]>
Commit | Line | Data |
---|---|---|
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 | |
8eb04cf3 AC |
10 | * 1/9/98 alan@lxorguk.ukuu.org.uk |
11 | * Merge to 2.0.x kernel tree | |
1da177e4 LT |
12 | * Obtain and use official major/minors |
13 | * Loader switched to a misc device | |
14 | * (fixed range check bug as a side effect) | |
15 | * Printk clean up | |
8eb04cf3 AC |
16 | * 9/12/98 alan@lxorguk.ukuu.org.uk |
17 | * Rough port to 2.1.x | |
1da177e4 LT |
18 | * |
19 | * 10/6/99 sameer Merged the ISA and PCI drivers to | |
20 | * a new unified driver. | |
21 | * | |
22 | * 3/9/99 sameer Added support for ISI4616 cards. | |
23 | * | |
24 | * 16/9/99 sameer We do not force RTS low anymore. | |
d8d16e47 | 25 | * This is to prevent the firmware |
1da177e4 LT |
26 | * from getting confused. |
27 | * | |
28 | * 26/10/99 sameer Cosmetic changes:The driver now | |
29 | * dumps the Port Count information | |
30 | * along with I/O address and IRQ. | |
31 | * | |
32 | * 13/12/99 sameer Fixed the problem with IRQ sharing. | |
33 | * | |
34 | * 10/5/00 sameer Fixed isicom_shutdown_board() | |
35 | * to not lower DTR on all the ports | |
d8d16e47 | 36 | * when the last port on the card is |
1da177e4 LT |
37 | * closed. |
38 | * | |
39 | * 10/5/00 sameer Signal mask setup command added | |
d8d16e47 | 40 | * to isicom_setup_port and |
1da177e4 LT |
41 | * isicom_shutdown_port. |
42 | * | |
43 | * 24/5/00 sameer The driver is now SMP aware. | |
d8d16e47 JS |
44 | * |
45 | * | |
1da177e4 | 46 | * 27/11/00 Vinayak P Risbud Fixed the Driver Crash Problem |
d8d16e47 JS |
47 | * |
48 | * | |
1da177e4 LT |
49 | * 03/01/01 anil .s Added support for resetting the |
50 | * internal modems on ISI cards. | |
51 | * | |
52 | * 08/02/01 anil .s Upgraded the driver for kernel | |
53 | * 2.4.x | |
54 | * | |
d8d16e47 | 55 | * 11/04/01 Kevin Fixed firmware load problem with |
1da177e4 | 56 | * ISIHP-4X card |
d8d16e47 | 57 | * |
1da177e4 LT |
58 | * 30/04/01 anil .s Fixed the remote login through |
59 | * ISI port problem. Now the link | |
60 | * does not go down before password | |
61 | * prompt. | |
62 | * | |
63 | * 03/05/01 anil .s Fixed the problem with IRQ sharing | |
64 | * among ISI-PCI cards. | |
65 | * | |
66 | * 03/05/01 anil .s Added support to display the version | |
d8d16e47 | 67 | * info during insmod as well as module |
1da177e4 | 68 | * listing by lsmod. |
d8d16e47 | 69 | * |
1da177e4 LT |
70 | * 10/05/01 anil .s Done the modifications to the source |
71 | * file and Install script so that the | |
72 | * same installation can be used for | |
73 | * 2.2.x and 2.4.x kernel. | |
74 | * | |
75 | * 06/06/01 anil .s Now we drop both dtr and rts during | |
76 | * shutdown_port as well as raise them | |
77 | * during isicom_config_port. | |
d8d16e47 | 78 | * |
1da177e4 LT |
79 | * 09/06/01 acme@conectiva.com.br use capable, not suser, do |
80 | * restore_flags on failure in | |
81 | * isicom_send_break, verify put_user | |
82 | * result | |
83 | * | |
d8d16e47 JS |
84 | * 11/02/03 ranjeeth Added support for 230 Kbps and 460 Kbps |
85 | * Baud index extended to 21 | |
86 | * | |
87 | * 20/03/03 ranjeeth Made to work for Linux Advanced server. | |
88 | * Taken care of license warning. | |
89 | * | |
90 | * 10/12/03 Ravindra Made to work for Fedora Core 1 of | |
1da177e4 LT |
91 | * Red Hat Distribution |
92 | * | |
93 | * 06/01/05 Alan Cox Merged the ISI and base kernel strands | |
94 | * into a single 2.6 driver | |
95 | * | |
96 | * *********************************************************** | |
97 | * | |
d8d16e47 | 98 | * To use this driver you also need the support package. You |
1da177e4 LT |
99 | * can find this in RPM format on |
100 | * ftp://ftp.linux.org.uk/pub/linux/alan | |
d8d16e47 | 101 | * |
1da177e4 LT |
102 | * You can find the original tools for this direct from Multitech |
103 | * ftp://ftp.multitech.com/ISI-Cards/ | |
104 | * | |
105 | * Having installed the cards the module options (/etc/modprobe.conf) | |
106 | * | |
107 | * options isicom io=card1,card2,card3,card4 irq=card1,card2,card3,card4 | |
108 | * | |
109 | * Omit those entries for boards you don't have installed. | |
110 | * | |
111 | * TODO | |
1da177e4 LT |
112 | * Merge testing |
113 | * 64-bit verification | |
114 | */ | |
115 | ||
116 | #include <linux/module.h> | |
e65c1db1 | 117 | #include <linux/firmware.h> |
1da177e4 LT |
118 | #include <linux/kernel.h> |
119 | #include <linux/tty.h> | |
33f0f88f | 120 | #include <linux/tty_flip.h> |
1da177e4 LT |
121 | #include <linux/termios.h> |
122 | #include <linux/fs.h> | |
123 | #include <linux/sched.h> | |
124 | #include <linux/serial.h> | |
125 | #include <linux/mm.h> | |
1da177e4 LT |
126 | #include <linux/interrupt.h> |
127 | #include <linux/timer.h> | |
128 | #include <linux/delay.h> | |
129 | #include <linux/ioport.h> | |
130 | ||
251b8dd7 AC |
131 | #include <linux/uaccess.h> |
132 | #include <linux/io.h> | |
1da177e4 LT |
133 | #include <asm/system.h> |
134 | ||
135 | #include <linux/pci.h> | |
136 | ||
137 | #include <linux/isicom.h> | |
138 | ||
aaa246ea JS |
139 | #define InterruptTheCard(base) outw(0, (base) + 0xc) |
140 | #define ClearInterrupt(base) inw((base) + 0x0a) | |
141 | ||
73b52572 | 142 | #define pr_dbg(str...) pr_debug("ISICOM: " str) |
aaa246ea | 143 | #ifdef DEBUG |
aaa246ea JS |
144 | #define isicom_paranoia_check(a, b, c) __isicom_paranoia_check((a), (b), (c)) |
145 | #else | |
aaa246ea JS |
146 | #define isicom_paranoia_check(a, b, c) 0 |
147 | #endif | |
148 | ||
9ac0948b JS |
149 | static int isicom_probe(struct pci_dev *, const struct pci_device_id *); |
150 | static void __devexit isicom_remove(struct pci_dev *); | |
151 | ||
1da177e4 | 152 | static struct pci_device_id isicom_pci_tbl[] = { |
9ac0948b JS |
153 | { PCI_DEVICE(VENDOR_ID, 0x2028) }, |
154 | { PCI_DEVICE(VENDOR_ID, 0x2051) }, | |
155 | { PCI_DEVICE(VENDOR_ID, 0x2052) }, | |
156 | { PCI_DEVICE(VENDOR_ID, 0x2053) }, | |
157 | { PCI_DEVICE(VENDOR_ID, 0x2054) }, | |
158 | { PCI_DEVICE(VENDOR_ID, 0x2055) }, | |
159 | { PCI_DEVICE(VENDOR_ID, 0x2056) }, | |
160 | { PCI_DEVICE(VENDOR_ID, 0x2057) }, | |
161 | { PCI_DEVICE(VENDOR_ID, 0x2058) }, | |
1da177e4 LT |
162 | { 0 } |
163 | }; | |
164 | MODULE_DEVICE_TABLE(pci, isicom_pci_tbl); | |
165 | ||
9ac0948b JS |
166 | static struct pci_driver isicom_driver = { |
167 | .name = "isicom", | |
168 | .id_table = isicom_pci_tbl, | |
169 | .probe = isicom_probe, | |
170 | .remove = __devexit_p(isicom_remove) | |
171 | }; | |
172 | ||
1da177e4 LT |
173 | static int prev_card = 3; /* start servicing isi_card[0] */ |
174 | static struct tty_driver *isicom_normal; | |
175 | ||
1da177e4 | 176 | static void isicom_tx(unsigned long _data); |
d8d16e47 | 177 | static void isicom_start(struct tty_struct *tty); |
1da177e4 | 178 | |
34b55b86 JS |
179 | static DEFINE_TIMER(tx, isicom_tx, 0, 0); |
180 | ||
1da177e4 LT |
181 | /* baud index mappings from linux defns to isi */ |
182 | ||
183 | static signed char linuxb_to_isib[] = { | |
7edc136a | 184 | -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 16, 17, 18, 19, 20, 21 |
1da177e4 LT |
185 | }; |
186 | ||
187 | struct isi_board { | |
8070e35c | 188 | unsigned long base; |
4969b3a4 | 189 | int irq; |
1da177e4 LT |
190 | unsigned char port_count; |
191 | unsigned short status; | |
a547dfe9 | 192 | unsigned short port_status; /* each bit for each port */ |
1da177e4 | 193 | unsigned short shift_count; |
251b8dd7 | 194 | struct isi_port *ports; |
1da177e4 | 195 | signed char count; |
1da177e4 LT |
196 | spinlock_t card_lock; /* Card wide lock 11/5/00 -sameer */ |
197 | unsigned long flags; | |
938a7023 | 198 | unsigned int index; |
1da177e4 LT |
199 | }; |
200 | ||
201 | struct isi_port { | |
202 | unsigned short magic; | |
f1d03228 | 203 | struct tty_port port; |
8070e35c JS |
204 | u16 channel; |
205 | u16 status; | |
251b8dd7 | 206 | struct isi_board *card; |
251b8dd7 | 207 | unsigned char *xmit_buf; |
1da177e4 LT |
208 | int xmit_head; |
209 | int xmit_tail; | |
210 | int xmit_cnt; | |
211 | }; | |
212 | ||
213 | static struct isi_board isi_card[BOARD_COUNT]; | |
214 | static struct isi_port isi_ports[PORT_COUNT]; | |
215 | ||
216 | /* | |
217 | * Locking functions for card level locking. We need to own both | |
218 | * the kernel lock for the card and have the card in a position that | |
219 | * it wants to talk. | |
220 | */ | |
d8d16e47 | 221 | |
4969b3a4 | 222 | static inline int WaitTillCardIsFree(unsigned long base) |
cfe7c09a JS |
223 | { |
224 | unsigned int count = 0; | |
225 | unsigned int a = in_atomic(); /* do we run under spinlock? */ | |
226 | ||
227 | while (!(inw(base + 0xe) & 0x1) && count++ < 100) | |
228 | if (a) | |
229 | mdelay(1); | |
230 | else | |
231 | msleep(1); | |
232 | ||
233 | return !(inw(base + 0xe) & 0x1); | |
234 | } | |
235 | ||
1da177e4 LT |
236 | static int lock_card(struct isi_board *card) |
237 | { | |
8070e35c | 238 | unsigned long base = card->base; |
5b21f9dd | 239 | unsigned int retries, a; |
