blob: 12d327a2c9ba72cadd471670f6300cca3e9a1ad0 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*****************************************************************************/
2/*
3 * moxa.c -- MOXA Intellio family multiport serial driver.
4 *
Jiri Slabyb9705b62008-04-30 00:53:48 -07005 * Copyright (C) 1999-2000 Moxa Technologies (support@moxa.com).
6 * Copyright (c) 2007 Jiri Slaby <jirislaby@gmail.com>
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 *
8 * This code is loosely based on the Linux serial driver, written by
9 * Linus Torvalds, Theodore T'so and others.
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
Linus Torvalds1da177e2005-04-16 15:20:36 -070015 */
16
17/*
18 * MOXA Intellio Series Driver
19 * for : LINUX
20 * date : 1999/1/7
21 * version : 5.1
22 */
23
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include <linux/module.h>
25#include <linux/types.h>
26#include <linux/mm.h>
27#include <linux/ioport.h>
28#include <linux/errno.h>
Jiri Slaby03718232008-04-30 00:53:39 -070029#include <linux/firmware.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070030#include <linux/signal.h>
31#include <linux/sched.h>
32#include <linux/timer.h>
33#include <linux/interrupt.h>
34#include <linux/tty.h>
35#include <linux/tty_flip.h>
36#include <linux/major.h>
37#include <linux/string.h>
38#include <linux/fcntl.h>
39#include <linux/ptrace.h>
40#include <linux/serial.h>
41#include <linux/tty_driver.h>
42#include <linux/delay.h>
43#include <linux/pci.h>
44#include <linux/init.h>
45#include <linux/bitops.h>
46
47#include <asm/system.h>
48#include <asm/io.h>
49#include <asm/uaccess.h>
50
Jiri Slaby03718232008-04-30 00:53:39 -070051#include "moxa.h"
52
Jiri Slabyb9705b62008-04-30 00:53:48 -070053#define MOXA_VERSION "6.0k"
Linus Torvalds1da177e2005-04-16 15:20:36 -070054
Jiri Slaby03718232008-04-30 00:53:39 -070055#define MOXA_FW_HDRLEN 32
56
Jiri Slaby11324ed2007-02-10 01:45:31 -080057#define MOXAMAJOR 172
Linus Torvalds1da177e2005-04-16 15:20:36 -070058
Jiri Slaby11324ed2007-02-10 01:45:31 -080059#define MAX_BOARDS 4 /* Don't change this value */
Linus Torvalds1da177e2005-04-16 15:20:36 -070060#define MAX_PORTS_PER_BOARD 32 /* Don't change this value */
Jiri Slaby11324ed2007-02-10 01:45:31 -080061#define MAX_PORTS (MAX_BOARDS * MAX_PORTS_PER_BOARD)
Linus Torvalds1da177e2005-04-16 15:20:36 -070062
Jiri Slaby08d01c72008-04-30 00:53:47 -070063#define MOXA_IS_320(brd) ((brd)->boardType == MOXA_BOARD_C320_ISA || \
64 (brd)->boardType == MOXA_BOARD_C320_PCI)
65
Linus Torvalds1da177e2005-04-16 15:20:36 -070066/*
67 * Define the Moxa PCI vendor and device IDs.
68 */
Jiri Slaby11324ed2007-02-10 01:45:31 -080069#define MOXA_BUS_TYPE_ISA 0
70#define MOXA_BUS_TYPE_PCI 1
Linus Torvalds1da177e2005-04-16 15:20:36 -070071
Linus Torvalds1da177e2005-04-16 15:20:36 -070072enum {
73 MOXA_BOARD_C218_PCI = 1,
74 MOXA_BOARD_C218_ISA,
75 MOXA_BOARD_C320_PCI,
76 MOXA_BOARD_C320_ISA,
77 MOXA_BOARD_CP204J,
78};
79
80static char *moxa_brdname[] =
81{
82 "C218 Turbo PCI series",
83 "C218 Turbo ISA series",
84 "C320 Turbo PCI series",
85 "C320 Turbo ISA series",
86 "CP-204J series",
87};
88
89#ifdef CONFIG_PCI
90static struct pci_device_id moxa_pcibrds[] = {
Jiri Slaby5ebb4072007-02-10 01:45:30 -080091 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C218),
92 .driver_data = MOXA_BOARD_C218_PCI },
93 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C320),
94 .driver_data = MOXA_BOARD_C320_PCI },
95 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP204J),
96 .driver_data = MOXA_BOARD_CP204J },
Linus Torvalds1da177e2005-04-16 15:20:36 -070097 { 0 }
98};
99MODULE_DEVICE_TABLE(pci, moxa_pcibrds);
100#endif /* CONFIG_PCI */
101
Jiri Slaby03718232008-04-30 00:53:39 -0700102struct moxa_port;
103
Jiri Slaby8f8ecba2007-02-10 01:45:33 -0800104static struct moxa_board_conf {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 int boardType;
106 int numPorts;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 int busType;
Jiri Slaby8f8ecba2007-02-10 01:45:33 -0800108
Jiri Slaby810ab092008-04-30 00:53:41 -0700109 unsigned int ready;
Jiri Slaby8f8ecba2007-02-10 01:45:33 -0800110
Jiri Slaby03718232008-04-30 00:53:39 -0700111 struct moxa_port *ports;
112
Jiri Slaby8f8ecba2007-02-10 01:45:33 -0800113 void __iomem *basemem;
114 void __iomem *intNdx;
115 void __iomem *intPend;
116 void __iomem *intTable;
117} moxa_boards[MAX_BOARDS];
118
119struct mxser_mstatus {
120 tcflag_t cflag;
121 int cts;
122 int dsr;
123 int ri;
124 int dcd;
Jiri Slaby9dff89c2007-02-10 01:45:30 -0800125};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126
Jiri Slaby8f8ecba2007-02-10 01:45:33 -0800127struct moxaq_str {
128 int inq;
129 int outq;
130};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131
Jiri Slaby8f8ecba2007-02-10 01:45:33 -0800132struct moxa_port {
Alan Cox9de6a512008-07-16 21:56:02 +0100133 struct tty_port port;
Jiri Slabyb4173f42008-04-30 00:53:40 -0700134 struct moxa_board_conf *board;
Jiri Slaby7bcf97d2008-04-30 00:53:43 -0700135 void __iomem *tableAddr;
136
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 int type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 int cflag;
Jiri Slaby7bcf97d2008-04-30 00:53:43 -0700139 unsigned long statusflags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140
Jiri Slaby7bcf97d2008-04-30 00:53:43 -0700141 u8 DCDState;
142 u8 lineCtrl;
143 u8 lowChkFlag;
Jiri Slaby8f8ecba2007-02-10 01:45:33 -0800144};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145
Jiri Slaby74d7d972008-04-30 00:53:43 -0700146struct mon_str {
147 int tick;
148 int rxcnt[MAX_PORTS];
149 int txcnt[MAX_PORTS];
150};
151
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152/* statusflags */
153#define TXSTOPPED 0x1
154#define LOWWAIT 0x2
155#define EMPTYWAIT 0x4
156#define THROTTLE 0x8
157
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158#define SERIAL_DO_RESTART
159
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160#define WAKEUP_CHARS 256
161
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162static int ttymajor = MOXAMAJOR;
Jiri Slaby74d7d972008-04-30 00:53:43 -0700163static struct mon_str moxaLog;
164static unsigned int moxaFuncTout = HZ / 2;
Jiri Slaby7bcf97d2008-04-30 00:53:43 -0700165static unsigned int moxaLowWaterChk;
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700166static DEFINE_MUTEX(moxa_openlock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167/* Variables for insmod */
168#ifdef MODULE
Jiri Slabyd353eca2008-04-30 00:53:37 -0700169static unsigned long baseaddr[MAX_BOARDS];
170static unsigned int type[MAX_BOARDS];
171static unsigned int numports[MAX_BOARDS];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172#endif
173
174MODULE_AUTHOR("William Chen");
175MODULE_DESCRIPTION("MOXA Intellio Family Multiport Board Device Driver");
176MODULE_LICENSE("GPL");
177#ifdef MODULE
Jiri Slabyd353eca2008-04-30 00:53:37 -0700178module_param_array(type, uint, NULL, 0);
179MODULE_PARM_DESC(type, "card type: C218=2, C320=4");
180module_param_array(baseaddr, ulong, NULL, 0);
181MODULE_PARM_DESC(baseaddr, "base address");
182module_param_array(numports, uint, NULL, 0);
183MODULE_PARM_DESC(numports, "numports (ignored for C218)");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184#endif
185module_param(ttymajor, int, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187/*
188 * static functions:
189 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190static int moxa_open(struct tty_struct *, struct file *);
191static void moxa_close(struct tty_struct *, struct file *);
192static int moxa_write(struct tty_struct *, const unsigned char *, int);
193static int moxa_write_room(struct tty_struct *);
194static void moxa_flush_buffer(struct tty_struct *);
195static int moxa_chars_in_buffer(struct tty_struct *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196static void moxa_throttle(struct tty_struct *);
197static void moxa_unthrottle(struct tty_struct *);
Alan Cox606d0992006-12-08 02:38:45 -0800198static void moxa_set_termios(struct tty_struct *, struct ktermios *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199static void moxa_stop(struct tty_struct *);
200static void moxa_start(struct tty_struct *);
201static void moxa_hangup(struct tty_struct *);
202static int moxa_tiocmget(struct tty_struct *tty, struct file *file);
203static int moxa_tiocmset(struct tty_struct *tty, struct file *file,
204 unsigned int set, unsigned int clear);
205static void moxa_poll(unsigned long);
Alan Coxdb1acaa2008-02-08 04:18:43 -0800206static void moxa_set_tty_param(struct tty_struct *, struct ktermios *);
Jiri Slaby6f56b652007-10-18 03:06:24 -0700207static void moxa_setup_empty_event(struct tty_struct *);
Alan Coxd450b5a2008-10-13 10:39:58 +0100208static void moxa_shut_down(struct tty_struct *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209/*
210 * moxa board interface functions:
211 */
Jiri Slabyb4173f42008-04-30 00:53:40 -0700212static void MoxaPortEnable(struct moxa_port *);
213static void MoxaPortDisable(struct moxa_port *);
214static int MoxaPortSetTermio(struct moxa_port *, struct ktermios *, speed_t);
215static int MoxaPortGetLineOut(struct moxa_port *, int *, int *);
216static void MoxaPortLineCtrl(struct moxa_port *, int, int);
217static void MoxaPortFlowCtrl(struct moxa_port *, int, int, int, int, int);
218static int MoxaPortLineStatus(struct moxa_port *);
Jiri Slabyb4173f42008-04-30 00:53:40 -0700219static void MoxaPortFlushData(struct moxa_port *, int);
Alan Coxd450b5a2008-10-13 10:39:58 +0100220static int MoxaPortWriteData(struct tty_struct *, const unsigned char *, int);
Jiri Slaby7bcf97d2008-04-30 00:53:43 -0700221static int MoxaPortReadData(struct moxa_port *);
Jiri Slabyb4173f42008-04-30 00:53:40 -0700222static int MoxaPortTxQueue(struct moxa_port *);
223static int MoxaPortRxQueue(struct moxa_port *);
224static int MoxaPortTxFree(struct moxa_port *);
225static void MoxaPortTxDisable(struct moxa_port *);
226static void MoxaPortTxEnable(struct moxa_port *);
Jiri Slaby8f8ecba2007-02-10 01:45:33 -0800227static int moxa_get_serial_info(struct moxa_port *, struct serial_struct __user *);
228static int moxa_set_serial_info(struct moxa_port *, struct serial_struct __user *);
Jiri Slabyb4173f42008-04-30 00:53:40 -0700229static void MoxaSetFifo(struct moxa_port *port, int enable);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230
Jiri Slaby74d7d972008-04-30 00:53:43 -0700231/*
232 * I/O functions
233 */
234
235static void moxa_wait_finish(void __iomem *ofsAddr)
236{
237 unsigned long end = jiffies + moxaFuncTout;
238
239 while (readw(ofsAddr + FuncCode) != 0)
240 if (time_after(jiffies, end))
