blob: 98d2bd16706d5a483774cd405d22220b757538ed [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * mxser.c -- MOXA Smartio/Industio family multiport serial driver.
3 *
Jiri Slaby80ff8a82008-02-07 00:16:51 -08004 * Copyright (C) 1999-2006 Moxa Technologies (support@moxa.com).
5 * Copyright (C) 2006-2008 Jiri Slaby <jirislaby@gmail.com>
Linus Torvalds1da177e2005-04-16 15:20:36 -07006 *
Jiri Slaby1c456072008-02-07 00:16:46 -08007 * This code is loosely based on the 1.8 moxa driver which is based on
8 * Linux serial driver, written by Linus Torvalds, Theodore T'so and
9 * others.
Linus Torvalds1da177e2005-04-16 15:20:36 -070010 *
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
Jesper Juhl8ea2c2e2006-06-25 05:47:54 -070014 * (at your option) any later version.
Linus Torvalds1da177e2005-04-16 15:20:36 -070015 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070016 * Fed through a cleanup, indent and remove of non 2.6 code by Alan Cox
Alan Cox8eb04cf2008-11-11 14:48:44 +000017 * <alan@lxorguk.ukuu.org.uk>. The original 1.8 code is available on
18 * www.moxa.com.
Linus Torvalds1da177e2005-04-16 15:20:36 -070019 * - Fixed x86_64 cleanness
Linus Torvalds1da177e2005-04-16 15:20:36 -070020 */
21
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include <linux/module.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070023#include <linux/errno.h>
24#include <linux/signal.h>
25#include <linux/sched.h>
26#include <linux/timer.h>
27#include <linux/interrupt.h>
28#include <linux/tty.h>
29#include <linux/tty_flip.h>
30#include <linux/serial.h>
31#include <linux/serial_reg.h>
32#include <linux/major.h>
33#include <linux/string.h>
34#include <linux/fcntl.h>
35#include <linux/ptrace.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070036#include <linux/ioport.h>
37#include <linux/mm.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070038#include <linux/delay.h>
39#include <linux/pci.h>
Jiri Slaby1977f032007-10-18 23:40:25 -070040#include <linux/bitops.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090041#include <linux/slab.h>
Manuel Zerpies5a3c6b22011-06-16 14:07:22 +020042#include <linux/ratelimit.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070043
Linus Torvalds1da177e2005-04-16 15:20:36 -070044#include <asm/io.h>
45#include <asm/irq.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070046#include <asm/uaccess.h>
47
48#include "mxser.h"
49
Jiri Slaby502f2952009-09-10 12:20:07 +020050#define MXSER_VERSION "2.0.5" /* 1.14 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070051#define MXSERMAJOR 174
Linus Torvalds1da177e2005-04-16 15:20:36 -070052
Linus Torvalds1da177e2005-04-16 15:20:36 -070053#define MXSER_BOARDS 4 /* Max. boards */
Linus Torvalds1da177e2005-04-16 15:20:36 -070054#define MXSER_PORTS_PER_BOARD 8 /* Max. ports per board */
Jiri Slaby1c456072008-02-07 00:16:46 -080055#define MXSER_PORTS (MXSER_BOARDS * MXSER_PORTS_PER_BOARD)
56#define MXSER_ISR_PASS_LIMIT 100
Linus Torvalds1da177e2005-04-16 15:20:36 -070057
Jiri Slaby1c456072008-02-07 00:16:46 -080058/*CheckIsMoxaMust return value*/
59#define MOXA_OTHER_UART 0x00
60#define MOXA_MUST_MU150_HWID 0x01
61#define MOXA_MUST_MU860_HWID 0x02
62
Linus Torvalds1da177e2005-04-16 15:20:36 -070063#define WAKEUP_CHARS 256
64
65#define UART_MCR_AFE 0x20
66#define UART_LSR_SPECIAL 0x1E
67
Jiri Slabye129def2008-07-22 11:20:34 +010068#define PCI_DEVICE_ID_POS104UL 0x1044
Jiri Slaby1c456072008-02-07 00:16:46 -080069#define PCI_DEVICE_ID_CB108 0x1080
Jiri Slabye129def2008-07-22 11:20:34 +010070#define PCI_DEVICE_ID_CP102UF 0x1023
Jiri Slaby502f2952009-09-10 12:20:07 +020071#define PCI_DEVICE_ID_CP112UL 0x1120
Jiri Slaby1c456072008-02-07 00:16:46 -080072#define PCI_DEVICE_ID_CB114 0x1142
Jiri Slaby80ff8a82008-02-07 00:16:51 -080073#define PCI_DEVICE_ID_CP114UL 0x1143
Jiri Slaby1c456072008-02-07 00:16:46 -080074#define PCI_DEVICE_ID_CB134I 0x1341
75#define PCI_DEVICE_ID_CP138U 0x1380
Linus Torvalds1da177e2005-04-16 15:20:36 -070076
Linus Torvalds1da177e2005-04-16 15:20:36 -070077
78#define C168_ASIC_ID 1
79#define C104_ASIC_ID 2
80#define C102_ASIC_ID 0xB
81#define CI132_ASIC_ID 4
82#define CI134_ASIC_ID 3
83#define CI104J_ASIC_ID 5
84
Jiri Slaby1c456072008-02-07 00:16:46 -080085#define MXSER_HIGHBAUD 1
86#define MXSER_HAS2 2
Linus Torvalds1da177e2005-04-16 15:20:36 -070087
Jesper Juhl8ea2c2e2006-06-25 05:47:54 -070088/* This is only for PCI */
Jiri Slaby1c456072008-02-07 00:16:46 -080089static const struct {
Linus Torvalds1da177e2005-04-16 15:20:36 -070090 int type;
91 int tx_fifo;
92 int rx_fifo;
93 int xmit_fifo_size;
94 int rx_high_water;
95 int rx_trigger;
96 int rx_low_water;
97 long max_baud;
Jiri Slaby1c456072008-02-07 00:16:46 -080098} Gpci_uart_info[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070099 {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L},
100 {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L},
101 {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L}
102};
Jiri Slaby1c456072008-02-07 00:16:46 -0800103#define UART_INFO_NUM ARRAY_SIZE(Gpci_uart_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104
Jiri Slaby1c456072008-02-07 00:16:46 -0800105struct mxser_cardinfo {
106 char *name;
107 unsigned int nports;
108 unsigned int flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109};
110
Jiri Slaby1c456072008-02-07 00:16:46 -0800111static const struct mxser_cardinfo mxser_cards[] = {
112/* 0*/ { "C168 series", 8, },
113 { "C104 series", 4, },
114 { "CI-104J series", 4, },
115 { "C168H/PCI series", 8, },
116 { "C104H/PCI series", 4, },
117/* 5*/ { "C102 series", 4, MXSER_HAS2 }, /* C102-ISA */
118 { "CI-132 series", 4, MXSER_HAS2 },
119 { "CI-134 series", 4, },
120 { "CP-132 series", 2, },
121 { "CP-114 series", 4, },
122/*10*/ { "CT-114 series", 4, },
123 { "CP-102 series", 2, MXSER_HIGHBAUD },
124 { "CP-104U series", 4, },
125 { "CP-168U series", 8, },
126 { "CP-132U series", 2, },
127/*15*/ { "CP-134U series", 4, },
128 { "CP-104JU series", 4, },
129 { "Moxa UC7000 Serial", 8, }, /* RC7000 */
130 { "CP-118U series", 8, },
131 { "CP-102UL series", 2, },
132/*20*/ { "CP-102U series", 2, },
133 { "CP-118EL series", 8, },
134 { "CP-168EL series", 8, },
135 { "CP-104EL series", 4, },
136 { "CB-108 series", 8, },
137/*25*/ { "CB-114 series", 4, },
138 { "CB-134I series", 4, },
139 { "CP-138U series", 8, },
Jiri Slaby80ff8a82008-02-07 00:16:51 -0800140 { "POS-104UL series", 4, },
Jiri Slabye129def2008-07-22 11:20:34 +0100141 { "CP-114UL series", 4, },
Jiri Slaby502f2952009-09-10 12:20:07 +0200142/*30*/ { "CP-102UF series", 2, },
143 { "CP-112UL series", 2, },
Jiri Slaby1c456072008-02-07 00:16:46 -0800144};
145
146/* driver_data correspond to the lines in the structure above
147 see also ISA probe function before you change something */
148static struct pci_device_id mxser_pcibrds[] = {
149 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C168), .driver_data = 3 },
150 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C104), .driver_data = 4 },
151 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132), .driver_data = 8 },
152 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP114), .driver_data = 9 },
153 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CT114), .driver_data = 10 },
154 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102), .driver_data = 11 },
155 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104U), .driver_data = 12 },
156 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168U), .driver_data = 13 },
157 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132U), .driver_data = 14 },
158 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP134U), .driver_data = 15 },
159 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104JU),.driver_data = 16 },
160 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_RC7000), .driver_data = 17 },
161 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118U), .driver_data = 18 },
162 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102UL),.driver_data = 19 },
163 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102U), .driver_data = 20 },
164 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118EL),.driver_data = 21 },
165 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168EL),.driver_data = 22 },
166 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104EL),.driver_data = 23 },
167 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB108), .driver_data = 24 },
168 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB114), .driver_data = 25 },
169 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB134I), .driver_data = 26 },
170 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP138U), .driver_data = 27 },
171 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_POS104UL), .driver_data = 28 },
Jiri Slaby80ff8a82008-02-07 00:16:51 -0800172 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP114UL), .driver_data = 29 },
Jiri Slabye129def2008-07-22 11:20:34 +0100173 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP102UF), .driver_data = 30 },
Jiri Slaby502f2952009-09-10 12:20:07 +0200174 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP112UL), .driver_data = 31 },
Jiri Slaby1c456072008-02-07 00:16:46 -0800175 { }
176};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
178
Jiri Slaby1df00922008-07-25 01:48:22 -0700179static unsigned long ioaddr[MXSER_BOARDS];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180static int ttymajor = MXSERMAJOR;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181
182/* Variables for insmod */
183
184MODULE_AUTHOR("Casper Yang");
185MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
Jiri Slaby1df00922008-07-25 01:48:22 -0700186module_param_array(ioaddr, ulong, NULL, 0);
187MODULE_PARM_DESC(ioaddr, "ISA io addresses to look for a moxa board");
Rusty Russell8d3b33f2006-03-25 03:07:05 -0800188module_param(ttymajor, int, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189MODULE_LICENSE("GPL");
190
191struct mxser_log {
192 int tick;
193 unsigned long rxcnt[MXSER_PORTS];
194 unsigned long txcnt[MXSER_PORTS];
195};
196
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197struct mxser_mon {
198 unsigned long rxcnt;
199 unsigned long txcnt;
200 unsigned long up_rxcnt;
201 unsigned long up_txcnt;
202 int modem_status;
203 unsigned char hold_reason;
204};
205
206struct mxser_mon_ext {
207 unsigned long rx_cnt[32];
208 unsigned long tx_cnt[32];
209 unsigned long up_rxcnt[32];
210 unsigned long up_txcnt[32];
211 int modem_status[32];
212
213 long baudrate[32];
214 int databits[32];
215 int stopbits[32];
216 int parity[32];
217 int flowctrl[32];
218 int fifo[32];
219 int iftype[32];
220};
Jesper Juhl8ea2c2e2006-06-25 05:47:54 -0700221
Jiri Slaby1c456072008-02-07 00:16:46 -0800222struct mxser_board;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223
Jiri Slaby1c456072008-02-07 00:16:46 -0800224struct mxser_port {
Alan Cox0ad9e7d2008-07-16 21:56:10 +0100225 struct tty_port port;
Jiri Slaby1c456072008-02-07 00:16:46 -0800226 struct mxser_board *board;
Jiri Slaby1c456072008-02-07 00:16:46 -0800227
228 unsigned long ioaddr;
229 unsigned long opmode_ioaddr;
230 int max_baud;
231
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 int rx_high_water;
233 int rx_trigger; /* Rx fifo trigger level */
234 int rx_low_water;
235 int baud_base; /* max. speed */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236 int type; /* UART type */
Jiri Slaby1c456072008-02-07 00:16:46 -0800237
238 int x_char; /* xon/xoff character */
239 int IER; /* Interrupt Enable Register */
240 int MCR; /* Modem control register */
241
242 unsigned char stop_rx;
243 unsigned char ldisc_stop_rx;
244
245 int custom_divisor;
Jiri Slaby1c456072008-02-07 00:16:46 -0800246 unsigned char err_shadow;
Jiri Slaby1c456072008-02-07 00:16:46 -0800247
Jiri Slaby1c456072008-02-07 00:16:46 -0800248 struct async_icount icount; /* kernel counters for 4 input interrupts */
249 int timeout;
250
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251 int read_status_mask;
252 int ignore_status_mask;
253 int xmit_fifo_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254 int xmit_head;
255 int xmit_tail;
256 int xmit_cnt;
Peter Hurleycd7b4b32016-01-10 14:51:38 -0800257 int closing;
Jiri Slaby1c456072008-02-07 00:16:46 -0800258
Alan Cox606d0992006-12-08 02:38:45 -0800259 struct ktermios normal_termios;
Jiri Slaby1c456072008-02-07 00:16:46 -0800260
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261 struct mxser_mon mon_data;
Jiri Slaby1c456072008-02-07 00:16:46 -0800262
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 spinlock_t slock;
Jiri Slaby1c456072008-02-07 00:16:46 -0800264};
265
266struct mxser_board {
267 unsigned int idx;
268 int irq;
269 const struct mxser_cardinfo *info;
270 unsigned long vector;
271 unsigned long vector_mask;
272
273 int chip_flag;
274 int uart_type;
275
276 struct mxser_port ports[MXSER_PORTS_PER_BOARD];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277};
278
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279struct mxser_mstatus {
280 tcflag_t cflag;
281 int cts;
282 int dsr;
283 int ri;
284 int dcd;
285};
286
Jiri Slaby1c456072008-02-07 00:16:46 -0800287static struct mxser_board mxser_boards[MXSER_BOARDS];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288static struct tty_driver *mxvar_sdriver;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289static struct mxser_log mxvar_log;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290static int mxser_set_baud_method[MXSER_PORTS + 1];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291
Christoph Hellwig148ff862008-04-30 00:54:29 -0700292static void mxser_enable_must_enchance_mode(unsigned long baseio)
293{
294 u8 oldlcr;
295 u8 efr;
296
297 oldlcr = inb(baseio + UART_LCR);
298 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
299
300 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
301 efr |= MOXA_MUST_EFR_EFRB_ENABLE;
302
303 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
304 outb(oldlcr, baseio + UART_LCR);
305}
306
Rakib Mullicke89d67c2010-10-27 15:34:26 -0700307#ifdef CONFIG_PCI
Christoph Hellwig148ff862008-04-30 00:54:29 -0700308static void mxser_disable_must_enchance_mode(unsigned long baseio)
309{
310 u8 oldlcr;
311 u8 efr;
312
313 oldlcr = inb(baseio + UART_LCR);
314 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
315
316 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
317 efr &= ~MOXA_MUST_EFR_EFRB_ENABLE;
318
319 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
320 outb(oldlcr, baseio + UART_LCR);
321}
Rakib Mullicke89d67c2010-10-27 15:34:26 -0700322#endif
Christoph Hellwig148ff862008-04-30 00:54:29 -0700323
324static void mxser_set_must_xon1_value(unsigned long baseio, u8 value)
325{
326 u8 oldlcr;
327 u8 efr;
328
329 oldlcr = inb(baseio + UART_LCR);
330 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
331
332 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
333 efr &= ~MOXA_MUST_EFR_BANK_MASK;
334 efr |= MOXA_MUST_EFR_BANK0;
335
336 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
337 outb(value, baseio + MOXA_MUST_XON1_REGISTER);
338 outb(oldlcr, baseio + UART_LCR);
339}
340
341static void mxser_set_must_xoff1_value(unsigned long baseio, u8 value)
342{
