blob: 761c5622b7af0f3a6438927ebe04ad7a63b8bf91 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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.
Jiri Slabyd8d16e42006-01-09 20:54:21 -080023 * This is to prevent the firmware
Linus Torvalds1da177e2005-04-16 15:20:36 -070024 * 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
Jiri Slabyd8d16e42006-01-09 20:54:21 -080034 * when the last port on the card is
Linus Torvalds1da177e2005-04-16 15:20:36 -070035 * closed.
36 *
37 * 10/5/00 sameer Signal mask setup command added
Jiri Slabyd8d16e42006-01-09 20:54:21 -080038 * to isicom_setup_port and
Linus Torvalds1da177e2005-04-16 15:20:36 -070039 * isicom_shutdown_port.
40 *
41 * 24/5/00 sameer The driver is now SMP aware.
Jiri Slabyd8d16e42006-01-09 20:54:21 -080042 *
43 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070044 * 27/11/00 Vinayak P Risbud Fixed the Driver Crash Problem
Jiri Slabyd8d16e42006-01-09 20:54:21 -080045 *
46 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070047 * 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 *
Jiri Slabyd8d16e42006-01-09 20:54:21 -080053 * 11/04/01 Kevin Fixed firmware load problem with
Linus Torvalds1da177e2005-04-16 15:20:36 -070054 * ISIHP-4X card
Jiri Slabyd8d16e42006-01-09 20:54:21 -080055 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070056 * 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
Jiri Slabyd8d16e42006-01-09 20:54:21 -080065 * info during insmod as well as module
Linus Torvalds1da177e2005-04-16 15:20:36 -070066 * listing by lsmod.
Jiri Slabyd8d16e42006-01-09 20:54:21 -080067 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070068 * 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.
Jiri Slabyd8d16e42006-01-09 20:54:21 -080076 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070077 * 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 *
Jiri Slabyd8d16e42006-01-09 20:54:21 -080082 * 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070089 * 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 *
Jiri Slabyd8d16e42006-01-09 20:54:21 -080096 * To use this driver you also need the support package. You
Linus Torvalds1da177e2005-04-16 15:20:36 -070097 * can find this in RPM format on
98 * ftp://ftp.linux.org.uk/pub/linux/alan
Jiri Slabyd8d16e42006-01-09 20:54:21 -080099 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100 * 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
110 * Hotplug
111 * Merge testing
112 * 64-bit verification
113 */
114
115#include <linux/module.h>
116#include <linux/kernel.h>
117#include <linux/tty.h>
Alan Cox33f0f882006-01-09 20:54:13 -0800118#include <linux/tty_flip.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119#include <linux/termios.h>
120#include <linux/fs.h>
121#include <linux/sched.h>
122#include <linux/serial.h>
123#include <linux/mm.h>
124#include <linux/miscdevice.h>
125#include <linux/interrupt.h>
126#include <linux/timer.h>
127#include <linux/delay.h>
128#include <linux/ioport.h>
129
130#include <asm/uaccess.h>
131#include <asm/io.h>
132#include <asm/system.h>
133
134#include <linux/pci.h>
135
136#include <linux/isicom.h>
137
138static struct pci_device_id isicom_pci_tbl[] = {
139 { VENDOR_ID, 0x2028, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
140 { VENDOR_ID, 0x2051, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
141 { VENDOR_ID, 0x2052, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
142 { VENDOR_ID, 0x2053, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
143 { VENDOR_ID, 0x2054, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
144 { VENDOR_ID, 0x2055, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
145 { VENDOR_ID, 0x2056, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
146 { VENDOR_ID, 0x2057, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
147 { VENDOR_ID, 0x2058, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
148 { 0 }
149};
150MODULE_DEVICE_TABLE(pci, isicom_pci_tbl);
151
152static int prev_card = 3; /* start servicing isi_card[0] */
153static struct tty_driver *isicom_normal;
154
155static struct timer_list tx;
156static char re_schedule = 1;
157#ifdef ISICOM_DEBUG
158static unsigned long tx_count = 0;
159#endif
160
161static int ISILoad_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg);
162
163static void isicom_tx(unsigned long _data);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800164static void isicom_start(struct tty_struct *tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800166static unsigned char *tmp_buf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167static DECLARE_MUTEX(tmp_buf_sem);
168
169/* baud index mappings from linux defns to isi */
170
171static signed char linuxb_to_isib[] = {
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800172 -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 16, 17, 18, 19
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173};
174
175struct isi_board {
176 unsigned short base;
177 unsigned char irq;
178 unsigned char port_count;
179 unsigned short status;
180 unsigned short port_status; /* each bit represents a single port */
181 unsigned short shift_count;
182 struct isi_port * ports;
183 signed char count;
184 unsigned char isa;
185 spinlock_t card_lock; /* Card wide lock 11/5/00 -sameer */
186 unsigned long flags;
187};
188
189struct isi_port {
190 unsigned short magic;
191 unsigned int flags;
192 int count;
193 int blocked_open;
194 int close_delay;
195 unsigned short channel;
196 unsigned short status;
197 unsigned short closing_wait;
198 struct isi_board * card;
199 struct tty_struct * tty;
200 wait_queue_head_t close_wait;
201 wait_queue_head_t open_wait;
202 struct work_struct hangup_tq;
203 struct work_struct bh_tqueue;
204 unsigned char * xmit_buf;
205 int xmit_head;
206 int xmit_tail;
207 int xmit_cnt;
208};
209
210static struct isi_board isi_card[BOARD_COUNT];
211static struct isi_port isi_ports[PORT_COUNT];
212
213/*
214 * Locking functions for card level locking. We need to own both
215 * the kernel lock for the card and have the card in a position that
216 * it wants to talk.
217 */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800218
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219static int lock_card(struct isi_board *card)
220{
221 char retries;
222 unsigned short base = card->base;
223
224 for (retries = 0; retries < 100; retries++) {
225 spin_lock_irqsave(&card->card_lock, card->flags);
226 if (inw(base + 0xe) & 0x1) {
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800227 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228 } else {
229 spin_unlock_irqrestore(&card->card_lock, card->flags);
230 udelay(1000); /* 1ms */
231 }
232 }
233 printk(KERN_WARNING "ISICOM: Failed to lock Card (0x%x)\n", card->base);
234 return 0; /* Failed to aquire the card! */
235}
236
237static int lock_card_at_interrupt(struct isi_board *card)
238{
239 unsigned char retries;
240 unsigned short base = card->base;
241
242 for (retries = 0; retries < 200; retries++) {
243 spin_lock_irqsave(&card->card_lock, card->flags);
244
245 if (inw(base + 0xe) & 0x1)
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800246 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 else
248 spin_unlock_irqrestore(&card->card_lock, card->flags);
249 }
250 /* Failing in interrupt is an acceptable event */
251 return 0; /* Failed to aquire the card! */
252}
253
254static void unlock_card(struct isi_board *card)
255{
256 spin_unlock_irqrestore(&card->card_lock, card->flags);
257}
258
259/*
260 * ISI Card specific ops ...
261 */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800262
263static void raise_dtr(struct isi_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264{
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800265 struct isi_board *card = port->card;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266 unsigned short base = card->base;
267 unsigned char channel = port->channel;
268
269 if (!lock_card(card))
270 return;
271
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800272 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273 outw(0x0504, base);
274 InterruptTheCard(base);
275 port->status |= ISI_DTR;
276 unlock_card(card);
277}
278
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800279static inline void drop_dtr(struct isi_port *port)
280{
281 struct isi_board *card = port->card;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282 unsigned short base = card->base;
283 unsigned char channel = port->channel;
284
285 if (!lock_card(card))
286 return;
287
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800288 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 outw(0x0404, base);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800290 InterruptTheCard(base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291 port->status &= ~ISI_DTR;
292 unlock_card(card);
293}
294
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800295static inline void raise_rts(struct isi_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296{
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800297 struct isi_board *card = port->card;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298 unsigned short base = card->base;
299 unsigned char channel = port->channel;
300
301 if (!lock_card(card))
302 return;
303
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800304 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305 outw(0x0a04, base);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800306 InterruptTheCard(base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307 port->status |= ISI_RTS;
308 unlock_card(card);
309}
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800310static inline void drop_rts(struct isi_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311{
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800312 struct isi_board *card = port->card;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313 unsigned short base = card->base;
314 unsigned char channel = port->channel;
315
316 if (!lock_card(card))
317 return;
318
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800319 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320 outw(0x0804, base);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800321 InterruptTheCard(base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322 port->status &= ~ISI_RTS;
323 unlock_card(card);
324}
325
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800326static inline void raise_dtr_rts(struct isi_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327{
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800328 struct isi_board *card = port->card;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329 unsigned short base = card->base;
330 unsigned char channel = port->channel;
331
332 if (!lock_card(card))
333 return;
334
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800335 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336 outw(0x0f04, base);
337 InterruptTheCard(base);
338 port->status |= (ISI_DTR | ISI_RTS);
339 unlock_card(card);
340}
341
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800342static void drop_dtr_rts(struct isi_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343{
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800344 struct isi_board *card = port->card;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345 unsigned short base = card->base;
346 unsigned char channel = port->channel;
347
348 if (!lock_card(card))
349 return;
350
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800351 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352 outw(0x0c04, base);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800353 InterruptTheCard(base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354 port->status &= ~(ISI_RTS | ISI_DTR);
355 unlock_card(card);
356}
357
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800358static inline void kill_queue(struct isi_port *port, short queue)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359{
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800360 struct isi_board *card = port->card;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361 unsigned short base = card->base;
362 unsigned char channel = port->channel;
363
364 if (!lock_card(card))
365 return;
366
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800367 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368 outw((queue << 8) | 0x06, base);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800369 InterruptTheCard(base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 unlock_card(card);
371}
372
373
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800374/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375 * Firmware loader driver specific routines. This needs to mostly die
376 * and be replaced with request_firmware.
