blob: da2d2cf16f555f99e9715a596bf8caf445d6be6f [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 Copyright (C) 1996 Digi International.
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07003
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 For technical support please email digiLinux@dgii.com or
5 call Digi tech support at (612) 912-3456
6
Alan Coxf2cf8e22005-09-06 15:16:44 -07007 ** This driver is no longer supported by Digi **
8
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07009 Much of this design and code came from epca.c which was
10 copyright (C) 1994, 1995 Troy De Jongh, and subsquently
11 modified by David Nugent, Christoph Lameter, Mike McLagan.
Linus Torvalds1da177e2005-04-16 15:20:36 -070012
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -070013 This program is free software; you can redistribute it and/or modify
14 it under the terms of the GNU General Public License as published by
15 the Free Software Foundation; either version 2 of the License, or
16 (at your option) any later version.
Linus Torvalds1da177e2005-04-16 15:20:36 -070017
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -070018 This program is distributed in the hope that it will be useful,
19 but WITHOUT ANY WARRANTY; without even the implied warranty of
20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 GNU General Public License for more details.
Linus Torvalds1da177e2005-04-16 15:20:36 -070022
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -070023 You should have received a copy of the GNU General Public License
24 along with this program; if not, write to the Free Software
25 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26*/
Linus Torvalds1da177e2005-04-16 15:20:36 -070027/* See README.epca for change history --DAT*/
28
Linus Torvalds1da177e2005-04-16 15:20:36 -070029#include <linux/module.h>
30#include <linux/kernel.h>
31#include <linux/types.h>
32#include <linux/init.h>
33#include <linux/serial.h>
34#include <linux/delay.h>
35#include <linux/ctype.h>
36#include <linux/tty.h>
37#include <linux/tty_flip.h>
38#include <linux/slab.h>
39#include <linux/ioport.h>
40#include <linux/interrupt.h>
Alan Cox191260a2008-04-30 00:54:16 -070041#include <linux/uaccess.h>
42#include <linux/io.h>
Alan Coxf2cf8e22005-09-06 15:16:44 -070043#include <linux/spinlock.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070044#include <linux/pci.h>
45#include "digiPCI.h"
Alan Coxf2cf8e22005-09-06 15:16:44 -070046
Linus Torvalds1da177e2005-04-16 15:20:36 -070047
48#include "digi1.h"
49#include "digiFep1.h"
50#include "epca.h"
51#include "epcaconfig.h"
52
Alan Coxf2cf8e22005-09-06 15:16:44 -070053#define VERSION "1.3.0.1-LK2.6"
Linus Torvalds1da177e2005-04-16 15:20:36 -070054
55/* This major needs to be submitted to Linux to join the majors list */
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -070056#define DIGIINFOMAJOR 35 /* For Digi specific ioctl */
Linus Torvalds1da177e2005-04-16 15:20:36 -070057
58
59#define MAXCARDS 7
60#define epcaassert(x, msg) if (!(x)) epca_error(__LINE__, msg)
61
62#define PFX "epca: "
63
Linus Torvalds1da177e2005-04-16 15:20:36 -070064static int nbdevs, num_cards, liloconfig;
65static int digi_poller_inhibited = 1 ;
66
67static int setup_error_code;
68static int invalid_lilo_config;
69
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -070070/*
71 * The ISA boards do window flipping into the same spaces so its only sane with
72 * a single lock. It's still pretty efficient.
73 */
Ingo Molnar34af9462006-06-27 02:53:55 -070074static DEFINE_SPINLOCK(epca_lock);
Alan Coxf2cf8e22005-09-06 15:16:44 -070075
Alan Cox191260a2008-04-30 00:54:16 -070076/* MAXBOARDS is typically 12, but ISA and EISA cards are restricted
77 to 7 below. */
Linus Torvalds1da177e2005-04-16 15:20:36 -070078static struct board_info boards[MAXBOARDS];
79
Linus Torvalds1da177e2005-04-16 15:20:36 -070080static struct tty_driver *pc_driver;
81static struct tty_driver *pc_info;
82
83/* ------------------ Begin Digi specific structures -------------------- */
84
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -070085/*
86 * digi_channels represents an array of structures that keep track of each
87 * channel of the Digi product. Information such as transmit and receive
88 * pointers, termio data, and signal definitions (DTR, CTS, etc ...) are stored
89 * here. This structure is NOT used to overlay the cards physical channel
90 * structure.
91 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070092static struct channel digi_channels[MAX_ALLOC];
93
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -070094/*
95 * card_ptr is an array used to hold the address of the first channel structure
96 * of each card. This array will hold the addresses of various channels located
97 * in digi_channels.
98 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070099static struct channel *card_ptr[MAXCARDS];
100
101static struct timer_list epca_timer;
102
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700103/*
104 * Begin generic memory functions. These functions will be alias (point at)
105 * more specific functions dependent on the board being configured.
106 */
Alan Coxf2cf8e22005-09-06 15:16:44 -0700107static void memwinon(struct board_info *b, unsigned int win);
108static void memwinoff(struct board_info *b, unsigned int win);
109static void globalwinon(struct channel *ch);
110static void rxwinon(struct channel *ch);
111static void txwinon(struct channel *ch);
112static void memoff(struct channel *ch);
113static void assertgwinon(struct channel *ch);
114static void assertmemoff(struct channel *ch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115
116/* ---- Begin more 'specific' memory functions for cx_like products --- */
117
Alan Coxf2cf8e22005-09-06 15:16:44 -0700118static void pcxem_memwinon(struct board_info *b, unsigned int win);
119static void pcxem_memwinoff(struct board_info *b, unsigned int win);
120static void pcxem_globalwinon(struct channel *ch);
121static void pcxem_rxwinon(struct channel *ch);
122static void pcxem_txwinon(struct channel *ch);
123static void pcxem_memoff(struct channel *ch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124
125/* ------ Begin more 'specific' memory functions for the pcxe ------- */
126
Alan Coxf2cf8e22005-09-06 15:16:44 -0700127static void pcxe_memwinon(struct board_info *b, unsigned int win);
128static void pcxe_memwinoff(struct board_info *b, unsigned int win);
129static void pcxe_globalwinon(struct channel *ch);
130static void pcxe_rxwinon(struct channel *ch);
131static void pcxe_txwinon(struct channel *ch);
132static void pcxe_memoff(struct channel *ch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133
134/* ---- Begin more 'specific' memory functions for the pc64xe and pcxi ---- */
135/* Note : pc64xe and pcxi share the same windowing routines */
136
Alan Coxf2cf8e22005-09-06 15:16:44 -0700137static void pcxi_memwinon(struct board_info *b, unsigned int win);
138static void pcxi_memwinoff(struct board_info *b, unsigned int win);
139static void pcxi_globalwinon(struct channel *ch);
140static void pcxi_rxwinon(struct channel *ch);
141static void pcxi_txwinon(struct channel *ch);
142static void pcxi_memoff(struct channel *ch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143
144/* - Begin 'specific' do nothing memory functions needed for some cards - */
145
Alan Coxf2cf8e22005-09-06 15:16:44 -0700146static void dummy_memwinon(struct board_info *b, unsigned int win);
147static void dummy_memwinoff(struct board_info *b, unsigned int win);
148static void dummy_globalwinon(struct channel *ch);
149static void dummy_rxwinon(struct channel *ch);
150static void dummy_txwinon(struct channel *ch);
151static void dummy_memoff(struct channel *ch);
152static void dummy_assertgwinon(struct channel *ch);
153static void dummy_assertmemoff(struct channel *ch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154
Alan Coxf2cf8e22005-09-06 15:16:44 -0700155static struct channel *verifyChannel(struct tty_struct *);
156static void pc_sched_event(struct channel *, int);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157static void epca_error(int, char *);
158static void pc_close(struct tty_struct *, struct file *);
159static void shutdown(struct channel *);
160static void pc_hangup(struct tty_struct *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161static int pc_write_room(struct tty_struct *);
162static int pc_chars_in_buffer(struct tty_struct *);
163static void pc_flush_buffer(struct tty_struct *);
164static void pc_flush_chars(struct tty_struct *);
165static int block_til_ready(struct tty_struct *, struct file *,
Alan Cox191260a2008-04-30 00:54:16 -0700166 struct channel *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167static int pc_open(struct tty_struct *, struct file *);
168static void post_fep_init(unsigned int crd);
169static void epcapoll(unsigned long);
170static void doevent(int);
171static void fepcmd(struct channel *, int, int, int, int, int);
172static unsigned termios2digi_h(struct channel *ch, unsigned);
173static unsigned termios2digi_i(struct channel *ch, unsigned);
174static unsigned termios2digi_c(struct channel *ch, unsigned);
175static void epcaparam(struct tty_struct *, struct channel *);
176static void receive_data(struct channel *);
177static int pc_ioctl(struct tty_struct *, struct file *,
Alan Cox191260a2008-04-30 00:54:16 -0700178 unsigned int, unsigned long);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179static int info_ioctl(struct tty_struct *, struct file *,
Alan Cox191260a2008-04-30 00:54:16 -0700180 unsigned int, unsigned long);
Alan Cox606d0992006-12-08 02:38:45 -0800181static void pc_set_termios(struct tty_struct *, struct ktermios *);
David Howellsc4028952006-11-22 14:57:56 +0000182static void do_softint(struct work_struct *work);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183static void pc_stop(struct tty_struct *);
184static void pc_start(struct tty_struct *);
Alan Cox191260a2008-04-30 00:54:16 -0700185static void pc_throttle(struct tty_struct *tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186static void pc_unthrottle(struct tty_struct *tty);
Alan Coxdcbf1282008-07-22 11:18:12 +0100187static int pc_send_break(struct tty_struct *tty, int msec);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188static void setup_empty_event(struct tty_struct *tty, struct channel *ch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190static int pc_write(struct tty_struct *, const unsigned char *, int);
Alan Coxf2cf8e22005-09-06 15:16:44 -0700191static int pc_init(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192static int init_PCI(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700194/*
195 * Table of functions for each board to handle memory. Mantaining parallelism
196 * is a *very* good idea here. The idea is for the runtime code to blindly call
197 * these functions, not knowing/caring about the underlying hardware. This
198 * stuff should contain no conditionals; if more functionality is needed a
199 * different entry should be established. These calls are the interface calls
200 * and are the only functions that should be accessed. Anyone caught making
201 * direct calls deserves what they get.
202 */
Alan Coxf2cf8e22005-09-06 15:16:44 -0700203static void memwinon(struct board_info *b, unsigned int win)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204{
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700205 b->memwinon(b, win);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206}
207
Alan Coxf2cf8e22005-09-06 15:16:44 -0700208static void memwinoff(struct board_info *b, unsigned int win)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209{
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700210 b->memwinoff(b, win);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211}
212
Alan Coxf2cf8e22005-09-06 15:16:44 -0700213static void globalwinon(struct channel *ch)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214{
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700215 ch->board->globalwinon(ch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216}
217
Alan Coxf2cf8e22005-09-06 15:16:44 -0700218static void rxwinon(struct channel *ch)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219{
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700220 ch->board->rxwinon(ch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221}
222
Alan Coxf2cf8e22005-09-06 15:16:44 -0700223static void txwinon(struct channel *ch)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224{
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700225 ch->board->txwinon(ch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226}
227
Alan Coxf2cf8e22005-09-06 15:16:44 -0700228static void memoff(struct channel *ch)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229{
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700230 ch->board->memoff(ch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231}
Alan Coxf2cf8e22005-09-06 15:16:44 -0700232static void assertgwinon(struct channel *ch)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233{
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700234 ch->board->assertgwinon(ch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235}
236
Alan Coxf2cf8e22005-09-06 15:16:44 -0700237static void assertmemoff(struct channel *ch)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238{
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700239 ch->board->assertmemoff(ch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240}
241
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700242/* PCXEM windowing is the same as that used in the PCXR and CX series cards. */
Alan Coxf2cf8e22005-09-06 15:16:44 -0700243static void pcxem_memwinon(struct board_info *b, unsigned int win)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244{
Alan Cox191260a2008-04-30 00:54:16 -0700245 outb_p(FEPWIN | win, b->port + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246}
247
Alan Coxf2cf8e22005-09-06 15:16:44 -0700248static void pcxem_memwinoff(struct board_info *b, unsigned int win)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249{
Alan Coxf2cf8e22005-09-06 15:16:44 -0700250 outb_p(0, b->port + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251}
252
Alan Coxf2cf8e22005-09-06 15:16:44 -0700253static void pcxem_globalwinon(struct channel *ch)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254{
Alan Cox191260a2008-04-30 00:54:16 -0700255 outb_p(FEPWIN, (int)ch->board->port + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256}
257
Alan Coxf2cf8e22005-09-06 15:16:44 -0700258static void pcxem_rxwinon(struct channel *ch)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259{
260 outb_p(ch->rxwin, (int)ch->board->port + 1);
261}
262
Alan Coxf2cf8e22005-09-06 15:16:44 -0700263static void pcxem_txwinon(struct channel *ch)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264{
265 outb_p(ch->txwin, (int)ch->board->port + 1);
266}
267
Alan Coxf2cf8e22005-09-06 15:16:44 -0700268static void pcxem_memoff(struct channel *ch)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269{
270 outb_p(0, (int)ch->board->port + 1);
271}
272
273/* ----------------- Begin pcxe memory window stuff ------------------ */
Alan Coxf2cf8e22005-09-06 15:16:44 -0700274static void pcxe_memwinon(struct board_info *b, unsigned int win)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275{
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700276 outb_p(FEPWIN | win, b->port + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277}
278
Alan Coxf2cf8e22005-09-06 15:16:44 -0700279static void pcxe_memwinoff(struct board_info *b, unsigned int win)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280{
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700281 outb_p(inb(b->port) & ~FEPMEM, b->port + 1);
Alan Coxf2cf8e22005-09-06 15:16:44 -0700282 outb_p(0, b->port + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283}
284
Alan Coxf2cf8e22005-09-06 15:16:44 -0700285static void pcxe_globalwinon(struct channel *ch)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286{
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700287 outb_p(FEPWIN, (int)ch->board->port + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288}
289
Alan Coxf2cf8e22005-09-06 15:16:44 -0700290static void pcxe_rxwinon(struct channel *ch)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291{
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700292 outb_p(ch->rxwin, (int)ch->board->port + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293}
294
Alan Coxf2cf8e22005-09-06 15:16:44 -0700295static void pcxe_txwinon(struct channel *ch)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296{
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700297 outb_p(ch->txwin, (int)ch->board->port + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298}
299
Alan Coxf2cf8e22005-09-06 15:16:44 -0700300static void pcxe_memoff(struct channel *ch)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301{
302 outb_p(0, (int)ch->board->port);
303 outb_p(0, (int)ch->board->port + 1);
304}
305
306/* ------------- Begin pc64xe and pcxi memory window stuff -------------- */
Alan Coxf2cf8e22005-09-06 15:16:44 -0700307static void pcxi_memwinon(struct board_info *b, unsigned int win)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308{
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700309 outb_p(inb(b->port) | FEPMEM, b->port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310}
311
Alan Coxf2cf8e22005-09-06 15:16:44 -0700312static void pcxi_memwinoff(struct board_info *b, unsigned int win)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313{
Alan Coxf2cf8e22005-09-06 15:16:44 -0700314 outb_p(inb(b->port) & ~FEPMEM, b->port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315}
316
Alan Coxf2cf8e22005-09-06 15:16:44 -0700317static void pcxi_globalwinon(struct channel *ch)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318{
Alan Coxf2cf8e22005-09-06 15:16:44 -0700319 outb_p(FEPMEM, ch->board->port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320}
321
Alan Coxf2cf8e22005-09-06 15:16:44 -0700322static void pcxi_rxwinon(struct channel *ch)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323{
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700324 outb_p(FEPMEM, ch->board->port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325}
326
Alan Coxf2cf8e22005-09-06 15:16:44 -0700327static void pcxi_txwinon(struct channel *ch)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328{
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700329 outb_p(FEPMEM, ch->board->port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330}
331
Alan Coxf2cf8e22005-09-06 15:16:44 -0700332static void pcxi_memoff(struct channel *ch)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333{
Alan Coxf2cf8e22005-09-06 15:16:44 -0700334 outb_p(0, ch->board->port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335}
336
Alan Coxf2cf8e22005-09-06 15:16:44 -0700337static void pcxi_assertgwinon(struct channel *ch)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338{
Alan Coxf2cf8e22005-09-06 15:16:44 -0700339 epcaassert(inb(ch->board->port) & FEPMEM, "Global memory off");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340}
341
Alan Coxf2cf8e22005-09-06 15:16:44 -0700342static void pcxi_assertmemoff(struct channel *ch)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343{
Alan Coxf2cf8e22005-09-06 15:16:44 -0700344 epcaassert(!(inb(ch->board->port) & FEPMEM), "Memory on");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345}
346
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700347/*
348 * Not all of the cards need specific memory windowing routines. Some cards
349 * (Such as PCI) needs no windowing routines at all. We provide these do
350 * nothing routines so that the same code base can be used. The driver will
351 * ALWAYS call a windowing routine if it thinks it needs to; regardless of the
352 * card. However, dependent on the card the routine may or may not do anything.
