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> |
5a3c6b25 | 42 | #include <linux/ratelimit.h> |
1da177e4 LT |
43 | |
44 | #include <asm/system.h> | |
45 | #include <asm/io.h> | |
46 | #include <asm/irq.h> | |
1da177e4 LT |
47 | #include <asm/uaccess.h> |
48 | ||
49 | #include "mxser.h" | |
50 | ||
502f295f | 51 | #define MXSER_VERSION "2.0.5" /* 1.14 */ |
1da177e4 | 52 | #define MXSERMAJOR 174 |
1da177e4 | 53 | |
1da177e4 | 54 | #define MXSER_BOARDS 4 /* Max. boards */ |
1da177e4 | 55 | #define MXSER_PORTS_PER_BOARD 8 /* Max. ports per board */ |
1c45607a JS |
56 | #define MXSER_PORTS (MXSER_BOARDS * MXSER_PORTS_PER_BOARD) |
57 | #define MXSER_ISR_PASS_LIMIT 100 | |
1da177e4 | 58 | |
1c45607a JS |
59 | /*CheckIsMoxaMust return value*/ |
60 | #define MOXA_OTHER_UART 0x00 | |
61 | #define MOXA_MUST_MU150_HWID 0x01 | |
62 | #define MOXA_MUST_MU860_HWID 0x02 | |
63 | ||
1da177e4 LT |
64 | #define WAKEUP_CHARS 256 |
65 | ||
66 | #define UART_MCR_AFE 0x20 | |
67 | #define UART_LSR_SPECIAL 0x1E | |
68 | ||
e129deff | 69 | #define PCI_DEVICE_ID_POS104UL 0x1044 |
1c45607a | 70 | #define PCI_DEVICE_ID_CB108 0x1080 |
e129deff | 71 | #define PCI_DEVICE_ID_CP102UF 0x1023 |
502f295f | 72 | #define PCI_DEVICE_ID_CP112UL 0x1120 |
1c45607a | 73 | #define PCI_DEVICE_ID_CB114 0x1142 |
80ff8a80 | 74 | #define PCI_DEVICE_ID_CP114UL 0x1143 |
1c45607a JS |
75 | #define PCI_DEVICE_ID_CB134I 0x1341 |
76 | #define PCI_DEVICE_ID_CP138U 0x1380 | |
1da177e4 | 77 | |
1da177e4 LT |
78 | |
79 | #define C168_ASIC_ID 1 | |
80 | #define C104_ASIC_ID 2 | |
81 | #define C102_ASIC_ID 0xB | |
82 | #define CI132_ASIC_ID 4 | |
83 | #define CI134_ASIC_ID 3 | |
84 | #define CI104J_ASIC_ID 5 | |
85 | ||
1c45607a JS |
86 | #define MXSER_HIGHBAUD 1 |
87 | #define MXSER_HAS2 2 | |
1da177e4 | 88 | |
8ea2c2ec | 89 | /* This is only for PCI */ |
1c45607a | 90 | static const struct { |
1da177e4 LT |
91 | int type; |
92 | int tx_fifo; | |
93 | int rx_fifo; | |
94 | int xmit_fifo_size; | |
95 | int rx_high_water; | |
96 | int rx_trigger; | |
97 | int rx_low_water; | |
98 | long max_baud; | |
1c45607a | 99 | } Gpci_uart_info[] = { |
1da177e4 LT |
100 | {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L}, |
101 | {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L}, | |
102 | {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L} | |
103 | }; | |
1c45607a | 104 | #define UART_INFO_NUM ARRAY_SIZE(Gpci_uart_info) |
1da177e4 | 105 | |
1c45607a JS |
106 | struct mxser_cardinfo { |
107 | char *name; | |
108 | unsigned int nports; | |
109 | unsigned int flags; | |
110 | }; | |
1da177e4 | 111 | |
1c45607a JS |
112 | static const struct mxser_cardinfo mxser_cards[] = { |
113 | /* 0*/ { "C168 series", 8, }, | |
114 | { "C104 series", 4, }, | |
115 | { "CI-104J series", 4, }, | |
116 | { "C168H/PCI series", 8, }, | |
117 | { "C104H/PCI series", 4, }, | |
118 | /* 5*/ { "C102 series", 4, MXSER_HAS2 }, /* C102-ISA */ | |
119 | { "CI-132 series", 4, MXSER_HAS2 }, | |
120 | { "CI-134 series", 4, }, | |
121 | { "CP-132 series", 2, }, | |
122 | { "CP-114 series", 4, }, | |
123 | /*10*/ { "CT-114 series", 4, }, | |
124 | { "CP-102 series", 2, MXSER_HIGHBAUD }, | |
125 | { "CP-104U series", 4, }, | |
126 | { "CP-168U series", 8, }, | |
127 | { "CP-132U series", 2, }, | |
128 | /*15*/ { "CP-134U series", 4, }, | |
129 | { "CP-104JU series", 4, }, | |
130 | { "Moxa UC7000 Serial", 8, }, /* RC7000 */ | |
131 | { "CP-118U series", 8, }, | |
132 | { "CP-102UL series", 2, }, | |
133 | /*20*/ { "CP-102U series", 2, }, | |
134 | { "CP-118EL series", 8, }, | |
135 | { "CP-168EL series", 8, }, | |
136 | { "CP-104EL series", 4, }, | |
137 | { "CB-108 series", 8, }, | |
138 | /*25*/ { "CB-114 series", 4, }, | |
139 | { "CB-134I series", 4, }, | |
140 | { "CP-138U series", 8, }, | |
80ff8a80 | 141 | { "POS-104UL series", 4, }, |
e129deff | 142 | { "CP-114UL series", 4, }, |
502f295f JS |
143 | /*30*/ { "CP-102UF series", 2, }, |
144 | { "CP-112UL series", 2, }, | |
1c45607a | 145 | }; |
1da177e4 | 146 | |
1c45607a JS |
147 | /* driver_data correspond to the lines in the structure above |
148 | see also ISA probe function before you change something */ | |
1da177e4 | 149 | static struct pci_device_id mxser_pcibrds[] = { |
1c45607a JS |
150 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C168), .driver_data = 3 }, |
151 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C104), .driver_data = 4 }, | |
152 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132), .driver_data = 8 }, | |
153 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP114), .driver_data = 9 }, | |
154 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CT114), .driver_data = 10 }, | |
155 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102), .driver_data = 11 }, | |
156 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104U), .driver_data = 12 }, | |
157 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168U), .driver_data = 13 }, | |
158 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132U), .driver_data = 14 }, | |
159 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP134U), .driver_data = 15 }, | |
160 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104JU),.driver_data = 16 }, | |
161 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_RC7000), .driver_data = 17 }, | |
162 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118U), .driver_data = 18 }, | |
163 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102UL),.driver_data = 19 }, | |
164 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102U), .driver_data = 20 }, | |
165 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118EL),.driver_data = 21 }, | |
166 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168EL),.driver_data = 22 }, | |
167 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104EL),.driver_data = 23 }, | |
168 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB108), .driver_data = 24 }, | |
169 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB114), .driver_data = 25 }, | |
170 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB134I), .driver_data = 26 }, | |
171 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP138U), .driver_data = 27 }, | |
172 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_POS104UL), .driver_data = 28 }, | |
80ff8a80 | 173 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP114UL), .driver_data = 29 }, |
e129deff | 174 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP102UF), .driver_data = 30 }, |
502f295f | 175 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP112UL), .driver_data = 31 }, |
1c45607a | 176 | { } |
1da177e4 | 177 | }; |
1da177e4 LT |
178 | MODULE_DEVICE_TABLE(pci, mxser_pcibrds); |
179 | ||
1df00924 | 180 | static unsigned long ioaddr[MXSER_BOARDS]; |
1da177e4 | 181 | static int ttymajor = MXSERMAJOR; |
1da177e4 LT |
182 | |
183 | /* Variables for insmod */ | |
184 | ||
185 | MODULE_AUTHOR("Casper Yang"); | |
186 | MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver"); | |
1df00924 JS |
187 | module_param_array(ioaddr, ulong, NULL, 0); |
188 | MODULE_PARM_DESC(ioaddr, "ISA io addresses to look for a moxa board"); | |
8d3b33f6 | 189 | module_param(ttymajor, int, 0); |
1da177e4 LT |
190 | MODULE_LICENSE("GPL"); |
191 | ||
192 | struct mxser_log { | |
193 | int tick; | |
194 | unsigned long rxcnt[MXSER_PORTS]; | |
195 | unsigned long txcnt[MXSER_PORTS]; | |
196 | }; | |
197 | ||
1da177e4 LT |
198 | struct mxser_mon { |
199 | unsigned long rxcnt; | |
200 | unsigned long txcnt; | |
201 | unsigned long up_rxcnt; | |
202 | unsigned long up_txcnt; | |
203 | int modem_status; | |
204 | unsigned char hold_reason; | |
205 | }; | |
206 | ||
207 | struct mxser_mon_ext { | |
208 | unsigned long rx_cnt[32]; | |
209 | unsigned long tx_cnt[32]; | |
210 | unsigned long up_rxcnt[32]; | |
211 | unsigned long up_txcnt[32]; | |
212 | int modem_status[32]; | |
213 | ||
214 | long baudrate[32]; | |
215 | int databits[32]; | |
216 | int stopbits[32]; | |
217 | int parity[32]; | |
218 | int flowctrl[32]; | |
219 | int fifo[32]; | |
220 | int iftype[32]; | |
221 | }; | |
8ea2c2ec | 222 | |
1c45607a JS |
223 | struct mxser_board; |
224 | ||
225 | struct mxser_port { | |
0ad9e7d1 | 226 | struct tty_port port; |
1c45607a | 227 | struct mxser_board *board; |
1c45607a JS |
228 | |
229 | unsigned long ioaddr; | |
230 | unsigned long opmode_ioaddr; | |
231 | int max_baud; | |
1da177e4 | 232 | |
1da177e4 LT |
233 | int rx_high_water; |
234 | int rx_trigger; /* Rx fifo trigger level */ | |
235 | int rx_low_water; | |
236 | int baud_base; /* max. speed */ | |
1da177e4 | 237 | int type; /* UART type */ |
1c45607a | 238 | |
1da177e4 | 239 | int x_char; /* xon/xoff character */ |
1da177e4 LT |
240 | int IER; /* Interrupt Enable Register */ |
241 | int MCR; /* Modem control register */ | |
1c45607a JS |
242 | |
243 | unsigned char stop_rx; | |
244 | unsigned char ldisc_stop_rx; | |
245 | ||
246 | int custom_divisor; | |
1c45607a | 247 | unsigned char err_shadow; |
1c45607a | 248 | |
1c45607a JS |
249 | struct async_icount icount; /* kernel counters for 4 input interrupts */ |
250 | int timeout; | |
251 | ||
252 | int read_status_mask; | |
253 | int ignore_status_mask; | |
254 | int xmit_fifo_size; | |
1da177e4 LT |
255 | int xmit_head; |
256 | int xmit_tail; | |
257 | int xmit_cnt; | |
1c45607a | 258 | |
606d099c | 259 | struct ktermios normal_termios; |
1c45607a | 260 | |
1da177e4 | 261 | struct mxser_mon mon_data; |
1c45607a | 262 | |
1da177e4 | 263 | spinlock_t slock; |
1c45607a JS |
264 | }; |
265 | ||
266 | struct mxser_board { | |
267 | unsigned int idx; | |
268 | int irq; | |
269 | const struct mxser_cardinfo *info; | |
270 | unsigned long vector; | |
271 | unsigned long vector_mask; | |
272 | ||
273 | int chip_flag; | |
274 | int uart_type; | |
275 | ||
276 | struct mxser_port ports[MXSER_PORTS_PER_BOARD]; | |
1da177e4 LT |
277 | }; |
278 | ||
1da177e4 LT |
279 | struct mxser_mstatus { |
280 | tcflag_t cflag; | |
281 | int cts; | |
282 | int dsr; | |
283 | int ri; | |
284 | int dcd; | |
285 | }; | |
286 | ||
1c45607a | 287 | static struct mxser_board mxser_boards[MXSER_BOARDS]; |
1da177e4 | 288 | static struct tty_driver *mxvar_sdriver; |
1da177e4 | 289 | static struct mxser_log mxvar_log; |
1da177e4 | 290 | static int mxser_set_baud_method[MXSER_PORTS + 1]; |
1da177e4 | 291 | |
148ff86b CH |
292 | static void mxser_enable_must_enchance_mode(unsigned long baseio) |
293 | { | |
294 | u8 oldlcr; | |
295 | u8 efr; | |
296 | ||
297 | oldlcr = inb(baseio + UART_LCR); | |
298 | outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); | |
299 | ||
300 | efr = inb(baseio + MOXA_MUST_EFR_REGISTER); | |
301 | efr |= MOXA_MUST_EFR_EFRB_ENABLE; | |
302 | ||
303 | outb(efr, baseio + MOXA_MUST_EFR_REGISTER); | |
304 | outb(oldlcr, baseio + UART_LCR); | |
305 | } | |
306 | ||
e89d67cf | 307 | #ifdef CONFIG_PCI |
148ff86b CH |
308 | static void mxser_disable_must_enchance_mode(unsigned long baseio) |
309 | { | |
310 | u8 oldlcr; | |
311 | u8 efr; | |
312 | ||
313 | oldlcr = inb(baseio + UART_LCR); | |
314 | outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); | |
315 | ||
316 | efr = inb(baseio + MOXA_MUST_EFR_REGISTER); | |
317 | efr &= ~MOXA_MUST_EFR_EFRB_ENABLE; | |
318 | ||
319 | outb(efr, baseio + MOXA_MUST_EFR_REGISTER); | |
320 | outb(oldlcr, baseio + UART_LCR); | |
321 | } | |
e89d67cf | 322 | #endif |
148ff86b CH |
323 | |
324 | static void mxser_set_must_xon1_value(unsigned long baseio, u8 value) | |
325 | { | |
326 | u8 oldlcr; | |
327 | u8 efr; | |
328 | ||
329 | oldlcr = inb(baseio + UART_LCR); | |
330 | outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); | |
331 | ||
332 | efr = inb(baseio + MOXA_MUST_EFR_REGISTER); | |
333 | efr &= ~MOXA_MUST_EFR_BANK_MASK; | |
334 | efr |= MOXA_MUST_EFR_BANK0; | |
335 | ||
336 | outb(efr, baseio + MOXA_MUST_EFR_REGISTER); | |
337 | outb(value, baseio + MOXA_MUST_XON1_REGISTER); | |
338 | outb(oldlcr, baseio + UART_LCR); | |
339 | } | |
340 | ||
341 | static void mxser_set_must_xoff1_value(unsigned long baseio, u8 value) | |
342 | { | |
343 | u8 oldlcr; | |
344 | u8 efr; | |
345 | ||
346 | oldlcr = inb(baseio + UART_LCR); | |
347 | outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); | |
348 | ||
349 | efr = inb(baseio + MOXA_MUST_EFR_REGISTER); | |
350 | efr &= ~MOXA_MUST_EFR_BANK_MASK; | |
351 | efr |= MOXA_MUST_EFR_BANK0; | |
352 | ||
353 | outb(efr, baseio + MOXA_MUST_EFR_REGISTER); | |
354 | outb(value, baseio + MOXA_MUST_XOFF1_REGISTER); | |
355 | outb(oldlcr, baseio + UART_LCR); | |
356 | } | |
357 | ||
358 | static void mxser_set_must_fifo_value(struct mxser_port *info) | |
359 | { | |
360 | u8 oldlcr; | |
361 | u8 efr; | |
362 | ||
363 | oldlcr = inb(info->ioaddr + UART_LCR); | |
364 | outb(MOXA_MUST_ENTER_ENCHANCE, info->ioaddr + UART_LCR); | |
365 | ||
366 | efr = inb(info->ioaddr + MOXA_MUST_EFR_REGISTER); | |
367 | efr &= ~MOXA_MUST_EFR_BANK_MASK; | |
368 | efr |= MOXA_MUST_EFR_BANK1; | |