377 */
378
379static struct file_operations ISILoad_fops = {
380 .owner = THIS_MODULE,
381 .ioctl = ISILoad_ioctl,
382};
383
384static struct miscdevice isiloader_device = {
385 ISILOAD_MISC_MINOR, "isictl", &ISILoad_fops
386};
387
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800388
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389static inline int WaitTillCardIsFree(unsigned short base)
390{
391 unsigned long count=0;
392 while( (!(inw(base+0xe) & 0x1)) && (count++ < 6000000));
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800393 if (inw(base+0xe)&0x1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394 return 0;
395 else
396 return 1;
397}
398
399static int ISILoad_ioctl(struct inode *inode, struct file *filp,
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800400 unsigned int cmd, unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401{
402 unsigned int card, i, j, signature, status, portcount = 0;
403 unsigned long t;
404 unsigned short word_count, base;
405 bin_frame frame;
406 void __user *argp = (void __user *)arg;
407 /* exec_record exec_rec; */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800408
409 if (get_user(card, (int __user *)argp))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 return -EFAULT;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800411
412 if (card < 0 || card >= BOARD_COUNT)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413 return -ENXIO;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800414
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415 base=isi_card[card].base;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800416
417 if (base==0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418 return -ENXIO; /* disabled or not used */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800419
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420 switch(cmd) {
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800421 case MIOCTL_RESET_CARD:
422 if (!capable(CAP_SYS_ADMIN))
423 return -EPERM;
424 printk(KERN_DEBUG "ISILoad:Resetting Card%d at 0x%x ",card+1,base);
425
426 inw(base+0x8);
427
428 for (t=jiffies+HZ/100;time_before(jiffies, t););
429
430 outw(0,base+0x8); /* Reset */
431
432 for (j=1;j<=3;j++) {
433 for (t=jiffies+HZ;time_before(jiffies, t););
434 printk(".");
435 }
436 signature=(inw(base+0x4)) & 0xff;
437 if (isi_card[card].isa) {
438
439 if (!(inw(base+0xe) & 0x1) || (inw(base+0x2))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440#ifdef ISICOM_DEBUG
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800441 printk("\nbase+0x2=0x%x , base+0xe=0x%x",inw(base+0x2),inw(base+0xe));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442#endif
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800443 printk("\nISILoad:ISA Card%d reset failure (Possible bad I/O Port Address 0x%x).\n",card+1,base);
444 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800446 }
447 else {
448 portcount = inw(base+0x2);
449 if (!(inw(base+0xe) & 0x1) || ((portcount!=0) && (portcount!=4) && (portcount!=8))) {
450#ifdef ISICOM_DEBUG
451 printk("\nbase+0x2=0x%x , base+0xe=0x%x",inw(base+0x2),inw(base+0xe));
452#endif
453 printk("\nISILoad:PCI Card%d reset failure (Possible bad I/O Port Address 0x%x).\n",card+1,base);
454 return -EIO;
455 }
456 }
457 switch(signature) {
458 case 0xa5:
459 case 0xbb:
460 case 0xdd:
461 if (isi_card[card].isa)
462 isi_card[card].port_count = 8;
463 else {
464 if (portcount == 4)
465 isi_card[card].port_count = 4;
466 else
467 isi_card[card].port_count = 8;
468 }
469 isi_card[card].shift_count = 12;
470 break;
471
472 case 0xcc: isi_card[card].port_count = 16;
473 isi_card[card].shift_count = 11;
474 break;
475
476 default: printk("ISILoad:Card%d reset failure (Possible bad I/O Port Address 0x%x).\n",card+1,base);
477#ifdef ISICOM_DEBUG
478 printk("Sig=0x%x\n",signature);
479#endif
480 return -EIO;
481 }
482 printk("-Done\n");
483 return put_user(signature,(unsigned __user *)argp);
484
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485 case MIOCTL_LOAD_FIRMWARE:
486 if (!capable(CAP_SYS_ADMIN))
487 return -EPERM;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800488
489 if (copy_from_user(&frame, argp, sizeof(bin_frame)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490 return -EFAULT;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800491
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 if (WaitTillCardIsFree(base))
493 return -EIO;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800494
495 outw(0xf0,base); /* start upload sequence */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496 outw(0x00,base);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800497 outw((frame.addr), base); /* lsb of adderess */
498
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499 word_count=(frame.count >> 1) + frame.count % 2;
500 outw(word_count, base);
501 InterruptTheCard(base);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800502
503 for (i=0;i<=0x2f;i++); /* a wee bit of delay */
504
505 if (WaitTillCardIsFree(base))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506 return -EIO;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800507
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508 if ((status=inw(base+0x4))!=0) {
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800509 printk(KERN_WARNING "ISILoad:Card%d rejected load header:\nAddress:0x%x \nCount:0x%x \nStatus:0x%x \n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 card+1, frame.addr, frame.count, status);
511 return -EIO;
512 }
513 outsw(base, (void *) frame.bin_data, word_count);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800514
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515 InterruptTheCard(base);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800516
517 for (i=0;i<=0x0f;i++); /* another wee bit of delay */
518
519 if (WaitTillCardIsFree(base))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520 return -EIO;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800521
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522 if ((status=inw(base+0x4))!=0) {
523 printk(KERN_ERR "ISILoad:Card%d got out of sync.Card Status:0x%x\n",card+1, status);
524 return -EIO;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800525 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526 return 0;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800527
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528 case MIOCTL_READ_FIRMWARE:
529 if (!capable(CAP_SYS_ADMIN))
530 return -EPERM;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800531
532 if (copy_from_user(&frame, argp, sizeof(bin_header)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533 return -EFAULT;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800534
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535 if (WaitTillCardIsFree(base))
536 return -EIO;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800537
538 outw(0xf1,base); /* start download sequence */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539 outw(0x00,base);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800540 outw((frame.addr), base); /* lsb of adderess */
541
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542 word_count=(frame.count >> 1) + frame.count % 2;
543 outw(word_count+1, base);
544 InterruptTheCard(base);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800545
546 for (i=0;i<=0xf;i++); /* a wee bit of delay */
547
548 if (WaitTillCardIsFree(base))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549 return -EIO;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800550
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551 if ((status=inw(base+0x4))!=0) {
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800552 printk(KERN_WARNING "ISILoad:Card%d rejected verify header:\nAddress:0x%x \nCount:0x%x \nStatus:0x%x \n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553 card+1, frame.addr, frame.count, status);
554 return -EIO;
555 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800556
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557 inw(base);
558 insw(base, frame.bin_data, word_count);
559 InterruptTheCard(base);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800560
561 for (i=0;i<=0x0f;i++); /* another wee bit of delay */
562
563 if (WaitTillCardIsFree(base))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564 return -EIO;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800565
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566 if ((status=inw(base+0x4))!=0) {
567 printk(KERN_ERR "ISILoad:Card%d verify got out of sync.Card Status:0x%x\n",card+1, status);
568 return -EIO;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800569 }
570
571 if (copy_to_user(argp, &frame, sizeof(bin_frame)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572 return -EFAULT;
573 return 0;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800574
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575 case MIOCTL_XFER_CTRL:
576 if (!capable(CAP_SYS_ADMIN))
577 return -EPERM;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800578 if (WaitTillCardIsFree(base))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579 return -EIO;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800580
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581 outw(0xf2, base);
582 outw(0x800, base);
583 outw(0x0, base);
584 outw(0x0, base);
585 InterruptTheCard(base);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800586 outw(0x0, base+0x4); /* for ISI4608 cards */
587
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588 isi_card[card].status |= FIRMWARE_LOADED;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800589 return 0;
590
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591 default:
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800592#ifdef ISICOM_DEBUG
593 printk(KERN_DEBUG "ISILoad: Received Ioctl cmd 0x%x.\n", cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594#endif
595 return -ENOIOCTLCMD;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700597}
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800598
Linus Torvalds1da177e2005-04-16 15:20:36 -0700599
600/*
601 * ISICOM Driver specific routines ...
602 *
603 */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800604
605static inline int isicom_paranoia_check(struct isi_port const *port, char *name,
606 const char *routine)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607{
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800608#ifdef ISICOM_DEBUG
609 static const char *badmagic =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700610 KERN_WARNING "ISICOM: Warning: bad isicom magic for dev %s in %s.\n";
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800611 static const char *badport =
612 KERN_WARNING "ISICOM: Warning: NULL isicom port for dev %s in %s.\n";
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613 if (!port) {
614 printk(badport, name, routine);
615 return 1;
616 }
617 if (port->magic != ISICOM_MAGIC) {
618 printk(badmagic, name, routine);
619 return 1;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800620 }
621#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622 return 0;
623}
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800624
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625/*
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800626 * Transmitter.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627 *
628 * We shovel data into the card buffers on a regular basis. The card
629 * will do the rest of the work for us.
