Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * mxser.c -- MOXA Smartio/Industio family multiport serial driver. | |
3 | * | |
80ff8a80 JS |
4 | * Copyright (C) 1999-2006 Moxa Technologies (support@moxa.com). |
5 | * Copyright (C) 2006-2008 Jiri Slaby <jirislaby@gmail.com> | |
1da177e4 | 6 | * |
1c45607a JS |
7 | * 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. | |
1da177e4 LT |
10 | * |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License as published by | |
13 | * the Free Software Foundation; either version 2 of the License, or | |
8ea2c2ec | 14 | * (at your option) any later version. |
1da177e4 | 15 | * |
1da177e4 | 16 | * Fed through a cleanup, indent and remove of non 2.6 code by Alan Cox |
8eb04cf3 AC |
17 | * <alan@lxorguk.ukuu.org.uk>. The original 1.8 code is available on |
18 | * www.moxa.com. | |
1da177e4 | 19 | * - Fixed x86_64 cleanness |
1da177e4 LT |
20 | */ |
21 | ||
1da177e4 | 22 | #include <linux/module.h> |
1da177e4 LT |
23 | #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> | |
1da177e4 LT |
36 | #include <linux/ioport.h> |
37 | #include <linux/mm.h> | |
1da177e4 LT |
38 | #include <linux/delay.h> |
39 | #include <linux/pci.h> | |
1977f032 | 40 | #include <linux/bitops.h> |
5a0e3ad6 | 41 | #include <linux/slab.h> |
1da177e4 LT |
42 | |
43 | #include <asm/system.h> | |
44 | #include <asm/io.h> | |
45 | #include <asm/irq.h> | |
1da177e4 LT |
46 | #include <asm/uaccess.h> |
47 | ||
48 | #include "mxser.h" | |
49 | ||
502f295f | 50 | #define MXSER_VERSION "2.0.5" /* 1.14 */ |
1da177e4 | 51 | #define MXSERMAJOR 174 |
1da177e4 | 52 | |
1da177e4 | 53 | #define MXSER_BOARDS 4 /* Max. boards */ |
1da177e4 | 54 | #define MXSER_PORTS_PER_BOARD 8 /* Max. ports per board */ |
1c45607a JS |
55 | #define MXSER_PORTS (MXSER_BOARDS * MXSER_PORTS_PER_BOARD) |
56 | #define MXSER_ISR_PASS_LIMIT 100 | |
1da177e4 | 57 | |
1c45607a JS |
58 | /*CheckIsMoxaMust return value*/ |
59 | #define MOXA_OTHER_UART 0x00 | |
60 | #define MOXA_MUST_MU150_HWID 0x01 | |
61 | #define MOXA_MUST_MU860_HWID 0x02 | |
62 | ||
1da177e4 LT |
63 | #define WAKEUP_CHARS 256 |
64 | ||
65 | #define UART_MCR_AFE 0x20 | |
66 | #define UART_LSR_SPECIAL 0x1E | |
67 | ||
e129deff | 68 | #define PCI_DEVICE_ID_POS104UL 0x1044 |
1c45607a | 69 | #define PCI_DEVICE_ID_CB108 0x1080 |
e129deff | 70 | #define PCI_DEVICE_ID_CP102UF 0x1023 |
502f295f | 71 | #define PCI_DEVICE_ID_CP112UL 0x1120 |
1c45607a | 72 | #define PCI_DEVICE_ID_CB114 0x1142 |
80ff8a80 | 73 | #define PCI_DEVICE_ID_CP114UL 0x1143 |
1c45607a JS |
74 | #define PCI_DEVICE_ID_CB134I 0x1341 |
75 | #define PCI_DEVICE_ID_CP138U 0x1380 | |
1da177e4 | 76 | |
1da177e4 LT |
77 | |
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 | ||
1c45607a JS |
85 | #define MXSER_HIGHBAUD 1 |
86 | #define MXSER_HAS2 2 | |
1da177e4 | 87 | |
8ea2c2ec | 88 | /* This is only for PCI */ |
1c45607a | 89 | static const struct { |
1da177e4 LT |
90 | 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; | |
1c45607a | 98 | } Gpci_uart_info[] = { |
1da177e4 LT |
99 | {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 | }; | |
1c45607a | 103 | #define UART_INFO_NUM ARRAY_SIZE(Gpci_uart_info) |
1da177e4 | 104 | |
1c45607a JS |
105 | struct mxser_cardinfo { |
106 | char *name; | |
107 | unsigned int nports; | |
108 | unsigned int flags; | |
109 | }; | |
1da177e4 | 110 | |
1c45607a JS |
111 | static 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, }, | |
80ff8a80 | 140 | { "POS-104UL series", 4, }, |
e129deff | 141 | { "CP-114UL series", 4, }, |
502f295f JS |
142 | /*30*/ { "CP-102UF series", 2, }, |
143 | { "CP-112UL series", 2, }, | |
1c45607a | 144 | }; |
1da177e4 | 145 | |
1c45607a JS |
146 | /* driver_data correspond to the lines in the structure above |
147 | see also ISA probe function before you change something */ | |
1da177e4 | 148 | static struct pci_device_id mxser_pcibrds[] = { |
1c45607a JS |
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 }, | |
80ff8a80 | 172 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP114UL), .driver_data = 29 }, |
e129deff | 173 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP102UF), .driver_data = 30 }, |
502f295f | 174 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP112UL), .driver_data = 31 }, |
1c45607a | 175 | { } |
1da177e4 | 176 | }; |
1da177e4 LT |
177 | MODULE_DEVICE_TABLE(pci, mxser_pcibrds); |
178 | ||
1df00924 | 179 | static unsigned long ioaddr[MXSER_BOARDS]; |
1da177e4 | 180 | static int ttymajor = MXSERMAJOR; |
1da177e4 LT |
181 | |
182 | /* Variables for insmod */ | |
183 | ||
184 | MODULE_AUTHOR("Casper Yang"); | |
185 | MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver"); | |
1df00924 JS |
186 | module_param_array(ioaddr, ulong, NULL, 0); |
187 | MODULE_PARM_DESC(ioaddr, "ISA io addresses to look for a moxa board"); | |
8d3b33f6 | 188 | module_param(ttymajor, int, 0); |
1da177e4 LT |
189 | MODULE_LICENSE("GPL"); |
190 | ||
191 | struct mxser_log { | |
192 | int tick; | |
193 | unsigned long rxcnt[MXSER_PORTS]; | |
194 | unsigned long txcnt[MXSER_PORTS]; | |
195 | }; | |
196 | ||
1da177e4 LT |
197 | struct 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 | ||
206 | struct 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 | }; | |
8ea2c2ec | 221 | |
1c45607a JS |
222 | struct mxser_board; |
223 | ||
224 | struct mxser_port { | |
0ad9e7d1 | 225 | struct tty_port port; |
1c45607a | 226 | struct mxser_board *board; |
1c45607a JS |
227 | |
228 | unsigned long ioaddr; | |
229 | unsigned long opmode_ioaddr; | |
230 | int max_baud; | |
1da177e4 | 231 | |
1da177e4 LT |
232 | int rx_high_water; |
233 | int rx_trigger; /* Rx fifo trigger level */ | |
234 | int rx_low_water; | |
235 | int baud_base; /* max. speed */ | |
1da177e4 | 236 | int type; /* UART type */ |
1c45607a | 237 | |
1da177e4 | 238 | int x_char; /* xon/xoff character */ |
1da177e4 LT |
239 | int IER; /* Interrupt Enable Register */ |
240 | int MCR; /* Modem control register */ | |
1c45607a JS |
241 | |
242 | unsigned char stop_rx; | |
243 | unsigned char ldisc_stop_rx; | |
244 | ||
245 | int custom_divisor; | |
1c45607a | 246 | unsigned char err_shadow; |
1c45607a | 247 | |
1c45607a JS |
248 | struct async_icount icount; /* kernel counters for 4 input interrupts */ |
249 | int timeout; | |
250 | ||
251 | int read_status_mask; | |
252 | int ignore_status_mask; | |
253 | int xmit_fifo_size; | |
1da177e4 LT |
254 | int xmit_head; |
255 | int xmit_tail; | |
256 | int xmit_cnt; | |
1c45607a | 257 | |
606d099c | 258 | struct ktermios normal_termios; |
1c45607a | 259 | |
1da177e4 | 260 | struct mxser_mon mon_data; |
1c45607a | 261 | |
1da177e4 | 262 | spinlock_t slock; |
1c45607a JS |
263 | }; |
264 | ||
265 | struct mxser_board { | |
266 | unsigned int idx; | |
267 | int irq; | |
268 | const struct mxser_cardinfo *info; | |
269 | unsigned long vector; | |
270 | unsigned long vector_mask; | |
271 | ||
272 | int chip_flag; | |
273 | int uart_type; | |
274 | ||
275 | struct mxser_port ports[MXSER_PORTS_PER_BOARD]; | |
1da177e4 LT |
276 | }; |
277 | ||
1da177e4 LT |
278 | struct mxser_mstatus { |
279 | tcflag_t cflag; | |
280 | int cts; | |
281 | int dsr; | |
282 | int ri; | |
283 | int dcd; | |
284 | }; | |
285 | ||
1c45607a | 286 | static struct mxser_board mxser_boards[MXSER_BOARDS]; |
1da177e4 | 287 | static struct tty_driver *mxvar_sdriver; |
1da177e4 | 288 | static struct mxser_log mxvar_log; |
1da177e4 | 289 | static int mxser_set_baud_method[MXSER_PORTS + 1]; |
1da177e4 | 290 | |
148ff86b CH |
291 | static void mxser_enable_must_enchance_mode(unsigned long baseio) |
292 | { | |
293 | u8 oldlcr; | |
294 | u8 efr; | |
295 | ||
296 | oldlcr = inb(baseio + UART_LCR); | |
297 | outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); | |
298 | ||
299 | efr = inb(baseio + MOXA_MUST_EFR_REGISTER); | |
300 | efr |= MOXA_MUST_EFR_EFRB_ENABLE; | |
301 | ||
302 | outb(efr, baseio + MOXA_MUST_EFR_REGISTER); | |
303 | outb(oldlcr, baseio + UART_LCR); | |
304 | } | |
305 | ||
306 | static void mxser_disable_must_enchance_mode(unsigned long baseio) | |
307 | { | |
308 | u8 oldlcr; | |
309 | u8 efr; | |
310 | ||
311 | oldlcr = inb(baseio + UART_LCR); | |
312 | outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); | |
313 | ||
314 | efr = inb(baseio + MOXA_MUST_EFR_REGISTER); | |
315 | efr &= ~MOXA_MUST_EFR_EFRB_ENABLE; | |
316 | ||
317 | outb(efr, baseio + MOXA_MUST_EFR_REGISTER); | |
318 | outb(oldlcr, baseio + UART_LCR); | |
319 | } | |
320 | ||
321 | static void mxser_set_must_xon1_value(unsigned long baseio, u8 value) | |
322 | { | |
323 | u8 oldlcr; | |
324 | u8 efr; | |
325 | ||
326 | oldlcr = inb(baseio + UART_LCR); | |
327 | outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); | |
328 | ||
329 | efr = inb(baseio + MOXA_MUST_EFR_REGISTER); | |
330 | efr &= ~MOXA_MUST_EFR_BANK_MASK; | |
331 | efr |= MOXA_MUST_EFR_BANK0; | |
332 | ||
333 | outb(efr, baseio + MOXA_MUST_EFR_REGISTER); | |
334 | outb(value, baseio + MOXA_MUST_XON1_REGISTER); | |
335 | outb(oldlcr, baseio + UART_LCR); | |
336 | } | |
337 | ||
338 | static void mxser_set_must_xoff1_value(unsigned long baseio, u8 value) | |
339 | { | |
340 | u8 oldlcr; | |
341 | u8 efr; | |
342 | ||
343 | oldlcr = inb(baseio + UART_LCR); | |
344 | outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); | |
345 | ||
346 | efr = inb(baseio + MOXA_MUST_EFR_REGISTER); | |
347 | efr &= ~MOXA_MUST_EFR_BANK_MASK; | |
348 | efr |= MOXA_MUST_EFR_BANK0; | |
349 | ||
350 | outb(efr, baseio + MOXA_MUST_EFR_REGISTER); | |
351 | outb(value, baseio + MOXA_MUST_XOFF1_REGISTER); | |
352 | outb(oldlcr, baseio + UART_LCR); | |
353 | } | |
354 | ||
355 | static void mxser_set_must_fifo_value(struct mxser_port *info) | |
356 | { | |
357 | u8 oldlcr; | |
358 | u8 efr; | |
359 | ||
360 | oldlcr = inb(info->ioaddr + UART_LCR); | |
361 | outb(MOXA_MUST_ENTER_ENCHANCE, info->ioaddr + UART_LCR); | |
362 | ||
363 | efr = inb(info->ioaddr + MOXA_MUST_EFR_REGISTER); | |
364 | efr &= ~MOXA_MUST_EFR_BANK_MASK; | |
365 | efr |= MOXA_MUST_EFR_BANK1; | |
366 | ||
367 | outb(efr, info->ioaddr + MOXA_MUST_EFR_REGISTER); | |
368 | outb((u8)info->rx_high_water, info->ioaddr + MOXA_MUST_RBRTH_REGISTER); | |
369 | outb((u8)info->rx_trigger, info->ioaddr + MOXA_MUST_RBRTI_REGISTER); | |
370 | outb((u8)info->rx_low_water, info->ioaddr + MOXA_MUST_RBRTL_REGISTER); | |
371 | outb(oldlcr, info->ioaddr + UART_LCR); | |
372 | } | |
373 | ||
374 | static void mxser_set_must_enum_value(unsigned long baseio, u8 value) | |
375 | { | |
376 | u8 oldlcr; | |
377 | u8 efr; | |
378 | ||
379 | oldlcr = inb(baseio + UART_LCR); | |
380 | outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); | |
381 | ||
382 | efr = inb(baseio + MOXA_MUST_EFR_REGISTER); | |
383 | efr &= ~MOXA_MUST_EFR_BANK_MASK; | |
384 | efr |= MOXA_MUST_EFR_BANK2; | |
385 | ||
386 | outb(efr, baseio + MOXA_MUST_EFR_REGISTER); | |
387 | outb(value, baseio + MOXA_MUST_ENUM_REGISTER); | |
388 | outb(oldlcr, baseio + UART_LCR); | |
389 | } | |
390 | ||
391 | static void mxser_get_must_hardware_id(unsigned long baseio, u8 *pId) | |
392 | { | |
393 | u8 oldlcr; | |
394 | u8 efr; | |
395 | ||
396 | oldlcr = inb(baseio + UART_LCR); | |
397 | outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); | |
398 | ||
399 | efr = inb(baseio + MOXA_MUST_EFR_REGISTER); | |
400 | efr &= ~MOXA_MUST_EFR_BANK_MASK; | |
401 | efr |= MOXA_MUST_EFR_BANK2; | |
402 | ||
403 | outb(efr, baseio + MOXA_MUST_EFR_REGISTER); | |
404 | *pId = inb(baseio + MOXA_MUST_HWID_REGISTER); | |
405 | outb(oldlcr, baseio + UART_LCR); | |
406 | } | |
407 | ||
408 | static void SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(unsigned long baseio) | |
409 | { | |
410 | u8 oldlcr; | |
411 | u8 efr; | |
412 | ||
413 | oldlcr = inb(baseio + UART_LCR); | |
414 | outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); | |
415 | ||
416 | efr = inb(baseio + MOXA_MUST_EFR_REGISTER); | |
417 | efr &= ~MOXA_MUST_EFR_SF_MASK; | |
418 | ||
419 | outb(efr, baseio + MOXA_MUST_EFR_REGISTER); | |
