Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * This program is free software; you can redistribute it and/or | |
3 | * modify it under the terms of the GNU General Public License | |
4 | * as published by the Free Software Foundation; either version | |
5 | * 2 of the License, or (at your option) any later version. | |
6 | * | |
7 | * Original driver code supplied by Multi-Tech | |
8 | * | |
9 | * Changes | |
10 | * 1/9/98 alan@redhat.com Merge to 2.0.x kernel tree | |
11 | * Obtain and use official major/minors | |
12 | * Loader switched to a misc device | |
13 | * (fixed range check bug as a side effect) | |
14 | * Printk clean up | |
15 | * 9/12/98 alan@redhat.com Rough port to 2.1.x | |
16 | * | |
17 | * 10/6/99 sameer Merged the ISA and PCI drivers to | |
18 | * a new unified driver. | |
19 | * | |
20 | * 3/9/99 sameer Added support for ISI4616 cards. | |
21 | * | |
22 | * 16/9/99 sameer We do not force RTS low anymore. | |
d8d16e47 | 23 | * This is to prevent the firmware |
1da177e4 LT |
24 | * from getting confused. |
25 | * | |
26 | * 26/10/99 sameer Cosmetic changes:The driver now | |
27 | * dumps the Port Count information | |
28 | * along with I/O address and IRQ. | |
29 | * | |
30 | * 13/12/99 sameer Fixed the problem with IRQ sharing. | |
31 | * | |
32 | * 10/5/00 sameer Fixed isicom_shutdown_board() | |
33 | * to not lower DTR on all the ports | |
d8d16e47 | 34 | * when the last port on the card is |
1da177e4 LT |
35 | * closed. |
36 | * | |
37 | * 10/5/00 sameer Signal mask setup command added | |
d8d16e47 | 38 | * to isicom_setup_port and |
1da177e4 LT |
39 | * isicom_shutdown_port. |
40 | * | |
41 | * 24/5/00 sameer The driver is now SMP aware. | |
d8d16e47 JS |
42 | * |
43 | * | |
1da177e4 | 44 | * 27/11/00 Vinayak P Risbud Fixed the Driver Crash Problem |
d8d16e47 JS |
45 | * |
46 | * | |
1da177e4 LT |
47 | * 03/01/01 anil .s Added support for resetting the |
48 | * internal modems on ISI cards. | |
49 | * | |
50 | * 08/02/01 anil .s Upgraded the driver for kernel | |
51 | * 2.4.x | |
52 | * | |
d8d16e47 | 53 | * 11/04/01 Kevin Fixed firmware load problem with |
1da177e4 | 54 | * ISIHP-4X card |
d8d16e47 | 55 | * |
1da177e4 LT |
56 | * 30/04/01 anil .s Fixed the remote login through |
57 | * ISI port problem. Now the link | |
58 | * does not go down before password | |
59 | * prompt. | |
60 | * | |
61 | * 03/05/01 anil .s Fixed the problem with IRQ sharing | |
62 | * among ISI-PCI cards. | |
63 | * | |
64 | * 03/05/01 anil .s Added support to display the version | |
d8d16e47 | 65 | * info during insmod as well as module |
1da177e4 | 66 | * listing by lsmod. |
d8d16e47 | 67 | * |
1da177e4 LT |
68 | * 10/05/01 anil .s Done the modifications to the source |
69 | * file and Install script so that the | |
70 | * same installation can be used for | |
71 | * 2.2.x and 2.4.x kernel. | |
72 | * | |
73 | * 06/06/01 anil .s Now we drop both dtr and rts during | |
74 | * shutdown_port as well as raise them | |
75 | * during isicom_config_port. | |
d8d16e47 | 76 | * |
1da177e4 LT |
77 | * 09/06/01 acme@conectiva.com.br use capable, not suser, do |
78 | * restore_flags on failure in | |
79 | * isicom_send_break, verify put_user | |
80 | * result | |
81 | * | |
d8d16e47 JS |
82 | * 11/02/03 ranjeeth Added support for 230 Kbps and 460 Kbps |
83 | * Baud index extended to 21 | |
84 | * | |
85 | * 20/03/03 ranjeeth Made to work for Linux Advanced server. | |
86 | * Taken care of license warning. | |
87 | * | |
88 | * 10/12/03 Ravindra Made to work for Fedora Core 1 of | |
1da177e4 LT |
89 | * Red Hat Distribution |
90 | * | |
91 | * 06/01/05 Alan Cox Merged the ISI and base kernel strands | |
92 | * into a single 2.6 driver | |
93 | * | |
94 | * *********************************************************** | |
95 | * | |
d8d16e47 | 96 | * To use this driver you also need the support package. You |
1da177e4 LT |
97 | * can find this in RPM format on |
98 | * ftp://ftp.linux.org.uk/pub/linux/alan | |
d8d16e47 | 99 | * |
1da177e4 LT |
100 | * You can find the original tools for this direct from Multitech |
101 | * ftp://ftp.multitech.com/ISI-Cards/ | |
102 | * | |
103 | * Having installed the cards the module options (/etc/modprobe.conf) | |
104 | * | |
105 | * options isicom io=card1,card2,card3,card4 irq=card1,card2,card3,card4 | |
106 | * | |
107 | * Omit those entries for boards you don't have installed. | |
108 | * | |
109 | * TODO | |
1da177e4 LT |
110 | * Merge testing |
111 | * 64-bit verification | |
112 | */ | |
113 | ||
114 | #include <linux/module.h> | |
e65c1db1 | 115 | #include <linux/firmware.h> |
1da177e4 LT |
116 | #include <linux/kernel.h> |
117 | #include <linux/tty.h> | |
33f0f88f | 118 | #include <linux/tty_flip.h> |
1da177e4 LT |
119 | #include <linux/termios.h> |
120 | #include <linux/fs.h> | |
121 | #include <linux/sched.h> | |
122 | #include <linux/serial.h> | |
123 | #include <linux/mm.h> | |
1da177e4 LT |
124 | #include <linux/interrupt.h> |
125 | #include <linux/timer.h> | |
126 | #include <linux/delay.h> | |
127 | #include <linux/ioport.h> | |
128 | ||
129 | #include <asm/uaccess.h> | |
130 | #include <asm/io.h> | |
131 | #include <asm/system.h> | |
132 | ||
133 | #include <linux/pci.h> | |
134 | ||
135 | #include <linux/isicom.h> | |
136 | ||
aaa246ea JS |
137 | #define InterruptTheCard(base) outw(0, (base) + 0xc) |
138 | #define ClearInterrupt(base) inw((base) + 0x0a) | |
139 | ||
73b52572 | 140 | #define pr_dbg(str...) pr_debug("ISICOM: " str) |
aaa246ea | 141 | #ifdef DEBUG |
aaa246ea JS |
142 | #define isicom_paranoia_check(a, b, c) __isicom_paranoia_check((a), (b), (c)) |
143 | #else | |
aaa246ea JS |
144 | #define isicom_paranoia_check(a, b, c) 0 |
145 | #endif | |
146 | ||
9ac0948b JS |
147 | static int isicom_probe(struct pci_dev *, const struct pci_device_id *); |
148 | static void __devexit isicom_remove(struct pci_dev *); | |
149 | ||
1da177e4 | 150 | static struct pci_device_id isicom_pci_tbl[] = { |
9ac0948b JS |
151 | { PCI_DEVICE(VENDOR_ID, 0x2028) }, |
152 | { PCI_DEVICE(VENDOR_ID, 0x2051) }, | |
153 | { PCI_DEVICE(VENDOR_ID, 0x2052) }, | |
154 | { PCI_DEVICE(VENDOR_ID, 0x2053) }, | |
155 | { PCI_DEVICE(VENDOR_ID, 0x2054) }, | |
156 | { PCI_DEVICE(VENDOR_ID, 0x2055) }, | |
157 | { PCI_DEVICE(VENDOR_ID, 0x2056) }, | |
158 | { PCI_DEVICE(VENDOR_ID, 0x2057) }, | |
159 | { PCI_DEVICE(VENDOR_ID, 0x2058) }, | |
1da177e4 LT |
160 | { 0 } |
161 | }; | |
162 | MODULE_DEVICE_TABLE(pci, isicom_pci_tbl); | |
163 | ||
9ac0948b JS |
164 | static struct pci_driver isicom_driver = { |
165 | .name = "isicom", | |
166 | .id_table = isicom_pci_tbl, | |
167 | .probe = isicom_probe, | |
168 | .remove = __devexit_p(isicom_remove) | |
169 | }; | |
170 | ||
1da177e4 LT |
171 | static int prev_card = 3; /* start servicing isi_card[0] */ |
172 | static struct tty_driver *isicom_normal; | |
173 | ||
906cdecb | 174 | static DECLARE_COMPLETION(isi_timerdone); |
1da177e4 | 175 | static char re_schedule = 1; |
1da177e4 | 176 | |
1da177e4 | 177 | static void isicom_tx(unsigned long _data); |
d8d16e47 | 178 | static void isicom_start(struct tty_struct *tty); |
1da177e4 | 179 | |
34b55b86 JS |
180 | static DEFINE_TIMER(tx, isicom_tx, 0, 0); |
181 | ||
1da177e4 LT |
182 | /* baud index mappings from linux defns to isi */ |
183 | ||
184 | static signed char linuxb_to_isib[] = { | |
7edc136a | 185 | -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 16, 17, 18, 19, 20, 21 |
1da177e4 LT |
186 | }; |
187 | ||
188 | struct isi_board { | |
8070e35c | 189 | unsigned long base; |
1da177e4 LT |
190 | unsigned char irq; |
191 | unsigned char port_count; | |
192 | unsigned short status; | |
a547dfe9 | 193 | unsigned short port_status; /* each bit for each port */ |
1da177e4 LT |
194 | unsigned short shift_count; |
195 | struct isi_port * ports; | |
196 | signed char count; | |
1da177e4 LT |
197 | spinlock_t card_lock; /* Card wide lock 11/5/00 -sameer */ |
198 | unsigned long flags; | |
938a7023 | 199 | unsigned int index; |
1da177e4 LT |
200 | }; |
201 | ||
202 | struct isi_port { | |
203 | unsigned short magic; | |
204 | unsigned int flags; | |
205 | int count; | |
206 | int blocked_open; | |
207 | int close_delay; | |
8070e35c JS |
208 | u16 channel; |
209 | u16 status; | |
210 | u16 closing_wait; | |
1da177e4 LT |
211 | struct isi_board * card; |
212 | struct tty_struct * tty; | |
213 | wait_queue_head_t close_wait; | |
214 | wait_queue_head_t open_wait; | |
1da177e4 LT |
215 | unsigned char * xmit_buf; |
216 | int xmit_head; | |
217 | int xmit_tail; | |
218 | int xmit_cnt; | |
219 | }; | |
220 | ||
221 | static struct isi_board isi_card[BOARD_COUNT]; | |
222 | static struct isi_port isi_ports[PORT_COUNT]; | |
223 | ||
224 | /* | |
225 | * Locking functions for card level locking. We need to own both | |
226 | * the kernel lock for the card and have the card in a position that | |
227 | * it wants to talk. | |
228 | */ | |
d8d16e47 | 229 | |
cfe7c09a JS |
230 | static inline int WaitTillCardIsFree(u16 base) |