630 */
631
632static void isicom_tx(unsigned long _data)
633{
634 short count = (BOARD_COUNT-1), card, base;
635 short txcount, wrd, residue, word_count, cnt;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800636 struct isi_port *port;
637 struct tty_struct *tty;
638
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639#ifdef ISICOM_DEBUG
640 ++tx_count;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800641#endif
642
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643 /* find next active board */
644 card = (prev_card + 1) & 0x0003;
645 while(count-- > 0) {
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800646 if (isi_card[card].status & BOARD_ACTIVE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647 break;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800648 card = (card + 1) & 0x0003;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649 }
650 if (!(isi_card[card].status & BOARD_ACTIVE))
651 goto sched_again;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800652
Linus Torvalds1da177e2005-04-16 15:20:36 -0700653 prev_card = card;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800654
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655 count = isi_card[card].port_count;
656 port = isi_card[card].ports;
657 base = isi_card[card].base;
658 for (;count > 0;count--, port++) {
659 if (!lock_card_at_interrupt(&isi_card[card]))
660 continue;
661 /* port not active or tx disabled to force flow control */
662 if (!(port->flags & ASYNC_INITIALIZED) ||
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800663 !(port->status & ISI_TXOK))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664 unlock_card(&isi_card[card]);
665 continue;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800666
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667 tty = port->tty;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800668
669
670 if (tty == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671 unlock_card(&isi_card[card]);
672 continue;
673 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800674
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675 txcount = min_t(short, TX_SIZE, port->xmit_cnt);
676 if (txcount <= 0 || tty->stopped || tty->hw_stopped) {
677 unlock_card(&isi_card[card]);
678 continue;
679 }
680 if (!(inw(base + 0x02) & (1 << port->channel))) {
681 unlock_card(&isi_card[card]);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800682 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683 }
684#ifdef ISICOM_DEBUG
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800685 printk(KERN_DEBUG "ISICOM: txing %d bytes, port%d.\n",
686 txcount, port->channel+1);
687#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688 outw((port->channel << isi_card[card].shift_count) | txcount
689 , base);
690 residue = NO;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800691 wrd = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692 while (1) {
693 cnt = min_t(int, txcount, (SERIAL_XMIT_SIZE - port->xmit_tail));
694 if (residue == YES) {
695 residue = NO;
696 if (cnt > 0) {
697 wrd |= (port->xmit_buf[port->xmit_tail] << 8);
698 port->xmit_tail = (port->xmit_tail + 1) & (SERIAL_XMIT_SIZE - 1);
699 port->xmit_cnt--;
700 txcount--;
701 cnt--;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800702 outw(wrd, base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700703 }
704 else {
705 outw(wrd, base);
706 break;
707 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800708 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709 if (cnt <= 0) break;
710 word_count = cnt >> 1;
711 outsw(base, port->xmit_buf+port->xmit_tail, word_count);
712 port->xmit_tail = (port->xmit_tail + (word_count << 1)) &
713 (SERIAL_XMIT_SIZE - 1);
714 txcount -= (word_count << 1);
715 port->xmit_cnt -= (word_count << 1);
716 if (cnt & 0x0001) {
717 residue = YES;
718 wrd = port->xmit_buf[port->xmit_tail];
719 port->xmit_tail = (port->xmit_tail + 1) & (SERIAL_XMIT_SIZE - 1);
720 port->xmit_cnt--;
721 txcount--;
722 }
723 }
724
725 InterruptTheCard(base);
726 if (port->xmit_cnt <= 0)
727 port->status &= ~ISI_TXOK;
728 if (port->xmit_cnt <= WAKEUP_CHARS)
729 schedule_work(&port->bh_tqueue);
730 unlock_card(&isi_card[card]);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800731 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700732
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800733 /* schedule another tx for hopefully in about 10ms */
734sched_again:
735 if (!re_schedule)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700736 return;
737 init_timer(&tx);
738 tx.expires = jiffies + HZ/100;
739 tx.data = 0;
740 tx.function = isicom_tx;
741 add_timer(&tx);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800742
743 return;
744}
745
Linus Torvalds1da177e2005-04-16 15:20:36 -0700746/* Interrupt handlers */
747
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800748
749static void isicom_bottomhalf(void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750{
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800751 struct isi_port *port = (struct isi_port *) data;
752 struct tty_struct *tty = port->tty;
753
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754 if (!tty)
755 return;
756
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800757 tty_wakeup(tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700758 wake_up_interruptible(&tty->write_wait);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800759}
760
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761/*
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800762 * Main interrupt handler routine
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763 */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800764
Linus Torvalds1da177e2005-04-16 15:20:36 -0700765static irqreturn_t isicom_interrupt(int irq, void *dev_id,
766 struct pt_regs *regs)
767{
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800768 struct isi_board *card;
769 struct isi_port *port;
770 struct tty_struct *tty;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771 unsigned short base, header, word_count, count;
772 unsigned char channel;
773 short byte_count;
Alan Cox33f0f882006-01-09 20:54:13 -0800774 unsigned char *rp;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800775
Linus Torvalds1da177e2005-04-16 15:20:36 -0700776 card = (struct isi_board *) dev_id;
777
778 if (!card || !(card->status & FIRMWARE_LOADED))
779 return IRQ_NONE;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800780
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781 base = card->base;
782 spin_lock(&card->card_lock);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800783
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784 if (card->isa == NO) {
785 /*
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800786 * disable any interrupts from the PCI card and lower the
787 * interrupt line
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788 */
789 outw(0x8000, base+0x04);
790 ClearInterrupt(base);
791 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800792
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793 inw(base); /* get the dummy word out */
794 header = inw(base);
795 channel = (header & 0x7800) >> card->shift_count;
796 byte_count = header & 0xff;
797
798 if (channel + 1 > card->port_count) {
799 printk(KERN_WARNING "ISICOM: isicom_interrupt(0x%x): %d(channel) > port_count.\n",
800 base, channel+1);
801 if (card->isa)
802 ClearInterrupt(base);
803 else
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800804 outw(0x0000, base+0x04); /* enable interrupts */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805 spin_unlock(&card->card_lock);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800806 return IRQ_HANDLED;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807 }
808 port = card->ports + channel;
809 if (!(port->flags & ASYNC_INITIALIZED)) {
810 if (card->isa)
811 ClearInterrupt(base);
812 else
813 outw(0x0000, base+0x04); /* enable interrupts */
814 return IRQ_HANDLED;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800815 }
816
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817 tty = port->tty;
818 if (tty == NULL) {
819 word_count = byte_count >> 1;
820 while(byte_count > 1) {
821 inw(base);
822 byte_count -= 2;
823 }
824 if (byte_count & 0x01)
825 inw(base);
826 if (card->isa == YES)
827 ClearInterrupt(base);
828 else
829 outw(0x0000, base+0x04); /* enable interrupts */
830 spin_unlock(&card->card_lock);
831 return IRQ_HANDLED;
832 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800833
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834 if (header & 0x8000) { /* Status Packet */
835 header = inw(base);
836 switch(header & 0xff) {
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800837 case 0: /* Change in EIA signals */
838
839 if (port->flags & ASYNC_CHECK_CD) {
840 if (port->status & ISI_DCD) {
841 if (!(header & ISI_DCD)) {
842 /* Carrier has been lost */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843#ifdef ISICOM_DEBUG
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800844 printk(KERN_DEBUG "ISICOM: interrupt: DCD->low.\n");
845#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700846 port->status &= ~ISI_DCD;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800847 schedule_work(&port->hangup_tq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848 }
849 }
850 else {
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800851 if (header & ISI_DCD) {
852 /* Carrier has been detected */
853#ifdef ISICOM_DEBUG
854 printk(KERN_DEBUG "ISICOM: interrupt: DCD->high.\n");
855#endif
856 port->status |= ISI_DCD;
857 wake_up_interruptible(&port->open_wait);
858 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800860 }
861 else {
862 if (header & ISI_DCD)
863 port->status |= ISI_DCD;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864 else
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800865 port->status &= ~ISI_DCD;
866 }
867
868 if (port->flags & ASYNC_CTS_FLOW) {
869 if (port->tty->hw_stopped) {
870 if (header & ISI_CTS) {
871 port->tty->hw_stopped = 0;
872 /* start tx ing */
873 port->status |= (ISI_TXOK | ISI_CTS);
874 schedule_work(&port->bh_tqueue);
875 }
876 }
877 else {
878 if (!(header & ISI_CTS)) {
879 port->tty->hw_stopped = 1;
880 /* stop tx ing */
881 port->status &= ~(ISI_TXOK | ISI_CTS);
882 }
883 }
884 }
885 else {
886 if (header & ISI_CTS)
887 port->status |= ISI_CTS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700888 else
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800889 port->status &= ~ISI_CTS;
890 }
891
892 if (header & ISI_DSR)
893 port->status |= ISI_DSR;
894 else
895 port->status &= ~ISI_DSR;
896
897 if (header & ISI_RI)
898 port->status |= ISI_RI;
899 else
900 port->status &= ~ISI_RI;
901
902 break;
903
904 case 1: /* Received Break !!! */
905 tty_insert_flip_char(tty, 0, TTY_BREAK);
906 if (port->flags & ASYNC_SAK)
907 do_SAK(tty);
908 tty_flip_buffer_push(tty);
909 break;
910
911 case 2: /* Statistics */
912 printk(KERN_DEBUG "ISICOM: isicom_interrupt: stats!!!.\n");
913 break;
914
915 default:
916 printk(KERN_WARNING "ISICOM: Intr: Unknown code in status packet.\n");
917 break;
918 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700919 }
920 else { /* Data Packet */
Alan Cox33f0f882006-01-09 20:54:13 -0800921
922 count = tty_prepare_flip_string(tty, &rp, byte_count & ~1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923#ifdef ISICOM_DEBUG
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800924 printk(KERN_DEBUG "ISICOM: Intr: Can rx %d of %d bytes.\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700925 count, byte_count);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800926#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700927 word_count = count >> 1;
Alan Cox33f0f882006-01-09 20:54:13 -0800928 insw(base, rp, word_count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929 byte_count -= (word_count << 1);
930 if (count & 0x0001) {
Alan Cox33f0f882006-01-09 20:54:13 -0800931 tty_insert_flip_char(tty, inw(base) & 0xff, TTY_NORMAL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700932 byte_count -= 2;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800933 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700934 if (byte_count > 0) {
935 printk(KERN_DEBUG "ISICOM: Intr(0x%x:%d): Flip buffer overflow! dropping bytes...\n",
936 base, channel+1);
937 while(byte_count > 0) { /* drain out unread xtra data */
938 inw(base);
939 byte_count -= 2;
940 }
941 }
Alan Cox33f0f882006-01-09 20:54:13 -0800942 tty_flip_buffer_push(tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943 }
944 if (card->isa == YES)
945 ClearInterrupt(base);
946 else
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800947 outw(0x0000, base+0x04); /* enable interrupts */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700948 return IRQ_HANDLED;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800949}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700950
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800951static void isicom_config_port(struct isi_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700952{
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800953 struct isi_board *card = port->card;
954 struct tty_struct *tty;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955 unsigned long baud;
956 unsigned short channel_setup, base = card->base;
957 unsigned short channel = port->channel, shift_count = card->shift_count;
958 unsigned char flow_ctrl;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800959
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960 if (!(tty = port->tty) || !tty->termios)
961 return;
962 baud = C_BAUD(tty);
963 if (baud & CBAUDEX) {
964 baud &= ~CBAUDEX;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800965
Linus Torvalds1da177e2005-04-16 15:20:36 -0700966 /* if CBAUDEX bit is on and the baud is set to either 50 or 75
967 * then the card is programmed for 57.6Kbps or 115Kbps
968 * respectively.