353 */
Alan Coxf2cf8e22005-09-06 15:16:44 -0700354static void dummy_memwinon(struct board_info *b, unsigned int win)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355{
356}
357
Alan Coxf2cf8e22005-09-06 15:16:44 -0700358static void dummy_memwinoff(struct board_info *b, unsigned int win)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359{
360}
361
Alan Coxf2cf8e22005-09-06 15:16:44 -0700362static void dummy_globalwinon(struct channel *ch)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363{
364}
365
Alan Coxf2cf8e22005-09-06 15:16:44 -0700366static void dummy_rxwinon(struct channel *ch)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367{
368}
369
Alan Coxf2cf8e22005-09-06 15:16:44 -0700370static void dummy_txwinon(struct channel *ch)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371{
372}
373
Alan Coxf2cf8e22005-09-06 15:16:44 -0700374static void dummy_memoff(struct channel *ch)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375{
376}
377
Alan Coxf2cf8e22005-09-06 15:16:44 -0700378static void dummy_assertgwinon(struct channel *ch)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379{
380}
381
Alan Coxf2cf8e22005-09-06 15:16:44 -0700382static void dummy_assertmemoff(struct channel *ch)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383{
384}
385
Alan Coxf2cf8e22005-09-06 15:16:44 -0700386static struct channel *verifyChannel(struct tty_struct *tty)
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700387{
388 /*
389 * This routine basically provides a sanity check. It insures that the
390 * channel returned is within the proper range of addresses as well as
391 * properly initialized. If some bogus info gets passed in
392 * through tty->driver_data this should catch it.
393 */
Alan Coxf2cf8e22005-09-06 15:16:44 -0700394 if (tty) {
Alan Coxc9f19e92009-01-02 13:47:26 +0000395 struct channel *ch = tty->driver_data;
Alan Cox191260a2008-04-30 00:54:16 -0700396 if (ch >= &digi_channels[0] && ch < &digi_channels[nbdevs]) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397 if (ch->magic == EPCA_MAGIC)
398 return ch;
399 }
Alan Coxf2cf8e22005-09-06 15:16:44 -0700400 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 return NULL;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700402}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403
Alan Coxf2cf8e22005-09-06 15:16:44 -0700404static void pc_sched_event(struct channel *ch, int event)
405{
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700406 /*
407 * We call this to schedule interrupt processing on some event. The
408 * kernel sees our request and calls the related routine in OUR driver.
409 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 ch->event |= 1 << event;
411 schedule_work(&ch->tqueue);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700412}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413
414static void epca_error(int line, char *msg)
Alan Coxf2cf8e22005-09-06 15:16:44 -0700415{
Alan Cox191260a2008-04-30 00:54:16 -0700416 printk(KERN_ERR "epca_error (Digi): line = %d %s\n", line, msg);
Alan Coxf2cf8e22005-09-06 15:16:44 -0700417}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700419static void pc_close(struct tty_struct *tty, struct file *filp)
Alan Coxf2cf8e22005-09-06 15:16:44 -0700420{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421 struct channel *ch;
422 unsigned long flags;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700423 /*
424 * verifyChannel returns the channel from the tty struct if it is
425 * valid. This serves as a sanity check.
426 */
Alan Cox191260a2008-04-30 00:54:16 -0700427 ch = verifyChannel(tty);
428 if (ch != NULL) {
Alan Coxf2cf8e22005-09-06 15:16:44 -0700429 spin_lock_irqsave(&epca_lock, flags);
430 if (tty_hung_up_p(filp)) {
431 spin_unlock_irqrestore(&epca_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432 return;
433 }
Alan Cox52d41732008-07-16 21:55:02 +0100434 if (ch->port.count-- > 1) {
Alan Coxf2cf8e22005-09-06 15:16:44 -0700435 /* Begin channel is open more than once */
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700436 /*
437 * Return without doing anything. Someone might still
438 * be using the channel.
439 */
Alan Coxf2cf8e22005-09-06 15:16:44 -0700440 spin_unlock_irqrestore(&epca_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441 return;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700442 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443 /* Port open only once go ahead with shutdown & reset */
Alan Cox52d41732008-07-16 21:55:02 +0100444 BUG_ON(ch->port.count < 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700446 /*
447 * Let the rest of the driver know the channel is being closed.
448 * This becomes important if an open is attempted before close
449 * is finished.
450 */
Alan Cox52d41732008-07-16 21:55:02 +0100451 ch->port.flags |= ASYNC_CLOSING;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452 tty->closing = 1;
453
Alan Coxf2cf8e22005-09-06 15:16:44 -0700454 spin_unlock_irqrestore(&epca_lock, flags);
455
Alan Cox52d41732008-07-16 21:55:02 +0100456 if (ch->port.flags & ASYNC_INITIALIZED) {
Alan Cox191260a2008-04-30 00:54:16 -0700457 /* Setup an event to indicate when the
458 transmit buffer empties */
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700459 setup_empty_event(tty, ch);
Alan Cox191260a2008-04-30 00:54:16 -0700460 /* 30 seconds timeout */
461 tty_wait_until_sent(tty, 3000);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462 }
Alan Cox978e5952008-04-30 00:53:59 -0700463 pc_flush_buffer(tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464
465 tty_ldisc_flush(tty);
466 shutdown(ch);
Alan Coxf2cf8e22005-09-06 15:16:44 -0700467
468 spin_lock_irqsave(&epca_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 tty->closing = 0;
470 ch->event = 0;
Alan Cox52d41732008-07-16 21:55:02 +0100471 ch->port.tty = NULL;
Alan Coxf2cf8e22005-09-06 15:16:44 -0700472 spin_unlock_irqrestore(&epca_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473
Alan Cox52d41732008-07-16 21:55:02 +0100474 if (ch->port.blocked_open) {
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700475 if (ch->close_delay)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476 msleep_interruptible(jiffies_to_msecs(ch->close_delay));
Alan Cox52d41732008-07-16 21:55:02 +0100477 wake_up_interruptible(&ch->port.open_wait);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700478 }
Alan Cox52d41732008-07-16 21:55:02 +0100479 ch->port.flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_INITIALIZED |
Alan Cox191260a2008-04-30 00:54:16 -0700480 ASYNC_CLOSING);
Alan Cox52d41732008-07-16 21:55:02 +0100481 wake_up_interruptible(&ch->port.close_wait);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700482 }
483}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484
485static void shutdown(struct channel *ch)
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700486{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487 unsigned long flags;
488 struct tty_struct *tty;
Al Virobc9a5152005-09-15 22:53:28 +0100489 struct board_chan __iomem *bc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490
Alan Cox52d41732008-07-16 21:55:02 +0100491 if (!(ch->port.flags & ASYNC_INITIALIZED))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 return;
493
Alan Coxf2cf8e22005-09-06 15:16:44 -0700494 spin_lock_irqsave(&epca_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495
Alan Coxf2cf8e22005-09-06 15:16:44 -0700496 globalwinon(ch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497 bc = ch->brdchan;
498
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700499 /*
500 * In order for an event to be generated on the receipt of data the
501 * idata flag must be set. Since we are shutting down, this is not
502 * necessary clear this flag.
503 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504 if (bc)
Alan Coxf2cf8e22005-09-06 15:16:44 -0700505 writeb(0, &bc->idata);
Alan Cox52d41732008-07-16 21:55:02 +0100506 tty = ch->port.tty;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700508 /* If we're a modem control device and HUPCL is on, drop RTS & DTR. */
Alan Coxf2cf8e22005-09-06 15:16:44 -0700509 if (tty->termios->c_cflag & HUPCL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 ch->omodem &= ~(ch->m_rts | ch->m_dtr);
511 fepcmd(ch, SETMODEM, 0, ch->m_dtr | ch->m_rts, 10, 1);
512 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513 memoff(ch);
514
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700515 /*
516 * The channel has officialy been closed. The next time it is opened it
517 * will have to reinitialized. Set a flag to indicate this.
518 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519 /* Prevent future Digi programmed interrupts from coming active */
Alan Cox52d41732008-07-16 21:55:02 +0100520 ch->port.flags &= ~ASYNC_INITIALIZED;
Alan Coxf2cf8e22005-09-06 15:16:44 -0700521 spin_unlock_irqrestore(&epca_lock, flags);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700522}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523
524static void pc_hangup(struct tty_struct *tty)
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700525{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526 struct channel *ch;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700527 /*
528 * verifyChannel returns the channel from the tty struct if it is
529 * valid. This serves as a sanity check.
530 */
Alan Cox191260a2008-04-30 00:54:16 -0700531 ch = verifyChannel(tty);
532 if (ch != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533 unsigned long flags;
534
Alan Cox978e5952008-04-30 00:53:59 -0700535 pc_flush_buffer(tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536 tty_ldisc_flush(tty);
537 shutdown(ch);
538
Alan Coxf2cf8e22005-09-06 15:16:44 -0700539 spin_lock_irqsave(&epca_lock, flags);
Alan Cox52d41732008-07-16 21:55:02 +0100540 ch->port.tty = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700541 ch->event = 0;
Alan Cox52d41732008-07-16 21:55:02 +0100542 ch->port.count = 0;
543 ch->port.flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_INITIALIZED);
Alan Coxf2cf8e22005-09-06 15:16:44 -0700544 spin_unlock_irqrestore(&epca_lock, flags);
Alan Cox52d41732008-07-16 21:55:02 +0100545 wake_up_interruptible(&ch->port.open_wait);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700546 }
547}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700549static int pc_write(struct tty_struct *tty,
Alan Cox191260a2008-04-30 00:54:16 -0700550 const unsigned char *buf, int bytesAvailable)
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700551{
Alan Coxf2cf8e22005-09-06 15:16:44 -0700552 unsigned int head, tail;
553 int dataLen;
554 int size;
555 int amountCopied;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556 struct channel *ch;
557 unsigned long flags;
558 int remain;
Al Virobc9a5152005-09-15 22:53:28 +0100559 struct board_chan __iomem *bc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700561 /*
562 * pc_write is primarily called directly by the kernel routine
563 * tty_write (Though it can also be called by put_char) found in
564 * tty_io.c. pc_write is passed a line discipline buffer where the data
565 * to be written out is stored. The line discipline implementation
566 * itself is done at the kernel level and is not brought into the
567 * driver.
568 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700570 /*
571 * verifyChannel returns the channel from the tty struct if it is
572 * valid. This serves as a sanity check.
573 */
Alan Cox191260a2008-04-30 00:54:16 -0700574 ch = verifyChannel(tty);
575 if (ch == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576 return 0;
577
578 /* Make a pointer to the channel data structure found on the board. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579 bc = ch->brdchan;
580 size = ch->txbufsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581 amountCopied = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582
Alan Coxf2cf8e22005-09-06 15:16:44 -0700583 spin_lock_irqsave(&epca_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584 globalwinon(ch);
585
Alan Coxf2cf8e22005-09-06 15:16:44 -0700586 head = readw(&bc->tin) & (size - 1);
587 tail = readw(&bc->tout);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588
Alan Coxf2cf8e22005-09-06 15:16:44 -0700589 if (tail != readw(&bc->tout))
590 tail = readw(&bc->tout);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591 tail &= (size - 1);
592
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700593 if (head >= tail) {
594 /* head has not wrapped */
595 /*
596 * remain (much like dataLen above) represents the total amount
597 * of space available on the card for data. Here dataLen
598 * represents the space existing between the head pointer and
599 * the end of buffer. This is important because a memcpy cannot
600 * be told to automatically wrap around when it hits the buffer
601 * end.
602 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603 dataLen = size - head;
604 remain = size - (head - tail) - 1;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700605 } else {
606 /* head has wrapped around */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607 remain = tail - head - 1;
608 dataLen = remain;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700609 }
610 /*
611 * Check the space on the card. If we have more data than space; reduce
612 * the amount of data to fit the space.
613 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614 bytesAvailable = min(remain, bytesAvailable);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615 txwinon(ch);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700616 while (bytesAvailable > 0) {
617 /* there is data to copy onto card */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700619 /*
620 * If head is not wrapped, the below will make sure the first
621 * data copy fills to the end of card buffer.
622 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623 dataLen = min(bytesAvailable, dataLen);
Al Virobc9a5152005-09-15 22:53:28 +0100624 memcpy_toio(ch->txptr + head, buf, dataLen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625 buf += dataLen;
626 head += dataLen;
627 amountCopied += dataLen;
628 bytesAvailable -= dataLen;
629
Alan Coxf2cf8e22005-09-06 15:16:44 -0700630 if (head >= size) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700631 head = 0;
632 dataLen = tail;
633 }
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700634 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700635 ch->statusflags |= TXBUSY;
636 globalwinon(ch);
Alan Coxf2cf8e22005-09-06 15:16:44 -0700637 writew(head, &bc->tin);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638
Alan Coxf2cf8e22005-09-06 15:16:44 -0700639 if ((ch->statusflags & LOWWAIT) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640 ch->statusflags |= LOWWAIT;
Alan Coxf2cf8e22005-09-06 15:16:44 -0700641 writeb(1, &bc->ilow);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642 }
643 memoff(ch);
Alan Coxf2cf8e22005-09-06 15:16:44 -0700644 spin_unlock_irqrestore(&epca_lock, flags);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700645 return amountCopied;
646}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648static int pc_write_room(struct tty_struct *tty)
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700649{
Alan Cox191260a2008-04-30 00:54:16 -0700650 int remain = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651 struct channel *ch;
652 unsigned long flags;
653 unsigned int head, tail;
Al Virobc9a5152005-09-15 22:53:28 +0100654 struct board_chan __iomem *bc;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700655 /*
656 * verifyChannel returns the channel from the tty struct if it is
657 * valid. This serves as a sanity check.
658 */
Alan Cox191260a2008-04-30 00:54:16 -0700659 ch = verifyChannel(tty);
660 if (ch != NULL) {
Alan Coxf2cf8e22005-09-06 15:16:44 -0700661 spin_lock_irqsave(&epca_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662 globalwinon(ch);
663
664 bc = ch->brdchan;
Alan Coxf2cf8e22005-09-06 15:16:44 -0700665 head = readw(&bc->tin) & (ch->txbufsize - 1);
666 tail = readw(&bc->tout);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667
Alan Coxf2cf8e22005-09-06 15:16:44 -0700668 if (tail != readw(&bc->tout))
669 tail = readw(&bc->tout);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670 /* Wrap tail if necessary */
671 tail &= (ch->txbufsize - 1);
Alan Cox191260a2008-04-30 00:54:16 -0700672 remain = tail - head - 1;
673 if (remain < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674 remain += ch->txbufsize;
675
Alan Coxf2cf8e22005-09-06 15:16:44 -0700676 if (remain && (ch->statusflags & LOWWAIT) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677 ch->statusflags |= LOWWAIT;
Alan Coxf2cf8e22005-09-06 15:16:44 -0700678 writeb(1, &bc->ilow);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700679 }
680 memoff(ch);
Alan Coxf2cf8e22005-09-06 15:16:44 -0700681 spin_unlock_irqrestore(&epca_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683 /* Return how much room is left on card */
684 return remain;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700685}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700686
687static int pc_chars_in_buffer(struct tty_struct *tty)
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700688{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689 int chars;
690 unsigned int ctail, head, tail;
691 int remain;
692 unsigned long flags;
693 struct channel *ch;
Al Virobc9a5152005-09-15 22:53:28 +0100694 struct board_chan __iomem *bc;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700695 /*
696 * verifyChannel returns the channel from the tty struct if it is
697 * valid. This serves as a sanity check.
698 */
Alan Cox191260a2008-04-30 00:54:16 -0700699 ch = verifyChannel(tty);
700 if (ch == NULL)
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700701 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702
Alan Coxf2cf8e22005-09-06 15:16:44 -0700703 spin_lock_irqsave(&epca_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700704 globalwinon(ch);
705
706 bc = ch->brdchan;
Alan Coxf2cf8e22005-09-06 15:16:44 -0700707 tail = readw(&bc->tout);
708 head = readw(&bc->tin);
709 ctail = readw(&ch->mailbox->cout);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710
Alan Cox191260a2008-04-30 00:54:16 -0700711 if (tail == head && readw(&ch->mailbox->cin) == ctail &&
712 readb(&bc->tbusy) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713 chars = 0;
Alan Coxf2cf8e22005-09-06 15:16:44 -0700714 else { /* Begin if some space on the card has been used */
715 head = readw(&bc->tin) & (ch->txbufsize - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716 tail &= (ch->txbufsize - 1);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700717 /*
718 * The logic here is basically opposite of the above
719 * pc_write_room here we are finding the amount of bytes in the
720 * buffer filled. Not the amount of bytes empty.
