Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * This program is free software; you can redistribute it and/or | |
3 | * modify it under the terms of the GNU General Public License | |
4 | * as published by the Free Software Foundation; either version | |
5 | * 2 of the License, or (at your option) any later version. | |
6 | * | |
7 | * Original driver code supplied by Multi-Tech | |
8 | * | |
9 | * Changes | |
10 | * 1/9/98 alan@redhat.com Merge to 2.0.x kernel tree | |
11 | * Obtain and use official major/minors | |
12 | * Loader switched to a misc device | |
13 | * (fixed range check bug as a side effect) | |
14 | * Printk clean up | |
15 | * 9/12/98 alan@redhat.com Rough port to 2.1.x | |
16 | * | |
17 | * 10/6/99 sameer Merged the ISA and PCI drivers to | |
18 | * a new unified driver. | |
19 | * | |
20 | * 3/9/99 sameer Added support for ISI4616 cards. | |
21 | * | |
22 | * 16/9/99 sameer We do not force RTS low anymore. | |
d8d16e47 | 23 | * This is to prevent the firmware |
1da177e4 LT |
24 | * from getting confused. |
25 | * | |
26 | * 26/10/99 sameer Cosmetic changes:The driver now | |
27 | * dumps the Port Count information | |
28 | * along with I/O address and IRQ. | |
29 | * | |
30 | * 13/12/99 sameer Fixed the problem with IRQ sharing. | |
31 | * | |
32 | * 10/5/00 sameer Fixed isicom_shutdown_board() | |
33 | * to not lower DTR on all the ports | |
d8d16e47 | 34 | * when the last port on the card is |
1da177e4 LT |
35 | * closed. |
36 | * | |
37 | * 10/5/00 sameer Signal mask setup command added | |
d8d16e47 | 38 | * to isicom_setup_port and |
1da177e4 LT |
39 | * isicom_shutdown_port. |
40 | * | |
41 | * 24/5/00 sameer The driver is now SMP aware. | |
d8d16e47 JS |
42 | * |
43 | * | |
1da177e4 | 44 | * 27/11/00 Vinayak P Risbud Fixed the Driver Crash Problem |
d8d16e47 JS |
45 | * |
46 | * | |
1da177e4 LT |
47 | * 03/01/01 anil .s Added support for resetting the |
48 | * internal modems on ISI cards. | |
49 | * | |
50 | * 08/02/01 anil .s Upgraded the driver for kernel | |
51 | * 2.4.x | |
52 | * | |
d8d16e47 | 53 | * 11/04/01 Kevin Fixed firmware load problem with |
1da177e4 | 54 | * ISIHP-4X card |
d8d16e47 | 55 | * |
1da177e4 LT |
56 | * 30/04/01 anil .s Fixed the remote login through |
57 | * ISI port problem. Now the link | |
58 | * does not go down before password | |
59 | * prompt. | |
60 | * | |
61 | * 03/05/01 anil .s Fixed the problem with IRQ sharing | |
62 | * among ISI-PCI cards. | |
63 | * | |
64 | * 03/05/01 anil .s Added support to display the version | |
d8d16e47 | 65 | * info during insmod as well as module |
1da177e4 | 66 | * listing by lsmod. |
d8d16e47 | 67 | * |
1da177e4 LT |
68 | * 10/05/01 anil .s Done the modifications to the source |
69 | * file and Install script so that the | |
70 | * same installation can be used for | |
71 | * 2.2.x and 2.4.x kernel. | |
72 | * | |
73 | * 06/06/01 anil .s Now we drop both dtr and rts during | |
74 | * shutdown_port as well as raise them | |
75 | * during isicom_config_port. | |
d8d16e47 | 76 | * |
1da177e4 LT |
77 | * 09/06/01 acme@conectiva.com.br use capable, not suser, do |
78 | * restore_flags on failure in | |
79 | * isicom_send_break, verify put_user | |
80 | * result | |
81 | * | |
d8d16e47 JS |
82 | * 11/02/03 ranjeeth Added support for 230 Kbps and 460 Kbps |
83 | * Baud index extended to 21 | |
84 | * | |
85 | * 20/03/03 ranjeeth Made to work for Linux Advanced server. | |
86 | * Taken care of license warning. | |
87 | * | |
88 | * 10/12/03 Ravindra Made to work for Fedora Core 1 of | |
1da177e4 LT |
89 | * Red Hat Distribution |
90 | * | |
91 | * 06/01/05 Alan Cox Merged the ISI and base kernel strands | |
92 | * into a single 2.6 driver | |
93 | * | |
94 | * *********************************************************** | |
95 | * | |
d8d16e47 | 96 | * To use this driver you also need the support package. You |
1da177e4 LT |
97 | * can find this in RPM format on |
98 | * ftp://ftp.linux.org.uk/pub/linux/alan | |
d8d16e47 | 99 | * |
1da177e4 LT |
100 | * You can find the original tools for this direct from Multitech |
101 | * ftp://ftp.multitech.com/ISI-Cards/ | |
102 | * | |
103 | * Having installed the cards the module options (/etc/modprobe.conf) | |
104 | * | |
105 | * options isicom io=card1,card2,card3,card4 irq=card1,card2,card3,card4 | |
106 | * | |
107 | * Omit those entries for boards you don't have installed. | |
108 | * | |
109 | * TODO | |
1da177e4 LT |
110 | * Merge testing |
111 | * 64-bit verification | |
112 | */ | |
113 | ||
114 | #include <linux/module.h> | |
e65c1db1 | 115 | #include <linux/firmware.h> |
1da177e4 LT |
116 | #include <linux/kernel.h> |
117 | #include <linux/tty.h> | |
33f0f88f | 118 | #include <linux/tty_flip.h> |
1da177e4 LT |
119 | #include <linux/termios.h> |
120 | #include <linux/fs.h> | |
121 | #include <linux/sched.h> | |
122 | #include <linux/serial.h> | |
123 | #include <linux/mm.h> | |
1da177e4 LT |
124 | #include <linux/interrupt.h> |
125 | #include <linux/timer.h> | |
126 | #include <linux/delay.h> | |
127 | #include <linux/ioport.h> | |
128 | ||
129 | #include <asm/uaccess.h> | |
130 | #include <asm/io.h> | |
131 | #include <asm/system.h> | |
132 | ||
133 | #include <linux/pci.h> | |
134 | ||
135 | #include <linux/isicom.h> | |
136 | ||
aaa246ea JS |
137 | #define InterruptTheCard(base) outw(0, (base) + 0xc) |
138 | #define ClearInterrupt(base) inw((base) + 0x0a) | |
139 | ||
73b52572 | 140 | #define pr_dbg(str...) pr_debug("ISICOM: " str) |
aaa246ea | 141 | #ifdef DEBUG |
aaa246ea JS |
142 | #define isicom_paranoia_check(a, b, c) __isicom_paranoia_check((a), (b), (c)) |
143 | #else | |
aaa246ea JS |
144 | #define isicom_paranoia_check(a, b, c) 0 |
145 | #endif | |
146 | ||
9ac0948b JS |
147 | static int isicom_probe(struct pci_dev *, const struct pci_device_id *); |
148 | static void __devexit isicom_remove(struct pci_dev *); | |
149 | ||
1da177e4 | 150 | static struct pci_device_id isicom_pci_tbl[] = { |
9ac0948b JS |
151 | { PCI_DEVICE(VENDOR_ID, 0x2028) }, |
152 | { PCI_DEVICE(VENDOR_ID, 0x2051) }, | |
153 | { PCI_DEVICE(VENDOR_ID, 0x2052) }, | |
154 | { PCI_DEVICE(VENDOR_ID, 0x2053) }, | |
155 | { PCI_DEVICE(VENDOR_ID, 0x2054) }, | |
156 | { PCI_DEVICE(VENDOR_ID, 0x2055) }, | |
157 | { PCI_DEVICE(VENDOR_ID, 0x2056) }, | |
158 | { PCI_DEVICE(VENDOR_ID, 0x2057) }, | |
159 | { PCI_DEVICE(VENDOR_ID, 0x2058) }, | |
1da177e4 LT |
160 | { 0 } |
161 | }; | |
162 | MODULE_DEVICE_TABLE(pci, isicom_pci_tbl); | |
163 | ||
9ac0948b JS |
164 | static struct pci_driver isicom_driver = { |
165 | .name = "isicom", | |
166 | .id_table = isicom_pci_tbl, | |
167 | .probe = isicom_probe, | |
168 | .remove = __devexit_p(isicom_remove) | |
169 | }; | |
170 | ||
1da177e4 LT |
171 | static int prev_card = 3; /* start servicing isi_card[0] */ |
172 | static struct tty_driver *isicom_normal; | |
173 | ||
906cdecb | 174 | static DECLARE_COMPLETION(isi_timerdone); |
1da177e4 | 175 | static char re_schedule = 1; |
1da177e4 | 176 | |
1da177e4 | 177 | static void isicom_tx(unsigned long _data); |
d8d16e47 | 178 | static void isicom_start(struct tty_struct *tty); |
1da177e4 | 179 | |
34b55b86 JS |
180 | static DEFINE_TIMER(tx, isicom_tx, 0, 0); |
181 | ||
1da177e4 LT |
182 | /* baud index mappings from linux defns to isi */ |
183 | ||
184 | static signed char linuxb_to_isib[] = { | |
7edc136a | 185 | -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 16, 17, 18, 19, 20, 21 |
1da177e4 LT |
186 | }; |
187 | ||
188 | struct isi_board { | |
8070e35c | 189 | unsigned long base; |
1da177e4 LT |
190 | unsigned char irq; |
191 | unsigned char port_count; | |
192 | unsigned short status; | |
a547dfe9 | 193 | unsigned short port_status; /* each bit for each port */ |
1da177e4 LT |
194 | unsigned short shift_count; |
195 | struct isi_port * ports; | |
196 | signed char count; | |
1da177e4 LT |
197 | spinlock_t card_lock; /* Card wide lock 11/5/00 -sameer */ |
198 | unsigned long flags; | |
938a7023 | 199 | unsigned int index; |
1da177e4 LT |
200 | }; |
201 | ||
202 | struct isi_port { | |
203 | unsigned short magic; | |
204 | unsigned int flags; | |
205 | int count; | |
206 | int blocked_open; | |
207 | int close_delay; | |
8070e35c JS |
208 | u16 channel; |
209 | u16 status; | |
210 | u16 closing_wait; | |
1da177e4 LT |
211 | struct isi_board * card; |
212 | struct tty_struct * tty; | |
213 | wait_queue_head_t close_wait; | |
214 | wait_queue_head_t open_wait; | |
1da177e4 LT |
215 | unsigned char * xmit_buf; |
216 | int xmit_head; | |
217 | int xmit_tail; | |
218 | int xmit_cnt; | |
219 | }; | |
220 | ||
221 | static struct isi_board isi_card[BOARD_COUNT]; | |
222 | static struct isi_port isi_ports[PORT_COUNT]; | |
223 | ||
224 | /* | |
225 | * Locking functions for card level locking. We need to own both | |
226 | * the kernel lock for the card and have the card in a position that | |
227 | * it wants to talk. | |
228 | */ | |
d8d16e47 | 229 | |