231 | { | |
232 | unsigned int count = 0; | |
233 | unsigned int a = in_atomic(); /* do we run under spinlock? */ | |
234 | ||
235 | while (!(inw(base + 0xe) & 0x1) && count++ < 100) | |
236 | if (a) | |
237 | mdelay(1); | |
238 | else | |
239 | msleep(1); | |
240 | ||
241 | return !(inw(base + 0xe) & 0x1); | |
242 | } | |
243 | ||
1da177e4 LT |
244 | static int lock_card(struct isi_board *card) |
245 | { | |
246 | char retries; | |
8070e35c | 247 | unsigned long base = card->base; |
1da177e4 LT |
248 | |
249 | for (retries = 0; retries < 100; retries++) { | |
250 | spin_lock_irqsave(&card->card_lock, card->flags); | |
251 | if (inw(base + 0xe) & 0x1) { | |
d8d16e47 | 252 | return 1; |
1da177e4 LT |
253 | } else { |
254 | spin_unlock_irqrestore(&card->card_lock, card->flags); | |
255 | udelay(1000); /* 1ms */ | |
256 | } | |
257 | } | |
a547dfe9 JS |
258 | printk(KERN_WARNING "ISICOM: Failed to lock Card (0x%lx)\n", |
259 | card->base); | |
260 | ||
0418726b | 261 | return 0; /* Failed to acquire the card! */ |
1da177e4 LT |
262 | } |
263 | ||
264 | static int lock_card_at_interrupt(struct isi_board *card) | |
265 | { | |
266 | unsigned char retries; | |
8070e35c | 267 | unsigned long base = card->base; |
1da177e4 LT |
268 | |
269 | for (retries = 0; retries < 200; retries++) { | |
270 | spin_lock_irqsave(&card->card_lock, card->flags); | |
271 | ||
272 | if (inw(base + 0xe) & 0x1) | |
d8d16e47 | 273 | return 1; |
1da177e4 LT |
274 | else |
275 | spin_unlock_irqrestore(&card->card_lock, card->flags); | |
276 | } | |
277 | /* Failing in interrupt is an acceptable event */ | |
0418726b | 278 | return 0; /* Failed to acquire the card! */ |
1da177e4 LT |
279 | } |
280 | ||
281 | static void unlock_card(struct isi_board *card) | |
282 | { | |
283 | spin_unlock_irqrestore(&card->card_lock, card->flags); | |
284 | } | |
285 | ||
286 | /* | |
287 | * ISI Card specific ops ... | |
288 | */ | |
d8d16e47 | 289 | |
cfe7c09a | 290 | /* card->lock HAS to be held */ |
d8d16e47 | 291 | static void raise_dtr(struct isi_port *port) |
1da177e4 | 292 | { |
d8d16e47 | 293 | struct isi_board *card = port->card; |
8070e35c JS |
294 | unsigned long base = card->base; |
295 | u16 channel = port->channel; | |
1da177e4 | 296 | |
cfe7c09a | 297 | if (WaitTillCardIsFree(base)) |
1da177e4 LT |
298 | return; |
299 | ||
d8d16e47 | 300 | outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
1da177e4 LT |
301 | outw(0x0504, base); |
302 | InterruptTheCard(base); | |
303 | port->status |= ISI_DTR; | |
1da177e4 LT |
304 | } |
305 | ||
cfe7c09a | 306 | /* card->lock HAS to be held */ |
d8d16e47 JS |
307 | static inline void drop_dtr(struct isi_port *port) |
308 | { | |
309 | struct isi_board *card = port->card; | |
8070e35c JS |
310 | unsigned long base = card->base; |
311 | u16 channel = port->channel; | |
1da177e4 | 312 | |
cfe7c09a | 313 | if (WaitTillCardIsFree(base)) |
1da177e4 LT |
314 | return; |
315 | ||
d8d16e47 | 316 | outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
1da177e4 | 317 | outw(0x0404, base); |
d8d16e47 | 318 | InterruptTheCard(base); |
1da177e4 | 319 | port->status &= ~ISI_DTR; |
1da177e4 LT |
320 | } |
321 | ||
cfe7c09a | 322 | /* card->lock HAS to be held */ |
d8d16e47 | 323 | static inline void raise_rts(struct isi_port *port) |
1da177e4 | 324 | { |
d8d16e47 | 325 | struct isi_board *card = port->card; |
8070e35c JS |
326 | unsigned long base = card->base; |
327 | u16 channel = port->channel; | |
1da177e4 | 328 | |
cfe7c09a | 329 | if (WaitTillCardIsFree(base)) |
1da177e4 LT |
330 | return; |
331 | ||
d8d16e47 | 332 | outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
1da177e4 | 333 | outw(0x0a04, base); |
d8d16e47 | 334 | InterruptTheCard(base); |
1da177e4 | 335 | port->status |= ISI_RTS; |
1da177e4 | 336 | } |
cfe7c09a JS |
337 | |
338 | /* card->lock HAS to be held */ | |
d8d16e47 | 339 | static inline void drop_rts(struct isi_port *port) |
1da177e4 | 340 | { |
d8d16e47 | 341 | struct isi_board *card = port->card; |
8070e35c JS |
342 | unsigned long base = card->base; |
343 | u16 channel = port->channel; | |
1da177e4 | 344 | |
cfe7c09a | 345 | if (WaitTillCardIsFree(base)) |
1da177e4 LT |
346 | return; |
347 | ||
d8d16e47 | 348 | outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
1da177e4 | 349 | outw(0x0804, base); |
d8d16e47 | 350 | InterruptTheCard(base); |
1da177e4 | 351 | port->status &= ~ISI_RTS; |
1da177e4 LT |
352 | } |
353 | ||
cfe7c09a | 354 | /* card->lock MUST NOT be held */ |
d8d16e47 | 355 | static inline void raise_dtr_rts(struct isi_port *port) |
1da177e4 | 356 | { |
d8d16e47 | 357 | struct isi_board *card = port->card; |
8070e35c JS |
358 | unsigned long base = card->base; |
359 | u16 channel = port->channel; | |
1da177e4 LT |
360 | |
361 | if (!lock_card(card)) | |
362 | return; | |
363 | ||
d8d16e47 | 364 | outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
1da177e4 LT |
365 | outw(0x0f04, base); |
366 | InterruptTheCard(base); | |
367 | port->status |= (ISI_DTR | ISI_RTS); | |
368 | unlock_card(card); | |
369 | } | |
370 | ||
cfe7c09a | 371 | /* card->lock HAS to be held */ |
d8d16e47 | 372 | static void drop_dtr_rts(struct isi_port *port) |
1da177e4 | 373 | { |
d8d16e47 | 374 | struct isi_board *card = port->card; |
8070e35c JS |
375 | unsigned long base = card->base; |
376 | u16 channel = port->channel; | |
1da177e4 | 377 | |
cfe7c09a | 378 | if (WaitTillCardIsFree(base)) |
1da177e4 LT |
379 | return; |
380 | ||
d8d16e47 | 381 | outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
1da177e4 | 382 | outw(0x0c04, base); |
d8d16e47 | 383 | InterruptTheCard(base); |
1da177e4 | 384 | port->status &= ~(ISI_RTS | ISI_DTR); |
1da177e4 LT |
385 | } |
386 | ||
1da177e4 LT |
387 | /* |
388 | * ISICOM Driver specific routines ... | |
389 | * | |
390 | */ | |
d8d16e47 | 391 | |
aaa246ea JS |
392 | static inline int __isicom_paranoia_check(struct isi_port const *port, |
393 | char *name, const char *routine) | |
1da177e4 | 394 | { |
1da177e4 | 395 | if (!port) { |
aaa246ea JS |
396 | printk(KERN_WARNING "ISICOM: Warning: bad isicom magic for " |
397 | "dev %s in %s.\n", name, routine); | |
1da177e4 LT |
398 | return 1; |
399 | } | |
400 | if (port->magic != ISICOM_MAGIC) { | |
aaa246ea JS |
401 | printk(KERN_WARNING "ISICOM: Warning: NULL isicom port for " |
402 | "dev %s in %s.\n", name, routine); | |
1da177e4 | 403 | return 1; |
d8d16e47 | 404 | } |
aaa246ea | 405 | |
1da177e4 LT |
406 | return 0; |
407 | } | |
d8d16e47 | 408 | |
1da177e4 | 409 | /* |
d8d16e47 | 410 | * Transmitter. |
1da177e4 LT |
411 | * |
412 | * We shovel data into the card buffers on a regular basis. The card | |
413 | * will do the rest of the work for us. | |
414 | */ | |
415 | ||
416 | static void isicom_tx(unsigned long _data) | |
417 | { | |
418 | short count = (BOARD_COUNT-1), card, base; | |
419 | short txcount, wrd, residue, word_count, cnt; | |
d8d16e47 JS |
420 | struct isi_port *port; |
421 | struct tty_struct *tty; | |
422 | ||
1da177e4 LT |
423 | /* find next active board */ |
424 | card = (prev_card + 1) & 0x0003; | |
425 | while(count-- > 0) { | |
d8d16e47 | 426 | if (isi_card[card].status & BOARD_ACTIVE) |
1da177e4 | 427 | break; |
d8d16e47 | 428 | card = (card + 1) & 0x0003; |
1da177e4 LT |
429 | } |
430 | if (!(isi_card[card].status & BOARD_ACTIVE)) | |
431 | goto sched_again; | |
d8d16e47 | 432 | |
1da177e4 | 433 | prev_card = card; |
d8d16e47 | 434 | |
1da177e4 LT |
435 | count = isi_card[card].port_count; |
436 | port = isi_card[card].ports; | |
437 | base = isi_card[card].base; | |
438 | for (;count > 0;count--, port++) { | |
439 | if (!lock_card_at_interrupt(&isi_card[card])) | |
440 | continue; | |
441 | /* port not active or tx disabled to force flow control */ | |
442 | if (!(port->flags & ASYNC_INITIALIZED) || | |
d8d16e47 | 443 | !(port->status & ISI_TXOK)) |
1da177e4 LT |
444 | unlock_card(&isi_card[card]); |
445 | continue; | |
d8d16e47 | 446 | |
1da177e4 | 447 | tty = port->tty; |
d8d16e47 JS |
448 | |
449 | ||
450 | if (tty == NULL) { | |
1da177e4 LT |
451 | unlock_card(&isi_card[card]); |
452 | continue; | |
453 | } | |
d8d16e47 | 454 | |
1da177e4 LT |
455 | txcount = min_t(short, TX_SIZE, port->xmit_cnt); |
456 | if (txcount <= 0 || tty->stopped || tty->hw_stopped) { | |
457 | unlock_card(&isi_card[card]); | |
458 | continue; | |
459 | } | |
460 | if (!(inw(base + 0x02) & (1 << port->channel))) { | |
461 | unlock_card(&isi_card[card]); | |
d8d16e47 | 462 | continue; |
1da177e4 | 463 | } |
aaa246ea JS |
464 | pr_dbg("txing %d bytes, port%d.\n", txcount, |
465 | port->channel + 1); | |
466 | outw((port->channel << isi_card[card].shift_count) | txcount, | |
467 | base); | |
1da177e4 | 468 | residue = NO; |
d8d16e47 | 469 | wrd = 0; |
1da177e4 | 470 | while (1) { |
a547dfe9 JS |
471 | cnt = min_t(int, txcount, (SERIAL_XMIT_SIZE |
472 | - port->xmit_tail)); | |
1da177e4 LT |
473 | if (residue == YES) { |
474 | residue = NO; | |
475 | if (cnt > 0) { | |
