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5fd54ace | 1 | // SPDX-License-Identifier: GPL-2.0+ |
1da177e4 LT |
2 | /* |
3 | * Digi AccelePort USB-4 and USB-2 Serial Converters | |
4 | * | |
5 | * Copyright 2000 by Digi International | |
6 | * | |
1da177e4 LT |
7 | * Shamelessly based on Brian Warner's keyspan_pda.c and Greg Kroah-Hartman's |
8 | * usb-serial driver. | |
9 | * | |
10 | * Peter Berger (pberger@brimson.com) | |
11 | * Al Borchers (borchers@steinerpoint.com) | |
1da177e4 LT |
12 | */ |
13 | ||
1da177e4 LT |
14 | #include <linux/kernel.h> |
15 | #include <linux/errno.h> | |
1da177e4 LT |
16 | #include <linux/slab.h> |
17 | #include <linux/tty.h> | |
18 | #include <linux/tty_driver.h> | |
19 | #include <linux/tty_flip.h> | |
20 | #include <linux/module.h> | |
21 | #include <linux/spinlock.h> | |
41ad427d | 22 | #include <linux/uaccess.h> |
1da177e4 LT |
23 | #include <linux/usb.h> |
24 | #include <linux/wait.h> | |
174cd4b1 | 25 | #include <linux/sched/signal.h> |
a969888c | 26 | #include <linux/usb/serial.h> |
1da177e4 LT |
27 | |
28 | /* Defines */ | |
29 | ||
1da177e4 LT |
30 | #define DRIVER_AUTHOR "Peter Berger <pberger@brimson.com>, Al Borchers <borchers@steinerpoint.com>" |
31 | #define DRIVER_DESC "Digi AccelePort USB-2/USB-4 Serial Converter driver" | |
32 | ||
33 | /* port output buffer length -- must be <= transfer buffer length - 2 */ | |
34 | /* so we can be sure to send the full buffer in one urb */ | |
35 | #define DIGI_OUT_BUF_SIZE 8 | |
36 | ||
37 | /* port input buffer length -- must be >= transfer buffer length - 3 */ | |
38 | /* so we can be sure to hold at least one full buffer from one urb */ | |
39 | #define DIGI_IN_BUF_SIZE 64 | |
40 | ||
41 | /* retry timeout while sleeping */ | |
42 | #define DIGI_RETRY_TIMEOUT (HZ/10) | |
43 | ||
44 | /* timeout while waiting for tty output to drain in close */ | |
45 | /* this delay is used twice in close, so the total delay could */ | |
46 | /* be twice this value */ | |
47 | #define DIGI_CLOSE_TIMEOUT (5*HZ) | |
48 | ||
49 | ||
50 | /* AccelePort USB Defines */ | |
51 | ||
52 | /* ids */ | |
53 | #define DIGI_VENDOR_ID 0x05c5 | |
54 | #define DIGI_2_ID 0x0002 /* USB-2 */ | |
55 | #define DIGI_4_ID 0x0004 /* USB-4 */ | |
56 | ||
57 | /* commands | |
58 | * "INB": can be used on the in-band endpoint | |
59 | * "OOB": can be used on the out-of-band endpoint | |
60 | */ | |
61 | #define DIGI_CMD_SET_BAUD_RATE 0 /* INB, OOB */ | |
62 | #define DIGI_CMD_SET_WORD_SIZE 1 /* INB, OOB */ | |
63 | #define DIGI_CMD_SET_PARITY 2 /* INB, OOB */ | |
64 | #define DIGI_CMD_SET_STOP_BITS 3 /* INB, OOB */ | |
65 | #define DIGI_CMD_SET_INPUT_FLOW_CONTROL 4 /* INB, OOB */ | |
66 | #define DIGI_CMD_SET_OUTPUT_FLOW_CONTROL 5 /* INB, OOB */ | |
67 | #define DIGI_CMD_SET_DTR_SIGNAL 6 /* INB, OOB */ | |
68 | #define DIGI_CMD_SET_RTS_SIGNAL 7 /* INB, OOB */ | |
69 | #define DIGI_CMD_READ_INPUT_SIGNALS 8 /* OOB */ | |
70 | #define DIGI_CMD_IFLUSH_FIFO 9 /* OOB */ | |
71 | #define DIGI_CMD_RECEIVE_ENABLE 10 /* INB, OOB */ | |
72 | #define DIGI_CMD_BREAK_CONTROL 11 /* INB, OOB */ | |
73 | #define DIGI_CMD_LOCAL_LOOPBACK 12 /* INB, OOB */ | |
74 | #define DIGI_CMD_TRANSMIT_IDLE 13 /* INB, OOB */ | |
75 | #define DIGI_CMD_READ_UART_REGISTER 14 /* OOB */ | |
76 | #define DIGI_CMD_WRITE_UART_REGISTER 15 /* INB, OOB */ | |
77 | #define DIGI_CMD_AND_UART_REGISTER 16 /* INB, OOB */ | |
78 | #define DIGI_CMD_OR_UART_REGISTER 17 /* INB, OOB */ | |
79 | #define DIGI_CMD_SEND_DATA 18 /* INB */ | |
80 | #define DIGI_CMD_RECEIVE_DATA 19 /* INB */ | |
81 | #define DIGI_CMD_RECEIVE_DISABLE 20 /* INB */ | |
82 | #define DIGI_CMD_GET_PORT_TYPE 21 /* OOB */ | |
83 | ||
84 | /* baud rates */ | |
85 | #define DIGI_BAUD_50 0 | |
86 | #define DIGI_BAUD_75 1 | |
87 | #define DIGI_BAUD_110 2 | |
88 | #define DIGI_BAUD_150 3 | |
89 | #define DIGI_BAUD_200 4 | |
90 | #define DIGI_BAUD_300 5 | |
91 | #define DIGI_BAUD_600 6 | |
92 | #define DIGI_BAUD_1200 7 | |
93 | #define DIGI_BAUD_1800 8 | |
94 | #define DIGI_BAUD_2400 9 | |
95 | #define DIGI_BAUD_4800 10 | |
96 | #define DIGI_BAUD_7200 11 | |
97 | #define DIGI_BAUD_9600 12 | |
98 | #define DIGI_BAUD_14400 13 | |
99 | #define DIGI_BAUD_19200 14 | |
100 | #define DIGI_BAUD_28800 15 | |
101 | #define DIGI_BAUD_38400 16 | |
102 | #define DIGI_BAUD_57600 17 | |
103 | #define DIGI_BAUD_76800 18 | |
104 | #define DIGI_BAUD_115200 19 | |
105 | #define DIGI_BAUD_153600 20 | |
106 | #define DIGI_BAUD_230400 21 | |
107 | #define DIGI_BAUD_460800 22 | |
108 | ||
109 | /* arguments */ | |
110 | #define DIGI_WORD_SIZE_5 0 | |
111 | #define DIGI_WORD_SIZE_6 1 | |
112 | #define DIGI_WORD_SIZE_7 2 | |
113 | #define DIGI_WORD_SIZE_8 3 | |
114 | ||
115 | #define DIGI_PARITY_NONE 0 | |
116 | #define DIGI_PARITY_ODD 1 | |
117 | #define DIGI_PARITY_EVEN 2 | |
118 | #define DIGI_PARITY_MARK 3 | |
119 | #define DIGI_PARITY_SPACE 4 | |
120 | ||
121 | #define DIGI_STOP_BITS_1 0 | |
122 | #define DIGI_STOP_BITS_2 1 | |
123 | ||
124 | #define DIGI_INPUT_FLOW_CONTROL_XON_XOFF 1 | |
125 | #define DIGI_INPUT_FLOW_CONTROL_RTS 2 | |
126 | #define DIGI_INPUT_FLOW_CONTROL_DTR 4 | |
127 | ||
128 | #define DIGI_OUTPUT_FLOW_CONTROL_XON_XOFF 1 | |
129 | #define DIGI_OUTPUT_FLOW_CONTROL_CTS 2 | |
130 | #define DIGI_OUTPUT_FLOW_CONTROL_DSR 4 | |
131 | ||
132 | #define DIGI_DTR_INACTIVE 0 | |
133 | #define DIGI_DTR_ACTIVE 1 | |
134 | #define DIGI_DTR_INPUT_FLOW_CONTROL 2 | |
135 | ||
136 | #define DIGI_RTS_INACTIVE 0 | |
137 | #define DIGI_RTS_ACTIVE 1 | |
138 | #define DIGI_RTS_INPUT_FLOW_CONTROL 2 | |
139 | #define DIGI_RTS_TOGGLE 3 | |
140 | ||
141 | #define DIGI_FLUSH_TX 1 | |
142 | #define DIGI_FLUSH_RX 2 | |
143 | #define DIGI_RESUME_TX 4 /* clears xoff condition */ | |
144 | ||
145 | #define DIGI_TRANSMIT_NOT_IDLE 0 | |
146 | #define DIGI_TRANSMIT_IDLE 1 | |
147 | ||
148 | #define DIGI_DISABLE 0 | |
149 | #define DIGI_ENABLE 1 | |
150 | ||
151 | #define DIGI_DEASSERT 0 | |
152 | #define DIGI_ASSERT 1 | |
153 | ||
154 | /* in band status codes */ | |
155 | #define DIGI_OVERRUN_ERROR 4 | |
156 | #define DIGI_PARITY_ERROR 8 | |
157 | #define DIGI_FRAMING_ERROR 16 | |
158 | #define DIGI_BREAK_ERROR 32 | |
159 | ||
160 | /* out of band status */ | |
161 | #define DIGI_NO_ERROR 0 | |
162 | #define DIGI_BAD_FIRST_PARAMETER 1 | |
163 | #define DIGI_BAD_SECOND_PARAMETER 2 | |
164 | #define DIGI_INVALID_LINE 3 | |
165 | #define DIGI_INVALID_OPCODE 4 | |
166 | ||
167 | /* input signals */ | |
168 | #define DIGI_READ_INPUT_SIGNALS_SLOT 1 | |
169 | #define DIGI_READ_INPUT_SIGNALS_ERR 2 | |
170 | #define DIGI_READ_INPUT_SIGNALS_BUSY 4 | |
171 | #define DIGI_READ_INPUT_SIGNALS_PE 8 | |
172 | #define DIGI_READ_INPUT_SIGNALS_CTS 16 | |
173 | #define DIGI_READ_INPUT_SIGNALS_DSR 32 | |
174 | #define DIGI_READ_INPUT_SIGNALS_RI 64 | |
175 | #define DIGI_READ_INPUT_SIGNALS_DCD 128 | |
176 | ||
177 | ||
178 | /* Structures */ | |
179 | ||
180 | struct digi_serial { | |
181 | spinlock_t ds_serial_lock; | |
182 | struct usb_serial_port *ds_oob_port; /* out-of-band port */ | |
183 | int ds_oob_port_num; /* index of out-of-band port */ | |
184 | int ds_device_started; | |
185 | }; | |
186 | ||
187 | struct digi_port { | |
188 | spinlock_t dp_port_lock; | |
189 | int dp_port_num; | |
190 | int dp_out_buf_len; | |
191 | unsigned char dp_out_buf[DIGI_OUT_BUF_SIZE]; | |
1da177e4 LT |
192 | int dp_write_urb_in_use; |
193 | unsigned int dp_modem_signals; | |
1da177e4 LT |
194 | int dp_transmit_idle; |
195 | wait_queue_head_t dp_transmit_idle_wait; | |
196 | int dp_throttled; | |
197 | int dp_throttle_restart; | |
198 | wait_queue_head_t dp_flush_wait; | |
1da177e4 | 199 | wait_queue_head_t dp_close_wait; /* wait queue for close */ |
c4028958 | 200 | struct usb_serial_port *dp_port; |
1da177e4 LT |
201 | }; |
202 | ||
203 | ||
204 | /* Local Function Declarations */ | |
205 | ||
c6d61269 AC |
206 | static int digi_write_oob_command(struct usb_serial_port *port, |
