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1 | // SPDX-License-Identifier: GPL-2.0+ | |
2 | /* | |
3 | * mxser.c -- MOXA Smartio/Industio family multiport serial driver. | |
4 | * | |
5 | * Copyright (C) 1999-2006 Moxa Technologies (support@moxa.com). | |
6 | * Copyright (C) 2006-2008 Jiri Slaby <jirislaby@gmail.com> | |
7 | * | |
8 | * This code is loosely based on the 1.8 moxa driver which is based on | |
9 | * Linux serial driver, written by Linus Torvalds, Theodore T'so and | |
10 | * others. | |
11 | * | |
12 | * Fed through a cleanup, indent and remove of non 2.6 code by Alan Cox | |
13 | * <alan@lxorguk.ukuu.org.uk>. The original 1.8 code is available on | |
14 | * www.moxa.com. | |
15 | * - Fixed x86_64 cleanness | |
16 | */ | |
17 | ||
18 | #include <linux/module.h> | |
19 | #include <linux/errno.h> | |
20 | #include <linux/signal.h> | |
21 | #include <linux/sched.h> | |
22 | #include <linux/timer.h> | |
23 | #include <linux/interrupt.h> | |
24 | #include <linux/tty.h> | |
25 | #include <linux/tty_flip.h> | |
26 | #include <linux/serial.h> | |
27 | #include <linux/serial_reg.h> | |
28 | #include <linux/major.h> | |
29 | #include <linux/string.h> | |
30 | #include <linux/fcntl.h> | |
31 | #include <linux/ptrace.h> | |
32 | #include <linux/ioport.h> | |
33 | #include <linux/mm.h> | |
34 | #include <linux/delay.h> | |
35 | #include <linux/pci.h> | |
36 | #include <linux/bitops.h> | |
37 | #include <linux/slab.h> | |
38 | #include <linux/ratelimit.h> | |
39 | ||
40 | #include <asm/io.h> | |
41 | #include <asm/irq.h> | |
42 | #include <linux/uaccess.h> | |
43 | ||
44 | #include "mxser.h" | |
45 | ||
46 | #define MXSER_VERSION "2.0.5" /* 1.14 */ | |
47 | #define MXSERMAJOR 174 | |
48 | ||
49 | #define MXSER_BOARDS 4 /* Max. boards */ | |
50 | #define MXSER_PORTS_PER_BOARD 8 /* Max. ports per board */ | |
51 | #define MXSER_PORTS (MXSER_BOARDS * MXSER_PORTS_PER_BOARD) | |
52 | #define MXSER_ISR_PASS_LIMIT 100 | |
53 | ||
54 | /*CheckIsMoxaMust return value*/ | |
55 | #define MOXA_OTHER_UART 0x00 | |
56 | #define MOXA_MUST_MU150_HWID 0x01 | |
57 | #define MOXA_MUST_MU860_HWID 0x02 | |
58 | ||
59 | #define WAKEUP_CHARS 256 | |
60 | ||
61 | #define UART_MCR_AFE 0x20 | |
62 | #define UART_LSR_SPECIAL 0x1E | |
63 | ||
64 | #define PCI_DEVICE_ID_POS104UL 0x1044 | |
65 | #define PCI_DEVICE_ID_CB108 0x1080 | |
66 | #define PCI_DEVICE_ID_CP102UF 0x1023 | |
67 | #define PCI_DEVICE_ID_CP112UL 0x1120 | |
68 | #define PCI_DEVICE_ID_CB114 0x1142 | |
69 | #define PCI_DEVICE_ID_CP114UL 0x1143 | |
70 | #define PCI_DEVICE_ID_CB134I 0x1341 | |
71 | #define PCI_DEVICE_ID_CP138U 0x1380 | |
72 | ||
73 | ||
74 | #define C168_ASIC_ID 1 | |
75 | #define C104_ASIC_ID 2 | |
76 | #define C102_ASIC_ID 0xB | |
77 | #define CI132_ASIC_ID 4 | |
78 | #define CI134_ASIC_ID 3 | |
79 | #define CI104J_ASIC_ID 5 | |
80 | ||
81 | #define MXSER_HIGHBAUD 1 | |
82 | #define MXSER_HAS2 2 | |
83 | ||
84 | /* This is only for PCI */ | |
85 | static const struct { | |
86 | int type; | |
87 | int tx_fifo; | |
88 | int rx_fifo; | |
89 | int xmit_fifo_size; | |
90 | int rx_high_water; | |
91 | int rx_trigger; | |
92 | int rx_low_water; | |
93 | long max_baud; | |
94 | } Gpci_uart_info[] = { | |
95 | {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L}, | |
96 | {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L}, | |
97 | {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L} | |
98 | }; | |
99 | #define UART_INFO_NUM ARRAY_SIZE(Gpci_uart_info) | |
100 | ||
101 | struct mxser_cardinfo { | |
102 | char *name; | |
103 | unsigned int nports; | |
104 | unsigned int flags; | |
105 | }; | |
106 | ||
107 | static const struct mxser_cardinfo mxser_cards[] = { | |
108 | /* 0*/ { "C168 series", 8, }, | |
109 | { "C104 series", 4, }, | |
110 | { "CI-104J series", 4, }, | |
111 | { "C168H/PCI series", 8, }, | |
112 | { "C104H/PCI series", 4, }, | |
113 | /* 5*/ { "C102 series", 4, MXSER_HAS2 }, /* C102-ISA */ | |
114 | { "CI-132 series", 4, MXSER_HAS2 }, | |
115 | { "CI-134 series", 4, }, | |
116 | { "CP-132 series", 2, }, | |
117 | { "CP-114 series", 4, }, | |
118 | /*10*/ { "CT-114 series", 4, }, | |
119 | { "CP-102 series", 2, MXSER_HIGHBAUD }, | |
120 | { "CP-104U series", 4, }, | |
121 | { "CP-168U series", 8, }, | |
122 | { "CP-132U series", 2, }, | |
123 | /*15*/ { "CP-134U series", 4, }, | |
124 | { "CP-104JU series", 4, }, | |
125 | { "Moxa UC7000 Serial", 8, }, /* RC7000 */ | |
126 | { "CP-118U series", 8, }, | |
127 | { "CP-102UL series", 2, }, | |
128 | /*20*/ { "CP-102U series", 2, }, | |
129 | { "CP-118EL series", 8, }, | |
130 | { "CP-168EL series", 8, }, | |
131 | { "CP-104EL series", 4, }, | |
132 | { "CB-108 series", 8, }, | |
133 | /*25*/ { "CB-114 series", 4, }, | |
134 | { "CB-134I series", 4, }, | |
135 | { "CP-138U series", 8, }, | |
136 | { "POS-104UL series", 4, }, | |
137 | { "CP-114UL series", 4, }, | |
138 | /*30*/ { "CP-102UF series", 2, }, | |
139 | { "CP-112UL series", 2, }, | |
140 | }; | |
141 | ||
142 | /* driver_data correspond to the lines in the structure above | |
143 | see also ISA probe function before you change something */ | |
144 | static const struct pci_device_id mxser_pcibrds[] = { | |
145 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C168), .driver_data = 3 }, | |
146 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C104), .driver_data = 4 }, | |
147 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132), .driver_data = 8 }, | |
148 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP114), .driver_data = 9 }, | |
149 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CT114), .driver_data = 10 }, | |
150 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102), .driver_data = 11 }, | |
151 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104U), .driver_data = 12 }, | |
152 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168U), .driver_data = 13 }, | |
153 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132U), .driver_data = 14 }, | |
154 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP134U), .driver_data = 15 }, | |
155 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104JU),.driver_data = 16 }, | |
156 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_RC7000), .driver_data = 17 }, | |
157 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118U), .driver_data = 18 }, | |
158 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102UL),.driver_data = 19 }, | |
159 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102U), .driver_data = 20 }, | |
160 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118EL),.driver_data = 21 }, | |
161 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168EL),.driver_data = 22 }, | |
162 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104EL),.driver_data = 23 }, | |
163 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB108), .driver_data = 24 }, | |
164 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB114), .driver_data = 25 }, | |
165 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB134I), .driver_data = 26 }, | |
166 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP138U), .driver_data = 27 }, | |
167 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_POS104UL), .driver_data = 28 }, | |
168 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP114UL), .driver_data = 29 }, | |
169 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP102UF), .driver_data = 30 }, | |
170 | { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP112UL), .driver_data = 31 }, | |
171 | { } | |
172 | }; | |
173 | MODULE_DEVICE_TABLE(pci, mxser_pcibrds); | |
174 | ||
175 | static unsigned long ioaddr[MXSER_BOARDS]; | |
176 | static int ttymajor = MXSERMAJOR; | |
177 | ||
178 | /* Variables for insmod */ | |
179 | ||
180 | MODULE_AUTHOR("Casper Yang"); | |
181 | MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver"); | |
182 | module_param_hw_array(ioaddr, ulong, ioport, NULL, 0); | |
183 | MODULE_PARM_DESC(ioaddr, "ISA io addresses to look for a moxa board"); | |
184 | module_param(ttymajor, int, 0); | |
185 | MODULE_LICENSE("GPL"); | |
186 | ||
187 | struct mxser_log { | |
188 | int tick; | |
189 | unsigned long rxcnt[MXSER_PORTS]; | |
190 | unsigned long txcnt[MXSER_PORTS]; | |
191 | }; | |
192 | ||
193 | struct mxser_mon { | |
194 | unsigned long rxcnt; | |
195 | unsigned long txcnt; | |
196 | unsigned long up_rxcnt; | |
197 | unsigned long up_txcnt; | |
198 | int modem_status; | |
199 | unsigned char hold_reason; | |
200 | }; | |
201 | ||
202 | struct mxser_mon_ext { | |
203 | unsigned long rx_cnt[32]; | |
204 | unsigned long tx_cnt[32]; | |
205 | unsigned long up_rxcnt[32]; | |
206 | unsigned long up_txcnt[32]; | |
207 | int modem_status[32]; | |
208 | ||
209 | long baudrate[32]; | |
210 | int databits[32]; | |
211 | int stopbits[32]; | |
212 | int parity[32]; | |
213 | int flowctrl[32]; | |
214 | int fifo[32]; | |
215 | int iftype[32]; | |
216 | }; | |
217 | ||
218 | struct mxser_board; | |
219 | ||
220 | struct mxser_port { | |
221 | struct tty_port port; | |
222 | struct mxser_board *board; | |
223 | ||
224 | unsigned long ioaddr; | |
225 | unsigned long opmode_ioaddr; | |
226 | int max_baud; | |
227 | ||
228 | int rx_high_water; | |
229 | int rx_trigger; /* Rx fifo trigger level */ | |
230 | int rx_low_water; | |
231 | int baud_base; /* max. speed */ | |
232 | int type; /* UART type */ | |
233 | ||
234 | int x_char; /* xon/xoff character */ | |
235 | int IER; /* Interrupt Enable Register */ | |
236 | int MCR; /* Modem control register */ | |
237 | ||
238 | unsigned char stop_rx; | |
239 | unsigned char ldisc_stop_rx; | |
240 | ||
241 | int custom_divisor; | |
242 | unsigned char err_shadow; | |
243 | ||
244 | struct async_icount icount; /* kernel counters for 4 input interrupts */ | |
245 | unsigned int timeout; | |
246 | ||
247 | int read_status_mask; | |
248 | int ignore_status_mask; | |
249 | unsigned int xmit_fifo_size; | |
250 | int xmit_head; | |
251 | int xmit_tail; | |
252 | int xmit_cnt; | |
253 | int closing; | |
254 | ||
255 | struct ktermios normal_termios; | |
256 | ||
257 | struct mxser_mon mon_data; | |
258 | ||
259 | spinlock_t slock; | |
260 | }; | |
261 | ||
262 | struct mxser_board { | |
263 | unsigned int idx; | |
264 | int irq; | |
265 | const struct mxser_cardinfo *info; | |
266 | unsigned long vector; | |
267 | unsigned long vector_mask; | |
268 | ||
269 | int chip_flag; | |
270 | int uart_type; | |
271 | ||
272 | struct mxser_port ports[MXSER_PORTS_PER_BOARD]; | |
273 | }; | |
274 | ||
275 | struct mxser_mstatus { | |
276 | tcflag_t cflag; | |
277 | int cts; | |
278 | int dsr; | |
279 | int ri; | |
280 | int dcd; | |
281 | }; | |
282 | ||
283 | static struct mxser_board mxser_boards[MXSER_BOARDS]; | |
284 | static struct tty_driver *mxvar_sdriver; | |
285 | static struct mxser_log mxvar_log; | |
286 | static int mxser_set_baud_method[MXSER_PORTS + 1]; | |
287 | ||
288 | static void mxser_enable_must_enchance_mode(unsigned long baseio) | |
289 | { | |
290 | u8 oldlcr; | |
291 | u8 efr; | |
292 | ||
293 | oldlcr = inb(baseio + UART_LCR); | |
294 | outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); | |
295 | ||
296 | efr = inb(baseio + MOXA_MUST_EFR_REGISTER); | |
297 | efr |= MOXA_MUST_EFR_EFRB_ENABLE; | |
298 | ||
299 | outb(efr, baseio + MOXA_MUST_EFR_REGISTER); | |
300 | outb(oldlcr, baseio + UART_LCR); | |
301 | } | |
302 | ||
303 | #ifdef CONFIG_PCI | |
304 | static void mxser_disable_must_enchance_mode(unsigned long baseio) | |
305 | { | |
306 | u8 oldlcr; | |
307 | u8 efr; | |
308 | ||
309 | oldlcr = inb(baseio + UART_LCR); | |
310 | outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); | |
311 | ||
312 | efr = inb(baseio + MOXA_MUST_EFR_REGISTER); | |
313 | efr &= ~MOXA_MUST_EFR_EFRB_ENABLE; | |
314 | ||
315 | outb(efr, baseio + MOXA_MUST_EFR_REGISTER); | |
316 | outb(oldlcr, baseio + UART_LCR); | |
317 | } | |
318 | #endif | |
319 | ||
320 | static void mxser_set_must_xon1_value(unsigned long baseio, u8 value) | |
321 | { | |
322 | u8 oldlcr; | |