1da177e4 | 240 | |
5b21f9dd | 241 | for (retries = 0; retries < 10; retries++) { |
1da177e4 | 242 | spin_lock_irqsave(&card->card_lock, card->flags); |
5b21f9dd JS |
243 | for (a = 0; a < 10; a++) { |
244 | if (inw(base + 0xe) & 0x1) | |
245 | return 1; | |
246 | udelay(10); | |
1da177e4 | 247 | } |
5b21f9dd JS |
248 | spin_unlock_irqrestore(&card->card_lock, card->flags); |
249 | msleep(10); | |
1da177e4 | 250 | } |
a547dfe9 JS |
251 | printk(KERN_WARNING "ISICOM: Failed to lock Card (0x%lx)\n", |
252 | card->base); | |
253 | ||
0418726b | 254 | return 0; /* Failed to acquire the card! */ |
1da177e4 LT |
255 | } |
256 | ||
1da177e4 LT |
257 | static void unlock_card(struct isi_board *card) |
258 | { | |
259 | spin_unlock_irqrestore(&card->card_lock, card->flags); | |
260 | } | |
261 | ||
262 | /* | |
263 | * ISI Card specific ops ... | |
264 | */ | |
d8d16e47 | 265 | |
cfe7c09a | 266 | /* card->lock HAS to be held */ |
d8d16e47 | 267 | static void raise_dtr(struct isi_port *port) |
1da177e4 | 268 | { |
d8d16e47 | 269 | struct isi_board *card = port->card; |
8070e35c JS |
270 | unsigned long base = card->base; |
271 | u16 channel = port->channel; | |
1da177e4 | 272 | |
cfe7c09a | 273 | if (WaitTillCardIsFree(base)) |
1da177e4 LT |
274 | return; |
275 | ||
d8d16e47 | 276 | outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
1da177e4 LT |
277 | outw(0x0504, base); |
278 | InterruptTheCard(base); | |
279 | port->status |= ISI_DTR; | |
1da177e4 LT |
280 | } |
281 | ||
cfe7c09a | 282 | /* card->lock HAS to be held */ |
d8d16e47 JS |
283 | static inline void drop_dtr(struct isi_port *port) |
284 | { | |
285 | struct isi_board *card = port->card; | |
8070e35c JS |
286 | unsigned long base = card->base; |
287 | u16 channel = port->channel; | |
1da177e4 | 288 | |
cfe7c09a | 289 | if (WaitTillCardIsFree(base)) |
1da177e4 LT |
290 | return; |
291 | ||
d8d16e47 | 292 | outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
1da177e4 | 293 | outw(0x0404, base); |
d8d16e47 | 294 | InterruptTheCard(base); |
1da177e4 | 295 | port->status &= ~ISI_DTR; |
1da177e4 LT |
296 | } |
297 | ||
cfe7c09a | 298 | /* card->lock HAS to be held */ |
d8d16e47 | 299 | static inline void raise_rts(struct isi_port *port) |
1da177e4 | 300 | { |
d8d16e47 | 301 | struct isi_board *card = port->card; |
8070e35c JS |
302 | unsigned long base = card->base; |
303 | u16 channel = port->channel; | |
1da177e4 | 304 | |
cfe7c09a | 305 | if (WaitTillCardIsFree(base)) |
1da177e4 LT |
306 | return; |
307 | ||
d8d16e47 | 308 | outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
1da177e4 | 309 | outw(0x0a04, base); |
d8d16e47 | 310 | InterruptTheCard(base); |
1da177e4 | 311 | port->status |= ISI_RTS; |
1da177e4 | 312 | } |
cfe7c09a JS |
313 | |
314 | /* card->lock HAS to be held */ | |
d8d16e47 | 315 | static inline void drop_rts(struct isi_port *port) |
1da177e4 | 316 | { |
d8d16e47 | 317 | struct isi_board *card = port->card; |
8070e35c JS |
318 | unsigned long base = card->base; |
319 | u16 channel = port->channel; | |
1da177e4 | 320 | |
cfe7c09a | 321 | if (WaitTillCardIsFree(base)) |
1da177e4 LT |
322 | return; |
323 | ||
d8d16e47 | 324 | outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
1da177e4 | 325 | outw(0x0804, base); |
d8d16e47 | 326 | InterruptTheCard(base); |
1da177e4 | 327 | port->status &= ~ISI_RTS; |
1da177e4 LT |
328 | } |
329 | ||
cfe7c09a | 330 | /* card->lock MUST NOT be held */ |
5d951fb4 AC |
331 | |
332 | static void isicom_raise_dtr_rts(struct tty_port *port) | |
1da177e4 | 333 | { |
5d951fb4 AC |
334 | struct isi_port *ip = container_of(port, struct isi_port, port); |
335 | struct isi_board *card = ip->card; | |
8070e35c | 336 | unsigned long base = card->base; |
5d951fb4 | 337 | u16 channel = ip->channel; |
1da177e4 LT |
338 | |
339 | if (!lock_card(card)) | |
340 | return; | |
341 | ||
d8d16e47 | 342 | outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
1da177e4 LT |
343 | outw(0x0f04, base); |
344 | InterruptTheCard(base); | |
5d951fb4 | 345 | ip->status |= (ISI_DTR | ISI_RTS); |
1da177e4 LT |
346 | unlock_card(card); |
347 | } | |
348 | ||
cfe7c09a | 349 | /* card->lock HAS to be held */ |
d8d16e47 | 350 | static void drop_dtr_rts(struct isi_port *port) |
1da177e4 | 351 | { |
d8d16e47 | 352 | struct isi_board *card = port->card; |
8070e35c JS |
353 | unsigned long base = card->base; |
354 | u16 channel = port->channel; | |
1da177e4 | 355 | |
cfe7c09a | 356 | if (WaitTillCardIsFree(base)) |
1da177e4 LT |
357 | return; |
358 | ||
d8d16e47 | 359 | outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
1da177e4 | 360 | outw(0x0c04, base); |
d8d16e47 | 361 | InterruptTheCard(base); |
1da177e4 | 362 | port->status &= ~(ISI_RTS | ISI_DTR); |
1da177e4 LT |
363 | } |
364 | ||
1da177e4 LT |
365 | /* |
366 | * ISICOM Driver specific routines ... | |
367 | * | |
368 | */ | |
d8d16e47 | 369 | |
aaa246ea JS |
370 | static inline int __isicom_paranoia_check(struct isi_port const *port, |
371 | char *name, const char *routine) | |
1da177e4 | 372 | { |
1da177e4 | 373 | if (!port) { |
aaa246ea JS |
374 | printk(KERN_WARNING "ISICOM: Warning: bad isicom magic for " |
375 | "dev %s in %s.\n", name, routine); | |
1da177e4 LT |
376 | return 1; |
377 | } | |
378 | if (port->magic != ISICOM_MAGIC) { | |
aaa246ea JS |
379 | printk(KERN_WARNING "ISICOM: Warning: NULL isicom port for " |
380 | "dev %s in %s.\n", name, routine); | |
1da177e4 | 381 | return 1; |
d8d16e47 | 382 | } |
aaa246ea | 383 | |
1da177e4 LT |
384 | return 0; |
385 | } | |
d8d16e47 | 386 | |
1da177e4 | 387 | /* |
d8d16e47 | 388 | * Transmitter. |
1da177e4 LT |
389 | * |
390 | * We shovel data into the card buffers on a regular basis. The card | |
391 | * will do the rest of the work for us. | |
392 | */ | |
393 | ||
394 | static void isicom_tx(unsigned long _data) | |
395 | { | |
4969b3a4 | 396 | unsigned long flags, base; |
5b21f9dd | 397 | unsigned int retries; |
4969b3a4 | 398 | short count = (BOARD_COUNT-1), card; |
1da177e4 | 399 | short txcount, wrd, residue, word_count, cnt; |
d8d16e47 JS |
400 | struct isi_port *port; |
401 | struct tty_struct *tty; | |
402 | ||
1da177e4 LT |
403 | /* find next active board */ |
404 | card = (prev_card + 1) & 0x0003; | |
251b8dd7 | 405 | while (count-- > 0) { |
d8d16e47 | 406 | if (isi_card[card].status & BOARD_ACTIVE) |
1da177e4 | 407 | break; |
d8d16e47 | 408 | card = (card + 1) & 0x0003; |
1da177e4 LT |
409 | } |
410 | if (!(isi_card[card].status & BOARD_ACTIVE)) | |
411 | goto sched_again; | |
d8d16e47 | 412 | |
1da177e4 | 413 | prev_card = card; |
d8d16e47 | 414 | |
1da177e4 LT |
415 | count = isi_card[card].port_count; |
416 | port = isi_card[card].ports; | |
417 | base = isi_card[card].base; | |
5b21f9dd JS |
418 | |
419 | spin_lock_irqsave(&isi_card[card].card_lock, flags); | |
420 | for (retries = 0; retries < 100; retries++) { | |
421 | if (inw(base + 0xe) & 0x1) | |
422 | break; | |
423 | udelay(2); | |
424 | } | |
425 | if (retries >= 100) | |
426 | goto unlock; | |
427 | ||
d450b5a0 AC |
428 | tty = tty_port_tty_get(&port->port); |
429 | if (tty == NULL) | |
430 | goto put_unlock; | |
431 | ||
251b8dd7 | 432 | for (; count > 0; count--, port++) { |
1da177e4 | 433 | /* port not active or tx disabled to force flow control */ |
f1d03228 | 434 | if (!(port->port.flags & ASYNC_INITIALIZED) || |
d8d16e47 | 435 | !(port->status & ISI_TXOK)) |
1da177e4 | 436 | continue; |
d8d16e47 | 437 | |
1da177e4 | 438 | txcount = min_t(short, TX_SIZE, port->xmit_cnt); |
5b21f9dd | 439 | if (txcount <= 0 || tty->stopped || tty->hw_stopped) |
1da177e4 | 440 | continue; |
5b21f9dd JS |
441 | |
442 | if (!(inw(base + 0x02) & (1 << port->channel))) | |
d8d16e47 | 443 | continue; |
5b21f9dd | 444 | |
aaa246ea JS |
445 | pr_dbg("txing %d bytes, port%d.\n", txcount, |
446 | port->channel + 1); | |
447 | outw((port->channel << isi_card[card].shift_count) | txcount, | |
448 | base); | |
1da177e4 | 449 | residue = NO; |
d8d16e47 | 450 | wrd = 0; |
1da177e4 | 451 | while (1) { |
a547dfe9 JS |
452 | cnt = min_t(int, txcount, (SERIAL_XMIT_SIZE |
453 | - port->xmit_tail)); | |
1da177e4 LT |
454 | if (residue == YES) { |
455 | residue = NO; | |
456 | if (cnt > 0) { | |
f1d03228 | 457 | wrd |= (port->port.xmit_buf[port->xmit_tail] |
a547dfe9 JS |
458 | << 8); |
459 | port->xmit_tail = (port->xmit_tail + 1) | |
460 | & (SERIAL_XMIT_SIZE - 1); | |
1da177e4 LT |
461 | port->xmit_cnt--; |
462 | txcount--; | |
463 | cnt--; | |
d8d16e47 | 464 | outw(wrd, base); |
a547dfe9 | 465 | } else { |
1da177e4 LT |
466 | outw(wrd, base); |
467 | break; | |
468 | } | |
d8d16e47 | 469 | } |
251b8dd7 AC |
470 | if (cnt <= 0) |
471 | break; | |
1da177e4 | 472 | word_count = cnt >> 1; |
f1d03228 | 473 | outsw(base, port->port.xmit_buf+port->xmit_tail, word_count); |
a547dfe9 JS |
474 | port->xmit_tail = (port->xmit_tail |
475 | + (word_count << 1)) & (SERIAL_XMIT_SIZE - 1); | |
1da177e4 LT |
476 | txcount -= (word_count << 1); |
477 | port->xmit_cnt -= (word_count << 1); | |
