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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 | ||
140 | #ifdef DEBUG | |
141 | #define pr_dbg(str...) printk(KERN_DEBUG "ISICOM: " str) | |
142 | #define isicom_paranoia_check(a, b, c) __isicom_paranoia_check((a), (b), (c)) | |
143 | #else | |
144 | #define pr_dbg(str...) do { } while (0) | |
145 | #define isicom_paranoia_check(a, b, c) 0 | |
146 | #endif | |
147 | ||
9ac0948b JS |
148 | static int isicom_probe(struct pci_dev *, const struct pci_device_id *); |
149 | static void __devexit isicom_remove(struct pci_dev *); | |
150 | ||
1da177e4 | 151 | static struct pci_device_id isicom_pci_tbl[] = { |
9ac0948b JS |
152 | { PCI_DEVICE(VENDOR_ID, 0x2028) }, |
153 | { PCI_DEVICE(VENDOR_ID, 0x2051) }, | |
154 | { PCI_DEVICE(VENDOR_ID, 0x2052) }, | |
155 | { PCI_DEVICE(VENDOR_ID, 0x2053) }, | |
156 | { PCI_DEVICE(VENDOR_ID, 0x2054) }, | |
157 | { PCI_DEVICE(VENDOR_ID, 0x2055) }, | |
158 | { PCI_DEVICE(VENDOR_ID, 0x2056) }, | |
159 | { PCI_DEVICE(VENDOR_ID, 0x2057) }, | |
160 | { PCI_DEVICE(VENDOR_ID, 0x2058) }, | |
1da177e4 LT |
161 | { 0 } |
162 | }; | |
163 | MODULE_DEVICE_TABLE(pci, isicom_pci_tbl); | |
164 | ||
9ac0948b JS |
165 | static struct pci_driver isicom_driver = { |
166 | .name = "isicom", | |
167 | .id_table = isicom_pci_tbl, | |
168 | .probe = isicom_probe, | |
169 | .remove = __devexit_p(isicom_remove) | |
170 | }; | |
171 | ||
1da177e4 LT |
172 | static int prev_card = 3; /* start servicing isi_card[0] */ |
173 | static struct tty_driver *isicom_normal; | |
174 | ||
906cdecb | 175 | static DECLARE_COMPLETION(isi_timerdone); |
1da177e4 | 176 | static char re_schedule = 1; |
1da177e4 | 177 | |
1da177e4 | 178 | static void isicom_tx(unsigned long _data); |
d8d16e47 | 179 | static void isicom_start(struct tty_struct *tty); |
1da177e4 | 180 | |
34b55b86 JS |
181 | static DEFINE_TIMER(tx, isicom_tx, 0, 0); |
182 | ||
1da177e4 LT |
183 | /* baud index mappings from linux defns to isi */ |
184 | ||
185 | static signed char linuxb_to_isib[] = { | |
d8d16e47 | 186 | -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 16, 17, 18, 19 |
1da177e4 LT |
187 | }; |
188 | ||
189 | struct isi_board { | |
8070e35c | 190 | unsigned long base; |
1da177e4 LT |
191 | unsigned char irq; |
192 | unsigned char port_count; | |
193 | unsigned short status; | |
a547dfe9 | 194 | unsigned short port_status; /* each bit for each port */ |
1da177e4 LT |
195 | unsigned short shift_count; |
196 | struct isi_port * ports; | |
197 | signed char count; | |
1da177e4 LT |
198 | spinlock_t card_lock; /* Card wide lock 11/5/00 -sameer */ |
199 | unsigned long flags; | |
938a7023 | 200 | unsigned int index; |
1da177e4 LT |
201 | }; |
202 | ||
203 | struct isi_port { | |
204 | unsigned short magic; | |
205 | unsigned int flags; | |
206 | int count; | |
207 | int blocked_open; | |
208 | int close_delay; | |
8070e35c JS |
209 | u16 channel; |
210 | u16 status; | |
211 | u16 closing_wait; | |
1da177e4 LT |
212 | struct isi_board * card; |
213 | struct tty_struct * tty; | |
214 | wait_queue_head_t close_wait; | |
215 | wait_queue_head_t open_wait; | |
216 | struct work_struct hangup_tq; | |
217 | struct work_struct bh_tqueue; | |
218 | unsigned char * xmit_buf; | |
219 | int xmit_head; | |
220 | int xmit_tail; | |
221 | int xmit_cnt; | |
222 | }; | |
223 | ||
224 | static struct isi_board isi_card[BOARD_COUNT]; | |
225 | static struct isi_port isi_ports[PORT_COUNT]; | |
226 | ||
227 | /* | |
228 | * Locking functions for card level locking. We need to own both | |
229 | * the kernel lock for the card and have the card in a position that | |
230 | * it wants to talk. | |
231 | */ | |
d8d16e47 | 232 | |
cfe7c09a JS |
233 | static inline int WaitTillCardIsFree(u16 base) |
234 | { | |
235 | unsigned int count = 0; | |
236 | unsigned int a = in_atomic(); /* do we run under spinlock? */ | |
237 | ||
238 | while (!(inw(base + 0xe) & 0x1) && count++ < 100) | |
239 | if (a) | |
240 | mdelay(1); | |
241 | else | |
242 | msleep(1); | |
243 | ||
244 | return !(inw(base + 0xe) & 0x1); | |
245 | } | |
246 | ||
1da177e4 LT |
247 | static int lock_card(struct isi_board *card) |
248 | { | |
249 | char retries; | |
8070e35c | 250 | unsigned long base = card->base; |
1da177e4 LT |
251 | |
252 | for (retries = 0; retries < 100; retries++) { | |
253 | spin_lock_irqsave(&card->card_lock, card->flags); | |
254 | if (inw(base + 0xe) & 0x1) { | |
d8d16e47 | 255 | return 1; |
1da177e4 LT |
256 | } else { |
257 | spin_unlock_irqrestore(&card->card_lock, card->flags); | |
258 | udelay(1000); /* 1ms */ | |
259 | } | |
260 | } | |
a547dfe9 JS |
261 | printk(KERN_WARNING "ISICOM: Failed to lock Card (0x%lx)\n", |
262 | card->base); | |
263 | ||
0418726b | 264 | return 0; /* Failed to acquire the card! */ |
1da177e4 LT |
265 | } |
266 | ||
267 | static int lock_card_at_interrupt(struct isi_board *card) | |
268 | { | |
269 | unsigned char retries; | |
8070e35c | 270 | unsigned long base = card->base; |
1da177e4 LT |
271 | |
272 | for (retries = 0; retries < 200; retries++) { | |
273 | spin_lock_irqsave(&card->card_lock, card->flags); | |
274 | ||
275 | if (inw(base + 0xe) & 0x1) | |
d8d16e47 | 276 | return 1; |
1da177e4 LT |
277 | else |
278 | spin_unlock_irqrestore(&card->card_lock, card->flags); | |
279 | } | |
280 | /* Failing in interrupt is an acceptable event */ | |
0418726b | 281 | return 0; /* Failed to acquire the card! */ |
1da177e4 LT |
282 | } |
283 | ||
284 | static void unlock_card(struct isi_board *card) | |
285 | { | |
286 | spin_unlock_irqrestore(&card->card_lock, card->flags); | |
287 | } | |
288 | ||
289 | /* | |
290 | * ISI Card specific ops ... | |
291 | */ | |
d8d16e47 | 292 | |
cfe7c09a | 293 | /* card->lock HAS to be held */ |
d8d16e47 | 294 | static void raise_dtr(struct isi_port *port) |
1da177e4 | 295 | { |
d8d16e47 | 296 | struct isi_board *card = port->card; |
8070e35c JS |
297 | unsigned long base = card->base; |
298 | u16 channel = port->channel; | |
1da177e4 | 299 | |
cfe7c09a | 300 | if (WaitTillCardIsFree(base)) |
1da177e4 LT |
301 | return; |
302 | ||
d8d16e47 | 303 | outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
1da177e4 LT |
304 | outw(0x0504, base); |
305 | InterruptTheCard(base); | |
306 | port->status |= ISI_DTR; | |
1da177e4 LT |
307 | } |
308 | ||
cfe7c09a | 309 | /* card->lock HAS to be held */ |
d8d16e47 JS |
310 | static inline void drop_dtr(struct isi_port *port) |
311 | { | |
312 | struct isi_board *card = port->card; | |
8070e35c JS |
313 | unsigned long base = card->base; |
314 | u16 channel = port->channel; | |
1da177e4 | 315 | |
cfe7c09a | 316 | if (WaitTillCardIsFree(base)) |
1da177e4 LT |
317 | return; |
318 | ||
d8d16e47 | 319 | outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
1da177e4 | 320 | outw(0x0404, base); |
d8d16e47 | 321 | InterruptTheCard(base); |
1da177e4 | 322 | port->status &= ~ISI_DTR; |
1da177e4 LT |
323 | } |
324 | ||
cfe7c09a | 325 | /* card->lock HAS to be held */ |
d8d16e47 | 326 | static inline void raise_rts(struct isi_port *port) |
1da177e4 | 327 | { |
d8d16e47 | 328 | struct isi_board *card = port->card; |
8070e35c JS |
329 | unsigned long base = card->base; |
330 | u16 channel = port->channel; | |
1da177e4 | 331 | |
cfe7c09a | 332 | if (WaitTillCardIsFree(base)) |
1da177e4 LT |
333 | return; |
334 | ||
d8d16e47 | 335 | outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
1da177e4 | 336 | outw(0x0a04, base); |
d8d16e47 | 337 | InterruptTheCard(base); |
1da177e4 | 338 | port->status |= ISI_RTS; |
1da177e4 | 339 | } |
cfe7c09a JS |
340 | |
341 | /* card->lock HAS to be held */ | |
d8d16e47 | 342 | static inline void drop_rts(struct isi_port *port) |
1da177e4 | 343 | { |
d8d16e47 | 344 | struct isi_board *card = port->card; |
8070e35c JS |
345 | unsigned long base = card->base; |
346 | u16 channel = port->channel; | |
1da177e4 | 347 | |
cfe7c09a | 348 | if (WaitTillCardIsFree(base)) |
1da177e4 LT |
349 | return; |
350 | ||
d8d16e47 | 351 | outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
1da177e4 | 352 | outw(0x0804, base); |
d8d16e47 | 353 | InterruptTheCard(base); |
1da177e4 | 354 | port->status &= ~ISI_RTS; |
1da177e4 LT |
355 | } |
356 | ||
cfe7c09a | 357 | /* card->lock MUST NOT be held */ |
d8d16e47 | 358 | static inline void raise_dtr_rts(struct isi_port *port) |
1da177e4 | 359 | { |