cfe7c09a JS |
230 | static inline int WaitTillCardIsFree(u16 base) |
231 | { | |
232 | unsigned int count = 0; | |
233 | unsigned int a = in_atomic(); /* do we run under spinlock? */ | |
234 | ||
235 | while (!(inw(base + 0xe) & 0x1) && count++ < 100) | |
236 | if (a) | |
237 | mdelay(1); | |
238 | else | |
239 | msleep(1); | |
240 | ||
241 | return !(inw(base + 0xe) & 0x1); | |
242 | } | |
243 | ||
1da177e4 LT |
244 | static int lock_card(struct isi_board *card) |
245 | { | |
8070e35c | 246 | unsigned long base = card->base; |
5b21f9dd | 247 | unsigned int retries, a; |
1da177e4 | 248 | |
5b21f9dd | 249 | for (retries = 0; retries < 10; retries++) { |
1da177e4 | 250 | spin_lock_irqsave(&card->card_lock, card->flags); |
5b21f9dd JS |
251 | for (a = 0; a < 10; a++) { |
252 | if (inw(base + 0xe) & 0x1) | |
253 | return 1; | |
254 | udelay(10); | |
1da177e4 | 255 | } |
5b21f9dd JS |
256 | spin_unlock_irqrestore(&card->card_lock, card->flags); |
257 | msleep(10); | |
1da177e4 | 258 | } |
a547dfe9 JS |
259 | printk(KERN_WARNING "ISICOM: Failed to lock Card (0x%lx)\n", |
260 | card->base); | |
261 | ||
0418726b | 262 | return 0; /* Failed to acquire the card! */ |
1da177e4 LT |
263 | } |
264 | ||
1da177e4 LT |
265 | static void unlock_card(struct isi_board *card) |
266 | { | |
267 | spin_unlock_irqrestore(&card->card_lock, card->flags); | |
268 | } | |
269 | ||
270 | /* | |
271 | * ISI Card specific ops ... | |
272 | */ | |
d8d16e47 | 273 | |
cfe7c09a | 274 | /* card->lock HAS to be held */ |
d8d16e47 | 275 | static void raise_dtr(struct isi_port *port) |
1da177e4 | 276 | { |
d8d16e47 | 277 | struct isi_board *card = port->card; |
8070e35c JS |
278 | unsigned long base = card->base; |
279 | u16 channel = port->channel; | |
1da177e4 | 280 | |
cfe7c09a | 281 | if (WaitTillCardIsFree(base)) |
1da177e4 LT |
282 | return; |
283 | ||
d8d16e47 | 284 | outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
1da177e4 LT |
285 | outw(0x0504, base); |
286 | InterruptTheCard(base); | |
287 | port->status |= ISI_DTR; | |
1da177e4 LT |
288 | } |
289 | ||
cfe7c09a | 290 | /* card->lock HAS to be held */ |
d8d16e47 JS |
291 | static inline void drop_dtr(struct isi_port *port) |
292 | { | |
293 | struct isi_board *card = port->card; | |
8070e35c JS |
294 | unsigned long base = card->base; |
295 | u16 channel = port->channel; | |
1da177e4 | 296 | |
cfe7c09a | 297 | if (WaitTillCardIsFree(base)) |
1da177e4 LT |
298 | return; |
299 | ||
d8d16e47 | 300 | outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
1da177e4 | 301 | outw(0x0404, base); |
d8d16e47 | 302 | InterruptTheCard(base); |
1da177e4 | 303 | port->status &= ~ISI_DTR; |
1da177e4 LT |
304 | } |
305 | ||
cfe7c09a | 306 | /* card->lock HAS to be held */ |
d8d16e47 | 307 | static inline void raise_rts(struct isi_port *port) |
1da177e4 | 308 | { |
d8d16e47 | 309 | struct isi_board *card = port->card; |
8070e35c JS |
310 | unsigned long base = card->base; |
311 | u16 channel = port->channel; | |
1da177e4 | 312 | |
cfe7c09a | 313 | if (WaitTillCardIsFree(base)) |
1da177e4 LT |
314 | return; |
315 | ||
d8d16e47 | 316 | outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
1da177e4 | 317 | outw(0x0a04, base); |
d8d16e47 | 318 | InterruptTheCard(base); |
1da177e4 | 319 | port->status |= ISI_RTS; |
1da177e4 | 320 | } |
cfe7c09a JS |
321 | |
322 | /* card->lock HAS to be held */ | |
d8d16e47 | 323 | static inline void drop_rts(struct isi_port *port) |
1da177e4 | 324 | { |
d8d16e47 | 325 | struct isi_board *card = port->card; |
8070e35c JS |
326 | unsigned long base = card->base; |
327 | u16 channel = port->channel; | |
1da177e4 | 328 | |
cfe7c09a | 329 | if (WaitTillCardIsFree(base)) |
1da177e4 LT |
330 | return; |
331 | ||
d8d16e47 | 332 | outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
1da177e4 | 333 | outw(0x0804, base); |
d8d16e47 | 334 | InterruptTheCard(base); |
1da177e4 | 335 | port->status &= ~ISI_RTS; |
1da177e4 LT |
336 | } |
337 | ||
cfe7c09a | 338 | /* card->lock MUST NOT be held */ |
d8d16e47 | 339 | static inline void raise_dtr_rts(struct isi_port *port) |
1da177e4 | 340 | { |
d8d16e47 | 341 | struct isi_board *card = port->card; |
8070e35c JS |
342 | unsigned long base = card->base; |
343 | u16 channel = port->channel; | |
1da177e4 LT |
344 | |
345 | if (!lock_card(card)) | |
346 | return; | |
347 | ||
d8d16e47 | 348 | outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
1da177e4 LT |
349 | outw(0x0f04, base); |
350 | InterruptTheCard(base); | |
351 | port->status |= (ISI_DTR | ISI_RTS); | |
352 | unlock_card(card); | |
353 | } | |
354 | ||
cfe7c09a | 355 | /* card->lock HAS to be held */ |
d8d16e47 | 356 | static void drop_dtr_rts(struct isi_port *port) |
1da177e4 | 357 | { |
d8d16e47 | 358 | struct isi_board *card = port->card; |
8070e35c JS |
359 | unsigned long base = card->base; |
360 | u16 channel = port->channel; | |
1da177e4 | 361 | |
cfe7c09a | 362 | if (WaitTillCardIsFree(base)) |
1da177e4 LT |
363 | return; |
364 | ||
d8d16e47 | 365 | outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
1da177e4 | 366 | outw(0x0c04, base); |
d8d16e47 | 367 | InterruptTheCard(base); |
1da177e4 | 368 | port->status &= ~(ISI_RTS | ISI_DTR); |
1da177e4 LT |
369 | } |
370 | ||
1da177e4 LT |
371 | /* |
372 | * ISICOM Driver specific routines ... | |
373 | * | |
374 | */ | |
d8d16e47 | 375 | |
aaa246ea JS |
376 | static inline int __isicom_paranoia_check(struct isi_port const *port, |
377 | char *name, const char *routine) | |
1da177e4 | 378 | { |
1da177e4 | 379 | if (!port) { |
aaa246ea JS |
380 | printk(KERN_WARNING "ISICOM: Warning: bad isicom magic for " |
381 | "dev %s in %s.\n", name, routine); | |
1da177e4 LT |
382 | return 1; |
383 | } | |
384 | if (port->magic != ISICOM_MAGIC) { | |
aaa246ea JS |
385 | printk(KERN_WARNING "ISICOM: Warning: NULL isicom port for " |
386 | "dev %s in %s.\n", name, routine); | |
1da177e4 | 387 | return 1; |
d8d16e47 | 388 | } |
aaa246ea | 389 | |
1da177e4 LT |
390 | return 0; |
391 | } | |
d8d16e47 | 392 | |
1da177e4 | 393 | /* |
d8d16e47 | 394 | * Transmitter. |
1da177e4 LT |
395 | * |
396 | * We shovel data into the card buffers on a regular basis. The card | |
397 | * will do the rest of the work for us. | |
398 | */ | |
399 | ||
400 | static void isicom_tx(unsigned long _data) | |
401 | { | |
5b21f9dd JS |
402 | unsigned long flags; |
403 | unsigned int retries; | |
1da177e4 LT |
404 | short count = (BOARD_COUNT-1), card, base; |
405 | short txcount, wrd, residue, word_count, cnt; | |
d8d16e47 JS |
406 | struct isi_port *port; |
407 | struct tty_struct *tty; | |
408 | ||
1da177e4 LT |
409 | /* find next active board */ |
410 | card = (prev_card + 1) & 0x0003; | |
411 | while(count-- > 0) { | |
d8d16e47 | 412 | if (isi_card[card].status & BOARD_ACTIVE) |
1da177e4 | 413 | break; |
d8d16e47 | 414 | card = (card + 1) & 0x0003; |
1da177e4 LT |
415 | } |
416 | if (!(isi_card[card].status & BOARD_ACTIVE)) | |
417 | goto sched_again; | |
d8d16e47 | 418 | |
1da177e4 | 419 | prev_card = card; |
d8d16e47 | 420 | |
1da177e4 LT |
421 | count = isi_card[card].port_count; |
422 | port = isi_card[card].ports; | |
423 | base = isi_card[card].base; | |
5b21f9dd JS |
424 | |
425 | spin_lock_irqsave(&isi_card[card].card_lock, flags); | |
426 | for (retries = 0; retries < 100; retries++) { | |
427 | if (inw(base + 0xe) & 0x1) | |
428 | break; | |
429 | udelay(2); | |
430 | } | |
431 | if (retries >= 100) | |
432 | goto unlock; | |
433 | ||
1da177e4 | 434 | for (;count > 0;count--, port++) { |
1da177e4 LT |
435 | /* port not active or tx disabled to force flow control */ |
436 | if (!(port->flags & ASYNC_INITIALIZED) || | |
d8d16e47 | 437 | !(port->status & ISI_TXOK)) |
1da177e4 | 438 | continue; |
d8d16e47 | 439 | |
1da177e4 | 440 | tty = port->tty; |
d8d16e47 | 441 | |
5b21f9dd | 442 | if (tty == NULL) |
1da177e4 | 443 | continue; |
d8d16e47 | 444 | |
1da177e4 | 445 | txcount = min_t(short, TX_SIZE, port->xmit_cnt); |
5b21f9dd | 446 | if (txcount <= 0 || tty->stopped || tty->hw_stopped) |
1da177e4 | 447 | continue; |
5b21f9dd JS |
448 | |
449 | if (!(inw(base + 0x02) & (1 << port->channel))) | |
d8d16e47 | 450 | continue; |
5b21f9dd | 451 | |
aaa246ea JS |
452 | pr_dbg("txing %d bytes, port%d.\n", txcount, |
453 | port->channel + 1); | |
454 | outw((port->channel << isi_card[card].shift_count) | txcount, | |
455 | base); | |
1da177e4 | 456 | residue = NO; |
d8d16e47 | 457 | wrd = 0; |
1da177e4 | 458 | while (1) { |
a547dfe9 JS |
459 | cnt = min_t(int, txcount, (SERIAL_XMIT_SIZE |
460 | - port->xmit_tail)); | |
1da177e4 LT |
461 | if (residue == YES) { |
462 | residue = NO; | |
463 | if (cnt > 0) { | |
a547dfe9 JS |
464 | wrd |= (port->xmit_buf[port->xmit_tail] |
465 | << 8); | |
466 | port->xmit_tail = (port->xmit_tail + 1) | |
467 | & (SERIAL_XMIT_SIZE - 1); | |
1da177e4 LT |
468 | port->xmit_cnt--; |
469 | txcount--; | |
470 | cnt--; | |
d8d16e47 | 471 | outw(wrd, base); |