721 */
Alan Cox191260a2008-04-30 00:54:16 -0700722 remain = tail - head - 1;
723 if (remain < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700724 remain += ch->txbufsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725 chars = (int)(ch->txbufsize - remain);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700726 /*
727 * Make it possible to wakeup anything waiting for output in
728 * tty_ioctl.c, etc.
729 *
730 * If not already set. Setup an event to indicate when the
731 * transmit buffer empties.
732 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733 if (!(ch->statusflags & EMPTYWAIT))
Alan Cox191260a2008-04-30 00:54:16 -0700734 setup_empty_event(tty, ch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735 } /* End if some space on the card has been used */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700736 memoff(ch);
Alan Coxf2cf8e22005-09-06 15:16:44 -0700737 spin_unlock_irqrestore(&epca_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700738 /* Return number of characters residing on card. */
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700739 return chars;
740}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700741
742static void pc_flush_buffer(struct tty_struct *tty)
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700743{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700744 unsigned int tail;
745 unsigned long flags;
746 struct channel *ch;
Al Virobc9a5152005-09-15 22:53:28 +0100747 struct board_chan __iomem *bc;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700748 /*
749 * verifyChannel returns the channel from the tty struct if it is
750 * valid. This serves as a sanity check.
751 */
Alan Cox191260a2008-04-30 00:54:16 -0700752 ch = verifyChannel(tty);
753 if (ch == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754 return;
755
Alan Coxf2cf8e22005-09-06 15:16:44 -0700756 spin_lock_irqsave(&epca_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757 globalwinon(ch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700758 bc = ch->brdchan;
Alan Coxf2cf8e22005-09-06 15:16:44 -0700759 tail = readw(&bc->tout);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760 /* Have FEP move tout pointer; effectively flushing transmit buffer */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761 fepcmd(ch, STOUT, (unsigned) tail, 0, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700762 memoff(ch);
Alan Coxf2cf8e22005-09-06 15:16:44 -0700763 spin_unlock_irqrestore(&epca_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764 tty_wakeup(tty);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700765}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766
767static void pc_flush_chars(struct tty_struct *tty)
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700768{
769 struct channel *ch;
770 /*
771 * verifyChannel returns the channel from the tty struct if it is
772 * valid. This serves as a sanity check.
773 */
Alan Cox191260a2008-04-30 00:54:16 -0700774 ch = verifyChannel(tty);
775 if (ch != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700776 unsigned long flags;
Alan Coxf2cf8e22005-09-06 15:16:44 -0700777 spin_lock_irqsave(&epca_lock, flags);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700778 /*
779 * If not already set and the transmitter is busy setup an
780 * event to indicate when the transmit empties.
781 */
Alan Cox191260a2008-04-30 00:54:16 -0700782 if ((ch->statusflags & TXBUSY) &&
783 !(ch->statusflags & EMPTYWAIT))
784 setup_empty_event(tty, ch);
Alan Coxf2cf8e22005-09-06 15:16:44 -0700785 spin_unlock_irqrestore(&epca_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786 }
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700787}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700789static int block_til_ready(struct tty_struct *tty,
Alan Cox191260a2008-04-30 00:54:16 -0700790 struct file *filp, struct channel *ch)
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700791{
Alan Cox191260a2008-04-30 00:54:16 -0700792 DECLARE_WAITQUEUE(wait, current);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700793 int retval, do_clocal = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794 unsigned long flags;
795
Alan Coxf2cf8e22005-09-06 15:16:44 -0700796 if (tty_hung_up_p(filp)) {
Alan Cox52d41732008-07-16 21:55:02 +0100797 if (ch->port.flags & ASYNC_HUP_NOTIFY)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798 retval = -EAGAIN;
799 else
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700800 retval = -ERESTARTSYS;
801 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802 }
803
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700804 /*
805 * If the device is in the middle of being closed, then block until
806 * it's done, and then try again.
807 */
Alan Cox52d41732008-07-16 21:55:02 +0100808 if (ch->port.flags & ASYNC_CLOSING) {
809 interruptible_sleep_on(&ch->port.close_wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810
Alan Cox52d41732008-07-16 21:55:02 +0100811 if (ch->port.flags & ASYNC_HUP_NOTIFY)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812 return -EAGAIN;
813 else
814 return -ERESTARTSYS;
815 }
816
Alan Coxf2cf8e22005-09-06 15:16:44 -0700817 if (filp->f_flags & O_NONBLOCK) {
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700818 /*
819 * If non-blocking mode is set, then make the check up front
820 * and then exit.
821 */
Alan Cox52d41732008-07-16 21:55:02 +0100822 ch->port.flags |= ASYNC_NORMAL_ACTIVE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823 return 0;
824 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825 if (tty->termios->c_cflag & CLOCAL)
826 do_clocal = 1;
Alan Coxf2cf8e22005-09-06 15:16:44 -0700827 /* Block waiting for the carrier detect and the line to become free */
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700828
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829 retval = 0;
Alan Cox52d41732008-07-16 21:55:02 +0100830 add_wait_queue(&ch->port.open_wait, &wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831
Alan Coxf2cf8e22005-09-06 15:16:44 -0700832 spin_lock_irqsave(&epca_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700833 /* We dec count so that pc_close will know when to free things */
834 if (!tty_hung_up_p(filp))
Alan Cox52d41732008-07-16 21:55:02 +0100835 ch->port.count--;
836 ch->port.blocked_open++;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700837 while (1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838 set_current_state(TASK_INTERRUPTIBLE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839 if (tty_hung_up_p(filp) ||
Alan Cox52d41732008-07-16 21:55:02 +0100840 !(ch->port.flags & ASYNC_INITIALIZED)) {
841 if (ch->port.flags & ASYNC_HUP_NOTIFY)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700842 retval = -EAGAIN;
843 else
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700844 retval = -ERESTARTSYS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845 break;
846 }
Alan Cox52d41732008-07-16 21:55:02 +0100847 if (!(ch->port.flags & ASYNC_CLOSING) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848 (do_clocal || (ch->imodem & ch->dcd)))
849 break;
Alan Coxf2cf8e22005-09-06 15:16:44 -0700850 if (signal_pending(current)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700851 retval = -ERESTARTSYS;
852 break;
853 }
Alan Coxf2cf8e22005-09-06 15:16:44 -0700854 spin_unlock_irqrestore(&epca_lock, flags);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700855 /*
856 * Allow someone else to be scheduled. We will occasionally go
857 * through this loop until one of the above conditions change.
858 * The below schedule call will allow other processes to enter
859 * and prevent this loop from hogging the cpu.
860 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861 schedule();
Alan Coxf2cf8e22005-09-06 15:16:44 -0700862 spin_lock_irqsave(&epca_lock, flags);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700863 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864
Milind Arun Choudharycc0a8fb2007-05-08 00:30:52 -0700865 __set_current_state(TASK_RUNNING);
Alan Cox52d41732008-07-16 21:55:02 +0100866 remove_wait_queue(&ch->port.open_wait, &wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700867 if (!tty_hung_up_p(filp))
Alan Cox52d41732008-07-16 21:55:02 +0100868 ch->port.count++;
869 ch->port.blocked_open--;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700870
Alan Coxf2cf8e22005-09-06 15:16:44 -0700871 spin_unlock_irqrestore(&epca_lock, flags);
872
Linus Torvalds1da177e2005-04-16 15:20:36 -0700873 if (retval)
874 return retval;
875
Alan Cox52d41732008-07-16 21:55:02 +0100876 ch->port.flags |= ASYNC_NORMAL_ACTIVE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877 return 0;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700878}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700879
Alan Cox191260a2008-04-30 00:54:16 -0700880static int pc_open(struct tty_struct *tty, struct file *filp)
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700881{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700882 struct channel *ch;
883 unsigned long flags;
884 int line, retval, boardnum;
Al Virobc9a5152005-09-15 22:53:28 +0100885 struct board_chan __iomem *bc;
Alan Coxf2cf8e22005-09-06 15:16:44 -0700886 unsigned int head;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700887
888 line = tty->index;
Alan Coxf2cf8e22005-09-06 15:16:44 -0700889 if (line < 0 || line >= nbdevs)
890 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700891
892 ch = &digi_channels[line];
893 boardnum = ch->boardnum;
894
895 /* Check status of board configured in system. */
896
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700897 /*
898 * I check to see if the epca_setup routine detected an user error. It
899 * might be better to put this in pc_init, but for the moment it goes
900 * here.
901 */
Alan Coxf2cf8e22005-09-06 15:16:44 -0700902 if (invalid_lilo_config) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700903 if (setup_error_code & INVALID_BOARD_TYPE)
Alan Coxf2cf8e22005-09-06 15:16:44 -0700904 printk(KERN_ERR "epca: pc_open: Invalid board type specified in kernel options.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905 if (setup_error_code & INVALID_NUM_PORTS)
Alan Coxf2cf8e22005-09-06 15:16:44 -0700906 printk(KERN_ERR "epca: pc_open: Invalid number of ports specified in kernel options.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700907 if (setup_error_code & INVALID_MEM_BASE)
Alan Coxf2cf8e22005-09-06 15:16:44 -0700908 printk(KERN_ERR "epca: pc_open: Invalid board memory address specified in kernel options.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700909 if (setup_error_code & INVALID_PORT_BASE)
Alan Coxf2cf8e22005-09-06 15:16:44 -0700910 printk(KERN_ERR "epca; pc_open: Invalid board port address specified in kernel options.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911 if (setup_error_code & INVALID_BOARD_STATUS)
Alan Coxf2cf8e22005-09-06 15:16:44 -0700912 printk(KERN_ERR "epca: pc_open: Invalid board status specified in kernel options.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700913 if (setup_error_code & INVALID_ALTPIN)
Alan Coxf2cf8e22005-09-06 15:16:44 -0700914 printk(KERN_ERR "epca: pc_open: Invalid board altpin specified in kernel options;\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915 tty->driver_data = NULL; /* Mark this device as 'down' */
Alan Coxf2cf8e22005-09-06 15:16:44 -0700916 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917 }
Alan Coxf2cf8e22005-09-06 15:16:44 -0700918 if (boardnum >= num_cards || boards[boardnum].status == DISABLED) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700919 tty->driver_data = NULL; /* Mark this device as 'down' */
920 return(-ENODEV);
921 }
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700922
Harvey Harrison11fb09b2008-04-30 00:53:52 -0700923 bc = ch->brdchan;
924 if (bc == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700925 tty->driver_data = NULL;
Alan Coxf2cf8e22005-09-06 15:16:44 -0700926 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700927 }
928
Alan Coxf2cf8e22005-09-06 15:16:44 -0700929 spin_lock_irqsave(&epca_lock, flags);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700930 /*
931 * Every time a channel is opened, increment a counter. This is
932 * necessary because we do not wish to flush and shutdown the channel
933 * until the last app holding the channel open, closes it.
934 */
Alan Cox52d41732008-07-16 21:55:02 +0100935 ch->port.count++;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700936 /*
937 * Set a kernel structures pointer to our local channel structure. This
938 * way we can get to it when passed only a tty struct.
939 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940 tty->driver_data = ch;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700941 /*
942 * If this is the first time the channel has been opened, initialize
943 * the tty->termios struct otherwise let pc_close handle it.
944 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945 globalwinon(ch);
946 ch->statusflags = 0;
947
948 /* Save boards current modem status */
Al Virobc9a5152005-09-15 22:53:28 +0100949 ch->imodem = readb(&bc->mstat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700950
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700951 /*
952 * Set receive head and tail ptrs to each other. This indicates no data
953 * available to read.
954 */
Alan Coxf2cf8e22005-09-06 15:16:44 -0700955 head = readw(&bc->rin);
956 writew(head, &bc->rout);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700957
958 /* Set the channels associated tty structure */
Alan Cox52d41732008-07-16 21:55:02 +0100959 ch->port.tty = tty;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700961 /*
962 * The below routine generally sets up parity, baud, flow control
963 * issues, etc.... It effect both control flags and input flags.
964 */
Alan Cox191260a2008-04-30 00:54:16 -0700965 epcaparam(tty, ch);
Alan Cox52d41732008-07-16 21:55:02 +0100966 ch->port.flags |= ASYNC_INITIALIZED;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700967 memoff(ch);
Alan Coxf2cf8e22005-09-06 15:16:44 -0700968 spin_unlock_irqrestore(&epca_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700969
970 retval = block_til_ready(tty, filp, ch);
971 if (retval)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700972 return retval;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700973 /*
974 * Set this again in case a hangup set it to zero while this open() was
975 * waiting for the line...
976 */
Alan Coxf2cf8e22005-09-06 15:16:44 -0700977 spin_lock_irqsave(&epca_lock, flags);
Alan Cox52d41732008-07-16 21:55:02 +0100978 ch->port.tty = tty;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700979 globalwinon(ch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700980 /* Enable Digi Data events */
Alan Coxf2cf8e22005-09-06 15:16:44 -0700981 writeb(1, &bc->idata);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700982 memoff(ch);
Alan Coxf2cf8e22005-09-06 15:16:44 -0700983 spin_unlock_irqrestore(&epca_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700985}
986
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -0700987static int __init epca_module_init(void)
988{
989 return pc_init();
990}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991module_init(epca_module_init);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992
Linus Torvalds1da177e2005-04-16 15:20:36 -0700993static struct pci_driver epca_driver;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994
995static void __exit epca_module_exit(void)
996{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700997 int count, crd;
998 struct board_info *bd;
999 struct channel *ch;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001000
1001 del_timer_sync(&epca_timer);
1002
Alan Cox191260a2008-04-30 00:54:16 -07001003 if (tty_unregister_driver(pc_driver) ||
1004 tty_unregister_driver(pc_info)) {
Alan Coxf2cf8e22005-09-06 15:16:44 -07001005 printk(KERN_WARNING "epca: cleanup_module failed to un-register tty driver\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001006 return;
1007 }
1008 put_tty_driver(pc_driver);
1009 put_tty_driver(pc_info);
1010
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001011 for (crd = 0; crd < num_cards; crd++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001012 bd = &boards[crd];
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001013 if (!bd) { /* sanity check */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001014 printk(KERN_ERR "<Error> - Digi : cleanup_module failed\n");
1015 return;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001016 }
Alan Coxf2cf8e22005-09-06 15:16:44 -07001017 ch = card_ptr[crd];
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001018 for (count = 0; count < bd->numports; count++, ch++) {
Alan Cox52d41732008-07-16 21:55:02 +01001019 if (ch && ch->port.tty)
1020 tty_hangup(ch->port.tty);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001021 }
1022 }
1023 pci_unregister_driver(&epca_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001024}
1025module_exit(epca_module_exit);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001026
Jeff Dikeb68e31d2006-10-02 02:17:18 -07001027static const struct tty_operations pc_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001028 .open = pc_open,
1029 .close = pc_close,
1030 .write = pc_write,
1031 .write_room = pc_write_room,
1032 .flush_buffer = pc_flush_buffer,
1033 .chars_in_buffer = pc_chars_in_buffer,
1034 .flush_chars = pc_flush_chars,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001035 .ioctl = pc_ioctl,
1036 .set_termios = pc_set_termios,
1037 .stop = pc_stop,
1038 .start = pc_start,
1039 .throttle = pc_throttle,
1040 .unthrottle = pc_unthrottle,
1041 .hangup = pc_hangup,
Alan Coxdcbf1282008-07-22 11:18:12 +01001042 .break_ctl = pc_send_break
Linus Torvalds1da177e2005-04-16 15:20:36 -07001043};
1044
Alan Cox191260a2008-04-30 00:54:16 -07001045static int info_open(struct tty_struct *tty, struct file *filp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001046{
1047 return 0;
1048}
1049
1050static struct tty_operations info_ops = {
1051 .open = info_open,
1052 .ioctl = info_ioctl,
1053};
1054
Alan Coxf2cf8e22005-09-06 15:16:44 -07001055static int __init pc_init(void)
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001056{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001057 int crd;
1058 struct board_info *bd;
1059 unsigned char board_id = 0;
Akinobu Mitadabad052006-10-17 00:10:28 -07001060 int err = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001061
Linus Torvalds1da177e2005-04-16 15:20:36 -07001062 int pci_boards_found, pci_count;
1063
1064 pci_count = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001065
1066 pc_driver = alloc_tty_driver(MAX_ALLOC);
1067 if (!pc_driver)
Akinobu Mitadabad052006-10-17 00:10:28 -07001068 goto out1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001069
1070 pc_info = alloc_tty_driver(MAX_ALLOC);
Akinobu Mitadabad052006-10-17 00:10:28 -07001071 if (!pc_info)
1072 goto out2;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001073
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001074 /*
1075 * If epca_setup has not been ran by LILO set num_cards to defaults;
1076 * copy board structure defined by digiConfig into drivers board
1077 * structure. Note : If LILO has ran epca_setup then epca_setup will
1078 * handle defining num_cards as well as copying the data into the board
1079 * structure.