420 | outb(oldlcr, baseio + UART_LCR); | |
421 | } | |
422 | ||
423 | static void mxser_enable_must_tx_software_flow_control(unsigned long baseio) | |
424 | { | |
425 | u8 oldlcr; | |
426 | u8 efr; | |
427 | ||
428 | oldlcr = inb(baseio + UART_LCR); | |
429 | outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); | |
430 | ||
431 | efr = inb(baseio + MOXA_MUST_EFR_REGISTER); | |
432 | efr &= ~MOXA_MUST_EFR_SF_TX_MASK; | |
433 | efr |= MOXA_MUST_EFR_SF_TX1; | |
434 | ||
435 | outb(efr, baseio + MOXA_MUST_EFR_REGISTER); | |
436 | outb(oldlcr, baseio + UART_LCR); | |
437 | } | |
438 | ||
439 | static void mxser_disable_must_tx_software_flow_control(unsigned long baseio) | |
440 | { | |
441 | u8 oldlcr; | |
442 | u8 efr; | |
443 | ||
444 | oldlcr = inb(baseio + UART_LCR); | |
445 | outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); | |
446 | ||
447 | efr = inb(baseio + MOXA_MUST_EFR_REGISTER); | |
448 | efr &= ~MOXA_MUST_EFR_SF_TX_MASK; | |
449 | ||
450 | outb(efr, baseio + MOXA_MUST_EFR_REGISTER); | |
451 | outb(oldlcr, baseio + UART_LCR); | |
452 | } | |
453 | ||
454 | static void mxser_enable_must_rx_software_flow_control(unsigned long baseio) | |
455 | { | |
456 | u8 oldlcr; | |
457 | u8 efr; | |
458 | ||
459 | oldlcr = inb(baseio + UART_LCR); | |
460 | outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); | |
461 | ||
462 | efr = inb(baseio + MOXA_MUST_EFR_REGISTER); | |
463 | efr &= ~MOXA_MUST_EFR_SF_RX_MASK; | |
464 | efr |= MOXA_MUST_EFR_SF_RX1; | |
465 | ||
466 | outb(efr, baseio + MOXA_MUST_EFR_REGISTER); | |
467 | outb(oldlcr, baseio + UART_LCR); | |
468 | } | |
469 | ||
470 | static void mxser_disable_must_rx_software_flow_control(unsigned long baseio) | |
471 | { | |
472 | u8 oldlcr; | |
473 | u8 efr; | |
474 | ||
475 | oldlcr = inb(baseio + UART_LCR); | |
476 | outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); | |
477 | ||
478 | efr = inb(baseio + MOXA_MUST_EFR_REGISTER); | |
479 | efr &= ~MOXA_MUST_EFR_SF_RX_MASK; | |
480 | ||
481 | outb(efr, baseio + MOXA_MUST_EFR_REGISTER); | |
482 | outb(oldlcr, baseio + UART_LCR); | |
483 | } | |
484 | ||
b8cc5549 | 485 | #ifdef CONFIG_PCI |
1c45607a | 486 | static int __devinit CheckIsMoxaMust(unsigned long io) |
1da177e4 LT |
487 | { |
488 | u8 oldmcr, hwid; | |
489 | int i; | |
490 | ||
491 | outb(0, io + UART_LCR); | |
148ff86b | 492 | mxser_disable_must_enchance_mode(io); |
1da177e4 LT |
493 | oldmcr = inb(io + UART_MCR); |
494 | outb(0, io + UART_MCR); | |
148ff86b | 495 | mxser_set_must_xon1_value(io, 0x11); |
1da177e4 LT |
496 | if ((hwid = inb(io + UART_MCR)) != 0) { |
497 | outb(oldmcr, io + UART_MCR); | |
8ea2c2ec | 498 | return MOXA_OTHER_UART; |
1da177e4 LT |
499 | } |
500 | ||
148ff86b | 501 | mxser_get_must_hardware_id(io, &hwid); |
1c45607a JS |
502 | for (i = 1; i < UART_INFO_NUM; i++) { /* 0 = OTHER_UART */ |
503 | if (hwid == Gpci_uart_info[i].type) | |
8ea2c2ec | 504 | return (int)hwid; |
1da177e4 LT |
505 | } |
506 | return MOXA_OTHER_UART; | |
507 | } | |
b8cc5549 | 508 | #endif |
1da177e4 | 509 | |
1c45607a | 510 | static void process_txrx_fifo(struct mxser_port *info) |
1da177e4 LT |
511 | { |
512 | int i; | |
513 | ||
514 | if ((info->type == PORT_16450) || (info->type == PORT_8250)) { | |
515 | info->rx_trigger = 1; | |
516 | info->rx_high_water = 1; | |
517 | info->rx_low_water = 1; | |
518 | info->xmit_fifo_size = 1; | |
1c45607a JS |
519 | } else |
520 | for (i = 0; i < UART_INFO_NUM; i++) | |
521 | if (info->board->chip_flag == Gpci_uart_info[i].type) { | |
1da177e4 LT |
522 | info->rx_trigger = Gpci_uart_info[i].rx_trigger; |
523 | info->rx_low_water = Gpci_uart_info[i].rx_low_water; | |
524 | info->rx_high_water = Gpci_uart_info[i].rx_high_water; | |
525 | info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size; | |
526 | break; | |
527 | } | |
1da177e4 LT |
528 | } |
529 | ||
1c45607a | 530 | static unsigned char mxser_get_msr(int baseaddr, int mode, int port) |
1da177e4 | 531 | { |
72800df9 | 532 | static unsigned char mxser_msr[MXSER_PORTS + 1]; |
1c45607a | 533 | unsigned char status = 0; |
1da177e4 | 534 | |
1c45607a | 535 | status = inb(baseaddr + UART_MSR); |
1da177e4 | 536 | |
1c45607a JS |
537 | mxser_msr[port] &= 0x0F; |
538 | mxser_msr[port] |= status; | |
539 | status = mxser_msr[port]; | |
540 | if (mode) | |
541 | mxser_msr[port] = 0; | |
1da177e4 | 542 | |
1c45607a JS |
543 | return status; |
544 | } | |
1da177e4 | 545 | |
31f35939 AC |
546 | static int mxser_carrier_raised(struct tty_port *port) |
547 | { | |
548 | struct mxser_port *mp = container_of(port, struct mxser_port, port); | |
549 | return (inb(mp->ioaddr + UART_MSR) & UART_MSR_DCD)?1:0; | |
550 | } | |
551 | ||
fcc8ac18 | 552 | static void mxser_dtr_rts(struct tty_port *port, int on) |
5d951fb4 AC |
553 | { |
554 | struct mxser_port *mp = container_of(port, struct mxser_port, port); | |
555 | unsigned long flags; | |
556 | ||
557 | spin_lock_irqsave(&mp->slock, flags); | |
fcc8ac18 AC |
558 | if (on) |
559 | outb(inb(mp->ioaddr + UART_MCR) | | |
560 | UART_MCR_DTR | UART_MCR_RTS, mp->ioaddr + UART_MCR); | |
561 | else | |
562 | outb(inb(mp->ioaddr + UART_MCR)&~(UART_MCR_DTR | UART_MCR_RTS), | |
563 | mp->ioaddr + UART_MCR); | |
5d951fb4 AC |
564 | spin_unlock_irqrestore(&mp->slock, flags); |
565 | } | |
566 | ||
216ba023 | 567 | static int mxser_set_baud(struct tty_struct *tty, long newspd) |
1da177e4 | 568 | { |
216ba023 | 569 | struct mxser_port *info = tty->driver_data; |
1c45607a JS |
570 | int quot = 0, baud; |
571 | unsigned char cval; | |
1da177e4 | 572 | |
216ba023 | 573 | if (!info->ioaddr) |
1c45607a | 574 | return -1; |
1da177e4 | 575 | |
1c45607a JS |
576 | if (newspd > info->max_baud) |
577 | return -1; | |
1da177e4 | 578 | |
1c45607a JS |
579 | if (newspd == 134) { |
580 | quot = 2 * info->baud_base / 269; | |
216ba023 | 581 | tty_encode_baud_rate(tty, 134, 134); |
1c45607a JS |
582 | } else if (newspd) { |
583 | quot = info->baud_base / newspd; | |
584 | if (quot == 0) | |
585 | quot = 1; | |
586 | baud = info->baud_base/quot; | |
216ba023 | 587 | tty_encode_baud_rate(tty, baud, baud); |
1c45607a JS |
588 | } else { |
589 | quot = 0; | |
590 | } | |
1da177e4 | 591 | |
1c45607a JS |
592 | info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base); |
593 | info->timeout += HZ / 50; /* Add .02 seconds of slop */ | |
1da177e4 | 594 | |
1c45607a JS |
595 | if (quot) { |
596 | info->MCR |= UART_MCR_DTR; | |
597 | outb(info->MCR, info->ioaddr + UART_MCR); | |
598 | } else { | |
599 | info->MCR &= ~UART_MCR_DTR; | |
600 | outb(info->MCR, info->ioaddr + UART_MCR); | |
601 | return 0; | |
602 | } | |
1da177e4 | 603 | |
1c45607a | 604 | cval = inb(info->ioaddr + UART_LCR); |
1da177e4 | 605 | |
1c45607a | 606 | outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR); /* set DLAB */ |
1da177e4 | 607 | |
1c45607a JS |
608 | outb(quot & 0xff, info->ioaddr + UART_DLL); /* LS of divisor */ |
609 | outb(quot >> 8, info->ioaddr + UART_DLM); /* MS of divisor */ | |
610 | outb(cval, info->ioaddr + UART_LCR); /* reset DLAB */ | |
1da177e4 | 611 | |
1c45607a | 612 | #ifdef BOTHER |
216ba023 | 613 | if (C_BAUD(tty) == BOTHER) { |
1c45607a JS |
614 | quot = info->baud_base % newspd; |
615 | quot *= 8; | |
616 | if (quot % newspd > newspd / 2) { | |
617 | quot /= newspd; | |
618 | quot++; | |
619 | } else | |
620 | quot /= newspd; | |
621 | ||
148ff86b | 622 | mxser_set_must_enum_value(info->ioaddr, quot); |
1c45607a JS |
623 | } else |
624 | #endif | |
148ff86b | 625 | mxser_set_must_enum_value(info->ioaddr, 0); |
1da177e4 | 626 | |
8ea2c2ec | 627 | return 0; |
1da177e4 | 628 | } |
1da177e4 | 629 | |
1c45607a JS |
630 | /* |
631 | * This routine is called to set the UART divisor registers to match | |
632 | * the specified baud rate for a serial port. | |
633 | */ | |
216ba023 AC |
634 | static int mxser_change_speed(struct tty_struct *tty, |
635 | struct ktermios *old_termios) | |
1da177e4 | 636 | { |
216ba023 | 637 | struct mxser_port *info = tty->driver_data; |
1c45607a JS |
638 | unsigned cflag, cval, fcr; |
639 | int ret = 0; | |
640 | unsigned char status; | |
1da177e4 | 641 | |
216ba023 AC |
642 | cflag = tty->termios->c_cflag; |
643 | if (!info->ioaddr) | |
1c45607a | 644 | return ret; |
1da177e4 | 645 | |
216ba023 AC |
646 | if (mxser_set_baud_method[tty->index] == 0) |
647 | mxser_set_baud(tty, tty_get_baud_rate(tty)); | |
1da177e4 | 648 | |
1c45607a JS |
649 | /* byte size and parity */ |
650 | switch (cflag & CSIZE) { | |
651 | case CS5: | |
652 | cval = 0x00; | |
653 | break; | |
654 | case CS6: | |
655 | cval = 0x01; | |
656 | break; | |
657 | case CS7: | |
658 | cval = 0x02; | |
659 | break; | |
660 | case CS8: | |
661 | cval = 0x03; | |
662 | break; | |
663 | default: | |
664 | cval = 0x00; | |
665 | break; /* too keep GCC shut... */ | |
666 | } | |
667 | if (cflag & CSTOPB) | |
668 | cval |= 0x04; | |
669 | if (cflag & PARENB) | |
670 | cval |= UART_LCR_PARITY; | |
671 | if (!(cflag & PARODD)) | |
672 | cval |= UART_LCR_EPAR; | |
673 | if (cflag & CMSPAR) | |
674 | cval |= UART_LCR_SPAR; | |
1da177e4 | 675 | |
1c45607a JS |
676 | if ((info->type == PORT_8250) || (info->type == PORT_16450)) { |
677 | if (info->board->chip_flag) { | |
678 | fcr = UART_FCR_ENABLE_FIFO; | |
679 | fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE; | |
148ff86b | 680 | mxser_set_must_fifo_value(info); |
1c45607a JS |
681 | } else |
682 | fcr = 0; | |
683 | } else { | |
684 | fcr = UART_FCR_ENABLE_FIFO; | |
685 | if (info->board->chip_flag) { | |
686 | fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE; | |
148ff86b | 687 | mxser_set_must_fifo_value(info); |
1c45607a JS |
688 | } else { |
689 | switch (info->rx_trigger) { | |
690 | case 1: | |
691 | fcr |= UART_FCR_TRIGGER_1; | |
692 | break; | |
693 | case 4: | |
694 | fcr |= UART_FCR_TRIGGER_4; | |
695 | break; | |
696 | case 8: | |
697 | fcr |= UART_FCR_TRIGGER_8; | |
698 | break; | |
699 | default: | |
700 | fcr |= UART_FCR_TRIGGER_14; | |
701 | break; | |
702 | } | |
1da177e4 | 703 | } |
1da177e4 LT |
704 | } |
705 | ||
1c45607a JS |
706 | /* CTS flow control flag and modem status interrupts */ |
707 | info->IER &= ~UART_IER_MSI; | |
708 | info->MCR &= ~UART_MCR_AFE; | |
709 | if (cflag & CRTSCTS) { | |
0ad9e7d1 | 710 | info->port.flags |= ASYNC_CTS_FLOW; |
1c45607a JS |
711 | info->IER |= UART_IER_MSI; |
712 | if ((info->type == PORT_16550A) || (info->board->chip_flag)) { | |
713 | info->MCR |= UART_MCR_AFE; | |
714 | } else { | |
715 | status = inb(info->ioaddr + UART_MSR); | |
216ba023 | 716 | if (tty->hw_stopped) { |
1c45607a | 717 | if (status & UART_MSR_CTS) { |
216ba023 | 718 | tty->hw_stopped = 0; |
1c45607a JS |
719 | if (info->type != PORT_16550A && |
720 | !info->board->chip_flag) { | |
721 | outb(info->IER & ~UART_IER_THRI, | |
722 | info->ioaddr + | |
723 | UART_IER); | |
724 | info->IER |= UART_IER_THRI; | |
725 | outb(info->IER, info->ioaddr + | |
726 | UART_IER); | |
727 | } | |
216ba023 | 728 | tty_wakeup(tty); |
1c45607a JS |
729 | } |
730 | } else { | |
731 | if (!(status & UART_MSR_CTS)) { | |
216ba023 | 732 | tty->hw_stopped = 1; |
1c45607a JS |
733 | if ((info->type != PORT_16550A) && |
734 | (!info->board->chip_flag)) { | |
735 | info->IER &= ~UART_IER_THRI; | |
736 | outb(info->IER, info->ioaddr + | |
737 | UART_IER); | |
738 | } | |
739 | } | |
740 | } | |
1da177e4 | 741 | } |
1c45607a | 742 | } else { |
0ad9e7d1 | 743 | info->port.flags &= ~ASYNC_CTS_FLOW; |
1c45607a JS |
744 | } |
745 | outb(info->MCR, info->ioaddr + UART_MCR); | |
746 | if (cflag & CLOCAL) { | |
0ad9e7d1 | 747 | info->port.flags &= ~ASYNC_CHECK_CD; |
1c45607a | 748 | } else { |
0ad9e7d1 | 749 | info->port.flags |= ASYNC_CHECK_CD; |
1c45607a JS |
750 | info->IER |= UART_IER_MSI; |
751 | } | |
752 | 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; | |
216ba023 | 758 | if (I_INPCK(tty)) |
1c45607a | 759 | info->read_status_mask |= UART_LSR_FE | UART_LSR_PE; |
216ba023 | 760 | if (I_BRKINT(tty) || I_PARMRK(tty)) |
1c45607a | 761 | info->read_status_mask |= UART_LSR_BI; |
