Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * This program is free software; you can redistribute it and/or | |
3 | * modify it under the terms of the GNU General Public License | |
4 | * as published by the Free Software Foundation; either version | |
5 | * 2 of the License, or (at your option) any later version. | |
6 | * | |
7 | * Original driver code supplied by Multi-Tech | |
8 | * | |
9 | * Changes | |
10 | * 1/9/98 alan@redhat.com Merge to 2.0.x kernel tree | |
11 | * Obtain and use official major/minors | |
12 | * Loader switched to a misc device | |
13 | * (fixed range check bug as a side effect) | |
14 | * Printk clean up | |
15 | * 9/12/98 alan@redhat.com Rough port to 2.1.x | |
16 | * | |
17 | * 10/6/99 sameer Merged the ISA and PCI drivers to | |
18 | * a new unified driver. | |
19 | * | |
20 | * 3/9/99 sameer Added support for ISI4616 cards. | |
21 | * | |
22 | * 16/9/99 sameer We do not force RTS low anymore. | |
d8d16e47 | 23 | * This is to prevent the firmware |
1da177e4 LT |
24 | * from getting confused. |
25 | * | |
26 | * 26/10/99 sameer Cosmetic changes:The driver now | |
27 | * dumps the Port Count information | |
28 | * along with I/O address and IRQ. | |
29 | * | |
30 | * 13/12/99 sameer Fixed the problem with IRQ sharing. | |
31 | * | |
32 | * 10/5/00 sameer Fixed isicom_shutdown_board() | |
33 | * to not lower DTR on all the ports | |
d8d16e47 | 34 | * when the last port on the card is |
1da177e4 LT |
35 | * closed. |
36 | * | |
37 | * 10/5/00 sameer Signal mask setup command added | |
d8d16e47 | 38 | * to isicom_setup_port and |
1da177e4 LT |
39 | * isicom_shutdown_port. |
40 | * | |
41 | * 24/5/00 sameer The driver is now SMP aware. | |
d8d16e47 JS |
42 | * |
43 | * | |
1da177e4 | 44 | * 27/11/00 Vinayak P Risbud Fixed the Driver Crash Problem |
d8d16e47 JS |
45 | * |
46 | * | |
1da177e4 LT |
47 | * 03/01/01 anil .s Added support for resetting the |
48 | * internal modems on ISI cards. | |
49 | * | |
50 | * 08/02/01 anil .s Upgraded the driver for kernel | |
51 | * 2.4.x | |
52 | * | |
d8d16e47 | 53 | * 11/04/01 Kevin Fixed firmware load problem with |
1da177e4 | 54 | * ISIHP-4X card |
d8d16e47 | 55 | * |
1da177e4 LT |
56 | * 30/04/01 anil .s Fixed the remote login through |
57 | * ISI port problem. Now the link | |
58 | * does not go down before password | |
59 | * prompt. | |
60 | * | |
61 | * 03/05/01 anil .s Fixed the problem with IRQ sharing | |
62 | * among ISI-PCI cards. | |
63 | * | |
64 | * 03/05/01 anil .s Added support to display the version | |
d8d16e47 | 65 | * info during insmod as well as module |
1da177e4 | 66 | * listing by lsmod. |
d8d16e47 | 67 | * |
1da177e4 LT |
68 | * 10/05/01 anil .s Done the modifications to the source |
69 | * file and Install script so that the | |
70 | * same installation can be used for | |
71 | * 2.2.x and 2.4.x kernel. | |
72 | * | |
73 | * 06/06/01 anil .s Now we drop both dtr and rts during | |
74 | * shutdown_port as well as raise them | |
75 | * during isicom_config_port. | |
d8d16e47 | 76 | * |
1da177e4 LT |
77 | * 09/06/01 acme@conectiva.com.br use capable, not suser, do |
78 | * restore_flags on failure in | |
79 | * isicom_send_break, verify put_user | |
80 | * result | |
81 | * | |
d8d16e47 JS |
82 | * 11/02/03 ranjeeth Added support for 230 Kbps and 460 Kbps |
83 | * Baud index extended to 21 | |
84 | * | |
85 | * 20/03/03 ranjeeth Made to work for Linux Advanced server. | |
86 | * Taken care of license warning. | |
87 | * | |
88 | * 10/12/03 Ravindra Made to work for Fedora Core 1 of | |
1da177e4 LT |
89 | * Red Hat Distribution |
90 | * | |
91 | * 06/01/05 Alan Cox Merged the ISI and base kernel strands | |
92 | * into a single 2.6 driver | |
93 | * | |
94 | * *********************************************************** | |
95 | * | |
d8d16e47 | 96 | * To use this driver you also need the support package. You |
1da177e4 LT |
97 | * can find this in RPM format on |
98 | * ftp://ftp.linux.org.uk/pub/linux/alan | |
d8d16e47 | 99 | * |
1da177e4 LT |
100 | * You can find the original tools for this direct from Multitech |
101 | * ftp://ftp.multitech.com/ISI-Cards/ | |
102 | * | |
103 | * Having installed the cards the module options (/etc/modprobe.conf) | |
104 | * | |
105 | * options isicom io=card1,card2,card3,card4 irq=card1,card2,card3,card4 | |
106 | * | |
107 | * Omit those entries for boards you don't have installed. | |
108 | * | |
109 | * TODO | |
1da177e4 LT |
110 | * Merge testing |
111 | * 64-bit verification | |
112 | */ | |
113 | ||
114 | #include <linux/module.h> | |
e65c1db1 | 115 | #include <linux/firmware.h> |
1da177e4 LT |
116 | #include <linux/kernel.h> |
117 | #include <linux/tty.h> | |
33f0f88f | 118 | #include <linux/tty_flip.h> |
1da177e4 LT |
119 | #include <linux/termios.h> |
120 | #include <linux/fs.h> | |
121 | #include <linux/sched.h> | |
122 | #include <linux/serial.h> | |
123 | #include <linux/mm.h> | |
1da177e4 LT |
124 | #include <linux/interrupt.h> |
125 | #include <linux/timer.h> | |
126 | #include <linux/delay.h> | |
127 | #include <linux/ioport.h> | |
128 | ||
129 | #include <asm/uaccess.h> | |
130 | #include <asm/io.h> | |
131 | #include <asm/system.h> | |
132 | ||
133 | #include <linux/pci.h> | |
134 | ||
135 | #include <linux/isicom.h> | |
136 | ||
aaa246ea JS |
137 | #define InterruptTheCard(base) outw(0, (base) + 0xc) |
138 | #define ClearInterrupt(base) inw((base) + 0x0a) | |
139 | ||
73b52572 | 140 | #define pr_dbg(str...) pr_debug("ISICOM: " str) |
aaa246ea | 141 | #ifdef DEBUG |
aaa246ea JS |
142 | #define isicom_paranoia_check(a, b, c) __isicom_paranoia_check((a), (b), (c)) |
143 | #else | |
aaa246ea JS |
144 | #define isicom_paranoia_check(a, b, c) 0 |
145 | #endif | |
146 | ||
9ac0948b JS |
147 | static int isicom_probe(struct pci_dev *, const struct pci_device_id *); |
148 | static void __devexit isicom_remove(struct pci_dev *); | |
149 | ||
1da177e4 | 150 | static struct pci_device_id isicom_pci_tbl[] = { |
9ac0948b JS |
151 | { PCI_DEVICE(VENDOR_ID, 0x2028) }, |
152 | { PCI_DEVICE(VENDOR_ID, 0x2051) }, | |
153 | { PCI_DEVICE(VENDOR_ID, 0x2052) }, | |
154 | { PCI_DEVICE(VENDOR_ID, 0x2053) }, | |
155 | { PCI_DEVICE(VENDOR_ID, 0x2054) }, | |
156 | { PCI_DEVICE(VENDOR_ID, 0x2055) }, | |
157 | { PCI_DEVICE(VENDOR_ID, 0x2056) }, | |
158 | { PCI_DEVICE(VENDOR_ID, 0x2057) }, | |
159 | { PCI_DEVICE(VENDOR_ID, 0x2058) }, | |
1da177e4 LT |
160 | { 0 } |
161 | }; | |
162 | MODULE_DEVICE_TABLE(pci, isicom_pci_tbl); | |
163 | ||
9ac0948b JS |
164 | static struct pci_driver isicom_driver = { |
165 | .name = "isicom", | |
166 | .id_table = isicom_pci_tbl, | |
167 | .probe = isicom_probe, | |
168 | .remove = __devexit_p(isicom_remove) | |
169 | }; | |
170 | ||
1da177e4 LT |
171 | static int prev_card = 3; /* start servicing isi_card[0] */ |
172 | static struct tty_driver *isicom_normal; | |
173 | ||
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 LT |
191 | unsigned short shift_count; |
192 | struct isi_port * ports; | |
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; | |
201 | unsigned int flags; | |
202 | int count; | |
203 | int blocked_open; | |
204 | int close_delay; | |
8070e35c JS |
205 | u16 channel; |
206 | u16 status; | |
207 | u16 closing_wait; | |
1da177e4 LT |
208 | struct isi_board * card; |
209 | struct tty_struct * tty; | |
210 | wait_queue_head_t close_wait; | |
211 | wait_queue_head_t open_wait; | |
1da177e4 LT |
212 | unsigned char * xmit_buf; |
213 | int xmit_head; | |
214 | int xmit_tail; | |
215 | int xmit_cnt; | |
216 | }; | |
217 | ||
218 | static struct isi_board isi_card[BOARD_COUNT]; | |
219 | static struct isi_port isi_ports[PORT_COUNT]; | |
220 | ||
221 | /* | |
222 | * Locking functions for card level locking. We need to own both | |
223 | * the kernel lock for the card and have the card in a position that | |
224 | * it wants to talk. | |
225 | */ | |
d8d16e47 | 226 | |
4969b3a4 | 227 | static inline int WaitTillCardIsFree(unsigned long base) |
cfe7c09a JS |
228 | { |
229 | unsigned int count = 0; | |
230 | unsigned int a = in_atomic(); /* do we run under spinlock? */ | |
231 | ||
232 | while (!(inw(base + 0xe) & 0x1) && count++ < 100) | |
233 | if (a) | |
234 | mdelay(1); | |
235 | else | |
236 | msleep(1); | |
237 | ||
238 | return !(inw(base + 0xe) & 0x1); | |
239 | } | |
240 | ||
1da177e4 LT |
241 | static int lock_card(struct isi_board *card) |
242 | { | |
8070e35c | 243 | unsigned long base = card->base; |