478 | if (cnt & 0x0001) { | |
479 | residue = YES; | |
f1d03228 | 480 | wrd = port->port.xmit_buf[port->xmit_tail]; |
a547dfe9 JS |
481 | port->xmit_tail = (port->xmit_tail + 1) |
482 | & (SERIAL_XMIT_SIZE - 1); | |
1da177e4 LT |
483 | port->xmit_cnt--; |
484 | txcount--; | |
485 | } | |
486 | } | |
487 | ||
488 | InterruptTheCard(base); | |
489 | if (port->xmit_cnt <= 0) | |
490 | port->status &= ~ISI_TXOK; | |
491 | if (port->xmit_cnt <= WAKEUP_CHARS) | |
0aa5de85 | 492 | tty_wakeup(tty); |
d8d16e47 | 493 | } |
1da177e4 | 494 | |
d450b5a0 AC |
495 | put_unlock: |
496 | tty_kref_put(tty); | |
5b21f9dd JS |
497 | unlock: |
498 | spin_unlock_irqrestore(&isi_card[card].card_lock, flags); | |
d8d16e47 JS |
499 | /* schedule another tx for hopefully in about 10ms */ |
500 | sched_again: | |
34b55b86 | 501 | mod_timer(&tx, jiffies + msecs_to_jiffies(10)); |
d8d16e47 JS |
502 | } |
503 | ||
1da177e4 | 504 | /* |
d8d16e47 | 505 | * Main interrupt handler routine |
1da177e4 | 506 | */ |
d8d16e47 | 507 | |
7d12e780 | 508 | static irqreturn_t isicom_interrupt(int irq, void *dev_id) |
1da177e4 | 509 | { |
8070e35c | 510 | struct isi_board *card = dev_id; |
d8d16e47 JS |
511 | struct isi_port *port; |
512 | struct tty_struct *tty; | |
8070e35c JS |
513 | unsigned long base; |
514 | u16 header, word_count, count, channel; | |
1da177e4 | 515 | short byte_count; |
33f0f88f | 516 | unsigned char *rp; |
d8d16e47 | 517 | |
1da177e4 LT |
518 | if (!card || !(card->status & FIRMWARE_LOADED)) |
519 | return IRQ_NONE; | |
d8d16e47 | 520 | |
1da177e4 | 521 | base = card->base; |
cb4a10cc JS |
522 | |
523 | /* did the card interrupt us? */ | |
524 | if (!(inw(base + 0x0e) & 0x02)) | |
525 | return IRQ_NONE; | |
526 | ||
1da177e4 | 527 | spin_lock(&card->card_lock); |
d8d16e47 | 528 | |
18234f88 JS |
529 | /* |
530 | * disable any interrupts from the PCI card and lower the | |
531 | * interrupt line | |
532 | */ | |
533 | outw(0x8000, base+0x04); | |
534 | ClearInterrupt(base); | |
d8d16e47 | 535 | |
1da177e4 LT |
536 | inw(base); /* get the dummy word out */ |
537 | header = inw(base); | |
538 | channel = (header & 0x7800) >> card->shift_count; | |
539 | byte_count = header & 0xff; | |
540 | ||
541 | if (channel + 1 > card->port_count) { | |
a547dfe9 JS |
542 | printk(KERN_WARNING "ISICOM: isicom_interrupt(0x%lx): " |
543 | "%d(channel) > port_count.\n", base, channel+1); | |
18234f88 | 544 | outw(0x0000, base+0x04); /* enable interrupts */ |
1da177e4 | 545 | spin_unlock(&card->card_lock); |
d8d16e47 | 546 | return IRQ_HANDLED; |
1da177e4 LT |
547 | } |
548 | port = card->ports + channel; | |
f1d03228 | 549 | if (!(port->port.flags & ASYNC_INITIALIZED)) { |
18234f88 | 550 | outw(0x0000, base+0x04); /* enable interrupts */ |
174f1307 | 551 | spin_unlock(&card->card_lock); |
1da177e4 | 552 | return IRQ_HANDLED; |
d8d16e47 JS |
553 | } |
554 | ||
d450b5a0 | 555 | tty = tty_port_tty_get(&port->port); |
1da177e4 LT |
556 | if (tty == NULL) { |
557 | word_count = byte_count >> 1; | |
251b8dd7 | 558 | while (byte_count > 1) { |
1da177e4 LT |
559 | inw(base); |
560 | byte_count -= 2; | |
561 | } | |
562 | if (byte_count & 0x01) | |
563 | inw(base); | |
18234f88 | 564 | outw(0x0000, base+0x04); /* enable interrupts */ |
1da177e4 LT |
565 | spin_unlock(&card->card_lock); |
566 | return IRQ_HANDLED; | |
567 | } | |
d8d16e47 | 568 | |
1da177e4 LT |
569 | if (header & 0x8000) { /* Status Packet */ |
570 | header = inw(base); | |
251b8dd7 | 571 | switch (header & 0xff) { |
d8d16e47 | 572 | case 0: /* Change in EIA signals */ |
f1d03228 | 573 | if (port->port.flags & ASYNC_CHECK_CD) { |
d8d16e47 JS |
574 | if (port->status & ISI_DCD) { |
575 | if (!(header & ISI_DCD)) { | |
576 | /* Carrier has been lost */ | |
a547dfe9 JS |
577 | pr_dbg("interrupt: DCD->low.\n" |
578 | ); | |
d8d16e47 | 579 | port->status &= ~ISI_DCD; |
0aa5de85 | 580 | tty_hangup(tty); |
1da177e4 | 581 | } |
a547dfe9 JS |
582 | } else if (header & ISI_DCD) { |
583 | /* Carrier has been detected */ | |
584 | pr_dbg("interrupt: DCD->high.\n"); | |
585 | port->status |= ISI_DCD; | |
f1d03228 | 586 | wake_up_interruptible(&port->port.open_wait); |
1da177e4 | 587 | } |
a547dfe9 | 588 | } else { |
d8d16e47 JS |
589 | if (header & ISI_DCD) |
590 | port->status |= ISI_DCD; | |
591 | else | |
592 | port->status &= ~ISI_DCD; | |
593 | } | |
594 | ||
f1d03228 | 595 | if (port->port.flags & ASYNC_CTS_FLOW) { |
d450b5a0 | 596 | if (tty->hw_stopped) { |
d8d16e47 | 597 | if (header & ISI_CTS) { |
f1d03228 | 598 | port->port.tty->hw_stopped = 0; |
d8d16e47 | 599 | /* start tx ing */ |
a547dfe9 JS |
600 | port->status |= (ISI_TXOK |
601 | | ISI_CTS); | |
0aa5de85 | 602 | tty_wakeup(tty); |
1da177e4 | 603 | } |
a547dfe9 | 604 | } else if (!(header & ISI_CTS)) { |
d450b5a0 | 605 | tty->hw_stopped = 1; |
a547dfe9 JS |
606 | /* stop tx ing */ |
607 | port->status &= ~(ISI_TXOK | ISI_CTS); | |
1da177e4 | 608 | } |
a547dfe9 | 609 | } else { |
d8d16e47 JS |
610 | if (header & ISI_CTS) |
611 | port->status |= ISI_CTS; | |
1da177e4 | 612 | else |
d8d16e47 JS |
613 | port->status &= ~ISI_CTS; |
614 | } | |
615 | ||
616 | if (header & ISI_DSR) | |
617 | port->status |= ISI_DSR; | |
618 | else | |
619 | port->status &= ~ISI_DSR; | |
620 | ||
621 | if (header & ISI_RI) | |
622 | port->status |= ISI_RI; | |
623 | else | |
624 | port->status &= ~ISI_RI; | |
625 | ||
626 | break; | |
627 | ||
a547dfe9 | 628 | case 1: /* Received Break !!! */ |
d8d16e47 | 629 | tty_insert_flip_char(tty, 0, TTY_BREAK); |
f1d03228 | 630 | if (port->port.flags & ASYNC_SAK) |
d8d16e47 JS |
631 | do_SAK(tty); |
632 | tty_flip_buffer_push(tty); | |
633 | break; | |
634 | ||
635 | case 2: /* Statistics */ | |
aaa246ea | 636 | pr_dbg("isicom_interrupt: stats!!!.\n"); |
d8d16e47 JS |
637 | break; |
638 | ||
639 | default: | |
aaa246ea | 640 | pr_dbg("Intr: Unknown code in status packet.\n"); |
d8d16e47 JS |
641 | break; |
642 | } | |
a547dfe9 | 643 | } else { /* Data Packet */ |
33f0f88f AC |
644 | |
645 | count = tty_prepare_flip_string(tty, &rp, byte_count & ~1); | |
aaa246ea | 646 | pr_dbg("Intr: Can rx %d of %d bytes.\n", count, byte_count); |
1da177e4 | 647 | word_count = count >> 1; |
33f0f88f | 648 | insw(base, rp, word_count); |
1da177e4 LT |
649 | byte_count -= (word_count << 1); |
650 | if (count & 0x0001) { | |
a547dfe9 JS |
651 | tty_insert_flip_char(tty, inw(base) & 0xff, |
652 | TTY_NORMAL); | |
1da177e4 | 653 | byte_count -= 2; |
d8d16e47 | 654 | } |
1da177e4 | 655 | if (byte_count > 0) { |
aaa246ea JS |
656 | pr_dbg("Intr(0x%lx:%d): Flip buffer overflow! dropping " |
657 | "bytes...\n", base, channel + 1); | |
251b8dd7 AC |
658 | /* drain out unread xtra data */ |
659 | while (byte_count > 0) { | |
1da177e4 LT |
660 | inw(base); |
661 | byte_count -= 2; | |
662 | } | |
663 | } | |
33f0f88f | 664 | tty_flip_buffer_push(tty); |
1da177e4 | 665 | } |
18234f88 | 666 | outw(0x0000, base+0x04); /* enable interrupts */ |
174f1307 | 667 | spin_unlock(&card->card_lock); |
d450b5a0 | 668 | tty_kref_put(tty); |
a547dfe9 | 669 | |
1da177e4 | 670 | return IRQ_HANDLED; |
d8d16e47 | 671 | } |
1da177e4 | 672 | |
d450b5a0 | 673 | static void isicom_config_port(struct tty_struct *tty) |
1da177e4 | 674 | { |
d450b5a0 | 675 | struct isi_port *port = tty->driver_data; |
d8d16e47 | 676 | struct isi_board *card = port->card; |
1da177e4 | 677 | unsigned long baud; |
8070e35c JS |
678 | unsigned long base = card->base; |
679 | u16 channel_setup, channel = port->channel, | |
680 | shift_count = card->shift_count; | |
1da177e4 | 681 | unsigned char flow_ctrl; |
d8d16e47 | 682 | |
251b8dd7 | 683 | /* FIXME: Switch to new tty baud API */ |
1da177e4 LT |
684 | baud = C_BAUD(tty); |
685 | if (baud & CBAUDEX) { | |
686 | baud &= ~CBAUDEX; | |
d8d16e47 | 687 | |
1da177e4 LT |
688 | /* if CBAUDEX bit is on and the baud is set to either 50 or 75 |
689 | * then the card is programmed for 57.6Kbps or 115Kbps | |
690 | * respectively. | |
d8d16e47 JS |
691 | */ |
692 | ||
7edc136a JS |
693 | /* 1,2,3,4 => 57.6, 115.2, 230, 460 kbps resp. */ |
694 | if (baud < 1 || baud > 4) | |
d450b5a0 | 695 | tty->termios->c_cflag &= ~CBAUDEX; |
1da177e4 LT |
696 | else |
697 | baud += 15; | |
d8d16e47 | 698 | } |
1da177e4 | 699 | if (baud == 15) { |
d8d16e47 JS |
700 | |
701 | /* the ASYNC_SPD_HI and ASYNC_SPD_VHI options are set | |
1da177e4 LT |
702 | * by the set_serial_info ioctl ... this is done by |
703 | * the 'setserial' utility. | |
d8d16e47 JS |
704 | */ |
705 | ||
f1d03228 | 706 | if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) |
d8d16e47 | 707 | baud++; /* 57.6 Kbps */ |
f1d03228 | 708 | if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) |
251b8dd7 | 709 | baud += 2; /* 115 Kbps */ |
f1d03228 | 710 | if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) |
7edc136a | 711 | baud += 3; /* 230 kbps*/ |
f1d03228 | 712 | if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) |
7edc136a | 713 | baud += 4; /* 460 kbps*/ |
1da177e4 LT |
714 | } |
