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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
Alan Cox8eb04cf2008-11-11 14:48:44 +000010 * 1/9/98 alan@lxorguk.ukuu.org.uk
11 * Merge to 2.0.x kernel tree
Linus Torvalds1da177e2005-04-16 15:20:36 -070012 * Obtain and use official major/minors
13 * Loader switched to a misc device
14 * (fixed range check bug as a side effect)
15 * Printk clean up
Alan Cox8eb04cf2008-11-11 14:48:44 +000016 * 9/12/98 alan@lxorguk.ukuu.org.uk
17 * Rough port to 2.1.x
Linus Torvalds1da177e2005-04-16 15:20:36 -070018 *
19 * 10/6/99 sameer Merged the ISA and PCI drivers to
20 * a new unified driver.
21 *
22 * 3/9/99 sameer Added support for ISI4616 cards.
23 *
24 * 16/9/99 sameer We do not force RTS low anymore.
Jiri Slabyd8d16e42006-01-09 20:54:21 -080025 * This is to prevent the firmware
Linus Torvalds1da177e2005-04-16 15:20:36 -070026 * from getting confused.
27 *
28 * 26/10/99 sameer Cosmetic changes:The driver now
29 * dumps the Port Count information
30 * along with I/O address and IRQ.
31 *
32 * 13/12/99 sameer Fixed the problem with IRQ sharing.
33 *
34 * 10/5/00 sameer Fixed isicom_shutdown_board()
35 * to not lower DTR on all the ports
Jiri Slabyd8d16e42006-01-09 20:54:21 -080036 * when the last port on the card is
Linus Torvalds1da177e2005-04-16 15:20:36 -070037 * closed.
38 *
39 * 10/5/00 sameer Signal mask setup command added
Jiri Slabyd8d16e42006-01-09 20:54:21 -080040 * to isicom_setup_port and
Linus Torvalds1da177e2005-04-16 15:20:36 -070041 * isicom_shutdown_port.
42 *
43 * 24/5/00 sameer The driver is now SMP aware.
Jiri Slabyd8d16e42006-01-09 20:54:21 -080044 *
45 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070046 * 27/11/00 Vinayak P Risbud Fixed the Driver Crash Problem
Jiri Slabyd8d16e42006-01-09 20:54:21 -080047 *
48 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070049 * 03/01/01 anil .s Added support for resetting the
50 * internal modems on ISI cards.
51 *
52 * 08/02/01 anil .s Upgraded the driver for kernel
53 * 2.4.x
54 *
Jiri Slabyd8d16e42006-01-09 20:54:21 -080055 * 11/04/01 Kevin Fixed firmware load problem with
Linus Torvalds1da177e2005-04-16 15:20:36 -070056 * ISIHP-4X card
Jiri Slabyd8d16e42006-01-09 20:54:21 -080057 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070058 * 30/04/01 anil .s Fixed the remote login through
59 * ISI port problem. Now the link
60 * does not go down before password
61 * prompt.
62 *
63 * 03/05/01 anil .s Fixed the problem with IRQ sharing
64 * among ISI-PCI cards.
65 *
66 * 03/05/01 anil .s Added support to display the version
Jiri Slabyd8d16e42006-01-09 20:54:21 -080067 * info during insmod as well as module
Linus Torvalds1da177e2005-04-16 15:20:36 -070068 * listing by lsmod.
Jiri Slabyd8d16e42006-01-09 20:54:21 -080069 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070070 * 10/05/01 anil .s Done the modifications to the source
71 * file and Install script so that the
72 * same installation can be used for
73 * 2.2.x and 2.4.x kernel.
74 *
75 * 06/06/01 anil .s Now we drop both dtr and rts during
76 * shutdown_port as well as raise them
77 * during isicom_config_port.
Jiri Slabyd8d16e42006-01-09 20:54:21 -080078 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070079 * 09/06/01 acme@conectiva.com.br use capable, not suser, do
80 * restore_flags on failure in
81 * isicom_send_break, verify put_user
82 * result
83 *
Jiri Slabyd8d16e42006-01-09 20:54:21 -080084 * 11/02/03 ranjeeth Added support for 230 Kbps and 460 Kbps
85 * Baud index extended to 21
86 *
87 * 20/03/03 ranjeeth Made to work for Linux Advanced server.
88 * Taken care of license warning.
89 *
90 * 10/12/03 Ravindra Made to work for Fedora Core 1 of
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 * Red Hat Distribution
92 *
93 * 06/01/05 Alan Cox Merged the ISI and base kernel strands
94 * into a single 2.6 driver
95 *
96 * ***********************************************************
97 *
Jiri Slabyd8d16e42006-01-09 20:54:21 -080098 * To use this driver you also need the support package. You
Linus Torvalds1da177e2005-04-16 15:20:36 -070099 * can find this in RPM format on
100 * ftp://ftp.linux.org.uk/pub/linux/alan
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800101 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102 * You can find the original tools for this direct from Multitech
103 * ftp://ftp.multitech.com/ISI-Cards/
104 *
105 * Having installed the cards the module options (/etc/modprobe.conf)
106 *
107 * options isicom io=card1,card2,card3,card4 irq=card1,card2,card3,card4
108 *
109 * Omit those entries for boards you don't have installed.
110 *
111 * TODO
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112 * Merge testing
113 * 64-bit verification
114 */
115
116#include <linux/module.h>
Jiri Slabye65c1db2006-01-09 20:54:25 -0800117#include <linux/firmware.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118#include <linux/kernel.h>
119#include <linux/tty.h>
Alan Cox33f0f882006-01-09 20:54:13 -0800120#include <linux/tty_flip.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121#include <linux/termios.h>
122#include <linux/fs.h>
123#include <linux/sched.h>
124#include <linux/serial.h>
125#include <linux/mm.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126#include <linux/interrupt.h>
127#include <linux/timer.h>
128#include <linux/delay.h>
129#include <linux/ioport.h>
130
Alan Cox251b8dd2008-04-30 00:54:12 -0700131#include <linux/uaccess.h>
132#include <linux/io.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133#include <asm/system.h>
134
135#include <linux/pci.h>
136
137#include <linux/isicom.h>
138
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800139#define InterruptTheCard(base) outw(0, (base) + 0xc)
140#define ClearInterrupt(base) inw((base) + 0x0a)
141
Jiri Slaby73b52572007-05-08 00:36:29 -0700142#define pr_dbg(str...) pr_debug("ISICOM: " str)
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800143#ifdef DEBUG
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800144#define isicom_paranoia_check(a, b, c) __isicom_paranoia_check((a), (b), (c))
145#else
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800146#define isicom_paranoia_check(a, b, c) 0
147#endif
148
Jiri Slaby9ac09482006-01-09 20:54:24 -0800149static int isicom_probe(struct pci_dev *, const struct pci_device_id *);
150static void __devexit isicom_remove(struct pci_dev *);
151
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152static struct pci_device_id isicom_pci_tbl[] = {
Jiri Slaby9ac09482006-01-09 20:54:24 -0800153 { PCI_DEVICE(VENDOR_ID, 0x2028) },
154 { PCI_DEVICE(VENDOR_ID, 0x2051) },
155 { PCI_DEVICE(VENDOR_ID, 0x2052) },
156 { PCI_DEVICE(VENDOR_ID, 0x2053) },
157 { PCI_DEVICE(VENDOR_ID, 0x2054) },
158 { PCI_DEVICE(VENDOR_ID, 0x2055) },
159 { PCI_DEVICE(VENDOR_ID, 0x2056) },
160 { PCI_DEVICE(VENDOR_ID, 0x2057) },
161 { PCI_DEVICE(VENDOR_ID, 0x2058) },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 { 0 }
163};
164MODULE_DEVICE_TABLE(pci, isicom_pci_tbl);
165
Jiri Slaby9ac09482006-01-09 20:54:24 -0800166static struct pci_driver isicom_driver = {
167 .name = "isicom",
168 .id_table = isicom_pci_tbl,
169 .probe = isicom_probe,
170 .remove = __devexit_p(isicom_remove)
171};
172
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173static int prev_card = 3; /* start servicing isi_card[0] */
174static struct tty_driver *isicom_normal;
175
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176static void isicom_tx(unsigned long _data);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800177static void isicom_start(struct tty_struct *tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178
Jiri Slaby34b55b82006-12-08 02:38:55 -0800179static DEFINE_TIMER(tx, isicom_tx, 0, 0);
180
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181/* baud index mappings from linux defns to isi */
182
183static signed char linuxb_to_isib[] = {
Jiri Slaby7edc1362007-02-10 01:44:54 -0800184 -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 16, 17, 18, 19, 20, 21
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185};
186
187struct isi_board {
Jiri Slaby8070e352006-01-09 20:54:22 -0800188 unsigned long base;
Jiri Slaby4969b3a2007-07-17 04:05:18 -0700189 int irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 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;
Alan Cox251b8dd2008-04-30 00:54:12 -0700194 struct isi_port *ports;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195 signed char count;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196 spinlock_t card_lock; /* Card wide lock 11/5/00 -sameer */
197 unsigned long flags;
Jiri Slaby938a7022006-12-08 02:38:52 -0800198 unsigned int index;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199};
200
201struct isi_port {
202 unsigned short magic;
Alan Coxf1d03222008-07-16 21:55:45 +0100203 struct tty_port port;
Jiri Slaby8070e352006-01-09 20:54:22 -0800204 u16 channel;
205 u16 status;
Alan Cox251b8dd2008-04-30 00:54:12 -0700206 struct isi_board *card;
Alan Cox251b8dd2008-04-30 00:54:12 -0700207 unsigned char *xmit_buf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 int xmit_head;
209 int xmit_tail;
210 int xmit_cnt;
211};
212
213static struct isi_board isi_card[BOARD_COUNT];
214static struct isi_port isi_ports[PORT_COUNT];
215
216/*
217 * Locking functions for card level locking. We need to own both
218 * the kernel lock for the card and have the card in a position that
219 * it wants to talk.