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800969 */
970
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971 if (baud < 1 || baud > 2)
972 port->tty->termios->c_cflag &= ~CBAUDEX;
973 else
974 baud += 15;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800975 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700976 if (baud == 15) {
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800977
978 /* the ASYNC_SPD_HI and ASYNC_SPD_VHI options are set
Linus Torvalds1da177e2005-04-16 15:20:36 -0700979 * by the set_serial_info ioctl ... this is done by
980 * the 'setserial' utility.
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800981 */
982
Linus Torvalds1da177e2005-04-16 15:20:36 -0700983 if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800984 baud++; /* 57.6 Kbps */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700985 if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800986 baud +=2; /* 115 Kbps */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700987 }
988 if (linuxb_to_isib[baud] == -1) {
989 /* hang up */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800990 drop_dtr(port);
991 return;
992 }
993 else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994 raise_dtr(port);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800995
Linus Torvalds1da177e2005-04-16 15:20:36 -0700996 if (lock_card(card)) {
997 outw(0x8000 | (channel << shift_count) |0x03, base);
998 outw(linuxb_to_isib[baud] << 8 | 0x03, base);
999 channel_setup = 0;
1000 switch(C_CSIZE(tty)) {
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001001 case CS5:
1002 channel_setup |= ISICOM_CS5;
1003 break;
1004 case CS6:
1005 channel_setup |= ISICOM_CS6;
1006 break;
1007 case CS7:
1008 channel_setup |= ISICOM_CS7;
1009 break;
1010 case CS8:
1011 channel_setup |= ISICOM_CS8;
1012 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001013 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001014
Linus Torvalds1da177e2005-04-16 15:20:36 -07001015 if (C_CSTOPB(tty))
1016 channel_setup |= ISICOM_2SB;
1017 if (C_PARENB(tty)) {
1018 channel_setup |= ISICOM_EVPAR;
1019 if (C_PARODD(tty))
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001020 channel_setup |= ISICOM_ODPAR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001021 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001022 outw(channel_setup, base);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023 InterruptTheCard(base);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001024 unlock_card(card);
1025 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001026 if (C_CLOCAL(tty))
1027 port->flags &= ~ASYNC_CHECK_CD;
1028 else
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001029 port->flags |= ASYNC_CHECK_CD;
1030
Linus Torvalds1da177e2005-04-16 15:20:36 -07001031 /* flow control settings ...*/
1032 flow_ctrl = 0;
1033 port->flags &= ~ASYNC_CTS_FLOW;
1034 if (C_CRTSCTS(tty)) {
1035 port->flags |= ASYNC_CTS_FLOW;
1036 flow_ctrl |= ISICOM_CTSRTS;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001037 }
1038 if (I_IXON(tty))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001039 flow_ctrl |= ISICOM_RESPOND_XONXOFF;
1040 if (I_IXOFF(tty))
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001041 flow_ctrl |= ISICOM_INITIATE_XONXOFF;
1042
Linus Torvalds1da177e2005-04-16 15:20:36 -07001043 if (lock_card(card)) {
1044 outw(0x8000 | (channel << shift_count) |0x04, base);
1045 outw(flow_ctrl << 8 | 0x05, base);
1046 outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base);
1047 InterruptTheCard(base);
1048 unlock_card(card);
1049 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001050
Linus Torvalds1da177e2005-04-16 15:20:36 -07001051 /* rx enabled -> enable port for rx on the card */
1052 if (C_CREAD(tty)) {
1053 card->port_status |= (1 << channel);
1054 outw(card->port_status, base + 0x02);
1055 }
1056}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001057
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001058/* open et all */
1059
1060static inline void isicom_setup_board(struct isi_board *bp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001061{
1062 int channel;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001063 struct isi_port *port;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001064 unsigned long flags;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001065
Linus Torvalds1da177e2005-04-16 15:20:36 -07001066 spin_lock_irqsave(&bp->card_lock, flags);
1067 if (bp->status & BOARD_ACTIVE) {
1068 spin_unlock_irqrestore(&bp->card_lock, flags);
1069 return;
1070 }
1071 port = bp->ports;
1072 bp->status |= BOARD_ACTIVE;
1073 spin_unlock_irqrestore(&bp->card_lock, flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001074 for (channel = 0; channel < bp->port_count; channel++, port++)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001075 drop_dtr_rts(port);
1076 return;
1077}
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001078
1079static int isicom_setup_port(struct isi_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001080{
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001081 struct isi_board *card = port->card;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001082 unsigned long flags;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001083
Linus Torvalds1da177e2005-04-16 15:20:36 -07001084 if (port->flags & ASYNC_INITIALIZED) {
1085 return 0;
1086 }
1087 if (!port->xmit_buf) {
1088 unsigned long page;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001089
Linus Torvalds1da177e2005-04-16 15:20:36 -07001090 if (!(page = get_zeroed_page(GFP_KERNEL)))
1091 return -ENOMEM;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001092
Linus Torvalds1da177e2005-04-16 15:20:36 -07001093 if (port->xmit_buf) {
1094 free_page(page);
1095 return -ERESTARTSYS;
1096 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001097 port->xmit_buf = (unsigned char *) page;
1098 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001099
1100 spin_lock_irqsave(&card->card_lock, flags);
1101 if (port->tty)
1102 clear_bit(TTY_IO_ERROR, &port->tty->flags);
1103 if (port->count == 1)
1104 card->count++;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001105
Linus Torvalds1da177e2005-04-16 15:20:36 -07001106 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001107
Linus Torvalds1da177e2005-04-16 15:20:36 -07001108 /* discard any residual data */
1109 kill_queue(port, ISICOM_KILLTX | ISICOM_KILLRX);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001110
Linus Torvalds1da177e2005-04-16 15:20:36 -07001111 isicom_config_port(port);
1112 port->flags |= ASYNC_INITIALIZED;
1113 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001114
1115 return 0;
1116}
1117
1118static int block_til_ready(struct tty_struct *tty, struct file *filp, struct isi_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001119{
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001120 struct isi_board *card = port->card;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001121 int do_clocal = 0, retval;
1122 unsigned long flags;
1123 DECLARE_WAITQUEUE(wait, current);
1124
1125 /* block if port is in the process of being closed */
1126
1127 if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) {
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001128#ifdef ISICOM_DEBUG
Linus Torvalds1da177e2005-04-16 15:20:36 -07001129 printk(KERN_DEBUG "ISICOM: block_til_ready: close in progress.\n");
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001130#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001131 interruptible_sleep_on(&port->close_wait);
1132 if (port->flags & ASYNC_HUP_NOTIFY)
1133 return -EAGAIN;
1134 else
1135 return -ERESTARTSYS;
1136 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001137
Linus Torvalds1da177e2005-04-16 15:20:36 -07001138 /* if non-blocking mode is set ... */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001139
Linus Torvalds1da177e2005-04-16 15:20:36 -07001140 if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001141#ifdef ISICOM_DEBUG
Linus Torvalds1da177e2005-04-16 15:20:36 -07001142 printk(KERN_DEBUG "ISICOM: block_til_ready: non-block mode.\n");
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001143#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001144 port->flags |= ASYNC_NORMAL_ACTIVE;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001145 return 0;
1146 }
1147
Linus Torvalds1da177e2005-04-16 15:20:36 -07001148 if (C_CLOCAL(tty))
1149 do_clocal = 1;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001150
1151 /* block waiting for DCD to be asserted, and while
Linus Torvalds1da177e2005-04-16 15:20:36 -07001152 callout dev is busy */
1153 retval = 0;
1154 add_wait_queue(&port->open_wait, &wait);
1155
1156 spin_lock_irqsave(&card->card_lock, flags);
1157 if (!tty_hung_up_p(filp))
1158 port->count--;
1159 port->blocked_open++;
1160 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001161
Linus Torvalds1da177e2005-04-16 15:20:36 -07001162 while (1) {
1163 raise_dtr_rts(port);
1164
1165 set_current_state(TASK_INTERRUPTIBLE);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001166 if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001167 if (port->flags & ASYNC_HUP_NOTIFY)
1168 retval = -EAGAIN;
1169 else
1170 retval = -ERESTARTSYS;
1171 break;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001172 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001173 if (!(port->flags & ASYNC_CLOSING) &&
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001174 (do_clocal || (port->status & ISI_DCD))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001175 break;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001176 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001177 if (signal_pending(current)) {
1178 retval = -ERESTARTSYS;
1179 break;
1180 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001181 schedule();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001182 }
1183 set_current_state(TASK_RUNNING);
1184 remove_wait_queue(&port->open_wait, &wait);
1185 spin_lock_irqsave(&card->card_lock, flags);
1186 if (!tty_hung_up_p(filp))
1187 port->count++;
1188 port->blocked_open--;
1189 spin_unlock_irqrestore(&card->card_lock, flags);
1190 if (retval)
1191 return retval;
1192 port->flags |= ASYNC_NORMAL_ACTIVE;
1193 return 0;
1194}
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001195
1196static int isicom_open(struct tty_struct *tty, struct file *filp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001197{