715 | if (linuxb_to_isib[baud] == -1) { | |
716 | /* hang up */ | |
d8d16e47 JS |
717 | drop_dtr(port); |
718 | return; | |
251b8dd7 | 719 | } else |
1da177e4 | 720 | raise_dtr(port); |
d8d16e47 | 721 | |
cfe7c09a | 722 | if (WaitTillCardIsFree(base) == 0) { |
251b8dd7 | 723 | outw(0x8000 | (channel << shift_count) | 0x03, base); |
1da177e4 LT |
724 | outw(linuxb_to_isib[baud] << 8 | 0x03, base); |
725 | channel_setup = 0; | |
251b8dd7 | 726 | switch (C_CSIZE(tty)) { |
d8d16e47 JS |
727 | case CS5: |
728 | channel_setup |= ISICOM_CS5; | |
729 | break; | |
730 | case CS6: | |
731 | channel_setup |= ISICOM_CS6; | |
732 | break; | |
733 | case CS7: | |
734 | channel_setup |= ISICOM_CS7; | |
735 | break; | |
736 | case CS8: | |
737 | channel_setup |= ISICOM_CS8; | |
738 | break; | |
1da177e4 | 739 | } |
d8d16e47 | 740 | |
1da177e4 LT |
741 | if (C_CSTOPB(tty)) |
742 | channel_setup |= ISICOM_2SB; | |
743 | if (C_PARENB(tty)) { | |
744 | channel_setup |= ISICOM_EVPAR; | |
745 | if (C_PARODD(tty)) | |
d8d16e47 | 746 | channel_setup |= ISICOM_ODPAR; |
1da177e4 | 747 | } |
d8d16e47 | 748 | outw(channel_setup, base); |
1da177e4 | 749 | InterruptTheCard(base); |
d8d16e47 | 750 | } |
1da177e4 | 751 | if (C_CLOCAL(tty)) |
f1d03228 | 752 | port->port.flags &= ~ASYNC_CHECK_CD; |
1da177e4 | 753 | else |
f1d03228 | 754 | port->port.flags |= ASYNC_CHECK_CD; |
d8d16e47 | 755 | |
1da177e4 LT |
756 | /* flow control settings ...*/ |
757 | flow_ctrl = 0; | |
f1d03228 | 758 | port->port.flags &= ~ASYNC_CTS_FLOW; |
1da177e4 | 759 | if (C_CRTSCTS(tty)) { |
f1d03228 | 760 | port->port.flags |= ASYNC_CTS_FLOW; |
1da177e4 | 761 | flow_ctrl |= ISICOM_CTSRTS; |
d8d16e47 JS |
762 | } |
763 | if (I_IXON(tty)) | |
1da177e4 LT |
764 | flow_ctrl |= ISICOM_RESPOND_XONXOFF; |
765 | if (I_IXOFF(tty)) | |
d8d16e47 JS |
766 | flow_ctrl |= ISICOM_INITIATE_XONXOFF; |
767 | ||
cfe7c09a | 768 | if (WaitTillCardIsFree(base) == 0) { |
251b8dd7 | 769 | outw(0x8000 | (channel << shift_count) | 0x04, base); |
1da177e4 LT |
770 | outw(flow_ctrl << 8 | 0x05, base); |
771 | outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base); | |
772 | InterruptTheCard(base); | |
1da177e4 | 773 | } |
d8d16e47 | 774 | |
1da177e4 LT |
775 | /* rx enabled -> enable port for rx on the card */ |
776 | if (C_CREAD(tty)) { | |
777 | card->port_status |= (1 << channel); | |
778 | outw(card->port_status, base + 0x02); | |
779 | } | |
780 | } | |
1da177e4 | 781 | |
d8d16e47 JS |
782 | /* open et all */ |
783 | ||
784 | static inline void isicom_setup_board(struct isi_board *bp) | |
1da177e4 LT |
785 | { |
786 | int channel; | |
d8d16e47 | 787 | struct isi_port *port; |
1da177e4 | 788 | unsigned long flags; |
d8d16e47 | 789 | |
1da177e4 LT |
790 | spin_lock_irqsave(&bp->card_lock, flags); |
791 | if (bp->status & BOARD_ACTIVE) { | |
792 | spin_unlock_irqrestore(&bp->card_lock, flags); | |
793 | return; | |
794 | } | |
795 | port = bp->ports; | |
796 | bp->status |= BOARD_ACTIVE; | |
d8d16e47 | 797 | for (channel = 0; channel < bp->port_count; channel++, port++) |
1da177e4 | 798 | drop_dtr_rts(port); |
cfe7c09a | 799 | spin_unlock_irqrestore(&bp->card_lock, flags); |
1da177e4 | 800 | } |
d8d16e47 | 801 | |
d450b5a0 | 802 | static int isicom_setup_port(struct tty_struct *tty) |
1da177e4 | 803 | { |
d450b5a0 | 804 | struct isi_port *port = tty->driver_data; |
d8d16e47 | 805 | struct isi_board *card = port->card; |
1da177e4 | 806 | unsigned long flags; |
d8d16e47 | 807 | |
f1d03228 | 808 | if (port->port.flags & ASYNC_INITIALIZED) |
1da177e4 | 809 | return 0; |
f1d03228 AC |
810 | if (tty_port_alloc_xmit_buf(&port->port) < 0) |
811 | return -ENOMEM; | |
1da177e4 LT |
812 | |
813 | spin_lock_irqsave(&card->card_lock, flags); | |
d450b5a0 | 814 | clear_bit(TTY_IO_ERROR, &tty->flags); |
f1d03228 | 815 | if (port->port.count == 1) |
1da177e4 | 816 | card->count++; |
d8d16e47 | 817 | |
1da177e4 | 818 | port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; |
d8d16e47 | 819 | |
1da177e4 | 820 | /* discard any residual data */ |
cfe7c09a JS |
821 | if (WaitTillCardIsFree(card->base) == 0) { |
822 | outw(0x8000 | (port->channel << card->shift_count) | 0x02, | |
823 | card->base); | |
824 | outw(((ISICOM_KILLTX | ISICOM_KILLRX) << 8) | 0x06, card->base); | |
825 | InterruptTheCard(card->base); | |
826 | } | |
d8d16e47 | 827 | |
d450b5a0 | 828 | isicom_config_port(tty); |
f1d03228 | 829 | port->port.flags |= ASYNC_INITIALIZED; |
1da177e4 | 830 | spin_unlock_irqrestore(&card->card_lock, flags); |
d8d16e47 JS |
831 | |
832 | return 0; | |
833 | } | |
834 | ||
31f35939 AC |
835 | static int isicom_carrier_raised(struct tty_port *port) |
836 | { | |
837 | struct isi_port *ip = container_of(port, struct isi_port, port); | |
838 | return (ip->status & ISI_DCD)?1 : 0; | |
839 | } | |
840 | ||
a547dfe9 | 841 | static int block_til_ready(struct tty_struct *tty, struct file *filp, |
31f35939 | 842 | struct isi_port *ip) |
1da177e4 | 843 | { |
31f35939 | 844 | struct tty_port *port = &ip->port; |
1da177e4 LT |
845 | int do_clocal = 0, retval; |
846 | unsigned long flags; | |
847 | DECLARE_WAITQUEUE(wait, current); | |
31f35939 | 848 | int cd; |
1da177e4 LT |
849 | |
850 | /* block if port is in the process of being closed */ | |
851 | ||
31f35939 | 852 | if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) { |
aaa246ea | 853 | pr_dbg("block_til_ready: close in progress.\n"); |
31f35939 AC |
854 | interruptible_sleep_on(&port->close_wait); |
855 | if (port->flags & ASYNC_HUP_NOTIFY) | |
1da177e4 LT |
856 | return -EAGAIN; |
857 | else | |
858 | return -ERESTARTSYS; | |
859 | } | |
d8d16e47 | 860 | |
1da177e4 | 861 | /* if non-blocking mode is set ... */ |
d8d16e47 | 862 | |
a547dfe9 JS |
863 | if ((filp->f_flags & O_NONBLOCK) || |
864 | (tty->flags & (1 << TTY_IO_ERROR))) { | |
aaa246ea | 865 | pr_dbg("block_til_ready: non-block mode.\n"); |
31f35939 | 866 | port->flags |= ASYNC_NORMAL_ACTIVE; |
d8d16e47 JS |
867 | return 0; |
868 | } | |
869 | ||
1da177e4 LT |
870 | if (C_CLOCAL(tty)) |
871 | do_clocal = 1; | |
d8d16e47 JS |
872 | |
873 | /* block waiting for DCD to be asserted, and while | |
1da177e4 LT |
874 | callout dev is busy */ |
875 | retval = 0; | |
31f35939 | 876 | add_wait_queue(&port->open_wait, &wait); |
1da177e4 | 877 | |
3e61696b | 878 | spin_lock_irqsave(&port->lock, flags); |
1da177e4 | 879 | if (!tty_hung_up_p(filp)) |
31f35939 AC |
880 | port->count--; |
881 | port->blocked_open++; | |
3e61696b | 882 | spin_unlock_irqrestore(&port->lock, flags); |
d8d16e47 | 883 | |
1da177e4 | 884 | while (1) { |
5d951fb4 | 885 | tty_port_raise_dtr_rts(port); |
1da177e4 LT |
886 | |
887 | set_current_state(TASK_INTERRUPTIBLE); | |
31f35939 AC |
888 | if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) { |
889 | if (port->flags & ASYNC_HUP_NOTIFY) | |
1da177e4 LT |
890 | retval = -EAGAIN; |
891 | else | |
892 | retval = -ERESTARTSYS; | |
893 | break; | |
d8d16e47 | 894 | } |
31f35939 AC |
895 | cd = tty_port_carrier_raised(port); |
896 | if (!(port->flags & ASYNC_CLOSING) && | |
897 | (do_clocal || cd)) | |
1da177e4 | 898 | break; |
1da177e4 LT |
899 | if (signal_pending(current)) { |
900 | retval = -ERESTARTSYS; | |
901 | break; | |
902 | } | |
d8d16e47 | 903 | schedule(); |
1da177e4 LT |
904 | } |
905 | set_current_state(TASK_RUNNING); | |
31f35939 | 906 | remove_wait_queue(&port->open_wait, &wait); |
3e61696b | 907 | spin_lock_irqsave(&port->lock, flags); |
1da177e4 | 908 | if (!tty_hung_up_p(filp)) |
31f35939 AC |
909 | port->count++; |
910 | port->blocked_open--; | |
3e61696b AC |
911 | if (retval == 0) |
912 | port->flags |= ASYNC_NORMAL_ACTIVE; | |
913 | spin_unlock_irqrestore(&port->lock, flags); | |
1da177e4 LT |
914 | return 0; |
915 | } | |
d8d16e47 JS |
916 | |
917 | static int isicom_open(struct tty_struct *tty, struct file *filp) | |
1da177e4 | 918 | { |
d8d16e47 JS |
919 | struct isi_port *port; |
920 | struct isi_board *card; | |
17c4edf0 JS |
921 | unsigned int board; |
922 | int error, line; | |
1da177e4 LT |
923 | |
924 | line = tty->index; | |
925 | if (line < 0 || line > PORT_COUNT-1) | |
926 | return -ENODEV; | |
927 | board = BOARD(line); | |
928 | card = &isi_card[board]; | |
d8d16e47 | 929 | |
1da177e4 LT |
930 | if (!(card->status & FIRMWARE_LOADED)) |
931 | return -ENODEV; | |
d8d16e47 | 932 | |
1da177e4 LT |
933 | /* open on a port greater than the port count for the card !!! */ |
934 | if (line > ((board * 16) + card->port_count - 1)) | |
935 | return -ENODEV; | |
936 | ||
d8d16e47 | 937 | port = &isi_ports[line]; |
1da177e4 LT |
938 | if (isicom_paranoia_check(port, tty->name, "isicom_open")) |
939 | return -ENODEV; | |
d8d16e47 JS |
940 | |
941 | isicom_setup_board(card); | |
942 | ||
f1d03228 | 943 | port->port.count++; |
1da177e4 | 944 | tty->driver_data = port; |
d450b5a0 AC |
945 | tty_port_tty_set(&port->port, tty); |
946 | error = isicom_setup_port(tty); | |
251b8dd7 AC |
947 | if (error == 0) |
948 | error = block_til_ready(tty, filp, port); | |
949 | return error; | |
1da177e4 | 950 | } |