323 | u8 efr; | |
324 | ||
325 | oldlcr = inb(baseio + UART_LCR); | |
326 | outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); | |
327 | ||
328 | efr = inb(baseio + MOXA_MUST_EFR_REGISTER); | |
329 | efr &= ~MOXA_MUST_EFR_BANK_MASK; | |
330 | efr |= MOXA_MUST_EFR_BANK0; | |
331 | ||
332 | outb(efr, baseio + MOXA_MUST_EFR_REGISTER); | |
333 | outb(value, baseio + MOXA_MUST_XON1_REGISTER); | |
334 | outb(oldlcr, baseio + UART_LCR); | |
335 | } | |
336 | ||
337 | static void mxser_set_must_xoff1_value(unsigned long baseio, u8 value) | |
338 | { | |
339 | u8 oldlcr; | |
340 | u8 efr; | |
341 | ||
342 | oldlcr = inb(baseio + UART_LCR); | |
343 | outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); | |
344 | ||
345 | efr = inb(baseio + MOXA_MUST_EFR_REGISTER); | |
346 | efr &= ~MOXA_MUST_EFR_BANK_MASK; | |
347 | efr |= MOXA_MUST_EFR_BANK0; | |
348 | ||
349 | outb(efr, baseio + MOXA_MUST_EFR_REGISTER); | |
350 | outb(value, baseio + MOXA_MUST_XOFF1_REGISTER); | |
351 | outb(oldlcr, baseio + UART_LCR); | |
352 | } | |
353 | ||
354 | static void mxser_set_must_fifo_value(struct mxser_port *info) | |
355 | { | |
356 | u8 oldlcr; | |
357 | u8 efr; | |
358 | ||
359 | oldlcr = inb(info->ioaddr + UART_LCR); | |
360 | outb(MOXA_MUST_ENTER_ENCHANCE, info->ioaddr + UART_LCR); | |
361 | ||
362 | efr = inb(info->ioaddr + MOXA_MUST_EFR_REGISTER); | |
363 | efr &= ~MOXA_MUST_EFR_BANK_MASK; | |
364 | efr |= MOXA_MUST_EFR_BANK1; | |
365 | ||
366 | outb(efr, info->ioaddr + MOXA_MUST_EFR_REGISTER); | |
367 | outb((u8)info->rx_high_water, info->ioaddr + MOXA_MUST_RBRTH_REGISTER); | |
368 | outb((u8)info->rx_trigger, info->ioaddr + MOXA_MUST_RBRTI_REGISTER); | |
369 | outb((u8)info->rx_low_water, info->ioaddr + MOXA_MUST_RBRTL_REGISTER); | |
370 | outb(oldlcr, info->ioaddr + UART_LCR); | |
371 | } | |
372 | ||
373 | static void mxser_set_must_enum_value(unsigned long baseio, u8 value) | |
374 | { | |
375 | u8 oldlcr; | |
376 | u8 efr; | |
377 | ||
378 | oldlcr = inb(baseio + UART_LCR); | |
379 | outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); | |
380 | ||
381 | efr = inb(baseio + MOXA_MUST_EFR_REGISTER); | |
382 | efr &= ~MOXA_MUST_EFR_BANK_MASK; | |
383 | efr |= MOXA_MUST_EFR_BANK2; | |
384 | ||
385 | outb(efr, baseio + MOXA_MUST_EFR_REGISTER); | |
386 | outb(value, baseio + MOXA_MUST_ENUM_REGISTER); | |
387 | outb(oldlcr, baseio + UART_LCR); | |
388 | } | |
389 | ||
390 | #ifdef CONFIG_PCI | |
391 | static void mxser_get_must_hardware_id(unsigned long baseio, u8 *pId) | |
392 | { | |
393 | u8 oldlcr; | |
394 | u8 efr; | |
395 | ||
396 | oldlcr = inb(baseio + UART_LCR); | |
397 | outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); | |
398 | ||
399 | efr = inb(baseio + MOXA_MUST_EFR_REGISTER); | |
400 | efr &= ~MOXA_MUST_EFR_BANK_MASK; | |
401 | efr |= MOXA_MUST_EFR_BANK2; | |
402 | ||
403 | outb(efr, baseio + MOXA_MUST_EFR_REGISTER); | |
404 | *pId = inb(baseio + MOXA_MUST_HWID_REGISTER); | |
405 | outb(oldlcr, baseio + UART_LCR); | |
406 | } | |
407 | #endif | |
408 | ||
409 | static void SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(unsigned long baseio) | |
410 | { | |
411 | u8 oldlcr; | |
412 | u8 efr; | |
413 | ||
414 | oldlcr = inb(baseio + UART_LCR); | |
415 | outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); | |
416 | ||
417 | efr = inb(baseio + MOXA_MUST_EFR_REGISTER); | |
418 | efr &= ~MOXA_MUST_EFR_SF_MASK; | |
419 | ||
420 | outb(efr, baseio + MOXA_MUST_EFR_REGISTER); | |
421 | outb(oldlcr, baseio + UART_LCR); | |
422 | } | |
423 | ||
424 | static void mxser_enable_must_tx_software_flow_control(unsigned long baseio) | |
425 | { | |
426 | u8 oldlcr; | |
427 | u8 efr; | |
428 | ||
429 | oldlcr = inb(baseio + UART_LCR); | |
430 | outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); | |
431 | ||
432 | efr = inb(baseio + MOXA_MUST_EFR_REGISTER); | |
433 | efr &= ~MOXA_MUST_EFR_SF_TX_MASK; | |
434 | efr |= MOXA_MUST_EFR_SF_TX1; | |
435 | ||
436 | outb(efr, baseio + MOXA_MUST_EFR_REGISTER); | |
437 | outb(oldlcr, baseio + UART_LCR); | |
438 | } | |
439 | ||
440 | static void mxser_disable_must_tx_software_flow_control(unsigned long baseio) | |
441 | { | |
442 | u8 oldlcr; | |
443 | u8 efr; | |
444 | ||
445 | oldlcr = inb(baseio + UART_LCR); | |
446 | outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); | |
447 | ||
448 | efr = inb(baseio + MOXA_MUST_EFR_REGISTER); | |
449 | efr &= ~MOXA_MUST_EFR_SF_TX_MASK; | |
450 | ||
451 | outb(efr, baseio + MOXA_MUST_EFR_REGISTER); | |
452 | outb(oldlcr, baseio + UART_LCR); | |
453 | } | |
454 | ||
455 | static void mxser_enable_must_rx_software_flow_control(unsigned long baseio) | |
456 | { | |
457 | u8 oldlcr; | |
458 | u8 efr; | |
459 | ||
460 | oldlcr = inb(baseio + UART_LCR); | |
461 | outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); | |
462 | ||
463 | efr = inb(baseio + MOXA_MUST_EFR_REGISTER); | |
464 | efr &= ~MOXA_MUST_EFR_SF_RX_MASK; | |
465 | efr |= MOXA_MUST_EFR_SF_RX1; | |
466 | ||
467 | outb(efr, baseio + MOXA_MUST_EFR_REGISTER); | |
468 | outb(oldlcr, baseio + UART_LCR); | |
469 | } | |
470 | ||
471 | static void mxser_disable_must_rx_software_flow_control(unsigned long baseio) | |
472 | { | |
473 | u8 oldlcr; | |
474 | u8 efr; | |
475 | ||
476 | oldlcr = inb(baseio + UART_LCR); | |
477 | outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR); | |
478 | ||
479 | efr = inb(baseio + MOXA_MUST_EFR_REGISTER); | |
480 | efr &= ~MOXA_MUST_EFR_SF_RX_MASK; | |
481 | ||
482 | outb(efr, baseio + MOXA_MUST_EFR_REGISTER); | |
483 | outb(oldlcr, baseio + UART_LCR); | |
484 | } | |
485 | ||
486 | #ifdef CONFIG_PCI | |
487 | static int CheckIsMoxaMust(unsigned long io) | |
488 | { | |
489 | u8 oldmcr, hwid; | |
490 | int i; | |
491 | ||
492 | outb(0, io + UART_LCR); | |
493 | mxser_disable_must_enchance_mode(io); | |
494 | oldmcr = inb(io + UART_MCR); | |
495 | outb(0, io + UART_MCR); | |
496 | mxser_set_must_xon1_value(io, 0x11); | |
497 | if ((hwid = inb(io + UART_MCR)) != 0) { | |
498 | outb(oldmcr, io + UART_MCR); | |
499 | return MOXA_OTHER_UART; | |
500 | } | |
501 | ||
502 | mxser_get_must_hardware_id(io, &hwid); | |
503 | for (i = 1; i < UART_INFO_NUM; i++) { /* 0 = OTHER_UART */ | |
504 | if (hwid == Gpci_uart_info[i].type) | |
505 | return (int)hwid; | |
506 | } | |
507 | return MOXA_OTHER_UART; | |
508 | } | |
509 | #endif | |
510 | ||
511 | static void process_txrx_fifo(struct mxser_port *info) | |
512 | { | |
513 | int i; | |
514 | ||
515 | if ((info->type == PORT_16450) || (info->type == PORT_8250)) { | |
516 | info->rx_trigger = 1; | |
517 | info->rx_high_water = 1; | |
518 | info->rx_low_water = 1; | |
519 | info->xmit_fifo_size = 1; | |
520 | } else | |
521 | for (i = 0; i < UART_INFO_NUM; i++) | |
522 | if (info->board->chip_flag == Gpci_uart_info[i].type) { | |
523 | info->rx_trigger = Gpci_uart_info[i].rx_trigger; | |
524 | info->rx_low_water = Gpci_uart_info[i].rx_low_water; | |
525 | info->rx_high_water = Gpci_uart_info[i].rx_high_water; | |
526 | info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size; | |
527 | break; | |
528 | } | |
529 | } | |
530 | ||
531 | static unsigned char mxser_get_msr(int baseaddr, int mode, int port) | |
532 | { | |
533 | static unsigned char mxser_msr[MXSER_PORTS + 1]; | |
534 | unsigned char status = 0; | |
535 | ||
536 | status = inb(baseaddr + UART_MSR); | |
537 | ||
538 | mxser_msr[port] &= 0x0F; | |
539 | mxser_msr[port] |= status; | |
540 | status = mxser_msr[port]; | |
541 | if (mode) | |
542 | mxser_msr[port] = 0; | |
543 | ||
544 | return status; | |
545 | } | |
546 | ||
547 | static int mxser_carrier_raised(struct tty_port *port) | |
548 | { | |
549 | struct mxser_port *mp = container_of(port, struct mxser_port, port); | |
550 | return (inb(mp->ioaddr + UART_MSR) & UART_MSR_DCD)?1:0; | |
551 | } | |
552 | ||
553 | static void mxser_dtr_rts(struct tty_port *port, int on) | |
554 | { | |
555 | struct mxser_port *mp = container_of(port, struct mxser_port, port); | |
556 | unsigned long flags; | |
557 | ||
558 | spin_lock_irqsave(&mp->slock, flags); | |
559 | if (on) | |
560 | outb(inb(mp->ioaddr + UART_MCR) | | |
561 | UART_MCR_DTR | UART_MCR_RTS, mp->ioaddr + UART_MCR); | |
562 | else | |
563 | outb(inb(mp->ioaddr + UART_MCR)&~(UART_MCR_DTR | UART_MCR_RTS), | |
564 | mp->ioaddr + UART_MCR); | |
565 | spin_unlock_irqrestore(&mp->slock, flags); | |
566 | } | |
567 | ||
568 | static int mxser_set_baud(struct tty_struct *tty, long newspd) | |
569 | { | |
570 | struct mxser_port *info = tty->driver_data; | |
571 | unsigned int quot = 0, baud; | |
572 | unsigned char cval; | |
573 | u64 timeout; | |
574 | ||
575 | if (!info->ioaddr) | |
576 | return -1; | |
577 | ||
578 | if (newspd > info->max_baud) | |
579 | return -1; | |
580 | ||
581 | if (newspd == 134) { | |
582 | quot = 2 * info->baud_base / 269; | |
583 | tty_encode_baud_rate(tty, 134, 134); | |
584 | } else if (newspd) { | |
585 | quot = info->baud_base / newspd; | |
586 | if (quot == 0) | |
587 | quot = 1; | |
588 | baud = info->baud_base/quot; | |
589 | tty_encode_baud_rate(tty, baud, baud); | |
590 | } else { | |
591 | quot = 0; | |
592 | } | |
593 | ||
594 | /* | |
595 | * worst case (128 * 1000 * 10 * 18432) needs 35 bits, so divide in the | |
596 | * u64 domain | |
597 | */ | |
598 | timeout = (u64)info->xmit_fifo_size * HZ * 10 * quot; | |
599 | do_div(timeout, info->baud_base); | |
600 | info->timeout = timeout + HZ / 50; /* Add .02 seconds of slop */ | |
601 | ||
602 | if (quot) { | |
603 | info->MCR |= UART_MCR_DTR; | |
604 | outb(info->MCR, info->ioaddr + UART_MCR); | |
605 | } else { | |
606 | info->MCR &= ~UART_MCR_DTR; | |
607 | outb(info->MCR, info->ioaddr + UART_MCR); | |
608 | return 0; | |
609 | } | |
610 | ||
611 | cval = inb(info->ioaddr + UART_LCR); | |
612 | ||
613 | outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR); /* set DLAB */ | |
614 | ||
615 | outb(quot & 0xff, info->ioaddr + UART_DLL); /* LS of divisor */ | |
616 | outb(quot >> 8, info->ioaddr + UART_DLM); /* MS of divisor */ | |
617 | outb(cval, info->ioaddr + UART_LCR); /* reset DLAB */ | |
618 | ||
619 | #ifdef BOTHER | |
620 | if (C_BAUD(tty) == BOTHER) { | |
621 | quot = info->baud_base % newspd; | |
622 | quot *= 8; | |
623 | if (quot % newspd > newspd / 2) { | |
624 | quot /= newspd; | |
625 | quot++; | |
626 | } else | |
627 | quot /= newspd; | |
628 | ||
629 | mxser_set_must_enum_value(info->ioaddr, quot); | |
630 | } else | |
631 | #endif | |
632 | mxser_set_must_enum_value(info->ioaddr, 0); | |
633 | ||
634 | return 0; | |
635 | } | |
636 | ||
637 | /* | |
638 | * This routine is called to set the UART divisor registers to match | |
639 | * the specified baud rate for a serial port. | |
640 | */ | |
641 | static void mxser_change_speed(struct tty_struct *tty) | |
642 | { | |
643 | struct mxser_port *info = tty->driver_data; | |
644 | unsigned cflag, cval, fcr; | |
645 | unsigned char status; | |
646 | ||
647 | cflag = tty->termios.c_cflag; | |
648 | if (!info->ioaddr) | |
649 | return; | |
650 | ||
651 | if (mxser_set_baud_method[tty->index] == 0) | |
652 | mxser_set_baud(tty, tty_get_baud_rate(tty)); | |
653 | ||
654 | /* byte size and parity */ | |
655 | switch (cflag & CSIZE) { | |
656 | case CS5: | |
657 | cval = 0x00; | |
658 | break; | |
659 | case CS6: | |
660 | cval = 0x01; | |
661 | break; | |
662 | case CS7: | |
663 | cval = 0x02; | |
664 | break; | |
665 | case CS8: | |
666 | cval = 0x03; | |
667 | break; | |
668 | default: | |
669 | cval = 0x00; | |
670 | break; /* too keep GCC shut... */ | |
671 | } | |
672 | if (cflag & CSTOPB) | |
673 | cval |= 0x04; | |
674 | if (cflag & PARENB) | |
675 | cval |= UART_LCR_PARITY; | |
676 | if (!(cflag & PARODD)) | |
677 | cval |= UART_LCR_EPAR; | |
678 | if (cflag & CMSPAR) | |
679 | cval |= UART_LCR_SPAR; | |
680 | ||
681 | if ((info->type == PORT_8250) || (info->type == PORT_16450)) { | |
682 | if (info->board->chip_flag) { | |
683 | fcr = UART_FCR_ENABLE_FIFO; | |
684 | fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE; | |
685 | mxser_set_must_fifo_value(info); | |
