blob: 478bf4d7d0659ac14922eb76adfecfcb448a6cbd [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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110 * Merge testing
111 * 64-bit verification
112 */
113
114#include <linux/module.h>
Jiri Slabye65c1db2006-01-09 20:54:25 -0800115#include <linux/firmware.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116#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>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124#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
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800137#define InterruptTheCard(base) outw(0, (base) + 0xc)
138#define ClearInterrupt(base) inw((base) + 0x0a)
139
140#ifdef DEBUG
141#define pr_dbg(str...) printk(KERN_DEBUG "ISICOM: " str)
142#define isicom_paranoia_check(a, b, c) __isicom_paranoia_check((a), (b), (c))
143#else
144#define pr_dbg(str...) do { } while (0)
145#define isicom_paranoia_check(a, b, c) 0
146#endif
147
Jiri Slaby9ac09482006-01-09 20:54:24 -0800148static int isicom_probe(struct pci_dev *, const struct pci_device_id *);
149static void __devexit isicom_remove(struct pci_dev *);
150
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151static struct pci_device_id isicom_pci_tbl[] = {
Jiri Slaby9ac09482006-01-09 20:54:24 -0800152 { PCI_DEVICE(VENDOR_ID, 0x2028) },
153 { PCI_DEVICE(VENDOR_ID, 0x2051) },
154 { PCI_DEVICE(VENDOR_ID, 0x2052) },
155 { PCI_DEVICE(VENDOR_ID, 0x2053) },
156 { PCI_DEVICE(VENDOR_ID, 0x2054) },
157 { PCI_DEVICE(VENDOR_ID, 0x2055) },
158 { PCI_DEVICE(VENDOR_ID, 0x2056) },
159 { PCI_DEVICE(VENDOR_ID, 0x2057) },
160 { PCI_DEVICE(VENDOR_ID, 0x2058) },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161 { 0 }
162};
163MODULE_DEVICE_TABLE(pci, isicom_pci_tbl);
164
Jiri Slaby9ac09482006-01-09 20:54:24 -0800165static struct pci_driver isicom_driver = {
166 .name = "isicom",
167 .id_table = isicom_pci_tbl,
168 .probe = isicom_probe,
169 .remove = __devexit_p(isicom_remove)
170};
171
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172static int prev_card = 3; /* start servicing isi_card[0] */
173static struct tty_driver *isicom_normal;
174
175static struct timer_list tx;
176static char re_schedule = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178static void isicom_tx(unsigned long _data);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800179static void isicom_start(struct tty_struct *tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181/* baud index mappings from linux defns to isi */
182
183static signed char linuxb_to_isib[] = {
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800184 -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 -0700185};
186
187struct isi_board {
Jiri Slaby8070e352006-01-09 20:54:22 -0800188 unsigned long base;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189 unsigned char irq;
190 unsigned char port_count;
191 unsigned short status;
Jiri Slabya547dfe2006-01-09 20:54:26 -0800192 unsigned short port_status; /* each bit for each port */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193 unsigned short shift_count;
194 struct isi_port * ports;
195 signed char count;
196 unsigned char isa;
197 spinlock_t card_lock; /* Card wide lock 11/5/00 -sameer */
198 unsigned long flags;
199};
200
201struct isi_port {
202 unsigned short magic;
203 unsigned int flags;
204 int count;
205 int blocked_open;
206 int close_delay;
Jiri Slaby8070e352006-01-09 20:54:22 -0800207 u16 channel;
208 u16 status;
209 u16 closing_wait;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 struct isi_board * card;
211 struct tty_struct * tty;
212 wait_queue_head_t close_wait;
213 wait_queue_head_t open_wait;
214 struct work_struct hangup_tq;
215 struct work_struct bh_tqueue;
216 unsigned char * xmit_buf;
217 int xmit_head;
218 int xmit_tail;
219 int xmit_cnt;
220};
221
222static struct isi_board isi_card[BOARD_COUNT];
223static struct isi_port isi_ports[PORT_COUNT];
224
225/*
226 * Locking functions for card level locking. We need to own both
227 * the kernel lock for the card and have the card in a position that
228 * it wants to talk.
229 */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800230
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231static int lock_card(struct isi_board *card)
232{
233 char retries;
Jiri Slaby8070e352006-01-09 20:54:22 -0800234 unsigned long base = card->base;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235
236 for (retries = 0; retries < 100; retries++) {
237 spin_lock_irqsave(&card->card_lock, card->flags);
238 if (inw(base + 0xe) & 0x1) {
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800239 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 } else {
241 spin_unlock_irqrestore(&card->card_lock, card->flags);
242 udelay(1000); /* 1ms */
243 }
244 }
Jiri Slabya547dfe2006-01-09 20:54:26 -0800245 printk(KERN_WARNING "ISICOM: Failed to lock Card (0x%lx)\n",
246 card->base);
247
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 return 0; /* Failed to aquire the card! */
249}
250
251static int lock_card_at_interrupt(struct isi_board *card)
252{
253 unsigned char retries;
Jiri Slaby8070e352006-01-09 20:54:22 -0800254 unsigned long base = card->base;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255
256 for (retries = 0; retries < 200; retries++) {
257 spin_lock_irqsave(&card->card_lock, card->flags);
258
259 if (inw(base + 0xe) & 0x1)
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800260 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261 else
262 spin_unlock_irqrestore(&card->card_lock, card->flags);
263 }
264 /* Failing in interrupt is an acceptable event */
265 return 0; /* Failed to aquire the card! */
266}
267
268static void unlock_card(struct isi_board *card)
269{
270 spin_unlock_irqrestore(&card->card_lock, card->flags);
271}
272
273/*
274 * ISI Card specific ops ...
275 */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800276
277static void raise_dtr(struct isi_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278{
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800279 struct isi_board *card = port->card;
Jiri Slaby8070e352006-01-09 20:54:22 -0800280 unsigned long base = card->base;
281 u16 channel = port->channel;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282
283 if (!lock_card(card))
284 return;
285
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800286 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287 outw(0x0504, base);
288 InterruptTheCard(base);
289 port->status |= ISI_DTR;
290 unlock_card(card);
291}
292
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800293static inline void drop_dtr(struct isi_port *port)
294{
295 struct isi_board *card = port->card;
Jiri Slaby8070e352006-01-09 20:54:22 -0800296 unsigned long base = card->base;
297 u16 channel = port->channel;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298
299 if (!lock_card(card))
300 return;
301
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800302 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303 outw(0x0404, base);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800304 InterruptTheCard(base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305 port->status &= ~ISI_DTR;
306 unlock_card(card);
307}
308
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800309static inline void raise_rts(struct isi_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310{
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800311 struct isi_board *card = port->card;
Jiri Slaby8070e352006-01-09 20:54:22 -0800312 unsigned long base = card->base;
313 u16 channel = port->channel;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314
315 if (!lock_card(card))
316 return;
317
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800318 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319 outw(0x0a04, base);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800320 InterruptTheCard(base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321 port->status |= ISI_RTS;
322 unlock_card(card);
323}
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800324static inline void drop_rts(struct isi_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325{
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800326 struct isi_board *card = port->card;
Jiri Slaby8070e352006-01-09 20:54:22 -0800327 unsigned long base = card->base;
328 u16 channel = port->channel;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329
330 if (!lock_card(card))
331 return;
332
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800333 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334 outw(0x0804, base);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800335 InterruptTheCard(base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336 port->status &= ~ISI_RTS;
337 unlock_card(card);
338}
339
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800340static inline void raise_dtr_rts(struct isi_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341{
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800342 struct isi_board *card = port->card;
Jiri Slaby8070e352006-01-09 20:54:22 -0800343 unsigned long base = card->base;
344 u16 channel = port->channel;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345
346 if (!lock_card(card))
347 return;
348
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800349 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350 outw(0x0f04, base);
351 InterruptTheCard(base);
352 port->status |= (ISI_DTR | ISI_RTS);
353 unlock_card(card);
354}
355
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800356static void drop_dtr_rts(struct isi_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357{
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800358 struct isi_board *card = port->card;
Jiri Slaby8070e352006-01-09 20:54:22 -0800359 unsigned long base = card->base;
360 u16 channel = port->channel;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361
362 if (!lock_card(card))
363 return;
364
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800365 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366 outw(0x0c04, base);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800367 InterruptTheCard(base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368 port->status &= ~(ISI_RTS | ISI_DTR);
369 unlock_card(card);
370}
371
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800372static inline void kill_queue(struct isi_port *port, short queue)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373{
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800374 struct isi_board *card = port->card;
Jiri Slaby8070e352006-01-09 20:54:22 -0800375 unsigned long base = card->base;
376 u16 channel = port->channel;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377
378 if (!lock_card(card))
379 return;
380
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800381 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 outw((queue << 8) | 0x06, base);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800383 InterruptTheCard(base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384 unlock_card(card);
385}
386
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387/*
388 * ISICOM Driver specific routines ...
