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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 | ||
251b8dd7 AC |
129 | #include <linux/uaccess.h> |
130 | #include <linux/io.h> | |
1da177e4 LT |
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 | ||
1da177e4 | 174 | static void isicom_tx(unsigned long _data); |
d8d16e47 | 175 | static void isicom_start(struct tty_struct *tty); |
1da177e4 | 176 | |
34b55b86 JS |
177 | static DEFINE_TIMER(tx, isicom_tx, 0, 0); |
178 | ||
1da177e4 LT |
179 | /* baud index mappings from linux defns to isi */ |
180 | ||
181 | static signed char linuxb_to_isib[] = { | |
7edc136a | 182 | -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 16, 17, 18, 19, 20, 21 |
1da177e4 LT |
183 | }; |
184 | ||
185 | struct isi_board { | |
8070e35c | 186 | unsigned long base; |
4969b3a4 | 187 | int irq; |
1da177e4 LT |
188 | unsigned char port_count; |
189 | unsigned short status; | |
a547dfe9 | 190 | unsigned short port_status; /* each bit for each port */ |
1da177e4 | 191 | unsigned short shift_count; |
251b8dd7 | 192 | struct isi_port *ports; |
1da177e4 | 193 | signed char count; |
1da177e4 LT |
194 | spinlock_t card_lock; /* Card wide lock 11/5/00 -sameer */ |
195 | unsigned long flags; | |
938a7023 | 196 | unsigned int index; |
1da177e4 LT |
197 | }; |
198 | ||
199 | struct isi_port { | |
200 | unsigned short magic; | |
f1d03228 | 201 | struct tty_port port; |
8070e35c JS |
202 | u16 channel; |
203 | u16 status; | |
251b8dd7 | 204 | struct isi_board *card; |
251b8dd7 | 205 | unsigned char *xmit_buf; |
1da177e4 LT |
206 | int xmit_head; |
207 | int xmit_tail; | |
208 | int xmit_cnt; | |
209 | }; | |
210 | ||
211 | static struct isi_board isi_card[BOARD_COUNT]; | |
212 | static struct isi_port isi_ports[PORT_COUNT]; | |
213 | ||
214 | /* | |
215 | * Locking functions for card level locking. We need to own both | |
216 | * the kernel lock for the card and have the card in a position that | |
217 | * it wants to talk. | |
218 | */ | |
d8d16e47 | 219 | |
4969b3a4 | 220 | static inline int WaitTillCardIsFree(unsigned long base) |
cfe7c09a JS |
221 | { |
222 | unsigned int count = 0; | |
223 | unsigned int a = in_atomic(); /* do we run under spinlock? */ | |
224 | ||
225 | while (!(inw(base + 0xe) & 0x1) && count++ < 100) | |
226 | if (a) | |
227 | mdelay(1); | |
228 | else | |
229 | msleep(1); | |
230 | ||
231 | return !(inw(base + 0xe) & 0x1); | |
232 | } | |
233 | ||
1da177e4 LT |
234 | static int lock_card(struct isi_board *card) |
235 | { | |
8070e35c | 236 | unsigned long base = card->base; |
5b21f9dd | 237 | unsigned int retries, a; |
1da177e4 | 238 | |
5b21f9dd | 239 | for (retries = 0; retries < 10; retries++) { |
1da177e4 | 240 | spin_lock_irqsave(&card->card_lock, card->flags); |
5b21f9dd JS |
241 | for (a = 0; a < 10; a++) { |
242 | if (inw(base + 0xe) & 0x1) | |
243 | return 1; | |
244 | udelay(10); | |
1da177e4 | 245 | } |
5b21f9dd JS |
246 | spin_unlock_irqrestore(&card->card_lock, card->flags); |
247 | msleep(10); | |
1da177e4 | 248 | } |
a547dfe9 JS |
249 | printk(KERN_WARNING "ISICOM: Failed to lock Card (0x%lx)\n", |
250 | card->base); | |
251 | ||
0418726b | 252 | return 0; /* Failed to acquire the card! */ |
1da177e4 LT |
253 | } |
254 | ||
1da177e4 LT |
255 | static void unlock_card(struct isi_board *card) |
256 | { | |
257 | spin_unlock_irqrestore(&card->card_lock, card->flags); | |
258 | } | |
259 | ||
260 | /* | |
261 | * ISI Card specific ops ... | |
262 | */ | |
d8d16e47 | 263 | |
cfe7c09a | 264 | /* card->lock HAS to be held */ |
d8d16e47 | 265 | static void raise_dtr(struct isi_port *port) |
1da177e4 | 266 | { |
d8d16e47 | 267 | struct isi_board *card = port->card; |
8070e35c JS |
268 | unsigned long base = card->base; |
269 | u16 channel = port->channel; | |
1da177e4 | 270 | |
cfe7c09a | 271 | if (WaitTillCardIsFree(base)) |
1da177e4 LT |
272 | return; |
273 | ||
d8d16e47 | 274 | outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
1da177e4 LT |
275 | outw(0x0504, base); |
276 | InterruptTheCard(base); | |
277 | port->status |= ISI_DTR; | |
1da177e4 LT |
278 | } |
279 | ||
cfe7c09a | 280 | /* card->lock HAS to be held */ |
d8d16e47 JS |
281 | static inline void drop_dtr(struct isi_port *port) |
282 | { | |
283 | struct isi_board *card = port->card; | |
8070e35c JS |
284 | unsigned long base = card->base; |
285 | u16 channel = port->channel; | |
1da177e4 | 286 | |
cfe7c09a | 287 | if (WaitTillCardIsFree(base)) |
1da177e4 LT |
288 | return; |
289 | ||
d8d16e47 | 290 | outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
1da177e4 | 291 | outw(0x0404, base); |
d8d16e47 | 292 | InterruptTheCard(base); |
1da177e4 | 293 | port->status &= ~ISI_DTR; |
1da177e4 LT |
294 | } |
295 | ||
cfe7c09a | 296 | /* card->lock HAS to be held */ |
d8d16e47 | 297 | static inline void raise_rts(struct isi_port *port) |
1da177e4 | 298 | { |
d8d16e47 | 299 | struct isi_board *card = port->card; |
8070e35c JS |
300 | unsigned long base = card->base; |
301 | u16 channel = port->channel; | |
1da177e4 | 302 | |
cfe7c09a | 303 | if (WaitTillCardIsFree(base)) |
1da177e4 LT |
304 | return; |
305 | ||
d8d16e47 | 306 | outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
1da177e4 | 307 | outw(0x0a04, base); |
d8d16e47 | 308 | InterruptTheCard(base); |
1da177e4 | 309 | port->status |= ISI_RTS; |
1da177e4 | 310 | } |
cfe7c09a JS |
311 | |
312 | /* card->lock HAS to be held */ | |
d8d16e47 | 313 | static inline void drop_rts(struct isi_port *port) |
1da177e4 | 314 | { |
d8d16e47 | 315 | struct isi_board *card = port->card; |
8070e35c JS |
316 | unsigned long base = card->base; |
317 | u16 channel = port->channel; | |
1da177e4 | 318 | |
cfe7c09a | 319 | if (WaitTillCardIsFree(base)) |
1da177e4 LT |
320 | return; |
321 | ||
d8d16e47 | 322 | outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
1da177e4 | 323 | outw(0x0804, base); |
d8d16e47 | 324 | InterruptTheCard(base); |
1da177e4 | 325 | port->status &= ~ISI_RTS; |
1da177e4 LT |
326 | } |
327 | ||
cfe7c09a | 328 | /* card->lock MUST NOT be held */ |
d8d16e47 | 329 | static inline void raise_dtr_rts(struct isi_port *port) |
1da177e4 | 330 | { |
d8d16e47 | 331 | struct isi_board *card = port->card; |
8070e35c JS |
332 | unsigned long base = card->base; |
333 | u16 channel = port->channel; | |
1da177e4 LT |
334 | |
335 | if (!lock_card(card)) | |
336 | return; | |
337 | ||
d8d16e47 | 338 | outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
1da177e4 LT |
339 | outw(0x0f04, base); |
340 | InterruptTheCard(base); | |
341 | port->status |= (ISI_DTR | ISI_RTS); | |
342 | unlock_card(card); | |
343 | } | |
344 | ||
cfe7c09a | 345 | /* card->lock HAS to be held */ |
d8d16e47 | 346 | static void drop_dtr_rts(struct isi_port *port) |
1da177e4 | 347 | { |
d8d16e47 | 348 | struct isi_board *card = port->card; |
8070e35c JS |
349 | unsigned long base = card->base; |
350 | u16 channel = port->channel; | |
1da177e4 | 351 | |
cfe7c09a | 352 | if (WaitTillCardIsFree(base)) |
1da177e4 LT |
353 | return; |
354 | ||
d8d16e47 | 355 | outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
1da177e4 | 356 | outw(0x0c04, base); |
d8d16e47 | 357 | InterruptTheCard(base); |
1da177e4 | 358 | port->status &= ~(ISI_RTS | ISI_DTR); |
1da177e4 LT |
359 | } |
360 | ||
1da177e4 LT |
361 | /* |
362 | * ISICOM Driver specific routines ... | |
363 | * | |
364 | */ | |
d8d16e47 | 365 | |
aaa246ea JS |
366 | static inline int __isicom_paranoia_check(struct isi_port const *port, |
367 | char *name, const char *routine) | |
1da177e4 | 368 | { |
1da177e4 | 369 | if (!port) { |
aaa246ea JS |
370 | printk(KERN_WARNING "ISICOM: Warning: bad isicom magic for " |
371 | "dev %s in %s.\n", name, routine); | |
1da177e4 LT |
372 | return 1; |
373 | } | |
374 | if (port->magic != ISICOM_MAGIC) { | |
aaa246ea JS |
375 | printk(KERN_WARNING "ISICOM: Warning: NULL isicom port for " |
376 | "dev %s in %s.\n", name, routine); | |
1da177e4 | 377 | return 1; |
d8d16e47 | 378 | } |
aaa246ea | 379 | |
1da177e4 LT |
380 | return 0; |
381 | } | |
d8d16e47 | 382 | |
1da177e4 | 383 | /* |
d8d16e47 | 384 | * Transmitter. |
1da177e4 LT |
385 | * |
