blob: 65b6ff2442c6df4edfd839b37752ded8340df9c9 [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 *);
Alan Cox31f35932009-01-02 13:45:05 +0000209static int moxa_carrier_raised(struct tty_port *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210/*
211 * moxa board interface functions:
212 */
Jiri Slabyb4173f42008-04-30 00:53:40 -0700213static void MoxaPortEnable(struct moxa_port *);
214static void MoxaPortDisable(struct moxa_port *);
215static int MoxaPortSetTermio(struct moxa_port *, struct ktermios *, speed_t);
216static int MoxaPortGetLineOut(struct moxa_port *, int *, int *);
217static void MoxaPortLineCtrl(struct moxa_port *, int, int);
218static void MoxaPortFlowCtrl(struct moxa_port *, int, int, int, int, int);
219static int MoxaPortLineStatus(struct moxa_port *);
Jiri Slabyb4173f42008-04-30 00:53:40 -0700220static void MoxaPortFlushData(struct moxa_port *, int);
Alan Coxd450b5a2008-10-13 10:39:58 +0100221static int MoxaPortWriteData(struct tty_struct *, const unsigned char *, int);
Jiri Slaby7bcf97d2008-04-30 00:53:43 -0700222static int MoxaPortReadData(struct moxa_port *);
Jiri Slabyb4173f42008-04-30 00:53:40 -0700223static int MoxaPortTxQueue(struct moxa_port *);
224static int MoxaPortRxQueue(struct moxa_port *);
225static int MoxaPortTxFree(struct moxa_port *);
226static void MoxaPortTxDisable(struct moxa_port *);
227static void MoxaPortTxEnable(struct moxa_port *);
Jiri Slaby8f8ecba2007-02-10 01:45:33 -0800228static int moxa_get_serial_info(struct moxa_port *, struct serial_struct __user *);
229static int moxa_set_serial_info(struct moxa_port *, struct serial_struct __user *);
Jiri Slabyb4173f42008-04-30 00:53:40 -0700230static void MoxaSetFifo(struct moxa_port *port, int enable);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231
Jiri Slaby74d7d972008-04-30 00:53:43 -0700232/*
233 * I/O functions
234 */
235
236static void moxa_wait_finish(void __iomem *ofsAddr)
237{
238 unsigned long end = jiffies + moxaFuncTout;
239
240 while (readw(ofsAddr + FuncCode) != 0)
241 if (time_after(jiffies, end))
242 return;
243 if (readw(ofsAddr + FuncCode) != 0 && printk_ratelimit())
244 printk(KERN_WARNING "moxa function expired\n");
245}
246
Jiri Slabyeaa95a82008-04-30 00:53:46 -0700247static void moxafunc(void __iomem *ofsAddr, u16 cmd, u16 arg)
Jiri Slaby74d7d972008-04-30 00:53:43 -0700248{
249 writew(arg, ofsAddr + FuncArg);
250 writew(cmd, ofsAddr + FuncCode);
251 moxa_wait_finish(ofsAddr);
252}
253
Jiri Slaby7bcf97d2008-04-30 00:53:43 -0700254static void moxa_low_water_check(void __iomem *ofsAddr)
255{
256 u16 rptr, wptr, mask, len;
257
258 if (readb(ofsAddr + FlagStat) & Xoff_state) {
259 rptr = readw(ofsAddr + RXrptr);
260 wptr = readw(ofsAddr + RXwptr);
261 mask = readw(ofsAddr + RX_mask);
262 len = (wptr - rptr) & mask;
263 if (len <= Low_water)
264 moxafunc(ofsAddr, FC_SendXon, 0);
265 }
266}
267
Jiri Slaby74d7d972008-04-30 00:53:43 -0700268/*
269 * TTY operations
270 */
271
272static int moxa_ioctl(struct tty_struct *tty, struct file *file,
273 unsigned int cmd, unsigned long arg)
274{
275 struct moxa_port *ch = tty->driver_data;
276 void __user *argp = (void __user *)arg;
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700277 int status, ret = 0;
Jiri Slaby74d7d972008-04-30 00:53:43 -0700278
279 if (tty->index == MAX_PORTS) {
280 if (cmd != MOXA_GETDATACOUNT && cmd != MOXA_GET_IOQUEUE &&
281 cmd != MOXA_GETMSTATUS)
282 return -EINVAL;
283 } else if (!ch)
284 return -ENODEV;
285
286 switch (cmd) {
287 case MOXA_GETDATACOUNT:
288 moxaLog.tick = jiffies;
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700289 if (copy_to_user(argp, &moxaLog, sizeof(moxaLog)))
290 ret = -EFAULT;
291 break;
Jiri Slaby74d7d972008-04-30 00:53:43 -0700292 case MOXA_FLUSH_QUEUE:
293 MoxaPortFlushData(ch, arg);
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700294 break;
Jiri Slaby74d7d972008-04-30 00:53:43 -0700295 case MOXA_GET_IOQUEUE: {
296 struct moxaq_str __user *argm = argp;
297 struct moxaq_str tmp;
298 struct moxa_port *p;
299 unsigned int i, j;
300
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700301 mutex_lock(&moxa_openlock);
Jiri Slaby74d7d972008-04-30 00:53:43 -0700302 for (i = 0; i < MAX_BOARDS; i++) {
303 p = moxa_boards[i].ports;
304 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
305 memset(&tmp, 0, sizeof(tmp));
306 if (moxa_boards[i].ready) {
307 tmp.inq = MoxaPortRxQueue(p);
308 tmp.outq = MoxaPortTxQueue(p);
309 }
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700310 if (copy_to_user(argm, &tmp, sizeof(tmp))) {
311 mutex_unlock(&moxa_openlock);
Jiri Slaby74d7d972008-04-30 00:53:43 -0700312 return -EFAULT;
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700313 }
Jiri Slaby74d7d972008-04-30 00:53:43 -0700314 }
315 }
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700316 mutex_unlock(&moxa_openlock);
317 break;
Jiri Slaby74d7d972008-04-30 00:53:43 -0700318 } case MOXA_GET_OQUEUE:
319 status = MoxaPortTxQueue(ch);
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700320 ret = put_user(status, (unsigned long __user *)argp);
321 break;
Jiri Slaby74d7d972008-04-30 00:53:43 -0700322 case MOXA_GET_IQUEUE:
323 status = MoxaPortRxQueue(ch);
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700324 ret = put_user(status, (unsigned long __user *)argp);
325 break;
Jiri Slaby74d7d972008-04-30 00:53:43 -0700326 case MOXA_GETMSTATUS: {
327 struct mxser_mstatus __user *argm = argp;
328 struct mxser_mstatus tmp;
329 struct moxa_port *p;
330 unsigned int i, j;
331
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700332 mutex_lock(&moxa_openlock);
Jiri Slaby74d7d972008-04-30 00:53:43 -0700333 for (i = 0; i < MAX_BOARDS; i++) {
334 p = moxa_boards[i].ports;
335 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
Alan Coxd450b5a2008-10-13 10:39:58 +0100336 struct tty_struct *ttyp;
Jiri Slaby74d7d972008-04-30 00:53:43 -0700337 memset(&tmp, 0, sizeof(tmp));
338 if (!moxa_boards[i].ready)
339 goto copy;
340
341 status = MoxaPortLineStatus(p);
342 if (status & 1)
343 tmp.cts = 1;
344 if (status & 2)
345 tmp.dsr = 1;
346 if (status & 4)
347 tmp.dcd = 1;
348
Alan Coxd450b5a2008-10-13 10:39:58 +0100349 ttyp = tty_port_tty_get(&p->port);
350 if (!ttyp || !ttyp->termios)
Jiri Slaby74d7d972008-04-30 00:53:43 -0700351 tmp.cflag = p->cflag;
352 else
Alan Coxd450b5a2008-10-13 10:39:58 +0100353 tmp.cflag = ttyp->termios->c_cflag;
354 tty_kref_put(tty);
Jiri Slaby74d7d972008-04-30 00:53:43 -0700355copy:
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700356 if (copy_to_user(argm, &tmp, sizeof(tmp))) {
357 mutex_unlock(&moxa_openlock);
Jiri Slaby74d7d972008-04-30 00:53:43 -0700358 return -EFAULT;
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700359 }
Jiri Slaby74d7d972008-04-30 00:53:43 -0700360 }
361 }
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700362 mutex_unlock(&moxa_openlock);
363 break;
Jiri Slaby74d7d972008-04-30 00:53:43 -0700364 }
365 case TIOCGSERIAL:
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700366 mutex_lock(&moxa_openlock);
367 ret = moxa_get_serial_info(ch, argp);
368 mutex_unlock(&moxa_openlock);
369 break;
Jiri Slaby74d7d972008-04-30 00:53:43 -0700370 case TIOCSSERIAL:
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700371 mutex_lock(&moxa_openlock);
372 ret = moxa_set_serial_info(ch, argp);
373 mutex_unlock(&moxa_openlock);
374 break;
375 default:
376 ret = -ENOIOCTLCMD;
Jiri Slaby74d7d972008-04-30 00:53:43 -0700377 }
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700378 return ret;
Jiri Slaby74d7d972008-04-30 00:53:43 -0700379}
380
Alan Cox9e989662008-07-22 11:18:03 +0100381static int moxa_break_ctl(struct tty_struct *tty, int state)
Jiri Slaby74d7d972008-04-30 00:53:43 -0700382{
383 struct moxa_port *port = tty->driver_data;
384
385 moxafunc(port->tableAddr, state ? FC_SendBreak : FC_StopBreak,
386 Magic_code);
Alan Cox9e989662008-07-22 11:18:03 +0100387 return 0;
Jiri Slaby74d7d972008-04-30 00:53:43 -0700388}
389
Jeff Dikeb68e31d2006-10-02 02:17:18 -0700390static const struct tty_operations moxa_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391 .open = moxa_open,
392 .close = moxa_close,
393 .write = moxa_write,
394 .write_room = moxa_write_room,
395 .flush_buffer = moxa_flush_buffer,
396 .chars_in_buffer = moxa_chars_in_buffer,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397 .ioctl = moxa_ioctl,
398 .throttle = moxa_throttle,
399 .unthrottle = moxa_unthrottle,
400 .set_termios = moxa_set_termios,
401 .stop = moxa_stop,
402 .start = moxa_start,
403 .hangup = moxa_hangup,
Jiri Slaby74d7d972008-04-30 00:53:43 -0700404 .break_ctl = moxa_break_ctl,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 .tiocmget = moxa_tiocmget,
406 .tiocmset = moxa_tiocmset,
407};
408
Alan Cox31f35932009-01-02 13:45:05 +0000409static const struct tty_port_operations moxa_port_ops = {
410 .carrier_raised = moxa_carrier_raised,
411};
412
Jiri Slabyaa7e5222007-02-10 01:45:27 -0800413static struct tty_driver *moxaDriver;
Jiri Slabyaa7e5222007-02-10 01:45:27 -0800414static DEFINE_TIMER(moxaTimer, moxa_poll, 0, 0);
Ingo Molnar34af9462006-06-27 02:53:55 -0700415static DEFINE_SPINLOCK(moxa_lock);
Alan Cox33f0f882006-01-09 20:54:13 -0800416
Jiri Slaby74d7d972008-04-30 00:53:43 -0700417/*
418 * HW init
419 */
420
Jiri Slaby03718232008-04-30 00:53:39 -0700421static int moxa_check_fw_model(struct moxa_board_conf *brd, u8 model)
422{
423 switch (brd->boardType) {
424 case MOXA_BOARD_C218_ISA:
425 case MOXA_BOARD_C218_PCI:
426 if (model != 1)
427 goto err;
428 break;
429 case MOXA_BOARD_CP204J:
430 if (model != 3)
431 goto err;
432 break;
433 default:
434 if (model != 2)
435 goto err;
436 break;
437 }
438 return 0;
439err:
440 return -EINVAL;
441}
442
443static int moxa_check_fw(const void *ptr)
444{
445 const __le16 *lptr = ptr;
446
447 if (*lptr != cpu_to_le16(0x7980))
448 return -EINVAL;
449
450 return 0;
451}
452
453static int moxa_load_bios(struct moxa_board_conf *brd, const u8 *buf,
454 size_t len)
455{
456 void __iomem *baseAddr = brd->basemem;
457 u16 tmp;
458
459 writeb(HW_reset, baseAddr + Control_reg); /* reset */
460 msleep(10);
461 memset_io(baseAddr, 0, 4096);
462 memcpy_toio(baseAddr, buf, len); /* download BIOS */
463 writeb(0, baseAddr + Control_reg); /* restart */
464
465 msleep(2000);
466
467 switch (brd->boardType) {
468 case MOXA_BOARD_C218_ISA:
469 case MOXA_BOARD_C218_PCI:
470 tmp = readw(baseAddr + C218_key);
471 if (tmp != C218_KeyCode)
472 goto err;
473 break;
474 case MOXA_BOARD_CP204J:
475 tmp = readw(baseAddr + C218_key);