241 return;
242 if (readw(ofsAddr + FuncCode) != 0 && printk_ratelimit())
243 printk(KERN_WARNING "moxa function expired\n");
244}
245
Jiri Slabyeaa95a82008-04-30 00:53:46 -0700246static void moxafunc(void __iomem *ofsAddr, u16 cmd, u16 arg)
Jiri Slaby74d7d972008-04-30 00:53:43 -0700247{
248 writew(arg, ofsAddr + FuncArg);
249 writew(cmd, ofsAddr + FuncCode);
250 moxa_wait_finish(ofsAddr);
251}
252
Jiri Slaby7bcf97d2008-04-30 00:53:43 -0700253static void moxa_low_water_check(void __iomem *ofsAddr)
254{
255 u16 rptr, wptr, mask, len;
256
257 if (readb(ofsAddr + FlagStat) & Xoff_state) {
258 rptr = readw(ofsAddr + RXrptr);
259 wptr = readw(ofsAddr + RXwptr);
260 mask = readw(ofsAddr + RX_mask);
261 len = (wptr - rptr) & mask;
262 if (len <= Low_water)
263 moxafunc(ofsAddr, FC_SendXon, 0);
264 }
265}
266
Jiri Slaby74d7d972008-04-30 00:53:43 -0700267/*
268 * TTY operations
269 */
270
271static int moxa_ioctl(struct tty_struct *tty, struct file *file,
272 unsigned int cmd, unsigned long arg)
273{
274 struct moxa_port *ch = tty->driver_data;
275 void __user *argp = (void __user *)arg;
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700276 int status, ret = 0;
Jiri Slaby74d7d972008-04-30 00:53:43 -0700277
278 if (tty->index == MAX_PORTS) {
279 if (cmd != MOXA_GETDATACOUNT && cmd != MOXA_GET_IOQUEUE &&
280 cmd != MOXA_GETMSTATUS)
281 return -EINVAL;
282 } else if (!ch)
283 return -ENODEV;
284
285 switch (cmd) {
286 case MOXA_GETDATACOUNT:
287 moxaLog.tick = jiffies;
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700288 if (copy_to_user(argp, &moxaLog, sizeof(moxaLog)))
289 ret = -EFAULT;
290 break;
Jiri Slaby74d7d972008-04-30 00:53:43 -0700291 case MOXA_FLUSH_QUEUE:
292 MoxaPortFlushData(ch, arg);
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700293 break;
Jiri Slaby74d7d972008-04-30 00:53:43 -0700294 case MOXA_GET_IOQUEUE: {
295 struct moxaq_str __user *argm = argp;
296 struct moxaq_str tmp;
297 struct moxa_port *p;
298 unsigned int i, j;
299
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700300 mutex_lock(&moxa_openlock);
Jiri Slaby74d7d972008-04-30 00:53:43 -0700301 for (i = 0; i < MAX_BOARDS; i++) {
302 p = moxa_boards[i].ports;
303 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
304 memset(&tmp, 0, sizeof(tmp));
305 if (moxa_boards[i].ready) {
306 tmp.inq = MoxaPortRxQueue(p);
307 tmp.outq = MoxaPortTxQueue(p);
308 }
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700309 if (copy_to_user(argm, &tmp, sizeof(tmp))) {
310 mutex_unlock(&moxa_openlock);
Jiri Slaby74d7d972008-04-30 00:53:43 -0700311 return -EFAULT;
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700312 }
Jiri Slaby74d7d972008-04-30 00:53:43 -0700313 }
314 }
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700315 mutex_unlock(&moxa_openlock);
316 break;
Jiri Slaby74d7d972008-04-30 00:53:43 -0700317 } case MOXA_GET_OQUEUE:
318 status = MoxaPortTxQueue(ch);
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700319 ret = put_user(status, (unsigned long __user *)argp);
320 break;
Jiri Slaby74d7d972008-04-30 00:53:43 -0700321 case MOXA_GET_IQUEUE:
322 status = MoxaPortRxQueue(ch);
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700323 ret = put_user(status, (unsigned long __user *)argp);
324 break;
Jiri Slaby74d7d972008-04-30 00:53:43 -0700325 case MOXA_GETMSTATUS: {
326 struct mxser_mstatus __user *argm = argp;
327 struct mxser_mstatus tmp;
328 struct moxa_port *p;
329 unsigned int i, j;
330
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700331 mutex_lock(&moxa_openlock);
Jiri Slaby74d7d972008-04-30 00:53:43 -0700332 for (i = 0; i < MAX_BOARDS; i++) {
333 p = moxa_boards[i].ports;
334 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
Alan Coxd450b5a2008-10-13 10:39:58 +0100335 struct tty_struct *ttyp;
Jiri Slaby74d7d972008-04-30 00:53:43 -0700336 memset(&tmp, 0, sizeof(tmp));
337 if (!moxa_boards[i].ready)
338 goto copy;
339
340 status = MoxaPortLineStatus(p);
341 if (status & 1)
342 tmp.cts = 1;
343 if (status & 2)
344 tmp.dsr = 1;
345 if (status & 4)
346 tmp.dcd = 1;
347
Alan Coxd450b5a2008-10-13 10:39:58 +0100348 ttyp = tty_port_tty_get(&p->port);
349 if (!ttyp || !ttyp->termios)
Jiri Slaby74d7d972008-04-30 00:53:43 -0700350 tmp.cflag = p->cflag;
351 else
Alan Coxd450b5a2008-10-13 10:39:58 +0100352 tmp.cflag = ttyp->termios->c_cflag;
353 tty_kref_put(tty);
Jiri Slaby74d7d972008-04-30 00:53:43 -0700354copy:
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700355 if (copy_to_user(argm, &tmp, sizeof(tmp))) {
356 mutex_unlock(&moxa_openlock);
Jiri Slaby74d7d972008-04-30 00:53:43 -0700357 return -EFAULT;
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700358 }
Jiri Slaby74d7d972008-04-30 00:53:43 -0700359 }
360 }
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700361 mutex_unlock(&moxa_openlock);
362 break;
Jiri Slaby74d7d972008-04-30 00:53:43 -0700363 }
364 case TIOCGSERIAL:
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700365 mutex_lock(&moxa_openlock);
366 ret = moxa_get_serial_info(ch, argp);
367 mutex_unlock(&moxa_openlock);
368 break;
Jiri Slaby74d7d972008-04-30 00:53:43 -0700369 case TIOCSSERIAL:
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700370 mutex_lock(&moxa_openlock);
371 ret = moxa_set_serial_info(ch, argp);
372 mutex_unlock(&moxa_openlock);
373 break;
374 default:
375 ret = -ENOIOCTLCMD;
Jiri Slaby74d7d972008-04-30 00:53:43 -0700376 }
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700377 return ret;
Jiri Slaby74d7d972008-04-30 00:53:43 -0700378}
379
Alan Cox9e989662008-07-22 11:18:03 +0100380static int moxa_break_ctl(struct tty_struct *tty, int state)
Jiri Slaby74d7d972008-04-30 00:53:43 -0700381{
382 struct moxa_port *port = tty->driver_data;
383
384 moxafunc(port->tableAddr, state ? FC_SendBreak : FC_StopBreak,
385 Magic_code);
Alan Cox9e989662008-07-22 11:18:03 +0100386 return 0;
Jiri Slaby74d7d972008-04-30 00:53:43 -0700387}
388
Jeff Dikeb68e31d2006-10-02 02:17:18 -0700389static const struct tty_operations moxa_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390 .open = moxa_open,
391 .close = moxa_close,
392 .write = moxa_write,
393 .write_room = moxa_write_room,
394 .flush_buffer = moxa_flush_buffer,
395 .chars_in_buffer = moxa_chars_in_buffer,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396 .ioctl = moxa_ioctl,
397 .throttle = moxa_throttle,
398 .unthrottle = moxa_unthrottle,
399 .set_termios = moxa_set_termios,
400 .stop = moxa_stop,
401 .start = moxa_start,
402 .hangup = moxa_hangup,
Jiri Slaby74d7d972008-04-30 00:53:43 -0700403 .break_ctl = moxa_break_ctl,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404 .tiocmget = moxa_tiocmget,
405 .tiocmset = moxa_tiocmset,
406};
407
Jiri Slabyaa7e5222007-02-10 01:45:27 -0800408static struct tty_driver *moxaDriver;
Jiri Slabyaa7e5222007-02-10 01:45:27 -0800409static DEFINE_TIMER(moxaTimer, moxa_poll, 0, 0);
Ingo Molnar34af9462006-06-27 02:53:55 -0700410static DEFINE_SPINLOCK(moxa_lock);
Alan Cox33f0f882006-01-09 20:54:13 -0800411
Jiri Slaby74d7d972008-04-30 00:53:43 -0700412/*
413 * HW init
414 */
415
Jiri Slaby03718232008-04-30 00:53:39 -0700416static int moxa_check_fw_model(struct moxa_board_conf *brd, u8 model)
417{
418 switch (brd->boardType) {
419 case MOXA_BOARD_C218_ISA:
420 case MOXA_BOARD_C218_PCI:
421 if (model != 1)
422 goto err;
423 break;
424 case MOXA_BOARD_CP204J:
425 if (model != 3)
426 goto err;
427 break;
428 default:
429 if (model != 2)
430 goto err;
431 break;
432 }
433 return 0;
434err:
435 return -EINVAL;
436}
437
438static int moxa_check_fw(const void *ptr)
439{
440 const __le16 *lptr = ptr;
441
442 if (*lptr != cpu_to_le16(0x7980))
443 return -EINVAL;
444
445 return 0;
446}
447
448static int moxa_load_bios(struct moxa_board_conf *brd, const u8 *buf,
449 size_t len)
450{
451 void __iomem *baseAddr = brd->basemem;
452 u16 tmp;
453
454 writeb(HW_reset, baseAddr + Control_reg); /* reset */
455 msleep(10);
456 memset_io(baseAddr, 0, 4096);
457 memcpy_toio(baseAddr, buf, len); /* download BIOS */
458 writeb(0, baseAddr + Control_reg); /* restart */
459
460 msleep(2000);
461
462 switch (brd->boardType) {
463 case MOXA_BOARD_C218_ISA:
464 case MOXA_BOARD_C218_PCI:
465 tmp = readw(baseAddr + C218_key);
466 if (tmp != C218_KeyCode)
467 goto err;
468 break;
469 case MOXA_BOARD_CP204J:
470 tmp = readw(baseAddr + C218_key);
471 if (tmp != CP204J_KeyCode)
472 goto err;
473 break;
474 default:
475 tmp = readw(baseAddr + C320_key);
476 if (tmp != C320_KeyCode)
477 goto err;
478 tmp = readw(baseAddr + C320_status);
479 if (tmp != STS_init) {
Jiri Slabyeaa95a82008-04-30 00:53:46 -0700480 printk(KERN_ERR "MOXA: bios upload failed -- CPU/Basic "
Jiri Slaby03718232008-04-30 00:53:39 -0700481 "module not found\n");
482 return -EIO;
483 }
484 break;
485 }
486
487 return 0;
488err:
Jiri Slabyeaa95a82008-04-30 00:53:46 -0700489 printk(KERN_ERR "MOXA: bios upload failed -- board not found\n");
Jiri Slaby03718232008-04-30 00:53:39 -0700490 return -EIO;
491}
492
493static int moxa_load_320b(struct moxa_board_conf *brd, const u8 *ptr,
494 size_t len)
495{
496 void __iomem *baseAddr = brd->basemem;
497
498 if (len < 7168) {
Jiri Slabyeaa95a82008-04-30 00:53:46 -0700499 printk(KERN_ERR "MOXA: invalid 320 bios -- too short\n");
Jiri Slaby03718232008-04-30 00:53:39 -0700500 return -EINVAL;
501 }
502
503 writew(len - 7168 - 2, baseAddr + C320bapi_len);
504 writeb(1, baseAddr + Control_reg); /* Select Page 1 */
505 memcpy_toio(baseAddr + DynPage_addr, ptr, 7168);
506 writeb(2, baseAddr + Control_reg); /* Select Page 2 */
507 memcpy_toio(baseAddr + DynPage_addr, ptr + 7168, len - 7168);
508
509 return 0;
510}
511
Jiri Slaby5292bcd2008-04-30 00:53:39 -0700512static int moxa_real_load_code(struct moxa_board_conf *brd, const void *ptr,
Jiri Slaby03718232008-04-30 00:53:39 -0700513 size_t len)
514{
515 void __iomem *baseAddr = brd->basemem;
Harvey Harrisonb46f69c2008-10-15 22:04:19 -0700516 const __le16 *uptr = ptr;
Jiri Slaby03718232008-04-30 00:53:39 -0700517 size_t wlen, len2, j;
Jiri Slaby5292bcd2008-04-30 00:53:39 -0700518 unsigned long key, loadbuf, loadlen, checksum, checksum_ok;
Jiri Slaby08d01c72008-04-30 00:53:47 -0700519 unsigned int i, retry;
Jiri Slaby03718232008-04-30 00:53:39 -0700520 u16 usum, keycode;
521
Jiri Slaby5292bcd2008-04-30 00:53:39 -0700522 keycode = (brd->boardType == MOXA_BOARD_CP204J) ? CP204J_KeyCode :
523 C218_KeyCode;
524
525 switch (brd->boardType) {
526 case MOXA_BOARD_CP204J:
527 case MOXA_BOARD_C218_ISA:
528 case MOXA_BOARD_C218_PCI:
529 key = C218_key;
530 loadbuf = C218_LoadBuf;
531 loadlen = C218DLoad_len;
532 checksum = C218check_sum;
533 checksum_ok = C218chksum_ok;
534 break;