386 | * We shovel data into the card buffers on a regular basis. The card | |
387 | * will do the rest of the work for us. | |
388 | */ | |
389 | ||
390 | static void isicom_tx(unsigned long _data) | |
391 | { | |
4969b3a4 | 392 | unsigned long flags, base; |
5b21f9dd | 393 | unsigned int retries; |
4969b3a4 | 394 | short count = (BOARD_COUNT-1), card; |
1da177e4 | 395 | short txcount, wrd, residue, word_count, cnt; |
d8d16e47 JS |
396 | struct isi_port *port; |
397 | struct tty_struct *tty; | |
398 | ||
1da177e4 LT |
399 | /* find next active board */ |
400 | card = (prev_card + 1) & 0x0003; | |
251b8dd7 | 401 | while (count-- > 0) { |
d8d16e47 | 402 | if (isi_card[card].status & BOARD_ACTIVE) |
1da177e4 | 403 | break; |
d8d16e47 | 404 | card = (card + 1) & 0x0003; |
1da177e4 LT |
405 | } |
406 | if (!(isi_card[card].status & BOARD_ACTIVE)) | |
407 | goto sched_again; | |
d8d16e47 | 408 | |
1da177e4 | 409 | prev_card = card; |
d8d16e47 | 410 | |
1da177e4 LT |
411 | count = isi_card[card].port_count; |
412 | port = isi_card[card].ports; | |
413 | base = isi_card[card].base; | |
5b21f9dd JS |
414 | |
415 | spin_lock_irqsave(&isi_card[card].card_lock, flags); | |
416 | for (retries = 0; retries < 100; retries++) { | |
417 | if (inw(base + 0xe) & 0x1) | |
418 | break; | |
419 | udelay(2); | |
420 | } | |
421 | if (retries >= 100) | |
422 | goto unlock; | |
423 | ||
251b8dd7 | 424 | for (; count > 0; count--, port++) { |
1da177e4 | 425 | /* port not active or tx disabled to force flow control */ |
f1d03228 | 426 | if (!(port->port.flags & ASYNC_INITIALIZED) || |
d8d16e47 | 427 | !(port->status & ISI_TXOK)) |
1da177e4 | 428 | continue; |
d8d16e47 | 429 | |
f1d03228 | 430 | tty = port->port.tty; |
d8d16e47 | 431 | |
5b21f9dd | 432 | if (tty == NULL) |
1da177e4 | 433 | continue; |
d8d16e47 | 434 | |
1da177e4 | 435 | txcount = min_t(short, TX_SIZE, port->xmit_cnt); |
5b21f9dd | 436 | if (txcount <= 0 || tty->stopped || tty->hw_stopped) |
1da177e4 | 437 | continue; |
5b21f9dd JS |
438 | |
439 | if (!(inw(base + 0x02) & (1 << port->channel))) | |
d8d16e47 | 440 | continue; |
5b21f9dd | 441 | |
aaa246ea JS |
442 | pr_dbg("txing %d bytes, port%d.\n", txcount, |
443 | port->channel + 1); | |
444 | outw((port->channel << isi_card[card].shift_count) | txcount, | |
445 | base); | |
1da177e4 | 446 | residue = NO; |
d8d16e47 | 447 | wrd = 0; |
1da177e4 | 448 | while (1) { |
a547dfe9 JS |
449 | cnt = min_t(int, txcount, (SERIAL_XMIT_SIZE |
450 | - port->xmit_tail)); | |
1da177e4 LT |
451 | if (residue == YES) { |
452 | residue = NO; | |
453 | if (cnt > 0) { | |
f1d03228 | 454 | wrd |= (port->port.xmit_buf[port->xmit_tail] |
a547dfe9 JS |
455 | << 8); |
456 | port->xmit_tail = (port->xmit_tail + 1) | |
457 | & (SERIAL_XMIT_SIZE - 1); | |
1da177e4 LT |
458 | port->xmit_cnt--; |
459 | txcount--; | |
460 | cnt--; | |
d8d16e47 | 461 | outw(wrd, base); |
a547dfe9 | 462 | } else { |
1da177e4 LT |
463 | outw(wrd, base); |
464 | break; | |
465 | } | |
d8d16e47 | 466 | } |
251b8dd7 AC |
467 | if (cnt <= 0) |
468 | break; | |
1da177e4 | 469 | word_count = cnt >> 1; |
f1d03228 | 470 | outsw(base, port->port.xmit_buf+port->xmit_tail, word_count); |
a547dfe9 JS |
471 | port->xmit_tail = (port->xmit_tail |
472 | + (word_count << 1)) & (SERIAL_XMIT_SIZE - 1); | |
1da177e4 LT |
473 | txcount -= (word_count << 1); |
474 | port->xmit_cnt -= (word_count << 1); | |
475 | if (cnt & 0x0001) { | |
476 | residue = YES; | |
f1d03228 | 477 | wrd = port->port.xmit_buf[port->xmit_tail]; |
a547dfe9 JS |
478 | port->xmit_tail = (port->xmit_tail + 1) |
479 | & (SERIAL_XMIT_SIZE - 1); | |
1da177e4 LT |
480 | port->xmit_cnt--; |
481 | txcount--; | |
482 | } | |
483 | } | |
484 | ||
485 | InterruptTheCard(base); | |
486 | if (port->xmit_cnt <= 0) | |
487 | port->status &= ~ISI_TXOK; | |
488 | if (port->xmit_cnt <= WAKEUP_CHARS) | |
0aa5de85 | 489 | tty_wakeup(tty); |
d8d16e47 | 490 | } |
1da177e4 | 491 | |
5b21f9dd JS |
492 | unlock: |
493 | spin_unlock_irqrestore(&isi_card[card].card_lock, flags); | |
d8d16e47 JS |
494 | /* schedule another tx for hopefully in about 10ms */ |
495 | sched_again: | |
34b55b86 | 496 | mod_timer(&tx, jiffies + msecs_to_jiffies(10)); |
d8d16e47 JS |
497 | } |
498 | ||
1da177e4 | 499 | /* |
d8d16e47 | 500 | * Main interrupt handler routine |
1da177e4 | 501 | */ |
d8d16e47 | 502 | |
7d12e780 | 503 | static irqreturn_t isicom_interrupt(int irq, void *dev_id) |
1da177e4 | 504 | { |
8070e35c | 505 | struct isi_board *card = dev_id; |
d8d16e47 JS |
506 | struct isi_port *port; |
507 | struct tty_struct *tty; | |
8070e35c JS |
508 | unsigned long base; |
509 | u16 header, word_count, count, channel; | |
1da177e4 | 510 | short byte_count; |
33f0f88f | 511 | unsigned char *rp; |
d8d16e47 | 512 | |
1da177e4 LT |
513 | if (!card || !(card->status & FIRMWARE_LOADED)) |
514 | return IRQ_NONE; | |
d8d16e47 | 515 | |
1da177e4 | 516 | base = card->base; |
cb4a10cc JS |
517 | |
518 | /* did the card interrupt us? */ | |
519 | if (!(inw(base + 0x0e) & 0x02)) | |
520 | return IRQ_NONE; | |
521 | ||
1da177e4 | 522 | spin_lock(&card->card_lock); |
d8d16e47 | 523 | |
18234f88 JS |
524 | /* |
525 | * disable any interrupts from the PCI card and lower the | |
526 | * interrupt line | |
527 | */ | |
528 | outw(0x8000, base+0x04); | |
529 | ClearInterrupt(base); | |
d8d16e47 | 530 | |
1da177e4 LT |
531 | inw(base); /* get the dummy word out */ |
532 | header = inw(base); | |
533 | channel = (header & 0x7800) >> card->shift_count; | |
534 | byte_count = header & 0xff; | |
535 | ||
536 | if (channel + 1 > card->port_count) { | |
a547dfe9 JS |
537 | printk(KERN_WARNING "ISICOM: isicom_interrupt(0x%lx): " |
538 | "%d(channel) > port_count.\n", base, channel+1); | |
18234f88 | 539 | outw(0x0000, base+0x04); /* enable interrupts */ |
1da177e4 | 540 | spin_unlock(&card->card_lock); |
d8d16e47 | 541 | return IRQ_HANDLED; |
1da177e4 LT |
542 | } |
543 | port = card->ports + channel; | |
f1d03228 | 544 | if (!(port->port.flags & ASYNC_INITIALIZED)) { |
18234f88 | 545 | outw(0x0000, base+0x04); /* enable interrupts */ |
174f1307 | 546 | spin_unlock(&card->card_lock); |
1da177e4 | 547 | return IRQ_HANDLED; |
d8d16e47 JS |
548 | } |
549 | ||
f1d03228 | 550 | tty = port->port.tty; |
1da177e4 LT |
551 | if (tty == NULL) { |
552 | word_count = byte_count >> 1; | |
251b8dd7 | 553 | while (byte_count > 1) { |
1da177e4 LT |
554 | inw(base); |
555 | byte_count -= 2; | |
556 | } | |
557 | if (byte_count & 0x01) | |
558 | inw(base); | |
18234f88 | 559 | outw(0x0000, base+0x04); /* enable interrupts */ |
1da177e4 LT |
560 | spin_unlock(&card->card_lock); |
561 | return IRQ_HANDLED; | |
562 | } | |
d8d16e47 | 563 | |
1da177e4 LT |
564 | if (header & 0x8000) { /* Status Packet */ |
565 | header = inw(base); | |
251b8dd7 | 566 | switch (header & 0xff) { |
d8d16e47 | 567 | case 0: /* Change in EIA signals */ |
f1d03228 | 568 | if (port->port.flags & ASYNC_CHECK_CD) { |
d8d16e47 JS |
569 | if (port->status & ISI_DCD) { |
570 | if (!(header & ISI_DCD)) { | |
571 | /* Carrier has been lost */ | |
a547dfe9 JS |
572 | pr_dbg("interrupt: DCD->low.\n" |
573 | ); | |
d8d16e47 | 574 | port->status &= ~ISI_DCD; |
0aa5de85 | 575 | tty_hangup(tty); |
1da177e4 | 576 | } |
a547dfe9 JS |
577 | } else if (header & ISI_DCD) { |
578 | /* Carrier has been detected */ | |
579 | pr_dbg("interrupt: DCD->high.\n"); | |
580 | port->status |= ISI_DCD; | |
f1d03228 | 581 | wake_up_interruptible(&port->port.open_wait); |
1da177e4 | 582 | } |
a547dfe9 | 583 | } else { |
d8d16e47 JS |
584 | if (header & ISI_DCD) |
585 | port->status |= ISI_DCD; | |
586 | else | |
587 | port->status &= ~ISI_DCD; | |
588 | } | |
589 | ||
f1d03228 AC |
590 | if (port->port.flags & ASYNC_CTS_FLOW) { |
591 | if (port->port.tty->hw_stopped) { | |
d8d16e47 | 592 | if (header & ISI_CTS) { |
f1d03228 | 593 | port->port.tty->hw_stopped = 0; |
d8d16e47 | 594 | /* start tx ing */ |
a547dfe9 JS |
595 | port->status |= (ISI_TXOK |
596 | | ISI_CTS); | |
0aa5de85 | 597 | tty_wakeup(tty); |
1da177e4 | 598 | } |
a547dfe9 | 599 | } else if (!(header & ISI_CTS)) { |
f1d03228 | 600 | port->port.tty->hw_stopped = 1; |
a547dfe9 JS |
601 | /* stop tx ing */ |