207 | unsigned char *buf, int count, int interruptible); | |
208 | static int digi_write_inb_command(struct usb_serial_port *port, | |
209 | unsigned char *buf, int count, unsigned long timeout); | |
210 | static int digi_set_modem_signals(struct usb_serial_port *port, | |
211 | unsigned int modem_signals, int interruptible); | |
212 | static int digi_transmit_idle(struct usb_serial_port *port, | |
213 | unsigned long timeout); | |
41ad427d AC |
214 | static void digi_rx_throttle(struct tty_struct *tty); |
215 | static void digi_rx_unthrottle(struct tty_struct *tty); | |
95da310e AC |
216 | static void digi_set_termios(struct tty_struct *tty, |
217 | struct usb_serial_port *port, struct ktermios *old_termios); | |
218 | static void digi_break_ctl(struct tty_struct *tty, int break_state); | |
60b33c13 | 219 | static int digi_tiocmget(struct tty_struct *tty); |
20b9d177 AC |
220 | static int digi_tiocmset(struct tty_struct *tty, unsigned int set, |
221 | unsigned int clear); | |
95da310e | 222 | static int digi_write(struct tty_struct *tty, struct usb_serial_port *port, |
20b9d177 | 223 | const unsigned char *buf, int count); |
c6d61269 | 224 | static void digi_write_bulk_callback(struct urb *urb); |
95da310e AC |
225 | static int digi_write_room(struct tty_struct *tty); |
226 | static int digi_chars_in_buffer(struct tty_struct *tty); | |
a509a7e4 | 227 | static int digi_open(struct tty_struct *tty, struct usb_serial_port *port); |
335f8514 | 228 | static void digi_close(struct usb_serial_port *port); |
335f8514 | 229 | static void digi_dtr_rts(struct usb_serial_port *port, int on); |
c6d61269 AC |
230 | static int digi_startup_device(struct usb_serial *serial); |
231 | static int digi_startup(struct usb_serial *serial); | |
f9c99bb8 AS |
232 | static void digi_disconnect(struct usb_serial *serial); |
233 | static void digi_release(struct usb_serial *serial); | |
fb44ff85 JH |
234 | static int digi_port_probe(struct usb_serial_port *port); |
235 | static int digi_port_remove(struct usb_serial_port *port); | |
c6d61269 AC |
236 | static void digi_read_bulk_callback(struct urb *urb); |
237 | static int digi_read_inb_callback(struct urb *urb); | |
238 | static int digi_read_oob_callback(struct urb *urb); | |
1da177e4 LT |
239 | |
240 | ||
7d40d7e8 | 241 | static const struct usb_device_id id_table_combined[] = { |
1da177e4 LT |
242 | { USB_DEVICE(DIGI_VENDOR_ID, DIGI_2_ID) }, |
243 | { USB_DEVICE(DIGI_VENDOR_ID, DIGI_4_ID) }, | |
244 | { } /* Terminating entry */ | |
245 | }; | |
246 | ||
7d40d7e8 | 247 | static const struct usb_device_id id_table_2[] = { |
1da177e4 LT |
248 | { USB_DEVICE(DIGI_VENDOR_ID, DIGI_2_ID) }, |
249 | { } /* Terminating entry */ | |
250 | }; | |
251 | ||
7d40d7e8 | 252 | static const struct usb_device_id id_table_4[] = { |
1da177e4 LT |
253 | { USB_DEVICE(DIGI_VENDOR_ID, DIGI_4_ID) }, |
254 | { } /* Terminating entry */ | |
255 | }; | |
256 | ||
41ad427d | 257 | MODULE_DEVICE_TABLE(usb, id_table_combined); |
1da177e4 | 258 | |
1da177e4 LT |
259 | /* device info needed for the Digi serial converter */ |
260 | ||
ea65370d | 261 | static struct usb_serial_driver digi_acceleport_2_device = { |
18fcac35 | 262 | .driver = { |
269bda1c GKH |
263 | .owner = THIS_MODULE, |
264 | .name = "digi_2", | |
18fcac35 | 265 | }, |
269bda1c | 266 | .description = "Digi 2 port USB adapter", |
1da177e4 | 267 | .id_table = id_table_2, |
1da177e4 | 268 | .num_ports = 3, |
e7d6507e JH |
269 | .num_bulk_in = 4, |
270 | .num_bulk_out = 4, | |
1da177e4 LT |
271 | .open = digi_open, |
272 | .close = digi_close, | |
335f8514 | 273 | .dtr_rts = digi_dtr_rts, |
1da177e4 LT |
274 | .write = digi_write, |
275 | .write_room = digi_write_room, | |
276 | .write_bulk_callback = digi_write_bulk_callback, | |
277 | .read_bulk_callback = digi_read_bulk_callback, | |
278 | .chars_in_buffer = digi_chars_in_buffer, | |
279 | .throttle = digi_rx_throttle, | |
280 | .unthrottle = digi_rx_unthrottle, | |
1da177e4 LT |
281 | .set_termios = digi_set_termios, |
282 | .break_ctl = digi_break_ctl, | |
283 | .tiocmget = digi_tiocmget, | |
284 | .tiocmset = digi_tiocmset, | |
285 | .attach = digi_startup, | |
f9c99bb8 AS |
286 | .disconnect = digi_disconnect, |
287 | .release = digi_release, | |
fb44ff85 JH |
288 | .port_probe = digi_port_probe, |
289 | .port_remove = digi_port_remove, | |
1da177e4 LT |
290 | }; |
291 | ||
ea65370d | 292 | static struct usb_serial_driver digi_acceleport_4_device = { |
18fcac35 | 293 | .driver = { |
269bda1c GKH |
294 | .owner = THIS_MODULE, |
295 | .name = "digi_4", | |
18fcac35 | 296 | }, |
269bda1c | 297 | .description = "Digi 4 port USB adapter", |
1da177e4 | 298 | .id_table = id_table_4, |
1da177e4 | 299 | .num_ports = 4, |
e7d6507e JH |
300 | .num_bulk_in = 5, |
301 | .num_bulk_out = 5, | |
1da177e4 LT |
302 | .open = digi_open, |
303 | .close = digi_close, | |
304 | .write = digi_write, | |
305 | .write_room = digi_write_room, | |
306 | .write_bulk_callback = digi_write_bulk_callback, | |
307 | .read_bulk_callback = digi_read_bulk_callback, | |
308 | .chars_in_buffer = digi_chars_in_buffer, | |
309 | .throttle = digi_rx_throttle, | |
310 | .unthrottle = digi_rx_unthrottle, | |
1da177e4 LT |
311 | .set_termios = digi_set_termios, |
312 | .break_ctl = digi_break_ctl, | |
313 | .tiocmget = digi_tiocmget, | |
314 | .tiocmset = digi_tiocmset, | |
315 | .attach = digi_startup, | |
f9c99bb8 AS |
316 | .disconnect = digi_disconnect, |
317 | .release = digi_release, | |
fb44ff85 JH |
318 | .port_probe = digi_port_probe, |
319 | .port_remove = digi_port_remove, | |
1da177e4 LT |
320 | }; |
321 | ||
97b6b6d2 AS |
322 | static struct usb_serial_driver * const serial_drivers[] = { |
323 | &digi_acceleport_2_device, &digi_acceleport_4_device, NULL | |
324 | }; | |
1da177e4 LT |
325 | |
326 | /* Functions */ | |
327 | ||
328 | /* | |
41ad427d AC |
329 | * Cond Wait Interruptible Timeout Irqrestore |
330 | * | |
331 | * Do spin_unlock_irqrestore and interruptible_sleep_on_timeout | |
332 | * so that wake ups are not lost if they occur between the unlock | |
333 | * and the sleep. In other words, spin_unlock_irqrestore and | |
334 | * interruptible_sleep_on_timeout are "atomic" with respect to | |
335 | * wake ups. This is used to implement condition variables. | |
336 | * | |
337 | * interruptible_sleep_on_timeout is deprecated and has been replaced | |
338 | * with the equivalent code. | |
339 | */ | |
1da177e4 | 340 | |
c6d61269 | 341 | static long cond_wait_interruptible_timeout_irqrestore( |
1da177e4 | 342 | wait_queue_head_t *q, long timeout, |
c6d61269 | 343 | spinlock_t *lock, unsigned long flags) |
5a33956a | 344 | __releases(lock) |
1da177e4 LT |
345 | { |
346 | DEFINE_WAIT(wait); | |
347 | ||
45f23f18 | 348 | prepare_to_wait(q, &wait, TASK_INTERRUPTIBLE); |
1da177e4 LT |
349 | spin_unlock_irqrestore(lock, flags); |
350 | timeout = schedule_timeout(timeout); | |
351 | finish_wait(q, &wait); | |
352 | ||
353 | return timeout; | |
1da177e4 LT |
354 | } |
355 | ||
1da177e4 | 356 | /* |
41ad427d AC |
357 | * Digi Write OOB Command |
358 | * | |
359 | * Write commands on the out of band port. Commands are 4 | |
360 | * bytes each, multiple commands can be sent at once, and | |
361 | * no command will be split across USB packets. Returns 0 | |
362 | * if successful, -EINTR if interrupted while sleeping and | |
363 | * the interruptible flag is true, or a negative error | |
364 | * returned by usb_submit_urb. | |
365 | */ | |
1da177e4 | 366 | |
c6d61269 AC |
367 | static int digi_write_oob_command(struct usb_serial_port *port, |
368 | unsigned char *buf, int count, int interruptible) | |
1da177e4 | 369 | { |
1da177e4 LT |
370 | int ret = 0; |
371 | int len; | |
372 | struct usb_serial_port *oob_port = (struct usb_serial_port *)((struct digi_serial *)(usb_get_serial_data(port->serial)))->ds_oob_port; | |
373 | struct digi_port *oob_priv = usb_get_serial_port_data(oob_port); | |