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; | |
692 | mxser_set_must_fifo_value(info); | |
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 | } | |
708 | } | |
709 | } | |
710 | ||
711 | /* CTS flow control flag and modem status interrupts */ | |
712 | info->IER &= ~UART_IER_MSI; | |
713 | info->MCR &= ~UART_MCR_AFE; | |
714 | tty_port_set_cts_flow(&info->port, cflag & CRTSCTS); | |
715 | if (cflag & CRTSCTS) { | |
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); | |
721 | if (tty->hw_stopped) { | |
722 | if (status & UART_MSR_CTS) { | |
723 | tty->hw_stopped = 0; | |
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 | } | |
733 | tty_wakeup(tty); | |
734 | } | |
735 | } else { | |
736 | if (!(status & UART_MSR_CTS)) { | |
737 | tty->hw_stopped = 1; | |
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 | } | |
746 | } | |
747 | } | |
748 | outb(info->MCR, info->ioaddr + UART_MCR); | |
749 | tty_port_set_check_carrier(&info->port, ~cflag & CLOCAL); | |
750 | if (~cflag & CLOCAL) | |
751 | info->IER |= UART_IER_MSI; | |
752 | outb(info->IER, info->ioaddr + UART_IER); | |
753 | ||
754 | /* | |
755 | * Set up parity check flag | |
756 | */ | |
757 | info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR; | |
758 | if (I_INPCK(tty)) | |
759 | info->read_status_mask |= UART_LSR_FE | UART_LSR_PE; | |
760 | if (I_BRKINT(tty) || I_PARMRK(tty)) | |
761 | info->read_status_mask |= UART_LSR_BI; | |
762 | ||
763 | info->ignore_status_mask = 0; | |
764 | ||
765 | if (I_IGNBRK(tty)) { | |
766 | info->ignore_status_mask |= UART_LSR_BI; | |
767 | info->read_status_mask |= UART_LSR_BI; | |
768 | /* | |
769 | * If we're ignore parity and break indicators, ignore | |
770 | * overruns too. (For real raw support). | |
771 | */ | |
772 | if (I_IGNPAR(tty)) { | |
773 | info->ignore_status_mask |= | |
774 | UART_LSR_OE | | |
775 | UART_LSR_PE | | |
776 | UART_LSR_FE; | |
777 | info->read_status_mask |= | |
778 | UART_LSR_OE | | |
779 | UART_LSR_PE | | |
780 | UART_LSR_FE; | |
781 | } | |
782 | } | |
783 | if (info->board->chip_flag) { | |
784 | mxser_set_must_xon1_value(info->ioaddr, START_CHAR(tty)); | |
785 | mxser_set_must_xoff1_value(info->ioaddr, STOP_CHAR(tty)); | |
786 | if (I_IXON(tty)) { | |
787 | mxser_enable_must_rx_software_flow_control( | |
788 | info->ioaddr); | |
789 | } else { | |
790 | mxser_disable_must_rx_software_flow_control( | |
791 | info->ioaddr); | |
792 | } | |
793 | if (I_IXOFF(tty)) { | |
794 | mxser_enable_must_tx_software_flow_control( | |
795 | info->ioaddr); | |
796 | } else { | |
797 | mxser_disable_must_tx_software_flow_control( | |
798 | info->ioaddr); | |
799 | } | |
800 | } | |
801 | ||
802 | ||
803 | outb(fcr, info->ioaddr + UART_FCR); /* set fcr */ | |
804 | outb(cval, info->ioaddr + UART_LCR); | |
805 | } | |
806 | ||
807 | static void mxser_check_modem_status(struct tty_struct *tty, | |
808 | struct mxser_port *port, int status) | |
809 | { | |
810 | /* update input line counters */ | |
811 | if (status & UART_MSR_TERI) | |
812 | port->icount.rng++; | |
813 | if (status & UART_MSR_DDSR) | |
814 | port->icount.dsr++; | |
815 | if (status & UART_MSR_DDCD) | |
816 | port->icount.dcd++; | |
817 | if (status & UART_MSR_DCTS) | |
818 | port->icount.cts++; | |
819 | port->mon_data.modem_status = status; | |
820 | wake_up_interruptible(&port->port.delta_msr_wait); | |
821 | ||
822 | if (tty_port_check_carrier(&port->port) && (status & UART_MSR_DDCD)) { | |
823 | if (status & UART_MSR_DCD) | |
824 | wake_up_interruptible(&port->port.open_wait); | |
825 | } | |
826 | ||
827 | if (tty_port_cts_enabled(&port->port)) { | |
828 | if (tty->hw_stopped) { | |
829 | if (status & UART_MSR_CTS) { | |
830 | tty->hw_stopped = 0; | |
831 | ||
832 | if ((port->type != PORT_16550A) && | |
833 | (!port->board->chip_flag)) { | |
834 | outb(port->IER & ~UART_IER_THRI, | |
835 | port->ioaddr + UART_IER); | |
836 | port->IER |= UART_IER_THRI; | |
837 | outb(port->IER, port->ioaddr + | |
838 | UART_IER); | |
839 | } | |
840 | tty_wakeup(tty); | |
841 | } | |
842 | } else { | |
843 | if (!(status & UART_MSR_CTS)) { | |
844 | tty->hw_stopped = 1; | |
845 | if (port->type != PORT_16550A && | |
846 | !port->board->chip_flag) { | |
847 | port->IER &= ~UART_IER_THRI; | |
848 | outb(port->IER, port->ioaddr + | |
849 | UART_IER); | |
850 | } | |
851 | } | |
852 | } | |
853 | } | |
854 | } | |
855 | ||
856 | static int mxser_activate(struct tty_port *port, struct tty_struct *tty) | |
857 | { | |
858 | struct mxser_port *info = container_of(port, struct mxser_port, port); | |
859 | unsigned long page; | |
860 | unsigned long flags; | |
861 | ||
862 | page = __get_free_page(GFP_KERNEL); | |
863 | if (!page) | |
864 | return -ENOMEM; | |
865 | ||
866 | spin_lock_irqsave(&info->slock, flags); | |
867 | ||
868 | if (!info->ioaddr || !info->type) { | |
869 | set_bit(TTY_IO_ERROR, &tty->flags); | |
870 | free_page(page); | |
871 | spin_unlock_irqrestore(&info->slock, flags); | |
872 | return 0; | |
873 | } | |
874 | info->port.xmit_buf = (unsigned char *) page; | |
875 | ||
876 | /* | |
877 | * Clear the FIFO buffers and disable them | |
878 | * (they will be reenabled in mxser_change_speed()) | |
879 | */ | |
880 | if (info->board->chip_flag) | |
881 | outb((UART_FCR_CLEAR_RCVR | | |
882 | UART_FCR_CLEAR_XMIT | | |
883 | MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR); | |
884 | else | |
885 | outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT), | |
886 | info->ioaddr + UART_FCR); | |
887 | ||
888 | /* | |
889 | * At this point there's no way the LSR could still be 0xFF; | |
890 | * if it is, then bail out, because there's likely no UART | |
891 | * here. | |
892 | */ | |
893 | if (inb(info->ioaddr + UART_LSR) == 0xff) { | |
894 | spin_unlock_irqrestore(&info->slock, flags); | |
895 | if (capable(CAP_SYS_ADMIN)) { | |
896 | set_bit(TTY_IO_ERROR, &tty->flags); | |
897 | return 0; | |
898 | } else | |
899 | return -ENODEV; | |
900 | } | |
901 | ||
902 | /* | |
903 | * Clear the interrupt registers. | |
904 | */ | |
905 | (void) inb(info->ioaddr + UART_LSR); | |
906 | (void) inb(info->ioaddr + UART_RX); | |
907 | (void) inb(info->ioaddr + UART_IIR); | |
908 | (void) inb(info->ioaddr + UART_MSR); | |
909 | ||
910 | /* | |
911 | * Now, initialize the UART | |
912 | */ | |
913 | outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR); /* reset DLAB */ | |
914 | info->MCR = UART_MCR_DTR | UART_MCR_RTS; | |
915 | outb(info->MCR, info->ioaddr + UART_MCR); | |
916 | ||
917 | /* | |
918 | * Finally, enable interrupts | |
919 | */ | |
920 | info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI; | |
921 | ||
922 | if (info->board->chip_flag) | |
923 | info->IER |= MOXA_MUST_IER_EGDAI; | |
924 | outb(info->IER, info->ioaddr + UART_IER); /* enable interrupts */ | |
925 | ||
926 | /* | |
927 | * And clear the interrupt registers again for luck. | |
928 | */ | |
929 | (void) inb(info->ioaddr + UART_LSR); | |
930 | (void) inb(info->ioaddr + UART_RX); | |
931 | (void) inb(info->ioaddr + UART_IIR); | |
932 | (void) inb(info->ioaddr + UART_MSR); | |
933 | ||
934 | clear_bit(TTY_IO_ERROR, &tty->flags); | |
935 | info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; | |
936 | ||
937 | /* | |
938 | * and set the speed of the serial port | |
939 | */ | |
940 | mxser_change_speed(tty); | |
941 | spin_unlock_irqrestore(&info->slock, flags); | |
942 | ||
943 | return 0; | |
944 | } | |
945 | ||
946 | /* | |
947 | * This routine will shutdown a serial port | |
948 | */ | |
949 | static void mxser_shutdown_port(struct tty_port *port) | |
950 | { | |
951 | struct mxser_port *info = container_of(port, struct mxser_port, port); | |
952 | unsigned long flags; | |
953 | ||
954 | spin_lock_irqsave(&info->slock, flags); | |
955 | ||
956 | /* | |
957 | * clear delta_msr_wait queue to avoid mem leaks: we may free the irq | |
958 | * here so the queue might never be waken up | |
959 | */ | |
960 | wake_up_interruptible(&info->port.delta_msr_wait); | |
961 | ||
962 | /* | |
963 | * Free the xmit buffer, if necessary | |
964 | */ | |
965 | if (info->port.xmit_buf) { | |
966 | free_page((unsigned long) info->port.xmit_buf); | |
967 | info->port.xmit_buf = NULL; | |
968 | } | |
969 | ||
970 | info->IER = 0; | |
971 | outb(0x00, info->ioaddr + UART_IER); | |
972 | ||
973 | /* clear Rx/Tx FIFO's */ | |
974 | if (info->board->chip_flag) | |
975 | outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT | | |
976 | MOXA_MUST_FCR_GDA_MODE_ENABLE, | |
977 | info->ioaddr + UART_FCR); | |
978 | else | |
979 | outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT, | |
980 | info->ioaddr + UART_FCR); | |
981 | ||
982 | /* read data port to reset things */ | |
983 | (void) inb(info->ioaddr + UART_RX); | |
984 | ||
985 | ||
986 | if (info->board->chip_flag) | |
987 | SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr); | |
988 | ||
989 | spin_unlock_irqrestore(&info->slock, flags); | |
990 | } | |
991 | ||
992 | /* | |
993 | * This routine is called whenever a serial port is opened. It | |
994 | * enables interrupts for a serial port, linking in its async structure into | |
995 | * the IRQ chain. It also performs the serial-specific | |
996 | * initialization for the tty structure. | |
997 | */ | |
998 | static int mxser_open(struct tty_struct *tty, struct file *filp) | |
999 | { | |
1000 | struct mxser_port *info; | |
1001 | int line; | |
1002 | ||
1003 | line = tty->index; | |
1004 | if (line == MXSER_PORTS) | |
1005 | return 0; | |
1006 | info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD]; | |
1007 | if (!info->ioaddr) | |
1008 | return -ENODEV; | |
1009 | ||
1010 | tty->driver_data = info; | |
1011 | return tty_port_open(&info->port, tty, filp); | |
1012 | } | |
1013 | ||
1014 | static void mxser_flush_buffer(struct tty_struct *tty) | |
1015 | { | |
1016 | struct mxser_port *info = tty->driver_data; | |
1017 | char fcr; | |
1018 | unsigned long flags; | |
1019 | ||
1020 | ||
1021 | spin_lock_irqsave(&info->slock, flags); | |
1022 | info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; | |
1023 | ||
1024 | fcr = inb(info->ioaddr + UART_FCR); | |
1025 | outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT), | |
1026 | info->ioaddr + UART_FCR); | |
1027 | outb(fcr, info->ioaddr + UART_FCR); | |
1028 | ||
1029 | spin_unlock_irqrestore(&info->slock, flags); | |
1030 | ||
1031 | tty_wakeup(tty); | |
1032 | } | |
1033 | ||
1034 | ||
1035 | static void mxser_close_port(struct tty_port *port) | |
1036 | { | |
1037 | struct mxser_port *info = container_of(port, struct mxser_port, port); | |
1038 | unsigned long timeout; | |
1039 | /* | |
1040 | * At this point we stop accepting input. To do this, we | |
1041 | * disable the receive line status interrupts, and tell the | |
1042 | * interrupt driver to stop checking the data ready bit in the | |
1043 | * line status register. | |
1044 | */ | |
1045 | info->IER &= ~UART_IER_RLSI; | |
1046 | if (info->board->chip_flag) | |
1047 | info->IER &= ~MOXA_MUST_RECV_ISR; | |
1048 | ||
1049 | outb(info->IER, info->ioaddr + UART_IER); | |
1050 | /* | |
1051 | * Before we drop DTR, make sure the UART transmitter | |
1052 | * has completely drained; this is especially | |
1053 | * important if there is a transmit FIFO! | |
1054 | */ | |
1055 | timeout = jiffies + HZ; | |
1056 | while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) { | |
1057 | schedule_timeout_interruptible(5); | |
1058 | if (time_after(jiffies, timeout)) | |
1059 | break; | |
1060 | } | |
1061 | } | |
1062 | ||
1063 | /* | |
1064 | * This routine is called when the serial port gets closed. First, we | |
1065 | * wait for the last remaining data to be sent. Then, we unlink its | |
1066 | * async structure from the interrupt chain if necessary, and we free | |
1067 | * that IRQ if nothing is left in the chain. | |
1068 | */ | |
1069 | static void mxser_close(struct tty_struct *tty, struct file *filp) | |
1070 | { | |
1071 | struct mxser_port *info = tty->driver_data; | |