d8d16e47 | 360 | struct isi_board *card = port->card; |
8070e35c JS |
361 | unsigned long base = card->base; |
362 | u16 channel = port->channel; | |
1da177e4 LT |
363 | |
364 | if (!lock_card(card)) | |
365 | return; | |
366 | ||
d8d16e47 | 367 | outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
1da177e4 LT |
368 | outw(0x0f04, base); |
369 | InterruptTheCard(base); | |
370 | port->status |= (ISI_DTR | ISI_RTS); | |
371 | unlock_card(card); | |
372 | } | |
373 | ||
cfe7c09a | 374 | /* card->lock HAS to be held */ |
d8d16e47 | 375 | static void drop_dtr_rts(struct isi_port *port) |
1da177e4 | 376 | { |
d8d16e47 | 377 | struct isi_board *card = port->card; |
8070e35c JS |
378 | unsigned long base = card->base; |
379 | u16 channel = port->channel; | |
1da177e4 | 380 | |
cfe7c09a | 381 | if (WaitTillCardIsFree(base)) |
1da177e4 LT |
382 | return; |
383 | ||
d8d16e47 | 384 | outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
1da177e4 | 385 | outw(0x0c04, base); |
d8d16e47 | 386 | InterruptTheCard(base); |
1da177e4 | 387 | port->status &= ~(ISI_RTS | ISI_DTR); |
1da177e4 LT |
388 | } |
389 | ||
1da177e4 LT |
390 | /* |
391 | * ISICOM Driver specific routines ... | |
392 | * | |
393 | */ | |
d8d16e47 | 394 | |
aaa246ea JS |
395 | static inline int __isicom_paranoia_check(struct isi_port const *port, |
396 | char *name, const char *routine) | |
1da177e4 | 397 | { |
1da177e4 | 398 | if (!port) { |
aaa246ea JS |
399 | printk(KERN_WARNING "ISICOM: Warning: bad isicom magic for " |
400 | "dev %s in %s.\n", name, routine); | |
1da177e4 LT |
401 | return 1; |
402 | } | |
403 | if (port->magic != ISICOM_MAGIC) { | |
aaa246ea JS |
404 | printk(KERN_WARNING "ISICOM: Warning: NULL isicom port for " |
405 | "dev %s in %s.\n", name, routine); | |
1da177e4 | 406 | return 1; |
d8d16e47 | 407 | } |
aaa246ea | 408 | |
1da177e4 LT |
409 | return 0; |
410 | } | |
d8d16e47 | 411 | |
1da177e4 | 412 | /* |
d8d16e47 | 413 | * Transmitter. |
1da177e4 LT |
414 | * |
415 | * We shovel data into the card buffers on a regular basis. The card | |
416 | * will do the rest of the work for us. | |
417 | */ | |
418 | ||
419 | static void isicom_tx(unsigned long _data) | |
420 | { | |
421 | short count = (BOARD_COUNT-1), card, base; | |
422 | short txcount, wrd, residue, word_count, cnt; | |
d8d16e47 JS |
423 | struct isi_port *port; |
424 | struct tty_struct *tty; | |
425 | ||
1da177e4 LT |
426 | /* find next active board */ |
427 | card = (prev_card + 1) & 0x0003; | |
428 | while(count-- > 0) { | |
d8d16e47 | 429 | if (isi_card[card].status & BOARD_ACTIVE) |
1da177e4 | 430 | break; |
d8d16e47 | 431 | card = (card + 1) & 0x0003; |
1da177e4 LT |
432 | } |
433 | if (!(isi_card[card].status & BOARD_ACTIVE)) | |
434 | goto sched_again; | |
d8d16e47 | 435 | |
1da177e4 | 436 | prev_card = card; |
d8d16e47 | 437 | |
1da177e4 LT |
438 | count = isi_card[card].port_count; |
439 | port = isi_card[card].ports; | |
440 | base = isi_card[card].base; | |
441 | for (;count > 0;count--, port++) { | |
442 | if (!lock_card_at_interrupt(&isi_card[card])) | |
443 | continue; | |
444 | /* port not active or tx disabled to force flow control */ | |
445 | if (!(port->flags & ASYNC_INITIALIZED) || | |
d8d16e47 | 446 | !(port->status & ISI_TXOK)) |
1da177e4 LT |
447 | unlock_card(&isi_card[card]); |
448 | continue; | |
d8d16e47 | 449 | |
1da177e4 | 450 | tty = port->tty; |
d8d16e47 JS |
451 | |
452 | ||
453 | if (tty == NULL) { | |
1da177e4 LT |
454 | unlock_card(&isi_card[card]); |
455 | continue; | |
456 | } | |
d8d16e47 | 457 | |
1da177e4 LT |
458 | txcount = min_t(short, TX_SIZE, port->xmit_cnt); |
459 | if (txcount <= 0 || tty->stopped || tty->hw_stopped) { | |
460 | unlock_card(&isi_card[card]); | |
461 | continue; | |
462 | } | |
463 | if (!(inw(base + 0x02) & (1 << port->channel))) { | |
464 | unlock_card(&isi_card[card]); | |
d8d16e47 | 465 | continue; |
1da177e4 | 466 | } |
aaa246ea JS |
467 | pr_dbg("txing %d bytes, port%d.\n", txcount, |
468 | port->channel + 1); | |
469 | outw((port->channel << isi_card[card].shift_count) | txcount, | |
470 | base); | |
1da177e4 | 471 | residue = NO; |
d8d16e47 | 472 | wrd = 0; |
1da177e4 | 473 | while (1) { |
a547dfe9 JS |
474 | cnt = min_t(int, txcount, (SERIAL_XMIT_SIZE |
475 | - port->xmit_tail)); | |
1da177e4 LT |
476 | if (residue == YES) { |
477 | residue = NO; | |
478 | if (cnt > 0) { | |
a547dfe9 JS |
479 | wrd |= (port->xmit_buf[port->xmit_tail] |
480 | << 8); | |
481 | port->xmit_tail = (port->xmit_tail + 1) | |
482 | & (SERIAL_XMIT_SIZE - 1); | |
1da177e4 LT |
483 | port->xmit_cnt--; |
484 | txcount--; | |
485 | cnt--; | |
d8d16e47 | 486 | outw(wrd, base); |
a547dfe9 | 487 | } else { |
1da177e4 LT |
488 | outw(wrd, base); |
489 | break; | |
490 | } | |
d8d16e47 | 491 | } |
1da177e4 LT |
492 | if (cnt <= 0) break; |
493 | word_count = cnt >> 1; | |
a547dfe9 JS |
494 | outsw(base, port->xmit_buf+port->xmit_tail,word_count); |
495 | port->xmit_tail = (port->xmit_tail | |
496 | + (word_count << 1)) & (SERIAL_XMIT_SIZE - 1); | |
1da177e4 LT |
497 | txcount -= (word_count << 1); |
498 | port->xmit_cnt -= (word_count << 1); | |
499 | if (cnt & 0x0001) { | |
500 | residue = YES; | |
501 | wrd = port->xmit_buf[port->xmit_tail]; | |
a547dfe9 JS |
502 | port->xmit_tail = (port->xmit_tail + 1) |
503 | & (SERIAL_XMIT_SIZE - 1); | |
1da177e4 LT |
504 | port->xmit_cnt--; |
505 | txcount--; | |
506 | } | |
507 | } | |
508 | ||
509 | InterruptTheCard(base); | |
510 | if (port->xmit_cnt <= 0) | |
511 | port->status &= ~ISI_TXOK; | |
512 | if (port->xmit_cnt <= WAKEUP_CHARS) | |
513 | schedule_work(&port->bh_tqueue); | |
514 | unlock_card(&isi_card[card]); | |
d8d16e47 | 515 | } |
1da177e4 | 516 | |
d8d16e47 JS |
517 | /* schedule another tx for hopefully in about 10ms */ |
518 | sched_again: | |
aaa246ea | 519 | if (!re_schedule) { |
906cdecb | 520 | complete(&isi_timerdone); |
aaa246ea JS |
521 | return; |
522 | } | |
523 | ||
34b55b86 | 524 | mod_timer(&tx, jiffies + msecs_to_jiffies(10)); |
d8d16e47 JS |
525 | } |
526 | ||
1da177e4 LT |
527 | /* Interrupt handlers */ |
528 | ||
d8d16e47 | 529 | |
c4028958 | 530 | static void isicom_bottomhalf(struct work_struct *work) |
1da177e4 | 531 | { |
c4028958 | 532 | struct isi_port *port = container_of(work, struct isi_port, bh_tqueue); |
d8d16e47 JS |
533 | struct tty_struct *tty = port->tty; |
534 | ||
1da177e4 LT |
535 | if (!tty) |
536 | return; | |
537 | ||
d8d16e47 | 538 | tty_wakeup(tty); |
1da177e4 | 539 | wake_up_interruptible(&tty->write_wait); |
d8d16e47 JS |
540 | } |
541 | ||
1da177e4 | 542 | /* |
d8d16e47 | 543 | * Main interrupt handler routine |
1da177e4 | 544 | */ |
d8d16e47 | 545 | |
7d12e780 | 546 | static irqreturn_t isicom_interrupt(int irq, void *dev_id) |
1da177e4 | 547 | { |
8070e35c | 548 | struct isi_board *card = dev_id; |
d8d16e47 JS |
549 | struct isi_port *port; |
550 | struct tty_struct *tty; | |
8070e35c JS |
551 | unsigned long base; |
552 | u16 header, word_count, count, channel; | |
1da177e4 | 553 | short byte_count; |
33f0f88f | 554 | unsigned char *rp; |
d8d16e47 | 555 | |
1da177e4 LT |
556 | if (!card || !(card->status & FIRMWARE_LOADED)) |
557 | return IRQ_NONE; | |
d8d16e47 | 558 | |
1da177e4 LT |
559 | base = card->base; |
560 | spin_lock(&card->card_lock); | |
d8d16e47 | 561 | |
18234f88 JS |
562 | /* |
563 | * disable any interrupts from the PCI card and lower the | |
564 | * interrupt line | |
565 | */ | |
566 | outw(0x8000, base+0x04); | |
567 | ClearInterrupt(base); | |
d8d16e47 | 568 | |
1da177e4 LT |
569 | inw(base); /* get the dummy word out */ |
570 | header = inw(base); | |
571 | channel = (header & 0x7800) >> card->shift_count; | |
572 | byte_count = header & 0xff; | |
573 | ||
574 | if (channel + 1 > card->port_count) { | |
a547dfe9 JS |
575 | printk(KERN_WARNING "ISICOM: isicom_interrupt(0x%lx): " |
576 | "%d(channel) > port_count.\n", base, channel+1); | |
18234f88 | 577 | outw(0x0000, base+0x04); /* enable interrupts */ |
1da177e4 | 578 | spin_unlock(&card->card_lock); |
d8d16e47 | 579 | return IRQ_HANDLED; |
1da177e4 LT |
580 | } |
581 | port = card->ports + channel; | |
582 | if (!(port->flags & ASYNC_INITIALIZED)) { | |
18234f88 | 583 | outw(0x0000, base+0x04); /* enable interrupts */ |
1da177e4 | 584 | return IRQ_HANDLED; |
d8d16e47 JS |
585 | } |
586 | ||
1da177e4 LT |
587 | tty = port->tty; |