220 */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800221
Jiri Slaby4969b3a2007-07-17 04:05:18 -0700222static inline int WaitTillCardIsFree(unsigned long base)
Jiri Slabycfe7c09a2006-12-29 16:48:00 -0800223{
224 unsigned int count = 0;
225 unsigned int a = in_atomic(); /* do we run under spinlock? */
226
227 while (!(inw(base + 0xe) & 0x1) && count++ < 100)
228 if (a)
229 mdelay(1);
230 else
231 msleep(1);
232
233 return !(inw(base + 0xe) & 0x1);
234}
235
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236static int lock_card(struct isi_board *card)
237{
Jiri Slaby8070e352006-01-09 20:54:22 -0800238 unsigned long base = card->base;
Jiri Slaby5b21f9d2007-07-17 04:05:17 -0700239 unsigned int retries, a;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240
Jiri Slaby5b21f9d2007-07-17 04:05:17 -0700241 for (retries = 0; retries < 10; retries++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242 spin_lock_irqsave(&card->card_lock, card->flags);
Jiri Slaby5b21f9d2007-07-17 04:05:17 -0700243 for (a = 0; a < 10; a++) {
244 if (inw(base + 0xe) & 0x1)
245 return 1;
246 udelay(10);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 }
Jiri Slaby5b21f9d2007-07-17 04:05:17 -0700248 spin_unlock_irqrestore(&card->card_lock, card->flags);
249 msleep(10);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250 }
Jiri Slabya547dfe2006-01-09 20:54:26 -0800251 printk(KERN_WARNING "ISICOM: Failed to lock Card (0x%lx)\n",
252 card->base);
253
Adrian Bunk04187262006-06-30 18:23:04 +0200254 return 0; /* Failed to acquire the card! */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255}
256
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257static void unlock_card(struct isi_board *card)
258{
259 spin_unlock_irqrestore(&card->card_lock, card->flags);
260}
261
262/*
263 * ISI Card specific ops ...
264 */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800265
Jiri Slabycfe7c09a2006-12-29 16:48:00 -0800266/* card->lock HAS to be held */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800267static void raise_dtr(struct isi_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268{
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800269 struct isi_board *card = port->card;
Jiri Slaby8070e352006-01-09 20:54:22 -0800270 unsigned long base = card->base;
271 u16 channel = port->channel;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272
Jiri Slabycfe7c09a2006-12-29 16:48:00 -0800273 if (WaitTillCardIsFree(base))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274 return;
275
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800276 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277 outw(0x0504, base);
278 InterruptTheCard(base);
279 port->status |= ISI_DTR;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280}
281
Jiri Slabycfe7c09a2006-12-29 16:48:00 -0800282/* card->lock HAS to be held */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800283static inline void drop_dtr(struct isi_port *port)
284{
285 struct isi_board *card = port->card;
Jiri Slaby8070e352006-01-09 20:54:22 -0800286 unsigned long base = card->base;
287 u16 channel = port->channel;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288
Jiri Slabycfe7c09a2006-12-29 16:48:00 -0800289 if (WaitTillCardIsFree(base))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290 return;
291
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800292 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293 outw(0x0404, base);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800294 InterruptTheCard(base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 port->status &= ~ISI_DTR;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296}
297
Jiri Slabycfe7c09a2006-12-29 16:48:00 -0800298/* card->lock HAS to be held */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800299static inline void raise_rts(struct isi_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300{
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800301 struct isi_board *card = port->card;
Jiri Slaby8070e352006-01-09 20:54:22 -0800302 unsigned long base = card->base;
303 u16 channel = port->channel;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304
Jiri Slabycfe7c09a2006-12-29 16:48:00 -0800305 if (WaitTillCardIsFree(base))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 return;
307
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800308 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309 outw(0x0a04, base);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800310 InterruptTheCard(base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311 port->status |= ISI_RTS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312}
Jiri Slabycfe7c09a2006-12-29 16:48:00 -0800313
314/* card->lock HAS to be held */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800315static inline void drop_rts(struct isi_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316{
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800317 struct isi_board *card = port->card;
Jiri Slaby8070e352006-01-09 20:54:22 -0800318 unsigned long base = card->base;
319 u16 channel = port->channel;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320
Jiri Slabycfe7c09a2006-12-29 16:48:00 -0800321 if (WaitTillCardIsFree(base))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322 return;
323
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800324 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325 outw(0x0804, base);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800326 InterruptTheCard(base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327 port->status &= ~ISI_RTS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328}
329
Jiri Slabycfe7c09a2006-12-29 16:48:00 -0800330/* card->lock MUST NOT be held */
Alan Cox5d951fb2009-01-02 13:45:19 +0000331
Alan Coxfcc8ac12009-06-11 12:24:17 +0100332static void isicom_dtr_rts(struct tty_port *port, int on)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333{
Alan Cox5d951fb2009-01-02 13:45:19 +0000334 struct isi_port *ip = container_of(port, struct isi_port, port);
335 struct isi_board *card = ip->card;
Jiri Slaby8070e352006-01-09 20:54:22 -0800336 unsigned long base = card->base;
Alan Cox5d951fb2009-01-02 13:45:19 +0000337 u16 channel = ip->channel;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338
339 if (!lock_card(card))
340 return;
341
Alan Coxfcc8ac12009-06-11 12:24:17 +0100342 if (on) {
343 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
344 outw(0x0f04, base);
345 InterruptTheCard(base);
346 ip->status |= (ISI_DTR | ISI_RTS);
347 } else {
348 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
349 outw(0x0C04, base);
350 InterruptTheCard(base);
351 ip->status &= ~(ISI_DTR | ISI_RTS);
352 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353 unlock_card(card);
354}
355
Jiri Slabycfe7c09a2006-12-29 16:48:00 -0800356/* card->lock HAS to be held */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800357static void drop_dtr_rts(struct isi_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358{
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800359 struct isi_board *card = port->card;
Jiri Slaby8070e352006-01-09 20:54:22 -0800360 unsigned long base = card->base;
361 u16 channel = port->channel;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362
Jiri Slabycfe7c09a2006-12-29 16:48:00 -0800363 if (WaitTillCardIsFree(base))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364 return;
365
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800366 outw(0x8000 | (channel << card->shift_count) | 0x02, base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367 outw(0x0c04, base);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800368 InterruptTheCard(base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369 port->status &= ~(ISI_RTS | ISI_DTR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370}
371
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372/*
373 * ISICOM Driver specific routines ...
374 *
375 */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800376
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800377static inline int __isicom_paranoia_check(struct isi_port const *port,
378 char *name, const char *routine)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380 if (!port) {
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800381 printk(KERN_WARNING "ISICOM: Warning: bad isicom magic for "
382 "dev %s in %s.\n", name, routine);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383 return 1;
384 }
385 if (port->magic != ISICOM_MAGIC) {
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800386 printk(KERN_WARNING "ISICOM: Warning: NULL isicom port for "
387 "dev %s in %s.\n", name, routine);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388 return 1;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800389 }
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800390
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391 return 0;
392}
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800393
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394/*
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800395 * Transmitter.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396 *
397 * We shovel data into the card buffers on a regular basis. The card
398 * will do the rest of the work for us.
399 */
400
401static void isicom_tx(unsigned long _data)
402{
Jiri Slaby4969b3a2007-07-17 04:05:18 -0700403 unsigned long flags, base;
Jiri Slaby5b21f9d2007-07-17 04:05:17 -0700404 unsigned int retries;
Jiri Slaby4969b3a2007-07-17 04:05:18 -0700405 short count = (BOARD_COUNT-1), card;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406 short txcount, wrd, residue, word_count, cnt;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800407 struct isi_port *port;
408 struct tty_struct *tty;
409
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 /* find next active board */
411 card = (prev_card + 1) & 0x0003;
Alan Cox251b8dd2008-04-30 00:54:12 -0700412 while (count-- > 0) {
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800413 if (isi_card[card].status & BOARD_ACTIVE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414 break;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800415 card = (card + 1) & 0x0003;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416 }
417 if (!(isi_card[card].status & BOARD_ACTIVE))
418 goto sched_again;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800419
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420 prev_card = card;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800421
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422 count = isi_card[card].port_count;
423 port = isi_card[card].ports;
424 base = isi_card[card].base;
Jiri Slaby5b21f9d2007-07-17 04:05:17 -0700425
426 spin_lock_irqsave(&isi_card[card].card_lock, flags);
427 for (retries = 0; retries < 100; retries++) {
428 if (inw(base + 0xe) & 0x1)
429 break;
430 udelay(2);
431 }
432 if (retries >= 100)
433 goto unlock;
434
Alan Coxd450b5a2008-10-13 10:39:58 +0100435 tty = tty_port_tty_get(&port->port);
436 if (tty == NULL)
437 goto put_unlock;
438
Alan Cox251b8dd2008-04-30 00:54:12 -0700439 for (; count > 0; count--, port++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440 /* port not active or tx disabled to force flow control */
Alan Coxf1d03222008-07-16 21:55:45 +0100441 if (!(port->port.flags & ASYNC_INITIALIZED) ||
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800442 !(port->status & ISI_TXOK))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443 continue;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800444
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445 txcount = min_t(short, TX_SIZE, port->xmit_cnt);
Jiri Slaby5b21f9d2007-07-17 04:05:17 -0700446 if (txcount <= 0 || tty->stopped || tty->hw_stopped)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447 continue;
Jiri Slaby5b21f9d2007-07-17 04:05:17 -0700448
449 if (!(inw(base + 0x02) & (1 << port->channel)))
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800450 continue;
Jiri Slaby5b21f9d2007-07-17 04:05:17 -0700451
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800452 pr_dbg("txing %d bytes, port%d.\n", txcount,
453 port->channel + 1);
454 outw((port->channel << isi_card[card].shift_count) | txcount,
455 base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456 residue = NO;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800457 wrd = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458 while (1) {
Jiri Slabya547dfe2006-01-09 20:54:26 -0800459 cnt = min_t(int, txcount, (SERIAL_XMIT_SIZE
460 - port->xmit_tail));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461 if (residue == YES) {
462 residue = NO;
463 if (cnt > 0) {
Alan Coxf1d03222008-07-16 21:55:45 +0100464 wrd |= (port->port.xmit_buf[port->xmit_tail]
Jiri Slabya547dfe2006-01-09 20:54:26 -0800465 << 8);
466 port->xmit_tail = (port->xmit_tail + 1)