369 | ||
370 | outb(efr, info->ioaddr + MOXA_MUST_EFR_REGISTER); | |
371 | outb((u8)info->rx_high_water, info->ioaddr + MOXA_MUST_RBRTH_REGISTER); | |
372 | outb((u8)info->rx_trigger, info->ioaddr + MOXA_MUST_RBRTI_REGISTER); | |
373 | outb((u8)info->rx_low_water, info->ioaddr + MOXA_MUST_RBRTL_REGISTER); | |
374 | outb(oldlcr, info->ioaddr + UART_LCR); | |
375 | } | |
376 | ||
377 | static void mxser_set_must_enum_value(unsigned long baseio, u8 value) | |
378 | { | |
379 | u8 oldlcr; | |
380 | u8 efr; | |
381 | ||
382 | oldlcr = inb(baseio + UART_LCR); | |
383 | outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); | |
384 | ||
385 | efr = inb(baseio + MOXA_MUST_EFR_REGISTER); | |
386 | efr &= ~MOXA_MUST_EFR_BANK_MASK; | |
387 | efr |= MOXA_MUST_EFR_BANK2; | |
388 | ||
389 | outb(efr, baseio + MOXA_MUST_EFR_REGISTER); | |
390 | outb(value, baseio + MOXA_MUST_ENUM_REGISTER); | |
391 | outb(oldlcr, baseio + UART_LCR); | |
392 | } | |
393 | ||
e89d67cf | 394 | #ifdef CONFIG_PCI |
148ff86b CH |
395 | static void mxser_get_must_hardware_id(unsigned long baseio, u8 *pId) |
396 | { | |
397 | u8 oldlcr; | |
398 | u8 efr; | |
399 | ||
400 | oldlcr = inb(baseio + UART_LCR); | |
401 | outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); | |
402 | ||
403 | efr = inb(baseio + MOXA_MUST_EFR_REGISTER); | |
404 | efr &= ~MOXA_MUST_EFR_BANK_MASK; | |
405 | efr |= MOXA_MUST_EFR_BANK2; | |
406 | ||
407 | outb(efr, baseio + MOXA_MUST_EFR_REGISTER); | |
408 | *pId = inb(baseio + MOXA_MUST_HWID_REGISTER); | |
409 | outb(oldlcr, baseio + UART_LCR); | |
410 | } | |
e89d67cf | 411 | #endif |
148ff86b CH |
412 | |
413 | static void SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(unsigned long baseio) | |
414 | { | |
415 | u8 oldlcr; | |
416 | u8 efr; | |
417 | ||
418 | oldlcr = inb(baseio + UART_LCR); | |
419 | outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); | |
420 | ||
421 | efr = inb(baseio + MOXA_MUST_EFR_REGISTER); | |
422 | efr &= ~MOXA_MUST_EFR_SF_MASK; | |
423 | ||
424 | outb(efr, baseio + MOXA_MUST_EFR_REGISTER); | |
425 | outb(oldlcr, baseio + UART_LCR); | |
426 | } | |
427 | ||
428 | static void mxser_enable_must_tx_software_flow_control(unsigned long baseio) | |
429 | { | |
430 | u8 oldlcr; | |
431 | u8 efr; | |
432 | ||
433 | oldlcr = inb(baseio + UART_LCR); | |
434 | outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); | |
435 | ||
436 | efr = inb(baseio + MOXA_MUST_EFR_REGISTER); | |
437 | efr &= ~MOXA_MUST_EFR_SF_TX_MASK; | |
438 | efr |= MOXA_MUST_EFR_SF_TX1; | |
439 | ||
440 | outb(efr, baseio + MOXA_MUST_EFR_REGISTER); | |
441 | outb(oldlcr, baseio + UART_LCR); | |
442 | } | |
443 | ||
444 | static void mxser_disable_must_tx_software_flow_control(unsigned long baseio) | |
445 | { | |
446 | u8 oldlcr; | |
447 | u8 efr; | |
448 | ||
449 | oldlcr = inb(baseio + UART_LCR); | |
450 | outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); | |
451 | ||
452 | efr = inb(baseio + MOXA_MUST_EFR_REGISTER); | |
453 | efr &= ~MOXA_MUST_EFR_SF_TX_MASK; | |
454 | ||
455 | outb(efr, baseio + MOXA_MUST_EFR_REGISTER); | |
456 | outb(oldlcr, baseio + UART_LCR); | |
457 | } | |
458 | ||
459 | static void mxser_enable_must_rx_software_flow_control(unsigned long baseio) | |
460 | { | |
461 | u8 oldlcr; | |
462 | u8 efr; | |
463 | ||
464 | oldlcr = inb(baseio + UART_LCR); | |
465 | outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); | |
466 | ||
467 | efr = inb(baseio + MOXA_MUST_EFR_REGISTER); | |
468 | efr &= ~MOXA_MUST_EFR_SF_RX_MASK; | |
469 | efr |= MOXA_MUST_EFR_SF_RX1; | |
470 | ||
471 | outb(efr, baseio + MOXA_MUST_EFR_REGISTER); | |
472 | outb(oldlcr, baseio + UART_LCR); | |
473 | } | |
474 | ||
475 | static void mxser_disable_must_rx_software_flow_control(unsigned long baseio) | |
476 | { | |
477 | u8 oldlcr; | |
478 | u8 efr; | |
479 | ||
480 | oldlcr = inb(baseio + UART_LCR); | |
481 | outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); | |
482 | ||
483 | efr = inb(baseio + MOXA_MUST_EFR_REGISTER); | |
484 | efr &= ~MOXA_MUST_EFR_SF_RX_MASK; | |
485 | ||
486 | outb(efr, baseio + MOXA_MUST_EFR_REGISTER); | |
487 | outb(oldlcr, baseio + UART_LCR); | |
488 | } | |
489 | ||
b8cc5549 | 490 | #ifdef CONFIG_PCI |
1c45607a | 491 | static int __devinit CheckIsMoxaMust(unsigned long io) |
1da177e4 LT |
492 | { |
493 | u8 oldmcr, hwid; | |
494 | int i; | |
495 | ||
496 | outb(0, io + UART_LCR); | |
148ff86b | 497 | mxser_disable_must_enchance_mode(io); |
1da177e4 LT |
498 | oldmcr = inb(io + UART_MCR); |
499 | outb(0, io + UART_MCR); | |
148ff86b | 500 | mxser_set_must_xon1_value(io, 0x11); |
1da177e4 LT |
501 | if ((hwid = inb(io + UART_MCR)) != 0) { |
502 | outb(oldmcr, io + UART_MCR); | |
8ea2c2ec | 503 | return MOXA_OTHER_UART; |
1da177e4 LT |
504 | } |
505 | ||
148ff86b | 506 | mxser_get_must_hardware_id(io, &hwid); |
1c45607a JS |
507 | for (i = 1; i < UART_INFO_NUM; i++) { /* 0 = OTHER_UART */ |
508 | if (hwid == Gpci_uart_info[i].type) | |
8ea2c2ec | 509 | return (int)hwid; |
1da177e4 LT |
510 | } |
511 | return MOXA_OTHER_UART; | |
512 | } | |
b8cc5549 | 513 | #endif |
1da177e4 | 514 | |
1c45607a | 515 | static void process_txrx_fifo(struct mxser_port *info) |
1da177e4 LT |
516 | { |
517 | int i; | |
518 | ||
519 | if ((info->type == PORT_16450) || (info->type == PORT_8250)) { | |
520 | info->rx_trigger = 1; | |
521 | info->rx_high_water = 1; | |
522 | info->rx_low_water = 1; | |
523 | info->xmit_fifo_size = 1; | |
1c45607a JS |
524 | } else |
525 | for (i = 0; i < UART_INFO_NUM; i++) | |
526 | if (info->board->chip_flag == Gpci_uart_info[i].type) { | |
1da177e4 LT |
527 | info->rx_trigger = Gpci_uart_info[i].rx_trigger; |
528 | info->rx_low_water = Gpci_uart_info[i].rx_low_water; | |
529 | info->rx_high_water = Gpci_uart_info[i].rx_high_water; | |
530 | info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size; | |
531 | break; | |
532 | } | |
1da177e4 LT |
533 | } |
534 | ||
1c45607a | 535 | static unsigned char mxser_get_msr(int baseaddr, int mode, int port) |
1da177e4 | 536 | { |
72800df9 | 537 | static unsigned char mxser_msr[MXSER_PORTS + 1]; |
1c45607a | 538 | unsigned char status = 0; |
1da177e4 | 539 | |
1c45607a | 540 | status = inb(baseaddr + UART_MSR); |
1da177e4 | 541 | |
1c45607a JS |
542 | mxser_msr[port] &= 0x0F; |
543 | mxser_msr[port] |= status; | |
544 | status = mxser_msr[port]; | |
545 | if (mode) | |
546 | mxser_msr[port] = 0; | |
1da177e4 | 547 | |
1c45607a JS |
548 | return status; |
549 | } | |
1da177e4 | 550 | |
31f35939 AC |
551 | static int mxser_carrier_raised(struct tty_port *port) |
552 | { | |
553 | struct mxser_port *mp = container_of(port, struct mxser_port, port); | |
554 | return (inb(mp->ioaddr + UART_MSR) & UART_MSR_DCD)?1:0; | |
555 | } | |
556 | ||
fcc8ac18 | 557 | static void mxser_dtr_rts(struct tty_port *port, int on) |
5d951fb4 AC |
558 | { |
559 | struct mxser_port *mp = container_of(port, struct mxser_port, port); | |
560 | unsigned long flags; | |
561 | ||
562 | spin_lock_irqsave(&mp->slock, flags); | |
fcc8ac18 AC |
563 | if (on) |
564 | outb(inb(mp->ioaddr + UART_MCR) | | |
565 | UART_MCR_DTR | UART_MCR_RTS, mp->ioaddr + UART_MCR); | |
566 | else | |
567 | outb(inb(mp->ioaddr + UART_MCR)&~(UART_MCR_DTR | UART_MCR_RTS), | |
568 | mp->ioaddr + UART_MCR); | |
5d951fb4 AC |
569 | spin_unlock_irqrestore(&mp->slock, flags); |
570 | } | |
571 | ||
216ba023 | 572 | static int mxser_set_baud(struct tty_struct *tty, long newspd) |
1da177e4 | 573 | { |
216ba023 | 574 | struct mxser_port *info = tty->driver_data; |
1c45607a JS |
575 | int quot = 0, baud; |
576 | unsigned char cval; | |
1da177e4 | 577 | |
216ba023 | 578 | if (!info->ioaddr) |
1c45607a | 579 | return -1; |
1da177e4 | 580 | |
1c45607a JS |
581 | if (newspd > info->max_baud) |
582 | return -1; | |
1da177e4 | 583 | |
1c45607a JS |
584 | if (newspd == 134) { |
585 | quot = 2 * info->baud_base / 269; | |
216ba023 | 586 | tty_encode_baud_rate(tty, 134, 134); |
1c45607a JS |
587 | } else if (newspd) { |
588 | quot = info->baud_base / newspd; | |
589 | if (quot == 0) | |
590 | quot = 1; | |
591 | baud = info->baud_base/quot; | |
216ba023 | 592 | tty_encode_baud_rate(tty, baud, baud); |
1c45607a JS |
593 | } else { |
594 | quot = 0; | |
595 | } | |
1da177e4 | 596 | |
1c45607a JS |
597 | info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base); |
598 | info->timeout += HZ / 50; /* Add .02 seconds of slop */ | |
1da177e4 | 599 | |
1c45607a JS |
600 | if (quot) { |
601 | info->MCR |= UART_MCR_DTR; | |
602 | outb(info->MCR, info->ioaddr + UART_MCR); | |
603 | } else { | |
604 | info->MCR &= ~UART_MCR_DTR; | |
605 | outb(info->MCR, info->ioaddr + UART_MCR); | |
606 | return 0; | |
607 | } | |
1da177e4 | 608 | |
1c45607a | 609 | cval = inb(info->ioaddr + UART_LCR); |
1da177e4 | 610 | |
1c45607a | 611 | outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR); /* set DLAB */ |
1da177e4 | 612 | |
1c45607a JS |
613 | outb(quot & 0xff, info->ioaddr + UART_DLL); /* LS of divisor */ |
614 | outb(quot >> 8, info->ioaddr + UART_DLM); /* MS of divisor */ | |
615 | outb(cval, info->ioaddr + UART_LCR); /* reset DLAB */ | |
1da177e4 | 616 | |
1c45607a | 617 | #ifdef BOTHER |
216ba023 | 618 | if (C_BAUD(tty) == BOTHER) { |
1c45607a JS |
619 | quot = info->baud_base % newspd; |
620 | quot *= 8; | |
621 | if (quot % newspd > newspd / 2) { | |
622 | quot /= newspd; | |
623 | quot++; | |
624 | } else | |
625 | quot /= newspd; | |
626 | ||
148ff86b | 627 | mxser_set_must_enum_value(info->ioaddr, quot); |
1c45607a JS |
628 | } else |
629 | #endif | |
148ff86b | 630 | mxser_set_must_enum_value(info->ioaddr, 0); |
1da177e4 | 631 | |
8ea2c2ec | 632 | return 0; |
1da177e4 | 633 | } |
1da177e4 | 634 | |
1c45607a JS |
635 | /* |
636 | * This routine is called to set the UART divisor registers to match | |
637 | * the specified baud rate for a serial port. | |
638 | */ | |
216ba023 AC |
639 | static int mxser_change_speed(struct tty_struct *tty, |
640 | struct ktermios *old_termios) | |
1da177e4 | 641 | { |
216ba023 | 642 | struct mxser_port *info = tty->driver_data; |
1c45607a JS |
643 | unsigned cflag, cval, fcr; |
644 | int ret = 0; | |
645 | unsigned char status; | |
1da177e4 | 646 | |
216ba023 AC |
647 | cflag = tty->termios->c_cflag; |
648 | if (!info->ioaddr) | |
1c45607a | 649 | return ret; |
1da177e4 | 650 | |
216ba023 AC |
651 | if (mxser_set_baud_method[tty->index] == 0) |
652 | mxser_set_baud(tty, tty_get_baud_rate(tty)); | |
1da177e4 | 653 | |
1c45607a JS |
654 | /* byte size and parity */ |
655 | switch (cflag & CSIZE) { | |
656 | case CS5: | |
657 | cval = 0x00; | |
658 | break; | |
659 | case CS6: | |
660 | cval = 0x01; | |
661 | break; | |
662 | case CS7: | |
663 | cval = 0x02; | |
664 | break; | |
665 | case CS8: | |
666 | cval = 0x03; | |
667 | break; | |
668 | default: | |
669 | cval = 0x00; | |
670 | break; /* too keep GCC shut... */ | |
671 | } | |
672 | if (cflag & CSTOPB) | |
673 | cval |= 0x04; | |
674 | if (cflag & PARENB) | |
675 | cval |= UART_LCR_PARITY; | |
676 | if (!(cflag & PARODD)) | |
677 | cval |= UART_LCR_EPAR; | |
678 | if (cflag & CMSPAR) | |
679 | cval |= UART_LCR_SPAR; | |
1da177e4 | 680 | |
1c45607a JS |
681 | if ((info->type == PORT_8250) || (info->type == PORT_16450)) { |
682 | if (info->board->chip_flag) { | |
683 | fcr = UART_FCR_ENABLE_FIFO; | |
684 | fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE; | |
148ff86b | 685 | mxser_set_must_fifo_value(info); |
1c45607a JS |
686 | } else |
687 | fcr = 0; | |
688 | } else { | |
689 | fcr = UART_FCR_ENABLE_FIFO; | |
690 | if (info->board->chip_flag) { | |
691 | fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE; | |
148ff86b | 692 | mxser_set_must_fifo_value(info); |
1c45607a JS |
693 | } else { |
694 | switch (info->rx_trigger) { | |
695 | case 1: | |
696 | fcr |= UART_FCR_TRIGGER_1; | |
697 | break; | |
698 | case 4: | |
699 | fcr |= UART_FCR_TRIGGER_4; | |
700 | break; | |
701 | case 8: | |
702 | fcr |= UART_FCR_TRIGGER_8; | |
703 | break; | |
704 | default: | |
705 | fcr |= UART_FCR_TRIGGER_14; | |
706 | break; | |
707 | } | |
1da177e4 | 708 | } |
1da177e4 LT |
709 | } |
710 | ||
1c45607a JS |
711 | /* CTS flow control flag and modem status interrupts */ |
712 | info->IER &= ~UART_IER_MSI; | |
713 | info->MCR &= ~UART_MCR_AFE; | |
714 | if (cflag & CRTSCTS) { | |
0ad9e7d1 | 715 | info->port.flags |= ASYNC_CTS_FLOW; |
1c45607a JS |
716 | info->IER |= UART_IER_MSI; |
717 | if ((info->type == PORT_16550A) || (info->board->chip_flag)) { | |
718 | info->MCR |= UART_MCR_AFE; | |
719 | } else { | |
720 | status = inb(info->ioaddr + UART_MSR); | |
216ba023 | 721 | if (tty->hw_stopped) { |
1c45607a | 722 | if (status & UART_MSR_CTS) { |
216ba023 | 723 | tty->hw_stopped = 0; |
1c45607a JS |
724 | if (info->type != PORT_16550A && |
725 | !info->board->chip_flag) { | |
726 | outb(info->IER & ~UART_IER_THRI, | |
727 | info->ioaddr + | |
728 | UART_IER); | |
729 | info->IER |= UART_IER_THRI; | |
730 | outb(info->IER, info->ioaddr + | |