602 | port->status &= ~(ISI_TXOK | ISI_CTS); | |
1da177e4 | 603 | } |
a547dfe9 | 604 | } else { |
d8d16e47 JS |
605 | if (header & ISI_CTS) |
606 | port->status |= ISI_CTS; | |
1da177e4 | 607 | else |
d8d16e47 JS |
608 | port->status &= ~ISI_CTS; |
609 | } | |
610 | ||
611 | if (header & ISI_DSR) | |
612 | port->status |= ISI_DSR; | |
613 | else | |
614 | port->status &= ~ISI_DSR; | |
615 | ||
616 | if (header & ISI_RI) | |
617 | port->status |= ISI_RI; | |
618 | else | |
619 | port->status &= ~ISI_RI; | |
620 | ||
621 | break; | |
622 | ||
a547dfe9 | 623 | case 1: /* Received Break !!! */ |
d8d16e47 | 624 | tty_insert_flip_char(tty, 0, TTY_BREAK); |
f1d03228 | 625 | if (port->port.flags & ASYNC_SAK) |
d8d16e47 JS |
626 | do_SAK(tty); |
627 | tty_flip_buffer_push(tty); | |
628 | break; | |
629 | ||
630 | case 2: /* Statistics */ | |
aaa246ea | 631 | pr_dbg("isicom_interrupt: stats!!!.\n"); |
d8d16e47 JS |
632 | break; |
633 | ||
634 | default: | |
aaa246ea | 635 | pr_dbg("Intr: Unknown code in status packet.\n"); |
d8d16e47 JS |
636 | break; |
637 | } | |
a547dfe9 | 638 | } else { /* Data Packet */ |
33f0f88f AC |
639 | |
640 | count = tty_prepare_flip_string(tty, &rp, byte_count & ~1); | |
aaa246ea | 641 | pr_dbg("Intr: Can rx %d of %d bytes.\n", count, byte_count); |
1da177e4 | 642 | word_count = count >> 1; |
33f0f88f | 643 | insw(base, rp, word_count); |
1da177e4 LT |
644 | byte_count -= (word_count << 1); |
645 | if (count & 0x0001) { | |
a547dfe9 JS |
646 | tty_insert_flip_char(tty, inw(base) & 0xff, |
647 | TTY_NORMAL); | |
1da177e4 | 648 | byte_count -= 2; |
d8d16e47 | 649 | } |
1da177e4 | 650 | if (byte_count > 0) { |
aaa246ea JS |
651 | pr_dbg("Intr(0x%lx:%d): Flip buffer overflow! dropping " |
652 | "bytes...\n", base, channel + 1); | |
251b8dd7 AC |
653 | /* drain out unread xtra data */ |
654 | while (byte_count > 0) { | |
1da177e4 LT |
655 | inw(base); |
656 | byte_count -= 2; | |
657 | } | |
658 | } | |
33f0f88f | 659 | tty_flip_buffer_push(tty); |
1da177e4 | 660 | } |
18234f88 | 661 | outw(0x0000, base+0x04); /* enable interrupts */ |
174f1307 | 662 | spin_unlock(&card->card_lock); |
a547dfe9 | 663 | |
1da177e4 | 664 | return IRQ_HANDLED; |
d8d16e47 | 665 | } |
1da177e4 | 666 | |
d8d16e47 | 667 | static void isicom_config_port(struct isi_port *port) |
1da177e4 | 668 | { |
d8d16e47 JS |
669 | struct isi_board *card = port->card; |
670 | struct tty_struct *tty; | |
1da177e4 | 671 | unsigned long baud; |
8070e35c JS |
672 | unsigned long base = card->base; |
673 | u16 channel_setup, channel = port->channel, | |
674 | shift_count = card->shift_count; | |
1da177e4 | 675 | unsigned char flow_ctrl; |
d8d16e47 | 676 | |
f1d03228 | 677 | tty = port->port.tty; |
251b8dd7 AC |
678 | |
679 | if (tty == NULL) | |
1da177e4 | 680 | return; |
251b8dd7 | 681 | /* FIXME: Switch to new tty baud API */ |
1da177e4 LT |
682 | baud = C_BAUD(tty); |
683 | if (baud & CBAUDEX) { | |
684 | baud &= ~CBAUDEX; | |
d8d16e47 | 685 | |
1da177e4 LT |
686 | /* if CBAUDEX bit is on and the baud is set to either 50 or 75 |
687 | * then the card is programmed for 57.6Kbps or 115Kbps | |
688 | * respectively. | |
d8d16e47 JS |
689 | */ |
690 | ||
7edc136a JS |
691 | /* 1,2,3,4 => 57.6, 115.2, 230, 460 kbps resp. */ |
692 | if (baud < 1 || baud > 4) | |
f1d03228 | 693 | port->port.tty->termios->c_cflag &= ~CBAUDEX; |
1da177e4 LT |
694 | else |
695 | baud += 15; | |
d8d16e47 | 696 | } |
1da177e4 | 697 | if (baud == 15) { |
d8d16e47 JS |
698 | |
699 | /* the ASYNC_SPD_HI and ASYNC_SPD_VHI options are set | |
1da177e4 LT |
700 | * by the set_serial_info ioctl ... this is done by |
701 | * the 'setserial' utility. | |
d8d16e47 JS |
702 | */ |
703 | ||
f1d03228 | 704 | if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) |
d8d16e47 | 705 | baud++; /* 57.6 Kbps */ |
f1d03228 | 706 | if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) |
251b8dd7 | 707 | baud += 2; /* 115 Kbps */ |
f1d03228 | 708 | if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) |
7edc136a | 709 | baud += 3; /* 230 kbps*/ |
f1d03228 | 710 | if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) |
7edc136a | 711 | baud += 4; /* 460 kbps*/ |
1da177e4 LT |
712 | } |
713 | if (linuxb_to_isib[baud] == -1) { | |
714 | /* hang up */ | |
d8d16e47 JS |
715 | drop_dtr(port); |
716 | return; | |
251b8dd7 | 717 | } else |
1da177e4 | 718 | raise_dtr(port); |
d8d16e47 | 719 | |
cfe7c09a | 720 | if (WaitTillCardIsFree(base) == 0) { |
251b8dd7 | 721 | outw(0x8000 | (channel << shift_count) | 0x03, base); |
1da177e4 LT |
722 | outw(linuxb_to_isib[baud] << 8 | 0x03, base); |
723 | channel_setup = 0; | |
251b8dd7 | 724 | switch (C_CSIZE(tty)) { |
d8d16e47 JS |
725 | case CS5: |
726 | channel_setup |= ISICOM_CS5; | |
727 | break; | |
728 | case CS6: | |
729 | channel_setup |= ISICOM_CS6; | |
730 | break; | |
731 | case CS7: | |
732 | channel_setup |= ISICOM_CS7; | |
733 | break; | |
734 | case CS8: | |
735 | channel_setup |= ISICOM_CS8; | |
736 | break; | |
1da177e4 | 737 | } |
d8d16e47 | 738 | |
1da177e4 LT |
739 | if (C_CSTOPB(tty)) |
740 | channel_setup |= ISICOM_2SB; | |
741 | if (C_PARENB(tty)) { | |
742 | channel_setup |= ISICOM_EVPAR; | |
743 | if (C_PARODD(tty)) | |
d8d16e47 | 744 | channel_setup |= ISICOM_ODPAR; |
1da177e4 | 745 | } |
d8d16e47 | 746 | outw(channel_setup, base); |
1da177e4 | 747 | InterruptTheCard(base); |
d8d16e47 | 748 | } |
1da177e4 | 749 | if (C_CLOCAL(tty)) |
f1d03228 | 750 | port->port.flags &= ~ASYNC_CHECK_CD; |
1da177e4 | 751 | else |
f1d03228 | 752 | port->port.flags |= ASYNC_CHECK_CD; |
d8d16e47 | 753 | |
1da177e4 LT |
754 | /* flow control settings ...*/ |
755 | flow_ctrl = 0; | |
f1d03228 | 756 | port->port.flags &= ~ASYNC_CTS_FLOW; |
1da177e4 | 757 | if (C_CRTSCTS(tty)) { |
f1d03228 | 758 | port->port.flags |= ASYNC_CTS_FLOW; |
1da177e4 | 759 | flow_ctrl |= ISICOM_CTSRTS; |
d8d16e47 JS |
760 | } |
761 | if (I_IXON(tty)) | |
1da177e4 LT |
762 | flow_ctrl |= ISICOM_RESPOND_XONXOFF; |
763 | if (I_IXOFF(tty)) | |
d8d16e47 JS |
764 | flow_ctrl |= ISICOM_INITIATE_XONXOFF; |
765 | ||
cfe7c09a | 766 | if (WaitTillCardIsFree(base) == 0) { |
251b8dd7 | 767 | outw(0x8000 | (channel << shift_count) | 0x04, base); |
1da177e4 LT |
768 | outw(flow_ctrl << 8 | 0x05, base); |
769 | outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base); | |
770 | InterruptTheCard(base); | |
1da177e4 | 771 | } |
d8d16e47 | 772 | |
1da177e4 LT |
773 | /* rx enabled -> enable port for rx on the card */ |
774 | if (C_CREAD(tty)) { | |
775 | card->port_status |= (1 << channel); | |
776 | outw(card->port_status, base + 0x02); | |
777 | } | |
778 | } | |
1da177e4 | 779 | |
d8d16e47 JS |
780 | /* open et all */ |
781 | ||
782 | static inline void isicom_setup_board(struct isi_board *bp) | |
1da177e4 LT |
783 | { |
784 | int channel; | |
d8d16e47 | 785 | struct isi_port *port; |
1da177e4 | 786 | unsigned long flags; |
d8d16e47 | 787 | |
1da177e4 LT |
788 | spin_lock_irqsave(&bp->card_lock, flags); |
789 | if (bp->status & BOARD_ACTIVE) { | |
790 | spin_unlock_irqrestore(&bp->card_lock, flags); | |
791 | return; | |
792 | } | |
793 | port = bp->ports; | |
794 | bp->status |= BOARD_ACTIVE; | |
d8d16e47 | 795 | for (channel = 0; channel < bp->port_count; channel++, port++) |
1da177e4 | 796 | drop_dtr_rts(port); |
cfe7c09a | 797 | spin_unlock_irqrestore(&bp->card_lock, flags); |
1da177e4 | 798 | } |
d8d16e47 JS |
799 | |
800 | static int isicom_setup_port(struct isi_port *port) | |
1da177e4 | 801 | { |
d8d16e47 | 802 | struct isi_board *card = port->card; |
1da177e4 | 803 | unsigned long flags; |
d8d16e47 | 804 | |
f1d03228 | 805 | if (port->port.flags & ASYNC_INITIALIZED) |
1da177e4 | 806 | return 0; |
f1d03228 AC |
807 | if (tty_port_alloc_xmit_buf(&port->port) < 0) |
808 | return -ENOMEM; | |
1da177e4 LT |
809 | |
810 | spin_lock_irqsave(&card->card_lock, flags); | |
f1d03228 AC |
811 | if (port->port.tty) |
812 | clear_bit(TTY_IO_ERROR, &port->port.tty->flags); | |
813 | if (port->port.count == 1) | |
1da177e4 | 814 | card->count++; |
d8d16e47 | 815 | |
1da177e4 | 816 | port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; |
d8d16e47 | 817 | |
1da177e4 | 818 | /* discard any residual data */ |