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001198 struct isi_port *port;
1199 struct isi_board *card;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001200 unsigned int line, board;
1201 int error;
1202
1203 line = tty->index;
1204 if (line < 0 || line > PORT_COUNT-1)
1205 return -ENODEV;
1206 board = BOARD(line);
1207 card = &isi_card[board];
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001208
Linus Torvalds1da177e2005-04-16 15:20:36 -07001209 if (!(card->status & FIRMWARE_LOADED))
1210 return -ENODEV;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001211
Linus Torvalds1da177e2005-04-16 15:20:36 -07001212 /* open on a port greater than the port count for the card !!! */
1213 if (line > ((board * 16) + card->port_count - 1))
1214 return -ENODEV;
1215
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001216 port = &isi_ports[line];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001217 if (isicom_paranoia_check(port, tty->name, "isicom_open"))
1218 return -ENODEV;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001219
1220 isicom_setup_board(card);
1221
Linus Torvalds1da177e2005-04-16 15:20:36 -07001222 port->count++;
1223 tty->driver_data = port;
1224 port->tty = tty;
1225 if ((error = isicom_setup_port(port))!=0)
1226 return error;
1227 if ((error = block_til_ready(tty, filp, port))!=0)
1228 return error;
1229
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001230 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001231}
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001232
Linus Torvalds1da177e2005-04-16 15:20:36 -07001233/* close et all */
1234
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001235static inline void isicom_shutdown_board(struct isi_board *bp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001236{
1237 unsigned long flags;
1238
1239 spin_lock_irqsave(&bp->card_lock, flags);
1240 if (bp->status & BOARD_ACTIVE) {
1241 bp->status &= ~BOARD_ACTIVE;
1242 }
1243 spin_unlock_irqrestore(&bp->card_lock, flags);
1244}
1245
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001246static void isicom_shutdown_port(struct isi_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001247{
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001248 struct isi_board *card = port->card;
1249 struct tty_struct *tty;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001250 unsigned long flags;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001251
Linus Torvalds1da177e2005-04-16 15:20:36 -07001252 tty = port->tty;
1253
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001254 spin_lock_irqsave(&card->card_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001255 if (!(port->flags & ASYNC_INITIALIZED)) {
1256 spin_unlock_irqrestore(&card->card_lock, flags);
1257 return;
1258 }
1259 if (port->xmit_buf) {
1260 free_page((unsigned long) port->xmit_buf);
1261 port->xmit_buf = NULL;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001262 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001263 port->flags &= ~ASYNC_INITIALIZED;
1264 /* 3rd October 2000 : Vinayak P Risbud */
1265 port->tty = NULL;
1266 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001267
Linus Torvalds1da177e2005-04-16 15:20:36 -07001268 /*Fix done by Anil .S on 30-04-2001
1269 remote login through isi port has dtr toggle problem
1270 due to which the carrier drops before the password prompt
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001271 appears on the remote end. Now we drop the dtr only if the
Linus Torvalds1da177e2005-04-16 15:20:36 -07001272 HUPCL(Hangup on close) flag is set for the tty*/
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001273
1274 if (C_HUPCL(tty))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001275 /* drop dtr on this port */
1276 drop_dtr(port);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001277
1278 /* any other port uninits */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001279 if (tty)
1280 set_bit(TTY_IO_ERROR, &tty->flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001281
Linus Torvalds1da177e2005-04-16 15:20:36 -07001282 if (--card->count < 0) {
1283 printk(KERN_DEBUG "ISICOM: isicom_shutdown_port: bad board(0x%x) count %d.\n",
1284 card->base, card->count);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001285 card->count = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001286 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001287
Linus Torvalds1da177e2005-04-16 15:20:36 -07001288 /* last port was closed , shutdown that boad too */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001289 if (C_HUPCL(tty)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001290 if (!card->count)
1291 isicom_shutdown_board(card);
1292 }
1293}
1294
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001295static void isicom_close(struct tty_struct *tty, struct file *filp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001296{
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001297 struct isi_port *port = (struct isi_port *) tty->driver_data;
1298 struct isi_board *card = port->card;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001299 unsigned long flags;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001300
Linus Torvalds1da177e2005-04-16 15:20:36 -07001301 if (!port)
1302 return;
1303 if (isicom_paranoia_check(port, tty->name, "isicom_close"))
1304 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001305
1306#ifdef ISICOM_DEBUG
Linus Torvalds1da177e2005-04-16 15:20:36 -07001307 printk(KERN_DEBUG "ISICOM: Close start!!!.\n");
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001308#endif
1309
Linus Torvalds1da177e2005-04-16 15:20:36 -07001310 spin_lock_irqsave(&card->card_lock, flags);
1311 if (tty_hung_up_p(filp)) {
1312 spin_unlock_irqrestore(&card->card_lock, flags);
1313 return;
1314 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001315
Linus Torvalds1da177e2005-04-16 15:20:36 -07001316 if (tty->count == 1 && port->count != 1) {
1317 printk(KERN_WARNING "ISICOM:(0x%x) isicom_close: bad port count"
1318 "tty->count = 1 port count = %d.\n",
1319 card->base, port->count);
1320 port->count = 1;
1321 }
1322 if (--port->count < 0) {
1323 printk(KERN_WARNING "ISICOM:(0x%x) isicom_close: bad port count for"
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001324 "channel%d = %d", card->base, port->channel,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001325 port->count);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001326 port->count = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001327 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001328
Linus Torvalds1da177e2005-04-16 15:20:36 -07001329 if (port->count) {
1330 spin_unlock_irqrestore(&card->card_lock, flags);
1331 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001332 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001333 port->flags |= ASYNC_CLOSING;
1334 tty->closing = 1;
1335 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001336
Linus Torvalds1da177e2005-04-16 15:20:36 -07001337 if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1338 tty_wait_until_sent(tty, port->closing_wait);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001339 /* indicate to the card that no more data can be received
Linus Torvalds1da177e2005-04-16 15:20:36 -07001340 on this port */
1341 spin_lock_irqsave(&card->card_lock, flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001342 if (port->flags & ASYNC_INITIALIZED) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001343 card->port_status &= ~(1 << port->channel);
1344 outw(card->port_status, card->base + 0x02);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001345 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001346 isicom_shutdown_port(port);
1347 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001348
Linus Torvalds1da177e2005-04-16 15:20:36 -07001349 if (tty->driver->flush_buffer)
1350 tty->driver->flush_buffer(tty);
1351 tty_ldisc_flush(tty);
1352
1353 spin_lock_irqsave(&card->card_lock, flags);
1354 tty->closing = 0;
1355
1356 if (port->blocked_open) {
1357 spin_unlock_irqrestore(&card->card_lock, flags);
1358 if (port->close_delay) {
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001359#ifdef ISICOM_DEBUG
Linus Torvalds1da177e2005-04-16 15:20:36 -07001360 printk(KERN_DEBUG "ISICOM: scheduling until time out.\n");
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001361#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001362 msleep_interruptible(jiffies_to_msecs(port->close_delay));
1363 }
1364 spin_lock_irqsave(&card->card_lock, flags);
1365 wake_up_interruptible(&port->open_wait);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001366 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001367 port->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1368 wake_up_interruptible(&port->close_wait);
1369 spin_unlock_irqrestore(&card->card_lock, flags);
1370}
1371
1372/* write et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001373static int isicom_write(struct tty_struct *tty, const unsigned char *buf,
1374 int count)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001375{
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001376 struct isi_port *port = (struct isi_port *) tty->driver_data;
1377 struct isi_board *card = port->card;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001378 unsigned long flags;
1379 int cnt, total = 0;
1380
1381 if (isicom_paranoia_check(port, tty->name, "isicom_write"))
1382 return 0;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001383
Linus Torvalds1da177e2005-04-16 15:20:36 -07001384 if (!tty || !port->xmit_buf || !tmp_buf)
1385 return 0;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001386
Linus Torvalds1da177e2005-04-16 15:20:36 -07001387 spin_lock_irqsave(&card->card_lock, flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001388
1389 while(1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001390 cnt = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt - 1,
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001391 SERIAL_XMIT_SIZE - port->xmit_head));
1392 if (cnt <= 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001393 break;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001394
Linus Torvalds1da177e2005-04-16 15:20:36 -07001395 memcpy(port->xmit_buf + port->xmit_head, buf, cnt);
1396 port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE - 1);
1397 port->xmit_cnt += cnt;
1398 buf += cnt;
1399 count -= cnt;