389 *
390 */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800391
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800392static inline int __isicom_paranoia_check(struct isi_port const *port,
393 char *name, const char *routine)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395 if (!port) {
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800396 printk(KERN_WARNING "ISICOM: Warning: bad isicom magic for "
397 "dev %s in %s.\n", name, routine);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398 return 1;
399 }
400 if (port->magic != ISICOM_MAGIC) {
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800401 printk(KERN_WARNING "ISICOM: Warning: NULL isicom port for "
402 "dev %s in %s.\n", name, routine);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403 return 1;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800404 }
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800405
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406 return 0;
407}
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800408
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409/*
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800410 * Transmitter.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411 *
412 * We shovel data into the card buffers on a regular basis. The card
413 * will do the rest of the work for us.
414 */
415
416static void isicom_tx(unsigned long _data)
417{
418 short count = (BOARD_COUNT-1), card, base;
419 short txcount, wrd, residue, word_count, cnt;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800420 struct isi_port *port;
421 struct tty_struct *tty;
422
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423 /* find next active board */
424 card = (prev_card + 1) & 0x0003;
425 while(count-- > 0) {
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800426 if (isi_card[card].status & BOARD_ACTIVE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427 break;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800428 card = (card + 1) & 0x0003;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429 }
430 if (!(isi_card[card].status & BOARD_ACTIVE))
431 goto sched_again;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800432
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433 prev_card = card;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800434
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 count = isi_card[card].port_count;
436 port = isi_card[card].ports;
437 base = isi_card[card].base;
438 for (;count > 0;count--, port++) {
439 if (!lock_card_at_interrupt(&isi_card[card]))
440 continue;
441 /* port not active or tx disabled to force flow control */
442 if (!(port->flags & ASYNC_INITIALIZED) ||
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800443 !(port->status & ISI_TXOK))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 unlock_card(&isi_card[card]);
445 continue;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800446
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447 tty = port->tty;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800448
449
450 if (tty == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451 unlock_card(&isi_card[card]);
452 continue;
453 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800454
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455 txcount = min_t(short, TX_SIZE, port->xmit_cnt);
456 if (txcount <= 0 || tty->stopped || tty->hw_stopped) {
457 unlock_card(&isi_card[card]);
458 continue;
459 }
460 if (!(inw(base + 0x02) & (1 << port->channel))) {
461 unlock_card(&isi_card[card]);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800462 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463 }
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800464 pr_dbg("txing %d bytes, port%d.\n", txcount,
465 port->channel + 1);
466 outw((port->channel << isi_card[card].shift_count) | txcount,
467 base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468 residue = NO;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800469 wrd = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470 while (1) {
Jiri Slabya547dfe2006-01-09 20:54:26 -0800471 cnt = min_t(int, txcount, (SERIAL_XMIT_SIZE
472 - port->xmit_tail));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473 if (residue == YES) {
474 residue = NO;
475 if (cnt > 0) {
Jiri Slabya547dfe2006-01-09 20:54:26 -0800476 wrd |= (port->xmit_buf[port->xmit_tail]
477 << 8);
478 port->xmit_tail = (port->xmit_tail + 1)
479 & (SERIAL_XMIT_SIZE - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480 port->xmit_cnt--;
481 txcount--;
482 cnt--;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800483 outw(wrd, base);
Jiri Slabya547dfe2006-01-09 20:54:26 -0800484 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485 outw(wrd, base);
486 break;
487 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800488 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489 if (cnt <= 0) break;
490 word_count = cnt >> 1;
Jiri Slabya547dfe2006-01-09 20:54:26 -0800491 outsw(base, port->xmit_buf+port->xmit_tail,word_count);
492 port->xmit_tail = (port->xmit_tail
493 + (word_count << 1)) & (SERIAL_XMIT_SIZE - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494 txcount -= (word_count << 1);
495 port->xmit_cnt -= (word_count << 1);
496 if (cnt & 0x0001) {
497 residue = YES;
498 wrd = port->xmit_buf[port->xmit_tail];
Jiri Slabya547dfe2006-01-09 20:54:26 -0800499 port->xmit_tail = (port->xmit_tail + 1)
500 & (SERIAL_XMIT_SIZE - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501 port->xmit_cnt--;
502 txcount--;
503 }
504 }
505
506 InterruptTheCard(base);
507 if (port->xmit_cnt <= 0)
508 port->status &= ~ISI_TXOK;
509 if (port->xmit_cnt <= WAKEUP_CHARS)
510 schedule_work(&port->bh_tqueue);
511 unlock_card(&isi_card[card]);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800512 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800514 /* schedule another tx for hopefully in about 10ms */
515sched_again:
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800516 if (!re_schedule) {
517 re_schedule = 2;
518 return;
519 }
520
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521 init_timer(&tx);
522 tx.expires = jiffies + HZ/100;
523 tx.data = 0;
524 tx.function = isicom_tx;
525 add_timer(&tx);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800526
527 return;
528}
529
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530/* Interrupt handlers */
531
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800532
533static void isicom_bottomhalf(void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534{
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800535 struct isi_port *port = (struct isi_port *) data;
536 struct tty_struct *tty = port->tty;
537
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538 if (!tty)
539 return;
540
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800541 tty_wakeup(tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542 wake_up_interruptible(&tty->write_wait);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800543}
544
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545/*
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800546 * Main interrupt handler routine
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547 */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800548
Jiri Slaby8070e352006-01-09 20:54:22 -0800549static irqreturn_t isicom_interrupt(int irq, void *dev_id, struct pt_regs *regs)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550{
Jiri Slaby8070e352006-01-09 20:54:22 -0800551 struct isi_board *card = dev_id;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800552 struct isi_port *port;
553 struct tty_struct *tty;
Jiri Slaby8070e352006-01-09 20:54:22 -0800554 unsigned long base;
555 u16 header, word_count, count, channel;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556 short byte_count;
Alan Cox33f0f882006-01-09 20:54:13 -0800557 unsigned char *rp;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800558
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559 if (!card || !(card->status & FIRMWARE_LOADED))
560 return IRQ_NONE;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800561
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562 base = card->base;
563 spin_lock(&card->card_lock);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800564
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565 if (card->isa == NO) {
566 /*
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800567 * disable any interrupts from the PCI card and lower the
568 * interrupt line
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569 */
570 outw(0x8000, base+0x04);
571 ClearInterrupt(base);
572 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800573
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574 inw(base); /* get the dummy word out */
575 header = inw(base);
576 channel = (header & 0x7800) >> card->shift_count;
577 byte_count = header & 0xff;
578
579 if (channel + 1 > card->port_count) {
Jiri Slabya547dfe2006-01-09 20:54:26 -0800580 printk(KERN_WARNING "ISICOM: isicom_interrupt(0x%lx): "
581 "%d(channel) > port_count.\n", base, channel+1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582 if (card->isa)
583 ClearInterrupt(base);
584 else
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800585 outw(0x0000, base+0x04); /* enable interrupts */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586 spin_unlock(&card->card_lock);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800587 return IRQ_HANDLED;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588 }
589 port = card->ports + channel;
590 if (!(port->flags & ASYNC_INITIALIZED)) {
591 if (card->isa)
592 ClearInterrupt(base);
593 else
594 outw(0x0000, base+0x04); /* enable interrupts */
595 return IRQ_HANDLED;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800596 }
597
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598 tty = port->tty;
599 if (tty == NULL) {
600 word_count = byte_count >> 1;
601 while(byte_count > 1) {
602 inw(base);
603 byte_count -= 2;
604 }
605 if (byte_count & 0x01)
606 inw(base);
607 if (card->isa == YES)
608 ClearInterrupt(base);
609 else
610 outw(0x0000, base+0x04); /* enable interrupts */
611 spin_unlock(&card->card_lock);