374 | unsigned long flags = 0; | |
375 | ||
f9dfbebb GKH |
376 | dev_dbg(&port->dev, |
377 | "digi_write_oob_command: TOP: port=%d, count=%d\n", | |
378 | oob_priv->dp_port_num, count); | |
1da177e4 | 379 | |
c6d61269 | 380 | spin_lock_irqsave(&oob_priv->dp_port_lock, flags); |
41ad427d | 381 | while (count > 0) { |
50de36f7 | 382 | while (oob_priv->dp_write_urb_in_use) { |
1da177e4 LT |
383 | cond_wait_interruptible_timeout_irqrestore( |
384 | &oob_port->write_wait, DIGI_RETRY_TIMEOUT, | |
c6d61269 AC |
385 | &oob_priv->dp_port_lock, flags); |
386 | if (interruptible && signal_pending(current)) | |
387 | return -EINTR; | |
388 | spin_lock_irqsave(&oob_priv->dp_port_lock, flags); | |
1da177e4 LT |
389 | } |
390 | ||
391 | /* len must be a multiple of 4, so commands are not split */ | |
c6d61269 AC |
392 | len = min(count, oob_port->bulk_out_size); |
393 | if (len > 4) | |
1da177e4 | 394 | len &= ~3; |
c6d61269 | 395 | memcpy(oob_port->write_urb->transfer_buffer, buf, len); |
1da177e4 | 396 | oob_port->write_urb->transfer_buffer_length = len; |
41ad427d AC |
397 | ret = usb_submit_urb(oob_port->write_urb, GFP_ATOMIC); |
398 | if (ret == 0) { | |
1da177e4 LT |
399 | oob_priv->dp_write_urb_in_use = 1; |
400 | count -= len; | |
401 | buf += len; | |
402 | } | |
1da177e4 | 403 | } |
c6d61269 AC |
404 | spin_unlock_irqrestore(&oob_priv->dp_port_lock, flags); |
405 | if (ret) | |
194343d9 GKH |
406 | dev_err(&port->dev, "%s: usb_submit_urb failed, ret=%d\n", |
407 | __func__, ret); | |
c6d61269 | 408 | return ret; |
1da177e4 LT |
409 | |
410 | } | |
411 | ||
412 | ||
413 | /* | |
41ad427d AC |
414 | * Digi Write In Band Command |
415 | * | |
416 | * Write commands on the given port. Commands are 4 | |
417 | * bytes each, multiple commands can be sent at once, and | |
418 | * no command will be split across USB packets. If timeout | |
419 | * is non-zero, write in band command will return after | |
420 | * waiting unsuccessfully for the URB status to clear for | |
421 | * timeout ticks. Returns 0 if successful, or a negative | |
422 | * error returned by digi_write. | |
423 | */ | |
1da177e4 | 424 | |
c6d61269 AC |
425 | static int digi_write_inb_command(struct usb_serial_port *port, |
426 | unsigned char *buf, int count, unsigned long timeout) | |
1da177e4 | 427 | { |
1da177e4 LT |
428 | int ret = 0; |
429 | int len; | |
430 | struct digi_port *priv = usb_get_serial_port_data(port); | |
431 | unsigned char *data = port->write_urb->transfer_buffer; | |
432 | unsigned long flags = 0; | |
433 | ||
f9dfbebb | 434 | dev_dbg(&port->dev, "digi_write_inb_command: TOP: port=%d, count=%d\n", |
c6d61269 | 435 | priv->dp_port_num, count); |
1da177e4 | 436 | |
c6d61269 | 437 | if (timeout) |
1da177e4 LT |
438 | timeout += jiffies; |
439 | else | |
440 | timeout = ULONG_MAX; | |
441 | ||
c6d61269 | 442 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
41ad427d | 443 | while (count > 0 && ret == 0) { |
50de36f7 GKH |
444 | while (priv->dp_write_urb_in_use && |
445 | time_before(jiffies, timeout)) { | |
1da177e4 LT |
446 | cond_wait_interruptible_timeout_irqrestore( |
447 | &port->write_wait, DIGI_RETRY_TIMEOUT, | |
c6d61269 AC |
448 | &priv->dp_port_lock, flags); |
449 | if (signal_pending(current)) | |
450 | return -EINTR; | |
451 | spin_lock_irqsave(&priv->dp_port_lock, flags); | |
1da177e4 LT |
452 | } |
453 | ||
454 | /* len must be a multiple of 4 and small enough to */ | |
455 | /* guarantee the write will send buffered data first, */ | |
456 | /* so commands are in order with data and not split */ | |
c6d61269 AC |
457 | len = min(count, port->bulk_out_size-2-priv->dp_out_buf_len); |
458 | if (len > 4) | |
1da177e4 LT |
459 | len &= ~3; |
460 | ||
461 | /* write any buffered data first */ | |
c6d61269 | 462 | if (priv->dp_out_buf_len > 0) { |
1da177e4 LT |
463 | data[0] = DIGI_CMD_SEND_DATA; |
464 | data[1] = priv->dp_out_buf_len; | |
c6d61269 AC |
465 | memcpy(data + 2, priv->dp_out_buf, |
466 | priv->dp_out_buf_len); | |
467 | memcpy(data + 2 + priv->dp_out_buf_len, buf, len); | |
1da177e4 | 468 | port->write_urb->transfer_buffer_length |
c6d61269 | 469 | = priv->dp_out_buf_len + 2 + len; |
1da177e4 | 470 | } else { |
c6d61269 | 471 | memcpy(data, buf, len); |
1da177e4 LT |
472 | port->write_urb->transfer_buffer_length = len; |
473 | } | |
1da177e4 | 474 | |
41ad427d AC |
475 | ret = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
476 | if (ret == 0) { | |
1da177e4 LT |
477 | priv->dp_write_urb_in_use = 1; |
478 | priv->dp_out_buf_len = 0; | |
479 | count -= len; | |
480 | buf += len; | |
481 | } | |
482 | ||
483 | } | |
c6d61269 | 484 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
1da177e4 | 485 | |
c6d61269 | 486 | if (ret) |
194343d9 GKH |
487 | dev_err(&port->dev, |
488 | "%s: usb_submit_urb failed, ret=%d, port=%d\n", | |
441b62c1 | 489 | __func__, ret, priv->dp_port_num); |
c6d61269 | 490 | return ret; |
1da177e4 LT |
491 | } |
492 | ||
493 | ||
494 | /* | |
41ad427d AC |
495 | * Digi Set Modem Signals |
496 | * | |
497 | * Sets or clears DTR and RTS on the port, according to the | |
498 | * modem_signals argument. Use TIOCM_DTR and TIOCM_RTS flags | |
499 | * for the modem_signals argument. Returns 0 if successful, | |
500 | * -EINTR if interrupted while sleeping, or a non-zero error | |
501 | * returned by usb_submit_urb. | |
502 | */ | |
1da177e4 | 503 | |
c6d61269 AC |
504 | static int digi_set_modem_signals(struct usb_serial_port *port, |
505 | unsigned int modem_signals, int interruptible) | |
1da177e4 LT |
506 | { |
507 | ||
508 | int ret; | |
509 | struct digi_port *port_priv = usb_get_serial_port_data(port); | |
41ad427d | 510 | struct usb_serial_port *oob_port = (struct usb_serial_port *) ((struct digi_serial *)(usb_get_serial_data(port->serial)))->ds_oob_port; |
1da177e4 LT |
511 | struct digi_port *oob_priv = usb_get_serial_port_data(oob_port); |
512 | unsigned char *data = oob_port->write_urb->transfer_buffer; | |
513 | unsigned long flags = 0; | |
514 | ||
515 | ||
f9dfbebb GKH |
516 | dev_dbg(&port->dev, |
517 | "digi_set_modem_signals: TOP: port=%d, modem_signals=0x%x\n", | |
c6d61269 | 518 | port_priv->dp_port_num, modem_signals); |
1da177e4 | 519 | |
c6d61269 AC |
520 | spin_lock_irqsave(&oob_priv->dp_port_lock, flags); |
521 | spin_lock(&port_priv->dp_port_lock); | |
1da177e4 | 522 | |
50de36f7 | 523 | while (oob_priv->dp_write_urb_in_use) { |
c6d61269 | 524 | spin_unlock(&port_priv->dp_port_lock); |
1da177e4 LT |
525 | cond_wait_interruptible_timeout_irqrestore( |
526 | &oob_port->write_wait, DIGI_RETRY_TIMEOUT, | |
c6d61269 AC |
527 | &oob_priv->dp_port_lock, flags); |
528 | if (interruptible && signal_pending(current)) | |
529 | return -EINTR; | |
530 | spin_lock_irqsave(&oob_priv->dp_port_lock, flags); | |
531 | spin_lock(&port_priv->dp_port_lock); | |
1da177e4 | 532 | } |
1da177e4 LT |
533 | data[0] = DIGI_CMD_SET_DTR_SIGNAL; |
534 | data[1] = port_priv->dp_port_num; | |
41ad427d AC |
535 | data[2] = (modem_signals & TIOCM_DTR) ? |
536 | DIGI_DTR_ACTIVE : DIGI_DTR_INACTIVE; | |
1da177e4 | 537 | data[3] = 0; |
1da177e4 LT |
538 | data[4] = DIGI_CMD_SET_RTS_SIGNAL; |
539 | data[5] = port_priv->dp_port_num; | |
41ad427d AC |
540 | data[6] = (modem_signals & TIOCM_RTS) ? |
541 | DIGI_RTS_ACTIVE : DIGI_RTS_INACTIVE; | |
1da177e4 LT |
542 | data[7] = 0; |
543 | ||
544 | oob_port->write_urb->transfer_buffer_length = 8; | |
1da177e4 | 545 | |
41ad427d AC |
546 | ret = usb_submit_urb(oob_port->write_urb, GFP_ATOMIC); |
547 | if (ret == 0) { | |
1da177e4 | 548 | oob_priv->dp_write_urb_in_use = 1; |
a7f9f290 JH |
549 | port_priv->dp_modem_signals &= ~(TIOCM_DTR | TIOCM_RTS); |
550 | port_priv->dp_modem_signals |= | |
551 | modem_signals & (TIOCM_DTR | TIOCM_RTS); | |
1da177e4 | 552 | } |
c6d61269 AC |
553 | spin_unlock(&port_priv->dp_port_lock); |
554 | spin_unlock_irqrestore(&oob_priv->dp_port_lock, flags); | |
555 | if (ret) | |