467 & (SERIAL_XMIT_SIZE - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468 port->xmit_cnt--;
469 txcount--;
470 cnt--;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800471 outw(wrd, base);
Jiri Slabya547dfe2006-01-09 20:54:26 -0800472 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473 outw(wrd, base);
474 break;
475 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800476 }
Alan Cox251b8dd2008-04-30 00:54:12 -0700477 if (cnt <= 0)
478 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479 word_count = cnt >> 1;
Alan Coxf1d03222008-07-16 21:55:45 +0100480 outsw(base, port->port.xmit_buf+port->xmit_tail, word_count);
Jiri Slabya547dfe2006-01-09 20:54:26 -0800481 port->xmit_tail = (port->xmit_tail
482 + (word_count << 1)) & (SERIAL_XMIT_SIZE - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483 txcount -= (word_count << 1);
484 port->xmit_cnt -= (word_count << 1);
485 if (cnt & 0x0001) {
486 residue = YES;
Alan Coxf1d03222008-07-16 21:55:45 +0100487 wrd = port->port.xmit_buf[port->xmit_tail];
Jiri Slabya547dfe2006-01-09 20:54:26 -0800488 port->xmit_tail = (port->xmit_tail + 1)
489 & (SERIAL_XMIT_SIZE - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490 port->xmit_cnt--;
491 txcount--;
492 }
493 }
494
495 InterruptTheCard(base);
496 if (port->xmit_cnt <= 0)
497 port->status &= ~ISI_TXOK;
498 if (port->xmit_cnt <= WAKEUP_CHARS)
Jiri Slaby0aa5de82007-02-10 01:44:47 -0800499 tty_wakeup(tty);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800500 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501
Alan Coxd450b5a2008-10-13 10:39:58 +0100502put_unlock:
503 tty_kref_put(tty);
Jiri Slaby5b21f9d2007-07-17 04:05:17 -0700504unlock:
505 spin_unlock_irqrestore(&isi_card[card].card_lock, flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800506 /* schedule another tx for hopefully in about 10ms */
507sched_again:
Jiri Slaby34b55b82006-12-08 02:38:55 -0800508 mod_timer(&tx, jiffies + msecs_to_jiffies(10));
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800509}
510
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511/*
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800512 * Main interrupt handler routine
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513 */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800514
David Howells7d12e782006-10-05 14:55:46 +0100515static irqreturn_t isicom_interrupt(int irq, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516{
Jiri Slaby8070e352006-01-09 20:54:22 -0800517 struct isi_board *card = dev_id;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800518 struct isi_port *port;
519 struct tty_struct *tty;
Jiri Slaby8070e352006-01-09 20:54:22 -0800520 unsigned long base;
521 u16 header, word_count, count, channel;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522 short byte_count;
Alan Cox33f0f882006-01-09 20:54:13 -0800523 unsigned char *rp;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800524
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525 if (!card || !(card->status & FIRMWARE_LOADED))
526 return IRQ_NONE;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800527
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528 base = card->base;
Jiri Slabycb4a10c2007-02-10 01:44:53 -0800529
530 /* did the card interrupt us? */
531 if (!(inw(base + 0x0e) & 0x02))
532 return IRQ_NONE;
533
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534 spin_lock(&card->card_lock);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800535
Jiri Slaby18234f82006-12-08 02:38:51 -0800536 /*
537 * disable any interrupts from the PCI card and lower the
538 * interrupt line
539 */
540 outw(0x8000, base+0x04);
541 ClearInterrupt(base);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800542
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543 inw(base); /* get the dummy word out */
544 header = inw(base);
545 channel = (header & 0x7800) >> card->shift_count;
546 byte_count = header & 0xff;
547
548 if (channel + 1 > card->port_count) {
Jiri Slabya547dfe2006-01-09 20:54:26 -0800549 printk(KERN_WARNING "ISICOM: isicom_interrupt(0x%lx): "
550 "%d(channel) > port_count.\n", base, channel+1);
Jiri Slaby18234f82006-12-08 02:38:51 -0800551 outw(0x0000, base+0x04); /* enable interrupts */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552 spin_unlock(&card->card_lock);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800553 return IRQ_HANDLED;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554 }
555 port = card->ports + channel;
Alan Coxf1d03222008-07-16 21:55:45 +0100556 if (!(port->port.flags & ASYNC_INITIALIZED)) {
Jiri Slaby18234f82006-12-08 02:38:51 -0800557 outw(0x0000, base+0x04); /* enable interrupts */
Jiri Slaby174f1302007-02-10 01:44:52 -0800558 spin_unlock(&card->card_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559 return IRQ_HANDLED;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800560 }
561
Alan Coxd450b5a2008-10-13 10:39:58 +0100562 tty = tty_port_tty_get(&port->port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563 if (tty == NULL) {
564 word_count = byte_count >> 1;
Alan Cox251b8dd2008-04-30 00:54:12 -0700565 while (byte_count > 1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566 inw(base);
567 byte_count -= 2;
568 }
569 if (byte_count & 0x01)
570 inw(base);
Jiri Slaby18234f82006-12-08 02:38:51 -0800571 outw(0x0000, base+0x04); /* enable interrupts */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572 spin_unlock(&card->card_lock);
573 return IRQ_HANDLED;
574 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800575
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576 if (header & 0x8000) { /* Status Packet */
577 header = inw(base);
Alan Cox251b8dd2008-04-30 00:54:12 -0700578 switch (header & 0xff) {
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800579 case 0: /* Change in EIA signals */
Alan Coxf1d03222008-07-16 21:55:45 +0100580 if (port->port.flags & ASYNC_CHECK_CD) {
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800581 if (port->status & ISI_DCD) {
582 if (!(header & ISI_DCD)) {
583 /* Carrier has been lost */
Jiri Slabya547dfe2006-01-09 20:54:26 -0800584 pr_dbg("interrupt: DCD->low.\n"
585 );
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586 port->status &= ~ISI_DCD;
Jiri Slaby0aa5de82007-02-10 01:44:47 -0800587 tty_hangup(tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588 }
Jiri Slabya547dfe2006-01-09 20:54:26 -0800589 } else if (header & ISI_DCD) {
590 /* Carrier has been detected */
591 pr_dbg("interrupt: DCD->high.\n");
592 port->status |= ISI_DCD;
Alan Coxf1d03222008-07-16 21:55:45 +0100593 wake_up_interruptible(&port->port.open_wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594 }
Jiri Slabya547dfe2006-01-09 20:54:26 -0800595 } else {
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800596 if (header & ISI_DCD)
597 port->status |= ISI_DCD;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598 else
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800599 port->status &= ~ISI_DCD;
600 }
601
Alan Coxf1d03222008-07-16 21:55:45 +0100602 if (port->port.flags & ASYNC_CTS_FLOW) {
Alan Coxd450b5a2008-10-13 10:39:58 +0100603 if (tty->hw_stopped) {
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800604 if (header & ISI_CTS) {
Alan Coxf1d03222008-07-16 21:55:45 +0100605 port->port.tty->hw_stopped = 0;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800606 /* start tx ing */
Jiri Slabya547dfe2006-01-09 20:54:26 -0800607 port->status |= (ISI_TXOK
608 | ISI_CTS);
Jiri Slaby0aa5de82007-02-10 01:44:47 -0800609 tty_wakeup(tty);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800610 }
Jiri Slabya547dfe2006-01-09 20:54:26 -0800611 } else if (!(header & ISI_CTS)) {
Alan Coxd450b5a2008-10-13 10:39:58 +0100612 tty->hw_stopped = 1;
Jiri Slabya547dfe2006-01-09 20:54:26 -0800613 /* stop tx ing */
614 port->status &= ~(ISI_TXOK | ISI_CTS);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800615 }
Jiri Slabya547dfe2006-01-09 20:54:26 -0800616 } else {
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800617 if (header & ISI_CTS)
618 port->status |= ISI_CTS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619 else
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800620 port->status &= ~ISI_CTS;
621 }
622
623 if (header & ISI_DSR)
624 port->status |= ISI_DSR;
625 else
626 port->status &= ~ISI_DSR;
627
628 if (header & ISI_RI)
629 port->status |= ISI_RI;
630 else
631 port->status &= ~ISI_RI;
632
633 break;
634
Jiri Slabya547dfe2006-01-09 20:54:26 -0800635 case 1: /* Received Break !!! */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800636 tty_insert_flip_char(tty, 0, TTY_BREAK);
Alan Coxf1d03222008-07-16 21:55:45 +0100637 if (port->port.flags & ASYNC_SAK)
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800638 do_SAK(tty);
639 tty_flip_buffer_push(tty);
640 break;
641
642 case 2: /* Statistics */
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800643 pr_dbg("isicom_interrupt: stats!!!.\n");
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800644 break;
645
646 default:
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800647 pr_dbg("Intr: Unknown code in status packet.\n");
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800648 break;
649 }
Jiri Slabya547dfe2006-01-09 20:54:26 -0800650 } else { /* Data Packet */
Alan Cox33f0f882006-01-09 20:54:13 -0800651
652 count = tty_prepare_flip_string(tty, &rp, byte_count & ~1);
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800653 pr_dbg("Intr: Can rx %d of %d bytes.\n", count, byte_count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654 word_count = count >> 1;
Alan Cox33f0f882006-01-09 20:54:13 -0800655 insw(base, rp, word_count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656 byte_count -= (word_count << 1);
657 if (count & 0x0001) {
Jiri Slabya547dfe2006-01-09 20:54:26 -0800658 tty_insert_flip_char(tty, inw(base) & 0xff,
659 TTY_NORMAL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660 byte_count -= 2;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800661 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662 if (byte_count > 0) {
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800663 pr_dbg("Intr(0x%lx:%d): Flip buffer overflow! dropping "
664 "bytes...\n", base, channel + 1);
Alan Cox251b8dd2008-04-30 00:54:12 -0700665 /* drain out unread xtra data */
666 while (byte_count > 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667 inw(base);
668 byte_count -= 2;
669 }
670 }
Alan Cox33f0f882006-01-09 20:54:13 -0800671 tty_flip_buffer_push(tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700672 }
Jiri Slaby18234f82006-12-08 02:38:51 -0800673 outw(0x0000, base+0x04); /* enable interrupts */
Jiri Slaby174f1302007-02-10 01:44:52 -0800674 spin_unlock(&card->card_lock);
Alan Coxd450b5a2008-10-13 10:39:58 +0100675 tty_kref_put(tty);
Jiri Slabya547dfe2006-01-09 20:54:26 -0800676
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677 return IRQ_HANDLED;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800678}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700679
Alan Coxd450b5a2008-10-13 10:39:58 +0100680static void isicom_config_port(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681{
Alan Coxd450b5a2008-10-13 10:39:58 +0100682 struct isi_port *port = tty->driver_data;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800683 struct isi_board *card = port->card;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684 unsigned long baud;
Jiri Slaby8070e352006-01-09 20:54:22 -0800685 unsigned long base = card->base;
686 u16 channel_setup, channel = port->channel,
687 shift_count = card->shift_count;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688 unsigned char flow_ctrl;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800689
Alan Cox251b8dd2008-04-30 00:54:12 -0700690 /* FIXME: Switch to new tty baud API */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691 baud = C_BAUD(tty);
692 if (baud & CBAUDEX) {
693 baud &= ~CBAUDEX;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800694
Linus Torvalds1da177e2005-04-16 15:20:36 -0700695 /* if CBAUDEX bit is on and the baud is set to either 50 or 75
696 * then the card is programmed for 57.6Kbps or 115Kbps
697 * respectively.
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800698 */
699
Jiri Slaby7edc1362007-02-10 01:44:54 -0800700 /* 1,2,3,4 => 57.6, 115.2, 230, 460 kbps resp. */
701 if (baud < 1 || baud > 4)
Alan Coxd450b5a2008-10-13 10:39:58 +0100702 tty->termios->c_cflag &= ~CBAUDEX;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700703 else
704 baud += 15;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800705 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706 if (baud == 15) {
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800707
708 /* the ASYNC_SPD_HI and ASYNC_SPD_VHI options are set
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709 * by the set_serial_info ioctl ... this is done by
710 * the 'setserial' utility.