343 u8 oldlcr;
344 u8 efr;
345
346 oldlcr = inb(baseio + UART_LCR);
347 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
348
349 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
350 efr &= ~MOXA_MUST_EFR_BANK_MASK;
351 efr |= MOXA_MUST_EFR_BANK0;
352
353 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
354 outb(value, baseio + MOXA_MUST_XOFF1_REGISTER);
355 outb(oldlcr, baseio + UART_LCR);
356}
357
358static void mxser_set_must_fifo_value(struct mxser_port *info)
359{
360 u8 oldlcr;
361 u8 efr;
362
363 oldlcr = inb(info->ioaddr + UART_LCR);
364 outb(MOXA_MUST_ENTER_ENCHANCE, info->ioaddr + UART_LCR);
365
366 efr = inb(info->ioaddr + MOXA_MUST_EFR_REGISTER);
367 efr &= ~MOXA_MUST_EFR_BANK_MASK;
368 efr |= MOXA_MUST_EFR_BANK1;
369
370 outb(efr, info->ioaddr + MOXA_MUST_EFR_REGISTER);
371 outb((u8)info->rx_high_water, info->ioaddr + MOXA_MUST_RBRTH_REGISTER);
372 outb((u8)info->rx_trigger, info->ioaddr + MOXA_MUST_RBRTI_REGISTER);
373 outb((u8)info->rx_low_water, info->ioaddr + MOXA_MUST_RBRTL_REGISTER);
374 outb(oldlcr, info->ioaddr + UART_LCR);
375}
376
377static void mxser_set_must_enum_value(unsigned long baseio, u8 value)
378{
379 u8 oldlcr;
380 u8 efr;
381
382 oldlcr = inb(baseio + UART_LCR);
383 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
384
385 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
386 efr &= ~MOXA_MUST_EFR_BANK_MASK;
387 efr |= MOXA_MUST_EFR_BANK2;
388
389 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
390 outb(value, baseio + MOXA_MUST_ENUM_REGISTER);
391 outb(oldlcr, baseio + UART_LCR);
392}
393
Rakib Mullicke89d67c2010-10-27 15:34:26 -0700394#ifdef CONFIG_PCI
Christoph Hellwig148ff862008-04-30 00:54:29 -0700395static void mxser_get_must_hardware_id(unsigned long baseio, u8 *pId)
396{
397 u8 oldlcr;
398 u8 efr;
399
400 oldlcr = inb(baseio + UART_LCR);
401 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
402
403 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
404 efr &= ~MOXA_MUST_EFR_BANK_MASK;
405 efr |= MOXA_MUST_EFR_BANK2;
406
407 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
408 *pId = inb(baseio + MOXA_MUST_HWID_REGISTER);
409 outb(oldlcr, baseio + UART_LCR);
410}
Rakib Mullicke89d67c2010-10-27 15:34:26 -0700411#endif
Christoph Hellwig148ff862008-04-30 00:54:29 -0700412
413static void SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(unsigned long baseio)
414{
415 u8 oldlcr;
416 u8 efr;
417
418 oldlcr = inb(baseio + UART_LCR);
419 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
420
421 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
422 efr &= ~MOXA_MUST_EFR_SF_MASK;
423
424 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
425 outb(oldlcr, baseio + UART_LCR);
426}
427
428static void mxser_enable_must_tx_software_flow_control(unsigned long baseio)
429{
430 u8 oldlcr;
431 u8 efr;
432
433 oldlcr = inb(baseio + UART_LCR);
434 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
435
436 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
437 efr &= ~MOXA_MUST_EFR_SF_TX_MASK;
438 efr |= MOXA_MUST_EFR_SF_TX1;
439
440 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
441 outb(oldlcr, baseio + UART_LCR);
442}
443
444static void mxser_disable_must_tx_software_flow_control(unsigned long baseio)
445{
446 u8 oldlcr;
447 u8 efr;
448
449 oldlcr = inb(baseio + UART_LCR);
450 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
451
452 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
453 efr &= ~MOXA_MUST_EFR_SF_TX_MASK;
454
455 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
456 outb(oldlcr, baseio + UART_LCR);
457}
458
459static void mxser_enable_must_rx_software_flow_control(unsigned long baseio)
460{
461 u8 oldlcr;
462 u8 efr;
463
464 oldlcr = inb(baseio + UART_LCR);
465 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
466
467 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
468 efr &= ~MOXA_MUST_EFR_SF_RX_MASK;
469 efr |= MOXA_MUST_EFR_SF_RX1;
470
471 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
472 outb(oldlcr, baseio + UART_LCR);
473}
474
475static void mxser_disable_must_rx_software_flow_control(unsigned long baseio)
476{
477 u8 oldlcr;
478 u8 efr;
479
480 oldlcr = inb(baseio + UART_LCR);
481 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
482
483 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
484 efr &= ~MOXA_MUST_EFR_SF_RX_MASK;
485
486 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
487 outb(oldlcr, baseio + UART_LCR);
488}
489
Jesper Juhlb8cc5542007-10-18 03:06:03 -0700490#ifdef CONFIG_PCI
Bill Pemberton9671f092012-11-19 13:21:50 -0500491static int CheckIsMoxaMust(unsigned long io)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492{
493 u8 oldmcr, hwid;
494 int i;
495
496 outb(0, io + UART_LCR);
Christoph Hellwig148ff862008-04-30 00:54:29 -0700497 mxser_disable_must_enchance_mode(io);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498 oldmcr = inb(io + UART_MCR);
499 outb(0, io + UART_MCR);
Christoph Hellwig148ff862008-04-30 00:54:29 -0700500 mxser_set_must_xon1_value(io, 0x11);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501 if ((hwid = inb(io + UART_MCR)) != 0) {
502 outb(oldmcr, io + UART_MCR);
Jesper Juhl8ea2c2e2006-06-25 05:47:54 -0700503 return MOXA_OTHER_UART;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504 }
505
Christoph Hellwig148ff862008-04-30 00:54:29 -0700506 mxser_get_must_hardware_id(io, &hwid);
Jiri Slaby1c456072008-02-07 00:16:46 -0800507 for (i = 1; i < UART_INFO_NUM; i++) { /* 0 = OTHER_UART */
508 if (hwid == Gpci_uart_info[i].type)
Jesper Juhl8ea2c2e2006-06-25 05:47:54 -0700509 return (int)hwid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 }
511 return MOXA_OTHER_UART;
512}
Jesper Juhlb8cc5542007-10-18 03:06:03 -0700513#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514
Jiri Slaby1c456072008-02-07 00:16:46 -0800515static void process_txrx_fifo(struct mxser_port *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516{
517 int i;
518
519 if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
520 info->rx_trigger = 1;
521 info->rx_high_water = 1;
522 info->rx_low_water = 1;
523 info->xmit_fifo_size = 1;
Jiri Slaby1c456072008-02-07 00:16:46 -0800524 } else
525 for (i = 0; i < UART_INFO_NUM; i++)
526 if (info->board->chip_flag == Gpci_uart_info[i].type) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527 info->rx_trigger = Gpci_uart_info[i].rx_trigger;
528 info->rx_low_water = Gpci_uart_info[i].rx_low_water;
529 info->rx_high_water = Gpci_uart_info[i].rx_high_water;
530 info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
531 break;
532 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533}
534
Jiri Slaby1c456072008-02-07 00:16:46 -0800535static unsigned char mxser_get_msr(int baseaddr, int mode, int port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536{
Jiri Slaby72800df2008-07-25 01:48:20 -0700537 static unsigned char mxser_msr[MXSER_PORTS + 1];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538 unsigned char status = 0;
539
540 status = inb(baseaddr + UART_MSR);
541
542 mxser_msr[port] &= 0x0F;
543 mxser_msr[port] |= status;
544 status = mxser_msr[port];
545 if (mode)
546 mxser_msr[port] = 0;
547
548 return status;
549}
550
Alan Cox31f35932009-01-02 13:45:05 +0000551static int mxser_carrier_raised(struct tty_port *port)
552{
553 struct mxser_port *mp = container_of(port, struct mxser_port, port);
554 return (inb(mp->ioaddr + UART_MSR) & UART_MSR_DCD)?1:0;
555}
556
Alan Coxfcc8ac12009-06-11 12:24:17 +0100557static void mxser_dtr_rts(struct tty_port *port, int on)
Alan Cox5d951fb2009-01-02 13:45:19 +0000558{
559 struct mxser_port *mp = container_of(port, struct mxser_port, port);
560 unsigned long flags;
561
562 spin_lock_irqsave(&mp->slock, flags);
Alan Coxfcc8ac12009-06-11 12:24:17 +0100563 if (on)
564 outb(inb(mp->ioaddr + UART_MCR) |
565 UART_MCR_DTR | UART_MCR_RTS, mp->ioaddr + UART_MCR);
566 else
567 outb(inb(mp->ioaddr + UART_MCR)&~(UART_MCR_DTR | UART_MCR_RTS),
568 mp->ioaddr + UART_MCR);
Alan Cox5d951fb2009-01-02 13:45:19 +0000569 spin_unlock_irqrestore(&mp->slock, flags);
570}
571
Alan Cox216ba022008-10-13 10:40:19 +0100572static int mxser_set_baud(struct tty_struct *tty, long newspd)
Jiri Slaby1c456072008-02-07 00:16:46 -0800573{
Alan Cox216ba022008-10-13 10:40:19 +0100574 struct mxser_port *info = tty->driver_data;
Jiri Slaby1c456072008-02-07 00:16:46 -0800575 int quot = 0, baud;
576 unsigned char cval;
577
Alan Cox216ba022008-10-13 10:40:19 +0100578 if (!info->ioaddr)
Jiri Slaby1c456072008-02-07 00:16:46 -0800579 return -1;
580
581 if (newspd > info->max_baud)
582 return -1;
583
584 if (newspd == 134) {
585 quot = 2 * info->baud_base / 269;
Alan Cox216ba022008-10-13 10:40:19 +0100586 tty_encode_baud_rate(tty, 134, 134);
Jiri Slaby1c456072008-02-07 00:16:46 -0800587 } else if (newspd) {
588 quot = info->baud_base / newspd;
589 if (quot == 0)
590 quot = 1;
591 baud = info->baud_base/quot;
Alan Cox216ba022008-10-13 10:40:19 +0100592 tty_encode_baud_rate(tty, baud, baud);
Jiri Slaby1c456072008-02-07 00:16:46 -0800593 } else {
594 quot = 0;
595 }
596
597 info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
598 info->timeout += HZ / 50; /* Add .02 seconds of slop */
599
600 if (quot) {
601 info->MCR |= UART_MCR_DTR;
602 outb(info->MCR, info->ioaddr + UART_MCR);
603 } else {
604 info->MCR &= ~UART_MCR_DTR;
605 outb(info->MCR, info->ioaddr + UART_MCR);
606 return 0;
607 }
608
609 cval = inb(info->ioaddr + UART_LCR);
610
611 outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR); /* set DLAB */
612
613 outb(quot & 0xff, info->ioaddr + UART_DLL); /* LS of divisor */
614 outb(quot >> 8, info->ioaddr + UART_DLM); /* MS of divisor */
615 outb(cval, info->ioaddr + UART_LCR); /* reset DLAB */
616
617#ifdef BOTHER
Alan Cox216ba022008-10-13 10:40:19 +0100618 if (C_BAUD(tty) == BOTHER) {
Jiri Slaby1c456072008-02-07 00:16:46 -0800619 quot = info->baud_base % newspd;
620 quot *= 8;
621 if (quot % newspd > newspd / 2) {
622 quot /= newspd;
623 quot++;
624 } else
625 quot /= newspd;
626
Christoph Hellwig148ff862008-04-30 00:54:29 -0700627 mxser_set_must_enum_value(info->ioaddr, quot);
Jiri Slaby1c456072008-02-07 00:16:46 -0800628 } else
629#endif
Christoph Hellwig148ff862008-04-30 00:54:29 -0700630 mxser_set_must_enum_value(info->ioaddr, 0);
Jiri Slaby1c456072008-02-07 00:16:46 -0800631
632 return 0;
633}
634
635/*
636 * This routine is called to set the UART divisor registers to match
637 * the specified baud rate for a serial port.
638 */
Alan Cox216ba022008-10-13 10:40:19 +0100639static int mxser_change_speed(struct tty_struct *tty,
640 struct ktermios *old_termios)
Jiri Slaby1c456072008-02-07 00:16:46 -0800641{
Alan Cox216ba022008-10-13 10:40:19 +0100642 struct mxser_port *info = tty->driver_data;
Jiri Slaby1c456072008-02-07 00:16:46 -0800643 unsigned cflag, cval, fcr;
644 int ret = 0;
645 unsigned char status;
646
Alan Coxadc8d742012-07-14 15:31:47 +0100647 cflag = tty->termios.c_cflag;
Alan Cox216ba022008-10-13 10:40:19 +0100648 if (!info->ioaddr)
Jiri Slaby1c456072008-02-07 00:16:46 -0800649 return ret;
650
Alan Cox216ba022008-10-13 10:40:19 +0100651 if (mxser_set_baud_method[tty->index] == 0)
652 mxser_set_baud(tty, tty_get_baud_rate(tty));
Jiri Slaby1c456072008-02-07 00:16:46 -0800653
654 /* byte size and parity */
655 switch (cflag & CSIZE) {
656 case CS5:
657 cval = 0x00;
658 break;
659 case CS6:
660 cval = 0x01;
661 break;
662 case CS7:
663 cval = 0x02;
664 break;
665 case CS8:
666 cval = 0x03;
667 break;
668 default:
669 cval = 0x00;
670 break; /* too keep GCC shut... */
671 }
672 if (cflag & CSTOPB)
673 cval |= 0x04;
674 if (cflag & PARENB)
675 cval |= UART_LCR_PARITY;
676 if (!(cflag & PARODD))
677 cval |= UART_LCR_EPAR;
678 if (cflag & CMSPAR)
679 cval |= UART_LCR_SPAR;
680
681 if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
682 if (info->board->chip_flag) {
683 fcr = UART_FCR_ENABLE_FIFO;
684 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
Christoph Hellwig148ff862008-04-30 00:54:29 -0700685 mxser_set_must_fifo_value(info);
Jiri Slaby1c456072008-02-07 00:16:46 -0800686 } else
687 fcr = 0;
688 } else {
689 fcr = UART_FCR_ENABLE_FIFO;
690 if (info->board->chip_flag) {
691 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
Christoph Hellwig148ff862008-04-30 00:54:29 -0700692 mxser_set_must_fifo_value(info);
Jiri Slaby1c456072008-02-07 00:16:46 -0800693 } else {
694 switch (info->rx_trigger) {
695 case 1:
696 fcr |= UART_FCR_TRIGGER_1;
697 break;
698 case 4:
699 fcr |= UART_FCR_TRIGGER_4;
700 break;
701 case 8:
702 fcr |= UART_FCR_TRIGGER_8;
703 break;
704 default:
705 fcr |= UART_FCR_TRIGGER_14;
706 break;
707 }
708 }
709 }
710
711 /* CTS flow control flag and modem status interrupts */
712 info->IER &= ~UART_IER_MSI;
713 info->MCR &= ~UART_MCR_AFE;
Peter Hurley5604a982016-04-09 17:53:21 -0700714 tty_port_set_cts_flow(&info->port, cflag & CRTSCTS);
Jiri Slaby1c456072008-02-07 00:16:46 -0800715 if (cflag & CRTSCTS) {
Jiri Slaby1c456072008-02-07 00:16:46 -0800716 info->IER |= UART_IER_MSI;
717 if ((info->type == PORT_16550A) || (info->board->chip_flag)) {
718 info->MCR |= UART_MCR_AFE;
719 } else {
720 status = inb(info->ioaddr + UART_MSR);
Alan Cox216ba022008-10-13 10:40:19 +0100721 if (tty->hw_stopped) {
Jiri Slaby1c456072008-02-07 00:16:46 -0800722 if (status & UART_MSR_CTS) {
Alan Cox216ba022008-10-13 10:40:19 +0100723 tty->hw_stopped = 0;
Jiri Slaby1c456072008-02-07 00:16:46 -0800724 if (info->type != PORT_16550A &&
725 !info->board->chip_flag) {
726 outb(info->IER & ~UART_IER_THRI,
727 info->ioaddr +
728 UART_IER);
729 info->IER |= UART_IER_THRI;
730 outb(info->IER, info->ioaddr +
731 UART_IER);
732 }
Alan Cox216ba022008-10-13 10:40:19 +0100733 tty_wakeup(tty);
Jiri Slaby1c456072008-02-07 00:16:46 -0800734 }
735 } else {
736 if (!(status & UART_MSR_CTS)) {
Alan Cox216ba022008-10-13 10:40:19 +0100737 tty->hw_stopped = 1;
Jiri Slaby1c456072008-02-07 00:16:46 -0800738 if ((info->type != PORT_16550A) &&
739 (!info->board->chip_flag)) {
740 info->IER &= ~UART_IER_THRI;
741 outb(info->IER, info->ioaddr +
742 UART_IER);
743 }
744 }
745 }
746 }
Jiri Slaby1c456072008-02-07 00:16:46 -0800747 }
748 outb(info->MCR, info->ioaddr + UART_MCR);
Peter Hurley2d686552016-04-09 17:53:23 -0700749 tty_port_set_check_carrier(&info->port, ~cflag & CLOCAL);
750 if (~cflag & CLOCAL)
Jiri Slaby1c456072008-02-07 00:16:46 -0800751 info->IER |= UART_IER_MSI;
Jiri Slaby1c456072008-02-07 00:16:46 -0800752 outb(info->IER, info->ioaddr + UART_IER);
753
754 /*
755 * Set up parity check flag
756 */
757 info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
Alan Cox216ba022008-10-13 10:40:19 +0100758 if (I_INPCK(tty))
Jiri Slaby1c456072008-02-07 00:16:46 -0800759 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
Alan Cox216ba022008-10-13 10:40:19 +0100760 if (I_BRKINT(tty) || I_PARMRK(tty))
Jiri Slaby1c456072008-02-07 00:16:46 -0800761 info->read_status_mask |= UART_LSR_BI;
762
763 info->ignore_status_mask = 0;
764
Alan Cox216ba022008-10-13 10:40:19 +0100765 if (I_IGNBRK(tty)) {
Jiri Slaby1c456072008-02-07 00:16:46 -0800766 info->ignore_status_mask |= UART_LSR_BI;
767 info->read_status_mask |= UART_LSR_BI;
768 /*
769 * If we're ignore parity and break indicators, ignore
770 * overruns too. (For real raw support).