612 return IRQ_HANDLED;
613 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800614
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615 if (header & 0x8000) { /* Status Packet */
616 header = inw(base);
617 switch(header & 0xff) {
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800618 case 0: /* Change in EIA signals */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800619 if (port->flags & ASYNC_CHECK_CD) {
620 if (port->status & ISI_DCD) {
621 if (!(header & ISI_DCD)) {
622 /* Carrier has been lost */
Jiri Slabya547dfe2006-01-09 20:54:26 -0800623 pr_dbg("interrupt: DCD->low.\n"
624 );
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625 port->status &= ~ISI_DCD;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800626 schedule_work(&port->hangup_tq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627 }
Jiri Slabya547dfe2006-01-09 20:54:26 -0800628 } else if (header & ISI_DCD) {
629 /* Carrier has been detected */
630 pr_dbg("interrupt: DCD->high.\n");
631 port->status |= ISI_DCD;
632 wake_up_interruptible(&port->open_wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633 }
Jiri Slabya547dfe2006-01-09 20:54:26 -0800634 } else {
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800635 if (header & ISI_DCD)
636 port->status |= ISI_DCD;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637 else
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800638 port->status &= ~ISI_DCD;
639 }
640
641 if (port->flags & ASYNC_CTS_FLOW) {
642 if (port->tty->hw_stopped) {
643 if (header & ISI_CTS) {
644 port->tty->hw_stopped = 0;
645 /* start tx ing */
Jiri Slabya547dfe2006-01-09 20:54:26 -0800646 port->status |= (ISI_TXOK
647 | ISI_CTS);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800648 schedule_work(&port->bh_tqueue);
649 }
Jiri Slabya547dfe2006-01-09 20:54:26 -0800650 } else if (!(header & ISI_CTS)) {
651 port->tty->hw_stopped = 1;
652 /* stop tx ing */
653 port->status &= ~(ISI_TXOK | ISI_CTS);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800654 }
Jiri Slabya547dfe2006-01-09 20:54:26 -0800655 } else {
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800656 if (header & ISI_CTS)
657 port->status |= ISI_CTS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658 else
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800659 port->status &= ~ISI_CTS;
660 }
661
662 if (header & ISI_DSR)
663 port->status |= ISI_DSR;
664 else
665 port->status &= ~ISI_DSR;
666
667 if (header & ISI_RI)
668 port->status |= ISI_RI;
669 else
670 port->status &= ~ISI_RI;
671
672 break;
673
Jiri Slabya547dfe2006-01-09 20:54:26 -0800674 case 1: /* Received Break !!! */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800675 tty_insert_flip_char(tty, 0, TTY_BREAK);
676 if (port->flags & ASYNC_SAK)
677 do_SAK(tty);
678 tty_flip_buffer_push(tty);
679 break;
680
681 case 2: /* Statistics */
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800682 pr_dbg("isicom_interrupt: stats!!!.\n");
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800683 break;
684
685 default:
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800686 pr_dbg("Intr: Unknown code in status packet.\n");
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800687 break;
688 }
Jiri Slabya547dfe2006-01-09 20:54:26 -0800689 } else { /* Data Packet */
Alan Cox33f0f882006-01-09 20:54:13 -0800690
691 count = tty_prepare_flip_string(tty, &rp, byte_count & ~1);
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800692 pr_dbg("Intr: Can rx %d of %d bytes.\n", count, byte_count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700693 word_count = count >> 1;
Alan Cox33f0f882006-01-09 20:54:13 -0800694 insw(base, rp, word_count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700695 byte_count -= (word_count << 1);
696 if (count & 0x0001) {
Jiri Slabya547dfe2006-01-09 20:54:26 -0800697 tty_insert_flip_char(tty, inw(base) & 0xff,
698 TTY_NORMAL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700699 byte_count -= 2;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800700 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701 if (byte_count > 0) {
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800702 pr_dbg("Intr(0x%lx:%d): Flip buffer overflow! dropping "
703 "bytes...\n", base, channel + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700704 while(byte_count > 0) { /* drain out unread xtra data */
705 inw(base);
706 byte_count -= 2;
707 }
708 }
Alan Cox33f0f882006-01-09 20:54:13 -0800709 tty_flip_buffer_push(tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710 }
711 if (card->isa == YES)
712 ClearInterrupt(base);
713 else
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800714 outw(0x0000, base+0x04); /* enable interrupts */
Jiri Slabya547dfe2006-01-09 20:54:26 -0800715
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716 return IRQ_HANDLED;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800717}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700718
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800719static void isicom_config_port(struct isi_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720{
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800721 struct isi_board *card = port->card;
722 struct tty_struct *tty;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723 unsigned long baud;
Jiri Slaby8070e352006-01-09 20:54:22 -0800724 unsigned long base = card->base;
725 u16 channel_setup, channel = port->channel,
726 shift_count = card->shift_count;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727 unsigned char flow_ctrl;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800728
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729 if (!(tty = port->tty) || !tty->termios)
730 return;
731 baud = C_BAUD(tty);
732 if (baud & CBAUDEX) {
733 baud &= ~CBAUDEX;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800734
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735 /* if CBAUDEX bit is on and the baud is set to either 50 or 75
736 * then the card is programmed for 57.6Kbps or 115Kbps
737 * respectively.
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800738 */
739
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740 if (baud < 1 || baud > 2)
741 port->tty->termios->c_cflag &= ~CBAUDEX;
742 else
743 baud += 15;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800744 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745 if (baud == 15) {
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800746
747 /* the ASYNC_SPD_HI and ASYNC_SPD_VHI options are set
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748 * by the set_serial_info ioctl ... this is done by
749 * the 'setserial' utility.
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800750 */
751
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752 if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800753 baud++; /* 57.6 Kbps */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754 if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800755 baud +=2; /* 115 Kbps */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756 }
757 if (linuxb_to_isib[baud] == -1) {
758 /* hang up */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800759 drop_dtr(port);
760 return;
761 }
762 else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763 raise_dtr(port);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800764
Linus Torvalds1da177e2005-04-16 15:20:36 -0700765 if (lock_card(card)) {
766 outw(0x8000 | (channel << shift_count) |0x03, base);
767 outw(linuxb_to_isib[baud] << 8 | 0x03, base);
768 channel_setup = 0;
769 switch(C_CSIZE(tty)) {
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800770 case CS5:
771 channel_setup |= ISICOM_CS5;
772 break;
773 case CS6:
774 channel_setup |= ISICOM_CS6;
775 break;
776 case CS7:
777 channel_setup |= ISICOM_CS7;
778 break;
779 case CS8:
780 channel_setup |= ISICOM_CS8;
781 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800783
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784 if (C_CSTOPB(tty))
785 channel_setup |= ISICOM_2SB;
786 if (C_PARENB(tty)) {
787 channel_setup |= ISICOM_EVPAR;
788 if (C_PARODD(tty))
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800789 channel_setup |= ISICOM_ODPAR;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700790 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800791 outw(channel_setup, base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700792 InterruptTheCard(base);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800793 unlock_card(card);
794 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700795 if (C_CLOCAL(tty))
796 port->flags &= ~ASYNC_CHECK_CD;
797 else
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800798 port->flags |= ASYNC_CHECK_CD;
799
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800 /* flow control settings ...*/
801 flow_ctrl = 0;
802 port->flags &= ~ASYNC_CTS_FLOW;
803 if (C_CRTSCTS(tty)) {
804 port->flags |= ASYNC_CTS_FLOW;
805 flow_ctrl |= ISICOM_CTSRTS;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800806 }
807 if (I_IXON(tty))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808 flow_ctrl |= ISICOM_RESPOND_XONXOFF;
809 if (I_IXOFF(tty))
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800810 flow_ctrl |= ISICOM_INITIATE_XONXOFF;
811
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812 if (lock_card(card)) {
813 outw(0x8000 | (channel << shift_count) |0x04, base);
814 outw(flow_ctrl << 8 | 0x05, base);
815 outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base);
816 InterruptTheCard(base);
817 unlock_card(card);
818 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800819
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820 /* rx enabled -> enable port for rx on the card */
821 if (C_CREAD(tty)) {
822 card->port_status |= (1 << channel);
823 outw(card->port_status, base + 0x02);
824 }
825}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800827/* open et all */
828
829static inline void isicom_setup_board(struct isi_board *bp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700830{
831 int channel;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800832 struct isi_port *port;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700833 unsigned long flags;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800834