194343d9 GKH |
556 | dev_err(&port->dev, "%s: usb_submit_urb failed, ret=%d\n", |
557 | __func__, ret); | |
c6d61269 | 558 | return ret; |
1da177e4 LT |
559 | } |
560 | ||
1da177e4 | 561 | /* |
41ad427d AC |
562 | * Digi Transmit Idle |
563 | * | |
564 | * Digi transmit idle waits, up to timeout ticks, for the transmitter | |
565 | * to go idle. It returns 0 if successful or a negative error. | |
566 | * | |
567 | * There are race conditions here if more than one process is calling | |
568 | * digi_transmit_idle on the same port at the same time. However, this | |
569 | * is only called from close, and only one process can be in close on a | |
570 | * port at a time, so its ok. | |
571 | */ | |
1da177e4 | 572 | |
c6d61269 AC |
573 | static int digi_transmit_idle(struct usb_serial_port *port, |
574 | unsigned long timeout) | |
1da177e4 | 575 | { |
1da177e4 LT |
576 | int ret; |
577 | unsigned char buf[2]; | |
578 | struct digi_port *priv = usb_get_serial_port_data(port); | |
579 | unsigned long flags = 0; | |
580 | ||
c6d61269 | 581 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 | 582 | priv->dp_transmit_idle = 0; |
c6d61269 | 583 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
1da177e4 LT |
584 | |
585 | buf[0] = DIGI_CMD_TRANSMIT_IDLE; | |
586 | buf[1] = 0; | |
587 | ||
588 | timeout += jiffies; | |
589 | ||
41ad427d AC |
590 | ret = digi_write_inb_command(port, buf, 2, timeout - jiffies); |
591 | if (ret != 0) | |
c6d61269 | 592 | return ret; |
1da177e4 | 593 | |
c6d61269 | 594 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 | 595 | |
41ad427d | 596 | while (time_before(jiffies, timeout) && !priv->dp_transmit_idle) { |
1da177e4 LT |
597 | cond_wait_interruptible_timeout_irqrestore( |
598 | &priv->dp_transmit_idle_wait, DIGI_RETRY_TIMEOUT, | |
c6d61269 AC |
599 | &priv->dp_port_lock, flags); |
600 | if (signal_pending(current)) | |
601 | return -EINTR; | |
602 | spin_lock_irqsave(&priv->dp_port_lock, flags); | |
1da177e4 | 603 | } |
1da177e4 | 604 | priv->dp_transmit_idle = 0; |
c6d61269 AC |
605 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
606 | return 0; | |
1da177e4 LT |
607 | |
608 | } | |
609 | ||
610 | ||
95da310e | 611 | static void digi_rx_throttle(struct tty_struct *tty) |
1da177e4 | 612 | { |
1da177e4 | 613 | unsigned long flags; |
95da310e | 614 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
615 | struct digi_port *priv = usb_get_serial_port_data(port); |
616 | ||
1da177e4 | 617 | /* stop receiving characters by not resubmitting the read urb */ |
c6d61269 | 618 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 LT |
619 | priv->dp_throttled = 1; |
620 | priv->dp_throttle_restart = 0; | |
c6d61269 | 621 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
1da177e4 LT |
622 | } |
623 | ||
624 | ||
95da310e | 625 | static void digi_rx_unthrottle(struct tty_struct *tty) |
1da177e4 | 626 | { |
1da177e4 | 627 | int ret = 0; |
1da177e4 | 628 | unsigned long flags; |
95da310e | 629 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 630 | struct digi_port *priv = usb_get_serial_port_data(port); |
1da177e4 | 631 | |
c6d61269 | 632 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 | 633 | |
1da177e4 | 634 | /* restart read chain */ |
5833041f | 635 | if (priv->dp_throttle_restart) |
c6d61269 | 636 | ret = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
1da177e4 | 637 | |
ba6b702f JH |
638 | /* turn throttle off */ |
639 | priv->dp_throttled = 0; | |
640 | priv->dp_throttle_restart = 0; | |
641 | ||
c6d61269 | 642 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
1da177e4 | 643 | |
c6d61269 | 644 | if (ret) |
194343d9 GKH |
645 | dev_err(&port->dev, |
646 | "%s: usb_submit_urb failed, ret=%d, port=%d\n", | |
441b62c1 | 647 | __func__, ret, priv->dp_port_num); |
1da177e4 LT |
648 | } |
649 | ||
650 | ||
41ad427d | 651 | static void digi_set_termios(struct tty_struct *tty, |
95da310e | 652 | struct usb_serial_port *port, struct ktermios *old_termios) |
1da177e4 | 653 | { |
1da177e4 | 654 | struct digi_port *priv = usb_get_serial_port_data(port); |
f9dfbebb | 655 | struct device *dev = &port->dev; |
adc8d746 AC |
656 | unsigned int iflag = tty->termios.c_iflag; |
657 | unsigned int cflag = tty->termios.c_cflag; | |
1da177e4 LT |
658 | unsigned int old_iflag = old_termios->c_iflag; |
659 | unsigned int old_cflag = old_termios->c_cflag; | |
660 | unsigned char buf[32]; | |
661 | unsigned int modem_signals; | |
41ad427d | 662 | int arg, ret; |
1da177e4 | 663 | int i = 0; |
c6d61269 | 664 | speed_t baud; |
1da177e4 | 665 | |
f9dfbebb GKH |
666 | dev_dbg(dev, |
667 | "digi_set_termios: TOP: port=%d, iflag=0x%x, old_iflag=0x%x, cflag=0x%x, old_cflag=0x%x\n", | |
668 | priv->dp_port_num, iflag, old_iflag, cflag, old_cflag); | |
1da177e4 LT |
669 | |
670 | /* set baud rate */ | |
41ad427d AC |
671 | baud = tty_get_baud_rate(tty); |
672 | if (baud != tty_termios_baud_rate(old_termios)) { | |
1da177e4 LT |
673 | arg = -1; |
674 | ||
675 | /* reassert DTR and (maybe) RTS on transition from B0 */ | |
9db276f8 | 676 | if ((old_cflag & CBAUD) == B0) { |
1da177e4 LT |
677 | /* don't set RTS if using hardware flow control */ |
678 | /* and throttling input */ | |
679 | modem_signals = TIOCM_DTR; | |
97ef38b8 | 680 | if (!C_CRTSCTS(tty) || !tty_throttled(tty)) |
1da177e4 | 681 | modem_signals |= TIOCM_RTS; |
c6d61269 | 682 | digi_set_modem_signals(port, modem_signals, 1); |
1da177e4 | 683 | } |
c6d61269 | 684 | switch (baud) { |
41ad427d AC |
685 | /* drop DTR and RTS on transition to B0 */ |
686 | case 0: digi_set_modem_signals(port, 0, 1); break; | |
687 | case 50: arg = DIGI_BAUD_50; break; | |
688 | case 75: arg = DIGI_BAUD_75; break; | |
689 | case 110: arg = DIGI_BAUD_110; break; | |
690 | case 150: arg = DIGI_BAUD_150; break; | |
691 | case 200: arg = DIGI_BAUD_200; break; | |
692 | case 300: arg = DIGI_BAUD_300; break; | |
693 | case 600: arg = DIGI_BAUD_600; break; | |
694 | case 1200: arg = DIGI_BAUD_1200; break; | |
695 | case 1800: arg = DIGI_BAUD_1800; break; | |
696 | case 2400: arg = DIGI_BAUD_2400; break; | |
697 | case 4800: arg = DIGI_BAUD_4800; break; | |
698 | case 9600: arg = DIGI_BAUD_9600; break; | |
699 | case 19200: arg = DIGI_BAUD_19200; break; | |
700 | case 38400: arg = DIGI_BAUD_38400; break; | |
701 | case 57600: arg = DIGI_BAUD_57600; break; | |
702 | case 115200: arg = DIGI_BAUD_115200; break; | |
703 | case 230400: arg = DIGI_BAUD_230400; break; | |
704 | case 460800: arg = DIGI_BAUD_460800; break; | |
705 | default: | |
706 | arg = DIGI_BAUD_9600; | |
707 | baud = 9600; | |
708 | break; | |
1da177e4 | 709 | } |
c6d61269 | 710 | if (arg != -1) { |
1da177e4 LT |
711 | buf[i++] = DIGI_CMD_SET_BAUD_RATE; |
712 | buf[i++] = priv->dp_port_num; | |
713 | buf[i++] = arg; | |
714 | buf[i++] = 0; | |
715 | } | |
1da177e4 | 716 | } |
1da177e4 | 717 | /* set parity */ |
adc8d746 | 718 | tty->termios.c_cflag &= ~CMSPAR; |
7fa36a99 | 719 | |
74d81395 JH |
720 | if ((cflag & (PARENB | PARODD)) != (old_cflag & (PARENB | PARODD))) { |
721 | if (cflag & PARENB) { | |
722 | if (cflag & PARODD) | |
1da177e4 LT |
723 | arg = DIGI_PARITY_ODD; |
724 | else | |
725 | arg = DIGI_PARITY_EVEN; | |
726 | } else { | |
727 | arg = DIGI_PARITY_NONE; | |
728 | } | |
1da177e4 LT |
729 | buf[i++] = DIGI_CMD_SET_PARITY; |
730 | buf[i++] = priv->dp_port_num; | |
731 | buf[i++] = arg; | |
732 | buf[i++] = 0; | |
1da177e4 | 733 | } |
1da177e4 | 734 | /* set word size */ |
74d81395 | 735 | if ((cflag & CSIZE) != (old_cflag & CSIZE)) { |
1da177e4 | 736 | arg = -1; |
74d81395 | 737 | switch (cflag & CSIZE) { |
1da177e4 LT |
738 | case CS5: arg = DIGI_WORD_SIZE_5; break; |
739 | case CS6: arg = DIGI_WORD_SIZE_6; break; | |
740 | case CS7: arg = DIGI_WORD_SIZE_7; break; | |
741 | case CS8: arg = DIGI_WORD_SIZE_8; break; | |
742 | default: | |
f9dfbebb GKH |
743 | dev_dbg(dev, |
744 | "digi_set_termios: can't handle word size %d\n", | |