a547dfe9 | 472 | } else { |
1da177e4 LT |
473 | outw(wrd, base); |
474 | break; | |
475 | } | |
d8d16e47 | 476 | } |
1da177e4 LT |
477 | if (cnt <= 0) break; |
478 | word_count = cnt >> 1; | |
a547dfe9 JS |
479 | outsw(base, port->xmit_buf+port->xmit_tail,word_count); |
480 | port->xmit_tail = (port->xmit_tail | |
481 | + (word_count << 1)) & (SERIAL_XMIT_SIZE - 1); | |
1da177e4 LT |
482 | txcount -= (word_count << 1); |
483 | port->xmit_cnt -= (word_count << 1); | |
484 | if (cnt & 0x0001) { | |
485 | residue = YES; | |
486 | wrd = port->xmit_buf[port->xmit_tail]; | |
a547dfe9 JS |
487 | port->xmit_tail = (port->xmit_tail + 1) |
488 | & (SERIAL_XMIT_SIZE - 1); | |
1da177e4 LT |
489 | port->xmit_cnt--; |
490 | txcount--; | |
491 | } | |
492 | } | |
493 | ||
494 | InterruptTheCard(base); | |
495 | if (port->xmit_cnt <= 0) | |
496 | port->status &= ~ISI_TXOK; | |
497 | if (port->xmit_cnt <= WAKEUP_CHARS) | |
0aa5de85 | 498 | tty_wakeup(tty); |
d8d16e47 | 499 | } |
1da177e4 | 500 | |
5b21f9dd JS |
501 | unlock: |
502 | spin_unlock_irqrestore(&isi_card[card].card_lock, flags); | |
d8d16e47 JS |
503 | /* schedule another tx for hopefully in about 10ms */ |
504 | sched_again: | |
aaa246ea | 505 | if (!re_schedule) { |
906cdecb | 506 | complete(&isi_timerdone); |
aaa246ea JS |
507 | return; |
508 | } | |
509 | ||
34b55b86 | 510 | mod_timer(&tx, jiffies + msecs_to_jiffies(10)); |
d8d16e47 JS |
511 | } |
512 | ||
1da177e4 | 513 | /* |
d8d16e47 | 514 | * Main interrupt handler routine |
1da177e4 | 515 | */ |
d8d16e47 | 516 | |
7d12e780 | 517 | static irqreturn_t isicom_interrupt(int irq, void *dev_id) |
1da177e4 | 518 | { |
8070e35c | 519 | struct isi_board *card = dev_id; |
d8d16e47 JS |
520 | struct isi_port *port; |
521 | struct tty_struct *tty; | |
8070e35c JS |
522 | unsigned long base; |
523 | u16 header, word_count, count, channel; | |
1da177e4 | 524 | short byte_count; |
33f0f88f | 525 | unsigned char *rp; |
d8d16e47 | 526 | |
1da177e4 LT |
527 | if (!card || !(card->status & FIRMWARE_LOADED)) |
528 | return IRQ_NONE; | |
d8d16e47 | 529 | |
1da177e4 | 530 | base = card->base; |
cb4a10cc JS |
531 | |
532 | /* did the card interrupt us? */ | |
533 | if (!(inw(base + 0x0e) & 0x02)) | |
534 | return IRQ_NONE; | |
535 | ||
1da177e4 | 536 | spin_lock(&card->card_lock); |
d8d16e47 | 537 | |
18234f88 JS |
538 | /* |
539 | * disable any interrupts from the PCI card and lower the | |
540 | * interrupt line | |
541 | */ | |
542 | outw(0x8000, base+0x04); | |
543 | ClearInterrupt(base); | |
d8d16e47 | 544 | |
1da177e4 LT |
545 | inw(base); /* get the dummy word out */ |
546 | header = inw(base); | |
547 | channel = (header & 0x7800) >> card->shift_count; | |
548 | byte_count = header & 0xff; | |
549 | ||
550 | if (channel + 1 > card->port_count) { | |
a547dfe9 JS |
551 | printk(KERN_WARNING "ISICOM: isicom_interrupt(0x%lx): " |
552 | "%d(channel) > port_count.\n", base, channel+1); | |
18234f88 | 553 | outw(0x0000, base+0x04); /* enable interrupts */ |
1da177e4 | 554 | spin_unlock(&card->card_lock); |
d8d16e47 | 555 | return IRQ_HANDLED; |
1da177e4 LT |
556 | } |
557 | port = card->ports + channel; | |
558 | if (!(port->flags & ASYNC_INITIALIZED)) { | |
18234f88 | 559 | outw(0x0000, base+0x04); /* enable interrupts */ |
174f1307 | 560 | spin_unlock(&card->card_lock); |
1da177e4 | 561 | return IRQ_HANDLED; |
d8d16e47 JS |
562 | } |
563 | ||
1da177e4 LT |
564 | tty = port->tty; |
565 | if (tty == NULL) { | |
566 | word_count = byte_count >> 1; | |
567 | while(byte_count > 1) { | |
568 | inw(base); | |
569 | byte_count -= 2; | |
570 | } | |
571 | if (byte_count & 0x01) | |
572 | inw(base); | |
18234f88 | 573 | outw(0x0000, base+0x04); /* enable interrupts */ |
1da177e4 LT |
574 | spin_unlock(&card->card_lock); |
575 | return IRQ_HANDLED; | |
576 | } | |
d8d16e47 | 577 | |
1da177e4 LT |
578 | if (header & 0x8000) { /* Status Packet */ |
579 | header = inw(base); | |
580 | switch(header & 0xff) { | |
d8d16e47 | 581 | case 0: /* Change in EIA signals */ |
d8d16e47 JS |
582 | if (port->flags & ASYNC_CHECK_CD) { |
583 | if (port->status & ISI_DCD) { | |
584 | if (!(header & ISI_DCD)) { | |
585 | /* Carrier has been lost */ | |
a547dfe9 JS |
586 | pr_dbg("interrupt: DCD->low.\n" |
587 | ); | |
d8d16e47 | 588 | port->status &= ~ISI_DCD; |
0aa5de85 | 589 | tty_hangup(tty); |
1da177e4 | 590 | } |
a547dfe9 JS |
591 | } else if (header & ISI_DCD) { |
592 | /* Carrier has been detected */ | |
593 | pr_dbg("interrupt: DCD->high.\n"); | |
594 | port->status |= ISI_DCD; | |
595 | wake_up_interruptible(&port->open_wait); | |
1da177e4 | 596 | } |
a547dfe9 | 597 | } else { |
d8d16e47 JS |
598 | if (header & ISI_DCD) |
599 | port->status |= ISI_DCD; | |
600 | else | |
601 | port->status &= ~ISI_DCD; | |
602 | } | |
603 | ||
604 | if (port->flags & ASYNC_CTS_FLOW) { | |
605 | if (port->tty->hw_stopped) { | |
606 | if (header & ISI_CTS) { | |
607 | port->tty->hw_stopped = 0; | |
608 | /* start tx ing */ | |
a547dfe9 JS |
609 | port->status |= (ISI_TXOK |
610 | | ISI_CTS); | |
0aa5de85 | 611 | tty_wakeup(tty); |
1da177e4 | 612 | } |
a547dfe9 JS |
613 | } else if (!(header & ISI_CTS)) { |
614 | port->tty->hw_stopped = 1; | |
615 | /* stop tx ing */ | |
616 | port->status &= ~(ISI_TXOK | ISI_CTS); | |
1da177e4 | 617 | } |
a547dfe9 | 618 | } else { |
d8d16e47 JS |
619 | if (header & ISI_CTS) |
620 | port->status |= ISI_CTS; | |
1da177e4 | 621 | else |
d8d16e47 JS |
622 | port->status &= ~ISI_CTS; |
623 | } | |
624 | ||
625 | if (header & ISI_DSR) | |
626 | port->status |= ISI_DSR; | |
627 | else | |
628 | port->status &= ~ISI_DSR; | |
629 | ||
630 | if (header & ISI_RI) | |
631 | port->status |= ISI_RI; | |
632 | else | |
633 | port->status &= ~ISI_RI; | |
634 | ||
635 | break; | |
636 | ||
a547dfe9 | 637 | case 1: /* Received Break !!! */ |
d8d16e47 JS |
638 | tty_insert_flip_char(tty, 0, TTY_BREAK); |
639 | if (port->flags & ASYNC_SAK) | |
640 | do_SAK(tty); | |
641 | tty_flip_buffer_push(tty); | |
642 | break; | |
643 | ||
644 | case 2: /* Statistics */ | |
aaa246ea | 645 | pr_dbg("isicom_interrupt: stats!!!.\n"); |
d8d16e47 JS |
646 | break; |
647 | ||
648 | default: | |
aaa246ea | 649 | pr_dbg("Intr: Unknown code in status packet.\n"); |
d8d16e47 JS |
650 | break; |
651 | } | |
a547dfe9 | 652 | } else { /* Data Packet */ |
33f0f88f AC |
653 | |
654 | count = tty_prepare_flip_string(tty, &rp, byte_count & ~1); | |
aaa246ea | 655 | pr_dbg("Intr: Can rx %d of %d bytes.\n", count, byte_count); |
1da177e4 | 656 | word_count = count >> 1; |
33f0f88f | 657 | insw(base, rp, word_count); |
1da177e4 LT |
658 | byte_count -= (word_count << 1); |
659 | if (count & 0x0001) { | |
a547dfe9 JS |
660 | tty_insert_flip_char(tty, inw(base) & 0xff, |
661 | TTY_NORMAL); | |
1da177e4 | 662 | byte_count -= 2; |
d8d16e47 | 663 | } |
1da177e4 | 664 | if (byte_count > 0) { |
aaa246ea JS |
665 | pr_dbg("Intr(0x%lx:%d): Flip buffer overflow! dropping " |
666 | "bytes...\n", base, channel + 1); | |
1da177e4 LT |
667 | while(byte_count > 0) { /* drain out unread xtra data */ |
668 | inw(base); | |
669 | byte_count -= 2; | |
670 | } | |
671 | } | |
33f0f88f | 672 | tty_flip_buffer_push(tty); |
1da177e4 | 673 | } |
18234f88 | 674 | outw(0x0000, base+0x04); /* enable interrupts */ |
174f1307 | 675 | spin_unlock(&card->card_lock); |
a547dfe9 | 676 | |
1da177e4 | 677 | return IRQ_HANDLED; |
d8d16e47 | 678 | } |
1da177e4 | 679 | |
d8d16e47 | 680 | static void isicom_config_port(struct isi_port *port) |
1da177e4 | 681 | { |
d8d16e47 JS |
682 | struct isi_board *card = port->card; |
683 | struct tty_struct *tty; | |
1da177e4 | 684 | unsigned long baud; |
8070e35c JS |
685 | unsigned long base = card->base; |
686 | u16 channel_setup, channel = port->channel, | |
687 | shift_count = card->shift_count; | |
1da177e4 | 688 | unsigned char flow_ctrl; |
d8d16e47 | 689 | |
1da177e4 LT |
690 | if (!(tty = port->tty) || !tty->termios) |
691 | return; | |
692 | baud = C_BAUD(tty); | |
693 | if (baud & CBAUDEX) { | |
694 | baud &= ~CBAUDEX; | |
d8d16e47 | 695 | |
1da177e4 LT |
696 | /* if CBAUDEX bit is on and the baud is set to either 50 or 75 |
697 | * then the card is programmed for 57.6Kbps or 115Kbps | |
698 | * respectively. | |
d8d16e47 JS |
699 | */ |
700 | ||
7edc136a JS |
701 | /* 1,2,3,4 => 57.6, 115.2, 230, 460 kbps resp. */ |
702 | if (baud < 1 || baud > 4) | |
1da177e4 LT |
703 | port->tty->termios->c_cflag &= ~CBAUDEX; |
704 | else | |
705 | baud += 15; | |
d8d16e47 | 706 | } |
1da177e4 | 707 | if (baud == 15) { |
d8d16e47 JS |
708 | |
709 | /* the ASYNC_SPD_HI and ASYNC_SPD_VHI options are set | |
1da177e4 LT |
710 | * by the set_serial_info ioctl ... this is done by |
711 | * the 'setserial' utility. | |
d8d16e47 JS |
712 | */ |
713 | ||
1da177e4 | 714 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) |
d8d16e47 | 715 | baud++; /* 57.6 Kbps */ |
1da177e4 | 716 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) |