1400 total += cnt;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001401 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001402 if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped)
1403 port->status |= ISI_TXOK;
1404 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001405 return total;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001406}
1407
1408/* put_char et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001409static void isicom_put_char(struct tty_struct *tty, unsigned char ch)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001410{
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001411 struct isi_port *port = (struct isi_port *) tty->driver_data;
1412 struct isi_board *card = port->card;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001413 unsigned long flags;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001414
Linus Torvalds1da177e2005-04-16 15:20:36 -07001415 if (isicom_paranoia_check(port, tty->name, "isicom_put_char"))
1416 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001417
Linus Torvalds1da177e2005-04-16 15:20:36 -07001418 if (!tty || !port->xmit_buf)
1419 return;
1420
1421 spin_lock_irqsave(&card->card_lock, flags);
1422 if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
1423 spin_unlock_irqrestore(&card->card_lock, flags);
1424 return;
1425 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001426
Linus Torvalds1da177e2005-04-16 15:20:36 -07001427 port->xmit_buf[port->xmit_head++] = ch;
1428 port->xmit_head &= (SERIAL_XMIT_SIZE - 1);
1429 port->xmit_cnt++;
1430 spin_unlock_irqrestore(&card->card_lock, flags);
1431}
1432
1433/* flush_chars et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001434static void isicom_flush_chars(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001435{
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001436 struct isi_port *port = (struct isi_port *) tty->driver_data;
1437
Linus Torvalds1da177e2005-04-16 15:20:36 -07001438 if (isicom_paranoia_check(port, tty->name, "isicom_flush_chars"))
1439 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001440
Linus Torvalds1da177e2005-04-16 15:20:36 -07001441 if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped || !port->xmit_buf)
1442 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001443
Linus Torvalds1da177e2005-04-16 15:20:36 -07001444 /* this tells the transmitter to consider this port for
1445 data output to the card ... that's the best we can do. */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001446 port->status |= ISI_TXOK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001447}
1448
1449/* write_room et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001450static int isicom_write_room(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001451{
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001452 struct isi_port *port = (struct isi_port *) tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001453 int free;
1454
1455 if (isicom_paranoia_check(port, tty->name, "isicom_write_room"))
1456 return 0;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001457
Linus Torvalds1da177e2005-04-16 15:20:36 -07001458 free = SERIAL_XMIT_SIZE - port->xmit_cnt - 1;
1459 if (free < 0)
1460 free = 0;
1461 return free;
1462}
1463
1464/* chars_in_buffer et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001465static int isicom_chars_in_buffer(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001466{
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001467 struct isi_port *port = (struct isi_port *) tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001468 if (isicom_paranoia_check(port, tty->name, "isicom_chars_in_buffer"))
1469 return 0;
1470 return port->xmit_cnt;
1471}
1472
1473/* ioctl et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001474static inline void isicom_send_break(struct isi_port *port, unsigned long length)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001475{
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001476 struct isi_board *card = port->card;
1477 unsigned short base = card->base;
1478
1479 if (!lock_card(card))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001480 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001481
Linus Torvalds1da177e2005-04-16 15:20:36 -07001482 outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base);
1483 outw((length & 0xff) << 8 | 0x00, base);
1484 outw((length & 0xff00), base);
1485 InterruptTheCard(base);
1486
1487 unlock_card(card);
1488}
1489
1490static int isicom_tiocmget(struct tty_struct *tty, struct file *file)
1491{
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001492 struct isi_port *port = (struct isi_port *) tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001493 /* just send the port status */
1494 unsigned short status = port->status;
1495
1496 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1497 return -ENODEV;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001498
Linus Torvalds1da177e2005-04-16 15:20:36 -07001499 return ((status & ISI_RTS) ? TIOCM_RTS : 0) |
1500 ((status & ISI_DTR) ? TIOCM_DTR : 0) |
1501 ((status & ISI_DCD) ? TIOCM_CAR : 0) |
1502 ((status & ISI_DSR) ? TIOCM_DSR : 0) |
1503 ((status & ISI_CTS) ? TIOCM_CTS : 0) |
1504 ((status & ISI_RI ) ? TIOCM_RI : 0);
1505}
1506
1507static int isicom_tiocmset(struct tty_struct *tty, struct file *file,
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001508 unsigned int set, unsigned int clear)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001509{
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001510 struct isi_port *port = (struct isi_port *) tty->driver_data;
1511
Linus Torvalds1da177e2005-04-16 15:20:36 -07001512 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1513 return -ENODEV;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001514
Linus Torvalds1da177e2005-04-16 15:20:36 -07001515 if (set & TIOCM_RTS)
1516 raise_rts(port);
1517 if (set & TIOCM_DTR)
1518 raise_dtr(port);
1519
1520 if (clear & TIOCM_RTS)
1521 drop_rts(port);
1522 if (clear & TIOCM_DTR)
1523 drop_dtr(port);
1524
1525 return 0;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001526}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001527
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001528static int isicom_set_serial_info(struct isi_port *port,
1529 struct serial_struct __user *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001530{
1531 struct serial_struct newinfo;
1532 int reconfig_port;
1533
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001534 if (copy_from_user(&newinfo, info, sizeof(newinfo)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001535 return -EFAULT;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001536
1537 reconfig_port = ((port->flags & ASYNC_SPD_MASK) !=
1538 (newinfo.flags & ASYNC_SPD_MASK));
1539
Linus Torvalds1da177e2005-04-16 15:20:36 -07001540 if (!capable(CAP_SYS_ADMIN)) {
1541 if ((newinfo.close_delay != port->close_delay) ||
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001542 (newinfo.closing_wait != port->closing_wait) ||
1543 ((newinfo.flags & ~ASYNC_USR_MASK) !=
1544 (port->flags & ~ASYNC_USR_MASK)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001545 return -EPERM;
1546 port->flags = ((port->flags & ~ ASYNC_USR_MASK) |
1547 (newinfo.flags & ASYNC_USR_MASK));
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001548 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001549 else {
1550 port->close_delay = newinfo.close_delay;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001551 port->closing_wait = newinfo.closing_wait;
1552 port->flags = ((port->flags & ~ASYNC_FLAGS) |
Linus Torvalds1da177e2005-04-16 15:20:36 -07001553 (newinfo.flags & ASYNC_FLAGS));
1554 }
1555 if (reconfig_port) {
1556 isicom_config_port(port);
1557 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001558 return 0;
1559}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001560
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001561static int isicom_get_serial_info(struct isi_port *port,
1562 struct serial_struct __user *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001563{
1564 struct serial_struct out_info;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001565
Linus Torvalds1da177e2005-04-16 15:20:36 -07001566 memset(&out_info, 0, sizeof(out_info));
1567/* out_info.type = ? */
1568 out_info.line = port - isi_ports;
1569 out_info.port = port->card->base;
1570 out_info.irq = port->card->irq;
1571 out_info.flags = port->flags;
1572/* out_info.baud_base = ? */
1573 out_info.close_delay = port->close_delay;
1574 out_info.closing_wait = port->closing_wait;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001575 if (copy_to_user(info, &out_info, sizeof(out_info)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001576 return -EFAULT;
1577 return 0;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001578}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001579
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001580static int isicom_ioctl(struct tty_struct *tty, struct file *filp,
1581 unsigned int cmd, unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001582{
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001583 struct isi_port *port = (struct isi_port *) tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001584 void __user *argp = (void __user *)arg;
1585 int retval;
1586
1587 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1588 return -ENODEV;
1589
1590 switch(cmd) {
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001591 case TCSBRK:
1592 retval = tty_check_change(tty);
1593 if (retval)
1594 return retval;
1595 tty_wait_until_sent(tty, 0);
1596 if (!arg)
1597 isicom_send_break(port, HZ/4);
1598 return 0;
1599
1600 case TCSBRKP:
1601 retval = tty_check_change(tty);
1602 if (retval)
1603 return retval;
1604 tty_wait_until_sent(tty, 0);
1605 isicom_send_break(port, arg ? arg * (HZ/10) : HZ/4);
1606 return 0;
1607
1608 case TIOCGSOFTCAR:
1609 return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *)argp);
1610
1611 case TIOCSSOFTCAR:
1612 if (get_user(arg, (unsigned long __user *) argp))
1613 return -EFAULT;
1614 tty->termios->c_cflag =
1615 ((tty->termios->c_cflag & ~CLOCAL) |
1616 (arg ? CLOCAL : 0));
1617 return 0;
1618
1619 case TIOCGSERIAL:
1620 return isicom_get_serial_info(port, argp);
1621
1622 case TIOCSSERIAL:
1623 return isicom_set_serial_info(port, argp);
1624
1625 default:
1626 return -ENOIOCTLCMD;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001627 }