1da177e4 | 762 | |
1c45607a | 763 | info->ignore_status_mask = 0; |
1da177e4 | 764 | |
216ba023 | 765 | if (I_IGNBRK(tty)) { |
1c45607a JS |
766 | info->ignore_status_mask |= UART_LSR_BI; |
767 | info->read_status_mask |= UART_LSR_BI; | |
8ea2c2ec | 768 | /* |
1c45607a JS |
769 | * If we're ignore parity and break indicators, ignore |
770 | * overruns too. (For real raw support). | |
8ea2c2ec | 771 | */ |
216ba023 | 772 | if (I_IGNPAR(tty)) { |
1c45607a JS |
773 | 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 | } | |
1da177e4 | 782 | } |
1c45607a | 783 | if (info->board->chip_flag) { |
216ba023 AC |
784 | 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)) { | |
148ff86b CH |
787 | mxser_enable_must_rx_software_flow_control( |
788 | info->ioaddr); | |
1c45607a | 789 | } else { |
148ff86b CH |
790 | mxser_disable_must_rx_software_flow_control( |
791 | info->ioaddr); | |
1da177e4 | 792 | } |
216ba023 | 793 | if (I_IXOFF(tty)) { |
148ff86b CH |
794 | mxser_enable_must_tx_software_flow_control( |
795 | info->ioaddr); | |
1c45607a | 796 | } else { |
148ff86b CH |
797 | mxser_disable_must_tx_software_flow_control( |
798 | info->ioaddr); | |
1da177e4 LT |
799 | } |
800 | } | |
1da177e4 | 801 | |
1da177e4 | 802 | |
1c45607a JS |
803 | outb(fcr, info->ioaddr + UART_FCR); /* set fcr */ |
804 | outb(cval, info->ioaddr + UART_LCR); | |
1da177e4 | 805 | |
1c45607a | 806 | return ret; |
1da177e4 LT |
807 | } |
808 | ||
216ba023 AC |
809 | static void mxser_check_modem_status(struct tty_struct *tty, |
810 | struct mxser_port *port, int status) | |
1da177e4 | 811 | { |
1c45607a JS |
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; | |
bdc04e31 | 822 | wake_up_interruptible(&port->port.delta_msr_wait); |
1da177e4 | 823 | |
0ad9e7d1 | 824 | if ((port->port.flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) { |
1c45607a | 825 | if (status & UART_MSR_DCD) |
0ad9e7d1 | 826 | wake_up_interruptible(&port->port.open_wait); |
1c45607a | 827 | } |
1da177e4 | 828 | |
0ad9e7d1 | 829 | if (port->port.flags & ASYNC_CTS_FLOW) { |
216ba023 | 830 | if (tty->hw_stopped) { |
1c45607a | 831 | if (status & UART_MSR_CTS) { |
216ba023 | 832 | tty->hw_stopped = 0; |
1c45607a JS |
833 | |
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 | } | |
216ba023 | 842 | tty_wakeup(tty); |
1c45607a JS |
843 | } |
844 | } else { | |
845 | if (!(status & UART_MSR_CTS)) { | |
216ba023 | 846 | tty->hw_stopped = 1; |
1c45607a JS |
847 | 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 | } | |
1da177e4 LT |
855 | } |
856 | } | |
857 | ||
6769140d | 858 | static int mxser_activate(struct tty_port *port, struct tty_struct *tty) |
1da177e4 | 859 | { |
6769140d | 860 | struct mxser_port *info = container_of(port, struct mxser_port, port); |
1c45607a JS |
861 | unsigned long page; |
862 | unsigned long flags; | |
1da177e4 | 863 | |
1c45607a JS |
864 | page = __get_free_page(GFP_KERNEL); |
865 | if (!page) | |
866 | return -ENOMEM; | |
1da177e4 | 867 | |
1c45607a | 868 | spin_lock_irqsave(&info->slock, flags); |
1da177e4 | 869 | |
1c45607a | 870 | if (!info->ioaddr || !info->type) { |
216ba023 | 871 | set_bit(TTY_IO_ERROR, &tty->flags); |
1c45607a JS |
872 | free_page(page); |
873 | spin_unlock_irqrestore(&info->slock, flags); | |
1da177e4 | 874 | return 0; |
1c45607a | 875 | } |
6769140d | 876 | info->port.xmit_buf = (unsigned char *) page; |
1da177e4 | 877 | |
1da177e4 | 878 | /* |
1c45607a JS |
879 | * Clear the FIFO buffers and disable them |
880 | * (they will be reenabled in mxser_change_speed()) | |
1da177e4 | 881 | */ |
1c45607a JS |
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); | |
1da177e4 | 889 | |
1c45607a JS |
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)) { | |
f43a510d | 898 | set_bit(TTY_IO_ERROR, &tty->flags); |
1c45607a JS |
899 | return 0; |
900 | } else | |
901 | return -ENODEV; | |
902 | } | |
1da177e4 | 903 | |
1c45607a JS |
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 | ||
216ba023 | 936 | clear_bit(TTY_IO_ERROR, &tty->flags); |
1c45607a JS |
937 | info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; |
938 | ||
939 | /* | |
940 | * and set the speed of the serial port | |
941 | */ | |
216ba023 | 942 | mxser_change_speed(tty, NULL); |
1c45607a JS |
943 | spin_unlock_irqrestore(&info->slock, flags); |
944 | ||
945 | return 0; | |
946 | } | |
947 | ||
948 | /* | |
6769140d | 949 | * This routine will shutdown a serial port |
1c45607a | 950 | */ |
6769140d | 951 | static void mxser_shutdown_port(struct tty_port *port) |
1c45607a | 952 | { |
6769140d | 953 | struct mxser_port *info = container_of(port, struct mxser_port, port); |
1c45607a JS |
954 | unsigned long flags; |
955 | ||
1c45607a JS |
956 | 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 | */ | |
bdc04e31 | 962 | wake_up_interruptible(&info->port.delta_msr_wait); |
1c45607a JS |
963 | |
964 | /* | |
6769140d | 965 | * Free the xmit buffer, if necessary |
1c45607a | 966 | */ |
0ad9e7d1 AC |
967 | if (info->port.xmit_buf) { |
968 | free_page((unsigned long) info->port.xmit_buf); | |
969 | info->port.xmit_buf = NULL; | |
1da177e4 LT |
970 | } |
971 | ||
1c45607a JS |
972 | info->IER = 0; |
973 | outb(0x00, info->ioaddr + UART_IER); | |
974 | ||
1c45607a JS |
975 | /* 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 | ||
1c45607a JS |
987 | |
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 | ||
994 | /* | |
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 | */ | |
1000 | static int mxser_open(struct tty_struct *tty, struct file *filp) | |
1001 | { | |
1002 | struct mxser_port *info; | |
6769140d | 1003 | int line; |
1c45607a JS |
1004 | |
1005 | line = tty->index; | |
1006 | if (line == MXSER_PORTS) | |
1007 | return 0; | |
1008 | if (line < 0 || line > MXSER_PORTS) | |
1009 | return -ENODEV; | |
1010 | info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD]; | |
1011 | if (!info->ioaddr) | |
1012 | return -ENODEV; | |
1013 | ||
6769140d | 1014 | return tty_port_open(&info->port, tty, filp); |
1da177e4 LT |
1015 | } |
1016 | ||
978e595f AC |
1017 | static void mxser_flush_buffer(struct tty_struct *tty) |
1018 | { | |
1019 | struct mxser_port *info = tty->driver_data; | |
1020 | char fcr; | |
1021 | unsigned long flags; | |
1022 | ||
1023 | ||
1024 | spin_lock_irqsave(&info->slock, flags); | |
1025 | info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; | |
1026 | ||
1027 | fcr = inb(info->ioaddr + UART_FCR); | |
1028 | outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT), | |
1029 | info->ioaddr + UART_FCR); | |
1030 | outb(fcr, info->ioaddr + UART_FCR); | |
1031 | ||
1032 | spin_unlock_irqrestore(&info->slock, flags); | |
1033 | ||
1034 | tty_wakeup(tty); | |
1035 | } | |
1036 | ||
1037 | ||
6769140d | 1038 | static void mxser_close_port(struct tty_port *port) |
1da177e4 | 1039 | { |
1e2b0254 | 1040 | struct mxser_port *info = container_of(port, struct mxser_port, port); |
1da177e4 | 1041 | unsigned long timeout; |
1da177e4 LT |
1042 | /* |
1043 | * At this point we stop accepting input. To do this, we | |
1044 | * disable the receive line status interrupts, and tell the | |
1045 | * interrupt driver to stop checking the data ready bit in the | |
1046 | * line status register. | |
1047 | */ | |
1048 | info->IER &= ~UART_IER_RLSI; | |
1c45607a | 1049 | if (info->board->chip_flag) |
1da177e4 | 1050 | info->IER &= ~MOXA_MUST_RECV_ISR; |
1c45607a | 1051 | |
6769140d AC |
1052 | outb(info->IER, info->ioaddr + UART_IER); |
1053 | /* | |
1054 | * Before we drop DTR, make sure the UART transmitter | |
1055 | * has completely drained; this is especially | |
1056 | * important if there is a transmit FIFO! | |
1057 | */ | |
1058 | timeout = jiffies + HZ; | |
1059 | while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) { | |
1060 | schedule_timeout_interruptible(5); | |
1061 | if (time_after(jiffies, timeout)) | |
1062 | break; | |
1da177e4 | 1063 | } |
1e2b0254 AC |
1064 | } |
1065 | ||
1066 | /* | |
1067 | * This routine is called when the serial port gets closed. First, we | |
1068 | * wait for the last remaining data to be sent. Then, we unlink its | |
1069 | * async structure from the interrupt chain if necessary, and we free | |
1070 | * that IRQ if nothing is left in the chain. | |
1071 | */ | |
1072 | static void mxser_close(struct tty_struct *tty, struct file *filp) | |
1073 | { | |
1074 | struct mxser_port *info = tty->driver_data; | |
1075 | struct tty_port *port = &info->port; | |
1076 | ||
1077 | if (tty->index == MXSER_PORTS) | |
1078 | return; | |
1079 | if (tty_port_close_start(port, tty, filp) == 0) | |
1080 | return; | |
6769140d AC |
1081 | mutex_lock(&port->mutex); |
1082 | mxser_close_port(port); | |
1e2b0254 | 1083 | mxser_flush_buffer(tty); |
6769140d AC |
1084 | mxser_shutdown_port(port); |
1085 | clear_bit(ASYNCB_INITIALIZED, &port->flags); | |
1086 | mutex_unlock(&port->mutex); | |
a6614999 AC |
1087 | /* Right now the tty_port set is done outside of the close_end helper |
1088 | as we don't yet have everyone using refcounts */ | |
1089 | tty_port_close_end(port, tty); | |
1090 | tty_port_tty_set(port, NULL); | |
1da177e4 LT |
1091 | } |
1092 | ||
1093 | static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count) | |
1094 | { | |
1095 | int c, total = 0; | |
1c45607a | 1096 | struct mxser_port *info = tty->driver_data; |
1da177e4 LT |
1097 | unsigned long flags; |
1098 | ||
0ad9e7d1 | 1099 | if (!info->port.xmit_buf) |
8ea2c2ec | 1100 | return 0; |
1da177e4 LT |
1101 | |
1102 | while (1) { | |
8ea2c2ec JJ |
1103 | c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1, |
1104 | SERIAL_XMIT_SIZE - info->xmit_head)); | |
1da177e4 LT |
1105 | if (c <= 0) |
1106 | break; | |
1107 | ||
0ad9e7d1 | 1108 | memcpy(info->port.xmit_buf + info->xmit_head, buf, c); |
1da177e4 | 1109 | spin_lock_irqsave(&info->slock, flags); |
8ea2c2ec JJ |
1110 | info->xmit_head = (info->xmit_head + c) & |
1111 | (SERIAL_XMIT_SIZE - 1); | |
1da177e4 LT |
1112 | info->xmit_cnt += c; |
1113 | spin_unlock_irqrestore(&info->slock, flags); | |
1114 | ||
1115 | buf += c; | |
1116 | count -= c; | |
1117 | total += c; | |
1da177e4 LT |
1118 | } |
1119 | ||
1c45607a | 1120 | if (info->xmit_cnt && !tty->stopped) { |
8ea2c2ec JJ |
1121 | if (!tty->hw_stopped || |
1122 | (info->type == PORT_16550A) || | |
1c45607a | 1123 | (info->board->chip_flag)) { |
1da177e4 | 1124 | spin_lock_irqsave(&info->slock, flags); |
1c45607a JS |
1125 | outb(info->IER & ~UART_IER_THRI, info->ioaddr + |
1126 | UART_IER); | |
1da177e4 | 1127 | info->IER |= UART_IER_THRI; |
1c45607a | 1128 | outb(info->IER, info->ioaddr + UART_IER); |
1da177e4 LT |
1129 | spin_unlock_irqrestore(&info->slock, flags); |
1130 | } | |
1131 | } | |
1132 | return total; | |
1133 | } | |
1134 | ||
0be2eade | 1135 | static int mxser_put_char(struct tty_struct *tty, unsigned char ch) |
1da177e4 | 1136 | { |
1c45607a | 1137 | struct mxser_port *info = tty->driver_data; |
1da177e4 LT |
1138 | unsigned long flags; |
1139 | ||
0ad9e7d1 | 1140 | if (!info->port.xmit_buf) |
0be2eade | 1141 | return 0; |
1da177e4 LT |
1142 | |
1143 | if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1) | |
0be2eade | 1144 | return 0; |
1da177e4 LT |
1145 | |
1146 | spin_lock_irqsave(&info->slock, flags); | |
0ad9e7d1 | 1147 | info->port.xmit_buf[info->xmit_head++] = ch; |
1da177e4 LT |
1148 | info->xmit_head &= SERIAL_XMIT_SIZE - 1; |
1149 | info->xmit_cnt++; | |
1150 | spin_unlock_irqrestore(&info->slock, flags); | |
1c45607a | 1151 | if (!tty->stopped) { |
8ea2c2ec JJ |
1152 | if (!tty->hw_stopped || |
1153 | (info->type == PORT_16550A) || | |
1c45607a | 1154 | info->board->chip_flag) { |
1da177e4 | 1155 | spin_lock_irqsave(&info->slock, flags); |
1c45607a | 1156 | outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER); |
1da177e4 | 1157 | info->IER |= UART_IER_THRI; |
1c45607a | 1158 | outb(info->IER, info->ioaddr + UART_IER); |
1da177e4 LT |
1159 | spin_unlock_irqrestore(&info->slock, flags); |
1160 | } | |
1161 | } | |
0be2eade | 1162 | return 1; |