535 default:
536 key = C320_key;
537 keycode = C320_KeyCode;
538 loadbuf = C320_LoadBuf;
539 loadlen = C320DLoad_len;
540 checksum = C320check_sum;
541 checksum_ok = C320chksum_ok;
542 break;
543 }
544
Jiri Slaby03718232008-04-30 00:53:39 -0700545 usum = 0;
546 wlen = len >> 1;
547 for (i = 0; i < wlen; i++)
548 usum += le16_to_cpu(uptr[i]);
549 retry = 0;
550 do {
551 wlen = len >> 1;
552 j = 0;
553 while (wlen) {
554 len2 = (wlen > 2048) ? 2048 : wlen;
555 wlen -= len2;
Jiri Slaby5292bcd2008-04-30 00:53:39 -0700556 memcpy_toio(baseAddr + loadbuf, ptr + j, len2 << 1);
Jiri Slaby03718232008-04-30 00:53:39 -0700557 j += len2 << 1;
558
Jiri Slaby5292bcd2008-04-30 00:53:39 -0700559 writew(len2, baseAddr + loadlen);
560 writew(0, baseAddr + key);
Jiri Slaby03718232008-04-30 00:53:39 -0700561 for (i = 0; i < 100; i++) {
Jiri Slaby5292bcd2008-04-30 00:53:39 -0700562 if (readw(baseAddr + key) == keycode)
Jiri Slaby03718232008-04-30 00:53:39 -0700563 break;
564 msleep(10);
565 }
Jiri Slaby5292bcd2008-04-30 00:53:39 -0700566 if (readw(baseAddr + key) != keycode)
Jiri Slaby03718232008-04-30 00:53:39 -0700567 return -EIO;
568 }
Jiri Slaby5292bcd2008-04-30 00:53:39 -0700569 writew(0, baseAddr + loadlen);
570 writew(usum, baseAddr + checksum);
571 writew(0, baseAddr + key);
Jiri Slaby03718232008-04-30 00:53:39 -0700572 for (i = 0; i < 100; i++) {
Jiri Slaby5292bcd2008-04-30 00:53:39 -0700573 if (readw(baseAddr + key) == keycode)
Jiri Slaby03718232008-04-30 00:53:39 -0700574 break;
575 msleep(10);
576 }
577 retry++;
Jiri Slaby5292bcd2008-04-30 00:53:39 -0700578 } while ((readb(baseAddr + checksum_ok) != 1) && (retry < 3));
579 if (readb(baseAddr + checksum_ok) != 1)
Jiri Slaby03718232008-04-30 00:53:39 -0700580 return -EIO;
581
Jiri Slaby5292bcd2008-04-30 00:53:39 -0700582 writew(0, baseAddr + key);
Jiri Slaby03718232008-04-30 00:53:39 -0700583 for (i = 0; i < 600; i++) {
584 if (readw(baseAddr + Magic_no) == Magic_code)
585 break;
586 msleep(10);
587 }
588 if (readw(baseAddr + Magic_no) != Magic_code)
589 return -EIO;
590
Jiri Slaby08d01c72008-04-30 00:53:47 -0700591 if (MOXA_IS_320(brd)) {
Jiri Slaby5292bcd2008-04-30 00:53:39 -0700592 if (brd->busType == MOXA_BUS_TYPE_PCI) { /* ASIC board */
593 writew(0x3800, baseAddr + TMS320_PORT1);
594 writew(0x3900, baseAddr + TMS320_PORT2);
595 writew(28499, baseAddr + TMS320_CLOCK);
596 } else {
597 writew(0x3200, baseAddr + TMS320_PORT1);
598 writew(0x3400, baseAddr + TMS320_PORT2);
599 writew(19999, baseAddr + TMS320_CLOCK);
600 }
Jiri Slaby03718232008-04-30 00:53:39 -0700601 }
602 writew(1, baseAddr + Disable_IRQ);
603 writew(0, baseAddr + Magic_no);
604 for (i = 0; i < 500; i++) {
605 if (readw(baseAddr + Magic_no) == Magic_code)
606 break;
607 msleep(10);
608 }
609 if (readw(baseAddr + Magic_no) != Magic_code)
610 return -EIO;
611
Jiri Slaby08d01c72008-04-30 00:53:47 -0700612 if (MOXA_IS_320(brd)) {
Jiri Slaby5292bcd2008-04-30 00:53:39 -0700613 j = readw(baseAddr + Module_cnt);
614 if (j <= 0)
615 return -EIO;
616 brd->numPorts = j * 8;
617 writew(j, baseAddr + Module_no);
618 writew(0, baseAddr + Magic_no);
619 for (i = 0; i < 600; i++) {
620 if (readw(baseAddr + Magic_no) == Magic_code)
621 break;
622 msleep(10);
623 }
624 if (readw(baseAddr + Magic_no) != Magic_code)
625 return -EIO;
Jiri Slaby03718232008-04-30 00:53:39 -0700626 }
Jiri Slaby03718232008-04-30 00:53:39 -0700627 brd->intNdx = baseAddr + IRQindex;
628 brd->intPend = baseAddr + IRQpending;
629 brd->intTable = baseAddr + IRQtable;
630
631 return 0;
632}
633
634static int moxa_load_code(struct moxa_board_conf *brd, const void *ptr,
635 size_t len)
636{
637 void __iomem *ofsAddr, *baseAddr = brd->basemem;
638 struct moxa_port *port;
639 int retval, i;
640
641 if (len % 2) {
Jiri Slabyeaa95a82008-04-30 00:53:46 -0700642 printk(KERN_ERR "MOXA: bios length is not even\n");
Jiri Slaby03718232008-04-30 00:53:39 -0700643 return -EINVAL;
644 }
645
Jiri Slaby5292bcd2008-04-30 00:53:39 -0700646 retval = moxa_real_load_code(brd, ptr, len); /* may change numPorts */
647 if (retval)
648 return retval;
649
Jiri Slaby03718232008-04-30 00:53:39 -0700650 switch (brd->boardType) {
651 case MOXA_BOARD_C218_ISA:
652 case MOXA_BOARD_C218_PCI:
653 case MOXA_BOARD_CP204J:
Jiri Slaby03718232008-04-30 00:53:39 -0700654 port = brd->ports;
655 for (i = 0; i < brd->numPorts; i++, port++) {
Jiri Slabyb4173f42008-04-30 00:53:40 -0700656 port->board = brd;
Jiri Slaby03718232008-04-30 00:53:39 -0700657 port->DCDState = 0;
658 port->tableAddr = baseAddr + Extern_table +
659 Extern_size * i;
660 ofsAddr = port->tableAddr;
661 writew(C218rx_mask, ofsAddr + RX_mask);
662 writew(C218tx_mask, ofsAddr + TX_mask);
663 writew(C218rx_spage + i * C218buf_pageno, ofsAddr + Page_rxb);
664 writew(readw(ofsAddr + Page_rxb) + C218rx_pageno, ofsAddr + EndPage_rxb);
665
666 writew(C218tx_spage + i * C218buf_pageno, ofsAddr + Page_txb);
667 writew(readw(ofsAddr + Page_txb) + C218tx_pageno, ofsAddr + EndPage_txb);
668
669 }
670 break;
671 default:
Jiri Slaby03718232008-04-30 00:53:39 -0700672 port = brd->ports;
673 for (i = 0; i < brd->numPorts; i++, port++) {
Jiri Slabyb4173f42008-04-30 00:53:40 -0700674 port->board = brd;
Jiri Slaby03718232008-04-30 00:53:39 -0700675 port->DCDState = 0;
676 port->tableAddr = baseAddr + Extern_table +
677 Extern_size * i;
678 ofsAddr = port->tableAddr;
679 switch (brd->numPorts) {
680 case 8:
681 writew(C320p8rx_mask, ofsAddr + RX_mask);
682 writew(C320p8tx_mask, ofsAddr + TX_mask);
683 writew(C320p8rx_spage + i * C320p8buf_pgno, ofsAddr + Page_rxb);
684 writew(readw(ofsAddr + Page_rxb) + C320p8rx_pgno, ofsAddr + EndPage_rxb);
685 writew(C320p8tx_spage + i * C320p8buf_pgno, ofsAddr + Page_txb);
686 writew(readw(ofsAddr + Page_txb) + C320p8tx_pgno, ofsAddr + EndPage_txb);
687
688 break;
689 case 16:
690 writew(C320p16rx_mask, ofsAddr + RX_mask);
691 writew(C320p16tx_mask, ofsAddr + TX_mask);
692 writew(C320p16rx_spage + i * C320p16buf_pgno, ofsAddr + Page_rxb);
693 writew(readw(ofsAddr + Page_rxb) + C320p16rx_pgno, ofsAddr + EndPage_rxb);
694 writew(C320p16tx_spage + i * C320p16buf_pgno, ofsAddr + Page_txb);
695 writew(readw(ofsAddr + Page_txb) + C320p16tx_pgno, ofsAddr + EndPage_txb);
696 break;
697
698 case 24:
699 writew(C320p24rx_mask, ofsAddr + RX_mask);
700 writew(C320p24tx_mask, ofsAddr + TX_mask);
701 writew(C320p24rx_spage + i * C320p24buf_pgno, ofsAddr + Page_rxb);
702 writew(readw(ofsAddr + Page_rxb) + C320p24rx_pgno, ofsAddr + EndPage_rxb);
703 writew(C320p24tx_spage + i * C320p24buf_pgno, ofsAddr + Page_txb);
704 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
705 break;
706 case 32:
707 writew(C320p32rx_mask, ofsAddr + RX_mask);
708 writew(C320p32tx_mask, ofsAddr + TX_mask);
709 writew(C320p32tx_ofs, ofsAddr + Ofs_txb);
710 writew(C320p32rx_spage + i * C320p32buf_pgno, ofsAddr + Page_rxb);
711 writew(readb(ofsAddr + Page_rxb), ofsAddr + EndPage_rxb);
712 writew(C320p32tx_spage + i * C320p32buf_pgno, ofsAddr + Page_txb);
713 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
714 break;
715 }
716 }
717 break;
718 }
Jiri Slaby03718232008-04-30 00:53:39 -0700719 return 0;
720}
721
722static int moxa_load_fw(struct moxa_board_conf *brd, const struct firmware *fw)
723{
David Howells2bca76e2008-07-08 17:37:15 +0100724 const void *ptr = fw->data;
Jiri Slaby03718232008-04-30 00:53:39 -0700725 char rsn[64];
726 u16 lens[5];
727 size_t len;
728 unsigned int a, lenp, lencnt;
729 int ret = -EINVAL;
730 struct {
731 __le32 magic; /* 0x34303430 */
732 u8 reserved1[2];
733 u8 type; /* UNIX = 3 */
734 u8 model; /* C218T=1, C320T=2, CP204=3 */
735 u8 reserved2[8];
736 __le16 len[5];
David Howells2bca76e2008-07-08 17:37:15 +0100737 } const *hdr = ptr;
Jiri Slaby03718232008-04-30 00:53:39 -0700738
739 BUILD_BUG_ON(ARRAY_SIZE(hdr->len) != ARRAY_SIZE(lens));
740
741 if (fw->size < MOXA_FW_HDRLEN) {
742 strcpy(rsn, "too short (even header won't fit)");
743 goto err;
744 }
745 if (hdr->magic != cpu_to_le32(0x30343034)) {
746 sprintf(rsn, "bad magic: %.8x", le32_to_cpu(hdr->magic));
747 goto err;
748 }
749 if (hdr->type != 3) {
750 sprintf(rsn, "not for linux, type is %u", hdr->type);
751 goto err;
752 }
753 if (moxa_check_fw_model(brd, hdr->model)) {
754 sprintf(rsn, "not for this card, model is %u", hdr->model);
755 goto err;
756 }
757
758 len = MOXA_FW_HDRLEN;
759 lencnt = hdr->model == 2 ? 5 : 3;
760 for (a = 0; a < ARRAY_SIZE(lens); a++) {
761 lens[a] = le16_to_cpu(hdr->len[a]);
762 if (lens[a] && len + lens[a] <= fw->size &&
763 moxa_check_fw(&fw->data[len]))
Jiri Slabyeaa95a82008-04-30 00:53:46 -0700764 printk(KERN_WARNING "MOXA firmware: unexpected input "
Jiri Slaby03718232008-04-30 00:53:39 -0700765 "at offset %u, but going on\n", (u32)len);
766 if (!lens[a] && a < lencnt) {
767 sprintf(rsn, "too few entries in fw file");
768 goto err;
769 }
770 len += lens[a];
771 }
772
773 if (len != fw->size) {
774 sprintf(rsn, "bad length: %u (should be %u)", (u32)fw->size,
775 (u32)len);
776 goto err;
777 }
778
779 ptr += MOXA_FW_HDRLEN;
780 lenp = 0; /* bios */
781
782 strcpy(rsn, "read above");
783
784 ret = moxa_load_bios(brd, ptr, lens[lenp]);
785 if (ret)
786 goto err;
787
788 /* we skip the tty section (lens[1]), since we don't need it */
789 ptr += lens[lenp] + lens[lenp + 1];
790 lenp += 2; /* comm */
791
792 if (hdr->model == 2) {
793 ret = moxa_load_320b(brd, ptr, lens[lenp]);
794 if (ret)
795 goto err;
796 /* skip another tty */
797 ptr += lens[lenp] + lens[lenp + 1];
798 lenp += 2;
799 }
800
801 ret = moxa_load_code(brd, ptr, lens[lenp]);
802 if (ret)
803 goto err;
804
805 return 0;
806err:
807 printk(KERN_ERR "firmware failed to load, reason: %s\n", rsn);
808 return ret;
809}
810
811static int moxa_init_board(struct moxa_board_conf *brd, struct device *dev)
812{
813 const struct firmware *fw;
814 const char *file;
Jiri Slaby810ab092008-04-30 00:53:41 -0700815 struct moxa_port *p;
816 unsigned int i;
Jiri Slaby03718232008-04-30 00:53:39 -0700817 int ret;
818
Jiri Slaby810ab092008-04-30 00:53:41 -0700819 brd->ports = kcalloc(MAX_PORTS_PER_BOARD, sizeof(*brd->ports),
820 GFP_KERNEL);
821 if (brd->ports == NULL) {
822 printk(KERN_ERR "cannot allocate memory for ports\n");
823 ret = -ENOMEM;
824 goto err;
825 }
826
827 for (i = 0, p = brd->ports; i < MAX_PORTS_PER_BOARD; i++, p++) {
Alan Cox9de6a512008-07-16 21:56:02 +0100828 tty_port_init(&p->port);
Alan Cox44b7d1b2008-07-16 21:57:18 +0100829 p->type = PORT_16550A;
830 p->cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
Jiri Slaby810ab092008-04-30 00:53:41 -0700831 }
832
Jiri Slaby03718232008-04-30 00:53:39 -0700833 switch (brd->boardType) {
834 case MOXA_BOARD_C218_ISA:
835 case MOXA_BOARD_C218_PCI:
836 file = "c218tunx.cod";
837 break;
838 case MOXA_BOARD_CP204J:
839 file = "cp204unx.cod";
840 break;
841 default:
842 file = "c320tunx.cod";
843 break;
844 }
845
846 ret = request_firmware(&fw, file, dev);
847 if (ret) {
Jiri Slabyec09cd52008-04-30 00:53:49 -0700848 printk(KERN_ERR "MOXA: request_firmware failed. Make sure "
849 "you've placed '%s' file into your firmware "
850 "loader directory (e.g. /lib/firmware)\n",
851 file);
Jiri Slaby810ab092008-04-30 00:53:41 -0700852 goto err_free;
Jiri Slaby03718232008-04-30 00:53:39 -0700853 }
854
855 ret = moxa_load_fw(brd, fw);
856
857 release_firmware(fw);
Jiri Slaby810ab092008-04-30 00:53:41 -0700858
859 if (ret)
860 goto err_free;
861
Jiri Slaby2a541342008-04-30 00:53:45 -0700862 spin_lock_bh(&moxa_lock);
Jiri Slaby810ab092008-04-30 00:53:41 -0700863 brd->ready = 1;
Jiri Slaby0bcc4ca2008-04-30 00:53:42 -0700864 if (!timer_pending(&moxaTimer))
865 mod_timer(&moxaTimer, jiffies + HZ / 50);
Jiri Slaby2a541342008-04-30 00:53:45 -0700866 spin_unlock_bh(&moxa_lock);
Jiri Slaby0bcc4ca2008-04-30 00:53:42 -0700867
Jiri Slaby810ab092008-04-30 00:53:41 -0700868 return 0;
869err_free:
870 kfree(brd->ports);
871err:
Jiri Slaby03718232008-04-30 00:53:39 -0700872 return ret;
873}
874
Jiri Slaby810ab092008-04-30 00:53:41 -0700875static void moxa_board_deinit(struct moxa_board_conf *brd)
876{
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700877 unsigned int a, opened;
878
879 mutex_lock(&moxa_openlock);
Jiri Slaby7bcf97d2008-04-30 00:53:43 -0700880 spin_lock_bh(&moxa_lock);
Jiri Slaby810ab092008-04-30 00:53:41 -0700881 brd->ready = 0;
Jiri Slaby7bcf97d2008-04-30 00:53:43 -0700882 spin_unlock_bh(&moxa_lock);
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700883
884 /* pci hot-un-plug support */
885 for (a = 0; a < brd->numPorts; a++)
Alan Coxd450b5a2008-10-13 10:39:58 +0100886 if (brd->ports[a].port.flags & ASYNC_INITIALIZED) {
887 struct tty_struct *tty = tty_port_tty_get(
888 &brd->ports[a].port);
889 if (tty) {
890 tty_hangup(tty);
891 tty_kref_put(tty);
892 }
893 }
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700894 while (1) {
895 opened = 0;
896 for (a = 0; a < brd->numPorts; a++)
Alan Cox9de6a512008-07-16 21:56:02 +0100897 if (brd->ports[a].port.flags & ASYNC_INITIALIZED)
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700898 opened++;
899 mutex_unlock(&moxa_openlock);
900 if (!opened)
901 break;
902 msleep(50);
903 mutex_lock(&moxa_openlock);
904 }
905
Jiri Slaby810ab092008-04-30 00:53:41 -0700906 iounmap(brd->basemem);
907 brd->basemem = NULL;
908 kfree(brd->ports);
909}
910
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911#ifdef CONFIG_PCI
Jiri Slaby9cde5bf2007-02-10 01:45:35 -0800912static int __devinit moxa_pci_probe(struct pci_dev *pdev,
913 const struct pci_device_id *ent)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700914{
Jiri Slaby9cde5bf2007-02-10 01:45:35 -0800915 struct moxa_board_conf *board;
916 unsigned int i;
917 int board_type = ent->driver_data;
918 int retval;
919
920 retval = pci_enable_device(pdev);
Jiri Slaby7aeb95d2007-10-18 03:06:24 -0700921 if (retval) {
922 dev_err(&pdev->dev, "can't enable pci device\n");
Jiri Slaby9cde5bf2007-02-10 01:45:35 -0800923 goto err;
Jiri Slaby7aeb95d2007-10-18 03:06:24 -0700924 }
Jiri Slaby9cde5bf2007-02-10 01:45:35 -0800925
926 for (i = 0; i < MAX_BOARDS; i++)
927 if (moxa_boards[i].basemem == NULL)
928 break;
929
930 retval = -ENODEV;
931 if (i >= MAX_BOARDS) {
Jiri Slaby7aeb95d2007-10-18 03:06:24 -0700932 dev_warn(&pdev->dev, "more than %u MOXA Intellio family boards "
Jiri Slaby9cde5bf2007-02-10 01:45:35 -0800933 "found. Board is ignored.\n", MAX_BOARDS);
934 goto err;
935 }
936
937 board = &moxa_boards[i];
Jiri Slabye46a5e32008-04-30 00:53:37 -0700938
939 retval = pci_request_region(pdev, 2, "moxa-base");
940 if (retval) {
941 dev_err(&pdev->dev, "can't request pci region 2\n");
942 goto err;
943 }
944
Alan Cox24cb2332008-04-30 00:54:19 -0700945 board->basemem = ioremap_nocache(pci_resource_start(pdev, 2), 0x4000);
Jiri Slaby7aeb95d2007-10-18 03:06:24 -0700946 if (board->basemem == NULL) {
947 dev_err(&pdev->dev, "can't remap io space 2\n");
Jiri Slabye46a5e32008-04-30 00:53:37 -0700948 goto err_reg;
Jiri Slaby7aeb95d2007-10-18 03:06:24 -0700949 }
Jiri Slaby9cde5bf2007-02-10 01:45:35 -0800950
Linus Torvalds1da177e2005-04-16 15:20:36 -0700951 board->boardType = board_type;
952 switch (board_type) {
953 case MOXA_BOARD_C218_ISA:
954 case MOXA_BOARD_C218_PCI:
955 board->numPorts = 8;
956 break;
957
958 case MOXA_BOARD_CP204J:
959 board->numPorts = 4;
960 break;
961 default:
962 board->numPorts = 0;
963 break;
964 }
965 board->busType = MOXA_BUS_TYPE_PCI;
Jiri Slabya784bf72007-02-10 01:45:36 -0800966
Jiri Slaby03718232008-04-30 00:53:39 -0700967 retval = moxa_init_board(board, &pdev->dev);
968 if (retval)
969 goto err_base;
970
Jiri Slaby9cde5bf2007-02-10 01:45:35 -0800971 pci_set_drvdata(pdev, board);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700972
Jiri Slabybb9f9102008-04-30 00:53:48 -0700973 dev_info(&pdev->dev, "board '%s' ready (%u ports, firmware loaded)\n",
974 moxa_brdname[board_type - 1], board->numPorts);
975
Jiri Slabyeaa95a82008-04-30 00:53:46 -0700976 return 0;
Jiri Slaby03718232008-04-30 00:53:39 -0700977err_base:
978 iounmap(board->basemem);
979 board->basemem = NULL;
Jiri Slabye46a5e32008-04-30 00:53:37 -0700980err_reg:
981 pci_release_region(pdev, 2);
Jiri Slaby9cde5bf2007-02-10 01:45:35 -0800982err:
983 return retval;
984}
985
986static void __devexit moxa_pci_remove(struct pci_dev *pdev)
987{
988 struct moxa_board_conf *brd = pci_get_drvdata(pdev);
989
Jiri Slaby810ab092008-04-30 00:53:41 -0700990 moxa_board_deinit(brd);
991
Jiri Slabye46a5e32008-04-30 00:53:37 -0700992 pci_release_region(pdev, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700993}
Jiri Slabya784bf72007-02-10 01:45:36 -0800994
995static struct pci_driver moxa_pci_driver = {
996 .name = "moxa",
997 .id_table = moxa_pcibrds,
998 .probe = moxa_pci_probe,
999 .remove = __devexit_p(moxa_pci_remove)
1000};
Linus Torvalds1da177e2005-04-16 15:20:36 -07001001#endif /* CONFIG_PCI */
1002
1003static int __init moxa_init(void)
1004{
Jiri Slaby810ab092008-04-30 00:53:41 -07001005 unsigned int isabrds = 0;
Jiri Slabyd353eca2008-04-30 00:53:37 -07001006 int retval = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001007
Jiri Slaby7aeb95d2007-10-18 03:06:24 -07001008 printk(KERN_INFO "MOXA Intellio family driver version %s\n",
1009 MOXA_VERSION);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001010 moxaDriver = alloc_tty_driver(MAX_PORTS + 1);
1011 if (!moxaDriver)
1012 return -ENOMEM;
1013
Linus Torvalds1da177e2005-04-16 15:20:36 -07001014 moxaDriver->owner = THIS_MODULE;
Sergey Vlasov9b4e3b12005-09-03 16:26:49 +01001015 moxaDriver->name = "ttyMX";
Linus Torvalds1da177e2005-04-16 15:20:36 -07001016 moxaDriver->major = ttymajor;
1017 moxaDriver->minor_start = 0;
1018 moxaDriver->type = TTY_DRIVER_TYPE_SERIAL;
1019 moxaDriver->subtype = SERIAL_TYPE_NORMAL;
1020 moxaDriver->init_termios = tty_std_termios;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001021 moxaDriver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
Alan Cox606d0992006-12-08 02:38:45 -08001022 moxaDriver->init_termios.c_ispeed = 9600;
1023 moxaDriver->init_termios.c_ospeed = 9600;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001024 moxaDriver->flags = TTY_DRIVER_REAL_RAW;
1025 tty_set_operations(moxaDriver, &moxa_ops);
1026
Linus Torvalds1da177e2005-04-16 15:20:36 -07001027 if (tty_register_driver(moxaDriver)) {
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001028 printk(KERN_ERR "can't register MOXA Smartio tty driver!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001029 put_tty_driver(moxaDriver);
1030 return -1;
1031 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001032
Jiri Slabyd353eca2008-04-30 00:53:37 -07001033 /* Find the boards defined from module args. */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001034#ifdef MODULE
Jiri Slabyd353eca2008-04-30 00:53:37 -07001035 {
1036 struct moxa_board_conf *brd = moxa_boards;
Jiri Slaby810ab092008-04-30 00:53:41 -07001037 unsigned int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038 for (i = 0; i < MAX_BOARDS; i++) {
Jiri Slabyd353eca2008-04-30 00:53:37 -07001039 if (!baseaddr[i])
1040 break;
1041 if (type[i] == MOXA_BOARD_C218_ISA ||
1042 type[i] == MOXA_BOARD_C320_ISA) {
Jiri Slaby7aeb95d2007-10-18 03:06:24 -07001043 pr_debug("Moxa board %2d: %s board(baseAddr=%lx)\n",
Jiri Slabyd353eca2008-04-30 00:53:37 -07001044 isabrds + 1, moxa_brdname[type[i] - 1],
1045 baseaddr[i]);
1046 brd->boardType = type[i];
1047 brd->numPorts = type[i] == MOXA_BOARD_C218_ISA ? 8 :
1048 numports[i];
1049 brd->busType = MOXA_BUS_TYPE_ISA;
Alan Cox24cb2332008-04-30 00:54:19 -07001050 brd->basemem = ioremap_nocache(baseaddr[i], 0x4000);
Jiri Slabyd353eca2008-04-30 00:53:37 -07001051 if (!brd->basemem) {
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001052 printk(KERN_ERR "MOXA: can't remap %lx\n",
Jiri Slabyd353eca2008-04-30 00:53:37 -07001053 baseaddr[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001054 continue;
1055 }
Jiri Slaby03718232008-04-30 00:53:39 -07001056 if (moxa_init_board(brd, NULL)) {
1057 iounmap(brd->basemem);
1058 brd->basemem = NULL;
1059 continue;
1060 }
Jiri Slabyd353eca2008-04-30 00:53:37 -07001061
Jiri Slabybb9f9102008-04-30 00:53:48 -07001062 printk(KERN_INFO "MOXA isa board found at 0x%.8lu and "
1063 "ready (%u ports, firmware loaded)\n",
1064 baseaddr[i], brd->numPorts);
1065
Jiri Slabyd353eca2008-04-30 00:53:37 -07001066 brd++;
1067 isabrds++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001068 }
1069 }
Jiri Slabyd353eca2008-04-30 00:53:37 -07001070 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001071#endif
Jiri Slabya784bf72007-02-10 01:45:36 -08001072
Linus Torvalds1da177e2005-04-16 15:20:36 -07001073#ifdef CONFIG_PCI
Jiri Slabya784bf72007-02-10 01:45:36 -08001074 retval = pci_register_driver(&moxa_pci_driver);
1075 if (retval) {
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001076 printk(KERN_ERR "Can't register MOXA pci driver!\n");
Jiri Slabyd353eca2008-04-30 00:53:37 -07001077 if (isabrds)
Jiri Slabya784bf72007-02-10 01:45:36 -08001078 retval = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001079 }
1080#endif
Jiri Slabya784bf72007-02-10 01:45:36 -08001081
Jiri Slabya784bf72007-02-10 01:45:36 -08001082 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001083}
1084
1085static void __exit moxa_exit(void)
1086{
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001087 unsigned int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001088