a547dfe9 JS |
476 | wrd |= (port->xmit_buf[port->xmit_tail] |
477 | << 8); | |
478 | port->xmit_tail = (port->xmit_tail + 1) | |
479 | & (SERIAL_XMIT_SIZE - 1); | |
1da177e4 LT |
480 | port->xmit_cnt--; |
481 | txcount--; | |
482 | cnt--; | |
d8d16e47 | 483 | outw(wrd, base); |
a547dfe9 | 484 | } else { |
1da177e4 LT |
485 | outw(wrd, base); |
486 | break; | |
487 | } | |
d8d16e47 | 488 | } |
1da177e4 LT |
489 | if (cnt <= 0) break; |
490 | word_count = cnt >> 1; | |
a547dfe9 JS |
491 | outsw(base, port->xmit_buf+port->xmit_tail,word_count); |
492 | port->xmit_tail = (port->xmit_tail | |
493 | + (word_count << 1)) & (SERIAL_XMIT_SIZE - 1); | |
1da177e4 LT |
494 | txcount -= (word_count << 1); |
495 | port->xmit_cnt -= (word_count << 1); | |
496 | if (cnt & 0x0001) { | |
497 | residue = YES; | |
498 | wrd = port->xmit_buf[port->xmit_tail]; | |
a547dfe9 JS |
499 | port->xmit_tail = (port->xmit_tail + 1) |
500 | & (SERIAL_XMIT_SIZE - 1); | |
1da177e4 LT |
501 | port->xmit_cnt--; |
502 | txcount--; | |
503 | } | |
504 | } | |
505 | ||
506 | InterruptTheCard(base); | |
507 | if (port->xmit_cnt <= 0) | |
508 | port->status &= ~ISI_TXOK; | |
509 | if (port->xmit_cnt <= WAKEUP_CHARS) | |
0aa5de85 | 510 | tty_wakeup(tty); |
1da177e4 | 511 | unlock_card(&isi_card[card]); |
d8d16e47 | 512 | } |
1da177e4 | 513 | |
d8d16e47 JS |
514 | /* schedule another tx for hopefully in about 10ms */ |
515 | sched_again: | |
aaa246ea | 516 | if (!re_schedule) { |
906cdecb | 517 | complete(&isi_timerdone); |
aaa246ea JS |
518 | return; |
519 | } | |
520 | ||
34b55b86 | 521 | mod_timer(&tx, jiffies + msecs_to_jiffies(10)); |
d8d16e47 JS |
522 | } |
523 | ||
1da177e4 | 524 | /* |
d8d16e47 | 525 | * Main interrupt handler routine |
1da177e4 | 526 | */ |
d8d16e47 | 527 | |
7d12e780 | 528 | static irqreturn_t isicom_interrupt(int irq, void *dev_id) |
1da177e4 | 529 | { |
8070e35c | 530 | struct isi_board *card = dev_id; |
d8d16e47 JS |
531 | struct isi_port *port; |
532 | struct tty_struct *tty; | |
8070e35c JS |
533 | unsigned long base; |
534 | u16 header, word_count, count, channel; | |
1da177e4 | 535 | short byte_count; |
33f0f88f | 536 | unsigned char *rp; |
d8d16e47 | 537 | |
1da177e4 LT |
538 | if (!card || !(card->status & FIRMWARE_LOADED)) |
539 | return IRQ_NONE; | |
d8d16e47 | 540 | |
1da177e4 | 541 | base = card->base; |
cb4a10cc JS |
542 | |
543 | /* did the card interrupt us? */ | |
544 | if (!(inw(base + 0x0e) & 0x02)) | |
545 | return IRQ_NONE; | |
546 | ||
1da177e4 | 547 | spin_lock(&card->card_lock); |
d8d16e47 | 548 | |
18234f88 JS |
549 | /* |
550 | * disable any interrupts from the PCI card and lower the | |
551 | * interrupt line | |
552 | */ | |
553 | outw(0x8000, base+0x04); | |
554 | ClearInterrupt(base); | |
d8d16e47 | 555 | |
1da177e4 LT |
556 | inw(base); /* get the dummy word out */ |
557 | header = inw(base); | |
558 | channel = (header & 0x7800) >> card->shift_count; | |
559 | byte_count = header & 0xff; | |
560 | ||
561 | if (channel + 1 > card->port_count) { | |
a547dfe9 JS |
562 | printk(KERN_WARNING "ISICOM: isicom_interrupt(0x%lx): " |
563 | "%d(channel) > port_count.\n", base, channel+1); | |
18234f88 | 564 | outw(0x0000, base+0x04); /* enable interrupts */ |
1da177e4 | 565 | spin_unlock(&card->card_lock); |
d8d16e47 | 566 | return IRQ_HANDLED; |
1da177e4 LT |
567 | } |
568 | port = card->ports + channel; | |
569 | if (!(port->flags & ASYNC_INITIALIZED)) { | |
18234f88 | 570 | outw(0x0000, base+0x04); /* enable interrupts */ |
174f1307 | 571 | spin_unlock(&card->card_lock); |
1da177e4 | 572 | return IRQ_HANDLED; |
d8d16e47 JS |
573 | } |
574 | ||
1da177e4 LT |
575 | tty = port->tty; |
576 | if (tty == NULL) { | |
577 | word_count = byte_count >> 1; | |
578 | while(byte_count > 1) { | |
579 | inw(base); | |
580 | byte_count -= 2; | |
581 | } | |
582 | if (byte_count & 0x01) | |
583 | inw(base); | |
18234f88 | 584 | outw(0x0000, base+0x04); /* enable interrupts */ |
1da177e4 LT |
585 | spin_unlock(&card->card_lock); |
586 | return IRQ_HANDLED; | |
587 | } | |
d8d16e47 | 588 | |
1da177e4 LT |
589 | if (header & 0x8000) { /* Status Packet */ |
590 | header = inw(base); | |
591 | switch(header & 0xff) { | |
d8d16e47 | 592 | case 0: /* Change in EIA signals */ |
d8d16e47 JS |
593 | if (port->flags & ASYNC_CHECK_CD) { |
594 | if (port->status & ISI_DCD) { | |
595 | if (!(header & ISI_DCD)) { | |
596 | /* Carrier has been lost */ | |
a547dfe9 JS |
597 | pr_dbg("interrupt: DCD->low.\n" |
598 | ); | |
d8d16e47 | 599 | port->status &= ~ISI_DCD; |
0aa5de85 | 600 | tty_hangup(tty); |
1da177e4 | 601 | } |
a547dfe9 JS |
602 | } else if (header & ISI_DCD) { |
603 | /* Carrier has been detected */ | |
604 | pr_dbg("interrupt: DCD->high.\n"); | |
605 | port->status |= ISI_DCD; | |
606 | wake_up_interruptible(&port->open_wait); | |
1da177e4 | 607 | } |
a547dfe9 | 608 | } else { |
d8d16e47 JS |
609 | if (header & ISI_DCD) |
610 | port->status |= ISI_DCD; | |
611 | else | |
612 | port->status &= ~ISI_DCD; | |
613 | } | |
614 | ||
615 | if (port->flags & ASYNC_CTS_FLOW) { | |
616 | if (port->tty->hw_stopped) { | |
617 | if (header & ISI_CTS) { | |
618 | port->tty->hw_stopped = 0; | |
619 | /* start tx ing */ | |
a547dfe9 JS |
620 | port->status |= (ISI_TXOK |
621 | | ISI_CTS); | |
0aa5de85 | 622 | tty_wakeup(tty); |
1da177e4 | 623 | } |
a547dfe9 JS |
624 | } else if (!(header & ISI_CTS)) { |
625 | port->tty->hw_stopped = 1; | |
626 | /* stop tx ing */ | |
627 | port->status &= ~(ISI_TXOK | ISI_CTS); | |
1da177e4 | 628 | } |
a547dfe9 | 629 | } else { |
d8d16e47 JS |
630 | if (header & ISI_CTS) |
631 | port->status |= ISI_CTS; | |
1da177e4 | 632 | else |
d8d16e47 JS |
633 | port->status &= ~ISI_CTS; |
634 | } | |
635 | ||
636 | if (header & ISI_DSR) | |
637 | port->status |= ISI_DSR; | |
638 | else | |
639 | port->status &= ~ISI_DSR; | |
640 | ||
641 | if (header & ISI_RI) | |
642 | port->status |= ISI_RI; | |
643 | else | |
644 | port->status &= ~ISI_RI; | |
645 | ||
646 | break; | |
647 | ||
a547dfe9 | 648 | case 1: /* Received Break !!! */ |
d8d16e47 JS |
649 | tty_insert_flip_char(tty, 0, TTY_BREAK); |
650 | if (port->flags & ASYNC_SAK) | |
651 | do_SAK(tty); | |
652 | tty_flip_buffer_push(tty); | |
653 | break; | |
654 | ||
655 | case 2: /* Statistics */ | |
aaa246ea | 656 | pr_dbg("isicom_interrupt: stats!!!.\n"); |
d8d16e47 JS |
657 | break; |
658 | ||
659 | default: | |
aaa246ea | 660 | pr_dbg("Intr: Unknown code in status packet.\n"); |
d8d16e47 JS |
661 | break; |
662 | } | |
a547dfe9 | 663 | } else { /* Data Packet */ |
33f0f88f AC |
664 | |
665 | count = tty_prepare_flip_string(tty, &rp, byte_count & ~1); | |
aaa246ea | 666 | pr_dbg("Intr: Can rx %d of %d bytes.\n", count, byte_count); |
1da177e4 | 667 | word_count = count >> 1; |
33f0f88f | 668 | insw(base, rp, word_count); |
1da177e4 LT |
669 | byte_count -= (word_count << 1); |
670 | if (count & 0x0001) { | |
a547dfe9 JS |
671 | tty_insert_flip_char(tty, inw(base) & 0xff, |
672 | TTY_NORMAL); | |
1da177e4 | 673 | byte_count -= 2; |
d8d16e47 | 674 | } |
1da177e4 | 675 | if (byte_count > 0) { |
aaa246ea JS |
676 | pr_dbg("Intr(0x%lx:%d): Flip buffer overflow! dropping " |
677 | "bytes...\n", base, channel + 1); | |
1da177e4 LT |
678 | while(byte_count > 0) { /* drain out unread xtra data */ |
679 | inw(base); | |
680 | byte_count -= 2; | |
681 | } | |
682 | } | |
33f0f88f | 683 | tty_flip_buffer_push(tty); |
1da177e4 | 684 | } |
18234f88 | 685 | outw(0x0000, base+0x04); /* enable interrupts */ |
174f1307 | 686 | spin_unlock(&card->card_lock); |
a547dfe9 | 687 | |
1da177e4 | 688 | return IRQ_HANDLED; |
d8d16e47 | 689 | } |
1da177e4 | 690 | |
d8d16e47 | 691 | static void isicom_config_port(struct isi_port *port) |
1da177e4 | 692 | { |
d8d16e47 JS |
693 | struct isi_board *card = port->card; |
694 | struct tty_struct *tty; | |
1da177e4 | 695 | unsigned long baud; |
8070e35c JS |
696 | unsigned long base = card->base; |
697 | u16 channel_setup, channel = port->channel, | |
698 | shift_count = card->shift_count; | |
1da177e4 | 699 | unsigned char flow_ctrl; |
d8d16e47 | 700 | |
1da177e4 LT |
701 | if (!(tty = port->tty) || !tty->termios) |
702 | return; | |
703 | baud = C_BAUD(tty); | |
704 | if (baud & CBAUDEX) { | |
705 | baud &= ~CBAUDEX; | |
d8d16e47 | 706 | |
1da177e4 LT |
707 | /* if CBAUDEX bit is on and the baud is set to either 50 or 75 |
708 | * then the card is programmed for 57.6Kbps or 115Kbps | |
709 | * respectively. | |
d8d16e47 JS |
710 | */ |
711 | ||
7edc136a JS |
712 | /* 1,2,3,4 => 57.6, 115.2, 230, 460 kbps resp. */ |
713 | if (baud < 1 || baud > 4) | |
1da177e4 LT |
714 | port->tty->termios->c_cflag &= ~CBAUDEX; |
715 | else | |
716 | baud += 15; | |
d8d16e47 | 717 | } |
1da177e4 | 718 | if (baud == 15) { |
d8d16e47 JS |
719 | |
720 | /* the ASYNC_SPD_HI and ASYNC_SPD_VHI options are set | |
1da177e4 LT |
721 | * by the set_serial_info ioctl ... this is done by |
722 | * the 'setserial' utility. | |
d8d16e47 JS |
723 | */ |