1da177e4 LT |
1163 | } |
1164 | ||
1165 | ||
1166 | static void mxser_flush_chars(struct tty_struct *tty) | |
1167 | { | |
1c45607a | 1168 | struct mxser_port *info = tty->driver_data; |
1da177e4 LT |
1169 | unsigned long flags; |
1170 | ||
ace7dd96 JS |
1171 | if (info->xmit_cnt <= 0 || tty->stopped || !info->port.xmit_buf || |
1172 | (tty->hw_stopped && info->type != PORT_16550A && | |
1173 | !info->board->chip_flag)) | |
1da177e4 LT |
1174 | return; |
1175 | ||
1176 | spin_lock_irqsave(&info->slock, flags); | |
1177 | ||
1c45607a | 1178 | outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER); |
1da177e4 | 1179 | info->IER |= UART_IER_THRI; |
1c45607a | 1180 | outb(info->IER, info->ioaddr + UART_IER); |
1da177e4 LT |
1181 | |
1182 | spin_unlock_irqrestore(&info->slock, flags); | |
1183 | } | |
1184 | ||
1185 | static int mxser_write_room(struct tty_struct *tty) | |
1186 | { | |
1c45607a | 1187 | struct mxser_port *info = tty->driver_data; |
1da177e4 LT |
1188 | int ret; |
1189 | ||
1190 | ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1; | |
ace7dd96 | 1191 | return ret < 0 ? 0 : ret; |
1da177e4 LT |
1192 | } |
1193 | ||
1194 | static int mxser_chars_in_buffer(struct tty_struct *tty) | |
1195 | { | |
1c45607a | 1196 | struct mxser_port *info = tty->driver_data; |
1da177e4 LT |
1197 | return info->xmit_cnt; |
1198 | } | |
1199 | ||
1c45607a JS |
1200 | /* |
1201 | * ------------------------------------------------------------ | |
1202 | * friends of mxser_ioctl() | |
1203 | * ------------------------------------------------------------ | |
1204 | */ | |
216ba023 | 1205 | static int mxser_get_serial_info(struct tty_struct *tty, |
1c45607a JS |
1206 | struct serial_struct __user *retinfo) |
1207 | { | |
216ba023 | 1208 | struct mxser_port *info = tty->driver_data; |
1c45607a JS |
1209 | struct serial_struct tmp = { |
1210 | .type = info->type, | |
216ba023 | 1211 | .line = tty->index, |
1c45607a JS |
1212 | .port = info->ioaddr, |
1213 | .irq = info->board->irq, | |
0ad9e7d1 | 1214 | .flags = info->port.flags, |
1c45607a | 1215 | .baud_base = info->baud_base, |
44b7d1b3 AC |
1216 | .close_delay = info->port.close_delay, |
1217 | .closing_wait = info->port.closing_wait, | |
1c45607a JS |
1218 | .custom_divisor = info->custom_divisor, |
1219 | .hub6 = 0 | |
1220 | }; | |
1221 | if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) | |
1222 | return -EFAULT; | |
1223 | return 0; | |
1224 | } | |
1225 | ||
216ba023 | 1226 | static int mxser_set_serial_info(struct tty_struct *tty, |
1c45607a | 1227 | struct serial_struct __user *new_info) |
1da177e4 | 1228 | { |
216ba023 | 1229 | struct mxser_port *info = tty->driver_data; |
07f86c03 | 1230 | struct tty_port *port = &info->port; |
1c45607a | 1231 | struct serial_struct new_serial; |
80ff8a80 | 1232 | speed_t baud; |
1c45607a JS |
1233 | unsigned long sl_flags; |
1234 | unsigned int flags; | |
1235 | int retval = 0; | |
1da177e4 | 1236 | |
1c45607a | 1237 | if (!new_info || !info->ioaddr) |
80ff8a80 | 1238 | return -ENODEV; |
1c45607a JS |
1239 | if (copy_from_user(&new_serial, new_info, sizeof(new_serial))) |
1240 | return -EFAULT; | |
1da177e4 | 1241 | |
80ff8a80 JS |
1242 | if (new_serial.irq != info->board->irq || |
1243 | new_serial.port != info->ioaddr) | |
1244 | return -EINVAL; | |
1da177e4 | 1245 | |
07f86c03 | 1246 | flags = port->flags & ASYNC_SPD_MASK; |
1da177e4 | 1247 | |
1c45607a JS |
1248 | if (!capable(CAP_SYS_ADMIN)) { |
1249 | if ((new_serial.baud_base != info->baud_base) || | |
44b7d1b3 | 1250 | (new_serial.close_delay != info->port.close_delay) || |
0ad9e7d1 | 1251 | ((new_serial.flags & ~ASYNC_USR_MASK) != (info->port.flags & ~ASYNC_USR_MASK))) |
1c45607a | 1252 | return -EPERM; |
0ad9e7d1 | 1253 | info->port.flags = ((info->port.flags & ~ASYNC_USR_MASK) | |
1c45607a JS |
1254 | (new_serial.flags & ASYNC_USR_MASK)); |
1255 | } else { | |
1da177e4 | 1256 | /* |
1c45607a JS |
1257 | * OK, past this point, all the error checking has been done. |
1258 | * At this point, we start making changes..... | |
1da177e4 | 1259 | */ |
07f86c03 | 1260 | port->flags = ((port->flags & ~ASYNC_FLAGS) | |
1c45607a | 1261 | (new_serial.flags & ASYNC_FLAGS)); |
07f86c03 AC |
1262 | port->close_delay = new_serial.close_delay * HZ / 100; |
1263 | port->closing_wait = new_serial.closing_wait * HZ / 100; | |
1264 | tty->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0; | |
1265 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST && | |
80ff8a80 JS |
1266 | (new_serial.baud_base != info->baud_base || |
1267 | new_serial.custom_divisor != | |
1268 | info->custom_divisor)) { | |
07f86c03 AC |
1269 | if (new_serial.custom_divisor == 0) |
1270 | return -EINVAL; | |
80ff8a80 | 1271 | baud = new_serial.baud_base / new_serial.custom_divisor; |
216ba023 | 1272 | tty_encode_baud_rate(tty, baud, baud); |
80ff8a80 | 1273 | } |
1c45607a | 1274 | } |
fc83815c | 1275 | |
1c45607a | 1276 | info->type = new_serial.type; |
1da177e4 | 1277 | |
1c45607a JS |
1278 | process_txrx_fifo(info); |
1279 | ||
07f86c03 AC |
1280 | if (test_bit(ASYNCB_INITIALIZED, &port->flags)) { |
1281 | if (flags != (port->flags & ASYNC_SPD_MASK)) { | |
1c45607a | 1282 | spin_lock_irqsave(&info->slock, sl_flags); |
216ba023 | 1283 | mxser_change_speed(tty, NULL); |
1c45607a | 1284 | spin_unlock_irqrestore(&info->slock, sl_flags); |
1da177e4 | 1285 | } |
6769140d | 1286 | } else { |
07f86c03 | 1287 | retval = mxser_activate(port, tty); |
6769140d | 1288 | if (retval == 0) |
07f86c03 | 1289 | set_bit(ASYNCB_INITIALIZED, &port->flags); |
6769140d | 1290 | } |
1c45607a JS |
1291 | return retval; |
1292 | } | |
1da177e4 | 1293 | |
1c45607a JS |
1294 | /* |
1295 | * mxser_get_lsr_info - get line status register info | |
1296 | * | |
1297 | * Purpose: Let user call ioctl() to get info when the UART physically | |
1298 | * is emptied. On bus types like RS485, the transmitter must | |
1299 | * release the bus after transmitting. This must be done when | |
1300 | * the transmit shift register is empty, not be done when the | |
1301 | * transmit holding register is empty. This functionality | |
1302 | * allows an RS485 driver to be written in user space. | |
1303 | */ | |
1304 | static int mxser_get_lsr_info(struct mxser_port *info, | |
1305 | unsigned int __user *value) | |
1306 | { | |
1307 | unsigned char status; | |
1308 | unsigned int result; | |
1309 | unsigned long flags; | |
1da177e4 | 1310 | |
1c45607a JS |
1311 | spin_lock_irqsave(&info->slock, flags); |
1312 | status = inb(info->ioaddr + UART_LSR); | |
1313 | spin_unlock_irqrestore(&info->slock, flags); | |
1314 | result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0); | |
1315 | return put_user(result, value); | |
1316 | } | |
1da177e4 | 1317 | |
1c45607a JS |
1318 | static int mxser_tiocmget(struct tty_struct *tty, struct file *file) |
1319 | { | |
1320 | struct mxser_port *info = tty->driver_data; | |
1321 | unsigned char control, status; | |
1322 | unsigned long flags; | |
1da177e4 | 1323 | |
8ea2c2ec | 1324 | |
1c45607a JS |
1325 | if (tty->index == MXSER_PORTS) |
1326 | return -ENOIOCTLCMD; | |
1327 | if (test_bit(TTY_IO_ERROR, &tty->flags)) | |
1328 | return -EIO; | |
1da177e4 | 1329 | |
1c45607a | 1330 | control = info->MCR; |
1da177e4 | 1331 | |
1c45607a JS |
1332 | spin_lock_irqsave(&info->slock, flags); |
1333 | status = inb(info->ioaddr + UART_MSR); | |
1334 | if (status & UART_MSR_ANY_DELTA) | |
216ba023 | 1335 | mxser_check_modem_status(tty, info, status); |
1c45607a JS |
1336 | spin_unlock_irqrestore(&info->slock, flags); |
1337 | return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) | | |
1338 | ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) | | |
1339 | ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) | | |
1340 | ((status & UART_MSR_RI) ? TIOCM_RNG : 0) | | |
1341 | ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) | | |
1342 | ((status & UART_MSR_CTS) ? TIOCM_CTS : 0); | |
1343 | } | |
1da177e4 | 1344 | |
1c45607a JS |
1345 | static int mxser_tiocmset(struct tty_struct *tty, struct file *file, |
1346 | unsigned int set, unsigned int clear) | |
1347 | { | |
1348 | struct mxser_port *info = tty->driver_data; | |
1349 | unsigned long flags; | |
1da177e4 | 1350 | |
1da177e4 | 1351 | |
1c45607a JS |
1352 | if (tty->index == MXSER_PORTS) |
1353 | return -ENOIOCTLCMD; | |
1354 | if (test_bit(TTY_IO_ERROR, &tty->flags)) | |
1355 | return -EIO; | |
1da177e4 | 1356 | |
1c45607a | 1357 | spin_lock_irqsave(&info->slock, flags); |
1da177e4 | 1358 | |
1c45607a JS |
1359 | if (set & TIOCM_RTS) |
1360 | info->MCR |= UART_MCR_RTS; | |
1361 | if (set & TIOCM_DTR) | |
1362 | info->MCR |= UART_MCR_DTR; | |
1da177e4 | 1363 | |
1c45607a JS |
1364 | if (clear & TIOCM_RTS) |
1365 | info->MCR &= ~UART_MCR_RTS; | |
1366 | if (clear & TIOCM_DTR) | |
1367 | info->MCR &= ~UART_MCR_DTR; | |
8ea2c2ec | 1368 | |
1c45607a JS |
1369 | outb(info->MCR, info->ioaddr + UART_MCR); |
1370 | spin_unlock_irqrestore(&info->slock, flags); | |
1371 | return 0; | |
1372 | } | |
1da177e4 | 1373 | |
1c45607a JS |
1374 | static int __init mxser_program_mode(int port) |
1375 | { | |
1376 | int id, i, j, n; | |
1377 | ||
1378 | outb(0, port); | |
1379 | outb(0, port); | |
1380 | outb(0, port); | |
1381 | (void)inb(port); | |
1382 | (void)inb(port); | |
1383 | outb(0, port); | |
1384 | (void)inb(port); | |
1385 | ||
1386 | id = inb(port + 1) & 0x1F; | |
1387 | if ((id != C168_ASIC_ID) && | |
1388 | (id != C104_ASIC_ID) && | |
1389 | (id != C102_ASIC_ID) && | |
1390 | (id != CI132_ASIC_ID) && | |
1391 | (id != CI134_ASIC_ID) && | |
1392 | (id != CI104J_ASIC_ID)) | |
1393 | return -1; | |
1394 | for (i = 0, j = 0; i < 4; i++) { | |
1395 | n = inb(port + 2); | |
1396 | if (n == 'M') { | |
1397 | j = 1; | |
1398 | } else if ((j == 1) && (n == 1)) { | |
1399 | j = 2; | |
1400 | break; | |
1401 | } else | |
1402 | j = 0; | |
1da177e4 | 1403 | } |
1c45607a JS |
1404 | if (j != 2) |
1405 | id = -2; | |
1406 | return id; | |
1da177e4 LT |
1407 | } |
1408 | ||
1c45607a JS |
1409 | static void __init mxser_normal_mode(int port) |
1410 | { | |
1411 | int i, n; | |
1412 | ||
1413 | outb(0xA5, port + 1); | |
1414 | outb(0x80, port + 3); | |
1415 | outb(12, port + 0); /* 9600 bps */ | |
1416 | outb(0, port + 1); | |
1417 | outb(0x03, port + 3); /* 8 data bits */ | |
1418 | outb(0x13, port + 4); /* loop back mode */ | |
1419 | for (i = 0; i < 16; i++) { | |
1420 | n = inb(port + 5); | |
1421 | if ((n & 0x61) == 0x60) | |
1422 | break; | |
1423 | if ((n & 1) == 1) | |
1424 | (void)inb(port); | |
1425 | } | |
1426 | outb(0x00, port + 4); | |
1427 | } | |
1428 | ||
1429 | #define CHIP_SK 0x01 /* Serial Data Clock in Eprom */ | |
1430 | #define CHIP_DO 0x02 /* Serial Data Output in Eprom */ | |
1431 | #define CHIP_CS 0x04 /* Serial Chip Select in Eprom */ | |
1432 | #define CHIP_DI 0x08 /* Serial Data Input in Eprom */ | |
1433 | #define EN_CCMD 0x000 /* Chip's command register */ | |
1434 | #define EN0_RSARLO 0x008 /* Remote start address reg 0 */ | |
1435 | #define EN0_RSARHI 0x009 /* Remote start address reg 1 */ | |
1436 | #define EN0_RCNTLO 0x00A /* Remote byte count reg WR */ | |
1437 | #define EN0_RCNTHI 0x00B /* Remote byte count reg WR */ | |
1438 | #define EN0_DCFG 0x00E /* Data configuration reg WR */ | |
1439 | #define EN0_PORT 0x010 /* Rcv missed frame error counter RD */ | |
1440 | #define ENC_PAGE0 0x000 /* Select page 0 of chip registers */ | |
1441 | #define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */ | |
1442 | static int __init mxser_read_register(int port, unsigned short *regs) | |
1443 | { | |
1444 | int i, k, value, id; | |
1445 | unsigned int j; | |
1446 | ||
1447 | id = mxser_program_mode(port); | |
1448 | if (id < 0) | |
1449 | return id; | |
1450 | for (i = 0; i < 14; i++) { | |
1451 | k = (i & 0x3F) | 0x180; | |
1452 | for (j = 0x100; j > 0; j >>= 1) { | |
1453 | outb(CHIP_CS, port); | |
1454 | if (k & j) { | |
1455 | outb(CHIP_CS | CHIP_DO, port); | |
1456 | outb(CHIP_CS | CHIP_DO | CHIP_SK, port); /* A? bit of read */ | |