731 | UART_IER); | |
732 | } | |
216ba023 | 733 | tty_wakeup(tty); |
1c45607a JS |
734 | } |
735 | } else { | |
736 | if (!(status & UART_MSR_CTS)) { | |
216ba023 | 737 | tty->hw_stopped = 1; |
1c45607a JS |
738 | if ((info->type != PORT_16550A) && |
739 | (!info->board->chip_flag)) { | |
740 | info->IER &= ~UART_IER_THRI; | |
741 | outb(info->IER, info->ioaddr + | |
742 | UART_IER); | |
743 | } | |
744 | } | |
745 | } | |
1da177e4 | 746 | } |
1c45607a | 747 | } else { |
0ad9e7d1 | 748 | info->port.flags &= ~ASYNC_CTS_FLOW; |
1c45607a JS |
749 | } |
750 | outb(info->MCR, info->ioaddr + UART_MCR); | |
751 | if (cflag & CLOCAL) { | |
0ad9e7d1 | 752 | info->port.flags &= ~ASYNC_CHECK_CD; |
1c45607a | 753 | } else { |
0ad9e7d1 | 754 | info->port.flags |= ASYNC_CHECK_CD; |
1c45607a JS |
755 | info->IER |= UART_IER_MSI; |
756 | } | |
757 | outb(info->IER, info->ioaddr + UART_IER); | |
758 | ||
759 | /* | |
760 | * Set up parity check flag | |
761 | */ | |
762 | info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR; | |
216ba023 | 763 | if (I_INPCK(tty)) |
1c45607a | 764 | info->read_status_mask |= UART_LSR_FE | UART_LSR_PE; |
216ba023 | 765 | if (I_BRKINT(tty) || I_PARMRK(tty)) |
1c45607a | 766 | info->read_status_mask |= UART_LSR_BI; |
1da177e4 | 767 | |
1c45607a | 768 | info->ignore_status_mask = 0; |
1da177e4 | 769 | |
216ba023 | 770 | if (I_IGNBRK(tty)) { |
1c45607a JS |
771 | info->ignore_status_mask |= UART_LSR_BI; |
772 | info->read_status_mask |= UART_LSR_BI; | |
8ea2c2ec | 773 | /* |
1c45607a JS |
774 | * If we're ignore parity and break indicators, ignore |
775 | * overruns too. (For real raw support). | |
8ea2c2ec | 776 | */ |
216ba023 | 777 | if (I_IGNPAR(tty)) { |
1c45607a JS |
778 | info->ignore_status_mask |= |
779 | UART_LSR_OE | | |
780 | UART_LSR_PE | | |
781 | UART_LSR_FE; | |
782 | info->read_status_mask |= | |
783 | UART_LSR_OE | | |
784 | UART_LSR_PE | | |
785 | UART_LSR_FE; | |
786 | } | |
1da177e4 | 787 | } |
1c45607a | 788 | if (info->board->chip_flag) { |
216ba023 AC |
789 | mxser_set_must_xon1_value(info->ioaddr, START_CHAR(tty)); |
790 | mxser_set_must_xoff1_value(info->ioaddr, STOP_CHAR(tty)); | |
791 | if (I_IXON(tty)) { | |
148ff86b CH |
792 | mxser_enable_must_rx_software_flow_control( |
793 | info->ioaddr); | |
1c45607a | 794 | } else { |
148ff86b CH |
795 | mxser_disable_must_rx_software_flow_control( |
796 | info->ioaddr); | |
1da177e4 | 797 | } |
216ba023 | 798 | if (I_IXOFF(tty)) { |
148ff86b CH |
799 | mxser_enable_must_tx_software_flow_control( |
800 | info->ioaddr); | |
1c45607a | 801 | } else { |
148ff86b CH |
802 | mxser_disable_must_tx_software_flow_control( |
803 | info->ioaddr); | |
1da177e4 LT |
804 | } |
805 | } | |
1da177e4 | 806 | |
1da177e4 | 807 | |
1c45607a JS |
808 | outb(fcr, info->ioaddr + UART_FCR); /* set fcr */ |
809 | outb(cval, info->ioaddr + UART_LCR); | |
1da177e4 | 810 | |
1c45607a | 811 | return ret; |
1da177e4 LT |
812 | } |
813 | ||
216ba023 AC |
814 | static void mxser_check_modem_status(struct tty_struct *tty, |
815 | struct mxser_port *port, int status) | |
1da177e4 | 816 | { |
1c45607a JS |
817 | /* update input line counters */ |
818 | if (status & UART_MSR_TERI) | |
819 | port->icount.rng++; | |
820 | if (status & UART_MSR_DDSR) | |
821 | port->icount.dsr++; | |
822 | if (status & UART_MSR_DDCD) | |
823 | port->icount.dcd++; | |
824 | if (status & UART_MSR_DCTS) | |
825 | port->icount.cts++; | |
826 | port->mon_data.modem_status = status; | |
bdc04e31 | 827 | wake_up_interruptible(&port->port.delta_msr_wait); |
1da177e4 | 828 | |
0ad9e7d1 | 829 | if ((port->port.flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) { |
1c45607a | 830 | if (status & UART_MSR_DCD) |
0ad9e7d1 | 831 | wake_up_interruptible(&port->port.open_wait); |
1c45607a | 832 | } |
1da177e4 | 833 | |
0ad9e7d1 | 834 | if (port->port.flags & ASYNC_CTS_FLOW) { |
216ba023 | 835 | if (tty->hw_stopped) { |
1c45607a | 836 | if (status & UART_MSR_CTS) { |
216ba023 | 837 | tty->hw_stopped = 0; |
1c45607a JS |
838 | |
839 | if ((port->type != PORT_16550A) && | |
840 | (!port->board->chip_flag)) { | |
841 | outb(port->IER & ~UART_IER_THRI, | |
842 | port->ioaddr + UART_IER); | |
843 | port->IER |= UART_IER_THRI; | |
844 | outb(port->IER, port->ioaddr + | |
845 | UART_IER); | |
846 | } | |
216ba023 | 847 | tty_wakeup(tty); |
1c45607a JS |
848 | } |
849 | } else { | |
850 | if (!(status & UART_MSR_CTS)) { | |
216ba023 | 851 | tty->hw_stopped = 1; |
1c45607a JS |
852 | if (port->type != PORT_16550A && |
853 | !port->board->chip_flag) { | |
854 | port->IER &= ~UART_IER_THRI; | |
855 | outb(port->IER, port->ioaddr + | |
856 | UART_IER); | |
857 | } | |
858 | } | |
859 | } | |
1da177e4 LT |
860 | } |
861 | } | |
862 | ||
6769140d | 863 | static int mxser_activate(struct tty_port *port, struct tty_struct *tty) |
1da177e4 | 864 | { |
6769140d | 865 | struct mxser_port *info = container_of(port, struct mxser_port, port); |
1c45607a JS |
866 | unsigned long page; |
867 | unsigned long flags; | |
1da177e4 | 868 | |
1c45607a JS |
869 | page = __get_free_page(GFP_KERNEL); |
870 | if (!page) | |
871 | return -ENOMEM; | |
1da177e4 | 872 | |
1c45607a | 873 | spin_lock_irqsave(&info->slock, flags); |
1da177e4 | 874 | |
1c45607a | 875 | if (!info->ioaddr || !info->type) { |
216ba023 | 876 | set_bit(TTY_IO_ERROR, &tty->flags); |
1c45607a JS |
877 | free_page(page); |
878 | spin_unlock_irqrestore(&info->slock, flags); | |
1da177e4 | 879 | return 0; |
1c45607a | 880 | } |
6769140d | 881 | info->port.xmit_buf = (unsigned char *) page; |
1da177e4 | 882 | |
1da177e4 | 883 | /* |
1c45607a JS |
884 | * Clear the FIFO buffers and disable them |
885 | * (they will be reenabled in mxser_change_speed()) | |
1da177e4 | 886 | */ |
1c45607a JS |
887 | if (info->board->chip_flag) |
888 | outb((UART_FCR_CLEAR_RCVR | | |
889 | UART_FCR_CLEAR_XMIT | | |
890 | MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR); | |
891 | else | |
892 | outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT), | |
893 | info->ioaddr + UART_FCR); | |
1da177e4 | 894 | |
1c45607a JS |
895 | /* |
896 | * At this point there's no way the LSR could still be 0xFF; | |
897 | * if it is, then bail out, because there's likely no UART | |
898 | * here. | |
899 | */ | |
900 | if (inb(info->ioaddr + UART_LSR) == 0xff) { | |
901 | spin_unlock_irqrestore(&info->slock, flags); | |
902 | if (capable(CAP_SYS_ADMIN)) { | |
f43a510d | 903 | set_bit(TTY_IO_ERROR, &tty->flags); |
1c45607a JS |
904 | return 0; |
905 | } else | |
906 | return -ENODEV; | |
907 | } | |
1da177e4 | 908 | |
1c45607a JS |
909 | /* |
910 | * Clear the interrupt registers. | |
911 | */ | |
912 | (void) inb(info->ioaddr + UART_LSR); | |
913 | (void) inb(info->ioaddr + UART_RX); | |
914 | (void) inb(info->ioaddr + UART_IIR); | |
915 | (void) inb(info->ioaddr + UART_MSR); | |
916 | ||
917 | /* | |
918 | * Now, initialize the UART | |
919 | */ | |
920 | outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR); /* reset DLAB */ | |
921 | info->MCR = UART_MCR_DTR | UART_MCR_RTS; | |
922 | outb(info->MCR, info->ioaddr + UART_MCR); | |
923 | ||
924 | /* | |
925 | * Finally, enable interrupts | |
926 | */ | |
927 | info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI; | |
928 | ||
929 | if (info->board->chip_flag) | |
930 | info->IER |= MOXA_MUST_IER_EGDAI; | |
931 | outb(info->IER, info->ioaddr + UART_IER); /* enable interrupts */ | |
932 | ||
933 | /* | |
934 | * And clear the interrupt registers again for luck. | |
935 | */ | |
936 | (void) inb(info->ioaddr + UART_LSR); | |
937 | (void) inb(info->ioaddr + UART_RX); | |
938 | (void) inb(info->ioaddr + UART_IIR); | |
939 | (void) inb(info->ioaddr + UART_MSR); | |
940 | ||
216ba023 | 941 | clear_bit(TTY_IO_ERROR, &tty->flags); |
1c45607a JS |
942 | info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; |
943 | ||
944 | /* | |
945 | * and set the speed of the serial port | |
946 | */ | |
216ba023 | 947 | mxser_change_speed(tty, NULL); |
1c45607a JS |
948 | spin_unlock_irqrestore(&info->slock, flags); |
949 | ||
950 | return 0; | |
951 | } | |
952 | ||
953 | /* | |
6769140d | 954 | * This routine will shutdown a serial port |
1c45607a | 955 | */ |
6769140d | 956 | static void mxser_shutdown_port(struct tty_port *port) |
1c45607a | 957 | { |
6769140d | 958 | struct mxser_port *info = container_of(port, struct mxser_port, port); |
1c45607a JS |
959 | unsigned long flags; |
960 | ||
1c45607a JS |
961 | spin_lock_irqsave(&info->slock, flags); |
962 | ||
963 | /* | |
964 | * clear delta_msr_wait queue to avoid mem leaks: we may free the irq | |
965 | * here so the queue might never be waken up | |
966 | */ | |
bdc04e31 | 967 | wake_up_interruptible(&info->port.delta_msr_wait); |
1c45607a JS |
968 | |
969 | /* | |
6769140d | 970 | * Free the xmit buffer, if necessary |
1c45607a | 971 | */ |
0ad9e7d1 AC |
972 | if (info->port.xmit_buf) { |
973 | free_page((unsigned long) info->port.xmit_buf); | |
974 | info->port.xmit_buf = NULL; | |
1da177e4 LT |
975 | } |
976 | ||
1c45607a JS |
977 | info->IER = 0; |
978 | outb(0x00, info->ioaddr + UART_IER); | |
979 | ||
1c45607a JS |
980 | /* clear Rx/Tx FIFO's */ |
981 | if (info->board->chip_flag) | |
982 | outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT | | |
983 | MOXA_MUST_FCR_GDA_MODE_ENABLE, | |
984 | info->ioaddr + UART_FCR); | |
985 | else | |
986 | outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT, | |
987 | info->ioaddr + UART_FCR); | |
988 | ||
989 | /* read data port to reset things */ | |
990 | (void) inb(info->ioaddr + UART_RX); | |
991 | ||
1c45607a JS |
992 | |
993 | if (info->board->chip_flag) | |
994 | SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr); | |
995 | ||
996 | spin_unlock_irqrestore(&info->slock, flags); | |
997 | } | |
998 | ||
999 | /* | |
1000 | * This routine is called whenever a serial port is opened. It | |
1001 | * enables interrupts for a serial port, linking in its async structure into | |
1002 | * the IRQ chain. It also performs the serial-specific | |
1003 | * initialization for the tty structure. | |
1004 | */ | |
1005 | static int mxser_open(struct tty_struct *tty, struct file *filp) | |
1006 | { | |
1007 | struct mxser_port *info; | |
6769140d | 1008 | int line; |
1c45607a JS |
1009 | |
1010 | line = tty->index; | |
1011 | if (line == MXSER_PORTS) | |
1012 | return 0; | |
1013 | if (line < 0 || line > MXSER_PORTS) | |
1014 | return -ENODEV; | |
1015 | info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD]; | |
1016 | if (!info->ioaddr) | |
1017 | return -ENODEV; | |
1018 | ||
a2d1e351 | 1019 | tty->driver_data = info; |
6769140d | 1020 | return tty_port_open(&info->port, tty, filp); |
1da177e4 LT |
1021 | } |
1022 | ||
978e595f AC |
1023 | static void mxser_flush_buffer(struct tty_struct *tty) |
1024 | { | |
1025 | struct mxser_port *info = tty->driver_data; | |
1026 | char fcr; | |
1027 | unsigned long flags; | |
1028 | ||
1029 | ||
1030 | spin_lock_irqsave(&info->slock, flags); | |
1031 | info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; | |
1032 | ||
1033 | fcr = inb(info->ioaddr + UART_FCR); | |
1034 | outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT), | |
1035 | info->ioaddr + UART_FCR); | |
1036 | outb(fcr, info->ioaddr + UART_FCR); | |
1037 | ||
1038 | spin_unlock_irqrestore(&info->slock, flags); | |
1039 | ||
1040 | tty_wakeup(tty); | |
1041 | } | |
1042 | ||
1043 | ||
6769140d | 1044 | static void mxser_close_port(struct tty_port *port) |
1da177e4 | 1045 | { |
1e2b0254 | 1046 | struct mxser_port *info = container_of(port, struct mxser_port, port); |
1da177e4 | 1047 | unsigned long timeout; |
1da177e4 LT |
1048 | /* |
1049 | * At this point we stop accepting input. To do this, we | |
1050 | * disable the receive line status interrupts, and tell the | |
1051 | * interrupt driver to stop checking the data ready bit in the | |
1052 | * line status register. | |
1053 | */ | |
1054 | info->IER &= ~UART_IER_RLSI; | |
1c45607a | 1055 | if (info->board->chip_flag) |
1da177e4 | 1056 | info->IER &= ~MOXA_MUST_RECV_ISR; |
1c45607a | 1057 | |
6769140d AC |
1058 | outb(info->IER, info->ioaddr + UART_IER); |
1059 | /* | |
1060 | * Before we drop DTR, make sure the UART transmitter | |
1061 | * has completely drained; this is especially | |
1062 | * important if there is a transmit FIFO! | |
1063 | */ | |
1064 | timeout = jiffies + HZ; | |
1065 | while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) { | |
1066 | schedule_timeout_interruptible(5); | |
1067 | if (time_after(jiffies, timeout)) | |
1068 | break; | |
1da177e4 | 1069 | } |
1e2b0254 AC |
1070 | } |
1071 | ||
1072 | /* | |
1073 | * This routine is called when the serial port gets closed. First, we | |
1074 | * wait for the last remaining data to be sent. Then, we unlink its | |
1075 | * async structure from the interrupt chain if necessary, and we free | |
1076 | * that IRQ if nothing is left in the chain. | |
1077 | */ | |