5b21f9dd | 244 | unsigned int retries, a; |
1da177e4 | 245 | |
5b21f9dd | 246 | for (retries = 0; retries < 10; retries++) { |
1da177e4 | 247 | spin_lock_irqsave(&card->card_lock, card->flags); |
5b21f9dd JS |
248 | for (a = 0; a < 10; a++) { |
249 | if (inw(base + 0xe) & 0x1) | |
250 | return 1; | |
251 | udelay(10); | |
1da177e4 | 252 | } |
5b21f9dd JS |
253 | spin_unlock_irqrestore(&card->card_lock, card->flags); |
254 | msleep(10); | |
1da177e4 | 255 | } |
a547dfe9 JS |
256 | printk(KERN_WARNING "ISICOM: Failed to lock Card (0x%lx)\n", |
257 | card->base); | |
258 | ||
0418726b | 259 | return 0; /* Failed to acquire the card! */ |
1da177e4 LT |
260 | } |
261 | ||
1da177e4 LT |
262 | static void unlock_card(struct isi_board *card) |
263 | { | |
264 | spin_unlock_irqrestore(&card->card_lock, card->flags); | |
265 | } | |
266 | ||
267 | /* | |
268 | * ISI Card specific ops ... | |
269 | */ | |
d8d16e47 | 270 | |
cfe7c09a | 271 | /* card->lock HAS to be held */ |
d8d16e47 | 272 | static void raise_dtr(struct isi_port *port) |
1da177e4 | 273 | { |
d8d16e47 | 274 | struct isi_board *card = port->card; |
8070e35c JS |
275 | unsigned long base = card->base; |
276 | u16 channel = port->channel; | |
1da177e4 | 277 | |
cfe7c09a | 278 | if (WaitTillCardIsFree(base)) |
1da177e4 LT |
279 | return; |
280 | ||
d8d16e47 | 281 | outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
1da177e4 LT |
282 | outw(0x0504, base); |
283 | InterruptTheCard(base); | |
284 | port->status |= ISI_DTR; | |
1da177e4 LT |
285 | } |
286 | ||
cfe7c09a | 287 | /* card->lock HAS to be held */ |
d8d16e47 JS |
288 | static inline void drop_dtr(struct isi_port *port) |
289 | { | |
290 | struct isi_board *card = port->card; | |
8070e35c JS |
291 | unsigned long base = card->base; |
292 | u16 channel = port->channel; | |
1da177e4 | 293 | |
cfe7c09a | 294 | if (WaitTillCardIsFree(base)) |
1da177e4 LT |
295 | return; |
296 | ||
d8d16e47 | 297 | outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
1da177e4 | 298 | outw(0x0404, base); |
d8d16e47 | 299 | InterruptTheCard(base); |
1da177e4 | 300 | port->status &= ~ISI_DTR; |
1da177e4 LT |
301 | } |
302 | ||
cfe7c09a | 303 | /* card->lock HAS to be held */ |
d8d16e47 | 304 | static inline void raise_rts(struct isi_port *port) |
1da177e4 | 305 | { |
d8d16e47 | 306 | struct isi_board *card = port->card; |
8070e35c JS |
307 | unsigned long base = card->base; |
308 | u16 channel = port->channel; | |
1da177e4 | 309 | |
cfe7c09a | 310 | if (WaitTillCardIsFree(base)) |
1da177e4 LT |
311 | return; |
312 | ||
d8d16e47 | 313 | outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
1da177e4 | 314 | outw(0x0a04, base); |
d8d16e47 | 315 | InterruptTheCard(base); |
1da177e4 | 316 | port->status |= ISI_RTS; |
1da177e4 | 317 | } |
cfe7c09a JS |
318 | |
319 | /* card->lock HAS to be held */ | |
d8d16e47 | 320 | static inline void drop_rts(struct isi_port *port) |
1da177e4 | 321 | { |
d8d16e47 | 322 | struct isi_board *card = port->card; |
8070e35c JS |
323 | unsigned long base = card->base; |
324 | u16 channel = port->channel; | |
1da177e4 | 325 | |
cfe7c09a | 326 | if (WaitTillCardIsFree(base)) |
1da177e4 LT |
327 | return; |
328 | ||
d8d16e47 | 329 | outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
1da177e4 | 330 | outw(0x0804, base); |
d8d16e47 | 331 | InterruptTheCard(base); |
1da177e4 | 332 | port->status &= ~ISI_RTS; |
1da177e4 LT |
333 | } |
334 | ||
cfe7c09a | 335 | /* card->lock MUST NOT be held */ |
d8d16e47 | 336 | static inline void raise_dtr_rts(struct isi_port *port) |
1da177e4 | 337 | { |
d8d16e47 | 338 | struct isi_board *card = port->card; |
8070e35c JS |
339 | unsigned long base = card->base; |
340 | u16 channel = port->channel; | |
1da177e4 LT |
341 | |
342 | if (!lock_card(card)) | |
343 | return; | |
344 | ||
d8d16e47 | 345 | outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
1da177e4 LT |
346 | outw(0x0f04, base); |
347 | InterruptTheCard(base); | |
348 | port->status |= (ISI_DTR | ISI_RTS); | |
349 | unlock_card(card); | |
350 | } | |
351 | ||
cfe7c09a | 352 | /* card->lock HAS to be held */ |
d8d16e47 | 353 | static void drop_dtr_rts(struct isi_port *port) |
1da177e4 | 354 | { |
d8d16e47 | 355 | struct isi_board *card = port->card; |
8070e35c JS |
356 | unsigned long base = card->base; |
357 | u16 channel = port->channel; | |
1da177e4 | 358 | |
cfe7c09a | 359 | if (WaitTillCardIsFree(base)) |
1da177e4 LT |
360 | return; |
361 | ||
d8d16e47 | 362 | outw(0x8000 | (channel << card->shift_count) | 0x02, base); |
1da177e4 | 363 | outw(0x0c04, base); |
d8d16e47 | 364 | InterruptTheCard(base); |
1da177e4 | 365 | port->status &= ~(ISI_RTS | ISI_DTR); |
1da177e4 LT |
366 | } |
367 | ||
1da177e4 LT |
368 | /* |
369 | * ISICOM Driver specific routines ... | |
370 | * | |
371 | */ | |
d8d16e47 | 372 | |
aaa246ea JS |
373 | static inline int __isicom_paranoia_check(struct isi_port const *port, |
374 | char *name, const char *routine) | |
1da177e4 | 375 | { |
1da177e4 | 376 | if (!port) { |
aaa246ea JS |
377 | printk(KERN_WARNING "ISICOM: Warning: bad isicom magic for " |
378 | "dev %s in %s.\n", name, routine); | |
1da177e4 LT |
379 | return 1; |
380 | } | |
381 | if (port->magic != ISICOM_MAGIC) { | |
aaa246ea JS |
382 | printk(KERN_WARNING "ISICOM: Warning: NULL isicom port for " |
383 | "dev %s in %s.\n", name, routine); | |
1da177e4 | 384 | return 1; |
d8d16e47 | 385 | } |
aaa246ea | 386 | |
1da177e4 LT |
387 | return 0; |
388 | } | |
d8d16e47 | 389 | |
1da177e4 | 390 | /* |
d8d16e47 | 391 | * Transmitter. |
1da177e4 LT |
392 | * |
393 | * We shovel data into the card buffers on a regular basis. The card | |
394 | * will do the rest of the work for us. | |
395 | */ | |
396 | ||
397 | static void isicom_tx(unsigned long _data) | |
398 | { | |
4969b3a4 | 399 | unsigned long flags, base; |
5b21f9dd | 400 | unsigned int retries; |
4969b3a4 | 401 | short count = (BOARD_COUNT-1), card; |
1da177e4 | 402 | short txcount, wrd, residue, word_count, cnt; |
d8d16e47 JS |
403 | struct isi_port *port; |
404 | struct tty_struct *tty; | |
405 | ||
1da177e4 LT |
406 | /* find next active board */ |
407 | card = (prev_card + 1) & 0x0003; | |
408 | while(count-- > 0) { | |
d8d16e47 | 409 | if (isi_card[card].status & BOARD_ACTIVE) |
1da177e4 | 410 | break; |
d8d16e47 | 411 | card = (card + 1) & 0x0003; |
1da177e4 LT |
412 | } |
413 | if (!(isi_card[card].status & BOARD_ACTIVE)) | |
414 | goto sched_again; | |
d8d16e47 | 415 | |
1da177e4 | 416 | prev_card = card; |
d8d16e47 | 417 | |
1da177e4 LT |
418 | count = isi_card[card].port_count; |
419 | port = isi_card[card].ports; | |
420 | base = isi_card[card].base; | |
5b21f9dd JS |
421 | |
422 | spin_lock_irqsave(&isi_card[card].card_lock, flags); | |
423 | for (retries = 0; retries < 100; retries++) { | |
424 | if (inw(base + 0xe) & 0x1) | |
425 | break; | |
426 | udelay(2); | |
427 | } | |
428 | if (retries >= 100) | |
429 | goto unlock; | |
430 | ||
1da177e4 | 431 | for (;count > 0;count--, port++) { |
1da177e4 LT |
432 | /* port not active or tx disabled to force flow control */ |
433 | if (!(port->flags & ASYNC_INITIALIZED) || | |
d8d16e47 | 434 | !(port->status & ISI_TXOK)) |
1da177e4 | 435 | continue; |
d8d16e47 | 436 | |
1da177e4 | 437 | tty = port->tty; |
d8d16e47 | 438 | |
5b21f9dd | 439 | if (tty == NULL) |
1da177e4 | 440 | continue; |
d8d16e47 | 441 | |
1da177e4 | 442 | txcount = min_t(short, TX_SIZE, port->xmit_cnt); |
5b21f9dd | 443 | if (txcount <= 0 || tty->stopped || tty->hw_stopped) |
1da177e4 | 444 | continue; |
5b21f9dd JS |
445 | |
446 | if (!(inw(base + 0x02) & (1 << port->channel))) | |
d8d16e47 | 447 | continue; |
5b21f9dd | 448 | |
aaa246ea JS |
449 | pr_dbg("txing %d bytes, port%d.\n", txcount, |
450 | port->channel + 1); | |
451 | outw((port->channel << isi_card[card].shift_count) | txcount, | |
452 | base); | |
1da177e4 | 453 | residue = NO; |
d8d16e47 | 454 | wrd = 0; |
1da177e4 | 455 | while (1) { |
a547dfe9 JS |
456 | cnt = min_t(int, txcount, (SERIAL_XMIT_SIZE |
457 | - port->xmit_tail)); | |
1da177e4 LT |
458 | if (residue == YES) { |
459 | residue = NO; | |
460 | if (cnt > 0) { | |
a547dfe9 JS |
461 | wrd |= (port->xmit_buf[port->xmit_tail] |
462 | << 8); | |
463 | port->xmit_tail = (port->xmit_tail + 1) | |
464 | & (SERIAL_XMIT_SIZE - 1); | |
1da177e4 LT |
465 | port->xmit_cnt--; |
466 | txcount--; | |
467 | cnt--; | |
d8d16e47 | 468 | outw(wrd, base); |
a547dfe9 | 469 | } else { |
1da177e4 LT |
470 | outw(wrd, base); |
471 | break; | |