476 if (tmp != CP204J_KeyCode)
477 goto err;
478 break;
479 default:
480 tmp = readw(baseAddr + C320_key);
481 if (tmp != C320_KeyCode)
482 goto err;
483 tmp = readw(baseAddr + C320_status);
484 if (tmp != STS_init) {
Jiri Slabyeaa95a82008-04-30 00:53:46 -0700485 printk(KERN_ERR "MOXA: bios upload failed -- CPU/Basic "
Jiri Slaby03718232008-04-30 00:53:39 -0700486 "module not found\n");
487 return -EIO;
488 }
489 break;
490 }
491
492 return 0;
493err:
Jiri Slabyeaa95a82008-04-30 00:53:46 -0700494 printk(KERN_ERR "MOXA: bios upload failed -- board not found\n");
Jiri Slaby03718232008-04-30 00:53:39 -0700495 return -EIO;
496}
497
498static int moxa_load_320b(struct moxa_board_conf *brd, const u8 *ptr,
499 size_t len)
500{
501 void __iomem *baseAddr = brd->basemem;
502
503 if (len < 7168) {
Jiri Slabyeaa95a82008-04-30 00:53:46 -0700504 printk(KERN_ERR "MOXA: invalid 320 bios -- too short\n");
Jiri Slaby03718232008-04-30 00:53:39 -0700505 return -EINVAL;
506 }
507
508 writew(len - 7168 - 2, baseAddr + C320bapi_len);
509 writeb(1, baseAddr + Control_reg); /* Select Page 1 */
510 memcpy_toio(baseAddr + DynPage_addr, ptr, 7168);
511 writeb(2, baseAddr + Control_reg); /* Select Page 2 */
512 memcpy_toio(baseAddr + DynPage_addr, ptr + 7168, len - 7168);
513
514 return 0;
515}
516
Jiri Slaby5292bcd2008-04-30 00:53:39 -0700517static int moxa_real_load_code(struct moxa_board_conf *brd, const void *ptr,
Jiri Slaby03718232008-04-30 00:53:39 -0700518 size_t len)
519{
520 void __iomem *baseAddr = brd->basemem;
Harvey Harrisonb46f69c2008-10-15 22:04:19 -0700521 const __le16 *uptr = ptr;
Jiri Slaby03718232008-04-30 00:53:39 -0700522 size_t wlen, len2, j;
Jiri Slaby5292bcd2008-04-30 00:53:39 -0700523 unsigned long key, loadbuf, loadlen, checksum, checksum_ok;
Jiri Slaby08d01c72008-04-30 00:53:47 -0700524 unsigned int i, retry;
Jiri Slaby03718232008-04-30 00:53:39 -0700525 u16 usum, keycode;
526
Jiri Slaby5292bcd2008-04-30 00:53:39 -0700527 keycode = (brd->boardType == MOXA_BOARD_CP204J) ? CP204J_KeyCode :
528 C218_KeyCode;
529
530 switch (brd->boardType) {
531 case MOXA_BOARD_CP204J:
532 case MOXA_BOARD_C218_ISA:
533 case MOXA_BOARD_C218_PCI:
534 key = C218_key;
535 loadbuf = C218_LoadBuf;
536 loadlen = C218DLoad_len;
537 checksum = C218check_sum;
538 checksum_ok = C218chksum_ok;
539 break;
540 default:
541 key = C320_key;
542 keycode = C320_KeyCode;
543 loadbuf = C320_LoadBuf;
544 loadlen = C320DLoad_len;
545 checksum = C320check_sum;
546 checksum_ok = C320chksum_ok;
547 break;
548 }
549
Jiri Slaby03718232008-04-30 00:53:39 -0700550 usum = 0;
551 wlen = len >> 1;
552 for (i = 0; i < wlen; i++)
553 usum += le16_to_cpu(uptr[i]);
554 retry = 0;
555 do {
556 wlen = len >> 1;
557 j = 0;
558 while (wlen) {
559 len2 = (wlen > 2048) ? 2048 : wlen;
560 wlen -= len2;
Jiri Slaby5292bcd2008-04-30 00:53:39 -0700561 memcpy_toio(baseAddr + loadbuf, ptr + j, len2 << 1);
Jiri Slaby03718232008-04-30 00:53:39 -0700562 j += len2 << 1;
563
Jiri Slaby5292bcd2008-04-30 00:53:39 -0700564 writew(len2, baseAddr + loadlen);
565 writew(0, baseAddr + key);
Jiri Slaby03718232008-04-30 00:53:39 -0700566 for (i = 0; i < 100; i++) {
Jiri Slaby5292bcd2008-04-30 00:53:39 -0700567 if (readw(baseAddr + key) == keycode)
Jiri Slaby03718232008-04-30 00:53:39 -0700568 break;
569 msleep(10);
570 }
Jiri Slaby5292bcd2008-04-30 00:53:39 -0700571 if (readw(baseAddr + key) != keycode)
Jiri Slaby03718232008-04-30 00:53:39 -0700572 return -EIO;
573 }
Jiri Slaby5292bcd2008-04-30 00:53:39 -0700574 writew(0, baseAddr + loadlen);
575 writew(usum, baseAddr + checksum);
576 writew(0, baseAddr + key);
Jiri Slaby03718232008-04-30 00:53:39 -0700577 for (i = 0; i < 100; i++) {
Jiri Slaby5292bcd2008-04-30 00:53:39 -0700578 if (readw(baseAddr + key) == keycode)
Jiri Slaby03718232008-04-30 00:53:39 -0700579 break;
580 msleep(10);
581 }
582 retry++;
Jiri Slaby5292bcd2008-04-30 00:53:39 -0700583 } while ((readb(baseAddr + checksum_ok) != 1) && (retry < 3));
584 if (readb(baseAddr + checksum_ok) != 1)
Jiri Slaby03718232008-04-30 00:53:39 -0700585 return -EIO;
586
Jiri Slaby5292bcd2008-04-30 00:53:39 -0700587 writew(0, baseAddr + key);
Jiri Slaby03718232008-04-30 00:53:39 -0700588 for (i = 0; i < 600; i++) {
589 if (readw(baseAddr + Magic_no) == Magic_code)
590 break;
591 msleep(10);
592 }
593 if (readw(baseAddr + Magic_no) != Magic_code)
594 return -EIO;
595
Jiri Slaby08d01c72008-04-30 00:53:47 -0700596 if (MOXA_IS_320(brd)) {
Jiri Slaby5292bcd2008-04-30 00:53:39 -0700597 if (brd->busType == MOXA_BUS_TYPE_PCI) { /* ASIC board */
598 writew(0x3800, baseAddr + TMS320_PORT1);
599 writew(0x3900, baseAddr + TMS320_PORT2);
600 writew(28499, baseAddr + TMS320_CLOCK);
601 } else {
602 writew(0x3200, baseAddr + TMS320_PORT1);
603 writew(0x3400, baseAddr + TMS320_PORT2);
604 writew(19999, baseAddr + TMS320_CLOCK);
605 }
Jiri Slaby03718232008-04-30 00:53:39 -0700606 }
607 writew(1, baseAddr + Disable_IRQ);
608 writew(0, baseAddr + Magic_no);
609 for (i = 0; i < 500; i++) {
610 if (readw(baseAddr + Magic_no) == Magic_code)
611 break;
612 msleep(10);
613 }
614 if (readw(baseAddr + Magic_no) != Magic_code)
615 return -EIO;
616
Jiri Slaby08d01c72008-04-30 00:53:47 -0700617 if (MOXA_IS_320(brd)) {
Jiri Slaby5292bcd2008-04-30 00:53:39 -0700618 j = readw(baseAddr + Module_cnt);
619 if (j <= 0)
620 return -EIO;
621 brd->numPorts = j * 8;
622 writew(j, baseAddr + Module_no);
623 writew(0, baseAddr + Magic_no);
624 for (i = 0; i < 600; i++) {
625 if (readw(baseAddr + Magic_no) == Magic_code)
626 break;
627 msleep(10);
628 }
629 if (readw(baseAddr + Magic_no) != Magic_code)
630 return -EIO;
Jiri Slaby03718232008-04-30 00:53:39 -0700631 }
Jiri Slaby03718232008-04-30 00:53:39 -0700632 brd->intNdx = baseAddr + IRQindex;
633 brd->intPend = baseAddr + IRQpending;
634 brd->intTable = baseAddr + IRQtable;
635
636 return 0;
637}
638
639static int moxa_load_code(struct moxa_board_conf *brd, const void *ptr,
640 size_t len)
641{
642 void __iomem *ofsAddr, *baseAddr = brd->basemem;
643 struct moxa_port *port;
644 int retval, i;
645
646 if (len % 2) {
Jiri Slabyeaa95a82008-04-30 00:53:46 -0700647 printk(KERN_ERR "MOXA: bios length is not even\n");
Jiri Slaby03718232008-04-30 00:53:39 -0700648 return -EINVAL;
649 }
650
Jiri Slaby5292bcd2008-04-30 00:53:39 -0700651 retval = moxa_real_load_code(brd, ptr, len); /* may change numPorts */
652 if (retval)
653 return retval;
654
Jiri Slaby03718232008-04-30 00:53:39 -0700655 switch (brd->boardType) {
656 case MOXA_BOARD_C218_ISA:
657 case MOXA_BOARD_C218_PCI:
658 case MOXA_BOARD_CP204J:
Jiri Slaby03718232008-04-30 00:53:39 -0700659 port = brd->ports;
660 for (i = 0; i < brd->numPorts; i++, port++) {
Jiri Slabyb4173f42008-04-30 00:53:40 -0700661 port->board = brd;
Jiri Slaby03718232008-04-30 00:53:39 -0700662 port->DCDState = 0;
663 port->tableAddr = baseAddr + Extern_table +
664 Extern_size * i;
665 ofsAddr = port->tableAddr;
666 writew(C218rx_mask, ofsAddr + RX_mask);
667 writew(C218tx_mask, ofsAddr + TX_mask);
668 writew(C218rx_spage + i * C218buf_pageno, ofsAddr + Page_rxb);
669 writew(readw(ofsAddr + Page_rxb) + C218rx_pageno, ofsAddr + EndPage_rxb);
670
671 writew(C218tx_spage + i * C218buf_pageno, ofsAddr + Page_txb);
672 writew(readw(ofsAddr + Page_txb) + C218tx_pageno, ofsAddr + EndPage_txb);
673
674 }
675 break;
676 default:
Jiri Slaby03718232008-04-30 00:53:39 -0700677 port = brd->ports;
678 for (i = 0; i < brd->numPorts; i++, port++) {
Jiri Slabyb4173f42008-04-30 00:53:40 -0700679 port->board = brd;
Jiri Slaby03718232008-04-30 00:53:39 -0700680 port->DCDState = 0;
681 port->tableAddr = baseAddr + Extern_table +
682 Extern_size * i;
683 ofsAddr = port->tableAddr;
684 switch (brd->numPorts) {
685 case 8:
686 writew(C320p8rx_mask, ofsAddr + RX_mask);
687 writew(C320p8tx_mask, ofsAddr + TX_mask);
688 writew(C320p8rx_spage + i * C320p8buf_pgno, ofsAddr + Page_rxb);
689 writew(readw(ofsAddr + Page_rxb) + C320p8rx_pgno, ofsAddr + EndPage_rxb);
690 writew(C320p8tx_spage + i * C320p8buf_pgno, ofsAddr + Page_txb);
691 writew(readw(ofsAddr + Page_txb) + C320p8tx_pgno, ofsAddr + EndPage_txb);
692
693 break;
694 case 16:
695 writew(C320p16rx_mask, ofsAddr + RX_mask);
696 writew(C320p16tx_mask, ofsAddr + TX_mask);
697 writew(C320p16rx_spage + i * C320p16buf_pgno, ofsAddr + Page_rxb);
698 writew(readw(ofsAddr + Page_rxb) + C320p16rx_pgno, ofsAddr + EndPage_rxb);
699 writew(C320p16tx_spage + i * C320p16buf_pgno, ofsAddr + Page_txb);
700 writew(readw(ofsAddr + Page_txb) + C320p16tx_pgno, ofsAddr + EndPage_txb);
701 break;
702
703 case 24:
704 writew(C320p24rx_mask, ofsAddr + RX_mask);
705 writew(C320p24tx_mask, ofsAddr + TX_mask);
706 writew(C320p24rx_spage + i * C320p24buf_pgno, ofsAddr + Page_rxb);
707 writew(readw(ofsAddr + Page_rxb) + C320p24rx_pgno, ofsAddr + EndPage_rxb);
708 writew(C320p24tx_spage + i * C320p24buf_pgno, ofsAddr + Page_txb);
709 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
710 break;
711 case 32:
712 writew(C320p32rx_mask, ofsAddr + RX_mask);
713 writew(C320p32tx_mask, ofsAddr + TX_mask);
714 writew(C320p32tx_ofs, ofsAddr + Ofs_txb);
715 writew(C320p32rx_spage + i * C320p32buf_pgno, ofsAddr + Page_rxb);
716 writew(readb(ofsAddr + Page_rxb), ofsAddr + EndPage_rxb);
717 writew(C320p32tx_spage + i * C320p32buf_pgno, ofsAddr + Page_txb);
718 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
719 break;
720 }
721 }
722 break;
723 }
Jiri Slaby03718232008-04-30 00:53:39 -0700724 return 0;
725}
726
727static int moxa_load_fw(struct moxa_board_conf *brd, const struct firmware *fw)
728{
David Howells2bca76e2008-07-08 17:37:15 +0100729 const void *ptr = fw->data;
Jiri Slaby03718232008-04-30 00:53:39 -0700730 char rsn[64];
731 u16 lens[5];
732 size_t len;
733 unsigned int a, lenp, lencnt;
734 int ret = -EINVAL;
735 struct {
736 __le32 magic; /* 0x34303430 */
737 u8 reserved1[2];
738 u8 type; /* UNIX = 3 */
739 u8 model; /* C218T=1, C320T=2, CP204=3 */
740 u8 reserved2[8];
741 __le16 len[5];
David Howells2bca76e2008-07-08 17:37:15 +0100742 } const *hdr = ptr;
Jiri Slaby03718232008-04-30 00:53:39 -0700743
744 BUILD_BUG_ON(ARRAY_SIZE(hdr->len) != ARRAY_SIZE(lens));
745
746 if (fw->size < MOXA_FW_HDRLEN) {
747 strcpy(rsn, "too short (even header won't fit)");
748 goto err;
749 }
750 if (hdr->magic != cpu_to_le32(0x30343034)) {
751 sprintf(rsn, "bad magic: %.8x", le32_to_cpu(hdr->magic));
752 goto err;
753 }
754 if (hdr->type != 3) {
755 sprintf(rsn, "not for linux, type is %u", hdr->type);
756 goto err;
757 }
758 if (moxa_check_fw_model(brd, hdr->model)) {