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800711 */
712
Alan Coxf1d03222008-07-16 21:55:45 +0100713 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800714 baud++; /* 57.6 Kbps */
Alan Coxf1d03222008-07-16 21:55:45 +0100715 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
Alan Cox251b8dd2008-04-30 00:54:12 -0700716 baud += 2; /* 115 Kbps */
Alan Coxf1d03222008-07-16 21:55:45 +0100717 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
Jiri Slaby7edc1362007-02-10 01:44:54 -0800718 baud += 3; /* 230 kbps*/
Alan Coxf1d03222008-07-16 21:55:45 +0100719 if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
Jiri Slaby7edc1362007-02-10 01:44:54 -0800720 baud += 4; /* 460 kbps*/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721 }
722 if (linuxb_to_isib[baud] == -1) {
723 /* hang up */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800724 drop_dtr(port);
725 return;
Alan Cox251b8dd2008-04-30 00:54:12 -0700726 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727 raise_dtr(port);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800728
Jiri Slabycfe7c09a2006-12-29 16:48:00 -0800729 if (WaitTillCardIsFree(base) == 0) {
Alan Cox251b8dd2008-04-30 00:54:12 -0700730 outw(0x8000 | (channel << shift_count) | 0x03, base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731 outw(linuxb_to_isib[baud] << 8 | 0x03, base);
732 channel_setup = 0;
Alan Cox251b8dd2008-04-30 00:54:12 -0700733 switch (C_CSIZE(tty)) {
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800734 case CS5:
735 channel_setup |= ISICOM_CS5;
736 break;
737 case CS6:
738 channel_setup |= ISICOM_CS6;
739 break;
740 case CS7:
741 channel_setup |= ISICOM_CS7;
742 break;
743 case CS8:
744 channel_setup |= ISICOM_CS8;
745 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700746 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800747
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748 if (C_CSTOPB(tty))
749 channel_setup |= ISICOM_2SB;
750 if (C_PARENB(tty)) {
751 channel_setup |= ISICOM_EVPAR;
752 if (C_PARODD(tty))
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800753 channel_setup |= ISICOM_ODPAR;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800755 outw(channel_setup, base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756 InterruptTheCard(base);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800757 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700758 if (C_CLOCAL(tty))
Alan Coxf1d03222008-07-16 21:55:45 +0100759 port->port.flags &= ~ASYNC_CHECK_CD;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760 else
Alan Coxf1d03222008-07-16 21:55:45 +0100761 port->port.flags |= ASYNC_CHECK_CD;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800762
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763 /* flow control settings ...*/
764 flow_ctrl = 0;
Alan Coxf1d03222008-07-16 21:55:45 +0100765 port->port.flags &= ~ASYNC_CTS_FLOW;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766 if (C_CRTSCTS(tty)) {
Alan Coxf1d03222008-07-16 21:55:45 +0100767 port->port.flags |= ASYNC_CTS_FLOW;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768 flow_ctrl |= ISICOM_CTSRTS;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800769 }
770 if (I_IXON(tty))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771 flow_ctrl |= ISICOM_RESPOND_XONXOFF;
772 if (I_IXOFF(tty))
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800773 flow_ctrl |= ISICOM_INITIATE_XONXOFF;
774
Jiri Slabycfe7c09a2006-12-29 16:48:00 -0800775 if (WaitTillCardIsFree(base) == 0) {
Alan Cox251b8dd2008-04-30 00:54:12 -0700776 outw(0x8000 | (channel << shift_count) | 0x04, base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777 outw(flow_ctrl << 8 | 0x05, base);
778 outw((STOP_CHAR(tty)) << 8 | (START_CHAR(tty)), base);
779 InterruptTheCard(base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700780 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800781
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782 /* rx enabled -> enable port for rx on the card */
783 if (C_CREAD(tty)) {
784 card->port_status |= (1 << channel);
785 outw(card->port_status, base + 0x02);
786 }
787}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800789/* open et all */
790
791static inline void isicom_setup_board(struct isi_board *bp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700792{
793 int channel;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800794 struct isi_port *port;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700795 unsigned long flags;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800796
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797 spin_lock_irqsave(&bp->card_lock, flags);
798 if (bp->status & BOARD_ACTIVE) {
799 spin_unlock_irqrestore(&bp->card_lock, flags);
800 return;
801 }
802 port = bp->ports;
803 bp->status |= BOARD_ACTIVE;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800804 for (channel = 0; channel < bp->port_count; channel++, port++)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805 drop_dtr_rts(port);
Jiri Slabycfe7c09a2006-12-29 16:48:00 -0800806 spin_unlock_irqrestore(&bp->card_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807}
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800808
Alan Coxd450b5a2008-10-13 10:39:58 +0100809static int isicom_setup_port(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810{
Alan Coxd450b5a2008-10-13 10:39:58 +0100811 struct isi_port *port = tty->driver_data;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800812 struct isi_board *card = port->card;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700813 unsigned long flags;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800814
Alan Coxf1d03222008-07-16 21:55:45 +0100815 if (port->port.flags & ASYNC_INITIALIZED)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816 return 0;
Alan Coxf1d03222008-07-16 21:55:45 +0100817 if (tty_port_alloc_xmit_buf(&port->port) < 0)
818 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700819
820 spin_lock_irqsave(&card->card_lock, flags);
Alan Coxd450b5a2008-10-13 10:39:58 +0100821 clear_bit(TTY_IO_ERROR, &tty->flags);
Alan Coxf1d03222008-07-16 21:55:45 +0100822 if (port->port.count == 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823 card->count++;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800824
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800826
Linus Torvalds1da177e2005-04-16 15:20:36 -0700827 /* discard any residual data */
Jiri Slabycfe7c09a2006-12-29 16:48:00 -0800828 if (WaitTillCardIsFree(card->base) == 0) {
829 outw(0x8000 | (port->channel << card->shift_count) | 0x02,
830 card->base);
831 outw(((ISICOM_KILLTX | ISICOM_KILLRX) << 8) | 0x06, card->base);
832 InterruptTheCard(card->base);
833 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800834
Alan Coxd450b5a2008-10-13 10:39:58 +0100835 isicom_config_port(tty);
Alan Coxf1d03222008-07-16 21:55:45 +0100836 port->port.flags |= ASYNC_INITIALIZED;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700837 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800838
839 return 0;
840}
841
Alan Cox31f35932009-01-02 13:45:05 +0000842static int isicom_carrier_raised(struct tty_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843{
Alan Cox31f35932009-01-02 13:45:05 +0000844 struct isi_port *ip = container_of(port, struct isi_port, port);
845 return (ip->status & ISI_DCD)?1 : 0;
846}
847
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800848static int isicom_open(struct tty_struct *tty, struct file *filp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849{
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800850 struct isi_port *port;
851 struct isi_board *card;
Jiri Slaby17c4edf2006-12-08 02:38:57 -0800852 unsigned int board;
853 int error, line;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700854
855 line = tty->index;
856 if (line < 0 || line > PORT_COUNT-1)
857 return -ENODEV;
858 board = BOARD(line);
859 card = &isi_card[board];
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800860
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861 if (!(card->status & FIRMWARE_LOADED))
862 return -ENODEV;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800863
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864 /* open on a port greater than the port count for the card !!! */
865 if (line > ((board * 16) + card->port_count - 1))
866 return -ENODEV;
867
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800868 port = &isi_ports[line];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700869 if (isicom_paranoia_check(port, tty->name, "isicom_open"))
870 return -ENODEV;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800871
872 isicom_setup_board(card);
873
Alan Cox36c621d2009-01-02 13:46:10 +0000874 /* FIXME: locking on port.count etc */
Alan Coxf1d03222008-07-16 21:55:45 +0100875 port->port.count++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700876 tty->driver_data = port;
Alan Coxd450b5a2008-10-13 10:39:58 +0100877 tty_port_tty_set(&port->port, tty);
878 error = isicom_setup_port(tty);
Alan Cox251b8dd2008-04-30 00:54:12 -0700879 if (error == 0)
Alan Cox36c621d2009-01-02 13:46:10 +0000880 error = tty_port_block_til_ready(&port->port, tty, filp);
Alan Cox251b8dd2008-04-30 00:54:12 -0700881 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700882}
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800883
Linus Torvalds1da177e2005-04-16 15:20:36 -0700884/* close et all */
885
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800886static inline void isicom_shutdown_board(struct isi_board *bp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700887{
Alan Cox251b8dd2008-04-30 00:54:12 -0700888 if (bp->status & BOARD_ACTIVE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700889 bp->status &= ~BOARD_ACTIVE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700890}
891
Jiri Slabycfe7c09a2006-12-29 16:48:00 -0800892/* card->lock HAS to be held */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800893static void isicom_shutdown_port(struct isi_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894{
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800895 struct isi_board *card = port->card;
896 struct tty_struct *tty;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800897
Alan Coxd450b5a2008-10-13 10:39:58 +0100898 tty = tty_port_tty_get(&port->port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700899
Alan Coxd450b5a2008-10-13 10:39:58 +0100900 if (!(port->port.flags & ASYNC_INITIALIZED)) {