d8d16e47 | 951 | |
1da177e4 LT |
952 | /* close et all */ |
953 | ||
d8d16e47 | 954 | static inline void isicom_shutdown_board(struct isi_board *bp) |
1da177e4 | 955 | { |
251b8dd7 | 956 | if (bp->status & BOARD_ACTIVE) |
1da177e4 | 957 | bp->status &= ~BOARD_ACTIVE; |
1da177e4 LT |
958 | } |
959 | ||
cfe7c09a | 960 | /* card->lock HAS to be held */ |
d8d16e47 | 961 | static void isicom_shutdown_port(struct isi_port *port) |
1da177e4 | 962 | { |
d8d16e47 JS |
963 | struct isi_board *card = port->card; |
964 | struct tty_struct *tty; | |
d8d16e47 | 965 | |
d450b5a0 | 966 | tty = tty_port_tty_get(&port->port); |
1da177e4 | 967 | |
d450b5a0 AC |
968 | if (!(port->port.flags & ASYNC_INITIALIZED)) { |
969 | tty_kref_put(tty); | |
1da177e4 | 970 | return; |
d450b5a0 | 971 | } |
cfe7c09a | 972 | |
f1d03228 AC |
973 | tty_port_free_xmit_buf(&port->port); |
974 | port->port.flags &= ~ASYNC_INITIALIZED; | |
1da177e4 | 975 | /* 3rd October 2000 : Vinayak P Risbud */ |
d450b5a0 | 976 | tty_port_tty_set(&port->port, NULL); |
d8d16e47 | 977 | |
1da177e4 LT |
978 | /*Fix done by Anil .S on 30-04-2001 |
979 | remote login through isi port has dtr toggle problem | |
980 | due to which the carrier drops before the password prompt | |
d8d16e47 | 981 | appears on the remote end. Now we drop the dtr only if the |
1da177e4 | 982 | HUPCL(Hangup on close) flag is set for the tty*/ |
d8d16e47 JS |
983 | |
984 | if (C_HUPCL(tty)) | |
1da177e4 LT |
985 | /* drop dtr on this port */ |
986 | drop_dtr(port); | |
d8d16e47 JS |
987 | |
988 | /* any other port uninits */ | |
1da177e4 LT |
989 | if (tty) |
990 | set_bit(TTY_IO_ERROR, &tty->flags); | |
d8d16e47 | 991 | |
1da177e4 | 992 | if (--card->count < 0) { |
aaa246ea | 993 | pr_dbg("isicom_shutdown_port: bad board(0x%lx) count %d.\n", |
1da177e4 | 994 | card->base, card->count); |
d8d16e47 | 995 | card->count = 0; |
1da177e4 | 996 | } |
d8d16e47 | 997 | |
a547dfe9 | 998 | /* last port was closed, shutdown that boad too */ |
d8d16e47 | 999 | if (C_HUPCL(tty)) { |
1da177e4 LT |
1000 | if (!card->count) |
1001 | isicom_shutdown_board(card); | |
1002 | } | |
1003 | } | |
1004 | ||
978e595f AC |
1005 | static void isicom_flush_buffer(struct tty_struct *tty) |
1006 | { | |
1007 | struct isi_port *port = tty->driver_data; | |
1008 | struct isi_board *card = port->card; | |
1009 | unsigned long flags; | |
1010 | ||
1011 | if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer")) | |
1012 | return; | |
1013 | ||
1014 | spin_lock_irqsave(&card->card_lock, flags); | |
1015 | port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; | |
1016 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1017 | ||
1018 | tty_wakeup(tty); | |
1019 | } | |
1020 | ||
d8d16e47 | 1021 | static void isicom_close(struct tty_struct *tty, struct file *filp) |
1da177e4 | 1022 | { |
8070e35c | 1023 | struct isi_port *port = tty->driver_data; |
c387fd85 | 1024 | struct isi_board *card; |
1da177e4 | 1025 | unsigned long flags; |
d8d16e47 | 1026 | |
1da177e4 LT |
1027 | if (!port) |
1028 | return; | |
c387fd85 | 1029 | card = port->card; |
1da177e4 LT |
1030 | if (isicom_paranoia_check(port, tty->name, "isicom_close")) |
1031 | return; | |
d8d16e47 | 1032 | |
aaa246ea | 1033 | pr_dbg("Close start!!!.\n"); |
d8d16e47 | 1034 | |
3e61696b | 1035 | spin_lock_irqsave(&port->port.lock, flags); |
1da177e4 | 1036 | if (tty_hung_up_p(filp)) { |
3e61696b | 1037 | spin_unlock_irqrestore(&port->port.lock, flags); |
1da177e4 LT |
1038 | return; |
1039 | } | |
d8d16e47 | 1040 | |
f1d03228 | 1041 | if (tty->count == 1 && port->port.count != 1) { |
a547dfe9 JS |
1042 | printk(KERN_WARNING "ISICOM:(0x%lx) isicom_close: bad port " |
1043 | "count tty->count = 1 port count = %d.\n", | |
f1d03228 AC |
1044 | card->base, port->port.count); |
1045 | port->port.count = 1; | |
1da177e4 | 1046 | } |
f1d03228 | 1047 | if (--port->port.count < 0) { |
a547dfe9 JS |
1048 | printk(KERN_WARNING "ISICOM:(0x%lx) isicom_close: bad port " |
1049 | "count for channel%d = %d", card->base, port->channel, | |
f1d03228 AC |
1050 | port->port.count); |
1051 | port->port.count = 0; | |
1da177e4 | 1052 | } |
d8d16e47 | 1053 | |
f1d03228 | 1054 | if (port->port.count) { |
3e61696b | 1055 | spin_unlock_irqrestore(&port->port.lock, flags); |
1da177e4 | 1056 | return; |
d8d16e47 | 1057 | } |
f1d03228 | 1058 | port->port.flags |= ASYNC_CLOSING; |
1da177e4 | 1059 | tty->closing = 1; |
3e61696b | 1060 | spin_unlock_irqrestore(&port->port.lock, flags); |
d8d16e47 | 1061 | |
44b7d1b3 AC |
1062 | if (port->port.closing_wait != ASYNC_CLOSING_WAIT_NONE) |
1063 | tty_wait_until_sent(tty, port->port.closing_wait); | |
d8d16e47 | 1064 | /* indicate to the card that no more data can be received |
1da177e4 LT |
1065 | on this port */ |
1066 | spin_lock_irqsave(&card->card_lock, flags); | |
f1d03228 | 1067 | if (port->port.flags & ASYNC_INITIALIZED) { |
1da177e4 LT |
1068 | card->port_status &= ~(1 << port->channel); |
1069 | outw(card->port_status, card->base + 0x02); | |
d8d16e47 | 1070 | } |
1da177e4 LT |
1071 | isicom_shutdown_port(port); |
1072 | spin_unlock_irqrestore(&card->card_lock, flags); | |
d8d16e47 | 1073 | |
978e595f | 1074 | isicom_flush_buffer(tty); |
1da177e4 LT |
1075 | tty_ldisc_flush(tty); |
1076 | ||
3e61696b | 1077 | spin_lock_irqsave(&port->port.lock, flags); |
1da177e4 LT |
1078 | tty->closing = 0; |
1079 | ||
f1d03228 | 1080 | if (port->port.blocked_open) { |
3e61696b | 1081 | spin_unlock_irqrestore(&port->port.lock, flags); |
44b7d1b3 | 1082 | if (port->port.close_delay) { |
aaa246ea | 1083 | pr_dbg("scheduling until time out.\n"); |
a547dfe9 | 1084 | msleep_interruptible( |
44b7d1b3 | 1085 | jiffies_to_msecs(port->port.close_delay)); |
1da177e4 | 1086 | } |
3e61696b | 1087 | spin_lock_irqsave(&port->port.lock, flags); |
f1d03228 | 1088 | wake_up_interruptible(&port->port.open_wait); |
d8d16e47 | 1089 | } |
f1d03228 AC |
1090 | port->port.flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING); |
1091 | wake_up_interruptible(&port->port.close_wait); | |
3e61696b | 1092 | spin_unlock_irqrestore(&port->port.lock, flags); |
1da177e4 LT |
1093 | } |
1094 | ||
1095 | /* write et all */ | |
d8d16e47 JS |
1096 | static int isicom_write(struct tty_struct *tty, const unsigned char *buf, |
1097 | int count) | |
1da177e4 | 1098 | { |
8070e35c | 1099 | struct isi_port *port = tty->driver_data; |
d8d16e47 | 1100 | struct isi_board *card = port->card; |
1da177e4 LT |
1101 | unsigned long flags; |
1102 | int cnt, total = 0; | |
1103 | ||
1104 | if (isicom_paranoia_check(port, tty->name, "isicom_write")) | |
1105 | return 0; | |
d8d16e47 | 1106 | |
1da177e4 | 1107 | spin_lock_irqsave(&card->card_lock, flags); |
d8d16e47 | 1108 | |
251b8dd7 | 1109 | while (1) { |
a547dfe9 JS |
1110 | cnt = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt |
1111 | - 1, SERIAL_XMIT_SIZE - port->xmit_head)); | |
d8d16e47 | 1112 | if (cnt <= 0) |
1da177e4 | 1113 | break; |
d8d16e47 | 1114 | |
f1d03228 | 1115 | memcpy(port->port.xmit_buf + port->xmit_head, buf, cnt); |
a547dfe9 JS |
1116 | port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE |
1117 | - 1); | |
1da177e4 LT |
1118 | port->xmit_cnt += cnt; |
1119 | buf += cnt; | |
1120 | count -= cnt; | |
1121 | total += cnt; | |
d8d16e47 | 1122 | } |
1da177e4 LT |
1123 | if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped) |
1124 | port->status |= ISI_TXOK; | |
1125 | spin_unlock_irqrestore(&card->card_lock, flags); | |
d8d16e47 | 1126 | return total; |
1da177e4 LT |
1127 | } |
1128 | ||
1129 | /* put_char et all */ | |
f34d7a5b | 1130 | static int isicom_put_char(struct tty_struct *tty, unsigned char ch) |
1da177e4 | 1131 | { |
8070e35c | 1132 | struct isi_port *port = tty->driver_data; |
d8d16e47 | 1133 | struct isi_board *card = port->card; |
1da177e4 | 1134 | unsigned long flags; |
d8d16e47 | 1135 | |
1da177e4 | 1136 | if (isicom_paranoia_check(port, tty->name, "isicom_put_char")) |
f34d7a5b | 1137 | return 0; |
d8d16e47 | 1138 | |
1da177e4 | 1139 | spin_lock_irqsave(&card->card_lock, flags); |
f34d7a5b AC |
1140 | if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) { |
1141 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1142 | return 0; | |
1143 | } | |
d8d16e47 | 1144 | |
f1d03228 | 1145 | port->port.xmit_buf[port->xmit_head++] = ch; |
1da177e4 LT |
1146 | port->xmit_head &= (SERIAL_XMIT_SIZE - 1); |
1147 | port->xmit_cnt++; | |
1148 | spin_unlock_irqrestore(&card->card_lock, flags); | |
f34d7a5b | 1149 | return 1; |
1da177e4 LT |
1150 | } |
1151 | ||
1152 | /* flush_chars et all */ | |
d8d16e47 | 1153 | static void isicom_flush_chars(struct tty_struct *tty) |
1da177e4 | 1154 | { |
8070e35c | 1155 | struct isi_port *port = tty->driver_data; |
d8d16e47 | 1156 | |
1da177e4 LT |
1157 | if (isicom_paranoia_check(port, tty->name, "isicom_flush_chars")) |
1158 | return; | |
d8d16e47 | 1159 | |
a547dfe9 | 1160 | if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped || |
f1d03228 | 1161 | !port->port.xmit_buf) |