1072 | struct tty_port *port = &info->port; | |
1073 | ||
1074 | if (tty->index == MXSER_PORTS || info == NULL) | |
1075 | return; | |
1076 | if (tty_port_close_start(port, tty, filp) == 0) | |
1077 | return; | |
1078 | info->closing = 1; | |
1079 | mutex_lock(&port->mutex); | |
1080 | mxser_close_port(port); | |
1081 | mxser_flush_buffer(tty); | |
1082 | if (tty_port_initialized(port) && C_HUPCL(tty)) | |
1083 | tty_port_lower_dtr_rts(port); | |
1084 | mxser_shutdown_port(port); | |
1085 | tty_port_set_initialized(port, 0); | |
1086 | mutex_unlock(&port->mutex); | |
1087 | info->closing = 0; | |
1088 | /* Right now the tty_port set is done outside of the close_end helper | |
1089 | as we don't yet have everyone using refcounts */ | |
1090 | tty_port_close_end(port, tty); | |
1091 | tty_port_tty_set(port, NULL); | |
1092 | } | |
1093 | ||
1094 | static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count) | |
1095 | { | |
1096 | int c, total = 0; | |
1097 | struct mxser_port *info = tty->driver_data; | |
1098 | unsigned long flags; | |
1099 | ||
1100 | if (!info->port.xmit_buf) | |
1101 | return 0; | |
1102 | ||
1103 | while (1) { | |
1104 | c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1, | |
1105 | SERIAL_XMIT_SIZE - info->xmit_head)); | |
1106 | if (c <= 0) | |
1107 | break; | |
1108 | ||
1109 | memcpy(info->port.xmit_buf + info->xmit_head, buf, c); | |
1110 | spin_lock_irqsave(&info->slock, flags); | |
1111 | info->xmit_head = (info->xmit_head + c) & | |
1112 | (SERIAL_XMIT_SIZE - 1); | |
1113 | info->xmit_cnt += c; | |
1114 | spin_unlock_irqrestore(&info->slock, flags); | |
1115 | ||
1116 | buf += c; | |
1117 | count -= c; | |
1118 | total += c; | |
1119 | } | |
1120 | ||
1121 | if (info->xmit_cnt && !tty->stopped) { | |
1122 | if (!tty->hw_stopped || | |
1123 | (info->type == PORT_16550A) || | |
1124 | (info->board->chip_flag)) { | |
1125 | spin_lock_irqsave(&info->slock, flags); | |
1126 | outb(info->IER & ~UART_IER_THRI, info->ioaddr + | |
1127 | UART_IER); | |
1128 | info->IER |= UART_IER_THRI; | |
1129 | outb(info->IER, info->ioaddr + UART_IER); | |
1130 | spin_unlock_irqrestore(&info->slock, flags); | |
1131 | } | |
1132 | } | |
1133 | return total; | |
1134 | } | |
1135 | ||
1136 | static int mxser_put_char(struct tty_struct *tty, unsigned char ch) | |
1137 | { | |
1138 | struct mxser_port *info = tty->driver_data; | |
1139 | unsigned long flags; | |
1140 | ||
1141 | if (!info->port.xmit_buf) | |
1142 | return 0; | |
1143 | ||
1144 | if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1) | |
1145 | return 0; | |
1146 | ||
1147 | spin_lock_irqsave(&info->slock, flags); | |
1148 | info->port.xmit_buf[info->xmit_head++] = ch; | |
1149 | info->xmit_head &= SERIAL_XMIT_SIZE - 1; | |
1150 | info->xmit_cnt++; | |
1151 | spin_unlock_irqrestore(&info->slock, flags); | |
1152 | if (!tty->stopped) { | |
1153 | if (!tty->hw_stopped || | |
1154 | (info->type == PORT_16550A) || | |
1155 | info->board->chip_flag) { | |
1156 | spin_lock_irqsave(&info->slock, flags); | |
1157 | outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER); | |
1158 | info->IER |= UART_IER_THRI; | |
1159 | outb(info->IER, info->ioaddr + UART_IER); | |
1160 | spin_unlock_irqrestore(&info->slock, flags); | |
1161 | } | |
1162 | } | |
1163 | return 1; | |
1164 | } | |
1165 | ||
1166 | ||
1167 | static void mxser_flush_chars(struct tty_struct *tty) | |
1168 | { | |
1169 | struct mxser_port *info = tty->driver_data; | |
1170 | unsigned long flags; | |
1171 | ||
1172 | if (info->xmit_cnt <= 0 || tty->stopped || !info->port.xmit_buf || | |
1173 | (tty->hw_stopped && info->type != PORT_16550A && | |
1174 | !info->board->chip_flag)) | |
1175 | return; | |
1176 | ||
1177 | spin_lock_irqsave(&info->slock, flags); | |
1178 | ||
1179 | outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER); | |
1180 | info->IER |= UART_IER_THRI; | |
1181 | outb(info->IER, info->ioaddr + UART_IER); | |
1182 | ||
1183 | spin_unlock_irqrestore(&info->slock, flags); | |
1184 | } | |
1185 | ||
1186 | static int mxser_write_room(struct tty_struct *tty) | |
1187 | { | |
1188 | struct mxser_port *info = tty->driver_data; | |
1189 | int ret; | |
1190 | ||
1191 | ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1; | |
1192 | return ret < 0 ? 0 : ret; | |
1193 | } | |
1194 | ||
1195 | static int mxser_chars_in_buffer(struct tty_struct *tty) | |
1196 | { | |
1197 | struct mxser_port *info = tty->driver_data; | |
1198 | return info->xmit_cnt; | |
1199 | } | |
1200 | ||
1201 | /* | |
1202 | * ------------------------------------------------------------ | |
1203 | * friends of mxser_ioctl() | |
1204 | * ------------------------------------------------------------ | |
1205 | */ | |
1206 | static int mxser_get_serial_info(struct tty_struct *tty, | |
1207 | struct serial_struct *ss) | |
1208 | { | |
1209 | struct mxser_port *info = tty->driver_data; | |
1210 | struct tty_port *port = &info->port; | |
1211 | ||
1212 | if (tty->index == MXSER_PORTS) | |
1213 | return -ENOTTY; | |
1214 | ||
1215 | mutex_lock(&port->mutex); | |
1216 | ss->type = info->type, | |
1217 | ss->line = tty->index, | |
1218 | ss->port = info->ioaddr, | |
1219 | ss->irq = info->board->irq, | |
1220 | ss->flags = info->port.flags, | |
1221 | ss->baud_base = info->baud_base, | |
1222 | ss->close_delay = info->port.close_delay, | |
1223 | ss->closing_wait = info->port.closing_wait, | |
1224 | ss->custom_divisor = info->custom_divisor, | |
1225 | mutex_unlock(&port->mutex); | |
1226 | return 0; | |
1227 | } | |
1228 | ||
1229 | static int mxser_set_serial_info(struct tty_struct *tty, | |
1230 | struct serial_struct *ss) | |
1231 | { | |
1232 | struct mxser_port *info = tty->driver_data; | |
1233 | struct tty_port *port = &info->port; | |
1234 | speed_t baud; | |
1235 | unsigned long sl_flags; | |
1236 | unsigned int flags; | |
1237 | int retval = 0; | |
1238 | ||
1239 | if (tty->index == MXSER_PORTS) | |
1240 | return -ENOTTY; | |
1241 | if (tty_io_error(tty)) | |
1242 | return -EIO; | |
1243 | ||
1244 | mutex_lock(&port->mutex); | |
1245 | if (!info->ioaddr) { | |
1246 | mutex_unlock(&port->mutex); | |
1247 | return -ENODEV; | |
1248 | } | |
1249 | ||
1250 | if (ss->irq != info->board->irq || | |
1251 | ss->port != info->ioaddr) { | |
1252 | mutex_unlock(&port->mutex); | |
1253 | return -EINVAL; | |
1254 | } | |
1255 | ||
1256 | flags = port->flags & ASYNC_SPD_MASK; | |
1257 | ||
1258 | if (!capable(CAP_SYS_ADMIN)) { | |
1259 | if ((ss->baud_base != info->baud_base) || | |
1260 | (ss->close_delay != info->port.close_delay) || | |
1261 | ((ss->flags & ~ASYNC_USR_MASK) != (info->port.flags & ~ASYNC_USR_MASK))) { | |
1262 | mutex_unlock(&port->mutex); | |
1263 | return -EPERM; | |
1264 | } | |
1265 | info->port.flags = ((info->port.flags & ~ASYNC_USR_MASK) | | |
1266 | (ss->flags & ASYNC_USR_MASK)); | |
1267 | } else { | |
1268 | /* | |
1269 | * OK, past this point, all the error checking has been done. | |
1270 | * At this point, we start making changes..... | |
1271 | */ | |
1272 | port->flags = ((port->flags & ~ASYNC_FLAGS) | | |
1273 | (ss->flags & ASYNC_FLAGS)); | |
1274 | port->close_delay = ss->close_delay * HZ / 100; | |
1275 | port->closing_wait = ss->closing_wait * HZ / 100; | |
1276 | port->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0; | |
1277 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST && | |
1278 | (ss->baud_base != info->baud_base || | |
1279 | ss->custom_divisor != | |
1280 | info->custom_divisor)) { | |
1281 | if (ss->custom_divisor == 0) { | |
1282 | mutex_unlock(&port->mutex); | |
1283 | return -EINVAL; | |
1284 | } | |
1285 | baud = ss->baud_base / ss->custom_divisor; | |
1286 | tty_encode_baud_rate(tty, baud, baud); | |
1287 | } | |
1288 | } | |
1289 | ||
1290 | info->type = ss->type; | |
1291 | ||
1292 | process_txrx_fifo(info); | |
1293 | ||
1294 | if (tty_port_initialized(port)) { | |
1295 | if (flags != (port->flags & ASYNC_SPD_MASK)) { | |
1296 | spin_lock_irqsave(&info->slock, sl_flags); | |
1297 | mxser_change_speed(tty); | |
1298 | spin_unlock_irqrestore(&info->slock, sl_flags); | |
1299 | } | |
1300 | } else { | |
1301 | retval = mxser_activate(port, tty); | |
1302 | if (retval == 0) | |
1303 | tty_port_set_initialized(port, 1); | |
1304 | } | |
1305 | mutex_unlock(&port->mutex); | |
1306 | return retval; | |
1307 | } | |
1308 | ||
1309 | /* | |
1310 | * mxser_get_lsr_info - get line status register info | |
1311 | * | |
1312 | * Purpose: Let user call ioctl() to get info when the UART physically | |
1313 | * is emptied. On bus types like RS485, the transmitter must | |
1314 | * release the bus after transmitting. This must be done when | |
1315 | * the transmit shift register is empty, not be done when the | |
1316 | * transmit holding register is empty. This functionality | |
1317 | * allows an RS485 driver to be written in user space. | |
1318 | */ | |
1319 | static int mxser_get_lsr_info(struct mxser_port *info, | |
1320 | unsigned int __user *value) | |
1321 | { | |
1322 | unsigned char status; | |
1323 | unsigned int result; | |
1324 | unsigned long flags; | |
1325 | ||
1326 | spin_lock_irqsave(&info->slock, flags); | |
1327 | status = inb(info->ioaddr + UART_LSR); | |
1328 | spin_unlock_irqrestore(&info->slock, flags); | |
1329 | result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0); | |
1330 | return put_user(result, value); | |
1331 | } | |
1332 | ||
1333 | static int mxser_tiocmget(struct tty_struct *tty) | |
1334 | { | |
1335 | struct mxser_port *info = tty->driver_data; | |
1336 | unsigned char control, status; | |
1337 | unsigned long flags; | |
1338 | ||
1339 | ||
1340 | if (tty->index == MXSER_PORTS) | |
1341 | return -ENOIOCTLCMD; | |
1342 | if (tty_io_error(tty)) | |
1343 | return -EIO; | |
1344 | ||
1345 | control = info->MCR; | |
1346 | ||
1347 | spin_lock_irqsave(&info->slock, flags); | |
1348 | status = inb(info->ioaddr + UART_MSR); | |
1349 | if (status & UART_MSR_ANY_DELTA) | |
1350 | mxser_check_modem_status(tty, info, status); | |
1351 | spin_unlock_irqrestore(&info->slock, flags); | |
1352 | return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) | | |
1353 | ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) | | |
1354 | ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) | | |
1355 | ((status & UART_MSR_RI) ? TIOCM_RNG : 0) | | |
1356 | ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) | | |
1357 | ((status & UART_MSR_CTS) ? TIOCM_CTS : 0); | |
1358 | } | |
1359 | ||
1360 | static int mxser_tiocmset(struct tty_struct *tty, | |
1361 | unsigned int set, unsigned int clear) | |
1362 | { | |
1363 | struct mxser_port *info = tty->driver_data; | |
1364 | unsigned long flags; | |
1365 | ||
1366 | ||
1367 | if (tty->index == MXSER_PORTS) | |
1368 | return -ENOIOCTLCMD; | |
1369 | if (tty_io_error(tty)) | |
1370 | return -EIO; | |
1371 | ||
1372 | spin_lock_irqsave(&info->slock, flags); | |
1373 | ||
1374 | if (set & TIOCM_RTS) | |
1375 | info->MCR |= UART_MCR_RTS; | |
1376 | if (set & TIOCM_DTR) | |
1377 | info->MCR |= UART_MCR_DTR; | |
1378 | ||
1379 | if (clear & TIOCM_RTS) | |
1380 | info->MCR &= ~UART_MCR_RTS; | |
1381 | if (clear & TIOCM_DTR) | |
1382 | info->MCR &= ~UART_MCR_DTR; | |
1383 | ||
1384 | outb(info->MCR, info->ioaddr + UART_MCR); | |
1385 | spin_unlock_irqrestore(&info->slock, flags); | |
1386 | return 0; | |
1387 | } | |
1388 | ||
1389 | static int __init mxser_program_mode(int port) | |
1390 | { | |
1391 | int id, i, j, n; | |
1392 | ||
1393 | outb(0, port); | |
1394 | outb(0, port); | |
1395 | outb(0, port); | |
1396 | (void)inb(port); | |
1397 | (void)inb(port); | |
1398 | outb(0, port); | |
1399 | (void)inb(port); | |
1400 | ||
1401 | id = inb(port + 1) & 0x1F; | |
1402 | if ((id != C168_ASIC_ID) && | |
1403 | (id != C104_ASIC_ID) && | |
1404 | (id != C102_ASIC_ID) && | |
1405 | (id != CI132_ASIC_ID) && | |
1406 | (id != CI134_ASIC_ID) && | |
1407 | (id != CI104J_ASIC_ID)) | |
1408 | return -1; | |
1409 | for (i = 0, j = 0; i < 4; i++) { | |
1410 | n = inb(port + 2); | |
1411 | if (n == 'M') { | |