724 | ||
1da177e4 | 725 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) |
d8d16e47 | 726 | baud++; /* 57.6 Kbps */ |
1da177e4 | 727 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) |
d8d16e47 | 728 | baud +=2; /* 115 Kbps */ |
7edc136a JS |
729 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) |
730 | baud += 3; /* 230 kbps*/ | |
731 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) | |
732 | baud += 4; /* 460 kbps*/ | |
1da177e4 LT |
733 | } |
734 | if (linuxb_to_isib[baud] == -1) { | |
735 | /* hang up */ | |
d8d16e47 JS |
736 | drop_dtr(port); |
737 | return; | |
738 | } | |
739 | else | |
1da177e4 | 740 | raise_dtr(port); |
d8d16e47 | 741 | |
cfe7c09a | 742 | if (WaitTillCardIsFree(base) == 0) { |
1da177e4 LT |
743 | outw(0x8000 | (channel << shift_count) |0x03, base); |
744 | outw(linuxb_to_isib[baud] << 8 | 0x03, base); | |
745 | channel_setup = 0; | |
746 | switch(C_CSIZE(tty)) { | |
d8d16e47 JS |
747 | case CS5: |
748 | channel_setup |= ISICOM_CS5; | |
749 | break; | |
750 | case CS6: | |
751 | channel_setup |= ISICOM_CS6; | |
752 | break; | |
753 | case CS7: | |
754 | channel_setup |= ISICOM_CS7; | |
755 | break; | |
756 | case CS8: | |
757 | channel_setup |= ISICOM_CS8; | |
758 | break; | |
1da177e4 | 759 | } |
d8d16e47 | 760 | |
1da177e4 LT |
761 | if (C_CSTOPB(tty)) |
762 | channel_setup |= ISICOM_2SB; | |
763 | if (C_PARENB(tty)) { | |
764 | channel_setup |= ISICOM_EVPAR; | |
765 | if (C_PARODD(tty)) | |
d8d16e47 | 766 | channel_setup |= ISICOM_ODPAR; |
1da177e4 | 767 | } |
d8d16e47 | 768 | outw(channel_setup, base); |
1da177e4 | 769 | InterruptTheCard(base); |
d8d16e47 | 770 | } |
1da177e4 LT |
771 | if (C_CLOCAL(tty)) |
772 | port->flags &= ~ASYNC_CHECK_CD; | |
773 | else | |
d8d16e47 JS |
774 | port->flags |= ASYNC_CHECK_CD; |
775 | ||
1da177e4 LT |
776 | /* flow control settings ...*/ |
777 | flow_ctrl = 0; | |
778 | port->flags &= ~ASYNC_CTS_FLOW; | |
779 | if (C_CRTSCTS(tty)) { | |
780 | port->flags |= ASYNC_CTS_FLOW; | |
781 | flow_ctrl |= ISICOM_CTSRTS; | |
d8d16e47 JS |
782 | } |
783 | if (I_IXON(tty)) | |
1da177e4 LT |
784 | flow_ctrl |= ISICOM_RESPOND_XONXOFF; |
785 | if (I_IXOFF(tty)) | |
d8d16e47 JS |
786 | flow_ctrl |= ISICOM_INITIATE_XONXOFF; |
787 | ||
cfe7c09a | 788 | if (WaitTillCardIsFree(base) == 0) { |
1da177e4 LT |
789 | outw(0x8000 | (channel << shift_count) |0x04, base); |
790 | outw(flow_ctrl << 8 | 0x05, base); | |
791 | outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base); | |
792 | InterruptTheCard(base); | |
1da177e4 | 793 | } |
d8d16e47 | 794 | |
1da177e4 LT |
795 | /* rx enabled -> enable port for rx on the card */ |
796 | if (C_CREAD(tty)) { | |
797 | card->port_status |= (1 << channel); | |
798 | outw(card->port_status, base + 0x02); | |
799 | } | |
800 | } | |
1da177e4 | 801 | |
d8d16e47 JS |
802 | /* open et all */ |
803 | ||
804 | static inline void isicom_setup_board(struct isi_board *bp) | |
1da177e4 LT |
805 | { |
806 | int channel; | |
d8d16e47 | 807 | struct isi_port *port; |
1da177e4 | 808 | unsigned long flags; |
d8d16e47 | 809 | |
1da177e4 LT |
810 | spin_lock_irqsave(&bp->card_lock, flags); |
811 | if (bp->status & BOARD_ACTIVE) { | |
812 | spin_unlock_irqrestore(&bp->card_lock, flags); | |
813 | return; | |
814 | } | |
815 | port = bp->ports; | |
816 | bp->status |= BOARD_ACTIVE; | |
d8d16e47 | 817 | for (channel = 0; channel < bp->port_count; channel++, port++) |
1da177e4 | 818 | drop_dtr_rts(port); |
cfe7c09a | 819 | spin_unlock_irqrestore(&bp->card_lock, flags); |
1da177e4 | 820 | } |
d8d16e47 JS |
821 | |
822 | static int isicom_setup_port(struct isi_port *port) | |
1da177e4 | 823 | { |
d8d16e47 | 824 | struct isi_board *card = port->card; |
1da177e4 | 825 | unsigned long flags; |
d8d16e47 | 826 | |
1da177e4 LT |
827 | if (port->flags & ASYNC_INITIALIZED) { |
828 | return 0; | |
829 | } | |
830 | if (!port->xmit_buf) { | |
831 | unsigned long page; | |
d8d16e47 | 832 | |
1da177e4 LT |
833 | if (!(page = get_zeroed_page(GFP_KERNEL))) |
834 | return -ENOMEM; | |
d8d16e47 | 835 | |
1da177e4 LT |
836 | if (port->xmit_buf) { |
837 | free_page(page); | |
838 | return -ERESTARTSYS; | |
839 | } | |
d8d16e47 JS |
840 | port->xmit_buf = (unsigned char *) page; |
841 | } | |
1da177e4 LT |
842 | |
843 | spin_lock_irqsave(&card->card_lock, flags); | |
844 | if (port->tty) | |
845 | clear_bit(TTY_IO_ERROR, &port->tty->flags); | |
846 | if (port->count == 1) | |
847 | card->count++; | |
d8d16e47 | 848 | |
1da177e4 | 849 | port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; |
d8d16e47 | 850 | |
1da177e4 | 851 | /* discard any residual data */ |
cfe7c09a JS |
852 | if (WaitTillCardIsFree(card->base) == 0) { |
853 | outw(0x8000 | (port->channel << card->shift_count) | 0x02, | |
854 | card->base); | |
855 | outw(((ISICOM_KILLTX | ISICOM_KILLRX) << 8) | 0x06, card->base); | |
856 | InterruptTheCard(card->base); | |
857 | } | |
d8d16e47 | 858 | |
1da177e4 LT |
859 | isicom_config_port(port); |
860 | port->flags |= ASYNC_INITIALIZED; | |
861 | spin_unlock_irqrestore(&card->card_lock, flags); | |
d8d16e47 JS |
862 | |
863 | return 0; | |
864 | } | |
865 | ||
a547dfe9 JS |
866 | static int block_til_ready(struct tty_struct *tty, struct file *filp, |
867 | struct isi_port *port) | |
1da177e4 | 868 | { |
d8d16e47 | 869 | struct isi_board *card = port->card; |
1da177e4 LT |
870 | int do_clocal = 0, retval; |
871 | unsigned long flags; | |
872 | DECLARE_WAITQUEUE(wait, current); | |
873 | ||
874 | /* block if port is in the process of being closed */ | |
875 | ||
876 | if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) { | |
aaa246ea | 877 | pr_dbg("block_til_ready: close in progress.\n"); |
1da177e4 LT |
878 | interruptible_sleep_on(&port->close_wait); |
879 | if (port->flags & ASYNC_HUP_NOTIFY) | |
880 | return -EAGAIN; | |
881 | else | |
882 | return -ERESTARTSYS; | |
883 | } | |
d8d16e47 | 884 | |
1da177e4 | 885 | /* if non-blocking mode is set ... */ |
d8d16e47 | 886 | |
a547dfe9 JS |
887 | if ((filp->f_flags & O_NONBLOCK) || |
888 | (tty->flags & (1 << TTY_IO_ERROR))) { | |
aaa246ea | 889 | pr_dbg("block_til_ready: non-block mode.\n"); |
1da177e4 | 890 | port->flags |= ASYNC_NORMAL_ACTIVE; |
d8d16e47 JS |
891 | return 0; |
892 | } | |
893 | ||
1da177e4 LT |
894 | if (C_CLOCAL(tty)) |
895 | do_clocal = 1; | |
d8d16e47 JS |
896 | |
897 | /* block waiting for DCD to be asserted, and while | |
1da177e4 LT |
898 | callout dev is busy */ |
899 | retval = 0; | |
900 | add_wait_queue(&port->open_wait, &wait); | |
901 | ||
902 | spin_lock_irqsave(&card->card_lock, flags); | |
903 | if (!tty_hung_up_p(filp)) | |
904 | port->count--; | |
905 | port->blocked_open++; | |
906 | spin_unlock_irqrestore(&card->card_lock, flags); | |
d8d16e47 | 907 | |
1da177e4 LT |
908 | while (1) { |
909 | raise_dtr_rts(port); | |
910 | ||
911 | set_current_state(TASK_INTERRUPTIBLE); | |
d8d16e47 | 912 | if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) { |
1da177e4 LT |
913 | if (port->flags & ASYNC_HUP_NOTIFY) |
914 | retval = -EAGAIN; | |
915 | else | |
916 | retval = -ERESTARTSYS; | |
917 | break; | |
d8d16e47 | 918 | } |
1da177e4 | 919 | if (!(port->flags & ASYNC_CLOSING) && |
d8d16e47 | 920 | (do_clocal || (port->status & ISI_DCD))) { |
1da177e4 | 921 | break; |
d8d16e47 | 922 | } |
1da177e4 LT |
923 | if (signal_pending(current)) { |
924 | retval = -ERESTARTSYS; | |
925 | break; | |
926 | } | |
d8d16e47 | 927 | schedule(); |
1da177e4 LT |
928 | } |
929 | set_current_state(TASK_RUNNING); | |
930 | remove_wait_queue(&port->open_wait, &wait); | |
931 | spin_lock_irqsave(&card->card_lock, flags); | |
932 | if (!tty_hung_up_p(filp)) | |
933 | port->count++; | |
934 | port->blocked_open--; | |
935 | spin_unlock_irqrestore(&card->card_lock, flags); | |
936 | if (retval) | |
937 | return retval; | |
938 | port->flags |= ASYNC_NORMAL_ACTIVE; | |
939 | return 0; | |
940 | } | |
d8d16e47 JS |
941 | |
942 | static int isicom_open(struct tty_struct *tty, struct file *filp) | |
1da177e4 | 943 | { |
d8d16e47 JS |
944 | struct isi_port *port; |
945 | struct isi_board *card; | |
17c4edf0 JS |
946 | unsigned int board; |
947 | int error, line; | |
1da177e4 LT |
948 | |
949 | line = tty->index; | |
950 | if (line < 0 || line > PORT_COUNT-1) | |
951 | return -ENODEV; | |
952 | board = BOARD(line); | |
953 | card = &isi_card[board]; | |
d8d16e47 | 954 | |
1da177e4 LT |
955 | if (!(card->status & FIRMWARE_LOADED)) |
956 | return -ENODEV; | |
d8d16e47 | 957 | |
1da177e4 LT |
958 | /* open on a port greater than the port count for the card !!! */ |
959 | if (line > ((board * 16) + card->port_count - 1)) | |
960 | return -ENODEV; | |
961 | ||
d8d16e47 | 962 | port = &isi_ports[line]; |
1da177e4 LT |
963 | if (isicom_paranoia_check(port, tty->name, "isicom_open")) |
964 | return -ENODEV; | |
d8d16e47 JS |
965 | |
966 | isicom_setup_board(card); | |
967 | ||
1da177e4 LT |
968 | port->count++; |
969 | tty->driver_data = port; | |
970 | port->tty = tty; | |