1628 return 0;
1629}
1630
1631/* set_termios et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001632static void isicom_set_termios(struct tty_struct *tty,
1633 struct termios *old_termios)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001634{
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001635 struct isi_port *port = (struct isi_port *) tty->driver_data;
1636
Linus Torvalds1da177e2005-04-16 15:20:36 -07001637 if (isicom_paranoia_check(port, tty->name, "isicom_set_termios"))
1638 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001639
Linus Torvalds1da177e2005-04-16 15:20:36 -07001640 if (tty->termios->c_cflag == old_termios->c_cflag &&
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001641 tty->termios->c_iflag == old_termios->c_iflag)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001642 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001643
Linus Torvalds1da177e2005-04-16 15:20:36 -07001644 isicom_config_port(port);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001645
Linus Torvalds1da177e2005-04-16 15:20:36 -07001646 if ((old_termios->c_cflag & CRTSCTS) &&
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001647 !(tty->termios->c_cflag & CRTSCTS)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001648 tty->hw_stopped = 0;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001649 isicom_start(tty);
1650 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001651}
1652
1653/* throttle et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001654static void isicom_throttle(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001655{
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001656 struct isi_port *port = (struct isi_port *) tty->driver_data;
1657 struct isi_board *card = port->card;
1658
Linus Torvalds1da177e2005-04-16 15:20:36 -07001659 if (isicom_paranoia_check(port, tty->name, "isicom_throttle"))
1660 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001661
Linus Torvalds1da177e2005-04-16 15:20:36 -07001662 /* tell the card that this port cannot handle any more data for now */
1663 card->port_status &= ~(1 << port->channel);
1664 outw(card->port_status, card->base + 0x02);
1665}
1666
1667/* unthrottle et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001668static void isicom_unthrottle(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001669{
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001670 struct isi_port *port = (struct isi_port *) tty->driver_data;
1671 struct isi_board *card = port->card;
1672
Linus Torvalds1da177e2005-04-16 15:20:36 -07001673 if (isicom_paranoia_check(port, tty->name, "isicom_unthrottle"))
1674 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001675
Linus Torvalds1da177e2005-04-16 15:20:36 -07001676 /* tell the card that this port is ready to accept more data */
1677 card->port_status |= (1 << port->channel);
1678 outw(card->port_status, card->base + 0x02);
1679}
1680
1681/* stop et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001682static void isicom_stop(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001683{
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001684 struct isi_port *port = (struct isi_port *) tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001685
1686 if (isicom_paranoia_check(port, tty->name, "isicom_stop"))
1687 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001688
Linus Torvalds1da177e2005-04-16 15:20:36 -07001689 /* this tells the transmitter not to consider this port for
1690 data output to the card. */
1691 port->status &= ~ISI_TXOK;
1692}
1693
1694/* start et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001695static void isicom_start(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001696{
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001697 struct isi_port *port = (struct isi_port *) tty->driver_data;
1698
Linus Torvalds1da177e2005-04-16 15:20:36 -07001699 if (isicom_paranoia_check(port, tty->name, "isicom_start"))
1700 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001701
Linus Torvalds1da177e2005-04-16 15:20:36 -07001702 /* this tells the transmitter to consider this port for
1703 data output to the card. */
1704 port->status |= ISI_TXOK;
1705}
1706
1707/* hangup et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001708static void do_isicom_hangup(void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001709{
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001710 struct isi_port *port = (struct isi_port *) data;
1711 struct tty_struct *tty;
1712
Linus Torvalds1da177e2005-04-16 15:20:36 -07001713 tty = port->tty;
1714 if (tty)
1715 tty_hangup(tty);
1716}
1717
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001718static void isicom_hangup(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001719{
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001720 struct isi_port *port = (struct isi_port *) tty->driver_data;
1721
Linus Torvalds1da177e2005-04-16 15:20:36 -07001722 if (isicom_paranoia_check(port, tty->name, "isicom_hangup"))
1723 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001724
Linus Torvalds1da177e2005-04-16 15:20:36 -07001725 isicom_shutdown_port(port);
1726 port->count = 0;
1727 port->flags &= ~ASYNC_NORMAL_ACTIVE;
1728 port->tty = NULL;
1729 wake_up_interruptible(&port->open_wait);
1730}
1731
1732/* flush_buffer et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001733static void isicom_flush_buffer(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001734{
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001735 struct isi_port *port = (struct isi_port *) tty->driver_data;
1736 struct isi_board *card = port->card;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001737 unsigned long flags;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001738
Linus Torvalds1da177e2005-04-16 15:20:36 -07001739 if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer"))
1740 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001741
Linus Torvalds1da177e2005-04-16 15:20:36 -07001742 spin_lock_irqsave(&card->card_lock, flags);
1743 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
1744 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001745
Linus Torvalds1da177e2005-04-16 15:20:36 -07001746 wake_up_interruptible(&tty->write_wait);
1747 tty_wakeup(tty);
1748}
1749
1750
Adrian Bunk4b849722005-06-25 14:58:52 -07001751static int __devinit register_ioregion(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001752{
1753 int count, done=0;
1754 for (count=0; count < BOARD_COUNT; count++ ) {
1755 if (isi_card[count].base)
1756 if (!request_region(isi_card[count].base,16,ISICOM_NAME)) {
1757 printk(KERN_DEBUG "ISICOM: I/O Region 0x%x-0x%x is busy. Card%d will be disabled.\n",
1758 isi_card[count].base,isi_card[count].base+15,count+1);
1759 isi_card[count].base=0;
1760 done++;
1761 }
1762 }
1763 return done;
1764}
1765
Adrian Bunk4b849722005-06-25 14:58:52 -07001766static void unregister_ioregion(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001767{
1768 int count;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001769 for (count=0; count < BOARD_COUNT; count++ )
Linus Torvalds1da177e2005-04-16 15:20:36 -07001770 if (isi_card[count].base) {
1771 release_region(isi_card[count].base,16);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001772#ifdef ISICOM_DEBUG
Linus Torvalds1da177e2005-04-16 15:20:36 -07001773 printk(KERN_DEBUG "ISICOM: I/O Region 0x%x-0x%x released for Card%d.\n",isi_card[count].base,isi_card[count].base+15,count+1);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001774#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001775 }
1776}
1777
1778static struct tty_operations isicom_ops = {
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001779 .open = isicom_open,
1780 .close = isicom_close,
1781 .write = isicom_write,
1782 .put_char = isicom_put_char,
1783 .flush_chars = isicom_flush_chars,
1784 .write_room = isicom_write_room,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001785 .chars_in_buffer = isicom_chars_in_buffer,
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001786 .ioctl = isicom_ioctl,
1787 .set_termios = isicom_set_termios,
1788 .throttle = isicom_throttle,
1789 .unthrottle = isicom_unthrottle,
1790 .stop = isicom_stop,
1791 .start = isicom_start,
1792 .hangup = isicom_hangup,
1793 .flush_buffer = isicom_flush_buffer,
1794 .tiocmget = isicom_tiocmget,
1795 .tiocmset = isicom_tiocmset,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001796};
1797
Adrian Bunk4b849722005-06-25 14:58:52 -07001798static int __devinit register_drivers(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001799{
1800 int error;
1801
1802 /* tty driver structure initialization */
1803 isicom_normal = alloc_tty_driver(PORT_COUNT);
1804 if (!isicom_normal)
1805 return -ENOMEM;
1806
1807 isicom_normal->owner = THIS_MODULE;
1808 isicom_normal->name = "ttyM";
1809 isicom_normal->devfs_name = "isicom/";
1810 isicom_normal->major = ISICOM_NMAJOR;
1811 isicom_normal->minor_start = 0;
1812 isicom_normal->type = TTY_DRIVER_TYPE_SERIAL;
1813 isicom_normal->subtype = SERIAL_TYPE_NORMAL;
1814 isicom_normal->init_termios = tty_std_termios;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001815 isicom_normal->init_termios.c_cflag =
Linus Torvalds1da177e2005-04-16 15:20:36 -07001816 B9600 | CS8 | CREAD | HUPCL |CLOCAL;
1817 isicom_normal->flags = TTY_DRIVER_REAL_RAW;
1818 tty_set_operations(isicom_normal, &isicom_ops);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001819
Linus Torvalds1da177e2005-04-16 15:20:36 -07001820 if ((error=tty_register_driver(isicom_normal))!=0) {
1821 printk(KERN_DEBUG "ISICOM: Couldn't register the dialin driver, error=%d\n",
1822 error);
1823 put_tty_driver(isicom_normal);
1824 return error;
1825 }
1826 return 0;
1827}
1828
Adrian Bunk4b849722005-06-25 14:58:52 -07001829static void unregister_drivers(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001830{
1831 int error = tty_unregister_driver(isicom_normal);
1832 if (error)
1833 printk(KERN_DEBUG "ISICOM: couldn't unregister normal driver error=%d.\n",error);
1834 put_tty_driver(isicom_normal);
1835}
1836
Adrian Bunk4b849722005-06-25 14:58:52 -07001837static int __devinit register_isr(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001838{
1839 int count, done=0;
1840 unsigned long irqflags;
1841
1842 for (count=0; count < BOARD_COUNT; count++ ) {
1843 if (isi_card[count].base) {
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001844 irqflags = (isi_card[count].isa == YES) ?