1412 | j = 1; | |
1413 | } else if ((j == 1) && (n == 1)) { | |
1414 | j = 2; | |
1415 | break; | |
1416 | } else | |
1417 | j = 0; | |
1418 | } | |
1419 | if (j != 2) | |
1420 | id = -2; | |
1421 | return id; | |
1422 | } | |
1423 | ||
1424 | static void __init mxser_normal_mode(int port) | |
1425 | { | |
1426 | int i, n; | |
1427 | ||
1428 | outb(0xA5, port + 1); | |
1429 | outb(0x80, port + 3); | |
1430 | outb(12, port + 0); /* 9600 bps */ | |
1431 | outb(0, port + 1); | |
1432 | outb(0x03, port + 3); /* 8 data bits */ | |
1433 | outb(0x13, port + 4); /* loop back mode */ | |
1434 | for (i = 0; i < 16; i++) { | |
1435 | n = inb(port + 5); | |
1436 | if ((n & 0x61) == 0x60) | |
1437 | break; | |
1438 | if ((n & 1) == 1) | |
1439 | (void)inb(port); | |
1440 | } | |
1441 | outb(0x00, port + 4); | |
1442 | } | |
1443 | ||
1444 | #define CHIP_SK 0x01 /* Serial Data Clock in Eprom */ | |
1445 | #define CHIP_DO 0x02 /* Serial Data Output in Eprom */ | |
1446 | #define CHIP_CS 0x04 /* Serial Chip Select in Eprom */ | |
1447 | #define CHIP_DI 0x08 /* Serial Data Input in Eprom */ | |
1448 | #define EN_CCMD 0x000 /* Chip's command register */ | |
1449 | #define EN0_RSARLO 0x008 /* Remote start address reg 0 */ | |
1450 | #define EN0_RSARHI 0x009 /* Remote start address reg 1 */ | |
1451 | #define EN0_RCNTLO 0x00A /* Remote byte count reg WR */ | |
1452 | #define EN0_RCNTHI 0x00B /* Remote byte count reg WR */ | |
1453 | #define EN0_DCFG 0x00E /* Data configuration reg WR */ | |
1454 | #define EN0_PORT 0x010 /* Rcv missed frame error counter RD */ | |
1455 | #define ENC_PAGE0 0x000 /* Select page 0 of chip registers */ | |
1456 | #define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */ | |
1457 | static int __init mxser_read_register(int port, unsigned short *regs) | |
1458 | { | |
1459 | int i, k, value, id; | |
1460 | unsigned int j; | |
1461 | ||
1462 | id = mxser_program_mode(port); | |
1463 | if (id < 0) | |
1464 | return id; | |
1465 | for (i = 0; i < 14; i++) { | |
1466 | k = (i & 0x3F) | 0x180; | |
1467 | for (j = 0x100; j > 0; j >>= 1) { | |
1468 | outb(CHIP_CS, port); | |
1469 | if (k & j) { | |
1470 | outb(CHIP_CS | CHIP_DO, port); | |
1471 | outb(CHIP_CS | CHIP_DO | CHIP_SK, port); /* A? bit of read */ | |
1472 | } else { | |
1473 | outb(CHIP_CS, port); | |
1474 | outb(CHIP_CS | CHIP_SK, port); /* A? bit of read */ | |
1475 | } | |
1476 | } | |
1477 | (void)inb(port); | |
1478 | value = 0; | |
1479 | for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) { | |
1480 | outb(CHIP_CS, port); | |
1481 | outb(CHIP_CS | CHIP_SK, port); | |
1482 | if (inb(port) & CHIP_DI) | |
1483 | value |= j; | |
1484 | } | |
1485 | regs[i] = value; | |
1486 | outb(0, port); | |
1487 | } | |
1488 | mxser_normal_mode(port); | |
1489 | return id; | |
1490 | } | |
1491 | ||
1492 | static int mxser_ioctl_special(unsigned int cmd, void __user *argp) | |
1493 | { | |
1494 | struct mxser_port *ip; | |
1495 | struct tty_port *port; | |
1496 | struct tty_struct *tty; | |
1497 | int result, status; | |
1498 | unsigned int i, j; | |
1499 | int ret = 0; | |
1500 | ||
1501 | switch (cmd) { | |
1502 | case MOXA_GET_MAJOR: | |
1503 | printk_ratelimited(KERN_WARNING "mxser: '%s' uses deprecated ioctl " | |
1504 | "%x (GET_MAJOR), fix your userspace\n", | |
1505 | current->comm, cmd); | |
1506 | return put_user(ttymajor, (int __user *)argp); | |
1507 | ||
1508 | case MOXA_CHKPORTENABLE: | |
1509 | result = 0; | |
1510 | for (i = 0; i < MXSER_BOARDS; i++) | |
1511 | for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) | |
1512 | if (mxser_boards[i].ports[j].ioaddr) | |
1513 | result |= (1 << i); | |
1514 | return put_user(result, (unsigned long __user *)argp); | |
1515 | case MOXA_GETDATACOUNT: | |
1516 | /* The receive side is locked by port->slock but it isn't | |
1517 | clear that an exact snapshot is worth copying here */ | |
1518 | if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log))) | |
1519 | ret = -EFAULT; | |
1520 | return ret; | |
1521 | case MOXA_GETMSTATUS: { | |
1522 | struct mxser_mstatus ms, __user *msu = argp; | |
1523 | for (i = 0; i < MXSER_BOARDS; i++) | |
1524 | for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) { | |
1525 | ip = &mxser_boards[i].ports[j]; | |
1526 | port = &ip->port; | |
1527 | memset(&ms, 0, sizeof(ms)); | |
1528 | ||
1529 | mutex_lock(&port->mutex); | |
1530 | if (!ip->ioaddr) | |
1531 | goto copy; | |
1532 | ||
1533 | tty = tty_port_tty_get(port); | |
1534 | ||
1535 | if (!tty) | |
1536 | ms.cflag = ip->normal_termios.c_cflag; | |
1537 | else | |
1538 | ms.cflag = tty->termios.c_cflag; | |
1539 | tty_kref_put(tty); | |
1540 | spin_lock_irq(&ip->slock); | |
1541 | status = inb(ip->ioaddr + UART_MSR); | |
1542 | spin_unlock_irq(&ip->slock); | |
1543 | if (status & UART_MSR_DCD) | |
1544 | ms.dcd = 1; | |
1545 | if (status & UART_MSR_DSR) | |
1546 | ms.dsr = 1; | |
1547 | if (status & UART_MSR_CTS) | |
1548 | ms.cts = 1; | |
1549 | copy: | |
1550 | mutex_unlock(&port->mutex); | |
1551 | if (copy_to_user(msu, &ms, sizeof(ms))) | |
1552 | return -EFAULT; | |
1553 | msu++; | |
1554 | } | |
1555 | return 0; | |
1556 | } | |
1557 | case MOXA_ASPP_MON_EXT: { | |
1558 | struct mxser_mon_ext *me; /* it's 2k, stack unfriendly */ | |
1559 | unsigned int cflag, iflag, p; | |
1560 | u8 opmode; | |
1561 | ||
1562 | me = kzalloc(sizeof(*me), GFP_KERNEL); | |
1563 | if (!me) | |
1564 | return -ENOMEM; | |
1565 | ||
1566 | for (i = 0, p = 0; i < MXSER_BOARDS; i++) { | |
1567 | for (j = 0; j < MXSER_PORTS_PER_BOARD; j++, p++) { | |
1568 | if (p >= ARRAY_SIZE(me->rx_cnt)) { | |
1569 | i = MXSER_BOARDS; | |
1570 | break; | |
1571 | } | |
1572 | ip = &mxser_boards[i].ports[j]; | |
1573 | port = &ip->port; | |
1574 | ||
1575 | mutex_lock(&port->mutex); | |
1576 | if (!ip->ioaddr) { | |
1577 | mutex_unlock(&port->mutex); | |
1578 | continue; | |
1579 | } | |
1580 | ||
1581 | spin_lock_irq(&ip->slock); | |
1582 | status = mxser_get_msr(ip->ioaddr, 0, p); | |
1583 | ||
1584 | if (status & UART_MSR_TERI) | |
1585 | ip->icount.rng++; | |
1586 | if (status & UART_MSR_DDSR) | |
1587 | ip->icount.dsr++; | |
1588 | if (status & UART_MSR_DDCD) | |
1589 | ip->icount.dcd++; | |
1590 | if (status & UART_MSR_DCTS) | |
1591 | ip->icount.cts++; | |
1592 | ||
1593 | ip->mon_data.modem_status = status; | |
1594 | me->rx_cnt[p] = ip->mon_data.rxcnt; | |
1595 | me->tx_cnt[p] = ip->mon_data.txcnt; | |
1596 | me->up_rxcnt[p] = ip->mon_data.up_rxcnt; | |
1597 | me->up_txcnt[p] = ip->mon_data.up_txcnt; | |
1598 | me->modem_status[p] = | |
1599 | ip->mon_data.modem_status; | |
1600 | spin_unlock_irq(&ip->slock); | |
1601 | ||
1602 | tty = tty_port_tty_get(&ip->port); | |
1603 | ||
1604 | if (!tty) { | |
1605 | cflag = ip->normal_termios.c_cflag; | |
1606 | iflag = ip->normal_termios.c_iflag; | |
1607 | me->baudrate[p] = tty_termios_baud_rate(&ip->normal_termios); | |
1608 | } else { | |
1609 | cflag = tty->termios.c_cflag; | |
1610 | iflag = tty->termios.c_iflag; | |
1611 | me->baudrate[p] = tty_get_baud_rate(tty); | |
1612 | } | |
1613 | tty_kref_put(tty); | |
1614 | ||
1615 | me->databits[p] = cflag & CSIZE; | |
1616 | me->stopbits[p] = cflag & CSTOPB; | |
1617 | me->parity[p] = cflag & (PARENB | PARODD | | |
1618 | CMSPAR); | |
1619 | ||
1620 | if (cflag & CRTSCTS) | |
1621 | me->flowctrl[p] |= 0x03; | |
1622 | ||
1623 | if (iflag & (IXON | IXOFF)) | |
1624 | me->flowctrl[p] |= 0x0C; | |
1625 | ||
1626 | if (ip->type == PORT_16550A) | |
1627 | me->fifo[p] = 1; | |
1628 | ||
1629 | if (ip->board->chip_flag == MOXA_MUST_MU860_HWID) { | |
1630 | opmode = inb(ip->opmode_ioaddr)>>((p % 4) * 2); | |
1631 | opmode &= OP_MODE_MASK; | |
1632 | } else { | |
1633 | opmode = RS232_MODE; | |
1634 | } | |
1635 | me->iftype[p] = opmode; | |
1636 | mutex_unlock(&port->mutex); | |
1637 | } | |
1638 | } | |
1639 | if (copy_to_user(argp, me, sizeof(*me))) | |
1640 | ret = -EFAULT; | |
1641 | kfree(me); | |
1642 | return ret; | |
1643 | } | |
1644 | default: | |
1645 | return -ENOIOCTLCMD; | |
1646 | } | |
1647 | return 0; | |
1648 | } | |
1649 | ||
1650 | static int mxser_cflags_changed(struct mxser_port *info, unsigned long arg, | |
1651 | struct async_icount *cprev) | |
1652 | { | |
1653 | struct async_icount cnow; | |
1654 | unsigned long flags; | |
1655 | int ret; | |
1656 | ||
1657 | spin_lock_irqsave(&info->slock, flags); | |
1658 | cnow = info->icount; /* atomic copy */ | |
1659 | spin_unlock_irqrestore(&info->slock, flags); | |
1660 | ||
1661 | ret = ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) || | |
1662 | ((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) || | |
1663 | ((arg & TIOCM_CD) && (cnow.dcd != cprev->dcd)) || | |
1664 | ((arg & TIOCM_CTS) && (cnow.cts != cprev->cts)); | |
1665 | ||
1666 | *cprev = cnow; | |
1667 | ||
1668 | return ret; | |
1669 | } | |
1670 | ||
1671 | static int mxser_ioctl(struct tty_struct *tty, | |
1672 | unsigned int cmd, unsigned long arg) | |
1673 | { | |
1674 | struct mxser_port *info = tty->driver_data; | |
1675 | struct async_icount cnow; | |
1676 | unsigned long flags; | |
1677 | void __user *argp = (void __user *)arg; | |
1678 | ||
1679 | if (tty->index == MXSER_PORTS) | |
1680 | return mxser_ioctl_special(cmd, argp); | |
1681 | ||
1682 | if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) { | |
1683 | int p; | |
1684 | unsigned long opmode; | |
1685 | static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f }; | |
1686 | int shiftbit; | |
1687 | unsigned char val, mask; | |
1688 | ||
1689 | if (info->board->chip_flag != MOXA_MUST_MU860_HWID) | |
1690 | return -EFAULT; | |
1691 | ||
1692 | p = tty->index % 4; | |
1693 | if (cmd == MOXA_SET_OP_MODE) { | |
1694 | if (get_user(opmode, (int __user *) argp)) | |
1695 | return -EFAULT; | |
1696 | if (opmode != RS232_MODE && | |
1697 | opmode != RS485_2WIRE_MODE && | |
1698 | opmode != RS422_MODE && | |
1699 | opmode != RS485_4WIRE_MODE) | |
1700 | return -EFAULT; | |
1701 | mask = ModeMask[p]; | |
1702 | shiftbit = p * 2; | |
1703 | spin_lock_irq(&info->slock); | |
1704 | val = inb(info->opmode_ioaddr); | |
1705 | val &= mask; | |
1706 | val |= (opmode << shiftbit); | |
1707 | outb(val, info->opmode_ioaddr); | |
1708 | spin_unlock_irq(&info->slock); | |
1709 | } else { | |
1710 | shiftbit = p * 2; | |
1711 | spin_lock_irq(&info->slock); | |
1712 | opmode = inb(info->opmode_ioaddr) >> shiftbit; | |
1713 | spin_unlock_irq(&info->slock); | |
1714 | opmode &= OP_MODE_MASK; | |
1715 | if (put_user(opmode, (int __user *)argp)) | |
1716 | return -EFAULT; | |
1717 | } | |
1718 | return 0; | |
1719 | } | |
1720 | ||
1721 | if (cmd != TIOCMIWAIT && tty_io_error(tty)) | |
1722 | return -EIO; | |
1723 | ||
1724 | switch (cmd) { | |
1725 | case TIOCSERGETLSR: /* Get line status register */ | |
1726 | return mxser_get_lsr_info(info, argp); | |
1727 | /* | |
1728 | * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change | |
1729 | * - mask passed in arg for lines of interest | |
1730 | * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) | |
1731 | * Caller should use TIOCGICOUNT to see which one it was | |
1732 | */ | |
1733 | case TIOCMIWAIT: | |
1734 | spin_lock_irqsave(&info->slock, flags); | |
1735 | cnow = info->icount; /* note the counters on entry */ | |
1736 | spin_unlock_irqrestore(&info->slock, flags); | |
1737 | ||
1738 | return wait_event_interruptible(info->port.delta_msr_wait, | |
1739 | mxser_cflags_changed(info, arg, &cnow)); | |
1740 | case MOXA_HighSpeedOn: | |
1741 | return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp); | |
1742 | case MOXA_SDS_RSTICOUNTER: | |
1743 | spin_lock_irq(&info->slock); | |
1744 | info->mon_data.rxcnt = 0; | |
1745 | info->mon_data.txcnt = 0; | |
1746 | spin_unlock_irq(&info->slock); | |
1747 | return 0; | |
1748 | ||
1749 | case MOXA_ASPP_OQUEUE:{ | |
1750 | int len, lsr; | |
1751 | ||
1752 | len = mxser_chars_in_buffer(tty); | |
1753 | spin_lock_irq(&info->slock); | |
1754 | lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_THRE; | |
1755 | spin_unlock_irq(&info->slock); | |