1078 | static void mxser_close(struct tty_struct *tty, struct file *filp) | |
1079 | { | |
1080 | struct mxser_port *info = tty->driver_data; | |
1081 | struct tty_port *port = &info->port; | |
1082 | ||
a2d1e351 | 1083 | if (tty->index == MXSER_PORTS || info == NULL) |
1e2b0254 AC |
1084 | return; |
1085 | if (tty_port_close_start(port, tty, filp) == 0) | |
1086 | return; | |
6769140d AC |
1087 | mutex_lock(&port->mutex); |
1088 | mxser_close_port(port); | |
1e2b0254 | 1089 | mxser_flush_buffer(tty); |
6769140d AC |
1090 | mxser_shutdown_port(port); |
1091 | clear_bit(ASYNCB_INITIALIZED, &port->flags); | |
1092 | mutex_unlock(&port->mutex); | |
a6614999 AC |
1093 | /* Right now the tty_port set is done outside of the close_end helper |
1094 | as we don't yet have everyone using refcounts */ | |
1095 | tty_port_close_end(port, tty); | |
1096 | tty_port_tty_set(port, NULL); | |
1da177e4 LT |
1097 | } |
1098 | ||
1099 | static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count) | |
1100 | { | |
1101 | int c, total = 0; | |
1c45607a | 1102 | struct mxser_port *info = tty->driver_data; |
1da177e4 LT |
1103 | unsigned long flags; |
1104 | ||
0ad9e7d1 | 1105 | if (!info->port.xmit_buf) |
8ea2c2ec | 1106 | return 0; |
1da177e4 LT |
1107 | |
1108 | while (1) { | |
8ea2c2ec JJ |
1109 | c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1, |
1110 | SERIAL_XMIT_SIZE - info->xmit_head)); | |
1da177e4 LT |
1111 | if (c <= 0) |
1112 | break; | |
1113 | ||
0ad9e7d1 | 1114 | memcpy(info->port.xmit_buf + info->xmit_head, buf, c); |
1da177e4 | 1115 | spin_lock_irqsave(&info->slock, flags); |
8ea2c2ec JJ |
1116 | info->xmit_head = (info->xmit_head + c) & |
1117 | (SERIAL_XMIT_SIZE - 1); | |
1da177e4 LT |
1118 | info->xmit_cnt += c; |
1119 | spin_unlock_irqrestore(&info->slock, flags); | |
1120 | ||
1121 | buf += c; | |
1122 | count -= c; | |
1123 | total += c; | |
1da177e4 LT |
1124 | } |
1125 | ||
1c45607a | 1126 | if (info->xmit_cnt && !tty->stopped) { |
8ea2c2ec JJ |
1127 | if (!tty->hw_stopped || |
1128 | (info->type == PORT_16550A) || | |
1c45607a | 1129 | (info->board->chip_flag)) { |
1da177e4 | 1130 | spin_lock_irqsave(&info->slock, flags); |
1c45607a JS |
1131 | outb(info->IER & ~UART_IER_THRI, info->ioaddr + |
1132 | UART_IER); | |
1da177e4 | 1133 | info->IER |= UART_IER_THRI; |
1c45607a | 1134 | outb(info->IER, info->ioaddr + UART_IER); |
1da177e4 LT |
1135 | spin_unlock_irqrestore(&info->slock, flags); |
1136 | } | |
1137 | } | |
1138 | return total; | |
1139 | } | |
1140 | ||
0be2eade | 1141 | static int mxser_put_char(struct tty_struct *tty, unsigned char ch) |
1da177e4 | 1142 | { |
1c45607a | 1143 | struct mxser_port *info = tty->driver_data; |
1da177e4 LT |
1144 | unsigned long flags; |
1145 | ||
0ad9e7d1 | 1146 | if (!info->port.xmit_buf) |
0be2eade | 1147 | return 0; |
1da177e4 LT |
1148 | |
1149 | if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1) | |
0be2eade | 1150 | return 0; |
1da177e4 LT |
1151 | |
1152 | spin_lock_irqsave(&info->slock, flags); | |
0ad9e7d1 | 1153 | info->port.xmit_buf[info->xmit_head++] = ch; |
1da177e4 LT |
1154 | info->xmit_head &= SERIAL_XMIT_SIZE - 1; |
1155 | info->xmit_cnt++; | |
1156 | spin_unlock_irqrestore(&info->slock, flags); | |
1c45607a | 1157 | if (!tty->stopped) { |
8ea2c2ec JJ |
1158 | if (!tty->hw_stopped || |
1159 | (info->type == PORT_16550A) || | |
1c45607a | 1160 | info->board->chip_flag) { |
1da177e4 | 1161 | spin_lock_irqsave(&info->slock, flags); |
1c45607a | 1162 | outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER); |
1da177e4 | 1163 | info->IER |= UART_IER_THRI; |
1c45607a | 1164 | outb(info->IER, info->ioaddr + UART_IER); |
1da177e4 LT |
1165 | spin_unlock_irqrestore(&info->slock, flags); |
1166 | } | |
1167 | } | |
0be2eade | 1168 | return 1; |
1da177e4 LT |
1169 | } |
1170 | ||
1171 | ||
1172 | static void mxser_flush_chars(struct tty_struct *tty) | |
1173 | { | |
1c45607a | 1174 | struct mxser_port *info = tty->driver_data; |
1da177e4 LT |
1175 | unsigned long flags; |
1176 | ||
ace7dd96 JS |
1177 | if (info->xmit_cnt <= 0 || tty->stopped || !info->port.xmit_buf || |
1178 | (tty->hw_stopped && info->type != PORT_16550A && | |
1179 | !info->board->chip_flag)) | |
1da177e4 LT |
1180 | return; |
1181 | ||
1182 | spin_lock_irqsave(&info->slock, flags); | |
1183 | ||
1c45607a | 1184 | outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER); |
1da177e4 | 1185 | info->IER |= UART_IER_THRI; |
1c45607a | 1186 | outb(info->IER, info->ioaddr + UART_IER); |
1da177e4 LT |
1187 | |
1188 | spin_unlock_irqrestore(&info->slock, flags); | |
1189 | } | |
1190 | ||
1191 | static int mxser_write_room(struct tty_struct *tty) | |
1192 | { | |
1c45607a | 1193 | struct mxser_port *info = tty->driver_data; |
1da177e4 LT |
1194 | int ret; |
1195 | ||
1196 | ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1; | |
ace7dd96 | 1197 | return ret < 0 ? 0 : ret; |
1da177e4 LT |
1198 | } |
1199 | ||
1200 | static int mxser_chars_in_buffer(struct tty_struct *tty) | |
1201 | { | |
1c45607a | 1202 | struct mxser_port *info = tty->driver_data; |
1da177e4 LT |
1203 | return info->xmit_cnt; |
1204 | } | |
1205 | ||
1c45607a JS |
1206 | /* |
1207 | * ------------------------------------------------------------ | |
1208 | * friends of mxser_ioctl() | |
1209 | * ------------------------------------------------------------ | |
1210 | */ | |
216ba023 | 1211 | static int mxser_get_serial_info(struct tty_struct *tty, |
1c45607a JS |
1212 | struct serial_struct __user *retinfo) |
1213 | { | |
216ba023 | 1214 | struct mxser_port *info = tty->driver_data; |
1c45607a JS |
1215 | struct serial_struct tmp = { |
1216 | .type = info->type, | |
216ba023 | 1217 | .line = tty->index, |
1c45607a JS |
1218 | .port = info->ioaddr, |
1219 | .irq = info->board->irq, | |
0ad9e7d1 | 1220 | .flags = info->port.flags, |
1c45607a | 1221 | .baud_base = info->baud_base, |
44b7d1b3 AC |
1222 | .close_delay = info->port.close_delay, |
1223 | .closing_wait = info->port.closing_wait, | |
1c45607a JS |
1224 | .custom_divisor = info->custom_divisor, |
1225 | .hub6 = 0 | |
1226 | }; | |
1227 | if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) | |
1228 | return -EFAULT; | |
1229 | return 0; | |
1230 | } | |
1231 | ||
216ba023 | 1232 | static int mxser_set_serial_info(struct tty_struct *tty, |
1c45607a | 1233 | struct serial_struct __user *new_info) |
1da177e4 | 1234 | { |
216ba023 | 1235 | struct mxser_port *info = tty->driver_data; |
07f86c03 | 1236 | struct tty_port *port = &info->port; |
1c45607a | 1237 | struct serial_struct new_serial; |
80ff8a80 | 1238 | speed_t baud; |
1c45607a JS |
1239 | unsigned long sl_flags; |
1240 | unsigned int flags; | |
1241 | int retval = 0; | |
1da177e4 | 1242 | |
1c45607a | 1243 | if (!new_info || !info->ioaddr) |
80ff8a80 | 1244 | return -ENODEV; |
1c45607a JS |
1245 | if (copy_from_user(&new_serial, new_info, sizeof(new_serial))) |
1246 | return -EFAULT; | |
1da177e4 | 1247 | |
80ff8a80 JS |
1248 | if (new_serial.irq != info->board->irq || |
1249 | new_serial.port != info->ioaddr) | |
1250 | return -EINVAL; | |
1da177e4 | 1251 | |
07f86c03 | 1252 | flags = port->flags & ASYNC_SPD_MASK; |
1da177e4 | 1253 | |
1c45607a JS |
1254 | if (!capable(CAP_SYS_ADMIN)) { |
1255 | if ((new_serial.baud_base != info->baud_base) || | |
44b7d1b3 | 1256 | (new_serial.close_delay != info->port.close_delay) || |
0ad9e7d1 | 1257 | ((new_serial.flags & ~ASYNC_USR_MASK) != (info->port.flags & ~ASYNC_USR_MASK))) |
1c45607a | 1258 | return -EPERM; |
0ad9e7d1 | 1259 | info->port.flags = ((info->port.flags & ~ASYNC_USR_MASK) | |
1c45607a JS |
1260 | (new_serial.flags & ASYNC_USR_MASK)); |
1261 | } else { | |
1da177e4 | 1262 | /* |
1c45607a JS |
1263 | * OK, past this point, all the error checking has been done. |
1264 | * At this point, we start making changes..... | |
1da177e4 | 1265 | */ |
07f86c03 | 1266 | port->flags = ((port->flags & ~ASYNC_FLAGS) | |
1c45607a | 1267 | (new_serial.flags & ASYNC_FLAGS)); |
07f86c03 AC |
1268 | port->close_delay = new_serial.close_delay * HZ / 100; |
1269 | port->closing_wait = new_serial.closing_wait * HZ / 100; | |
1270 | tty->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0; | |
1271 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST && | |
80ff8a80 JS |
1272 | (new_serial.baud_base != info->baud_base || |
1273 | new_serial.custom_divisor != | |
1274 | info->custom_divisor)) { | |
07f86c03 AC |
1275 | if (new_serial.custom_divisor == 0) |
1276 | return -EINVAL; | |
80ff8a80 | 1277 | baud = new_serial.baud_base / new_serial.custom_divisor; |
216ba023 | 1278 | tty_encode_baud_rate(tty, baud, baud); |
80ff8a80 | 1279 | } |
1c45607a | 1280 | } |
fc83815c | 1281 | |
1c45607a | 1282 | info->type = new_serial.type; |
1da177e4 | 1283 | |
1c45607a JS |
1284 | process_txrx_fifo(info); |
1285 | ||
07f86c03 AC |
1286 | if (test_bit(ASYNCB_INITIALIZED, &port->flags)) { |
1287 | if (flags != (port->flags & ASYNC_SPD_MASK)) { | |
1c45607a | 1288 | spin_lock_irqsave(&info->slock, sl_flags); |
216ba023 | 1289 | mxser_change_speed(tty, NULL); |
1c45607a | 1290 | spin_unlock_irqrestore(&info->slock, sl_flags); |
1da177e4 | 1291 | } |
6769140d | 1292 | } else { |
07f86c03 | 1293 | retval = mxser_activate(port, tty); |
6769140d | 1294 | if (retval == 0) |
07f86c03 | 1295 | set_bit(ASYNCB_INITIALIZED, &port->flags); |
6769140d | 1296 | } |
1c45607a JS |
1297 | return retval; |
1298 | } | |
1da177e4 | 1299 | |
1c45607a JS |
1300 | /* |
1301 | * mxser_get_lsr_info - get line status register info | |
1302 | * | |
1303 | * Purpose: Let user call ioctl() to get info when the UART physically | |
1304 | * is emptied. On bus types like RS485, the transmitter must | |
1305 | * release the bus after transmitting. This must be done when | |
1306 | * the transmit shift register is empty, not be done when the | |
1307 | * transmit holding register is empty. This functionality | |
1308 | * allows an RS485 driver to be written in user space. | |
1309 | */ | |
1310 | static int mxser_get_lsr_info(struct mxser_port *info, | |
1311 | unsigned int __user *value) | |
1312 | { | |
1313 | unsigned char status; | |
1314 | unsigned int result; | |
1315 | unsigned long flags; | |
1da177e4 | 1316 | |
1c45607a JS |
1317 | spin_lock_irqsave(&info->slock, flags); |
1318 | status = inb(info->ioaddr + UART_LSR); | |
1319 | spin_unlock_irqrestore(&info->slock, flags); | |
1320 | result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0); | |
1321 | return put_user(result, value); | |
1322 | } | |
1da177e4 | 1323 | |
60b33c13 | 1324 | static int mxser_tiocmget(struct tty_struct *tty) |
1c45607a JS |
1325 | { |
1326 | struct mxser_port *info = tty->driver_data; | |
1327 | unsigned char control, status; | |
1328 | unsigned long flags; | |
1da177e4 | 1329 | |
8ea2c2ec | 1330 | |
1c45607a JS |
1331 | if (tty->index == MXSER_PORTS) |
1332 | return -ENOIOCTLCMD; | |
1333 | if (test_bit(TTY_IO_ERROR, &tty->flags)) | |
1334 | return -EIO; | |
1da177e4 | 1335 | |
1c45607a | 1336 | control = info->MCR; |
1da177e4 | 1337 | |
1c45607a JS |
1338 | spin_lock_irqsave(&info->slock, flags); |
1339 | status = inb(info->ioaddr + UART_MSR); | |
1340 | if (status & UART_MSR_ANY_DELTA) | |
216ba023 | 1341 | mxser_check_modem_status(tty, info, status); |
1c45607a JS |
1342 | spin_unlock_irqrestore(&info->slock, flags); |
1343 | return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) | | |
1344 | ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) | | |
1345 | ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) | | |
1346 | ((status & UART_MSR_RI) ? TIOCM_RNG : 0) | | |
1347 | ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) | | |
1348 | ((status & UART_MSR_CTS) ? TIOCM_CTS : 0); | |
1349 | } | |
1da177e4 | 1350 | |
20b9d177 | 1351 | static int mxser_tiocmset(struct tty_struct *tty, |
1c45607a JS |
1352 | unsigned int set, unsigned int clear) |
1353 | { | |
1354 | struct mxser_port *info = tty->driver_data; | |
1355 | unsigned long flags; | |
1da177e4 | 1356 | |
1da177e4 | 1357 | |
1c45607a JS |
1358 | if (tty->index == MXSER_PORTS) |
1359 | return -ENOIOCTLCMD; | |
1360 | if (test_bit(TTY_IO_ERROR, &tty->flags)) | |
1361 | return -EIO; | |
1da177e4 | 1362 | |
1c45607a | 1363 | spin_lock_irqsave(&info->slock, flags); |
1da177e4 | 1364 | |
1c45607a JS |
1365 | if (set & TIOCM_RTS) |
1366 | info->MCR |= UART_MCR_RTS; | |
1367 | if (set & TIOCM_DTR) | |
1368 | info->MCR |= UART_MCR_DTR; | |
1da177e4 | 1369 | |
1c45607a JS |
1370 | if (clear & TIOCM_RTS) |
1371 | info->MCR &= ~UART_MCR_RTS; | |
1372 | if (clear & TIOCM_DTR) | |
1373 | info->MCR &= ~UART_MCR_DTR; | |
8ea2c2ec | 1374 | |
1c45607a JS |
1375 | outb(info->MCR, info->ioaddr + UART_MCR); |
1376 | spin_unlock_irqrestore(&info->slock, flags); | |
1377 | return 0; | |
1378 | } | |
1da177e4 | 1379 | |
1c45607a JS |
1380 | static int __init mxser_program_mode(int port) |
1381 | { | |
1382 | int id, i, j, n; | |
1383 | ||
1384 | outb(0, port); | |
1385 | outb(0, port); | |
1386 | outb(0, port); | |