d8d16e47 | 717 | baud +=2; /* 115 Kbps */ |
7edc136a JS |
718 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) |
719 | baud += 3; /* 230 kbps*/ | |
720 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) | |
721 | baud += 4; /* 460 kbps*/ | |
1da177e4 LT |
722 | } |
723 | if (linuxb_to_isib[baud] == -1) { | |
724 | /* hang up */ | |
d8d16e47 JS |
725 | drop_dtr(port); |
726 | return; | |
727 | } | |
728 | else | |
1da177e4 | 729 | raise_dtr(port); |
d8d16e47 | 730 | |
cfe7c09a | 731 | if (WaitTillCardIsFree(base) == 0) { |
1da177e4 LT |
732 | outw(0x8000 | (channel << shift_count) |0x03, base); |
733 | outw(linuxb_to_isib[baud] << 8 | 0x03, base); | |
734 | channel_setup = 0; | |
735 | switch(C_CSIZE(tty)) { | |
d8d16e47 JS |
736 | case CS5: |
737 | channel_setup |= ISICOM_CS5; | |
738 | break; | |
739 | case CS6: | |
740 | channel_setup |= ISICOM_CS6; | |
741 | break; | |
742 | case CS7: | |
743 | channel_setup |= ISICOM_CS7; | |
744 | break; | |
745 | case CS8: | |
746 | channel_setup |= ISICOM_CS8; | |
747 | break; | |
1da177e4 | 748 | } |
d8d16e47 | 749 | |
1da177e4 LT |
750 | if (C_CSTOPB(tty)) |
751 | channel_setup |= ISICOM_2SB; | |
752 | if (C_PARENB(tty)) { | |
753 | channel_setup |= ISICOM_EVPAR; | |
754 | if (C_PARODD(tty)) | |
d8d16e47 | 755 | channel_setup |= ISICOM_ODPAR; |
1da177e4 | 756 | } |
d8d16e47 | 757 | outw(channel_setup, base); |
1da177e4 | 758 | InterruptTheCard(base); |
d8d16e47 | 759 | } |
1da177e4 LT |
760 | if (C_CLOCAL(tty)) |
761 | port->flags &= ~ASYNC_CHECK_CD; | |
762 | else | |
d8d16e47 JS |
763 | port->flags |= ASYNC_CHECK_CD; |
764 | ||
1da177e4 LT |
765 | /* flow control settings ...*/ |
766 | flow_ctrl = 0; | |
767 | port->flags &= ~ASYNC_CTS_FLOW; | |
768 | if (C_CRTSCTS(tty)) { | |
769 | port->flags |= ASYNC_CTS_FLOW; | |
770 | flow_ctrl |= ISICOM_CTSRTS; | |
d8d16e47 JS |
771 | } |
772 | if (I_IXON(tty)) | |
1da177e4 LT |
773 | flow_ctrl |= ISICOM_RESPOND_XONXOFF; |
774 | if (I_IXOFF(tty)) | |
d8d16e47 JS |
775 | flow_ctrl |= ISICOM_INITIATE_XONXOFF; |
776 | ||
cfe7c09a | 777 | if (WaitTillCardIsFree(base) == 0) { |
1da177e4 LT |
778 | outw(0x8000 | (channel << shift_count) |0x04, base); |
779 | outw(flow_ctrl << 8 | 0x05, base); | |
780 | outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base); | |
781 | InterruptTheCard(base); | |
1da177e4 | 782 | } |
d8d16e47 | 783 | |
1da177e4 LT |
784 | /* rx enabled -> enable port for rx on the card */ |
785 | if (C_CREAD(tty)) { | |
786 | card->port_status |= (1 << channel); | |
787 | outw(card->port_status, base + 0x02); | |
788 | } | |
789 | } | |
1da177e4 | 790 | |
d8d16e47 JS |
791 | /* open et all */ |
792 | ||
793 | static inline void isicom_setup_board(struct isi_board *bp) | |
1da177e4 LT |
794 | { |
795 | int channel; | |
d8d16e47 | 796 | struct isi_port *port; |
1da177e4 | 797 | unsigned long flags; |
d8d16e47 | 798 | |
1da177e4 LT |
799 | spin_lock_irqsave(&bp->card_lock, flags); |
800 | if (bp->status & BOARD_ACTIVE) { | |
801 | spin_unlock_irqrestore(&bp->card_lock, flags); | |
802 | return; | |
803 | } | |
804 | port = bp->ports; | |
805 | bp->status |= BOARD_ACTIVE; | |
d8d16e47 | 806 | for (channel = 0; channel < bp->port_count; channel++, port++) |
1da177e4 | 807 | drop_dtr_rts(port); |
cfe7c09a | 808 | spin_unlock_irqrestore(&bp->card_lock, flags); |
1da177e4 | 809 | } |
d8d16e47 JS |
810 | |
811 | static int isicom_setup_port(struct isi_port *port) | |
1da177e4 | 812 | { |
d8d16e47 | 813 | struct isi_board *card = port->card; |
1da177e4 | 814 | unsigned long flags; |
d8d16e47 | 815 | |
1da177e4 LT |
816 | if (port->flags & ASYNC_INITIALIZED) { |
817 | return 0; | |
818 | } | |
819 | if (!port->xmit_buf) { | |
820 | unsigned long page; | |
d8d16e47 | 821 | |
1da177e4 LT |
822 | if (!(page = get_zeroed_page(GFP_KERNEL))) |
823 | return -ENOMEM; | |
d8d16e47 | 824 | |
1da177e4 LT |
825 | if (port->xmit_buf) { |
826 | free_page(page); | |
827 | return -ERESTARTSYS; | |
828 | } | |
d8d16e47 JS |
829 | port->xmit_buf = (unsigned char *) page; |
830 | } | |
1da177e4 LT |
831 | |
832 | spin_lock_irqsave(&card->card_lock, flags); | |
833 | if (port->tty) | |
834 | clear_bit(TTY_IO_ERROR, &port->tty->flags); | |
835 | if (port->count == 1) | |
836 | card->count++; | |
d8d16e47 | 837 | |
1da177e4 | 838 | port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; |
d8d16e47 | 839 | |
1da177e4 | 840 | /* discard any residual data */ |
cfe7c09a JS |
841 | if (WaitTillCardIsFree(card->base) == 0) { |
842 | outw(0x8000 | (port->channel << card->shift_count) | 0x02, | |
843 | card->base); | |
844 | outw(((ISICOM_KILLTX | ISICOM_KILLRX) << 8) | 0x06, card->base); | |
845 | InterruptTheCard(card->base); | |
846 | } | |
d8d16e47 | 847 | |
1da177e4 LT |
848 | isicom_config_port(port); |
849 | port->flags |= ASYNC_INITIALIZED; | |
850 | spin_unlock_irqrestore(&card->card_lock, flags); | |
d8d16e47 JS |
851 | |
852 | return 0; | |
853 | } | |
854 | ||
a547dfe9 JS |
855 | static int block_til_ready(struct tty_struct *tty, struct file *filp, |
856 | struct isi_port *port) | |
1da177e4 | 857 | { |
d8d16e47 | 858 | struct isi_board *card = port->card; |
1da177e4 LT |
859 | int do_clocal = 0, retval; |
860 | unsigned long flags; | |
861 | DECLARE_WAITQUEUE(wait, current); | |
862 | ||
863 | /* block if port is in the process of being closed */ | |
864 | ||
865 | if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) { | |
aaa246ea | 866 | pr_dbg("block_til_ready: close in progress.\n"); |
1da177e4 LT |
867 | interruptible_sleep_on(&port->close_wait); |
868 | if (port->flags & ASYNC_HUP_NOTIFY) | |
869 | return -EAGAIN; | |
870 | else | |
871 | return -ERESTARTSYS; | |
872 | } | |
d8d16e47 | 873 | |
1da177e4 | 874 | /* if non-blocking mode is set ... */ |
d8d16e47 | 875 | |
a547dfe9 JS |
876 | if ((filp->f_flags & O_NONBLOCK) || |
877 | (tty->flags & (1 << TTY_IO_ERROR))) { | |
aaa246ea | 878 | pr_dbg("block_til_ready: non-block mode.\n"); |
1da177e4 | 879 | port->flags |= ASYNC_NORMAL_ACTIVE; |
d8d16e47 JS |
880 | return 0; |
881 | } | |
882 | ||
1da177e4 LT |
883 | if (C_CLOCAL(tty)) |
884 | do_clocal = 1; | |
d8d16e47 JS |
885 | |
886 | /* block waiting for DCD to be asserted, and while | |
1da177e4 LT |
887 | callout dev is busy */ |
888 | retval = 0; | |
889 | add_wait_queue(&port->open_wait, &wait); | |
890 | ||
891 | spin_lock_irqsave(&card->card_lock, flags); | |
892 | if (!tty_hung_up_p(filp)) | |
893 | port->count--; | |
894 | port->blocked_open++; | |
895 | spin_unlock_irqrestore(&card->card_lock, flags); | |
d8d16e47 | 896 | |
1da177e4 LT |
897 | while (1) { |
898 | raise_dtr_rts(port); | |
899 | ||
900 | set_current_state(TASK_INTERRUPTIBLE); | |
d8d16e47 | 901 | if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) { |
1da177e4 LT |
902 | if (port->flags & ASYNC_HUP_NOTIFY) |
903 | retval = -EAGAIN; | |
904 | else | |
905 | retval = -ERESTARTSYS; | |
906 | break; | |
d8d16e47 | 907 | } |
1da177e4 | 908 | if (!(port->flags & ASYNC_CLOSING) && |
d8d16e47 | 909 | (do_clocal || (port->status & ISI_DCD))) { |
1da177e4 | 910 | break; |
d8d16e47 | 911 | } |
1da177e4 LT |
912 | if (signal_pending(current)) { |
913 | retval = -ERESTARTSYS; | |
914 | break; | |
915 | } | |
d8d16e47 | 916 | schedule(); |
1da177e4 LT |
917 | } |
918 | set_current_state(TASK_RUNNING); | |
919 | remove_wait_queue(&port->open_wait, &wait); | |
920 | spin_lock_irqsave(&card->card_lock, flags); | |
921 | if (!tty_hung_up_p(filp)) | |
922 | port->count++; | |
923 | port->blocked_open--; | |
924 | spin_unlock_irqrestore(&card->card_lock, flags); | |
925 | if (retval) | |
926 | return retval; | |
927 | port->flags |= ASYNC_NORMAL_ACTIVE; | |
928 | return 0; | |
929 | } | |
d8d16e47 JS |
930 | |
931 | static int isicom_open(struct tty_struct *tty, struct file *filp) | |
1da177e4 | 932 | { |
d8d16e47 JS |
933 | struct isi_port *port; |
934 | struct isi_board *card; | |
17c4edf0 JS |
935 | unsigned int board; |
936 | int error, line; | |
1da177e4 LT |
937 | |
938 | line = tty->index; | |
939 | if (line < 0 || line > PORT_COUNT-1) | |
940 | return -ENODEV; | |
941 | board = BOARD(line); | |
942 | card = &isi_card[board]; | |
d8d16e47 | 943 | |
1da177e4 LT |
944 | if (!(card->status & FIRMWARE_LOADED)) |
945 | return -ENODEV; | |
d8d16e47 | 946 | |
1da177e4 LT |
947 | /* open on a port greater than the port count for the card !!! */ |
948 | if (line > ((board * 16) + card->port_count - 1)) | |
949 | return -ENODEV; | |
950 | ||
d8d16e47 | 951 | port = &isi_ports[line]; |
1da177e4 LT |
952 | if (isicom_paranoia_check(port, tty->name, "isicom_open")) |
953 | return -ENODEV; | |
d8d16e47 JS |
954 | |
955 | isicom_setup_board(card); | |
956 | ||
1da177e4 LT |
957 | port->count++; |
958 | tty->driver_data = port; | |
959 | port->tty = tty; | |
960 | if ((error = isicom_setup_port(port))!=0) | |
961 | return error; | |
962 | if ((error = block_til_ready(tty, filp, port))!=0) | |
963 | return error; | |
