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0b99d589 LL |
1 | /* |
2 | * Copyright 2003 Digi International (www.digi.com) | |
3 | * Scott H Kilau <Scott_Kilau at digi dot com> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2, or (at your option) | |
8 | * any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the | |
12 | * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR | |
13 | * PURPOSE. See the GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
18 | * | |
19 | * | |
8b07d521 | 20 | * NOTE TO LINUX KERNEL HACKERS: DO NOT REFORMAT THIS CODE! |
0b99d589 LL |
21 | * |
22 | * This is shared code between Digi's CVS archive and the | |
23 | * Linux Kernel sources. | |
24 | * Changing the source just for reformatting needlessly breaks | |
25 | * our CVS diff history. | |
26 | * | |
8b07d521 LL |
27 | * Send any bug fixes/changes to: Eng.Linux at digi dot com. |
28 | * Thank you. | |
0b99d589 LL |
29 | */ |
30 | ||
31 | /************************************************************************ | |
8b07d521 | 32 | * |
0b99d589 LL |
33 | * This file implements the tty driver functionality for the |
34 | * Neo and ClassicBoard PCI based product lines. | |
8b07d521 | 35 | * |
0b99d589 LL |
36 | ************************************************************************ |
37 | * | |
0b99d589 LL |
38 | */ |
39 | ||
40 | #include <linux/kernel.h> | |
0b99d589 LL |
41 | #include <linux/sched.h> /* For jiffies, task states */ |
42 | #include <linux/interrupt.h> /* For tasklet and interrupt structs/defines */ | |
43 | #include <linux/module.h> | |
44 | #include <linux/ctype.h> | |
45 | #include <linux/tty.h> | |
46 | #include <linux/tty_flip.h> | |
47 | #include <linux/serial_reg.h> | |
48 | #include <linux/slab.h> | |
90d2a471 | 49 | #include <linux/delay.h> /* For udelay */ |
0b99d589 LL |
50 | #include <asm/uaccess.h> /* For copy_from_user/copy_to_user */ |
51 | #include <linux/pci.h> | |
52 | ||
53 | #include "dgnc_driver.h" | |
54 | #include "dgnc_tty.h" | |
55 | #include "dgnc_types.h" | |
0b99d589 LL |
56 | #include "dgnc_neo.h" |
57 | #include "dgnc_cls.h" | |
58 | #include "dpacompat.h" | |
59 | #include "dgnc_sysfs.h" | |
60 | ||
90d2a471 | 61 | #define init_MUTEX(sem) sema_init(sem, 1) |
0b99d589 | 62 | #define DECLARE_MUTEX(name) \ |
90d2a471 | 63 | struct semaphore name = __SEMAPHORE_INITIALIZER(name, 1) |
0b99d589 LL |
64 | |
65 | /* | |
66 | * internal variables | |
67 | */ | |
03425f55 | 68 | static struct dgnc_board *dgnc_BoardsByMajor[256]; |
0b99d589 LL |
69 | static uchar *dgnc_TmpWriteBuf = NULL; |
70 | static DECLARE_MUTEX(dgnc_TmpWriteSem); | |
71 | ||
72 | /* | |
73 | * Default transparent print information. | |
74 | */ | |
75 | static struct digi_t dgnc_digi_init = { | |
76 | .digi_flags = DIGI_COOK, /* Flags */ | |
77 | .digi_maxcps = 100, /* Max CPS */ | |
78 | .digi_maxchar = 50, /* Max chars in print queue */ | |
79 | .digi_bufsize = 100, /* Printer buffer size */ | |
80 | .digi_onlen = 4, /* size of printer on string */ | |
81 | .digi_offlen = 4, /* size of printer off string */ | |
82 | .digi_onstr = "\033[5i", /* ANSI printer on string ] */ | |
83 | .digi_offstr = "\033[4i", /* ANSI printer off string ] */ | |
84 | .digi_term = "ansi" /* default terminal type */ | |
85 | }; | |
86 | ||
87 | ||
88 | /* | |
89 | * Define a local default termios struct. All ports will be created | |
90 | * with this termios initially. | |
91 | * | |
92 | * This defines a raw port at 9600 baud, 8 data bits, no parity, | |
93 | * 1 stop bit. | |
94 | */ | |
95 | static struct ktermios DgncDefaultTermios = | |
96 | { | |
97 | .c_iflag = (DEFAULT_IFLAGS), /* iflags */ | |
98 | .c_oflag = (DEFAULT_OFLAGS), /* oflags */ | |
99 | .c_cflag = (DEFAULT_CFLAGS), /* cflags */ | |
100 | .c_lflag = (DEFAULT_LFLAGS), /* lflags */ | |
101 | .c_cc = INIT_C_CC, | |
102 | .c_line = 0, | |
103 | }; | |
104 | ||
105 | ||
106 | /* Our function prototypes */ | |
107 | static int dgnc_tty_open(struct tty_struct *tty, struct file *file); | |
108 | static void dgnc_tty_close(struct tty_struct *tty, struct file *file); | |
109 | static int dgnc_block_til_ready(struct tty_struct *tty, struct file *file, struct channel_t *ch); | |
a31cefa2 | 110 | static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg); |
0b99d589 LL |
111 | static int dgnc_tty_digigeta(struct tty_struct *tty, struct digi_t __user *retinfo); |
112 | static int dgnc_tty_digiseta(struct tty_struct *tty, struct digi_t __user *new_info); | |
58b905b3 | 113 | static int dgnc_tty_write_room(struct tty_struct *tty); |
0b99d589 | 114 | static int dgnc_tty_put_char(struct tty_struct *tty, unsigned char c); |
58b905b3 | 115 | static int dgnc_tty_chars_in_buffer(struct tty_struct *tty); |
0b99d589 LL |
116 | static void dgnc_tty_start(struct tty_struct *tty); |
117 | static void dgnc_tty_stop(struct tty_struct *tty); | |
118 | static void dgnc_tty_throttle(struct tty_struct *tty); | |
119 | static void dgnc_tty_unthrottle(struct tty_struct *tty); | |
120 | static void dgnc_tty_flush_chars(struct tty_struct *tty); | |
121 | static void dgnc_tty_flush_buffer(struct tty_struct *tty); | |
122 | static void dgnc_tty_hangup(struct tty_struct *tty); | |
123 | static int dgnc_set_modem_info(struct tty_struct *tty, unsigned int command, unsigned int __user *value); | |
124 | static int dgnc_get_modem_info(struct channel_t *ch, unsigned int __user *value); | |
0b99d589 LL |
125 | static int dgnc_tty_tiocmget(struct tty_struct *tty); |
126 | static int dgnc_tty_tiocmset(struct tty_struct *tty, unsigned int set, unsigned int clear); | |
0b99d589 LL |
127 | static int dgnc_tty_send_break(struct tty_struct *tty, int msec); |
128 | static void dgnc_tty_wait_until_sent(struct tty_struct *tty, int timeout); | |
129 | static int dgnc_tty_write(struct tty_struct *tty, const unsigned char *buf, int count); | |
130 | static void dgnc_tty_set_termios(struct tty_struct *tty, struct ktermios *old_termios); | |
131 | static void dgnc_tty_send_xchar(struct tty_struct *tty, char ch); | |
132 | ||
133 | ||
134 | static const struct tty_operations dgnc_tty_ops = { | |
135 | .open = dgnc_tty_open, | |
136 | .close = dgnc_tty_close, | |
137 | .write = dgnc_tty_write, | |
138 | .write_room = dgnc_tty_write_room, | |
139 | .flush_buffer = dgnc_tty_flush_buffer, | |
140 | .chars_in_buffer = dgnc_tty_chars_in_buffer, | |
141 | .flush_chars = dgnc_tty_flush_chars, | |
142 | .ioctl = dgnc_tty_ioctl, | |
143 | .set_termios = dgnc_tty_set_termios, | |
144 | .stop = dgnc_tty_stop, | |
145 | .start = dgnc_tty_start, | |
146 | .throttle = dgnc_tty_throttle, | |
147 | .unthrottle = dgnc_tty_unthrottle, | |
148 | .hangup = dgnc_tty_hangup, | |
149 | .put_char = dgnc_tty_put_char, | |
150 | .tiocmget = dgnc_tty_tiocmget, | |
151 | .tiocmset = dgnc_tty_tiocmset, | |
152 | .break_ctl = dgnc_tty_send_break, | |
153 | .wait_until_sent = dgnc_tty_wait_until_sent, | |
154 | .send_xchar = dgnc_tty_send_xchar | |
155 | }; | |
156 | ||
157 | /************************************************************************ | |
8b07d521 | 158 | * |
0b99d589 | 159 | * TTY Initialization/Cleanup Functions |
8b07d521 | 160 | * |
0b99d589 | 161 | ************************************************************************/ |
8b07d521 | 162 | |
0b99d589 LL |
163 | /* |
164 | * dgnc_tty_preinit() | |
165 | * | |
166 | * Initialize any global tty related data before we download any boards. | |
167 | */ | |
168 | int dgnc_tty_preinit(void) | |
169 | { | |
170 | /* | |
171 | * Allocate a buffer for doing the copy from user space to | |
172 | * kernel space in dgnc_write(). We only use one buffer and | |
173 | * control access to it with a semaphore. If we are paging, we | |
174 | * are already in trouble so one buffer won't hurt much anyway. | |
175 | * | |
176 | * We are okay to sleep in the malloc, as this routine | |
177 | * is only called during module load, (not in interrupt context), | |
178 | * and with no locks held. | |
179 | */ | |
180 | dgnc_TmpWriteBuf = kmalloc(WRITEBUFLEN, GFP_KERNEL); | |
181 | ||
182 | if (!dgnc_TmpWriteBuf) { | |
183 | DPR_INIT(("unable to allocate tmp write buf")); | |
8f90ef80 | 184 | return -ENOMEM; |
0b99d589 LL |
185 | } |
186 | ||
8f90ef80 | 187 | return 0; |
0b99d589 LL |
188 | } |
189 | ||
190 | ||
191 | /* | |
192 | * dgnc_tty_register() | |
193 | * | |
194 | * Init the tty subsystem for this board. | |
195 | */ | |
03425f55 | 196 | int dgnc_tty_register(struct dgnc_board *brd) |
0b99d589 LL |
197 | { |
198 | int rc = 0; | |
199 | ||
200 | DPR_INIT(("tty_register start\n")); | |
201 | ||
0b99d589 | 202 | brd->SerialDriver.magic = TTY_DRIVER_MAGIC; |
8b07d521 | 203 | |
0b99d589 LL |
204 | snprintf(brd->SerialName, MAXTTYNAMELEN, "tty_dgnc_%d_", brd->boardnum); |
205 | ||
206 | brd->SerialDriver.name = brd->SerialName; | |
207 | brd->SerialDriver.name_base = 0; | |
208 | brd->SerialDriver.major = 0; | |
209 | brd->SerialDriver.minor_start = 0; | |
210 | brd->SerialDriver.num = brd->maxports; | |
8b07d521 LL |
211 | brd->SerialDriver.type = TTY_DRIVER_TYPE_SERIAL; |
212 | brd->SerialDriver.subtype = SERIAL_TYPE_NORMAL; | |
0b99d589 LL |
213 | brd->SerialDriver.init_termios = DgncDefaultTermios; |
214 | brd->SerialDriver.driver_name = DRVSTR; | |
215 | brd->SerialDriver.flags = (TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_HARDWARE_BREAK); | |
216 | ||
8b07d521 | 217 | /* |
0b99d589 | 218 | * The kernel wants space to store pointers to |
8b07d521 | 219 | * tty_struct's and termios's. |
0b99d589 | 220 | */ |
a07bf39a | 221 | brd->SerialDriver.ttys = kzalloc(brd->maxports * sizeof(*brd->SerialDriver.ttys), GFP_KERNEL); |
0b99d589 | 222 | if (!brd->SerialDriver.ttys) |
8f90ef80 | 223 | return -ENOMEM; |
0b99d589 | 224 | |
90d2a471 | 225 | kref_init(&brd->SerialDriver.kref); |
a07bf39a | 226 | brd->SerialDriver.termios = kzalloc(brd->maxports * sizeof(*brd->SerialDriver.termios), GFP_KERNEL); |
0b99d589 | 227 | if (!brd->SerialDriver.termios) |
8f90ef80 | 228 | return -ENOMEM; |
0b99d589 | 229 | |
0b99d589 LL |
230 | /* |
231 | * Entry points for driver. Called by the kernel from | |
232 | * tty_io.c and n_tty.c. | |
233 | */ | |
234 | tty_set_operations(&brd->SerialDriver, &dgnc_tty_ops); | |
235 | ||
236 | if (!brd->dgnc_Major_Serial_Registered) { | |
237 | /* Register tty devices */ | |
238 | rc = tty_register_driver(&brd->SerialDriver); | |
239 | if (rc < 0) { | |
240 | APR(("Can't register tty device (%d)\n", rc)); | |
8f90ef80 | 241 | return rc; |
0b99d589 LL |
242 | } |
243 | brd->dgnc_Major_Serial_Registered = TRUE; | |
244 | } | |
245 | ||
246 | /* | |
247 | * If we're doing transparent print, we have to do all of the above | |
79e30af2 | 248 | * again, separately so we don't get the LD confused about what major |
0b99d589 LL |
249 | * we are when we get into the dgnc_tty_open() routine. |
250 | */ | |
251 | brd->PrintDriver.magic = TTY_DRIVER_MAGIC; | |
252 | snprintf(brd->PrintName, MAXTTYNAMELEN, "pr_dgnc_%d_", brd->boardnum); | |
253 | ||
254 | brd->PrintDriver.name = brd->PrintName; | |
255 | brd->PrintDriver.name_base = 0; | |
256 | brd->PrintDriver.major = brd->SerialDriver.major; | |
257 | brd->PrintDriver.minor_start = 0x80; | |
258 | brd->PrintDriver.num = brd->maxports; | |
8b07d521 | 259 | brd->PrintDriver.type = TTY_DRIVER_TYPE_SERIAL; |
0b99d589 LL |
260 | brd->PrintDriver.subtype = SERIAL_TYPE_NORMAL; |
261 | brd->PrintDriver.init_termios = DgncDefaultTermios; | |
262 | brd->PrintDriver.driver_name = DRVSTR; | |
263 | brd->PrintDriver.flags = (TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_HARDWARE_BREAK); | |
264 | ||
265 | /* | |
266 | * The kernel wants space to store pointers to | |
79e30af2 | 267 | * tty_struct's and termios's. Must be separated from |
0b99d589 LL |
268 | * the Serial Driver so we don't get confused |
269 | */ | |
a07bf39a | 270 | brd->PrintDriver.ttys = kzalloc(brd->maxports * sizeof(*brd->PrintDriver.ttys), GFP_KERNEL); |
0b99d589 | 271 | if (!brd->PrintDriver.ttys) |
8f90ef80 | 272 | return -ENOMEM; |
90d2a471 | 273 | kref_init(&brd->PrintDriver.kref); |
a07bf39a | 274 | brd->PrintDriver.termios = kzalloc(brd->maxports * sizeof(*brd->PrintDriver.termios), GFP_KERNEL); |
0b99d589 | 275 | if (!brd->PrintDriver.termios) |
8f90ef80 | 276 | return -ENOMEM; |
0b99d589 | 277 | |
0b99d589 LL |
278 | /* |
279 | * Entry points for driver. Called by the kernel from | |
280 | * tty_io.c and n_tty.c. | |
281 | */ | |
282 | tty_set_operations(&brd->PrintDriver, &dgnc_tty_ops); | |
283 | ||
284 | if (!brd->dgnc_Major_TransparentPrint_Registered) { | |
285 | /* Register Transparent Print devices */ | |
90d2a471 | 286 | rc = tty_register_driver(&brd->PrintDriver); |
0b99d589 LL |
287 | if (rc < 0) { |
288 | APR(("Can't register Transparent Print device (%d)\n", rc)); | |
8f90ef80 | 289 | return rc; |
0b99d589 LL |
290 | } |
291 | brd->dgnc_Major_TransparentPrint_Registered = TRUE; | |
292 | } | |
293 | ||
294 | dgnc_BoardsByMajor[brd->SerialDriver.major] = brd; | |
295 | brd->dgnc_Serial_Major = brd->SerialDriver.major; | |
296 | brd->dgnc_TransparentPrint_Major = brd->PrintDriver.major; | |
297 | ||
298 | DPR_INIT(("DGNC REGISTER TTY: MAJOR: %d\n", brd->SerialDriver.major)); | |
299 | ||
8f90ef80 | 300 | return rc; |
0b99d589 LL |
301 | } |
302 | ||
303 | ||
304 | /* | |
305 | * dgnc_tty_init() | |
306 | * | |
307 | * Init the tty subsystem. Called once per board after board has been | |
308 | * downloaded and init'ed. | |
309 | */ | |
03425f55 | 310 | int dgnc_tty_init(struct dgnc_board *brd) |
0b99d589 LL |
311 | { |
312 | int i; | |
a7a75386 | 313 | void __iomem *vaddr; |
0b99d589 LL |
314 | struct channel_t *ch; |
315 | ||
316 | if (!brd) | |
8f90ef80 | 317 | return -ENXIO; |
0b99d589 LL |
318 | |
319 | DPR_INIT(("dgnc_tty_init start\n")); | |
320 | ||
321 | /* | |
322 | * Initialize board structure elements. | |
323 | */ | |
324 | ||
325 | vaddr = brd->re_map_membase; | |
326 | ||
327 | brd->nasync = brd->maxports; | |
328 | ||
329 | /* | |
330 | * Allocate channel memory that might not have been allocated | |
331 | * when the driver was first loaded. | |
332 | */ | |
333 | for (i = 0; i < brd->nasync; i++) { | |
334 | if (!brd->channels[i]) { | |
335 | ||
336 | /* | |
337 | * Okay to malloc with GFP_KERNEL, we are not at | |
338 | * interrupt context, and there are no locks held. | |
339 | */ | |
a07bf39a | 340 | brd->channels[i] = kzalloc(sizeof(*brd->channels[i]), GFP_KERNEL); |
0b99d589 LL |
341 | if (!brd->channels[i]) { |
342 | DPR_CORE(("%s:%d Unable to allocate memory for channel struct\n", | |
343 | __FILE__, __LINE__)); | |
344 | } | |
345 | } | |
346 | } | |
347 | ||
348 | ch = brd->channels[0]; | |
349 | vaddr = brd->re_map_membase; | |
350 | ||
351 | /* Set up channel variables */ | |
352 | for (i = 0; i < brd->nasync; i++, ch = brd->channels[i]) { | |
353 | ||
354 | if (!brd->channels[i]) | |
355 | continue; | |
356 | ||