759 sprintf(rsn, "not for this card, model is %u", hdr->model);
760 goto err;
761 }
762
763 len = MOXA_FW_HDRLEN;
764 lencnt = hdr->model == 2 ? 5 : 3;
765 for (a = 0; a < ARRAY_SIZE(lens); a++) {
766 lens[a] = le16_to_cpu(hdr->len[a]);
767 if (lens[a] && len + lens[a] <= fw->size &&
768 moxa_check_fw(&fw->data[len]))
Jiri Slabyeaa95a82008-04-30 00:53:46 -0700769 printk(KERN_WARNING "MOXA firmware: unexpected input "
Jiri Slaby03718232008-04-30 00:53:39 -0700770 "at offset %u, but going on\n", (u32)len);
771 if (!lens[a] && a < lencnt) {
772 sprintf(rsn, "too few entries in fw file");
773 goto err;
774 }
775 len += lens[a];
776 }
777
778 if (len != fw->size) {
779 sprintf(rsn, "bad length: %u (should be %u)", (u32)fw->size,
780 (u32)len);
781 goto err;
782 }
783
784 ptr += MOXA_FW_HDRLEN;
785 lenp = 0; /* bios */
786
787 strcpy(rsn, "read above");
788
789 ret = moxa_load_bios(brd, ptr, lens[lenp]);
790 if (ret)
791 goto err;
792
793 /* we skip the tty section (lens[1]), since we don't need it */
794 ptr += lens[lenp] + lens[lenp + 1];
795 lenp += 2; /* comm */
796
797 if (hdr->model == 2) {
798 ret = moxa_load_320b(brd, ptr, lens[lenp]);
799 if (ret)
800 goto err;
801 /* skip another tty */
802 ptr += lens[lenp] + lens[lenp + 1];
803 lenp += 2;
804 }
805
806 ret = moxa_load_code(brd, ptr, lens[lenp]);
807 if (ret)
808 goto err;
809
810 return 0;
811err:
812 printk(KERN_ERR "firmware failed to load, reason: %s\n", rsn);
813 return ret;
814}
815
816static int moxa_init_board(struct moxa_board_conf *brd, struct device *dev)
817{
818 const struct firmware *fw;
819 const char *file;
Jiri Slaby810ab092008-04-30 00:53:41 -0700820 struct moxa_port *p;
821 unsigned int i;
Jiri Slaby03718232008-04-30 00:53:39 -0700822 int ret;
823
Jiri Slaby810ab092008-04-30 00:53:41 -0700824 brd->ports = kcalloc(MAX_PORTS_PER_BOARD, sizeof(*brd->ports),
825 GFP_KERNEL);
826 if (brd->ports == NULL) {
827 printk(KERN_ERR "cannot allocate memory for ports\n");
828 ret = -ENOMEM;
829 goto err;
830 }
831
832 for (i = 0, p = brd->ports; i < MAX_PORTS_PER_BOARD; i++, p++) {
Alan Cox9de6a512008-07-16 21:56:02 +0100833 tty_port_init(&p->port);
Alan Cox31f35932009-01-02 13:45:05 +0000834 p->port.ops = &moxa_port_ops;
Alan Cox44b7d1b2008-07-16 21:57:18 +0100835 p->type = PORT_16550A;
836 p->cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
Jiri Slaby810ab092008-04-30 00:53:41 -0700837 }
838
Jiri Slaby03718232008-04-30 00:53:39 -0700839 switch (brd->boardType) {
840 case MOXA_BOARD_C218_ISA:
841 case MOXA_BOARD_C218_PCI:
842 file = "c218tunx.cod";
843 break;
844 case MOXA_BOARD_CP204J:
845 file = "cp204unx.cod";
846 break;
847 default:
848 file = "c320tunx.cod";
849 break;
850 }
851
852 ret = request_firmware(&fw, file, dev);
853 if (ret) {
Jiri Slabyec09cd52008-04-30 00:53:49 -0700854 printk(KERN_ERR "MOXA: request_firmware failed. Make sure "
855 "you've placed '%s' file into your firmware "
856 "loader directory (e.g. /lib/firmware)\n",
857 file);
Jiri Slaby810ab092008-04-30 00:53:41 -0700858 goto err_free;
Jiri Slaby03718232008-04-30 00:53:39 -0700859 }
860
861 ret = moxa_load_fw(brd, fw);
862
863 release_firmware(fw);
Jiri Slaby810ab092008-04-30 00:53:41 -0700864
865 if (ret)
866 goto err_free;
867
Jiri Slaby2a541342008-04-30 00:53:45 -0700868 spin_lock_bh(&moxa_lock);
Jiri Slaby810ab092008-04-30 00:53:41 -0700869 brd->ready = 1;
Jiri Slaby0bcc4ca2008-04-30 00:53:42 -0700870 if (!timer_pending(&moxaTimer))
871 mod_timer(&moxaTimer, jiffies + HZ / 50);
Jiri Slaby2a541342008-04-30 00:53:45 -0700872 spin_unlock_bh(&moxa_lock);
Jiri Slaby0bcc4ca2008-04-30 00:53:42 -0700873
Jiri Slaby810ab092008-04-30 00:53:41 -0700874 return 0;
875err_free:
876 kfree(brd->ports);
877err:
Jiri Slaby03718232008-04-30 00:53:39 -0700878 return ret;
879}
880
Jiri Slaby810ab092008-04-30 00:53:41 -0700881static void moxa_board_deinit(struct moxa_board_conf *brd)
882{
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700883 unsigned int a, opened;
884
885 mutex_lock(&moxa_openlock);
Jiri Slaby7bcf97d2008-04-30 00:53:43 -0700886 spin_lock_bh(&moxa_lock);
Jiri Slaby810ab092008-04-30 00:53:41 -0700887 brd->ready = 0;
Jiri Slaby7bcf97d2008-04-30 00:53:43 -0700888 spin_unlock_bh(&moxa_lock);
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700889
890 /* pci hot-un-plug support */
891 for (a = 0; a < brd->numPorts; a++)
Alan Coxd450b5a2008-10-13 10:39:58 +0100892 if (brd->ports[a].port.flags & ASYNC_INITIALIZED) {
893 struct tty_struct *tty = tty_port_tty_get(
894 &brd->ports[a].port);
895 if (tty) {
896 tty_hangup(tty);
897 tty_kref_put(tty);
898 }
899 }
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700900 while (1) {
901 opened = 0;
902 for (a = 0; a < brd->numPorts; a++)
Alan Cox9de6a512008-07-16 21:56:02 +0100903 if (brd->ports[a].port.flags & ASYNC_INITIALIZED)
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700904 opened++;
905 mutex_unlock(&moxa_openlock);
906 if (!opened)
907 break;
908 msleep(50);
909 mutex_lock(&moxa_openlock);
910 }
911
Jiri Slaby810ab092008-04-30 00:53:41 -0700912 iounmap(brd->basemem);
913 brd->basemem = NULL;
914 kfree(brd->ports);
915}
916
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917#ifdef CONFIG_PCI
Jiri Slaby9cde5bf2007-02-10 01:45:35 -0800918static int __devinit moxa_pci_probe(struct pci_dev *pdev,
919 const struct pci_device_id *ent)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920{
Jiri Slaby9cde5bf2007-02-10 01:45:35 -0800921 struct moxa_board_conf *board;
922 unsigned int i;
923 int board_type = ent->driver_data;
924 int retval;
925
926 retval = pci_enable_device(pdev);
Jiri Slaby7aeb95d2007-10-18 03:06:24 -0700927 if (retval) {
928 dev_err(&pdev->dev, "can't enable pci device\n");
Jiri Slaby9cde5bf2007-02-10 01:45:35 -0800929 goto err;
Jiri Slaby7aeb95d2007-10-18 03:06:24 -0700930 }
Jiri Slaby9cde5bf2007-02-10 01:45:35 -0800931
932 for (i = 0; i < MAX_BOARDS; i++)
933 if (moxa_boards[i].basemem == NULL)
934 break;
935
936 retval = -ENODEV;
937 if (i >= MAX_BOARDS) {
Jiri Slaby7aeb95d2007-10-18 03:06:24 -0700938 dev_warn(&pdev->dev, "more than %u MOXA Intellio family boards "
Jiri Slaby9cde5bf2007-02-10 01:45:35 -0800939 "found. Board is ignored.\n", MAX_BOARDS);
940 goto err;
941 }
942
943 board = &moxa_boards[i];
Jiri Slabye46a5e32008-04-30 00:53:37 -0700944
945 retval = pci_request_region(pdev, 2, "moxa-base");
946 if (retval) {
947 dev_err(&pdev->dev, "can't request pci region 2\n");
948 goto err;
949 }
950
Alan Cox24cb2332008-04-30 00:54:19 -0700951 board->basemem = ioremap_nocache(pci_resource_start(pdev, 2), 0x4000);
Jiri Slaby7aeb95d2007-10-18 03:06:24 -0700952 if (board->basemem == NULL) {
953 dev_err(&pdev->dev, "can't remap io space 2\n");
Jiri Slabye46a5e32008-04-30 00:53:37 -0700954 goto err_reg;
Jiri Slaby7aeb95d2007-10-18 03:06:24 -0700955 }
Jiri Slaby9cde5bf2007-02-10 01:45:35 -0800956
Linus Torvalds1da177e2005-04-16 15:20:36 -0700957 board->boardType = board_type;
958 switch (board_type) {
959 case MOXA_BOARD_C218_ISA:
960 case MOXA_BOARD_C218_PCI:
961 board->numPorts = 8;
962 break;
963
964 case MOXA_BOARD_CP204J:
965 board->numPorts = 4;
966 break;
967 default:
968 board->numPorts = 0;
969 break;
970 }
971 board->busType = MOXA_BUS_TYPE_PCI;
Jiri Slabya784bf72007-02-10 01:45:36 -0800972
Jiri Slaby03718232008-04-30 00:53:39 -0700973 retval = moxa_init_board(board, &pdev->dev);
974 if (retval)
975 goto err_base;
976
Jiri Slaby9cde5bf2007-02-10 01:45:35 -0800977 pci_set_drvdata(pdev, board);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700978
Jiri Slabybb9f9102008-04-30 00:53:48 -0700979 dev_info(&pdev->dev, "board '%s' ready (%u ports, firmware loaded)\n",
980 moxa_brdname[board_type - 1], board->numPorts);
981
Jiri Slabyeaa95a82008-04-30 00:53:46 -0700982 return 0;
Jiri Slaby03718232008-04-30 00:53:39 -0700983err_base:
984 iounmap(board->basemem);
985 board->basemem = NULL;
Jiri Slabye46a5e32008-04-30 00:53:37 -0700986err_reg:
987 pci_release_region(pdev, 2);
Jiri Slaby9cde5bf2007-02-10 01:45:35 -0800988err:
989 return retval;
990}
991
992static void __devexit moxa_pci_remove(struct pci_dev *pdev)
993{
994 struct moxa_board_conf *brd = pci_get_drvdata(pdev);
995
Jiri Slaby810ab092008-04-30 00:53:41 -0700996 moxa_board_deinit(brd);
997
Jiri Slabye46a5e32008-04-30 00:53:37 -0700998 pci_release_region(pdev, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700999}
Jiri Slabya784bf72007-02-10 01:45:36 -08001000
1001static struct pci_driver moxa_pci_driver = {
1002 .name = "moxa",
1003 .id_table = moxa_pcibrds,
1004 .probe = moxa_pci_probe,
1005 .remove = __devexit_p(moxa_pci_remove)
1006};
Linus Torvalds1da177e2005-04-16 15:20:36 -07001007#endif /* CONFIG_PCI */
1008
1009static int __init moxa_init(void)
1010{
Jiri Slaby810ab092008-04-30 00:53:41 -07001011 unsigned int isabrds = 0;
Jiri Slabyd353eca2008-04-30 00:53:37 -07001012 int retval = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001013
Jiri Slaby7aeb95d2007-10-18 03:06:24 -07001014 printk(KERN_INFO "MOXA Intellio family driver version %s\n",
1015 MOXA_VERSION);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001016 moxaDriver = alloc_tty_driver(MAX_PORTS + 1);
1017 if (!moxaDriver)
1018 return -ENOMEM;
1019
Linus Torvalds1da177e2005-04-16 15:20:36 -07001020 moxaDriver->owner = THIS_MODULE;
Sergey Vlasov9b4e3b12005-09-03 16:26:49 +01001021 moxaDriver->name = "ttyMX";
Linus Torvalds1da177e2005-04-16 15:20:36 -07001022 moxaDriver->major = ttymajor;
1023 moxaDriver->minor_start = 0;
1024 moxaDriver->type = TTY_DRIVER_TYPE_SERIAL;
1025 moxaDriver->subtype = SERIAL_TYPE_NORMAL;
1026 moxaDriver->init_termios = tty_std_termios;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001027 moxaDriver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
Alan Cox606d0992006-12-08 02:38:45 -08001028 moxaDriver->init_termios.c_ispeed = 9600;
1029 moxaDriver->init_termios.c_ospeed = 9600;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001030 moxaDriver->flags = TTY_DRIVER_REAL_RAW;
1031 tty_set_operations(moxaDriver, &moxa_ops);
1032
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033 if (tty_register_driver(moxaDriver)) {
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001034 printk(KERN_ERR "can't register MOXA Smartio tty driver!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001035 put_tty_driver(moxaDriver);
1036 return -1;
1037 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038
Jiri Slabyd353eca2008-04-30 00:53:37 -07001039 /* Find the boards defined from module args. */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001040#ifdef MODULE