74d81395 | 745 | cflag & CSIZE); |
1da177e4 LT |
746 | break; |
747 | } | |
748 | ||
c6d61269 | 749 | if (arg != -1) { |
1da177e4 LT |
750 | buf[i++] = DIGI_CMD_SET_WORD_SIZE; |
751 | buf[i++] = priv->dp_port_num; | |
752 | buf[i++] = arg; | |
753 | buf[i++] = 0; | |
754 | } | |
755 | ||
756 | } | |
757 | ||
758 | /* set stop bits */ | |
74d81395 | 759 | if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) { |
1da177e4 | 760 | |
74d81395 | 761 | if ((cflag & CSTOPB)) |
1da177e4 LT |
762 | arg = DIGI_STOP_BITS_2; |
763 | else | |
764 | arg = DIGI_STOP_BITS_1; | |
765 | ||
766 | buf[i++] = DIGI_CMD_SET_STOP_BITS; | |
767 | buf[i++] = priv->dp_port_num; | |
768 | buf[i++] = arg; | |
769 | buf[i++] = 0; | |
770 | ||
771 | } | |
772 | ||
773 | /* set input flow control */ | |
74d81395 JH |
774 | if ((iflag & IXOFF) != (old_iflag & IXOFF) || |
775 | (cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { | |
1da177e4 | 776 | arg = 0; |
74d81395 | 777 | if (iflag & IXOFF) |
1da177e4 LT |
778 | arg |= DIGI_INPUT_FLOW_CONTROL_XON_XOFF; |
779 | else | |
780 | arg &= ~DIGI_INPUT_FLOW_CONTROL_XON_XOFF; | |
781 | ||
74d81395 | 782 | if (cflag & CRTSCTS) { |
1da177e4 LT |
783 | arg |= DIGI_INPUT_FLOW_CONTROL_RTS; |
784 | ||
785 | /* On USB-4 it is necessary to assert RTS prior */ | |
786 | /* to selecting RTS input flow control. */ | |
787 | buf[i++] = DIGI_CMD_SET_RTS_SIGNAL; | |
788 | buf[i++] = priv->dp_port_num; | |
789 | buf[i++] = DIGI_RTS_ACTIVE; | |
790 | buf[i++] = 0; | |
791 | ||
792 | } else { | |
793 | arg &= ~DIGI_INPUT_FLOW_CONTROL_RTS; | |
794 | } | |
1da177e4 LT |
795 | buf[i++] = DIGI_CMD_SET_INPUT_FLOW_CONTROL; |
796 | buf[i++] = priv->dp_port_num; | |
797 | buf[i++] = arg; | |
798 | buf[i++] = 0; | |
1da177e4 LT |
799 | } |
800 | ||
801 | /* set output flow control */ | |
74d81395 JH |
802 | if ((iflag & IXON) != (old_iflag & IXON) || |
803 | (cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { | |
1da177e4 | 804 | arg = 0; |
7fa36a99 | 805 | if (iflag & IXON) |
1da177e4 LT |
806 | arg |= DIGI_OUTPUT_FLOW_CONTROL_XON_XOFF; |
807 | else | |
808 | arg &= ~DIGI_OUTPUT_FLOW_CONTROL_XON_XOFF; | |
809 | ||
74d81395 | 810 | if (cflag & CRTSCTS) |
1da177e4 | 811 | arg |= DIGI_OUTPUT_FLOW_CONTROL_CTS; |
74d81395 | 812 | else |
1da177e4 | 813 | arg &= ~DIGI_OUTPUT_FLOW_CONTROL_CTS; |
1da177e4 LT |
814 | |
815 | buf[i++] = DIGI_CMD_SET_OUTPUT_FLOW_CONTROL; | |
816 | buf[i++] = priv->dp_port_num; | |
817 | buf[i++] = arg; | |
818 | buf[i++] = 0; | |
1da177e4 LT |
819 | } |
820 | ||
821 | /* set receive enable/disable */ | |
7fa36a99 AC |
822 | if ((cflag & CREAD) != (old_cflag & CREAD)) { |
823 | if (cflag & CREAD) | |
1da177e4 LT |
824 | arg = DIGI_ENABLE; |
825 | else | |
826 | arg = DIGI_DISABLE; | |
827 | ||
828 | buf[i++] = DIGI_CMD_RECEIVE_ENABLE; | |
829 | buf[i++] = priv->dp_port_num; | |
830 | buf[i++] = arg; | |
831 | buf[i++] = 0; | |
1da177e4 | 832 | } |
41ad427d AC |
833 | ret = digi_write_oob_command(port, buf, i, 1); |
834 | if (ret != 0) | |
f9dfbebb | 835 | dev_dbg(dev, "digi_set_termios: write oob failed, ret=%d\n", ret); |
7fa36a99 | 836 | tty_encode_baud_rate(tty, baud, baud); |
1da177e4 LT |
837 | } |
838 | ||
839 | ||
95da310e | 840 | static void digi_break_ctl(struct tty_struct *tty, int break_state) |
1da177e4 | 841 | { |
95da310e | 842 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
843 | unsigned char buf[4]; |
844 | ||
1da177e4 LT |
845 | buf[0] = DIGI_CMD_BREAK_CONTROL; |
846 | buf[1] = 2; /* length */ | |
847 | buf[2] = break_state ? 1 : 0; | |
848 | buf[3] = 0; /* pad */ | |
c6d61269 | 849 | digi_write_inb_command(port, buf, 4, 0); |
1da177e4 LT |
850 | } |
851 | ||
852 | ||
60b33c13 | 853 | static int digi_tiocmget(struct tty_struct *tty) |
1da177e4 | 854 | { |
95da310e | 855 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
856 | struct digi_port *priv = usb_get_serial_port_data(port); |
857 | unsigned int val; | |
858 | unsigned long flags; | |
859 | ||
c6d61269 | 860 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 | 861 | val = priv->dp_modem_signals; |
c6d61269 | 862 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
1da177e4 LT |
863 | return val; |
864 | } | |
865 | ||
866 | ||
20b9d177 AC |
867 | static int digi_tiocmset(struct tty_struct *tty, |
868 | unsigned int set, unsigned int clear) | |
1da177e4 | 869 | { |
95da310e | 870 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
871 | struct digi_port *priv = usb_get_serial_port_data(port); |
872 | unsigned int val; | |
873 | unsigned long flags; | |
874 | ||
c6d61269 | 875 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 | 876 | val = (priv->dp_modem_signals & ~clear) | set; |
c6d61269 AC |
877 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
878 | return digi_set_modem_signals(port, val, 1); | |
1da177e4 LT |
879 | } |
880 | ||
881 | ||
95da310e AC |
882 | static int digi_write(struct tty_struct *tty, struct usb_serial_port *port, |
883 | const unsigned char *buf, int count) | |
1da177e4 LT |
884 | { |
885 | ||
41ad427d | 886 | int ret, data_len, new_len; |
1da177e4 LT |
887 | struct digi_port *priv = usb_get_serial_port_data(port); |
888 | unsigned char *data = port->write_urb->transfer_buffer; | |
889 | unsigned long flags = 0; | |
890 | ||
f9dfbebb GKH |
891 | dev_dbg(&port->dev, |
892 | "digi_write: TOP: port=%d, count=%d, in_interrupt=%ld\n", | |
c6d61269 | 893 | priv->dp_port_num, count, in_interrupt()); |
1da177e4 LT |
894 | |
895 | /* copy user data (which can sleep) before getting spin lock */ | |
c6d61269 AC |
896 | count = min(count, port->bulk_out_size-2); |
897 | count = min(64, count); | |
1da177e4 LT |
898 | |
899 | /* be sure only one write proceeds at a time */ | |
900 | /* there are races on the port private buffer */ | |
c6d61269 | 901 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 LT |
902 | |
903 | /* wait for urb status clear to submit another urb */ | |
50de36f7 | 904 | if (priv->dp_write_urb_in_use) { |
1da177e4 | 905 | /* buffer data if count is 1 (probably put_char) if possible */ |
c6d61269 | 906 | if (count == 1 && priv->dp_out_buf_len < DIGI_OUT_BUF_SIZE) { |
1da177e4 LT |
907 | priv->dp_out_buf[priv->dp_out_buf_len++] = *buf; |
908 | new_len = 1; | |
909 | } else { | |
910 | new_len = 0; | |
911 | } | |
c6d61269 AC |
912 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
913 | return new_len; | |
1da177e4 LT |
914 | } |
915 | ||
916 | /* allow space for any buffered data and for new data, up to */ | |
917 | /* transfer buffer size - 2 (for command and length bytes) */ | |
918 | new_len = min(count, port->bulk_out_size-2-priv->dp_out_buf_len); | |
919 | data_len = new_len + priv->dp_out_buf_len; | |
920 | ||
c6d61269 AC |
921 | if (data_len == 0) { |
922 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); | |
923 | return 0; | |
1da177e4 LT |
924 | } |
925 | ||
926 | port->write_urb->transfer_buffer_length = data_len+2; | |
1da177e4 LT |
927 | |
928 | *data++ = DIGI_CMD_SEND_DATA; | |
929 | *data++ = data_len; | |
930 | ||
931 | /* copy in buffered data first */ | |
c6d61269 | 932 | memcpy(data, priv->dp_out_buf, priv->dp_out_buf_len); |
1da177e4 LT |
933 | data += priv->dp_out_buf_len; |
934 | ||
935 | /* copy in new data */ | |
c6d61269 | 936 | memcpy(data, buf, new_len); |
1da177e4 | 937 | |
41ad427d AC |
938 | ret = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
939 | if (ret == 0) { | |
1da177e4 LT |
940 | priv->dp_write_urb_in_use = 1; |
941 | ret = new_len; | |
942 | priv->dp_out_buf_len = 0; | |
943 | } | |
944 | ||
945 | /* return length of new data written, or error */ | |
c6d61269 AC |
946 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
947 | if (ret < 0) | |
22a416c4 | 948 | dev_err_console(port, |
194343d9 | 949 | "%s: usb_submit_urb failed, ret=%d, port=%d\n", |
441b62c1 | 950 | __func__, ret, priv->dp_port_num); |
f9dfbebb | 951 | dev_dbg(&port->dev, "digi_write: returning %d\n", ret); |