1080 */
1081 if (!liloconfig) {
1082 /* driver has been configured via. epcaconfig */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001083 nbdevs = NBDEVS;
1084 num_cards = NUMCARDS;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001085 memcpy(&boards, &static_boards,
1086 sizeof(struct board_info) * NUMCARDS);
1087 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001088
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001089 /*
1090 * Note : If lilo was used to configure the driver and the ignore
1091 * epcaconfig option was choosen (digiepca=2) then nbdevs and num_cards
1092 * will equal 0 at this point. This is okay; PCI cards will still be
1093 * picked up if detected.
1094 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001096 /*
1097 * Set up interrupt, we will worry about memory allocation in
1098 * post_fep_init.
1099 */
Alan Cox191260a2008-04-30 00:54:16 -07001100 printk(KERN_INFO "DIGI epca driver version %s loaded.\n", VERSION);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001101
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001102 /*
1103 * NOTE : This code assumes that the number of ports found in the
1104 * boards array is correct. This could be wrong if the card in question
1105 * is PCI (And therefore has no ports entry in the boards structure.)
1106 * The rest of the information will be valid for PCI because the
1107 * beginning of pc_init scans for PCI and determines i/o and base
1108 * memory addresses. I am not sure if it is possible to read the number
1109 * of ports supported by the card prior to it being booted (Since that
1110 * is the state it is in when pc_init is run). Because it is not
1111 * possible to query the number of supported ports until after the card
1112 * has booted; we are required to calculate the card_ptrs as the card
1113 * is initialized (Inside post_fep_init). The negative thing about this
1114 * approach is that digiDload's call to GET_INFO will have a bad port
1115 * value. (Since this is called prior to post_fep_init.)
1116 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001117 pci_boards_found = 0;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001118 if (num_cards < MAXBOARDS)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001119 pci_boards_found += init_PCI();
1120 num_cards += pci_boards_found;
1121
Linus Torvalds1da177e2005-04-16 15:20:36 -07001122 pc_driver->owner = THIS_MODULE;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001123 pc_driver->name = "ttyD";
1124 pc_driver->major = DIGI_MAJOR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001125 pc_driver->minor_start = 0;
1126 pc_driver->type = TTY_DRIVER_TYPE_SERIAL;
1127 pc_driver->subtype = SERIAL_TYPE_NORMAL;
1128 pc_driver->init_termios = tty_std_termios;
1129 pc_driver->init_termios.c_iflag = 0;
1130 pc_driver->init_termios.c_oflag = 0;
1131 pc_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
1132 pc_driver->init_termios.c_lflag = 0;
Alan Cox606d0992006-12-08 02:38:45 -08001133 pc_driver->init_termios.c_ispeed = 9600;
1134 pc_driver->init_termios.c_ospeed = 9600;
Alan Coxdcbf1282008-07-22 11:18:12 +01001135 pc_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_HARDWARE_BREAK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001136 tty_set_operations(pc_driver, &pc_ops);
1137
1138 pc_info->owner = THIS_MODULE;
1139 pc_info->name = "digi_ctl";
1140 pc_info->major = DIGIINFOMAJOR;
1141 pc_info->minor_start = 0;
1142 pc_info->type = TTY_DRIVER_TYPE_SERIAL;
1143 pc_info->subtype = SERIAL_TYPE_INFO;
1144 pc_info->init_termios = tty_std_termios;
1145 pc_info->init_termios.c_iflag = 0;
1146 pc_info->init_termios.c_oflag = 0;
1147 pc_info->init_termios.c_lflag = 0;
1148 pc_info->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL;
Alan Cox606d0992006-12-08 02:38:45 -08001149 pc_info->init_termios.c_ispeed = 9600;
1150 pc_info->init_termios.c_ospeed = 9600;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001151 pc_info->flags = TTY_DRIVER_REAL_RAW;
1152 tty_set_operations(pc_info, &info_ops);
1153
1154
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001155 for (crd = 0; crd < num_cards; crd++) {
1156 /*
1157 * This is where the appropriate memory handlers for the
1158 * hardware is set. Everything at runtime blindly jumps through
1159 * these vectors.
1160 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001161
1162 /* defined in epcaconfig.h */
1163 bd = &boards[crd];
1164
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001165 switch (bd->type) {
1166 case PCXEM:
1167 case EISAXEM:
1168 bd->memwinon = pcxem_memwinon;
1169 bd->memwinoff = pcxem_memwinoff;
1170 bd->globalwinon = pcxem_globalwinon;
1171 bd->txwinon = pcxem_txwinon;
1172 bd->rxwinon = pcxem_rxwinon;
1173 bd->memoff = pcxem_memoff;
1174 bd->assertgwinon = dummy_assertgwinon;
1175 bd->assertmemoff = dummy_assertmemoff;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001176 break;
1177
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001178 case PCIXEM:
1179 case PCIXRJ:
1180 case PCIXR:
1181 bd->memwinon = dummy_memwinon;
1182 bd->memwinoff = dummy_memwinoff;
1183 bd->globalwinon = dummy_globalwinon;
1184 bd->txwinon = dummy_txwinon;
1185 bd->rxwinon = dummy_rxwinon;
1186 bd->memoff = dummy_memoff;
1187 bd->assertgwinon = dummy_assertgwinon;
1188 bd->assertmemoff = dummy_assertmemoff;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001189 break;
1190
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001191 case PCXE:
1192 case PCXEVE:
1193 bd->memwinon = pcxe_memwinon;
1194 bd->memwinoff = pcxe_memwinoff;
1195 bd->globalwinon = pcxe_globalwinon;
1196 bd->txwinon = pcxe_txwinon;
1197 bd->rxwinon = pcxe_rxwinon;
1198 bd->memoff = pcxe_memoff;
1199 bd->assertgwinon = dummy_assertgwinon;
1200 bd->assertmemoff = dummy_assertmemoff;
1201 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001202
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001203 case PCXI:
1204 case PC64XE:
1205 bd->memwinon = pcxi_memwinon;
1206 bd->memwinoff = pcxi_memwinoff;
1207 bd->globalwinon = pcxi_globalwinon;
1208 bd->txwinon = pcxi_txwinon;
1209 bd->rxwinon = pcxi_rxwinon;
1210 bd->memoff = pcxi_memoff;
1211 bd->assertgwinon = pcxi_assertgwinon;
1212 bd->assertmemoff = pcxi_assertmemoff;
1213 break;
1214
1215 default:
1216 break;
1217 }
1218
1219 /*
1220 * Some cards need a memory segment to be defined for use in
1221 * transmit and receive windowing operations. These boards are
1222 * listed in the below switch. In the case of the XI the amount
1223 * of memory on the board is variable so the memory_seg is also
1224 * variable. This code determines what they segment should be.
1225 */
1226 switch (bd->type) {
1227 case PCXE:
1228 case PCXEVE:
1229 case PC64XE:
1230 bd->memory_seg = 0xf000;
1231 break;
1232
1233 case PCXI:
1234 board_id = inb((int)bd->port);
1235 if ((board_id & 0x1) == 0x1) {
1236 /* it's an XI card */
1237 /* Is it a 64K board */
1238 if ((board_id & 0x30) == 0)
1239 bd->memory_seg = 0xf000;
1240
1241 /* Is it a 128K board */
1242 if ((board_id & 0x30) == 0x10)
1243 bd->memory_seg = 0xe000;
1244
1245 /* Is is a 256K board */
1246 if ((board_id & 0x30) == 0x20)
1247 bd->memory_seg = 0xc000;
1248
1249 /* Is it a 512K board */
1250 if ((board_id & 0x30) == 0x30)
1251 bd->memory_seg = 0x8000;
1252 } else
Alan Cox191260a2008-04-30 00:54:16 -07001253 printk(KERN_ERR "epca: Board at 0x%x doesn't appear to be an XI\n", (int)bd->port);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001254 break;
1255 }
1256 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001257
Akinobu Mitadabad052006-10-17 00:10:28 -07001258 err = tty_register_driver(pc_driver);
1259 if (err) {
1260 printk(KERN_ERR "Couldn't register Digi PC/ driver");
1261 goto out3;
1262 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001263
Akinobu Mitadabad052006-10-17 00:10:28 -07001264 err = tty_register_driver(pc_info);
1265 if (err) {
1266 printk(KERN_ERR "Couldn't register Digi PC/ info ");
1267 goto out4;
1268 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001269
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001270 /* Start up the poller to check for events on all enabled boards */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001271 init_timer(&epca_timer);
1272 epca_timer.function = epcapoll;
1273 mod_timer(&epca_timer, jiffies + HZ/25);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001274 return 0;
1275
Akinobu Mitadabad052006-10-17 00:10:28 -07001276out4:
1277 tty_unregister_driver(pc_driver);
1278out3:
1279 put_tty_driver(pc_info);
1280out2:
1281 put_tty_driver(pc_driver);
1282out1:
1283 return err;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001284}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001285
1286static void post_fep_init(unsigned int crd)
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001287{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001288 int i;
Al Virobc9a5152005-09-15 22:53:28 +01001289 void __iomem *memaddr;
1290 struct global_data __iomem *gd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001291 struct board_info *bd;
Al Virobc9a5152005-09-15 22:53:28 +01001292 struct board_chan __iomem *bc;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001293 struct channel *ch;
1294 int shrinkmem = 0, lowwater;
1295
1296 /*
1297 * This call is made by the user via. the ioctl call DIGI_INIT. It is
1298 * responsible for setting up all the card specific stuff.
1299 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001300 bd = &boards[crd];
1301
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001302 /*
1303 * If this is a PCI board, get the port info. Remember PCI cards do not
1304 * have entries into the epcaconfig.h file, so we can't get the number
1305 * of ports from it. Unfortunetly, this means that anyone doing a
1306 * DIGI_GETINFO before the board has booted will get an invalid number
1307 * of ports returned (It should return 0). Calls to DIGI_GETINFO after
1308 * DIGI_INIT has been called will return the proper values.
1309 */
Alan Coxf2cf8e22005-09-06 15:16:44 -07001310 if (bd->type >= PCIXEM) { /* Begin get PCI number of ports */
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001311 /*
1312 * Below we use XEMPORTS as a memory offset regardless of which
1313 * PCI card it is. This is because all of the supported PCI
1314 * cards have the same memory offset for the channel data. This
1315 * will have to be changed if we ever develop a PCI/XE card.
1316 * NOTE : The FEP manual states that the port offset is 0xC22
1317 * as opposed to 0xC02. This is only true for PC/XE, and PC/XI
1318 * cards; not for the XEM, or CX series. On the PCI cards the
1319 * number of ports is determined by reading a ID PROM located
1320 * in the box attached to the card. The card can then determine
1321 * the index the id to determine the number of ports available.
1322 * (FYI - The id should be located at 0x1ac (And may use up to
1323 * 4 bytes if the box in question is a XEM or CX)).
1324 */
Alan Coxf2cf8e22005-09-06 15:16:44 -07001325 /* PCI cards are already remapped at this point ISA are not */
1326 bd->numports = readw(bd->re_map_membase + XEMPORTS);
Alan Cox191260a2008-04-30 00:54:16 -07001327 epcaassert(bd->numports <= 64, "PCI returned a invalid number of ports");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001328 nbdevs += (bd->numports);
Alan Coxf2cf8e22005-09-06 15:16:44 -07001329 } else {
1330 /* Fix up the mappings for ISA/EISA etc */
1331 /* FIXME: 64K - can we be smarter ? */
Alan Cox191260a2008-04-30 00:54:16 -07001332 bd->re_map_membase = ioremap_nocache(bd->membase, 0x10000);
Alan Coxf2cf8e22005-09-06 15:16:44 -07001333 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001334
1335 if (crd != 0)
1336 card_ptr[crd] = card_ptr[crd-1] + boards[crd-1].numports;
1337 else
1338 card_ptr[crd] = &digi_channels[crd]; /* <- For card 0 only */
1339
1340 ch = card_ptr[crd];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001341 epcaassert(ch <= &digi_channels[nbdevs - 1], "ch out of range");
1342
Alan Coxf2cf8e22005-09-06 15:16:44 -07001343 memaddr = bd->re_map_membase;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001344
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001345 /*
1346 * The below assignment will set bc to point at the BEGINING of the
1347 * cards channel structures. For 1 card there will be between 8 and 64
1348 * of these structures.
1349 */
Al Virobc9a5152005-09-15 22:53:28 +01001350 bc = memaddr + CHANSTRUCT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001351
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001352 /*
1353 * The below assignment will set gd to point at the BEGINING of global
1354 * memory address 0xc00. The first data in that global memory actually
1355 * starts at address 0xc1a. The command in pointer begins at 0xd10.
1356 */
Al Virobc9a5152005-09-15 22:53:28 +01001357 gd = memaddr + GLOBAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001358
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001359 /*
1360 * XEPORTS (address 0xc22) points at the number of channels the card
1361 * supports. (For 64XE, XI, XEM, and XR use 0xc02)
1362 */
Alan Cox191260a2008-04-30 00:54:16 -07001363 if ((bd->type == PCXEVE || bd->type == PCXE) &&
1364 (readw(memaddr + XEPORTS) < 3))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001365 shrinkmem = 1;
1366 if (bd->type < PCIXEM)
1367 if (!request_region((int)bd->port, 4, board_desc[bd->type]))
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001368 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001369 memwinon(bd, 0);
1370
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001371 /*
1372 * Remember ch is the main drivers channels structure, while bc is the
1373 * cards channel structure.
1374 */
1375 for (i = 0; i < bd->numports; i++, ch++, bc++) {
Alan Coxf2cf8e22005-09-06 15:16:44 -07001376 unsigned long flags;
Al Virobc9a5152005-09-15 22:53:28 +01001377 u16 tseg, rseg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001378
Alan Cox9ae7b082008-10-13 10:32:09 +01001379 tty_port_init(&ch->port);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001380 ch->brdchan = bc;
1381 ch->mailbox = gd;
David Howellsc4028952006-11-22 14:57:56 +00001382 INIT_WORK(&ch->tqueue, do_softint);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001383 ch->board = &boards[crd];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001384
Alan Coxf2cf8e22005-09-06 15:16:44 -07001385 spin_lock_irqsave(&epca_lock, flags);
1386 switch (bd->type) {
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001387 /*
1388 * Since some of the boards use different bitmaps for
1389 * their control signals we cannot hard code these
1390 * values and retain portability. We virtualize this
1391 * data here.