Jiri Slabyd353eca2008-04-30 00:53:37 -07001041 {
1042 struct moxa_board_conf *brd = moxa_boards;
Jiri Slaby810ab092008-04-30 00:53:41 -07001043 unsigned int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001044 for (i = 0; i < MAX_BOARDS; i++) {
Jiri Slabyd353eca2008-04-30 00:53:37 -07001045 if (!baseaddr[i])
1046 break;
1047 if (type[i] == MOXA_BOARD_C218_ISA ||
1048 type[i] == MOXA_BOARD_C320_ISA) {
Jiri Slaby7aeb95d2007-10-18 03:06:24 -07001049 pr_debug("Moxa board %2d: %s board(baseAddr=%lx)\n",
Jiri Slabyd353eca2008-04-30 00:53:37 -07001050 isabrds + 1, moxa_brdname[type[i] - 1],
1051 baseaddr[i]);
1052 brd->boardType = type[i];
1053 brd->numPorts = type[i] == MOXA_BOARD_C218_ISA ? 8 :
1054 numports[i];
1055 brd->busType = MOXA_BUS_TYPE_ISA;
Alan Cox24cb2332008-04-30 00:54:19 -07001056 brd->basemem = ioremap_nocache(baseaddr[i], 0x4000);
Jiri Slabyd353eca2008-04-30 00:53:37 -07001057 if (!brd->basemem) {
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001058 printk(KERN_ERR "MOXA: can't remap %lx\n",
Jiri Slabyd353eca2008-04-30 00:53:37 -07001059 baseaddr[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001060 continue;
1061 }
Jiri Slaby03718232008-04-30 00:53:39 -07001062 if (moxa_init_board(brd, NULL)) {
1063 iounmap(brd->basemem);
1064 brd->basemem = NULL;
1065 continue;
1066 }
Jiri Slabyd353eca2008-04-30 00:53:37 -07001067
Jiri Slabybb9f9102008-04-30 00:53:48 -07001068 printk(KERN_INFO "MOXA isa board found at 0x%.8lu and "
1069 "ready (%u ports, firmware loaded)\n",
1070 baseaddr[i], brd->numPorts);
1071
Jiri Slabyd353eca2008-04-30 00:53:37 -07001072 brd++;
1073 isabrds++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001074 }
1075 }
Jiri Slabyd353eca2008-04-30 00:53:37 -07001076 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001077#endif
Jiri Slabya784bf72007-02-10 01:45:36 -08001078
Linus Torvalds1da177e2005-04-16 15:20:36 -07001079#ifdef CONFIG_PCI
Jiri Slabya784bf72007-02-10 01:45:36 -08001080 retval = pci_register_driver(&moxa_pci_driver);
1081 if (retval) {
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001082 printk(KERN_ERR "Can't register MOXA pci driver!\n");
Jiri Slabyd353eca2008-04-30 00:53:37 -07001083 if (isabrds)
Jiri Slabya784bf72007-02-10 01:45:36 -08001084 retval = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085 }
1086#endif
Jiri Slabya784bf72007-02-10 01:45:36 -08001087
Jiri Slabya784bf72007-02-10 01:45:36 -08001088 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001089}
1090
1091static void __exit moxa_exit(void)
1092{
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001093 unsigned int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001094
Jiri Slaby9cde5bf2007-02-10 01:45:35 -08001095#ifdef CONFIG_PCI
Jiri Slabya784bf72007-02-10 01:45:36 -08001096 pci_unregister_driver(&moxa_pci_driver);
Jiri Slaby9cde5bf2007-02-10 01:45:35 -08001097#endif
Jiri Slabya784bf72007-02-10 01:45:36 -08001098
Jiri Slaby810ab092008-04-30 00:53:41 -07001099 for (i = 0; i < MAX_BOARDS; i++) /* ISA boards */
1100 if (moxa_boards[i].ready)
1101 moxa_board_deinit(&moxa_boards[i]);
Jiri Slaby2a541342008-04-30 00:53:45 -07001102
1103 del_timer_sync(&moxaTimer);
1104
1105 if (tty_unregister_driver(moxaDriver))
1106 printk(KERN_ERR "Couldn't unregister MOXA Intellio family "
1107 "serial driver\n");
1108 put_tty_driver(moxaDriver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001109}
1110
1111module_init(moxa_init);
1112module_exit(moxa_exit);
1113
Alan Coxd450b5a2008-10-13 10:39:58 +01001114static void moxa_close_port(struct tty_struct *tty)
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001115{
Alan Coxd450b5a2008-10-13 10:39:58 +01001116 struct moxa_port *ch = tty->driver_data;
1117 moxa_shut_down(tty);
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001118 MoxaPortFlushData(ch, 2);
Alan Cox9de6a512008-07-16 21:56:02 +01001119 ch->port.flags &= ~ASYNC_NORMAL_ACTIVE;
Alan Coxd450b5a2008-10-13 10:39:58 +01001120 tty->driver_data = NULL;
1121 tty_port_tty_set(&ch->port, NULL);
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001122}
1123
Alan Cox31f35932009-01-02 13:45:05 +00001124static int moxa_carrier_raised(struct tty_port *port)
1125{
1126 struct moxa_port *ch = container_of(port, struct moxa_port, port);
1127 int dcd;
1128
1129 spin_lock_bh(&moxa_lock);
1130 dcd = ch->DCDState;
1131 spin_unlock_bh(&moxa_lock);
1132 return dcd;
1133}
1134
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001135static int moxa_block_till_ready(struct tty_struct *tty, struct file *filp,
1136 struct moxa_port *ch)
1137{
Alan Cox31f35932009-01-02 13:45:05 +00001138 struct tty_port *port = &ch->port;
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001139 DEFINE_WAIT(wait);
1140 int retval = 0;
1141 u8 dcd;
1142
1143 while (1) {
Alan Cox31f35932009-01-02 13:45:05 +00001144 prepare_to_wait(&port->open_wait, &wait, TASK_INTERRUPTIBLE);
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001145 if (tty_hung_up_p(filp)) {
1146#ifdef SERIAL_DO_RESTART
1147 retval = -ERESTARTSYS;
1148#else
1149 retval = -EAGAIN;
1150#endif
1151 break;
1152 }
Alan Cox31f35932009-01-02 13:45:05 +00001153 dcd = tty_port_carrier_raised(port);
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001154 if (dcd)
1155 break;
1156
1157 if (signal_pending(current)) {
1158 retval = -ERESTARTSYS;
1159 break;
1160 }
1161 schedule();
1162 }
Alan Cox31f35932009-01-02 13:45:05 +00001163 finish_wait(&port->open_wait, &wait);
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001164
1165 return retval;
1166}
1167
Linus Torvalds1da177e2005-04-16 15:20:36 -07001168static int moxa_open(struct tty_struct *tty, struct file *filp)
1169{
Jiri Slaby810ab092008-04-30 00:53:41 -07001170 struct moxa_board_conf *brd;
Jiri Slaby8f8ecba2007-02-10 01:45:33 -08001171 struct moxa_port *ch;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001172 int port;
1173 int retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001174
Jiri Slaby11324ed2007-02-10 01:45:31 -08001175 port = tty->index;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001176 if (port == MAX_PORTS) {
Jiri Slaby74d7d972008-04-30 00:53:43 -07001177 return capable(CAP_SYS_ADMIN) ? 0 : -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001178 }
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001179 if (mutex_lock_interruptible(&moxa_openlock))
1180 return -ERESTARTSYS;
Jiri Slaby810ab092008-04-30 00:53:41 -07001181 brd = &moxa_boards[port / MAX_PORTS_PER_BOARD];
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001182 if (!brd->ready) {
1183 mutex_unlock(&moxa_openlock);
Jiri Slaby810ab092008-04-30 00:53:41 -07001184 return -ENODEV;
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001185 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001186
Dirk Eibachf0e85272009-06-11 14:56:44 +01001187 if (port % MAX_PORTS_PER_BOARD >= brd->numPorts) {
1188 mutex_unlock(&moxa_openlock);
1189 return -ENODEV;
1190 }
1191
Jiri Slaby810ab092008-04-30 00:53:41 -07001192 ch = &brd->ports[port % MAX_PORTS_PER_BOARD];
Alan Cox9de6a512008-07-16 21:56:02 +01001193 ch->port.count++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194 tty->driver_data = ch;
Alan Coxd450b5a2008-10-13 10:39:58 +01001195 tty_port_tty_set(&ch->port, tty);
Alan Cox9de6a512008-07-16 21:56:02 +01001196 if (!(ch->port.flags & ASYNC_INITIALIZED)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001197 ch->statusflags = 0;
Alan Coxdb1acaa2008-02-08 04:18:43 -08001198 moxa_set_tty_param(tty, tty->termios);
Jiri Slabyb4173f42008-04-30 00:53:40 -07001199 MoxaPortLineCtrl(ch, 1, 1);
1200 MoxaPortEnable(ch);
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001201 MoxaSetFifo(ch, ch->type == PORT_16550A);
Alan Cox9de6a512008-07-16 21:56:02 +01001202 ch->port.flags |= ASYNC_INITIALIZED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001203 }
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001204 mutex_unlock(&moxa_openlock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001205
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001206 retval = 0;
1207 if (!(filp->f_flags & O_NONBLOCK) && !C_CLOCAL(tty))
1208 retval = moxa_block_till_ready(tty, filp, ch);
1209 mutex_lock(&moxa_openlock);
1210 if (retval) {
Alan Cox9de6a512008-07-16 21:56:02 +01001211 if (ch->port.count) /* 0 means already hung up... */
1212 if (--ch->port.count == 0)
Alan Coxd450b5a2008-10-13 10:39:58 +01001213 moxa_close_port(tty);
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001214 } else
Alan Cox9de6a512008-07-16 21:56:02 +01001215 ch->port.flags |= ASYNC_NORMAL_ACTIVE;
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001216 mutex_unlock(&moxa_openlock);
Linus Torvalds752a4782009-06-22 11:24:43 -07001217
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001218 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001219}
1220
1221static void moxa_close(struct tty_struct *tty, struct file *filp)
1222{
Jiri Slaby8f8ecba2007-02-10 01:45:33 -08001223 struct moxa_port *ch;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001224 int port;
1225
Jiri Slaby11324ed2007-02-10 01:45:31 -08001226 port = tty->index;
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001227 if (port == MAX_PORTS || tty_hung_up_p(filp))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001228 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001229
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001230 mutex_lock(&moxa_openlock);
1231 ch = tty->driver_data;
1232 if (ch == NULL)
1233 goto unlock;
Alan Cox9de6a512008-07-16 21:56:02 +01001234 if (tty->count == 1 && ch->port.count != 1) {
Jiri Slaby7aeb95d2007-10-18 03:06:24 -07001235 printk(KERN_WARNING "moxa_close: bad serial port count; "
Alan Cox9de6a512008-07-16 21:56:02 +01001236 "tty->count is 1, ch->port.count is %d\n", ch->port.count);
1237 ch->port.count = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001238 }
Alan Cox9de6a512008-07-16 21:56:02 +01001239 if (--ch->port.count < 0) {
Jiri Slaby7aeb95d2007-10-18 03:06:24 -07001240 printk(KERN_WARNING "moxa_close: bad serial port count, "
1241 "device=%s\n", tty->name);
Alan Cox9de6a512008-07-16 21:56:02 +01001242 ch->port.count = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001243 }
Alan Cox9de6a512008-07-16 21:56:02 +01001244 if (ch->port.count)
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001245 goto unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001246
1247 ch->cflag = tty->termios->c_cflag;