1756 | len += (lsr ? 0 : 1); | |
1757 | ||
1758 | return put_user(len, (int __user *)argp); | |
1759 | } | |
1760 | case MOXA_ASPP_MON: { | |
1761 | int mcr, status; | |
1762 | ||
1763 | spin_lock_irq(&info->slock); | |
1764 | status = mxser_get_msr(info->ioaddr, 1, tty->index); | |
1765 | mxser_check_modem_status(tty, info, status); | |
1766 | ||
1767 | mcr = inb(info->ioaddr + UART_MCR); | |
1768 | spin_unlock_irq(&info->slock); | |
1769 | ||
1770 | if (mcr & MOXA_MUST_MCR_XON_FLAG) | |
1771 | info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD; | |
1772 | else | |
1773 | info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD; | |
1774 | ||
1775 | if (mcr & MOXA_MUST_MCR_TX_XON) | |
1776 | info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT; | |
1777 | else | |
1778 | info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT; | |
1779 | ||
1780 | if (tty->hw_stopped) | |
1781 | info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD; | |
1782 | else | |
1783 | info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD; | |
1784 | ||
1785 | if (copy_to_user(argp, &info->mon_data, | |
1786 | sizeof(struct mxser_mon))) | |
1787 | return -EFAULT; | |
1788 | ||
1789 | return 0; | |
1790 | } | |
1791 | case MOXA_ASPP_LSTATUS: { | |
1792 | if (put_user(info->err_shadow, (unsigned char __user *)argp)) | |
1793 | return -EFAULT; | |
1794 | ||
1795 | info->err_shadow = 0; | |
1796 | return 0; | |
1797 | } | |
1798 | case MOXA_SET_BAUD_METHOD: { | |
1799 | int method; | |
1800 | ||
1801 | if (get_user(method, (int __user *)argp)) | |
1802 | return -EFAULT; | |
1803 | mxser_set_baud_method[tty->index] = method; | |
1804 | return put_user(method, (int __user *)argp); | |
1805 | } | |
1806 | default: | |
1807 | return -ENOIOCTLCMD; | |
1808 | } | |
1809 | return 0; | |
1810 | } | |
1811 | ||
1812 | /* | |
1813 | * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) | |
1814 | * Return: write counters to the user passed counter struct | |
1815 | * NB: both 1->0 and 0->1 transitions are counted except for | |
1816 | * RI where only 0->1 is counted. | |
1817 | */ | |
1818 | ||
1819 | static int mxser_get_icount(struct tty_struct *tty, | |
1820 | struct serial_icounter_struct *icount) | |
1821 | ||
1822 | { | |
1823 | struct mxser_port *info = tty->driver_data; | |
1824 | struct async_icount cnow; | |
1825 | unsigned long flags; | |
1826 | ||
1827 | spin_lock_irqsave(&info->slock, flags); | |
1828 | cnow = info->icount; | |
1829 | spin_unlock_irqrestore(&info->slock, flags); | |
1830 | ||
1831 | icount->frame = cnow.frame; | |
1832 | icount->brk = cnow.brk; | |
1833 | icount->overrun = cnow.overrun; | |
1834 | icount->buf_overrun = cnow.buf_overrun; | |
1835 | icount->parity = cnow.parity; | |
1836 | icount->rx = cnow.rx; | |
1837 | icount->tx = cnow.tx; | |
1838 | icount->cts = cnow.cts; | |
1839 | icount->dsr = cnow.dsr; | |
1840 | icount->rng = cnow.rng; | |
1841 | icount->dcd = cnow.dcd; | |
1842 | return 0; | |
1843 | } | |
1844 | ||
1845 | static void mxser_stoprx(struct tty_struct *tty) | |
1846 | { | |
1847 | struct mxser_port *info = tty->driver_data; | |
1848 | ||
1849 | info->ldisc_stop_rx = 1; | |
1850 | if (I_IXOFF(tty)) { | |
1851 | if (info->board->chip_flag) { | |
1852 | info->IER &= ~MOXA_MUST_RECV_ISR; | |
1853 | outb(info->IER, info->ioaddr + UART_IER); | |
1854 | } else { | |
1855 | info->x_char = STOP_CHAR(tty); | |
1856 | outb(0, info->ioaddr + UART_IER); | |
1857 | info->IER |= UART_IER_THRI; | |
1858 | outb(info->IER, info->ioaddr + UART_IER); | |
1859 | } | |
1860 | } | |
1861 | ||
1862 | if (C_CRTSCTS(tty)) { | |
1863 | info->MCR &= ~UART_MCR_RTS; | |
1864 | outb(info->MCR, info->ioaddr + UART_MCR); | |
1865 | } | |
1866 | } | |
1867 | ||
1868 | /* | |
1869 | * This routine is called by the upper-layer tty layer to signal that | |
1870 | * incoming characters should be throttled. | |
1871 | */ | |
1872 | static void mxser_throttle(struct tty_struct *tty) | |
1873 | { | |
1874 | mxser_stoprx(tty); | |
1875 | } | |
1876 | ||
1877 | static void mxser_unthrottle(struct tty_struct *tty) | |
1878 | { | |
1879 | struct mxser_port *info = tty->driver_data; | |
1880 | ||
1881 | /* startrx */ | |
1882 | info->ldisc_stop_rx = 0; | |
1883 | if (I_IXOFF(tty)) { | |
1884 | if (info->x_char) | |
1885 | info->x_char = 0; | |
1886 | else { | |
1887 | if (info->board->chip_flag) { | |
1888 | info->IER |= MOXA_MUST_RECV_ISR; | |
1889 | outb(info->IER, info->ioaddr + UART_IER); | |
1890 | } else { | |
1891 | info->x_char = START_CHAR(tty); | |
1892 | outb(0, info->ioaddr + UART_IER); | |
1893 | info->IER |= UART_IER_THRI; | |
1894 | outb(info->IER, info->ioaddr + UART_IER); | |
1895 | } | |
1896 | } | |
1897 | } | |
1898 | ||
1899 | if (C_CRTSCTS(tty)) { | |
1900 | info->MCR |= UART_MCR_RTS; | |
1901 | outb(info->MCR, info->ioaddr + UART_MCR); | |
1902 | } | |
1903 | } | |
1904 | ||
1905 | /* | |
1906 | * mxser_stop() and mxser_start() | |
1907 | * | |
1908 | * This routines are called before setting or resetting tty->stopped. | |
1909 | * They enable or disable transmitter interrupts, as necessary. | |
1910 | */ | |
1911 | static void mxser_stop(struct tty_struct *tty) | |
1912 | { | |
1913 | struct mxser_port *info = tty->driver_data; | |
1914 | unsigned long flags; | |
1915 | ||
1916 | spin_lock_irqsave(&info->slock, flags); | |
1917 | if (info->IER & UART_IER_THRI) { | |
1918 | info->IER &= ~UART_IER_THRI; | |
1919 | outb(info->IER, info->ioaddr + UART_IER); | |
1920 | } | |
1921 | spin_unlock_irqrestore(&info->slock, flags); | |
1922 | } | |
1923 | ||
1924 | static void mxser_start(struct tty_struct *tty) | |
1925 | { | |
1926 | struct mxser_port *info = tty->driver_data; | |
1927 | unsigned long flags; | |
1928 | ||
1929 | spin_lock_irqsave(&info->slock, flags); | |
1930 | if (info->xmit_cnt && info->port.xmit_buf) { | |
1931 | outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER); | |
1932 | info->IER |= UART_IER_THRI; | |
1933 | outb(info->IER, info->ioaddr + UART_IER); | |
1934 | } | |
1935 | spin_unlock_irqrestore(&info->slock, flags); | |
1936 | } | |
1937 | ||
1938 | static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios) | |
1939 | { | |
1940 | struct mxser_port *info = tty->driver_data; | |
1941 | unsigned long flags; | |
1942 | ||
1943 | spin_lock_irqsave(&info->slock, flags); | |
1944 | mxser_change_speed(tty); | |
1945 | spin_unlock_irqrestore(&info->slock, flags); | |
1946 | ||
1947 | if ((old_termios->c_cflag & CRTSCTS) && !C_CRTSCTS(tty)) { | |
1948 | tty->hw_stopped = 0; | |
1949 | mxser_start(tty); | |
1950 | } | |
1951 | ||
1952 | /* Handle sw stopped */ | |
1953 | if ((old_termios->c_iflag & IXON) && !I_IXON(tty)) { | |
1954 | tty->stopped = 0; | |
1955 | ||
1956 | if (info->board->chip_flag) { | |
1957 | spin_lock_irqsave(&info->slock, flags); | |
1958 | mxser_disable_must_rx_software_flow_control( | |
1959 | info->ioaddr); | |
1960 | spin_unlock_irqrestore(&info->slock, flags); | |
1961 | } | |
1962 | ||
1963 | mxser_start(tty); | |
1964 | } | |
1965 | } | |
1966 | ||
1967 | /* | |
1968 | * mxser_wait_until_sent() --- wait until the transmitter is empty | |
1969 | */ | |
1970 | static void mxser_wait_until_sent(struct tty_struct *tty, int timeout) | |
1971 | { | |
1972 | struct mxser_port *info = tty->driver_data; | |
1973 | unsigned long orig_jiffies, char_time; | |
1974 | unsigned long flags; | |
1975 | int lsr; | |
1976 | ||
1977 | if (info->type == PORT_UNKNOWN) | |
1978 | return; | |
1979 | ||
1980 | if (info->xmit_fifo_size == 0) | |
1981 | return; /* Just in case.... */ | |
1982 | ||
1983 | orig_jiffies = jiffies; | |
1984 | /* | |
1985 | * Set the check interval to be 1/5 of the estimated time to | |
1986 | * send a single character, and make it at least 1. The check | |
1987 | * interval should also be less than the timeout. | |
1988 | * | |
1989 | * Note: we have to use pretty tight timings here to satisfy | |
1990 | * the NIST-PCTS. | |
1991 | */ | |
1992 | char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size; | |
1993 | char_time = char_time / 5; | |
1994 | if (char_time == 0) | |
1995 | char_time = 1; | |
1996 | if (timeout && timeout < char_time) | |
1997 | char_time = timeout; | |
1998 | /* | |
1999 | * If the transmitter hasn't cleared in twice the approximate | |
2000 | * amount of time to send the entire FIFO, it probably won't | |
2001 | * ever clear. This assumes the UART isn't doing flow | |
2002 | * control, which is currently the case. Hence, if it ever | |
2003 | * takes longer than info->timeout, this is probably due to a | |
2004 | * UART bug of some kind. So, we clamp the timeout parameter at | |
2005 | * 2*info->timeout. | |
2006 | */ | |
2007 | if (!timeout || timeout > 2 * info->timeout) | |
2008 | timeout = 2 * info->timeout; | |
2009 | ||
2010 | spin_lock_irqsave(&info->slock, flags); | |
2011 | while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) { | |
2012 | spin_unlock_irqrestore(&info->slock, flags); | |
2013 | schedule_timeout_interruptible(char_time); | |
2014 | spin_lock_irqsave(&info->slock, flags); | |
2015 | if (signal_pending(current)) | |
2016 | break; | |
2017 | if (timeout && time_after(jiffies, orig_jiffies + timeout)) | |
2018 | break; | |
2019 | } | |
2020 | spin_unlock_irqrestore(&info->slock, flags); | |
2021 | set_current_state(TASK_RUNNING); | |
2022 | } | |
2023 | ||
2024 | /* | |
2025 | * This routine is called by tty_hangup() when a hangup is signaled. | |
2026 | */ | |
2027 | static void mxser_hangup(struct tty_struct *tty) | |
2028 | { | |
2029 | struct mxser_port *info = tty->driver_data; | |
2030 | ||
2031 | mxser_flush_buffer(tty); | |
2032 | tty_port_hangup(&info->port); | |
2033 | } | |
2034 | ||
2035 | /* | |
2036 | * mxser_rs_break() --- routine which turns the break handling on or off | |
2037 | */ | |
2038 | static int mxser_rs_break(struct tty_struct *tty, int break_state) | |
2039 | { | |
2040 | struct mxser_port *info = tty->driver_data; | |
2041 | unsigned long flags; | |
2042 | ||
2043 | spin_lock_irqsave(&info->slock, flags); | |
2044 | if (break_state == -1) | |
2045 | outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC, | |
2046 | info->ioaddr + UART_LCR); | |
2047 | else | |
2048 | outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC, | |
2049 | info->ioaddr + UART_LCR); | |
2050 | spin_unlock_irqrestore(&info->slock, flags); | |
2051 | return 0; | |
2052 | } | |
2053 | ||
2054 | static void mxser_receive_chars(struct tty_struct *tty, | |
2055 | struct mxser_port *port, int *status) | |
2056 | { | |
2057 | unsigned char ch, gdl; | |
2058 | int ignored = 0; | |
2059 | int cnt = 0; | |
2060 | int recv_room; | |
2061 | int max = 256; | |
2062 | ||
2063 | recv_room = tty->receive_room; | |
2064 | if (recv_room == 0 && !port->ldisc_stop_rx) | |
2065 | mxser_stoprx(tty); | |
2066 | if (port->board->chip_flag != MOXA_OTHER_UART) { | |
2067 | ||
2068 | if (*status & UART_LSR_SPECIAL) | |
2069 | goto intr_old; | |
2070 | if (port->board->chip_flag == MOXA_MUST_MU860_HWID && | |
2071 | (*status & MOXA_MUST_LSR_RERR)) | |
2072 | goto intr_old; | |
2073 | if (*status & MOXA_MUST_LSR_RERR) | |
2074 | goto intr_old; | |
2075 | ||
2076 | gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER); | |
2077 | ||
2078 | if (port->board->chip_flag == MOXA_MUST_MU150_HWID) | |
2079 | gdl &= MOXA_MUST_GDL_MASK; | |
2080 | if (gdl >= recv_room) { | |
2081 | if (!port->ldisc_stop_rx) | |
2082 | mxser_stoprx(tty); | |
2083 | } | |
2084 | while (gdl--) { | |
2085 | ch = inb(port->ioaddr + UART_RX); | |
2086 | tty_insert_flip_char(&port->port, ch, 0); | |
2087 | cnt++; | |
2088 | } | |
2089 | goto end_intr; | |
2090 | } | |
2091 | intr_old: | |
2092 | ||
2093 | do { | |
2094 | if (max-- < 0) | |
2095 | break; | |
2096 | ||
2097 | ch = inb(port->ioaddr + UART_RX); | |
2098 | if (port->board->chip_flag && (*status & UART_LSR_OE)) | |
2099 | outb(0x23, port->ioaddr + UART_FCR); | |
2100 | *status &= port->read_status_mask; | |
2101 | if (*status & port->ignore_status_mask) { | |