588 | if (tty == NULL) { | |
589 | word_count = byte_count >> 1; | |
590 | while(byte_count > 1) { | |
591 | inw(base); | |
592 | byte_count -= 2; | |
593 | } | |
594 | if (byte_count & 0x01) | |
595 | inw(base); | |
18234f88 | 596 | outw(0x0000, base+0x04); /* enable interrupts */ |
1da177e4 LT |
597 | spin_unlock(&card->card_lock); |
598 | return IRQ_HANDLED; | |
599 | } | |
d8d16e47 | 600 | |
1da177e4 LT |
601 | if (header & 0x8000) { /* Status Packet */ |
602 | header = inw(base); | |
603 | switch(header & 0xff) { | |
d8d16e47 | 604 | case 0: /* Change in EIA signals */ |
d8d16e47 JS |
605 | if (port->flags & ASYNC_CHECK_CD) { |
606 | if (port->status & ISI_DCD) { | |
607 | if (!(header & ISI_DCD)) { | |
608 | /* Carrier has been lost */ | |
a547dfe9 JS |
609 | pr_dbg("interrupt: DCD->low.\n" |
610 | ); | |
d8d16e47 JS |
611 | port->status &= ~ISI_DCD; |
612 | schedule_work(&port->hangup_tq); | |
1da177e4 | 613 | } |
a547dfe9 JS |
614 | } else if (header & ISI_DCD) { |
615 | /* Carrier has been detected */ | |
616 | pr_dbg("interrupt: DCD->high.\n"); | |
617 | port->status |= ISI_DCD; | |
618 | wake_up_interruptible(&port->open_wait); | |
1da177e4 | 619 | } |
a547dfe9 | 620 | } else { |
d8d16e47 JS |
621 | if (header & ISI_DCD) |
622 | port->status |= ISI_DCD; | |
623 | else | |
624 | port->status &= ~ISI_DCD; | |
625 | } | |
626 | ||
627 | if (port->flags & ASYNC_CTS_FLOW) { | |
628 | if (port->tty->hw_stopped) { | |
629 | if (header & ISI_CTS) { | |
630 | port->tty->hw_stopped = 0; | |
631 | /* start tx ing */ | |
a547dfe9 JS |
632 | port->status |= (ISI_TXOK |
633 | | ISI_CTS); | |
d8d16e47 | 634 | schedule_work(&port->bh_tqueue); |
1da177e4 | 635 | } |
a547dfe9 JS |
636 | } else if (!(header & ISI_CTS)) { |
637 | port->tty->hw_stopped = 1; | |
638 | /* stop tx ing */ | |
639 | port->status &= ~(ISI_TXOK | ISI_CTS); | |
1da177e4 | 640 | } |
a547dfe9 | 641 | } else { |
d8d16e47 JS |
642 | if (header & ISI_CTS) |
643 | port->status |= ISI_CTS; | |
1da177e4 | 644 | else |
d8d16e47 JS |
645 | port->status &= ~ISI_CTS; |
646 | } | |
647 | ||
648 | if (header & ISI_DSR) | |
649 | port->status |= ISI_DSR; | |
650 | else | |
651 | port->status &= ~ISI_DSR; | |
652 | ||
653 | if (header & ISI_RI) | |
654 | port->status |= ISI_RI; | |
655 | else | |
656 | port->status &= ~ISI_RI; | |
657 | ||
658 | break; | |
659 | ||
a547dfe9 | 660 | case 1: /* Received Break !!! */ |
d8d16e47 JS |
661 | tty_insert_flip_char(tty, 0, TTY_BREAK); |
662 | if (port->flags & ASYNC_SAK) | |
663 | do_SAK(tty); | |
664 | tty_flip_buffer_push(tty); | |
665 | break; | |
666 | ||
667 | case 2: /* Statistics */ | |
aaa246ea | 668 | pr_dbg("isicom_interrupt: stats!!!.\n"); |
d8d16e47 JS |
669 | break; |
670 | ||
671 | default: | |
aaa246ea | 672 | pr_dbg("Intr: Unknown code in status packet.\n"); |
d8d16e47 JS |
673 | break; |
674 | } | |
a547dfe9 | 675 | } else { /* Data Packet */ |
33f0f88f AC |
676 | |
677 | count = tty_prepare_flip_string(tty, &rp, byte_count & ~1); | |
aaa246ea | 678 | pr_dbg("Intr: Can rx %d of %d bytes.\n", count, byte_count); |
1da177e4 | 679 | word_count = count >> 1; |
33f0f88f | 680 | insw(base, rp, word_count); |
1da177e4 LT |
681 | byte_count -= (word_count << 1); |
682 | if (count & 0x0001) { | |
a547dfe9 JS |
683 | tty_insert_flip_char(tty, inw(base) & 0xff, |
684 | TTY_NORMAL); | |
1da177e4 | 685 | byte_count -= 2; |
d8d16e47 | 686 | } |
1da177e4 | 687 | if (byte_count > 0) { |
aaa246ea JS |
688 | pr_dbg("Intr(0x%lx:%d): Flip buffer overflow! dropping " |
689 | "bytes...\n", base, channel + 1); | |
1da177e4 LT |
690 | while(byte_count > 0) { /* drain out unread xtra data */ |
691 | inw(base); | |
692 | byte_count -= 2; | |
693 | } | |
694 | } | |
33f0f88f | 695 | tty_flip_buffer_push(tty); |
1da177e4 | 696 | } |
18234f88 | 697 | outw(0x0000, base+0x04); /* enable interrupts */ |
a547dfe9 | 698 | |
1da177e4 | 699 | return IRQ_HANDLED; |
d8d16e47 | 700 | } |
1da177e4 | 701 | |
d8d16e47 | 702 | static void isicom_config_port(struct isi_port *port) |
1da177e4 | 703 | { |
d8d16e47 JS |
704 | struct isi_board *card = port->card; |
705 | struct tty_struct *tty; | |
1da177e4 | 706 | unsigned long baud; |
8070e35c JS |
707 | unsigned long base = card->base; |
708 | u16 channel_setup, channel = port->channel, | |
709 | shift_count = card->shift_count; | |
1da177e4 | 710 | unsigned char flow_ctrl; |
d8d16e47 | 711 | |
1da177e4 LT |
712 | if (!(tty = port->tty) || !tty->termios) |
713 | return; | |
714 | baud = C_BAUD(tty); | |
715 | if (baud & CBAUDEX) { | |
716 | baud &= ~CBAUDEX; | |
d8d16e47 | 717 | |
1da177e4 LT |
718 | /* if CBAUDEX bit is on and the baud is set to either 50 or 75 |
719 | * then the card is programmed for 57.6Kbps or 115Kbps | |
720 | * respectively. | |
d8d16e47 JS |
721 | */ |
722 | ||
1da177e4 LT |
723 | if (baud < 1 || baud > 2) |
724 | port->tty->termios->c_cflag &= ~CBAUDEX; | |
725 | else | |
726 | baud += 15; | |
d8d16e47 | 727 | } |
1da177e4 | 728 | if (baud == 15) { |
d8d16e47 JS |
729 | |
730 | /* the ASYNC_SPD_HI and ASYNC_SPD_VHI options are set | |
1da177e4 LT |
731 | * by the set_serial_info ioctl ... this is done by |
732 | * the 'setserial' utility. | |
d8d16e47 JS |
733 | */ |
734 | ||
1da177e4 | 735 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) |
d8d16e47 | 736 | baud++; /* 57.6 Kbps */ |
1da177e4 | 737 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) |
d8d16e47 | 738 | baud +=2; /* 115 Kbps */ |
1da177e4 LT |
739 | } |
740 | if (linuxb_to_isib[baud] == -1) { | |
741 | /* hang up */ | |
d8d16e47 JS |
742 | drop_dtr(port); |
743 | return; | |
744 | } | |
745 | else | |
1da177e4 | 746 | raise_dtr(port); |
d8d16e47 | 747 | |
cfe7c09a | 748 | if (WaitTillCardIsFree(base) == 0) { |
1da177e4 LT |
749 | outw(0x8000 | (channel << shift_count) |0x03, base); |
750 | outw(linuxb_to_isib[baud] << 8 | 0x03, base); | |
751 | channel_setup = 0; | |
752 | switch(C_CSIZE(tty)) { | |
d8d16e47 JS |
753 | case CS5: |
754 | channel_setup |= ISICOM_CS5; | |
755 | break; | |
756 | case CS6: | |
757 | channel_setup |= ISICOM_CS6; | |
758 | break; | |
759 | case CS7: | |
760 | channel_setup |= ISICOM_CS7; | |
761 | break; | |
762 | case CS8: | |
763 | channel_setup |= ISICOM_CS8; | |
764 | break; | |
1da177e4 | 765 | } |
d8d16e47 | 766 | |
1da177e4 LT |
767 | if (C_CSTOPB(tty)) |
768 | channel_setup |= ISICOM_2SB; | |
769 | if (C_PARENB(tty)) { | |
770 | channel_setup |= ISICOM_EVPAR; | |
771 | if (C_PARODD(tty)) | |
d8d16e47 | 772 | channel_setup |= ISICOM_ODPAR; |
1da177e4 | 773 | } |
d8d16e47 | 774 | outw(channel_setup, base); |
1da177e4 | 775 | InterruptTheCard(base); |
d8d16e47 | 776 | } |
1da177e4 LT |
777 | if (C_CLOCAL(tty)) |
778 | port->flags &= ~ASYNC_CHECK_CD; | |
779 | else | |
d8d16e47 JS |
780 | port->flags |= ASYNC_CHECK_CD; |
781 | ||
1da177e4 LT |
782 | /* flow control settings ...*/ |
783 | flow_ctrl = 0; | |
784 | port->flags &= ~ASYNC_CTS_FLOW; | |
785 | if (C_CRTSCTS(tty)) { | |
786 | port->flags |= ASYNC_CTS_FLOW; | |
787 | flow_ctrl |= ISICOM_CTSRTS; | |
d8d16e47 JS |
788 | } |
789 | if (I_IXON(tty)) | |
1da177e4 LT |
790 | flow_ctrl |= ISICOM_RESPOND_XONXOFF; |
791 | if (I_IXOFF(tty)) | |
d8d16e47 JS |
792 | flow_ctrl |= ISICOM_INITIATE_XONXOFF; |
793 | ||
cfe7c09a | 794 | if (WaitTillCardIsFree(base) == 0) { |
1da177e4 LT |
795 | outw(0x8000 | (channel << shift_count) |0x04, base); |
796 | outw(flow_ctrl << 8 | 0x05, base); | |
797 | outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base); | |
798 | InterruptTheCard(base); | |
1da177e4 | 799 | } |
d8d16e47 | 800 | |
1da177e4 LT |
801 | /* rx enabled -> enable port for rx on the card */ |
802 | if (C_CREAD(tty)) { | |
803 | card->port_status |= (1 << channel); | |
804 | outw(card->port_status, base + 0x02); | |
805 | } | |
806 | } | |
1da177e4 | 807 | |
d8d16e47 JS |
808 | /* open et all */ |
809 | ||
810 | static inline void isicom_setup_board(struct isi_board *bp) | |
1da177e4 LT |
811 | { |
812 | int channel; | |
d8d16e47 | 813 | struct isi_port *port; |
1da177e4 | 814 | unsigned long flags; |
d8d16e47 | 815 | |
1da177e4 LT |
816 | spin_lock_irqsave(&bp->card_lock, flags); |
817 | if (bp->status & BOARD_ACTIVE) { | |
818 | spin_unlock_irqrestore(&bp->card_lock, flags); | |
819 | return; | |
820 | } | |
821 | port = bp->ports; | |
822 | bp->status |= BOARD_ACTIVE; | |