1457 | } else { | |
1458 | outb(CHIP_CS, port); | |
1459 | outb(CHIP_CS | CHIP_SK, port); /* A? bit of read */ | |
1460 | } | |
1461 | } | |
1462 | (void)inb(port); | |
1463 | value = 0; | |
1464 | for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) { | |
1465 | outb(CHIP_CS, port); | |
1466 | outb(CHIP_CS | CHIP_SK, port); | |
1467 | if (inb(port) & CHIP_DI) | |
1468 | value |= j; | |
1469 | } | |
1470 | regs[i] = value; | |
1471 | outb(0, port); | |
1472 | } | |
1473 | mxser_normal_mode(port); | |
1474 | return id; | |
1475 | } | |
1da177e4 LT |
1476 | |
1477 | static int mxser_ioctl_special(unsigned int cmd, void __user *argp) | |
1478 | { | |
07f86c03 AC |
1479 | struct mxser_port *ip; |
1480 | struct tty_port *port; | |
216ba023 | 1481 | struct tty_struct *tty; |
1c45607a JS |
1482 | int result, status; |
1483 | unsigned int i, j; | |
9d6d162d | 1484 | int ret = 0; |
1da177e4 LT |
1485 | |
1486 | switch (cmd) { | |
1da177e4 | 1487 | case MOXA_GET_MAJOR: |
8f3d137e JS |
1488 | if (printk_ratelimit()) |
1489 | printk(KERN_WARNING "mxser: '%s' uses deprecated ioctl " | |
1490 | "%x (GET_MAJOR), fix your userspace\n", | |
1491 | current->comm, cmd); | |
1c45607a | 1492 | return put_user(ttymajor, (int __user *)argp); |
1da177e4 LT |
1493 | |
1494 | case MOXA_CHKPORTENABLE: | |
1495 | result = 0; | |
1c45607a JS |
1496 | for (i = 0; i < MXSER_BOARDS; i++) |
1497 | for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) | |
1498 | if (mxser_boards[i].ports[j].ioaddr) | |
1499 | result |= (1 << i); | |
8ea2c2ec | 1500 | return put_user(result, (unsigned long __user *)argp); |
1da177e4 | 1501 | case MOXA_GETDATACOUNT: |
07f86c03 AC |
1502 | /* The receive side is locked by port->slock but it isn't |
1503 | clear that an exact snapshot is worth copying here */ | |
1da177e4 | 1504 | if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log))) |
9d6d162d | 1505 | ret = -EFAULT; |
9d6d162d | 1506 | return ret; |
72800df9 JS |
1507 | case MOXA_GETMSTATUS: { |
1508 | struct mxser_mstatus ms, __user *msu = argp; | |
1c45607a JS |
1509 | for (i = 0; i < MXSER_BOARDS; i++) |
1510 | for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) { | |
07f86c03 AC |
1511 | ip = &mxser_boards[i].ports[j]; |
1512 | port = &ip->port; | |
72800df9 | 1513 | memset(&ms, 0, sizeof(ms)); |
1c45607a | 1514 | |
07f86c03 AC |
1515 | mutex_lock(&port->mutex); |
1516 | if (!ip->ioaddr) | |
72800df9 | 1517 | goto copy; |
216ba023 | 1518 | |
07f86c03 | 1519 | tty = tty_port_tty_get(port); |
1da177e4 | 1520 | |
216ba023 | 1521 | if (!tty || !tty->termios) |
07f86c03 | 1522 | ms.cflag = ip->normal_termios.c_cflag; |
1c45607a | 1523 | else |
216ba023 AC |
1524 | ms.cflag = tty->termios->c_cflag; |
1525 | tty_kref_put(tty); | |
07f86c03 AC |
1526 | spin_lock_irq(&ip->slock); |
1527 | status = inb(ip->ioaddr + UART_MSR); | |
1528 | spin_unlock_irq(&ip->slock); | |
72800df9 JS |
1529 | if (status & UART_MSR_DCD) |
1530 | ms.dcd = 1; | |
1531 | if (status & UART_MSR_DSR) | |
1532 | ms.dsr = 1; | |
1533 | if (status & UART_MSR_CTS) | |
1534 | ms.cts = 1; | |
1535 | copy: | |
07f86c03 AC |
1536 | mutex_unlock(&port->mutex); |
1537 | if (copy_to_user(msu, &ms, sizeof(ms))) | |
72800df9 | 1538 | return -EFAULT; |
72800df9 | 1539 | msu++; |
1c45607a | 1540 | } |
1da177e4 | 1541 | return 0; |
72800df9 | 1542 | } |
8ea2c2ec | 1543 | case MOXA_ASPP_MON_EXT: { |
72800df9 JS |
1544 | struct mxser_mon_ext *me; /* it's 2k, stack unfriendly */ |
1545 | unsigned int cflag, iflag, p; | |
1546 | u8 opmode; | |
1547 | ||
1548 | me = kzalloc(sizeof(*me), GFP_KERNEL); | |
1549 | if (!me) | |
1550 | return -ENOMEM; | |
1c45607a | 1551 | |
72800df9 JS |
1552 | for (i = 0, p = 0; i < MXSER_BOARDS; i++) { |
1553 | for (j = 0; j < MXSER_PORTS_PER_BOARD; j++, p++) { | |
1554 | if (p >= ARRAY_SIZE(me->rx_cnt)) { | |
1555 | i = MXSER_BOARDS; | |
1556 | break; | |
1557 | } | |
07f86c03 AC |
1558 | ip = &mxser_boards[i].ports[j]; |
1559 | port = &ip->port; | |
1560 | ||
1561 | mutex_lock(&port->mutex); | |
1562 | if (!ip->ioaddr) { | |
1563 | mutex_unlock(&port->mutex); | |
1da177e4 | 1564 | continue; |
07f86c03 | 1565 | } |
1da177e4 | 1566 | |
07f86c03 AC |
1567 | spin_lock_irq(&ip->slock); |
1568 | status = mxser_get_msr(ip->ioaddr, 0, p); | |
1c45607a | 1569 | |
1da177e4 | 1570 | if (status & UART_MSR_TERI) |
07f86c03 | 1571 | ip->icount.rng++; |
1da177e4 | 1572 | if (status & UART_MSR_DDSR) |
07f86c03 | 1573 | ip->icount.dsr++; |
1da177e4 | 1574 | if (status & UART_MSR_DDCD) |
07f86c03 | 1575 | ip->icount.dcd++; |
1da177e4 | 1576 | if (status & UART_MSR_DCTS) |
07f86c03 | 1577 | ip->icount.cts++; |
1c45607a | 1578 | |
07f86c03 AC |
1579 | ip->mon_data.modem_status = status; |
1580 | me->rx_cnt[p] = ip->mon_data.rxcnt; | |
1581 | me->tx_cnt[p] = ip->mon_data.txcnt; | |
1582 | me->up_rxcnt[p] = ip->mon_data.up_rxcnt; | |
1583 | me->up_txcnt[p] = ip->mon_data.up_txcnt; | |
72800df9 | 1584 | me->modem_status[p] = |
07f86c03 AC |
1585 | ip->mon_data.modem_status; |
1586 | spin_unlock_irq(&ip->slock); | |
1587 | ||
1588 | tty = tty_port_tty_get(&ip->port); | |
1c45607a | 1589 | |
216ba023 | 1590 | if (!tty || !tty->termios) { |
07f86c03 AC |
1591 | cflag = ip->normal_termios.c_cflag; |
1592 | iflag = ip->normal_termios.c_iflag; | |
1593 | me->baudrate[p] = tty_termios_baud_rate(&ip->normal_termios); | |
1da177e4 | 1594 | } else { |
216ba023 AC |
1595 | cflag = tty->termios->c_cflag; |
1596 | iflag = tty->termios->c_iflag; | |
1597 | me->baudrate[p] = tty_get_baud_rate(tty); | |
1da177e4 | 1598 | } |
216ba023 | 1599 | tty_kref_put(tty); |
1da177e4 | 1600 | |
72800df9 JS |
1601 | me->databits[p] = cflag & CSIZE; |
1602 | me->stopbits[p] = cflag & CSTOPB; | |
1603 | me->parity[p] = cflag & (PARENB | PARODD | | |
1604 | CMSPAR); | |
1da177e4 LT |
1605 | |
1606 | if (cflag & CRTSCTS) | |
72800df9 | 1607 | me->flowctrl[p] |= 0x03; |
1da177e4 LT |
1608 | |
1609 | if (iflag & (IXON | IXOFF)) | |
72800df9 | 1610 | me->flowctrl[p] |= 0x0C; |
1da177e4 | 1611 | |
07f86c03 | 1612 | if (ip->type == PORT_16550A) |
72800df9 | 1613 | me->fifo[p] = 1; |
1da177e4 | 1614 | |
07f86c03 | 1615 | opmode = inb(ip->opmode_ioaddr)>>((p % 4) * 2); |
1da177e4 | 1616 | opmode &= OP_MODE_MASK; |
72800df9 | 1617 | me->iftype[p] = opmode; |
07f86c03 | 1618 | mutex_unlock(&port->mutex); |
1da177e4 | 1619 | } |
9d6d162d | 1620 | } |
72800df9 JS |
1621 | if (copy_to_user(argp, me, sizeof(*me))) |
1622 | ret = -EFAULT; | |
1623 | kfree(me); | |
1624 | return ret; | |
9d6d162d AC |
1625 | } |
1626 | default: | |
1da177e4 LT |
1627 | return -ENOIOCTLCMD; |
1628 | } | |
1629 | return 0; | |
1630 | } | |
1631 | ||
1c45607a JS |
1632 | static int mxser_cflags_changed(struct mxser_port *info, unsigned long arg, |
1633 | struct async_icount *cprev) | |
1da177e4 | 1634 | { |
1c45607a JS |
1635 | struct async_icount cnow; |
1636 | unsigned long flags; | |
1637 | int ret; | |
1da177e4 | 1638 | |
1c45607a JS |
1639 | spin_lock_irqsave(&info->slock, flags); |
1640 | cnow = info->icount; /* atomic copy */ | |
1641 | spin_unlock_irqrestore(&info->slock, flags); | |
1da177e4 | 1642 | |
1c45607a JS |
1643 | ret = ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) || |
1644 | ((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) || | |
1645 | ((arg & TIOCM_CD) && (cnow.dcd != cprev->dcd)) || | |
1646 | ((arg & TIOCM_CTS) && (cnow.cts != cprev->cts)); | |
1da177e4 | 1647 | |
1c45607a JS |
1648 | *cprev = cnow; |
1649 | ||
1650 | return ret; | |
1651 | } | |
1652 | ||
1653 | static int mxser_ioctl(struct tty_struct *tty, struct file *file, | |
1654 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1655 | { |
1c45607a | 1656 | struct mxser_port *info = tty->driver_data; |
07f86c03 | 1657 | struct tty_port *port = &info->port; |
1c45607a | 1658 | struct async_icount cnow; |
1c45607a JS |
1659 | unsigned long flags; |
1660 | void __user *argp = (void __user *)arg; | |
1661 | int retval; | |
1da177e4 | 1662 | |
1c45607a JS |
1663 | if (tty->index == MXSER_PORTS) |
1664 | return mxser_ioctl_special(cmd, argp); | |
1da177e4 | 1665 | |
1c45607a JS |
1666 | if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) { |
1667 | int p; | |
1668 | unsigned long opmode; | |
1669 | static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f }; | |
1670 | int shiftbit; | |
1671 | unsigned char val, mask; | |
1da177e4 | 1672 | |
1c45607a JS |
1673 | p = tty->index % 4; |
1674 | if (cmd == MOXA_SET_OP_MODE) { | |
1675 | if (get_user(opmode, (int __user *) argp)) | |
1676 | return -EFAULT; | |
1677 | if (opmode != RS232_MODE && | |
1678 | opmode != RS485_2WIRE_MODE && | |
1679 | opmode != RS422_MODE && | |
1680 | opmode != RS485_4WIRE_MODE) | |
1681 | return -EFAULT; | |
1682 | mask = ModeMask[p]; | |
1683 | shiftbit = p * 2; | |
07f86c03 | 1684 | spin_lock_irq(&info->slock); |
1c45607a JS |
1685 | val = inb(info->opmode_ioaddr); |
1686 | val &= mask; | |
1687 | val |= (opmode << shiftbit); | |
1688 | outb(val, info->opmode_ioaddr); | |
07f86c03 | 1689 | spin_unlock_irq(&info->slock); |
1c45607a JS |
1690 | } else { |
1691 | shiftbit = p * 2; | |
07f86c03 | 1692 | spin_lock_irq(&info->slock); |
1c45607a | 1693 | opmode = inb(info->opmode_ioaddr) >> shiftbit; |
07f86c03 | 1694 | spin_unlock_irq(&info->slock); |
1c45607a JS |
1695 | opmode &= OP_MODE_MASK; |
1696 | if (put_user(opmode, (int __user *)argp)) | |
1697 | return -EFAULT; | |
1698 | } | |
1699 | return 0; | |
1700 | } | |
1701 | ||
1702 | if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT && cmd != TIOCGICOUNT && | |
1703 | test_bit(TTY_IO_ERROR, &tty->flags)) | |
1704 | return -EIO; | |
1705 | ||
1706 | switch (cmd) { | |
1c45607a | 1707 | case TIOCGSERIAL: |
07f86c03 | 1708 | mutex_lock(&port->mutex); |
216ba023 | 1709 | retval = mxser_get_serial_info(tty, argp); |
07f86c03 | 1710 | mutex_unlock(&port->mutex); |
9d6d162d | 1711 | return retval; |
1c45607a | 1712 | case TIOCSSERIAL: |
07f86c03 | 1713 | mutex_lock(&port->mutex); |
216ba023 | 1714 | retval = mxser_set_serial_info(tty, argp); |
07f86c03 | 1715 | mutex_unlock(&port->mutex); |
9d6d162d | 1716 | return retval; |
1c45607a | 1717 | case TIOCSERGETLSR: /* Get line status register */ |
9d6d162d | 1718 | return mxser_get_lsr_info(info, argp); |
1c45607a JS |
1719 | /* |
1720 | * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change | |
1721 | * - mask passed in arg for lines of interest | |
1722 | * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) | |
1723 | * Caller should use TIOCGICOUNT to see which one it was | |
1724 | */ | |
1725 | case TIOCMIWAIT: | |
1726 | spin_lock_irqsave(&info->slock, flags); | |
1727 | cnow = info->icount; /* note the counters on entry */ | |
1728 | spin_unlock_irqrestore(&info->slock, flags); | |
1729 | ||
bdc04e31 | 1730 | return wait_event_interruptible(info->port.delta_msr_wait, |
1c45607a JS |
1731 | mxser_cflags_changed(info, arg, &cnow)); |
1732 | /* | |
1733 | * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) | |
1734 | * Return: write counters to the user passed counter struct | |
1735 | * NB: both 1->0 and 0->1 transitions are counted except for | |
1736 | * RI where only 0->1 is counted. | |
1737 | */ | |
41aee9a1 JS |
1738 | case TIOCGICOUNT: { |
1739 | struct serial_icounter_struct icnt = { 0 }; | |
1c45607a JS |
1740 | spin_lock_irqsave(&info->slock, flags); |
1741 | cnow = info->icount; | |
1742 | spin_unlock_irqrestore(&info->slock, flags); | |
41aee9a1 JS |
1743 | |
1744 | icnt.frame = cnow.frame; | |
1745 | icnt.brk = cnow.brk; | |
1746 | icnt.overrun = cnow.overrun; | |
1747 | icnt.buf_overrun = cnow.buf_overrun; | |
1748 | icnt.parity = cnow.parity; | |
1749 | icnt.rx = cnow.rx; | |
1750 | icnt.tx = cnow.tx; | |
1751 | icnt.cts = cnow.cts; | |
1752 | icnt.dsr = cnow.dsr; | |
1753 | icnt.rng = cnow.rng; | |
1754 | icnt.dcd = cnow.dcd; | |
1755 | ||
1756 | return copy_to_user(argp, &icnt, sizeof(icnt)) ? -EFAULT : 0; | |
1757 | } | |
1c45607a JS |
1758 | case MOXA_HighSpeedOn: |
1759 | return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp); | |