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835 spin_lock_irqsave(&bp->card_lock, flags);
836 if (bp->status & BOARD_ACTIVE) {
837 spin_unlock_irqrestore(&bp->card_lock, flags);
838 return;
839 }
840 port = bp->ports;
841 bp->status |= BOARD_ACTIVE;
842 spin_unlock_irqrestore(&bp->card_lock, flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800843 for (channel = 0; channel < bp->port_count; channel++, port++)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844 drop_dtr_rts(port);
845 return;
846}
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800847
848static int isicom_setup_port(struct isi_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849{
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800850 struct isi_board *card = port->card;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700851 unsigned long flags;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800852
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853 if (port->flags & ASYNC_INITIALIZED) {
854 return 0;
855 }
856 if (!port->xmit_buf) {
857 unsigned long page;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800858
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859 if (!(page = get_zeroed_page(GFP_KERNEL)))
860 return -ENOMEM;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800861
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862 if (port->xmit_buf) {
863 free_page(page);
864 return -ERESTARTSYS;
865 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800866 port->xmit_buf = (unsigned char *) page;
867 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700868
869 spin_lock_irqsave(&card->card_lock, flags);
870 if (port->tty)
871 clear_bit(TTY_IO_ERROR, &port->tty->flags);
872 if (port->count == 1)
873 card->count++;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800874
Linus Torvalds1da177e2005-04-16 15:20:36 -0700875 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800876
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877 /* discard any residual data */
878 kill_queue(port, ISICOM_KILLTX | ISICOM_KILLRX);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800879
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880 isicom_config_port(port);
881 port->flags |= ASYNC_INITIALIZED;
882 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800883
884 return 0;
885}
886
Jiri Slabya547dfe2006-01-09 20:54:26 -0800887static int block_til_ready(struct tty_struct *tty, struct file *filp,
888 struct isi_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700889{
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800890 struct isi_board *card = port->card;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700891 int do_clocal = 0, retval;
892 unsigned long flags;
893 DECLARE_WAITQUEUE(wait, current);
894
895 /* block if port is in the process of being closed */
896
897 if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) {
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800898 pr_dbg("block_til_ready: close in progress.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700899 interruptible_sleep_on(&port->close_wait);
900 if (port->flags & ASYNC_HUP_NOTIFY)
901 return -EAGAIN;
902 else
903 return -ERESTARTSYS;
904 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800905
Linus Torvalds1da177e2005-04-16 15:20:36 -0700906 /* if non-blocking mode is set ... */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800907
Jiri Slabya547dfe2006-01-09 20:54:26 -0800908 if ((filp->f_flags & O_NONBLOCK) ||
909 (tty->flags & (1 << TTY_IO_ERROR))) {
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800910 pr_dbg("block_til_ready: non-block mode.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911 port->flags |= ASYNC_NORMAL_ACTIVE;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800912 return 0;
913 }
914
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915 if (C_CLOCAL(tty))
916 do_clocal = 1;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800917
918 /* block waiting for DCD to be asserted, and while
Linus Torvalds1da177e2005-04-16 15:20:36 -0700919 callout dev is busy */
920 retval = 0;
921 add_wait_queue(&port->open_wait, &wait);
922
923 spin_lock_irqsave(&card->card_lock, flags);
924 if (!tty_hung_up_p(filp))
925 port->count--;
926 port->blocked_open++;
927 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800928
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929 while (1) {
930 raise_dtr_rts(port);
931
932 set_current_state(TASK_INTERRUPTIBLE);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800933 if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700934 if (port->flags & ASYNC_HUP_NOTIFY)
935 retval = -EAGAIN;
936 else
937 retval = -ERESTARTSYS;
938 break;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800939 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940 if (!(port->flags & ASYNC_CLOSING) &&
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800941 (do_clocal || (port->status & ISI_DCD))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942 break;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800943 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944 if (signal_pending(current)) {
945 retval = -ERESTARTSYS;
946 break;
947 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800948 schedule();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700949 }
950 set_current_state(TASK_RUNNING);
951 remove_wait_queue(&port->open_wait, &wait);
952 spin_lock_irqsave(&card->card_lock, flags);
953 if (!tty_hung_up_p(filp))
954 port->count++;
955 port->blocked_open--;
956 spin_unlock_irqrestore(&card->card_lock, flags);
957 if (retval)
958 return retval;
959 port->flags |= ASYNC_NORMAL_ACTIVE;
960 return 0;
961}
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800962
963static int isicom_open(struct tty_struct *tty, struct file *filp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700964{
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800965 struct isi_port *port;
966 struct isi_board *card;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700967 unsigned int line, board;
968 int error;
969
970 line = tty->index;
971 if (line < 0 || line > PORT_COUNT-1)
972 return -ENODEV;
973 board = BOARD(line);
974 card = &isi_card[board];
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800975
Linus Torvalds1da177e2005-04-16 15:20:36 -0700976 if (!(card->status & FIRMWARE_LOADED))
977 return -ENODEV;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800978
Linus Torvalds1da177e2005-04-16 15:20:36 -0700979 /* open on a port greater than the port count for the card !!! */
980 if (line > ((board * 16) + card->port_count - 1))
981 return -ENODEV;
982
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800983 port = &isi_ports[line];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984 if (isicom_paranoia_check(port, tty->name, "isicom_open"))
985 return -ENODEV;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800986
987 isicom_setup_board(card);
988
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989 port->count++;
990 tty->driver_data = port;
991 port->tty = tty;
992 if ((error = isicom_setup_port(port))!=0)
993 return error;
994 if ((error = block_til_ready(tty, filp, port))!=0)
995 return error;
996
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800997 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700998}
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800999
Linus Torvalds1da177e2005-04-16 15:20:36 -07001000/* close et all */
1001
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001002static inline void isicom_shutdown_board(struct isi_board *bp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001003{
1004 unsigned long flags;
1005
1006 spin_lock_irqsave(&bp->card_lock, flags);
1007 if (bp->status & BOARD_ACTIVE) {
1008 bp->status &= ~BOARD_ACTIVE;
1009 }
1010 spin_unlock_irqrestore(&bp->card_lock, flags);
1011}
1012
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001013static void isicom_shutdown_port(struct isi_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001014{
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001015 struct isi_board *card = port->card;
1016 struct tty_struct *tty;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001017 unsigned long flags;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001018
Linus Torvalds1da177e2005-04-16 15:20:36 -07001019 tty = port->tty;
1020
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001021 spin_lock_irqsave(&card->card_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001022 if (!(port->flags & ASYNC_INITIALIZED)) {
1023 spin_unlock_irqrestore(&card->card_lock, flags);
1024 return;
1025 }
1026 if (port->xmit_buf) {
1027 free_page((unsigned long) port->xmit_buf);
1028 port->xmit_buf = NULL;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001029 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001030 port->flags &= ~ASYNC_INITIALIZED;
1031 /* 3rd October 2000 : Vinayak P Risbud */
1032 port->tty = NULL;
1033 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001034
Linus Torvalds1da177e2005-04-16 15:20:36 -07001035 /*Fix done by Anil .S on 30-04-2001
1036 remote login through isi port has dtr toggle problem
1037 due to which the carrier drops before the password prompt
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001038 appears on the remote end. Now we drop the dtr only if the
Linus Torvalds1da177e2005-04-16 15:20:36 -07001039 HUPCL(Hangup on close) flag is set for the tty*/
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001040
1041 if (C_HUPCL(tty))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001042 /* drop dtr on this port */
1043 drop_dtr(port);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001044
1045 /* any other port uninits */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001046 if (tty)
1047 set_bit(TTY_IO_ERROR, &tty->flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001048
Linus Torvalds1da177e2005-04-16 15:20:36 -07001049 if (--card->count < 0) {
Jiri Slabyaaa246e2006-01-09 20:54:23 -08001050 pr_dbg("isicom_shutdown_port: bad board(0x%lx) count %d.\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001051 card->base, card->count);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001052 card->count = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001053 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001054