357 | DGNC_SPINLOCK_INIT(ch->ch_lock); | |
358 | ||
359 | /* Store all our magic numbers */ | |
360 | ch->magic = DGNC_CHANNEL_MAGIC; | |
361 | ch->ch_tun.magic = DGNC_UNIT_MAGIC; | |
362 | ch->ch_tun.un_ch = ch; | |
363 | ch->ch_tun.un_type = DGNC_SERIAL; | |
364 | ch->ch_tun.un_dev = i; | |
365 | ||
366 | ch->ch_pun.magic = DGNC_UNIT_MAGIC; | |
367 | ch->ch_pun.un_ch = ch; | |
368 | ch->ch_pun.un_type = DGNC_PRINT; | |
369 | ch->ch_pun.un_dev = i + 128; | |
370 | ||
371 | if (brd->bd_uart_offset == 0x200) | |
a7a75386 | 372 | ch->ch_neo_uart = vaddr + (brd->bd_uart_offset * i); |
0b99d589 | 373 | else |
a7a75386 | 374 | ch->ch_cls_uart = vaddr + (brd->bd_uart_offset * i); |
0b99d589 LL |
375 | |
376 | ch->ch_bd = brd; | |
377 | ch->ch_portnum = i; | |
378 | ch->ch_digi = dgnc_digi_init; | |
379 | ||
380 | /* .25 second delay */ | |
381 | ch->ch_close_delay = 250; | |
382 | ||
383 | init_waitqueue_head(&ch->ch_flags_wait); | |
384 | init_waitqueue_head(&ch->ch_tun.un_flags_wait); | |
385 | init_waitqueue_head(&ch->ch_pun.un_flags_wait); | |
386 | init_waitqueue_head(&ch->ch_sniff_wait); | |
387 | ||
388 | { | |
389 | struct device *classp; | |
390 | classp = tty_register_device(&brd->SerialDriver, i, | |
391 | &(ch->ch_bd->pdev->dev)); | |
392 | ch->ch_tun.un_sysfs = classp; | |
393 | dgnc_create_tty_sysfs(&ch->ch_tun, classp); | |
394 | ||
395 | classp = tty_register_device(&brd->PrintDriver, i, | |
396 | &(ch->ch_bd->pdev->dev)); | |
397 | ch->ch_pun.un_sysfs = classp; | |
398 | dgnc_create_tty_sysfs(&ch->ch_pun, classp); | |
399 | } | |
400 | ||
401 | } | |
402 | ||
403 | DPR_INIT(("dgnc_tty_init finish\n")); | |
404 | ||
8f90ef80 | 405 | return 0; |
0b99d589 LL |
406 | } |
407 | ||
408 | ||
409 | /* | |
410 | * dgnc_tty_post_uninit() | |
411 | * | |
412 | * UnInitialize any global tty related data. | |
413 | */ | |
414 | void dgnc_tty_post_uninit(void) | |
415 | { | |
5b4af85e DY |
416 | kfree(dgnc_TmpWriteBuf); |
417 | dgnc_TmpWriteBuf = NULL; | |
0b99d589 LL |
418 | } |
419 | ||
420 | ||
421 | /* | |
422 | * dgnc_tty_uninit() | |
423 | * | |
424 | * Uninitialize the TTY portion of this driver. Free all memory and | |
8b07d521 | 425 | * resources. |
0b99d589 | 426 | */ |
03425f55 | 427 | void dgnc_tty_uninit(struct dgnc_board *brd) |
0b99d589 LL |
428 | { |
429 | int i = 0; | |
430 | ||
431 | if (brd->dgnc_Major_Serial_Registered) { | |
432 | dgnc_BoardsByMajor[brd->SerialDriver.major] = NULL; | |
433 | brd->dgnc_Serial_Major = 0; | |
434 | for (i = 0; i < brd->nasync; i++) { | |
435 | dgnc_remove_tty_sysfs(brd->channels[i]->ch_tun.un_sysfs); | |
436 | tty_unregister_device(&brd->SerialDriver, i); | |
437 | } | |
438 | tty_unregister_driver(&brd->SerialDriver); | |
439 | brd->dgnc_Major_Serial_Registered = FALSE; | |
440 | } | |
441 | ||
442 | if (brd->dgnc_Major_TransparentPrint_Registered) { | |
443 | dgnc_BoardsByMajor[brd->PrintDriver.major] = NULL; | |
444 | brd->dgnc_TransparentPrint_Major = 0; | |
445 | for (i = 0; i < brd->nasync; i++) { | |
446 | dgnc_remove_tty_sysfs(brd->channels[i]->ch_pun.un_sysfs); | |
447 | tty_unregister_device(&brd->PrintDriver, i); | |
448 | } | |
449 | tty_unregister_driver(&brd->PrintDriver); | |
450 | brd->dgnc_Major_TransparentPrint_Registered = FALSE; | |
451 | } | |
452 | ||
5b4af85e DY |
453 | kfree(brd->SerialDriver.ttys); |
454 | brd->SerialDriver.ttys = NULL; | |
455 | kfree(brd->PrintDriver.ttys); | |
456 | brd->PrintDriver.ttys = NULL; | |
0b99d589 LL |
457 | } |
458 | ||
459 | ||
460 | #define TMPBUFLEN (1024) | |
461 | ||
462 | /* | |
463 | * dgnc_sniff - Dump data out to the "sniff" buffer if the | |
464 | * proc sniff file is opened... | |
465 | */ | |
466 | void dgnc_sniff_nowait_nolock(struct channel_t *ch, uchar *text, uchar *buf, int len) | |
467 | { | |
468 | struct timeval tv; | |
469 | int n; | |
470 | int r; | |
471 | int nbuf; | |
472 | int i; | |
473 | int tmpbuflen; | |
474 | char tmpbuf[TMPBUFLEN]; | |
475 | char *p = tmpbuf; | |
476 | int too_much_data; | |
477 | ||
478 | /* Leave if sniff not open */ | |
479 | if (!(ch->ch_sniff_flags & SNIFF_OPEN)) | |
480 | return; | |
481 | ||
482 | do_gettimeofday(&tv); | |
483 | ||
484 | /* Create our header for data dump */ | |
485 | p += sprintf(p, "<%ld %ld><%s><", tv.tv_sec, tv.tv_usec, text); | |
486 | tmpbuflen = p - tmpbuf; | |
487 | ||
488 | do { | |
489 | too_much_data = 0; | |
490 | ||
491 | for (i = 0; i < len && tmpbuflen < (TMPBUFLEN - 4); i++) { | |
492 | p += sprintf(p, "%02x ", *buf); | |
493 | buf++; | |
494 | tmpbuflen = p - tmpbuf; | |
495 | } | |
496 | ||
497 | if (tmpbuflen < (TMPBUFLEN - 4)) { | |
498 | if (i > 0) | |
499 | p += sprintf(p - 1, "%s\n", ">"); | |
500 | else | |
501 | p += sprintf(p, "%s\n", ">"); | |
502 | } else { | |
503 | too_much_data = 1; | |
504 | len -= i; | |
505 | } | |
506 | ||
507 | nbuf = strlen(tmpbuf); | |
508 | p = tmpbuf; | |
509 | ||
510 | /* | |
511 | * Loop while data remains. | |
512 | */ | |
968a4e92 | 513 | while (nbuf > 0 && ch->ch_sniff_buf) { |
0b99d589 LL |
514 | /* |
515 | * Determine the amount of available space left in the | |
516 | * buffer. If there's none, wait until some appears. | |
517 | */ | |
518 | n = (ch->ch_sniff_out - ch->ch_sniff_in - 1) & SNIFF_MASK; | |
519 | ||
520 | /* | |
521 | * If there is no space left to write to in our sniff buffer, | |
522 | * we have no choice but to drop the data. | |
523 | * We *cannot* sleep here waiting for space, because this | |
524 | * function was probably called by the interrupt/timer routines! | |
525 | */ | |
50667c67 | 526 | if (n == 0) |
0b99d589 | 527 | return; |
8b07d521 | 528 | |
0b99d589 LL |
529 | /* |
530 | * Copy as much data as will fit. | |
531 | */ | |
532 | ||
533 | if (n > nbuf) | |
534 | n = nbuf; | |
535 | ||
536 | r = SNIFF_MAX - ch->ch_sniff_in; | |
537 | ||
538 | if (r <= n) { | |
539 | memcpy(ch->ch_sniff_buf + ch->ch_sniff_in, p, r); | |
540 | ||
541 | n -= r; | |
542 | ch->ch_sniff_in = 0; | |
543 | p += r; | |
544 | nbuf -= r; | |
545 | } | |
546 | ||
547 | memcpy(ch->ch_sniff_buf + ch->ch_sniff_in, p, n); | |
548 | ||
549 | ch->ch_sniff_in += n; | |
550 | p += n; | |
551 | nbuf -= n; | |
552 | ||
553 | /* | |
554 | * Wakeup any thread waiting for data | |
555 | */ | |
556 | if (ch->ch_sniff_flags & SNIFF_WAIT_DATA) { | |
557 | ch->ch_sniff_flags &= ~SNIFF_WAIT_DATA; | |
558 | wake_up_interruptible(&ch->ch_sniff_wait); | |
559 | } | |
560 | } | |
561 | ||
562 | /* | |
563 | * If the user sent us too much data to push into our tmpbuf, | |
564 | * we need to keep looping around on all the data. | |
565 | */ | |
566 | if (too_much_data) { | |
567 | p = tmpbuf; | |
568 | tmpbuflen = 0; | |
569 | } | |
570 | ||
571 | } while (too_much_data); | |
572 | } | |
573 | ||
574 | ||
575 | /*======================================================================= | |
576 | * | |
577 | * dgnc_wmove - Write data to transmit queue. | |
578 | * | |
579 | * ch - Pointer to channel structure. | |
580 | * buf - Poiter to characters to be moved. | |
581 | * n - Number of characters to move. | |
582 | * | |
583 | *=======================================================================*/ | |
584 | static void dgnc_wmove(struct channel_t *ch, char *buf, uint n) | |
585 | { | |
586 | int remain; | |
587 | uint head; | |
588 | ||
589 | if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) | |
590 | return; | |
8b07d521 | 591 | |
0b99d589 LL |
592 | head = ch->ch_w_head & WQUEUEMASK; |
593 | ||
594 | /* | |
595 | * If the write wraps over the top of the circular buffer, | |
596 | * move the portion up to the wrap point, and reset the | |
597 | * pointers to the bottom. | |
598 | */ | |
599 | remain = WQUEUESIZE - head; | |
600 | ||
601 | if (n >= remain) { | |
8b07d521 | 602 | n -= remain; |
0b99d589 LL |
603 | memcpy(ch->ch_wqueue + head, buf, remain); |
604 | head = 0; | |
605 | buf += remain; | |
606 | } | |
607 | ||
608 | if (n > 0) { | |
609 | /* | |
610 | * Move rest of data. | |
611 | */ | |
612 | remain = n; | |
613 | memcpy(ch->ch_wqueue + head, buf, remain); | |
614 | head += remain; | |
615 | } | |
616 | ||
617 | head &= WQUEUEMASK; | |
618 | ch->ch_w_head = head; | |
619 | } | |
620 | ||
621 | ||
622 | ||
623 | ||
624 | /*======================================================================= | |
625 | * | |
626 | * dgnc_input - Process received data. | |
8b07d521 | 627 | * |
90d2a471 | 628 | * ch - Pointer to channel structure. |
8b07d521 | 629 | * |
0b99d589 LL |
630 | *=======================================================================*/ |
631 | void dgnc_input(struct channel_t *ch) | |
632 | { | |
03425f55 | 633 | struct dgnc_board *bd; |
0b99d589 LL |
634 | struct tty_struct *tp; |
635 | struct tty_ldisc *ld; | |
636 | uint rmask; | |
637 | ushort head; | |
638 | ushort tail; | |
639 | int data_len; | |
640 | ulong lock_flags; | |
641 | int flip_len; | |
642 | int len = 0; | |
643 | int n = 0; | |
0b99d589 LL |
644 | int s = 0; |
645 | int i = 0; | |
646 | ||
647 | if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) | |
648 | return; | |
649 | ||
650 | tp = ch->ch_tun.un_tty; | |
651 | ||
652 | bd = ch->ch_bd; | |
a82477c3 | 653 | if (!bd || bd->magic != DGNC_BOARD_MAGIC) |
0b99d589 LL |
654 | return; |
655 | ||
656 | DGNC_LOCK(ch->ch_lock, lock_flags); | |
657 | ||
8b07d521 LL |
658 | /* |
659 | * Figure the number of characters in the buffer. | |
0b99d589 LL |
660 | * Exit immediately if none. |
661 | */ | |
662 | rmask = RQUEUEMASK; | |
663 | head = ch->ch_r_head & rmask; | |
664 | tail = ch->ch_r_tail & rmask; | |
665 | data_len = (head - tail) & rmask; | |
666 | ||
667 | if (data_len == 0) { | |
668 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
669 | return; | |
670 | } | |
671 | ||
672 | DPR_READ(("dgnc_input start\n")); | |
673 | ||
674 | /* | |
675 | * If the device is not open, or CREAD is off, | |
90d2a471 | 676 | * flush input data and return immediately. |
0b99d589 | 677 | */ |
8b07d521 | 678 | if (!tp || (tp->magic != TTY_MAGIC) || !(ch->ch_tun.un_flags & UN_ISOPEN) || |
22e3de76 | 679 | !(tp->termios.c_cflag & CREAD) || (ch->ch_tun.un_flags & UN_CLOSING)) { |
0b99d589 LL |
680 | |
681 | DPR_READ(("input. dropping %d bytes on port %d...\n", data_len, ch->ch_portnum)); | |
682 | DPR_READ(("input. tp: %p tp->magic: %x MAGIC:%x ch flags: %x\n", | |
683 | tp, tp ? tp->magic : 0, TTY_MAGIC, ch->ch_tun.un_flags)); | |
684 | ||
685 | ch->ch_r_head = tail; | |
686 | ||
687 | /* Force queue flow control to be released, if needed */ | |
688 | dgnc_check_queue_flow_control(ch); | |
689 | ||
690 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
691 | return; | |
692 | } | |
693 | ||
694 | /* | |
695 | * If we are throttled, simply don't read any data. | |
696 | */ | |
697 | if (ch->ch_flags & CH_FORCED_STOPI) { | |
698 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
699 | DPR_READ(("Port %d throttled, not reading any data. head: %x tail: %x\n", | |
700 | ch->ch_portnum, head, tail)); | |
701 | return; | |
702 | } | |
703 | ||
704 | DPR_READ(("dgnc_input start 2\n")); | |
705 | ||
100013fa | 706 | flip_len = TTY_FLIPBUF_SIZE; |
0b99d589 LL |
707 | |
708 | /* Chop down the length, if needed */ | |
709 | len = min(data_len, flip_len); | |
100013fa | 710 | len = min(len, (N_TTY_BUF_SIZE - 1)); |
0b99d589 LL |
711 | |
712 | ld = tty_ldisc_ref(tp); | |
713 | ||
714 | #ifdef TTY_DONT_FLIP | |
715 | /* | |
716 | * If the DONT_FLIP flag is on, don't flush our buffer, and act | |
717 | * like the ld doesn't have any space to put the data right now. | |
718 | */ | |
719 | if (test_bit(TTY_DONT_FLIP, &tp->flags)) | |
720 | len = 0; | |
721 | #endif | |
722 | ||
723 | /* | |
724 | * If we were unable to get a reference to the ld, | |
725 | * don't flush our buffer, and act like the ld doesn't | |
726 | * have any space to put the data right now. | |
727 | */ | |
728 | if (!ld) { | |
729 | len = 0; | |
730 | } else { | |
731 | /* | |
732 | * If ld doesn't have a pointer to a receive_buf function, | |
733 | * flush the data, then act like the ld doesn't have any | |
734 | * space to put the data right now. | |
735 | */ | |
736 | if (!ld->ops->receive_buf) { | |
737 | ch->ch_r_head = ch->ch_r_tail; | |
738 | len = 0; | |
8b07d521 | 739 | } |
0b99d589 LL |
740 | } |
741 | ||
742 | if (len <= 0) { | |
743 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
744 | if (ld) | |
745 | tty_ldisc_deref(ld); | |
746 | return; | |
747 | } | |
748 | ||
749 | /* | |
750 | * The tty layer in the kernel has changed in 2.6.16+. | |
751 | * | |
752 | * The flip buffers in the tty structure are no longer exposed, | |
753 | * and probably will be going away eventually. | |
8b07d521 | 754 | * |
0b99d589 LL |
755 | * If we are completely raw, we don't need to go through a lot |
756 | * of the tty layers that exist. | |
757 | * In this case, we take the shortest and fastest route we | |
758 | * can to relay the data to the user. | |
759 | * | |
760 | * On the other hand, if we are not raw, we need to go through | |
761 | * the new 2.6.16+ tty layer, which has its API more well defined. | |
762 | */ | |
100013fa LL |
763 | len = tty_buffer_request_room(tp->port, len); |
764 | n = len; | |
0b99d589 | 765 | |
100013fa LL |
766 | /* |
767 | * n now contains the most amount of data we can copy, | |
768 | * bounded either by how much the Linux tty layer can handle, | |
769 | * or the amount of data the card actually has pending... | |
770 | */ | |
771 | while (n) { | |
772 | s = ((head >= tail) ? head : RQUEUESIZE) - tail; | |
773 | s = min(s, n); | |
0b99d589 | 774 | |
100013fa LL |
775 | if (s <= 0) |
776 | break; | |
0b99d589 LL |
777 | |
778 | /* | |
8b07d521 | 779 | * If conditions are such that ld needs to see all |
100013fa LL |
780 | * UART errors, we will have to walk each character |
781 | * and error byte and send them to the buffer one at | |
782 | * a time. | |
0b99d589 | 783 | */ |
100013fa LL |
784 | if (I_PARMRK(tp) || I_BRKINT(tp) || I_INPCK(tp)) { |
785 | for (i = 0; i < s; i++) { | |
786 | if (*(ch->ch_equeue + tail + i) & UART_LSR_BI) | |
787 | tty_insert_flip_char(tp->port, *(ch->ch_rqueue + tail + i), TTY_BREAK); | |
788 | else if (*(ch->ch_equeue + tail + i) & UART_LSR_PE) | |
789 | tty_insert_flip_char(tp->port, *(ch->ch_rqueue + tail + i), TTY_PARITY); | |
790 | else if (*(ch->ch_equeue + tail + i) & UART_LSR_FE) | |
791 | tty_insert_flip_char(tp->port, *(ch->ch_rqueue + tail + i), TTY_FRAME); | |
792 | else | |
793 | tty_insert_flip_char(tp->port, *(ch->ch_rqueue + tail + i), TTY_NORMAL); | |
794 | } | |
2000c581 | 795 | } else { |
100013fa | 796 | tty_insert_flip_string(tp->port, ch->ch_rqueue + tail, s); |
0b99d589 LL |
797 | } |
798 | ||
100013fa | 799 | dgnc_sniff_nowait_nolock(ch, "USER READ", ch->ch_rqueue + tail, s); |
0b99d589 | 800 | |
100013fa LL |
801 | tail += s; |
802 | n -= s; | |
803 | /* Flip queue if needed */ | |
804 | tail &= rmask; | |