964 | ||
d8d16e47 | 965 | return 0; |
1da177e4 | 966 | } |
d8d16e47 | 967 | |
1da177e4 LT |
968 | /* close et all */ |
969 | ||
d8d16e47 | 970 | static inline void isicom_shutdown_board(struct isi_board *bp) |
1da177e4 | 971 | { |
1da177e4 LT |
972 | if (bp->status & BOARD_ACTIVE) { |
973 | bp->status &= ~BOARD_ACTIVE; | |
974 | } | |
1da177e4 LT |
975 | } |
976 | ||
cfe7c09a | 977 | /* card->lock HAS to be held */ |
d8d16e47 | 978 | static void isicom_shutdown_port(struct isi_port *port) |
1da177e4 | 979 | { |
d8d16e47 JS |
980 | struct isi_board *card = port->card; |
981 | struct tty_struct *tty; | |
d8d16e47 | 982 | |
1da177e4 LT |
983 | tty = port->tty; |
984 | ||
cfe7c09a | 985 | if (!(port->flags & ASYNC_INITIALIZED)) |
1da177e4 | 986 | return; |
cfe7c09a | 987 | |
1da177e4 LT |
988 | if (port->xmit_buf) { |
989 | free_page((unsigned long) port->xmit_buf); | |
990 | port->xmit_buf = NULL; | |
d8d16e47 | 991 | } |
1da177e4 LT |
992 | port->flags &= ~ASYNC_INITIALIZED; |
993 | /* 3rd October 2000 : Vinayak P Risbud */ | |
994 | port->tty = NULL; | |
d8d16e47 | 995 | |
1da177e4 LT |
996 | /*Fix done by Anil .S on 30-04-2001 |
997 | remote login through isi port has dtr toggle problem | |
998 | due to which the carrier drops before the password prompt | |
d8d16e47 | 999 | appears on the remote end. Now we drop the dtr only if the |
1da177e4 | 1000 | HUPCL(Hangup on close) flag is set for the tty*/ |
d8d16e47 JS |
1001 | |
1002 | if (C_HUPCL(tty)) | |
1da177e4 LT |
1003 | /* drop dtr on this port */ |
1004 | drop_dtr(port); | |
d8d16e47 JS |
1005 | |
1006 | /* any other port uninits */ | |
1da177e4 LT |
1007 | if (tty) |
1008 | set_bit(TTY_IO_ERROR, &tty->flags); | |
d8d16e47 | 1009 | |
1da177e4 | 1010 | if (--card->count < 0) { |
aaa246ea | 1011 | pr_dbg("isicom_shutdown_port: bad board(0x%lx) count %d.\n", |
1da177e4 | 1012 | card->base, card->count); |
d8d16e47 | 1013 | card->count = 0; |
1da177e4 | 1014 | } |
d8d16e47 | 1015 | |
a547dfe9 | 1016 | /* last port was closed, shutdown that boad too */ |
d8d16e47 | 1017 | if (C_HUPCL(tty)) { |
1da177e4 LT |
1018 | if (!card->count) |
1019 | isicom_shutdown_board(card); | |
1020 | } | |
1021 | } | |
1022 | ||
d8d16e47 | 1023 | static void isicom_close(struct tty_struct *tty, struct file *filp) |
1da177e4 | 1024 | { |
8070e35c | 1025 | struct isi_port *port = tty->driver_data; |
c387fd85 | 1026 | struct isi_board *card; |
1da177e4 | 1027 | unsigned long flags; |
d8d16e47 | 1028 | |
1da177e4 LT |
1029 | if (!port) |
1030 | return; | |
c387fd85 | 1031 | card = port->card; |
1da177e4 LT |
1032 | if (isicom_paranoia_check(port, tty->name, "isicom_close")) |
1033 | return; | |
d8d16e47 | 1034 | |
aaa246ea | 1035 | pr_dbg("Close start!!!.\n"); |
d8d16e47 | 1036 | |
1da177e4 LT |
1037 | spin_lock_irqsave(&card->card_lock, flags); |
1038 | if (tty_hung_up_p(filp)) { | |
1039 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1040 | return; | |
1041 | } | |
d8d16e47 | 1042 | |
1da177e4 | 1043 | if (tty->count == 1 && port->count != 1) { |
a547dfe9 JS |
1044 | printk(KERN_WARNING "ISICOM:(0x%lx) isicom_close: bad port " |
1045 | "count tty->count = 1 port count = %d.\n", | |
1da177e4 LT |
1046 | card->base, port->count); |
1047 | port->count = 1; | |
1048 | } | |
1049 | if (--port->count < 0) { | |
a547dfe9 JS |
1050 | printk(KERN_WARNING "ISICOM:(0x%lx) isicom_close: bad port " |
1051 | "count for channel%d = %d", card->base, port->channel, | |
1da177e4 | 1052 | port->count); |
d8d16e47 | 1053 | port->count = 0; |
1da177e4 | 1054 | } |
d8d16e47 | 1055 | |
1da177e4 LT |
1056 | if (port->count) { |
1057 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1058 | return; | |
d8d16e47 | 1059 | } |
1da177e4 LT |
1060 | port->flags |= ASYNC_CLOSING; |
1061 | tty->closing = 1; | |
1062 | spin_unlock_irqrestore(&card->card_lock, flags); | |
d8d16e47 | 1063 | |
1da177e4 LT |
1064 | if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE) |
1065 | tty_wait_until_sent(tty, port->closing_wait); | |
d8d16e47 | 1066 | /* indicate to the card that no more data can be received |
1da177e4 LT |
1067 | on this port */ |
1068 | spin_lock_irqsave(&card->card_lock, flags); | |
d8d16e47 | 1069 | if (port->flags & ASYNC_INITIALIZED) { |
1da177e4 LT |
1070 | card->port_status &= ~(1 << port->channel); |
1071 | outw(card->port_status, card->base + 0x02); | |
d8d16e47 | 1072 | } |
1da177e4 LT |
1073 | isicom_shutdown_port(port); |
1074 | spin_unlock_irqrestore(&card->card_lock, flags); | |
d8d16e47 | 1075 | |
1da177e4 LT |
1076 | if (tty->driver->flush_buffer) |
1077 | tty->driver->flush_buffer(tty); | |
1078 | tty_ldisc_flush(tty); | |
1079 | ||
1080 | spin_lock_irqsave(&card->card_lock, flags); | |
1081 | tty->closing = 0; | |
1082 | ||
1083 | if (port->blocked_open) { | |
1084 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1085 | if (port->close_delay) { | |
aaa246ea | 1086 | pr_dbg("scheduling until time out.\n"); |
a547dfe9 JS |
1087 | msleep_interruptible( |
1088 | jiffies_to_msecs(port->close_delay)); | |
1da177e4 LT |
1089 | } |
1090 | spin_lock_irqsave(&card->card_lock, flags); | |
1091 | wake_up_interruptible(&port->open_wait); | |
d8d16e47 | 1092 | } |
1da177e4 LT |
1093 | port->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING); |
1094 | wake_up_interruptible(&port->close_wait); | |
1095 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1096 | } | |
1097 | ||
1098 | /* write et all */ | |
d8d16e47 JS |
1099 | static int isicom_write(struct tty_struct *tty, const unsigned char *buf, |
1100 | int count) | |
1da177e4 | 1101 | { |
8070e35c | 1102 | struct isi_port *port = tty->driver_data; |
d8d16e47 | 1103 | struct isi_board *card = port->card; |
1da177e4 LT |
1104 | unsigned long flags; |
1105 | int cnt, total = 0; | |
1106 | ||
1107 | if (isicom_paranoia_check(port, tty->name, "isicom_write")) | |
1108 | return 0; | |
d8d16e47 | 1109 | |
326f28e9 | 1110 | if (!port->xmit_buf) |
1da177e4 | 1111 | return 0; |
d8d16e47 | 1112 | |
1da177e4 | 1113 | spin_lock_irqsave(&card->card_lock, flags); |
d8d16e47 JS |
1114 | |
1115 | while(1) { | |
a547dfe9 JS |
1116 | cnt = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt |
1117 | - 1, SERIAL_XMIT_SIZE - port->xmit_head)); | |
d8d16e47 | 1118 | if (cnt <= 0) |
1da177e4 | 1119 | break; |
d8d16e47 | 1120 | |
1da177e4 | 1121 | memcpy(port->xmit_buf + port->xmit_head, buf, cnt); |
a547dfe9 JS |
1122 | port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE |
1123 | - 1); | |
1da177e4 LT |
1124 | port->xmit_cnt += cnt; |
1125 | buf += cnt; | |
1126 | count -= cnt; | |
1127 | total += cnt; | |
d8d16e47 | 1128 | } |
1da177e4 LT |
1129 | if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped) |
1130 | port->status |= ISI_TXOK; | |
1131 | spin_unlock_irqrestore(&card->card_lock, flags); | |
d8d16e47 | 1132 | return total; |
1da177e4 LT |
1133 | } |
1134 | ||
1135 | /* put_char et all */ | |
d8d16e47 | 1136 | static void isicom_put_char(struct tty_struct *tty, unsigned char ch) |
1da177e4 | 1137 | { |
8070e35c | 1138 | struct isi_port *port = tty->driver_data; |
d8d16e47 | 1139 | struct isi_board *card = port->card; |
1da177e4 | 1140 | unsigned long flags; |
d8d16e47 | 1141 | |
1da177e4 LT |
1142 | if (isicom_paranoia_check(port, tty->name, "isicom_put_char")) |
1143 | return; | |
d8d16e47 | 1144 | |
326f28e9 | 1145 | if (!port->xmit_buf) |
1da177e4 LT |
1146 | return; |
1147 | ||
1148 | spin_lock_irqsave(&card->card_lock, flags); | |
1149 | if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) { | |
1150 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1151 | return; | |
1152 | } | |
d8d16e47 | 1153 | |
1da177e4 LT |
1154 | port->xmit_buf[port->xmit_head++] = ch; |
1155 | port->xmit_head &= (SERIAL_XMIT_SIZE - 1); | |
1156 | port->xmit_cnt++; | |
1157 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1158 | } | |
1159 | ||
1160 | /* flush_chars et all */ | |
d8d16e47 | 1161 | static void isicom_flush_chars(struct tty_struct *tty) |
1da177e4 | 1162 | { |
8070e35c | 1163 | struct isi_port *port = tty->driver_data; |
d8d16e47 | 1164 | |
1da177e4 LT |
1165 | if (isicom_paranoia_check(port, tty->name, "isicom_flush_chars")) |
1166 | return; | |
d8d16e47 | 1167 | |
a547dfe9 JS |
1168 | if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped || |
1169 | !port->xmit_buf) | |
1da177e4 | 1170 | return; |
d8d16e47 | 1171 | |
1da177e4 LT |
1172 | /* this tells the transmitter to consider this port for |
1173 | data output to the card ... that's the best we can do. */ | |
d8d16e47 | 1174 | port->status |= ISI_TXOK; |
1da177e4 LT |
1175 | } |
1176 | ||
1177 | /* write_room et all */ | |
d8d16e47 | 1178 | static int isicom_write_room(struct tty_struct *tty) |
1da177e4 | 1179 | { |
8070e35c | 1180 | struct isi_port *port = tty->driver_data; |
1da177e4 LT |
1181 | int free; |
1182 | ||
1183 | if (isicom_paranoia_check(port, tty->name, "isicom_write_room")) | |
1184 | return 0; | |