Jiri Slaby9cde5bf2007-02-10 01:45:35 -08001089#ifdef CONFIG_PCI
Jiri Slabya784bf72007-02-10 01:45:36 -08001090 pci_unregister_driver(&moxa_pci_driver);
Jiri Slaby9cde5bf2007-02-10 01:45:35 -08001091#endif
Jiri Slabya784bf72007-02-10 01:45:36 -08001092
Jiri Slaby810ab092008-04-30 00:53:41 -07001093 for (i = 0; i < MAX_BOARDS; i++) /* ISA boards */
1094 if (moxa_boards[i].ready)
1095 moxa_board_deinit(&moxa_boards[i]);
Jiri Slaby2a541342008-04-30 00:53:45 -07001096
1097 del_timer_sync(&moxaTimer);
1098
1099 if (tty_unregister_driver(moxaDriver))
1100 printk(KERN_ERR "Couldn't unregister MOXA Intellio family "
1101 "serial driver\n");
1102 put_tty_driver(moxaDriver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103}
1104
1105module_init(moxa_init);
1106module_exit(moxa_exit);
1107
Alan Coxd450b5a2008-10-13 10:39:58 +01001108static void moxa_close_port(struct tty_struct *tty)
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001109{
Alan Coxd450b5a2008-10-13 10:39:58 +01001110 struct moxa_port *ch = tty->driver_data;
1111 moxa_shut_down(tty);
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001112 MoxaPortFlushData(ch, 2);
Alan Cox9de6a512008-07-16 21:56:02 +01001113 ch->port.flags &= ~ASYNC_NORMAL_ACTIVE;
Alan Coxd450b5a2008-10-13 10:39:58 +01001114 tty->driver_data = NULL;
1115 tty_port_tty_set(&ch->port, NULL);
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001116}
1117
1118static int moxa_block_till_ready(struct tty_struct *tty, struct file *filp,
1119 struct moxa_port *ch)
1120{
1121 DEFINE_WAIT(wait);
1122 int retval = 0;
1123 u8 dcd;
1124
1125 while (1) {
Alan Cox9de6a512008-07-16 21:56:02 +01001126 prepare_to_wait(&ch->port.open_wait, &wait, TASK_INTERRUPTIBLE);
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001127 if (tty_hung_up_p(filp)) {
1128#ifdef SERIAL_DO_RESTART
1129 retval = -ERESTARTSYS;
1130#else
1131 retval = -EAGAIN;
1132#endif
1133 break;
1134 }
1135 spin_lock_bh(&moxa_lock);
1136 dcd = ch->DCDState;
1137 spin_unlock_bh(&moxa_lock);
1138 if (dcd)
1139 break;
1140
1141 if (signal_pending(current)) {
1142 retval = -ERESTARTSYS;
1143 break;
1144 }
1145 schedule();
1146 }
Alan Cox9de6a512008-07-16 21:56:02 +01001147 finish_wait(&ch->port.open_wait, &wait);
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001148
1149 return retval;
1150}
1151
Linus Torvalds1da177e2005-04-16 15:20:36 -07001152static int moxa_open(struct tty_struct *tty, struct file *filp)
1153{
Jiri Slaby810ab092008-04-30 00:53:41 -07001154 struct moxa_board_conf *brd;
Jiri Slaby8f8ecba2007-02-10 01:45:33 -08001155 struct moxa_port *ch;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001156 int port;
1157 int retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001158
Jiri Slaby11324ed2007-02-10 01:45:31 -08001159 port = tty->index;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001160 if (port == MAX_PORTS) {
Jiri Slaby74d7d972008-04-30 00:53:43 -07001161 return capable(CAP_SYS_ADMIN) ? 0 : -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001162 }
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001163 if (mutex_lock_interruptible(&moxa_openlock))
1164 return -ERESTARTSYS;
Jiri Slaby810ab092008-04-30 00:53:41 -07001165 brd = &moxa_boards[port / MAX_PORTS_PER_BOARD];
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001166 if (!brd->ready) {
1167 mutex_unlock(&moxa_openlock);
Jiri Slaby810ab092008-04-30 00:53:41 -07001168 return -ENODEV;
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001169 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001170
Jiri Slaby810ab092008-04-30 00:53:41 -07001171 ch = &brd->ports[port % MAX_PORTS_PER_BOARD];
Alan Cox9de6a512008-07-16 21:56:02 +01001172 ch->port.count++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001173 tty->driver_data = ch;
Alan Coxd450b5a2008-10-13 10:39:58 +01001174 tty_port_tty_set(&ch->port, tty);
Alan Cox9de6a512008-07-16 21:56:02 +01001175 if (!(ch->port.flags & ASYNC_INITIALIZED)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001176 ch->statusflags = 0;
Alan Coxdb1acaa2008-02-08 04:18:43 -08001177 moxa_set_tty_param(tty, tty->termios);
Jiri Slabyb4173f42008-04-30 00:53:40 -07001178 MoxaPortLineCtrl(ch, 1, 1);
1179 MoxaPortEnable(ch);
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001180 MoxaSetFifo(ch, ch->type == PORT_16550A);
Alan Cox9de6a512008-07-16 21:56:02 +01001181 ch->port.flags |= ASYNC_INITIALIZED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001182 }
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001183 mutex_unlock(&moxa_openlock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001184
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001185 retval = 0;
1186 if (!(filp->f_flags & O_NONBLOCK) && !C_CLOCAL(tty))
1187 retval = moxa_block_till_ready(tty, filp, ch);
1188 mutex_lock(&moxa_openlock);
1189 if (retval) {
Alan Cox9de6a512008-07-16 21:56:02 +01001190 if (ch->port.count) /* 0 means already hung up... */
1191 if (--ch->port.count == 0)
Alan Coxd450b5a2008-10-13 10:39:58 +01001192 moxa_close_port(tty);
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001193 } else
Alan Cox9de6a512008-07-16 21:56:02 +01001194 ch->port.flags |= ASYNC_NORMAL_ACTIVE;
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001195 mutex_unlock(&moxa_openlock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001196
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001197 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001198}
1199
1200static void moxa_close(struct tty_struct *tty, struct file *filp)
1201{
Jiri Slaby8f8ecba2007-02-10 01:45:33 -08001202 struct moxa_port *ch;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001203 int port;
1204
Jiri Slaby11324ed2007-02-10 01:45:31 -08001205 port = tty->index;
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001206 if (port == MAX_PORTS || tty_hung_up_p(filp))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001208
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001209 mutex_lock(&moxa_openlock);
1210 ch = tty->driver_data;
1211 if (ch == NULL)
1212 goto unlock;
Alan Cox9de6a512008-07-16 21:56:02 +01001213 if (tty->count == 1 && ch->port.count != 1) {
Jiri Slaby7aeb95d2007-10-18 03:06:24 -07001214 printk(KERN_WARNING "moxa_close: bad serial port count; "
Alan Cox9de6a512008-07-16 21:56:02 +01001215 "tty->count is 1, ch->port.count is %d\n", ch->port.count);
1216 ch->port.count = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001217 }
Alan Cox9de6a512008-07-16 21:56:02 +01001218 if (--ch->port.count < 0) {
Jiri Slaby7aeb95d2007-10-18 03:06:24 -07001219 printk(KERN_WARNING "moxa_close: bad serial port count, "
1220 "device=%s\n", tty->name);
Alan Cox9de6a512008-07-16 21:56:02 +01001221 ch->port.count = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001222 }
Alan Cox9de6a512008-07-16 21:56:02 +01001223 if (ch->port.count)
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001224 goto unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001225
1226 ch->cflag = tty->termios->c_cflag;
Alan Cox9de6a512008-07-16 21:56:02 +01001227 if (ch->port.flags & ASYNC_INITIALIZED) {
Jiri Slaby6f56b652007-10-18 03:06:24 -07001228 moxa_setup_empty_event(tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001229 tty_wait_until_sent(tty, 30 * HZ); /* 30 seconds timeout */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001230 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001231
Alan Coxd450b5a2008-10-13 10:39:58 +01001232 moxa_close_port(tty);
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001233unlock:
1234 mutex_unlock(&moxa_openlock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001235}
1236
1237static int moxa_write(struct tty_struct *tty,
1238 const unsigned char *buf, int count)
1239{
Jiri Slabyb4173f42008-04-30 00:53:40 -07001240 struct moxa_port *ch = tty->driver_data;
Jiri Slabyb4173f42008-04-30 00:53:40 -07001241 int len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242
Linus Torvalds1da177e2005-04-16 15:20:36 -07001243 if (ch == NULL)
Jiri Slabyb4173f42008-04-30 00:53:40 -07001244 return 0;
Alan Cox33f0f882006-01-09 20:54:13 -08001245
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001246 spin_lock_bh(&moxa_lock);
Alan Coxd450b5a2008-10-13 10:39:58 +01001247 len = MoxaPortWriteData(tty, buf, count);
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001248 spin_unlock_bh(&moxa_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001249
Linus Torvalds1da177e2005-04-16 15:20:36 -07001250 ch->statusflags |= LOWWAIT;
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001251 return len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001252}
1253
1254static int moxa_write_room(struct tty_struct *tty)
1255{
Jiri Slaby8f8ecba2007-02-10 01:45:33 -08001256 struct moxa_port *ch;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001257
1258 if (tty->stopped)
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001259 return 0;
Jiri Slabyb4173f42008-04-30 00:53:40 -07001260 ch = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001261 if (ch == NULL)
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001262 return 0;
Jiri Slabyb4173f42008-04-30 00:53:40 -07001263 return MoxaPortTxFree(ch);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001264}
1265
1266static void moxa_flush_buffer(struct tty_struct *tty)
1267{
Jiri Slabyb4173f42008-04-30 00:53:40 -07001268 struct moxa_port *ch = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001269
1270 if (ch == NULL)
1271 return;
Jiri Slabyb4173f42008-04-30 00:53:40 -07001272 MoxaPortFlushData(ch, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001273 tty_wakeup(tty);
1274}
1275
1276static int moxa_chars_in_buffer(struct tty_struct *tty)
1277{
Jiri Slabyb4173f42008-04-30 00:53:40 -07001278 struct moxa_port *ch = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001279 int chars;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001280
1281 /*
1282 * Sigh...I have to check if driver_data is NULL here, because
1283 * if an open() fails, the TTY subsystem eventually calls
1284 * tty_wait_until_sent(), which calls the driver's chars_in_buffer()
1285 * routine. And since the open() failed, we return 0 here. TDJ
1286 */
1287 if (ch == NULL)
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001288 return 0;
Alan Cox978e5952008-04-30 00:53:59 -07001289 lock_kernel();
Jiri Slabyb4173f42008-04-30 00:53:40 -07001290 chars = MoxaPortTxQueue(ch);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001291 if (chars) {
1292 /*
1293 * Make it possible to wakeup anything waiting for output
1294 * in tty_ioctl.c, etc.