0b99d589 | 805 | } |
0b99d589 | 806 | |
100013fa LL |
807 | ch->ch_r_tail = tail & rmask; |
808 | ch->ch_e_tail = tail & rmask; | |
809 | dgnc_check_queue_flow_control(ch); | |
810 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
0b99d589 | 811 | |
100013fa LL |
812 | /* Tell the tty layer its okay to "eat" the data now */ |
813 | tty_flip_buffer_push(tp->port); | |
0b99d589 LL |
814 | |
815 | if (ld) | |
816 | tty_ldisc_deref(ld); | |
817 | ||
818 | DPR_READ(("dgnc_input - finish\n")); | |
819 | } | |
820 | ||
821 | ||
8b07d521 | 822 | /************************************************************************ |
0b99d589 | 823 | * Determines when CARRIER changes state and takes appropriate |
8b07d521 | 824 | * action. |
0b99d589 LL |
825 | ************************************************************************/ |
826 | void dgnc_carrier(struct channel_t *ch) | |
827 | { | |
03425f55 | 828 | struct dgnc_board *bd; |
0b99d589 | 829 | |
90d2a471 LL |
830 | int virt_carrier = 0; |
831 | int phys_carrier = 0; | |
8b07d521 | 832 | |
0b99d589 LL |
833 | DPR_CARR(("dgnc_carrier called...\n")); |
834 | ||
835 | if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) | |
836 | return; | |
837 | ||
838 | bd = ch->ch_bd; | |
839 | ||
840 | if (!bd || bd->magic != DGNC_BOARD_MAGIC) | |
841 | return; | |
842 | ||
843 | if (ch->ch_mistat & UART_MSR_DCD) { | |
844 | DPR_CARR(("mistat: %x D_CD: %x\n", ch->ch_mistat, ch->ch_mistat & UART_MSR_DCD)); | |
845 | phys_carrier = 1; | |
846 | } | |
847 | ||
50667c67 | 848 | if (ch->ch_digi.digi_flags & DIGI_FORCEDCD) |
0b99d589 | 849 | virt_carrier = 1; |
0b99d589 | 850 | |
50667c67 | 851 | if (ch->ch_c_cflag & CLOCAL) |
0b99d589 | 852 | virt_carrier = 1; |
0b99d589 LL |
853 | |
854 | DPR_CARR(("DCD: physical: %d virt: %d\n", phys_carrier, virt_carrier)); | |
855 | ||
856 | /* | |
857 | * Test for a VIRTUAL carrier transition to HIGH. | |
858 | */ | |
859 | if (((ch->ch_flags & CH_FCAR) == 0) && (virt_carrier == 1)) { | |
860 | ||
861 | /* | |
862 | * When carrier rises, wake any threads waiting | |
863 | * for carrier in the open routine. | |
864 | */ | |
865 | ||
866 | DPR_CARR(("carrier: virt DCD rose\n")); | |
867 | ||
868 | if (waitqueue_active(&(ch->ch_flags_wait))) | |
869 | wake_up_interruptible(&ch->ch_flags_wait); | |
870 | } | |
871 | ||
872 | /* | |
873 | * Test for a PHYSICAL carrier transition to HIGH. | |
874 | */ | |
875 | if (((ch->ch_flags & CH_CD) == 0) && (phys_carrier == 1)) { | |
876 | ||
877 | /* | |
878 | * When carrier rises, wake any threads waiting | |
879 | * for carrier in the open routine. | |
880 | */ | |
881 | ||
882 | DPR_CARR(("carrier: physical DCD rose\n")); | |
883 | ||
884 | if (waitqueue_active(&(ch->ch_flags_wait))) | |
885 | wake_up_interruptible(&ch->ch_flags_wait); | |
886 | } | |
887 | ||
888 | /* | |
889 | * Test for a PHYSICAL transition to low, so long as we aren't | |
890 | * currently ignoring physical transitions (which is what "virtual | |
891 | * carrier" indicates). | |
892 | * | |
893 | * The transition of the virtual carrier to low really doesn't | |
894 | * matter... it really only means "ignore carrier state", not | |
895 | * "make pretend that carrier is there". | |
896 | */ | |
897 | if ((virt_carrier == 0) && ((ch->ch_flags & CH_CD) != 0) && | |
8b07d521 | 898 | (phys_carrier == 0)) |
0b99d589 LL |
899 | { |
900 | ||
901 | /* | |
902 | * When carrier drops: | |
903 | * | |
904 | * Drop carrier on all open units. | |
905 | * | |
906 | * Flush queues, waking up any task waiting in the | |
907 | * line discipline. | |
908 | * | |
909 | * Send a hangup to the control terminal. | |
910 | * | |
911 | * Enable all select calls. | |
912 | */ | |
913 | if (waitqueue_active(&(ch->ch_flags_wait))) | |
914 | wake_up_interruptible(&ch->ch_flags_wait); | |
915 | ||
916 | if (ch->ch_tun.un_open_count > 0) { | |
917 | DPR_CARR(("Sending tty hangup\n")); | |
918 | tty_hangup(ch->ch_tun.un_tty); | |
919 | } | |
920 | ||
8b07d521 | 921 | if (ch->ch_pun.un_open_count > 0) { |
0b99d589 LL |
922 | DPR_CARR(("Sending pr hangup\n")); |
923 | tty_hangup(ch->ch_pun.un_tty); | |
924 | } | |
925 | } | |
926 | ||
927 | /* | |
928 | * Make sure that our cached values reflect the current reality. | |
929 | */ | |
930 | if (virt_carrier == 1) | |
931 | ch->ch_flags |= CH_FCAR; | |
8b07d521 | 932 | else |
0b99d589 LL |
933 | ch->ch_flags &= ~CH_FCAR; |
934 | ||
935 | if (phys_carrier == 1) | |
936 | ch->ch_flags |= CH_CD; | |
937 | else | |
938 | ch->ch_flags &= ~CH_CD; | |
939 | } | |
940 | ||
941 | /* | |
942 | * Assign the custom baud rate to the channel structure | |
943 | */ | |
944 | static void dgnc_set_custom_speed(struct channel_t *ch, uint newrate) | |
945 | { | |
946 | int testdiv; | |
947 | int testrate_high; | |
8b07d521 | 948 | int testrate_low; |
0b99d589 LL |
949 | int deltahigh; |
950 | int deltalow; | |
951 | ||
93c76c9c DY |
952 | if (newrate <= 0) { |
953 | ch->ch_custom_speed = 0; | |
954 | return; | |
955 | } | |
0b99d589 LL |
956 | |
957 | /* | |
958 | * Since the divisor is stored in a 16-bit integer, we make sure | |
959 | * we don't allow any rates smaller than a 16-bit integer would allow. | |
960 | * And of course, rates above the dividend won't fly. | |
961 | */ | |
962 | if (newrate && newrate < ((ch->ch_bd->bd_dividend / 0xFFFF) + 1)) | |
963 | newrate = ((ch->ch_bd->bd_dividend / 0xFFFF) + 1); | |
964 | ||
965 | if (newrate && newrate > ch->ch_bd->bd_dividend) | |
90d2a471 | 966 | newrate = ch->ch_bd->bd_dividend; |
0b99d589 | 967 | |
93c76c9c | 968 | if (newrate > 0) { |
0b99d589 LL |
969 | testdiv = ch->ch_bd->bd_dividend / newrate; |
970 | ||
971 | /* | |
972 | * If we try to figure out what rate the board would use | |
973 | * with the test divisor, it will be either equal or higher | |
974 | * than the requested baud rate. If we then determine the | |
8b07d521 | 975 | * rate with a divisor one higher, we will get the next lower |
0b99d589 LL |
976 | * supported rate below the requested. |
977 | */ | |
978 | testrate_high = ch->ch_bd->bd_dividend / testdiv; | |
979 | testrate_low = ch->ch_bd->bd_dividend / (testdiv + 1); | |
980 | ||
981 | /* | |
982 | * If the rate for the requested divisor is correct, just | |
983 | * use it and be done. | |
984 | */ | |
93c76c9c DY |
985 | if (testrate_high != newrate) { |
986 | /* | |
987 | * Otherwise, pick the rate that is closer (i.e. whichever rate | |
988 | * has a smaller delta). | |
989 | */ | |
990 | deltahigh = testrate_high - newrate; | |
991 | deltalow = newrate - testrate_low; | |
0b99d589 | 992 | |
50667c67 | 993 | if (deltahigh < deltalow) |
93c76c9c | 994 | newrate = testrate_high; |
50667c67 | 995 | else |
93c76c9c | 996 | newrate = testrate_low; |
0b99d589 | 997 | } |
0b99d589 | 998 | } |
8b07d521 | 999 | |
0b99d589 | 1000 | ch->ch_custom_speed = newrate; |
0b99d589 LL |
1001 | } |
1002 | ||
1003 | ||
1004 | void dgnc_check_queue_flow_control(struct channel_t *ch) | |
1005 | { | |
1006 | int qleft = 0; | |
1007 | ||
1008 | /* Store how much space we have left in the queue */ | |
f7c851d4 CP |
1009 | qleft = ch->ch_r_tail - ch->ch_r_head - 1; |
1010 | if (qleft < 0) | |
0b99d589 LL |
1011 | qleft += RQUEUEMASK + 1; |
1012 | ||
1013 | /* | |
1014 | * Check to see if we should enforce flow control on our queue because | |
1015 | * the ld (or user) isn't reading data out of our queue fast enuf. | |
1016 | * | |
1017 | * NOTE: This is done based on what the current flow control of the | |
1018 | * port is set for. | |
1019 | * | |
1020 | * 1) HWFLOW (RTS) - Turn off the UART's Receive interrupt. | |
1021 | * This will cause the UART's FIFO to back up, and force | |
1022 | * the RTS signal to be dropped. | |
1023 | * 2) SWFLOW (IXOFF) - Keep trying to send a stop character to | |
1024 | * the other side, in hopes it will stop sending data to us. | |
1025 | * 3) NONE - Nothing we can do. We will simply drop any extra data | |
1026 | * that gets sent into us when the queue fills up. | |
1027 | */ | |
1028 | if (qleft < 256) { | |
1029 | /* HWFLOW */ | |
1030 | if (ch->ch_digi.digi_flags & CTSPACE || ch->ch_c_cflag & CRTSCTS) { | |
a82477c3 | 1031 | if (!(ch->ch_flags & CH_RECEIVER_OFF)) { |
0b99d589 LL |
1032 | ch->ch_bd->bd_ops->disable_receiver(ch); |
1033 | ch->ch_flags |= (CH_RECEIVER_OFF); | |
1034 | DPR_READ(("Internal queue hit hilevel mark (%d)! Turning off interrupts.\n", | |
1035 | qleft)); | |
1036 | } | |
1037 | } | |
1038 | /* SWFLOW */ | |
1039 | else if (ch->ch_c_iflag & IXOFF) { | |
1040 | if (ch->ch_stops_sent <= MAX_STOPS_SENT) { | |
1041 | ch->ch_bd->bd_ops->send_stop_character(ch); | |
1042 | ch->ch_stops_sent++; | |
1043 | DPR_READ(("Sending stop char! Times sent: %x\n", ch->ch_stops_sent)); | |
1044 | } | |
1045 | } | |
1046 | /* No FLOW */ | |
1047 | else { | |
1048 | /* Empty... Can't do anything about the impending overflow... */ | |
1049 | } | |
1050 | } | |
1051 | ||
1052 | /* | |
1053 | * Check to see if we should unenforce flow control because | |
1054 | * ld (or user) finally read enuf data out of our queue. | |
1055 | * | |
1056 | * NOTE: This is done based on what the current flow control of the | |
1057 | * port is set for. | |
1058 | * | |
1059 | * 1) HWFLOW (RTS) - Turn back on the UART's Receive interrupt. | |
1060 | * This will cause the UART's FIFO to raise RTS back up, | |
1061 | * which will allow the other side to start sending data again. | |
1062 | * 2) SWFLOW (IXOFF) - Send a start character to | |
1063 | * the other side, so it will start sending data to us again. | |
1064 | * 3) NONE - Do nothing. Since we didn't do anything to turn off the | |
1065 | * other side, we don't need to do anything now. | |
1066 | */ | |
1067 | if (qleft > (RQUEUESIZE / 2)) { | |
1068 | /* HWFLOW */ | |
1069 | if (ch->ch_digi.digi_flags & RTSPACE || ch->ch_c_cflag & CRTSCTS) { | |
1070 | if (ch->ch_flags & CH_RECEIVER_OFF) { | |
1071 | ch->ch_bd->bd_ops->enable_receiver(ch); | |
1072 | ch->ch_flags &= ~(CH_RECEIVER_OFF); | |
1073 | DPR_READ(("Internal queue hit lowlevel mark (%d)! Turning on interrupts.\n", | |
1074 | qleft)); | |
1075 | } | |
1076 | } | |
1077 | /* SWFLOW */ | |
1078 | else if (ch->ch_c_iflag & IXOFF && ch->ch_stops_sent) { | |
1079 | ch->ch_stops_sent = 0; | |
1080 | ch->ch_bd->bd_ops->send_start_character(ch); | |
1081 | DPR_READ(("Sending start char!\n")); | |
1082 | } | |
1083 | /* No FLOW */ | |
1084 | else { | |
1085 | /* Nothing needed. */ | |
1086 | } | |
1087 | } | |
1088 | } | |
1089 | ||
1090 | ||
1091 | void dgnc_wakeup_writes(struct channel_t *ch) | |
1092 | { | |
1093 | int qlen = 0; | |
1094 | ulong lock_flags; | |
1095 | ||
1096 | if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) | |
1097 | return; | |
1098 | ||
1099 | DGNC_LOCK(ch->ch_lock, lock_flags); | |
1100 | ||
1101 | /* | |
1102 | * If channel now has space, wake up anyone waiting on the condition. | |
1103 | */ | |
f7c851d4 CP |
1104 | qlen = ch->ch_w_head - ch->ch_w_tail; |
1105 | if (qlen < 0) | |
90d2a471 | 1106 | qlen += WQUEUESIZE; |
0b99d589 LL |
1107 | |
1108 | if (qlen >= (WQUEUESIZE - 256)) { | |
1109 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
1110 | return; | |
1111 | } | |
1112 | ||
1113 | if (ch->ch_tun.un_flags & UN_ISOPEN) { | |
90d2a471 LL |
1114 | if ((ch->ch_tun.un_tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && |
1115 | ch->ch_tun.un_tty->ldisc->ops->write_wakeup) | |
1116 | { | |
1117 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
1118 | (ch->ch_tun.un_tty->ldisc->ops->write_wakeup)(ch->ch_tun.un_tty); | |
1119 | DGNC_LOCK(ch->ch_lock, lock_flags); | |
1120 | } | |
0b99d589 LL |
1121 | |
1122 | wake_up_interruptible(&ch->ch_tun.un_tty->write_wait); | |
1123 | ||
1124 | /* | |
1125 | * If unit is set to wait until empty, check to make sure | |
1126 | * the queue AND FIFO are both empty. | |
1127 | */ | |
1128 | if (ch->ch_tun.un_flags & UN_EMPTY) { | |
1129 | if ((qlen == 0) && (ch->ch_bd->bd_ops->get_uart_bytes_left(ch) == 0)) { | |
1130 | ch->ch_tun.un_flags &= ~(UN_EMPTY); | |
1131 | ||
1132 | /* | |
1133 | * If RTS Toggle mode is on, whenever | |
1134 | * the queue and UART is empty, keep RTS low. | |
1135 | */ | |
1136 | if (ch->ch_digi.digi_flags & DIGI_RTS_TOGGLE) { | |
1137 | ch->ch_mostat &= ~(UART_MCR_RTS); | |
1138 | ch->ch_bd->bd_ops->assert_modem_signals(ch); | |
1139 | } | |
1140 | ||
1141 | /* | |
1142 | * If DTR Toggle mode is on, whenever | |
1143 | * the queue and UART is empty, keep DTR low. | |
1144 | */ | |
1145 | if (ch->ch_digi.digi_flags & DIGI_DTR_TOGGLE) { | |
1146 | ch->ch_mostat &= ~(UART_MCR_DTR); | |
1147 | ch->ch_bd->bd_ops->assert_modem_signals(ch); | |
1148 | } | |
1149 | } | |
1150 | } | |
1151 | ||
1152 | wake_up_interruptible(&ch->ch_tun.un_flags_wait); | |
1153 | } | |
1154 | ||
1155 | if (ch->ch_pun.un_flags & UN_ISOPEN) { | |
90d2a471 LL |
1156 | if ((ch->ch_pun.un_tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && |
1157 | ch->ch_pun.un_tty->ldisc->ops->write_wakeup) | |
1158 | { | |
1159 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
1160 | (ch->ch_pun.un_tty->ldisc->ops->write_wakeup)(ch->ch_pun.un_tty); | |
1161 | DGNC_LOCK(ch->ch_lock, lock_flags); | |
1162 | } | |
0b99d589 LL |
1163 | |
1164 | wake_up_interruptible(&ch->ch_pun.un_tty->write_wait); | |
1165 | ||
1166 | /* | |
1167 | * If unit is set to wait until empty, check to make sure | |
1168 | * the queue AND FIFO are both empty. | |
1169 | */ | |
1170 | if (ch->ch_pun.un_flags & UN_EMPTY) { | |
1171 | if ((qlen == 0) && (ch->ch_bd->bd_ops->get_uart_bytes_left(ch) == 0)) { | |
1172 | ch->ch_pun.un_flags &= ~(UN_EMPTY); | |
1173 | } | |
1174 | } | |
1175 | ||
1176 | wake_up_interruptible(&ch->ch_pun.un_flags_wait); | |
1177 | } | |
1178 | ||
1179 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
1180 | } | |
1181 | ||
1182 | ||
1183 | ||
1184 | /************************************************************************ | |
8b07d521 | 1185 | * |
0b99d589 | 1186 | * TTY Entry points and helper functions |
8b07d521 | 1187 | * |
0b99d589 LL |
1188 | ************************************************************************/ |
1189 | ||
1190 | /* | |
1191 | * dgnc_tty_open() | |
1192 | * | |
1193 | */ | |
1194 | static int dgnc_tty_open(struct tty_struct *tty, struct file *file) | |
1195 | { | |
03425f55 | 1196 | struct dgnc_board *brd; |
0b99d589 LL |
1197 | struct channel_t *ch; |
1198 | struct un_t *un; | |
1199 | uint major = 0; | |
1200 | uint minor = 0; | |
1201 | int rc = 0; | |
1202 | ulong lock_flags; | |
1203 | ||
1204 | rc = 0; | |
1205 | ||
1206 | major = MAJOR(tty_devnum(tty)); | |
1207 | minor = MINOR(tty_devnum(tty)); | |
1208 | ||
50667c67 | 1209 | if (major > 255) |
0b99d589 | 1210 | return -ENXIO; |
0b99d589 LL |
1211 | |
1212 | /* Get board pointer from our array of majors we have allocated */ | |
1213 | brd = dgnc_BoardsByMajor[major]; | |
50667c67 | 1214 | if (!brd) |