1392 */
1393 case EISAXEM:
1394 case PCXEM:
1395 case PCIXEM:
1396 case PCIXRJ:
1397 case PCIXR:
1398 ch->m_rts = 0x02;
1399 ch->m_dcd = 0x80;
1400 ch->m_dsr = 0x20;
1401 ch->m_cts = 0x10;
1402 ch->m_ri = 0x40;
1403 ch->m_dtr = 0x01;
1404 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001405
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001406 case PCXE:
1407 case PCXEVE:
1408 case PCXI:
1409 case PC64XE:
1410 ch->m_rts = 0x02;
1411 ch->m_dcd = 0x08;
1412 ch->m_dsr = 0x10;
1413 ch->m_cts = 0x20;
1414 ch->m_ri = 0x40;
1415 ch->m_dtr = 0x80;
1416 break;
1417 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001418
Alan Coxf2cf8e22005-09-06 15:16:44 -07001419 if (boards[crd].altpin) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001420 ch->dsr = ch->m_dcd;
1421 ch->dcd = ch->m_dsr;
1422 ch->digiext.digi_flags |= DIGI_ALTPIN;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001423 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001424 ch->dcd = ch->m_dcd;
1425 ch->dsr = ch->m_dsr;
1426 }
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001427
Linus Torvalds1da177e2005-04-16 15:20:36 -07001428 ch->boardnum = crd;
1429 ch->channelnum = i;
1430 ch->magic = EPCA_MAGIC;
Alan Cox52d41732008-07-16 21:55:02 +01001431 ch->port.tty = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001432
Alan Coxf2cf8e22005-09-06 15:16:44 -07001433 if (shrinkmem) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001434 fepcmd(ch, SETBUFFER, 32, 0, 0, 0);
1435 shrinkmem = 0;
1436 }
1437
Al Virobc9a5152005-09-15 22:53:28 +01001438 tseg = readw(&bc->tseg);
1439 rseg = readw(&bc->rseg);
1440
Alan Coxf2cf8e22005-09-06 15:16:44 -07001441 switch (bd->type) {
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001442 case PCIXEM:
1443 case PCIXRJ:
1444 case PCIXR:
1445 /* Cover all the 2MEG cards */
1446 ch->txptr = memaddr + ((tseg << 4) & 0x1fffff);
1447 ch->rxptr = memaddr + ((rseg << 4) & 0x1fffff);
1448 ch->txwin = FEPWIN | (tseg >> 11);
1449 ch->rxwin = FEPWIN | (rseg >> 11);
1450 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001451
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001452 case PCXEM:
1453 case EISAXEM:
1454 /* Cover all the 32K windowed cards */
1455 /* Mask equal to window size - 1 */
1456 ch->txptr = memaddr + ((tseg << 4) & 0x7fff);
1457 ch->rxptr = memaddr + ((rseg << 4) & 0x7fff);
1458 ch->txwin = FEPWIN | (tseg >> 11);
1459 ch->rxwin = FEPWIN | (rseg >> 11);
1460 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001461
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001462 case PCXEVE:
1463 case PCXE:
Alan Cox191260a2008-04-30 00:54:16 -07001464 ch->txptr = memaddr + (((tseg - bd->memory_seg) << 4)
1465 & 0x1fff);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001466 ch->txwin = FEPWIN | ((tseg - bd->memory_seg) >> 9);
Alan Cox191260a2008-04-30 00:54:16 -07001467 ch->rxptr = memaddr + (((rseg - bd->memory_seg) << 4)
1468 & 0x1fff);
1469 ch->rxwin = FEPWIN | ((rseg - bd->memory_seg) >> 9);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001470 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001471
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001472 case PCXI:
1473 case PC64XE:
1474 ch->txptr = memaddr + ((tseg - bd->memory_seg) << 4);
1475 ch->rxptr = memaddr + ((rseg - bd->memory_seg) << 4);
1476 ch->txwin = ch->rxwin = 0;
1477 break;
1478 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001479
1480 ch->txbufhead = 0;
Al Virobc9a5152005-09-15 22:53:28 +01001481 ch->txbufsize = readw(&bc->tmax) + 1;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001482
Linus Torvalds1da177e2005-04-16 15:20:36 -07001483 ch->rxbufhead = 0;
Al Virobc9a5152005-09-15 22:53:28 +01001484 ch->rxbufsize = readw(&bc->rmax) + 1;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001485
Linus Torvalds1da177e2005-04-16 15:20:36 -07001486 lowwater = ch->txbufsize >= 2000 ? 1024 : (ch->txbufsize / 2);
1487
1488 /* Set transmitter low water mark */
1489 fepcmd(ch, STXLWATER, lowwater, 0, 10, 0);
1490
1491 /* Set receiver low water mark */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001492 fepcmd(ch, SRXLWATER, (ch->rxbufsize / 4), 0, 10, 0);
1493
1494 /* Set receiver high water mark */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001495 fepcmd(ch, SRXHWATER, (3 * ch->rxbufsize / 4), 0, 10, 0);
1496
Alan Coxf2cf8e22005-09-06 15:16:44 -07001497 writew(100, &bc->edelay);
1498 writeb(1, &bc->idata);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001499
Alan Coxf2cf8e22005-09-06 15:16:44 -07001500 ch->startc = readb(&bc->startc);
1501 ch->stopc = readb(&bc->stopc);
1502 ch->startca = readb(&bc->startca);
1503 ch->stopca = readb(&bc->stopca);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001504
Linus Torvalds1da177e2005-04-16 15:20:36 -07001505 ch->fepcflag = 0;
1506 ch->fepiflag = 0;
1507 ch->fepoflag = 0;
1508 ch->fepstartc = 0;
1509 ch->fepstopc = 0;
1510 ch->fepstartca = 0;
1511 ch->fepstopca = 0;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001512
Linus Torvalds1da177e2005-04-16 15:20:36 -07001513 ch->close_delay = 50;
Alan Coxf2cf8e22005-09-06 15:16:44 -07001514
1515 spin_unlock_irqrestore(&epca_lock, flags);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001516 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001517
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001518 printk(KERN_INFO
Alan Cox191260a2008-04-30 00:54:16 -07001519 "Digi PC/Xx Driver V%s: %s I/O = 0x%lx Mem = 0x%lx Ports = %d\n",
1520 VERSION, board_desc[bd->type], (long)bd->port,
1521 (long)bd->membase, bd->numports);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001522 memwinoff(bd, 0);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001523}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001524
1525static void epcapoll(unsigned long ignored)
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001526{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001527 unsigned long flags;
1528 int crd;
Alan Cox191260a2008-04-30 00:54:16 -07001529 unsigned int head, tail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001530 struct channel *ch;
1531 struct board_info *bd;
1532
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001533 /*
1534 * This routine is called upon every timer interrupt. Even though the
1535 * Digi series cards are capable of generating interrupts this method
1536 * of non-looping polling is more efficient. This routine checks for
1537 * card generated events (Such as receive data, are transmit buffer
1538 * empty) and acts on those events.
1539 */
1540 for (crd = 0; crd < num_cards; crd++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001541 bd = &boards[crd];
1542 ch = card_ptr[crd];
1543
1544 if ((bd->status == DISABLED) || digi_poller_inhibited)
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001545 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001546
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001547 /*
1548 * assertmemoff is not needed here; indeed it is an empty
1549 * subroutine. It is being kept because future boards may need
1550 * this as well as some legacy boards.
1551 */
Alan Coxf2cf8e22005-09-06 15:16:44 -07001552 spin_lock_irqsave(&epca_lock, flags);
1553
Linus Torvalds1da177e2005-04-16 15:20:36 -07001554 assertmemoff(ch);
1555
1556 globalwinon(ch);
1557
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001558 /*
1559 * In this case head and tail actually refer to the event queue
1560 * not the transmit or receive queue.
1561 */
Alan Coxf2cf8e22005-09-06 15:16:44 -07001562 head = readw(&ch->mailbox->ein);
1563 tail = readw(&ch->mailbox->eout);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001564
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001565 /* If head isn't equal to tail we have an event */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001566 if (head != tail)
1567 doevent(crd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001568 memoff(ch);
1569
Alan Coxf2cf8e22005-09-06 15:16:44 -07001570 spin_unlock_irqrestore(&epca_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001571 } /* End for each card */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001572 mod_timer(&epca_timer, jiffies + (HZ / 25));
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001573}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001574
1575static void doevent(int crd)
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001576{
Al Virobc9a5152005-09-15 22:53:28 +01001577 void __iomem *eventbuf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001578 struct channel *ch, *chan0;
1579 static struct tty_struct *tty;
Alan Coxf2cf8e22005-09-06 15:16:44 -07001580 struct board_info *bd;
Al Virobc9a5152005-09-15 22:53:28 +01001581 struct board_chan __iomem *bc;
Alan Coxf2cf8e22005-09-06 15:16:44 -07001582 unsigned int tail, head;
1583 int event, channel;
1584 int mstat, lstat;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001585
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001586 /*
1587 * This subroutine is called by epcapoll when an event is detected
1588 * in the event queue. This routine responds to those events.
1589 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001590 bd = &boards[crd];
1591
1592 chan0 = card_ptr[crd];
1593 epcaassert(chan0 <= &digi_channels[nbdevs - 1], "ch out of range");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001594 assertgwinon(chan0);
Alan Cox191260a2008-04-30 00:54:16 -07001595 while ((tail = readw(&chan0->mailbox->eout)) !=
1596 (head = readw(&chan0->mailbox->ein))) {
1597 /* Begin while something in event queue */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001598 assertgwinon(chan0);
Alan Coxf2cf8e22005-09-06 15:16:44 -07001599 eventbuf = bd->re_map_membase + tail + ISTART;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001600 /* Get the channel the event occurred on */
Alan Coxf2cf8e22005-09-06 15:16:44 -07001601 channel = readb(eventbuf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001602 /* Get the actual event code that occurred */
Alan Coxf2cf8e22005-09-06 15:16:44 -07001603 event = readb(eventbuf + 1);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001604 /*
1605 * The two assignments below get the current modem status
1606 * (mstat) and the previous modem status (lstat). These are
1607 * useful becuase an event could signal a change in modem
1608 * signals itself.
1609 */
Alan Coxf2cf8e22005-09-06 15:16:44 -07001610 mstat = readb(eventbuf + 2);
1611 lstat = readb(eventbuf + 3);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001612
1613 ch = chan0 + channel;
Alan Coxf2cf8e22005-09-06 15:16:44 -07001614 if ((unsigned)channel >= bd->numports || !ch) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001615 if (channel >= bd->numports)
1616 ch = chan0;
1617 bc = ch->brdchan;
1618 goto next;
1619 }
1620
Alan Cox191260a2008-04-30 00:54:16 -07001621 bc = ch->brdchan;
1622 if (bc == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001623 goto next;
1624
Alan Coxf2cf8e22005-09-06 15:16:44 -07001625 if (event & DATA_IND) { /* Begin DATA_IND */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001626 receive_data(ch);
1627 assertgwinon(ch);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001628 } /* End DATA_IND */
1629 /* else *//* Fix for DCD transition missed bug */
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001630 if (event & MODEMCHG_IND) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001631 /* A modem signal change has been indicated */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001632 ch->imodem = mstat;
Alan Cox52d41732008-07-16 21:55:02 +01001633 if (ch->port.flags & ASYNC_CHECK_CD) {
Alan Cox191260a2008-04-30 00:54:16 -07001634 /* We are now receiving dcd */
1635 if (mstat & ch->dcd)
Alan Cox52d41732008-07-16 21:55:02 +01001636 wake_up_interruptible(&ch->port.open_wait);
Alan Cox191260a2008-04-30 00:54:16 -07001637 else /* No dcd; hangup */
1638 pc_sched_event(ch, EPCA_EVENT_HANGUP);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001639 }
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001640 }
Alan Cox52d41732008-07-16 21:55:02 +01001641 tty = ch->port.tty;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001642 if (tty) {
1643 if (event & BREAK_IND) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001644 /* A break has been indicated */
Alan Cox33f0f882006-01-09 20:54:13 -08001645 tty_insert_flip_char(tty, 0, TTY_BREAK);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001646 tty_schedule_flip(tty);
1647 } else if (event & LOWTX_IND) {
1648 if (ch->statusflags & LOWWAIT) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001649 ch->statusflags &= ~LOWWAIT;
1650 tty_wakeup(tty);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001651 }
1652 } else if (event & EMPTYTX_IND) {
Alan Cox191260a2008-04-30 00:54:16 -07001653 /* This event is generated by
1654 setup_empty_event */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001655 ch->statusflags &= ~TXBUSY;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001656 if (ch->statusflags & EMPTYWAIT) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001657 ch->statusflags &= ~EMPTYWAIT;
1658 tty_wakeup(tty);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001659 }
1660 }
1661 }
Alan Cox191260a2008-04-30 00:54:16 -07001662next:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001663 globalwinon(ch);
Alan Coxf2cf8e22005-09-06 15:16:44 -07001664 BUG_ON(!bc);
1665 writew(1, &bc->idata);
1666 writew((tail + 4) & (IMAX - ISTART - 4), &chan0->mailbox->eout);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001667 globalwinon(chan0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001668 } /* End while something in event queue */
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001669}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001670
1671static void fepcmd(struct channel *ch, int cmd, int word_or_byte,
Alan Cox191260a2008-04-30 00:54:16 -07001672 int byte2, int ncmds, int bytecmd)
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001673{
Al Virobc9a5152005-09-15 22:53:28 +01001674 unchar __iomem *memaddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001675 unsigned int head, cmdTail, cmdStart, cmdMax;
1676 long count;
1677 int n;
1678
1679 /* This is the routine in which commands may be passed to the card. */
1680
1681 if (ch->board->status == DISABLED)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001682 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001683 assertgwinon(ch);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001684 /* Remember head (As well as max) is just an offset not a base addr */
Alan Coxf2cf8e22005-09-06 15:16:44 -07001685 head = readw(&ch->mailbox->cin);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001686 /* cmdStart is a base address */
Alan Coxf2cf8e22005-09-06 15:16:44 -07001687 cmdStart = readw(&ch->mailbox->cstart);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001688 /*
1689 * We do the addition below because we do not want a max pointer
1690 * relative to cmdStart. We want a max pointer that points at the
1691 * physical end of the command queue.
1692 */
Alan Coxf2cf8e22005-09-06 15:16:44 -07001693 cmdMax = (cmdStart + 4 + readw(&ch->mailbox->cmax));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001694 memaddr = ch->board->re_map_membase;
1695
Alan Coxf2cf8e22005-09-06 15:16:44 -07001696 if (head >= (cmdMax - cmdStart) || (head & 03)) {
Alan Cox191260a2008-04-30 00:54:16 -07001697 printk(KERN_ERR "line %d: Out of range, cmd = %x, head = %x\n",
1698 __LINE__, cmd, head);
1699 printk(KERN_ERR "line %d: Out of range, cmdMax = %x, cmdStart = %x\n",
1700 __LINE__, cmdMax, cmdStart);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001701 return;
1702 }
Alan Coxf2cf8e22005-09-06 15:16:44 -07001703 if (bytecmd) {
1704 writeb(cmd, memaddr + head + cmdStart + 0);
1705 writeb(ch->channelnum, memaddr + head + cmdStart + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001706 /* Below word_or_byte is bits to set */
Alan Coxf2cf8e22005-09-06 15:16:44 -07001707 writeb(word_or_byte, memaddr + head + cmdStart + 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001708 /* Below byte2 is bits to reset */
Alan Coxf2cf8e22005-09-06 15:16:44 -07001709 writeb(byte2, memaddr + head + cmdStart + 3);
1710 } else {
1711 writeb(cmd, memaddr + head + cmdStart + 0);
1712 writeb(ch->channelnum, memaddr + head + cmdStart + 1);
1713 writeb(word_or_byte, memaddr + head + cmdStart + 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001714 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001715 head = (head + 4) & (cmdMax - cmdStart - 4);
Alan Coxf2cf8e22005-09-06 15:16:44 -07001716 writew(head, &ch->mailbox->cin);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001717 count = FEPTIMEOUT;
1718
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001719 for (;;) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001720 count--;
Alan Coxf2cf8e22005-09-06 15:16:44 -07001721 if (count == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001722 printk(KERN_ERR "<Error> - Fep not responding in fepcmd()\n");
1723 return;
1724 }
Alan Coxf2cf8e22005-09-06 15:16:44 -07001725 head = readw(&ch->mailbox->cin);
1726 cmdTail = readw(&ch->mailbox->cout);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001727 n = (head - cmdTail) & (cmdMax - cmdStart - 4);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001728 /*
1729 * Basically this will break when the FEP acknowledges the
1730 * command by incrementing cmdTail (Making it equal to head).
1731 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001732 if (n <= ncmds * (sizeof(short) * 4))
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001733 break;
1734 }
1735}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001736
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001737/*
1738 * Digi products use fields in their channels structures that are very similar
1739 * to the c_cflag and c_iflag fields typically found in UNIX termios
1740 * structures. The below three routines allow mappings between these hardware
1741 * "flags" and their respective Linux flags.
1742 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001743static unsigned termios2digi_h(struct channel *ch, unsigned cflag)
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001744{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001745 unsigned res = 0;
1746
Alan Coxf2cf8e22005-09-06 15:16:44 -07001747 if (cflag & CRTSCTS) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001748 ch->digiext.digi_flags |= (RTSPACE | CTSPACE);
1749 res |= ((ch->m_cts) | (ch->m_rts));
1750 }
1751
1752 if (ch->digiext.digi_flags & RTSPACE)
1753 res |= ch->m_rts;
1754
1755 if (ch->digiext.digi_flags & DTRPACE)
1756 res |= ch->m_dtr;
1757
1758 if (ch->digiext.digi_flags & CTSPACE)
1759 res |= ch->m_cts;
1760
1761 if (ch->digiext.digi_flags & DSRPACE)
1762 res |= ch->dsr;
1763
1764 if (ch->digiext.digi_flags & DCDPACE)
1765 res |= ch->dcd;
1766
1767 if (res & (ch->m_rts))
1768 ch->digiext.digi_flags |= RTSPACE;
1769
1770 if (res & (ch->m_cts))
1771 ch->digiext.digi_flags |= CTSPACE;
1772
1773 return res;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001774}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001775
Linus Torvalds1da177e2005-04-16 15:20:36 -07001776static unsigned termios2digi_i(struct channel *ch, unsigned iflag)
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001777{
1778 unsigned res = iflag & (IGNBRK | BRKINT | IGNPAR | PARMRK |
Alan Cox191260a2008-04-30 00:54:16 -07001779 INPCK | ISTRIP | IXON | IXANY | IXOFF);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001780 if (ch->digiext.digi_flags & DIGI_AIXON)
1781 res |= IAIXON;
1782 return res;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001783}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001784
1785static unsigned termios2digi_c(struct channel *ch, unsigned cflag)
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001786{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001787 unsigned res = 0;
Alan Coxf2cf8e22005-09-06 15:16:44 -07001788 if (cflag & CBAUDEX) {
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001789 ch->digiext.digi_flags |= DIGI_FAST;
1790 /*
1791 * HUPCL bit is used by FEP to indicate fast baud table is to
1792 * be used.