771 */
Alan Cox216ba022008-10-13 10:40:19 +0100772 if (I_IGNPAR(tty)) {
Jiri Slaby1c456072008-02-07 00:16:46 -0800773 info->ignore_status_mask |=
774 UART_LSR_OE |
775 UART_LSR_PE |
776 UART_LSR_FE;
777 info->read_status_mask |=
778 UART_LSR_OE |
779 UART_LSR_PE |
780 UART_LSR_FE;
781 }
782 }
783 if (info->board->chip_flag) {
Alan Cox216ba022008-10-13 10:40:19 +0100784 mxser_set_must_xon1_value(info->ioaddr, START_CHAR(tty));
785 mxser_set_must_xoff1_value(info->ioaddr, STOP_CHAR(tty));
786 if (I_IXON(tty)) {
Christoph Hellwig148ff862008-04-30 00:54:29 -0700787 mxser_enable_must_rx_software_flow_control(
788 info->ioaddr);
Jiri Slaby1c456072008-02-07 00:16:46 -0800789 } else {
Christoph Hellwig148ff862008-04-30 00:54:29 -0700790 mxser_disable_must_rx_software_flow_control(
791 info->ioaddr);
Jiri Slaby1c456072008-02-07 00:16:46 -0800792 }
Alan Cox216ba022008-10-13 10:40:19 +0100793 if (I_IXOFF(tty)) {
Christoph Hellwig148ff862008-04-30 00:54:29 -0700794 mxser_enable_must_tx_software_flow_control(
795 info->ioaddr);
Jiri Slaby1c456072008-02-07 00:16:46 -0800796 } else {
Christoph Hellwig148ff862008-04-30 00:54:29 -0700797 mxser_disable_must_tx_software_flow_control(
798 info->ioaddr);
Jiri Slaby1c456072008-02-07 00:16:46 -0800799 }
800 }
801
802
803 outb(fcr, info->ioaddr + UART_FCR); /* set fcr */
804 outb(cval, info->ioaddr + UART_LCR);
805
806 return ret;
807}
808
Alan Cox216ba022008-10-13 10:40:19 +0100809static void mxser_check_modem_status(struct tty_struct *tty,
810 struct mxser_port *port, int status)
Jiri Slaby1c456072008-02-07 00:16:46 -0800811{
812 /* update input line counters */
813 if (status & UART_MSR_TERI)
814 port->icount.rng++;
815 if (status & UART_MSR_DDSR)
816 port->icount.dsr++;
817 if (status & UART_MSR_DDCD)
818 port->icount.dcd++;
819 if (status & UART_MSR_DCTS)
820 port->icount.cts++;
821 port->mon_data.modem_status = status;
Alan Coxbdc04e32009-09-19 13:13:31 -0700822 wake_up_interruptible(&port->port.delta_msr_wait);
Jiri Slaby1c456072008-02-07 00:16:46 -0800823
Peter Hurley2d686552016-04-09 17:53:23 -0700824 if (tty_port_check_carrier(&port->port) && (status & UART_MSR_DDCD)) {
Jiri Slaby1c456072008-02-07 00:16:46 -0800825 if (status & UART_MSR_DCD)
Alan Cox0ad9e7d2008-07-16 21:56:10 +0100826 wake_up_interruptible(&port->port.open_wait);
Jiri Slaby1c456072008-02-07 00:16:46 -0800827 }
828
Huang Shijief21ec3d2012-08-22 22:13:36 -0400829 if (tty_port_cts_enabled(&port->port)) {
Alan Cox216ba022008-10-13 10:40:19 +0100830 if (tty->hw_stopped) {
Jiri Slaby1c456072008-02-07 00:16:46 -0800831 if (status & UART_MSR_CTS) {
Alan Cox216ba022008-10-13 10:40:19 +0100832 tty->hw_stopped = 0;
Jiri Slaby1c456072008-02-07 00:16:46 -0800833
834 if ((port->type != PORT_16550A) &&
835 (!port->board->chip_flag)) {
836 outb(port->IER & ~UART_IER_THRI,
837 port->ioaddr + UART_IER);
838 port->IER |= UART_IER_THRI;
839 outb(port->IER, port->ioaddr +
840 UART_IER);
841 }
Alan Cox216ba022008-10-13 10:40:19 +0100842 tty_wakeup(tty);
Jiri Slaby1c456072008-02-07 00:16:46 -0800843 }
844 } else {
845 if (!(status & UART_MSR_CTS)) {
Alan Cox216ba022008-10-13 10:40:19 +0100846 tty->hw_stopped = 1;
Jiri Slaby1c456072008-02-07 00:16:46 -0800847 if (port->type != PORT_16550A &&
848 !port->board->chip_flag) {
849 port->IER &= ~UART_IER_THRI;
850 outb(port->IER, port->ioaddr +
851 UART_IER);
852 }
853 }
854 }
855 }
856}
857
Alan Cox67691402009-11-30 13:17:35 +0000858static int mxser_activate(struct tty_port *port, struct tty_struct *tty)
Jiri Slaby1c456072008-02-07 00:16:46 -0800859{
Alan Cox67691402009-11-30 13:17:35 +0000860 struct mxser_port *info = container_of(port, struct mxser_port, port);
Jiri Slaby1c456072008-02-07 00:16:46 -0800861 unsigned long page;
862 unsigned long flags;
863
864 page = __get_free_page(GFP_KERNEL);
865 if (!page)
866 return -ENOMEM;
867
868 spin_lock_irqsave(&info->slock, flags);
869
Jiri Slaby1c456072008-02-07 00:16:46 -0800870 if (!info->ioaddr || !info->type) {
Alan Cox216ba022008-10-13 10:40:19 +0100871 set_bit(TTY_IO_ERROR, &tty->flags);
Jiri Slaby1c456072008-02-07 00:16:46 -0800872 free_page(page);
873 spin_unlock_irqrestore(&info->slock, flags);
874 return 0;
875 }
Alan Cox67691402009-11-30 13:17:35 +0000876 info->port.xmit_buf = (unsigned char *) page;
Jiri Slaby1c456072008-02-07 00:16:46 -0800877
878 /*
879 * Clear the FIFO buffers and disable them
880 * (they will be reenabled in mxser_change_speed())
881 */
882 if (info->board->chip_flag)
883 outb((UART_FCR_CLEAR_RCVR |
884 UART_FCR_CLEAR_XMIT |
885 MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR);
886 else
887 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
888 info->ioaddr + UART_FCR);
889
890 /*
891 * At this point there's no way the LSR could still be 0xFF;
892 * if it is, then bail out, because there's likely no UART
893 * here.
894 */
895 if (inb(info->ioaddr + UART_LSR) == 0xff) {
896 spin_unlock_irqrestore(&info->slock, flags);
897 if (capable(CAP_SYS_ADMIN)) {
Jiri Slabyf43a510d2009-12-09 12:34:15 -0800898 set_bit(TTY_IO_ERROR, &tty->flags);
Jiri Slaby1c456072008-02-07 00:16:46 -0800899 return 0;
900 } else
901 return -ENODEV;
902 }
903
904 /*
905 * Clear the interrupt registers.
906 */
907 (void) inb(info->ioaddr + UART_LSR);
908 (void) inb(info->ioaddr + UART_RX);
909 (void) inb(info->ioaddr + UART_IIR);
910 (void) inb(info->ioaddr + UART_MSR);
911
912 /*
913 * Now, initialize the UART
914 */
915 outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR); /* reset DLAB */
916 info->MCR = UART_MCR_DTR | UART_MCR_RTS;
917 outb(info->MCR, info->ioaddr + UART_MCR);
918
919 /*
920 * Finally, enable interrupts
921 */
922 info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
923
924 if (info->board->chip_flag)
925 info->IER |= MOXA_MUST_IER_EGDAI;
926 outb(info->IER, info->ioaddr + UART_IER); /* enable interrupts */
927
928 /*
929 * And clear the interrupt registers again for luck.
930 */
931 (void) inb(info->ioaddr + UART_LSR);
932 (void) inb(info->ioaddr + UART_RX);
933 (void) inb(info->ioaddr + UART_IIR);
934 (void) inb(info->ioaddr + UART_MSR);
935
Alan Cox216ba022008-10-13 10:40:19 +0100936 clear_bit(TTY_IO_ERROR, &tty->flags);
Jiri Slaby1c456072008-02-07 00:16:46 -0800937 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
938
939 /*
940 * and set the speed of the serial port
941 */
Alan Cox216ba022008-10-13 10:40:19 +0100942 mxser_change_speed(tty, NULL);
Jiri Slaby1c456072008-02-07 00:16:46 -0800943 spin_unlock_irqrestore(&info->slock, flags);
944
945 return 0;
946}
947
948/*
Alan Cox67691402009-11-30 13:17:35 +0000949 * This routine will shutdown a serial port
Jiri Slaby1c456072008-02-07 00:16:46 -0800950 */
Alan Cox67691402009-11-30 13:17:35 +0000951static void mxser_shutdown_port(struct tty_port *port)
Jiri Slaby1c456072008-02-07 00:16:46 -0800952{
Alan Cox67691402009-11-30 13:17:35 +0000953 struct mxser_port *info = container_of(port, struct mxser_port, port);
Jiri Slaby1c456072008-02-07 00:16:46 -0800954 unsigned long flags;
955
Jiri Slaby1c456072008-02-07 00:16:46 -0800956 spin_lock_irqsave(&info->slock, flags);
957
958 /*
959 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
960 * here so the queue might never be waken up
961 */
Alan Coxbdc04e32009-09-19 13:13:31 -0700962 wake_up_interruptible(&info->port.delta_msr_wait);
Jiri Slaby1c456072008-02-07 00:16:46 -0800963
964 /*
Alan Cox67691402009-11-30 13:17:35 +0000965 * Free the xmit buffer, if necessary
Jiri Slaby1c456072008-02-07 00:16:46 -0800966 */
Alan Cox0ad9e7d2008-07-16 21:56:10 +0100967 if (info->port.xmit_buf) {
968 free_page((unsigned long) info->port.xmit_buf);
969 info->port.xmit_buf = NULL;
Jiri Slaby1c456072008-02-07 00:16:46 -0800970 }
971
972 info->IER = 0;
973 outb(0x00, info->ioaddr + UART_IER);
974
Jiri Slaby1c456072008-02-07 00:16:46 -0800975 /* clear Rx/Tx FIFO's */
976 if (info->board->chip_flag)
977 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT |
978 MOXA_MUST_FCR_GDA_MODE_ENABLE,
979 info->ioaddr + UART_FCR);
980 else
981 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
982 info->ioaddr + UART_FCR);
983
984 /* read data port to reset things */
985 (void) inb(info->ioaddr + UART_RX);
986
Jiri Slaby1c456072008-02-07 00:16:46 -0800987
988 if (info->board->chip_flag)
989 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr);
990
991 spin_unlock_irqrestore(&info->slock, flags);
992}
993
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994/*
995 * This routine is called whenever a serial port is opened. It
996 * enables interrupts for a serial port, linking in its async structure into
997 * the IRQ chain. It also performs the serial-specific
998 * initialization for the tty structure.
999 */
1000static int mxser_open(struct tty_struct *tty, struct file *filp)
1001{
Jiri Slaby1c456072008-02-07 00:16:46 -08001002 struct mxser_port *info;
Alan Cox67691402009-11-30 13:17:35 +00001003 int line;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001004
1005 line = tty->index;
1006 if (line == MXSER_PORTS)
1007 return 0;
Jiri Slaby1c456072008-02-07 00:16:46 -08001008 info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD];
1009 if (!info->ioaddr)
Jesper Juhl8ea2c2e2006-06-25 05:47:54 -07001010 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001011
Alan Coxa2d1e352010-04-23 16:01:18 +01001012 tty->driver_data = info;
Alan Cox67691402009-11-30 13:17:35 +00001013 return tty_port_open(&info->port, tty, filp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001014}
1015
Alan Cox978e5952008-04-30 00:53:59 -07001016static void mxser_flush_buffer(struct tty_struct *tty)
1017{
1018 struct mxser_port *info = tty->driver_data;
1019 char fcr;
1020 unsigned long flags;
1021
1022
1023 spin_lock_irqsave(&info->slock, flags);
1024 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1025
1026 fcr = inb(info->ioaddr + UART_FCR);
1027 outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
1028 info->ioaddr + UART_FCR);
1029 outb(fcr, info->ioaddr + UART_FCR);
1030
1031 spin_unlock_irqrestore(&info->slock, flags);
1032
1033 tty_wakeup(tty);
1034}
1035
1036
Alan Cox67691402009-11-30 13:17:35 +00001037static void mxser_close_port(struct tty_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038{
Alan Cox1e2b0252009-09-19 13:13:21 -07001039 struct mxser_port *info = container_of(port, struct mxser_port, port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001040 unsigned long timeout;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001041 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001042 * At this point we stop accepting input. To do this, we
1043 * disable the receive line status interrupts, and tell the
1044 * interrupt driver to stop checking the data ready bit in the
1045 * line status register.
1046 */
1047 info->IER &= ~UART_IER_RLSI;
Jiri Slaby1c456072008-02-07 00:16:46 -08001048 if (info->board->chip_flag)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001049 info->IER &= ~MOXA_MUST_RECV_ISR;
Jiri Slaby1c456072008-02-07 00:16:46 -08001050
Alan Cox67691402009-11-30 13:17:35 +00001051 outb(info->IER, info->ioaddr + UART_IER);
1052 /*
1053 * Before we drop DTR, make sure the UART transmitter
1054 * has completely drained; this is especially
1055 * important if there is a transmit FIFO!
1056 */
1057 timeout = jiffies + HZ;
1058 while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) {
1059 schedule_timeout_interruptible(5);
1060 if (time_after(jiffies, timeout))
1061 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001062 }
Alan Cox1e2b0252009-09-19 13:13:21 -07001063}
1064
1065/*
1066 * This routine is called when the serial port gets closed. First, we
1067 * wait for the last remaining data to be sent. Then, we unlink its
1068 * async structure from the interrupt chain if necessary, and we free
1069 * that IRQ if nothing is left in the chain.