1da177e4 | 1162 | return; |
d8d16e47 | 1163 | |
1da177e4 LT |
1164 | /* this tells the transmitter to consider this port for |
1165 | data output to the card ... that's the best we can do. */ | |
d8d16e47 | 1166 | port->status |= ISI_TXOK; |
1da177e4 LT |
1167 | } |
1168 | ||
1169 | /* write_room et all */ | |
d8d16e47 | 1170 | static int isicom_write_room(struct tty_struct *tty) |
1da177e4 | 1171 | { |
8070e35c | 1172 | struct isi_port *port = tty->driver_data; |
1da177e4 LT |
1173 | int free; |
1174 | ||
1175 | if (isicom_paranoia_check(port, tty->name, "isicom_write_room")) | |
1176 | return 0; | |
d8d16e47 | 1177 | |
1da177e4 LT |
1178 | free = SERIAL_XMIT_SIZE - port->xmit_cnt - 1; |
1179 | if (free < 0) | |
1180 | free = 0; | |
1181 | return free; | |
1182 | } | |
1183 | ||
1184 | /* chars_in_buffer et all */ | |
d8d16e47 | 1185 | static int isicom_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 1186 | { |
8070e35c | 1187 | struct isi_port *port = tty->driver_data; |
1da177e4 LT |
1188 | if (isicom_paranoia_check(port, tty->name, "isicom_chars_in_buffer")) |
1189 | return 0; | |
1190 | return port->xmit_cnt; | |
1191 | } | |
1192 | ||
1193 | /* ioctl et all */ | |
6d889724 | 1194 | static int isicom_send_break(struct tty_struct *tty, int length) |
1da177e4 | 1195 | { |
6d889724 | 1196 | struct isi_port *port = tty->driver_data; |
d8d16e47 | 1197 | struct isi_board *card = port->card; |
8070e35c | 1198 | unsigned long base = card->base; |
d8d16e47 | 1199 | |
6d889724 AC |
1200 | if (length == -1) |
1201 | return -EOPNOTSUPP; | |
1202 | ||
d8d16e47 | 1203 | if (!lock_card(card)) |
6d889724 | 1204 | return -EINVAL; |
d8d16e47 | 1205 | |
1da177e4 LT |
1206 | outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base); |
1207 | outw((length & 0xff) << 8 | 0x00, base); | |
1208 | outw((length & 0xff00), base); | |
1209 | InterruptTheCard(base); | |
1210 | ||
1211 | unlock_card(card); | |
6d889724 | 1212 | return 0; |
1da177e4 LT |
1213 | } |
1214 | ||
1215 | static int isicom_tiocmget(struct tty_struct *tty, struct file *file) | |
1216 | { | |
8070e35c | 1217 | struct isi_port *port = tty->driver_data; |
1da177e4 | 1218 | /* just send the port status */ |
8070e35c | 1219 | u16 status = port->status; |
1da177e4 LT |
1220 | |
1221 | if (isicom_paranoia_check(port, tty->name, "isicom_ioctl")) | |
1222 | return -ENODEV; | |
d8d16e47 | 1223 | |
1da177e4 LT |
1224 | return ((status & ISI_RTS) ? TIOCM_RTS : 0) | |
1225 | ((status & ISI_DTR) ? TIOCM_DTR : 0) | | |
1226 | ((status & ISI_DCD) ? TIOCM_CAR : 0) | | |
1227 | ((status & ISI_DSR) ? TIOCM_DSR : 0) | | |
1228 | ((status & ISI_CTS) ? TIOCM_CTS : 0) | | |
1229 | ((status & ISI_RI ) ? TIOCM_RI : 0); | |
1230 | } | |
1231 | ||
1232 | static int isicom_tiocmset(struct tty_struct *tty, struct file *file, | |
d8d16e47 | 1233 | unsigned int set, unsigned int clear) |
1da177e4 | 1234 | { |
8070e35c | 1235 | struct isi_port *port = tty->driver_data; |
cfe7c09a | 1236 | unsigned long flags; |
d8d16e47 | 1237 | |
1da177e4 LT |
1238 | if (isicom_paranoia_check(port, tty->name, "isicom_ioctl")) |
1239 | return -ENODEV; | |
d8d16e47 | 1240 | |
cfe7c09a | 1241 | spin_lock_irqsave(&port->card->card_lock, flags); |
1da177e4 LT |
1242 | if (set & TIOCM_RTS) |
1243 | raise_rts(port); | |
1244 | if (set & TIOCM_DTR) | |
1245 | raise_dtr(port); | |
1246 | ||
1247 | if (clear & TIOCM_RTS) | |
1248 | drop_rts(port); | |
1249 | if (clear & TIOCM_DTR) | |
1250 | drop_dtr(port); | |
cfe7c09a | 1251 | spin_unlock_irqrestore(&port->card->card_lock, flags); |
1da177e4 LT |
1252 | |
1253 | return 0; | |
d8d16e47 | 1254 | } |
1da177e4 | 1255 | |
d450b5a0 AC |
1256 | static int isicom_set_serial_info(struct tty_struct *tty, |
1257 | struct serial_struct __user *info) | |
1da177e4 | 1258 | { |
d450b5a0 | 1259 | struct isi_port *port = tty->driver_data; |
1da177e4 LT |
1260 | struct serial_struct newinfo; |
1261 | int reconfig_port; | |
1262 | ||
d8d16e47 | 1263 | if (copy_from_user(&newinfo, info, sizeof(newinfo))) |
1da177e4 | 1264 | return -EFAULT; |
d8d16e47 | 1265 | |
1eac4947 AC |
1266 | lock_kernel(); |
1267 | ||
f1d03228 | 1268 | reconfig_port = ((port->port.flags & ASYNC_SPD_MASK) != |
d8d16e47 JS |
1269 | (newinfo.flags & ASYNC_SPD_MASK)); |
1270 | ||
1da177e4 | 1271 | if (!capable(CAP_SYS_ADMIN)) { |
44b7d1b3 AC |
1272 | if ((newinfo.close_delay != port->port.close_delay) || |
1273 | (newinfo.closing_wait != port->port.closing_wait) || | |
d8d16e47 | 1274 | ((newinfo.flags & ~ASYNC_USR_MASK) != |
f1d03228 | 1275 | (port->port.flags & ~ASYNC_USR_MASK))) { |
1eac4947 | 1276 | unlock_kernel(); |
1da177e4 | 1277 | return -EPERM; |
1eac4947 | 1278 | } |
f1d03228 | 1279 | port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) | |
1da177e4 | 1280 | (newinfo.flags & ASYNC_USR_MASK)); |
251b8dd7 | 1281 | } else { |
44b7d1b3 AC |
1282 | port->port.close_delay = newinfo.close_delay; |
1283 | port->port.closing_wait = newinfo.closing_wait; | |
f1d03228 | 1284 | port->port.flags = ((port->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); | |
d450b5a0 | 1290 | isicom_config_port(tty); |
cfe7c09a | 1291 | spin_unlock_irqrestore(&port->card->card_lock, flags); |
1da177e4 | 1292 | } |
1eac4947 | 1293 | unlock_kernel(); |
d8d16e47 JS |
1294 | return 0; |
1295 | } | |
1da177e4 | 1296 | |
d8d16e47 JS |
1297 | static int isicom_get_serial_info(struct isi_port *port, |
1298 | struct serial_struct __user *info) | |
1da177e4 LT |
1299 | { |
1300 | struct serial_struct out_info; | |
d8d16e47 | 1301 | |
1eac4947 | 1302 | lock_kernel(); |
1da177e4 LT |
1303 | memset(&out_info, 0, sizeof(out_info)); |
1304 | /* out_info.type = ? */ | |
1305 | out_info.line = port - isi_ports; | |
1306 | out_info.port = port->card->base; | |
1307 | out_info.irq = port->card->irq; | |
f1d03228 | 1308 | out_info.flags = port->port.flags; |
1da177e4 | 1309 | /* out_info.baud_base = ? */ |
44b7d1b3 AC |
1310 | out_info.close_delay = port->port.close_delay; |
1311 | out_info.closing_wait = port->port.closing_wait; | |
1eac4947 | 1312 | unlock_kernel(); |
d8d16e47 | 1313 | if (copy_to_user(info, &out_info, sizeof(out_info))) |
1da177e4 LT |
1314 | return -EFAULT; |
1315 | return 0; | |
d8d16e47 | 1316 | } |
1da177e4 | 1317 | |
d8d16e47 JS |
1318 | static int isicom_ioctl(struct tty_struct *tty, struct file *filp, |
1319 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1320 | { |
8070e35c | 1321 | struct isi_port *port = tty->driver_data; |
1da177e4 | 1322 | void __user *argp = (void __user *)arg; |
1da177e4 LT |
1323 | |
1324 | if (isicom_paranoia_check(port, tty->name, "isicom_ioctl")) | |
1325 | return -ENODEV; | |
1326 | ||
251b8dd7 | 1327 | switch (cmd) { |
d8d16e47 JS |
1328 | case TIOCGSERIAL: |
1329 | return isicom_get_serial_info(port, argp); | |
1330 | ||
1331 | case TIOCSSERIAL: | |
d450b5a0 | 1332 | return isicom_set_serial_info(tty, argp); |
d8d16e47 JS |
1333 | |
1334 | default: | |
1335 | return -ENOIOCTLCMD; | |
1da177e4 LT |
1336 | } |
1337 | return 0; | |
1338 | } | |
1339 | ||
1340 | /* set_termios et all */ | |
d8d16e47 | 1341 | static void isicom_set_termios(struct tty_struct *tty, |
606d099c | 1342 | struct ktermios *old_termios) |
1da177e4 | 1343 | { |
8070e35c | 1344 | struct isi_port *port = tty->driver_data; |
cfe7c09a | 1345 | unsigned long flags; |
d8d16e47 | 1346 | |
1da177e4 LT |
1347 | if (isicom_paranoia_check(port, tty->name, "isicom_set_termios")) |
1348 | return; | |
d8d16e47 | 1349 | |
1da177e4 | 1350 | if (tty->termios->c_cflag == old_termios->c_cflag && |
d8d16e47 | 1351 | tty->termios->c_iflag == old_termios->c_iflag) |
1da177e4 | 1352 | return; |
d8d16e47 | 1353 | |
cfe7c09a | 1354 | spin_lock_irqsave(&port->card->card_lock, flags); |
d450b5a0 | 1355 | isicom_config_port(tty); |
cfe7c09a | 1356 | spin_unlock_irqrestore(&port->card->card_lock, flags); |
d8d16e47 | 1357 | |
1da177e4 | 1358 | if ((old_termios->c_cflag & CRTSCTS) && |
d8d16e47 | 1359 | !(tty->termios->c_cflag & CRTSCTS)) { |
1da177e4 | 1360 | tty->hw_stopped = 0; |
d8d16e47 JS |
1361 | isicom_start(tty); |
1362 | } | |
1da177e4 LT |
1363 | } |
1364 | ||
1365 | /* throttle et all */ | |
d8d16e47 | 1366 | static void isicom_throttle(struct tty_struct *tty) |
1da177e4 | 1367 | { |
8070e35c | 1368 | struct isi_port *port = tty->driver_data; |
d8d16e47 JS |
1369 | struct isi_board *card = port->card; |
1370 | ||
1da177e4 LT |
1371 | if (isicom_paranoia_check(port, tty->name, "isicom_throttle")) |
1372 | return; | |
d8d16e47 | 1373 | |
1da177e4 LT |
1374 | /* tell the card that this port cannot handle any more data for now */ |
1375 | card->port_status &= ~(1 << port->channel); | |
1376 | outw(card->port_status, card->base + 0x02); | |
1377 | } | |
1378 | ||
1379 | /* unthrottle et all */ | |
d8d16e47 | 1380 | static void isicom_unthrottle(struct tty_struct *tty) |
1da177e4 | 1381 | { |
8070e35c | 1382 | struct isi_port *port = tty->driver_data; |
d8d16e47 JS |
1383 | struct isi_board *card = port->card; |
1384 | ||
1da177e4 LT |