1387 | (void)inb(port); | |
1388 | (void)inb(port); | |
1389 | outb(0, port); | |
1390 | (void)inb(port); | |
1391 | ||
1392 | id = inb(port + 1) & 0x1F; | |
1393 | if ((id != C168_ASIC_ID) && | |
1394 | (id != C104_ASIC_ID) && | |
1395 | (id != C102_ASIC_ID) && | |
1396 | (id != CI132_ASIC_ID) && | |
1397 | (id != CI134_ASIC_ID) && | |
1398 | (id != CI104J_ASIC_ID)) | |
1399 | return -1; | |
1400 | for (i = 0, j = 0; i < 4; i++) { | |
1401 | n = inb(port + 2); | |
1402 | if (n == 'M') { | |
1403 | j = 1; | |
1404 | } else if ((j == 1) && (n == 1)) { | |
1405 | j = 2; | |
1406 | break; | |
1407 | } else | |
1408 | j = 0; | |
1da177e4 | 1409 | } |
1c45607a JS |
1410 | if (j != 2) |
1411 | id = -2; | |
1412 | return id; | |
1da177e4 LT |
1413 | } |
1414 | ||
1c45607a JS |
1415 | static void __init mxser_normal_mode(int port) |
1416 | { | |
1417 | int i, n; | |
1418 | ||
1419 | outb(0xA5, port + 1); | |
1420 | outb(0x80, port + 3); | |
1421 | outb(12, port + 0); /* 9600 bps */ | |
1422 | outb(0, port + 1); | |
1423 | outb(0x03, port + 3); /* 8 data bits */ | |
1424 | outb(0x13, port + 4); /* loop back mode */ | |
1425 | for (i = 0; i < 16; i++) { | |
1426 | n = inb(port + 5); | |
1427 | if ((n & 0x61) == 0x60) | |
1428 | break; | |
1429 | if ((n & 1) == 1) | |
1430 | (void)inb(port); | |
1431 | } | |
1432 | outb(0x00, port + 4); | |
1433 | } | |
1434 | ||
1435 | #define CHIP_SK 0x01 /* Serial Data Clock in Eprom */ | |
1436 | #define CHIP_DO 0x02 /* Serial Data Output in Eprom */ | |
1437 | #define CHIP_CS 0x04 /* Serial Chip Select in Eprom */ | |
1438 | #define CHIP_DI 0x08 /* Serial Data Input in Eprom */ | |
1439 | #define EN_CCMD 0x000 /* Chip's command register */ | |
1440 | #define EN0_RSARLO 0x008 /* Remote start address reg 0 */ | |
1441 | #define EN0_RSARHI 0x009 /* Remote start address reg 1 */ | |
1442 | #define EN0_RCNTLO 0x00A /* Remote byte count reg WR */ | |
1443 | #define EN0_RCNTHI 0x00B /* Remote byte count reg WR */ | |
1444 | #define EN0_DCFG 0x00E /* Data configuration reg WR */ | |
1445 | #define EN0_PORT 0x010 /* Rcv missed frame error counter RD */ | |
1446 | #define ENC_PAGE0 0x000 /* Select page 0 of chip registers */ | |
1447 | #define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */ | |
1448 | static int __init mxser_read_register(int port, unsigned short *regs) | |
1449 | { | |
1450 | int i, k, value, id; | |
1451 | unsigned int j; | |
1452 | ||
1453 | id = mxser_program_mode(port); | |
1454 | if (id < 0) | |
1455 | return id; | |
1456 | for (i = 0; i < 14; i++) { | |
1457 | k = (i & 0x3F) | 0x180; | |
1458 | for (j = 0x100; j > 0; j >>= 1) { | |
1459 | outb(CHIP_CS, port); | |
1460 | if (k & j) { | |
1461 | outb(CHIP_CS | CHIP_DO, port); | |
1462 | outb(CHIP_CS | CHIP_DO | CHIP_SK, port); /* A? bit of read */ | |
1463 | } else { | |
1464 | outb(CHIP_CS, port); | |
1465 | outb(CHIP_CS | CHIP_SK, port); /* A? bit of read */ | |
1466 | } | |
1467 | } | |
1468 | (void)inb(port); | |
1469 | value = 0; | |
1470 | for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) { | |
1471 | outb(CHIP_CS, port); | |
1472 | outb(CHIP_CS | CHIP_SK, port); | |
1473 | if (inb(port) & CHIP_DI) | |
1474 | value |= j; | |
1475 | } | |
1476 | regs[i] = value; | |
1477 | outb(0, port); | |
1478 | } | |
1479 | mxser_normal_mode(port); | |
1480 | return id; | |
1481 | } | |
1da177e4 LT |
1482 | |
1483 | static int mxser_ioctl_special(unsigned int cmd, void __user *argp) | |
1484 | { | |
07f86c03 AC |
1485 | struct mxser_port *ip; |
1486 | struct tty_port *port; | |
216ba023 | 1487 | struct tty_struct *tty; |
1c45607a JS |
1488 | int result, status; |
1489 | unsigned int i, j; | |
9d6d162d | 1490 | int ret = 0; |
1da177e4 LT |
1491 | |
1492 | switch (cmd) { | |
1da177e4 | 1493 | case MOXA_GET_MAJOR: |
5a3c6b25 | 1494 | printk_ratelimited(KERN_WARNING "mxser: '%s' uses deprecated ioctl " |
8f3d137e JS |
1495 | "%x (GET_MAJOR), fix your userspace\n", |
1496 | current->comm, cmd); | |
1c45607a | 1497 | return put_user(ttymajor, (int __user *)argp); |
1da177e4 LT |
1498 | |
1499 | case MOXA_CHKPORTENABLE: | |
1500 | result = 0; | |
1c45607a JS |
1501 | for (i = 0; i < MXSER_BOARDS; i++) |
1502 | for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) | |
1503 | if (mxser_boards[i].ports[j].ioaddr) | |
1504 | result |= (1 << i); | |
8ea2c2ec | 1505 | return put_user(result, (unsigned long __user *)argp); |
1da177e4 | 1506 | case MOXA_GETDATACOUNT: |
07f86c03 AC |
1507 | /* The receive side is locked by port->slock but it isn't |
1508 | clear that an exact snapshot is worth copying here */ | |
1da177e4 | 1509 | if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log))) |
9d6d162d | 1510 | ret = -EFAULT; |
9d6d162d | 1511 | return ret; |
72800df9 JS |
1512 | case MOXA_GETMSTATUS: { |
1513 | struct mxser_mstatus ms, __user *msu = argp; | |
1c45607a JS |
1514 | for (i = 0; i < MXSER_BOARDS; i++) |
1515 | for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) { | |
07f86c03 AC |
1516 | ip = &mxser_boards[i].ports[j]; |
1517 | port = &ip->port; | |
72800df9 | 1518 | memset(&ms, 0, sizeof(ms)); |
1c45607a | 1519 | |
07f86c03 AC |
1520 | mutex_lock(&port->mutex); |
1521 | if (!ip->ioaddr) | |
72800df9 | 1522 | goto copy; |
216ba023 | 1523 | |
07f86c03 | 1524 | tty = tty_port_tty_get(port); |
1da177e4 | 1525 | |
216ba023 | 1526 | if (!tty || !tty->termios) |
07f86c03 | 1527 | ms.cflag = ip->normal_termios.c_cflag; |
1c45607a | 1528 | else |
216ba023 AC |
1529 | ms.cflag = tty->termios->c_cflag; |
1530 | tty_kref_put(tty); | |
07f86c03 AC |
1531 | spin_lock_irq(&ip->slock); |
1532 | status = inb(ip->ioaddr + UART_MSR); | |
1533 | spin_unlock_irq(&ip->slock); | |
72800df9 JS |
1534 | if (status & UART_MSR_DCD) |
1535 | ms.dcd = 1; | |
1536 | if (status & UART_MSR_DSR) | |
1537 | ms.dsr = 1; | |
1538 | if (status & UART_MSR_CTS) | |
1539 | ms.cts = 1; | |
1540 | copy: | |
07f86c03 AC |
1541 | mutex_unlock(&port->mutex); |
1542 | if (copy_to_user(msu, &ms, sizeof(ms))) | |
72800df9 | 1543 | return -EFAULT; |
72800df9 | 1544 | msu++; |
1c45607a | 1545 | } |
1da177e4 | 1546 | return 0; |
72800df9 | 1547 | } |
8ea2c2ec | 1548 | case MOXA_ASPP_MON_EXT: { |
72800df9 JS |
1549 | struct mxser_mon_ext *me; /* it's 2k, stack unfriendly */ |
1550 | unsigned int cflag, iflag, p; | |
1551 | u8 opmode; | |
1552 | ||
1553 | me = kzalloc(sizeof(*me), GFP_KERNEL); | |
1554 | if (!me) | |
1555 | return -ENOMEM; | |
1c45607a | 1556 | |
72800df9 JS |
1557 | for (i = 0, p = 0; i < MXSER_BOARDS; i++) { |
1558 | for (j = 0; j < MXSER_PORTS_PER_BOARD; j++, p++) { | |
1559 | if (p >= ARRAY_SIZE(me->rx_cnt)) { | |
1560 | i = MXSER_BOARDS; | |
1561 | break; | |
1562 | } | |
07f86c03 AC |
1563 | ip = &mxser_boards[i].ports[j]; |
1564 | port = &ip->port; | |
1565 | ||
1566 | mutex_lock(&port->mutex); | |
1567 | if (!ip->ioaddr) { | |
1568 | mutex_unlock(&port->mutex); | |
1da177e4 | 1569 | continue; |
07f86c03 | 1570 | } |
1da177e4 | 1571 | |
07f86c03 AC |
1572 | spin_lock_irq(&ip->slock); |
1573 | status = mxser_get_msr(ip->ioaddr, 0, p); | |
1c45607a | 1574 | |
1da177e4 | 1575 | if (status & UART_MSR_TERI) |
07f86c03 | 1576 | ip->icount.rng++; |
1da177e4 | 1577 | if (status & UART_MSR_DDSR) |
07f86c03 | 1578 | ip->icount.dsr++; |
1da177e4 | 1579 | if (status & UART_MSR_DDCD) |
07f86c03 | 1580 | ip->icount.dcd++; |
1da177e4 | 1581 | if (status & UART_MSR_DCTS) |
07f86c03 | 1582 | ip->icount.cts++; |
1c45607a | 1583 | |
07f86c03 AC |
1584 | ip->mon_data.modem_status = status; |
1585 | me->rx_cnt[p] = ip->mon_data.rxcnt; | |
1586 | me->tx_cnt[p] = ip->mon_data.txcnt; | |
1587 | me->up_rxcnt[p] = ip->mon_data.up_rxcnt; | |
1588 | me->up_txcnt[p] = ip->mon_data.up_txcnt; | |
72800df9 | 1589 | me->modem_status[p] = |
07f86c03 AC |
1590 | ip->mon_data.modem_status; |
1591 | spin_unlock_irq(&ip->slock); | |
1592 | ||
1593 | tty = tty_port_tty_get(&ip->port); | |
1c45607a | 1594 | |
216ba023 | 1595 | if (!tty || !tty->termios) { |
07f86c03 AC |
1596 | cflag = ip->normal_termios.c_cflag; |
1597 | iflag = ip->normal_termios.c_iflag; | |
1598 | me->baudrate[p] = tty_termios_baud_rate(&ip->normal_termios); | |
1da177e4 | 1599 | } else { |
216ba023 AC |
1600 | cflag = tty->termios->c_cflag; |
1601 | iflag = tty->termios->c_iflag; | |
1602 | me->baudrate[p] = tty_get_baud_rate(tty); | |
1da177e4 | 1603 | } |
216ba023 | 1604 | tty_kref_put(tty); |
1da177e4 | 1605 | |
72800df9 JS |
1606 | me->databits[p] = cflag & CSIZE; |
1607 | me->stopbits[p] = cflag & CSTOPB; | |
1608 | me->parity[p] = cflag & (PARENB | PARODD | | |
1609 | CMSPAR); | |
1da177e4 LT |
1610 | |
1611 | if (cflag & CRTSCTS) | |
72800df9 | 1612 | me->flowctrl[p] |= 0x03; |
1da177e4 LT |
1613 | |
1614 | if (iflag & (IXON | IXOFF)) | |
72800df9 | 1615 | me->flowctrl[p] |= 0x0C; |
1da177e4 | 1616 | |
07f86c03 | 1617 | if (ip->type == PORT_16550A) |
72800df9 | 1618 | me->fifo[p] = 1; |
1da177e4 | 1619 | |
07f86c03 | 1620 | opmode = inb(ip->opmode_ioaddr)>>((p % 4) * 2); |
1da177e4 | 1621 | opmode &= OP_MODE_MASK; |
72800df9 | 1622 | me->iftype[p] = opmode; |
07f86c03 | 1623 | mutex_unlock(&port->mutex); |
1da177e4 | 1624 | } |
9d6d162d | 1625 | } |
72800df9 JS |
1626 | if (copy_to_user(argp, me, sizeof(*me))) |
1627 | ret = -EFAULT; | |
1628 | kfree(me); | |
1629 | return ret; | |
9d6d162d AC |
1630 | } |
1631 | default: | |
1da177e4 LT |
1632 | return -ENOIOCTLCMD; |
1633 | } | |
1634 | return 0; | |
1635 | } | |
1636 | ||
1c45607a JS |
1637 | static int mxser_cflags_changed(struct mxser_port *info, unsigned long arg, |
1638 | struct async_icount *cprev) | |
1da177e4 | 1639 | { |
1c45607a JS |
1640 | struct async_icount cnow; |
1641 | unsigned long flags; | |
1642 | int ret; | |
1da177e4 | 1643 | |
1c45607a JS |
1644 | spin_lock_irqsave(&info->slock, flags); |
1645 | cnow = info->icount; /* atomic copy */ | |
1646 | spin_unlock_irqrestore(&info->slock, flags); | |
1da177e4 | 1647 | |
1c45607a JS |
1648 | ret = ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) || |
1649 | ((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) || | |
1650 | ((arg & TIOCM_CD) && (cnow.dcd != cprev->dcd)) || | |
1651 | ((arg & TIOCM_CTS) && (cnow.cts != cprev->cts)); | |
1da177e4 | 1652 | |
1c45607a JS |
1653 | *cprev = cnow; |
1654 | ||
1655 | return ret; | |
1656 | } | |
1657 | ||
6caa76b7 | 1658 | static int mxser_ioctl(struct tty_struct *tty, |
1c45607a | 1659 | unsigned int cmd, unsigned long arg) |
1da177e4 | 1660 | { |
1c45607a | 1661 | struct mxser_port *info = tty->driver_data; |
07f86c03 | 1662 | struct tty_port *port = &info->port; |
1c45607a | 1663 | struct async_icount cnow; |
1c45607a JS |
1664 | unsigned long flags; |
1665 | void __user *argp = (void __user *)arg; | |
1666 | int retval; | |
1da177e4 | 1667 | |
1c45607a JS |
1668 | if (tty->index == MXSER_PORTS) |
1669 | return mxser_ioctl_special(cmd, argp); | |
1da177e4 | 1670 | |
1c45607a JS |
1671 | if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) { |
1672 | int p; | |
1673 | unsigned long opmode; | |
1674 | static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f }; | |
1675 | int shiftbit; | |
1676 | unsigned char val, mask; | |
1da177e4 | 1677 | |
1c45607a JS |
1678 | p = tty->index % 4; |
1679 | if (cmd == MOXA_SET_OP_MODE) { | |
1680 | if (get_user(opmode, (int __user *) argp)) | |
1681 | return -EFAULT; | |
1682 | if (opmode != RS232_MODE && | |
1683 | opmode != RS485_2WIRE_MODE && | |
1684 | opmode != RS422_MODE && | |
1685 | opmode != RS485_4WIRE_MODE) | |
1686 | return -EFAULT; | |
1687 | mask = ModeMask[p]; | |
1688 | shiftbit = p * 2; | |
07f86c03 | 1689 | spin_lock_irq(&info->slock); |
1c45607a JS |
1690 | val = inb(info->opmode_ioaddr); |
1691 | val &= mask; | |
1692 | val |= (opmode << shiftbit); | |
1693 | outb(val, info->opmode_ioaddr); | |
07f86c03 | 1694 | spin_unlock_irq(&info->slock); |
1c45607a JS |
1695 | } else { |
1696 | shiftbit = p * 2; | |
07f86c03 | 1697 | spin_lock_irq(&info->slock); |
1c45607a | 1698 | opmode = inb(info->opmode_ioaddr) >> shiftbit; |
07f86c03 | 1699 | spin_unlock_irq(&info->slock); |
1c45607a JS |
1700 | opmode &= OP_MODE_MASK; |
1701 | if (put_user(opmode, (int __user *)argp)) | |
1702 | return -EFAULT; | |
1703 | } | |
1704 | return 0; | |
1705 | } | |
1706 | ||
0587102c | 1707 | if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT && |
1c45607a JS |
1708 | test_bit(TTY_IO_ERROR, &tty->flags)) |
1709 | return -EIO; | |
1710 | ||
1711 | switch (cmd) { | |
1c45607a | 1712 | case TIOCGSERIAL: |
07f86c03 | 1713 | mutex_lock(&port->mutex); |
216ba023 | 1714 | retval = mxser_get_serial_info(tty, argp); |
07f86c03 | 1715 | mutex_unlock(&port->mutex); |
9d6d162d | 1716 | return retval; |
1c45607a | 1717 | case TIOCSSERIAL: |
07f86c03 | 1718 | mutex_lock(&port->mutex); |
216ba023 | 1719 | retval = mxser_set_serial_info(tty, argp); |
07f86c03 | 1720 | mutex_unlock(&port->mutex); |
9d6d162d | 1721 | return retval; |
1c45607a | 1722 | case TIOCSERGETLSR: /* Get line status register */ |