901 tty_kref_put(tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700902 return;
Alan Coxd450b5a2008-10-13 10:39:58 +0100903 }
Jiri Slabycfe7c09a2006-12-29 16:48:00 -0800904
Alan Coxf1d03222008-07-16 21:55:45 +0100905 tty_port_free_xmit_buf(&port->port);
906 port->port.flags &= ~ASYNC_INITIALIZED;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700907 /* 3rd October 2000 : Vinayak P Risbud */
Alan Coxd450b5a2008-10-13 10:39:58 +0100908 tty_port_tty_set(&port->port, NULL);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800909
Linus Torvalds1da177e2005-04-16 15:20:36 -0700910 /*Fix done by Anil .S on 30-04-2001
911 remote login through isi port has dtr toggle problem
912 due to which the carrier drops before the password prompt
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800913 appears on the remote end. Now we drop the dtr only if the
Linus Torvalds1da177e2005-04-16 15:20:36 -0700914 HUPCL(Hangup on close) flag is set for the tty*/
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800915
916 if (C_HUPCL(tty))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917 /* drop dtr on this port */
918 drop_dtr(port);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800919
920 /* any other port uninits */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700921 if (tty)
922 set_bit(TTY_IO_ERROR, &tty->flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800923
Linus Torvalds1da177e2005-04-16 15:20:36 -0700924 if (--card->count < 0) {
Jiri Slabyaaa246e2006-01-09 20:54:23 -0800925 pr_dbg("isicom_shutdown_port: bad board(0x%lx) count %d.\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700926 card->base, card->count);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800927 card->count = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800929
Jiri Slabya547dfe2006-01-09 20:54:26 -0800930 /* last port was closed, shutdown that boad too */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800931 if (C_HUPCL(tty)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700932 if (!card->count)
933 isicom_shutdown_board(card);
934 }
Alan Coxbbb8e6b2009-04-06 17:33:55 +0100935 tty_kref_put(tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700936}
937
Alan Cox978e5952008-04-30 00:53:59 -0700938static void isicom_flush_buffer(struct tty_struct *tty)
939{
940 struct isi_port *port = tty->driver_data;
941 struct isi_board *card = port->card;
942 unsigned long flags;
943
944 if (isicom_paranoia_check(port, tty->name, "isicom_flush_buffer"))
945 return;
946
947 spin_lock_irqsave(&card->card_lock, flags);
948 port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
949 spin_unlock_irqrestore(&card->card_lock, flags);
950
951 tty_wakeup(tty);
952}
953
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800954static void isicom_close(struct tty_struct *tty, struct file *filp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955{
Alan Coxa6614992009-01-02 13:46:50 +0000956 struct isi_port *ip = tty->driver_data;
957 struct tty_port *port = &ip->port;
Jiri Slabyc387fd82006-11-15 00:30:17 +0100958 struct isi_board *card;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700959 unsigned long flags;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800960
Alan Coxa6614992009-01-02 13:46:50 +0000961 BUG_ON(!ip);
962
963 card = ip->card;
964 if (isicom_paranoia_check(ip, tty->name, "isicom_close"))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700965 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800966
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800967 /* indicate to the card that no more data can be received
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968 on this port */
969 spin_lock_irqsave(&card->card_lock, flags);
Alan Coxa6614992009-01-02 13:46:50 +0000970 if (port->flags & ASYNC_INITIALIZED) {
971 card->port_status &= ~(1 << ip->channel);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700972 outw(card->port_status, card->base + 0x02);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800973 }
Alan Coxa6614992009-01-02 13:46:50 +0000974 isicom_shutdown_port(ip);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700975 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800976
Alan Cox978e5952008-04-30 00:53:59 -0700977 isicom_flush_buffer(tty);
Alan Coxa6614992009-01-02 13:46:50 +0000978
979 tty_port_close_end(port, tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700980}
981
982/* write et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800983static int isicom_write(struct tty_struct *tty, const unsigned char *buf,
984 int count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700985{
Jiri Slaby8070e352006-01-09 20:54:22 -0800986 struct isi_port *port = tty->driver_data;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800987 struct isi_board *card = port->card;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700988 unsigned long flags;
989 int cnt, total = 0;
990
991 if (isicom_paranoia_check(port, tty->name, "isicom_write"))
992 return 0;
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800993
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994 spin_lock_irqsave(&card->card_lock, flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800995
Alan Cox251b8dd2008-04-30 00:54:12 -0700996 while (1) {
Jiri Slabya547dfe2006-01-09 20:54:26 -0800997 cnt = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt
998 - 1, SERIAL_XMIT_SIZE - port->xmit_head));
Jiri Slabyd8d16e42006-01-09 20:54:21 -0800999 if (cnt <= 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001000 break;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001001
Alan Coxf1d03222008-07-16 21:55:45 +01001002 memcpy(port->port.xmit_buf + port->xmit_head, buf, cnt);
Jiri Slabya547dfe2006-01-09 20:54:26 -08001003 port->xmit_head = (port->xmit_head + cnt) & (SERIAL_XMIT_SIZE
1004 - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001005 port->xmit_cnt += cnt;
1006 buf += cnt;
1007 count -= cnt;
1008 total += cnt;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001009 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001010 if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped)
1011 port->status |= ISI_TXOK;
1012 spin_unlock_irqrestore(&card->card_lock, flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001013 return total;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001014}
1015
1016/* put_char et all */
Alan Coxf34d7a52008-04-30 00:54:13 -07001017static int isicom_put_char(struct tty_struct *tty, unsigned char ch)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001018{
Jiri Slaby8070e352006-01-09 20:54:22 -08001019 struct isi_port *port = tty->driver_data;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001020 struct isi_board *card = port->card;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001021 unsigned long flags;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001022
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023 if (isicom_paranoia_check(port, tty->name, "isicom_put_char"))
Alan Coxf34d7a52008-04-30 00:54:13 -07001024 return 0;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001025
Linus Torvalds1da177e2005-04-16 15:20:36 -07001026 spin_lock_irqsave(&card->card_lock, flags);
Alan Coxf34d7a52008-04-30 00:54:13 -07001027 if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
1028 spin_unlock_irqrestore(&card->card_lock, flags);
1029 return 0;
1030 }
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001031
Alan Coxf1d03222008-07-16 21:55:45 +01001032 port->port.xmit_buf[port->xmit_head++] = ch;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033 port->xmit_head &= (SERIAL_XMIT_SIZE - 1);
1034 port->xmit_cnt++;
1035 spin_unlock_irqrestore(&card->card_lock, flags);
Alan Coxf34d7a52008-04-30 00:54:13 -07001036 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001037}
1038
1039/* flush_chars et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001040static void isicom_flush_chars(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001041{
Jiri Slaby8070e352006-01-09 20:54:22 -08001042 struct isi_port *port = tty->driver_data;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001043
Linus Torvalds1da177e2005-04-16 15:20:36 -07001044 if (isicom_paranoia_check(port, tty->name, "isicom_flush_chars"))
1045 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001046
Jiri Slabya547dfe2006-01-09 20:54:26 -08001047 if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
Alan Coxf1d03222008-07-16 21:55:45 +01001048 !port->port.xmit_buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001049 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001050
Linus Torvalds1da177e2005-04-16 15:20:36 -07001051 /* this tells the transmitter to consider this port for
1052 data output to the card ... that's the best we can do. */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001053 port->status |= ISI_TXOK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001054}
1055
1056/* write_room et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001057static int isicom_write_room(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001058{
Jiri Slaby8070e352006-01-09 20:54:22 -08001059 struct isi_port *port = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001060 int free;
1061
1062 if (isicom_paranoia_check(port, tty->name, "isicom_write_room"))
1063 return 0;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001064
Linus Torvalds1da177e2005-04-16 15:20:36 -07001065 free = SERIAL_XMIT_SIZE - port->xmit_cnt - 1;
1066 if (free < 0)
1067 free = 0;
1068 return free;
1069}
1070
1071/* chars_in_buffer et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001072static int isicom_chars_in_buffer(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001073{
Jiri Slaby8070e352006-01-09 20:54:22 -08001074 struct isi_port *port = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001075 if (isicom_paranoia_check(port, tty->name, "isicom_chars_in_buffer"))
1076 return 0;
1077 return port->xmit_cnt;
1078}
1079
1080/* ioctl et all */
Alan Cox6d889722008-07-22 11:18:21 +01001081static int isicom_send_break(struct tty_struct *tty, int length)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001082{
Alan Cox6d889722008-07-22 11:18:21 +01001083 struct isi_port *port = tty->driver_data;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001084 struct isi_board *card = port->card;
Jiri Slaby8070e352006-01-09 20:54:22 -08001085 unsigned long base = card->base;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001086