1760 | case MOXA_SDS_RSTICOUNTER: | |
07f86c03 | 1761 | spin_lock_irq(&info->slock); |
1c45607a JS |
1762 | info->mon_data.rxcnt = 0; |
1763 | info->mon_data.txcnt = 0; | |
07f86c03 | 1764 | spin_unlock_irq(&info->slock); |
1c45607a JS |
1765 | return 0; |
1766 | ||
1767 | case MOXA_ASPP_OQUEUE:{ | |
1768 | int len, lsr; | |
1769 | ||
1770 | len = mxser_chars_in_buffer(tty); | |
c6eb69ac | 1771 | spin_lock_irq(&info->slock); |
a75b7b68 | 1772 | lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_THRE; |
07f86c03 | 1773 | spin_unlock_irq(&info->slock); |
1c45607a JS |
1774 | len += (lsr ? 0 : 1); |
1775 | ||
1776 | return put_user(len, (int __user *)argp); | |
1777 | } | |
1778 | case MOXA_ASPP_MON: { | |
1779 | int mcr, status; | |
1780 | ||
c6eb69ac | 1781 | spin_lock_irq(&info->slock); |
1c45607a | 1782 | status = mxser_get_msr(info->ioaddr, 1, tty->index); |
216ba023 | 1783 | mxser_check_modem_status(tty, info, status); |
1c45607a JS |
1784 | |
1785 | mcr = inb(info->ioaddr + UART_MCR); | |
c6eb69ac | 1786 | spin_unlock_irq(&info->slock); |
07f86c03 | 1787 | |
1c45607a JS |
1788 | if (mcr & MOXA_MUST_MCR_XON_FLAG) |
1789 | info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD; | |
1790 | else | |
1791 | info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD; | |
1792 | ||
1793 | if (mcr & MOXA_MUST_MCR_TX_XON) | |
1794 | info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT; | |
1795 | else | |
1796 | info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT; | |
1797 | ||
216ba023 | 1798 | if (tty->hw_stopped) |
1c45607a JS |
1799 | info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD; |
1800 | else | |
1801 | info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD; | |
07f86c03 | 1802 | |
1c45607a JS |
1803 | if (copy_to_user(argp, &info->mon_data, |
1804 | sizeof(struct mxser_mon))) | |
1805 | return -EFAULT; | |
1806 | ||
1807 | return 0; | |
1808 | } | |
1809 | case MOXA_ASPP_LSTATUS: { | |
1810 | if (put_user(info->err_shadow, (unsigned char __user *)argp)) | |
1811 | return -EFAULT; | |
1812 | ||
1813 | info->err_shadow = 0; | |
1814 | return 0; | |
1815 | } | |
1816 | case MOXA_SET_BAUD_METHOD: { | |
1817 | int method; | |
1818 | ||
1819 | if (get_user(method, (int __user *)argp)) | |
1820 | return -EFAULT; | |
1821 | mxser_set_baud_method[tty->index] = method; | |
1822 | return put_user(method, (int __user *)argp); | |
1823 | } | |
1824 | default: | |
1825 | return -ENOIOCTLCMD; | |
1826 | } | |
1827 | return 0; | |
1828 | } | |
1829 | ||
1830 | static void mxser_stoprx(struct tty_struct *tty) | |
1831 | { | |
1832 | struct mxser_port *info = tty->driver_data; | |
1833 | ||
1834 | info->ldisc_stop_rx = 1; | |
1835 | if (I_IXOFF(tty)) { | |
1836 | if (info->board->chip_flag) { | |
1837 | info->IER &= ~MOXA_MUST_RECV_ISR; | |
1838 | outb(info->IER, info->ioaddr + UART_IER); | |
1839 | } else { | |
1840 | info->x_char = STOP_CHAR(tty); | |
1841 | outb(0, info->ioaddr + UART_IER); | |
1842 | info->IER |= UART_IER_THRI; | |
1843 | outb(info->IER, info->ioaddr + UART_IER); | |
1da177e4 LT |
1844 | } |
1845 | } | |
1846 | ||
216ba023 | 1847 | if (tty->termios->c_cflag & CRTSCTS) { |
1c45607a JS |
1848 | info->MCR &= ~UART_MCR_RTS; |
1849 | outb(info->MCR, info->ioaddr + UART_MCR); | |
1da177e4 LT |
1850 | } |
1851 | } | |
1852 | ||
1853 | /* | |
1854 | * This routine is called by the upper-layer tty layer to signal that | |
1855 | * incoming characters should be throttled. | |
1856 | */ | |
1857 | static void mxser_throttle(struct tty_struct *tty) | |
1858 | { | |
1da177e4 | 1859 | mxser_stoprx(tty); |
1da177e4 LT |
1860 | } |
1861 | ||
1862 | static void mxser_unthrottle(struct tty_struct *tty) | |
1863 | { | |
1c45607a | 1864 | struct mxser_port *info = tty->driver_data; |
1da177e4 | 1865 | |
1c45607a JS |
1866 | /* startrx */ |
1867 | info->ldisc_stop_rx = 0; | |
1868 | if (I_IXOFF(tty)) { | |
1869 | if (info->x_char) | |
1870 | info->x_char = 0; | |
1871 | else { | |
1872 | if (info->board->chip_flag) { | |
1873 | info->IER |= MOXA_MUST_RECV_ISR; | |
1874 | outb(info->IER, info->ioaddr + UART_IER); | |
1875 | } else { | |
1876 | info->x_char = START_CHAR(tty); | |
1877 | outb(0, info->ioaddr + UART_IER); | |
1878 | info->IER |= UART_IER_THRI; | |
1879 | outb(info->IER, info->ioaddr + UART_IER); | |
1880 | } | |
1da177e4 | 1881 | } |
1c45607a | 1882 | } |
1da177e4 | 1883 | |
216ba023 | 1884 | if (tty->termios->c_cflag & CRTSCTS) { |
1c45607a JS |
1885 | info->MCR |= UART_MCR_RTS; |
1886 | outb(info->MCR, info->ioaddr + UART_MCR); | |
1da177e4 LT |
1887 | } |
1888 | } | |
1889 | ||
1890 | /* | |
1891 | * mxser_stop() and mxser_start() | |
1892 | * | |
1893 | * This routines are called before setting or resetting tty->stopped. | |
1894 | * They enable or disable transmitter interrupts, as necessary. | |
1895 | */ | |
1896 | static void mxser_stop(struct tty_struct *tty) | |
1897 | { | |
1c45607a | 1898 | struct mxser_port *info = tty->driver_data; |
1da177e4 LT |
1899 | unsigned long flags; |
1900 | ||
1901 | spin_lock_irqsave(&info->slock, flags); | |
1902 | if (info->IER & UART_IER_THRI) { | |
1903 | info->IER &= ~UART_IER_THRI; | |
1c45607a | 1904 | outb(info->IER, info->ioaddr + UART_IER); |
1da177e4 LT |
1905 | } |
1906 | spin_unlock_irqrestore(&info->slock, flags); | |
1907 | } | |
1908 | ||
1909 | static void mxser_start(struct tty_struct *tty) | |
1910 | { | |
1c45607a | 1911 | struct mxser_port *info = tty->driver_data; |
1da177e4 LT |
1912 | unsigned long flags; |
1913 | ||
1914 | spin_lock_irqsave(&info->slock, flags); | |
0ad9e7d1 | 1915 | if (info->xmit_cnt && info->port.xmit_buf) { |
1c45607a | 1916 | outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER); |
1da177e4 | 1917 | info->IER |= UART_IER_THRI; |
1c45607a | 1918 | outb(info->IER, info->ioaddr + UART_IER); |
1da177e4 LT |
1919 | } |
1920 | spin_unlock_irqrestore(&info->slock, flags); | |
1921 | } | |
1922 | ||
1c45607a JS |
1923 | static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios) |
1924 | { | |
1925 | struct mxser_port *info = tty->driver_data; | |
1926 | unsigned long flags; | |
1927 | ||
1928 | spin_lock_irqsave(&info->slock, flags); | |
216ba023 | 1929 | mxser_change_speed(tty, old_termios); |
1c45607a JS |
1930 | spin_unlock_irqrestore(&info->slock, flags); |
1931 | ||
1932 | if ((old_termios->c_cflag & CRTSCTS) && | |
1933 | !(tty->termios->c_cflag & CRTSCTS)) { | |
1934 | tty->hw_stopped = 0; | |
1935 | mxser_start(tty); | |
1936 | } | |
1937 | ||
1938 | /* Handle sw stopped */ | |
1939 | if ((old_termios->c_iflag & IXON) && | |
1940 | !(tty->termios->c_iflag & IXON)) { | |
1941 | tty->stopped = 0; | |
1942 | ||
1943 | if (info->board->chip_flag) { | |
1944 | spin_lock_irqsave(&info->slock, flags); | |
148ff86b CH |
1945 | mxser_disable_must_rx_software_flow_control( |
1946 | info->ioaddr); | |
1c45607a JS |
1947 | spin_unlock_irqrestore(&info->slock, flags); |
1948 | } | |
1949 | ||
1950 | mxser_start(tty); | |
1951 | } | |
1952 | } | |
1953 | ||
1da177e4 LT |
1954 | /* |
1955 | * mxser_wait_until_sent() --- wait until the transmitter is empty | |
1956 | */ | |
1957 | static void mxser_wait_until_sent(struct tty_struct *tty, int timeout) | |
1958 | { | |
1c45607a | 1959 | struct mxser_port *info = tty->driver_data; |
1da177e4 | 1960 | unsigned long orig_jiffies, char_time; |
07f86c03 | 1961 | unsigned long flags; |
1da177e4 LT |
1962 | int lsr; |
1963 | ||
1964 | if (info->type == PORT_UNKNOWN) | |
1965 | return; | |
1966 | ||
1967 | if (info->xmit_fifo_size == 0) | |
1968 | return; /* Just in case.... */ | |
1969 | ||
1970 | orig_jiffies = jiffies; | |
1971 | /* | |
1972 | * Set the check interval to be 1/5 of the estimated time to | |
1973 | * send a single character, and make it at least 1. The check | |
1974 | * interval should also be less than the timeout. | |
1975 | * | |
1976 | * Note: we have to use pretty tight timings here to satisfy | |
1977 | * the NIST-PCTS. | |
1978 | */ | |
1979 | char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size; | |
1980 | char_time = char_time / 5; | |
1981 | if (char_time == 0) | |
1982 | char_time = 1; | |
1983 | if (timeout && timeout < char_time) | |
1984 | char_time = timeout; | |
1985 | /* | |
1986 | * If the transmitter hasn't cleared in twice the approximate | |
1987 | * amount of time to send the entire FIFO, it probably won't | |
1988 | * ever clear. This assumes the UART isn't doing flow | |
1989 | * control, which is currently the case. Hence, if it ever | |
1990 | * takes longer than info->timeout, this is probably due to a | |
1991 | * UART bug of some kind. So, we clamp the timeout parameter at | |
1992 | * 2*info->timeout. | |
1993 | */ | |
1994 | if (!timeout || timeout > 2 * info->timeout) | |
1995 | timeout = 2 * info->timeout; | |
1996 | #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT | |
8ea2c2ec JJ |
1997 | printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...", |
1998 | timeout, char_time); | |
1da177e4 LT |
1999 | printk("jiff=%lu...", jiffies); |
2000 | #endif | |
07f86c03 | 2001 | spin_lock_irqsave(&info->slock, flags); |
1c45607a | 2002 | while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) { |
1da177e4 LT |
2003 | #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT |
2004 | printk("lsr = %d (jiff=%lu)...", lsr, jiffies); | |
2005 | #endif | |
07f86c03 | 2006 | spin_unlock_irqrestore(&info->slock, flags); |
da4cd8df | 2007 | schedule_timeout_interruptible(char_time); |
07f86c03 | 2008 | spin_lock_irqsave(&info->slock, flags); |
1da177e4 | 2009 | if (signal_pending(current)) |
1c45607a JS |
2010 | break; |
2011 | if (timeout && time_after(jiffies, orig_jiffies + timeout)) | |
2012 | break; | |
1da177e4 | 2013 | } |
07f86c03 | 2014 | spin_unlock_irqrestore(&info->slock, flags); |
1c45607a | 2015 | set_current_state(TASK_RUNNING); |
1da177e4 | 2016 | |
1c45607a JS |
2017 | #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT |
2018 | printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies); | |
2019 | #endif | |
2020 | } | |
1da177e4 | 2021 | |
1c45607a JS |
2022 | /* |
2023 | * This routine is called by tty_hangup() when a hangup is signaled. | |
2024 | */ | |
2025 | static void mxser_hangup(struct tty_struct *tty) | |
2026 | { | |
2027 | struct mxser_port *info = tty->driver_data; | |
1da177e4 | 2028 | |
1c45607a | 2029 | mxser_flush_buffer(tty); |
3b6826b2 | 2030 | tty_port_hangup(&info->port); |
1da177e4 LT |
2031 | } |
2032 | ||
1c45607a JS |
2033 | /* |
2034 | * mxser_rs_break() --- routine which turns the break handling on or off | |
2035 | */ | |
9e98966c | 2036 | static int mxser_rs_break(struct tty_struct *tty, int break_state) |
1da177e4 | 2037 | { |
1c45607a | 2038 | struct mxser_port *info = tty->driver_data; |
1da177e4 LT |
2039 | unsigned long flags; |
2040 | ||
1c45607a JS |
2041 | spin_lock_irqsave(&info->slock, flags); |
2042 | if (break_state == -1) | |
2043 | outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC, | |
2044 | info->ioaddr + UART_LCR); | |
2045 | else | |
2046 | outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC, | |
2047 | info->ioaddr + UART_LCR); | |
2048 | spin_unlock_irqrestore(&info->slock, flags); | |
9e98966c | 2049 | return 0; |
1c45607a | 2050 | } |
1da177e4 | 2051 | |
216ba023 AC |
2052 | static void mxser_receive_chars(struct tty_struct *tty, |
2053 | struct mxser_port *port, int *status) | |
1c45607a | 2054 | { |
1c45607a JS |
2055 | unsigned char ch, gdl; |
2056 | int ignored = 0; | |
2057 | int cnt = 0; | |
2058 | int recv_room; | |
2059 | int max = 256; | |
1da177e4 | 2060 | |
1c45607a | 2061 | recv_room = tty->receive_room; |
216ba023 | 2062 | if (recv_room == 0 && !port->ldisc_stop_rx) |
1c45607a | 2063 | mxser_stoprx(tty); |
1c45607a | 2064 | if (port->board->chip_flag != MOXA_OTHER_UART) { |
1da177e4 | 2065 | |
1c45607a JS |
2066 | if (*status & UART_LSR_SPECIAL) |
2067 | goto intr_old; | |
2068 | if (port->board->chip_flag == MOXA_MUST_MU860_HWID && | |