0b99d589 | 1215 | return -ENXIO; |
0b99d589 LL |
1216 | |
1217 | /* | |
1218 | * If board is not yet up to a state of READY, go to | |
1219 | * sleep waiting for it to happen or they cancel the open. | |
1220 | */ | |
1221 | rc = wait_event_interruptible(brd->state_wait, | |
1222 | (brd->state & BOARD_READY)); | |
1223 | ||
50667c67 | 1224 | if (rc) |
0b99d589 | 1225 | return rc; |
0b99d589 LL |
1226 | |
1227 | DGNC_LOCK(brd->bd_lock, lock_flags); | |
1228 | ||
1229 | /* If opened device is greater than our number of ports, bail. */ | |
1230 | if (PORT_NUM(minor) > brd->nasync) { | |
1231 | DGNC_UNLOCK(brd->bd_lock, lock_flags); | |
1232 | return -ENXIO; | |
1233 | } | |
1234 | ||
1235 | ch = brd->channels[PORT_NUM(minor)]; | |
1236 | if (!ch) { | |
1237 | DGNC_UNLOCK(brd->bd_lock, lock_flags); | |
1238 | return -ENXIO; | |
1239 | } | |
1240 | ||
1241 | /* Drop board lock */ | |
1242 | DGNC_UNLOCK(brd->bd_lock, lock_flags); | |
1243 | ||
1244 | /* Grab channel lock */ | |
1245 | DGNC_LOCK(ch->ch_lock, lock_flags); | |
1246 | ||
1247 | /* Figure out our type */ | |
1248 | if (!IS_PRINT(minor)) { | |
1249 | un = &brd->channels[PORT_NUM(minor)]->ch_tun; | |
1250 | un->un_type = DGNC_SERIAL; | |
2000c581 | 1251 | } else if (IS_PRINT(minor)) { |
0b99d589 LL |
1252 | un = &brd->channels[PORT_NUM(minor)]->ch_pun; |
1253 | un->un_type = DGNC_PRINT; | |
2000c581 | 1254 | } else { |
0b99d589 LL |
1255 | DGNC_UNLOCK(ch->ch_lock, lock_flags); |
1256 | DPR_OPEN(("%d Unknown TYPE!\n", __LINE__)); | |
1257 | return -ENXIO; | |
1258 | } | |
1259 | ||
1260 | /* | |
1261 | * If the port is still in a previous open, and in a state | |
1262 | * where we simply cannot safely keep going, wait until the | |
1263 | * state clears. | |
1264 | */ | |
1265 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
1266 | ||
1267 | rc = wait_event_interruptible(ch->ch_flags_wait, ((ch->ch_flags & CH_OPENING) == 0)); | |
1268 | ||
1269 | /* If ret is non-zero, user ctrl-c'ed us */ | |
1270 | if (rc) { | |
1271 | DPR_OPEN(("%d User ctrl c'ed\n", __LINE__)); | |
1272 | return -EINTR; | |
1273 | } | |
1274 | ||
1275 | /* | |
1276 | * If either unit is in the middle of the fragile part of close, | |
1277 | * we just cannot touch the channel safely. | |
1278 | * Go to sleep, knowing that when the channel can be | |
1279 | * touched safely, the close routine will signal the | |
1280 | * ch_flags_wait to wake us back up. | |
1281 | */ | |
1282 | rc = wait_event_interruptible(ch->ch_flags_wait, | |
1283 | (((ch->ch_tun.un_flags | ch->ch_pun.un_flags) & UN_CLOSING) == 0)); | |
1284 | ||
1285 | /* If ret is non-zero, user ctrl-c'ed us */ | |
1286 | if (rc) { | |
1287 | DPR_OPEN(("%d User ctrl c'ed\n", __LINE__)); | |
1288 | return -EINTR; | |
1289 | } | |
1290 | ||
1291 | DGNC_LOCK(ch->ch_lock, lock_flags); | |
1292 | ||
1293 | ||
1294 | /* Store our unit into driver_data, so we always have it available. */ | |
1295 | tty->driver_data = un; | |
1296 | ||
1297 | DPR_OPEN(("Open called. MAJOR: %d MINOR:%d PORT_NUM: %x unit: %p NAME: %s\n", | |
1298 | MAJOR(tty_devnum(tty)), MINOR(tty_devnum(tty)), PORT_NUM(minor), un, brd->name)); | |
1299 | ||
1300 | DPR_OPEN(("%d: tflag=%x pflag=%x\n", __LINE__, ch->ch_tun.un_flags, ch->ch_pun.un_flags)); | |
1301 | ||
1302 | /* | |
1303 | * Initialize tty's | |
1304 | */ | |
1305 | if (!(un->un_flags & UN_ISOPEN)) { | |
1306 | /* Store important variables. */ | |
1307 | un->un_tty = tty; | |
1308 | ||
1309 | /* Maybe do something here to the TTY struct as well? */ | |
1310 | } | |
1311 | ||
1312 | ||
1313 | /* | |
1314 | * Allocate channel buffers for read/write/error. | |
1315 | * Set flag, so we don't get trounced on. | |
1316 | */ | |
1317 | ch->ch_flags |= (CH_OPENING); | |
1318 | ||
1319 | /* Drop locks, as malloc with GFP_KERNEL can sleep */ | |
1320 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
1321 | ||
1322 | if (!ch->ch_rqueue) | |
52f9d668 | 1323 | ch->ch_rqueue = kzalloc(RQUEUESIZE, GFP_KERNEL); |
0b99d589 | 1324 | if (!ch->ch_equeue) |
52f9d668 | 1325 | ch->ch_equeue = kzalloc(EQUEUESIZE, GFP_KERNEL); |
0b99d589 | 1326 | if (!ch->ch_wqueue) |
52f9d668 | 1327 | ch->ch_wqueue = kzalloc(WQUEUESIZE, GFP_KERNEL); |
0b99d589 LL |
1328 | |
1329 | DGNC_LOCK(ch->ch_lock, lock_flags); | |
1330 | ||
1331 | ch->ch_flags &= ~(CH_OPENING); | |
1332 | wake_up_interruptible(&ch->ch_flags_wait); | |
1333 | ||
1334 | /* | |
1335 | * Initialize if neither terminal or printer is open. | |
1336 | */ | |
1337 | if (!((ch->ch_tun.un_flags | ch->ch_pun.un_flags) & UN_ISOPEN)) { | |
1338 | ||
1339 | DPR_OPEN(("dgnc_open: initializing channel in open...\n")); | |
1340 | ||
1341 | /* | |
1342 | * Flush input queues. | |
1343 | */ | |
1344 | ch->ch_r_head = ch->ch_r_tail = 0; | |
1345 | ch->ch_e_head = ch->ch_e_tail = 0; | |
1346 | ch->ch_w_head = ch->ch_w_tail = 0; | |
1347 | ||
1348 | brd->bd_ops->flush_uart_write(ch); | |
1349 | brd->bd_ops->flush_uart_read(ch); | |
1350 | ||
1351 | ch->ch_flags = 0; | |
1352 | ch->ch_cached_lsr = 0; | |
1353 | ch->ch_stop_sending_break = 0; | |
1354 | ch->ch_stops_sent = 0; | |
1355 | ||
22e3de76 LL |
1356 | ch->ch_c_cflag = tty->termios.c_cflag; |
1357 | ch->ch_c_iflag = tty->termios.c_iflag; | |
1358 | ch->ch_c_oflag = tty->termios.c_oflag; | |
1359 | ch->ch_c_lflag = tty->termios.c_lflag; | |
1360 | ch->ch_startc = tty->termios.c_cc[VSTART]; | |
1361 | ch->ch_stopc = tty->termios.c_cc[VSTOP]; | |
0b99d589 LL |
1362 | |
1363 | /* | |
1364 | * Bring up RTS and DTR... | |
1365 | * Also handle RTS or DTR toggle if set. | |
1366 | */ | |
1367 | if (!(ch->ch_digi.digi_flags & DIGI_RTS_TOGGLE)) | |
1368 | ch->ch_mostat |= (UART_MCR_RTS); | |
1369 | if (!(ch->ch_digi.digi_flags & DIGI_DTR_TOGGLE)) | |
1370 | ch->ch_mostat |= (UART_MCR_DTR); | |
1371 | ||
1372 | /* Tell UART to init itself */ | |
1373 | brd->bd_ops->uart_init(ch); | |
1374 | } | |
1375 | ||
1376 | /* | |
1377 | * Run param in case we changed anything | |
1378 | */ | |
1379 | brd->bd_ops->param(tty); | |
1380 | ||
1381 | dgnc_carrier(ch); | |
1382 | ||
8b07d521 | 1383 | /* |
0b99d589 LL |
1384 | * follow protocol for opening port |
1385 | */ | |
1386 | ||
1387 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
1388 | ||
1389 | rc = dgnc_block_til_ready(tty, file, ch); | |
1390 | ||
50667c67 | 1391 | if (rc) |
0b99d589 LL |
1392 | DPR_OPEN(("dgnc_tty_open returning after dgnc_block_til_ready " |
1393 | "with %d\n", rc)); | |
0b99d589 LL |
1394 | |
1395 | /* No going back now, increment our unit and channel counters */ | |
1396 | DGNC_LOCK(ch->ch_lock, lock_flags); | |
1397 | ch->ch_open_count++; | |
1398 | un->un_open_count++; | |
1399 | un->un_flags |= (UN_ISOPEN); | |
1400 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
1401 | ||
1402 | DPR_OPEN(("dgnc_tty_open finished\n")); | |
8f90ef80 | 1403 | return rc; |
0b99d589 LL |
1404 | } |
1405 | ||
1406 | ||
8b07d521 | 1407 | /* |
0b99d589 LL |
1408 | * dgnc_block_til_ready() |
1409 | * | |
1410 | * Wait for DCD, if needed. | |
1411 | */ | |
1412 | static int dgnc_block_til_ready(struct tty_struct *tty, struct file *file, struct channel_t *ch) | |
8b07d521 | 1413 | { |
0b99d589 LL |
1414 | int retval = 0; |
1415 | struct un_t *un = NULL; | |
1416 | ulong lock_flags; | |
1417 | uint old_flags = 0; | |
1418 | int sleep_on_un_flags = 0; | |
1419 | ||
1420 | if (!tty || tty->magic != TTY_MAGIC || !file || !ch || ch->magic != DGNC_CHANNEL_MAGIC) { | |
8f90ef80 | 1421 | return -ENXIO; |
0b99d589 LL |
1422 | } |
1423 | ||
1424 | un = tty->driver_data; | |
50667c67 | 1425 | if (!un || un->magic != DGNC_UNIT_MAGIC) |
8f90ef80 | 1426 | return -ENXIO; |
0b99d589 LL |
1427 | |
1428 | DPR_OPEN(("dgnc_block_til_ready - before block.\n")); | |
1429 | ||
1430 | DGNC_LOCK(ch->ch_lock, lock_flags); | |
1431 | ||
1432 | ch->ch_wopen++; | |
1433 | ||
1434 | /* Loop forever */ | |
1435 | while (1) { | |
1436 | ||
1437 | sleep_on_un_flags = 0; | |
1438 | ||
1439 | /* | |
1440 | * If board has failed somehow during our sleep, bail with error. | |
1441 | */ | |
1442 | if (ch->ch_bd->state == BOARD_FAILED) { | |
1443 | retval = -ENXIO; | |
1444 | break; | |
1445 | } | |
1446 | ||
1447 | /* If tty was hung up, break out of loop and set error. */ | |
1448 | if (tty_hung_up_p(file)) { | |
1449 | retval = -EAGAIN; | |
1450 | break; | |
1451 | } | |
1452 | ||
1453 | /* | |
1454 | * If either unit is in the middle of the fragile part of close, | |
1455 | * we just cannot touch the channel safely. | |
1456 | * Go back to sleep, knowing that when the channel can be | |
8b07d521 | 1457 | * touched safely, the close routine will signal the |
0b99d589 LL |
1458 | * ch_wait_flags to wake us back up. |
1459 | */ | |
1460 | if (!((ch->ch_tun.un_flags | ch->ch_pun.un_flags) & UN_CLOSING)) { | |
1461 | ||
1462 | /* | |
1463 | * Our conditions to leave cleanly and happily: | |
1464 | * 1) NONBLOCKING on the tty is set. | |
1465 | * 2) CLOCAL is set. | |
1466 | * 3) DCD (fake or real) is active. | |
1467 | */ | |
1468 | ||
50667c67 | 1469 | if (file->f_flags & O_NONBLOCK) |
0b99d589 | 1470 | break; |
0b99d589 LL |
1471 | |
1472 | if (tty->flags & (1 << TTY_IO_ERROR)) { | |
1473 | retval = -EIO; | |
1474 | break; | |
1475 | } | |
1476 | ||
1477 | if (ch->ch_flags & CH_CD) { | |
1478 | DPR_OPEN(("%d: ch_flags: %x\n", __LINE__, ch->ch_flags)); | |
1479 | break; | |
1480 | } | |
1481 | ||
1482 | if (ch->ch_flags & CH_FCAR) { | |
1483 | DPR_OPEN(("%d: ch_flags: %x\n", __LINE__, ch->ch_flags)); | |
1484 | break; | |
1485 | } | |
2000c581 | 1486 | } else { |
0b99d589 LL |
1487 | sleep_on_un_flags = 1; |
1488 | } | |
1489 | ||
1490 | /* | |
1491 | * If there is a signal pending, the user probably | |
1492 | * interrupted (ctrl-c) us. | |
1493 | * Leave loop with error set. | |
1494 | */ | |
1495 | if (signal_pending(current)) { | |
1496 | DPR_OPEN(("%d: signal pending...\n", __LINE__)); | |
1497 | retval = -ERESTARTSYS; | |
1498 | break; | |
1499 | } | |
1500 | ||
1501 | DPR_OPEN(("dgnc_block_til_ready - blocking.\n")); | |
1502 | ||
1503 | /* | |
1504 | * Store the flags before we let go of channel lock | |
1505 | */ | |
1506 | if (sleep_on_un_flags) | |
1507 | old_flags = ch->ch_tun.un_flags | ch->ch_pun.un_flags; | |
1508 | else | |
1509 | old_flags = ch->ch_flags; | |
1510 | ||
1511 | /* | |
1512 | * Let go of channel lock before calling schedule. | |
1513 | * Our poller will get any FEP events and wake us up when DCD | |
1514 | * eventually goes active. | |
1515 | */ | |
1516 | ||
1517 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
1518 | ||
1519 | DPR_OPEN(("Going to sleep on %s flags...\n", | |
1520 | (sleep_on_un_flags ? "un" : "ch"))); | |
1521 | ||
1522 | /* | |
1523 | * Wait for something in the flags to change from the current value. | |
1524 | */ | |
50667c67 | 1525 | if (sleep_on_un_flags) |
0b99d589 LL |
1526 | retval = wait_event_interruptible(un->un_flags_wait, |
1527 | (old_flags != (ch->ch_tun.un_flags | ch->ch_pun.un_flags))); | |
50667c67 | 1528 | else |
0b99d589 LL |
1529 | retval = wait_event_interruptible(ch->ch_flags_wait, |
1530 | (old_flags != ch->ch_flags)); | |
0b99d589 LL |
1531 | |
1532 | DPR_OPEN(("After sleep... retval: %x\n", retval)); | |
1533 | ||
1534 | /* | |
1535 | * We got woken up for some reason. | |
1536 | * Before looping around, grab our channel lock. | |
1537 | */ | |
1538 | DGNC_LOCK(ch->ch_lock, lock_flags); | |
1539 | } | |
1540 | ||
1541 | ch->ch_wopen--; | |
1542 | ||
1543 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
1544 | ||
1545 | DPR_OPEN(("dgnc_block_til_ready - after blocking.\n")); | |
1546 | ||
1547 | if (retval) { | |
1548 | DPR_OPEN(("dgnc_block_til_ready - done. error. retval: %x\n", retval)); | |
8f90ef80 | 1549 | return retval; |
0b99d589 LL |
1550 | } |
1551 | ||
1552 | DPR_OPEN(("dgnc_block_til_ready - done no error. jiffies: %lu\n", jiffies)); | |
1553 | ||
8f90ef80 | 1554 | return 0; |
0b99d589 LL |
1555 | } |
1556 | ||
1557 | ||
1558 | /* | |
1559 | * dgnc_tty_hangup() | |
1560 | * | |
1561 | * Hangup the port. Like a close, but don't wait for output to drain. | |
8b07d521 | 1562 | */ |
0b99d589 LL |
1563 | static void dgnc_tty_hangup(struct tty_struct *tty) |
1564 | { | |
1565 | struct un_t *un; | |
1566 | ||
1567 | if (!tty || tty->magic != TTY_MAGIC) | |
1568 | return; | |
1569 | ||
1570 | un = tty->driver_data; | |
1571 | if (!un || un->magic != DGNC_UNIT_MAGIC) | |
1572 | return; | |
1573 | ||
1574 | DPR_CLOSE(("dgnc_hangup called. ch->ch_open_count: %d un->un_open_count: %d\n", | |
1575 | un->un_ch->ch_open_count, un->un_open_count)); | |
1576 | ||
1577 | /* flush the transmit queues */ | |
1578 | dgnc_tty_flush_buffer(tty); | |
1579 | ||
1580 | DPR_CLOSE(("dgnc_hangup finished. ch->ch_open_count: %d un->un_open_count: %d\n", | |
1581 | un->un_ch->ch_open_count, un->un_open_count)); | |
1582 | } | |
1583 | ||
1584 | ||
1585 | /* | |
1586 | * dgnc_tty_close() | |
1587 | * | |
1588 | */ | |
1589 | static void dgnc_tty_close(struct tty_struct *tty, struct file *file) | |
1590 | { | |
1591 | struct ktermios *ts; | |
03425f55 | 1592 | struct dgnc_board *bd; |
0b99d589 LL |
1593 | struct channel_t *ch; |
1594 | struct un_t *un; | |
1595 | ulong lock_flags; | |
1596 | int rc = 0; | |
1597 | ||
1598 | if (!tty || tty->magic != TTY_MAGIC) | |
1599 | return; | |
1600 | ||
1601 | un = tty->driver_data; | |
1602 | if (!un || un->magic != DGNC_UNIT_MAGIC) | |
1603 | return; | |
1604 | ||
1605 | ch = un->un_ch; | |
1606 | if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) | |
1607 | return; | |
1608 | ||
1609 | bd = ch->ch_bd; | |
1610 | if (!bd || bd->magic != DGNC_BOARD_MAGIC) | |
1611 | return; | |
1612 | ||
5857a0b5 | 1613 | ts = &tty->termios; |
0b99d589 LL |
1614 | |
1615 | DPR_CLOSE(("Close called\n")); | |
1616 | ||
1617 | DGNC_LOCK(ch->ch_lock, lock_flags); | |
1618 | ||
1619 | /* | |
1620 | * Determine if this is the last close or not - and if we agree about | |
1621 | * which type of close it is with the Line Discipline | |
1622 | */ | |
1623 | if ((tty->count == 1) && (un->un_open_count != 1)) { | |
1624 | /* | |
1625 | * Uh, oh. tty->count is 1, which means that the tty | |
1626 | * structure will be freed. un_open_count should always | |
1627 | * be one in these conditions. If it's greater than | |
1628 | * one, we've got real problems, since it means the | |
1629 | * serial port won't be shutdown. | |
1630 | */ | |
1631 | APR(("tty->count is 1, un open count is %d\n", un->un_open_count)); | |
1632 | un->un_open_count = 1; | |
8b07d521 | 1633 | } |
0b99d589 | 1634 | |
3098e514 DY |
1635 | if (un->un_open_count) |
1636 | un->un_open_count--; | |
1637 | else | |
0b99d589 | 1638 | APR(("bad serial port open count of %d\n", un->un_open_count)); |
0b99d589 LL |
1639 | |
1640 | ch->ch_open_count--; | |
1641 | ||
1642 | if (ch->ch_open_count && un->un_open_count) { | |
1643 | DPR_CLOSE(("dgnc_tty_close: not last close ch: %d un:%d\n", | |