1295 */
1296 if (!(ch->statusflags & EMPTYWAIT))
Jiri Slaby6f56b652007-10-18 03:06:24 -07001297 moxa_setup_empty_event(tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001298 }
Alan Cox978e5952008-04-30 00:53:59 -07001299 unlock_kernel();
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001300 return chars;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001301}
1302
Linus Torvalds1da177e2005-04-16 15:20:36 -07001303static int moxa_tiocmget(struct tty_struct *tty, struct file *file)
1304{
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001305 struct moxa_port *ch;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001306 int flag = 0, dtr, rts;
1307
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001308 mutex_lock(&moxa_openlock);
1309 ch = tty->driver_data;
1310 if (!ch) {
1311 mutex_unlock(&moxa_openlock);
Jiri Slaby74d7d972008-04-30 00:53:43 -07001312 return -EINVAL;
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001313 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001314
Jiri Slabyb4173f42008-04-30 00:53:40 -07001315 MoxaPortGetLineOut(ch, &dtr, &rts);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001316 if (dtr)
1317 flag |= TIOCM_DTR;
1318 if (rts)
1319 flag |= TIOCM_RTS;
Jiri Slabyb4173f42008-04-30 00:53:40 -07001320 dtr = MoxaPortLineStatus(ch);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001321 if (dtr & 1)
1322 flag |= TIOCM_CTS;
1323 if (dtr & 2)
1324 flag |= TIOCM_DSR;
1325 if (dtr & 4)
1326 flag |= TIOCM_CD;
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001327 mutex_unlock(&moxa_openlock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001328 return flag;
1329}
1330
1331static int moxa_tiocmset(struct tty_struct *tty, struct file *file,
1332 unsigned int set, unsigned int clear)
1333{
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001334 struct moxa_port *ch;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001335 int port;
1336 int dtr, rts;
1337
Jiri Slaby11324ed2007-02-10 01:45:31 -08001338 port = tty->index;
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001339 mutex_lock(&moxa_openlock);
1340 ch = tty->driver_data;
1341 if (!ch) {
1342 mutex_unlock(&moxa_openlock);
Jiri Slaby74d7d972008-04-30 00:53:43 -07001343 return -EINVAL;
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001344 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001345
Jiri Slabyb4173f42008-04-30 00:53:40 -07001346 MoxaPortGetLineOut(ch, &dtr, &rts);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001347 if (set & TIOCM_RTS)
1348 rts = 1;
1349 if (set & TIOCM_DTR)
1350 dtr = 1;
1351 if (clear & TIOCM_RTS)
1352 rts = 0;
1353 if (clear & TIOCM_DTR)
1354 dtr = 0;
Jiri Slabyb4173f42008-04-30 00:53:40 -07001355 MoxaPortLineCtrl(ch, dtr, rts);
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001356 mutex_unlock(&moxa_openlock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001357 return 0;
1358}
1359
Linus Torvalds1da177e2005-04-16 15:20:36 -07001360static void moxa_throttle(struct tty_struct *tty)
1361{
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001362 struct moxa_port *ch = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001363
1364 ch->statusflags |= THROTTLE;
1365}
1366
1367static void moxa_unthrottle(struct tty_struct *tty)
1368{
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001369 struct moxa_port *ch = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001370
1371 ch->statusflags &= ~THROTTLE;
1372}
1373
1374static void moxa_set_termios(struct tty_struct *tty,
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001375 struct ktermios *old_termios)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001376{
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001377 struct moxa_port *ch = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001378
1379 if (ch == NULL)
1380 return;
Alan Coxdb1acaa2008-02-08 04:18:43 -08001381 moxa_set_tty_param(tty, old_termios);
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001382 if (!(old_termios->c_cflag & CLOCAL) && C_CLOCAL(tty))
Alan Cox9de6a512008-07-16 21:56:02 +01001383 wake_up_interruptible(&ch->port.open_wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001384}
1385
1386static void moxa_stop(struct tty_struct *tty)
1387{
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001388 struct moxa_port *ch = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001389
1390 if (ch == NULL)
1391 return;
Jiri Slabyb4173f42008-04-30 00:53:40 -07001392 MoxaPortTxDisable(ch);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001393 ch->statusflags |= TXSTOPPED;
1394}
1395
1396
1397static void moxa_start(struct tty_struct *tty)
1398{
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001399 struct moxa_port *ch = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001400
1401 if (ch == NULL)
1402 return;
1403
1404 if (!(ch->statusflags & TXSTOPPED))
1405 return;
1406
Jiri Slabyb4173f42008-04-30 00:53:40 -07001407 MoxaPortTxEnable(ch);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001408 ch->statusflags &= ~TXSTOPPED;
1409}
1410
1411static void moxa_hangup(struct tty_struct *tty)
1412{
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001413 struct moxa_port *ch;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001414
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001415 mutex_lock(&moxa_openlock);
1416 ch = tty->driver_data;
1417 if (ch == NULL) {
1418 mutex_unlock(&moxa_openlock);
1419 return;
1420 }
Alan Cox9de6a512008-07-16 21:56:02 +01001421 ch->port.count = 0;
Alan Coxd450b5a2008-10-13 10:39:58 +01001422 moxa_close_port(tty);
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001423 mutex_unlock(&moxa_openlock);
1424
Alan Cox9de6a512008-07-16 21:56:02 +01001425 wake_up_interruptible(&ch->port.open_wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001426}
1427
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001428static void moxa_new_dcdstate(struct moxa_port *p, u8 dcd)
1429{
Alan Coxd450b5a2008-10-13 10:39:58 +01001430 struct tty_struct *tty;
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001431 dcd = !!dcd;
1432
Alan Coxd450b5a2008-10-13 10:39:58 +01001433 if (dcd != p->DCDState) {
1434 tty = tty_port_tty_get(&p->port);
1435 if (tty && C_CLOCAL(tty) && !dcd)
1436 tty_hangup(tty);
1437 tty_kref_put(tty);
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001438 }
1439 p->DCDState = dcd;
1440}
1441
1442static int moxa_poll_port(struct moxa_port *p, unsigned int handle,
1443 u16 __iomem *ip)
1444{
Alan Coxd450b5a2008-10-13 10:39:58 +01001445 struct tty_struct *tty = tty_port_tty_get(&p->port);
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001446 void __iomem *ofsAddr;
Alan Cox9de6a512008-07-16 21:56:02 +01001447 unsigned int inited = p->port.flags & ASYNC_INITIALIZED;
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001448 u16 intr;
1449
1450 if (tty) {
1451 if ((p->statusflags & EMPTYWAIT) &&
1452 MoxaPortTxQueue(p) == 0) {
1453 p->statusflags &= ~EMPTYWAIT;
1454 tty_wakeup(tty);
1455 }
1456 if ((p->statusflags & LOWWAIT) && !tty->stopped &&
1457 MoxaPortTxQueue(p) <= WAKEUP_CHARS) {
1458 p->statusflags &= ~LOWWAIT;
1459 tty_wakeup(tty);
1460 }
1461
1462 if (inited && !(p->statusflags & THROTTLE) &&
1463 MoxaPortRxQueue(p) > 0) { /* RX */
1464 MoxaPortReadData(p);
1465 tty_schedule_flip(tty);
1466 }
1467 } else {
1468 p->statusflags &= ~EMPTYWAIT;
1469 MoxaPortFlushData(p, 0); /* flush RX */
1470 }
1471
1472 if (!handle) /* nothing else to do */
1473 return 0;
1474
1475 intr = readw(ip); /* port irq status */
1476 if (intr == 0)
1477 return 0;
1478
1479 writew(0, ip); /* ACK port */
1480 ofsAddr = p->tableAddr;
1481 if (intr & IntrTx) /* disable tx intr */
1482 writew(readw(ofsAddr + HostStat) & ~WakeupTx,
1483 ofsAddr + HostStat);
1484
1485 if (!inited)
1486 return 0;
1487
1488 if (tty && (intr & IntrBreak) && !I_IGNBRK(tty)) { /* BREAK */
1489 tty_insert_flip_char(tty, 0, TTY_BREAK);
1490 tty_schedule_flip(tty);
1491 }
Alan Coxd450b5a2008-10-13 10:39:58 +01001492 tty_kref_put(tty);
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001493
1494 if (intr & IntrLine)
1495 moxa_new_dcdstate(p, readb(ofsAddr + FlagStat) & DCD_state);
1496
1497 return 0;
1498}
1499
Linus Torvalds1da177e2005-04-16 15:20:36 -07001500static void moxa_poll(unsigned long ignored)
1501{
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001502 struct moxa_board_conf *brd;
1503 u16 __iomem *ip;
Jiri Slaby2a541342008-04-30 00:53:45 -07001504 unsigned int card, port, served = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001505
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001506 spin_lock(&moxa_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001507 for (card = 0; card < MAX_BOARDS; card++) {
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001508 brd = &moxa_boards[card];
1509 if (!brd->ready)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001510 continue;
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001511
Jiri Slaby2a541342008-04-30 00:53:45 -07001512 served++;
1513
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001514 ip = NULL;
1515 if (readb(brd->intPend) == 0xff)
1516 ip = brd->intTable + readb(brd->intNdx);
1517
1518 for (port = 0; port < brd->numPorts; port++)
1519 moxa_poll_port(&brd->ports[port], !!ip, ip + port);
1520
1521 if (ip)
1522 writeb(0, brd->intPend); /* ACK */
1523
1524 if (moxaLowWaterChk) {
1525 struct moxa_port *p = brd->ports;
1526 for (port = 0; port < brd->numPorts; port++, p++)
1527 if (p->lowChkFlag) {
1528 p->lowChkFlag = 0;
1529 moxa_low_water_check(p->tableAddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001530 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001531 }
1532 }
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001533 moxaLowWaterChk = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001534
Jiri Slaby2a541342008-04-30 00:53:45 -07001535 if (served)
1536 mod_timer(&moxaTimer, jiffies + HZ / 50);
1537 spin_unlock(&moxa_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001538}
1539
1540/******************************************************************************/
1541
Alan Coxdb1acaa2008-02-08 04:18:43 -08001542static void moxa_set_tty_param(struct tty_struct *tty, struct ktermios *old_termios)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001543{
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001544 register struct ktermios *ts = tty->termios;
1545 struct moxa_port *ch = tty->driver_data;
Alan Coxdb1acaa2008-02-08 04:18:43 -08001546 int rts, cts, txflow, rxflow, xany, baud;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001547
Linus Torvalds1da177e2005-04-16 15:20:36 -07001548 rts = cts = txflow = rxflow = xany = 0;
1549 if (ts->c_cflag & CRTSCTS)
1550 rts = cts = 1;
1551 if (ts->c_iflag & IXON)
1552 txflow = 1;
1553 if (ts->c_iflag & IXOFF)
1554 rxflow = 1;
1555 if (ts->c_iflag & IXANY)
1556 xany = 1;
Alan Coxdb1acaa2008-02-08 04:18:43 -08001557
1558 /* Clear the features we don't support */
1559 ts->c_cflag &= ~CMSPAR;
Jiri Slabyb4173f42008-04-30 00:53:40 -07001560 MoxaPortFlowCtrl(ch, rts, cts, txflow, rxflow, xany);
1561 baud = MoxaPortSetTermio(ch, ts, tty_get_baud_rate(tty));
Alan Coxdb1acaa2008-02-08 04:18:43 -08001562 if (baud == -1)
1563 baud = tty_termios_baud_rate(old_termios);
1564 /* Not put the baud rate into the termios data */
1565 tty_encode_baud_rate(tty, baud, baud);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001566}
1567
Jiri Slaby6f56b652007-10-18 03:06:24 -07001568static void moxa_setup_empty_event(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001569{
Jiri Slaby8f8ecba2007-02-10 01:45:33 -08001570 struct moxa_port *ch = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001571
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001572 spin_lock_bh(&moxa_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001573 ch->statusflags |= EMPTYWAIT;
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001574 spin_unlock_bh(&moxa_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001575}
1576
Alan Coxd450b5a2008-10-13 10:39:58 +01001577static void moxa_shut_down(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001578{
Alan Coxd450b5a2008-10-13 10:39:58 +01001579 struct moxa_port *ch = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001580
Alan Cox9de6a512008-07-16 21:56:02 +01001581 if (!(ch->port.flags & ASYNC_INITIALIZED))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001582 return;
1583
Jiri Slabyb4173f42008-04-30 00:53:40 -07001584 MoxaPortDisable(ch);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001585
1586 /*
1587 * If we're a modem control device and HUPCL is on, drop RTS & DTR.
1588 */
Alan Coxd450b5a2008-10-13 10:39:58 +01001589 if (C_HUPCL(tty))
Jiri Slabyb4173f42008-04-30 00:53:40 -07001590 MoxaPortLineCtrl(ch, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001591
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001592 spin_lock_bh(&moxa_lock);
Alan Cox9de6a512008-07-16 21:56:02 +01001593 ch->port.flags &= ~ASYNC_INITIALIZED;
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001594 spin_unlock_bh(&moxa_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001595}
1596
Linus Torvalds1da177e2005-04-16 15:20:36 -07001597/*****************************************************************************
1598 * Driver level functions: *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001599 *****************************************************************************/
Linus Torvalds1da177e2005-04-16 15:20:36 -07001600
Jiri Slabyb4173f42008-04-30 00:53:40 -07001601static void MoxaPortFlushData(struct moxa_port *port, int mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001602{
1603 void __iomem *ofsAddr;
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001604 if (mode < 0 || mode > 2)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001605 return;
Jiri Slabyb4173f42008-04-30 00:53:40 -07001606 ofsAddr = port->tableAddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001607 moxafunc(ofsAddr, FC_FlushQueue, mode);
1608 if (mode != 1) {
Jiri Slabyb4173f42008-04-30 00:53:40 -07001609 port->lowChkFlag = 0;
Jiri Slaby6f56b652007-10-18 03:06:24 -07001610 moxa_low_water_check(ofsAddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001611 }
1612}
1613
Linus Torvalds1da177e2005-04-16 15:20:36 -07001614/*
1615 * Moxa Port Number Description:
1616 *
1617 * MOXA serial driver supports up to 4 MOXA-C218/C320 boards. And,
1618 * the port number using in MOXA driver functions will be 0 to 31 for
1619 * first MOXA board, 32 to 63 for second, 64 to 95 for third and 96
1620 * to 127 for fourth. For example, if you setup three MOXA boards,
1621 * first board is C218, second board is C320-16 and third board is
1622 * C320-32. The port number of first board (C218 - 8 ports) is from
1623 * 0 to 7. The port number of second board (C320 - 16 ports) is form
1624 * 32 to 47. The port number of third board (C320 - 32 ports) is from
1625 * 64 to 95. And those port numbers form 8 to 31, 48 to 63 and 96 to
1626 * 127 will be invalid.
1627 *
1628 *
1629 * Moxa Functions Description:
1630 *
1631 * Function 1: Driver initialization routine, this routine must be
1632 * called when initialized driver.
1633 * Syntax:
1634 * void MoxaDriverInit();
1635 *
1636 *
1637 * Function 2: Moxa driver private IOCTL command processing.