d8d16e47 | 823 | for (channel = 0; channel < bp->port_count; channel++, port++) |
1da177e4 | 824 | drop_dtr_rts(port); |
cfe7c09a | 825 | spin_unlock_irqrestore(&bp->card_lock, flags); |
1da177e4 | 826 | } |
d8d16e47 JS |
827 | |
828 | static int isicom_setup_port(struct isi_port *port) | |
1da177e4 | 829 | { |
d8d16e47 | 830 | struct isi_board *card = port->card; |
1da177e4 | 831 | unsigned long flags; |
d8d16e47 | 832 | |
1da177e4 LT |
833 | if (port->flags & ASYNC_INITIALIZED) { |
834 | return 0; | |
835 | } | |
836 | if (!port->xmit_buf) { | |
837 | unsigned long page; | |
d8d16e47 | 838 | |
1da177e4 LT |
839 | if (!(page = get_zeroed_page(GFP_KERNEL))) |
840 | return -ENOMEM; | |
d8d16e47 | 841 | |
1da177e4 LT |
842 | if (port->xmit_buf) { |
843 | free_page(page); | |
844 | return -ERESTARTSYS; | |
845 | } | |
d8d16e47 JS |
846 | port->xmit_buf = (unsigned char *) page; |
847 | } | |
1da177e4 LT |
848 | |
849 | spin_lock_irqsave(&card->card_lock, flags); | |
850 | if (port->tty) | |
851 | clear_bit(TTY_IO_ERROR, &port->tty->flags); | |
852 | if (port->count == 1) | |
853 | card->count++; | |
d8d16e47 | 854 | |
1da177e4 | 855 | port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; |
d8d16e47 | 856 | |
1da177e4 | 857 | /* discard any residual data */ |
cfe7c09a JS |
858 | if (WaitTillCardIsFree(card->base) == 0) { |
859 | outw(0x8000 | (port->channel << card->shift_count) | 0x02, | |
860 | card->base); | |
861 | outw(((ISICOM_KILLTX | ISICOM_KILLRX) << 8) | 0x06, card->base); | |
862 | InterruptTheCard(card->base); | |
863 | } | |
d8d16e47 | 864 | |
1da177e4 LT |
865 | isicom_config_port(port); |
866 | port->flags |= ASYNC_INITIALIZED; | |
867 | spin_unlock_irqrestore(&card->card_lock, flags); | |
d8d16e47 JS |
868 | |
869 | return 0; | |
870 | } | |
871 | ||
a547dfe9 JS |
872 | static int block_til_ready(struct tty_struct *tty, struct file *filp, |
873 | struct isi_port *port) | |
1da177e4 | 874 | { |
d8d16e47 | 875 | struct isi_board *card = port->card; |
1da177e4 LT |
876 | int do_clocal = 0, retval; |
877 | unsigned long flags; | |
878 | DECLARE_WAITQUEUE(wait, current); | |
879 | ||
880 | /* block if port is in the process of being closed */ | |
881 | ||
882 | if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) { | |
aaa246ea | 883 | pr_dbg("block_til_ready: close in progress.\n"); |
1da177e4 LT |
884 | interruptible_sleep_on(&port->close_wait); |
885 | if (port->flags & ASYNC_HUP_NOTIFY) | |
886 | return -EAGAIN; | |
887 | else | |
888 | return -ERESTARTSYS; | |
889 | } | |
d8d16e47 | 890 | |
1da177e4 | 891 | /* if non-blocking mode is set ... */ |
d8d16e47 | 892 | |
a547dfe9 JS |
893 | if ((filp->f_flags & O_NONBLOCK) || |
894 | (tty->flags & (1 << TTY_IO_ERROR))) { | |
aaa246ea | 895 | pr_dbg("block_til_ready: non-block mode.\n"); |
1da177e4 | 896 | port->flags |= ASYNC_NORMAL_ACTIVE; |
d8d16e47 JS |
897 | return 0; |
898 | } | |
899 | ||
1da177e4 LT |
900 | if (C_CLOCAL(tty)) |
901 | do_clocal = 1; | |
d8d16e47 JS |
902 | |
903 | /* block waiting for DCD to be asserted, and while | |
1da177e4 LT |
904 | callout dev is busy */ |
905 | retval = 0; | |
906 | add_wait_queue(&port->open_wait, &wait); | |
907 | ||
908 | spin_lock_irqsave(&card->card_lock, flags); | |
909 | if (!tty_hung_up_p(filp)) | |
910 | port->count--; | |
911 | port->blocked_open++; | |
912 | spin_unlock_irqrestore(&card->card_lock, flags); | |
d8d16e47 | 913 | |
1da177e4 LT |
914 | while (1) { |
915 | raise_dtr_rts(port); | |
916 | ||
917 | set_current_state(TASK_INTERRUPTIBLE); | |
d8d16e47 | 918 | if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) { |
1da177e4 LT |
919 | if (port->flags & ASYNC_HUP_NOTIFY) |
920 | retval = -EAGAIN; | |
921 | else | |
922 | retval = -ERESTARTSYS; | |
923 | break; | |
d8d16e47 | 924 | } |
1da177e4 | 925 | if (!(port->flags & ASYNC_CLOSING) && |
d8d16e47 | 926 | (do_clocal || (port->status & ISI_DCD))) { |
1da177e4 | 927 | break; |
d8d16e47 | 928 | } |
1da177e4 LT |
929 | if (signal_pending(current)) { |
930 | retval = -ERESTARTSYS; | |
931 | break; | |
932 | } | |
d8d16e47 | 933 | schedule(); |
1da177e4 LT |
934 | } |
935 | set_current_state(TASK_RUNNING); | |
936 | remove_wait_queue(&port->open_wait, &wait); | |
937 | spin_lock_irqsave(&card->card_lock, flags); | |
938 | if (!tty_hung_up_p(filp)) | |
939 | port->count++; | |
940 | port->blocked_open--; | |
941 | spin_unlock_irqrestore(&card->card_lock, flags); | |
942 | if (retval) | |
943 | return retval; | |
944 | port->flags |= ASYNC_NORMAL_ACTIVE; | |
945 | return 0; | |
946 | } | |
d8d16e47 JS |
947 | |
948 | static int isicom_open(struct tty_struct *tty, struct file *filp) | |
1da177e4 | 949 | { |
d8d16e47 JS |
950 | struct isi_port *port; |
951 | struct isi_board *card; | |
17c4edf0 JS |
952 | unsigned int board; |
953 | int error, line; | |
1da177e4 LT |
954 | |
955 | line = tty->index; | |
956 | if (line < 0 || line > PORT_COUNT-1) | |
957 | return -ENODEV; | |
958 | board = BOARD(line); | |
959 | card = &isi_card[board]; | |
d8d16e47 | 960 | |
1da177e4 LT |
961 | if (!(card->status & FIRMWARE_LOADED)) |
962 | return -ENODEV; | |
d8d16e47 | 963 | |
1da177e4 LT |
964 | /* open on a port greater than the port count for the card !!! */ |
965 | if (line > ((board * 16) + card->port_count - 1)) | |
966 | return -ENODEV; | |
967 | ||
d8d16e47 | 968 | port = &isi_ports[line]; |
1da177e4 LT |
969 | if (isicom_paranoia_check(port, tty->name, "isicom_open")) |
970 | return -ENODEV; | |
d8d16e47 JS |
971 | |
972 | isicom_setup_board(card); | |
973 | ||
1da177e4 LT |
974 | port->count++; |
975 | tty->driver_data = port; | |
976 | port->tty = tty; | |
977 | if ((error = isicom_setup_port(port))!=0) | |
978 | return error; | |
979 | if ((error = block_til_ready(tty, filp, port))!=0) | |
980 | return error; | |
981 | ||
d8d16e47 | 982 | return 0; |
1da177e4 | 983 | } |
d8d16e47 | 984 | |
1da177e4 LT |
985 | /* close et all */ |
986 | ||
d8d16e47 | 987 | static inline void isicom_shutdown_board(struct isi_board *bp) |
1da177e4 | 988 | { |
1da177e4 LT |
989 | if (bp->status & BOARD_ACTIVE) { |
990 | bp->status &= ~BOARD_ACTIVE; | |
991 | } | |
1da177e4 LT |
992 | } |
993 | ||
cfe7c09a | 994 | /* card->lock HAS to be held */ |
d8d16e47 | 995 | static void isicom_shutdown_port(struct isi_port *port) |
1da177e4 | 996 | { |
d8d16e47 JS |
997 | struct isi_board *card = port->card; |
998 | struct tty_struct *tty; | |
d8d16e47 | 999 | |
1da177e4 LT |
1000 | tty = port->tty; |
1001 | ||
cfe7c09a | 1002 | if (!(port->flags & ASYNC_INITIALIZED)) |
1da177e4 | 1003 | return; |
cfe7c09a | 1004 | |
1da177e4 LT |
1005 | if (port->xmit_buf) { |
1006 | free_page((unsigned long) port->xmit_buf); | |
1007 | port->xmit_buf = NULL; | |
d8d16e47 | 1008 | } |
1da177e4 LT |
1009 | port->flags &= ~ASYNC_INITIALIZED; |
1010 | /* 3rd October 2000 : Vinayak P Risbud */ | |
1011 | port->tty = NULL; | |
d8d16e47 | 1012 | |
1da177e4 LT |
1013 | /*Fix done by Anil .S on 30-04-2001 |
1014 | remote login through isi port has dtr toggle problem | |
1015 | due to which the carrier drops before the password prompt | |
d8d16e47 | 1016 | appears on the remote end. Now we drop the dtr only if the |
1da177e4 | 1017 | HUPCL(Hangup on close) flag is set for the tty*/ |
d8d16e47 JS |
1018 | |
1019 | if (C_HUPCL(tty)) | |
1da177e4 LT |
1020 | /* drop dtr on this port */ |
1021 | drop_dtr(port); | |
d8d16e47 JS |
1022 | |
1023 | /* any other port uninits */ | |
1da177e4 LT |
1024 | if (tty) |
1025 | set_bit(TTY_IO_ERROR, &tty->flags); | |
d8d16e47 | 1026 | |
1da177e4 | 1027 | if (--card->count < 0) { |
aaa246ea | 1028 | pr_dbg("isicom_shutdown_port: bad board(0x%lx) count %d.\n", |
1da177e4 | 1029 | card->base, card->count); |
d8d16e47 | 1030 | card->count = 0; |
1da177e4 | 1031 | } |
d8d16e47 | 1032 | |
a547dfe9 | 1033 | /* last port was closed, shutdown that boad too */ |
d8d16e47 | 1034 | if (C_HUPCL(tty)) { |
1da177e4 LT |
1035 | if (!card->count) |
1036 | isicom_shutdown_board(card); | |
1037 | } | |
1038 | } | |
1039 | ||
d8d16e47 | 1040 | static void isicom_close(struct tty_struct *tty, struct file *filp) |
1da177e4 | 1041 | { |
8070e35c | 1042 | struct isi_port *port = tty->driver_data; |
c387fd85 | 1043 | struct isi_board *card; |
1da177e4 | 1044 | unsigned long flags; |
d8d16e47 | 1045 | |
1da177e4 LT |
1046 | if (!port) |
1047 | return; | |
c387fd85 | 1048 | card = port->card; |