472 | } | |
d8d16e47 | 473 | } |
1da177e4 LT |
474 | if (cnt <= 0) break; |
475 | word_count = cnt >> 1; | |
a547dfe9 JS |
476 | outsw(base, port->xmit_buf+port->xmit_tail,word_count); |
477 | port->xmit_tail = (port->xmit_tail | |
478 | + (word_count << 1)) & (SERIAL_XMIT_SIZE - 1); | |
1da177e4 LT |
479 | txcount -= (word_count << 1); |
480 | port->xmit_cnt -= (word_count << 1); | |
481 | if (cnt & 0x0001) { | |
482 | residue = YES; | |
483 | wrd = port->xmit_buf[port->xmit_tail]; | |
a547dfe9 JS |
484 | port->xmit_tail = (port->xmit_tail + 1) |
485 | & (SERIAL_XMIT_SIZE - 1); | |
1da177e4 LT |
486 | port->xmit_cnt--; |
487 | txcount--; | |
488 | } | |
489 | } | |
490 | ||
491 | InterruptTheCard(base); | |
492 | if (port->xmit_cnt <= 0) | |
493 | port->status &= ~ISI_TXOK; | |
494 | if (port->xmit_cnt <= WAKEUP_CHARS) | |
0aa5de85 | 495 | tty_wakeup(tty); |
d8d16e47 | 496 | } |
1da177e4 | 497 | |
5b21f9dd JS |
498 | unlock: |
499 | spin_unlock_irqrestore(&isi_card[card].card_lock, flags); | |
d8d16e47 JS |
500 | /* schedule another tx for hopefully in about 10ms */ |
501 | sched_again: | |
34b55b86 | 502 | mod_timer(&tx, jiffies + msecs_to_jiffies(10)); |
d8d16e47 JS |
503 | } |
504 | ||
1da177e4 | 505 | /* |
d8d16e47 | 506 | * Main interrupt handler routine |
1da177e4 | 507 | */ |
d8d16e47 | 508 | |
7d12e780 | 509 | static irqreturn_t isicom_interrupt(int irq, void *dev_id) |
1da177e4 | 510 | { |
8070e35c | 511 | struct isi_board *card = dev_id; |
d8d16e47 JS |
512 | struct isi_port *port; |
513 | struct tty_struct *tty; | |
8070e35c JS |
514 | unsigned long base; |
515 | u16 header, word_count, count, channel; | |
1da177e4 | 516 | short byte_count; |
33f0f88f | 517 | unsigned char *rp; |
d8d16e47 | 518 | |
1da177e4 LT |
519 | if (!card || !(card->status & FIRMWARE_LOADED)) |
520 | return IRQ_NONE; | |
d8d16e47 | 521 | |
1da177e4 | 522 | base = card->base; |
cb4a10cc JS |
523 | |
524 | /* did the card interrupt us? */ | |
525 | if (!(inw(base + 0x0e) & 0x02)) | |
526 | return IRQ_NONE; | |
527 | ||
1da177e4 | 528 | spin_lock(&card->card_lock); |
d8d16e47 | 529 | |
18234f88 JS |
530 | /* |
531 | * disable any interrupts from the PCI card and lower the | |
532 | * interrupt line | |
533 | */ | |
534 | outw(0x8000, base+0x04); | |
535 | ClearInterrupt(base); | |
d8d16e47 | 536 | |
1da177e4 LT |
537 | inw(base); /* get the dummy word out */ |
538 | header = inw(base); | |
539 | channel = (header & 0x7800) >> card->shift_count; | |
540 | byte_count = header & 0xff; | |
541 | ||
542 | if (channel + 1 > card->port_count) { | |
a547dfe9 JS |
543 | printk(KERN_WARNING "ISICOM: isicom_interrupt(0x%lx): " |
544 | "%d(channel) > port_count.\n", base, channel+1); | |
18234f88 | 545 | outw(0x0000, base+0x04); /* enable interrupts */ |
1da177e4 | 546 | spin_unlock(&card->card_lock); |
d8d16e47 | 547 | return IRQ_HANDLED; |
1da177e4 LT |
548 | } |
549 | port = card->ports + channel; | |
550 | if (!(port->flags & ASYNC_INITIALIZED)) { | |
18234f88 | 551 | outw(0x0000, base+0x04); /* enable interrupts */ |
174f1307 | 552 | spin_unlock(&card->card_lock); |
1da177e4 | 553 | return IRQ_HANDLED; |
d8d16e47 JS |
554 | } |
555 | ||
1da177e4 LT |
556 | tty = port->tty; |
557 | if (tty == NULL) { | |
558 | word_count = byte_count >> 1; | |
559 | while(byte_count > 1) { | |
560 | inw(base); | |
561 | byte_count -= 2; | |
562 | } | |
563 | if (byte_count & 0x01) | |
564 | inw(base); | |
18234f88 | 565 | outw(0x0000, base+0x04); /* enable interrupts */ |
1da177e4 LT |
566 | spin_unlock(&card->card_lock); |
567 | return IRQ_HANDLED; | |
568 | } | |
d8d16e47 | 569 | |
1da177e4 LT |
570 | if (header & 0x8000) { /* Status Packet */ |
571 | header = inw(base); | |
572 | switch(header & 0xff) { | |
d8d16e47 | 573 | case 0: /* Change in EIA signals */ |
d8d16e47 JS |
574 | if (port->flags & ASYNC_CHECK_CD) { |
575 | if (port->status & ISI_DCD) { | |
576 | if (!(header & ISI_DCD)) { | |
577 | /* Carrier has been lost */ | |
a547dfe9 JS |
578 | pr_dbg("interrupt: DCD->low.\n" |
579 | ); | |
d8d16e47 | 580 | port->status &= ~ISI_DCD; |
0aa5de85 | 581 | tty_hangup(tty); |
1da177e4 | 582 | } |
a547dfe9 JS |
583 | } else if (header & ISI_DCD) { |
584 | /* Carrier has been detected */ | |
585 | pr_dbg("interrupt: DCD->high.\n"); | |
586 | port->status |= ISI_DCD; | |
587 | wake_up_interruptible(&port->open_wait); | |
1da177e4 | 588 | } |
a547dfe9 | 589 | } else { |
d8d16e47 JS |
590 | if (header & ISI_DCD) |
591 | port->status |= ISI_DCD; | |
592 | else | |
593 | port->status &= ~ISI_DCD; | |
594 | } | |
595 | ||
596 | if (port->flags & ASYNC_CTS_FLOW) { | |
597 | if (port->tty->hw_stopped) { | |
598 | if (header & ISI_CTS) { | |
599 | port->tty->hw_stopped = 0; | |
600 | /* start tx ing */ | |
a547dfe9 JS |
601 | port->status |= (ISI_TXOK |
602 | | ISI_CTS); | |
0aa5de85 | 603 | tty_wakeup(tty); |
1da177e4 | 604 | } |
a547dfe9 JS |
605 | } else if (!(header & ISI_CTS)) { |
606 | port->tty->hw_stopped = 1; | |
607 | /* stop tx ing */ | |
608 | port->status &= ~(ISI_TXOK | ISI_CTS); | |
1da177e4 | 609 | } |
a547dfe9 | 610 | } else { |
d8d16e47 JS |
611 | if (header & ISI_CTS) |
612 | port->status |= ISI_CTS; | |
1da177e4 | 613 | else |
d8d16e47 JS |
614 | port->status &= ~ISI_CTS; |
615 | } | |
616 | ||
617 | if (header & ISI_DSR) | |
618 | port->status |= ISI_DSR; | |
619 | else | |
620 | port->status &= ~ISI_DSR; | |
621 | ||
622 | if (header & ISI_RI) | |
623 | port->status |= ISI_RI; | |
624 | else | |
625 | port->status &= ~ISI_RI; | |
626 | ||
627 | break; | |
628 | ||
a547dfe9 | 629 | case 1: /* Received Break !!! */ |
d8d16e47 JS |
630 | tty_insert_flip_char(tty, 0, TTY_BREAK); |
631 | if (port->flags & ASYNC_SAK) | |
632 | do_SAK(tty); | |
633 | tty_flip_buffer_push(tty); | |
634 | break; | |
635 | ||
636 | case 2: /* Statistics */ | |
aaa246ea | 637 | pr_dbg("isicom_interrupt: stats!!!.\n"); |
d8d16e47 JS |
638 | break; |
639 | ||
640 | default: | |
aaa246ea | 641 | pr_dbg("Intr: Unknown code in status packet.\n"); |
d8d16e47 JS |
642 | break; |
643 | } | |
a547dfe9 | 644 | } else { /* Data Packet */ |
33f0f88f AC |
645 | |
646 | count = tty_prepare_flip_string(tty, &rp, byte_count & ~1); | |
aaa246ea | 647 | pr_dbg("Intr: Can rx %d of %d bytes.\n", count, byte_count); |
1da177e4 | 648 | word_count = count >> 1; |
33f0f88f | 649 | insw(base, rp, word_count); |
1da177e4 LT |
650 | byte_count -= (word_count << 1); |
651 | if (count & 0x0001) { | |
a547dfe9 JS |
652 | tty_insert_flip_char(tty, inw(base) & 0xff, |
653 | TTY_NORMAL); | |
1da177e4 | 654 | byte_count -= 2; |
d8d16e47 | 655 | } |
1da177e4 | 656 | if (byte_count > 0) { |
aaa246ea JS |
657 | pr_dbg("Intr(0x%lx:%d): Flip buffer overflow! dropping " |
658 | "bytes...\n", base, channel + 1); | |
1da177e4 LT |
659 | while(byte_count > 0) { /* drain out unread xtra data */ |
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); |
a547dfe9 | 668 | |
1da177e4 | 669 | return IRQ_HANDLED; |
d8d16e47 | 670 | } |
1da177e4 | 671 | |
d8d16e47 | 672 | static void isicom_config_port(struct isi_port *port) |
1da177e4 | 673 | { |
d8d16e47 JS |
674 | struct isi_board *card = port->card; |
675 | struct tty_struct *tty; | |
1da177e4 | 676 | unsigned long baud; |
8070e35c JS |
677 | unsigned long base = card->base; |
678 | u16 channel_setup, channel = port->channel, | |
679 | shift_count = card->shift_count; | |
1da177e4 | 680 | unsigned char flow_ctrl; |
d8d16e47 | 681 | |
1da177e4 LT |
682 | if (!(tty = port->tty) || !tty->termios) |
683 | return; | |
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) | |
1da177e4 LT |
695 | port->tty->termios->c_cflag &= ~CBAUDEX; |
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 | ||
1da177e4 | 706 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) |
d8d16e47 | 707 | baud++; /* 57.6 Kbps */ |
1da177e4 | 708 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) |
d8d16e47 | 709 | baud +=2; /* 115 Kbps */ |
7edc136a JS |
710 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) |
711 | baud += 3; /* 230 kbps*/ | |
712 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) | |
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; | |
719 | } | |
720 | else | |
1da177e4 | 721 | raise_dtr(port); |
d8d16e47 | 722 | |
cfe7c09a | 723 | if (WaitTillCardIsFree(base) == 0) { |
1da177e4 LT |
724 | outw(0x8000 | (channel << shift_count) |0x03, base); |
725 | outw(linuxb_to_isib[baud] << 8 | 0x03, base); | |
726 | channel_setup = 0; | |