cfe7c09a JS |
819 | if (WaitTillCardIsFree(card->base) == 0) { |
820 | outw(0x8000 | (port->channel << card->shift_count) | 0x02, | |
821 | card->base); | |
822 | outw(((ISICOM_KILLTX | ISICOM_KILLRX) << 8) | 0x06, card->base); | |
823 | InterruptTheCard(card->base); | |
824 | } | |
d8d16e47 | 825 | |
1da177e4 | 826 | isicom_config_port(port); |
f1d03228 | 827 | port->port.flags |= ASYNC_INITIALIZED; |
1da177e4 | 828 | spin_unlock_irqrestore(&card->card_lock, flags); |
d8d16e47 JS |
829 | |
830 | return 0; | |
831 | } | |
832 | ||
a547dfe9 JS |
833 | static int block_til_ready(struct tty_struct *tty, struct file *filp, |
834 | struct isi_port *port) | |
1da177e4 | 835 | { |
d8d16e47 | 836 | struct isi_board *card = port->card; |
1da177e4 LT |
837 | int do_clocal = 0, retval; |
838 | unsigned long flags; | |
839 | DECLARE_WAITQUEUE(wait, current); | |
840 | ||
841 | /* block if port is in the process of being closed */ | |
842 | ||
f1d03228 | 843 | if (tty_hung_up_p(filp) || port->port.flags & ASYNC_CLOSING) { |
aaa246ea | 844 | pr_dbg("block_til_ready: close in progress.\n"); |
f1d03228 AC |
845 | interruptible_sleep_on(&port->port.close_wait); |
846 | if (port->port.flags & ASYNC_HUP_NOTIFY) | |
1da177e4 LT |
847 | return -EAGAIN; |
848 | else | |
849 | return -ERESTARTSYS; | |
850 | } | |
d8d16e47 | 851 | |
1da177e4 | 852 | /* if non-blocking mode is set ... */ |
d8d16e47 | 853 | |
a547dfe9 JS |
854 | if ((filp->f_flags & O_NONBLOCK) || |
855 | (tty->flags & (1 << TTY_IO_ERROR))) { | |
aaa246ea | 856 | pr_dbg("block_til_ready: non-block mode.\n"); |
f1d03228 | 857 | port->port.flags |= ASYNC_NORMAL_ACTIVE; |
d8d16e47 JS |
858 | return 0; |
859 | } | |
860 | ||
1da177e4 LT |
861 | if (C_CLOCAL(tty)) |
862 | do_clocal = 1; | |
d8d16e47 JS |
863 | |
864 | /* block waiting for DCD to be asserted, and while | |
1da177e4 LT |
865 | callout dev is busy */ |
866 | retval = 0; | |
f1d03228 | 867 | add_wait_queue(&port->port.open_wait, &wait); |
1da177e4 LT |
868 | |
869 | spin_lock_irqsave(&card->card_lock, flags); | |
870 | if (!tty_hung_up_p(filp)) | |
f1d03228 AC |
871 | port->port.count--; |
872 | port->port.blocked_open++; | |
1da177e4 | 873 | spin_unlock_irqrestore(&card->card_lock, flags); |
d8d16e47 | 874 | |
1da177e4 LT |
875 | while (1) { |
876 | raise_dtr_rts(port); | |
877 | ||
878 | set_current_state(TASK_INTERRUPTIBLE); | |
f1d03228 AC |
879 | if (tty_hung_up_p(filp) || !(port->port.flags & ASYNC_INITIALIZED)) { |
880 | if (port->port.flags & ASYNC_HUP_NOTIFY) | |
1da177e4 LT |
881 | retval = -EAGAIN; |
882 | else | |
883 | retval = -ERESTARTSYS; | |
884 | break; | |
d8d16e47 | 885 | } |
f1d03228 | 886 | if (!(port->port.flags & ASYNC_CLOSING) && |
d8d16e47 | 887 | (do_clocal || (port->status & ISI_DCD))) { |
1da177e4 | 888 | break; |
d8d16e47 | 889 | } |
1da177e4 LT |
890 | if (signal_pending(current)) { |
891 | retval = -ERESTARTSYS; | |
892 | break; | |
893 | } | |
d8d16e47 | 894 | schedule(); |
1da177e4 LT |
895 | } |
896 | set_current_state(TASK_RUNNING); | |
f1d03228 | 897 | remove_wait_queue(&port->port.open_wait, &wait); |
1da177e4 LT |
898 | spin_lock_irqsave(&card->card_lock, flags); |
899 | if (!tty_hung_up_p(filp)) | |
f1d03228 AC |
900 | port->port.count++; |
901 | port->port.blocked_open--; | |
1da177e4 LT |
902 | spin_unlock_irqrestore(&card->card_lock, flags); |
903 | if (retval) | |
904 | return retval; | |
f1d03228 | 905 | port->port.flags |= ASYNC_NORMAL_ACTIVE; |
1da177e4 LT |
906 | return 0; |
907 | } | |
d8d16e47 JS |
908 | |
909 | static int isicom_open(struct tty_struct *tty, struct file *filp) | |
1da177e4 | 910 | { |
d8d16e47 JS |
911 | struct isi_port *port; |
912 | struct isi_board *card; | |
17c4edf0 JS |
913 | unsigned int board; |
914 | int error, line; | |
1da177e4 LT |
915 | |
916 | line = tty->index; | |
917 | if (line < 0 || line > PORT_COUNT-1) | |
918 | return -ENODEV; | |
919 | board = BOARD(line); | |
920 | card = &isi_card[board]; | |
d8d16e47 | 921 | |
1da177e4 LT |
922 | if (!(card->status & FIRMWARE_LOADED)) |
923 | return -ENODEV; | |
d8d16e47 | 924 | |
1da177e4 LT |
925 | /* open on a port greater than the port count for the card !!! */ |
926 | if (line > ((board * 16) + card->port_count - 1)) | |
927 | return -ENODEV; | |
928 | ||
d8d16e47 | 929 | port = &isi_ports[line]; |
1da177e4 LT |
930 | if (isicom_paranoia_check(port, tty->name, "isicom_open")) |
931 | return -ENODEV; | |
d8d16e47 JS |
932 | |
933 | isicom_setup_board(card); | |
934 | ||
f1d03228 | 935 | port->port.count++; |
1da177e4 | 936 | tty->driver_data = port; |
f1d03228 | 937 | port->port.tty = tty; |
251b8dd7 AC |
938 | error = isicom_setup_port(port); |
939 | if (error == 0) | |
940 | error = block_til_ready(tty, filp, port); | |
941 | return error; | |
1da177e4 | 942 | } |
d8d16e47 | 943 | |
1da177e4 LT |
944 | /* close et all */ |
945 | ||
d8d16e47 | 946 | static inline void isicom_shutdown_board(struct isi_board *bp) |
1da177e4 | 947 | { |
251b8dd7 | 948 | if (bp->status & BOARD_ACTIVE) |
1da177e4 | 949 | bp->status &= ~BOARD_ACTIVE; |
1da177e4 LT |
950 | } |
951 | ||
cfe7c09a | 952 | /* card->lock HAS to be held */ |
d8d16e47 | 953 | static void isicom_shutdown_port(struct isi_port *port) |
1da177e4 | 954 | { |
d8d16e47 JS |
955 | struct isi_board *card = port->card; |
956 | struct tty_struct *tty; | |
d8d16e47 | 957 | |
f1d03228 | 958 | tty = port->port.tty; |
1da177e4 | 959 | |
f1d03228 | 960 | if (!(port->port.flags & ASYNC_INITIALIZED)) |
1da177e4 | 961 | return; |
cfe7c09a | 962 | |
f1d03228 AC |
963 | tty_port_free_xmit_buf(&port->port); |
964 | port->port.flags &= ~ASYNC_INITIALIZED; | |
1da177e4 | 965 | /* 3rd October 2000 : Vinayak P Risbud */ |
f1d03228 | 966 | port->port.tty = NULL; |
d8d16e47 | 967 | |
1da177e4 LT |
968 | /*Fix done by Anil .S on 30-04-2001 |
969 | remote login through isi port has dtr toggle problem | |
970 | due to which the carrier drops before the password prompt | |
d8d16e47 | 971 | appears on the remote end. Now we drop the dtr only if the |
1da177e4 | 972 | HUPCL(Hangup on close) flag is set for the tty*/ |
d8d16e47 JS |
973 | |
974 | if (C_HUPCL(tty)) | |
1da177e4 LT |
975 | /* drop dtr on this port */ |
976 | drop_dtr(port); | |
d8d16e47 JS |
977 | |
978 | /* any other port uninits */ | |
1da177e4 LT |
979 | if (tty) |
980 | set_bit(TTY_IO_ERROR, &tty->flags); | |
d8d16e47 | 981 | |
1da177e4 | 982 | if (--card->count < 0) { |
aaa246ea | 983 | pr_dbg("isicom_shutdown_port: bad board(0x%lx) count %d.\n", |
1da177e4 | 984 | card->base, card->count); |
d8d16e47 | 985 | card->count = 0; |
1da177e4 | 986 | } |
d8d16e47 | 987 | |
a547dfe9 | 988 | /* last port was closed, shutdown that boad too */ |
d8d16e47 | 989 | if (C_HUPCL(tty)) { |
1da177e4 LT |
990 | if (!card->count) |
991 | isicom_shutdown_board(card); | |
992 | } | |
993 | } | |
994 | ||
978e595f AC |
995 | static void isicom_flush_buffer(struct tty_struct *tty) |
996 | { | |
997 | struct isi_port *port = tty->driver_data; | |
998 | struct isi_board *card = port->card; | |
999 | unsigned long flags; | |
1000 | ||
1001 | if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer")) | |
1002 | return; | |
1003 | ||
1004 | spin_lock_irqsave(&card->card_lock, flags); | |
1005 | port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; | |
1006 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1007 | ||
1008 | tty_wakeup(tty); | |
1009 | } | |
1010 | ||
d8d16e47 | 1011 | static void isicom_close(struct tty_struct *tty, struct file *filp) |
1da177e4 | 1012 | { |
8070e35c | 1013 | struct isi_port *port = tty->driver_data; |
c387fd85 | 1014 | struct isi_board *card; |
1da177e4 | 1015 | unsigned long flags; |
d8d16e47 | 1016 | |
1da177e4 LT |
1017 | if (!port) |
1018 | return; | |
c387fd85 | 1019 | card = port->card; |
1da177e4 LT |
1020 | if (isicom_paranoia_check(port, tty->name, "isicom_close")) |
1021 | return; | |
d8d16e47 | 1022 | |
aaa246ea | 1023 | pr_dbg("Close start!!!.\n"); |
d8d16e47 | 1024 | |
1da177e4 LT |
1025 | spin_lock_irqsave(&card->card_lock, flags); |
1026 | if (tty_hung_up_p(filp)) { | |
1027 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1028 | return; | |