Alan Cox9de6a512008-07-16 21:56:02 +01001248 if (ch->port.flags & ASYNC_INITIALIZED) {
Jiri Slaby6f56b652007-10-18 03:06:24 -07001249 moxa_setup_empty_event(tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001250 tty_wait_until_sent(tty, 30 * HZ); /* 30 seconds timeout */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001251 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001252
Alan Coxd450b5a2008-10-13 10:39:58 +01001253 moxa_close_port(tty);
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001254unlock:
1255 mutex_unlock(&moxa_openlock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001256}
1257
1258static int moxa_write(struct tty_struct *tty,
1259 const unsigned char *buf, int count)
1260{
Jiri Slabyb4173f42008-04-30 00:53:40 -07001261 struct moxa_port *ch = tty->driver_data;
Jiri Slabyb4173f42008-04-30 00:53:40 -07001262 int len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001263
Linus Torvalds1da177e2005-04-16 15:20:36 -07001264 if (ch == NULL)
Jiri Slabyb4173f42008-04-30 00:53:40 -07001265 return 0;
Alan Cox33f0f882006-01-09 20:54:13 -08001266
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001267 spin_lock_bh(&moxa_lock);
Alan Coxd450b5a2008-10-13 10:39:58 +01001268 len = MoxaPortWriteData(tty, buf, count);
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001269 spin_unlock_bh(&moxa_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001270
Linus Torvalds1da177e2005-04-16 15:20:36 -07001271 ch->statusflags |= LOWWAIT;
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001272 return len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001273}
1274
1275static int moxa_write_room(struct tty_struct *tty)
1276{
Jiri Slaby8f8ecba2007-02-10 01:45:33 -08001277 struct moxa_port *ch;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001278
1279 if (tty->stopped)
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001280 return 0;
Jiri Slabyb4173f42008-04-30 00:53:40 -07001281 ch = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001282 if (ch == NULL)
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001283 return 0;
Jiri Slabyb4173f42008-04-30 00:53:40 -07001284 return MoxaPortTxFree(ch);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001285}
1286
1287static void moxa_flush_buffer(struct tty_struct *tty)
1288{
Jiri Slabyb4173f42008-04-30 00:53:40 -07001289 struct moxa_port *ch = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001290
1291 if (ch == NULL)
1292 return;
Jiri Slabyb4173f42008-04-30 00:53:40 -07001293 MoxaPortFlushData(ch, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001294 tty_wakeup(tty);
1295}
1296
1297static int moxa_chars_in_buffer(struct tty_struct *tty)
1298{
Jiri Slabyb4173f42008-04-30 00:53:40 -07001299 struct moxa_port *ch = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001300 int chars;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001301
1302 /*
1303 * Sigh...I have to check if driver_data is NULL here, because
1304 * if an open() fails, the TTY subsystem eventually calls
1305 * tty_wait_until_sent(), which calls the driver's chars_in_buffer()
1306 * routine. And since the open() failed, we return 0 here. TDJ
1307 */
1308 if (ch == NULL)
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001309 return 0;
Alan Cox978e5952008-04-30 00:53:59 -07001310 lock_kernel();
Jiri Slabyb4173f42008-04-30 00:53:40 -07001311 chars = MoxaPortTxQueue(ch);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001312 if (chars) {
1313 /*
1314 * Make it possible to wakeup anything waiting for output
1315 * in tty_ioctl.c, etc.
1316 */
1317 if (!(ch->statusflags & EMPTYWAIT))
Jiri Slaby6f56b652007-10-18 03:06:24 -07001318 moxa_setup_empty_event(tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001319 }
Alan Cox978e5952008-04-30 00:53:59 -07001320 unlock_kernel();
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001321 return chars;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001322}
1323
Linus Torvalds1da177e2005-04-16 15:20:36 -07001324static int moxa_tiocmget(struct tty_struct *tty, struct file *file)
1325{
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001326 struct moxa_port *ch;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001327 int flag = 0, dtr, rts;
1328
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001329 mutex_lock(&moxa_openlock);
1330 ch = tty->driver_data;
1331 if (!ch) {
1332 mutex_unlock(&moxa_openlock);
Jiri Slaby74d7d972008-04-30 00:53:43 -07001333 return -EINVAL;
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001334 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001335
Jiri Slabyb4173f42008-04-30 00:53:40 -07001336 MoxaPortGetLineOut(ch, &dtr, &rts);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001337 if (dtr)
1338 flag |= TIOCM_DTR;
1339 if (rts)
1340 flag |= TIOCM_RTS;
Jiri Slabyb4173f42008-04-30 00:53:40 -07001341 dtr = MoxaPortLineStatus(ch);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001342 if (dtr & 1)
1343 flag |= TIOCM_CTS;
1344 if (dtr & 2)
1345 flag |= TIOCM_DSR;
1346 if (dtr & 4)
1347 flag |= TIOCM_CD;
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001348 mutex_unlock(&moxa_openlock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001349 return flag;
1350}
1351
1352static int moxa_tiocmset(struct tty_struct *tty, struct file *file,
1353 unsigned int set, unsigned int clear)
1354{
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001355 struct moxa_port *ch;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001356 int port;
1357 int dtr, rts;
1358
Jiri Slaby11324ed2007-02-10 01:45:31 -08001359 port = tty->index;
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001360 mutex_lock(&moxa_openlock);
1361 ch = tty->driver_data;
1362 if (!ch) {
1363 mutex_unlock(&moxa_openlock);
Jiri Slaby74d7d972008-04-30 00:53:43 -07001364 return -EINVAL;
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001365 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001366
Jiri Slabyb4173f42008-04-30 00:53:40 -07001367 MoxaPortGetLineOut(ch, &dtr, &rts);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001368 if (set & TIOCM_RTS)
1369 rts = 1;
1370 if (set & TIOCM_DTR)
1371 dtr = 1;
1372 if (clear & TIOCM_RTS)
1373 rts = 0;
1374 if (clear & TIOCM_DTR)
1375 dtr = 0;
Jiri Slabyb4173f42008-04-30 00:53:40 -07001376 MoxaPortLineCtrl(ch, dtr, rts);
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001377 mutex_unlock(&moxa_openlock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001378 return 0;
1379}
1380
Linus Torvalds1da177e2005-04-16 15:20:36 -07001381static void moxa_throttle(struct tty_struct *tty)
1382{
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001383 struct moxa_port *ch = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001384
1385 ch->statusflags |= THROTTLE;
1386}
1387
1388static void moxa_unthrottle(struct tty_struct *tty)
1389{
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001390 struct moxa_port *ch = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001391
1392 ch->statusflags &= ~THROTTLE;
1393}
1394
1395static void moxa_set_termios(struct tty_struct *tty,
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001396 struct ktermios *old_termios)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001397{
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001398 struct moxa_port *ch = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001399
1400 if (ch == NULL)
1401 return;
Alan Coxdb1acaa2008-02-08 04:18:43 -08001402 moxa_set_tty_param(tty, old_termios);
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001403 if (!(old_termios->c_cflag & CLOCAL) && C_CLOCAL(tty))
Alan Cox9de6a512008-07-16 21:56:02 +01001404 wake_up_interruptible(&ch->port.open_wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001405}
1406
1407static void moxa_stop(struct tty_struct *tty)
1408{
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001409 struct moxa_port *ch = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001410
1411 if (ch == NULL)
1412 return;
Jiri Slabyb4173f42008-04-30 00:53:40 -07001413 MoxaPortTxDisable(ch);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001414 ch->statusflags |= TXSTOPPED;
1415}
1416
1417
1418static void moxa_start(struct tty_struct *tty)
1419{
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001420 struct moxa_port *ch = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001421
1422 if (ch == NULL)
1423 return;
1424
1425 if (!(ch->statusflags & TXSTOPPED))
1426 return;
1427
Jiri Slabyb4173f42008-04-30 00:53:40 -07001428 MoxaPortTxEnable(ch);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001429 ch->statusflags &= ~TXSTOPPED;
1430}
1431
1432static void moxa_hangup(struct tty_struct *tty)
1433{
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001434 struct moxa_port *ch;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001435
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001436 mutex_lock(&moxa_openlock);
1437 ch = tty->driver_data;
1438 if (ch == NULL) {
1439 mutex_unlock(&moxa_openlock);
1440 return;
1441 }
Alan Cox9de6a512008-07-16 21:56:02 +01001442 ch->port.count = 0;
Alan Coxd450b5a2008-10-13 10:39:58 +01001443 moxa_close_port(tty);
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001444 mutex_unlock(&moxa_openlock);
1445
Alan Cox9de6a512008-07-16 21:56:02 +01001446 wake_up_interruptible(&ch->port.open_wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001447}
1448
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001449static void moxa_new_dcdstate(struct moxa_port *p, u8 dcd)
1450{
Alan Coxd450b5a2008-10-13 10:39:58 +01001451 struct tty_struct *tty;
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001452 dcd = !!dcd;
1453
Alan Coxd450b5a2008-10-13 10:39:58 +01001454 if (dcd != p->DCDState) {
1455 tty = tty_port_tty_get(&p->port);
1456 if (tty && C_CLOCAL(tty) && !dcd)
1457 tty_hangup(tty);
1458 tty_kref_put(tty);
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001459 }
1460 p->DCDState = dcd;
1461}
1462
1463static int moxa_poll_port(struct moxa_port *p, unsigned int handle,
1464 u16 __iomem *ip)
1465{
Alan Coxd450b5a2008-10-13 10:39:58 +01001466 struct tty_struct *tty = tty_port_tty_get(&p->port);
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001467 void __iomem *ofsAddr;
Alan Cox9de6a512008-07-16 21:56:02 +01001468 unsigned int inited = p->port.flags & ASYNC_INITIALIZED;
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001469 u16 intr;
1470
1471 if (tty) {
1472 if ((p->statusflags & EMPTYWAIT) &&
1473 MoxaPortTxQueue(p) == 0) {
1474 p->statusflags &= ~EMPTYWAIT;