727 | switch(C_CSIZE(tty)) { | |
d8d16e47 JS |
728 | case CS5: |
729 | channel_setup |= ISICOM_CS5; | |
730 | break; | |
731 | case CS6: | |
732 | channel_setup |= ISICOM_CS6; | |
733 | break; | |
734 | case CS7: | |
735 | channel_setup |= ISICOM_CS7; | |
736 | break; | |
737 | case CS8: | |
738 | channel_setup |= ISICOM_CS8; | |
739 | break; | |
1da177e4 | 740 | } |
d8d16e47 | 741 | |
1da177e4 LT |
742 | if (C_CSTOPB(tty)) |
743 | channel_setup |= ISICOM_2SB; | |
744 | if (C_PARENB(tty)) { | |
745 | channel_setup |= ISICOM_EVPAR; | |
746 | if (C_PARODD(tty)) | |
d8d16e47 | 747 | channel_setup |= ISICOM_ODPAR; |
1da177e4 | 748 | } |
d8d16e47 | 749 | outw(channel_setup, base); |
1da177e4 | 750 | InterruptTheCard(base); |
d8d16e47 | 751 | } |
1da177e4 LT |
752 | if (C_CLOCAL(tty)) |
753 | port->flags &= ~ASYNC_CHECK_CD; | |
754 | else | |
d8d16e47 JS |
755 | port->flags |= ASYNC_CHECK_CD; |
756 | ||
1da177e4 LT |
757 | /* flow control settings ...*/ |
758 | flow_ctrl = 0; | |
759 | port->flags &= ~ASYNC_CTS_FLOW; | |
760 | if (C_CRTSCTS(tty)) { | |
761 | port->flags |= ASYNC_CTS_FLOW; | |
762 | flow_ctrl |= ISICOM_CTSRTS; | |
d8d16e47 JS |
763 | } |
764 | if (I_IXON(tty)) | |
1da177e4 LT |
765 | flow_ctrl |= ISICOM_RESPOND_XONXOFF; |
766 | if (I_IXOFF(tty)) | |
d8d16e47 JS |
767 | flow_ctrl |= ISICOM_INITIATE_XONXOFF; |
768 | ||
cfe7c09a | 769 | if (WaitTillCardIsFree(base) == 0) { |
1da177e4 LT |
770 | outw(0x8000 | (channel << shift_count) |0x04, base); |
771 | outw(flow_ctrl << 8 | 0x05, base); | |
772 | outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base); | |
773 | InterruptTheCard(base); | |
1da177e4 | 774 | } |
d8d16e47 | 775 | |
1da177e4 LT |
776 | /* rx enabled -> enable port for rx on the card */ |
777 | if (C_CREAD(tty)) { | |
778 | card->port_status |= (1 << channel); | |
779 | outw(card->port_status, base + 0x02); | |
780 | } | |
781 | } | |
1da177e4 | 782 | |
d8d16e47 JS |
783 | /* open et all */ |
784 | ||
785 | static inline void isicom_setup_board(struct isi_board *bp) | |
1da177e4 LT |
786 | { |
787 | int channel; | |
d8d16e47 | 788 | struct isi_port *port; |
1da177e4 | 789 | unsigned long flags; |
d8d16e47 | 790 | |
1da177e4 LT |
791 | spin_lock_irqsave(&bp->card_lock, flags); |
792 | if (bp->status & BOARD_ACTIVE) { | |
793 | spin_unlock_irqrestore(&bp->card_lock, flags); | |
794 | return; | |
795 | } | |
796 | port = bp->ports; | |
797 | bp->status |= BOARD_ACTIVE; | |
d8d16e47 | 798 | for (channel = 0; channel < bp->port_count; channel++, port++) |
1da177e4 | 799 | drop_dtr_rts(port); |
cfe7c09a | 800 | spin_unlock_irqrestore(&bp->card_lock, flags); |
1da177e4 | 801 | } |
d8d16e47 JS |
802 | |
803 | static int isicom_setup_port(struct isi_port *port) | |
1da177e4 | 804 | { |
d8d16e47 | 805 | struct isi_board *card = port->card; |
1da177e4 | 806 | unsigned long flags; |
d8d16e47 | 807 | |
1da177e4 LT |
808 | if (port->flags & ASYNC_INITIALIZED) { |
809 | return 0; | |
810 | } | |
811 | if (!port->xmit_buf) { | |
812 | unsigned long page; | |
d8d16e47 | 813 | |
1da177e4 LT |
814 | if (!(page = get_zeroed_page(GFP_KERNEL))) |
815 | return -ENOMEM; | |
d8d16e47 | 816 | |
1da177e4 LT |
817 | if (port->xmit_buf) { |
818 | free_page(page); | |
819 | return -ERESTARTSYS; | |
820 | } | |
d8d16e47 JS |
821 | port->xmit_buf = (unsigned char *) page; |
822 | } | |
1da177e4 LT |
823 | |
824 | spin_lock_irqsave(&card->card_lock, flags); | |
825 | if (port->tty) | |
826 | clear_bit(TTY_IO_ERROR, &port->tty->flags); | |
827 | if (port->count == 1) | |
828 | card->count++; | |
d8d16e47 | 829 | |
1da177e4 | 830 | port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; |
d8d16e47 | 831 | |
1da177e4 | 832 | /* discard any residual data */ |
cfe7c09a JS |
833 | if (WaitTillCardIsFree(card->base) == 0) { |
834 | outw(0x8000 | (port->channel << card->shift_count) | 0x02, | |
835 | card->base); | |
836 | outw(((ISICOM_KILLTX | ISICOM_KILLRX) << 8) | 0x06, card->base); | |
837 | InterruptTheCard(card->base); | |
838 | } | |
d8d16e47 | 839 | |
1da177e4 LT |
840 | isicom_config_port(port); |
841 | port->flags |= ASYNC_INITIALIZED; | |
842 | spin_unlock_irqrestore(&card->card_lock, flags); | |
d8d16e47 JS |
843 | |
844 | return 0; | |
845 | } | |
846 | ||
a547dfe9 JS |
847 | static int block_til_ready(struct tty_struct *tty, struct file *filp, |
848 | struct isi_port *port) | |
1da177e4 | 849 | { |
d8d16e47 | 850 | struct isi_board *card = port->card; |
1da177e4 LT |
851 | int do_clocal = 0, retval; |
852 | unsigned long flags; | |
853 | DECLARE_WAITQUEUE(wait, current); | |
854 | ||
855 | /* block if port is in the process of being closed */ | |
856 | ||
857 | if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) { | |
aaa246ea | 858 | pr_dbg("block_til_ready: close in progress.\n"); |
1da177e4 LT |
859 | interruptible_sleep_on(&port->close_wait); |
860 | if (port->flags & ASYNC_HUP_NOTIFY) | |
861 | return -EAGAIN; | |
862 | else | |
863 | return -ERESTARTSYS; | |
864 | } | |
d8d16e47 | 865 | |
1da177e4 | 866 | /* if non-blocking mode is set ... */ |
d8d16e47 | 867 | |
a547dfe9 JS |
868 | if ((filp->f_flags & O_NONBLOCK) || |
869 | (tty->flags & (1 << TTY_IO_ERROR))) { | |
aaa246ea | 870 | pr_dbg("block_til_ready: non-block mode.\n"); |
1da177e4 | 871 | port->flags |= ASYNC_NORMAL_ACTIVE; |
d8d16e47 JS |
872 | return 0; |
873 | } | |
874 | ||
1da177e4 LT |
875 | if (C_CLOCAL(tty)) |
876 | do_clocal = 1; | |
d8d16e47 JS |
877 | |
878 | /* block waiting for DCD to be asserted, and while | |
1da177e4 LT |
879 | callout dev is busy */ |
880 | retval = 0; | |
881 | add_wait_queue(&port->open_wait, &wait); | |
882 | ||
883 | spin_lock_irqsave(&card->card_lock, flags); | |
884 | if (!tty_hung_up_p(filp)) | |
885 | port->count--; | |
886 | port->blocked_open++; | |
887 | spin_unlock_irqrestore(&card->card_lock, flags); | |
d8d16e47 | 888 | |
1da177e4 LT |
889 | while (1) { |
890 | raise_dtr_rts(port); | |
891 | ||
892 | set_current_state(TASK_INTERRUPTIBLE); | |
d8d16e47 | 893 | if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) { |
1da177e4 LT |
894 | if (port->flags & ASYNC_HUP_NOTIFY) |
895 | retval = -EAGAIN; | |
896 | else | |
897 | retval = -ERESTARTSYS; | |
898 | break; | |
d8d16e47 | 899 | } |
1da177e4 | 900 | if (!(port->flags & ASYNC_CLOSING) && |
d8d16e47 | 901 | (do_clocal || (port->status & ISI_DCD))) { |
1da177e4 | 902 | break; |
d8d16e47 | 903 | } |
1da177e4 LT |
904 | if (signal_pending(current)) { |
905 | retval = -ERESTARTSYS; | |
906 | break; | |
907 | } | |
d8d16e47 | 908 | schedule(); |
1da177e4 LT |
909 | } |
910 | set_current_state(TASK_RUNNING); | |
911 | remove_wait_queue(&port->open_wait, &wait); | |
912 | spin_lock_irqsave(&card->card_lock, flags); | |
913 | if (!tty_hung_up_p(filp)) | |
914 | port->count++; | |
915 | port->blocked_open--; | |
916 | spin_unlock_irqrestore(&card->card_lock, flags); | |
917 | if (retval) | |
918 | return retval; | |
919 | port->flags |= ASYNC_NORMAL_ACTIVE; | |
920 | return 0; | |
921 | } | |
d8d16e47 JS |
922 | |
923 | static int isicom_open(struct tty_struct *tty, struct file *filp) | |
1da177e4 | 924 | { |
d8d16e47 JS |
925 | struct isi_port *port; |
926 | struct isi_board *card; | |
17c4edf0 JS |
927 | unsigned int board; |
928 | int error, line; | |
1da177e4 LT |
929 | |
930 | line = tty->index; | |
931 | if (line < 0 || line > PORT_COUNT-1) | |
932 | return -ENODEV; | |
933 | board = BOARD(line); | |
934 | card = &isi_card[board]; | |
d8d16e47 | 935 | |
1da177e4 LT |
936 | if (!(card->status & FIRMWARE_LOADED)) |
937 | return -ENODEV; | |
d8d16e47 | 938 | |
1da177e4 LT |
939 | /* open on a port greater than the port count for the card !!! */ |
940 | if (line > ((board * 16) + card->port_count - 1)) | |
941 | return -ENODEV; | |
942 | ||
d8d16e47 | 943 | port = &isi_ports[line]; |
1da177e4 LT |
944 | if (isicom_paranoia_check(port, tty->name, "isicom_open")) |
945 | return -ENODEV; | |
d8d16e47 JS |
946 | |
947 | isicom_setup_board(card); | |
948 | ||
1da177e4 LT |
949 | port->count++; |
950 | tty->driver_data = port; | |
951 | port->tty = tty; | |
952 | if ((error = isicom_setup_port(port))!=0) | |
953 | return error; | |
954 | if ((error = block_til_ready(tty, filp, port))!=0) | |
955 | return error; | |
956 | ||
d8d16e47 | 957 | return 0; |
1da177e4 | 958 | } |
d8d16e47 | 959 | |
1da177e4 LT |
960 | /* close et all */ |
961 | ||
d8d16e47 | 962 | static inline void isicom_shutdown_board(struct isi_board *bp) |
1da177e4 | 963 | { |