2102 | if (++ignored > 100) | |
2103 | break; | |
2104 | } else { | |
2105 | char flag = 0; | |
2106 | if (*status & UART_LSR_SPECIAL) { | |
2107 | if (*status & UART_LSR_BI) { | |
2108 | flag = TTY_BREAK; | |
2109 | port->icount.brk++; | |
2110 | ||
2111 | if (port->port.flags & ASYNC_SAK) | |
2112 | do_SAK(tty); | |
2113 | } else if (*status & UART_LSR_PE) { | |
2114 | flag = TTY_PARITY; | |
2115 | port->icount.parity++; | |
2116 | } else if (*status & UART_LSR_FE) { | |
2117 | flag = TTY_FRAME; | |
2118 | port->icount.frame++; | |
2119 | } else if (*status & UART_LSR_OE) { | |
2120 | flag = TTY_OVERRUN; | |
2121 | port->icount.overrun++; | |
2122 | } else | |
2123 | flag = TTY_BREAK; | |
2124 | } | |
2125 | tty_insert_flip_char(&port->port, ch, flag); | |
2126 | cnt++; | |
2127 | if (cnt >= recv_room) { | |
2128 | if (!port->ldisc_stop_rx) | |
2129 | mxser_stoprx(tty); | |
2130 | break; | |
2131 | } | |
2132 | ||
2133 | } | |
2134 | ||
2135 | if (port->board->chip_flag) | |
2136 | break; | |
2137 | ||
2138 | *status = inb(port->ioaddr + UART_LSR); | |
2139 | } while (*status & UART_LSR_DR); | |
2140 | ||
2141 | end_intr: | |
2142 | mxvar_log.rxcnt[tty->index] += cnt; | |
2143 | port->mon_data.rxcnt += cnt; | |
2144 | port->mon_data.up_rxcnt += cnt; | |
2145 | ||
2146 | /* | |
2147 | * We are called from an interrupt context with &port->slock | |
2148 | * being held. Drop it temporarily in order to prevent | |
2149 | * recursive locking. | |
2150 | */ | |
2151 | spin_unlock(&port->slock); | |
2152 | tty_flip_buffer_push(&port->port); | |
2153 | spin_lock(&port->slock); | |
2154 | } | |
2155 | ||
2156 | static void mxser_transmit_chars(struct tty_struct *tty, struct mxser_port *port) | |
2157 | { | |
2158 | int count, cnt; | |
2159 | ||
2160 | if (port->x_char) { | |
2161 | outb(port->x_char, port->ioaddr + UART_TX); | |
2162 | port->x_char = 0; | |
2163 | mxvar_log.txcnt[tty->index]++; | |
2164 | port->mon_data.txcnt++; | |
2165 | port->mon_data.up_txcnt++; | |
2166 | port->icount.tx++; | |
2167 | return; | |
2168 | } | |
2169 | ||
2170 | if (port->port.xmit_buf == NULL) | |
2171 | return; | |
2172 | ||
2173 | if (port->xmit_cnt <= 0 || tty->stopped || | |
2174 | (tty->hw_stopped && | |
2175 | (port->type != PORT_16550A) && | |
2176 | (!port->board->chip_flag))) { | |
2177 | port->IER &= ~UART_IER_THRI; | |
2178 | outb(port->IER, port->ioaddr + UART_IER); | |
2179 | return; | |
2180 | } | |
2181 | ||
2182 | cnt = port->xmit_cnt; | |
2183 | count = port->xmit_fifo_size; | |
2184 | do { | |
2185 | outb(port->port.xmit_buf[port->xmit_tail++], | |
2186 | port->ioaddr + UART_TX); | |
2187 | port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1); | |
2188 | if (--port->xmit_cnt <= 0) | |
2189 | break; | |
2190 | } while (--count > 0); | |
2191 | mxvar_log.txcnt[tty->index] += (cnt - port->xmit_cnt); | |
2192 | ||
2193 | port->mon_data.txcnt += (cnt - port->xmit_cnt); | |
2194 | port->mon_data.up_txcnt += (cnt - port->xmit_cnt); | |
2195 | port->icount.tx += (cnt - port->xmit_cnt); | |
2196 | ||
2197 | if (port->xmit_cnt < WAKEUP_CHARS) | |
2198 | tty_wakeup(tty); | |
2199 | ||
2200 | if (port->xmit_cnt <= 0) { | |
2201 | port->IER &= ~UART_IER_THRI; | |
2202 | outb(port->IER, port->ioaddr + UART_IER); | |
2203 | } | |
2204 | } | |
2205 | ||
2206 | /* | |
2207 | * This is the serial driver's generic interrupt routine | |
2208 | */ | |
2209 | static irqreturn_t mxser_interrupt(int irq, void *dev_id) | |
2210 | { | |
2211 | int status, iir, i; | |
2212 | struct mxser_board *brd = NULL; | |
2213 | struct mxser_port *port; | |
2214 | int max, irqbits, bits, msr; | |
2215 | unsigned int int_cnt, pass_counter = 0; | |
2216 | int handled = IRQ_NONE; | |
2217 | struct tty_struct *tty; | |
2218 | ||
2219 | for (i = 0; i < MXSER_BOARDS; i++) | |
2220 | if (dev_id == &mxser_boards[i]) { | |
2221 | brd = dev_id; | |
2222 | break; | |
2223 | } | |
2224 | ||
2225 | if (i == MXSER_BOARDS) | |
2226 | goto irq_stop; | |
2227 | if (brd == NULL) | |
2228 | goto irq_stop; | |
2229 | max = brd->info->nports; | |
2230 | while (pass_counter++ < MXSER_ISR_PASS_LIMIT) { | |
2231 | irqbits = inb(brd->vector) & brd->vector_mask; | |
2232 | if (irqbits == brd->vector_mask) | |
2233 | break; | |
2234 | ||
2235 | handled = IRQ_HANDLED; | |
2236 | for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) { | |
2237 | if (irqbits == brd->vector_mask) | |
2238 | break; | |
2239 | if (bits & irqbits) | |
2240 | continue; | |
2241 | port = &brd->ports[i]; | |
2242 | ||
2243 | int_cnt = 0; | |
2244 | spin_lock(&port->slock); | |
2245 | do { | |
2246 | iir = inb(port->ioaddr + UART_IIR); | |
2247 | if (iir & UART_IIR_NO_INT) | |
2248 | break; | |
2249 | iir &= MOXA_MUST_IIR_MASK; | |
2250 | tty = tty_port_tty_get(&port->port); | |
2251 | if (!tty || port->closing || | |
2252 | !tty_port_initialized(&port->port)) { | |
2253 | status = inb(port->ioaddr + UART_LSR); | |
2254 | outb(0x27, port->ioaddr + UART_FCR); | |
2255 | inb(port->ioaddr + UART_MSR); | |
2256 | tty_kref_put(tty); | |
2257 | break; | |
2258 | } | |
2259 | ||
2260 | status = inb(port->ioaddr + UART_LSR); | |
2261 | ||
2262 | if (status & UART_LSR_PE) | |
2263 | port->err_shadow |= NPPI_NOTIFY_PARITY; | |
2264 | if (status & UART_LSR_FE) | |
2265 | port->err_shadow |= NPPI_NOTIFY_FRAMING; | |
2266 | if (status & UART_LSR_OE) | |
2267 | port->err_shadow |= | |
2268 | NPPI_NOTIFY_HW_OVERRUN; | |
2269 | if (status & UART_LSR_BI) | |
2270 | port->err_shadow |= NPPI_NOTIFY_BREAK; | |
2271 | ||
2272 | if (port->board->chip_flag) { | |
2273 | if (iir == MOXA_MUST_IIR_GDA || | |
2274 | iir == MOXA_MUST_IIR_RDA || | |
2275 | iir == MOXA_MUST_IIR_RTO || | |
2276 | iir == MOXA_MUST_IIR_LSR) | |
2277 | mxser_receive_chars(tty, port, | |
2278 | &status); | |
2279 | ||
2280 | } else { | |
2281 | status &= port->read_status_mask; | |
2282 | if (status & UART_LSR_DR) | |
2283 | mxser_receive_chars(tty, port, | |
2284 | &status); | |
2285 | } | |
2286 | msr = inb(port->ioaddr + UART_MSR); | |
2287 | if (msr & UART_MSR_ANY_DELTA) | |
2288 | mxser_check_modem_status(tty, port, msr); | |
2289 | ||
2290 | if (port->board->chip_flag) { | |
2291 | if (iir == 0x02 && (status & | |
2292 | UART_LSR_THRE)) | |
2293 | mxser_transmit_chars(tty, port); | |
2294 | } else { | |
2295 | if (status & UART_LSR_THRE) | |
2296 | mxser_transmit_chars(tty, port); | |
2297 | } | |
2298 | tty_kref_put(tty); | |
2299 | } while (int_cnt++ < MXSER_ISR_PASS_LIMIT); | |
2300 | spin_unlock(&port->slock); | |
2301 | } | |
2302 | } | |
2303 | ||
2304 | irq_stop: | |
2305 | return handled; | |
2306 | } | |
2307 | ||
2308 | static const struct tty_operations mxser_ops = { | |
2309 | .open = mxser_open, | |
2310 | .close = mxser_close, | |
2311 | .write = mxser_write, | |
2312 | .put_char = mxser_put_char, | |
2313 | .flush_chars = mxser_flush_chars, | |
2314 | .write_room = mxser_write_room, | |
2315 | .chars_in_buffer = mxser_chars_in_buffer, | |
2316 | .flush_buffer = mxser_flush_buffer, | |
2317 | .ioctl = mxser_ioctl, | |
2318 | .throttle = mxser_throttle, | |
2319 | .unthrottle = mxser_unthrottle, | |
2320 | .set_termios = mxser_set_termios, | |
2321 | .stop = mxser_stop, | |
2322 | .start = mxser_start, | |
2323 | .hangup = mxser_hangup, | |
2324 | .break_ctl = mxser_rs_break, | |
2325 | .wait_until_sent = mxser_wait_until_sent, | |
2326 | .tiocmget = mxser_tiocmget, | |
2327 | .tiocmset = mxser_tiocmset, | |
2328 | .set_serial = mxser_set_serial_info, | |
2329 | .get_serial = mxser_get_serial_info, | |
2330 | .get_icount = mxser_get_icount, | |
2331 | }; | |
2332 | ||
2333 | static const struct tty_port_operations mxser_port_ops = { | |
2334 | .carrier_raised = mxser_carrier_raised, | |
2335 | .dtr_rts = mxser_dtr_rts, | |
2336 | .activate = mxser_activate, | |
2337 | .shutdown = mxser_shutdown_port, | |
2338 | }; | |
2339 | ||
2340 | /* | |
2341 | * The MOXA Smartio/Industio serial driver boot-time initialization code! | |
2342 | */ | |
2343 | ||
2344 | static bool allow_overlapping_vector; | |
2345 | module_param(allow_overlapping_vector, bool, S_IRUGO); | |
2346 | MODULE_PARM_DESC(allow_overlapping_vector, "whether we allow ISA cards to be configured such that vector overlabs IO ports (default=no)"); | |
2347 | ||
2348 | static bool mxser_overlapping_vector(struct mxser_board *brd) | |
2349 | { | |
2350 | return allow_overlapping_vector && | |
2351 | brd->vector >= brd->ports[0].ioaddr && | |
2352 | brd->vector < brd->ports[0].ioaddr + 8 * brd->info->nports; | |
2353 | } | |
2354 | ||
2355 | static int mxser_request_vector(struct mxser_board *brd) | |
2356 | { | |
2357 | if (mxser_overlapping_vector(brd)) | |
2358 | return 0; | |
2359 | return request_region(brd->vector, 1, "mxser(vector)") ? 0 : -EIO; | |
2360 | } | |
2361 | ||
2362 | static void mxser_release_vector(struct mxser_board *brd) | |
2363 | { | |
2364 | if (mxser_overlapping_vector(brd)) | |
2365 | return; | |
2366 | release_region(brd->vector, 1); | |
2367 | } | |
2368 | ||
2369 | static void mxser_release_ISA_res(struct mxser_board *brd) | |
2370 | { | |
2371 | release_region(brd->ports[0].ioaddr, 8 * brd->info->nports); | |
2372 | mxser_release_vector(brd); | |
2373 | } | |
2374 | ||
2375 | static int mxser_initbrd(struct mxser_board *brd) | |
2376 | { | |
2377 | struct mxser_port *info; | |
2378 | unsigned int i; | |
2379 | int retval; | |
2380 | ||
2381 | printk(KERN_INFO "mxser: max. baud rate = %d bps\n", | |
2382 | brd->ports[0].max_baud); | |
2383 | ||
2384 | for (i = 0; i < brd->info->nports; i++) { | |
2385 | info = &brd->ports[i]; | |
2386 | tty_port_init(&info->port); | |
2387 | info->port.ops = &mxser_port_ops; | |
2388 | info->board = brd; | |
2389 | info->stop_rx = 0; | |
2390 | info->ldisc_stop_rx = 0; | |
2391 | ||
2392 | /* Enhance mode enabled here */ | |
2393 | if (brd->chip_flag != MOXA_OTHER_UART) | |
2394 | mxser_enable_must_enchance_mode(info->ioaddr); | |
2395 | ||
2396 | info->type = brd->uart_type; | |
2397 | ||
2398 | process_txrx_fifo(info); | |
2399 | ||
2400 | info->custom_divisor = info->baud_base * 16; | |
2401 | info->port.close_delay = 5 * HZ / 10; | |
2402 | info->port.closing_wait = 30 * HZ; | |
2403 | info->normal_termios = mxvar_sdriver->init_termios; | |
2404 | memset(&info->mon_data, 0, sizeof(struct mxser_mon)); | |
2405 | info->err_shadow = 0; | |
2406 | spin_lock_init(&info->slock); | |
2407 | ||
2408 | /* before set INT ISR, disable all int */ | |
2409 | outb(inb(info->ioaddr + UART_IER) & 0xf0, | |
2410 | info->ioaddr + UART_IER); | |
2411 | } | |
2412 | ||
2413 | retval = request_irq(brd->irq, mxser_interrupt, IRQF_SHARED, "mxser", | |
2414 | brd); | |
2415 | if (retval) { | |
2416 | for (i = 0; i < brd->info->nports; i++) | |
2417 | tty_port_destroy(&brd->ports[i].port); | |
2418 | printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may " | |
2419 | "conflict with another device.\n", | |
2420 | brd->info->name, brd->irq); | |
2421 | } | |
2422 | ||
2423 | return retval; | |
2424 | } | |
2425 | ||
2426 | static void mxser_board_remove(struct mxser_board *brd) | |
2427 | { | |
2428 | unsigned int i; | |
2429 | ||
2430 | for (i = 0; i < brd->info->nports; i++) { | |
2431 | tty_unregister_device(mxvar_sdriver, brd->idx + i); | |
2432 | tty_port_destroy(&brd->ports[i].port); | |
2433 | } | |
2434 | free_irq(brd->irq, brd); | |
2435 | } | |
2436 | ||
2437 | static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd) | |
2438 | { | |
2439 | int id, i, bits, ret; | |
2440 | unsigned short regs[16], irq; | |
2441 | unsigned char scratch, scratch2; | |
2442 | ||
2443 | brd->chip_flag = MOXA_OTHER_UART; | |
2444 | ||
2445 | id = mxser_read_register(cap, regs); | |
2446 | switch (id) { | |
2447 | case C168_ASIC_ID: | |
2448 | brd->info = &mxser_cards[0]; | |
2449 | break; | |
2450 | case C104_ASIC_ID: | |
2451 | brd->info = &mxser_cards[1]; | |
2452 | break; | |
2453 | case CI104J_ASIC_ID: | |
2454 | brd->info = &mxser_cards[2]; | |
2455 | break; | |
2456 | case C102_ASIC_ID: | |
2457 | brd->info = &mxser_cards[5]; | |