d8d16e47 | 1185 | |
1da177e4 LT |
1186 | free = SERIAL_XMIT_SIZE - port->xmit_cnt - 1; |
1187 | if (free < 0) | |
1188 | free = 0; | |
1189 | return free; | |
1190 | } | |
1191 | ||
1192 | /* chars_in_buffer et all */ | |
d8d16e47 | 1193 | static int isicom_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 1194 | { |
8070e35c | 1195 | struct isi_port *port = tty->driver_data; |
1da177e4 LT |
1196 | if (isicom_paranoia_check(port, tty->name, "isicom_chars_in_buffer")) |
1197 | return 0; | |
1198 | return port->xmit_cnt; | |
1199 | } | |
1200 | ||
1201 | /* ioctl et all */ | |
a547dfe9 JS |
1202 | static inline void isicom_send_break(struct isi_port *port, |
1203 | unsigned long length) | |
1da177e4 | 1204 | { |
d8d16e47 | 1205 | struct isi_board *card = port->card; |
8070e35c | 1206 | unsigned long base = card->base; |
d8d16e47 JS |
1207 | |
1208 | if (!lock_card(card)) | |
1da177e4 | 1209 | return; |
d8d16e47 | 1210 | |
1da177e4 LT |
1211 | outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base); |
1212 | outw((length & 0xff) << 8 | 0x00, base); | |
1213 | outw((length & 0xff00), base); | |
1214 | InterruptTheCard(base); | |
1215 | ||
1216 | unlock_card(card); | |
1217 | } | |
1218 | ||
1219 | static int isicom_tiocmget(struct tty_struct *tty, struct file *file) | |
1220 | { | |
8070e35c | 1221 | struct isi_port *port = tty->driver_data; |
1da177e4 | 1222 | /* just send the port status */ |
8070e35c | 1223 | u16 status = port->status; |
1da177e4 LT |
1224 | |
1225 | if (isicom_paranoia_check(port, tty->name, "isicom_ioctl")) | |
1226 | return -ENODEV; | |
d8d16e47 | 1227 | |
1da177e4 LT |
1228 | return ((status & ISI_RTS) ? TIOCM_RTS : 0) | |
1229 | ((status & ISI_DTR) ? TIOCM_DTR : 0) | | |
1230 | ((status & ISI_DCD) ? TIOCM_CAR : 0) | | |
1231 | ((status & ISI_DSR) ? TIOCM_DSR : 0) | | |
1232 | ((status & ISI_CTS) ? TIOCM_CTS : 0) | | |
1233 | ((status & ISI_RI ) ? TIOCM_RI : 0); | |
1234 | } | |
1235 | ||
1236 | static int isicom_tiocmset(struct tty_struct *tty, struct file *file, | |
d8d16e47 | 1237 | unsigned int set, unsigned int clear) |
1da177e4 | 1238 | { |
8070e35c | 1239 | struct isi_port *port = tty->driver_data; |
cfe7c09a | 1240 | unsigned long flags; |
d8d16e47 | 1241 | |
1da177e4 LT |
1242 | if (isicom_paranoia_check(port, tty->name, "isicom_ioctl")) |
1243 | return -ENODEV; | |
d8d16e47 | 1244 | |
cfe7c09a | 1245 | spin_lock_irqsave(&port->card->card_lock, flags); |
1da177e4 LT |
1246 | if (set & TIOCM_RTS) |
1247 | raise_rts(port); | |
1248 | if (set & TIOCM_DTR) | |
1249 | raise_dtr(port); | |
1250 | ||
1251 | if (clear & TIOCM_RTS) | |
1252 | drop_rts(port); | |
1253 | if (clear & TIOCM_DTR) | |
1254 | drop_dtr(port); | |
cfe7c09a | 1255 | spin_unlock_irqrestore(&port->card->card_lock, flags); |
1da177e4 LT |
1256 | |
1257 | return 0; | |
d8d16e47 | 1258 | } |
1da177e4 | 1259 | |
d8d16e47 JS |
1260 | static int isicom_set_serial_info(struct isi_port *port, |
1261 | struct serial_struct __user *info) | |
1da177e4 LT |
1262 | { |
1263 | struct serial_struct newinfo; | |
1264 | int reconfig_port; | |
1265 | ||
d8d16e47 | 1266 | if (copy_from_user(&newinfo, info, sizeof(newinfo))) |
1da177e4 | 1267 | return -EFAULT; |
d8d16e47 JS |
1268 | |
1269 | reconfig_port = ((port->flags & ASYNC_SPD_MASK) != | |
1270 | (newinfo.flags & ASYNC_SPD_MASK)); | |
1271 | ||
1da177e4 LT |
1272 | if (!capable(CAP_SYS_ADMIN)) { |
1273 | if ((newinfo.close_delay != port->close_delay) || | |
d8d16e47 JS |
1274 | (newinfo.closing_wait != port->closing_wait) || |
1275 | ((newinfo.flags & ~ASYNC_USR_MASK) != | |
1276 | (port->flags & ~ASYNC_USR_MASK))) | |
1da177e4 LT |
1277 | return -EPERM; |
1278 | port->flags = ((port->flags & ~ ASYNC_USR_MASK) | | |
1279 | (newinfo.flags & ASYNC_USR_MASK)); | |
d8d16e47 | 1280 | } |
1da177e4 LT |
1281 | else { |
1282 | port->close_delay = newinfo.close_delay; | |
d8d16e47 JS |
1283 | port->closing_wait = newinfo.closing_wait; |
1284 | port->flags = ((port->flags & ~ASYNC_FLAGS) | | |
1da177e4 LT |
1285 | (newinfo.flags & ASYNC_FLAGS)); |
1286 | } | |
1287 | if (reconfig_port) { | |
cfe7c09a JS |
1288 | unsigned long flags; |
1289 | spin_lock_irqsave(&port->card->card_lock, flags); | |
1da177e4 | 1290 | isicom_config_port(port); |
cfe7c09a | 1291 | spin_unlock_irqrestore(&port->card->card_lock, flags); |
1da177e4 | 1292 | } |
d8d16e47 JS |
1293 | return 0; |
1294 | } | |
1da177e4 | 1295 | |
d8d16e47 JS |
1296 | static int isicom_get_serial_info(struct isi_port *port, |
1297 | struct serial_struct __user *info) | |
1da177e4 LT |
1298 | { |
1299 | struct serial_struct out_info; | |
d8d16e47 | 1300 | |
1da177e4 LT |
1301 | memset(&out_info, 0, sizeof(out_info)); |
1302 | /* out_info.type = ? */ | |
1303 | out_info.line = port - isi_ports; | |
1304 | out_info.port = port->card->base; | |
1305 | out_info.irq = port->card->irq; | |
1306 | out_info.flags = port->flags; | |
1307 | /* out_info.baud_base = ? */ | |
1308 | out_info.close_delay = port->close_delay; | |
1309 | out_info.closing_wait = port->closing_wait; | |
d8d16e47 | 1310 | if (copy_to_user(info, &out_info, sizeof(out_info))) |
1da177e4 LT |
1311 | return -EFAULT; |
1312 | return 0; | |
d8d16e47 | 1313 | } |
1da177e4 | 1314 | |
d8d16e47 JS |
1315 | static int isicom_ioctl(struct tty_struct *tty, struct file *filp, |
1316 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1317 | { |
8070e35c | 1318 | struct isi_port *port = tty->driver_data; |
1da177e4 LT |
1319 | void __user *argp = (void __user *)arg; |
1320 | int retval; | |
1321 | ||
1322 | if (isicom_paranoia_check(port, tty->name, "isicom_ioctl")) | |
1323 | return -ENODEV; | |
1324 | ||
1325 | switch(cmd) { | |
d8d16e47 JS |
1326 | case TCSBRK: |
1327 | retval = tty_check_change(tty); | |
1328 | if (retval) | |
1329 | return retval; | |
1330 | tty_wait_until_sent(tty, 0); | |
1331 | if (!arg) | |
1332 | isicom_send_break(port, HZ/4); | |
1333 | return 0; | |
1334 | ||
1335 | case TCSBRKP: | |
1336 | retval = tty_check_change(tty); | |
1337 | if (retval) | |
1338 | return retval; | |
1339 | tty_wait_until_sent(tty, 0); | |
1340 | isicom_send_break(port, arg ? arg * (HZ/10) : HZ/4); | |
1341 | return 0; | |
1342 | ||
1343 | case TIOCGSOFTCAR: | |
a547dfe9 JS |
1344 | return put_user(C_CLOCAL(tty) ? 1 : 0, |
1345 | (unsigned long __user *)argp); | |
d8d16e47 JS |
1346 | |
1347 | case TIOCSSOFTCAR: | |
1348 | if (get_user(arg, (unsigned long __user *) argp)) | |
1349 | return -EFAULT; | |
1350 | tty->termios->c_cflag = | |
1351 | ((tty->termios->c_cflag & ~CLOCAL) | | |
1352 | (arg ? CLOCAL : 0)); | |
1353 | return 0; | |
1354 | ||
1355 | case TIOCGSERIAL: | |
1356 | return isicom_get_serial_info(port, argp); | |
1357 | ||
1358 | case TIOCSSERIAL: | |
1359 | return isicom_set_serial_info(port, argp); | |
1360 | ||
1361 | default: | |
1362 | return -ENOIOCTLCMD; | |
1da177e4 LT |
1363 | } |
1364 | return 0; | |
1365 | } | |
1366 | ||
1367 | /* set_termios et all */ | |
d8d16e47 | 1368 | static void isicom_set_termios(struct tty_struct *tty, |
606d099c | 1369 | struct ktermios *old_termios) |
1da177e4 | 1370 | { |
8070e35c | 1371 | struct isi_port *port = tty->driver_data; |
cfe7c09a | 1372 | unsigned long flags; |
d8d16e47 | 1373 | |
1da177e4 LT |
1374 | if (isicom_paranoia_check(port, tty->name, "isicom_set_termios")) |
1375 | return; | |
d8d16e47 | 1376 | |
1da177e4 | 1377 | if (tty->termios->c_cflag == old_termios->c_cflag && |
d8d16e47 | 1378 | tty->termios->c_iflag == old_termios->c_iflag) |
1da177e4 | 1379 | return; |
d8d16e47 | 1380 | |
cfe7c09a | 1381 | spin_lock_irqsave(&port->card->card_lock, flags); |
1da177e4 | 1382 | isicom_config_port(port); |
cfe7c09a | 1383 | spin_unlock_irqrestore(&port->card->card_lock, flags); |
d8d16e47 | 1384 | |
1da177e4 | 1385 | if ((old_termios->c_cflag & CRTSCTS) && |
d8d16e47 | 1386 | !(tty->termios->c_cflag & CRTSCTS)) { |
1da177e4 | 1387 | tty->hw_stopped = 0; |
d8d16e47 JS |
1388 | isicom_start(tty); |
1389 | } | |
1da177e4 LT |
1390 | } |
1391 | ||
1392 | /* throttle et all */ | |
d8d16e47 | 1393 | static void isicom_throttle(struct tty_struct *tty) |
1da177e4 | 1394 | { |
8070e35c | 1395 | struct isi_port *port = tty->driver_data; |
d8d16e47 JS |
1396 | struct isi_board *card = port->card; |
1397 | ||
1da177e4 LT |
1398 | if (isicom_paranoia_check(port, tty->name, "isicom_throttle")) |
1399 | return; | |
d8d16e47 | 1400 | |
1da177e4 LT |
1401 | /* tell the card that this port cannot handle any more data for now */ |
1402 | card->port_status &= ~(1 << port->channel); | |
1403 | outw(card->port_status, card->base + 0x02); | |
1404 | } | |
1405 | ||
1406 | /* unthrottle et all */ | |
d8d16e47 | 1407 | static void isicom_unthrottle(struct tty_struct *tty) |
1da177e4 | 1408 | { |
8070e35c | 1409 | struct isi_port *port = tty->driver_data; |
d8d16e47 JS |
1410 | struct isi_board *card = port->card; |
1411 | ||
1da177e4 LT |
1412 | if (isicom_paranoia_check(port, tty->name, "isicom_unthrottle")) |