1da177e4 LT |
1049 | if (isicom_paranoia_check(port, tty->name, "isicom_close")) |
1050 | return; | |
d8d16e47 | 1051 | |
aaa246ea | 1052 | pr_dbg("Close start!!!.\n"); |
d8d16e47 | 1053 | |
1da177e4 LT |
1054 | spin_lock_irqsave(&card->card_lock, flags); |
1055 | if (tty_hung_up_p(filp)) { | |
1056 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1057 | return; | |
1058 | } | |
d8d16e47 | 1059 | |
1da177e4 | 1060 | if (tty->count == 1 && port->count != 1) { |
a547dfe9 JS |
1061 | printk(KERN_WARNING "ISICOM:(0x%lx) isicom_close: bad port " |
1062 | "count tty->count = 1 port count = %d.\n", | |
1da177e4 LT |
1063 | card->base, port->count); |
1064 | port->count = 1; | |
1065 | } | |
1066 | if (--port->count < 0) { | |
a547dfe9 JS |
1067 | printk(KERN_WARNING "ISICOM:(0x%lx) isicom_close: bad port " |
1068 | "count for channel%d = %d", card->base, port->channel, | |
1da177e4 | 1069 | port->count); |
d8d16e47 | 1070 | port->count = 0; |
1da177e4 | 1071 | } |
d8d16e47 | 1072 | |
1da177e4 LT |
1073 | if (port->count) { |
1074 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1075 | return; | |
d8d16e47 | 1076 | } |
1da177e4 LT |
1077 | port->flags |= ASYNC_CLOSING; |
1078 | tty->closing = 1; | |
1079 | spin_unlock_irqrestore(&card->card_lock, flags); | |
d8d16e47 | 1080 | |
1da177e4 LT |
1081 | if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE) |
1082 | tty_wait_until_sent(tty, port->closing_wait); | |
d8d16e47 | 1083 | /* indicate to the card that no more data can be received |
1da177e4 LT |
1084 | on this port */ |
1085 | spin_lock_irqsave(&card->card_lock, flags); | |
d8d16e47 | 1086 | if (port->flags & ASYNC_INITIALIZED) { |
1da177e4 LT |
1087 | card->port_status &= ~(1 << port->channel); |
1088 | outw(card->port_status, card->base + 0x02); | |
d8d16e47 | 1089 | } |
1da177e4 LT |
1090 | isicom_shutdown_port(port); |
1091 | spin_unlock_irqrestore(&card->card_lock, flags); | |
d8d16e47 | 1092 | |
1da177e4 LT |
1093 | if (tty->driver->flush_buffer) |
1094 | tty->driver->flush_buffer(tty); | |
1095 | tty_ldisc_flush(tty); | |
1096 | ||
1097 | spin_lock_irqsave(&card->card_lock, flags); | |
1098 | tty->closing = 0; | |
1099 | ||
1100 | if (port->blocked_open) { | |
1101 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1102 | if (port->close_delay) { | |
aaa246ea | 1103 | pr_dbg("scheduling until time out.\n"); |
a547dfe9 JS |
1104 | msleep_interruptible( |
1105 | jiffies_to_msecs(port->close_delay)); | |
1da177e4 LT |
1106 | } |
1107 | spin_lock_irqsave(&card->card_lock, flags); | |
1108 | wake_up_interruptible(&port->open_wait); | |
d8d16e47 | 1109 | } |
1da177e4 LT |
1110 | port->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING); |
1111 | wake_up_interruptible(&port->close_wait); | |
1112 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1113 | } | |
1114 | ||
1115 | /* write et all */ | |
d8d16e47 JS |
1116 | static int isicom_write(struct tty_struct *tty, const unsigned char *buf, |
1117 | int count) | |
1da177e4 | 1118 | { |
8070e35c | 1119 | struct isi_port *port = tty->driver_data; |
d8d16e47 | 1120 | struct isi_board *card = port->card; |
1da177e4 LT |
1121 | unsigned long flags; |
1122 | int cnt, total = 0; | |
1123 | ||
1124 | if (isicom_paranoia_check(port, tty->name, "isicom_write")) | |
1125 | return 0; | |
d8d16e47 | 1126 | |
326f28e9 | 1127 | if (!port->xmit_buf) |
1da177e4 | 1128 | return 0; |
d8d16e47 | 1129 | |
1da177e4 | 1130 | spin_lock_irqsave(&card->card_lock, flags); |
d8d16e47 JS |
1131 | |
1132 | while(1) { | |
a547dfe9 JS |
1133 | cnt = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt |
1134 | - 1, SERIAL_XMIT_SIZE - port->xmit_head)); | |
d8d16e47 | 1135 | if (cnt <= 0) |
1da177e4 | 1136 | break; |
d8d16e47 | 1137 | |
1da177e4 | 1138 | memcpy(port->xmit_buf + port->xmit_head, buf, cnt); |
a547dfe9 JS |
1139 | port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE |
1140 | - 1); | |
1da177e4 LT |
1141 | port->xmit_cnt += cnt; |
1142 | buf += cnt; | |
1143 | count -= cnt; | |
1144 | total += cnt; | |
d8d16e47 | 1145 | } |
1da177e4 LT |
1146 | if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped) |
1147 | port->status |= ISI_TXOK; | |
1148 | spin_unlock_irqrestore(&card->card_lock, flags); | |
d8d16e47 | 1149 | return total; |
1da177e4 LT |
1150 | } |
1151 | ||
1152 | /* put_char et all */ | |
d8d16e47 | 1153 | static void isicom_put_char(struct tty_struct *tty, unsigned char ch) |
1da177e4 | 1154 | { |
8070e35c | 1155 | struct isi_port *port = tty->driver_data; |
d8d16e47 | 1156 | struct isi_board *card = port->card; |
1da177e4 | 1157 | unsigned long flags; |
d8d16e47 | 1158 | |
1da177e4 LT |
1159 | if (isicom_paranoia_check(port, tty->name, "isicom_put_char")) |
1160 | return; | |
d8d16e47 | 1161 | |
326f28e9 | 1162 | if (!port->xmit_buf) |
1da177e4 LT |
1163 | return; |
1164 | ||
1165 | spin_lock_irqsave(&card->card_lock, flags); | |
1166 | if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) { | |
1167 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1168 | return; | |
1169 | } | |
d8d16e47 | 1170 | |
1da177e4 LT |
1171 | port->xmit_buf[port->xmit_head++] = ch; |
1172 | port->xmit_head &= (SERIAL_XMIT_SIZE - 1); | |
1173 | port->xmit_cnt++; | |
1174 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1175 | } | |
1176 | ||
1177 | /* flush_chars et all */ | |
d8d16e47 | 1178 | static void isicom_flush_chars(struct tty_struct *tty) |
1da177e4 | 1179 | { |
8070e35c | 1180 | struct isi_port *port = tty->driver_data; |
d8d16e47 | 1181 | |
1da177e4 LT |
1182 | if (isicom_paranoia_check(port, tty->name, "isicom_flush_chars")) |
1183 | return; | |
d8d16e47 | 1184 | |
a547dfe9 JS |
1185 | if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped || |
1186 | !port->xmit_buf) | |
1da177e4 | 1187 | return; |
d8d16e47 | 1188 | |
1da177e4 LT |
1189 | /* this tells the transmitter to consider this port for |
1190 | data output to the card ... that's the best we can do. */ | |
d8d16e47 | 1191 | port->status |= ISI_TXOK; |
1da177e4 LT |
1192 | } |
1193 | ||
1194 | /* write_room et all */ | |
d8d16e47 | 1195 | static int isicom_write_room(struct tty_struct *tty) |
1da177e4 | 1196 | { |
8070e35c | 1197 | struct isi_port *port = tty->driver_data; |
1da177e4 LT |
1198 | int free; |
1199 | ||
1200 | if (isicom_paranoia_check(port, tty->name, "isicom_write_room")) | |
1201 | return 0; | |
d8d16e47 | 1202 | |
1da177e4 LT |
1203 | free = SERIAL_XMIT_SIZE - port->xmit_cnt - 1; |
1204 | if (free < 0) | |
1205 | free = 0; | |
1206 | return free; | |
1207 | } | |
1208 | ||
1209 | /* chars_in_buffer et all */ | |
d8d16e47 | 1210 | static int isicom_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 1211 | { |
8070e35c | 1212 | struct isi_port *port = tty->driver_data; |
1da177e4 LT |
1213 | if (isicom_paranoia_check(port, tty->name, "isicom_chars_in_buffer")) |
1214 | return 0; | |
1215 | return port->xmit_cnt; | |
1216 | } | |
1217 | ||
1218 | /* ioctl et all */ | |
a547dfe9 JS |
1219 | static inline void isicom_send_break(struct isi_port *port, |
1220 | unsigned long length) | |
1da177e4 | 1221 | { |
d8d16e47 | 1222 | struct isi_board *card = port->card; |
8070e35c | 1223 | unsigned long base = card->base; |
d8d16e47 JS |
1224 | |
1225 | if (!lock_card(card)) | |
1da177e4 | 1226 | return; |
d8d16e47 | 1227 | |
1da177e4 LT |
1228 | outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base); |
1229 | outw((length & 0xff) << 8 | 0x00, base); | |
1230 | outw((length & 0xff00), base); | |
1231 | InterruptTheCard(base); | |
1232 | ||
1233 | unlock_card(card); | |
1234 | } | |
1235 | ||
1236 | static int isicom_tiocmget(struct tty_struct *tty, struct file *file) | |
1237 | { | |
8070e35c | 1238 | struct isi_port *port = tty->driver_data; |
1da177e4 | 1239 | /* just send the port status */ |
8070e35c | 1240 | u16 status = port->status; |
1da177e4 LT |
1241 | |
1242 | if (isicom_paranoia_check(port, tty->name, "isicom_ioctl")) | |
1243 | return -ENODEV; | |
d8d16e47 | 1244 | |
1da177e4 LT |
1245 | return ((status & ISI_RTS) ? TIOCM_RTS : 0) | |
1246 | ((status & ISI_DTR) ? TIOCM_DTR : 0) | | |
1247 | ((status & ISI_DCD) ? TIOCM_CAR : 0) | | |
1248 | ((status & ISI_DSR) ? TIOCM_DSR : 0) | | |
1249 | ((status & ISI_CTS) ? TIOCM_CTS : 0) | | |
1250 | ((status & ISI_RI ) ? TIOCM_RI : 0); | |
1251 | } | |
1252 | ||