1644 | ch->ch_open_count, un->un_open_count)); | |
1645 | ||
1646 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
90d2a471 LL |
1647 | return; |
1648 | } | |
0b99d589 LL |
1649 | |
1650 | /* OK, its the last close on the unit */ | |
1651 | DPR_CLOSE(("dgnc_tty_close - last close on unit procedures\n")); | |
1652 | ||
1653 | un->un_flags |= UN_CLOSING; | |
1654 | ||
1655 | tty->closing = 1; | |
1656 | ||
1657 | ||
1658 | /* | |
1659 | * Only officially close channel if count is 0 and | |
90d2a471 | 1660 | * DIGI_PRINTER bit is not set. |
0b99d589 LL |
1661 | */ |
1662 | if ((ch->ch_open_count == 0) && !(ch->ch_digi.digi_flags & DIGI_PRINTER)) { | |
1663 | ||
1664 | ch->ch_flags &= ~(CH_STOPI | CH_FORCED_STOPI); | |
1665 | ||
1666 | /* | |
1667 | * turn off print device when closing print device. | |
1668 | */ | |
9cdf838b | 1669 | if ((un->un_type == DGNC_PRINT) && (ch->ch_flags & CH_PRON)) { |
0b99d589 LL |
1670 | dgnc_wmove(ch, ch->ch_digi.digi_offstr, |
1671 | (int) ch->ch_digi.digi_offlen); | |
1672 | ch->ch_flags &= ~CH_PRON; | |
1673 | } | |
1674 | ||
1675 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
1676 | /* wait for output to drain */ | |
1677 | /* This will also return if we take an interrupt */ | |
1678 | ||
1679 | DPR_CLOSE(("Calling wait_for_drain\n")); | |
1680 | rc = bd->bd_ops->drain(tty, 0); | |
1681 | ||
1682 | DPR_CLOSE(("After calling wait_for_drain\n")); | |
1683 | ||
50667c67 | 1684 | if (rc) |
0b99d589 | 1685 | DPR_BASIC(("dgnc_tty_close - bad return: %d ", rc)); |
0b99d589 LL |
1686 | |
1687 | dgnc_tty_flush_buffer(tty); | |
1688 | tty_ldisc_flush(tty); | |
1689 | ||
1690 | DGNC_LOCK(ch->ch_lock, lock_flags); | |
1691 | ||
1692 | tty->closing = 0; | |
1693 | ||
1694 | /* | |
1695 | * If we have HUPCL set, lower DTR and RTS | |
1696 | */ | |
1697 | if (ch->ch_c_cflag & HUPCL) { | |
1698 | DPR_CLOSE(("Close. HUPCL set, dropping DTR/RTS\n")); | |
1699 | ||
1700 | /* Drop RTS/DTR */ | |
1701 | ch->ch_mostat &= ~(UART_MCR_DTR | UART_MCR_RTS); | |
1702 | bd->bd_ops->assert_modem_signals(ch); | |
1703 | ||
1704 | /* | |
8b07d521 | 1705 | * Go to sleep to ensure RTS/DTR |
0b99d589 LL |
1706 | * have been dropped for modems to see it. |
1707 | */ | |
1708 | if (ch->ch_close_delay) { | |
1709 | DPR_CLOSE(("Close. Sleeping for RTS/DTR drop\n")); | |
1710 | ||
1711 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
1712 | dgnc_ms_sleep(ch->ch_close_delay); | |
1713 | DGNC_LOCK(ch->ch_lock, lock_flags); | |
1714 | ||
1715 | DPR_CLOSE(("Close. After sleeping for RTS/DTR drop\n")); | |
1716 | } | |
1717 | } | |
1718 | ||
1719 | ch->ch_old_baud = 0; | |
1720 | ||
1721 | /* Turn off UART interrupts for this port */ | |
1722 | ch->ch_bd->bd_ops->uart_off(ch); | |
2000c581 | 1723 | } else { |
0b99d589 LL |
1724 | /* |
1725 | * turn off print device when closing print device. | |
1726 | */ | |
9cdf838b | 1727 | if ((un->un_type == DGNC_PRINT) && (ch->ch_flags & CH_PRON)) { |
0b99d589 LL |
1728 | dgnc_wmove(ch, ch->ch_digi.digi_offstr, |
1729 | (int) ch->ch_digi.digi_offlen); | |
1730 | ch->ch_flags &= ~CH_PRON; | |
1731 | } | |
1732 | } | |
1733 | ||
1734 | un->un_tty = NULL; | |
1735 | un->un_flags &= ~(UN_ISOPEN | UN_CLOSING); | |
1736 | ||
1737 | DPR_CLOSE(("Close. Doing wakeups\n")); | |
1738 | wake_up_interruptible(&ch->ch_flags_wait); | |
1739 | wake_up_interruptible(&un->un_flags_wait); | |
1740 | ||
1741 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
1742 | ||
90d2a471 | 1743 | DPR_BASIC(("dgnc_tty_close - complete\n")); |
0b99d589 LL |
1744 | } |
1745 | ||
1746 | ||
1747 | /* | |
1748 | * dgnc_tty_chars_in_buffer() | |
1749 | * | |
1750 | * Return number of characters that have not been transmitted yet. | |
1751 | * | |
1752 | * This routine is used by the line discipline to determine if there | |
1753 | * is data waiting to be transmitted/drained/flushed or not. | |
1754 | */ | |
1755 | static int dgnc_tty_chars_in_buffer(struct tty_struct *tty) | |
1756 | { | |
1757 | struct channel_t *ch = NULL; | |
1758 | struct un_t *un = NULL; | |
1759 | ushort thead; | |
1760 | ushort ttail; | |
1761 | uint tmask; | |
1762 | uint chars = 0; | |
1763 | ulong lock_flags = 0; | |
1764 | ||
1765 | if (tty == NULL) | |
8f90ef80 | 1766 | return 0; |
0b99d589 LL |
1767 | |
1768 | un = tty->driver_data; | |
1769 | if (!un || un->magic != DGNC_UNIT_MAGIC) | |
8f90ef80 | 1770 | return 0; |
0b99d589 LL |
1771 | |
1772 | ch = un->un_ch; | |
1773 | if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) | |
8f90ef80 | 1774 | return 0; |
0b99d589 LL |
1775 | |
1776 | DGNC_LOCK(ch->ch_lock, lock_flags); | |
1777 | ||
1778 | tmask = WQUEUEMASK; | |
1779 | thead = ch->ch_w_head & tmask; | |
1780 | ttail = ch->ch_w_tail & tmask; | |
1781 | ||
1782 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
1783 | ||
1784 | if (ttail == thead) { | |
1785 | chars = 0; | |
1786 | } else { | |
1787 | if (thead >= ttail) | |
1788 | chars = thead - ttail; | |
1789 | else | |
1790 | chars = thead - ttail + WQUEUESIZE; | |
1791 | } | |
1792 | ||
90d2a471 | 1793 | DPR_WRITE(("dgnc_tty_chars_in_buffer. Port: %x - %d (head: %d tail: %d)\n", |
0b99d589 LL |
1794 | ch->ch_portnum, chars, thead, ttail)); |
1795 | ||
8f90ef80 | 1796 | return chars; |
0b99d589 LL |
1797 | } |
1798 | ||
1799 | ||
8b07d521 | 1800 | /* |
0b99d589 LL |
1801 | * dgnc_maxcps_room |
1802 | * | |
1803 | * Reduces bytes_available to the max number of characters | |
1804 | * that can be sent currently given the maxcps value, and | |
1805 | * returns the new bytes_available. This only affects printer | |
1806 | * output. | |
8b07d521 | 1807 | */ |
0b99d589 LL |
1808 | static int dgnc_maxcps_room(struct tty_struct *tty, int bytes_available) |
1809 | { | |
1810 | struct channel_t *ch = NULL; | |
1811 | struct un_t *un = NULL; | |
1812 | ||
1813 | if (!tty) | |
8f90ef80 | 1814 | return bytes_available; |
0b99d589 LL |
1815 | |
1816 | un = tty->driver_data; | |
1817 | if (!un || un->magic != DGNC_UNIT_MAGIC) | |
8f90ef80 | 1818 | return bytes_available; |
0b99d589 LL |
1819 | |
1820 | ch = un->un_ch; | |
1821 | if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) | |
8f90ef80 | 1822 | return bytes_available; |
0b99d589 LL |
1823 | |
1824 | /* | |
1825 | * If its not the Transparent print device, return | |
1826 | * the full data amount. | |
1827 | */ | |
1828 | if (un->un_type != DGNC_PRINT) | |
8f90ef80 | 1829 | return bytes_available; |
0b99d589 | 1830 | |
9cdf838b | 1831 | if (ch->ch_digi.digi_maxcps > 0 && ch->ch_digi.digi_bufsize > 0) { |
0b99d589 LL |
1832 | int cps_limit = 0; |
1833 | unsigned long current_time = jiffies; | |
1834 | unsigned long buffer_time = current_time + | |
1835 | (HZ * ch->ch_digi.digi_bufsize) / ch->ch_digi.digi_maxcps; | |
1836 | ||
1837 | if (ch->ch_cpstime < current_time) { | |
1838 | /* buffer is empty */ | |
90d2a471 | 1839 | ch->ch_cpstime = current_time; /* reset ch_cpstime */ |
0b99d589 | 1840 | cps_limit = ch->ch_digi.digi_bufsize; |
2000c581 | 1841 | } else if (ch->ch_cpstime < buffer_time) { |
0b99d589 LL |
1842 | /* still room in the buffer */ |
1843 | cps_limit = ((buffer_time - ch->ch_cpstime) * ch->ch_digi.digi_maxcps) / HZ; | |
2000c581 | 1844 | } else { |
0b99d589 | 1845 | /* no room in the buffer */ |
8b07d521 | 1846 | cps_limit = 0; |
0b99d589 LL |
1847 | } |
1848 | ||
1849 | bytes_available = min(cps_limit, bytes_available); | |
1850 | } | |
1851 | ||
8f90ef80 | 1852 | return bytes_available; |
0b99d589 LL |
1853 | } |
1854 | ||
1855 | ||
1856 | /* | |
1857 | * dgnc_tty_write_room() | |
1858 | * | |
1859 | * Return space available in Tx buffer | |
8b07d521 | 1860 | */ |
0b99d589 LL |
1861 | static int dgnc_tty_write_room(struct tty_struct *tty) |
1862 | { | |
1863 | struct channel_t *ch = NULL; | |
1864 | struct un_t *un = NULL; | |
1865 | ushort head; | |
1866 | ushort tail; | |
1867 | ushort tmask; | |
1868 | int ret = 0; | |
1869 | ulong lock_flags = 0; | |
1870 | ||
1871 | if (tty == NULL || dgnc_TmpWriteBuf == NULL) | |
8f90ef80 | 1872 | return 0; |
0b99d589 LL |
1873 | |
1874 | un = tty->driver_data; | |
1875 | if (!un || un->magic != DGNC_UNIT_MAGIC) | |
8f90ef80 | 1876 | return 0; |
0b99d589 LL |
1877 | |
1878 | ch = un->un_ch; | |
1879 | if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) | |
8f90ef80 | 1880 | return 0; |
0b99d589 LL |
1881 | |
1882 | DGNC_LOCK(ch->ch_lock, lock_flags); | |
1883 | ||
1884 | tmask = WQUEUEMASK; | |
1885 | head = (ch->ch_w_head) & tmask; | |
1886 | tail = (ch->ch_w_tail) & tmask; | |
1887 | ||
f7c851d4 CP |
1888 | ret = tail - head - 1; |
1889 | if (ret < 0) | |
0b99d589 LL |
1890 | ret += WQUEUESIZE; |
1891 | ||
1892 | /* Limit printer to maxcps */ | |
1893 | ret = dgnc_maxcps_room(tty, ret); | |
1894 | ||
1895 | /* | |
8b07d521 | 1896 | * If we are printer device, leave space for |
0b99d589 LL |
1897 | * possibly both the on and off strings. |
1898 | */ | |
1899 | if (un->un_type == DGNC_PRINT) { | |
1900 | if (!(ch->ch_flags & CH_PRON)) | |
1901 | ret -= ch->ch_digi.digi_onlen; | |
1902 | ret -= ch->ch_digi.digi_offlen; | |
2000c581 | 1903 | } else { |
0b99d589 LL |
1904 | if (ch->ch_flags & CH_PRON) |
1905 | ret -= ch->ch_digi.digi_offlen; | |
1906 | } | |
1907 | ||
1908 | if (ret < 0) | |
1909 | ret = 0; | |
1910 | ||
1911 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
8b07d521 | 1912 | |
0b99d589 LL |
1913 | DPR_WRITE(("dgnc_tty_write_room - %d tail: %d head: %d\n", ret, tail, head)); |
1914 | ||
8f90ef80 | 1915 | return ret; |
0b99d589 LL |
1916 | } |
1917 | ||
1918 | ||
1919 | /* | |
1920 | * dgnc_tty_put_char() | |
1921 | * | |
1922 | * Put a character into ch->ch_buf | |
8b07d521 | 1923 | * |
0b99d589 LL |
1924 | * - used by the line discipline for OPOST processing |
1925 | */ | |
1926 | static int dgnc_tty_put_char(struct tty_struct *tty, unsigned char c) | |
1927 | { | |
1928 | /* | |
1929 | * Simply call tty_write. | |
1930 | */ | |
1931 | DPR_WRITE(("dgnc_tty_put_char called\n")); | |
1932 | dgnc_tty_write(tty, &c, 1); | |
1933 | return 1; | |
1934 | } | |
1935 | ||
1936 | ||
1937 | /* | |
1938 | * dgnc_tty_write() | |
1939 | * | |
1940 | * Take data from the user or kernel and send it out to the FEP. | |
1941 | * In here exists all the Transparent Print magic as well. | |
1942 | */ | |
1943 | static int dgnc_tty_write(struct tty_struct *tty, | |
1944 | const unsigned char *buf, int count) | |
1945 | { | |
1946 | struct channel_t *ch = NULL; | |
1947 | struct un_t *un = NULL; | |
1948 | int bufcount = 0, n = 0; | |
1949 | int orig_count = 0; | |
1950 | ulong lock_flags; | |
1951 | ushort head; | |
1952 | ushort tail; | |
1953 | ushort tmask; | |
1954 | uint remain; | |
1955 | int from_user = 0; | |
1956 | ||
1957 | if (tty == NULL || dgnc_TmpWriteBuf == NULL) | |
8f90ef80 | 1958 | return 0; |
0b99d589 LL |
1959 | |
1960 | un = tty->driver_data; | |
1961 | if (!un || un->magic != DGNC_UNIT_MAGIC) | |
8f90ef80 | 1962 | return 0; |
0b99d589 LL |
1963 | |
1964 | ch = un->un_ch; | |
1965 | if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) | |
8f90ef80 | 1966 | return 0; |
0b99d589 LL |
1967 | |
1968 | if (!count) | |
8f90ef80 | 1969 | return 0; |
0b99d589 LL |
1970 | |
1971 | DPR_WRITE(("dgnc_tty_write: Port: %x tty=%p user=%d len=%d\n", | |
1972 | ch->ch_portnum, tty, from_user, count)); | |
1973 | ||
1974 | /* | |
1975 | * Store original amount of characters passed in. | |
1976 | * This helps to figure out if we should ask the FEP | |
1977 | * to send us an event when it has more space available. | |
1978 | */ | |
1979 | orig_count = count; | |
1980 | ||
1981 | DGNC_LOCK(ch->ch_lock, lock_flags); | |
1982 | ||
1983 | /* Get our space available for the channel from the board */ | |
1984 | tmask = WQUEUEMASK; | |
1985 | head = (ch->ch_w_head) & tmask; | |
1986 | tail = (ch->ch_w_tail) & tmask; | |
1987 | ||
f7c851d4 CP |
1988 | bufcount = tail - head - 1; |
1989 | if (bufcount < 0) | |
0b99d589 LL |
1990 | bufcount += WQUEUESIZE; |
1991 | ||
1992 | DPR_WRITE(("%d: bufcount: %x count: %x tail: %x head: %x tmask: %x\n", | |
1993 | __LINE__, bufcount, count, tail, head, tmask)); | |
1994 | ||
1995 | /* | |
1996 | * Limit printer output to maxcps overall, with bursts allowed | |
1997 | * up to bufsize characters. | |
1998 | */ | |
1999 | bufcount = dgnc_maxcps_room(tty, bufcount); | |
2000 | ||
2001 | /* | |
2002 | * Take minimum of what the user wants to send, and the | |
2003 | * space available in the FEP buffer. | |
2004 | */ | |
2005 | count = min(count, bufcount); | |
2006 | ||
2007 | /* | |
2008 | * Bail if no space left. | |
2009 | */ | |
2010 | if (count <= 0) { | |
2011 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
8f90ef80 | 2012 | return 0; |
0b99d589 LL |
2013 | } |
2014 | ||
2015 | /* | |
2016 | * Output the printer ON string, if we are in terminal mode, but | |
2017 | * need to be in printer mode. | |
2018 | */ | |
2019 | if ((un->un_type == DGNC_PRINT) && !(ch->ch_flags & CH_PRON)) { | |
2020 | dgnc_wmove(ch, ch->ch_digi.digi_onstr, | |
2021 | (int) ch->ch_digi.digi_onlen); | |
2022 | head = (ch->ch_w_head) & tmask; | |
2023 | ch->ch_flags |= CH_PRON; | |
2024 | } | |
2025 | ||
2026 | /* | |
2027 | * On the other hand, output the printer OFF string, if we are | |
2028 | * currently in printer mode, but need to output to the terminal. | |
2029 | */ | |
2030 | if ((un->un_type != DGNC_PRINT) && (ch->ch_flags & CH_PRON)) { | |
2031 | dgnc_wmove(ch, ch->ch_digi.digi_offstr, | |
2032 | (int) ch->ch_digi.digi_offlen); | |
2033 | head = (ch->ch_w_head) & tmask; | |
2034 | ch->ch_flags &= ~CH_PRON; | |
2035 | } | |
2036 | ||
2037 | /* | |
2038 | * If there is nothing left to copy, or I can't handle any more data, leave. | |
8b07d521 | 2039 | */ |
0b99d589 LL |
2040 | if (count <= 0) { |
2041 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
8f90ef80 | 2042 | return 0; |
0b99d589 LL |
2043 | } |
2044 | ||
2045 | if (from_user) { | |
2046 | ||
2047 | count = min(count, WRITEBUFLEN); | |
2048 | ||
2049 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
2050 | ||
2051 | /* | |
2052 | * If data is coming from user space, copy it into a temporary | |
2053 | * buffer so we don't get swapped out while doing the copy to | |
2054 | * the board. | |
2055 | */ | |
2056 | /* we're allowed to block if it's from_user */ | |
50667c67 | 2057 | if (down_interruptible(&dgnc_TmpWriteSem)) |
8f90ef80 | 2058 | return -EINTR; |
0b99d589 LL |
2059 | |
2060 | /* | |
2061 | * copy_from_user() returns the number | |
2062 | * of bytes that could *NOT* be copied. | |
2063 | */ | |
2064 | count -= copy_from_user(dgnc_TmpWriteBuf, (const uchar __user *) buf, count); | |
2065 | ||
2066 | if (!count) { | |
2067 | up(&dgnc_TmpWriteSem); | |
8f90ef80 | 2068 | return -EFAULT; |
0b99d589 LL |
2069 | } |
2070 | ||
2071 | DGNC_LOCK(ch->ch_lock, lock_flags); | |
2072 | ||
2073 | buf = dgnc_TmpWriteBuf; | |
2074 | ||
2075 | } | |
2076 | ||