1413 | return; | |
d8d16e47 | 1414 | |
1da177e4 LT |
1415 | /* tell the card that this port is ready to accept more data */ |
1416 | card->port_status |= (1 << port->channel); | |
1417 | outw(card->port_status, card->base + 0x02); | |
1418 | } | |
1419 | ||
1420 | /* stop et all */ | |
d8d16e47 | 1421 | static void isicom_stop(struct tty_struct *tty) |
1da177e4 | 1422 | { |
8070e35c | 1423 | struct isi_port *port = tty->driver_data; |
1da177e4 LT |
1424 | |
1425 | if (isicom_paranoia_check(port, tty->name, "isicom_stop")) | |
1426 | return; | |
d8d16e47 | 1427 | |
1da177e4 LT |
1428 | /* this tells the transmitter not to consider this port for |
1429 | data output to the card. */ | |
1430 | port->status &= ~ISI_TXOK; | |
1431 | } | |
1432 | ||
1433 | /* start et all */ | |
d8d16e47 | 1434 | static void isicom_start(struct tty_struct *tty) |
1da177e4 | 1435 | { |
8070e35c | 1436 | struct isi_port *port = tty->driver_data; |
d8d16e47 | 1437 | |
1da177e4 LT |
1438 | if (isicom_paranoia_check(port, tty->name, "isicom_start")) |
1439 | return; | |
d8d16e47 | 1440 | |
1da177e4 LT |
1441 | /* this tells the transmitter to consider this port for |
1442 | data output to the card. */ | |
1443 | port->status |= ISI_TXOK; | |
1444 | } | |
1445 | ||
d8d16e47 | 1446 | static void isicom_hangup(struct tty_struct *tty) |
1da177e4 | 1447 | { |
8070e35c | 1448 | struct isi_port *port = tty->driver_data; |
cfe7c09a | 1449 | unsigned long flags; |
d8d16e47 | 1450 | |
1da177e4 LT |
1451 | if (isicom_paranoia_check(port, tty->name, "isicom_hangup")) |
1452 | return; | |
d8d16e47 | 1453 | |
cfe7c09a | 1454 | spin_lock_irqsave(&port->card->card_lock, flags); |
1da177e4 | 1455 | isicom_shutdown_port(port); |
cfe7c09a JS |
1456 | spin_unlock_irqrestore(&port->card->card_lock, flags); |
1457 | ||
1da177e4 LT |
1458 | port->count = 0; |
1459 | port->flags &= ~ASYNC_NORMAL_ACTIVE; | |
1460 | port->tty = NULL; | |
1461 | wake_up_interruptible(&port->open_wait); | |
1462 | } | |
1463 | ||
1464 | /* flush_buffer et all */ | |
d8d16e47 | 1465 | static void isicom_flush_buffer(struct tty_struct *tty) |
1da177e4 | 1466 | { |
8070e35c | 1467 | struct isi_port *port = tty->driver_data; |
d8d16e47 | 1468 | struct isi_board *card = port->card; |
1da177e4 | 1469 | unsigned long flags; |
d8d16e47 | 1470 | |
1da177e4 LT |
1471 | if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer")) |
1472 | return; | |
d8d16e47 | 1473 | |
1da177e4 LT |
1474 | spin_lock_irqsave(&card->card_lock, flags); |
1475 | port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; | |
1476 | spin_unlock_irqrestore(&card->card_lock, flags); | |
d8d16e47 | 1477 | |
1da177e4 LT |
1478 | tty_wakeup(tty); |
1479 | } | |
1480 | ||
9ac0948b JS |
1481 | /* |
1482 | * Driver init and deinit functions | |
1483 | */ | |
1da177e4 | 1484 | |
b68e31d0 | 1485 | static const struct tty_operations isicom_ops = { |
d8d16e47 JS |
1486 | .open = isicom_open, |
1487 | .close = isicom_close, | |
1488 | .write = isicom_write, | |
1489 | .put_char = isicom_put_char, | |
1490 | .flush_chars = isicom_flush_chars, | |
1491 | .write_room = isicom_write_room, | |
1da177e4 | 1492 | .chars_in_buffer = isicom_chars_in_buffer, |
d8d16e47 JS |
1493 | .ioctl = isicom_ioctl, |
1494 | .set_termios = isicom_set_termios, | |
1495 | .throttle = isicom_throttle, | |
1496 | .unthrottle = isicom_unthrottle, | |
1497 | .stop = isicom_stop, | |
1498 | .start = isicom_start, | |
1499 | .hangup = isicom_hangup, | |
1500 | .flush_buffer = isicom_flush_buffer, | |
1501 | .tiocmget = isicom_tiocmget, | |
1502 | .tiocmset = isicom_tiocmset, | |
1da177e4 LT |
1503 | }; |
1504 | ||
9ac0948b JS |
1505 | static int __devinit reset_card(struct pci_dev *pdev, |
1506 | const unsigned int card, unsigned int *signature) | |
1da177e4 | 1507 | { |
9ac0948b JS |
1508 | struct isi_board *board = pci_get_drvdata(pdev); |
1509 | unsigned long base = board->base; | |
f0a0ba6d | 1510 | unsigned int sig, portcount = 0; |
9ac0948b | 1511 | int retval = 0; |
d8d16e47 | 1512 | |
9ac0948b JS |
1513 | dev_dbg(&pdev->dev, "ISILoad:Resetting Card%d at 0x%lx\n", card + 1, |
1514 | base); | |
d8d16e47 | 1515 | |
9ac0948b | 1516 | inw(base + 0x8); |
d8d16e47 | 1517 | |
f0a0ba6d | 1518 | msleep(10); |
9ac0948b JS |
1519 | |
1520 | outw(0, base + 0x8); /* Reset */ | |
1521 | ||
f0a0ba6d | 1522 | msleep(1000); |
9ac0948b | 1523 | |
f0a0ba6d JS |
1524 | sig = inw(base + 0x4) & 0xff; |
1525 | ||
1526 | if (sig != 0xa5 && sig != 0xbb && sig != 0xcc && sig != 0xdd && | |
1527 | sig != 0xee) { | |
1528 | dev_warn(&pdev->dev, "ISILoad:Card%u reset failure (Possible " | |
1529 | "bad I/O Port Address 0x%lx).\n", card + 1, base); | |
1530 | dev_dbg(&pdev->dev, "Sig=0x%x\n", sig); | |
1531 | retval = -EIO; | |
1532 | goto end; | |
1533 | } | |
1534 | ||
1535 | msleep(10); | |
9ac0948b | 1536 | |
18234f88 | 1537 | portcount = inw(base + 0x2); |
f0a0ba6d JS |
1538 | if (!inw(base + 0xe) & 0x1 || (portcount != 0 && portcount != 4 && |
1539 | portcount != 8 && portcount != 16)) { | |
1540 | dev_err(&pdev->dev, "ISILoad:PCI Card%d reset failure.", | |
1541 | card + 1); | |
18234f88 JS |
1542 | retval = -EIO; |
1543 | goto end; | |
9ac0948b JS |
1544 | } |
1545 | ||
f0a0ba6d | 1546 | switch (sig) { |
9ac0948b JS |
1547 | case 0xa5: |
1548 | case 0xbb: | |
1549 | case 0xdd: | |
18234f88 | 1550 | board->port_count = (portcount == 4) ? 4 : 8; |
9ac0948b JS |
1551 | board->shift_count = 12; |
1552 | break; | |
1553 | case 0xcc: | |
f0a0ba6d | 1554 | case 0xee: |
9ac0948b JS |
1555 | board->port_count = 16; |
1556 | board->shift_count = 11; | |
1557 | break; | |
d8d16e47 | 1558 | } |
9ac0948b | 1559 | dev_info(&pdev->dev, "-Done\n"); |
f0a0ba6d | 1560 | *signature = sig; |
d8d16e47 | 1561 | |
9ac0948b JS |
1562 | end: |
1563 | return retval; | |
1da177e4 LT |
1564 | } |
1565 | ||
e65c1db1 JS |
1566 | static int __devinit load_firmware(struct pci_dev *pdev, |
1567 | const unsigned int index, const unsigned int signature) | |
1568 | { | |
1569 | struct isi_board *board = pci_get_drvdata(pdev); | |
1570 | const struct firmware *fw; | |
1571 | unsigned long base = board->base; | |
1572 | unsigned int a; | |
1573 | u16 word_count, status; | |
1574 | int retval = -EIO; | |
1575 | char *name; | |
1576 | u8 *data; | |
1577 | ||
1578 | struct stframe { | |
1579 | u16 addr; | |
1580 | u16 count; | |
1581 | u8 data[0]; | |
1582 | } *frame; | |
1583 | ||
1584 | switch (signature) { | |
1585 | case 0xa5: | |
1586 | name = "isi608.bin"; | |
1587 | break; | |
1588 | case 0xbb: | |
1589 | name = "isi608em.bin"; | |
1590 | break; | |
1591 | case 0xcc: | |
1592 | name = "isi616em.bin"; | |
1593 | break; | |
1594 | case 0xdd: | |
1595 | name = "isi4608.bin"; | |
1596 | break; | |
1597 | case 0xee: | |
1598 | name = "isi4616.bin"; | |
1599 | break; | |
1600 | default: | |
1601 | dev_err(&pdev->dev, "Unknown signature.\n"); | |
1602 | goto end; | |
1603 | } | |
1604 | ||
1605 | retval = request_firmware(&fw, name, &pdev->dev); | |
1606 | if (retval) | |
1607 | goto end; | |
1608 | ||
e4e04088 JS |
1609 | retval = -EIO; |
1610 | ||
e65c1db1 JS |
1611 | for (frame = (struct stframe *)fw->data; |
1612 | frame < (struct stframe *)(fw->data + fw->size); | |
e4e04088 JS |
1613 | frame = (struct stframe *)((u8 *)(frame + 1) + |
1614 | frame->count)) { | |
e65c1db1 JS |
1615 | if (WaitTillCardIsFree(base)) |
1616 | goto errrelfw; | |
1617 | ||
1618 | outw(0xf0, base); /* start upload sequence */ | |
1619 | outw(0x00, base); | |
1620 | outw(frame->addr, base); /* lsb of address */ | |
1621 | ||
1622 | word_count = frame->count / 2 + frame->count % 2; | |
1623 | outw(word_count, base); | |
1624 | InterruptTheCard(base); | |
1625 | ||
1626 | udelay(100); /* 0x2f */ | |
1627 | ||
1628 | if (WaitTillCardIsFree(base)) | |
1629 | goto errrelfw; | |
1630 | ||
1631 | if ((status = inw(base + 0x4)) != 0) { | |
1632 | dev_warn(&pdev->dev, "Card%d rejected load header:\n" | |
1633 | "Address:0x%x\nCount:0x%x\nStatus:0x%x\n", | |
1634 | index + 1, frame->addr, frame->count, status); | |
1635 | goto errrelfw; | |
1636 | } | |
1637 | outsw(base, frame->data, word_count); | |
1638 | ||
1639 | InterruptTheCard(base); | |
1640 | ||
1641 | udelay(50); /* 0x0f */ | |
1642 | ||
1643 | if (WaitTillCardIsFree(base)) | |
1644 | goto errrelfw; | |
1645 | ||
1646 | if ((status = inw(base + 0x4)) != 0) { | |
1647 | dev_err(&pdev->dev, "Card%d got out of sync.Card " | |
1648 | "Status:0x%x\n", index + 1, status); | |
1649 | goto errrelfw; | |
1650 | } | |
1651 | } | |
1652 | ||
e65c1db1 JS |
1653 | /* XXX: should we test it by reading it back and comparing with original like |
1654 | * in load firmware package? */ | |
e4e04088 JS |
1655 | for (frame = (struct stframe *)fw->data; |
1656 | frame < (struct stframe *)(fw->data + fw->size); | |
1657 | frame = (struct stframe *)((u8 *)(frame + 1) + | |
1658 | frame->count)) { | |
e65c1db1 JS |