1475 tty_wakeup(tty);
1476 }
1477 if ((p->statusflags & LOWWAIT) && !tty->stopped &&
1478 MoxaPortTxQueue(p) <= WAKEUP_CHARS) {
1479 p->statusflags &= ~LOWWAIT;
1480 tty_wakeup(tty);
1481 }
1482
1483 if (inited && !(p->statusflags & THROTTLE) &&
1484 MoxaPortRxQueue(p) > 0) { /* RX */
1485 MoxaPortReadData(p);
1486 tty_schedule_flip(tty);
1487 }
1488 } else {
1489 p->statusflags &= ~EMPTYWAIT;
1490 MoxaPortFlushData(p, 0); /* flush RX */
1491 }
1492
1493 if (!handle) /* nothing else to do */
Jiri Slaby0e0fd7d2009-04-06 17:34:04 +01001494 goto put;
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001495
1496 intr = readw(ip); /* port irq status */
1497 if (intr == 0)
Jiri Slaby0e0fd7d2009-04-06 17:34:04 +01001498 goto put;
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001499
1500 writew(0, ip); /* ACK port */
1501 ofsAddr = p->tableAddr;
1502 if (intr & IntrTx) /* disable tx intr */
1503 writew(readw(ofsAddr + HostStat) & ~WakeupTx,
1504 ofsAddr + HostStat);
1505
1506 if (!inited)
Jiri Slaby0e0fd7d2009-04-06 17:34:04 +01001507 goto put;
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001508
1509 if (tty && (intr & IntrBreak) && !I_IGNBRK(tty)) { /* BREAK */
1510 tty_insert_flip_char(tty, 0, TTY_BREAK);
1511 tty_schedule_flip(tty);
1512 }
1513
1514 if (intr & IntrLine)
1515 moxa_new_dcdstate(p, readb(ofsAddr + FlagStat) & DCD_state);
Jiri Slaby0e0fd7d2009-04-06 17:34:04 +01001516put:
1517 tty_kref_put(tty);
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001518
1519 return 0;
1520}
1521
Linus Torvalds1da177e2005-04-16 15:20:36 -07001522static void moxa_poll(unsigned long ignored)
1523{
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001524 struct moxa_board_conf *brd;
1525 u16 __iomem *ip;
Jiri Slaby2a541342008-04-30 00:53:45 -07001526 unsigned int card, port, served = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001527
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001528 spin_lock(&moxa_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001529 for (card = 0; card < MAX_BOARDS; card++) {
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001530 brd = &moxa_boards[card];
1531 if (!brd->ready)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001532 continue;
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001533
Jiri Slaby2a541342008-04-30 00:53:45 -07001534 served++;
1535
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001536 ip = NULL;
1537 if (readb(brd->intPend) == 0xff)
1538 ip = brd->intTable + readb(brd->intNdx);
1539
1540 for (port = 0; port < brd->numPorts; port++)
1541 moxa_poll_port(&brd->ports[port], !!ip, ip + port);
1542
1543 if (ip)
1544 writeb(0, brd->intPend); /* ACK */
1545
1546 if (moxaLowWaterChk) {
1547 struct moxa_port *p = brd->ports;
1548 for (port = 0; port < brd->numPorts; port++, p++)
1549 if (p->lowChkFlag) {
1550 p->lowChkFlag = 0;
1551 moxa_low_water_check(p->tableAddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001552 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001553 }
1554 }
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001555 moxaLowWaterChk = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001556
Jiri Slaby2a541342008-04-30 00:53:45 -07001557 if (served)
1558 mod_timer(&moxaTimer, jiffies + HZ / 50);
1559 spin_unlock(&moxa_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001560}
1561
1562/******************************************************************************/
1563
Alan Coxdb1acaa2008-02-08 04:18:43 -08001564static void moxa_set_tty_param(struct tty_struct *tty, struct ktermios *old_termios)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001565{
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001566 register struct ktermios *ts = tty->termios;
1567 struct moxa_port *ch = tty->driver_data;
Alan Coxdb1acaa2008-02-08 04:18:43 -08001568 int rts, cts, txflow, rxflow, xany, baud;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001569
Linus Torvalds1da177e2005-04-16 15:20:36 -07001570 rts = cts = txflow = rxflow = xany = 0;
1571 if (ts->c_cflag & CRTSCTS)
1572 rts = cts = 1;
1573 if (ts->c_iflag & IXON)
1574 txflow = 1;
1575 if (ts->c_iflag & IXOFF)
1576 rxflow = 1;
1577 if (ts->c_iflag & IXANY)
1578 xany = 1;
Alan Coxdb1acaa2008-02-08 04:18:43 -08001579
1580 /* Clear the features we don't support */
1581 ts->c_cflag &= ~CMSPAR;
Jiri Slabyb4173f42008-04-30 00:53:40 -07001582 MoxaPortFlowCtrl(ch, rts, cts, txflow, rxflow, xany);
1583 baud = MoxaPortSetTermio(ch, ts, tty_get_baud_rate(tty));
Alan Coxdb1acaa2008-02-08 04:18:43 -08001584 if (baud == -1)
1585 baud = tty_termios_baud_rate(old_termios);
1586 /* Not put the baud rate into the termios data */
1587 tty_encode_baud_rate(tty, baud, baud);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001588}
1589
Jiri Slaby6f56b652007-10-18 03:06:24 -07001590static void moxa_setup_empty_event(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001591{
Jiri Slaby8f8ecba2007-02-10 01:45:33 -08001592 struct moxa_port *ch = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001593
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001594 spin_lock_bh(&moxa_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001595 ch->statusflags |= EMPTYWAIT;
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001596 spin_unlock_bh(&moxa_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001597}
1598
Alan Coxd450b5a2008-10-13 10:39:58 +01001599static void moxa_shut_down(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001600{
Alan Coxd450b5a2008-10-13 10:39:58 +01001601 struct moxa_port *ch = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001602
Alan Cox9de6a512008-07-16 21:56:02 +01001603 if (!(ch->port.flags & ASYNC_INITIALIZED))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001604 return;
1605
Jiri Slabyb4173f42008-04-30 00:53:40 -07001606 MoxaPortDisable(ch);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001607
1608 /*
1609 * If we're a modem control device and HUPCL is on, drop RTS & DTR.
1610 */
Alan Coxd450b5a2008-10-13 10:39:58 +01001611 if (C_HUPCL(tty))
Jiri Slabyb4173f42008-04-30 00:53:40 -07001612 MoxaPortLineCtrl(ch, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001613
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001614 spin_lock_bh(&moxa_lock);
Alan Cox9de6a512008-07-16 21:56:02 +01001615 ch->port.flags &= ~ASYNC_INITIALIZED;
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001616 spin_unlock_bh(&moxa_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001617}
1618
Linus Torvalds1da177e2005-04-16 15:20:36 -07001619/*****************************************************************************
1620 * Driver level functions: *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001621 *****************************************************************************/
Linus Torvalds1da177e2005-04-16 15:20:36 -07001622
Jiri Slabyb4173f42008-04-30 00:53:40 -07001623static void MoxaPortFlushData(struct moxa_port *port, int mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001624{
1625 void __iomem *ofsAddr;
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001626 if (mode < 0 || mode > 2)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001627 return;
Jiri Slabyb4173f42008-04-30 00:53:40 -07001628 ofsAddr = port->tableAddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001629 moxafunc(ofsAddr, FC_FlushQueue, mode);
1630 if (mode != 1) {
Jiri Slabyb4173f42008-04-30 00:53:40 -07001631 port->lowChkFlag = 0;
Jiri Slaby6f56b652007-10-18 03:06:24 -07001632 moxa_low_water_check(ofsAddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001633 }
1634}
1635
Linus Torvalds1da177e2005-04-16 15:20:36 -07001636/*
1637 * Moxa Port Number Description:
1638 *
1639 * MOXA serial driver supports up to 4 MOXA-C218/C320 boards. And,
1640 * the port number using in MOXA driver functions will be 0 to 31 for
1641 * first MOXA board, 32 to 63 for second, 64 to 95 for third and 96
1642 * to 127 for fourth. For example, if you setup three MOXA boards,
1643 * first board is C218, second board is C320-16 and third board is
1644 * C320-32. The port number of first board (C218 - 8 ports) is from
1645 * 0 to 7. The port number of second board (C320 - 16 ports) is form
1646 * 32 to 47. The port number of third board (C320 - 32 ports) is from
1647 * 64 to 95. And those port numbers form 8 to 31, 48 to 63 and 96 to
1648 * 127 will be invalid.
1649 *
1650 *
1651 * Moxa Functions Description:
1652 *
1653 * Function 1: Driver initialization routine, this routine must be
1654 * called when initialized driver.
1655 * Syntax:
1656 * void MoxaDriverInit();
1657 *
1658 *
1659 * Function 2: Moxa driver private IOCTL command processing.
1660 * Syntax:
1661 * int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port);
1662 *
1663 * unsigned int cmd : IOCTL command
1664 * unsigned long arg : IOCTL argument
1665 * int port : port number (0 - 127)
1666 *
1667 * return: 0 (OK)
1668 * -EINVAL
1669 * -ENOIOCTLCMD
1670 *
1671 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001672 * Function 6: Enable this port to start Tx/Rx data.
1673 * Syntax:
1674 * void MoxaPortEnable(int port);
1675 * int port : port number (0 - 127)
1676 *
1677 *
1678 * Function 7: Disable this port
1679 * Syntax:
1680 * void MoxaPortDisable(int port);
1681 * int port : port number (0 - 127)
1682 *
1683 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001684 * Function 10: Setting baud rate of this port.
1685 * Syntax:
Jiri Slaby08d01c72008-04-30 00:53:47 -07001686 * speed_t MoxaPortSetBaud(int port, speed_t baud);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001687 * int port : port number (0 - 127)
1688 * long baud : baud rate (50 - 115200)
1689 *
1690 * return: 0 : this port is invalid or baud < 50
1691 * 50 - 115200 : the real baud rate set to the port, if
1692 * the argument baud is large than maximun
1693 * available baud rate, the real setting
1694 * baud rate will be the maximun baud rate.
1695 *
1696 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001697 * Function 12: Configure the port.
1698 * Syntax:
Alan Cox606d0992006-12-08 02:38:45 -08001699 * int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001700 * int port : port number (0 - 127)
Alan Cox606d0992006-12-08 02:38:45 -08001701 * struct ktermios * termio : termio structure pointer
Alan Coxc7bce302006-09-30 23:27:24 -07001702 * speed_t baud : baud rate
Linus Torvalds1da177e2005-04-16 15:20:36 -07001703 *
1704 * return: -1 : this port is invalid or termio == NULL
1705 * 0 : setting O.K.