9d6d162d | 1723 | return mxser_get_lsr_info(info, argp); |
1c45607a JS |
1724 | /* |
1725 | * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change | |
1726 | * - mask passed in arg for lines of interest | |
1727 | * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) | |
1728 | * Caller should use TIOCGICOUNT to see which one it was | |
1729 | */ | |
1730 | case TIOCMIWAIT: | |
1731 | spin_lock_irqsave(&info->slock, flags); | |
1732 | cnow = info->icount; /* note the counters on entry */ | |
1733 | spin_unlock_irqrestore(&info->slock, flags); | |
1734 | ||
bdc04e31 | 1735 | return wait_event_interruptible(info->port.delta_msr_wait, |
1c45607a | 1736 | mxser_cflags_changed(info, arg, &cnow)); |
1c45607a JS |
1737 | case MOXA_HighSpeedOn: |
1738 | return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp); | |
1739 | case MOXA_SDS_RSTICOUNTER: | |
07f86c03 | 1740 | spin_lock_irq(&info->slock); |
1c45607a JS |
1741 | info->mon_data.rxcnt = 0; |
1742 | info->mon_data.txcnt = 0; | |
07f86c03 | 1743 | spin_unlock_irq(&info->slock); |
1c45607a JS |
1744 | return 0; |
1745 | ||
1746 | case MOXA_ASPP_OQUEUE:{ | |
1747 | int len, lsr; | |
1748 | ||
1749 | len = mxser_chars_in_buffer(tty); | |
c6eb69ac | 1750 | spin_lock_irq(&info->slock); |
a75b7b68 | 1751 | lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_THRE; |
07f86c03 | 1752 | spin_unlock_irq(&info->slock); |
1c45607a JS |
1753 | len += (lsr ? 0 : 1); |
1754 | ||
1755 | return put_user(len, (int __user *)argp); | |
1756 | } | |
1757 | case MOXA_ASPP_MON: { | |
1758 | int mcr, status; | |
1759 | ||
c6eb69ac | 1760 | spin_lock_irq(&info->slock); |
1c45607a | 1761 | status = mxser_get_msr(info->ioaddr, 1, tty->index); |
216ba023 | 1762 | mxser_check_modem_status(tty, info, status); |
1c45607a JS |
1763 | |
1764 | mcr = inb(info->ioaddr + UART_MCR); | |
c6eb69ac | 1765 | spin_unlock_irq(&info->slock); |
07f86c03 | 1766 | |
1c45607a JS |
1767 | if (mcr & MOXA_MUST_MCR_XON_FLAG) |
1768 | info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD; | |
1769 | else | |
1770 | info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD; | |
1771 | ||
1772 | if (mcr & MOXA_MUST_MCR_TX_XON) | |
1773 | info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT; | |
1774 | else | |
1775 | info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT; | |
1776 | ||
216ba023 | 1777 | if (tty->hw_stopped) |
1c45607a JS |
1778 | info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD; |
1779 | else | |
1780 | info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD; | |
07f86c03 | 1781 | |
1c45607a JS |
1782 | if (copy_to_user(argp, &info->mon_data, |
1783 | sizeof(struct mxser_mon))) | |
1784 | return -EFAULT; | |
1785 | ||
1786 | return 0; | |
1787 | } | |
1788 | case MOXA_ASPP_LSTATUS: { | |
1789 | if (put_user(info->err_shadow, (unsigned char __user *)argp)) | |
1790 | return -EFAULT; | |
1791 | ||
1792 | info->err_shadow = 0; | |
1793 | return 0; | |
1794 | } | |
1795 | case MOXA_SET_BAUD_METHOD: { | |
1796 | int method; | |
1797 | ||
1798 | if (get_user(method, (int __user *)argp)) | |
1799 | return -EFAULT; | |
1800 | mxser_set_baud_method[tty->index] = method; | |
1801 | return put_user(method, (int __user *)argp); | |
1802 | } | |
1803 | default: | |
1804 | return -ENOIOCTLCMD; | |
1805 | } | |
1806 | return 0; | |
1807 | } | |
1808 | ||
0587102c AC |
1809 | /* |
1810 | * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) | |
1811 | * Return: write counters to the user passed counter struct | |
1812 | * NB: both 1->0 and 0->1 transitions are counted except for | |
1813 | * RI where only 0->1 is counted. | |
1814 | */ | |
1815 | ||
1816 | static int mxser_get_icount(struct tty_struct *tty, | |
1817 | struct serial_icounter_struct *icount) | |
1818 | ||
1819 | { | |
1820 | struct mxser_port *info = tty->driver_data; | |
1821 | struct async_icount cnow; | |
1822 | unsigned long flags; | |
1823 | ||
1824 | spin_lock_irqsave(&info->slock, flags); | |
1825 | cnow = info->icount; | |
1826 | spin_unlock_irqrestore(&info->slock, flags); | |
1827 | ||
1828 | icount->frame = cnow.frame; | |
1829 | icount->brk = cnow.brk; | |
1830 | icount->overrun = cnow.overrun; | |
1831 | icount->buf_overrun = cnow.buf_overrun; | |
1832 | icount->parity = cnow.parity; | |
1833 | icount->rx = cnow.rx; | |
1834 | icount->tx = cnow.tx; | |
1835 | icount->cts = cnow.cts; | |
1836 | icount->dsr = cnow.dsr; | |
1837 | icount->rng = cnow.rng; | |
1838 | icount->dcd = cnow.dcd; | |
1839 | return 0; | |
1840 | } | |
1841 | ||
1c45607a JS |
1842 | static void mxser_stoprx(struct tty_struct *tty) |
1843 | { | |
1844 | struct mxser_port *info = tty->driver_data; | |
1845 | ||
1846 | info->ldisc_stop_rx = 1; | |
1847 | if (I_IXOFF(tty)) { | |
1848 | if (info->board->chip_flag) { | |
1849 | info->IER &= ~MOXA_MUST_RECV_ISR; | |
1850 | outb(info->IER, info->ioaddr + UART_IER); | |
1851 | } else { | |
1852 | info->x_char = STOP_CHAR(tty); | |
1853 | outb(0, info->ioaddr + UART_IER); | |
1854 | info->IER |= UART_IER_THRI; | |
1855 | outb(info->IER, info->ioaddr + UART_IER); | |
1da177e4 LT |
1856 | } |
1857 | } | |
1858 | ||
216ba023 | 1859 | if (tty->termios->c_cflag & CRTSCTS) { |
1c45607a JS |
1860 | info->MCR &= ~UART_MCR_RTS; |
1861 | outb(info->MCR, info->ioaddr + UART_MCR); | |
1da177e4 LT |
1862 | } |
1863 | } | |
1864 | ||
1865 | /* | |
1866 | * This routine is called by the upper-layer tty layer to signal that | |
1867 | * incoming characters should be throttled. | |
1868 | */ | |
1869 | static void mxser_throttle(struct tty_struct *tty) | |
1870 | { | |
1da177e4 | 1871 | mxser_stoprx(tty); |
1da177e4 LT |
1872 | } |
1873 | ||
1874 | static void mxser_unthrottle(struct tty_struct *tty) | |
1875 | { | |
1c45607a | 1876 | struct mxser_port *info = tty->driver_data; |
1da177e4 | 1877 | |
1c45607a JS |
1878 | /* startrx */ |
1879 | info->ldisc_stop_rx = 0; | |
1880 | if (I_IXOFF(tty)) { | |
1881 | if (info->x_char) | |
1882 | info->x_char = 0; | |
1883 | else { | |
1884 | if (info->board->chip_flag) { | |
1885 | info->IER |= MOXA_MUST_RECV_ISR; | |
1886 | outb(info->IER, info->ioaddr + UART_IER); | |
1887 | } else { | |
1888 | info->x_char = START_CHAR(tty); | |
1889 | outb(0, info->ioaddr + UART_IER); | |
1890 | info->IER |= UART_IER_THRI; | |
1891 | outb(info->IER, info->ioaddr + UART_IER); | |
1892 | } | |
1da177e4 | 1893 | } |
1c45607a | 1894 | } |
1da177e4 | 1895 | |
216ba023 | 1896 | if (tty->termios->c_cflag & CRTSCTS) { |
1c45607a JS |
1897 | info->MCR |= UART_MCR_RTS; |
1898 | outb(info->MCR, info->ioaddr + UART_MCR); | |
1da177e4 LT |
1899 | } |
1900 | } | |
1901 | ||
1902 | /* | |
1903 | * mxser_stop() and mxser_start() | |
1904 | * | |
1905 | * This routines are called before setting or resetting tty->stopped. | |
1906 | * They enable or disable transmitter interrupts, as necessary. | |
1907 | */ | |
1908 | static void mxser_stop(struct tty_struct *tty) | |
1909 | { | |
1c45607a | 1910 | struct mxser_port *info = tty->driver_data; |
1da177e4 LT |
1911 | unsigned long flags; |
1912 | ||
1913 | spin_lock_irqsave(&info->slock, flags); | |
1914 | if (info->IER & UART_IER_THRI) { | |
1915 | info->IER &= ~UART_IER_THRI; | |
1c45607a | 1916 | outb(info->IER, info->ioaddr + UART_IER); |
1da177e4 LT |
1917 | } |
1918 | spin_unlock_irqrestore(&info->slock, flags); | |
1919 | } | |
1920 | ||
1921 | static void mxser_start(struct tty_struct *tty) | |
1922 | { | |
1c45607a | 1923 | struct mxser_port *info = tty->driver_data; |
1da177e4 LT |
1924 | unsigned long flags; |
1925 | ||
1926 | spin_lock_irqsave(&info->slock, flags); | |
0ad9e7d1 | 1927 | if (info->xmit_cnt && info->port.xmit_buf) { |
1c45607a | 1928 | outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER); |
1da177e4 | 1929 | info->IER |= UART_IER_THRI; |
1c45607a | 1930 | outb(info->IER, info->ioaddr + UART_IER); |
1da177e4 LT |
1931 | } |
1932 | spin_unlock_irqrestore(&info->slock, flags); | |
1933 | } | |
1934 | ||
1c45607a JS |
1935 | static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios) |
1936 | { | |
1937 | struct mxser_port *info = tty->driver_data; | |
1938 | unsigned long flags; | |
1939 | ||
1940 | spin_lock_irqsave(&info->slock, flags); | |
216ba023 | 1941 | mxser_change_speed(tty, old_termios); |
1c45607a JS |
1942 | spin_unlock_irqrestore(&info->slock, flags); |
1943 | ||
1944 | if ((old_termios->c_cflag & CRTSCTS) && | |
1945 | !(tty->termios->c_cflag & CRTSCTS)) { | |
1946 | tty->hw_stopped = 0; | |
1947 | mxser_start(tty); | |
1948 | } | |
1949 | ||
1950 | /* Handle sw stopped */ | |
1951 | if ((old_termios->c_iflag & IXON) && | |
1952 | !(tty->termios->c_iflag & IXON)) { | |
1953 | tty->stopped = 0; | |
1954 | ||
1955 | if (info->board->chip_flag) { | |
1956 | spin_lock_irqsave(&info->slock, flags); | |
148ff86b CH |
1957 | mxser_disable_must_rx_software_flow_control( |
1958 | info->ioaddr); | |
1c45607a JS |
1959 | spin_unlock_irqrestore(&info->slock, flags); |
1960 | } | |
1961 | ||
1962 | mxser_start(tty); | |
1963 | } | |
1964 | } | |
1965 | ||
1da177e4 LT |
1966 | /* |
1967 | * mxser_wait_until_sent() --- wait until the transmitter is empty | |
1968 | */ | |
1969 | static void mxser_wait_until_sent(struct tty_struct *tty, int timeout) | |
1970 | { | |
1c45607a | 1971 | struct mxser_port *info = tty->driver_data; |
1da177e4 | 1972 | unsigned long orig_jiffies, char_time; |
07f86c03 | 1973 | unsigned long flags; |
1da177e4 LT |
1974 | int lsr; |
1975 | ||
1976 | if (info->type == PORT_UNKNOWN) | |
1977 | return; | |
1978 | ||
1979 | if (info->xmit_fifo_size == 0) | |
1980 | return; /* Just in case.... */ | |
1981 | ||
1982 | orig_jiffies = jiffies; | |
1983 | /* | |
1984 | * Set the check interval to be 1/5 of the estimated time to | |
1985 | * send a single character, and make it at least 1. The check | |
1986 | * interval should also be less than the timeout. | |
1987 | * | |
1988 | * Note: we have to use pretty tight timings here to satisfy | |
1989 | * the NIST-PCTS. | |
1990 | */ | |
1991 | char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size; | |
1992 | char_time = char_time / 5; | |
1993 | if (char_time == 0) | |
1994 | char_time = 1; | |
1995 | if (timeout && timeout < char_time) | |
1996 | char_time = timeout; | |
1997 | /* | |
1998 | * If the transmitter hasn't cleared in twice the approximate | |
1999 | * amount of time to send the entire FIFO, it probably won't | |
2000 | * ever clear. This assumes the UART isn't doing flow | |
2001 | * control, which is currently the case. Hence, if it ever | |
2002 | * takes longer than info->timeout, this is probably due to a | |
2003 | * UART bug of some kind. So, we clamp the timeout parameter at | |
2004 | * 2*info->timeout. | |
2005 | */ | |
2006 | if (!timeout || timeout > 2 * info->timeout) | |
2007 | timeout = 2 * info->timeout; | |
8bab534b | 2008 | |
07f86c03 | 2009 | spin_lock_irqsave(&info->slock, flags); |
1c45607a | 2010 | while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) { |
07f86c03 | 2011 | spin_unlock_irqrestore(&info->slock, flags); |
da4cd8df | 2012 | schedule_timeout_interruptible(char_time); |
07f86c03 | 2013 | spin_lock_irqsave(&info->slock, flags); |
1da177e4 | 2014 | if (signal_pending(current)) |
1c45607a JS |
2015 | break; |
2016 | if (timeout && time_after(jiffies, orig_jiffies + timeout)) | |
2017 | break; | |
1da177e4 | 2018 | } |
07f86c03 | 2019 | spin_unlock_irqrestore(&info->slock, flags); |
1c45607a | 2020 | set_current_state(TASK_RUNNING); |
1c45607a | 2021 | } |
1da177e4 | 2022 | |
1c45607a JS |
2023 | /* |
2024 | * This routine is called by tty_hangup() when a hangup is signaled. | |
2025 | */ | |
2026 | static void mxser_hangup(struct tty_struct *tty) | |
2027 | { | |
2028 | struct mxser_port *info = tty->driver_data; | |
1da177e4 | 2029 | |
1c45607a | 2030 | mxser_flush_buffer(tty); |
3b6826b2 | 2031 | tty_port_hangup(&info->port); |
1da177e4 LT |
2032 | } |
2033 | ||
1c45607a JS |
2034 | /* |
2035 | * mxser_rs_break() --- routine which turns the break handling on or off | |
2036 | */ | |
9e98966c | 2037 | static int mxser_rs_break(struct tty_struct *tty, int break_state) |
1da177e4 | 2038 | { |
1c45607a | 2039 | struct mxser_port *info = tty->driver_data; |
1da177e4 LT |
2040 | unsigned long flags; |
2041 | ||
1c45607a JS |
2042 | spin_lock_irqsave(&info->slock, flags); |
2043 | if (break_state == -1) | |
2044 | outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC, | |
2045 | info->ioaddr + UART_LCR); | |
2046 | else | |
2047 | outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC, | |
2048 | info->ioaddr + UART_LCR); | |
2049 | spin_unlock_irqrestore(&info->slock, flags); | |
9e98966c | 2050 | return 0; |
1c45607a | 2051 | } |
1da177e4 | 2052 | |
216ba023 AC |
2053 | static void mxser_receive_chars(struct tty_struct *tty, |
2054 | struct mxser_port *port, int *status) | |
1c45607a | 2055 | { |
1c45607a JS |
2056 | unsigned char ch, gdl; |
2057 | int ignored = 0; | |
2058 | int cnt = 0; | |
2059 | int recv_room; | |