1029 | } | |
d8d16e47 | 1030 | |
f1d03228 | 1031 | if (tty->count == 1 && port->port.count != 1) { |
a547dfe9 JS |
1032 | printk(KERN_WARNING "ISICOM:(0x%lx) isicom_close: bad port " |
1033 | "count tty->count = 1 port count = %d.\n", | |
f1d03228 AC |
1034 | card->base, port->port.count); |
1035 | port->port.count = 1; | |
1da177e4 | 1036 | } |
f1d03228 | 1037 | if (--port->port.count < 0) { |
a547dfe9 JS |
1038 | printk(KERN_WARNING "ISICOM:(0x%lx) isicom_close: bad port " |
1039 | "count for channel%d = %d", card->base, port->channel, | |
f1d03228 AC |
1040 | port->port.count); |
1041 | port->port.count = 0; | |
1da177e4 | 1042 | } |
d8d16e47 | 1043 | |
f1d03228 | 1044 | if (port->port.count) { |
1da177e4 LT |
1045 | spin_unlock_irqrestore(&card->card_lock, flags); |
1046 | return; | |
d8d16e47 | 1047 | } |
f1d03228 | 1048 | port->port.flags |= ASYNC_CLOSING; |
1da177e4 LT |
1049 | tty->closing = 1; |
1050 | spin_unlock_irqrestore(&card->card_lock, flags); | |
d8d16e47 | 1051 | |
44b7d1b3 AC |
1052 | if (port->port.closing_wait != ASYNC_CLOSING_WAIT_NONE) |
1053 | tty_wait_until_sent(tty, port->port.closing_wait); | |
d8d16e47 | 1054 | /* indicate to the card that no more data can be received |
1da177e4 LT |
1055 | on this port */ |
1056 | spin_lock_irqsave(&card->card_lock, flags); | |
f1d03228 | 1057 | if (port->port.flags & ASYNC_INITIALIZED) { |
1da177e4 LT |
1058 | card->port_status &= ~(1 << port->channel); |
1059 | outw(card->port_status, card->base + 0x02); | |
d8d16e47 | 1060 | } |
1da177e4 LT |
1061 | isicom_shutdown_port(port); |
1062 | spin_unlock_irqrestore(&card->card_lock, flags); | |
d8d16e47 | 1063 | |
978e595f | 1064 | isicom_flush_buffer(tty); |
1da177e4 LT |
1065 | tty_ldisc_flush(tty); |
1066 | ||
1067 | spin_lock_irqsave(&card->card_lock, flags); | |
1068 | tty->closing = 0; | |
1069 | ||
f1d03228 | 1070 | if (port->port.blocked_open) { |
1da177e4 | 1071 | spin_unlock_irqrestore(&card->card_lock, flags); |
44b7d1b3 | 1072 | if (port->port.close_delay) { |
aaa246ea | 1073 | pr_dbg("scheduling until time out.\n"); |
a547dfe9 | 1074 | msleep_interruptible( |
44b7d1b3 | 1075 | jiffies_to_msecs(port->port.close_delay)); |
1da177e4 LT |
1076 | } |
1077 | spin_lock_irqsave(&card->card_lock, flags); | |
f1d03228 | 1078 | wake_up_interruptible(&port->port.open_wait); |
d8d16e47 | 1079 | } |
f1d03228 AC |
1080 | port->port.flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING); |
1081 | wake_up_interruptible(&port->port.close_wait); | |
1da177e4 LT |
1082 | spin_unlock_irqrestore(&card->card_lock, flags); |
1083 | } | |
1084 | ||
1085 | /* write et all */ | |
d8d16e47 JS |
1086 | static int isicom_write(struct tty_struct *tty, const unsigned char *buf, |
1087 | int count) | |
1da177e4 | 1088 | { |
8070e35c | 1089 | struct isi_port *port = tty->driver_data; |
d8d16e47 | 1090 | struct isi_board *card = port->card; |
1da177e4 LT |
1091 | unsigned long flags; |
1092 | int cnt, total = 0; | |
1093 | ||
1094 | if (isicom_paranoia_check(port, tty->name, "isicom_write")) | |
1095 | return 0; | |
d8d16e47 | 1096 | |
1da177e4 | 1097 | spin_lock_irqsave(&card->card_lock, flags); |
d8d16e47 | 1098 | |
251b8dd7 | 1099 | while (1) { |
a547dfe9 JS |
1100 | cnt = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt |
1101 | - 1, SERIAL_XMIT_SIZE - port->xmit_head)); | |
d8d16e47 | 1102 | if (cnt <= 0) |
1da177e4 | 1103 | break; |
d8d16e47 | 1104 | |
f1d03228 | 1105 | memcpy(port->port.xmit_buf + port->xmit_head, buf, cnt); |
a547dfe9 JS |
1106 | port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE |
1107 | - 1); | |
1da177e4 LT |
1108 | port->xmit_cnt += cnt; |
1109 | buf += cnt; | |
1110 | count -= cnt; | |
1111 | total += cnt; | |
d8d16e47 | 1112 | } |
1da177e4 LT |
1113 | if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped) |
1114 | port->status |= ISI_TXOK; | |
1115 | spin_unlock_irqrestore(&card->card_lock, flags); | |
d8d16e47 | 1116 | return total; |
1da177e4 LT |
1117 | } |
1118 | ||
1119 | /* put_char et all */ | |
f34d7a5b | 1120 | static int isicom_put_char(struct tty_struct *tty, unsigned char ch) |
1da177e4 | 1121 | { |
8070e35c | 1122 | struct isi_port *port = tty->driver_data; |
d8d16e47 | 1123 | struct isi_board *card = port->card; |
1da177e4 | 1124 | unsigned long flags; |
d8d16e47 | 1125 | |
1da177e4 | 1126 | if (isicom_paranoia_check(port, tty->name, "isicom_put_char")) |
f34d7a5b | 1127 | return 0; |
d8d16e47 | 1128 | |
1da177e4 | 1129 | spin_lock_irqsave(&card->card_lock, flags); |
f34d7a5b AC |
1130 | if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) { |
1131 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1132 | return 0; | |
1133 | } | |
d8d16e47 | 1134 | |
f1d03228 | 1135 | port->port.xmit_buf[port->xmit_head++] = ch; |
1da177e4 LT |
1136 | port->xmit_head &= (SERIAL_XMIT_SIZE - 1); |
1137 | port->xmit_cnt++; | |
1138 | spin_unlock_irqrestore(&card->card_lock, flags); | |
f34d7a5b | 1139 | return 1; |
1da177e4 LT |
1140 | } |
1141 | ||
1142 | /* flush_chars et all */ | |
d8d16e47 | 1143 | static void isicom_flush_chars(struct tty_struct *tty) |
1da177e4 | 1144 | { |
8070e35c | 1145 | struct isi_port *port = tty->driver_data; |
d8d16e47 | 1146 | |
1da177e4 LT |
1147 | if (isicom_paranoia_check(port, tty->name, "isicom_flush_chars")) |
1148 | return; | |
d8d16e47 | 1149 | |
a547dfe9 | 1150 | if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped || |
f1d03228 | 1151 | !port->port.xmit_buf) |
1da177e4 | 1152 | return; |
d8d16e47 | 1153 | |
1da177e4 LT |
1154 | /* this tells the transmitter to consider this port for |
1155 | data output to the card ... that's the best we can do. */ | |
d8d16e47 | 1156 | port->status |= ISI_TXOK; |
1da177e4 LT |
1157 | } |
1158 | ||
1159 | /* write_room et all */ | |
d8d16e47 | 1160 | static int isicom_write_room(struct tty_struct *tty) |
1da177e4 | 1161 | { |
8070e35c | 1162 | struct isi_port *port = tty->driver_data; |
1da177e4 LT |
1163 | int free; |
1164 | ||
1165 | if (isicom_paranoia_check(port, tty->name, "isicom_write_room")) | |
1166 | return 0; | |
d8d16e47 | 1167 | |
1da177e4 LT |
1168 | free = SERIAL_XMIT_SIZE - port->xmit_cnt - 1; |
1169 | if (free < 0) | |
1170 | free = 0; | |
1171 | return free; | |
1172 | } | |
1173 | ||
1174 | /* chars_in_buffer et all */ | |
d8d16e47 | 1175 | static int isicom_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 1176 | { |
8070e35c | 1177 | struct isi_port *port = tty->driver_data; |
1da177e4 LT |
1178 | if (isicom_paranoia_check(port, tty->name, "isicom_chars_in_buffer")) |
1179 | return 0; | |
1180 | return port->xmit_cnt; | |
1181 | } | |
1182 | ||
1183 | /* ioctl et all */ | |
a547dfe9 JS |
1184 | static inline void isicom_send_break(struct isi_port *port, |
1185 | unsigned long length) | |
1da177e4 | 1186 | { |
d8d16e47 | 1187 | struct isi_board *card = port->card; |
8070e35c | 1188 | unsigned long base = card->base; |
d8d16e47 JS |
1189 | |
1190 | if (!lock_card(card)) | |
1da177e4 | 1191 | return; |
d8d16e47 | 1192 | |
1da177e4 LT |
1193 | outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base); |
1194 | outw((length & 0xff) << 8 | 0x00, base); | |
1195 | outw((length & 0xff00), base); | |
1196 | InterruptTheCard(base); | |
1197 | ||
1198 | unlock_card(card); | |
1199 | } | |
1200 | ||
1201 | static int isicom_tiocmget(struct tty_struct *tty, struct file *file) | |
1202 | { | |
8070e35c | 1203 | struct isi_port *port = tty->driver_data; |
1da177e4 | 1204 | /* just send the port status */ |
8070e35c | 1205 | u16 status = port->status; |
1da177e4 LT |
1206 | |
1207 | if (isicom_paranoia_check(port, tty->name, "isicom_ioctl")) | |
1208 | return -ENODEV; | |
d8d16e47 | 1209 | |
1da177e4 LT |
1210 | return ((status & ISI_RTS) ? TIOCM_RTS : 0) | |
1211 | ((status & ISI_DTR) ? TIOCM_DTR : 0) | | |
1212 | ((status & ISI_DCD) ? TIOCM_CAR : 0) | | |
1213 | ((status & ISI_DSR) ? TIOCM_DSR : 0) | | |
1214 | ((status & ISI_CTS) ? TIOCM_CTS : 0) | | |
1215 | ((status & ISI_RI ) ? TIOCM_RI : 0); | |
1216 | } | |
1217 | ||
1218 | static int isicom_tiocmset(struct tty_struct *tty, struct file *file, | |
d8d16e47 | 1219 | unsigned int set, unsigned int clear) |