1793 */
1794 res |= FEP_HUPCL;
1795 } else
1796 ch->digiext.digi_flags &= ~DIGI_FAST;
1797 /*
1798 * CBAUD has bit position 0x1000 set these days to indicate Linux
1799 * baud rate remap. Digi hardware can't handle the bit assignment.
1800 * (We use a different bit assignment for high speed.). Clear this
1801 * bit out.
1802 */
1803 res |= cflag & ((CBAUD ^ CBAUDEX) | PARODD | PARENB | CSTOPB | CSIZE);
1804 /*
1805 * This gets a little confusing. The Digi cards have their own
Joe Perches8dfba4d2008-02-03 17:11:42 +02001806 * representation of c_cflags controlling baud rate. For the most part
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001807 * this is identical to the Linux implementation. However; Digi
1808 * supports one rate (76800) that Linux doesn't. This means that the
1809 * c_cflag entry that would normally mean 76800 for Digi actually means
1810 * 115200 under Linux. Without the below mapping, a stty 115200 would
1811 * only drive the board at 76800. Since the rate 230400 is also found
1812 * after 76800, the same problem afflicts us when we choose a rate of
1813 * 230400. Without the below modificiation stty 230400 would actually
1814 * give us 115200.
1815 *
1816 * There are two additional differences. The Linux value for CLOCAL
1817 * (0x800; 0004000) has no meaning to the Digi hardware. Also in later
1818 * releases of Linux; the CBAUD define has CBAUDEX (0x1000; 0010000)
1819 * ored into it (CBAUD = 0x100f as opposed to 0xf). CBAUDEX should be
1820 * checked for a screened out prior to termios2digi_c returning. Since
1821 * CLOCAL isn't used by the board this can be ignored as long as the
1822 * returned value is used only by Digi hardware.
1823 */
1824 if (cflag & CBAUDEX) {
1825 /*
1826 * The below code is trying to guarantee that only baud rates
1827 * 115200 and 230400 are remapped. We use exclusive or because
1828 * the various baud rates share common bit positions and
1829 * therefore can't be tested for easily.
1830 */
1831 if ((!((cflag & 0x7) ^ (B115200 & ~CBAUDEX))) ||
Linus Torvalds1da177e2005-04-16 15:20:36 -07001832 (!((cflag & 0x7) ^ (B230400 & ~CBAUDEX))))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001833 res += 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001834 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001835 return res;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001836}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001837
Alan Coxf2cf8e22005-09-06 15:16:44 -07001838/* Caller must hold the locks */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001839static void epcaparam(struct tty_struct *tty, struct channel *ch)
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001840{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001841 unsigned int cmdHead;
Alan Cox606d0992006-12-08 02:38:45 -08001842 struct ktermios *ts;
Al Virobc9a5152005-09-15 22:53:28 +01001843 struct board_chan __iomem *bc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001844 unsigned mval, hflow, cflag, iflag;
1845
1846 bc = ch->brdchan;
Harvey Harrison11fb09b2008-04-30 00:53:52 -07001847 epcaassert(bc != NULL, "bc out of range");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001848
1849 assertgwinon(ch);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001850 ts = tty->termios;
Alan Coxf2cf8e22005-09-06 15:16:44 -07001851 if ((ts->c_cflag & CBAUD) == 0) { /* Begin CBAUD detected */
1852 cmdHead = readw(&bc->rin);
Al Virobc9a5152005-09-15 22:53:28 +01001853 writew(cmdHead, &bc->rout);
Alan Coxf2cf8e22005-09-06 15:16:44 -07001854 cmdHead = readw(&bc->tin);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001855 /* Changing baud in mid-stream transmission can be wonderful */
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001856 /*
1857 * Flush current transmit buffer by setting cmdTail pointer
1858 * (tout) to cmdHead pointer (tin). Hopefully the transmit
1859 * buffer is empty.
1860 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001861 fepcmd(ch, STOUT, (unsigned) cmdHead, 0, 0, 0);
1862 mval = 0;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001863 } else { /* Begin CBAUD not detected */
1864 /*
1865 * c_cflags have changed but that change had nothing to do with
1866 * BAUD. Propagate the change to the card.
1867 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001868 cflag = termios2digi_c(ch, ts->c_cflag);
Alan Coxf2cf8e22005-09-06 15:16:44 -07001869 if (cflag != ch->fepcflag) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001870 ch->fepcflag = cflag;
1871 /* Set baud rate, char size, stop bits, parity */
1872 fepcmd(ch, SETCTRLFLAGS, (unsigned) cflag, 0, 0, 0);
1873 }
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001874 /*
1875 * If the user has not forced CLOCAL and if the device is not a
1876 * CALLOUT device (Which is always CLOCAL) we set flags such
1877 * that the driver will wait on carrier detect.
1878 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001879 if (ts->c_cflag & CLOCAL)
Alan Cox52d41732008-07-16 21:55:02 +01001880 ch->port.flags &= ~ASYNC_CHECK_CD;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001881 else
Alan Cox52d41732008-07-16 21:55:02 +01001882 ch->port.flags |= ASYNC_CHECK_CD;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001883 mval = ch->m_dtr | ch->m_rts;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001884 } /* End CBAUD not detected */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001885 iflag = termios2digi_i(ch, ts->c_iflag);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001886 /* Check input mode flags */
Alan Coxf2cf8e22005-09-06 15:16:44 -07001887 if (iflag != ch->fepiflag) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001888 ch->fepiflag = iflag;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001889 /*
1890 * Command sets channels iflag structure on the board. Such
1891 * things as input soft flow control, handling of parity
1892 * errors, and break handling are all set here.
Alan Cox191260a2008-04-30 00:54:16 -07001893 *
1894 * break handling, parity handling, input stripping,
1895 * flow control chars
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001896 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001897 fepcmd(ch, SETIFLAGS, (unsigned int) ch->fepiflag, 0, 0, 0);
1898 }
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001899 /*
1900 * Set the board mint value for this channel. This will cause hardware
1901 * events to be generated each time the DCD signal (Described in mint)
1902 * changes.
1903 */
Alan Coxf2cf8e22005-09-06 15:16:44 -07001904 writeb(ch->dcd, &bc->mint);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001905 if ((ts->c_cflag & CLOCAL) || (ch->digiext.digi_flags & DIGI_FORCEDCD))
1906 if (ch->digiext.digi_flags & DIGI_FORCEDCD)
Alan Coxf2cf8e22005-09-06 15:16:44 -07001907 writeb(0, &bc->mint);
1908 ch->imodem = readb(&bc->mstat);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001909 hflow = termios2digi_h(ch, ts->c_cflag);
Alan Coxf2cf8e22005-09-06 15:16:44 -07001910 if (hflow != ch->hflow) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001911 ch->hflow = hflow;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001912 /*
1913 * Hard flow control has been selected but the board is not
1914 * using it. Activate hard flow control now.
1915 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001916 fepcmd(ch, SETHFLOW, hflow, 0xff, 0, 1);
1917 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001918 mval ^= ch->modemfake & (mval ^ ch->modem);
1919
Alan Coxf2cf8e22005-09-06 15:16:44 -07001920 if (ch->omodem ^ mval) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001921 ch->omodem = mval;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001922 /*
1923 * The below command sets the DTR and RTS mstat structure. If
1924 * hard flow control is NOT active these changes will drive the
1925 * output of the actual DTR and RTS lines. If hard flow control
1926 * is active, the changes will be saved in the mstat structure
1927 * and only asserted when hard flow control is turned off.
1928 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001929
1930 /* First reset DTR & RTS; then set them */
1931 fepcmd(ch, SETMODEM, 0, ((ch->m_dtr)|(ch->m_rts)), 0, 1);
1932 fepcmd(ch, SETMODEM, mval, 0, 0, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001933 }
Alan Coxf2cf8e22005-09-06 15:16:44 -07001934 if (ch->startc != ch->fepstartc || ch->stopc != ch->fepstopc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001935 ch->fepstartc = ch->startc;
1936 ch->fepstopc = ch->stopc;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001937 /*
1938 * The XON / XOFF characters have changed; propagate these
1939 * changes to the card.
1940 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001941 fepcmd(ch, SONOFFC, ch->fepstartc, ch->fepstopc, 0, 1);
1942 }
Alan Coxf2cf8e22005-09-06 15:16:44 -07001943 if (ch->startca != ch->fepstartca || ch->stopca != ch->fepstopca) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001944 ch->fepstartca = ch->startca;
1945 ch->fepstopca = ch->stopca;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001946 /*
1947 * Similar to the above, this time the auxilarly XON / XOFF
1948 * characters have changed; propagate these changes to the card.
1949 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001950 fepcmd(ch, SAUXONOFFC, ch->fepstartca, ch->fepstopca, 0, 1);
1951 }
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001952}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001953
Alan Coxf2cf8e22005-09-06 15:16:44 -07001954/* Caller holds lock */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001955static void receive_data(struct channel *ch)
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001956{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001957 unchar *rptr;
Alan Cox606d0992006-12-08 02:38:45 -08001958 struct ktermios *ts = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001959 struct tty_struct *tty;
Al Virobc9a5152005-09-15 22:53:28 +01001960 struct board_chan __iomem *bc;
Alan Coxf2cf8e22005-09-06 15:16:44 -07001961 int dataToRead, wrapgap, bytesAvailable;
1962 unsigned int tail, head;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001963 unsigned int wrapmask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001964
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001965 /*
1966 * This routine is called by doint when a receive data event has taken
1967 * place.
1968 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001969 globalwinon(ch);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001970 if (ch->statusflags & RXSTOPPED)
1971 return;
Alan Cox52d41732008-07-16 21:55:02 +01001972 tty = ch->port.tty;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001973 if (tty)
1974 ts = tty->termios;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001975 bc = ch->brdchan;
Alan Coxf2cf8e22005-09-06 15:16:44 -07001976 BUG_ON(!bc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001977 wrapmask = ch->rxbufsize - 1;
1978
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001979 /*
1980 * Get the head and tail pointers to the receiver queue. Wrap the head
1981 * pointer if it has reached the end of the buffer.
1982 */
Alan Coxf2cf8e22005-09-06 15:16:44 -07001983 head = readw(&bc->rin);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001984 head &= wrapmask;
Alan Coxf2cf8e22005-09-06 15:16:44 -07001985 tail = readw(&bc->rout) & wrapmask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001986
1987 bytesAvailable = (head - tail) & wrapmask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001988 if (bytesAvailable == 0)
1989 return;
1990
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07001991 /* If CREAD bit is off or device not open, set TX tail to head */
Alan Cox191260a2008-04-30 00:54:16 -07001992 if (!tty || !ts || !(ts->c_cflag & CREAD)) {
Al Virobc9a5152005-09-15 22:53:28 +01001993 writew(head, &bc->rout);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001994 return;
1995 }
1996
Alan Cox33f0f882006-01-09 20:54:13 -08001997 if (tty_buffer_request_room(tty, bytesAvailable + 1) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001998 return;
1999
Alan Coxf2cf8e22005-09-06 15:16:44 -07002000 if (readb(&bc->orun)) {
2001 writeb(0, &bc->orun);
Alan Cox191260a2008-04-30 00:54:16 -07002002 printk(KERN_WARNING "epca; overrun! DigiBoard device %s\n",
2003 tty->name);
Alan Cox33f0f882006-01-09 20:54:13 -08002004 tty_insert_flip_char(tty, 0, TTY_OVERRUN);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002005 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002006 rxwinon(ch);
Alan Cox191260a2008-04-30 00:54:16 -07002007 while (bytesAvailable > 0) {
2008 /* Begin while there is data on the card */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002009 wrapgap = (head >= tail) ? head - tail : ch->rxbufsize - tail;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002010 /*
2011 * Even if head has wrapped around only report the amount of
2012 * data to be equal to the size - tail. Remember memcpy can't
2013 * automaticly wrap around the receive buffer.
2014 */
Alan Cox191260a2008-04-30 00:54:16 -07002015 dataToRead = (wrapgap < bytesAvailable) ? wrapgap
2016 : bytesAvailable;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002017 /* Make sure we don't overflow the buffer */
Alan Cox33f0f882006-01-09 20:54:13 -08002018 dataToRead = tty_prepare_flip_string(tty, &rptr, dataToRead);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002019 if (dataToRead == 0)
2020 break;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002021 /*
2022 * Move data read from our card into the line disciplines
2023 * buffer for translation if necessary.
2024 */
Alan Coxf2cf8e22005-09-06 15:16:44 -07002025 memcpy_fromio(rptr, ch->rxptr + tail, dataToRead);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002026 tail = (tail + dataToRead) & wrapmask;
2027 bytesAvailable -= dataToRead;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002028 } /* End while there is data on the card */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002029 globalwinon(ch);
Alan Coxf2cf8e22005-09-06 15:16:44 -07002030 writew(tail, &bc->rout);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002031 /* Must be called with global data */
Alan Cox52d41732008-07-16 21:55:02 +01002032 tty_schedule_flip(ch->port.tty);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002033}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002034
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002035static int info_ioctl(struct tty_struct *tty, struct file *file,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002036 unsigned int cmd, unsigned long arg)
2037{
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002038 switch (cmd) {
2039 case DIGI_GETINFO:
2040 {
2041 struct digi_info di;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002042 int brd;
2043
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002044 if (get_user(brd, (unsigned int __user *)arg))
Alan Coxf2cf8e22005-09-06 15:16:44 -07002045 return -EFAULT;
2046 if (brd < 0 || brd >= num_cards || num_cards == 0)
2047 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002048
2049 memset(&di, 0, sizeof(di));
2050
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002051 di.board = brd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002052 di.status = boards[brd].status;
2053 di.type = boards[brd].type ;
2054 di.numports = boards[brd].numports ;
Alan Coxf2cf8e22005-09-06 15:16:44 -07002055 /* Legacy fixups - just move along nothing to see */
2056 di.port = (unsigned char *)boards[brd].port ;
2057 di.membase = (unsigned char *)boards[brd].membase ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002058
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002059 if (copy_to_user((void __user *)arg, &di, sizeof(di)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002060 return -EFAULT;
2061 break;
2062
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002063 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002064
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002065 case DIGI_POLLER:
2066 {
2067 int brd = arg & 0xff000000 >> 16;
2068 unsigned char state = arg & 0xff;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002069
Alan Coxf2cf8e22005-09-06 15:16:44 -07002070 if (brd < 0 || brd >= num_cards) {
2071 printk(KERN_ERR "epca: DIGI POLLER : brd not valid!\n");
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002072 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002073 }
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002074 digi_poller_inhibited = state;
2075 break;
2076 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002077
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002078 case DIGI_INIT:
2079 {
2080 /*
2081 * This call is made by the apps to complete the
Joe Perches8dfba4d2008-02-03 17:11:42 +02002082 * initialization of the board(s). This routine is
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002083 * responsible for setting the card to its initial
2084 * state and setting the drivers control fields to the
2085 * sutianle settings for the card in question.
2086 */
2087 int crd;
2088 for (crd = 0; crd < num_cards; crd++)
2089 post_fep_init(crd);
2090 break;
2091 }
2092 default:
2093 return -ENOTTY;
2094 }
2095 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002096}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002097
2098static int pc_tiocmget(struct tty_struct *tty, struct file *file)
2099{
Alan Coxc9f19e92009-01-02 13:47:26 +00002100 struct channel *ch = tty->driver_data;
Al Virobc9a5152005-09-15 22:53:28 +01002101 struct board_chan __iomem *bc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002102 unsigned int mstat, mflag = 0;
2103 unsigned long flags;
2104
2105 if (ch)
2106 bc = ch->brdchan;
2107 else
Alan Coxf2cf8e22005-09-06 15:16:44 -07002108 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002109
Alan Coxf2cf8e22005-09-06 15:16:44 -07002110 spin_lock_irqsave(&epca_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002111 globalwinon(ch);
Alan Coxf2cf8e22005-09-06 15:16:44 -07002112 mstat = readb(&bc->mstat);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002113 memoff(ch);
Alan Coxf2cf8e22005-09-06 15:16:44 -07002114 spin_unlock_irqrestore(&epca_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002115
2116 if (mstat & ch->m_dtr)
2117 mflag |= TIOCM_DTR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002118 if (mstat & ch->m_rts)
2119 mflag |= TIOCM_RTS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002120 if (mstat & ch->m_cts)
2121 mflag |= TIOCM_CTS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002122 if (mstat & ch->dsr)
2123 mflag |= TIOCM_DSR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002124 if (mstat & ch->m_ri)
2125 mflag |= TIOCM_RI;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002126 if (mstat & ch->dcd)
2127 mflag |= TIOCM_CD;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002128 return mflag;
2129}
2130
2131static int pc_tiocmset(struct tty_struct *tty, struct file *file,
2132 unsigned int set, unsigned int clear)
2133{
Alan Coxc9f19e92009-01-02 13:47:26 +00002134 struct channel *ch = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002135 unsigned long flags;
2136
Alan Coxf2cf8e22005-09-06 15:16:44 -07002137 if (!ch)
2138 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002139
Alan Coxf2cf8e22005-09-06 15:16:44 -07002140 spin_lock_irqsave(&epca_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002141 /*
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002142 * I think this modemfake stuff is broken. It doesn't correctly reflect
2143 * the behaviour desired by the TIOCM* ioctls. Therefore this is
2144 * probably broken.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002145 */
2146 if (set & TIOCM_RTS) {
2147 ch->modemfake |= ch->m_rts;
2148 ch->modem |= ch->m_rts;
2149 }
2150 if (set & TIOCM_DTR) {
2151 ch->modemfake |= ch->m_dtr;
2152 ch->modem |= ch->m_dtr;
2153 }
2154 if (clear & TIOCM_RTS) {
2155 ch->modemfake |= ch->m_rts;
2156 ch->modem &= ~ch->m_rts;
2157 }
2158 if (clear & TIOCM_DTR) {
2159 ch->modemfake |= ch->m_dtr;
2160 ch->modem &= ~ch->m_dtr;
2161 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002162 globalwinon(ch);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002163 /*
2164 * The below routine generally sets up parity, baud, flow control
2165 * issues, etc.... It effect both control flags and input flags.