971 | if ((error = isicom_setup_port(port))!=0) | |
972 | return error; | |
973 | if ((error = block_til_ready(tty, filp, port))!=0) | |
974 | return error; | |
975 | ||
d8d16e47 | 976 | return 0; |
1da177e4 | 977 | } |
d8d16e47 | 978 | |
1da177e4 LT |
979 | /* close et all */ |
980 | ||
d8d16e47 | 981 | static inline void isicom_shutdown_board(struct isi_board *bp) |
1da177e4 | 982 | { |
1da177e4 LT |
983 | if (bp->status & BOARD_ACTIVE) { |
984 | bp->status &= ~BOARD_ACTIVE; | |
985 | } | |
1da177e4 LT |
986 | } |
987 | ||
cfe7c09a | 988 | /* card->lock HAS to be held */ |
d8d16e47 | 989 | static void isicom_shutdown_port(struct isi_port *port) |
1da177e4 | 990 | { |
d8d16e47 JS |
991 | struct isi_board *card = port->card; |
992 | struct tty_struct *tty; | |
d8d16e47 | 993 | |
1da177e4 LT |
994 | tty = port->tty; |
995 | ||
cfe7c09a | 996 | if (!(port->flags & ASYNC_INITIALIZED)) |
1da177e4 | 997 | return; |
cfe7c09a | 998 | |
1da177e4 LT |
999 | if (port->xmit_buf) { |
1000 | free_page((unsigned long) port->xmit_buf); | |
1001 | port->xmit_buf = NULL; | |
d8d16e47 | 1002 | } |
1da177e4 LT |
1003 | port->flags &= ~ASYNC_INITIALIZED; |
1004 | /* 3rd October 2000 : Vinayak P Risbud */ | |
1005 | port->tty = NULL; | |
d8d16e47 | 1006 | |
1da177e4 LT |
1007 | /*Fix done by Anil .S on 30-04-2001 |
1008 | remote login through isi port has dtr toggle problem | |
1009 | due to which the carrier drops before the password prompt | |
d8d16e47 | 1010 | appears on the remote end. Now we drop the dtr only if the |
1da177e4 | 1011 | HUPCL(Hangup on close) flag is set for the tty*/ |
d8d16e47 JS |
1012 | |
1013 | if (C_HUPCL(tty)) | |
1da177e4 LT |
1014 | /* drop dtr on this port */ |
1015 | drop_dtr(port); | |
d8d16e47 JS |
1016 | |
1017 | /* any other port uninits */ | |
1da177e4 LT |
1018 | if (tty) |
1019 | set_bit(TTY_IO_ERROR, &tty->flags); | |
d8d16e47 | 1020 | |
1da177e4 | 1021 | if (--card->count < 0) { |
aaa246ea | 1022 | pr_dbg("isicom_shutdown_port: bad board(0x%lx) count %d.\n", |
1da177e4 | 1023 | card->base, card->count); |
d8d16e47 | 1024 | card->count = 0; |
1da177e4 | 1025 | } |
d8d16e47 | 1026 | |
a547dfe9 | 1027 | /* last port was closed, shutdown that boad too */ |
d8d16e47 | 1028 | if (C_HUPCL(tty)) { |
1da177e4 LT |
1029 | if (!card->count) |
1030 | isicom_shutdown_board(card); | |
1031 | } | |
1032 | } | |
1033 | ||
d8d16e47 | 1034 | static void isicom_close(struct tty_struct *tty, struct file *filp) |
1da177e4 | 1035 | { |
8070e35c | 1036 | struct isi_port *port = tty->driver_data; |
c387fd85 | 1037 | struct isi_board *card; |
1da177e4 | 1038 | unsigned long flags; |
d8d16e47 | 1039 | |
1da177e4 LT |
1040 | if (!port) |
1041 | return; | |
c387fd85 | 1042 | card = port->card; |
1da177e4 LT |
1043 | if (isicom_paranoia_check(port, tty->name, "isicom_close")) |
1044 | return; | |
d8d16e47 | 1045 | |
aaa246ea | 1046 | pr_dbg("Close start!!!.\n"); |
d8d16e47 | 1047 | |
1da177e4 LT |
1048 | spin_lock_irqsave(&card->card_lock, flags); |
1049 | if (tty_hung_up_p(filp)) { | |
1050 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1051 | return; | |
1052 | } | |
d8d16e47 | 1053 | |
1da177e4 | 1054 | if (tty->count == 1 && port->count != 1) { |
a547dfe9 JS |
1055 | printk(KERN_WARNING "ISICOM:(0x%lx) isicom_close: bad port " |
1056 | "count tty->count = 1 port count = %d.\n", | |
1da177e4 LT |
1057 | card->base, port->count); |
1058 | port->count = 1; | |
1059 | } | |
1060 | if (--port->count < 0) { | |
a547dfe9 JS |
1061 | printk(KERN_WARNING "ISICOM:(0x%lx) isicom_close: bad port " |
1062 | "count for channel%d = %d", card->base, port->channel, | |
1da177e4 | 1063 | port->count); |
d8d16e47 | 1064 | port->count = 0; |
1da177e4 | 1065 | } |
d8d16e47 | 1066 | |
1da177e4 LT |
1067 | if (port->count) { |
1068 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1069 | return; | |
d8d16e47 | 1070 | } |
1da177e4 LT |
1071 | port->flags |= ASYNC_CLOSING; |
1072 | tty->closing = 1; | |
1073 | spin_unlock_irqrestore(&card->card_lock, flags); | |
d8d16e47 | 1074 | |
1da177e4 LT |
1075 | if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE) |
1076 | tty_wait_until_sent(tty, port->closing_wait); | |
d8d16e47 | 1077 | /* indicate to the card that no more data can be received |
1da177e4 LT |
1078 | on this port */ |
1079 | spin_lock_irqsave(&card->card_lock, flags); | |
d8d16e47 | 1080 | if (port->flags & ASYNC_INITIALIZED) { |
1da177e4 LT |
1081 | card->port_status &= ~(1 << port->channel); |
1082 | outw(card->port_status, card->base + 0x02); | |
d8d16e47 | 1083 | } |
1da177e4 LT |
1084 | isicom_shutdown_port(port); |
1085 | spin_unlock_irqrestore(&card->card_lock, flags); | |
d8d16e47 | 1086 | |
1da177e4 LT |
1087 | if (tty->driver->flush_buffer) |
1088 | tty->driver->flush_buffer(tty); | |
1089 | tty_ldisc_flush(tty); | |
1090 | ||
1091 | spin_lock_irqsave(&card->card_lock, flags); | |
1092 | tty->closing = 0; | |
1093 | ||
1094 | if (port->blocked_open) { | |
1095 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1096 | if (port->close_delay) { | |
aaa246ea | 1097 | pr_dbg("scheduling until time out.\n"); |
a547dfe9 JS |
1098 | msleep_interruptible( |
1099 | jiffies_to_msecs(port->close_delay)); | |
1da177e4 LT |
1100 | } |
1101 | spin_lock_irqsave(&card->card_lock, flags); | |
1102 | wake_up_interruptible(&port->open_wait); | |
d8d16e47 | 1103 | } |
1da177e4 LT |
1104 | port->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING); |
1105 | wake_up_interruptible(&port->close_wait); | |
1106 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1107 | } | |
1108 | ||
1109 | /* write et all */ | |
d8d16e47 JS |
1110 | static int isicom_write(struct tty_struct *tty, const unsigned char *buf, |
1111 | int count) | |
1da177e4 | 1112 | { |
8070e35c | 1113 | struct isi_port *port = tty->driver_data; |
d8d16e47 | 1114 | struct isi_board *card = port->card; |
1da177e4 LT |
1115 | unsigned long flags; |
1116 | int cnt, total = 0; | |
1117 | ||
1118 | if (isicom_paranoia_check(port, tty->name, "isicom_write")) | |
1119 | return 0; | |
d8d16e47 | 1120 | |
326f28e9 | 1121 | if (!port->xmit_buf) |
1da177e4 | 1122 | return 0; |
d8d16e47 | 1123 | |
1da177e4 | 1124 | spin_lock_irqsave(&card->card_lock, flags); |
d8d16e47 JS |
1125 | |
1126 | while(1) { | |
a547dfe9 JS |
1127 | cnt = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt |
1128 | - 1, SERIAL_XMIT_SIZE - port->xmit_head)); | |
d8d16e47 | 1129 | if (cnt <= 0) |
1da177e4 | 1130 | break; |
d8d16e47 | 1131 | |
1da177e4 | 1132 | memcpy(port->xmit_buf + port->xmit_head, buf, cnt); |
a547dfe9 JS |
1133 | port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE |
1134 | - 1); | |
1da177e4 LT |
1135 | port->xmit_cnt += cnt; |
1136 | buf += cnt; | |
1137 | count -= cnt; | |
1138 | total += cnt; | |
d8d16e47 | 1139 | } |
1da177e4 LT |
1140 | if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped) |
1141 | port->status |= ISI_TXOK; | |
1142 | spin_unlock_irqrestore(&card->card_lock, flags); | |
d8d16e47 | 1143 | return total; |
1da177e4 LT |
1144 | } |
1145 | ||
1146 | /* put_char et all */ | |
d8d16e47 | 1147 | static void isicom_put_char(struct tty_struct *tty, unsigned char ch) |
1da177e4 | 1148 | { |
8070e35c | 1149 | struct isi_port *port = tty->driver_data; |
d8d16e47 | 1150 | struct isi_board *card = port->card; |
1da177e4 | 1151 | unsigned long flags; |
d8d16e47 | 1152 | |
1da177e4 LT |
1153 | if (isicom_paranoia_check(port, tty->name, "isicom_put_char")) |
1154 | return; | |
d8d16e47 | 1155 | |
326f28e9 | 1156 | if (!port->xmit_buf) |
1da177e4 LT |
1157 | return; |
1158 | ||
1159 | spin_lock_irqsave(&card->card_lock, flags); | |
1160 | if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) { | |
1161 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1162 | return; | |
1163 | } | |
d8d16e47 | 1164 | |
1da177e4 LT |
1165 | port->xmit_buf[port->xmit_head++] = ch; |
1166 | port->xmit_head &= (SERIAL_XMIT_SIZE - 1); | |
1167 | port->xmit_cnt++; | |
1168 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1169 | } | |
1170 | ||
1171 | /* flush_chars et all */ | |
d8d16e47 | 1172 | static void isicom_flush_chars(struct tty_struct *tty) |
1da177e4 | 1173 | { |
8070e35c | 1174 | struct isi_port *port = tty->driver_data; |
d8d16e47 | 1175 | |
1da177e4 LT |
1176 | if (isicom_paranoia_check(port, tty->name, "isicom_flush_chars")) |
1177 | return; | |
d8d16e47 | 1178 | |
a547dfe9 JS |
1179 | if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped || |
1180 | !port->xmit_buf) | |
1da177e4 | 1181 | return; |
d8d16e47 | 1182 | |
1da177e4 LT |
1183 | /* this tells the transmitter to consider this port for |
1184 | data output to the card ... that's the best we can do. */ | |
d8d16e47 | 1185 | port->status |= ISI_TXOK; |
1da177e4 LT |
1186 | } |
1187 | ||
1188 | /* write_room et all */ | |
d8d16e47 | 1189 | static int isicom_write_room(struct tty_struct *tty) |
1da177e4 | 1190 | { |
8070e35c | 1191 | struct isi_port *port = tty->driver_data; |
1da177e4 LT |