Alan Cox6d889722008-07-22 11:18:21 +01001087 if (length == -1)
1088 return -EOPNOTSUPP;
1089
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001090 if (!lock_card(card))
Alan Cox6d889722008-07-22 11:18:21 +01001091 return -EINVAL;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001092
Linus Torvalds1da177e2005-04-16 15:20:36 -07001093 outw(0x8000 | ((port->channel) << (card->shift_count)) | 0x3, base);
1094 outw((length & 0xff) << 8 | 0x00, base);
1095 outw((length & 0xff00), base);
1096 InterruptTheCard(base);
1097
1098 unlock_card(card);
Alan Cox6d889722008-07-22 11:18:21 +01001099 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100}
1101
1102static int isicom_tiocmget(struct tty_struct *tty, struct file *file)
1103{
Jiri Slaby8070e352006-01-09 20:54:22 -08001104 struct isi_port *port = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001105 /* just send the port status */
Jiri Slaby8070e352006-01-09 20:54:22 -08001106 u16 status = port->status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001107
1108 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1109 return -ENODEV;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001110
Linus Torvalds1da177e2005-04-16 15:20:36 -07001111 return ((status & ISI_RTS) ? TIOCM_RTS : 0) |
1112 ((status & ISI_DTR) ? TIOCM_DTR : 0) |
1113 ((status & ISI_DCD) ? TIOCM_CAR : 0) |
1114 ((status & ISI_DSR) ? TIOCM_DSR : 0) |
1115 ((status & ISI_CTS) ? TIOCM_CTS : 0) |
1116 ((status & ISI_RI ) ? TIOCM_RI : 0);
1117}
1118
1119static int isicom_tiocmset(struct tty_struct *tty, struct file *file,
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001120 unsigned int set, unsigned int clear)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001121{
Jiri Slaby8070e352006-01-09 20:54:22 -08001122 struct isi_port *port = tty->driver_data;
Jiri Slabycfe7c09a2006-12-29 16:48:00 -08001123 unsigned long flags;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001124
Linus Torvalds1da177e2005-04-16 15:20:36 -07001125 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1126 return -ENODEV;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001127
Jiri Slabycfe7c09a2006-12-29 16:48:00 -08001128 spin_lock_irqsave(&port->card->card_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001129 if (set & TIOCM_RTS)
1130 raise_rts(port);
1131 if (set & TIOCM_DTR)
1132 raise_dtr(port);
1133
1134 if (clear & TIOCM_RTS)
1135 drop_rts(port);
1136 if (clear & TIOCM_DTR)
1137 drop_dtr(port);
Jiri Slabycfe7c09a2006-12-29 16:48:00 -08001138 spin_unlock_irqrestore(&port->card->card_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139
1140 return 0;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001141}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001142
Alan Coxd450b5a2008-10-13 10:39:58 +01001143static int isicom_set_serial_info(struct tty_struct *tty,
1144 struct serial_struct __user *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001145{
Alan Coxd450b5a2008-10-13 10:39:58 +01001146 struct isi_port *port = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001147 struct serial_struct newinfo;
1148 int reconfig_port;
1149
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001150 if (copy_from_user(&newinfo, info, sizeof(newinfo)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001151 return -EFAULT;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001152
Alan Cox1eac4942008-04-30 00:53:19 -07001153 lock_kernel();
1154
Alan Coxf1d03222008-07-16 21:55:45 +01001155 reconfig_port = ((port->port.flags & ASYNC_SPD_MASK) !=
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001156 (newinfo.flags & ASYNC_SPD_MASK));
1157
Linus Torvalds1da177e2005-04-16 15:20:36 -07001158 if (!capable(CAP_SYS_ADMIN)) {
Alan Cox44b7d1b2008-07-16 21:57:18 +01001159 if ((newinfo.close_delay != port->port.close_delay) ||
1160 (newinfo.closing_wait != port->port.closing_wait) ||
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001161 ((newinfo.flags & ~ASYNC_USR_MASK) !=
Alan Coxf1d03222008-07-16 21:55:45 +01001162 (port->port.flags & ~ASYNC_USR_MASK))) {
Alan Cox1eac4942008-04-30 00:53:19 -07001163 unlock_kernel();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001164 return -EPERM;
Alan Cox1eac4942008-04-30 00:53:19 -07001165 }
Alan Coxf1d03222008-07-16 21:55:45 +01001166 port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) |
Linus Torvalds1da177e2005-04-16 15:20:36 -07001167 (newinfo.flags & ASYNC_USR_MASK));
Alan Cox251b8dd2008-04-30 00:54:12 -07001168 } else {
Alan Cox44b7d1b2008-07-16 21:57:18 +01001169 port->port.close_delay = newinfo.close_delay;
1170 port->port.closing_wait = newinfo.closing_wait;
Alan Coxf1d03222008-07-16 21:55:45 +01001171 port->port.flags = ((port->port.flags & ~ASYNC_FLAGS) |
Linus Torvalds1da177e2005-04-16 15:20:36 -07001172 (newinfo.flags & ASYNC_FLAGS));
1173 }
1174 if (reconfig_port) {
Jiri Slabycfe7c09a2006-12-29 16:48:00 -08001175 unsigned long flags;
1176 spin_lock_irqsave(&port->card->card_lock, flags);
Alan Coxd450b5a2008-10-13 10:39:58 +01001177 isicom_config_port(tty);
Jiri Slabycfe7c09a2006-12-29 16:48:00 -08001178 spin_unlock_irqrestore(&port->card->card_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001179 }
Alan Cox1eac4942008-04-30 00:53:19 -07001180 unlock_kernel();
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001181 return 0;
1182}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001183
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001184static int isicom_get_serial_info(struct isi_port *port,
1185 struct serial_struct __user *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001186{
1187 struct serial_struct out_info;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001188
Alan Cox1eac4942008-04-30 00:53:19 -07001189 lock_kernel();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001190 memset(&out_info, 0, sizeof(out_info));
1191/* out_info.type = ? */
1192 out_info.line = port - isi_ports;
1193 out_info.port = port->card->base;
1194 out_info.irq = port->card->irq;
Alan Coxf1d03222008-07-16 21:55:45 +01001195 out_info.flags = port->port.flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001196/* out_info.baud_base = ? */
Alan Cox44b7d1b2008-07-16 21:57:18 +01001197 out_info.close_delay = port->port.close_delay;
1198 out_info.closing_wait = port->port.closing_wait;
Alan Cox1eac4942008-04-30 00:53:19 -07001199 unlock_kernel();
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001200 if (copy_to_user(info, &out_info, sizeof(out_info)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001201 return -EFAULT;
1202 return 0;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001203}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001204
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001205static int isicom_ioctl(struct tty_struct *tty, struct file *filp,
1206 unsigned int cmd, unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207{
Jiri Slaby8070e352006-01-09 20:54:22 -08001208 struct isi_port *port = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001209 void __user *argp = (void __user *)arg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001210
1211 if (isicom_paranoia_check(port, tty->name, "isicom_ioctl"))
1212 return -ENODEV;
1213
Alan Cox251b8dd2008-04-30 00:54:12 -07001214 switch (cmd) {
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001215 case TIOCGSERIAL:
1216 return isicom_get_serial_info(port, argp);
1217
1218 case TIOCSSERIAL:
Alan Coxd450b5a2008-10-13 10:39:58 +01001219 return isicom_set_serial_info(tty, argp);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001220
1221 default:
1222 return -ENOIOCTLCMD;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001223 }
1224 return 0;
1225}
1226
1227/* set_termios et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001228static void isicom_set_termios(struct tty_struct *tty,
Alan Cox606d0992006-12-08 02:38:45 -08001229 struct ktermios *old_termios)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001230{
Jiri Slaby8070e352006-01-09 20:54:22 -08001231 struct isi_port *port = tty->driver_data;
Jiri Slabycfe7c09a2006-12-29 16:48:00 -08001232 unsigned long flags;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001233
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234 if (isicom_paranoia_check(port, tty->name, "isicom_set_termios"))
1235 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001236
Linus Torvalds1da177e2005-04-16 15:20:36 -07001237 if (tty->termios->c_cflag == old_termios->c_cflag &&
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001238 tty->termios->c_iflag == old_termios->c_iflag)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001239 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001240
Jiri Slabycfe7c09a2006-12-29 16:48:00 -08001241 spin_lock_irqsave(&port->card->card_lock, flags);
Alan Coxd450b5a2008-10-13 10:39:58 +01001242 isicom_config_port(tty);
Jiri Slabycfe7c09a2006-12-29 16:48:00 -08001243 spin_unlock_irqrestore(&port->card->card_lock, flags);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001244
Linus Torvalds1da177e2005-04-16 15:20:36 -07001245 if ((old_termios->c_cflag & CRTSCTS) &&
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001246 !(tty->termios->c_cflag & CRTSCTS)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001247 tty->hw_stopped = 0;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001248 isicom_start(tty);
1249 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001250}
1251
1252/* throttle et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001253static void isicom_throttle(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254{
Jiri Slaby8070e352006-01-09 20:54:22 -08001255 struct isi_port *port = tty->driver_data;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001256 struct isi_board *card = port->card;
1257
Linus Torvalds1da177e2005-04-16 15:20:36 -07001258 if (isicom_paranoia_check(port, tty->name, "isicom_throttle"))
1259 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001260
Linus Torvalds1da177e2005-04-16 15:20:36 -07001261 /* tell the card that this port cannot handle any more data for now */
1262 card->port_status &= ~(1 << port->channel);
1263 outw(card->port_status, card->base + 0x02);
1264}
1265
1266/* unthrottle et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001267static void isicom_unthrottle(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001268{
Jiri Slaby8070e352006-01-09 20:54:22 -08001269 struct isi_port *port = tty->driver_data;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001270 struct isi_board *card = port->card;