Jiri Slabya547dfe2006-01-09 20:54:26 -08001055 /* last port was closed, shutdown that boad too */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001056 if (C_HUPCL(tty)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001057 if (!card->count)
1058 isicom_shutdown_board(card);
1059 }
1060}
1061
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001062static void isicom_close(struct tty_struct *tty, struct file *filp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001063{
Jiri Slaby8070e352006-01-09 20:54:22 -08001064 struct isi_port *port = tty->driver_data;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001065 struct isi_board *card = port->card;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001066 unsigned long flags;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001067
Linus Torvalds1da177e2005-04-16 15:20:36 -07001068 if (!port)
1069 return;
1070 if (isicom_paranoia_check(port, tty->name, "isicom_close"))
1071 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001072
Jiri Slabyaaa246e2006-01-09 20:54:23 -08001073 pr_dbg("Close start!!!.\n");
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001074
Linus Torvalds1da177e2005-04-16 15:20:36 -07001075 spin_lock_irqsave(&card->card_lock, flags);
1076 if (tty_hung_up_p(filp)) {
1077 spin_unlock_irqrestore(&card->card_lock, flags);
1078 return;
1079 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001080
Linus Torvalds1da177e2005-04-16 15:20:36 -07001081 if (tty->count == 1 && port->count != 1) {
Jiri Slabya547dfe2006-01-09 20:54:26 -08001082 printk(KERN_WARNING "ISICOM:(0x%lx) isicom_close: bad port "
1083 "count tty->count = 1 port count = %d.\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001084 card->base, port->count);
1085 port->count = 1;
1086 }
1087 if (--port->count < 0) {
Jiri Slabya547dfe2006-01-09 20:54:26 -08001088 printk(KERN_WARNING "ISICOM:(0x%lx) isicom_close: bad port "
1089 "count for channel%d = %d", card->base, port->channel,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001090 port->count);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001091 port->count = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001092 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001093
Linus Torvalds1da177e2005-04-16 15:20:36 -07001094 if (port->count) {
1095 spin_unlock_irqrestore(&card->card_lock, flags);
1096 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001097 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001098 port->flags |= ASYNC_CLOSING;
1099 tty->closing = 1;
1100 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001101
Linus Torvalds1da177e2005-04-16 15:20:36 -07001102 if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1103 tty_wait_until_sent(tty, port->closing_wait);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001104 /* indicate to the card that no more data can be received
Linus Torvalds1da177e2005-04-16 15:20:36 -07001105 on this port */
1106 spin_lock_irqsave(&card->card_lock, flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001107 if (port->flags & ASYNC_INITIALIZED) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001108 card->port_status &= ~(1 << port->channel);
1109 outw(card->port_status, card->base + 0x02);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001110 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001111 isicom_shutdown_port(port);
1112 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001113
Linus Torvalds1da177e2005-04-16 15:20:36 -07001114 if (tty->driver->flush_buffer)
1115 tty->driver->flush_buffer(tty);
1116 tty_ldisc_flush(tty);
1117
1118 spin_lock_irqsave(&card->card_lock, flags);
1119 tty->closing = 0;
1120
1121 if (port->blocked_open) {
1122 spin_unlock_irqrestore(&card->card_lock, flags);
1123 if (port->close_delay) {
Jiri Slabyaaa246e2006-01-09 20:54:23 -08001124 pr_dbg("scheduling until time out.\n");
Jiri Slabya547dfe2006-01-09 20:54:26 -08001125 msleep_interruptible(
1126 jiffies_to_msecs(port->close_delay));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001127 }
1128 spin_lock_irqsave(&card->card_lock, flags);
1129 wake_up_interruptible(&port->open_wait);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001130 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001131 port->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1132 wake_up_interruptible(&port->close_wait);
1133 spin_unlock_irqrestore(&card->card_lock, flags);
1134}
1135
1136/* write et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001137static int isicom_write(struct tty_struct *tty, const unsigned char *buf,
1138 int count)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139{
Jiri Slaby8070e352006-01-09 20:54:22 -08001140 struct isi_port *port = tty->driver_data;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001141 struct isi_board *card = port->card;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001142 unsigned long flags;
1143 int cnt, total = 0;
1144
1145 if (isicom_paranoia_check(port, tty->name, "isicom_write"))
1146 return 0;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001147
Eric Sesterhenn326f28e92006-06-25 05:48:48 -07001148 if (!port->xmit_buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001149 return 0;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001150
Linus Torvalds1da177e2005-04-16 15:20:36 -07001151 spin_lock_irqsave(&card->card_lock, flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001152
1153 while(1) {
Jiri Slabya547dfe2006-01-09 20:54:26 -08001154 cnt = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt
1155 - 1, SERIAL_XMIT_SIZE - port->xmit_head));
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001156 if (cnt <= 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001157 break;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001158
Linus Torvalds1da177e2005-04-16 15:20:36 -07001159 memcpy(port->xmit_buf + port->xmit_head, buf, cnt);
Jiri Slabya547dfe2006-01-09 20:54:26 -08001160 port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE
1161 - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001162 port->xmit_cnt += cnt;
1163 buf += cnt;
1164 count -= cnt;
1165 total += cnt;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001166 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001167 if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped)
1168 port->status |= ISI_TXOK;
1169 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001170 return total;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001171}
1172
1173/* put_char et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001174static void isicom_put_char(struct tty_struct *tty, unsigned char ch)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001175{
Jiri Slaby8070e352006-01-09 20:54:22 -08001176 struct isi_port *port = tty->driver_data;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001177 struct isi_board *card = port->card;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001178 unsigned long flags;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001179
Linus Torvalds1da177e2005-04-16 15:20:36 -07001180 if (isicom_paranoia_check(port, tty->name, "isicom_put_char"))
1181 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001182
Eric Sesterhenn326f28e92006-06-25 05:48:48 -07001183 if (!port->xmit_buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001184 return;
1185
1186 spin_lock_irqsave(&card->card_lock, flags);
1187 if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
1188 spin_unlock_irqrestore(&card->card_lock, flags);
1189 return;
1190 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001191
Linus Torvalds1da177e2005-04-16 15:20:36 -07001192 port->xmit_buf[port->xmit_head++] = ch;
1193 port->xmit_head &= (SERIAL_XMIT_SIZE - 1);
1194 port->xmit_cnt++;
1195 spin_unlock_irqrestore(&card->card_lock, flags);
1196}
1197
1198/* flush_chars et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001199static void isicom_flush_chars(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001200{
Jiri Slaby8070e352006-01-09 20:54:22 -08001201 struct isi_port *port = tty->driver_data;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001202
Linus Torvalds1da177e2005-04-16 15:20:36 -07001203 if (isicom_paranoia_check(port, tty->name, "isicom_flush_chars"))
1204 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001205
Jiri Slabya547dfe2006-01-09 20:54:26 -08001206 if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
1207 !port->xmit_buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001208 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001209
Linus Torvalds1da177e2005-04-16 15:20:36 -07001210 /* this tells the transmitter to consider this port for
1211 data output to the card ... that's the best we can do. */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001212 port->status |= ISI_TXOK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001213}
1214
1215/* write_room et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001216static int isicom_write_room(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001217{
Jiri Slaby8070e352006-01-09 20:54:22 -08001218 struct isi_port *port = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001219 int free;
1220
1221 if (isicom_paranoia_check(port, tty->name, "isicom_write_room"))
1222 return 0;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001223
Linus Torvalds1da177e2005-04-16 15:20:36 -07001224 free = SERIAL_XMIT_SIZE - port->xmit_cnt - 1;
1225 if (free < 0)
1226 free = 0;
1227 return free;
1228}
1229
1230/* chars_in_buffer et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001231static int isicom_chars_in_buffer(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001232{
Jiri Slaby8070e352006-01-09 20:54:22 -08001233 struct isi_port *port = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234 if (isicom_paranoia_check(port, tty->name, "isicom_chars_in_buffer"))
1235 return 0;
1236 return port->xmit_cnt;
1237}
1238
1239/* ioctl et all */
Jiri Slabya547dfe2006-01-09 20:54:26 -08001240static inline void isicom_send_break(struct isi_port *port,
1241 unsigned long length)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242{
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001243 struct isi_board *card = port->card;