1da177e4 | 1220 | { |
8070e35c | 1221 | struct isi_port *port = tty->driver_data; |
cfe7c09a | 1222 | unsigned long flags; |
d8d16e47 | 1223 | |
1da177e4 LT |
1224 | if (isicom_paranoia_check(port, tty->name, "isicom_ioctl")) |
1225 | return -ENODEV; | |
d8d16e47 | 1226 | |
cfe7c09a | 1227 | spin_lock_irqsave(&port->card->card_lock, flags); |
1da177e4 LT |
1228 | if (set & TIOCM_RTS) |
1229 | raise_rts(port); | |
1230 | if (set & TIOCM_DTR) | |
1231 | raise_dtr(port); | |
1232 | ||
1233 | if (clear & TIOCM_RTS) | |
1234 | drop_rts(port); | |
1235 | if (clear & TIOCM_DTR) | |
1236 | drop_dtr(port); | |
cfe7c09a | 1237 | spin_unlock_irqrestore(&port->card->card_lock, flags); |
1da177e4 LT |
1238 | |
1239 | return 0; | |
d8d16e47 | 1240 | } |
1da177e4 | 1241 | |
d8d16e47 JS |
1242 | static int isicom_set_serial_info(struct isi_port *port, |
1243 | struct serial_struct __user *info) | |
1da177e4 LT |
1244 | { |
1245 | struct serial_struct newinfo; | |
1246 | int reconfig_port; | |
1247 | ||
d8d16e47 | 1248 | if (copy_from_user(&newinfo, info, sizeof(newinfo))) |
1da177e4 | 1249 | return -EFAULT; |
d8d16e47 | 1250 | |
1eac4947 AC |
1251 | lock_kernel(); |
1252 | ||
f1d03228 | 1253 | reconfig_port = ((port->port.flags & ASYNC_SPD_MASK) != |
d8d16e47 JS |
1254 | (newinfo.flags & ASYNC_SPD_MASK)); |
1255 | ||
1da177e4 | 1256 | if (!capable(CAP_SYS_ADMIN)) { |
44b7d1b3 AC |
1257 | if ((newinfo.close_delay != port->port.close_delay) || |
1258 | (newinfo.closing_wait != port->port.closing_wait) || | |
d8d16e47 | 1259 | ((newinfo.flags & ~ASYNC_USR_MASK) != |
f1d03228 | 1260 | (port->port.flags & ~ASYNC_USR_MASK))) { |
1eac4947 | 1261 | unlock_kernel(); |
1da177e4 | 1262 | return -EPERM; |
1eac4947 | 1263 | } |
f1d03228 | 1264 | port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) | |
1da177e4 | 1265 | (newinfo.flags & ASYNC_USR_MASK)); |
251b8dd7 | 1266 | } else { |
44b7d1b3 AC |
1267 | port->port.close_delay = newinfo.close_delay; |
1268 | port->port.closing_wait = newinfo.closing_wait; | |
f1d03228 | 1269 | port->port.flags = ((port->port.flags & ~ASYNC_FLAGS) | |
1da177e4 LT |
1270 | (newinfo.flags & ASYNC_FLAGS)); |
1271 | } | |
1272 | if (reconfig_port) { | |
cfe7c09a JS |
1273 | unsigned long flags; |
1274 | spin_lock_irqsave(&port->card->card_lock, flags); | |
1da177e4 | 1275 | isicom_config_port(port); |
cfe7c09a | 1276 | spin_unlock_irqrestore(&port->card->card_lock, flags); |
1da177e4 | 1277 | } |
1eac4947 | 1278 | unlock_kernel(); |
d8d16e47 JS |
1279 | return 0; |
1280 | } | |
1da177e4 | 1281 | |
d8d16e47 JS |
1282 | static int isicom_get_serial_info(struct isi_port *port, |
1283 | struct serial_struct __user *info) | |
1da177e4 LT |
1284 | { |
1285 | struct serial_struct out_info; | |
d8d16e47 | 1286 | |
1eac4947 | 1287 | lock_kernel(); |
1da177e4 LT |
1288 | memset(&out_info, 0, sizeof(out_info)); |
1289 | /* out_info.type = ? */ | |
1290 | out_info.line = port - isi_ports; | |
1291 | out_info.port = port->card->base; | |
1292 | out_info.irq = port->card->irq; | |
f1d03228 | 1293 | out_info.flags = port->port.flags; |
1da177e4 | 1294 | /* out_info.baud_base = ? */ |
44b7d1b3 AC |
1295 | out_info.close_delay = port->port.close_delay; |
1296 | out_info.closing_wait = port->port.closing_wait; | |
1eac4947 | 1297 | unlock_kernel(); |
d8d16e47 | 1298 | if (copy_to_user(info, &out_info, sizeof(out_info))) |
1da177e4 LT |
1299 | return -EFAULT; |
1300 | return 0; | |
d8d16e47 | 1301 | } |
1da177e4 | 1302 | |
d8d16e47 JS |
1303 | static int isicom_ioctl(struct tty_struct *tty, struct file *filp, |
1304 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1305 | { |
8070e35c | 1306 | struct isi_port *port = tty->driver_data; |
1da177e4 LT |
1307 | void __user *argp = (void __user *)arg; |
1308 | int retval; | |
1309 | ||
1310 | if (isicom_paranoia_check(port, tty->name, "isicom_ioctl")) | |
1311 | return -ENODEV; | |
1312 | ||
251b8dd7 | 1313 | switch (cmd) { |
d8d16e47 JS |
1314 | case TCSBRK: |
1315 | retval = tty_check_change(tty); | |
1316 | if (retval) | |
1317 | return retval; | |
1318 | tty_wait_until_sent(tty, 0); | |
1319 | if (!arg) | |
1320 | isicom_send_break(port, HZ/4); | |
1321 | return 0; | |
1322 | ||
1323 | case TCSBRKP: | |
1324 | retval = tty_check_change(tty); | |
1325 | if (retval) | |
1326 | return retval; | |
1327 | tty_wait_until_sent(tty, 0); | |
1328 | isicom_send_break(port, arg ? arg * (HZ/10) : HZ/4); | |
1329 | return 0; | |
d8d16e47 JS |
1330 | case TIOCGSERIAL: |
1331 | return isicom_get_serial_info(port, argp); | |
1332 | ||
1333 | case TIOCSSERIAL: | |
1334 | return isicom_set_serial_info(port, argp); | |
1335 | ||
1336 | default: | |
1337 | return -ENOIOCTLCMD; | |
1da177e4 LT |
1338 | } |
1339 | return 0; | |
1340 | } | |
1341 | ||
1342 | /* set_termios et all */ | |
d8d16e47 | 1343 | static void isicom_set_termios(struct tty_struct *tty, |
606d099c | 1344 | struct ktermios *old_termios) |
1da177e4 | 1345 | { |
8070e35c | 1346 | struct isi_port *port = tty->driver_data; |
cfe7c09a | 1347 | unsigned long flags; |
d8d16e47 | 1348 | |
1da177e4 LT |
1349 | if (isicom_paranoia_check(port, tty->name, "isicom_set_termios")) |
1350 | return; | |
d8d16e47 | 1351 | |
1da177e4 | 1352 | if (tty->termios->c_cflag == old_termios->c_cflag && |
d8d16e47 | 1353 | tty->termios->c_iflag == old_termios->c_iflag) |
1da177e4 | 1354 | return; |
d8d16e47 | 1355 | |
cfe7c09a | 1356 | spin_lock_irqsave(&port->card->card_lock, flags); |
1da177e4 | 1357 | isicom_config_port(port); |
cfe7c09a | 1358 | spin_unlock_irqrestore(&port->card->card_lock, flags); |
d8d16e47 | 1359 | |
1da177e4 | 1360 | if ((old_termios->c_cflag & CRTSCTS) && |
d8d16e47 | 1361 | !(tty->termios->c_cflag & CRTSCTS)) { |
1da177e4 | 1362 | tty->hw_stopped = 0; |
d8d16e47 JS |
1363 | isicom_start(tty); |
1364 | } | |
1da177e4 LT |
1365 | } |
1366 | ||
1367 | /* throttle et all */ | |
d8d16e47 | 1368 | static void isicom_throttle(struct tty_struct *tty) |
1da177e4 | 1369 | { |
8070e35c | 1370 | struct isi_port *port = tty->driver_data; |
d8d16e47 JS |
1371 | struct isi_board *card = port->card; |
1372 | ||
1da177e4 LT |
1373 | if (isicom_paranoia_check(port, tty->name, "isicom_throttle")) |
1374 | return; | |
d8d16e47 | 1375 | |
1da177e4 LT |
1376 | /* tell the card that this port cannot handle any more data for now */ |
1377 | card->port_status &= ~(1 << port->channel); | |
1378 | outw(card->port_status, card->base + 0x02); | |
1379 | } | |
1380 | ||
1381 | /* unthrottle et all */ | |
d8d16e47 | 1382 | static void isicom_unthrottle(struct tty_struct *tty) |
1da177e4 | 1383 | { |
8070e35c | 1384 | struct isi_port *port = tty->driver_data; |
d8d16e47 JS |
1385 | struct isi_board *card = port->card; |
1386 | ||
1da177e4 LT |
1387 | if (isicom_paranoia_check(port, tty->name, "isicom_unthrottle")) |
1388 | return; | |
d8d16e47 | 1389 | |
1da177e4 LT |
1390 | /* tell the card that this port is ready to accept more data */ |
1391 | card->port_status |= (1 << port->channel); | |
1392 | outw(card->port_status, card->base + 0x02); | |
1393 | } | |
1394 | ||
1395 | /* stop et all */ | |
d8d16e47 | 1396 | static void isicom_stop(struct tty_struct *tty) |
1da177e4 | 1397 | { |
8070e35c | 1398 | struct isi_port *port = tty->driver_data; |
1da177e4 LT |
1399 | |
1400 | if (isicom_paranoia_check(port, tty->name, "isicom_stop")) | |
1401 | return; | |
d8d16e47 | 1402 | |
1da177e4 LT |
1403 | /* this tells the transmitter not to consider this port for |
1404 | data output to the card. */ | |
1405 | port->status &= ~ISI_TXOK; | |
1406 | } | |
1407 | ||
1408 | /* start et all */ | |
d8d16e47 | 1409 | static void isicom_start(struct tty_struct *tty) |
1da177e4 | 1410 | { |
8070e35c | 1411 | struct isi_port *port = tty->driver_data; |
d8d16e47 | 1412 | |
1da177e4 LT |
1413 | if (isicom_paranoia_check(port, tty->name, "isicom_start")) |
1414 | return; | |
d8d16e47 | 1415 | |
1da177e4 LT |
1416 | /* this tells the transmitter to consider this port for |
1417 | data output to the card. */ | |
1418 | port->status |= ISI_TXOK; | |
1419 | } | |
1420 | ||
d8d16e47 | 1421 | static void isicom_hangup(struct tty_struct *tty) |
1da177e4 | 1422 | { |