2069 | (*status & MOXA_MUST_LSR_RERR)) | |
2070 | goto intr_old; | |
2071 | if (*status & MOXA_MUST_LSR_RERR) | |
2072 | goto intr_old; | |
1da177e4 | 2073 | |
1c45607a JS |
2074 | gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER); |
2075 | ||
2076 | if (port->board->chip_flag == MOXA_MUST_MU150_HWID) | |
2077 | gdl &= MOXA_MUST_GDL_MASK; | |
2078 | if (gdl >= recv_room) { | |
2079 | if (!port->ldisc_stop_rx) | |
2080 | mxser_stoprx(tty); | |
2081 | } | |
2082 | while (gdl--) { | |
2083 | ch = inb(port->ioaddr + UART_RX); | |
2084 | tty_insert_flip_char(tty, ch, 0); | |
2085 | cnt++; | |
2086 | } | |
2087 | goto end_intr; | |
1da177e4 | 2088 | } |
1c45607a JS |
2089 | intr_old: |
2090 | ||
2091 | do { | |
2092 | if (max-- < 0) | |
2093 | break; | |
1da177e4 | 2094 | |
1c45607a JS |
2095 | ch = inb(port->ioaddr + UART_RX); |
2096 | if (port->board->chip_flag && (*status & UART_LSR_OE)) | |
2097 | outb(0x23, port->ioaddr + UART_FCR); | |
2098 | *status &= port->read_status_mask; | |
2099 | if (*status & port->ignore_status_mask) { | |
2100 | if (++ignored > 100) | |
2101 | break; | |
2102 | } else { | |
2103 | char flag = 0; | |
2104 | if (*status & UART_LSR_SPECIAL) { | |
2105 | if (*status & UART_LSR_BI) { | |
2106 | flag = TTY_BREAK; | |
2107 | port->icount.brk++; | |
1da177e4 | 2108 | |
0ad9e7d1 | 2109 | if (port->port.flags & ASYNC_SAK) |
1c45607a JS |
2110 | do_SAK(tty); |
2111 | } else if (*status & UART_LSR_PE) { | |
2112 | flag = TTY_PARITY; | |
2113 | port->icount.parity++; | |
2114 | } else if (*status & UART_LSR_FE) { | |
2115 | flag = TTY_FRAME; | |
2116 | port->icount.frame++; | |
2117 | } else if (*status & UART_LSR_OE) { | |
2118 | flag = TTY_OVERRUN; | |
2119 | port->icount.overrun++; | |
2120 | } else | |
2121 | flag = TTY_BREAK; | |
2122 | } | |
2123 | tty_insert_flip_char(tty, ch, flag); | |
2124 | cnt++; | |
2125 | if (cnt >= recv_room) { | |
2126 | if (!port->ldisc_stop_rx) | |
2127 | mxser_stoprx(tty); | |
2128 | break; | |
2129 | } | |
1da177e4 | 2130 | |
1c45607a | 2131 | } |
1da177e4 | 2132 | |
1c45607a JS |
2133 | if (port->board->chip_flag) |
2134 | break; | |
1da177e4 | 2135 | |
1c45607a JS |
2136 | *status = inb(port->ioaddr + UART_LSR); |
2137 | } while (*status & UART_LSR_DR); | |
1da177e4 | 2138 | |
1c45607a | 2139 | end_intr: |
216ba023 | 2140 | mxvar_log.rxcnt[tty->index] += cnt; |
1c45607a JS |
2141 | port->mon_data.rxcnt += cnt; |
2142 | port->mon_data.up_rxcnt += cnt; | |
1da177e4 | 2143 | |
1c45607a JS |
2144 | /* |
2145 | * We are called from an interrupt context with &port->slock | |
2146 | * being held. Drop it temporarily in order to prevent | |
2147 | * recursive locking. | |
2148 | */ | |
2149 | spin_unlock(&port->slock); | |
2150 | tty_flip_buffer_push(tty); | |
2151 | spin_lock(&port->slock); | |
1da177e4 LT |
2152 | } |
2153 | ||
216ba023 | 2154 | static void mxser_transmit_chars(struct tty_struct *tty, struct mxser_port *port) |
1da177e4 | 2155 | { |
1c45607a | 2156 | int count, cnt; |
1da177e4 | 2157 | |
1c45607a JS |
2158 | if (port->x_char) { |
2159 | outb(port->x_char, port->ioaddr + UART_TX); | |
2160 | port->x_char = 0; | |
216ba023 | 2161 | mxvar_log.txcnt[tty->index]++; |
1c45607a JS |
2162 | port->mon_data.txcnt++; |
2163 | port->mon_data.up_txcnt++; | |
2164 | port->icount.tx++; | |
2165 | return; | |
2166 | } | |
1da177e4 | 2167 | |
0ad9e7d1 | 2168 | if (port->port.xmit_buf == NULL) |
1c45607a | 2169 | return; |
1da177e4 | 2170 | |
216ba023 AC |
2171 | if (port->xmit_cnt <= 0 || tty->stopped || |
2172 | (tty->hw_stopped && | |
1c45607a JS |
2173 | (port->type != PORT_16550A) && |
2174 | (!port->board->chip_flag))) { | |
2175 | port->IER &= ~UART_IER_THRI; | |
2176 | outb(port->IER, port->ioaddr + UART_IER); | |
2177 | return; | |
1da177e4 LT |
2178 | } |
2179 | ||
1c45607a JS |
2180 | cnt = port->xmit_cnt; |
2181 | count = port->xmit_fifo_size; | |
2182 | do { | |
0ad9e7d1 | 2183 | outb(port->port.xmit_buf[port->xmit_tail++], |
1c45607a JS |
2184 | port->ioaddr + UART_TX); |
2185 | port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1); | |
2186 | if (--port->xmit_cnt <= 0) | |
2187 | break; | |
2188 | } while (--count > 0); | |
216ba023 | 2189 | mxvar_log.txcnt[tty->index] += (cnt - port->xmit_cnt); |
1da177e4 | 2190 | |
1c45607a JS |
2191 | port->mon_data.txcnt += (cnt - port->xmit_cnt); |
2192 | port->mon_data.up_txcnt += (cnt - port->xmit_cnt); | |
2193 | port->icount.tx += (cnt - port->xmit_cnt); | |
1da177e4 | 2194 | |
216ba023 AC |
2195 | if (port->xmit_cnt < WAKEUP_CHARS && tty) |
2196 | tty_wakeup(tty); | |
1c45607a JS |
2197 | |
2198 | if (port->xmit_cnt <= 0) { | |
2199 | port->IER &= ~UART_IER_THRI; | |
2200 | outb(port->IER, port->ioaddr + UART_IER); | |
1da177e4 | 2201 | } |
1da177e4 LT |
2202 | } |
2203 | ||
2204 | /* | |
1c45607a | 2205 | * This is the serial driver's generic interrupt routine |
1da177e4 | 2206 | */ |
1c45607a | 2207 | static irqreturn_t mxser_interrupt(int irq, void *dev_id) |
1da177e4 | 2208 | { |
1c45607a JS |
2209 | int status, iir, i; |
2210 | struct mxser_board *brd = NULL; | |
2211 | struct mxser_port *port; | |
2212 | int max, irqbits, bits, msr; | |
2213 | unsigned int int_cnt, pass_counter = 0; | |
2214 | int handled = IRQ_NONE; | |
216ba023 | 2215 | struct tty_struct *tty; |
1da177e4 | 2216 | |
1c45607a JS |
2217 | for (i = 0; i < MXSER_BOARDS; i++) |
2218 | if (dev_id == &mxser_boards[i]) { | |
2219 | brd = dev_id; | |
2220 | break; | |
2221 | } | |
1da177e4 | 2222 | |
1c45607a JS |
2223 | if (i == MXSER_BOARDS) |
2224 | goto irq_stop; | |
2225 | if (brd == NULL) | |
2226 | goto irq_stop; | |
2227 | max = brd->info->nports; | |
2228 | while (pass_counter++ < MXSER_ISR_PASS_LIMIT) { | |
2229 | irqbits = inb(brd->vector) & brd->vector_mask; | |
2230 | if (irqbits == brd->vector_mask) | |
2231 | break; | |
1da177e4 | 2232 | |
1c45607a JS |
2233 | handled = IRQ_HANDLED; |
2234 | for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) { | |
2235 | if (irqbits == brd->vector_mask) | |
2236 | break; | |
2237 | if (bits & irqbits) | |
2238 | continue; | |
2239 | port = &brd->ports[i]; | |
2240 | ||
2241 | int_cnt = 0; | |
2242 | spin_lock(&port->slock); | |
2243 | do { | |
2244 | iir = inb(port->ioaddr + UART_IIR); | |
2245 | if (iir & UART_IIR_NO_INT) | |
2246 | break; | |
2247 | iir &= MOXA_MUST_IIR_MASK; | |
216ba023 AC |
2248 | tty = tty_port_tty_get(&port->port); |
2249 | if (!tty || | |
0ad9e7d1 AC |
2250 | (port->port.flags & ASYNC_CLOSING) || |
2251 | !(port->port.flags & | |
1c45607a JS |
2252 | ASYNC_INITIALIZED)) { |
2253 | status = inb(port->ioaddr + UART_LSR); | |
2254 | outb(0x27, port->ioaddr + UART_FCR); | |
2255 | inb(port->ioaddr + UART_MSR); | |
216ba023 | 2256 | tty_kref_put(tty); |
1c45607a JS |
2257 | break; |
2258 | } | |
1da177e4 | 2259 | |
1c45607a JS |
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) | |
216ba023 | 2277 | mxser_receive_chars(tty, port, |
1c45607a JS |
2278 | &status); |
2279 | ||
2280 | } else { | |
2281 | status &= port->read_status_mask; | |
2282 | if (status & UART_LSR_DR) | |
216ba023 | 2283 | mxser_receive_chars(tty, port, |
1c45607a JS |
2284 | &status); |
2285 | } | |
2286 | msr = inb(port->ioaddr + UART_MSR); | |
2287 | if (msr & UART_MSR_ANY_DELTA) | |
216ba023 | 2288 | mxser_check_modem_status(tty, port, msr); |
1c45607a JS |
2289 | |
2290 | if (port->board->chip_flag) { | |
2291 | if (iir == 0x02 && (status & | |
2292 | UART_LSR_THRE)) | |
216ba023 | 2293 | mxser_transmit_chars(tty, port); |
1c45607a JS |
2294 | } else { |
2295 | if (status & UART_LSR_THRE) | |
216ba023 | 2296 | mxser_transmit_chars(tty, port); |
1c45607a | 2297 | } |
216ba023 | 2298 | tty_kref_put(tty); |
1c45607a JS |
2299 | } while (int_cnt++ < MXSER_ISR_PASS_LIMIT); |
2300 | spin_unlock(&port->slock); | |
2301 | } | |
2302 | } | |
1da177e4 | 2303 | |
1c45607a JS |
2304 | irq_stop: |
2305 | return handled; | |
2306 | } | |
1da177e4 | 2307 | |
1c45607a JS |
2308 | static 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, | |
2328 | }; | |
1da177e4 | 2329 | |
31f35939 AC |
2330 | struct tty_port_operations mxser_port_ops = { |
2331 | .carrier_raised = mxser_carrier_raised, | |
fcc8ac18 | 2332 | .dtr_rts = mxser_dtr_rts, |
6769140d AC |
2333 | .activate = mxser_activate, |
2334 | .shutdown = mxser_shutdown_port, | |
31f35939 AC |
2335 | }; |
2336 | ||
1c45607a JS |
2337 | /* |
2338 | * The MOXA Smartio/Industio serial driver boot-time initialization code! | |
2339 | */ | |
1da177e4 | 2340 | |
1c45607a JS |
2341 | static void mxser_release_res(struct mxser_board *brd, struct pci_dev *pdev, |
2342 | unsigned int irq) | |
2343 | { | |
2344 | if (irq) | |
2345 | free_irq(brd->irq, brd); | |
2346 | if (pdev != NULL) { /* PCI */ | |
2347 | #ifdef CONFIG_PCI | |
2348 | pci_release_region(pdev, 2); | |
2349 | pci_release_region(pdev, 3); | |
2350 | #endif | |
2351 | } else { | |
2352 | release_region(brd->ports[0].ioaddr, 8 * brd->info->nports); | |
2353 | release_region(brd->vector, 1); | |
2354 | } | |
1da177e4 LT |
2355 | } |
2356 | ||
1c45607a JS |
2357 | static int __devinit mxser_initbrd(struct mxser_board *brd, |
2358 | struct pci_dev *pdev) | |
1da177e4 | 2359 | { |
1c45607a JS |
2360 | struct mxser_port *info; |
2361 | unsigned int i; | |
2362 | int retval; | |
1da177e4 | 2363 | |
83766bc6 JS |
2364 | printk(KERN_INFO "mxser: max. baud rate = %d bps\n", |
2365 | brd->ports[0].max_baud); | |
1da177e4 | 2366 | |
1c45607a JS |
2367 | for (i = 0; i < brd->info->nports; i++) { |
2368 | info = &brd->ports[i]; | |
44b7d1b3 | 2369 | tty_port_init(&info->port); |
31f35939 | 2370 | info->port.ops = &mxser_port_ops; |
1c45607a JS |
2371 | info->board = brd; |
2372 | info->stop_rx = 0; | |
2373 | info->ldisc_stop_rx = 0; | |
1da177e4 | 2374 | |
1c45607a JS |
2375 | /* Enhance mode enabled here */ |
2376 | if (brd->chip_flag != MOXA_OTHER_UART) | |
148ff86b | 2377 | mxser_enable_must_enchance_mode(info->ioaddr); |
1da177e4 | 2378 | |
0ad9e7d1 | 2379 | info->port.flags = ASYNC_SHARE_IRQ; |
1c45607a | 2380 | info->type = brd->uart_type; |
1da177e4 | 2381 | |
1c45607a | 2382 | process_txrx_fifo(info); |
1da177e4 | 2383 | |
1c45607a | 2384 | info->custom_divisor = info->baud_base * 16; |
44b7d1b3 AC |
2385 | info->port.close_delay = 5 * HZ / 10; |
2386 | info->port.closing_wait = 30 * HZ; | |
1c45607a | 2387 | info->normal_termios = mxvar_sdriver->init_termios; |
1c45607a JS |
2388 | memset(&info->mon_data, 0, sizeof(struct mxser_mon)); |
2389 | info->err_shadow = 0; | |
2390 | spin_lock_init(&info->slock); | |
1da177e4 | 2391 | |
1c45607a JS |
2392 | /* before set INT ISR, disable all int */ |
2393 | outb(inb(info->ioaddr + UART_IER) & 0xf0, | |
2394 | info->ioaddr + UART_IER); | |
2395 | } | |
1da177e4 | 2396 | |
1c45607a JS |
2397 | retval = request_irq(brd->irq, mxser_interrupt, IRQF_SHARED, "mxser", |
2398 | brd); | |
2399 | if (retval) { | |
2400 | printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may " | |
2401 | "conflict with another device.\n", | |
2402 | brd->info->name, brd->irq); | |
2403 | /* We hold resources, we need to release them. */ | |
2404 | mxser_release_res(brd, pdev, 0); | |
2405 | } | |
2406 | return retval; | |
2407 | } | |
1da177e4 | 2408 | |
1c45607a | 2409 | static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd) |
1da177e4 LT |
2410 | { |
2411 | int id, i, bits; | |
2412 | unsigned short regs[16], irq; | |
2413 | unsigned char scratch, scratch2; | |
2414 | ||
1c45607a | 2415 | brd->chip_flag = MOXA_OTHER_UART; |
1da177e4 LT |
2416 | |
2417 | id = mxser_read_register(cap, regs); | |
1c45607a JS |
2418 | switch (id) { |
2419 | case C168_ASIC_ID: | |
2420 | brd->info = &mxser_cards[0]; | |
2421 | break; | |
2422 | case C104_ASIC_ID: | |
2423 | brd->info = &mxser_cards[1]; | |
2424 | break; | |
2425 | case CI104J_ASIC_ID: | |
2426 | brd->info = &mxser_cards[2]; | |
2427 | break; | |
2428 | case C102_ASIC_ID: | |
2429 | brd->info = &mxser_cards[5]; | |
2430 | break; | |
2431 | case CI132_ASIC_ID: | |
2432 | brd->info = &mxser_cards[6]; | |
