | 1554 | return 0; |
1da177e4 LT |
1555 | |
1556 | } | |
1557 | ||
68e24113 | 1558 | module_usb_serial_driver(serial_drivers, id_table_combined); |
1da177e4 | 1559 | |
c6d61269 AC |
1560 | MODULE_AUTHOR(DRIVER_AUTHOR); |
1561 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 | 1562 | MODULE_LICENSE("GPL"); |