1192 | int free; |
1193 | ||
1194 | if (isicom_paranoia_check(port, tty->name, "isicom_write_room")) | |
1195 | return 0; | |
d8d16e47 | 1196 | |
1da177e4 LT |
1197 | free = SERIAL_XMIT_SIZE - port->xmit_cnt - 1; |
1198 | if (free < 0) | |
1199 | free = 0; | |
1200 | return free; | |
1201 | } | |
1202 | ||
1203 | /* chars_in_buffer et all */ | |
d8d16e47 | 1204 | static int isicom_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 1205 | { |
8070e35c | 1206 | struct isi_port *port = tty->driver_data; |
1da177e4 LT |
1207 | if (isicom_paranoia_check(port, tty->name, "isicom_chars_in_buffer")) |
1208 | return 0; | |
1209 | return port->xmit_cnt; | |
1210 | } | |
1211 | ||
1212 | /* ioctl et all */ | |
a547dfe9 JS |
1213 | static inline void isicom_send_break(struct isi_port *port, |
1214 | unsigned long length) | |
1da177e4 | 1215 | { |
d8d16e47 | 1216 | struct isi_board *card = port->card; |
8070e35c | 1217 | unsigned long base = card->base; |
d8d16e47 JS |
1218 | |
1219 | if (!lock_card(card)) | |
1da177e4 | 1220 | return; |
d8d16e47 | 1221 | |
1da177e4 LT |
1222 | outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base); |
1223 | outw((length & 0xff) << 8 | 0x00, base); | |
1224 | outw((length & 0xff00), base); | |
1225 | InterruptTheCard(base); | |
1226 | ||
1227 | unlock_card(card); | |
1228 | } | |
1229 | ||
1230 | static int isicom_tiocmget(struct tty_struct *tty, struct file *file) | |
1231 | { | |
8070e35c | 1232 | struct isi_port *port = tty->driver_data; |
1da177e4 | 1233 | /* just send the port status */ |
8070e35c | 1234 | u16 status = port->status; |
1da177e4 LT |
1235 | |
1236 | if (isicom_paranoia_check(port, tty->name, "isicom_ioctl")) | |
1237 | return -ENODEV; | |
d8d16e47 | 1238 | |
1da177e4 LT |
1239 | return ((status & ISI_RTS) ? TIOCM_RTS : 0) | |
1240 | ((status & ISI_DTR) ? TIOCM_DTR : 0) | | |
1241 | ((status & ISI_DCD) ? TIOCM_CAR : 0) | | |
1242 | ((status & ISI_DSR) ? TIOCM_DSR : 0) | | |
1243 | ((status & ISI_CTS) ? TIOCM_CTS : 0) | | |
1244 | ((status & ISI_RI ) ? TIOCM_RI : 0); | |
1245 | } | |
1246 | ||
1247 | static int isicom_tiocmset(struct tty_struct *tty, struct file *file, | |
d8d16e47 | 1248 | unsigned int set, unsigned int clear) |
1da177e4 | 1249 | { |
8070e35c | 1250 | struct isi_port *port = tty->driver_data; |
cfe7c09a | 1251 | unsigned long flags; |
d8d16e47 | 1252 | |
1da177e4 LT |
1253 | if (isicom_paranoia_check(port, tty->name, "isicom_ioctl")) |
1254 | return -ENODEV; | |
d8d16e47 | 1255 | |
cfe7c09a | 1256 | spin_lock_irqsave(&port->card->card_lock, flags); |
1da177e4 LT |
1257 | if (set & TIOCM_RTS) |
1258 | raise_rts(port); | |
1259 | if (set & TIOCM_DTR) | |
1260 | raise_dtr(port); | |
1261 | ||
1262 | if (clear & TIOCM_RTS) | |
1263 | drop_rts(port); | |
1264 | if (clear & TIOCM_DTR) | |
1265 | drop_dtr(port); | |
cfe7c09a | 1266 | spin_unlock_irqrestore(&port->card->card_lock, flags); |
1da177e4 LT |
1267 | |
1268 | return 0; | |
d8d16e47 | 1269 | } |
1da177e4 | 1270 | |
d8d16e47 JS |
1271 | static int isicom_set_serial_info(struct isi_port *port, |
1272 | struct serial_struct __user *info) | |
1da177e4 LT |
1273 | { |
1274 | struct serial_struct newinfo; | |
1275 | int reconfig_port; | |
1276 | ||
d8d16e47 | 1277 | if (copy_from_user(&newinfo, info, sizeof(newinfo))) |
1da177e4 | 1278 | return -EFAULT; |
d8d16e47 JS |
1279 | |
1280 | reconfig_port = ((port->flags & ASYNC_SPD_MASK) != | |
1281 | (newinfo.flags & ASYNC_SPD_MASK)); | |
1282 | ||
1da177e4 LT |
1283 | if (!capable(CAP_SYS_ADMIN)) { |
1284 | if ((newinfo.close_delay != port->close_delay) || | |
d8d16e47 JS |
1285 | (newinfo.closing_wait != port->closing_wait) || |
1286 | ((newinfo.flags & ~ASYNC_USR_MASK) != | |
1287 | (port->flags & ~ASYNC_USR_MASK))) | |
1da177e4 LT |
1288 | return -EPERM; |
1289 | port->flags = ((port->flags & ~ ASYNC_USR_MASK) | | |
1290 | (newinfo.flags & ASYNC_USR_MASK)); | |
d8d16e47 | 1291 | } |
1da177e4 LT |
1292 | else { |
1293 | port->close_delay = newinfo.close_delay; | |
d8d16e47 JS |
1294 | port->closing_wait = newinfo.closing_wait; |
1295 | port->flags = ((port->flags & ~ASYNC_FLAGS) | | |
1da177e4 LT |
1296 | (newinfo.flags & ASYNC_FLAGS)); |
1297 | } | |
1298 | if (reconfig_port) { | |
cfe7c09a JS |
1299 | unsigned long flags; |
1300 | spin_lock_irqsave(&port->card->card_lock, flags); | |
1da177e4 | 1301 | isicom_config_port(port); |
cfe7c09a | 1302 | spin_unlock_irqrestore(&port->card->card_lock, flags); |
1da177e4 | 1303 | } |
d8d16e47 JS |
1304 | return 0; |
1305 | } | |
1da177e4 | 1306 | |
d8d16e47 JS |
1307 | static int isicom_get_serial_info(struct isi_port *port, |
1308 | struct serial_struct __user *info) | |
1da177e4 LT |
1309 | { |
1310 | struct serial_struct out_info; | |
d8d16e47 | 1311 | |
1da177e4 LT |
1312 | memset(&out_info, 0, sizeof(out_info)); |
1313 | /* out_info.type = ? */ | |
1314 | out_info.line = port - isi_ports; | |
1315 | out_info.port = port->card->base; | |
1316 | out_info.irq = port->card->irq; | |
1317 | out_info.flags = port->flags; | |
1318 | /* out_info.baud_base = ? */ | |
1319 | out_info.close_delay = port->close_delay; | |
1320 | out_info.closing_wait = port->closing_wait; | |
d8d16e47 | 1321 | if (copy_to_user(info, &out_info, sizeof(out_info))) |
1da177e4 LT |
1322 | return -EFAULT; |
1323 | return 0; | |
d8d16e47 | 1324 | } |
1da177e4 | 1325 | |
d8d16e47 JS |
1326 | static int isicom_ioctl(struct tty_struct *tty, struct file *filp, |
1327 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1328 | { |
8070e35c | 1329 | struct isi_port *port = tty->driver_data; |
1da177e4 LT |
1330 | void __user *argp = (void __user *)arg; |
1331 | int retval; | |
1332 | ||
1333 | if (isicom_paranoia_check(port, tty->name, "isicom_ioctl")) | |
1334 | return -ENODEV; | |
1335 | ||
1336 | switch(cmd) { | |
d8d16e47 JS |
1337 | case TCSBRK: |
1338 | retval = tty_check_change(tty); | |
1339 | if (retval) | |
1340 | return retval; | |
1341 | tty_wait_until_sent(tty, 0); | |
1342 | if (!arg) | |
1343 | isicom_send_break(port, HZ/4); | |
1344 | return 0; | |
1345 | ||
1346 | case TCSBRKP: | |
1347 | retval = tty_check_change(tty); | |
1348 | if (retval) | |
1349 | return retval; | |
1350 | tty_wait_until_sent(tty, 0); | |
1351 | isicom_send_break(port, arg ? arg * (HZ/10) : HZ/4); | |
1352 | return 0; | |
1353 | ||
1354 | case TIOCGSOFTCAR: | |
a547dfe9 JS |
1355 | return put_user(C_CLOCAL(tty) ? 1 : 0, |
1356 | (unsigned long __user *)argp); | |
d8d16e47 JS |
1357 | |
1358 | case TIOCSSOFTCAR: | |
1359 | if (get_user(arg, (unsigned long __user *) argp)) | |
1360 | return -EFAULT; | |
1361 | tty->termios->c_cflag = | |
1362 | ((tty->termios->c_cflag & ~CLOCAL) | | |
1363 | (arg ? CLOCAL : 0)); | |
1364 | return 0; | |
1365 | ||
1366 | case TIOCGSERIAL: | |
1367 | return isicom_get_serial_info(port, argp); | |
1368 | ||
1369 | case TIOCSSERIAL: | |
1370 | return isicom_set_serial_info(port, argp); | |
1371 | ||
1372 | default: | |
1373 | return -ENOIOCTLCMD; | |
1da177e4 LT |
1374 | } |
1375 | return 0; | |
1376 | } | |
1377 | ||
1378 | /* set_termios et all */ | |
d8d16e47 | 1379 | static void isicom_set_termios(struct tty_struct *tty, |
606d099c | 1380 | struct ktermios *old_termios) |
1da177e4 | 1381 | { |
8070e35c | 1382 | struct isi_port *port = tty->driver_data; |
cfe7c09a | 1383 | unsigned long flags; |
d8d16e47 | 1384 | |
1da177e4 LT |
1385 | if (isicom_paranoia_check(port, tty->name, "isicom_set_termios")) |
1386 | return; | |
d8d16e47 | 1387 | |
1da177e4 | 1388 | if (tty->termios->c_cflag == old_termios->c_cflag && |
d8d16e47 | 1389 | tty->termios->c_iflag == old_termios->c_iflag) |
1da177e4 | 1390 | return; |
d8d16e47 | 1391 | |
cfe7c09a | 1392 | spin_lock_irqsave(&port->card->card_lock, flags); |
1da177e4 | 1393 | isicom_config_port(port); |
cfe7c09a | 1394 | spin_unlock_irqrestore(&port->card->card_lock, flags); |
d8d16e47 | 1395 | |
1da177e4 | 1396 | if ((old_termios->c_cflag & CRTSCTS) && |
d8d16e47 | 1397 | !(tty->termios->c_cflag & CRTSCTS)) { |
1da177e4 | 1398 | tty->hw_stopped = 0; |
d8d16e47 JS |
1399 | isicom_start(tty); |
1400 | } | |
1da177e4 LT |
1401 | } |
1402 | ||
1403 | /* throttle et all */ | |
d8d16e47 | 1404 | static void isicom_throttle(struct tty_struct *tty) |
1da177e4 | 1405 | { |
8070e35c | 1406 | struct isi_port *port = tty->driver_data; |
d8d16e47 JS |
1407 | struct isi_board *card = port->card; |
1408 | ||
1da177e4 LT |
1409 | if (isicom_paranoia_check(port, tty->name, "isicom_throttle")) |
1410 | return; | |
d8d16e47 | 1411 | |
1da177e4 LT |
1412 | /* tell the card that this port cannot handle any more data for now */ |
1413 | card->port_status &= ~(1 << port->channel); | |
1414 | outw(card->port_status, card->base + 0x02); | |
1415 | } | |
1416 | ||
1417 | /* unthrottle et all */ | |
d8d16e47 | 1418 | static void isicom_unthrottle(struct tty_struct *tty) |
1da177e4 | 1419 | { |
8070e35c | 1420 | struct isi_port *port = tty->driver_data; |
d8d16e47 JS |
1421 | struct isi_board *card = port->card; |