2077 | n = count; | |
2078 | ||
2079 | /* | |
2080 | * If the write wraps over the top of the circular buffer, | |
2081 | * move the portion up to the wrap point, and reset the | |
2082 | * pointers to the bottom. | |
2083 | */ | |
2084 | remain = WQUEUESIZE - head; | |
2085 | ||
2086 | if (n >= remain) { | |
2087 | n -= remain; | |
2088 | memcpy(ch->ch_wqueue + head, buf, remain); | |
2089 | dgnc_sniff_nowait_nolock(ch, "USER WRITE", ch->ch_wqueue + head, remain); | |
2090 | head = 0; | |
2091 | buf += remain; | |
2092 | } | |
2093 | ||
2094 | if (n > 0) { | |
2095 | /* | |
2096 | * Move rest of data. | |
2097 | */ | |
2098 | remain = n; | |
2099 | memcpy(ch->ch_wqueue + head, buf, remain); | |
2100 | dgnc_sniff_nowait_nolock(ch, "USER WRITE", ch->ch_wqueue + head, remain); | |
2101 | head += remain; | |
2102 | } | |
2103 | ||
2104 | if (count) { | |
2105 | head &= tmask; | |
2106 | ch->ch_w_head = head; | |
2107 | } | |
2108 | ||
0b99d589 LL |
2109 | /* Update printer buffer empty time. */ |
2110 | if ((un->un_type == DGNC_PRINT) && (ch->ch_digi.digi_maxcps > 0) | |
2111 | && (ch->ch_digi.digi_bufsize > 0)) { | |
90d2a471 | 2112 | ch->ch_cpstime += (HZ * count) / ch->ch_digi.digi_maxcps; |
0b99d589 LL |
2113 | } |
2114 | ||
2115 | if (from_user) { | |
2116 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
2117 | up(&dgnc_TmpWriteSem); | |
2118 | } else { | |
2119 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
2120 | } | |
2121 | ||
2122 | DPR_WRITE(("Write finished - Write %d bytes of %d.\n", count, orig_count)); | |
2123 | ||
2124 | if (count) { | |
2125 | /* | |
2126 | * Channel lock is grabbed and then released | |
2127 | * inside this routine. | |
2128 | */ | |
2129 | ch->ch_bd->bd_ops->copy_data_from_queue_to_uart(ch); | |
2130 | } | |
2131 | ||
8f90ef80 | 2132 | return count; |
0b99d589 LL |
2133 | } |
2134 | ||
2135 | ||
2136 | /* | |
2137 | * Return modem signals to ld. | |
2138 | */ | |
b74c7461 | 2139 | |
0b99d589 | 2140 | static int dgnc_tty_tiocmget(struct tty_struct *tty) |
0b99d589 LL |
2141 | { |
2142 | struct channel_t *ch; | |
2143 | struct un_t *un; | |
2144 | int result = -EIO; | |
2145 | uchar mstat = 0; | |
2146 | ulong lock_flags; | |
2147 | ||
2148 | if (!tty || tty->magic != TTY_MAGIC) | |
2149 | return result; | |
2150 | ||
2151 | un = tty->driver_data; | |
2152 | if (!un || un->magic != DGNC_UNIT_MAGIC) | |
2153 | return result; | |
2154 | ||
2155 | ch = un->un_ch; | |
2156 | if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) | |
2157 | return result; | |
2158 | ||
2159 | DPR_IOCTL(("dgnc_tty_tiocmget start\n")); | |
2160 | ||
2161 | DGNC_LOCK(ch->ch_lock, lock_flags); | |
2162 | ||
2163 | mstat = (ch->ch_mostat | ch->ch_mistat); | |
2164 | ||
2165 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
2166 | ||
2167 | result = 0; | |
2168 | ||
2169 | if (mstat & UART_MCR_DTR) | |
2170 | result |= TIOCM_DTR; | |
2171 | if (mstat & UART_MCR_RTS) | |
2172 | result |= TIOCM_RTS; | |
2173 | if (mstat & UART_MSR_CTS) | |
2174 | result |= TIOCM_CTS; | |
2175 | if (mstat & UART_MSR_DSR) | |
2176 | result |= TIOCM_DSR; | |
2177 | if (mstat & UART_MSR_RI) | |
2178 | result |= TIOCM_RI; | |
2179 | if (mstat & UART_MSR_DCD) | |
2180 | result |= TIOCM_CD; | |
2181 | ||
2182 | DPR_IOCTL(("dgnc_tty_tiocmget finish\n")); | |
2183 | ||
2184 | return result; | |
2185 | } | |
2186 | ||
2187 | ||
2188 | /* | |
2189 | * dgnc_tty_tiocmset() | |
2190 | * | |
2191 | * Set modem signals, called by ld. | |
2192 | */ | |
b74c7461 | 2193 | |
0b99d589 | 2194 | static int dgnc_tty_tiocmset(struct tty_struct *tty, |
90d2a471 | 2195 | unsigned int set, unsigned int clear) |
0b99d589 | 2196 | { |
03425f55 | 2197 | struct dgnc_board *bd; |
0b99d589 LL |
2198 | struct channel_t *ch; |
2199 | struct un_t *un; | |
2200 | int ret = -EIO; | |
2201 | ulong lock_flags; | |
2202 | ||
2203 | if (!tty || tty->magic != TTY_MAGIC) | |
2204 | return ret; | |
2205 | ||
2206 | un = tty->driver_data; | |
2207 | if (!un || un->magic != DGNC_UNIT_MAGIC) | |
2208 | return ret; | |
2209 | ||
2210 | ch = un->un_ch; | |
2211 | if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) | |
2212 | return ret; | |
2213 | ||
2214 | bd = ch->ch_bd; | |
2215 | if (!bd || bd->magic != DGNC_BOARD_MAGIC) | |
2216 | return ret; | |
2217 | ||
2218 | DPR_IOCTL(("dgnc_tty_tiocmset start\n")); | |
2219 | ||
2220 | ||
2221 | DGNC_LOCK(ch->ch_lock, lock_flags); | |
2222 | ||
50667c67 | 2223 | if (set & TIOCM_RTS) |
0b99d589 | 2224 | ch->ch_mostat |= UART_MCR_RTS; |
0b99d589 | 2225 | |
50667c67 | 2226 | if (set & TIOCM_DTR) |
0b99d589 | 2227 | ch->ch_mostat |= UART_MCR_DTR; |
0b99d589 | 2228 | |
50667c67 | 2229 | if (clear & TIOCM_RTS) |
0b99d589 | 2230 | ch->ch_mostat &= ~(UART_MCR_RTS); |
0b99d589 | 2231 | |
50667c67 | 2232 | if (clear & TIOCM_DTR) |
0b99d589 | 2233 | ch->ch_mostat &= ~(UART_MCR_DTR); |
0b99d589 LL |
2234 | |
2235 | ch->ch_bd->bd_ops->assert_modem_signals(ch); | |
2236 | ||
2237 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
2238 | ||
2239 | DPR_IOCTL(("dgnc_tty_tiocmset finish\n")); | |
2240 | ||
8f90ef80 | 2241 | return 0; |
0b99d589 LL |
2242 | } |
2243 | ||
2244 | ||
2245 | /* | |
2246 | * dgnc_tty_send_break() | |
2247 | * | |
2248 | * Send a Break, called by ld. | |
2249 | */ | |
2250 | static int dgnc_tty_send_break(struct tty_struct *tty, int msec) | |
2251 | { | |
03425f55 | 2252 | struct dgnc_board *bd; |
0b99d589 LL |
2253 | struct channel_t *ch; |
2254 | struct un_t *un; | |
2255 | int ret = -EIO; | |
2256 | ulong lock_flags; | |
2257 | ||
2258 | if (!tty || tty->magic != TTY_MAGIC) | |
2259 | return ret; | |
2260 | ||
2261 | un = tty->driver_data; | |
2262 | if (!un || un->magic != DGNC_UNIT_MAGIC) | |
2263 | return ret; | |
2264 | ||
2265 | ch = un->un_ch; | |
2266 | if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) | |
2267 | return ret; | |
2268 | ||
2269 | bd = ch->ch_bd; | |
2270 | if (!bd || bd->magic != DGNC_BOARD_MAGIC) | |
2271 | return ret; | |
2272 | ||
2273 | switch (msec) { | |
2274 | case -1: | |
2275 | msec = 0xFFFF; | |
2276 | break; | |
2277 | case 0: | |
2278 | msec = 0; | |
2279 | break; | |
2280 | default: | |
2281 | break; | |
2282 | } | |
2283 | ||
2284 | DPR_IOCTL(("dgnc_tty_send_break start 1. %lx\n", jiffies)); | |
2285 | ||
2286 | DGNC_LOCK(ch->ch_lock, lock_flags); | |
2287 | ||
2288 | ch->ch_bd->bd_ops->send_break(ch, msec); | |
2289 | ||
2290 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
2291 | ||
2292 | DPR_IOCTL(("dgnc_tty_send_break finish\n")); | |
2293 | ||
8f90ef80 | 2294 | return 0; |
0b99d589 LL |
2295 | |
2296 | } | |
2297 | ||
2298 | ||
2299 | /* | |
2300 | * dgnc_tty_wait_until_sent() | |
2301 | * | |
2302 | * wait until data has been transmitted, called by ld. | |
2303 | */ | |
2304 | static void dgnc_tty_wait_until_sent(struct tty_struct *tty, int timeout) | |
2305 | { | |
03425f55 | 2306 | struct dgnc_board *bd; |
0b99d589 LL |
2307 | struct channel_t *ch; |
2308 | struct un_t *un; | |
2309 | int rc; | |
2310 | ||
2311 | if (!tty || tty->magic != TTY_MAGIC) | |
2312 | return; | |
2313 | ||
2314 | un = tty->driver_data; | |
2315 | if (!un || un->magic != DGNC_UNIT_MAGIC) | |
2316 | return; | |
2317 | ||
2318 | ch = un->un_ch; | |
2319 | if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) | |
2320 | return; | |
2321 | ||
2322 | bd = ch->ch_bd; | |
2323 | if (!bd || bd->magic != DGNC_BOARD_MAGIC) | |
2324 | return; | |
2325 | ||
2326 | rc = bd->bd_ops->drain(tty, 0); | |
2327 | if (rc) { | |
2328 | DPR_IOCTL(("dgnc_tty_ioctl - bad return: %d ", rc)); | |
2329 | return; | |
2330 | } | |
2331 | return; | |
8b07d521 | 2332 | } |
0b99d589 LL |
2333 | |
2334 | ||
2335 | /* | |
2336 | * dgnc_send_xchar() | |
2337 | * | |
2338 | * send a high priority character, called by ld. | |
2339 | */ | |
2340 | static void dgnc_tty_send_xchar(struct tty_struct *tty, char c) | |
2341 | { | |
03425f55 | 2342 | struct dgnc_board *bd; |
0b99d589 LL |
2343 | struct channel_t *ch; |
2344 | struct un_t *un; | |
2345 | ulong lock_flags; | |
2346 | ||
2347 | if (!tty || tty->magic != TTY_MAGIC) | |
2348 | return; | |
2349 | ||
2350 | un = tty->driver_data; | |
2351 | if (!un || un->magic != DGNC_UNIT_MAGIC) | |
2352 | return; | |
2353 | ||
2354 | ch = un->un_ch; | |
2355 | if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) | |
2356 | return; | |
2357 | ||
2358 | bd = ch->ch_bd; | |
2359 | if (!bd || bd->magic != DGNC_BOARD_MAGIC) | |
2360 | return; | |
2361 | ||
2362 | DPR_IOCTL(("dgnc_tty_send_xchar start\n")); | |
2363 | printk("dgnc_tty_send_xchar start\n"); | |
2364 | ||
2365 | DGNC_LOCK(ch->ch_lock, lock_flags); | |
2366 | bd->bd_ops->send_immediate_char(ch, c); | |
2367 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
2368 | ||
2369 | DPR_IOCTL(("dgnc_tty_send_xchar finish\n")); | |
2370 | printk("dgnc_tty_send_xchar finish\n"); | |
2371 | return; | |
8b07d521 | 2372 | } |
0b99d589 LL |
2373 | |
2374 | ||
2375 | ||
2376 | ||
2377 | /* | |
2378 | * Return modem signals to ld. | |
2379 | */ | |
2380 | static inline int dgnc_get_mstat(struct channel_t *ch) | |
2381 | { | |
2382 | unsigned char mstat; | |
2383 | int result = -EIO; | |
2384 | ulong lock_flags; | |
2385 | ||
2386 | DPR_IOCTL(("dgnc_getmstat start\n")); | |
2387 | ||
2388 | if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) | |
8f90ef80 | 2389 | return -ENXIO; |
0b99d589 LL |
2390 | |
2391 | DGNC_LOCK(ch->ch_lock, lock_flags); | |
2392 | ||
2393 | mstat = (ch->ch_mostat | ch->ch_mistat); | |
2394 | ||
2395 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
2396 | ||
2397 | result = 0; | |
2398 | ||
2399 | if (mstat & UART_MCR_DTR) | |
2400 | result |= TIOCM_DTR; | |
2401 | if (mstat & UART_MCR_RTS) | |
2402 | result |= TIOCM_RTS; | |
2403 | if (mstat & UART_MSR_CTS) | |
2404 | result |= TIOCM_CTS; | |
2405 | if (mstat & UART_MSR_DSR) | |
2406 | result |= TIOCM_DSR; | |
2407 | if (mstat & UART_MSR_RI) | |
2408 | result |= TIOCM_RI; | |
2409 | if (mstat & UART_MSR_DCD) | |
2410 | result |= TIOCM_CD; | |
2411 | ||
2412 | DPR_IOCTL(("dgnc_getmstat finish\n")); | |
2413 | ||
8f90ef80 | 2414 | return result; |
0b99d589 LL |
2415 | } |
2416 | ||
2417 | ||
2418 | ||
2419 | /* | |
2420 | * Return modem signals to ld. | |
2421 | */ | |
2422 | static int dgnc_get_modem_info(struct channel_t *ch, unsigned int __user *value) | |
2423 | { | |
2424 | int result; | |
2425 | int rc; | |
2426 | ||
2427 | DPR_IOCTL(("dgnc_get_modem_info start\n")); | |
2428 | ||
2429 | if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) | |
8f90ef80 | 2430 | return -ENXIO; |
0b99d589 LL |
2431 | |
2432 | result = dgnc_get_mstat(ch); | |
2433 | ||
2434 | if (result < 0) | |
8f90ef80 | 2435 | return -ENXIO; |
0b99d589 LL |
2436 | |
2437 | rc = put_user(result, value); | |
2438 | ||
2439 | DPR_IOCTL(("dgnc_get_modem_info finish\n")); | |
8f90ef80 | 2440 | return rc; |
0b99d589 LL |
2441 | } |
2442 | ||
2443 | ||
2444 | /* | |
2445 | * dgnc_set_modem_info() | |
2446 | * | |
2447 | * Set modem signals, called by ld. | |
2448 | */ | |
2449 | static int dgnc_set_modem_info(struct tty_struct *tty, unsigned int command, unsigned int __user *value) | |
2450 | { | |
03425f55 | 2451 | struct dgnc_board *bd; |
0b99d589 LL |
2452 | struct channel_t *ch; |
2453 | struct un_t *un; | |
2454 | int ret = -ENXIO; | |
2455 | unsigned int arg = 0; | |
2456 | ulong lock_flags; | |
2457 | ||
2458 | if (!tty || tty->magic != TTY_MAGIC) | |
2459 | return ret; | |
2460 | ||
2461 | un = tty->driver_data; | |
2462 | if (!un || un->magic != DGNC_UNIT_MAGIC) | |
2463 | return ret; | |
2464 | ||
2465 | ch = un->un_ch; | |
2466 | if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) | |
2467 | return ret; | |
2468 | ||
2469 | bd = ch->ch_bd; | |
2470 | if (!bd || bd->magic != DGNC_BOARD_MAGIC) | |
2471 | return ret; | |
2472 | ||
2473 | ret = 0; | |
2474 | ||
2475 | DPR_IOCTL(("dgnc_set_modem_info() start\n")); | |
2476 | ||
2477 | ret = get_user(arg, value); | |
2478 | if (ret) | |
8f90ef80 | 2479 | return ret; |
0b99d589 LL |
2480 | |
2481 | switch (command) { | |
2482 | case TIOCMBIS: | |
50667c67 | 2483 | if (arg & TIOCM_RTS) |
0b99d589 | 2484 | ch->ch_mostat |= UART_MCR_RTS; |
0b99d589 | 2485 | |
50667c67 | 2486 | if (arg & TIOCM_DTR) |
0b99d589 | 2487 | ch->ch_mostat |= UART_MCR_DTR; |
0b99d589 LL |
2488 | |
2489 | break; | |
2490 | ||
2491 | case TIOCMBIC: | |
50667c67 | 2492 | if (arg & TIOCM_RTS) |
0b99d589 | 2493 | ch->ch_mostat &= ~(UART_MCR_RTS); |
0b99d589 | 2494 | |
50667c67 | 2495 | if (arg & TIOCM_DTR) |
0b99d589 | 2496 | ch->ch_mostat &= ~(UART_MCR_DTR); |
0b99d589 LL |
2497 | |
2498 | break; | |
2499 | ||
90d2a471 | 2500 | case TIOCMSET: |
0b99d589 | 2501 | |
50667c67 | 2502 | if (arg & TIOCM_RTS) |
0b99d589 | 2503 | ch->ch_mostat |= UART_MCR_RTS; |
50667c67 | 2504 | else |
0b99d589 | 2505 | ch->ch_mostat &= ~(UART_MCR_RTS); |
0b99d589 | 2506 | |
50667c67 | 2507 | if (arg & TIOCM_DTR) |
0b99d589 | 2508 | ch->ch_mostat |= UART_MCR_DTR; |
50667c67 | 2509 | else |
0b99d589 | 2510 | ch->ch_mostat &= ~(UART_MCR_DTR); |
0b99d589 LL |
2511 | |
2512 | break; | |
2513 | ||
2514 | default: | |
8f90ef80 | 2515 | return -EINVAL; |
0b99d589 LL |
2516 | } |
2517 | ||
2518 | DGNC_LOCK(ch->ch_lock, lock_flags); | |
2519 | ||
2520 | ch->ch_bd->bd_ops->assert_modem_signals(ch); | |
2521 | ||
2522 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
2523 | ||
2524 | DPR_IOCTL(("dgnc_set_modem_info finish\n")); | |
2525 | ||
8f90ef80 | 2526 | return 0; |
0b99d589 LL |
2527 | } |
2528 | ||
2529 | ||
2530 | /* | |
8b07d521 | 2531 | * dgnc_tty_digigeta() |
0b99d589 LL |
2532 | * |
2533 | * Ioctl to get the information for ditty. | |
2534 | * | |
2535 | * | |
2536 | * | |
2537 | */ | |
2538 | static int dgnc_tty_digigeta(struct tty_struct *tty, struct digi_t __user *retinfo) | |
2539 | { | |
2540 | struct channel_t *ch; | |
2541 | struct un_t *un; | |
2542 | struct digi_t tmp; | |
2543 | ulong lock_flags; | |
2544 | ||
2545 | if (!retinfo) | |
8f90ef80 | 2546 | return -EFAULT; |
0b99d589 LL |
2547 | |
2548 | if (!tty || tty->magic != TTY_MAGIC) | |
8f90ef80 | 2549 | return -EFAULT; |
0b99d589 LL |
2550 | |
2551 | un = tty->driver_data; | |
2552 | if (!un || un->magic != DGNC_UNIT_MAGIC) | |
8f90ef80 | 2553 | return -EFAULT; |
0b99d589 LL |
2554 | |
2555 | ch = un->un_ch; | |
2556 | if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) | |
8f90ef80 | 2557 | return -EFAULT; |
0b99d589 LL |
2558 | |
2559 | memset(&tmp, 0, sizeof(tmp)); | |
2560 | ||
2561 | DGNC_LOCK(ch->ch_lock, lock_flags); | |
2562 | memcpy(&tmp, &ch->ch_digi, sizeof(tmp)); | |
2563 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
2564 | ||
2565 | if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) | |
8f90ef80 | 2566 | return -EFAULT; |
0b99d589 | 2567 | |
8f90ef80 | 2568 | return 0; |
0b99d589 LL |
2569 | } |
2570 | ||
2571 | ||
2572 | /* | |
8b07d521 | 2573 | * dgnc_tty_digiseta() |