Jiri Slaby8070e352006-01-09 20:54:22 -08001244 unsigned long base = card->base;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001245
1246 if (!lock_card(card))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001247 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001248
Linus Torvalds1da177e2005-04-16 15:20:36 -07001249 outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base);
1250 outw((length & 0xff) << 8 | 0x00, base);
1251 outw((length & 0xff00), base);
1252 InterruptTheCard(base);
1253
1254 unlock_card(card);
1255}
1256
1257static int isicom_tiocmget(struct tty_struct *tty, struct file *file)
1258{
Jiri Slaby8070e352006-01-09 20:54:22 -08001259 struct isi_port *port = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001260 /* just send the port status */
Jiri Slaby8070e352006-01-09 20:54:22 -08001261 u16 status = port->status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001262
1263 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1264 return -ENODEV;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001265
Linus Torvalds1da177e2005-04-16 15:20:36 -07001266 return ((status & ISI_RTS) ? TIOCM_RTS : 0) |
1267 ((status & ISI_DTR) ? TIOCM_DTR : 0) |
1268 ((status & ISI_DCD) ? TIOCM_CAR : 0) |
1269 ((status & ISI_DSR) ? TIOCM_DSR : 0) |
1270 ((status & ISI_CTS) ? TIOCM_CTS : 0) |
1271 ((status & ISI_RI ) ? TIOCM_RI : 0);
1272}
1273
1274static int isicom_tiocmset(struct tty_struct *tty, struct file *file,
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001275 unsigned int set, unsigned int clear)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001276{
Jiri Slaby8070e352006-01-09 20:54:22 -08001277 struct isi_port *port = tty->driver_data;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001278
Linus Torvalds1da177e2005-04-16 15:20:36 -07001279 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1280 return -ENODEV;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001281
Linus Torvalds1da177e2005-04-16 15:20:36 -07001282 if (set & TIOCM_RTS)
1283 raise_rts(port);
1284 if (set & TIOCM_DTR)
1285 raise_dtr(port);
1286
1287 if (clear & TIOCM_RTS)
1288 drop_rts(port);
1289 if (clear & TIOCM_DTR)
1290 drop_dtr(port);
1291
1292 return 0;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001293}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001294
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001295static int isicom_set_serial_info(struct isi_port *port,
1296 struct serial_struct __user *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001297{
1298 struct serial_struct newinfo;
1299 int reconfig_port;
1300
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001301 if (copy_from_user(&newinfo, info, sizeof(newinfo)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001302 return -EFAULT;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001303
1304 reconfig_port = ((port->flags & ASYNC_SPD_MASK) !=
1305 (newinfo.flags & ASYNC_SPD_MASK));
1306
Linus Torvalds1da177e2005-04-16 15:20:36 -07001307 if (!capable(CAP_SYS_ADMIN)) {
1308 if ((newinfo.close_delay != port->close_delay) ||
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001309 (newinfo.closing_wait != port->closing_wait) ||
1310 ((newinfo.flags & ~ASYNC_USR_MASK) !=
1311 (port->flags & ~ASYNC_USR_MASK)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001312 return -EPERM;
1313 port->flags = ((port->flags & ~ ASYNC_USR_MASK) |
1314 (newinfo.flags & ASYNC_USR_MASK));
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001315 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001316 else {
1317 port->close_delay = newinfo.close_delay;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001318 port->closing_wait = newinfo.closing_wait;
1319 port->flags = ((port->flags & ~ASYNC_FLAGS) |
Linus Torvalds1da177e2005-04-16 15:20:36 -07001320 (newinfo.flags & ASYNC_FLAGS));
1321 }
1322 if (reconfig_port) {
1323 isicom_config_port(port);
1324 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001325 return 0;
1326}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001327
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001328static int isicom_get_serial_info(struct isi_port *port,
1329 struct serial_struct __user *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001330{
1331 struct serial_struct out_info;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001332
Linus Torvalds1da177e2005-04-16 15:20:36 -07001333 memset(&out_info, 0, sizeof(out_info));
1334/* out_info.type = ? */
1335 out_info.line = port - isi_ports;
1336 out_info.port = port->card->base;
1337 out_info.irq = port->card->irq;
1338 out_info.flags = port->flags;
1339/* out_info.baud_base = ? */
1340 out_info.close_delay = port->close_delay;
1341 out_info.closing_wait = port->closing_wait;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001342 if (copy_to_user(info, &out_info, sizeof(out_info)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001343 return -EFAULT;
1344 return 0;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001345}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001346
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001347static int isicom_ioctl(struct tty_struct *tty, struct file *filp,
1348 unsigned int cmd, unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001349{
Jiri Slaby8070e352006-01-09 20:54:22 -08001350 struct isi_port *port = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001351 void __user *argp = (void __user *)arg;
1352 int retval;
1353
1354 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1355 return -ENODEV;
1356
1357 switch(cmd) {
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001358 case TCSBRK:
1359 retval = tty_check_change(tty);
1360 if (retval)
1361 return retval;
1362 tty_wait_until_sent(tty, 0);
1363 if (!arg)
1364 isicom_send_break(port, HZ/4);
1365 return 0;
1366
1367 case TCSBRKP:
1368 retval = tty_check_change(tty);
1369 if (retval)
1370 return retval;
1371 tty_wait_until_sent(tty, 0);
1372 isicom_send_break(port, arg ? arg * (HZ/10) : HZ/4);
1373 return 0;
1374
1375 case TIOCGSOFTCAR:
Jiri Slabya547dfe2006-01-09 20:54:26 -08001376 return put_user(C_CLOCAL(tty) ? 1 : 0,
1377 (unsigned long __user *)argp);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001378
1379 case TIOCSSOFTCAR:
1380 if (get_user(arg, (unsigned long __user *) argp))
1381 return -EFAULT;
1382 tty->termios->c_cflag =
1383 ((tty->termios->c_cflag & ~CLOCAL) |
1384 (arg ? CLOCAL : 0));
1385 return 0;
1386
1387 case TIOCGSERIAL:
1388 return isicom_get_serial_info(port, argp);
1389
1390 case TIOCSSERIAL:
1391 return isicom_set_serial_info(port, argp);
1392
1393 default:
1394 return -ENOIOCTLCMD;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001395 }
1396 return 0;
1397}
1398
1399/* set_termios et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001400static void isicom_set_termios(struct tty_struct *tty,
1401 struct termios *old_termios)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001402{
Jiri Slaby8070e352006-01-09 20:54:22 -08001403 struct isi_port *port = tty->driver_data;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001404
Linus Torvalds1da177e2005-04-16 15:20:36 -07001405 if (isicom_paranoia_check(port, tty->name, "isicom_set_termios"))
1406 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001407
Linus Torvalds1da177e2005-04-16 15:20:36 -07001408 if (tty->termios->c_cflag == old_termios->c_cflag &&
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001409 tty->termios->c_iflag == old_termios->c_iflag)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001410 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001411
Linus Torvalds1da177e2005-04-16 15:20:36 -07001412 isicom_config_port(port);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001413
Linus Torvalds1da177e2005-04-16 15:20:36 -07001414 if ((old_termios->c_cflag & CRTSCTS) &&
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001415 !(tty->termios->c_cflag & CRTSCTS)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001416 tty->hw_stopped = 0;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001417 isicom_start(tty);
1418 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001419}
1420
1421/* throttle et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001422static void isicom_throttle(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001423{
Jiri Slaby8070e352006-01-09 20:54:22 -08001424 struct isi_port *port = tty->driver_data;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001425 struct isi_board *card = port->card;
1426
Linus Torvalds1da177e2005-04-16 15:20:36 -07001427 if (isicom_paranoia_check(port, tty->name, "isicom_throttle"))
1428 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001429
Linus Torvalds1da177e2005-04-16 15:20:36 -07001430 /* tell the card that this port cannot handle any more data for now */
1431 card->port_status &= ~(1 << port->channel);
1432 outw(card->port_status, card->base + 0x02);
1433}
1434
1435/* unthrottle et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001436static void isicom_unthrottle(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001437{
Jiri Slaby8070e352006-01-09 20:54:22 -08001438 struct isi_port *port = tty->driver_data;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001439 struct isi_board *card = port->card;
1440
Linus Torvalds1da177e2005-04-16 15:20:36 -07001441 if (isicom_paranoia_check(port, tty->name, "isicom_unthrottle"))
1442 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001443
Linus Torvalds1da177e2005-04-16 15:20:36 -07001444 /* tell the card that this port is ready to accept more data */
1445 card->port_status |= (1 << port->channel);
1446 outw(card->port_status, card->base + 0x02);
1447}
1448
1449/* stop et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001450static void isicom_stop(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001451{
Jiri Slaby8070e352006-01-09 20:54:22 -08001452 struct isi_port *port = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001453
1454 if (isicom_paranoia_check(port, tty->name, "isicom_stop"))
1455 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001456
Linus Torvalds1da177e2005-04-16 15:20:36 -07001457 /* this tells the transmitter not to consider this port for