2060 | int max = 256; | |
1da177e4 | 2061 | |
1c45607a | 2062 | recv_room = tty->receive_room; |
216ba023 | 2063 | if (recv_room == 0 && !port->ldisc_stop_rx) |
1c45607a | 2064 | mxser_stoprx(tty); |
1c45607a | 2065 | if (port->board->chip_flag != MOXA_OTHER_UART) { |
1da177e4 | 2066 | |
1c45607a JS |
2067 | if (*status & UART_LSR_SPECIAL) |
2068 | goto intr_old; | |
2069 | if (port->board->chip_flag == MOXA_MUST_MU860_HWID && | |
2070 | (*status & MOXA_MUST_LSR_RERR)) | |
2071 | goto intr_old; | |
2072 | if (*status & MOXA_MUST_LSR_RERR) | |
2073 | goto intr_old; | |
1da177e4 | 2074 | |
1c45607a JS |
2075 | gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER); |
2076 | ||
2077 | if (port->board->chip_flag == MOXA_MUST_MU150_HWID) | |
2078 | gdl &= MOXA_MUST_GDL_MASK; | |
2079 | if (gdl >= recv_room) { | |
2080 | if (!port->ldisc_stop_rx) | |
2081 | mxser_stoprx(tty); | |
2082 | } | |
2083 | while (gdl--) { | |
2084 | ch = inb(port->ioaddr + UART_RX); | |
2085 | tty_insert_flip_char(tty, ch, 0); | |
2086 | cnt++; | |
2087 | } | |
2088 | goto end_intr; | |
1da177e4 | 2089 | } |
1c45607a JS |
2090 | intr_old: |
2091 | ||
2092 | do { | |
2093 | if (max-- < 0) | |
2094 | break; | |
1da177e4 | 2095 | |
1c45607a JS |
2096 | ch = inb(port->ioaddr + UART_RX); |
2097 | if (port->board->chip_flag && (*status & UART_LSR_OE)) | |
2098 | outb(0x23, port->ioaddr + UART_FCR); | |
2099 | *status &= port->read_status_mask; | |
2100 | if (*status & port->ignore_status_mask) { | |
2101 | if (++ignored > 100) | |
2102 | break; | |
2103 | } else { | |
2104 | char flag = 0; | |
2105 | if (*status & UART_LSR_SPECIAL) { | |
2106 | if (*status & UART_LSR_BI) { | |
2107 | flag = TTY_BREAK; | |
2108 | port->icount.brk++; | |
1da177e4 | 2109 | |
0ad9e7d1 | 2110 | if (port->port.flags & ASYNC_SAK) |
1c45607a JS |
2111 | do_SAK(tty); |
2112 | } else if (*status & UART_LSR_PE) { | |
2113 | flag = TTY_PARITY; | |
2114 | port->icount.parity++; | |
2115 | } else if (*status & UART_LSR_FE) { | |
2116 | flag = TTY_FRAME; | |
2117 | port->icount.frame++; | |
2118 | } else if (*status & UART_LSR_OE) { | |
2119 | flag = TTY_OVERRUN; | |
2120 | port->icount.overrun++; | |
2121 | } else | |
2122 | flag = TTY_BREAK; | |
2123 | } | |
2124 | tty_insert_flip_char(tty, ch, flag); | |
2125 | cnt++; | |
2126 | if (cnt >= recv_room) { | |
2127 | if (!port->ldisc_stop_rx) | |
2128 | mxser_stoprx(tty); | |
2129 | break; | |
2130 | } | |
1da177e4 | 2131 | |
1c45607a | 2132 | } |
1da177e4 | 2133 | |
1c45607a JS |
2134 | if (port->board->chip_flag) |
2135 | break; | |
1da177e4 | 2136 | |
1c45607a JS |
2137 | *status = inb(port->ioaddr + UART_LSR); |
2138 | } while (*status & UART_LSR_DR); | |
1da177e4 | 2139 | |
1c45607a | 2140 | end_intr: |
216ba023 | 2141 | mxvar_log.rxcnt[tty->index] += cnt; |
1c45607a JS |
2142 | port->mon_data.rxcnt += cnt; |
2143 | port->mon_data.up_rxcnt += cnt; | |
1da177e4 | 2144 | |
1c45607a JS |
2145 | /* |
2146 | * We are called from an interrupt context with &port->slock | |
2147 | * being held. Drop it temporarily in order to prevent | |
2148 | * recursive locking. | |
2149 | */ | |
2150 | spin_unlock(&port->slock); | |
2151 | tty_flip_buffer_push(tty); | |
2152 | spin_lock(&port->slock); | |
1da177e4 LT |
2153 | } |
2154 | ||
216ba023 | 2155 | static void mxser_transmit_chars(struct tty_struct *tty, struct mxser_port *port) |
1da177e4 | 2156 | { |
1c45607a | 2157 | int count, cnt; |
1da177e4 | 2158 | |
1c45607a JS |
2159 | if (port->x_char) { |
2160 | outb(port->x_char, port->ioaddr + UART_TX); | |
2161 | port->x_char = 0; | |
216ba023 | 2162 | mxvar_log.txcnt[tty->index]++; |
1c45607a JS |
2163 | port->mon_data.txcnt++; |
2164 | port->mon_data.up_txcnt++; | |
2165 | port->icount.tx++; | |
2166 | return; | |
2167 | } | |
1da177e4 | 2168 | |
0ad9e7d1 | 2169 | if (port->port.xmit_buf == NULL) |
1c45607a | 2170 | return; |
1da177e4 | 2171 | |
216ba023 AC |
2172 | if (port->xmit_cnt <= 0 || tty->stopped || |
2173 | (tty->hw_stopped && | |
1c45607a JS |
2174 | (port->type != PORT_16550A) && |
2175 | (!port->board->chip_flag))) { | |
2176 | port->IER &= ~UART_IER_THRI; | |
2177 | outb(port->IER, port->ioaddr + UART_IER); | |
2178 | return; | |
1da177e4 LT |
2179 | } |
2180 | ||
1c45607a JS |
2181 | cnt = port->xmit_cnt; |
2182 | count = port->xmit_fifo_size; | |
2183 | do { | |
0ad9e7d1 | 2184 | outb(port->port.xmit_buf[port->xmit_tail++], |
1c45607a JS |
2185 | port->ioaddr + UART_TX); |
2186 | port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1); | |
2187 | if (--port->xmit_cnt <= 0) | |
2188 | break; | |
2189 | } while (--count > 0); | |
216ba023 | 2190 | mxvar_log.txcnt[tty->index] += (cnt - port->xmit_cnt); |
1da177e4 | 2191 | |
1c45607a JS |
2192 | port->mon_data.txcnt += (cnt - port->xmit_cnt); |
2193 | port->mon_data.up_txcnt += (cnt - port->xmit_cnt); | |
2194 | port->icount.tx += (cnt - port->xmit_cnt); | |
1da177e4 | 2195 | |
464eb8f5 | 2196 | if (port->xmit_cnt < WAKEUP_CHARS) |
216ba023 | 2197 | tty_wakeup(tty); |
1c45607a JS |
2198 | |
2199 | if (port->xmit_cnt <= 0) { | |
2200 | port->IER &= ~UART_IER_THRI; | |
2201 | outb(port->IER, port->ioaddr + UART_IER); | |
1da177e4 | 2202 | } |
1da177e4 LT |
2203 | } |
2204 | ||
2205 | /* | |
1c45607a | 2206 | * This is the serial driver's generic interrupt routine |
1da177e4 | 2207 | */ |
1c45607a | 2208 | static irqreturn_t mxser_interrupt(int irq, void *dev_id) |
1da177e4 | 2209 | { |
1c45607a JS |
2210 | int status, iir, i; |
2211 | struct mxser_board *brd = NULL; | |
2212 | struct mxser_port *port; | |
2213 | int max, irqbits, bits, msr; | |
2214 | unsigned int int_cnt, pass_counter = 0; | |
2215 | int handled = IRQ_NONE; | |
216ba023 | 2216 | struct tty_struct *tty; |
1da177e4 | 2217 | |
1c45607a JS |
2218 | for (i = 0; i < MXSER_BOARDS; i++) |
2219 | if (dev_id == &mxser_boards[i]) { | |
2220 | brd = dev_id; | |
2221 | break; | |
2222 | } | |
1da177e4 | 2223 | |
1c45607a JS |
2224 | if (i == MXSER_BOARDS) |
2225 | goto irq_stop; | |
2226 | if (brd == NULL) | |
2227 | goto irq_stop; | |
2228 | max = brd->info->nports; | |
2229 | while (pass_counter++ < MXSER_ISR_PASS_LIMIT) { | |
2230 | irqbits = inb(brd->vector) & brd->vector_mask; | |
2231 | if (irqbits == brd->vector_mask) | |
2232 | break; | |
1da177e4 | 2233 | |
1c45607a JS |
2234 | handled = IRQ_HANDLED; |
2235 | for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) { | |
2236 | if (irqbits == brd->vector_mask) | |
2237 | break; | |
2238 | if (bits & irqbits) | |
2239 | continue; | |
2240 | port = &brd->ports[i]; | |
2241 | ||
2242 | int_cnt = 0; | |
2243 | spin_lock(&port->slock); | |
2244 | do { | |
2245 | iir = inb(port->ioaddr + UART_IIR); | |
2246 | if (iir & UART_IIR_NO_INT) | |
2247 | break; | |
2248 | iir &= MOXA_MUST_IIR_MASK; | |
216ba023 AC |
2249 | tty = tty_port_tty_get(&port->port); |
2250 | if (!tty || | |
0ad9e7d1 AC |
2251 | (port->port.flags & ASYNC_CLOSING) || |
2252 | !(port->port.flags & | |
1c45607a JS |
2253 | ASYNC_INITIALIZED)) { |
2254 | status = inb(port->ioaddr + UART_LSR); | |
2255 | outb(0x27, port->ioaddr + UART_FCR); | |
2256 | inb(port->ioaddr + UART_MSR); | |
216ba023 | 2257 | tty_kref_put(tty); |
1c45607a JS |
2258 | break; |
2259 | } | |
1da177e4 | 2260 | |
1c45607a JS |
2261 | status = inb(port->ioaddr + UART_LSR); |
2262 | ||
2263 | if (status & UART_LSR_PE) | |
2264 | port->err_shadow |= NPPI_NOTIFY_PARITY; | |
2265 | if (status & UART_LSR_FE) | |
2266 | port->err_shadow |= NPPI_NOTIFY_FRAMING; | |
2267 | if (status & UART_LSR_OE) | |
2268 | port->err_shadow |= | |
2269 | NPPI_NOTIFY_HW_OVERRUN; | |
2270 | if (status & UART_LSR_BI) | |
2271 | port->err_shadow |= NPPI_NOTIFY_BREAK; | |
2272 | ||
2273 | if (port->board->chip_flag) { | |
2274 | if (iir == MOXA_MUST_IIR_GDA || | |
2275 | iir == MOXA_MUST_IIR_RDA || | |
2276 | iir == MOXA_MUST_IIR_RTO || | |
2277 | iir == MOXA_MUST_IIR_LSR) | |
216ba023 | 2278 | mxser_receive_chars(tty, port, |
1c45607a JS |
2279 | &status); |
2280 | ||
2281 | } else { | |
2282 | status &= port->read_status_mask; | |
2283 | if (status & UART_LSR_DR) | |
216ba023 | 2284 | mxser_receive_chars(tty, port, |
1c45607a JS |
2285 | &status); |
2286 | } | |
2287 | msr = inb(port->ioaddr + UART_MSR); | |
2288 | if (msr & UART_MSR_ANY_DELTA) | |
216ba023 | 2289 | mxser_check_modem_status(tty, port, msr); |
1c45607a JS |
2290 | |
2291 | if (port->board->chip_flag) { | |
2292 | if (iir == 0x02 && (status & | |
2293 | UART_LSR_THRE)) | |
216ba023 | 2294 | mxser_transmit_chars(tty, port); |
1c45607a JS |
2295 | } else { |
2296 | if (status & UART_LSR_THRE) | |
216ba023 | 2297 | mxser_transmit_chars(tty, port); |
1c45607a | 2298 | } |
216ba023 | 2299 | tty_kref_put(tty); |
1c45607a JS |
2300 | } while (int_cnt++ < MXSER_ISR_PASS_LIMIT); |
2301 | spin_unlock(&port->slock); | |
2302 | } | |
2303 | } | |
1da177e4 | 2304 | |
1c45607a JS |
2305 | irq_stop: |
2306 | return handled; | |
2307 | } | |
1da177e4 | 2308 | |
1c45607a JS |
2309 | static const struct tty_operations mxser_ops = { |
2310 | .open = mxser_open, | |
2311 | .close = mxser_close, | |
2312 | .write = mxser_write, | |
2313 | .put_char = mxser_put_char, | |
2314 | .flush_chars = mxser_flush_chars, | |
2315 | .write_room = mxser_write_room, | |
2316 | .chars_in_buffer = mxser_chars_in_buffer, | |
2317 | .flush_buffer = mxser_flush_buffer, | |
2318 | .ioctl = mxser_ioctl, | |
2319 | .throttle = mxser_throttle, | |
2320 | .unthrottle = mxser_unthrottle, | |
2321 | .set_termios = mxser_set_termios, | |
2322 | .stop = mxser_stop, | |
2323 | .start = mxser_start, | |
2324 | .hangup = mxser_hangup, | |
2325 | .break_ctl = mxser_rs_break, | |
2326 | .wait_until_sent = mxser_wait_until_sent, | |
2327 | .tiocmget = mxser_tiocmget, | |
2328 | .tiocmset = mxser_tiocmset, | |
0587102c | 2329 | .get_icount = mxser_get_icount, |
1c45607a | 2330 | }; |
1da177e4 | 2331 | |
31f35939 AC |
2332 | struct tty_port_operations mxser_port_ops = { |
2333 | .carrier_raised = mxser_carrier_raised, | |
fcc8ac18 | 2334 | .dtr_rts = mxser_dtr_rts, |
6769140d AC |
2335 | .activate = mxser_activate, |
2336 | .shutdown = mxser_shutdown_port, | |
31f35939 AC |
2337 | }; |
2338 | ||
1c45607a JS |
2339 | /* |
2340 | * The MOXA Smartio/Industio serial driver boot-time initialization code! | |
2341 | */ | |
1da177e4 | 2342 | |
df480518 | 2343 | static void mxser_release_ISA_res(struct mxser_board *brd) |
1c45607a | 2344 | { |
df480518 JS |
2345 | free_irq(brd->irq, brd); |
2346 | release_region(brd->ports[0].ioaddr, 8 * brd->info->nports); | |
2347 | release_region(brd->vector, 1); | |
1da177e4 LT |
2348 | } |
2349 | ||
1c45607a JS |
2350 | static int __devinit mxser_initbrd(struct mxser_board *brd, |
2351 | struct pci_dev *pdev) | |
1da177e4 | 2352 | { |
1c45607a JS |
2353 | struct mxser_port *info; |
2354 | unsigned int i; | |
2355 | int retval; | |
1da177e4 | 2356 | |
83766bc6 JS |
2357 | printk(KERN_INFO "mxser: max. baud rate = %d bps\n", |
2358 | brd->ports[0].max_baud); | |
1da177e4 | 2359 | |
1c45607a JS |
2360 | for (i = 0; i < brd->info->nports; i++) { |
2361 | info = &brd->ports[i]; | |
44b7d1b3 | 2362 | tty_port_init(&info->port); |
31f35939 | 2363 | info->port.ops = &mxser_port_ops; |
1c45607a JS |
2364 | info->board = brd; |
2365 | info->stop_rx = 0; | |
2366 | info->ldisc_stop_rx = 0; | |
1da177e4 | 2367 | |
1c45607a JS |
2368 | /* Enhance mode enabled here */ |
2369 | if (brd->chip_flag != MOXA_OTHER_UART) | |
148ff86b | 2370 | mxser_enable_must_enchance_mode(info->ioaddr); |
1da177e4 | 2371 | |
0ad9e7d1 | 2372 | info->port.flags = ASYNC_SHARE_IRQ; |
1c45607a | 2373 | info->type = brd->uart_type; |
1da177e4 | 2374 | |
1c45607a | 2375 | process_txrx_fifo(info); |
1da177e4 | 2376 | |
1c45607a | 2377 | info->custom_divisor = info->baud_base * 16; |
44b7d1b3 AC |
2378 | info->port.close_delay = 5 * HZ / 10; |
2379 | info->port.closing_wait = 30 * HZ; | |
1c45607a | 2380 | info->normal_termios = mxvar_sdriver->init_termios; |
1c45607a JS |
2381 | memset(&info->mon_data, 0, sizeof(struct mxser_mon)); |
2382 | info->err_shadow = 0; | |
2383 | spin_lock_init(&info->slock); | |
1da177e4 | 2384 | |
1c45607a JS |
2385 | /* before set INT ISR, disable all int */ |
2386 | outb(inb(info->ioaddr + UART_IER) & 0xf0, | |
2387 | info->ioaddr + UART_IER); | |
2388 | } | |
1da177e4 | 2389 | |
1c45607a JS |
2390 | retval = request_irq(brd->irq, mxser_interrupt, IRQF_SHARED, "mxser", |
2391 | brd); | |
df480518 | 2392 | if (retval) |
1c45607a JS |
2393 | printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may " |
2394 | "conflict with another device.\n", | |
2395 | brd->info->name, brd->irq); | |
df480518 | 2396 | |
1c45607a JS |
2397 | return retval; |
2398 | } | |
1da177e4 | 2399 | |
1c45607a | 2400 | static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd) |
1da177e4 LT |
2401 | { |
2402 | int id, i, bits; | |
2403 | unsigned short regs[16], irq; | |
2404 | unsigned char scratch, scratch2; | |
2405 | ||
1c45607a | 2406 | brd->chip_flag = MOXA_OTHER_UART; |