2433 | break; | |
2434 | case CI134_ASIC_ID: | |
2435 | brd->info = &mxser_cards[7]; | |
2436 | break; | |
2437 | default: | |
8ea2c2ec | 2438 | return 0; |
1c45607a | 2439 | } |
1da177e4 LT |
2440 | |
2441 | irq = 0; | |
1c45607a JS |
2442 | /* some ISA cards have 2 ports, but we want to see them as 4-port (why?) |
2443 | Flag-hack checks if configuration should be read as 2-port here. */ | |
2444 | if (brd->info->nports == 2 || (brd->info->flags & MXSER_HAS2)) { | |
1da177e4 LT |
2445 | irq = regs[9] & 0xF000; |
2446 | irq = irq | (irq >> 4); | |
2447 | if (irq != (regs[9] & 0xFF00)) | |
83766bc6 | 2448 | goto err_irqconflict; |
1c45607a | 2449 | } else if (brd->info->nports == 4) { |
1da177e4 LT |
2450 | irq = regs[9] & 0xF000; |
2451 | irq = irq | (irq >> 4); | |
2452 | irq = irq | (irq >> 8); | |
2453 | if (irq != regs[9]) | |
83766bc6 | 2454 | goto err_irqconflict; |
1c45607a | 2455 | } else if (brd->info->nports == 8) { |
1da177e4 LT |
2456 | irq = regs[9] & 0xF000; |
2457 | irq = irq | (irq >> 4); | |
2458 | irq = irq | (irq >> 8); | |
2459 | if ((irq != regs[9]) || (irq != regs[10])) | |
83766bc6 | 2460 | goto err_irqconflict; |
1da177e4 LT |
2461 | } |
2462 | ||
83766bc6 JS |
2463 | if (!irq) { |
2464 | printk(KERN_ERR "mxser: interrupt number unset\n"); | |
2465 | return -EIO; | |
2466 | } | |
1c45607a | 2467 | brd->irq = ((int)(irq & 0xF000) >> 12); |
1da177e4 | 2468 | for (i = 0; i < 8; i++) |
1c45607a | 2469 | brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8; |
83766bc6 JS |
2470 | if ((regs[12] & 0x80) == 0) { |
2471 | printk(KERN_ERR "mxser: invalid interrupt vector\n"); | |
2472 | return -EIO; | |
2473 | } | |
1c45607a | 2474 | brd->vector = (int)regs[11]; /* interrupt vector */ |
1da177e4 | 2475 | if (id == 1) |
1c45607a | 2476 | brd->vector_mask = 0x00FF; |
1da177e4 | 2477 | else |
1c45607a | 2478 | brd->vector_mask = 0x000F; |
1da177e4 LT |
2479 | for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) { |
2480 | if (regs[12] & bits) { | |
1c45607a JS |
2481 | brd->ports[i].baud_base = 921600; |
2482 | brd->ports[i].max_baud = 921600; | |
1da177e4 | 2483 | } else { |
1c45607a JS |
2484 | brd->ports[i].baud_base = 115200; |
2485 | brd->ports[i].max_baud = 115200; | |
1da177e4 LT |
2486 | } |
2487 | } | |
2488 | scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB); | |
2489 | outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR); | |
2490 | outb(0, cap + UART_EFR); /* EFR is the same as FCR */ | |
2491 | outb(scratch2, cap + UART_LCR); | |
2492 | outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR); | |
2493 | scratch = inb(cap + UART_IIR); | |
2494 | ||
2495 | if (scratch & 0xC0) | |
1c45607a | 2496 | brd->uart_type = PORT_16550A; |
1da177e4 | 2497 | else |
1c45607a JS |
2498 | brd->uart_type = PORT_16450; |
2499 | if (!request_region(brd->ports[0].ioaddr, 8 * brd->info->nports, | |
83766bc6 JS |
2500 | "mxser(IO)")) { |
2501 | printk(KERN_ERR "mxser: can't request ports I/O region: " | |
2502 | "0x%.8lx-0x%.8lx\n", | |
2503 | brd->ports[0].ioaddr, brd->ports[0].ioaddr + | |
2504 | 8 * brd->info->nports - 1); | |
2505 | return -EIO; | |
2506 | } | |
1c45607a JS |
2507 | if (!request_region(brd->vector, 1, "mxser(vector)")) { |
2508 | release_region(brd->ports[0].ioaddr, 8 * brd->info->nports); | |
83766bc6 JS |
2509 | printk(KERN_ERR "mxser: can't request interrupt vector region: " |
2510 | "0x%.8lx-0x%.8lx\n", | |
2511 | brd->ports[0].ioaddr, brd->ports[0].ioaddr + | |
2512 | 8 * brd->info->nports - 1); | |
2513 | return -EIO; | |
1c45607a JS |
2514 | } |
2515 | return brd->info->nports; | |
83766bc6 JS |
2516 | |
2517 | err_irqconflict: | |
2518 | printk(KERN_ERR "mxser: invalid interrupt number\n"); | |
2519 | return -EIO; | |
1da177e4 LT |
2520 | } |
2521 | ||
1c45607a JS |
2522 | static int __devinit mxser_probe(struct pci_dev *pdev, |
2523 | const struct pci_device_id *ent) | |
1da177e4 | 2524 | { |
1c45607a JS |
2525 | #ifdef CONFIG_PCI |
2526 | struct mxser_board *brd; | |
2527 | unsigned int i, j; | |
2528 | unsigned long ioaddress; | |
2529 | int retval = -EINVAL; | |
1da177e4 | 2530 | |
1c45607a JS |
2531 | for (i = 0; i < MXSER_BOARDS; i++) |
2532 | if (mxser_boards[i].info == NULL) | |
2533 | break; | |
2534 | ||
2535 | if (i >= MXSER_BOARDS) { | |
83766bc6 JS |
2536 | dev_err(&pdev->dev, "too many boards found (maximum %d), board " |
2537 | "not configured\n", MXSER_BOARDS); | |
1c45607a JS |
2538 | goto err; |
2539 | } | |
2540 | ||
2541 | brd = &mxser_boards[i]; | |
2542 | brd->idx = i * MXSER_PORTS_PER_BOARD; | |
83766bc6 | 2543 | dev_info(&pdev->dev, "found MOXA %s board (BusNo=%d, DevNo=%d)\n", |
1c45607a JS |
2544 | mxser_cards[ent->driver_data].name, |
2545 | pdev->bus->number, PCI_SLOT(pdev->devfn)); | |
2546 | ||
2547 | retval = pci_enable_device(pdev); | |
2548 | if (retval) { | |
83766bc6 | 2549 | dev_err(&pdev->dev, "PCI enable failed\n"); |
1c45607a JS |
2550 | goto err; |
2551 | } | |
2552 | ||
2553 | /* io address */ | |
2554 | ioaddress = pci_resource_start(pdev, 2); | |
2555 | retval = pci_request_region(pdev, 2, "mxser(IO)"); | |
2556 | if (retval) | |
2557 | goto err; | |
2558 | ||
2559 | brd->info = &mxser_cards[ent->driver_data]; | |
2560 | for (i = 0; i < brd->info->nports; i++) | |
2561 | brd->ports[i].ioaddr = ioaddress + 8 * i; | |
2562 | ||
2563 | /* vector */ | |
2564 | ioaddress = pci_resource_start(pdev, 3); | |
2565 | retval = pci_request_region(pdev, 3, "mxser(vector)"); | |
2566 | if (retval) | |
2567 | goto err_relio; | |
2568 | brd->vector = ioaddress; | |
2569 | ||
2570 | /* irq */ | |
2571 | brd->irq = pdev->irq; | |
2572 | ||
2573 | brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr); | |
2574 | brd->uart_type = PORT_16550A; | |
2575 | brd->vector_mask = 0; | |
2576 | ||
2577 | for (i = 0; i < brd->info->nports; i++) { | |
2578 | for (j = 0; j < UART_INFO_NUM; j++) { | |
2579 | if (Gpci_uart_info[j].type == brd->chip_flag) { | |
2580 | brd->ports[i].max_baud = | |
2581 | Gpci_uart_info[j].max_baud; | |
2582 | ||
2583 | /* exception....CP-102 */ | |
2584 | if (brd->info->flags & MXSER_HIGHBAUD) | |
2585 | brd->ports[i].max_baud = 921600; | |
2586 | break; | |
1da177e4 LT |
2587 | } |
2588 | } | |
1c45607a JS |
2589 | } |
2590 | ||
2591 | if (brd->chip_flag == MOXA_MUST_MU860_HWID) { | |
2592 | for (i = 0; i < brd->info->nports; i++) { | |
2593 | if (i < 4) | |
2594 | brd->ports[i].opmode_ioaddr = ioaddress + 4; | |
2595 | else | |
2596 | brd->ports[i].opmode_ioaddr = ioaddress + 0x0c; | |
1da177e4 | 2597 | } |
1c45607a JS |
2598 | outb(0, ioaddress + 4); /* default set to RS232 mode */ |
2599 | outb(0, ioaddress + 0x0c); /* default set to RS232 mode */ | |
1da177e4 | 2600 | } |
1c45607a JS |
2601 | |
2602 | for (i = 0; i < brd->info->nports; i++) { | |
2603 | brd->vector_mask |= (1 << i); | |
2604 | brd->ports[i].baud_base = 921600; | |
2605 | } | |
2606 | ||
2607 | /* mxser_initbrd will hook ISR. */ | |
2608 | retval = mxser_initbrd(brd, pdev); | |
2609 | if (retval) | |
2610 | goto err_null; | |
2611 | ||
2612 | for (i = 0; i < brd->info->nports; i++) | |
2613 | tty_register_device(mxvar_sdriver, brd->idx + i, &pdev->dev); | |
2614 | ||
2615 | pci_set_drvdata(pdev, brd); | |
2616 | ||
2617 | return 0; | |
2618 | err_relio: | |
2619 | pci_release_region(pdev, 2); | |
2620 | err_null: | |
2621 | brd->info = NULL; | |
2622 | err: | |
2623 | return retval; | |
2624 | #else | |
2625 | return -ENODEV; | |
2626 | #endif | |
1da177e4 LT |
2627 | } |
2628 | ||
1c45607a | 2629 | static void __devexit mxser_remove(struct pci_dev *pdev) |
1da177e4 | 2630 | { |
1c45607a JS |
2631 | struct mxser_board *brd = pci_get_drvdata(pdev); |
2632 | unsigned int i; | |
1da177e4 | 2633 | |
1c45607a JS |
2634 | for (i = 0; i < brd->info->nports; i++) |
2635 | tty_unregister_device(mxvar_sdriver, brd->idx + i); | |
1da177e4 | 2636 | |
1c45607a JS |
2637 | mxser_release_res(brd, pdev, 1); |
2638 | brd->info = NULL; | |
1da177e4 LT |
2639 | } |
2640 | ||
1c45607a JS |
2641 | static struct pci_driver mxser_driver = { |
2642 | .name = "mxser", | |
2643 | .id_table = mxser_pcibrds, | |
2644 | .probe = mxser_probe, | |
2645 | .remove = __devexit_p(mxser_remove) | |
2646 | }; | |
2647 | ||
2648 | static int __init mxser_module_init(void) | |
1da177e4 | 2649 | { |
1c45607a | 2650 | struct mxser_board *brd; |
1df00924 JS |
2651 | unsigned int b, i, m; |
2652 | int retval; | |
1da177e4 | 2653 | |
1c45607a JS |
2654 | mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1); |
2655 | if (!mxvar_sdriver) | |
2656 | return -ENOMEM; | |
2657 | ||
2658 | printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n", | |
2659 | MXSER_VERSION); | |
2660 | ||
2661 | /* Initialize the tty_driver structure */ | |
2662 | mxvar_sdriver->owner = THIS_MODULE; | |
2663 | mxvar_sdriver->magic = TTY_DRIVER_MAGIC; | |
2664 | mxvar_sdriver->name = "ttyMI"; | |
2665 | mxvar_sdriver->major = ttymajor; | |
2666 | mxvar_sdriver->minor_start = 0; | |
2667 | mxvar_sdriver->num = MXSER_PORTS + 1; | |
2668 | mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL; | |
2669 | mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL; | |
2670 | mxvar_sdriver->init_termios = tty_std_termios; | |
2671 | mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL; | |
2672 | mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_DYNAMIC_DEV; | |
2673 | tty_set_operations(mxvar_sdriver, &mxser_ops); | |
2674 | ||
2675 | retval = tty_register_driver(mxvar_sdriver); | |
2676 | if (retval) { | |
2677 | printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family " | |
2678 | "tty driver !\n"); | |
2679 | goto err_put; | |
1da177e4 | 2680 | } |
1c45607a | 2681 | |
1c45607a | 2682 | /* Start finding ISA boards here */ |
1df00924 JS |
2683 | for (m = 0, b = 0; b < MXSER_BOARDS; b++) { |
2684 | if (!ioaddr[b]) | |
2685 | continue; | |
2686 | ||
2687 | brd = &mxser_boards[m]; | |
96050dfb | 2688 | retval = mxser_get_ISA_conf(ioaddr[b], brd); |
1df00924 JS |
2689 | if (retval <= 0) { |
2690 | brd->info = NULL; | |
2691 | continue; | |
2692 | } | |
1c45607a | 2693 | |
1df00924 JS |
2694 | printk(KERN_INFO "mxser: found MOXA %s board (CAP=0x%lx)\n", |
2695 | brd->info->name, ioaddr[b]); | |
83766bc6 | 2696 | |
1df00924 JS |
2697 | /* mxser_initbrd will hook ISR. */ |
2698 | if (mxser_initbrd(brd, NULL) < 0) { | |
2699 | brd->info = NULL; | |
2700 | continue; | |
2701 | } | |
1c45607a | 2702 | |
1df00924 JS |
2703 | brd->idx = m * MXSER_PORTS_PER_BOARD; |
2704 | for (i = 0; i < brd->info->nports; i++) | |
2705 | tty_register_device(mxvar_sdriver, brd->idx + i, NULL); | |
1c45607a | 2706 | |
1df00924 JS |
2707 | m++; |
2708 | } | |
1c45607a JS |
2709 | |
2710 | retval = pci_register_driver(&mxser_driver); | |
2711 | if (retval) { | |
83766bc6 | 2712 | printk(KERN_ERR "mxser: can't register pci driver\n"); |
1c45607a JS |
2713 | if (!m) { |
2714 | retval = -ENODEV; | |
2715 | goto err_unr; | |
2716 | } /* else: we have some ISA cards under control */ | |
2717 | } | |
2718 | ||
1c45607a JS |
2719 | return 0; |
2720 | err_unr: | |
2721 | tty_unregister_driver(mxvar_sdriver); | |
2722 | err_put: | |
2723 | put_tty_driver(mxvar_sdriver); | |
2724 | return retval; | |
2725 | } | |
2726 | ||
2727 | static void __exit mxser_module_exit(void) | |
2728 | { | |
2729 | unsigned int i, j; | |
2730 | ||
1c45607a JS |
2731 | pci_unregister_driver(&mxser_driver); |
2732 | ||
2733 | for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */ | |
2734 | if (mxser_boards[i].info != NULL) | |
2735 | for (j = 0; j < mxser_boards[i].info->nports; j++) | |
2736 | tty_unregister_device(mxvar_sdriver, | |
2737 | mxser_boards[i].idx + j); | |
2738 | tty_unregister_driver(mxvar_sdriver); | |
2739 | put_tty_driver(mxvar_sdriver); | |
2740 | ||
2741 | for (i = 0; i < MXSER_BOARDS; i++) | |
2742 | if (mxser_boards[i].info != NULL) | |
2743 | mxser_release_res(&mxser_boards[i], NULL, 1); | |
1da177e4 LT |
2744 | } |
2745 | ||
2746 | module_init(mxser_module_init); | |
2747 | module_exit(mxser_module_exit); |