1422 | ||
1da177e4 LT |
1423 | if (isicom_paranoia_check(port, tty->name, "isicom_unthrottle")) |
1424 | return; | |
d8d16e47 | 1425 | |
1da177e4 LT |
1426 | /* tell the card that this port is ready to accept more data */ |
1427 | card->port_status |= (1 << port->channel); | |
1428 | outw(card->port_status, card->base + 0x02); | |
1429 | } | |
1430 | ||
1431 | /* stop et all */ | |
d8d16e47 | 1432 | static void isicom_stop(struct tty_struct *tty) |
1da177e4 | 1433 | { |
8070e35c | 1434 | struct isi_port *port = tty->driver_data; |
1da177e4 LT |
1435 | |
1436 | if (isicom_paranoia_check(port, tty->name, "isicom_stop")) | |
1437 | return; | |
d8d16e47 | 1438 | |
1da177e4 LT |
1439 | /* this tells the transmitter not to consider this port for |
1440 | data output to the card. */ | |
1441 | port->status &= ~ISI_TXOK; | |
1442 | } | |
1443 | ||
1444 | /* start et all */ | |
d8d16e47 | 1445 | static void isicom_start(struct tty_struct *tty) |
1da177e4 | 1446 | { |
8070e35c | 1447 | struct isi_port *port = tty->driver_data; |
d8d16e47 | 1448 | |
1da177e4 LT |
1449 | if (isicom_paranoia_check(port, tty->name, "isicom_start")) |
1450 | return; | |
d8d16e47 | 1451 | |
1da177e4 LT |
1452 | /* this tells the transmitter to consider this port for |
1453 | data output to the card. */ | |
1454 | port->status |= ISI_TXOK; | |
1455 | } | |
1456 | ||
d8d16e47 | 1457 | static void isicom_hangup(struct tty_struct *tty) |
1da177e4 | 1458 | { |
8070e35c | 1459 | struct isi_port *port = tty->driver_data; |
cfe7c09a | 1460 | unsigned long flags; |
d8d16e47 | 1461 | |
1da177e4 LT |
1462 | if (isicom_paranoia_check(port, tty->name, "isicom_hangup")) |
1463 | return; | |
d8d16e47 | 1464 | |
cfe7c09a | 1465 | spin_lock_irqsave(&port->card->card_lock, flags); |
1da177e4 | 1466 | isicom_shutdown_port(port); |
cfe7c09a JS |
1467 | spin_unlock_irqrestore(&port->card->card_lock, flags); |
1468 | ||
1da177e4 LT |
1469 | port->count = 0; |
1470 | port->flags &= ~ASYNC_NORMAL_ACTIVE; | |
1471 | port->tty = NULL; | |
1472 | wake_up_interruptible(&port->open_wait); | |
1473 | } | |
1474 | ||
1475 | /* flush_buffer et all */ | |
d8d16e47 | 1476 | static void isicom_flush_buffer(struct tty_struct *tty) |
1da177e4 | 1477 | { |
8070e35c | 1478 | struct isi_port *port = tty->driver_data; |
d8d16e47 | 1479 | struct isi_board *card = port->card; |
1da177e4 | 1480 | unsigned long flags; |
d8d16e47 | 1481 | |
1da177e4 LT |
1482 | if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer")) |
1483 | return; | |
d8d16e47 | 1484 | |
1da177e4 LT |
1485 | spin_lock_irqsave(&card->card_lock, flags); |
1486 | port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; | |
1487 | spin_unlock_irqrestore(&card->card_lock, flags); | |
d8d16e47 | 1488 | |
1da177e4 LT |
1489 | tty_wakeup(tty); |
1490 | } | |
1491 | ||
9ac0948b JS |
1492 | /* |
1493 | * Driver init and deinit functions | |
1494 | */ | |
1da177e4 | 1495 | |
b68e31d0 | 1496 | static const struct tty_operations isicom_ops = { |
d8d16e47 JS |
1497 | .open = isicom_open, |
1498 | .close = isicom_close, | |
1499 | .write = isicom_write, | |
1500 | .put_char = isicom_put_char, | |
1501 | .flush_chars = isicom_flush_chars, | |
1502 | .write_room = isicom_write_room, | |
1da177e4 | 1503 | .chars_in_buffer = isicom_chars_in_buffer, |
d8d16e47 JS |
1504 | .ioctl = isicom_ioctl, |
1505 | .set_termios = isicom_set_termios, | |
1506 | .throttle = isicom_throttle, | |
1507 | .unthrottle = isicom_unthrottle, | |
1508 | .stop = isicom_stop, | |
1509 | .start = isicom_start, | |
1510 | .hangup = isicom_hangup, | |
1511 | .flush_buffer = isicom_flush_buffer, | |
1512 | .tiocmget = isicom_tiocmget, | |
1513 | .tiocmset = isicom_tiocmset, | |
1da177e4 LT |
1514 | }; |
1515 | ||
9ac0948b JS |
1516 | static int __devinit reset_card(struct pci_dev *pdev, |
1517 | const unsigned int card, unsigned int *signature) | |
1da177e4 | 1518 | { |
9ac0948b JS |
1519 | struct isi_board *board = pci_get_drvdata(pdev); |
1520 | unsigned long base = board->base; | |
f0a0ba6d | 1521 | unsigned int sig, portcount = 0; |
9ac0948b | 1522 | int retval = 0; |
d8d16e47 | 1523 | |
9ac0948b JS |
1524 | dev_dbg(&pdev->dev, "ISILoad:Resetting Card%d at 0x%lx\n", card + 1, |
1525 | base); | |
d8d16e47 | 1526 | |
9ac0948b | 1527 | inw(base + 0x8); |
d8d16e47 | 1528 | |
f0a0ba6d | 1529 | msleep(10); |
9ac0948b JS |
1530 | |
1531 | outw(0, base + 0x8); /* Reset */ | |
1532 | ||
f0a0ba6d | 1533 | msleep(1000); |
9ac0948b | 1534 | |
f0a0ba6d JS |
1535 | sig = inw(base + 0x4) & 0xff; |
1536 | ||
1537 | if (sig != 0xa5 && sig != 0xbb && sig != 0xcc && sig != 0xdd && | |
1538 | sig != 0xee) { | |
1539 | dev_warn(&pdev->dev, "ISILoad:Card%u reset failure (Possible " | |
1540 | "bad I/O Port Address 0x%lx).\n", card + 1, base); | |
1541 | dev_dbg(&pdev->dev, "Sig=0x%x\n", sig); | |
1542 | retval = -EIO; | |
1543 | goto end; | |
1544 | } | |
1545 | ||
1546 | msleep(10); | |
9ac0948b | 1547 | |
18234f88 | 1548 | portcount = inw(base + 0x2); |
f0a0ba6d JS |
1549 | if (!inw(base + 0xe) & 0x1 || (portcount != 0 && portcount != 4 && |
1550 | portcount != 8 && portcount != 16)) { | |
1551 | dev_err(&pdev->dev, "ISILoad:PCI Card%d reset failure.", | |
1552 | card + 1); | |
18234f88 JS |
1553 | retval = -EIO; |
1554 | goto end; | |
9ac0948b JS |
1555 | } |
1556 | ||
f0a0ba6d | 1557 | switch (sig) { |
9ac0948b JS |
1558 | case 0xa5: |
1559 | case 0xbb: | |
1560 | case 0xdd: | |
18234f88 | 1561 | board->port_count = (portcount == 4) ? 4 : 8; |
9ac0948b JS |
1562 | board->shift_count = 12; |
1563 | break; | |
1564 | case 0xcc: | |
f0a0ba6d | 1565 | case 0xee: |
9ac0948b JS |
1566 | board->port_count = 16; |
1567 | board->shift_count = 11; | |
1568 | break; | |
d8d16e47 | 1569 | } |
9ac0948b | 1570 | dev_info(&pdev->dev, "-Done\n"); |
f0a0ba6d | 1571 | *signature = sig; |
d8d16e47 | 1572 | |
9ac0948b JS |
1573 | end: |
1574 | return retval; | |
1da177e4 LT |
1575 | } |
1576 | ||
e65c1db1 JS |
1577 | static int __devinit load_firmware(struct pci_dev *pdev, |
1578 | const unsigned int index, const unsigned int signature) | |
1579 | { | |
1580 | struct isi_board *board = pci_get_drvdata(pdev); | |
1581 | const struct firmware *fw; | |
1582 | unsigned long base = board->base; | |
1583 | unsigned int a; | |
1584 | u16 word_count, status; | |
1585 | int retval = -EIO; | |
1586 | char *name; | |
1587 | u8 *data; | |
1588 | ||
1589 | struct stframe { | |
1590 | u16 addr; | |
1591 | u16 count; | |
1592 | u8 data[0]; | |
1593 | } *frame; | |
1594 | ||
1595 | switch (signature) { | |
1596 | case 0xa5: | |
1597 | name = "isi608.bin"; | |
1598 | break; | |
1599 | case 0xbb: | |
1600 | name = "isi608em.bin"; | |
1601 | break; | |
1602 | case 0xcc: | |
1603 | name = "isi616em.bin"; | |
1604 | break; | |
1605 | case 0xdd: | |
1606 | name = "isi4608.bin"; | |
1607 | break; | |
1608 | case 0xee: | |
1609 | name = "isi4616.bin"; | |
1610 | break; | |
1611 | default: | |
1612 | dev_err(&pdev->dev, "Unknown signature.\n"); | |
1613 | goto end; | |
1614 | } | |
1615 | ||
1616 | retval = request_firmware(&fw, name, &pdev->dev); | |
1617 | if (retval) | |
1618 | goto end; | |
1619 | ||
e4e04088 JS |
1620 | retval = -EIO; |
1621 | ||
e65c1db1 JS |
1622 | for (frame = (struct stframe *)fw->data; |
1623 | frame < (struct stframe *)(fw->data + fw->size); | |
e4e04088 JS |
1624 | frame = (struct stframe *)((u8 *)(frame + 1) + |
1625 | frame->count)) { | |
e65c1db1 JS |
1626 | if (WaitTillCardIsFree(base)) |
1627 | goto errrelfw; | |
1628 | ||
1629 | outw(0xf0, base); /* start upload sequence */ | |
1630 | outw(0x00, base); | |
1631 | outw(frame->addr, base); /* lsb of address */ | |
1632 | ||
1633 | word_count = frame->count / 2 + frame->count % 2; | |
1634 | outw(word_count, base); | |
1635 | InterruptTheCard(base); | |
1636 | ||
1637 | udelay(100); /* 0x2f */ | |
1638 | ||
1639 | if (WaitTillCardIsFree(base)) | |
1640 | goto errrelfw; | |
1641 | ||
1642 | if ((status = inw(base + 0x4)) != 0) { | |
1643 | dev_warn(&pdev->dev, "Card%d rejected load header:\n" | |
1644 | "Address:0x%x\nCount:0x%x\nStatus:0x%x\n", | |
1645 | index + 1, frame->addr, frame->count, status); | |
1646 | goto errrelfw; | |
1647 | } | |
1648 | outsw(base, frame->data, word_count); | |
1649 | ||
1650 | InterruptTheCard(base); | |
1651 | ||
1652 | udelay(50); /* 0x0f */ | |
1653 | ||
1654 | if (WaitTillCardIsFree(base)) | |
1655 | goto errrelfw; | |
1656 | ||
1657 | if ((status = inw(base + 0x4)) != 0) { | |
1658 | dev_err(&pdev->dev, "Card%d got out of sync.Card " | |
1659 | "Status:0x%x\n", index + 1, status); | |
1660 | goto errrelfw; | |
1661 | } | |
1662 | } | |
1663 | ||
e65c1db1 JS |
1664 | /* XXX: should we test it by reading it back and comparing with original like |
1665 | * in load firmware package? */ | |
e4e04088 JS |
1666 | for (frame = (struct stframe *)fw->data; |
1667 | frame < (struct stframe *)(fw->data + fw->size); | |
1668 | frame = (struct stframe *)((u8 *)(frame + 1) + | |