1da177e4 LT |
2407 | |
2408 | id = mxser_read_register(cap, regs); | |
1c45607a JS |
2409 | switch (id) { |
2410 | case C168_ASIC_ID: | |
2411 | brd->info = &mxser_cards[0]; | |
2412 | break; | |
2413 | case C104_ASIC_ID: | |
2414 | brd->info = &mxser_cards[1]; | |
2415 | break; | |
2416 | case CI104J_ASIC_ID: | |
2417 | brd->info = &mxser_cards[2]; | |
2418 | break; | |
2419 | case C102_ASIC_ID: | |
2420 | brd->info = &mxser_cards[5]; | |
2421 | break; | |
2422 | case CI132_ASIC_ID: | |
2423 | brd->info = &mxser_cards[6]; | |
2424 | break; | |
2425 | case CI134_ASIC_ID: | |
2426 | brd->info = &mxser_cards[7]; | |
2427 | break; | |
2428 | default: | |
8ea2c2ec | 2429 | return 0; |
1c45607a | 2430 | } |
1da177e4 LT |
2431 | |
2432 | irq = 0; | |
1c45607a JS |
2433 | /* some ISA cards have 2 ports, but we want to see them as 4-port (why?) |
2434 | Flag-hack checks if configuration should be read as 2-port here. */ | |
2435 | if (brd->info->nports == 2 || (brd->info->flags & MXSER_HAS2)) { | |
1da177e4 LT |
2436 | irq = regs[9] & 0xF000; |
2437 | irq = irq | (irq >> 4); | |
2438 | if (irq != (regs[9] & 0xFF00)) | |
83766bc6 | 2439 | goto err_irqconflict; |
1c45607a | 2440 | } else if (brd->info->nports == 4) { |
1da177e4 LT |
2441 | irq = regs[9] & 0xF000; |
2442 | irq = irq | (irq >> 4); | |
2443 | irq = irq | (irq >> 8); | |
2444 | if (irq != regs[9]) | |
83766bc6 | 2445 | goto err_irqconflict; |
1c45607a | 2446 | } else if (brd->info->nports == 8) { |
1da177e4 LT |
2447 | irq = regs[9] & 0xF000; |
2448 | irq = irq | (irq >> 4); | |
2449 | irq = irq | (irq >> 8); | |
2450 | if ((irq != regs[9]) || (irq != regs[10])) | |
83766bc6 | 2451 | goto err_irqconflict; |
1da177e4 LT |
2452 | } |
2453 | ||
83766bc6 JS |
2454 | if (!irq) { |
2455 | printk(KERN_ERR "mxser: interrupt number unset\n"); | |
2456 | return -EIO; | |
2457 | } | |
1c45607a | 2458 | brd->irq = ((int)(irq & 0xF000) >> 12); |
1da177e4 | 2459 | for (i = 0; i < 8; i++) |
1c45607a | 2460 | brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8; |
83766bc6 JS |
2461 | if ((regs[12] & 0x80) == 0) { |
2462 | printk(KERN_ERR "mxser: invalid interrupt vector\n"); | |
2463 | return -EIO; | |
2464 | } | |
1c45607a | 2465 | brd->vector = (int)regs[11]; /* interrupt vector */ |
1da177e4 | 2466 | if (id == 1) |
1c45607a | 2467 | brd->vector_mask = 0x00FF; |
1da177e4 | 2468 | else |
1c45607a | 2469 | brd->vector_mask = 0x000F; |
1da177e4 LT |
2470 | for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) { |
2471 | if (regs[12] & bits) { | |
1c45607a JS |
2472 | brd->ports[i].baud_base = 921600; |
2473 | brd->ports[i].max_baud = 921600; | |
1da177e4 | 2474 | } else { |
1c45607a JS |
2475 | brd->ports[i].baud_base = 115200; |
2476 | brd->ports[i].max_baud = 115200; | |
1da177e4 LT |
2477 | } |
2478 | } | |
2479 | scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB); | |
2480 | outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR); | |
2481 | outb(0, cap + UART_EFR); /* EFR is the same as FCR */ | |
2482 | outb(scratch2, cap + UART_LCR); | |
2483 | outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR); | |
2484 | scratch = inb(cap + UART_IIR); | |
2485 | ||
2486 | if (scratch & 0xC0) | |
1c45607a | 2487 | brd->uart_type = PORT_16550A; |
1da177e4 | 2488 | else |
1c45607a JS |
2489 | brd->uart_type = PORT_16450; |
2490 | if (!request_region(brd->ports[0].ioaddr, 8 * brd->info->nports, | |
83766bc6 JS |
2491 | "mxser(IO)")) { |
2492 | printk(KERN_ERR "mxser: can't request ports I/O region: " | |
2493 | "0x%.8lx-0x%.8lx\n", | |
2494 | brd->ports[0].ioaddr, brd->ports[0].ioaddr + | |
2495 | 8 * brd->info->nports - 1); | |
2496 | return -EIO; | |
2497 | } | |
1c45607a JS |
2498 | if (!request_region(brd->vector, 1, "mxser(vector)")) { |
2499 | release_region(brd->ports[0].ioaddr, 8 * brd->info->nports); | |
83766bc6 JS |
2500 | printk(KERN_ERR "mxser: can't request interrupt vector region: " |
2501 | "0x%.8lx-0x%.8lx\n", | |
2502 | brd->ports[0].ioaddr, brd->ports[0].ioaddr + | |
2503 | 8 * brd->info->nports - 1); | |
2504 | return -EIO; | |
1c45607a JS |
2505 | } |
2506 | return brd->info->nports; | |
83766bc6 JS |
2507 | |
2508 | err_irqconflict: | |
2509 | printk(KERN_ERR "mxser: invalid interrupt number\n"); | |
2510 | return -EIO; | |
1da177e4 LT |
2511 | } |
2512 | ||
1c45607a JS |
2513 | static int __devinit mxser_probe(struct pci_dev *pdev, |
2514 | const struct pci_device_id *ent) | |
1da177e4 | 2515 | { |
1c45607a JS |
2516 | #ifdef CONFIG_PCI |
2517 | struct mxser_board *brd; | |
2518 | unsigned int i, j; | |
2519 | unsigned long ioaddress; | |
2520 | int retval = -EINVAL; | |
1da177e4 | 2521 | |
1c45607a JS |
2522 | for (i = 0; i < MXSER_BOARDS; i++) |
2523 | if (mxser_boards[i].info == NULL) | |
2524 | break; | |
2525 | ||
2526 | if (i >= MXSER_BOARDS) { | |
83766bc6 JS |
2527 | dev_err(&pdev->dev, "too many boards found (maximum %d), board " |
2528 | "not configured\n", MXSER_BOARDS); | |
1c45607a JS |
2529 | goto err; |
2530 | } | |
2531 | ||
2532 | brd = &mxser_boards[i]; | |
2533 | brd->idx = i * MXSER_PORTS_PER_BOARD; | |
83766bc6 | 2534 | dev_info(&pdev->dev, "found MOXA %s board (BusNo=%d, DevNo=%d)\n", |
1c45607a JS |
2535 | mxser_cards[ent->driver_data].name, |
2536 | pdev->bus->number, PCI_SLOT(pdev->devfn)); | |
2537 | ||
2538 | retval = pci_enable_device(pdev); | |
2539 | if (retval) { | |
83766bc6 | 2540 | dev_err(&pdev->dev, "PCI enable failed\n"); |
1c45607a JS |
2541 | goto err; |
2542 | } | |
2543 | ||
2544 | /* io address */ | |
2545 | ioaddress = pci_resource_start(pdev, 2); | |
2546 | retval = pci_request_region(pdev, 2, "mxser(IO)"); | |
2547 | if (retval) | |
df480518 | 2548 | goto err_dis; |
1c45607a JS |
2549 | |
2550 | brd->info = &mxser_cards[ent->driver_data]; | |
2551 | for (i = 0; i < brd->info->nports; i++) | |
2552 | brd->ports[i].ioaddr = ioaddress + 8 * i; | |
2553 | ||
2554 | /* vector */ | |
2555 | ioaddress = pci_resource_start(pdev, 3); | |
2556 | retval = pci_request_region(pdev, 3, "mxser(vector)"); | |
2557 | if (retval) | |
df480518 | 2558 | goto err_zero; |
1c45607a JS |
2559 | brd->vector = ioaddress; |
2560 | ||
2561 | /* irq */ | |
2562 | brd->irq = pdev->irq; | |
2563 | ||
2564 | brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr); | |
2565 | brd->uart_type = PORT_16550A; | |
2566 | brd->vector_mask = 0; | |
2567 | ||
2568 | for (i = 0; i < brd->info->nports; i++) { | |
2569 | for (j = 0; j < UART_INFO_NUM; j++) { | |
2570 | if (Gpci_uart_info[j].type == brd->chip_flag) { | |
2571 | brd->ports[i].max_baud = | |
2572 | Gpci_uart_info[j].max_baud; | |
2573 | ||
2574 | /* exception....CP-102 */ | |
2575 | if (brd->info->flags & MXSER_HIGHBAUD) | |
2576 | brd->ports[i].max_baud = 921600; | |
2577 | break; | |
1da177e4 LT |
2578 | } |
2579 | } | |
1c45607a JS |
2580 | } |
2581 | ||
2582 | if (brd->chip_flag == MOXA_MUST_MU860_HWID) { | |
2583 | for (i = 0; i < brd->info->nports; i++) { | |
2584 | if (i < 4) | |
2585 | brd->ports[i].opmode_ioaddr = ioaddress + 4; | |
2586 | else | |
2587 | brd->ports[i].opmode_ioaddr = ioaddress + 0x0c; | |
1da177e4 | 2588 | } |
1c45607a JS |
2589 | outb(0, ioaddress + 4); /* default set to RS232 mode */ |
2590 | outb(0, ioaddress + 0x0c); /* default set to RS232 mode */ | |
1da177e4 | 2591 | } |
1c45607a JS |
2592 | |
2593 | for (i = 0; i < brd->info->nports; i++) { | |
2594 | brd->vector_mask |= (1 << i); | |
2595 | brd->ports[i].baud_base = 921600; | |
2596 | } | |
2597 | ||
2598 | /* mxser_initbrd will hook ISR. */ | |
2599 | retval = mxser_initbrd(brd, pdev); | |
2600 | if (retval) | |
df480518 | 2601 | goto err_rel3; |
1c45607a JS |
2602 | |
2603 | for (i = 0; i < brd->info->nports; i++) | |
2604 | tty_register_device(mxvar_sdriver, brd->idx + i, &pdev->dev); | |
2605 | ||
2606 | pci_set_drvdata(pdev, brd); | |
2607 | ||
2608 | return 0; | |
df480518 JS |
2609 | err_rel3: |
2610 | pci_release_region(pdev, 3); | |
2611 | err_zero: | |
1c45607a | 2612 | brd->info = NULL; |
df480518 JS |
2613 | pci_release_region(pdev, 2); |
2614 | err_dis: | |
2615 | pci_disable_device(pdev); | |
1c45607a JS |
2616 | err: |
2617 | return retval; | |
2618 | #else | |
2619 | return -ENODEV; | |
2620 | #endif | |
1da177e4 LT |
2621 | } |
2622 | ||
1c45607a | 2623 | static void __devexit mxser_remove(struct pci_dev *pdev) |
1da177e4 | 2624 | { |
df480518 | 2625 | #ifdef CONFIG_PCI |
1c45607a JS |
2626 | struct mxser_board *brd = pci_get_drvdata(pdev); |
2627 | unsigned int i; | |
1da177e4 | 2628 | |
1c45607a JS |
2629 | for (i = 0; i < brd->info->nports; i++) |
2630 | tty_unregister_device(mxvar_sdriver, brd->idx + i); | |
1da177e4 | 2631 | |
df480518 JS |
2632 | free_irq(pdev->irq, brd); |
2633 | pci_release_region(pdev, 2); | |
2634 | pci_release_region(pdev, 3); | |
2635 | pci_disable_device(pdev); | |
1c45607a | 2636 | brd->info = NULL; |
df480518 | 2637 | #endif |
1da177e4 LT |
2638 | } |
2639 | ||
1c45607a JS |
2640 | static struct pci_driver mxser_driver = { |
2641 | .name = "mxser", | |
2642 | .id_table = mxser_pcibrds, | |
2643 | .probe = mxser_probe, | |
2644 | .remove = __devexit_p(mxser_remove) | |
2645 | }; | |
2646 | ||
2647 | static int __init mxser_module_init(void) | |
1da177e4 | 2648 | { |
1c45607a | 2649 | struct mxser_board *brd; |
1df00924 JS |
2650 | unsigned int b, i, m; |
2651 | int retval; | |
1da177e4 | 2652 | |
1c45607a JS |
2653 | mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1); |
2654 | if (!mxvar_sdriver) | |
2655 | return -ENOMEM; | |
2656 | ||
2657 | printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n", | |
2658 | MXSER_VERSION); | |
2659 | ||
2660 | /* Initialize the tty_driver structure */ | |
2661 | mxvar_sdriver->owner = THIS_MODULE; | |
2662 | mxvar_sdriver->magic = TTY_DRIVER_MAGIC; | |
2663 | mxvar_sdriver->name = "ttyMI"; | |
2664 | mxvar_sdriver->major = ttymajor; | |
2665 | mxvar_sdriver->minor_start = 0; | |
2666 | mxvar_sdriver->num = MXSER_PORTS + 1; | |
2667 | mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL; | |
2668 | mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL; | |
2669 | mxvar_sdriver->init_termios = tty_std_termios; | |
2670 | mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL; | |
2671 | mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_DYNAMIC_DEV; | |
2672 | tty_set_operations(mxvar_sdriver, &mxser_ops); | |
2673 | ||
2674 | retval = tty_register_driver(mxvar_sdriver); | |
2675 | if (retval) { | |
2676 | printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family " | |
2677 | "tty driver !\n"); | |
2678 | goto err_put; | |
1da177e4 | 2679 | } |
1c45607a | 2680 | |
1c45607a | 2681 | /* Start finding ISA boards here */ |
1df00924 JS |
2682 | for (m = 0, b = 0; b < MXSER_BOARDS; b++) { |
2683 | if (!ioaddr[b]) | |
2684 | continue; | |
2685 | ||
2686 | brd = &mxser_boards[m]; | |
96050dfb | 2687 | retval = mxser_get_ISA_conf(ioaddr[b], brd); |
1df00924 JS |
2688 | if (retval <= 0) { |
2689 | brd->info = NULL; | |
2690 | continue; | |
2691 | } | |
1c45607a | 2692 | |
1df00924 JS |
2693 | printk(KERN_INFO "mxser: found MOXA %s board (CAP=0x%lx)\n", |
2694 | brd->info->name, ioaddr[b]); | |
83766bc6 | 2695 | |
1df00924 JS |
2696 | /* mxser_initbrd will hook ISR. */ |
2697 | if (mxser_initbrd(brd, NULL) < 0) { | |
2698 | brd->info = NULL; | |
2699 | continue; | |
2700 | } | |
1c45607a | 2701 | |
1df00924 JS |
2702 | brd->idx = m * MXSER_PORTS_PER_BOARD; |
2703 | for (i = 0; i < brd->info->nports; i++) | |
2704 | tty_register_device(mxvar_sdriver, brd->idx + i, NULL); | |
1c45607a | 2705 | |
1df00924 JS |
2706 | m++; |
2707 | } | |
1c45607a JS |
2708 | |
2709 | retval = pci_register_driver(&mxser_driver); | |
2710 | if (retval) { | |
83766bc6 | 2711 | printk(KERN_ERR "mxser: can't register pci driver\n"); |
1c45607a JS |
2712 | if (!m) { |
2713 | retval = -ENODEV; | |
2714 | goto err_unr; | |
2715 | } /* else: we have some ISA cards under control */ | |
2716 | } | |
2717 | ||
1c45607a JS |
2718 | return 0; |
2719 | err_unr: | |
2720 | tty_unregister_driver(mxvar_sdriver); | |
2721 | err_put: | |
2722 | put_tty_driver(mxvar_sdriver); | |
2723 | return retval; | |
2724 | } | |
2725 | ||
2726 | static void __exit mxser_module_exit(void) | |
2727 | { | |
2728 | unsigned int i, j; | |
2729 | ||
1c45607a JS |
2730 | pci_unregister_driver(&mxser_driver); |
2731 | ||
2732 | for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */ | |
2733 | if (mxser_boards[i].info != NULL) | |
2734 | for (j = 0; j < mxser_boards[i].info->nports; j++) | |
2735 | tty_unregister_device(mxvar_sdriver, | |
2736 | mxser_boards[i].idx + j); | |
2737 | tty_unregister_driver(mxvar_sdriver); | |
2738 | put_tty_driver(mxvar_sdriver); | |
2739 | ||
2740 | for (i = 0; i < MXSER_BOARDS; i++) | |
2741 | if (mxser_boards[i].info != NULL) | |
df480518 | 2742 | mxser_release_ISA_res(&mxser_boards[i]); |
1da177e4 LT |
2743 | } |
2744 | ||
2745 | module_init(mxser_module_init); | |
2746 | module_exit(mxser_module_exit); |