1da177e4 LT |
964 | if (bp->status & BOARD_ACTIVE) { |
965 | bp->status &= ~BOARD_ACTIVE; | |
966 | } | |
1da177e4 LT |
967 | } |
968 | ||
cfe7c09a | 969 | /* card->lock HAS to be held */ |
d8d16e47 | 970 | static void isicom_shutdown_port(struct isi_port *port) |
1da177e4 | 971 | { |
d8d16e47 JS |
972 | struct isi_board *card = port->card; |
973 | struct tty_struct *tty; | |
d8d16e47 | 974 | |
1da177e4 LT |
975 | tty = port->tty; |
976 | ||
cfe7c09a | 977 | if (!(port->flags & ASYNC_INITIALIZED)) |
1da177e4 | 978 | return; |
cfe7c09a | 979 | |
1da177e4 LT |
980 | if (port->xmit_buf) { |
981 | free_page((unsigned long) port->xmit_buf); | |
982 | port->xmit_buf = NULL; | |
d8d16e47 | 983 | } |
1da177e4 LT |
984 | port->flags &= ~ASYNC_INITIALIZED; |
985 | /* 3rd October 2000 : Vinayak P Risbud */ | |
986 | port->tty = NULL; | |
d8d16e47 | 987 | |
1da177e4 LT |
988 | /*Fix done by Anil .S on 30-04-2001 |
989 | remote login through isi port has dtr toggle problem | |
990 | due to which the carrier drops before the password prompt | |
d8d16e47 | 991 | appears on the remote end. Now we drop the dtr only if the |
1da177e4 | 992 | HUPCL(Hangup on close) flag is set for the tty*/ |
d8d16e47 JS |
993 | |
994 | if (C_HUPCL(tty)) | |
1da177e4 LT |
995 | /* drop dtr on this port */ |
996 | drop_dtr(port); | |
d8d16e47 JS |
997 | |
998 | /* any other port uninits */ | |
1da177e4 LT |
999 | if (tty) |
1000 | set_bit(TTY_IO_ERROR, &tty->flags); | |
d8d16e47 | 1001 | |
1da177e4 | 1002 | if (--card->count < 0) { |
aaa246ea | 1003 | pr_dbg("isicom_shutdown_port: bad board(0x%lx) count %d.\n", |
1da177e4 | 1004 | card->base, card->count); |
d8d16e47 | 1005 | card->count = 0; |
1da177e4 | 1006 | } |
d8d16e47 | 1007 | |
a547dfe9 | 1008 | /* last port was closed, shutdown that boad too */ |
d8d16e47 | 1009 | if (C_HUPCL(tty)) { |
1da177e4 LT |
1010 | if (!card->count) |
1011 | isicom_shutdown_board(card); | |
1012 | } | |
1013 | } | |
1014 | ||
d8d16e47 | 1015 | static void isicom_close(struct tty_struct *tty, struct file *filp) |
1da177e4 | 1016 | { |
8070e35c | 1017 | struct isi_port *port = tty->driver_data; |
c387fd85 | 1018 | struct isi_board *card; |
1da177e4 | 1019 | unsigned long flags; |
d8d16e47 | 1020 | |
1da177e4 LT |
1021 | if (!port) |
1022 | return; | |
c387fd85 | 1023 | card = port->card; |
1da177e4 LT |
1024 | if (isicom_paranoia_check(port, tty->name, "isicom_close")) |
1025 | return; | |
d8d16e47 | 1026 | |
aaa246ea | 1027 | pr_dbg("Close start!!!.\n"); |
d8d16e47 | 1028 | |
1da177e4 LT |
1029 | spin_lock_irqsave(&card->card_lock, flags); |
1030 | if (tty_hung_up_p(filp)) { | |
1031 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1032 | return; | |
1033 | } | |
d8d16e47 | 1034 | |
1da177e4 | 1035 | if (tty->count == 1 && port->count != 1) { |
a547dfe9 JS |
1036 | printk(KERN_WARNING "ISICOM:(0x%lx) isicom_close: bad port " |
1037 | "count tty->count = 1 port count = %d.\n", | |
1da177e4 LT |
1038 | card->base, port->count); |
1039 | port->count = 1; | |
1040 | } | |
1041 | if (--port->count < 0) { | |
a547dfe9 JS |
1042 | printk(KERN_WARNING "ISICOM:(0x%lx) isicom_close: bad port " |
1043 | "count for channel%d = %d", card->base, port->channel, | |
1da177e4 | 1044 | port->count); |
d8d16e47 | 1045 | port->count = 0; |
1da177e4 | 1046 | } |
d8d16e47 | 1047 | |
1da177e4 LT |
1048 | if (port->count) { |
1049 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1050 | return; | |
d8d16e47 | 1051 | } |
1da177e4 LT |
1052 | port->flags |= ASYNC_CLOSING; |
1053 | tty->closing = 1; | |
1054 | spin_unlock_irqrestore(&card->card_lock, flags); | |
d8d16e47 | 1055 | |
1da177e4 LT |
1056 | if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE) |
1057 | tty_wait_until_sent(tty, port->closing_wait); | |
d8d16e47 | 1058 | /* indicate to the card that no more data can be received |
1da177e4 LT |
1059 | on this port */ |
1060 | spin_lock_irqsave(&card->card_lock, flags); | |
d8d16e47 | 1061 | if (port->flags & ASYNC_INITIALIZED) { |
1da177e4 LT |
1062 | card->port_status &= ~(1 << port->channel); |
1063 | outw(card->port_status, card->base + 0x02); | |
d8d16e47 | 1064 | } |
1da177e4 LT |
1065 | isicom_shutdown_port(port); |
1066 | spin_unlock_irqrestore(&card->card_lock, flags); | |
d8d16e47 | 1067 | |
1da177e4 LT |
1068 | if (tty->driver->flush_buffer) |
1069 | tty->driver->flush_buffer(tty); | |
1070 | tty_ldisc_flush(tty); | |
1071 | ||
1072 | spin_lock_irqsave(&card->card_lock, flags); | |
1073 | tty->closing = 0; | |
1074 | ||
1075 | if (port->blocked_open) { | |
1076 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1077 | if (port->close_delay) { | |
aaa246ea | 1078 | pr_dbg("scheduling until time out.\n"); |
a547dfe9 JS |
1079 | msleep_interruptible( |
1080 | jiffies_to_msecs(port->close_delay)); | |
1da177e4 LT |
1081 | } |
1082 | spin_lock_irqsave(&card->card_lock, flags); | |
1083 | wake_up_interruptible(&port->open_wait); | |
d8d16e47 | 1084 | } |
1da177e4 LT |
1085 | port->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING); |
1086 | wake_up_interruptible(&port->close_wait); | |
1087 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1088 | } | |
1089 | ||
1090 | /* write et all */ | |
d8d16e47 JS |
1091 | static int isicom_write(struct tty_struct *tty, const unsigned char *buf, |
1092 | int count) | |
1da177e4 | 1093 | { |
8070e35c | 1094 | struct isi_port *port = tty->driver_data; |
d8d16e47 | 1095 | struct isi_board *card = port->card; |
1da177e4 LT |
1096 | unsigned long flags; |
1097 | int cnt, total = 0; | |
1098 | ||
1099 | if (isicom_paranoia_check(port, tty->name, "isicom_write")) | |
1100 | return 0; | |
d8d16e47 | 1101 | |
326f28e9 | 1102 | if (!port->xmit_buf) |
1da177e4 | 1103 | return 0; |
d8d16e47 | 1104 | |
1da177e4 | 1105 | spin_lock_irqsave(&card->card_lock, flags); |
d8d16e47 JS |
1106 | |
1107 | while(1) { | |
a547dfe9 JS |
1108 | cnt = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt |
1109 | - 1, SERIAL_XMIT_SIZE - port->xmit_head)); | |
d8d16e47 | 1110 | if (cnt <= 0) |
1da177e4 | 1111 | break; |
d8d16e47 | 1112 | |
1da177e4 | 1113 | memcpy(port->xmit_buf + port->xmit_head, buf, cnt); |
a547dfe9 JS |
1114 | port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE |
1115 | - 1); | |
1da177e4 LT |
1116 | port->xmit_cnt += cnt; |
1117 | buf += cnt; | |
1118 | count -= cnt; | |
1119 | total += cnt; | |
d8d16e47 | 1120 | } |
1da177e4 LT |
1121 | if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped) |
1122 | port->status |= ISI_TXOK; | |
1123 | spin_unlock_irqrestore(&card->card_lock, flags); | |
d8d16e47 | 1124 | return total; |
1da177e4 LT |
1125 | } |
1126 | ||
1127 | /* put_char et all */ | |
d8d16e47 | 1128 | static void isicom_put_char(struct tty_struct *tty, unsigned char ch) |
1da177e4 | 1129 | { |
8070e35c | 1130 | struct isi_port *port = tty->driver_data; |
d8d16e47 | 1131 | struct isi_board *card = port->card; |
1da177e4 | 1132 | unsigned long flags; |
d8d16e47 | 1133 | |
1da177e4 LT |
1134 | if (isicom_paranoia_check(port, tty->name, "isicom_put_char")) |
1135 | return; | |
d8d16e47 | 1136 | |
326f28e9 | 1137 | if (!port->xmit_buf) |
1da177e4 LT |
1138 | return; |
1139 | ||
1140 | spin_lock_irqsave(&card->card_lock, flags); | |
1141 | if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) { | |
1142 | spin_unlock_irqrestore(&card->card_lock, flags); | |
1143 | return; | |
1144 | } | |
d8d16e47 | 1145 | |
1da177e4 LT |
1146 | port->xmit_buf[port->xmit_head++] = ch; |
1147 | port->xmit_head &= (SERIAL_XMIT_SIZE - 1); | |
1148 | port->xmit_cnt++; | |
1149 | spin_unlock_irqrestore(&card->card_lock, flags); | |
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 JS |
1160 | if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped || |
1161 | !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 */ | |
a547dfe9 JS |
1194 | static inline void isicom_send_break(struct isi_port *port, |
1195 | unsigned long length) | |
1da177e4 | 1196 | { |
d8d16e47 | 1197 | struct isi_board *card = port->card; |
8070e35c | 1198 | unsigned long base = card->base; |
d8d16e47 JS |
1199 | |
1200 | if (!lock_card(card)) | |
1da177e4 | 1201 | return; |
d8d16e47 | 1202 | |
1da177e4 LT |
1203 | outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base); |
1204 | outw((length & 0xff) << 8 | 0x00, base); | |
1205 | outw((length & 0xff00), base); | |
1206 | InterruptTheCard(base); | |
1207 | ||
1208 | unlock_card(card); | |
1209 | } | |
1210 | ||