1706 *
1707 *
1708 * Function 13: Get the DTR/RTS state of this port.
1709 * Syntax:
1710 * int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState);
1711 * int port : port number (0 - 127)
1712 * int * dtrState : pointer to INT to receive the current DTR
1713 * state. (if NULL, this function will not
1714 * write to this address)
1715 * int * rtsState : pointer to INT to receive the current RTS
1716 * state. (if NULL, this function will not
1717 * write to this address)
1718 *
1719 * return: -1 : this port is invalid
1720 * 0 : O.K.
1721 *
1722 *
1723 * Function 14: Setting the DTR/RTS output state of this port.
1724 * Syntax:
1725 * void MoxaPortLineCtrl(int port, int dtrState, int rtsState);
1726 * int port : port number (0 - 127)
1727 * int dtrState : DTR output state (0: off, 1: on)
1728 * int rtsState : RTS output state (0: off, 1: on)
1729 *
1730 *
1731 * Function 15: Setting the flow control of this port.
1732 * Syntax:
1733 * void MoxaPortFlowCtrl(int port, int rtsFlow, int ctsFlow, int rxFlow,
1734 * int txFlow,int xany);
1735 * int port : port number (0 - 127)
1736 * int rtsFlow : H/W RTS flow control (0: no, 1: yes)
1737 * int ctsFlow : H/W CTS flow control (0: no, 1: yes)
1738 * int rxFlow : S/W Rx XON/XOFF flow control (0: no, 1: yes)
1739 * int txFlow : S/W Tx XON/XOFF flow control (0: no, 1: yes)
1740 * int xany : S/W XANY flow control (0: no, 1: yes)
1741 *
1742 *
1743 * Function 16: Get ths line status of this port
1744 * Syntax:
1745 * int MoxaPortLineStatus(int port);
1746 * int port : port number (0 - 127)
1747 *
1748 * return: Bit 0 - CTS state (0: off, 1: on)
1749 * Bit 1 - DSR state (0: off, 1: on)
1750 * Bit 2 - DCD state (0: off, 1: on)
1751 *
1752 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001753 * Function 19: Flush the Rx/Tx buffer data of this port.
1754 * Syntax:
1755 * void MoxaPortFlushData(int port, int mode);
1756 * int port : port number (0 - 127)
1757 * int mode
1758 * 0 : flush the Rx buffer
1759 * 1 : flush the Tx buffer
1760 * 2 : flush the Rx and Tx buffer
1761 *
1762 *
1763 * Function 20: Write data.
1764 * Syntax:
1765 * int MoxaPortWriteData(int port, unsigned char * buffer, int length);
1766 * int port : port number (0 - 127)
1767 * unsigned char * buffer : pointer to write data buffer.
1768 * int length : write data length
1769 *
1770 * return: 0 - length : real write data length
1771 *
1772 *
1773 * Function 21: Read data.
1774 * Syntax:
Alan Cox33f0f882006-01-09 20:54:13 -08001775 * int MoxaPortReadData(int port, struct tty_struct *tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001776 * int port : port number (0 - 127)
Alan Cox33f0f882006-01-09 20:54:13 -08001777 * struct tty_struct *tty : tty for data
Linus Torvalds1da177e2005-04-16 15:20:36 -07001778 *
1779 * return: 0 - length : real read data length
1780 *
1781 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001782 * Function 24: Get the Tx buffer current queued data bytes
1783 * Syntax:
1784 * int MoxaPortTxQueue(int port);
1785 * int port : port number (0 - 127)
1786 *
1787 * return: .. : Tx buffer current queued data bytes
1788 *
1789 *
1790 * Function 25: Get the Tx buffer current free space
1791 * Syntax:
1792 * int MoxaPortTxFree(int port);
1793 * int port : port number (0 - 127)
1794 *
1795 * return: .. : Tx buffer current free space
1796 *
1797 *
1798 * Function 26: Get the Rx buffer current queued data bytes
1799 * Syntax:
1800 * int MoxaPortRxQueue(int port);
1801 * int port : port number (0 - 127)
1802 *
1803 * return: .. : Rx buffer current queued data bytes
1804 *
1805 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001806 * Function 28: Disable port data transmission.
1807 * Syntax:
1808 * void MoxaPortTxDisable(int port);
1809 * int port : port number (0 - 127)
1810 *
1811 *
1812 * Function 29: Enable port data transmission.
1813 * Syntax:
1814 * void MoxaPortTxEnable(int port);
1815 * int port : port number (0 - 127)
1816 *
1817 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001818 * Function 31: Get the received BREAK signal count and reset it.
1819 * Syntax:
1820 * int MoxaPortResetBrkCnt(int port);
1821 * int port : port number (0 - 127)
1822 *
1823 * return: 0 - .. : BREAK signal count
1824 *
1825 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001826 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001827
Jiri Slabyb4173f42008-04-30 00:53:40 -07001828static void MoxaPortEnable(struct moxa_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001829{
1830 void __iomem *ofsAddr;
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001831 u16 lowwater = 512;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001832
Jiri Slabyb4173f42008-04-30 00:53:40 -07001833 ofsAddr = port->tableAddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001834 writew(lowwater, ofsAddr + Low_water);
Jiri Slaby08d01c72008-04-30 00:53:47 -07001835 if (MOXA_IS_320(port->board))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001836 moxafunc(ofsAddr, FC_SetBreakIrq, 0);
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001837 else
1838 writew(readw(ofsAddr + HostStat) | WakeupBreak,
1839 ofsAddr + HostStat);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001840
1841 moxafunc(ofsAddr, FC_SetLineIrq, Magic_code);
1842 moxafunc(ofsAddr, FC_FlushQueue, 2);
1843
1844 moxafunc(ofsAddr, FC_EnableCH, Magic_code);
1845 MoxaPortLineStatus(port);
1846}
1847
Jiri Slabyb4173f42008-04-30 00:53:40 -07001848static void MoxaPortDisable(struct moxa_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001849{
Jiri Slabyb4173f42008-04-30 00:53:40 -07001850 void __iomem *ofsAddr = port->tableAddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001851
1852 moxafunc(ofsAddr, FC_SetFlowCtl, 0); /* disable flow control */
1853 moxafunc(ofsAddr, FC_ClrLineIrq, Magic_code);
1854 writew(0, ofsAddr + HostStat);
1855 moxafunc(ofsAddr, FC_DisableCH, Magic_code);
1856}
1857
Jiri Slaby08d01c72008-04-30 00:53:47 -07001858static speed_t MoxaPortSetBaud(struct moxa_port *port, speed_t baud)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001859{
Jiri Slaby08d01c72008-04-30 00:53:47 -07001860 void __iomem *ofsAddr = port->tableAddr;
1861 unsigned int clock, val;
1862 speed_t max;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001863
Jiri Slaby08d01c72008-04-30 00:53:47 -07001864 max = MOXA_IS_320(port->board) ? 460800 : 921600;
1865 if (baud < 50)
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001866 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001867 if (baud > max)
1868 baud = max;
Jiri Slaby08d01c72008-04-30 00:53:47 -07001869 clock = 921600;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001870 val = clock / baud;
1871 moxafunc(ofsAddr, FC_SetBaud, val);
1872 baud = clock / val;
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001873 return baud;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001874}
1875
Jiri Slabyb4173f42008-04-30 00:53:40 -07001876static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio,
1877 speed_t baud)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001878{
1879 void __iomem *ofsAddr;
1880 tcflag_t cflag;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001881 tcflag_t mode = 0;
1882
Jiri Slabyb4173f42008-04-30 00:53:40 -07001883 ofsAddr = port->tableAddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001884 cflag = termio->c_cflag; /* termio->c_cflag */
1885
1886 mode = termio->c_cflag & CSIZE;
1887 if (mode == CS5)
1888 mode = MX_CS5;
1889 else if (mode == CS6)
1890 mode = MX_CS6;
1891 else if (mode == CS7)
1892 mode = MX_CS7;
1893 else if (mode == CS8)
1894 mode = MX_CS8;
1895
1896 if (termio->c_cflag & CSTOPB) {
1897 if (mode == MX_CS5)
1898 mode |= MX_STOP15;
1899 else
1900 mode |= MX_STOP2;
1901 } else
1902 mode |= MX_STOP1;
1903
1904 if (termio->c_cflag & PARENB) {
1905 if (termio->c_cflag & PARODD)
1906 mode |= MX_PARODD;
1907 else
1908 mode |= MX_PAREVEN;
1909 } else
1910 mode |= MX_PARNONE;
1911
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001912 moxafunc(ofsAddr, FC_SetDataMode, (u16)mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001913
Jiri Slaby08d01c72008-04-30 00:53:47 -07001914 if (MOXA_IS_320(port->board) && baud >= 921600)
1915 return -1;
1916
Alan Coxdb1acaa2008-02-08 04:18:43 -08001917 baud = MoxaPortSetBaud(port, baud);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001918
1919 if (termio->c_iflag & (IXON | IXOFF | IXANY)) {
1920 writeb(termio->c_cc[VSTART], ofsAddr + FuncArg);
1921 writeb(termio->c_cc[VSTOP], ofsAddr + FuncArg1);
1922 writeb(FC_SetXonXoff, ofsAddr + FuncCode);
Jiri Slaby6f56b652007-10-18 03:06:24 -07001923 moxa_wait_finish(ofsAddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001924
1925 }
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001926 return baud;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001927}
1928
Jiri Slabyb4173f42008-04-30 00:53:40 -07001929static int MoxaPortGetLineOut(struct moxa_port *port, int *dtrState,
1930 int *rtsState)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001931{
Jiri Slabyb4173f42008-04-30 00:53:40 -07001932 if (dtrState)
1933 *dtrState = !!(port->lineCtrl & DTR_ON);
1934 if (rtsState)
1935 *rtsState = !!(port->lineCtrl & RTS_ON);
1936
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001937 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001938}
1939
Jiri Slabyb4173f42008-04-30 00:53:40 -07001940static void MoxaPortLineCtrl(struct moxa_port *port, int dtr, int rts)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001941{
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001942 u8 mode = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001943
Linus Torvalds1da177e2005-04-16 15:20:36 -07001944 if (dtr)
1945 mode |= DTR_ON;
1946 if (rts)
1947 mode |= RTS_ON;
Jiri Slabyb4173f42008-04-30 00:53:40 -07001948 port->lineCtrl = mode;
1949 moxafunc(port->tableAddr, FC_LineControl, mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001950}
1951
Jiri Slabyb4173f42008-04-30 00:53:40 -07001952static void MoxaPortFlowCtrl(struct moxa_port *port, int rts, int cts,
1953 int txflow, int rxflow, int txany)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001954{
Jiri Slabyb4173f42008-04-30 00:53:40 -07001955 int mode = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001956
Linus Torvalds1da177e2005-04-16 15:20:36 -07001957 if (rts)
1958 mode |= RTS_FlowCtl;
1959 if (cts)
1960 mode |= CTS_FlowCtl;
1961 if (txflow)
1962 mode |= Tx_FlowCtl;
1963 if (rxflow)
1964 mode |= Rx_FlowCtl;
1965 if (txany)
1966 mode |= IXM_IXANY;
Jiri Slabyb4173f42008-04-30 00:53:40 -07001967 moxafunc(port->tableAddr, FC_SetFlowCtl, mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001968}
1969
Jiri Slabyb4173f42008-04-30 00:53:40 -07001970static int MoxaPortLineStatus(struct moxa_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001971{
1972 void __iomem *ofsAddr;
1973 int val;
1974
Jiri Slabyb4173f42008-04-30 00:53:40 -07001975 ofsAddr = port->tableAddr;
Jiri Slaby08d01c72008-04-30 00:53:47 -07001976 if (MOXA_IS_320(port->board)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001977 moxafunc(ofsAddr, FC_LineStatus, 0);
1978 val = readw(ofsAddr + FuncArg);
1979 } else {
1980 val = readw(ofsAddr + FlagStat) >> 4;
1981 }
1982 val &= 0x0B;
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001983 if (val & 8)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001984 val |= 4;
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001985 spin_lock_bh(&moxa_lock);
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001986 moxa_new_dcdstate(port, val & 8);
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001987 spin_unlock_bh(&moxa_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001988 val &= 7;
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001989 return val;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001990}
