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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 | |
1da177e4 LT |
233 | static int lock_card(struct isi_board *card) |
234 | { | |
235 | char retries; | |
8070e35c | 236 | unsigned long base = card->base; |
1da177e4 LT |
237 | |
238 | for (retries = 0; retries < 100; retries++) { | |
239 | spin_lock_irqsave(&card->card_lock, card->flags); | |
240 | if (inw(base + 0xe) & 0x1) { | |
d8d16e47 | 241 | return 1; |
1da177e4 LT |
242 | } else { |
243 | spin_unlock_irqrestore(&card->card_lock, card->flags); | |
244 | udelay(1000); /* 1ms */ | |
245 | } | |
246 | } | |
a547dfe9 JS |
247 | printk(KERN_WARNING "ISICOM: Failed to lock Card (0x%lx)\n", |
248 | card->base); | |
249 | ||
0418726b | 250 | return 0; /* Failed to acquire the card! */ |
1da177e4 LT |
251 | } |
252 | ||
253 | static int lock_card_at_interrupt(struct isi_board *card) | |
254 | { | |
255 | unsigned char retries; | |
8070e35c | 256 | unsigned long base = card->base; |
1da177e4 LT |
257 | |
258 | for (retries = 0; retries < 200; retries++) { | |
259 | spin_lock_irqsave(&card->card_lock, card->flags); | |
260 | ||
261 | if (inw(base + 0xe) & 0x1) | |
d8d16e47 | 262 | return 1; |
1da177e4 LT |
263 | else |
264 | spin_unlock_irqrestore(&card->card_lock, card->flags); | |
265 | } | |
266 | /* Failing in interrupt is an acceptable event */ | |
0418726b | 267 | return 0; /* Failed to acquire the card! */ |
1da177e4 LT |
268 | } |
269 | ||
270 | static void unlock_card(struct isi_board *card) | |
271 | { | |
272 | spin_unlock_irqrestore(&card->card_lock, card->flags); | |
273 | } | |
274 | ||
275 | /* | |
276 | * ISI Card specific ops ... | |
277 | */ | |
d8d16e47 JS |
278 | |
279 | static void raise_dtr(struct isi_port *port) | |
1da177e4 | 280 | { |
d8d16e47 | 281 | struct isi_board *card = port->card; |
8070e35c JS |
282 | unsigned long base = card->base; |
283 | u16 channel = port->channel; | |
1da177e4 LT |
284 | |
285 | if (!lock_card(card)) | |
286 | return; | |
287 | ||
d8d16e47 | 288 | outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
1da177e4 LT |
289 | outw(0x0504, base); |
290 | InterruptTheCard(base); | |
291 | port->status |= ISI_DTR; | |
292 | unlock_card(card); | |
293 | } | |
294 | ||
d8d16e47 JS |
295 | static inline void drop_dtr(struct isi_port *port) |
296 | { | |
297 | struct isi_board *card = port->card; | |
8070e35c JS |
298 | unsigned long base = card->base; |
299 | u16 channel = port->channel; | |
1da177e4 LT |
300 | |
301 | if (!lock_card(card)) | |
302 | return; | |
303 | ||
d8d16e47 | 304 | outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
1da177e4 | 305 | outw(0x0404, base); |
d8d16e47 | 306 | InterruptTheCard(base); |
1da177e4 LT |
307 | port->status &= ~ISI_DTR; |
308 | unlock_card(card); | |
309 | } | |
310 | ||
d8d16e47 | 311 | static inline void raise_rts(struct isi_port *port) |
1da177e4 | 312 | { |
d8d16e47 | 313 | struct isi_board *card = port->card; |
8070e35c JS |
314 | unsigned long base = card->base; |
315 | u16 channel = port->channel; | |
1da177e4 LT |
316 | |
317 | if (!lock_card(card)) | |
318 | return; | |
319 | ||
d8d16e47 | 320 | outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
1da177e4 | 321 | outw(0x0a04, base); |
d8d16e47 | 322 | InterruptTheCard(base); |
1da177e4 LT |
323 | port->status |= ISI_RTS; |
324 | unlock_card(card); | |
325 | } | |
d8d16e47 | 326 | static inline void drop_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 LT |
331 | |
332 | if (!lock_card(card)) | |
333 | return; | |
334 | ||
d8d16e47 | 335 | outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
1da177e4 | 336 | outw(0x0804, base); |
d8d16e47 | 337 | InterruptTheCard(base); |
1da177e4 LT |
338 | port->status &= ~ISI_RTS; |
339 | unlock_card(card); | |
340 | } | |
341 | ||
d8d16e47 | 342 | static inline void raise_dtr_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 LT |
347 | |
348 | if (!lock_card(card)) | |
349 | return; | |
350 | ||
d8d16e47 | 351 | outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
1da177e4 LT |
352 | outw(0x0f04, base); |
353 | InterruptTheCard(base); | |
354 | port->status |= (ISI_DTR | ISI_RTS); | |
355 | unlock_card(card); | |
356 | } | |
357 | ||
d8d16e47 | 358 | static void drop_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 | 368 | outw(0x0c04, base); |
d8d16e47 | 369 | InterruptTheCard(base); |
1da177e4 LT |
370 | port->status &= ~(ISI_RTS | ISI_DTR); |
371 | unlock_card(card); | |
372 | } | |
373 | ||
d8d16e47 | 374 | static inline void kill_queue(struct isi_port *port, short queue) |
1da177e4 | 375 | { |
d8d16e47 | 376 | struct isi_board *card = port->card; |
8070e35c JS |
377 | unsigned long base = card->base; |
378 | u16 channel = port->channel; | |
1da177e4 LT |
379 | |
380 | if (!lock_card(card)) | |
381 | return; | |
382 | ||
d8d16e47 | 383 | outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
1da177e4 | 384 | outw((queue << 8) | 0x06, base); |
d8d16e47 | 385 | InterruptTheCard(base); |
1da177e4 LT |
386 | unlock_card(card); |
387 | } | |
388 | ||
1da177e4 LT |
389 | /* |
390 | * ISICOM Driver specific routines ... | |
391 | * | |
392 | */ | |
d8d16e47 | 393 | |
aaa246ea JS |
394 | static inline int __isicom_paranoia_check(struct isi_port const *port, |
395 | char *name, const char *routine) | |
1da177e4 | 396 | { |
1da177e4 | 397 | if (!port) { |
aaa246ea JS |
398 | printk(KERN_WARNING "ISICOM: Warning: bad isicom magic for " |
399 | "dev %s in %s.\n", name, routine); | |
1da177e4 LT |
400 | return 1; |
401 | } | |
402 | if (port->magic != ISICOM_MAGIC) { | |
aaa246ea JS |
403 | printk(KERN_WARNING "ISICOM: Warning: NULL isicom port for " |
404 | "dev %s in %s.\n", name, routine); | |
1da177e4 | 405 | return 1; |
d8d16e47 | 406 | } |
aaa246ea | 407 | |
1da177e4 LT |
408 | return 0; |
409 | } | |
d8d16e47 | 410 | |
1da177e4 | 411 | /* |
d8d16e47 | 412 | * Transmitter. |
1da177e4 LT |
413 | * |
414 | * We shovel data into the card buffers on a regular basis. The card | |
415 | * will do the rest of the work for us. | |
416 | */ | |
417 | ||
418 | static void isicom_tx(unsigned long _data) | |
419 | { | |
420 | short count = (BOARD_COUNT-1), card, base; | |
421 | short txcount, wrd, residue, word_count, cnt; | |
d8d16e47 JS |
422 | struct isi_port *port; |
423 | struct tty_struct *tty; | |
424 | ||
1da177e4 LT |
425 | /* find next active board */ |
426 | card = (prev_card + 1) & 0x0003; | |
427 | while(count-- > 0) { | |
d8d16e47 | 428 | if (isi_card[card].status & BOARD_ACTIVE) |
1da177e4 | 429 | break; |
d8d16e47 | 430 | card = (card + 1) & 0x0003; |
1da177e4 LT |
431 | } |
432 | if (!(isi_card[card].status & BOARD_ACTIVE)) | |
433 | goto sched_again; | |
d8d16e47 | 434 | |
1da177e4 | 435 | prev_card = card; |
d8d16e47 | 436 | |
1da177e4 LT |
437 | count = isi_card[card].port_count; |
438 | port = isi_card[card].ports; | |
439 | base = isi_card[card].base; | |
440 | for (;count > 0;count--, port++) { | |
441 | if (!lock_card_at_interrupt(&isi_card[card])) | |
442 | continue; | |
443 | /* port not active or tx disabled to force flow control */ | |
444 | if (!(port->flags & ASYNC_INITIALIZED) || | |
d8d16e47 | 445 | !(port->status & ISI_TXOK)) |
1da177e4 LT |
446 | unlock_card(&isi_card[card]); |
447 | continue; | |
d8d16e47 | 448 | |
1da177e4 | 449 | tty = port->tty; |
d8d16e47 JS |
450 | |
451 | ||
452 | if (tty == NULL) { | |
1da177e4 LT |
453 | unlock_card(&isi_card[card]); |
454 | continue; | |
455 | } | |
d8d16e47 | 456 | |
1da177e4 LT |
457 | txcount = min_t(short, TX_SIZE, port->xmit_cnt); |
458 | if (txcount <= 0 || tty->stopped || tty->hw_stopped) { | |