1253 | static int isicom_tiocmset(struct tty_struct *tty, struct file *file, | |
d8d16e47 | 1254 | unsigned int set, unsigned int clear) |
1da177e4 | 1255 | { |
8070e35c | 1256 | struct isi_port *port = tty->driver_data; |
cfe7c09a | 1257 | unsigned long flags; |
d8d16e47 | 1258 | |
1da177e4 LT |
1259 | if (isicom_paranoia_check(port, tty->name, "isicom_ioctl")) |
1260 | return -ENODEV; | |
d8d16e47 | 1261 | |
cfe7c09a | 1262 | spin_lock_irqsave(&port->card->card_lock, flags); |
1da177e4 LT |
1263 | if (set & TIOCM_RTS) |
1264 | raise_rts(port); | |
1265 | if (set & TIOCM_DTR) | |
1266 | raise_dtr(port); | |
1267 | ||
1268 | if (clear & TIOCM_RTS) | |
1269 | drop_rts(port); | |
1270 | if (clear & TIOCM_DTR) | |
1271 | drop_dtr(port); | |
cfe7c09a | 1272 | spin_unlock_irqrestore(&port->card->card_lock, flags); |
1da177e4 LT |
1273 | |
1274 | return 0; | |
d8d16e47 | 1275 | } |
1da177e4 | 1276 | |
d8d16e47 JS |
1277 | static int isicom_set_serial_info(struct isi_port *port, |
1278 | struct serial_struct __user *info) | |
1da177e4 LT |
1279 | { |
1280 | struct serial_struct newinfo; | |
1281 | int reconfig_port; | |
1282 | ||
d8d16e47 | 1283 | if (copy_from_user(&newinfo, info, sizeof(newinfo))) |
1da177e4 | 1284 | return -EFAULT; |
d8d16e47 JS |
1285 | |
1286 | reconfig_port = ((port->flags & ASYNC_SPD_MASK) != | |
1287 | (newinfo.flags & ASYNC_SPD_MASK)); | |
1288 | ||
1da177e4 LT |
1289 | if (!capable(CAP_SYS_ADMIN)) { |
1290 | if ((newinfo.close_delay != port->close_delay) || | |
d8d16e47 JS |
1291 | (newinfo.closing_wait != port->closing_wait) || |
1292 | ((newinfo.flags & ~ASYNC_USR_MASK) != | |
1293 | (port->flags & ~ASYNC_USR_MASK))) | |
1da177e4 LT |
1294 | return -EPERM; |
1295 | port->flags = ((port->flags & ~ ASYNC_USR_MASK) | | |
1296 | (newinfo.flags & ASYNC_USR_MASK)); | |
d8d16e47 | 1297 | } |
1da177e4 LT |
1298 | else { |
1299 | port->close_delay = newinfo.close_delay; | |
d8d16e47 JS |
1300 | port->closing_wait = newinfo.closing_wait; |
1301 | port->flags = ((port->flags & ~ASYNC_FLAGS) | | |
1da177e4 LT |
1302 | (newinfo.flags & ASYNC_FLAGS)); |
1303 | } | |
1304 | if (reconfig_port) { | |
cfe7c09a JS |
1305 | unsigned long flags; |
1306 | spin_lock_irqsave(&port->card->card_lock, flags); | |
1da177e4 | 1307 | isicom_config_port(port); |
cfe7c09a | 1308 | spin_unlock_irqrestore(&port->card->card_lock, flags); |
1da177e4 | 1309 | } |
d8d16e47 JS |
1310 | return 0; |
1311 | } | |
1da177e4 | 1312 | |
d8d16e47 JS |
1313 | static int isicom_get_serial_info(struct isi_port *port, |
1314 | struct serial_struct __user *info) | |
1da177e4 LT |
1315 | { |
1316 | struct serial_struct out_info; | |
d8d16e47 | 1317 | |
1da177e4 LT |
1318 | memset(&out_info, 0, sizeof(out_info)); |
1319 | /* out_info.type = ? */ | |
1320 | out_info.line = port - isi_ports; | |
1321 | out_info.port = port->card->base; | |
1322 | out_info.irq = port->card->irq; | |
1323 | out_info.flags = port->flags; | |
1324 | /* out_info.baud_base = ? */ | |
1325 | out_info.close_delay = port->close_delay; | |
1326 | out_info.closing_wait = port->closing_wait; | |
d8d16e47 | 1327 | if (copy_to_user(info, &out_info, sizeof(out_info))) |
1da177e4 LT |
1328 | return -EFAULT; |
1329 | return 0; | |
d8d16e47 | 1330 | } |
1da177e4 | 1331 | |
d8d16e47 JS |
1332 | static int isicom_ioctl(struct tty_struct *tty, struct file *filp, |
1333 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1334 | { |
8070e35c | 1335 | struct isi_port *port = tty->driver_data; |
1da177e4 LT |
1336 | void __user *argp = (void __user *)arg; |
1337 | int retval; | |
1338 | ||
1339 | if (isicom_paranoia_check(port, tty->name, "isicom_ioctl")) | |
1340 | return -ENODEV; | |
1341 | ||
1342 | switch(cmd) { | |
d8d16e47 JS |
1343 | case TCSBRK: |
1344 | retval = tty_check_change(tty); | |
1345 | if (retval) | |
1346 | return retval; | |
1347 | tty_wait_until_sent(tty, 0); | |
1348 | if (!arg) | |
1349 | isicom_send_break(port, HZ/4); | |
1350 | return 0; | |
1351 | ||
1352 | case TCSBRKP: | |
1353 | retval = tty_check_change(tty); | |
1354 | if (retval) | |
1355 | return retval; | |
1356 | tty_wait_until_sent(tty, 0); | |
1357 | isicom_send_break(port, arg ? arg * (HZ/10) : HZ/4); | |
1358 | return 0; | |
1359 | ||
1360 | case TIOCGSOFTCAR: | |
a547dfe9 JS |
1361 | return put_user(C_CLOCAL(tty) ? 1 : 0, |
1362 | (unsigned long __user *)argp); | |
d8d16e47 JS |
1363 | |
1364 | case TIOCSSOFTCAR: | |
1365 | if (get_user(arg, (unsigned long __user *) argp)) | |
1366 | return -EFAULT; | |
1367 | tty->termios->c_cflag = | |
1368 | ((tty->termios->c_cflag & ~CLOCAL) | | |
1369 | (arg ? CLOCAL : 0)); | |
1370 | return 0; | |
1371 | ||
1372 | case TIOCGSERIAL: | |
1373 | return isicom_get_serial_info(port, argp); | |
1374 | ||
1375 | case TIOCSSERIAL: | |
1376 | return isicom_set_serial_info(port, argp); | |
1377 | ||
1378 | default: | |
1379 | return -ENOIOCTLCMD; | |
1da177e4 LT |
1380 | } |
1381 | return 0; | |
1382 | } | |
1383 | ||
1384 | /* set_termios et all */ | |
d8d16e47 | 1385 | static void isicom_set_termios(struct tty_struct *tty, |
606d099c | 1386 | struct ktermios *old_termios) |
1da177e4 | 1387 | { |
8070e35c | 1388 | struct isi_port *port = tty->driver_data; |
cfe7c09a | 1389 | unsigned long flags; |
d8d16e47 | 1390 | |
1da177e4 LT |
1391 | if (isicom_paranoia_check(port, tty->name, "isicom_set_termios")) |
1392 | return; | |
d8d16e47 | 1393 | |
1da177e4 | 1394 | if (tty->termios->c_cflag == old_termios->c_cflag && |
d8d16e47 | 1395 | tty->termios->c_iflag == old_termios->c_iflag) |
1da177e4 | 1396 | return; |
d8d16e47 | 1397 | |
cfe7c09a | 1398 | spin_lock_irqsave(&port->card->card_lock, flags); |
1da177e4 | 1399 | isicom_config_port(port); |
cfe7c09a | 1400 | spin_unlock_irqrestore(&port->card->card_lock, flags); |
d8d16e47 | 1401 | |
1da177e4 | 1402 | if ((old_termios->c_cflag & CRTSCTS) && |
d8d16e47 | 1403 | !(tty->termios->c_cflag & CRTSCTS)) { |
1da177e4 | 1404 | tty->hw_stopped = 0; |
d8d16e47 JS |
1405 | isicom_start(tty); |
1406 | } | |
1da177e4 LT |
1407 | } |
1408 | ||
1409 | /* throttle et all */ | |
d8d16e47 | 1410 | static void isicom_throttle(struct tty_struct *tty) |
1da177e4 | 1411 | { |
8070e35c | 1412 | struct isi_port *port = tty->driver_data; |
d8d16e47 JS |
1413 | struct isi_board *card = port->card; |
1414 | ||
1da177e4 LT |
1415 | if (isicom_paranoia_check(port, tty->name, "isicom_throttle")) |
1416 | return; | |
d8d16e47 | 1417 | |
1da177e4 LT |
1418 | /* tell the card that this port cannot handle any more data for now */ |
1419 | card->port_status &= ~(1 << port->channel); | |
1420 | outw(card->port_status, card->base + 0x02); | |
1421 | } | |
1422 | ||
1423 | /* unthrottle et all */ | |
d8d16e47 | 1424 | static void isicom_unthrottle(struct tty_struct *tty) |
1da177e4 | 1425 | { |
8070e35c | 1426 | struct isi_port *port = tty->driver_data; |
d8d16e47 JS |
1427 | struct isi_board *card = port->card; |
1428 | ||
1da177e4 LT |
1429 | if (isicom_paranoia_check(port, tty->name, "isicom_unthrottle")) |
1430 | return; | |
d8d16e47 | 1431 | |
1da177e4 LT |
1432 | /* tell the card that this port is ready to accept more data */ |
1433 | card->port_status |= (1 << port->channel); | |
1434 | outw(card->port_status, card->base + 0x02); | |
1435 | } | |
1436 | ||
1437 | /* stop et all */ | |
d8d16e47 | 1438 | static void isicom_stop(struct tty_struct *tty) |
1da177e4 | 1439 | { |
8070e35c | 1440 | struct isi_port *port = tty->driver_data; |
1da177e4 LT |
1441 | |
1442 | if (isicom_paranoia_check(port, tty->name, "isicom_stop")) | |
1443 | return; | |
d8d16e47 | 1444 | |
1da177e4 LT |
1445 | /* this tells the transmitter not to consider this port for |
1446 | data output to the card. */ | |
1447 | port->status &= ~ISI_TXOK; | |
1448 | } | |
1449 | ||
1450 | /* start et all */ | |
d8d16e47 | 1451 | static void isicom_start(struct tty_struct *tty) |
1da177e4 | 1452 | { |
8070e35c | 1453 | struct isi_port *port = tty->driver_data; |
d8d16e47 | 1454 | |
1da177e4 LT |
1455 | if (isicom_paranoia_check(port, tty->name, "isicom_start")) |
1456 | return; | |
d8d16e47 | 1457 | |
1da177e4 LT |
1458 | /* this tells the transmitter to consider this port for |
1459 | data output to the card. */ | |
1460 | port->status |= ISI_TXOK; | |
1461 | } | |
1462 | ||
1463 | /* hangup et all */ | |
c4028958 | 1464 | static void do_isicom_hangup(struct work_struct *work) |