1845 SA_INTERRUPT :
Linus Torvalds1da177e2005-04-16 15:20:36 -07001846 (SA_INTERRUPT | SA_SHIRQ);
1847
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001848 if (request_irq(isi_card[count].irq,
1849 isicom_interrupt,
1850 irqflags,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001851 ISICOM_NAME, &isi_card[count])) {
1852
1853 printk(KERN_WARNING "ISICOM: Could not"
1854 " install handler at Irq %d."
1855 " Card%d will be disabled.\n",
1856 isi_card[count].irq, count+1);
1857
1858 release_region(isi_card[count].base,16);
1859 isi_card[count].base=0;
1860 }
1861 else
1862 done++;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001863 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001864 }
1865 return done;
1866}
1867
1868static void __exit unregister_isr(void)
1869{
1870 int count;
1871
1872 for (count=0; count < BOARD_COUNT; count++ ) {
1873 if (isi_card[count].base)
1874 free_irq(isi_card[count].irq, &isi_card[count]);
1875 }
1876}
1877
Adrian Bunk4b849722005-06-25 14:58:52 -07001878static int __devinit isicom_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001879{
1880 int card, channel, base;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001881 struct isi_port *port;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001882 unsigned long page;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001883
1884 if (!tmp_buf) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001885 page = get_zeroed_page(GFP_KERNEL);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001886 if (!page) {
1887#ifdef ISICOM_DEBUG
1888 printk(KERN_DEBUG "ISICOM: Couldn't allocate page for tmp_buf.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001889#else
1890 printk(KERN_ERR "ISICOM: Not enough memory...\n");
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001891#endif
1892 return 0;
1893 }
1894 tmp_buf = (unsigned char *) page;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001895 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001896
1897 if (!register_ioregion())
Linus Torvalds1da177e2005-04-16 15:20:36 -07001898 {
1899 printk(KERN_ERR "ISICOM: All required I/O space found busy.\n");
1900 free_page((unsigned long)tmp_buf);
1901 return 0;
1902 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001903 if (register_drivers())
Linus Torvalds1da177e2005-04-16 15:20:36 -07001904 {
1905 unregister_ioregion();
1906 free_page((unsigned long)tmp_buf);
1907 return 0;
1908 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001909 if (!register_isr())
Linus Torvalds1da177e2005-04-16 15:20:36 -07001910 {
1911 unregister_drivers();
1912 /* ioports already uregistered in register_isr */
1913 free_page((unsigned long)tmp_buf);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001914 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001915 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001916
Linus Torvalds1da177e2005-04-16 15:20:36 -07001917 memset(isi_ports, 0, sizeof(isi_ports));
1918 for (card = 0; card < BOARD_COUNT; card++) {
1919 port = &isi_ports[card * 16];
1920 isi_card[card].ports = port;
1921 spin_lock_init(&isi_card[card].card_lock);
1922 base = isi_card[card].base;
1923 for (channel = 0; channel < 16; channel++, port++) {
1924 port->magic = ISICOM_MAGIC;
1925 port->card = &isi_card[card];
1926 port->channel = channel;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001927 port->close_delay = 50 * HZ/100;
1928 port->closing_wait = 3000 * HZ/100;
1929 INIT_WORK(&port->hangup_tq, do_isicom_hangup, port);
1930 INIT_WORK(&port->bh_tqueue, isicom_bottomhalf, port);
1931 port->status = 0;
1932 init_waitqueue_head(&port->open_wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001933 init_waitqueue_head(&port->close_wait);
1934 /* . . . */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001935 }
1936 }
1937
1938 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001939}
1940
1941/*
1942 * Insmod can set static symbols so keep these static
1943 */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001944
Linus Torvalds1da177e2005-04-16 15:20:36 -07001945static int io[4];
1946static int irq[4];
1947
1948MODULE_AUTHOR("MultiTech");
1949MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech");
1950MODULE_LICENSE("GPL");
1951module_param_array(io, int, NULL, 0);
1952MODULE_PARM_DESC(io, "I/O ports for the cards");
1953module_param_array(irq, int, NULL, 0);
1954MODULE_PARM_DESC(irq, "Interrupts for the cards");
1955
1956static int __devinit isicom_setup(void)
1957{
1958 struct pci_dev *dev = NULL;
1959 int retval, card, idx, count;
1960 unsigned char pciirq;
1961 unsigned int ioaddr;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001962
Linus Torvalds1da177e2005-04-16 15:20:36 -07001963 card = 0;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001964 for (idx=0; idx < BOARD_COUNT; idx++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001965 if (io[idx]) {
1966 isi_card[idx].base=io[idx];
1967 isi_card[idx].irq=irq[idx];
1968 isi_card[idx].isa=YES;
1969 card++;
1970 }
1971 else {
1972 isi_card[idx].base = 0;
1973 isi_card[idx].irq = 0;
1974 }
1975 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001976
Linus Torvalds1da177e2005-04-16 15:20:36 -07001977 for (idx=0 ;idx < card; idx++) {
1978 if (!((isi_card[idx].irq==2)||(isi_card[idx].irq==3)||
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001979 (isi_card[idx].irq==4)||(isi_card[idx].irq==5)||
1980 (isi_card[idx].irq==7)||(isi_card[idx].irq==10)||
1981 (isi_card[idx].irq==11)||(isi_card[idx].irq==12)||
1982 (isi_card[idx].irq==15))) {
1983
Linus Torvalds1da177e2005-04-16 15:20:36 -07001984 if (isi_card[idx].base) {
1985 printk(KERN_ERR "ISICOM: Irq %d unsupported. Disabling Card%d...\n",
1986 isi_card[idx].irq, idx+1);
1987 isi_card[idx].base=0;
1988 card--;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001989 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001990 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001991 }
1992
Linus Torvalds1da177e2005-04-16 15:20:36 -07001993 if (card < BOARD_COUNT) {
1994 for (idx=0; idx < DEVID_COUNT; idx++) {
1995 dev = NULL;
1996 for (;;){
1997 if (!(dev = pci_find_device(VENDOR_ID, isicom_pci_tbl[idx].device, dev)))
1998 break;
1999 if (card >= BOARD_COUNT)
2000 break;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08002001
Linus Torvalds1da177e2005-04-16 15:20:36 -07002002 if (pci_enable_device(dev))
2003 break;
2004
2005 /* found a PCI ISI card! */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08002006 ioaddr = pci_resource_start (dev, 3);
2007 /* i.e at offset 0x1c in the
2008 * PCI configuration register
2009 * space.
2010 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002011 pciirq = dev->irq;
2012 printk(KERN_INFO "ISI PCI Card(Device ID 0x%x)\n", isicom_pci_tbl[idx].device);
2013 /*
2014 * allot the first empty slot in the array
Jiri Slabyd8d16e42006-01-09 20:54:21 -08002015 */
2016 for (count=0; count < BOARD_COUNT; count++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002017 if (isi_card[count].base == 0) {
2018 isi_card[count].base = ioaddr;
2019 isi_card[count].irq = pciirq;
2020 isi_card[count].isa = NO;
2021 card++;
2022 break;
2023 }
2024 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -08002025 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002026 if (card >= BOARD_COUNT) break;
2027 }
2028 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -08002029
Linus Torvalds1da177e2005-04-16 15:20:36 -07002030 if (!(isi_card[0].base || isi_card[1].base || isi_card[2].base || isi_card[3].base)) {
Jiri Slabyd8d16e42006-01-09 20:54:21 -08002031 printk(KERN_ERR "ISICOM: No valid card configuration. Driver cannot be initialized...\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002032 return -EIO;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08002033 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002034
2035 retval = misc_register(&isiloader_device);
2036 if (retval < 0) {
2037 printk(KERN_ERR "ISICOM: Unable to register firmware loader driver.\n");
2038 return retval;
2039 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -08002040
Linus Torvalds1da177e2005-04-16 15:20:36 -07002041 if (!isicom_init()) {
Jiri Slabyd8d16e42006-01-09 20:54:21 -08002042 if (misc_deregister(&isiloader_device))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002043 printk(KERN_ERR "ISICOM: Unable to unregister Firmware Loader driver\n");
2044 return -EIO;
2045 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -08002046
Linus Torvalds1da177e2005-04-16 15:20:36 -07002047 init_timer(&tx);
2048 tx.expires = jiffies + 1;
2049 tx.data = 0;
2050 tx.function = isicom_tx;
2051 re_schedule = 1;
2052 add_timer(&tx);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08002053
Linus Torvalds1da177e2005-04-16 15:20:36 -07002054 return 0;
2055}
2056
2057static void __exit isicom_exit(void)
2058{
2059 re_schedule = 0;
2060 /* FIXME */
2061 msleep(1000);
2062 unregister_isr();
2063 unregister_drivers();
Jiri Slabyd8d16e42006-01-09 20:54:21 -08002064 unregister_ioregion();
2065 if (tmp_buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002066 free_page((unsigned long)tmp_buf);
2067 if (misc_deregister(&isiloader_device))
2068 printk(KERN_ERR "ISICOM: Unable to unregister Firmware Loader driver\n");
2069}
2070
2071module_init(isicom_setup);
2072module_exit(isicom_exit);