1659 | if (WaitTillCardIsFree(base)) |
1660 | goto errrelfw; | |
1661 | ||
1662 | outw(0xf1, base); /* start download sequence */ | |
1663 | outw(0x00, base); | |
1664 | outw(frame->addr, base); /* lsb of address */ | |
1665 | ||
1666 | word_count = (frame->count >> 1) + frame->count % 2; | |
1667 | outw(word_count + 1, base); | |
1668 | InterruptTheCard(base); | |
1669 | ||
1670 | udelay(50); /* 0xf */ | |
1671 | ||
1672 | if (WaitTillCardIsFree(base)) | |
1673 | goto errrelfw; | |
1674 | ||
1675 | if ((status = inw(base + 0x4)) != 0) { | |
1676 | dev_warn(&pdev->dev, "Card%d rejected verify header:\n" | |
1677 | "Address:0x%x\nCount:0x%x\nStatus: 0x%x\n", | |
1678 | index + 1, frame->addr, frame->count, status); | |
1679 | goto errrelfw; | |
1680 | } | |
1681 | ||
1682 | data = kmalloc(word_count * 2, GFP_KERNEL); | |
f0671378 JS |
1683 | if (data == NULL) { |
1684 | dev_err(&pdev->dev, "Card%d, firmware upload " | |
1685 | "failed, not enough memory\n", index + 1); | |
1686 | goto errrelfw; | |
1687 | } | |
e65c1db1 JS |
1688 | inw(base); |
1689 | insw(base, data, word_count); | |
1690 | InterruptTheCard(base); | |
1691 | ||
1692 | for (a = 0; a < frame->count; a++) | |
1693 | if (data[a] != frame->data[a]) { | |
1694 | kfree(data); | |
1695 | dev_err(&pdev->dev, "Card%d, firmware upload " | |
1696 | "failed\n", index + 1); | |
1697 | goto errrelfw; | |
1698 | } | |
1699 | kfree(data); | |
1700 | ||
1701 | udelay(50); /* 0xf */ | |
1702 | ||
1703 | if (WaitTillCardIsFree(base)) | |
1704 | goto errrelfw; | |
1705 | ||
1706 | if ((status = inw(base + 0x4)) != 0) { | |
1707 | dev_err(&pdev->dev, "Card%d verify got out of sync. " | |
1708 | "Card Status:0x%x\n", index + 1, status); | |
1709 | goto errrelfw; | |
1710 | } | |
1711 | } | |
1712 | ||
e4e04088 JS |
1713 | /* xfer ctrl */ |
1714 | if (WaitTillCardIsFree(base)) | |
1715 | goto errrelfw; | |
1716 | ||
1717 | outw(0xf2, base); | |
1718 | outw(0x800, base); | |
1719 | outw(0x0, base); | |
1720 | outw(0x0, base); | |
1721 | InterruptTheCard(base); | |
1722 | outw(0x0, base + 0x4); /* for ISI4608 cards */ | |
1723 | ||
e65c1db1 JS |
1724 | board->status |= FIRMWARE_LOADED; |
1725 | retval = 0; | |
1726 | ||
1727 | errrelfw: | |
1728 | release_firmware(fw); | |
1729 | end: | |
1730 | return retval; | |
1731 | } | |
1732 | ||
1da177e4 LT |
1733 | /* |
1734 | * Insmod can set static symbols so keep these static | |
1735 | */ | |
1ed0c0b7 | 1736 | static unsigned int card_count; |
9ac0948b JS |
1737 | |
1738 | static int __devinit isicom_probe(struct pci_dev *pdev, | |
1739 | const struct pci_device_id *ent) | |
1740 | { | |
1741 | unsigned int ioaddr, signature, index; | |
1742 | int retval = -EPERM; | |
1743 | u8 pciirq; | |
1744 | struct isi_board *board = NULL; | |
1745 | ||
1ed0c0b7 | 1746 | if (card_count >= BOARD_COUNT) |
9ac0948b JS |
1747 | goto err; |
1748 | ||
1749 | ioaddr = pci_resource_start(pdev, 3); | |
1750 | /* i.e at offset 0x1c in the PCI configuration register space. */ | |
1751 | pciirq = pdev->irq; | |
1752 | dev_info(&pdev->dev, "ISI PCI Card(Device ID 0x%x)\n", ent->device); | |
1753 | ||
1754 | /* allot the first empty slot in the array */ | |
1755 | for (index = 0; index < BOARD_COUNT; index++) | |
1756 | if (isi_card[index].base == 0) { | |
1757 | board = &isi_card[index]; | |
1758 | break; | |
1759 | } | |
1760 | ||
938a7023 | 1761 | board->index = index; |
9ac0948b JS |
1762 | board->base = ioaddr; |
1763 | board->irq = pciirq; | |
1ed0c0b7 | 1764 | card_count++; |
9ac0948b JS |
1765 | |
1766 | pci_set_drvdata(pdev, board); | |
1767 | ||
78028da9 JS |
1768 | retval = pci_request_region(pdev, 3, ISICOM_NAME); |
1769 | if (retval) { | |
09a4a112 JS |
1770 | dev_err(&pdev->dev, "I/O Region 0x%lx-0x%lx is busy. Card%d " |
1771 | "will be disabled.\n", board->base, board->base + 15, | |
1772 | index + 1); | |
1773 | retval = -EBUSY; | |
1ed0c0b7 | 1774 | goto errdec; |
09a4a112 | 1775 | } |
9ac0948b | 1776 | |
09a4a112 JS |
1777 | retval = request_irq(board->irq, isicom_interrupt, |
1778 | IRQF_SHARED | IRQF_DISABLED, ISICOM_NAME, board); | |
1779 | if (retval < 0) { | |
1780 | dev_err(&pdev->dev, "Could not install handler at Irq %d. " | |
1781 | "Card%d will be disabled.\n", board->irq, index + 1); | |
9ac0948b | 1782 | goto errunrr; |
09a4a112 | 1783 | } |
9ac0948b JS |
1784 | |
1785 | retval = reset_card(pdev, index, &signature); | |
1786 | if (retval < 0) | |
1787 | goto errunri; | |
1788 | ||
e65c1db1 JS |
1789 | retval = load_firmware(pdev, index, signature); |
1790 | if (retval < 0) | |
1791 | goto errunri; | |
1792 | ||
938a7023 JS |
1793 | for (index = 0; index < board->port_count; index++) |
1794 | tty_register_device(isicom_normal, board->index * 16 + index, | |
1795 | &pdev->dev); | |
1796 | ||
9ac0948b JS |
1797 | return 0; |
1798 | ||
1799 | errunri: | |
1800 | free_irq(board->irq, board); | |
1801 | errunrr: | |
78028da9 | 1802 | pci_release_region(pdev, 3); |
1ed0c0b7 | 1803 | errdec: |
9ac0948b | 1804 | board->base = 0; |
1ed0c0b7 JS |
1805 | card_count--; |
1806 | err: | |
9ac0948b JS |
1807 | return retval; |
1808 | } | |
1809 | ||
1810 | static void __devexit isicom_remove(struct pci_dev *pdev) | |
1811 | { | |
1812 | struct isi_board *board = pci_get_drvdata(pdev); | |
938a7023 JS |
1813 | unsigned int i; |
1814 | ||
1815 | for (i = 0; i < board->port_count; i++) | |
1816 | tty_unregister_device(isicom_normal, board->index * 16 + i); | |
9ac0948b JS |
1817 | |
1818 | free_irq(board->irq, board); | |
78028da9 | 1819 | pci_release_region(pdev, 3); |
1ed0c0b7 JS |
1820 | board->base = 0; |
1821 | card_count--; | |
9ac0948b | 1822 | } |
1da177e4 | 1823 | |
ca262005 | 1824 | static int __init isicom_init(void) |
1da177e4 | 1825 | { |
9ac0948b JS |
1826 | int retval, idx, channel; |
1827 | struct isi_port *port; | |
d8d16e47 | 1828 | |
9ac0948b JS |
1829 | for(idx = 0; idx < BOARD_COUNT; idx++) { |
1830 | port = &isi_ports[idx * 16]; | |
1831 | isi_card[idx].ports = port; | |
1832 | spin_lock_init(&isi_card[idx].card_lock); | |
1833 | for (channel = 0; channel < 16; channel++, port++) { | |
1834 | port->magic = ISICOM_MAGIC; | |
1835 | port->card = &isi_card[idx]; | |
1836 | port->channel = channel; | |
1837 | port->close_delay = 50 * HZ/100; | |
1838 | port->closing_wait = 3000 * HZ/100; | |
9ac0948b JS |
1839 | port->status = 0; |
1840 | init_waitqueue_head(&port->open_wait); | |
1841 | init_waitqueue_head(&port->close_wait); | |
1842 | /* . . . */ | |
1843 | } | |
1844 | isi_card[idx].base = 0; | |
1845 | isi_card[idx].irq = 0; | |
1da177e4 | 1846 | } |
d8d16e47 | 1847 | |
09a4a112 JS |
1848 | /* tty driver structure initialization */ |
1849 | isicom_normal = alloc_tty_driver(PORT_COUNT); | |
1850 | if (!isicom_normal) { | |
1851 | retval = -ENOMEM; | |
9ac0948b | 1852 | goto error; |
09a4a112 JS |
1853 | } |
1854 | ||
1855 | isicom_normal->owner = THIS_MODULE; | |
1856 | isicom_normal->name = "ttyM"; | |
1857 | isicom_normal->major = ISICOM_NMAJOR; | |
1858 | isicom_normal->minor_start = 0; | |
1859 | isicom_normal->type = TTY_DRIVER_TYPE_SERIAL; | |
1860 | isicom_normal->subtype = SERIAL_TYPE_NORMAL; | |
1861 | isicom_normal->init_termios = tty_std_termios; | |
1862 | isicom_normal->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | | |
1863 | CLOCAL; | |
938a7023 JS |
1864 | isicom_normal->flags = TTY_DRIVER_REAL_RAW | |
1865 | TTY_DRIVER_DYNAMIC_DEV; | |
09a4a112 JS |
1866 | tty_set_operations(isicom_normal, &isicom_ops); |
1867 | ||
1868 | retval = tty_register_driver(isicom_normal); | |
1869 | if (retval) { | |
1870 | pr_dbg("Couldn't register the dialin driver\n"); | |
1871 | goto err_puttty; | |
1872 | } | |
1da177e4 | 1873 | |
9ac0948b | 1874 | retval = pci_register_driver(&isicom_driver); |
1da177e4 | 1875 | if (retval < 0) { |
9ac0948b | 1876 | printk(KERN_ERR "ISICOM: Unable to register pci driver.\n"); |
09a4a112 | 1877 | goto err_unrtty; |
1da177e4 | 1878 | } |
d8d16e47 | 1879 | |
34b55b86 | 1880 | mod_timer(&tx, jiffies + 1); |
d8d16e47 | 1881 | |
1da177e4 | 1882 | return 0; |
09a4a112 JS |
1883 | err_unrtty: |
1884 | tty_unregister_driver(isicom_normal); | |
1885 | err_puttty: | |
1886 | put_tty_driver(isicom_normal); | |
9ac0948b JS |
1887 | error: |
1888 | return retval; | |
1da177e4 LT |
1889 | } |
1890 | ||
1891 | static void __exit isicom_exit(void) | |
1892 | { | |
1893 | re_schedule = 0; | |
aaa246ea | 1894 | |
906cdecb | 1895 | wait_for_completion_timeout(&isi_timerdone, HZ); |
aaa246ea | 1896 | |
9ac0948b | 1897 | pci_unregister_driver(&isicom_driver); |
09a4a112 JS |
1898 | tty_unregister_driver(isicom_normal); |
1899 | put_tty_driver(isicom_normal); | |
1da177e4 LT |
1900 | } |
1901 | ||
ca262005 | 1902 | module_init(isicom_init); |
1da177e4 | 1903 | module_exit(isicom_exit); |
aaa246ea JS |
1904 | |
1905 | MODULE_AUTHOR("MultiTech"); | |
1906 | MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech"); | |
1907 | MODULE_LICENSE("GPL"); |