1da177e4 | 1465 | { |
c4028958 | 1466 | struct isi_port *port = container_of(work, struct isi_port, hangup_tq); |
d8d16e47 JS |
1467 | struct tty_struct *tty; |
1468 | ||
1da177e4 LT |
1469 | tty = port->tty; |
1470 | if (tty) | |
1471 | tty_hangup(tty); | |
1472 | } | |
1473 | ||
d8d16e47 | 1474 | static void isicom_hangup(struct tty_struct *tty) |
1da177e4 | 1475 | { |
8070e35c | 1476 | struct isi_port *port = tty->driver_data; |
cfe7c09a | 1477 | unsigned long flags; |
d8d16e47 | 1478 | |
1da177e4 LT |
1479 | if (isicom_paranoia_check(port, tty->name, "isicom_hangup")) |
1480 | return; | |
d8d16e47 | 1481 | |
cfe7c09a | 1482 | spin_lock_irqsave(&port->card->card_lock, flags); |
1da177e4 | 1483 | isicom_shutdown_port(port); |
cfe7c09a JS |
1484 | spin_unlock_irqrestore(&port->card->card_lock, flags); |
1485 | ||
1da177e4 LT |
1486 | port->count = 0; |
1487 | port->flags &= ~ASYNC_NORMAL_ACTIVE; | |
1488 | port->tty = NULL; | |
1489 | wake_up_interruptible(&port->open_wait); | |
1490 | } | |
1491 | ||
1492 | /* flush_buffer et all */ | |
d8d16e47 | 1493 | static void isicom_flush_buffer(struct tty_struct *tty) |
1da177e4 | 1494 | { |
8070e35c | 1495 | struct isi_port *port = tty->driver_data; |
d8d16e47 | 1496 | struct isi_board *card = port->card; |
1da177e4 | 1497 | unsigned long flags; |
d8d16e47 | 1498 | |
1da177e4 LT |
1499 | if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer")) |
1500 | return; | |
d8d16e47 | 1501 | |
1da177e4 LT |
1502 | spin_lock_irqsave(&card->card_lock, flags); |
1503 | port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; | |
1504 | spin_unlock_irqrestore(&card->card_lock, flags); | |
d8d16e47 | 1505 | |
1da177e4 LT |
1506 | wake_up_interruptible(&tty->write_wait); |
1507 | tty_wakeup(tty); | |
1508 | } | |
1509 | ||
9ac0948b JS |
1510 | /* |
1511 | * Driver init and deinit functions | |
1512 | */ | |
1da177e4 | 1513 | |
b68e31d0 | 1514 | static const struct tty_operations isicom_ops = { |
d8d16e47 JS |
1515 | .open = isicom_open, |
1516 | .close = isicom_close, | |
1517 | .write = isicom_write, | |
1518 | .put_char = isicom_put_char, | |
1519 | .flush_chars = isicom_flush_chars, | |
1520 | .write_room = isicom_write_room, | |
1da177e4 | 1521 | .chars_in_buffer = isicom_chars_in_buffer, |
d8d16e47 JS |
1522 | .ioctl = isicom_ioctl, |
1523 | .set_termios = isicom_set_termios, | |
1524 | .throttle = isicom_throttle, | |
1525 | .unthrottle = isicom_unthrottle, | |
1526 | .stop = isicom_stop, | |
1527 | .start = isicom_start, | |
1528 | .hangup = isicom_hangup, | |
1529 | .flush_buffer = isicom_flush_buffer, | |
1530 | .tiocmget = isicom_tiocmget, | |
1531 | .tiocmset = isicom_tiocmset, | |
1da177e4 LT |
1532 | }; |
1533 | ||
9ac0948b JS |
1534 | static int __devinit reset_card(struct pci_dev *pdev, |
1535 | const unsigned int card, unsigned int *signature) | |
1da177e4 | 1536 | { |
9ac0948b JS |
1537 | struct isi_board *board = pci_get_drvdata(pdev); |
1538 | unsigned long base = board->base; | |
1539 | unsigned int portcount = 0; | |
1540 | int retval = 0; | |
d8d16e47 | 1541 | |
9ac0948b JS |
1542 | dev_dbg(&pdev->dev, "ISILoad:Resetting Card%d at 0x%lx\n", card + 1, |
1543 | base); | |
d8d16e47 | 1544 | |
9ac0948b | 1545 | inw(base + 0x8); |
d8d16e47 | 1546 | |
9ac0948b JS |
1547 | mdelay(10); |
1548 | ||
1549 | outw(0, base + 0x8); /* Reset */ | |
1550 | ||
1551 | msleep(3000); | |
1552 | ||
1553 | *signature = inw(base + 0x4) & 0xff; | |
1554 | ||
18234f88 JS |
1555 | portcount = inw(base + 0x2); |
1556 | if (!(inw(base + 0xe) & 0x1) || ((portcount != 0) && | |
1557 | (portcount != 4) && (portcount != 8))) { | |
1558 | dev_dbg(&pdev->dev, "base+0x2=0x%lx, base+0xe=0x%lx\n", | |
1559 | inw(base + 0x2), inw(base + 0xe)); | |
1560 | dev_err(&pdev->dev, "ISILoad:PCI Card%d reset failure " | |
1561 | "(Possible bad I/O Port Address 0x%lx).\n", | |
1562 | card + 1, base); | |
1563 | retval = -EIO; | |
1564 | goto end; | |
9ac0948b JS |
1565 | } |
1566 | ||
1567 | switch (*signature) { | |
1568 | case 0xa5: | |
1569 | case 0xbb: | |
1570 | case 0xdd: | |
18234f88 | 1571 | board->port_count = (portcount == 4) ? 4 : 8; |
9ac0948b JS |
1572 | board->shift_count = 12; |
1573 | break; | |
1574 | case 0xcc: | |
1575 | board->port_count = 16; | |
1576 | board->shift_count = 11; | |
1577 | break; | |
1578 | default: | |
1579 | dev_warn(&pdev->dev, "ISILoad:Card%d reset failure (Possible " | |
1580 | "bad I/O Port Address 0x%lx).\n", card + 1, base); | |
1581 | dev_dbg(&pdev->dev, "Sig=0x%lx\n", signature); | |
1582 | retval = -EIO; | |
d8d16e47 | 1583 | } |
9ac0948b | 1584 | dev_info(&pdev->dev, "-Done\n"); |
d8d16e47 | 1585 | |
9ac0948b JS |
1586 | end: |
1587 | return retval; | |
1da177e4 LT |
1588 | } |
1589 | ||
e65c1db1 JS |
1590 | static int __devinit load_firmware(struct pci_dev *pdev, |
1591 | const unsigned int index, const unsigned int signature) | |
1592 | { | |
1593 | struct isi_board *board = pci_get_drvdata(pdev); | |
1594 | const struct firmware *fw; | |
1595 | unsigned long base = board->base; | |
1596 | unsigned int a; | |
1597 | u16 word_count, status; | |
1598 | int retval = -EIO; | |
1599 | char *name; | |
1600 | u8 *data; | |
1601 | ||
1602 | struct stframe { | |
1603 | u16 addr; | |
1604 | u16 count; | |
1605 | u8 data[0]; | |
1606 | } *frame; | |
1607 | ||
1608 | switch (signature) { | |
1609 | case 0xa5: | |
1610 | name = "isi608.bin"; | |
1611 | break; | |
1612 | case 0xbb: | |
1613 | name = "isi608em.bin"; | |
1614 | break; | |
1615 | case 0xcc: | |
1616 | name = "isi616em.bin"; | |
1617 | break; | |
1618 | case 0xdd: | |
1619 | name = "isi4608.bin"; | |
1620 | break; | |
1621 | case 0xee: | |
1622 | name = "isi4616.bin"; | |
1623 | break; | |
1624 | default: | |
1625 | dev_err(&pdev->dev, "Unknown signature.\n"); | |
1626 | goto end; | |
1627 | } | |
1628 | ||
1629 | retval = request_firmware(&fw, name, &pdev->dev); | |
1630 | if (retval) | |
1631 | goto end; | |
1632 | ||
e4e04088 JS |
1633 | retval = -EIO; |
1634 | ||
e65c1db1 JS |
1635 | for (frame = (struct stframe *)fw->data; |
1636 | frame < (struct stframe *)(fw->data + fw->size); | |
e4e04088 JS |
1637 | frame = (struct stframe *)((u8 *)(frame + 1) + |
1638 | frame->count)) { | |
e65c1db1 JS |
1639 | if (WaitTillCardIsFree(base)) |
1640 | goto errrelfw; | |
1641 | ||
1642 | outw(0xf0, base); /* start upload sequence */ | |
1643 | outw(0x00, base); | |
1644 | outw(frame->addr, base); /* lsb of address */ | |
1645 | ||
1646 | word_count = frame->count / 2 + frame->count % 2; | |
1647 | outw(word_count, base); | |
1648 | InterruptTheCard(base); | |
1649 | ||
1650 | udelay(100); /* 0x2f */ | |
1651 | ||
1652 | if (WaitTillCardIsFree(base)) | |
1653 | goto errrelfw; | |
1654 | ||
1655 | if ((status = inw(base + 0x4)) != 0) { | |
1656 | dev_warn(&pdev->dev, "Card%d rejected load header:\n" | |
1657 | "Address:0x%x\nCount:0x%x\nStatus:0x%x\n", | |
1658 | index + 1, frame->addr, frame->count, status); | |
1659 | goto errrelfw; | |
1660 | } | |
1661 | outsw(base, frame->data, word_count); | |
1662 | ||
1663 | InterruptTheCard(base); | |
1664 | ||
1665 | udelay(50); /* 0x0f */ | |
1666 | ||
1667 | if (WaitTillCardIsFree(base)) | |
1668 | goto errrelfw; | |
1669 | ||
1670 | if ((status = inw(base + 0x4)) != 0) { | |
1671 | dev_err(&pdev->dev, "Card%d got out of sync.Card " | |
1672 | "Status:0x%x\n", index + 1, status); | |
1673 | goto errrelfw; | |
1674 | } | |
1675 | } | |
1676 | ||
e65c1db1 JS |
1677 | /* XXX: should we test it by reading it back and comparing with original like |
1678 | * in load firmware package? */ | |
e4e04088 JS |
1679 | for (frame = (struct stframe *)fw->data; |
1680 | frame < (struct stframe *)(fw->data + fw->size); | |
1681 | frame = (struct stframe *)((u8 *)(frame + 1) + | |
1682 | frame->count)) { | |
e65c1db1 JS |
1683 | if (WaitTillCardIsFree(base)) |
1684 | goto errrelfw; | |
1685 | ||
1686 | outw(0xf1, base); /* start download sequence */ | |
1687 | outw(0x00, base); | |
1688 | outw(frame->addr, base); /* lsb of address */ | |
1689 | ||
1690 | word_count = (frame->count >> 1) + frame->count % 2; | |
1691 | outw(word_count + 1, base); | |
1692 | InterruptTheCard(base); | |
1693 | ||
1694 | udelay(50); /* 0xf */ | |
1695 | ||
1696 | if (WaitTillCardIsFree(base)) | |
1697 | goto errrelfw; | |
1698 | ||
1699 | if ((status = inw(base + 0x4)) != 0) { | |