0b99d589 LL |
2574 | * |
2575 | * Ioctl to set the information for ditty. | |
2576 | * | |
2577 | * | |
2578 | * | |
2579 | */ | |
2580 | static int dgnc_tty_digiseta(struct tty_struct *tty, struct digi_t __user *new_info) | |
2581 | { | |
03425f55 | 2582 | struct dgnc_board *bd; |
0b99d589 LL |
2583 | struct channel_t *ch; |
2584 | struct un_t *un; | |
2585 | struct digi_t new_digi; | |
2586 | ulong lock_flags; | |
2587 | ||
2588 | DPR_IOCTL(("DIGI_SETA start\n")); | |
2589 | ||
2590 | if (!tty || tty->magic != TTY_MAGIC) | |
8f90ef80 | 2591 | return -EFAULT; |
0b99d589 LL |
2592 | |
2593 | un = tty->driver_data; | |
2594 | if (!un || un->magic != DGNC_UNIT_MAGIC) | |
8f90ef80 | 2595 | return -EFAULT; |
0b99d589 LL |
2596 | |
2597 | ch = un->un_ch; | |
2598 | if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) | |
8f90ef80 | 2599 | return -EFAULT; |
0b99d589 LL |
2600 | |
2601 | bd = ch->ch_bd; | |
2602 | if (!bd || bd->magic != DGNC_BOARD_MAGIC) | |
8f90ef80 | 2603 | return -EFAULT; |
0b99d589 | 2604 | |
a07bf39a | 2605 | if (copy_from_user(&new_digi, new_info, sizeof(new_digi))) { |
0b99d589 | 2606 | DPR_IOCTL(("DIGI_SETA failed copy_from_user\n")); |
8f90ef80 | 2607 | return -EFAULT; |
0b99d589 LL |
2608 | } |
2609 | ||
2610 | DGNC_LOCK(ch->ch_lock, lock_flags); | |
2611 | ||
2612 | /* | |
2613 | * Handle transistions to and from RTS Toggle. | |
2614 | */ | |
2615 | if (!(ch->ch_digi.digi_flags & DIGI_RTS_TOGGLE) && (new_digi.digi_flags & DIGI_RTS_TOGGLE)) | |
2616 | ch->ch_mostat &= ~(UART_MCR_RTS); | |
2617 | if ((ch->ch_digi.digi_flags & DIGI_RTS_TOGGLE) && !(new_digi.digi_flags & DIGI_RTS_TOGGLE)) | |
2618 | ch->ch_mostat |= (UART_MCR_RTS); | |
2619 | ||
2620 | /* | |
2621 | * Handle transistions to and from DTR Toggle. | |
2622 | */ | |
2623 | if (!(ch->ch_digi.digi_flags & DIGI_DTR_TOGGLE) && (new_digi.digi_flags & DIGI_DTR_TOGGLE)) | |
2624 | ch->ch_mostat &= ~(UART_MCR_DTR); | |
2625 | if ((ch->ch_digi.digi_flags & DIGI_DTR_TOGGLE) && !(new_digi.digi_flags & DIGI_DTR_TOGGLE)) | |
2626 | ch->ch_mostat |= (UART_MCR_DTR); | |
2627 | ||
a07bf39a | 2628 | memcpy(&ch->ch_digi, &new_digi, sizeof(new_digi)); |
0b99d589 | 2629 | |
8b07d521 | 2630 | if (ch->ch_digi.digi_maxcps < 1) |
0b99d589 LL |
2631 | ch->ch_digi.digi_maxcps = 1; |
2632 | ||
8b07d521 | 2633 | if (ch->ch_digi.digi_maxcps > 10000) |
0b99d589 LL |
2634 | ch->ch_digi.digi_maxcps = 10000; |
2635 | ||
2636 | if (ch->ch_digi.digi_bufsize < 10) | |
2637 | ch->ch_digi.digi_bufsize = 10; | |
2638 | ||
2639 | if (ch->ch_digi.digi_maxchar < 1) | |
2640 | ch->ch_digi.digi_maxchar = 1; | |
2641 | ||
2642 | if (ch->ch_digi.digi_maxchar > ch->ch_digi.digi_bufsize) | |
2643 | ch->ch_digi.digi_maxchar = ch->ch_digi.digi_bufsize; | |
2644 | ||
2645 | if (ch->ch_digi.digi_onlen > DIGI_PLEN) | |
2646 | ch->ch_digi.digi_onlen = DIGI_PLEN; | |
2647 | ||
2648 | if (ch->ch_digi.digi_offlen > DIGI_PLEN) | |
2649 | ch->ch_digi.digi_offlen = DIGI_PLEN; | |
2650 | ||
2651 | ch->ch_bd->bd_ops->param(tty); | |
2652 | ||
2653 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
2654 | ||
2655 | DPR_IOCTL(("DIGI_SETA finish\n")); | |
2656 | ||
8f90ef80 | 2657 | return 0; |
0b99d589 LL |
2658 | } |
2659 | ||
2660 | ||
2661 | /* | |
2662 | * dgnc_set_termios() | |
2663 | */ | |
2664 | static void dgnc_tty_set_termios(struct tty_struct *tty, struct ktermios *old_termios) | |
2665 | { | |
03425f55 | 2666 | struct dgnc_board *bd; |
0b99d589 LL |
2667 | struct channel_t *ch; |
2668 | struct un_t *un; | |
2669 | unsigned long lock_flags; | |
2670 | ||
2671 | if (!tty || tty->magic != TTY_MAGIC) | |
2672 | return; | |
2673 | ||
2674 | un = tty->driver_data; | |
2675 | if (!un || un->magic != DGNC_UNIT_MAGIC) | |
2676 | return; | |
2677 | ||
2678 | ch = un->un_ch; | |
2679 | if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) | |
2680 | return; | |
2681 | ||
2682 | bd = ch->ch_bd; | |
2683 | if (!bd || bd->magic != DGNC_BOARD_MAGIC) | |
2684 | return; | |
2685 | ||
2686 | DGNC_LOCK(ch->ch_lock, lock_flags); | |
2687 | ||
22e3de76 LL |
2688 | ch->ch_c_cflag = tty->termios.c_cflag; |
2689 | ch->ch_c_iflag = tty->termios.c_iflag; | |
2690 | ch->ch_c_oflag = tty->termios.c_oflag; | |
2691 | ch->ch_c_lflag = tty->termios.c_lflag; | |
2692 | ch->ch_startc = tty->termios.c_cc[VSTART]; | |
2693 | ch->ch_stopc = tty->termios.c_cc[VSTOP]; | |
0b99d589 LL |
2694 | |
2695 | ch->ch_bd->bd_ops->param(tty); | |
2696 | dgnc_carrier(ch); | |
2697 | ||
2698 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
2699 | } | |
2700 | ||
2701 | ||
2702 | static void dgnc_tty_throttle(struct tty_struct *tty) | |
2703 | { | |
2704 | struct channel_t *ch; | |
2705 | struct un_t *un; | |
2706 | ulong lock_flags = 0; | |
2707 | ||
2708 | if (!tty || tty->magic != TTY_MAGIC) | |
2709 | return; | |
2710 | ||
2711 | un = tty->driver_data; | |
2712 | if (!un || un->magic != DGNC_UNIT_MAGIC) | |
2713 | return; | |
8b07d521 | 2714 | |
90d2a471 LL |
2715 | ch = un->un_ch; |
2716 | if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) | |
2717 | return; | |
0b99d589 LL |
2718 | |
2719 | DPR_IOCTL(("dgnc_tty_throttle start\n")); | |
2720 | ||
2721 | DGNC_LOCK(ch->ch_lock, lock_flags); | |
2722 | ||
2723 | ch->ch_flags |= (CH_FORCED_STOPI); | |
2724 | ||
2725 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
2726 | ||
2727 | DPR_IOCTL(("dgnc_tty_throttle finish\n")); | |
2728 | } | |
2729 | ||
2730 | ||
2731 | static void dgnc_tty_unthrottle(struct tty_struct *tty) | |
2732 | { | |
2733 | struct channel_t *ch; | |
2734 | struct un_t *un; | |
2735 | ulong lock_flags; | |
2736 | ||
2737 | if (!tty || tty->magic != TTY_MAGIC) | |
2738 | return; | |
2739 | ||
2740 | un = tty->driver_data; | |
2741 | if (!un || un->magic != DGNC_UNIT_MAGIC) | |
2742 | return; | |
8b07d521 | 2743 | |
90d2a471 LL |
2744 | ch = un->un_ch; |
2745 | if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) | |
2746 | return; | |
0b99d589 LL |
2747 | |
2748 | DPR_IOCTL(("dgnc_tty_unthrottle start\n")); | |
2749 | ||
2750 | DGNC_LOCK(ch->ch_lock, lock_flags); | |
2751 | ||
2752 | ch->ch_flags &= ~(CH_FORCED_STOPI); | |
2753 | ||
2754 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
2755 | ||
2756 | DPR_IOCTL(("dgnc_tty_unthrottle finish\n")); | |
2757 | } | |
2758 | ||
2759 | ||
2760 | static void dgnc_tty_start(struct tty_struct *tty) | |
2761 | { | |
03425f55 | 2762 | struct dgnc_board *bd; |
0b99d589 LL |
2763 | struct channel_t *ch; |
2764 | struct un_t *un; | |
2765 | ulong lock_flags; | |
2766 | ||
2767 | if (!tty || tty->magic != TTY_MAGIC) | |
2768 | return; | |
2769 | ||
2770 | un = tty->driver_data; | |
2771 | if (!un || un->magic != DGNC_UNIT_MAGIC) | |
2772 | return; | |
8b07d521 | 2773 | |
90d2a471 LL |
2774 | ch = un->un_ch; |
2775 | if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) | |
2776 | return; | |
0b99d589 LL |
2777 | |
2778 | bd = ch->ch_bd; | |
2779 | if (!bd || bd->magic != DGNC_BOARD_MAGIC) | |
2780 | return; | |
2781 | ||
2782 | DPR_IOCTL(("dgcn_tty_start start\n")); | |
2783 | ||
2784 | DGNC_LOCK(ch->ch_lock, lock_flags); | |
2785 | ||
2786 | ch->ch_flags &= ~(CH_FORCED_STOP); | |
2787 | ||
2788 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
2789 | ||
2790 | DPR_IOCTL(("dgnc_tty_start finish\n")); | |
2791 | } | |
2792 | ||
2793 | ||
2794 | static void dgnc_tty_stop(struct tty_struct *tty) | |
2795 | { | |
03425f55 | 2796 | struct dgnc_board *bd; |
0b99d589 LL |
2797 | struct channel_t *ch; |
2798 | struct un_t *un; | |
2799 | ulong lock_flags; | |
2800 | ||
2801 | if (!tty || tty->magic != TTY_MAGIC) | |
2802 | return; | |
2803 | ||
2804 | un = tty->driver_data; | |
2805 | if (!un || un->magic != DGNC_UNIT_MAGIC) | |
2806 | return; | |
8b07d521 | 2807 | |
90d2a471 LL |
2808 | ch = un->un_ch; |
2809 | if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) | |
2810 | return; | |
0b99d589 LL |
2811 | |
2812 | bd = ch->ch_bd; | |
2813 | if (!bd || bd->magic != DGNC_BOARD_MAGIC) | |
2814 | return; | |
2815 | ||
2816 | DPR_IOCTL(("dgnc_tty_stop start\n")); | |
2817 | ||
2818 | DGNC_LOCK(ch->ch_lock, lock_flags); | |
2819 | ||
2820 | ch->ch_flags |= (CH_FORCED_STOP); | |
2821 | ||
2822 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
2823 | ||
2824 | DPR_IOCTL(("dgnc_tty_stop finish\n")); | |
2825 | } | |
2826 | ||
2827 | ||
8b07d521 | 2828 | /* |
0b99d589 LL |
2829 | * dgnc_tty_flush_chars() |
2830 | * | |
2831 | * Flush the cook buffer | |
2832 | * | |
2833 | * Note to self, and any other poor souls who venture here: | |
2834 | * | |
2835 | * flush in this case DOES NOT mean dispose of the data. | |
2836 | * instead, it means "stop buffering and send it if you | |
2837 | * haven't already." Just guess how I figured that out... SRW 2-Jun-98 | |
2838 | * | |
2839 | * It is also always called in interrupt context - JAR 8-Sept-99 | |
2840 | */ | |
2841 | static void dgnc_tty_flush_chars(struct tty_struct *tty) | |
2842 | { | |
03425f55 | 2843 | struct dgnc_board *bd; |
0b99d589 LL |
2844 | struct channel_t *ch; |
2845 | struct un_t *un; | |
2846 | ulong lock_flags; | |
2847 | ||
2848 | if (!tty || tty->magic != TTY_MAGIC) | |
2849 | return; | |
2850 | ||
2851 | un = tty->driver_data; | |
2852 | if (!un || un->magic != DGNC_UNIT_MAGIC) | |
2853 | return; | |
8b07d521 | 2854 | |
90d2a471 LL |
2855 | ch = un->un_ch; |
2856 | if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) | |
2857 | return; | |
0b99d589 LL |
2858 | |
2859 | bd = ch->ch_bd; | |
2860 | if (!bd || bd->magic != DGNC_BOARD_MAGIC) | |
2861 | return; | |
2862 | ||
2863 | DPR_IOCTL(("dgnc_tty_flush_chars start\n")); | |
2864 | ||
2865 | DGNC_LOCK(ch->ch_lock, lock_flags); | |
2866 | ||
2867 | /* Do something maybe here */ | |
2868 | ||
2869 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
2870 | ||
2871 | DPR_IOCTL(("dgnc_tty_flush_chars finish\n")); | |
2872 | } | |
2873 | ||
2874 | ||
2875 | ||
2876 | /* | |
2877 | * dgnc_tty_flush_buffer() | |
8b07d521 | 2878 | * |
0b99d589 LL |
2879 | * Flush Tx buffer (make in == out) |
2880 | */ | |
2881 | static void dgnc_tty_flush_buffer(struct tty_struct *tty) | |
2882 | { | |
2883 | struct channel_t *ch; | |
2884 | struct un_t *un; | |
2885 | ulong lock_flags; | |
2886 | ||
2887 | if (!tty || tty->magic != TTY_MAGIC) | |
2888 | return; | |
2889 | ||
2890 | un = tty->driver_data; | |
2891 | if (!un || un->magic != DGNC_UNIT_MAGIC) | |
2892 | return; | |
8b07d521 | 2893 | |
90d2a471 LL |
2894 | ch = un->un_ch; |
2895 | if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) | |
2896 | return; | |
0b99d589 LL |
2897 | |
2898 | DPR_IOCTL(("dgnc_tty_flush_buffer on port: %d start\n", ch->ch_portnum)); | |
2899 | ||
2900 | DGNC_LOCK(ch->ch_lock, lock_flags); | |
2901 | ||
2902 | ch->ch_flags &= ~CH_STOP; | |
2903 | ||
2904 | /* Flush our write queue */ | |
2905 | ch->ch_w_head = ch->ch_w_tail; | |
2906 | ||
2907 | /* Flush UARTs transmit FIFO */ | |
2908 | ch->ch_bd->bd_ops->flush_uart_write(ch); | |
2909 | ||
2910 | if (ch->ch_tun.un_flags & (UN_LOW|UN_EMPTY)) { | |
2911 | ch->ch_tun.un_flags &= ~(UN_LOW|UN_EMPTY); | |
2912 | wake_up_interruptible(&ch->ch_tun.un_flags_wait); | |
2913 | } | |
2914 | if (ch->ch_pun.un_flags & (UN_LOW|UN_EMPTY)) { | |
2915 | ch->ch_pun.un_flags &= ~(UN_LOW|UN_EMPTY); | |
2916 | wake_up_interruptible(&ch->ch_pun.un_flags_wait); | |
2917 | } | |
2918 | ||
2919 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
2920 | ||
2921 | DPR_IOCTL(("dgnc_tty_flush_buffer finish\n")); | |
2922 | } | |
2923 | ||
2924 | ||
2925 | ||
2926 | /***************************************************************************** | |
2927 | * | |
2928 | * The IOCTL function and all of its helpers | |
2929 | * | |
2930 | *****************************************************************************/ | |
8b07d521 | 2931 | |
0b99d589 LL |
2932 | /* |
2933 | * dgnc_tty_ioctl() | |
2934 | * | |
2935 | * The usual assortment of ioctl's | |
2936 | */ | |
a31cefa2 | 2937 | static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd, |
0b99d589 LL |
2938 | unsigned long arg) |
2939 | { | |
03425f55 | 2940 | struct dgnc_board *bd; |
0b99d589 LL |
2941 | struct channel_t *ch; |
2942 | struct un_t *un; | |
2943 | int rc; | |
2944 | ulong lock_flags; | |
2945 | void __user *uarg = (void __user *) arg; | |
2946 | ||
2947 | if (!tty || tty->magic != TTY_MAGIC) | |
8f90ef80 | 2948 | return -ENODEV; |
0b99d589 LL |
2949 | |
2950 | un = tty->driver_data; | |
2951 | if (!un || un->magic != DGNC_UNIT_MAGIC) | |
8f90ef80 | 2952 | return -ENODEV; |
0b99d589 LL |
2953 | |
2954 | ch = un->un_ch; | |
2955 | if (!ch || ch->magic != DGNC_CHANNEL_MAGIC) | |
8f90ef80 | 2956 | return -ENODEV; |
0b99d589 LL |
2957 | |
2958 | bd = ch->ch_bd; | |
2959 | if (!bd || bd->magic != DGNC_BOARD_MAGIC) | |
8f90ef80 | 2960 | return -ENODEV; |
0b99d589 | 2961 | |
8b07d521 | 2962 | DPR_IOCTL(("dgnc_tty_ioctl start on port %d - cmd %s (%x), arg %lx\n", |
0b99d589 LL |
2963 | ch->ch_portnum, dgnc_ioctl_name(cmd), cmd, arg)); |
2964 | ||
2965 | DGNC_LOCK(ch->ch_lock, lock_flags); | |
2966 | ||
2967 | if (un->un_open_count <= 0) { | |
2968 | DPR_BASIC(("dgnc_tty_ioctl - unit not open.\n")); | |
2969 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
8f90ef80 | 2970 | return -EIO; |
0b99d589 LL |
2971 | } |
2972 | ||
2973 | switch (cmd) { | |
2974 | ||
2975 | /* Here are all the standard ioctl's that we MUST implement */ | |
2976 | ||
2977 | case TCSBRK: | |
2978 | /* | |
8b07d521 | 2979 | * TCSBRK is SVID version: non-zero arg --> no break |
0b99d589 LL |
2980 | * this behaviour is exploited by tcdrain(). |
2981 | * | |
2982 | * According to POSIX.1 spec (7.2.2.1.2) breaks should be | |
2983 | * between 0.25 and 0.5 seconds so we'll ask for something | |
2984 | * in the middle: 0.375 seconds. | |
2985 | */ | |
2986 | rc = tty_check_change(tty); | |
2987 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
50667c67 | 2988 | if (rc) |
8f90ef80 | 2989 | return rc; |
0b99d589 LL |
2990 | |
2991 | rc = ch->ch_bd->bd_ops->drain(tty, 0); | |
2992 | ||
2993 | if (rc) { | |
2994 | DPR_IOCTL(("dgnc_tty_ioctl - bad return: %d ", rc)); | |
8f90ef80 | 2995 | return -EINTR; |
0b99d589 LL |
2996 | } |
2997 | ||
2998 | DGNC_LOCK(ch->ch_lock, lock_flags); | |
2999 | ||
a82477c3 | 3000 | if (((cmd == TCSBRK) && (!arg)) || (cmd == TCSBRKP)) { |
0b99d589 LL |
3001 | ch->ch_bd->bd_ops->send_break(ch, 250); |
3002 | } | |
3003 | ||
3004 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
3005 | ||
8b07d521 | 3006 | DPR_IOCTL(("dgnc_tty_ioctl finish on port %d - cmd %s (%x), arg %lx\n", |
0b99d589 LL |
3007 | ch->ch_portnum, dgnc_ioctl_name(cmd), cmd, arg)); |
3008 | ||
8f90ef80 | 3009 | return 0; |
0b99d589 LL |
3010 | |
3011 | ||
3012 | case TCSBRKP: | |
90d2a471 | 3013 | /* support for POSIX tcsendbreak() |
0b99d589 LL |
3014 | * According to POSIX.1 spec (7.2.2.1.2) breaks should be |