1385 | if (isicom_paranoia_check(port, tty->name, "isicom_unthrottle")) |
1386 | return; | |
d8d16e47 | 1387 | |
1da177e4 LT |
1388 | /* tell the card that this port is ready to accept more data */ |
1389 | card->port_status |= (1 << port->channel); | |
1390 | outw(card->port_status, card->base + 0x02); | |
1391 | } | |
1392 | ||
1393 | /* stop et all */ | |
d8d16e47 | 1394 | static void isicom_stop(struct tty_struct *tty) |
1da177e4 | 1395 | { |
8070e35c | 1396 | struct isi_port *port = tty->driver_data; |
1da177e4 LT |
1397 | |
1398 | if (isicom_paranoia_check(port, tty->name, "isicom_stop")) | |
1399 | return; | |
d8d16e47 | 1400 | |
1da177e4 LT |
1401 | /* this tells the transmitter not to consider this port for |
1402 | data output to the card. */ | |
1403 | port->status &= ~ISI_TXOK; | |
1404 | } | |
1405 | ||
1406 | /* start et all */ | |
d8d16e47 | 1407 | static void isicom_start(struct tty_struct *tty) |
1da177e4 | 1408 | { |
8070e35c | 1409 | struct isi_port *port = tty->driver_data; |
d8d16e47 | 1410 | |
1da177e4 LT |
1411 | if (isicom_paranoia_check(port, tty->name, "isicom_start")) |
1412 | return; | |
d8d16e47 | 1413 | |
1da177e4 LT |
1414 | /* this tells the transmitter to consider this port for |
1415 | data output to the card. */ | |
1416 | port->status |= ISI_TXOK; | |
1417 | } | |
1418 | ||
d8d16e47 | 1419 | static void isicom_hangup(struct tty_struct *tty) |
1da177e4 | 1420 | { |
8070e35c | 1421 | struct isi_port *port = tty->driver_data; |
cfe7c09a | 1422 | unsigned long flags; |
d8d16e47 | 1423 | |
1da177e4 LT |
1424 | if (isicom_paranoia_check(port, tty->name, "isicom_hangup")) |
1425 | return; | |
d8d16e47 | 1426 | |
cfe7c09a | 1427 | spin_lock_irqsave(&port->card->card_lock, flags); |
1da177e4 | 1428 | isicom_shutdown_port(port); |
cfe7c09a JS |
1429 | spin_unlock_irqrestore(&port->card->card_lock, flags); |
1430 | ||
3e61696b | 1431 | tty_port_hangup(&port->port); |
1da177e4 LT |
1432 | } |
1433 | ||
1da177e4 | 1434 | |
9ac0948b JS |
1435 | /* |
1436 | * Driver init and deinit functions | |
1437 | */ | |
1da177e4 | 1438 | |
b68e31d0 | 1439 | static const struct tty_operations isicom_ops = { |
d8d16e47 JS |
1440 | .open = isicom_open, |
1441 | .close = isicom_close, | |
1442 | .write = isicom_write, | |
1443 | .put_char = isicom_put_char, | |
1444 | .flush_chars = isicom_flush_chars, | |
1445 | .write_room = isicom_write_room, | |
1da177e4 | 1446 | .chars_in_buffer = isicom_chars_in_buffer, |
d8d16e47 JS |
1447 | .ioctl = isicom_ioctl, |
1448 | .set_termios = isicom_set_termios, | |
1449 | .throttle = isicom_throttle, | |
1450 | .unthrottle = isicom_unthrottle, | |
1451 | .stop = isicom_stop, | |
1452 | .start = isicom_start, | |
1453 | .hangup = isicom_hangup, | |
1454 | .flush_buffer = isicom_flush_buffer, | |
1455 | .tiocmget = isicom_tiocmget, | |
1456 | .tiocmset = isicom_tiocmset, | |
6d889724 | 1457 | .break_ctl = isicom_send_break, |
1da177e4 LT |
1458 | }; |
1459 | ||
31f35939 AC |
1460 | static const struct tty_port_operations isicom_port_ops = { |
1461 | .carrier_raised = isicom_carrier_raised, | |
5d951fb4 | 1462 | .raise_dtr_rts = isicom_raise_dtr_rts, |
31f35939 AC |
1463 | }; |
1464 | ||
9ac0948b JS |
1465 | static int __devinit reset_card(struct pci_dev *pdev, |
1466 | const unsigned int card, unsigned int *signature) | |
1da177e4 | 1467 | { |
9ac0948b JS |
1468 | struct isi_board *board = pci_get_drvdata(pdev); |
1469 | unsigned long base = board->base; | |
f0a0ba6d | 1470 | unsigned int sig, portcount = 0; |
9ac0948b | 1471 | int retval = 0; |
d8d16e47 | 1472 | |
9ac0948b JS |
1473 | dev_dbg(&pdev->dev, "ISILoad:Resetting Card%d at 0x%lx\n", card + 1, |
1474 | base); | |
d8d16e47 | 1475 | |
9ac0948b | 1476 | inw(base + 0x8); |
d8d16e47 | 1477 | |
f0a0ba6d | 1478 | msleep(10); |
9ac0948b JS |
1479 | |
1480 | outw(0, base + 0x8); /* Reset */ | |
1481 | ||
f0a0ba6d | 1482 | msleep(1000); |
9ac0948b | 1483 | |
f0a0ba6d JS |
1484 | sig = inw(base + 0x4) & 0xff; |
1485 | ||
1486 | if (sig != 0xa5 && sig != 0xbb && sig != 0xcc && sig != 0xdd && | |
1487 | sig != 0xee) { | |
1488 | dev_warn(&pdev->dev, "ISILoad:Card%u reset failure (Possible " | |
1489 | "bad I/O Port Address 0x%lx).\n", card + 1, base); | |
1490 | dev_dbg(&pdev->dev, "Sig=0x%x\n", sig); | |
1491 | retval = -EIO; | |
1492 | goto end; | |
1493 | } | |
1494 | ||
1495 | msleep(10); | |
9ac0948b | 1496 | |
18234f88 | 1497 | portcount = inw(base + 0x2); |
07fb6f26 | 1498 | if (!(inw(base + 0xe) & 0x1) || (portcount != 0 && portcount != 4 && |
f0a0ba6d | 1499 | portcount != 8 && portcount != 16)) { |
898eb71c | 1500 | dev_err(&pdev->dev, "ISILoad:PCI Card%d reset failure.\n", |
f0a0ba6d | 1501 | card + 1); |
18234f88 JS |
1502 | retval = -EIO; |
1503 | goto end; | |
9ac0948b JS |
1504 | } |
1505 | ||
f0a0ba6d | 1506 | switch (sig) { |
9ac0948b JS |
1507 | case 0xa5: |
1508 | case 0xbb: | |
1509 | case 0xdd: | |
18234f88 | 1510 | board->port_count = (portcount == 4) ? 4 : 8; |
9ac0948b JS |
1511 | board->shift_count = 12; |
1512 | break; | |
1513 | case 0xcc: | |
f0a0ba6d | 1514 | case 0xee: |
9ac0948b JS |
1515 | board->port_count = 16; |
1516 | board->shift_count = 11; | |
1517 | break; | |
d8d16e47 | 1518 | } |
9ac0948b | 1519 | dev_info(&pdev->dev, "-Done\n"); |
f0a0ba6d | 1520 | *signature = sig; |
d8d16e47 | 1521 | |
9ac0948b JS |
1522 | end: |
1523 | return retval; | |
1da177e4 LT |
1524 | } |
1525 | ||
e65c1db1 JS |
1526 | static int __devinit load_firmware(struct pci_dev *pdev, |
1527 | const unsigned int index, const unsigned int signature) | |
1528 | { | |
1529 | struct isi_board *board = pci_get_drvdata(pdev); | |
1530 | const struct firmware *fw; | |
1531 | unsigned long base = board->base; | |
1532 | unsigned int a; | |
1533 | u16 word_count, status; | |
1534 | int retval = -EIO; | |
1535 | char *name; | |
1536 | u8 *data; | |
1537 | ||
1538 | struct stframe { | |
1539 | u16 addr; | |
1540 | u16 count; | |
1541 | u8 data[0]; | |
1542 | } *frame; | |
1543 | ||
1544 | switch (signature) { | |
1545 | case 0xa5: | |
1546 | name = "isi608.bin"; | |
1547 | break; | |
1548 | case 0xbb: | |
1549 | name = "isi608em.bin"; | |
1550 | break; | |
1551 | case 0xcc: | |
1552 | name = "isi616em.bin"; | |
1553 | break; | |
1554 | case 0xdd: | |
1555 | name = "isi4608.bin"; | |
1556 | break; | |
1557 | case 0xee: | |
1558 | name = "isi4616.bin"; | |
1559 | break; | |
1560 | default: | |
1561 | dev_err(&pdev->dev, "Unknown signature.\n"); | |
1562 | goto end; | |
251b8dd7 | 1563 | } |
e65c1db1 JS |
1564 | |
1565 | retval = request_firmware(&fw, name, &pdev->dev); | |
1566 | if (retval) | |
1567 | goto end; | |
1568 | ||
e4e04088 JS |
1569 | retval = -EIO; |
1570 | ||
e65c1db1 JS |
1571 | for (frame = (struct stframe *)fw->data; |
1572 | frame < (struct stframe *)(fw->data + fw->size); | |
e4e04088 JS |
1573 | frame = (struct stframe *)((u8 *)(frame + 1) + |
1574 | frame->count)) { | |
e65c1db1 JS |
1575 | if (WaitTillCardIsFree(base)) |
1576 | goto errrelfw; | |
1577 | ||
1578 | outw(0xf0, base); /* start upload sequence */ | |
1579 | outw(0x00, base); | |
1580 | outw(frame->addr, base); /* lsb of address */ | |
1581 | ||
1582 | word_count = frame->count / 2 + frame->count % 2; | |
1583 | outw(word_count, base); | |
1584 | InterruptTheCard(base); | |
1585 | ||
1586 | udelay(100); /* 0x2f */ | |
1587 | ||
1588 | if (WaitTillCardIsFree(base)) | |
1589 | goto errrelfw; | |
1590 | ||
251b8dd7 AC |
1591 | status = inw(base + 0x4); |
1592 | if (status != 0) { | |
e65c1db1 | 1593 | dev_warn(&pdev->dev, "Card%d rejected load header:\n" |
898eb71c JP |
1594 | KERN_WARNING "Address:0x%x\n" |
1595 | KERN_WARNING "Count:0x%x\n" | |
1596 | KERN_WARNING "Status:0x%x\n", | |
e65c1db1 JS |
1597 | index + 1, frame->addr, frame->count, status); |
1598 | goto errrelfw; | |
1599 | } | |
1600 | outsw(base, frame->data, word_count); | |
1601 | ||
1602 | InterruptTheCard(base); | |
1603 | ||
1604 | udelay(50); /* 0x0f */ | |
1605 | ||
1606 | if (WaitTillCardIsFree(base)) | |
1607 | goto errrelfw; | |
1608 | ||
251b8dd7 AC |
1609 | status = inw(base + 0x4); |
1610 | if (status != 0) { | |
e65c1db1 JS |
1611 | dev_err(&pdev->dev, "Card%d got out of sync.Card " |
1612 | "Status:0x%x\n", index + 1, status); | |
1613 | goto errrelfw; | |
1614 | } | |
251b8dd7 | 1615 | } |
e65c1db1 | 1616 | |
e65c1db1 JS |
1617 | /* XXX: should we test it by reading it back and comparing with original like |
1618 | * in load firmware package? */ | |
e4e04088 JS |
1619 | for (frame = (struct stframe *)fw->data; |
1620 | frame < (struct stframe *)(fw->data + fw->size); | |
1621 | frame = (struct stframe *)((u8 *)(frame + 1) + | |
1622 | frame->count)) { | |
e65c1db1 JS |
1623 | if (WaitTillCardIsFree(base)) |
1624 | goto errrelfw; | |
1625 | ||
1626 | outw(0xf1, base); /* start download sequence */ | |
1627 | outw(0x00, base); | |
1628 | outw(frame->addr, base); /* lsb of address */ | |
1629 | ||
1630 | word_count = (frame->count >> 1) + frame->count % 2; | |
1631 | outw(word_count + 1, base); | |