1070 */
1071static void mxser_close(struct tty_struct *tty, struct file *filp)
1072{
1073 struct mxser_port *info = tty->driver_data;
1074 struct tty_port *port = &info->port;
1075
Alan Coxa2d1e352010-04-23 16:01:18 +01001076 if (tty->index == MXSER_PORTS || info == NULL)
Alan Cox1e2b0252009-09-19 13:13:21 -07001077 return;
1078 if (tty_port_close_start(port, tty, filp) == 0)
1079 return;
Peter Hurleycd7b4b32016-01-10 14:51:38 -08001080 info->closing = 1;
Alan Cox67691402009-11-30 13:17:35 +00001081 mutex_lock(&port->mutex);
1082 mxser_close_port(port);
Alan Cox1e2b0252009-09-19 13:13:21 -07001083 mxser_flush_buffer(tty);
Peter Hurleyd41861c2016-04-09 17:53:25 -07001084 if (tty_port_initialized(port) && C_HUPCL(tty))
1085 tty_port_lower_dtr_rts(port);
Alan Cox67691402009-11-30 13:17:35 +00001086 mxser_shutdown_port(port);
Peter Hurleyd41861c2016-04-09 17:53:25 -07001087 tty_port_set_initialized(port, 0);
Alan Cox67691402009-11-30 13:17:35 +00001088 mutex_unlock(&port->mutex);
Peter Hurleycd7b4b32016-01-10 14:51:38 -08001089 info->closing = 0;
Alan Coxa6614992009-01-02 13:46:50 +00001090 /* Right now the tty_port set is done outside of the close_end helper
1091 as we don't yet have everyone using refcounts */
1092 tty_port_close_end(port, tty);
1093 tty_port_tty_set(port, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001094}
1095
1096static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1097{
1098 int c, total = 0;
Jiri Slaby1c456072008-02-07 00:16:46 -08001099 struct mxser_port *info = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100 unsigned long flags;
1101
Alan Cox0ad9e7d2008-07-16 21:56:10 +01001102 if (!info->port.xmit_buf)
Jesper Juhl8ea2c2e2006-06-25 05:47:54 -07001103 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001104
1105 while (1) {
Jesper Juhl8ea2c2e2006-06-25 05:47:54 -07001106 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
1107 SERIAL_XMIT_SIZE - info->xmit_head));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001108 if (c <= 0)
1109 break;
1110
Alan Cox0ad9e7d2008-07-16 21:56:10 +01001111 memcpy(info->port.xmit_buf + info->xmit_head, buf, c);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001112 spin_lock_irqsave(&info->slock, flags);
Jesper Juhl8ea2c2e2006-06-25 05:47:54 -07001113 info->xmit_head = (info->xmit_head + c) &
1114 (SERIAL_XMIT_SIZE - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001115 info->xmit_cnt += c;
1116 spin_unlock_irqrestore(&info->slock, flags);
1117
1118 buf += c;
1119 count -= c;
1120 total += c;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001121 }
1122
Jiri Slaby1c456072008-02-07 00:16:46 -08001123 if (info->xmit_cnt && !tty->stopped) {
Jesper Juhl8ea2c2e2006-06-25 05:47:54 -07001124 if (!tty->hw_stopped ||
1125 (info->type == PORT_16550A) ||
Jiri Slaby1c456072008-02-07 00:16:46 -08001126 (info->board->chip_flag)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001127 spin_lock_irqsave(&info->slock, flags);
Jiri Slaby1c456072008-02-07 00:16:46 -08001128 outb(info->IER & ~UART_IER_THRI, info->ioaddr +
1129 UART_IER);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001130 info->IER |= UART_IER_THRI;
Jiri Slaby1c456072008-02-07 00:16:46 -08001131 outb(info->IER, info->ioaddr + UART_IER);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001132 spin_unlock_irqrestore(&info->slock, flags);
1133 }
1134 }
1135 return total;
1136}
1137
Alan Cox0be2ead2008-04-30 00:54:03 -07001138static int mxser_put_char(struct tty_struct *tty, unsigned char ch)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139{
Jiri Slaby1c456072008-02-07 00:16:46 -08001140 struct mxser_port *info = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001141 unsigned long flags;
1142
Alan Cox0ad9e7d2008-07-16 21:56:10 +01001143 if (!info->port.xmit_buf)
Alan Cox0be2ead2008-04-30 00:54:03 -07001144 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001145
1146 if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
Alan Cox0be2ead2008-04-30 00:54:03 -07001147 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001148
1149 spin_lock_irqsave(&info->slock, flags);
Alan Cox0ad9e7d2008-07-16 21:56:10 +01001150 info->port.xmit_buf[info->xmit_head++] = ch;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001151 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1152 info->xmit_cnt++;
1153 spin_unlock_irqrestore(&info->slock, flags);
Jiri Slaby1c456072008-02-07 00:16:46 -08001154 if (!tty->stopped) {
Jesper Juhl8ea2c2e2006-06-25 05:47:54 -07001155 if (!tty->hw_stopped ||
1156 (info->type == PORT_16550A) ||
Jiri Slaby1c456072008-02-07 00:16:46 -08001157 info->board->chip_flag) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001158 spin_lock_irqsave(&info->slock, flags);
Jiri Slaby1c456072008-02-07 00:16:46 -08001159 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001160 info->IER |= UART_IER_THRI;
Jiri Slaby1c456072008-02-07 00:16:46 -08001161 outb(info->IER, info->ioaddr + UART_IER);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001162 spin_unlock_irqrestore(&info->slock, flags);
1163 }
1164 }
Alan Cox0be2ead2008-04-30 00:54:03 -07001165 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001166}
1167
1168
1169static void mxser_flush_chars(struct tty_struct *tty)
1170{
Jiri Slaby1c456072008-02-07 00:16:46 -08001171 struct mxser_port *info = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001172 unsigned long flags;
1173
Jiri Slabyace7dd92008-07-25 01:48:22 -07001174 if (info->xmit_cnt <= 0 || tty->stopped || !info->port.xmit_buf ||
1175 (tty->hw_stopped && info->type != PORT_16550A &&
1176 !info->board->chip_flag))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001177 return;
1178
1179 spin_lock_irqsave(&info->slock, flags);
1180
Jiri Slaby1c456072008-02-07 00:16:46 -08001181 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001182 info->IER |= UART_IER_THRI;
Jiri Slaby1c456072008-02-07 00:16:46 -08001183 outb(info->IER, info->ioaddr + UART_IER);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001184
1185 spin_unlock_irqrestore(&info->slock, flags);
1186}
1187
1188static int mxser_write_room(struct tty_struct *tty)
1189{
Jiri Slaby1c456072008-02-07 00:16:46 -08001190 struct mxser_port *info = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001191 int ret;
1192
1193 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
Jiri Slabyace7dd92008-07-25 01:48:22 -07001194 return ret < 0 ? 0 : ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001195}
1196
1197static int mxser_chars_in_buffer(struct tty_struct *tty)
1198{
Jiri Slaby1c456072008-02-07 00:16:46 -08001199 struct mxser_port *info = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001200 return info->xmit_cnt;
1201}
1202
Jiri Slaby1c456072008-02-07 00:16:46 -08001203/*
1204 * ------------------------------------------------------------
1205 * friends of mxser_ioctl()
1206 * ------------------------------------------------------------
1207 */
Alan Cox216ba022008-10-13 10:40:19 +01001208static int mxser_get_serial_info(struct tty_struct *tty,
Jiri Slaby1c456072008-02-07 00:16:46 -08001209 struct serial_struct __user *retinfo)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001210{
Alan Cox216ba022008-10-13 10:40:19 +01001211 struct mxser_port *info = tty->driver_data;
Jiri Slaby1c456072008-02-07 00:16:46 -08001212 struct serial_struct tmp = {
1213 .type = info->type,
Alan Cox216ba022008-10-13 10:40:19 +01001214 .line = tty->index,
Jiri Slaby1c456072008-02-07 00:16:46 -08001215 .port = info->ioaddr,
1216 .irq = info->board->irq,
Alan Cox0ad9e7d2008-07-16 21:56:10 +01001217 .flags = info->port.flags,
Jiri Slaby1c456072008-02-07 00:16:46 -08001218 .baud_base = info->baud_base,
Alan Cox44b7d1b2008-07-16 21:57:18 +01001219 .close_delay = info->port.close_delay,
1220 .closing_wait = info->port.closing_wait,
Jiri Slaby1c456072008-02-07 00:16:46 -08001221 .custom_divisor = info->custom_divisor,
1222 .hub6 = 0
1223 };
1224 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1225 return -EFAULT;
1226 return 0;
1227}
1228
Alan Cox216ba022008-10-13 10:40:19 +01001229static int mxser_set_serial_info(struct tty_struct *tty,
Jiri Slaby1c456072008-02-07 00:16:46 -08001230 struct serial_struct __user *new_info)
1231{
Alan Cox216ba022008-10-13 10:40:19 +01001232 struct mxser_port *info = tty->driver_data;
Alan Cox07f86c02009-11-30 13:17:41 +00001233 struct tty_port *port = &info->port;
Jiri Slaby1c456072008-02-07 00:16:46 -08001234 struct serial_struct new_serial;
Jiri Slaby80ff8a82008-02-07 00:16:51 -08001235 speed_t baud;
Jiri Slaby1c456072008-02-07 00:16:46 -08001236 unsigned long sl_flags;
1237 unsigned int flags;
1238 int retval = 0;
1239
1240 if (!new_info || !info->ioaddr)
Jiri Slaby80ff8a82008-02-07 00:16:51 -08001241 return -ENODEV;
Jiri Slaby1c456072008-02-07 00:16:46 -08001242 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
1243 return -EFAULT;
1244
Jiri Slaby80ff8a82008-02-07 00:16:51 -08001245 if (new_serial.irq != info->board->irq ||
1246 new_serial.port != info->ioaddr)
1247 return -EINVAL;
Jiri Slaby1c456072008-02-07 00:16:46 -08001248
Alan Cox07f86c02009-11-30 13:17:41 +00001249 flags = port->flags & ASYNC_SPD_MASK;
Jiri Slaby1c456072008-02-07 00:16:46 -08001250
1251 if (!capable(CAP_SYS_ADMIN)) {
1252 if ((new_serial.baud_base != info->baud_base) ||
Alan Cox44b7d1b2008-07-16 21:57:18 +01001253 (new_serial.close_delay != info->port.close_delay) ||
Alan Cox0ad9e7d2008-07-16 21:56:10 +01001254 ((new_serial.flags & ~ASYNC_USR_MASK) != (info->port.flags & ~ASYNC_USR_MASK)))
Jiri Slaby1c456072008-02-07 00:16:46 -08001255 return -EPERM;
Alan Cox0ad9e7d2008-07-16 21:56:10 +01001256 info->port.flags = ((info->port.flags & ~ASYNC_USR_MASK) |
Jiri Slaby1c456072008-02-07 00:16:46 -08001257 (new_serial.flags & ASYNC_USR_MASK));
1258 } else {
1259 /*
1260 * OK, past this point, all the error checking has been done.
1261 * At this point, we start making changes.....
1262 */
Alan Cox07f86c02009-11-30 13:17:41 +00001263 port->flags = ((port->flags & ~ASYNC_FLAGS) |
Jiri Slaby1c456072008-02-07 00:16:46 -08001264 (new_serial.flags & ASYNC_FLAGS));
Alan Cox07f86c02009-11-30 13:17:41 +00001265 port->close_delay = new_serial.close_delay * HZ / 100;
1266 port->closing_wait = new_serial.closing_wait * HZ / 100;
Jiri Slabyd6c53c02013-01-03 15:53:05 +01001267 port->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
Alan Cox07f86c02009-11-30 13:17:41 +00001268 if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST &&
Jiri Slaby80ff8a82008-02-07 00:16:51 -08001269 (new_serial.baud_base != info->baud_base ||
1270 new_serial.custom_divisor !=
1271 info->custom_divisor)) {
Alan Cox07f86c02009-11-30 13:17:41 +00001272 if (new_serial.custom_divisor == 0)
1273 return -EINVAL;
Jiri Slaby80ff8a82008-02-07 00:16:51 -08001274 baud = new_serial.baud_base / new_serial.custom_divisor;
Alan Cox216ba022008-10-13 10:40:19 +01001275 tty_encode_baud_rate(tty, baud, baud);
Jiri Slaby80ff8a82008-02-07 00:16:51 -08001276 }
Jiri Slaby1c456072008-02-07 00:16:46 -08001277 }
1278
1279 info->type = new_serial.type;
1280
1281 process_txrx_fifo(info);
1282
Peter Hurleyd41861c2016-04-09 17:53:25 -07001283 if (tty_port_initialized(port)) {
Alan Cox07f86c02009-11-30 13:17:41 +00001284 if (flags != (port->flags & ASYNC_SPD_MASK)) {
Jiri Slaby1c456072008-02-07 00:16:46 -08001285 spin_lock_irqsave(&info->slock, sl_flags);
Alan Cox216ba022008-10-13 10:40:19 +01001286 mxser_change_speed(tty, NULL);
Jiri Slaby1c456072008-02-07 00:16:46 -08001287 spin_unlock_irqrestore(&info->slock, sl_flags);
1288 }
Alan Cox67691402009-11-30 13:17:35 +00001289 } else {
Alan Cox07f86c02009-11-30 13:17:41 +00001290 retval = mxser_activate(port, tty);
Alan Cox67691402009-11-30 13:17:35 +00001291 if (retval == 0)
Peter Hurleyd41861c2016-04-09 17:53:25 -07001292 tty_port_set_initialized(port, 1);
Alan Cox67691402009-11-30 13:17:35 +00001293 }
Jiri Slaby1c456072008-02-07 00:16:46 -08001294 return retval;
1295}
1296
1297/*
1298 * mxser_get_lsr_info - get line status register info
1299 *
1300 * Purpose: Let user call ioctl() to get info when the UART physically
1301 * is emptied. On bus types like RS485, the transmitter must
1302 * release the bus after transmitting. This must be done when
1303 * the transmit shift register is empty, not be done when the
1304 * transmit holding register is empty. This functionality
1305 * allows an RS485 driver to be written in user space.
1306 */
1307static int mxser_get_lsr_info(struct mxser_port *info,
1308 unsigned int __user *value)
1309{
1310 unsigned char status;
1311 unsigned int result;
1312 unsigned long flags;
1313
1314 spin_lock_irqsave(&info->slock, flags);
1315 status = inb(info->ioaddr + UART_LSR);
1316 spin_unlock_irqrestore(&info->slock, flags);
1317 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1318 return put_user(result, value);
1319}
1320
Alan Cox60b33c12011-02-14 16:26:14 +00001321static int mxser_tiocmget(struct tty_struct *tty)
Jiri Slaby1c456072008-02-07 00:16:46 -08001322{
1323 struct mxser_port *info = tty->driver_data;
1324 unsigned char control, status;
1325 unsigned long flags;
1326
1327
1328 if (tty->index == MXSER_PORTS)
1329 return -ENOIOCTLCMD;
Peter Hurley18900ca2016-04-09 17:06:48 -07001330 if (tty_io_error(tty))
Jiri Slaby1c456072008-02-07 00:16:46 -08001331 return -EIO;
1332
1333 control = info->MCR;
1334
1335 spin_lock_irqsave(&info->slock, flags);
1336 status = inb(info->ioaddr + UART_MSR);
1337 if (status & UART_MSR_ANY_DELTA)
Alan Cox216ba022008-10-13 10:40:19 +01001338 mxser_check_modem_status(tty, info, status);
Jiri Slaby1c456072008-02-07 00:16:46 -08001339 spin_unlock_irqrestore(&info->slock, flags);
1340 return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
1341 ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
1342 ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
1343 ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
1344 ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
1345 ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1346}
1347
Alan Cox20b9d172011-02-14 16:26:50 +00001348static int mxser_tiocmset(struct tty_struct *tty,
Jiri Slaby1c456072008-02-07 00:16:46 -08001349 unsigned int set, unsigned int clear)
1350{
1351 struct mxser_port *info = tty->driver_data;
1352 unsigned long flags;
1353
1354
1355 if (tty->index == MXSER_PORTS)
1356 return -ENOIOCTLCMD;
Peter Hurley18900ca2016-04-09 17:06:48 -07001357 if (tty_io_error(tty))
Jiri Slaby1c456072008-02-07 00:16:46 -08001358 return -EIO;
1359
1360 spin_lock_irqsave(&info->slock, flags);
1361
1362 if (set & TIOCM_RTS)
1363 info->MCR |= UART_MCR_RTS;
1364 if (set & TIOCM_DTR)
1365 info->MCR |= UART_MCR_DTR;
1366
1367 if (clear & TIOCM_RTS)
1368 info->MCR &= ~UART_MCR_RTS;
1369 if (clear & TIOCM_DTR)
1370 info->MCR &= ~UART_MCR_DTR;
1371
1372 outb(info->MCR, info->ioaddr + UART_MCR);
1373 spin_unlock_irqrestore(&info->slock, flags);
1374 return 0;
1375}
1376
1377static int __init mxser_program_mode(int port)
1378{
1379 int id, i, j, n;
1380
1381 outb(0, port);
1382 outb(0, port);
1383 outb(0, port);
1384 (void)inb(port);
1385 (void)inb(port);
1386 outb(0, port);
1387 (void)inb(port);
1388
1389 id = inb(port + 1) & 0x1F;
1390 if ((id != C168_ASIC_ID) &&
1391 (id != C104_ASIC_ID) &&
1392 (id != C102_ASIC_ID) &&
1393 (id != CI132_ASIC_ID) &&
1394 (id != CI134_ASIC_ID) &&
1395 (id != CI104J_ASIC_ID))
1396 return -1;
1397 for (i = 0, j = 0; i < 4; i++) {
1398 n = inb(port + 2);
1399 if (n == 'M') {
1400 j = 1;
1401 } else if ((j == 1) && (n == 1)) {
1402 j = 2;
1403 break;
1404 } else
1405 j = 0;
1406 }
1407 if (j != 2)
1408 id = -2;
1409 return id;
1410}
1411
1412static void __init mxser_normal_mode(int port)
1413{
1414 int i, n;
1415
1416 outb(0xA5, port + 1);
1417 outb(0x80, port + 3);
1418 outb(12, port + 0); /* 9600 bps */
1419 outb(0, port + 1);
1420 outb(0x03, port + 3); /* 8 data bits */
1421 outb(0x13, port + 4); /* loop back mode */
1422 for (i = 0; i < 16; i++) {
1423 n = inb(port + 5);
1424 if ((n & 0x61) == 0x60)
1425 break;
1426 if ((n & 1) == 1)
1427 (void)inb(port);
1428 }
1429 outb(0x00, port + 4);
1430}
1431
1432#define CHIP_SK 0x01 /* Serial Data Clock in Eprom */
1433#define CHIP_DO 0x02 /* Serial Data Output in Eprom */
1434#define CHIP_CS 0x04 /* Serial Chip Select in Eprom */
1435#define CHIP_DI 0x08 /* Serial Data Input in Eprom */
1436#define EN_CCMD 0x000 /* Chip's command register */
1437#define EN0_RSARLO 0x008 /* Remote start address reg 0 */
1438#define EN0_RSARHI 0x009 /* Remote start address reg 1 */
1439#define EN0_RCNTLO 0x00A /* Remote byte count reg WR */
1440#define EN0_RCNTHI 0x00B /* Remote byte count reg WR */
1441#define EN0_DCFG 0x00E /* Data configuration reg WR */
1442#define EN0_PORT 0x010 /* Rcv missed frame error counter RD */
1443#define ENC_PAGE0 0x000 /* Select page 0 of chip registers */
1444#define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */
1445static int __init mxser_read_register(int port, unsigned short *regs)
1446{
1447 int i, k, value, id;
1448 unsigned int j;
1449
1450 id = mxser_program_mode(port);
1451 if (id < 0)
1452 return id;
1453 for (i = 0; i < 14; i++) {
1454 k = (i & 0x3F) | 0x180;
1455 for (j = 0x100; j > 0; j >>= 1) {
1456 outb(CHIP_CS, port);
1457 if (k & j) {
1458 outb(CHIP_CS | CHIP_DO, port);
1459 outb(CHIP_CS | CHIP_DO | CHIP_SK, port); /* A? bit of read */
1460 } else {
1461 outb(CHIP_CS, port);
1462 outb(CHIP_CS | CHIP_SK, port); /* A? bit of read */
1463 }
1464 }
1465 (void)inb(port);