c6d61269 | 952 | return ret; |
1da177e4 | 953 | |
41ad427d | 954 | } |
1da177e4 | 955 | |
c6d61269 | 956 | static void digi_write_bulk_callback(struct urb *urb) |
1da177e4 LT |
957 | { |
958 | ||
cdc97792 | 959 | struct usb_serial_port *port = urb->context; |
1da177e4 LT |
960 | struct usb_serial *serial; |
961 | struct digi_port *priv; | |
962 | struct digi_serial *serial_priv; | |
041b7db9 | 963 | unsigned long flags; |
1da177e4 | 964 | int ret = 0; |
85d75107 | 965 | int status = urb->status; |
d7a77e34 | 966 | bool wakeup; |
1da177e4 | 967 | |
1da177e4 | 968 | /* port and serial sanity check */ |
41ad427d | 969 | if (port == NULL || (priv = usb_get_serial_port_data(port)) == NULL) { |
109f34e7 | 970 | pr_err("%s: port or port->private is NULL, status=%d\n", |
194343d9 | 971 | __func__, status); |
1da177e4 LT |
972 | return; |
973 | } | |
974 | serial = port->serial; | |
41ad427d | 975 | if (serial == NULL || (serial_priv = usb_get_serial_data(serial)) == NULL) { |
194343d9 GKH |
976 | dev_err(&port->dev, |
977 | "%s: serial or serial->private is NULL, status=%d\n", | |
978 | __func__, status); | |
1da177e4 LT |
979 | return; |
980 | } | |
981 | ||
982 | /* handle oob callback */ | |
c6d61269 | 983 | if (priv->dp_port_num == serial_priv->ds_oob_port_num) { |
f9dfbebb | 984 | dev_dbg(&port->dev, "digi_write_bulk_callback: oob callback\n"); |
041b7db9 | 985 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 | 986 | priv->dp_write_urb_in_use = 0; |
c6d61269 | 987 | wake_up_interruptible(&port->write_wait); |
041b7db9 | 988 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
1da177e4 LT |
989 | return; |
990 | } | |
991 | ||
1f87158e | 992 | /* try to send any buffered data on this port */ |
d7a77e34 | 993 | wakeup = true; |
041b7db9 | 994 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 | 995 | priv->dp_write_urb_in_use = 0; |
1f87158e | 996 | if (priv->dp_out_buf_len > 0) { |
1da177e4 LT |
997 | *((unsigned char *)(port->write_urb->transfer_buffer)) |
998 | = (unsigned char)DIGI_CMD_SEND_DATA; | |
41ad427d | 999 | *((unsigned char *)(port->write_urb->transfer_buffer) + 1) |
1da177e4 | 1000 | = (unsigned char)priv->dp_out_buf_len; |
41ad427d AC |
1001 | port->write_urb->transfer_buffer_length = |
1002 | priv->dp_out_buf_len + 2; | |
41ad427d | 1003 | memcpy(port->write_urb->transfer_buffer + 2, priv->dp_out_buf, |
c6d61269 | 1004 | priv->dp_out_buf_len); |
41ad427d AC |
1005 | ret = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
1006 | if (ret == 0) { | |
1da177e4 LT |
1007 | priv->dp_write_urb_in_use = 1; |
1008 | priv->dp_out_buf_len = 0; | |
d7a77e34 | 1009 | wakeup = false; |
1da177e4 | 1010 | } |
1da177e4 | 1011 | } |
041b7db9 | 1012 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
d7a77e34 | 1013 | |
1f87158e | 1014 | if (ret && ret != -EPERM) |
22a416c4 | 1015 | dev_err_console(port, |
194343d9 | 1016 | "%s: usb_submit_urb failed, ret=%d, port=%d\n", |
441b62c1 | 1017 | __func__, ret, priv->dp_port_num); |
d7a77e34 JH |
1018 | |
1019 | if (wakeup) | |
1020 | tty_port_tty_wakeup(&port->port); | |
1da177e4 LT |
1021 | } |
1022 | ||
95da310e | 1023 | static int digi_write_room(struct tty_struct *tty) |
1da177e4 | 1024 | { |
95da310e | 1025 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 1026 | struct digi_port *priv = usb_get_serial_port_data(port); |
95da310e | 1027 | int room; |
1da177e4 LT |
1028 | unsigned long flags = 0; |
1029 | ||
c6d61269 | 1030 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 | 1031 | |
50de36f7 | 1032 | if (priv->dp_write_urb_in_use) |
1da177e4 LT |
1033 | room = 0; |
1034 | else | |
1035 | room = port->bulk_out_size - 2 - priv->dp_out_buf_len; | |
1036 | ||
c6d61269 | 1037 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
f9dfbebb | 1038 | dev_dbg(&port->dev, "digi_write_room: port=%d, room=%d\n", priv->dp_port_num, room); |
c6d61269 | 1039 | return room; |
1da177e4 LT |
1040 | |
1041 | } | |
1042 | ||
95da310e | 1043 | static int digi_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 1044 | { |
95da310e | 1045 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
1046 | struct digi_port *priv = usb_get_serial_port_data(port); |
1047 | ||
50de36f7 | 1048 | if (priv->dp_write_urb_in_use) { |
f9dfbebb | 1049 | dev_dbg(&port->dev, "digi_chars_in_buffer: port=%d, chars=%d\n", |
c6d61269 AC |
1050 | priv->dp_port_num, port->bulk_out_size - 2); |
1051 | /* return(port->bulk_out_size - 2); */ | |
1052 | return 256; | |
1da177e4 | 1053 | } else { |
f9dfbebb | 1054 | dev_dbg(&port->dev, "digi_chars_in_buffer: port=%d, chars=%d\n", |
c6d61269 AC |
1055 | priv->dp_port_num, priv->dp_out_buf_len); |
1056 | return priv->dp_out_buf_len; | |
1da177e4 LT |
1057 | } |
1058 | ||
1059 | } | |
1060 | ||
335f8514 AC |
1061 | static void digi_dtr_rts(struct usb_serial_port *port, int on) |
1062 | { | |
1063 | /* Adjust DTR and RTS */ | |
a7f9f290 | 1064 | digi_set_modem_signals(port, on * (TIOCM_DTR | TIOCM_RTS), 1); |
335f8514 AC |
1065 | } |
1066 | ||
a509a7e4 | 1067 | static int digi_open(struct tty_struct *tty, struct usb_serial_port *port) |
1da177e4 | 1068 | { |
1da177e4 LT |
1069 | int ret; |
1070 | unsigned char buf[32]; | |
1071 | struct digi_port *priv = usb_get_serial_port_data(port); | |
606d099c | 1072 | struct ktermios not_termios; |
1da177e4 | 1073 | |
1da177e4 | 1074 | /* be sure the device is started up */ |
c6d61269 AC |
1075 | if (digi_startup_device(port->serial) != 0) |
1076 | return -ENXIO; | |
1da177e4 | 1077 | |
1da177e4 LT |
1078 | /* read modem signals automatically whenever they change */ |
1079 | buf[0] = DIGI_CMD_READ_INPUT_SIGNALS; | |
1080 | buf[1] = priv->dp_port_num; | |
1081 | buf[2] = DIGI_ENABLE; | |
1082 | buf[3] = 0; | |
1083 | ||
1084 | /* flush fifos */ | |
1085 | buf[4] = DIGI_CMD_IFLUSH_FIFO; | |
1086 | buf[5] = priv->dp_port_num; | |
1087 | buf[6] = DIGI_FLUSH_TX | DIGI_FLUSH_RX; | |
1088 | buf[7] = 0; | |
1089 | ||
41ad427d AC |
1090 | ret = digi_write_oob_command(port, buf, 8, 1); |
1091 | if (ret != 0) | |
f9dfbebb | 1092 | dev_dbg(&port->dev, "digi_open: write oob failed, ret=%d\n", ret); |
1da177e4 LT |
1093 | |
1094 | /* set termios settings */ | |
95da310e | 1095 | if (tty) { |
adc8d746 AC |
1096 | not_termios.c_cflag = ~tty->termios.c_cflag; |
1097 | not_termios.c_iflag = ~tty->termios.c_iflag; | |
95da310e AC |
1098 | digi_set_termios(tty, port, ¬_termios); |
1099 | } | |
c6d61269 | 1100 | return 0; |
1da177e4 LT |
1101 | } |
1102 | ||
1103 | ||
335f8514 | 1104 | static void digi_close(struct usb_serial_port *port) |
1da177e4 LT |
1105 | { |
1106 | DEFINE_WAIT(wait); | |
1107 | int ret; | |
1108 | unsigned char buf[32]; | |
1da177e4 | 1109 | struct digi_port *priv = usb_get_serial_port_data(port); |
1da177e4 | 1110 | |
0915f490 | 1111 | mutex_lock(&port->serial->disc_mutex); |
1da177e4 | 1112 | /* if disconnected, just clear flags */ |
0915f490 | 1113 | if (port->serial->disconnected) |
1da177e4 LT |
1114 | goto exit; |
1115 | ||
28e679ae JH |
1116 | /* FIXME: Transmit idle belongs in the wait_unti_sent path */ |
1117 | digi_transmit_idle(port, DIGI_CLOSE_TIMEOUT); | |
1118 | ||
1119 | /* disable input flow control */ | |
1120 | buf[0] = DIGI_CMD_SET_INPUT_FLOW_CONTROL; | |
1121 | buf[1] = priv->dp_port_num; | |
1122 | buf[2] = DIGI_DISABLE; | |
1123 | buf[3] = 0; | |
1124 | ||
1125 | /* disable output flow control */ | |
1126 | buf[4] = DIGI_CMD_SET_OUTPUT_FLOW_CONTROL; | |
1127 | buf[5] = priv->dp_port_num; | |
1128 | buf[6] = DIGI_DISABLE; | |
1129 | buf[7] = 0; | |
1130 | ||
1131 | /* disable reading modem signals automatically */ | |
1132 | buf[8] = DIGI_CMD_READ_INPUT_SIGNALS; | |
1133 | buf[9] = priv->dp_port_num; | |
1134 | buf[10] = DIGI_DISABLE; | |
1135 | buf[11] = 0; | |
1136 | ||
1137 | /* disable receive */ | |
1138 | buf[12] = DIGI_CMD_RECEIVE_ENABLE; | |
1139 | buf[13] = priv->dp_port_num; | |
1140 | buf[14] = DIGI_DISABLE; | |
1141 | buf[15] = 0; | |