1638 * Syntax:
1639 * int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port);
1640 *
1641 * unsigned int cmd : IOCTL command
1642 * unsigned long arg : IOCTL argument
1643 * int port : port number (0 - 127)
1644 *
1645 * return: 0 (OK)
1646 * -EINVAL
1647 * -ENOIOCTLCMD
1648 *
1649 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001650 * Function 6: Enable this port to start Tx/Rx data.
1651 * Syntax:
1652 * void MoxaPortEnable(int port);
1653 * int port : port number (0 - 127)
1654 *
1655 *
1656 * Function 7: Disable this port
1657 * Syntax:
1658 * void MoxaPortDisable(int port);
1659 * int port : port number (0 - 127)
1660 *
1661 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001662 * Function 10: Setting baud rate of this port.
1663 * Syntax:
Jiri Slaby08d01c72008-04-30 00:53:47 -07001664 * speed_t MoxaPortSetBaud(int port, speed_t baud);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001665 * int port : port number (0 - 127)
1666 * long baud : baud rate (50 - 115200)
1667 *
1668 * return: 0 : this port is invalid or baud < 50
1669 * 50 - 115200 : the real baud rate set to the port, if
1670 * the argument baud is large than maximun
1671 * available baud rate, the real setting
1672 * baud rate will be the maximun baud rate.
1673 *
1674 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001675 * Function 12: Configure the port.
1676 * Syntax:
Alan Cox606d0992006-12-08 02:38:45 -08001677 * int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001678 * int port : port number (0 - 127)
Alan Cox606d0992006-12-08 02:38:45 -08001679 * struct ktermios * termio : termio structure pointer
Alan Coxc7bce302006-09-30 23:27:24 -07001680 * speed_t baud : baud rate
Linus Torvalds1da177e2005-04-16 15:20:36 -07001681 *
1682 * return: -1 : this port is invalid or termio == NULL
1683 * 0 : setting O.K.
1684 *
1685 *
1686 * Function 13: Get the DTR/RTS state of this port.
1687 * Syntax:
1688 * int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState);
1689 * int port : port number (0 - 127)
1690 * int * dtrState : pointer to INT to receive the current DTR
1691 * state. (if NULL, this function will not
1692 * write to this address)
1693 * int * rtsState : pointer to INT to receive the current RTS
1694 * state. (if NULL, this function will not
1695 * write to this address)
1696 *
1697 * return: -1 : this port is invalid
1698 * 0 : O.K.
1699 *
1700 *
1701 * Function 14: Setting the DTR/RTS output state of this port.
1702 * Syntax:
1703 * void MoxaPortLineCtrl(int port, int dtrState, int rtsState);
1704 * int port : port number (0 - 127)
1705 * int dtrState : DTR output state (0: off, 1: on)
1706 * int rtsState : RTS output state (0: off, 1: on)
1707 *
1708 *
1709 * Function 15: Setting the flow control of this port.
1710 * Syntax:
1711 * void MoxaPortFlowCtrl(int port, int rtsFlow, int ctsFlow, int rxFlow,
1712 * int txFlow,int xany);
1713 * int port : port number (0 - 127)
1714 * int rtsFlow : H/W RTS flow control (0: no, 1: yes)
1715 * int ctsFlow : H/W CTS flow control (0: no, 1: yes)
1716 * int rxFlow : S/W Rx XON/XOFF flow control (0: no, 1: yes)
1717 * int txFlow : S/W Tx XON/XOFF flow control (0: no, 1: yes)
1718 * int xany : S/W XANY flow control (0: no, 1: yes)
1719 *
1720 *
1721 * Function 16: Get ths line status of this port
1722 * Syntax:
1723 * int MoxaPortLineStatus(int port);
1724 * int port : port number (0 - 127)
1725 *
1726 * return: Bit 0 - CTS state (0: off, 1: on)
1727 * Bit 1 - DSR state (0: off, 1: on)
1728 * Bit 2 - DCD state (0: off, 1: on)
1729 *
1730 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001731 * Function 19: Flush the Rx/Tx buffer data of this port.
1732 * Syntax:
1733 * void MoxaPortFlushData(int port, int mode);
1734 * int port : port number (0 - 127)
1735 * int mode
1736 * 0 : flush the Rx buffer
1737 * 1 : flush the Tx buffer
1738 * 2 : flush the Rx and Tx buffer
1739 *
1740 *
1741 * Function 20: Write data.
1742 * Syntax:
1743 * int MoxaPortWriteData(int port, unsigned char * buffer, int length);
1744 * int port : port number (0 - 127)
1745 * unsigned char * buffer : pointer to write data buffer.
1746 * int length : write data length
1747 *
1748 * return: 0 - length : real write data length
1749 *
1750 *
1751 * Function 21: Read data.
1752 * Syntax:
Alan Cox33f0f882006-01-09 20:54:13 -08001753 * int MoxaPortReadData(int port, struct tty_struct *tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001754 * int port : port number (0 - 127)
Alan Cox33f0f882006-01-09 20:54:13 -08001755 * struct tty_struct *tty : tty for data
Linus Torvalds1da177e2005-04-16 15:20:36 -07001756 *
1757 * return: 0 - length : real read data length
1758 *
1759 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001760 * Function 24: Get the Tx buffer current queued data bytes
1761 * Syntax:
1762 * int MoxaPortTxQueue(int port);
1763 * int port : port number (0 - 127)
1764 *
1765 * return: .. : Tx buffer current queued data bytes
1766 *
1767 *
1768 * Function 25: Get the Tx buffer current free space
1769 * Syntax:
1770 * int MoxaPortTxFree(int port);
1771 * int port : port number (0 - 127)
1772 *
1773 * return: .. : Tx buffer current free space
1774 *
1775 *
1776 * Function 26: Get the Rx buffer current queued data bytes
1777 * Syntax:
1778 * int MoxaPortRxQueue(int port);
1779 * int port : port number (0 - 127)
1780 *
1781 * return: .. : Rx buffer current queued data bytes
1782 *
1783 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001784 * Function 28: Disable port data transmission.
1785 * Syntax:
1786 * void MoxaPortTxDisable(int port);
1787 * int port : port number (0 - 127)
1788 *
1789 *
1790 * Function 29: Enable port data transmission.
1791 * Syntax:
1792 * void MoxaPortTxEnable(int port);
1793 * int port : port number (0 - 127)
1794 *
1795 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001796 * Function 31: Get the received BREAK signal count and reset it.
1797 * Syntax:
1798 * int MoxaPortResetBrkCnt(int port);
1799 * int port : port number (0 - 127)
1800 *
1801 * return: 0 - .. : BREAK signal count
1802 *
1803 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001804 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001805
Jiri Slabyb4173f42008-04-30 00:53:40 -07001806static void MoxaPortEnable(struct moxa_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001807{
1808 void __iomem *ofsAddr;
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001809 u16 lowwater = 512;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001810
Jiri Slabyb4173f42008-04-30 00:53:40 -07001811 ofsAddr = port->tableAddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001812 writew(lowwater, ofsAddr + Low_water);
Jiri Slaby08d01c72008-04-30 00:53:47 -07001813 if (MOXA_IS_320(port->board))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001814 moxafunc(ofsAddr, FC_SetBreakIrq, 0);
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001815 else
1816 writew(readw(ofsAddr + HostStat) | WakeupBreak,
1817 ofsAddr + HostStat);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001818
1819 moxafunc(ofsAddr, FC_SetLineIrq, Magic_code);
1820 moxafunc(ofsAddr, FC_FlushQueue, 2);
1821
1822 moxafunc(ofsAddr, FC_EnableCH, Magic_code);
1823 MoxaPortLineStatus(port);
1824}
1825
Jiri Slabyb4173f42008-04-30 00:53:40 -07001826static void MoxaPortDisable(struct moxa_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001827{
Jiri Slabyb4173f42008-04-30 00:53:40 -07001828 void __iomem *ofsAddr = port->tableAddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001829
1830 moxafunc(ofsAddr, FC_SetFlowCtl, 0); /* disable flow control */
1831 moxafunc(ofsAddr, FC_ClrLineIrq, Magic_code);
1832 writew(0, ofsAddr + HostStat);
1833 moxafunc(ofsAddr, FC_DisableCH, Magic_code);
1834}
1835
Jiri Slaby08d01c72008-04-30 00:53:47 -07001836static speed_t MoxaPortSetBaud(struct moxa_port *port, speed_t baud)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001837{
Jiri Slaby08d01c72008-04-30 00:53:47 -07001838 void __iomem *ofsAddr = port->tableAddr;
1839 unsigned int clock, val;
1840 speed_t max;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001841
Jiri Slaby08d01c72008-04-30 00:53:47 -07001842 max = MOXA_IS_320(port->board) ? 460800 : 921600;
1843 if (baud < 50)
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001844 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001845 if (baud > max)
1846 baud = max;
Jiri Slaby08d01c72008-04-30 00:53:47 -07001847 clock = 921600;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001848 val = clock / baud;
1849 moxafunc(ofsAddr, FC_SetBaud, val);
1850 baud = clock / val;
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001851 return baud;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001852}
1853
Jiri Slabyb4173f42008-04-30 00:53:40 -07001854static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio,
1855 speed_t baud)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001856{
1857 void __iomem *ofsAddr;
1858 tcflag_t cflag;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001859 tcflag_t mode = 0;
1860
Jiri Slabyb4173f42008-04-30 00:53:40 -07001861 ofsAddr = port->tableAddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001862 cflag = termio->c_cflag; /* termio->c_cflag */
1863
1864 mode = termio->c_cflag & CSIZE;
1865 if (mode == CS5)
1866 mode = MX_CS5;
1867 else if (mode == CS6)
1868 mode = MX_CS6;
1869 else if (mode == CS7)
1870 mode = MX_CS7;
1871 else if (mode == CS8)
1872 mode = MX_CS8;
1873
1874 if (termio->c_cflag & CSTOPB) {
1875 if (mode == MX_CS5)
1876 mode |= MX_STOP15;
1877 else
1878 mode |= MX_STOP2;
1879 } else
1880 mode |= MX_STOP1;
1881
1882 if (termio->c_cflag & PARENB) {
1883 if (termio->c_cflag & PARODD)
1884 mode |= MX_PARODD;
1885 else
1886 mode |= MX_PAREVEN;
1887 } else
1888 mode |= MX_PARNONE;
1889
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001890 moxafunc(ofsAddr, FC_SetDataMode, (u16)mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001891
Jiri Slaby08d01c72008-04-30 00:53:47 -07001892 if (MOXA_IS_320(port->board) && baud >= 921600)
1893 return -1;
1894
Alan Coxdb1acaa2008-02-08 04:18:43 -08001895 baud = MoxaPortSetBaud(port, baud);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001896
1897 if (termio->c_iflag & (IXON | IXOFF | IXANY)) {
1898 writeb(termio->c_cc[VSTART], ofsAddr + FuncArg);
1899 writeb(termio->c_cc[VSTOP], ofsAddr + FuncArg1);
1900 writeb(FC_SetXonXoff, ofsAddr + FuncCode);
Jiri Slaby6f56b652007-10-18 03:06:24 -07001901 moxa_wait_finish(ofsAddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001902
1903 }
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001904 return baud;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001905}
1906
Jiri Slabyb4173f42008-04-30 00:53:40 -07001907static int MoxaPortGetLineOut(struct moxa_port *port, int *dtrState,
1908 int *rtsState)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001909{
Jiri Slabyb4173f42008-04-30 00:53:40 -07001910 if (dtrState)
1911 *dtrState = !!(port->lineCtrl & DTR_ON);
1912 if (rtsState)
1913 *rtsState = !!(port->lineCtrl & RTS_ON);
1914
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001915 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001916}
1917
Jiri Slabyb4173f42008-04-30 00:53:40 -07001918static void MoxaPortLineCtrl(struct moxa_port *port, int dtr, int rts)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001919{
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001920 u8 mode = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001921
Linus Torvalds1da177e2005-04-16 15:20:36 -07001922 if (dtr)
1923 mode |= DTR_ON;
1924 if (rts)
1925 mode |= RTS_ON;
Jiri Slabyb4173f42008-04-30 00:53:40 -07001926 port->lineCtrl = mode;
1927 moxafunc(port->tableAddr, FC_LineControl, mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001928}
1929
Jiri Slabyb4173f42008-04-30 00:53:40 -07001930static void MoxaPortFlowCtrl(struct moxa_port *port, int rts, int cts,
1931 int txflow, int rxflow, int txany)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001932{
Jiri Slabyb4173f42008-04-30 00:53:40 -07001933 int mode = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001934
Linus Torvalds1da177e2005-04-16 15:20:36 -07001935 if (rts)
1936 mode |= RTS_FlowCtl;
1937 if (cts)
1938 mode |= CTS_FlowCtl;
1939 if (txflow)
1940 mode |= Tx_FlowCtl;
1941 if (rxflow)
1942 mode |= Rx_FlowCtl;
1943 if (txany)
1944 mode |= IXM_IXANY;
Jiri Slabyb4173f42008-04-30 00:53:40 -07001945 moxafunc(port->tableAddr, FC_SetFlowCtl, mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001946}
1947
Jiri Slabyb4173f42008-04-30 00:53:40 -07001948static int MoxaPortLineStatus(struct moxa_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001949{
1950 void __iomem *ofsAddr;
1951 int val;
1952
Jiri Slabyb4173f42008-04-30 00:53:40 -07001953 ofsAddr = port->tableAddr;
Jiri Slaby08d01c72008-04-30 00:53:47 -07001954 if (MOXA_IS_320(port->board)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001955 moxafunc(ofsAddr, FC_LineStatus, 0);