1458 data output to the card. */
1459 port->status &= ~ISI_TXOK;
1460}
1461
1462/* start et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001463static void isicom_start(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001464{
Jiri Slaby8070e352006-01-09 20:54:22 -08001465 struct isi_port *port = tty->driver_data;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001466
Linus Torvalds1da177e2005-04-16 15:20:36 -07001467 if (isicom_paranoia_check(port, tty->name, "isicom_start"))
1468 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001469
Linus Torvalds1da177e2005-04-16 15:20:36 -07001470 /* this tells the transmitter to consider this port for
1471 data output to the card. */
1472 port->status |= ISI_TXOK;
1473}
1474
1475/* hangup et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001476static void do_isicom_hangup(void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001477{
Jiri Slaby8070e352006-01-09 20:54:22 -08001478 struct isi_port *port = data;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001479 struct tty_struct *tty;
1480
Linus Torvalds1da177e2005-04-16 15:20:36 -07001481 tty = port->tty;
1482 if (tty)
1483 tty_hangup(tty);
1484}
1485
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001486static void isicom_hangup(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001487{
Jiri Slaby8070e352006-01-09 20:54:22 -08001488 struct isi_port *port = tty->driver_data;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001489
Linus Torvalds1da177e2005-04-16 15:20:36 -07001490 if (isicom_paranoia_check(port, tty->name, "isicom_hangup"))
1491 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001492
Linus Torvalds1da177e2005-04-16 15:20:36 -07001493 isicom_shutdown_port(port);
1494 port->count = 0;
1495 port->flags &= ~ASYNC_NORMAL_ACTIVE;
1496 port->tty = NULL;
1497 wake_up_interruptible(&port->open_wait);
1498}
1499
1500/* flush_buffer et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001501static void isicom_flush_buffer(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001502{
Jiri Slaby8070e352006-01-09 20:54:22 -08001503 struct isi_port *port = tty->driver_data;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001504 struct isi_board *card = port->card;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001505 unsigned long flags;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001506
Linus Torvalds1da177e2005-04-16 15:20:36 -07001507 if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer"))
1508 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001509
Linus Torvalds1da177e2005-04-16 15:20:36 -07001510 spin_lock_irqsave(&card->card_lock, flags);
1511 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
1512 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001513
Linus Torvalds1da177e2005-04-16 15:20:36 -07001514 wake_up_interruptible(&tty->write_wait);
1515 tty_wakeup(tty);
1516}
1517
Jiri Slaby9ac09482006-01-09 20:54:24 -08001518/*
1519 * Driver init and deinit functions
1520 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001521
Jiri Slaby9ac09482006-01-09 20:54:24 -08001522static int __devinit isicom_register_ioregion(struct pci_dev *pdev,
1523 const unsigned int index)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001524{
Jiri Slaby9ac09482006-01-09 20:54:24 -08001525 struct isi_board *board = pci_get_drvdata(pdev);
1526
1527 if (!board->base)
1528 return -EINVAL;
1529
1530 if (!request_region(board->base, 16, ISICOM_NAME)) {
1531 dev_dbg(&pdev->dev, "I/O Region 0x%lx-0x%lx is busy. Card%d "
1532 "will be disabled.\n", board->base, board->base + 15,
1533 index + 1);
1534 return -EBUSY;
1535 }
1536
1537 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001538}
1539
Jiri Slaby9ac09482006-01-09 20:54:24 -08001540static void isicom_unregister_ioregion(struct pci_dev *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001541{
Jiri Slaby9ac09482006-01-09 20:54:24 -08001542 struct isi_board *board = pci_get_drvdata(pdev);
1543
1544 if (!board->base)
1545 return;
1546
1547 release_region(board->base, 16);
1548 dev_dbg(&pdev->dev, "I/O Region 0x%lx-0x%lx released.\n",
1549 board->base, board->base + 15);
1550 board->base = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001551}
1552
1553static struct tty_operations isicom_ops = {
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001554 .open = isicom_open,
1555 .close = isicom_close,
1556 .write = isicom_write,
1557 .put_char = isicom_put_char,
1558 .flush_chars = isicom_flush_chars,
1559 .write_room = isicom_write_room,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001560 .chars_in_buffer = isicom_chars_in_buffer,
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001561 .ioctl = isicom_ioctl,
1562 .set_termios = isicom_set_termios,
1563 .throttle = isicom_throttle,
1564 .unthrottle = isicom_unthrottle,
1565 .stop = isicom_stop,
1566 .start = isicom_start,
1567 .hangup = isicom_hangup,
1568 .flush_buffer = isicom_flush_buffer,
1569 .tiocmget = isicom_tiocmget,
1570 .tiocmset = isicom_tiocmset,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001571};
1572
Jiri Slabyaaa246e2006-01-09 20:54:23 -08001573static int __devinit isicom_register_tty_driver(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001574{
Jiri Slabyaaa246e2006-01-09 20:54:23 -08001575 int error = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001576
1577 /* tty driver structure initialization */
1578 isicom_normal = alloc_tty_driver(PORT_COUNT);
1579 if (!isicom_normal)
Jiri Slabyaaa246e2006-01-09 20:54:23 -08001580 goto end;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001581
Jiri Slabyaaa246e2006-01-09 20:54:23 -08001582 isicom_normal->owner = THIS_MODULE;
1583 isicom_normal->name = "ttyM";
Jiri Slabyaaa246e2006-01-09 20:54:23 -08001584 isicom_normal->major = ISICOM_NMAJOR;
1585 isicom_normal->minor_start = 0;
1586 isicom_normal->type = TTY_DRIVER_TYPE_SERIAL;
1587 isicom_normal->subtype = SERIAL_TYPE_NORMAL;
1588 isicom_normal->init_termios = tty_std_termios;
1589 isicom_normal->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL |
1590 CLOCAL;
1591 isicom_normal->flags = TTY_DRIVER_REAL_RAW;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001592 tty_set_operations(isicom_normal, &isicom_ops);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001593
Jiri Slabyaaa246e2006-01-09 20:54:23 -08001594 if ((error = tty_register_driver(isicom_normal))) {
1595 pr_dbg("Couldn't register the dialin driver, error=%d\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001596 error);
1597 put_tty_driver(isicom_normal);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001598 }
Jiri Slabyaaa246e2006-01-09 20:54:23 -08001599end:
1600 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001601}
1602
Jiri Slabyaaa246e2006-01-09 20:54:23 -08001603static void isicom_unregister_tty_driver(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001604{
Jiri Slabyaaa246e2006-01-09 20:54:23 -08001605 int error;
1606
1607 if ((error = tty_unregister_driver(isicom_normal)))
1608 pr_dbg("couldn't unregister normal driver, error=%d.\n", error);
1609
Linus Torvalds1da177e2005-04-16 15:20:36 -07001610 put_tty_driver(isicom_normal);
1611}
1612
Jiri Slaby9ac09482006-01-09 20:54:24 -08001613static int __devinit isicom_register_isr(struct pci_dev *pdev,
1614 const unsigned int index)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001615{
Jiri Slaby9ac09482006-01-09 20:54:24 -08001616 struct isi_board *board = pci_get_drvdata(pdev);
1617 unsigned long irqflags = SA_INTERRUPT;
1618 int retval = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001619
Jiri Slaby9ac09482006-01-09 20:54:24 -08001620 if (!board->base)
1621 goto end;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001622
Jiri Slaby9ac09482006-01-09 20:54:24 -08001623 if (board->isa == NO)
1624 irqflags |= SA_SHIRQ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001625
Jiri Slaby9ac09482006-01-09 20:54:24 -08001626 retval = request_irq(board->irq, isicom_interrupt, irqflags,
1627 ISICOM_NAME, board);
1628 if (retval < 0)
1629 dev_warn(&pdev->dev, "Could not install handler at Irq %d. "
1630 "Card%d will be disabled.\n", board->irq, index + 1);
1631 else
1632 retval = 0;
1633end:
1634 return retval;
1635}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001636
Jiri Slaby9ac09482006-01-09 20:54:24 -08001637static int __devinit reset_card(struct pci_dev *pdev,
1638 const unsigned int card, unsigned int *signature)
1639{
1640 struct isi_board *board = pci_get_drvdata(pdev);
1641 unsigned long base = board->base;
1642 unsigned int portcount = 0;
1643 int retval = 0;
1644
1645 dev_dbg(&pdev->dev, "ISILoad:Resetting Card%d at 0x%lx\n", card + 1,
1646 base);
1647
1648 inw(base + 0x8);
1649
1650 mdelay(10);
1651
1652 outw(0, base + 0x8); /* Reset */
1653
1654 msleep(3000);
1655
1656 *signature = inw(base + 0x4) & 0xff;
1657
1658 if (board->isa == YES) {
1659 if (!(inw(base + 0xe) & 0x1) || (inw(base + 0x2))) {
1660 dev_dbg(&pdev->dev, "base+0x2=0x%lx, base+0xe=0x%lx\n",
1661 inw(base + 0x2), inw(base + 0xe));
1662 dev_err(&pdev->dev, "ISILoad:ISA Card%d reset failure "
1663 "(Possible bad I/O Port Address 0x%lx).\n",
1664 card + 1, base);
1665 retval = -EIO;
1666 goto end;
1667 }
1668 } else {
1669 portcount = inw(base + 0x2);
1670 if (!(inw(base + 0xe) & 0x1) || ((portcount != 0) &&
1671 (portcount != 4) && (portcount != 8))) {
1672 dev_dbg(&pdev->dev, "base+0x2=0x%lx, base+0xe=0x%lx\n",
1673 inw(base + 0x2), inw(base + 0xe));
1674 dev_err(&pdev->dev, "ISILoad:PCI Card%d reset failure "
1675 "(Possible bad I/O Port Address 0x%lx).\n",
1676 card + 1, base);
1677 retval = -EIO;
1678 goto end;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001679 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001680 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001681
Jiri Slaby9ac09482006-01-09 20:54:24 -08001682 switch (*signature) {
1683 case 0xa5:
1684 case 0xbb:
1685 case 0xdd:
1686 board->port_count = (board->isa == NO && portcount == 4) ? 4 :
1687 8;
1688 board->shift_count = 12;
1689 break;
1690 case 0xcc:
1691 board->port_count = 16;
1692 board->shift_count = 11;
1693 break;
1694 default:
1695 dev_warn(&pdev->dev, "ISILoad:Card%d reset failure (Possible "
1696 "bad I/O Port Address 0x%lx).\n", card + 1, base);
1697 dev_dbg(&pdev->dev, "Sig=0x%lx\n", signature);