459 | unlock_card(&isi_card[card]); | |
460 | continue; | |
461 | } | |
462 | if (!(inw(base + 0x02) & (1 << port->channel))) { | |
463 | unlock_card(&isi_card[card]); | |
d8d16e47 | 464 | continue; |
1da177e4 | 465 | } |
aaa246ea JS |
466 | pr_dbg("txing %d bytes, port%d.\n", txcount, |
467 | port->channel + 1); | |
468 | outw((port->channel << isi_card[card].shift_count) | txcount, | |
469 | base); | |
1da177e4 | 470 | residue = NO; |
d8d16e47 | 471 | wrd = 0; |
1da177e4 | 472 | while (1) { |
a547dfe9 JS |
473 | cnt = min_t(int, txcount, (SERIAL_XMIT_SIZE |
474 | - port->xmit_tail)); | |
1da177e4 LT |
475 | if (residue == YES) { |
476 | residue = NO; | |
477 | if (cnt > 0) { | |
a547dfe9 JS |
478 | wrd |= (port->xmit_buf[port->xmit_tail] |
479 | << 8); | |
480 | port->xmit_tail = (port->xmit_tail + 1) | |
481 | & (SERIAL_XMIT_SIZE - 1); | |
1da177e4 LT |
482 | port->xmit_cnt--; |
483 | txcount--; | |
484 | cnt--; | |
d8d16e47 | 485 | outw(wrd, base); |
a547dfe9 | 486 | } else { |
1da177e4 LT |
487 | outw(wrd, base); |
488 | break; | |
489 | } | |
d8d16e47 | 490 | } |
1da177e4 LT |
491 | if (cnt <= 0) break; |
492 | word_count = cnt >> 1; | |
a547dfe9 JS |
493 | outsw(base, port->xmit_buf+port->xmit_tail,word_count); |
494 | port->xmit_tail = (port->xmit_tail | |
495 | + (word_count << 1)) & (SERIAL_XMIT_SIZE - 1); | |
1da177e4 LT |
496 | txcount -= (word_count << 1); |
497 | port->xmit_cnt -= (word_count << 1); | |
498 | if (cnt & 0x0001) { | |
499 | residue = YES; | |
500 | wrd = port->xmit_buf[port->xmit_tail]; | |
a547dfe9 JS |
501 | port->xmit_tail = (port->xmit_tail + 1) |
502 | & (SERIAL_XMIT_SIZE - 1); | |
1da177e4 LT |
503 | port->xmit_cnt--; |
504 | txcount--; | |
505 | } | |
506 | } | |
507 | ||
508 | InterruptTheCard(base); | |
509 | if (port->xmit_cnt <= 0) | |
510 | port->status &= ~ISI_TXOK; | |
511 | if (port->xmit_cnt <= WAKEUP_CHARS) | |
512 | schedule_work(&port->bh_tqueue); | |
513 | unlock_card(&isi_card[card]); | |
d8d16e47 | 514 | } |
1da177e4 | 515 | |
d8d16e47 JS |
516 | /* schedule another tx for hopefully in about 10ms */ |
517 | sched_again: | |
aaa246ea | 518 | if (!re_schedule) { |
906cdecb | 519 | complete(&isi_timerdone); |
aaa246ea JS |
520 | return; |
521 | } | |
522 | ||
34b55b86 | 523 | mod_timer(&tx, jiffies + msecs_to_jiffies(10)); |
d8d16e47 JS |
524 | } |
525 | ||
1da177e4 LT |
526 | /* Interrupt handlers */ |
527 | ||
d8d16e47 | 528 | |
c4028958 | 529 | static void isicom_bottomhalf(struct work_struct *work) |
1da177e4 | 530 | { |
c4028958 | 531 | struct isi_port *port = container_of(work, struct isi_port, bh_tqueue); |
d8d16e47 JS |
532 | struct tty_struct *tty = port->tty; |
533 | ||
1da177e4 LT |
534 | if (!tty) |
535 | return; | |
536 | ||
d8d16e47 | 537 | tty_wakeup(tty); |
1da177e4 | 538 | wake_up_interruptible(&tty->write_wait); |
d8d16e47 JS |
539 | } |
540 | ||
1da177e4 | 541 | /* |
d8d16e47 | 542 | * Main interrupt handler routine |
1da177e4 | 543 | */ |
d8d16e47 | 544 | |
7d12e780 | 545 | static irqreturn_t isicom_interrupt(int irq, void *dev_id) |
1da177e4 | 546 | { |
8070e35c | 547 | struct isi_board *card = dev_id; |
d8d16e47 JS |
548 | struct isi_port *port; |
549 | struct tty_struct *tty; | |
8070e35c JS |
550 | unsigned long base; |
551 | u16 header, word_count, count, channel; | |
1da177e4 | 552 | short byte_count; |
33f0f88f | 553 | unsigned char *rp; |
d8d16e47 | 554 | |
1da177e4 LT |
555 | if (!card || !(card->status & FIRMWARE_LOADED)) |
556 | return IRQ_NONE; | |
d8d16e47 | 557 | |
1da177e4 LT |
558 | base = card->base; |
559 | spin_lock(&card->card_lock); | |
d8d16e47 | 560 | |
18234f88 JS |
561 | /* |
562 | * disable any interrupts from the PCI card and lower the | |
563 | * interrupt line | |
564 | */ | |
565 | outw(0x8000, base+0x04); | |
566 | ClearInterrupt(base); | |
d8d16e47 | 567 | |
1da177e4 LT |
568 | inw(base); /* get the dummy word out */ |
569 | header = inw(base); | |
570 | channel = (header & 0x7800) >> card->shift_count; | |
571 | byte_count = header & 0xff; | |
572 | ||
573 | if (channel + 1 > card->port_count) { | |
a547dfe9 JS |
574 | printk(KERN_WARNING "ISICOM: isicom_interrupt(0x%lx): " |
575 | "%d(channel) > port_count.\n", base, channel+1); | |
18234f88 | 576 | outw(0x0000, base+0x04); /* enable interrupts */ |
1da177e4 | 577 | spin_unlock(&card->card_lock); |
d8d16e47 | 578 | return IRQ_HANDLED; |
1da177e4 LT |
579 | } |
580 | port = card->ports + channel; | |
581 | if (!(port->flags & ASYNC_INITIALIZED)) { | |
18234f88 | 582 | outw(0x0000, base+0x04); /* enable interrupts */ |
1da177e4 | 583 | return IRQ_HANDLED; |
d8d16e47 JS |
584 | } |
585 | ||
1da177e4 LT |
586 | tty = port->tty; |
587 | if (tty == NULL) { | |
588 | word_count = byte_count >> 1; | |
589 | while(byte_count > 1) { | |
590 | inw(base); | |
591 | byte_count -= 2; | |
592 | } | |
593 | if (byte_count & 0x01) | |
594 | inw(base); | |
18234f88 | 595 | outw(0x0000, base+0x04); /* enable interrupts */ |
1da177e4 LT |
596 | spin_unlock(&card->card_lock); |
597 | return IRQ_HANDLED; | |
598 | } | |
d8d16e47 | 599 | |
1da177e4 LT |
600 | if (header & 0x8000) { /* Status Packet */ |
601 | header = inw(base); | |
602 | switch(header & 0xff) { | |
d8d16e47 | 603 | case 0: /* Change in EIA signals */ |
d8d16e47 JS |
604 | if (port->flags & ASYNC_CHECK_CD) { |
605 | if (port->status & ISI_DCD) { | |
606 | if (!(header & ISI_DCD)) { | |
607 | /* Carrier has been lost */ | |
a547dfe9 JS |
608 | pr_dbg("interrupt: DCD->low.\n" |
609 | ); | |
d8d16e47 JS |
610 | port->status &= ~ISI_DCD; |
611 | schedule_work(&port->hangup_tq); | |
1da177e4 | 612 | } |
a547dfe9 JS |
613 | } else if (header & ISI_DCD) { |
614 | /* Carrier has been detected */ | |
615 | pr_dbg("interrupt: DCD->high.\n"); | |
616 | port->status |= ISI_DCD; | |
617 | wake_up_interruptible(&port->open_wait); | |
1da177e4 | 618 | } |
a547dfe9 | 619 | } else { |
d8d16e47 JS |
620 | if (header & ISI_DCD) |
621 | port->status |= ISI_DCD; | |
622 | else | |
623 | port->status &= ~ISI_DCD; | |
624 | } | |
625 | ||
626 | if (port->flags & ASYNC_CTS_FLOW) { | |
627 | if (port->tty->hw_stopped) { | |
628 | if (header & ISI_CTS) { | |
629 | port->tty->hw_stopped = 0; | |
630 | /* start tx ing */ | |
a547dfe9 JS |
631 | port->status |= (ISI_TXOK |
632 | | ISI_CTS); | |
d8d16e47 | 633 | schedule_work(&port->bh_tqueue); |
1da177e4 | 634 | } |
a547dfe9 JS |
635 | } else if (!(header & ISI_CTS)) { |
636 | port->tty->hw_stopped = 1; | |
637 | /* stop tx ing */ | |
638 | port->status &= ~(ISI_TXOK | ISI_CTS); | |
1da177e4 | 639 | } |
a547dfe9 | 640 | } else { |
d8d16e47 JS |
641 | if (header & ISI_CTS) |
642 | port->status |= ISI_CTS; | |
1da177e4 | 643 | else |
d8d16e47 JS |
644 | port->status &= ~ISI_CTS; |
645 | } | |
646 | ||
647 | if (header & ISI_DSR) | |
648 | port->status |= ISI_DSR; | |
649 | else | |
650 | port->status &= ~ISI_DSR; | |
651 | ||
652 | if (header & ISI_RI) | |
653 | port->status |= ISI_RI; | |
654 | else | |
655 | port->status &= ~ISI_RI; | |
656 | ||
657 | break; | |
658 | ||
a547dfe9 | 659 | case 1: /* Received Break !!! */ |
d8d16e47 JS |
660 | tty_insert_flip_char(tty, 0, TTY_BREAK); |
661 | if (port->flags & ASYNC_SAK) | |
662 | do_SAK(tty); | |
663 | tty_flip_buffer_push(tty); | |
664 | break; | |
665 | ||
666 | case 2: /* Statistics */ | |
aaa246ea | 667 | pr_dbg("isicom_interrupt: stats!!!.\n"); |
d8d16e47 JS |
668 | break; |
669 | ||
670 | default: | |
aaa246ea | 671 | pr_dbg("Intr: Unknown code in status packet.\n"); |
d8d16e47 JS |
672 | break; |
673 | } | |
a547dfe9 | 674 | } else { /* Data Packet */ |
33f0f88f AC |
675 | |
676 | count = tty_prepare_flip_string(tty, &rp, byte_count & ~1); | |