1466 value = 0;
1467 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
1468 outb(CHIP_CS, port);
1469 outb(CHIP_CS | CHIP_SK, port);
1470 if (inb(port) & CHIP_DI)
1471 value |= j;
1472 }
1473 regs[i] = value;
1474 outb(0, port);
1475 }
1476 mxser_normal_mode(port);
1477 return id;
1478}
1479
1480static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1481{
Alan Cox07f86c02009-11-30 13:17:41 +00001482 struct mxser_port *ip;
1483 struct tty_port *port;
Alan Cox216ba022008-10-13 10:40:19 +01001484 struct tty_struct *tty;
Jiri Slaby1c456072008-02-07 00:16:46 -08001485 int result, status;
1486 unsigned int i, j;
Alan Cox9d6d1622008-04-30 00:53:20 -07001487 int ret = 0;
Jiri Slaby1c456072008-02-07 00:16:46 -08001488
1489 switch (cmd) {
1490 case MOXA_GET_MAJOR:
Manuel Zerpies5a3c6b22011-06-16 14:07:22 +02001491 printk_ratelimited(KERN_WARNING "mxser: '%s' uses deprecated ioctl "
Jiri Slaby8f3d1372008-07-29 22:33:38 -07001492 "%x (GET_MAJOR), fix your userspace\n",
1493 current->comm, cmd);
Jiri Slaby1c456072008-02-07 00:16:46 -08001494 return put_user(ttymajor, (int __user *)argp);
1495
1496 case MOXA_CHKPORTENABLE:
1497 result = 0;
Jiri Slaby1c456072008-02-07 00:16:46 -08001498 for (i = 0; i < MXSER_BOARDS; i++)
1499 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++)
1500 if (mxser_boards[i].ports[j].ioaddr)
1501 result |= (1 << i);
Jiri Slaby1c456072008-02-07 00:16:46 -08001502 return put_user(result, (unsigned long __user *)argp);
1503 case MOXA_GETDATACOUNT:
Alan Cox07f86c02009-11-30 13:17:41 +00001504 /* The receive side is locked by port->slock but it isn't
1505 clear that an exact snapshot is worth copying here */
Jiri Slaby1c456072008-02-07 00:16:46 -08001506 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
Alan Cox9d6d1622008-04-30 00:53:20 -07001507 ret = -EFAULT;
Alan Cox9d6d1622008-04-30 00:53:20 -07001508 return ret;
Jiri Slaby72800df2008-07-25 01:48:20 -07001509 case MOXA_GETMSTATUS: {
1510 struct mxser_mstatus ms, __user *msu = argp;
Jiri Slaby1c456072008-02-07 00:16:46 -08001511 for (i = 0; i < MXSER_BOARDS; i++)
1512 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
Alan Cox07f86c02009-11-30 13:17:41 +00001513 ip = &mxser_boards[i].ports[j];
1514 port = &ip->port;
Jiri Slaby72800df2008-07-25 01:48:20 -07001515 memset(&ms, 0, sizeof(ms));
Jiri Slaby1c456072008-02-07 00:16:46 -08001516
Alan Cox07f86c02009-11-30 13:17:41 +00001517 mutex_lock(&port->mutex);
1518 if (!ip->ioaddr)
Jiri Slaby72800df2008-07-25 01:48:20 -07001519 goto copy;
Alan Cox216ba022008-10-13 10:40:19 +01001520
Alan Cox07f86c02009-11-30 13:17:41 +00001521 tty = tty_port_tty_get(port);
Jiri Slaby1c456072008-02-07 00:16:46 -08001522
Alan Coxadc8d742012-07-14 15:31:47 +01001523 if (!tty)
Alan Cox07f86c02009-11-30 13:17:41 +00001524 ms.cflag = ip->normal_termios.c_cflag;
Jiri Slaby1c456072008-02-07 00:16:46 -08001525 else
Alan Coxadc8d742012-07-14 15:31:47 +01001526 ms.cflag = tty->termios.c_cflag;
Alan Cox216ba022008-10-13 10:40:19 +01001527 tty_kref_put(tty);
Alan Cox07f86c02009-11-30 13:17:41 +00001528 spin_lock_irq(&ip->slock);
1529 status = inb(ip->ioaddr + UART_MSR);
1530 spin_unlock_irq(&ip->slock);
Jiri Slaby72800df2008-07-25 01:48:20 -07001531 if (status & UART_MSR_DCD)
1532 ms.dcd = 1;
1533 if (status & UART_MSR_DSR)
1534 ms.dsr = 1;
1535 if (status & UART_MSR_CTS)
1536 ms.cts = 1;
1537 copy:
Alan Cox07f86c02009-11-30 13:17:41 +00001538 mutex_unlock(&port->mutex);
1539 if (copy_to_user(msu, &ms, sizeof(ms)))
Jiri Slaby72800df2008-07-25 01:48:20 -07001540 return -EFAULT;
Jiri Slaby72800df2008-07-25 01:48:20 -07001541 msu++;
Jiri Slaby1c456072008-02-07 00:16:46 -08001542 }
Jiri Slaby1c456072008-02-07 00:16:46 -08001543 return 0;
Jiri Slaby72800df2008-07-25 01:48:20 -07001544 }
Jiri Slaby1c456072008-02-07 00:16:46 -08001545 case MOXA_ASPP_MON_EXT: {
Jiri Slaby72800df2008-07-25 01:48:20 -07001546 struct mxser_mon_ext *me; /* it's 2k, stack unfriendly */
1547 unsigned int cflag, iflag, p;
1548 u8 opmode;
1549
1550 me = kzalloc(sizeof(*me), GFP_KERNEL);
1551 if (!me)
1552 return -ENOMEM;
Jiri Slaby1c456072008-02-07 00:16:46 -08001553
Jiri Slaby72800df2008-07-25 01:48:20 -07001554 for (i = 0, p = 0; i < MXSER_BOARDS; i++) {
1555 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++, p++) {
1556 if (p >= ARRAY_SIZE(me->rx_cnt)) {
1557 i = MXSER_BOARDS;
1558 break;
1559 }
Alan Cox07f86c02009-11-30 13:17:41 +00001560 ip = &mxser_boards[i].ports[j];
1561 port = &ip->port;
Jiri Slaby1c456072008-02-07 00:16:46 -08001562
Alan Cox07f86c02009-11-30 13:17:41 +00001563 mutex_lock(&port->mutex);
1564 if (!ip->ioaddr) {
1565 mutex_unlock(&port->mutex);
1566 continue;
1567 }
1568
1569 spin_lock_irq(&ip->slock);
1570 status = mxser_get_msr(ip->ioaddr, 0, p);
Jiri Slaby1c456072008-02-07 00:16:46 -08001571
1572 if (status & UART_MSR_TERI)
Alan Cox07f86c02009-11-30 13:17:41 +00001573 ip->icount.rng++;
Jiri Slaby1c456072008-02-07 00:16:46 -08001574 if (status & UART_MSR_DDSR)
Alan Cox07f86c02009-11-30 13:17:41 +00001575 ip->icount.dsr++;
Jiri Slaby1c456072008-02-07 00:16:46 -08001576 if (status & UART_MSR_DDCD)
Alan Cox07f86c02009-11-30 13:17:41 +00001577 ip->icount.dcd++;
Jiri Slaby1c456072008-02-07 00:16:46 -08001578 if (status & UART_MSR_DCTS)
Alan Cox07f86c02009-11-30 13:17:41 +00001579 ip->icount.cts++;
Jiri Slaby1c456072008-02-07 00:16:46 -08001580
Alan Cox07f86c02009-11-30 13:17:41 +00001581 ip->mon_data.modem_status = status;
1582 me->rx_cnt[p] = ip->mon_data.rxcnt;
1583 me->tx_cnt[p] = ip->mon_data.txcnt;
1584 me->up_rxcnt[p] = ip->mon_data.up_rxcnt;
1585 me->up_txcnt[p] = ip->mon_data.up_txcnt;
Jiri Slaby72800df2008-07-25 01:48:20 -07001586 me->modem_status[p] =
Alan Cox07f86c02009-11-30 13:17:41 +00001587 ip->mon_data.modem_status;
1588 spin_unlock_irq(&ip->slock);
1589
1590 tty = tty_port_tty_get(&ip->port);
Jiri Slaby1c456072008-02-07 00:16:46 -08001591
Alan Coxadc8d742012-07-14 15:31:47 +01001592 if (!tty) {
Alan Cox07f86c02009-11-30 13:17:41 +00001593 cflag = ip->normal_termios.c_cflag;
1594 iflag = ip->normal_termios.c_iflag;
1595 me->baudrate[p] = tty_termios_baud_rate(&ip->normal_termios);
Jiri Slaby1c456072008-02-07 00:16:46 -08001596 } else {
Alan Coxadc8d742012-07-14 15:31:47 +01001597 cflag = tty->termios.c_cflag;
1598 iflag = tty->termios.c_iflag;
Alan Cox216ba022008-10-13 10:40:19 +01001599 me->baudrate[p] = tty_get_baud_rate(tty);
Jiri Slaby1c456072008-02-07 00:16:46 -08001600 }
Alan Cox216ba022008-10-13 10:40:19 +01001601 tty_kref_put(tty);
Jiri Slaby1c456072008-02-07 00:16:46 -08001602
Jiri Slaby72800df2008-07-25 01:48:20 -07001603 me->databits[p] = cflag & CSIZE;
1604 me->stopbits[p] = cflag & CSTOPB;
1605 me->parity[p] = cflag & (PARENB | PARODD |
1606 CMSPAR);
Jiri Slaby1c456072008-02-07 00:16:46 -08001607
1608 if (cflag & CRTSCTS)
Jiri Slaby72800df2008-07-25 01:48:20 -07001609 me->flowctrl[p] |= 0x03;
Jiri Slaby1c456072008-02-07 00:16:46 -08001610
1611 if (iflag & (IXON | IXOFF))
Jiri Slaby72800df2008-07-25 01:48:20 -07001612 me->flowctrl[p] |= 0x0C;
Jiri Slaby1c456072008-02-07 00:16:46 -08001613
Alan Cox07f86c02009-11-30 13:17:41 +00001614 if (ip->type == PORT_16550A)
Jiri Slaby72800df2008-07-25 01:48:20 -07001615 me->fifo[p] = 1;
Jiri Slaby1c456072008-02-07 00:16:46 -08001616
Matwey V. Kornilovdfc7b832013-05-21 13:57:37 +04001617 if (ip->board->chip_flag == MOXA_MUST_MU860_HWID) {
1618 opmode = inb(ip->opmode_ioaddr)>>((p % 4) * 2);
1619 opmode &= OP_MODE_MASK;
1620 } else {
1621 opmode = RS232_MODE;
1622 }
Jiri Slaby72800df2008-07-25 01:48:20 -07001623 me->iftype[p] = opmode;
Alan Cox07f86c02009-11-30 13:17:41 +00001624 mutex_unlock(&port->mutex);
Jiri Slaby1c456072008-02-07 00:16:46 -08001625 }
Alan Cox9d6d1622008-04-30 00:53:20 -07001626 }
Jiri Slaby72800df2008-07-25 01:48:20 -07001627 if (copy_to_user(argp, me, sizeof(*me)))
1628 ret = -EFAULT;
1629 kfree(me);
1630 return ret;
Alan Cox9d6d1622008-04-30 00:53:20 -07001631 }
1632 default:
Jiri Slaby1c456072008-02-07 00:16:46 -08001633 return -ENOIOCTLCMD;
1634 }
1635 return 0;
1636}
1637
1638static int mxser_cflags_changed(struct mxser_port *info, unsigned long arg,
1639 struct async_icount *cprev)
1640{
1641 struct async_icount cnow;
1642 unsigned long flags;
1643 int ret;
1644
1645 spin_lock_irqsave(&info->slock, flags);
1646 cnow = info->icount; /* atomic copy */
1647 spin_unlock_irqrestore(&info->slock, flags);
1648
1649 ret = ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
1650 ((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
1651 ((arg & TIOCM_CD) && (cnow.dcd != cprev->dcd)) ||
1652 ((arg & TIOCM_CTS) && (cnow.cts != cprev->cts));
1653
1654 *cprev = cnow;
1655
1656 return ret;
1657}
1658
Alan Cox6caa76b2011-02-14 16:27:22 +00001659static int mxser_ioctl(struct tty_struct *tty,
Jiri Slaby1c456072008-02-07 00:16:46 -08001660 unsigned int cmd, unsigned long arg)
1661{
1662 struct mxser_port *info = tty->driver_data;
Alan Cox07f86c02009-11-30 13:17:41 +00001663 struct tty_port *port = &info->port;
Jiri Slaby1c456072008-02-07 00:16:46 -08001664 struct async_icount cnow;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001665 unsigned long flags;
1666 void __user *argp = (void __user *)arg;
Jiri Slaby1c456072008-02-07 00:16:46 -08001667 int retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001668
1669 if (tty->index == MXSER_PORTS)
Jesper Juhl8ea2c2e2006-06-25 05:47:54 -07001670 return mxser_ioctl_special(cmd, argp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001671
Linus Torvalds1da177e2005-04-16 15:20:36 -07001672 if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
Jiri Slaby1c456072008-02-07 00:16:46 -08001673 int p;
1674 unsigned long opmode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001675 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1676 int shiftbit;
1677 unsigned char val, mask;
1678
Matwey V. Kornilove037f952013-05-22 11:13:38 +04001679 if (info->board->chip_flag != MOXA_MUST_MU860_HWID)
1680 return -EFAULT;
1681
Jiri Slaby1c456072008-02-07 00:16:46 -08001682 p = tty->index % 4;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001683 if (cmd == MOXA_SET_OP_MODE) {
1684 if (get_user(opmode, (int __user *) argp))
1685 return -EFAULT;
Jesper Juhl8ea2c2e2006-06-25 05:47:54 -07001686 if (opmode != RS232_MODE &&
1687 opmode != RS485_2WIRE_MODE &&
1688 opmode != RS422_MODE &&
1689 opmode != RS485_4WIRE_MODE)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001690 return -EFAULT;
1691 mask = ModeMask[p];
1692 shiftbit = p * 2;
Alan Cox07f86c02009-11-30 13:17:41 +00001693 spin_lock_irq(&info->slock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001694 val = inb(info->opmode_ioaddr);
1695 val &= mask;
1696 val |= (opmode << shiftbit);
1697 outb(val, info->opmode_ioaddr);
Alan Cox07f86c02009-11-30 13:17:41 +00001698 spin_unlock_irq(&info->slock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001699 } else {
1700 shiftbit = p * 2;
Alan Cox07f86c02009-11-30 13:17:41 +00001701 spin_lock_irq(&info->slock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001702 opmode = inb(info->opmode_ioaddr) >> shiftbit;
Alan Cox07f86c02009-11-30 13:17:41 +00001703 spin_unlock_irq(&info->slock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001704 opmode &= OP_MODE_MASK;
Jiri Slaby1c456072008-02-07 00:16:46 -08001705 if (put_user(opmode, (int __user *)argp))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001706 return -EFAULT;
1707 }
1708 return 0;
1709 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001710
Peter Hurley18900ca2016-04-09 17:06:48 -07001711 if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT && tty_io_error(tty))
Jiri Slaby1c456072008-02-07 00:16:46 -08001712 return -EIO;
1713
Linus Torvalds1da177e2005-04-16 15:20:36 -07001714 switch (cmd) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001715 case TIOCGSERIAL:
Alan Cox07f86c02009-11-30 13:17:41 +00001716 mutex_lock(&port->mutex);
Alan Cox216ba022008-10-13 10:40:19 +01001717 retval = mxser_get_serial_info(tty, argp);
Alan Cox07f86c02009-11-30 13:17:41 +00001718 mutex_unlock(&port->mutex);
Alan Cox9d6d1622008-04-30 00:53:20 -07001719 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001720 case TIOCSSERIAL:
Alan Cox07f86c02009-11-30 13:17:41 +00001721 mutex_lock(&port->mutex);
Alan Cox216ba022008-10-13 10:40:19 +01001722 retval = mxser_set_serial_info(tty, argp);
Alan Cox07f86c02009-11-30 13:17:41 +00001723 mutex_unlock(&port->mutex);
Alan Cox9d6d1622008-04-30 00:53:20 -07001724 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001725 case TIOCSERGETLSR: /* Get line status register */
Alan Cox9d6d1622008-04-30 00:53:20 -07001726 return mxser_get_lsr_info(info, argp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001727 /*
1728 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1729 * - mask passed in arg for lines of interest
1730 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1731 * Caller should use TIOCGICOUNT to see which one it was
1732 */
Jiri Slabyfc838152007-04-23 14:41:04 -07001733 case TIOCMIWAIT:
1734 spin_lock_irqsave(&info->slock, flags);
1735 cnow = info->icount; /* note the counters on entry */
1736 spin_unlock_irqrestore(&info->slock, flags);
1737
Alan Coxbdc04e32009-09-19 13:13:31 -07001738 return wait_event_interruptible(info->port.delta_msr_wait,
Jiri Slaby1c456072008-02-07 00:16:46 -08001739 mxser_cflags_changed(info, arg, &cnow));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001740 case MOXA_HighSpeedOn:
Jesper Juhl8ea2c2e2006-06-25 05:47:54 -07001741 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
Jiri Slaby1c456072008-02-07 00:16:46 -08001742 case MOXA_SDS_RSTICOUNTER:
Alan Cox07f86c02009-11-30 13:17:41 +00001743 spin_lock_irq(&info->slock);
Jiri Slaby1c456072008-02-07 00:16:46 -08001744 info->mon_data.rxcnt = 0;
1745 info->mon_data.txcnt = 0;
Alan Cox07f86c02009-11-30 13:17:41 +00001746 spin_unlock_irq(&info->slock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001747 return 0;
1748
1749 case MOXA_ASPP_OQUEUE:{
Jiri Slaby1c456072008-02-07 00:16:46 -08001750 int len, lsr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001751
Jiri Slaby1c456072008-02-07 00:16:46 -08001752 len = mxser_chars_in_buffer(tty);
Dan Carpenterc6eb69a2010-04-06 14:34:50 -07001753 spin_lock_irq(&info->slock);
Jiri Slabya75b7b62009-09-10 12:20:08 +02001754 lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_THRE;
Alan Cox07f86c02009-11-30 13:17:41 +00001755 spin_unlock_irq(&info->slock);
Jiri Slaby1c456072008-02-07 00:16:46 -08001756 len += (lsr ? 0 : 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001757
Jiri Slaby1c456072008-02-07 00:16:46 -08001758 return put_user(len, (int __user *)argp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001759 }
Jiri Slaby1c456072008-02-07 00:16:46 -08001760 case MOXA_ASPP_MON: {
1761 int mcr, status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001762
Dan Carpenterc6eb69a2010-04-06 14:34:50 -07001763 spin_lock_irq(&info->slock);
Jiri Slaby1c456072008-02-07 00:16:46 -08001764 status = mxser_get_msr(info->ioaddr, 1, tty->index);
Alan Cox216ba022008-10-13 10:40:19 +01001765 mxser_check_modem_status(tty, info, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001766
Jiri Slaby1c456072008-02-07 00:16:46 -08001767 mcr = inb(info->ioaddr + UART_MCR);
Dan Carpenterc6eb69a2010-04-06 14:34:50 -07001768 spin_unlock_irq(&info->slock);
Alan Cox07f86c02009-11-30 13:17:41 +00001769
Jiri Slaby1c456072008-02-07 00:16:46 -08001770 if (mcr & MOXA_MUST_MCR_XON_FLAG)
1771 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1772 else
1773 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001774
Jiri Slaby1c456072008-02-07 00:16:46 -08001775 if (mcr & MOXA_MUST_MCR_TX_XON)
1776 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1777 else
1778 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1779
Alan Cox216ba022008-10-13 10:40:19 +01001780 if (tty->hw_stopped)
Jiri Slaby1c456072008-02-07 00:16:46 -08001781 info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1782 else
1783 info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
Alan Cox07f86c02009-11-30 13:17:41 +00001784
Jiri Slaby1c456072008-02-07 00:16:46 -08001785 if (copy_to_user(argp, &info->mon_data,
1786 sizeof(struct mxser_mon)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001787 return -EFAULT;
Jiri Slaby1c456072008-02-07 00:16:46 -08001788
Linus Torvalds1da177e2005-04-16 15:20:36 -07001789 return 0;
Jiri Slaby1c456072008-02-07 00:16:46 -08001790 }
1791 case MOXA_ASPP_LSTATUS: {
1792 if (put_user(info->err_shadow, (unsigned char __user *)argp))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001793 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001794
Jiri Slaby1c456072008-02-07 00:16:46 -08001795 info->err_shadow = 0;
1796 return 0;
1797 }
1798 case MOXA_SET_BAUD_METHOD: {
1799 int method;
1800
1801 if (get_user(method, (int __user *)argp))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001802 return -EFAULT;
Jiri Slaby1c456072008-02-07 00:16:46 -08001803 mxser_set_baud_method[tty->index] = method;
1804 return put_user(method, (int __user *)argp);
1805 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001806 default:
1807 return -ENOIOCTLCMD;
1808 }
1809 return 0;
1810}
1811
Alan Cox05871022010-09-16 18:21:52 +01001812 /*
1813 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1814 * Return: write counters to the user passed counter struct
1815 * NB: both 1->0 and 0->1 transitions are counted except for
1816 * RI where only 0->1 is counted.