1698 retval = -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001699 }
Jiri Slaby9ac09482006-01-09 20:54:24 -08001700 dev_info(&pdev->dev, "-Done\n");
1701
1702end:
1703 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001704}
1705
Jiri Slabye65c1db2006-01-09 20:54:25 -08001706static inline int WaitTillCardIsFree(u16 base)
1707{
1708 unsigned long count = 0;
1709
1710 while (!(inw(base + 0xe) & 0x1) && count++ < 100)
1711 msleep(5);
1712
1713 return !(inw(base + 0xe) & 0x1);
1714}
1715
1716static int __devinit load_firmware(struct pci_dev *pdev,
1717 const unsigned int index, const unsigned int signature)
1718{
1719 struct isi_board *board = pci_get_drvdata(pdev);
1720 const struct firmware *fw;
1721 unsigned long base = board->base;
1722 unsigned int a;
1723 u16 word_count, status;
1724 int retval = -EIO;
1725 char *name;
1726 u8 *data;
1727
1728 struct stframe {
1729 u16 addr;
1730 u16 count;
1731 u8 data[0];
1732 } *frame;
1733
1734 switch (signature) {
1735 case 0xa5:
1736 name = "isi608.bin";
1737 break;
1738 case 0xbb:
1739 name = "isi608em.bin";
1740 break;
1741 case 0xcc:
1742 name = "isi616em.bin";
1743 break;
1744 case 0xdd:
1745 name = "isi4608.bin";
1746 break;
1747 case 0xee:
1748 name = "isi4616.bin";
1749 break;
1750 default:
1751 dev_err(&pdev->dev, "Unknown signature.\n");
1752 goto end;
1753 }
1754
1755 retval = request_firmware(&fw, name, &pdev->dev);
1756 if (retval)
1757 goto end;
1758
1759 for (frame = (struct stframe *)fw->data;
1760 frame < (struct stframe *)(fw->data + fw->size);
1761 frame++) {
1762 if (WaitTillCardIsFree(base))
1763 goto errrelfw;
1764
1765 outw(0xf0, base); /* start upload sequence */
1766 outw(0x00, base);
1767 outw(frame->addr, base); /* lsb of address */
1768
1769 word_count = frame->count / 2 + frame->count % 2;
1770 outw(word_count, base);
1771 InterruptTheCard(base);
1772
1773 udelay(100); /* 0x2f */
1774
1775 if (WaitTillCardIsFree(base))
1776 goto errrelfw;
1777
1778 if ((status = inw(base + 0x4)) != 0) {
1779 dev_warn(&pdev->dev, "Card%d rejected load header:\n"
1780 "Address:0x%x\nCount:0x%x\nStatus:0x%x\n",
1781 index + 1, frame->addr, frame->count, status);
1782 goto errrelfw;
1783 }
1784 outsw(base, frame->data, word_count);
1785
1786 InterruptTheCard(base);
1787
1788 udelay(50); /* 0x0f */
1789
1790 if (WaitTillCardIsFree(base))
1791 goto errrelfw;
1792
1793 if ((status = inw(base + 0x4)) != 0) {
1794 dev_err(&pdev->dev, "Card%d got out of sync.Card "
1795 "Status:0x%x\n", index + 1, status);
1796 goto errrelfw;
1797 }
1798 }
1799
1800 retval = -EIO;
1801
1802 if (WaitTillCardIsFree(base))
1803 goto errrelfw;
1804
1805 outw(0xf2, base);
1806 outw(0x800, base);
1807 outw(0x0, base);
1808 outw(0x0, base);
1809 InterruptTheCard(base);
1810 outw(0x0, base + 0x4); /* for ISI4608 cards */
1811
1812/* XXX: should we test it by reading it back and comparing with original like
1813 * in load firmware package? */
1814 for (frame = (struct stframe*)fw->data;
1815 frame < (struct stframe*)(fw->data + fw->size);
1816 frame++) {
1817 if (WaitTillCardIsFree(base))
1818 goto errrelfw;
1819
1820 outw(0xf1, base); /* start download sequence */
1821 outw(0x00, base);
1822 outw(frame->addr, base); /* lsb of address */
1823
1824 word_count = (frame->count >> 1) + frame->count % 2;
1825 outw(word_count + 1, base);
1826 InterruptTheCard(base);
1827
1828 udelay(50); /* 0xf */
1829
1830 if (WaitTillCardIsFree(base))
1831 goto errrelfw;
1832
1833 if ((status = inw(base + 0x4)) != 0) {
1834 dev_warn(&pdev->dev, "Card%d rejected verify header:\n"
1835 "Address:0x%x\nCount:0x%x\nStatus: 0x%x\n",
1836 index + 1, frame->addr, frame->count, status);
1837 goto errrelfw;
1838 }
1839
1840 data = kmalloc(word_count * 2, GFP_KERNEL);
1841 inw(base);
1842 insw(base, data, word_count);
1843 InterruptTheCard(base);
1844
1845 for (a = 0; a < frame->count; a++)
1846 if (data[a] != frame->data[a]) {
1847 kfree(data);
1848 dev_err(&pdev->dev, "Card%d, firmware upload "
1849 "failed\n", index + 1);
1850 goto errrelfw;
1851 }
1852 kfree(data);
1853
1854 udelay(50); /* 0xf */
1855
1856 if (WaitTillCardIsFree(base))
1857 goto errrelfw;
1858
1859 if ((status = inw(base + 0x4)) != 0) {
1860 dev_err(&pdev->dev, "Card%d verify got out of sync. "
1861 "Card Status:0x%x\n", index + 1, status);
1862 goto errrelfw;
1863 }
1864 }
1865
1866 board->status |= FIRMWARE_LOADED;
1867 retval = 0;
1868
1869errrelfw:
1870 release_firmware(fw);
1871end:
1872 return retval;
1873}
1874
Jiri Slaby9ac09482006-01-09 20:54:24 -08001875/*
1876 * Insmod can set static symbols so keep these static
1877 */
1878static int io[4];
1879static int irq[4];
1880static int card;
1881
1882static int __devinit isicom_probe(struct pci_dev *pdev,
1883 const struct pci_device_id *ent)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001884{
Jiri Slaby9ac09482006-01-09 20:54:24 -08001885 unsigned int ioaddr, signature, index;
1886 int retval = -EPERM;
1887 u8 pciirq;
1888 struct isi_board *board = NULL;
1889
1890 if (card >= BOARD_COUNT)
1891 goto err;
1892
1893 ioaddr = pci_resource_start(pdev, 3);
1894 /* i.e at offset 0x1c in the PCI configuration register space. */
1895 pciirq = pdev->irq;
1896 dev_info(&pdev->dev, "ISI PCI Card(Device ID 0x%x)\n", ent->device);
1897
1898 /* allot the first empty slot in the array */
1899 for (index = 0; index < BOARD_COUNT; index++)
1900 if (isi_card[index].base == 0) {
1901 board = &isi_card[index];
1902 break;
1903 }
1904
1905 board->base = ioaddr;
1906 board->irq = pciirq;
1907 board->isa = NO;
1908 card++;
1909
1910 pci_set_drvdata(pdev, board);
1911
1912 retval = isicom_register_ioregion(pdev, index);
1913 if (retval < 0)
1914 goto err;
1915
1916 retval = isicom_register_isr(pdev, index);
1917 if (retval < 0)
1918 goto errunrr;
1919
1920 retval = reset_card(pdev, index, &signature);
1921 if (retval < 0)
1922 goto errunri;
1923
Jiri Slabye65c1db2006-01-09 20:54:25 -08001924 retval = load_firmware(pdev, index, signature);
1925 if (retval < 0)
1926 goto errunri;
1927
Jiri Slaby9ac09482006-01-09 20:54:24 -08001928 return 0;
1929
1930errunri:
1931 free_irq(board->irq, board);
1932errunrr:
1933 isicom_unregister_ioregion(pdev);
1934err:
1935 board->base = 0;
1936 return retval;
1937}
1938
1939static void __devexit isicom_remove(struct pci_dev *pdev)
1940{
1941 struct isi_board *board = pci_get_drvdata(pdev);
1942
1943 free_irq(board->irq, board);
1944 isicom_unregister_ioregion(pdev);
1945}
1946
1947static int __devinit isicom_setup(void)
1948{
1949 int retval, idx, channel;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001950 struct isi_port *port;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001951
Jiri Slaby9ac09482006-01-09 20:54:24 -08001952 card = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001953 memset(isi_ports, 0, sizeof(isi_ports));
Jiri Slaby9ac09482006-01-09 20:54:24 -08001954
1955 for(idx = 0; idx < BOARD_COUNT; idx++) {
1956 port = &isi_ports[idx * 16];
1957 isi_card[idx].ports = port;
1958 spin_lock_init(&isi_card[idx].card_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001959 for (channel = 0; channel < 16; channel++, port++) {
1960 port->magic = ISICOM_MAGIC;
Jiri Slaby9ac09482006-01-09 20:54:24 -08001961 port->card = &isi_card[idx];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001962 port->channel = channel;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001963 port->close_delay = 50 * HZ/100;
1964 port->closing_wait = 3000 * HZ/100;
1965 INIT_WORK(&port->hangup_tq, do_isicom_hangup, port);
1966 INIT_WORK(&port->bh_tqueue, isicom_bottomhalf, port);
1967 port->status = 0;
1968 init_waitqueue_head(&port->open_wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001969 init_waitqueue_head(&port->close_wait);
1970 /* . . . */
Jiri Slaby9ac09482006-01-09 20:54:24 -08001971 }
1972 isi_card[idx].base = 0;
1973 isi_card[idx].irq = 0;
1974
1975 if (!io[idx])
1976 continue;
1977
1978 if (irq[idx] == 2 || irq[idx] == 3 || irq[idx] == 4 ||
1979 irq[idx] == 5 || irq[idx] == 7 ||
1980 irq[idx] == 10 || irq[idx] == 11 ||
1981 irq[idx] == 12 || irq[idx] == 15) {
1982 printk(KERN_ERR "ISICOM: ISA not supported yet.\n");
1983 retval = -EINVAL;
1984 goto error;
1985 } else
1986 printk(KERN_ERR "ISICOM: Irq %d unsupported. "
1987 "Disabling Card%d...\n", irq[idx], idx + 1);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001988 }
1989
Jiri Slaby9ac09482006-01-09 20:54:24 -08001990 retval = isicom_register_tty_driver();
1991 if (retval < 0)
1992 goto error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001993
Jiri Slaby9ac09482006-01-09 20:54:24 -08001994 retval = pci_register_driver(&isicom_driver);
1995 if (retval < 0) {
1996 printk(KERN_ERR "ISICOM: Unable to register pci driver.\n");
1997 goto errtty;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001998 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001999
Linus Torvalds1da177e2005-04-16 15:20:36 -07002000 init_timer(&tx);
2001 tx.expires = jiffies + 1;
2002 tx.data = 0;
2003 tx.function = isicom_tx;
2004 re_schedule = 1;
2005 add_timer(&tx);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08002006
Linus Torvalds1da177e2005-04-16 15:20:36 -07002007 return 0;
Jiri Slaby9ac09482006-01-09 20:54:24 -08002008errtty:
2009 isicom_unregister_tty_driver();
2010error:
2011 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002012}
2013
2014static void __exit isicom_exit(void)
2015{
Jiri Slabyaaa246e2006-01-09 20:54:23 -08002016 unsigned int index = 0;
2017
Linus Torvalds1da177e2005-04-16 15:20:36 -07002018 re_schedule = 0;
Jiri Slabyaaa246e2006-01-09 20:54:23 -08002019
2020 while (re_schedule != 2 && index++ < 100)
2021 msleep(10);
2022
Jiri Slaby9ac09482006-01-09 20:54:24 -08002023 pci_unregister_driver(&isicom_driver);
Jiri Slabyaaa246e2006-01-09 20:54:23 -08002024 isicom_unregister_tty_driver();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002025}
2026
2027module_init(isicom_setup);
2028module_exit(isicom_exit);
Jiri Slabyaaa246e2006-01-09 20:54:23 -08002029
2030MODULE_AUTHOR("MultiTech");
2031MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech");
2032MODULE_LICENSE("GPL");
2033module_param_array(io, int, NULL, 0);
2034MODULE_PARM_DESC(io, "I/O ports for the cards");
2035module_param_array(irq, int, NULL, 0);
2036MODULE_PARM_DESC(irq, "Interrupts for the cards");