aaa246ea | 677 | pr_dbg("Intr: Can rx %d of %d bytes.\n", count, byte_count); |
1da177e4 | 678 | word_count = count >> 1; |
33f0f88f | 679 | insw(base, rp, word_count); |
1da177e4 LT |
680 | byte_count -= (word_count << 1); |
681 | if (count & 0x0001) { | |
a547dfe9 JS |
682 | tty_insert_flip_char(tty, inw(base) & 0xff, |
683 | TTY_NORMAL); | |
1da177e4 | 684 | byte_count -= 2; |
d8d16e47 | 685 | } |
1da177e4 | 686 | if (byte_count > 0) { |
aaa246ea JS |
687 | pr_dbg("Intr(0x%lx:%d): Flip buffer overflow! dropping " |
688 | "bytes...\n", base, channel + 1); | |
1da177e4 LT |
689 | while(byte_count > 0) { /* drain out unread xtra data */ |
690 | inw(base); | |
691 | byte_count -= 2; | |
692 | } | |
693 | } | |
33f0f88f | 694 | tty_flip_buffer_push(tty); |
1da177e4 | 695 | } |
18234f88 | 696 | outw(0x0000, base+0x04); /* enable interrupts */ |
a547dfe9 | 697 | |
1da177e4 | 698 | return IRQ_HANDLED; |
d8d16e47 | 699 | } |
1da177e4 | 700 | |
d8d16e47 | 701 | static void isicom_config_port(struct isi_port *port) |
1da177e4 | 702 | { |
d8d16e47 JS |
703 | struct isi_board *card = port->card; |
704 | struct tty_struct *tty; | |
1da177e4 | 705 | unsigned long baud; |
8070e35c JS |
706 | unsigned long base = card->base; |
707 | u16 channel_setup, channel = port->channel, | |
708 | shift_count = card->shift_count; | |
1da177e4 | 709 | unsigned char flow_ctrl; |
d8d16e47 | 710 | |
1da177e4 LT |
711 | if (!(tty = port->tty) || !tty->termios) |
712 | return; | |
713 | baud = C_BAUD(tty); | |
714 | if (baud & CBAUDEX) { | |
715 | baud &= ~CBAUDEX; | |
d8d16e47 | 716 | |
1da177e4 LT |
717 | /* if CBAUDEX bit is on and the baud is set to either 50 or 75 |
718 | * then the card is programmed for 57.6Kbps or 115Kbps | |
719 | * respectively. | |
d8d16e47 JS |
720 | */ |
721 | ||
1da177e4 LT |
722 | if (baud < 1 || baud > 2) |
723 | port->tty->termios->c_cflag &= ~CBAUDEX; | |
724 | else | |
725 | baud += 15; | |
d8d16e47 | 726 | } |
1da177e4 | 727 | if (baud == 15) { |
d8d16e47 JS |
728 | |
729 | /* the ASYNC_SPD_HI and ASYNC_SPD_VHI options are set | |
1da177e4 LT |
730 | * by the set_serial_info ioctl ... this is done by |
731 | * the 'setserial' utility. | |
d8d16e47 JS |
732 | */ |
733 | ||
1da177e4 | 734 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) |
d8d16e47 | 735 | baud++; /* 57.6 Kbps */ |
1da177e4 | 736 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) |
d8d16e47 | 737 | baud +=2; /* 115 Kbps */ |
1da177e4 LT |
738 | } |
739 | if (linuxb_to_isib[baud] == -1) { | |
740 | /* hang up */ | |
d8d16e47 JS |
741 | drop_dtr(port); |
742 | return; | |
743 | } | |
744 | else | |
1da177e4 | 745 | raise_dtr(port); |
d8d16e47 | 746 | |
1da177e4 LT |
747 | if (lock_card(card)) { |
748 | outw(0x8000 | (channel << shift_count) |0x03, base); | |
749 | outw(linuxb_to_isib[baud] << 8 | 0x03, base); | |
750 | channel_setup = 0; | |
751 | switch(C_CSIZE(tty)) { | |
d8d16e47 JS |
752 | case CS5: |
753 | channel_setup |= ISICOM_CS5; | |
754 | break; | |
755 | case CS6: | |
756 | channel_setup |= ISICOM_CS6; | |
757 | break; | |
758 | case CS7: | |
759 | channel_setup |= ISICOM_CS7; | |
760 | break; | |
761 | case CS8: | |
762 | channel_setup |= ISICOM_CS8; | |
763 | break; | |
1da177e4 | 764 | } |
d8d16e47 | 765 | |
1da177e4 LT |
766 | if (C_CSTOPB(tty)) |
767 | channel_setup |= ISICOM_2SB; | |
768 | if (C_PARENB(tty)) { | |
769 | channel_setup |= ISICOM_EVPAR; | |
770 | if (C_PARODD(tty)) | |
d8d16e47 | 771 | channel_setup |= ISICOM_ODPAR; |
1da177e4 | 772 | } |
d8d16e47 | 773 | outw(channel_setup, base); |
1da177e4 | 774 | InterruptTheCard(base); |
d8d16e47 JS |
775 | unlock_card(card); |
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 | ||
1da177e4 LT |
794 | if (lock_card(card)) { |
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); | |
799 | unlock_card(card); | |
800 | } | |
d8d16e47 | 801 | |
1da177e4 LT |
802 | /* rx enabled -> enable port for rx on the card */ |
803 | if (C_CREAD(tty)) { | |
804 | card->port_status |= (1 << channel); | |
805 | outw(card->port_status, base + 0x02); | |
806 | } | |
807 | } | |
1da177e4 | 808 | |
d8d16e47 JS |
809 | /* open et all */ |
810 | ||
811 | static inline void isicom_setup_board(struct isi_board *bp) | |
1da177e4 LT |
812 | { |
813 | int channel; | |
d8d16e47 | 814 | struct isi_port *port; |
1da177e4 | 815 | unsigned long flags; |
d8d16e47 | 816 | |
1da177e4 LT |
817 | spin_lock_irqsave(&bp->card_lock, flags); |
818 | if (bp->status & BOARD_ACTIVE) { | |
819 | spin_unlock_irqrestore(&bp->card_lock, flags); | |
820 | return; | |
821 | } | |
822 | port = bp->ports; | |
823 | bp->status |= BOARD_ACTIVE; | |
824 | spin_unlock_irqrestore(&bp->card_lock, flags); | |
d8d16e47 | 825 | for (channel = 0; channel < bp->port_count; channel++, port++) |
1da177e4 LT |
826 | drop_dtr_rts(port); |
827 | return; | |
828 | } | |
d8d16e47 JS |
829 | |
830 | static int isicom_setup_port(struct isi_port *port) | |
1da177e4 | 831 | { |
d8d16e47 | 832 | struct isi_board *card = port->card; |
1da177e4 | 833 | unsigned long flags; |
d8d16e47 | 834 | |
1da177e4 LT |
835 | if (port->flags & ASYNC_INITIALIZED) { |
836 | return 0; | |
837 | } | |
838 | if (!port->xmit_buf) { | |
839 | unsigned long page; | |
d8d16e47 | 840 | |
1da177e4 LT |
841 | if (!(page = get_zeroed_page(GFP_KERNEL))) |
842 | return -ENOMEM; | |
d8d16e47 | 843 | |
1da177e4 LT |
844 | if (port->xmit_buf) { |
845 | free_page(page); | |
846 | return -ERESTARTSYS; | |
847 | } | |
d8d16e47 JS |
848 | port->xmit_buf = (unsigned char *) page; |
849 | } | |
1da177e4 LT |
850 | |
851 | spin_lock_irqsave(&card->card_lock, flags); | |
852 | if (port->tty) | |
853 | clear_bit(TTY_IO_ERROR, &port->tty->flags); | |
854 | if (port->count == 1) | |
855 | card->count++; | |
d8d16e47 | 856 | |
1da177e4 | 857 | port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; |
d8d16e47 | 858 | |
1da177e4 LT |
859 | /* discard any residual data */ |
860 | kill_queue(port, ISICOM_KILLTX | ISICOM_KILLRX); | |
d8d16e47 | 861 | |
1da177e4 LT |
862 | isicom_config_port(port); |
863 | port->flags |= ASYNC_INITIALIZED; | |
864 | spin_unlock_irqrestore(&card->card_lock, flags); | |
d8d16e47 JS |
865 | |
866 | return 0; | |
867 | } | |
868 | ||
a547dfe9 JS |
869 | static int block_til_ready(struct tty_struct *tty, struct file *filp, |
870 | struct isi_port *port) | |
1da177e4 | 871 | { |
d8d16e47 | 872 | struct isi_board *card = port->card; |
1da177e4 LT |
873 | int do_clocal = 0, retval; |
874 | unsigned long flags; | |
875 | DECLARE_WAITQUEUE(wait, current); | |
876 | ||
877 | /* block if port is in the process of being closed */ | |
878 | ||
879 | if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) { | |
aaa246ea | 880 | pr_dbg("block_til_ready: close in progress.\n"); |
1da177e4 LT |
881 | interruptible_sleep_on(&port->close_wait); |
882 | if (port->flags & ASYNC_HUP_NOTIFY) | |
883 | return -EAGAIN; | |
884 | else | |
885 | return -ERESTARTSYS; | |
886 | } | |
d8d16e47 | 887 | |
1da177e4 | 888 | /* if non-blocking mode is set ... */ |
d8d16e47 | 889 | |
a547dfe9 JS |
890 | if ((filp->f_flags & O_NONBLOCK) || |
891 | (tty->flags & (1 << TTY_IO_ERROR))) { | |
aaa246ea | 892 | pr_dbg("block_til_ready: non-block mode.\n"); |
1da177e4 | 893 | port->flags |= ASYNC_NORMAL_ACTIVE; |
d8d16e47 JS |
894 | return 0; |
895 | } | |
896 | ||
1da177e4 LT |
897 | if (C_CLOCAL(tty)) |
898 | do_clocal = 1; | |
d8d16e47 JS |
899 | |
900 | /* block waiting for DCD to be asserted, and while | |
1da177e4 LT |
901 | callout dev is busy */ |
902 | retval = 0; | |
903 | add_wait_queue(&port->open_wait, &wait); | |
904 | ||