8070e35c | 1423 | struct isi_port *port = tty->driver_data; |
cfe7c09a | 1424 | unsigned long flags; |
d8d16e47 | 1425 | |
1da177e4 LT |
1426 | if (isicom_paranoia_check(port, tty->name, "isicom_hangup")) |
1427 | return; | |
d8d16e47 | 1428 | |
cfe7c09a | 1429 | spin_lock_irqsave(&port->card->card_lock, flags); |
1da177e4 | 1430 | isicom_shutdown_port(port); |
cfe7c09a JS |
1431 | spin_unlock_irqrestore(&port->card->card_lock, flags); |
1432 | ||
f1d03228 AC |
1433 | port->port.count = 0; |
1434 | port->port.flags &= ~ASYNC_NORMAL_ACTIVE; | |
1435 | port->port.tty = NULL; | |
1436 | wake_up_interruptible(&port->port.open_wait); | |
1da177e4 LT |
1437 | } |
1438 | ||
1da177e4 | 1439 | |
9ac0948b JS |
1440 | /* |
1441 | * Driver init and deinit functions | |
1442 | */ | |
1da177e4 | 1443 | |
b68e31d0 | 1444 | static const struct tty_operations isicom_ops = { |
d8d16e47 JS |
1445 | .open = isicom_open, |
1446 | .close = isicom_close, | |
1447 | .write = isicom_write, | |
1448 | .put_char = isicom_put_char, | |
1449 | .flush_chars = isicom_flush_chars, | |
1450 | .write_room = isicom_write_room, | |
1da177e4 | 1451 | .chars_in_buffer = isicom_chars_in_buffer, |
d8d16e47 JS |
1452 | .ioctl = isicom_ioctl, |
1453 | .set_termios = isicom_set_termios, | |
1454 | .throttle = isicom_throttle, | |
1455 | .unthrottle = isicom_unthrottle, | |
1456 | .stop = isicom_stop, | |
1457 | .start = isicom_start, | |
1458 | .hangup = isicom_hangup, | |
1459 | .flush_buffer = isicom_flush_buffer, | |
1460 | .tiocmget = isicom_tiocmget, | |
1461 | .tiocmset = isicom_tiocmset, | |
1da177e4 LT |
1462 | }; |
1463 | ||
9ac0948b JS |
1464 | static int __devinit reset_card(struct pci_dev *pdev, |
1465 | const unsigned int card, unsigned int *signature) | |
1da177e4 | 1466 | { |
9ac0948b JS |
1467 | struct isi_board *board = pci_get_drvdata(pdev); |
1468 | unsigned long base = board->base; | |
f0a0ba6d | 1469 | unsigned int sig, portcount = 0; |
9ac0948b | 1470 | int retval = 0; |
d8d16e47 | 1471 | |
9ac0948b JS |
1472 | dev_dbg(&pdev->dev, "ISILoad:Resetting Card%d at 0x%lx\n", card + 1, |
1473 | base); | |
d8d16e47 | 1474 | |
9ac0948b | 1475 | inw(base + 0x8); |
d8d16e47 | 1476 | |
f0a0ba6d | 1477 | msleep(10); |
9ac0948b JS |
1478 | |
1479 | outw(0, base + 0x8); /* Reset */ | |
1480 | ||
f0a0ba6d | 1481 | msleep(1000); |
9ac0948b | 1482 | |
f0a0ba6d JS |
1483 | sig = inw(base + 0x4) & 0xff; |
1484 | ||
1485 | if (sig != 0xa5 && sig != 0xbb && sig != 0xcc && sig != 0xdd && | |
1486 | sig != 0xee) { | |
1487 | dev_warn(&pdev->dev, "ISILoad:Card%u reset failure (Possible " | |
1488 | "bad I/O Port Address 0x%lx).\n", card + 1, base); | |
1489 | dev_dbg(&pdev->dev, "Sig=0x%x\n", sig); | |
1490 | retval = -EIO; | |
1491 | goto end; | |
1492 | } | |
1493 | ||
1494 | msleep(10); | |
9ac0948b | 1495 | |
18234f88 | 1496 | portcount = inw(base + 0x2); |
07fb6f26 | 1497 | if (!(inw(base + 0xe) & 0x1) || (portcount != 0 && portcount != 4 && |
f0a0ba6d | 1498 | portcount != 8 && portcount != 16)) { |
898eb71c | 1499 | dev_err(&pdev->dev, "ISILoad:PCI Card%d reset failure.\n", |
f0a0ba6d | 1500 | card + 1); |
18234f88 JS |
1501 | retval = -EIO; |
1502 | goto end; | |
9ac0948b JS |
1503 | } |
1504 | ||
f0a0ba6d | 1505 | switch (sig) { |
9ac0948b JS |
1506 | case 0xa5: |
1507 | case 0xbb: | |
1508 | case 0xdd: | |
18234f88 | 1509 | board->port_count = (portcount == 4) ? 4 : 8; |
9ac0948b JS |
1510 | board->shift_count = 12; |
1511 | break; | |
1512 | case 0xcc: | |
f0a0ba6d | 1513 | case 0xee: |
9ac0948b JS |
1514 | board->port_count = 16; |
1515 | board->shift_count = 11; | |
1516 | break; | |
d8d16e47 | 1517 | } |
9ac0948b | 1518 | dev_info(&pdev->dev, "-Done\n"); |
f0a0ba6d | 1519 | *signature = sig; |
d8d16e47 | 1520 | |
9ac0948b JS |
1521 | end: |
1522 | return retval; | |
1da177e4 LT |
1523 | } |
1524 | ||
e65c1db1 JS |
1525 | static int __devinit load_firmware(struct pci_dev *pdev, |
1526 | const unsigned int index, const unsigned int signature) | |
1527 | { | |
1528 | struct isi_board *board = pci_get_drvdata(pdev); | |
1529 | const struct firmware *fw; | |
1530 | unsigned long base = board->base; | |
1531 | unsigned int a; | |
1532 | u16 word_count, status; | |
1533 | int retval = -EIO; | |
1534 | char *name; | |
1535 | u8 *data; | |
1536 | ||
1537 | struct stframe { | |
1538 | u16 addr; | |
1539 | u16 count; | |
1540 | u8 data[0]; | |
1541 | } *frame; | |
1542 | ||
1543 | switch (signature) { | |
1544 | case 0xa5: | |
1545 | name = "isi608.bin"; | |
1546 | break; | |
1547 | case 0xbb: | |
1548 | name = "isi608em.bin"; | |
1549 | break; | |
1550 | case 0xcc: | |
1551 | name = "isi616em.bin"; | |
1552 | break; | |
1553 | case 0xdd: | |
1554 | name = "isi4608.bin"; | |
1555 | break; | |
1556 | case 0xee: | |
1557 | name = "isi4616.bin"; | |
1558 | break; | |
1559 | default: | |
1560 | dev_err(&pdev->dev, "Unknown signature.\n"); | |
1561 | goto end; | |
251b8dd7 | 1562 | } |
e65c1db1 JS |
1563 | |
1564 | retval = request_firmware(&fw, name, &pdev->dev); | |
1565 | if (retval) | |
1566 | goto end; | |
1567 | ||
e4e04088 JS |
1568 | retval = -EIO; |
1569 | ||
e65c1db1 JS |
1570 | for (frame = (struct stframe *)fw->data; |
1571 | frame < (struct stframe *)(fw->data + fw->size); | |
e4e04088 JS |
1572 | frame = (struct stframe *)((u8 *)(frame + 1) + |
1573 | frame->count)) { | |
e65c1db1 JS |
1574 | if (WaitTillCardIsFree(base)) |
1575 | goto errrelfw; | |
1576 | ||
1577 | outw(0xf0, base); /* start upload sequence */ | |
1578 | outw(0x00, base); | |
1579 | outw(frame->addr, base); /* lsb of address */ | |
1580 | ||
1581 | word_count = frame->count / 2 + frame->count % 2; | |
1582 | outw(word_count, base); | |
1583 | InterruptTheCard(base); | |
1584 | ||
1585 | udelay(100); /* 0x2f */ | |
1586 | ||
1587 | if (WaitTillCardIsFree(base)) | |
1588 | goto errrelfw; | |
1589 | ||
251b8dd7 AC |
1590 | status = inw(base + 0x4); |
1591 | if (status != 0) { | |
e65c1db1 | 1592 | dev_warn(&pdev->dev, "Card%d rejected load header:\n" |
898eb71c JP |
1593 | KERN_WARNING "Address:0x%x\n" |
1594 | KERN_WARNING "Count:0x%x\n" | |
1595 | KERN_WARNING "Status:0x%x\n", | |
e65c1db1 JS |
1596 | index + 1, frame->addr, frame->count, status); |
1597 | goto errrelfw; | |
1598 | } | |
1599 | outsw(base, frame->data, word_count); | |
1600 | ||
1601 | InterruptTheCard(base); | |
1602 | ||
1603 | udelay(50); /* 0x0f */ | |
1604 | ||
1605 | if (WaitTillCardIsFree(base)) | |
1606 | goto errrelfw; | |
1607 | ||
251b8dd7 AC |
1608 | status = inw(base + 0x4); |
1609 | if (status != 0) { | |
e65c1db1 JS |
1610 | dev_err(&pdev->dev, "Card%d got out of sync.Card " |
1611 | "Status:0x%x\n", index + 1, status); | |
1612 | goto errrelfw; | |
1613 | } | |
251b8dd7 | 1614 | } |
e65c1db1 | 1615 | |
e65c1db1 JS |
1616 | /* XXX: should we test it by reading it back and comparing with original like |
1617 | * in load firmware package? */ | |
e4e04088 JS |
1618 | for (frame = (struct stframe *)fw->data; |
1619 | frame < (struct stframe *)(fw->data + fw->size); | |
1620 | frame = (struct stframe *)((u8 *)(frame + 1) + | |
1621 | frame->count)) { | |
e65c1db1 JS |
1622 | if (WaitTillCardIsFree(base)) |
1623 | goto errrelfw; | |
1624 | ||
1625 | outw(0xf1, base); /* start download sequence */ | |
1626 | outw(0x00, base); | |
1627 | outw(frame->addr, base); /* lsb of address */ | |
1628 | ||
1629 | word_count = (frame->count >> 1) + frame->count % 2; | |
1630 | outw(word_count + 1, base); | |
1631 | InterruptTheCard(base); | |
1632 | ||
1633 | udelay(50); /* 0xf */ | |
1634 | ||
1635 | if (WaitTillCardIsFree(base)) | |
1636 | goto errrelfw; | |
1637 | ||
251b8dd7 AC |
1638 | status = inw(base + 0x4); |
1639 | if (status != 0) { | |
e65c1db1 | 1640 | dev_warn(&pdev->dev, "Card%d rejected verify header:\n" |
898eb71c JP |
1641 | KERN_WARNING "Address:0x%x\n" |
1642 | KERN_WARNING "Count:0x%x\n" | |
1643 | KERN_WARNING "Status: 0x%x\n", | |
e65c1db1 JS |
1644 | index + 1, frame->addr, frame->count, status); |
1645 | goto errrelfw; | |
1646 | } | |
1647 | ||
1648 | data = kmalloc(word_count * 2, GFP_KERNEL); | |
f0671378 JS |
1649 | if (data == NULL) { |
1650 | dev_err(&pdev->dev, "Card%d, firmware upload " | |