1669 | frame->count)) { | |
e65c1db1 JS |
1670 | if (WaitTillCardIsFree(base)) |
1671 | goto errrelfw; | |
1672 | ||
1673 | outw(0xf1, base); /* start download sequence */ | |
1674 | outw(0x00, base); | |
1675 | outw(frame->addr, base); /* lsb of address */ | |
1676 | ||
1677 | word_count = (frame->count >> 1) + frame->count % 2; | |
1678 | outw(word_count + 1, base); | |
1679 | InterruptTheCard(base); | |
1680 | ||
1681 | udelay(50); /* 0xf */ | |
1682 | ||
1683 | if (WaitTillCardIsFree(base)) | |
1684 | goto errrelfw; | |
1685 | ||
1686 | if ((status = inw(base + 0x4)) != 0) { | |
1687 | dev_warn(&pdev->dev, "Card%d rejected verify header:\n" | |
1688 | "Address:0x%x\nCount:0x%x\nStatus: 0x%x\n", | |
1689 | index + 1, frame->addr, frame->count, status); | |
1690 | goto errrelfw; | |
1691 | } | |
1692 | ||
1693 | data = kmalloc(word_count * 2, GFP_KERNEL); | |
f0671378 JS |
1694 | if (data == NULL) { |
1695 | dev_err(&pdev->dev, "Card%d, firmware upload " | |
1696 | "failed, not enough memory\n", index + 1); | |
1697 | goto errrelfw; | |
1698 | } | |
e65c1db1 JS |
1699 | inw(base); |
1700 | insw(base, data, word_count); | |
1701 | InterruptTheCard(base); | |
1702 | ||
1703 | for (a = 0; a < frame->count; a++) | |
1704 | if (data[a] != frame->data[a]) { | |
1705 | kfree(data); | |
1706 | dev_err(&pdev->dev, "Card%d, firmware upload " | |
1707 | "failed\n", index + 1); | |
1708 | goto errrelfw; | |
1709 | } | |
1710 | kfree(data); | |
1711 | ||
1712 | udelay(50); /* 0xf */ | |
1713 | ||
1714 | if (WaitTillCardIsFree(base)) | |
1715 | goto errrelfw; | |
1716 | ||
1717 | if ((status = inw(base + 0x4)) != 0) { | |
1718 | dev_err(&pdev->dev, "Card%d verify got out of sync. " | |
1719 | "Card Status:0x%x\n", index + 1, status); | |
1720 | goto errrelfw; | |
1721 | } | |
1722 | } | |
1723 | ||
e4e04088 JS |
1724 | /* xfer ctrl */ |
1725 | if (WaitTillCardIsFree(base)) | |
1726 | goto errrelfw; | |
1727 | ||
1728 | outw(0xf2, base); | |
1729 | outw(0x800, base); | |
1730 | outw(0x0, base); | |
1731 | outw(0x0, base); | |
1732 | InterruptTheCard(base); | |
1733 | outw(0x0, base + 0x4); /* for ISI4608 cards */ | |
1734 | ||
e65c1db1 JS |
1735 | board->status |= FIRMWARE_LOADED; |
1736 | retval = 0; | |
1737 | ||
1738 | errrelfw: | |
1739 | release_firmware(fw); | |
1740 | end: | |
1741 | return retval; | |
1742 | } | |
1743 | ||
1da177e4 LT |
1744 | /* |
1745 | * Insmod can set static symbols so keep these static | |
1746 | */ | |
1ed0c0b7 | 1747 | static unsigned int card_count; |
9ac0948b JS |
1748 | |
1749 | static int __devinit isicom_probe(struct pci_dev *pdev, | |
1750 | const struct pci_device_id *ent) | |
1751 | { | |
1752 | unsigned int ioaddr, signature, index; | |
1753 | int retval = -EPERM; | |
1754 | u8 pciirq; | |
1755 | struct isi_board *board = NULL; | |
1756 | ||
1ed0c0b7 | 1757 | if (card_count >= BOARD_COUNT) |
9ac0948b JS |
1758 | goto err; |
1759 | ||
1760 | ioaddr = pci_resource_start(pdev, 3); | |
1761 | /* i.e at offset 0x1c in the PCI configuration register space. */ | |
1762 | pciirq = pdev->irq; | |
1763 | dev_info(&pdev->dev, "ISI PCI Card(Device ID 0x%x)\n", ent->device); | |
1764 | ||
1765 | /* allot the first empty slot in the array */ | |
1766 | for (index = 0; index < BOARD_COUNT; index++) | |
1767 | if (isi_card[index].base == 0) { | |
1768 | board = &isi_card[index]; | |
1769 | break; | |
1770 | } | |
1771 | ||
938a7023 | 1772 | board->index = index; |
9ac0948b JS |
1773 | board->base = ioaddr; |
1774 | board->irq = pciirq; | |
1ed0c0b7 | 1775 | card_count++; |
9ac0948b JS |
1776 | |
1777 | pci_set_drvdata(pdev, board); | |
1778 | ||
78028da9 JS |
1779 | retval = pci_request_region(pdev, 3, ISICOM_NAME); |
1780 | if (retval) { | |
09a4a112 JS |
1781 | dev_err(&pdev->dev, "I/O Region 0x%lx-0x%lx is busy. Card%d " |
1782 | "will be disabled.\n", board->base, board->base + 15, | |
1783 | index + 1); | |
1784 | retval = -EBUSY; | |
1ed0c0b7 | 1785 | goto errdec; |
09a4a112 | 1786 | } |
9ac0948b | 1787 | |
09a4a112 JS |
1788 | retval = request_irq(board->irq, isicom_interrupt, |
1789 | IRQF_SHARED | IRQF_DISABLED, ISICOM_NAME, board); | |
1790 | if (retval < 0) { | |
1791 | dev_err(&pdev->dev, "Could not install handler at Irq %d. " | |
1792 | "Card%d will be disabled.\n", board->irq, index + 1); | |
9ac0948b | 1793 | goto errunrr; |
09a4a112 | 1794 | } |
9ac0948b JS |
1795 | |
1796 | retval = reset_card(pdev, index, &signature); | |
1797 | if (retval < 0) | |
1798 | goto errunri; | |
1799 | ||
e65c1db1 JS |
1800 | retval = load_firmware(pdev, index, signature); |
1801 | if (retval < 0) | |
1802 | goto errunri; | |
1803 | ||
938a7023 JS |
1804 | for (index = 0; index < board->port_count; index++) |
1805 | tty_register_device(isicom_normal, board->index * 16 + index, | |
1806 | &pdev->dev); | |
1807 | ||
9ac0948b JS |
1808 | return 0; |
1809 | ||
1810 | errunri: | |
1811 | free_irq(board->irq, board); | |
1812 | errunrr: | |
78028da9 | 1813 | pci_release_region(pdev, 3); |
1ed0c0b7 | 1814 | errdec: |
9ac0948b | 1815 | board->base = 0; |
1ed0c0b7 JS |
1816 | card_count--; |
1817 | err: | |
9ac0948b JS |
1818 | return retval; |
1819 | } | |
1820 | ||
1821 | static void __devexit isicom_remove(struct pci_dev *pdev) | |
1822 | { | |
1823 | struct isi_board *board = pci_get_drvdata(pdev); | |
938a7023 JS |
1824 | unsigned int i; |
1825 | ||
1826 | for (i = 0; i < board->port_count; i++) | |
1827 | tty_unregister_device(isicom_normal, board->index * 16 + i); | |
9ac0948b JS |
1828 | |
1829 | free_irq(board->irq, board); | |
78028da9 | 1830 | pci_release_region(pdev, 3); |
1ed0c0b7 JS |
1831 | board->base = 0; |
1832 | card_count--; | |
9ac0948b | 1833 | } |
1da177e4 | 1834 | |
ca262005 | 1835 | static int __init isicom_init(void) |
1da177e4 | 1836 | { |
9ac0948b JS |
1837 | int retval, idx, channel; |
1838 | struct isi_port *port; | |
d8d16e47 | 1839 | |
9ac0948b JS |
1840 | for(idx = 0; idx < BOARD_COUNT; idx++) { |
1841 | port = &isi_ports[idx * 16]; | |
1842 | isi_card[idx].ports = port; | |
1843 | spin_lock_init(&isi_card[idx].card_lock); | |
1844 | for (channel = 0; channel < 16; channel++, port++) { | |
1845 | port->magic = ISICOM_MAGIC; | |
1846 | port->card = &isi_card[idx]; | |
1847 | port->channel = channel; | |
1848 | port->close_delay = 50 * HZ/100; | |
1849 | port->closing_wait = 3000 * HZ/100; | |
9ac0948b JS |
1850 | port->status = 0; |
1851 | init_waitqueue_head(&port->open_wait); | |
1852 | init_waitqueue_head(&port->close_wait); | |
1853 | /* . . . */ | |
1854 | } | |
1855 | isi_card[idx].base = 0; | |
1856 | isi_card[idx].irq = 0; | |
1da177e4 | 1857 | } |
d8d16e47 | 1858 | |
09a4a112 JS |
1859 | /* tty driver structure initialization */ |
1860 | isicom_normal = alloc_tty_driver(PORT_COUNT); | |
1861 | if (!isicom_normal) { | |
1862 | retval = -ENOMEM; | |
9ac0948b | 1863 | goto error; |
09a4a112 JS |
1864 | } |
1865 | ||
1866 | isicom_normal->owner = THIS_MODULE; | |
1867 | isicom_normal->name = "ttyM"; | |
1868 | isicom_normal->major = ISICOM_NMAJOR; | |
1869 | isicom_normal->minor_start = 0; | |
1870 | isicom_normal->type = TTY_DRIVER_TYPE_SERIAL; | |
1871 | isicom_normal->subtype = SERIAL_TYPE_NORMAL; | |
1872 | isicom_normal->init_termios = tty_std_termios; | |
1873 | isicom_normal->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | | |
1874 | CLOCAL; | |
938a7023 JS |
1875 | isicom_normal->flags = TTY_DRIVER_REAL_RAW | |
1876 | TTY_DRIVER_DYNAMIC_DEV; | |
09a4a112 JS |
1877 | tty_set_operations(isicom_normal, &isicom_ops); |
1878 | ||
1879 | retval = tty_register_driver(isicom_normal); | |
1880 | if (retval) { | |
1881 | pr_dbg("Couldn't register the dialin driver\n"); | |
1882 | goto err_puttty; | |
1883 | } | |
1da177e4 | 1884 | |
9ac0948b | 1885 | retval = pci_register_driver(&isicom_driver); |
1da177e4 | 1886 | if (retval < 0) { |
9ac0948b | 1887 | printk(KERN_ERR "ISICOM: Unable to register pci driver.\n"); |
09a4a112 | 1888 | goto err_unrtty; |
1da177e4 | 1889 | } |
d8d16e47 | 1890 | |
34b55b86 | 1891 | mod_timer(&tx, jiffies + 1); |
d8d16e47 | 1892 | |
1da177e4 | 1893 | return 0; |
09a4a112 JS |
1894 | err_unrtty: |
1895 | tty_unregister_driver(isicom_normal); | |
1896 | err_puttty: | |
1897 | put_tty_driver(isicom_normal); | |
9ac0948b JS |
1898 | error: |
1899 | return retval; | |
1da177e4 LT |
1900 | } |
1901 | ||
1902 | static void __exit isicom_exit(void) | |
1903 | { | |
1904 | re_schedule = 0; | |
aaa246ea | 1905 | |
906cdecb | 1906 | wait_for_completion_timeout(&isi_timerdone, HZ); |
aaa246ea | 1907 | |
9ac0948b | 1908 | pci_unregister_driver(&isicom_driver); |
09a4a112 JS |
1909 | tty_unregister_driver(isicom_normal); |
1910 | put_tty_driver(isicom_normal); | |
1da177e4 LT |
1911 | } |
1912 | ||
ca262005 | 1913 | module_init(isicom_init); |
1da177e4 | 1914 | module_exit(isicom_exit); |
aaa246ea JS |
1915 | |
1916 | MODULE_AUTHOR("MultiTech"); | |
1917 | MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech"); | |
1918 | MODULE_LICENSE("GPL"); |