1817 */
1818
1819static int mxser_get_icount(struct tty_struct *tty,
1820 struct serial_icounter_struct *icount)
1821
1822{
1823 struct mxser_port *info = tty->driver_data;
1824 struct async_icount cnow;
1825 unsigned long flags;
1826
1827 spin_lock_irqsave(&info->slock, flags);
1828 cnow = info->icount;
1829 spin_unlock_irqrestore(&info->slock, flags);
1830
1831 icount->frame = cnow.frame;
1832 icount->brk = cnow.brk;
1833 icount->overrun = cnow.overrun;
1834 icount->buf_overrun = cnow.buf_overrun;
1835 icount->parity = cnow.parity;
1836 icount->rx = cnow.rx;
1837 icount->tx = cnow.tx;
1838 icount->cts = cnow.cts;
1839 icount->dsr = cnow.dsr;
1840 icount->rng = cnow.rng;
1841 icount->dcd = cnow.dcd;
1842 return 0;
1843}
1844
Linus Torvalds1da177e2005-04-16 15:20:36 -07001845static void mxser_stoprx(struct tty_struct *tty)
1846{
Jiri Slaby1c456072008-02-07 00:16:46 -08001847 struct mxser_port *info = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001848
1849 info->ldisc_stop_rx = 1;
1850 if (I_IXOFF(tty)) {
Jiri Slaby1c456072008-02-07 00:16:46 -08001851 if (info->board->chip_flag) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001852 info->IER &= ~MOXA_MUST_RECV_ISR;
Jiri Slaby1c456072008-02-07 00:16:46 -08001853 outb(info->IER, info->ioaddr + UART_IER);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001854 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001855 info->x_char = STOP_CHAR(tty);
Jiri Slaby1c456072008-02-07 00:16:46 -08001856 outb(0, info->ioaddr + UART_IER);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001857 info->IER |= UART_IER_THRI;
Jiri Slaby1c456072008-02-07 00:16:46 -08001858 outb(info->IER, info->ioaddr + UART_IER);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001859 }
1860 }
1861
Peter Hurley9db276f2016-01-10 20:36:15 -08001862 if (C_CRTSCTS(tty)) {
Jiri Slaby1c456072008-02-07 00:16:46 -08001863 info->MCR &= ~UART_MCR_RTS;
1864 outb(info->MCR, info->ioaddr + UART_MCR);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001865 }
1866}
1867
1868/*
1869 * This routine is called by the upper-layer tty layer to signal that
1870 * incoming characters should be throttled.
1871 */
1872static void mxser_throttle(struct tty_struct *tty)
1873{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001874 mxser_stoprx(tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001875}
1876
1877static void mxser_unthrottle(struct tty_struct *tty)
1878{
Jiri Slaby1c456072008-02-07 00:16:46 -08001879 struct mxser_port *info = tty->driver_data;
Jesper Juhl8ea2c2e2006-06-25 05:47:54 -07001880
Jiri Slaby1c456072008-02-07 00:16:46 -08001881 /* startrx */
1882 info->ldisc_stop_rx = 0;
1883 if (I_IXOFF(tty)) {
1884 if (info->x_char)
1885 info->x_char = 0;
1886 else {
1887 if (info->board->chip_flag) {
1888 info->IER |= MOXA_MUST_RECV_ISR;
1889 outb(info->IER, info->ioaddr + UART_IER);
1890 } else {
1891 info->x_char = START_CHAR(tty);
1892 outb(0, info->ioaddr + UART_IER);
1893 info->IER |= UART_IER_THRI;
1894 outb(info->IER, info->ioaddr + UART_IER);
1895 }
1896 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001897 }
1898
Peter Hurley9db276f2016-01-10 20:36:15 -08001899 if (C_CRTSCTS(tty)) {
Jiri Slaby1c456072008-02-07 00:16:46 -08001900 info->MCR |= UART_MCR_RTS;
1901 outb(info->MCR, info->ioaddr + UART_MCR);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001902 }
1903}
1904
1905/*
1906 * mxser_stop() and mxser_start()
1907 *
1908 * This routines are called before setting or resetting tty->stopped.
1909 * They enable or disable transmitter interrupts, as necessary.
1910 */
1911static void mxser_stop(struct tty_struct *tty)
1912{
Jiri Slaby1c456072008-02-07 00:16:46 -08001913 struct mxser_port *info = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001914 unsigned long flags;
1915
1916 spin_lock_irqsave(&info->slock, flags);
1917 if (info->IER & UART_IER_THRI) {
1918 info->IER &= ~UART_IER_THRI;
Jiri Slaby1c456072008-02-07 00:16:46 -08001919 outb(info->IER, info->ioaddr + UART_IER);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001920 }
1921 spin_unlock_irqrestore(&info->slock, flags);
1922}
1923
1924static void mxser_start(struct tty_struct *tty)
1925{
Jiri Slaby1c456072008-02-07 00:16:46 -08001926 struct mxser_port *info = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001927 unsigned long flags;
1928
1929 spin_lock_irqsave(&info->slock, flags);
Alan Cox0ad9e7d2008-07-16 21:56:10 +01001930 if (info->xmit_cnt && info->port.xmit_buf) {
Jiri Slaby1c456072008-02-07 00:16:46 -08001931 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001932 info->IER |= UART_IER_THRI;
Jiri Slaby1c456072008-02-07 00:16:46 -08001933 outb(info->IER, info->ioaddr + UART_IER);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001934 }
1935 spin_unlock_irqrestore(&info->slock, flags);
1936}
1937
Jiri Slaby1c456072008-02-07 00:16:46 -08001938static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1939{
1940 struct mxser_port *info = tty->driver_data;
1941 unsigned long flags;
1942
1943 spin_lock_irqsave(&info->slock, flags);
Alan Cox216ba022008-10-13 10:40:19 +01001944 mxser_change_speed(tty, old_termios);
Jiri Slaby1c456072008-02-07 00:16:46 -08001945 spin_unlock_irqrestore(&info->slock, flags);
1946
Peter Hurley9db276f2016-01-10 20:36:15 -08001947 if ((old_termios->c_cflag & CRTSCTS) && !C_CRTSCTS(tty)) {
Jiri Slaby1c456072008-02-07 00:16:46 -08001948 tty->hw_stopped = 0;
1949 mxser_start(tty);
1950 }
1951
1952 /* Handle sw stopped */
Peter Hurley9db276f2016-01-10 20:36:15 -08001953 if ((old_termios->c_iflag & IXON) && !I_IXON(tty)) {
Jiri Slaby1c456072008-02-07 00:16:46 -08001954 tty->stopped = 0;
1955
1956 if (info->board->chip_flag) {
1957 spin_lock_irqsave(&info->slock, flags);
Christoph Hellwig148ff862008-04-30 00:54:29 -07001958 mxser_disable_must_rx_software_flow_control(
1959 info->ioaddr);
Jiri Slaby1c456072008-02-07 00:16:46 -08001960 spin_unlock_irqrestore(&info->slock, flags);
1961 }
1962
1963 mxser_start(tty);
1964 }
1965}
1966
Linus Torvalds1da177e2005-04-16 15:20:36 -07001967/*
1968 * mxser_wait_until_sent() --- wait until the transmitter is empty
1969 */
1970static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
1971{
Jiri Slaby1c456072008-02-07 00:16:46 -08001972 struct mxser_port *info = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001973 unsigned long orig_jiffies, char_time;
Alan Cox07f86c02009-11-30 13:17:41 +00001974 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001975 int lsr;
1976
1977 if (info->type == PORT_UNKNOWN)
1978 return;
1979
1980 if (info->xmit_fifo_size == 0)
1981 return; /* Just in case.... */
1982
1983 orig_jiffies = jiffies;
1984 /*
1985 * Set the check interval to be 1/5 of the estimated time to
1986 * send a single character, and make it at least 1. The check
1987 * interval should also be less than the timeout.
1988 *
1989 * Note: we have to use pretty tight timings here to satisfy
1990 * the NIST-PCTS.
1991 */
1992 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
1993 char_time = char_time / 5;
1994 if (char_time == 0)
1995 char_time = 1;
1996 if (timeout && timeout < char_time)
1997 char_time = timeout;
1998 /*
1999 * If the transmitter hasn't cleared in twice the approximate
2000 * amount of time to send the entire FIFO, it probably won't
2001 * ever clear. This assumes the UART isn't doing flow
2002 * control, which is currently the case. Hence, if it ever
2003 * takes longer than info->timeout, this is probably due to a
2004 * UART bug of some kind. So, we clamp the timeout parameter at
2005 * 2*info->timeout.
2006 */
2007 if (!timeout || timeout > 2 * info->timeout)
2008 timeout = 2 * info->timeout;
Jiri Slaby8bab5342011-07-14 14:35:15 +02002009
Alan Cox07f86c02009-11-30 13:17:41 +00002010 spin_lock_irqsave(&info->slock, flags);
Jiri Slaby1c456072008-02-07 00:16:46 -08002011 while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) {
Alan Cox07f86c02009-11-30 13:17:41 +00002012 spin_unlock_irqrestore(&info->slock, flags);
Nishanth Aravamudanda4cd8d2005-09-10 00:27:30 -07002013 schedule_timeout_interruptible(char_time);
Alan Cox07f86c02009-11-30 13:17:41 +00002014 spin_lock_irqsave(&info->slock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002015 if (signal_pending(current))
2016 break;
2017 if (timeout && time_after(jiffies, orig_jiffies + timeout))
2018 break;
2019 }
Alan Cox07f86c02009-11-30 13:17:41 +00002020 spin_unlock_irqrestore(&info->slock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002021 set_current_state(TASK_RUNNING);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002022}
2023
Linus Torvalds1da177e2005-04-16 15:20:36 -07002024/*
2025 * This routine is called by tty_hangup() when a hangup is signaled.
2026 */
Jiri Slaby1c456072008-02-07 00:16:46 -08002027static void mxser_hangup(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002028{
Jiri Slaby1c456072008-02-07 00:16:46 -08002029 struct mxser_port *info = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002030
2031 mxser_flush_buffer(tty);
Alan Cox3b6826b2009-01-02 13:45:58 +00002032 tty_port_hangup(&info->port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002033}
2034
Linus Torvalds1da177e2005-04-16 15:20:36 -07002035/*
2036 * mxser_rs_break() --- routine which turns the break handling on or off
2037 */
Alan Cox9e989662008-07-22 11:18:03 +01002038static int mxser_rs_break(struct tty_struct *tty, int break_state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002039{
Jiri Slaby1c456072008-02-07 00:16:46 -08002040 struct mxser_port *info = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002041 unsigned long flags;
2042
2043 spin_lock_irqsave(&info->slock, flags);
2044 if (break_state == -1)
Jiri Slaby1c456072008-02-07 00:16:46 -08002045 outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
2046 info->ioaddr + UART_LCR);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002047 else
Jiri Slaby1c456072008-02-07 00:16:46 -08002048 outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
2049 info->ioaddr + UART_LCR);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002050 spin_unlock_irqrestore(&info->slock, flags);
Alan Cox9e989662008-07-22 11:18:03 +01002051 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002052}
2053
Alan Cox216ba022008-10-13 10:40:19 +01002054static void mxser_receive_chars(struct tty_struct *tty,
2055 struct mxser_port *port, int *status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002056{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002057 unsigned char ch, gdl;
2058 int ignored = 0;
2059 int cnt = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002060 int recv_room;
2061 int max = 256;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002062
Alan Cox33f0f882006-01-09 20:54:13 -08002063 recv_room = tty->receive_room;
Alan Cox216ba022008-10-13 10:40:19 +01002064 if (recv_room == 0 && !port->ldisc_stop_rx)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002065 mxser_stoprx(tty);
Jiri Slaby1c456072008-02-07 00:16:46 -08002066 if (port->board->chip_flag != MOXA_OTHER_UART) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002067
Jiri Slaby1c456072008-02-07 00:16:46 -08002068 if (*status & UART_LSR_SPECIAL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002069 goto intr_old;
Jiri Slaby1c456072008-02-07 00:16:46 -08002070 if (port->board->chip_flag == MOXA_MUST_MU860_HWID &&
Jesper Juhl8ea2c2e2006-06-25 05:47:54 -07002071 (*status & MOXA_MUST_LSR_RERR))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002072 goto intr_old;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002073 if (*status & MOXA_MUST_LSR_RERR)
2074 goto intr_old;
2075
Jiri Slaby1c456072008-02-07 00:16:46 -08002076 gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002077
Jiri Slaby1c456072008-02-07 00:16:46 -08002078 if (port->board->chip_flag == MOXA_MUST_MU150_HWID)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002079 gdl &= MOXA_MUST_GDL_MASK;
2080 if (gdl >= recv_room) {
Jiri Slaby1c456072008-02-07 00:16:46 -08002081 if (!port->ldisc_stop_rx)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002082 mxser_stoprx(tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002083 }
2084 while (gdl--) {
Jiri Slaby1c456072008-02-07 00:16:46 -08002085 ch = inb(port->ioaddr + UART_RX);
Jiri Slaby92a19f92013-01-03 15:53:03 +01002086 tty_insert_flip_char(&port->port, ch, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002087 cnt++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002088 }
2089 goto end_intr;
2090 }
Jiri Slaby1c456072008-02-07 00:16:46 -08002091intr_old:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002092
2093 do {
2094 if (max-- < 0)
2095 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002096
Jiri Slaby1c456072008-02-07 00:16:46 -08002097 ch = inb(port->ioaddr + UART_RX);
2098 if (port->board->chip_flag && (*status & UART_LSR_OE))
2099 outb(0x23, port->ioaddr + UART_FCR);
2100 *status &= port->read_status_mask;
2101 if (*status & port->ignore_status_mask) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002102 if (++ignored > 100)
2103 break;
2104 } else {
Denis Vlasenko3399ba52005-06-06 13:35:55 -07002105 char flag = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002106 if (*status & UART_LSR_SPECIAL) {
2107 if (*status & UART_LSR_BI) {
Denis Vlasenko3399ba52005-06-06 13:35:55 -07002108 flag = TTY_BREAK;
Jiri Slaby1c456072008-02-07 00:16:46 -08002109 port->icount.brk++;
2110
Alan Cox0ad9e7d2008-07-16 21:56:10 +01002111 if (port->port.flags & ASYNC_SAK)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002112 do_SAK(tty);
2113 } else if (*status & UART_LSR_PE) {
Denis Vlasenko3399ba52005-06-06 13:35:55 -07002114 flag = TTY_PARITY;
Jiri Slaby1c456072008-02-07 00:16:46 -08002115 port->icount.parity++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002116 } else if (*status & UART_LSR_FE) {
Denis Vlasenko3399ba52005-06-06 13:35:55 -07002117 flag = TTY_FRAME;
Jiri Slaby1c456072008-02-07 00:16:46 -08002118 port->icount.frame++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002119 } else if (*status & UART_LSR_OE) {
Denis Vlasenko3399ba52005-06-06 13:35:55 -07002120 flag = TTY_OVERRUN;
Jiri Slaby1c456072008-02-07 00:16:46 -08002121 port->icount.overrun++;
2122 } else
2123 flag = TTY_BREAK;
Denis Vlasenko3399ba52005-06-06 13:35:55 -07002124 }
Jiri Slaby92a19f92013-01-03 15:53:03 +01002125 tty_insert_flip_char(&port->port, ch, flag);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002126 cnt++;
2127 if (cnt >= recv_room) {
Jiri Slaby1c456072008-02-07 00:16:46 -08002128 if (!port->ldisc_stop_rx)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002129 mxser_stoprx(tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002130 break;
2131 }
2132
2133 }
2134
Jiri Slaby1c456072008-02-07 00:16:46 -08002135 if (port->board->chip_flag)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002136 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002137
Jiri Slaby1c456072008-02-07 00:16:46 -08002138 *status = inb(port->ioaddr + UART_LSR);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002139 } while (*status & UART_LSR_DR);
2140
Jiri Slaby1c456072008-02-07 00:16:46 -08002141end_intr:
Alan Cox216ba022008-10-13 10:40:19 +01002142 mxvar_log.rxcnt[tty->index] += cnt;
Jiri Slaby1c456072008-02-07 00:16:46 -08002143 port->mon_data.rxcnt += cnt;
2144 port->mon_data.up_rxcnt += cnt;
Denis Vlasenko3399ba52005-06-06 13:35:55 -07002145
Jiri Slaby1c456072008-02-07 00:16:46 -08002146 /*
2147 * We are called from an interrupt context with &port->slock
2148 * being held. Drop it temporarily in order to prevent
2149 * recursive locking.