1142 | ||
1143 | /* flush fifos */ | |
1144 | buf[16] = DIGI_CMD_IFLUSH_FIFO; | |
1145 | buf[17] = priv->dp_port_num; | |
1146 | buf[18] = DIGI_FLUSH_TX | DIGI_FLUSH_RX; | |
1147 | buf[19] = 0; | |
1148 | ||
1149 | ret = digi_write_oob_command(port, buf, 20, 0); | |
1150 | if (ret != 0) | |
1151 | dev_dbg(&port->dev, "digi_close: write oob failed, ret=%d\n", | |
1152 | ret); | |
1153 | /* wait for final commands on oob port to complete */ | |
1154 | prepare_to_wait(&priv->dp_flush_wait, &wait, | |
1155 | TASK_INTERRUPTIBLE); | |
1156 | schedule_timeout(DIGI_CLOSE_TIMEOUT); | |
1157 | finish_wait(&priv->dp_flush_wait, &wait); | |
1158 | ||
1159 | /* shutdown any outstanding bulk writes */ | |
1160 | usb_kill_urb(port->write_urb); | |
1da177e4 | 1161 | exit: |
0915f490 | 1162 | spin_lock_irq(&priv->dp_port_lock); |
1da177e4 | 1163 | priv->dp_write_urb_in_use = 0; |
c6d61269 | 1164 | wake_up_interruptible(&priv->dp_close_wait); |
0915f490 ON |
1165 | spin_unlock_irq(&priv->dp_port_lock); |
1166 | mutex_unlock(&port->serial->disc_mutex); | |
1da177e4 LT |
1167 | } |
1168 | ||
1169 | ||
1170 | /* | |
41ad427d AC |
1171 | * Digi Startup Device |
1172 | * | |
1173 | * Starts reads on all ports. Must be called AFTER startup, with | |
1174 | * urbs initialized. Returns 0 if successful, non-zero error otherwise. | |
1175 | */ | |
1da177e4 | 1176 | |
c6d61269 | 1177 | static int digi_startup_device(struct usb_serial *serial) |
1da177e4 | 1178 | { |
41ad427d | 1179 | int i, ret = 0; |
1da177e4 LT |
1180 | struct digi_serial *serial_priv = usb_get_serial_data(serial); |
1181 | struct usb_serial_port *port; | |
1182 | ||
1da177e4 | 1183 | /* be sure this happens exactly once */ |
c6d61269 AC |
1184 | spin_lock(&serial_priv->ds_serial_lock); |
1185 | if (serial_priv->ds_device_started) { | |
1186 | spin_unlock(&serial_priv->ds_serial_lock); | |
1187 | return 0; | |
1da177e4 LT |
1188 | } |
1189 | serial_priv->ds_device_started = 1; | |
c6d61269 | 1190 | spin_unlock(&serial_priv->ds_serial_lock); |
1da177e4 LT |
1191 | |
1192 | /* start reading from each bulk in endpoint for the device */ | |
1193 | /* set USB_DISABLE_SPD flag for write bulk urbs */ | |
c6d61269 | 1194 | for (i = 0; i < serial->type->num_ports + 1; i++) { |
1da177e4 | 1195 | port = serial->port[i]; |
41ad427d AC |
1196 | ret = usb_submit_urb(port->read_urb, GFP_KERNEL); |
1197 | if (ret != 0) { | |
194343d9 GKH |
1198 | dev_err(&port->dev, |
1199 | "%s: usb_submit_urb failed, ret=%d, port=%d\n", | |
1200 | __func__, ret, i); | |
1da177e4 LT |
1201 | break; |
1202 | } | |
1da177e4 | 1203 | } |
c6d61269 | 1204 | return ret; |
1da177e4 LT |
1205 | } |
1206 | ||
fb44ff85 | 1207 | static int digi_port_init(struct usb_serial_port *port, unsigned port_num) |
1da177e4 | 1208 | { |
1da177e4 | 1209 | struct digi_port *priv; |
1da177e4 | 1210 | |
fb44ff85 JH |
1211 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
1212 | if (!priv) | |
1213 | return -ENOMEM; | |
1da177e4 | 1214 | |
fb44ff85 JH |
1215 | spin_lock_init(&priv->dp_port_lock); |
1216 | priv->dp_port_num = port_num; | |
fb44ff85 JH |
1217 | init_waitqueue_head(&priv->dp_transmit_idle_wait); |
1218 | init_waitqueue_head(&priv->dp_flush_wait); | |
1219 | init_waitqueue_head(&priv->dp_close_wait); | |
fb44ff85 | 1220 | priv->dp_port = port; |
1da177e4 | 1221 | |
fb44ff85 JH |
1222 | init_waitqueue_head(&port->write_wait); |
1223 | ||
1224 | usb_set_serial_port_data(port, priv); | |
1225 | ||
1226 | return 0; | |
1227 | } | |
1228 | ||
1229 | static int digi_startup(struct usb_serial *serial) | |
1230 | { | |
1231 | struct digi_serial *serial_priv; | |
1232 | int ret; | |
1233 | ||
1234 | serial_priv = kzalloc(sizeof(*serial_priv), GFP_KERNEL); | |
1235 | if (!serial_priv) | |
1236 | return -ENOMEM; | |
1da177e4 | 1237 | |
c6d61269 | 1238 | spin_lock_init(&serial_priv->ds_serial_lock); |
1da177e4 LT |
1239 | serial_priv->ds_oob_port_num = serial->type->num_ports; |
1240 | serial_priv->ds_oob_port = serial->port[serial_priv->ds_oob_port_num]; | |
fb44ff85 JH |
1241 | |
1242 | ret = digi_port_init(serial_priv->ds_oob_port, | |
1243 | serial_priv->ds_oob_port_num); | |
1244 | if (ret) { | |
1245 | kfree(serial_priv); | |
1246 | return ret; | |
1247 | } | |
1248 | ||
1da177e4 LT |
1249 | usb_set_serial_data(serial, serial_priv); |
1250 | ||
c6d61269 | 1251 | return 0; |
1da177e4 LT |
1252 | } |
1253 | ||
1254 | ||
f9c99bb8 | 1255 | static void digi_disconnect(struct usb_serial *serial) |
1da177e4 | 1256 | { |
1da177e4 | 1257 | int i; |
1da177e4 LT |
1258 | |
1259 | /* stop reads and writes on all ports */ | |
c6d61269 | 1260 | for (i = 0; i < serial->type->num_ports + 1; i++) { |
1da177e4 LT |
1261 | usb_kill_urb(serial->port[i]->read_urb); |
1262 | usb_kill_urb(serial->port[i]->write_urb); | |
1263 | } | |
f9c99bb8 AS |
1264 | } |
1265 | ||
1266 | ||
1267 | static void digi_release(struct usb_serial *serial) | |
1268 | { | |
fb44ff85 JH |
1269 | struct digi_serial *serial_priv; |
1270 | struct digi_port *priv; | |
1271 | ||
1272 | serial_priv = usb_get_serial_data(serial); | |
1273 | ||
1274 | priv = usb_get_serial_port_data(serial_priv->ds_oob_port); | |
1275 | kfree(priv); | |
1da177e4 | 1276 | |
fb44ff85 | 1277 | kfree(serial_priv); |
1da177e4 LT |
1278 | } |
1279 | ||
fb44ff85 JH |
1280 | static int digi_port_probe(struct usb_serial_port *port) |
1281 | { | |
1143832e | 1282 | return digi_port_init(port, port->port_number); |
fb44ff85 JH |
1283 | } |
1284 | ||
1285 | static int digi_port_remove(struct usb_serial_port *port) | |
1286 | { | |
1287 | struct digi_port *priv; | |
1288 | ||
1289 | priv = usb_get_serial_port_data(port); | |
1290 | kfree(priv); | |
1291 | ||
1292 | return 0; | |
1293 | } | |
1da177e4 | 1294 | |
c6d61269 | 1295 | static void digi_read_bulk_callback(struct urb *urb) |
1da177e4 | 1296 | { |
cdc97792 | 1297 | struct usb_serial_port *port = urb->context; |
1da177e4 LT |
1298 | struct digi_port *priv; |
1299 | struct digi_serial *serial_priv; | |
1300 | int ret; | |
85d75107 | 1301 | int status = urb->status; |
1da177e4 | 1302 | |
1da177e4 | 1303 | /* port sanity check, do not resubmit if port is not valid */ |
194343d9 GKH |
1304 | if (port == NULL) |
1305 | return; | |
1306 | priv = usb_get_serial_port_data(port); | |
1307 | if (priv == NULL) { | |
1308 | dev_err(&port->dev, "%s: port->private is NULL, status=%d\n", | |
1309 | __func__, status); | |
1da177e4 LT |
1310 | return; |
1311 | } | |
c6d61269 | 1312 | if (port->serial == NULL || |
41ad427d | 1313 | (serial_priv = usb_get_serial_data(port->serial)) == NULL) { |
194343d9 GKH |
1314 | dev_err(&port->dev, "%s: serial is bad or serial->private " |
1315 | "is NULL, status=%d\n", __func__, status); | |
1da177e4 LT |
1316 | return; |
1317 | } | |
1318 | ||
1319 | /* do not resubmit urb if it has any status error */ | |
85d75107 | 1320 | if (status) { |
194343d9 GKH |
1321 | dev_err(&port->dev, |
1322 | "%s: nonzero read bulk status: status=%d, port=%d\n", | |
1323 | __func__, status, priv->dp_port_num); | |
1da177e4 LT |
1324 | return; |
1325 | } | |
1326 | ||
1327 | /* handle oob or inb callback, do not resubmit if error */ | |
c6d61269 AC |
1328 | if (priv->dp_port_num == serial_priv->ds_oob_port_num) { |
1329 | if (digi_read_oob_callback(urb) != 0) | |
1da177e4 LT |
1330 | return; |
1331 | } else { | |
c6d61269 | 1332 | if (digi_read_inb_callback(urb) != 0) |
1da177e4 LT |
1333 | return; |
1334 | } | |
1335 | ||
1336 | /* continue read */ | |
41ad427d | 1337 | ret = usb_submit_urb(urb, GFP_ATOMIC); |
1f87158e | 1338 | if (ret != 0 && ret != -EPERM) { |
194343d9 GKH |
1339 | dev_err(&port->dev, |
1340 | "%s: failed resubmitting urb, ret=%d, port=%d\n", | |
1341 | __func__, ret, priv->dp_port_num); | |
1da177e4 LT |
1342 | } |
1343 | ||
1344 | } | |
1345 | ||
41ad427d AC |
1346 | /* |
1347 | * Digi Read INB Callback | |
1348 | * | |
1349 | * Digi Read INB Callback handles reads on the in band ports, sending | |