1632 | InterruptTheCard(base); | |
1633 | ||
1634 | udelay(50); /* 0xf */ | |
1635 | ||
1636 | if (WaitTillCardIsFree(base)) | |
1637 | goto errrelfw; | |
1638 | ||
251b8dd7 AC |
1639 | status = inw(base + 0x4); |
1640 | if (status != 0) { | |
e65c1db1 | 1641 | dev_warn(&pdev->dev, "Card%d rejected verify header:\n" |
898eb71c JP |
1642 | KERN_WARNING "Address:0x%x\n" |
1643 | KERN_WARNING "Count:0x%x\n" | |
1644 | KERN_WARNING "Status: 0x%x\n", | |
e65c1db1 JS |
1645 | index + 1, frame->addr, frame->count, status); |
1646 | goto errrelfw; | |
1647 | } | |
1648 | ||
1649 | data = kmalloc(word_count * 2, GFP_KERNEL); | |
f0671378 JS |
1650 | if (data == NULL) { |
1651 | dev_err(&pdev->dev, "Card%d, firmware upload " | |
1652 | "failed, not enough memory\n", index + 1); | |
1653 | goto errrelfw; | |
1654 | } | |
e65c1db1 JS |
1655 | inw(base); |
1656 | insw(base, data, word_count); | |
1657 | InterruptTheCard(base); | |
1658 | ||
1659 | for (a = 0; a < frame->count; a++) | |
1660 | if (data[a] != frame->data[a]) { | |
1661 | kfree(data); | |
1662 | dev_err(&pdev->dev, "Card%d, firmware upload " | |
1663 | "failed\n", index + 1); | |
1664 | goto errrelfw; | |
1665 | } | |
1666 | kfree(data); | |
1667 | ||
1668 | udelay(50); /* 0xf */ | |
1669 | ||
1670 | if (WaitTillCardIsFree(base)) | |
1671 | goto errrelfw; | |
1672 | ||
251b8dd7 AC |
1673 | status = inw(base + 0x4); |
1674 | if (status != 0) { | |
e65c1db1 JS |
1675 | dev_err(&pdev->dev, "Card%d verify got out of sync. " |
1676 | "Card Status:0x%x\n", index + 1, status); | |
1677 | goto errrelfw; | |
1678 | } | |
1679 | } | |
1680 | ||
e4e04088 JS |
1681 | /* xfer ctrl */ |
1682 | if (WaitTillCardIsFree(base)) | |
1683 | goto errrelfw; | |
1684 | ||
1685 | outw(0xf2, base); | |
1686 | outw(0x800, base); | |
1687 | outw(0x0, base); | |
1688 | outw(0x0, base); | |
1689 | InterruptTheCard(base); | |
1690 | outw(0x0, base + 0x4); /* for ISI4608 cards */ | |
1691 | ||
e65c1db1 JS |
1692 | board->status |= FIRMWARE_LOADED; |
1693 | retval = 0; | |
1694 | ||
1695 | errrelfw: | |
1696 | release_firmware(fw); | |
1697 | end: | |
1698 | return retval; | |
1699 | } | |
1700 | ||
1da177e4 LT |
1701 | /* |
1702 | * Insmod can set static symbols so keep these static | |
1703 | */ | |
1ed0c0b7 | 1704 | static unsigned int card_count; |
9ac0948b JS |
1705 | |
1706 | static int __devinit isicom_probe(struct pci_dev *pdev, | |
1707 | const struct pci_device_id *ent) | |
1708 | { | |
4969b3a4 | 1709 | unsigned int signature, index; |
9ac0948b | 1710 | int retval = -EPERM; |
9ac0948b JS |
1711 | struct isi_board *board = NULL; |
1712 | ||
1ed0c0b7 | 1713 | if (card_count >= BOARD_COUNT) |
9ac0948b JS |
1714 | goto err; |
1715 | ||
e1e5770b JS |
1716 | retval = pci_enable_device(pdev); |
1717 | if (retval) { | |
1718 | dev_err(&pdev->dev, "failed to enable\n"); | |
1719 | goto err; | |
1720 | } | |
1721 | ||
9ac0948b JS |
1722 | dev_info(&pdev->dev, "ISI PCI Card(Device ID 0x%x)\n", ent->device); |
1723 | ||
1724 | /* allot the first empty slot in the array */ | |
1725 | for (index = 0; index < BOARD_COUNT; index++) | |
1726 | if (isi_card[index].base == 0) { | |
1727 | board = &isi_card[index]; | |
1728 | break; | |
1729 | } | |
1730 | ||
938a7023 | 1731 | board->index = index; |
4969b3a4 JS |
1732 | board->base = pci_resource_start(pdev, 3); |
1733 | board->irq = pdev->irq; | |
1ed0c0b7 | 1734 | card_count++; |
9ac0948b JS |
1735 | |
1736 | pci_set_drvdata(pdev, board); | |
1737 | ||
78028da9 JS |
1738 | retval = pci_request_region(pdev, 3, ISICOM_NAME); |
1739 | if (retval) { | |
09a4a112 JS |
1740 | dev_err(&pdev->dev, "I/O Region 0x%lx-0x%lx is busy. Card%d " |
1741 | "will be disabled.\n", board->base, board->base + 15, | |
1742 | index + 1); | |
1743 | retval = -EBUSY; | |
1ed0c0b7 | 1744 | goto errdec; |
251b8dd7 | 1745 | } |
9ac0948b | 1746 | |
09a4a112 JS |
1747 | retval = request_irq(board->irq, isicom_interrupt, |
1748 | IRQF_SHARED | IRQF_DISABLED, ISICOM_NAME, board); | |
1749 | if (retval < 0) { | |
1750 | dev_err(&pdev->dev, "Could not install handler at Irq %d. " | |
1751 | "Card%d will be disabled.\n", board->irq, index + 1); | |
9ac0948b | 1752 | goto errunrr; |
09a4a112 | 1753 | } |
9ac0948b JS |
1754 | |
1755 | retval = reset_card(pdev, index, &signature); | |
1756 | if (retval < 0) | |
1757 | goto errunri; | |
1758 | ||
e65c1db1 JS |
1759 | retval = load_firmware(pdev, index, signature); |
1760 | if (retval < 0) | |
1761 | goto errunri; | |
1762 | ||
938a7023 JS |
1763 | for (index = 0; index < board->port_count; index++) |
1764 | tty_register_device(isicom_normal, board->index * 16 + index, | |
1765 | &pdev->dev); | |
1766 | ||
9ac0948b JS |
1767 | return 0; |
1768 | ||
1769 | errunri: | |
1770 | free_irq(board->irq, board); | |
1771 | errunrr: | |
78028da9 | 1772 | pci_release_region(pdev, 3); |
1ed0c0b7 | 1773 | errdec: |
9ac0948b | 1774 | board->base = 0; |
1ed0c0b7 | 1775 | card_count--; |
e1e5770b | 1776 | pci_disable_device(pdev); |
1ed0c0b7 | 1777 | err: |
9ac0948b JS |
1778 | return retval; |
1779 | } | |
1780 | ||
1781 | static void __devexit isicom_remove(struct pci_dev *pdev) | |
1782 | { | |
1783 | struct isi_board *board = pci_get_drvdata(pdev); | |
938a7023 JS |
1784 | unsigned int i; |
1785 | ||
1786 | for (i = 0; i < board->port_count; i++) | |
1787 | tty_unregister_device(isicom_normal, board->index * 16 + i); | |
9ac0948b JS |
1788 | |
1789 | free_irq(board->irq, board); | |
78028da9 | 1790 | pci_release_region(pdev, 3); |
1ed0c0b7 JS |
1791 | board->base = 0; |
1792 | card_count--; | |
e1e5770b | 1793 | pci_disable_device(pdev); |
9ac0948b | 1794 | } |
1da177e4 | 1795 | |
ca262005 | 1796 | static int __init isicom_init(void) |
1da177e4 | 1797 | { |
9ac0948b JS |
1798 | int retval, idx, channel; |
1799 | struct isi_port *port; | |
d8d16e47 | 1800 | |
251b8dd7 | 1801 | for (idx = 0; idx < BOARD_COUNT; idx++) { |
9ac0948b JS |
1802 | port = &isi_ports[idx * 16]; |
1803 | isi_card[idx].ports = port; | |
1804 | spin_lock_init(&isi_card[idx].card_lock); | |
1805 | for (channel = 0; channel < 16; channel++, port++) { | |
44b7d1b3 | 1806 | tty_port_init(&port->port); |
31f35939 | 1807 | port->port.ops = &isicom_port_ops; |
9ac0948b JS |
1808 | port->magic = ISICOM_MAGIC; |
1809 | port->card = &isi_card[idx]; | |
1810 | port->channel = channel; | |
44b7d1b3 AC |
1811 | port->port.close_delay = 50 * HZ/100; |
1812 | port->port.closing_wait = 3000 * HZ/100; | |
9ac0948b | 1813 | port->status = 0; |
9ac0948b | 1814 | /* . . . */ |
251b8dd7 | 1815 | } |
9ac0948b JS |
1816 | isi_card[idx].base = 0; |
1817 | isi_card[idx].irq = 0; | |
1da177e4 | 1818 | } |
d8d16e47 | 1819 | |
09a4a112 JS |
1820 | /* tty driver structure initialization */ |
1821 | isicom_normal = alloc_tty_driver(PORT_COUNT); | |
1822 | if (!isicom_normal) { | |
1823 | retval = -ENOMEM; | |
9ac0948b | 1824 | goto error; |
09a4a112 JS |
1825 | } |
1826 | ||
1827 | isicom_normal->owner = THIS_MODULE; | |
1828 | isicom_normal->name = "ttyM"; | |
1829 | isicom_normal->major = ISICOM_NMAJOR; | |
1830 | isicom_normal->minor_start = 0; | |
1831 | isicom_normal->type = TTY_DRIVER_TYPE_SERIAL; | |
1832 | isicom_normal->subtype = SERIAL_TYPE_NORMAL; | |
1833 | isicom_normal->init_termios = tty_std_termios; | |
1834 | isicom_normal->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | | |
1835 | CLOCAL; | |
938a7023 | 1836 | isicom_normal->flags = TTY_DRIVER_REAL_RAW | |
6d889724 | 1837 | TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_HARDWARE_BREAK; |
09a4a112 JS |
1838 | tty_set_operations(isicom_normal, &isicom_ops); |
1839 | ||
1840 | retval = tty_register_driver(isicom_normal); | |
1841 | if (retval) { | |
1842 | pr_dbg("Couldn't register the dialin driver\n"); | |
1843 | goto err_puttty; | |
1844 | } | |
1da177e4 | 1845 | |
9ac0948b | 1846 | retval = pci_register_driver(&isicom_driver); |
1da177e4 | 1847 | if (retval < 0) { |
9ac0948b | 1848 | printk(KERN_ERR "ISICOM: Unable to register pci driver.\n"); |
09a4a112 | 1849 | goto err_unrtty; |
1da177e4 | 1850 | } |
d8d16e47 | 1851 | |
34b55b86 | 1852 | mod_timer(&tx, jiffies + 1); |
d8d16e47 | 1853 | |
1da177e4 | 1854 | return 0; |
09a4a112 JS |
1855 | err_unrtty: |
1856 | tty_unregister_driver(isicom_normal); | |
1857 | err_puttty: | |
1858 | put_tty_driver(isicom_normal); | |
9ac0948b JS |
1859 | error: |
1860 | return retval; | |
1da177e4 LT |
1861 | } |
1862 | ||
1863 | static void __exit isicom_exit(void) | |
1864 | { | |
e327325f | 1865 | del_timer_sync(&tx); |
aaa246ea | 1866 | |
9ac0948b | 1867 | pci_unregister_driver(&isicom_driver); |
09a4a112 JS |
1868 | tty_unregister_driver(isicom_normal); |
1869 | put_tty_driver(isicom_normal); | |
1da177e4 LT |
1870 | } |
1871 | ||
ca262005 | 1872 | module_init(isicom_init); |
1da177e4 | 1873 | module_exit(isicom_exit); |
aaa246ea JS |
1874 | |
1875 | MODULE_AUTHOR("MultiTech"); | |
1876 | MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech"); | |
1877 | MODULE_LICENSE("GPL"); |