905 | spin_lock_irqsave(&card->card_lock, flags); | |
906 | if (!tty_hung_up_p(filp)) | |
907 | port->count--; | |
908 | port->blocked_open++; | |
909 | spin_unlock_irqrestore(&card->card_lock, flags); | |
d8d16e47 | 910 | |
1da177e4 LT |
911 | while (1) { |
912 | raise_dtr_rts(port); | |
913 | ||
914 | set_current_state(TASK_INTERRUPTIBLE); | |
d8d16e47 | 915 | if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) { |
1da177e4 LT |
916 | if (port->flags & ASYNC_HUP_NOTIFY) |
917 | retval = -EAGAIN; | |
918 | else | |
919 | retval = -ERESTARTSYS; | |
920 | break; | |
d8d16e47 | 921 | } |
1da177e4 | 922 | if (!(port->flags & ASYNC_CLOSING) && |
d8d16e47 | 923 | (do_clocal || (port->status & ISI_DCD))) { |
1da177e4 | 924 | break; |
d8d16e47 | 925 | } |
1da177e4 LT |
926 | if (signal_pending(current)) { |
927 | retval = -ERESTARTSYS; | |
928 | break; | |
929 | } | |
d8d16e47 | 930 | schedule(); |
1da177e4 LT |
931 | } |
932 | set_current_state(TASK_RUNNING); | |
933 | remove_wait_queue(&port->open_wait, &wait); | |
934 | spin_lock_irqsave(&card->card_lock, flags); | |
935 | if (!tty_hung_up_p(filp)) | |
936 | port->count++; | |
937 | port->blocked_open--; | |
938 | spin_unlock_irqrestore(&card->card_lock, flags); | |
939 | if (retval) | |
940 | return retval; | |
941 | port->flags |= ASYNC_NORMAL_ACTIVE; | |
942 | return 0; | |
943 | } | |
d8d16e47 JS |
944 | |
945 | static int isicom_open(struct tty_struct *tty, struct file *filp) | |
1da177e4 | 946 | { |
d8d16e47 JS |
947 | struct isi_port *port; |
948 | struct isi_board *card; | |
17c4edf0 JS |
949 | unsigned int board; |
950 | int error, line; | |
1da177e4 LT |
951 | |
952 | line = tty->index; | |
953 | if (line < 0 || line > PORT_COUNT-1) | |
954 | return -ENODEV; | |
955 | board = BOARD(line); | |
956 | card = &isi_card[board]; | |
d8d16e47 | 957 | |
1da177e4 LT |
958 | if (!(card->status & FIRMWARE_LOADED)) |
959 | return -ENODEV; | |
d8d16e47 | 960 | |
1da177e4 LT |
961 | /* open on a port greater than the port count for the card !!! */ |
962 | if (line > ((board * 16) + card->port_count - 1)) | |
963 | return -ENODEV; | |
964 | ||
d8d16e47 | 965 | port = &isi_ports[line]; |
1da177e4 LT |
966 | if (isicom_paranoia_check(port, tty->name, "isicom_open")) |
967 | return -ENODEV; | |
d8d16e47 JS |
968 | |
969 | isicom_setup_board(card); | |
970 | ||
1da177e4 LT |
971 | port->count++; |
972 | tty->driver_data = port; | |
973 | port->tty = tty; | |
974 | if ((error = isicom_setup_port(port))!=0) | |
975 | return error; | |
976 | if ((error = block_til_ready(tty, filp, port))!=0) | |
977 | return error; | |
978 | ||
d8d16e47 | 979 | return 0; |
1da177e4 | 980 | } |
d8d16e47 | 981 | |
1da177e4 LT |
982 | /* close et all */ |
983 | ||
d8d16e47 | 984 | static inline void isicom_shutdown_board(struct isi_board *bp) |
1da177e4 LT |
985 | { |
986 | unsigned long flags; | |
987 | ||
988 | spin_lock_irqsave(&bp->card_lock, flags); | |
989 | if (bp->status & BOARD_ACTIVE) { | |
990 | bp->status &= ~BOARD_ACTIVE; | |
991 | } | |
992 | spin_unlock_irqrestore(&bp->card_lock, flags); | |
993 | } | |
994 | ||
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; | |
1da177e4 | 999 | unsigned long flags; |
d8d16e47 | 1000 | |
1da177e4 LT |
1001 | tty = port->tty; |
1002 | ||
d8d16e47 | 1003 | spin_lock_irqsave(&card->card_lock, flags); |
1da177e4 LT |
1004 | if (!(port->flags & ASYNC_INITIALIZED)) { |
1005 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1006 | return; | |
1007 | } | |
1008 | if (port->xmit_buf) { | |
1009 | free_page((unsigned long) port->xmit_buf); | |
1010 | port->xmit_buf = NULL; | |
d8d16e47 | 1011 | } |
1da177e4 LT |
1012 | port->flags &= ~ASYNC_INITIALIZED; |
1013 | /* 3rd October 2000 : Vinayak P Risbud */ | |
1014 | port->tty = NULL; | |
1015 | spin_unlock_irqrestore(&card->card_lock, flags); | |
d8d16e47 | 1016 | |
1da177e4 LT |
1017 | /*Fix done by Anil .S on 30-04-2001 |
1018 | remote login through isi port has dtr toggle problem | |
1019 | due to which the carrier drops before the password prompt | |
d8d16e47 | 1020 | appears on the remote end. Now we drop the dtr only if the |
1da177e4 | 1021 | HUPCL(Hangup on close) flag is set for the tty*/ |
d8d16e47 JS |
1022 | |
1023 | if (C_HUPCL(tty)) | |
1da177e4 LT |
1024 | /* drop dtr on this port */ |
1025 | drop_dtr(port); | |
d8d16e47 JS |
1026 | |
1027 | /* any other port uninits */ | |
1da177e4 LT |
1028 | if (tty) |
1029 | set_bit(TTY_IO_ERROR, &tty->flags); | |
d8d16e47 | 1030 | |
1da177e4 | 1031 | if (--card->count < 0) { |
aaa246ea | 1032 | pr_dbg("isicom_shutdown_port: bad board(0x%lx) count %d.\n", |
1da177e4 | 1033 | card->base, card->count); |
d8d16e47 | 1034 | card->count = 0; |
1da177e4 | 1035 | } |
d8d16e47 | 1036 | |
a547dfe9 | 1037 | /* last port was closed, shutdown that boad too */ |
d8d16e47 | 1038 | if (C_HUPCL(tty)) { |
1da177e4 LT |
1039 | if (!card->count) |
1040 | isicom_shutdown_board(card); | |
1041 | } | |
1042 | } | |
1043 | ||
d8d16e47 | 1044 | static void isicom_close(struct tty_struct *tty, struct file *filp) |
1da177e4 | 1045 | { |
8070e35c | 1046 | struct isi_port *port = tty->driver_data; |
c387fd85 | 1047 | struct isi_board *card; |
1da177e4 | 1048 | unsigned long flags; |
d8d16e47 | 1049 | |
1da177e4 LT |
1050 | if (!port) |
1051 | return; | |
c387fd85 | 1052 | card = port->card; |
1da177e4 LT |
1053 | if (isicom_paranoia_check(port, tty->name, "isicom_close")) |
1054 | return; | |
d8d16e47 | 1055 | |
aaa246ea | 1056 | pr_dbg("Close start!!!.\n"); |
d8d16e47 | 1057 | |
1da177e4 LT |
1058 | spin_lock_irqsave(&card->card_lock, flags); |
1059 | if (tty_hung_up_p(filp)) { | |
1060 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1061 | return; | |
1062 | } | |
d8d16e47 | 1063 | |
1da177e4 | 1064 | if (tty->count == 1 && port->count != 1) { |
a547dfe9 JS |
1065 | printk(KERN_WARNING "ISICOM:(0x%lx) isicom_close: bad port " |
1066 | "count tty->count = 1 port count = %d.\n", | |
1da177e4 LT |
1067 | card->base, port->count); |
1068 | port->count = 1; | |
1069 | } | |
1070 | if (--port->count < 0) { | |
a547dfe9 JS |
1071 | printk(KERN_WARNING "ISICOM:(0x%lx) isicom_close: bad port " |
1072 | "count for channel%d = %d", card->base, port->channel, | |
1da177e4 | 1073 | port->count); |
d8d16e47 | 1074 | port->count = 0; |
1da177e4 | 1075 | } |
d8d16e47 | 1076 | |
1da177e4 LT |
1077 | if (port->count) { |
1078 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1079 | return; | |
d8d16e47 | 1080 | } |
1da177e4 LT |
1081 | port->flags |= ASYNC_CLOSING; |
1082 | tty->closing = 1; | |
1083 | spin_unlock_irqrestore(&card->card_lock, flags); | |
d8d16e47 | 1084 | |
1da177e4 LT |
1085 | if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE) |
1086 | tty_wait_until_sent(tty, port->closing_wait); | |
d8d16e47 | 1087 | /* indicate to the card that no more data can be received |
1da177e4 LT |
1088 | on this port */ |
1089 | spin_lock_irqsave(&card->card_lock, flags); | |
d8d16e47 | 1090 | if (port->flags & ASYNC_INITIALIZED) { |
1da177e4 LT |
1091 | card->port_status &= ~(1 << port->channel); |
1092 | outw(card->port_status, card->base + 0x02); | |
d8d16e47 | 1093 | } |
1da177e4 LT |
1094 | isicom_shutdown_port(port); |
1095 | spin_unlock_irqrestore(&card->card_lock, flags); | |
d8d16e47 | 1096 | |
1da177e4 LT |
1097 | if (tty->driver->flush_buffer) |
1098 | tty->driver->flush_buffer(tty); | |
1099 | tty_ldisc_flush(tty); | |
1100 | ||
1101 | spin_lock_irqsave(&card->card_lock, flags); | |
1102 | tty->closing = 0; | |
1103 | ||
1104 | if (port->blocked_open) { | |
1105 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1106 | if (port->close_delay) { | |