2166 */
Alan Cox191260a2008-04-30 00:54:16 -07002167 epcaparam(tty, ch);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002168 memoff(ch);
Alan Coxf2cf8e22005-09-06 15:16:44 -07002169 spin_unlock_irqrestore(&epca_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002170 return 0;
2171}
2172
Alan Cox191260a2008-04-30 00:54:16 -07002173static int pc_ioctl(struct tty_struct *tty, struct file *file,
2174 unsigned int cmd, unsigned long arg)
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002175{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002176 digiflow_t dflow;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002177 unsigned long flags;
2178 unsigned int mflag, mstat;
2179 unsigned char startc, stopc;
Al Virobc9a5152005-09-15 22:53:28 +01002180 struct board_chan __iomem *bc;
Alan Coxc9f19e92009-01-02 13:47:26 +00002181 struct channel *ch = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002182 void __user *argp = (void __user *)arg;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002183
Linus Torvalds1da177e2005-04-16 15:20:36 -07002184 if (ch)
2185 bc = ch->brdchan;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002186 else
Alan Coxf2cf8e22005-09-06 15:16:44 -07002187 return -EINVAL;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002188 switch (cmd) {
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002189 case TIOCMODG:
2190 mflag = pc_tiocmget(tty, file);
2191 if (put_user(mflag, (unsigned long __user *)argp))
2192 return -EFAULT;
2193 break;
2194 case TIOCMODS:
2195 if (get_user(mstat, (unsigned __user *)argp))
2196 return -EFAULT;
2197 return pc_tiocmset(tty, file, mstat, ~mstat);
2198 case TIOCSDTR:
2199 spin_lock_irqsave(&epca_lock, flags);
2200 ch->omodem |= ch->m_dtr;
2201 globalwinon(ch);
2202 fepcmd(ch, SETMODEM, ch->m_dtr, 0, 10, 1);
2203 memoff(ch);
2204 spin_unlock_irqrestore(&epca_lock, flags);
2205 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002206
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002207 case TIOCCDTR:
2208 spin_lock_irqsave(&epca_lock, flags);
2209 ch->omodem &= ~ch->m_dtr;
2210 globalwinon(ch);
2211 fepcmd(ch, SETMODEM, 0, ch->m_dtr, 10, 1);
2212 memoff(ch);
2213 spin_unlock_irqrestore(&epca_lock, flags);
2214 break;
2215 case DIGI_GETA:
2216 if (copy_to_user(argp, &ch->digiext, sizeof(digi_t)))
2217 return -EFAULT;
2218 break;
2219 case DIGI_SETAW:
2220 case DIGI_SETAF:
Alan Cox37925e02008-04-30 00:53:17 -07002221 lock_kernel();
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002222 if (cmd == DIGI_SETAW) {
Alan Cox191260a2008-04-30 00:54:16 -07002223 /* Setup an event to indicate when the transmit
2224 buffer empties */
Alan Coxf2cf8e22005-09-06 15:16:44 -07002225 spin_lock_irqsave(&epca_lock, flags);
Alan Cox191260a2008-04-30 00:54:16 -07002226 setup_empty_event(tty, ch);
Alan Coxf2cf8e22005-09-06 15:16:44 -07002227 spin_unlock_irqrestore(&epca_lock, flags);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002228 tty_wait_until_sent(tty, 0);
2229 } else {
2230 /* ldisc lock already held in ioctl */
Alan Coxa352def2008-07-16 21:53:12 +01002231 if (tty->ldisc.ops->flush_buffer)
2232 tty->ldisc.ops->flush_buffer(tty);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002233 }
Alan Cox37925e02008-04-30 00:53:17 -07002234 unlock_kernel();
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002235 /* Fall Thru */
2236 case DIGI_SETA:
2237 if (copy_from_user(&ch->digiext, argp, sizeof(digi_t)))
2238 return -EFAULT;
2239
2240 if (ch->digiext.digi_flags & DIGI_ALTPIN) {
2241 ch->dcd = ch->m_dsr;
2242 ch->dsr = ch->m_dcd;
2243 } else {
2244 ch->dcd = ch->m_dcd;
2245 ch->dsr = ch->m_dsr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002246 }
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002247
2248 spin_lock_irqsave(&epca_lock, flags);
2249 globalwinon(ch);
2250
2251 /*
2252 * The below routine generally sets up parity, baud, flow
2253 * control issues, etc.... It effect both control flags and
2254 * input flags.
2255 */
Alan Cox191260a2008-04-30 00:54:16 -07002256 epcaparam(tty, ch);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002257 memoff(ch);
2258 spin_unlock_irqrestore(&epca_lock, flags);
2259 break;
2260
2261 case DIGI_GETFLOW:
2262 case DIGI_GETAFLOW:
2263 spin_lock_irqsave(&epca_lock, flags);
2264 globalwinon(ch);
2265 if (cmd == DIGI_GETFLOW) {
2266 dflow.startc = readb(&bc->startc);
2267 dflow.stopc = readb(&bc->stopc);
2268 } else {
2269 dflow.startc = readb(&bc->startca);
2270 dflow.stopc = readb(&bc->stopca);
2271 }
2272 memoff(ch);
2273 spin_unlock_irqrestore(&epca_lock, flags);
2274
2275 if (copy_to_user(argp, &dflow, sizeof(dflow)))
2276 return -EFAULT;
2277 break;
2278
2279 case DIGI_SETAFLOW:
2280 case DIGI_SETFLOW:
2281 if (cmd == DIGI_SETFLOW) {
2282 startc = ch->startc;
2283 stopc = ch->stopc;
2284 } else {
2285 startc = ch->startca;
2286 stopc = ch->stopca;
2287 }
2288
2289 if (copy_from_user(&dflow, argp, sizeof(dflow)))
2290 return -EFAULT;
2291
Alan Cox191260a2008-04-30 00:54:16 -07002292 if (dflow.startc != startc || dflow.stopc != stopc) {
2293 /* Begin if setflow toggled */
Alan Coxf2cf8e22005-09-06 15:16:44 -07002294 spin_lock_irqsave(&epca_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002295 globalwinon(ch);
2296
Alan Coxf2cf8e22005-09-06 15:16:44 -07002297 if (cmd == DIGI_SETFLOW) {
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002298 ch->fepstartc = ch->startc = dflow.startc;
2299 ch->fepstopc = ch->stopc = dflow.stopc;
Alan Cox191260a2008-04-30 00:54:16 -07002300 fepcmd(ch, SONOFFC, ch->fepstartc,
2301 ch->fepstopc, 0, 1);
Alan Coxf2cf8e22005-09-06 15:16:44 -07002302 } else {
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002303 ch->fepstartca = ch->startca = dflow.startc;
2304 ch->fepstopca = ch->stopca = dflow.stopc;
Alan Cox191260a2008-04-30 00:54:16 -07002305 fepcmd(ch, SAUXONOFFC, ch->fepstartca,
2306 ch->fepstopca, 0, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002307 }
2308
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002309 if (ch->statusflags & TXSTOPPED)
2310 pc_start(tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002311
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002312 memoff(ch);
2313 spin_unlock_irqrestore(&epca_lock, flags);
2314 } /* End if setflow toggled */
2315 break;
2316 default:
2317 return -ENOIOCTLCMD;
2318 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002319 return 0;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002320}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002321
Alan Cox606d0992006-12-08 02:38:45 -08002322static void pc_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002323{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002324 struct channel *ch;
2325 unsigned long flags;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002326 /*
2327 * verifyChannel returns the channel from the tty struct if it is
2328 * valid. This serves as a sanity check.
2329 */
Alan Cox191260a2008-04-30 00:54:16 -07002330 ch = verifyChannel(tty);
2331
2332 if (ch != NULL) { /* Begin if channel valid */
Alan Coxf2cf8e22005-09-06 15:16:44 -07002333 spin_lock_irqsave(&epca_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002334 globalwinon(ch);
2335 epcaparam(tty, ch);
2336 memoff(ch);
Alan Coxf2cf8e22005-09-06 15:16:44 -07002337 spin_unlock_irqrestore(&epca_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002338
2339 if ((old_termios->c_cflag & CRTSCTS) &&
2340 ((tty->termios->c_cflag & CRTSCTS) == 0))
2341 tty->hw_stopped = 0;
2342
2343 if (!(old_termios->c_cflag & CLOCAL) &&
2344 (tty->termios->c_cflag & CLOCAL))
Alan Cox52d41732008-07-16 21:55:02 +01002345 wake_up_interruptible(&ch->port.open_wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002346
Linus Torvalds1da177e2005-04-16 15:20:36 -07002347 } /* End if channel valid */
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002348}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002349
David Howellsc4028952006-11-22 14:57:56 +00002350static void do_softint(struct work_struct *work)
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002351{
David Howellsc4028952006-11-22 14:57:56 +00002352 struct channel *ch = container_of(work, struct channel, tqueue);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002353 /* Called in response to a modem change event */
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002354 if (ch && ch->magic == EPCA_MAGIC) {
Alan Cox52d41732008-07-16 21:55:02 +01002355 struct tty_struct *tty = ch->port.tty;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002356
Alan Coxf2cf8e22005-09-06 15:16:44 -07002357 if (tty && tty->driver_data) {
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002358 if (test_and_clear_bit(EPCA_EVENT_HANGUP, &ch->event)) {
Alan Cox191260a2008-04-30 00:54:16 -07002359 tty_hangup(tty);
Alan Cox52d41732008-07-16 21:55:02 +01002360 wake_up_interruptible(&ch->port.open_wait);
2361 ch->port.flags &= ~ASYNC_NORMAL_ACTIVE;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002362 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002363 }
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002364 }
2365}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002366
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002367/*
2368 * pc_stop and pc_start provide software flow control to the routine and the
2369 * pc_ioctl routine.
2370 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002371static void pc_stop(struct tty_struct *tty)
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002372{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002373 struct channel *ch;
2374 unsigned long flags;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002375 /*
2376 * verifyChannel returns the channel from the tty struct if it is
2377 * valid. This serves as a sanity check.
2378 */
Alan Cox191260a2008-04-30 00:54:16 -07002379 ch = verifyChannel(tty);
2380 if (ch != NULL) {
Alan Coxf2cf8e22005-09-06 15:16:44 -07002381 spin_lock_irqsave(&epca_lock, flags);
Alan Cox191260a2008-04-30 00:54:16 -07002382 if ((ch->statusflags & TXSTOPPED) == 0) {
2383 /* Begin if transmit stop requested */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002384 globalwinon(ch);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002385 /* STOP transmitting now !! */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002386 fepcmd(ch, PAUSETX, 0, 0, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002387 ch->statusflags |= TXSTOPPED;
2388 memoff(ch);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002389 } /* End if transmit stop requested */
Alan Coxf2cf8e22005-09-06 15:16:44 -07002390 spin_unlock_irqrestore(&epca_lock, flags);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002391 }
2392}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002393
2394static void pc_start(struct tty_struct *tty)
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002395{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002396 struct channel *ch;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002397 /*
2398 * verifyChannel returns the channel from the tty struct if it is
2399 * valid. This serves as a sanity check.
2400 */
Alan Cox191260a2008-04-30 00:54:16 -07002401 ch = verifyChannel(tty);
2402 if (ch != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002403 unsigned long flags;
Alan Coxf2cf8e22005-09-06 15:16:44 -07002404 spin_lock_irqsave(&epca_lock, flags);
Alan Cox191260a2008-04-30 00:54:16 -07002405 /* Just in case output was resumed because of a change
2406 in Digi-flow */
2407 if (ch->statusflags & TXSTOPPED) {
2408 /* Begin transmit resume requested */
Al Virobc9a5152005-09-15 22:53:28 +01002409 struct board_chan __iomem *bc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002410 globalwinon(ch);
2411 bc = ch->brdchan;
2412 if (ch->statusflags & LOWWAIT)
Alan Coxf2cf8e22005-09-06 15:16:44 -07002413 writeb(1, &bc->ilow);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002414 /* Okay, you can start transmitting again... */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002415 fepcmd(ch, RESUMETX, 0, 0, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002416 ch->statusflags &= ~TXSTOPPED;
2417 memoff(ch);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002418 } /* End transmit resume requested */
Alan Coxf2cf8e22005-09-06 15:16:44 -07002419 spin_unlock_irqrestore(&epca_lock, flags);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002420 }
2421}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002422
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002423/*
2424 * The below routines pc_throttle and pc_unthrottle are used to slow (And
2425 * resume) the receipt of data into the kernels receive buffers. The exact
2426 * occurrence of this depends on the size of the kernels receive buffer and
2427 * what the 'watermarks' are set to for that buffer. See the n_ttys.c file for
2428 * more details.
2429 */
2430static void pc_throttle(struct tty_struct *tty)
2431{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002432 struct channel *ch;
2433 unsigned long flags;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002434 /*
2435 * verifyChannel returns the channel from the tty struct if it is
2436 * valid. This serves as a sanity check.
2437 */
Alan Cox191260a2008-04-30 00:54:16 -07002438 ch = verifyChannel(tty);
2439 if (ch != NULL) {
Alan Coxf2cf8e22005-09-06 15:16:44 -07002440 spin_lock_irqsave(&epca_lock, flags);
2441 if ((ch->statusflags & RXSTOPPED) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002442 globalwinon(ch);
2443 fepcmd(ch, PAUSERX, 0, 0, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002444 ch->statusflags |= RXSTOPPED;
2445 memoff(ch);
2446 }
Alan Coxf2cf8e22005-09-06 15:16:44 -07002447 spin_unlock_irqrestore(&epca_lock, flags);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002448 }
2449}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002450
2451static void pc_unthrottle(struct tty_struct *tty)
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002452{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002453 struct channel *ch;
2454 unsigned long flags;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002455 /*
2456 * verifyChannel returns the channel from the tty struct if it is
2457 * valid. This serves as a sanity check.
2458 */
Alan Cox191260a2008-04-30 00:54:16 -07002459 ch = verifyChannel(tty);
2460 if (ch != NULL) {
2461 /* Just in case output was resumed because of a change
2462 in Digi-flow */
Alan Coxf2cf8e22005-09-06 15:16:44 -07002463 spin_lock_irqsave(&epca_lock, flags);
2464 if (ch->statusflags & RXSTOPPED) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002465 globalwinon(ch);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002466 fepcmd(ch, RESUMERX, 0, 0, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002467 ch->statusflags &= ~RXSTOPPED;
2468 memoff(ch);
2469 }
Alan Coxf2cf8e22005-09-06 15:16:44 -07002470 spin_unlock_irqrestore(&epca_lock, flags);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002471 }
2472}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002473
Alan Coxdcbf1282008-07-22 11:18:12 +01002474static int pc_send_break(struct tty_struct *tty, int msec)
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002475{
Alan Coxc9f19e92009-01-02 13:47:26 +00002476 struct channel *ch = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002477 unsigned long flags;
2478
Alan Coxdcbf1282008-07-22 11:18:12 +01002479 if (msec == -1)
Alan Cox252883e2008-10-17 20:28:25 +01002480 msec = 0xFFFF;
2481 else if (msec > 0xFFFE)
2482 msec = 0xFFFE;
2483 else if (msec < 1)
2484 msec = 1;
Alan Coxdcbf1282008-07-22 11:18:12 +01002485
Alan Coxf2cf8e22005-09-06 15:16:44 -07002486 spin_lock_irqsave(&epca_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002487 globalwinon(ch);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002488 /*
2489 * Maybe I should send an infinite break here, schedule() for msec
2490 * amount of time, and then stop the break. This way, the user can't
2491 * screw up the FEP by causing digi_send_break() to be called (i.e. via
2492 * an ioctl()) more than once in msec amount of time.