1271
Linus Torvalds1da177e2005-04-16 15:20:36 -07001272 if (isicom_paranoia_check(port, tty->name, "isicom_unthrottle"))
1273 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001274
Linus Torvalds1da177e2005-04-16 15:20:36 -07001275 /* tell the card that this port is ready to accept more data */
1276 card->port_status |= (1 << port->channel);
1277 outw(card->port_status, card->base + 0x02);
1278}
1279
1280/* stop et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001281static void isicom_stop(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001282{
Jiri Slaby8070e352006-01-09 20:54:22 -08001283 struct isi_port *port = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001284
1285 if (isicom_paranoia_check(port, tty->name, "isicom_stop"))
1286 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001287
Linus Torvalds1da177e2005-04-16 15:20:36 -07001288 /* this tells the transmitter not to consider this port for
1289 data output to the card. */
1290 port->status &= ~ISI_TXOK;
1291}
1292
1293/* start et all */
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001294static void isicom_start(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001295{
Jiri Slaby8070e352006-01-09 20:54:22 -08001296 struct isi_port *port = tty->driver_data;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001297
Linus Torvalds1da177e2005-04-16 15:20:36 -07001298 if (isicom_paranoia_check(port, tty->name, "isicom_start"))
1299 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001300
Linus Torvalds1da177e2005-04-16 15:20:36 -07001301 /* this tells the transmitter to consider this port for
1302 data output to the card. */
1303 port->status |= ISI_TXOK;
1304}
1305
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001306static void isicom_hangup(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001307{
Jiri Slaby8070e352006-01-09 20:54:22 -08001308 struct isi_port *port = tty->driver_data;
Jiri Slabycfe7c09a2006-12-29 16:48:00 -08001309 unsigned long flags;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001310
Linus Torvalds1da177e2005-04-16 15:20:36 -07001311 if (isicom_paranoia_check(port, tty->name, "isicom_hangup"))
1312 return;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001313
Jiri Slabycfe7c09a2006-12-29 16:48:00 -08001314 spin_lock_irqsave(&port->card->card_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001315 isicom_shutdown_port(port);
Jiri Slabycfe7c09a2006-12-29 16:48:00 -08001316 spin_unlock_irqrestore(&port->card->card_lock, flags);
1317
Alan Cox3e616962009-01-02 13:45:26 +00001318 tty_port_hangup(&port->port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001319}
1320
Linus Torvalds1da177e2005-04-16 15:20:36 -07001321
Jiri Slaby9ac09482006-01-09 20:54:24 -08001322/*
1323 * Driver init and deinit functions
1324 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001325
Jeff Dikeb68e31d2006-10-02 02:17:18 -07001326static const struct tty_operations isicom_ops = {
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001327 .open = isicom_open,
1328 .close = isicom_close,
1329 .write = isicom_write,
1330 .put_char = isicom_put_char,
1331 .flush_chars = isicom_flush_chars,
1332 .write_room = isicom_write_room,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001333 .chars_in_buffer = isicom_chars_in_buffer,
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001334 .ioctl = isicom_ioctl,
1335 .set_termios = isicom_set_termios,
1336 .throttle = isicom_throttle,
1337 .unthrottle = isicom_unthrottle,
1338 .stop = isicom_stop,
1339 .start = isicom_start,
1340 .hangup = isicom_hangup,
1341 .flush_buffer = isicom_flush_buffer,
1342 .tiocmget = isicom_tiocmget,
1343 .tiocmset = isicom_tiocmset,
Alan Cox6d889722008-07-22 11:18:21 +01001344 .break_ctl = isicom_send_break,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001345};
1346
Alan Cox31f35932009-01-02 13:45:05 +00001347static const struct tty_port_operations isicom_port_ops = {
1348 .carrier_raised = isicom_carrier_raised,
Alan Coxfcc8ac12009-06-11 12:24:17 +01001349 .dtr_rts = isicom_dtr_rts,
Alan Cox31f35932009-01-02 13:45:05 +00001350};
1351
Jiri Slaby9ac09482006-01-09 20:54:24 -08001352static int __devinit reset_card(struct pci_dev *pdev,
1353 const unsigned int card, unsigned int *signature)
1354{
1355 struct isi_board *board = pci_get_drvdata(pdev);
1356 unsigned long base = board->base;
Jiri Slabyf0a0ba62007-02-10 01:44:52 -08001357 unsigned int sig, portcount = 0;
Jiri Slaby9ac09482006-01-09 20:54:24 -08001358 int retval = 0;
1359
1360 dev_dbg(&pdev->dev, "ISILoad:Resetting Card%d at 0x%lx\n", card + 1,
1361 base);
1362
1363 inw(base + 0x8);
1364
Jiri Slabyf0a0ba62007-02-10 01:44:52 -08001365 msleep(10);
Jiri Slaby9ac09482006-01-09 20:54:24 -08001366
1367 outw(0, base + 0x8); /* Reset */
1368
Jiri Slabyf0a0ba62007-02-10 01:44:52 -08001369 msleep(1000);
Jiri Slaby9ac09482006-01-09 20:54:24 -08001370
Jiri Slabyf0a0ba62007-02-10 01:44:52 -08001371 sig = inw(base + 0x4) & 0xff;
Jiri Slaby9ac09482006-01-09 20:54:24 -08001372
Jiri Slabyf0a0ba62007-02-10 01:44:52 -08001373 if (sig != 0xa5 && sig != 0xbb && sig != 0xcc && sig != 0xdd &&
1374 sig != 0xee) {
1375 dev_warn(&pdev->dev, "ISILoad:Card%u reset failure (Possible "
1376 "bad I/O Port Address 0x%lx).\n", card + 1, base);
1377 dev_dbg(&pdev->dev, "Sig=0x%x\n", sig);
Jiri Slaby18234f82006-12-08 02:38:51 -08001378 retval = -EIO;
1379 goto end;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001380 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001381
Jiri Slabyf0a0ba62007-02-10 01:44:52 -08001382 msleep(10);
1383
1384 portcount = inw(base + 0x2);
Julia Lawall07fb6f22008-03-04 14:29:17 -08001385 if (!(inw(base + 0xe) & 0x1) || (portcount != 0 && portcount != 4 &&
Jiri Slabyf0a0ba62007-02-10 01:44:52 -08001386 portcount != 8 && portcount != 16)) {
Joe Perches898eb712007-10-18 03:06:30 -07001387 dev_err(&pdev->dev, "ISILoad:PCI Card%d reset failure.\n",
Jiri Slabyf0a0ba62007-02-10 01:44:52 -08001388 card + 1);
1389 retval = -EIO;
1390 goto end;
1391 }
1392
1393 switch (sig) {
Jiri Slaby9ac09482006-01-09 20:54:24 -08001394 case 0xa5:
1395 case 0xbb:
1396 case 0xdd:
Jiri Slaby18234f82006-12-08 02:38:51 -08001397 board->port_count = (portcount == 4) ? 4 : 8;
Jiri Slaby9ac09482006-01-09 20:54:24 -08001398 board->shift_count = 12;
1399 break;
1400 case 0xcc:
Jiri Slabyf0a0ba62007-02-10 01:44:52 -08001401 case 0xee:
Jiri Slaby9ac09482006-01-09 20:54:24 -08001402 board->port_count = 16;
1403 board->shift_count = 11;
1404 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001405 }
Jiri Slaby9ac09482006-01-09 20:54:24 -08001406 dev_info(&pdev->dev, "-Done\n");
Jiri Slabyf0a0ba62007-02-10 01:44:52 -08001407 *signature = sig;
Jiri Slaby9ac09482006-01-09 20:54:24 -08001408
1409end:
1410 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001411}
1412
Jiri Slabye65c1db2006-01-09 20:54:25 -08001413static int __devinit load_firmware(struct pci_dev *pdev,
1414 const unsigned int index, const unsigned int signature)
1415{
1416 struct isi_board *board = pci_get_drvdata(pdev);
1417 const struct firmware *fw;
1418 unsigned long base = board->base;
1419 unsigned int a;
1420 u16 word_count, status;
1421 int retval = -EIO;
1422 char *name;
1423 u8 *data;
1424
1425 struct stframe {
1426 u16 addr;
1427 u16 count;
1428 u8 data[0];
1429 } *frame;
1430
1431 switch (signature) {
1432 case 0xa5:
1433 name = "isi608.bin";
1434 break;
1435 case 0xbb:
1436 name = "isi608em.bin";
1437 break;
1438 case 0xcc:
1439 name = "isi616em.bin";
1440 break;
1441 case 0xdd:
1442 name = "isi4608.bin";
1443 break;
1444 case 0xee:
1445 name = "isi4616.bin";
1446 break;
1447 default:
1448 dev_err(&pdev->dev, "Unknown signature.\n");
1449 goto end;
Alan Cox251b8dd2008-04-30 00:54:12 -07001450 }
Jiri Slabye65c1db2006-01-09 20:54:25 -08001451
1452 retval = request_firmware(&fw, name, &pdev->dev);
1453 if (retval)
1454 goto end;
1455
Jiri Slabye4e04082006-09-30 23:27:50 -07001456 retval = -EIO;
1457
Jiri Slabye65c1db2006-01-09 20:54:25 -08001458 for (frame = (struct stframe *)fw->data;
1459 frame < (struct stframe *)(fw->data + fw->size);
Jiri Slabye4e04082006-09-30 23:27:50 -07001460 frame = (struct stframe *)((u8 *)(frame + 1) +
1461 frame->count)) {
Jiri Slabye65c1db2006-01-09 20:54:25 -08001462 if (WaitTillCardIsFree(base))
1463 goto errrelfw;
1464
1465 outw(0xf0, base); /* start upload sequence */
1466 outw(0x00, base);
1467 outw(frame->addr, base); /* lsb of address */
1468
1469 word_count = frame->count / 2 + frame->count % 2;
1470 outw(word_count, base);
1471 InterruptTheCard(base);
1472
1473 udelay(100); /* 0x2f */
1474
1475 if (WaitTillCardIsFree(base))
1476 goto errrelfw;
1477
Alan Cox251b8dd2008-04-30 00:54:12 -07001478 status = inw(base + 0x4);
1479 if (status != 0) {
Jiri Slabye65c1db2006-01-09 20:54:25 -08001480 dev_warn(&pdev->dev, "Card%d rejected load header:\n"
Joe Perches898eb712007-10-18 03:06:30 -07001481 KERN_WARNING "Address:0x%x\n"
1482 KERN_WARNING "Count:0x%x\n"
1483 KERN_WARNING "Status:0x%x\n",
Jiri Slabye65c1db2006-01-09 20:54:25 -08001484 index + 1, frame->addr, frame->count, status);
1485 goto errrelfw;
1486 }
1487 outsw(base, frame->data, word_count);
1488
1489 InterruptTheCard(base);
1490
1491 udelay(50); /* 0x0f */
1492
1493 if (WaitTillCardIsFree(base))
1494 goto errrelfw;
1495
Alan Cox251b8dd2008-04-30 00:54:12 -07001496 status = inw(base + 0x4);
1497 if (status != 0) {
Jiri Slabye65c1db2006-01-09 20:54:25 -08001498 dev_err(&pdev->dev, "Card%d got out of sync.Card "
1499 "Status:0x%x\n", index + 1, status);
1500 goto errrelfw;
1501 }
Alan Cox251b8dd2008-04-30 00:54:12 -07001502 }
Jiri Slabye65c1db2006-01-09 20:54:25 -08001503
Jiri Slabye65c1db2006-01-09 20:54:25 -08001504/* XXX: should we test it by reading it back and comparing with original like
1505 * in load firmware package? */
Jiri Slabye4e04082006-09-30 23:27:50 -07001506 for (frame = (struct stframe *)fw->data;
1507 frame < (struct stframe *)(fw->data + fw->size);
1508 frame = (struct stframe *)((u8 *)(frame + 1) +
1509 frame->count)) {
Jiri Slabye65c1db2006-01-09 20:54:25 -08001510 if (WaitTillCardIsFree(base))
1511 goto errrelfw;
1512
1513 outw(0xf1, base); /* start download sequence */
1514 outw(0x00, base);
1515 outw(frame->addr, base); /* lsb of address */
1516
1517 word_count = (frame->count >> 1) + frame->count % 2;
1518 outw(word_count + 1, base);
1519 InterruptTheCard(base);
1520
1521 udelay(50); /* 0xf */
1522