aaa246ea | 1107 | pr_dbg("scheduling until time out.\n"); |
a547dfe9 JS |
1108 | msleep_interruptible( |
1109 | jiffies_to_msecs(port->close_delay)); | |
1da177e4 LT |
1110 | } |
1111 | spin_lock_irqsave(&card->card_lock, flags); | |
1112 | wake_up_interruptible(&port->open_wait); | |
d8d16e47 | 1113 | } |
1da177e4 LT |
1114 | port->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING); |
1115 | wake_up_interruptible(&port->close_wait); | |
1116 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1117 | } | |
1118 | ||
1119 | /* write et all */ | |
d8d16e47 JS |
1120 | static int isicom_write(struct tty_struct *tty, const unsigned char *buf, |
1121 | int count) | |
1da177e4 | 1122 | { |
8070e35c | 1123 | struct isi_port *port = tty->driver_data; |
d8d16e47 | 1124 | struct isi_board *card = port->card; |
1da177e4 LT |
1125 | unsigned long flags; |
1126 | int cnt, total = 0; | |
1127 | ||
1128 | if (isicom_paranoia_check(port, tty->name, "isicom_write")) | |
1129 | return 0; | |
d8d16e47 | 1130 | |
326f28e9 | 1131 | if (!port->xmit_buf) |
1da177e4 | 1132 | return 0; |
d8d16e47 | 1133 | |
1da177e4 | 1134 | spin_lock_irqsave(&card->card_lock, flags); |
d8d16e47 JS |
1135 | |
1136 | while(1) { | |
a547dfe9 JS |
1137 | cnt = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt |
1138 | - 1, SERIAL_XMIT_SIZE - port->xmit_head)); | |
d8d16e47 | 1139 | if (cnt <= 0) |
1da177e4 | 1140 | break; |
d8d16e47 | 1141 | |
1da177e4 | 1142 | memcpy(port->xmit_buf + port->xmit_head, buf, cnt); |
a547dfe9 JS |
1143 | port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE |
1144 | - 1); | |
1da177e4 LT |
1145 | port->xmit_cnt += cnt; |
1146 | buf += cnt; | |
1147 | count -= cnt; | |
1148 | total += cnt; | |
d8d16e47 | 1149 | } |
1da177e4 LT |
1150 | if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped) |
1151 | port->status |= ISI_TXOK; | |
1152 | spin_unlock_irqrestore(&card->card_lock, flags); | |
d8d16e47 | 1153 | return total; |
1da177e4 LT |
1154 | } |
1155 | ||
1156 | /* put_char et all */ | |
d8d16e47 | 1157 | static void isicom_put_char(struct tty_struct *tty, unsigned char ch) |
1da177e4 | 1158 | { |
8070e35c | 1159 | struct isi_port *port = tty->driver_data; |
d8d16e47 | 1160 | struct isi_board *card = port->card; |
1da177e4 | 1161 | unsigned long flags; |
d8d16e47 | 1162 | |
1da177e4 LT |
1163 | if (isicom_paranoia_check(port, tty->name, "isicom_put_char")) |
1164 | return; | |
d8d16e47 | 1165 | |
326f28e9 | 1166 | if (!port->xmit_buf) |
1da177e4 LT |
1167 | return; |
1168 | ||
1169 | spin_lock_irqsave(&card->card_lock, flags); | |
1170 | if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) { | |
1171 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1172 | return; | |
1173 | } | |
d8d16e47 | 1174 | |
1da177e4 LT |
1175 | port->xmit_buf[port->xmit_head++] = ch; |
1176 | port->xmit_head &= (SERIAL_XMIT_SIZE - 1); | |
1177 | port->xmit_cnt++; | |
1178 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1179 | } | |
1180 | ||
1181 | /* flush_chars et all */ | |
d8d16e47 | 1182 | static void isicom_flush_chars(struct tty_struct *tty) |
1da177e4 | 1183 | { |
8070e35c | 1184 | struct isi_port *port = tty->driver_data; |
d8d16e47 | 1185 | |
1da177e4 LT |
1186 | if (isicom_paranoia_check(port, tty->name, "isicom_flush_chars")) |
1187 | return; | |
d8d16e47 | 1188 | |
a547dfe9 JS |
1189 | if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped || |
1190 | !port->xmit_buf) | |
1da177e4 | 1191 | return; |
d8d16e47 | 1192 | |
1da177e4 LT |
1193 | /* this tells the transmitter to consider this port for |
1194 | data output to the card ... that's the best we can do. */ | |
d8d16e47 | 1195 | port->status |= ISI_TXOK; |
1da177e4 LT |
1196 | } |
1197 | ||
1198 | /* write_room et all */ | |
d8d16e47 | 1199 | static int isicom_write_room(struct tty_struct *tty) |
1da177e4 | 1200 | { |
8070e35c | 1201 | struct isi_port *port = tty->driver_data; |
1da177e4 LT |
1202 | int free; |
1203 | ||
1204 | if (isicom_paranoia_check(port, tty->name, "isicom_write_room")) | |
1205 | return 0; | |
d8d16e47 | 1206 | |
1da177e4 LT |
1207 | free = SERIAL_XMIT_SIZE - port->xmit_cnt - 1; |
1208 | if (free < 0) | |
1209 | free = 0; | |
1210 | return free; | |
1211 | } | |
1212 | ||
1213 | /* chars_in_buffer et all */ | |
d8d16e47 | 1214 | static int isicom_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 1215 | { |
8070e35c | 1216 | struct isi_port *port = tty->driver_data; |
1da177e4 LT |
1217 | if (isicom_paranoia_check(port, tty->name, "isicom_chars_in_buffer")) |
1218 | return 0; | |
1219 | return port->xmit_cnt; | |
1220 | } | |
1221 | ||
1222 | /* ioctl et all */ | |
a547dfe9 JS |
1223 | static inline void isicom_send_break(struct isi_port *port, |
1224 | unsigned long length) | |
1da177e4 | 1225 | { |
d8d16e47 | 1226 | struct isi_board *card = port->card; |
8070e35c | 1227 | unsigned long base = card->base; |
d8d16e47 JS |
1228 | |
1229 | if (!lock_card(card)) | |
1da177e4 | 1230 | return; |
d8d16e47 | 1231 | |
1da177e4 LT |
1232 | outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base); |
1233 | outw((length & 0xff) << 8 | 0x00, base); | |
1234 | outw((length & 0xff00), base); | |
1235 | InterruptTheCard(base); | |
1236 | ||
1237 | unlock_card(card); | |
1238 | } | |
1239 | ||
1240 | static int isicom_tiocmget(struct tty_struct *tty, struct file *file) | |
1241 | { | |
8070e35c | 1242 | struct isi_port *port = tty->driver_data; |
1da177e4 | 1243 | /* just send the port status */ |
8070e35c | 1244 | u16 status = port->status; |
1da177e4 LT |
1245 | |
1246 | if (isicom_paranoia_check(port, tty->name, "isicom_ioctl")) | |
1247 | return -ENODEV; | |
d8d16e47 | 1248 | |
1da177e4 LT |
1249 | return ((status & ISI_RTS) ? TIOCM_RTS : 0) | |
1250 | ((status & ISI_DTR) ? TIOCM_DTR : 0) | | |
1251 | ((status & ISI_DCD) ? TIOCM_CAR : 0) | | |
1252 | ((status & ISI_DSR) ? TIOCM_DSR : 0) | | |
1253 | ((status & ISI_CTS) ? TIOCM_CTS : 0) | | |
1254 | ((status & ISI_RI ) ? TIOCM_RI : 0); | |
1255 | } | |
1256 | ||
1257 | static int isicom_tiocmset(struct tty_struct *tty, struct file *file, | |
d8d16e47 | 1258 | unsigned int set, unsigned int clear) |
1da177e4 | 1259 | { |
8070e35c | 1260 | struct isi_port *port = tty->driver_data; |
d8d16e47 | 1261 | |
1da177e4 LT |
1262 | if (isicom_paranoia_check(port, tty->name, "isicom_ioctl")) |
1263 | return -ENODEV; | |
d8d16e47 | 1264 | |
1da177e4 LT |
1265 | if (set & TIOCM_RTS) |
1266 | raise_rts(port); | |
1267 | if (set & TIOCM_DTR) | |
1268 | raise_dtr(port); | |
1269 | ||
1270 | if (clear & TIOCM_RTS) | |
1271 | drop_rts(port); | |
1272 | if (clear & TIOCM_DTR) | |
1273 | drop_dtr(port); | |
1274 | ||
1275 | return 0; | |
d8d16e47 | 1276 | } |
1da177e4 | 1277 | |
d8d16e47 JS |
1278 | static int isicom_set_serial_info(struct isi_port *port, |
1279 | struct serial_struct __user *info) | |
1da177e4 LT |
1280 | { |
1281 | struct serial_struct newinfo; | |
1282 | int reconfig_port; | |
1283 | ||
d8d16e47 | 1284 | if (copy_from_user(&newinfo, info, sizeof(newinfo))) |
1da177e4 | 1285 | return -EFAULT; |
d8d16e47 JS |
1286 | |
1287 | reconfig_port = ((port->flags & ASYNC_SPD_MASK) != | |
1288 | (newinfo.flags & ASYNC_SPD_MASK)); | |
1289 | ||
1da177e4 LT |
1290 | if (!capable(CAP_SYS_ADMIN)) { |
1291 | if ((newinfo.close_delay != port->close_delay) || | |
d8d16e47 JS |
1292 | (newinfo.closing_wait != port->closing_wait) || |
1293 | ((newinfo.flags & ~ASYNC_USR_MASK) != | |
1294 | (port->flags & ~ASYNC_USR_MASK))) | |
1da177e4 LT |
1295 | return -EPERM; |
1296 | port->flags = ((port->flags & ~ ASYNC_USR_MASK) | | |
1297 | (newinfo.flags & ASYNC_USR_MASK)); | |
d8d16e47 | 1298 | } |