1700 | dev_warn(&pdev->dev, "Card%d rejected verify header:\n" | |
1701 | "Address:0x%x\nCount:0x%x\nStatus: 0x%x\n", | |
1702 | index + 1, frame->addr, frame->count, status); | |
1703 | goto errrelfw; | |
1704 | } | |
1705 | ||
1706 | data = kmalloc(word_count * 2, GFP_KERNEL); | |
f0671378 JS |
1707 | if (data == NULL) { |
1708 | dev_err(&pdev->dev, "Card%d, firmware upload " | |
1709 | "failed, not enough memory\n", index + 1); | |
1710 | goto errrelfw; | |
1711 | } | |
e65c1db1 JS |
1712 | inw(base); |
1713 | insw(base, data, word_count); | |
1714 | InterruptTheCard(base); | |
1715 | ||
1716 | for (a = 0; a < frame->count; a++) | |
1717 | if (data[a] != frame->data[a]) { | |
1718 | kfree(data); | |
1719 | dev_err(&pdev->dev, "Card%d, firmware upload " | |
1720 | "failed\n", index + 1); | |
1721 | goto errrelfw; | |
1722 | } | |
1723 | kfree(data); | |
1724 | ||
1725 | udelay(50); /* 0xf */ | |
1726 | ||
1727 | if (WaitTillCardIsFree(base)) | |
1728 | goto errrelfw; | |
1729 | ||
1730 | if ((status = inw(base + 0x4)) != 0) { | |
1731 | dev_err(&pdev->dev, "Card%d verify got out of sync. " | |
1732 | "Card Status:0x%x\n", index + 1, status); | |
1733 | goto errrelfw; | |
1734 | } | |
1735 | } | |
1736 | ||
e4e04088 JS |
1737 | /* xfer ctrl */ |
1738 | if (WaitTillCardIsFree(base)) | |
1739 | goto errrelfw; | |
1740 | ||
1741 | outw(0xf2, base); | |
1742 | outw(0x800, base); | |
1743 | outw(0x0, base); | |
1744 | outw(0x0, base); | |
1745 | InterruptTheCard(base); | |
1746 | outw(0x0, base + 0x4); /* for ISI4608 cards */ | |
1747 | ||
e65c1db1 JS |
1748 | board->status |= FIRMWARE_LOADED; |
1749 | retval = 0; | |
1750 | ||
1751 | errrelfw: | |
1752 | release_firmware(fw); | |
1753 | end: | |
1754 | return retval; | |
1755 | } | |
1756 | ||
1da177e4 LT |
1757 | /* |
1758 | * Insmod can set static symbols so keep these static | |
1759 | */ | |
9ac0948b JS |
1760 | static int card; |
1761 | ||
1762 | static int __devinit isicom_probe(struct pci_dev *pdev, | |
1763 | const struct pci_device_id *ent) | |
1764 | { | |
1765 | unsigned int ioaddr, signature, index; | |
1766 | int retval = -EPERM; | |
1767 | u8 pciirq; | |
1768 | struct isi_board *board = NULL; | |
1769 | ||
1770 | if (card >= BOARD_COUNT) | |
1771 | goto err; | |
1772 | ||
1773 | ioaddr = pci_resource_start(pdev, 3); | |
1774 | /* i.e at offset 0x1c in the PCI configuration register space. */ | |
1775 | pciirq = pdev->irq; | |
1776 | dev_info(&pdev->dev, "ISI PCI Card(Device ID 0x%x)\n", ent->device); | |
1777 | ||
1778 | /* allot the first empty slot in the array */ | |
1779 | for (index = 0; index < BOARD_COUNT; index++) | |
1780 | if (isi_card[index].base == 0) { | |
1781 | board = &isi_card[index]; | |
1782 | break; | |
1783 | } | |
1784 | ||
938a7023 | 1785 | board->index = index; |
9ac0948b JS |
1786 | board->base = ioaddr; |
1787 | board->irq = pciirq; | |
9ac0948b JS |
1788 | card++; |
1789 | ||
1790 | pci_set_drvdata(pdev, board); | |
1791 | ||
78028da9 JS |
1792 | retval = pci_request_region(pdev, 3, ISICOM_NAME); |
1793 | if (retval) { | |
09a4a112 JS |
1794 | dev_err(&pdev->dev, "I/O Region 0x%lx-0x%lx is busy. Card%d " |
1795 | "will be disabled.\n", board->base, board->base + 15, | |
1796 | index + 1); | |
1797 | retval = -EBUSY; | |
9ac0948b | 1798 | goto err; |
09a4a112 | 1799 | } |
9ac0948b | 1800 | |
09a4a112 JS |
1801 | retval = request_irq(board->irq, isicom_interrupt, |
1802 | IRQF_SHARED | IRQF_DISABLED, ISICOM_NAME, board); | |
1803 | if (retval < 0) { | |
1804 | dev_err(&pdev->dev, "Could not install handler at Irq %d. " | |
1805 | "Card%d will be disabled.\n", board->irq, index + 1); | |
9ac0948b | 1806 | goto errunrr; |
09a4a112 | 1807 | } |
9ac0948b JS |
1808 | |
1809 | retval = reset_card(pdev, index, &signature); | |
1810 | if (retval < 0) | |
1811 | goto errunri; | |
1812 | ||
e65c1db1 JS |
1813 | retval = load_firmware(pdev, index, signature); |
1814 | if (retval < 0) | |
1815 | goto errunri; | |
1816 | ||
938a7023 JS |
1817 | for (index = 0; index < board->port_count; index++) |
1818 | tty_register_device(isicom_normal, board->index * 16 + index, | |
1819 | &pdev->dev); | |
1820 | ||
9ac0948b JS |
1821 | return 0; |
1822 | ||
1823 | errunri: | |
1824 | free_irq(board->irq, board); | |
1825 | errunrr: | |
78028da9 | 1826 | pci_release_region(pdev, 3); |
9ac0948b JS |
1827 | err: |
1828 | board->base = 0; | |
1829 | return retval; | |
1830 | } | |
1831 | ||
1832 | static void __devexit isicom_remove(struct pci_dev *pdev) | |
1833 | { | |
1834 | struct isi_board *board = pci_get_drvdata(pdev); | |
938a7023 JS |
1835 | unsigned int i; |
1836 | ||
1837 | for (i = 0; i < board->port_count; i++) | |
1838 | tty_unregister_device(isicom_normal, board->index * 16 + i); | |
9ac0948b JS |
1839 | |
1840 | free_irq(board->irq, board); | |
78028da9 | 1841 | pci_release_region(pdev, 3); |
9ac0948b | 1842 | } |
1da177e4 | 1843 | |
ca262005 | 1844 | static int __init isicom_init(void) |
1da177e4 | 1845 | { |
9ac0948b JS |
1846 | int retval, idx, channel; |
1847 | struct isi_port *port; | |
d8d16e47 | 1848 | |
1da177e4 | 1849 | card = 0; |
d8d16e47 | 1850 | |
9ac0948b JS |
1851 | for(idx = 0; idx < BOARD_COUNT; idx++) { |
1852 | port = &isi_ports[idx * 16]; | |
1853 | isi_card[idx].ports = port; | |
1854 | spin_lock_init(&isi_card[idx].card_lock); | |
1855 | for (channel = 0; channel < 16; channel++, port++) { | |
1856 | port->magic = ISICOM_MAGIC; | |
1857 | port->card = &isi_card[idx]; | |
1858 | port->channel = channel; | |
1859 | port->close_delay = 50 * HZ/100; | |
1860 | port->closing_wait = 3000 * HZ/100; | |
c4028958 DH |
1861 | INIT_WORK(&port->hangup_tq, do_isicom_hangup); |
1862 | INIT_WORK(&port->bh_tqueue, isicom_bottomhalf); | |
9ac0948b JS |
1863 | port->status = 0; |
1864 | init_waitqueue_head(&port->open_wait); | |
1865 | init_waitqueue_head(&port->close_wait); | |
1866 | /* . . . */ | |
1867 | } | |
1868 | isi_card[idx].base = 0; | |
1869 | isi_card[idx].irq = 0; | |
1da177e4 | 1870 | } |
d8d16e47 | 1871 | |
09a4a112 JS |
1872 | /* tty driver structure initialization */ |
1873 | isicom_normal = alloc_tty_driver(PORT_COUNT); | |
1874 | if (!isicom_normal) { | |
1875 | retval = -ENOMEM; | |
9ac0948b | 1876 | goto error; |
09a4a112 JS |
1877 | } |
1878 | ||
1879 | isicom_normal->owner = THIS_MODULE; | |
1880 | isicom_normal->name = "ttyM"; | |
1881 | isicom_normal->major = ISICOM_NMAJOR; | |
1882 | isicom_normal->minor_start = 0; | |
1883 | isicom_normal->type = TTY_DRIVER_TYPE_SERIAL; | |
1884 | isicom_normal->subtype = SERIAL_TYPE_NORMAL; | |
1885 | isicom_normal->init_termios = tty_std_termios; | |
1886 | isicom_normal->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | | |
1887 | CLOCAL; | |
938a7023 JS |
1888 | isicom_normal->flags = TTY_DRIVER_REAL_RAW | |
1889 | TTY_DRIVER_DYNAMIC_DEV; | |
09a4a112 JS |
1890 | tty_set_operations(isicom_normal, &isicom_ops); |
1891 | ||
1892 | retval = tty_register_driver(isicom_normal); | |
1893 | if (retval) { | |
1894 | pr_dbg("Couldn't register the dialin driver\n"); | |
1895 | goto err_puttty; | |
1896 | } | |
1da177e4 | 1897 | |
9ac0948b | 1898 | retval = pci_register_driver(&isicom_driver); |
1da177e4 | 1899 | if (retval < 0) { |
9ac0948b | 1900 | printk(KERN_ERR "ISICOM: Unable to register pci driver.\n"); |
09a4a112 | 1901 | goto err_unrtty; |
1da177e4 | 1902 | } |
d8d16e47 | 1903 | |
34b55b86 | 1904 | mod_timer(&tx, jiffies + 1); |
d8d16e47 | 1905 | |
1da177e4 | 1906 | return 0; |
09a4a112 JS |
1907 | err_unrtty: |
1908 | tty_unregister_driver(isicom_normal); | |
1909 | err_puttty: | |
1910 | put_tty_driver(isicom_normal); | |
9ac0948b JS |
1911 | error: |
1912 | return retval; | |
1da177e4 LT |
1913 | } |
1914 | ||
1915 | static void __exit isicom_exit(void) | |
1916 | { | |
1917 | re_schedule = 0; | |
aaa246ea | 1918 | |
906cdecb | 1919 | wait_for_completion_timeout(&isi_timerdone, HZ); |
aaa246ea | 1920 | |
9ac0948b | 1921 | pci_unregister_driver(&isicom_driver); |
09a4a112 JS |
1922 | tty_unregister_driver(isicom_normal); |
1923 | put_tty_driver(isicom_normal); | |
1da177e4 LT |
1924 | } |
1925 | ||
ca262005 | 1926 | module_init(isicom_init); |
1da177e4 | 1927 | module_exit(isicom_exit); |
aaa246ea JS |
1928 | |
1929 | MODULE_AUTHOR("MultiTech"); | |
1930 | MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech"); | |
1931 | MODULE_LICENSE("GPL"); |