2493 * Try this for now...
2494 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002495 fepcmd(ch, SENDBREAK, msec, 0, 10, 0);
2496 memoff(ch);
Alan Coxf2cf8e22005-09-06 15:16:44 -07002497 spin_unlock_irqrestore(&epca_lock, flags);
Alan Coxdcbf1282008-07-22 11:18:12 +01002498 return 0;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002499}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002500
Alan Coxf2cf8e22005-09-06 15:16:44 -07002501/* Caller MUST hold the lock */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002502static void setup_empty_event(struct tty_struct *tty, struct channel *ch)
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002503{
Al Virobc9a5152005-09-15 22:53:28 +01002504 struct board_chan __iomem *bc = ch->brdchan;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002505
Linus Torvalds1da177e2005-04-16 15:20:36 -07002506 globalwinon(ch);
2507 ch->statusflags |= EMPTYWAIT;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002508 /*
2509 * When set the iempty flag request a event to be generated when the
2510 * transmit buffer is empty (If there is no BREAK in progress).
2511 */
Alan Coxf2cf8e22005-09-06 15:16:44 -07002512 writeb(1, &bc->iempty);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002513 memoff(ch);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002514}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002515
David Howells88e88242008-07-22 11:20:45 +01002516#ifndef MODULE
2517static void __init epca_setup(char *str, int *ints)
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002518{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002519 struct board_info board;
2520 int index, loop, last;
2521 char *temp, *t2;
2522 unsigned len;
2523
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002524 /*
2525 * If this routine looks a little strange it is because it is only
2526 * called if a LILO append command is given to boot the kernel with
2527 * parameters. In this way, we can provide the user a method of
2528 * changing his board configuration without rebuilding the kernel.
2529 */
2530 if (!liloconfig)
2531 liloconfig = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002532
2533 memset(&board, 0, sizeof(board));
2534
2535 /* Assume the data is int first, later we can change it */
2536 /* I think that array position 0 of ints holds the number of args */
2537 for (last = 0, index = 1; index <= ints[0]; index++)
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002538 switch (index) { /* Begin parse switch */
2539 case 1:
2540 board.status = ints[index];
2541 /*
2542 * We check for 2 (As opposed to 1; because 2 is a flag
2543 * instructing the driver to ignore epcaconfig.) For
2544 * this reason we check for 2.
2545 */
Alan Cox191260a2008-04-30 00:54:16 -07002546 if (board.status == 2) {
2547 /* Begin ignore epcaconfig as well as lilo cmd line */
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002548 nbdevs = 0;
2549 num_cards = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002550 return;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002551 } /* End ignore epcaconfig as well as lilo cmd line */
2552
2553 if (board.status > 2) {
Alan Cox191260a2008-04-30 00:54:16 -07002554 printk(KERN_ERR "epca_setup: Invalid board status 0x%x\n",
2555 board.status);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002556 invalid_lilo_config = 1;
2557 setup_error_code |= INVALID_BOARD_STATUS;
2558 return;
2559 }
2560 last = index;
2561 break;
2562 case 2:
2563 board.type = ints[index];
2564 if (board.type >= PCIXEM) {
2565 printk(KERN_ERR "epca_setup: Invalid board type 0x%x\n", board.type);
2566 invalid_lilo_config = 1;
2567 setup_error_code |= INVALID_BOARD_TYPE;
2568 return;
2569 }
2570 last = index;
2571 break;
2572 case 3:
2573 board.altpin = ints[index];
2574 if (board.altpin > 1) {
2575 printk(KERN_ERR "epca_setup: Invalid board altpin 0x%x\n", board.altpin);
2576 invalid_lilo_config = 1;
2577 setup_error_code |= INVALID_ALTPIN;
2578 return;
2579 }
2580 last = index;
2581 break;
2582
2583 case 4:
2584 board.numports = ints[index];
2585 if (board.numports < 2 || board.numports > 256) {
2586 printk(KERN_ERR "epca_setup: Invalid board numports 0x%x\n", board.numports);
2587 invalid_lilo_config = 1;
2588 setup_error_code |= INVALID_NUM_PORTS;
2589 return;
2590 }
2591 nbdevs += board.numports;
2592 last = index;
2593 break;
2594
2595 case 5:
2596 board.port = ints[index];
2597 if (ints[index] <= 0) {
2598 printk(KERN_ERR "epca_setup: Invalid io port 0x%x\n", (unsigned int)board.port);
2599 invalid_lilo_config = 1;
2600 setup_error_code |= INVALID_PORT_BASE;
2601 return;
2602 }
2603 last = index;
2604 break;
2605
2606 case 6:
2607 board.membase = ints[index];
2608 if (ints[index] <= 0) {
Alan Cox191260a2008-04-30 00:54:16 -07002609 printk(KERN_ERR "epca_setup: Invalid memory base 0x%x\n",
2610 (unsigned int)board.membase);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002611 invalid_lilo_config = 1;
2612 setup_error_code |= INVALID_MEM_BASE;
2613 return;
2614 }
2615 last = index;
2616 break;
2617
2618 default:
2619 printk(KERN_ERR "<Error> - epca_setup: Too many integer parms\n");
2620 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002621
2622 } /* End parse switch */
2623
Alan Coxf2cf8e22005-09-06 15:16:44 -07002624 while (str && *str) { /* Begin while there is a string arg */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002625 /* find the next comma or terminator */
2626 temp = str;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002627 /* While string is not null, and a comma hasn't been found */
2628 while (*temp && (*temp != ','))
2629 temp++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002630 if (!*temp)
2631 temp = NULL;
2632 else
2633 *temp++ = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002634 /* Set index to the number of args + 1 */
2635 index = last + 1;
2636
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002637 switch (index) {
2638 case 1:
2639 len = strlen(str);
2640 if (strncmp("Disable", str, len) == 0)
2641 board.status = 0;
2642 else if (strncmp("Enable", str, len) == 0)
2643 board.status = 1;
2644 else {
2645 printk(KERN_ERR "epca_setup: Invalid status %s\n", str);
2646 invalid_lilo_config = 1;
2647 setup_error_code |= INVALID_BOARD_STATUS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002648 return;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002649 }
2650 last = index;
2651 break;
2652
2653 case 2:
2654 for (loop = 0; loop < EPCA_NUM_TYPES; loop++)
2655 if (strcmp(board_desc[loop], str) == 0)
2656 break;
2657 /*
2658 * If the index incremented above refers to a
2659 * legitamate board type set it here.
2660 */
2661 if (index < EPCA_NUM_TYPES)
2662 board.type = loop;
2663 else {
2664 printk(KERN_ERR "epca_setup: Invalid board type: %s\n", str);
2665 invalid_lilo_config = 1;
2666 setup_error_code |= INVALID_BOARD_TYPE;
2667 return;
2668 }
2669 last = index;
2670 break;
2671
2672 case 3:
2673 len = strlen(str);
2674 if (strncmp("Disable", str, len) == 0)
2675 board.altpin = 0;
2676 else if (strncmp("Enable", str, len) == 0)
2677 board.altpin = 1;
2678 else {
2679 printk(KERN_ERR "epca_setup: Invalid altpin %s\n", str);
2680 invalid_lilo_config = 1;
2681 setup_error_code |= INVALID_ALTPIN;
2682 return;
2683 }
2684 last = index;
2685 break;
2686
2687 case 4:
2688 t2 = str;
2689 while (isdigit(*t2))
2690 t2++;
2691
2692 if (*t2) {
2693 printk(KERN_ERR "epca_setup: Invalid port count %s\n", str);
2694 invalid_lilo_config = 1;
2695 setup_error_code |= INVALID_NUM_PORTS;
2696 return;
2697 }
2698
2699 /*
2700 * There is not a man page for simple_strtoul but the
2701 * code can be found in vsprintf.c. The first argument
2702 * is the string to translate (To an unsigned long
2703 * obviously), the second argument can be the address
2704 * of any character variable or a NULL. If a variable
2705 * is given, the end pointer of the string will be
2706 * stored in that variable; if a NULL is given the end
2707 * pointer will not be returned. The last argument is
2708 * the base to use. If a 0 is indicated, the routine
2709 * will attempt to determine the proper base by looking
2710 * at the values prefix (A '0' for octal, a 'x' for
2711 * hex, etc ... If a value is given it will use that
2712 * value as the base.
2713 */
2714 board.numports = simple_strtoul(str, NULL, 0);
2715 nbdevs += board.numports;
2716 last = index;
2717 break;
2718
2719 case 5:
2720 t2 = str;
2721 while (isxdigit(*t2))
2722 t2++;
2723
2724 if (*t2) {
2725 printk(KERN_ERR "epca_setup: Invalid i/o address %s\n", str);
2726 invalid_lilo_config = 1;
2727 setup_error_code |= INVALID_PORT_BASE;
2728 return;
2729 }
2730
2731 board.port = simple_strtoul(str, NULL, 16);
2732 last = index;
2733 break;
2734
2735 case 6:
2736 t2 = str;
2737 while (isxdigit(*t2))
2738 t2++;
2739
2740 if (*t2) {
Alan Cox191260a2008-04-30 00:54:16 -07002741 printk(KERN_ERR "epca_setup: Invalid memory base %s\n", str);
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002742 invalid_lilo_config = 1;
2743 setup_error_code |= INVALID_MEM_BASE;
2744 return;
2745 }
2746 board.membase = simple_strtoul(str, NULL, 16);
2747 last = index;
2748 break;
2749 default:
2750 printk(KERN_ERR "epca: Too many string parms\n");
2751 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002752 }
2753 str = temp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002754 } /* End while there is a string arg */
2755
Alan Coxf2cf8e22005-09-06 15:16:44 -07002756 if (last < 6) {
2757 printk(KERN_ERR "epca: Insufficient parms specified\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002758 return;
2759 }
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002760
Linus Torvalds1da177e2005-04-16 15:20:36 -07002761 /* I should REALLY validate the stuff here */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002762 /* Copies our local copy of board into boards */
Alan Cox191260a2008-04-30 00:54:16 -07002763 memcpy((void *)&boards[num_cards], (void *)&board, sizeof(board));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002764 /* Does this get called once per lilo arg are what ? */
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002765 printk(KERN_INFO "PC/Xx: Added board %i, %s %i ports at 0x%4.4X base 0x%6.6X\n",
2766 num_cards, board_desc[board.type],
Linus Torvalds1da177e2005-04-16 15:20:36 -07002767 board.numports, (int)board.port, (unsigned int) board.membase);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002768 num_cards++;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002769}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002770
David Howells88e88242008-07-22 11:20:45 +01002771static int __init epca_real_setup(char *str)
2772{
2773 int ints[11];
2774
2775 epca_setup(get_options(str, 11, ints), ints);
2776 return 1;
2777}
2778
2779__setup("digiepca", epca_real_setup);
2780#endif
2781
Linus Torvalds1da177e2005-04-16 15:20:36 -07002782enum epic_board_types {
2783 brd_xr = 0,
2784 brd_xem,
2785 brd_cx,
2786 brd_xrj,
2787};
2788
Linus Torvalds1da177e2005-04-16 15:20:36 -07002789/* indexed directly by epic_board_types enum */
2790static struct {
2791 unsigned char board_type;
2792 unsigned bar_idx; /* PCI base address region */
2793} epca_info_tbl[] = {
2794 { PCIXR, 0, },
2795 { PCIXEM, 0, },
2796 { PCICX, 0, },
2797 { PCIXRJ, 2, },
2798};
2799
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002800static int __devinit epca_init_one(struct pci_dev *pdev,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002801 const struct pci_device_id *ent)
2802{
2803 static int board_num = -1;
2804 int board_idx, info_idx = ent->driver_data;
2805 unsigned long addr;
2806
2807 if (pci_enable_device(pdev))
2808 return -EIO;
2809
2810 board_num++;
2811 board_idx = board_num + num_cards;
2812 if (board_idx >= MAXBOARDS)
2813 goto err_out;
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002814
Alan Cox191260a2008-04-30 00:54:16 -07002815 addr = pci_resource_start(pdev, epca_info_tbl[info_idx].bar_idx);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002816 if (!addr) {
Alan Cox191260a2008-04-30 00:54:16 -07002817 printk(KERN_ERR PFX "PCI region #%d not available (size 0)\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07002818 epca_info_tbl[info_idx].bar_idx);
2819 goto err_out;
2820 }
2821
2822 boards[board_idx].status = ENABLED;
2823 boards[board_idx].type = epca_info_tbl[info_idx].board_type;
2824 boards[board_idx].numports = 0x0;
Alan Coxf2cf8e22005-09-06 15:16:44 -07002825 boards[board_idx].port = addr + PCI_IO_OFFSET;
2826 boards[board_idx].membase = addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002827
Alan Cox191260a2008-04-30 00:54:16 -07002828 if (!request_mem_region(addr + PCI_IO_OFFSET, 0x200000, "epca")) {
2829 printk(KERN_ERR PFX "resource 0x%x @ 0x%lx unavailable\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07002830 0x200000, addr + PCI_IO_OFFSET);
2831 goto err_out;
2832 }
2833
Alan Cox191260a2008-04-30 00:54:16 -07002834 boards[board_idx].re_map_port = ioremap_nocache(addr + PCI_IO_OFFSET,
2835 0x200000);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002836 if (!boards[board_idx].re_map_port) {
Alan Cox191260a2008-04-30 00:54:16 -07002837 printk(KERN_ERR PFX "cannot map 0x%x @ 0x%lx\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07002838 0x200000, addr + PCI_IO_OFFSET);
2839 goto err_out_free_pciio;
2840 }
2841
Alan Cox191260a2008-04-30 00:54:16 -07002842 if (!request_mem_region(addr, 0x200000, "epca")) {
2843 printk(KERN_ERR PFX "resource 0x%x @ 0x%lx unavailable\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07002844 0x200000, addr);
2845 goto err_out_free_iounmap;
2846 }
2847
Alan Cox191260a2008-04-30 00:54:16 -07002848 boards[board_idx].re_map_membase = ioremap_nocache(addr, 0x200000);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002849 if (!boards[board_idx].re_map_membase) {
Alan Cox191260a2008-04-30 00:54:16 -07002850 printk(KERN_ERR PFX "cannot map 0x%x @ 0x%lx\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07002851 0x200000, addr + PCI_IO_OFFSET);
2852 goto err_out_free_memregion;
2853 }
2854
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002855 /*
2856 * I don't know what the below does, but the hardware guys say its
2857 * required on everything except PLX (In this case XRJ).
2858 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002859 if (info_idx != brd_xrj) {
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002860 pci_write_config_byte(pdev, 0x40, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002861 pci_write_config_byte(pdev, 0x46, 0);
2862 }
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002863
Linus Torvalds1da177e2005-04-16 15:20:36 -07002864 return 0;
2865
2866err_out_free_memregion:
Alan Cox191260a2008-04-30 00:54:16 -07002867 release_mem_region(addr, 0x200000);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002868err_out_free_iounmap:
Alan Cox191260a2008-04-30 00:54:16 -07002869 iounmap(boards[board_idx].re_map_port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002870err_out_free_pciio:
Alan Cox191260a2008-04-30 00:54:16 -07002871 release_mem_region(addr + PCI_IO_OFFSET, 0x200000);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002872err_out:
2873 return -ENODEV;
2874}
2875
2876
2877static struct pci_device_id epca_pci_tbl[] = {
2878 { PCI_VENDOR_DIGI, PCI_DEVICE_XR, PCI_ANY_ID, PCI_ANY_ID, 0, 0, brd_xr },
2879 { PCI_VENDOR_DIGI, PCI_DEVICE_XEM, PCI_ANY_ID, PCI_ANY_ID, 0, 0, brd_xem },
2880 { PCI_VENDOR_DIGI, PCI_DEVICE_CX, PCI_ANY_ID, PCI_ANY_ID, 0, 0, brd_cx },
2881 { PCI_VENDOR_DIGI, PCI_DEVICE_XRJ, PCI_ANY_ID, PCI_ANY_ID, 0, 0, brd_xrj },
2882 { 0, }
2883};
2884
2885MODULE_DEVICE_TABLE(pci, epca_pci_tbl);
2886
Harvey Harrison11fb09b2008-04-30 00:53:52 -07002887static int __init init_PCI(void)
Alexey Dobriyanae0b78d2007-10-16 23:26:37 -07002888{
Alan Cox191260a2008-04-30 00:54:16 -07002889 memset(&epca_driver, 0, sizeof(epca_driver));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002890 epca_driver.name = "epca";
2891 epca_driver.id_table = epca_pci_tbl;
2892 epca_driver.probe = epca_init_one;
2893
2894 return pci_register_driver(&epca_driver);
Alan Coxf2cf8e22005-09-06 15:16:44 -07002895}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002896
2897MODULE_LICENSE("GPL");