1211 | static int isicom_tiocmget(struct tty_struct *tty, struct file *file) | |
1212 | { | |
8070e35c | 1213 | struct isi_port *port = tty->driver_data; |
1da177e4 | 1214 | /* just send the port status */ |
8070e35c | 1215 | u16 status = port->status; |
1da177e4 LT |
1216 | |
1217 | if (isicom_paranoia_check(port, tty->name, "isicom_ioctl")) | |
1218 | return -ENODEV; | |
d8d16e47 | 1219 | |
1da177e4 LT |
1220 | return ((status & ISI_RTS) ? TIOCM_RTS : 0) | |
1221 | ((status & ISI_DTR) ? TIOCM_DTR : 0) | | |
1222 | ((status & ISI_DCD) ? TIOCM_CAR : 0) | | |
1223 | ((status & ISI_DSR) ? TIOCM_DSR : 0) | | |
1224 | ((status & ISI_CTS) ? TIOCM_CTS : 0) | | |
1225 | ((status & ISI_RI ) ? TIOCM_RI : 0); | |
1226 | } | |
1227 | ||
1228 | static int isicom_tiocmset(struct tty_struct *tty, struct file *file, | |
d8d16e47 | 1229 | unsigned int set, unsigned int clear) |
1da177e4 | 1230 | { |
8070e35c | 1231 | struct isi_port *port = tty->driver_data; |
cfe7c09a | 1232 | unsigned long flags; |
d8d16e47 | 1233 | |
1da177e4 LT |
1234 | if (isicom_paranoia_check(port, tty->name, "isicom_ioctl")) |
1235 | return -ENODEV; | |
d8d16e47 | 1236 | |
cfe7c09a | 1237 | spin_lock_irqsave(&port->card->card_lock, flags); |
1da177e4 LT |
1238 | if (set & TIOCM_RTS) |
1239 | raise_rts(port); | |
1240 | if (set & TIOCM_DTR) | |
1241 | raise_dtr(port); | |
1242 | ||
1243 | if (clear & TIOCM_RTS) | |
1244 | drop_rts(port); | |
1245 | if (clear & TIOCM_DTR) | |
1246 | drop_dtr(port); | |
cfe7c09a | 1247 | spin_unlock_irqrestore(&port->card->card_lock, flags); |
1da177e4 LT |
1248 | |
1249 | return 0; | |
d8d16e47 | 1250 | } |
1da177e4 | 1251 | |
d8d16e47 JS |
1252 | static int isicom_set_serial_info(struct isi_port *port, |
1253 | struct serial_struct __user *info) | |
1da177e4 LT |
1254 | { |
1255 | struct serial_struct newinfo; | |
1256 | int reconfig_port; | |
1257 | ||
d8d16e47 | 1258 | if (copy_from_user(&newinfo, info, sizeof(newinfo))) |
1da177e4 | 1259 | return -EFAULT; |
d8d16e47 | 1260 | |
1eac4947 AC |
1261 | lock_kernel(); |
1262 | ||
d8d16e47 JS |
1263 | reconfig_port = ((port->flags & ASYNC_SPD_MASK) != |
1264 | (newinfo.flags & ASYNC_SPD_MASK)); | |
1265 | ||
1da177e4 LT |
1266 | if (!capable(CAP_SYS_ADMIN)) { |
1267 | if ((newinfo.close_delay != port->close_delay) || | |
d8d16e47 JS |
1268 | (newinfo.closing_wait != port->closing_wait) || |
1269 | ((newinfo.flags & ~ASYNC_USR_MASK) != | |
1eac4947 AC |
1270 | (port->flags & ~ASYNC_USR_MASK))) { |
1271 | unlock_kernel(); | |
1da177e4 | 1272 | return -EPERM; |
1eac4947 | 1273 | } |
1da177e4 LT |
1274 | port->flags = ((port->flags & ~ ASYNC_USR_MASK) | |
1275 | (newinfo.flags & ASYNC_USR_MASK)); | |
d8d16e47 | 1276 | } |
1da177e4 LT |
1277 | else { |
1278 | port->close_delay = newinfo.close_delay; | |
d8d16e47 JS |
1279 | port->closing_wait = newinfo.closing_wait; |
1280 | port->flags = ((port->flags & ~ASYNC_FLAGS) | | |
1da177e4 LT |
1281 | (newinfo.flags & ASYNC_FLAGS)); |
1282 | } | |
1283 | if (reconfig_port) { | |
cfe7c09a JS |
1284 | unsigned long flags; |
1285 | spin_lock_irqsave(&port->card->card_lock, flags); | |
1da177e4 | 1286 | isicom_config_port(port); |
cfe7c09a | 1287 | spin_unlock_irqrestore(&port->card->card_lock, flags); |
1da177e4 | 1288 | } |
1eac4947 | 1289 | unlock_kernel(); |
d8d16e47 JS |
1290 | return 0; |
1291 | } | |
1da177e4 | 1292 | |
d8d16e47 JS |
1293 | static int isicom_get_serial_info(struct isi_port *port, |
1294 | struct serial_struct __user *info) | |
1da177e4 LT |
1295 | { |
1296 | struct serial_struct out_info; | |
d8d16e47 | 1297 | |
1eac4947 | 1298 | lock_kernel(); |
1da177e4 LT |
1299 | memset(&out_info, 0, sizeof(out_info)); |
1300 | /* out_info.type = ? */ | |
1301 | out_info.line = port - isi_ports; | |
1302 | out_info.port = port->card->base; | |
1303 | out_info.irq = port->card->irq; | |
1304 | out_info.flags = port->flags; | |
1305 | /* out_info.baud_base = ? */ | |
1306 | out_info.close_delay = port->close_delay; | |
1307 | out_info.closing_wait = port->closing_wait; | |
1eac4947 | 1308 | unlock_kernel(); |
d8d16e47 | 1309 | if (copy_to_user(info, &out_info, sizeof(out_info))) |
1da177e4 LT |
1310 | return -EFAULT; |
1311 | return 0; | |
d8d16e47 | 1312 | } |
1da177e4 | 1313 | |
d8d16e47 JS |
1314 | static int isicom_ioctl(struct tty_struct *tty, struct file *filp, |
1315 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1316 | { |
8070e35c | 1317 | struct isi_port *port = tty->driver_data; |
1da177e4 LT |
1318 | void __user *argp = (void __user *)arg; |
1319 | int retval; | |
1320 | ||
1321 | if (isicom_paranoia_check(port, tty->name, "isicom_ioctl")) | |
1322 | return -ENODEV; | |
1323 | ||
1324 | switch(cmd) { | |
d8d16e47 JS |
1325 | case TCSBRK: |
1326 | retval = tty_check_change(tty); | |
1327 | if (retval) | |
1328 | return retval; | |
1329 | tty_wait_until_sent(tty, 0); | |
1330 | if (!arg) | |
1331 | isicom_send_break(port, HZ/4); | |
1332 | return 0; | |
1333 | ||
1334 | case TCSBRKP: | |
1335 | retval = tty_check_change(tty); | |
1336 | if (retval) | |
1337 | return retval; | |
1338 | tty_wait_until_sent(tty, 0); | |
1339 | isicom_send_break(port, arg ? arg * (HZ/10) : HZ/4); | |
1340 | return 0; | |
d8d16e47 JS |
1341 | case TIOCGSERIAL: |
1342 | return isicom_get_serial_info(port, argp); | |
1343 | ||
1344 | case TIOCSSERIAL: | |
1345 | return isicom_set_serial_info(port, argp); | |
1346 | ||
1347 | default: | |
1348 | return -ENOIOCTLCMD; | |
1da177e4 LT |
1349 | } |
1350 | return 0; | |
1351 | } | |
1352 | ||
1353 | /* set_termios et all */ | |
d8d16e47 | 1354 | static void isicom_set_termios(struct tty_struct *tty, |
606d099c | 1355 | struct ktermios *old_termios) |
1da177e4 | 1356 | { |
8070e35c | 1357 | struct isi_port *port = tty->driver_data; |
cfe7c09a | 1358 | unsigned long flags; |
d8d16e47 | 1359 | |
1da177e4 LT |
1360 | if (isicom_paranoia_check(port, tty->name, "isicom_set_termios")) |
1361 | return; | |
d8d16e47 | 1362 | |
1da177e4 | 1363 | if (tty->termios->c_cflag == old_termios->c_cflag && |
d8d16e47 | 1364 | tty->termios->c_iflag == old_termios->c_iflag) |
1da177e4 | 1365 | return; |
d8d16e47 | 1366 | |
cfe7c09a | 1367 | spin_lock_irqsave(&port->card->card_lock, flags); |
1da177e4 | 1368 | isicom_config_port(port); |
cfe7c09a | 1369 | spin_unlock_irqrestore(&port->card->card_lock, flags); |
d8d16e47 | 1370 | |
1da177e4 | 1371 | if ((old_termios->c_cflag & CRTSCTS) && |
d8d16e47 | 1372 | !(tty->termios->c_cflag & CRTSCTS)) { |
1da177e4 | 1373 | tty->hw_stopped = 0; |
d8d16e47 JS |
1374 | isicom_start(tty); |
1375 | } | |
1da177e4 LT |
1376 | } |
1377 | ||
1378 | /* throttle et all */ | |
d8d16e47 | 1379 | static void isicom_throttle(struct tty_struct *tty) |
1da177e4 | 1380 | { |
8070e35c | 1381 | struct isi_port *port = tty->driver_data; |
d8d16e47 JS |
1382 | struct isi_board *card = port->card; |
1383 | ||
1da177e4 LT |
1384 | if (isicom_paranoia_check(port, tty->name, "isicom_throttle")) |
1385 | return; | |
d8d16e47 | 1386 | |
1da177e4 LT |
1387 | /* tell the card that this port cannot handle any more data for now */ |
1388 | card->port_status &= ~(1 << port->channel); | |
1389 | outw(card->port_status, card->base + 0x02); | |
1390 | } | |
1391 | ||
1392 | /* unthrottle et all */ | |
d8d16e47 | 1393 | static void isicom_unthrottle(struct tty_struct *tty) |
1da177e4 | 1394 | { |
8070e35c | 1395 | struct isi_port *port = tty->driver_data; |
d8d16e47 JS |
1396 | struct isi_board *card = port->card; |
1397 | ||
1da177e4 LT |
1398 | if (isicom_paranoia_check(port, tty->name, "isicom_unthrottle")) |
1399 | return; | |
d8d16e47 | 1400 | |
1da177e4 LT |
1401 | /* tell the card that this port is ready to accept more data */ |
1402 | card->port_status |= (1 << port->channel); | |
1403 | outw(card->port_status, card->base + 0x02); | |
1404 | } | |
1405 | ||
1406 | /* stop et all */ | |
d8d16e47 | 1407 | static void isicom_stop(struct tty_struct *tty) |
1da177e4 | 1408 | { |
8070e35c | 1409 | struct isi_port *port = tty->driver_data; |
1da177e4 LT |
1410 | |
1411 | if (isicom_paranoia_check(port, tty->name, "isicom_stop")) | |
1412 | return; | |
d8d16e47 | 1413 | |
1da177e4 LT |
1414 | /* this tells the transmitter not to consider this port for |
1415 | data output to the card. */ | |
1416 | port->status &= ~ISI_TXOK; | |
1417 | } | |
1418 | ||
1419 | /* start et all */ | |
d8d16e47 | 1420 | static void isicom_start(struct tty_struct *tty) |
1da177e4 | 1421 | { |
8070e35c | 1422 | struct isi_port *port = tty->driver_data; |