1da177e4 LT |
1299 | else { |
1300 | port->close_delay = newinfo.close_delay; | |
d8d16e47 JS |
1301 | port->closing_wait = newinfo.closing_wait; |
1302 | port->flags = ((port->flags & ~ASYNC_FLAGS) | | |
1da177e4 LT |
1303 | (newinfo.flags & ASYNC_FLAGS)); |
1304 | } | |
1305 | if (reconfig_port) { | |
1306 | isicom_config_port(port); | |
1307 | } | |
d8d16e47 JS |
1308 | return 0; |
1309 | } | |
1da177e4 | 1310 | |
d8d16e47 JS |
1311 | static int isicom_get_serial_info(struct isi_port *port, |
1312 | struct serial_struct __user *info) | |
1da177e4 LT |
1313 | { |
1314 | struct serial_struct out_info; | |
d8d16e47 | 1315 | |
1da177e4 LT |
1316 | memset(&out_info, 0, sizeof(out_info)); |
1317 | /* out_info.type = ? */ | |
1318 | out_info.line = port - isi_ports; | |
1319 | out_info.port = port->card->base; | |
1320 | out_info.irq = port->card->irq; | |
1321 | out_info.flags = port->flags; | |
1322 | /* out_info.baud_base = ? */ | |
1323 | out_info.close_delay = port->close_delay; | |
1324 | out_info.closing_wait = port->closing_wait; | |
d8d16e47 | 1325 | if (copy_to_user(info, &out_info, sizeof(out_info))) |
1da177e4 LT |
1326 | return -EFAULT; |
1327 | return 0; | |
d8d16e47 | 1328 | } |
1da177e4 | 1329 | |
d8d16e47 JS |
1330 | static int isicom_ioctl(struct tty_struct *tty, struct file *filp, |
1331 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1332 | { |
8070e35c | 1333 | struct isi_port *port = tty->driver_data; |
1da177e4 LT |
1334 | void __user *argp = (void __user *)arg; |
1335 | int retval; | |
1336 | ||
1337 | if (isicom_paranoia_check(port, tty->name, "isicom_ioctl")) | |
1338 | return -ENODEV; | |
1339 | ||
1340 | switch(cmd) { | |
d8d16e47 JS |
1341 | case TCSBRK: |
1342 | retval = tty_check_change(tty); | |
1343 | if (retval) | |
1344 | return retval; | |
1345 | tty_wait_until_sent(tty, 0); | |
1346 | if (!arg) | |
1347 | isicom_send_break(port, HZ/4); | |
1348 | return 0; | |
1349 | ||
1350 | case TCSBRKP: | |
1351 | retval = tty_check_change(tty); | |
1352 | if (retval) | |
1353 | return retval; | |
1354 | tty_wait_until_sent(tty, 0); | |
1355 | isicom_send_break(port, arg ? arg * (HZ/10) : HZ/4); | |
1356 | return 0; | |
1357 | ||
1358 | case TIOCGSOFTCAR: | |
a547dfe9 JS |
1359 | return put_user(C_CLOCAL(tty) ? 1 : 0, |
1360 | (unsigned long __user *)argp); | |
d8d16e47 JS |
1361 | |
1362 | case TIOCSSOFTCAR: | |
1363 | if (get_user(arg, (unsigned long __user *) argp)) | |
1364 | return -EFAULT; | |
1365 | tty->termios->c_cflag = | |
1366 | ((tty->termios->c_cflag & ~CLOCAL) | | |
1367 | (arg ? CLOCAL : 0)); | |
1368 | return 0; | |
1369 | ||
1370 | case TIOCGSERIAL: | |
1371 | return isicom_get_serial_info(port, argp); | |
1372 | ||
1373 | case TIOCSSERIAL: | |
1374 | return isicom_set_serial_info(port, argp); | |
1375 | ||
1376 | default: | |
1377 | return -ENOIOCTLCMD; | |
1da177e4 LT |
1378 | } |
1379 | return 0; | |
1380 | } | |
1381 | ||
1382 | /* set_termios et all */ | |
d8d16e47 | 1383 | static void isicom_set_termios(struct tty_struct *tty, |
606d099c | 1384 | struct ktermios *old_termios) |
1da177e4 | 1385 | { |
8070e35c | 1386 | struct isi_port *port = tty->driver_data; |
d8d16e47 | 1387 | |
1da177e4 LT |
1388 | if (isicom_paranoia_check(port, tty->name, "isicom_set_termios")) |
1389 | return; | |
d8d16e47 | 1390 | |
1da177e4 | 1391 | if (tty->termios->c_cflag == old_termios->c_cflag && |
d8d16e47 | 1392 | tty->termios->c_iflag == old_termios->c_iflag) |
1da177e4 | 1393 | return; |
d8d16e47 | 1394 | |
1da177e4 | 1395 | isicom_config_port(port); |
d8d16e47 | 1396 | |
1da177e4 | 1397 | if ((old_termios->c_cflag & CRTSCTS) && |
d8d16e47 | 1398 | !(tty->termios->c_cflag & CRTSCTS)) { |
1da177e4 | 1399 | tty->hw_stopped = 0; |
d8d16e47 JS |
1400 | isicom_start(tty); |
1401 | } | |
1da177e4 LT |
1402 | } |
1403 | ||
1404 | /* throttle et all */ | |
d8d16e47 | 1405 | static void isicom_throttle(struct tty_struct *tty) |
1da177e4 | 1406 | { |
8070e35c | 1407 | struct isi_port *port = tty->driver_data; |
d8d16e47 JS |
1408 | struct isi_board *card = port->card; |
1409 | ||
1da177e4 LT |
1410 | if (isicom_paranoia_check(port, tty->name, "isicom_throttle")) |
1411 | return; | |
d8d16e47 | 1412 | |
1da177e4 LT |
1413 | /* tell the card that this port cannot handle any more data for now */ |
1414 | card->port_status &= ~(1 << port->channel); | |
1415 | outw(card->port_status, card->base + 0x02); | |
1416 | } | |
1417 | ||
1418 | /* unthrottle et all */ | |
d8d16e47 | 1419 | static void isicom_unthrottle(struct tty_struct *tty) |
1da177e4 | 1420 | { |
8070e35c | 1421 | struct isi_port *port = tty->driver_data; |
d8d16e47 JS |
1422 | struct isi_board *card = port->card; |
1423 | ||
1da177e4 LT |
1424 | if (isicom_paranoia_check(port, tty->name, "isicom_unthrottle")) |
1425 | return; | |
d8d16e47 | 1426 | |
1da177e4 LT |
1427 | /* tell the card that this port is ready to accept more data */ |
1428 | card->port_status |= (1 << port->channel); | |
1429 | outw(card->port_status, card->base + 0x02); | |
1430 | } | |
1431 | ||
1432 | /* stop et all */ | |
d8d16e47 | 1433 | static void isicom_stop(struct tty_struct *tty) |
1da177e4 | 1434 | { |
8070e35c | 1435 | struct isi_port *port = tty->driver_data; |
1da177e4 LT |
1436 | |
1437 | if (isicom_paranoia_check(port, tty->name, "isicom_stop")) | |
1438 | return; | |
d8d16e47 | 1439 | |
1da177e4 LT |
1440 | /* this tells the transmitter not to consider this port for |
1441 | data output to the card. */ | |
1442 | port->status &= ~ISI_TXOK; | |
1443 | } | |
1444 | ||
1445 | /* start et all */ | |
d8d16e47 | 1446 | static void isicom_start(struct tty_struct *tty) |
1da177e4 | 1447 | { |
8070e35c | 1448 | struct isi_port *port = tty->driver_data; |
d8d16e47 | 1449 | |
1da177e4 LT |
1450 | if (isicom_paranoia_check(port, tty->name, "isicom_start")) |
1451 | return; | |
d8d16e47 | 1452 | |
1da177e4 LT |
1453 | /* this tells the transmitter to consider this port for |
1454 | data output to the card. */ | |
1455 | port->status |= ISI_TXOK; | |
1456 | } | |
1457 | ||
1458 | /* hangup et all */ | |
c4028958 | 1459 | static void do_isicom_hangup(struct work_struct *work) |
1da177e4 | 1460 | { |
c4028958 | 1461 | struct isi_port *port = container_of(work, struct isi_port, hangup_tq); |
d8d16e47 JS |
1462 | struct tty_struct *tty; |
1463 | ||
1da177e4 LT |
1464 | tty = port->tty; |
1465 | if (tty) | |
1466 | tty_hangup(tty); | |
1467 | } | |
1468 | ||
d8d16e47 | 1469 | static void isicom_hangup(struct tty_struct *tty) |
1da177e4 | 1470 | { |
8070e35c | 1471 | struct isi_port *port = tty->driver_data; |
d8d16e47 | 1472 | |
1da177e4 LT |
1473 | if (isicom_paranoia_check(port, tty->name, "isicom_hangup")) |
1474 | return; | |
d8d16e47 | 1475 | |
1da177e4 LT |
1476 | isicom_shutdown_port(port); |
1477 | port->count = 0; | |
1478 | port->flags &= ~ASYNC_NORMAL_ACTIVE; | |
1479 | port->tty = NULL; | |
1480 | wake_up_interruptible(&port->open_wait); | |
1481 | } | |
1482 | ||
1483 | /* flush_buffer et all */ | |
d8d16e47 | 1484 | static void isicom_flush_buffer(struct tty_struct *tty) |
1da177e4 | 1485 | { |
8070e35c | 1486 | struct isi_port *port = tty->driver_data; |
d8d16e47 | 1487 | struct isi_board *card = port->card; |
1da177e4 | 1488 | unsigned long flags; |
d8d16e47 | 1489 | |
1da177e4 LT |
1490 | if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer")) |
1491 | return; | |
d8d16e47 | 1492 | |
1da177e4 LT |
1493 | spin_lock_irqsave(&card->card_lock, flags); |
1494 | port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; | |
1495 | spin_unlock_irqrestore(&card->card_lock, flags); | |
d8d16e47 | 1496 | |
1da177e4 LT |