2150 */
2151 spin_unlock(&port->slock);
Jiri Slaby2e124b42013-01-03 15:53:06 +01002152 tty_flip_buffer_push(&port->port);
Jiri Slaby1c456072008-02-07 00:16:46 -08002153 spin_lock(&port->slock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002154}
2155
Alan Cox216ba022008-10-13 10:40:19 +01002156static void mxser_transmit_chars(struct tty_struct *tty, struct mxser_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002157{
2158 int count, cnt;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002159
Jiri Slaby1c456072008-02-07 00:16:46 -08002160 if (port->x_char) {
2161 outb(port->x_char, port->ioaddr + UART_TX);
2162 port->x_char = 0;
Alan Cox216ba022008-10-13 10:40:19 +01002163 mxvar_log.txcnt[tty->index]++;
Jiri Slaby1c456072008-02-07 00:16:46 -08002164 port->mon_data.txcnt++;
2165 port->mon_data.up_txcnt++;
2166 port->icount.tx++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002167 return;
2168 }
2169
Alan Cox0ad9e7d2008-07-16 21:56:10 +01002170 if (port->port.xmit_buf == NULL)
Jiri Slaby1c456072008-02-07 00:16:46 -08002171 return;
2172
Alan Cox216ba022008-10-13 10:40:19 +01002173 if (port->xmit_cnt <= 0 || tty->stopped ||
2174 (tty->hw_stopped &&
Jiri Slaby1c456072008-02-07 00:16:46 -08002175 (port->type != PORT_16550A) &&
2176 (!port->board->chip_flag))) {
2177 port->IER &= ~UART_IER_THRI;
2178 outb(port->IER, port->ioaddr + UART_IER);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002179 return;
2180 }
2181
Jiri Slaby1c456072008-02-07 00:16:46 -08002182 cnt = port->xmit_cnt;
2183 count = port->xmit_fifo_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002184 do {
Alan Cox0ad9e7d2008-07-16 21:56:10 +01002185 outb(port->port.xmit_buf[port->xmit_tail++],
Jiri Slaby1c456072008-02-07 00:16:46 -08002186 port->ioaddr + UART_TX);
2187 port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2188 if (--port->xmit_cnt <= 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002189 break;
2190 } while (--count > 0);
Alan Cox216ba022008-10-13 10:40:19 +01002191 mxvar_log.txcnt[tty->index] += (cnt - port->xmit_cnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002192
Jiri Slaby1c456072008-02-07 00:16:46 -08002193 port->mon_data.txcnt += (cnt - port->xmit_cnt);
2194 port->mon_data.up_txcnt += (cnt - port->xmit_cnt);
2195 port->icount.tx += (cnt - port->xmit_cnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002196
Kulikov Vasiliy464eb8f2010-07-23 20:34:53 +04002197 if (port->xmit_cnt < WAKEUP_CHARS)
Alan Cox216ba022008-10-13 10:40:19 +01002198 tty_wakeup(tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002199
Jiri Slaby1c456072008-02-07 00:16:46 -08002200 if (port->xmit_cnt <= 0) {
2201 port->IER &= ~UART_IER_THRI;
2202 outb(port->IER, port->ioaddr + UART_IER);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002203 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002204}
2205
2206/*
Jiri Slaby1c456072008-02-07 00:16:46 -08002207 * This is the serial driver's generic interrupt routine
Linus Torvalds1da177e2005-04-16 15:20:36 -07002208 */
Jiri Slaby1c456072008-02-07 00:16:46 -08002209static irqreturn_t mxser_interrupt(int irq, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002210{
Jiri Slaby1c456072008-02-07 00:16:46 -08002211 int status, iir, i;
2212 struct mxser_board *brd = NULL;
2213 struct mxser_port *port;
2214 int max, irqbits, bits, msr;
2215 unsigned int int_cnt, pass_counter = 0;
2216 int handled = IRQ_NONE;
Alan Cox216ba022008-10-13 10:40:19 +01002217 struct tty_struct *tty;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002218
Jiri Slaby1c456072008-02-07 00:16:46 -08002219 for (i = 0; i < MXSER_BOARDS; i++)
2220 if (dev_id == &mxser_boards[i]) {
2221 brd = dev_id;
2222 break;
2223 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002224
Jiri Slaby1c456072008-02-07 00:16:46 -08002225 if (i == MXSER_BOARDS)
2226 goto irq_stop;
2227 if (brd == NULL)
2228 goto irq_stop;
2229 max = brd->info->nports;
2230 while (pass_counter++ < MXSER_ISR_PASS_LIMIT) {
2231 irqbits = inb(brd->vector) & brd->vector_mask;
2232 if (irqbits == brd->vector_mask)
2233 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002234
Jiri Slaby1c456072008-02-07 00:16:46 -08002235 handled = IRQ_HANDLED;
2236 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
2237 if (irqbits == brd->vector_mask)
2238 break;
2239 if (bits & irqbits)
2240 continue;
2241 port = &brd->ports[i];
Linus Torvalds1da177e2005-04-16 15:20:36 -07002242
Jiri Slaby1c456072008-02-07 00:16:46 -08002243 int_cnt = 0;
2244 spin_lock(&port->slock);
2245 do {
2246 iir = inb(port->ioaddr + UART_IIR);
2247 if (iir & UART_IIR_NO_INT)
2248 break;
2249 iir &= MOXA_MUST_IIR_MASK;
Alan Cox216ba022008-10-13 10:40:19 +01002250 tty = tty_port_tty_get(&port->port);
Peter Hurleycd7b4b32016-01-10 14:51:38 -08002251 if (!tty || port->closing ||
Peter Hurleyd41861c2016-04-09 17:53:25 -07002252 !tty_port_initialized(&port->port)) {
Jiri Slaby1c456072008-02-07 00:16:46 -08002253 status = inb(port->ioaddr + UART_LSR);
2254 outb(0x27, port->ioaddr + UART_FCR);
2255 inb(port->ioaddr + UART_MSR);
Alan Cox216ba022008-10-13 10:40:19 +01002256 tty_kref_put(tty);
Jiri Slaby1c456072008-02-07 00:16:46 -08002257 break;
2258 }
2259
2260 status = inb(port->ioaddr + UART_LSR);
2261
2262 if (status & UART_LSR_PE)
2263 port->err_shadow |= NPPI_NOTIFY_PARITY;
2264 if (status & UART_LSR_FE)
2265 port->err_shadow |= NPPI_NOTIFY_FRAMING;
2266 if (status & UART_LSR_OE)
2267 port->err_shadow |=
2268 NPPI_NOTIFY_HW_OVERRUN;
2269 if (status & UART_LSR_BI)
2270 port->err_shadow |= NPPI_NOTIFY_BREAK;
2271
2272 if (port->board->chip_flag) {
2273 if (iir == MOXA_MUST_IIR_GDA ||
2274 iir == MOXA_MUST_IIR_RDA ||
2275 iir == MOXA_MUST_IIR_RTO ||
2276 iir == MOXA_MUST_IIR_LSR)
Alan Cox216ba022008-10-13 10:40:19 +01002277 mxser_receive_chars(tty, port,
Jiri Slaby1c456072008-02-07 00:16:46 -08002278 &status);
2279
2280 } else {
2281 status &= port->read_status_mask;
2282 if (status & UART_LSR_DR)
Alan Cox216ba022008-10-13 10:40:19 +01002283 mxser_receive_chars(tty, port,
Jiri Slaby1c456072008-02-07 00:16:46 -08002284 &status);
2285 }
2286 msr = inb(port->ioaddr + UART_MSR);
2287 if (msr & UART_MSR_ANY_DELTA)
Alan Cox216ba022008-10-13 10:40:19 +01002288 mxser_check_modem_status(tty, port, msr);
Jiri Slaby1c456072008-02-07 00:16:46 -08002289
2290 if (port->board->chip_flag) {
2291 if (iir == 0x02 && (status &
2292 UART_LSR_THRE))
Alan Cox216ba022008-10-13 10:40:19 +01002293 mxser_transmit_chars(tty, port);
Jiri Slaby1c456072008-02-07 00:16:46 -08002294 } else {
2295 if (status & UART_LSR_THRE)
Alan Cox216ba022008-10-13 10:40:19 +01002296 mxser_transmit_chars(tty, port);
Jiri Slaby1c456072008-02-07 00:16:46 -08002297 }
Alan Cox216ba022008-10-13 10:40:19 +01002298 tty_kref_put(tty);
Jiri Slaby1c456072008-02-07 00:16:46 -08002299 } while (int_cnt++ < MXSER_ISR_PASS_LIMIT);
2300 spin_unlock(&port->slock);
2301 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002302 }
2303
Jiri Slaby1c456072008-02-07 00:16:46 -08002304irq_stop:
2305 return handled;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002306}
2307
Jiri Slaby1c456072008-02-07 00:16:46 -08002308static const struct tty_operations mxser_ops = {
2309 .open = mxser_open,
2310 .close = mxser_close,
2311 .write = mxser_write,
2312 .put_char = mxser_put_char,
2313 .flush_chars = mxser_flush_chars,
2314 .write_room = mxser_write_room,
2315 .chars_in_buffer = mxser_chars_in_buffer,
2316 .flush_buffer = mxser_flush_buffer,
2317 .ioctl = mxser_ioctl,
2318 .throttle = mxser_throttle,
2319 .unthrottle = mxser_unthrottle,
2320 .set_termios = mxser_set_termios,
2321 .stop = mxser_stop,
2322 .start = mxser_start,
2323 .hangup = mxser_hangup,
2324 .break_ctl = mxser_rs_break,
2325 .wait_until_sent = mxser_wait_until_sent,
2326 .tiocmget = mxser_tiocmget,
2327 .tiocmset = mxser_tiocmset,
Alan Cox05871022010-09-16 18:21:52 +01002328 .get_icount = mxser_get_icount,
Jiri Slaby1c456072008-02-07 00:16:46 -08002329};
2330
Aya Mahfouz04b757d2015-12-15 01:53:36 +02002331static const struct tty_port_operations mxser_port_ops = {
Alan Cox31f35932009-01-02 13:45:05 +00002332 .carrier_raised = mxser_carrier_raised,
Alan Coxfcc8ac12009-06-11 12:24:17 +01002333 .dtr_rts = mxser_dtr_rts,
Alan Cox67691402009-11-30 13:17:35 +00002334 .activate = mxser_activate,
2335 .shutdown = mxser_shutdown_port,
Alan Cox31f35932009-01-02 13:45:05 +00002336};
2337
Linus Torvalds1da177e2005-04-16 15:20:36 -07002338/*
Jiri Slaby1c456072008-02-07 00:16:46 -08002339 * The MOXA Smartio/Industio serial driver boot-time initialization code!
Linus Torvalds1da177e2005-04-16 15:20:36 -07002340 */
Jiri Slaby1c456072008-02-07 00:16:46 -08002341
Jiri Slaby38daf882012-08-07 21:47:37 +02002342static bool allow_overlapping_vector;
Jiri Slabya342ca12012-08-13 10:18:09 +02002343module_param(allow_overlapping_vector, bool, S_IRUGO);
Jiri Slaby38daf882012-08-07 21:47:37 +02002344MODULE_PARM_DESC(allow_overlapping_vector, "whether we allow ISA cards to be configured such that vector overlabs IO ports (default=no)");
2345
2346static bool mxser_overlapping_vector(struct mxser_board *brd)
2347{
2348 return allow_overlapping_vector &&
2349 brd->vector >= brd->ports[0].ioaddr &&
2350 brd->vector < brd->ports[0].ioaddr + 8 * brd->info->nports;
2351}
2352
2353static int mxser_request_vector(struct mxser_board *brd)
2354{
2355 if (mxser_overlapping_vector(brd))
2356 return 0;
2357 return request_region(brd->vector, 1, "mxser(vector)") ? 0 : -EIO;
2358}
2359
2360static void mxser_release_vector(struct mxser_board *brd)
2361{
2362 if (mxser_overlapping_vector(brd))
2363 return;
2364 release_region(brd->vector, 1);
2365}
2366
Jiri Slabydf480512010-09-03 10:31:37 +02002367static void mxser_release_ISA_res(struct mxser_board *brd)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002368{
Jiri Slabydf480512010-09-03 10:31:37 +02002369 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
Jiri Slaby38daf882012-08-07 21:47:37 +02002370 mxser_release_vector(brd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002371}
2372
Bill Pemberton9671f092012-11-19 13:21:50 -05002373static int mxser_initbrd(struct mxser_board *brd,
Jiri Slaby1c456072008-02-07 00:16:46 -08002374 struct pci_dev *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002375{
Jiri Slaby1c456072008-02-07 00:16:46 -08002376 struct mxser_port *info;
2377 unsigned int i;
2378 int retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002379
Jiri Slaby83766bc2008-07-25 01:48:21 -07002380 printk(KERN_INFO "mxser: max. baud rate = %d bps\n",
2381 brd->ports[0].max_baud);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002382
Jiri Slaby1c456072008-02-07 00:16:46 -08002383 for (i = 0; i < brd->info->nports; i++) {
2384 info = &brd->ports[i];
Alan Cox44b7d1b2008-07-16 21:57:18 +01002385 tty_port_init(&info->port);
Alan Cox31f35932009-01-02 13:45:05 +00002386 info->port.ops = &mxser_port_ops;
Jiri Slaby1c456072008-02-07 00:16:46 -08002387 info->board = brd;
2388 info->stop_rx = 0;
2389 info->ldisc_stop_rx = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002390
Jiri Slaby1c456072008-02-07 00:16:46 -08002391 /* Enhance mode enabled here */
2392 if (brd->chip_flag != MOXA_OTHER_UART)
Christoph Hellwig148ff862008-04-30 00:54:29 -07002393 mxser_enable_must_enchance_mode(info->ioaddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002394
Jiri Slaby1c456072008-02-07 00:16:46 -08002395 info->type = brd->uart_type;
2396
2397 process_txrx_fifo(info);
2398
2399 info->custom_divisor = info->baud_base * 16;
Alan Cox44b7d1b2008-07-16 21:57:18 +01002400 info->port.close_delay = 5 * HZ / 10;
2401 info->port.closing_wait = 30 * HZ;
Jiri Slaby1c456072008-02-07 00:16:46 -08002402 info->normal_termios = mxvar_sdriver->init_termios;
Jiri Slaby1c456072008-02-07 00:16:46 -08002403 memset(&info->mon_data, 0, sizeof(struct mxser_mon));
2404 info->err_shadow = 0;
2405 spin_lock_init(&info->slock);
2406
2407 /* before set INT ISR, disable all int */
2408 outb(inb(info->ioaddr + UART_IER) & 0xf0,
2409 info->ioaddr + UART_IER);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002410 }
2411
Jiri Slaby1c456072008-02-07 00:16:46 -08002412 retval = request_irq(brd->irq, mxser_interrupt, IRQF_SHARED, "mxser",
2413 brd);
Jiri Slaby191c5f12012-11-15 09:49:56 +01002414 if (retval) {
2415 for (i = 0; i < brd->info->nports; i++)
2416 tty_port_destroy(&brd->ports[i].port);
Jiri Slaby1c456072008-02-07 00:16:46 -08002417 printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may "
2418 "conflict with another device.\n",
2419 brd->info->name, brd->irq);
Jiri Slaby191c5f12012-11-15 09:49:56 +01002420 }
Jiri Slabydf480512010-09-03 10:31:37 +02002421
Jesper Juhl8ea2c2e2006-06-25 05:47:54 -07002422 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002423}
2424
Jiri Slaby191c5f12012-11-15 09:49:56 +01002425static void mxser_board_remove(struct mxser_board *brd)
2426{
2427 unsigned int i;
2428
2429 for (i = 0; i < brd->info->nports; i++) {
2430 tty_unregister_device(mxvar_sdriver, brd->idx + i);
2431 tty_port_destroy(&brd->ports[i].port);
2432 }
Alexey Khoroshilov9e17df32013-02-17 02:24:37 +04002433 free_irq(brd->irq, brd);
Jiri Slaby191c5f12012-11-15 09:49:56 +01002434}
2435
Jiri Slaby1c456072008-02-07 00:16:46 -08002436static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002437{
Jiri Slaby38daf882012-08-07 21:47:37 +02002438 int id, i, bits, ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002439 unsigned short regs[16], irq;
2440 unsigned char scratch, scratch2;
2441
Jiri Slaby1c456072008-02-07 00:16:46 -08002442 brd->chip_flag = MOXA_OTHER_UART;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002443
2444 id = mxser_read_register(cap, regs);
Jiri Slaby1c456072008-02-07 00:16:46 -08002445 switch (id) {
2446 case C168_ASIC_ID:
2447 brd->info = &mxser_cards[0];
2448 break;
2449 case C104_ASIC_ID:
2450 brd->info = &mxser_cards[1];
2451 break;
2452 case CI104J_ASIC_ID:
2453 brd->info = &mxser_cards[2];
2454 break;
2455 case C102_ASIC_ID:
2456 brd->info = &mxser_cards[5];
2457 break;
2458 case CI132_ASIC_ID:
2459 brd->info = &mxser_cards[6];
2460 break;
2461 case CI134_ASIC_ID:
2462 brd->info = &mxser_cards[7];
2463 break;
2464 default:
Jesper Juhl8ea2c2e2006-06-25 05:47:54 -07002465 return 0;
Jiri Slaby1c456072008-02-07 00:16:46 -08002466 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002467
2468 irq = 0;
Jiri Slaby1c456072008-02-07 00:16:46 -08002469 /* some ISA cards have 2 ports, but we want to see them as 4-port (why?)