2458 | break; | |
2459 | case CI132_ASIC_ID: | |
2460 | brd->info = &mxser_cards[6]; | |
2461 | break; | |
2462 | case CI134_ASIC_ID: | |
2463 | brd->info = &mxser_cards[7]; | |
2464 | break; | |
2465 | default: | |
2466 | return 0; | |
2467 | } | |
2468 | ||
2469 | irq = 0; | |
2470 | /* some ISA cards have 2 ports, but we want to see them as 4-port (why?) | |
2471 | Flag-hack checks if configuration should be read as 2-port here. */ | |
2472 | if (brd->info->nports == 2 || (brd->info->flags & MXSER_HAS2)) { | |
2473 | irq = regs[9] & 0xF000; | |
2474 | irq = irq | (irq >> 4); | |
2475 | if (irq != (regs[9] & 0xFF00)) | |
2476 | goto err_irqconflict; | |
2477 | } else if (brd->info->nports == 4) { | |
2478 | irq = regs[9] & 0xF000; | |
2479 | irq = irq | (irq >> 4); | |
2480 | irq = irq | (irq >> 8); | |
2481 | if (irq != regs[9]) | |
2482 | goto err_irqconflict; | |
2483 | } else if (brd->info->nports == 8) { | |
2484 | irq = regs[9] & 0xF000; | |
2485 | irq = irq | (irq >> 4); | |
2486 | irq = irq | (irq >> 8); | |
2487 | if ((irq != regs[9]) || (irq != regs[10])) | |
2488 | goto err_irqconflict; | |
2489 | } | |
2490 | ||
2491 | if (!irq) { | |
2492 | printk(KERN_ERR "mxser: interrupt number unset\n"); | |
2493 | return -EIO; | |
2494 | } | |
2495 | brd->irq = ((int)(irq & 0xF000) >> 12); | |
2496 | for (i = 0; i < 8; i++) | |
2497 | brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8; | |
2498 | if ((regs[12] & 0x80) == 0) { | |
2499 | printk(KERN_ERR "mxser: invalid interrupt vector\n"); | |
2500 | return -EIO; | |
2501 | } | |
2502 | brd->vector = (int)regs[11]; /* interrupt vector */ | |
2503 | if (id == 1) | |
2504 | brd->vector_mask = 0x00FF; | |
2505 | else | |
2506 | brd->vector_mask = 0x000F; | |
2507 | for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) { | |
2508 | if (regs[12] & bits) { | |
2509 | brd->ports[i].baud_base = 921600; | |
2510 | brd->ports[i].max_baud = 921600; | |
2511 | } else { | |
2512 | brd->ports[i].baud_base = 115200; | |
2513 | brd->ports[i].max_baud = 115200; | |
2514 | } | |
2515 | } | |
2516 | scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB); | |
2517 | outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR); | |
2518 | outb(0, cap + UART_EFR); /* EFR is the same as FCR */ | |
2519 | outb(scratch2, cap + UART_LCR); | |
2520 | outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR); | |
2521 | scratch = inb(cap + UART_IIR); | |
2522 | ||
2523 | if (scratch & 0xC0) | |
2524 | brd->uart_type = PORT_16550A; | |
2525 | else | |
2526 | brd->uart_type = PORT_16450; | |
2527 | if (!request_region(brd->ports[0].ioaddr, 8 * brd->info->nports, | |
2528 | "mxser(IO)")) { | |
2529 | printk(KERN_ERR "mxser: can't request ports I/O region: " | |
2530 | "0x%.8lx-0x%.8lx\n", | |
2531 | brd->ports[0].ioaddr, brd->ports[0].ioaddr + | |
2532 | 8 * brd->info->nports - 1); | |
2533 | return -EIO; | |
2534 | } | |
2535 | ||
2536 | ret = mxser_request_vector(brd); | |
2537 | if (ret) { | |
2538 | release_region(brd->ports[0].ioaddr, 8 * brd->info->nports); | |
2539 | printk(KERN_ERR "mxser: can't request interrupt vector region: " | |
2540 | "0x%.8lx-0x%.8lx\n", | |
2541 | brd->ports[0].ioaddr, brd->ports[0].ioaddr + | |
2542 | 8 * brd->info->nports - 1); | |
2543 | return ret; | |
2544 | } | |
2545 | return brd->info->nports; | |
2546 | ||
2547 | err_irqconflict: | |
2548 | printk(KERN_ERR "mxser: invalid interrupt number\n"); | |
2549 | return -EIO; | |
2550 | } | |
2551 | ||
2552 | static int mxser_probe(struct pci_dev *pdev, | |
2553 | const struct pci_device_id *ent) | |
2554 | { | |
2555 | #ifdef CONFIG_PCI | |
2556 | struct mxser_board *brd; | |
2557 | unsigned int i, j; | |
2558 | unsigned long ioaddress; | |
2559 | struct device *tty_dev; | |
2560 | int retval = -EINVAL; | |
2561 | ||
2562 | for (i = 0; i < MXSER_BOARDS; i++) | |
2563 | if (mxser_boards[i].info == NULL) | |
2564 | break; | |
2565 | ||
2566 | if (i >= MXSER_BOARDS) { | |
2567 | dev_err(&pdev->dev, "too many boards found (maximum %d), board " | |
2568 | "not configured\n", MXSER_BOARDS); | |
2569 | goto err; | |
2570 | } | |
2571 | ||
2572 | brd = &mxser_boards[i]; | |
2573 | brd->idx = i * MXSER_PORTS_PER_BOARD; | |
2574 | dev_info(&pdev->dev, "found MOXA %s board (BusNo=%d, DevNo=%d)\n", | |
2575 | mxser_cards[ent->driver_data].name, | |
2576 | pdev->bus->number, PCI_SLOT(pdev->devfn)); | |
2577 | ||
2578 | retval = pci_enable_device(pdev); | |
2579 | if (retval) { | |
2580 | dev_err(&pdev->dev, "PCI enable failed\n"); | |
2581 | goto err; | |
2582 | } | |
2583 | ||
2584 | /* io address */ | |
2585 | ioaddress = pci_resource_start(pdev, 2); | |
2586 | retval = pci_request_region(pdev, 2, "mxser(IO)"); | |
2587 | if (retval) | |
2588 | goto err_dis; | |
2589 | ||
2590 | brd->info = &mxser_cards[ent->driver_data]; | |
2591 | for (i = 0; i < brd->info->nports; i++) | |
2592 | brd->ports[i].ioaddr = ioaddress + 8 * i; | |
2593 | ||
2594 | /* vector */ | |
2595 | ioaddress = pci_resource_start(pdev, 3); | |
2596 | retval = pci_request_region(pdev, 3, "mxser(vector)"); | |
2597 | if (retval) | |
2598 | goto err_zero; | |
2599 | brd->vector = ioaddress; | |
2600 | ||
2601 | /* irq */ | |
2602 | brd->irq = pdev->irq; | |
2603 | ||
2604 | brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr); | |
2605 | brd->uart_type = PORT_16550A; | |
2606 | brd->vector_mask = 0; | |
2607 | ||
2608 | for (i = 0; i < brd->info->nports; i++) { | |
2609 | for (j = 0; j < UART_INFO_NUM; j++) { | |
2610 | if (Gpci_uart_info[j].type == brd->chip_flag) { | |
2611 | brd->ports[i].max_baud = | |
2612 | Gpci_uart_info[j].max_baud; | |
2613 | ||
2614 | /* exception....CP-102 */ | |
2615 | if (brd->info->flags & MXSER_HIGHBAUD) | |
2616 | brd->ports[i].max_baud = 921600; | |
2617 | break; | |
2618 | } | |
2619 | } | |
2620 | } | |
2621 | ||
2622 | if (brd->chip_flag == MOXA_MUST_MU860_HWID) { | |
2623 | for (i = 0; i < brd->info->nports; i++) { | |
2624 | if (i < 4) | |
2625 | brd->ports[i].opmode_ioaddr = ioaddress + 4; | |
2626 | else | |
2627 | brd->ports[i].opmode_ioaddr = ioaddress + 0x0c; | |
2628 | } | |
2629 | outb(0, ioaddress + 4); /* default set to RS232 mode */ | |
2630 | outb(0, ioaddress + 0x0c); /* default set to RS232 mode */ | |
2631 | } | |
2632 | ||
2633 | for (i = 0; i < brd->info->nports; i++) { | |
2634 | brd->vector_mask |= (1 << i); | |
2635 | brd->ports[i].baud_base = 921600; | |
2636 | } | |
2637 | ||
2638 | /* mxser_initbrd will hook ISR. */ | |
2639 | retval = mxser_initbrd(brd); | |
2640 | if (retval) | |
2641 | goto err_rel3; | |
2642 | ||
2643 | for (i = 0; i < brd->info->nports; i++) { | |
2644 | tty_dev = tty_port_register_device(&brd->ports[i].port, | |
2645 | mxvar_sdriver, brd->idx + i, &pdev->dev); | |
2646 | if (IS_ERR(tty_dev)) { | |
2647 | retval = PTR_ERR(tty_dev); | |
2648 | for (; i > 0; i--) | |
2649 | tty_unregister_device(mxvar_sdriver, | |
2650 | brd->idx + i - 1); | |
2651 | goto err_relbrd; | |
2652 | } | |
2653 | } | |
2654 | ||
2655 | pci_set_drvdata(pdev, brd); | |
2656 | ||
2657 | return 0; | |
2658 | err_relbrd: | |
2659 | for (i = 0; i < brd->info->nports; i++) | |
2660 | tty_port_destroy(&brd->ports[i].port); | |
2661 | free_irq(brd->irq, brd); | |
2662 | err_rel3: | |
2663 | pci_release_region(pdev, 3); | |
2664 | err_zero: | |
2665 | brd->info = NULL; | |
2666 | pci_release_region(pdev, 2); | |
2667 | err_dis: | |
2668 | pci_disable_device(pdev); | |
2669 | err: | |
2670 | return retval; | |
2671 | #else | |
2672 | return -ENODEV; | |
2673 | #endif | |
2674 | } | |
2675 | ||
2676 | static void mxser_remove(struct pci_dev *pdev) | |
2677 | { | |
2678 | #ifdef CONFIG_PCI | |
2679 | struct mxser_board *brd = pci_get_drvdata(pdev); | |
2680 | ||
2681 | mxser_board_remove(brd); | |
2682 | ||
2683 | pci_release_region(pdev, 2); | |
2684 | pci_release_region(pdev, 3); | |
2685 | pci_disable_device(pdev); | |
2686 | brd->info = NULL; | |
2687 | #endif | |
2688 | } | |
2689 | ||
2690 | static struct pci_driver mxser_driver = { | |
2691 | .name = "mxser", | |
2692 | .id_table = mxser_pcibrds, | |
2693 | .probe = mxser_probe, | |
2694 | .remove = mxser_remove | |
2695 | }; | |
2696 | ||
2697 | static int __init mxser_module_init(void) | |
2698 | { | |
2699 | struct mxser_board *brd; | |
2700 | struct device *tty_dev; | |
2701 | unsigned int b, i, m; | |
2702 | int retval; | |
2703 | ||
2704 | mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1); | |
2705 | if (!mxvar_sdriver) | |
2706 | return -ENOMEM; | |
2707 | ||
2708 | printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n", | |
2709 | MXSER_VERSION); | |
2710 | ||
2711 | /* Initialize the tty_driver structure */ | |
2712 | mxvar_sdriver->name = "ttyMI"; | |
2713 | mxvar_sdriver->major = ttymajor; | |
2714 | mxvar_sdriver->minor_start = 0; | |
2715 | mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL; | |
2716 | mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL; | |
2717 | mxvar_sdriver->init_termios = tty_std_termios; | |
2718 | mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL; | |
2719 | mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_DYNAMIC_DEV; | |
2720 | tty_set_operations(mxvar_sdriver, &mxser_ops); | |
2721 | ||
2722 | retval = tty_register_driver(mxvar_sdriver); | |
2723 | if (retval) { | |
2724 | printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family " | |
2725 | "tty driver !\n"); | |
2726 | goto err_put; | |
2727 | } | |
2728 | ||
2729 | /* Start finding ISA boards here */ | |
2730 | for (m = 0, b = 0; b < MXSER_BOARDS; b++) { | |
2731 | if (!ioaddr[b]) | |
2732 | continue; | |
2733 | ||
2734 | brd = &mxser_boards[m]; | |
2735 | retval = mxser_get_ISA_conf(ioaddr[b], brd); | |
2736 | if (retval <= 0) { | |
2737 | brd->info = NULL; | |
2738 | continue; | |
2739 | } | |
2740 | ||
2741 | printk(KERN_INFO "mxser: found MOXA %s board (CAP=0x%lx)\n", | |
2742 | brd->info->name, ioaddr[b]); | |
2743 | ||
2744 | /* mxser_initbrd will hook ISR. */ | |
2745 | if (mxser_initbrd(brd) < 0) { | |
2746 | mxser_release_ISA_res(brd); | |
2747 | brd->info = NULL; | |
2748 | continue; | |
2749 | } | |
2750 | ||
2751 | brd->idx = m * MXSER_PORTS_PER_BOARD; | |
2752 | for (i = 0; i < brd->info->nports; i++) { | |
2753 | tty_dev = tty_port_register_device(&brd->ports[i].port, | |
2754 | mxvar_sdriver, brd->idx + i, NULL); | |
2755 | if (IS_ERR(tty_dev)) { | |
2756 | for (; i > 0; i--) | |
2757 | tty_unregister_device(mxvar_sdriver, | |
2758 | brd->idx + i - 1); | |
2759 | for (i = 0; i < brd->info->nports; i++) | |
2760 | tty_port_destroy(&brd->ports[i].port); | |
2761 | free_irq(brd->irq, brd); | |
2762 | mxser_release_ISA_res(brd); | |
2763 | brd->info = NULL; | |
2764 | break; | |
2765 | } | |
2766 | } | |
2767 | if (brd->info == NULL) | |
2768 | continue; | |
2769 | ||
2770 | m++; | |
2771 | } | |
2772 | ||
2773 | retval = pci_register_driver(&mxser_driver); | |
2774 | if (retval) { | |
2775 | printk(KERN_ERR "mxser: can't register pci driver\n"); | |
2776 | if (!m) { | |
2777 | retval = -ENODEV; | |
2778 | goto err_unr; | |
2779 | } /* else: we have some ISA cards under control */ | |
2780 | } | |
2781 | ||
2782 | return 0; | |
2783 | err_unr: | |
2784 | tty_unregister_driver(mxvar_sdriver); | |
2785 | err_put: | |
2786 | put_tty_driver(mxvar_sdriver); | |
2787 | return retval; | |
2788 | } | |
2789 | ||
2790 | static void __exit mxser_module_exit(void) | |
2791 | { | |
2792 | unsigned int i; | |
2793 | ||
2794 | pci_unregister_driver(&mxser_driver); | |
2795 | ||
2796 | for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */ | |
2797 | if (mxser_boards[i].info != NULL) | |
2798 | mxser_board_remove(&mxser_boards[i]); | |
2799 | tty_unregister_driver(mxvar_sdriver); | |
2800 | put_tty_driver(mxvar_sdriver); | |
2801 | ||
2802 | for (i = 0; i < MXSER_BOARDS; i++) | |
2803 | if (mxser_boards[i].info != NULL) | |
2804 | mxser_release_ISA_res(&mxser_boards[i]); | |
2805 | } | |
2806 | ||
2807 | module_init(mxser_module_init); | |
2808 | module_exit(mxser_module_exit); |