1497 | wake_up_interruptible(&tty->write_wait); |
1498 | tty_wakeup(tty); | |
1499 | } | |
1500 | ||
9ac0948b JS |
1501 | /* |
1502 | * Driver init and deinit functions | |
1503 | */ | |
1da177e4 | 1504 | |
b68e31d0 | 1505 | static const struct tty_operations isicom_ops = { |
d8d16e47 JS |
1506 | .open = isicom_open, |
1507 | .close = isicom_close, | |
1508 | .write = isicom_write, | |
1509 | .put_char = isicom_put_char, | |
1510 | .flush_chars = isicom_flush_chars, | |
1511 | .write_room = isicom_write_room, | |
1da177e4 | 1512 | .chars_in_buffer = isicom_chars_in_buffer, |
d8d16e47 JS |
1513 | .ioctl = isicom_ioctl, |
1514 | .set_termios = isicom_set_termios, | |
1515 | .throttle = isicom_throttle, | |
1516 | .unthrottle = isicom_unthrottle, | |
1517 | .stop = isicom_stop, | |
1518 | .start = isicom_start, | |
1519 | .hangup = isicom_hangup, | |
1520 | .flush_buffer = isicom_flush_buffer, | |
1521 | .tiocmget = isicom_tiocmget, | |
1522 | .tiocmset = isicom_tiocmset, | |
1da177e4 LT |
1523 | }; |
1524 | ||
9ac0948b JS |
1525 | static int __devinit reset_card(struct pci_dev *pdev, |
1526 | const unsigned int card, unsigned int *signature) | |
1da177e4 | 1527 | { |
9ac0948b JS |
1528 | struct isi_board *board = pci_get_drvdata(pdev); |
1529 | unsigned long base = board->base; | |
1530 | unsigned int portcount = 0; | |
1531 | int retval = 0; | |
d8d16e47 | 1532 | |
9ac0948b JS |
1533 | dev_dbg(&pdev->dev, "ISILoad:Resetting Card%d at 0x%lx\n", card + 1, |
1534 | base); | |
d8d16e47 | 1535 | |
9ac0948b | 1536 | inw(base + 0x8); |
d8d16e47 | 1537 | |
9ac0948b JS |
1538 | mdelay(10); |
1539 | ||
1540 | outw(0, base + 0x8); /* Reset */ | |
1541 | ||
1542 | msleep(3000); | |
1543 | ||
1544 | *signature = inw(base + 0x4) & 0xff; | |
1545 | ||
18234f88 JS |
1546 | portcount = inw(base + 0x2); |
1547 | if (!(inw(base + 0xe) & 0x1) || ((portcount != 0) && | |
1548 | (portcount != 4) && (portcount != 8))) { | |
1549 | dev_dbg(&pdev->dev, "base+0x2=0x%lx, base+0xe=0x%lx\n", | |
1550 | inw(base + 0x2), inw(base + 0xe)); | |
1551 | dev_err(&pdev->dev, "ISILoad:PCI Card%d reset failure " | |
1552 | "(Possible bad I/O Port Address 0x%lx).\n", | |
1553 | card + 1, base); | |
1554 | retval = -EIO; | |
1555 | goto end; | |
9ac0948b JS |
1556 | } |
1557 | ||
1558 | switch (*signature) { | |
1559 | case 0xa5: | |
1560 | case 0xbb: | |
1561 | case 0xdd: | |
18234f88 | 1562 | board->port_count = (portcount == 4) ? 4 : 8; |
9ac0948b JS |
1563 | board->shift_count = 12; |
1564 | break; | |
1565 | case 0xcc: | |
1566 | board->port_count = 16; | |
1567 | board->shift_count = 11; | |
1568 | break; | |
1569 | default: | |
1570 | dev_warn(&pdev->dev, "ISILoad:Card%d reset failure (Possible " | |
1571 | "bad I/O Port Address 0x%lx).\n", card + 1, base); | |
1572 | dev_dbg(&pdev->dev, "Sig=0x%lx\n", signature); | |
1573 | retval = -EIO; | |
d8d16e47 | 1574 | } |
9ac0948b | 1575 | dev_info(&pdev->dev, "-Done\n"); |
d8d16e47 | 1576 | |
9ac0948b JS |
1577 | end: |
1578 | return retval; | |
1da177e4 LT |
1579 | } |
1580 | ||
e65c1db1 JS |
1581 | static inline int WaitTillCardIsFree(u16 base) |
1582 | { | |
1583 | unsigned long count = 0; | |
1584 | ||
1585 | while (!(inw(base + 0xe) & 0x1) && count++ < 100) | |
1586 | msleep(5); | |
1587 | ||
1588 | return !(inw(base + 0xe) & 0x1); | |
1589 | } | |
1590 | ||
1591 | static int __devinit load_firmware(struct pci_dev *pdev, | |
1592 | const unsigned int index, const unsigned int signature) | |
1593 | { | |
1594 | struct isi_board *board = pci_get_drvdata(pdev); | |
1595 | const struct firmware *fw; | |
1596 | unsigned long base = board->base; | |
1597 | unsigned int a; | |
1598 | u16 word_count, status; | |
1599 | int retval = -EIO; | |
1600 | char *name; | |
1601 | u8 *data; | |
1602 | ||
1603 | struct stframe { | |
1604 | u16 addr; | |
1605 | u16 count; | |
1606 | u8 data[0]; | |
1607 | } *frame; | |
1608 | ||
1609 | switch (signature) { | |
1610 | case 0xa5: | |
1611 | name = "isi608.bin"; | |
1612 | break; | |
1613 | case 0xbb: | |
1614 | name = "isi608em.bin"; | |
1615 | break; | |
1616 | case 0xcc: | |
1617 | name = "isi616em.bin"; | |
1618 | break; | |
1619 | case 0xdd: | |
1620 | name = "isi4608.bin"; | |
1621 | break; | |
1622 | case 0xee: | |
1623 | name = "isi4616.bin"; | |
1624 | break; | |
1625 | default: | |
1626 | dev_err(&pdev->dev, "Unknown signature.\n"); | |
1627 | goto end; | |
1628 | } | |
1629 | ||
1630 | retval = request_firmware(&fw, name, &pdev->dev); | |
1631 | if (retval) | |
1632 | goto end; | |
1633 | ||
e4e04088 JS |
1634 | retval = -EIO; |
1635 | ||
e65c1db1 JS |
1636 | for (frame = (struct stframe *)fw->data; |
1637 | frame < (struct stframe *)(fw->data + fw->size); | |
e4e04088 JS |
1638 | frame = (struct stframe *)((u8 *)(frame + 1) + |
1639 | frame->count)) { | |
e65c1db1 JS |
1640 | if (WaitTillCardIsFree(base)) |
1641 | goto errrelfw; | |
1642 | ||
1643 | outw(0xf0, base); /* start upload sequence */ | |
1644 | outw(0x00, base); | |
1645 | outw(frame->addr, base); /* lsb of address */ | |
1646 | ||
1647 | word_count = frame->count / 2 + frame->count % 2; | |
1648 | outw(word_count, base); | |
1649 | InterruptTheCard(base); | |
1650 | ||
1651 | udelay(100); /* 0x2f */ | |
1652 | ||
1653 | if (WaitTillCardIsFree(base)) | |
1654 | goto errrelfw; | |
1655 | ||
1656 | if ((status = inw(base + 0x4)) != 0) { | |
1657 | dev_warn(&pdev->dev, "Card%d rejected load header:\n" | |
1658 | "Address:0x%x\nCount:0x%x\nStatus:0x%x\n", | |
1659 | index + 1, frame->addr, frame->count, status); | |
1660 | goto errrelfw; | |
1661 | } | |
1662 | outsw(base, frame->data, word_count); | |
1663 | ||
1664 | InterruptTheCard(base); | |
1665 | ||
1666 | udelay(50); /* 0x0f */ | |
1667 | ||
1668 | if (WaitTillCardIsFree(base)) | |
1669 | goto errrelfw; | |
1670 | ||
1671 | if ((status = inw(base + 0x4)) != 0) { | |
1672 | dev_err(&pdev->dev, "Card%d got out of sync.Card " | |
1673 | "Status:0x%x\n", index + 1, status); | |
1674 | goto errrelfw; | |
1675 | } | |
1676 | } | |
1677 | ||
e65c1db1 JS |
1678 | /* XXX: should we test it by reading it back and comparing with original like |
1679 | * in load firmware package? */ | |
e4e04088 JS |
1680 | for (frame = (struct stframe *)fw->data; |
1681 | frame < (struct stframe *)(fw->data + fw->size); | |
1682 | frame = (struct stframe *)((u8 *)(frame + 1) + | |
1683 | frame->count)) { | |
e65c1db1 JS |
1684 | if (WaitTillCardIsFree(base)) |
1685 | goto errrelfw; | |
1686 | ||
1687 | outw(0xf1, base); /* start download sequence */ | |
1688 | outw(0x00, base); | |
1689 | outw(frame->addr, base); /* lsb of address */ | |
1690 | ||
1691 | word_count = (frame->count >> 1) + frame->count % 2; | |
1692 | outw(word_count + 1, base); | |
1693 | InterruptTheCard(base); | |
1694 | ||
1695 | udelay(50); /* 0xf */ | |
1696 | ||
1697 | if (WaitTillCardIsFree(base)) | |
1698 | goto errrelfw; | |
1699 | ||
1700 | if ((status = inw(base + 0x4)) != 0) { | |
1701 | dev_warn(&pdev->dev, "Card%d rejected verify header:\n" | |
1702 | "Address:0x%x\nCount:0x%x\nStatus: 0x%x\n", | |
1703 | index + 1, frame->addr, frame->count, status); | |
1704 | goto errrelfw; | |
1705 | } | |
1706 | ||
1707 | data = kmalloc(word_count * 2, GFP_KERNEL); | |
f0671378 JS |
1708 | if (data == NULL) { |
1709 | dev_err(&pdev->dev, "Card%d, firmware upload " | |
1710 | "failed, not enough memory\n", index + 1); | |
1711 | goto errrelfw; | |
1712 | } | |
e65c1db1 JS |
1713 | inw(base); |
1714 | insw(base, data, word_count); | |
1715 | InterruptTheCard(base); | |
1716 | ||
1717 | for (a = 0; a < frame->count; a++) | |
1718 | if (data[a] != frame->data[a]) { | |
1719 | kfree(data); | |