d8d16e47 | 1423 | |
1da177e4 LT |
1424 | if (isicom_paranoia_check(port, tty->name, "isicom_start")) |
1425 | return; | |
d8d16e47 | 1426 | |
1da177e4 LT |
1427 | /* this tells the transmitter to consider this port for |
1428 | data output to the card. */ | |
1429 | port->status |= ISI_TXOK; | |
1430 | } | |
1431 | ||
d8d16e47 | 1432 | static void isicom_hangup(struct tty_struct *tty) |
1da177e4 | 1433 | { |
8070e35c | 1434 | struct isi_port *port = tty->driver_data; |
cfe7c09a | 1435 | unsigned long flags; |
d8d16e47 | 1436 | |
1da177e4 LT |
1437 | if (isicom_paranoia_check(port, tty->name, "isicom_hangup")) |
1438 | return; | |
d8d16e47 | 1439 | |
cfe7c09a | 1440 | spin_lock_irqsave(&port->card->card_lock, flags); |
1da177e4 | 1441 | isicom_shutdown_port(port); |
cfe7c09a JS |
1442 | spin_unlock_irqrestore(&port->card->card_lock, flags); |
1443 | ||
1da177e4 LT |
1444 | port->count = 0; |
1445 | port->flags &= ~ASYNC_NORMAL_ACTIVE; | |
1446 | port->tty = NULL; | |
1447 | wake_up_interruptible(&port->open_wait); | |
1448 | } | |
1449 | ||
1450 | /* flush_buffer et all */ | |
d8d16e47 | 1451 | static void isicom_flush_buffer(struct tty_struct *tty) |
1da177e4 | 1452 | { |
8070e35c | 1453 | struct isi_port *port = tty->driver_data; |
d8d16e47 | 1454 | struct isi_board *card = port->card; |
1da177e4 | 1455 | unsigned long flags; |
d8d16e47 | 1456 | |
1da177e4 LT |
1457 | if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer")) |
1458 | return; | |
d8d16e47 | 1459 | |
1da177e4 LT |
1460 | spin_lock_irqsave(&card->card_lock, flags); |
1461 | port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; | |
1462 | spin_unlock_irqrestore(&card->card_lock, flags); | |
d8d16e47 | 1463 | |
1da177e4 LT |
1464 | tty_wakeup(tty); |
1465 | } | |
1466 | ||
9ac0948b JS |
1467 | /* |
1468 | * Driver init and deinit functions | |
1469 | */ | |
1da177e4 | 1470 | |
b68e31d0 | 1471 | static const struct tty_operations isicom_ops = { |
d8d16e47 JS |
1472 | .open = isicom_open, |
1473 | .close = isicom_close, | |
1474 | .write = isicom_write, | |
1475 | .put_char = isicom_put_char, | |
1476 | .flush_chars = isicom_flush_chars, | |
1477 | .write_room = isicom_write_room, | |
1da177e4 | 1478 | .chars_in_buffer = isicom_chars_in_buffer, |
d8d16e47 JS |
1479 | .ioctl = isicom_ioctl, |
1480 | .set_termios = isicom_set_termios, | |
1481 | .throttle = isicom_throttle, | |
1482 | .unthrottle = isicom_unthrottle, | |
1483 | .stop = isicom_stop, | |
1484 | .start = isicom_start, | |
1485 | .hangup = isicom_hangup, | |
1486 | .flush_buffer = isicom_flush_buffer, | |
1487 | .tiocmget = isicom_tiocmget, | |
1488 | .tiocmset = isicom_tiocmset, | |
1da177e4 LT |
1489 | }; |
1490 | ||
9ac0948b JS |
1491 | static int __devinit reset_card(struct pci_dev *pdev, |
1492 | const unsigned int card, unsigned int *signature) | |
1da177e4 | 1493 | { |
9ac0948b JS |
1494 | struct isi_board *board = pci_get_drvdata(pdev); |
1495 | unsigned long base = board->base; | |
f0a0ba6d | 1496 | unsigned int sig, portcount = 0; |
9ac0948b | 1497 | int retval = 0; |
d8d16e47 | 1498 | |
9ac0948b JS |
1499 | dev_dbg(&pdev->dev, "ISILoad:Resetting Card%d at 0x%lx\n", card + 1, |
1500 | base); | |
d8d16e47 | 1501 | |
9ac0948b | 1502 | inw(base + 0x8); |
d8d16e47 | 1503 | |
f0a0ba6d | 1504 | msleep(10); |
9ac0948b JS |
1505 | |
1506 | outw(0, base + 0x8); /* Reset */ | |
1507 | ||
f0a0ba6d | 1508 | msleep(1000); |
9ac0948b | 1509 | |
f0a0ba6d JS |
1510 | sig = inw(base + 0x4) & 0xff; |
1511 | ||
1512 | if (sig != 0xa5 && sig != 0xbb && sig != 0xcc && sig != 0xdd && | |
1513 | sig != 0xee) { | |
1514 | dev_warn(&pdev->dev, "ISILoad:Card%u reset failure (Possible " | |
1515 | "bad I/O Port Address 0x%lx).\n", card + 1, base); | |
1516 | dev_dbg(&pdev->dev, "Sig=0x%x\n", sig); | |
1517 | retval = -EIO; | |
1518 | goto end; | |
1519 | } | |
1520 | ||
1521 | msleep(10); | |
9ac0948b | 1522 | |
18234f88 | 1523 | portcount = inw(base + 0x2); |
07fb6f26 | 1524 | if (!(inw(base + 0xe) & 0x1) || (portcount != 0 && portcount != 4 && |
f0a0ba6d | 1525 | portcount != 8 && portcount != 16)) { |
898eb71c | 1526 | dev_err(&pdev->dev, "ISILoad:PCI Card%d reset failure.\n", |
f0a0ba6d | 1527 | card + 1); |
18234f88 JS |
1528 | retval = -EIO; |
1529 | goto end; | |
9ac0948b JS |
1530 | } |
1531 | ||
f0a0ba6d | 1532 | switch (sig) { |
9ac0948b JS |
1533 | case 0xa5: |
1534 | case 0xbb: | |
1535 | case 0xdd: | |
18234f88 | 1536 | board->port_count = (portcount == 4) ? 4 : 8; |
9ac0948b JS |
1537 | board->shift_count = 12; |
1538 | break; | |
1539 | case 0xcc: | |
f0a0ba6d | 1540 | case 0xee: |
9ac0948b JS |
1541 | board->port_count = 16; |
1542 | board->shift_count = 11; | |
1543 | break; | |
d8d16e47 | 1544 | } |
9ac0948b | 1545 | dev_info(&pdev->dev, "-Done\n"); |
f0a0ba6d | 1546 | *signature = sig; |
d8d16e47 | 1547 | |
9ac0948b JS |
1548 | end: |
1549 | return retval; | |
1da177e4 LT |
1550 | } |
1551 | ||
e65c1db1 JS |
1552 | static int __devinit load_firmware(struct pci_dev *pdev, |
1553 | const unsigned int index, const unsigned int signature) | |
1554 | { | |
1555 | struct isi_board *board = pci_get_drvdata(pdev); | |
1556 | const struct firmware *fw; | |
1557 | unsigned long base = board->base; | |
1558 | unsigned int a; | |
1559 | u16 word_count, status; | |
1560 | int retval = -EIO; | |
1561 | char *name; | |
1562 | u8 *data; | |
1563 | ||
1564 | struct stframe { | |
1565 | u16 addr; | |
1566 | u16 count; | |
1567 | u8 data[0]; | |
1568 | } *frame; | |
1569 | ||
1570 | switch (signature) { | |
1571 | case 0xa5: | |
1572 | name = "isi608.bin"; | |
1573 | break; | |
1574 | case 0xbb: | |
1575 | name = "isi608em.bin"; | |
1576 | break; | |
1577 | case 0xcc: | |
1578 | name = "isi616em.bin"; | |
1579 | break; | |
1580 | case 0xdd: | |
1581 | name = "isi4608.bin"; | |
1582 | break; | |
1583 | case 0xee: | |
1584 | name = "isi4616.bin"; | |
1585 | break; | |
1586 | default: | |
1587 | dev_err(&pdev->dev, "Unknown signature.\n"); | |
1588 | goto end; | |
1589 | } | |
1590 | ||
1591 | retval = request_firmware(&fw, name, &pdev->dev); | |
1592 | if (retval) | |
1593 | goto end; | |
1594 | ||
e4e04088 JS |
1595 | retval = -EIO; |
1596 | ||
e65c1db1 JS |
1597 | for (frame = (struct stframe *)fw->data; |
1598 | frame < (struct stframe *)(fw->data + fw->size); | |
e4e04088 JS |
1599 | frame = (struct stframe *)((u8 *)(frame + 1) + |
1600 | frame->count)) { | |
e65c1db1 JS |
1601 | if (WaitTillCardIsFree(base)) |
1602 | goto errrelfw; | |
1603 | ||
1604 | outw(0xf0, base); /* start upload sequence */ | |
1605 | outw(0x00, base); | |
1606 | outw(frame->addr, base); /* lsb of address */ | |
1607 | ||
1608 | word_count = frame->count / 2 + frame->count % 2; | |
1609 | outw(word_count, base); | |
1610 | InterruptTheCard(base); | |
1611 | ||
1612 | udelay(100); /* 0x2f */ | |
1613 | ||
1614 | if (WaitTillCardIsFree(base)) | |
1615 | goto errrelfw; | |
1616 | ||
1617 | if ((status = inw(base + 0x4)) != 0) { | |
1618 | dev_warn(&pdev->dev, "Card%d rejected load header:\n" | |
898eb71c JP |
1619 | KERN_WARNING "Address:0x%x\n" |
1620 | KERN_WARNING "Count:0x%x\n" | |
1621 | KERN_WARNING "Status:0x%x\n", | |
e65c1db1 JS |
1622 | index + 1, frame->addr, frame->count, status); |
1623 | goto errrelfw; | |
1624 | } | |
1625 | outsw(base, frame->data, word_count); | |
1626 | ||
1627 | InterruptTheCard(base); | |
1628 | ||
1629 | udelay(50); /* 0x0f */ | |
1630 | ||
1631 | if (WaitTillCardIsFree(base)) | |
1632 | goto errrelfw; | |
1633 | ||
1634 | if ((status = inw(base + 0x4)) != 0) { | |
1635 | dev_err(&pdev->dev, "Card%d got out of sync.Card " | |
1636 | "Status:0x%x\n", index + 1, status); | |
1637 | goto errrelfw; | |
1638 | } | |
1639 | } | |
1640 | ||
e65c1db1 JS |
1641 | /* XXX: should we test it by reading it back and comparing with original like |
1642 | * in load firmware package? */ | |
e4e04088 JS |
1643 | for (frame = (struct stframe *)fw->data; |
1644 | frame < (struct stframe *)(fw->data + fw->size); | |
1645 | frame = (struct stframe *)((u8 *)(frame + 1) + | |
1646 | frame->count)) { | |
e65c1db1 JS |
1647 | if (WaitTillCardIsFree(base)) |
1648 | goto errrelfw; | |
1649 | ||
1650 | outw(0xf1, base); /* start download sequence */ | |
1651 | outw(0x00, base); | |
1652 | outw(frame->addr, base); /* lsb of address */ | |
1653 | ||
1654 | word_count = (frame->count >> 1) + frame->count % 2; | |
1655 | outw(word_count + 1, base); | |
1656 | InterruptTheCard(base); | |