1523 if (WaitTillCardIsFree(base))
1524 goto errrelfw;
1525
Alan Cox251b8dd2008-04-30 00:54:12 -07001526 status = inw(base + 0x4);
1527 if (status != 0) {
Jiri Slabye65c1db2006-01-09 20:54:25 -08001528 dev_warn(&pdev->dev, "Card%d rejected verify header:\n"
Joe Perches898eb712007-10-18 03:06:30 -07001529 KERN_WARNING "Address:0x%x\n"
1530 KERN_WARNING "Count:0x%x\n"
1531 KERN_WARNING "Status: 0x%x\n",
Jiri Slabye65c1db2006-01-09 20:54:25 -08001532 index + 1, frame->addr, frame->count, status);
1533 goto errrelfw;
1534 }
1535
1536 data = kmalloc(word_count * 2, GFP_KERNEL);
Jiri Slabyf0671372006-12-08 02:38:54 -08001537 if (data == NULL) {
1538 dev_err(&pdev->dev, "Card%d, firmware upload "
1539 "failed, not enough memory\n", index + 1);
1540 goto errrelfw;
1541 }
Jiri Slabye65c1db2006-01-09 20:54:25 -08001542 inw(base);
1543 insw(base, data, word_count);
1544 InterruptTheCard(base);
1545
1546 for (a = 0; a < frame->count; a++)
1547 if (data[a] != frame->data[a]) {
1548 kfree(data);
1549 dev_err(&pdev->dev, "Card%d, firmware upload "
1550 "failed\n", index + 1);
1551 goto errrelfw;
1552 }
1553 kfree(data);
1554
1555 udelay(50); /* 0xf */
1556
1557 if (WaitTillCardIsFree(base))
1558 goto errrelfw;
1559
Alan Cox251b8dd2008-04-30 00:54:12 -07001560 status = inw(base + 0x4);
1561 if (status != 0) {
Jiri Slabye65c1db2006-01-09 20:54:25 -08001562 dev_err(&pdev->dev, "Card%d verify got out of sync. "
1563 "Card Status:0x%x\n", index + 1, status);
1564 goto errrelfw;
1565 }
1566 }
1567
Jiri Slabye4e04082006-09-30 23:27:50 -07001568 /* xfer ctrl */
1569 if (WaitTillCardIsFree(base))
1570 goto errrelfw;
1571
1572 outw(0xf2, base);
1573 outw(0x800, base);
1574 outw(0x0, base);
1575 outw(0x0, base);
1576 InterruptTheCard(base);
1577 outw(0x0, base + 0x4); /* for ISI4608 cards */
1578
Jiri Slabye65c1db2006-01-09 20:54:25 -08001579 board->status |= FIRMWARE_LOADED;
1580 retval = 0;
1581
1582errrelfw:
1583 release_firmware(fw);
1584end:
1585 return retval;
1586}
1587
Jiri Slaby9ac09482006-01-09 20:54:24 -08001588/*
1589 * Insmod can set static symbols so keep these static
1590 */
Jiri Slaby1ed0c0b2007-02-10 01:44:55 -08001591static unsigned int card_count;
Jiri Slaby9ac09482006-01-09 20:54:24 -08001592
1593static int __devinit isicom_probe(struct pci_dev *pdev,
1594 const struct pci_device_id *ent)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001595{
Jiri Slaby4969b3a2007-07-17 04:05:18 -07001596 unsigned int signature, index;
Jiri Slaby9ac09482006-01-09 20:54:24 -08001597 int retval = -EPERM;
Jiri Slaby9ac09482006-01-09 20:54:24 -08001598 struct isi_board *board = NULL;
1599
Jiri Slaby1ed0c0b2007-02-10 01:44:55 -08001600 if (card_count >= BOARD_COUNT)
Jiri Slaby9ac09482006-01-09 20:54:24 -08001601 goto err;
1602
Jiri Slabye1e57702008-07-16 21:52:56 +01001603 retval = pci_enable_device(pdev);
1604 if (retval) {
1605 dev_err(&pdev->dev, "failed to enable\n");
1606 goto err;
1607 }
1608
Jiri Slaby9ac09482006-01-09 20:54:24 -08001609 dev_info(&pdev->dev, "ISI PCI Card(Device ID 0x%x)\n", ent->device);
1610
1611 /* allot the first empty slot in the array */
1612 for (index = 0; index < BOARD_COUNT; index++)
1613 if (isi_card[index].base == 0) {
1614 board = &isi_card[index];
1615 break;
1616 }
1617
Jiri Slaby938a7022006-12-08 02:38:52 -08001618 board->index = index;
Jiri Slaby4969b3a2007-07-17 04:05:18 -07001619 board->base = pci_resource_start(pdev, 3);
1620 board->irq = pdev->irq;
Jiri Slaby1ed0c0b2007-02-10 01:44:55 -08001621 card_count++;
Jiri Slaby9ac09482006-01-09 20:54:24 -08001622
1623 pci_set_drvdata(pdev, board);
1624
Jiri Slaby78028da2006-12-08 02:38:53 -08001625 retval = pci_request_region(pdev, 3, ISICOM_NAME);
1626 if (retval) {
Jiri Slaby09a4a112006-12-08 02:38:49 -08001627 dev_err(&pdev->dev, "I/O Region 0x%lx-0x%lx is busy. Card%d "
1628 "will be disabled.\n", board->base, board->base + 15,
1629 index + 1);
1630 retval = -EBUSY;
Jiri Slaby1ed0c0b2007-02-10 01:44:55 -08001631 goto errdec;
Alan Cox251b8dd2008-04-30 00:54:12 -07001632 }
Jiri Slaby9ac09482006-01-09 20:54:24 -08001633
Jiri Slaby09a4a112006-12-08 02:38:49 -08001634 retval = request_irq(board->irq, isicom_interrupt,
1635 IRQF_SHARED | IRQF_DISABLED, ISICOM_NAME, board);
1636 if (retval < 0) {
1637 dev_err(&pdev->dev, "Could not install handler at Irq %d. "
1638 "Card%d will be disabled.\n", board->irq, index + 1);
Jiri Slaby9ac09482006-01-09 20:54:24 -08001639 goto errunrr;
Jiri Slaby09a4a112006-12-08 02:38:49 -08001640 }
Jiri Slaby9ac09482006-01-09 20:54:24 -08001641
1642 retval = reset_card(pdev, index, &signature);
1643 if (retval < 0)
1644 goto errunri;
1645
Jiri Slabye65c1db2006-01-09 20:54:25 -08001646 retval = load_firmware(pdev, index, signature);
1647 if (retval < 0)
1648 goto errunri;
1649
Jiri Slaby938a7022006-12-08 02:38:52 -08001650 for (index = 0; index < board->port_count; index++)
1651 tty_register_device(isicom_normal, board->index * 16 + index,
1652 &pdev->dev);
1653
Jiri Slaby9ac09482006-01-09 20:54:24 -08001654 return 0;
1655
1656errunri:
1657 free_irq(board->irq, board);
1658errunrr:
Jiri Slaby78028da2006-12-08 02:38:53 -08001659 pci_release_region(pdev, 3);
Jiri Slaby1ed0c0b2007-02-10 01:44:55 -08001660errdec:
Jiri Slaby9ac09482006-01-09 20:54:24 -08001661 board->base = 0;
Jiri Slaby1ed0c0b2007-02-10 01:44:55 -08001662 card_count--;
Jiri Slabye1e57702008-07-16 21:52:56 +01001663 pci_disable_device(pdev);
Jiri Slaby1ed0c0b2007-02-10 01:44:55 -08001664err:
Jiri Slaby9ac09482006-01-09 20:54:24 -08001665 return retval;
1666}
1667
1668static void __devexit isicom_remove(struct pci_dev *pdev)
1669{
1670 struct isi_board *board = pci_get_drvdata(pdev);
Jiri Slaby938a7022006-12-08 02:38:52 -08001671 unsigned int i;
1672
1673 for (i = 0; i < board->port_count; i++)
1674 tty_unregister_device(isicom_normal, board->index * 16 + i);
Jiri Slaby9ac09482006-01-09 20:54:24 -08001675
1676 free_irq(board->irq, board);
Jiri Slaby78028da2006-12-08 02:38:53 -08001677 pci_release_region(pdev, 3);
Jiri Slaby1ed0c0b2007-02-10 01:44:55 -08001678 board->base = 0;
1679 card_count--;
Jiri Slabye1e57702008-07-16 21:52:56 +01001680 pci_disable_device(pdev);
Jiri Slaby9ac09482006-01-09 20:54:24 -08001681}
1682
Jiri Slabyca262002006-12-08 02:38:50 -08001683static int __init isicom_init(void)
Jiri Slaby9ac09482006-01-09 20:54:24 -08001684{
1685 int retval, idx, channel;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001686 struct isi_port *port;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001687
Alan Cox251b8dd2008-04-30 00:54:12 -07001688 for (idx = 0; idx < BOARD_COUNT; idx++) {
Jiri Slaby9ac09482006-01-09 20:54:24 -08001689 port = &isi_ports[idx * 16];
1690 isi_card[idx].ports = port;
1691 spin_lock_init(&isi_card[idx].card_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001692 for (channel = 0; channel < 16; channel++, port++) {
Alan Cox44b7d1b2008-07-16 21:57:18 +01001693 tty_port_init(&port->port);
Alan Cox31f35932009-01-02 13:45:05 +00001694 port->port.ops = &isicom_port_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001695 port->magic = ISICOM_MAGIC;
Jiri Slaby9ac09482006-01-09 20:54:24 -08001696 port->card = &isi_card[idx];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001697 port->channel = channel;
Alan Cox44b7d1b2008-07-16 21:57:18 +01001698 port->port.close_delay = 50 * HZ/100;
1699 port->port.closing_wait = 3000 * HZ/100;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001700 port->status = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001701 /* . . . */
Alan Cox251b8dd2008-04-30 00:54:12 -07001702 }
Jiri Slaby9ac09482006-01-09 20:54:24 -08001703 isi_card[idx].base = 0;
1704 isi_card[idx].irq = 0;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001705 }
1706
Jiri Slaby09a4a112006-12-08 02:38:49 -08001707 /* tty driver structure initialization */
1708 isicom_normal = alloc_tty_driver(PORT_COUNT);
1709 if (!isicom_normal) {
1710 retval = -ENOMEM;
Jiri Slaby9ac09482006-01-09 20:54:24 -08001711 goto error;
Jiri Slaby09a4a112006-12-08 02:38:49 -08001712 }
1713
1714 isicom_normal->owner = THIS_MODULE;
1715 isicom_normal->name = "ttyM";
1716 isicom_normal->major = ISICOM_NMAJOR;
1717 isicom_normal->minor_start = 0;
1718 isicom_normal->type = TTY_DRIVER_TYPE_SERIAL;
1719 isicom_normal->subtype = SERIAL_TYPE_NORMAL;
1720 isicom_normal->init_termios = tty_std_termios;
1721 isicom_normal->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL |
1722 CLOCAL;
Jiri Slaby938a7022006-12-08 02:38:52 -08001723 isicom_normal->flags = TTY_DRIVER_REAL_RAW |
Alan Cox6d889722008-07-22 11:18:21 +01001724 TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_HARDWARE_BREAK;
Jiri Slaby09a4a112006-12-08 02:38:49 -08001725 tty_set_operations(isicom_normal, &isicom_ops);
1726
1727 retval = tty_register_driver(isicom_normal);
1728 if (retval) {
1729 pr_dbg("Couldn't register the dialin driver\n");
1730 goto err_puttty;
1731 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001732
Jiri Slaby9ac09482006-01-09 20:54:24 -08001733 retval = pci_register_driver(&isicom_driver);
1734 if (retval < 0) {
1735 printk(KERN_ERR "ISICOM: Unable to register pci driver.\n");
Jiri Slaby09a4a112006-12-08 02:38:49 -08001736 goto err_unrtty;
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001737 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001738
Jiri Slaby34b55b82006-12-08 02:38:55 -08001739 mod_timer(&tx, jiffies + 1);
Jiri Slabyd8d16e42006-01-09 20:54:21 -08001740
Linus Torvalds1da177e2005-04-16 15:20:36 -07001741 return 0;
Jiri Slaby09a4a112006-12-08 02:38:49 -08001742err_unrtty:
1743 tty_unregister_driver(isicom_normal);
1744err_puttty:
1745 put_tty_driver(isicom_normal);
Jiri Slaby9ac09482006-01-09 20:54:24 -08001746error:
1747 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001748}
1749
1750static void __exit isicom_exit(void)
1751{
Jiri Slabye3273252007-07-17 04:05:18 -07001752 del_timer_sync(&tx);
Jiri Slabyaaa246e2006-01-09 20:54:23 -08001753
Jiri Slaby9ac09482006-01-09 20:54:24 -08001754 pci_unregister_driver(&isicom_driver);
Jiri Slaby09a4a112006-12-08 02:38:49 -08001755 tty_unregister_driver(isicom_normal);
1756 put_tty_driver(isicom_normal);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001757}
1758
Jiri Slabyca262002006-12-08 02:38:50 -08001759module_init(isicom_init);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001760module_exit(isicom_exit);
Jiri Slabyaaa246e2006-01-09 20:54:23 -08001761
1762MODULE_AUTHOR("MultiTech");
1763MODULE_DESCRIPTION("Driver for the ISI series of cards by MultiTech");
1764MODULE_LICENSE("GPL");