3015 | * between 0.25 and 0.5 seconds so we'll ask for something | |
3016 | * in the middle: 0.375 seconds. | |
3017 | */ | |
3018 | rc = tty_check_change(tty); | |
3019 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
50667c67 | 3020 | if (rc) |
8f90ef80 | 3021 | return rc; |
0b99d589 LL |
3022 | |
3023 | rc = ch->ch_bd->bd_ops->drain(tty, 0); | |
3024 | if (rc) { | |
3025 | DPR_IOCTL(("dgnc_tty_ioctl - bad return: %d ", rc)); | |
8f90ef80 | 3026 | return -EINTR; |
0b99d589 LL |
3027 | } |
3028 | ||
3029 | DGNC_LOCK(ch->ch_lock, lock_flags); | |
3030 | ||
3031 | ch->ch_bd->bd_ops->send_break(ch, 250); | |
3032 | ||
3033 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
3034 | ||
8b07d521 | 3035 | DPR_IOCTL(("dgnc_tty_ioctl finish on port %d - cmd %s (%x), arg %lx\n", |
0b99d589 LL |
3036 | ch->ch_portnum, dgnc_ioctl_name(cmd), cmd, arg)); |
3037 | ||
8f90ef80 | 3038 | return 0; |
0b99d589 LL |
3039 | |
3040 | case TIOCSBRK: | |
3041 | rc = tty_check_change(tty); | |
3042 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
50667c67 | 3043 | if (rc) |
8f90ef80 | 3044 | return rc; |
0b99d589 LL |
3045 | |
3046 | rc = ch->ch_bd->bd_ops->drain(tty, 0); | |
3047 | if (rc) { | |
3048 | DPR_IOCTL(("dgnc_tty_ioctl - bad return: %d ", rc)); | |
8f90ef80 | 3049 | return -EINTR; |
0b99d589 LL |
3050 | } |
3051 | ||
3052 | DGNC_LOCK(ch->ch_lock, lock_flags); | |
3053 | ||
3054 | ch->ch_bd->bd_ops->send_break(ch, 250); | |
3055 | ||
3056 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
3057 | ||
8b07d521 | 3058 | DPR_IOCTL(("dgnc_tty_ioctl finish on port %d - cmd %s (%x), arg %lx\n", |
0b99d589 LL |
3059 | ch->ch_portnum, dgnc_ioctl_name(cmd), cmd, arg)); |
3060 | ||
8f90ef80 | 3061 | return 0; |
0b99d589 LL |
3062 | |
3063 | case TIOCCBRK: | |
3064 | /* Do Nothing */ | |
3065 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
3066 | return 0; | |
3067 | ||
3068 | case TIOCGSOFTCAR: | |
3069 | ||
3070 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
3071 | ||
3072 | rc = put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *) arg); | |
8f90ef80 | 3073 | return rc; |
0b99d589 LL |
3074 | |
3075 | case TIOCSSOFTCAR: | |
3076 | ||
3077 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
3078 | rc = get_user(arg, (unsigned long __user *) arg); | |
3079 | if (rc) | |
8f90ef80 | 3080 | return rc; |
0b99d589 LL |
3081 | |
3082 | DGNC_LOCK(ch->ch_lock, lock_flags); | |
22e3de76 | 3083 | tty->termios.c_cflag = ((tty->termios.c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0)); |
0b99d589 LL |
3084 | ch->ch_bd->bd_ops->param(tty); |
3085 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
3086 | ||
8f90ef80 | 3087 | return 0; |
8b07d521 | 3088 | |
0b99d589 LL |
3089 | case TIOCMGET: |
3090 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
8f90ef80 | 3091 | return dgnc_get_modem_info(ch, uarg); |
0b99d589 LL |
3092 | |
3093 | case TIOCMBIS: | |
3094 | case TIOCMBIC: | |
3095 | case TIOCMSET: | |
3096 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
8f90ef80 | 3097 | return dgnc_set_modem_info(tty, cmd, uarg); |
0b99d589 LL |
3098 | |
3099 | /* | |
3100 | * Here are any additional ioctl's that we want to implement | |
3101 | */ | |
8b07d521 LL |
3102 | |
3103 | case TCFLSH: | |
0b99d589 LL |
3104 | /* |
3105 | * The linux tty driver doesn't have a flush | |
3106 | * input routine for the driver, assuming all backed | |
3107 | * up data is in the line disc. buffers. However, | |
3108 | * we all know that's not the case. Here, we | |
3109 | * act on the ioctl, but then lie and say we didn't | |
3110 | * so the line discipline will process the flush | |
3111 | * also. | |
8b07d521 | 3112 | */ |
0b99d589 LL |
3113 | rc = tty_check_change(tty); |
3114 | if (rc) { | |
3115 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
8f90ef80 | 3116 | return rc; |
0b99d589 LL |
3117 | } |
3118 | ||
3119 | if ((arg == TCIFLUSH) || (arg == TCIOFLUSH)) { | |
3120 | ch->ch_r_head = ch->ch_r_tail; | |
3121 | ch->ch_bd->bd_ops->flush_uart_read(ch); | |
3122 | /* Force queue flow control to be released, if needed */ | |
3123 | dgnc_check_queue_flow_control(ch); | |
3124 | } | |
3125 | ||
3126 | if ((arg == TCOFLUSH) || (arg == TCIOFLUSH)) { | |
3127 | if (!(un->un_type == DGNC_PRINT)) { | |
3128 | ch->ch_w_head = ch->ch_w_tail; | |
3129 | ch->ch_bd->bd_ops->flush_uart_write(ch); | |
3130 | ||
3131 | if (ch->ch_tun.un_flags & (UN_LOW|UN_EMPTY)) { | |
3132 | ch->ch_tun.un_flags &= ~(UN_LOW|UN_EMPTY); | |
3133 | wake_up_interruptible(&ch->ch_tun.un_flags_wait); | |
3134 | } | |
3135 | ||
3136 | if (ch->ch_pun.un_flags & (UN_LOW|UN_EMPTY)) { | |
3137 | ch->ch_pun.un_flags &= ~(UN_LOW|UN_EMPTY); | |
3138 | wake_up_interruptible(&ch->ch_pun.un_flags_wait); | |
3139 | } | |
3140 | ||
3141 | } | |
3142 | } | |
3143 | ||
8b07d521 | 3144 | /* pretend we didn't recognize this IOCTL */ |
0b99d589 | 3145 | DGNC_UNLOCK(ch->ch_lock, lock_flags); |
8f90ef80 | 3146 | return -ENOIOCTLCMD; |
0b99d589 LL |
3147 | case TCSETSF: |
3148 | case TCSETSW: | |
3149 | /* | |
3150 | * The linux tty driver doesn't have a flush | |
3151 | * input routine for the driver, assuming all backed | |
3152 | * up data is in the line disc. buffers. However, | |
3153 | * we all know that's not the case. Here, we | |
3154 | * act on the ioctl, but then lie and say we didn't | |
3155 | * so the line discipline will process the flush | |
3156 | * also. | |
3157 | */ | |
3158 | if (cmd == TCSETSF) { | |
3159 | /* flush rx */ | |
3160 | ch->ch_flags &= ~CH_STOP; | |
3161 | ch->ch_r_head = ch->ch_r_tail; | |
3162 | ch->ch_bd->bd_ops->flush_uart_read(ch); | |
3163 | /* Force queue flow control to be released, if needed */ | |
3164 | dgnc_check_queue_flow_control(ch); | |
3165 | } | |
3166 | ||
3167 | /* now wait for all the output to drain */ | |
3168 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
3169 | rc = ch->ch_bd->bd_ops->drain(tty, 0); | |
3170 | if (rc) { | |
3171 | DPR_IOCTL(("dgnc_tty_ioctl - bad return: %d\n", rc)); | |
8f90ef80 | 3172 | return -EINTR; |
0b99d589 LL |
3173 | } |
3174 | ||
8b07d521 | 3175 | DPR_IOCTL(("dgnc_tty_ioctl finish on port %d - cmd %s (%x), arg %lx\n", |
0b99d589 LL |
3176 | ch->ch_portnum, dgnc_ioctl_name(cmd), cmd, arg)); |
3177 | ||
3178 | /* pretend we didn't recognize this */ | |
8f90ef80 | 3179 | return -ENOIOCTLCMD; |
0b99d589 LL |
3180 | |
3181 | case TCSETAW: | |
3182 | ||
3183 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
3184 | rc = ch->ch_bd->bd_ops->drain(tty, 0); | |
3185 | if (rc) { | |
3186 | DPR_IOCTL(("dgnc_tty_ioctl - bad return: %d ", rc)); | |
8f90ef80 | 3187 | return -EINTR; |
0b99d589 LL |
3188 | } |
3189 | ||
3190 | /* pretend we didn't recognize this */ | |
8f90ef80 | 3191 | return -ENOIOCTLCMD; |
0b99d589 LL |
3192 | |
3193 | case TCXONC: | |
3194 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
3195 | /* Make the ld do it */ | |
8f90ef80 | 3196 | return -ENOIOCTLCMD; |
0b99d589 LL |
3197 | |
3198 | case DIGI_GETA: | |
3199 | /* get information for ditty */ | |
3200 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
8f90ef80 | 3201 | return dgnc_tty_digigeta(tty, uarg); |
0b99d589 LL |
3202 | |
3203 | case DIGI_SETAW: | |
3204 | case DIGI_SETAF: | |
3205 | ||
3206 | /* set information for ditty */ | |
3207 | if (cmd == (DIGI_SETAW)) { | |
3208 | ||
3209 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
3210 | rc = ch->ch_bd->bd_ops->drain(tty, 0); | |
3211 | if (rc) { | |
3212 | DPR_IOCTL(("dgnc_tty_ioctl - bad return: %d ", rc)); | |
8f90ef80 | 3213 | return -EINTR; |
0b99d589 LL |
3214 | } |
3215 | DGNC_LOCK(ch->ch_lock, lock_flags); | |
2000c581 | 3216 | } else { |
0b99d589 LL |
3217 | tty_ldisc_flush(tty); |
3218 | } | |
3219 | /* fall thru */ | |
3220 | ||
3221 | case DIGI_SETA: | |
3222 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
8f90ef80 | 3223 | return dgnc_tty_digiseta(tty, uarg); |
8b07d521 | 3224 | |
0b99d589 LL |
3225 | case DIGI_LOOPBACK: |
3226 | { | |
3227 | uint loopback = 0; | |
3228 | /* Let go of locks when accessing user space, could sleep */ | |
3229 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
3230 | rc = get_user(loopback, (unsigned int __user *) arg); | |
3231 | if (rc) | |
8f90ef80 | 3232 | return rc; |
0b99d589 LL |
3233 | DGNC_LOCK(ch->ch_lock, lock_flags); |
3234 | ||
8b07d521 | 3235 | /* Enable/disable internal loopback for this port */ |
0b99d589 LL |
3236 | if (loopback) |
3237 | ch->ch_flags |= CH_LOOPBACK; | |
3238 | else | |
3239 | ch->ch_flags &= ~(CH_LOOPBACK); | |
3240 | ||
3241 | ch->ch_bd->bd_ops->param(tty); | |
3242 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
8f90ef80 | 3243 | return 0; |
90d2a471 | 3244 | } |
0b99d589 LL |
3245 | |
3246 | case DIGI_GETCUSTOMBAUD: | |
3247 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
3248 | rc = put_user(ch->ch_custom_speed, (unsigned int __user *) arg); | |
8f90ef80 | 3249 | return rc; |
0b99d589 LL |
3250 | |
3251 | case DIGI_SETCUSTOMBAUD: | |
3252 | { | |
93c76c9c | 3253 | int new_rate; |
0b99d589 LL |
3254 | /* Let go of locks when accessing user space, could sleep */ |
3255 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
93c76c9c | 3256 | rc = get_user(new_rate, (int __user *) arg); |
0b99d589 | 3257 | if (rc) |
8f90ef80 | 3258 | return rc; |
0b99d589 LL |
3259 | DGNC_LOCK(ch->ch_lock, lock_flags); |
3260 | dgnc_set_custom_speed(ch, new_rate); | |
3261 | ch->ch_bd->bd_ops->param(tty); | |
3262 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
8f90ef80 | 3263 | return 0; |
90d2a471 | 3264 | } |
0b99d589 LL |
3265 | |
3266 | /* | |
3267 | * This ioctl allows insertion of a character into the front | |
3268 | * of any pending data to be transmitted. | |
3269 | * | |
3270 | * This ioctl is to satify the "Send Character Immediate" | |
3271 | * call that the RealPort protocol spec requires. | |
3272 | */ | |
3273 | case DIGI_REALPORT_SENDIMMEDIATE: | |
3274 | { | |
3275 | unsigned char c; | |
3276 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
3277 | rc = get_user(c, (unsigned char __user *) arg); | |
3278 | if (rc) | |
8f90ef80 | 3279 | return rc; |
0b99d589 LL |
3280 | DGNC_LOCK(ch->ch_lock, lock_flags); |
3281 | ch->ch_bd->bd_ops->send_immediate_char(ch, c); | |
3282 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
8f90ef80 | 3283 | return 0; |
0b99d589 LL |
3284 | } |
3285 | ||
3286 | /* | |
3287 | * This ioctl returns all the current counts for the port. | |
3288 | * | |
3289 | * This ioctl is to satify the "Line Error Counters" | |
3290 | * call that the RealPort protocol spec requires. | |
3291 | */ | |
3292 | case DIGI_REALPORT_GETCOUNTERS: | |
3293 | { | |
3294 | struct digi_getcounter buf; | |
3295 | ||
3296 | buf.norun = ch->ch_err_overrun; | |
3297 | buf.noflow = 0; /* The driver doesn't keep this stat */ | |
3298 | buf.nframe = ch->ch_err_frame; | |
3299 | buf.nparity = ch->ch_err_parity; | |
3300 | buf.nbreak = ch->ch_err_break; | |
3301 | buf.rbytes = ch->ch_rxcount; | |
3302 | buf.tbytes = ch->ch_txcount; | |
3303 | ||
3304 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
3305 | ||
50667c67 | 3306 | if (copy_to_user(uarg, &buf, sizeof(buf))) |
8f90ef80 | 3307 | return -EFAULT; |
50667c67 | 3308 | |
8f90ef80 | 3309 | return 0; |
0b99d589 LL |
3310 | } |
3311 | ||
3312 | /* | |
3313 | * This ioctl returns all current events. | |
3314 | * | |
3315 | * This ioctl is to satify the "Event Reporting" | |
3316 | * call that the RealPort protocol spec requires. | |
90d2a471 | 3317 | */ |
0b99d589 LL |
3318 | case DIGI_REALPORT_GETEVENTS: |
3319 | { | |
3320 | unsigned int events = 0; | |
3321 | ||
3322 | /* NOTE: MORE EVENTS NEEDS TO BE ADDED HERE */ | |
3323 | if (ch->ch_flags & CH_BREAK_SENDING) | |
3324 | events |= EV_TXB; | |
50667c67 | 3325 | if ((ch->ch_flags & CH_STOP) || (ch->ch_flags & CH_FORCED_STOP)) |
0b99d589 | 3326 | events |= (EV_OPU | EV_OPS); |
50667c67 | 3327 | |
0b99d589 LL |
3328 | if ((ch->ch_flags & CH_STOPI) || (ch->ch_flags & CH_FORCED_STOPI)) { |
3329 | events |= (EV_IPU | EV_IPS); | |
3330 | } | |
3331 | ||
3332 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
3333 | rc = put_user(events, (unsigned int __user *) arg); | |
8f90ef80 | 3334 | return rc; |
0b99d589 LL |
3335 | } |
3336 | ||
3337 | /* | |
3338 | * This ioctl returns TOUT and TIN counters based | |
3339 | * upon the values passed in by the RealPort Server. | |
3340 | * It also passes back whether the UART Transmitter is | |
3341 | * empty as well. | |
90d2a471 | 3342 | */ |
0b99d589 LL |
3343 | case DIGI_REALPORT_GETBUFFERS: |
3344 | { | |
3345 | struct digi_getbuffer buf; | |
3346 | int tdist; | |
3347 | int count; | |
3348 | ||
3349 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
3350 | ||
3351 | /* | |
3352 | * Get data from user first. | |
3353 | */ | |
50667c67 | 3354 | if (copy_from_user(&buf, uarg, sizeof(buf))) |
8f90ef80 | 3355 | return -EFAULT; |
0b99d589 LL |
3356 | |
3357 | DGNC_LOCK(ch->ch_lock, lock_flags); | |
3358 | ||
3359 | /* | |
3360 | * Figure out how much data is in our RX and TX queues. | |
3361 | */ | |
3362 | buf.rxbuf = (ch->ch_r_head - ch->ch_r_tail) & RQUEUEMASK; | |
3363 | buf.txbuf = (ch->ch_w_head - ch->ch_w_tail) & WQUEUEMASK; | |
3364 | ||
3365 | /* | |
3366 | * Is the UART empty? Add that value to whats in our TX queue. | |
3367 | */ | |
3368 | count = buf.txbuf + ch->ch_bd->bd_ops->get_uart_bytes_left(ch); | |
3369 | ||
3370 | /* | |
3371 | * Figure out how much data the RealPort Server believes should | |
3372 | * be in our TX queue. | |
3373 | */ | |
3374 | tdist = (buf.tIn - buf.tOut) & 0xffff; | |
3375 | ||
3376 | /* | |
3377 | * If we have more data than the RealPort Server believes we | |
3378 | * should have, reduce our count to its amount. | |
3379 | * | |
3380 | * This count difference CAN happen because the Linux LD can | |
3381 | * insert more characters into our queue for OPOST processing | |
3382 | * that the RealPort Server doesn't know about. | |
3383 | */ | |
50667c67 | 3384 | if (buf.txbuf > tdist) |
0b99d589 | 3385 | buf.txbuf = tdist; |
0b99d589 LL |
3386 | |
3387 | /* | |
3388 | * Report whether our queue and UART TX are completely empty. | |
3389 | */ | |
50667c67 | 3390 | if (count) |
0b99d589 | 3391 | buf.txdone = 0; |
50667c67 | 3392 | else |
0b99d589 | 3393 | buf.txdone = 1; |
0b99d589 LL |
3394 | |
3395 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
3396 | ||
50667c67 | 3397 | if (copy_to_user(uarg, &buf, sizeof(buf))) |
8f90ef80 | 3398 | return -EFAULT; |
50667c67 | 3399 | |
8f90ef80 | 3400 | return 0; |
0b99d589 LL |
3401 | } |
3402 | default: | |
3403 | DGNC_UNLOCK(ch->ch_lock, lock_flags); | |
3404 | ||
3405 | DPR_IOCTL(("dgnc_tty_ioctl - in default\n")); | |
8b07d521 | 3406 | DPR_IOCTL(("dgnc_tty_ioctl end - cmd %s (%x), arg %lx\n", |
0b99d589 LL |
3407 | dgnc_ioctl_name(cmd), cmd, arg)); |
3408 | ||
8f90ef80 | 3409 | return -ENOIOCTLCMD; |
0b99d589 | 3410 | } |
0b99d589 | 3411 | } |