1991
Alan Coxd450b5a2008-10-13 10:39:58 +01001992static int MoxaPortWriteData(struct tty_struct *tty,
Jiri Slaby2108eba2008-04-30 00:53:44 -07001993 const unsigned char *buffer, int len)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001994{
Alan Coxd450b5a2008-10-13 10:39:58 +01001995 struct moxa_port *port = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001996 void __iomem *baseAddr, *ofsAddr, *ofs;
Jiri Slaby2108eba2008-04-30 00:53:44 -07001997 unsigned int c, total;
1998 u16 head, tail, tx_mask, spage, epage;
1999 u16 pageno, pageofs, bufhead;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002000
Jiri Slabyb4173f42008-04-30 00:53:40 -07002001 ofsAddr = port->tableAddr;
2002 baseAddr = port->board->basemem;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002003 tx_mask = readw(ofsAddr + TX_mask);
2004 spage = readw(ofsAddr + Page_txb);
2005 epage = readw(ofsAddr + EndPage_txb);
2006 tail = readw(ofsAddr + TXwptr);
2007 head = readw(ofsAddr + TXrptr);
Jiri Slaby2108eba2008-04-30 00:53:44 -07002008 c = (head > tail) ? (head - tail - 1) : (head - tail + tx_mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002009 if (c > len)
2010 c = len;
Alan Cox9de6a512008-07-16 21:56:02 +01002011 moxaLog.txcnt[port->port.tty->index] += c;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002012 total = c;
2013 if (spage == epage) {
2014 bufhead = readw(ofsAddr + Ofs_txb);
2015 writew(spage, baseAddr + Control_reg);
2016 while (c > 0) {
2017 if (head > tail)
2018 len = head - tail - 1;
2019 else
2020 len = tx_mask + 1 - tail;
2021 len = (c > len) ? len : c;
2022 ofs = baseAddr + DynPage_addr + bufhead + tail;
Jiri Slaby2108eba2008-04-30 00:53:44 -07002023 memcpy_toio(ofs, buffer, len);
2024 buffer += len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002025 tail = (tail + len) & tx_mask;
2026 c -= len;
2027 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002028 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002029 pageno = spage + (tail >> 13);
2030 pageofs = tail & Page_mask;
Jiri Slaby2108eba2008-04-30 00:53:44 -07002031 while (c > 0) {
2032 len = Page_size - pageofs;
2033 if (len > c)
2034 len = c;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002035 writeb(pageno, baseAddr + Control_reg);
2036 ofs = baseAddr + DynPage_addr + pageofs;
Jiri Slaby2108eba2008-04-30 00:53:44 -07002037 memcpy_toio(ofs, buffer, len);
2038 buffer += len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002039 if (++pageno == epage)
2040 pageno = spage;
2041 pageofs = 0;
Jiri Slaby2108eba2008-04-30 00:53:44 -07002042 c -= len;
2043 }
2044 tail = (tail + total) & tx_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002045 }
Jiri Slaby2108eba2008-04-30 00:53:44 -07002046 writew(tail, ofsAddr + TXwptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002047 writeb(1, ofsAddr + CD180TXirq); /* start to send */
Jiri Slaby2108eba2008-04-30 00:53:44 -07002048 return total;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002049}
2050
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07002051static int MoxaPortReadData(struct moxa_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002052{
Alan Cox9de6a512008-07-16 21:56:02 +01002053 struct tty_struct *tty = port->port.tty;
Jiri Slaby2108eba2008-04-30 00:53:44 -07002054 unsigned char *dst;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002055 void __iomem *baseAddr, *ofsAddr, *ofs;
Jiri Slaby2108eba2008-04-30 00:53:44 -07002056 unsigned int count, len, total;
2057 u16 tail, rx_mask, spage, epage;
2058 u16 pageno, pageofs, bufhead, head;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002059
Jiri Slabyb4173f42008-04-30 00:53:40 -07002060 ofsAddr = port->tableAddr;
2061 baseAddr = port->board->basemem;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002062 head = readw(ofsAddr + RXrptr);
2063 tail = readw(ofsAddr + RXwptr);
2064 rx_mask = readw(ofsAddr + RX_mask);
2065 spage = readw(ofsAddr + Page_rxb);
2066 epage = readw(ofsAddr + EndPage_rxb);
Jiri Slaby2108eba2008-04-30 00:53:44 -07002067 count = (tail >= head) ? (tail - head) : (tail - head + rx_mask + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002068 if (count == 0)
Alan Cox33f0f882006-01-09 20:54:13 -08002069 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002070
Alan Cox33f0f882006-01-09 20:54:13 -08002071 total = count;
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07002072 moxaLog.rxcnt[tty->index] += total;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002073 if (spage == epage) {
2074 bufhead = readw(ofsAddr + Ofs_rxb);
2075 writew(spage, baseAddr + Control_reg);
2076 while (count > 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002077 ofs = baseAddr + DynPage_addr + bufhead + head;
Jiri Slaby2108eba2008-04-30 00:53:44 -07002078 len = (tail >= head) ? (tail - head) :
2079 (rx_mask + 1 - head);
2080 len = tty_prepare_flip_string(tty, &dst,
2081 min(len, count));
2082 memcpy_fromio(dst, ofs, len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002083 head = (head + len) & rx_mask;
2084 count -= len;
2085 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002086 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002087 pageno = spage + (head >> 13);
2088 pageofs = head & Page_mask;
Jiri Slaby2108eba2008-04-30 00:53:44 -07002089 while (count > 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002090 writew(pageno, baseAddr + Control_reg);
2091 ofs = baseAddr + DynPage_addr + pageofs;
Jiri Slaby2108eba2008-04-30 00:53:44 -07002092 len = tty_prepare_flip_string(tty, &dst,
2093 min(Page_size - pageofs, count));
2094 memcpy_fromio(dst, ofs, len);
2095
2096 count -= len;
2097 pageofs = (pageofs + len) & Page_mask;
2098 if (pageofs == 0 && ++pageno == epage)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002099 pageno = spage;
Jiri Slaby2108eba2008-04-30 00:53:44 -07002100 }
2101 head = (head + total) & rx_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002102 }
Jiri Slaby2108eba2008-04-30 00:53:44 -07002103 writew(head, ofsAddr + RXrptr);
2104 if (readb(ofsAddr + FlagStat) & Xoff_state) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002105 moxaLowWaterChk = 1;
Jiri Slabyb4173f42008-04-30 00:53:40 -07002106 port->lowChkFlag = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002107 }
Jiri Slaby2108eba2008-04-30 00:53:44 -07002108 return total;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002109}
2110
2111
Jiri Slabyb4173f42008-04-30 00:53:40 -07002112static int MoxaPortTxQueue(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 + TXrptr);
2118 wptr = readw(ofsAddr + TXwptr);
2119 mask = readw(ofsAddr + TX_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 int MoxaPortTxFree(struct moxa_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002124{
Jiri Slabyb4173f42008-04-30 00:53:40 -07002125 void __iomem *ofsAddr = port->tableAddr;
Jiri Slaby2108eba2008-04-30 00:53:44 -07002126 u16 rptr, wptr, mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002127
Linus Torvalds1da177e2005-04-16 15:20:36 -07002128 rptr = readw(ofsAddr + TXrptr);
2129 wptr = readw(ofsAddr + TXwptr);
2130 mask = readw(ofsAddr + TX_mask);
Jiri Slaby2108eba2008-04-30 00:53:44 -07002131 return mask - ((wptr - rptr) & mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002132}
2133
Jiri Slabyb4173f42008-04-30 00:53:40 -07002134static int MoxaPortRxQueue(struct moxa_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002135{
Jiri Slabyb4173f42008-04-30 00:53:40 -07002136 void __iomem *ofsAddr = port->tableAddr;
Jiri Slaby2108eba2008-04-30 00:53:44 -07002137 u16 rptr, wptr, mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002138
Linus Torvalds1da177e2005-04-16 15:20:36 -07002139 rptr = readw(ofsAddr + RXrptr);
2140 wptr = readw(ofsAddr + RXwptr);
2141 mask = readw(ofsAddr + RX_mask);
Jiri Slaby2108eba2008-04-30 00:53:44 -07002142 return (wptr - rptr) & mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002143}
2144
Jiri Slabyb4173f42008-04-30 00:53:40 -07002145static void MoxaPortTxDisable(struct moxa_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002146{
Jiri Slabyb4173f42008-04-30 00:53:40 -07002147 moxafunc(port->tableAddr, FC_SetXoffState, Magic_code);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002148}
2149
Jiri Slabyb4173f42008-04-30 00:53:40 -07002150static void MoxaPortTxEnable(struct moxa_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002151{
Jiri Slabyb4173f42008-04-30 00:53:40 -07002152 moxafunc(port->tableAddr, FC_SetXonState, Magic_code);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002153}
2154
Jiri Slaby8f8ecba2007-02-10 01:45:33 -08002155static int moxa_get_serial_info(struct moxa_port *info,
Jiri Slabyeaa95a82008-04-30 00:53:46 -07002156 struct serial_struct __user *retinfo)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002157{
Jiri Slabyeaa95a82008-04-30 00:53:46 -07002158 struct serial_struct tmp = {
2159 .type = info->type,
Alan Cox9de6a512008-07-16 21:56:02 +01002160 .line = info->port.tty->index,
2161 .flags = info->port.flags,
Jiri Slabyeaa95a82008-04-30 00:53:46 -07002162 .baud_base = 921600,
Alan Cox44b7d1b2008-07-16 21:57:18 +01002163 .close_delay = info->port.close_delay
Jiri Slabyeaa95a82008-04-30 00:53:46 -07002164 };
2165 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002166}
2167
2168
Jiri Slaby8f8ecba2007-02-10 01:45:33 -08002169static int moxa_set_serial_info(struct moxa_port *info,
Jiri Slabyeaa95a82008-04-30 00:53:46 -07002170 struct serial_struct __user *new_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002171{
2172 struct serial_struct new_serial;
2173
Jiri Slabyeaa95a82008-04-30 00:53:46 -07002174 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002175 return -EFAULT;
2176
Jiri Slabyeaa95a82008-04-30 00:53:46 -07002177 if (new_serial.irq != 0 || new_serial.port != 0 ||
2178 new_serial.custom_divisor != 0 ||
2179 new_serial.baud_base != 921600)
2180 return -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002181
2182 if (!capable(CAP_SYS_ADMIN)) {
2183 if (((new_serial.flags & ~ASYNC_USR_MASK) !=
Alan Cox9de6a512008-07-16 21:56:02 +01002184 (info->port.flags & ~ASYNC_USR_MASK)))
Jiri Slabyeaa95a82008-04-30 00:53:46 -07002185 return -EPERM;
2186 } else
Alan Cox44b7d1b2008-07-16 21:57:18 +01002187 info->port.close_delay = new_serial.close_delay * HZ / 100;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002188
2189 new_serial.flags = (new_serial.flags & ~ASYNC_FLAGS);
Alan Cox9de6a512008-07-16 21:56:02 +01002190 new_serial.flags |= (info->port.flags & ASYNC_FLAGS);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002191
Jiri Slabyeaa95a82008-04-30 00:53:46 -07002192 MoxaSetFifo(info, new_serial.type == PORT_16550A);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002193
2194 info->type = new_serial.type;
Jiri Slabyeaa95a82008-04-30 00:53:46 -07002195 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002196}
2197
2198
2199
2200/*****************************************************************************
2201 * Static local functions: *
2202 *****************************************************************************/
Linus Torvalds1da177e2005-04-16 15:20:36 -07002203
Jiri Slabyb4173f42008-04-30 00:53:40 -07002204static void MoxaSetFifo(struct moxa_port *port, int enable)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002205{
Jiri Slabyb4173f42008-04-30 00:53:40 -07002206 void __iomem *ofsAddr = port->tableAddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002207
2208 if (!enable) {
2209 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 0);
2210 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 1);
2211 } else {
2212 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 3);
2213 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 16);
2214 }
2215}