1657 | ||
1658 | udelay(50); /* 0xf */ | |
1659 | ||
1660 | if (WaitTillCardIsFree(base)) | |
1661 | goto errrelfw; | |
1662 | ||
1663 | if ((status = inw(base + 0x4)) != 0) { | |
1664 | dev_warn(&pdev->dev, "Card%d rejected verify header:\n" | |
898eb71c JP |
1665 | KERN_WARNING "Address:0x%x\n" |
1666 | KERN_WARNING "Count:0x%x\n" | |
1667 | KERN_WARNING "Status: 0x%x\n", | |
e65c1db1 JS |
1668 | index + 1, frame->addr, frame->count, status); |
1669 | goto errrelfw; | |
1670 | } | |
1671 | ||
1672 | data = kmalloc(word_count * 2, GFP_KERNEL); | |
f0671378 JS |
1673 | if (data == NULL) { |
1674 | dev_err(&pdev->dev, "Card%d, firmware upload " | |
1675 | "failed, not enough memory\n", index + 1); | |
1676 | goto errrelfw; | |
1677 | } | |
e65c1db1 JS |
1678 | inw(base); |
1679 | insw(base, data, word_count); | |
1680 | InterruptTheCard(base); | |
1681 | ||
1682 | for (a = 0; a < frame->count; a++) | |
1683 | if (data[a] != frame->data[a]) { | |
1684 | kfree(data); | |
1685 | dev_err(&pdev->dev, "Card%d, firmware upload " | |
1686 | "failed\n", index + 1); | |
1687 | goto errrelfw; | |
1688 | } | |
1689 | kfree(data); | |
1690 | ||
1691 | udelay(50); /* 0xf */ | |
1692 | ||
1693 | if (WaitTillCardIsFree(base)) | |
1694 | goto errrelfw; | |
1695 | ||
1696 | if ((status = inw(base + 0x4)) != 0) { | |
1697 | dev_err(&pdev->dev, "Card%d verify got out of sync. " | |
1698 | "Card Status:0x%x\n", index + 1, status); | |
1699 | goto errrelfw; | |
1700 | } | |
1701 | } | |
1702 | ||
e4e04088 JS |
1703 | /* xfer ctrl */ |
1704 | if (WaitTillCardIsFree(base)) | |
1705 | goto errrelfw; | |
1706 | ||
1707 | outw(0xf2, base); | |
1708 | outw(0x800, base); | |
1709 | outw(0x0, base); | |
1710 | outw(0x0, base); | |
1711 | InterruptTheCard(base); | |
1712 | outw(0x0, base + 0x4); /* for ISI4608 cards */ | |
1713 | ||
e65c1db1 JS |
1714 | board->status |= FIRMWARE_LOADED; |
1715 | retval = 0; | |
1716 | ||
1717 | errrelfw: | |
1718 | release_firmware(fw); | |
1719 | end: | |
1720 | return retval; | |
1721 | } | |
1722 | ||
1da177e4 LT |
1723 | /* |
1724 | * Insmod can set static symbols so keep these static | |
1725 | */ | |
1ed0c0b7 | 1726 | static unsigned int card_count; |
9ac0948b JS |
1727 | |
1728 | static int __devinit isicom_probe(struct pci_dev *pdev, | |
1729 | const struct pci_device_id *ent) | |
1730 | { | |
4969b3a4 | 1731 | unsigned int signature, index; |
9ac0948b | 1732 | int retval = -EPERM; |
9ac0948b JS |
1733 | struct isi_board *board = NULL; |
1734 | ||
1ed0c0b7 | 1735 | if (card_count >= BOARD_COUNT) |
9ac0948b JS |
1736 | goto err; |
1737 | ||
9ac0948b JS |
1738 | dev_info(&pdev->dev, "ISI PCI Card(Device ID 0x%x)\n", ent->device); |
1739 | ||
1740 | /* allot the first empty slot in the array */ | |
1741 | for (index = 0; index < BOARD_COUNT; index++) | |
1742 | if (isi_card[index].base == 0) { | |
1743 | board = &isi_card[index]; | |
1744 | break; | |
1745 | } | |
1746 | ||
938a7023 | 1747 | board->index = index; |
4969b3a4 JS |
1748 | board->base = pci_resource_start(pdev, 3); |
1749 | board->irq = pdev->irq; | |
1ed0c0b7 | 1750 | card_count++; |
9ac0948b JS |
1751 | |
1752 | pci_set_drvdata(pdev, board); | |
1753 | ||
78028da9 JS |
1754 | retval = pci_request_region(pdev, 3, ISICOM_NAME); |
1755 | if (retval) { | |
09a4a112 JS |
1756 | dev_err(&pdev->dev, "I/O Region 0x%lx-0x%lx is busy. Card%d " |
1757 | "will be disabled.\n", board->base, board->base + 15, | |
1758 | index + 1); | |
1759 | retval = -EBUSY; | |
1ed0c0b7 | 1760 | goto errdec; |
09a4a112 | 1761 | } |
9ac0948b | 1762 | |
09a4a112 JS |
1763 | retval = request_irq(board->irq, isicom_interrupt, |
1764 | IRQF_SHARED | IRQF_DISABLED, ISICOM_NAME, board); | |
1765 | if (retval < 0) { | |
1766 | dev_err(&pdev->dev, "Could not install handler at Irq %d. " | |
1767 | "Card%d will be disabled.\n", board->irq, index + 1); | |
9ac0948b | 1768 | goto errunrr; |
09a4a112 | 1769 | } |
9ac0948b JS |
1770 | |
1771 | retval = reset_card(pdev, index, &signature); | |
1772 | if (retval < 0) | |
1773 | goto errunri; | |
1774 | ||
e65c1db1 JS |
1775 | retval = load_firmware(pdev, index, signature); |
1776 | if (retval < 0) | |
1777 | goto errunri; | |
1778 | ||
938a7023 JS |
1779 | for (index = 0; index < board->port_count; index++) |
1780 | tty_register_device(isicom_normal, board->index * 16 + index, | |
1781 | &pdev->dev); | |
1782 | ||
9ac0948b JS |
1783 | return 0; |
1784 | ||
1785 | errunri: | |
1786 | free_irq(board->irq, board); | |
1787 | errunrr: | |
78028da9 | 1788 | pci_release_region(pdev, 3); |
1ed0c0b7 | 1789 | errdec: |
9ac0948b | 1790 | board->base = 0; |
1ed0c0b7 JS |
1791 | card_count--; |
1792 | err: | |
9ac0948b JS |
1793 | return retval; |
1794 | } | |
1795 | ||
1796 | static void __devexit isicom_remove(struct pci_dev *pdev) | |
1797 | { | |
1798 | struct isi_board *board = pci_get_drvdata(pdev); | |
938a7023 JS |
1799 | unsigned int i; |
1800 | ||
1801 | for (i = 0; i < board->port_count; i++) | |
1802 | tty_unregister_device(isicom_normal, board->index * 16 + i); | |
9ac0948b JS |
1803 | |
1804 | free_irq(board->irq, board); | |
78028da9 | 1805 | pci_release_region(pdev, 3); |
1ed0c0b7 JS |
1806 | board->base = 0; |
1807 | card_count--; | |
9ac0948b | 1808 | } |
1da177e4 | 1809 | |
ca262005 | 1810 | static int __init isicom_init(void) |
1da177e4 | 1811 | { |
9ac0948b JS |
1812 | int retval, idx, channel; |
1813 | struct isi_port *port; | |
d8d16e47 | 1814 | |
9ac0948b JS |
1815 | for(idx = 0; idx < BOARD_COUNT; idx++) { |
1816 | port = &isi_ports[idx * 16]; | |
1817 | isi_card[idx].ports = port; | |
1818 | spin_lock_init(&isi_card[idx].card_lock); | |
1819 | for (channel = 0; channel < 16; channel++, port++) { | |
1820 | port->magic = ISICOM_MAGIC; | |
1821 | port->card = &isi_card[idx]; | |
1822 | port->channel = channel; | |
1823 | port->close_delay = 50 * HZ/100; | |
1824 | port->closing_wait = 3000 * HZ/100; | |
9ac0948b JS |
1825 | port->status = 0; |
1826 | init_waitqueue_head(&port->open_wait); | |
1827 | init_waitqueue_head(&port->close_wait); | |
1828 | /* . . . */ | |
1829 | } | |
1830 | isi_card[idx].base = 0; | |
1831 | isi_card[idx].irq = 0; | |
1da177e4 | 1832 | } |
d8d16e47 | 1833 | |
09a4a112 JS |
1834 | /* tty driver structure initialization */ |
1835 | isicom_normal = alloc_tty_driver(PORT_COUNT); | |
1836 | if (!isicom_normal) { | |
1837 | retval = -ENOMEM; | |
9ac0948b | 1838 | goto error; |
09a4a112 JS |
1839 | } |
1840 | ||
1841 | isicom_normal->owner = THIS_MODULE; | |
1842 | isicom_normal->name = "ttyM"; | |
1843 | isicom_normal->major = ISICOM_NMAJOR; | |
1844 | isicom_normal->minor_start = 0; | |
1845 | isicom_normal->type = TTY_DRIVER_TYPE_SERIAL; | |
1846 | isicom_normal->subtype = SERIAL_TYPE_NORMAL; | |
1847 | isicom_normal->init_termios = tty_std_termios; | |
1848 | isicom_normal->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | | |
1849 | CLOCAL; | |
938a7023 JS |
1850 | isicom_normal->flags = TTY_DRIVER_REAL_RAW | |
1851 | TTY_DRIVER_DYNAMIC_DEV; | |
09a4a112 JS |
1852 | tty_set_operations(isicom_normal, &isicom_ops); |
1853 | ||
1854 | retval = tty_register_driver(isicom_normal); | |
1855 | if (retval) { | |
1856 | pr_dbg("Couldn't register the dialin driver\n"); | |
1857 | goto err_puttty; | |
1858 | } | |
1da177e4 | 1859 | |
9ac0948b | 1860 | retval = pci_register_driver(&isicom_driver); |
1da177e4 | 1861 | if (retval < 0) { |
9ac0948b | 1862 | printk(KERN_ERR "ISICOM: Unable to register pci driver.\n"); |
09a4a112 | 1863 | goto err_unrtty; |
1da177e4 | 1864 | } |
d8d16e47 | 1865 | |
34b55b86 | 1866 | mod_timer(&tx, jiffies + 1); |
d8d16e47 | 1867 | |
1da177e4 | 1868 | return 0; |
09a4a112 JS |
1869 | err_unrtty: |
1870 | tty_unregister_driver(isicom_normal); | |
1871 | err_puttty: | |
1872 | put_tty_driver(isicom_normal); | |
9ac0948b JS |
1873 | error: |
1874 | return retval; | |
1da177e4 LT |
1875 | } |
1876 | ||
1877 | static void __exit isicom_exit(void) | |
1878 | { | |
e327325f | 1879 | del_timer_sync(&tx); |
aaa246ea | 1880 | |
9ac0948b | 1881 | pci_unregister_driver(&isicom_driver); |
09a4a112 JS |
1882 | tty_unregister_driver(isicom_normal); |
1883 | put_tty_driver(isicom_normal); | |
1da177e4 LT |
1884 | } |
1885 | ||
ca262005 | 1886 | module_init(isicom_init); |
1da177e4 | 1887 | module_exit(isicom_exit); |
aaa246ea JS |
1888 | |
1889 | MODULE_AUTHOR("MultiTech"); | |
1890 | MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech"); | |
1891 | MODULE_LICENSE("GPL"); |