1651 | "failed, not enough memory\n", index + 1); | |
1652 | goto errrelfw; | |
1653 | } | |
e65c1db1 JS |
1654 | inw(base); |
1655 | insw(base, data, word_count); | |
1656 | InterruptTheCard(base); | |
1657 | ||
1658 | for (a = 0; a < frame->count; a++) | |
1659 | if (data[a] != frame->data[a]) { | |
1660 | kfree(data); | |
1661 | dev_err(&pdev->dev, "Card%d, firmware upload " | |
1662 | "failed\n", index + 1); | |
1663 | goto errrelfw; | |
1664 | } | |
1665 | kfree(data); | |
1666 | ||
1667 | udelay(50); /* 0xf */ | |
1668 | ||
1669 | if (WaitTillCardIsFree(base)) | |
1670 | goto errrelfw; | |
1671 | ||
251b8dd7 AC |
1672 | status = inw(base + 0x4); |
1673 | if (status != 0) { | |
e65c1db1 JS |
1674 | dev_err(&pdev->dev, "Card%d verify got out of sync. " |
1675 | "Card Status:0x%x\n", index + 1, status); | |
1676 | goto errrelfw; | |
1677 | } | |
1678 | } | |
1679 | ||
e4e04088 JS |
1680 | /* xfer ctrl */ |
1681 | if (WaitTillCardIsFree(base)) | |
1682 | goto errrelfw; | |
1683 | ||
1684 | outw(0xf2, base); | |
1685 | outw(0x800, base); | |
1686 | outw(0x0, base); | |
1687 | outw(0x0, base); | |
1688 | InterruptTheCard(base); | |
1689 | outw(0x0, base + 0x4); /* for ISI4608 cards */ | |
1690 | ||
e65c1db1 JS |
1691 | board->status |= FIRMWARE_LOADED; |
1692 | retval = 0; | |
1693 | ||
1694 | errrelfw: | |
1695 | release_firmware(fw); | |
1696 | end: | |
1697 | return retval; | |
1698 | } | |
1699 | ||
1da177e4 LT |
1700 | /* |
1701 | * Insmod can set static symbols so keep these static | |
1702 | */ | |
1ed0c0b7 | 1703 | static unsigned int card_count; |
9ac0948b JS |
1704 | |
1705 | static int __devinit isicom_probe(struct pci_dev *pdev, | |
1706 | const struct pci_device_id *ent) | |
1707 | { | |
4969b3a4 | 1708 | unsigned int signature, index; |
9ac0948b | 1709 | int retval = -EPERM; |
9ac0948b JS |
1710 | struct isi_board *board = NULL; |
1711 | ||
1ed0c0b7 | 1712 | if (card_count >= BOARD_COUNT) |
9ac0948b JS |
1713 | goto err; |
1714 | ||
e1e5770b JS |
1715 | retval = pci_enable_device(pdev); |
1716 | if (retval) { | |
1717 | dev_err(&pdev->dev, "failed to enable\n"); | |
1718 | goto err; | |
1719 | } | |
1720 | ||
9ac0948b JS |
1721 | dev_info(&pdev->dev, "ISI PCI Card(Device ID 0x%x)\n", ent->device); |
1722 | ||
1723 | /* allot the first empty slot in the array */ | |
1724 | for (index = 0; index < BOARD_COUNT; index++) | |
1725 | if (isi_card[index].base == 0) { | |
1726 | board = &isi_card[index]; | |
1727 | break; | |
1728 | } | |
1729 | ||
938a7023 | 1730 | board->index = index; |
4969b3a4 JS |
1731 | board->base = pci_resource_start(pdev, 3); |
1732 | board->irq = pdev->irq; | |
1ed0c0b7 | 1733 | card_count++; |
9ac0948b JS |
1734 | |
1735 | pci_set_drvdata(pdev, board); | |
1736 | ||
78028da9 JS |
1737 | retval = pci_request_region(pdev, 3, ISICOM_NAME); |
1738 | if (retval) { | |
09a4a112 JS |
1739 | dev_err(&pdev->dev, "I/O Region 0x%lx-0x%lx is busy. Card%d " |
1740 | "will be disabled.\n", board->base, board->base + 15, | |
1741 | index + 1); | |
1742 | retval = -EBUSY; | |
1ed0c0b7 | 1743 | goto errdec; |
251b8dd7 | 1744 | } |
9ac0948b | 1745 | |
09a4a112 JS |
1746 | retval = request_irq(board->irq, isicom_interrupt, |
1747 | IRQF_SHARED | IRQF_DISABLED, ISICOM_NAME, board); | |
1748 | if (retval < 0) { | |
1749 | dev_err(&pdev->dev, "Could not install handler at Irq %d. " | |
1750 | "Card%d will be disabled.\n", board->irq, index + 1); | |
9ac0948b | 1751 | goto errunrr; |
09a4a112 | 1752 | } |
9ac0948b JS |
1753 | |
1754 | retval = reset_card(pdev, index, &signature); | |
1755 | if (retval < 0) | |
1756 | goto errunri; | |
1757 | ||
e65c1db1 JS |
1758 | retval = load_firmware(pdev, index, signature); |
1759 | if (retval < 0) | |
1760 | goto errunri; | |
1761 | ||
938a7023 JS |
1762 | for (index = 0; index < board->port_count; index++) |
1763 | tty_register_device(isicom_normal, board->index * 16 + index, | |
1764 | &pdev->dev); | |
1765 | ||
9ac0948b JS |
1766 | return 0; |
1767 | ||
1768 | errunri: | |
1769 | free_irq(board->irq, board); | |
1770 | errunrr: | |
78028da9 | 1771 | pci_release_region(pdev, 3); |
1ed0c0b7 | 1772 | errdec: |
9ac0948b | 1773 | board->base = 0; |
1ed0c0b7 | 1774 | card_count--; |
e1e5770b | 1775 | pci_disable_device(pdev); |
1ed0c0b7 | 1776 | err: |
9ac0948b JS |
1777 | return retval; |
1778 | } | |
1779 | ||
1780 | static void __devexit isicom_remove(struct pci_dev *pdev) | |
1781 | { | |
1782 | struct isi_board *board = pci_get_drvdata(pdev); | |
938a7023 JS |
1783 | unsigned int i; |
1784 | ||
1785 | for (i = 0; i < board->port_count; i++) | |
1786 | tty_unregister_device(isicom_normal, board->index * 16 + i); | |
9ac0948b JS |
1787 | |
1788 | free_irq(board->irq, board); | |
78028da9 | 1789 | pci_release_region(pdev, 3); |
1ed0c0b7 JS |
1790 | board->base = 0; |
1791 | card_count--; | |
e1e5770b | 1792 | pci_disable_device(pdev); |
9ac0948b | 1793 | } |
1da177e4 | 1794 | |
ca262005 | 1795 | static int __init isicom_init(void) |
1da177e4 | 1796 | { |
9ac0948b JS |
1797 | int retval, idx, channel; |
1798 | struct isi_port *port; | |
d8d16e47 | 1799 | |
251b8dd7 | 1800 | for (idx = 0; idx < BOARD_COUNT; idx++) { |
9ac0948b JS |
1801 | port = &isi_ports[idx * 16]; |
1802 | isi_card[idx].ports = port; | |
1803 | spin_lock_init(&isi_card[idx].card_lock); | |
1804 | for (channel = 0; channel < 16; channel++, port++) { | |
44b7d1b3 | 1805 | tty_port_init(&port->port); |
9ac0948b JS |
1806 | port->magic = ISICOM_MAGIC; |
1807 | port->card = &isi_card[idx]; | |
1808 | port->channel = channel; | |
44b7d1b3 AC |
1809 | port->port.close_delay = 50 * HZ/100; |
1810 | port->port.closing_wait = 3000 * HZ/100; | |
9ac0948b | 1811 | port->status = 0; |
9ac0948b | 1812 | /* . . . */ |
251b8dd7 | 1813 | } |
9ac0948b JS |
1814 | isi_card[idx].base = 0; |
1815 | isi_card[idx].irq = 0; | |
1da177e4 | 1816 | } |
d8d16e47 | 1817 | |
09a4a112 JS |
1818 | /* tty driver structure initialization */ |
1819 | isicom_normal = alloc_tty_driver(PORT_COUNT); | |
1820 | if (!isicom_normal) { | |
1821 | retval = -ENOMEM; | |
9ac0948b | 1822 | goto error; |
09a4a112 JS |
1823 | } |
1824 | ||
1825 | isicom_normal->owner = THIS_MODULE; | |
1826 | isicom_normal->name = "ttyM"; | |
1827 | isicom_normal->major = ISICOM_NMAJOR; | |
1828 | isicom_normal->minor_start = 0; | |
1829 | isicom_normal->type = TTY_DRIVER_TYPE_SERIAL; | |
1830 | isicom_normal->subtype = SERIAL_TYPE_NORMAL; | |
1831 | isicom_normal->init_termios = tty_std_termios; | |
1832 | isicom_normal->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | | |
1833 | CLOCAL; | |
938a7023 JS |
1834 | isicom_normal->flags = TTY_DRIVER_REAL_RAW | |
1835 | TTY_DRIVER_DYNAMIC_DEV; | |
09a4a112 JS |
1836 | tty_set_operations(isicom_normal, &isicom_ops); |
1837 | ||
1838 | retval = tty_register_driver(isicom_normal); | |
1839 | if (retval) { | |
1840 | pr_dbg("Couldn't register the dialin driver\n"); | |
1841 | goto err_puttty; | |
1842 | } | |
1da177e4 | 1843 | |
9ac0948b | 1844 | retval = pci_register_driver(&isicom_driver); |
1da177e4 | 1845 | if (retval < 0) { |
9ac0948b | 1846 | printk(KERN_ERR "ISICOM: Unable to register pci driver.\n"); |
09a4a112 | 1847 | goto err_unrtty; |
1da177e4 | 1848 | } |
d8d16e47 | 1849 | |
34b55b86 | 1850 | mod_timer(&tx, jiffies + 1); |
d8d16e47 | 1851 | |
1da177e4 | 1852 | return 0; |
09a4a112 JS |
1853 | err_unrtty: |
1854 | tty_unregister_driver(isicom_normal); | |
1855 | err_puttty: | |
1856 | put_tty_driver(isicom_normal); | |
9ac0948b JS |
1857 | error: |
1858 | return retval; | |
1da177e4 LT |
1859 | } |
1860 | ||
1861 | static void __exit isicom_exit(void) | |
1862 | { | |
e327325f | 1863 | del_timer_sync(&tx); |
aaa246ea | 1864 | |
9ac0948b | 1865 | pci_unregister_driver(&isicom_driver); |
09a4a112 JS |
1866 | tty_unregister_driver(isicom_normal); |
1867 | put_tty_driver(isicom_normal); | |
1da177e4 LT |
1868 | } |
1869 | ||
ca262005 | 1870 | module_init(isicom_init); |
1da177e4 | 1871 | module_exit(isicom_exit); |
aaa246ea JS |
1872 | |
1873 | MODULE_AUTHOR("MultiTech"); | |
1874 | MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech"); | |
1875 | MODULE_LICENSE("GPL"); |