1720 | dev_err(&pdev->dev, "Card%d, firmware upload " | |
1721 | "failed\n", index + 1); | |
1722 | goto errrelfw; | |
1723 | } | |
1724 | kfree(data); | |
1725 | ||
1726 | udelay(50); /* 0xf */ | |
1727 | ||
1728 | if (WaitTillCardIsFree(base)) | |
1729 | goto errrelfw; | |
1730 | ||
1731 | if ((status = inw(base + 0x4)) != 0) { | |
1732 | dev_err(&pdev->dev, "Card%d verify got out of sync. " | |
1733 | "Card Status:0x%x\n", index + 1, status); | |
1734 | goto errrelfw; | |
1735 | } | |
1736 | } | |
1737 | ||
e4e04088 JS |
1738 | /* xfer ctrl */ |
1739 | if (WaitTillCardIsFree(base)) | |
1740 | goto errrelfw; | |
1741 | ||
1742 | outw(0xf2, base); | |
1743 | outw(0x800, base); | |
1744 | outw(0x0, base); | |
1745 | outw(0x0, base); | |
1746 | InterruptTheCard(base); | |
1747 | outw(0x0, base + 0x4); /* for ISI4608 cards */ | |
1748 | ||
e65c1db1 JS |
1749 | board->status |= FIRMWARE_LOADED; |
1750 | retval = 0; | |
1751 | ||
1752 | errrelfw: | |
1753 | release_firmware(fw); | |
1754 | end: | |
1755 | return retval; | |
1756 | } | |
1757 | ||
1da177e4 LT |
1758 | /* |
1759 | * Insmod can set static symbols so keep these static | |
1760 | */ | |
9ac0948b JS |
1761 | static int card; |
1762 | ||
1763 | static int __devinit isicom_probe(struct pci_dev *pdev, | |
1764 | const struct pci_device_id *ent) | |
1765 | { | |
1766 | unsigned int ioaddr, signature, index; | |
1767 | int retval = -EPERM; | |
1768 | u8 pciirq; | |
1769 | struct isi_board *board = NULL; | |
1770 | ||
1771 | if (card >= BOARD_COUNT) | |
1772 | goto err; | |
1773 | ||
1774 | ioaddr = pci_resource_start(pdev, 3); | |
1775 | /* i.e at offset 0x1c in the PCI configuration register space. */ | |
1776 | pciirq = pdev->irq; | |
1777 | dev_info(&pdev->dev, "ISI PCI Card(Device ID 0x%x)\n", ent->device); | |
1778 | ||
1779 | /* allot the first empty slot in the array */ | |
1780 | for (index = 0; index < BOARD_COUNT; index++) | |
1781 | if (isi_card[index].base == 0) { | |
1782 | board = &isi_card[index]; | |
1783 | break; | |
1784 | } | |
1785 | ||
938a7023 | 1786 | board->index = index; |
9ac0948b JS |
1787 | board->base = ioaddr; |
1788 | board->irq = pciirq; | |
9ac0948b JS |
1789 | card++; |
1790 | ||
1791 | pci_set_drvdata(pdev, board); | |
1792 | ||
78028da9 JS |
1793 | retval = pci_request_region(pdev, 3, ISICOM_NAME); |
1794 | if (retval) { | |
09a4a112 JS |
1795 | dev_err(&pdev->dev, "I/O Region 0x%lx-0x%lx is busy. Card%d " |
1796 | "will be disabled.\n", board->base, board->base + 15, | |
1797 | index + 1); | |
1798 | retval = -EBUSY; | |
9ac0948b | 1799 | goto err; |
09a4a112 | 1800 | } |
9ac0948b | 1801 | |
09a4a112 JS |
1802 | retval = request_irq(board->irq, isicom_interrupt, |
1803 | IRQF_SHARED | IRQF_DISABLED, ISICOM_NAME, board); | |
1804 | if (retval < 0) { | |
1805 | dev_err(&pdev->dev, "Could not install handler at Irq %d. " | |
1806 | "Card%d will be disabled.\n", board->irq, index + 1); | |
9ac0948b | 1807 | goto errunrr; |
09a4a112 | 1808 | } |
9ac0948b JS |
1809 | |
1810 | retval = reset_card(pdev, index, &signature); | |
1811 | if (retval < 0) | |
1812 | goto errunri; | |
1813 | ||
e65c1db1 JS |
1814 | retval = load_firmware(pdev, index, signature); |
1815 | if (retval < 0) | |
1816 | goto errunri; | |
1817 | ||
938a7023 JS |
1818 | for (index = 0; index < board->port_count; index++) |
1819 | tty_register_device(isicom_normal, board->index * 16 + index, | |
1820 | &pdev->dev); | |
1821 | ||
9ac0948b JS |
1822 | return 0; |
1823 | ||
1824 | errunri: | |
1825 | free_irq(board->irq, board); | |
1826 | errunrr: | |
78028da9 | 1827 | pci_release_region(pdev, 3); |
9ac0948b JS |
1828 | err: |
1829 | board->base = 0; | |
1830 | return retval; | |
1831 | } | |
1832 | ||
1833 | static void __devexit isicom_remove(struct pci_dev *pdev) | |
1834 | { | |
1835 | struct isi_board *board = pci_get_drvdata(pdev); | |
938a7023 JS |
1836 | unsigned int i; |
1837 | ||
1838 | for (i = 0; i < board->port_count; i++) | |
1839 | tty_unregister_device(isicom_normal, board->index * 16 + i); | |
9ac0948b JS |
1840 | |
1841 | free_irq(board->irq, board); | |
78028da9 | 1842 | pci_release_region(pdev, 3); |
9ac0948b | 1843 | } |
1da177e4 | 1844 | |
ca262005 | 1845 | static int __init isicom_init(void) |
1da177e4 | 1846 | { |
9ac0948b JS |
1847 | int retval, idx, channel; |
1848 | struct isi_port *port; | |
d8d16e47 | 1849 | |
1da177e4 | 1850 | card = 0; |
d8d16e47 | 1851 | |
9ac0948b JS |
1852 | for(idx = 0; idx < BOARD_COUNT; idx++) { |
1853 | port = &isi_ports[idx * 16]; | |
1854 | isi_card[idx].ports = port; | |
1855 | spin_lock_init(&isi_card[idx].card_lock); | |
1856 | for (channel = 0; channel < 16; channel++, port++) { | |
1857 | port->magic = ISICOM_MAGIC; | |
1858 | port->card = &isi_card[idx]; | |
1859 | port->channel = channel; | |
1860 | port->close_delay = 50 * HZ/100; | |
1861 | port->closing_wait = 3000 * HZ/100; | |
c4028958 DH |
1862 | INIT_WORK(&port->hangup_tq, do_isicom_hangup); |
1863 | INIT_WORK(&port->bh_tqueue, isicom_bottomhalf); | |
9ac0948b JS |
1864 | port->status = 0; |
1865 | init_waitqueue_head(&port->open_wait); | |
1866 | init_waitqueue_head(&port->close_wait); | |
1867 | /* . . . */ | |
1868 | } | |
1869 | isi_card[idx].base = 0; | |
1870 | isi_card[idx].irq = 0; | |
1da177e4 | 1871 | } |
d8d16e47 | 1872 | |
09a4a112 JS |
1873 | /* tty driver structure initialization */ |
1874 | isicom_normal = alloc_tty_driver(PORT_COUNT); | |
1875 | if (!isicom_normal) { | |
1876 | retval = -ENOMEM; | |
9ac0948b | 1877 | goto error; |
09a4a112 JS |
1878 | } |
1879 | ||
1880 | isicom_normal->owner = THIS_MODULE; | |
1881 | isicom_normal->name = "ttyM"; | |
1882 | isicom_normal->major = ISICOM_NMAJOR; | |
1883 | isicom_normal->minor_start = 0; | |
1884 | isicom_normal->type = TTY_DRIVER_TYPE_SERIAL; | |
1885 | isicom_normal->subtype = SERIAL_TYPE_NORMAL; | |
1886 | isicom_normal->init_termios = tty_std_termios; | |
1887 | isicom_normal->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | | |
1888 | CLOCAL; | |
938a7023 JS |
1889 | isicom_normal->flags = TTY_DRIVER_REAL_RAW | |
1890 | TTY_DRIVER_DYNAMIC_DEV; | |
09a4a112 JS |
1891 | tty_set_operations(isicom_normal, &isicom_ops); |
1892 | ||
1893 | retval = tty_register_driver(isicom_normal); | |
1894 | if (retval) { | |
1895 | pr_dbg("Couldn't register the dialin driver\n"); | |
1896 | goto err_puttty; | |
1897 | } | |
1da177e4 | 1898 | |
9ac0948b | 1899 | retval = pci_register_driver(&isicom_driver); |
1da177e4 | 1900 | if (retval < 0) { |
9ac0948b | 1901 | printk(KERN_ERR "ISICOM: Unable to register pci driver.\n"); |
09a4a112 | 1902 | goto err_unrtty; |
1da177e4 | 1903 | } |
d8d16e47 | 1904 | |
34b55b86 | 1905 | mod_timer(&tx, jiffies + 1); |
d8d16e47 | 1906 | |
1da177e4 | 1907 | return 0; |
09a4a112 JS |
1908 | err_unrtty: |
1909 | tty_unregister_driver(isicom_normal); | |
1910 | err_puttty: | |
1911 | put_tty_driver(isicom_normal); | |
9ac0948b JS |
1912 | error: |
1913 | return retval; | |
1da177e4 LT |
1914 | } |
1915 | ||
1916 | static void __exit isicom_exit(void) | |
1917 | { | |
1918 | re_schedule = 0; | |
aaa246ea | 1919 | |
906cdecb | 1920 | wait_for_completion_timeout(&isi_timerdone, HZ); |
aaa246ea | 1921 | |
9ac0948b | 1922 | pci_unregister_driver(&isicom_driver); |
09a4a112 JS |
1923 | tty_unregister_driver(isicom_normal); |
1924 | put_tty_driver(isicom_normal); | |
1da177e4 LT |
1925 | } |
1926 | ||
ca262005 | 1927 | module_init(isicom_init); |
1da177e4 | 1928 | module_exit(isicom_exit); |
aaa246ea JS |
1929 | |
1930 | MODULE_AUTHOR("MultiTech"); | |
1931 | MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech"); | |
1932 | MODULE_LICENSE("GPL"); |