1350 | * the data on to the tty subsystem. When called we know port and | |
1351 | * port->private are not NULL and port->serial has been validated. | |
1352 | * It returns 0 if successful, 1 if successful but the port is | |
1353 | * throttled, and -1 if the sanity checks failed. | |
1354 | */ | |
1da177e4 | 1355 | |
c6d61269 | 1356 | static int digi_read_inb_callback(struct urb *urb) |
1da177e4 | 1357 | { |
cdc97792 | 1358 | struct usb_serial_port *port = urb->context; |
1da177e4 | 1359 | struct digi_port *priv = usb_get_serial_port_data(port); |
1b0aed2b | 1360 | unsigned char *buf = urb->transfer_buffer; |
041b7db9 | 1361 | unsigned long flags; |
1b0aed2b JH |
1362 | int opcode; |
1363 | int len; | |
1364 | int port_status; | |
1365 | unsigned char *data; | |
1d1de580 | 1366 | int tty_flag, throttled; |
1da177e4 LT |
1367 | |
1368 | /* short/multiple packet check */ | |
1b0aed2b JH |
1369 | if (urb->actual_length < 2) { |
1370 | dev_warn(&port->dev, "short packet received\n"); | |
1371 | return -1; | |
1372 | } | |
1373 | ||
1374 | opcode = buf[0]; | |
1375 | len = buf[1]; | |
1376 | ||
c6d61269 | 1377 | if (urb->actual_length != len + 2) { |
1b0aed2b JH |
1378 | dev_err(&port->dev, "malformed packet received: port=%d, opcode=%d, len=%d, actual_length=%u\n", |
1379 | priv->dp_port_num, opcode, len, urb->actual_length); | |
1380 | return -1; | |
1381 | } | |
1382 | ||
1383 | if (opcode == DIGI_CMD_RECEIVE_DATA && len < 1) { | |
1384 | dev_err(&port->dev, "malformed data packet received\n"); | |
c6d61269 | 1385 | return -1; |
1da177e4 LT |
1386 | } |
1387 | ||
041b7db9 | 1388 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 LT |
1389 | |
1390 | /* check for throttle; if set, do not resubmit read urb */ | |
1391 | /* indicate the read chain needs to be restarted on unthrottle */ | |
1392 | throttled = priv->dp_throttled; | |
c6d61269 | 1393 | if (throttled) |
1da177e4 LT |
1394 | priv->dp_throttle_restart = 1; |
1395 | ||
1396 | /* receive data */ | |
2e124b4a | 1397 | if (opcode == DIGI_CMD_RECEIVE_DATA) { |
1b0aed2b JH |
1398 | port_status = buf[2]; |
1399 | data = &buf[3]; | |
1400 | ||
85d75107 | 1401 | /* get flag from port_status */ |
1d1de580 | 1402 | tty_flag = 0; |
1da177e4 LT |
1403 | |
1404 | /* overrun is special, not associated with a char */ | |
c6d61269 | 1405 | if (port_status & DIGI_OVERRUN_ERROR) |
92a19f9c | 1406 | tty_insert_flip_char(&port->port, 0, TTY_OVERRUN); |
1da177e4 LT |
1407 | |
1408 | /* break takes precedence over parity, */ | |
1409 | /* which takes precedence over framing errors */ | |
c6d61269 | 1410 | if (port_status & DIGI_BREAK_ERROR) |
1d1de580 | 1411 | tty_flag = TTY_BREAK; |
c6d61269 | 1412 | else if (port_status & DIGI_PARITY_ERROR) |
1d1de580 | 1413 | tty_flag = TTY_PARITY; |
c6d61269 | 1414 | else if (port_status & DIGI_FRAMING_ERROR) |
1d1de580 | 1415 | tty_flag = TTY_FRAME; |
1da177e4 | 1416 | |
85d75107 | 1417 | /* data length is len-1 (one byte of len is port_status) */ |
1da177e4 | 1418 | --len; |
c6d61269 | 1419 | if (len > 0) { |
2f693357 | 1420 | tty_insert_flip_string_fixed_flag(&port->port, data, |
1d1de580 | 1421 | tty_flag, len); |
2e124b4a | 1422 | tty_flip_buffer_push(&port->port); |
1da177e4 | 1423 | } |
1da177e4 | 1424 | } |
041b7db9 | 1425 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
1da177e4 | 1426 | |
c6d61269 | 1427 | if (opcode == DIGI_CMD_RECEIVE_DISABLE) |
f9dfbebb | 1428 | dev_dbg(&port->dev, "%s: got RECEIVE_DISABLE\n", __func__); |
c6d61269 | 1429 | else if (opcode != DIGI_CMD_RECEIVE_DATA) |
f9dfbebb | 1430 | dev_dbg(&port->dev, "%s: unknown opcode: %d\n", __func__, opcode); |
1da177e4 | 1431 | |
41ad427d | 1432 | return throttled ? 1 : 0; |
1da177e4 LT |
1433 | |
1434 | } | |
1435 | ||
1436 | ||
41ad427d AC |
1437 | /* |
1438 | * Digi Read OOB Callback | |
1439 | * | |
1440 | * Digi Read OOB Callback handles reads on the out of band port. | |
1441 | * When called we know port and port->private are not NULL and | |
1442 | * the port->serial is valid. It returns 0 if successful, and | |
1443 | * -1 if the sanity checks failed. | |
1444 | */ | |
1da177e4 | 1445 | |
c6d61269 | 1446 | static int digi_read_oob_callback(struct urb *urb) |
1da177e4 LT |
1447 | { |
1448 | ||
cdc97792 | 1449 | struct usb_serial_port *port = urb->context; |
1da177e4 | 1450 | struct usb_serial *serial = port->serial; |
4a90f09b | 1451 | struct tty_struct *tty; |
1da177e4 | 1452 | struct digi_port *priv = usb_get_serial_port_data(port); |
2d380889 | 1453 | unsigned char *buf = urb->transfer_buffer; |
1da177e4 | 1454 | int opcode, line, status, val; |
041b7db9 | 1455 | unsigned long flags; |
1da177e4 | 1456 | int i; |
41ad427d | 1457 | unsigned int rts; |
1da177e4 | 1458 | |
2d380889 JH |
1459 | if (urb->actual_length < 4) |
1460 | return -1; | |
1461 | ||
1da177e4 | 1462 | /* handle each oob command */ |
2f682146 | 1463 | for (i = 0; i < urb->actual_length - 3; i += 4) { |
2d380889 JH |
1464 | opcode = buf[i]; |
1465 | line = buf[i + 1]; | |
1466 | status = buf[i + 2]; | |
1467 | val = buf[i + 3]; | |
1da177e4 | 1468 | |
f9dfbebb | 1469 | dev_dbg(&port->dev, "digi_read_oob_callback: opcode=%d, line=%d, status=%d, val=%d\n", |
c6d61269 | 1470 | opcode, line, status, val); |
1da177e4 | 1471 | |
c6d61269 | 1472 | if (status != 0 || line >= serial->type->num_ports) |
1da177e4 LT |
1473 | continue; |
1474 | ||
1475 | port = serial->port[line]; | |
1476 | ||
41ad427d AC |
1477 | priv = usb_get_serial_port_data(port); |
1478 | if (priv == NULL) | |
1da177e4 LT |
1479 | return -1; |
1480 | ||
4a90f09b | 1481 | tty = tty_port_tty_get(&port->port); |
4287341d | 1482 | |
41ad427d | 1483 | rts = 0; |
4287341d | 1484 | if (tty) |
9db276f8 PH |
1485 | rts = C_CRTSCTS(tty); |
1486 | ||
4287341d | 1487 | if (tty && opcode == DIGI_CMD_READ_INPUT_SIGNALS) { |
d7a77e34 JH |
1488 | bool wakeup = false; |
1489 | ||
041b7db9 | 1490 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 | 1491 | /* convert from digi flags to termiox flags */ |
c6d61269 | 1492 | if (val & DIGI_READ_INPUT_SIGNALS_CTS) { |
1da177e4 | 1493 | priv->dp_modem_signals |= TIOCM_CTS; |
d95e3cae | 1494 | if (rts) |
d7a77e34 | 1495 | wakeup = true; |
1da177e4 LT |
1496 | } else { |
1497 | priv->dp_modem_signals &= ~TIOCM_CTS; | |
1498 | /* port must be open to use tty struct */ | |
1da177e4 | 1499 | } |
c6d61269 | 1500 | if (val & DIGI_READ_INPUT_SIGNALS_DSR) |
1da177e4 LT |
1501 | priv->dp_modem_signals |= TIOCM_DSR; |
1502 | else | |
1503 | priv->dp_modem_signals &= ~TIOCM_DSR; | |
c6d61269 | 1504 | if (val & DIGI_READ_INPUT_SIGNALS_RI) |
1da177e4 LT |
1505 | priv->dp_modem_signals |= TIOCM_RI; |
1506 | else | |
1507 | priv->dp_modem_signals &= ~TIOCM_RI; | |
c6d61269 | 1508 | if (val & DIGI_READ_INPUT_SIGNALS_DCD) |
1da177e4 LT |
1509 | priv->dp_modem_signals |= TIOCM_CD; |
1510 | else | |
1511 | priv->dp_modem_signals &= ~TIOCM_CD; | |
1512 | ||
041b7db9 | 1513 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
d7a77e34 JH |
1514 | |
1515 | if (wakeup) | |
1516 | tty_port_tty_wakeup(&port->port); | |
c6d61269 | 1517 | } else if (opcode == DIGI_CMD_TRANSMIT_IDLE) { |
041b7db9 | 1518 | spin_lock_irqsave(&priv->dp_port_lock, flags); |
1da177e4 | 1519 | priv->dp_transmit_idle = 1; |
c6d61269 | 1520 | wake_up_interruptible(&priv->dp_transmit_idle_wait); |
041b7db9 | 1521 | spin_unlock_irqrestore(&priv->dp_port_lock, flags); |
c6d61269 AC |
1522 | } else if (opcode == DIGI_CMD_IFLUSH_FIFO) { |
1523 | wake_up_interruptible(&priv->dp_flush_wait); | |
1da177e4 | 1524 | } |
4a90f09b | 1525 | tty_kref_put(tty); |
1da177e4 | 1526 | } |
c6d61269 | 1527 | return 0; |
1da177e4 LT |
1528 | |
1529 | } | |
1530 | ||
68e24113 | 1531 | module_usb_serial_driver(serial_drivers, id_table_combined); |
1da177e4 | 1532 | |
c6d61269 AC |
1533 | MODULE_AUTHOR(DRIVER_AUTHOR); |
1534 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 | 1535 | MODULE_LICENSE("GPL"); |