1956 val = readw(ofsAddr + FuncArg);
1957 } else {
1958 val = readw(ofsAddr + FlagStat) >> 4;
1959 }
1960 val &= 0x0B;
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001961 if (val & 8)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001962 val |= 4;
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001963 spin_lock_bh(&moxa_lock);
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001964 moxa_new_dcdstate(port, val & 8);
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001965 spin_unlock_bh(&moxa_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001966 val &= 7;
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001967 return val;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001968}
1969
Alan Coxd450b5a2008-10-13 10:39:58 +01001970static int MoxaPortWriteData(struct tty_struct *tty,
Jiri Slaby2108eba2008-04-30 00:53:44 -07001971 const unsigned char *buffer, int len)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001972{
Alan Coxd450b5a2008-10-13 10:39:58 +01001973 struct moxa_port *port = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001974 void __iomem *baseAddr, *ofsAddr, *ofs;
Jiri Slaby2108eba2008-04-30 00:53:44 -07001975 unsigned int c, total;
1976 u16 head, tail, tx_mask, spage, epage;
1977 u16 pageno, pageofs, bufhead;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001978
Jiri Slabyb4173f42008-04-30 00:53:40 -07001979 ofsAddr = port->tableAddr;
1980 baseAddr = port->board->basemem;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001981 tx_mask = readw(ofsAddr + TX_mask);
1982 spage = readw(ofsAddr + Page_txb);
1983 epage = readw(ofsAddr + EndPage_txb);
1984 tail = readw(ofsAddr + TXwptr);
1985 head = readw(ofsAddr + TXrptr);
Jiri Slaby2108eba2008-04-30 00:53:44 -07001986 c = (head > tail) ? (head - tail - 1) : (head - tail + tx_mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001987 if (c > len)
1988 c = len;
Alan Cox9de6a512008-07-16 21:56:02 +01001989 moxaLog.txcnt[port->port.tty->index] += c;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001990 total = c;
1991 if (spage == epage) {
1992 bufhead = readw(ofsAddr + Ofs_txb);
1993 writew(spage, baseAddr + Control_reg);
1994 while (c > 0) {
1995 if (head > tail)
1996 len = head - tail - 1;
1997 else
1998 len = tx_mask + 1 - tail;
1999 len = (c > len) ? len : c;
2000 ofs = baseAddr + DynPage_addr + bufhead + tail;
Jiri Slaby2108eba2008-04-30 00:53:44 -07002001 memcpy_toio(ofs, buffer, len);
2002 buffer += len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002003 tail = (tail + len) & tx_mask;
2004 c -= len;
2005 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002006 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002007 pageno = spage + (tail >> 13);
2008 pageofs = tail & Page_mask;
Jiri Slaby2108eba2008-04-30 00:53:44 -07002009 while (c > 0) {
2010 len = Page_size - pageofs;
2011 if (len > c)
2012 len = c;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002013 writeb(pageno, baseAddr + Control_reg);
2014 ofs = baseAddr + DynPage_addr + pageofs;
Jiri Slaby2108eba2008-04-30 00:53:44 -07002015 memcpy_toio(ofs, buffer, len);
2016 buffer += len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002017 if (++pageno == epage)
2018 pageno = spage;
2019 pageofs = 0;
Jiri Slaby2108eba2008-04-30 00:53:44 -07002020 c -= len;
2021 }
2022 tail = (tail + total) & tx_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002023 }
Jiri Slaby2108eba2008-04-30 00:53:44 -07002024 writew(tail, ofsAddr + TXwptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002025 writeb(1, ofsAddr + CD180TXirq); /* start to send */
Jiri Slaby2108eba2008-04-30 00:53:44 -07002026 return total;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002027}
2028
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07002029static int MoxaPortReadData(struct moxa_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002030{
Alan Cox9de6a512008-07-16 21:56:02 +01002031 struct tty_struct *tty = port->port.tty;
Jiri Slaby2108eba2008-04-30 00:53:44 -07002032 unsigned char *dst;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002033 void __iomem *baseAddr, *ofsAddr, *ofs;
Jiri Slaby2108eba2008-04-30 00:53:44 -07002034 unsigned int count, len, total;
2035 u16 tail, rx_mask, spage, epage;
2036 u16 pageno, pageofs, bufhead, head;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002037
Jiri Slabyb4173f42008-04-30 00:53:40 -07002038 ofsAddr = port->tableAddr;
2039 baseAddr = port->board->basemem;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002040 head = readw(ofsAddr + RXrptr);
2041 tail = readw(ofsAddr + RXwptr);
2042 rx_mask = readw(ofsAddr + RX_mask);
2043 spage = readw(ofsAddr + Page_rxb);
2044 epage = readw(ofsAddr + EndPage_rxb);
Jiri Slaby2108eba2008-04-30 00:53:44 -07002045 count = (tail >= head) ? (tail - head) : (tail - head + rx_mask + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002046 if (count == 0)
Alan Cox33f0f882006-01-09 20:54:13 -08002047 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002048
Alan Cox33f0f882006-01-09 20:54:13 -08002049 total = count;
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07002050 moxaLog.rxcnt[tty->index] += total;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002051 if (spage == epage) {
2052 bufhead = readw(ofsAddr + Ofs_rxb);
2053 writew(spage, baseAddr + Control_reg);
2054 while (count > 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002055 ofs = baseAddr + DynPage_addr + bufhead + head;
Jiri Slaby2108eba2008-04-30 00:53:44 -07002056 len = (tail >= head) ? (tail - head) :
2057 (rx_mask + 1 - head);
2058 len = tty_prepare_flip_string(tty, &dst,
2059 min(len, count));
2060 memcpy_fromio(dst, ofs, len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002061 head = (head + len) & rx_mask;
2062 count -= len;
2063 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002064 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002065 pageno = spage + (head >> 13);
2066 pageofs = head & Page_mask;
Jiri Slaby2108eba2008-04-30 00:53:44 -07002067 while (count > 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002068 writew(pageno, baseAddr + Control_reg);
2069 ofs = baseAddr + DynPage_addr + pageofs;
Jiri Slaby2108eba2008-04-30 00:53:44 -07002070 len = tty_prepare_flip_string(tty, &dst,
2071 min(Page_size - pageofs, count));
2072 memcpy_fromio(dst, ofs, len);
2073
2074 count -= len;
2075 pageofs = (pageofs + len) & Page_mask;
2076 if (pageofs == 0 && ++pageno == epage)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002077 pageno = spage;
Jiri Slaby2108eba2008-04-30 00:53:44 -07002078 }
2079 head = (head + total) & rx_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002080 }
Jiri Slaby2108eba2008-04-30 00:53:44 -07002081 writew(head, ofsAddr + RXrptr);
2082 if (readb(ofsAddr + FlagStat) & Xoff_state) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002083 moxaLowWaterChk = 1;
Jiri Slabyb4173f42008-04-30 00:53:40 -07002084 port->lowChkFlag = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002085 }
Jiri Slaby2108eba2008-04-30 00:53:44 -07002086 return total;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002087}
2088
2089
Jiri Slabyb4173f42008-04-30 00:53:40 -07002090static int MoxaPortTxQueue(struct moxa_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002091{
Jiri Slabyb4173f42008-04-30 00:53:40 -07002092 void __iomem *ofsAddr = port->tableAddr;
Jiri Slaby2108eba2008-04-30 00:53:44 -07002093 u16 rptr, wptr, mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002094
Linus Torvalds1da177e2005-04-16 15:20:36 -07002095 rptr = readw(ofsAddr + TXrptr);
2096 wptr = readw(ofsAddr + TXwptr);
2097 mask = readw(ofsAddr + TX_mask);
Jiri Slaby2108eba2008-04-30 00:53:44 -07002098 return (wptr - rptr) & mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002099}
2100
Jiri Slabyb4173f42008-04-30 00:53:40 -07002101static int MoxaPortTxFree(struct moxa_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002102{
Jiri Slabyb4173f42008-04-30 00:53:40 -07002103 void __iomem *ofsAddr = port->tableAddr;
Jiri Slaby2108eba2008-04-30 00:53:44 -07002104 u16 rptr, wptr, mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002105
Linus Torvalds1da177e2005-04-16 15:20:36 -07002106 rptr = readw(ofsAddr + TXrptr);
2107 wptr = readw(ofsAddr + TXwptr);
2108 mask = readw(ofsAddr + TX_mask);
Jiri Slaby2108eba2008-04-30 00:53:44 -07002109 return mask - ((wptr - rptr) & mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002110}
2111
Jiri Slabyb4173f42008-04-30 00:53:40 -07002112static int MoxaPortRxQueue(struct moxa_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002113{
Jiri Slabyb4173f42008-04-30 00:53:40 -07002114 void __iomem *ofsAddr = port->tableAddr;
Jiri Slaby2108eba2008-04-30 00:53:44 -07002115 u16 rptr, wptr, mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002116
Linus Torvalds1da177e2005-04-16 15:20:36 -07002117 rptr = readw(ofsAddr + RXrptr);
2118 wptr = readw(ofsAddr + RXwptr);
2119 mask = readw(ofsAddr + RX_mask);
Jiri Slaby2108eba2008-04-30 00:53:44 -07002120 return (wptr - rptr) & mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002121}
2122
Jiri Slabyb4173f42008-04-30 00:53:40 -07002123static void MoxaPortTxDisable(struct moxa_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002124{
Jiri Slabyb4173f42008-04-30 00:53:40 -07002125 moxafunc(port->tableAddr, FC_SetXoffState, Magic_code);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002126}
2127
Jiri Slabyb4173f42008-04-30 00:53:40 -07002128static void MoxaPortTxEnable(struct moxa_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002129{
Jiri Slabyb4173f42008-04-30 00:53:40 -07002130 moxafunc(port->tableAddr, FC_SetXonState, Magic_code);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002131}
2132
Jiri Slaby8f8ecba2007-02-10 01:45:33 -08002133static int moxa_get_serial_info(struct moxa_port *info,
Jiri Slabyeaa95a82008-04-30 00:53:46 -07002134 struct serial_struct __user *retinfo)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002135{
Jiri Slabyeaa95a82008-04-30 00:53:46 -07002136 struct serial_struct tmp = {
2137 .type = info->type,
Alan Cox9de6a512008-07-16 21:56:02 +01002138 .line = info->port.tty->index,
2139 .flags = info->port.flags,
Jiri Slabyeaa95a82008-04-30 00:53:46 -07002140 .baud_base = 921600,
Alan Cox44b7d1b2008-07-16 21:57:18 +01002141 .close_delay = info->port.close_delay
Jiri Slabyeaa95a82008-04-30 00:53:46 -07002142 };
2143 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002144}
2145
2146
Jiri Slaby8f8ecba2007-02-10 01:45:33 -08002147static int moxa_set_serial_info(struct moxa_port *info,
Jiri Slabyeaa95a82008-04-30 00:53:46 -07002148 struct serial_struct __user *new_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002149{
2150 struct serial_struct new_serial;
2151
Jiri Slabyeaa95a82008-04-30 00:53:46 -07002152 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002153 return -EFAULT;
2154
Jiri Slabyeaa95a82008-04-30 00:53:46 -07002155 if (new_serial.irq != 0 || new_serial.port != 0 ||
2156 new_serial.custom_divisor != 0 ||
2157 new_serial.baud_base != 921600)
2158 return -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002159
2160 if (!capable(CAP_SYS_ADMIN)) {
2161 if (((new_serial.flags & ~ASYNC_USR_MASK) !=
Alan Cox9de6a512008-07-16 21:56:02 +01002162 (info->port.flags & ~ASYNC_USR_MASK)))
Jiri Slabyeaa95a82008-04-30 00:53:46 -07002163 return -EPERM;
2164 } else
Alan Cox44b7d1b2008-07-16 21:57:18 +01002165 info->port.close_delay = new_serial.close_delay * HZ / 100;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002166
2167 new_serial.flags = (new_serial.flags & ~ASYNC_FLAGS);
Alan Cox9de6a512008-07-16 21:56:02 +01002168 new_serial.flags |= (info->port.flags & ASYNC_FLAGS);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002169
Jiri Slabyeaa95a82008-04-30 00:53:46 -07002170 MoxaSetFifo(info, new_serial.type == PORT_16550A);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002171
2172 info->type = new_serial.type;
Jiri Slabyeaa95a82008-04-30 00:53:46 -07002173 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002174}
2175
2176
2177
2178/*****************************************************************************
2179 * Static local functions: *
2180 *****************************************************************************/
Linus Torvalds1da177e2005-04-16 15:20:36 -07002181
Jiri Slabyb4173f42008-04-30 00:53:40 -07002182static void MoxaSetFifo(struct moxa_port *port, int enable)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002183{
Jiri Slabyb4173f42008-04-30 00:53:40 -07002184 void __iomem *ofsAddr = port->tableAddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002185
2186 if (!enable) {
2187 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 0);
2188 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 1);
2189 } else {
2190 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 3);
2191 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 16);
2192 }
2193}