2470 Flag-hack checks if configuration should be read as 2-port here. */
2471 if (brd->info->nports == 2 || (brd->info->flags & MXSER_HAS2)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002472 irq = regs[9] & 0xF000;
2473 irq = irq | (irq >> 4);
2474 if (irq != (regs[9] & 0xFF00))
Jiri Slaby83766bc2008-07-25 01:48:21 -07002475 goto err_irqconflict;
Jiri Slaby1c456072008-02-07 00:16:46 -08002476 } else if (brd->info->nports == 4) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002477 irq = regs[9] & 0xF000;
2478 irq = irq | (irq >> 4);
2479 irq = irq | (irq >> 8);
2480 if (irq != regs[9])
Jiri Slaby83766bc2008-07-25 01:48:21 -07002481 goto err_irqconflict;
Jiri Slaby1c456072008-02-07 00:16:46 -08002482 } else if (brd->info->nports == 8) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002483 irq = regs[9] & 0xF000;
2484 irq = irq | (irq >> 4);
2485 irq = irq | (irq >> 8);
2486 if ((irq != regs[9]) || (irq != regs[10]))
Jiri Slaby83766bc2008-07-25 01:48:21 -07002487 goto err_irqconflict;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002488 }
2489
Jiri Slaby83766bc2008-07-25 01:48:21 -07002490 if (!irq) {
2491 printk(KERN_ERR "mxser: interrupt number unset\n");
2492 return -EIO;
2493 }
Jiri Slaby1c456072008-02-07 00:16:46 -08002494 brd->irq = ((int)(irq & 0xF000) >> 12);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002495 for (i = 0; i < 8; i++)
Jiri Slaby1c456072008-02-07 00:16:46 -08002496 brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8;
Jiri Slaby83766bc2008-07-25 01:48:21 -07002497 if ((regs[12] & 0x80) == 0) {
2498 printk(KERN_ERR "mxser: invalid interrupt vector\n");
2499 return -EIO;
2500 }
Jiri Slaby1c456072008-02-07 00:16:46 -08002501 brd->vector = (int)regs[11]; /* interrupt vector */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002502 if (id == 1)
Jiri Slaby1c456072008-02-07 00:16:46 -08002503 brd->vector_mask = 0x00FF;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002504 else
Jiri Slaby1c456072008-02-07 00:16:46 -08002505 brd->vector_mask = 0x000F;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002506 for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
2507 if (regs[12] & bits) {
Jiri Slaby1c456072008-02-07 00:16:46 -08002508 brd->ports[i].baud_base = 921600;
2509 brd->ports[i].max_baud = 921600;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002510 } else {
Jiri Slaby1c456072008-02-07 00:16:46 -08002511 brd->ports[i].baud_base = 115200;
2512 brd->ports[i].max_baud = 115200;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002513 }
2514 }
2515 scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
2516 outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
2517 outb(0, cap + UART_EFR); /* EFR is the same as FCR */
2518 outb(scratch2, cap + UART_LCR);
2519 outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
2520 scratch = inb(cap + UART_IIR);
2521
2522 if (scratch & 0xC0)
Jiri Slaby1c456072008-02-07 00:16:46 -08002523 brd->uart_type = PORT_16550A;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002524 else
Jiri Slaby1c456072008-02-07 00:16:46 -08002525 brd->uart_type = PORT_16450;
2526 if (!request_region(brd->ports[0].ioaddr, 8 * brd->info->nports,
Jiri Slaby83766bc2008-07-25 01:48:21 -07002527 "mxser(IO)")) {
2528 printk(KERN_ERR "mxser: can't request ports I/O region: "
2529 "0x%.8lx-0x%.8lx\n",
2530 brd->ports[0].ioaddr, brd->ports[0].ioaddr +
2531 8 * brd->info->nports - 1);
2532 return -EIO;
2533 }
Jiri Slaby38daf882012-08-07 21:47:37 +02002534
2535 ret = mxser_request_vector(brd);
2536 if (ret) {
Jiri Slaby1c456072008-02-07 00:16:46 -08002537 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
Jiri Slaby83766bc2008-07-25 01:48:21 -07002538 printk(KERN_ERR "mxser: can't request interrupt vector region: "
2539 "0x%.8lx-0x%.8lx\n",
2540 brd->ports[0].ioaddr, brd->ports[0].ioaddr +
2541 8 * brd->info->nports - 1);
Jiri Slaby38daf882012-08-07 21:47:37 +02002542 return ret;
Jiri Slaby1c456072008-02-07 00:16:46 -08002543 }
2544 return brd->info->nports;
Jiri Slaby83766bc2008-07-25 01:48:21 -07002545
2546err_irqconflict:
2547 printk(KERN_ERR "mxser: invalid interrupt number\n");
2548 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002549}
2550
Bill Pemberton9671f092012-11-19 13:21:50 -05002551static int mxser_probe(struct pci_dev *pdev,
Jiri Slaby1c456072008-02-07 00:16:46 -08002552 const struct pci_device_id *ent)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002553{
Jiri Slaby1c456072008-02-07 00:16:46 -08002554#ifdef CONFIG_PCI
2555 struct mxser_board *brd;
2556 unsigned int i, j;
2557 unsigned long ioaddress;
Alexey Khoroshilov9e17df32013-02-17 02:24:37 +04002558 struct device *tty_dev;
Jiri Slaby1c456072008-02-07 00:16:46 -08002559 int retval = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002560
Jiri Slaby1c456072008-02-07 00:16:46 -08002561 for (i = 0; i < MXSER_BOARDS; i++)
2562 if (mxser_boards[i].info == NULL)
2563 break;
2564
2565 if (i >= MXSER_BOARDS) {
Jiri Slaby83766bc2008-07-25 01:48:21 -07002566 dev_err(&pdev->dev, "too many boards found (maximum %d), board "
2567 "not configured\n", MXSER_BOARDS);
Jiri Slaby1c456072008-02-07 00:16:46 -08002568 goto err;
2569 }
2570
2571 brd = &mxser_boards[i];
2572 brd->idx = i * MXSER_PORTS_PER_BOARD;
Jiri Slaby83766bc2008-07-25 01:48:21 -07002573 dev_info(&pdev->dev, "found MOXA %s board (BusNo=%d, DevNo=%d)\n",
Jiri Slaby1c456072008-02-07 00:16:46 -08002574 mxser_cards[ent->driver_data].name,
2575 pdev->bus->number, PCI_SLOT(pdev->devfn));
2576
2577 retval = pci_enable_device(pdev);
2578 if (retval) {
Jiri Slaby83766bc2008-07-25 01:48:21 -07002579 dev_err(&pdev->dev, "PCI enable failed\n");
Jiri Slaby1c456072008-02-07 00:16:46 -08002580 goto err;
2581 }
2582
2583 /* io address */
2584 ioaddress = pci_resource_start(pdev, 2);
2585 retval = pci_request_region(pdev, 2, "mxser(IO)");
2586 if (retval)
Jiri Slabydf480512010-09-03 10:31:37 +02002587 goto err_dis;
Jiri Slaby1c456072008-02-07 00:16:46 -08002588
2589 brd->info = &mxser_cards[ent->driver_data];
2590 for (i = 0; i < brd->info->nports; i++)
2591 brd->ports[i].ioaddr = ioaddress + 8 * i;
2592
2593 /* vector */
2594 ioaddress = pci_resource_start(pdev, 3);
2595 retval = pci_request_region(pdev, 3, "mxser(vector)");
2596 if (retval)
Jiri Slabydf480512010-09-03 10:31:37 +02002597 goto err_zero;
Jiri Slaby1c456072008-02-07 00:16:46 -08002598 brd->vector = ioaddress;
2599
2600 /* irq */
2601 brd->irq = pdev->irq;
2602
2603 brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr);
2604 brd->uart_type = PORT_16550A;
2605 brd->vector_mask = 0;
2606
2607 for (i = 0; i < brd->info->nports; i++) {
2608 for (j = 0; j < UART_INFO_NUM; j++) {
2609 if (Gpci_uart_info[j].type == brd->chip_flag) {
2610 brd->ports[i].max_baud =
2611 Gpci_uart_info[j].max_baud;
2612
2613 /* exception....CP-102 */
2614 if (brd->info->flags & MXSER_HIGHBAUD)
2615 brd->ports[i].max_baud = 921600;
2616 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002617 }
2618 }
Jiri Slaby1c456072008-02-07 00:16:46 -08002619 }
2620
2621 if (brd->chip_flag == MOXA_MUST_MU860_HWID) {
2622 for (i = 0; i < brd->info->nports; i++) {
2623 if (i < 4)
2624 brd->ports[i].opmode_ioaddr = ioaddress + 4;
2625 else
2626 brd->ports[i].opmode_ioaddr = ioaddress + 0x0c;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002627 }
Jiri Slaby1c456072008-02-07 00:16:46 -08002628 outb(0, ioaddress + 4); /* default set to RS232 mode */
2629 outb(0, ioaddress + 0x0c); /* default set to RS232 mode */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002630 }
Jiri Slaby1c456072008-02-07 00:16:46 -08002631
2632 for (i = 0; i < brd->info->nports; i++) {
2633 brd->vector_mask |= (1 << i);
2634 brd->ports[i].baud_base = 921600;
2635 }
2636
2637 /* mxser_initbrd will hook ISR. */
2638 retval = mxser_initbrd(brd, pdev);
2639 if (retval)
Jiri Slabydf480512010-09-03 10:31:37 +02002640 goto err_rel3;
Jiri Slaby1c456072008-02-07 00:16:46 -08002641
Alexey Khoroshilov9e17df32013-02-17 02:24:37 +04002642 for (i = 0; i < brd->info->nports; i++) {
2643 tty_dev = tty_port_register_device(&brd->ports[i].port,
2644 mxvar_sdriver, brd->idx + i, &pdev->dev);
2645 if (IS_ERR(tty_dev)) {
2646 retval = PTR_ERR(tty_dev);
Alexey Khoroshilov1b581f12013-04-07 23:46:47 +04002647 for (; i > 0; i--)
Alexey Khoroshilov9e17df32013-02-17 02:24:37 +04002648 tty_unregister_device(mxvar_sdriver,
Alexey Khoroshilov1b581f12013-04-07 23:46:47 +04002649 brd->idx + i - 1);
Alexey Khoroshilov9e17df32013-02-17 02:24:37 +04002650 goto err_relbrd;
2651 }
2652 }
Jiri Slaby1c456072008-02-07 00:16:46 -08002653
2654 pci_set_drvdata(pdev, brd);
2655
2656 return 0;
Alexey Khoroshilov9e17df32013-02-17 02:24:37 +04002657err_relbrd:
2658 for (i = 0; i < brd->info->nports; i++)
2659 tty_port_destroy(&brd->ports[i].port);
2660 free_irq(brd->irq, brd);
Jiri Slabydf480512010-09-03 10:31:37 +02002661err_rel3:
2662 pci_release_region(pdev, 3);
2663err_zero:
Jiri Slaby1c456072008-02-07 00:16:46 -08002664 brd->info = NULL;
Jiri Slabydf480512010-09-03 10:31:37 +02002665 pci_release_region(pdev, 2);
2666err_dis:
2667 pci_disable_device(pdev);
Jiri Slaby1c456072008-02-07 00:16:46 -08002668err:
2669 return retval;
2670#else
2671 return -ENODEV;
2672#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002673}
2674
Bill Pembertonae8d8a12012-11-19 13:26:18 -05002675static void mxser_remove(struct pci_dev *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002676{
Jiri Slabydf480512010-09-03 10:31:37 +02002677#ifdef CONFIG_PCI
Jiri Slaby1c456072008-02-07 00:16:46 -08002678 struct mxser_board *brd = pci_get_drvdata(pdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002679
Jiri Slaby191c5f12012-11-15 09:49:56 +01002680 mxser_board_remove(brd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002681
Jiri Slabydf480512010-09-03 10:31:37 +02002682 pci_release_region(pdev, 2);
2683 pci_release_region(pdev, 3);
2684 pci_disable_device(pdev);
Jiri Slaby1c456072008-02-07 00:16:46 -08002685 brd->info = NULL;
Jiri Slabydf480512010-09-03 10:31:37 +02002686#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002687}
2688
Jiri Slaby1c456072008-02-07 00:16:46 -08002689static struct pci_driver mxser_driver = {
2690 .name = "mxser",
2691 .id_table = mxser_pcibrds,
2692 .probe = mxser_probe,
Bill Pemberton91116cb2012-11-19 13:21:06 -05002693 .remove = mxser_remove
Jiri Slaby1c456072008-02-07 00:16:46 -08002694};
Linus Torvalds1da177e2005-04-16 15:20:36 -07002695
Jiri Slaby1c456072008-02-07 00:16:46 -08002696static int __init mxser_module_init(void)
2697{
2698 struct mxser_board *brd;
Alexey Khoroshilov9e17df32013-02-17 02:24:37 +04002699 struct device *tty_dev;
Jiri Slaby1df00922008-07-25 01:48:22 -07002700 unsigned int b, i, m;
2701 int retval;
Jiri Slaby1c456072008-02-07 00:16:46 -08002702
Jiri Slaby1c456072008-02-07 00:16:46 -08002703 mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
2704 if (!mxvar_sdriver)
2705 return -ENOMEM;
2706
2707 printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
2708 MXSER_VERSION);
2709
2710 /* Initialize the tty_driver structure */
Jiri Slaby1c456072008-02-07 00:16:46 -08002711 mxvar_sdriver->name = "ttyMI";
2712 mxvar_sdriver->major = ttymajor;
2713 mxvar_sdriver->minor_start = 0;
Jiri Slaby1c456072008-02-07 00:16:46 -08002714 mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
2715 mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
2716 mxvar_sdriver->init_termios = tty_std_termios;
2717 mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
2718 mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_DYNAMIC_DEV;
2719 tty_set_operations(mxvar_sdriver, &mxser_ops);
2720
2721 retval = tty_register_driver(mxvar_sdriver);
2722 if (retval) {
2723 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family "
2724 "tty driver !\n");
2725 goto err_put;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002726 }
Jiri Slaby1c456072008-02-07 00:16:46 -08002727
Jiri Slaby1c456072008-02-07 00:16:46 -08002728 /* Start finding ISA boards here */
Jiri Slaby1df00922008-07-25 01:48:22 -07002729 for (m = 0, b = 0; b < MXSER_BOARDS; b++) {
2730 if (!ioaddr[b])
2731 continue;
Jiri Slaby1c456072008-02-07 00:16:46 -08002732
Jiri Slaby1df00922008-07-25 01:48:22 -07002733 brd = &mxser_boards[m];
Peter Botha96050df2009-06-09 17:16:32 -07002734 retval = mxser_get_ISA_conf(ioaddr[b], brd);
Jiri Slaby1df00922008-07-25 01:48:22 -07002735 if (retval <= 0) {
2736 brd->info = NULL;
2737 continue;
Jiri Slaby1c456072008-02-07 00:16:46 -08002738 }
2739
Jiri Slaby1df00922008-07-25 01:48:22 -07002740 printk(KERN_INFO "mxser: found MOXA %s board (CAP=0x%lx)\n",
2741 brd->info->name, ioaddr[b]);
2742
2743 /* mxser_initbrd will hook ISR. */
2744 if (mxser_initbrd(brd, NULL) < 0) {
Alexey Khoroshilov9e17df32013-02-17 02:24:37 +04002745 mxser_release_ISA_res(brd);
Jiri Slaby1df00922008-07-25 01:48:22 -07002746 brd->info = NULL;
2747 continue;
2748 }
2749
2750 brd->idx = m * MXSER_PORTS_PER_BOARD;
Alexey Khoroshilov9e17df32013-02-17 02:24:37 +04002751 for (i = 0; i < brd->info->nports; i++) {
2752 tty_dev = tty_port_register_device(&brd->ports[i].port,
Jiri Slaby734cc172012-08-07 21:47:47 +02002753 mxvar_sdriver, brd->idx + i, NULL);
Alexey Khoroshilov9e17df32013-02-17 02:24:37 +04002754 if (IS_ERR(tty_dev)) {
Alexey Khoroshilov1b581f12013-04-07 23:46:47 +04002755 for (; i > 0; i--)
Alexey Khoroshilov9e17df32013-02-17 02:24:37 +04002756 tty_unregister_device(mxvar_sdriver,
Alexey Khoroshilov1b581f12013-04-07 23:46:47 +04002757 brd->idx + i - 1);
Alexey Khoroshilov9e17df32013-02-17 02:24:37 +04002758 for (i = 0; i < brd->info->nports; i++)
2759 tty_port_destroy(&brd->ports[i].port);
2760 free_irq(brd->irq, brd);
2761 mxser_release_ISA_res(brd);
2762 brd->info = NULL;
2763 break;
2764 }
2765 }
2766 if (brd->info == NULL)
2767 continue;
Jiri Slaby1df00922008-07-25 01:48:22 -07002768
2769 m++;
2770 }
2771
Jiri Slaby1c456072008-02-07 00:16:46 -08002772 retval = pci_register_driver(&mxser_driver);
2773 if (retval) {
Jiri Slaby83766bc2008-07-25 01:48:21 -07002774 printk(KERN_ERR "mxser: can't register pci driver\n");
Jiri Slaby1c456072008-02-07 00:16:46 -08002775 if (!m) {
2776 retval = -ENODEV;
2777 goto err_unr;
2778 } /* else: we have some ISA cards under control */
2779 }
2780
Jiri Slaby1c456072008-02-07 00:16:46 -08002781 return 0;
2782err_unr:
2783 tty_unregister_driver(mxvar_sdriver);
2784err_put:
2785 put_tty_driver(mxvar_sdriver);
2786 return retval;
2787}
2788
2789static void __exit mxser_module_exit(void)
2790{
Jiri Slaby191c5f12012-11-15 09:49:56 +01002791 unsigned int i;
Jiri Slaby1c456072008-02-07 00:16:46 -08002792
Jiri Slaby1c456072008-02-07 00:16:46 -08002793 pci_unregister_driver(&mxser_driver);
2794
2795 for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */
2796 if (mxser_boards[i].info != NULL)
Jiri Slaby191c5f12012-11-15 09:49:56 +01002797 mxser_board_remove(&mxser_boards[i]);
Jiri Slaby1c456072008-02-07 00:16:46 -08002798 tty_unregister_driver(mxvar_sdriver);
2799 put_tty_driver(mxvar_sdriver);
2800
2801 for (i = 0; i < MXSER_BOARDS; i++)
2802 if (mxser_boards[i].info != NULL)
Jiri Slabydf480512010-09-03 10:31:37 +02002803 mxser_release_ISA_res(&mxser_boards[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002804}
2805
2806module_init(mxser_module_init);
2807module_exit(mxser_module_exit);